-/* $KAME: ip6_forward.c,v 1.29 2000/02/26 18:08:38 itojun Exp $ */
+/*
+ * Copyright (c) 2008 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@
+ */
+
+/* $FreeBSD: src/sys/netinet6/ip6_forward.c,v 1.16 2002/10/16 02:25:05 sam Exp $ */
+/* $KAME: ip6_forward.c,v 1.69 2001/05/17 03:48:30 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* SUCH DAMAGE.
*/
-#if (defined(__FreeBSD__) && __FreeBSD__ >= 3)
-#include "opt_ip6fw.h"
-#include "opt_inet.h"
-#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
#include <netinet/ip_var.h>
+#include <netinet6/in6_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet/icmp6.h>
#include <netinet6/nd6.h>
-#if IPSEC_IPV6FWD
+#include <netinet/in_pcb.h>
+
+#if IPSEC
#include <netinet6/ipsec.h>
+#if INET6
+#include <netinet6/ipsec6.h>
+#endif
#include <netkey/key.h>
-#include <netkey/key_debug.h>
-#endif /* IPSEC_IPV6FWD */
+extern int ipsec_bypass;
+#endif /* IPSEC */
+extern lck_mtx_t *ip6_mutex;
-#if IPV6FIREWALL
#include <netinet6/ip6_fw.h>
-#endif
-
-#if MIP6
-#include <netinet6/mip6.h>
-#endif
#include <net/net_osdep.h>
-struct route_in6 ip6_forward_rt;
+#if PF
+#include <net/pfvar.h>
+#endif /* PF */
/*
* Forward a packet. If some error occurs return the sender
*/
void
-ip6_forward(m, srcrt)
- struct mbuf *m;
- int srcrt;
+ip6_forward(struct mbuf *m, struct route_in6 *ip6forward_rt,
+ int srcrt, int locked)
{
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
- register struct sockaddr_in6 *dst;
- register struct rtentry *rt;
+ struct sockaddr_in6 *dst;
+ struct rtentry *rt;
int error, type = 0, code = 0;
struct mbuf *mcopy = NULL;
-#if IPSEC_IPV6FWD
+ struct ifnet *ifp, *origifp; /* maybe unnecessary */
+#if IPSEC
struct secpolicy *sp = NULL;
#endif
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined(__APPLE__)
- long time_second = time.tv_sec;
-#endif
+ struct timeval timenow;
+ int tunneledv4 = 0;
+
+ getmicrotime(&timenow);
+
-#if IPSEC_IPV6FWD
+#if IPSEC
/*
* Check AH/ESP integrity.
*/
* Don't increment ip6s_cantforward because this is the check
* before forwarding packet actually.
*/
- if (ipsec6_in_reject(m, NULL)) {
- ipsec6stat.in_polvio++;
- m_freem(m);
- return;
+ if (ipsec_bypass == 0) {
+ if (ipsec6_in_reject(m, NULL)) {
+ IPSEC_STAT_INCREMENT(ipsec6stat.in_polvio);
+ m_freem(m);
+ return;
+ }
}
-#endif /*IPSEC_IPV6FWD*/
+#endif /*IPSEC*/
+ /*
+ * Do not forward packets to multicast destination (should be handled
+ * by ip6_mforward().
+ * Do not forward packets with unspecified source. It was discussed
+ * in July 2000, on ipngwg mailing list.
