/*
- * Copyright (c) 2015-2016 Apple Inc. All rights reserved.
+ * Copyright (c) 2015-2018 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
*/
#include <string.h>
-#include <sys/systm.h>
-#include <sys/types.h>
-#include <sys/queue.h>
-#include <sys/malloc.h>
+
+#include <kern/thread_call.h>
+#include <kern/zalloc.h>
+
#include <libkern/OSMalloc.h>
-#include <sys/kernel.h>
+
#include <net/if.h>
-#include <sys/domain.h>
-#include <sys/protosw.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
+#include <net/if_var.h>
+#include <net/net_api_stats.h>
+#include <net/necp.h>
+#include <net/network_agent.h>
+#include <net/ntstat.h>
+
+#include <netinet/in_pcb.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
-#include <netinet/in_pcb.h>
-#include <net/if_var.h>
+#include <netinet/mp_pcb.h>
#include <netinet/tcp_cc.h>
-#include <net/ntstat.h>
-#include <sys/kauth.h>
-#include <sys/sysproto.h>
-#include <sys/priv.h>
-#include <net/network_agent.h>
-#include <net/necp.h>
+#include <netinet/tcp_fsm.h>
+#include <netinet/tcp_cache.h>
+#include <netinet6/in6_var.h>
+
+#include <sys/domain.h>
#include <sys/file_internal.h>
+#include <sys/kauth.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
#include <sys/poll.h>
-#include <kern/thread_call.h>
+#include <sys/priv.h>
+#include <sys/protosw.h>
+#include <sys/queue.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/sysproto.h>
+#include <sys/systm.h>
+#include <sys/types.h>
+#include <sys/codesign.h>
+#include <libkern/section_keywords.h>
+
/*
* NECP Client Architecture
static int noop_read(struct fileproc *, struct uio *, int, vfs_context_t);
static int noop_write(struct fileproc *, struct uio *, int, vfs_context_t);
static int noop_ioctl(struct fileproc *, unsigned long, caddr_t,
- vfs_context_t);
+ vfs_context_t);
static int necpop_select(struct fileproc *, int, void *, vfs_context_t);
static int necpop_close(struct fileglob *, vfs_context_t);
-static int necpop_kqfilter(struct fileproc *, struct knote *, vfs_context_t);
+static int necpop_kqfilter(struct fileproc *, struct knote *,
+ struct kevent_internal_s *kev, vfs_context_t);
// Timer functions
static int necp_timeout_microseconds = 1000 * 100; // 100ms
static int necp_timeout_leeway_microseconds = 1000 * 500; // 500ms
+
+static int necp_client_fd_count = 0;
+static int necp_observer_fd_count = 0;
+static int necp_client_count = 0;
+static int necp_socket_flow_count = 0;
+static int necp_if_flow_count = 0;
+static int necp_observer_message_limit = 256;
+
+SYSCTL_INT(_net_necp, NECPCTL_CLIENT_FD_COUNT, client_fd_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_client_fd_count, 0, "");
+SYSCTL_INT(_net_necp, NECPCTL_OBSERVER_FD_COUNT, observer_fd_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_observer_fd_count, 0, "");
+SYSCTL_INT(_net_necp, NECPCTL_CLIENT_COUNT, client_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_client_count, 0, "");
+SYSCTL_INT(_net_necp, NECPCTL_SOCKET_FLOW_COUNT, socket_flow_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_socket_flow_count, 0, "");
+SYSCTL_INT(_net_necp, NECPCTL_IF_FLOW_COUNT, if_flow_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_if_flow_count, 0, "");
+SYSCTL_INT(_net_necp, NECPCTL_OBSERVER_MESSAGE_LIMIT, observer_message_limit, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_observer_message_limit, 256, "");
+
+#define NECP_MAX_CLIENT_LIST_SIZE 1024 * 1024 // 1MB
+#define NECP_MAX_AGENT_ACTION_SIZE 256
+
extern int tvtohz(struct timeval *);
+extern unsigned int get_maxmtu(struct rtentry *);
// Parsed parameters
-#define NECP_PARSED_PARAMETERS_FIELD_LOCAL_ADDR 0x0001
-#define NECP_PARSED_PARAMETERS_FIELD_REMOTE_ADDR 0x0002
-#define NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IF 0x0004
-#define NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_IF 0x0008
-#define NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE 0x0010
-#define NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_IFTYPE 0x0020
-#define NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT 0x0040
-#define NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_AGENT 0x0080
-#define NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT 0x0100
-#define NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT_TYPE 0x0200
-#define NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_AGENT_TYPE 0x0400
-#define NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT_TYPE 0x0800
+#define NECP_PARSED_PARAMETERS_FIELD_LOCAL_ADDR 0x00001
+#define NECP_PARSED_PARAMETERS_FIELD_REMOTE_ADDR 0x00002
+#define NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IF 0x00004
+#define NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_IF 0x00008
+#define NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE 0x00010
+#define NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_IFTYPE 0x00020
+#define NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT 0x00040
+#define NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_AGENT 0x00080
+#define NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT 0x00100
+#define NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT 0x00200
+#define NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT_TYPE 0x00400
+#define NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_AGENT_TYPE 0x00800
+#define NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT_TYPE 0x01000
+#define NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT_TYPE 0x02000
+#define NECP_PARSED_PARAMETERS_FIELD_FLAGS 0x04000
+#define NECP_PARSED_PARAMETERS_FIELD_IP_PROTOCOL 0x08000
+#define NECP_PARSED_PARAMETERS_FIELD_EFFECTIVE_PID 0x10000
+#define NECP_PARSED_PARAMETERS_FIELD_EFFECTIVE_UUID 0x20000
+#define NECP_PARSED_PARAMETERS_FIELD_TRAFFIC_CLASS 0x40000
+#define NECP_PARSED_PARAMETERS_FIELD_LOCAL_PORT 0x80000
#define NECP_MAX_PARSED_PARAMETERS 16
struct necp_client_parsed_parameters {
u_int32_t valid_fields;
+ u_int32_t flags;
union necp_sockaddr_union local_addr;
union necp_sockaddr_union remote_addr;
u_int32_t required_interface_index;
char prohibited_interfaces[IFXNAMSIZ][NECP_MAX_PARSED_PARAMETERS];
- u_int8_t required_interface_types[NECP_MAX_PARSED_PARAMETERS];
+ u_int8_t required_interface_type;
u_int8_t prohibited_interface_types[NECP_MAX_PARSED_PARAMETERS];
struct necp_client_parameter_netagent_type required_netagent_types[NECP_MAX_PARSED_PARAMETERS];
struct necp_client_parameter_netagent_type prohibited_netagent_types[NECP_MAX_PARSED_PARAMETERS];
struct necp_client_parameter_netagent_type preferred_netagent_types[NECP_MAX_PARSED_PARAMETERS];
+ struct necp_client_parameter_netagent_type avoided_netagent_types[NECP_MAX_PARSED_PARAMETERS];
uuid_t required_netagents[NECP_MAX_PARSED_PARAMETERS];
uuid_t prohibited_netagents[NECP_MAX_PARSED_PARAMETERS];
uuid_t preferred_netagents[NECP_MAX_PARSED_PARAMETERS];
+ uuid_t avoided_netagents[NECP_MAX_PARSED_PARAMETERS];
+ u_int16_t ip_protocol;
+ pid_t effective_pid;
+ uuid_t effective_uuid;
+ u_int32_t traffic_class;
};
-static bool necp_find_matching_interface_index(struct necp_client_parsed_parameters *parsed_parameters, u_int *return_ifindex);
+static bool
+necp_find_matching_interface_index(struct necp_client_parsed_parameters *parsed_parameters,
+ u_int *return_ifindex, bool *validate_agents);
+
+static bool
+necp_ifnet_matches_local_address(struct ifnet *ifp, struct sockaddr *sa);
+
+static bool
+necp_ifnet_matches_parameters(struct ifnet *ifp,
+ struct necp_client_parsed_parameters *parsed_parameters,
+ u_int32_t *preferred_count,
+ bool secondary_interface);
static const struct fileops necp_fd_ops = {
.fo_type = DTYPE_NETPOLICY,
uuid_t asserted_netagent;
};
+struct necp_client_flow_header {
+ struct necp_tlv_header outer_header;
+ struct necp_tlv_header flow_id_tlv_header;
+ uuid_t flow_id;
+ struct necp_tlv_header flags_tlv_header;
+ u_int32_t flags_value;
+ struct necp_tlv_header interface_tlv_header;
+ struct necp_client_result_interface interface_value;
+} __attribute__((__packed__));
+
+struct necp_client_flow_protoctl_event_header {
+ struct necp_tlv_header protoctl_tlv_header;
+ struct necp_client_flow_protoctl_event protoctl_event;
+} __attribute__((__packed__));
+
+struct necp_client_nexus_flow_header {
+ struct necp_client_flow_header flow_header;
+ struct necp_tlv_header agent_tlv_header;
+ struct necp_client_result_netagent agent_value;
+ struct necp_tlv_header tfo_cookie_tlv_header;
+ u_int8_t tfo_cookie_value[NECP_TFO_COOKIE_LEN_MAX];
+} __attribute__((__packed__));
+
+
+struct necp_client_flow {
+ LIST_ENTRY(necp_client_flow) flow_chain;
+ unsigned invalid : 1;
+ unsigned nexus : 1; // If true, flow is a nexus; if false, flow is attached to socket
+ unsigned socket : 1;
+ unsigned viable : 1;
+ unsigned assigned : 1;
+ unsigned has_protoctl_event : 1;
+ unsigned check_tcp_heuristics : 1;
+ unsigned _reserved : 1;
+ union {
+ uuid_t nexus_agent;
+ struct {
+ void *socket_handle;
+ necp_client_flow_cb cb;
+ };
+ } u;
+ uint32_t interface_index;
+ uint16_t interface_flags;
+ uint32_t necp_flow_flags;
+ struct necp_client_flow_protoctl_event protoctl_event;
+ union necp_sockaddr_union local_addr;
+ union necp_sockaddr_union remote_addr;
+
+ size_t assigned_results_length;
+ u_int8_t *assigned_results;
+};
+
+struct necp_client_flow_registration {
+ RB_ENTRY(necp_client_flow_registration) fd_link;
+ RB_ENTRY(necp_client_flow_registration) global_link;
+ RB_ENTRY(necp_client_flow_registration) client_link;
+ LIST_ENTRY(necp_client_flow_registration) collect_stats_chain;
+ uuid_t registration_id;
+ u_int32_t flags;
+ unsigned flow_result_read : 1;
+ unsigned defunct : 1;
+ void *interface_handle;
+ necp_client_flow_cb interface_cb;
+ struct necp_client *client;
+ LIST_HEAD(_necp_registration_flow_list, necp_client_flow) flow_list;
+ u_int64_t last_interface_details __attribute__((aligned(sizeof(u_int64_t))));
+};
+
+static int necp_client_flow_id_cmp(struct necp_client_flow_registration *flow0, struct necp_client_flow_registration *flow1);
+
+RB_HEAD(_necp_client_flow_tree, necp_client_flow_registration);
+RB_PROTOTYPE_PREV(_necp_client_flow_tree, necp_client_flow_registration, client_link, necp_client_flow_id_cmp);
+RB_GENERATE_PREV(_necp_client_flow_tree, necp_client_flow_registration, client_link, necp_client_flow_id_cmp);
+
+#define NECP_CLIENT_INTERFACE_OPTION_STATIC_COUNT 4
+#define NECP_CLIENT_MAX_INTERFACE_OPTIONS 16
+
+#define NECP_CLIENT_INTERFACE_OPTION_EXTRA_COUNT (NECP_CLIENT_MAX_INTERFACE_OPTIONS - NECP_CLIENT_INTERFACE_OPTION_STATIC_COUNT)
+
struct necp_client {
- LIST_ENTRY(necp_client) chain;
+ RB_ENTRY(necp_client) link;
+ RB_ENTRY(necp_client) global_link;
+
+ decl_lck_mtx_data(, lock);
+ decl_lck_mtx_data(, route_lock);
+ uint32_t reference_count;
uuid_t client_id;
- bool result_read;
- bool assigned_result_read;
+ unsigned result_read : 1;
+ unsigned allow_multiple_flows : 1;
+ unsigned legacy_client_is_flow : 1;
+
+ unsigned background : 1;
+ unsigned background_update : 1;
+ unsigned platform_binary : 1;
size_t result_length;
u_int8_t result[NECP_MAX_CLIENT_RESULT_SIZE];
- uuid_t nexus_agent;
- size_t assigned_results_length;
- u_int8_t *assigned_results;
+ necp_policy_id policy_id;
+
+ u_int16_t ip_protocol;
+ int proc_pid;
+ struct _necp_client_flow_tree flow_registrations;
LIST_HEAD(_necp_client_assertion_list, necp_client_assertion) assertion_list;
- user_addr_t stats_uaddr;
- user_size_t stats_ulen;
- nstat_userland_context stats_handler_context;
- necp_stats_hdr *stats_area;
+ struct rtentry *current_route;
+
+ struct necp_client_interface_option interface_options[NECP_CLIENT_INTERFACE_OPTION_STATIC_COUNT];
+ struct necp_client_interface_option *extra_interface_options;
+ u_int8_t interface_option_count; // Number in interface_options + extra_interface_options
+
+ struct necp_client_result_netagent failed_trigger_agent;
+
+ void *agent_handle;
size_t parameters_length;
u_int8_t parameters[0];
};
+#define NECP_CLIENT_LOCK(_c) lck_mtx_lock(&_c->lock)
+#define NECP_CLIENT_UNLOCK(_c) lck_mtx_unlock(&_c->lock)
+#define NECP_CLIENT_ASSERT_LOCKED(_c) LCK_MTX_ASSERT(&_c->lock, LCK_MTX_ASSERT_OWNED)
+#define NECP_CLIENT_ASSERT_UNLOCKED(_c) LCK_MTX_ASSERT(&_c->lock, LCK_MTX_ASSERT_NOTOWNED)
+
+#define NECP_CLIENT_ROUTE_LOCK(_c) lck_mtx_lock(&_c->route_lock)
+#define NECP_CLIENT_ROUTE_UNLOCK(_c) lck_mtx_unlock(&_c->route_lock)
+
+static void necp_client_retain_locked(struct necp_client *client);
+static void necp_client_retain(struct necp_client *client);
+static bool necp_client_release_locked(struct necp_client *client);
+
+static void
+necp_client_add_assertion(struct necp_client *client, uuid_t netagent_uuid);
+
+static bool
+necp_client_remove_assertion(struct necp_client *client, uuid_t netagent_uuid);
+
+LIST_HEAD(_necp_flow_registration_list, necp_client_flow_registration);
+static struct _necp_flow_registration_list necp_collect_stats_flow_list;
+
+struct necp_flow_defunct {
+ LIST_ENTRY(necp_flow_defunct) chain;
+
+ uuid_t flow_id;
+ uuid_t nexus_agent;
+ void *agent_handle;
+ int proc_pid;
+};
+
+LIST_HEAD(_necp_flow_defunct_list, necp_flow_defunct);
+
+static int necp_client_id_cmp(struct necp_client *client0, struct necp_client *client1);
+
+RB_HEAD(_necp_client_tree, necp_client);
+RB_PROTOTYPE_PREV(_necp_client_tree, necp_client, link, necp_client_id_cmp);
+RB_GENERATE_PREV(_necp_client_tree, necp_client, link, necp_client_id_cmp);
+
+RB_HEAD(_necp_client_global_tree, necp_client);
+RB_PROTOTYPE_PREV(_necp_client_global_tree, necp_client, global_link, necp_client_id_cmp);
+RB_GENERATE_PREV(_necp_client_global_tree, necp_client, global_link, necp_client_id_cmp);
+
+RB_HEAD(_necp_fd_flow_tree, necp_client_flow_registration);
+RB_PROTOTYPE_PREV(_necp_fd_flow_tree, necp_client_flow_registration, fd_link, necp_client_flow_id_cmp);
+RB_GENERATE_PREV(_necp_fd_flow_tree, necp_client_flow_registration, fd_link, necp_client_flow_id_cmp);
+
+RB_HEAD(_necp_client_flow_global_tree, necp_client_flow_registration);
+RB_PROTOTYPE_PREV(_necp_client_flow_global_tree, necp_client_flow_registration, global_link, necp_client_flow_id_cmp);
+RB_GENERATE_PREV(_necp_client_flow_global_tree, necp_client_flow_registration, global_link, necp_client_flow_id_cmp);
+
+static struct _necp_client_global_tree necp_client_global_tree;
+static struct _necp_client_flow_global_tree necp_client_flow_global_tree;
+
+struct necp_client_update {
+ TAILQ_ENTRY(necp_client_update) chain;
+
+ uuid_t client_id;
+
+ size_t update_length;
+ struct necp_client_observer_update update;
+};
+
+
+#define NAIF_ATTACHED 0x1 // arena is attached to list
+#define NAIF_REDIRECT 0x2 // arena mmap has been redirected
+#define NAIF_DEFUNCT 0x4 // arena is now defunct
+
struct necp_fd_data {
+ u_int8_t necp_fd_type;
LIST_ENTRY(necp_fd_data) chain;
- LIST_HEAD(_clients, necp_client) clients;
+ struct _necp_client_tree clients;
+ struct _necp_fd_flow_tree flows;
+ TAILQ_HEAD(_necp_client_update_list, necp_client_update) update_list;
+ int update_count;
int flags;
int proc_pid;
decl_lck_mtx_data(, fd_lock);
struct selinfo si;
};
+#define NECP_FD_LOCK(_f) lck_mtx_lock(&_f->fd_lock)
+#define NECP_FD_UNLOCK(_f) lck_mtx_unlock(&_f->fd_lock)
+#define NECP_FD_ASSERT_LOCKED(_f) LCK_MTX_ASSERT(&_f->fd_lock, LCK_MTX_ASSERT_OWNED)
+#define NECP_FD_ASSERT_UNLOCKED(_f) LCK_MTX_ASSERT(&_f->fd_lock, LCK_MTX_ASSERT_NOTOWNED)
+
static LIST_HEAD(_necp_fd_list, necp_fd_data) necp_fd_list;
+static LIST_HEAD(_necp_fd_observer_list, necp_fd_data) necp_fd_observer_list;
+
+#define NECP_CLIENT_FD_ZONE_MAX 128
+#define NECP_CLIENT_FD_ZONE_NAME "necp.clientfd"
+
+static unsigned int necp_client_fd_size; /* size of zone element */
+static struct zone *necp_client_fd_zone; /* zone for necp_fd_data */
+
+#define NECP_FLOW_ZONE_NAME "necp.flow"
+#define NECP_FLOW_REGISTRATION_ZONE_NAME "necp.flowregistration"
+
+static unsigned int necp_flow_size; /* size of necp_client_flow */
+static struct mcache *necp_flow_cache; /* cache for necp_client_flow */
+
+static unsigned int necp_flow_registration_size; /* size of necp_client_flow_registration */
+static struct mcache *necp_flow_registration_cache; /* cache for necp_client_flow_registration */
+
+#define NECP_ARENA_INFO_ZONE_MAX 128
+#define NECP_ARENA_INFO_ZONE_NAME "necp.arenainfo"
+
static lck_grp_attr_t *necp_fd_grp_attr = NULL;
static lck_attr_t *necp_fd_mtx_attr = NULL;
static lck_grp_t *necp_fd_mtx_grp = NULL;
+
decl_lck_rw_data(static, necp_fd_lock);
+decl_lck_rw_data(static, necp_observer_lock);
+decl_lck_rw_data(static, necp_client_tree_lock);
+decl_lck_rw_data(static, necp_flow_tree_lock);
+decl_lck_rw_data(static, necp_collect_stats_list_lock);
+
+#define NECP_STATS_LIST_LOCK_EXCLUSIVE() lck_rw_lock_exclusive(&necp_collect_stats_list_lock)
+#define NECP_STATS_LIST_LOCK_SHARED() lck_rw_lock_shared(&necp_collect_stats_list_lock)
+#define NECP_STATS_LIST_UNLOCK() lck_rw_done(&necp_collect_stats_list_lock)
+
+#define NECP_CLIENT_TREE_LOCK_EXCLUSIVE() lck_rw_lock_exclusive(&necp_client_tree_lock)
+#define NECP_CLIENT_TREE_LOCK_SHARED() lck_rw_lock_shared(&necp_client_tree_lock)
+#define NECP_CLIENT_TREE_UNLOCK() lck_rw_done(&necp_client_tree_lock)
+#define NECP_CLIENT_TREE_ASSERT_LOCKED() LCK_RW_ASSERT(&necp_client_tree_lock, LCK_RW_ASSERT_HELD)
+
+#define NECP_FLOW_TREE_LOCK_EXCLUSIVE() lck_rw_lock_exclusive(&necp_flow_tree_lock)
+#define NECP_FLOW_TREE_LOCK_SHARED() lck_rw_lock_shared(&necp_flow_tree_lock)
+#define NECP_FLOW_TREE_UNLOCK() lck_rw_done(&necp_flow_tree_lock)
+#define NECP_FLOW_TREE_ASSERT_LOCKED() LCK_RW_ASSERT(&necp_flow_tree_lock, LCK_RW_ASSERT_HELD)
+
+#define NECP_FD_LIST_LOCK_EXCLUSIVE() lck_rw_lock_exclusive(&necp_fd_lock)
+#define NECP_FD_LIST_LOCK_SHARED() lck_rw_lock_shared(&necp_fd_lock)
+#define NECP_FD_LIST_UNLOCK() lck_rw_done(&necp_fd_lock)
+
+#define NECP_OBSERVER_LIST_LOCK_EXCLUSIVE() lck_rw_lock_exclusive(&necp_observer_lock)
+#define NECP_OBSERVER_LIST_LOCK_SHARED() lck_rw_lock_shared(&necp_observer_lock)
+#define NECP_OBSERVER_LIST_UNLOCK() lck_rw_done(&necp_observer_lock)
+
+// Locking Notes
+
+// Take NECP_FD_LIST_LOCK when accessing or modifying the necp_fd_list
+// Take NECP_CLIENT_TREE_LOCK when accessing or modifying the necp_client_global_tree
+// Take NECP_FLOW_TREE_LOCK when accessing or modifying the necp_client_flow_global_tree
+// Take NECP_STATS_LIST_LOCK when accessing or modifying the necp_collect_stats_flow_list
+// Take NECP_FD_LOCK when accessing or modifying an necp_fd_data entry
+// Take NECP_CLIENT_LOCK when accessing or modifying a single necp_client
+// Take NECP_CLIENT_ROUTE_LOCK when accessing or modifying a client's route
+
+// Precedence, where 1 is the first lock that must be taken
+// 1. NECP_FD_LIST_LOCK
+// 2. NECP_FD_LOCK (any)
+// 3. NECP_CLIENT_TREE_LOCK
+// 4. NECP_CLIENT_LOCK (any)
+// 5. NECP_FLOW_TREE_LOCK
+// 6. NECP_STATS_LIST_LOCK
+// 7. NECP_CLIENT_ROUTE_LOCK (any)
+
+static thread_call_t necp_client_update_tcall;
-static thread_call_t necp_client_tcall;
/// NECP file descriptor functions
struct selinfo *si = &fd_data->si;
if (!locked) {
- lck_mtx_lock(&fd_data->fd_lock);
+ NECP_FD_LOCK(fd_data);
}
selwakeup(si);
KNOTE(&si->si_note, 1); // notification
if (!locked) {
- lck_mtx_unlock(&fd_data->fd_lock);
+ NECP_FD_UNLOCK(fd_data);
}
}
+static inline bool
+necp_client_has_unread_flows(struct necp_client *client)
+{
+ NECP_CLIENT_ASSERT_LOCKED(client);
+ struct necp_client_flow_registration *flow_registration = NULL;
+ RB_FOREACH(flow_registration, _necp_client_flow_tree, &client->flow_registrations) {
+ if (!flow_registration->flow_result_read) {
+ return true;
+ }
+ }
+ return false;
+}
+
static int
necp_fd_poll(struct necp_fd_data *fd_data, int events, void *wql, struct proc *p, int is_kevent)
{
#pragma unused(wql, p, is_kevent)
u_int revents = 0;
- struct necp_client *client = NULL;
- bool has_unread_clients = FALSE;
u_int want_rx = events & (POLLIN | POLLRDNORM);
if (want_rx) {
+ if (fd_data->flags & NECP_OPEN_FLAG_PUSH_OBSERVER) {
+ // Push-mode observers are readable when they have a new update
+ if (!TAILQ_EMPTY(&fd_data->update_list)) {
+ revents |= want_rx;
+ }
+ } else {
+ // Standard fds are readable when some client is unread
+ struct necp_client *client = NULL;
+ bool has_unread_clients = FALSE;
+ RB_FOREACH(client, _necp_client_tree, &fd_data->clients) {
+ NECP_CLIENT_LOCK(client);
+ if (!client->result_read || necp_client_has_unread_flows(client)) {
+ has_unread_clients = TRUE;
+ }
+ NECP_CLIENT_UNLOCK(client);
+ if (has_unread_clients) {
+ break;
+ }
+ }
- LIST_FOREACH(client, &fd_data->clients, chain) {
- if (!client->result_read || !client->assigned_result_read) {
- has_unread_clients = TRUE;
- break;
+ if (has_unread_clients) {
+ revents |= want_rx;
}
}
+ }
+
+ return (revents);
+}
+
+static inline void
+necp_generate_client_id(uuid_t client_id, bool is_flow)
+{
+ uuid_generate_random(client_id);
+
+ if (is_flow) {
+ client_id[9] |= 0x01;
+ } else {
+ client_id[9] &= ~0x01;
+ }
+}
+
+static inline bool
+necp_client_id_is_flow(uuid_t client_id)
+{
+ return (client_id[9] & 0x01);
+}
+
+static struct necp_client *
+necp_find_client_and_lock(uuid_t client_id)
+{
+ NECP_CLIENT_TREE_ASSERT_LOCKED();
+
+ struct necp_client *client = NULL;
+
+ if (necp_client_id_is_flow(client_id)) {
+ NECP_FLOW_TREE_LOCK_SHARED();
+ struct necp_client_flow_registration find;
+ uuid_copy(find.registration_id, client_id);
+ struct necp_client_flow_registration *flow = RB_FIND(_necp_client_flow_global_tree, &necp_client_flow_global_tree, &find);
+ if (flow != NULL) {
+ client = flow->client;
+ }
+ NECP_FLOW_TREE_UNLOCK();
+ } else {
+ struct necp_client find;
+ uuid_copy(find.client_id, client_id);
+ client = RB_FIND(_necp_client_global_tree, &necp_client_global_tree, &find);
+ }
+
+ if (client != NULL) {
+ NECP_CLIENT_LOCK(client);
+ }
+
+ return (client);
+}
+
+static struct necp_client_flow_registration *
+necp_client_find_flow(struct necp_client *client, uuid_t flow_id)
+{
+ NECP_CLIENT_ASSERT_LOCKED(client);
+ struct necp_client_flow_registration *flow = NULL;
+
+ if (necp_client_id_is_flow(flow_id)) {
+ struct necp_client_flow_registration find;
+ uuid_copy(find.registration_id, flow_id);
+ flow = RB_FIND(_necp_client_flow_tree, &client->flow_registrations, &find);
+ } else {
+ flow = RB_ROOT(&client->flow_registrations);
+ }
+
+ return (flow);
+}
+
+static struct necp_client *
+necp_client_fd_find_client_unlocked(struct necp_fd_data *client_fd, uuid_t client_id)
+{
+ NECP_FD_ASSERT_LOCKED(client_fd);
+ struct necp_client *client = NULL;
- if (has_unread_clients) {
- revents |= want_rx;
+ if (necp_client_id_is_flow(client_id)) {
+ struct necp_client_flow_registration find;
+ uuid_copy(find.registration_id, client_id);
+ struct necp_client_flow_registration *flow = RB_FIND(_necp_fd_flow_tree, &client_fd->flows, &find);
+ if (flow != NULL) {
+ client = flow->client;
}
+ } else {
+ struct necp_client find;
+ uuid_copy(find.client_id, client_id);
+ client = RB_FIND(_necp_client_tree, &client_fd->clients, &find);
}
- return (revents);
+ return (client);
+}
+
+static struct necp_client *
+necp_client_fd_find_client_and_lock(struct necp_fd_data *client_fd, uuid_t client_id)
+{
+ struct necp_client *client = necp_client_fd_find_client_unlocked(client_fd, client_id);
+ if (client != NULL) {
+ NECP_CLIENT_LOCK(client);
+ }
+
+ return (client);
+}
+
+static inline int
+necp_client_id_cmp(struct necp_client *client0, struct necp_client *client1)
+{
+ return (uuid_compare(client0->client_id, client1->client_id));
+}
+
+static inline int
+necp_client_flow_id_cmp(struct necp_client_flow_registration *flow0, struct necp_client_flow_registration *flow1)
+{
+ return (uuid_compare(flow0->registration_id, flow1->registration_id));
}
static int
}
}
- lck_mtx_lock(&fd_data->fd_lock);
+ NECP_FD_LOCK(fd_data);
revents = necp_fd_poll(fd_data, events, wql, procp, 0);
- lck_mtx_unlock(&fd_data->fd_lock);
+ NECP_FD_UNLOCK(fd_data);
return ((events & revents) ? 1 : 0);
}
struct necp_fd_data *fd_data = (struct necp_fd_data *)kn->kn_hook;
struct selinfo *si = &fd_data->si;
- lck_mtx_lock(&fd_data->fd_lock);
+ NECP_FD_LOCK(fd_data);
KNOTE_DETACH(&si->si_note, kn);
- lck_mtx_unlock(&fd_data->fd_lock);
+ NECP_FD_UNLOCK(fd_data);
}
static int
fd_data = (struct necp_fd_data *)kn->kn_hook;
- lck_mtx_lock(&fd_data->fd_lock);
+ NECP_FD_LOCK(fd_data);
revents = necp_fd_poll(fd_data, POLLIN, NULL, current_proc(), 1);
res = ((revents & POLLIN) != 0);
if (res) {
*kev = kn->kn_kevent;
}
- lck_mtx_unlock(&fd_data->fd_lock);
+ NECP_FD_UNLOCK(fd_data);
return (res);
}
-static int
+static int
necp_fd_knrtouch(struct knote *kn, struct kevent_internal_s *kev)
{
#pragma unused(kev)
fd_data = (struct necp_fd_data *)kn->kn_hook;
- lck_mtx_lock(&fd_data->fd_lock);
- if ((kn->kn_status & KN_UDATA_SPECIFIC) == 0)
- kn->kn_udata = kev->udata;
+ NECP_FD_LOCK(fd_data);
revents = necp_fd_poll(fd_data, POLLIN, NULL, current_proc(), 1);
- lck_mtx_unlock(&fd_data->fd_lock);
+ NECP_FD_UNLOCK(fd_data);
return ((revents & POLLIN) != 0);
}
-struct filterops necp_fd_rfiltops = {
+SECURITY_READ_ONLY_EARLY(struct filterops) necp_fd_rfiltops = {
.f_isfd = 1,
.f_detach = necp_fd_knrdetach,
.f_event = necp_fd_knread,
};
static int
-necpop_kqfilter(struct fileproc *fp, struct knote *kn, vfs_context_t ctx)
+necpop_kqfilter(struct fileproc *fp, struct knote *kn,
+ __unused struct kevent_internal_s *kev, vfs_context_t ctx)
{
#pragma unused(fp, ctx)
struct necp_fd_data *fd_data = NULL;
return (0);
}
- lck_mtx_lock(&fd_data->fd_lock);
+ NECP_FD_LOCK(fd_data);
kn->kn_filtid = EVFILTID_NECP_FD;
kn->kn_hook = fd_data;
KNOTE_ATTACH(&fd_data->si.si_note, kn);
revents = necp_fd_poll(fd_data, POLLIN, NULL, current_proc(), 1);
- lck_mtx_unlock(&fd_data->fd_lock);
+ NECP_FD_UNLOCK(fd_data);
return ((revents & POLLIN) != 0);
}
-static void
-necp_destroy_client_stats(struct necp_client *client)
+#define INTERFACE_FLAGS_SHIFT 32
+#define INTERFACE_FLAGS_MASK 0xffff
+#define INTERFACE_INDEX_SHIFT 0
+#define INTERFACE_INDEX_MASK 0xffffffff
+
+static uint64_t
+combine_interface_details(uint32_t interface_index, uint16_t interface_flags)
{
- if ((client->stats_area != NULL) &&
- (client->stats_handler_context != NULL) &&
- (client->stats_uaddr != 0)) {
- // Close old stats if required.
