/*
- * Copyright (c) 2013-2015 Apple Inc. All rights reserved.
+ * Copyright (c) 2013-2020 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <string.h>
#include <sys/systm.h>
#include <sys/types.h>
-#include <sys/syslog.h>
#include <sys/queue.h>
#include <sys/malloc.h>
-#include <libkern/OSMalloc.h>
#include <sys/kernel.h>
#include <sys/kern_control.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
+#include <sys/coalition.h>
+#include <sys/ubc.h>
+#include <sys/codesign.h>
+#include <kern/cs_blobs.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/tcp_var.h>
+#include <netinet/tcp_cache.h>
#include <netinet/udp.h>
#include <netinet/in_pcb.h>
+#include <netinet/in_tclass.h>
#include <netinet6/esp.h>
#include <net/flowhash.h>
#include <net/if_var.h>
#include <sys/sysproto.h>
#include <sys/priv.h>
#include <sys/kern_event.h>
+#include <sys/file_internal.h>
+#include <IOKit/IOBSD.h>
+#include <libkern/crypto/rand.h>
+#include <corecrypto/cchmac.h>
+#include <corecrypto/ccsha2.h>
+#include <os/refcnt.h>
#include <net/network_agent.h>
#include <net/necp.h>
+#include <netinet/flow_divert_proto.h>
/*
* NECP - Network Extension Control Policy database
* ------------------------------------------------
* The goal of this module is to allow clients connecting via a
- * kernel control socket to create high-level policy sessions, which
+ * policy file descriptor to create high-level policy sessions, which
* are ingested into low-level kernel policies that control and tag
* traffic at the application, socket, and IP layers.
*
* can specify the sub-order for each policy it creates which will be
* used to further sort the kernel policies.
*
- * Kernel Control Socket --> 1 necp_session --> list of necp_session_policy structs
+ * Policy fd --> 1 necp_session --> list of necp_session_policy structs
*
* ------------------------------------------------
* Kernel Policies
* list is traversed to create optimized sub-lists ("Maps") which are used during
* data-path evaluation. IP policies are sent into necp_kernel_ip_output_policies_map,
* which hashes incoming packets based on marked socket-layer policies, and removes
- * duplicate or overlapping polcies. Socket policies are sent into two maps,
+ * duplicate or overlapping policies. Socket policies are sent into two maps,
* necp_kernel_socket_policies_map and necp_kernel_socket_policies_app_layer_map.
* The app layer map is used for policy checks coming in from user space, and is one
* list with duplicate and overlapping policies removed. The socket map hashes based
u_int32_t necp_drop_all_order = 0;
u_int32_t necp_drop_all_level = 0;
-u_int32_t necp_pass_loopback = 1; // 0=Off, 1=On
+#define NECP_LOOPBACK_PASS_ALL 1 // Pass all loopback traffic
+#define NECP_LOOPBACK_PASS_WITH_FILTER 2 // Pass all loopback traffic, but activate content filter and/or flow divert if applicable
+
+#if defined(XNU_TARGET_OS_OSX)
+#define NECP_LOOPBACK_PASS_DEFAULT NECP_LOOPBACK_PASS_WITH_FILTER
+#else
+#define NECP_LOOPBACK_PASS_DEFAULT NECP_LOOPBACK_PASS_ALL
+#endif
+
+u_int32_t necp_pass_loopback = NECP_LOOPBACK_PASS_DEFAULT;
u_int32_t necp_pass_keepalives = 1; // 0=Off, 1=On
+u_int32_t necp_pass_interpose = 1; // 0=Off, 1=On
+u_int32_t necp_restrict_multicast = 1; // 0=Off, 1=On
+u_int32_t necp_dedup_policies = 0; // 0=Off, 1=On
-u_int32_t necp_debug = 0; // 0=None, 1=Basic, 2=EveryMatch
+u_int32_t necp_drop_unentitled_order = 0;
+#ifdef XNU_TARGET_OS_WATCH
+u_int32_t necp_drop_unentitled_level = NECP_SESSION_PRIORITY_CONTROL + 1; // Block all unentitled traffic from policies below control level
+#else // XNU_TARGET_OS_WATCH
+u_int32_t necp_drop_unentitled_level = 0;
+#endif // XNU_TARGET_OS_WATCH
-u_int32_t necp_session_count = 0;
+u_int32_t necp_debug = 0; // 0=None, 1=Basic, 2=EveryMatch
-#define NECPLOG(level, format, ...) do { \
- log((level > LOG_NOTICE ? LOG_NOTICE : level), "%s: " format "\n", __FUNCTION__, __VA_ARGS__); \
-} while (0)
+os_log_t necp_log_handle = NULL;
-#define NECPLOG0(level, msg) do { \
- log((level > LOG_NOTICE ? LOG_NOTICE : level), "%s: %s\n", __FUNCTION__, msg); \
-} while (0)
+u_int32_t necp_session_count = 0;
-#define LIST_INSERT_SORTED_ASCENDING(head, elm, field, sortfield, tmpelm) do { \
- if (LIST_EMPTY((head)) || (LIST_FIRST(head)->sortfield >= (elm)->sortfield)) { \
- LIST_INSERT_HEAD((head), elm, field); \
- } else { \
- LIST_FOREACH(tmpelm, head, field) { \
- if (LIST_NEXT(tmpelm, field) == NULL || LIST_NEXT(tmpelm, field)->sortfield >= (elm)->sortfield) { \
- LIST_INSERT_AFTER(tmpelm, elm, field); \
- break; \
- } \
- } \
- } \
+ZONE_DECLARE(necp_session_policy_zone, "necp_session_policy",
+ sizeof(struct necp_session_policy), ZC_ZFREE_CLEARMEM | ZC_NOENCRYPT);
+ZONE_DECLARE(necp_socket_policy_zone, "necp_socket_policy",
+ sizeof(struct necp_kernel_socket_policy), ZC_ZFREE_CLEARMEM | ZC_NOENCRYPT);
+ZONE_DECLARE(necp_ip_policy_zone, "necp_ip_policy",
+ sizeof(struct necp_kernel_ip_output_policy), ZC_ZFREE_CLEARMEM | ZC_NOENCRYPT);
+
+#define LIST_INSERT_SORTED_ASCENDING(head, elm, field, sortfield, tmpelm) do { \
+ if (LIST_EMPTY((head)) || (LIST_FIRST(head)->sortfield >= (elm)->sortfield)) { \
+ LIST_INSERT_HEAD((head), elm, field); \
+ } else { \
+ LIST_FOREACH(tmpelm, head, field) { \
+ if (LIST_NEXT(tmpelm, field) == NULL || LIST_NEXT(tmpelm, field)->sortfield >= (elm)->sortfield) { \
+ LIST_INSERT_AFTER(tmpelm, elm, field); \
+ break; \
+ } \
+ } \
+ } \
} while (0)
-#define LIST_INSERT_SORTED_TWICE_ASCENDING(head, elm, field, firstsortfield, secondsortfield, tmpelm) do { \
- if (LIST_EMPTY((head)) || (LIST_FIRST(head)->firstsortfield > (elm)->firstsortfield) || ((LIST_FIRST(head)->firstsortfield == (elm)->firstsortfield) && (LIST_FIRST(head)->secondsortfield >= (elm)->secondsortfield))) { \
- LIST_INSERT_HEAD((head), elm, field); \
- } else { \
- LIST_FOREACH(tmpelm, head, field) { \
- if (LIST_NEXT(tmpelm, field) == NULL || (LIST_NEXT(tmpelm, field)->firstsortfield > (elm)->firstsortfield) || ((LIST_NEXT(tmpelm, field)->firstsortfield == (elm)->firstsortfield) && (LIST_NEXT(tmpelm, field)->secondsortfield >= (elm)->secondsortfield))) { \
- LIST_INSERT_AFTER(tmpelm, elm, field); \
- break; \
- } \
- } \
- } \
+#define LIST_INSERT_SORTED_TWICE_ASCENDING(head, elm, field, firstsortfield, secondsortfield, tmpelm) do { \
+ if (LIST_EMPTY((head)) || (LIST_FIRST(head)->firstsortfield > (elm)->firstsortfield) || ((LIST_FIRST(head)->firstsortfield == (elm)->firstsortfield) && (LIST_FIRST(head)->secondsortfield >= (elm)->secondsortfield))) { \
+ LIST_INSERT_HEAD((head), elm, field); \
+ } else { \
+ LIST_FOREACH(tmpelm, head, field) { \
+ if (LIST_NEXT(tmpelm, field) == NULL || (LIST_NEXT(tmpelm, field)->firstsortfield > (elm)->firstsortfield) || ((LIST_NEXT(tmpelm, field)->firstsortfield == (elm)->firstsortfield) && (LIST_NEXT(tmpelm, field)->secondsortfield >= (elm)->secondsortfield))) { \
+ LIST_INSERT_AFTER(tmpelm, elm, field); \
+ break; \
+ } \
+ } \
+ } \
} while (0)
-#define LIST_INSERT_SORTED_THRICE_ASCENDING(head, elm, field, firstsortfield, secondsortfield, thirdsortfield, tmpelm) do { \
- if (LIST_EMPTY((head)) || (LIST_FIRST(head)->firstsortfield > (elm)->firstsortfield) || ((LIST_FIRST(head)->firstsortfield == (elm)->firstsortfield) && (LIST_FIRST(head)->secondsortfield >= (elm)->secondsortfield)) || ((LIST_FIRST(head)->firstsortfield == (elm)->firstsortfield) && (LIST_FIRST(head)->secondsortfield == (elm)->secondsortfield) && (LIST_FIRST(head)->thirdsortfield >= (elm)->thirdsortfield))) { \
- LIST_INSERT_HEAD((head), elm, field); \
- } else { \
- LIST_FOREACH(tmpelm, head, field) { \
- if (LIST_NEXT(tmpelm, field) == NULL || (LIST_NEXT(tmpelm, field)->firstsortfield > (elm)->firstsortfield) || ((LIST_NEXT(tmpelm, field)->firstsortfield == (elm)->firstsortfield) && (LIST_NEXT(tmpelm, field)->secondsortfield >= (elm)->secondsortfield)) || ((LIST_NEXT(tmpelm, field)->firstsortfield == (elm)->firstsortfield) && (LIST_NEXT(tmpelm, field)->secondsortfield == (elm)->secondsortfield) && (LIST_NEXT(tmpelm, field)->thirdsortfield >= (elm)->thirdsortfield))) { \
- LIST_INSERT_AFTER(tmpelm, elm, field); \
- break; \
- } \
- } \
- } \
+#define LIST_INSERT_SORTED_THRICE_ASCENDING(head, elm, field, firstsortfield, secondsortfield, thirdsortfield, tmpelm) do { \
+ if (LIST_EMPTY((head)) || (LIST_FIRST(head)->firstsortfield > (elm)->firstsortfield) || ((LIST_FIRST(head)->firstsortfield == (elm)->firstsortfield) && (LIST_FIRST(head)->secondsortfield >= (elm)->secondsortfield)) || ((LIST_FIRST(head)->firstsortfield == (elm)->firstsortfield) && (LIST_FIRST(head)->secondsortfield == (elm)->secondsortfield) && (LIST_FIRST(head)->thirdsortfield >= (elm)->thirdsortfield))) { \
+ LIST_INSERT_HEAD((head), elm, field); \
+ } else { \
+ LIST_FOREACH(tmpelm, head, field) { \
+ if (LIST_NEXT(tmpelm, field) == NULL || (LIST_NEXT(tmpelm, field)->firstsortfield > (elm)->firstsortfield) || ((LIST_NEXT(tmpelm, field)->firstsortfield == (elm)->firstsortfield) && (LIST_NEXT(tmpelm, field)->secondsortfield >= (elm)->secondsortfield)) || ((LIST_NEXT(tmpelm, field)->firstsortfield == (elm)->firstsortfield) && (LIST_NEXT(tmpelm, field)->secondsortfield == (elm)->secondsortfield) && (LIST_NEXT(tmpelm, field)->thirdsortfield >= (elm)->thirdsortfield))) { \
+ LIST_INSERT_AFTER(tmpelm, elm, field); \
+ break; \
+ } \
+ } \
+ } \
} while (0)
-#define NECP_KERNEL_CONDITION_ALL_INTERFACES 0x00001
-#define NECP_KERNEL_CONDITION_BOUND_INTERFACE 0x00002
-#define NECP_KERNEL_CONDITION_PROTOCOL 0x00004
-#define NECP_KERNEL_CONDITION_LOCAL_START 0x00008
-#define NECP_KERNEL_CONDITION_LOCAL_END 0x00010
-#define NECP_KERNEL_CONDITION_LOCAL_PREFIX 0x00020
-#define NECP_KERNEL_CONDITION_REMOTE_START 0x00040
-#define NECP_KERNEL_CONDITION_REMOTE_END 0x00080
-#define NECP_KERNEL_CONDITION_REMOTE_PREFIX 0x00100
-#define NECP_KERNEL_CONDITION_APP_ID 0x00200
-#define NECP_KERNEL_CONDITION_REAL_APP_ID 0x00400
-#define NECP_KERNEL_CONDITION_DOMAIN 0x00800
-#define NECP_KERNEL_CONDITION_ACCOUNT_ID 0x01000
-#define NECP_KERNEL_CONDITION_POLICY_ID 0x02000
-#define NECP_KERNEL_CONDITION_PID 0x04000
-#define NECP_KERNEL_CONDITION_UID 0x08000
-#define NECP_KERNEL_CONDITION_LAST_INTERFACE 0x10000 // Only set from packets looping between interfaces
-#define NECP_KERNEL_CONDITION_TRAFFIC_CLASS 0x20000
-#define NECP_KERNEL_CONDITION_ENTITLEMENT 0x40000
+#define IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(x) ((x) == NECP_ROUTE_RULE_DENY_INTERFACE || (x) == NECP_ROUTE_RULE_ALLOW_INTERFACE)
+
+#define IS_NECP_DEST_IN_LOCAL_NETWORKS(rt) \
+ ((rt) != NULL && !((rt)->rt_flags & RTF_GATEWAY) && ((rt)->rt_ifa && (rt)->rt_ifa->ifa_ifp && !((rt)->rt_ifa->ifa_ifp->if_flags & IFF_POINTOPOINT)))
+
+#define NECP_KERNEL_CONDITION_ALL_INTERFACES 0x000001
+#define NECP_KERNEL_CONDITION_BOUND_INTERFACE 0x000002
+#define NECP_KERNEL_CONDITION_PROTOCOL 0x000004
+#define NECP_KERNEL_CONDITION_LOCAL_START 0x000008
+#define NECP_KERNEL_CONDITION_LOCAL_END 0x000010
+#define NECP_KERNEL_CONDITION_LOCAL_PREFIX 0x000020
+#define NECP_KERNEL_CONDITION_REMOTE_START 0x000040
+#define NECP_KERNEL_CONDITION_REMOTE_END 0x000080
+#define NECP_KERNEL_CONDITION_REMOTE_PREFIX 0x000100
+#define NECP_KERNEL_CONDITION_APP_ID 0x000200
+#define NECP_KERNEL_CONDITION_REAL_APP_ID 0x000400
+#define NECP_KERNEL_CONDITION_DOMAIN 0x000800
+#define NECP_KERNEL_CONDITION_ACCOUNT_ID 0x001000
+#define NECP_KERNEL_CONDITION_POLICY_ID 0x002000
+#define NECP_KERNEL_CONDITION_PID 0x004000
+#define NECP_KERNEL_CONDITION_UID 0x008000
+#define NECP_KERNEL_CONDITION_LAST_INTERFACE 0x010000 // Only set from packets looping between interfaces
+#define NECP_KERNEL_CONDITION_TRAFFIC_CLASS 0x020000
+#define NECP_KERNEL_CONDITION_ENTITLEMENT 0x040000
+#define NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT 0x080000
+#define NECP_KERNEL_CONDITION_AGENT_TYPE 0x100000
+#define NECP_KERNEL_CONDITION_HAS_CLIENT 0x200000
+#define NECP_KERNEL_CONDITION_LOCAL_NETWORKS 0x400000
+#define NECP_KERNEL_CONDITION_CLIENT_FLAGS 0x800000
+#define NECP_KERNEL_CONDITION_LOCAL_EMPTY 0x1000000
+#define NECP_KERNEL_CONDITION_REMOTE_EMPTY 0x2000000
+#define NECP_KERNEL_CONDITION_PLATFORM_BINARY 0x4000000
+#define NECP_KERNEL_CONDITION_SDK_VERSION 0x8000000
+#define NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER 0x10000000
+#define NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS 0x20000000
+#define NECP_KERNEL_CONDITION_IS_LOOPBACK 0x40000000
+
+#define NECP_MAX_POLICY_RESULT_SIZE 512
+#define NECP_MAX_ROUTE_RULES_ARRAY_SIZE 1024
+#define NECP_MAX_CONDITIONS_ARRAY_SIZE 4096
+#define NECP_MAX_POLICY_LIST_COUNT 1024
+
+typedef enum {
+ NECP_BYPASS_TYPE_NONE = 0,
+ NECP_BYPASS_TYPE_INTCOPROC = 1,
+ NECP_BYPASS_TYPE_LOOPBACK = 2,
+} necp_socket_bypass_type_t;
+
+// Cap the policy size at the max result + conditions size, with room for extra TLVs
+#define NECP_MAX_POLICY_SIZE (1024 + NECP_MAX_POLICY_RESULT_SIZE + NECP_MAX_CONDITIONS_ARRAY_SIZE)
struct necp_service_registration {
- LIST_ENTRY(necp_service_registration) session_chain;
- LIST_ENTRY(necp_service_registration) kernel_chain;
- u_int32_t service_id;
+ LIST_ENTRY(necp_service_registration) session_chain;
+ LIST_ENTRY(necp_service_registration) kernel_chain;
+ u_int32_t service_id;
};
struct necp_session {
- u_int32_t control_unit;
- u_int32_t session_priority; // Descriptive priority rating
- u_int32_t session_order;
+ u_int8_t necp_fd_type;
+ u_int32_t control_unit;
+ u_int32_t session_priority; // Descriptive priority rating
+ u_int32_t session_order;
+
+ necp_policy_id last_policy_id;
+
+ decl_lck_mtx_data(, lock);
- bool proc_locked; // Messages must come from proc_uuid
- uuid_t proc_uuid;
- int proc_pid;
+ bool proc_locked; // Messages must come from proc_uuid
+ uuid_t proc_uuid;
+ int proc_pid;
- bool dirty;
+ bool dirty;
LIST_HEAD(_policies, necp_session_policy) policies;
LIST_HEAD(_services, necp_service_registration) services;
+
+ TAILQ_ENTRY(necp_session) chain;
};
+#define NECP_SESSION_LOCK(_s) lck_mtx_lock(&_s->lock)
+#define NECP_SESSION_UNLOCK(_s) lck_mtx_unlock(&_s->lock)
+
+static TAILQ_HEAD(_necp_session_list, necp_session) necp_session_list;
+
struct necp_socket_info {
pid_t pid;
uid_t uid;
u_int32_t application_id;
u_int32_t real_application_id;
u_int32_t account_id;
+ u_int32_t drop_order;
+ u_int32_t client_flags;
char *domain;
errno_t cred_result;
+ unsigned has_client : 1;
+ unsigned is_platform_binary : 1;
+ unsigned used_responsible_pid : 1;
+ unsigned is_loopback : 1;
+ unsigned __pad_bits : 4;
};
-static kern_ctl_ref necp_kctlref;
-static u_int32_t necp_family;
-static OSMallocTag necp_malloc_tag;
-static lck_grp_attr_t *necp_kernel_policy_grp_attr = NULL;
-static lck_attr_t *necp_kernel_policy_mtx_attr = NULL;
-static lck_grp_t *necp_kernel_policy_mtx_grp = NULL;
+static lck_grp_attr_t *necp_kernel_policy_grp_attr = NULL;
+static lck_attr_t *necp_kernel_policy_mtx_attr = NULL;
+static lck_grp_t *necp_kernel_policy_mtx_grp = NULL;
decl_lck_rw_data(static, necp_kernel_policy_lock);
-static lck_grp_attr_t *necp_route_rule_grp_attr = NULL;
-static lck_attr_t *necp_route_rule_mtx_attr = NULL;
-static lck_grp_t *necp_route_rule_mtx_grp = NULL;
+static lck_grp_attr_t *necp_route_rule_grp_attr = NULL;
+static lck_attr_t *necp_route_rule_mtx_attr = NULL;
+static lck_grp_t *necp_route_rule_mtx_grp = NULL;
decl_lck_rw_data(static, necp_route_rule_lock);
-static necp_policy_id necp_last_policy_id = 0;
-static necp_kernel_policy_id necp_last_kernel_policy_id = 0;
-static u_int32_t necp_last_uuid_id = 0;
-static u_int32_t necp_last_string_id = 0;
-static u_int32_t necp_last_route_rule_id = 0;
-static u_int32_t necp_last_aggregate_route_rule_id = 0;
+os_refgrp_decl(static, necp_refgrp, "NECPRefGroup", NULL);
/*
* On modification, invalidate cached lookups by bumping the generation count.
* the subsystem lock.
*/
static volatile int32_t necp_kernel_socket_policies_gencount;
-#define BUMP_KERNEL_SOCKET_POLICIES_GENERATION_COUNT() do { \
- if (OSIncrementAtomic(&necp_kernel_socket_policies_gencount) == (INT32_MAX - 1)) { \
- necp_kernel_socket_policies_gencount = 1; \
- } \
+#define BUMP_KERNEL_SOCKET_POLICIES_GENERATION_COUNT() do { \
+ if (OSIncrementAtomic(&necp_kernel_socket_policies_gencount) == (INT32_MAX - 1)) { \
+ necp_kernel_socket_policies_gencount = 1; \
+ } \
} while (0)
+/*
+ * Drop-all Bypass:
+ * Allow priviledged processes to bypass the default drop-all
+ * via entitlement check. For OSX, since entitlement check is
+ * not supported for configd, configd signing identity is checked
+ * instead.
+ */
+#define SIGNING_ID_CONFIGD "com.apple.configd"
+#define SIGNING_ID_CONFIGD_LEN (sizeof(SIGNING_ID_CONFIGD) - 1)
+
+typedef enum {
+ NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE = 0,
+ NECP_DROP_ALL_BYPASS_CHECK_RESULT_TRUE = 1,
+ NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE = 2,
+} necp_drop_all_bypass_check_result_t;
+
static u_int32_t necp_kernel_application_policies_condition_mask;
static size_t necp_kernel_application_policies_count;
static u_int32_t necp_kernel_socket_policies_condition_mask;
static size_t necp_kernel_socket_policies_count;
static size_t necp_kernel_socket_policies_non_app_count;
static LIST_HEAD(_necpkernelsocketconnectpolicies, necp_kernel_socket_policy) necp_kernel_socket_policies;
-#define NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS 5
-#define NECP_SOCKET_MAP_APP_ID_TO_BUCKET(appid) (appid ? (appid%(NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS - 1) + 1) : 0)
+#define NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS 5
+#define NECP_SOCKET_MAP_APP_ID_TO_BUCKET(appid) (appid ? (appid%(NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS - 1) + 1) : 0)
static struct necp_kernel_socket_policy **necp_kernel_socket_policies_map[NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS];
static struct necp_kernel_socket_policy **necp_kernel_socket_policies_app_layer_map;
/*
static size_t necp_kernel_ip_output_policies_count;
static size_t necp_kernel_ip_output_policies_non_id_count;
static LIST_HEAD(_necpkernelipoutputpolicies, necp_kernel_ip_output_policy) necp_kernel_ip_output_policies;
-#define NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS 5
-#define NECP_IP_OUTPUT_MAP_ID_TO_BUCKET(id) (id ? (id%(NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS - 1) + 1) : 0)
+#define NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS 5
+#define NECP_IP_OUTPUT_MAP_ID_TO_BUCKET(id) (id ? (id%(NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS - 1) + 1) : 0)
static struct necp_kernel_ip_output_policy **necp_kernel_ip_output_policies_map[NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS];
+static struct necp_kernel_socket_policy pass_policy =
+{
+ .id = NECP_KERNEL_POLICY_ID_NO_MATCH,
+ .result = NECP_KERNEL_POLICY_RESULT_PASS,
+};
-static struct necp_session *necp_create_session(u_int32_t control_unit);
+static struct necp_session *necp_create_session(void);
static void necp_delete_session(struct necp_session *session);
-static void necp_handle_policy_add(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset);
-static void necp_handle_policy_get(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset);
-static void necp_handle_policy_delete(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset);
-static void necp_handle_policy_apply_all(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset);
-static void necp_handle_policy_list_all(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset);
-static void necp_handle_policy_delete_all(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset);
-static void necp_handle_set_session_priority(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset);
-static void necp_handle_lock_session_to_proc(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset);
-static void necp_handle_register_service(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset);
-static void necp_handle_unregister_service(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset);
+static necp_policy_id necp_handle_policy_add(struct necp_session *session,
+ u_int8_t *tlv_buffer, size_t tlv_buffer_length, int offset, int *error);
+static int necp_handle_policy_dump_all(user_addr_t out_buffer, size_t out_buffer_length);
+
+#define MAX_RESULT_STRING_LEN 64
+static inline const char * necp_get_result_description(char *result_string, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter);
static struct necp_session_policy *necp_policy_create(struct necp_session *session, necp_policy_order order, u_int8_t *conditions_array, u_int32_t conditions_array_size, u_int8_t *route_rules_array, u_int32_t route_rules_array_size, u_int8_t *result, u_int32_t result_size);
static struct necp_session_policy *necp_policy_find(struct necp_session *session, necp_policy_id policy_id);
static bool necp_policy_delete(struct necp_session *session, struct necp_session_policy *policy);
static void necp_policy_apply_all(struct necp_session *session);
-static necp_kernel_policy_id necp_kernel_socket_policy_add(necp_policy_id parent_policy_id, necp_policy_order order, u_int32_t session_order, int session_pid, u_int32_t condition_mask, u_int32_t condition_negated_mask, necp_app_id cond_app_id, necp_app_id cond_real_app_id, u_int32_t cond_account_id, char *domain, pid_t cond_pid, uid_t cond_uid, ifnet_t cond_bound_interface, struct necp_policy_condition_tc_range cond_traffic_class, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter);
+static necp_kernel_policy_id necp_kernel_socket_policy_add(necp_policy_order order, u_int32_t session_order, int session_pid, u_int32_t condition_mask, u_int32_t condition_negated_mask, necp_app_id cond_app_id, necp_app_id cond_real_app_id, char *cond_custom_entitlement, u_int32_t cond_account_id, char *domain, pid_t cond_pid, uid_t cond_uid, ifnet_t cond_bound_interface, struct necp_policy_condition_tc_range cond_traffic_class, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, struct necp_policy_condition_agent_type *cond_agent_type, struct necp_policy_condition_sdk_version *cond_sdk_version, u_int32_t cond_client_flags, char *cond_signing_identifier, u_int16_t cond_packet_filter_tags, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter);
static bool necp_kernel_socket_policy_delete(necp_kernel_policy_id policy_id);
static bool necp_kernel_socket_policies_reprocess(void);
static bool necp_kernel_socket_policies_update_uuid_table(void);
-static inline struct necp_kernel_socket_policy *necp_socket_find_policy_match_with_info_locked(struct necp_kernel_socket_policy **policy_search_array, struct necp_socket_info *info, necp_kernel_policy_filter *return_filter, u_int32_t *return_route_rule_id, necp_kernel_policy_result *return_service_action, necp_kernel_policy_service *return_service, u_int32_t *return_netagent_array, size_t netagent_array_count);
+static inline struct necp_kernel_socket_policy *necp_socket_find_policy_match_with_info_locked(struct necp_kernel_socket_policy **policy_search_array, struct necp_socket_info *info, necp_kernel_policy_filter *return_filter, u_int32_t *return_route_rule_id_array, size_t *return_route_rule_id_array_count, size_t route_rule_id_array_count, necp_kernel_policy_result *return_service_action, necp_kernel_policy_service *return_service, u_int32_t *return_netagent_array, u_int32_t *return_netagent_use_flags_array, size_t netagent_array_count, struct necp_client_parameter_netagent_type *required_agent_types, u_int32_t num_required_agent_types, proc_t proc, u_int16_t pf_tag, necp_kernel_policy_id *skip_policy_id, struct rtentry *rt, necp_kernel_policy_result *return_drop_dest_policy_result, necp_drop_all_bypass_check_result_t *return_drop_all_bypass, u_int32_t *return_flow_divert_aggregate_unit);
-static necp_kernel_policy_id necp_kernel_ip_output_policy_add(necp_policy_id parent_policy_id, necp_policy_order order, necp_policy_order suborder, u_int32_t session_order, int session_pid, u_int32_t condition_mask, u_int32_t condition_negated_mask, necp_kernel_policy_id cond_policy_id, ifnet_t cond_bound_interface, u_int32_t cond_last_interface_index, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter);
+static necp_kernel_policy_id necp_kernel_ip_output_policy_add(necp_policy_order order, necp_policy_order suborder, u_int32_t session_order, int session_pid, u_int32_t condition_mask, u_int32_t condition_negated_mask, necp_kernel_policy_id cond_policy_id, ifnet_t cond_bound_interface, u_int32_t cond_last_interface_index, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, u_int16_t cond_packet_filter_tags, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter);
static bool necp_kernel_ip_output_policy_delete(necp_kernel_policy_id policy_id);
static bool necp_kernel_ip_output_policies_reprocess(void);
static bool necp_is_addr_in_subnet(struct sockaddr *addr, struct sockaddr *subnet_addr, u_int8_t subnet_prefix);
static int necp_addr_compare(struct sockaddr *sa1, struct sockaddr *sa2, int check_port);
static bool necp_buffer_compare_with_bit_prefix(u_int8_t *p1, u_int8_t *p2, u_int32_t bits);
-static bool necp_is_loopback(struct sockaddr *local_addr, struct sockaddr *remote_addr, struct inpcb *inp, struct mbuf *packet);
+static bool necp_addr_is_empty(struct sockaddr *addr);
+static bool necp_is_loopback(struct sockaddr *local_addr, struct sockaddr *remote_addr, struct inpcb *inp, struct mbuf *packet, u_int32_t bound_interface_index);
+static bool necp_is_intcoproc(struct inpcb *inp, struct mbuf *packet);
struct necp_uuid_id_mapping {
LIST_ENTRY(necp_uuid_id_mapping) chain;
- uuid_t uuid;
- u_int32_t id;
- u_int32_t refcount;
- u_int32_t table_refcount; // Add to UUID policy table count
+ uuid_t uuid;
+ u_int32_t id;
+ os_refcnt_t refcount;
+ u_int32_t table_usecount; // Add to UUID policy table count
};
static size_t necp_num_uuid_app_id_mappings;
static bool necp_uuid_app_id_mappings_dirty;
-#define NECP_UUID_APP_ID_HASH_SIZE 64
+#define NECP_UUID_APP_ID_HASH_SIZE 64
static u_long necp_uuid_app_id_hash_mask;
static u_long necp_uuid_app_id_hash_num_buckets;
-static LIST_HEAD(necp_uuid_id_mapping_head, necp_uuid_id_mapping) *necp_uuid_app_id_hashtbl, necp_uuid_service_id_list; // App map is real hash table, service map is just mapping
-#define APPUUIDHASH(uuid) (&necp_uuid_app_id_hashtbl[uuid[0] & necp_uuid_app_id_hash_mask]) // Assume first byte of UUIDs are evenly distributed
+static LIST_HEAD(necp_uuid_id_mapping_head, necp_uuid_id_mapping) * necp_uuid_app_id_hashtbl, necp_uuid_service_id_list; // App map is real hash table, service map is just mapping
+#define APPUUIDHASH(uuid) (&necp_uuid_app_id_hashtbl[uuid[0] & necp_uuid_app_id_hash_mask]) // Assume first byte of UUIDs are evenly distributed
static u_int32_t necp_create_uuid_app_id_mapping(uuid_t uuid, bool *allocated_mapping, bool uuid_policy_table);
static bool necp_remove_uuid_app_id_mapping(uuid_t uuid, bool *removed_mapping, bool uuid_policy_table);
+static struct necp_uuid_id_mapping *necp_uuid_lookup_uuid_with_app_id_locked(u_int32_t local_id);
static struct necp_uuid_id_mapping *necp_uuid_lookup_service_id_locked(uuid_t uuid);
static struct necp_uuid_id_mapping *necp_uuid_lookup_uuid_with_service_id_locked(u_int32_t local_id);
struct necp_string_id_mapping {
LIST_ENTRY(necp_string_id_mapping) chain;
- char *string;
- necp_app_id id;
- u_int32_t refcount;
+ char *string;
+ necp_app_id id;
+ os_refcnt_t refcount;
};
static LIST_HEAD(necp_string_id_mapping_list, necp_string_id_mapping) necp_account_id_list;
static u_int32_t necp_create_string_to_id_mapping(struct necp_string_id_mapping_list *list, char *domain);
static bool necp_remove_string_to_id_mapping(struct necp_string_id_mapping_list *list, char *domain);
+static struct necp_string_id_mapping *necp_lookup_string_with_id_locked(struct necp_string_id_mapping_list *list, u_int32_t local_id);
+
+static struct necp_kernel_socket_policy *necp_kernel_socket_policy_find(necp_kernel_policy_id policy_id);
+static struct necp_kernel_ip_output_policy *necp_kernel_ip_output_policy_find(necp_kernel_policy_id policy_id);
static LIST_HEAD(_necp_kernel_service_list, necp_service_registration) necp_registered_service_list;
static char *necp_create_trimmed_domain(char *string, size_t length);
static inline int necp_count_dots(char *string, size_t length);
+static char *necp_copy_string(char *string, size_t length);
+static bool necp_update_qos_marking(struct ifnet *ifp, u_int32_t route_rule_id);
+
#define ROUTE_RULE_IS_AGGREGATE(ruleid) (ruleid > UINT16_MAX)
#define MAX_ROUTE_RULE_INTERFACES 10
struct necp_route_rule {
LIST_ENTRY(necp_route_rule) chain;
- u_int32_t id;
- u_int32_t default_action;
- u_int8_t cellular_action;
- u_int8_t wifi_action;
- u_int8_t wired_action;
- u_int8_t expensive_action;
- u_int exception_if_indices[MAX_ROUTE_RULE_INTERFACES];
- u_int8_t exception_if_actions[MAX_ROUTE_RULE_INTERFACES];
- u_int32_t refcount;
+ u_int32_t id;
+ u_int32_t default_action;
+ u_int8_t cellular_action;
+ u_int8_t wifi_action;
+ u_int8_t wired_action;
+ u_int8_t expensive_action;
+ u_int8_t constrained_action;
+ u_int exception_if_indices[MAX_ROUTE_RULE_INTERFACES];
+ u_int8_t exception_if_actions[MAX_ROUTE_RULE_INTERFACES];
+ os_refcnt_t refcount;
};
static LIST_HEAD(necp_route_rule_list, necp_route_rule) necp_route_rules;
static u_int32_t necp_create_route_rule(struct necp_route_rule_list *list, u_int8_t *route_rules_array, u_int32_t route_rules_array_size);
static bool necp_remove_route_rule(struct necp_route_rule_list *list, u_int32_t route_rule_id);
-static bool necp_route_is_allowed(struct rtentry *route, ifnet_t interface, u_int32_t route_rule_id, bool *cellular_denied);
+static bool necp_route_is_allowed(struct rtentry *route, ifnet_t interface, u_int32_t route_rule_id, u_int32_t *interface_type_denied);
static struct necp_route_rule *necp_lookup_route_rule_locked(struct necp_route_rule_list *list, u_int32_t route_rule_id);
+static inline void necp_get_parent_cred_result(proc_t proc, struct necp_socket_info *info);
#define MAX_AGGREGATE_ROUTE_RULES 16
struct necp_aggregate_route_rule {
LIST_ENTRY(necp_aggregate_route_rule) chain;
- u_int32_t id;
- u_int32_t rule_ids[MAX_AGGREGATE_ROUTE_RULES];
+ u_int32_t id;
+ u_int32_t rule_ids[MAX_AGGREGATE_ROUTE_RULES];
};
static LIST_HEAD(necp_aggregate_route_rule_list, necp_aggregate_route_rule) necp_aggregate_route_rules;
static u_int32_t necp_create_aggregate_route_rule(u_int32_t *rule_ids);
// Sysctl definitions
static int sysctl_handle_necp_level SYSCTL_HANDLER_ARGS;
+static int sysctl_handle_necp_unentitled_level SYSCTL_HANDLER_ARGS;
SYSCTL_NODE(_net, OID_AUTO, necp, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "NECP");
+SYSCTL_INT(_net_necp, NECPCTL_DEDUP_POLICIES, dedup_policies, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_dedup_policies, 0, "");
+SYSCTL_INT(_net_necp, NECPCTL_RESTRICT_MULTICAST, restrict_multicast, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_restrict_multicast, 0, "");
SYSCTL_INT(_net_necp, NECPCTL_PASS_LOOPBACK, pass_loopback, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_pass_loopback, 0, "");
SYSCTL_INT(_net_necp, NECPCTL_PASS_KEEPALIVES, pass_keepalives, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_pass_keepalives, 0, "");
+SYSCTL_INT(_net_necp, NECPCTL_PASS_INTERPOSE, pass_interpose, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_pass_interpose, 0, "");
SYSCTL_INT(_net_necp, NECPCTL_DEBUG, debug, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_debug, 0, "");
+SYSCTL_PROC(_net_necp, NECPCTL_DROP_UNENTITLED_LEVEL, drop_unentitled_level, CTLTYPE_INT | CTLFLAG_LOCKED | CTLFLAG_RW, &necp_drop_unentitled_level, 0, &sysctl_handle_necp_unentitled_level, "IU", "");
SYSCTL_PROC(_net_necp, NECPCTL_DROP_ALL_LEVEL, drop_all_level, CTLTYPE_INT | CTLFLAG_LOCKED | CTLFLAG_RW, &necp_drop_all_level, 0, &sysctl_handle_necp_level, "IU", "");
SYSCTL_LONG(_net_necp, NECPCTL_SOCKET_POLICY_COUNT, socket_policy_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_kernel_socket_policies_count, "");
SYSCTL_LONG(_net_necp, NECPCTL_SOCKET_NON_APP_POLICY_COUNT, socket_non_app_policy_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_kernel_socket_policies_non_app_count, "");
SYSCTL_LONG(_net_necp, NECPCTL_IP_POLICY_COUNT, ip_policy_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_kernel_ip_output_policies_count, "");
SYSCTL_INT(_net_necp, NECPCTL_SESSION_COUNT, session_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_session_count, 0, "");
+static struct necp_drop_dest_policy necp_drop_dest_policy;
+static int necp_drop_dest_debug = 0; // 0: off, 1: match, >1: every evaluation
+SYSCTL_INT(_net_necp, OID_AUTO, drop_dest_debug, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_drop_dest_debug, 0, "");
+
+static int sysctl_handle_necp_drop_dest_level SYSCTL_HANDLER_ARGS;
+SYSCTL_PROC(_net_necp, OID_AUTO, drop_dest_level, CTLTYPE_STRUCT | CTLFLAG_LOCKED | CTLFLAG_ANYBODY | CTLFLAG_RW,
+ 0, 0, &sysctl_handle_necp_drop_dest_level, "S,necp_drop_dest_level", "");
+
+static bool necp_address_matches_drop_dest_policy(union necp_sockaddr_union *, u_int32_t);
+
// Session order allocation
static u_int32_t
necp_allocate_new_session_order(u_int32_t priority, u_int32_t control_unit)
// Use the control unit to decide the offset into the priority list
new_order = (control_unit) + ((priority - 1) * 1000);
- return (new_order);
+ return new_order;
}
static inline u_int32_t
necp_get_first_order_for_priority(u_int32_t priority)
{
- return (((priority - 1) * 1000) + 1);
+ if (priority == 0) {
+ return 0;
+ }
+ return ((priority - 1) * 1000) + 1;
}
// Sysctl handler
{
#pragma unused(arg1, arg2)
int error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
- if (necp_drop_all_level == 0) {
- necp_drop_all_order = 0;
+ necp_drop_all_order = necp_get_first_order_for_priority(necp_drop_all_level);
+ return error;
+}
+
+static int
+sysctl_handle_necp_unentitled_level SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+ int error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
+ necp_drop_unentitled_order = necp_get_first_order_for_priority(necp_drop_unentitled_level);
+ return error;
+}
+
+// Use a macro here to avoid computing the kauth_cred_t when necp_drop_unentitled_level is 0
+static inline u_int32_t
+_necp_process_drop_order_inner(kauth_cred_t cred)
+{
+ if (priv_check_cred(cred, PRIV_NET_PRIVILEGED_CLIENT_ACCESS, 0) != 0 &&
+ priv_check_cred(cred, PRIV_NET_PRIVILEGED_SERVER_ACCESS, 0) != 0) {
+ return necp_drop_unentitled_order;
} else {
- necp_drop_all_order = necp_get_first_order_for_priority(necp_drop_all_level);
+ return 0;
}
- return (error);
}
+#define necp_process_drop_order(_cred) (necp_drop_unentitled_order != 0 ? _necp_process_drop_order_inner(_cred) : necp_drop_unentitled_order)
+#pragma GCC poison _necp_process_drop_order_inner
-// Kernel Control functions
-static errno_t necp_register_control(void);
-static errno_t necp_ctl_connect(kern_ctl_ref kctlref, struct sockaddr_ctl *sac, void **unitinfo);
-static errno_t necp_ctl_disconnect(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo);
-static errno_t necp_ctl_send(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, mbuf_t m, int flags);
-static void necp_ctl_rcvd(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, int flags);
-static errno_t necp_ctl_getopt(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, int opt, void *data, size_t *len);
-static errno_t necp_ctl_setopt(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, int opt, void *data, size_t len);
+// Session fd
-static bool necp_send_ctl_data(struct necp_session *session, u_int8_t *buffer, size_t buffer_size);
+static int necp_session_op_close(struct fileglob *, vfs_context_t);
-errno_t
-necp_init(void)
-{
- errno_t result = 0;
+static const struct fileops necp_session_fd_ops = {
+ .fo_type = DTYPE_NETPOLICY,
+ .fo_read = fo_no_read,
+ .fo_write = fo_no_write,
+ .fo_ioctl = fo_no_ioctl,
+ .fo_select = fo_no_select,
+ .fo_close = necp_session_op_close,
+ .fo_drain = fo_no_drain,
+ .fo_kqfilter = fo_no_kqfilter,
+};
- result = necp_register_control();
- if (result != 0) {
- goto done;
- }
+static inline int
+necp_is_platform_binary(proc_t proc)
+{
+ return (proc != NULL) ? (csproc_get_platform_binary(proc) && cs_valid(proc)) : 0;
+}
- necp_kernel_policy_grp_attr = lck_grp_attr_alloc_init();
- if (necp_kernel_policy_grp_attr == NULL) {
- NECPLOG0(LOG_ERR, "lck_grp_attr_alloc_init failed");
- result = ENOMEM;
- goto done;
+static inline necp_drop_all_bypass_check_result_t
+necp_check_drop_all_bypass_result(proc_t proc)
+{
+ if (proc == NULL) {
+ proc = current_proc();
+ if (proc == NULL) {
+ return NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE;
+ }
}
- necp_kernel_policy_mtx_grp = lck_grp_alloc_init(NECP_CONTROL_NAME, necp_kernel_policy_grp_attr);
- if (necp_kernel_policy_mtx_grp == NULL) {
- NECPLOG0(LOG_ERR, "lck_grp_alloc_init failed");
- result = ENOMEM;
- goto done;
+#if defined(XNU_TARGET_OS_OSX)
+ const char *signing_id = NULL;
+ const bool isConfigd = (necp_is_platform_binary(proc) &&
+ (signing_id = cs_identity_get(proc)) &&
+ (strlen(signing_id) == SIGNING_ID_CONFIGD_LEN) &&
+ (memcmp(signing_id, SIGNING_ID_CONFIGD, SIGNING_ID_CONFIGD_LEN) == 0));
+ if (isConfigd) {
+ return NECP_DROP_ALL_BYPASS_CHECK_RESULT_TRUE;
}
+#endif
- necp_kernel_policy_mtx_attr = lck_attr_alloc_init();
- if (necp_kernel_policy_mtx_attr == NULL) {
- NECPLOG0(LOG_ERR, "lck_attr_alloc_init failed");
- result = ENOMEM;
- goto done;
+ const task_t task = proc_task(proc);
+ if (task == NULL || !IOTaskHasEntitlement(task, "com.apple.private.necp.drop_all_bypass")) {
+ return NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE;
+ } else {
+ return NECP_DROP_ALL_BYPASS_CHECK_RESULT_TRUE;
}
+}
- lck_rw_init(&necp_kernel_policy_lock, necp_kernel_policy_mtx_grp, necp_kernel_policy_mtx_attr);
-
- necp_route_rule_grp_attr = lck_grp_attr_alloc_init();
- if (necp_route_rule_grp_attr == NULL) {
- NECPLOG0(LOG_ERR, "lck_grp_attr_alloc_init failed");
- result = ENOMEM;
+int
+necp_session_open(struct proc *p, struct necp_session_open_args *uap, int *retval)
+{
+#pragma unused(uap)
+ int error = 0;
+ struct necp_session *session = NULL;
+ struct fileproc *fp = NULL;
+ int fd = -1;
+
+ uid_t uid = kauth_cred_getuid(proc_ucred(p));
+ if (uid != 0 && priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_NECP_POLICIES, 0) != 0) {
+ NECPLOG0(LOG_ERR, "Process does not hold necessary entitlement to open NECP session");
+ error = EACCES;
goto done;
}
- necp_route_rule_mtx_grp = lck_grp_alloc_init("necp_route_rule", necp_route_rule_grp_attr);
- if (necp_route_rule_mtx_grp == NULL) {
- NECPLOG0(LOG_ERR, "lck_grp_alloc_init failed");
- result = ENOMEM;
+ error = falloc(p, &fp, &fd, vfs_context_current());
+ if (error != 0) {
goto done;
}
- necp_route_rule_mtx_attr = lck_attr_alloc_init();
- if (necp_route_rule_mtx_attr == NULL) {
- NECPLOG0(LOG_ERR, "lck_attr_alloc_init failed");
- result = ENOMEM;
+ session = necp_create_session();
+ if (session == NULL) {
+ error = ENOMEM;
goto done;
}
- lck_rw_init(&necp_route_rule_lock, necp_route_rule_mtx_grp, necp_route_rule_mtx_attr);
-
- LIST_INIT(&necp_kernel_socket_policies);
- LIST_INIT(&necp_kernel_ip_output_policies);
-
- LIST_INIT(&necp_account_id_list);
-
- LIST_INIT(&necp_uuid_service_id_list);
-
- LIST_INIT(&necp_registered_service_list);
-
- LIST_INIT(&necp_route_rules);
- LIST_INIT(&necp_aggregate_route_rules);
-
- necp_uuid_app_id_hashtbl = hashinit(NECP_UUID_APP_ID_HASH_SIZE, M_NECP, &necp_uuid_app_id_hash_mask);
- necp_uuid_app_id_hash_num_buckets = necp_uuid_app_id_hash_mask + 1;
- necp_num_uuid_app_id_mappings = 0;
- necp_uuid_app_id_mappings_dirty = FALSE;
-
- necp_kernel_application_policies_condition_mask = 0;
- necp_kernel_socket_policies_condition_mask = 0;
- necp_kernel_ip_output_policies_condition_mask = 0;
-
- necp_kernel_application_policies_count = 0;
- necp_kernel_socket_policies_count = 0;
- necp_kernel_socket_policies_non_app_count = 0;
- necp_kernel_ip_output_policies_count = 0;
- necp_kernel_ip_output_policies_non_id_count = 0;
-
- necp_last_policy_id = 0;
- necp_last_kernel_policy_id = 0;
- necp_last_uuid_id = 0;
- necp_last_string_id = 0;
- necp_last_route_rule_id = 0;
- necp_last_aggregate_route_rule_id = 0;
-
- necp_kernel_socket_policies_gencount = 1;
+ fp->fp_glob->fg_flag = 0;
+ fp->fp_glob->fg_ops = &necp_session_fd_ops;
+ fp->fp_glob->fg_data = session;
- memset(&necp_kernel_socket_policies_map, 0, sizeof(necp_kernel_socket_policies_map));
- memset(&necp_kernel_ip_output_policies_map, 0, sizeof(necp_kernel_ip_output_policies_map));
- necp_kernel_socket_policies_app_layer_map = NULL;
+ proc_fdlock(p);
+ FDFLAGS_SET(p, fd, (UF_EXCLOSE | UF_FORKCLOSE));
+ procfdtbl_releasefd(p, fd, NULL);
+ fp_drop(p, fd, fp, 1);
+ proc_fdunlock(p);
+ *retval = fd;
done:
- if (result != 0) {
- if (necp_kernel_policy_mtx_attr != NULL) {
- lck_attr_free(necp_kernel_policy_mtx_attr);
- necp_kernel_policy_mtx_attr = NULL;
- }
- if (necp_kernel_policy_mtx_grp != NULL) {
- lck_grp_free(necp_kernel_policy_mtx_grp);
- necp_kernel_policy_mtx_grp = NULL;
- }
- if (necp_kernel_policy_grp_attr != NULL) {
- lck_grp_attr_free(necp_kernel_policy_grp_attr);
- necp_kernel_policy_grp_attr = NULL;
- }
- if (necp_route_rule_mtx_attr != NULL) {
- lck_attr_free(necp_route_rule_mtx_attr);
- necp_route_rule_mtx_attr = NULL;
- }
- if (necp_route_rule_mtx_grp != NULL) {
- lck_grp_free(necp_route_rule_mtx_grp);
- necp_route_rule_mtx_grp = NULL;
- }
- if (necp_route_rule_grp_attr != NULL) {
- lck_grp_attr_free(necp_route_rule_grp_attr);
- necp_route_rule_grp_attr = NULL;
- }
- if (necp_kctlref != NULL) {
- ctl_deregister(necp_kctlref);
- necp_kctlref = NULL;
+ if (error != 0) {
+ if (fp != NULL) {
+ fp_free(p, fd, fp);
+ fp = NULL;
}
}
- return (result);
+
+ return error;
}
-static errno_t
-necp_register_control(void)
+static int
+necp_session_op_close(struct fileglob *fg, vfs_context_t ctx)
{
- struct kern_ctl_reg kern_ctl;
- errno_t result = 0;
+#pragma unused(ctx)
+ struct necp_session *session = (struct necp_session *)fg->fg_data;
+ fg->fg_data = NULL;
- // Create a tag to allocate memory
- necp_malloc_tag = OSMalloc_Tagalloc(NECP_CONTROL_NAME, OSMT_DEFAULT);
+ if (session != NULL) {
+ necp_policy_mark_all_for_deletion(session);
+ necp_policy_apply_all(session);
+ necp_delete_session(session);
+ return 0;
+ } else {
+ return ENOENT;
+ }
+}
- // Find a unique value for our interface family
- result = mbuf_tag_id_find(NECP_CONTROL_NAME, &necp_family);
- if (result != 0) {
- NECPLOG(LOG_ERR, "mbuf_tag_id_find_internal failed: %d", result);
- return (result);
- }
-
- bzero(&kern_ctl, sizeof(kern_ctl));
- strlcpy(kern_ctl.ctl_name, NECP_CONTROL_NAME, sizeof(kern_ctl.ctl_name));
- kern_ctl.ctl_name[sizeof(kern_ctl.ctl_name) - 1] = 0;
- kern_ctl.ctl_flags = CTL_FLAG_PRIVILEGED; // Require root
- kern_ctl.ctl_sendsize = 64 * 1024;
- kern_ctl.ctl_recvsize = 64 * 1024;
- kern_ctl.ctl_connect = necp_ctl_connect;
- kern_ctl.ctl_disconnect = necp_ctl_disconnect;
- kern_ctl.ctl_send = necp_ctl_send;
- kern_ctl.ctl_rcvd = necp_ctl_rcvd;
- kern_ctl.ctl_setopt = necp_ctl_setopt;
- kern_ctl.ctl_getopt = necp_ctl_getopt;
-
- result = ctl_register(&kern_ctl, &necp_kctlref);
- if (result != 0) {
- NECPLOG(LOG_ERR, "ctl_register failed: %d", result);
- return (result);
+static int
+necp_session_find_from_fd(struct proc *p, int fd,
+ struct fileproc **fpp, struct necp_session **session)
+{
+ struct fileproc *fp = NULL;
+ int error = fp_get_ftype(p, fd, DTYPE_NETPOLICY, ENODEV, &fp);
+
+ if (error == 0) {
+ *fpp = fp;
+ *session = (struct necp_session *)fp->fp_glob->fg_data;
+ if ((*session)->necp_fd_type != necp_fd_type_session) {
+ // Not a client fd, ignore
+ fp_drop(p, fd, fp, 0);
+ error = EINVAL;
+ }
}
- return (0);
+ return error;
}
-static void
-necp_post_change_event(struct kev_necp_policies_changed_data *necp_event_data)
+static int
+necp_session_add_policy(struct necp_session *session, struct necp_session_action_args *uap, int *retval)
{
- struct kev_msg ev_msg;
- memset(&ev_msg, 0, sizeof(ev_msg));
+ int error = 0;
+ u_int8_t *tlv_buffer = NULL;
- ev_msg.vendor_code = KEV_VENDOR_APPLE;
- ev_msg.kev_class = KEV_NETWORK_CLASS;
- ev_msg.kev_subclass = KEV_NECP_SUBCLASS;
- ev_msg.event_code = KEV_NECP_POLICIES_CHANGED;
+ if (uap->in_buffer_length == 0 || uap->in_buffer_length > NECP_MAX_POLICY_SIZE || uap->in_buffer == 0) {
+ NECPLOG(LOG_ERR, "necp_session_add_policy invalid input (%zu)", (size_t)uap->in_buffer_length);
+ error = EINVAL;
+ goto done;
+ }
- ev_msg.dv[0].data_ptr = necp_event_data;
- ev_msg.dv[0].data_length = sizeof(necp_event_data->changed_count);
- ev_msg.dv[1].data_length = 0;
+ if (uap->out_buffer_length < sizeof(necp_policy_id) || uap->out_buffer == 0) {
+ NECPLOG(LOG_ERR, "necp_session_add_policy invalid output buffer (%zu)", (size_t)uap->out_buffer_length);
+ error = EINVAL;
+ goto done;
+ }
- kev_post_msg(&ev_msg);
-}
+ if ((tlv_buffer = _MALLOC(uap->in_buffer_length, M_NECP, M_WAITOK | M_ZERO)) == NULL) {
+ error = ENOMEM;
+ goto done;
+ }
-static errno_t
-necp_ctl_connect(kern_ctl_ref kctlref, struct sockaddr_ctl *sac, void **unitinfo)
-{
-#pragma unused(kctlref)
- *unitinfo = necp_create_session(sac->sc_unit);
- if (*unitinfo == NULL) {
- // Could not allocate session
- return (ENOBUFS);
+ error = copyin(uap->in_buffer, tlv_buffer, uap->in_buffer_length);
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "necp_session_add_policy tlv copyin error (%d)", error);
+ goto done;
}
- return (0);
-}
+ necp_policy_id new_policy_id = necp_handle_policy_add(session, tlv_buffer, uap->in_buffer_length, 0, &error);
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "necp_session_add_policy failed to add policy (%d)", error);
+ goto done;
+ }
-static errno_t
-necp_ctl_disconnect(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo)
-{
-#pragma unused(kctlref, unit)
- struct necp_session *session = (struct necp_session *)unitinfo;
- if (session != NULL) {
- necp_policy_mark_all_for_deletion(session);
- necp_policy_apply_all(session);
- necp_delete_session((struct necp_session *)unitinfo);
+ error = copyout(&new_policy_id, uap->out_buffer, sizeof(new_policy_id));
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "necp_session_add_policy policy_id copyout error (%d)", error);
+ goto done;
}
- return (0);
-}
+done:
+ if (tlv_buffer != NULL) {
+ FREE(tlv_buffer, M_NECP);
+ tlv_buffer = NULL;
+ }
+ *retval = error;
+ return error;
+}
-// Message handling
static int
-necp_packet_find_tlv(mbuf_t packet, int offset, u_int8_t type, int *err, int next)
+necp_session_get_policy(struct necp_session *session, struct necp_session_action_args *uap, int *retval)
{
- size_t cursor = offset;
- int error = 0;
- u_int32_t curr_length;
- u_int8_t curr_type;
+ int error = 0;
+ u_int8_t *response = NULL;
- *err = 0;
+ if (uap->in_buffer_length < sizeof(necp_policy_id) || uap->in_buffer == 0) {
+ NECPLOG(LOG_ERR, "necp_session_get_policy invalid input (%zu)", (size_t)uap->in_buffer_length);
+ error = EINVAL;
+ goto done;
+ }
- do {
- if (!next) {
- error = mbuf_copydata(packet, cursor, sizeof(curr_type), &curr_type);
- if (error) {
- *err = ENOENT;
- return (-1);
- }
- } else {
- next = 0;
- curr_type = NECP_TLV_NIL;
- }
+ necp_policy_id policy_id = 0;
+ error = copyin(uap->in_buffer, &policy_id, sizeof(policy_id));
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "necp_session_get_policy policy_id copyin error (%d)", error);
+ goto done;
+ }
- if (curr_type != type) {
- cursor += sizeof(curr_type);
- error = mbuf_copydata(packet, cursor, sizeof(curr_length), &curr_length);
- if (error) {
- *err = error;
- return (-1);
- }
- cursor += (sizeof(curr_length) + curr_length);
- }
- } while (curr_type != type);
+ struct necp_session_policy *policy = necp_policy_find(session, policy_id);
+ if (policy == NULL || policy->pending_deletion) {
+ NECPLOG(LOG_ERR, "Failed to find policy with id %d", policy_id);
+ error = ENOENT;
+ goto done;
+ }
- return (cursor);
-}
+ u_int32_t order_tlv_size = sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(necp_policy_order);
+ u_int32_t result_tlv_size = (policy->result_size ? (sizeof(u_int8_t) + sizeof(u_int32_t) + policy->result_size) : 0);
+ u_int32_t response_size = order_tlv_size + result_tlv_size + policy->conditions_size;
-static int
-necp_packet_get_tlv_at_offset(mbuf_t packet, int tlv_offset, u_int32_t buff_len, void *buff, u_int32_t *value_size)
-{
- int error = 0;
- u_int32_t length;
+ if (uap->out_buffer_length < response_size || uap->out_buffer == 0) {
+ NECPLOG(LOG_ERR, "necp_session_get_policy buffer not large enough (%zu < %u)", (size_t)uap->out_buffer_length, response_size);
+ error = EINVAL;
+ goto done;
+ }
- if (tlv_offset < 0) {
- return (error);
+ if (response_size > NECP_MAX_POLICY_SIZE) {
+ NECPLOG(LOG_ERR, "necp_session_get_policy size too large to copy (%u)", response_size);
+ error = EINVAL;
+ goto done;
}
- error = mbuf_copydata(packet, tlv_offset + sizeof(u_int8_t), sizeof(length), &length);
- if (error) {
- return (error);
+ MALLOC(response, u_int8_t *, response_size, M_NECP, M_WAITOK | M_ZERO);
+ if (response == NULL) {
+ error = ENOMEM;
+ goto done;
}
- if (value_size != NULL) {
- *value_size = length;
+ u_int8_t *cursor = response;
+ cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_ORDER, sizeof(necp_policy_order), &policy->order, response, response_size);
+ if (result_tlv_size) {
+ cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_RESULT, policy->result_size, &policy->result, response, response_size);
+ }
+ if (policy->conditions_size) {
+ memcpy(((u_int8_t *)(void *)(cursor)), policy->conditions, policy->conditions_size);
}
- if (buff != NULL && buff_len > 0) {
- u_int32_t to_copy = (length < buff_len) ? length : buff_len;
- error = mbuf_copydata(packet, tlv_offset + sizeof(u_int8_t) + sizeof(length), to_copy, buff);
- if (error) {
- return (error);
- }
+ error = copyout(response, uap->out_buffer, response_size);
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "necp_session_get_policy TLV copyout error (%d)", error);
+ goto done;
+ }
+
+done:
+ if (response != NULL) {
+ FREE(response, M_NECP);
+ response = NULL;
}
+ *retval = error;
- return (0);
+ return error;
}
static int
-necp_packet_get_tlv(mbuf_t packet, int offset, u_int8_t type, u_int32_t buff_len, void *buff, u_int32_t *value_size)
+necp_session_delete_policy(struct necp_session *session, struct necp_session_action_args *uap, int *retval)
{
- int error = 0;
- int tlv_offset;
+ int error = 0;
- tlv_offset = necp_packet_find_tlv(packet, offset, type, &error, 0);
- if (tlv_offset < 0) {
- return (error);
+ if (uap->in_buffer_length < sizeof(necp_policy_id) || uap->in_buffer == 0) {
+ NECPLOG(LOG_ERR, "necp_session_delete_policy invalid input (%zu)", (size_t)uap->in_buffer_length);
+ error = EINVAL;
+ goto done;
+ }
+
+ necp_policy_id delete_policy_id = 0;
+ error = copyin(uap->in_buffer, &delete_policy_id, sizeof(delete_policy_id));
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "necp_session_delete_policy policy_id copyin error (%d)", error);
+ goto done;
+ }
+
+ struct necp_session_policy *policy = necp_policy_find(session, delete_policy_id);
+ if (policy == NULL || policy->pending_deletion) {
+ NECPLOG(LOG_ERR, "necp_session_delete_policy failed to find policy with id %u", delete_policy_id);
+ error = ENOENT;
+ goto done;
}
- return (necp_packet_get_tlv_at_offset(packet, tlv_offset, buff_len, buff, value_size));
+ necp_policy_mark_for_deletion(session, policy);
+done:
+ *retval = error;
+ return error;
}
-static u_int8_t *
-necp_buffer_write_packet_header(u_int8_t *buffer, u_int8_t packet_type, u_int8_t flags, u_int32_t message_id)
+static int
+necp_session_apply_all(struct necp_session *session, struct necp_session_action_args *uap, int *retval)
{
- ((struct necp_packet_header *)(void *)buffer)->packet_type = packet_type;
- ((struct necp_packet_header *)(void *)buffer)->flags = flags;
- ((struct necp_packet_header *)(void *)buffer)->message_id = message_id;
- return (buffer + sizeof(struct necp_packet_header));
+#pragma unused(uap)
+ necp_policy_apply_all(session);
+ *retval = 0;
+ return 0;
}
-static u_int8_t *
-necp_buffer_write_tlv(u_int8_t *buffer, u_int8_t type, u_int32_t length, const void *value)
+static int
+necp_session_list_all(struct necp_session *session, struct necp_session_action_args *uap, int *retval)
{
- *(u_int8_t *)(buffer) = type;
- *(u_int32_t *)(void *)(buffer + sizeof(type)) = length;
- if (length > 0) {
- memcpy((u_int8_t *)(buffer + sizeof(type) + sizeof(length)), value, length);
+ u_int32_t tlv_size = (sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(necp_policy_id));
+ u_int32_t response_size = 0;
+ u_int8_t *response = NULL;
+ int num_policies = 0;
+ int cur_policy_index = 0;
+ int error = 0;
+ struct necp_session_policy *policy;
+
+ LIST_FOREACH(policy, &session->policies, chain) {
+ if (!policy->pending_deletion) {
+ num_policies++;
+ }
}
- return ((u_int8_t *)(buffer + sizeof(type) + sizeof(length) + length));
-}
+ if (num_policies > NECP_MAX_POLICY_LIST_COUNT) {
+ NECPLOG(LOG_ERR, "necp_session_list_all size too large to copy (%u policies)", num_policies);
+ error = EINVAL;
+ goto done;
+ }
-static u_int8_t
-necp_buffer_get_tlv_type(u_int8_t *buffer, int tlv_offset)
-{
- u_int8_t *type = NULL;
+ response_size = num_policies * tlv_size;
+ if (uap->out_buffer_length < response_size || uap->out_buffer == 0) {
+ NECPLOG(LOG_ERR, "necp_session_list_all buffer not large enough (%zu < %u)", (size_t)uap->out_buffer_length, response_size);
+ error = EINVAL;
+ goto done;
+ }
- if (buffer == NULL) {
- return (0);
+ // Create a response with one Policy ID TLV for each policy
+ MALLOC(response, u_int8_t *, response_size, M_NECP, M_WAITOK | M_ZERO);
+ if (response == NULL) {
+ error = ENOMEM;
+ goto done;
}
- type = (u_int8_t *)((u_int8_t *)buffer + tlv_offset);
- return (type ? *type : 0);
+ u_int8_t *cursor = response;
+ LIST_FOREACH(policy, &session->policies, chain) {
+ if (!policy->pending_deletion && cur_policy_index < num_policies) {
+ cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_ID, sizeof(u_int32_t), &policy->local_id, response, response_size);
+ cur_policy_index++;
+ }
+ }
+
+ error = copyout(response, uap->out_buffer, response_size);
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "necp_session_list_all TLV copyout error (%d)", error);
+ goto done;
+ }
+
+done:
+ if (response != NULL) {
+ FREE(response, M_NECP);
+ response = NULL;
+ }
+ *retval = error;
+
+ return error;
}
-static u_int32_t
-necp_buffer_get_tlv_length(u_int8_t *buffer, int tlv_offset)
+
+static int
+necp_session_delete_all(struct necp_session *session, struct necp_session_action_args *uap, int *retval)
{
- u_int32_t *length = NULL;
+#pragma unused(uap)
+ necp_policy_mark_all_for_deletion(session);
+ *retval = 0;
+ return 0;
+}
- if (buffer == NULL) {
- return (0);
+static int
+necp_session_set_session_priority(struct necp_session *session, struct necp_session_action_args *uap, int *retval)
+{
+ int error = 0;
+ struct necp_session_policy *policy = NULL;
+ struct necp_session_policy *temp_policy = NULL;
+
+ if (uap->in_buffer_length < sizeof(necp_session_priority) || uap->in_buffer == 0) {
+ NECPLOG(LOG_ERR, "necp_session_set_session_priority invalid input (%zu)", (size_t)uap->in_buffer_length);
+ error = EINVAL;
+ goto done;
}
- length = (u_int32_t *)(void *)((u_int8_t *)buffer + tlv_offset + sizeof(u_int8_t));
- return (length ? *length : 0);
+ necp_session_priority requested_session_priority = 0;
+ error = copyin(uap->in_buffer, &requested_session_priority, sizeof(requested_session_priority));
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "necp_session_set_session_priority priority copyin error (%d)", error);
+ goto done;
+ }
+
+ // Enforce special session priorities with entitlements
+ if (requested_session_priority == NECP_SESSION_PRIORITY_CONTROL ||
+ requested_session_priority == NECP_SESSION_PRIORITY_PRIVILEGED_TUNNEL ||
+ requested_session_priority == NECP_SESSION_PRIORITY_HIGH_RESTRICTED) {
+ errno_t cred_result = priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_NECP_POLICIES, 0);
+ if (cred_result != 0) {
+ NECPLOG(LOG_ERR, "Session does not hold necessary entitlement to claim priority level %d", requested_session_priority);
+ error = EPERM;
+ goto done;
+ }
+ }
+
+ if (session->session_priority != requested_session_priority) {
+ session->session_priority = requested_session_priority;
+ session->session_order = necp_allocate_new_session_order(session->session_priority, session->control_unit);
+ session->dirty = TRUE;
+
+ // Mark all policies as needing updates
+ LIST_FOREACH_SAFE(policy, &session->policies, chain, temp_policy) {
+ policy->pending_update = TRUE;
+ }
+ }
+
+done:
+ *retval = error;
+ return error;
}
-static u_int8_t *
-necp_buffer_get_tlv_value(u_int8_t *buffer, int tlv_offset, u_int32_t *value_size)
+static int
+necp_session_lock_to_process(struct necp_session *session, struct necp_session_action_args *uap, int *retval)
{
- u_int8_t *value = NULL;
- u_int32_t length = necp_buffer_get_tlv_length(buffer, tlv_offset);
- if (length == 0) {
- return (value);
+#pragma unused(uap)
+ session->proc_locked = TRUE;
+ *retval = 0;
+ return 0;
+}
+
+static int
+necp_session_register_service(struct necp_session *session, struct necp_session_action_args *uap, int *retval)
+{
+ int error = 0;
+ struct necp_service_registration *new_service = NULL;
+
+ if (uap->in_buffer_length < sizeof(uuid_t) || uap->in_buffer == 0) {
+ NECPLOG(LOG_ERR, "necp_session_register_service invalid input (%zu)", (size_t)uap->in_buffer_length);
+ error = EINVAL;
+ goto done;
}
- if (value_size) {
- *value_size = length;
+ uuid_t service_uuid;
+ error = copyin(uap->in_buffer, service_uuid, sizeof(service_uuid));
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "necp_session_register_service uuid copyin error (%d)", error);