+ */
if ((m->m_flags & (M_BCAST|M_MCAST)) != 0 ||
- IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
+ IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
ip6stat.ip6s_cantforward++;
/* XXX in6_ifstat_inc(rt->rt_ifp, ifs6_in_discard) */
- if (ip6_log_time + ip6_log_interval < time_second) {
- ip6_log_time = time_second;
+ if (ip6_log_time + ip6_log_interval < timenow.tv_sec) {
+ ip6_log_time = timenow.tv_sec;
log(LOG_DEBUG,
"cannot forward "
"from %s to %s nxt %d received on %s\n",
if (ip6->ip6_hlim <= IPV6_HLIMDEC) {
/* XXX in6_ifstat_inc(rt->rt_ifp, ifs6_in_discard) */
+ if (locked)
+ lck_mtx_unlock(ip6_mutex);
icmp6_error(m, ICMP6_TIME_EXCEEDED,
ICMP6_TIME_EXCEED_TRANSIT, 0);
+ if (locked)
+ lck_mtx_lock(ip6_mutex);
return;
}
ip6->ip6_hlim -= IPV6_HLIMDEC;
*/
mcopy = m_copy(m, 0, imin(m->m_pkthdr.len, ICMPV6_PLD_MAXLEN));
-
-#if IPSEC_IPV6FWD
+#if IPSEC
+ if (ipsec_bypass != 0)
+ goto skip_ipsec;
/* get a security policy for this packet */
- sp = ipsec6_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND, 0, &error);
+ sp = ipsec6_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND, IP_FORWARDING,
+ &error);
if (sp == NULL) {
- ipsec6stat.out_inval++;
+ IPSEC_STAT_INCREMENT(ipsec6stat.out_inval);
ip6stat.ip6s_cantforward++;
if (mcopy) {
#if 0
/* check policy */
switch (sp->policy) {
case IPSEC_POLICY_DISCARD:
+ case IPSEC_POLICY_GENERATE:
/*
* This packet is just discarded.
*/
- ipsec6stat.out_polvio++;
+ IPSEC_STAT_INCREMENT(ipsec6stat.out_polvio);
ip6stat.ip6s_cantforward++;
- key_freesp(sp);
+ key_freesp(sp, KEY_SADB_UNLOCKED);
if (mcopy) {
#if 0
/* XXX: what icmp ? */
case IPSEC_POLICY_BYPASS:
case IPSEC_POLICY_NONE:
/* no need to do IPsec. */
- key_freesp(sp);
+ key_freesp(sp, KEY_SADB_UNLOCKED);
goto skip_ipsec;
-
+
case IPSEC_POLICY_IPSEC:
if (sp->req == NULL) {
/* XXX should be panic ? */
printf("ip6_forward: No IPsec request specified.\n");
ip6stat.ip6s_cantforward++;
- key_freesp(sp);
+ key_freesp(sp, KEY_SADB_UNLOCKED);
if (mcopy) {
#if 0
/* XXX: what icmp ? */
default:
/* should be panic ?? */
printf("ip6_forward: Invalid policy found. %d\n", sp->policy);
- key_freesp(sp);
+ key_freesp(sp, KEY_SADB_UNLOCKED);
goto skip_ipsec;
}
state.ro = NULL; /* update at ipsec6_output_tunnel() */
state.dst = NULL; /* update at ipsec6_output_tunnel() */
- error = ipsec6_output_tunnel(&state, sp, 0);
-
+ if (locked)
+ lck_mtx_unlock(ip6_mutex);
+ error = ipsec6_output_tunnel(&state, sp, 0, &tunneledv4);
+ if (locked)
+ lck_mtx_lock(ip6_mutex);
+ key_freesp(sp, KEY_SADB_UNLOCKED);
+ if (tunneledv4)
+ return; /* packet is gone - sent over IPv4 */
+
m = state.m;
-#if 0 /* XXX allocate a route (ro, dst) again later */
- ro = (struct route_in6 *)state.ro;
- dst = (struct sockaddr_in6 *)state.dst;
-#endif
- key_freesp(sp);
-
if (error) {
/* mbuf is already reclaimed in ipsec6_output_tunnel. */
switch (error) {
break;
default:
printf("ip6_output (ipsec): error code %d\n", error);
- /*fall through*/
+ /* fall through */
case ENOENT:
/* don't show these error codes to the user */
break;
}
}
skip_ipsec:
-#endif /* IPSEC_IPV6FWD */
-
-#if MIP6
- {
- struct mip6_bc *bc;
-
- bc = mip6_bc_find(&ip6->ip6_dst);
- if ((bc != NULL) && (bc->hr_flag)) {
- if (mip6_tunnel_output(&m, bc) != 0) {
- ip6stat.ip6s_cantforward++;
- if (mcopy)
- m_freem(mcopy);
- m_freem(m);
- return;
- }
- }
- ip6 = mtod(m, struct ip6_hdr *); /* m has changed */
+#endif /* IPSEC */
+
+ /*
+ * If "locked", ip6forward_rt points to the globally defined
+ * struct route cache which requires ip6_mutex, e.g. when this
+ * is called from ip6_input(). Else the caller is responsible
+ * for the struct route and its serialization (if needed), e.g.
