+/*
+ * Copyright (c) 2004-2016 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
/*
* Copyright (c) 2002 Luigi Rizzo, Universita` di Pisa
*
#error IPFIREWALL requires INET.
#endif /* INET */
-#ifdef IPFW2
-#include <machine/spl.h>
+#if IPFW2
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
+#include <sys/mcache.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/ucred.h>
+#include <sys/kern_event.h>
+#include <sys/kauth.h>
+
#include <net/if.h>
+#include <net/net_kev.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <stdarg.h>
/*
-#include <machine/in_cksum.h>
-*/ /* XXX for in_cksum */
+ #include <machine/in_cksum.h>
+ */ /* XXX for in_cksum */
/*
* XXX This one should go in sys/mbuf.h. It is used to avoid that
* a firewall-generated packet loops forever through the firewall.
*/
-#ifndef M_SKIP_FIREWALL
+#ifndef M_SKIP_FIREWALL
#define M_SKIP_FIREWALL 0x4000
#endif
int fw_verbose;
static int verbose_limit;
-
-#define IPFW_DEFAULT_RULE 65535
+extern int fw_bypass;
#define IPFW_RULE_INACTIVE 1
MALLOC_DEFINE(M_IPFW, "IpFw/IpAcct", "IpFw/IpAcct chain's");
-static int fw_debug = 1;
+static int fw_debug = 0;
static int autoinc_step = 100; /* bounded to 1..1000 in add_rule() */
+static void ipfw_kev_post_msg(u_int32_t );
+
+static int Get32static_len(void);
+static int Get64static_len(void);
+
#ifdef SYSCTL_NODE
-SYSCTL_NODE(_net_inet_ip, OID_AUTO, fw, CTLFLAG_RW, 0, "Firewall");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, enable,
- CTLFLAG_RW,
- &fw_enable, 0, "Enable ipfw");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, autoinc_step, CTLFLAG_RW,
+
+static int ipfw_sysctl SYSCTL_HANDLER_ARGS;
+
+SYSCTL_NODE(_net_inet_ip, OID_AUTO, fw, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Firewall");
+SYSCTL_PROC(_net_inet_ip_fw, OID_AUTO, enable,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &fw_enable, 0, ipfw_sysctl, "I", "Enable ipfw");
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, autoinc_step, CTLFLAG_RW | CTLFLAG_LOCKED,
&autoinc_step, 0, "Rule number autincrement step");
SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, one_pass,
- CTLFLAG_RW,
+ CTLFLAG_RW | CTLFLAG_LOCKED,
&fw_one_pass, 0,
"Only do a single pass through ipfw when using dummynet(4)");
SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, debug,
- CTLFLAG_RW,
+ CTLFLAG_RW | CTLFLAG_LOCKED,
&fw_debug, 0, "Enable printing of debug ip_fw statements");
SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, verbose,
- CTLFLAG_RW,
+ CTLFLAG_RW | CTLFLAG_LOCKED,
&fw_verbose, 0, "Log matches to ipfw rules");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, verbose_limit, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, verbose_limit, CTLFLAG_RW | CTLFLAG_LOCKED,
&verbose_limit, 0, "Set upper limit of matches of ipfw rules logged");
+/*
+ * IP FW Stealth Logging:
+ */
+typedef enum ipfw_stealth_stats_type {
+ IPFW_STEALTH_STATS_UDP,
+ IPFW_STEALTH_STATS_TCP,
+ IPFW_STEALTH_STATS_UDPv6,
+ IPFW_STEALTH_STATS_TCPv6,
+ IPFW_STEALTH_STATS_MAX,
+} ipfw_stealth_stats_type_t;
+
+#define IPFW_STEALTH_TIMEOUT_SEC 30
+
+#define DYN_KEEPALIVE_LEEWAY 15
+
+// Piggybagging Stealth stats with ipfw_tick().
+#define IPFW_STEALTH_TIMEOUT_FREQUENCY (30 / dyn_keepalive_period)
+
+static const char* ipfw_stealth_stats_str[IPFW_STEALTH_STATS_MAX] = {
+ "UDP", "TCP", "UDP v6", "TCP v6",
+};
+
+static uint32_t ipfw_stealth_stats_needs_flush = FALSE;
+static uint32_t ipfw_stealth_stats[IPFW_STEALTH_STATS_MAX];
+
+static void ipfw_stealth_flush_stats(void);
+void ipfw_stealth_stats_incr_udp(void);
+void ipfw_stealth_stats_incr_tcp(void);
+void ipfw_stealth_stats_incr_udpv6(void);
+void ipfw_stealth_stats_incr_tcpv6(void);
+
/*
* Description of dynamic rules.
*
* than dyn_keepalive_period.
*/
-static u_int32_t dyn_keepalive_interval = 20;
+static u_int32_t dyn_keepalive_interval = 25;
static u_int32_t dyn_keepalive_period = 5;
-static u_int32_t dyn_keepalive = 1; /* do send keepalives */
+static u_int32_t dyn_keepalive = 1; /* do send keepalives */
-static u_int32_t static_count; /* # of static rules */
-static u_int32_t static_len; /* size in bytes of static rules */
-static u_int32_t dyn_count; /* # of dynamic rules */
-static u_int32_t dyn_max = 4096; /* max # of dynamic rules */
+static u_int32_t static_count; /* # of static rules */
+static u_int32_t static_len; /* size in bytes of static rules */
+static u_int32_t static_len_32; /* size in bytes of static rules for 32 bit client */
+static u_int32_t static_len_64; /* size in bytes of static rules for 64 bit client */
+static u_int32_t dyn_count; /* # of dynamic rules */
+static u_int32_t dyn_max = 4096; /* max # of dynamic rules */
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_buckets, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_buckets, CTLFLAG_RW | CTLFLAG_LOCKED,
&dyn_buckets, 0, "Number of dyn. buckets");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, curr_dyn_buckets, CTLFLAG_RD,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, curr_dyn_buckets, CTLFLAG_RD | CTLFLAG_LOCKED,
&curr_dyn_buckets, 0, "Current Number of dyn. buckets");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_count, CTLFLAG_RD,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_count, CTLFLAG_RD | CTLFLAG_LOCKED,
&dyn_count, 0, "Number of dyn. rules");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_max, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_max, CTLFLAG_RW | CTLFLAG_LOCKED,
&dyn_max, 0, "Max number of dyn. rules");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, static_count, CTLFLAG_RD,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, static_count, CTLFLAG_RD | CTLFLAG_LOCKED,
&static_count, 0, "Number of static rules");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_ack_lifetime, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_ack_lifetime, CTLFLAG_RW | CTLFLAG_LOCKED,
&dyn_ack_lifetime, 0, "Lifetime of dyn. rules for acks");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_syn_lifetime, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_syn_lifetime, CTLFLAG_RW | CTLFLAG_LOCKED,
&dyn_syn_lifetime, 0, "Lifetime of dyn. rules for syn");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_fin_lifetime, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_fin_lifetime, CTLFLAG_RW | CTLFLAG_LOCKED,
&dyn_fin_lifetime, 0, "Lifetime of dyn. rules for fin");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_rst_lifetime, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_rst_lifetime, CTLFLAG_RW | CTLFLAG_LOCKED,
&dyn_rst_lifetime, 0, "Lifetime of dyn. rules for rst");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_udp_lifetime, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_udp_lifetime, CTLFLAG_RW | CTLFLAG_LOCKED,
&dyn_udp_lifetime, 0, "Lifetime of dyn. rules for UDP");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_short_lifetime, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_short_lifetime, CTLFLAG_RW | CTLFLAG_LOCKED,
&dyn_short_lifetime, 0, "Lifetime of dyn. rules for other situations");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_keepalive, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, dyn_keepalive, CTLFLAG_RW | CTLFLAG_LOCKED,
&dyn_keepalive, 0, "Enable keepalives for dyn. rules");
+
+static int
+ipfw_sysctl SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+ int error;
+
+ error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
+ if (error || !req->newptr) {
+ return error;
+ }
+
+ ipfw_kev_post_msg(KEV_IPFW_ENABLE);
+
+ return error;
+}
+
#endif /* SYSCTL_NODE */
-static ip_fw_chk_t ipfw_chk;
+static ip_fw_chk_t ipfw_chk;
/* firewall lock */
lck_grp_t *ipfw_mutex_grp;
lck_grp_attr_t *ipfw_mutex_grp_attr;
lck_attr_t *ipfw_mutex_attr;
-lck_mtx_t *ipfw_mutex;
-
-extern void ipfwsyslog( int level, char *format,...);
-
-#if DUMMYNET
-ip_dn_ruledel_t *ip_dn_ruledel_ptr = NULL; /* hook into dummynet */
-#endif /* DUMMYNET */
+decl_lck_mtx_data(, ipfw_mutex_data);
+lck_mtx_t *ipfw_mutex = &ipfw_mutex_data;
-#define KEV_LOG_SUBCLASS 10
-#define IPFWLOGEVENT 0
+extern void ipfwsyslog( int level, const char *format, ...);
#define ipfwstring "ipfw:"
-static size_t ipfwstringlen;
+static size_t ipfwstringlen;
-#define dolog( a ) { \
- if ( fw_verbose == 2 ) /* Apple logging, log to ipfw.log */ \
- ipfwsyslog a ; \
- else log a ; \
+#define dolog( a ) { \
+ if ( fw_verbose == 2 ) /* Apple logging, log to ipfw.log */ \
+ ipfwsyslog a ; \
+ else log a ; \
}
-void ipfwsyslog( int level, char *format,...)
+#define RULESIZE64(rule) (sizeof(struct ip_fw_64) + \
+ ((struct ip_fw *)(rule))->cmd_len * 4 - 4)
+
+#define RULESIZE32(rule) (sizeof(struct ip_fw_32) + \
+ ((struct ip_fw *)(rule))->cmd_len * 4 - 4)
+
+void
+ipfwsyslog( int level, const char *format, ...)
{
-#define msgsize 100
+#define msgsize 100
- struct kev_msg ev_msg;
- va_list ap;
- char msgBuf[msgsize];
- char *dptr = msgBuf;
- unsigned char pri;
- int loglen;
+ struct kev_msg ev_msg;
+ va_list ap;
+ char msgBuf[msgsize];
+ char *dptr = msgBuf;
+ unsigned char pri;
+ int loglen;
+ bzero(msgBuf, msgsize);
+ bzero(&ev_msg, sizeof(struct kev_msg));
va_start( ap, format );
- loglen = vsnprintf(msgBuf, msgsize, format, ap);
- va_end( ap );
+ loglen = vsnprintf(msgBuf, msgsize, format, ap);
+ va_end( ap );
- ev_msg.vendor_code = KEV_VENDOR_APPLE;
- ev_msg.kev_class = KEV_NETWORK_CLASS;
- ev_msg.kev_subclass = KEV_LOG_SUBCLASS;
- ev_msg.event_code = IPFWLOGEVENT;
+ ev_msg.vendor_code = KEV_VENDOR_APPLE;
+ ev_msg.kev_class = KEV_NETWORK_CLASS;
+ ev_msg.kev_subclass = KEV_LOG_SUBCLASS;
+ ev_msg.event_code = IPFWLOGEVENT;
/* get rid of the trailing \n */
- dptr[loglen-1] = 0;
-
- pri = LOG_PRI(level);
-
- /* remove "ipfw:" prefix if logging to ipfw log */
- if ( !(strncmp( ipfwstring, msgBuf, ipfwstringlen))){
- dptr = msgBuf+ipfwstringlen;
- }
-
- ev_msg.dv[0].data_ptr = &pri;
- ev_msg.dv[0].data_length = 1;
- ev_msg.dv[1].data_ptr = dptr;
- ev_msg.dv[1].data_length = 100; /* bug in kern_post_msg, it can't handle size > 256-msghdr */
- ev_msg.dv[2].data_length = 0;
-
- kev_post_msg(&ev_msg);
+ if (loglen < msgsize) {
+ dptr[loglen - 1] = 0;
+ } else {
+ dptr[msgsize - 1] = 0;
+ }
+
+ pri = LOG_PRI(level);
+
+ /* remove "ipfw:" prefix if logging to ipfw log */
+ if (!(strncmp( ipfwstring, msgBuf, ipfwstringlen))) {
+ dptr = msgBuf + ipfwstringlen;
+ }
+
+ ev_msg.dv[0].data_ptr = &pri;
+ ev_msg.dv[0].data_length = 1;
+ ev_msg.dv[1].data_ptr = dptr;
+ ev_msg.dv[1].data_length = 100; /* bug in kern_post_msg, it can't handle size > 256-msghdr */
+ ev_msg.dv[2].data_length = 0;
+
+ kev_post_msg(&ev_msg);
+}
+
+static inline void
+ipfw_stealth_stats_incr(uint32_t type)
+{
+ if (type >= IPFW_STEALTH_STATS_MAX) {
+ return;
+ }
+
+ ipfw_stealth_stats[type]++;
+
+ if (!ipfw_stealth_stats_needs_flush) {
+ ipfw_stealth_stats_needs_flush = TRUE;
+ }
+}
+
+void
+ipfw_stealth_stats_incr_udp(void)
+{
+ ipfw_stealth_stats_incr(IPFW_STEALTH_STATS_UDP);
+}
+
+void
+ipfw_stealth_stats_incr_tcp(void)
+{
+ ipfw_stealth_stats_incr(IPFW_STEALTH_STATS_TCP);
+}
+
+void
+ipfw_stealth_stats_incr_udpv6(void)
+{
+ ipfw_stealth_stats_incr(IPFW_STEALTH_STATS_UDPv6);
+}
+
+void
+ipfw_stealth_stats_incr_tcpv6(void)
+{
+ ipfw_stealth_stats_incr(IPFW_STEALTH_STATS_TCPv6);
+}
+
+static void
+ipfw_stealth_flush_stats(void)
+{
+ int i;
+
+ for (i = 0; i < IPFW_STEALTH_STATS_MAX; i++) {
+ if (ipfw_stealth_stats[i]) {
+ ipfwsyslog(LOG_INFO, "Stealth Mode connection attempt to %s %d times",
+ ipfw_stealth_stats_str[i], ipfw_stealth_stats[i]);
+ ipfw_stealth_stats[i] = 0;
+ }
+ }
+ ipfw_stealth_stats_needs_flush = FALSE;
}
/*
* This macro maps an ip pointer into a layer3 header pointer of type T
*/
-#define L3HDR(T, ip) ((T *)((u_int32_t *)(ip) + (ip)->ip_hl))
+#define L3HDR(T, ip) ((T *)((u_int32_t *)(ip) + (ip)->ip_hl))
static __inline int
icmptype_match(struct ip *ip, ipfw_insn_u32 *cmd)
{
- int type = L3HDR(struct icmp,ip)->icmp_type;
+ int type = L3HDR(struct icmp, ip)->icmp_type;
- return (type <= ICMP_MAXTYPE && (cmd->d[0] & (1<<type)) );
+ return type <= ICMP_MAXTYPE && (cmd->d[0] & (1 << type));
}
-#define TT ( (1 << ICMP_ECHO) | (1 << ICMP_ROUTERSOLICIT) | \
+#define TT ( (1 << ICMP_ECHO) | (1 << ICMP_ROUTERSOLICIT) | \
(1 << ICMP_TSTAMP) | (1 << ICMP_IREQ) | (1 << ICMP_MASKREQ) )
static int
is_icmp_query(struct ip *ip)
{
int type = L3HDR(struct icmp, ip)->icmp_type;
- return (type <= ICMP_MAXTYPE && (TT & (1<<type)) );
+ return type <= ICMP_MAXTYPE && (TT & (1 << type));
}
#undef TT
+static int
+Get32static_len(void)
+{
+ int diff;
+ int len = static_len_32;
+ struct ip_fw *rule;
+ char *useraction;
+
+ for (rule = layer3_chain; rule; rule = rule->next) {
+ if (rule->reserved_1 == IPFW_RULE_INACTIVE) {
+ continue;
+ }
+ if (rule->act_ofs) {
+ useraction = (char*)ACTION_PTR( rule );
+ if (((ipfw_insn*)useraction)->opcode == O_QUEUE || ((ipfw_insn*)useraction)->opcode == O_PIPE) {
+ diff = sizeof(ipfw_insn_pipe) - sizeof(ipfw_insn_pipe_32);
+ if (diff) {
+ len -= diff;
+ }
+ }
+ }
+ }
+ return len;
+}
+
