-/* $KAME: nd6_nbr.c,v 1.32 2000/03/21 11:37:30 itojun Exp $ */
+/*
+ * Copyright (c) 2009 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/nd6_nbr.c,v 1.4.2.4 2001/07/06 05:32:25 sumikawa Exp $ */
+/* $KAME: nd6_nbr.c,v 1.64 2001/05/17 03:48:30 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* SUCH DAMAGE.
*/
-#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__)
-#include "opt_inet.h"
-#if __NetBSD__ /*XXX*/
-#include "opt_ipsec.h"
-#endif
-#endif
-
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/errno.h>
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
-#include <sys/ioctl.h>
-#endif
#include <sys/syslog.h>
#include <kern/queue.h>
#include <netinet6/nd6.h>
#include <netinet/icmp6.h>
-#ifdef __OpenBSD__ /*don't confuse KAME ipsec with OpenBSD ipsec*/
-#undef IPSEC
-#endif
-
#if IPSEC
#include <netinet6/ipsec.h>
+#if INET6
+#include <netinet6/ipsec6.h>
+#endif
+extern int ipsec_bypass;
#endif
#include <net/net_osdep.h>
#define SDL(s) ((struct sockaddr_dl *)s)
struct dadq;
-static struct dadq *nd6_dad_find __P((struct ifaddr *));
-static void nd6_dad_timer __P((struct ifaddr *));
-static void nd6_dad_ns_output __P((struct dadq *, struct ifaddr *));
-static void nd6_dad_ns_input __P((struct ifaddr *));
-static void nd6_dad_na_input __P((struct ifaddr *));
+static struct dadq *nd6_dad_find(struct ifaddr *);
+#ifndef __APPLE__
+static void nd6_dad_starttimer(struct dadq *, int);
+static void nd6_dad_stoptimer(struct dadq *);
+#else
+void nd6_dad_stoptimer(struct ifaddr *);
+#endif
+static void nd6_dad_timer(struct ifaddr *);
+static void nd6_dad_ns_output(struct dadq *, struct ifaddr *);
+static void nd6_dad_ns_input(struct ifaddr *);
+static void nd6_dad_na_input(struct ifaddr *);
static int dad_ignore_ns = 0; /* ignore NS in DAD - specwise incorrect*/
static int dad_maxtry = 15; /* max # of *tries* to transmit DAD packet */
+extern lck_mtx_t *dad6_mutex;
+extern lck_mtx_t *nd6_mutex;
/*
* Input an Neighbor Solicitation Message.
*
* Based on RFC 2462 (duplicated address detection)
*/
void
-nd6_ns_input(m, off, icmp6len)
- struct mbuf *m;
- int off, icmp6len;
+nd6_ns_input(
+ struct mbuf *m,
+ int off,
+ int icmp6len)
{
struct ifnet *ifp = m->m_pkthdr.rcvif;
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
struct in6_addr taddr6;
struct in6_addr myaddr6;
char *lladdr = NULL;
- struct ifaddr *ifa;
+ struct ifaddr *ifa = NULL;
int lladdrlen = 0;
int anycast = 0, proxy = 0, tentative = 0;
int tlladdr;
union nd_opts ndopts;
- struct sockaddr_dl *proxydl = NULL;
+ struct sockaddr_dl proxydl;
+
+#ifndef PULLDOWN_TEST
+ IP6_EXTHDR_CHECK(m, off, icmp6len, return);
+ nd_ns = (struct nd_neighbor_solicit *)((caddr_t)ip6 + off);
+#else
+ IP6_EXTHDR_GET(nd_ns, struct nd_neighbor_solicit *, m, off, icmp6len);
+ if (nd_ns == NULL) {
+ icmp6stat.icp6s_tooshort++;
+ return;
+ }
+#endif
+ ip6 = mtod(m, struct ip6_hdr *); /* adjust pointer for safety */
+ taddr6 = nd_ns->nd_ns_target;
if (ip6->ip6_hlim != 255) {
- log(LOG_ERR,
- "nd6_ns_input: invalid hlim %d\n", ip6->ip6_hlim);
- goto freeit;
+ nd6log((LOG_ERR,
+ "nd6_ns_input: invalid hlim (%d) from %s to %s on %s\n",
+ ip6->ip6_hlim, ip6_sprintf(&ip6->ip6_src),
+ ip6_sprintf(&ip6->ip6_dst), if_name(ifp)));
+ goto bad;
}
if (IN6_IS_ADDR_UNSPECIFIED(&saddr6)) {
/* dst has to be solicited node multicast address. */
if (daddr6.s6_addr16[0] == IPV6_ADDR_INT16_MLL
- /*don't check ifindex portion*/
+ /* don't check ifindex portion */
&& daddr6.s6_addr32[1] == 0
&& daddr6.s6_addr32[2] == IPV6_ADDR_INT32_ONE
&& daddr6.s6_addr8[12] == 0xff) {
- ; /*good*/
+ ; /* good */
} else {
- log(LOG_INFO, "nd6_ns_input: bad DAD packet "
- "(wrong ip6 dst)\n");
+ nd6log((LOG_INFO, "nd6_ns_input: bad DAD packet "
+ "(wrong ip6 dst)\n"));
goto bad;
}
}
-#ifndef PULLDOWN_TEST
- IP6_EXTHDR_CHECK(m, off, icmp6len,);
- nd_ns = (struct nd_neighbor_solicit *)((caddr_t)ip6 + off);
-#else