- int error = copyin(client->stats_uaddr, client->stats_area, client->stats_ulen);
- if (error) {
- NECPLOG(LOG_ERR, "necp_destroy_client_stats copyin error on close (%d)", error);
- // Not much we can for an error on an obsolete address
- }
- ntstat_userland_stats_close(client->stats_handler_context);
- FREE(client->stats_area, M_NECP);
- client->stats_area = NULL;
- client->stats_handler_context = NULL;
- client->stats_uaddr = 0;
- client->stats_ulen = 0;
- }
+ return (((uint64_t)interface_flags & INTERFACE_FLAGS_MASK) << INTERFACE_FLAGS_SHIFT |
+ ((uint64_t)interface_index & INTERFACE_INDEX_MASK) << INTERFACE_INDEX_SHIFT);
}
+
static void
-necp_destroy_client(struct necp_client *client)
+necp_defunct_flow_registration(struct necp_client *client,
+ struct necp_client_flow_registration *flow_registration,
+ struct _necp_flow_defunct_list *defunct_list)
{
- // Remove from list
- LIST_REMOVE(client, chain);
+ NECP_CLIENT_ASSERT_LOCKED(client);
+
+ if (!flow_registration->defunct) {
+ bool needs_defunct = false;
+ struct necp_client_flow *search_flow = NULL;
+ LIST_FOREACH(search_flow, &flow_registration->flow_list, flow_chain) {
+ if (search_flow->nexus &&
+ !uuid_is_null(search_flow->u.nexus_agent)) {
+
+ // Save defunct values for the nexus
+ if (defunct_list != NULL) {
+ // Sleeping alloc won't fail; copy only what's necessary
+ struct necp_flow_defunct *flow_defunct = _MALLOC(sizeof (struct necp_flow_defunct),
+ M_NECP, M_WAITOK | M_ZERO);
+ uuid_copy(flow_defunct->nexus_agent, search_flow->u.nexus_agent);
+ uuid_copy(flow_defunct->flow_id, ((flow_registration->flags & NECP_CLIENT_FLOW_FLAGS_USE_CLIENT_ID) ?
+ client->client_id :
+ flow_registration->registration_id));
+ flow_defunct->proc_pid = client->proc_pid;
+ flow_defunct->agent_handle = client->agent_handle;
+
+ // Add to the list provided by caller
+ LIST_INSERT_HEAD(defunct_list, flow_defunct, chain);
+ }
- // Remove nexus assignment
- if (client->assigned_results != NULL) {
- if (!uuid_is_null(client->nexus_agent)) {
- int netagent_error = netagent_client_message(client->nexus_agent, client->client_id,
- NETAGENT_MESSAGE_TYPE_CLOSE_NEXUS);
- if (netagent_error != 0) {
- NECPLOG(LOG_ERR, "necp_client_remove close nexus error (%d)", netagent_error);
+ needs_defunct = true;
}
}
- FREE(client->assigned_results, M_NETAGENT);
- }
- // Remove agent assertions
- struct necp_client_assertion *search_assertion = NULL;
- struct necp_client_assertion *temp_assertion = NULL;
- LIST_FOREACH_SAFE(search_assertion, &client->assertion_list, assertion_chain, temp_assertion) {
- int netagent_error = netagent_client_message(search_assertion->asserted_netagent, client->client_id, NETAGENT_MESSAGE_TYPE_CLIENT_UNASSERT);
- if (netagent_error != 0) {
- NECPLOG(LOG_ERR, "necp_client_remove unassert agent error (%d)", netagent_error);
+ if (needs_defunct) {
+
+ // Only set defunct if there was some assigned flow
+ flow_registration->defunct = true;
}
- LIST_REMOVE(search_assertion, assertion_chain);
- FREE(search_assertion, M_NECP);
}
- necp_destroy_client_stats(client);
+}
- FREE(client, M_NECP);
+static void
+necp_defunct_client_for_policy(struct necp_client *client,
+ struct _necp_flow_defunct_list *defunct_list)
+{
+ NECP_CLIENT_ASSERT_LOCKED(client);
+
+ struct necp_client_flow_registration *flow_registration = NULL;
+ RB_FOREACH(flow_registration, _necp_client_flow_tree, &client->flow_registrations) {
+ necp_defunct_flow_registration(client, flow_registration, defunct_list);
+ }
}
-static int
-necpop_close(struct fileglob *fg, vfs_context_t ctx)
+static void
+necp_client_free(struct necp_client *client)
{
-#pragma unused(fg, ctx)
- struct necp_fd_data *fd_data = NULL;
- int error = 0;
+ NECP_CLIENT_ASSERT_LOCKED(client);
- fd_data = (struct necp_fd_data *)fg->fg_data;
- fg->fg_data = NULL;
+ NECP_CLIENT_UNLOCK(client);
- if (fd_data != NULL) {
- lck_rw_lock_exclusive(&necp_fd_lock);
+ FREE(client->extra_interface_options, M_NECP);
+ client->extra_interface_options = NULL;
- lck_mtx_lock(&fd_data->fd_lock);
- struct necp_client *client = NULL;
- struct necp_client *temp_client = NULL;
- LIST_FOREACH_SAFE(client, &fd_data->clients, chain, temp_client) {
- necp_destroy_client(client);
- }
- lck_mtx_unlock(&fd_data->fd_lock);
+ lck_mtx_destroy(&client->route_lock, necp_fd_mtx_grp);
+ lck_mtx_destroy(&client->lock, necp_fd_mtx_grp);
- selthreadclear(&fd_data->si);
+ FREE(client, M_NECP);
+}
- lck_mtx_destroy(&fd_data->fd_lock, necp_fd_mtx_grp);
+static void
+necp_client_retain_locked(struct necp_client *client)
+{
+ NECP_CLIENT_ASSERT_LOCKED(client);
- LIST_REMOVE(fd_data, chain);
+ client->reference_count++;
+ ASSERT(client->reference_count != 0);
+}
+
+static void
+necp_client_retain(struct necp_client *client)
+{
+ NECP_CLIENT_LOCK(client);
+ necp_client_retain_locked(client);
+ NECP_CLIENT_UNLOCK(client);
+}
- lck_rw_done(&necp_fd_lock);
+static bool
+necp_client_release_locked(struct necp_client *client)
+{
+ NECP_CLIENT_ASSERT_LOCKED(client);
- FREE(fd_data, M_NECP);
- fd_data = NULL;
+ uint32_t old_ref = client->reference_count;
+
+ ASSERT(client->reference_count != 0);
+ if (--client->reference_count == 0) {
+ necp_client_free(client);
}
- return (error);
+ return (old_ref == 1);
}
-/// NECP client utilities
-static int
-necp_find_fd_data(int fd, struct necp_fd_data **fd_data)
+static void
+necp_client_update_observer_add_internal(struct necp_fd_data *observer_fd, struct necp_client *client)
{
- proc_t p = current_proc();
- struct fileproc *fp = NULL;
- int error = 0;
+ NECP_FD_LOCK(observer_fd);
- proc_fdlock_spin(p);
- if ((error = fp_lookup(p, fd, &fp, 1)) != 0) {
- goto done;
+ if (observer_fd->update_count >= necp_observer_message_limit) {
+ NECP_FD_UNLOCK(observer_fd);
+ return;
}
- if (fp->f_fglob->fg_ops->fo_type != DTYPE_NETPOLICY) {
- fp_drop(p, fd, fp, 1);
- error = ENODEV;
- goto done;
+
+ struct necp_client_update *client_update = _MALLOC(sizeof(struct necp_client_update) + client->parameters_length,
+ M_NECP, M_WAITOK | M_ZERO);
+ if (client_update != NULL) {
+ client_update->update_length = sizeof(struct necp_client_observer_update) + client->parameters_length;
+ uuid_copy(client_update->client_id, client->client_id);
+ client_update->update.update_type = NECP_CLIENT_UPDATE_TYPE_PARAMETERS;
+ memcpy(client_update->update.tlv_buffer, client->parameters, client->parameters_length);
+ TAILQ_INSERT_TAIL(&observer_fd->update_list, client_update, chain);
+ observer_fd->update_count++;
+
+ necp_fd_notify(observer_fd, true);
}
- *fd_data = (struct necp_fd_data *)fp->f_fglob->fg_data;
-done:
- proc_fdunlock(p);
- return (error);
+ NECP_FD_UNLOCK(observer_fd);
}
-static bool
-necp_netagent_applies_to_client(__unused struct necp_client *client, struct necp_client_parsed_parameters *parameters, uuid_t netagent_uuid)
+static void
+necp_client_update_observer_update_internal(struct necp_fd_data *observer_fd, struct necp_client *client)
{
- bool applies = FALSE;
- u_int32_t flags = netagent_get_flags(netagent_uuid);
- if (!(flags & NETAGENT_FLAG_REGISTERED)) {
- // Unregistered agents never apply
- return (applies);
+ NECP_FD_LOCK(observer_fd);
+
+ if (observer_fd->update_count >= necp_observer_message_limit) {
+ NECP_FD_UNLOCK(observer_fd);
+ return;
}
- if (flags & NETAGENT_FLAG_SPECIFIC_USE_ONLY) {
+ struct necp_client_update *client_update = _MALLOC(sizeof(struct necp_client_update) + client->result_length,
+ M_NECP, M_WAITOK | M_ZERO);
+ if (client_update != NULL) {
+ client_update->update_length = sizeof(struct necp_client_observer_update) + client->result_length;
+ uuid_copy(client_update->client_id, client->client_id);
+ client_update->update.update_type = NECP_CLIENT_UPDATE_TYPE_RESULT;
+ memcpy(client_update->update.tlv_buffer, client->result, client->result_length);
+ TAILQ_INSERT_TAIL(&observer_fd->update_list, client_update, chain);
+ observer_fd->update_count++;
+
+ necp_fd_notify(observer_fd, true);
+ }
+
+ NECP_FD_UNLOCK(observer_fd);
+}
+
+static void
+necp_client_update_observer_remove_internal(struct necp_fd_data *observer_fd, struct necp_client *client)
+{
+ NECP_FD_LOCK(observer_fd);
+
+ if (observer_fd->update_count >= necp_observer_message_limit) {
+ NECP_FD_UNLOCK(observer_fd);
+ return;
+ }
+
+ struct necp_client_update *client_update = _MALLOC(sizeof(struct necp_client_update),
+ M_NECP, M_WAITOK | M_ZERO);
+ if (client_update != NULL) {
+ client_update->update_length = sizeof(struct necp_client_observer_update);
+ uuid_copy(client_update->client_id, client->client_id);
+ client_update->update.update_type = NECP_CLIENT_UPDATE_TYPE_REMOVE;
+ TAILQ_INSERT_TAIL(&observer_fd->update_list, client_update, chain);
+ observer_fd->update_count++;
+
+ necp_fd_notify(observer_fd, true);
+ }
+
+ NECP_FD_UNLOCK(observer_fd);
+}
+
+static void
+necp_client_update_observer_add(struct necp_client *client)
+{
+ NECP_OBSERVER_LIST_LOCK_SHARED();
+
+ if (LIST_EMPTY(&necp_fd_observer_list)) {
+ // No observers, bail
+ NECP_OBSERVER_LIST_UNLOCK();
+ return;
+ }
+
+ struct necp_fd_data *observer_fd = NULL;
+ LIST_FOREACH(observer_fd, &necp_fd_observer_list, chain) {
+ necp_client_update_observer_add_internal(observer_fd, client);
+ }
+
+ NECP_OBSERVER_LIST_UNLOCK();
+}
+
+static void
+necp_client_update_observer_update(struct necp_client *client)
+{
+ NECP_OBSERVER_LIST_LOCK_SHARED();
+
+ if (LIST_EMPTY(&necp_fd_observer_list)) {
+ // No observers, bail
+ NECP_OBSERVER_LIST_UNLOCK();
+ return;
+ }
+
+ struct necp_fd_data *observer_fd = NULL;
+ LIST_FOREACH(observer_fd, &necp_fd_observer_list, chain) {
+ necp_client_update_observer_update_internal(observer_fd, client);
+ }
+
+ NECP_OBSERVER_LIST_UNLOCK();
+}
+
+static void
+necp_client_update_observer_remove(struct necp_client *client)
+{
+ NECP_OBSERVER_LIST_LOCK_SHARED();
+
+ if (LIST_EMPTY(&necp_fd_observer_list)) {
+ // No observers, bail
+ NECP_OBSERVER_LIST_UNLOCK();
+ return;
+ }
+
+ struct necp_fd_data *observer_fd = NULL;
+ LIST_FOREACH(observer_fd, &necp_fd_observer_list, chain) {
+ necp_client_update_observer_remove_internal(observer_fd, client);
+ }
+
+ NECP_OBSERVER_LIST_UNLOCK();
+}
+
+static void
+necp_destroy_client_flow_registration(struct necp_client *client,
+ struct necp_client_flow_registration *flow_registration,
+ pid_t pid, bool abort)
+{
+ NECP_CLIENT_ASSERT_LOCKED(client);
+
+
+ struct necp_client_flow *search_flow = NULL;
+ struct necp_client_flow *temp_flow = NULL;
+ LIST_FOREACH_SAFE(search_flow, &flow_registration->flow_list, flow_chain, temp_flow) {
+ if (search_flow->nexus &&
+ !uuid_is_null(search_flow->u.nexus_agent)) {
+ // Note that if we had defuncted the client earlier, this would result in a harmless ENOENT
+ int netagent_error = netagent_client_message(search_flow->u.nexus_agent,
+ ((flow_registration->flags & NECP_CLIENT_FLOW_FLAGS_USE_CLIENT_ID) ?
+ client->client_id :
+ flow_registration->registration_id),
+ pid, client->agent_handle,
+ (abort ? NETAGENT_MESSAGE_TYPE_ABORT_NEXUS :
+ NETAGENT_MESSAGE_TYPE_CLOSE_NEXUS));
+ if (netagent_error != 0 && netagent_error != ENOENT) {
+ NECPLOG(LOG_ERR, "necp_client_remove close nexus error (%d)", netagent_error);
+ }
+ uuid_clear(search_flow->u.nexus_agent);
+ }
+ if (search_flow->assigned_results != NULL) {
+ FREE(search_flow->assigned_results, M_NETAGENT);
+ search_flow->assigned_results = NULL;
+ }
+ LIST_REMOVE(search_flow, flow_chain);
+ if (search_flow->socket) {
+ OSDecrementAtomic(&necp_socket_flow_count);
+ } else {
+ OSDecrementAtomic(&necp_if_flow_count);
+ }
+ mcache_free(necp_flow_cache, search_flow);
+ }
+
+ RB_REMOVE(_necp_client_flow_tree, &client->flow_registrations, flow_registration);
+ flow_registration->client = NULL;
+
+ mcache_free(necp_flow_registration_cache, flow_registration);
+}
+
+static void
+necp_destroy_client(struct necp_client *client, pid_t pid, bool abort)
+{
+ NECP_CLIENT_ASSERT_UNLOCKED(client);
+
+ necp_client_update_observer_remove(client);
+
+ NECP_CLIENT_LOCK(client);
+
+ // Free route
+ NECP_CLIENT_ROUTE_LOCK(client);
+ if (client->current_route != NULL) {
+ rtfree(client->current_route);
+ client->current_route = NULL;
+ }
+ NECP_CLIENT_ROUTE_UNLOCK(client);
+
+ // Remove flow assignments
+ struct necp_client_flow_registration *flow_registration = NULL;
+ struct necp_client_flow_registration *temp_flow_registration = NULL;
+ RB_FOREACH_SAFE(flow_registration, _necp_client_flow_tree, &client->flow_registrations, temp_flow_registration) {
+ necp_destroy_client_flow_registration(client, flow_registration, pid, abort);
+ }
+
+ // Remove agent assertions
+ struct necp_client_assertion *search_assertion = NULL;
+ struct necp_client_assertion *temp_assertion = NULL;
+ LIST_FOREACH_SAFE(search_assertion, &client->assertion_list, assertion_chain, temp_assertion) {
+ int netagent_error = netagent_client_message(search_assertion->asserted_netagent, client->client_id, pid,
+ client->agent_handle, NETAGENT_MESSAGE_TYPE_CLIENT_UNASSERT);
+ if (netagent_error != 0) {
+ NECPLOG((netagent_error == ENOENT ? LOG_DEBUG : LOG_ERR),
+ "necp_client_remove unassert agent error (%d)", netagent_error);
+ }
+ LIST_REMOVE(search_assertion, assertion_chain);
+ FREE(search_assertion, M_NECP);
+ }
+
+ if (!necp_client_release_locked(client)) {
+ NECP_CLIENT_UNLOCK(client);
+ }
+
+ OSDecrementAtomic(&necp_client_count);
+}
+
+static int
+necpop_close(struct fileglob *fg, vfs_context_t ctx)
+{
+#pragma unused(ctx)
+ struct necp_fd_data *fd_data = NULL;
+ int error = 0;
+
+ fd_data = (struct necp_fd_data *)fg->fg_data;
+ fg->fg_data = NULL;
+
+ if (fd_data != NULL) {
+ struct _necp_client_tree clients_to_close;
+ RB_INIT(&clients_to_close);
+
+ // Remove from list quickly
+ if (fd_data->flags & NECP_OPEN_FLAG_PUSH_OBSERVER) {
+ NECP_OBSERVER_LIST_LOCK_EXCLUSIVE();
+ LIST_REMOVE(fd_data, chain);
+ NECP_OBSERVER_LIST_UNLOCK();
+ } else {
+ NECP_FD_LIST_LOCK_EXCLUSIVE();
+ LIST_REMOVE(fd_data, chain);
+ NECP_FD_LIST_UNLOCK();
+ }
+
+ NECP_FD_LOCK(fd_data);
+ pid_t pid = fd_data->proc_pid;
+
+ struct necp_client_flow_registration *flow_registration = NULL;
+ struct necp_client_flow_registration *temp_flow_registration = NULL;
+ RB_FOREACH_SAFE(flow_registration, _necp_fd_flow_tree, &fd_data->flows, temp_flow_registration) {
+ NECP_FLOW_TREE_LOCK_EXCLUSIVE();
+ RB_REMOVE(_necp_client_flow_global_tree, &necp_client_flow_global_tree, flow_registration);
+ NECP_FLOW_TREE_UNLOCK();
+ RB_REMOVE(_necp_fd_flow_tree, &fd_data->flows, flow_registration);
+ }
+
+ struct necp_client *client = NULL;
+ struct necp_client *temp_client = NULL;
+ RB_FOREACH_SAFE(client, _necp_client_tree, &fd_data->clients, temp_client) {
+ NECP_CLIENT_TREE_LOCK_EXCLUSIVE();
+ RB_REMOVE(_necp_client_global_tree, &necp_client_global_tree, client);
+ NECP_CLIENT_TREE_UNLOCK();
+ RB_REMOVE(_necp_client_tree, &fd_data->clients, client);
+ RB_INSERT(_necp_client_tree, &clients_to_close, client);
+ }
+
+ struct necp_client_update *client_update = NULL;
+ struct necp_client_update *temp_update = NULL;
+ TAILQ_FOREACH_SAFE(client_update, &fd_data->update_list, chain, temp_update) {
+ // Flush pending updates
+ TAILQ_REMOVE(&fd_data->update_list, client_update, chain);
+ FREE(client_update, M_NECP);
+ }
+ fd_data->update_count = 0;
+
+
+ NECP_FD_UNLOCK(fd_data);
+
+ selthreadclear(&fd_data->si);
+
+ lck_mtx_destroy(&fd_data->fd_lock, necp_fd_mtx_grp);
+
+ if (fd_data->flags & NECP_OPEN_FLAG_PUSH_OBSERVER) {
+ OSDecrementAtomic(&necp_observer_fd_count);
+ } else {
+ OSDecrementAtomic(&necp_client_fd_count);
+ }
+
+ zfree(necp_client_fd_zone, fd_data);
+ fd_data = NULL;
+
+ RB_FOREACH_SAFE(client, _necp_client_tree, &clients_to_close, temp_client) {
+ RB_REMOVE(_necp_client_tree, &clients_to_close, client);
+ necp_destroy_client(client, pid, true);
+ }
+ }
+
+ return (error);
+}
+
+/// NECP client utilities
+
+static inline bool
+necp_address_is_wildcard(const union necp_sockaddr_union * const addr)
+{
+ return ((addr->sa.sa_family == AF_INET && addr->sin.sin_addr.s_addr == INADDR_ANY) ||
+ (addr->sa.sa_family == AF_INET6 && IN6_IS_ADDR_UNSPECIFIED(&addr->sin6.sin6_addr)));
+}
+
+static int
+necp_find_fd_data(int fd, struct necp_fd_data **fd_data)
+{
+ proc_t p = current_proc();
+ struct fileproc *fp = NULL;
+ int error = 0;
+
+ proc_fdlock_spin(p);
+ if ((error = fp_lookup(p, fd, &fp, 1)) != 0) {
+ goto done;
+ }
+ if (fp->f_fglob->fg_ops->fo_type != DTYPE_NETPOLICY) {
+ fp_drop(p, fd, fp, 1);
+ error = ENODEV;
+ goto done;
+ }
+ *fd_data = (struct necp_fd_data *)fp->f_fglob->fg_data;
+
+ if ((*fd_data)->necp_fd_type != necp_fd_type_client) {
+ // Not a client fd, ignore
+ error = EINVAL;
+ goto done;
+ }
+
+done:
+ proc_fdunlock(p);
+ return (error);
+}
+
+
+static struct necp_client_flow *
+necp_client_add_interface_flow(struct necp_client_flow_registration *flow_registration,
+ uint32_t interface_index)
+{
+ struct necp_client_flow *new_flow = mcache_alloc(necp_flow_cache, MCR_SLEEP);
+ if (new_flow == NULL) {
+ NECPLOG0(LOG_ERR, "Failed to allocate interface flow");
+ return NULL;
+ }
+
+ memset(new_flow, 0, sizeof(*new_flow));
+
+ // Neither nexus nor socket
+ new_flow->interface_index = interface_index;
+ new_flow->u.socket_handle = flow_registration->interface_handle;
+ new_flow->u.cb = flow_registration->interface_cb;
+
+ OSIncrementAtomic(&necp_if_flow_count);
+
+ LIST_INSERT_HEAD(&flow_registration->flow_list, new_flow, flow_chain);
+
+ return new_flow;
+}
+
+static struct necp_client_flow *
+necp_client_add_interface_flow_if_needed(struct necp_client *client,
+ struct necp_client_flow_registration *flow_registration,
+ uint32_t interface_index)
+{
+ if (!client->allow_multiple_flows ||
+ interface_index == IFSCOPE_NONE) {
+ // Interface not set, or client not allowed to use this mode
+ return NULL;
+ }
+
+ struct necp_client_flow *flow = NULL;
+ LIST_FOREACH(flow, &flow_registration->flow_list, flow_chain) {
+ if (!flow->nexus && !flow->socket && flow->interface_index == interface_index) {
+ // Already have the flow
+ flow->invalid = FALSE;
+ flow->u.socket_handle = flow_registration->interface_handle;
+ flow->u.cb = flow_registration->interface_cb;
+ return NULL;
+ }
+ }
+ return necp_client_add_interface_flow(flow_registration, interface_index);
+}
+
+static void
+necp_client_add_interface_option_if_needed(struct necp_client *client,
+ uint32_t interface_index,
+ uint32_t interface_generation,
+ uuid_t *nexus_agent)
+{
+ if (interface_index == IFSCOPE_NONE ||
+ (client->interface_option_count != 0 && !client->allow_multiple_flows)) {
+ // Interface not set, or client not allowed to use this mode
+ return;
+ }
+
+ if (client->interface_option_count >= NECP_CLIENT_MAX_INTERFACE_OPTIONS) {
+ // Cannot take any more interface options
+ return;
+ }
+
+ // Check if already present
+ for (u_int32_t option_i = 0; option_i < client->interface_option_count; option_i++) {
+ if (option_i < NECP_CLIENT_INTERFACE_OPTION_STATIC_COUNT) {
+ struct necp_client_interface_option *option = &client->interface_options[option_i];
+ if (option->interface_index == interface_index) {
+ if (nexus_agent == NULL) {
+ return;
+ }
+ if (uuid_compare(option->nexus_agent, *nexus_agent) == 0) {
+ return;
+ }
+ if (uuid_is_null(option->nexus_agent)) {
+ uuid_copy(option->nexus_agent, *nexus_agent);
+ return;
+ }
+ // If we get to this point, this is a new nexus flow
+ }
+ } else {
+ struct necp_client_interface_option *option = &client->extra_interface_options[option_i - NECP_CLIENT_INTERFACE_OPTION_STATIC_COUNT];
+ if (option->interface_index == interface_index) {
+ if (nexus_agent == NULL) {
+ return;
+ }
+ if (uuid_compare(option->nexus_agent, *nexus_agent) == 0) {
+ return;
+ }
+ if (uuid_is_null(option->nexus_agent)) {
+ uuid_copy(option->nexus_agent, *nexus_agent);
+ return;
+ }
+ // If we get to this point, this is a new nexus flow
+ }
+ }
+ }
+
+ // Add a new entry
+ if (client->interface_option_count < NECP_CLIENT_INTERFACE_OPTION_STATIC_COUNT) {
+ // Add to static
+ struct necp_client_interface_option *option = &client->interface_options[client->interface_option_count];
+ option->interface_index = interface_index;
+ option->interface_generation = interface_generation;
+ if (nexus_agent != NULL) {
+ uuid_copy(option->nexus_agent, *nexus_agent);
+ }
+ client->interface_option_count++;
+ } else {
+ // Add to extra
+ if (client->extra_interface_options == NULL) {
+ client->extra_interface_options = _MALLOC(sizeof(struct necp_client_interface_option) * NECP_CLIENT_INTERFACE_OPTION_EXTRA_COUNT, M_NECP, M_WAITOK | M_ZERO);
+ }
+ if (client->extra_interface_options != NULL) {
+ struct necp_client_interface_option *option = &client->extra_interface_options[client->interface_option_count - NECP_CLIENT_INTERFACE_OPTION_STATIC_COUNT];
+ option->interface_index = interface_index;
+ option->interface_generation = interface_generation;
+ if (nexus_agent != NULL) {
+ uuid_copy(option->nexus_agent, *nexus_agent);
+ }
+ client->interface_option_count++;
+ }
+ }
+}
+
+static bool
+necp_client_flow_is_viable(proc_t proc, struct necp_client *client,
+ struct necp_client_flow *flow)
+{
+ struct necp_aggregate_result result;
+ bool ignore_address = (client->allow_multiple_flows && !flow->nexus && !flow->socket);
+
+ flow->necp_flow_flags = 0;
+ int error = necp_application_find_policy_match_internal(proc, client->parameters,
+ (u_int32_t)client->parameters_length,
+ &result, &flow->necp_flow_flags,
+ flow->interface_index,
+ &flow->local_addr, &flow->remote_addr, NULL, ignore_address);
+
+ return (error == 0 &&
+ result.routed_interface_index != IFSCOPE_NONE &&
+ result.routing_result != NECP_KERNEL_POLICY_RESULT_DROP);
+}
+
+static void
+necp_flow_add_interface_flows(proc_t proc,
+ struct necp_client *client,
+ struct necp_client_flow_registration *flow_registration,
+ bool send_initial)
+{
+ // Traverse all interfaces and add a tracking flow if needed
+ for (u_int32_t option_i = 0; option_i < client->interface_option_count; option_i++) {
+ if (option_i < NECP_CLIENT_INTERFACE_OPTION_STATIC_COUNT) {
+ struct necp_client_interface_option *option = &client->interface_options[option_i];
+ struct necp_client_flow *flow = necp_client_add_interface_flow_if_needed(client, flow_registration, option->interface_index);
+ if (flow != NULL && send_initial) {
+ flow->viable = necp_client_flow_is_viable(proc, client, flow);
+ if (flow->viable && flow->u.cb) {
+ bool viable = flow->viable;
+ flow->u.cb(flow_registration->interface_handle, NECP_CLIENT_CBACTION_INITIAL, flow->interface_index, flow->necp_flow_flags, &viable);
+ flow->viable = viable;
+ }
+ }
+ } else {
+ struct necp_client_interface_option *option = &client->extra_interface_options[option_i - NECP_CLIENT_INTERFACE_OPTION_STATIC_COUNT];
+ struct necp_client_flow *flow = necp_client_add_interface_flow_if_needed(client, flow_registration, option->interface_index);
+ if (flow != NULL && send_initial) {
+ flow->viable = necp_client_flow_is_viable(proc, client, flow);
+ if (flow->viable && flow->u.cb) {
+ bool viable = flow->viable;
+ flow->u.cb(flow_registration->interface_handle, NECP_CLIENT_CBACTION_INITIAL, flow->interface_index, flow->necp_flow_flags, &viable);
+ flow->viable = viable;
+ }
+ }
+ }
+ }
+}
+
+static bool
+necp_client_update_flows(proc_t proc,
+ struct necp_client *client,
+ struct _necp_flow_defunct_list *defunct_list)
+{
+ NECP_CLIENT_ASSERT_LOCKED(client);
+
+ bool client_updated = FALSE;
+ struct necp_client_flow *flow = NULL;
+ struct necp_client_flow *temp_flow = NULL;
+ struct necp_client_flow_registration *flow_registration = NULL;
+ RB_FOREACH(flow_registration, _necp_client_flow_tree, &client->flow_registrations) {
+ if (flow_registration->interface_cb != NULL) {
+ // Add any interface flows that are not already tracked
+ necp_flow_add_interface_flows(proc, client, flow_registration, false);
+ }
+
+ LIST_FOREACH_SAFE(flow, &flow_registration->flow_list, flow_chain, temp_flow) {
+ // Check policy result for flow
+ int old_flags = flow->necp_flow_flags;
+ bool viable = necp_client_flow_is_viable(proc, client, flow);
+
+ // TODO: Defunct nexus flows that are blocked by policy
+
+ if (flow->viable != viable) {
+ flow->viable = viable;
+ client_updated = TRUE;
+ }
+
+ if ((old_flags & NECP_CLIENT_RESULT_FLAG_FORCE_UPDATE) !=
+ (flow->necp_flow_flags & NECP_CLIENT_RESULT_FLAG_FORCE_UPDATE)) {
+ client_updated = TRUE;
+ }
+
+ if (flow->viable && client_updated && (flow->socket || (!flow->socket && !flow->nexus)) && flow->u.cb) {
+ bool flow_viable = flow->viable;
+ flow->u.cb(flow->u.socket_handle, NECP_CLIENT_CBACTION_VIABLE, flow->interface_index, flow->necp_flow_flags, &viable);
+ flow->viable = flow_viable;
+ }
+
+ if (!flow->viable || flow->invalid) {
+ if (client_updated && (flow->socket || (!flow->socket && !flow->nexus)) && flow->u.cb) {
+ bool flow_viable = flow->viable;
+ flow->u.cb(flow->u.socket_handle, NECP_CLIENT_CBACTION_NONVIABLE, flow->interface_index, flow->necp_flow_flags, &viable);
+ flow->viable = flow_viable;
+ }
+ // The callback might change the viable-flag of the
+ // flow depending on its policy. Thus, we need to
+ // check the flags again after the callback.