+static int
+Get64static_len(void)
+{
+ int diff;
+ int len = static_len_64;
+ struct ip_fw *rule;
+ char *useraction;
+
+ for (rule = layer3_chain; rule; rule = rule->next) {
+ if (rule->reserved_1 == IPFW_RULE_INACTIVE) {
+ continue;
+ }
+ if (rule->act_ofs) {
+ useraction = (char *)ACTION_PTR( rule );
+ if (((ipfw_insn*)useraction)->opcode == O_QUEUE || ((ipfw_insn*)useraction)->opcode == O_PIPE) {
+ diff = sizeof(ipfw_insn_pipe_64) - sizeof(ipfw_insn_pipe);
+ if (diff) {
+ len += diff;
+ }
+ }
+ }
+ }
+ return len;
+}
+
+static void
+copyto32fw_insn( struct ip_fw_32 *fw32, struct ip_fw *user_ip_fw, int cmdsize)
+{
+ char *end;
+ char *fw32action;
+ char *useraction;
+ int justcmdsize;
+ int diff = 0;
+ int actioncopysize;
+
+ end = ((char*)user_ip_fw->cmd) + cmdsize;
+ useraction = (char*)ACTION_PTR( user_ip_fw );
+ fw32action = (char*)fw32->cmd + (user_ip_fw->act_ofs * sizeof(uint32_t));
+ if ((justcmdsize = (fw32action - (char*)fw32->cmd))) {
+ bcopy( user_ip_fw->cmd, fw32->cmd, justcmdsize);
+ }
+ while (useraction < end) {
+ if (((ipfw_insn*)useraction)->opcode == O_QUEUE || ((ipfw_insn*)useraction)->opcode == O_PIPE) {
+ actioncopysize = sizeof(ipfw_insn_pipe_32);
+ ((ipfw_insn*)fw32action)->opcode = ((ipfw_insn*)useraction)->opcode;
+ ((ipfw_insn*)fw32action)->arg1 = ((ipfw_insn*)useraction)->arg1;
+ ((ipfw_insn*)fw32action)->len = F_INSN_SIZE(ipfw_insn_pipe_32);
+ diff = ((ipfw_insn*)useraction)->len - ((ipfw_insn*)fw32action)->len;
+ if (diff) {
+ fw32->cmd_len -= diff;
+ }
+ } else {
+ actioncopysize = (F_LEN((ipfw_insn*)useraction) ? (F_LEN((ipfw_insn*)useraction)) : 1) * sizeof(uint32_t);
+ bcopy( useraction, fw32action, actioncopysize );
+ }
+ useraction += (F_LEN((ipfw_insn*)useraction) ? (F_LEN((ipfw_insn*)useraction)) : 1) * sizeof(uint32_t);
+ fw32action += actioncopysize;
+ }
+}
+
+static void
+copyto64fw_insn( struct ip_fw_64 *fw64, struct ip_fw *user_ip_fw, int cmdsize)
+{
+ char *end;
+ char *fw64action;
+ char *useraction;
+ int justcmdsize;
+ int diff;
+ int actioncopysize;
+
+ end = ((char *)user_ip_fw->cmd) + cmdsize;
+ useraction = (char*)ACTION_PTR( user_ip_fw );
+ if ((justcmdsize = (useraction - (char*)user_ip_fw->cmd))) {
+ bcopy( user_ip_fw->cmd, fw64->cmd, justcmdsize);
+ }
+ fw64action = (char*)fw64->cmd + justcmdsize;
+ while (useraction < end) {
+ if (((ipfw_insn*)user_ip_fw)->opcode == O_QUEUE || ((ipfw_insn*)user_ip_fw)->opcode == O_PIPE) {
+ actioncopysize = sizeof(ipfw_insn_pipe_64);
+ ((ipfw_insn*)fw64action)->opcode = ((ipfw_insn*)useraction)->opcode;
+ ((ipfw_insn*)fw64action)->arg1 = ((ipfw_insn*)useraction)->arg1;
+ ((ipfw_insn*)fw64action)->len = F_INSN_SIZE(ipfw_insn_pipe_64);
+ diff = ((ipfw_insn*)fw64action)->len - ((ipfw_insn*)useraction)->len;
+ if (diff) {
+ fw64->cmd_len += diff;
+ }
+ } else {
+ actioncopysize = (F_LEN((ipfw_insn*)useraction) ? (F_LEN((ipfw_insn*)useraction)) : 1) * sizeof(uint32_t);
+ bcopy( useraction, fw64action, actioncopysize );
+ }
+ useraction += (F_LEN((ipfw_insn*)useraction) ? (F_LEN((ipfw_insn*)useraction)) : 1) * sizeof(uint32_t);
+ fw64action += actioncopysize;
+ }
+}
+
+static void
+copyto32fw( struct ip_fw *user_ip_fw, struct ip_fw_32 *fw32, __unused size_t copysize)
+{
+ size_t rulesize, cmdsize;
+
+ fw32->version = user_ip_fw->version;
+ fw32->context = CAST_DOWN_EXPLICIT( user32_addr_t, user_ip_fw->context);
+ fw32->next = CAST_DOWN_EXPLICIT(user32_addr_t, user_ip_fw->next);
+ fw32->next_rule = CAST_DOWN_EXPLICIT(user32_addr_t, user_ip_fw->next_rule);
+ fw32->act_ofs = user_ip_fw->act_ofs;
+ fw32->cmd_len = user_ip_fw->cmd_len;
+ fw32->rulenum = user_ip_fw->rulenum;
+ fw32->set = user_ip_fw->set;
+ fw32->set_masks[0] = user_ip_fw->set_masks[0];
+ fw32->set_masks[1] = user_ip_fw->set_masks[1];
+ fw32->pcnt = user_ip_fw->pcnt;
+ fw32->bcnt = user_ip_fw->bcnt;
+ fw32->timestamp = user_ip_fw->timestamp;
+ fw32->reserved_1 = user_ip_fw->reserved_1;
+ fw32->reserved_2 = user_ip_fw->reserved_2;
+ rulesize = sizeof(struct ip_fw_32) + (user_ip_fw->cmd_len * sizeof(ipfw_insn) - 4);
+ cmdsize = user_ip_fw->cmd_len * sizeof(u_int32_t);
+ copyto32fw_insn( fw32, user_ip_fw, cmdsize );
+}
+
+static void
+copyto64fw( struct ip_fw *user_ip_fw, struct ip_fw_64 *fw64, size_t copysize)
+{
+ size_t rulesize, cmdsize;
+
+ fw64->version = user_ip_fw->version;
+ fw64->context = CAST_DOWN_EXPLICIT(__uint64_t, user_ip_fw->context);
+ fw64->next = CAST_DOWN_EXPLICIT(user64_addr_t, user_ip_fw->next);
+ fw64->next_rule = CAST_DOWN_EXPLICIT(user64_addr_t, user_ip_fw->next_rule);
+ fw64->act_ofs = user_ip_fw->act_ofs;
+ fw64->cmd_len = user_ip_fw->cmd_len;
+ fw64->rulenum = user_ip_fw->rulenum;
+ fw64->set = user_ip_fw->set;
+ fw64->set_masks[0] = user_ip_fw->set_masks[0];
+ fw64->set_masks[1] = user_ip_fw->set_masks[1];
+ fw64->pcnt = user_ip_fw->pcnt;
+ fw64->bcnt = user_ip_fw->bcnt;
+ fw64->timestamp = user_ip_fw->timestamp;
+ fw64->reserved_1 = user_ip_fw->reserved_1;
+ fw64->reserved_2 = user_ip_fw->reserved_2;
+ rulesize = sizeof(struct ip_fw_64) + (user_ip_fw->cmd_len * sizeof(ipfw_insn) - 4);
+ if (rulesize > copysize) {
+ cmdsize = copysize - sizeof(struct ip_fw_64) + 4;
+ } else {
+ cmdsize = user_ip_fw->cmd_len * sizeof(u_int32_t);
+ }
+ copyto64fw_insn( fw64, user_ip_fw, cmdsize);
+}
+
+static int
+copyfrom32fw_insn( struct ip_fw_32 *fw32, struct ip_fw *user_ip_fw, int cmdsize)
+{
+ char *end;
+ char *fw32action;
+ char *useraction;
+ int justcmdsize;
+ int diff;
+ int actioncopysize;
+
+ end = ((char*)fw32->cmd) + cmdsize;
+ fw32action = (char*)ACTION_PTR( fw32 );
+ if ((justcmdsize = (fw32action - (char*)fw32->cmd))) {
+ bcopy( fw32->cmd, user_ip_fw->cmd, justcmdsize);
+ }
+ useraction = (char*)user_ip_fw->cmd + justcmdsize;
+ while (fw32action < end) {
+ if (((ipfw_insn*)fw32action)->opcode == O_QUEUE || ((ipfw_insn*)fw32action)->opcode == O_PIPE) {
+ actioncopysize = sizeof(ipfw_insn_pipe);
+ ((ipfw_insn*)useraction)->opcode = ((ipfw_insn*)fw32action)->opcode;
+ ((ipfw_insn*)useraction)->arg1 = ((ipfw_insn*)fw32action)->arg1;
+ ((ipfw_insn*)useraction)->len = F_INSN_SIZE(ipfw_insn_pipe);
+ diff = ((ipfw_insn*)useraction)->len - ((ipfw_insn*)fw32action)->len;
+ if (diff) {
+ /* readjust the cmd_len */
+ user_ip_fw->cmd_len += diff;
+ }
+ } else {
+ actioncopysize = (F_LEN((ipfw_insn*)fw32action) ? (F_LEN((ipfw_insn*)fw32action)) : 1) * sizeof(uint32_t);
+ bcopy( fw32action, useraction, actioncopysize );
+ }
+ fw32action += (F_LEN((ipfw_insn*)fw32action) ? (F_LEN((ipfw_insn*)fw32action)) : 1) * sizeof(uint32_t);
+ useraction += actioncopysize;
+ }
+
+ return useraction - (char*)user_ip_fw->cmd;
+}
+
+static int
+copyfrom64fw_insn( struct ip_fw_64 *fw64, struct ip_fw *user_ip_fw, int cmdsize)
+{
+ char *end;
+ char *fw64action;
+ char *useraction;
+ int justcmdsize;
+ int diff;
+ int actioncopysize;
+
+ end = ((char *)fw64->cmd) + cmdsize;
+ fw64action = (char*)ACTION_PTR( fw64 );
+ if ((justcmdsize = (fw64action - (char*)fw64->cmd))) {
+ bcopy( fw64->cmd, user_ip_fw->cmd, justcmdsize);
+ }
+ useraction = (char*)user_ip_fw->cmd + justcmdsize;
+ while (fw64action < end) {
+ if (((ipfw_insn*)fw64action)->opcode == O_QUEUE || ((ipfw_insn*)fw64action)->opcode == O_PIPE) {
+ actioncopysize = sizeof(ipfw_insn_pipe);
+ ((ipfw_insn*)useraction)->opcode = ((ipfw_insn*)fw64action)->opcode;
+ ((ipfw_insn*)useraction)->arg1 = ((ipfw_insn*)fw64action)->arg1;
+ ((ipfw_insn*)useraction)->len = F_INSN_SIZE(ipfw_insn_pipe);
+ diff = ((ipfw_insn*)fw64action)->len - ((ipfw_insn*)useraction)->len;
+ if (diff) {
+ /* readjust the cmd_len */
+ user_ip_fw->cmd_len -= diff;
+ }
+ } else {
+ actioncopysize = (F_LEN((ipfw_insn*)fw64action) ? (F_LEN((ipfw_insn*)fw64action)) : 1) * sizeof(uint32_t);
+ bcopy( fw64action, useraction, actioncopysize );
+ }
+ fw64action += (F_LEN((ipfw_insn*)fw64action) ? (F_LEN((ipfw_insn*)fw64action)) : 1) * sizeof(uint32_t);
+ useraction += actioncopysize;
+ }
+ return useraction - (char*)user_ip_fw->cmd;
+}
+
+static size_t
+copyfrom32fw( struct ip_fw_32 *fw32, struct ip_fw *user_ip_fw, size_t copysize)
+{
+ size_t rulesize, cmdsize;
+
+ user_ip_fw->version = fw32->version;
+ user_ip_fw->context = CAST_DOWN(void *, fw32->context);
+ user_ip_fw->next = CAST_DOWN(struct ip_fw*, fw32->next);
+ user_ip_fw->next_rule = CAST_DOWN_EXPLICIT(struct ip_fw*, fw32->next_rule);
+ user_ip_fw->act_ofs = fw32->act_ofs;
+ user_ip_fw->cmd_len = fw32->cmd_len;
+ user_ip_fw->rulenum = fw32->rulenum;
+ user_ip_fw->set = fw32->set;
+ user_ip_fw->set_masks[0] = fw32->set_masks[0];
+ user_ip_fw->set_masks[1] = fw32->set_masks[1];
+ user_ip_fw->pcnt = fw32->pcnt;
+ user_ip_fw->bcnt = fw32->bcnt;
+ user_ip_fw->timestamp = fw32->timestamp;
+ user_ip_fw->reserved_1 = fw32->reserved_1;
+ user_ip_fw->reserved_2 = fw32->reserved_2;
+ rulesize = sizeof(struct ip_fw_32) + (fw32->cmd_len * sizeof(ipfw_insn) - 4);
+ if (rulesize > copysize) {
+ cmdsize = copysize - sizeof(struct ip_fw_32) - 4;
+ } else {
+ cmdsize = fw32->cmd_len * sizeof(ipfw_insn);
+ }
+ cmdsize = copyfrom32fw_insn( fw32, user_ip_fw, cmdsize);
+ return sizeof(struct ip_fw) + cmdsize - 4;
+}
+
+static size_t
+copyfrom64fw( struct ip_fw_64 *fw64, struct ip_fw *user_ip_fw, size_t copysize)
+{
+ size_t rulesize, cmdsize;
+
+ user_ip_fw->version = fw64->version;
+ user_ip_fw->context = CAST_DOWN_EXPLICIT( void *, fw64->context);
+ user_ip_fw->next = CAST_DOWN_EXPLICIT(struct ip_fw*, fw64->next);
+ user_ip_fw->next_rule = CAST_DOWN_EXPLICIT(struct ip_fw*, fw64->next_rule);
+ user_ip_fw->act_ofs = fw64->act_ofs;
+ user_ip_fw->cmd_len = fw64->cmd_len;
+ user_ip_fw->rulenum = fw64->rulenum;
+ user_ip_fw->set = fw64->set;
+ user_ip_fw->set_masks[0] = fw64->set_masks[0];
+ user_ip_fw->set_masks[1] = fw64->set_masks[1];
+ user_ip_fw->pcnt = fw64->pcnt;
+ user_ip_fw->bcnt = fw64->bcnt;
+ user_ip_fw->timestamp = fw64->timestamp;
+ user_ip_fw->reserved_1 = fw64->reserved_1;
+ user_ip_fw->reserved_2 = fw64->reserved_2;
+ //bcopy( fw64->cmd, user_ip_fw->cmd, fw64->cmd_len * sizeof(ipfw_insn));
+ rulesize = sizeof(struct ip_fw_64) + (fw64->cmd_len * sizeof(ipfw_insn) - 4);
+ if (rulesize > copysize) {
+ cmdsize = copysize - sizeof(struct ip_fw_64) - 4;
+ } else {
+ cmdsize = fw64->cmd_len * sizeof(ipfw_insn);
+ }
+ cmdsize = copyfrom64fw_insn( fw64, user_ip_fw, cmdsize);
+ return sizeof(struct ip_fw) + cmdsize - 4;
+}
+
+void
+externalize_flow_id(struct ipfw_flow_id *dst, struct ip_flow_id *src);
+void
+externalize_flow_id(struct ipfw_flow_id *dst, struct ip_flow_id *src)
+{
+ dst->dst_ip = src->dst_ip;
+ dst->src_ip = src->src_ip;
+ dst->dst_port = src->dst_port;
+ dst->src_port = src->src_port;
+ dst->proto = src->proto;
+ dst->flags = src->flags;
+}
+
+static
+void
+cp_dyn_to_comp_32( struct ipfw_dyn_rule_compat_32 *dyn_rule_vers1, int *len)
+{
+ struct ipfw_dyn_rule_compat_32 *dyn_last = NULL;
+ ipfw_dyn_rule *p;
+ int i;
+
+ if (ipfw_dyn_v) {
+ for (i = 0; i < curr_dyn_buckets; i++) {
+ for (p = ipfw_dyn_v[i]; p != NULL; p = p->next) {
+ dyn_rule_vers1->chain = (user32_addr_t)(p->rule->rulenum);
+ externalize_flow_id(&dyn_rule_vers1->id, &p->id);
+ externalize_flow_id(&dyn_rule_vers1->mask, &p->id);
+ dyn_rule_vers1->type = p->dyn_type;
+ dyn_rule_vers1->expire = p->expire;
+ dyn_rule_vers1->pcnt = p->pcnt;
+ dyn_rule_vers1->bcnt = p->bcnt;
+ dyn_rule_vers1->bucket = p->bucket;
+ dyn_rule_vers1->state = p->state;
+
+ dyn_rule_vers1->next = CAST_DOWN_EXPLICIT( user32_addr_t, p->next);
+ dyn_last = dyn_rule_vers1;
+
+ *len += sizeof(*dyn_rule_vers1);
+ dyn_rule_vers1++;
+ }
+ }
+
+ if (dyn_last != NULL) {
+ dyn_last->next = ((user32_addr_t)0);
+ }
+ }
+}
+
+
+static
+void
+cp_dyn_to_comp_64( struct ipfw_dyn_rule_compat_64 *dyn_rule_vers1, int *len)
+{
+ struct ipfw_dyn_rule_compat_64 *dyn_last = NULL;
+ ipfw_dyn_rule *p;
+ int i;
+
+ if (ipfw_dyn_v) {
+ for (i = 0; i < curr_dyn_buckets; i++) {
+ for (p = ipfw_dyn_v[i]; p != NULL; p = p->next) {
+ dyn_rule_vers1->chain = (user64_addr_t) p->rule->rulenum;
+ externalize_flow_id(&dyn_rule_vers1->id, &p->id);
+ externalize_flow_id(&dyn_rule_vers1->mask, &p->id);
+ dyn_rule_vers1->type = p->dyn_type;
+ dyn_rule_vers1->expire = p->expire;
+ dyn_rule_vers1->pcnt = p->pcnt;
+ dyn_rule_vers1->bcnt = p->bcnt;
+ dyn_rule_vers1->bucket = p->bucket;
+ dyn_rule_vers1->state = p->state;
+
+ dyn_rule_vers1->next = CAST_DOWN(user64_addr_t, p->next);
+ dyn_last = dyn_rule_vers1;
+
+ *len += sizeof(*dyn_rule_vers1);
+ dyn_rule_vers1++;
+ }
+ }
+
+ if (dyn_last != NULL) {
+ dyn_last->next = CAST_DOWN(user64_addr_t, NULL);
+ }
+ }
+}
+
+static int
+sooptcopyin_fw( struct sockopt *sopt, struct ip_fw *user_ip_fw, size_t *size )
+{
+ size_t valsize, copyinsize = 0;
+ int error = 0;
+
+ valsize = sopt->sopt_valsize;
+ if (size) {
+ copyinsize = *size;
+ }
+ if (proc_is64bit(sopt->sopt_p)) {
+ struct ip_fw_64 *fw64 = NULL;
+
+ if (valsize < sizeof(struct ip_fw_64)) {
+ return EINVAL;
+ }
+ if (!copyinsize) {
+ copyinsize = sizeof(struct ip_fw_64);
+ }
+ if (valsize > copyinsize) {
+ sopt->sopt_valsize = valsize = copyinsize;
+ }
+
+ if (sopt->sopt_p != 0) {