+ goto done;
}
- value = (u_int8_t *)((u_int8_t *)buffer + tlv_offset + sizeof(u_int8_t) + sizeof(u_int32_t));
- return (value);
+ MALLOC(new_service, struct necp_service_registration *, sizeof(*new_service), M_NECP, M_WAITOK | M_ZERO);
+ if (new_service == NULL) {
+ NECPLOG0(LOG_ERR, "Failed to allocate service registration");
+ error = ENOMEM;
+ goto done;
+ }
+
+ lck_rw_lock_exclusive(&necp_kernel_policy_lock);
+ new_service->service_id = necp_create_uuid_service_id_mapping(service_uuid);
+ LIST_INSERT_HEAD(&session->services, new_service, session_chain);
+ LIST_INSERT_HEAD(&necp_registered_service_list, new_service, kernel_chain);
+ lck_rw_done(&necp_kernel_policy_lock);
+
+done:
+ *retval = error;
+ return error;
}
static int
-necp_buffer_find_tlv(u_int8_t *buffer, u_int32_t buffer_length, int offset, u_int8_t type, int next)
+necp_session_unregister_service(struct necp_session *session, struct necp_session_action_args *uap, int *retval)
{
- if (offset < 0) {
- return (-1);
+ int error = 0;
+ struct necp_service_registration *service = NULL;
+ struct necp_service_registration *temp_service = NULL;
+ struct necp_uuid_id_mapping *mapping = NULL;
+
+ if (uap->in_buffer_length < sizeof(uuid_t) || uap->in_buffer == 0) {
+ NECPLOG(LOG_ERR, "necp_session_unregister_service invalid input (%zu)", (size_t)uap->in_buffer_length);
+ error = EINVAL;
+ goto done;
}
- int cursor = offset;
- int next_cursor;
- u_int32_t curr_length;
- u_int8_t curr_type;
- while (TRUE) {
- if ((((u_int32_t)cursor) + sizeof(curr_type) + sizeof(curr_length)) > buffer_length) {
- return (-1);
- }
- if (!next) {
- curr_type = necp_buffer_get_tlv_type(buffer, cursor);
- } else {
- next = 0;
- curr_type = NECP_TLV_NIL;
- }
- curr_length = necp_buffer_get_tlv_length(buffer, cursor);
- next_cursor = (cursor + sizeof(curr_type) + sizeof(curr_length) + curr_length);
- if (curr_type == type) {
- // check if entire TLV fits inside buffer
- if (((u_int32_t)next_cursor) <= buffer_length) {
- return (cursor);
- } else {
- return (-1);
+ uuid_t service_uuid;
+ error = copyin(uap->in_buffer, service_uuid, sizeof(service_uuid));
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "necp_session_unregister_service uuid copyin error (%d)", error);
+ goto done;
+ }
+
+ // Remove all matching services for this session
+ lck_rw_lock_exclusive(&necp_kernel_policy_lock);
+ mapping = necp_uuid_lookup_service_id_locked(service_uuid);
+ if (mapping != NULL) {
+ LIST_FOREACH_SAFE(service, &session->services, session_chain, temp_service) {
+ if (service->service_id == mapping->id) {
+ LIST_REMOVE(service, session_chain);
+ LIST_REMOVE(service, kernel_chain);
+ FREE(service, M_NECP);
}
}
- cursor = next_cursor;
+ necp_remove_uuid_service_id_mapping(service_uuid);
}
+ lck_rw_done(&necp_kernel_policy_lock);
+
+done:
+ *retval = error;
+ return error;
}
-static bool
-necp_send_ctl_data(struct necp_session *session, u_int8_t *buffer, size_t buffer_size)
+static int
+necp_session_dump_all(struct necp_session *session, struct necp_session_action_args *uap, int *retval)
{
- int error;
+#pragma unused(session)
+ int error = 0;
- if (necp_kctlref == NULL || session == NULL || buffer == NULL || buffer_size == 0) {
- return (FALSE);
+ if (uap->out_buffer_length == 0 || uap->out_buffer == 0) {
+ NECPLOG(LOG_ERR, "necp_session_dump_all invalid output buffer (%zu)", (size_t)uap->out_buffer_length);
+ error = EINVAL;
+ goto done;
}
- error = ctl_enqueuedata(necp_kctlref, session->control_unit, buffer, buffer_size, CTL_DATA_EOR);
-
- return (error == 0);
+ error = necp_handle_policy_dump_all(uap->out_buffer, uap->out_buffer_length);
+done:
+ *retval = error;
+ return error;
}
-static bool
-necp_send_success_response(struct necp_session *session, u_int8_t packet_type, u_int32_t message_id)
+int
+necp_session_action(struct proc *p, struct necp_session_action_args *uap, int *retval)
{
- bool success = TRUE;
- u_int8_t *response = NULL;
- u_int8_t *cursor = NULL;
- size_t response_size = sizeof(struct necp_packet_header) + sizeof(u_int8_t) + sizeof(u_int32_t);
- MALLOC(response, u_int8_t *, response_size, M_NECP, M_WAITOK);
- if (response == NULL) {
- return (FALSE);
+ struct fileproc *fp;
+ int error = 0;
+ int return_value = 0;
+ struct necp_session *session = NULL;
+
+ error = necp_session_find_from_fd(p, uap->necp_fd, &fp, &session);
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "necp_session_action find fd error (%d)", error);
+ return error;
}
- cursor = response;
- cursor = necp_buffer_write_packet_header(cursor, packet_type, NECP_PACKET_FLAGS_RESPONSE, message_id);
- cursor = necp_buffer_write_tlv(cursor, NECP_TLV_NIL, 0, NULL);
- if (!(success = necp_send_ctl_data(session, (u_int8_t *)response, response_size))) {
- NECPLOG0(LOG_ERR, "Failed to send response");
+ NECP_SESSION_LOCK(session);
+
+ if (session->proc_locked) {
+ // Verify that the calling process is allowed to do actions
+ uuid_t proc_uuid;
+ proc_getexecutableuuid(current_proc(), proc_uuid, sizeof(proc_uuid));
+ if (uuid_compare(proc_uuid, session->proc_uuid) != 0) {
+ error = EPERM;
+ goto done;
+ }
+ } else {
+ // If not locked, update the proc_uuid and proc_pid of the session
+ proc_getexecutableuuid(current_proc(), session->proc_uuid, sizeof(session->proc_uuid));
+ session->proc_pid = proc_pid(current_proc());
+ }
+
+ u_int32_t action = uap->action;
+ switch (action) {
+ case NECP_SESSION_ACTION_POLICY_ADD: {
+ return_value = necp_session_add_policy(session, uap, retval);
+ break;
+ }
+ case NECP_SESSION_ACTION_POLICY_GET: {
+ return_value = necp_session_get_policy(session, uap, retval);
+ break;
+ }
+ case NECP_SESSION_ACTION_POLICY_DELETE: {
+ return_value = necp_session_delete_policy(session, uap, retval);
+ break;
+ }
+ case NECP_SESSION_ACTION_POLICY_APPLY_ALL: {
+ return_value = necp_session_apply_all(session, uap, retval);
+ break;
+ }
+ case NECP_SESSION_ACTION_POLICY_LIST_ALL: {
+ return_value = necp_session_list_all(session, uap, retval);
+ break;
+ }
+ case NECP_SESSION_ACTION_POLICY_DELETE_ALL: {
+ return_value = necp_session_delete_all(session, uap, retval);
+ break;
+ }
+ case NECP_SESSION_ACTION_SET_SESSION_PRIORITY: {
+ return_value = necp_session_set_session_priority(session, uap, retval);
+ break;
+ }
+ case NECP_SESSION_ACTION_LOCK_SESSION_TO_PROC: {
+ return_value = necp_session_lock_to_process(session, uap, retval);
+ break;
+ }
+ case NECP_SESSION_ACTION_REGISTER_SERVICE: {
+ return_value = necp_session_register_service(session, uap, retval);
+ break;
+ }
+ case NECP_SESSION_ACTION_UNREGISTER_SERVICE: {
+ return_value = necp_session_unregister_service(session, uap, retval);
+ break;
+ }
+ case NECP_SESSION_ACTION_POLICY_DUMP_ALL: {
+ return_value = necp_session_dump_all(session, uap, retval);
+ break;
+ }
+ default: {
+ NECPLOG(LOG_ERR, "necp_session_action unknown action (%u)", action);
+ return_value = EINVAL;
+ break;
+ }
}
- FREE(response, M_NECP);
- return (success);
+done:
+ NECP_SESSION_UNLOCK(session);
+ fp_drop(p, uap->necp_fd, fp, 0);
+ return return_value;
}
-static bool
-necp_send_error_response(struct necp_session *session, u_int8_t packet_type, u_int32_t message_id, u_int32_t error)
+struct necp_resolver_key_state {
+ const struct ccdigest_info *digest_info;
+ uint8_t key[CCSHA256_OUTPUT_SIZE];
+};
+static struct necp_resolver_key_state s_necp_resolver_key_state;
+
+static void
+necp_generate_resolver_key(void)
{
- bool success = TRUE;
- u_int8_t *response = NULL;
- u_int8_t *cursor = NULL;
- size_t response_size = sizeof(struct necp_packet_header) + sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(u_int32_t);
- MALLOC(response, u_int8_t *, response_size, M_NECP, M_WAITOK);
- if (response == NULL) {
- return (FALSE);
+ s_necp_resolver_key_state.digest_info = ccsha256_di();
+ cc_rand_generate(s_necp_resolver_key_state.key, sizeof(s_necp_resolver_key_state.key));
+}
+
+static void
+necp_sign_update_context(const struct ccdigest_info *di,
+ cchmac_ctx_t ctx,
+ uuid_t client_id,
+ u_int8_t *query,
+ u_int32_t query_length,
+ u_int8_t *answer,
+ u_int32_t answer_length)
+{
+ const uint8_t context[32] = {[0 ... 31] = 0x20}; // 0x20 repeated 32 times
+ const char *context_string = "NECP Resolver Binder";
+ uint8_t separator = 0;
+ cchmac_update(di, ctx, sizeof(context), context);
+ cchmac_update(di, ctx, strlen(context_string), context_string);
+ cchmac_update(di, ctx, sizeof(separator), &separator);
+ cchmac_update(di, ctx, sizeof(uuid_t), client_id);
+ cchmac_update(di, ctx, sizeof(query_length), &query_length);
+ cchmac_update(di, ctx, query_length, query);
+ cchmac_update(di, ctx, sizeof(answer_length), &answer_length);
+ cchmac_update(di, ctx, answer_length, answer);
+}
+
+int
+necp_sign_resolver_answer(uuid_t client_id, u_int8_t *query, u_int32_t query_length,
+ u_int8_t *answer, u_int32_t answer_length,
+ u_int8_t *tag, u_int32_t *out_tag_length)
+{
+ if (s_necp_resolver_key_state.digest_info == NULL) {
+ return EINVAL;
}
- cursor = response;
- cursor = necp_buffer_write_packet_header(cursor, packet_type, NECP_PACKET_FLAGS_RESPONSE, message_id);
- cursor = necp_buffer_write_tlv(cursor, NECP_TLV_ERROR, sizeof(error), &error);
- if (!(success = necp_send_ctl_data(session, (u_int8_t *)response, response_size))) {
- NECPLOG0(LOG_ERR, "Failed to send response");
+ if (query == NULL ||
+ query_length == 0 ||
+ answer == NULL ||
+ answer_length == 0 ||
+ tag == NULL ||
+ out_tag_length == NULL) {
+ return EINVAL;
}
- FREE(response, M_NECP);
- return (success);
+ size_t required_tag_length = s_necp_resolver_key_state.digest_info->output_size;
+ if (*out_tag_length < required_tag_length) {
+ return ERANGE;
+ }
+
+ *out_tag_length = required_tag_length;
+
+ cchmac_ctx_decl(s_necp_resolver_key_state.digest_info->state_size,
+ s_necp_resolver_key_state.digest_info->block_size, ctx);
+ cchmac_init(s_necp_resolver_key_state.digest_info, ctx,
+ sizeof(s_necp_resolver_key_state.key),
+ s_necp_resolver_key_state.key);
+ necp_sign_update_context(s_necp_resolver_key_state.digest_info,
+ ctx, client_id, query, query_length,
+ answer, answer_length);
+ cchmac_final(s_necp_resolver_key_state.digest_info, ctx, tag);
+
+ return 0;
}
-static bool
-necp_send_policy_id_response(struct necp_session *session, u_int8_t packet_type, u_int32_t message_id, necp_policy_id policy_id)
+bool
+necp_validate_resolver_answer(uuid_t client_id, u_int8_t *query, u_int32_t query_length,
+ u_int8_t *answer, u_int32_t answer_length,
+ u_int8_t *tag, u_int32_t tag_length)
{
- bool success = TRUE;
- u_int8_t *response = NULL;
- u_int8_t *cursor = NULL;
- size_t response_size = sizeof(struct necp_packet_header) + sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(u_int32_t);
- MALLOC(response, u_int8_t *, response_size, M_NECP, M_WAITOK);
- if (response == NULL) {
- return (FALSE);
+ if (s_necp_resolver_key_state.digest_info == NULL) {
+ return false;
+ }
+
+ if (query == NULL ||
+ query_length == 0 ||
+ answer == NULL ||
+ answer_length == 0 ||
+ tag == NULL ||
+ tag_length == 0) {
+ return false;
}
- cursor = response;
- cursor = necp_buffer_write_packet_header(cursor, packet_type, NECP_PACKET_FLAGS_RESPONSE, message_id);
- cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_ID, sizeof(policy_id), &policy_id);
- if (!(success = necp_send_ctl_data(session, (u_int8_t *)response, response_size))) {
- NECPLOG0(LOG_ERR, "Failed to send response");
+ size_t required_tag_length = s_necp_resolver_key_state.digest_info->output_size;
+ if (tag_length != required_tag_length) {
+ return false;
}
- FREE(response, M_NECP);
- return (success);
+ uint8_t actual_tag[required_tag_length];
+
+ cchmac_ctx_decl(s_necp_resolver_key_state.digest_info->state_size,
+ s_necp_resolver_key_state.digest_info->block_size, ctx);
+ cchmac_init(s_necp_resolver_key_state.digest_info, ctx,
+ sizeof(s_necp_resolver_key_state.key),
+ s_necp_resolver_key_state.key);
+ necp_sign_update_context(s_necp_resolver_key_state.digest_info,
+ ctx, client_id, query, query_length,
+ answer, answer_length);
+ cchmac_final(s_necp_resolver_key_state.digest_info, ctx, actual_tag);
+
+ return cc_cmp_safe(s_necp_resolver_key_state.digest_info->output_size, tag, actual_tag) == 0;
}
-static errno_t
-necp_ctl_send(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, mbuf_t packet, int flags)
+errno_t
+necp_init(void)
{
-#pragma unused(kctlref, unit, flags)
- struct necp_session *session = (struct necp_session *)unitinfo;
- struct necp_packet_header header;
- int error = 0;
+ errno_t result = 0;
- if (session == NULL) {
- NECPLOG0(LOG_ERR, "Got a NULL session");
- error = EINVAL;
+ necp_log_handle = os_log_create("com.apple.xnu.net.necp", "necp");
+
+ necp_kernel_policy_grp_attr = lck_grp_attr_alloc_init();
+ if (necp_kernel_policy_grp_attr == NULL) {
+ NECPLOG0(LOG_ERR, "lck_grp_attr_alloc_init failed");
+ result = ENOMEM;
goto done;
}
- if (mbuf_pkthdr_len(packet) < sizeof(header)) {
- NECPLOG(LOG_ERR, "Got a bad packet, length (%lu) < sizeof header (%lu)", mbuf_pkthdr_len(packet), sizeof(header));
- error = EINVAL;
+ necp_kernel_policy_mtx_grp = lck_grp_alloc_init(NECP_CONTROL_NAME, necp_kernel_policy_grp_attr);
+ if (necp_kernel_policy_mtx_grp == NULL) {
+ NECPLOG0(LOG_ERR, "lck_grp_alloc_init failed");
+ result = ENOMEM;
goto done;
}
- error = mbuf_copydata(packet, 0, sizeof(header), &header);
- if (error) {
- NECPLOG(LOG_ERR, "mbuf_copydata failed for the header: %d", error);
- error = ENOBUFS;
+ necp_kernel_policy_mtx_attr = lck_attr_alloc_init();
+ if (necp_kernel_policy_mtx_attr == NULL) {
+ NECPLOG0(LOG_ERR, "lck_attr_alloc_init failed");
+ result = ENOMEM;
goto done;
}
- if (session->proc_locked) {
- // Verify that the calling process is allowed to send messages
- uuid_t proc_uuid;
- proc_getexecutableuuid(current_proc(), proc_uuid, sizeof(proc_uuid));
- if (uuid_compare(proc_uuid, session->proc_uuid) != 0) {
- necp_send_error_response(session, header.packet_type, header.message_id, NECP_ERROR_INVALID_PROCESS);
- goto done;
- }
- } else {
- // If not locked, update the proc_uuid and proc_pid of the session
- proc_getexecutableuuid(current_proc(), session->proc_uuid, sizeof(session->proc_uuid));
- session->proc_pid = proc_pid(current_proc());
+ lck_rw_init(&necp_kernel_policy_lock, necp_kernel_policy_mtx_grp, necp_kernel_policy_mtx_attr);
+
+ necp_route_rule_grp_attr = lck_grp_attr_alloc_init();
+ if (necp_route_rule_grp_attr == NULL) {
+ NECPLOG0(LOG_ERR, "lck_grp_attr_alloc_init failed");
+ result = ENOMEM;
+ goto done;
}
- switch (header.packet_type) {
- case NECP_PACKET_TYPE_POLICY_ADD: {
- necp_handle_policy_add(session, header.message_id, packet, sizeof(header));
- break;
+ necp_route_rule_mtx_grp = lck_grp_alloc_init("necp_route_rule", necp_route_rule_grp_attr);
+ if (necp_route_rule_mtx_grp == NULL) {
+ NECPLOG0(LOG_ERR, "lck_grp_alloc_init failed");
+ result = ENOMEM;
+ goto done;
+ }
+
+ necp_route_rule_mtx_attr = lck_attr_alloc_init();
+ if (necp_route_rule_mtx_attr == NULL) {
+ NECPLOG0(LOG_ERR, "lck_attr_alloc_init failed");
+ result = ENOMEM;
+ goto done;
+ }
+
+ lck_rw_init(&necp_route_rule_lock, necp_route_rule_mtx_grp, necp_route_rule_mtx_attr);
+
+ necp_client_init();
+
+ TAILQ_INIT(&necp_session_list);
+
+ LIST_INIT(&necp_kernel_socket_policies);
+ LIST_INIT(&necp_kernel_ip_output_policies);
+
+ LIST_INIT(&necp_account_id_list);
+
+ LIST_INIT(&necp_uuid_service_id_list);
+
+ LIST_INIT(&necp_registered_service_list);
+
+ LIST_INIT(&necp_route_rules);
+ LIST_INIT(&necp_aggregate_route_rules);
+
+ necp_generate_resolver_key();
+
+ necp_uuid_app_id_hashtbl = hashinit(NECP_UUID_APP_ID_HASH_SIZE, M_NECP, &necp_uuid_app_id_hash_mask);
+ necp_uuid_app_id_hash_num_buckets = necp_uuid_app_id_hash_mask + 1;
+ necp_num_uuid_app_id_mappings = 0;
+ necp_uuid_app_id_mappings_dirty = FALSE;
+
+ necp_kernel_application_policies_condition_mask = 0;
+ necp_kernel_socket_policies_condition_mask = 0;
+ necp_kernel_ip_output_policies_condition_mask = 0;
+
+ necp_kernel_application_policies_count = 0;
+ necp_kernel_socket_policies_count = 0;
+ necp_kernel_socket_policies_non_app_count = 0;
+ necp_kernel_ip_output_policies_count = 0;
+ necp_kernel_ip_output_policies_non_id_count = 0;
+
+ necp_kernel_socket_policies_gencount = 1;
+
+ memset(&necp_kernel_socket_policies_map, 0, sizeof(necp_kernel_socket_policies_map));
+ memset(&necp_kernel_ip_output_policies_map, 0, sizeof(necp_kernel_ip_output_policies_map));
+ necp_kernel_socket_policies_app_layer_map = NULL;
+
+ necp_drop_unentitled_order = necp_get_first_order_for_priority(necp_drop_unentitled_level);
+
+done:
+ if (result != 0) {
+ if (necp_kernel_policy_mtx_attr != NULL) {
+ lck_attr_free(necp_kernel_policy_mtx_attr);
+ necp_kernel_policy_mtx_attr = NULL;
}
- case NECP_PACKET_TYPE_POLICY_GET: {
- necp_handle_policy_get(session, header.message_id, packet, sizeof(header));
- break;
+ if (necp_kernel_policy_mtx_grp != NULL) {
+ lck_grp_free(necp_kernel_policy_mtx_grp);
+ necp_kernel_policy_mtx_grp = NULL;
}
- case NECP_PACKET_TYPE_POLICY_DELETE: {
- necp_handle_policy_delete(session, header.message_id, packet, sizeof(header));
- break;
+ if (necp_kernel_policy_grp_attr != NULL) {
+ lck_grp_attr_free(necp_kernel_policy_grp_attr);
+ necp_kernel_policy_grp_attr = NULL;
}
- case NECP_PACKET_TYPE_POLICY_APPLY_ALL: {
- necp_handle_policy_apply_all(session, header.message_id, packet, sizeof(header));
- break;
+ if (necp_route_rule_mtx_attr != NULL) {
+ lck_attr_free(necp_route_rule_mtx_attr);
+ necp_route_rule_mtx_attr = NULL;
}
- case NECP_PACKET_TYPE_POLICY_LIST_ALL: {
- necp_handle_policy_list_all(session, header.message_id, packet, sizeof(header));
- break;
+ if (necp_route_rule_mtx_grp != NULL) {
+ lck_grp_free(necp_route_rule_mtx_grp);
+ necp_route_rule_mtx_grp = NULL;
}
- case NECP_PACKET_TYPE_POLICY_DELETE_ALL: {
- necp_handle_policy_delete_all(session, header.message_id, packet, sizeof(header));
- break;
+ if (necp_route_rule_grp_attr != NULL) {
+ lck_grp_attr_free(necp_route_rule_grp_attr);
+ necp_route_rule_grp_attr = NULL;
}
- case NECP_PACKET_TYPE_SET_SESSION_PRIORITY: {
- necp_handle_set_session_priority(session, header.message_id, packet, sizeof(header));
- break;
+ }
+ return result;
+}
+
+static void
+necp_post_change_event(struct kev_necp_policies_changed_data *necp_event_data)
+{
+ struct kev_msg ev_msg;
+ memset(&ev_msg, 0, sizeof(ev_msg));
+
+ ev_msg.vendor_code = KEV_VENDOR_APPLE;
+ ev_msg.kev_class = KEV_NETWORK_CLASS;
+ ev_msg.kev_subclass = KEV_NECP_SUBCLASS;
+ ev_msg.event_code = KEV_NECP_POLICIES_CHANGED;
+
+ ev_msg.dv[0].data_ptr = necp_event_data;
+ ev_msg.dv[0].data_length = sizeof(necp_event_data->changed_count);
+ ev_msg.dv[1].data_length = 0;
+
+ kev_post_msg(&ev_msg);
+}
+
+static inline bool
+necp_buffer_write_tlv_validate(u_int8_t *cursor, u_int8_t type, u_int32_t length,
+ u_int8_t *buffer, u_int32_t buffer_length)
+{
+ if (cursor < buffer || (uintptr_t)(cursor - buffer) > buffer_length) {
+ NECPLOG0(LOG_ERR, "Cannot write TLV in buffer (invalid cursor)");
+ return false;
+ }
+ u_int8_t *next_tlv = (u_int8_t *)(cursor + sizeof(type) + sizeof(length) + length);
+ if (next_tlv <= buffer || // make sure the next TLV start doesn't overflow
+ (uintptr_t)(next_tlv - buffer) > buffer_length) { // make sure the next TLV has enough room in buffer
+ NECPLOG(LOG_ERR, "Cannot write TLV in buffer (TLV length %u, buffer length %u)",
+ length, buffer_length);
+ return false;
+ }
+ return true;
+}
+
+u_int8_t *
+necp_buffer_write_tlv_if_different(u_int8_t *cursor, u_int8_t type,
+ u_int32_t length, const void *value, bool *updated,
+ u_int8_t *buffer, u_int32_t buffer_length)
+{
+ if (!necp_buffer_write_tlv_validate(cursor, type, length, buffer, buffer_length)) {
+ // If we can't fit this TLV, return the current cursor
+ return cursor;
+ }
+ u_int8_t *next_tlv = (u_int8_t *)(cursor + sizeof(type) + sizeof(length) + length);
+ if (*updated || *(u_int8_t *)(cursor) != type) {
+ *(u_int8_t *)(cursor) = type;
+ *updated = TRUE;
+ }
+ if (*updated || *(u_int32_t *)(void *)(cursor + sizeof(type)) != length) {
+ *(u_int32_t *)(void *)(cursor + sizeof(type)) = length;
+ *updated = TRUE;
+ }
+ if (length > 0) {
+ if (*updated || memcmp((u_int8_t *)(cursor + sizeof(type) + sizeof(length)), value, length) != 0) {
+ memcpy((u_int8_t *)(cursor + sizeof(type) + sizeof(length)), value, length);
+ *updated = TRUE;
}
- case NECP_PACKET_TYPE_LOCK_SESSION_TO_PROC: {
- necp_handle_lock_session_to_proc(session, header.message_id, packet, sizeof(header));
- break;
+ }
+ return next_tlv;
+}
+
+u_int8_t *
+necp_buffer_write_tlv(u_int8_t *cursor, u_int8_t type,
+ u_int32_t length, const void *value,
+ u_int8_t *buffer, u_int32_t buffer_length)
+{
+ if (!necp_buffer_write_tlv_validate(cursor, type, length, buffer, buffer_length)) {
+ return NULL;
+ }
+ u_int8_t *next_tlv = (u_int8_t *)(cursor + sizeof(type) + sizeof(length) + length);
+ *(u_int8_t *)(cursor) = type;
+ *(u_int32_t *)(void *)(cursor + sizeof(type)) = length;
+ if (length > 0) {
+ memcpy((u_int8_t *)(cursor + sizeof(type) + sizeof(length)), value, length);
+ }
+
+ return next_tlv;
+}
+
+u_int8_t
+necp_buffer_get_tlv_type(u_int8_t *buffer, int tlv_offset)
+{
+ u_int8_t *type = NULL;
+
+ if (buffer == NULL) {
+ return 0;
+ }
+
+ type = (u_int8_t *)((u_int8_t *)buffer + tlv_offset);
+ return type ? *type : 0;
+}
+
+u_int32_t
+necp_buffer_get_tlv_length(u_int8_t *buffer, int tlv_offset)
+{
+ u_int32_t *length = NULL;
+
+ if (buffer == NULL) {
+ return 0;
+ }
+
+ length = (u_int32_t *)(void *)((u_int8_t *)buffer + tlv_offset + sizeof(u_int8_t));
+ return length ? *length : 0;
+}
+
+u_int8_t *
+necp_buffer_get_tlv_value(u_int8_t *buffer, int tlv_offset, u_int32_t *value_size)
+{
+ u_int8_t *value = NULL;
+ u_int32_t length = necp_buffer_get_tlv_length(buffer, tlv_offset);
+ if (length == 0) {
+ return value;
+ }
+
+ if (value_size) {
+ *value_size = length;
+ }
+
+ value = (u_int8_t *)((u_int8_t *)buffer + tlv_offset + sizeof(u_int8_t) + sizeof(u_int32_t));
+ return value;
+}
+
+int
+necp_buffer_find_tlv(u_int8_t *buffer, u_int32_t buffer_length, int offset, u_int8_t type, int *err, int next)
+{
+ if (err != NULL) {
+ *err = ENOENT;
+ }
+ if (offset < 0) {
+ if (err != NULL) {
+ *err = EINVAL;
}
- case NECP_PACKET_TYPE_REGISTER_SERVICE: {
- necp_handle_register_service(session, header.message_id, packet, sizeof(header));
- break;
+ return -1;
+ }
+ int cursor = offset;
+ int next_cursor;
+ u_int32_t curr_length;
+ u_int8_t curr_type;
+
+ while (TRUE) {
+ if ((((u_int32_t)cursor) + sizeof(curr_type) + sizeof(curr_length)) > buffer_length) {
+ return -1;
+ }
+ if (!next) {
+ curr_type = necp_buffer_get_tlv_type(buffer, cursor);
+ } else {
+ next = 0;
+ curr_type = NECP_TLV_NIL;
}
- case NECP_PACKET_TYPE_UNREGISTER_SERVICE: {
- necp_handle_unregister_service(session, header.message_id, packet, sizeof(header));
- break;
+ curr_length = necp_buffer_get_tlv_length(buffer, cursor);
+ if (curr_length > buffer_length - ((u_int32_t)cursor + sizeof(curr_type) + sizeof(curr_length))) {
+ return -1;
}
- default: {
- NECPLOG(LOG_ERR, "Received unknown message type %d", header.packet_type);
- necp_send_error_response(session, header.packet_type, header.message_id, NECP_ERROR_UNKNOWN_PACKET_TYPE);
- break;
+
+ next_cursor = (cursor + sizeof(curr_type) + sizeof(curr_length) + curr_length);
+ if (curr_type == type) {
+ // check if entire TLV fits inside buffer
+ if (((u_int32_t)next_cursor) <= buffer_length) {
+ if (err != NULL) {
+ *err = 0;
+ }
+ return cursor;
+ } else {
+ return -1;
+ }
}
+ cursor = next_cursor;
}
-
-done:
- mbuf_freem(packet);
- return (error);
}
-static void
-necp_ctl_rcvd(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, int flags)
+static int
+necp_find_tlv(u_int8_t *buffer, u_int32_t buffer_length, int offset, u_int8_t type, int *err, int next)
{
-#pragma unused(kctlref, unit, unitinfo, flags)
- return;
+ int cursor = -1;
+ if (buffer != NULL) {
+ cursor = necp_buffer_find_tlv(buffer, buffer_length, offset, type, err, next);
+ }
+ return cursor;
}
-static errno_t
-necp_ctl_getopt(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, int opt, void *data, size_t *len)
+static int
+necp_get_tlv_at_offset(u_int8_t *buffer, u_int32_t buffer_length,
+ int tlv_offset, u_int32_t out_buffer_length, void *out_buffer, u_int32_t *value_size)
{
-#pragma unused(kctlref, unit, unitinfo, opt, data, len)
- return (0);
+ if (buffer == NULL) {
+ NECPLOG0(LOG_ERR, "necp_get_tlv_at_offset buffer is NULL");
+ return EINVAL;
+ }
+
+ // Handle buffer parsing
+
+ // Validate that buffer has enough room for any TLV
+ if (tlv_offset + sizeof(u_int8_t) + sizeof(u_int32_t) > buffer_length) {
+ NECPLOG(LOG_ERR, "necp_get_tlv_at_offset buffer_length is too small for TLV (%u < %lu)",
+ buffer_length, tlv_offset + sizeof(u_int8_t) + sizeof(u_int32_t));
+ return EINVAL;
+ }
+
+ // Validate that buffer has enough room for this TLV
+ u_int32_t tlv_length = necp_buffer_get_tlv_length(buffer, tlv_offset);
+ if (tlv_length > buffer_length - (tlv_offset + sizeof(u_int8_t) + sizeof(u_int32_t))) {
+ NECPLOG(LOG_ERR, "necp_get_tlv_at_offset buffer_length is too small for TLV of length %u (%u < %lu)",
+ tlv_length, buffer_length, tlv_offset + sizeof(u_int8_t) + sizeof(u_int32_t) + tlv_length);
+ return EINVAL;
+ }
+
+ if (out_buffer != NULL && out_buffer_length > 0) {
+ // Validate that out buffer is large enough for value
+ if (out_buffer_length < tlv_length) {
+ NECPLOG(LOG_ERR, "necp_get_tlv_at_offset out_buffer_length is too small for TLV value (%u < %u)",
+ out_buffer_length, tlv_length);
+ return EINVAL;
+ }
+
+ // Get value pointer
+ u_int8_t *tlv_value = necp_buffer_get_tlv_value(buffer, tlv_offset, NULL);
+ if (tlv_value == NULL) {
+ NECPLOG0(LOG_ERR, "necp_get_tlv_at_offset tlv_value is NULL");
+ return ENOENT;
+ }
+
+ // Copy value
+ memcpy(out_buffer, tlv_value, tlv_length);
+ }
+
+ // Copy out length
+ if (value_size != NULL) {
+ *value_size = tlv_length;
+ }
+
+ return 0;
}
-static errno_t
-necp_ctl_setopt(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, int opt, void *data, size_t len)
+static int
+necp_get_tlv(u_int8_t *buffer, u_int32_t buffer_length,
+ int offset, u_int8_t type, u_int32_t buff_len, void *buff, u_int32_t *value_size)
{
-#pragma unused(kctlref, unit, unitinfo, opt, data, len)
- return (0);
+ int error = 0;
+
+ int tlv_offset = necp_find_tlv(buffer, buffer_length, offset, type, &error, 0);
+ if (tlv_offset < 0) {
+ return error;
+ }
+
+ return necp_get_tlv_at_offset(buffer, buffer_length, tlv_offset, buff_len, buff, value_size);
}
// Session Management
+
static struct necp_session *
-necp_create_session(u_int32_t control_unit)
+necp_create_session(void)
{
struct necp_session *new_session = NULL;
- MALLOC(new_session, struct necp_session *, sizeof(*new_session), M_NECP, M_WAITOK);
+ MALLOC(new_session, struct necp_session *, sizeof(*new_session), M_NECP, M_WAITOK | M_ZERO);
if (new_session == NULL) {
goto done;
}
- if (necp_debug) {
- NECPLOG(LOG_DEBUG, "Create NECP session, control unit %d", control_unit);
- }
- memset(new_session, 0, sizeof(*new_session));
+
+ new_session->necp_fd_type = necp_fd_type_session;
new_session->session_priority = NECP_SESSION_PRIORITY_UNKNOWN;
- new_session->session_order = necp_allocate_new_session_order(new_session->session_priority, control_unit);
- new_session->control_unit = control_unit;
new_session->dirty = FALSE;
LIST_INIT(&new_session->policies);
+ lck_mtx_init(&new_session->lock, necp_kernel_policy_mtx_grp, necp_kernel_policy_mtx_attr);
+ // Take the lock
lck_rw_lock_exclusive(&necp_kernel_policy_lock);
+
+ // Find the next available control unit
+ u_int32_t control_unit = 1;
+ struct necp_session *next_session = NULL;
+ TAILQ_FOREACH(next_session, &necp_session_list, chain) {
+ if (next_session->control_unit > control_unit) {
+ // Found a gap, grab this control unit
+ break;
+ }
+
+ // Try the next control unit, loop around
+ control_unit = next_session->control_unit + 1;
+ }
+
+ new_session->control_unit = control_unit;
+ new_session->session_order = necp_allocate_new_session_order(new_session->session_priority, control_unit);
+
+ if (next_session != NULL) {
+ TAILQ_INSERT_BEFORE(next_session, new_session, chain);
+ } else {
+ TAILQ_INSERT_TAIL(&necp_session_list, new_session, chain);
+ }
+
necp_session_count++;
lck_rw_done(&necp_kernel_policy_lock);
+ if (necp_debug) {
+ NECPLOG(LOG_DEBUG, "Created NECP session, control unit %d", control_unit);
+ }
+
done:
- return (new_session);
+ return new_session;
}
static void
if (necp_debug) {
NECPLOG0(LOG_DEBUG, "Deleted NECP session");
}
- FREE(session, M_NECP);
lck_rw_lock_exclusive(&necp_kernel_policy_lock);
+ TAILQ_REMOVE(&necp_session_list, session, chain);
necp_session_count--;
lck_rw_done(&necp_kernel_policy_lock);
+
+ lck_mtx_destroy(&session->lock, necp_kernel_policy_mtx_grp);
+ FREE(session, M_NECP);
}
}
// Session Policy Management
+
static inline u_int8_t
necp_policy_result_get_type_from_buffer(u_int8_t *buffer, u_int32_t length)
{
- return ((buffer && length >= sizeof(u_int8_t)) ? buffer[0] : 0);
+ return (buffer && length >= sizeof(u_int8_t)) ? buffer[0] : 0;
}
static inline u_int32_t
necp_policy_result_get_parameter_length_from_buffer(u_int8_t *buffer, u_int32_t length)
{
- return ((buffer && length > sizeof(u_int8_t)) ? (length - sizeof(u_int8_t)) : 0);
+ return (buffer && length > sizeof(u_int8_t)) ? (length - sizeof(u_int8_t)) : 0;
}
static inline u_int8_t *
necp_policy_result_get_parameter_pointer_from_buffer(u_int8_t *buffer, u_int32_t length)
{
- return ((buffer && length > sizeof(u_int8_t)) ? (buffer + sizeof(u_int8_t)) : NULL);
+ return (buffer && length > sizeof(u_int8_t)) ? (buffer + sizeof(u_int8_t)) : NULL;
}
static bool
{
u_int8_t type = necp_policy_result_get_type_from_buffer(buffer, length);
if (type == NECP_POLICY_RESULT_ROUTE_RULES) {
- return (TRUE);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+static inline bool
+necp_address_is_valid(struct sockaddr *address)
+{
+ if (address->sa_family == AF_INET) {
+ return address->sa_len == sizeof(struct sockaddr_in);
+ } else if (address->sa_family == AF_INET6) {
+ return address->sa_len == sizeof(struct sockaddr_in6);
+ } else {
+ return FALSE;
}
- return (FALSE);
}
static bool
u_int8_t type = necp_policy_result_get_type_from_buffer(buffer, length);
u_int32_t parameter_length = necp_policy_result_get_parameter_length_from_buffer(buffer, length);
switch (type) {
- case NECP_POLICY_RESULT_PASS: {
+ case NECP_POLICY_RESULT_PASS: {
+ if (parameter_length == 0 || parameter_length == sizeof(u_int32_t)) {
validated = TRUE;
- break;
- }
- case NECP_POLICY_RESULT_SKIP: {
- if (parameter_length >= sizeof(u_int32_t)) {
- validated = TRUE;
- }
- break;
}
- case NECP_POLICY_RESULT_DROP: {
+ break;
+ }
+ case NECP_POLICY_RESULT_DROP: {
+ if (parameter_length == 0 || parameter_length == sizeof(u_int32_t)) {
validated = TRUE;
- break;
- }
- case NECP_POLICY_RESULT_SOCKET_DIVERT: {
- if (parameter_length >= sizeof(u_int32_t)) {
- validated = TRUE;
- }
- break;
- }
- case NECP_POLICY_RESULT_SOCKET_SCOPED: {
- if (parameter_length > 0) {
- validated = TRUE;
- }
- break;
- }
- case NECP_POLICY_RESULT_IP_TUNNEL: {
- if (parameter_length > sizeof(u_int32_t)) {
- validated = TRUE;
- }
- break;
}
- case NECP_POLICY_RESULT_SOCKET_FILTER: {
- if (parameter_length >= sizeof(u_int32_t)) {
- validated = TRUE;
- }
- break;
+ break;
+ }
+ case NECP_POLICY_RESULT_ROUTE_RULES:
+ case NECP_POLICY_RESULT_SCOPED_DIRECT:
+ case NECP_POLICY_RESULT_ALLOW_UNENTITLED: {
+ validated = TRUE;
+ break;
+ }
+ case NECP_POLICY_RESULT_SKIP:
+ case NECP_POLICY_RESULT_SOCKET_DIVERT:
+ case NECP_POLICY_RESULT_SOCKET_FILTER: {
+ if (parameter_length >= sizeof(u_int32_t)) {
+ validated = TRUE;
}
- case NECP_POLICY_RESULT_ROUTE_RULES: {
+ break;
+ }
+ case NECP_POLICY_RESULT_IP_TUNNEL: {
+ if (parameter_length > sizeof(u_int32_t)) {
validated = TRUE;
- break;
}
- case NECP_POLICY_RESULT_TRIGGER:
- case NECP_POLICY_RESULT_TRIGGER_IF_NEEDED:
- case NECP_POLICY_RESULT_TRIGGER_SCOPED:
- case NECP_POLICY_RESULT_NO_TRIGGER_SCOPED:
- case NECP_POLICY_RESULT_USE_NETAGENT: {
- if (parameter_length >= sizeof(uuid_t)) {
- validated = TRUE;
- }
- break;
+ break;
+ }
+ case NECP_POLICY_RESULT_SOCKET_SCOPED: {
+ if (parameter_length > 0) {
+ validated = TRUE;
}
- default: {
- validated = FALSE;
- break;
+ break;
+ }
+ case NECP_POLICY_RESULT_TRIGGER:
+ case NECP_POLICY_RESULT_TRIGGER_IF_NEEDED:
+ case NECP_POLICY_RESULT_TRIGGER_SCOPED:
+ case NECP_POLICY_RESULT_NO_TRIGGER_SCOPED:
+ case NECP_POLICY_RESULT_USE_NETAGENT:
+ case NECP_POLICY_RESULT_NETAGENT_SCOPED:{
+ if (parameter_length >= sizeof(uuid_t)) {
+ validated = TRUE;
}
+ break;
+ }
+ default: {
+ validated = FALSE;
+ break;
+ }
}
if (necp_debug) {
NECPLOG(LOG_DEBUG, "Policy result type %d, valid %d", type, validated);
}
- return (validated);
+ return validated;
}
static inline u_int8_t
necp_policy_condition_get_type_from_buffer(u_int8_t *buffer, u_int32_t length)
{
- return ((buffer && length >= sizeof(u_int8_t)) ? buffer[0] : 0);
+ return (buffer && length >= sizeof(u_int8_t)) ? buffer[0] : 0;
}
static inline u_int8_t
necp_policy_condition_get_flags_from_buffer(u_int8_t *buffer, u_int32_t length)
{
- return ((buffer && length >= (2 * sizeof(u_int8_t))) ? buffer[1] : 0);
+ return (buffer && length >= (2 * sizeof(u_int8_t))) ? buffer[1] : 0;
}
static inline u_int32_t
necp_policy_condition_get_value_length_from_buffer(u_int8_t *buffer, u_int32_t length)
{
- return ((buffer && length >= (2 * sizeof(u_int8_t))) ? (length - (2 * sizeof(u_int8_t))) : 0);
+ return (buffer && length >= (2 * sizeof(u_int8_t))) ? (length - (2 * sizeof(u_int8_t))) : 0;
}
static inline u_int8_t *
necp_policy_condition_get_value_pointer_from_buffer(u_int8_t *buffer, u_int32_t length)
{
- return ((buffer && length > (2 * sizeof(u_int8_t))) ? (buffer + (2 * sizeof(u_int8_t))) : NULL);
+ return (buffer && length > (2 * sizeof(u_int8_t))) ? (buffer + (2 * sizeof(u_int8_t))) : NULL;
}
static inline bool
necp_policy_condition_is_default(u_int8_t *buffer, u_int32_t length)
{
- return (necp_policy_condition_get_type_from_buffer(buffer, length) == NECP_POLICY_CONDITION_DEFAULT);
+ return necp_policy_condition_get_type_from_buffer(buffer, length) == NECP_POLICY_CONDITION_DEFAULT;
}
static inline bool
necp_policy_condition_is_application(u_int8_t *buffer, u_int32_t length)
{
- return (necp_policy_condition_get_type_from_buffer(buffer, length) == NECP_POLICY_CONDITION_APPLICATION);
+ return necp_policy_condition_get_type_from_buffer(buffer, length) == NECP_POLICY_CONDITION_APPLICATION;
+}
+
+static inline bool
+necp_policy_condition_is_real_application(u_int8_t *buffer, u_int32_t length)
+{
+ return necp_policy_condition_get_type_from_buffer(buffer, length) == NECP_POLICY_CONDITION_REAL_APPLICATION;
}
static inline bool
necp_policy_condition_requires_application(u_int8_t *buffer, u_int32_t length)
{
u_int8_t type = necp_policy_condition_get_type_from_buffer(buffer, length);
- return (type == NECP_POLICY_CONDITION_REAL_APPLICATION ||
- type == NECP_POLICY_CONDITION_ENTITLEMENT);
+ return type == NECP_POLICY_CONDITION_REAL_APPLICATION;
+}
+
+static inline bool
+necp_policy_condition_requires_real_application(u_int8_t *buffer, u_int32_t length)
+{
+ u_int8_t type = necp_policy_condition_get_type_from_buffer(buffer, length);
+ u_int32_t condition_length = necp_policy_condition_get_value_length_from_buffer(buffer, length);
+ return type == NECP_POLICY_CONDITION_ENTITLEMENT && condition_length > 0;
}
static bool
{
bool validated = FALSE;
bool result_cannot_have_ip_layer = (policy_result_type == NECP_POLICY_RESULT_SOCKET_DIVERT ||
- policy_result_type == NECP_POLICY_RESULT_SOCKET_FILTER ||
- policy_result_type == NECP_POLICY_RESULT_TRIGGER ||
- policy_result_type == NECP_POLICY_RESULT_TRIGGER_IF_NEEDED ||
- policy_result_type == NECP_POLICY_RESULT_TRIGGER_SCOPED ||
- policy_result_type == NECP_POLICY_RESULT_NO_TRIGGER_SCOPED ||
- policy_result_type == NECP_POLICY_RESULT_SOCKET_SCOPED ||
- policy_result_type == NECP_POLICY_RESULT_ROUTE_RULES ||
- policy_result_type == NECP_POLICY_RESULT_USE_NETAGENT) ? TRUE : FALSE;
+ policy_result_type == NECP_POLICY_RESULT_SOCKET_FILTER ||
+ policy_result_type == NECP_POLICY_RESULT_TRIGGER ||
+ policy_result_type == NECP_POLICY_RESULT_TRIGGER_IF_NEEDED ||
+ policy_result_type == NECP_POLICY_RESULT_TRIGGER_SCOPED ||
+ policy_result_type == NECP_POLICY_RESULT_NO_TRIGGER_SCOPED ||
+ policy_result_type == NECP_POLICY_RESULT_SOCKET_SCOPED ||
+ policy_result_type == NECP_POLICY_RESULT_ROUTE_RULES ||
+ policy_result_type == NECP_POLICY_RESULT_USE_NETAGENT ||
+ policy_result_type == NECP_POLICY_RESULT_NETAGENT_SCOPED ||
+ policy_result_type == NECP_POLICY_RESULT_SCOPED_DIRECT ||
+ policy_result_type == NECP_POLICY_RESULT_ALLOW_UNENTITLED) ? TRUE : FALSE;
u_int32_t condition_length = necp_policy_condition_get_value_length_from_buffer(buffer, length);
u_int8_t *condition_value = necp_policy_condition_get_value_pointer_from_buffer(buffer, length);
u_int8_t type = necp_policy_condition_get_type_from_buffer(buffer, length);
u_int8_t flags = necp_policy_condition_get_flags_from_buffer(buffer, length);
switch (type) {
- case NECP_POLICY_CONDITION_APPLICATION:
- case NECP_POLICY_CONDITION_REAL_APPLICATION: {
- if (!(flags & NECP_POLICY_CONDITION_FLAGS_NEGATIVE) &&
- condition_length >= sizeof(uuid_t) &&
- condition_value != NULL &&
- !uuid_is_null(condition_value)) {
- validated = TRUE;
- }
- break;
+ case NECP_POLICY_CONDITION_APPLICATION:
+ case NECP_POLICY_CONDITION_REAL_APPLICATION: {
+ if (!(flags & NECP_POLICY_CONDITION_FLAGS_NEGATIVE) &&
+ condition_length >= sizeof(uuid_t) &&
+ condition_value != NULL &&
+ !uuid_is_null(condition_value)) {
+ validated = TRUE;
}
- case NECP_POLICY_CONDITION_DOMAIN:
- case NECP_POLICY_CONDITION_ACCOUNT:
- case NECP_POLICY_CONDITION_BOUND_INTERFACE: {
- if (condition_length > 0) {
- validated = TRUE;
- }
- break;
+ break;
+ }
+ case NECP_POLICY_CONDITION_DOMAIN:
+ case NECP_POLICY_CONDITION_ACCOUNT:
+ case NECP_POLICY_CONDITION_BOUND_INTERFACE:
+ case NECP_POLICY_CONDITION_SIGNING_IDENTIFIER: {
+ if (condition_length > 0) {
+ validated = TRUE;
}
- case NECP_POLICY_CONDITION_TRAFFIC_CLASS: {
- if (condition_length >= sizeof(struct necp_policy_condition_tc_range)) {
- validated = TRUE;
- }
- break;
+ break;
+ }
+ case NECP_POLICY_CONDITION_TRAFFIC_CLASS: {
+ if (condition_length >= sizeof(struct necp_policy_condition_tc_range)) {
+ validated = TRUE;
}
- case NECP_POLICY_CONDITION_DEFAULT:
- case NECP_POLICY_CONDITION_ALL_INTERFACES:
- case NECP_POLICY_CONDITION_ENTITLEMENT: {
- if (!(flags & NECP_POLICY_CONDITION_FLAGS_NEGATIVE)) {
- validated = TRUE;
- }
- break;
+ break;
+ }
+ case NECP_POLICY_CONDITION_DEFAULT:
+ case NECP_POLICY_CONDITION_ALL_INTERFACES:
+ case NECP_POLICY_CONDITION_ENTITLEMENT:
+ case NECP_POLICY_CONDITION_PLATFORM_BINARY:
+ case NECP_POLICY_CONDITION_HAS_CLIENT:
+ case NECP_POLICY_CONDITION_LOCAL_NETWORKS: {
+ if (!(flags & NECP_POLICY_CONDITION_FLAGS_NEGATIVE)) {
+ validated = TRUE;
}
- case NECP_POLICY_CONDITION_IP_PROTOCOL: {
- if (condition_length >= sizeof(u_int16_t)) {
- validated = TRUE;
- }
- break;
+ break;
+ }
+ case NECP_POLICY_CONDITION_SDK_VERSION: {
+ if (!(flags & NECP_POLICY_CONDITION_FLAGS_NEGATIVE) &&
+ condition_length >= sizeof(struct necp_policy_condition_sdk_version)) {
+ validated = TRUE;
}
- case NECP_POLICY_CONDITION_PID: {
- if (condition_length >= sizeof(pid_t) &&
- condition_value != NULL &&
- *((pid_t *)(void *)condition_value) != 0) {
- validated = TRUE;
- }
- break;
+ break;
+ }
+ case NECP_POLICY_CONDITION_IP_PROTOCOL: {
+ if (condition_length >= sizeof(u_int16_t)) {
+ validated = TRUE;
}
- case NECP_POLICY_CONDITION_UID: {
- if (condition_length >= sizeof(uid_t)) {
- validated = TRUE;
- }
- break;
+ break;
+ }
+ case NECP_POLICY_CONDITION_PID: {
+ if (condition_length >= sizeof(pid_t) &&
+ condition_value != NULL &&
+ *((pid_t *)(void *)condition_value) != 0) {
+ validated = TRUE;
}
- case NECP_POLICY_CONDITION_LOCAL_ADDR:
- case NECP_POLICY_CONDITION_REMOTE_ADDR: {
- if (!result_cannot_have_ip_layer && condition_length >= sizeof(struct necp_policy_condition_addr)) {
- validated = TRUE;
- }
- break;
+ break;
+ }
+ case NECP_POLICY_CONDITION_UID: {
+ if (condition_length >= sizeof(uid_t)) {
+ validated = TRUE;
}
- case NECP_POLICY_CONDITION_LOCAL_ADDR_RANGE:
- case NECP_POLICY_CONDITION_REMOTE_ADDR_RANGE: {
- if (!result_cannot_have_ip_layer && condition_length >= sizeof(struct necp_policy_condition_addr_range)) {
- validated = TRUE;
- }
- break;
+ break;
+ }
+ case NECP_POLICY_CONDITION_LOCAL_ADDR:
+ case NECP_POLICY_CONDITION_REMOTE_ADDR: {
+ if (!result_cannot_have_ip_layer && condition_length >= sizeof(struct necp_policy_condition_addr) &&
+ necp_address_is_valid(&((struct necp_policy_condition_addr *)(void *)condition_value)->address.sa)) {
+ validated = TRUE;
}
- default: {
- validated = FALSE;
- break;
+ break;
+ }
+ case NECP_POLICY_CONDITION_LOCAL_ADDR_RANGE:
+ case NECP_POLICY_CONDITION_REMOTE_ADDR_RANGE: {
+ if (!result_cannot_have_ip_layer && condition_length >= sizeof(struct necp_policy_condition_addr_range) &&
+ necp_address_is_valid(&((struct necp_policy_condition_addr_range *)(void *)condition_value)->start_address.sa) &&
+ necp_address_is_valid(&((struct necp_policy_condition_addr_range *)(void *)condition_value)->end_address.sa)) {
+ validated = TRUE;
}
+ break;
}
-
- if (necp_debug) {
- NECPLOG(LOG_DEBUG, "Policy condition type %d, valid %d", type, validated);
+ case NECP_POLICY_CONDITION_AGENT_TYPE: {
+ if (!(flags & NECP_POLICY_CONDITION_FLAGS_NEGATIVE) &&
+ condition_length >= sizeof(struct necp_policy_condition_agent_type)) {
+ validated = TRUE;
+ }
+ break;
}
-
- return (validated);
-}
-
-static bool
-necp_policy_route_rule_is_default(u_int8_t *buffer, u_int32_t length)
-{
- return (necp_policy_condition_get_value_length_from_buffer(buffer, length) == 0 &&
- necp_policy_condition_get_flags_from_buffer(buffer, length) == 0);
-}
-
-static bool
-necp_policy_route_rule_is_valid(u_int8_t *buffer, u_int32_t length)
-{
- bool validated = FALSE;
- u_int8_t type = necp_policy_condition_get_type_from_buffer(buffer, length);
- switch (type) {
- case NECP_ROUTE_RULE_ALLOW_INTERFACE: {
+ case NECP_POLICY_CONDITION_FLOW_IP_PROTOCOL: {
+ if (condition_length >= sizeof(u_int16_t)) {
validated = TRUE;
- break;
}
- case NECP_ROUTE_RULE_DENY_INTERFACE: {
+ break;
+ }
+ case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR:
+ case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR: {
+ if (condition_length >= sizeof(struct necp_policy_condition_addr) &&
+ necp_address_is_valid(&((struct necp_policy_condition_addr *)(void *)condition_value)->address.sa)) {
validated = TRUE;
- break;
}
- default: {
- validated = FALSE;
- break;
+ break;
+ }
+ case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_RANGE:
+ case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_RANGE: {
+ if (condition_length >= sizeof(struct necp_policy_condition_addr_range) &&
+ necp_address_is_valid(&((struct necp_policy_condition_addr_range *)(void *)condition_value)->start_address.sa) &&
+ necp_address_is_valid(&((struct necp_policy_condition_addr_range *)(void *)condition_value)->end_address.sa)) {
+ validated = TRUE;
}
+ break;
}
-
- if (necp_debug) {
- NECPLOG(LOG_DEBUG, "Policy route rule type %d, valid %d", type, validated);
+ case NECP_POLICY_CONDITION_CLIENT_FLAGS: {
+ if (condition_length == 0 || condition_length >= sizeof(u_int32_t)) {
+ validated = TRUE;
+ }
+ break;
}
-
- return (validated);
-}
-
-static void
-necp_handle_set_session_priority(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset)
-{
- int error;
- struct necp_session_policy *policy = NULL;
- struct necp_session_policy *temp_policy = NULL;
- u_int32_t response_error = NECP_ERROR_INTERNAL;
- u_int32_t requested_session_priority = NECP_SESSION_PRIORITY_UNKNOWN;
-
- // Read policy id
- error = necp_packet_get_tlv(packet, offset, NECP_TLV_SESSION_PRIORITY, sizeof(requested_session_priority), &requested_session_priority, NULL);
- if (error) {
- NECPLOG(LOG_ERR, "Failed to get session priority: %d", error);
- response_error = NECP_ERROR_INVALID_TLV;
- goto fail;
+ case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_EMPTY: {
+ validated = TRUE;
+ break;
}
-
- if (session == NULL) {
- NECPLOG0(LOG_ERR, "Failed to find session");
- response_error = NECP_ERROR_INTERNAL;
- goto fail;
+ case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_EMPTY: {
+ validated = TRUE;
+ break;
}
-
- // Enforce special session priorities with entitlements
- if (requested_session_priority == NECP_SESSION_PRIORITY_CONTROL ||
- requested_session_priority == NECP_SESSION_PRIORITY_PRIVILEGED_TUNNEL) {
- errno_t cred_result = priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_NECP_POLICIES, 0);
- if (cred_result != 0) {
- NECPLOG(LOG_ERR, "Session does not hold necessary entitlement to claim priority level %d", requested_session_priority);
- goto fail;
+ case NECP_POLICY_CONDITION_PACKET_FILTER_TAGS: {
+ if (condition_length >= sizeof(u_int16_t)) {
+ u_int16_t packet_filter_tags = *(u_int16_t *)(void *)condition_value;
+ if (packet_filter_tags > 0 && packet_filter_tags <= NECP_POLICY_CONDITION_PACKET_FILTER_TAG_MAX) {
+ validated = TRUE;
+ }
}
+ break;
+ }
+ case NECP_POLICY_CONDITION_FLOW_IS_LOOPBACK: {
+ validated = TRUE;
+ break;
+ }
+ default: {
+ validated = FALSE;
+ break;
}
-
- if (session->session_priority != requested_session_priority) {
- session->session_priority = requested_session_priority;
- session->session_order = necp_allocate_new_session_order(session->session_priority, session->control_unit);
- session->dirty = TRUE;
-
- // Mark all policies as needing updates
- LIST_FOREACH_SAFE(policy, &session->policies, chain, temp_policy) {
- policy->pending_update = TRUE;
- }
}
- necp_send_success_response(session, NECP_PACKET_TYPE_SET_SESSION_PRIORITY, message_id);
- return;
+ if (necp_debug) {
+ NECPLOG(LOG_DEBUG, "Policy condition type %d, valid %d", type, validated);
+ }
-fail:
- necp_send_error_response(session, NECP_PACKET_TYPE_SET_SESSION_PRIORITY, message_id, response_error);
+ return validated;
}
-static void
-necp_handle_lock_session_to_proc(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset)
+static bool
+necp_policy_route_rule_is_default(u_int8_t *buffer, u_int32_t length)
{
-#pragma unused(packet, offset)
- // proc_uuid already filled out
- session->proc_locked = TRUE;
- necp_send_success_response(session, NECP_PACKET_TYPE_LOCK_SESSION_TO_PROC, message_id);
+ return necp_policy_condition_get_value_length_from_buffer(buffer, length) == 0 &&
+ necp_policy_condition_get_flags_from_buffer(buffer, length) == 0;
}
-static void
-necp_handle_register_service(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset)
+static bool
+necp_policy_route_rule_is_valid(u_int8_t *buffer, u_int32_t length)
{
- int error;
- struct necp_service_registration *new_service = NULL;
- u_int32_t response_error = NECP_ERROR_INTERNAL;
- uuid_t service_uuid;
- uuid_clear(service_uuid);
-
- if (session == NULL) {
- NECPLOG0(LOG_ERR, "Failed to find session");
- response_error = NECP_ERROR_INTERNAL;
- goto fail;
+ bool validated = FALSE;
+ u_int8_t type = necp_policy_condition_get_type_from_buffer(buffer, length);
+ switch (type) {
+ case NECP_ROUTE_RULE_ALLOW_INTERFACE: {
+ validated = TRUE;
+ break;
}
-
- // Enforce entitlements
- errno_t cred_result = priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_NECP_POLICIES, 0);
- if (cred_result != 0) {
- NECPLOG0(LOG_ERR, "Session does not hold necessary entitlement to register service");
- goto fail;
+ case NECP_ROUTE_RULE_DENY_INTERFACE: {
+ validated = TRUE;
+ break;
+ }
+ case NECP_ROUTE_RULE_QOS_MARKING: {
+ validated = TRUE;
+ break;
+ }
+ case NECP_ROUTE_RULE_DENY_LQM_ABORT: {
+ validated = TRUE;
+ break;
+ }
+ default: {
+ validated = FALSE;
+ break;
}
-
- // Read service uuid
- error = necp_packet_get_tlv(packet, offset, NECP_TLV_SERVICE_UUID, sizeof(uuid_t), service_uuid, NULL);
- if (error) {
- NECPLOG(LOG_ERR, "Failed to get service UUID: %d", error);
- response_error = NECP_ERROR_INVALID_TLV;
- goto fail;
}
- MALLOC(new_service, struct necp_service_registration *, sizeof(*new_service), M_NECP, M_WAITOK);
- if (new_service == NULL) {
- NECPLOG0(LOG_ERR, "Failed to allocate service registration");
- response_error = NECP_ERROR_INTERNAL;
- goto fail;
+ if (necp_debug) {
+ NECPLOG(LOG_DEBUG, "Policy route rule type %d, valid %d", type, validated);
}
-
- lck_rw_lock_exclusive(&necp_kernel_policy_lock);
- memset(new_service, 0, sizeof(*new_service));
- new_service->service_id = necp_create_uuid_service_id_mapping(service_uuid);
- LIST_INSERT_HEAD(&session->services, new_service, session_chain);
- LIST_INSERT_HEAD(&necp_registered_service_list, new_service, kernel_chain);
- lck_rw_done(&necp_kernel_policy_lock);
- necp_send_success_response(session, NECP_PACKET_TYPE_REGISTER_SERVICE, message_id);
- return;
-fail:
- necp_send_error_response(session, NECP_PACKET_TYPE_REGISTER_SERVICE, message_id, response_error);
+ return validated;
}
-static void
-necp_handle_unregister_service(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset)
+static int
+necp_get_posix_error_for_necp_error(int response_error)
{
- int error;
- struct necp_service_registration *service = NULL;
- struct necp_service_registration *temp_service = NULL;
- u_int32_t response_error = NECP_ERROR_INTERNAL;
- struct necp_uuid_id_mapping *mapping = NULL;
- uuid_t service_uuid;
- uuid_clear(service_uuid);
-
- if (session == NULL) {
- NECPLOG0(LOG_ERR, "Failed to find session");
- response_error = NECP_ERROR_INTERNAL;
- goto fail;
+ switch (response_error) {
+ case NECP_ERROR_UNKNOWN_PACKET_TYPE:
+ case NECP_ERROR_INVALID_TLV:
+ case NECP_ERROR_POLICY_RESULT_INVALID:
+ case NECP_ERROR_POLICY_CONDITIONS_INVALID:
+ case NECP_ERROR_ROUTE_RULES_INVALID: {
+ return EINVAL;
}
-
- // Read service uuid
- error = necp_packet_get_tlv(packet, offset, NECP_TLV_SERVICE_UUID, sizeof(uuid_t), service_uuid, NULL);
- if (error) {
- NECPLOG(LOG_ERR, "Failed to get service UUID: %d", error);
- response_error = NECP_ERROR_INVALID_TLV;
- goto fail;
+ case NECP_ERROR_POLICY_ID_NOT_FOUND: {
+ return ENOENT;
+ }
+ case NECP_ERROR_INVALID_PROCESS: {
+ return EPERM;
+ }
+ case NECP_ERROR_INTERNAL:
+ default: {
+ return ENOMEM;
}
-
- // Mark remove all matching services for this session
- lck_rw_lock_exclusive(&necp_kernel_policy_lock);
- mapping = necp_uuid_lookup_service_id_locked(service_uuid);
- if (mapping != NULL) {
- LIST_FOREACH_SAFE(service, &session->services, session_chain, temp_service) {
- if (service->service_id == mapping->id) {
- LIST_REMOVE(service, session_chain);
- LIST_REMOVE(service, kernel_chain);
- FREE(service, M_NECP);
- }
- }
- necp_remove_uuid_service_id_mapping(service_uuid);
}
- lck_rw_done(&necp_kernel_policy_lock);
-
- necp_send_success_response(session, NECP_PACKET_TYPE_UNREGISTER_SERVICE, message_id);
- return;
-fail:
- necp_send_error_response(session, NECP_PACKET_TYPE_UNREGISTER_SERVICE, message_id, response_error);
}
-static void
-necp_handle_policy_add(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset)
+static necp_policy_id
+necp_handle_policy_add(struct necp_session *session,
+ u_int8_t *tlv_buffer, size_t tlv_buffer_length, int offset, int *return_error)
{
bool has_default_condition = FALSE;
bool has_non_default_condition = FALSE;
bool has_application_condition = FALSE;
+ bool has_real_application_condition = FALSE;
bool requires_application_condition = FALSE;
+ bool requires_real_application_condition = FALSE;
u_int8_t *conditions_array = NULL;
u_int32_t conditions_array_size = 0;
int conditions_array_cursor;
u_int32_t policy_result_size = 0;
// Read policy order
- error = necp_packet_get_tlv(packet, offset, NECP_TLV_POLICY_ORDER, sizeof(order), &order, NULL);
+ error = necp_get_tlv(tlv_buffer, tlv_buffer_length, offset, NECP_TLV_POLICY_ORDER, sizeof(order), &order, NULL);
if (error) {
NECPLOG(LOG_ERR, "Failed to get policy order: %d", error);
response_error = NECP_ERROR_INVALID_TLV;
}
// Read policy result
- cursor = necp_packet_find_tlv(packet, offset, NECP_TLV_POLICY_RESULT, &error, 0);
- error = necp_packet_get_tlv_at_offset(packet, cursor, 0, NULL, &policy_result_size);
+ cursor = necp_find_tlv(tlv_buffer, tlv_buffer_length, offset, NECP_TLV_POLICY_RESULT, &error, 0);
+ if (error || cursor < 0) {
+ NECPLOG(LOG_ERR, "Failed to find policy result TLV: %d", error);
+ response_error = NECP_ERROR_INVALID_TLV;
+ goto fail;
+ }
+ error = necp_get_tlv_at_offset(tlv_buffer, tlv_buffer_length, cursor, 0, NULL, &policy_result_size);
if (error || policy_result_size == 0) {
NECPLOG(LOG_ERR, "Failed to get policy result length: %d", error);
response_error = NECP_ERROR_INVALID_TLV;
goto fail;
}
+ if (policy_result_size > NECP_MAX_POLICY_RESULT_SIZE) {
+ NECPLOG(LOG_ERR, "Policy result length too large: %u", policy_result_size);
+ response_error = NECP_ERROR_INVALID_TLV;
+ goto fail;
+ }
MALLOC(policy_result, u_int8_t *, policy_result_size, M_NECP, M_WAITOK);
if (policy_result == NULL) {
NECPLOG(LOG_ERR, "Failed to allocate a policy result buffer (size %d)", policy_result_size);
response_error = NECP_ERROR_INTERNAL;
goto fail;
}
- error = necp_packet_get_tlv_at_offset(packet, cursor, policy_result_size, policy_result, NULL);
+ error = necp_get_tlv_at_offset(tlv_buffer, tlv_buffer_length, cursor, policy_result_size, policy_result, NULL);
if (error) {
NECPLOG(LOG_ERR, "Failed to get policy result: %d", error);
response_error = NECP_ERROR_POLICY_RESULT_INVALID;
if (necp_policy_result_requires_route_rules(policy_result, policy_result_size)) {
// Read route rules conditions
- for (cursor = necp_packet_find_tlv(packet, offset, NECP_TLV_ROUTE_RULE, &error, 0);
- cursor >= 0;
- cursor = necp_packet_find_tlv(packet, cursor, NECP_TLV_ROUTE_RULE, &error, 1)) {
+ for (cursor = necp_find_tlv(tlv_buffer, tlv_buffer_length, offset, NECP_TLV_ROUTE_RULE, &error, 0);
+ cursor >= 0;
+ cursor = necp_find_tlv(tlv_buffer, tlv_buffer_length, cursor, NECP_TLV_ROUTE_RULE, &error, 1)) {
u_int32_t route_rule_size = 0;
- necp_packet_get_tlv_at_offset(packet, cursor, 0, NULL, &route_rule_size);
- if (route_rule_size > 0) {
- route_rules_array_size += (sizeof(u_int8_t) + sizeof(u_int32_t) + route_rule_size);
+ necp_get_tlv_at_offset(tlv_buffer, tlv_buffer_length, cursor, 0, NULL, &route_rule_size);
+ if (os_add_overflow(route_rules_array_size,
+ (sizeof(u_int8_t) + sizeof(u_int32_t) + route_rule_size),
+ &route_rules_array_size)) {
+ NECPLOG0(LOG_ERR, "Route rules size overflowed, too large");
+ response_error = NECP_ERROR_INVALID_TLV;
+ goto fail;
}
}
response_error = NECP_ERROR_INVALID_TLV;
goto fail;
}
-
+ if (route_rules_array_size > NECP_MAX_ROUTE_RULES_ARRAY_SIZE) {
+ NECPLOG(LOG_ERR, "Route rules length too large: %u", route_rules_array_size);
+ response_error = NECP_ERROR_INVALID_TLV;
+ goto fail;
+ }
MALLOC(route_rules_array, u_int8_t *, route_rules_array_size, M_NECP, M_WAITOK);
if (route_rules_array == NULL) {
NECPLOG(LOG_ERR, "Failed to allocate a policy route rules array (size %d)", route_rules_array_size);
}
route_rules_array_cursor = 0;
- for (cursor = necp_packet_find_tlv(packet, offset, NECP_TLV_ROUTE_RULE, &error, 0);
- cursor >= 0;
- cursor = necp_packet_find_tlv(packet, cursor, NECP_TLV_ROUTE_RULE, &error, 1)) {
+ for (cursor = necp_find_tlv(tlv_buffer, tlv_buffer_length, offset, NECP_TLV_ROUTE_RULE, &error, 0);
+ cursor >= 0;
+ cursor = necp_find_tlv(tlv_buffer, tlv_buffer_length, cursor, NECP_TLV_ROUTE_RULE, &error, 1)) {
u_int8_t route_rule_type = NECP_TLV_ROUTE_RULE;
u_int32_t route_rule_size = 0;
- necp_packet_get_tlv_at_offset(packet, cursor, 0, NULL, &route_rule_size);
- if (route_rule_size > 0 && route_rule_size <= (route_rules_array_size - route_rules_array_cursor)) {
+ necp_get_tlv_at_offset(tlv_buffer, tlv_buffer_length, cursor, 0, NULL, &route_rule_size);
+ if (route_rule_size > 0 &&
+ (sizeof(route_rule_type) + sizeof(route_rule_size) + route_rule_size) <= (route_rules_array_size - route_rules_array_cursor)) {
// Add type
memcpy((route_rules_array + route_rules_array_cursor), &route_rule_type, sizeof(route_rule_type));
route_rules_array_cursor += sizeof(route_rule_type);
route_rules_array_cursor += sizeof(route_rule_size);
// Add value
- necp_packet_get_tlv_at_offset(packet, cursor, route_rule_size, (route_rules_array + route_rules_array_cursor), NULL);
+ necp_get_tlv_at_offset(tlv_buffer, tlv_buffer_length, cursor, route_rule_size, (route_rules_array + route_rules_array_cursor), NULL);
if (!necp_policy_route_rule_is_valid((route_rules_array + route_rules_array_cursor), route_rule_size)) {
NECPLOG0(LOG_ERR, "Failed to validate policy route rule");
}
// Read policy conditions
- for (cursor = necp_packet_find_tlv(packet, offset, NECP_TLV_POLICY_CONDITION, &error, 0);
- cursor >= 0;
- cursor = necp_packet_find_tlv(packet, cursor, NECP_TLV_POLICY_CONDITION, &error, 1)) {
+ for (cursor = necp_find_tlv(tlv_buffer, tlv_buffer_length, offset, NECP_TLV_POLICY_CONDITION, &error, 0);
+ cursor >= 0;
+ cursor = necp_find_tlv(tlv_buffer, tlv_buffer_length, cursor, NECP_TLV_POLICY_CONDITION, &error, 1)) {
u_int32_t condition_size = 0;
- necp_packet_get_tlv_at_offset(packet, cursor, 0, NULL, &condition_size);
+ necp_get_tlv_at_offset(tlv_buffer, tlv_buffer_length, cursor, 0, NULL, &condition_size);
if (condition_size > 0) {
- conditions_array_size += (sizeof(u_int8_t) + sizeof(u_int32_t) + condition_size);
+ if (os_add_overflow(conditions_array_size,
+ (sizeof(u_int8_t) + sizeof(u_int32_t) + condition_size),
+ &conditions_array_size)) {
+ NECPLOG0(LOG_ERR, "Conditions size overflowed, too large");
+ response_error = NECP_ERROR_INVALID_TLV;
+ goto fail;
+ }
}
}
response_error = NECP_ERROR_INVALID_TLV;
goto fail;
}
+ if (conditions_array_size > NECP_MAX_CONDITIONS_ARRAY_SIZE) {