- IP6_EXTHDR_GET(nd_ns, struct nd_neighbor_solicit *, m, off, icmp6len);
- if (nd_ns == NULL) {
- icmp6stat.icp6s_tooshort++;
- return;
- }
-#endif
- taddr6 = nd_ns->nd_ns_target;
-
if (IN6_IS_ADDR_MULTICAST(&taddr6)) {
- log(LOG_INFO, "nd6_ns_input: bad NS target (multicast)\n");
+ nd6log((LOG_INFO, "nd6_ns_input: bad NS target (multicast)\n"));
goto bad;
}
icmp6len -= sizeof(*nd_ns);
nd6_option_init(nd_ns + 1, icmp6len, &ndopts);
if (nd6_options(&ndopts) < 0) {
- log(LOG_INFO, "nd6_ns_input: invalid ND option, ignored\n");
- goto bad;
+ nd6log((LOG_INFO,
+ "nd6_ns_input: invalid ND option, ignored\n"));
+ /* nd6_options have incremented stats */
+ goto freeit;
}
if (ndopts.nd_opts_src_lladdr) {
- lladdr = (char *)(ndopts.nd_opts_src_lladdr +1);
+ lladdr = (char *)(ndopts.nd_opts_src_lladdr + 1);
lladdrlen = ndopts.nd_opts_src_lladdr->nd_opt_len << 3;
}
if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src) && lladdr) {
- log(LOG_INFO, "nd6_ns_input: bad DAD packet "
- "(link-layer address option)\n");
+ nd6log((LOG_INFO, "nd6_ns_input: bad DAD packet "
+ "(link-layer address option)\n"));
goto bad;
}
tsin6.sin6_family = AF_INET6;
tsin6.sin6_addr = taddr6;
- rt = rtalloc1((struct sockaddr *)&tsin6, 0
-#if __FreeBSD__ || defined (__APPLE__)
- , 0
-#endif /* __FreeBSD__ */
- );
- if (rt && (rt->rt_flags & RTF_ANNOUNCE) != 0 &&
- rt->rt_gateway->sa_family == AF_LINK) {
- /*
- * proxy NDP for single entry
- */
- ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp,
- IN6_IFF_NOTREADY|IN6_IFF_ANYCAST);
- if (ifa) {
- proxy = 1;
- proxydl = SDL(rt->rt_gateway);
+ rt = rtalloc1((struct sockaddr *)&tsin6, 0, 0);
+ if (rt != NULL) {
+ RT_LOCK(rt);
+ if ((rt->rt_flags & RTF_ANNOUNCE) != 0 &&
+ rt->rt_gateway->sa_family == AF_LINK) {
+ /*
+ * proxy NDP for single entry
+ */
+ ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(
+ ifp, IN6_IFF_NOTREADY|IN6_IFF_ANYCAST);
+ if (ifa) {
+ proxy = 1;
+ proxydl = *SDL(rt->rt_gateway);
+ }
}
- }
- if (rt)
+ RT_UNLOCK(rt);
rtfree(rt);
+ }
}
if (!ifa) {
/*
- * We've got a NS packet, and we don't have that adddress
+ * We've got an NS packet, and we don't have that adddress
* assigned for us. We MUST silently ignore it.
* See RFC2461 7.2.3.
*/
goto freeit;
if (lladdr && ((ifp->if_addrlen + 2 + 7) & ~7) != lladdrlen) {
- log(LOG_INFO,
+ nd6log((LOG_INFO,
"nd6_ns_input: lladdrlen mismatch for %s "
"(if %d, NS packet %d)\n",
- ip6_sprintf(&taddr6), ifp->if_addrlen, lladdrlen - 2);
+ ip6_sprintf(&taddr6), ifp->if_addrlen, lladdrlen - 2));
+ goto bad;
}
if (IN6_ARE_ADDR_EQUAL(&myaddr6, &saddr6)) {
- log(LOG_INFO,
- "nd6_ns_input: duplicate IP6 address %s\n",
- ip6_sprintf(&saddr6));
+ nd6log((LOG_INFO,
+ "nd6_ns_input: duplicate IP6 address %s\n",
+ ip6_sprintf(&saddr6)));
goto freeit;
}
((anycast || proxy || !tlladdr)
? 0 : ND_NA_FLAG_OVERRIDE)
| (ip6_forwarding ? ND_NA_FLAG_ROUTER : 0),
- tlladdr, (struct sockaddr *)proxydl);
+ tlladdr, proxy ? (struct sockaddr *)&proxydl : NULL);
goto freeit;
}
((anycast || proxy || !tlladdr) ? 0 : ND_NA_FLAG_OVERRIDE)
| (ip6_forwarding ? ND_NA_FLAG_ROUTER : 0)
| ND_NA_FLAG_SOLICITED,
- tlladdr, (struct sockaddr *)proxydl);
+ tlladdr, proxy ? (struct sockaddr *)&proxydl : NULL);
freeit:
m_freem(m);
+ if (ifa != NULL)
+ ifafree(ifa);
return;
bad:
- log(LOG_ERR, "nd6_ns_input: src=%s\n", ip6_sprintf(&saddr6));
- log(LOG_ERR, "nd6_ns_input: dst=%s\n", ip6_sprintf(&daddr6));
- log(LOG_ERR, "nd6_ns_input: tgt=%s\n", ip6_sprintf(&taddr6));
+ nd6log((LOG_ERR, "nd6_ns_input: src=%s\n", ip6_sprintf(&saddr6)));
+ nd6log((LOG_ERR, "nd6_ns_input: dst=%s\n", ip6_sprintf(&daddr6)));
+ nd6log((LOG_ERR, "nd6_ns_input: tgt=%s\n", ip6_sprintf(&taddr6)));
+ icmp6stat.icp6s_badns++;
m_freem(m);
+ if (ifa != NULL)
+ ifafree(ifa);
}
/*
*
* Based on RFC 2461
* Based on RFC 2462 (duplicated address detection)
+ *
+ * Caller must bump up ln->ln_rt refcnt to make sure 'ln' doesn't go
+ * away if there is a llinfo_nd6 passed in.