+ fw64 = _MALLOC(copyinsize, M_TEMP, M_WAITOK);
+ if (fw64 == NULL) {
+ return ENOBUFS;
+ }
+ if ((error = copyin(sopt->sopt_val, fw64, valsize)) != 0) {
+ _FREE(fw64, M_TEMP);
+ return error;
+ }
+ } else {
+ bcopy(CAST_DOWN(caddr_t, sopt->sopt_val), fw64, valsize);
+ }
+ valsize = copyfrom64fw( fw64, user_ip_fw, valsize );
+ _FREE( fw64, M_TEMP);
+ } else {
+ struct ip_fw_32 *fw32 = NULL;
+
+ if (valsize < sizeof(struct ip_fw_32)) {
+ return EINVAL;
+ }
+ if (!copyinsize) {
+ copyinsize = sizeof(struct ip_fw_32);
+ }
+ if (valsize > copyinsize) {
+ sopt->sopt_valsize = valsize = copyinsize;
+ }
+
+ if (sopt->sopt_p != 0) {
+ fw32 = _MALLOC(copyinsize, M_TEMP, M_WAITOK);
+ if (fw32 == NULL) {
+ return ENOBUFS;
+ }
+ if ((error = copyin(sopt->sopt_val, fw32, valsize)) != 0) {
+ _FREE( fw32, M_TEMP);
+ return error;
+ }
+ } else {
+ bcopy(CAST_DOWN(caddr_t, sopt->sopt_val), fw32, valsize);
+ }
+ valsize = copyfrom32fw( fw32, user_ip_fw, valsize);
+ _FREE( fw32, M_TEMP);
+ }
+ if (size) {
+ *size = valsize;
+ }
+ return error;
+}
+
/*
* The following checks use two arrays of 8 or 16 bits to store the
* bits that we want set or clear, respectively. They are in the
u_char want_clear;
bits = ~bits;
- if ( ((cmd->arg1 & 0xff) & bits) != 0)
+ if (((cmd->arg1 & 0xff) & bits) != 0) {
return 0; /* some bits we want set were clear */
+ }
want_clear = (cmd->arg1 >> 8) & 0xff;
- if ( (want_clear & bits) != want_clear)
+ if ((want_clear & bits) != want_clear) {
return 0; /* some bits we want clear were set */
+ }
return 1;
}
{
int optlen, bits = 0;
u_char *cp = (u_char *)(ip + 1);
- int x = (ip->ip_hl << 2) - sizeof (struct ip);
+ int x = (ip->ip_hl << 2) - sizeof(struct ip);
for (; x > 0; x -= optlen, cp += optlen) {
int opt = cp[IPOPT_OPTVAL];
- if (opt == IPOPT_EOL)
+ if (opt == IPOPT_EOL) {
break;
- if (opt == IPOPT_NOP)
+ }
+ if (opt == IPOPT_NOP) {
optlen = 1;
- else {
+ } else {
optlen = cp[IPOPT_OLEN];
- if (optlen <= 0 || optlen > x)
+ if (optlen <= 0 || optlen > x) {
return 0; /* invalid or truncated */
+ }
}
switch (opt) {
-
default:
break;
break;
}
}
- return (flags_match(cmd, bits));
+ return flags_match(cmd, bits);
}
static int
tcpopts_match(struct ip *ip, ipfw_insn *cmd)
{
int optlen, bits = 0;
- struct tcphdr *tcp = L3HDR(struct tcphdr,ip);
+ struct tcphdr *tcp = L3HDR(struct tcphdr, ip);
u_char *cp = (u_char *)(tcp + 1);
int x = (tcp->th_off << 2) - sizeof(struct tcphdr);
for (; x > 0; x -= optlen, cp += optlen) {
int opt = cp[0];
- if (opt == TCPOPT_EOL)
+ if (opt == TCPOPT_EOL) {
break;
- if (opt == TCPOPT_NOP)
+ }
+ if (opt == TCPOPT_NOP) {
optlen = 1;
- else {
+ } else {
optlen = cp[1];
- if (optlen <= 0)
+ if (optlen <= 0) {
break;
+ }
}
switch (opt) {
-
default:
break;
break;
}
}
- return (flags_match(cmd, bits));
+ return flags_match(cmd, bits);
}
static int
iface_match(struct ifnet *ifp, ipfw_insn_if *cmd)
{
- if (ifp == NULL) /* no iface with this packet, match fails */
+ if (ifp == NULL) { /* no iface with this packet, match fails */
return 0;
+ }
/* Check by name or by IP address */
if (cmd->name[0] != '\0') { /* match by name */
/* Check unit number (-1 is wildcard) */
- if (cmd->p.unit != -1 && cmd->p.unit != ifp->if_unit)
- return(0);
+ if (cmd->p.unit != -1 && cmd->p.unit != ifp->if_unit) {
+ return 0;
+ }
/* Check name */
- if (!strncmp(ifp->if_name, cmd->name, IFNAMSIZ))
- return(1);
+ if (!strncmp(ifp->if_name, cmd->name, IFNAMSIZ)) {
+ return 1;
+ }
} else {
struct ifaddr *ia;
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) {
- if (ia->ifa_addr == NULL)
- continue;
- if (ia->ifa_addr->sa_family != AF_INET)
+ IFA_LOCK(ia);
+ if (ia->ifa_addr->sa_family != AF_INET) {
+ IFA_UNLOCK(ia);
continue;
+ }
if (cmd->p.ip.s_addr == ((struct sockaddr_in *)
(ia->ifa_addr))->sin_addr.s_addr) {
+ IFA_UNLOCK(ia);
ifnet_lock_done(ifp);
- return(1); /* match */
+ return 1; /* match */
}
+ IFA_UNLOCK(ia);
}
ifnet_lock_done(ifp);
}
- return(0); /* no match, fail ... */
+ return 0; /* no match, fail ... */
}
/*
static struct route ro;
struct sockaddr_in *dst;
+ bzero(&ro, sizeof(ro));
dst = (struct sockaddr_in *)&(ro.ro_dst);
/* Check if we've cached the route from the previous call. */
if (src.s_addr != dst->sin_addr.s_addr) {
- ro.ro_rt = NULL;
-
- bzero(dst, sizeof(*dst));
dst->sin_family = AF_INET;
dst->sin_len = sizeof(*dst);
dst->sin_addr = src;
- rtalloc_ign(&ro, RTF_CLONING|RTF_PRCLONING);
+ rtalloc_ign(&ro, RTF_CLONING | RTF_PRCLONING, false);
}
-
- if ((ro.ro_rt == NULL) || (ifp == NULL) ||
- (ro.ro_rt->rt_ifp->if_index != ifp->if_index))
+ if (ro.ro_rt != NULL) {
+ RT_LOCK_SPIN(ro.ro_rt);
+ } else {
+ ROUTE_RELEASE(&ro);
+ return 0; /* No route */
+ }
+ if ((ifp == NULL) ||
+ (ro.ro_rt->rt_ifp->if_index != ifp->if_index)) {
+ RT_UNLOCK(ro.ro_rt);
+ ROUTE_RELEASE(&ro);
return 0;
-
+ }
+ RT_UNLOCK(ro.ro_rt);
+ ROUTE_RELEASE(&ro);
return 1;
}
-static u_int64_t norule_counter; /* counter for ipfw_log(NULL...) */
+static u_int64_t norule_counter; /* counter for ipfw_log(NULL...) */
#define SNPARGS(buf, len) buf + len, sizeof(buf) > len ? sizeof(buf) - len : 0
#define SNP(buf) buf, sizeof(buf)
*/
static void
ipfw_log(struct ip_fw *f, u_int hlen, struct ether_header *eh,
- struct mbuf *m, struct ifnet *oif)
+ struct mbuf *m, struct ifnet *oif)
{
- char *action;
+ const char *action;
int limit_reached = 0;
char ipv4str[MAX_IPv4_STR_LEN];
char action2[40], proto[48], fragment[28];
-
+
fragment[0] = '\0';
proto[0] = '\0';
- if (f == NULL) { /* bogus pkt */
- if (verbose_limit != 0 && norule_counter >= verbose_limit)
+ if (f == NULL) { /* bogus pkt */
+ if (verbose_limit != 0 && norule_counter >= verbose_limit) {
return;
+ }
norule_counter++;
- if (norule_counter == verbose_limit)
+ if (norule_counter == verbose_limit) {
limit_reached = verbose_limit;
+ }
action = "Refuse";
- } else { /* O_LOG is the first action, find the real one */
+ } else { /* O_LOG is the first action, find the real one */
ipfw_insn *cmd = ACTION_PTR(f);
ipfw_insn_log *l = (ipfw_insn_log *)cmd;
- if (l->max_log != 0 && l->log_left == 0)
+ if (l->max_log != 0 && l->log_left == 0) {
return;
+ }
l->log_left--;
- if (l->log_left == 0)
+ if (l->log_left == 0) {
limit_reached = l->max_log;
- cmd += F_LEN(cmd); /* point to first action */
- if (cmd->opcode == O_PROB)
+ }
+ cmd += F_LEN(cmd); /* point to first action */
+ if (cmd->opcode == O_PROB) {
cmd += F_LEN(cmd);
+ }
action = action2;
switch (cmd->opcode) {
break;
case O_REJECT:
- if (cmd->arg1==ICMP_REJECT_RST)
+ if (cmd->arg1 == ICMP_REJECT_RST) {
action = "Reset";
- else if (cmd->arg1==ICMP_UNREACH_HOST)
+ } else if (cmd->arg1 == ICMP_UNREACH_HOST) {
action = "Reject";
- else
+ } else {
snprintf(SNPARGS(action2, 0), "Unreach %d",
- cmd->arg1);
+ cmd->arg1);
+ }
break;
case O_ACCEPT:
break;
case O_DIVERT:
snprintf(SNPARGS(action2, 0), "Divert %d",
- cmd->arg1);
+ cmd->arg1);
break;
case O_TEE:
snprintf(SNPARGS(action2, 0), "Tee %d",
- cmd->arg1);
+ cmd->arg1);
break;
case O_SKIPTO:
snprintf(SNPARGS(action2, 0), "SkipTo %d",
- cmd->arg1);
+ cmd->arg1);
break;
case O_PIPE:
snprintf(SNPARGS(action2, 0), "Pipe %d",
- cmd->arg1);
+ cmd->arg1);
break;
case O_QUEUE:
snprintf(SNPARGS(action2, 0), "Queue %d",
- cmd->arg1);
+ cmd->arg1);
break;
case O_FORWARD_IP: {
ipfw_insn_sa *sa = (ipfw_insn_sa *)cmd;
break;
}
len = snprintf(SNPARGS(action2, 0), "Forward to %s",
- inet_ntop(AF_INET, &sa->sa.sin_addr, ipv4str, sizeof(ipv4str)));
- if (sa->sa.sin_port)
+ inet_ntop(AF_INET, &sa->sa.sin_addr, ipv4str, sizeof(ipv4str)));
+ if (sa->sa.sin_port) {
snprintf(SNPARGS(action2, len), ":%d",
sa->sa.sin_port);
}
- break;
+ }
+ break;
default:
action = "UNKNOWN";
break;
}
}
- if (hlen == 0) { /* non-ip */
+ if (hlen == 0) { /* non-ip */
snprintf(SNPARGS(proto, 0), "MAC");
} else {
struct ip *ip = mtod(m, struct ip *);
case IPPROTO_TCP:
len = snprintf(SNPARGS(proto, 0), "TCP %s",
inet_ntop(AF_INET, &ip->ip_src, ipv4str, sizeof(ipv4str)));
- if (offset == 0)
+ if (offset == 0) {
snprintf(SNPARGS(proto, len), ":%d %s:%d",
ntohs(tcp->th_sport),
inet_ntop(AF_INET, &ip->ip_dst, ipv4str, sizeof(ipv4str)),
ntohs(tcp->th_dport));
- else
+ } else {
snprintf(SNPARGS(proto, len), " %s",
inet_ntop(AF_INET, &ip->ip_dst, ipv4str, sizeof(ipv4str)));
+ }
break;
case IPPROTO_UDP:
len = snprintf(SNPARGS(proto, 0), "UDP %s",
- inet_ntop(AF_INET, &ip->ip_src, ipv4str, sizeof(ipv4str)));
- if (offset == 0)
+ inet_ntop(AF_INET, &ip->ip_src, ipv4str, sizeof(ipv4str)));
+ if (offset == 0) {
snprintf(SNPARGS(proto, len), ":%d %s:%d",
ntohs(udp->uh_sport),
inet_ntop(AF_INET, &ip->ip_dst, ipv4str, sizeof(ipv4str)),
ntohs(udp->uh_dport));
- else
+ } else {
snprintf(SNPARGS(proto, len), " %s",
inet_ntop(AF_INET, &ip->ip_dst, ipv4str, sizeof(ipv4str)));
+ }
break;
case IPPROTO_ICMP:
- if (offset == 0)
+ if (offset == 0) {
len = snprintf(SNPARGS(proto, 0),
"ICMP:%u.%u ",
icmp->icmp_type, icmp->icmp_code);
- else
+ } else {
len = snprintf(SNPARGS(proto, 0), "ICMP ");
+ }
len += snprintf(SNPARGS(proto, len), "%s",
inet_ntop(AF_INET, &ip->ip_src, ipv4str, sizeof(ipv4str)));
snprintf(SNPARGS(proto, len), " %s",
break;
}
- if (ip_off & (IP_MF | IP_OFFMASK))
+ if (ip_off & (IP_MF | IP_OFFMASK)) {
snprintf(SNPARGS(fragment, 0), " (frag %d:%d@%d%s)",
- ntohs(ip->ip_id), ip_len - (ip->ip_hl << 2),
- offset << 3,
- (ip_off & IP_MF) ? "+" : "");
+ ntohs(ip->ip_id), ip_len - (ip->ip_hl << 2),
+ offset << 3,
+ (ip_off & IP_MF) ? "+" : "");
+ }
}
- if (oif || m->m_pkthdr.rcvif)
- {
+ if (oif || m->m_pkthdr.rcvif) {
dolog((LOG_AUTHPRIV | LOG_INFO,
"ipfw: %d %s %s %s via %s%d%s\n",
f ? f->rulenum : -1,
action, proto, oif ? "out" : "in",
oif ? oif->if_name : m->m_pkthdr.rcvif->if_name,
oif ? oif->if_unit : m->m_pkthdr.rcvif->if_unit,
- fragment));
- }
- else{
+ fragment));
+ } else {
dolog((LOG_AUTHPRIV | LOG_INFO,
"ipfw: %d %s %s [no if info]%s\n",
f ? f->rulenum : -1,
action, proto, fragment));
}
- if (limit_reached){
+ if (limit_reached) {
dolog((LOG_AUTHPRIV | LOG_NOTICE,
"ipfw: limit %d reached on entry %d\n",
limit_reached, f ? f->rulenum : -1));
* and we want to find both in the same bucket.
*/
static __inline int
-hash_packet(struct ipfw_flow_id *id)
+hash_packet(struct ip_flow_id *id)
{
u_int32_t i;
* head is a pointer to the head of the queue.
* Modifies q and potentially also head.
*/
-#define UNLINK_DYN_RULE(prev, head, q) { \
- ipfw_dyn_rule *old_q = q; \
- \
- /* remove a refcount to the parent */ \
- if (q->dyn_type == O_LIMIT) \
- q->parent->count--; \
+#define UNLINK_DYN_RULE(prev, head, q) { \
+ ipfw_dyn_rule *old_q = q; \
+ \
+ /* remove a refcount to the parent */ \
+ if (q->dyn_type == O_LIMIT) \
+ q->parent->count--; \
DEB(printf("ipfw: unlink entry 0x%08x %d -> 0x%08x %d, %d left\n",\
- (q->id.src_ip), (q->id.src_port), \
- (q->id.dst_ip), (q->id.dst_port), dyn_count-1 ); ) \
- if (prev != NULL) \
- prev->next = q = q->next; \
- else \
- head = q = q->next; \
- dyn_count--; \
+ (q->id.src_ip), (q->id.src_port), \
+ (q->id.dst_ip), (q->id.dst_port), dyn_count-1 ); ) \
+ if (prev != NULL) \
+ prev->next = q = q->next; \
+ else \
+ head = q = q->next; \
+ dyn_count--; \
_FREE(old_q, M_IPFW); }
-#define TIME_LEQ(a,b) ((int)((a)-(b)) <= 0)
+#define TIME_LEQ(a, b) ((int)((a)-(b)) <= 0)
/**
* Remove dynamic rules pointing to "rule", or all of them if rule == NULL.
getmicrotime(&timenow);
- if (ipfw_dyn_v == NULL || dyn_count == 0)
+ if (ipfw_dyn_v == NULL || dyn_count == 0) {
return;
+ }
/* do not expire more than once per second, it is useless */
- if (!FORCE && last_remove == timenow.tv_sec)
+ if (!FORCE && last_remove == timenow.tv_sec) {
return;
+ }
last_remove = timenow.tv_sec;
/*
* them in a second pass.
*/
next_pass:
- for (i = 0 ; i < curr_dyn_buckets ; i++) {
- for (prev=NULL, q = ipfw_dyn_v[i] ; q ; ) {
+ for (i = 0; i < curr_dyn_buckets; i++) {
+ for (prev = NULL, q = ipfw_dyn_v[i]; q;) {
/*
* Logic can become complex here, so we split tests.
*/
- if (q == keep_me)
+ if (q == keep_me) {
goto next;
- if (rule != NULL && rule != q->rule)
+ }
+ if (rule != NULL && rule != q->rule) {
goto next; /* not the one we are looking for */
+ }
if (q->dyn_type == O_LIMIT_PARENT) {
/*
* handle parent in the second pass,
* record we need one.
*/
max_pass = 1;
- if (pass == 0)
+ if (pass == 0) {
goto next;
- if (FORCE && q->count != 0 ) {
+ }
+ if (FORCE && q->count != 0) {
/* XXX should not happen! */
printf("ipfw: OUCH! cannot remove rule,"
- " count %d\n", q->count);
+ " count %d\n", q->count);
}
} else {
if (!FORCE &&
- !TIME_LEQ( q->expire, timenow.tv_sec ))
+ !TIME_LEQ( q->expire, timenow.tv_sec )) {
goto next;
+ }
}
if (q->dyn_type != O_LIMIT_PARENT || !q->count) {
UNLINK_DYN_RULE(prev, ipfw_dyn_v[i], q);
continue;
}
next:
- prev=q;
- q=q->next;
+ prev = q;
+ q = q->next;
}
}
- if (pass++ < max_pass)
+ if (pass++ < max_pass) {
goto next_pass;
+ }
}
* lookup a dynamic rule.
*/
static ipfw_dyn_rule *
-lookup_dyn_rule(struct ipfw_flow_id *pkt, int *match_direction,
- struct tcphdr *tcp)
+lookup_dyn_rule(struct ip_flow_id *pkt, int *match_direction,
+ struct tcphdr *tcp)
{
/*
* stateful ipfw extensions.