+ NECPLOG(LOG_ERR, "Conditions length too large: %u", conditions_array_size);
+ response_error = NECP_ERROR_INVALID_TLV;
+ goto fail;
+ }
MALLOC(conditions_array, u_int8_t *, conditions_array_size, M_NECP, M_WAITOK);
if (conditions_array == NULL) {
NECPLOG(LOG_ERR, "Failed to allocate a policy conditions array (size %d)", conditions_array_size);
}
conditions_array_cursor = 0;
- for (cursor = necp_packet_find_tlv(packet, offset, NECP_TLV_POLICY_CONDITION, &error, 0);
- cursor >= 0;
- cursor = necp_packet_find_tlv(packet, cursor, NECP_TLV_POLICY_CONDITION, &error, 1)) {
+ for (cursor = necp_find_tlv(tlv_buffer, tlv_buffer_length, offset, NECP_TLV_POLICY_CONDITION, &error, 0);
+ cursor >= 0;
+ cursor = necp_find_tlv(tlv_buffer, tlv_buffer_length, cursor, NECP_TLV_POLICY_CONDITION, &error, 1)) {
u_int8_t condition_type = NECP_TLV_POLICY_CONDITION;
u_int32_t condition_size = 0;
- necp_packet_get_tlv_at_offset(packet, cursor, 0, NULL, &condition_size);
- if (condition_size > 0 && condition_size <= (conditions_array_size - conditions_array_cursor)) {
+ necp_get_tlv_at_offset(tlv_buffer, tlv_buffer_length, cursor, 0, NULL, &condition_size);
+ if (condition_size > 0 &&
+ (sizeof(condition_type) + sizeof(condition_size) + condition_size) <= (conditions_array_size - conditions_array_cursor)) {
// Add type
memcpy((conditions_array + conditions_array_cursor), &condition_type, sizeof(condition_type));
conditions_array_cursor += sizeof(condition_type);
conditions_array_cursor += sizeof(condition_size);
// Add value
- necp_packet_get_tlv_at_offset(packet, cursor, condition_size, (conditions_array + conditions_array_cursor), NULL);
+ necp_get_tlv_at_offset(tlv_buffer, tlv_buffer_length, cursor, condition_size, (conditions_array + conditions_array_cursor), NULL);
if (!necp_policy_condition_is_valid((conditions_array + conditions_array_cursor), condition_size, necp_policy_result_get_type_from_buffer(policy_result, policy_result_size))) {
NECPLOG0(LOG_ERR, "Failed to validate policy condition");
response_error = NECP_ERROR_POLICY_CONDITIONS_INVALID;
response_error = NECP_ERROR_POLICY_CONDITIONS_INVALID;
goto fail;
}
-
+
if (necp_policy_condition_is_application((conditions_array + conditions_array_cursor), condition_size)) {
has_application_condition = TRUE;
}
-
+
+ if (necp_policy_condition_is_real_application((conditions_array + conditions_array_cursor), condition_size)) {
+ has_real_application_condition = TRUE;
+ }
+
if (necp_policy_condition_requires_application((conditions_array + conditions_array_cursor), condition_size)) {
requires_application_condition = TRUE;
}
+ if (necp_policy_condition_requires_real_application((conditions_array + conditions_array_cursor), condition_size)) {
+ requires_real_application_condition = TRUE;
+ }
+
conditions_array_cursor += condition_size;
}
}
-
+
if (requires_application_condition && !has_application_condition) {
NECPLOG0(LOG_ERR, "Failed to validate conditions; did not contain application condition");
response_error = NECP_ERROR_POLICY_CONDITIONS_INVALID;
goto fail;
}
+ if (requires_real_application_condition && !has_real_application_condition) {
+ NECPLOG0(LOG_ERR, "Failed to validate conditions; did not contain real application condition");
+ response_error = NECP_ERROR_POLICY_CONDITIONS_INVALID;
+ goto fail;
+ }
+
if ((policy = necp_policy_create(session, order, conditions_array, conditions_array_size, route_rules_array, route_rules_array_size, policy_result, policy_result_size)) == NULL) {
response_error = NECP_ERROR_INTERNAL;
goto fail;
}
- necp_send_policy_id_response(session, NECP_PACKET_TYPE_POLICY_ADD, message_id, policy->id);
- return;
+ return policy->local_id;
fail:
if (policy_result != NULL) {
FREE(route_rules_array, M_NECP);
}
- necp_send_error_response(session, NECP_PACKET_TYPE_POLICY_ADD, message_id, response_error);
+ if (return_error != NULL) {
+ *return_error = necp_get_posix_error_for_necp_error(response_error);
+ }
+ return 0;
}
-static void
-necp_handle_policy_get(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset)
+static necp_policy_id
+necp_policy_get_new_id(struct necp_session *session)
{
-#pragma unused(offset)
- int error;
- u_int8_t *response = NULL;
- u_int8_t *cursor = NULL;
- u_int32_t response_error = NECP_ERROR_INTERNAL;
- necp_policy_id policy_id = 0;
- u_int32_t order_tlv_size = 0;
- u_int32_t result_tlv_size = 0;
- u_int32_t response_size = 0;
+ session->last_policy_id++;
+ if (session->last_policy_id < 1) {
+ session->last_policy_id = 1;
+ }
- struct necp_session_policy *policy = NULL;
+ necp_policy_id newid = session->last_policy_id;
- // Read policy id
- error = necp_packet_get_tlv(packet, offset, NECP_TLV_POLICY_ID, sizeof(policy_id), &policy_id, NULL);
- if (error) {
- NECPLOG(LOG_ERR, "Failed to get policy id: %d", error);
- response_error = NECP_ERROR_INVALID_TLV;
- goto fail;
+ if (newid == 0) {
+ NECPLOG0(LOG_ERR, "Allocate policy id failed.\n");
+ return 0;
}
- policy = necp_policy_find(session, policy_id);
- if (policy == NULL || policy->pending_deletion) {
- NECPLOG(LOG_ERR, "Failed to find policy with id %d", policy_id);
- response_error = NECP_ERROR_POLICY_ID_NOT_FOUND;
- goto fail;
- }
+ return newid;
+}
- order_tlv_size = sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(necp_policy_order);
- result_tlv_size = (policy->result_size ? (sizeof(u_int8_t) + sizeof(u_int32_t) + policy->result_size) : 0);
- response_size = sizeof(struct necp_packet_header) + order_tlv_size + result_tlv_size + policy->conditions_size;
- MALLOC(response, u_int8_t *, response_size, M_NECP, M_WAITOK);
- if (response == NULL) {
- necp_send_error_response(session, NECP_PACKET_TYPE_POLICY_LIST_ALL, message_id, NECP_ERROR_INTERNAL);
- return;
+/*
+ * For the policy dump response this is the structure:
+ *
+ * <NECP_PACKET_HEADER>
+ * {
+ * type : NECP_TLV_POLICY_DUMP
+ * length : ...
+ * value :
+ * {
+ * {
+ * type : NECP_TLV_POLICY_ID
+ * len : ...
+ * value : ...
+ * }
+ * {
+ * type : NECP_TLV_POLICY_ORDER
+ * len : ...
+ * value : ...
+ * }
+ * {
+ * type : NECP_TLV_POLICY_RESULT_STRING
+ * len : ...
+ * value : ...
+ * }
+ * {
+ * type : NECP_TLV_POLICY_OWNER
+ * len : ...
+ * value : ...
+ * }
+ * {
+ * type : NECP_TLV_POLICY_CONDITION
+ * len : ...
+ * value :
+ * {
+ * {
+ * type : NECP_POLICY_CONDITION_ALL_INTERFACES
+ * len : ...
+ * value : ...
+ * }
+ * {
+ * type : NECP_POLICY_CONDITION_BOUND_INTERFACES
+ * len : ...
+ * value : ...
+ * }
+ * ...
+ * }
+ * }
+ * }
+ * }
+ * {
+ * type : NECP_TLV_POLICY_DUMP
+ * length : ...
+ * value :
+ * {
+ * {
+ * type : NECP_TLV_POLICY_ID
+ * len : ...
+ * value : ...
+ * }
+ * {
+ * type : NECP_TLV_POLICY_ORDER
+ * len : ...
+ * value : ...
+ * }
+ * {
+ * type : NECP_TLV_POLICY_RESULT_STRING
+ * len : ...
+ * value : ...
+ * }
+ * {
+ * type : NECP_TLV_POLICY_OWNER
+ * len : ...
+ * value : ...
+ * }
+ * {
+ * type : NECP_TLV_POLICY_CONDITION
+ * len : ...
+ * value :
+ * {
+ * {
+ * type : NECP_POLICY_CONDITION_ALL_INTERFACES
+ * len : ...
+ * value : ...
+ * }
+ * {
+ * type : NECP_POLICY_CONDITION_BOUND_INTERFACES
+ * len : ...
+ * value : ...
+ * }
+ * ...
+ * }
+ * }
+ * }
+ * }
+ * ...
+ */
+static int
+necp_handle_policy_dump_all(user_addr_t out_buffer, size_t out_buffer_length)
+{
+ struct necp_kernel_socket_policy *policy = NULL;
+ int policy_i;
+ int policy_count = 0;
+ u_int8_t **tlv_buffer_pointers = NULL;
+ u_int32_t *tlv_buffer_lengths = NULL;
+ u_int32_t total_tlv_len = 0;
+ u_int8_t *result_buf = NULL;
+ u_int8_t *result_buf_cursor = result_buf;
+ char result_string[MAX_RESULT_STRING_LEN];
+ char proc_name_string[MAXCOMLEN + 1];
+
+ int error_code = 0;
+ bool error_occured = false;
+ u_int32_t response_error = NECP_ERROR_INTERNAL;
+
+#define REPORT_ERROR(error) error_occured = true; \
+ response_error = error; \
+ goto done
+
+#define UNLOCK_AND_REPORT_ERROR(lock, error) lck_rw_done(lock); \
+ REPORT_ERROR(error)
+
+ errno_t cred_result = priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_NECP_POLICIES, 0);
+ if (cred_result != 0) {
+ NECPLOG0(LOG_ERR, "Session does not hold the necessary entitlement to get Network Extension Policy information");
+ REPORT_ERROR(NECP_ERROR_INTERNAL);
}
- cursor = response;
- cursor = necp_buffer_write_packet_header(cursor, NECP_PACKET_TYPE_POLICY_GET, NECP_PACKET_FLAGS_RESPONSE, message_id);
- cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_ORDER, sizeof(necp_policy_order), &policy->order);
+ // LOCK
+ lck_rw_lock_shared(&necp_kernel_policy_lock);
- if (result_tlv_size) {
- cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_RESULT, policy->result_size, &policy->result);
+ if (necp_debug) {
+ NECPLOG0(LOG_DEBUG, "Gathering policies");
}
- if (policy->conditions_size) {
- memcpy(((u_int8_t *)(void *)(cursor)), policy->conditions, policy->conditions_size);
+
+ policy_count = necp_kernel_application_policies_count;
+
+ MALLOC(tlv_buffer_pointers, u_int8_t * *, sizeof(u_int8_t *) * policy_count, M_NECP, M_NOWAIT | M_ZERO);
+ if (tlv_buffer_pointers == NULL) {
+ NECPLOG(LOG_DEBUG, "Failed to allocate tlv_buffer_pointers (%lu bytes)", sizeof(u_int8_t *) * policy_count);
+ UNLOCK_AND_REPORT_ERROR(&necp_kernel_policy_lock, NECP_ERROR_INTERNAL);
}
- if (!necp_send_ctl_data(session, (u_int8_t *)response, response_size)) {
- NECPLOG0(LOG_ERR, "Failed to send response");
+ MALLOC(tlv_buffer_lengths, u_int32_t *, sizeof(u_int32_t) * policy_count, M_NECP, M_NOWAIT | M_ZERO);
+ if (tlv_buffer_lengths == NULL) {
+ NECPLOG(LOG_DEBUG, "Failed to allocate tlv_buffer_lengths (%lu bytes)", sizeof(u_int32_t) * policy_count);
+ UNLOCK_AND_REPORT_ERROR(&necp_kernel_policy_lock, NECP_ERROR_INTERNAL);
}
- FREE(response, M_NECP);
- return;
+ for (policy_i = 0; necp_kernel_socket_policies_app_layer_map != NULL && necp_kernel_socket_policies_app_layer_map[policy_i] != NULL; policy_i++) {
+ policy = necp_kernel_socket_policies_app_layer_map[policy_i];
-fail:
- necp_send_error_response(session, NECP_PACKET_TYPE_POLICY_GET, message_id, response_error);
-}
+ memset(result_string, 0, MAX_RESULT_STRING_LEN);
+ memset(proc_name_string, 0, MAXCOMLEN + 1);
-static void
-necp_handle_policy_delete(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset)
-{
- int error;
- u_int32_t response_error = NECP_ERROR_INTERNAL;
- necp_policy_id policy_id = 0;
+ necp_get_result_description(result_string, policy->result, policy->result_parameter);
+ proc_name(policy->session_pid, proc_name_string, MAXCOMLEN);
- struct necp_session_policy *policy = NULL;
+ u_int16_t proc_name_len = strlen(proc_name_string) + 1;
+ u_int16_t result_string_len = strlen(result_string) + 1;
- // Read policy id
- error = necp_packet_get_tlv(packet, offset, NECP_TLV_POLICY_ID, sizeof(policy_id), &policy_id, NULL);
- if (error) {
- NECPLOG(LOG_ERR, "Failed to get policy id: %d", error);
- response_error = NECP_ERROR_INVALID_TLV;
- goto fail;
- }
+ if (necp_debug) {
+ NECPLOG(LOG_DEBUG, "Policy: process: %s, result: %s", proc_name_string, result_string);
+ }
+
+ u_int32_t total_allocated_bytes = sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(policy->id) + // NECP_TLV_POLICY_ID
+ sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(policy->order) + // NECP_TLV_POLICY_ORDER
+ sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(policy->session_order) + // NECP_TLV_POLICY_SESSION_ORDER
+ sizeof(u_int8_t) + sizeof(u_int32_t) + result_string_len + // NECP_TLV_POLICY_RESULT_STRING
+ sizeof(u_int8_t) + sizeof(u_int32_t) + proc_name_len + // NECP_TLV_POLICY_OWNER
+ sizeof(u_int8_t) + sizeof(u_int32_t); // NECP_TLV_POLICY_CONDITION
+
+ // We now traverse the condition_mask to see how much space we need to allocate
+ u_int32_t condition_mask = policy->condition_mask;
+ u_int8_t num_conditions = 0;
+ struct necp_string_id_mapping *account_id_entry = NULL;
+ char if_name[IFXNAMSIZ];
+ u_int32_t condition_tlv_length = 0;
+ memset(if_name, 0, sizeof(if_name));
+
+ if (condition_mask == NECP_POLICY_CONDITION_DEFAULT) {
+ num_conditions++;
+ } else {
+ if (condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES) {
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_HAS_CLIENT) {
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) {
+ snprintf(if_name, IFXNAMSIZ, "%s%d", ifnet_name(policy->cond_bound_interface), ifnet_unit(policy->cond_bound_interface));
+ condition_tlv_length += strlen(if_name) + 1;
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_PROTOCOL) {
+ condition_tlv_length += sizeof(policy->cond_protocol);
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_APP_ID) {
+ condition_tlv_length += sizeof(uuid_t);
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) {
+ condition_tlv_length += sizeof(uuid_t);
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_DOMAIN) {
+ u_int32_t domain_len = strlen(policy->cond_domain) + 1;
+ condition_tlv_length += domain_len;
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID) {
+ account_id_entry = necp_lookup_string_with_id_locked(&necp_account_id_list, policy->cond_account_id);
+ u_int32_t account_id_len = 0;
+ if (account_id_entry) {
+ account_id_len = account_id_entry->string ? strlen(account_id_entry->string) + 1 : 0;
+ }
+ condition_tlv_length += account_id_len;
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_PID) {
+ condition_tlv_length += sizeof(pid_t);
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_UID) {
+ condition_tlv_length += sizeof(uid_t);
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS) {
+ condition_tlv_length += sizeof(struct necp_policy_condition_tc_range);
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_ENTITLEMENT) {
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT) {
+ u_int32_t entitlement_len = strlen(policy->cond_custom_entitlement) + 1;
+ condition_tlv_length += entitlement_len;
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_PLATFORM_BINARY) {
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_SDK_VERSION) {
+ condition_tlv_length += sizeof(struct necp_policy_condition_sdk_version);
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) {
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) {
+ if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) {
+ condition_tlv_length += sizeof(struct necp_policy_condition_addr_range);
+ } else {
+ condition_tlv_length += sizeof(struct necp_policy_condition_addr);
+ }
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_START) {
+ if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) {
+ condition_tlv_length += sizeof(struct necp_policy_condition_addr_range);
+ } else {
+ condition_tlv_length += sizeof(struct necp_policy_condition_addr);
+ }
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE) {
+ condition_tlv_length += sizeof(struct necp_policy_condition_agent_type);
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) {
+ condition_tlv_length += sizeof(u_int32_t);
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_EMPTY) {
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_EMPTY) {
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER) {
+ u_int32_t identifier_len = strlen(policy->cond_signing_identifier) + 1;
+ condition_tlv_length += identifier_len;
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) {
+ condition_tlv_length += sizeof(u_int16_t);
+ num_conditions++;
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_IS_LOOPBACK) {
+ num_conditions++;
+ }
+ }
- policy = necp_policy_find(session, policy_id);
- if (policy == NULL || policy->pending_deletion) {
- NECPLOG(LOG_ERR, "Failed to find policy with id %d", policy_id);
- response_error = NECP_ERROR_POLICY_ID_NOT_FOUND;
- goto fail;
- }
+ condition_tlv_length += num_conditions * (sizeof(u_int8_t) + sizeof(u_int32_t)); // These are for the condition TLVs. The space for "value" is already accounted for above.
+ total_allocated_bytes += condition_tlv_length;
- necp_policy_mark_for_deletion(session, policy);
+ u_int8_t *tlv_buffer;
+ MALLOC(tlv_buffer, u_int8_t *, total_allocated_bytes, M_NECP, M_NOWAIT | M_ZERO);
+ if (tlv_buffer == NULL) {
+ NECPLOG(LOG_DEBUG, "Failed to allocate tlv_buffer (%u bytes)", total_allocated_bytes);
+ continue;
+ }
- necp_send_success_response(session, NECP_PACKET_TYPE_POLICY_DELETE, message_id);
- return;
+ u_int8_t *cursor = tlv_buffer;
+ cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_ID, sizeof(policy->id), &policy->id, tlv_buffer, total_allocated_bytes);
+ cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_ORDER, sizeof(necp_policy_order), &policy->order, tlv_buffer, total_allocated_bytes);
+ cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_SESSION_ORDER, sizeof(policy->session_order), &policy->session_order, tlv_buffer, total_allocated_bytes);
+ cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_RESULT_STRING, result_string_len, result_string, tlv_buffer, total_allocated_bytes);
+ cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_OWNER, proc_name_len, proc_name_string, tlv_buffer, total_allocated_bytes);
-fail:
- necp_send_error_response(session, NECP_PACKET_TYPE_POLICY_DELETE, message_id, response_error);
-}
+#define N_QUICK 256
+ u_int8_t q_cond_buf[N_QUICK]; // Minor optimization
-static void
-necp_handle_policy_apply_all(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset)
-{
-#pragma unused(packet, offset)
- necp_policy_apply_all(session);
- necp_send_success_response(session, NECP_PACKET_TYPE_POLICY_APPLY_ALL, message_id);
-}
+ u_int8_t *cond_buf; // To be used for condition TLVs
+ if (condition_tlv_length <= N_QUICK) {
+ cond_buf = q_cond_buf;
+ } else {
+ MALLOC(cond_buf, u_int8_t *, condition_tlv_length, M_NECP, M_NOWAIT);
+ if (cond_buf == NULL) {
+ NECPLOG(LOG_DEBUG, "Failed to allocate cond_buffer (%u bytes)", condition_tlv_length);
+ FREE(tlv_buffer, M_NECP);
+ continue;
+ }
+ }
-static void
-necp_handle_policy_list_all(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset)
-{
-#pragma unused(packet, offset)
- u_int32_t tlv_size = (sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(u_int32_t));
- u_int32_t response_size = 0;
- u_int8_t *response = NULL;
- u_int8_t *cursor = NULL;
- int num_policies = 0;
- int cur_policy_index = 0;
- struct necp_session_policy *policy;
+ memset(cond_buf, 0, condition_tlv_length);
+ u_int8_t *cond_buf_cursor = cond_buf;
+ if (condition_mask == NECP_POLICY_CONDITION_DEFAULT) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_DEFAULT, 0, "", cond_buf, condition_tlv_length);
+ } else {
+ if (condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_ALL_INTERFACES, 0, "", cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_HAS_CLIENT) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_HAS_CLIENT, 0, "", cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_LOCAL_NETWORKS, 0, "", cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_BOUND_INTERFACE, strlen(if_name) + 1,
+ if_name, cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_PROTOCOL) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_IP_PROTOCOL, sizeof(policy->cond_protocol), &policy->cond_protocol,
+ cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_APP_ID) {
+ struct necp_uuid_id_mapping *entry = necp_uuid_lookup_uuid_with_app_id_locked(policy->cond_app_id);
+ if (entry != NULL) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_APPLICATION, sizeof(entry->uuid), entry->uuid,
+ cond_buf, condition_tlv_length);
+ }
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) {
+ struct necp_uuid_id_mapping *entry = necp_uuid_lookup_uuid_with_app_id_locked(policy->cond_real_app_id);
+ if (entry != NULL) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_REAL_APPLICATION, sizeof(entry->uuid), entry->uuid,
+ cond_buf, condition_tlv_length);
+ }
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_DOMAIN) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_DOMAIN, strlen(policy->cond_domain) + 1, policy->cond_domain,
+ cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID) {
+ if (account_id_entry != NULL) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_ACCOUNT, strlen(account_id_entry->string) + 1, account_id_entry->string,
+ cond_buf, condition_tlv_length);
+ }
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_PID) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_PID, sizeof(policy->cond_pid), &policy->cond_pid,
+ cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_UID) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_UID, sizeof(policy->cond_uid), &policy->cond_uid,
+ cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_TRAFFIC_CLASS, sizeof(policy->cond_traffic_class), &policy->cond_traffic_class,
+ cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_ENTITLEMENT) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_ENTITLEMENT, 0, "",
+ cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_ENTITLEMENT, strlen(policy->cond_custom_entitlement) + 1, policy->cond_custom_entitlement,
+ cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_PLATFORM_BINARY) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_PLATFORM_BINARY, 0, "", cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_SDK_VERSION) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_SDK_VERSION,
+ sizeof(policy->cond_sdk_version), &policy->cond_sdk_version,
+ cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) {
+ if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) {
+ struct necp_policy_condition_addr_range range;
+ memcpy(&range.start_address, &policy->cond_local_start, sizeof(policy->cond_local_start));
+ memcpy(&range.end_address, &policy->cond_local_end, sizeof(policy->cond_local_end));
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_LOCAL_ADDR_RANGE, sizeof(range), &range,
+ cond_buf, condition_tlv_length);
+ } else {
+ struct necp_policy_condition_addr addr;
+ addr.prefix = policy->cond_local_prefix;
+ memcpy(&addr.address, &policy->cond_local_start, sizeof(policy->cond_local_start));
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_LOCAL_ADDR, sizeof(addr), &addr,
+ cond_buf, condition_tlv_length);
+ }
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_START) {
+ if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) {
+ struct necp_policy_condition_addr_range range;
+ memcpy(&range.start_address, &policy->cond_remote_start, sizeof(policy->cond_remote_start));
+ memcpy(&range.end_address, &policy->cond_remote_end, sizeof(policy->cond_remote_end));
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_REMOTE_ADDR_RANGE, sizeof(range), &range,
+ cond_buf, condition_tlv_length);
+ } else {
+ struct necp_policy_condition_addr addr;
+ addr.prefix = policy->cond_remote_prefix;
+ memcpy(&addr.address, &policy->cond_remote_start, sizeof(policy->cond_remote_start));
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_REMOTE_ADDR, sizeof(addr), &addr,
+ cond_buf, condition_tlv_length);
+ }
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_AGENT_TYPE,
+ sizeof(policy->cond_agent_type), &policy->cond_agent_type,
+ cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_CLIENT_FLAGS, sizeof(policy->cond_client_flags), &policy->cond_client_flags, cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_EMPTY) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_EMPTY, 0, "", cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_EMPTY) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_EMPTY, 0, "", cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_SIGNING_IDENTIFIER, strlen(policy->cond_signing_identifier) + 1, policy->cond_signing_identifier,
+ cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_PACKET_FILTER_TAGS, sizeof(policy->cond_packet_filter_tags), &policy->cond_packet_filter_tags, cond_buf, condition_tlv_length);
+ }
+ if (condition_mask & NECP_KERNEL_CONDITION_IS_LOOPBACK) {
+ cond_buf_cursor = necp_buffer_write_tlv(cond_buf_cursor, NECP_POLICY_CONDITION_FLOW_IS_LOOPBACK, 0, "", cond_buf, condition_tlv_length);
+ }
+ }
- LIST_FOREACH(policy, &session->policies, chain) {
- if (!policy->pending_deletion) {
- num_policies++;
+ cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_CONDITION, cond_buf_cursor - cond_buf, cond_buf, tlv_buffer, total_allocated_bytes);
+ if (cond_buf != q_cond_buf) {
+ FREE(cond_buf, M_NECP);
}
- }
- // Create a response with one Policy ID TLV for each policy
- response_size = sizeof(struct necp_packet_header) + num_policies * tlv_size;
- MALLOC(response, u_int8_t *, response_size, M_NECP, M_WAITOK);
- if (response == NULL) {
- necp_send_error_response(session, NECP_PACKET_TYPE_POLICY_LIST_ALL, message_id, NECP_ERROR_INTERNAL);
- return;
+ tlv_buffer_pointers[policy_i] = tlv_buffer;
+ tlv_buffer_lengths[policy_i] = (cursor - tlv_buffer);
+
+ // This is the length of the TLV for NECP_TLV_POLICY_DUMP
+ total_tlv_len += sizeof(u_int8_t) + sizeof(u_int32_t) + (cursor - tlv_buffer);
}
- cursor = response;
- cursor = necp_buffer_write_packet_header(cursor, NECP_PACKET_TYPE_POLICY_LIST_ALL, NECP_PACKET_FLAGS_RESPONSE, message_id);
+ // UNLOCK
+ lck_rw_done(&necp_kernel_policy_lock);
- LIST_FOREACH(policy, &session->policies, chain) {
- if (!policy->pending_deletion && cur_policy_index < num_policies) {
- cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_ID, sizeof(u_int32_t), &policy->id);
- cur_policy_index++;
+ // Copy out
+ if (out_buffer != 0) {
+ if (out_buffer_length < total_tlv_len + sizeof(u_int32_t)) {
+ NECPLOG(LOG_DEBUG, "out_buffer_length too small (%lu < %lu)", out_buffer_length, total_tlv_len + sizeof(u_int32_t));
+ REPORT_ERROR(NECP_ERROR_INVALID_TLV);
}
- }
- if (!necp_send_ctl_data(session, (u_int8_t *)response, response_size)) {
- NECPLOG0(LOG_ERR, "Failed to send response");
- }
+ // Allow malloc to wait, since the total buffer may be large and we are not holding any locks
+ MALLOC(result_buf, u_int8_t *, total_tlv_len + sizeof(u_int32_t), M_NECP, M_WAITOK | M_ZERO);
+ if (result_buf == NULL) {
+ NECPLOG(LOG_DEBUG, "Failed to allocate result_buffer (%lu bytes)", total_tlv_len + sizeof(u_int32_t));
+ REPORT_ERROR(NECP_ERROR_INTERNAL);
+ }
- FREE(response, M_NECP);
-}
+ // Add four bytes for total length at the start
+ memcpy(result_buf, &total_tlv_len, sizeof(u_int32_t));
-static void
-necp_handle_policy_delete_all(struct necp_session *session, u_int32_t message_id, mbuf_t packet, int offset)
-{
-#pragma unused(packet, offset)
- necp_policy_mark_all_for_deletion(session);
- necp_send_success_response(session, NECP_PACKET_TYPE_POLICY_DELETE_ALL, message_id);
-}
+ // Copy the TLVs
+ result_buf_cursor = result_buf + sizeof(u_int32_t);
+ for (int i = 0; i < policy_count; i++) {
+ if (tlv_buffer_pointers[i] != NULL) {
+ result_buf_cursor = necp_buffer_write_tlv(result_buf_cursor, NECP_TLV_POLICY_DUMP, tlv_buffer_lengths[i], tlv_buffer_pointers[i],
+ result_buf, total_tlv_len + sizeof(u_int32_t));
+ }
+ }
-static necp_policy_id
-necp_policy_get_new_id(void)
-{
- necp_policy_id newid = 0;
+ int copy_error = copyout(result_buf, out_buffer, total_tlv_len + sizeof(u_int32_t));
+ if (copy_error) {
+ NECPLOG(LOG_DEBUG, "Failed to copy out result_buffer (%lu bytes)", total_tlv_len + sizeof(u_int32_t));
+ REPORT_ERROR(NECP_ERROR_INTERNAL);
+ }
+ }
- lck_rw_lock_exclusive(&necp_kernel_policy_lock);
+done:
- necp_last_policy_id++;
- if (necp_last_policy_id < 1) {
- necp_last_policy_id = 1;
+ if (error_occured) {
+ error_code = necp_get_posix_error_for_necp_error(response_error);
}
- newid = necp_last_policy_id;
- lck_rw_done(&necp_kernel_policy_lock);
+ if (result_buf != NULL) {
+ FREE(result_buf, M_NECP);
+ }
- if (newid == 0) {
- NECPLOG0(LOG_DEBUG, "Allocate policy id failed.\n");
- return (0);
+ if (tlv_buffer_pointers != NULL) {
+ for (int i = 0; i < policy_count; i++) {
+ if (tlv_buffer_pointers[i] != NULL) {
+ FREE(tlv_buffer_pointers[i], M_NECP);
+ tlv_buffer_pointers[i] = NULL;
+ }
+ }
+ FREE(tlv_buffer_pointers, M_NECP);
+ }
+
+ if (tlv_buffer_lengths != NULL) {
+ FREE(tlv_buffer_lengths, M_NECP);
}
+#undef N_QUICK
+#undef RESET_COND_BUF
+#undef REPORT_ERROR
+#undef UNLOCK_AND_REPORT_ERROR
- return (newid);
+ return error_code;
}
static struct necp_session_policy *
goto done;
}
- MALLOC_ZONE(new_policy, struct necp_session_policy *, sizeof(*new_policy), M_NECP_SESSION_POLICY, M_WAITOK);
- if (new_policy == NULL) {
- goto done;
- }
-
- memset(new_policy, 0, sizeof(*new_policy));
+ new_policy = zalloc_flags(necp_session_policy_zone, Z_WAITOK | Z_ZERO);
new_policy->applied = FALSE;
new_policy->pending_deletion = FALSE;
new_policy->pending_update = FALSE;
new_policy->route_rules_size = route_rules_array_size;
new_policy->result = result;
new_policy->result_size = result_size;
- new_policy->id = necp_policy_get_new_id();
+ new_policy->local_id = necp_policy_get_new_id(session);
LIST_INSERT_SORTED_ASCENDING(&session->policies, new_policy, chain, order, tmp_policy);
NECPLOG(LOG_DEBUG, "Created NECP policy, order %d", order);
}
done:
- return (new_policy);
+ return new_policy;
}
static struct necp_session_policy *
{
struct necp_session_policy *policy = NULL;
if (policy_id == 0) {
- return (NULL);
+ return NULL;
}
LIST_FOREACH(policy, &session->policies, chain) {
- if (policy->id == policy_id) {
- return (policy);
+ if (policy->local_id == policy_id) {
+ return policy;
}
}
- return (NULL);
+ return NULL;
}
static inline u_int8_t
necp_policy_get_result_type(struct necp_session_policy *policy)
{
- return (policy ? necp_policy_result_get_type_from_buffer(policy->result, policy->result_size) : 0);
+ return policy ? necp_policy_result_get_type_from_buffer(policy->result, policy->result_size) : 0;
}
static inline u_int32_t
necp_policy_get_result_parameter_length(struct necp_session_policy *policy)
{
- return (policy ? necp_policy_result_get_parameter_length_from_buffer(policy->result, policy->result_size) : 0);
+ return policy ? necp_policy_result_get_parameter_length_from_buffer(policy->result, policy->result_size) : 0;
}
static bool
u_int8_t *parameter = necp_policy_result_get_parameter_pointer_from_buffer(policy->result, policy->result_size);
if (parameter && parameter_buffer) {
memcpy(parameter_buffer, parameter, parameter_length);
- return (TRUE);
+ return TRUE;
}
}
}
- return (FALSE);
+ return FALSE;
}
static bool
necp_policy_mark_for_deletion(struct necp_session *session, struct necp_session_policy *policy)
{
if (session == NULL || policy == NULL) {
- return (FALSE);
+ return FALSE;
}
policy->pending_deletion = TRUE;
if (necp_debug) {
NECPLOG0(LOG_DEBUG, "Marked NECP policy for removal");
}
- return (TRUE);
+ return TRUE;
}
static bool
necp_policy_mark_for_deletion(session, policy);
}
- return (TRUE);
+ return TRUE;
}
static bool
necp_policy_delete(struct necp_session *session, struct necp_session_policy *policy)
{
if (session == NULL || policy == NULL) {
- return (FALSE);
+ return FALSE;
}
LIST_REMOVE(policy, chain);
policy->conditions = NULL;
}
- FREE_ZONE(policy, sizeof(*policy), M_NECP_SESSION_POLICY);
+ if (policy->route_rules) {
+ FREE(policy->route_rules, M_NECP);
+ policy->route_rules = NULL;
+ }
+
+ zfree(necp_session_policy_zone, policy);
if (necp_debug) {
NECPLOG0(LOG_DEBUG, "Removed NECP policy");
}
- return (TRUE);
+ return TRUE;
}
static bool
{
int i = 0;
if (policy == NULL) {
- return (FALSE);
+ return FALSE;
}
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
// Release local uuid mappings
if (!uuid_is_null(policy->applied_app_uuid)) {
policy->applied = FALSE;
- return (TRUE);
+ return TRUE;
}
-#define NECP_KERNEL_POLICY_SUBORDER_ID_TUNNEL_CONDITION 0
-#define NECP_KERNEL_POLICY_SUBORDER_NON_ID_TUNNEL_CONDITION 1
-#define NECP_KERNEL_POLICY_SUBORDER_ID_CONDITION 2
-#define NECP_KERNEL_POLICY_SUBORDER_NON_ID_CONDITIONS 3
+#define NECP_KERNEL_POLICY_SUBORDER_ID_TUNNEL_CONDITION 0
+#define NECP_KERNEL_POLICY_SUBORDER_NON_ID_TUNNEL_CONDITION 1
+#define NECP_KERNEL_POLICY_SUBORDER_ID_CONDITION 2
+#define NECP_KERNEL_POLICY_SUBORDER_NON_ID_CONDITIONS 3
struct necp_policy_result_ip_tunnel {
u_int32_t secondary_result;
char interface_name[IFXNAMSIZ];
bool socket_layer_non_id_conditions = FALSE;
bool ip_output_layer_non_id_conditions = FALSE;
+ bool ip_output_layer_non_id_only = FALSE;
bool ip_output_layer_id_condition = FALSE;
bool ip_output_layer_tunnel_condition_from_id = FALSE;
bool ip_output_layer_tunnel_condition_from_non_id = FALSE;
ifnet_t cond_bound_interface = NULL;
u_int32_t cond_account_id = 0;
char *cond_domain = NULL;
+ char *cond_custom_entitlement = NULL;
+ char *cond_signing_identifier = NULL;
pid_t cond_pid = 0;
uid_t cond_uid = 0;
necp_app_id cond_app_id = 0;
union necp_sockaddr_union cond_remote_start;
union necp_sockaddr_union cond_remote_end;
u_int8_t cond_remote_prefix = 0;
+ u_int32_t cond_client_flags = 0;
u_int32_t offset = 0;
u_int8_t ultimate_result = 0;
u_int32_t secondary_result = 0;
+ struct necp_policy_condition_agent_type cond_agent_type = {};
+ struct necp_policy_condition_sdk_version cond_sdk_version = {};
+ u_int16_t cond_packet_filter_tags = 0;
necp_kernel_policy_result_parameter secondary_result_parameter;
memset(&secondary_result_parameter, 0, sizeof(secondary_result_parameter));
u_int32_t cond_last_interface_index = 0;
memset(&ultimate_result_parameter, 0, sizeof(ultimate_result_parameter));
if (policy == NULL) {
- return (FALSE);
+ return FALSE;
}
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
// Process conditions
while (offset < policy->conditions_size) {
u_int32_t condition_length = necp_policy_condition_get_value_length_from_buffer(value, length);
u_int8_t *condition_value = necp_policy_condition_get_value_pointer_from_buffer(value, length);
switch (condition_type) {
- case NECP_POLICY_CONDITION_DEFAULT: {
- socket_ip_conditions = TRUE;
- break;
- }
- case NECP_POLICY_CONDITION_ALL_INTERFACES: {
- master_condition_mask |= NECP_KERNEL_CONDITION_ALL_INTERFACES;
- socket_ip_conditions = TRUE;
- break;
- }
- case NECP_POLICY_CONDITION_ENTITLEMENT: {
- master_condition_mask |= NECP_KERNEL_CONDITION_ENTITLEMENT;
- socket_only_conditions = TRUE;
- break;
- }
- case NECP_POLICY_CONDITION_DOMAIN: {
- // Make sure there is only one such rule
- if (condition_length > 0 && cond_domain == NULL) {
- cond_domain = necp_create_trimmed_domain((char *)condition_value, condition_length);
- if (cond_domain != NULL) {
- master_condition_mask |= NECP_KERNEL_CONDITION_DOMAIN;
- if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_DOMAIN;
- }
+ case NECP_POLICY_CONDITION_DEFAULT: {
+ socket_ip_conditions = TRUE;
+ break;
+ }
+ case NECP_POLICY_CONDITION_ALL_INTERFACES: {
+ master_condition_mask |= NECP_KERNEL_CONDITION_ALL_INTERFACES;
+ socket_ip_conditions = TRUE;
+ break;
+ }
+ case NECP_POLICY_CONDITION_HAS_CLIENT: {
+ master_condition_mask |= NECP_KERNEL_CONDITION_HAS_CLIENT;
+ socket_only_conditions = TRUE;
+ break;
+ }
+ case NECP_POLICY_CONDITION_ENTITLEMENT: {
+ if (condition_length > 0) {
+ if (cond_custom_entitlement == NULL) {
+ cond_custom_entitlement = necp_copy_string((char *)condition_value, condition_length);
+ if (cond_custom_entitlement != NULL) {
+ master_condition_mask |= NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT;
socket_only_conditions = TRUE;
}
}
- break;
+ } else {
+ master_condition_mask |= NECP_KERNEL_CONDITION_ENTITLEMENT;
+ socket_only_conditions = TRUE;
}
- case NECP_POLICY_CONDITION_ACCOUNT: {
- // Make sure there is only one such rule
- if (condition_length > 0 && cond_account_id == 0 && policy->applied_account == NULL) {
- char *string = NULL;
- MALLOC(string, char *, condition_length + 1, M_NECP, M_WAITOK);
- if (string != NULL) {
- memcpy(string, condition_value, condition_length);
- string[condition_length] = 0;
- cond_account_id = necp_create_string_to_id_mapping(&necp_account_id_list, string);
- if (cond_account_id != 0) {
- policy->applied_account = string; // Save the string in parent policy
- master_condition_mask |= NECP_KERNEL_CONDITION_ACCOUNT_ID;
- if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_ACCOUNT_ID;
- }
- socket_only_conditions = TRUE;
- } else {
- FREE(string, M_NECP);
- }
- }
- }
- break;
+ break;
+ }
+ case NECP_POLICY_CONDITION_PLATFORM_BINARY: {
+ master_condition_mask |= NECP_KERNEL_CONDITION_PLATFORM_BINARY;
+ socket_only_conditions = TRUE;
+ break;
+ }
+ case NECP_POLICY_CONDITION_SDK_VERSION: {
+ if (condition_length >= sizeof(cond_sdk_version)) {
+ master_condition_mask |= NECP_KERNEL_CONDITION_SDK_VERSION;
+ memcpy(&cond_sdk_version, condition_value, sizeof(cond_sdk_version));
+ socket_only_conditions = TRUE;
}
- case NECP_POLICY_CONDITION_APPLICATION: {
- // Make sure there is only one such rule, because we save the uuid in the policy
- if (condition_length >= sizeof(uuid_t) && cond_app_id == 0) {
- bool allocated_mapping = FALSE;
- uuid_t application_uuid;
- memcpy(application_uuid, condition_value, sizeof(uuid_t));
- cond_app_id = necp_create_uuid_app_id_mapping(application_uuid, &allocated_mapping, TRUE);
- if (cond_app_id != 0) {
- if (allocated_mapping) {
- necp_uuid_app_id_mappings_dirty = TRUE;
- necp_num_uuid_app_id_mappings++;
- }
- uuid_copy(policy->applied_app_uuid, application_uuid);
- master_condition_mask |= NECP_KERNEL_CONDITION_APP_ID;
- if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_APP_ID;
- }
- socket_only_conditions = TRUE;
+ break;
+ }
+ case NECP_POLICY_CONDITION_DOMAIN: {
+ // Make sure there is only one such rule
+ if (condition_length > 0 && cond_domain == NULL) {
+ cond_domain = necp_create_trimmed_domain((char *)condition_value, condition_length);
+ if (cond_domain != NULL) {
+ master_condition_mask |= NECP_KERNEL_CONDITION_DOMAIN;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_DOMAIN;
}
+ socket_only_conditions = TRUE;
}
- break;
}
- case NECP_POLICY_CONDITION_REAL_APPLICATION: {
- // Make sure there is only one such rule, because we save the uuid in the policy
- if (condition_length >= sizeof(uuid_t) && cond_real_app_id == 0) {
- uuid_t real_application_uuid;
- memcpy(real_application_uuid, condition_value, sizeof(uuid_t));
- cond_real_app_id = necp_create_uuid_app_id_mapping(real_application_uuid, NULL, FALSE);
- if (cond_real_app_id != 0) {
- uuid_copy(policy->applied_real_app_uuid, real_application_uuid);
- master_condition_mask |= NECP_KERNEL_CONDITION_REAL_APP_ID;
+ break;
+ }
+ case NECP_POLICY_CONDITION_ACCOUNT: {
+ // Make sure there is only one such rule
+ if (condition_length > 0 && cond_account_id == 0 && policy->applied_account == NULL) {
+ char *string = NULL;
+ MALLOC(string, char *, condition_length + 1, M_NECP, M_WAITOK);
+ if (string != NULL) {
+ memcpy(string, condition_value, condition_length);
+ string[condition_length] = 0;
+ cond_account_id = necp_create_string_to_id_mapping(&necp_account_id_list, string);
+ if (cond_account_id != 0) {
+ policy->applied_account = string; // Save the string in parent policy
+ master_condition_mask |= NECP_KERNEL_CONDITION_ACCOUNT_ID;
if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_REAL_APP_ID;
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_ACCOUNT_ID;
}
socket_only_conditions = TRUE;
+ } else {
+ FREE(string, M_NECP);
}
}
- break;
}
- case NECP_POLICY_CONDITION_PID: {
- if (condition_length >= sizeof(pid_t)) {
- master_condition_mask |= NECP_KERNEL_CONDITION_PID;
+ break;
+ }
+ case NECP_POLICY_CONDITION_APPLICATION: {
+ // Make sure there is only one such rule, because we save the uuid in the policy
+ if (condition_length >= sizeof(uuid_t) && cond_app_id == 0) {
+ bool allocated_mapping = FALSE;
+ uuid_t application_uuid;
+ memcpy(application_uuid, condition_value, sizeof(uuid_t));
+ cond_app_id = necp_create_uuid_app_id_mapping(application_uuid, &allocated_mapping, TRUE);
+ if (cond_app_id != 0) {
+ if (allocated_mapping) {
+ necp_uuid_app_id_mappings_dirty = TRUE;
+ necp_num_uuid_app_id_mappings++;
+ }
+ uuid_copy(policy->applied_app_uuid, application_uuid);
+ master_condition_mask |= NECP_KERNEL_CONDITION_APP_ID;
if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_PID;
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_APP_ID;
}
- memcpy(&cond_pid, condition_value, sizeof(cond_pid));
socket_only_conditions = TRUE;
}
- break;
}
- case NECP_POLICY_CONDITION_UID: {
- if (condition_length >= sizeof(uid_t)) {
- master_condition_mask |= NECP_KERNEL_CONDITION_UID;
+ break;
+ }
+ case NECP_POLICY_CONDITION_REAL_APPLICATION: {
+ // Make sure there is only one such rule, because we save the uuid in the policy
+ if (condition_length >= sizeof(uuid_t) && cond_real_app_id == 0) {
+ uuid_t real_application_uuid;
+ memcpy(real_application_uuid, condition_value, sizeof(uuid_t));
+ cond_real_app_id = necp_create_uuid_app_id_mapping(real_application_uuid, NULL, FALSE);
+ if (cond_real_app_id != 0) {
+ uuid_copy(policy->applied_real_app_uuid, real_application_uuid);
+ master_condition_mask |= NECP_KERNEL_CONDITION_REAL_APP_ID;
if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_UID;
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_REAL_APP_ID;
}
- memcpy(&cond_uid, condition_value, sizeof(cond_uid));
socket_only_conditions = TRUE;
}
- break;
}
- case NECP_POLICY_CONDITION_TRAFFIC_CLASS: {
- if (condition_length >= sizeof(struct necp_policy_condition_tc_range)) {
- master_condition_mask |= NECP_KERNEL_CONDITION_TRAFFIC_CLASS;
- if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_TRAFFIC_CLASS;
- }
- memcpy(&cond_traffic_class, condition_value, sizeof(cond_traffic_class));
- socket_only_conditions = TRUE;
+ break;
+ }
+ case NECP_POLICY_CONDITION_PID: {
+ if (condition_length >= sizeof(pid_t)) {
+ master_condition_mask |= NECP_KERNEL_CONDITION_PID;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_PID;
}
- break;
+ memcpy(&cond_pid, condition_value, sizeof(cond_pid));
+ socket_only_conditions = TRUE;
}
- case NECP_POLICY_CONDITION_BOUND_INTERFACE: {
- if (condition_length <= IFXNAMSIZ && condition_length > 0) {
- char interface_name[IFXNAMSIZ];
- memcpy(interface_name, condition_value, condition_length);
- interface_name[condition_length - 1] = 0; // Make sure the string is NULL terminated
- if (ifnet_find_by_name(interface_name, &cond_bound_interface) == 0) {
- master_condition_mask |= NECP_KERNEL_CONDITION_BOUND_INTERFACE;
- if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_BOUND_INTERFACE;
- }
- }
- socket_ip_conditions = TRUE;
+ break;
+ }
+ case NECP_POLICY_CONDITION_UID: {
+ if (condition_length >= sizeof(uid_t)) {
+ master_condition_mask |= NECP_KERNEL_CONDITION_UID;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_UID;
}
- break;
+ memcpy(&cond_uid, condition_value, sizeof(cond_uid));
+ socket_only_conditions = TRUE;
+ }
+ break;
+ }
+ case NECP_POLICY_CONDITION_TRAFFIC_CLASS: {
+ if (condition_length >= sizeof(struct necp_policy_condition_tc_range)) {
+ master_condition_mask |= NECP_KERNEL_CONDITION_TRAFFIC_CLASS;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_TRAFFIC_CLASS;
+ }
+ memcpy(&cond_traffic_class, condition_value, sizeof(cond_traffic_class));
+ socket_only_conditions = TRUE;
}
- case NECP_POLICY_CONDITION_IP_PROTOCOL: {
- if (condition_length >= sizeof(u_int16_t)) {
- master_condition_mask |= NECP_KERNEL_CONDITION_PROTOCOL;
+ break;
+ }
+ case NECP_POLICY_CONDITION_BOUND_INTERFACE: {
+ if (condition_length <= IFXNAMSIZ && condition_length > 0) {
+ char interface_name[IFXNAMSIZ];
+ memcpy(interface_name, condition_value, condition_length);
+ interface_name[condition_length - 1] = 0; // Make sure the string is NULL terminated
+ if (ifnet_find_by_name(interface_name, &cond_bound_interface) == 0) {
+ master_condition_mask |= NECP_KERNEL_CONDITION_BOUND_INTERFACE;
if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_PROTOCOL;
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_BOUND_INTERFACE;
}
- memcpy(&cond_protocol, condition_value, sizeof(cond_protocol));
- socket_ip_conditions = TRUE;
}
- break;
+ socket_ip_conditions = TRUE;
}
- case NECP_POLICY_CONDITION_LOCAL_ADDR: {
- struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)condition_value;
- cond_local_prefix = address_struct->prefix;
- memcpy(&cond_local_start, &address_struct->address, sizeof(address_struct->address));
- master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_START;
- master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_PREFIX;
+ break;
+ }
+ case NECP_POLICY_CONDITION_IP_PROTOCOL:
+ case NECP_POLICY_CONDITION_FLOW_IP_PROTOCOL: {
+ if (condition_length >= sizeof(u_int16_t)) {
+ master_condition_mask |= NECP_KERNEL_CONDITION_PROTOCOL;
if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_START;
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_PREFIX;
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_PROTOCOL;
}
- socket_ip_conditions = TRUE;
+ memcpy(&cond_protocol, condition_value, sizeof(cond_protocol));
+ if (condition_type == NECP_POLICY_CONDITION_FLOW_IP_PROTOCOL) {
+ socket_only_conditions = TRUE;
+ } else {
+ socket_ip_conditions = TRUE;
+ }
+ }
+ break;
+ }
+ case NECP_POLICY_CONDITION_LOCAL_NETWORKS: {
+ master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_NETWORKS;
+ socket_ip_conditions = TRUE;
+ break;
+ }
+ case NECP_POLICY_CONDITION_LOCAL_ADDR:
+ case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR: {
+ struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)condition_value;
+ if (!necp_address_is_valid(&address_struct->address.sa)) {
break;
}
- case NECP_POLICY_CONDITION_REMOTE_ADDR: {
- struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)condition_value;
- cond_remote_prefix = address_struct->prefix;
- memcpy(&cond_remote_start, &address_struct->address, sizeof(address_struct->address));
- master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_START;
- master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_PREFIX;
- if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_START;
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_PREFIX;
- }
+
+ cond_local_prefix = address_struct->prefix;
+ memcpy(&cond_local_start, &address_struct->address, sizeof(address_struct->address));
+ master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_START;
+ master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_PREFIX;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_START;
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_PREFIX;
+ }
+ if (condition_type == NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR) {
+ socket_only_conditions = TRUE;
+ } else {
socket_ip_conditions = TRUE;
+ }
+ break;
+ }
+ case NECP_POLICY_CONDITION_REMOTE_ADDR:
+ case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR: {
+ struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)condition_value;
+ if (!necp_address_is_valid(&address_struct->address.sa)) {
break;
}
- case NECP_POLICY_CONDITION_LOCAL_ADDR_RANGE: {
- struct necp_policy_condition_addr_range *address_struct = (struct necp_policy_condition_addr_range *)(void *)condition_value;
- memcpy(&cond_local_start, &address_struct->start_address, sizeof(address_struct->start_address));
- memcpy(&cond_local_end, &address_struct->end_address, sizeof(address_struct->end_address));
- master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_START;
- master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_END;
- if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_START;
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_END;
- }
+
+ cond_remote_prefix = address_struct->prefix;
+ memcpy(&cond_remote_start, &address_struct->address, sizeof(address_struct->address));
+ master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_START;
+ master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_PREFIX;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_START;
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_PREFIX;
+ }
+ if (condition_type == NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR) {
+ socket_only_conditions = TRUE;
+ } else {
socket_ip_conditions = TRUE;
+ }
+ break;
+ }
+ case NECP_POLICY_CONDITION_LOCAL_ADDR_RANGE:
+ case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_RANGE: {
+ struct necp_policy_condition_addr_range *address_struct = (struct necp_policy_condition_addr_range *)(void *)condition_value;
+ if (!necp_address_is_valid(&address_struct->start_address.sa) ||
+ !necp_address_is_valid(&address_struct->end_address.sa)) {
break;
}
- case NECP_POLICY_CONDITION_REMOTE_ADDR_RANGE: {
- struct necp_policy_condition_addr_range *address_struct = (struct necp_policy_condition_addr_range *)(void *)condition_value;
- memcpy(&cond_remote_start, &address_struct->start_address, sizeof(address_struct->start_address));
- memcpy(&cond_remote_end, &address_struct->end_address, sizeof(address_struct->end_address));
- master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_START;
- master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_END;
- if (condition_is_negative) {
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_START;
- master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_END;
- }
+
+ memcpy(&cond_local_start, &address_struct->start_address, sizeof(address_struct->start_address));
+ memcpy(&cond_local_end, &address_struct->end_address, sizeof(address_struct->end_address));
+ master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_START;
+ master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_END;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_START;
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_END;
+ }
+ if (condition_type == NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_RANGE) {
+ socket_only_conditions = TRUE;
+ } else {
socket_ip_conditions = TRUE;
- break;
}
- default: {
+ break;
+ }
+ case NECP_POLICY_CONDITION_REMOTE_ADDR_RANGE:
+ case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_RANGE: {
+ struct necp_policy_condition_addr_range *address_struct = (struct necp_policy_condition_addr_range *)(void *)condition_value;
+ if (!necp_address_is_valid(&address_struct->start_address.sa) ||
+ !necp_address_is_valid(&address_struct->end_address.sa)) {
break;
}
- }
- offset += sizeof(u_int8_t) + sizeof(u_int32_t) + length;
- }
-
- // Process result
- ultimate_result = necp_policy_get_result_type(policy);
- switch (ultimate_result) {
- case NECP_POLICY_RESULT_PASS: {
- if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE
- socket_layer_non_id_conditions = TRUE;
- ip_output_layer_id_condition = TRUE;
- } else if (socket_ip_conditions) {
- socket_layer_non_id_conditions = TRUE;
- ip_output_layer_id_condition = TRUE;
- ip_output_layer_non_id_conditions = TRUE;
+ memcpy(&cond_remote_start, &address_struct->start_address, sizeof(address_struct->start_address));
+ memcpy(&cond_remote_end, &address_struct->end_address, sizeof(address_struct->end_address));
+ master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_START;
+ master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_END;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_START;
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_END;
+ }
+ if (condition_type == NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_RANGE) {
+ socket_only_conditions = TRUE;
+ } else {
+ socket_ip_conditions = TRUE;
}
break;
}
- case NECP_POLICY_RESULT_DROP: {
- if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE
- socket_layer_non_id_conditions = TRUE;
- } else if (socket_ip_conditions) {
- socket_layer_non_id_conditions = TRUE;
- ip_output_layer_non_id_conditions = TRUE;
+ case NECP_POLICY_CONDITION_AGENT_TYPE: {
+ if (condition_length >= sizeof(cond_agent_type)) {
+ master_condition_mask |= NECP_KERNEL_CONDITION_AGENT_TYPE;
+ memcpy(&cond_agent_type, condition_value, sizeof(cond_agent_type));
+ socket_only_conditions = TRUE;
}
break;
}
- case NECP_POLICY_RESULT_SKIP: {
- u_int32_t skip_policy_order = 0;
- if (necp_policy_get_result_parameter(policy, (u_int8_t *)&skip_policy_order, sizeof(skip_policy_order))) {
- ultimate_result_parameter.skip_policy_order = skip_policy_order;
+ case NECP_POLICY_CONDITION_CLIENT_FLAGS: {
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_CLIENT_FLAGS;
}
-
- if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE
- socket_layer_non_id_conditions = TRUE;
- ip_output_layer_id_condition = TRUE;
- } else if (socket_ip_conditions) {
- socket_layer_non_id_conditions = TRUE;
- ip_output_layer_non_id_conditions = TRUE;
+ master_condition_mask |= NECP_KERNEL_CONDITION_CLIENT_FLAGS;
+ socket_only_conditions = TRUE;
+ if (condition_length >= sizeof(u_int32_t)) {
+ memcpy(&cond_client_flags, condition_value, sizeof(cond_client_flags));
+ } else {
+ // Empty means match on fallback traffic
+ cond_client_flags = NECP_CLIENT_PARAMETER_FLAG_FALLBACK_TRAFFIC;
}
break;
}
- case NECP_POLICY_RESULT_SOCKET_DIVERT:
- case NECP_POLICY_RESULT_SOCKET_FILTER: {
- u_int32_t control_unit = 0;
- if (necp_policy_get_result_parameter(policy, (u_int8_t *)&control_unit, sizeof(control_unit))) {
- ultimate_result_parameter.flow_divert_control_unit = control_unit;
+ case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_EMPTY: {
+ master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_EMPTY;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_EMPTY;
}
- socket_layer_non_id_conditions = TRUE;
+ socket_only_conditions = TRUE;
break;
}
- case NECP_POLICY_RESULT_IP_TUNNEL: {
- struct necp_policy_result_ip_tunnel tunnel_parameters;
- u_int32_t tunnel_parameters_length = necp_policy_get_result_parameter_length(policy);
- if (tunnel_parameters_length > sizeof(u_int32_t) &&
- tunnel_parameters_length <= sizeof(struct necp_policy_result_ip_tunnel) &&
- necp_policy_get_result_parameter(policy, (u_int8_t *)&tunnel_parameters, sizeof(tunnel_parameters))) {
- ifnet_t tunnel_interface = NULL;
- tunnel_parameters.interface_name[tunnel_parameters_length - sizeof(u_int32_t) - 1] = 0; // Make sure the string is NULL terminated
- if (ifnet_find_by_name(tunnel_parameters.interface_name, &tunnel_interface) == 0) {
- ultimate_result_parameter.tunnel_interface_index = tunnel_interface->if_index;
- }
-
- secondary_result = tunnel_parameters.secondary_result;
- if (secondary_result) {
- cond_last_interface_index = ultimate_result_parameter.tunnel_interface_index;
- }
- }
-
- if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE
- socket_layer_non_id_conditions = TRUE;
- ip_output_layer_id_condition = TRUE;
- if (secondary_result) {
- ip_output_layer_tunnel_condition_from_id = TRUE;
- }
- } else if (socket_ip_conditions) {
- socket_layer_non_id_conditions = TRUE;
- ip_output_layer_id_condition = TRUE;
- ip_output_layer_non_id_conditions = TRUE;
- if (secondary_result) {
- ip_output_layer_tunnel_condition_from_id = TRUE;
- ip_output_layer_tunnel_condition_from_non_id = TRUE;
- }
+ case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_EMPTY: {
+ master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_EMPTY;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_EMPTY;
}
+ socket_only_conditions = TRUE;
break;
}
- case NECP_POLICY_RESULT_TRIGGER:
- case NECP_POLICY_RESULT_TRIGGER_IF_NEEDED:
- case NECP_POLICY_RESULT_TRIGGER_SCOPED:
- case NECP_POLICY_RESULT_NO_TRIGGER_SCOPED: {
- struct necp_policy_result_service service_parameters;
- u_int32_t service_result_length = necp_policy_get_result_parameter_length(policy);
- bool has_extra_service_data = FALSE;
- if (service_result_length >= (sizeof(service_parameters))) {
- has_extra_service_data = TRUE;
- }
- if (necp_policy_get_result_parameter(policy, (u_int8_t *)&service_parameters, sizeof(service_parameters))) {
- ultimate_result_parameter.service.identifier = necp_create_uuid_service_id_mapping(service_parameters.identifier);
- if (ultimate_result_parameter.service.identifier != 0) {
- uuid_copy(policy->applied_result_uuid, service_parameters.identifier);
- socket_layer_non_id_conditions = TRUE;
- if (has_extra_service_data) {
- ultimate_result_parameter.service.data = service_parameters.data;
- } else {
- ultimate_result_parameter.service.data = 0;
+ case NECP_POLICY_CONDITION_SIGNING_IDENTIFIER: {
+ if (condition_length > 0) {
+ if (cond_signing_identifier == NULL) {
+ cond_signing_identifier = necp_copy_string((char *)condition_value, condition_length);
+ if (cond_signing_identifier != NULL) {
+ master_condition_mask |= NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER;
+ socket_only_conditions = TRUE;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER;
+ }
}
}
}
break;
}
- case NECP_POLICY_RESULT_USE_NETAGENT: {
- uuid_t netagent_uuid;
- if (necp_policy_get_result_parameter(policy, (u_int8_t *)&netagent_uuid, sizeof(netagent_uuid))) {
- ultimate_result_parameter.netagent_id = necp_create_uuid_service_id_mapping(netagent_uuid);
- if (ultimate_result_parameter.netagent_id != 0) {
- uuid_copy(policy->applied_result_uuid, netagent_uuid);
- socket_layer_non_id_conditions = TRUE;
+ case NECP_POLICY_CONDITION_PACKET_FILTER_TAGS: {
+ if (condition_length >= sizeof(u_int16_t)) {
+ master_condition_mask |= NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS;
}
+ memcpy(&cond_packet_filter_tags, condition_value, sizeof(cond_packet_filter_tags));
+ socket_ip_conditions = TRUE;
}
break;
}
- case NECP_POLICY_RESULT_SOCKET_SCOPED: {
- u_int32_t interface_name_length = necp_policy_get_result_parameter_length(policy);
- if (interface_name_length <= IFXNAMSIZ && interface_name_length > 0) {
- char interface_name[IFXNAMSIZ];
- ifnet_t scope_interface = NULL;
- necp_policy_get_result_parameter(policy, (u_int8_t *)interface_name, interface_name_length);
- interface_name[interface_name_length - 1] = 0; // Make sure the string is NULL terminated
- if (ifnet_find_by_name(interface_name, &scope_interface) == 0) {
- ultimate_result_parameter.scoped_interface_index = scope_interface->if_index;
- socket_layer_non_id_conditions = TRUE;
+ case NECP_POLICY_CONDITION_FLOW_IS_LOOPBACK: {
+ master_condition_mask |= NECP_KERNEL_CONDITION_IS_LOOPBACK;
+ if (condition_is_negative) {
+ master_condition_negated_mask |= NECP_KERNEL_CONDITION_IS_LOOPBACK;
+ }
+ socket_only_conditions = TRUE;
+ break;
+ }
+ default: {
+ break;
+ }
+ }
+
+ offset += sizeof(u_int8_t) + sizeof(u_int32_t) + length;
+ }
+
+ // Process result
+ ultimate_result = necp_policy_get_result_type(policy);