+ }
+
+ (void)defunct_list;
+
+ // Handle flows that no longer match
+ if (!flow->viable || flow->invalid) {
+ // Drop them as long as they aren't assigned data
+ if (!flow->nexus && !flow->assigned) {
+ if (flow->assigned_results != NULL) {
+ FREE(flow->assigned_results, M_NETAGENT);
+ flow->assigned_results = NULL;
+ client_updated = TRUE;
+ }
+ LIST_REMOVE(flow, flow_chain);
+ if (flow->socket) {
+ OSDecrementAtomic(&necp_socket_flow_count);
+ } else {
+ OSDecrementAtomic(&necp_if_flow_count);
+ }
+ mcache_free(necp_flow_cache, flow);
+ }
+ }
+ }
+ }
+
+ return (client_updated);
+}
+
+static void
+necp_client_mark_all_nonsocket_flows_as_invalid(struct necp_client *client)
+{
+ struct necp_client_flow_registration *flow_registration = NULL;
+ struct necp_client_flow *flow = NULL;
+ RB_FOREACH(flow_registration, _necp_client_flow_tree, &client->flow_registrations) {
+ LIST_FOREACH(flow, &flow_registration->flow_list, flow_chain) {
+ if (!flow->socket) { // Socket flows are not marked as invalid
+ flow->invalid = TRUE;
+ }
+ }
+ }
+
+ // Reset option count every update
+ client->interface_option_count = 0;
+}
+
+static bool
+necp_netagent_applies_to_client(struct necp_client *client,
+ const struct necp_client_parsed_parameters *parameters,
+ uuid_t *netagent_uuid, bool allow_nexus,
+ uint32_t interface_index, uint32_t interface_generation)
+{
+#pragma unused(interface_index, interface_generation)
+ bool applies = FALSE;
+ u_int32_t flags = netagent_get_flags(*netagent_uuid);
+ if (!(flags & NETAGENT_FLAG_REGISTERED)) {
+ // Unregistered agents never apply
+ return (applies);
+ }
+
+ if (!allow_nexus &&
+ (flags & NETAGENT_FLAG_NEXUS_PROVIDER)) {
+ // Hide nexus providers unless allowed
+ // Direct interfaces and direct policies are allowed to use a nexus
+ // Delegate interfaces or re-scoped interfaces are not allowed
+ return (applies);
+ }
+
+ if (uuid_compare(client->failed_trigger_agent.netagent_uuid, *netagent_uuid) == 0) {
+ if (client->failed_trigger_agent.generation == netagent_get_generation(*netagent_uuid)) {
+ // If this agent was triggered, and failed, and hasn't changed, keep hiding it
+ return (applies);
+ } else {
+ // Mismatch generation, clear out old trigger
+ uuid_clear(client->failed_trigger_agent.netagent_uuid);
+ client->failed_trigger_agent.generation = 0;
+ }
+ }
+
+ if (flags & NETAGENT_FLAG_SPECIFIC_USE_ONLY) {
// Specific use agents only apply when required
bool required = FALSE;
if (parameters != NULL) {
if (uuid_is_null(parameters->required_netagents[i])) {
break;
}
- if (uuid_compare(parameters->required_netagents[i], netagent_uuid) == 0) {
- required = TRUE;
- break;
+ if (uuid_compare(parameters->required_netagents[i], *netagent_uuid) == 0) {
+ required = TRUE;
+ break;
+ }
+ }
+
+ if (!required) {
+ // Check required agent types
+ bool fetched_type = FALSE;
+ char netagent_domain[NETAGENT_DOMAINSIZE];
+ char netagent_type[NETAGENT_TYPESIZE];
+ memset(&netagent_domain, 0, NETAGENT_DOMAINSIZE);
+ memset(&netagent_type, 0, NETAGENT_TYPESIZE);
+
+ for (int i = 0; i < NECP_MAX_PARSED_PARAMETERS; i++) {
+ if (strlen(parameters->required_netagent_types[i].netagent_domain) == 0 ||
+ strlen(parameters->required_netagent_types[i].netagent_type) == 0) {
+ break;
+ }
+
+ if (!fetched_type) {
+ if (netagent_get_agent_domain_and_type(*netagent_uuid, netagent_domain, netagent_type)) {
+ fetched_type = TRUE;
+ } else {
+ break;
+ }
+ }
+
+ if ((strlen(parameters->required_netagent_types[i].netagent_domain) == 0 ||
+ strncmp(netagent_domain, parameters->required_netagent_types[i].netagent_domain, NETAGENT_DOMAINSIZE) == 0) &&
+ (strlen(parameters->required_netagent_types[i].netagent_type) == 0 ||
+ strncmp(netagent_type, parameters->required_netagent_types[i].netagent_type, NETAGENT_TYPESIZE) == 0)) {
+ required = TRUE;
+ break;
+ }
+ }
+ }
+ }
+
+ applies = required;
+ } else {
+ applies = TRUE;
+ }
+
+
+ return (applies);
+}
+
+static void
+necp_client_add_agent_interface_options(struct necp_client *client,
+ const struct necp_client_parsed_parameters *parsed_parameters,
+ ifnet_t ifp)
+{
+ if (ifp != NULL && ifp->if_agentids != NULL) {
+ for (u_int32_t i = 0; i < ifp->if_agentcount; i++) {
+ if (uuid_is_null(ifp->if_agentids[i])) {
+ continue;
+ }
+ // Relies on the side effect that nexus agents that apply will create flows
+ (void)necp_netagent_applies_to_client(client, parsed_parameters, &ifp->if_agentids[i], TRUE,
+ ifp->if_index, ifnet_get_generation(ifp));
+ }
+ }
+}
+
+static inline bool
+necp_client_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);
+ }
+}
+
+static int
+necp_client_parse_parameters(u_int8_t *parameters,
+ u_int32_t parameters_size,
+ struct necp_client_parsed_parameters *parsed_parameters)
+{
+ int error = 0;
+ size_t offset = 0;
+
+ u_int32_t num_prohibited_interfaces = 0;
+ u_int32_t num_prohibited_interface_types = 0;
+ u_int32_t num_required_agents = 0;
+ u_int32_t num_prohibited_agents = 0;
+ u_int32_t num_preferred_agents = 0;
+ u_int32_t num_avoided_agents = 0;
+ u_int32_t num_required_agent_types = 0;
+ u_int32_t num_prohibited_agent_types = 0;
+ u_int32_t num_preferred_agent_types = 0;
+ u_int32_t num_avoided_agent_types = 0;
+
+ if (parsed_parameters == NULL) {
+ return (EINVAL);
+ }
+
+ memset(parsed_parameters, 0, sizeof(struct necp_client_parsed_parameters));
+
+ while ((offset + sizeof(struct necp_tlv_header)) <= parameters_size) {
+ u_int8_t type = necp_buffer_get_tlv_type(parameters, offset);
+ u_int32_t length = necp_buffer_get_tlv_length(parameters, offset);
+
+ if (length > (parameters_size - (offset + sizeof(struct necp_tlv_header)))) {
+ // 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_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) {
+ parsed_parameters->required_interface_index = bound_interface->if_index;
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IF;
+ ifnet_release(bound_interface);
+ }
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_LOCAL_ADDRESS: {
+ if (length >= sizeof(struct necp_policy_condition_addr)) {
+ struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value;
+ if (necp_client_address_is_valid(&address_struct->address.sa)) {
+ memcpy(&parsed_parameters->local_addr, &address_struct->address, sizeof(address_struct->address));
+ if (!necp_address_is_wildcard(&parsed_parameters->local_addr)) {
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_LOCAL_ADDR;
+ }
+ if ((parsed_parameters->local_addr.sa.sa_family == AF_INET && parsed_parameters->local_addr.sin.sin_port) ||
+ (parsed_parameters->local_addr.sa.sa_family == AF_INET6 && parsed_parameters->local_addr.sin6.sin6_port)) {
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_LOCAL_PORT;
+ }
+ }
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_LOCAL_ENDPOINT: {
+ if (length >= sizeof(struct necp_client_endpoint)) {
+ struct necp_client_endpoint *endpoint = (struct necp_client_endpoint *)(void *)value;
+ if (necp_client_address_is_valid(&endpoint->u.sa)) {
+ memcpy(&parsed_parameters->local_addr, &endpoint->u.sa, sizeof(union necp_sockaddr_union));
+ if (!necp_address_is_wildcard(&parsed_parameters->local_addr)) {
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_LOCAL_ADDR;
+ }
+ if ((parsed_parameters->local_addr.sa.sa_family == AF_INET && parsed_parameters->local_addr.sin.sin_port) ||
+ (parsed_parameters->local_addr.sa.sa_family == AF_INET6 && parsed_parameters->local_addr.sin6.sin6_port)) {
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_LOCAL_PORT;
+ }
+ }
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_REMOTE_ADDRESS: {
+ if (length >= sizeof(struct necp_policy_condition_addr)) {
+ struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value;
+ if (necp_client_address_is_valid(&address_struct->address.sa)) {
+ memcpy(&parsed_parameters->remote_addr, &address_struct->address, sizeof(address_struct->address));
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REMOTE_ADDR;
+ }
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_REMOTE_ENDPOINT: {
+ if (length >= sizeof(struct necp_client_endpoint)) {
+ struct necp_client_endpoint *endpoint = (struct necp_client_endpoint *)(void *)value;
+ if (necp_client_address_is_valid(&endpoint->u.sa)) {
+ memcpy(&parsed_parameters->remote_addr, &endpoint->u.sa, sizeof(union necp_sockaddr_union));
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REMOTE_ADDR;
+ }
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_PROHIBIT_INTERFACE: {
+ if (num_prohibited_interfaces >= NECP_MAX_PARSED_PARAMETERS) {
+ break;
+ }
+ if (length <= IFXNAMSIZ && length > 0) {
+ memcpy(parsed_parameters->prohibited_interfaces[num_prohibited_interfaces], value, length);
+ parsed_parameters->prohibited_interfaces[num_prohibited_interfaces][length - 1] = 0; // Make sure the string is NULL terminated
+ num_prohibited_interfaces++;
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_IF;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_REQUIRE_IF_TYPE: {
+ if (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE) {
+ break;
+ }
+ if (length >= sizeof(u_int8_t)) {
+ memcpy(&parsed_parameters->required_interface_type, value, sizeof(u_int8_t));
+ if (parsed_parameters->required_interface_type) {
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE;
+ }
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_PROHIBIT_IF_TYPE: {
+ if (num_prohibited_interface_types >= NECP_MAX_PARSED_PARAMETERS) {
+ break;
+ }
+ if (length >= sizeof(u_int8_t)) {
+ memcpy(&parsed_parameters->prohibited_interface_types[num_prohibited_interface_types], value, sizeof(u_int8_t));
+ num_prohibited_interface_types++;
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_IFTYPE;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_REQUIRE_AGENT: {
+ if (num_required_agents >= NECP_MAX_PARSED_PARAMETERS) {
+ break;
+ }
+ if (length >= sizeof(uuid_t)) {
+ memcpy(&parsed_parameters->required_netagents[num_required_agents], value, sizeof(uuid_t));
+ num_required_agents++;
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_PROHIBIT_AGENT: {
+ if (num_prohibited_agents >= NECP_MAX_PARSED_PARAMETERS) {
+ break;
+ }
+ if (length >= sizeof(uuid_t)) {
+ memcpy(&parsed_parameters->prohibited_netagents[num_prohibited_agents], value, sizeof(uuid_t));
+ num_prohibited_agents++;
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_AGENT;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_PREFER_AGENT: {
+ if (num_preferred_agents >= NECP_MAX_PARSED_PARAMETERS) {
+ break;
+ }
+ if (length >= sizeof(uuid_t)) {
+ memcpy(&parsed_parameters->preferred_netagents[num_preferred_agents], value, sizeof(uuid_t));
+ num_preferred_agents++;
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_AVOID_AGENT: {
+ if (num_avoided_agents >= NECP_MAX_PARSED_PARAMETERS) {
+ break;
+ }
+ if (length >= sizeof(uuid_t)) {
+ memcpy(&parsed_parameters->avoided_netagents[num_avoided_agents], value, sizeof(uuid_t));
+ num_avoided_agents++;
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_REQUIRE_AGENT_TYPE: {
+ if (num_required_agent_types >= NECP_MAX_PARSED_PARAMETERS) {
+ break;
+ }
+ if (length >= sizeof(struct necp_client_parameter_netagent_type)) {
+ memcpy(&parsed_parameters->required_netagent_types[num_required_agent_types], value, sizeof(struct necp_client_parameter_netagent_type));
+ num_required_agent_types++;
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT_TYPE;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_PROHIBIT_AGENT_TYPE: {
+ if (num_prohibited_agent_types >= NECP_MAX_PARSED_PARAMETERS) {
+ break;
+ }
+ if (length >= sizeof(struct necp_client_parameter_netagent_type)) {
+ memcpy(&parsed_parameters->prohibited_netagent_types[num_prohibited_agent_types], value, sizeof(struct necp_client_parameter_netagent_type));
+ num_prohibited_agent_types++;
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_AGENT_TYPE;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_PREFER_AGENT_TYPE: {
+ if (num_preferred_agent_types >= NECP_MAX_PARSED_PARAMETERS) {
+ break;
+ }
+ if (length >= sizeof(struct necp_client_parameter_netagent_type)) {
+ memcpy(&parsed_parameters->preferred_netagent_types[num_preferred_agent_types], value, sizeof(struct necp_client_parameter_netagent_type));
+ num_preferred_agent_types++;
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT_TYPE;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_AVOID_AGENT_TYPE: {
+ if (num_avoided_agent_types >= NECP_MAX_PARSED_PARAMETERS) {
+ break;
+ }
+ if (length >= sizeof(struct necp_client_parameter_netagent_type)) {
+ memcpy(&parsed_parameters->avoided_netagent_types[num_avoided_agent_types], value, sizeof(struct necp_client_parameter_netagent_type));
+ num_avoided_agent_types++;
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT_TYPE;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_FLAGS: {
+ if (length >= sizeof(u_int32_t)) {
+ memcpy(&parsed_parameters->flags, value, sizeof(parsed_parameters->flags));
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_FLAGS;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_IP_PROTOCOL: {
+ if (length >= sizeof(parsed_parameters->ip_protocol)) {
+ memcpy(&parsed_parameters->ip_protocol, value, sizeof(parsed_parameters->ip_protocol));
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_IP_PROTOCOL;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_PID: {
+ if (length >= sizeof(parsed_parameters->effective_pid)) {
+ memcpy(&parsed_parameters->effective_pid, value, sizeof(parsed_parameters->effective_pid));
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_EFFECTIVE_PID;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_APPLICATION: {
+ if (length >= sizeof(parsed_parameters->effective_uuid)) {
+ memcpy(&parsed_parameters->effective_uuid, value, sizeof(parsed_parameters->effective_uuid));
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_EFFECTIVE_UUID;
+ }
+ break;
+ }
+ case NECP_CLIENT_PARAMETER_TRAFFIC_CLASS: {
+ if (length >= sizeof(parsed_parameters->traffic_class)) {
+ memcpy(&parsed_parameters->traffic_class, value, sizeof(parsed_parameters->traffic_class));
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_TRAFFIC_CLASS;
+ }
+ break;
+ }
+ default: {
+ break;
+ }
+ }
+ }
+ }
+
+ offset += sizeof(struct necp_tlv_header) + length;
+ }
+
+ return (error);
+}
+
+static int
+necp_client_parse_result(u_int8_t *result,
+ u_int32_t result_size,
+ union necp_sockaddr_union *local_address,
+ union necp_sockaddr_union *remote_address,
+ void **flow_stats)
+{
+#pragma unused(flow_stats)
+ int error = 0;
+ size_t offset = 0;
+
+ while ((offset + sizeof(struct necp_tlv_header)) <= result_size) {
+ u_int8_t type = necp_buffer_get_tlv_type(result, offset);
+ u_int32_t length = necp_buffer_get_tlv_length(result, offset);
+
+ if (length > 0 && (offset + sizeof(struct necp_tlv_header) + length) <= result_size) {
+ u_int8_t *value = necp_buffer_get_tlv_value(result, offset, NULL);
+ if (value != NULL) {
+ switch (type) {
+ case NECP_CLIENT_RESULT_LOCAL_ENDPOINT: {
+ if (length >= sizeof(struct necp_client_endpoint)) {
+ struct necp_client_endpoint *endpoint = (struct necp_client_endpoint *)(void *)value;
+ if (local_address != NULL && necp_client_address_is_valid(&endpoint->u.sa)) {
+ memcpy(local_address, &endpoint->u.sa, endpoint->u.sa.sa_len);
+ }
+ }
+ break;
+ }
+ case NECP_CLIENT_RESULT_REMOTE_ENDPOINT: {
+ if (length >= sizeof(struct necp_client_endpoint)) {
+ struct necp_client_endpoint *endpoint = (struct necp_client_endpoint *)(void *)value;
+ if (remote_address != NULL && necp_client_address_is_valid(&endpoint->u.sa)) {
+ memcpy(remote_address, &endpoint->u.sa, endpoint->u.sa.sa_len);
+ }
+ }
+ break;
+ }
+ default: {
+ break;
+ }
+ }
+ }
+ }
+
+ offset += sizeof(struct necp_tlv_header) + length;
+ }
+
+ return (error);
+}
+
+static struct necp_client_flow_registration *
+necp_client_create_flow_registration(struct necp_fd_data *fd_data, struct necp_client *client)
+{
+ NECP_FD_ASSERT_LOCKED(fd_data);
+ NECP_CLIENT_ASSERT_LOCKED(client);
+
+ struct necp_client_flow_registration *new_registration = mcache_alloc(necp_flow_registration_cache, MCR_SLEEP);
+ if (new_registration == NULL) {
+ return NULL;
+ }
+
+ memset(new_registration, 0, sizeof(*new_registration));
+
+ new_registration->last_interface_details = combine_interface_details(IFSCOPE_NONE, NSTAT_IFNET_IS_UNKNOWN_TYPE);
+
+ necp_generate_client_id(new_registration->registration_id, true);
+ LIST_INIT(&new_registration->flow_list);
+
+ // Add registration to client list
+ RB_INSERT(_necp_client_flow_tree, &client->flow_registrations, new_registration);
+
+ // Add registration to fd list
+ RB_INSERT(_necp_fd_flow_tree, &fd_data->flows, new_registration);
+
+ // Add registration to global tree for lookup
+ NECP_FLOW_TREE_LOCK_EXCLUSIVE();
+ RB_INSERT(_necp_client_flow_global_tree, &necp_client_flow_global_tree, new_registration);
+ NECP_FLOW_TREE_UNLOCK();
+
+ new_registration->client = client;
+
+ // Start out assuming there is nothing to read from the flow
+ new_registration->flow_result_read = true;
+
+ return new_registration;
+}
+
+static void
+necp_client_add_socket_flow(struct necp_client_flow_registration *flow_registration,
+ struct inpcb *inp)
+{
+ struct necp_client_flow *new_flow = mcache_alloc(necp_flow_cache, MCR_SLEEP);
+ if (new_flow == NULL) {
+ NECPLOG0(LOG_ERR, "Failed to allocate socket flow");
+ return;
+ }
+
+ memset(new_flow, 0, sizeof(*new_flow));
+
+ new_flow->socket = TRUE;
+ new_flow->u.socket_handle = inp;
+ new_flow->u.cb = inp->necp_cb;
+
+ OSIncrementAtomic(&necp_socket_flow_count);
+
+ LIST_INSERT_HEAD(&flow_registration->flow_list, new_flow, flow_chain);
+}
+
+int
+necp_client_register_socket_flow(pid_t pid, uuid_t client_id, struct inpcb *inp)
+{
+ int error = 0;
+ struct necp_fd_data *client_fd = NULL;
+ bool found_client = FALSE;
+
+ NECP_FD_LIST_LOCK_SHARED();
+ LIST_FOREACH(client_fd, &necp_fd_list, chain) {
+ NECP_FD_LOCK(client_fd);
+ struct necp_client *client = necp_client_fd_find_client_and_lock(client_fd, client_id);
+ if (client != NULL) {
+ if (!pid || client->proc_pid == pid) {
+ struct necp_client_flow_registration *flow_registration = necp_client_find_flow(client, client_id);
+ if (flow_registration != NULL) {
+ // Found the right client and flow registration, add a new flow
+ found_client = TRUE;
+ necp_client_add_socket_flow(flow_registration, inp);
+ } else if (RB_EMPTY(&client->flow_registrations) && !necp_client_id_is_flow(client_id)) {
+ // No flows yet on this client, add a new registration
+ flow_registration = necp_client_create_flow_registration(client_fd, client);
+ if (flow_registration == NULL) {
+ error = ENOMEM;
+ } else {
+ // Add a new flow
+ found_client = TRUE;
+ necp_client_add_socket_flow(flow_registration, inp);
+ }
+ }
+ }
+
+ NECP_CLIENT_UNLOCK(client);
+ }
+ NECP_FD_UNLOCK(client_fd);
+
+ if (found_client) {
+ break;
+ }
+ }
+ NECP_FD_LIST_UNLOCK();
+
+ if (!found_client) {
+ error = ENOENT;
+ } else {
+ // Count the sockets that have the NECP client UUID set
+ struct socket *so = inp->inp_socket;
+ if (!(so->so_flags1 & SOF1_HAS_NECP_CLIENT_UUID)) {
+ so->so_flags1 |= SOF1_HAS_NECP_CLIENT_UUID;
+ INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_necp_clientuuid_total);
+ }
+ }
+
+ return (error);
+}
+
+static void
+necp_client_add_multipath_interface_flows(struct necp_client_flow_registration *flow_registration,
+ struct necp_client *client,
+ struct mppcb *mpp)
+{
+ flow_registration->interface_handle = mpp;
+ flow_registration->interface_cb = mpp->necp_cb;
+
+ proc_t proc = proc_find(client->proc_pid);
+ if (proc == PROC_NULL) {
+ return;
+ }
+
+ // Traverse all interfaces and add a tracking flow if needed
+ necp_flow_add_interface_flows(proc, client, flow_registration, true);
+
+ proc_rele(proc);
+ proc = PROC_NULL;
+}
+
+int
+necp_client_register_multipath_cb(pid_t pid, uuid_t client_id, struct mppcb *mpp)
+{
+ int error = 0;
+ struct necp_fd_data *client_fd = NULL;
+ bool found_client = FALSE;
+
+ NECP_FD_LIST_LOCK_SHARED();
+ LIST_FOREACH(client_fd, &necp_fd_list, chain) {
+ NECP_FD_LOCK(client_fd);
+ struct necp_client *client = necp_client_fd_find_client_and_lock(client_fd, client_id);
+ if (client != NULL) {
+ if (!pid || client->proc_pid == pid) {
+ struct necp_client_flow_registration *flow_registration = necp_client_find_flow(client, client_id);
+ if (flow_registration != NULL) {
+ // Found the right client and flow registration, add a new flow
+ found_client = TRUE;
+ necp_client_add_multipath_interface_flows(flow_registration, client, mpp);
+ } else if (RB_EMPTY(&client->flow_registrations) && !necp_client_id_is_flow(client_id)) {
+ // No flows yet on this client, add a new registration
+ flow_registration = necp_client_create_flow_registration(client_fd, client);
+ if (flow_registration == NULL) {
+ error = ENOMEM;
+ } else {
+ // Add a new flow
+ found_client = TRUE;
+ necp_client_add_multipath_interface_flows(flow_registration, client, mpp);
+ }
}
}
- if (!required) {
- // Check required agent types
- bool fetched_type = FALSE;
- char netagent_domain[NETAGENT_DOMAINSIZE];
- char netagent_type[NETAGENT_TYPESIZE];
- memset(&netagent_domain, 0, NETAGENT_DOMAINSIZE);
- memset(&netagent_type, 0, NETAGENT_TYPESIZE);
+ NECP_CLIENT_UNLOCK(client);
+ }
+ NECP_FD_UNLOCK(client_fd);
+
+ if (found_client) {
+ break;
+ }
+ }
+ NECP_FD_LIST_UNLOCK();
+
+ if (!found_client && error == 0) {
+ error = ENOENT;
+ }
+
+ return (error);
+}
+
+#define NETAGENT_DOMAIN_RADIO_MANAGER "WirelessRadioManager"
+#define NETAGENT_TYPE_RADIO_MANAGER "WirelessRadioManager:BB Manager"
+
+static int
+necp_client_lookup_bb_radio_manager(struct necp_client *client,
+ uuid_t netagent_uuid)
+{
+ char netagent_domain[NETAGENT_DOMAINSIZE];
+ char netagent_type[NETAGENT_TYPESIZE];
+ struct necp_aggregate_result result;
+ proc_t proc;
+ int error;
+
+ proc = proc_find(client->proc_pid);
+ if (proc == PROC_NULL) {
+ return ESRCH;
+ }
+
+ error = necp_application_find_policy_match_internal(proc, client->parameters, (u_int32_t)client->parameters_length,
+ &result, NULL, 0, NULL, NULL, NULL, true);
- for (int i = 0; i < NECP_MAX_PARSED_PARAMETERS; i++) {
- if (strlen(parameters->required_netagent_types[i].netagent_domain) == 0 ||
- strlen(parameters->required_netagent_types[i].netagent_type) == 0) {
- break;
- }
+ proc_rele(proc);
+ proc = PROC_NULL;
- if (!fetched_type) {
- if (netagent_get_agent_domain_and_type(netagent_uuid, netagent_domain, netagent_type)) {
- fetched_type = TRUE;
- } else {
- break;
- }
- }
+ if (error) {
+ return error;
+ }
- if ((strlen(parameters->required_netagent_types[i].netagent_domain) == 0 ||
- strncmp(netagent_domain, parameters->required_netagent_types[i].netagent_domain, NETAGENT_DOMAINSIZE) == 0) &&
- (strlen(parameters->required_netagent_types[i].netagent_type) == 0 ||
- strncmp(netagent_type, parameters->required_netagent_types[i].netagent_type, NETAGENT_TYPESIZE) == 0)) {
- required = TRUE;
- break;
- }
- }
- }
+ for (int i = 0; i < NECP_MAX_NETAGENTS; i++) {
+ if (uuid_is_null(result.netagents[i])) {
+ // Passed end of valid agents
+ break;
}
- applies = required;
+ memset(&netagent_domain, 0, NETAGENT_DOMAINSIZE);
+ memset(&netagent_type, 0, NETAGENT_TYPESIZE);
+ if (netagent_get_agent_domain_and_type(result.netagents[i], netagent_domain, netagent_type) == FALSE) {
+ continue;
+ }
+
+ if (strncmp(netagent_domain, NETAGENT_DOMAIN_RADIO_MANAGER, NETAGENT_DOMAINSIZE) != 0) {
+ continue;
+ }
+
+ if (strncmp(netagent_type, NETAGENT_TYPE_RADIO_MANAGER, NETAGENT_TYPESIZE) != 0) {
+ continue;
+ }
+
+ uuid_copy(netagent_uuid, result.netagents[i]);
+
+ break;
+ }
+
+ return 0;
+}
+
+static int
+necp_client_assert_bb_radio_manager_common(struct necp_client *client, bool assert)
+{
+ uuid_t netagent_uuid;
+ uint8_t assert_type;
+ int error;
+
+ error = necp_client_lookup_bb_radio_manager(client, netagent_uuid);
+ if (error) {
+ NECPLOG0(LOG_ERR, "BB radio manager agent not found");
+ return error;
+ }
+
+ // Before unasserting, verify that the assertion was already taken
+ if (assert == FALSE) {
+ assert_type = NETAGENT_MESSAGE_TYPE_CLIENT_UNASSERT;
+
+ if (!necp_client_remove_assertion(client, netagent_uuid)) {
+ return EINVAL;
+ }
} else {
- applies = TRUE;
+ assert_type = NETAGENT_MESSAGE_TYPE_CLIENT_ASSERT;
}
- if (applies &&
- (flags & NETAGENT_FLAG_NEXUS_PROVIDER) &&
- uuid_is_null(client->nexus_agent)) {
- uuid_copy(client->nexus_agent, netagent_uuid);
+ error = netagent_client_message(netagent_uuid, client->client_id, client->proc_pid, client->agent_handle, assert_type);
+ if (error) {
+ NECPLOG0(LOG_ERR, "netagent_client_message failed");
+ return error;
}
- return (applies);
+ // Only save the assertion if the action succeeded
+ if (assert == TRUE) {
+ necp_client_add_assertion(client, netagent_uuid);
+ }
+
+ return 0;
}
-static int
-necp_client_parse_parameters(u_int8_t *parameters,
- u_int32_t parameters_size,
- struct necp_client_parsed_parameters *parsed_parameters)
+int
+necp_client_assert_bb_radio_manager(uuid_t client_id, bool assert)
{
+ struct necp_client *client;
int error = 0;
- size_t offset = 0;
- u_int32_t num_prohibited_interfaces = 0;
- u_int32_t num_required_interface_types = 0;
- u_int32_t num_prohibited_interface_types = 0;
- u_int32_t num_required_agents = 0;
- u_int32_t num_prohibited_agents = 0;
- u_int32_t num_preferred_agents = 0;
- u_int32_t num_required_agent_types = 0;
- u_int32_t num_prohibited_agent_types = 0;
- u_int32_t num_preferred_agent_types = 0;
+ NECP_CLIENT_TREE_LOCK_SHARED();
- if (parsed_parameters == NULL) {
- return (EINVAL);
+ client = necp_find_client_and_lock(client_id);
+
+ if (client) {
+ // Found the right client!