* Lookup into dynamic session queue
*/
-#define MATCH_REVERSE 0
-#define MATCH_FORWARD 1
-#define MATCH_NONE 2
-#define MATCH_UNKNOWN 3
+#define MATCH_REVERSE 0
+#define MATCH_FORWARD 1
+#define MATCH_NONE 2
+#define MATCH_UNKNOWN 3
#define BOTH_SYN (TH_SYN | (TH_SYN << 8))
#define BOTH_FIN (TH_FIN | (TH_FIN << 8))
int i, dir = MATCH_NONE;
- ipfw_dyn_rule *prev, *q=NULL;
+ ipfw_dyn_rule *prev, *q = NULL;
struct timeval timenow;
getmicrotime(&timenow);
- if (ipfw_dyn_v == NULL)
- goto done; /* not found */
+ if (ipfw_dyn_v == NULL) {
+ goto done; /* not found */
+ }
i = hash_packet( pkt );
- for (prev=NULL, q = ipfw_dyn_v[i] ; q != NULL ; ) {
- if (q->dyn_type == O_LIMIT_PARENT && q->count)
+ for (prev = NULL, q = ipfw_dyn_v[i]; q != NULL;) {
+ if (q->dyn_type == O_LIMIT_PARENT && q->count) {
goto next;
+ }
if (TIME_LEQ( q->expire, timenow.tv_sec)) { /* expire entry */
- int dounlink = 1;
+ int dounlink = 1;
/* check if entry is TCP */
- if ( q->id.proto == IPPROTO_TCP )
- {
- /* do not delete an established TCP connection which hasn't been closed by both sides */
- if ( (q->state & (BOTH_SYN | BOTH_FIN)) != (BOTH_SYN | BOTH_FIN) )
- dounlink = 0;
- }
- if ( dounlink ){
- UNLINK_DYN_RULE(prev, ipfw_dyn_v[i], q);
- continue;
- }
+ if (q->id.proto == IPPROTO_TCP) {
+ /* do not delete an established TCP connection which hasn't been closed by both sides */
+ if ((q->state & (BOTH_SYN | BOTH_FIN)) != (BOTH_SYN | BOTH_FIN)) {
+ dounlink = 0;
+ }
+ }
+ if (dounlink) {
+ UNLINK_DYN_RULE(prev, ipfw_dyn_v[i], q);
+ continue;
+ }
}
if (pkt->proto == q->id.proto &&
q->dyn_type != O_LIMIT_PARENT) {
if (pkt->src_ip == q->id.src_ip &&
pkt->dst_ip == q->id.dst_ip &&
pkt->src_port == q->id.src_port &&
- pkt->dst_port == q->id.dst_port ) {
+ pkt->dst_port == q->id.dst_port) {
dir = MATCH_FORWARD;
break;
}
if (pkt->src_ip == q->id.dst_ip &&
pkt->dst_ip == q->id.src_ip &&
pkt->src_port == q->id.dst_port &&
- pkt->dst_port == q->id.src_port ) {
+ pkt->dst_port == q->id.src_port) {
dir = MATCH_REVERSE;
break;
}
prev = q;
q = q->next;
}
- if (q == NULL)
+ if (q == NULL) {
goto done; /* q = NULL, not found */
-
- if ( prev != NULL) { /* found and not in front */
+ }
+ if (prev != NULL) { /* found and not in front */
prev->next = q->next;
q->next = ipfw_dyn_v[i];
ipfw_dyn_v[i] = q;
}
if (pkt->proto == IPPROTO_TCP) { /* update state according to flags */
- u_char flags = pkt->flags & (TH_FIN|TH_SYN|TH_RST);
+ u_char flags = pkt->flags & (TH_FIN | TH_SYN | TH_RST);
- q->state |= (dir == MATCH_FORWARD ) ? flags : (flags << 8);
+ q->state |= (dir == MATCH_FORWARD) ? flags : (flags << 8);
switch (q->state) {
- case TH_SYN: /* opening */
+ case TH_SYN: /* opening */
q->expire = timenow.tv_sec + dyn_syn_lifetime;
break;
- case BOTH_SYN: /* move to established */
- case BOTH_SYN | TH_FIN : /* one side tries to close */
- case BOTH_SYN | (TH_FIN << 8) :
- if (tcp) {
-#define _SEQ_GE(a,b) ((int)(a) - (int)(b) >= 0)
- u_int32_t ack = ntohl(tcp->th_ack);
- if (dir == MATCH_FORWARD) {
- if (q->ack_fwd == 0 || _SEQ_GE(ack, q->ack_fwd))
- q->ack_fwd = ack;
- else { /* ignore out-of-sequence */
- break;
- }
- } else {
- if (q->ack_rev == 0 || _SEQ_GE(ack, q->ack_rev))
- q->ack_rev = ack;
- else { /* ignore out-of-sequence */
- break;
+ case BOTH_SYN: /* move to established */
+ case BOTH_SYN | TH_FIN: /* one side tries to close */
+ case BOTH_SYN | (TH_FIN << 8):
+ if (tcp) {
+#define _SEQ_GE(a, b) ((int)(a) - (int)(b) >= 0)
+ u_int32_t ack = ntohl(tcp->th_ack);
+ if (dir == MATCH_FORWARD) {
+ if (q->ack_fwd == 0 || _SEQ_GE(ack, q->ack_fwd)) {
+ q->ack_fwd = ack;
+ } else { /* ignore out-of-sequence */
+ break;
+ }
+ } else {
+ if (q->ack_rev == 0 || _SEQ_GE(ack, q->ack_rev)) {
+ q->ack_rev = ack;
+ } else { /* ignore out-of-sequence */
+ break;
+ }
}
- }
}
q->expire = timenow.tv_sec + dyn_ack_lifetime;
break;
- case BOTH_SYN | BOTH_FIN: /* both sides closed */
- if (dyn_fin_lifetime >= dyn_keepalive_period)
+ case BOTH_SYN | BOTH_FIN: /* both sides closed */
+ if (dyn_fin_lifetime >= dyn_keepalive_period) {
dyn_fin_lifetime = dyn_keepalive_period - 1;
+ }
q->expire = timenow.tv_sec + dyn_fin_lifetime;
break;
* reset or some invalid combination, but can also
* occur if we use keep-state the wrong way.
*/
- if ( (q->state & ((TH_RST << 8)|TH_RST)) == 0)
+ if ((q->state & ((TH_RST << 8) | TH_RST)) == 0) {
printf("invalid state: 0x%x\n", q->state);
+ }
#endif
- if (dyn_rst_lifetime >= dyn_keepalive_period)
+ if (dyn_rst_lifetime >= dyn_keepalive_period) {
dyn_rst_lifetime = dyn_keepalive_period - 1;
+ }
q->expire = timenow.tv_sec + dyn_rst_lifetime;
break;
}
q->expire = timenow.tv_sec + dyn_short_lifetime;
}
done:
- if (match_direction)
+ if (match_direction) {
*match_direction = dir;
+ }
return q;
}
* default to 1024.
*/
- if (dyn_buckets > 65536)
+ if (dyn_buckets > 65536) {
dyn_buckets = 1024;
- if ((dyn_buckets & (dyn_buckets-1)) != 0) { /* not a power of 2 */
+ }
+ if ((dyn_buckets & (dyn_buckets - 1)) != 0) { /* not a power of 2 */
dyn_buckets = curr_dyn_buckets; /* reset */
return;
}
curr_dyn_buckets = dyn_buckets;
- if (ipfw_dyn_v != NULL)
+ if (ipfw_dyn_v != NULL) {
_FREE(ipfw_dyn_v, M_IPFW);
+ }
for (;;) {
ipfw_dyn_v = _MALLOC(curr_dyn_buckets * sizeof(ipfw_dyn_rule *),
- M_IPFW, M_NOWAIT | M_ZERO);
- if (ipfw_dyn_v != NULL || curr_dyn_buckets <= 2)
+ M_IPFW, M_NOWAIT | M_ZERO);
+ if (ipfw_dyn_v != NULL || curr_dyn_buckets <= 2) {
break;
+ }
curr_dyn_buckets /= 2;
}
}
* - "parent" rules for the above (O_LIMIT_PARENT).
*/
static ipfw_dyn_rule *
-add_dyn_rule(struct ipfw_flow_id *id, u_int8_t dyn_type, struct ip_fw *rule)
+add_dyn_rule(struct ip_flow_id *id, u_int8_t dyn_type, struct ip_fw *rule)
{
ipfw_dyn_rule *r;
int i;
if (ipfw_dyn_v == NULL ||
(dyn_count == 0 && dyn_buckets != curr_dyn_buckets)) {
realloc_dynamic_table();
- if (ipfw_dyn_v == NULL)
+ if (ipfw_dyn_v == NULL) {
return NULL; /* failed ! */
+ }
}
i = hash_packet(id);
r = _MALLOC(sizeof *r, M_IPFW, M_NOWAIT | M_ZERO);
if (r == NULL) {
#if IPFW_DEBUG
- printf ("ipfw: sorry cannot allocate state\n");
+ printf("ipfw: sorry cannot allocate state\n");
#endif
return NULL;
}
/* increase refcount on parent, and set pointer */
if (dyn_type == O_LIMIT) {
ipfw_dyn_rule *parent = (ipfw_dyn_rule *)rule;
- if ( parent->dyn_type != O_LIMIT_PARENT)
+ if (parent->dyn_type != O_LIMIT_PARENT) {
panic("invalid parent");
+ }
parent->count++;
r->parent = parent;
rule = parent->rule;
ipfw_dyn_v[i] = r;
dyn_count++;
DEB(printf("ipfw: add dyn entry ty %d 0x%08x %d -> 0x%08x %d, total %d\n",
- dyn_type,
- (r->id.src_ip), (r->id.src_port),
- (r->id.dst_ip), (r->id.dst_port),
- dyn_count ); )
+ dyn_type,
+ (r->id.src_ip), (r->id.src_port),
+ (r->id.dst_ip), (r->id.dst_port),
+ dyn_count ); )
return r;
}
* If the lookup fails, then install one.
*/
static ipfw_dyn_rule *
-lookup_dyn_parent(struct ipfw_flow_id *pkt, struct ip_fw *rule)
+lookup_dyn_parent(struct ip_flow_id *pkt, struct ip_fw *rule)
{
ipfw_dyn_rule *q;
int i;
if (ipfw_dyn_v) {
i = hash_packet( pkt );
- for (q = ipfw_dyn_v[i] ; q != NULL ; q=q->next)
+ for (q = ipfw_dyn_v[i]; q != NULL; q = q->next) {
if (q->dyn_type == O_LIMIT_PARENT &&
- rule== q->rule &&
+ rule == q->rule &&
pkt->proto == q->id.proto &&
pkt->src_ip == q->id.src_ip &&
pkt->dst_ip == q->id.dst_ip &&
pkt->src_port == q->id.src_port &&
pkt->dst_port == q->id.dst_port) {
q->expire = timenow.tv_sec + dyn_short_lifetime;
- DEB(printf("ipfw: lookup_dyn_parent found 0x%p\n",q);)
+ DEB(printf("ipfw: lookup_dyn_parent found "
+ "0x%llx\n", (uint64_t)VM_KERNEL_ADDRPERM(q)); )
return q;
}
+ }
}
return add_dyn_rule(pkt, O_LIMIT_PARENT, rule);
}
*/
static int
install_state(struct ip_fw *rule, ipfw_insn_limit *cmd,
- struct ip_fw_args *args)
+ struct ip_fw_args *args)
{
static int last_log;
struct timeval timenow;
DEB(printf("ipfw: install state type %d 0x%08x %u -> 0x%08x %u\n",
cmd->o.opcode,
- (args->f_id.src_ip), (args->f_id.src_port),
- (args->f_id.dst_ip), (args->f_id.dst_port) );)
+ (args->fwa_id.src_ip), (args->fwa_id.src_port),
+ (args->fwa_id.dst_ip), (args->fwa_id.dst_port)); )
- q = lookup_dyn_rule(&args->f_id, NULL, NULL);
+ q = lookup_dyn_rule(&args->fwa_id, NULL, NULL);
if (q != NULL) { /* should never occur */
if (last_log != timenow.tv_sec) {
return 0;
}
- if (dyn_count >= dyn_max)
+ if (dyn_count >= dyn_max) {
/*
* Run out of slots, try to remove any expired rule.
*/
remove_dyn_rule(NULL, (ipfw_dyn_rule *)1);
+ }
if (dyn_count >= dyn_max) {
if (last_log != timenow.tv_sec) {
switch (cmd->o.opcode) {
case O_KEEP_STATE: /* bidir rule */
- add_dyn_rule(&args->f_id, O_KEEP_STATE, rule);
+ add_dyn_rule(&args->fwa_id, O_KEEP_STATE, rule);
break;
case O_LIMIT: /* limit number of sessions */
- {
+ {
u_int16_t limit_mask = cmd->limit_mask;
- struct ipfw_flow_id id;
+ struct ip_flow_id id;
ipfw_dyn_rule *parent;
DEB(printf("ipfw: installing dyn-limit rule %d\n",
- cmd->conn_limit);)
+ cmd->conn_limit); )
id.dst_ip = id.src_ip = 0;
id.dst_port = id.src_port = 0;
- id.proto = args->f_id.proto;
-
- if (limit_mask & DYN_SRC_ADDR)
- id.src_ip = args->f_id.src_ip;
- if (limit_mask & DYN_DST_ADDR)
- id.dst_ip = args->f_id.dst_ip;
- if (limit_mask & DYN_SRC_PORT)
- id.src_port = args->f_id.src_port;
- if (limit_mask & DYN_DST_PORT)
- id.dst_port = args->f_id.dst_port;
+ id.proto = args->fwa_id.proto;
+
+ if (limit_mask & DYN_SRC_ADDR) {
+ id.src_ip = args->fwa_id.src_ip;
+ }
+ if (limit_mask & DYN_DST_ADDR) {
+ id.dst_ip = args->fwa_id.dst_ip;
+ }
+ if (limit_mask & DYN_SRC_PORT) {
+ id.src_port = args->fwa_id.src_port;
+ }
+ if (limit_mask & DYN_DST_PORT) {
+ id.dst_port = args->fwa_id.dst_port;
+ }
parent = lookup_dyn_parent(&id, rule);
if (parent == NULL) {
printf("ipfw: add parent failed\n");
return 1;
}
}
- add_dyn_rule(&args->f_id, O_LIMIT, (struct ip_fw *)parent);
- }
- break;
+ add_dyn_rule(&args->fwa_id, O_LIMIT, (struct ip_fw *)parent);
+ }
+ break;
default:
printf("ipfw: unknown dynamic rule type %u\n", cmd->o.opcode);
return 1;
}
- lookup_dyn_rule(&args->f_id, NULL, NULL); /* XXX just set lifetime */
+ lookup_dyn_rule(&args->fwa_id, NULL, NULL); /* XXX just set lifetime */
return 0;
}
/*
- * Transmit a TCP packet, containing either a RST or a keepalive.
+ * Generate a TCP packet, containing either a RST or a keepalive.
* When flags & TH_RST, we are sending a RST packet, because of a
* "reset" action matched the packet.
* Otherwise we are sending a keepalive, and flags & TH_
*/
-static void
-send_pkt(struct ipfw_flow_id *id, u_int32_t seq, u_int32_t ack, int flags)
+static struct mbuf *
+send_pkt(struct ip_flow_id *id, u_int32_t seq, u_int32_t ack, int flags)
{
struct mbuf *m;
struct ip *ip;
struct tcphdr *tcp;
- struct route sro; /* fake route */
- MGETHDR(m, M_DONTWAIT, MT_HEADER);
- if (m == 0)
- return;
+ MGETHDR(m, M_DONTWAIT, MT_HEADER); /* MAC-OK */
+ if (m == 0) {
+ return NULL;
+ }
m->m_pkthdr.rcvif = (struct ifnet *)0;
m->m_pkthdr.len = m->m_len = sizeof(struct ip) + sizeof(struct tcphdr);
m->m_data += max_linkhdr;
ip->ip_dst.s_addr = htonl(id->src_ip);
tcp->th_sport = htons(id->dst_port);
tcp->th_dport = htons(id->src_port);
- if (flags & TH_RST) { /* we are sending a RST */
+ if (flags & TH_RST) { /* we are sending a RST */
if (flags & TH_ACK) {
tcp->th_seq = htonl(ack);
tcp->th_ack = htonl(0);
tcp->th_flags = TH_RST;
} else {
- if (flags & TH_SYN)
+ if (flags & TH_SYN) {
seq++;
+ }
tcp->th_seq = htonl(0);
tcp->th_ack = htonl(seq);
tcp->th_flags = TH_RST | TH_ACK;
*/
ip->ip_ttl = ip_defttl;
ip->ip_len = m->m_pkthdr.len;
- bzero (&sro, sizeof (sro));
- ip_rtaddr(ip->ip_dst, &sro);
m->m_flags |= M_SKIP_FIREWALL;
- ip_output_list(m, 0, NULL, &sro, 0, NULL);
- if (sro.ro_rt)
- RTFREE(sro.ro_rt);
+
+ return m;
}
/*
* sends a reject message, consuming the mbuf passed as an argument.
*/
static void
-send_reject(struct ip_fw_args *args, int code, int offset, int ip_len)
+send_reject(struct ip_fw_args *args, int code, int offset, __unused int ip_len)
{
-
if (code != ICMP_REJECT_RST) { /* Send an ICMP unreach */
/* We need the IP header in host order for icmp_error(). */
- if (args->eh != NULL) {
- struct ip *ip = mtod(args->m, struct ip *);
+ if (args->fwa_eh != NULL) {
+ struct ip *ip = mtod(args->fwa_m, struct ip *);
ip->ip_len = ntohs(ip->ip_len);
ip->ip_off = ntohs(ip->ip_off);
}
- args->m->m_flags |= M_SKIP_FIREWALL;
- icmp_error(args->m, ICMP_UNREACH, code, 0L, 0);
- } else if (offset == 0 && args->f_id.proto == IPPROTO_TCP) {
+ args->fwa_m->m_flags |= M_SKIP_FIREWALL;
+ icmp_error(args->fwa_m, ICMP_UNREACH, code, 0L, 0);
+ } else if (offset == 0 && args->fwa_id.proto == IPPROTO_TCP) {
struct tcphdr *const tcp =
- L3HDR(struct tcphdr, mtod(args->m, struct ip *));
- if ( (tcp->th_flags & TH_RST) == 0) {
- send_pkt(&(args->f_id), ntohl(tcp->th_seq),
- ntohl(tcp->th_ack),
- tcp->th_flags | TH_RST);
- }
- m_freem(args->m);
- } else
- m_freem(args->m);
- args->m = NULL;
+ L3HDR(struct tcphdr, mtod(args->fwa_m, struct ip *));
+ if ((tcp->th_flags & TH_RST) == 0) {
+ struct mbuf *m;
+
+ m = send_pkt(&(args->fwa_id), ntohl(tcp->th_seq),
+ ntohl(tcp->th_ack),
+ tcp->th_flags | TH_RST);
+ if (m != NULL) {
+ struct route sro; /* fake route */
+
+ bzero(&sro, sizeof(sro));
+ ip_output(m, NULL, &sro, 0, NULL, NULL);
+ ROUTE_RELEASE(&sro);
+ }
+ }
+ m_freem(args->fwa_m);
+ } else {
+ m_freem(args->fwa_m);
+ }
+ args->fwa_m = NULL;
}
/**
/* look for action, in case it is a skipto */
cmd = ACTION_PTR(me);
- if (cmd->opcode == O_LOG)
+ if (cmd->opcode == O_LOG) {
cmd += F_LEN(cmd);
- if ( cmd->opcode == O_SKIPTO )
- for (rule = me->next; rule ; rule = rule->next)
- if (rule->rulenum >= cmd->arg1)
+ }
+ if (cmd->opcode == O_SKIPTO) {
+ for (rule = me->next; rule; rule = rule->next) {
+ if (rule->rulenum >= cmd->arg1) {
break;
- if (rule == NULL) /* failure or not a skipto */
+ }
+ }
+ }
+ if (rule == NULL) { /* failure or not a skipto */
rule = me->next;
+ }
me->next_rule = rule;
return rule;
}
*
* Parameters:
*
- * args->m (in/out) The packet; we set to NULL when/if we nuke it.
+ * args->fwa_m (in/out) The packet; we set to NULL when/if we nuke it.
* Starts with the IP header.
- * args->eh (in) Mac header if present, or NULL for layer3 packet.
- * args->oif Outgoing interface, or NULL if packet is incoming.
+ * args->fwa_eh (in) Mac header if present, or NULL for layer3 packet.
+ * args->fwa_oif Outgoing interface, or NULL if packet is incoming.
* The incoming interface is in the mbuf. (in)
- * args->divert_rule (in/out)
+ * args->fwa_divert_rule (in/out)
* Skip up to the first rule past this rule number;
* upon return, non-zero port number for divert or tee.
*
- * args->rule Pointer to the last matching rule (in/out)
- * args->next_hop Socket we are forwarding to (out).
- * args->f_id Addresses grabbed from the packet (out)
+ * args->fwa_ipfw_rule Pointer to the last matching rule (in/out)
+ * args->fwa_next_hop Socket we are forwarding to (out).
+ * args->fwa_id Addresses grabbed from the packet (out)
*
* Return value:
*
* IP_FW_PORT_DENY_FLAG the packet must be dropped.
* 0 The packet is to be accepted and routed normally OR
- * the packet was denied/rejected and has been dropped;
+ * the packet was denied/rejected and has been dropped;
* in the latter case, *m is equal to NULL upon return.