+ switch (ultimate_result) {
+ case NECP_POLICY_RESULT_PASS: {
+ u_int32_t pass_flags = 0;
+ if (necp_policy_result_get_parameter_length_from_buffer(policy->result, policy->result_size) > 0) {
+ if (necp_policy_get_result_parameter(policy, (u_int8_t *)&pass_flags, sizeof(pass_flags))) {
+ ultimate_result_parameter.pass_flags = pass_flags;
+ }
+ }
+ if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE
+ socket_layer_non_id_conditions = TRUE;
+ ip_output_layer_id_condition = TRUE;
+ } else if (socket_ip_conditions) {
+ socket_layer_non_id_conditions = TRUE;
+ ip_output_layer_id_condition = TRUE;
+ ip_output_layer_non_id_conditions = TRUE;
+ }
+ break;
+ }
+ case NECP_POLICY_RESULT_DROP: {
+ u_int32_t drop_flags = 0;
+ if (necp_policy_result_get_parameter_length_from_buffer(policy->result, policy->result_size) > 0) {
+ if (necp_policy_get_result_parameter(policy, (u_int8_t *)&drop_flags, sizeof(drop_flags))) {
+ ultimate_result_parameter.drop_flags = drop_flags;
+ }
+ }
+ if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE
+ socket_layer_non_id_conditions = TRUE;
+ } else if (socket_ip_conditions) {
+ socket_layer_non_id_conditions = TRUE;
+ ip_output_layer_non_id_conditions = TRUE;
+ ip_output_layer_non_id_only = TRUE; // Only apply drop to packets that didn't go through socket layer
+ }
+ break;
+ }
+ case NECP_POLICY_RESULT_SKIP: {
+ u_int32_t skip_policy_order = 0;
+ if (necp_policy_get_result_parameter(policy, (u_int8_t *)&skip_policy_order, sizeof(skip_policy_order))) {
+ ultimate_result_parameter.skip_policy_order = skip_policy_order;
+ }
+
+ if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE
+ socket_layer_non_id_conditions = TRUE;
+ ip_output_layer_id_condition = TRUE;
+ } else if (socket_ip_conditions) {
+ socket_layer_non_id_conditions = TRUE;
+ ip_output_layer_non_id_conditions = TRUE;
+ }
+ break;
+ }
+ case NECP_POLICY_RESULT_SOCKET_DIVERT:
+ case NECP_POLICY_RESULT_SOCKET_FILTER: {
+ u_int32_t control_unit = 0;
+ if (necp_policy_get_result_parameter(policy, (u_int8_t *)&control_unit, sizeof(control_unit))) {
+ ultimate_result_parameter.flow_divert_control_unit = control_unit;
+ }
+ socket_layer_non_id_conditions = TRUE;
+ break;
+ }
+ case NECP_POLICY_RESULT_IP_TUNNEL: {
+ struct necp_policy_result_ip_tunnel tunnel_parameters;
+ u_int32_t tunnel_parameters_length = necp_policy_get_result_parameter_length(policy);
+ if (tunnel_parameters_length > sizeof(u_int32_t) &&
+ tunnel_parameters_length <= sizeof(struct necp_policy_result_ip_tunnel) &&
+ necp_policy_get_result_parameter(policy, (u_int8_t *)&tunnel_parameters, sizeof(tunnel_parameters))) {
+ ifnet_t tunnel_interface = NULL;
+ tunnel_parameters.interface_name[tunnel_parameters_length - sizeof(u_int32_t) - 1] = 0; // Make sure the string is NULL terminated
+ if (ifnet_find_by_name(tunnel_parameters.interface_name, &tunnel_interface) == 0) {
+ ultimate_result_parameter.tunnel_interface_index = tunnel_interface->if_index;
+ ifnet_release(tunnel_interface);
+ }
+
+ secondary_result = tunnel_parameters.secondary_result;
+ if (secondary_result) {
+ cond_last_interface_index = ultimate_result_parameter.tunnel_interface_index;
+ }
+ }
+
+ if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE
+ socket_layer_non_id_conditions = TRUE;
+ ip_output_layer_id_condition = TRUE;
+ if (secondary_result) {
+ ip_output_layer_tunnel_condition_from_id = TRUE;
+ }
+ } else if (socket_ip_conditions) {
+ socket_layer_non_id_conditions = TRUE;
+ ip_output_layer_id_condition = TRUE;
+ ip_output_layer_non_id_conditions = TRUE;
+ if (secondary_result) {
+ ip_output_layer_tunnel_condition_from_id = TRUE;
+ ip_output_layer_tunnel_condition_from_non_id = TRUE;
+ }
+ }
+ break;
+ }
+ case NECP_POLICY_RESULT_TRIGGER:
+ case NECP_POLICY_RESULT_TRIGGER_IF_NEEDED:
+ case NECP_POLICY_RESULT_TRIGGER_SCOPED:
+ case NECP_POLICY_RESULT_NO_TRIGGER_SCOPED: {
+ struct necp_policy_result_service service_parameters;
+ u_int32_t service_result_length = necp_policy_get_result_parameter_length(policy);
+ bool has_extra_service_data = FALSE;
+ if (service_result_length >= (sizeof(service_parameters))) {
+ has_extra_service_data = TRUE;
+ }
+ if (necp_policy_get_result_parameter(policy, (u_int8_t *)&service_parameters, sizeof(service_parameters))) {
+ ultimate_result_parameter.service.identifier = necp_create_uuid_service_id_mapping(service_parameters.identifier);
+ if (ultimate_result_parameter.service.identifier != 0) {
+ uuid_copy(policy->applied_result_uuid, service_parameters.identifier);
+ socket_layer_non_id_conditions = TRUE;
+ if (has_extra_service_data) {
+ ultimate_result_parameter.service.data = service_parameters.data;
+ } else {
+ ultimate_result_parameter.service.data = 0;
}
}
}
- case NECP_POLICY_RESULT_ROUTE_RULES: {
- if (policy->route_rules != NULL && policy->route_rules_size > 0) {
- u_int32_t route_rule_id = necp_create_route_rule(&necp_route_rules, policy->route_rules, policy->route_rules_size);
- if (route_rule_id > 0) {
- policy->applied_route_rules_id = route_rule_id;
- ultimate_result_parameter.route_rule_id = route_rule_id;
+ break;
+ }
+ case NECP_POLICY_RESULT_USE_NETAGENT:
+ case NECP_POLICY_RESULT_NETAGENT_SCOPED: {
+ uuid_t netagent_uuid;
+ if (necp_policy_get_result_parameter(policy, (u_int8_t *)&netagent_uuid, sizeof(netagent_uuid))) {
+ ultimate_result_parameter.netagent_id = necp_create_uuid_service_id_mapping(netagent_uuid);
+ if (ultimate_result_parameter.netagent_id != 0) {
+ uuid_copy(policy->applied_result_uuid, netagent_uuid);
+ socket_layer_non_id_conditions = TRUE;
+ }
+ }
+ break;
+ }
+ case NECP_POLICY_RESULT_SOCKET_SCOPED: {
+ u_int32_t interface_name_length = necp_policy_get_result_parameter_length(policy);
+ if (interface_name_length <= IFXNAMSIZ && interface_name_length > 0) {
+ char interface_name[IFXNAMSIZ];
+ ifnet_t scope_interface = NULL;
+ necp_policy_get_result_parameter(policy, (u_int8_t *)interface_name, interface_name_length);
+ interface_name[interface_name_length - 1] = 0; // Make sure the string is NULL terminated
+ if (ifnet_find_by_name(interface_name, &scope_interface) == 0) {
+ ultimate_result_parameter.scoped_interface_index = scope_interface->if_index;
+ socket_layer_non_id_conditions = TRUE;
+ ifnet_release(scope_interface);
+ }
+ }
+ break;
+ }
+ case NECP_POLICY_RESULT_SCOPED_DIRECT: {
+ socket_layer_non_id_conditions = TRUE;
+ break;
+ }
+ case NECP_POLICY_RESULT_ALLOW_UNENTITLED: {
+ socket_layer_non_id_conditions = TRUE;
+ break;
+ }
+ case NECP_POLICY_RESULT_ROUTE_RULES: {
+ if (policy->route_rules != NULL && policy->route_rules_size > 0) {
+ u_int32_t route_rule_id = necp_create_route_rule(&necp_route_rules, policy->route_rules, policy->route_rules_size);
+ if (route_rule_id > 0) {
+ policy->applied_route_rules_id = route_rule_id;
+ ultimate_result_parameter.route_rule_id = route_rule_id;
+ if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE
+ socket_layer_non_id_conditions = TRUE;
+ } else if (socket_ip_conditions) {
socket_layer_non_id_conditions = TRUE;
+ ip_output_layer_non_id_conditions = TRUE;
+ ip_output_layer_non_id_only = TRUE; // Only apply route rules to packets that didn't go through socket layer
}
}
}
- default: {
- break;
- }
+ break;
+ }
+ default: {
+ break;
+ }
}
if (socket_layer_non_id_conditions) {
- necp_kernel_policy_id policy_id = necp_kernel_socket_policy_add(policy->id, policy->order, session->session_order, session->proc_pid, master_condition_mask, master_condition_negated_mask, cond_app_id, cond_real_app_id, cond_account_id, cond_domain, cond_pid, cond_uid, cond_bound_interface, cond_traffic_class, cond_protocol, &cond_local_start, &cond_local_end, cond_local_prefix, &cond_remote_start, &cond_remote_end, cond_remote_prefix, ultimate_result, ultimate_result_parameter);
+ necp_kernel_policy_id policy_id = necp_kernel_socket_policy_add(policy->order, session->session_order, session->proc_pid, master_condition_mask, master_condition_negated_mask, cond_app_id, cond_real_app_id, cond_custom_entitlement, cond_account_id, cond_domain, cond_pid, cond_uid, cond_bound_interface, cond_traffic_class, cond_protocol, &cond_local_start, &cond_local_end, cond_local_prefix, &cond_remote_start, &cond_remote_end, cond_remote_prefix, &cond_agent_type, &cond_sdk_version, cond_client_flags, cond_signing_identifier, cond_packet_filter_tags, ultimate_result, ultimate_result_parameter);
if (policy_id == 0) {
NECPLOG0(LOG_DEBUG, "Error applying socket kernel policy");
}
if (ip_output_layer_non_id_conditions) {
- necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(policy->id, policy->order, NECP_KERNEL_POLICY_SUBORDER_NON_ID_CONDITIONS, session->session_order, session->proc_pid, master_condition_mask, master_condition_negated_mask, NECP_KERNEL_POLICY_ID_NONE, cond_bound_interface, 0, cond_protocol, &cond_local_start, &cond_local_end, cond_local_prefix, &cond_remote_start, &cond_remote_end, cond_remote_prefix, ultimate_result, ultimate_result_parameter);
+ u_int32_t condition_mask = master_condition_mask;
+ if (ip_output_layer_non_id_only) {
+ condition_mask |= NECP_KERNEL_CONDITION_POLICY_ID;
+ }
+
+ necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(policy->order, NECP_KERNEL_POLICY_SUBORDER_NON_ID_CONDITIONS, session->session_order, session->proc_pid, condition_mask, master_condition_negated_mask, NECP_KERNEL_POLICY_ID_NONE, cond_bound_interface, 0, cond_protocol, &cond_local_start, &cond_local_end, cond_local_prefix, &cond_remote_start, &cond_remote_end, cond_remote_prefix, cond_packet_filter_tags, ultimate_result, ultimate_result_parameter);
if (policy_id == 0) {
NECPLOG0(LOG_DEBUG, "Error applying IP output kernel policy");
}
if (ip_output_layer_id_condition) {
- necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(policy->id, policy->order, NECP_KERNEL_POLICY_SUBORDER_ID_CONDITION, session->session_order, session->proc_pid, NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_ALL_INTERFACES, 0, cond_ip_output_layer_id, NULL, 0, 0, NULL, NULL, 0, NULL, NULL, 0, ultimate_result, ultimate_result_parameter);
+ necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(policy->order, NECP_KERNEL_POLICY_SUBORDER_ID_CONDITION, session->session_order, session->proc_pid, NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_ALL_INTERFACES, 0, cond_ip_output_layer_id, NULL, 0, 0, NULL, NULL, 0, NULL, NULL, 0, 0, ultimate_result, ultimate_result_parameter);
if (policy_id == 0) {
NECPLOG0(LOG_DEBUG, "Error applying IP output kernel policy");
// Extra policies for IP Output tunnels for when packets loop back
if (ip_output_layer_tunnel_condition_from_id) {
- necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(policy->id, policy->order, NECP_KERNEL_POLICY_SUBORDER_NON_ID_TUNNEL_CONDITION, session->session_order, session->proc_pid, NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_LAST_INTERFACE | NECP_KERNEL_CONDITION_ALL_INTERFACES, 0, policy->kernel_ip_output_policies[NECP_KERNEL_POLICY_SUBORDER_NON_ID_CONDITIONS], NULL, cond_last_interface_index, 0, NULL, NULL, 0, NULL, NULL, 0, secondary_result, secondary_result_parameter);
+ necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(policy->order, NECP_KERNEL_POLICY_SUBORDER_NON_ID_TUNNEL_CONDITION, session->session_order, session->proc_pid, NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_LAST_INTERFACE | NECP_KERNEL_CONDITION_ALL_INTERFACES, 0, policy->kernel_ip_output_policies[NECP_KERNEL_POLICY_SUBORDER_NON_ID_CONDITIONS], NULL, cond_last_interface_index, 0, NULL, NULL, 0, NULL, NULL, 0, 0, secondary_result, secondary_result_parameter);
if (policy_id == 0) {
NECPLOG0(LOG_DEBUG, "Error applying IP output kernel policy");
}
if (ip_output_layer_tunnel_condition_from_id) {
- necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(policy->id, policy->order, NECP_KERNEL_POLICY_SUBORDER_ID_TUNNEL_CONDITION, session->session_order, session->proc_pid, NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_LAST_INTERFACE | NECP_KERNEL_CONDITION_ALL_INTERFACES, 0, policy->kernel_ip_output_policies[NECP_KERNEL_POLICY_SUBORDER_ID_CONDITION], NULL, cond_last_interface_index, 0, NULL, NULL, 0, NULL, NULL, 0, secondary_result, secondary_result_parameter);
+ necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(policy->order, NECP_KERNEL_POLICY_SUBORDER_ID_TUNNEL_CONDITION, session->session_order, session->proc_pid, NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_LAST_INTERFACE | NECP_KERNEL_CONDITION_ALL_INTERFACES, 0, policy->kernel_ip_output_policies[NECP_KERNEL_POLICY_SUBORDER_ID_CONDITION], NULL, cond_last_interface_index, 0, NULL, NULL, 0, NULL, NULL, 0, 0, secondary_result, secondary_result_parameter);
if (policy_id == 0) {
NECPLOG0(LOG_DEBUG, "Error applying IP output kernel policy");
policy->applied = TRUE;
policy->pending_update = FALSE;
- return (TRUE);
+ return TRUE;
fail:
- return (FALSE);
+ return FALSE;
}
static void
lck_rw_done(&necp_kernel_policy_lock);
+ necp_update_all_clients();
necp_post_change_event(&kev_data);
if (necp_debug) {
// ---------------------
// Kernel policies are derived from session policies
static necp_kernel_policy_id
-necp_kernel_policy_get_new_id(void)
+necp_kernel_policy_get_new_id(bool socket_level)
{
- necp_kernel_policy_id newid = NECP_KERNEL_POLICY_ID_NONE;
+ static necp_kernel_policy_id necp_last_kernel_socket_policy_id = 0;
+ static necp_kernel_policy_id necp_last_kernel_ip_policy_id = 0;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ necp_kernel_policy_id newid = NECP_KERNEL_POLICY_ID_NONE;
- necp_last_kernel_policy_id++;
- if (necp_last_kernel_policy_id < NECP_KERNEL_POLICY_ID_FIRST_VALID) {
- necp_last_kernel_policy_id = NECP_KERNEL_POLICY_ID_FIRST_VALID;
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+
+ if (socket_level) {
+ bool wrapped = FALSE;
+ do {
+ necp_last_kernel_socket_policy_id++;
+ if (necp_last_kernel_socket_policy_id < NECP_KERNEL_POLICY_ID_FIRST_VALID_SOCKET ||
+ necp_last_kernel_socket_policy_id >= NECP_KERNEL_POLICY_ID_FIRST_VALID_IP) {
+ if (wrapped) {
+ // Already wrapped, give up
+ NECPLOG0(LOG_ERR, "Failed to find a free socket kernel policy ID.\n");
+ return NECP_KERNEL_POLICY_ID_NONE;
+ }
+ necp_last_kernel_socket_policy_id = NECP_KERNEL_POLICY_ID_FIRST_VALID_SOCKET;
+ wrapped = TRUE;
+ }
+ newid = necp_last_kernel_socket_policy_id;
+ } while (necp_kernel_socket_policy_find(newid) != NULL); // If already used, keep trying
+ } else {
+ bool wrapped = FALSE;
+ do {
+ necp_last_kernel_ip_policy_id++;
+ if (necp_last_kernel_ip_policy_id < NECP_KERNEL_POLICY_ID_FIRST_VALID_IP) {
+ if (wrapped) {
+ // Already wrapped, give up
+ NECPLOG0(LOG_ERR, "Failed to find a free IP kernel policy ID.\n");
+ return NECP_KERNEL_POLICY_ID_NONE;
+ }
+ necp_last_kernel_ip_policy_id = NECP_KERNEL_POLICY_ID_FIRST_VALID_IP;
+ wrapped = TRUE;
+ }
+ newid = necp_last_kernel_ip_policy_id;
+ } while (necp_kernel_ip_output_policy_find(newid) != NULL); // If already used, keep trying
}
- newid = necp_last_kernel_policy_id;
if (newid == NECP_KERNEL_POLICY_ID_NONE) {
- NECPLOG0(LOG_DEBUG, "Allocate kernel policy id failed.\n");
- return (0);
+ NECPLOG0(LOG_ERR, "Allocate kernel policy id failed.\n");
+ return NECP_KERNEL_POLICY_ID_NONE;
}
- return (newid);
+ return newid;
}
-#define NECP_KERNEL_VALID_SOCKET_CONDITIONS (NECP_KERNEL_CONDITION_APP_ID | NECP_KERNEL_CONDITION_REAL_APP_ID | NECP_KERNEL_CONDITION_DOMAIN | NECP_KERNEL_CONDITION_ACCOUNT_ID | NECP_KERNEL_CONDITION_PID | NECP_KERNEL_CONDITION_UID | NECP_KERNEL_CONDITION_ALL_INTERFACES | NECP_KERNEL_CONDITION_BOUND_INTERFACE | NECP_KERNEL_CONDITION_TRAFFIC_CLASS | NECP_KERNEL_CONDITION_PROTOCOL | NECP_KERNEL_CONDITION_LOCAL_START | NECP_KERNEL_CONDITION_LOCAL_END | NECP_KERNEL_CONDITION_LOCAL_PREFIX | NECP_KERNEL_CONDITION_REMOTE_START | NECP_KERNEL_CONDITION_REMOTE_END | NECP_KERNEL_CONDITION_REMOTE_PREFIX | NECP_KERNEL_CONDITION_ENTITLEMENT)
+#define NECP_KERNEL_VALID_SOCKET_CONDITIONS (NECP_KERNEL_CONDITION_APP_ID | NECP_KERNEL_CONDITION_REAL_APP_ID | NECP_KERNEL_CONDITION_DOMAIN | NECP_KERNEL_CONDITION_ACCOUNT_ID | NECP_KERNEL_CONDITION_PID | NECP_KERNEL_CONDITION_UID | NECP_KERNEL_CONDITION_ALL_INTERFACES | NECP_KERNEL_CONDITION_BOUND_INTERFACE | NECP_KERNEL_CONDITION_TRAFFIC_CLASS | NECP_KERNEL_CONDITION_PROTOCOL | NECP_KERNEL_CONDITION_LOCAL_START | NECP_KERNEL_CONDITION_LOCAL_END | NECP_KERNEL_CONDITION_LOCAL_PREFIX | NECP_KERNEL_CONDITION_REMOTE_START | NECP_KERNEL_CONDITION_REMOTE_END | NECP_KERNEL_CONDITION_REMOTE_PREFIX | NECP_KERNEL_CONDITION_ENTITLEMENT | NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT | NECP_KERNEL_CONDITION_AGENT_TYPE | NECP_KERNEL_CONDITION_HAS_CLIENT | NECP_KERNEL_CONDITION_LOCAL_NETWORKS | NECP_KERNEL_CONDITION_CLIENT_FLAGS | NECP_KERNEL_CONDITION_LOCAL_EMPTY | NECP_KERNEL_CONDITION_REMOTE_EMPTY | NECP_KERNEL_CONDITION_PLATFORM_BINARY | NECP_KERNEL_CONDITION_SDK_VERSION | NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER | NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS | NECP_KERNEL_CONDITION_IS_LOOPBACK)
+
static necp_kernel_policy_id
-necp_kernel_socket_policy_add(necp_policy_id parent_policy_id, necp_policy_order order, u_int32_t session_order, int session_pid, u_int32_t condition_mask, u_int32_t condition_negated_mask, necp_app_id cond_app_id, necp_app_id cond_real_app_id, u_int32_t cond_account_id, char *cond_domain, pid_t cond_pid, uid_t cond_uid, ifnet_t cond_bound_interface, struct necp_policy_condition_tc_range cond_traffic_class, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter)
+necp_kernel_socket_policy_add(necp_policy_order order, u_int32_t session_order, int session_pid, u_int32_t condition_mask, u_int32_t condition_negated_mask, necp_app_id cond_app_id, necp_app_id cond_real_app_id, char *cond_custom_entitlement, u_int32_t cond_account_id, char *cond_domain, pid_t cond_pid, uid_t cond_uid, ifnet_t cond_bound_interface, struct necp_policy_condition_tc_range cond_traffic_class, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, struct necp_policy_condition_agent_type *cond_agent_type, struct necp_policy_condition_sdk_version *cond_sdk_version, u_int32_t cond_client_flags, char *cond_signing_identifier, u_int16_t cond_packet_filter_tags, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter)
{
struct necp_kernel_socket_policy *new_kernel_policy = NULL;
struct necp_kernel_socket_policy *tmp_kernel_policy = NULL;
- MALLOC_ZONE(new_kernel_policy, struct necp_kernel_socket_policy *, sizeof(*new_kernel_policy), M_NECP_SOCKET_POLICY, M_WAITOK);
- if (new_kernel_policy == NULL) {
- goto done;
- }
+ new_kernel_policy = zalloc_flags(necp_socket_policy_zone, Z_WAITOK | Z_ZERO);
- memset(new_kernel_policy, 0, sizeof(*new_kernel_policy));
- new_kernel_policy->parent_policy_id = parent_policy_id;
- new_kernel_policy->id = necp_kernel_policy_get_new_id();
+ new_kernel_policy->id = necp_kernel_policy_get_new_id(true);
new_kernel_policy->order = order;
new_kernel_policy->session_order = session_order;
new_kernel_policy->session_pid = session_pid;
if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) && !(new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID)) {
new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_REAL_APP_ID;
}
- if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ENTITLEMENT) && !(new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID)) {
- new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_ENTITLEMENT;
+ if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT) && !(new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID)) {
+ new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT;
}
if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) && (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX)) {
new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_LOCAL_PREFIX;
if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) && (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX)) {
new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_REMOTE_PREFIX;
}
+ if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_EMPTY) {
+ new_kernel_policy->condition_mask &= ~(NECP_KERNEL_CONDITION_LOCAL_PREFIX | NECP_KERNEL_CONDITION_LOCAL_END);
+ }
+ if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_EMPTY)) {
+ new_kernel_policy->condition_mask &= ~(NECP_KERNEL_CONDITION_REMOTE_PREFIX | NECP_KERNEL_CONDITION_REMOTE_END);
+ }
new_kernel_policy->condition_negated_mask = condition_negated_mask & new_kernel_policy->condition_mask;
// Set condition values
if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) {
new_kernel_policy->cond_real_app_id = cond_real_app_id;
}
+ if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT) {
+ new_kernel_policy->cond_custom_entitlement = cond_custom_entitlement;
+ new_kernel_policy->cond_custom_entitlement_matched = necp_boolean_state_unknown;
+ }
if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID) {
new_kernel_policy->cond_account_id = cond_account_id;
}
if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) {
new_kernel_policy->cond_remote_prefix = cond_remote_prefix;
}
+ if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE) {
+ memcpy(&new_kernel_policy->cond_agent_type, cond_agent_type, sizeof(*cond_agent_type));
+ }
+ if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SDK_VERSION) {
+ memcpy(&new_kernel_policy->cond_sdk_version, cond_sdk_version, sizeof(*cond_sdk_version));
+ }
+ if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) {
+ new_kernel_policy->cond_client_flags = cond_client_flags;
+ }
+ if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER) {
+ new_kernel_policy->cond_signing_identifier = cond_signing_identifier;
+ }
+ if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) {
+ new_kernel_policy->cond_packet_filter_tags = cond_packet_filter_tags;
+ }
new_kernel_policy->result = result;
memcpy(&new_kernel_policy->result_parameter, &result_parameter, sizeof(result_parameter));
NECPLOG(LOG_DEBUG, "Added kernel policy: socket, id=%d, mask=%x\n", new_kernel_policy->id, new_kernel_policy->condition_mask);
}
LIST_INSERT_SORTED_TWICE_ASCENDING(&necp_kernel_socket_policies, new_kernel_policy, chain, session_order, order, tmp_kernel_policy);
-done:
- return (new_kernel_policy ? new_kernel_policy->id : 0);
+
+ return new_kernel_policy ? new_kernel_policy->id : 0;
}
static struct necp_kernel_socket_policy *
struct necp_kernel_socket_policy *tmp_kernel_policy = NULL;
if (policy_id == 0) {
- return (NULL);
+ return NULL;
}
LIST_FOREACH_SAFE(kernel_policy, &necp_kernel_socket_policies, chain, tmp_kernel_policy) {
if (kernel_policy->id == policy_id) {
- return (kernel_policy);
+ return kernel_policy;
}
}
- return (NULL);
+ return NULL;
}
static bool
{
struct necp_kernel_socket_policy *policy = NULL;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
policy = necp_kernel_socket_policy_find(policy_id);
if (policy) {
ifnet_release(policy->cond_bound_interface);
policy->cond_bound_interface = NULL;
}
-
+
if (policy->cond_domain) {
FREE(policy->cond_domain, M_NECP);
policy->cond_domain = NULL;
}
- FREE_ZONE(policy, sizeof(*policy), M_NECP_SOCKET_POLICY);
- return (TRUE);
+ if (policy->cond_custom_entitlement) {
+ FREE(policy->cond_custom_entitlement, M_NECP);
+ policy->cond_custom_entitlement = NULL;
+ }
+
+ if (policy->cond_signing_identifier) {
+ FREE(policy->cond_signing_identifier, M_NECP);
+ policy->cond_signing_identifier = NULL;
+ }
+
+ zfree(necp_socket_policy_zone, policy);
+ return TRUE;
}
- return (FALSE);
+ return FALSE;
}
-#define MAX_RESULT_STRING_LEN 64
static inline const char *
necp_get_result_description(char *result_string, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter)
{
uuid_string_t uuid_string;
switch (result) {
- case NECP_KERNEL_POLICY_RESULT_NONE: {
- return ("None");
- }
- case NECP_KERNEL_POLICY_RESULT_PASS: {
- return ("Pass");
- }
- case NECP_KERNEL_POLICY_RESULT_SKIP: {
- return ("Skip");
- }
- case NECP_KERNEL_POLICY_RESULT_DROP: {
- return ("Drop");
- }
- case NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT: {
- snprintf(result_string, MAX_RESULT_STRING_LEN, "SocketDivert (%d)", result_parameter.flow_divert_control_unit);
- break;
- }
- case NECP_KERNEL_POLICY_RESULT_SOCKET_FILTER: {
- snprintf(result_string, MAX_RESULT_STRING_LEN, "SocketFilter (%d)", result_parameter.filter_control_unit);
- break;
- }
- case NECP_KERNEL_POLICY_RESULT_IP_TUNNEL: {
- ifnet_t interface = ifindex2ifnet[result_parameter.tunnel_interface_index];
- snprintf(result_string, MAX_RESULT_STRING_LEN, "IPTunnel (%s%d)", ifnet_name(interface), ifnet_unit(interface));
- break;
- }
- case NECP_KERNEL_POLICY_RESULT_IP_FILTER: {
- return ("IPFilter");
- }
- case NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED: {
- ifnet_t interface = ifindex2ifnet[result_parameter.scoped_interface_index];
- snprintf(result_string, MAX_RESULT_STRING_LEN, "SocketScoped (%s%d)", ifnet_name(interface), ifnet_unit(interface));
- break;
- }
- case NECP_KERNEL_POLICY_RESULT_ROUTE_RULES: {
- int index = 0;
- char interface_names[IFXNAMSIZ][MAX_ROUTE_RULE_INTERFACES];
- struct necp_route_rule *route_rule = necp_lookup_route_rule_locked(&necp_route_rules, result_parameter.route_rule_id);
- if (route_rule != NULL) {
- bool default_drop = (route_rule->default_action == NECP_ROUTE_RULE_DENY_INTERFACE);
- for (index = 0; index < MAX_ROUTE_RULE_INTERFACES; index++) {
- if (route_rule->exception_if_indices[index] != 0) {
- ifnet_t interface = ifindex2ifnet[route_rule->exception_if_indices[index]];
- snprintf(interface_names[index], IFXNAMSIZ, "%s%d", ifnet_name(interface), ifnet_unit(interface));
- } else {
- memset(interface_names[index], 0, IFXNAMSIZ);
- }
- }
- if (default_drop) {
- snprintf(result_string, MAX_RESULT_STRING_LEN, "RouteRules (Only %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s)",
- (route_rule->cellular_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Cell " : "",
- (route_rule->wifi_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "WiFi " : "",
- (route_rule->wired_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Wired " : "",
- (route_rule->expensive_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Exp " : "",
- (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[0] : "",
- (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
- (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[1] : "",
- (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
- (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[2] : "",
- (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
- (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[3] : "",
- (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
- (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[4] : "",
- (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
- (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[5] : "",
- (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
- (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[6] : "",
- (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
- (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[7] : "",
- (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
- (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[8] : "",
- (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
- (route_rule->exception_if_actions[9] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[9] : "");
+ case NECP_KERNEL_POLICY_RESULT_NONE: {
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "None");
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_PASS: {
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "Pass (%X)", result_parameter.pass_flags);
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_SKIP: {
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "Skip (%u)", result_parameter.skip_policy_order);
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_DROP: {
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "Drop (%X)", result_parameter.drop_flags);
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT: {
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "SocketDivert (%d)", result_parameter.flow_divert_control_unit);
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_SOCKET_FILTER: {
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "SocketFilter (%d)", result_parameter.filter_control_unit);
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_IP_TUNNEL: {
+ ifnet_t interface = ifindex2ifnet[result_parameter.tunnel_interface_index];
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "IPTunnel (%s%d)", ifnet_name(interface), ifnet_unit(interface));
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_IP_FILTER: {
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "IPFilter");
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED: {
+ ifnet_t interface = ifindex2ifnet[result_parameter.scoped_interface_index];
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "SocketScoped (%s%d)", ifnet_name(interface), ifnet_unit(interface));
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_SCOPED_DIRECT: {
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "ScopedDirect");
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_ALLOW_UNENTITLED: {
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "AllowUnentitled");
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_ROUTE_RULES: {
+ int index = 0;
+ char interface_names[MAX_ROUTE_RULE_INTERFACES][IFXNAMSIZ];
+ struct necp_route_rule *route_rule = necp_lookup_route_rule_locked(&necp_route_rules, result_parameter.route_rule_id);
+ if (route_rule != NULL) {
+ for (index = 0; index < MAX_ROUTE_RULE_INTERFACES; index++) {
+ if (route_rule->exception_if_indices[index] != 0) {
+ ifnet_t interface = ifindex2ifnet[route_rule->exception_if_indices[index]];
+ snprintf(interface_names[index], IFXNAMSIZ, "%s%d", ifnet_name(interface), ifnet_unit(interface));
} else {
- snprintf(result_string, MAX_RESULT_STRING_LEN, "RouteRules (%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s)",
- (route_rule->cellular_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!Cell " : "",
- (route_rule->wifi_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!WiFi " : "",
- (route_rule->wired_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!Wired " : "",
- (route_rule->expensive_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!Exp " : "",
- (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
- (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[0] : "",
- (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
- (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[1] : "",
- (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
- (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[2] : "",
- (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
- (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[3] : "",
- (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
- (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[4] : "",
- (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
- (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[5] : "",
- (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
- (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[6] : "",
- (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
- (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[7] : "",
- (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
- (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[8] : "",
- (route_rule->exception_if_actions[9] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
- (route_rule->exception_if_actions[9] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[9] : "");
+ memset(interface_names[index], 0, IFXNAMSIZ);
}
- } else {
+ }
+ switch (route_rule->default_action) {
+ case NECP_ROUTE_RULE_DENY_INTERFACE:
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "RouteRules (Only %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s)",
+ (route_rule->cellular_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Cell " : "",
+ (route_rule->wifi_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "WiFi " : "",
+ (route_rule->wired_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Wired " : "",
+ (route_rule->expensive_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Exp " : "",
+ (route_rule->constrained_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Constrained " : "",
+ (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[0] : "",
+ (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
+ (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[1] : "",
+ (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
+ (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[2] : "",
+ (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
+ (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[3] : "",
+ (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
+ (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[4] : "",
+ (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
+ (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[5] : "",
+ (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
+ (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[6] : "",
+ (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
+ (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[7] : "",
+ (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
+ (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[8] : "",
+ (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " " : "",
+ (route_rule->exception_if_actions[9] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[9] : "");
+ break;
+ case NECP_ROUTE_RULE_ALLOW_INTERFACE:
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "RouteRules (%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s)",
+ (route_rule->cellular_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!Cell " : "",
+ (route_rule->wifi_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!WiFi " : "",
+ (route_rule->wired_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!Wired " : "",
+ (route_rule->expensive_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!Exp " : "",
+ (route_rule->constrained_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!Constrained " : "",
+ (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
+ (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[0] : "",
+ (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
+ (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[1] : "",
+ (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
+ (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[2] : "",
+ (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
+ (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[3] : "",
+ (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
+ (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[4] : "",
+ (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
+ (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[5] : "",
+ (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
+ (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[6] : "",
+ (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
+ (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[7] : "",
+ (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
+ (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[8] : "",
+ (route_rule->exception_if_actions[9] == NECP_ROUTE_RULE_DENY_INTERFACE) ? "!" : "",
+ (route_rule->exception_if_actions[9] == NECP_ROUTE_RULE_DENY_INTERFACE) ? interface_names[9] : "");
+ break;
+ case NECP_ROUTE_RULE_QOS_MARKING:
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "RouteRules (QoSMarking %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s)",
+ (route_rule->cellular_action == NECP_ROUTE_RULE_QOS_MARKING) ? "Cell " : "",
+ (route_rule->wifi_action == NECP_ROUTE_RULE_QOS_MARKING) ? "WiFi " : "",
+ (route_rule->wired_action == NECP_ROUTE_RULE_QOS_MARKING) ? "Wired " : "",
+ (route_rule->expensive_action == NECP_ROUTE_RULE_QOS_MARKING) ? "Exp " : "",
+ (route_rule->constrained_action == NECP_ROUTE_RULE_QOS_MARKING) ? "Constrained " : "",
+ (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[0] : "",
+ (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_QOS_MARKING) ? " " : "",
+ (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[1] : "",
+ (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_QOS_MARKING) ? " " : "",
+ (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[2] : "",
+ (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_QOS_MARKING) ? " " : "",
+ (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[3] : "",
+ (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_QOS_MARKING) ? " " : "",
+ (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[4] : "",
+ (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_QOS_MARKING) ? " " : "",
+ (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[5] : "",
+ (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_QOS_MARKING) ? " " : "",
+ (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[6] : "",
+ (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_QOS_MARKING) ? " " : "",
+ (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[7] : "",
+ (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_QOS_MARKING) ? " " : "",
+ (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[8] : "",
+ (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_QOS_MARKING) ? " " : "",
+ (route_rule->exception_if_actions[9] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[9] : "");
+ break;
+ default:
snprintf(result_string, MAX_RESULT_STRING_LEN, "RouteRules (Unknown)");
+ break;
}
- break;
}
- case NECP_KERNEL_POLICY_RESULT_USE_NETAGENT: {
- bool found_mapping = FALSE;
- struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(result_parameter.netagent_id);
- if (mapping != NULL) {
- uuid_unparse(mapping->uuid, uuid_string);
- found_mapping = TRUE;
- }
- snprintf(result_string, MAX_RESULT_STRING_LEN, "UseNetAgent (%s)", found_mapping ? uuid_string : "Unknown");
- break;
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_USE_NETAGENT: {
+ bool found_mapping = FALSE;
+ struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(result_parameter.netagent_id);
+ if (mapping != NULL) {
+ uuid_unparse(mapping->uuid, uuid_string);
+ found_mapping = TRUE;
}
- case NECP_POLICY_RESULT_TRIGGER: {
- bool found_mapping = FALSE;
- struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(result_parameter.service.identifier);
- if (mapping != NULL) {
- uuid_unparse(mapping->uuid, uuid_string);
- found_mapping = TRUE;
- }
- snprintf(result_string, MAX_RESULT_STRING_LEN, "Trigger (%s.%d)", found_mapping ? uuid_string : "Unknown", result_parameter.service.data);
- break;
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "UseNetAgent (%s)", found_mapping ? uuid_string : "Unknown");
+ break;
+ }
+ case NECP_KERNEL_POLICY_RESULT_NETAGENT_SCOPED: {
+ bool found_mapping = FALSE;
+ struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(result_parameter.netagent_id);
+ if (mapping != NULL) {
+ uuid_unparse(mapping->uuid, uuid_string);
+ found_mapping = TRUE;
}
- case NECP_POLICY_RESULT_TRIGGER_IF_NEEDED: {
- bool found_mapping = FALSE;
- struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(result_parameter.service.identifier);
- if (mapping != NULL) {
- uuid_unparse(mapping->uuid, uuid_string);
- found_mapping = TRUE;
- }
- snprintf(result_string, MAX_RESULT_STRING_LEN, "TriggerIfNeeded (%s.%d)", found_mapping ? uuid_string : "Unknown", result_parameter.service.data);
- break;
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "NetAgentScoped (%s)", found_mapping ? uuid_string : "Unknown");
+ break;
+ }
+ case NECP_POLICY_RESULT_TRIGGER: {
+ bool found_mapping = FALSE;
+ struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(result_parameter.service.identifier);
+ if (mapping != NULL) {
+ uuid_unparse(mapping->uuid, uuid_string);
+ found_mapping = TRUE;
}
- case NECP_POLICY_RESULT_TRIGGER_SCOPED: {
- bool found_mapping = FALSE;
- struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(result_parameter.service.identifier);
- if (mapping != NULL) {
- uuid_unparse(mapping->uuid, uuid_string);
- found_mapping = TRUE;
- }
- snprintf(result_string, MAX_RESULT_STRING_LEN, "TriggerScoped (%s.%d)", found_mapping ? uuid_string : "Unknown", result_parameter.service.data);
- break;
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "Trigger (%s.%d)", found_mapping ? uuid_string : "Unknown", result_parameter.service.data);
+ break;
+ }
+ case NECP_POLICY_RESULT_TRIGGER_IF_NEEDED: {
+ bool found_mapping = FALSE;
+ struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(result_parameter.service.identifier);
+ if (mapping != NULL) {
+ uuid_unparse(mapping->uuid, uuid_string);
+ found_mapping = TRUE;
}
- case NECP_POLICY_RESULT_NO_TRIGGER_SCOPED: {
- bool found_mapping = FALSE;
- struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(result_parameter.service.identifier);
- if (mapping != NULL) {
- uuid_unparse(mapping->uuid, uuid_string);
- found_mapping = TRUE;
- }
- snprintf(result_string, MAX_RESULT_STRING_LEN, "NoTriggerScoped (%s.%d)", found_mapping ? uuid_string : "Unknown", result_parameter.service.data);
- break;
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "TriggerIfNeeded (%s.%d)", found_mapping ? uuid_string : "Unknown", result_parameter.service.data);
+ break;
+ }
+ case NECP_POLICY_RESULT_TRIGGER_SCOPED: {
+ bool found_mapping = FALSE;
+ struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(result_parameter.service.identifier);
+ if (mapping != NULL) {
+ uuid_unparse(mapping->uuid, uuid_string);
+ found_mapping = TRUE;
}
- default: {
- snprintf(result_string, MAX_RESULT_STRING_LEN, "Unknown %d (%d)", result, result_parameter.tunnel_interface_index);
- break;
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "TriggerScoped (%s.%d)", found_mapping ? uuid_string : "Unknown", result_parameter.service.data);
+ break;
+ }
+ case NECP_POLICY_RESULT_NO_TRIGGER_SCOPED: {
+ bool found_mapping = FALSE;
+ struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(result_parameter.service.identifier);
+ if (mapping != NULL) {
+ uuid_unparse(mapping->uuid, uuid_string);
+ found_mapping = TRUE;
}
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "NoTriggerScoped (%s.%d)", found_mapping ? uuid_string : "Unknown", result_parameter.service.data);
+ break;
+ }
+ default: {
+ snprintf(result_string, MAX_RESULT_STRING_LEN, "Unknown %d (%d)", result, result_parameter.tunnel_interface_index);
+ break;
}
- return (result_string);
+ }
+ return result_string;
}
static void
static inline bool
necp_kernel_socket_result_is_trigger_service_type(struct necp_kernel_socket_policy *kernel_policy)
{
- return (kernel_policy->result >= NECP_KERNEL_POLICY_RESULT_TRIGGER && kernel_policy->result <= NECP_KERNEL_POLICY_RESULT_NO_TRIGGER_SCOPED);
+ return kernel_policy->result >= NECP_KERNEL_POLICY_RESULT_TRIGGER && kernel_policy->result <= NECP_KERNEL_POLICY_RESULT_NO_TRIGGER_SCOPED;
}
static inline bool
{
if (upper_policy->result == NECP_KERNEL_POLICY_RESULT_DROP) {
// Drop always cancels out lower policies
- return (TRUE);
+ return TRUE;
} else if (upper_policy->result == NECP_KERNEL_POLICY_RESULT_SOCKET_FILTER ||
- upper_policy->result == NECP_KERNEL_POLICY_RESULT_ROUTE_RULES ||
- upper_policy->result == NECP_KERNEL_POLICY_RESULT_USE_NETAGENT) {
+ upper_policy->result == NECP_KERNEL_POLICY_RESULT_ROUTE_RULES ||
+ upper_policy->result == NECP_KERNEL_POLICY_RESULT_USE_NETAGENT ||
+ upper_policy->result == NECP_KERNEL_POLICY_RESULT_NETAGENT_SCOPED ||
+ upper_policy->result == NECP_KERNEL_POLICY_RESULT_ALLOW_UNENTITLED) {
// Filters and route rules never cancel out lower policies
- return (FALSE);
+ return FALSE;
} else if (necp_kernel_socket_result_is_trigger_service_type(upper_policy)) {
// Trigger/Scoping policies can overlap one another, but not other results
- return (necp_kernel_socket_result_is_trigger_service_type(lower_policy));
+ return necp_kernel_socket_result_is_trigger_service_type(lower_policy);
} else if (upper_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) {
if (upper_policy->session_order != lower_policy->session_order) {
// A skip cannot override a policy of a different session
- return (FALSE);
+ return FALSE;
} else {
if (upper_policy->result_parameter.skip_policy_order == 0 ||
- lower_policy->order >= upper_policy->result_parameter.skip_policy_order) {
+ lower_policy->order >= upper_policy->result_parameter.skip_policy_order) {
// This policy is beyond the skip
- return (FALSE);
+ return FALSE;
} else {
// This policy is inside the skip
- return (TRUE);
+ return TRUE;
}
}
}
// A hard pass, flow divert, tunnel, or scope will currently block out lower policies
- return (TRUE);
+ return TRUE;
}
static bool
// For policies in a skip window, we can't mark conflicting policies as unnecessary
if (can_skip) {
if (highest_skip_session_order != compared_policy->session_order ||
- (highest_skip_order != 0 && compared_policy->order >= highest_skip_order)) {
+ (highest_skip_order != 0 && compared_policy->order >= highest_skip_order)) {
// If we've moved on to the next session, or passed the skip window
highest_skip_session_order = 0;
highest_skip_order = 0;
continue;
}
+ // If new policy matches Local Networks, compared policy must also
+ if ((policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) && !(compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS)) {
+ continue;
+ }
+
// Default makes lower policies unecessary always
if (compared_policy->condition_mask == 0) {
- return (TRUE);
+ return TRUE;
}
// Compared must be more general than policy, and include only conditions within policy
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_DOMAIN &&
- strcmp(compared_policy->cond_domain, policy->cond_domain) != 0) {
+ strcmp(compared_policy->cond_domain, policy->cond_domain) != 0) {
+ continue;
+ }
+
+ if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT &&
+ strcmp(compared_policy->cond_custom_entitlement, policy->cond_custom_entitlement) != 0) {
continue;
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID &&
- compared_policy->cond_account_id != policy->cond_account_id) {
+ compared_policy->cond_account_id != policy->cond_account_id) {
continue;
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID &&
- compared_policy->cond_policy_id != policy->cond_policy_id) {
+ compared_policy->cond_policy_id != policy->cond_policy_id) {
continue;
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID &&
- compared_policy->cond_app_id != policy->cond_app_id) {
+ compared_policy->cond_app_id != policy->cond_app_id) {
continue;
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID &&
- compared_policy->cond_real_app_id != policy->cond_real_app_id) {
+ compared_policy->cond_real_app_id != policy->cond_real_app_id) {
continue;
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_PID &&
- compared_policy->cond_pid != policy->cond_pid) {
+ compared_policy->cond_pid != policy->cond_pid) {
continue;
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_UID &&
- compared_policy->cond_uid != policy->cond_uid) {
+ compared_policy->cond_uid != policy->cond_uid) {
continue;
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE &&
- compared_policy->cond_bound_interface != policy->cond_bound_interface) {
+ compared_policy->cond_bound_interface != policy->cond_bound_interface) {
continue;
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_PROTOCOL &&
- compared_policy->cond_protocol != policy->cond_protocol) {
+ compared_policy->cond_protocol != policy->cond_protocol) {
+ continue;
+ }
+
+ if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS &&
+ compared_policy->cond_client_flags != policy->cond_client_flags) {
continue;
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS &&
- !(compared_policy->cond_traffic_class.start_tc <= policy->cond_traffic_class.start_tc &&
- compared_policy->cond_traffic_class.end_tc >= policy->cond_traffic_class.end_tc)) {
+ !(compared_policy->cond_traffic_class.start_tc <= policy->cond_traffic_class.start_tc &&
+ compared_policy->cond_traffic_class.end_tc >= policy->cond_traffic_class.end_tc)) {
continue;
}
}
} else if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) {
if (compared_policy->cond_local_prefix > policy->cond_local_prefix ||
- !necp_is_addr_in_subnet((struct sockaddr *)&policy->cond_local_start, (struct sockaddr *)&compared_policy->cond_local_start, compared_policy->cond_local_prefix)) {
+ !necp_is_addr_in_subnet((struct sockaddr *)&policy->cond_local_start, (struct sockaddr *)&compared_policy->cond_local_start, compared_policy->cond_local_prefix)) {
continue;
}
}
}
} else if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) {
if (compared_policy->cond_remote_prefix > policy->cond_remote_prefix ||
- !necp_is_addr_in_subnet((struct sockaddr *)&policy->cond_remote_start, (struct sockaddr *)&compared_policy->cond_remote_start, compared_policy->cond_remote_prefix)) {
+ !necp_is_addr_in_subnet((struct sockaddr *)&policy->cond_remote_start, (struct sockaddr *)&compared_policy->cond_remote_start, compared_policy->cond_remote_prefix)) {
continue;
}
}
}
- return (TRUE);
+ if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE &&
+ memcmp(&compared_policy->cond_agent_type, &policy->cond_agent_type, sizeof(policy->cond_agent_type)) == 0) {
+ continue;
+ }
+
+ if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_SDK_VERSION &&
+ memcmp(&compared_policy->cond_sdk_version, &policy->cond_sdk_version, sizeof(policy->cond_sdk_version)) == 0) {
+ continue;
+ }
+
+ if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS &&
+ memcmp(&compared_policy->cond_packet_filter_tags, &policy->cond_packet_filter_tags, sizeof(policy->cond_packet_filter_tags)) == 0) {
+ continue;
+ }
+
+ return TRUE;
}
- return (FALSE);
+ return FALSE;
}
static bool
int app_layer_current_free_index = 0;
struct necp_kernel_socket_policy *kernel_policy = NULL;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
// Reset mask to 0
necp_kernel_application_policies_condition_mask = 0;
necp_kernel_application_policies_count++;
app_layer_allocation_count++;
+ if ((kernel_policy->condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE)) {
+ // Agent type conditions only apply to app layer
+ continue;
+ }
+
// Update socket layer bucket mask/counts
necp_kernel_socket_policies_condition_mask |= kernel_policy->condition_mask;
necp_kernel_socket_policies_count++;
if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID) ||
- kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_APP_ID) {
+ kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_APP_ID) {
necp_kernel_socket_policies_non_app_count++;
for (app_i = 0; app_i < NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS; app_i++) {
bucket_allocation_counts[app_i]++;
// Fill out maps
LIST_FOREACH(kernel_policy, &necp_kernel_socket_policies, chain) {
- // Insert pointers into map
+ // Add app layer policies
+ if (!necp_dedup_policies || !necp_kernel_socket_policy_is_unnecessary(kernel_policy, necp_kernel_socket_policies_app_layer_map, app_layer_current_free_index)) {
+ necp_kernel_socket_policies_app_layer_map[app_layer_current_free_index] = kernel_policy;
+ app_layer_current_free_index++;
+ necp_kernel_socket_policies_app_layer_map[app_layer_current_free_index] = NULL;
+ }
+
+ if ((kernel_policy->condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE)) {
+ // Agent type conditions only apply to app layer
+ continue;
+ }
+
+ // Add socket policies
if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID) ||
- kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_APP_ID) {
+ kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_APP_ID) {
for (app_i = 0; app_i < NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS; app_i++) {
- if (!necp_kernel_socket_policy_is_unnecessary(kernel_policy, necp_kernel_socket_policies_map[app_i], bucket_current_free_index[app_i])) {
+ if (!necp_dedup_policies || !necp_kernel_socket_policy_is_unnecessary(kernel_policy, necp_kernel_socket_policies_map[app_i], bucket_current_free_index[app_i])) {
(necp_kernel_socket_policies_map[app_i])[(bucket_current_free_index[app_i])] = kernel_policy;
bucket_current_free_index[app_i]++;
(necp_kernel_socket_policies_map[app_i])[(bucket_current_free_index[app_i])] = NULL;
}
} else {
app_i = NECP_SOCKET_MAP_APP_ID_TO_BUCKET(kernel_policy->cond_app_id);
- if (!necp_kernel_socket_policy_is_unnecessary(kernel_policy, necp_kernel_socket_policies_map[app_i], bucket_current_free_index[app_i])) {
+ if (!necp_dedup_policies || !necp_kernel_socket_policy_is_unnecessary(kernel_policy, necp_kernel_socket_policies_map[app_i], bucket_current_free_index[app_i])) {
(necp_kernel_socket_policies_map[app_i])[(bucket_current_free_index[app_i])] = kernel_policy;
bucket_current_free_index[app_i]++;
(necp_kernel_socket_policies_map[app_i])[(bucket_current_free_index[app_i])] = NULL;
}
}
-
- if (!necp_kernel_socket_policy_is_unnecessary(kernel_policy, necp_kernel_socket_policies_app_layer_map, app_layer_current_free_index)) {
- necp_kernel_socket_policies_app_layer_map[app_layer_current_free_index] = kernel_policy;
- app_layer_current_free_index++;
- necp_kernel_socket_policies_app_layer_map[app_layer_current_free_index] = NULL;
- }
}
necp_kernel_socket_policies_dump_all();
BUMP_KERNEL_SOCKET_POLICIES_GENERATION_COUNT();
- return (TRUE);
+ return TRUE;
fail:
// Free memory, reset masks to 0
FREE(necp_kernel_socket_policies_app_layer_map, M_NECP);
necp_kernel_socket_policies_app_layer_map = NULL;
}
- return (FALSE);
+ return FALSE;
}
static u_int32_t
necp_get_new_string_id(void)
{
+ static u_int32_t necp_last_string_id = 0;
+
u_int32_t newid = 0;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
- necp_last_string_id++;
- if (necp_last_string_id < 1) {
- necp_last_string_id = 1;
- }
+ bool wrapped = FALSE;
+ do {
+ necp_last_string_id++;
+ if (necp_last_string_id < 1) {
+ if (wrapped) {
+ // Already wrapped, give up
+ NECPLOG0(LOG_ERR, "Failed to find a free app UUID.\n");
+ return 0;
+ }
+ necp_last_string_id = 1;
+ wrapped = TRUE;
+ }
+ newid = necp_last_string_id;
+ } while (necp_lookup_string_with_id_locked(&necp_account_id_list, newid) != NULL); // If already used, keep trying
- newid = necp_last_string_id;
if (newid == 0) {
- NECPLOG0(LOG_DEBUG, "Allocate string id failed.\n");
- return (0);
+ NECPLOG0(LOG_ERR, "Allocate string id failed.\n");
+ return 0;
}
- return (newid);
+ return newid;
}
static struct necp_string_id_mapping *
}
}
- return (foundentry);
+ return foundentry;
+}
+
+static struct necp_string_id_mapping *
+necp_lookup_string_with_id_locked(struct necp_string_id_mapping_list *list, u_int32_t local_id)
+{
+ struct necp_string_id_mapping *searchentry = NULL;
+ struct necp_string_id_mapping *foundentry = NULL;
+
+ LIST_FOREACH(searchentry, list, chain) {
+ if (searchentry->id == local_id) {
+ foundentry = searchentry;
+ break;
+ }
+ }
+
+ return foundentry;
}
static u_int32_t
u_int32_t string_id = 0;
struct necp_string_id_mapping *existing_mapping = NULL;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
existing_mapping = necp_lookup_string_to_id_locked(list, string);
if (existing_mapping != NULL) {
string_id = existing_mapping->id;
- existing_mapping->refcount++;
+ os_ref_retain_locked(&existing_mapping->refcount);
} else {
struct necp_string_id_mapping *new_mapping = NULL;
MALLOC(new_mapping, struct necp_string_id_mapping *, sizeof(struct necp_string_id_mapping), M_NECP, M_WAITOK);
if (new_mapping->string != NULL) {
memcpy(new_mapping->string, string, length);
new_mapping->id = necp_get_new_string_id();
- new_mapping->refcount = 1;
+ os_ref_init(&new_mapping->refcount, &necp_refgrp);
LIST_INSERT_HEAD(list, new_mapping, chain);
string_id = new_mapping->id;
} else {
}
}
}
- return (string_id);
+ return string_id;
}
static bool
{
struct necp_string_id_mapping *existing_mapping = NULL;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
existing_mapping = necp_lookup_string_to_id_locked(list, string);
if (existing_mapping != NULL) {
- if (--existing_mapping->refcount == 0) {
+ if (os_ref_release_locked(&existing_mapping->refcount) == 0) {
LIST_REMOVE(existing_mapping, chain);
FREE(existing_mapping->string, M_NECP);
FREE(existing_mapping, M_NECP);
}
- return (TRUE);
+ return TRUE;
}
- return (FALSE);
+ return FALSE;
}
+#define NECP_FIRST_VALID_ROUTE_RULE_ID 1
+#define NECP_FIRST_VALID_AGGREGATE_ROUTE_RULE_ID UINT16_MAX
static u_int32_t
-necp_get_new_route_rule_id(void)
+necp_get_new_route_rule_id(bool aggregate)
{
- u_int32_t newid = 0;
+ static u_int32_t necp_last_route_rule_id = 0;
+ static u_int32_t necp_last_aggregate_route_rule_id = 0;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
-
- necp_last_route_rule_id++;
- if (necp_last_route_rule_id < 1 || necp_last_route_rule_id > UINT16_MAX) {
- necp_last_route_rule_id = 1;
- }
-
- newid = necp_last_route_rule_id;
- if (newid == 0) {
- NECPLOG0(LOG_DEBUG, "Allocate route rule id failed.\n");
- return (0);
- }
-
- return (newid);
-}
-
-static u_int32_t
-necp_get_new_aggregate_route_rule_id(void)
-{
u_int32_t newid = 0;
- lck_rw_assert(&necp_route_rule_lock, LCK_RW_ASSERT_EXCLUSIVE);
-
- necp_last_aggregate_route_rule_id++;
- if (necp_last_aggregate_route_rule_id <= UINT16_MAX) {
- necp_last_aggregate_route_rule_id = UINT16_MAX + 1;
+ if (!aggregate) {
+ // Main necp_kernel_policy_lock protects non-aggregate rule IDs
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+
+ bool wrapped = FALSE;
+ do {
+ necp_last_route_rule_id++;
+ if (necp_last_route_rule_id < NECP_FIRST_VALID_ROUTE_RULE_ID ||
+ necp_last_route_rule_id >= NECP_FIRST_VALID_AGGREGATE_ROUTE_RULE_ID) {
+ if (wrapped) {
+ // Already wrapped, give up
+ NECPLOG0(LOG_ERR, "Failed to find a free route rule id.\n");
+ return 0;
+ }
+ necp_last_route_rule_id = NECP_FIRST_VALID_ROUTE_RULE_ID;
+ wrapped = TRUE;
+ }
+ newid = necp_last_route_rule_id;