+ error = necp_client_assert_bb_radio_manager_common(client, assert);
+
+ NECP_CLIENT_UNLOCK(client);
+ } else {
+ NECPLOG0(LOG_ERR, "Couldn't find client");
+ error = ENOENT;
}
- memset(parsed_parameters, 0, sizeof(struct necp_client_parsed_parameters));
+ NECP_CLIENT_TREE_UNLOCK();
- while ((offset + sizeof(u_int8_t) + sizeof(u_int32_t)) <= parameters_size) {
- u_int8_t type = necp_buffer_get_tlv_type(parameters, offset);
- u_int32_t length = necp_buffer_get_tlv_length(parameters, offset);
+ return (error);
+}
- if (length > 0 && (offset + sizeof(u_int8_t) + sizeof(u_int32_t) + length) <= parameters_size) {
- u_int8_t *value = necp_buffer_get_tlv_value(parameters, offset, NULL);
- if (value != NULL) {
- switch (type) {
- 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) {
- parsed_parameters->required_interface_index = bound_interface->if_index;
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IF;
- ifnet_release(bound_interface);
- }
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_LOCAL_ADDRESS: {
- if (length >= sizeof(struct necp_policy_condition_addr)) {
- struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value;
- if ((address_struct->address.sa.sa_family == AF_INET ||
- address_struct->address.sa.sa_family == AF_INET6) &&
- address_struct->address.sa.sa_len <= length) {
- memcpy(&parsed_parameters->local_addr, &address_struct->address, sizeof(address_struct->address));
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_LOCAL_ADDR;
- }
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_LOCAL_ENDPOINT: {
- 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_INET ||
- endpoint->u.endpoint.endpoint_family == AF_INET6) &&
- endpoint->u.endpoint.endpoint_length <= length) {
- memcpy(&parsed_parameters->local_addr, &endpoint->u.sa, sizeof(union necp_sockaddr_union));
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_LOCAL_ADDR;
- }
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_REMOTE_ADDRESS: {
- if (length >= sizeof(struct necp_policy_condition_addr)) {
- struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value;
- if ((address_struct->address.sa.sa_family == AF_INET ||
- address_struct->address.sa.sa_family == AF_INET6) &&
- address_struct->address.sa.sa_len <= length) {
- memcpy(&parsed_parameters->remote_addr, &address_struct->address, sizeof(address_struct->address));
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REMOTE_ADDR;
- }
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_REMOTE_ENDPOINT: {
- 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_INET ||
- endpoint->u.endpoint.endpoint_family == AF_INET6) &&
- endpoint->u.endpoint.endpoint_length <= length) {
- memcpy(&parsed_parameters->remote_addr, &endpoint->u.sa, sizeof(union necp_sockaddr_union));
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REMOTE_ADDR;
- }
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_PROHIBIT_INTERFACE: {
- if (num_prohibited_interfaces >= NECP_MAX_PARSED_PARAMETERS) {
- break;
- }
- if (length <= IFXNAMSIZ && length > 0) {
- memcpy(parsed_parameters->prohibited_interfaces[num_prohibited_interfaces], value, length);
- parsed_parameters->prohibited_interfaces[num_prohibited_interfaces][length - 1] = 0; // Make sure the string is NULL terminated
- num_prohibited_interfaces++;
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_IF;
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_REQUIRE_IF_TYPE: {
- if (num_required_interface_types >= NECP_MAX_PARSED_PARAMETERS) {
- break;
- }
- if (length >= sizeof(u_int8_t)) {
- memcpy(&parsed_parameters->required_interface_types[num_required_interface_types], value, sizeof(u_int8_t));
- num_required_interface_types++;
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE;
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_PROHIBIT_IF_TYPE: {
- if (num_prohibited_interface_types >= NECP_MAX_PARSED_PARAMETERS) {
- break;
- }
- if (length >= sizeof(u_int8_t)) {
- memcpy(&parsed_parameters->prohibited_interface_types[num_prohibited_interface_types], value, sizeof(u_int8_t));
- num_prohibited_interface_types++;
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_IFTYPE;
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_REQUIRE_AGENT: {
- if (num_required_agents >= NECP_MAX_PARSED_PARAMETERS) {
- break;
- }
- if (length >= sizeof(uuid_t)) {
- memcpy(&parsed_parameters->required_netagents[num_required_agents], value, sizeof(uuid_t));
- num_required_agents++;
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT;
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_PROHIBIT_AGENT: {
- if (num_prohibited_agents >= NECP_MAX_PARSED_PARAMETERS) {
- break;
- }
- if (length >= sizeof(uuid_t)) {
- memcpy(&parsed_parameters->prohibited_netagents[num_prohibited_agents], value, sizeof(uuid_t));
- num_prohibited_agents++;
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_AGENT;
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_PREFER_AGENT: {
- if (num_preferred_agents >= NECP_MAX_PARSED_PARAMETERS) {
- break;
- }
- if (length >= sizeof(uuid_t)) {
- memcpy(&parsed_parameters->preferred_netagents[num_preferred_agents], value, sizeof(uuid_t));
- num_preferred_agents++;
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT;
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_REQUIRE_AGENT_TYPE: {
- if (num_required_agent_types >= NECP_MAX_PARSED_PARAMETERS) {
- break;
- }
- if (length >= sizeof(struct necp_client_parameter_netagent_type)) {
- memcpy(&parsed_parameters->required_netagent_types[num_required_agent_types], value, sizeof(struct necp_client_parameter_netagent_type));
- num_required_agent_types++;
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT_TYPE;
+static int
+necp_client_unregister_socket_flow(uuid_t client_id, void *handle)
+{
+ int error = 0;
+ struct necp_fd_data *client_fd = NULL;
+ bool found_client = FALSE;
+ bool client_updated = FALSE;
+
+ NECP_FD_LIST_LOCK_SHARED();
+ LIST_FOREACH(client_fd, &necp_fd_list, chain) {
+ NECP_FD_LOCK(client_fd);
+
+ struct necp_client *client = necp_client_fd_find_client_and_lock(client_fd, client_id);
+ if (client != NULL) {
+ struct necp_client_flow_registration *flow_registration = necp_client_find_flow(client, client_id);
+ if (flow_registration != NULL) {
+ // Found the right client and flow!
+ found_client = TRUE;
+
+ // Remove flow assignment
+ struct necp_client_flow *search_flow = NULL;
+ struct necp_client_flow *temp_flow = NULL;
+ LIST_FOREACH_SAFE(search_flow, &flow_registration->flow_list, flow_chain, temp_flow) {
+ if (search_flow->socket && search_flow->u.socket_handle == handle) {
+ if (search_flow->assigned_results != NULL) {
+ FREE(search_flow->assigned_results, M_NETAGENT);
+ search_flow->assigned_results = NULL;
}
- break;
+ client_updated = TRUE;
+ flow_registration->flow_result_read = FALSE;
+ LIST_REMOVE(search_flow, flow_chain);
+ OSDecrementAtomic(&necp_socket_flow_count);
+ mcache_free(necp_flow_cache, search_flow);
}
- case NECP_CLIENT_PARAMETER_PROHIBIT_AGENT_TYPE: {
- if (num_prohibited_agent_types >= NECP_MAX_PARSED_PARAMETERS) {
- break;
+ }
+ }
+
+ NECP_CLIENT_UNLOCK(client);
+ }
+
+ if (client_updated) {
+ necp_fd_notify(client_fd, true);
+ }
+ NECP_FD_UNLOCK(client_fd);
+
+ if (found_client) {
+ break;
+ }
+ }
+ NECP_FD_LIST_UNLOCK();
+
+ if (!found_client) {
+ error = ENOENT;
+ }
+
+ return (error);
+}
+
+static int
+necp_client_unregister_multipath_cb(uuid_t client_id, void *handle)
+{
+ int error = 0;
+ bool found_client = FALSE;
+
+ NECP_CLIENT_TREE_LOCK_SHARED();
+
+ struct necp_client *client = necp_find_client_and_lock(client_id);
+ if (client != NULL) {
+ struct necp_client_flow_registration *flow_registration = necp_client_find_flow(client, client_id);
+ if (flow_registration != NULL) {
+ // Found the right client and flow!
+ found_client = TRUE;
+
+ // Remove flow assignment
+ struct necp_client_flow *search_flow = NULL;
+ struct necp_client_flow *temp_flow = NULL;
+ LIST_FOREACH_SAFE(search_flow, &flow_registration->flow_list, flow_chain, temp_flow) {
+ if (!search_flow->socket && !search_flow->nexus &&
+ search_flow->u.socket_handle == handle) {
+ search_flow->u.socket_handle = NULL;
+ search_flow->u.cb = NULL;
+ }
+ }
+
+ flow_registration->interface_handle = NULL;
+ flow_registration->interface_cb = NULL;
+ }
+
+ NECP_CLIENT_UNLOCK(client);
+ }
+
+ NECP_CLIENT_TREE_UNLOCK();
+
+ if (!found_client) {
+ error = ENOENT;
+ }
+
+ return (error);
+}
+
+int
+necp_client_assign_from_socket(pid_t pid, uuid_t client_id, struct inpcb *inp)
+{
+ int error = 0;
+ struct necp_fd_data *client_fd = NULL;
+ bool found_client = FALSE;
+ bool client_updated = FALSE;
+
+ NECP_FD_LIST_LOCK_SHARED();
+ LIST_FOREACH(client_fd, &necp_fd_list, chain) {
+ if (pid && client_fd->proc_pid != pid) {
+ continue;
+ }
+
+ proc_t proc = proc_find(client_fd->proc_pid);
+ if (proc == PROC_NULL) {
+ continue;
+ }
+
+ NECP_FD_LOCK(client_fd);
+
+ struct necp_client *client = necp_client_fd_find_client_and_lock(client_fd, client_id);
+ if (client != NULL) {
+ struct necp_client_flow_registration *flow_registration = necp_client_find_flow(client, client_id);
+ if (flow_registration == NULL && RB_EMPTY(&client->flow_registrations) && !necp_client_id_is_flow(client_id)) {
+ // No flows yet on this client, add a new registration
+ flow_registration = necp_client_create_flow_registration(client_fd, client);
+ if (flow_registration == NULL) {
+ error = ENOMEM;
+ }
+ }
+ if (flow_registration != NULL) {
+ // Found the right client and flow!
+ found_client = TRUE;
+
+ struct necp_client_flow *flow = NULL;
+ LIST_FOREACH(flow, &flow_registration->flow_list, flow_chain) {
+ if (flow->socket && flow->u.socket_handle == inp) {
+ // Release prior results and route
+ if (flow->assigned_results != NULL) {
+ FREE(flow->assigned_results, M_NETAGENT);
+ flow->assigned_results = NULL;
}
- if (length >= sizeof(struct necp_client_parameter_netagent_type)) {
- memcpy(&parsed_parameters->prohibited_netagent_types[num_prohibited_agent_types], value, sizeof(struct necp_client_parameter_netagent_type));
- num_prohibited_agent_types++;
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_AGENT_TYPE;
+
+ ifnet_t ifp = NULL;
+ if ((inp->inp_flags & INP_BOUND_IF) && inp->inp_boundifp) {
+ ifp = inp->inp_boundifp;
+ } else {
+ ifp = inp->inp_last_outifp;
}
- break;
- }
- case NECP_CLIENT_PARAMETER_PREFER_AGENT_TYPE: {
- if (num_preferred_agent_types >= NECP_MAX_PARSED_PARAMETERS) {
- break;
+
+ if (ifp != NULL) {
+ flow->interface_index = ifp->if_index;
+ } else {
+ flow->interface_index = IFSCOPE_NONE;
}
- if (length >= sizeof(struct necp_client_parameter_netagent_type)) {
- memcpy(&parsed_parameters->preferred_netagent_types[num_preferred_agent_types], value, sizeof(struct necp_client_parameter_netagent_type));
- num_preferred_agent_types++;
- parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT_TYPE;
+
+ if (inp->inp_vflag & INP_IPV4) {
+ flow->local_addr.sin.sin_family = AF_INET;
+ flow->local_addr.sin.sin_len = sizeof(struct sockaddr_in);
+ flow->local_addr.sin.sin_port = inp->inp_lport;
+ memcpy(&flow->local_addr.sin.sin_addr, &inp->inp_laddr, sizeof(struct in_addr));
+
+ flow->remote_addr.sin.sin_family = AF_INET;
+ flow->remote_addr.sin.sin_len = sizeof(struct sockaddr_in);
+ flow->remote_addr.sin.sin_port = inp->inp_fport;
+ memcpy(&flow->remote_addr.sin.sin_addr, &inp->inp_faddr, sizeof(struct in_addr));
+ } else if (inp->inp_vflag & INP_IPV6) {
+ in6_ip6_to_sockaddr(&inp->in6p_laddr, inp->inp_lport, &flow->local_addr.sin6, sizeof(flow->local_addr));
+ in6_ip6_to_sockaddr(&inp->in6p_faddr, inp->inp_fport, &flow->remote_addr.sin6, sizeof(flow->remote_addr));
}
- break;
- }
- default: {
+
+ flow->viable = necp_client_flow_is_viable(proc, client, flow);
+
+ uuid_t empty_uuid;
+ uuid_clear(empty_uuid);
+ flow->assigned = TRUE;
+ flow->assigned_results = necp_create_nexus_assign_message(empty_uuid, 0, NULL, 0,
+ (struct necp_client_endpoint *)&flow->local_addr,
+ (struct necp_client_endpoint *)&flow->remote_addr,
+ 0, NULL, &flow->assigned_results_length);
+ flow_registration->flow_result_read = FALSE;
+ client_updated = TRUE;
break;
}
}
}
+
+ NECP_CLIENT_UNLOCK(client);
+ }
+ if (client_updated) {
+ necp_fd_notify(client_fd, true);
+ }
+ NECP_FD_UNLOCK(client_fd);
+
+ proc_rele(proc);
+ proc = PROC_NULL;
+
+ if (found_client) {
+ break;
}
+ }
+ NECP_FD_LIST_UNLOCK();
- offset += sizeof(u_int8_t) + sizeof(u_int32_t) + length;
+ if (error == 0) {
+ if (!found_client) {
+ error = ENOENT;
+ } else if (!client_updated) {
+ error = EINVAL;
+ }
}
return (error);
}
int
-necp_assign_client_result(uuid_t netagent_uuid, uuid_t client_id,
- u_int8_t *assigned_results, size_t assigned_results_length)
+necp_update_flow_protoctl_event(uuid_t netagent_uuid, uuid_t client_id,
+ uint32_t protoctl_event_code, uint32_t protoctl_event_val,
+ uint32_t protoctl_event_tcp_seq_number)
{
int error = 0;
struct necp_fd_data *client_fd = NULL;
bool found_client = FALSE;
bool client_updated = FALSE;
- lck_rw_lock_shared(&necp_fd_lock);
-
+ NECP_FD_LIST_LOCK_SHARED();
LIST_FOREACH(client_fd, &necp_fd_list, chain) {
- struct necp_client *client = NULL;
- lck_mtx_lock(&client_fd->fd_lock);
- LIST_FOREACH(client, &client_fd->clients, chain) {
- if (uuid_compare(client->client_id, client_id) == 0) {
- // Found the right client!
+ proc_t proc = proc_find(client_fd->proc_pid);
+ if (proc == PROC_NULL) {
+ continue;
+ }
+
+ NECP_FD_LOCK(client_fd);
+
+ struct necp_client *client = necp_client_fd_find_client_and_lock(client_fd, client_id);
+ if (client != NULL) {
+ struct necp_client_flow_registration *flow_registration = necp_client_find_flow(client, client_id);
+ if (flow_registration != NULL) {
+ // Found the right client and flow!
found_client = TRUE;
- if (uuid_compare(client->nexus_agent, netagent_uuid) == 0) {
+ struct necp_client_flow *flow = NULL;
+ LIST_FOREACH(flow, &flow_registration->flow_list, flow_chain) {
// Verify that the client nexus agent matches
- if (client->assigned_results != NULL) {
- // Release prior result
- FREE(client->assigned_results, M_NETAGENT);
+ if (flow->nexus &&
+ uuid_compare(flow->u.nexus_agent,
+ netagent_uuid) == 0) {
+ flow->has_protoctl_event = TRUE;
+ flow->protoctl_event.protoctl_event_code = protoctl_event_code;
+ flow->protoctl_event.protoctl_event_val = protoctl_event_val;
+ flow->protoctl_event.protoctl_event_tcp_seq_num = protoctl_event_tcp_seq_number;
+ flow_registration->flow_result_read = FALSE;
+ client_updated = TRUE;
+ break;
}
- client->assigned_results = assigned_results;
- client->assigned_results_length = assigned_results_length;
- client->assigned_result_read = FALSE;
- client_updated = TRUE;
}
}
+
+ NECP_CLIENT_UNLOCK(client);
}
+
if (client_updated) {
necp_fd_notify(client_fd, true);
}
- lck_mtx_unlock(&client_fd->fd_lock);
+
+ NECP_FD_UNLOCK(client_fd);
+ proc_rele(proc);
+ proc = PROC_NULL;
+
+ if (found_client) {
+ break;
+ }
+ }
+ NECP_FD_LIST_UNLOCK();
+
+ if (!found_client) {
+ error = ENOENT;
+ } else if (!client_updated) {
+ error = EINVAL;
+ }
+ return (error);
+}
+
+static bool
+necp_assign_client_result_locked(struct proc *proc,
+ struct necp_fd_data *client_fd,
+ struct necp_client *client,
+ struct necp_client_flow_registration *flow_registration,
+ uuid_t netagent_uuid,
+ u_int8_t *assigned_results,
+ size_t assigned_results_length,
+ bool notify_fd)
+{
+ bool client_updated = FALSE;
+
+ NECP_FD_ASSERT_LOCKED(client_fd);
+ NECP_CLIENT_ASSERT_LOCKED(client);
+
+ struct necp_client_flow *flow = NULL;
+ LIST_FOREACH(flow, &flow_registration->flow_list, flow_chain) {
+ // Verify that the client nexus agent matches
+ if (flow->nexus &&
+ uuid_compare(flow->u.nexus_agent, netagent_uuid) == 0) {
+ // Release prior results and route
+ if (flow->assigned_results != NULL) {
+ FREE(flow->assigned_results, M_NETAGENT);
+ flow->assigned_results = NULL;
+ }
+
+ void *nexus_stats = NULL;
+ if (assigned_results != NULL && assigned_results_length > 0) {
+ int error = necp_client_parse_result(assigned_results, (u_int32_t)assigned_results_length,
+ &flow->local_addr, &flow->remote_addr, &nexus_stats);
+ VERIFY(error == 0);
+ }
+
+ flow->viable = necp_client_flow_is_viable(proc, client, flow);
+
+ flow->assigned = TRUE;
+ flow->assigned_results = assigned_results;
+ flow->assigned_results_length = assigned_results_length;
+ flow_registration->flow_result_read = FALSE;
+ client_updated = TRUE;
+ break;
+ }
+ }
+
+ if (client_updated && notify_fd) {
+ necp_fd_notify(client_fd, true);
+ }
+
+ // if not updated, client must free assigned_results
+ return (client_updated);
+}
+
+int
+necp_assign_client_result(uuid_t netagent_uuid, uuid_t client_id,
+ u_int8_t *assigned_results, size_t assigned_results_length)
+{
+ int error = 0;
+ struct necp_fd_data *client_fd = NULL;
+ bool found_client = FALSE;
+ bool client_updated = FALSE;
+
+ NECP_FD_LIST_LOCK_SHARED();
+
+ LIST_FOREACH(client_fd, &necp_fd_list, chain) {
+ proc_t proc = proc_find(client_fd->proc_pid);
+ if (proc == PROC_NULL) {
+ continue;
+ }
+
+ NECP_FD_LOCK(client_fd);
+ struct necp_client *client = necp_client_fd_find_client_and_lock(client_fd, client_id);
+ if (client != NULL) {
+ struct necp_client_flow_registration *flow_registration = necp_client_find_flow(client, client_id);
+ if (flow_registration != NULL) {
+ // Found the right client and flow!
+ found_client = TRUE;
+ if (necp_assign_client_result_locked(proc, client_fd, client, flow_registration, netagent_uuid,
+ assigned_results, assigned_results_length, true)) {
+ client_updated = TRUE;
+ }
+ }
+
+ NECP_CLIENT_UNLOCK(client);
+ }
+ NECP_FD_UNLOCK(client_fd);
+
+ proc_rele(proc);
+ proc = PROC_NULL;
if (found_client) {
break;
}
}
- lck_rw_done(&necp_fd_lock);
+ NECP_FD_LIST_UNLOCK();
+ // upon error, client must free assigned_results
if (!found_client) {
error = ENOENT;
} else if (!client_updated) {
/// Client updating
static bool
-necp_update_client_result(proc_t proc,
- struct necp_client *client)
+necp_update_parsed_parameters(struct necp_client_parsed_parameters *parsed_parameters,
+ struct necp_aggregate_result *result)
{
- struct necp_client_result_netagent netagent;
- struct necp_aggregate_result result;
- struct necp_client_parsed_parameters parsed_parameters;
- u_int32_t flags = 0;
+ if (parsed_parameters == NULL ||
+ result == NULL) {
+ return (false);
+ }
- uuid_clear(client->nexus_agent);
+ bool updated = false;
+ for (int i = 0; i < NECP_MAX_NETAGENTS; i++) {
+ if (uuid_is_null(result->netagents[i])) {
+ // Passed end of valid agents
+ break;
+ }
- int error = necp_client_parse_parameters(client->parameters, (u_int32_t)client->parameters_length, &parsed_parameters);
- if (error != 0) {
- return (FALSE);
+ if (!(result->netagent_use_flags[i] & NECP_AGENT_USE_FLAG_SCOPE)) {
+ // Not a scoped agent, ignore
+ continue;
+ }
+
+ // This is a scoped agent. Add it to the required agents.
+ if (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT) {
+ // Already some required agents, add this at the end
+ for (int j = 0; j < NECP_MAX_PARSED_PARAMETERS; j++) {
+ if (uuid_compare(parsed_parameters->required_netagents[j], result->netagents[i]) == 0) {
+ // Already required, break
+ break;
+ }
+ if (uuid_is_null(parsed_parameters->required_netagents[j])) {
+ // Add here
+ memcpy(&parsed_parameters->required_netagents[j], result->netagents[i], sizeof(uuid_t));
+ updated = true;
+ break;
+ }
+ }
+ } else {
+ // No required agents yet, add this one
+ parsed_parameters->valid_fields |= NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT;
+ memcpy(&parsed_parameters->required_netagents[0], result->netagents[i], sizeof(uuid_t));
+ updated = true;
+ }
+
+ // Remove requirements for agents of the same type
+ if (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT_TYPE) {
+ char remove_agent_domain[NETAGENT_DOMAINSIZE] = { 0 };
+ char remove_agent_type[NETAGENT_TYPESIZE] = { 0 };
+ if (netagent_get_agent_domain_and_type(result->netagents[i], remove_agent_domain, remove_agent_type)) {
+ for (int j = 0; j < NECP_MAX_PARSED_PARAMETERS; j++) {
+ if (strlen(parsed_parameters->required_netagent_types[j].netagent_domain) == 0 &&
+ strlen(parsed_parameters->required_netagent_types[j].netagent_type) == 0) {
+ break;
+ }
+
+ if (strncmp(parsed_parameters->required_netagent_types[j].netagent_domain, remove_agent_domain, NETAGENT_DOMAINSIZE) == 0 &&
+ strncmp(parsed_parameters->required_netagent_types[j].netagent_type, remove_agent_type, NETAGENT_TYPESIZE) == 0) {
+
+ updated = true;
+
+ if (j == NECP_MAX_PARSED_PARAMETERS - 1) {
+ // Last field, just clear and break
+ memset(&parsed_parameters->required_netagent_types[NECP_MAX_PARSED_PARAMETERS - 1], 0, sizeof(struct necp_client_parameter_netagent_type));
+ break;
+ } else {
+ // Move the parameters down, clear the last entry
+ memmove(&parsed_parameters->required_netagent_types[j],
+ &parsed_parameters->required_netagent_types[j + 1],
+ sizeof(struct necp_client_parameter_netagent_type) * (NECP_MAX_PARSED_PARAMETERS - (j + 1)));
+ memset(&parsed_parameters->required_netagent_types[NECP_MAX_PARSED_PARAMETERS - 1], 0, sizeof(struct necp_client_parameter_netagent_type));
+ // Continue, don't increment but look at the new shifted item instead
+ continue;
+ }
+ }
+
+ // Increment j to look at the next agent type parameter
+ j++;
+ }
+ }
+ }
}
+ if (updated &&
+ parsed_parameters->required_interface_index != IFSCOPE_NONE &&
+ (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IF) == 0) {
+ // A required interface index was added after the fact. Clear it.
+ parsed_parameters->required_interface_index = IFSCOPE_NONE;
+ }
+
+
+ return (updated);
+}
+
+static inline bool
+necp_agent_types_match(const char *agent_domain1, const char *agent_type1,
+ const char *agent_domain2, const char *agent_type2)
+{
+ return ((strlen(agent_domain1) == 0 ||
+ strncmp(agent_domain2, agent_domain1, NETAGENT_DOMAINSIZE) == 0) &&
+ (strlen(agent_type1) == 0 ||
+ strncmp(agent_type2, agent_type1, NETAGENT_TYPESIZE) == 0));
+}
+
+static inline bool
+necp_calculate_client_result(proc_t proc,
+ struct necp_client *client,
+ struct necp_client_parsed_parameters *parsed_parameters,
+ struct necp_aggregate_result *result,
+ u_int32_t *flags)
+{
+ struct rtentry *route = NULL;
+
// Check parameters to find best interface
+ bool validate_agents = false;
u_int matching_if_index = 0;
- if (necp_find_matching_interface_index(&parsed_parameters, &matching_if_index)) {
+ if (necp_find_matching_interface_index(parsed_parameters, &matching_if_index, &validate_agents)) {
if (matching_if_index != 0) {
- parsed_parameters.required_interface_index = matching_if_index;
+ parsed_parameters->required_interface_index = matching_if_index;
}
// Interface found or not needed, match policy.
- error = necp_application_find_policy_match_internal(proc, client->parameters, (u_int32_t)client->parameters_length, &result, &flags, matching_if_index);
+ memset(result, 0, sizeof(*result));
+ int error = necp_application_find_policy_match_internal(proc, client->parameters,
+ (u_int32_t)client->parameters_length,
+ result, flags, matching_if_index,
+ NULL, NULL, &route, false);
if (error != 0) {
+ if (route != NULL) {
+ rtfree(route);
+ }
+ return (FALSE);
+ }
+
+ if (validate_agents) {
+ bool requirement_failed = FALSE;
+ if (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT) {
+ for (int i = 0; i < NECP_MAX_PARSED_PARAMETERS; i++) {
+ if (uuid_is_null(parsed_parameters->required_netagents[i])) {
+ break;
+ }
+
+ bool requirement_found = FALSE;
+ for (int j = 0; j < NECP_MAX_NETAGENTS; j++) {
+ if (uuid_is_null(result->netagents[j])) {
+ break;
+ }
+
+ if (uuid_compare(parsed_parameters->required_netagents[i], result->netagents[j]) == 0) {
+ requirement_found = TRUE;
+ break;
+ }
+ }
+
+ if (!requirement_found) {
+ requirement_failed = TRUE;
+ break;
+ }
+ }
+ }
+
+ if (!requirement_failed && parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT_TYPE) {
+ for (int i = 0; i < NECP_MAX_PARSED_PARAMETERS; i++) {
+ if (strlen(parsed_parameters->required_netagent_types[i].netagent_domain) == 0 &&
+ strlen(parsed_parameters->required_netagent_types[i].netagent_type) == 0) {
+ break;
+ }
+
+ bool requirement_found = FALSE;
+ for (int j = 0; j < NECP_MAX_NETAGENTS; j++) {
+ if (uuid_is_null(result->netagents[j])) {
+ break;
+ }
+
+ char policy_agent_domain[NETAGENT_DOMAINSIZE] = { 0 };
+ char policy_agent_type[NETAGENT_TYPESIZE] = { 0 };
+
+ if (netagent_get_agent_domain_and_type(result->netagents[j], policy_agent_domain, policy_agent_type)) {
+ if (necp_agent_types_match(parsed_parameters->required_netagent_types[i].netagent_domain,
+ parsed_parameters->required_netagent_types[i].netagent_type,
+ policy_agent_domain, policy_agent_type)) {
+ requirement_found = TRUE;
+ break;
+ }
+ }
+ }
+
+ if (!requirement_found) {
+ requirement_failed = TRUE;
+ break;
+ }
+ }
+ }
+
+ if (requirement_failed) {
+ // Agent requirement failed. Clear out the whole result, make everything fail.