* port Divert the packet to port, with these caveats:
*
* the implementation of the various instructions to make sure
* that they still work.
*
- * args->eh The MAC header. It is non-null for a layer2
+ * args->fwa_eh The MAC header. It is non-null for a layer2
* packet, it is NULL for a layer-3 packet.
*
- * m | args->m Pointer to the mbuf, as received from the caller.
+ * m | args->fwa_m Pointer to the mbuf, as received from the caller.
* It may change if ipfw_chk() does an m_pullup, or if it
* consumes the packet because it calls send_reject().
* XXX This has to change, so that ipfw_chk() never modifies
* in sync with it (the packet is supposed to start with
* the ip header).
*/
- struct mbuf *m = args->m;
+ struct mbuf *m = args->fwa_m;
struct ip *ip = mtod(m, struct ip *);
/*
- * oif | args->oif If NULL, ipfw_chk has been called on the
+ * oif | args->fwa_oif If NULL, ipfw_chk has been called on the
* inbound path (ether_input, bdg_forward, ip_input).
* If non-NULL, ipfw_chk has been called on the outbound path
* (ether_output, ip_output).
*/
- struct ifnet *oif = args->oif;
+ struct ifnet *oif = args->fwa_oif;
- struct ip_fw *f = NULL; /* matching rule */
+ struct ip_fw *f = NULL; /* matching rule */
int retval = 0;
/*
* hlen The length of the IPv4 header.
* hlen >0 means we have an IPv4 packet.
*/
- u_int hlen = 0; /* hlen >0 means we have an IP pkt */
+ u_int hlen = 0; /* hlen >0 means we have an IP pkt */
/*
* offset The offset of a fragment. offset != 0 means that
* Only valid for IPv4 packets.
*/
u_int8_t proto;
- u_int16_t src_port = 0, dst_port = 0; /* NOTE: host format */
- struct in_addr src_ip, dst_ip; /* NOTE: network format */
- u_int16_t ip_len=0;
+ u_int16_t src_port = 0, dst_port = 0; /* NOTE: host format */
+ struct in_addr src_ip = { 0 }, dst_ip = { 0 }; /* NOTE: network format */
+ u_int16_t ip_len = 0;
int pktlen;
int dyn_dir = MATCH_UNKNOWN;
ipfw_dyn_rule *q = NULL;
struct timeval timenow;
- if (m->m_flags & M_SKIP_FIREWALL) {
- return 0; /* accept */
+ if (m->m_flags & M_SKIP_FIREWALL || fw_bypass) {
+ return 0; /* accept */
+ }
+
+ /*
+ * Clear packet chain if we find one here.
+ */
+
+ if (m->m_nextpkt != NULL) {
+ m_freem_list(m->m_nextpkt);
+ m->m_nextpkt = NULL;
}
lck_mtx_lock(ipfw_mutex);
getmicrotime(&timenow);
/*
* dyn_dir = MATCH_UNKNOWN when rules unchecked,
- * MATCH_NONE when checked and not matched (q = NULL),
+ * MATCH_NONE when checked and not matched (q = NULL),
* MATCH_FORWARD or MATCH_REVERSE otherwise (q != NULL)
*/
pktlen = m->m_pkthdr.len;
- if (args->eh == NULL || /* layer 3 packet */
- ( m->m_pkthdr.len >= sizeof(struct ip) &&
- ntohs(args->eh->ether_type) == ETHERTYPE_IP))
- hlen = ip->ip_hl << 2;
+ if (args->fwa_eh == NULL || /* layer 3 packet */
+ (m->m_pkthdr.len >= sizeof(struct ip) &&
+ ntohs(args->fwa_eh->ether_type) == ETHERTYPE_IP)) {
+ hlen = ip->ip_hl << 2;
+ }
/*
* Collect parameters into local variables for faster matching.
*/
- if (hlen == 0) { /* do not grab addresses for non-ip pkts */
- proto = args->f_id.proto = 0; /* mark f_id invalid */
+ if (hlen == 0) { /* do not grab addresses for non-ip pkts */
+ proto = args->fwa_id.proto = 0; /* mark f_id invalid */
goto after_ip_checks;
}
- proto = args->f_id.proto = ip->ip_p;
+ proto = args->fwa_id.proto = ip->ip_p;
src_ip = ip->ip_src;
dst_ip = ip->ip_dst;
- if (args->eh != NULL) { /* layer 2 packets are as on the wire */
+ if (args->fwa_eh != NULL) { /* layer 2 packets are as on the wire */
offset = ntohs(ip->ip_off) & IP_OFFMASK;
ip_len = ntohs(ip->ip_len);
} else {
}
pktlen = ip_len < pktlen ? ip_len : pktlen;
-#define PULLUP_TO(len) \
- do { \
- if ((m)->m_len < (len)) { \
- args->m = m = m_pullup(m, (len)); \
- if (m == 0) \
- goto pullup_failed; \
- ip = mtod(m, struct ip *); \
- } \
- } while (0)
+#define PULLUP_TO(len) \
+ do { \
+ if ((m)->m_len < (len)) { \
+ args->fwa_m = m = m_pullup(m, (len)); \
+ if (m == 0) \
+ goto pullup_failed; \
+ ip = mtod(m, struct ip *); \
+ } \
+ } while (0)
if (offset == 0) {
switch (proto) {
case IPPROTO_TCP:
- {
+ {
struct tcphdr *tcp;
PULLUP_TO(hlen + sizeof(struct tcphdr));
tcp = L3HDR(struct tcphdr, ip);
dst_port = tcp->th_dport;
src_port = tcp->th_sport;
- args->f_id.flags = tcp->th_flags;
- }
- break;
+ args->fwa_id.flags = tcp->th_flags;
+ }
+ break;
case IPPROTO_UDP:
- {
+ {
struct udphdr *udp;
PULLUP_TO(hlen + sizeof(struct udphdr));
udp = L3HDR(struct udphdr, ip);
dst_port = udp->uh_dport;
src_port = udp->uh_sport;
- }
- break;
+ }
+ break;
case IPPROTO_ICMP:
- PULLUP_TO(hlen + 4); /* type, code and checksum. */
- args->f_id.flags = L3HDR(struct icmp, ip)->icmp_type;
+ PULLUP_TO(hlen + 4); /* type, code and checksum. */
+ args->fwa_id.flags = L3HDR(struct icmp, ip)->icmp_type;
break;
default:
#undef PULLUP_TO
}
- args->f_id.src_ip = ntohl(src_ip.s_addr);
- args->f_id.dst_ip = ntohl(dst_ip.s_addr);
- args->f_id.src_port = src_port = ntohs(src_port);
- args->f_id.dst_port = dst_port = ntohs(dst_port);
+ args->fwa_id.src_ip = ntohl(src_ip.s_addr);
+ args->fwa_id.dst_ip = ntohl(dst_ip.s_addr);
+ args->fwa_id.src_port = src_port = ntohs(src_port);
+ args->fwa_id.dst_port = dst_port = ntohs(dst_port);
after_ip_checks:
- if (args->rule) {
+ if (args->fwa_ipfw_rule) {
/*
* Packet has already been tagged. Look for the next rule
* to restart processing.
return 0;
}
- f = args->rule->next_rule;
- if (f == NULL)
- f = lookup_next_rule(args->rule);
+ f = args->fwa_ipfw_rule->next_rule;
+ if (f == NULL) {
+ f = lookup_next_rule(args->fwa_ipfw_rule);
+ }
} else {
/*
* Find the starting rule. It can be either the first
* one, or the one after divert_rule if asked so.
*/
- int skipto = args->divert_rule;
+ int skipto = args->fwa_divert_rule;
f = layer3_chain;
- if (args->eh == NULL && skipto != 0) {
+ if (args->fwa_eh == NULL && skipto != 0) {
if (skipto >= IPFW_DEFAULT_RULE) {
lck_mtx_unlock(ipfw_mutex);
- return(IP_FW_PORT_DENY_FLAG); /* invalid */
+ return IP_FW_PORT_DENY_FLAG; /* invalid */
}
- while (f && f->rulenum <= skipto)
+ while (f && f->rulenum <= skipto) {
f = f->next;
- if (f == NULL) { /* drop packet */
+ }
+ if (f == NULL) { /* drop packet */
lck_mtx_unlock(ipfw_mutex);
- return(IP_FW_PORT_DENY_FLAG);
+ return IP_FW_PORT_DENY_FLAG;
}
}
}
- args->divert_rule = 0; /* reset to avoid confusion later */
+ args->fwa_divert_rule = 0; /* reset to avoid confusion later */
/*
* Now scan the rules, and parse microinstructions for each rule.
if (f->reserved_1 == IPFW_RULE_INACTIVE) {
continue;
}
-
- if (set_disable & (1 << f->set) )
+
+ if (set_disable & (1 << f->set)) {
continue;
+ }
skip_or = 0;
- for (l = f->cmd_len, cmd = f->cmd ; l > 0 ;
+ for (l = f->cmd_len, cmd = f->cmd; l > 0;
l -= cmdlen, cmd += cmdlen) {
int match;
* the following instructions to be skipped until
* past the one with the F_OR bit clear.
*/
- if (skip_or) { /* skip this instruction */
- if ((cmd->len & F_OR) == 0)
- skip_or = 0; /* next one is good */
+ if (skip_or) { /* skip this instruction */
+ if ((cmd->len & F_OR) == 0) {
+ skip_or = 0; /* next one is good */
+ }
continue;
}
match = 0; /* set to 1 if we succeed */
* as this ensures that we have an IPv4
* packet with the ports info.
*/
- if (offset!=0)
- break;
-
- {
- struct inpcbinfo *pi;
- int wildcard;
- struct inpcb *pcb;
-
- if (proto == IPPROTO_TCP) {
- wildcard = 0;
- pi = &tcbinfo;
- } else if (proto == IPPROTO_UDP) {
- wildcard = 1;
- pi = &udbinfo;
- } else
+ if (offset != 0) {
break;
+ }
+
+ {
+ struct inpcbinfo *pi;
+ int wildcard;
+ struct inpcb *pcb;
+
+ if (proto == IPPROTO_TCP) {
+ wildcard = 0;
+ pi = &tcbinfo;
+ } else if (proto == IPPROTO_UDP) {
+ wildcard = 1;
+ pi = &udbinfo;
+ } else {
+ break;
+ }
- pcb = (oif) ?
- in_pcblookup_hash(pi,
+ pcb = (oif) ?
+ in_pcblookup_hash(pi,
dst_ip, htons(dst_port),
src_ip, htons(src_port),
wildcard, oif) :
- in_pcblookup_hash(pi,
+ in_pcblookup_hash(pi,
src_ip, htons(src_port),
dst_ip, htons(dst_port),
wildcard, NULL);
- if (pcb == NULL || pcb->inp_socket == NULL)
- break;
+ if (pcb == NULL || pcb->inp_socket == NULL) {
+ break;
+ }
#if __FreeBSD_version < 500034
-#define socheckuid(a,b) (kauth_cred_getuid((a)->so_cred) != (b))
+#define socheckuid(a, b) (kauth_cred_getuid((a)->so_cred) != (b))
#endif
- if (cmd->opcode == O_UID) {
- match =
+ if (cmd->opcode == O_UID) {
+ match =
#ifdef __APPLE__
- (pcb->inp_socket->so_uid == (uid_t)((ipfw_insn_u32 *)cmd)->d[0]);
+ (kauth_cred_getuid(pcb->inp_socket->so_cred) == (uid_t)((ipfw_insn_u32 *)cmd)->d[0]);
#else
- !socheckuid(pcb->inp_socket,
- (uid_t)((ipfw_insn_u32 *)cmd)->d[0]);
+ !socheckuid(pcb->inp_socket,
+ (uid_t)((ipfw_insn_u32 *)cmd)->d[0]);
#endif
- }
+ }
#ifndef __APPLE__
- else {
- match = 0;
- kauth_cred_ismember_gid(pcb->inp_socket->so_cred,
- (gid_t)((ipfw_insn_u32 *)cmd)->d[0], &match);
- }
+ else {
+ match = 0;
+ kauth_cred_ismember_gid(pcb->inp_socket->so_cred,
+ (gid_t)((ipfw_insn_u32 *)cmd)->d[0], &match);
+ }
#endif
+ /* release reference on pcb */
+ in_pcb_checkstate(pcb, WNT_RELEASE, 0);
}
- break;
+ break;
case O_RECV:
match = iface_match(m->m_pkthdr.rcvif,
break;
case O_MACADDR2:
- if (args->eh != NULL) { /* have MAC header */
+ if (args->fwa_eh != NULL) { /* have MAC header */
u_int32_t *want = (u_int32_t *)
- ((ipfw_insn_mac *)cmd)->addr;
+ ((ipfw_insn_mac *)cmd)->addr;
u_int32_t *mask = (u_int32_t *)
- ((ipfw_insn_mac *)cmd)->mask;
- u_int32_t *hdr = (u_int32_t *)args->eh;
+ ((ipfw_insn_mac *)cmd)->mask;
+ u_int32_t *hdr = (u_int32_t *)args->fwa_eh;
match =
- ( want[0] == (hdr[0] & mask[0]) &&
- want[1] == (hdr[1] & mask[1]) &&
- want[2] == (hdr[2] & mask[2]) );
+ (want[0] == (hdr[0] & mask[0]) &&
+ want[1] == (hdr[1] & mask[1]) &&
+ want[2] == (hdr[2] & mask[2]));
}
break;
case O_MAC_TYPE:
- if (args->eh != NULL) {
+ if (args->fwa_eh != NULL) {
u_int16_t t =
- ntohs(args->eh->ether_type);
+ ntohs(args->fwa_eh->ether_type);
u_int16_t *p =
((ipfw_insn_u16 *)cmd)->ports;
int i;
- for (i = cmdlen - 1; !match && i>0;
- i--, p += 2)
- match = (t>=p[0] && t<=p[1]);
+ for (i = cmdlen - 1; !match && i > 0;
+ i--, p += 2) {
+ match = (t >= p[0] && t <= p[1]);
+ }
}
break;
match = (hlen > 0 && offset != 0);
break;
- case O_IN: /* "out" is "not in" */
+ case O_IN: /* "out" is "not in" */
match = (oif == NULL);
break;
case O_LAYER2:
- match = (args->eh != NULL);
+ match = (args->fwa_eh != NULL);
break;
case O_PROTO:
case O_IP_SRC_MASK:
case O_IP_DST_MASK:
if (hlen > 0) {
- uint32_t a =
- (cmd->opcode == O_IP_DST_MASK) ?
+ uint32_t a =
+ (cmd->opcode == O_IP_DST_MASK) ?
dst_ip.s_addr : src_ip.s_addr;
- uint32_t *p = ((ipfw_insn_u32 *)cmd)->d;
- int i = cmdlen-1;
+ uint32_t *p = ((ipfw_insn_u32 *)cmd)->d;
+ int i = cmdlen - 1;
- for (; !match && i>0; i-= 2, p+= 2)
- match = (p[0] == (a & p[1]));
+ for (; !match && i > 0; i -= 2, p += 2) {
+ match = (p[0] == (a & p[1]));
+ }
}
break;
case O_IP_DST_SET:
case O_IP_SRC_SET:
if (hlen > 0) {
- u_int32_t *d = (u_int32_t *)(cmd+1);
+ u_int32_t *d = (u_int32_t *)(cmd + 1);
u_int32_t addr =
cmd->opcode == O_IP_DST_SET ?
- args->f_id.dst_ip :
- args->f_id.src_ip;
-
- if (addr < d[0])
- break;
- addr -= d[0]; /* subtract base */
- match = (addr < cmd->arg1) &&
- ( d[ 1 + (addr>>5)] &
- (1<<(addr & 0x1f)) );
+ args->fwa_id.dst_ip :
+ args->fwa_id.src_ip;
+
+ if (addr < d[0]) {
+ break;
+ }
+ addr -= d[0]; /* subtract base */
+ match = (addr < cmd->arg1) &&
+ (d[1 + (addr >> 5)] &
+ (1 << (addr & 0x1f)));
}
break;
* to guarantee that we have an IPv4
* packet with port info.
*/
- if ((proto==IPPROTO_UDP || proto==IPPROTO_TCP)
+ if ((proto == IPPROTO_UDP || proto == IPPROTO_TCP)
&& offset == 0) {
u_int16_t x =
(cmd->opcode == O_IP_SRCPORT) ?
- src_port : dst_port ;
+ src_port : dst_port;
u_int16_t *p =
((ipfw_insn_u16 *)cmd)->ports;
int i;
- for (i = cmdlen - 1; !match && i>0;
- i--, p += 2)
- match = (x>=p[0] && x<=p[1]);
+ for (i = cmdlen - 1; !match && i > 0;
+ i--, p += 2) {
+ match = (x >= p[0] && x <= p[1]);
+ }
}
break;
case O_ICMPTYPE:
- match = (offset == 0 && proto==IPPROTO_ICMP &&
- icmptype_match(ip, (ipfw_insn_u32 *)cmd) );
+ match = (offset == 0 && proto == IPPROTO_ICMP &&
+ icmptype_match(ip, (ipfw_insn_u32 *)cmd));
break;
case O_IPOPT:
- match = (hlen > 0 && ipopts_match(ip, cmd) );
+ match = (hlen > 0 && ipopts_match(ip, cmd));
break;
case O_IPVER:
case O_IPID:
case O_IPLEN:
case O_IPTTL:
- if (hlen > 0) { /* only for IP packets */
- uint16_t x;
- uint16_t *p;
- int i;
-
- if (cmd->opcode == O_IPLEN)
- x = ip_len;
- else if (cmd->opcode == O_IPTTL)
- x = ip->ip_ttl;
- else /* must be IPID */
- x = ntohs(ip->ip_id);
- if (cmdlen == 1) {
- match = (cmd->arg1 == x);
- break;
- }
- /* otherwise we have ranges */
- p = ((ipfw_insn_u16 *)cmd)->ports;
- i = cmdlen - 1;
- for (; !match && i>0; i--, p += 2)
- match = (x >= p[0] && x <= p[1]);
+ if (hlen > 0) { /* only for IP packets */
+ uint16_t x;
+ uint16_t *p;
+ int i;
+
+ if (cmd->opcode == O_IPLEN) {
+ x = ip_len;
+ } else if (cmd->opcode == O_IPTTL) {
+ x = ip->ip_ttl;
+ } else { /* must be IPID */
+ x = ntohs(ip->ip_id);
+ }
+ if (cmdlen == 1) {
+ match = (cmd->arg1 == x);
+ break;
+ }
+ /* otherwise we have ranges */
+ p = ((ipfw_insn_u16 *)cmd)->ports;
+ i = cmdlen - 1;
+ for (; !match && i > 0; i--, p += 2) {
+ match = (x >= p[0] && x <= p[1]);
+ }
}
break;
case O_IPPRECEDENCE:
match = (hlen > 0 &&
- (cmd->arg1 == (ip->ip_tos & 0xe0)) );
+ (cmd->arg1 == (ip->ip_tos & 0xe0)));
break;
case O_IPTOS:
case O_TCPFLAGS:
match = (proto == IPPROTO_TCP && offset == 0 &&
flags_match(cmd,
- L3HDR(struct tcphdr,ip)->th_flags));
+ L3HDR(struct tcphdr, ip)->th_flags));
break;
case O_TCPOPTS:
case O_TCPSEQ:
match = (proto == IPPROTO_TCP && offset == 0 &&
((ipfw_insn_u32 *)cmd)->d[0] ==
- L3HDR(struct tcphdr,ip)->th_seq);
+ L3HDR(struct tcphdr, ip)->th_seq);
break;
case O_TCPACK:
match = (proto == IPPROTO_TCP && offset == 0 &&
((ipfw_insn_u32 *)cmd)->d[0] ==
- L3HDR(struct tcphdr,ip)->th_ack);
+ L3HDR(struct tcphdr, ip)->th_ack);
break;
case O_TCPWIN:
match = (proto == IPPROTO_TCP && offset == 0 &&
cmd->arg1 ==
- L3HDR(struct tcphdr,ip)->th_win);
+ L3HDR(struct tcphdr, ip)->th_win);
break;
case O_ESTAB:
/* reject packets which have SYN only */
/* XXX should i also check for TH_ACK ? */
match = (proto == IPPROTO_TCP && offset == 0 &&
- (L3HDR(struct tcphdr,ip)->th_flags &
- (TH_RST | TH_ACK | TH_SYN)) != TH_SYN);
+ (L3HDR(struct tcphdr, ip)->th_flags &
+ (TH_RST | TH_ACK | TH_SYN)) != TH_SYN);
break;
case O_LOG:
- if (fw_verbose)
- ipfw_log(f, hlen, args->eh, m, oif);
+ if (fw_verbose) {
+ ipfw_log(f, hlen, args->fwa_eh, m, oif);
+ }
match = 1;
break;
case O_PROB:
- match = (random()<((ipfw_insn_u32 *)cmd)->d[0]);
+ match = (random() < ((ipfw_insn_u32 *)cmd)->d[0]);
break;
case O_VERREVPATH:
* to be run first).