+ } while (necp_lookup_route_rule_locked(&necp_route_rules, newid) != NULL); // If already used, keep trying
+ } else {
+ // necp_route_rule_lock protects aggregate rule IDs
+ LCK_RW_ASSERT(&necp_route_rule_lock, LCK_RW_ASSERT_EXCLUSIVE);
+
+ bool wrapped = FALSE;
+ do {
+ necp_last_aggregate_route_rule_id++;
+ if (necp_last_aggregate_route_rule_id < NECP_FIRST_VALID_AGGREGATE_ROUTE_RULE_ID) {
+ if (wrapped) {
+ // Already wrapped, give up
+ NECPLOG0(LOG_ERR, "Failed to find a free aggregate route rule id.\n");
+ return 0;
+ }
+ necp_last_aggregate_route_rule_id = NECP_FIRST_VALID_AGGREGATE_ROUTE_RULE_ID;
+ wrapped = TRUE;
+ }
+ newid = necp_last_aggregate_route_rule_id;
+ } while (necp_lookup_route_rule_locked(&necp_route_rules, newid) != NULL); // If already used, keep trying
}
- newid = necp_last_aggregate_route_rule_id;
if (newid == 0) {
- NECPLOG0(LOG_DEBUG, "Allocate aggregate route rule id failed.\n");
- return (0);
+ NECPLOG0(LOG_ERR, "Allocate route rule ID failed.\n");
+ return 0;
}
- return (newid);
+ return newid;
}
static struct necp_route_rule *
}
}
- return (foundentry);
+ return foundentry;
}
static struct necp_route_rule *
-necp_lookup_route_rule_by_contents_locked(struct necp_route_rule_list *list, u_int32_t default_action, u_int8_t cellular_action, u_int8_t wifi_action, u_int8_t wired_action, u_int8_t expensive_action, u_int32_t *if_indices, u_int8_t *if_actions)
+necp_lookup_route_rule_by_contents_locked(struct necp_route_rule_list *list, u_int32_t default_action, u_int8_t cellular_action, u_int8_t wifi_action, u_int8_t wired_action, u_int8_t expensive_action, u_int8_t constrained_action, u_int32_t *if_indices, u_int8_t *if_actions)
{
struct necp_route_rule *searchentry = NULL;
struct necp_route_rule *foundentry = NULL;
LIST_FOREACH(searchentry, list, chain) {
if (searchentry->default_action == default_action &&
- searchentry->cellular_action == cellular_action &&
- searchentry->wifi_action == wifi_action &&
- searchentry->wired_action == wired_action &&
- searchentry->expensive_action == expensive_action) {
+ searchentry->cellular_action == cellular_action &&
+ searchentry->wifi_action == wifi_action &&
+ searchentry->wired_action == wired_action &&
+ searchentry->expensive_action == expensive_action &&
+ searchentry->constrained_action == constrained_action) {
bool match_failed = FALSE;
size_t index_a = 0;
size_t index_b = 0;
count_b = index_b + 1;
}
if (searchentry->exception_if_indices[index_a] == if_indices[index_b] &&
- searchentry->exception_if_actions[index_a] == if_actions[index_b]) {
+ searchentry->exception_if_actions[index_a] == if_actions[index_b]) {
found_index = TRUE;
break;
}
}
}
- return (foundentry);
+ return foundentry;
}
static u_int32_t
u_int8_t wifi_action = NECP_ROUTE_RULE_NONE;
u_int8_t wired_action = NECP_ROUTE_RULE_NONE;
u_int8_t expensive_action = NECP_ROUTE_RULE_NONE;
+ u_int8_t constrained_action = NECP_ROUTE_RULE_NONE;
u_int32_t if_indices[MAX_ROUTE_RULE_INTERFACES];
size_t num_valid_indices = 0;
memset(&if_indices, 0, sizeof(if_indices));
u_int8_t if_actions[MAX_ROUTE_RULE_INTERFACES];
memset(&if_actions, 0, sizeof(if_actions));
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
if (route_rules_array == NULL || route_rules_array_size == 0) {
- return (0);
+ return 0;
}
// Process rules
if (rule_flags & NECP_ROUTE_RULE_FLAG_EXPENSIVE) {
expensive_action = rule_type;
}
+ if (rule_flags & NECP_ROUTE_RULE_FLAG_CONSTRAINED) {
+ constrained_action = rule_type;
+ }
if (rule_flags == 0) {
default_action = rule_type;
}
continue;
}
- memcpy(interface_name, rule_value, rule_length);
- interface_name[length - 1] = 0; // Make sure the string is NULL terminated
- if (ifnet_find_by_name(interface_name, &rule_interface) == 0) {
- if_actions[num_valid_indices] = rule_type;
- if_indices[num_valid_indices++] = rule_interface->if_index;
+ if (rule_length <= IFXNAMSIZ) {
+ memcpy(interface_name, rule_value, rule_length);
+ interface_name[rule_length - 1] = 0; // Make sure the string is NULL terminated
+ if (ifnet_find_by_name(interface_name, &rule_interface) == 0) {
+ if_actions[num_valid_indices] = rule_type;
+ if_indices[num_valid_indices++] = rule_interface->if_index;
+ ifnet_release(rule_interface);
+ }
}
-
offset += sizeof(u_int8_t) + sizeof(u_int32_t) + length;
}
- existing_rule = necp_lookup_route_rule_by_contents_locked(list, default_action, cellular_action, wifi_action, wired_action, expensive_action, if_indices, if_actions);
+ existing_rule = necp_lookup_route_rule_by_contents_locked(list, default_action, cellular_action, wifi_action, wired_action, expensive_action, constrained_action, if_indices, if_actions);
if (existing_rule != NULL) {
route_rule_id = existing_rule->id;
- existing_rule->refcount++;
+ os_ref_retain_locked(&existing_rule->refcount);
} else {
struct necp_route_rule *new_rule = NULL;
MALLOC(new_rule, struct necp_route_rule *, sizeof(struct necp_route_rule), M_NECP, M_WAITOK);
if (new_rule != NULL) {
memset(new_rule, 0, sizeof(struct necp_route_rule));
- route_rule_id = new_rule->id = necp_get_new_route_rule_id();
+ route_rule_id = new_rule->id = necp_get_new_route_rule_id(false);
new_rule->default_action = default_action;
new_rule->cellular_action = cellular_action;
new_rule->wifi_action = wifi_action;
new_rule->wired_action = wired_action;
new_rule->expensive_action = expensive_action;
+ new_rule->constrained_action = constrained_action;
memcpy(&new_rule->exception_if_indices, &if_indices, sizeof(if_indices));
memcpy(&new_rule->exception_if_actions, &if_actions, sizeof(if_actions));
- new_rule->refcount = 1;
+ os_ref_init(&new_rule->refcount, &necp_refgrp);
LIST_INSERT_HEAD(list, new_rule, chain);
}
}
- return (route_rule_id);
+ return route_rule_id;
}
static void
{
struct necp_route_rule *existing_rule = NULL;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
existing_rule = necp_lookup_route_rule_locked(list, route_rule_id);
if (existing_rule != NULL) {
- if (--existing_rule->refcount == 0) {
+ if (os_ref_release_locked(&existing_rule->refcount) == 0) {
necp_remove_aggregate_route_rule_for_id(existing_rule->id);
LIST_REMOVE(existing_rule, chain);
FREE(existing_rule, M_NECP);
}
- return (TRUE);
+ return TRUE;
}
- return (FALSE);
+ return FALSE;
}
static struct necp_aggregate_route_rule *
lck_rw_done(&necp_route_rule_lock);
- return (foundentry);
+ return foundentry;
}
static u_int32_t
struct necp_aggregate_route_rule *new_rule = NULL;
struct necp_aggregate_route_rule *existing_rule = NULL;
- LIST_FOREACH(existing_rule, &necp_aggregate_route_rules, chain) {
- if (memcmp(existing_rule->rule_ids, rule_ids, (sizeof(u_int32_t) * MAX_AGGREGATE_ROUTE_RULES)) == 0) {
- return (existing_rule->id);
- }
- }
-
lck_rw_lock_exclusive(&necp_route_rule_lock);
+ // Check if the rule already exists
LIST_FOREACH(existing_rule, &necp_aggregate_route_rules, chain) {
- // Re-check, in case something else created the rule while we are waiting to lock
if (memcmp(existing_rule->rule_ids, rule_ids, (sizeof(u_int32_t) * MAX_AGGREGATE_ROUTE_RULES)) == 0) {
lck_rw_done(&necp_route_rule_lock);
- return (existing_rule->id);
+ return existing_rule->id;
}
}
MALLOC(new_rule, struct necp_aggregate_route_rule *, sizeof(struct necp_aggregate_route_rule), M_NECP, M_WAITOK);
if (new_rule != NULL) {
memset(new_rule, 0, sizeof(struct necp_aggregate_route_rule));
- aggregate_route_rule_id = new_rule->id = necp_get_new_aggregate_route_rule_id();
+ aggregate_route_rule_id = new_rule->id = necp_get_new_route_rule_id(true);
new_rule->id = aggregate_route_rule_id;
memcpy(new_rule->rule_ids, rule_ids, (sizeof(u_int32_t) * MAX_AGGREGATE_ROUTE_RULES));
LIST_INSERT_HEAD(&necp_aggregate_route_rules, new_rule, chain);
}
lck_rw_done(&necp_route_rule_lock);
- return (aggregate_route_rule_id);
+ return aggregate_route_rule_id;
}
#define NECP_NULL_SERVICE_ID 1
+#define NECP_FIRST_VALID_SERVICE_ID 2
+#define NECP_FIRST_VALID_APP_ID UINT16_MAX
static u_int32_t
-necp_get_new_uuid_id(void)
+necp_get_new_uuid_id(bool service)
{
- u_int32_t newid = 0;
+ static u_int32_t necp_last_service_uuid_id = 0;
+ static u_int32_t necp_last_app_uuid_id = 0;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ u_int32_t newid = 0;
- necp_last_uuid_id++;
- if (necp_last_uuid_id < (NECP_NULL_SERVICE_ID + 1)) {
- necp_last_uuid_id = (NECP_NULL_SERVICE_ID + 1);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+
+ if (service) {
+ bool wrapped = FALSE;
+ do {
+ necp_last_service_uuid_id++;
+ if (necp_last_service_uuid_id < NECP_FIRST_VALID_SERVICE_ID ||
+ necp_last_service_uuid_id >= NECP_FIRST_VALID_APP_ID) {
+ if (wrapped) {
+ // Already wrapped, give up
+ NECPLOG0(LOG_ERR, "Failed to find a free service UUID.\n");
+ return NECP_NULL_SERVICE_ID;
+ }
+ necp_last_service_uuid_id = NECP_FIRST_VALID_SERVICE_ID;
+ wrapped = TRUE;
+ }
+ newid = necp_last_service_uuid_id;
+ } while (necp_uuid_lookup_uuid_with_service_id_locked(newid) != NULL); // If already used, keep trying
+ } else {
+ bool wrapped = FALSE;
+ do {
+ necp_last_app_uuid_id++;
+ if (necp_last_app_uuid_id < NECP_FIRST_VALID_APP_ID) {
+ if (wrapped) {
+ // Already wrapped, give up
+ NECPLOG0(LOG_ERR, "Failed to find a free app UUID.\n");
+ return NECP_NULL_SERVICE_ID;
+ }
+ necp_last_app_uuid_id = NECP_FIRST_VALID_APP_ID;
+ wrapped = TRUE;
+ }
+ newid = necp_last_app_uuid_id;
+ } while (necp_uuid_lookup_uuid_with_app_id_locked(newid) != NULL); // If already used, keep trying
}
- newid = necp_last_uuid_id;
- if (newid == 0) {
- NECPLOG0(LOG_DEBUG, "Allocate uuid id failed.\n");
- return (0);
+ if (newid == NECP_NULL_SERVICE_ID) {
+ NECPLOG0(LOG_ERR, "Allocate uuid ID failed.\n");
+ return NECP_NULL_SERVICE_ID;
}
- return (newid);
+ return newid;
}
static struct necp_uuid_id_mapping *
}
}
- return (foundentry);
+ return foundentry;
+}
+
+static struct necp_uuid_id_mapping *
+necp_uuid_lookup_uuid_with_app_id_locked(u_int32_t local_id)
+{
+ struct necp_uuid_id_mapping *searchentry = NULL;
+ struct necp_uuid_id_mapping *foundentry = NULL;
+
+ struct necp_uuid_id_mapping_head *uuid_list_head = NULL;
+ for (uuid_list_head = &necp_uuid_app_id_hashtbl[necp_uuid_app_id_hash_num_buckets - 1]; uuid_list_head >= necp_uuid_app_id_hashtbl; uuid_list_head--) {
+ LIST_FOREACH(searchentry, uuid_list_head, chain) {
+ if (searchentry->id == local_id) {
+ foundentry = searchentry;
+ break;
+ }
+ }
+ }
+
+ return foundentry;
}
static u_int32_t
u_int32_t local_id = 0;
struct necp_uuid_id_mapping *existing_mapping = NULL;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
if (allocated_mapping) {
*allocated_mapping = FALSE;
existing_mapping = necp_uuid_lookup_app_id_locked(uuid);
if (existing_mapping != NULL) {
local_id = existing_mapping->id;
- existing_mapping->refcount++;
+ os_ref_retain_locked(&existing_mapping->refcount);
if (uuid_policy_table) {
- existing_mapping->table_refcount++;
+ existing_mapping->table_usecount++;
}
} else {
struct necp_uuid_id_mapping *new_mapping = NULL;
MALLOC(new_mapping, struct necp_uuid_id_mapping *, sizeof(*new_mapping), M_NECP, M_WAITOK);
if (new_mapping != NULL) {
uuid_copy(new_mapping->uuid, uuid);
- new_mapping->id = necp_get_new_uuid_id();
- new_mapping->refcount = 1;
+ new_mapping->id = necp_get_new_uuid_id(false);
+ os_ref_init(&new_mapping->refcount, &necp_refgrp);
if (uuid_policy_table) {
- new_mapping->table_refcount = 1;
+ new_mapping->table_usecount = 1;
} else {
- new_mapping->table_refcount = 0;
+ new_mapping->table_usecount = 0;
}
LIST_INSERT_HEAD(APPUUIDHASH(uuid), new_mapping, chain);
}
}
- return (local_id);
+ return local_id;
}
static bool
{
struct necp_uuid_id_mapping *existing_mapping = NULL;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
if (removed_mapping) {
*removed_mapping = FALSE;
existing_mapping = necp_uuid_lookup_app_id_locked(uuid);
if (existing_mapping != NULL) {
if (uuid_policy_table) {
- existing_mapping->table_refcount--;
+ existing_mapping->table_usecount--;
}
- if (--existing_mapping->refcount == 0) {
+ if (os_ref_release_locked(&existing_mapping->refcount) == 0) {
LIST_REMOVE(existing_mapping, chain);
FREE(existing_mapping, M_NECP);
if (removed_mapping) {
*removed_mapping = TRUE;
}
}
- return (TRUE);
+ return TRUE;
}
- return (FALSE);
+ return FALSE;
}
static struct necp_uuid_id_mapping *
static struct necp_uuid_id_mapping null_mapping;
uuid_clear(null_mapping.uuid);
null_mapping.id = NECP_NULL_SERVICE_ID;
-
- return (&null_mapping);
+
+ return &null_mapping;
}
static struct necp_uuid_id_mapping *
{
struct necp_uuid_id_mapping *searchentry = NULL;
struct necp_uuid_id_mapping *foundentry = NULL;
-
+
if (uuid_is_null(uuid)) {
return necp_uuid_get_null_service_id_mapping();
}
-
+
LIST_FOREACH(searchentry, &necp_uuid_service_id_list, chain) {
if (uuid_compare(searchentry->uuid, uuid) == 0) {
foundentry = searchentry;
}
}
- return (foundentry);
+ return foundentry;
}
static struct necp_uuid_id_mapping *
{
struct necp_uuid_id_mapping *searchentry = NULL;
struct necp_uuid_id_mapping *foundentry = NULL;
-
+
if (local_id == NECP_NULL_SERVICE_ID) {
return necp_uuid_get_null_service_id_mapping();
}
-
+
LIST_FOREACH(searchentry, &necp_uuid_service_id_list, chain) {
if (searchentry->id == local_id) {
foundentry = searchentry;
}
}
- return (foundentry);
+ return foundentry;
}
static u_int32_t
{
u_int32_t local_id = 0;
struct necp_uuid_id_mapping *existing_mapping = NULL;
-
+
if (uuid_is_null(uuid)) {
- return (NECP_NULL_SERVICE_ID);
+ return NECP_NULL_SERVICE_ID;
}
-
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
existing_mapping = necp_uuid_lookup_service_id_locked(uuid);
if (existing_mapping != NULL) {
local_id = existing_mapping->id;
- existing_mapping->refcount++;
+ os_ref_retain_locked(&existing_mapping->refcount);
} else {
struct necp_uuid_id_mapping *new_mapping = NULL;
MALLOC(new_mapping, struct necp_uuid_id_mapping *, sizeof(*new_mapping), M_NECP, M_WAITOK);
if (new_mapping != NULL) {
uuid_copy(new_mapping->uuid, uuid);
- new_mapping->id = necp_get_new_uuid_id();
- new_mapping->refcount = 1;
+ new_mapping->id = necp_get_new_uuid_id(true);
+ os_ref_init(&new_mapping->refcount, &necp_refgrp);
LIST_INSERT_HEAD(&necp_uuid_service_id_list, new_mapping, chain);
}
}
- return (local_id);
+ return local_id;
}
static bool
necp_remove_uuid_service_id_mapping(uuid_t uuid)
{
struct necp_uuid_id_mapping *existing_mapping = NULL;
-
+
if (uuid_is_null(uuid)) {
- return (TRUE);
+ return TRUE;
}
-
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
- existing_mapping = necp_uuid_lookup_app_id_locked(uuid);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+
+ existing_mapping = necp_uuid_lookup_service_id_locked(uuid);
if (existing_mapping != NULL) {
- if (--existing_mapping->refcount == 0) {
+ if (os_ref_release_locked(&existing_mapping->refcount) == 0) {
LIST_REMOVE(existing_mapping, chain);
FREE(existing_mapping, M_NECP);
}
- return (TRUE);
+ return TRUE;
}
- return (FALSE);
+ return FALSE;
}
static bool
necp_kernel_socket_policies_update_uuid_table(void)
{
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
if (necp_uuid_app_id_mappings_dirty) {
if (proc_uuid_policy_kernel(PROC_UUID_POLICY_OPERATION_CLEAR, NULL, PROC_UUID_NECP_APP_POLICY) < 0) {
NECPLOG0(LOG_DEBUG, "Error clearing uuids from policy table\n");
- return (FALSE);
+ return FALSE;
}
if (necp_num_uuid_app_id_mappings > 0) {
for (uuid_list_head = &necp_uuid_app_id_hashtbl[necp_uuid_app_id_hash_num_buckets - 1]; uuid_list_head >= necp_uuid_app_id_hashtbl; uuid_list_head--) {
struct necp_uuid_id_mapping *mapping = NULL;
LIST_FOREACH(mapping, uuid_list_head, chain) {
- if (mapping->table_refcount > 0 &&
- proc_uuid_policy_kernel(PROC_UUID_POLICY_OPERATION_ADD, mapping->uuid, PROC_UUID_NECP_APP_POLICY) < 0) {
+ if (mapping->table_usecount > 0 &&
+ proc_uuid_policy_kernel(PROC_UUID_POLICY_OPERATION_ADD, mapping->uuid, PROC_UUID_NECP_APP_POLICY) < 0) {
NECPLOG0(LOG_DEBUG, "Error adding uuid to policy table\n");
}
}
necp_uuid_app_id_mappings_dirty = FALSE;
}
- return (TRUE);
+ return TRUE;
}
-#define NECP_KERNEL_VALID_IP_OUTPUT_CONDITIONS (NECP_KERNEL_CONDITION_ALL_INTERFACES | NECP_KERNEL_CONDITION_BOUND_INTERFACE | NECP_KERNEL_CONDITION_PROTOCOL | NECP_KERNEL_CONDITION_LOCAL_START | NECP_KERNEL_CONDITION_LOCAL_END | NECP_KERNEL_CONDITION_LOCAL_PREFIX | NECP_KERNEL_CONDITION_REMOTE_START | NECP_KERNEL_CONDITION_REMOTE_END | NECP_KERNEL_CONDITION_REMOTE_PREFIX | NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_LAST_INTERFACE)
+#define NECP_KERNEL_VALID_IP_OUTPUT_CONDITIONS (NECP_KERNEL_CONDITION_ALL_INTERFACES | NECP_KERNEL_CONDITION_BOUND_INTERFACE | NECP_KERNEL_CONDITION_PROTOCOL | NECP_KERNEL_CONDITION_LOCAL_START | NECP_KERNEL_CONDITION_LOCAL_END | NECP_KERNEL_CONDITION_LOCAL_PREFIX | NECP_KERNEL_CONDITION_REMOTE_START | NECP_KERNEL_CONDITION_REMOTE_END | NECP_KERNEL_CONDITION_REMOTE_PREFIX | NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_LAST_INTERFACE | NECP_KERNEL_CONDITION_LOCAL_NETWORKS | NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS)
static necp_kernel_policy_id
-necp_kernel_ip_output_policy_add(necp_policy_id parent_policy_id, necp_policy_order order, necp_policy_order suborder, u_int32_t session_order, int session_pid, u_int32_t condition_mask, u_int32_t condition_negated_mask, necp_kernel_policy_id cond_policy_id, ifnet_t cond_bound_interface, u_int32_t cond_last_interface_index, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter)
+necp_kernel_ip_output_policy_add(necp_policy_order order, necp_policy_order suborder, u_int32_t session_order, int session_pid, u_int32_t condition_mask, u_int32_t condition_negated_mask, necp_kernel_policy_id cond_policy_id, ifnet_t cond_bound_interface, u_int32_t cond_last_interface_index, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, u_int16_t cond_packet_filter_tags, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter)
{
struct necp_kernel_ip_output_policy *new_kernel_policy = NULL;
struct necp_kernel_ip_output_policy *tmp_kernel_policy = NULL;
- MALLOC_ZONE(new_kernel_policy, struct necp_kernel_ip_output_policy *, sizeof(*new_kernel_policy), M_NECP_IP_POLICY, M_WAITOK);
- if (new_kernel_policy == NULL) {
- goto done;
- }
-
- memset(new_kernel_policy, 0, sizeof(*new_kernel_policy));
- new_kernel_policy->parent_policy_id = parent_policy_id;
- new_kernel_policy->id = necp_kernel_policy_get_new_id();
+ new_kernel_policy = zalloc_flags(necp_ip_policy_zone, Z_WAITOK | Z_ZERO);
+ new_kernel_policy->id = necp_kernel_policy_get_new_id(false);
new_kernel_policy->suborder = suborder;
new_kernel_policy->order = order;
new_kernel_policy->session_order = session_order;
if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) {
new_kernel_policy->cond_remote_prefix = cond_remote_prefix;
}
+ if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) {
+ new_kernel_policy->cond_packet_filter_tags = cond_packet_filter_tags;
+ }
new_kernel_policy->result = result;
memcpy(&new_kernel_policy->result_parameter, &result_parameter, sizeof(result_parameter));
NECPLOG(LOG_DEBUG, "Added kernel policy: ip output, id=%d, mask=%x\n", new_kernel_policy->id, new_kernel_policy->condition_mask);
}
LIST_INSERT_SORTED_THRICE_ASCENDING(&necp_kernel_ip_output_policies, new_kernel_policy, chain, session_order, order, suborder, tmp_kernel_policy);
-done:
- return (new_kernel_policy ? new_kernel_policy->id : 0);
+
+ return new_kernel_policy ? new_kernel_policy->id : 0;
}
static struct necp_kernel_ip_output_policy *
struct necp_kernel_ip_output_policy *tmp_kernel_policy = NULL;
if (policy_id == 0) {
- return (NULL);
+ return NULL;
}
LIST_FOREACH_SAFE(kernel_policy, &necp_kernel_ip_output_policies, chain, tmp_kernel_policy) {
if (kernel_policy->id == policy_id) {
- return (kernel_policy);
+ return kernel_policy;
}
}
- return (NULL);
+ return NULL;
}
static bool
{
struct necp_kernel_ip_output_policy *policy = NULL;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
policy = necp_kernel_ip_output_policy_find(policy_id);
if (policy) {
policy->cond_bound_interface = NULL;
}
- FREE_ZONE(policy, sizeof(*policy), M_NECP_IP_POLICY);
- return (TRUE);
+ zfree(necp_ip_policy_zone, policy);
+ return TRUE;
}
- return (FALSE);
+ return FALSE;
}
static void
if (upper_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) {
if (upper_policy->session_order != lower_policy->session_order) {
// A skip cannot override a policy of a different session
- return (FALSE);
+ return FALSE;
} else {
if (upper_policy->result_parameter.skip_policy_order == 0 ||
- lower_policy->order >= upper_policy->result_parameter.skip_policy_order) {
+ lower_policy->order >= upper_policy->result_parameter.skip_policy_order) {
// This policy is beyond the skip
- return (FALSE);
+ return FALSE;
} else {
// This policy is inside the skip
- return (TRUE);
+ return TRUE;
}
}
}
// All other IP Output policy results (drop, tunnel, hard pass) currently overlap
- return (TRUE);
+ return TRUE;
}
static bool
// For policies in a skip window, we can't mark conflicting policies as unnecessary
if (can_skip) {
if (highest_skip_session_order != compared_policy->session_order ||
- (highest_skip_order != 0 && compared_policy->order >= highest_skip_order)) {
+ (highest_skip_order != 0 && compared_policy->order >= highest_skip_order)) {
// If we've moved on to the next session, or passed the skip window
highest_skip_session_order = 0;
highest_skip_order = 0;
continue;
}
+ // If new policy matches Local Networks, compared policy must also
+ if ((policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) && !(compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS)) {
+ continue;
+ }
+
// Default makes lower policies unecessary always
if (compared_policy->condition_mask == 0) {
- return (TRUE);
+ return TRUE;
}
// Compared must be more general than policy, and include only conditions within policy
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID &&
- compared_policy->cond_policy_id != policy->cond_policy_id) {
+ compared_policy->cond_policy_id != policy->cond_policy_id) {
continue;
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE &&
- compared_policy->cond_bound_interface != policy->cond_bound_interface) {
+ compared_policy->cond_bound_interface != policy->cond_bound_interface) {
continue;
}
if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_PROTOCOL &&
- compared_policy->cond_protocol != policy->cond_protocol) {
+ compared_policy->cond_protocol != policy->cond_protocol) {
continue;
}
}
} else if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) {
if (compared_policy->cond_local_prefix > policy->cond_local_prefix ||
- !necp_is_addr_in_subnet((struct sockaddr *)&policy->cond_local_start, (struct sockaddr *)&compared_policy->cond_local_start, compared_policy->cond_local_prefix)) {
+ !necp_is_addr_in_subnet((struct sockaddr *)&policy->cond_local_start, (struct sockaddr *)&compared_policy->cond_local_start, compared_policy->cond_local_prefix)) {
continue;
}
}
}
} else if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) {
if (compared_policy->cond_remote_prefix > policy->cond_remote_prefix ||
- !necp_is_addr_in_subnet((struct sockaddr *)&policy->cond_remote_start, (struct sockaddr *)&compared_policy->cond_remote_start, compared_policy->cond_remote_prefix)) {
+ !necp_is_addr_in_subnet((struct sockaddr *)&policy->cond_remote_start, (struct sockaddr *)&compared_policy->cond_remote_start, compared_policy->cond_remote_prefix)) {
continue;
}
}
}
- return (TRUE);
+ return TRUE;
}
- return (FALSE);
+ return FALSE;
}
static bool
int bucket_current_free_index[NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS];
struct necp_kernel_ip_output_policy *kernel_policy = NULL;
- lck_rw_assert(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
+ LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE);
// Reset mask to 0
necp_kernel_ip_output_policies_condition_mask = 0;
necp_kernel_ip_output_policies_condition_mask |= kernel_policy->condition_mask;
necp_kernel_ip_output_policies_count++;
- // Update bucket counts
- if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID)) {
- necp_kernel_ip_output_policies_non_id_count++;
+ /* Update bucket counts:
+ * Non-id and SKIP policies will be added to all buckets
+ * Add local networks policy to all buckets for incoming IP
+ */
+ if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID) ||
+ (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) ||
+ kernel_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) {
for (i = 0; i < NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS; i++) {
bucket_allocation_counts[i]++;
}
+ }
+ if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID)) {
+ necp_kernel_ip_output_policies_non_id_count++;
} else {
bucket_allocation_counts[NECP_IP_OUTPUT_MAP_ID_TO_BUCKET(kernel_policy->cond_policy_id)]++;
}
LIST_FOREACH(kernel_policy, &necp_kernel_ip_output_policies, chain) {
// Insert pointers into map
- if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID)) {
+ if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID) ||
+ (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) ||
+ kernel_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) {
for (i = 0; i < NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS; i++) {
- if (!necp_kernel_ip_output_policy_is_unnecessary(kernel_policy, necp_kernel_ip_output_policies_map[i], bucket_current_free_index[i])) {
+ if (!necp_dedup_policies || !necp_kernel_ip_output_policy_is_unnecessary(kernel_policy, necp_kernel_ip_output_policies_map[i], bucket_current_free_index[i])) {
(necp_kernel_ip_output_policies_map[i])[(bucket_current_free_index[i])] = kernel_policy;
bucket_current_free_index[i]++;
(necp_kernel_ip_output_policies_map[i])[(bucket_current_free_index[i])] = NULL;
}
} else {
i = NECP_IP_OUTPUT_MAP_ID_TO_BUCKET(kernel_policy->cond_policy_id);
- if (!necp_kernel_ip_output_policy_is_unnecessary(kernel_policy, necp_kernel_ip_output_policies_map[i], bucket_current_free_index[i])) {
+ if (!necp_dedup_policies || !necp_kernel_ip_output_policy_is_unnecessary(kernel_policy, necp_kernel_ip_output_policies_map[i], bucket_current_free_index[i])) {
(necp_kernel_ip_output_policies_map[i])[(bucket_current_free_index[i])] = kernel_policy;
bucket_current_free_index[i]++;
(necp_kernel_ip_output_policies_map[i])[(bucket_current_free_index[i])] = NULL;
}
}
necp_kernel_ip_output_policies_dump_all();
- return (TRUE);
+ return TRUE;
fail:
// Free memory, reset mask to 0
necp_kernel_ip_output_policies_map[i] = NULL;
}
}
- return (FALSE);
+ return FALSE;
}
// Outbound Policy Matching
sub.length--;
}
- return (sub);
+ return sub;
}
static char *
MALLOC(trimmed_domain, char *, sub.length + 1, M_NECP, M_WAITOK);
if (trimmed_domain == NULL) {
- return (NULL);
+ return NULL;
}
memcpy(trimmed_domain, sub.string, sub.length);
trimmed_domain[sub.length] = 0;
- return (trimmed_domain);
+ return trimmed_domain;
}
static inline int
}
}
- return (dot_count);
+ return dot_count;
}
static bool
necp_check_suffix(struct substring parent, struct substring suffix, bool require_dot_before_suffix)
{
if (parent.length <= suffix.length) {
- return (FALSE);
+ return FALSE;
}
size_t length_difference = (parent.length - suffix.length);
if (require_dot_before_suffix) {
if (((char *)(parent.string + length_difference - 1))[0] != '.') {
- return (FALSE);
+ return FALSE;
}
}
- return (memcmp(parent.string + length_difference, suffix.string, suffix.length) == 0);
+ // strncasecmp does case-insensitive check for all UTF-8 strings (ignores non-ASCII characters)
+ return strncasecmp(parent.string + length_difference, suffix.string, suffix.length) == 0;
}
static bool
necp_hostname_matches_domain(struct substring hostname_substring, u_int8_t hostname_dot_count, char *domain, u_int8_t domain_dot_count)
{
if (hostname_substring.string == NULL || domain == NULL) {
- return (hostname_substring.string == domain);
+ return hostname_substring.string == domain;
}
struct substring domain_substring;
domain_substring.length = strlen(domain);
if (hostname_dot_count == domain_dot_count) {
+ // strncasecmp does case-insensitive check for all UTF-8 strings (ignores non-ASCII characters)
if (hostname_substring.length == domain_substring.length &&
- memcmp(hostname_substring.string, domain_substring.string, hostname_substring.length) == 0) {
- return (TRUE);
+ strncasecmp(hostname_substring.string, domain_substring.string, hostname_substring.length) == 0) {
+ return TRUE;
}
} else if (domain_dot_count < hostname_dot_count) {
if (necp_check_suffix(hostname_substring, domain_substring, TRUE)) {
- return (TRUE);
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+bool
+net_domain_contains_hostname(char *hostname_string, char *domain_string)
+{
+ if (hostname_string == NULL ||
+ domain_string == NULL) {
+ return false;
+ }
+
+ struct substring hostname_substring;
+ hostname_substring.string = hostname_string;
+ hostname_substring.length = strlen(hostname_string);
+
+ return necp_hostname_matches_domain(hostname_substring,
+ necp_count_dots(hostname_string, hostname_substring.length),
+ domain_string,
+ necp_count_dots(domain_string, strlen(domain_string)));
+}
+
+#define NECP_MAX_STRING_LEN 1024
+
+static char *
+necp_copy_string(char *string, size_t length)
+{
+ char *copied_string = NULL;
+
+ if (length > NECP_MAX_STRING_LEN) {
+ return NULL;
+ }
+
+ MALLOC(copied_string, char *, length + 1, M_NECP, M_WAITOK);
+ if (copied_string == NULL) {
+ return NULL;
+ }
+
+ memcpy(copied_string, string, length);
+ copied_string[length] = 0;
+
+ return copied_string;
+}
+
+static u_int32_t
+necp_get_primary_direct_interface_index(void)
+{
+ u_int32_t interface_index = IFSCOPE_NONE;
+
+ ifnet_head_lock_shared();
+ struct ifnet *ordered_interface = NULL;
+ TAILQ_FOREACH(ordered_interface, &ifnet_ordered_head, if_ordered_link) {
+ const u_int8_t functional_type = if_functional_type(ordered_interface, TRUE);
+ if (functional_type != IFRTYPE_FUNCTIONAL_UNKNOWN &&
+ functional_type != IFRTYPE_FUNCTIONAL_LOOPBACK) {
+ // All known, non-loopback functional types represent direct physical interfaces (Wi-Fi, Cellular, Wired)
+ interface_index = ordered_interface->if_index;
+ break;
+ }
+ }
+ ifnet_head_done();
+
+ return interface_index;
+}
+
+static inline void
+necp_get_parent_cred_result(proc_t proc, struct necp_socket_info *info)
+{
+ task_t task = proc_task(proc ? proc : current_proc());
+ coalition_t coal = task_get_coalition(task, COALITION_TYPE_JETSAM);
+
+ if (coal == COALITION_NULL || coalition_is_leader(task, coal)) {
+ // No parent, nothing to do
+ return;
+ }
+
+ task_t lead_task = coalition_get_leader(coal);
+ if (lead_task != NULL) {
+ proc_t lead_proc = get_bsdtask_info(lead_task);
+ if (lead_proc != NULL) {
+ kauth_cred_t lead_cred = kauth_cred_proc_ref(lead_proc);
+ if (lead_cred != NULL) {
+ errno_t cred_result = priv_check_cred(lead_cred, PRIV_NET_PRIVILEGED_NECP_MATCH, 0);
+ kauth_cred_unref(&lead_cred);
+ info->cred_result = cred_result;
+ }
+ }
+ task_deallocate(lead_task);
+ }
+}
+
+// Some processes, due to particular entitlements, require using an NECP client to
+// access networking. Returns true if the result should be a Drop.
+static inline bool
+necp_check_missing_client_drop(proc_t proc, struct necp_socket_info *info)
+{
+ task_t task = proc_task(proc ? proc : current_proc());
+
+ if (!info->has_client &&
+ task != NULL &&
+ IOTaskHasEntitlement(task, "com.apple.developer.on-demand-install-capable")) {
+ // Drop connections that don't use NECP clients and have the
+ // com.apple.developer.on-demand-install-capable entitlement.
+ // This effectively restricts those processes to only using
+ // an NECP-aware path for networking.
+ return true;
+ } else {
+ return false;
+ }
+}
+
+static inline bool
+necp_check_restricted_multicast_drop(proc_t proc, struct necp_socket_info *info, bool check_minor_version)
+{
+ if (!necp_restrict_multicast || proc == NULL) {
+ return false;
+ }
+
+ // Check for multicast/broadcast here
+ if (info->remote_addr.sa.sa_family == AF_INET) {
+ if (!IN_MULTICAST(ntohl(info->remote_addr.sin.sin_addr.s_addr)) &&
+ info->remote_addr.sin.sin_addr.s_addr != INADDR_BROADCAST) {
+ return false;
+ }
+ } else if (info->remote_addr.sa.sa_family == AF_INET6) {
+ if (!IN6_IS_ADDR_MULTICAST(&info->remote_addr.sin6.sin6_addr)) {
+ return false;
}
+ } else {
+ // Not IPv4/IPv6
+ return false;
+ }
+
+ if (necp_is_platform_binary(proc)) {
+ return false;
+ }
+
+ const uint32_t platform = proc_platform(proc);
+ const uint32_t sdk = proc_sdk(proc);
+
+ // Enforce for iOS, linked on or after version 14
+ // If the caller set `check_minor_version`, only enforce starting at 14.TBD
+ if (platform != PLATFORM_IOS ||
+ sdk == 0 ||
+ (sdk >> 16) < 14 ||
+#if 0
+ (check_minor_version && (sdk >> 16) == 14 && ((sdk >> 8) & 0xff) < TBD)) {
+#else
+ (check_minor_version)) {
+#endif
+ return false;
+ }
+
+ // Allow entitled processes to use multicast
+ task_t task = proc_task(proc);
+ if (task != NULL &&
+ IOTaskHasEntitlement(task, "com.apple.developer.networking.multicast")) {
+ return false;
}
- return (FALSE);
+ const uint32_t min_sdk = proc_min_sdk(proc);
+ NECPLOG(LOG_INFO, "Dropping unentitled multicast (SDK 0x%x, min 0x%x)", sdk, min_sdk);
+
+ return true;
}
-#define NECP_KERNEL_ADDRESS_TYPE_CONDITIONS (NECP_KERNEL_CONDITION_LOCAL_START | NECP_KERNEL_CONDITION_LOCAL_END | NECP_KERNEL_CONDITION_LOCAL_PREFIX | NECP_KERNEL_CONDITION_REMOTE_START | NECP_KERNEL_CONDITION_REMOTE_END | NECP_KERNEL_CONDITION_REMOTE_PREFIX)
+#define NECP_KERNEL_ADDRESS_TYPE_CONDITIONS (NECP_KERNEL_CONDITION_LOCAL_START | NECP_KERNEL_CONDITION_LOCAL_END | NECP_KERNEL_CONDITION_LOCAL_PREFIX | NECP_KERNEL_CONDITION_REMOTE_START | NECP_KERNEL_CONDITION_REMOTE_END | NECP_KERNEL_CONDITION_REMOTE_PREFIX | NECP_KERNEL_CONDITION_LOCAL_EMPTY | NECP_KERNEL_CONDITION_REMOTE_EMPTY | NECP_KERNEL_CONDITION_LOCAL_NETWORKS)
static void
-necp_application_fillout_info_locked(uuid_t application_uuid, uuid_t real_application_uuid, char *account, char *domain, pid_t pid, uid_t uid, u_int16_t protocol, u_int32_t bound_interface_index, u_int32_t traffic_class, union necp_sockaddr_union *local_addr, union necp_sockaddr_union *remote_addr, struct necp_socket_info *info)
+necp_application_fillout_info_locked(uuid_t application_uuid, uuid_t real_application_uuid, uuid_t responsible_application_uuid, char *account, char *domain, pid_t pid, uid_t uid, u_int16_t protocol, u_int32_t bound_interface_index, u_int32_t traffic_class, union necp_sockaddr_union *local_addr, union necp_sockaddr_union *remote_addr, u_int16_t local_port, u_int16_t remote_port, bool has_client, proc_t proc, proc_t responsible_proc, u_int32_t drop_order, u_int32_t client_flags, struct necp_socket_info *info, bool is_loopback)
{
memset(info, 0, sizeof(struct necp_socket_info));
info->protocol = protocol;
info->bound_interface_index = bound_interface_index;
info->traffic_class = traffic_class;
- info->cred_result = 0; // Don't check the entitlement here, only in the socket layer
+ info->has_client = has_client;
+ info->drop_order = drop_order;
+ info->client_flags = client_flags;
+ info->is_loopback = is_loopback;
if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_APP_ID && !uuid_is_null(application_uuid)) {
struct necp_uuid_id_mapping *existing_mapping = necp_uuid_lookup_app_id_locked(application_uuid);
}
}
+ if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_APP_ID && !uuid_is_null(responsible_application_uuid)) {
+ struct necp_uuid_id_mapping *existing_mapping = necp_uuid_lookup_app_id_locked(responsible_application_uuid);
+ if (existing_mapping != NULL) {
+ info->real_application_id = info->application_id;
+ info->application_id = existing_mapping->id;
+ info->used_responsible_pid = true;
+ }
+ }
+
+ if (info->used_responsible_pid) {
+ proc = responsible_proc;
+ }
+
+ if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_ENTITLEMENT && proc != NULL) {
+ info->cred_result = priv_check_cred(proc_ucred(proc), PRIV_NET_PRIVILEGED_NECP_MATCH, 0);
+ if (info->cred_result != 0) {
+ // Process does not have entitlement, check the parent process
+ necp_get_parent_cred_result(proc, info);
+ }
+ }
+
+ if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_PLATFORM_BINARY && proc != NULL) {
+ info->is_platform_binary = necp_is_platform_binary(proc) ? true : false;
+ }
+
if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID && account != NULL) {
struct necp_string_id_mapping *existing_mapping = necp_lookup_string_to_id_locked(&necp_account_id_list, account);
if (existing_mapping) {
info->domain = domain;
}
- if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_ADDRESS_TYPE_CONDITIONS) {
+ if (necp_restrict_multicast ||
+ (necp_kernel_application_policies_condition_mask & NECP_KERNEL_ADDRESS_TYPE_CONDITIONS)) {
if (local_addr && local_addr->sa.sa_len > 0) {
memcpy(&info->local_addr, local_addr, local_addr->sa.sa_len);
+ if (local_port != 0) {
+ info->local_addr.sin6.sin6_port = local_port;
+ }
+ } else if (local_port != 0) {
+ info->local_addr.sin6.sin6_len = sizeof(struct sockaddr_in6);
+ info->local_addr.sin6.sin6_family = AF_INET6;
+ info->local_addr.sin6.sin6_port = local_port;
}
if (remote_addr && remote_addr->sa.sa_len > 0) {
memcpy(&info->remote_addr, remote_addr, remote_addr->sa.sa_len);
+ if (remote_port != 0) {
+ info->remote_addr.sin6.sin6_port = remote_port;
+ }
+ } else if (remote_port != 0) {
+ info->remote_addr.sin6.sin6_len = sizeof(struct sockaddr_in6);
+ info->remote_addr.sin6.sin6_family = AF_INET6;
+ info->remote_addr.sin6.sin6_port = remote_port;
}
}
}
static void
-necp_send_application_cell_denied_event(pid_t pid, uuid_t proc_uuid)
+necp_send_application_interface_denied_event(pid_t pid, uuid_t proc_uuid, u_int32_t if_functional_type)
{
struct kev_netpolicy_ifdenied ev_ifdenied;
ev_ifdenied.ev_data.epid = pid;
uuid_copy(ev_ifdenied.ev_data.euuid, proc_uuid);
+ ev_ifdenied.ev_if_functional_type = if_functional_type;
netpolicy_post_msg(KEV_NETPOLICY_IFDENIED, &ev_ifdenied.ev_data, sizeof(ev_ifdenied));
}
-static int
-necp_application_find_policy_match_internal(u_int8_t *parameters, u_int32_t parameters_size, struct necp_aggregate_result *returned_result)
+static void
+necp_send_network_denied_event(pid_t pid, uuid_t proc_uuid, u_int32_t network_type)
+{
+ struct kev_netpolicy_netdenied ev_netdenied = {};
+
+ bzero(&ev_netdenied, sizeof(ev_netdenied));
+
+ ev_netdenied.ev_data.epid = pid;
+ uuid_copy(ev_netdenied.ev_data.euuid, proc_uuid);
+ ev_netdenied.ev_network_type = network_type;
+
+ netpolicy_post_msg(KEV_NETPOLICY_NETDENIED, &ev_netdenied.ev_data, sizeof(ev_netdenied));
+}
+
+extern char *proc_name_address(void *p);
+
+#define NECP_VERIFY_DELEGATION_ENTITLEMENT(_p, _d) \
+ if (!has_checked_delegation_entitlement) { \
+ has_delegation_entitlement = (priv_check_cred(proc_ucred(_p), PRIV_NET_PRIVILEGED_SOCKET_DELEGATE, 0) == 0); \
+ has_checked_delegation_entitlement = TRUE; \
+ } \
+ if (!has_delegation_entitlement) { \
+ NECPLOG(LOG_ERR, "%s(%d) does not hold the necessary entitlement to delegate network traffic for other processes by %s", \
+ proc_name_address(_p), proc_pid(_p), _d); \
+ break; \
+ }
+
+int
+necp_application_find_policy_match_internal(proc_t proc,
+ u_int8_t *parameters,
+ u_int32_t parameters_size,
+ struct necp_aggregate_result *returned_result,
+ u_int32_t *flags,
+ u_int32_t *reason,
+ u_int required_interface_index,
+ const union necp_sockaddr_union *override_local_addr,
+ const union necp_sockaddr_union *override_remote_addr,
+ struct necp_client_endpoint *returned_v4_gateway,
+ struct necp_client_endpoint *returned_v6_gateway,
+ struct rtentry **returned_route, bool ignore_address,
+ bool has_client,
+ uuid_t *returned_override_euuid)
{
int error = 0;
size_t offset = 0;
struct necp_kernel_socket_policy *matched_policy = NULL;
struct necp_socket_info info;
necp_kernel_policy_filter filter_control_unit = 0;
- u_int32_t route_rule_id = 0;
necp_kernel_policy_result service_action = 0;
necp_kernel_policy_service service = { 0, 0 };
- pid_t pid = 0;
- uid_t uid = 0;
u_int16_t protocol = 0;
- u_int32_t bound_interface_index = 0;
+ u_int32_t bound_interface_index = required_interface_index;
u_int32_t traffic_class = 0;
+ u_int32_t client_flags = 0;
union necp_sockaddr_union local_addr;
union necp_sockaddr_union remote_addr;
bool no_remote_addr = FALSE;
+ u_int8_t remote_family = 0;
+ bool no_local_addr = FALSE;
+ u_int16_t local_port = 0;
+ u_int16_t remote_port = 0;
+ necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE;
+
+ if (override_local_addr) {
+ memcpy(&local_addr, override_local_addr, sizeof(local_addr));
+ } else {
+ memset(&local_addr, 0, sizeof(local_addr));
+ }
+ if (override_remote_addr) {
+ memcpy(&remote_addr, override_remote_addr, sizeof(remote_addr));
+ } else {
+ memset(&remote_addr, 0, sizeof(remote_addr));
+ }
- memset(&local_addr, 0, sizeof(local_addr));
- memset(&remote_addr, 0, sizeof(remote_addr));
+ // Initialize UID, PID, and UUIDs to the current process
+ uid_t uid = kauth_cred_getuid(proc_ucred(proc));
+ pid_t pid = proc_pid(proc);
uuid_t application_uuid;
uuid_clear(application_uuid);
uuid_t real_application_uuid;
uuid_clear(real_application_uuid);
+ proc_getexecutableuuid(proc, real_application_uuid, sizeof(real_application_uuid));
+ uuid_copy(application_uuid, real_application_uuid);
+ uuid_t responsible_application_uuid;
+ uuid_clear(responsible_application_uuid);
+
char *domain = NULL;
char *account = NULL;
+#define NECP_MAX_REQUIRED_AGENTS 16
+ u_int32_t num_required_agent_types = 0;
+ struct necp_client_parameter_netagent_type required_agent_types[NECP_MAX_REQUIRED_AGENTS];
+ memset(&required_agent_types, 0, sizeof(required_agent_types));
+
u_int32_t netagent_ids[NECP_MAX_NETAGENTS];
+ u_int32_t netagent_use_flags[NECP_MAX_NETAGENTS];
memset(&netagent_ids, 0, sizeof(netagent_ids));
+ memset(&netagent_use_flags, 0, sizeof(netagent_use_flags));
int netagent_cursor;
+ bool has_checked_delegation_entitlement = FALSE;
+ bool has_delegation_entitlement = FALSE;
+
+ proc_t responsible_proc = PROC_NULL;
+ proc_t effective_proc = proc;
+ bool release_eproc = false;
+ necp_socket_bypass_type_t bypass_type = NECP_BYPASS_TYPE_NONE;
+
+ u_int32_t flow_divert_aggregate_unit = 0;
+
if (returned_result == NULL) {
- return (EINVAL);
+ return EINVAL;
+ }
+
+ if (returned_v4_gateway != NULL) {
+ memset(returned_v4_gateway, 0, sizeof(struct necp_client_endpoint));
+ }
+
+ if (returned_v6_gateway != NULL) {
+ memset(returned_v6_gateway, 0, sizeof(struct necp_client_endpoint));
+ }
+
+ if (returned_override_euuid != NULL) {
+ uuid_clear(*returned_override_euuid);
}
memset(returned_result, 0, sizeof(struct necp_aggregate_result));
+ u_int32_t drop_order = necp_process_drop_order(proc_ucred(proc));
+
+ necp_kernel_policy_result drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE;
+
lck_rw_lock_shared(&necp_kernel_policy_lock);
if (necp_kernel_application_policies_count == 0) {
- if (necp_drop_all_order > 0) {
+ if (necp_drop_all_order > 0 || drop_order > 0) {
returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP;
lck_rw_done(&necp_kernel_policy_lock);
- return (0);
+ return 0;
}
}
lck_rw_done(&necp_kernel_policy_lock);
u_int8_t type = necp_buffer_get_tlv_type(parameters, offset);
u_int32_t length = necp_buffer_get_tlv_length(parameters, offset);
- if (length > 0 && (offset + sizeof(u_int8_t) + sizeof(u_int32_t) + length) <= parameters_size) {
+ if (length > (parameters_size - (offset + sizeof(u_int8_t) + sizeof(u_int32_t)))) {
+ // If the length is larger than what can fit in the remaining parameters size, bail
+ NECPLOG(LOG_ERR, "Invalid TLV length (%u)", length);
+ break;
+ }
+
+ if (length > 0) {
u_int8_t *value = necp_buffer_get_tlv_value(parameters, offset, NULL);
if (value != NULL) {
switch (type) {
- case NECP_POLICY_CONDITION_APPLICATION: {
- if (length >= sizeof(uuid_t)) {
- uuid_copy(application_uuid, value);
+ case NECP_CLIENT_PARAMETER_APPLICATION: {
+ if (length >= sizeof(uuid_t)) {
+ if (uuid_compare(application_uuid, value) == 0) {
+ // No delegation
+ break;
}
- break;
+
+ NECP_VERIFY_DELEGATION_ENTITLEMENT(proc, "euuid");
+
+ uuid_copy(application_uuid, value);
}
- case NECP_POLICY_CONDITION_REAL_APPLICATION: {
- if (length >= sizeof(uuid_t)) {
- uuid_copy(real_application_uuid, value);
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_REAL_APPLICATION: {
+ if (length >= sizeof(uuid_t)) {
+ if (uuid_compare(real_application_uuid, value) == 0) {
+ // No delegation
+ break;
}
- break;
- }
- case NECP_POLICY_CONDITION_DOMAIN: {
- domain = (char *)value;
- domain[length - 1] = 0;
- break;
- }
- case NECP_POLICY_CONDITION_ACCOUNT: {
- account = (char *)value;
- account[length - 1] = 0;
- break;
+
+ NECP_VERIFY_DELEGATION_ENTITLEMENT(proc, "uuid");
+
+ uuid_copy(real_application_uuid, value);
}
- case NECP_POLICY_CONDITION_TRAFFIC_CLASS: {
- if (length >= sizeof(u_int32_t)) {
- memcpy(&traffic_class, value, sizeof(u_int32_t));
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_PID: {
+ if (length >= sizeof(pid_t)) {
+ if (memcmp(&pid, value, sizeof(pid_t)) == 0) {
+ // No delegation
+ break;
}
- break;
+
+ NECP_VERIFY_DELEGATION_ENTITLEMENT(proc, "pid");
+
+ memcpy(&pid, value, sizeof(pid_t));
}
- case NECP_POLICY_CONDITION_PID: {
- if (length >= sizeof(pid_t)) {
- memcpy(&pid, value, sizeof(pid_t));
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_UID: {
+ if (length >= sizeof(uid_t)) {
+ if (memcmp(&uid, value, sizeof(uid_t)) == 0) {
+ // No delegation
+ break;
}
- break;
+
+ NECP_VERIFY_DELEGATION_ENTITLEMENT(proc, "uid");
+
+ memcpy(&uid, value, sizeof(uid_t));
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_DOMAIN: {
+ domain = (char *)value;
+ domain[length - 1] = 0;
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_ACCOUNT: {
+ account = (char *)value;
+ account[length - 1] = 0;
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_TRAFFIC_CLASS: {
+ if (length >= sizeof(u_int32_t)) {
+ memcpy(&traffic_class, value, sizeof(u_int32_t));
}
- case NECP_POLICY_CONDITION_UID: {
- if (length >= sizeof(uid_t)) {
- memcpy(&uid, value, sizeof(uid_t));
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_IP_PROTOCOL: {
+ if (length >= sizeof(u_int16_t)) {
+ memcpy(&protocol, value, sizeof(u_int16_t));
+ } else if (length >= sizeof(u_int8_t)) {
+ memcpy(&protocol, value, sizeof(u_int8_t));
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_BOUND_INTERFACE: {
+ if (length <= IFXNAMSIZ && length > 0) {
+ ifnet_t bound_interface = NULL;
+ char interface_name[IFXNAMSIZ];
+ memcpy(interface_name, value, length);
+ interface_name[length - 1] = 0; // Make sure the string is NULL terminated
+ if (ifnet_find_by_name(interface_name, &bound_interface) == 0) {
+ bound_interface_index = bound_interface->if_index;
+ ifnet_release(bound_interface);
}
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_LOCAL_ADDRESS: {
+ if (ignore_address || override_local_addr) {
break;
}
- case NECP_POLICY_CONDITION_IP_PROTOCOL: {
- if (length >= sizeof(u_int16_t)) {
- memcpy(&protocol, value, sizeof(u_int16_t));
+
+ if (length >= sizeof(struct necp_policy_condition_addr)) {
+ struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value;
+ if (necp_address_is_valid(&address_struct->address.sa)) {
+ memcpy(&local_addr, &address_struct->address, sizeof(address_struct->address));
}
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_REMOTE_ADDRESS: {
+ if (ignore_address || override_remote_addr) {
break;
}
- case NECP_POLICY_CONDITION_BOUND_INTERFACE: {
- if (length <= IFXNAMSIZ && length > 0) {
- ifnet_t bound_interface = NULL;
- char interface_name[IFXNAMSIZ];
- memcpy(interface_name, value, length);
- interface_name[length - 1] = 0; // Make sure the string is NULL terminated
- if (ifnet_find_by_name(interface_name, &bound_interface) == 0) {
- bound_interface_index = bound_interface->if_index;
- }
+
+ if (length >= sizeof(struct necp_policy_condition_addr)) {
+ struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value;
+ if (necp_address_is_valid(&address_struct->address.sa)) {
+ memcpy(&remote_addr, &address_struct->address, sizeof(address_struct->address));
}
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_LOCAL_ENDPOINT: {
+ if (ignore_address || override_local_addr) {
break;
}
- case NECP_POLICY_CONDITION_LOCAL_ADDR: {
- if (length >= sizeof(struct necp_policy_condition_addr)) {
- struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value;
- memcpy(&local_addr, &address_struct->address, sizeof(address_struct->address));
+
+ if (length >= sizeof(struct necp_client_endpoint)) {
+ struct necp_client_endpoint *endpoint = (struct necp_client_endpoint *)(void *)value;
+ if (endpoint->u.endpoint.endpoint_family == AF_UNSPEC &&
+ endpoint->u.endpoint.endpoint_port != 0) {
+ // Save port
+ local_port = endpoint->u.endpoint.endpoint_port;
}
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_REMOTE_ENDPOINT: {
+ if (ignore_address || override_remote_addr) {
break;
}
- case NECP_POLICY_CONDITION_REMOTE_ADDR: {
- if (length >= sizeof(struct necp_policy_condition_addr)) {
- struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value;
- memcpy(&remote_addr, &address_struct->address, sizeof(address_struct->address));
+
+ if (length >= sizeof(struct necp_client_endpoint)) {
+ struct necp_client_endpoint *endpoint = (struct necp_client_endpoint *)(void *)value;
+ if (endpoint->u.endpoint.endpoint_family == AF_UNSPEC &&
+ endpoint->u.endpoint.endpoint_port != 0) {
+ // Save port
+ remote_port = endpoint->u.endpoint.endpoint_port;
}
- break;
}
- default: {
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_FLAGS: {
+ if (length >= sizeof(client_flags)) {
+ memcpy(&client_flags, value, sizeof(client_flags));
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_REQUIRE_AGENT_TYPE:
+ case NECP_CLIENT_PARAMETER_PREFER_AGENT_TYPE: {
+ if (num_required_agent_types >= NECP_MAX_REQUIRED_AGENTS) {
break;
}
+ if (length >= sizeof(struct necp_client_parameter_netagent_type)) {
+ memcpy(&required_agent_types[num_required_agent_types], value, sizeof(struct necp_client_parameter_netagent_type));
+ num_required_agent_types++;
+ }
+ break;
+ }
+ default: {
+ break;
+ }
}
}
}
offset += sizeof(u_int8_t) + sizeof(u_int32_t) + length;
}
+ // Check for loopback exception
+ if (necp_pass_loopback > 0 && necp_is_loopback(&local_addr.sa, &remote_addr.sa, NULL, NULL, bound_interface_index)) {
+ bypass_type = NECP_BYPASS_TYPE_LOOPBACK;
+ }
+
+ if (bypass_type == NECP_BYPASS_TYPE_LOOPBACK && necp_pass_loopback == NECP_LOOPBACK_PASS_ALL) {
+ returned_result->policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_PASS;
+ returned_result->routed_interface_index = lo_ifp->if_index;
+ *flags |= (NECP_CLIENT_RESULT_FLAG_IS_LOCAL | NECP_CLIENT_RESULT_FLAG_IS_DIRECT);
+ return 0;
+ }
+
+ if (proc_pid(effective_proc) != pid) {
+ proc_t found_proc = proc_find(pid);
+ if (found_proc != PROC_NULL) {
+ effective_proc = found_proc;
+ release_eproc = true;
+ }
+ }
+#if defined(XNU_TARGET_OS_OSX)
+ if (effective_proc->p_responsible_pid > 0 && effective_proc->p_responsible_pid != pid) {
+ responsible_proc = proc_find(effective_proc->p_responsible_pid);
+ if (responsible_proc != PROC_NULL) {
+ proc_getexecutableuuid(responsible_proc, responsible_application_uuid, sizeof(responsible_application_uuid));
+ }
+ }
+#endif /* defined(XNU_TARGET_OS_OSX) */
+
// Lock
lck_rw_lock_shared(&necp_kernel_policy_lock);
- necp_application_fillout_info_locked(application_uuid, real_application_uuid, account, domain, pid, uid, protocol, bound_interface_index, traffic_class, &local_addr, &remote_addr, &info);
- matched_policy = necp_socket_find_policy_match_with_info_locked(necp_kernel_socket_policies_app_layer_map, &info, &filter_control_unit, &route_rule_id, &service_action, &service, netagent_ids, NECP_MAX_NETAGENTS);
+ u_int32_t route_rule_id_array[MAX_AGGREGATE_ROUTE_RULES];
+ size_t route_rule_id_array_count = 0;
+ necp_application_fillout_info_locked(application_uuid, real_application_uuid, responsible_application_uuid, account, domain, pid, uid, protocol, bound_interface_index, traffic_class, &local_addr, &remote_addr, local_port, remote_port, has_client, effective_proc, responsible_proc, drop_order, client_flags, &info, (bypass_type == NECP_BYPASS_TYPE_LOOPBACK));
+ matched_policy = necp_socket_find_policy_match_with_info_locked(necp_kernel_socket_policies_app_layer_map, &info, &filter_control_unit, route_rule_id_array, &route_rule_id_array_count, MAX_AGGREGATE_ROUTE_RULES, &service_action, &service, netagent_ids, netagent_use_flags, NECP_MAX_NETAGENTS, required_agent_types, num_required_agent_types, info.used_responsible_pid ? responsible_proc : effective_proc, 0, NULL, NULL, &drop_dest_policy_result, &drop_all_bypass, &flow_divert_aggregate_unit);
+
+ // Check for loopback exception again after the policy match
+ if (bypass_type == NECP_BYPASS_TYPE_LOOPBACK &&
+ necp_pass_loopback == NECP_LOOPBACK_PASS_WITH_FILTER &&
+ (matched_policy == NULL || matched_policy->result != NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT)) {
+ if (filter_control_unit == NECP_FILTER_UNIT_NO_FILTER) {
+ returned_result->filter_control_unit = 0;
+ } else {
+ returned_result->filter_control_unit = filter_control_unit;
+ }
+
+ if (flow_divert_aggregate_unit > 0) {
+ returned_result->flow_divert_aggregate_unit = flow_divert_aggregate_unit;
+ }
+
+ returned_result->policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_PASS;
+ returned_result->routed_interface_index = lo_ifp->if_index;
+ *flags |= (NECP_CLIENT_RESULT_FLAG_IS_LOCAL | NECP_CLIENT_RESULT_FLAG_IS_DIRECT);
+ error = 0;
+ goto done;
+ }
+
if (matched_policy) {
returned_result->policy_id = matched_policy->id;
returned_result->routing_result = matched_policy->result;
memcpy(&returned_result->routing_result_parameter, &matched_policy->result_parameter, sizeof(returned_result->routing_result_parameter));
+ if (returned_override_euuid != NULL && info.used_responsible_pid && !(matched_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID)) {
+ uuid_copy(*returned_override_euuid, responsible_application_uuid);
+ }
+ } else {
+ bool drop_all = false;
+ if (necp_drop_all_order > 0 || info.drop_order > 0 || drop_dest_policy_result == NECP_KERNEL_POLICY_RESULT_DROP) {
+ // Mark socket as a drop if drop_all is set
+ drop_all = true;
+ if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) {
+ drop_all_bypass = necp_check_drop_all_bypass_result(proc);
+ }
+ }
+ if (drop_all && drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) {
+ returned_result->policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP;
+ } else {
+ returned_result->policy_id = 0;
+ returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_NONE;
+ }
+ }
+ if (necp_check_missing_client_drop(proc, &info) ||
+ necp_check_restricted_multicast_drop(proc, &info, false)) {
+ // Mark as drop
+ returned_result->policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP;
+ }
+ if (filter_control_unit == NECP_FILTER_UNIT_NO_FILTER) {
+ returned_result->filter_control_unit = 0;
} else {
- returned_result->policy_id = 0;
- returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_NONE;
+ returned_result->filter_control_unit = filter_control_unit;
+ }
+
+ if (flow_divert_aggregate_unit > 0) {
+ returned_result->flow_divert_aggregate_unit = flow_divert_aggregate_unit;
}
- returned_result->filter_control_unit = filter_control_unit;
+
returned_result->service_action = service_action;
// Handle trigger service
mapping = necp_uuid_lookup_uuid_with_service_id_locked(netagent_id);
if (mapping != NULL) {
uuid_copy(returned_result->netagents[netagent_cursor], mapping->uuid);
- returned_result->netagent_flags[netagent_cursor] = netagent_get_flags(mapping->uuid);
+ returned_result->netagent_use_flags[netagent_cursor] = netagent_use_flags[netagent_cursor];
}
}
output_bound_interface = returned_result->routing_result_parameter.scoped_interface_index;
} else if (returned_result->routing_result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL) {
output_bound_interface = returned_result->routing_result_parameter.tunnel_interface_index;
+ } else if (returned_result->routing_result == NECP_KERNEL_POLICY_RESULT_SCOPED_DIRECT) {
+ output_bound_interface = necp_get_primary_direct_interface_index();
+ if (output_bound_interface == IFSCOPE_NONE) {
+ returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP;
+ } else {
+ returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED;
+ returned_result->routing_result_parameter.scoped_interface_index = output_bound_interface;
+ }
+ }
+
+ if (returned_result->routing_result == NECP_KERNEL_POLICY_RESULT_DROP &&
+ returned_result->routing_result_parameter.drop_flags & NECP_KERNEL_POLICY_DROP_FLAG_LOCAL_NETWORK) {
+ // Trigger the event that we dropped due to a local network policy
+ necp_send_network_denied_event(pid, application_uuid, NETPOLICY_NETWORKTYPE_LOCAL);
+ if (reason != NULL) {
+ *reason = NECP_CLIENT_RESULT_REASON_LOCAL_NETWORK_PROHIBITED;
+ }
+ }
+
+ if (local_addr.sa.sa_len == 0 ||
+ (local_addr.sa.sa_family == AF_INET && local_addr.sin.sin_addr.s_addr == 0) ||
+ (local_addr.sa.sa_family == AF_INET6 && IN6_IS_ADDR_UNSPECIFIED(&local_addr.sin6.sin6_addr))) {
+ no_local_addr = TRUE;
}
- if (remote_addr.sa.sa_len == 0) {
+ if (remote_addr.sa.sa_len == 0 ||
+ (remote_addr.sa.sa_family == AF_INET && remote_addr.sin.sin_addr.s_addr == 0) ||
+ (remote_addr.sa.sa_family == AF_INET6 && IN6_IS_ADDR_UNSPECIFIED(&remote_addr.sin6.sin6_addr))) {
no_remote_addr = TRUE;
- // Default to 0.0.0.0:0
- remote_addr.sa.sa_family = AF_INET;
- remote_addr.sa.sa_len = sizeof(struct sockaddr_in);
+ remote_family = remote_addr.sa.sa_family;
}
+ returned_result->routed_interface_index = 0;
struct rtentry *rt = NULL;
- rt = rtalloc1_scoped((struct sockaddr *)&remote_addr, 0, 0, output_bound_interface);
+ if (!no_local_addr && (client_flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER) != 0) {
+ // Treat the output bound interface as the routed interface for local address
+ // validation later.