+ memset(result, 0, sizeof(*result));
+ if (route != NULL) {
+ rtfree(route);
+ }
+ return (TRUE);
+ }
+ }
+
+ // Reset current route
+ NECP_CLIENT_ROUTE_LOCK(client);
+ if (client->current_route != NULL) {
+ rtfree(client->current_route);
+ }
+ client->current_route = route;
+ NECP_CLIENT_ROUTE_UNLOCK(client);
+ } else {
+ // Interface not found. Clear out the whole result, make everything fail.
+ memset(result, 0, sizeof(*result));
+ }
+
+ return (TRUE);
+}
+
+static bool
+necp_update_client_result(proc_t proc,
+ struct necp_fd_data *client_fd,
+ struct necp_client *client,
+ struct _necp_flow_defunct_list *defunct_list)
+{
+ struct necp_client_result_netagent netagent;
+ struct necp_aggregate_result result;
+ struct necp_client_parsed_parameters *parsed_parameters = NULL;
+ u_int32_t flags = 0;
+
+ NECP_CLIENT_ASSERT_LOCKED(client);
+
+ MALLOC(parsed_parameters, struct necp_client_parsed_parameters *, sizeof(*parsed_parameters), M_NECP, (M_WAITOK | M_ZERO));
+ if (parsed_parameters == NULL) {
+ NECPLOG0(LOG_ERR, "Failed to allocate parsed parameters");
+ return (FALSE);
+ }
+
+ // Nexus flows will be brought back if they are still valid
+ necp_client_mark_all_nonsocket_flows_as_invalid(client);
+
+ int error = necp_client_parse_parameters(client->parameters, (u_int32_t)client->parameters_length, parsed_parameters);
+ if (error != 0) {
+ FREE(parsed_parameters, M_NECP);
+ return (FALSE);
+ }
+
+ // Update saved IP protocol
+ client->ip_protocol = parsed_parameters->ip_protocol;
+
+ // Calculate the policy result
+ if (!necp_calculate_client_result(proc, client, parsed_parameters, &result, &flags)) {
+ FREE(parsed_parameters, M_NECP);
+ return (FALSE);
+ }
+
+ if (necp_update_parsed_parameters(parsed_parameters, &result)) {
+ // Changed the parameters based on result, try again (only once)
+ if (!necp_calculate_client_result(proc, client, parsed_parameters, &result, &flags)) {
+ FREE(parsed_parameters, M_NECP);
return (FALSE);
}
+ }
+
+ // Save the last policy id on the client
+ client->policy_id = result.policy_id;
+
+ if ((parsed_parameters->flags & NECP_CLIENT_PARAMETER_FLAG_MULTIPATH) ||
+ ((parsed_parameters->flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER) &&
+ result.routing_result != NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED)) {
+ client->allow_multiple_flows = TRUE;
} else {
- // Interface not found. Clear out the whole result, make everything fail.
- memset(&result, 0, sizeof(result));
+ client->allow_multiple_flows = FALSE;
}
// If the original request was scoped, and the policy result matches, make sure the result is scoped
if ((result.routing_result == NECP_KERNEL_POLICY_RESULT_NONE ||
result.routing_result == NECP_KERNEL_POLICY_RESULT_PASS) &&
result.routed_interface_index != IFSCOPE_NONE &&
- parsed_parameters.required_interface_index == result.routed_interface_index) {
+ parsed_parameters->required_interface_index == result.routed_interface_index) {
result.routing_result = NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED;
result.routing_result_parameter.scoped_interface_index = result.routed_interface_index;
}
+ if (defunct_list != NULL &&
+ result.routing_result == NECP_KERNEL_POLICY_RESULT_DROP) {
+ // If we are forced to drop the client, defunct it if it has flows
+ necp_defunct_client_for_policy(client, defunct_list);
+ }
+
+ // Recalculate flags
+ if (parsed_parameters->flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER) {
+ // Listeners are valid as long as they aren't dropped
+ if (result.routing_result != NECP_KERNEL_POLICY_RESULT_DROP) {
+ flags |= NECP_CLIENT_RESULT_FLAG_SATISFIED;
+ }
+ } else if (result.routed_interface_index != 0) {
+ // Clients without flows determine viability based on having some routable interface
+ flags |= NECP_CLIENT_RESULT_FLAG_SATISFIED;
+ }
+
bool updated = FALSE;
u_int8_t *cursor = client->result;
- const u_int8_t *max = client->result + NECP_MAX_CLIENT_RESULT_SIZE;
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_CLIENT_ID, sizeof(uuid_t), client->client_id, &updated);
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_POLICY_RESULT, sizeof(result.routing_result), &result.routing_result, &updated);
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_FLAGS, sizeof(flags), &flags, &updated, client->result, sizeof(client->result));
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_CLIENT_ID, sizeof(uuid_t), client->client_id, &updated,
+ client->result, sizeof(client->result));
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_POLICY_RESULT, sizeof(result.routing_result), &result.routing_result, &updated,
+ client->result, sizeof(client->result));
if (result.routing_result_parameter.tunnel_interface_index != 0) {
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_POLICY_RESULT_PARAMETER,
- sizeof(result.routing_result_parameter), &result.routing_result_parameter, &updated);
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_POLICY_RESULT_PARAMETER,
+ sizeof(result.routing_result_parameter), &result.routing_result_parameter, &updated,
+ client->result, sizeof(client->result));
}
if (result.filter_control_unit != 0) {
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_FILTER_CONTROL_UNIT,
- sizeof(result.filter_control_unit), &result.filter_control_unit, &updated);
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_FILTER_CONTROL_UNIT,
+ sizeof(result.filter_control_unit), &result.filter_control_unit, &updated,
+ client->result, sizeof(client->result));
}
if (result.routed_interface_index != 0) {
u_int routed_interface_index = result.routed_interface_index;
if (result.routing_result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL &&
- parsed_parameters.required_interface_index != IFSCOPE_NONE &&
- parsed_parameters.required_interface_index != result.routed_interface_index) {
- routed_interface_index = parsed_parameters.required_interface_index;
+ parsed_parameters->required_interface_index != IFSCOPE_NONE &&
+ parsed_parameters->required_interface_index != result.routed_interface_index) {
+ routed_interface_index = parsed_parameters->required_interface_index;
}
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_INTERFACE_INDEX,
- sizeof(routed_interface_index), &routed_interface_index, &updated);
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_INTERFACE_INDEX,
+ sizeof(routed_interface_index), &routed_interface_index, &updated,
+ client->result, sizeof(client->result));
+ }
+ if (client_fd && client_fd->flags & NECP_OPEN_FLAG_BACKGROUND) {
+ u_int32_t effective_traffic_class = SO_TC_BK_SYS;
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_EFFECTIVE_TRAFFIC_CLASS,
+ sizeof(effective_traffic_class), &effective_traffic_class, &updated,
+ client->result, sizeof(client->result));
+ }
+ if (client->background_update) {
+ u_int32_t background = client->background;
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_TRAFFIC_MGMT_BG,
+ sizeof(background), &background, &updated,
+ client->result, sizeof(client->result));
+ if (updated) {
+ client->background_update = 0;
+ }
+ }
+ NECP_CLIENT_ROUTE_LOCK(client);
+ if (client->current_route != NULL) {
+ const u_int32_t route_mtu = get_maxmtu(client->current_route);
+ if (route_mtu != 0) {
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_EFFECTIVE_MTU,
+ sizeof(route_mtu), &route_mtu, &updated,
+ client->result, sizeof(client->result));
+ }
}
- if (flags != 0) {
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_FLAGS,
- sizeof(flags), &flags, &updated);
+ NECP_CLIENT_ROUTE_UNLOCK(client);
+
+ if (result.mss_recommended != 0) {
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_RECOMMENDED_MSS,
+ sizeof(result.mss_recommended), &result.mss_recommended, &updated,
+ client->result, sizeof(client->result));
}
+
for (int i = 0; i < NECP_MAX_NETAGENTS; i++) {
if (uuid_is_null(result.netagents[i])) {
break;
}
uuid_copy(netagent.netagent_uuid, result.netagents[i]);
netagent.generation = netagent_get_generation(netagent.netagent_uuid);
- if (necp_netagent_applies_to_client(client, &parsed_parameters, netagent.netagent_uuid)) {
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_NETAGENT, sizeof(netagent), &netagent, &updated);
+ if (necp_netagent_applies_to_client(client, parsed_parameters, &netagent.netagent_uuid, TRUE, 0, 0)) {
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_NETAGENT, sizeof(netagent), &netagent, &updated,
+ client->result, sizeof(client->result));
}
}
ifnet_t delegate_interface = NULL;
ifnet_t original_scoped_interface = NULL;
- if (result.routed_interface_index != IFSCOPE_NONE && (int)result.routed_interface_index <= if_index) {
+ if (result.routed_interface_index != IFSCOPE_NONE && result.routed_interface_index <= (u_int32_t)if_index) {
direct_interface = ifindex2ifnet[result.routed_interface_index];
- } else if (parsed_parameters.required_interface_index != IFSCOPE_NONE &&
- (int)parsed_parameters.required_interface_index <= if_index) {
+ } else if (parsed_parameters->required_interface_index != IFSCOPE_NONE &&
+ parsed_parameters->required_interface_index <= (u_int32_t)if_index) {
// If the request was scoped, but the route didn't match, still grab the agents
- direct_interface = ifindex2ifnet[parsed_parameters.required_interface_index];
+ direct_interface = ifindex2ifnet[parsed_parameters->required_interface_index];
} else if (result.routed_interface_index == IFSCOPE_NONE &&
result.routing_result == NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED &&
result.routing_result_parameter.scoped_interface_index != IFSCOPE_NONE) {
delegate_interface = direct_interface->if_delegated.ifp;
}
if (result.routing_result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL &&
- parsed_parameters.required_interface_index != IFSCOPE_NONE &&
- parsed_parameters.required_interface_index != result.routing_result_parameter.tunnel_interface_index &&
- (int)parsed_parameters.required_interface_index <= if_index) {
- original_scoped_interface = ifindex2ifnet[parsed_parameters.required_interface_index];
+ parsed_parameters->required_interface_index != IFSCOPE_NONE &&
+ parsed_parameters->required_interface_index != result.routing_result_parameter.tunnel_interface_index &&
+ parsed_parameters->required_interface_index <= (u_int32_t)if_index) {
+ original_scoped_interface = ifindex2ifnet[parsed_parameters->required_interface_index];
}
// Add interfaces
if (original_scoped_interface != NULL) {
struct necp_client_result_interface interface_struct;
interface_struct.index = original_scoped_interface->if_index;
interface_struct.generation = ifnet_get_generation(original_scoped_interface);
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_INTERFACE, sizeof(interface_struct), &interface_struct, &updated);
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_INTERFACE, sizeof(interface_struct), &interface_struct, &updated,
+ client->result, sizeof(client->result));
}
if (direct_interface != NULL) {
struct necp_client_result_interface interface_struct;
interface_struct.index = direct_interface->if_index;
interface_struct.generation = ifnet_get_generation(direct_interface);
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_INTERFACE, sizeof(interface_struct), &interface_struct, &updated);
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_INTERFACE, sizeof(interface_struct), &interface_struct, &updated,
+ client->result, sizeof(client->result));
+
+ // Set the delta time since interface up/down
+ struct timeval updown_delta = {};
+ if (ifnet_updown_delta(direct_interface, &updown_delta) == 0) {
+ u_int32_t delta = updown_delta.tv_sec;
+ bool ignore_updated = FALSE;
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_INTERFACE_TIME_DELTA,
+ sizeof(delta), &delta, &ignore_updated,
+ client->result, sizeof(client->result));
+ }
}
if (delegate_interface != NULL) {
struct necp_client_result_interface interface_struct;
interface_struct.index = delegate_interface->if_index;
interface_struct.generation = ifnet_get_generation(delegate_interface);
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_INTERFACE, sizeof(interface_struct), &interface_struct, &updated);
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_INTERFACE, sizeof(interface_struct), &interface_struct, &updated,
+ client->result, sizeof(client->result));
+ }
+
+ // Update multipath/listener interface flows
+ if (parsed_parameters->flags & NECP_CLIENT_PARAMETER_FLAG_MULTIPATH) {
+ // Get multipath interface options from ordered list
+ struct ifnet *multi_interface = NULL;
+ TAILQ_FOREACH(multi_interface, &ifnet_ordered_head, if_ordered_link) {
+ if (necp_ifnet_matches_parameters(multi_interface, parsed_parameters, NULL, true)) {
+ // Add multipath interface flows for kernel MPTCP
+ necp_client_add_interface_option_if_needed(client, multi_interface->if_index,
+ ifnet_get_generation(multi_interface), NULL);
+
+ // Add nexus agents for multipath
+ necp_client_add_agent_interface_options(client, parsed_parameters, multi_interface);
+ }
+ }
+ } else if ((parsed_parameters->flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER) &&
+ result.routing_result != NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED) {
+ // Get listener interface options from global list
+ struct ifnet *listen_interface = NULL;
+ TAILQ_FOREACH(listen_interface, &ifnet_head, if_link) {
+ if (necp_ifnet_matches_parameters(listen_interface, parsed_parameters, NULL, true)) {
+ // Add nexus agents for listeners
+ necp_client_add_agent_interface_options(client, parsed_parameters, listen_interface);
+ }
+ }
}
+
// Add agents
if (original_scoped_interface != NULL) {
ifnet_lock_shared(original_scoped_interface);
}
uuid_copy(netagent.netagent_uuid, original_scoped_interface->if_agentids[i]);
netagent.generation = netagent_get_generation(netagent.netagent_uuid);
- if (necp_netagent_applies_to_client(client, &parsed_parameters, netagent.netagent_uuid)) {
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_NETAGENT, sizeof(netagent), &netagent, &updated);
+ if (necp_netagent_applies_to_client(client, parsed_parameters, &netagent.netagent_uuid, FALSE,
+ original_scoped_interface->if_index, ifnet_get_generation(original_scoped_interface))) {
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_NETAGENT, sizeof(netagent), &netagent, &updated,
+ client->result, sizeof(client->result));
}
}
}
}
uuid_copy(netagent.netagent_uuid, direct_interface->if_agentids[i]);
netagent.generation = netagent_get_generation(netagent.netagent_uuid);
- if (necp_netagent_applies_to_client(client, &parsed_parameters, netagent.netagent_uuid)) {
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_NETAGENT, sizeof(netagent), &netagent, &updated);
+ if (necp_netagent_applies_to_client(client, parsed_parameters, &netagent.netagent_uuid, TRUE,
+ direct_interface->if_index, ifnet_get_generation(direct_interface))) {
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_NETAGENT, sizeof(netagent), &netagent, &updated,
+ client->result, sizeof(client->result));
}
}
}
}
uuid_copy(netagent.netagent_uuid, delegate_interface->if_agentids[i]);
netagent.generation = netagent_get_generation(netagent.netagent_uuid);
- if (necp_netagent_applies_to_client(client, &parsed_parameters, netagent.netagent_uuid)) {
- cursor = necp_buffer_write_tlv_if_different(cursor, max, NECP_CLIENT_RESULT_NETAGENT, sizeof(netagent), &netagent, &updated);
+ if (necp_netagent_applies_to_client(client, parsed_parameters, &netagent.netagent_uuid, FALSE,
+ delegate_interface->if_index, ifnet_get_generation(delegate_interface))) {
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_NETAGENT, sizeof(netagent), &netagent, &updated,
+ client->result, sizeof(client->result));
}
}
}
}
ifnet_head_done();
+ // Add interface options
+ for (u_int32_t option_i = 0; option_i < client->interface_option_count; option_i++) {
+ if (option_i < NECP_CLIENT_INTERFACE_OPTION_STATIC_COUNT) {
+ struct necp_client_interface_option *option = &client->interface_options[option_i];
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_INTERFACE_OPTION, sizeof(*option), option, &updated,
+ client->result, sizeof(client->result));
+ } else {
+ struct necp_client_interface_option *option = &client->extra_interface_options[option_i - NECP_CLIENT_INTERFACE_OPTION_STATIC_COUNT];
+ cursor = necp_buffer_write_tlv_if_different(cursor, NECP_CLIENT_RESULT_INTERFACE_OPTION, sizeof(*option), option, &updated,
+ client->result, sizeof(client->result));
+ }
+ }
+
size_t new_result_length = (cursor - client->result);
if (new_result_length != client->result_length) {
client->result_length = new_result_length;
updated = TRUE;
}
+
+ // Update flow viability/flags
+ if (necp_client_update_flows(proc, client, defunct_list)) {
+ updated = TRUE;
+ }
+
if (updated) {
client->result_read = FALSE;
+ necp_client_update_observer_update(client);
}
+ FREE(parsed_parameters, M_NECP);
return (updated);
}
+static inline void
+necp_defunct_client_fd_locked(struct necp_fd_data *client_fd, struct _necp_flow_defunct_list *defunct_list, struct proc *proc)
+{
+#pragma unused(proc)
+ bool updated_result = FALSE;
+ struct necp_client *client = NULL;
+
+ NECP_FD_ASSERT_LOCKED(client_fd);
+
+ RB_FOREACH(client, _necp_client_tree, &client_fd->clients) {
+ struct necp_client_flow_registration *flow_registration = NULL;
+
+ NECP_CLIENT_LOCK(client);
+
+ // Prepare close events to be sent to the nexus to effectively remove the flows
+ struct necp_client_flow *search_flow = NULL;
+ RB_FOREACH(flow_registration, _necp_client_flow_tree, &client->flow_registrations) {
+ LIST_FOREACH(search_flow, &flow_registration->flow_list, flow_chain) {
+ if (search_flow->nexus &&
+ !uuid_is_null(search_flow->u.nexus_agent)) {
+
+ struct necp_flow_defunct *flow_defunct;
+
+ // Sleeping alloc won't fail; copy only what's necessary
+ flow_defunct = _MALLOC(sizeof (struct necp_flow_defunct), M_NECP, M_WAITOK | M_ZERO);
+ uuid_copy(flow_defunct->nexus_agent, search_flow->u.nexus_agent);
+ uuid_copy(flow_defunct->flow_id, ((flow_registration->flags & NECP_CLIENT_FLOW_FLAGS_USE_CLIENT_ID) ?
+ client->client_id :
+ flow_registration->registration_id));
+ flow_defunct->proc_pid = client->proc_pid;
+ flow_defunct->agent_handle = client->agent_handle;
+
+ // Add to the list provided by caller
+ LIST_INSERT_HEAD(defunct_list, flow_defunct, chain);
+
+ flow_registration->defunct = true;
+ flow_registration->flow_result_read = false;
+ updated_result = true;
+ }
+ }
+ }
+ NECP_CLIENT_UNLOCK(client);
+ }
+
+
+ if (updated_result) {
+ necp_fd_notify(client_fd, true);
+ }
+}
+
+static inline void
+necp_update_client_fd_locked(struct necp_fd_data *client_fd,
+ proc_t proc,
+ struct _necp_flow_defunct_list *defunct_list)
+{
+ struct necp_client *client = NULL;
+ bool updated_result = FALSE;
+ NECP_FD_ASSERT_LOCKED(client_fd);
+ RB_FOREACH(client, _necp_client_tree, &client_fd->clients) {
+ NECP_CLIENT_LOCK(client);
+ if (necp_update_client_result(proc, client_fd, client, defunct_list)) {
+ updated_result = TRUE;
+ }
+ NECP_CLIENT_UNLOCK(client);
+ }
+ if (updated_result) {
+ necp_fd_notify(client_fd, true);
+ }
+}
+
+
static void
necp_update_all_clients_callout(__unused thread_call_param_t dummy,
__unused thread_call_param_t arg)
{
-#pragma unused(arg)
struct necp_fd_data *client_fd = NULL;
- lck_rw_lock_shared(&necp_fd_lock);
+ struct _necp_flow_defunct_list defunct_list;
+ LIST_INIT(&defunct_list);
+
+ NECP_FD_LIST_LOCK_SHARED();
LIST_FOREACH(client_fd, &necp_fd_list, chain) {
- bool updated_result = FALSE;
- struct necp_client *client = NULL;
proc_t proc = proc_find(client_fd->proc_pid);
- if (proc == NULL) {
+ if (proc == PROC_NULL) {
continue;
}
- lck_mtx_lock(&client_fd->fd_lock);
- LIST_FOREACH(client, &client_fd->clients, chain) {
- if (necp_update_client_result(proc, client)) {
- updated_result = TRUE;
- }
- }
- if (updated_result) {
- necp_fd_notify(client_fd, true);
- }
- lck_mtx_unlock(&client_fd->fd_lock);
+ // Update all clients on one fd
+ NECP_FD_LOCK(client_fd);
+ necp_update_client_fd_locked(client_fd, proc, &defunct_list);
+ NECP_FD_UNLOCK(client_fd);
proc_rele(proc);
+ proc = PROC_NULL;
+ }
+
+ NECP_FD_LIST_UNLOCK();
+
+ // Handle the case in which some clients became newly defunct
+ if (!LIST_EMPTY(&defunct_list)) {
+ struct necp_flow_defunct *flow_defunct = NULL;
+ struct necp_flow_defunct *temp_flow_defunct = NULL;
+
+ // For each newly defunct client, send a message to the nexus to remove the flow
+ LIST_FOREACH_SAFE(flow_defunct, &defunct_list, chain, temp_flow_defunct) {
+ if (!uuid_is_null(flow_defunct->nexus_agent)) {
+ int netagent_error = netagent_client_message(flow_defunct->nexus_agent,
+ flow_defunct->flow_id,
+ flow_defunct->proc_pid,
+ flow_defunct->agent_handle,
+ NETAGENT_MESSAGE_TYPE_ABORT_NEXUS);
+ if (netagent_error != 0) {
+ char namebuf[MAXCOMLEN+1];
+ (void) strlcpy(namebuf, "unknown", sizeof (namebuf));
+ proc_name(flow_defunct->proc_pid, namebuf, sizeof (namebuf));
+ NECPLOG((netagent_error == ENOENT ? LOG_DEBUG : LOG_ERR), "necp_update_client abort nexus error (%d) for pid %d %s", netagent_error, flow_defunct->proc_pid, namebuf);
+ }
+ }
+ LIST_REMOVE(flow_defunct, chain);
+ FREE(flow_defunct, M_NECP);
+ }
}
-
- lck_rw_done(&necp_fd_lock);
+ ASSERT(LIST_EMPTY(&defunct_list));
}
void
necp_update_all_clients(void)
{
- if (necp_client_tcall == NULL) {
+ if (necp_client_update_tcall == NULL) {
// Don't try to update clients if the module is not initialized
return;
}
clock_interval_to_deadline(necp_timeout_microseconds, NSEC_PER_USEC, &deadline);
clock_interval_to_absolutetime_interval(necp_timeout_leeway_microseconds, NSEC_PER_USEC, &leeway);
- thread_call_enter_delayed_with_leeway(necp_client_tcall, NULL,
+ thread_call_enter_delayed_with_leeway(necp_client_update_tcall, NULL,
deadline, leeway, THREAD_CALL_DELAY_LEEWAY);
}
+void
+necp_set_client_as_background(proc_t proc,
+ struct fileproc *fp,
+ bool background)
+{
+ bool updated_result = FALSE;
+ struct necp_client *client = NULL;
+
+ if (proc == PROC_NULL) {
+ NECPLOG0(LOG_ERR, "NULL proc");
+ return;
+ }
+
+ if (fp == NULL) {
+ NECPLOG0(LOG_ERR, "NULL fp");
+ return;
+ }
+
+ struct necp_fd_data *client_fd = (struct necp_fd_data *)fp->f_fglob->fg_data;
+ if (client_fd == NULL) {
+ NECPLOG0(LOG_ERR, "Could not find client structure for backgrounded client");
+ return;
+ }
+
+ if (client_fd->necp_fd_type != necp_fd_type_client) {
+ // Not a client fd, ignore
+ NECPLOG0(LOG_ERR, "Not a client fd, ignore");
+ return;
+ }
+
+ NECP_FD_LOCK(client_fd);
+
+ RB_FOREACH(client, _necp_client_tree, &client_fd->clients) {
+ NECP_CLIENT_LOCK(client);
+
+ bool has_assigned_flow = FALSE;
+ struct necp_client_flow_registration *flow_registration = NULL;
+ struct necp_client_flow *search_flow = NULL;
+ RB_FOREACH(flow_registration, _necp_client_flow_tree, &client->flow_registrations) {
+ LIST_FOREACH(search_flow, &flow_registration->flow_list, flow_chain) {
+ if (search_flow->assigned) {
+ has_assigned_flow = TRUE;
+ break;
+ }
+ }
+ }
+
+ if (has_assigned_flow) {
+ client->background = background;
+ client->background_update = TRUE;
+ updated_result = TRUE;
+ }
+
+ NECP_CLIENT_UNLOCK(client);
+ }
+ if (updated_result) {
+ necp_update_client_fd_locked(client_fd, proc, NULL);
+ }
+ NECP_FD_UNLOCK(client_fd);
+}
+
+void
+necp_fd_memstatus(proc_t proc, uint32_t status,
+ struct necp_fd_data *client_fd)
+{
+#pragma unused(proc, status, client_fd)
+ ASSERT(proc != PROC_NULL);
+ ASSERT(client_fd != NULL);
+
+ // Nothing to reap for the process or client for now,
+ // but this is where we would trigger that in future.