*/
void
-nd6_ns_output(ifp, daddr6, taddr6, ln, dad)
- struct ifnet *ifp;
- struct in6_addr *daddr6, *taddr6;
- struct llinfo_nd6 *ln; /* for source address determination */
- int dad; /* duplicated address detection */
+nd6_ns_output(
+ struct ifnet *ifp,
+ const struct in6_addr *daddr6,
+ const struct in6_addr *taddr6,
+ struct llinfo_nd6 *ln, /* for source address determination */
+ int dad, /* duplicated address detection */
+ int locked)
{
struct mbuf *m;
struct ip6_hdr *ip6;
maxlen = sizeof(*ip6) + sizeof(*nd_ns);
maxlen += (sizeof(struct nd_opt_hdr) + ifp->if_addrlen + 7) & ~7;
if (max_linkhdr + maxlen >= MCLBYTES) {
-#ifdef DIAGNOSTIC
+#if DIAGNOSTIC
printf("nd6_ns_output: max_linkhdr + maxlen >= MCLBYTES "
"(%d + %d > %d)\n", max_linkhdr, maxlen, MCLBYTES);
#endif
return;
}
- MGETHDR(m, M_DONTWAIT, MT_DATA);
+ MGETHDR(m, M_DONTWAIT, MT_DATA); /* XXXMAC: mac_create_mbuf_linklayer() probably */
if (m && max_linkhdr + maxlen >= MHLEN) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
}
if (m == NULL)
return;
+ m->m_pkthdr.rcvif = NULL;
if (daddr6 == NULL || IN6_IS_ADDR_MULTICAST(daddr6)) {
m->m_flags |= M_MCAST;
icmp6len = sizeof(*nd_ns);
m->m_pkthdr.len = m->m_len = sizeof(*ip6) + icmp6len;
- m->m_data += max_linkhdr; /*or MH_ALIGN() equivalent?*/
+ m->m_data += max_linkhdr; /* or MH_ALIGN() equivalent? */
/* fill neighbor solicitation packet */
ip6 = mtod(m, struct ip6_hdr *);
* - saddr6 belongs to the outgoing interface.
* Otherwise, we perform a scope-wise match.
*/
- struct ip6_hdr *hip6; /*hold ip6*/
- struct in6_addr *saddr6;
-
- if (ln && ln->ln_hold) {
- hip6 = mtod(ln->ln_hold, struct ip6_hdr *);
- /* XXX pullup? */
- if (sizeof(*hip6) < ln->ln_hold->m_len)
- saddr6 = &hip6->ip6_src;
- else
- saddr6 = NULL;
- } else
- saddr6 = NULL;
- if (saddr6 && in6ifa_ifpwithaddr(ifp, saddr6))
- bcopy(saddr6, &ip6->ip6_src, sizeof(*saddr6));
- else {
+ struct ip6_hdr *hip6 = NULL; /* hold ip6 */
+ struct in6_addr saddr6;
+
+ /* Caller holds ref on this route */
+ if (ln != NULL) {
+ RT_LOCK(ln->ln_rt);
+ if (ln->ln_hold != NULL) {
+ hip6 = mtod(ln->ln_hold, struct ip6_hdr *);
+ /* XXX pullup? */
+ if (sizeof (*hip6) < ln->ln_hold->m_len)
+ saddr6 = hip6->ip6_src;
+ else
+ hip6 = NULL;
+ }
+ /*
+ * hip6 is used only to indicate whether or
+ * not there is a valid source address from
+ * the held packet in ln_hold. For obvious
+ * reasons we should not dereference it after
+ * releasing the lock though we can simply
+ * test if it's non-NULL.