+ returned_result->routed_interface_index = output_bound_interface;
+ } else {
+ if (no_remote_addr) {
+ memset(&remote_addr, 0, sizeof(remote_addr));
+ if (remote_family == AF_INET6) {
+ // Reset address to ::
+ remote_addr.sa.sa_family = AF_INET6;
+ remote_addr.sa.sa_len = sizeof(struct sockaddr_in6);
+ } else {
+ // Reset address to 0.0.0.0
+ remote_addr.sa.sa_family = AF_INET;
+ remote_addr.sa.sa_len = sizeof(struct sockaddr_in);
+ }
+ }
- if (no_remote_addr &&
- (rt == NULL || rt->rt_ifp == NULL)) {
- // Route lookup for default IPv4 failed, try IPv6
+ rt = rtalloc1_scoped((struct sockaddr *)&remote_addr, 0, 0,
+ output_bound_interface);
- // Cleanup old route if necessary
- if (rt != NULL) {
+ if (remote_addr.sa.sa_family == AF_INET && rt != NULL &&
+ IS_INTF_CLAT46(rt->rt_ifp)) {
rtfree(rt);
rt = NULL;
+ returned_result->routed_interface_index = 0;
}
- // Reset address to ::
- memset(&remote_addr, 0, sizeof(remote_addr));
- remote_addr.sa.sa_family = AF_INET6;
- remote_addr.sa.sa_len = sizeof(struct sockaddr_in6);
+ if (no_remote_addr && remote_family == AF_UNSPEC &&
+ (rt == NULL || rt->rt_ifp == NULL)) {
+ // Route lookup for default IPv4 failed, try IPv6
- // Get route
- rt = rtalloc1_scoped((struct sockaddr *)&remote_addr, 0, 0, output_bound_interface);
- }
+ // Cleanup old route if necessary
+ if (rt != NULL) {
+ rtfree(rt);
+ rt = NULL;
+ }
- returned_result->routed_interface_index = 0;
- if (rt != NULL &&
- rt->rt_ifp != NULL) {
- returned_result->routed_interface_index = rt->rt_ifp->if_index;
- /*
- * For local addresses, we allow the interface scope to be
- * either the loopback interface or the interface hosting the
- * local address.
- */
- if (bound_interface_index != IFSCOPE_NONE &&
- rt->rt_ifa != NULL && rt->rt_ifa->ifa_ifp &&
- (output_bound_interface == lo_ifp->if_index ||
- rt->rt_ifp->if_index == lo_ifp->if_index ||
- rt->rt_ifa->ifa_ifp->if_index == bound_interface_index)) {
- struct sockaddr_storage dst;
- unsigned int ifscope = bound_interface_index;
+ // Reset address to ::
+ memset(&remote_addr, 0, sizeof(remote_addr));
+ remote_addr.sa.sa_family = AF_INET6;
+ remote_addr.sa.sa_len = sizeof(struct sockaddr_in6);
+
+ // Get route
+ rt = rtalloc1_scoped((struct sockaddr *)&remote_addr, 0, 0,
+ output_bound_interface);
+ }
+ if (rt != NULL &&
+ rt->rt_ifp != NULL) {
+ returned_result->routed_interface_index = rt->rt_ifp->if_index;
/*
- * Transform dst into the internal routing table form
+ * For local addresses, we allow the interface scope to be
+ * either the loopback interface or the interface hosting the
+ * local address.
*/
- (void) sa_copy((struct sockaddr *)&remote_addr,
- &dst, &ifscope);
+ if (bound_interface_index != IFSCOPE_NONE &&
+ rt->rt_ifa != NULL && rt->rt_ifa->ifa_ifp &&
+ (output_bound_interface == lo_ifp->if_index ||
+ rt->rt_ifp->if_index == lo_ifp->if_index ||
+ rt->rt_ifa->ifa_ifp->if_index == bound_interface_index)) {
+ struct sockaddr_storage dst;
+ unsigned int ifscope = bound_interface_index;
+
+ /*
+ * Transform dst into the internal routing table form
+ */
+ (void) sa_copy((struct sockaddr *)&remote_addr,
+ &dst, &ifscope);
+
+ if ((rt->rt_ifp->if_index == lo_ifp->if_index) ||
+ rt_ifa_is_dst((struct sockaddr *)&dst, rt->rt_ifa)) {
+ returned_result->routed_interface_index =
+ bound_interface_index;
+ }
+ }
+ }
+ }
+
+ if (returned_result->routed_interface_index != 0 &&
+ returned_result->routed_interface_index != lo_ifp->if_index && // Loopback can accept any local address
+ !no_local_addr) {
+ // Transform local_addr into the ifaddr form
+ // IPv6 Scope IDs are always embedded in the ifaddr list
+ struct sockaddr_storage local_address_sanitized;
+ u_int ifscope = IFSCOPE_NONE;
+ (void)sa_copy(&local_addr.sa, &local_address_sanitized, &ifscope);
+ SIN(&local_address_sanitized)->sin_port = 0;
+ if (local_address_sanitized.ss_family == AF_INET6) {
+ SIN6(&local_address_sanitized)->sin6_scope_id = 0;
+ }
+
+ // Validate local address on routed interface
+ struct ifaddr *ifa = ifa_ifwithaddr_scoped((struct sockaddr *)&local_address_sanitized, returned_result->routed_interface_index);
+ if (ifa == NULL) {
+ // Interface address not found, reject route
+ returned_result->routed_interface_index = 0;
+ if (rt != NULL) {
+ rtfree(rt);
+ rt = NULL;
+ }
+ } else {
+ ifaddr_release(ifa);
+ ifa = NULL;
+ }
+ }
+
+ if (flags != NULL) {
+ if ((client_flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER) == 0) {
+ // Check for local/direct
+ bool is_local = FALSE;
+ if (rt != NULL && (rt->rt_flags & RTF_LOCAL)) {
+ is_local = TRUE;
+ } else if (returned_result->routed_interface_index != 0 &&
+ !no_remote_addr) {
+ // Clean up the address before comparison with interface addresses
+
+ // Transform remote_addr into the ifaddr form
+ // IPv6 Scope IDs are always embedded in the ifaddr list
+ struct sockaddr_storage remote_address_sanitized;
+ u_int ifscope = IFSCOPE_NONE;
+ (void)sa_copy(&remote_addr.sa, &remote_address_sanitized, &ifscope);
+ SIN(&remote_address_sanitized)->sin_port = 0;
+ if (remote_address_sanitized.ss_family == AF_INET6) {
+ SIN6(&remote_address_sanitized)->sin6_scope_id = 0;
+ }
+
+ // Check if remote address is an interface address
+ struct ifaddr *ifa = ifa_ifwithaddr((struct sockaddr *)&remote_address_sanitized);
+ if (ifa != NULL && ifa->ifa_ifp != NULL) {
+ u_int if_index_for_remote_addr = ifa->ifa_ifp->if_index;
+ if (if_index_for_remote_addr == returned_result->routed_interface_index ||
+ if_index_for_remote_addr == lo_ifp->if_index) {
+ is_local = TRUE;
+ }
+ }
+ if (ifa != NULL) {
+ ifaddr_release(ifa);
+ ifa = NULL;
+ }
+ }
+
+ if (is_local) {
+ *flags |= (NECP_CLIENT_RESULT_FLAG_IS_LOCAL | NECP_CLIENT_RESULT_FLAG_IS_DIRECT);
+ } else {
+ if (rt != NULL &&
+ !(rt->rt_flags & RTF_GATEWAY) &&
+ (rt->rt_ifa && rt->rt_ifa->ifa_ifp && !(rt->rt_ifa->ifa_ifp->if_flags & IFF_POINTOPOINT))) {
+ // Route is directly accessible
+ *flags |= NECP_CLIENT_RESULT_FLAG_IS_DIRECT;
+ }
+ }
+
+ if (rt != NULL &&
+ rt->rt_ifp != NULL) {
+ // Check probe status
+ if (rt->rt_ifp->if_eflags & IFEF_PROBE_CONNECTIVITY) {
+ *flags |= NECP_CLIENT_RESULT_FLAG_PROBE_CONNECTIVITY;
+ }
+
+ if (rt->rt_ifp->if_type == IFT_CELLULAR) {
+ struct if_cellular_status_v1 *ifsr;
+
+ ifnet_lock_shared(rt->rt_ifp);
+ lck_rw_lock_exclusive(&rt->rt_ifp->if_link_status_lock);
+
+ if (rt->rt_ifp->if_link_status != NULL) {
+ ifsr = &rt->rt_ifp->if_link_status->ifsr_u.ifsr_cell.if_cell_u.if_status_v1;
+
+ if (ifsr->valid_bitmask & IF_CELL_UL_MSS_RECOMMENDED_VALID) {
+ if (ifsr->mss_recommended == IF_CELL_UL_MSS_RECOMMENDED_NONE) {
+ returned_result->mss_recommended = NECP_CLIENT_RESULT_RECOMMENDED_MSS_NONE;
+ } else if (ifsr->mss_recommended == IF_CELL_UL_MSS_RECOMMENDED_MEDIUM) {
+ returned_result->mss_recommended = NECP_CLIENT_RESULT_RECOMMENDED_MSS_MEDIUM;
+ } else if (ifsr->mss_recommended == IF_CELL_UL_MSS_RECOMMENDED_LOW) {
+ returned_result->mss_recommended = NECP_CLIENT_RESULT_RECOMMENDED_MSS_LOW;
+ }
+ }
+ }
+ lck_rw_done(&rt->rt_ifp->if_link_status_lock);
+ ifnet_lock_done(rt->rt_ifp);
+ }
+
+ // Check link quality
+ if ((client_flags & NECP_CLIENT_PARAMETER_FLAG_DISCRETIONARY) &&
+ (rt->rt_ifp->if_interface_state.valid_bitmask & IF_INTERFACE_STATE_LQM_STATE_VALID) &&
+ rt->rt_ifp->if_interface_state.lqm_state == IFNET_LQM_THRESH_ABORT) {
+ *flags |= NECP_CLIENT_RESULT_FLAG_LINK_QUALITY_ABORT;
+ }
+
+ // Check QoS marking (fastlane)
+ for (size_t route_rule_index = 0; route_rule_index < route_rule_id_array_count; route_rule_index++) {
+ if (necp_update_qos_marking(rt->rt_ifp, route_rule_id_array[route_rule_index])) {
+ *flags |= NECP_CLIENT_RESULT_FLAG_ALLOW_QOS_MARKING;
+ // If the route can use QoS markings, stop iterating route rules
+ break;
+ }
+ }
+
+ if (IFNET_IS_LOW_POWER(rt->rt_ifp)) {
+ *flags |= NECP_CLIENT_RESULT_FLAG_INTERFACE_LOW_POWER;
+ }
+
+ if (traffic_class == SO_TC_BK_SYS) {
+ // Block BK_SYS traffic if interface is throttled
+ u_int32_t throttle_level = 0;
+ if (ifnet_get_throttle(rt->rt_ifp, &throttle_level) == 0) {
+ if (throttle_level == IFNET_THROTTLE_OPPORTUNISTIC) {
+ returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP;
+ memset(&returned_result->routing_result_parameter, 0, sizeof(returned_result->routing_result_parameter));
+ }
+ }
+ }
+ }
+ }
+
+ if (returned_result->routed_interface_index != 0) {
+ union necp_sockaddr_union default_address;
+ struct rtentry *v4Route = NULL;
+ struct rtentry *v6Route = NULL;
+
+ memset(&default_address, 0, sizeof(default_address));
+
+ // Reset address to 0.0.0.0
+ default_address.sa.sa_family = AF_INET;
+ default_address.sa.sa_len = sizeof(struct sockaddr_in);
+ v4Route = rtalloc1_scoped((struct sockaddr *)&default_address, 0, 0,
+ returned_result->routed_interface_index);
+
+ // Reset address to ::
+ default_address.sa.sa_family = AF_INET6;
+ default_address.sa.sa_len = sizeof(struct sockaddr_in6);
+ v6Route = rtalloc1_scoped((struct sockaddr *)&default_address, 0, 0,
+ returned_result->routed_interface_index);
+
+ if (v4Route != NULL) {
+ if (v4Route->rt_ifp != NULL && !IS_INTF_CLAT46(v4Route->rt_ifp)) {
+ *flags |= NECP_CLIENT_RESULT_FLAG_HAS_IPV4;
+ }
+ if (returned_v4_gateway != NULL &&
+ v4Route->rt_gateway != NULL &&
+ v4Route->rt_gateway->sa_len == sizeof(returned_v4_gateway->u.sin)) {
+ memcpy(&returned_v4_gateway->u.sin, v4Route->rt_gateway, sizeof(returned_v4_gateway->u.sin));
+ memset(&returned_v4_gateway->u.sin.sin_zero, 0, sizeof(returned_v4_gateway->u.sin.sin_zero));
+ }
+ rtfree(v4Route);
+ v4Route = NULL;
+ }
- if ((rt->rt_ifp->if_index == lo_ifp->if_index) ||
- rt_ifa_is_dst((struct sockaddr *)&dst, rt->rt_ifa))
- returned_result->routed_interface_index =
- bound_interface_index;
+ if (v6Route != NULL) {
+ if (v6Route->rt_ifp != NULL) {
+ *flags |= NECP_CLIENT_RESULT_FLAG_HAS_IPV6;
+
+ if (ifnet_get_nat64prefix(v6Route->rt_ifp, NULL) == 0) {
+ *flags |= NECP_CLIENT_RESULT_FLAG_HAS_NAT64;
+ }
+ }
+ if (returned_v6_gateway != NULL &&
+ v6Route->rt_gateway != NULL &&
+ v6Route->rt_gateway->sa_len == sizeof(returned_v6_gateway->u.sin6)) {
+ memcpy(&returned_v6_gateway->u.sin6, v6Route->rt_gateway, sizeof(returned_v6_gateway->u.sin6));
+ }
+ rtfree(v6Route);
+ v6Route = NULL;
+ }
}
}
- bool cellular_denied = FALSE;
- bool route_is_allowed = necp_route_is_allowed(rt, NULL, route_rule_id, &cellular_denied);
- if (!route_is_allowed) {
- // If the route is blocked, treat the lookup as a drop
- returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP;
- memset(&returned_result->routing_result_parameter, 0, sizeof(returned_result->routing_result_parameter));
+ for (size_t route_rule_index = 0; route_rule_index < route_rule_id_array_count; route_rule_index++) {
+ u_int32_t interface_type_denied = IFRTYPE_FUNCTIONAL_UNKNOWN;
+ bool route_is_allowed = necp_route_is_allowed(rt, NULL, route_rule_id_array[route_rule_index], &interface_type_denied);
+ if (!route_is_allowed) {
+ // If the route is blocked, treat the lookup as a drop
+ returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP;
+ memset(&returned_result->routing_result_parameter, 0, sizeof(returned_result->routing_result_parameter));
+
+ if (interface_type_denied != IFRTYPE_FUNCTIONAL_UNKNOWN) {
+ if (reason != NULL) {
+ if (interface_type_denied == IFRTYPE_FUNCTIONAL_CELLULAR) {
+ *reason = NECP_CLIENT_RESULT_REASON_CELLULAR_DENIED;
+ } else if (interface_type_denied == IFRTYPE_FUNCTIONAL_WIFI_INFRA) {
+ *reason = NECP_CLIENT_RESULT_REASON_WIFI_DENIED;
+ }
+ }
+ necp_send_application_interface_denied_event(pid, application_uuid, interface_type_denied);
+ }
+ // If the route gets denied, stop matching rules
+ break;
+ }
+ }
- if (cellular_denied) {
- necp_send_application_cell_denied_event(pid, application_uuid);
+ if (rt != NULL && rt->rt_ifp != NULL) {
+ const bool expensive_prohibited = ((client_flags & NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_EXPENSIVE) &&
+ IFNET_IS_EXPENSIVE(rt->rt_ifp));
+ const bool constrained_prohibited = ((client_flags & NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_CONSTRAINED) &&
+ IFNET_IS_CONSTRAINED(rt->rt_ifp));
+ if (reason != NULL) {
+ if (expensive_prohibited) {
+ *reason = NECP_CLIENT_RESULT_REASON_EXPENSIVE_PROHIBITED;
+ } else if (constrained_prohibited) {
+ *reason = NECP_CLIENT_RESULT_REASON_CONSTRAINED_PROHIBITED;
+ }
+ }
+ if (expensive_prohibited || constrained_prohibited) {
+ // If the client flags prohibited a property of the interface, treat it as a drop
+ returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP;
+ memset(&returned_result->routing_result_parameter, 0, sizeof(returned_result->routing_result_parameter));
}
}
if (rt != NULL) {
- rtfree(rt);
+ if (returned_route != NULL) {
+ *returned_route = rt;
+ } else {
+ rtfree(rt);
+ }
rt = NULL;
}
+
+done:
// Unlock
lck_rw_done(&necp_kernel_policy_lock);
- return (error);
-}
+ if (release_eproc && effective_proc != PROC_NULL) {
+ proc_rele(effective_proc);
+ }
+#if defined(XNU_TARGET_OS_OSX)
+ if (responsible_proc != PROC_NULL) {
+ proc_rele(responsible_proc);
+ }
+#endif
-#define NECP_MAX_MATCH_POLICY_PARAMETER_SIZE 1024
+ return error;
+}
-int
-necp_match_policy(struct proc *p, struct necp_match_policy_args *uap, int32_t *retval)
+static bool
+necp_is_route_local(union necp_sockaddr_union *remote_addr)
{
-#pragma unused(p, retval)
- u_int8_t *parameters = NULL;
- struct necp_aggregate_result returned_result;
- int error = 0;
+ bool no_remote_addr = FALSE;
+ u_int8_t remote_family = 0;
+ struct rtentry *rt = NULL;
+ bool is_local = FALSE;
- if (uap == NULL) {
- error = EINVAL;
- goto done;
+ if (remote_addr == NULL) {
+ return NULL;
}
- if (uap->parameters == 0 || uap->parameters_size == 0 || uap->parameters_size > NECP_MAX_MATCH_POLICY_PARAMETER_SIZE || uap->returned_result == 0) {
- error = EINVAL;
- goto done;
+ if (remote_addr->sa.sa_len == 0 ||
+ (remote_addr->sa.sa_family == AF_INET && remote_addr->sin.sin_addr.s_addr == 0) ||
+ (remote_addr->sa.sa_family == AF_INET6 && IN6_IS_ADDR_UNSPECIFIED(&remote_addr->sin6.sin6_addr))) {
+ no_remote_addr = TRUE;
+ remote_family = remote_addr->sa.sa_family;
}
- MALLOC(parameters, u_int8_t *, uap->parameters_size, M_NECP, M_WAITOK);
- if (parameters == NULL) {
- error = ENOMEM;
- goto done;
+ if (no_remote_addr) {
+ memset(remote_addr, 0, sizeof(union necp_sockaddr_union));
+ if (remote_family == AF_INET6) {
+ // Reset address to ::
+ remote_addr->sa.sa_family = AF_INET6;
+ remote_addr->sa.sa_len = sizeof(struct sockaddr_in6);
+ } else {
+ // Reset address to 0.0.0.0
+ remote_addr->sa.sa_family = AF_INET;
+ remote_addr->sa.sa_len = sizeof(struct sockaddr_in);
+ }
}
- // Copy parameters in
- copyin(uap->parameters, parameters, uap->parameters_size);
- error = necp_application_find_policy_match_internal(parameters, uap->parameters_size, &returned_result);
- if (error) {
+ // Lookup route regardless of the scoped interface to check if
+ // remote address is in a local network.
+ rt = rtalloc1_scoped((struct sockaddr *)remote_addr, 0, 0, 0);
+
+ if (rt == NULL) {
goto done;
}
+ if (remote_addr->sa.sa_family == AF_INET && IS_INTF_CLAT46(rt->rt_ifp)) {
+ goto free_rt;
+ }
+ is_local = IS_NECP_DEST_IN_LOCAL_NETWORKS(rt);
+
+free_rt:
+ rtfree(rt);
- // Copy return value back
- copyout(&returned_result, uap->returned_result, sizeof(struct necp_aggregate_result));
done:
- if (parameters != NULL) {
- FREE(parameters, M_NECP);
- }
- return (error);
+ return is_local;
}
static bool
-necp_socket_check_policy(struct necp_kernel_socket_policy *kernel_policy, necp_app_id app_id, necp_app_id real_app_id, errno_t cred_result, u_int32_t account_id, struct substring domain, u_int8_t domain_dot_count, pid_t pid, uid_t uid, u_int32_t bound_interface_index, u_int32_t traffic_class, u_int16_t protocol, union necp_sockaddr_union *local, union necp_sockaddr_union *remote)
+necp_socket_check_policy(struct necp_kernel_socket_policy *kernel_policy, necp_app_id app_id, necp_app_id real_app_id, errno_t cred_result, u_int32_t account_id, struct substring domain, u_int8_t domain_dot_count, pid_t pid, uid_t uid, u_int32_t bound_interface_index, u_int32_t traffic_class, u_int16_t protocol, union necp_sockaddr_union *local, union necp_sockaddr_union *remote, struct necp_client_parameter_netagent_type *required_agent_types, u_int32_t num_required_agent_types, bool has_client, uint32_t client_flags, int is_platform_binary, proc_t proc, u_int16_t pf_tag, struct rtentry *rt, bool is_loopback)
{
if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES)) {
if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) {
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) {
if (bound_interface_index == cond_bound_interface_index) {
// No match, matches forbidden interface
- return (FALSE);
+ return FALSE;
}
} else {
if (bound_interface_index != cond_bound_interface_index) {
// No match, does not match required interface
- return (FALSE);
+ return FALSE;
}
}
} else {
if (bound_interface_index != 0) {
// No match, requires a non-bound packet
- return (FALSE);
+ return FALSE;
}
}
}
if (kernel_policy->condition_mask == 0) {
- return (TRUE);
+ return TRUE;
}
if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID) {
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_APP_ID) {
if (app_id == kernel_policy->cond_app_id) {
// No match, matches forbidden application
- return (FALSE);
+ return FALSE;
}
} else {
if (app_id != kernel_policy->cond_app_id) {
// No match, does not match required application
- return (FALSE);
+ return FALSE;
+ }
+ }
+
+ // Check signing identifier only after APP ID matched
+ if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER ||
+ kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER) {
+ u_int8_t matched = necp_boolean_state_false;
+ const char *signing_id = cs_identity_get(proc ? proc : current_proc());
+
+ if (signing_id != NULL) {
+ size_t signing_id_size = strlen(signing_id) + 1;
+ if (memcmp(signing_id, kernel_policy->cond_signing_identifier, signing_id_size) == 0) {
+ matched = necp_boolean_state_true;
+ }
+ }
+
+ if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER) {
+ if (matched == necp_boolean_state_true) {
+ return FALSE;
+ }
+ } else {
+ if (matched != necp_boolean_state_true) {
+ return FALSE;
+ }
}
}
}
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) {
if (real_app_id == kernel_policy->cond_real_app_id) {
// No match, matches forbidden application
- return (FALSE);
+ return FALSE;
}
} else {
if (real_app_id != kernel_policy->cond_real_app_id) {
// No match, does not match required application
- return (FALSE);
+ return FALSE;
}
}
}
-
+
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_HAS_CLIENT) {
+ if (!has_client) {
+ return FALSE;
+ }
+ }
+
if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ENTITLEMENT) {
if (cred_result != 0) {
// Process is missing entitlement
- return (FALSE);
+ return FALSE;
+ }
+ }
+
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PLATFORM_BINARY) {
+ if (is_platform_binary == 0) {
+ // Process is not platform binary
+ return FALSE;
+ }
+ }
+
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SDK_VERSION) {
+ if (proc != NULL) {
+ if (kernel_policy->cond_sdk_version.platform != 0) {
+ if (kernel_policy->cond_sdk_version.platform != proc_platform(proc)) {
+ // Process does not match platform
+ return FALSE;
+ }
+ }
+
+ if (kernel_policy->cond_sdk_version.min_version != 0) {
+ if (kernel_policy->cond_sdk_version.min_version > proc_min_sdk(proc)) {
+ // Process min version is older than required min version
+ return FALSE;
+ }
+ }
+
+ if (kernel_policy->cond_sdk_version.version != 0) {
+ if (kernel_policy->cond_sdk_version.version > proc_sdk(proc)) {
+ // Process SDK version is older than required version
+ return FALSE;
+ }
+ }
+ }
+ }
+
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT) {
+ if (kernel_policy->cond_custom_entitlement_matched == necp_boolean_state_false) {
+ // Process is missing entitlement based on previous check
+ return FALSE;
+ } else if (kernel_policy->cond_custom_entitlement_matched == necp_boolean_state_unknown) {
+ if (kernel_policy->cond_custom_entitlement != NULL) {
+ if (proc == NULL) {
+ // No process found, cannot check entitlement
+ return FALSE;
+ }
+ task_t task = proc_task(proc);
+ if (task == NULL ||
+ !IOTaskHasEntitlement(task, kernel_policy->cond_custom_entitlement)) {
+ // Process is missing custom entitlement
+ kernel_policy->cond_custom_entitlement_matched = necp_boolean_state_false;
+ return FALSE;
+ } else {
+ kernel_policy->cond_custom_entitlement_matched = necp_boolean_state_true;
+ }
+ }
}
}
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_DOMAIN) {
if (domain_matches) {
// No match, matches forbidden domain
- return (FALSE);
+ return FALSE;
}
} else {
if (!domain_matches) {
// No match, does not match required domain
- return (FALSE);
+ return FALSE;
}
}
}
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID) {
if (account_id == kernel_policy->cond_account_id) {
// No match, matches forbidden account
- return (FALSE);
+ return FALSE;
}
} else {
if (account_id != kernel_policy->cond_account_id) {
// No match, does not match required account
- return (FALSE);
+ return FALSE;
}
}
}
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PID) {
if (pid == kernel_policy->cond_pid) {
// No match, matches forbidden pid
- return (FALSE);
+ return FALSE;
}
} else {
if (pid != kernel_policy->cond_pid) {
// No match, does not match required pid
- return (FALSE);
+ return FALSE;
}
}
}
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_UID) {
if (uid == kernel_policy->cond_uid) {
// No match, matches forbidden uid
- return (FALSE);
+ return FALSE;
}
} else {
if (uid != kernel_policy->cond_uid) {
// No match, does not match required uid
- return (FALSE);
+ return FALSE;
}
}
}
-
+
if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS) {
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS) {
if (traffic_class >= kernel_policy->cond_traffic_class.start_tc &&
- traffic_class <= kernel_policy->cond_traffic_class.end_tc) {
+ traffic_class <= kernel_policy->cond_traffic_class.end_tc) {
// No match, matches forbidden traffic class
- return (FALSE);
+ return FALSE;
}
} else {
if (traffic_class < kernel_policy->cond_traffic_class.start_tc ||
- traffic_class > kernel_policy->cond_traffic_class.end_tc) {
+ traffic_class > kernel_policy->cond_traffic_class.end_tc) {
// No match, does not match required traffic class
- return (FALSE);
+ return FALSE;
}
}
}
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PROTOCOL) {
if (protocol == kernel_policy->cond_protocol) {
// No match, matches forbidden protocol
- return (FALSE);
+ return FALSE;
}
} else {
if (protocol != kernel_policy->cond_protocol) {
// No match, does not match required protocol
- return (FALSE);
+ return FALSE;
+ }
+ }
+ }
+
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE) {
+ bool matches_agent_type = FALSE;
+ for (u_int32_t i = 0; i < num_required_agent_types; i++) {
+ struct necp_client_parameter_netagent_type *required_agent_type = &required_agent_types[i];
+ if ((strlen(kernel_policy->cond_agent_type.agent_domain) == 0 ||
+ strncmp(required_agent_type->netagent_domain, kernel_policy->cond_agent_type.agent_domain, NETAGENT_DOMAINSIZE) == 0) &&
+ (strlen(kernel_policy->cond_agent_type.agent_type) == 0 ||
+ strncmp(required_agent_type->netagent_type, kernel_policy->cond_agent_type.agent_type, NETAGENT_TYPESIZE) == 0)) {
+ // Found a required agent that matches
+ matches_agent_type = TRUE;
+ break;
}
}
+ if (!matches_agent_type) {
+ return FALSE;
+ }
+ }
+
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) {
+ bool is_local = FALSE;
+
+ if (rt != NULL) {
+ is_local = IS_NECP_DEST_IN_LOCAL_NETWORKS(rt);
+ } else {
+ is_local = necp_is_route_local(remote);
+ }
+
+ if (!is_local) {
+ // Either no route to validate or no match for local networks
+ return FALSE;
+ }
}
if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) {
bool inRange = necp_is_addr_in_range((struct sockaddr *)local, (struct sockaddr *)&kernel_policy->cond_local_start, (struct sockaddr *)&kernel_policy->cond_local_end);
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_END) {
if (inRange) {
- return (FALSE);
+ return FALSE;
}
} else {
if (!inRange) {
- return (FALSE);
+ return FALSE;
}
}
} else if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) {
bool inSubnet = necp_is_addr_in_subnet((struct sockaddr *)local, (struct sockaddr *)&kernel_policy->cond_local_start, kernel_policy->cond_local_prefix);
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) {
if (inSubnet) {
- return (FALSE);
+ return FALSE;
}
} else {
if (!inSubnet) {
- return (FALSE);
+ return FALSE;
}
}
}
bool inRange = necp_is_addr_in_range((struct sockaddr *)remote, (struct sockaddr *)&kernel_policy->cond_remote_start, (struct sockaddr *)&kernel_policy->cond_remote_end);
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_END) {
if (inRange) {
- return (FALSE);
+ return FALSE;
}
} else {
if (!inRange) {
- return (FALSE);
+ return FALSE;
}
}
} else if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) {
bool inSubnet = necp_is_addr_in_subnet((struct sockaddr *)remote, (struct sockaddr *)&kernel_policy->cond_remote_start, kernel_policy->cond_remote_prefix);
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) {
if (inSubnet) {
- return (FALSE);
+ return FALSE;
}
} else {
if (!inSubnet) {
- return (FALSE);
+ return FALSE;
}
}
}
}
- return (TRUE);
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) {
+ if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) {
+ if ((client_flags & kernel_policy->cond_client_flags) == kernel_policy->cond_client_flags) {
+ // Flags do match, and condition is negative, fail.
+ return FALSE;
+ }
+ } else {
+ if ((client_flags & kernel_policy->cond_client_flags) != kernel_policy->cond_client_flags) {
+ // Flags do not match, fail.
+ return FALSE;
+ }
+ }
+ }
+
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_EMPTY) {
+ bool isEmpty = necp_addr_is_empty((struct sockaddr *)local);
+ if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_EMPTY) {
+ if (isEmpty) {
+ return FALSE;
+ }
+ } else {
+ if (!isEmpty) {
+ return FALSE;
+ }
+ }
+ }
+
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_EMPTY) {
+ bool isEmpty = necp_addr_is_empty((struct sockaddr *)remote);
+ if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_EMPTY) {
+ if (isEmpty) {
+ return FALSE;
+ }
+ } else {
+ if (!isEmpty) {
+ return FALSE;
+ }
+ }
+ }
+
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) {
+ bool tags_matched = false;
+ if (kernel_policy->cond_packet_filter_tags & NECP_POLICY_CONDITION_PACKET_FILTER_TAG_STACK_DROP) {
+ if (pf_tag == PF_TAG_ID_STACK_DROP) {
+ tags_matched = true;
+ }
+ }
+
+ if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) {
+ if (tags_matched) {
+ return FALSE;
+ }
+ } else {
+ if (!tags_matched) {
+ return FALSE;
+ }
+ }
+ }
+
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_IS_LOOPBACK) {
+ if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_IS_LOOPBACK) {
+ if (is_loopback) {
+ return FALSE;
+ }
+ } else {
+ if (!is_loopback) {
+ return FALSE;
+ }
+ }
+ }
+
+ return TRUE;
}
static inline u_int32_t
necp_socket_calc_flowhash_locked(struct necp_socket_info *info)
{
- return (net_flowhash(info, sizeof(*info), necp_kernel_socket_policies_gencount));
+ return net_flowhash(info, sizeof(*info), necp_kernel_socket_policies_gencount);
}
static void
-necp_socket_fillout_info_locked(struct inpcb *inp, struct sockaddr *override_local_addr, struct sockaddr *override_remote_addr, u_int32_t override_bound_interface, struct necp_socket_info *info)
+necp_socket_fillout_info_locked(struct inpcb *inp, struct sockaddr *override_local_addr, struct sockaddr *override_remote_addr, u_int32_t override_bound_interface, u_int32_t drop_order, proc_t *socket_proc, struct necp_socket_info *info, bool is_loopback)
{
struct socket *so = NULL;
+ proc_t sock_proc = NULL;
+ proc_t curr_proc = current_proc();
memset(info, 0, sizeof(struct necp_socket_info));
so = inp->inp_socket;
+ info->drop_order = drop_order;
+ info->is_loopback = is_loopback;
+
if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_PID) {
info->pid = ((so->so_flags & SOF_DELEGATED) ? so->e_pid : so->last_pid);
}
if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_UID) {
info->uid = kauth_cred_getuid(so->so_cred);
}
-
+
if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS) {
info->traffic_class = so->so_traffic_class;
}
+ if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_HAS_CLIENT) {
+ info->has_client = !uuid_is_null(inp->necp_client_uuid);
+ }
+
+ if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) {
+ info->client_flags = 0;
+ if (INP_NO_CONSTRAINED(inp)) {
+ info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_CONSTRAINED;
+ }
+ if (INP_NO_EXPENSIVE(inp)) {
+ info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_EXPENSIVE;
+ }
+ if (inp->inp_socket->so_flags1 & SOF1_CELLFALLBACK) {
+ info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_FALLBACK_TRAFFIC;
+ }
+ if (inp->inp_socket->so_flags1 & SOF1_INBOUND) {
+ info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_INBOUND;
+ }
+ if (inp->inp_socket->so_options & SO_ACCEPTCONN ||
+ inp->inp_flags2 & INP2_EXTERNAL_PORT) {
+ info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_LISTENER;
+ }
+ }
+
if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_PROTOCOL) {
if (inp->inp_ip_p) {
info->protocol = inp->inp_ip_p;
}
if (inp->inp_flags2 & INP2_WANT_APP_POLICY && necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_APP_ID) {
+ u_int32_t responsible_application_id = 0;
+
struct necp_uuid_id_mapping *existing_mapping = necp_uuid_lookup_app_id_locked(((so->so_flags & SOF_DELEGATED) ? so->e_uuid : so->last_uuid));
if (existing_mapping) {
info->application_id = existing_mapping->id;
}
- if (!(so->so_flags & SOF_DELEGATED)) {
+#if defined(XNU_TARGET_OS_OSX)
+ if (so->so_rpid > 0) {
+ existing_mapping = necp_uuid_lookup_app_id_locked(so->so_ruuid);
+ if (existing_mapping != NULL) {
+ responsible_application_id = existing_mapping->id;
+ }
+ }
+#endif
+
+ if (responsible_application_id > 0) {
+ info->real_application_id = info->application_id;
+ info->application_id = responsible_application_id;
+ info->used_responsible_pid = true;
+ } else if (!(so->so_flags & SOF_DELEGATED)) {
info->real_application_id = info->application_id;
} else if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) {
struct necp_uuid_id_mapping *real_existing_mapping = necp_uuid_lookup_app_id_locked(so->last_uuid);
info->real_application_id = real_existing_mapping->id;
}
}
-
+
if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_ENTITLEMENT) {
info->cred_result = priv_check_cred(so->so_cred, PRIV_NET_PRIVILEGED_NECP_MATCH, 0);
+ if (info->cred_result != 0) {
+ // Process does not have entitlement, check the parent process
+ necp_get_parent_cred_result(NULL, info);
+ }
+ }
+ }
+
+ pid_t socket_pid =
+#if defined(XNU_TARGET_OS_OSX)
+ info->used_responsible_pid ? so->so_rpid :
+#endif
+ ((so->so_flags & SOF_DELEGATED) ? so->e_pid : so->last_pid);
+ if (socket_pid && (socket_pid != proc_pid(curr_proc))) {
+ sock_proc = proc_find(socket_pid);
+ if (socket_proc) {
+ *socket_proc = sock_proc;
}
}
+ if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_PLATFORM_BINARY) {
+ info->is_platform_binary = necp_is_platform_binary(sock_proc ? sock_proc : curr_proc) ? true : false;
+ }
+
if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID && inp->inp_necp_attributes.inp_account != NULL) {
struct necp_string_id_mapping *existing_mapping = necp_lookup_string_to_id_locked(&necp_account_id_list, inp->inp_necp_attributes.inp_account);
if (existing_mapping) {
}
}
- if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_ADDRESS_TYPE_CONDITIONS) {
- if (inp->inp_vflag & INP_IPV4) {
- if (override_local_addr) {
+ if (necp_restrict_multicast ||
+ (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_ADDRESS_TYPE_CONDITIONS)) {
+ if (override_local_addr != NULL) {
+ if (override_local_addr->sa_family == AF_INET6 && override_local_addr->sa_len <= sizeof(struct sockaddr_in6)) {
memcpy(&info->local_addr, override_local_addr, override_local_addr->sa_len);
- } else {
+ if (IN6_IS_ADDR_V4MAPPED(&(info->local_addr.sin6.sin6_addr))) {
+ struct sockaddr_in sin;
+ in6_sin6_2_sin(&sin, &(info->local_addr.sin6));
+ memset(&info->local_addr, 0, sizeof(union necp_sockaddr_union));
+ memcpy(&info->local_addr, &sin, sin.sin_len);
+ }
+ } else if (override_local_addr->sa_family == AF_INET && override_local_addr->sa_len <= sizeof(struct sockaddr_in)) {
+ memcpy(&info->local_addr, override_local_addr, override_local_addr->sa_len);
+ }
+ } else {
+ if (inp->inp_vflag & INP_IPV4) {
((struct sockaddr_in *)&info->local_addr)->sin_family = AF_INET;
((struct sockaddr_in *)&info->local_addr)->sin_len = sizeof(struct sockaddr_in);
((struct sockaddr_in *)&info->local_addr)->sin_port = inp->inp_lport;
memcpy(&((struct sockaddr_in *)&info->local_addr)->sin_addr, &inp->inp_laddr, sizeof(struct in_addr));
- }
-
- if (override_remote_addr) {
- memcpy(&info->remote_addr, override_remote_addr, override_remote_addr->sa_len);
- } else {
- ((struct sockaddr_in *)&info->remote_addr)->sin_family = AF_INET;
- ((struct sockaddr_in *)&info->remote_addr)->sin_len = sizeof(struct sockaddr_in);
- ((struct sockaddr_in *)&info->remote_addr)->sin_port = inp->inp_fport;
- memcpy(&((struct sockaddr_in *)&info->remote_addr)->sin_addr, &inp->inp_faddr, sizeof(struct in_addr));
- }
- } else if (inp->inp_vflag & INP_IPV6) {
- if (override_local_addr) {
- memcpy(&info->local_addr, override_local_addr, override_local_addr->sa_len);
- } else {
+ } else if (inp->inp_vflag & INP_IPV6) {
((struct sockaddr_in6 *)&info->local_addr)->sin6_family = AF_INET6;
((struct sockaddr_in6 *)&info->local_addr)->sin6_len = sizeof(struct sockaddr_in6);
((struct sockaddr_in6 *)&info->local_addr)->sin6_port = inp->inp_lport;
memcpy(&((struct sockaddr_in6 *)&info->local_addr)->sin6_addr, &inp->in6p_laddr, sizeof(struct in6_addr));
}
+ }
- if (override_remote_addr) {
+ if (override_remote_addr != NULL) {
+ if (override_remote_addr->sa_family == AF_INET6 && override_remote_addr->sa_len <= sizeof(struct sockaddr_in6)) {
memcpy(&info->remote_addr, override_remote_addr, override_remote_addr->sa_len);
- } else {
+ if (IN6_IS_ADDR_V4MAPPED(&(info->remote_addr.sin6.sin6_addr))) {
+ struct sockaddr_in sin;
+ in6_sin6_2_sin(&sin, &(info->remote_addr.sin6));
+ memset(&info->remote_addr, 0, sizeof(union necp_sockaddr_union));
+ memcpy(&info->remote_addr, &sin, sin.sin_len);
+ }
+ } else if (override_remote_addr->sa_family == AF_INET && override_remote_addr->sa_len <= sizeof(struct sockaddr_in)) {
+ memcpy(&info->remote_addr, override_remote_addr, override_remote_addr->sa_len);
+ }
+ } else {
+ if (inp->inp_vflag & INP_IPV4) {
+ ((struct sockaddr_in *)&info->remote_addr)->sin_family = AF_INET;
+ ((struct sockaddr_in *)&info->remote_addr)->sin_len = sizeof(struct sockaddr_in);
+ ((struct sockaddr_in *)&info->remote_addr)->sin_port = inp->inp_fport;
+ memcpy(&((struct sockaddr_in *)&info->remote_addr)->sin_addr, &inp->inp_faddr, sizeof(struct in_addr));
+ } else if (inp->inp_vflag & INP_IPV6) {
((struct sockaddr_in6 *)&info->remote_addr)->sin6_family = AF_INET6;
((struct sockaddr_in6 *)&info->remote_addr)->sin6_len = sizeof(struct sockaddr_in6);
((struct sockaddr_in6 *)&info->remote_addr)->sin6_port = inp->inp_fport;
}
static inline struct necp_kernel_socket_policy *
-necp_socket_find_policy_match_with_info_locked(struct necp_kernel_socket_policy **policy_search_array, struct necp_socket_info *info, necp_kernel_policy_filter *return_filter, u_int32_t *return_route_rule_id, necp_kernel_policy_result *return_service_action, necp_kernel_policy_service *return_service, u_int32_t *return_netagent_array, size_t netagent_array_count)
+necp_socket_find_policy_match_with_info_locked(struct necp_kernel_socket_policy **policy_search_array, struct necp_socket_info *info,
+ necp_kernel_policy_filter *return_filter,
+ u_int32_t *return_route_rule_id_array, size_t *return_route_rule_id_array_count, size_t route_rule_id_array_count,
+ necp_kernel_policy_result *return_service_action, necp_kernel_policy_service *return_service,
+ u_int32_t *return_netagent_array, u_int32_t *return_netagent_use_flags_array, size_t netagent_array_count,
+ struct necp_client_parameter_netagent_type *required_agent_types,
+ u_int32_t num_required_agent_types, proc_t proc, u_int16_t pf_tag, necp_kernel_policy_id *skip_policy_id, struct rtentry *rt,
+ necp_kernel_policy_result *return_drop_dest_policy_result, necp_drop_all_bypass_check_result_t *return_drop_all_bypass,
+ u_int32_t *return_flow_divert_aggregate_unit)
{
struct necp_kernel_socket_policy *matched_policy = NULL;
u_int32_t skip_order = 0;
u_int32_t skip_session_order = 0;
- u_int32_t route_rule_id_array[MAX_AGGREGATE_ROUTE_RULES];
size_t route_rule_id_count = 0;
int i;
size_t netagent_cursor = 0;
+ necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE;
+ if (return_drop_all_bypass != NULL) {
+ *return_drop_all_bypass = drop_all_bypass;
+ }
// Pre-process domain for quick matching
struct substring domain_substring = necp_trim_dots_and_stars(info->domain, info->domain ? strlen(info->domain) : 0);
u_int8_t domain_dot_count = necp_count_dots(domain_substring.string, domain_substring.length);
- if (return_filter) {
+ if (return_filter != NULL) {
*return_filter = 0;
}
- if (return_route_rule_id) {
- *return_route_rule_id = 0;
+ if (return_route_rule_id_array_count != NULL) {
+ *return_route_rule_id_array_count = 0;
}
- if (return_service_action) {
+ if (return_service_action != NULL) {
*return_service_action = 0;
}
- if (return_service) {
+ if (return_service != NULL) {
return_service->identifier = 0;
return_service->data = 0;
}
+ // Do not subject layer-2 filter to NECP policies, return a PASS policy
+ if (necp_pass_interpose > 0 && info->client_flags & NECP_CLIENT_PARAMETER_FLAG_INTERPOSE) {
+ return &pass_policy;
+ }
+
+ *return_drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE;
+
if (policy_search_array != NULL) {
for (i = 0; policy_search_array[i] != NULL; i++) {
if (necp_drop_all_order != 0 && policy_search_array[i]->session_order >= necp_drop_all_order) {
// We've hit a drop all rule
+ if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) {
+ drop_all_bypass = necp_check_drop_all_bypass_result(proc);
+ if (return_drop_all_bypass != NULL) {
+ *return_drop_all_bypass = drop_all_bypass;
+ }
+ }
+ if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) {
+ break;
+ }
+ }
+ if (necp_drop_dest_policy.entry_count != 0 &&
+ necp_address_matches_drop_dest_policy(&info->remote_addr, policy_search_array[i]->session_order)) {
+ // We've hit a drop by destination address rule
+ *return_drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_DROP;
+ break;
+ }
+ if (info->drop_order != 0 && policy_search_array[i]->session_order >= info->drop_order) {
+ // We've hit a drop order for this socket
break;
}
if (skip_session_order && policy_search_array[i]->session_order >= skip_session_order) {
// Skip this policy
continue;
}
- if (necp_socket_check_policy(policy_search_array[i], info->application_id, info->real_application_id, info->cred_result, info->account_id, domain_substring, domain_dot_count, info->pid, info->uid, info->bound_interface_index, info->traffic_class, info->protocol, &info->local_addr, &info->remote_addr)) {
+
+ if (necp_socket_check_policy(policy_search_array[i], info->application_id, info->real_application_id, info->cred_result, info->account_id, domain_substring, domain_dot_count, info->pid, info->uid, info->bound_interface_index, info->traffic_class, info->protocol, &info->local_addr, &info->remote_addr, required_agent_types, num_required_agent_types, info->has_client, info->client_flags, info->is_platform_binary, proc, pf_tag, rt, info->is_loopback)) {
if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_SOCKET_FILTER) {
- if (return_filter && *return_filter == 0) {
- *return_filter = policy_search_array[i]->result_parameter.filter_control_unit;
+ if (return_filter && *return_filter != NECP_FILTER_UNIT_NO_FILTER) {
+ necp_kernel_policy_filter control_unit = policy_search_array[i]->result_parameter.filter_control_unit;
+ if (control_unit == NECP_FILTER_UNIT_NO_FILTER) {
+ *return_filter = control_unit;
+ } else {
+ *return_filter |= control_unit;
+ }
if (necp_debug > 1) {
NECPLOG(LOG_DEBUG, "Socket Policy: (Application %d Real Application %d BoundInterface %d Proto %d) Filter %d", info->application_id, info->real_application_id, info->bound_interface_index, info->protocol, policy_search_array[i]->result_parameter.filter_control_unit);
}
}
continue;
} else if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_ROUTE_RULES) {
- if (return_route_rule_id && route_rule_id_count < MAX_AGGREGATE_ROUTE_RULES) {
- route_rule_id_array[route_rule_id_count++] = policy_search_array[i]->result_parameter.route_rule_id;
+ if (return_route_rule_id_array && route_rule_id_count < route_rule_id_array_count) {
+ return_route_rule_id_array[route_rule_id_count++] = policy_search_array[i]->result_parameter.route_rule_id;
if (necp_debug > 1) {
NECPLOG(LOG_DEBUG, "Socket Policy: (Application %d Real Application %d BoundInterface %d Proto %d) Route Rule %d", info->application_id, info->real_application_id, info->bound_interface_index, info->protocol, policy_search_array[i]->result_parameter.route_rule_id);
}
}
}
continue;
- } else if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_USE_NETAGENT) {
+ } else if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_USE_NETAGENT ||
+ policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_NETAGENT_SCOPED) {
if (return_netagent_array != NULL &&
- netagent_cursor < netagent_array_count) {
+ netagent_cursor < netagent_array_count) {
return_netagent_array[netagent_cursor] = policy_search_array[i]->result_parameter.netagent_id;
+ if (return_netagent_use_flags_array != NULL &&
+ policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_NETAGENT_SCOPED) {
+ return_netagent_use_flags_array[netagent_cursor] |= NECP_AGENT_USE_FLAG_SCOPE;
+ }
netagent_cursor++;
if (necp_debug > 1) {
- NECPLOG(LOG_DEBUG, "Socket Policy: (Application %d Real Application %d BoundInterface %d Proto %d) Use Netagent %d", info->application_id, info->real_application_id, info->bound_interface_index, info->protocol, policy_search_array[i]->result_parameter.netagent_id);
+ NECPLOG(LOG_DEBUG, "Socket Policy: (Application %d Real Application %d BoundInterface %d Proto %d) %s Netagent %d",
+ info->application_id, info->real_application_id, info->bound_interface_index, info->protocol,
+ policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_USE_NETAGENT ? "Use" : "Scope",
+ policy_search_array[i]->result_parameter.netagent_id);
}
}
continue;
+ } else if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT) {
+ u_int32_t control_unit = policy_search_array[i]->result_parameter.flow_divert_control_unit;
+ if (control_unit & FLOW_DIVERT_IS_TRANSPARENT) {
+ /* For transparent proxies, accumulate the control unit and continue to the next policy */
+ if (return_flow_divert_aggregate_unit != NULL) {
+ *return_flow_divert_aggregate_unit |= (control_unit & ~FLOW_DIVERT_IS_TRANSPARENT);
+ if (necp_debug > 1) {
+ NECPLOG(LOG_DEBUG, "Socket Policy: (Application %d Real Application %d BoundInterface %d Proto %d) flow divert %u", info->application_id, info->real_application_id, info->bound_interface_index, info->protocol, control_unit);
+ }
+ }
+ continue;
+ }
}
- // Passed all tests, found a match
- matched_policy = policy_search_array[i];
+ // Matched policy is a skip. Do skip and continue.
if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_SKIP) {
skip_order = policy_search_array[i]->result_parameter.skip_policy_order;
skip_session_order = policy_search_array[i]->session_order + 1;
+ if (skip_policy_id && *skip_policy_id == NECP_KERNEL_POLICY_ID_NONE) {
+ *skip_policy_id = policy_search_array[i]->id;
+ }
continue;
}
+
+ // Matched an allow unentitled, which clears any drop order
+ if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_ALLOW_UNENTITLED) {
+ info->drop_order = 0;
+ continue;
+ }
+
+ // Passed all tests, found a match
+ matched_policy = policy_search_array[i];
break;
}
}
}
- if (route_rule_id_count == 1) {
- *return_route_rule_id = route_rule_id_array[0];
- } else if (route_rule_id_count > 1) {
- *return_route_rule_id = necp_create_aggregate_route_rule(route_rule_id_array);
+ if (return_route_rule_id_array_count != NULL) {
+ *return_route_rule_id_array_count = route_rule_id_count;
}
- return (matched_policy);
+ return matched_policy;
}
static bool
int i;
int family = AF_INET;
ifnet_t interface = ifindex2ifnet[interface_index];
-
+
if (inp == NULL || interface == NULL) {
- return (FALSE);
+ return FALSE;
}
-
+
if (inp->inp_vflag & INP_IPV4) {
family = AF_INET;
} else if (inp->inp_vflag & INP_IPV6) {
family = AF_INET6;
}
-
+
result = ifnet_get_address_list_family(interface, &addresses, family);
if (result != 0) {
NECPLOG(LOG_ERR, "Failed to get address list for %s%d", ifnet_name(interface), ifnet_unit(interface));
- return (FALSE);
+ return FALSE;
}
-
+
for (i = 0; addresses[i] != NULL; i++) {
if (ifaddr_address(addresses[i], &address_storage.sa, sizeof(address_storage)) == 0) {
if (family == AF_INET) {
}
}
}
-
+
done:
ifnet_free_address_list(addresses);
addresses = NULL;
- return (found_match);
+ return found_match;
}
static inline bool
necp_socket_is_connected(struct inpcb *inp)
{
- return (inp->inp_socket->so_state & (SS_ISCONNECTING | SS_ISCONNECTED | SS_ISDISCONNECTING));
+ return inp->inp_socket->so_state & (SS_ISCONNECTING | SS_ISCONNECTED | SS_ISDISCONNECTING);
+}
+
+static inline necp_socket_bypass_type_t
+necp_socket_bypass(struct sockaddr *override_local_addr, struct sockaddr *override_remote_addr, struct inpcb *inp)
+{
+ if (necp_pass_loopback > 0 && necp_is_loopback(override_local_addr, override_remote_addr, inp, NULL, IFSCOPE_NONE)) {
+ return NECP_BYPASS_TYPE_LOOPBACK;
+ } else if (necp_is_intcoproc(inp, NULL)) {
+ return NECP_BYPASS_TYPE_INTCOPROC;
+ }
+
+ return NECP_BYPASS_TYPE_NONE;
+}
+
+static inline void
+necp_socket_ip_tunnel_tso(struct inpcb *inp)
+{
+ u_int tunnel_interface_index = inp->inp_policyresult.results.result_parameter.tunnel_interface_index;
+ ifnet_t tunnel_interface = NULL;
+
+ ifnet_head_lock_shared();
+ tunnel_interface = ifindex2ifnet[tunnel_interface_index];
+ ifnet_head_done();
+
+ if (tunnel_interface != NULL) {
+ tcp_set_tso(intotcpcb(inp), tunnel_interface);
+ }
}
necp_kernel_policy_id
{
struct socket *so = NULL;
necp_kernel_policy_filter filter_control_unit = 0;
- u_int32_t route_rule_id = 0;
struct necp_kernel_socket_policy *matched_policy = NULL;
necp_kernel_policy_id matched_policy_id = NECP_KERNEL_POLICY_ID_NONE;
necp_kernel_policy_result service_action = 0;
necp_kernel_policy_service service = { 0, 0 };
+ u_int32_t drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE;
+ necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE;
+ proc_t socket_proc = NULL;
+ necp_socket_bypass_type_t bypass_type = NECP_BYPASS_TYPE_NONE;
u_int32_t netagent_ids[NECP_MAX_NETAGENTS];
memset(&netagent_ids, 0, sizeof(netagent_ids));
struct necp_socket_info info;
+ u_int32_t flow_divert_aggregate_unit = 0;
+
if (inp == NULL) {
- return (NECP_KERNEL_POLICY_ID_NONE);
+ return NECP_KERNEL_POLICY_ID_NONE;
+ }
+
+ // Ignore invalid addresses
+ if (override_local_addr != NULL &&
+ !necp_address_is_valid(override_local_addr)) {
+ override_local_addr = NULL;
+ }
+ if (override_remote_addr != NULL &&
+ !necp_address_is_valid(override_remote_addr)) {
+ override_remote_addr = NULL;
}
so = inp->inp_socket;
+ u_int32_t drop_order = necp_process_drop_order(so->so_cred);
+
// Don't lock. Possible race condition, but we don't want the performance hit.
if (necp_kernel_socket_policies_count == 0 ||
- (!(inp->inp_flags2 & INP2_WANT_APP_POLICY) && necp_kernel_socket_policies_non_app_count == 0)) {
- if (necp_drop_all_order > 0) {
+ (!(inp->inp_flags2 & INP2_WANT_APP_POLICY) && necp_kernel_socket_policies_non_app_count == 0)) {
+ if (necp_drop_all_order > 0 || drop_order > 0) {
inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
inp->inp_policyresult.policy_gencount = 0;
+ inp->inp_policyresult.app_id = 0;
inp->inp_policyresult.flowhash = 0;
inp->inp_policyresult.results.filter_control_unit = 0;
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = 0;
inp->inp_policyresult.results.route_rule_id = 0;
- if (necp_pass_loopback > 0 &&
- necp_is_loopback(override_local_addr, override_remote_addr, inp, NULL)) {
+ if (necp_socket_bypass(override_local_addr, override_remote_addr, inp) != NECP_BYPASS_TYPE_NONE) {
inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_PASS;
} else {
inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_DROP;
}
}
- return (NECP_KERNEL_POLICY_ID_NONE);
+ return NECP_KERNEL_POLICY_ID_NONE;
}
-
+
// Check for loopback exception
- if (necp_pass_loopback > 0 &&
- necp_is_loopback(override_local_addr, override_remote_addr, inp, NULL)) {
+ bypass_type = necp_socket_bypass(override_local_addr, override_remote_addr, inp);
+ if (bypass_type == NECP_BYPASS_TYPE_INTCOPROC || (bypass_type == NECP_BYPASS_TYPE_LOOPBACK && necp_pass_loopback == NECP_LOOPBACK_PASS_ALL)) {
+ if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED) {
+ // If the previous policy result was "socket scoped", un-scope the socket.