+}
+
+void
+necp_fd_defunct(proc_t proc, struct necp_fd_data *client_fd)
+{
+ struct _necp_flow_defunct_list defunct_list;
+
+ ASSERT(proc != PROC_NULL);
+ ASSERT(client_fd != NULL);
+
+ if (client_fd->necp_fd_type != necp_fd_type_client) {
+ // Not a client fd, ignore
+ return;
+ }
+
+ // Our local temporary list
+ LIST_INIT(&defunct_list);
+
+ // Need to hold lock so ntstats defunct the same set of clients
+ NECP_FD_LOCK(client_fd);
+ necp_defunct_client_fd_locked(client_fd, &defunct_list, proc);
+ NECP_FD_UNLOCK(client_fd);
+
+ if (!LIST_EMPTY(&defunct_list)) {
+ struct necp_flow_defunct *flow_defunct = NULL;
+ struct necp_flow_defunct *temp_flow_defunct = NULL;
+
+ // For each defunct client, remove flow from the nexus
+ LIST_FOREACH_SAFE(flow_defunct, &defunct_list, chain, temp_flow_defunct) {
+ if (!uuid_is_null(flow_defunct->nexus_agent)) {
+ int netagent_error = netagent_client_message(flow_defunct->nexus_agent,
+ flow_defunct->flow_id,
+ flow_defunct->proc_pid,
+ flow_defunct->agent_handle,
+ NETAGENT_MESSAGE_TYPE_ABORT_NEXUS);
+ if (netagent_error != 0) {
+ NECPLOG((netagent_error == ENOENT ? LOG_DEBUG : LOG_ERR), "necp_defunct_client abort nexus error (%d)", netagent_error);
+ }
+ }
+ LIST_REMOVE(flow_defunct, chain);
+ FREE(flow_defunct, M_NECP);
+ }
+ }
+ ASSERT(LIST_EMPTY(&defunct_list));
+}
+
static void
necp_client_remove_agent_from_result(struct necp_client *client, uuid_t netagent_uuid)
{
size_t offset = 0;
u_int8_t *result_buffer = client->result;
- while ((offset + sizeof(u_int8_t) + sizeof(u_int32_t)) <= client->result_length) {
+ while ((offset + sizeof(struct necp_tlv_header)) <= client->result_length) {
u_int8_t type = necp_buffer_get_tlv_type(result_buffer, offset);
u_int32_t length = necp_buffer_get_tlv_length(result_buffer, offset);
- size_t tlv_total_length = (sizeof(u_int8_t) + sizeof(u_int32_t) + length);
+ size_t tlv_total_length = (sizeof(struct necp_tlv_header) + length);
if (type == NECP_CLIENT_RESULT_NETAGENT &&
length == sizeof(struct necp_client_result_netagent) &&
(offset + tlv_total_length) <= client->result_length) {
result_buffer + offset + tlv_total_length,
client->result_length - (offset + tlv_total_length));
client->result_length -= tlv_total_length;
- memset(result_buffer + client->result_length, 0, NECP_MAX_CLIENT_RESULT_SIZE - client->result_length);
+ memset(result_buffer + client->result_length, 0, sizeof(client->result) - client->result_length);
continue;
}
}
}
void
-necp_force_update_client(uuid_t client_id, uuid_t remove_netagent_uuid)
+necp_force_update_client(uuid_t client_id, uuid_t remove_netagent_uuid, u_int32_t agent_generation)
{
struct necp_fd_data *client_fd = NULL;
- lck_rw_lock_shared(&necp_fd_lock);
+ NECP_FD_LIST_LOCK_SHARED();
LIST_FOREACH(client_fd, &necp_fd_list, chain) {
bool updated_result = FALSE;
- struct necp_client *client = NULL;
- lck_mtx_lock(&client_fd->fd_lock);
- LIST_FOREACH(client, &client_fd->clients, chain) {
- if (uuid_compare(client->client_id, client_id) == 0) {
- if (!uuid_is_null(remove_netagent_uuid)) {
- necp_client_remove_agent_from_result(client, remove_netagent_uuid);
- }
- client->assigned_result_read = FALSE;
- updated_result = TRUE;
- // Found the client, break
- break;
+ NECP_FD_LOCK(client_fd);
+ struct necp_client *client = necp_client_fd_find_client_and_lock(client_fd, client_id);
+ if (client != NULL) {
+ client->failed_trigger_agent.generation = agent_generation;
+ uuid_copy(client->failed_trigger_agent.netagent_uuid, remove_netagent_uuid);
+ if (!uuid_is_null(remove_netagent_uuid)) {
+ necp_client_remove_agent_from_result(client, remove_netagent_uuid);
}
+ client->result_read = FALSE;
+ // Found the client, break
+ updated_result = TRUE;
+ NECP_CLIENT_UNLOCK(client);
}
if (updated_result) {
necp_fd_notify(client_fd, true);
}
- lck_mtx_unlock(&client_fd->fd_lock);
+ NECP_FD_UNLOCK(client_fd);
if (updated_result) {
// Found the client, break
break;
}
}
- lck_rw_done(&necp_fd_lock);
+ NECP_FD_LIST_UNLOCK();
}
+
/// Interface matching
#define NECP_PARSED_PARAMETERS_INTERESTING_IFNET_FIELDS (NECP_PARSED_PARAMETERS_FIELD_LOCAL_ADDR | \
NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT | \
NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_AGENT | \
NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT | \
+ NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT | \
NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT_TYPE | \
NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_AGENT_TYPE | \
- NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT_TYPE)
-
-#define NECP_PARSED_PARAMETERS_SCOPED_IFNET_FIELDS (NECP_PARSED_PARAMETERS_FIELD_LOCAL_ADDR | \
- NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE | \
- NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT | \
- NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT | \
- NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT_TYPE | \
- NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT_TYPE)
-
-#define NECP_PARSED_PARAMETERS_PREFERRED_IFNET_FIELDS (NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT | \
- NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT_TYPE)
+ NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT_TYPE | \
+ NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT_TYPE)
+
+#define NECP_PARSED_PARAMETERS_SCOPED_FIELDS (NECP_PARSED_PARAMETERS_FIELD_LOCAL_ADDR | \
+ NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE | \
+ NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT | \
+ NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT | \
+ NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT | \
+ NECP_PARSED_PARAMETERS_FIELD_REQUIRED_AGENT_TYPE | \
+ NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT_TYPE | \
+ NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT_TYPE)
+
+#define NECP_PARSED_PARAMETERS_SCOPED_IFNET_FIELDS (NECP_PARSED_PARAMETERS_FIELD_LOCAL_ADDR | \
+ NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE)
+
+#define NECP_PARSED_PARAMETERS_PREFERRED_FIELDS (NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT | \
+ NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT | \
+ NECP_PARSED_PARAMETERS_FIELD_PREFERRED_AGENT_TYPE | \
+ NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT_TYPE)
static bool
necp_ifnet_matches_type(struct ifnet *ifp, u_int8_t interface_type, bool check_delegates)
}
static bool
-necp_necp_ifnet_matches_agent_type(struct ifnet *ifp, const char *agent_domain, const char *agent_type, bool check_delegates)
+necp_ifnet_matches_agent_type(struct ifnet *ifp, const char *agent_domain, const char *agent_type, bool check_delegates)
{
struct ifnet *check_ifp = ifp;
char if_agent_type[NETAGENT_TYPESIZE] = { 0 };
if (netagent_get_agent_domain_and_type(check_ifp->if_agentids[index], if_agent_domain, if_agent_type)) {
- if ((strlen(agent_domain) == 0 ||
- strncmp(if_agent_domain, agent_domain, NETAGENT_DOMAINSIZE) == 0) &&
- (strlen(agent_type) == 0 ||
- strncmp(if_agent_type, agent_type, NETAGENT_TYPESIZE) == 0)) {
- ifnet_lock_done(check_ifp);
- return (TRUE);
- }
+ if (necp_agent_types_match(agent_domain, agent_type, if_agent_domain, if_agent_type)) {
+ ifnet_lock_done(check_ifp);
+ return (TRUE);
+ }
}
}
}
return (matched_local_address);
}
+static bool
+necp_interface_type_is_primary_eligible(u_int8_t interface_type)
+{
+ switch (interface_type) {
+ // These types can never be primary, so a client requesting these types is allowed
+ // to match an interface that isn't currently eligible to be primary (has default
+ // route, dns, etc)
+ case IFRTYPE_FUNCTIONAL_WIFI_AWDL:
+ case IFRTYPE_FUNCTIONAL_INTCOPROC:
+ return false;
+ default:
+ break;
+ }
+ return true;
+}
+
+#define NECP_IFP_IS_ON_ORDERED_LIST(_ifp) ((_ifp)->if_ordered_link.tqe_next != NULL || (_ifp)->if_ordered_link.tqe_prev != NULL)
+
+// Secondary interface flag indicates that the interface is being
+// used for multipath or a listener as an extra path
static bool
necp_ifnet_matches_parameters(struct ifnet *ifp,
struct necp_client_parsed_parameters *parsed_parameters,
- u_int32_t *preferred_count)
+ u_int32_t *preferred_count,
+ bool secondary_interface)
{
if (preferred_count) {
*preferred_count = 0;
}
}
- if (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE) {
- for (int i = 0; i < NECP_MAX_PARSED_PARAMETERS; i++) {
- if (parsed_parameters->required_interface_types[i] == 0) {
- break;
- }
-
- if (!necp_ifnet_matches_type(ifp, parsed_parameters->required_interface_types[i], FALSE)) {
- return (FALSE);
- }
+ if (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_FLAGS) {
+ if ((parsed_parameters->flags & NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_EXPENSIVE) &&
+ IFNET_IS_EXPENSIVE(ifp)) {
+ return (FALSE);
}
}
+ if ((!secondary_interface || // Enforce interface type if this is the primary interface
+ !(parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_FLAGS) || // or if there are no flags
+ !(parsed_parameters->flags & NECP_CLIENT_PARAMETER_FLAG_ONLY_PRIMARY_REQUIRES_TYPE)) && // or if the flags don't give an exception
+ (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE) &&
+ !necp_ifnet_matches_type(ifp, parsed_parameters->required_interface_type, FALSE)) {
+ return (FALSE);
+ }
+
if (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_PROHIBITED_IFTYPE) {
for (int i = 0; i < NECP_MAX_PARSED_PARAMETERS; i++) {
if (parsed_parameters->prohibited_interface_types[i] == 0) {
break;
}
- if (!necp_necp_ifnet_matches_agent_type(ifp, parsed_parameters->required_netagent_types[i].netagent_domain, parsed_parameters->required_netagent_types[i].netagent_type, FALSE)) {
+ if (!necp_ifnet_matches_agent_type(ifp, parsed_parameters->required_netagent_types[i].netagent_domain, parsed_parameters->required_netagent_types[i].netagent_type, FALSE)) {
return (FALSE);
}
}
break;
}
- if (necp_necp_ifnet_matches_agent_type(ifp, parsed_parameters->prohibited_netagent_types[i].netagent_domain, parsed_parameters->prohibited_netagent_types[i].netagent_type, TRUE)) {
+ if (necp_ifnet_matches_agent_type(ifp, parsed_parameters->prohibited_netagent_types[i].netagent_domain, parsed_parameters->prohibited_netagent_types[i].netagent_type, TRUE)) {
return (FALSE);
}
}
break;
}
- if (necp_necp_ifnet_matches_agent_type(ifp, parsed_parameters->preferred_netagent_types[i].netagent_domain, parsed_parameters->preferred_netagent_types[i].netagent_type, TRUE)) {
+ if (necp_ifnet_matches_agent_type(ifp, parsed_parameters->preferred_netagent_types[i].netagent_domain, parsed_parameters->preferred_netagent_types[i].netagent_type, TRUE)) {
+ (*preferred_count)++;
+ }
+ }
+ }
+
+ if (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT) {
+ for (int i = 0; i < NECP_MAX_PARSED_PARAMETERS; i++) {
+ if (uuid_is_null(parsed_parameters->avoided_netagents[i])) {
+ break;
+ }
+
+ if (!necp_ifnet_matches_agent(ifp, &parsed_parameters->avoided_netagents[i], TRUE)) {
+ (*preferred_count)++;
+ }
+ }
+ }
+
+ if (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_AVOIDED_AGENT_TYPE) {
+ for (int i = 0; i < NECP_MAX_PARSED_PARAMETERS; i++) {
+ if (strlen(parsed_parameters->avoided_netagent_types[i].netagent_domain) == 0 &&
+ strlen(parsed_parameters->avoided_netagent_types[i].netagent_type) == 0) {
+ break;
+ }
+
+ if (!necp_ifnet_matches_agent_type(ifp, parsed_parameters->avoided_netagent_types[i].netagent_domain,
+ parsed_parameters->avoided_netagent_types[i].netagent_type, TRUE)) {
(*preferred_count)++;
}
}
}
static bool
-necp_find_matching_interface_index(struct necp_client_parsed_parameters *parsed_parameters, u_int *return_ifindex)
+necp_find_matching_interface_index(struct necp_client_parsed_parameters *parsed_parameters,
+ u_int *return_ifindex, bool *validate_agents)
{
struct ifnet *ifp = NULL;
u_int32_t best_preferred_count = 0;
return (TRUE);
}
- has_preferred_fields = (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_PREFERRED_IFNET_FIELDS);
+ has_preferred_fields = (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_PREFERRED_FIELDS);
// We have interesting parameters to parse and find a matching interface
ifnet_head_lock_shared();
- if (!(parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_SCOPED_IFNET_FIELDS)) {
+ if (!(parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_SCOPED_FIELDS)) {
// We do have fields to match, but they are only prohibitory
- // If the first interface in the list matches, we don't need to scope
+ // If the first interface in the list matches, or there are no ordered interfaces, we don't need to scope
ifp = TAILQ_FIRST(&ifnet_ordered_head);
- if (ifp && necp_ifnet_matches_parameters(ifp, parsed_parameters, NULL)) {
+ if (ifp == NULL || necp_ifnet_matches_parameters(ifp, parsed_parameters, NULL, false)) {
// Don't set return_ifindex, so the client doesn't need to scope
ifnet_head_done();
return (TRUE);
// First check the ordered interface list
TAILQ_FOREACH(ifp, &ifnet_ordered_head, if_ordered_link) {
u_int32_t preferred_count = 0;
- if (necp_ifnet_matches_parameters(ifp, parsed_parameters, &preferred_count)) {
+ if (necp_ifnet_matches_parameters(ifp, parsed_parameters, &preferred_count, false)) {
if (preferred_count > best_preferred_count ||
*return_ifindex == 0) {
}
// Then check the remaining interfaces
- if ((parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_SCOPED_IFNET_FIELDS) &&
- !(parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE) &&
+ if ((parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_SCOPED_FIELDS) &&
+ ((!(parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_FIELD_REQUIRED_IFTYPE)) ||
+ !necp_interface_type_is_primary_eligible(parsed_parameters->required_interface_type)) &&
*return_ifindex == 0) {
TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
u_int32_t preferred_count = 0;
- if (ifp->if_ordered_link.tqe_next != NULL ||
- ifp->if_ordered_link.tqe_prev != NULL) {
+ if (NECP_IFP_IS_ON_ORDERED_LIST(ifp)) {
// This interface was in the ordered list, skip
continue;
}
- if (necp_ifnet_matches_parameters(ifp, parsed_parameters, &preferred_count)) {
- if (preferred_count > best_preferred_count ||
- *return_ifindex == 0) {
-
- // Everything matched, and is most preferred. Return this interface.
- *return_ifindex = ifp->if_index;
- best_preferred_count = preferred_count;
-
- if (!has_preferred_fields) {
- break;
- }
- }
- }
- }
- }
-
- ifnet_head_done();
-
- if ((parsed_parameters->valid_fields == (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_PREFERRED_IFNET_FIELDS)) &&
- best_preferred_count == 0) {
- // If only has preferred fields, and nothing was found, clear the interface index and return TRUE
- *return_ifindex = 0;
- return (TRUE);
- }
-
- return (*return_ifindex != 0);
-}
-
-static void
-necp_find_netstat_data(struct necp_client *client, union necp_sockaddr_union *local, union necp_sockaddr_union *remote, u_int32_t *ifindex, uuid_t euuid, u_int32_t *traffic_class)
-{
- size_t offset = 0;
- u_int8_t *parameters;
- u_int32_t parameters_size;
-
- parameters = client->parameters;
- parameters_size = (u_int32_t)client->parameters_length;
-
- while ((offset + sizeof(u_int8_t) + sizeof(u_int32_t)) <= parameters_size) {
- 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) {
- u_int8_t *value = necp_buffer_get_tlv_value(parameters, offset, NULL);
- if (value != NULL) {
- switch (type) {
- case NECP_CLIENT_PARAMETER_REAL_APPLICATION: {
- if (length >= sizeof(uuid_t)) {
- uuid_copy(euuid, value);
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_TRAFFIC_CLASS: {
- if (length >= sizeof(u_int32_t)) {
- memcpy(traffic_class, value, sizeof(u_int32_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) {
- *ifindex = bound_interface->if_index;
- ifnet_release(bound_interface);
- }
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_LOCAL_ADDRESS: {
- if (length >= sizeof(struct necp_policy_condition_addr)) {
- struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value;
- memcpy(local, &address_struct->address, sizeof(address_struct->address));
- }
- break;
- }
- case NECP_CLIENT_PARAMETER_REMOTE_ADDRESS: {
- if (length >= sizeof(struct necp_policy_condition_addr)) {
- struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value;
- memcpy(remote, &address_struct->address, sizeof(address_struct->address));
- }
- break;
- }
- default: {
- break;
- }
- }
- }
- }
- offset += sizeof(u_int8_t) + sizeof(u_int32_t) + length;
- }
-}
-
-static void
-necp_fillout_current_process_details(u_int32_t *pid, u_int64_t *upid, unsigned char *uuid, char *pname, size_t len)
-{
- *pid = proc_selfpid();
- *upid = proc_uniqueid(current_proc());
- proc_selfname(pname, (int) len);
- proc_getexecutableuuid(current_proc(), uuid, sizeof(uuid_t));
-}
-
-// Called from NetworkStatistics when it wishes to collect latest information for a TCP flow.
-// It is a responsibility of NetworkStatistics to have previously zeroed any supplied memory.
-static bool
-necp_request_tcp_netstats(userland_stats_provider_context *ctx,
- nstat_counts *countsp,
- void *metadatap)
-{
- if (ctx == NULL) {
- return false;
- }
-
- struct necp_client *client = (struct necp_client *)ctx;
- struct necp_tcp_stats *tcpstats = (struct necp_tcp_stats *)client->stats_area;
- if (tcpstats == NULL) {
- return false;
- }
-
- if (countsp) {
- *countsp = *((struct nstat_counts *)&tcpstats->necp_tcp_counts);
- }
-
- if (metadatap) {
- nstat_tcp_descriptor *desc = (nstat_tcp_descriptor *)metadatap;
-
- // Metadata for the process
- necp_fillout_current_process_details(&desc->pid, &desc->upid, desc->uuid, desc->pname, sizeof(desc->pname));
-
- // Metadata that the necp client should have in TLV format.
- necp_find_netstat_data(client, (union necp_sockaddr_union *)&desc->local, (union necp_sockaddr_union *)&desc->remote, &desc->ifindex, desc->euuid, &desc->traffic_class);
-
- // Basic metadata
- desc->rcvbufsize = tcpstats->necp_tcp_basic.rcvbufsize;
- desc->rcvbufused = tcpstats->necp_tcp_basic.rcvbufused;
- desc->eupid = tcpstats->necp_tcp_basic.eupid;
- desc->epid = tcpstats->necp_tcp_basic.epid;
- memcpy(desc->vuuid, tcpstats->necp_tcp_basic.vuuid, sizeof(desc->vuuid));
- desc->ifnet_properties = tcpstats->necp_tcp_basic.ifnet_properties;
+ if (necp_ifnet_matches_parameters(ifp, parsed_parameters, &preferred_count, false)) {
+ if (preferred_count > best_preferred_count ||
+ *return_ifindex == 0) {
- // Additional TCP specific data
- desc->sndbufsize = tcpstats->necp_tcp_extra.sndbufsize;
- desc->sndbufused = tcpstats->necp_tcp_extra.sndbufused;
- desc->txunacked = tcpstats->necp_tcp_extra.txunacked;
- desc->txwindow = tcpstats->necp_tcp_extra.txwindow;
- desc->txcwindow = tcpstats->necp_tcp_extra.txcwindow;
- desc->traffic_mgt_flags = tcpstats->necp_tcp_extra.traffic_mgt_flags;
+ // Everything matched, and is most preferred. Return this interface.
+ *return_ifindex = ifp->if_index;
+ best_preferred_count = preferred_count;
- if (tcpstats->necp_tcp_extra.cc_alg_index < TCP_CC_ALGO_COUNT) {
- strlcpy(desc->cc_algo, tcp_cc_algo_list[tcpstats->necp_tcp_extra.cc_alg_index]->name, sizeof(desc->cc_algo));
- } else {
- strlcpy(desc->cc_algo, "unknown", sizeof(desc->cc_algo));
+ if (!has_preferred_fields) {
+ break;
+ }
+ }
+ }
}
-
- desc->connstatus.write_probe_failed = tcpstats->necp_tcp_extra.probestatus.write_probe_failed;
- desc->connstatus.read_probe_failed = tcpstats->necp_tcp_extra.probestatus.read_probe_failed;
- desc->connstatus.conn_probe_failed = tcpstats->necp_tcp_extra.probestatus.conn_probe_failed;
}
- return true;
-}
-// Called from NetworkStatistics when it wishes to collect latest information for a UDP flow.
-static bool
-necp_request_udp_netstats(userland_stats_provider_context *ctx,
- nstat_counts *countsp,
- void *metadatap)
-{
- if (ctx == NULL) {
- return false;
- }
+ ifnet_head_done();
- struct necp_client *client = (struct necp_client *)ctx;
- struct necp_udp_stats *udpstats = (struct necp_udp_stats *)client->stats_area;
- if (udpstats == NULL) {
- return false;
+ if ((parsed_parameters->valid_fields == (parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_PREFERRED_FIELDS)) &&
+ best_preferred_count == 0) {
+ // If only has preferred fields, and nothing was found, clear the interface index and return TRUE
+ *return_ifindex = 0;
+ return (TRUE);
}
- if (countsp) {
- *countsp = *((struct nstat_counts *)&udpstats->necp_udp_counts);
+ if (*return_ifindex == 0 &&
+ !(parsed_parameters->valid_fields & NECP_PARSED_PARAMETERS_SCOPED_IFNET_FIELDS)) {
+ // Has required fields, but not including specific interface fields. Pass for now, and check
+ // to see if agents are satisfied by policy.
+ *validate_agents = TRUE;
+ return (TRUE);
}
- if (metadatap) {
- nstat_udp_descriptor *desc = (nstat_udp_descriptor *)metadatap;
-
- // Metadata for the process
- necp_fillout_current_process_details(&desc->pid, &desc->upid, desc->uuid, desc->pname, sizeof(desc->pname));
-
- // Metadata that the necp client should have in TLV format.
- necp_find_netstat_data(client, (union necp_sockaddr_union *)&desc->local, (union necp_sockaddr_union *)&desc->remote, &desc->ifindex, desc->euuid, &desc->traffic_class);
-
- // Basic metadata is all that is required for UDP
- desc->rcvbufsize = udpstats->necp_udp_basic.rcvbufsize;
- desc->rcvbufused = udpstats->necp_udp_basic.rcvbufused;
- desc->eupid = udpstats->necp_udp_basic.eupid;
- desc->epid = udpstats->necp_udp_basic.epid;
- memcpy(desc->vuuid, udpstats->necp_udp_basic.vuuid, sizeof(desc->euuid));
- desc->ifnet_properties = udpstats->necp_udp_basic.ifnet_properties;
- }
- return true;
+ return (*return_ifindex != 0);
}
+
static int
necp_skywalk_priv_check_cred(proc_t p, kauth_cred_t cred)
{
struct fileproc *fp = NULL;
int fd = -1;
- if (uap->flags & NECP_OPEN_FLAG_OBSERVER) {
+ if (uap->flags & NECP_OPEN_FLAG_OBSERVER ||
+ uap->flags & NECP_OPEN_FLAG_PUSH_OBSERVER) {
if (necp_skywalk_priv_check_cred(p, kauth_cred_get()) != 0 &&
- priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_NETWORK_STATISTICS, 0) != 0) {
+ priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_NETWORK_STATISTICS, 0) != 0) {
NECPLOG0(LOG_ERR, "Client does not hold necessary entitlement to observe other NECP clients");
error = EACCES;
goto done;
goto done;
}
- if ((fd_data = _MALLOC(sizeof(struct necp_fd_data), M_NECP,
- M_WAITOK | M_ZERO)) == NULL) {
+ if ((fd_data = zalloc(necp_client_fd_zone)) == NULL) {
error = ENOMEM;
goto done;
}
+ memset(fd_data, 0, sizeof(*fd_data));
+
+ fd_data->necp_fd_type = necp_fd_type_client;
fd_data->flags = uap->flags;
- LIST_INIT(&fd_data->clients);
+ RB_INIT(&fd_data->clients);
+ RB_INIT(&fd_data->flows);
+ TAILQ_INIT(&fd_data->update_list);
lck_mtx_init(&fd_data->fd_lock, necp_fd_mtx_grp, necp_fd_mtx_attr);
klist_init(&fd_data->si.si_note);
fd_data->proc_pid = proc_pid(p);
*fdflags(p, fd) |= (UF_EXCLOSE | UF_FORKCLOSE);
procfdtbl_releasefd(p, fd, NULL);
fp_drop(p, fd, fp, 1);
- proc_fdunlock(p);
*retval = fd;
- lck_rw_lock_exclusive(&necp_fd_lock);
- LIST_INSERT_HEAD(&necp_fd_list, fd_data, chain);
- lck_rw_done(&necp_fd_lock);
+ if (fd_data->flags & NECP_OPEN_FLAG_PUSH_OBSERVER) {
+ NECP_OBSERVER_LIST_LOCK_EXCLUSIVE();
+ LIST_INSERT_HEAD(&necp_fd_observer_list, fd_data, chain);
+ OSIncrementAtomic(&necp_observer_fd_count);
+ NECP_OBSERVER_LIST_UNLOCK();
+
+ // Walk all existing clients and add them
+ NECP_CLIENT_TREE_LOCK_SHARED();
+ struct necp_client *existing_client = NULL;
+ RB_FOREACH(existing_client, _necp_client_global_tree, &necp_client_global_tree) {
+ NECP_CLIENT_LOCK(existing_client);
+ necp_client_update_observer_add_internal(fd_data, existing_client);
+ necp_client_update_observer_update_internal(fd_data, existing_client);
+ NECP_CLIENT_UNLOCK(existing_client);
+ }
+ NECP_CLIENT_TREE_UNLOCK();
+ } else {
+ NECP_FD_LIST_LOCK_EXCLUSIVE();
+ LIST_INSERT_HEAD(&necp_fd_list, fd_data, chain);
+ OSIncrementAtomic(&necp_client_fd_count);
+ NECP_FD_LIST_UNLOCK();
+ }
+
+ proc_fdunlock(p);
done:
if (error != 0) {
fp = NULL;
}
if (fd_data != NULL) {
- FREE(fd_data, M_NECP);
+ zfree(necp_client_fd_zone, fd_data);
fd_data = NULL;
}
}
}
static int
-necp_client_add(struct necp_fd_data *fd_data, struct necp_client_action_args *uap, int *retval)
+necp_client_add(struct proc *p, struct necp_fd_data *fd_data, struct necp_client_action_args *uap, int *retval)
{
int error = 0;
struct necp_client *client = NULL;
+ if (fd_data->flags & NECP_OPEN_FLAG_PUSH_OBSERVER) {
+ NECPLOG0(LOG_ERR, "NECP client observers with push enabled may not add their own clients");
+ return (EINVAL);
+ }
+
if (uap->client_id == 0 || uap->client_id_len != sizeof(uuid_t) ||
uap->buffer_size == 0 || uap->buffer_size > NECP_MAX_CLIENT_PARAMETERS_SIZE || uap->buffer == 0) {
- error = EINVAL;
- goto done;
+ return (EINVAL);
}
if ((client = _MALLOC(sizeof(struct necp_client) + uap->buffer_size, M_NECP,
goto done;
}
+ lck_mtx_init(&client->lock, necp_fd_mtx_grp, necp_fd_mtx_attr);
+ lck_mtx_init(&client->route_lock, necp_fd_mtx_grp, necp_fd_mtx_attr);
+ necp_client_retain(client); // Hold our reference until close
+
client->parameters_length = uap->buffer_size;
+ client->proc_pid = fd_data->proc_pid; // Save off proc pid in case the client will persist past fd
+ client->agent_handle = (void *)fd_data;
+ client->platform_binary = ((csproc_get_platform_binary(p) == 0) ? 0 : 1);
- uuid_generate_random(client->client_id);
+ necp_generate_client_id(client->client_id, false);
LIST_INIT(&client->assertion_list);
+ RB_INIT(&client->flow_registrations);
error = copyout(client->client_id, uap->client_id, sizeof(uuid_t));
if (error) {
goto done;
}
- lck_mtx_lock(&fd_data->fd_lock);
- LIST_INSERT_HEAD(&fd_data->clients, client, chain);
+ necp_client_update_observer_add(client);
+
+ NECP_FD_LOCK(fd_data);
+ RB_INSERT(_necp_client_tree, &fd_data->clients, client);
+ OSIncrementAtomic(&necp_client_count);
+ NECP_CLIENT_TREE_LOCK_EXCLUSIVE();
+ RB_INSERT(_necp_client_global_tree, &necp_client_global_tree, client);
+ NECP_CLIENT_TREE_UNLOCK();
// Prime the client result
- (void)necp_update_client_result(current_proc(), client);
- lck_mtx_unlock(&fd_data->fd_lock);
+ NECP_CLIENT_LOCK(client);
+ (void)necp_update_client_result(current_proc(), fd_data, client, NULL);
+ NECP_CLIENT_UNLOCK(client);
+ NECP_FD_UNLOCK(fd_data);
done:
if (error != 0) {
if (client != NULL) {
necp_client_remove(struct necp_fd_data *fd_data, struct necp_client_action_args *uap, int *retval)
{
int error = 0;
- struct necp_client *client = NULL;
- struct necp_client *temp_client = NULL;
- uuid_t client_id;
+ uuid_t client_id = {};
+ struct ifnet_stats_per_flow flow_ifnet_stats = {};
if (uap->client_id == 0 || uap->client_id_len != sizeof(uuid_t)) {
error = EINVAL;
goto done;
}
- lck_mtx_lock(&fd_data->fd_lock);
- LIST_FOREACH_SAFE(client, &fd_data->clients, chain, temp_client) {
- if (uuid_compare(client->client_id, client_id) == 0) {
- necp_destroy_client(client);
+ if (uap->buffer != 0 && uap->buffer_size == sizeof(flow_ifnet_stats)) {
+ error = copyin(uap->buffer, &flow_ifnet_stats, uap->buffer_size);
+ if (error) {
+ NECPLOG(LOG_ERR, "necp_client_remove flow_ifnet_stats copyin error (%d)", error);
+ // Not fatal; make sure to zero-out stats in case of partial copy
+ memset(&flow_ifnet_stats, 0, sizeof (flow_ifnet_stats));
+ error = 0;
+ }
+ } else if (uap->buffer != 0) {
+ NECPLOG(LOG_ERR, "necp_client_remove unexpected parameters length (%zu)", uap->buffer_size);
+ }
+
+ NECP_FD_LOCK(fd_data);
+
+ pid_t pid = fd_data->proc_pid;
+ struct necp_client *client = necp_client_fd_find_client_unlocked(fd_data, client_id);
+ if (client != NULL) {
+ // Remove any flow registrations that match
+ struct necp_client_flow_registration *flow_registration = NULL;
+ struct necp_client_flow_registration *temp_flow_registration = NULL;
+ RB_FOREACH_SAFE(flow_registration, _necp_fd_flow_tree, &fd_data->flows, temp_flow_registration) {
+ if (flow_registration->client == client) {
+ NECP_FLOW_TREE_LOCK_EXCLUSIVE();
+ RB_REMOVE(_necp_client_flow_global_tree, &necp_client_flow_global_tree, flow_registration);
+ NECP_FLOW_TREE_UNLOCK();
+ RB_REMOVE(_necp_fd_flow_tree, &fd_data->flows, flow_registration);
+ }
}
+ // Remove client from lists
+ NECP_CLIENT_TREE_LOCK_EXCLUSIVE();
+ RB_REMOVE(_necp_client_global_tree, &necp_client_global_tree, client);
+ NECP_CLIENT_TREE_UNLOCK();
+ RB_REMOVE(_necp_client_tree, &fd_data->clients, client);
+ }
+
+
+ NECP_FD_UNLOCK(fd_data);
+
+ if (client != NULL) {
+ ASSERT(error == 0);
+ necp_destroy_client(client, pid, true);
+ } else {
+ error = ENOENT;
+ NECPLOG(LOG_ERR, "necp_client_remove invalid client_id (%d)", error);
}
- lck_mtx_unlock(&fd_data->fd_lock);
done:
*retval = error;
return (error);
}
+
+static int
+necp_client_check_tcp_heuristics(struct necp_client *client, struct necp_client_flow *flow, u_int32_t *flags, u_int8_t *tfo_cookie, u_int8_t *tfo_cookie_len)
+{
+ struct necp_client_parsed_parameters parsed_parameters;
+ int error = 0;
+
+ error = necp_client_parse_parameters(client->parameters,
+ (u_int32_t)client->parameters_length,
+ &parsed_parameters);
+ if (error) {
+ NECPLOG(LOG_ERR, "necp_client_parse_parameters error (%d)", error);
+ return (error);
+ }
+
+ if ((flow->remote_addr.sa.sa_family != AF_INET &&
+ flow->remote_addr.sa.sa_family != AF_INET6) ||
+ (flow->local_addr.sa.sa_family != AF_INET &&
+ flow->local_addr.sa.sa_family != AF_INET6)) {
+ return (EINVAL);
+ }
+
+ NECP_CLIENT_ROUTE_LOCK(client);
+
+ if (client->current_route == NULL) {
+ error = ENOENT;
+ goto do_unlock;
+ }
+
+ bool check_ecn = false;
+ do {