+ * when this is called from ip6_rthdr0().
+ */
+ if (locked)
+ lck_mtx_assert(ip6_mutex, LCK_MTX_ASSERT_OWNED);
+ dst = (struct sockaddr_in6 *)&ip6forward_rt->ro_dst;
+ if ((rt = ip6forward_rt->ro_rt) != NULL) {
+ RT_LOCK(rt);
+ /* Take an extra ref for ourselves */
+ RT_ADDREF_LOCKED(rt);
}
-#endif
-
- dst = &ip6_forward_rt.ro_dst;
+
if (!srcrt) {
/*
- * ip6_forward_rt.ro_dst.sin6_addr is equal to ip6->ip6_dst
+ * ip6forward_rt->ro_dst.sin6_addr is equal to ip6->ip6_dst
*/
- if (ip6_forward_rt.ro_rt == 0 ||
- (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) == 0) {
- if (ip6_forward_rt.ro_rt) {
- RTFREE(ip6_forward_rt.ro_rt);
- ip6_forward_rt.ro_rt = 0;
+ if (rt == NULL || !(rt->rt_flags & RTF_UP) ||
+ rt->generation_id != route_generation) {
+ if (rt != NULL) {
+ /* Release extra ref */
+ RT_REMREF_LOCKED(rt);
+ RT_UNLOCK(rt);
+ rtfree(rt);
+ ip6forward_rt->ro_rt = NULL;
}
/* this probably fails but give it a try again */
-#if __FreeBSD__ || defined(__APPLE__)
- rtalloc_ign((struct route *)&ip6_forward_rt,
- RTF_PRCLONING);
-#else
- rtalloc((struct route *)&ip6_forward_rt);
-#endif
+ rtalloc_ign((struct route *)ip6forward_rt,
+ RTF_PRCLONING);
+ if ((rt = ip6forward_rt->ro_rt) != NULL) {
+ RT_LOCK(rt);
+ /* Take an extra ref for ourselves */
+ RT_ADDREF_LOCKED(rt);
+ }
}
-
- if (ip6_forward_rt.ro_rt == 0) {
+
+ if (rt == NULL) {
ip6stat.ip6s_noroute++;
- /* XXX in6_ifstat_inc(rt->rt_ifp, ifs6_in_noroute) */
+ in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_noroute);
if (mcopy) {
+ if (locked)
+ lck_mtx_unlock(ip6_mutex);
icmp6_error(mcopy, ICMP6_DST_UNREACH,
ICMP6_DST_UNREACH_NOROUTE, 0);
+ if (locked)
+ lck_mtx_lock(ip6_mutex);
}
m_freem(m);
return;
}
- } else if ((rt = ip6_forward_rt.ro_rt) == 0 ||
- !IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &dst->sin6_addr)) {
- if (ip6_forward_rt.ro_rt) {
- RTFREE(ip6_forward_rt.ro_rt);
- ip6_forward_rt.ro_rt = 0;
+ RT_LOCK_ASSERT_HELD(rt);
+ } else if (rt == NULL || !(rt->rt_flags & RTF_UP) ||
+ !IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &dst->sin6_addr) ||
+ rt->generation_id != route_generation) {
+ if (rt != NULL) {
+ /* Release extra ref */
+ RT_REMREF_LOCKED(rt);
+ RT_UNLOCK(rt);
+ rtfree(rt);
+ ip6forward_rt->ro_rt = NULL;
}
bzero(dst, sizeof(*dst));
dst->sin6_len = sizeof(struct sockaddr_in6);
dst->sin6_family = AF_INET6;
dst->sin6_addr = ip6->ip6_dst;
-#if __FreeBSD__ || defined(__APPLE__)