+ */
+ RT_UNLOCK(ln->ln_rt);
+ }
+
+ if (ia != NULL)
+ ifafree(&ia->ia_ifa);
+ if (hip6 != NULL && (ia = in6ifa_ifpwithaddr(ifp, &saddr6))) {
+ bcopy(&saddr6, &ip6->ip6_src, sizeof (saddr6));
+ } else {
ia = in6_ifawithifp(ifp, &ip6->ip6_dst);
if (ia == NULL) {
- m_freem(m); /*XXX*/
+ if (ln != NULL) {
+ RT_LOCK(ln->ln_rt);
+ if (ln->ln_hold != NULL)
+ m_freem(ln->ln_hold);
+ ln->ln_hold = NULL;
+ RT_UNLOCK(ln->ln_rt);
+ }
+ m_freem(m);
return;
}
ip6->ip6_src = ia->ia_addr.sin6_addr;
}
+ if (ia != NULL) {
+ ifafree(&ia->ia_ifa);
+ ia = NULL;
+ }
#endif
} else {
/*
#if IPSEC
/* Don't lookup socket */
- ipsec_setsocket(m, NULL);
+ if (ipsec_bypass == 0)
+ (void)ipsec_setsocket(m, NULL);
#endif
- ip6_output(m, NULL, NULL, dad ? IPV6_DADOUTPUT : 0, &im6o, &outif);
+ ip6_output(m, NULL, NULL, dad ? IPV6_DADOUTPUT : 0, &im6o, &outif, locked);
if (outif) {
icmp6_ifstat_inc(outif, ifs6_out_msg);
icmp6_ifstat_inc(outif, ifs6_out_neighborsolicit);
* - anycast advertisement delay rule (RFC2461 7.2.7, SHOULD)
*/
void
-nd6_na_input(m, off, icmp6len)
- struct mbuf *m;
- int off, icmp6len;
+nd6_na_input(
+ struct mbuf *m,
+ int off,
+ int icmp6len)
{
struct ifnet *ifp = m->m_pkthdr.rcvif;
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
int is_override;
char *lladdr = NULL;
int lladdrlen = 0;
- struct ifaddr *ifa;
+ struct ifaddr *ifa = NULL;
struct llinfo_nd6 *ln;
struct rtentry *rt;
struct sockaddr_dl *sdl;
union nd_opts ndopts;
+ struct timeval timenow;
if (ip6->ip6_hlim != 255) {
- log(LOG_ERR,
- "nd6_na_input: invalid hlim %d\n", ip6->ip6_hlim);
- goto freeit;
+ nd6log((LOG_ERR,
+ "nd6_na_input: invalid hlim (%d) from %s to %s on %s\n",
+ ip6->ip6_hlim, ip6_sprintf(&ip6->ip6_src),
+ ip6_sprintf(&ip6->ip6_dst), if_name(ifp)));
+ goto bad;
}
#ifndef PULLDOWN_TEST
- IP6_EXTHDR_CHECK(m, off, icmp6len,);
+ IP6_EXTHDR_CHECK(m, off, icmp6len, return);
nd_na = (struct nd_neighbor_advert *)((caddr_t)ip6 + off);
#else
IP6_EXTHDR_GET(nd_na, struct nd_neighbor_advert *, m, off, icmp6len);
taddr6.s6_addr16[1] = htons(ifp->if_index);
if (IN6_IS_ADDR_MULTICAST(&taddr6)) {
- log(LOG_ERR,
+ nd6log((LOG_ERR,
"nd6_na_input: invalid target address %s\n",
- ip6_sprintf(&taddr6));
- goto freeit;
+ ip6_sprintf(&taddr6)));
+ goto bad;
}
if (IN6_IS_ADDR_MULTICAST(&daddr6))
if (is_solicited) {
- log(LOG_ERR,
- "nd6_na_input: a solicited adv is multicasted\n");
- goto freeit;
+ nd6log((LOG_ERR,
+ "nd6_na_input: a solicited adv is multicasted\n"));
+ goto bad;
}
icmp6len -= sizeof(*nd_na);
nd6_option_init(nd_na + 1, icmp6len, &ndopts);
if (nd6_options(&ndopts) < 0) {
- log(LOG_INFO, "nd6_na_input: invalid ND option, ignored\n");
+ nd6log((LOG_INFO,
+ "nd6_na_input: invalid ND option, ignored\n"));
+ /* nd6_options have incremented stats */
goto freeit;
}
goto freeit;
}
- /* Just for safety, maybe unnecessery. */
+ /* Just for safety, maybe unnecessary. */
if (ifa) {
log(LOG_ERR,
"nd6_na_input: duplicate IP6 address %s\n",
}
if (lladdr && ((ifp->if_addrlen + 2 + 7) & ~7) != lladdrlen) {
- log(LOG_INFO,
+ nd6log((LOG_INFO,
"nd6_na_input: lladdrlen mismatch for %s "
"(if %d, NA packet %d)\n",
- ip6_sprintf(&taddr6), ifp->if_addrlen, lladdrlen - 2);
+ ip6_sprintf(&taddr6), ifp->if_addrlen, lladdrlen - 2));
+ goto bad;
}
/*
* If no neighbor cache entry is found, NA SHOULD silently be discarded.
+ * Callee returns a locked route upon success.
*/
- rt = nd6_lookup(&taddr6, 0, ifp);
- if ((rt == NULL) ||
- ((ln = (struct llinfo_nd6 *)rt->rt_llinfo) == NULL) ||
- ((sdl = SDL(rt->rt_gateway)) == NULL))
+ if ((rt = nd6_lookup(&taddr6, 0, ifp, 0)) == NULL)
+ goto freeit;
+
+ RT_LOCK_ASSERT_HELD(rt);
+ if ((ln = rt->rt_llinfo) == NULL ||
+ (sdl = SDL(rt->rt_gateway)) == NULL) {
+ RT_REMREF_LOCKED(rt);
+ RT_UNLOCK(rt);
goto freeit;
+ }
+ getmicrotime(&timenow);
if (ln->ln_state == ND6_LLINFO_INCOMPLETE) {
/*
* If the link-layer has address, and no lladdr option came,
* discard the packet.
*/
- if (ifp->if_addrlen && !lladdr)
+ if (ifp->if_addrlen && !lladdr) {
+ RT_REMREF_LOCKED(rt);
+ RT_UNLOCK(rt);
goto freeit;
+ }
/*
* Record link-layer address, and update the state.
bcopy(lladdr, LLADDR(sdl), ifp->if_addrlen);
if (is_solicited) {
ln->ln_state = ND6_LLINFO_REACHABLE;
- if (ln->ln_expire)
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined(__APPLE__)
- ln->ln_expire = time.tv_sec +
-#else
- ln->ln_expire = time_second +
-#endif
- nd_ifinfo[rt->rt_ifp->if_index].reachable;
- } else
+ ln->ln_byhint = 0;
+ if (ln->ln_expire) {
+ lck_rw_lock_shared(nd_if_rwlock);
+ ln->ln_expire = rt_expiry(rt, timenow.tv_sec,
+ nd_ifinfo[rt->rt_ifp->if_index].reachable);
+ lck_rw_done(nd_if_rwlock);
+ }
+ } else {
ln->ln_state = ND6_LLINFO_STALE;
- ln->ln_router = is_router;
+ ln->ln_expire = rt_expiry(rt, timenow.tv_sec,
+ nd6_gctimer);
+ }
+ if ((ln->ln_router = is_router) != 0) {
+ /*
+ * This means a router's state has changed from
+ * non-reachable to probably reachable, and might
+ * affect the status of associated prefixes..