+ if ((parsed_parameters.flags & NECP_CLIENT_PARAMETER_FLAG_ECN_ENABLE) ==
+ NECP_CLIENT_PARAMETER_FLAG_ECN_ENABLE) {
+ check_ecn = true;
+ break;
+ }
+
+ if ((parsed_parameters.flags & NECP_CLIENT_PARAMETER_FLAG_ECN_DISABLE) ==
+ NECP_CLIENT_PARAMETER_FLAG_ECN_DISABLE) {
+ break;
+ }
+
+ if (client->current_route != NULL) {
+ if (client->current_route->rt_ifp->if_eflags & IFEF_ECN_ENABLE) {
+ check_ecn = true;
+ break;
+ }
+ if (client->current_route->rt_ifp->if_eflags & IFEF_ECN_DISABLE) {
+ break;
+ }
+ }
+
+ bool inbound = ((parsed_parameters.flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER) == 0);
+ if ((inbound && tcp_ecn_inbound == 1) ||
+ (!inbound && tcp_ecn_outbound == 1)) {
+ check_ecn = true;
+ }
+ } while (false);
+
+ if (check_ecn) {
+ if (tcp_heuristic_do_ecn_with_address(client->current_route->rt_ifp,
+ (union sockaddr_in_4_6 *)&flow->local_addr)) {
+ *flags |= NECP_CLIENT_RESULT_FLAG_ECN_ENABLED;
+ }
+ }
+
+ if ((parsed_parameters.flags & NECP_CLIENT_PARAMETER_FLAG_TFO_ENABLE) ==
+ NECP_CLIENT_PARAMETER_FLAG_TFO_ENABLE) {
+
+ if (!tcp_heuristic_do_tfo_with_address(client->current_route->rt_ifp,
+ (union sockaddr_in_4_6 *)&flow->local_addr,
+ (union sockaddr_in_4_6 *)&flow->remote_addr,
+ tfo_cookie, tfo_cookie_len)) {
+ *flags |= NECP_CLIENT_RESULT_FLAG_FAST_OPEN_BLOCKED;
+ *tfo_cookie_len = 0;
+ }
+ } else {
+ *flags |= NECP_CLIENT_RESULT_FLAG_FAST_OPEN_BLOCKED;
+ *tfo_cookie_len = 0;
+ }
+do_unlock:
+ NECP_CLIENT_ROUTE_UNLOCK(client);
+
+ return (error);
+}
+
+static size_t
+necp_client_calculate_flow_tlv_size(struct necp_client_flow_registration *flow_registration)
+{
+ size_t assigned_results_size = 0;
+ struct necp_client_flow *flow = NULL;
+ LIST_FOREACH(flow, &flow_registration->flow_list, flow_chain) {
+ if (flow->assigned) {
+ size_t header_length = 0;
+ if (flow->nexus) {
+ header_length = sizeof(struct necp_client_nexus_flow_header);
+ } else {
+ header_length = sizeof(struct necp_client_flow_header);
+ }
+ assigned_results_size += (header_length + flow->assigned_results_length);
+
+ if (flow->has_protoctl_event) {
+ assigned_results_size += sizeof(struct necp_client_flow_protoctl_event_header);
+ }
+ }
+ }
+ return assigned_results_size;
+}
+
+static int
+necp_client_fillout_flow_tlvs(struct necp_client *client,
+ bool client_is_observed,
+ struct necp_client_flow_registration *flow_registration,
+ struct necp_client_action_args *uap,
+ size_t *assigned_results_cursor)
+{
+ int error = 0;
+ struct necp_client_flow *flow = NULL;
+ LIST_FOREACH(flow, &flow_registration->flow_list, flow_chain) {
+ if (flow->assigned) {
+ // Write TLV headers
+ struct necp_client_nexus_flow_header header = {};
+ u_int32_t length = 0;
+ u_int32_t flags = 0;
+ u_int8_t tfo_cookie_len = 0;
+ u_int8_t type = 0;
+
+ type = NECP_CLIENT_RESULT_FLOW_ID;
+ length = sizeof(header.flow_header.flow_id);
+ memcpy(&header.flow_header.flow_id_tlv_header.type, &type, sizeof(type));
+ memcpy(&header.flow_header.flow_id_tlv_header.length, &length, sizeof(length));
+ uuid_copy(header.flow_header.flow_id, flow_registration->registration_id);
+
+ if (flow->nexus) {
+ if (flow->check_tcp_heuristics) {
+ u_int8_t tfo_cookie[NECP_TFO_COOKIE_LEN_MAX];
+ tfo_cookie_len = NECP_TFO_COOKIE_LEN_MAX;
+
+ if (necp_client_check_tcp_heuristics(client, flow, &flags,
+ tfo_cookie, &tfo_cookie_len) != 0) {
+ tfo_cookie_len = 0;
+ } else {
+ flow->check_tcp_heuristics = FALSE;
+
+ if (tfo_cookie_len != 0) {
+ type = NECP_CLIENT_RESULT_TFO_COOKIE;
+ length = tfo_cookie_len;
+ memcpy(&header.tfo_cookie_tlv_header.type, &type, sizeof(type));
+ memcpy(&header.tfo_cookie_tlv_header.length, &length, sizeof(length));
+ memcpy(&header.tfo_cookie_value, tfo_cookie, tfo_cookie_len);
+ }
+ }
+ }
+ }
+
+ size_t header_length = 0;
+ if (flow->nexus) {
+ if (tfo_cookie_len != 0) {
+ header_length = sizeof(struct necp_client_nexus_flow_header) - (NECP_TFO_COOKIE_LEN_MAX - tfo_cookie_len);
+ } else {
+ header_length = sizeof(struct necp_client_nexus_flow_header) - sizeof(struct necp_tlv_header) - NECP_TFO_COOKIE_LEN_MAX;
+ }
+ } else {
+ header_length = sizeof(struct necp_client_flow_header);
+ }
+
+ type = NECP_CLIENT_RESULT_FLAGS;
+ length = sizeof(header.flow_header.flags_value);
+ memcpy(&header.flow_header.flags_tlv_header.type, &type, sizeof(type));
+ memcpy(&header.flow_header.flags_tlv_header.length, &length, sizeof(length));
+ if (flow->assigned) {
+ flags |= NECP_CLIENT_RESULT_FLAG_FLOW_ASSIGNED;
+ }
+ if (flow->viable) {
+ flags |= NECP_CLIENT_RESULT_FLAG_FLOW_VIABLE;
+ }
+ if (flow_registration->defunct) {
+ flags |= NECP_CLIENT_RESULT_FLAG_DEFUNCT;
+ }
+ flags |= flow->necp_flow_flags;
+ memcpy(&header.flow_header.flags_value, &flags, sizeof(flags));
+
+ type = NECP_CLIENT_RESULT_INTERFACE;
+ length = sizeof(header.flow_header.interface_value);
+ memcpy(&header.flow_header.interface_tlv_header.type, &type, sizeof(type));
+ memcpy(&header.flow_header.interface_tlv_header.length, &length, sizeof(length));
+
+ struct necp_client_result_interface interface_struct;
+ interface_struct.generation = 0;
+ interface_struct.index = flow->interface_index;
+
+ memcpy(&header.flow_header.interface_value, &interface_struct, sizeof(interface_struct));
+ if (flow->nexus) {
+ type = NECP_CLIENT_RESULT_NETAGENT;
+ length = sizeof(header.agent_value);
+ memcpy(&header.agent_tlv_header.type, &type, sizeof(type));
+ memcpy(&header.agent_tlv_header.length, &length, sizeof(length));
+
+ struct necp_client_result_netagent agent_struct;
+ agent_struct.generation = 0;
+ uuid_copy(agent_struct.netagent_uuid, flow->u.nexus_agent);
+
+ memcpy(&header.agent_value, &agent_struct, sizeof(agent_struct));
+ }
+
+ // Don't include outer TLV header in length field
+ type = NECP_CLIENT_RESULT_FLOW;
+ length = (header_length - sizeof(struct necp_tlv_header) + flow->assigned_results_length);
+ if (flow->has_protoctl_event) {
+ length += sizeof(struct necp_client_flow_protoctl_event_header);
+ }
+ memcpy(&header.flow_header.outer_header.type, &type, sizeof(type));
+ memcpy(&header.flow_header.outer_header.length, &length, sizeof(length));
+
+ error = copyout(&header, uap->buffer + client->result_length + *assigned_results_cursor, header_length);
+ if (error) {
+ NECPLOG(LOG_ERR, "necp_client_copy assigned results tlv_header copyout error (%d)", error);
+ return (error);
+ }
+ *assigned_results_cursor += header_length;
+
+ if (flow->assigned_results && flow->assigned_results_length) {
+ // Write inner TLVs
+ error = copyout(flow->assigned_results, uap->buffer + client->result_length + *assigned_results_cursor,
+ flow->assigned_results_length);
+ if (error) {
+ NECPLOG(LOG_ERR, "necp_client_copy assigned results copyout error (%d)", error);
+ return (error);
+ }
+ }
+ *assigned_results_cursor += flow->assigned_results_length;
+
+ /* Read the protocol event and reset it */
+ if (flow->has_protoctl_event) {
+ struct necp_client_flow_protoctl_event_header protoctl_event_header = {};
+
+ type = NECP_CLIENT_RESULT_PROTO_CTL_EVENT;
+ length = sizeof(protoctl_event_header.protoctl_event);
+
+ memcpy(&protoctl_event_header.protoctl_tlv_header.type, &type, sizeof(type));
+ memcpy(&protoctl_event_header.protoctl_tlv_header.length, &length, sizeof(length));
+ memcpy(&protoctl_event_header.protoctl_event, &flow->protoctl_event,
+ sizeof(flow->protoctl_event));
+
+ error = copyout(&protoctl_event_header, uap->buffer + client->result_length + *assigned_results_cursor,
+ sizeof(protoctl_event_header));
+
+ if (error) {
+ NECPLOG(LOG_ERR, "necp_client_copy protocol control event results"
+ " tlv_header copyout error (%d)", error);
+ return (error);
+ }
+ *assigned_results_cursor += sizeof(protoctl_event_header);
+ flow->has_protoctl_event = FALSE;
+ flow->protoctl_event.protoctl_event_code = 0;
+ flow->protoctl_event.protoctl_event_val = 0;
+ flow->protoctl_event.protoctl_event_tcp_seq_num = 0;
+ }
+ }
+ }
+ if (!client_is_observed) {
+ flow_registration->flow_result_read = TRUE;
+ }
+ return (0);
+}
+
static int
-necp_client_copy_internal(struct necp_client *client, bool client_is_observed, struct necp_client_action_args *uap, int *retval)
+necp_client_copy_internal(struct necp_client *client, uuid_t client_id, bool client_is_observed, struct necp_client_action_args *uap, int *retval)
{
+ NECP_CLIENT_ASSERT_LOCKED(client);
int error = 0;
// Copy results out
if (uap->action == NECP_CLIENT_ACTION_COPY_PARAMETERS) {
if (uap->buffer_size < client->parameters_length) {
- error = EINVAL;
- goto done;
+ return (EINVAL);
}
error = copyout(client->parameters, uap->buffer, client->parameters_length);
if (error) {
NECPLOG(LOG_ERR, "necp_client_copy parameters copyout error (%d)", error);
- goto done;
+ return (error);
}
*retval = client->parameters_length;
- } else if (uap->action == NECP_CLIENT_ACTION_COPY_RESULT) {
- if (uap->buffer_size < (client->result_length + client->assigned_results_length)) {
- error = EINVAL;
- goto done;
+ } else if (uap->action == NECP_CLIENT_ACTION_COPY_UPDATED_RESULT &&
+ client->result_read && !necp_client_has_unread_flows(client)) {
+ // Copy updates only, but nothing to read
+ // Just return 0 for bytes read
+ *retval = 0;
+ } else if (uap->action == NECP_CLIENT_ACTION_COPY_RESULT ||
+ uap->action == NECP_CLIENT_ACTION_COPY_UPDATED_RESULT) {
+ size_t assigned_results_size = 0;
+
+ bool some_flow_is_defunct = false;
+ struct necp_client_flow_registration *single_flow_registration = NULL;
+ if (necp_client_id_is_flow(client_id)) {
+ single_flow_registration = necp_client_find_flow(client, client_id);
+ if (single_flow_registration != NULL) {
+ assigned_results_size += necp_client_calculate_flow_tlv_size(single_flow_registration);
+ }
+ } else {
+ // This request is for the client, so copy everything
+ struct necp_client_flow_registration *flow_registration = NULL;
+ RB_FOREACH(flow_registration, _necp_client_flow_tree, &client->flow_registrations) {
+ if (flow_registration->defunct) {
+ some_flow_is_defunct = true;
+ }
+ assigned_results_size += necp_client_calculate_flow_tlv_size(flow_registration);
+ }
+ }
+ if (uap->buffer_size < (client->result_length + assigned_results_size)) {
+ return (EINVAL);
+ }
+
+ u_int32_t original_flags = 0;
+ bool flags_updated = false;
+ if (some_flow_is_defunct && client->legacy_client_is_flow) {
+ // If our client expects the defunct flag in the client, add it now
+ u_int32_t client_flags = 0;
+ u_int32_t value_size = 0;
+ u_int8_t *flags_pointer = necp_buffer_get_tlv_value(client->result, 0, &value_size);
+ if (flags_pointer != NULL && value_size == sizeof(client_flags)) {
+ memcpy(&client_flags, flags_pointer, value_size);
+ original_flags = client_flags;
+ client_flags |= NECP_CLIENT_RESULT_FLAG_DEFUNCT;
+ (void)necp_buffer_write_tlv_if_different(client->result, NECP_CLIENT_RESULT_FLAGS,
+ sizeof(client_flags), &client_flags, &flags_updated,
+ client->result, sizeof(client->result));
+ }
}
+
error = copyout(client->result, uap->buffer, client->result_length);
+
+ if (flags_updated) {
+ // Revert stored flags
+ (void)necp_buffer_write_tlv_if_different(client->result, NECP_CLIENT_RESULT_FLAGS,
+ sizeof(original_flags), &original_flags, &flags_updated,
+ client->result, sizeof(client->result));
+ }
+
if (error) {
NECPLOG(LOG_ERR, "necp_client_copy result copyout error (%d)", error);
- goto done;
+ return (error);
}
- if (client->assigned_results_length && client->assigned_results) {
- error = copyout(client->assigned_results, uap->buffer + client->result_length, client->assigned_results_length);
- if (error) {
- NECPLOG(LOG_ERR, "necp_client_copy assigned results copyout error (%d)", error);
- goto done;
+
+ size_t assigned_results_cursor = 0;
+ if (necp_client_id_is_flow(client_id)) {
+ if (single_flow_registration != NULL) {
+ error = necp_client_fillout_flow_tlvs(client, client_is_observed, single_flow_registration, uap, &assigned_results_cursor);
+ if (error != 0) {
+ return (error);
+ }
}
- *retval = client->result_length + client->assigned_results_length;
} else {
- *retval = client->result_length;
+ // This request is for the client, so copy everything
+ struct necp_client_flow_registration *flow_registration = NULL;
+ RB_FOREACH(flow_registration, _necp_client_flow_tree, &client->flow_registrations) {
+ error = necp_client_fillout_flow_tlvs(client, client_is_observed, flow_registration, uap, &assigned_results_cursor);
+ if (error != 0) {
+ return (error);
+ }
+ }
}
+ *retval = client->result_length + assigned_results_cursor;
+
if (!client_is_observed) {
client->result_read = TRUE;
- client->assigned_result_read = TRUE;
}
}
-done:
- return (error);
+ return (0);
}
static int
necp_client_copy(struct necp_fd_data *fd_data, struct necp_client_action_args *uap, int *retval)
{
int error = 0;
- struct necp_client *find_client = NULL;
struct necp_client *client = NULL;
uuid_t client_id;
uuid_clear(client_id);
*retval = 0;
if (uap->buffer_size == 0 || uap->buffer == 0) {
- error = EINVAL;
- goto done;
+ return (EINVAL);
}
if (uap->action != NECP_CLIENT_ACTION_COPY_PARAMETERS &&
- uap->action != NECP_CLIENT_ACTION_COPY_RESULT) {
- error = EINVAL;
- goto done;
+ uap->action != NECP_CLIENT_ACTION_COPY_RESULT &&
+ uap->action != NECP_CLIENT_ACTION_COPY_UPDATED_RESULT) {
+ return (EINVAL);
}
if (uap->client_id) {
if (uap->client_id_len != sizeof(uuid_t)) {
NECPLOG(LOG_ERR, "Incorrect length (got %d, expected %d)", uap->client_id_len, sizeof(uuid_t));
- error = ERANGE;
- goto done;
+ return (ERANGE);
}
error = copyin(uap->client_id, client_id, sizeof(uuid_t));
if (error) {
NECPLOG(LOG_ERR, "necp_client_copy client_id copyin error (%d)", error);
- goto done;
+ return (error);
}
}
- lck_mtx_lock(&fd_data->fd_lock);
- LIST_FOREACH(find_client, &fd_data->clients, chain) {
- if (uap->action == NECP_CLIENT_ACTION_COPY_RESULT &&
- uuid_is_null(client_id)) {
- if (!find_client->result_read || !find_client->assigned_result_read) {
- client = find_client;
- break;
+ const bool is_wildcard = (bool)uuid_is_null(client_id);
+
+ NECP_FD_LOCK(fd_data);
+
+ if (is_wildcard) {
+ if (uap->action == NECP_CLIENT_ACTION_COPY_RESULT || uap->action == NECP_CLIENT_ACTION_COPY_UPDATED_RESULT) {
+ struct necp_client *find_client = NULL;
+ RB_FOREACH(find_client, _necp_client_tree, &fd_data->clients) {
+ NECP_CLIENT_LOCK(find_client);
+ if (!find_client->result_read || necp_client_has_unread_flows(find_client)) {
+ client = find_client;
+ // Leave the client locked, and break
+ break;
+ }
+ NECP_CLIENT_UNLOCK(find_client);
}
- } else if (uuid_compare(find_client->client_id, client_id) == 0) {
- client = find_client;
- break;
}
+ } else {
+ client = necp_client_fd_find_client_and_lock(fd_data, client_id);
}
if (client != NULL) {
- error = necp_client_copy_internal(client, FALSE, uap, retval);
+ // If client is set, it is locked
+ error = necp_client_copy_internal(client, client_id, FALSE, uap, retval);
+ NECP_CLIENT_UNLOCK(client);
}
- // Unlock our own client before moving on or returning
- lck_mtx_unlock(&fd_data->fd_lock);
+ // Unlock our own fd before moving on or returning
+ NECP_FD_UNLOCK(fd_data);
if (client == NULL) {
if (fd_data->flags & NECP_OPEN_FLAG_OBSERVER) {
// Observers are allowed to lookup clients on other fds
- // Lock list
- lck_rw_lock_shared(&necp_fd_lock);
- struct necp_fd_data *client_fd = NULL;
- LIST_FOREACH(client_fd, &necp_fd_list, chain) {
- // Lock client
- lck_mtx_lock(&client_fd->fd_lock);
- find_client = NULL;
- LIST_FOREACH(find_client, &client_fd->clients, chain) {
- if (uuid_compare(find_client->client_id, client_id) == 0) {
- client = find_client;
- break;
- }
- }
-
- if (client != NULL) {
- // Matched, copy out data
- error = necp_client_copy_internal(client, TRUE, uap, retval);
- }
+ // Lock tree
+ NECP_CLIENT_TREE_LOCK_SHARED();
- // Unlock client
- lck_mtx_unlock(&client_fd->fd_lock);
+ bool found_client = FALSE;
- if (client != NULL) {
- break;
- }
+ client = necp_find_client_and_lock(client_id);
+ if (client != NULL) {
+ // Matched, copy out data
+ found_client = TRUE;
+ error = necp_client_copy_internal(client, client_id, TRUE, uap, retval);
+ NECP_CLIENT_UNLOCK(client);
}
- // Unlock list
- lck_rw_done(&necp_fd_lock);
+ // Unlock tree
+ NECP_CLIENT_TREE_UNLOCK();
// No client found, fail
- if (client == NULL) {
- error = ENOENT;
- goto done;
+ if (!found_client) {
+ return (ENOENT);
}
} else {
// No client found, and not allowed to search other fds, fail
- error = ENOENT;
- goto done;
+ return (ENOENT);
}
}
-done:
+ return (error);
+}
+
+static int
+necp_client_copy_client_update(struct necp_fd_data *fd_data, struct necp_client_action_args *uap, int *retval)
+{
+ int error = 0;
+
+ *retval = 0;
+
+ if (!(fd_data->flags & NECP_OPEN_FLAG_PUSH_OBSERVER)) {
+ NECPLOG0(LOG_ERR, "NECP fd is not observer, cannot copy client update");
+ return (EINVAL);
+ }
+
+ if (uap->client_id_len != sizeof(uuid_t) || uap->client_id == 0) {
+ NECPLOG0(LOG_ERR, "Client id invalid, cannot copy client update");
+ return (EINVAL);
+ }
+
+ if (uap->buffer_size == 0 || uap->buffer == 0) {
+ NECPLOG0(LOG_ERR, "Buffer invalid, cannot copy client update");
+ return (EINVAL);
+ }
+
+ NECP_FD_LOCK(fd_data);
+ struct necp_client_update *client_update = TAILQ_FIRST(&fd_data->update_list);
+ if (client_update != NULL) {
+ TAILQ_REMOVE(&fd_data->update_list, client_update, chain);
+ VERIFY(fd_data->update_count > 0);
+ fd_data->update_count--;
+ }
+ NECP_FD_UNLOCK(fd_data);
+
+ if (client_update != NULL) {
+ error = copyout(client_update->client_id, uap->client_id, sizeof(uuid_t));
+ if (error) {
+ NECPLOG(LOG_ERR, "Copy client update copyout client id error (%d)", error);
+ } else {
+ if (uap->buffer_size < client_update->update_length) {
+ NECPLOG(LOG_ERR, "Buffer size cannot hold update (%zu < %zu)", uap->buffer_size, client_update->update_length);
+ error = EINVAL;
+ } else {
+ error = copyout(&client_update->update, uap->buffer, client_update->update_length);
+ if (error) {
+ NECPLOG(LOG_ERR, "Copy client update copyout error (%d)", error);
+ } else {
+ *retval = client_update->update_length;
+ }
+ }
+ }
+
+ FREE(client_update, M_NECP);
+ client_update = NULL;
+ } else {
+ error = ENOENT;
+ }
+
+ return (error);
+}
+
+static int
+necp_client_copy_parameters_locked(struct necp_client *client,
+ struct necp_client_nexus_parameters *parameters)
+{
+ VERIFY(parameters != NULL);
+
+ struct necp_client_parsed_parameters parsed_parameters = {};
+ int error = necp_client_parse_parameters(client->parameters, (u_int32_t)client->parameters_length, &parsed_parameters);
+
+ parameters->pid = client->proc_pid;
+ if (parsed_parameters.valid_fields & NECP_PARSED_PARAMETERS_FIELD_EFFECTIVE_PID) {
+ parameters->epid = parsed_parameters.effective_pid;
+ } else {
+ parameters->epid = parameters->pid;
+ }
+ memcpy(¶meters->local_addr, &parsed_parameters.local_addr, sizeof(parameters->local_addr));
+ memcpy(¶meters->remote_addr, &parsed_parameters.remote_addr, sizeof(parameters->remote_addr));
+ parameters->ip_protocol = parsed_parameters.ip_protocol;
+ parameters->traffic_class = parsed_parameters.traffic_class;
+ uuid_copy(parameters->euuid, parsed_parameters.effective_uuid);
+ parameters->is_listener = (parsed_parameters.flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER) ? 1 : 0;
+ parameters->policy_id = client->policy_id;
+
+ // parse client result flag
+ u_int32_t client_result_flags = 0;
+ u_int32_t value_size = 0;
+ u_int8_t *flags_pointer = NULL;
+ flags_pointer = necp_buffer_get_tlv_value(client->result, 0, &value_size);
+ if (flags_pointer && value_size == sizeof(client_result_flags)) {
+ memcpy(&client_result_flags, flags_pointer, value_size);
+ }
+ parameters->allow_qos_marking = (client_result_flags & NECP_CLIENT_RESULT_FLAG_ALLOW_QOS_MARKING) ? 1 : 0;
+
return (error);
}
uuid_t *list = NULL;
u_int32_t requested_client_count = 0;
u_int32_t client_count = 0;
+ size_t copy_buffer_size = 0;
if (uap->buffer_size < sizeof(requested_client_count) || uap->buffer == 0) {
error = EINVAL;
goto done;
}
- if (uap->buffer_size != (sizeof(requested_client_count) + requested_client_count * sizeof(uuid_t))) {
+ if (os_mul_overflow(sizeof(uuid_t), requested_client_count, ©_buffer_size)) {
+ error = ERANGE;
+ goto done;
+ }
+
+ if (uap->buffer_size - sizeof(requested_client_count) != copy_buffer_size) {
+ error = EINVAL;
+ goto done;
+ }
+
+ if (copy_buffer_size > NECP_MAX_CLIENT_LIST_SIZE) {
error = EINVAL;
goto done;
}
if (requested_client_count > 0) {
- if ((list = _MALLOC(requested_client_count * sizeof(uuid_t), M_NECP, M_WAITOK | M_ZERO)) == NULL) {
+ if ((list = _MALLOC(copy_buffer_size, M_NECP, M_WAITOK | M_ZERO)) == NULL) {
error = ENOMEM;
goto done;
}
}
-
- // Lock list
- lck_rw_lock_shared(&necp_fd_lock);
- struct necp_fd_data *client_fd = NULL;
- LIST_FOREACH(client_fd, &necp_fd_list, chain) {
- // Lock client
- lck_mtx_lock(&client_fd->fd_lock);
- find_client = NULL;
- LIST_FOREACH(find_client, &client_fd->clients, chain) {
- if (!uuid_is_null(find_client->client_id)) {
- if (client_count < requested_client_count) {
- uuid_copy(list[client_count], find_client->client_id);
- }
- client_count++;
+
+ // Lock tree
+ NECP_CLIENT_TREE_LOCK_SHARED();
+
+ find_client = NULL;
+ RB_FOREACH(find_client, _necp_client_global_tree, &necp_client_global_tree) {
+ NECP_CLIENT_LOCK(find_client);
+ if (!uuid_is_null(find_client->client_id)) {
+ if (client_count < requested_client_count) {
+ uuid_copy(list[client_count], find_client->client_id);
}
+ client_count++;
}
- lck_mtx_unlock(&client_fd->fd_lock);
+ NECP_CLIENT_UNLOCK(find_client);
}
- // Unlock list
- lck_rw_done(&necp_fd_lock);
+ // Unlock tree
+ NECP_CLIENT_TREE_UNLOCK();
error = copyout(&client_count, uap->buffer, sizeof(client_count));
if (error) {
if (requested_client_count > 0 &&
client_count > 0 &&
list != NULL) {
- error = copyout(list, uap->buffer + sizeof(client_count), requested_client_count * sizeof(uuid_t));
+ error = copyout(list, uap->buffer + sizeof(client_count), copy_buffer_size);
if (error) {
NECPLOG(LOG_ERR, "necp_client_list client count copyout error (%d)", error);
goto done;
FREE(list, M_NECP);
}
*retval = error;
-
- return (error);
-}
-
-static int
-necp_client_request_nexus(struct necp_fd_data *fd_data, struct necp_client_action_args *uap, int *retval)
-{
- int error = 0;
- struct necp_client *client = NULL;
- uuid_t client_id;
- bool requested_nexus = FALSE;
-
- if (uap->client_id == 0 || uap->client_id_len != sizeof(uuid_t)) {
- error = EINVAL;
- goto done;
- }
-
- error = copyin(uap->client_id, client_id, sizeof(uuid_t));
- if (error) {
- NECPLOG(LOG_ERR, "necp_client_request_nexus copyin client_id error (%d)", error);
- goto done;
- }
-
- lck_mtx_lock(&fd_data->fd_lock);
- LIST_FOREACH(client, &fd_data->clients, chain) {
- if (uuid_compare(client->client_id, client_id) == 0) {
- // Request from nexus agent
- if (!uuid_is_null(client->nexus_agent)) {
- error = netagent_client_message(client->nexus_agent, client->client_id,
- NETAGENT_MESSAGE_TYPE_REQUEST_NEXUS);
- if (error == 0) {
- requested_nexus = TRUE;
- }
- }
- break;
- }
- }
- lck_mtx_unlock(&fd_data->fd_lock);
-
- if (!requested_nexus &&
- error == 0) {
- error = ENOENT;
- }
-done:
- *retval = error;
return (error);
}
+
static void
necp_client_add_assertion(struct necp_client *client, uuid_t netagent_uuid)
{
necp_client_agent_action(struct necp_fd_data *fd_data, struct necp_client_action_args *uap, int *retval)
{
int error = 0;
- struct necp_client *matched_client = NULL;
struct necp_client *client = NULL;
uuid_t client_id;
bool acted_on_agent = FALSE;
if (uap->client_id == 0 || uap->client_id_len != sizeof(uuid_t) ||
uap->buffer_size == 0 || uap->buffer == 0) {
+ NECPLOG0(LOG_ERR, "necp_client_agent_action invalid parameters");
error = EINVAL;
goto done;
}
goto done;
}
+ if (uap->buffer_size > NECP_MAX_AGENT_ACTION_SIZE) {
+ NECPLOG(LOG_ERR, "necp_client_agent_action invalid buffer size (>%u)", NECP_MAX_AGENT_ACTION_SIZE);
+ error = EINVAL;
+ goto done;
+ }
+
if ((parameters = _MALLOC(uap->buffer_size, M_NECP, M_WAITOK | M_ZERO)) == NULL) {
+ NECPLOG0(LOG_ERR, "necp_client_agent_action malloc failed");
error = ENOMEM;
goto done;
}
goto done;
}
- lck_mtx_lock(&fd_data->fd_lock);
- LIST_FOREACH(client, &fd_data->clients, chain) {
- if (uuid_compare(client->client_id, client_id) == 0) {
- matched_client = client;
- break;
- }
- }
- if (matched_client) {
+ NECP_FD_LOCK(fd_data);
+ client = necp_client_fd_find_client_and_lock(fd_data, client_id);
+ if (client != NULL) {
size_t offset = 0;
- while ((offset + sizeof(u_int8_t) + sizeof(u_int32_t)) <= parameters_size) {
+ while ((offset + sizeof(struct necp_tlv_header)) <= parameters_size) {
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(struct necp_tlv_header)))) {
+ // 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 (length >= sizeof(uuid_t) &&
value != NULL &&
}
}
- error = netagent_client_message(agent_uuid, client_id,
- netagent_message_type);
+ struct necp_client_nexus_parameters parsed_parameters = {};
+ necp_client_copy_parameters_locked(client, &parsed_parameters);
+
+ error = netagent_client_message_with_params(agent_uuid,
+ client_id,
+ fd_data->proc_pid,
+ client->agent_handle,
+ netagent_message_type,
+ &parsed_parameters,
+ NULL, NULL);
if (error == 0) {
acted_on_agent = TRUE;
} else {
}
}
- offset += sizeof(u_int8_t) + sizeof(u_int32_t) + length;
+ offset += sizeof(struct necp_tlv_header) + length;
}
+
+ NECP_CLIENT_UNLOCK(client);
}
- lck_mtx_unlock(&fd_data->fd_lock);
+ NECP_FD_UNLOCK(fd_data);
if (!acted_on_agent &&
error == 0) {
FREE(parameters, M_NECP);
parameters = NULL;
}
-
+
return (error);
}
error = netagent_copyout(agent_uuid, uap->buffer, uap->buffer_size);
if (error) {
- NECPLOG(LOG_ERR, "necp_client_copy_agent netagent_copyout error (%d)", error);
+ // netagent_copyout already logs appropriate errors
+ goto done;
+ }
+done:
+ *retval = error;
+
+ return (error);
+}
+
+static int
+necp_client_agent_use(struct necp_fd_data *fd_data, struct necp_client_action_args *uap, int *retval)
+{
+ int error = 0;
+ struct necp_client *client = NULL;
+ uuid_t client_id;
+ struct necp_agent_use_parameters parameters;
+
+ if (uap->client_id == 0 || uap->client_id_len != sizeof(uuid_t) ||
+ uap->buffer_size != sizeof(parameters) || uap->buffer == 0) {
+ error = EINVAL;
+ goto done;
+ }
+
+ error = copyin(uap->client_id, client_id, sizeof(uuid_t));
+ if (error) {
+ NECPLOG(LOG_ERR, "Copyin client_id error (%d)", error);
+ goto done;
+ }
+
+ error = copyin(uap->buffer, ¶meters, uap->buffer_size);
+ if (error) {
+ NECPLOG(LOG_ERR, "Parameters copyin error (%d)", error);
goto done;
}
+
+ NECP_FD_LOCK(fd_data);
+ client = necp_client_fd_find_client_and_lock(fd_data, client_id);
+ if (client != NULL) {
+ error = netagent_use(parameters.agent_uuid, ¶meters.out_use_count);
+ NECP_CLIENT_UNLOCK(client);
+ } else {
+ error = ENOENT;
+ }
+
+ NECP_FD_UNLOCK(fd_data);
+
+ if (error == 0) {
+ error = copyout(¶meters, uap->buffer, uap->buffer_size);
+ if (error) {
+ NECPLOG(LOG_ERR, "Parameters copyout error (%d)", error);
+ goto done;
+ }
+ }
+
done:
*retval = error;
-
+
return (error);
}
ifnet_head_lock_shared();
ifnet_t interface = NULL;
- if (interface_index != IFSCOPE_NONE && (int)interface_index <= if_index) {
+ if (interface_index != IFSCOPE_NONE && interface_index <= (u_int32_t)if_index) {
interface = ifindex2ifnet[interface_index];
}
if (IFNET_IS_EXPENSIVE(interface)) {
interface_details.flags |= NECP_INTERFACE_FLAG_EXPENSIVE;
}
+ if ((interface->if_eflags & IFEF_TXSTART) == IFEF_TXSTART) {
+ interface_details.flags |= NECP_INTERFACE_FLAG_TXSTART;
+ }
+ if ((interface->if_eflags & IFEF_NOACKPRI) == IFEF_NOACKPRI) {
+ interface_details.flags |= NECP_INTERFACE_FLAG_NOACKPRI;
+ }
+ if ((interface->if_eflags & IFEF_3CA) == IFEF_3CA) {
+ interface_details.flags |= NECP_INTERFACE_FLAG_3CARRIERAGG;
+ }
+ if (IFNET_IS_LOW_POWER(interface)) {
+ interface_details.flags |= NECP_INTERFACE_FLAG_IS_LOW_POWER;
+ }
interface_details.mtu = interface->if_mtu;
- u_int8_t ipv4_signature_len = sizeof(interface_details.ipv4_signature);
+ u_int8_t ipv4_signature_len = sizeof(interface_details.ipv4_signature.signature);
u_int16_t ipv4_signature_flags;
- ifnet_get_netsignature(interface, AF_INET, &ipv4_signature_len, &ipv4_signature_flags,
- (u_int8_t *)&interface_details.ipv4_signature);
+ if (ifnet_get_netsignature(interface, AF_INET, &ipv4_signature_len, &ipv4_signature_flags,
+ (u_int8_t *)&interface_details.ipv4_signature) != 0) {
+ ipv4_signature_len = 0;
+ }
+ interface_details.ipv4_signature.signature_len = ipv4_signature_len;
- u_int8_t ipv6_signature_len = sizeof(interface_details.ipv6_signature);
+ u_int8_t ipv6_signature_len = sizeof(interface_details.ipv6_signature.signature);
u_int16_t ipv6_signature_flags;
- ifnet_get_netsignature(interface, AF_INET6, &ipv6_signature_len, &ipv6_signature_flags,
- (u_int8_t *)&interface_details.ipv6_signature);
+ if (ifnet_get_netsignature(interface, AF_INET6, &ipv6_signature_len, &ipv6_signature_flags,
+ (u_int8_t *)&interface_details.ipv6_signature) != 0) {
+ ipv6_signature_len = 0;
+ }
+ interface_details.ipv6_signature.signature_len = ipv6_signature_len;
}
ifnet_head_done();
return (error);
}
+
static int
-necp_client_stats_action(struct necp_client *client, user_addr_t buffer, user_size_t buffer_size)
+necp_client_copy_route_statistics(__unused struct necp_fd_data *fd_data, struct necp_client_action_args *uap, int *retval)
{
int error = 0;
- struct necp_stats_hdr *stats_hdr = NULL;
-
- if (client->stats_area) {
- // Close old stats if required.