*/
if (dyn_dir == MATCH_UNKNOWN &&
- (q = lookup_dyn_rule(&args->f_id,
- &dyn_dir, proto == IPPROTO_TCP ?
- L3HDR(struct tcphdr, ip) : NULL))
- != NULL) {
+ (q = lookup_dyn_rule(&args->fwa_id,
+ &dyn_dir, proto == IPPROTO_TCP ?
+ L3HDR(struct tcphdr, ip) : NULL))
+ != NULL) {
/*
* Found dynamic entry, update stats
* and jump to the 'action' part of
* skip to next rule, if PROBE_STATE just
* ignore and continue with next opcode.
*/
- if (cmd->opcode == O_CHECK_STATE)
+ if (cmd->opcode == O_CHECK_STATE) {
goto next_rule;
+ }
match = 1;
break;
case O_ACCEPT:
- retval = 0; /* accept */
+ retval = 0; /* accept */
goto done;
case O_PIPE:
case O_QUEUE:
- args->rule = f; /* report matching rule */
+ args->fwa_ipfw_rule = f; /* report matching rule */
retval = cmd->arg1 | IP_FW_PORT_DYNT_FLAG;
goto done;
case O_DIVERT:
case O_TEE:
- if (args->eh) /* not on layer 2 */
+ if (args->fwa_eh) { /* not on layer 2 */
break;
- args->divert_rule = f->rulenum;
+ }
+ args->fwa_divert_rule = f->rulenum;
retval = (cmd->opcode == O_DIVERT) ?
cmd->arg1 :
cmd->arg1 | IP_FW_PORT_TEE_FLAG;
case O_COUNT:
case O_SKIPTO:
- f->pcnt++; /* update stats */
+ f->pcnt++; /* update stats */
f->bcnt += pktlen;
f->timestamp = timenow.tv_sec;
- if (cmd->opcode == O_COUNT)
+ if (cmd->opcode == O_COUNT) {
goto next_rule;
+ }
/* handle skipto */
- if (f->next_rule == NULL)
+ if (f->next_rule == NULL) {
lookup_next_rule(f);
+ }
f = f->next_rule;
goto again;
* if the packet is not ICMP (or is an ICMP
* query), and it is not multicast/broadcast.
*/
- if (hlen > 0 &&
+ if (hlen > 0 && offset == 0 &&
(proto != IPPROTO_ICMP ||
- is_icmp_query(ip)) &&
- !(m->m_flags & (M_BCAST|M_MCAST)) &&
+ is_icmp_query(ip)) &&
+ !(m->m_flags & (M_BCAST | M_MCAST)) &&
!IN_MULTICAST(dst_ip.s_addr)) {
send_reject(args, cmd->arg1,
- offset,ip_len);
- m = args->m;
+ offset, ip_len);
+ m = args->fwa_m;
}
- /* FALLTHROUGH */
+ /* FALLTHROUGH */
case O_DENY:
retval = IP_FW_PORT_DENY_FLAG;
goto done;
case O_FORWARD_IP:
- if (args->eh) /* not valid on layer2 pkts */
+ if (args->fwa_eh) { /* not valid on layer2 pkts */
break;
- if (!q || dyn_dir == MATCH_FORWARD)
- args->next_hop =
+ }
+ if (!q || dyn_dir == MATCH_FORWARD) {
+ args->fwa_next_hop =
&((ipfw_insn_sa *)cmd)->sa;
+ }
retval = 0;
goto done;
panic("-- unknown opcode %d\n", cmd->opcode);
} /* end of switch() on opcodes */
- if (cmd->len & F_NOT)
+ if (cmd->len & F_NOT) {
match = !match;
+ }
if (match) {
- if (cmd->len & F_OR)
+ if (cmd->len & F_OR) {
skip_or = 1;
+ }
} else {
- if (!(cmd->len & F_OR)) /* not an OR block, */
- break; /* try next rule */
- }
-
- } /* end of inner for, scan opcodes */
-
-next_rule:; /* try next rule */
+ if (!(cmd->len & F_OR)) { /* not an OR block, */
+ break; /* try next rule */
+ }
+ }
+ } /* end of inner for, scan opcodes */
- } /* end of outer for, scan rules */
+next_rule: ; /* try next rule */
+ } /* end of outer for, scan rules */
printf("ipfw: ouch!, skip past end of rules, denying packet\n");
lck_mtx_unlock(ipfw_mutex);
- return(IP_FW_PORT_DENY_FLAG);
+ return IP_FW_PORT_DENY_FLAG;
done:
/* Update statistics */
return retval;
pullup_failed:
- if (fw_verbose)
+ if (fw_verbose) {
printf("ipfw: pullup failed\n");
+ }
lck_mtx_unlock(ipfw_mutex);
- return(IP_FW_PORT_DENY_FLAG);
+ return IP_FW_PORT_DENY_FLAG;
}
/*
{
struct ip_fw *rule;
- for (rule = layer3_chain; rule; rule = rule->next)
+ for (rule = layer3_chain; rule; rule = rule->next) {
rule->next_rule = NULL;
+ }
}
/*
for (rule = layer3_chain; rule; rule = rule->next) {
ipfw_insn_pipe *cmd = (ipfw_insn_pipe *)ACTION_PTR(rule);
- if (cmd->o.opcode != O_PIPE && cmd->o.opcode != O_QUEUE)
+ if (cmd->o.opcode != O_PIPE && cmd->o.opcode != O_QUEUE) {
continue;
+ }
/*
* XXX Use bcmp/bzero to handle pipe_ptr to overcome
* possible alignment problems on 64-bit architectures.
* much about efficiency.
*/
if (match == NULL ||
- !bcmp(&cmd->pipe_ptr, &match, sizeof(match)) )
+ !bcmp(&cmd->pipe_ptr, &match, sizeof(match))) {
bzero(&cmd->pipe_ptr, sizeof(cmd->pipe_ptr));
+ }
}
}
add_rule(struct ip_fw **head, struct ip_fw *input_rule)
{
struct ip_fw *rule, *f, *prev;
- int s;
int l = RULESIZE(input_rule);
- if (*head == NULL && input_rule->rulenum != IPFW_DEFAULT_RULE)
- return (EINVAL);
+ if (*head == NULL && input_rule->rulenum != IPFW_DEFAULT_RULE) {
+ return EINVAL;
+ }
- rule = _MALLOC(l, M_IPFW, M_WAIT);
+ rule = _MALLOC(l, M_IPFW, M_WAIT | M_ZERO);
if (rule == NULL) {
printf("ipfw2: add_rule MALLOC failed\n");
- return (ENOSPC);
+ return ENOSPC;
}
-
- bzero(rule, l);
+
bcopy(input_rule, rule, l);
rule->next = NULL;
rule->bcnt = 0;
rule->timestamp = 0;
- if (*head == NULL) { /* default rule */
+ if (*head == NULL) { /* default rule */
*head = rule;
goto done;
- }
+ }
/*
* If rulenum is 0, find highest numbered rule before the
* default rule, and add autoinc_step
*/
- if (autoinc_step < 1)
+ if (autoinc_step < 1) {
autoinc_step = 1;
- else if (autoinc_step > 1000)
+ } else if (autoinc_step > 1000) {
autoinc_step = 1000;
+ }
if (rule->rulenum == 0) {
/*
* locate the highest numbered rule before default
*/
for (f = *head; f; f = f->next) {
- if (f->rulenum == IPFW_DEFAULT_RULE)
+ if (f->rulenum == IPFW_DEFAULT_RULE) {
break;
+ }
rule->rulenum = f->rulenum;
}
- if (rule->rulenum < IPFW_DEFAULT_RULE - autoinc_step)
+ if (rule->rulenum < IPFW_DEFAULT_RULE - autoinc_step) {
rule->rulenum += autoinc_step;
+ }
input_rule->rulenum = rule->rulenum;
}
done:
static_count++;
static_len += l;
+ static_len_32 += RULESIZE32(input_rule);
+ static_len_64 += RULESIZE64(input_rule);
DEB(printf("ipfw: installed rule %d, static count now %d\n",
- rule->rulenum, static_count);)
- return (0);
+ rule->rulenum, static_count); )
+ return 0;
}
/**
n = rule->next;
remove_dyn_rule(rule, NULL /* force removal */);
- if (prev == NULL)
+ if (prev == NULL) {
*head = n;
- else
+ } else {
prev->next = n;
+ }
static_count--;
static_len -= l;
+ static_len_32 -= RULESIZE32(rule);
+ static_len_64 -= RULESIZE64(rule);
#if DUMMYNET
- if (DUMMYNET_LOADED)
- ip_dn_ruledel_ptr(rule);
+ if (DUMMYNET_LOADED) {
+ dn_ipfw_rule_delete(rule);
+ }
#endif /* DUMMYNET */
_FREE(rule, M_IPFW);
return n;
print_chain(struct ip_fw **chain)
{
struct ip_fw *rule = *chain;
-
+
for (; rule; rule = rule->next) {
- ipfw_insn *cmd = ACTION_PTR(rule);
-
+ ipfw_insn *cmd = ACTION_PTR(rule);
+
printf("ipfw: rule->rulenum = %d\n", rule->rulenum);
-
+
if (rule->reserved_1 == IPFW_RULE_INACTIVE) {
printf("ipfw: rule->reserved = IPFW_RULE_INACTIVE\n");
}
-
+
switch (cmd->opcode) {
- case O_DENY:
- printf("ipfw: ACTION: Deny\n");
- break;
-
- case O_REJECT:
- if (cmd->arg1==ICMP_REJECT_RST)
- printf("ipfw: ACTION: Reset\n");
- else if (cmd->arg1==ICMP_UNREACH_HOST)
- printf("ipfw: ACTION: Reject\n");
- break;
-
- case O_ACCEPT:
- printf("ipfw: ACTION: Accept\n");
- break;
- case O_COUNT:
- printf("ipfw: ACTION: Count\n");
- break;
- case O_DIVERT:
- printf("ipfw: ACTION: Divert\n");
- break;
- case O_TEE:
- printf("ipfw: ACTION: Tee\n");
- break;
- case O_SKIPTO:
- printf("ipfw: ACTION: SkipTo\n");
- break;
- case O_PIPE:
- printf("ipfw: ACTION: Pipe\n");
- break;
- case O_QUEUE:
- printf("ipfw: ACTION: Queue\n");
- break;
- case O_FORWARD_IP:
- printf("ipfw: ACTION: Forward\n");
- break;
- default:
- printf("ipfw: invalid action! %d\n", cmd->opcode);
+ case O_DENY:
+ printf("ipfw: ACTION: Deny\n");
+ break;
+
+ case O_REJECT:
+ if (cmd->arg1 == ICMP_REJECT_RST) {
+ printf("ipfw: ACTION: Reset\n");
+ } else if (cmd->arg1 == ICMP_UNREACH_HOST) {
+ printf("ipfw: ACTION: Reject\n");
+ }
+ break;
+
+ case O_ACCEPT:
+ printf("ipfw: ACTION: Accept\n");
+ break;
+ case O_COUNT:
+ printf("ipfw: ACTION: Count\n");
+ break;
+ case O_DIVERT:
+ printf("ipfw: ACTION: Divert\n");
+ break;
+ case O_TEE:
+ printf("ipfw: ACTION: Tee\n");
+ break;
+ case O_SKIPTO:
+ printf("ipfw: ACTION: SkipTo\n");
+ break;
+ case O_PIPE:
+ printf("ipfw: ACTION: Pipe\n");
+ break;
+ case O_QUEUE:
+ printf("ipfw: ACTION: Queue\n");
+ break;
+ case O_FORWARD_IP:
+ printf("ipfw: ACTION: Forward\n");
+ break;
+ default:
+ printf("ipfw: invalid action! %d\n", cmd->opcode);
}
}
}
{
struct ip_fw *inactive_rule = (struct ip_fw *)param;
struct ip_fw *rule, *prev;
-
+
lck_mtx_lock(ipfw_mutex);
-
- for (rule = layer3_chain, prev = NULL; rule; ) {
+
+ for (rule = layer3_chain, prev = NULL; rule;) {
if (rule == inactive_rule && rule->reserved_1 == IPFW_RULE_INACTIVE) {
struct ip_fw *n = rule;
-
+
if (prev == NULL) {
layer3_chain = rule->next;
- }
- else {
+ } else {
prev->next = rule->next;
}
rule = rule->next;
_FREE(n, M_IPFW);
- }
- else {
+ } else {
prev = rule;
rule = rule->next;
}
}
-
+
#if DEBUG_INACTIVE_RULES
print_chain(&layer3_chain);
#endif
static void
mark_inactive(struct ip_fw **prev, struct ip_fw **rule)
{
- int l = RULESIZE(*rule);
+ int l = RULESIZE(*rule);
if ((*rule)->reserved_1 != IPFW_RULE_INACTIVE) {
(*rule)->reserved_1 = IPFW_RULE_INACTIVE;
static_count--;
static_len -= l;
-
- timeout(flush_inactive, *rule, 30*hz); /* 30 sec. */
+ static_len_32 -= RULESIZE32(*rule);
+ static_len_64 -= RULESIZE64(*rule);
+
+ timeout(flush_inactive, *rule, 30 * hz); /* 30 sec. */
}
-
+
*prev = *rule;
*rule = (*rule)->next;
}
struct ip_fw *prev, *rule;
flush_rule_ptrs(); /* more efficient to do outside the loop */
- for (prev = NULL, rule = *chain; rule ; )
+ for (prev = NULL, rule = *chain; rule;) {
if (kill_default || rule->set != RESVD_SET) {
- ipfw_insn *cmd = ACTION_PTR(rule);
-
- /* skip over forwarding rules so struct isn't
+ ipfw_insn *cmd = ACTION_PTR(rule);
+
+ /* skip over forwarding rules so struct isn't
* deleted while pointer is still in use elsewhere
*/
if (cmd->opcode == O_FORWARD_IP) {
mark_inactive(&prev, &rule);
- }
- else {
+ } else {
rule = delete_rule(chain, prev, rule);
}
- }
- else {
+ } else {
prev = rule;
rule = rule->next;
}
+ }
}
/**
del_entry(struct ip_fw **chain, u_int32_t arg)
{
struct ip_fw *prev = NULL, *rule = *chain;
- int s;
- u_int16_t rulenum; /* rule or old_set */
+ u_int16_t rulenum; /* rule or old_set */
u_int8_t cmd, new_set;
rulenum = arg & 0xffff;
cmd = (arg >> 24) & 0xff;
new_set = (arg >> 16) & 0xff;
- if (cmd > 4)
+ if (cmd > 4) {
return EINVAL;
- if (new_set > RESVD_SET)
+ }
+ if (new_set > RESVD_SET) {
return EINVAL;
+ }
if (cmd == 0 || cmd == 2) {
- if (rulenum >= IPFW_DEFAULT_RULE)
+ if (rulenum >= IPFW_DEFAULT_RULE) {
return EINVAL;
+ }
} else {
- if (rulenum > RESVD_SET) /* old_set */
+ if (rulenum > RESVD_SET) { /* old_set */
return EINVAL;
+ }
}
switch (cmd) {
- case 0: /* delete rules with given number */
+ case 0: /* delete rules with given number */
/*
* locate first rule to delete
*/
- for (; rule->rulenum < rulenum; prev = rule, rule = rule->next)
+ for (; rule->rulenum < rulenum; prev = rule, rule = rule->next) {
;
- if (rule->rulenum != rulenum)
+ }
+ if (rule->rulenum != rulenum) {
return EINVAL;
+ }
/*
* flush pointers outside the loop, then delete all matching
*/
flush_rule_ptrs();
while (rule->rulenum == rulenum) {
- ipfw_insn *cmd = ACTION_PTR(rule);
-
- /* keep forwarding rules around so struct isn't
+ ipfw_insn *insn = ACTION_PTR(rule);
+
+ /* keep forwarding rules around so struct isn't
* deleted while pointer is still in use elsewhere
*/
- if (cmd->opcode == O_FORWARD_IP) {
+ if (insn->opcode == O_FORWARD_IP) {
mark_inactive(&prev, &rule);
- }
- else {
+ } else {
rule = delete_rule(chain, prev, rule);
}
}
break;
- case 1: /* delete all rules with given set number */
+ case 1: /* delete all rules with given set number */
flush_rule_ptrs();
while (rule->rulenum < IPFW_DEFAULT_RULE) {
if (rule->set == rulenum) {
- ipfw_insn *cmd = ACTION_PTR(rule);
-
- /* keep forwarding rules around so struct isn't
+ ipfw_insn *insn = ACTION_PTR(rule);
+
+ /* keep forwarding rules around so struct isn't
* deleted while pointer is still in use elsewhere
*/
- if (cmd->opcode == O_FORWARD_IP) {
+ if (insn->opcode == O_FORWARD_IP) {
mark_inactive(&prev, &rule);
- }
- else {
+ } else {
rule = delete_rule(chain, prev, rule);
}
- }
- else {
+ } else {
prev = rule;
rule = rule->next;
}
}
break;
- case 2: /* move rules with given number to new set */
- for (; rule->rulenum < IPFW_DEFAULT_RULE; rule = rule->next)
- if (rule->rulenum == rulenum)
+ case 2: /* move rules with given number to new set */
+ for (; rule->rulenum < IPFW_DEFAULT_RULE; rule = rule->next) {
+ if (rule->rulenum == rulenum) {
rule->set = new_set;
+ }
+ }
break;
case 3: /* move rules with given set number to new set */
- for (; rule->rulenum < IPFW_DEFAULT_RULE; rule = rule->next)
- if (rule->set == rulenum)
+ for (; rule->rulenum < IPFW_DEFAULT_RULE; rule = rule->next) {
+ if (rule->set == rulenum) {
rule->set = new_set;
+ }
+ }
break;
case 4: /* swap two sets */
- for (; rule->rulenum < IPFW_DEFAULT_RULE; rule = rule->next)
- if (rule->set == rulenum)
+ for (; rule->rulenum < IPFW_DEFAULT_RULE; rule = rule->next) {
+ if (rule->set == rulenum) {
rule->set = new_set;
- else if (rule->set == new_set)
+ } else if (rule->set == new_set) {
rule->set = rulenum;
+ }
+ }
break;
}
return 0;
rule->bcnt = rule->pcnt = 0;
rule->timestamp = 0;
}
- if (l->o.opcode == O_LOG)
+ if (l->o.opcode == O_LOG) {
l->log_left = l->max_log;
+ }
}
/**
zero_entry(int rulenum, int log_only)
{
struct ip_fw *rule;
- int s;
- char *msg;
+ const char *msg;
if (rulenum == 0) {
norule_counter = 0;
- for (rule = layer3_chain; rule; rule = rule->next)
+ for (rule = layer3_chain; rule; rule = rule->next) {
clear_counters(rule, log_only);
+ }
msg = log_only ? "ipfw: All logging counts reset.\n" :
- "ipfw: Accounting cleared.\n";
+ "ipfw: Accounting cleared.\n";
} else {
int cleared = 0;
/*
* We can have multiple rules with the same number, so we
* need to clear them all.