+ inp->inp_flags &= ~INP_BOUND_IF;
+ inp->inp_boundifp = NULL;
+ }
// Mark socket as a pass
inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
inp->inp_policyresult.policy_gencount = 0;
+ inp->inp_policyresult.app_id = 0;
inp->inp_policyresult.flowhash = 0;
inp->inp_policyresult.results.filter_control_unit = 0;
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = 0;
inp->inp_policyresult.results.route_rule_id = 0;
inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_PASS;
- return (NECP_KERNEL_POLICY_ID_NONE);
+ return NECP_KERNEL_POLICY_ID_NONE;
}
// Lock
lck_rw_lock_shared(&necp_kernel_policy_lock);
-
- necp_socket_fillout_info_locked(inp, override_local_addr, override_remote_addr, override_bound_interface, &info);
+ necp_socket_fillout_info_locked(inp, override_local_addr, override_remote_addr, override_bound_interface, drop_order, &socket_proc, &info, (bypass_type == NECP_BYPASS_TYPE_LOOPBACK));
// Check info
u_int32_t flowhash = necp_socket_calc_flowhash_locked(&info);
if (inp->inp_policyresult.policy_id != NECP_KERNEL_POLICY_ID_NONE &&
- inp->inp_policyresult.policy_gencount == necp_kernel_socket_policies_gencount &&
- inp->inp_policyresult.flowhash == flowhash) {
+ inp->inp_policyresult.policy_gencount == necp_kernel_socket_policies_gencount &&
+ inp->inp_policyresult.flowhash == flowhash) {
// If already matched this socket on this generation of table, skip
// Unlock
lck_rw_done(&necp_kernel_policy_lock);
- return (inp->inp_policyresult.policy_id);
+ if (socket_proc) {
+ proc_rele(socket_proc);
+ }
+
+ return inp->inp_policyresult.policy_id;
}
+ inp->inp_policyresult.app_id = info.application_id;
+
// Match socket to policy
- matched_policy = necp_socket_find_policy_match_with_info_locked(necp_kernel_socket_policies_map[NECP_SOCKET_MAP_APP_ID_TO_BUCKET(info.application_id)], &info, &filter_control_unit, &route_rule_id, &service_action, &service, netagent_ids, NECP_MAX_NETAGENTS);
+ necp_kernel_policy_id skip_policy_id = NECP_KERNEL_POLICY_ID_NONE;
+ u_int32_t route_rule_id_array[MAX_AGGREGATE_ROUTE_RULES];
+ size_t route_rule_id_array_count = 0;
+ matched_policy = necp_socket_find_policy_match_with_info_locked(necp_kernel_socket_policies_map[NECP_SOCKET_MAP_APP_ID_TO_BUCKET(info.application_id)], &info, &filter_control_unit, route_rule_id_array, &route_rule_id_array_count, MAX_AGGREGATE_ROUTE_RULES, &service_action, &service, netagent_ids, NULL, NECP_MAX_NETAGENTS, NULL, 0, socket_proc ? socket_proc : current_proc(), 0, &skip_policy_id, inp->inp_route.ro_rt, &drop_dest_policy_result, &drop_all_bypass, &flow_divert_aggregate_unit);
+
+ // Check for loopback exception again after the policy match
+ if (bypass_type == NECP_BYPASS_TYPE_LOOPBACK &&
+ necp_pass_loopback == NECP_LOOPBACK_PASS_WITH_FILTER &&
+ (matched_policy == NULL || matched_policy->result != NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT)) {
+ if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED) {
+ // If the previous policy result was "socket scoped", un-scope the socket.
+ inp->inp_flags &= ~INP_BOUND_IF;
+ inp->inp_boundifp = NULL;
+ }
+ // Mark socket as a pass
+ inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ inp->inp_policyresult.policy_gencount = 0;
+ inp->inp_policyresult.app_id = 0;
+ inp->inp_policyresult.flowhash = 0;
+ inp->inp_policyresult.results.filter_control_unit = filter_control_unit;
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit;
+ inp->inp_policyresult.results.route_rule_id = 0;
+ inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_PASS;
+
+ // Unlock
+ lck_rw_done(&necp_kernel_policy_lock);
+
+ if (socket_proc) {
+ proc_rele(socket_proc);
+ }
+
+ return NECP_KERNEL_POLICY_ID_NONE;
+ }
+
// If the socket matched a scoped service policy, mark as Drop if not registered.
// This covers the cases in which a service is required (on demand) but hasn't started yet.
if ((service_action == NECP_KERNEL_POLICY_RESULT_TRIGGER_SCOPED ||
- service_action == NECP_KERNEL_POLICY_RESULT_NO_TRIGGER_SCOPED) &&
- service.identifier != 0 &&
- service.identifier != NECP_NULL_SERVICE_ID) {
+ service_action == NECP_KERNEL_POLICY_RESULT_NO_TRIGGER_SCOPED) &&
+ service.identifier != 0 &&
+ service.identifier != NECP_NULL_SERVICE_ID) {
bool service_is_registered = FALSE;
struct necp_service_registration *service_registration = NULL;
LIST_FOREACH(service_registration, &necp_registered_service_list, kernel_chain) {
if (!service_is_registered) {
// Mark socket as a drop if service is not registered
inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount;
inp->inp_policyresult.flowhash = flowhash;
inp->inp_policyresult.results.filter_control_unit = 0;
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = 0;
inp->inp_policyresult.results.route_rule_id = 0;
inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_DROP;
// Unlock
lck_rw_done(&necp_kernel_policy_lock);
- return (NECP_KERNEL_POLICY_ID_NONE);
+
+ if (socket_proc) {
+ proc_rele(socket_proc);
+ }
+
+ return NECP_KERNEL_POLICY_ID_NONE;
}
}
// Verify netagents
// Mark socket as a drop if required agent is not active
inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount;
inp->inp_policyresult.flowhash = flowhash;
inp->inp_policyresult.results.filter_control_unit = 0;
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = 0;
inp->inp_policyresult.results.route_rule_id = 0;
inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_DROP;
// Unlock
lck_rw_done(&necp_kernel_policy_lock);
- return (NECP_KERNEL_POLICY_ID_NONE);
+
+ if (socket_proc) {
+ proc_rele(socket_proc);
+ }
+
+ return NECP_KERNEL_POLICY_ID_NONE;
}
}
}
}
+
+ u_int32_t route_rule_id = 0;
+ if (route_rule_id_array_count == 1) {
+ route_rule_id = route_rule_id_array[0];
+ } else if (route_rule_id_array_count > 1) {
+ route_rule_id = necp_create_aggregate_route_rule(route_rule_id_array);
+ }
+
+ bool reset_tcp_tunnel_interface = false;
+ bool send_local_network_denied_event = false;
if (matched_policy) {
matched_policy_id = matched_policy->id;
inp->inp_policyresult.policy_id = matched_policy->id;
+ inp->inp_policyresult.skip_policy_id = skip_policy_id;
inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount;
inp->inp_policyresult.flowhash = flowhash;
inp->inp_policyresult.results.filter_control_unit = filter_control_unit;
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit;
inp->inp_policyresult.results.route_rule_id = route_rule_id;
inp->inp_policyresult.results.result = matched_policy->result;
memcpy(&inp->inp_policyresult.results.result_parameter, &matched_policy->result_parameter, sizeof(matched_policy->result_parameter));
+ if (info.used_responsible_pid && (matched_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID)) {
+ inp->inp_policyresult.app_id = info.real_application_id;
+ }
+
if (necp_socket_is_connected(inp) &&
- (matched_policy->result == NECP_KERNEL_POLICY_RESULT_DROP ||
- (matched_policy->result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && !necp_socket_uses_interface(inp, matched_policy->result_parameter.tunnel_interface_index)))) {
+ (matched_policy->result == NECP_KERNEL_POLICY_RESULT_DROP ||
+ (matched_policy->result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && !necp_socket_uses_interface(inp, matched_policy->result_parameter.tunnel_interface_index)))) {
if (necp_debug) {
NECPLOG(LOG_DEBUG, "Marking socket in state %d as defunct", so->so_state);
}
- sosetdefunct(current_proc(), so, SHUTDOWN_SOCKET_LEVEL_DISCONNECT_ALL, TRUE);
+ sosetdefunct(current_proc(), so, SHUTDOWN_SOCKET_LEVEL_NECP | SHUTDOWN_SOCKET_LEVEL_DISCONNECT_ALL, TRUE);
} else if (necp_socket_is_connected(inp) &&
- matched_policy->result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL &&
- info.protocol == IPPROTO_TCP) {
- // Reset MSS on TCP socket if tunnel policy changes
- tcp_mtudisc(inp, 0);
+ matched_policy->result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL &&
+ info.protocol == IPPROTO_TCP) {
+ // Reset TCP socket interface based parameters if tunnel policy changes
+ reset_tcp_tunnel_interface = true;
+ }
+
+ if (necp_debug > 1) {
+ NECPLOG(LOG_DEBUG, "Socket Policy: %p (BoundInterface %d Proto %d) Policy %d Result %d Parameter %d", inp->inp_socket, info.bound_interface_index, info.protocol, matched_policy->id, matched_policy->result, matched_policy->result_parameter.tunnel_interface_index);
+ }
+
+ if (matched_policy->result == NECP_KERNEL_POLICY_RESULT_DROP &&
+ matched_policy->result_parameter.drop_flags & NECP_KERNEL_POLICY_DROP_FLAG_LOCAL_NETWORK) {
+ // Trigger the event that we dropped due to a local network policy
+ send_local_network_denied_event = true;
+ }
+ } else {
+ bool drop_all = false;
+ if (necp_drop_all_order > 0 || info.drop_order > 0 || drop_dest_policy_result == NECP_KERNEL_POLICY_RESULT_DROP) {
+ // Mark socket as a drop if set
+ drop_all = true;
+ if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) {
+ drop_all_bypass = necp_check_drop_all_bypass_result(socket_proc ? socket_proc : current_proc());
+ }
+ }
+ if (drop_all && drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) {
+ inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount;
+ inp->inp_policyresult.flowhash = flowhash;
+ inp->inp_policyresult.results.filter_control_unit = 0;
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = 0;
+ inp->inp_policyresult.results.route_rule_id = 0;
+ inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_DROP;
+ } else {
+ // Mark non-matching socket so we don't re-check it
+ inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount;
+ inp->inp_policyresult.flowhash = flowhash;
+ inp->inp_policyresult.results.filter_control_unit = filter_control_unit; // We may have matched a filter, so mark it!
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit;
+ inp->inp_policyresult.results.route_rule_id = route_rule_id; // We may have matched a route rule, so mark it!
+ inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_NONE;
}
+ }
- if (necp_debug > 1) {
- NECPLOG(LOG_DEBUG, "Socket Policy: %p (BoundInterface %d Proto %d) Policy %d Result %d Parameter %d", inp->inp_socket, info.bound_interface_index, info.protocol, matched_policy->id, matched_policy->result, matched_policy->result_parameter.tunnel_interface_index);
- }
- } else if (necp_drop_all_order > 0) {
- // Mark socket as a drop if set
+ if (necp_check_missing_client_drop(socket_proc ? socket_proc : current_proc(), &info) ||
+ necp_check_restricted_multicast_drop(socket_proc ? socket_proc : current_proc(), &info, false)) {
+ // Mark as drop
inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount;
inp->inp_policyresult.flowhash = flowhash;
inp->inp_policyresult.results.filter_control_unit = 0;
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = 0;
inp->inp_policyresult.results.route_rule_id = 0;
inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_DROP;
- } else {
- // Mark non-matching socket so we don't re-check it
- inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
- inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount;
- inp->inp_policyresult.flowhash = flowhash;
- inp->inp_policyresult.results.filter_control_unit = filter_control_unit; // We may have matched a filter, so mark it!
- inp->inp_policyresult.results.route_rule_id = route_rule_id; // We may have matched a route rule, so mark it!
- inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_NONE;
}
// Unlock
lck_rw_done(&necp_kernel_policy_lock);
- return (matched_policy_id);
+ if (reset_tcp_tunnel_interface) {
+ // Update MSS when not holding the policy lock to avoid recursive locking
+ tcp_mtudisc(inp, 0);
+
+ // Update TSO flag based on the tunnel interface
+ necp_socket_ip_tunnel_tso(inp);
+ }
+
+ if (send_local_network_denied_event) {
+ necp_send_network_denied_event(((so->so_flags & SOF_DELEGATED) ? so->e_pid : so->last_pid),
+ ((so->so_flags & SOF_DELEGATED) ? so->e_uuid : so->last_uuid),
+ NETPOLICY_NETWORKTYPE_LOCAL);
+ }
+
+ if (socket_proc) {
+ proc_rele(socket_proc);
+ }
+
+ return matched_policy_id;
}
static bool
-necp_ip_output_check_policy(struct necp_kernel_ip_output_policy *kernel_policy, necp_kernel_policy_id socket_policy_id, u_int32_t bound_interface_index, u_int32_t last_interface_index, u_int16_t protocol, union necp_sockaddr_union *local, union necp_sockaddr_union *remote)
+necp_ip_output_check_policy(struct necp_kernel_ip_output_policy *kernel_policy, necp_kernel_policy_id socket_policy_id, necp_kernel_policy_id socket_skip_policy_id, u_int32_t bound_interface_index, u_int32_t last_interface_index, u_int16_t protocol, union necp_sockaddr_union *local, union necp_sockaddr_union *remote, struct rtentry *rt, u_int16_t pf_tag)
{
if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES)) {
if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) {
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) {
if (bound_interface_index == cond_bound_interface_index) {
// No match, matches forbidden interface
- return (FALSE);
+ return FALSE;
}
} else {
if (bound_interface_index != cond_bound_interface_index) {
// No match, does not match required interface
- return (FALSE);
+ return FALSE;
}
}
} else {
if (bound_interface_index != 0) {
// No match, requires a non-bound packet
- return (FALSE);
+ return FALSE;
}
}
}
if (kernel_policy->condition_mask == 0) {
- return (TRUE);
+ return TRUE;
}
if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID) {
- if (socket_policy_id != kernel_policy->cond_policy_id) {
+ necp_kernel_policy_id matched_policy_id =
+ kernel_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP ? socket_skip_policy_id : socket_policy_id;
+ if (matched_policy_id != kernel_policy->cond_policy_id) {
// No match, does not match required id
- return (FALSE);
+ return FALSE;
}
}
if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LAST_INTERFACE) {
if (last_interface_index != kernel_policy->cond_last_interface_index) {
- return (FALSE);
+ return FALSE;
}
}
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PROTOCOL) {
if (protocol == kernel_policy->cond_protocol) {
// No match, matches forbidden protocol
- return (FALSE);
+ return FALSE;
}
} else {
if (protocol != kernel_policy->cond_protocol) {
// No match, does not match required protocol
- return (FALSE);
+ return FALSE;
}
}
}
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) {
+ bool is_local = FALSE;
+
+ if (rt != NULL) {
+ is_local = IS_NECP_DEST_IN_LOCAL_NETWORKS(rt);
+ } else {
+ is_local = necp_is_route_local(remote);
+ }
+
+ if (!is_local) {
+ // Either no route to validate or no match for local networks
+ return FALSE;
+ }
+ }
+
if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) {
if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) {
bool inRange = necp_is_addr_in_range((struct sockaddr *)local, (struct sockaddr *)&kernel_policy->cond_local_start, (struct sockaddr *)&kernel_policy->cond_local_end);
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_END) {
if (inRange) {
- return (FALSE);
+ return FALSE;
}
} else {
if (!inRange) {
- return (FALSE);
+ return FALSE;
}
}
} else if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) {
bool inSubnet = necp_is_addr_in_subnet((struct sockaddr *)local, (struct sockaddr *)&kernel_policy->cond_local_start, kernel_policy->cond_local_prefix);
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) {
if (inSubnet) {
- return (FALSE);
+ return FALSE;
}
} else {
if (!inSubnet) {
- return (FALSE);
+ return FALSE;
}
}
}
bool inRange = necp_is_addr_in_range((struct sockaddr *)remote, (struct sockaddr *)&kernel_policy->cond_remote_start, (struct sockaddr *)&kernel_policy->cond_remote_end);
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_END) {
if (inRange) {
- return (FALSE);
+ return FALSE;
}
} else {
if (!inRange) {
- return (FALSE);
+ return FALSE;
}
}
} else if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) {
bool inSubnet = necp_is_addr_in_subnet((struct sockaddr *)remote, (struct sockaddr *)&kernel_policy->cond_remote_start, kernel_policy->cond_remote_prefix);
if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) {
if (inSubnet) {
- return (FALSE);
+ return FALSE;
}
} else {
if (!inSubnet) {
- return (FALSE);
+ return FALSE;
+ }
+ }
+ }
+ }
+
+ if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) {
+ bool tags_matched = false;
+
+ if (kernel_policy->cond_packet_filter_tags & NECP_POLICY_CONDITION_PACKET_FILTER_TAG_STACK_DROP) {
+ if ((pf_tag & PF_TAG_ID_STACK_DROP) == PF_TAG_ID_STACK_DROP) {
+ tags_matched = true;
+ }
+
+ if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) {
+ if (tags_matched) {
+ return FALSE;
+ }
+ } else {
+ if (!tags_matched) {
+ return FALSE;
}
}
}
}
- return (TRUE);
+ return TRUE;
}
static inline struct necp_kernel_ip_output_policy *
-necp_ip_output_find_policy_match_locked(necp_kernel_policy_id socket_policy_id, u_int32_t bound_interface_index, u_int32_t last_interface_index, u_int16_t protocol, union necp_sockaddr_union *local_addr, union necp_sockaddr_union *remote_addr)
+necp_ip_output_find_policy_match_locked(necp_kernel_policy_id socket_policy_id, necp_kernel_policy_id socket_skip_policy_id, u_int32_t bound_interface_index, u_int32_t last_interface_index, u_int16_t protocol, union necp_sockaddr_union *local_addr, union necp_sockaddr_union *remote_addr, struct rtentry *rt, u_int16_t pf_tag, u_int32_t *return_route_rule_id, necp_kernel_policy_result *return_drop_dest_policy_result, necp_drop_all_bypass_check_result_t *return_drop_all_bypass)
{
u_int32_t skip_order = 0;
u_int32_t skip_session_order = 0;
- int i;
struct necp_kernel_ip_output_policy *matched_policy = NULL;
struct necp_kernel_ip_output_policy **policy_search_array = necp_kernel_ip_output_policies_map[NECP_IP_OUTPUT_MAP_ID_TO_BUCKET(socket_policy_id)];
+ u_int32_t route_rule_id_array[MAX_AGGREGATE_ROUTE_RULES];
+ size_t route_rule_id_count = 0;
+ necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE;
+ if (return_drop_all_bypass != NULL) {
+ *return_drop_all_bypass = drop_all_bypass;
+ }
+
+ if (return_route_rule_id != NULL) {
+ *return_route_rule_id = 0;
+ }
+
+ *return_drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE;
+
if (policy_search_array != NULL) {
- for (i = 0; policy_search_array[i] != NULL; i++) {
+ for (int i = 0; policy_search_array[i] != NULL; i++) {
if (necp_drop_all_order != 0 && policy_search_array[i]->session_order >= necp_drop_all_order) {
// We've hit a drop all rule
+ if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) {
+ drop_all_bypass = necp_check_drop_all_bypass_result(NULL);
+ if (return_drop_all_bypass != NULL) {
+ *return_drop_all_bypass = drop_all_bypass;
+ }
+ }
+ if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) {
+ break;
+ }
+ }
+ if (necp_drop_dest_policy.entry_count > 0 &&
+ necp_address_matches_drop_dest_policy(remote_addr, policy_search_array[i]->session_order)) {
+ // We've hit a drop by destination address rule
+ *return_drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_DROP;
break;
}
if (skip_session_order && policy_search_array[i]->session_order >= skip_session_order) {
// Skip this policy
continue;
}
- if (necp_ip_output_check_policy(policy_search_array[i], socket_policy_id, bound_interface_index, last_interface_index, protocol, local_addr, remote_addr)) {
- // Passed all tests, found a match
- matched_policy = policy_search_array[i];
- if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_SKIP) {
+ if (necp_ip_output_check_policy(policy_search_array[i], socket_policy_id, socket_skip_policy_id, bound_interface_index, last_interface_index, protocol, local_addr, remote_addr, rt, pf_tag)) {
+ if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_ROUTE_RULES) {
+ if (return_route_rule_id != NULL && route_rule_id_count < MAX_AGGREGATE_ROUTE_RULES) {
+ route_rule_id_array[route_rule_id_count++] = policy_search_array[i]->result_parameter.route_rule_id;
+ }
+ continue;
+ } else if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_SKIP) {
skip_order = policy_search_array[i]->result_parameter.skip_policy_order;
skip_session_order = policy_search_array[i]->session_order + 1;
continue;
}
+ // Passed all tests, found a match
+ matched_policy = policy_search_array[i];
break;
}
}
}
- return (matched_policy);
+ if (route_rule_id_count == 1) {
+ *return_route_rule_id = route_rule_id_array[0];
+ } else if (route_rule_id_count > 1) {
+ *return_route_rule_id = necp_create_aggregate_route_rule(route_rule_id_array);
+ }
+
+ return matched_policy;
+}
+
+static inline bool
+necp_output_bypass(struct mbuf *packet)
+{
+ if (necp_pass_loopback > 0 && necp_is_loopback(NULL, NULL, NULL, packet, IFSCOPE_NONE)) {
+ return true;
+ }
+ if (necp_pass_keepalives > 0 && necp_get_is_keepalive_from_packet(packet)) {
+ return true;
+ }
+ if (necp_is_intcoproc(NULL, packet)) {
+ return true;
+ }
+ return false;
}
necp_kernel_policy_id
-necp_ip_output_find_policy_match(struct mbuf *packet, int flags, struct ip_out_args *ipoa, necp_kernel_policy_result *result, necp_kernel_policy_result_parameter *result_parameter)
+necp_ip_output_find_policy_match(struct mbuf *packet, int flags, struct ip_out_args *ipoa, struct rtentry *rt,
+ necp_kernel_policy_result *result, necp_kernel_policy_result_parameter *result_parameter)
{
struct ip *ip = NULL;
int hlen = sizeof(struct ip);
necp_kernel_policy_id socket_policy_id = NECP_KERNEL_POLICY_ID_NONE;
+ necp_kernel_policy_id socket_skip_policy_id = NECP_KERNEL_POLICY_ID_NONE;
necp_kernel_policy_id matched_policy_id = NECP_KERNEL_POLICY_ID_NONE;
struct necp_kernel_ip_output_policy *matched_policy = NULL;
u_int16_t protocol = 0;
u_int32_t last_interface_index = 0;
union necp_sockaddr_union local_addr;
union necp_sockaddr_union remote_addr;
+ u_int32_t drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE;
+ necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE;
+ u_int16_t pf_tag = 0;
if (result) {
*result = 0;
}
if (packet == NULL) {
- return (NECP_KERNEL_POLICY_ID_NONE);
+ return NECP_KERNEL_POLICY_ID_NONE;
}
-
+
socket_policy_id = necp_get_policy_id_from_packet(packet);
+ socket_skip_policy_id = necp_get_skip_policy_id_from_packet(packet);
+ pf_tag = necp_get_packet_filter_tags_from_packet(packet);
// Exit early for an empty list
// Don't lock. Possible race condition, but we don't want the performance hit.
if (necp_kernel_ip_output_policies_count == 0 ||
- ((socket_policy_id == NECP_KERNEL_POLICY_ID_NONE) && necp_kernel_ip_output_policies_non_id_count == 0)) {
+ (socket_policy_id == NECP_KERNEL_POLICY_ID_NONE && necp_kernel_ip_output_policies_non_id_count == 0 && necp_drop_dest_policy.entry_count == 0)) {
if (necp_drop_all_order > 0) {
matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
if (result) {
- if ((necp_pass_loopback > 0 &&
- necp_is_loopback(NULL, NULL, NULL, packet)) ||
- (necp_pass_keepalives > 0 &&
- necp_get_is_keepalive_from_packet(packet))) {
+ if (necp_output_bypass(packet)) {
*result = NECP_KERNEL_POLICY_RESULT_PASS;
} else {
*result = NECP_KERNEL_POLICY_RESULT_DROP;
}
}
- return (matched_policy_id);
+ return matched_policy_id;
}
-
+
// Check for loopback exception
- if ((necp_pass_loopback > 0 &&
- necp_is_loopback(NULL, NULL, NULL, packet)) ||
- (necp_pass_keepalives > 0 &&
- necp_get_is_keepalive_from_packet(packet))) {
+ if (necp_output_bypass(packet)) {
matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
if (result) {
*result = NECP_KERNEL_POLICY_RESULT_PASS;
}
- return (matched_policy_id);
+ return matched_policy_id;
}
-
+
last_interface_index = necp_get_last_interface_index_from_packet(packet);
// Process packet to get relevant fields
protocol = ip->ip_p;
if ((flags & IP_OUTARGS) && (ipoa != NULL) &&
- (ipoa->ipoa_flags & IPOAF_BOUND_IF) &&
- ipoa->ipoa_boundif != IFSCOPE_NONE) {
+ (ipoa->ipoa_flags & IPOAF_BOUND_IF) &&
+ ipoa->ipoa_boundif != IFSCOPE_NONE) {
bound_interface_index = ipoa->ipoa_boundif;
}
memcpy(&((struct sockaddr_in *)&remote_addr)->sin_addr, &ip->ip_dst, sizeof(ip->ip_dst));
switch (protocol) {
- case IPPROTO_TCP: {
- struct tcphdr th;
- if ((int)(hlen + sizeof(th)) <= packet->m_pkthdr.len) {
- m_copydata(packet, hlen, sizeof(th), (u_int8_t *)&th);
- ((struct sockaddr_in *)&local_addr)->sin_port = th.th_sport;
- ((struct sockaddr_in *)&remote_addr)->sin_port = th.th_dport;
- }
- break;
- }
- case IPPROTO_UDP: {
- struct udphdr uh;
- if ((int)(hlen + sizeof(uh)) <= packet->m_pkthdr.len) {
- m_copydata(packet, hlen, sizeof(uh), (u_int8_t *)&uh);
- ((struct sockaddr_in *)&local_addr)->sin_port = uh.uh_sport;
- ((struct sockaddr_in *)&remote_addr)->sin_port = uh.uh_dport;
- }
- break;
+ case IPPROTO_TCP: {
+ struct tcphdr th;
+ if ((int)(hlen + sizeof(th)) <= packet->m_pkthdr.len) {
+ m_copydata(packet, hlen, sizeof(th), (u_int8_t *)&th);
+ ((struct sockaddr_in *)&local_addr)->sin_port = th.th_sport;
+ ((struct sockaddr_in *)&remote_addr)->sin_port = th.th_dport;
}
- default: {
- ((struct sockaddr_in *)&local_addr)->sin_port = 0;
- ((struct sockaddr_in *)&remote_addr)->sin_port = 0;
- break;
+ break;
+ }
+ case IPPROTO_UDP: {
+ struct udphdr uh;
+ if ((int)(hlen + sizeof(uh)) <= packet->m_pkthdr.len) {
+ m_copydata(packet, hlen, sizeof(uh), (u_int8_t *)&uh);
+ ((struct sockaddr_in *)&local_addr)->sin_port = uh.uh_sport;
+ ((struct sockaddr_in *)&remote_addr)->sin_port = uh.uh_dport;
}
+ break;
+ }
+ default: {
+ ((struct sockaddr_in *)&local_addr)->sin_port = 0;
+ ((struct sockaddr_in *)&remote_addr)->sin_port = 0;
+ break;
+ }
}
// Match packet to policy
lck_rw_lock_shared(&necp_kernel_policy_lock);
- matched_policy = necp_ip_output_find_policy_match_locked(socket_policy_id, bound_interface_index, last_interface_index, protocol, &local_addr, &remote_addr);
+ u_int32_t route_rule_id = 0;
+ matched_policy = necp_ip_output_find_policy_match_locked(socket_policy_id, socket_skip_policy_id, bound_interface_index, last_interface_index, protocol, &local_addr, &remote_addr, rt, pf_tag, &route_rule_id, &drop_dest_policy_result, &drop_all_bypass);
if (matched_policy) {
matched_policy_id = matched_policy->id;
if (result) {
memcpy(result_parameter, &matched_policy->result_parameter, sizeof(matched_policy->result_parameter));
}
+ if (route_rule_id != 0 &&
+ packet->m_pkthdr.necp_mtag.necp_route_rule_id == 0) {
+ packet->m_pkthdr.necp_mtag.necp_route_rule_id = route_rule_id;
+ }
+
if (necp_debug > 1) {
- NECPLOG(LOG_DEBUG, "IP Output: (ID %d BoundInterface %d LastInterface %d Proto %d) Policy %d Result %d Parameter %d", socket_policy_id, bound_interface_index, last_interface_index, protocol, matched_policy->id, matched_policy->result, matched_policy->result_parameter.tunnel_interface_index);
+ NECPLOG(LOG_DEBUG, "IP Output: (ID %d BoundInterface %d LastInterface %d Proto %d) Policy %d Result %d Parameter %d Route Rule %u", socket_policy_id, bound_interface_index, last_interface_index, protocol, matched_policy->id, matched_policy->result, matched_policy->result_parameter.tunnel_interface_index, route_rule_id);
}
- } else if (necp_drop_all_order > 0) {
- matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
- if (result) {
- *result = NECP_KERNEL_POLICY_RESULT_DROP;
+ } else {
+ bool drop_all = false;
+ /*
+ * Apply drop-all only to packets which have never matched a primary policy (check
+ * if the packet saved policy id is none or falls within the socket policy id range).
+ */
+ if (socket_policy_id < NECP_KERNEL_POLICY_ID_FIRST_VALID_IP &&
+ (necp_drop_all_order > 0 || drop_dest_policy_result == NECP_KERNEL_POLICY_RESULT_DROP)) {
+ drop_all = true;
+ if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) {
+ drop_all_bypass = necp_check_drop_all_bypass_result(NULL);
+ }
+ }
+ if (drop_all && drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) {
+ matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ if (result) {
+ *result = NECP_KERNEL_POLICY_RESULT_DROP;
+ }
+ } else if (route_rule_id != 0 &&
+ packet->m_pkthdr.necp_mtag.necp_route_rule_id == 0) {
+ // If we matched a route rule, mark it
+ packet->m_pkthdr.necp_mtag.necp_route_rule_id = route_rule_id;
}
}
lck_rw_done(&necp_kernel_policy_lock);
- return (matched_policy_id);
+ return matched_policy_id;
}
necp_kernel_policy_id
-necp_ip6_output_find_policy_match(struct mbuf *packet, int flags, struct ip6_out_args *ip6oa, necp_kernel_policy_result *result, necp_kernel_policy_result_parameter *result_parameter)
+necp_ip6_output_find_policy_match(struct mbuf *packet, int flags, struct ip6_out_args *ip6oa, struct rtentry *rt,
+ necp_kernel_policy_result *result, necp_kernel_policy_result_parameter *result_parameter)
{
struct ip6_hdr *ip6 = NULL;
int next = -1;
int offset = 0;
necp_kernel_policy_id socket_policy_id = NECP_KERNEL_POLICY_ID_NONE;
+ necp_kernel_policy_id socket_skip_policy_id = NECP_KERNEL_POLICY_ID_NONE;
necp_kernel_policy_id matched_policy_id = NECP_KERNEL_POLICY_ID_NONE;
struct necp_kernel_ip_output_policy *matched_policy = NULL;
u_int16_t protocol = 0;
u_int32_t last_interface_index = 0;
union necp_sockaddr_union local_addr;
union necp_sockaddr_union remote_addr;
+ u_int32_t drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE;
+ necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE;
+ u_int16_t pf_tag = 0;
if (result) {
*result = 0;
}
if (packet == NULL) {
- return (NECP_KERNEL_POLICY_ID_NONE);
+ return NECP_KERNEL_POLICY_ID_NONE;
}
socket_policy_id = necp_get_policy_id_from_packet(packet);
-
+ socket_skip_policy_id = necp_get_skip_policy_id_from_packet(packet);
+ pf_tag = necp_get_packet_filter_tags_from_packet(packet);
+
// Exit early for an empty list
// Don't lock. Possible race condition, but we don't want the performance hit.
if (necp_kernel_ip_output_policies_count == 0 ||
- ((socket_policy_id == NECP_KERNEL_POLICY_ID_NONE) && necp_kernel_ip_output_policies_non_id_count == 0)) {
+ (socket_policy_id == NECP_KERNEL_POLICY_ID_NONE && necp_kernel_ip_output_policies_non_id_count == 0 && necp_drop_dest_policy.entry_count == 0)) {
if (necp_drop_all_order > 0) {
matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
if (result) {
- if ((necp_pass_loopback > 0 &&
- necp_is_loopback(NULL, NULL, NULL, packet)) ||
- (necp_pass_keepalives > 0 &&
- necp_get_is_keepalive_from_packet(packet))) {
+ if (necp_output_bypass(packet)) {
*result = NECP_KERNEL_POLICY_RESULT_PASS;
} else {
*result = NECP_KERNEL_POLICY_RESULT_DROP;
}
}
- return (matched_policy_id);
+ return matched_policy_id;
}
-
+
// Check for loopback exception
- if ((necp_pass_loopback > 0 &&
- necp_is_loopback(NULL, NULL, NULL, packet)) ||
- (necp_pass_keepalives > 0 &&
- necp_get_is_keepalive_from_packet(packet))) {
+ if (necp_output_bypass(packet)) {
matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
if (result) {
*result = NECP_KERNEL_POLICY_RESULT_PASS;
}
- return (matched_policy_id);
+ return matched_policy_id;
}
-
+
last_interface_index = necp_get_last_interface_index_from_packet(packet);
// Process packet to get relevant fields
ip6 = mtod(packet, struct ip6_hdr *);
if ((flags & IPV6_OUTARGS) && (ip6oa != NULL) &&
- (ip6oa->ip6oa_flags & IP6OAF_BOUND_IF) &&
- ip6oa->ip6oa_boundif != IFSCOPE_NONE) {
+ (ip6oa->ip6oa_flags & IP6OAF_BOUND_IF) &&
+ ip6oa->ip6oa_boundif != IFSCOPE_NONE) {
bound_interface_index = ip6oa->ip6oa_boundif;
}
if (offset >= 0 && packet->m_pkthdr.len >= offset) {
protocol = next;
switch (protocol) {
- case IPPROTO_TCP: {
- struct tcphdr th;
- if ((int)(offset + sizeof(th)) <= packet->m_pkthdr.len) {
- m_copydata(packet, offset, sizeof(th), (u_int8_t *)&th);
- ((struct sockaddr_in6 *)&local_addr)->sin6_port = th.th_sport;
- ((struct sockaddr_in6 *)&remote_addr)->sin6_port = th.th_dport;
- }
- break;
- }
- case IPPROTO_UDP: {
- struct udphdr uh;
- if ((int)(offset + sizeof(uh)) <= packet->m_pkthdr.len) {
- m_copydata(packet, offset, sizeof(uh), (u_int8_t *)&uh);
- ((struct sockaddr_in6 *)&local_addr)->sin6_port = uh.uh_sport;
- ((struct sockaddr_in6 *)&remote_addr)->sin6_port = uh.uh_dport;
- }
- break;
+ case IPPROTO_TCP: {
+ struct tcphdr th;
+ if ((int)(offset + sizeof(th)) <= packet->m_pkthdr.len) {
+ m_copydata(packet, offset, sizeof(th), (u_int8_t *)&th);
+ ((struct sockaddr_in6 *)&local_addr)->sin6_port = th.th_sport;
+ ((struct sockaddr_in6 *)&remote_addr)->sin6_port = th.th_dport;
}
- default: {
- ((struct sockaddr_in6 *)&local_addr)->sin6_port = 0;
- ((struct sockaddr_in6 *)&remote_addr)->sin6_port = 0;
- break;
+ break;
+ }
+ case IPPROTO_UDP: {
+ struct udphdr uh;
+ if ((int)(offset + sizeof(uh)) <= packet->m_pkthdr.len) {
+ m_copydata(packet, offset, sizeof(uh), (u_int8_t *)&uh);
+ ((struct sockaddr_in6 *)&local_addr)->sin6_port = uh.uh_sport;
+ ((struct sockaddr_in6 *)&remote_addr)->sin6_port = uh.uh_dport;
}
+ break;
+ }
+ default: {
+ ((struct sockaddr_in6 *)&local_addr)->sin6_port = 0;
+ ((struct sockaddr_in6 *)&remote_addr)->sin6_port = 0;
+ break;
+ }
}
}
// Match packet to policy
lck_rw_lock_shared(&necp_kernel_policy_lock);
- matched_policy = necp_ip_output_find_policy_match_locked(socket_policy_id, bound_interface_index, last_interface_index, protocol, &local_addr, &remote_addr);
+ u_int32_t route_rule_id = 0;
+ matched_policy = necp_ip_output_find_policy_match_locked(socket_policy_id, socket_skip_policy_id, bound_interface_index, last_interface_index, protocol, &local_addr, &remote_addr, rt, pf_tag, &route_rule_id, &drop_dest_policy_result, &drop_all_bypass);
if (matched_policy) {
matched_policy_id = matched_policy->id;
if (result) {
memcpy(result_parameter, &matched_policy->result_parameter, sizeof(matched_policy->result_parameter));
}
+ if (route_rule_id != 0 &&
+ packet->m_pkthdr.necp_mtag.necp_route_rule_id == 0) {
+ packet->m_pkthdr.necp_mtag.necp_route_rule_id = route_rule_id;
+ }
+
if (necp_debug > 1) {
- NECPLOG(LOG_DEBUG, "IP6 Output: (ID %d BoundInterface %d LastInterface %d Proto %d) Policy %d Result %d Parameter %d", socket_policy_id, bound_interface_index, last_interface_index, protocol, matched_policy->id, matched_policy->result, matched_policy->result_parameter.tunnel_interface_index);
+ NECPLOG(LOG_DEBUG, "IP6 Output: (ID %d BoundInterface %d LastInterface %d Proto %d) Policy %d Result %d Parameter %d Route Rule %u", socket_policy_id, bound_interface_index, last_interface_index, protocol, matched_policy->id, matched_policy->result, matched_policy->result_parameter.tunnel_interface_index, route_rule_id);
}
- } else if (necp_drop_all_order > 0) {
- matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
- if (result) {
- *result = NECP_KERNEL_POLICY_RESULT_DROP;
+ } else {
+ bool drop_all = false;
+ /*
+ * Apply drop-all only to packets which have never matched a primary policy (check
+ * if the packet saved policy id is none or falls within the socket policy id range).