- if ((client->stats_uaddr != buffer) || (client->stats_ulen != buffer_size)) {
- necp_destroy_client_stats(client);
- }
- }
-
- if ((buffer == 0) || (buffer_size == 0)) {
- goto done;
- }
-
- if (client->stats_area) {
- // An update
- error = copyin(client->stats_uaddr, client->stats_area, client->stats_ulen);
- if (error) {
- NECPLOG(LOG_ERR, "necp_client_stats_action copyin error on update (%d)", error);
- } else {
- // Future use - check
- stats_hdr = (necp_stats_hdr *)client->stats_area;
- if (stats_hdr->necp_stats_event != 0) {
- ntstat_userland_stats_event(client->stats_handler_context, (userland_stats_event_t)stats_hdr->necp_stats_event);
- }
- }
- goto done;
- }
+ struct necp_client *client = NULL;
+ uuid_t client_id;
- // A create
- if ((buffer_size > sizeof(necp_all_stats)) || (buffer_size < sizeof(necp_stats_hdr))) {
+ if (uap->client_id == 0 || uap->client_id_len != sizeof(uuid_t) ||
+ uap->buffer_size < sizeof(struct necp_stat_counts) || uap->buffer == 0) {
+ NECPLOG0(LOG_ERR, "necp_client_copy_route_statistics bad input");
error = EINVAL;
goto done;
}
- if ((stats_hdr = _MALLOC(buffer_size, M_NECP, M_WAITOK | M_ZERO)) == NULL) {
- error = ENOMEM;
- goto done;
- }
-
- client->stats_handler_context = NULL;
- client->stats_uaddr = buffer;
- client->stats_ulen = buffer_size;
- client->stats_area = stats_hdr;
- error = copyin(client->stats_uaddr, client->stats_area, client->stats_ulen);
+ error = copyin(uap->client_id, client_id, sizeof(uuid_t));
if (error) {
- NECPLOG(LOG_ERR, "necp_client_stats_action copyin error on create (%d)", error);
+ NECPLOG(LOG_ERR, "necp_client_copy_route_statistics copyin client_id error (%d)", error);
goto done;
}
- switch (stats_hdr->necp_stats_type) {
- case NECP_CLIENT_STATISTICS_TYPE_TCP: {
- if (stats_hdr->necp_stats_ver == NECP_CLIENT_STATISTICS_TYPE_TCP_VER_1) {
- client->stats_handler_context = ntstat_userland_stats_open((userland_stats_provider_context *)client,
- NSTAT_PROVIDER_TCP_USERLAND, 0, necp_request_tcp_netstats);
- if (client->stats_handler_context == NULL) {
- error = EIO;
- }
- } else {
- error = ENOTSUP;
- }
- break;
- }
- case NECP_CLIENT_STATISTICS_TYPE_UDP: {
- if (stats_hdr->necp_stats_ver != NECP_CLIENT_STATISTICS_TYPE_UDP_VER_1) {
- client->stats_handler_context = ntstat_userland_stats_open((userland_stats_provider_context *)client,
- NSTAT_PROVIDER_UDP_USERLAND, 0, necp_request_udp_netstats);
- if (client->stats_handler_context == NULL) {
- error = EIO;
- }
- } else {
- error = ENOTSUP;
- }
- break;
+ // Lock
+ NECP_FD_LOCK(fd_data);
+ client = necp_client_fd_find_client_and_lock(fd_data, client_id);
+ if (client != NULL) {
+ NECP_CLIENT_ROUTE_LOCK(client);
+ struct necp_stat_counts route_stats = {};
+ if (client->current_route != NULL && client->current_route->rt_stats != NULL) {
+ struct nstat_counts *rt_stats = client->current_route->rt_stats;
+ atomic_get_64(route_stats.necp_stat_rxpackets, &rt_stats->nstat_rxpackets);
+ atomic_get_64(route_stats.necp_stat_rxbytes, &rt_stats->nstat_rxbytes);
+ atomic_get_64(route_stats.necp_stat_txpackets, &rt_stats->nstat_txpackets);
+ atomic_get_64(route_stats.necp_stat_txbytes, &rt_stats->nstat_txbytes);
+ route_stats.necp_stat_rxduplicatebytes = rt_stats->nstat_rxduplicatebytes;
+ route_stats.necp_stat_rxoutoforderbytes = rt_stats->nstat_rxoutoforderbytes;
+ route_stats.necp_stat_txretransmit = rt_stats->nstat_txretransmit;
+ route_stats.necp_stat_connectattempts = rt_stats->nstat_connectattempts;
+ route_stats.necp_stat_connectsuccesses = rt_stats->nstat_connectsuccesses;
+ route_stats.necp_stat_min_rtt = rt_stats->nstat_min_rtt;
+ route_stats.necp_stat_avg_rtt = rt_stats->nstat_avg_rtt;
+ route_stats.necp_stat_var_rtt = rt_stats->nstat_var_rtt;
+ route_stats.necp_stat_route_flags = client->current_route->rt_flags;
}
- default: {
- error = ENOTSUP;
- break;
+
+ // Unlock before copying out
+ NECP_CLIENT_ROUTE_UNLOCK(client);
+ NECP_CLIENT_UNLOCK(client);
+ NECP_FD_UNLOCK(fd_data);
+
+ error = copyout(&route_stats, uap->buffer, sizeof(route_stats));
+ if (error) {
+ NECPLOG(LOG_ERR, "necp_client_copy_route_statistics copyout error (%d)", error);
}
- }
-done:
- if ((error) && (stats_hdr != NULL)) {
- FREE(stats_hdr, M_NECP);
- client->stats_area = NULL;
- client->stats_handler_context = NULL;
- client->stats_uaddr = 0;
- client->stats_ulen = 0;
+ } else {
+ // Unlock
+ NECP_FD_UNLOCK(fd_data);
+ error = ENOENT;
}
+
+done:
+ *retval = error;
return (error);
}
static int
-necp_client_set_statistics(__unused struct necp_fd_data *fd_data, struct necp_client_action_args *uap, int *retval)
+necp_client_update_cache(struct necp_fd_data *fd_data, struct necp_client_action_args *uap, int *retval)
{
int error = 0;
- struct necp_client *find_client = NULL;
struct necp_client *client = NULL;
uuid_t client_id;
error = copyin(uap->client_id, client_id, sizeof(uuid_t));
if (error) {
- NECPLOG(LOG_ERR, "necp_client_set_statistics copyin client_id error (%d)", error);
+ NECPLOG(LOG_ERR, "necp_client_update_cache copyin client_id error (%d)", error);
goto done;
}
- lck_mtx_lock(&fd_data->fd_lock);
- LIST_FOREACH(find_client, &fd_data->clients, chain) {
- if (uuid_compare(find_client->client_id, client_id) == 0) {
- client = find_client;
- break;
- }
+ NECP_FD_LOCK(fd_data);
+ client = necp_client_fd_find_client_and_lock(fd_data, client_id);
+ if (client == NULL) {
+ NECP_FD_UNLOCK(fd_data);
+ error = ENOENT;
+ goto done;
}
- if (client) {
- error = necp_client_stats_action(client, uap->buffer, uap->buffer_size);
- } else {
+ struct necp_client_flow_registration *flow_registration = necp_client_find_flow(client, client_id);
+ if (flow_registration == NULL) {
+ NECP_CLIENT_UNLOCK(client);
+ NECP_FD_UNLOCK(fd_data);
error = ENOENT;
+ goto done;
+ }
+
+ NECP_CLIENT_ROUTE_LOCK(client);
+ // This needs to be changed when TFO/ECN is supported by multiple flows
+ struct necp_client_flow *flow = LIST_FIRST(&flow_registration->flow_list);
+ if (flow == NULL ||
+ (flow->remote_addr.sa.sa_family != AF_INET &&
+ flow->remote_addr.sa.sa_family != AF_INET6) ||
+ (flow->local_addr.sa.sa_family != AF_INET &&
+ flow->local_addr.sa.sa_family != AF_INET6)) {
+ error = EINVAL;
+ NECPLOG(LOG_ERR, "necp_client_update_cache no flow error (%d)", error);
+ goto done_unlock;
+ }
+
+ necp_cache_buffer cache_buffer;
+ memset(&cache_buffer, 0, sizeof(cache_buffer));
+
+ if (uap->buffer_size != sizeof(necp_cache_buffer) ||
+ uap->buffer == USER_ADDR_NULL) {
+ error = EINVAL;
+ goto done_unlock;
+ }
+
+ error = copyin(uap->buffer, &cache_buffer, sizeof(cache_buffer));
+ if (error) {
+ NECPLOG(LOG_ERR, "necp_client_update_cache copyin cache buffer error (%d)", error);
+ goto done_unlock;
+ }
+
+ if (cache_buffer.necp_cache_buf_type == NECP_CLIENT_CACHE_TYPE_ECN &&
+ cache_buffer.necp_cache_buf_ver == NECP_CLIENT_CACHE_TYPE_ECN_VER_1) {
+ if (cache_buffer.necp_cache_buf_size != sizeof(necp_tcp_ecn_cache) ||
+ cache_buffer.necp_cache_buf_addr == USER_ADDR_NULL) {
+ error = EINVAL;
+ goto done_unlock;
+ }
+
+ necp_tcp_ecn_cache ecn_cache_buffer;
+ memset(&ecn_cache_buffer, 0, sizeof(ecn_cache_buffer));
+
+ error = copyin(cache_buffer.necp_cache_buf_addr, &ecn_cache_buffer, sizeof(necp_tcp_ecn_cache));
+ if (error) {
+ NECPLOG(LOG_ERR, "necp_client_update_cache copyin ecn cache buffer error (%d)", error);
+ goto done_unlock;
+ }
+
+ if (client->current_route != NULL && client->current_route->rt_ifp != NULL) {
+ if (!client->platform_binary) {
+ ecn_cache_buffer.necp_tcp_ecn_heuristics_success = 0;
+ }
+ tcp_heuristics_ecn_update(&ecn_cache_buffer, client->current_route->rt_ifp,
+ (union sockaddr_in_4_6 *)&flow->local_addr);
+ }
+ } else if (cache_buffer.necp_cache_buf_type == NECP_CLIENT_CACHE_TYPE_TFO &&
+ cache_buffer.necp_cache_buf_ver == NECP_CLIENT_CACHE_TYPE_TFO_VER_1) {
+ if (cache_buffer.necp_cache_buf_size != sizeof(necp_tcp_tfo_cache) ||
+ cache_buffer.necp_cache_buf_addr == USER_ADDR_NULL) {
+ error = EINVAL;
+ goto done_unlock;
+ }
+
+ necp_tcp_tfo_cache tfo_cache_buffer;
+ memset(&tfo_cache_buffer, 0, sizeof(tfo_cache_buffer));
+
+ error = copyin(cache_buffer.necp_cache_buf_addr, &tfo_cache_buffer, sizeof(necp_tcp_tfo_cache));
+ if (error) {
+ NECPLOG(LOG_ERR, "necp_client_update_cache copyin tfo cache buffer error (%d)", error);
+ goto done_unlock;
+ }
+
+ if (client->current_route != NULL && client->current_route->rt_ifp != NULL) {
+ if (!client->platform_binary) {
+ tfo_cache_buffer.necp_tcp_tfo_heuristics_success = 0;
+ }
+ tcp_heuristics_tfo_update(&tfo_cache_buffer, client->current_route->rt_ifp,
+ (union sockaddr_in_4_6 *)&flow->local_addr,
+ (union sockaddr_in_4_6 *)&flow->remote_addr);
+ }
+ } else {
+ error = EINVAL;
}
- lck_mtx_unlock(&fd_data->fd_lock);
+done_unlock:
+ NECP_CLIENT_ROUTE_UNLOCK(client);
+ NECP_CLIENT_UNLOCK(client);
+ NECP_FD_UNLOCK(fd_data);
done:
*retval = error;
return (error);
u_int32_t action = uap->action;
switch (action) {
case NECP_CLIENT_ACTION_ADD: {
- return_value = necp_client_add(fd_data, uap, retval);
+ return_value = necp_client_add(p, fd_data, uap, retval);
break;
}
case NECP_CLIENT_ACTION_REMOVE: {
break;
}
case NECP_CLIENT_ACTION_COPY_PARAMETERS:
- case NECP_CLIENT_ACTION_COPY_RESULT: {
+ case NECP_CLIENT_ACTION_COPY_RESULT:
+ case NECP_CLIENT_ACTION_COPY_UPDATED_RESULT: {
return_value = necp_client_copy(fd_data, uap, retval);
break;
}
return_value = necp_client_list(fd_data, uap, retval);
break;
}
- case NECP_CLIENT_ACTION_REQUEST_NEXUS_INSTANCE: {
- return_value = necp_client_request_nexus(fd_data, uap, retval);
- break;
- }
case NECP_CLIENT_ACTION_AGENT: {
return_value = necp_client_agent_action(fd_data, uap, retval);
break;
return_value = necp_client_copy_agent(fd_data, uap, retval);
break;
}
+ case NECP_CLIENT_ACTION_AGENT_USE: {
+ return_value = necp_client_agent_use(fd_data, uap, retval);
+ break;
+ }
case NECP_CLIENT_ACTION_COPY_INTERFACE: {
return_value = necp_client_copy_interface(fd_data, uap, retval);
break;
}
- case NECP_CLIENT_ACTION_SET_STATISTICS: {
- return_value = necp_client_set_statistics(fd_data, uap, retval);
+ case NECP_CLIENT_ACTION_COPY_ROUTE_STATISTICS: {
+ return_value = necp_client_copy_route_statistics(fd_data, uap, retval);
+ break;
+ }
+ case NECP_CLIENT_ACTION_UPDATE_CACHE: {
+ return_value = necp_client_update_cache(fd_data, uap, retval);
+ break;
+ }
+ case NECP_CLIENT_ACTION_COPY_CLIENT_UPDATE: {
+ return_value = necp_client_copy_client_update(fd_data, uap, retval);
break;
}
default: {
goto done;
}
- error = necp_application_find_policy_match_internal(p, parameters, uap->parameters_size, &returned_result, NULL, 0);
+ error = necp_application_find_policy_match_internal(p, parameters, uap->parameters_size,
+ &returned_result, NULL, 0, NULL, NULL, NULL, false);
if (error) {
goto done;
}
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)) {
+ valsize > ((sizeof(struct necp_tlv_header) + NECP_MAX_SOCKET_ATTRIBUTE_STRING_LENGTH) * 2)) {
goto done;
}
u_int8_t *buffer = NULL;
u_int8_t *cursor = NULL;
size_t valsize = 0;
- struct inpcb *inp = sotoinpcb(so);
+ 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);
if (inp->inp_necp_attributes.inp_domain != NULL) {
- valsize += sizeof(u_int8_t) + sizeof(u_int32_t) + strlen(inp->inp_necp_attributes.inp_domain);
+ valsize += sizeof(struct necp_tlv_header) + 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);
+ valsize += sizeof(struct necp_tlv_header) + strlen(inp->inp_necp_attributes.inp_account);
}
if (valsize == 0) {
goto done;
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);
+ cursor = necp_buffer_write_tlv(cursor, NECP_TLV_ATTRIBUTE_DOMAIN, strlen(inp->inp_necp_attributes.inp_domain), inp->inp_necp_attributes.inp_domain,
+ buffer, valsize);
}
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);
+ cursor = necp_buffer_write_tlv(cursor, NECP_TLV_ATTRIBUTE_ACCOUNT, strlen(inp->inp_necp_attributes.inp_account), inp->inp_necp_attributes.inp_account,
+ buffer, valsize);
}
error = sooptcopyout(sopt, buffer, valsize);
if (buffer != NULL) {
FREE(buffer, M_NECP);
}
-
+
return (error);
}
+void *
+necp_create_nexus_assign_message(uuid_t nexus_instance, u_int32_t nexus_port, void *key, uint32_t key_length,
+ struct necp_client_endpoint *local_endpoint, struct necp_client_endpoint *remote_endpoint,
+ u_int32_t flow_adv_index, void *flow_stats, size_t *message_length)
+{
+ u_int8_t *buffer = NULL;
+ u_int8_t *cursor = NULL;
+ size_t valsize = 0;
+ bool has_nexus_assignment = FALSE;
+
+
+ if (!uuid_is_null(nexus_instance)) {
+ has_nexus_assignment = TRUE;
+ valsize += sizeof(struct necp_tlv_header) + sizeof(uuid_t);
+ valsize += sizeof(struct necp_tlv_header) + sizeof(u_int32_t);
+ }
+ if (flow_adv_index != NECP_FLOWADV_IDX_INVALID) {
+ valsize += sizeof(struct necp_tlv_header) + sizeof(u_int32_t);
+ }
+ if (key != NULL && key_length > 0) {
+ valsize += sizeof(struct necp_tlv_header) + key_length;
+ }
+ if (local_endpoint != NULL) {
+ valsize += sizeof(struct necp_tlv_header) + sizeof(struct necp_client_endpoint);
+ }
+ if (remote_endpoint != NULL) {
+ valsize += sizeof(struct necp_tlv_header) + sizeof(struct necp_client_endpoint);
+ }
+ if (flow_stats != NULL) {
+ valsize += sizeof(struct necp_tlv_header) + sizeof(void *);
+ }
+ if (valsize == 0) {
+ return (NULL);
+ }
+
+ MALLOC(buffer, u_int8_t *, valsize, M_NETAGENT, M_WAITOK | M_ZERO); // Use M_NETAGENT area, since it is expected upon free
+ if (buffer == NULL) {
+ return (NULL);
+ }
+
+ cursor = buffer;
+ if (has_nexus_assignment) {
+ cursor = necp_buffer_write_tlv(cursor, NECP_CLIENT_RESULT_NEXUS_INSTANCE, sizeof(uuid_t), nexus_instance, buffer, valsize);
+ cursor = necp_buffer_write_tlv(cursor, NECP_CLIENT_RESULT_NEXUS_PORT, sizeof(u_int32_t), &nexus_port, buffer, valsize);
+ }
+ if (flow_adv_index != NECP_FLOWADV_IDX_INVALID) {
+ cursor = necp_buffer_write_tlv(cursor, NECP_CLIENT_RESULT_NEXUS_PORT_FLOW_INDEX, sizeof(u_int32_t), &flow_adv_index, buffer, valsize);
+ }
+ if (key != NULL && key_length > 0) {
+ cursor = necp_buffer_write_tlv(cursor, NECP_CLIENT_PARAMETER_NEXUS_KEY, key_length, key, buffer, valsize);
+ }
+ if (local_endpoint != NULL) {
+ cursor = necp_buffer_write_tlv(cursor, NECP_CLIENT_RESULT_LOCAL_ENDPOINT, sizeof(struct necp_client_endpoint), local_endpoint, buffer, valsize);
+ }
+ if (remote_endpoint != NULL) {
+ cursor = necp_buffer_write_tlv(cursor, NECP_CLIENT_RESULT_REMOTE_ENDPOINT, sizeof(struct necp_client_endpoint), remote_endpoint, buffer, valsize);
+ }
+ if (flow_stats != NULL) {
+ cursor = necp_buffer_write_tlv(cursor, NECP_CLIENT_RESULT_NEXUS_FLOW_STATS, sizeof(void *), &flow_stats, buffer, valsize);
+ }
+
+ *message_length = valsize;
+
+ return (buffer);
+}
+
+void
+necp_inpcb_remove_cb(struct inpcb *inp)
+{
+ if (!uuid_is_null(inp->necp_client_uuid)) {
+ necp_client_unregister_socket_flow(inp->necp_client_uuid, inp);
+ uuid_clear(inp->necp_client_uuid);
+ }
+}
+
void
necp_inpcb_dispose(struct inpcb *inp)
{
+ necp_inpcb_remove_cb(inp); // Clear out socket registrations if not yet done
if (inp->inp_necp_attributes.inp_domain != NULL) {
FREE(inp->inp_necp_attributes.inp_domain, M_NECP);
inp->inp_necp_attributes.inp_domain = NULL;
}
}
+void
+necp_mppcb_dispose(struct mppcb *mpp)
+{
+ if (!uuid_is_null(mpp->necp_client_uuid)) {
+ necp_client_unregister_multipath_cb(mpp->necp_client_uuid, mpp);
+ uuid_clear(mpp->necp_client_uuid);
+ }
+}
+
/// Module init
errno_t
necp_client_init(void)
{
- errno_t result = 0;
-
necp_fd_grp_attr = lck_grp_attr_alloc_init();
if (necp_fd_grp_attr == NULL) {
- NECPLOG0(LOG_ERR, "lck_grp_attr_alloc_init failed");
- result = ENOMEM;
- goto done;
+ panic("lck_grp_attr_alloc_init failed\n");
+ /* NOTREACHED */
}
necp_fd_mtx_grp = lck_grp_alloc_init("necp_fd", necp_fd_grp_attr);
if (necp_fd_mtx_grp == NULL) {
- NECPLOG0(LOG_ERR, "lck_grp_alloc_init failed");
- result = ENOMEM;
- goto done;
+ panic("lck_grp_alloc_init failed\n");
+ /* NOTREACHED */
}
necp_fd_mtx_attr = lck_attr_alloc_init();
if (necp_fd_mtx_attr == NULL) {
- NECPLOG0(LOG_ERR, "lck_attr_alloc_init failed");
- result = ENOMEM;
- goto done;
+ panic("lck_attr_alloc_init failed\n");
+ /* NOTREACHED */
}
- necp_client_tcall = thread_call_allocate(necp_update_all_clients_callout, NULL);
- if (necp_client_tcall == NULL) {
- NECPLOG0(LOG_ERR, "thread_call_allocate failed");
- result = ENOMEM;
- goto done;
+ necp_client_fd_size = sizeof(struct necp_fd_data);
+ necp_client_fd_zone = zinit(necp_client_fd_size,
+ NECP_CLIENT_FD_ZONE_MAX * necp_client_fd_size,
+ 0, NECP_CLIENT_FD_ZONE_NAME);
+ if (necp_client_fd_zone == NULL) {
+ panic("zinit(necp_client_fd) failed\n");
+ /* NOTREACHED */
+ }
+
+ necp_flow_size = sizeof(struct necp_client_flow);
+ necp_flow_cache = mcache_create(NECP_FLOW_ZONE_NAME, necp_flow_size, sizeof (uint64_t), 0, MCR_SLEEP);
+ if (necp_flow_cache == NULL) {
+ panic("mcache_create(necp_flow_cache) failed\n");
+ /* NOTREACHED */
+ }
+
+ necp_flow_registration_size = sizeof(struct necp_client_flow_registration);
+ necp_flow_registration_cache = mcache_create(NECP_FLOW_REGISTRATION_ZONE_NAME, necp_flow_registration_size, sizeof (uint64_t), 0, MCR_SLEEP);
+ if (necp_flow_registration_cache == NULL) {
+ panic("mcache_create(necp_client_flow_registration) failed\n");
+ /* NOTREACHED */
}
+ necp_client_update_tcall = thread_call_allocate_with_options(necp_update_all_clients_callout, NULL,
+ THREAD_CALL_PRIORITY_KERNEL, THREAD_CALL_OPTIONS_ONCE);
+ VERIFY(necp_client_update_tcall != NULL);
+
lck_rw_init(&necp_fd_lock, necp_fd_mtx_grp, necp_fd_mtx_attr);
+ lck_rw_init(&necp_observer_lock, necp_fd_mtx_grp, necp_fd_mtx_attr);
+ lck_rw_init(&necp_client_tree_lock, necp_fd_mtx_grp, necp_fd_mtx_attr);
+ lck_rw_init(&necp_flow_tree_lock, necp_fd_mtx_grp, necp_fd_mtx_attr);
+ lck_rw_init(&necp_collect_stats_list_lock, necp_fd_mtx_grp, necp_fd_mtx_attr);
LIST_INIT(&necp_fd_list);
+ LIST_INIT(&necp_fd_observer_list);
+ LIST_INIT(&necp_collect_stats_flow_list);
-done:
- if (result != 0) {
- if (necp_fd_mtx_attr != NULL) {
- lck_attr_free(necp_fd_mtx_attr);
- necp_fd_mtx_attr = NULL;
- }
- if (necp_fd_mtx_grp != NULL) {
- lck_grp_free(necp_fd_mtx_grp);
- necp_fd_mtx_grp = NULL;
- }
- if (necp_fd_grp_attr != NULL) {
- lck_grp_attr_free(necp_fd_grp_attr);
- necp_fd_grp_attr = NULL;
- }
- }
- return (result);
+ RB_INIT(&necp_client_global_tree);
+ RB_INIT(&necp_client_flow_global_tree);
+
+ return (0);
+}
+
+void
+necp_client_reap_caches(boolean_t purge)
+{
+ mcache_reap_now(necp_flow_cache, purge);
+ mcache_reap_now(necp_flow_registration_cache, purge);
}
+
projects / apple / xnu.git / blobdiff