- rtalloc_ign((struct route *)&ip6_forward_rt, RTF_PRCLONING);
-#else
- rtalloc((struct route *)&ip6_forward_rt);
-#endif
- if (ip6_forward_rt.ro_rt == 0) {
+ rtalloc_ign((struct route *)ip6forward_rt, RTF_PRCLONING);
+ if ((rt = ip6forward_rt->ro_rt) == NULL) {
ip6stat.ip6s_noroute++;
- /* XXX in6_ifstat_inc(rt->rt_ifp, ifs6_in_noroute) */
+ in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_noroute);
if (mcopy) {
+ if (locked)
+ lck_mtx_unlock(ip6_mutex);
icmp6_error(mcopy, ICMP6_DST_UNREACH,
- ICMP6_DST_UNREACH_NOROUTE, 0);
+ ICMP6_DST_UNREACH_NOROUTE, 0);
+ if (locked)
+ lck_mtx_lock(ip6_mutex);
}
m_freem(m);
return;
}
+ RT_LOCK(rt);
+ /* Take an extra ref for ourselves */
+ RT_ADDREF_LOCKED(rt);
}
- rt = ip6_forward_rt.ro_rt;
/*
* Scope check: if a packet can't be delivered to its destination
* for the reason that the destination is beyond the scope of the
* source address, discard the packet and return an icmp6 destination
* unreachable error with Code 2 (beyond scope of source address).
- * [draft-ietf-ipngwg-icmp-v3-00.txt, Section 3.1]
+ * [draft-ietf-ipngwg-icmp-v3-02.txt, Section 3.1]
*/
if (in6_addr2scopeid(m->m_pkthdr.rcvif, &ip6->ip6_src) !=
in6_addr2scopeid(rt->rt_ifp, &ip6->ip6_src)) {
ip6stat.ip6s_badscope++;
in6_ifstat_inc(rt->rt_ifp, ifs6_in_discard);
- if (ip6_log_time + ip6_log_interval < time_second) {
- ip6_log_time = time_second;
+ if (ip6_log_time + ip6_log_interval < timenow.tv_sec) {
+ ip6_log_time = timenow.tv_sec;
log(LOG_DEBUG,
"cannot forward "
"src %s, dst %s, nxt %d, rcvif %s, outif %s\n",
ip6->ip6_nxt,
if_name(m->m_pkthdr.rcvif), if_name(rt->rt_ifp));
}
- if (mcopy)
+ /* Release extra ref */
+ RT_REMREF_LOCKED(rt);
+ RT_UNLOCK(rt);
+ if (mcopy) {
+ if (locked)
+ lck_mtx_unlock(ip6_mutex);
icmp6_error(mcopy, ICMP6_DST_UNREACH,
ICMP6_DST_UNREACH_BEYONDSCOPE, 0);
+ if (locked)
+ lck_mtx_lock(ip6_mutex);
+ }
m_freem(m);
return;
}
if (m->m_pkthdr.len > rt->rt_ifp->if_mtu) {
in6_ifstat_inc(rt->rt_ifp, ifs6_in_toobig);
if (mcopy) {
- u_long mtu;
-#if IPSEC_IPV6FWD
- struct secpolicy *sp;
+ uint32_t mtu;
+#if IPSEC
+ struct secpolicy *sp2;
int ipsecerror;
size_t ipsechdrsiz;
#endif
mtu = rt->rt_ifp->if_mtu;
-#if IPSEC_IPV6FWD
+#if IPSEC
/*
* When we do IPsec tunnel ingress, we need to play
* with if_mtu value (decrement IPsec header size
* case, as we have the outgoing interface for
* encapsulated packet as "rt->rt_ifp".