+ */
+ RT_UNLOCK(rt);
+ pfxlist_onlink_check(0);
+ RT_LOCK(rt);
+ }
} else {
int llchange;
* If state is REACHABLE, make it STALE.
* no other updates should be done.
*/
- if (ln->ln_state == ND6_LLINFO_REACHABLE)
+ if (ln->ln_state == ND6_LLINFO_REACHABLE) {
ln->ln_state = ND6_LLINFO_STALE;
+ ln->ln_expire = rt_expiry(rt, timenow.tv_sec,
+ nd6_gctimer);
+ }
+ RT_REMREF_LOCKED(rt);
+ RT_UNLOCK(rt);
goto freeit;
} else if (is_override /* (2a) */
|| (!is_override && (lladdr && !llchange)) /* (2b) */
*/
if (is_solicited) {
ln->ln_state = ND6_LLINFO_REACHABLE;
+ ln->ln_byhint = 0;
if (ln->ln_expire) {
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined(__APPLE__)
- ln->ln_expire = time.tv_sec +
-#else
- ln->ln_expire = time_second +
-#endif
- nd_ifinfo[ifp->if_index].reachable;
+ lck_rw_lock_shared(nd_if_rwlock);
+ ln->ln_expire =
+ rt_expiry(rt, timenow.tv_sec,
+ nd_ifinfo[ifp->if_index].reachable);
+ lck_rw_done(nd_if_rwlock);
}
} else {
- if (lladdr && llchange)
+ if (lladdr && llchange) {
ln->ln_state = ND6_LLINFO_STALE;
+ ln->ln_expire = rt_expiry(rt,
+ timenow.tv_sec, nd6_gctimer);
+ }
}
}
*/
struct nd_defrouter *dr;
struct in6_addr *in6;
- int s;
+ struct ifnet *rt_ifp = rt->rt_ifp;
in6 = &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr;
-#if __NetBSD__
- s = splsoftnet();
-#else
- s = splnet();
-#endif
- dr = defrouter_lookup(in6, rt->rt_ifp);
- if (dr)
- defrtrlist_del(dr);
- else if (!ip6_forwarding && ip6_accept_rtadv) {
- /*
- * Even if the neighbor is not in the default
- * router list, the neighbor may be used
- * as a next hop for some destinations
- * (e.g. redirect case). So we must
- * call rt6_flush explicitly.
- */
- rt6_flush(&ip6->ip6_src, rt->rt_ifp);
+
+ /*
+ * Lock to protect the default router list.
+ * XXX: this might be unnecessary, since this function
+ * is only called under the network software interrupt
+ * context. However, we keep it just for safety.
+ */
+ RT_UNLOCK(rt);
+ lck_mtx_lock(nd6_mutex);
+ dr = defrouter_lookup(in6, rt_ifp);
+ if (dr) {
+ defrtrlist_del(dr, 1);
+ lck_mtx_unlock(nd6_mutex);
+ }
+ else {
+ lck_mtx_unlock(nd6_mutex);
+ if (!ip6_forwarding && (ip6_accept_rtadv || (rt_ifp->if_eflags & IFEF_ACCEPT_RTADVD))) {
+ /*
+ * Even if the neighbor is not in the default
+ * router list, the neighbor may be used
+ * as a next hop for some destinations
+ * (e.g. redirect case). So we must
+ * call rt6_flush explicitly.
+ */
+ rt6_flush(&ip6->ip6_src, rt_ifp);
+ }
}
- splx(s);
+ RT_LOCK(rt);
}
ln->ln_router = is_router;
}
+ RT_LOCK_ASSERT_HELD(rt);
rt->rt_flags &= ~RTF_REJECT;
ln->ln_asked = 0;
- if (ln->ln_hold) {
-#if OLDIP6OUTPUT
- (*ifp->if_output)(ifp, ln->ln_hold, rt_key(rt), rt);
-#else
- nd6_output(ifp, ln->ln_hold,
- (struct sockaddr_in6 *)rt_key(rt), rt);
-#endif
- ln->ln_hold = 0;
+ if (ln->ln_hold != NULL) {
+ struct mbuf *n = ln->ln_hold;
+ ln->ln_hold = NULL;
+ /*
+ * we assume ifp is not a loopback here, so just set the 2nd
+ * argument as the 1st one.