*/
- for (rule = layer3_chain; rule; rule = rule->next)
+ for (rule = layer3_chain; rule; rule = rule->next) {
if (rule->rulenum == rulenum) {
while (rule && rule->rulenum == rulenum) {
clear_counters(rule, log_only);
cleared = 1;
break;
}
- if (!cleared) /* we did not find any matching rules */
- return (EINVAL);
+ }
+ if (!cleared) { /* we did not find any matching rules */
+ return EINVAL;
+ }
msg = log_only ? "ipfw: Entry %d logging count reset.\n" :
- "ipfw: Entry %d cleared.\n";
+ "ipfw: Entry %d cleared.\n";
}
- if (fw_verbose)
- {
+ if (fw_verbose) {
dolog((LOG_AUTHPRIV | LOG_NOTICE, msg, rulenum));
}
- return (0);
+ return 0;
}
/*
check_ipfw_struct(struct ip_fw *rule, int size)
{
int l, cmdlen = 0;
- int have_action=0;
+ int have_action = 0;
ipfw_insn *cmd;
if (size < sizeof(*rule)) {
printf("ipfw: rule too short\n");
- return (EINVAL);
+ return EINVAL;
}
/* first, check for valid size */
l = RULESIZE(rule);
if (l != size) {
printf("ipfw: size mismatch (have %d want %d)\n", size, l);
- return (EINVAL);
+ return EINVAL;
}
/*
* Now go for the individual checks. Very simple ones, basically only
* instruction sizes.
*/
- for (l = rule->cmd_len, cmd = rule->cmd ;
- l > 0 ; l -= cmdlen, cmd += cmdlen) {
+ for (l = rule->cmd_len, cmd = rule->cmd;
+ l > 0; l -= cmdlen, cmd += cmdlen) {
cmdlen = F_LEN(cmd);
if (cmdlen > l) {
printf("ipfw: opcode %d size truncated\n",
cmd->opcode);
return EINVAL;
}
- DEB(printf("ipfw: opcode %d\n", cmd->opcode);)
+ DEB(printf("ipfw: opcode %d\n", cmd->opcode); )
switch (cmd->opcode) {
case O_PROBE_STATE:
case O_KEEP_STATE:
case O_ESTAB:
case O_VERREVPATH:
case O_IPSEC:
- if (cmdlen != F_INSN_SIZE(ipfw_insn))
+ if (cmdlen != F_INSN_SIZE(ipfw_insn)) {
goto bad_size;
+ }
break;
case O_UID:
#ifndef __APPLE__
case O_TCPACK:
case O_PROB:
case O_ICMPTYPE:
- if (cmdlen != F_INSN_SIZE(ipfw_insn_u32))
+ if (cmdlen != F_INSN_SIZE(ipfw_insn_u32)) {
goto bad_size;
+ }
break;
case O_LIMIT:
- if (cmdlen != F_INSN_SIZE(ipfw_insn_limit))
+ if (cmdlen != F_INSN_SIZE(ipfw_insn_limit)) {
goto bad_size;
+ }
break;
case O_LOG:
- if (cmdlen != F_INSN_SIZE(ipfw_insn_log))
+ if (cmdlen != F_INSN_SIZE(ipfw_insn_log)) {
goto bad_size;
-
+ }
+
/* enforce logging limit */
if (fw_verbose &&
- ((ipfw_insn_log *)cmd)->max_log == 0 && verbose_limit != 0) {
+ ((ipfw_insn_log *)cmd)->max_log == 0 && verbose_limit != 0) {
((ipfw_insn_log *)cmd)->max_log = verbose_limit;
}
case O_IP_SRC_MASK:
case O_IP_DST_MASK:
/* only odd command lengths */
- if ( !(cmdlen & 1) || cmdlen > 31)
+ if (!(cmdlen & 1) || cmdlen > 31) {
goto bad_size;
+ }
break;
case O_IP_SRC_SET:
case O_IP_DST_SET:
if (cmd->arg1 == 0 || cmd->arg1 > 256) {
printf("ipfw: invalid set size %d\n",
- cmd->arg1);
+ cmd->arg1);
return EINVAL;
}
if (cmdlen != F_INSN_SIZE(ipfw_insn_u32) +
- (cmd->arg1+31)/32 )
+ (cmd->arg1 + 31) / 32) {
goto bad_size;
+ }
break;
case O_MACADDR2:
- if (cmdlen != F_INSN_SIZE(ipfw_insn_mac))
+ if (cmdlen != F_INSN_SIZE(ipfw_insn_mac)) {
goto bad_size;
+ }
break;
case O_NOP:
case O_IPID:
case O_IPTTL:
case O_IPLEN:
- if (cmdlen < 1 || cmdlen > 31)
+ if (cmdlen < 1 || cmdlen > 31) {
goto bad_size;
+ }
break;
case O_MAC_TYPE:
case O_IP_SRCPORT:
case O_IP_DSTPORT: /* XXX artificial limit, 30 port pairs */
- if (cmdlen < 2 || cmdlen > 31)
+ if (cmdlen < 2 || cmdlen > 31) {
goto bad_size;
+ }
break;
case O_RECV:
case O_XMIT:
case O_VIA:
- if (cmdlen != F_INSN_SIZE(ipfw_insn_if))
+ if (cmdlen != F_INSN_SIZE(ipfw_insn_if)) {
goto bad_size;
+ }
break;
case O_PIPE:
case O_QUEUE:
- if (cmdlen != F_INSN_SIZE(ipfw_insn_pipe))
+ if (cmdlen != F_INSN_SIZE(ipfw_insn_pipe)) {
goto bad_size;
+ }
goto check_action;
case O_FORWARD_IP:
- if (cmdlen != F_INSN_SIZE(ipfw_insn_sa))
+ if (cmdlen != F_INSN_SIZE(ipfw_insn_sa)) {
goto bad_size;
+ }
goto check_action;
case O_FORWARD_MAC: /* XXX not implemented yet */
case O_SKIPTO:
case O_DIVERT:
case O_TEE:
- if (cmdlen != F_INSN_SIZE(ipfw_insn))
+ if (cmdlen != F_INSN_SIZE(ipfw_insn)) {
goto bad_size;
+ }
check_action:
if (have_action) {
printf("ipfw: opcode %d, multiple actions"
- " not allowed\n",
- cmd->opcode);
+ " not allowed\n",
+ cmd->opcode);
return EINVAL;
}
have_action = 1;
if (l != cmdlen) {
printf("ipfw: opcode %d, action must be"
- " last opcode\n",
- cmd->opcode);
+ " last opcode\n",
+ cmd->opcode);
return EINVAL;
}
break;
default:
printf("ipfw: opcode %d, unknown opcode\n",
- cmd->opcode);
+ cmd->opcode);
return EINVAL;
}
}
bad_size:
printf("ipfw: opcode %d size %d wrong\n",
- cmd->opcode, cmdlen);
+ cmd->opcode, cmdlen);
return EINVAL;
}
+static void
+ipfw_kev_post_msg(u_int32_t event_code)
+{
+ struct kev_msg ev_msg;
+
+ bzero(&ev_msg, sizeof(struct kev_msg));
+
+ ev_msg.vendor_code = KEV_VENDOR_APPLE;
+ ev_msg.kev_class = KEV_FIREWALL_CLASS;
+ ev_msg.kev_subclass = KEV_IPFW_SUBCLASS;
+ ev_msg.event_code = event_code;
+
+ kev_post_msg(&ev_msg);
+}
+
/**
* {set|get}sockopt parser.
*/
static int
ipfw_ctl(struct sockopt *sopt)
{
-#define RULE_MAXSIZE (256*sizeof(u_int32_t))
+#define RULE_MAXSIZE (256*sizeof(u_int32_t))
u_int32_t api_version;
int command;
- int error, s;
+ int error;
size_t size;
- struct ip_fw *bp , *buf, *rule;
-
+ size_t rulesize = RULE_MAXSIZE;
+ struct ip_fw *bp, *buf, *rule;
+ int is64user = 0;
+
/* copy of orig sopt to send to ipfw_get_command_and_version() */
- struct sockopt tmp_sopt = *sopt;
+ struct sockopt tmp_sopt = *sopt;
struct timeval timenow;
getmicrotime(&timenow);
-
+
/*
* Disallow modifications in really-really secure mode, but still allow
* the logging counters to be reset.
(sopt->sopt_dir == SOPT_SET && sopt->sopt_name != IP_FW_RESETLOG)) {
#if __FreeBSD_version >= 500034
error = securelevel_ge(sopt->sopt_td->td_ucred, 3);
- if (error)
- return (error);
+ if (error) {
+ return error;
+ }
#else /* FreeBSD 4.x */
- if (securelevel >= 3)
- return (EPERM);
+ if (securelevel >= 3) {
+ return EPERM;
+ }
#endif
}
/* first get the command and version, then do conversion as necessary */
error = ipfw_get_command_and_version(&tmp_sopt, &command, &api_version);
-
if (error) {
/* error getting the version */
return error;
}
-
+
+ if (proc_is64bit(sopt->sopt_p)) {
+ is64user = 1;
+ }
+
switch (command) {
case IP_FW_GET:
+ {
+ size_t dynrulesize;
/*
* pass up a copy of the current rules. Static rules
* come first (the last of which has number IPFW_DEFAULT_RULE),
* The last dynamic rule has NULL in the "next" field.
*/
lck_mtx_lock(ipfw_mutex);
- size = static_len; /* size of static rules */
- if (ipfw_dyn_v) /* add size of dyn.rules */
- size += (dyn_count * sizeof(ipfw_dyn_rule));
+
+ if (is64user) {
+ size = Get64static_len();
+ dynrulesize = sizeof(ipfw_dyn_rule_64);
+ if (ipfw_dyn_v) {
+ size += (dyn_count * dynrulesize);
+ }
+ } else {
+ size = Get32static_len();
+ dynrulesize = sizeof(ipfw_dyn_rule_32);
+ if (ipfw_dyn_v) {
+ size += (dyn_count * dynrulesize);
+ }
+ }
/*
* XXX todo: if the user passes a short length just to know
* how much room is needed, do not bother filling up the
* buffer, just jump to the sooptcopyout.
*/
- buf = _MALLOC(size, M_TEMP, M_WAITOK);
+ buf = _MALLOC(size, M_TEMP, M_WAITOK | M_ZERO);
if (buf == 0) {
lck_mtx_unlock(ipfw_mutex);
error = ENOBUFS;
break;
}
-
- bzero(buf, size);
bp = buf;
- for (rule = layer3_chain; rule ; rule = rule->next) {
- int i = RULESIZE(rule);
-
+ for (rule = layer3_chain; rule; rule = rule->next) {
if (rule->reserved_1 == IPFW_RULE_INACTIVE) {
continue;
}
- bcopy(rule, bp, i);
- bcopy(&set_disable, &(bp->next_rule),
- sizeof(set_disable));
- bp = (struct ip_fw *)((char *)bp + i);
+
+ if (is64user) {
+ int rulesize_64;
+
+ copyto64fw( rule, (struct ip_fw_64 *)bp, size);
+ bcopy(&set_disable, &(((struct ip_fw_64*)bp)->next_rule), sizeof(set_disable));
+ /* do not use macro RULESIZE64 since we want RULESIZE for ip_fw_64 */
+ rulesize_64 = sizeof(struct ip_fw_64) + ((struct ip_fw_64 *)(bp))->cmd_len * 4 - 4;
+ bp = (struct ip_fw *)((char *)bp + rulesize_64);
+ } else {
+ int rulesize_32;
+
+ copyto32fw( rule, (struct ip_fw_32*)bp, size);
+ bcopy(&set_disable, &(((struct ip_fw_32*)bp)->next_rule), sizeof(set_disable));
+ /* do not use macro RULESIZE32 since we want RULESIZE for ip_fw_32 */
+ rulesize_32 = sizeof(struct ip_fw_32) + ((struct ip_fw_32 *)(bp))->cmd_len * 4 - 4;
+ bp = (struct ip_fw *)((char *)bp + rulesize_32);
+ }
}
if (ipfw_dyn_v) {
int i;
- ipfw_dyn_rule *p, *dst, *last = NULL;
-
- dst = (ipfw_dyn_rule *)bp;
- for (i = 0 ; i < curr_dyn_buckets ; i++ )
- for ( p = ipfw_dyn_v[i] ; p != NULL ;
- p = p->next, dst++ ) {
- bcopy(p, dst, sizeof *p);
- bcopy(&(p->rule->rulenum), &(dst->rule),
- sizeof(p->rule->rulenum));
- /*
- * store a non-null value in "next".
- * The userland code will interpret a
- * NULL here as a marker
- * for the last dynamic rule.
- */
- bcopy(&dst, &dst->next, sizeof(dst));
- last = dst ;
- dst->expire =
- TIME_LEQ(dst->expire, timenow.tv_sec) ?
- 0 : dst->expire - timenow.tv_sec ;
+ ipfw_dyn_rule *p;
+ char *dst, *last = NULL;
+
+ dst = (char *)bp;
+ for (i = 0; i < curr_dyn_buckets; i++) {
+ for (p = ipfw_dyn_v[i]; p != NULL;
+ p = p->next, dst += dynrulesize) {
+ if (is64user) {
+ ipfw_dyn_rule_64 *ipfw_dyn_dst;
+
+ ipfw_dyn_dst = (ipfw_dyn_rule_64 *)dst;
+ /*
+ * store a non-null value in "next".
+ * The userland code will interpret a
+ * NULL here as a marker
+ * for the last dynamic rule.
+ */
+ ipfw_dyn_dst->next = CAST_DOWN_EXPLICIT(user64_addr_t, dst);
+ ipfw_dyn_dst->rule = p->rule->rulenum;
+ ipfw_dyn_dst->parent = CAST_DOWN(user64_addr_t, p->parent);
+ ipfw_dyn_dst->pcnt = p->pcnt;
+ ipfw_dyn_dst->bcnt = p->bcnt;
+ externalize_flow_id(&ipfw_dyn_dst->id, &p->id);
+ ipfw_dyn_dst->expire =
+ TIME_LEQ(p->expire, timenow.tv_sec) ?
+ 0 : p->expire - timenow.tv_sec;
+ ipfw_dyn_dst->bucket = p->bucket;
+ ipfw_dyn_dst->state = p->state;
+ ipfw_dyn_dst->ack_fwd = p->ack_fwd;
+ ipfw_dyn_dst->ack_rev = p->ack_rev;
+ ipfw_dyn_dst->dyn_type = p->dyn_type;
+ ipfw_dyn_dst->count = p->count;
+ last = (char*)ipfw_dyn_dst;
+ } else {
+ ipfw_dyn_rule_32 *ipfw_dyn_dst;
+
+ ipfw_dyn_dst = (ipfw_dyn_rule_32 *)dst;
+ /*
+ * store a non-null value in "next".
+ * The userland code will interpret a
+ * NULL here as a marker
+ * for the last dynamic rule.
+ */
+ ipfw_dyn_dst->next = CAST_DOWN_EXPLICIT(user32_addr_t, dst);
+ ipfw_dyn_dst->rule = p->rule->rulenum;
+ ipfw_dyn_dst->parent = CAST_DOWN_EXPLICIT(user32_addr_t, p->parent);
+ ipfw_dyn_dst->pcnt = p->pcnt;
+ ipfw_dyn_dst->bcnt = p->bcnt;
+ externalize_flow_id(&ipfw_dyn_dst->id, &p->id);
+ ipfw_dyn_dst->expire =
+ TIME_LEQ(p->expire, timenow.tv_sec) ?