*/
- sp = ipsec6_getpolicybyaddr(mcopy, IPSEC_DIR_OUTBOUND,
+ sp2 = ipsec6_getpolicybyaddr(mcopy, IPSEC_DIR_OUTBOUND,
IP_FORWARDING, &ipsecerror);
- if (sp) {
+ if (sp2) {
ipsechdrsiz = ipsec6_hdrsiz(mcopy,
IPSEC_DIR_OUTBOUND, NULL);
if (ipsechdrsiz < mtu)
mtu -= ipsechdrsiz;
+ key_freesp(sp2, KEY_SADB_UNLOCKED);
}
-
/*
* if mtu becomes less than minimum MTU,
* tell minimum MTU (and I'll need to fragment it).
if (mtu < IPV6_MMTU)
mtu = IPV6_MMTU;
#endif
+ /* Release extra ref */
+ RT_REMREF_LOCKED(rt);
+ RT_UNLOCK(rt);
+ if (locked)
+ lck_mtx_unlock(ip6_mutex);
icmp6_error(mcopy, ICMP6_PACKET_TOO_BIG, 0, mtu);
+ if (locked)
+ lck_mtx_lock(ip6_mutex);
+ } else {
+ /* Release extra ref */
+ RT_REMREF_LOCKED(rt);
+ RT_UNLOCK(rt);
}
m_freem(m);
return;
* modified by a redirect.
*/
if (rt->rt_ifp == m->m_pkthdr.rcvif && !srcrt &&
- (rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) == 0)
+ (rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) == 0) {
+ if ((rt->rt_ifp->if_flags & IFF_POINTOPOINT) != 0) {
+ /*
+ * If the incoming interface is equal to the outgoing
+ * one, and the link attached to the interface is
+ * point-to-point, then it will be highly probable
+ * that a routing loop occurs. Thus, we immediately
+ * drop the packet and send an ICMPv6 error message.
+ *
+ * type/code is based on suggestion by Rich Draves.
+ * not sure if it is the best pick.
+ */
+ RT_REMREF_LOCKED(rt); /* Release extra ref */
+ RT_UNLOCK(rt);
+ if (locked)
+ lck_mtx_unlock(ip6_mutex);
+ icmp6_error(mcopy, ICMP6_DST_UNREACH,
+ ICMP6_DST_UNREACH_ADDR, 0);
+ if (locked)
+ lck_mtx_lock(ip6_mutex);
+ m_freem(m);
+ return;
+ }
type = ND_REDIRECT;
+ }
-#if IPV6FIREWALL
+#if IPFW2
/*
* Check with the firewall...
*/
- if (ip6_fw_chk_ptr) {
+ if (ip6_fw_enable && ip6_fw_chk_ptr) {
u_short port = 0;
+ ifp = rt->rt_ifp;
+ /* Drop the lock but retain the extra ref */
+ RT_UNLOCK(rt);
/* If ipfw says divert, we have to just drop packet */
- if ((*ip6_fw_chk_ptr)(&ip6, rt->rt_ifp, &port, &m)) {
+ if (ip6_fw_chk_ptr(&ip6, ifp, &port, &m)) {
m_freem(m);
goto freecopy;
}
- if (!m)
+ if (!m) {
goto freecopy;
+ }
+ /* We still have the extra ref on rt */
+ RT_LOCK(rt);
}
#endif
-#if OLDIP6OUTPUT
- error = (*rt->rt_ifp->if_output)(rt->rt_ifp, m,
- (struct sockaddr *)dst,
- ip6_forward_rt.ro_rt);
+ /*
+ * Fake scoped addresses. Note that even link-local source or
+ * destinaion can appear, if the originating node just sends the
+ * packet to us (without address resolution for the destination).
+ * Since both icmp6_error and icmp6_redirect_output fill the embedded
+ * link identifiers, we can do this stuff after making a copy for
+ * returning an error.