+ */
+ RT_UNLOCK(rt);
+ nd6_output(ifp, ifp, n, (struct sockaddr_in6 *)rt_key(rt),
+ rt, 0);
+ RT_LOCK_SPIN(rt);
}
+ RT_REMREF_LOCKED(rt);
+ RT_UNLOCK(rt);
freeit:
m_freem(m);
+ if (ifa != NULL)
+ ifafree(ifa);
+ return;
+
+ bad:
+ icmp6stat.icp6s_badna++;
+ m_freem(m);
+ if (ifa != NULL)
+ ifafree(ifa);
}
/*
* - anycast advertisement delay rule (RFC2461 7.2.7, SHOULD)
*/
void
-nd6_na_output(ifp, daddr6, taddr6, flags, tlladdr, sdl0)
- struct ifnet *ifp;
- struct in6_addr *daddr6, *taddr6;
- u_long flags;
- int tlladdr; /* 1 if include target link-layer address */
- struct sockaddr *sdl0; /* sockaddr_dl (= proxy NA) or NULL */
+nd6_na_output(
+ struct ifnet *ifp,
+ const struct in6_addr *daddr6,
+ const struct in6_addr *taddr6,
+ uint32_t flags,
+ int tlladdr, /* 1 if include target link-layer address */
+ struct sockaddr *sdl0) /* sockaddr_dl (= proxy NA) or NULL */
{
struct mbuf *m;
struct ip6_hdr *ip6;
struct ip6_moptions im6o;
int icmp6len;
int maxlen;
- caddr_t mac;
+ caddr_t mac = NULL;
struct ifnet *outif = NULL;
/* estimate the size of message */
maxlen = sizeof(*ip6) + sizeof(*nd_na);
maxlen += (sizeof(struct nd_opt_hdr) + ifp->if_addrlen + 7) & ~7;
if (max_linkhdr + maxlen >= MCLBYTES) {
-#ifdef DIAGNOSTIC
+#if DIAGNOSTIC
printf("nd6_na_output: max_linkhdr + maxlen >= MCLBYTES "
"(%d + %d > %d)\n", max_linkhdr, maxlen, MCLBYTES);
#endif
return;
}
- MGETHDR(m, M_DONTWAIT, MT_DATA);
+ MGETHDR(m, M_DONTWAIT, MT_DATA); /* XXXMAC: mac_create_mbuf_linklayer() probably */
if (m && max_linkhdr + maxlen >= MHLEN) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
}
if (m == NULL)
return;
+ m->m_pkthdr.rcvif = NULL;
if (IN6_IS_ADDR_MULTICAST(daddr6)) {
m->m_flags |= M_MCAST;
icmp6len = sizeof(*nd_na);
m->m_pkthdr.len = m->m_len = sizeof(struct ip6_hdr) + icmp6len;
- m->m_data += max_linkhdr; /*or MH_ALIGN() equivalent?*/
+ m->m_data += max_linkhdr; /* or MH_ALIGN() equivalent? */
/* fill neighbor advertisement packet */
ip6 = mtod(m, struct ip6_hdr *);
return;
}
ip6->ip6_src = ia->ia_addr.sin6_addr;
+ ifafree(&ia->ia_ifa);
+ ia = NULL;
+
nd_na = (struct nd_neighbor_advert *)(ip6 + 1);
nd_na->nd_na_type = ND_NEIGHBOR_ADVERT;
nd_na->nd_na_code = 0;
* target lladdr option SHOULD NOT be included.
*/
if (tlladdr) {
- mac = NULL;
/*
* sdl0 != NULL indicates proxy NA. If we do proxy, use
* lladdr in sdl0. If we are not proxying (sending NA for
#if IPSEC
/* Don't lookup socket */
- ipsec_setsocket(m, NULL);
+ if (ipsec_bypass == 0)
+ (void)ipsec_setsocket(m, NULL);
#endif
- ip6_output(m, NULL, NULL, 0, &im6o, &outif);
+ ip6_output(m, NULL, NULL, 0, &im6o, &outif, 0);
if (outif) {
icmp6_ifstat_inc(outif, ifs6_out_msg);
icmp6_ifstat_inc(outif, ifs6_out_neighboradvert);
}
caddr_t
-nd6_ifptomac(ifp)
- struct ifnet *ifp;
+nd6_ifptomac(
+ struct ifnet *ifp)
{
- switch (ifp->if_type) {
- case IFT_ARCNET:
- case IFT_ETHER:
- case IFT_FDDI:
-#if __NetBSD__
- return LLADDR(ifp->if_sadl);
-#else
- return ((caddr_t)(ifp + 1));
-#endif
- break;
- default:
- return NULL;
- }
+ return ((caddr_t)ifnet_lladdr(ifp));
}
TAILQ_HEAD(dadq_head, dadq);
int dad_ns_ocount; /* NS sent so far */
int dad_ns_icount;
int dad_na_icount;
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- struct callout_handle dad_timer;
-#endif
};
static struct dadq_head dadq;
+static int dad_init = 0;
static struct dadq *
-nd6_dad_find(ifa)
- struct ifaddr *ifa;
+nd6_dad_find(
+ struct ifaddr *ifa)
{
struct dadq *dp;
-
+ lck_mtx_lock(dad6_mutex);
for (dp = dadq.tqh_first; dp; dp = dp->dad_list.tqe_next) {
- if (dp->dad_ifa == ifa)
+ if (dp->dad_ifa == ifa) {
+ lck_mtx_unlock(dad6_mutex);
return dp;
+ }
}
+ lck_mtx_unlock(dad6_mutex);
return NULL;
}
+#ifdef __APPLE__
+void
+nd6_dad_stoptimer(
+ struct ifaddr *ifa)
+{
+
+ untimeout((void (*)(void *))nd6_dad_timer, (void *)ifa);
+}
+#else
+static void
+nd6_dad_starttimer(
+ struct dadq *dp,
+ int ticks)
+{
+
+ callout_reset(&dp->dad_timer_ch, ticks,
+ (void (*)(void *))nd6_dad_timer, (void *)dp->dad_ifa);
+}
+
+static void
+nd6_dad_stoptimer(
+ struct dadq *dp)
+{
+
+ callout_stop(&dp->dad_timer_ch);
+}
+#endif
+
/*
* Start Duplicated Address Detection (DAD) for specified interface address.