+ 0 : p->expire - timenow.tv_sec;
+ ipfw_dyn_dst->bucket = p->bucket;
+ ipfw_dyn_dst->state = p->state;
+ ipfw_dyn_dst->ack_fwd = p->ack_fwd;
+ ipfw_dyn_dst->ack_rev = p->ack_rev;
+ ipfw_dyn_dst->dyn_type = p->dyn_type;
+ ipfw_dyn_dst->count = p->count;
+ last = (char*)ipfw_dyn_dst;
+ }
}
- if (last != NULL) /* mark last dynamic rule */
- bzero(&last->next, sizeof(last));
+ }
+ /* mark last dynamic rule */
+ if (last != NULL) {
+ if (is64user) {
+ ((ipfw_dyn_rule_64 *)last)->next = 0;
+ } else {
+ ((ipfw_dyn_rule_32 *)last)->next = 0;
+ }
+ }
}
lck_mtx_unlock(ipfw_mutex);
/* convert back if necessary and copyout */
if (api_version == IP_FW_VERSION_0) {
- int i, len = 0;
- struct ip_old_fw *buf2, *rule_vers0;
-
- buf2 = _MALLOC(static_count * sizeof(struct ip_old_fw), M_TEMP, M_WAITOK);
+ int i, len = 0;
+ struct ip_old_fw *buf2, *rule_vers0;
+
+ lck_mtx_lock(ipfw_mutex);
+ buf2 = _MALLOC(static_count * sizeof(struct ip_old_fw), M_TEMP, M_WAITOK | M_ZERO);
if (buf2 == 0) {
+ lck_mtx_unlock(ipfw_mutex);
error = ENOBUFS;
}
-
+
if (!error) {
bp = buf;
rule_vers0 = buf2;
-
+
for (i = 0; i < static_count; i++) {
/* static rules have different sizes */
int j = RULESIZE(bp);
- ipfw_convert_from_latest(bp, rule_vers0, api_version);
+ ipfw_convert_from_latest(bp, rule_vers0, api_version, is64user);
bp = (struct ip_fw *)((char *)bp + j);
len += sizeof(*rule_vers0);
rule_vers0++;
}
+ lck_mtx_unlock(ipfw_mutex);
error = sooptcopyout(sopt, buf2, len);
_FREE(buf2, M_TEMP);
}
} else if (api_version == IP_FW_VERSION_1) {
- int i, len = 0, buf_size;
- struct ip_fw_compat *buf2, *rule_vers1;
- struct ipfw_dyn_rule_compat *dyn_rule_vers1, *dyn_last = NULL;
- ipfw_dyn_rule *p;
-
- buf_size = static_count * sizeof(struct ip_fw_compat) +
- dyn_count * sizeof(struct ipfw_dyn_rule_compat);
-
- buf2 = _MALLOC(buf_size, M_TEMP, M_WAITOK);
+ int i, len = 0, buf_size;
+ struct ip_fw_compat *buf2;
+ size_t ipfwcompsize;
+ size_t ipfwdyncompsize;
+ char *rule_vers1;
+
+ lck_mtx_lock(ipfw_mutex);
+ if (is64user) {
+ ipfwcompsize = sizeof(struct ip_fw_compat_64);
+ ipfwdyncompsize = sizeof(struct ipfw_dyn_rule_compat_64);
+ } else {
+ ipfwcompsize = sizeof(struct ip_fw_compat_32);
+ ipfwdyncompsize = sizeof(struct ipfw_dyn_rule_compat_32);
+ }
+
+ buf_size = static_count * ipfwcompsize +
+ dyn_count * ipfwdyncompsize;
+
+ buf2 = _MALLOC(buf_size, M_TEMP, M_WAITOK | M_ZERO);
if (buf2 == 0) {
+ lck_mtx_unlock(ipfw_mutex);
error = ENOBUFS;
}
-
if (!error) {
bp = buf;
- rule_vers1 = buf2;
-
+ rule_vers1 = (char*)buf2;
+
/* first do static rules */
for (i = 0; i < static_count; i++) {
/* static rules have different sizes */
- int j = RULESIZE(bp);
- ipfw_convert_from_latest(bp, rule_vers1, api_version);
- bp = (struct ip_fw *)((char *)bp + j);
- len += sizeof(*rule_vers1);
- rule_vers1++;
+ if (is64user) {
+ int rulesize_64;
+ ipfw_convert_from_latest(bp, (void *)rule_vers1, api_version, is64user);
+ rulesize_64 = sizeof(struct ip_fw_64) + ((struct ip_fw_64 *)(bp))->cmd_len * 4 - 4;
+ bp = (struct ip_fw *)((char *)bp + rulesize_64);
+ } else {
+ int rulesize_32;
+ ipfw_convert_from_latest(bp, (void *)rule_vers1, api_version, is64user);
+ rulesize_32 = sizeof(struct ip_fw_32) + ((struct ip_fw_32 *)(bp))->cmd_len * 4 - 4;
+ bp = (struct ip_fw *)((char *)bp + rulesize_32);
+ }
+ len += ipfwcompsize;
+ rule_vers1 += ipfwcompsize;
}
-
/* now do dynamic rules */
- dyn_rule_vers1 = (struct ipfw_dyn_rule_compat *)rule_vers1;
- if (ipfw_dyn_v) {
- for (i = 0; i < curr_dyn_buckets; i++) {
- for ( p = ipfw_dyn_v[i] ; p != NULL ; p = p->next) {
- (int) dyn_rule_vers1->chain = p->rule->rulenum;
- dyn_rule_vers1->id = p->id;
- dyn_rule_vers1->mask = p->id;
- dyn_rule_vers1->type = p->dyn_type;
- dyn_rule_vers1->expire = p->expire;
- dyn_rule_vers1->pcnt = p->pcnt;
- dyn_rule_vers1->bcnt = p->bcnt;
- dyn_rule_vers1->bucket = p->bucket;
- dyn_rule_vers1->state = p->state;
-
- dyn_rule_vers1->next = dyn_rule_vers1;
- dyn_last = dyn_rule_vers1;
-
- len += sizeof(*dyn_rule_vers1);
- dyn_rule_vers1++;
- }
- }
-
- if (dyn_last != NULL) {
- dyn_last->next = NULL;
- }
+ if (is64user) {
+ cp_dyn_to_comp_64((struct ipfw_dyn_rule_compat_64 *)rule_vers1, &len);
+ } else {
+ cp_dyn_to_comp_32((struct ipfw_dyn_rule_compat_32 *)rule_vers1, &len);
}
-
+
+ lck_mtx_unlock(ipfw_mutex);
error = sooptcopyout(sopt, buf2, len);
_FREE(buf2, M_TEMP);
}
} else {
error = sooptcopyout(sopt, buf, size);
}
-
+
_FREE(buf, M_TEMP);
break;
+ }
case IP_FW_FLUSH:
/*
lck_mtx_lock(ipfw_mutex);
free_chain(&layer3_chain, 0 /* keep default rule */);
+ fw_bypass = 1;
#if DEBUG_INACTIVE_RULES
- print_chain(&layer3_chain);
+ print_chain(&layer3_chain);
#endif
lck_mtx_unlock(ipfw_mutex);
break;
case IP_FW_ADD:
- rule = _MALLOC(RULE_MAXSIZE, M_TEMP, M_WAITOK);
+ {
+ size_t savedsopt_valsize = 0;
+ rule = _MALLOC(RULE_MAXSIZE, M_TEMP, M_WAITOK | M_ZERO);
if (rule == 0) {
error = ENOBUFS;
break;
}
-
- bzero(rule, RULE_MAXSIZE);
if (api_version != IP_FW_CURRENT_API_VERSION) {
- error = ipfw_convert_to_latest(sopt, rule, api_version);
- }
- else {
- error = sooptcopyin(sopt, rule, RULE_MAXSIZE,
- sizeof(struct ip_fw) );
+ error = ipfw_convert_to_latest(sopt, rule, api_version, is64user);
+ } else {
+ savedsopt_valsize = sopt->sopt_valsize; /* it might get modified in sooptcopyin_fw */
+ error = sooptcopyin_fw( sopt, rule, &rulesize);
}
-
+
if (!error) {
if ((api_version == IP_FW_VERSION_0) || (api_version == IP_FW_VERSION_1)) {
/* the rule has already been checked so just
* adjust sopt_valsize to match what would be expected.
*/
sopt->sopt_valsize = RULESIZE(rule);
+ rulesize = RULESIZE(rule);
}
- error = check_ipfw_struct(rule, sopt->sopt_valsize);
+ error = check_ipfw_struct(rule, rulesize);
if (!error) {
lck_mtx_lock(ipfw_mutex);
error = add_rule(&layer3_chain, rule);
+ if (!error && fw_bypass) {
+ fw_bypass = 0;
+ }
lck_mtx_unlock(ipfw_mutex);
-
+
size = RULESIZE(rule);
if (!error && sopt->sopt_dir == SOPT_GET) {
/* convert back if necessary and copyout */
if (api_version == IP_FW_VERSION_0) {
- struct ip_old_fw rule_vers0;
-
- ipfw_convert_from_latest(rule, &rule_vers0, api_version);
+ struct ip_old_fw rule_vers0 = {};
+
+ ipfw_convert_from_latest(rule, &rule_vers0, api_version, is64user);
sopt->sopt_valsize = sizeof(struct ip_old_fw);
-
+
error = sooptcopyout(sopt, &rule_vers0, sizeof(struct ip_old_fw));
} else if (api_version == IP_FW_VERSION_1) {
- struct ip_fw_compat rule_vers1;
-
- ipfw_convert_from_latest(rule, &rule_vers1, api_version);
+ struct ip_fw_compat rule_vers1 = {};
+ ipfw_convert_from_latest(rule, &rule_vers1, api_version, is64user);
sopt->sopt_valsize = sizeof(struct ip_fw_compat);
-
+
error = sooptcopyout(sopt, &rule_vers1, sizeof(struct ip_fw_compat));
} else {
- error = sooptcopyout(sopt, rule, size);
+ char *userrule;
+ userrule = _MALLOC(savedsopt_valsize, M_TEMP, M_WAITOK | M_ZERO);
+ if (userrule == NULL) {
+ userrule = (char*)rule;
+ }
+ if (proc_is64bit(sopt->sopt_p)) {
+ copyto64fw( rule, (struct ip_fw_64*)userrule, savedsopt_valsize);
+ } else {
+ copyto32fw( rule, (struct ip_fw_32*)userrule, savedsopt_valsize);
+ }
+ error = sooptcopyout(sopt, userrule, savedsopt_valsize);
+ if (userrule) {
+ _FREE(userrule, M_TEMP);
+ }
}
}
}
}
-
+
_FREE(rule, M_TEMP);
break;
-
+ }
case IP_FW_DEL:
{
/*
* IP_FW_DEL is used for deleting single rules or sets,
- * and (ab)used to atomically manipulate sets.
+ * and (ab)used to atomically manipulate sets.
* rule->rulenum != 0 indicates single rule delete
* rule->set_masks used to manipulate sets
- * rule->set_masks[0] contains info on sets to be
+ * rule->set_masks[0] contains info on sets to be
* disabled, swapped, or moved
* rule->set_masks[1] contains sets to be enabled.
*/
-
+
/* there is only a simple rule passed in
* (no cmds), so use a temp struct to copy
*/
- struct ip_fw temp_rule;
- u_int32_t arg;
- u_int8_t cmd;
-
+ struct ip_fw temp_rule;
+ u_int32_t arg;
+ u_int8_t cmd;
+
bzero(&temp_rule, sizeof(struct ip_fw));
if (api_version != IP_FW_CURRENT_API_VERSION) {
- error = ipfw_convert_to_latest(sopt, &temp_rule, api_version);
- }
- else {
- error = sooptcopyin(sopt, &temp_rule, sizeof(struct ip_fw),
- sizeof(struct ip_fw) );
+ error = ipfw_convert_to_latest(sopt, &temp_rule, api_version, is64user);
+ } else {
+ error = sooptcopyin_fw(sopt, &temp_rule, 0 );
}
if (!error) {
* single rules or atomically manipulating sets
*/
lck_mtx_lock(ipfw_mutex);
-
+
arg = temp_rule.set_masks[0];
cmd = (arg >> 24) & 0xff;
-
+
if (temp_rule.rulenum) {
/* single rule */
error = del_entry(&layer3_chain, temp_rule.rulenum);
#if DEBUG_INACTIVE_RULES
print_chain(&layer3_chain);
#endif
- }
- else if (cmd) {
+ } else if (cmd) {
/* set reassignment - see comment above del_entry() for details */
error = del_entry(&layer3_chain, temp_rule.set_masks[0]);
#if DEBUG_INACTIVE_RULES
print_chain(&layer3_chain);
#endif
- }
- else if (temp_rule.set_masks[0] != 0 ||
- temp_rule.set_masks[1] != 0) {
+ } else if (temp_rule.set_masks[0] != 0 ||
+ temp_rule.set_masks[1] != 0) {
/* set enable/disable */
set_disable =
- (set_disable | temp_rule.set_masks[0]) & ~temp_rule.set_masks[1] &
- ~(1<<RESVD_SET); /* set RESVD_SET always enabled */
+ (set_disable | temp_rule.set_masks[0]) & ~temp_rule.set_masks[1] &
+ ~(1 << RESVD_SET); /* set RESVD_SET always enabled */
+ }
+
+ if (!layer3_chain->next) {
+ fw_bypass = 1;
}
-
lck_mtx_unlock(ipfw_mutex);
}
break;
/* there is only a simple rule passed in
* (no cmds), so use a temp struct to copy
*/
- struct ip_fw temp_rule = { 0 };
-
+ struct ip_fw temp_rule;
+
+ bzero(&temp_rule, sizeof(struct ip_fw));
+
if (api_version != IP_FW_CURRENT_API_VERSION) {
- error = ipfw_convert_to_latest(sopt, &temp_rule, api_version);
- }
- else {
+ error = ipfw_convert_to_latest(sopt, &temp_rule, api_version, is64user);
+ } else {
if (sopt->sopt_val != 0) {
- error = sooptcopyin(sopt, &temp_rule, sizeof(struct ip_fw),
- sizeof(struct ip_fw) );
+ error = sooptcopyin_fw( sopt, &temp_rule, 0);
}
}
error = EINVAL;
}
- return (error);
+ if (error != EINVAL) {
+ switch (command) {
+ case IP_FW_ADD:
+ case IP_OLD_FW_ADD:
+ ipfw_kev_post_msg(KEV_IPFW_ADD);
+ break;
+ case IP_OLD_FW_DEL:
+ case IP_FW_DEL:
+ ipfw_kev_post_msg(KEV_IPFW_DEL);
+ break;
+ case IP_FW_FLUSH:
+ case IP_OLD_FW_FLUSH:
+ ipfw_kev_post_msg(KEV_IPFW_FLUSH);
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ return error;
}
/**
* every dyn_keepalive_period
*/
static void
-ipfw_tick(void * __unused unused)
+ipfw_tick(__unused void * unused)
{
+ struct mbuf *m0, *m, *mnext, **mtailp;
int i;
- int s;
ipfw_dyn_rule *q;
struct timeval timenow;
+ static int stealth_cnt = 0;
+ if (ipfw_stealth_stats_needs_flush) {
+ stealth_cnt++;
+ if (!(stealth_cnt % IPFW_STEALTH_TIMEOUT_FREQUENCY)) {
+ ipfw_stealth_flush_stats();
+ }
+ }
- if (dyn_keepalive == 0 || ipfw_dyn_v == NULL || dyn_count == 0)
+ if (dyn_keepalive == 0 || ipfw_dyn_v == NULL || dyn_count == 0) {
goto done;
+ }
getmicrotime(&timenow);
+ /*
+ * We make a chain of packets to go out here -- not deferring
+ * until after we drop the ipfw lock would result
+ * in a lock order reversal with the normal packet input -> ipfw
+ * call stack.
+ */
+ m0 = NULL;
+ mtailp = &m0;
+
lck_mtx_lock(ipfw_mutex);
- for (i = 0 ; i < curr_dyn_buckets ; i++) {
- for (q = ipfw_dyn_v[i] ; q ; q = q->next ) {
- if (q->dyn_type == O_LIMIT_PARENT)
+ for (i = 0; i < curr_dyn_buckets; i++) {
+ for (q = ipfw_dyn_v[i]; q; q = q->next) {
+ if (q->dyn_type == O_LIMIT_PARENT) {
continue;
- if (q->id.proto != IPPROTO_TCP)
+ }
+ if (q->id.proto != IPPROTO_TCP) {
continue;
- if ( (q->state & BOTH_SYN) != BOTH_SYN)
+ }
+ if ((q->state & BOTH_SYN) != BOTH_SYN) {
continue;
- if (TIME_LEQ( timenow.tv_sec+dyn_keepalive_interval,
- q->expire))
- continue; /* too early */
- if (TIME_LEQ(q->expire, timenow.tv_sec))
- continue; /* too late, rule expired */
+ }
+ if (TIME_LEQ( timenow.tv_sec + dyn_keepalive_interval,
+ q->expire)) {
+ continue; /* too early */
+ }
+ if (TIME_LEQ(q->expire, timenow.tv_sec)) {
+ continue; /* too late, rule expired */
+ }
+ *mtailp = send_pkt(&(q->id), q->ack_rev - 1, q->ack_fwd, TH_SYN);
+ if (*mtailp != NULL) {
+ mtailp = &(*mtailp)->m_nextpkt;
+ }
- send_pkt(&(q->id), q->ack_rev - 1, q->ack_fwd, TH_SYN);
- send_pkt(&(q->id), q->ack_fwd - 1, q->ack_rev, 0);
+ *mtailp = send_pkt(&(q->id), q->ack_fwd - 1, q->ack_rev, 0);
+ if (*mtailp != NULL) {
+ mtailp = &(*mtailp)->m_nextpkt;
+ }
}
}
lck_mtx_unlock(ipfw_mutex);
+
+ for (m = mnext = m0; m != NULL; m = mnext) {
+ struct route sro; /* fake route */
+
+ mnext = m->m_nextpkt;
+ m->m_nextpkt = NULL;
+ bzero(&sro, sizeof(sro));
+ ip_output(m, NULL, &sro, 0, NULL, NULL);
+ ROUTE_RELEASE(&sro);
+ }
done:
- timeout(ipfw_tick, NULL, dyn_keepalive_period*hz);
+ timeout_with_leeway(ipfw_tick, NULL, dyn_keepalive_period * hz,
+ DYN_KEEPALIVE_LEEWAY * hz);
}
void
ipfw_mutex_grp_attr = lck_grp_attr_alloc_init();
ipfw_mutex_grp = lck_grp_alloc_init("ipfw", ipfw_mutex_grp_attr);
ipfw_mutex_attr = lck_attr_alloc_init();
- lck_attr_setdefault(ipfw_mutex_attr);
-
- if ((ipfw_mutex = lck_mtx_alloc_init(ipfw_mutex_grp, ipfw_mutex_attr)) == NULL) {
- printf("ipfw_init: can't alloc ipfw_mutex\n");
- return;
- }
+ lck_mtx_init(ipfw_mutex, ipfw_mutex_grp, ipfw_mutex_attr);
layer3_chain = NULL;
default_rule.cmd[0].len = 1;
default_rule.cmd[0].opcode =
#ifdef IPFIREWALL_DEFAULT_TO_ACCEPT
- 1 ? O_ACCEPT :
+ (1) ? O_ACCEPT :
#endif
- O_DENY;
+ O_DENY;
if (add_rule(&layer3_chain, &default_rule)) {
printf("ipfw2: add_rule failed adding default rule\n");
printf("ipfw2 failed initialization!!\n");
fw_enable = 0;
- }
- else {
+ } else {
ip_fw_default_rule = layer3_chain;
-#if 0
- /* Radar 3920649, don't print unncessary messages to the log */
- printf("ipfw2 initialized, divert %s, "
- "rule-based forwarding enabled, default to %s, logging ",
- #ifdef IPDIVERT
- "enabled",
- #else
- "disabled",
- #endif
- default_rule.cmd[0].opcode == O_ACCEPT ? "accept" : "deny");
-#endif
-
+
#ifdef IPFIREWALL_VERBOSE
fw_verbose = 1;
#endif
#ifdef IPFIREWALL_VERBOSE_LIMIT
verbose_limit = IPFIREWALL_VERBOSE_LIMIT;
#endif
- if (fw_verbose == 0)
- printf("disabled\n");
- else if (verbose_limit == 0)
- printf("unlimited\n");
- else
- printf("limited to %d packets/entry by default\n",
- verbose_limit);
+ if (fw_verbose) {
+ if (!verbose_limit) {
+ printf("ipfw2 verbose logging enabled: unlimited logging by default\n");
+ } else {
+ printf("ipfw2 verbose logging enabled: limited to %d packets/entry by default\n",
+ verbose_limit);
+ }
+ }
}
ip_fw_chk_ptr = ipfw_chk;
ip_fw_ctl_ptr = ipfw_ctl;
- ipfwstringlen = strlen( ipfwstring );
+ ipfwstringlen = strlen( ipfwstring );
timeout(ipfw_tick, NULL, hz);
}
projects / apple / xnu.git / blobdiff