+ */
+ if ((rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) {
+ /*
+ * See corresponding comments in ip6_output.
+ * XXX: but is it possible that ip6_forward() sends a packet
+ * to a loopback interface? I don't think so, and thus
+ * I bark here. (jinmei@kame.net)
+ * XXX: it is common to route invalid packets to loopback.
+ * also, the codepath will be visited on use of ::1 in
+ * rthdr. (itojun)
+ */
+#if 1
+ if (0)
#else
- error = nd6_output(rt->rt_ifp, m, dst, rt);
-#endif
+ if ((rt->rt_flags & (RTF_BLACKHOLE|RTF_REJECT)) == 0)
+#endif
+ {
+ printf("ip6_forward: outgoing interface is loopback. "
+ "src %s, dst %s, nxt %d, rcvif %s, outif %s\n",
+ ip6_sprintf(&ip6->ip6_src),
+ ip6_sprintf(&ip6->ip6_dst),
+ ip6->ip6_nxt, if_name(m->m_pkthdr.rcvif),
+ if_name(rt->rt_ifp));
+ }
+
+ /* we can just use rcvif in forwarding. */
+ origifp = m->m_pkthdr.rcvif;
+ }
+ else
+ origifp = rt->rt_ifp;
+#ifndef SCOPEDROUTING
+ /*
+ * clear embedded scope identifiers if necessary.
+ * in6_clearscope will touch the addresses only when necessary.
+ */
+ in6_clearscope(&ip6->ip6_src);
+ in6_clearscope(&ip6->ip6_dst);
+#endif
+
+ ifp = rt->rt_ifp;
+ /* Drop the lock but retain the extra ref */
+ RT_UNLOCK(rt);
+
+#if PF
+ if (locked)
+ lck_mtx_unlock(ip6_mutex);
+
+ /* Invoke outbound packet filter */
+ error = pf_af_hook(ifp, NULL, &m, AF_INET6, FALSE);
+
+ if (locked)
+ lck_mtx_lock(ip6_mutex);
+
+ if (error) {
+ if (m != NULL) {
+ panic("%s: unexpected packet %p\n", __func__, m);
+ /* NOTREACHED */
+ }
+ /* Already freed by callee */
+ goto senderr;
+ }
+ ip6 = mtod(m, struct ip6_hdr *);
+#endif /* PF */
+
+ error = nd6_output(ifp, origifp, m, dst, rt, locked);
if (error) {
- in6_ifstat_inc(rt->rt_ifp, ifs6_out_discard);
+ in6_ifstat_inc(ifp, ifs6_out_discard);
ip6stat.ip6s_cantforward++;
} else {
ip6stat.ip6s_forward++;
- in6_ifstat_inc(rt->rt_ifp, ifs6_out_forward);
+ in6_ifstat_inc(ifp, ifs6_out_forward);
if (type)
ip6stat.ip6s_redirectsent++;
else {
- if (mcopy)
+ if (mcopy) {
goto freecopy;
+ }
}
}
- if (mcopy == NULL)
+#if PF
+senderr:
+#endif /* PF */
+ if (mcopy == NULL) {
+ /* Release extra ref */
+ RT_REMREF(rt);
return;
-
+ }
switch (error) {
case 0:
#if 1
if (type == ND_REDIRECT) {
icmp6_redirect_output(mcopy, rt);
+ /* Release extra ref */
+ RT_REMREF(rt);
return;
}
#endif
code = ICMP6_DST_UNREACH_ADDR;
break;
}
+ if (locked)
+ lck_mtx_unlock(ip6_mutex);
icmp6_error(mcopy, type, code, 0);
+ if (locked)
+ lck_mtx_lock(ip6_mutex);
+ /* Release extra ref */
+ RT_REMREF(rt);
return;
freecopy:
m_freem(mcopy);
+ /* Release extra ref */
+ RT_REMREF(rt);
return;
}
projects / apple / xnu.git / blobdiff