*/
void
-nd6_dad_start(ifa, tick)
- struct ifaddr *ifa;
- int *tick; /* minimum delay ticks for IFF_UP event */
+nd6_dad_start(
+ struct ifaddr *ifa,
+ int *tick_delay) /* minimum delay ticks for IFF_UP event */
{
struct in6_ifaddr *ia = (struct in6_ifaddr *)ifa;
struct dadq *dp;
- static int dad_init = 0;
if (!dad_init) {
TAILQ_INIT(&dadq);
return;
}
bzero(dp, sizeof(*dp));
+ lck_mtx_lock(dad6_mutex);
TAILQ_INSERT_TAIL(&dadq, (struct dadq *)dp, dad_list);
+ lck_mtx_unlock(dad6_mutex);
-#if ND6_DEBUG
- log(LOG_DEBUG, "%s: starting DAD for %s\n", if_name(ifa->ifa_ifp),
- ip6_sprintf(&ia->ia_addr.sin6_addr));
-#endif
+ nd6log((LOG_DEBUG, "%s: starting DAD for %s\n", if_name(ifa->ifa_ifp),
+ ip6_sprintf(&ia->ia_addr.sin6_addr)));
/*
* Send NS packet for DAD, ip6_dad_count times.
* (re)initialization.
*/
dp->dad_ifa = ifa;
- ifa->ifa_refcnt++; /*just for safety*/
+ ifaref(ifa); /*just for safety*/
dp->dad_count = ip6_dad_count;
dp->dad_ns_icount = dp->dad_na_icount = 0;
dp->dad_ns_ocount = dp->dad_ns_tcount = 0;
- if (!tick) {
+ if (tick_delay == NULL) {
+ u_int32_t retrans;
nd6_dad_ns_output(dp, ifa);
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- dp->dad_timer =
-#endif
- timeout((void (*) __P((void *)))nd6_dad_timer, (void *)ifa,
- nd_ifinfo[ifa->ifa_ifp->if_index].retrans * hz / 1000);
+ lck_rw_lock_shared(nd_if_rwlock);
+ retrans = nd_ifinfo[ifa->ifa_ifp->if_index].retrans * hz / 1000;
+ lck_rw_done(nd_if_rwlock);
+ timeout((void (*)(void *))nd6_dad_timer, (void *)ifa, retrans);
} else {
int ntick;
- if (*tick == 0)
+ if (*tick_delay == 0)
ntick = random() % (MAX_RTR_SOLICITATION_DELAY * hz);
else
- ntick = *tick + random() % (hz / 2);
- *tick = ntick;
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- dp->dad_timer =
-#endif
- timeout((void (*) __P((void *)))nd6_dad_timer, (void *)ifa,
+ ntick = *tick_delay + random() % (hz / 2);
+ *tick_delay = ntick;
+ timeout((void (*)(void *))nd6_dad_timer, (void *)ifa,
ntick);
}
}
+/*
+ * terminate DAD unconditionally. used for address removals.
+ */
+void
+nd6_dad_stop(
+ struct ifaddr *ifa)
+{
+ struct dadq *dp;
+
+ if (!dad_init)
+ return;
+ dp = nd6_dad_find(ifa);
+ if (!dp) {
+ /* DAD wasn't started yet */
+ return;
+ }
+
+ untimeout((void (*)(void *))nd6_dad_timer, (void *)ifa);
+
+ lck_mtx_lock(dad6_mutex);
+ TAILQ_REMOVE(&dadq, (struct dadq *)dp, dad_list);
+ lck_mtx_unlock(dad6_mutex);
+ FREE(dp, M_IP6NDP);
+ dp = NULL;
+ ifafree(ifa);
+}
+
+
static void
-nd6_dad_timer(ifa)
- struct ifaddr *ifa;
+nd6_dad_timer(
+ struct ifaddr *ifa)
{
- int s;
struct in6_ifaddr *ia = (struct in6_ifaddr *)ifa;
struct dadq *dp;
-#ifdef __APPLE__
- boolean_t funnel_state;
- funnel_state = thread_set_funneled(TRUE);
-#endif
-#if __NetBSD__
- s = splsoftnet(); /*XXX*/
-#else
- s = splnet(); /*XXX*/
-#endif
-
/* Sanity check */
if (ia == NULL) {
log(LOG_ERR, "nd6_dad_timer: called with null parameter\n");
/* timeouted with IFF_{RUNNING,UP} check */
if (dp->dad_ns_tcount > dad_maxtry) {
- log(LOG_ERR, "%s: could not run DAD, driver problem?\n",
- if_name(ifa->ifa_ifp));
+ nd6log((LOG_INFO, "%s: could not run DAD, driver problem?\n",
+ if_name(ifa->ifa_ifp)));
+ lck_mtx_lock(dad6_mutex);
TAILQ_REMOVE(&dadq, (struct dadq *)dp, dad_list);
- _FREE(dp, M_IP6NDP);
+ lck_mtx_unlock(dad6_mutex);
+ FREE(dp, M_IP6NDP);
dp = NULL;
- IFAFREE(ifa);
+ ifafree(ifa);
goto done;
}
/* Need more checks? */
if (dp->dad_ns_ocount < dp->dad_count) {
+ u_int32_t retrans;
/*
* We have more NS to go. Send NS packet for DAD.