+ */
+ if (socket_policy_id < NECP_KERNEL_POLICY_ID_FIRST_VALID_IP &&
+ (necp_drop_all_order > 0 || drop_dest_policy_result == NECP_KERNEL_POLICY_RESULT_DROP)) {
+ drop_all = true;
+ if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) {
+ drop_all_bypass = necp_check_drop_all_bypass_result(NULL);
+ }
+ }
+ if (drop_all && drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) {
+ matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ if (result) {
+ *result = NECP_KERNEL_POLICY_RESULT_DROP;
+ }
+ } else if (route_rule_id != 0 &&
+ packet->m_pkthdr.necp_mtag.necp_route_rule_id == 0) {
+ // If we matched a route rule, mark it
+ packet->m_pkthdr.necp_mtag.necp_route_rule_id = route_rule_id;
}
}
lck_rw_done(&necp_kernel_policy_lock);
- return (matched_policy_id);
+ return matched_policy_id;
}
// Utilities
int cmp = 0;
if (addr == NULL || range_start == NULL || range_end == NULL) {
- return (FALSE);
+ return FALSE;
}
/* Must be greater than or equal to start */
cmp = necp_addr_compare(addr, range_start, 1);
if (cmp != 0 && cmp != 1) {
- return (FALSE);
+ return FALSE;
}
/* Must be less than or equal to end */
cmp = necp_addr_compare(addr, range_end, 1);
if (cmp != 0 && cmp != -1) {
- return (FALSE);
+ return FALSE;
}
- return (TRUE);
+ return TRUE;
}
static bool
int cmp = 0;
if (inner_range_start == NULL || inner_range_end == NULL || range_start == NULL || range_end == NULL) {
- return (FALSE);
+ return FALSE;
}
/* Must be greater than or equal to start */
cmp = necp_addr_compare(inner_range_start, range_start, 1);
if (cmp != 0 && cmp != 1) {
- return (FALSE);
+ return FALSE;
}
/* Must be less than or equal to end */
cmp = necp_addr_compare(inner_range_end, range_end, 1);
if (cmp != 0 && cmp != -1) {
- return (FALSE);
+ return FALSE;
}
- return (TRUE);
+ return TRUE;
}
static bool
necp_is_addr_in_subnet(struct sockaddr *addr, struct sockaddr *subnet_addr, u_int8_t subnet_prefix)
{
if (addr == NULL || subnet_addr == NULL) {
- return (FALSE);
+ return FALSE;
}
if (addr->sa_family != subnet_addr->sa_family || addr->sa_len != subnet_addr->sa_len) {
- return (FALSE);
+ return FALSE;
}
switch (addr->sa_family) {
- case AF_INET: {
- if (satosin(subnet_addr)->sin_port != 0 &&
- satosin(addr)->sin_port != satosin(subnet_addr)->sin_port) {
- return (FALSE);
- }
- return (necp_buffer_compare_with_bit_prefix((u_int8_t *)&satosin(addr)->sin_addr, (u_int8_t *)&satosin(subnet_addr)->sin_addr, subnet_prefix));
+ case AF_INET: {
+ if (satosin(subnet_addr)->sin_port != 0 &&
+ satosin(addr)->sin_port != satosin(subnet_addr)->sin_port) {
+ return FALSE;
}
- case AF_INET6: {
- if (satosin6(subnet_addr)->sin6_port != 0 &&
- satosin6(addr)->sin6_port != satosin6(subnet_addr)->sin6_port) {
- return (FALSE);
- }
- if (satosin6(addr)->sin6_scope_id &&
- satosin6(subnet_addr)->sin6_scope_id &&
- satosin6(addr)->sin6_scope_id != satosin6(subnet_addr)->sin6_scope_id) {
- return (FALSE);
- }
- return (necp_buffer_compare_with_bit_prefix((u_int8_t *)&satosin6(addr)->sin6_addr, (u_int8_t *)&satosin6(subnet_addr)->sin6_addr, subnet_prefix));
+ return necp_buffer_compare_with_bit_prefix((u_int8_t *)&satosin(addr)->sin_addr, (u_int8_t *)&satosin(subnet_addr)->sin_addr, subnet_prefix);
+ }
+ case AF_INET6: {
+ if (satosin6(subnet_addr)->sin6_port != 0 &&
+ satosin6(addr)->sin6_port != satosin6(subnet_addr)->sin6_port) {
+ return FALSE;
}
- default: {
- return (FALSE);
+ if (satosin6(addr)->sin6_scope_id &&
+ satosin6(subnet_addr)->sin6_scope_id &&
+ satosin6(addr)->sin6_scope_id != satosin6(subnet_addr)->sin6_scope_id) {
+ return FALSE;
}
+ return necp_buffer_compare_with_bit_prefix((u_int8_t *)&satosin6(addr)->sin6_addr, (u_int8_t *)&satosin6(subnet_addr)->sin6_addr, subnet_prefix);
+ }
+ default: {
+ return FALSE;
+ }
}
- return (FALSE);
+ return FALSE;
}
/*
int port_result = 0;
if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) {
- return (2);
+ return 2;
}
if (sa1->sa_len == 0) {
- return (0);
+ return 0;
}
switch (sa1->sa_family) {
- case AF_INET: {
- if (sa1->sa_len != sizeof(struct sockaddr_in)) {
- return (2);
- }
-
- result = memcmp(&satosin(sa1)->sin_addr.s_addr, &satosin(sa2)->sin_addr.s_addr, sizeof(satosin(sa1)->sin_addr.s_addr));
+ case AF_INET: {
+ if (sa1->sa_len != sizeof(struct sockaddr_in)) {
+ return 2;
+ }
- if (check_port) {
- if (satosin(sa1)->sin_port < satosin(sa2)->sin_port) {
- port_result = -1;
- } else if (satosin(sa1)->sin_port > satosin(sa2)->sin_port) {
- port_result = 1;
- }
+ result = memcmp(&satosin(sa1)->sin_addr.s_addr, &satosin(sa2)->sin_addr.s_addr, sizeof(satosin(sa1)->sin_addr.s_addr));
- if (result == 0) {
- result = port_result;
- } else if ((result > 0 && port_result < 0) || (result < 0 && port_result > 0)) {
- return (2);
- }
+ if (check_port) {
+ if (satosin(sa1)->sin_port < satosin(sa2)->sin_port) {
+ port_result = -1;
+ } else if (satosin(sa1)->sin_port > satosin(sa2)->sin_port) {
+ port_result = 1;
}
- break;
- }
- case AF_INET6: {
- if (sa1->sa_len != sizeof(struct sockaddr_in6)) {
- return (2);
+ if (result == 0) {
+ result = port_result;
+ } else if ((result > 0 && port_result < 0) || (result < 0 && port_result > 0)) {
+ return 2;
}
+ }
- if (satosin6(sa1)->sin6_scope_id != satosin6(sa2)->sin6_scope_id) {
- return (2);
- }
+ break;
+ }
+ case AF_INET6: {
+ if (sa1->sa_len != sizeof(struct sockaddr_in6)) {
+ return 2;
+ }
- result = memcmp(&satosin6(sa1)->sin6_addr.s6_addr[0], &satosin6(sa2)->sin6_addr.s6_addr[0], sizeof(struct in6_addr));
+ if (satosin6(sa1)->sin6_scope_id != satosin6(sa2)->sin6_scope_id) {
+ return 2;
+ }
- if (check_port) {
- if (satosin6(sa1)->sin6_port < satosin6(sa2)->sin6_port) {
- port_result = -1;
- } else if (satosin6(sa1)->sin6_port > satosin6(sa2)->sin6_port) {
- port_result = 1;
- }
+ result = memcmp(&satosin6(sa1)->sin6_addr.s6_addr[0], &satosin6(sa2)->sin6_addr.s6_addr[0], sizeof(struct in6_addr));
- if (result == 0) {
- result = port_result;
- } else if ((result > 0 && port_result < 0) || (result < 0 && port_result > 0)) {
- return (2);
- }
+ if (check_port) {
+ if (satosin6(sa1)->sin6_port < satosin6(sa2)->sin6_port) {
+ port_result = -1;
+ } else if (satosin6(sa1)->sin6_port > satosin6(sa2)->sin6_port) {
+ port_result = 1;
}
- break;
- }
- default: {
- result = memcmp(sa1, sa2, sa1->sa_len);
- break;
+ if (result == 0) {
+ result = port_result;
+ } else if ((result > 0 && port_result < 0) || (result < 0 && port_result > 0)) {
+ return 2;
+ }
}
+
+ break;
+ }
+ default: {
+ result = memcmp(sa1, sa2, sa1->sa_len);
+ break;
+ }
}
if (result < 0) {
result = (1);
}
- return (result);
+ return result;
}
static bool
/* Handle null pointers */
if (p1 == NULL || p2 == NULL) {
- return (p1 == p2);
+ return p1 == p2;
}
while (bits >= 8) {
if (*p1++ != *p2++) {
- return (FALSE);
+ return FALSE;
}
bits -= 8;
}
if (bits > 0) {
- mask = ~((1<<(8-bits))-1);
+ mask = ~((1 << (8 - bits)) - 1);
if ((*p1 & mask) != (*p2 & mask)) {
- return (FALSE);
+ return FALSE;
}
}
- return (TRUE);
+ return TRUE;
}
-// Socket operations
-#define NECP_MAX_SOCKET_ATTRIBUTE_STRING_LENGTH 253
+static bool
+necp_addr_is_empty(struct sockaddr *addr)
+{
+ if (addr == NULL) {
+ return TRUE;
+ }
+
+ if (addr->sa_len == 0) {
+ return TRUE;
+ }
+
+ switch (addr->sa_family) {
+ case AF_INET: {
+ static struct sockaddr_in ipv4_empty_address = {
+ .sin_len = sizeof(struct sockaddr_in),
+ .sin_family = AF_INET,
+ .sin_port = 0,
+ .sin_addr = { .s_addr = 0 }, // 0.0.0.0
+ .sin_zero = {0},
+ };
+ if (necp_addr_compare(addr, (struct sockaddr *)&ipv4_empty_address, 0) == 0) {
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+ }
+ case AF_INET6: {
+ static struct sockaddr_in6 ipv6_empty_address = {
+ .sin6_len = sizeof(struct sockaddr_in6),
+ .sin6_family = AF_INET6,
+ .sin6_port = 0,
+ .sin6_flowinfo = 0,
+ .sin6_addr = IN6ADDR_ANY_INIT, // ::
+ .sin6_scope_id = 0,
+ };
+ if (necp_addr_compare(addr, (struct sockaddr *)&ipv6_empty_address, 0) == 0) {
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+ }
+ default:
+ return FALSE;
+ }
+
+ return FALSE;
+}
static bool
-necp_set_socket_attribute(u_int8_t *buffer, size_t buffer_length, u_int8_t type, char **buffer_p)
+necp_update_qos_marking(struct ifnet *ifp, u_int32_t route_rule_id)
{
- int error = 0;
- int cursor = 0;
- size_t string_size = 0;
- char *local_string = NULL;
- u_int8_t *value = NULL;
+ bool qos_marking = FALSE;
+ int exception_index = 0;
+ struct necp_route_rule *route_rule = NULL;
- cursor = necp_buffer_find_tlv(buffer, buffer_length, 0, type, 0);
- if (cursor < 0) {
- // This will clear out the parameter
+ route_rule = necp_lookup_route_rule_locked(&necp_route_rules, route_rule_id);
+ if (route_rule == NULL) {
+ qos_marking = FALSE;
goto done;
}
- string_size = necp_buffer_get_tlv_length(buffer, cursor);
- if (string_size == 0 || string_size > NECP_MAX_SOCKET_ATTRIBUTE_STRING_LENGTH) {
- // This will clear out the parameter
+ qos_marking = (route_rule->default_action == NECP_ROUTE_RULE_QOS_MARKING) ? TRUE : FALSE;
+
+ if (ifp == NULL) {
goto done;
}
- MALLOC(local_string, char *, string_size + 1, M_NECP, M_WAITOK);
- if (local_string == NULL) {
- NECPLOG(LOG_ERR, "Failed to allocate a socket attribute buffer (size %d)", string_size);
- goto fail;
+ for (exception_index = 0; exception_index < MAX_ROUTE_RULE_INTERFACES; exception_index++) {
+ if (route_rule->exception_if_indices[exception_index] == 0) {
+ break;
+ }
+ if (route_rule->exception_if_actions[exception_index] != NECP_ROUTE_RULE_QOS_MARKING) {
+ continue;
+ }
+ if (route_rule->exception_if_indices[exception_index] == ifp->if_index) {
+ qos_marking = TRUE;
+ if (necp_debug > 2) {
+ NECPLOG(LOG_DEBUG, "QoS Marking : Interface match %d for Rule %d Allowed %d",
+ route_rule->exception_if_indices[exception_index], route_rule_id, qos_marking);
+ }
+ goto done;
+ }
}
- value = necp_buffer_get_tlv_value(buffer, cursor, NULL);
- if (value == NULL) {
- NECPLOG0(LOG_ERR, "Failed to get socket attribute");
- goto fail;
+ if ((route_rule->cellular_action == NECP_ROUTE_RULE_QOS_MARKING && IFNET_IS_CELLULAR(ifp)) ||
+ (route_rule->wifi_action == NECP_ROUTE_RULE_QOS_MARKING && IFNET_IS_WIFI(ifp)) ||
+ (route_rule->wired_action == NECP_ROUTE_RULE_QOS_MARKING && IFNET_IS_WIRED(ifp)) ||
+ (route_rule->expensive_action == NECP_ROUTE_RULE_QOS_MARKING && IFNET_IS_EXPENSIVE(ifp)) ||
+ (route_rule->constrained_action == NECP_ROUTE_RULE_QOS_MARKING && IFNET_IS_CONSTRAINED(ifp))) {
+ qos_marking = TRUE;
+ if (necp_debug > 2) {
+ NECPLOG(LOG_DEBUG, "QoS Marking: C:%d WF:%d W:%d E:%d Cn:%d for Rule %d Allowed %d",
+ route_rule->cellular_action, route_rule->wifi_action, route_rule->wired_action,
+ route_rule->expensive_action, route_rule->constrained_action, route_rule_id, qos_marking);
+ }
+ goto done;
}
-
- memcpy(local_string, value, string_size);
- local_string[string_size] = 0;
-
done:
- if (*buffer_p != NULL) {
- FREE(*buffer_p, M_NECP);
- *buffer_p = NULL;
- }
-
- *buffer_p = local_string;
- return (0);
-fail:
- if (local_string != NULL) {
- FREE(local_string, M_NECP);
+ if (necp_debug > 1) {
+ NECPLOG(LOG_DEBUG, "QoS Marking: Rule %d ifp %s Allowed %d",
+ route_rule_id, ifp ? ifp->if_xname : "", qos_marking);
}
- return (error);
+ return qos_marking;
}
-errno_t
-necp_set_socket_attributes(struct socket *so, struct sockopt *sopt)
+bool
+necp_lookup_current_qos_marking(int32_t *qos_marking_gencount, struct rtentry *route, struct ifnet *interface, u_int32_t route_rule_id, bool old_qos_marking)
{
- int error = 0;
- u_int8_t *buffer = NULL;
- struct inpcb *inp = NULL;
-
- if ((SOCK_DOM(so) != PF_INET
-#if INET6
- && SOCK_DOM(so) != PF_INET6
-#endif
- )) {
- error = EINVAL;
- goto done;
- }
-
- inp = sotoinpcb(so);
-
- size_t valsize = sopt->sopt_valsize;
- if (valsize == 0 ||
- valsize > ((sizeof(u_int8_t) + sizeof(u_int32_t) + NECP_MAX_SOCKET_ATTRIBUTE_STRING_LENGTH) * 2)) {
- goto done;
- }
+ bool new_qos_marking = old_qos_marking;
+ struct ifnet *ifp = interface;
- MALLOC(buffer, u_int8_t *, valsize, M_NECP, M_WAITOK);
- if (buffer == NULL) {
- goto done;
+ if (net_qos_policy_restricted == 0) {
+ return new_qos_marking;
}
- error = sooptcopyin(sopt, buffer, valsize, 0);
- if (error) {
- goto done;
+ /*
+ * This is racy but we do not need the performance hit of taking necp_kernel_policy_lock
+ */
+ if (*qos_marking_gencount == necp_kernel_socket_policies_gencount) {
+ return new_qos_marking;
}
- error = necp_set_socket_attribute(buffer, valsize, NECP_TLV_ATTRIBUTE_DOMAIN, &inp->inp_necp_attributes.inp_domain);
- if (error) {
- NECPLOG0(LOG_ERR, "Could not set domain TLV for socket attributes");
- goto done;
- }
+ lck_rw_lock_shared(&necp_kernel_policy_lock);
- error = necp_set_socket_attribute(buffer, valsize, NECP_TLV_ATTRIBUTE_ACCOUNT, &inp->inp_necp_attributes.inp_account);
- if (error) {
- NECPLOG0(LOG_ERR, "Could not set account TLV for socket attributes");
+ if (ifp == NULL && route != NULL) {
+ ifp = route->rt_ifp;
+ }
+ /*
+ * By default, until we have a interface, do not mark and reevaluate the Qos marking policy
+ */
+ if (ifp == NULL || route_rule_id == 0) {
+ new_qos_marking = FALSE;
goto done;
}
- if (necp_debug) {
- NECPLOG(LOG_DEBUG, "Set on socket: Domain %s, Account %s", inp->inp_necp_attributes.inp_domain, inp->inp_necp_attributes.inp_account);
- }
-done:
- if (buffer != NULL) {
- FREE(buffer, M_NECP);
+ if (ROUTE_RULE_IS_AGGREGATE(route_rule_id)) {
+ struct necp_aggregate_route_rule *aggregate_route_rule = necp_lookup_aggregate_route_rule_locked(route_rule_id);
+ if (aggregate_route_rule != NULL) {
+ int index = 0;
+ for (index = 0; index < MAX_AGGREGATE_ROUTE_RULES; index++) {
+ u_int32_t sub_route_rule_id = aggregate_route_rule->rule_ids[index];
+ if (sub_route_rule_id == 0) {
+ break;
+ }
+ new_qos_marking = necp_update_qos_marking(ifp, sub_route_rule_id);
+ if (new_qos_marking == TRUE) {
+ break;
+ }
+ }
+ }
+ } else {
+ new_qos_marking = necp_update_qos_marking(ifp, route_rule_id);
}
+ /*
+ * Now that we have an interface we remember the gencount
+ */
+ *qos_marking_gencount = necp_kernel_socket_policies_gencount;
- return (error);
+done:
+ lck_rw_done(&necp_kernel_policy_lock);
+ return new_qos_marking;
}
-errno_t
-necp_get_socket_attributes(struct socket *so, struct sockopt *sopt)
+void
+necp_socket_update_qos_marking(struct inpcb *inp, struct rtentry *route, u_int32_t route_rule_id)
{
- int error = 0;
- u_int8_t *buffer = NULL;
- u_int8_t *cursor = NULL;
- size_t valsize = 0;
- struct inpcb *inp = sotoinpcb(so);
-
- if (inp->inp_necp_attributes.inp_domain != NULL) {
- valsize += sizeof(u_int8_t) + sizeof(u_int32_t) + strlen(inp->inp_necp_attributes.inp_domain);
- }
- if (inp->inp_necp_attributes.inp_account != NULL) {
- valsize += sizeof(u_int8_t) + sizeof(u_int32_t) + strlen(inp->inp_necp_attributes.inp_account);
+ bool qos_marking = inp->inp_socket->so_flags1 & SOF1_QOSMARKING_ALLOWED ? TRUE : FALSE;
+
+ if (net_qos_policy_restricted == 0) {
+ return;
}
- if (valsize == 0) {
- goto done;
+ if (inp->inp_socket == NULL) {
+ return;
}
-
- MALLOC(buffer, u_int8_t *, valsize, M_NECP, M_WAITOK);
- if (buffer == NULL) {
- goto done;
+ if ((inp->inp_socket->so_flags1 & SOF1_QOSMARKING_POLICY_OVERRIDE)) {
+ return;
}
- cursor = buffer;
- if (inp->inp_necp_attributes.inp_domain != NULL) {
- cursor = necp_buffer_write_tlv(cursor, NECP_TLV_ATTRIBUTE_DOMAIN, strlen(inp->inp_necp_attributes.inp_domain), inp->inp_necp_attributes.inp_domain);
- }
+ qos_marking = necp_lookup_current_qos_marking(&(inp->inp_policyresult.results.qos_marking_gencount), route, NULL, route_rule_id, qos_marking);
- if (inp->inp_necp_attributes.inp_account != NULL) {
- cursor = necp_buffer_write_tlv(cursor, NECP_TLV_ATTRIBUTE_ACCOUNT, strlen(inp->inp_necp_attributes.inp_account), inp->inp_necp_attributes.inp_account);
+ if (qos_marking == TRUE) {
+ inp->inp_socket->so_flags1 |= SOF1_QOSMARKING_ALLOWED;
+ } else {
+ inp->inp_socket->so_flags1 &= ~SOF1_QOSMARKING_ALLOWED;
}
+}
- error = sooptcopyout(sopt, buffer, valsize);
- if (error) {
- goto done;
+static bool
+necp_route_is_lqm_abort(struct ifnet *ifp, struct ifnet *delegated_ifp)
+{
+ if (ifp != NULL &&
+ (ifp->if_interface_state.valid_bitmask & IF_INTERFACE_STATE_LQM_STATE_VALID) &&
+ ifp->if_interface_state.lqm_state == IFNET_LQM_THRESH_ABORT) {
+ return true;
}
-done:
- if (buffer != NULL) {
- FREE(buffer, M_NECP);
+ if (delegated_ifp != NULL &&
+ (delegated_ifp->if_interface_state.valid_bitmask & IF_INTERFACE_STATE_LQM_STATE_VALID) &&
+ delegated_ifp->if_interface_state.lqm_state == IFNET_LQM_THRESH_ABORT) {
+ return true;
}
-
- return (error);
+ return false;
}
static bool
-necp_route_is_allowed_inner(struct rtentry *route, struct ifnet *ifp, u_int32_t route_rule_id, bool *cellular_denied)
+necp_route_is_allowed_inner(struct rtentry *route, struct ifnet *ifp, u_int32_t route_rule_id, u_int32_t *interface_type_denied)
{
bool default_is_allowed = TRUE;
u_int8_t type_aggregate_action = NECP_ROUTE_RULE_NONE;
route_rule = necp_lookup_route_rule_locked(&necp_route_rules, route_rule_id);
if (route_rule == NULL) {
- return (TRUE);
+ return TRUE;
}
default_is_allowed = (route_rule->default_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? FALSE : TRUE;
if (necp_debug > 1 && !default_is_allowed) {
NECPLOG(LOG_DEBUG, "Route Allowed: No interface for route, using default for Rule %d Allowed %d", route_rule_id, default_is_allowed);
}
- return (default_is_allowed);
+ return default_is_allowed;
}
delegated_ifp = ifp->if_delegated.ifp;
break;
}
if (route_rule->exception_if_indices[exception_index] == ifp->if_index ||
- (delegated_ifp != NULL && route_rule->exception_if_indices[exception_index] == delegated_ifp->if_index)) {
- if (necp_debug > 1) {
- NECPLOG(LOG_DEBUG, "Route Allowed: Interface match %d for Rule %d Allowed %d", route_rule->exception_if_indices[exception_index], route_rule_id, ((route_rule->exception_if_actions[exception_index] == NECP_ROUTE_RULE_DENY_INTERFACE) ? FALSE : TRUE));
+ (delegated_ifp != NULL && route_rule->exception_if_indices[exception_index] == delegated_ifp->if_index)) {
+ if (route_rule->exception_if_actions[exception_index] == NECP_ROUTE_RULE_DENY_LQM_ABORT) {
+ const bool lqm_abort = necp_route_is_lqm_abort(ifp, delegated_ifp);
+ if (necp_debug > 1 && lqm_abort) {
+ NECPLOG(LOG_DEBUG, "Route Allowed: Interface match %d for Rule %d Deny LQM Abort",
+ route_rule->exception_if_indices[exception_index], route_rule_id);
+ }
+ return false;
+ } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->exception_if_actions[exception_index])) {
+ if (necp_debug > 1) {
+ NECPLOG(LOG_DEBUG, "Route Allowed: Interface match %d for Rule %d Allowed %d", route_rule->exception_if_indices[exception_index], route_rule_id, ((route_rule->exception_if_actions[exception_index] == NECP_ROUTE_RULE_DENY_INTERFACE) ? FALSE : TRUE));
+ }
+ return (route_rule->exception_if_actions[exception_index] == NECP_ROUTE_RULE_DENY_INTERFACE) ? FALSE : TRUE;
}
- return ((route_rule->exception_if_actions[exception_index] == NECP_ROUTE_RULE_DENY_INTERFACE) ? FALSE : TRUE);
}
}
- if (route_rule->cellular_action != NECP_ROUTE_RULE_NONE &&
- IFNET_IS_CELLULAR(ifp)) {
- if (cellular_denied != NULL) {
- // Let clients know that cellular was blocked
- *cellular_denied = TRUE;
- }
- if (type_aggregate_action == NECP_ROUTE_RULE_NONE ||
- (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE &&
- route_rule->cellular_action == NECP_ROUTE_RULE_DENY_INTERFACE)) {
+ if (IFNET_IS_CELLULAR(ifp)) {
+ if (route_rule->cellular_action == NECP_ROUTE_RULE_DENY_LQM_ABORT) {
+ if (necp_route_is_lqm_abort(ifp, delegated_ifp)) {
+ if (interface_type_denied != NULL) {
+ *interface_type_denied = IFRTYPE_FUNCTIONAL_CELLULAR;
+ }
+ // Mark aggregate action as deny
+ type_aggregate_action = NECP_ROUTE_RULE_DENY_INTERFACE;
+ }
+ } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->cellular_action)) {
+ if (interface_type_denied != NULL) {
+ *interface_type_denied = IFRTYPE_FUNCTIONAL_CELLULAR;
+ }
+ if (type_aggregate_action == NECP_ROUTE_RULE_NONE ||
+ (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE &&
+ route_rule->cellular_action == NECP_ROUTE_RULE_DENY_INTERFACE)) {
// Deny wins if there is a conflict
type_aggregate_action = route_rule->cellular_action;
}
+ }
}
- if (route_rule->wifi_action != NECP_ROUTE_RULE_NONE &&
- IFNET_IS_WIFI(ifp)) {
- if (type_aggregate_action == NECP_ROUTE_RULE_NONE ||
- (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE &&
- route_rule->wifi_action == NECP_ROUTE_RULE_DENY_INTERFACE)) {
+ if (IFNET_IS_WIFI(ifp)) {
+ if (route_rule->wifi_action == NECP_ROUTE_RULE_DENY_LQM_ABORT) {
+ if (necp_route_is_lqm_abort(ifp, delegated_ifp)) {
+ if (interface_type_denied != NULL) {
+ *interface_type_denied = IFRTYPE_FUNCTIONAL_WIFI_INFRA;
+ }
+ // Mark aggregate action as deny
+ type_aggregate_action = NECP_ROUTE_RULE_DENY_INTERFACE;
+ }
+ } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->wifi_action)) {
+ if (interface_type_denied != NULL) {
+ *interface_type_denied = IFRTYPE_FUNCTIONAL_WIFI_INFRA;
+ }
+ if (type_aggregate_action == NECP_ROUTE_RULE_NONE ||
+ (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE &&
+ route_rule->wifi_action == NECP_ROUTE_RULE_DENY_INTERFACE)) {
// Deny wins if there is a conflict
type_aggregate_action = route_rule->wifi_action;
}
+ }
}
- if (route_rule->wired_action != NECP_ROUTE_RULE_NONE &&
- IFNET_IS_WIRED(ifp)) {
- if (type_aggregate_action == NECP_ROUTE_RULE_NONE ||
- (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE &&
- route_rule->wired_action == NECP_ROUTE_RULE_DENY_INTERFACE)) {
+ if (IFNET_IS_WIRED(ifp)) {
+ if (route_rule->wired_action == NECP_ROUTE_RULE_DENY_LQM_ABORT) {
+ if (necp_route_is_lqm_abort(ifp, delegated_ifp)) {
+ if (interface_type_denied != NULL) {
+ *interface_type_denied = IFRTYPE_FUNCTIONAL_WIRED;
+ }
+ // Mark aggregate action as deny
+ type_aggregate_action = NECP_ROUTE_RULE_DENY_INTERFACE;
+ }
+ } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->wired_action)) {
+ if (interface_type_denied != NULL) {
+ *interface_type_denied = IFRTYPE_FUNCTIONAL_WIRED;
+ }
+ if (type_aggregate_action == NECP_ROUTE_RULE_NONE ||
+ (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE &&
+ route_rule->wired_action == NECP_ROUTE_RULE_DENY_INTERFACE)) {
// Deny wins if there is a conflict
type_aggregate_action = route_rule->wired_action;
}
+ }
}
- if (route_rule->expensive_action != NECP_ROUTE_RULE_NONE &&
- IFNET_IS_EXPENSIVE(ifp)) {
- if (type_aggregate_action == NECP_ROUTE_RULE_NONE ||
- (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE &&
- route_rule->expensive_action == NECP_ROUTE_RULE_DENY_INTERFACE)) {
+ if (IFNET_IS_EXPENSIVE(ifp)) {
+ if (route_rule->expensive_action == NECP_ROUTE_RULE_DENY_LQM_ABORT) {
+ if (necp_route_is_lqm_abort(ifp, delegated_ifp)) {
+ // Mark aggregate action as deny
+ type_aggregate_action = NECP_ROUTE_RULE_DENY_INTERFACE;
+ }
+ } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->expensive_action)) {
+ if (type_aggregate_action == NECP_ROUTE_RULE_NONE ||
+ (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE &&
+ route_rule->expensive_action == NECP_ROUTE_RULE_DENY_INTERFACE)) {
// Deny wins if there is a conflict
type_aggregate_action = route_rule->expensive_action;
}
+ }
+ }
+
+ if (IFNET_IS_CONSTRAINED(ifp)) {
+ if (route_rule->constrained_action == NECP_ROUTE_RULE_DENY_LQM_ABORT) {
+ if (necp_route_is_lqm_abort(ifp, delegated_ifp)) {
+ // Mark aggregate action as deny
+ type_aggregate_action = NECP_ROUTE_RULE_DENY_INTERFACE;
+ }
+ } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->constrained_action)) {
+ if (type_aggregate_action == NECP_ROUTE_RULE_NONE ||
+ (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE &&
+ route_rule->constrained_action == NECP_ROUTE_RULE_DENY_INTERFACE)) {
+ // Deny wins if there is a conflict
+ type_aggregate_action = route_rule->constrained_action;
+ }
+ }
}
if (type_aggregate_action != NECP_ROUTE_RULE_NONE) {
if (necp_debug > 1) {
NECPLOG(LOG_DEBUG, "Route Allowed: C:%d WF:%d W:%d E:%d for Rule %d Allowed %d", route_rule->cellular_action, route_rule->wifi_action, route_rule->wired_action, route_rule->expensive_action, route_rule_id, ((type_aggregate_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? FALSE : TRUE));
}
- return ((type_aggregate_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? FALSE : TRUE);
+ return (type_aggregate_action == NECP_ROUTE_RULE_DENY_INTERFACE) ? FALSE : TRUE;
}
if (necp_debug > 1 && !default_is_allowed) {
NECPLOG(LOG_DEBUG, "Route Allowed: Using default for Rule %d Allowed %d", route_rule_id, default_is_allowed);
}
- return (default_is_allowed);
+ return default_is_allowed;
}
static bool
-necp_route_is_allowed(struct rtentry *route, struct ifnet *interface, u_int32_t route_rule_id, bool *cellular_denied)
+necp_route_is_allowed(struct rtentry *route, struct ifnet *interface, u_int32_t route_rule_id, u_int32_t *interface_type_denied)
{
if ((route == NULL && interface == NULL) || route_rule_id == 0) {
if (necp_debug > 1) {
NECPLOG(LOG_DEBUG, "Route Allowed: no route or interface, Rule %d Allowed %d", route_rule_id, TRUE);
}
- return (TRUE);
+ return TRUE;
}
if (ROUTE_RULE_IS_AGGREGATE(route_rule_id)) {
if (sub_route_rule_id == 0) {
break;
}
- if (!necp_route_is_allowed_inner(route, interface, sub_route_rule_id, cellular_denied)) {
- return (FALSE);
+ if (!necp_route_is_allowed_inner(route, interface, sub_route_rule_id, interface_type_denied)) {
+ return FALSE;
}
}
}
} else {
- return (necp_route_is_allowed_inner(route, interface, route_rule_id, cellular_denied));
+ return necp_route_is_allowed_inner(route, interface, route_rule_id, interface_type_denied);
}
- return (TRUE);
+ return TRUE;
}
bool
bool is_allowed = TRUE;
u_int32_t route_rule_id = necp_get_route_rule_id_from_packet(packet);
if (route_rule_id != 0 &&
- interface != NULL) {
+ interface != NULL) {
lck_rw_lock_shared(&necp_kernel_policy_lock);
is_allowed = necp_route_is_allowed(NULL, interface, necp_get_route_rule_id_from_packet(packet), NULL);
lck_rw_done(&necp_kernel_policy_lock);
}
- return (is_allowed);
+ return is_allowed;
}
static bool
if (agent_flags & NETAGENT_FLAG_ACTIVE) {
continue;
} else if ((agent_flags & NETAGENT_FLAG_VOLUNTARY) == 0) {
- return (FALSE);
+ return FALSE;
}
}
}
}
- return (TRUE);
+ return TRUE;
+}
+
+static bool
+necp_packet_filter_tags_receive(u_int16_t pf_tag, u_int32_t pass_flags)
+{
+ bool allowed_to_receive = TRUE;
+
+ if (pf_tag == PF_TAG_ID_STACK_DROP &&
+ (pass_flags & NECP_KERNEL_POLICY_PASS_PF_TAG) != NECP_KERNEL_POLICY_PASS_PF_TAG) {
+ allowed_to_receive = FALSE;
+ }
+
+ return allowed_to_receive;
}
static bool
-necp_socket_is_allowed_to_send_recv_internal(struct inpcb *inp, struct sockaddr *override_local_addr, struct sockaddr *override_remote_addr, ifnet_t interface, necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id)
+necp_socket_is_allowed_to_send_recv_internal(struct inpcb *inp, struct sockaddr *override_local_addr, struct sockaddr *override_remote_addr, ifnet_t interface, u_int16_t pf_tag, necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id, necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags)
{
u_int32_t verifyifindex = interface ? interface->if_index : 0;
bool allowed_to_receive = TRUE;
necp_kernel_policy_service service = { 0, 0 };
u_int32_t route_rule_id = 0;
struct rtentry *route = NULL;
- bool cellular_denied = FALSE;
-
+ u_int32_t interface_type_denied = IFRTYPE_FUNCTIONAL_UNKNOWN;
+ necp_kernel_policy_result drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE;
+ necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE;
u_int32_t netagent_ids[NECP_MAX_NETAGENTS];
+ proc_t socket_proc = NULL;
+ necp_kernel_policy_filter filter_control_unit = 0;
+ u_int32_t pass_flags = 0;
+ u_int32_t flow_divert_aggregate_unit = 0;
+ necp_socket_bypass_type_t bypass_type = NECP_BYPASS_TYPE_NONE;
+
memset(&netagent_ids, 0, sizeof(netagent_ids));
if (return_policy_id) {
*return_policy_id = NECP_KERNEL_POLICY_ID_NONE;
}
+ if (return_skip_policy_id) {
+ *return_skip_policy_id = NECP_KERNEL_POLICY_ID_NONE;
+ }
if (return_route_rule_id) {
*return_route_rule_id = 0;
}
+ if (return_pass_flags) {
+ *return_pass_flags = 0;
+ }
if (inp == NULL) {
goto done;
route = inp->inp_route.ro_rt;
+ struct socket *so = inp->inp_socket;
+
+ u_int32_t drop_order = necp_process_drop_order(so->so_cred);
+
// Don't lock. Possible race condition, but we don't want the performance hit.
if (necp_kernel_socket_policies_count == 0 ||
- (!(inp->inp_flags2 & INP2_WANT_APP_POLICY) && necp_kernel_socket_policies_non_app_count == 0)) {
- if (necp_drop_all_order > 0) {
- if (necp_pass_loopback > 0 &&
- necp_is_loopback(override_local_addr, override_remote_addr, inp, NULL)) {
+ (!(inp->inp_flags2 & INP2_WANT_APP_POLICY) && necp_kernel_socket_policies_non_app_count == 0)) {
+ if (necp_drop_all_order > 0 || drop_order > 0) {
+ if (necp_socket_bypass(override_local_addr, override_remote_addr, inp) != NECP_BYPASS_TYPE_NONE) {
allowed_to_receive = TRUE;
} else {
allowed_to_receive = FALSE;
if ((necp_socket_is_connected(inp) || (override_local_addr == NULL && override_remote_addr == NULL)) && inp->inp_policyresult.policy_id != NECP_KERNEL_POLICY_ID_NONE) {
bool policies_have_changed = FALSE;
bool route_allowed = TRUE;
- lck_rw_lock_shared(&necp_kernel_policy_lock);
+
if (inp->inp_policyresult.policy_gencount != necp_kernel_socket_policies_gencount) {
policies_have_changed = TRUE;
} else {
- if (inp->inp_policyresult.results.route_rule_id != 0 &&
- !necp_route_is_allowed(route, interface, inp->inp_policyresult.results.route_rule_id, &cellular_denied)) {
- route_allowed = FALSE;
+ if (inp->inp_policyresult.results.route_rule_id != 0) {
+ lck_rw_lock_shared(&necp_kernel_policy_lock);
+ if (!necp_route_is_allowed(route, interface, inp->inp_policyresult.results.route_rule_id, &interface_type_denied)) {
+ route_allowed = FALSE;
+ }
+ lck_rw_done(&necp_kernel_policy_lock);
}
}
- lck_rw_done(&necp_kernel_policy_lock);
if (!policies_have_changed) {
if (!route_allowed ||
- inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_DROP ||
- inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT ||
- (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && interface &&
- inp->inp_policyresult.results.result_parameter.tunnel_interface_index != verifyifindex)) {
- allowed_to_receive = FALSE;
- } else {
- if (return_policy_id) {
- *return_policy_id = inp->inp_policyresult.policy_id;
- }
- if (return_route_rule_id) {
- *return_route_rule_id = inp->inp_policyresult.results.route_rule_id;
- }
+ inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_DROP ||
+ inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT ||
+ (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && interface &&
+ inp->inp_policyresult.results.result_parameter.tunnel_interface_index != verifyifindex)) {
+ allowed_to_receive = FALSE;
+ } else {
+ if (return_policy_id) {
+ *return_policy_id = inp->inp_policyresult.policy_id;
+ }
+ if (return_skip_policy_id) {
+ *return_skip_policy_id = inp->inp_policyresult.skip_policy_id;
+ }
+ if (return_route_rule_id) {
+ *return_route_rule_id = inp->inp_policyresult.results.route_rule_id;
+ }
+ if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_PASS) {
+ pass_flags = inp->inp_policyresult.results.result_parameter.pass_flags;
}
+ }
goto done;
}
}
// Check for loopback exception
- if (necp_pass_loopback > 0 &&
- necp_is_loopback(override_local_addr, override_remote_addr, inp, NULL)) {
+ bypass_type = necp_socket_bypass(override_local_addr, override_remote_addr, inp);
+ if (bypass_type == NECP_BYPASS_TYPE_INTCOPROC || (bypass_type == NECP_BYPASS_TYPE_LOOPBACK && necp_pass_loopback == NECP_LOOPBACK_PASS_ALL)) {
allowed_to_receive = TRUE;
goto done;
}
// Actually calculate policy result
lck_rw_lock_shared(&necp_kernel_policy_lock);
- necp_socket_fillout_info_locked(inp, override_local_addr, override_remote_addr, 0, &info);
+ necp_socket_fillout_info_locked(inp, override_local_addr, override_remote_addr, 0, drop_order, &socket_proc, &info, (bypass_type == NECP_BYPASS_TYPE_LOOPBACK));
flowhash = necp_socket_calc_flowhash_locked(&info);
if (inp->inp_policyresult.policy_id != NECP_KERNEL_POLICY_ID_NONE &&
- inp->inp_policyresult.policy_gencount == necp_kernel_socket_policies_gencount &&
- inp->inp_policyresult.flowhash == flowhash) {
+ inp->inp_policyresult.policy_gencount == necp_kernel_socket_policies_gencount &&
+ inp->inp_policyresult.flowhash == flowhash) {
if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_DROP ||
- inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT ||
- (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && interface &&
- inp->inp_policyresult.results.result_parameter.tunnel_interface_index != verifyifindex) ||
- (inp->inp_policyresult.results.route_rule_id != 0 &&
- !necp_route_is_allowed(route, interface, inp->inp_policyresult.results.route_rule_id, &cellular_denied))) {
+ inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT ||
+ (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && interface &&
+ inp->inp_policyresult.results.result_parameter.tunnel_interface_index != verifyifindex) ||
+ (inp->inp_policyresult.results.route_rule_id != 0 &&
+ !necp_route_is_allowed(route, interface, inp->inp_policyresult.results.route_rule_id, &interface_type_denied))) {
allowed_to_receive = FALSE;
} else {
if (return_policy_id) {
if (return_route_rule_id) {
*return_route_rule_id = inp->inp_policyresult.results.route_rule_id;
}
+ if (return_skip_policy_id) {
+ *return_skip_policy_id = inp->inp_policyresult.skip_policy_id;
+ }
+ if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_PASS) {
+ pass_flags = inp->inp_policyresult.results.result_parameter.pass_flags;
+ }
+ }
+ lck_rw_done(&necp_kernel_policy_lock);
+ goto done;
+ }
+
+ u_int32_t route_rule_id_array[MAX_AGGREGATE_ROUTE_RULES];
+ size_t route_rule_id_array_count = 0;
+ struct necp_kernel_socket_policy *matched_policy = necp_socket_find_policy_match_with_info_locked(necp_kernel_socket_policies_map[NECP_SOCKET_MAP_APP_ID_TO_BUCKET(info.application_id)], &info, &filter_control_unit, route_rule_id_array, &route_rule_id_array_count, MAX_AGGREGATE_ROUTE_RULES, &service_action, &service, netagent_ids, NULL, NECP_MAX_NETAGENTS, NULL, 0, socket_proc ? socket_proc : current_proc(), pf_tag, return_skip_policy_id, inp->inp_route.ro_rt, &drop_dest_policy_result, &drop_all_bypass, &flow_divert_aggregate_unit);
+
+ // Check for loopback exception again after the policy match
+ if (bypass_type == NECP_BYPASS_TYPE_LOOPBACK &&
+ necp_pass_loopback == NECP_LOOPBACK_PASS_WITH_FILTER &&
+ (matched_policy == NULL || matched_policy->result != NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT)) {
+ // Polices have changed since last evaluation, update inp result with new filter state
+ if (inp->inp_policyresult.results.filter_control_unit != filter_control_unit) {
+ inp->inp_policyresult.results.filter_control_unit = filter_control_unit;
}
+ if (inp->inp_policyresult.results.flow_divert_aggregate_unit != flow_divert_aggregate_unit) {
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit;
+ }
+ allowed_to_receive = TRUE;
lck_rw_done(&necp_kernel_policy_lock);
goto done;
}
- struct necp_kernel_socket_policy *matched_policy = necp_socket_find_policy_match_with_info_locked(necp_kernel_socket_policies_map[NECP_SOCKET_MAP_APP_ID_TO_BUCKET(info.application_id)], &info, NULL, &route_rule_id, &service_action, &service, netagent_ids, NECP_MAX_NETAGENTS);
+ if (route_rule_id_array_count == 1) {
+ route_rule_id = route_rule_id_array[0];
+ } else if (route_rule_id_array_count > 1) {
+ route_rule_id = necp_create_aggregate_route_rule(route_rule_id_array);
+ }
+
+ bool send_local_network_denied_event = false;
if (matched_policy != NULL) {
+ if (matched_policy->result == NECP_KERNEL_POLICY_RESULT_DROP &&
+ matched_policy->result_parameter.drop_flags & NECP_KERNEL_POLICY_DROP_FLAG_LOCAL_NETWORK) {
+ // Trigger the event that we dropped due to a local network policy
+ send_local_network_denied_event = true;
+ }
+
if (matched_policy->result == NECP_KERNEL_POLICY_RESULT_DROP ||
- matched_policy->result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT ||
- (matched_policy->result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && interface &&
- matched_policy->result_parameter.tunnel_interface_index != verifyifindex) ||
- ((service_action == NECP_KERNEL_POLICY_RESULT_TRIGGER_SCOPED ||
- service_action == NECP_KERNEL_POLICY_RESULT_NO_TRIGGER_SCOPED) &&
- service.identifier != 0 && service.identifier != NECP_NULL_SERVICE_ID) ||
- (route_rule_id != 0 &&
- !necp_route_is_allowed(route, interface, route_rule_id, &cellular_denied)) ||
- !necp_netagents_allow_traffic(netagent_ids, NECP_MAX_NETAGENTS)) {
+ matched_policy->result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT ||
+ (matched_policy->result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && interface &&
+ matched_policy->result_parameter.tunnel_interface_index != verifyifindex) ||
+ ((service_action == NECP_KERNEL_POLICY_RESULT_TRIGGER_SCOPED ||
+ service_action == NECP_KERNEL_POLICY_RESULT_NO_TRIGGER_SCOPED) &&
+ service.identifier != 0 && service.identifier != NECP_NULL_SERVICE_ID) ||
+ (route_rule_id != 0 &&
+ !necp_route_is_allowed(route, interface, route_rule_id, &interface_type_denied)) ||
+ !necp_netagents_allow_traffic(netagent_ids, NECP_MAX_NETAGENTS)) {
allowed_to_receive = FALSE;
} else {
if (return_policy_id) {
if (return_route_rule_id) {
*return_route_rule_id = route_rule_id;
}
+ if (matched_policy->result == NECP_KERNEL_POLICY_RESULT_PASS) {
+ pass_flags = matched_policy->result_parameter.pass_flags;
+ }
+ // Polices has changed since last evaluation, update inp result with new filter state
+ if (inp->inp_policyresult.results.filter_control_unit != filter_control_unit) {
+ inp->inp_policyresult.results.filter_control_unit = filter_control_unit;
+ }
+ if (inp->inp_policyresult.results.flow_divert_aggregate_unit != flow_divert_aggregate_unit) {
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit;
+ }
}
- lck_rw_done(&necp_kernel_policy_lock);
if (necp_debug > 1 && matched_policy->id != inp->inp_policyresult.policy_id) {
NECPLOG(LOG_DEBUG, "Socket Send/Recv Policy: Policy %d Allowed %d", return_policy_id ? *return_policy_id : 0, allowed_to_receive);
}
- goto done;
- } else if (necp_drop_all_order > 0) {
+ } else {
+ bool drop_all = false;
+ if (necp_drop_all_order > 0 || info.drop_order > 0 || drop_dest_policy_result == NECP_KERNEL_POLICY_RESULT_DROP) {
+ drop_all = true;
+ if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) {
+ drop_all_bypass = necp_check_drop_all_bypass_result(socket_proc ? socket_proc : current_proc());
+ }
+ }
+ if (drop_all && drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) {
+ allowed_to_receive = FALSE;
+ } else {
+ if (return_policy_id) {
+ *return_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ }
+ if (return_route_rule_id) {
+ *return_route_rule_id = route_rule_id;
+ }
+
+ // Polices has changed since last evaluation, update inp result with new filter state
+ if (inp->inp_policyresult.results.filter_control_unit != filter_control_unit) {
+ inp->inp_policyresult.results.filter_control_unit = filter_control_unit;
+ }
+ if (inp->inp_policyresult.results.flow_divert_aggregate_unit != flow_divert_aggregate_unit) {
+ inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit;
+ }
+ }
+ }
+
+ if (necp_check_restricted_multicast_drop(socket_proc ? socket_proc : current_proc(), &info, true)) {
allowed_to_receive = FALSE;
}
lck_rw_done(&necp_kernel_policy_lock);
+ if (send_local_network_denied_event) {
+ necp_send_network_denied_event(((so->so_flags & SOF_DELEGATED) ? so->e_pid : so->last_pid),
+ ((so->so_flags & SOF_DELEGATED) ? so->e_uuid : so->last_uuid),
+ NETPOLICY_NETWORKTYPE_LOCAL);
+ }
+
done:
- if (!allowed_to_receive && cellular_denied) {
+ if (return_pass_flags != NULL) {
+ *return_pass_flags = pass_flags;
+ }
+
+ if (pf_tag != 0 && allowed_to_receive) {
+ allowed_to_receive = necp_packet_filter_tags_receive(pf_tag, pass_flags);
+ }
+
+ if (!allowed_to_receive && interface_type_denied != IFRTYPE_FUNCTIONAL_UNKNOWN) {
soevent(inp->inp_socket, (SO_FILT_HINT_LOCKED | SO_FILT_HINT_IFDENIED));
}
- return (allowed_to_receive);
+ if (socket_proc) {
+ proc_rele(socket_proc);
+ }
+
+ return allowed_to_receive;
}
bool
-necp_socket_is_allowed_to_send_recv_v4(struct inpcb *inp, u_int16_t local_port, u_int16_t remote_port, struct in_addr *local_addr, struct in_addr *remote_addr, ifnet_t interface, necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id)
+necp_socket_is_allowed_to_send_recv_v4(struct inpcb *inp, u_int16_t local_port, u_int16_t remote_port, struct in_addr *local_addr, struct in_addr *remote_addr, ifnet_t interface, u_int16_t pf_tag, necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id, necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags)
{
- struct sockaddr_in local;
- struct sockaddr_in remote;
+ struct sockaddr_in local = {};
+ struct sockaddr_in remote = {};
local.sin_family = remote.sin_family = AF_INET;
local.sin_len = remote.sin_len = sizeof(struct sockaddr_in);
local.sin_port = local_port;
memcpy(&local.sin_addr, local_addr, sizeof(local.sin_addr));
memcpy(&remote.sin_addr, remote_addr, sizeof(remote.sin_addr));
- return (necp_socket_is_allowed_to_send_recv_internal(inp, (struct sockaddr *)&local, (struct sockaddr *)&remote, interface, return_policy_id, return_route_rule_id));
+ return necp_socket_is_allowed_to_send_recv_internal(inp, (struct sockaddr *)&local, (struct sockaddr *)&remote, interface,
+ pf_tag, return_policy_id, return_route_rule_id, return_skip_policy_id, return_pass_flags);
}
bool
-necp_socket_is_allowed_to_send_recv_v6(struct inpcb *inp, u_int16_t local_port, u_int16_t remote_port, struct in6_addr *local_addr, struct in6_addr *remote_addr, ifnet_t interface, necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id)
+necp_socket_is_allowed_to_send_recv_v6(struct inpcb *inp, u_int16_t local_port, u_int16_t remote_port, struct in6_addr *local_addr, struct in6_addr *remote_addr, ifnet_t interface, u_int16_t pf_tag, necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id, necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags)
{
- struct sockaddr_in6 local;
- struct sockaddr_in6 remote;
+ struct sockaddr_in6 local = {};
+ struct sockaddr_in6 remote = {};
local.sin6_family = remote.sin6_family = AF_INET6;
local.sin6_len = remote.sin6_len = sizeof(struct sockaddr_in6);
local.sin6_port = local_port;
memcpy(&local.sin6_addr, local_addr, sizeof(local.sin6_addr));
memcpy(&remote.sin6_addr, remote_addr, sizeof(remote.sin6_addr));
- return (necp_socket_is_allowed_to_send_recv_internal(inp, (struct sockaddr *)&local, (struct sockaddr *)&remote, interface, return_policy_id, return_route_rule_id));
+ return necp_socket_is_allowed_to_send_recv_internal(inp, (struct sockaddr *)&local, (struct sockaddr *)&remote, interface,
+ pf_tag, return_policy_id, return_route_rule_id, return_skip_policy_id, return_pass_flags);
}
bool
-necp_socket_is_allowed_to_send_recv(struct inpcb *inp, necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id)
+necp_socket_is_allowed_to_send_recv(struct inpcb *inp, ifnet_t interface, u_int16_t pf_tag, necp_kernel_policy_id *return_policy_id,
+ u_int32_t *return_route_rule_id, necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags)
{
- return (necp_socket_is_allowed_to_send_recv_internal(inp, NULL, NULL, NULL, return_policy_id, return_route_rule_id));
+ return necp_socket_is_allowed_to_send_recv_internal(inp, NULL, NULL, interface, pf_tag,
+ return_policy_id, return_route_rule_id,
+ return_skip_policy_id, return_pass_flags);
}
int
-necp_mark_packet_from_socket(struct mbuf *packet, struct inpcb *inp, necp_kernel_policy_id policy_id, u_int32_t route_rule_id)
+necp_mark_packet_from_socket(struct mbuf *packet, struct inpcb *inp, necp_kernel_policy_id policy_id, u_int32_t route_rule_id,
+ necp_kernel_policy_id skip_policy_id, u_int32_t pass_flags)
{
- if (packet == NULL || inp == NULL) {
- return (EINVAL);
+ if (packet == NULL || inp == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return EINVAL;
}
// Mark ID for Pass and IP Tunnel
if (policy_id != NECP_KERNEL_POLICY_ID_NONE) {
packet->m_pkthdr.necp_mtag.necp_policy_id = policy_id;
} else if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_PASS ||
- inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL) {
+ inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL) {
packet->m_pkthdr.necp_mtag.necp_policy_id = inp->inp_policyresult.policy_id;
} else {
packet->m_pkthdr.necp_mtag.necp_policy_id = NECP_KERNEL_POLICY_ID_NONE;
} else {
packet->m_pkthdr.necp_mtag.necp_route_rule_id = inp->inp_policyresult.results.route_rule_id;
}
+ packet->m_pkthdr.necp_mtag.necp_app_id = (inp->inp_policyresult.app_id > UINT16_MAX ? (inp->inp_policyresult.app_id - UINT16_MAX) : inp->inp_policyresult.app_id);
+
+ if (skip_policy_id != NECP_KERNEL_POLICY_ID_NONE &&
+ skip_policy_id != NECP_KERNEL_POLICY_ID_NO_MATCH) {
+ // Only mark the skip policy if it is a valid policy ID
+ packet->m_pkthdr.necp_mtag.necp_skip_policy_id = skip_policy_id;
+ } else if (inp->inp_policyresult.results.filter_control_unit == NECP_FILTER_UNIT_NO_FILTER) {
+ // Overload the meaning of "NECP_KERNEL_POLICY_ID_NO_MATCH"
+ // to indicate that NECP_FILTER_UNIT_NO_FILTER was set
+ // See necp_get_skip_policy_id_from_packet() and
+ // necp_packet_should_skip_filters().
+ packet->m_pkthdr.necp_mtag.necp_skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH;
+ } else {
+ packet->m_pkthdr.necp_mtag.necp_skip_policy_id = NECP_KERNEL_POLICY_ID_NONE;
+ }
+
+ if (((pass_flags & NECP_KERNEL_POLICY_PASS_PF_TAG) == NECP_KERNEL_POLICY_PASS_PF_TAG) ||
+ ((inp->inp_policyresult.results.result_parameter.pass_flags & NECP_KERNEL_POLICY_PASS_PF_TAG) == NECP_KERNEL_POLICY_PASS_PF_TAG)) {
+ m_pftag(packet)->pftag_tag = PF_TAG_ID_SYSTEM_SERVICE;
+ }
- return (0);
+ return 0;
}
int
necp_mark_packet_from_ip(struct mbuf *packet, necp_kernel_policy_id policy_id)
{
- if (packet == NULL) {
- return (EINVAL);
+ if (packet == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return EINVAL;
}
// Mark ID for Pass and IP Tunnel
packet->m_pkthdr.necp_mtag.necp_policy_id = NECP_KERNEL_POLICY_ID_NONE;
}
- return (0);
+ return 0;
}
int
necp_mark_packet_from_interface(struct mbuf *packet, ifnet_t interface)
{
- if (packet == NULL) {
- return (EINVAL);
+ if (packet == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return EINVAL;
}
// Mark ID for Pass and IP Tunnel
packet->m_pkthdr.necp_mtag.necp_last_interface_index = interface->if_index;
}
- return (0);
+ return 0;
}
int
necp_mark_packet_as_keepalive(struct mbuf *packet, bool is_keepalive)
{
- if (packet == NULL) {
- return (EINVAL);
+ if (packet == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return EINVAL;
}
-
+
if (is_keepalive) {
packet->m_pkthdr.pkt_flags |= PKTF_KEEPALIVE;
} else {
packet->m_pkthdr.pkt_flags &= ~PKTF_KEEPALIVE;
}
-
- return (0);
+
+ return 0;
}
necp_kernel_policy_id
necp_get_policy_id_from_packet(struct mbuf *packet)
{
- if (packet == NULL) {
- return (NECP_KERNEL_POLICY_ID_NONE);
+ if (packet == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return NECP_KERNEL_POLICY_ID_NONE;
+ }
+
+ return packet->m_pkthdr.necp_mtag.necp_policy_id;
+}
+
+necp_kernel_policy_id
+necp_get_skip_policy_id_from_packet(struct mbuf *packet)
+{
+ if (packet == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return NECP_KERNEL_POLICY_ID_NONE;
+ }
+
+ // Check for overloaded value. See necp_mark_packet_from_socket().
+ if (packet->m_pkthdr.necp_mtag.necp_skip_policy_id == NECP_KERNEL_POLICY_ID_NO_MATCH) {
+ return NECP_KERNEL_POLICY_ID_NONE;
+ }
+
+ return packet->m_pkthdr.necp_mtag.necp_skip_policy_id;
+}
+
+u_int16_t
+necp_get_packet_filter_tags_from_packet(struct mbuf *packet)
+{
+ if (packet == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return 0;
}
-
- return (packet->m_pkthdr.necp_mtag.necp_policy_id);
+
+ return m_pftag(packet)->pftag_tag;
+}
+
+bool
+necp_packet_should_skip_filters(struct mbuf *packet)
+{
+ if (packet == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return false;
+ }
+
+ // Check for overloaded value. See necp_mark_packet_from_socket().
+ return packet->m_pkthdr.necp_mtag.necp_skip_policy_id == NECP_KERNEL_POLICY_ID_NO_MATCH;
}
u_int32_t
necp_get_last_interface_index_from_packet(struct mbuf *packet)
{
- if (packet == NULL) {
- return (0);
+ if (packet == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return 0;
}
- return (packet->m_pkthdr.necp_mtag.necp_last_interface_index);
+ return packet->m_pkthdr.necp_mtag.necp_last_interface_index;
}
u_int32_t
necp_get_route_rule_id_from_packet(struct mbuf *packet)
{
- if (packet == NULL) {
- return (0);
+ if (packet == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return 0;
+ }
+
+ return packet->m_pkthdr.necp_mtag.necp_route_rule_id;
+}
+
+int
+necp_get_app_uuid_from_packet(struct mbuf *packet,
+ uuid_t app_uuid)
+{
+ if (packet == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return EINVAL;
}
- return (packet->m_pkthdr.necp_mtag.necp_route_rule_id);
+ bool found_mapping = FALSE;
+ if (packet->m_pkthdr.necp_mtag.necp_app_id != 0) {
+ lck_rw_lock_shared(&necp_kernel_policy_lock);
+ necp_app_id app_id = (packet->m_pkthdr.necp_mtag.necp_app_id < UINT16_MAX ? (packet->m_pkthdr.necp_mtag.necp_app_id + UINT16_MAX) : packet->m_pkthdr.necp_mtag.necp_app_id);
+ struct necp_uuid_id_mapping *entry = necp_uuid_lookup_uuid_with_app_id_locked(app_id);
+ if (entry != NULL) {
+ uuid_copy(app_uuid, entry->uuid);
+ found_mapping = true;
+ }
+ lck_rw_done(&necp_kernel_policy_lock);
+ }
+ if (!found_mapping) {
+ uuid_clear(app_uuid);
+ }
+ return 0;
}
bool
necp_get_is_keepalive_from_packet(struct mbuf *packet)
{
- if (packet == NULL) {
- return (FALSE);
+ if (packet == NULL || !(packet->m_flags & M_PKTHDR)) {
+ return FALSE;
}
-
- return (packet->m_pkthdr.pkt_flags & PKTF_KEEPALIVE);
+
+ return packet->m_pkthdr.pkt_flags & PKTF_KEEPALIVE;
}
u_int32_t
necp_socket_get_content_filter_control_unit(struct socket *so)
{
struct inpcb *inp = sotoinpcb(so);
-
+
if (inp == NULL) {
- return (0);
+ return 0;
}
- return (inp->inp_policyresult.results.filter_control_unit);
+ return inp->inp_policyresult.results.filter_control_unit;
}
bool
necp_socket_should_use_flow_divert(struct inpcb *inp)
{
if (inp == NULL) {
- return (FALSE);
+ return FALSE;
}
- return (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT);
+ return !(inp->inp_socket->so_flags1 & SOF1_FLOW_DIVERT_SKIP) &&
+ (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT ||
+ (inp->inp_policyresult.results.flow_divert_aggregate_unit != 0));
}
u_int32_t
-necp_socket_get_flow_divert_control_unit(struct inpcb *inp)
+necp_socket_get_flow_divert_control_unit(struct inpcb *inp, uint32_t *aggregate_unit)
{
if (inp == NULL) {
- return (0);
+ return 0;
+ }
+
+ if (inp->inp_socket->so_flags1 & SOF1_FLOW_DIVERT_SKIP) {
+ return 0;
+ }
+
+ if (aggregate_unit != NULL &&
+ inp->inp_policyresult.results.flow_divert_aggregate_unit != 0) {
+ *aggregate_unit = inp->inp_policyresult.results.flow_divert_aggregate_unit;
}
if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT) {
- return (inp->inp_policyresult.results.result_parameter.flow_divert_control_unit);
+ return inp->inp_policyresult.results.result_parameter.flow_divert_control_unit;
}
- return (0);
+ return 0;
}
bool
necp_socket_should_rescope(struct inpcb *inp)
{
if (inp == NULL) {
- return (FALSE);
+ return FALSE;
}
-
- return (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED);
+
+ return inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED ||
+ inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SCOPED_DIRECT;
}
u_int
necp_socket_get_rescope_if_index(struct inpcb *inp)
{
if (inp == NULL) {
- return (0);
+ return 0;
}
-
+
if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED) {
- return (inp->inp_policyresult.results.result_parameter.scoped_interface_index);
+ return inp->inp_policyresult.results.result_parameter.scoped_interface_index;
+ } else if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SCOPED_DIRECT) {
+ return necp_get_primary_direct_interface_index();
}
-
- return (0);
+
+ return 0;
}
u_int32_t
necp_socket_get_effective_mtu(struct inpcb *inp, u_int32_t current_mtu)
{
if (inp == NULL) {
- return (current_mtu);
+ return current_mtu;
}
if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL &&
- (inp->inp_flags & INP_BOUND_IF) &&
- inp->inp_boundifp) {
-
+ (inp->inp_flags & INP_BOUND_IF) &&
+ inp->inp_boundifp) {
u_int bound_interface_index = inp->inp_boundifp->if_index;
u_int tunnel_interface_index = inp->inp_policyresult.results.result_parameter.tunnel_interface_index;
u_int32_t direct_tunnel_mtu = tunnel_interface->if_mtu;
u_int32_t delegate_tunnel_mtu = (tunnel_interface->if_delegated.ifp != NULL) ? tunnel_interface->if_delegated.ifp->if_mtu : 0;
if (delegate_tunnel_mtu != 0 &&
- strncmp(tunnel_interface->if_name, "ipsec", strlen("ipsec")) == 0) {
- // For ipsec interfaces, calculate the overhead from the delegate interface
- u_int32_t tunnel_overhead = (u_int32_t)(esp_hdrsiz(NULL) + sizeof(struct ip6_hdr));
- if (delegate_tunnel_mtu > tunnel_overhead) {
- delegate_tunnel_mtu -= tunnel_overhead;
- }
+ strncmp(tunnel_interface->if_name, "ipsec", strlen("ipsec")) == 0) {
+ // For ipsec interfaces, calculate the overhead from the delegate interface
+ u_int32_t tunnel_overhead = (u_int32_t)(esp_hdrsiz(NULL) + sizeof(struct ip6_hdr));
+ if (delegate_tunnel_mtu > tunnel_overhead) {
+ delegate_tunnel_mtu -= tunnel_overhead;
+ }
- if (delegate_tunnel_mtu < direct_tunnel_mtu) {
- // If the (delegate - overhead) < direct, return (delegate - overhead)
- return (delegate_tunnel_mtu);
- } else {
- // Otherwise return direct
- return (direct_tunnel_mtu);
- }
+ if (delegate_tunnel_mtu < direct_tunnel_mtu) {
+ // If the (delegate - overhead) < direct, return (delegate - overhead)
+ return delegate_tunnel_mtu;
+ } else {
+ // Otherwise return direct
+ return direct_tunnel_mtu;
+ }
} else {
// For non-ipsec interfaces, just return the tunnel MTU
- return (direct_tunnel_mtu);
+ return direct_tunnel_mtu;
}
}
}
}
// By default, just return the MTU passed in
- return (current_mtu);
+ return current_mtu;
}
ifnet_t
necp_get_ifnet_from_result_parameter(necp_kernel_policy_result_parameter *result_parameter)
{
if (result_parameter == NULL) {
- return (NULL);
+ return NULL;
}
- return (ifindex2ifnet[result_parameter->tunnel_interface_index]);
+ return ifindex2ifnet[result_parameter->tunnel_interface_index];
}
bool
int i;
if (packet == NULL || interface == NULL || new_route == NULL || (family != AF_INET && family != AF_INET6)) {
- return (FALSE);
+ return FALSE;
}
result = ifnet_get_address_list_family(interface, &addresses, family);
if (result != 0) {
NECPLOG(LOG_ERR, "Failed to get address list for %s%d", ifnet_name(interface), ifnet_unit(interface));
- return (FALSE);
+ return FALSE;
}
for (i = 0; addresses[i] != NULL; i++) {
done:
ifnet_free_address_list(addresses);
addresses = NULL;
- return (found_match);
+ return found_match;
}
static bool
necp_addr_is_loopback(struct sockaddr *address)
{
if (address == NULL) {
- return (FALSE);
+ return FALSE;
}
-
+
if (address->sa_family == AF_INET) {
- return (ntohl(((struct sockaddr_in *)(void *)address)->sin_addr.s_addr) == INADDR_LOOPBACK);
+ return ntohl(((struct sockaddr_in *)(void *)address)->sin_addr.s_addr) == INADDR_LOOPBACK;
} else if (address->sa_family == AF_INET6) {
return IN6_IS_ADDR_LOOPBACK(&((struct sockaddr_in6 *)(void *)address)->sin6_addr);
}
-
- return (FALSE);
+
+ return FALSE;
}
static bool
-necp_is_loopback(struct sockaddr *local_addr, struct sockaddr *remote_addr, struct inpcb *inp, struct mbuf *packet)
+necp_is_loopback(struct sockaddr *local_addr, struct sockaddr *remote_addr, struct inpcb *inp, struct mbuf *packet, u_int32_t bound_interface_index)
{
// Note: This function only checks for the loopback addresses.
// In the future, we may want to expand to also allow any traffic
// check is cheaper.
if (local_addr != NULL && necp_addr_is_loopback(local_addr)) {
- return (TRUE);
+ return TRUE;
}
-
+
if (remote_addr != NULL && necp_addr_is_loopback(remote_addr)) {
- return (TRUE);
+ return TRUE;
}
-
+
if (inp != NULL) {
if ((inp->inp_flags & INP_BOUND_IF) && inp->inp_boundifp && (inp->inp_boundifp->if_flags & IFF_LOOPBACK)) {
- return (TRUE);
+ return TRUE;
}
if (inp->inp_vflag & INP_IPV4) {
if (ntohl(inp->inp_laddr.s_addr) == INADDR_LOOPBACK ||
- ntohl(inp->inp_faddr.s_addr) == INADDR_LOOPBACK) {
- return (TRUE);
+ ntohl(inp->inp_faddr.s_addr) == INADDR_LOOPBACK) {
+ return TRUE;
}
} else if (inp->inp_vflag & INP_IPV6) {
if (IN6_IS_ADDR_LOOPBACK(&inp->in6p_laddr) ||
- IN6_IS_ADDR_LOOPBACK(&inp->in6p_faddr)) {
- return (TRUE);
+ IN6_IS_ADDR_LOOPBACK(&inp->in6p_faddr)) {
+ return TRUE;
}
}
+ } else if (bound_interface_index != IFSCOPE_NONE && lo_ifp->if_index == bound_interface_index) {
+ return TRUE;
}
-
+
if (packet != NULL) {
struct ip *ip = mtod(packet, struct ip *);
if (ip->ip_v == 4) {
if (ntohl(ip->ip_src.s_addr) == INADDR_LOOPBACK) {
- return (TRUE);
+ return TRUE;
}
if (ntohl(ip->ip_dst.s_addr) == INADDR_LOOPBACK) {
- return (TRUE);
+ return TRUE;
}
} else if (ip->ip_v == 6) {
struct ip6_hdr *ip6 = mtod(packet, struct ip6_hdr *);
if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src)) {
- return (TRUE);
+ return TRUE;
}
if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_dst)) {
- return (TRUE);
+ return TRUE;
+ }
+ }
+ }
+
+ return FALSE;
+}
+
+static bool
+necp_is_intcoproc(struct inpcb *inp, struct mbuf *packet)
+{
+ if (inp != NULL) {
+ if (!(inp->inp_vflag & INP_IPV6)) {
+ return false;
+ }
+ if (INP_INTCOPROC_ALLOWED(inp)) {
+ return true;
+ }
+ if ((inp->inp_flags & INP_BOUND_IF) &&
+ IFNET_IS_INTCOPROC(inp->inp_boundifp)) {
+ return true;
+ }
+ return false;
+ }
+ if (packet != NULL) {
+ struct ip6_hdr *ip6 = mtod(packet, struct ip6_hdr *);
+ if ((ip6->ip6_vfc & IPV6_VERSION_MASK) == IPV6_VERSION &&
+ IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst) &&
+ ip6->ip6_dst.s6_addr32[2] == ntohl(0xaede48ff) &&
+ ip6->ip6_dst.s6_addr32[3] == ntohl(0xfe334455)) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static bool
+necp_address_matches_drop_dest_policy(union necp_sockaddr_union *sau, u_int32_t session_order)
+{
+ char dest_str[MAX_IPv6_STR_LEN];
+
+ if (necp_drop_dest_debug > 0) {
+ if (sau->sa.sa_family == AF_INET) {
+ (void) inet_ntop(AF_INET, &sau->sin.sin_addr, dest_str, sizeof(dest_str));
+ } else if (sau->sa.sa_family == AF_INET6) {
+ (void) inet_ntop(AF_INET6, &sau->sin6.sin6_addr, dest_str, sizeof(dest_str));
+ } else {
+ dest_str[0] = 0;
+ }
+ }
+ for (u_int32_t i = 0; i < necp_drop_dest_policy.entry_count; i++) {
+ struct necp_drop_dest_entry *necp_drop_dest_entry = &necp_drop_dest_policy.entries[i];
+ struct necp_policy_condition_addr *npca = &necp_drop_dest_entry->cond_addr;
+
+ if (session_order >= necp_drop_dest_entry->order && necp_is_addr_in_subnet(&sau->sa, &npca->address.sa, npca->prefix)) {
+ if (necp_drop_dest_debug > 0) {
+ char subnet_str[MAX_IPv6_STR_LEN];
+ struct proc *p = current_proc();
+ pid_t pid = proc_pid(p);
+
+ if (sau->sa.sa_family == AF_INET) {
+ (void) inet_ntop(AF_INET, &npca->address.sin, subnet_str, sizeof(subnet_str));
+ os_log(OS_LOG_DEFAULT, "%s (process %s:%u) %s matches %s/%u", __func__, proc_best_name(p), pid, dest_str, subnet_str, npca->prefix);
+ } else if (sau->sa.sa_family == AF_INET6) {
+ (void) inet_ntop(AF_INET6, &npca->address.sin6, subnet_str, sizeof(subnet_str));
+ os_log(OS_LOG_DEFAULT, "%s (process %s:%u) %s matches %s/%u", __func__, proc_best_name(p), pid, dest_str, subnet_str, npca->prefix);
+ }
+ }
+ return true;
+ }
+ }
+ if (necp_drop_dest_debug > 1) {
+ struct proc *p = current_proc();
+ pid_t pid = proc_pid(p);
+
+ os_log(OS_LOG_DEFAULT, "%s (process %s:%u) %s no match", __func__, proc_best_name(p), pid, dest_str);
+ }
+ return false;
+}
+
+static int
+sysctl_handle_necp_drop_dest_level SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2, oidp)
+ int changed = 0;
+ int error = 0;
+ struct necp_drop_dest_policy tmp_drop_dest_policy;
+ struct proc *p = current_proc();
+ pid_t pid = proc_pid(p);
+
+ if (req->newptr != USER_ADDR_NULL && proc_suser(current_proc()) != 0 &&
+ priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_NECP_POLICIES, 0) != 0) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) not permitted", __func__, proc_best_name(p), pid);
+ return EPERM;
+ }
+ if (req->newptr != USER_ADDR_NULL && req->newlen != sizeof(struct necp_drop_dest_policy)) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) bad newlen %lu", __func__, proc_best_name(p), pid, req->newlen);
+ return EINVAL;
+ }
+
+ memcpy(&tmp_drop_dest_policy, &necp_drop_dest_policy, sizeof(struct necp_drop_dest_policy));
+ error = sysctl_io_opaque(req, &tmp_drop_dest_policy, sizeof(struct necp_drop_dest_policy), &changed);
+ if (error != 0) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) sysctl_io_opaque() error %d", __func__, proc_best_name(p), pid, error);
+ return error;
+ }
+ if (changed == 0 || req->newptr == USER_ADDR_NULL) {
+ return error;
+ }
+
+ //
+ // Validate the passed parameters
+ //
+ if (tmp_drop_dest_policy.entry_count >= MAX_NECP_DROP_DEST_LEVEL_ADDRS) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) bad entry_count %u", __func__, proc_best_name(p), pid, tmp_drop_dest_policy.entry_count);
+ return EINVAL;
+ }
+ for (u_int32_t i = 0; i < tmp_drop_dest_policy.entry_count; i++) {
+ struct necp_drop_dest_entry *tmp_drop_dest_entry = &tmp_drop_dest_policy.entries[i];
+ struct necp_policy_condition_addr *npca = &tmp_drop_dest_entry->cond_addr;
+
+ switch (tmp_drop_dest_entry->level) {
+ case NECP_SESSION_PRIORITY_UNKNOWN:
+ if (tmp_drop_dest_policy.entry_count != 0) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) NECP_SESSION_PRIORITY_UNKNOWN bad entry_count %u", __func__, proc_best_name(p), pid, tmp_drop_dest_policy.entry_count);
+ return EINVAL;
+ }
+ break;
+ case NECP_SESSION_PRIORITY_CONTROL:
+ case NECP_SESSION_PRIORITY_PRIVILEGED_TUNNEL:
+ case NECP_SESSION_PRIORITY_HIGH:
+ case NECP_SESSION_PRIORITY_HIGH_1:
+ case NECP_SESSION_PRIORITY_HIGH_2:
+ case NECP_SESSION_PRIORITY_HIGH_3:
+ case NECP_SESSION_PRIORITY_HIGH_4:
+ case NECP_SESSION_PRIORITY_HIGH_RESTRICTED:
+ case NECP_SESSION_PRIORITY_DEFAULT:
+ case NECP_SESSION_PRIORITY_LOW:
+ if (tmp_drop_dest_policy.entry_count == 0) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) priority %u entry_count 0", __func__, proc_best_name(p), pid, tmp_drop_dest_entry->level);
+ return EINVAL;
+ }
+ break;
+ default: {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) bad level %u", __func__, proc_best_name(p), pid, tmp_drop_dest_entry->level);
+ return EINVAL;
+ }
+ }
+
+ switch (npca->address.sa.sa_family) {
+ case AF_INET: {
+ if (npca->prefix > 32) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET bad prefix %u", __func__, proc_best_name(p), pid, npca->prefix);
+ return EINVAL;
+ }
+ if (npca->address.sin.sin_len != sizeof(struct sockaddr_in)) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET bad sin_len %u", __func__, proc_best_name(p), pid, npca->address.sin.sin_len);
+ return EINVAL;
+ }
+ if (npca->address.sin.sin_port != 0) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET bad sin_port %u, not zero", __func__, proc_best_name(p), pid, npca->address.sin.sin_port);
+ return EINVAL;
+ }
+ break;
+ }
+ case AF_INET6: {
+ if (npca->prefix > 128) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET6 bad prefix %u", __func__, proc_best_name(p), pid, npca->prefix);
+ return EINVAL;
}
+ if (npca->address.sin6.sin6_len != sizeof(struct sockaddr_in6)) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET6 bad sin6_len %u", __func__, proc_best_name(p), pid, npca->address.sin6.sin6_len);
+ return EINVAL;
+ }
+ if (npca->address.sin6.sin6_port != 0) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET6 bad sin6_port %u, not zero", __func__, proc_best_name(p), pid, npca->address.sin6.sin6_port);
+ return EINVAL;
+ }
+ if (npca->address.sin6.sin6_flowinfo != 0) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET6 bad sin6_flowinfo %u, not zero", __func__, proc_best_name(p), pid, npca->address.sin6.sin6_flowinfo);
+ return EINVAL;
+ }
+ if (npca->address.sin6.sin6_scope_id != 0) {
+ NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET6 bad sin6_scope_id %u, not zero", __func__, proc_best_name(p), pid, npca->address.sin6.sin6_scope_id);
+ return EINVAL;
+ }
+ break;
+ }
+ default: {
+ return EINVAL;
+ }
}
}
-
- return (FALSE);
+
+ //
+ // Commit the changed policy
+ //
+ lck_rw_lock_exclusive(&necp_kernel_policy_lock);
+ memset(&necp_drop_dest_policy, 0, sizeof(struct necp_drop_dest_policy));
+
+ necp_drop_dest_policy.entry_count = tmp_drop_dest_policy.entry_count;
+ for (u_int32_t i = 0; i < tmp_drop_dest_policy.entry_count; i++) {
+ struct necp_drop_dest_entry *tmp_drop_dest_entry = &tmp_drop_dest_policy.entries[i];
+ struct necp_drop_dest_entry *necp_drop_dest_entry = &necp_drop_dest_policy.entries[i];
+
+ memcpy(necp_drop_dest_entry, tmp_drop_dest_entry, sizeof(struct necp_drop_dest_entry));
+
+ necp_drop_dest_entry->order = necp_get_first_order_for_priority(necp_drop_dest_entry->level);
+ }
+ lck_rw_done(&necp_kernel_policy_lock);
+
+ return 0;
}
projects / apple / xnu.git / blobdiff