*/
nd6_dad_ns_output(dp, ifa);
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- dp->dad_timer =
-#endif
- timeout((void (*) __P((void *)))nd6_dad_timer, (void *)ifa,
- nd_ifinfo[ifa->ifa_ifp->if_index].retrans * hz / 1000);
+ lck_rw_lock_shared(nd_if_rwlock);
+ retrans = nd_ifinfo[ifa->ifa_ifp->if_index].retrans * hz / 1000;
+ lck_rw_done(nd_if_rwlock);
+ timeout((void (*)(void *))nd6_dad_timer, (void *)ifa, retrans);
} else {
/*
* We have transmitted sufficient number of DAD packets.
}
if (dp->dad_ns_icount) {
-#if 0 /*heuristics*/
+#if 0 /* heuristics */
/*
* if
* - we have sent many(?) DAD NS, and
*/
ia->ia6_flags &= ~IN6_IFF_TENTATIVE;
-#if ND6_DEBUG
- log(LOG_INFO,
+ nd6log((LOG_DEBUG,
"%s: DAD complete for %s - no duplicates found\n",
if_name(ifa->ifa_ifp),
- ip6_sprintf(&ia->ia_addr.sin6_addr));
-#endif
+ ip6_sprintf(&ia->ia_addr.sin6_addr)));
+ lck_mtx_lock(dad6_mutex);
TAILQ_REMOVE(&dadq, (struct dadq *)dp, dad_list);
- _FREE(dp, M_IP6NDP);
+ lck_mtx_unlock(dad6_mutex);
+ in6_post_msg(ia->ia_ifp, KEV_INET6_NEW_USER_ADDR, ia);
+ FREE(dp, M_IP6NDP);
dp = NULL;
- IFAFREE(ifa);
+ ifafree(ifa);
}
}
done:
- splx(s);
-#ifdef __APPLE__
- (void) thread_set_funneled(funnel_state);
-#endif
+ return;
}
void
-nd6_dad_duplicated(ifa)
- struct ifaddr *ifa;
+nd6_dad_duplicated(
+ struct ifaddr *ifa)
{
struct in6_ifaddr *ia = (struct in6_ifaddr *)ifa;
struct dadq *dp;
return;
}
- log(LOG_ERR, "%s: DAD detected duplicate IPv6 address %s: %d NS, "
- "%d NA\n", if_name(ifa->ifa_ifp),
- ip6_sprintf(&ia->ia_addr.sin6_addr),
- dp->dad_ns_icount, dp->dad_na_icount);
+ log(LOG_ERR, "%s: DAD detected duplicate IPv6 address %s: "
+ "NS in/out=%d/%d, NA in=%d\n",
+ if_name(ifa->ifa_ifp), ip6_sprintf(&ia->ia_addr.sin6_addr),
+ dp->dad_ns_icount, dp->dad_ns_ocount, dp->dad_na_icount);
ia->ia6_flags &= ~IN6_IFF_TENTATIVE;
ia->ia6_flags |= IN6_IFF_DUPLICATED;
/* We are done with DAD, with duplicated address found. (failure) */
- untimeout((void (*) __P((void *)))nd6_dad_timer, (void *)ifa
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- , dp->dad_timer
-#endif
- );
+ untimeout((void (*)(void *))nd6_dad_timer, (void *)ifa);
+
log(LOG_ERR, "%s: DAD complete for %s - duplicate found\n",
if_name(ifa->ifa_ifp), ip6_sprintf(&ia->ia_addr.sin6_addr));
log(LOG_ERR, "%s: manual intervention required\n",
if_name(ifa->ifa_ifp));
+ lck_mtx_lock(dad6_mutex);
TAILQ_REMOVE(&dadq, (struct dadq *)dp, dad_list);
- _FREE(dp, M_IP6NDP);
+ lck_mtx_unlock(dad6_mutex);
+ FREE(dp, M_IP6NDP);
dp = NULL;
- IFAFREE(ifa);
+ ifafree(ifa);
}
static void
-nd6_dad_ns_output(dp, ifa)
- struct dadq *dp;
- struct ifaddr *ifa;
+nd6_dad_ns_output(
+ struct dadq *dp,
+ struct ifaddr *ifa)
{
struct in6_ifaddr *ia = (struct in6_ifaddr *)ifa;
struct ifnet *ifp = ifa->ifa_ifp;
}
dp->dad_ns_ocount++;
- nd6_ns_output(ifp, NULL, &ia->ia_addr.sin6_addr, NULL, 1);
+ nd6_ns_output(ifp, NULL, &ia->ia_addr.sin6_addr, NULL, 1, 0);
}
static void
-nd6_dad_ns_input(ifa)
- struct ifaddr *ifa;
+nd6_dad_ns_input(
+ struct ifaddr *ifa)
{
struct in6_ifaddr *ia;
- struct ifnet *ifp;
- struct in6_addr *taddr6;
+ const struct in6_addr *taddr6;
struct dadq *dp;
int duplicate;
panic("ifa == NULL in nd6_dad_ns_input");
ia = (struct in6_ifaddr *)ifa;
- ifp = ifa->ifa_ifp;
taddr6 = &ia->ia_addr.sin6_addr;
duplicate = 0;
dp = nd6_dad_find(ifa);
- /*
- * If it is from myself, ignore this.
- */
- if (ifp && (ifp->if_flags & IFF_LOOPBACK))
- return;
-
/* Quickhack - completely ignore DAD NS packets */
if (dad_ignore_ns) {
- log(LOG_INFO, "nd6_dad_ns_input: ignoring DAD NS packet for "
+ nd6log((LOG_INFO,
+ "nd6_dad_ns_input: ignoring DAD NS packet for "
"address %s(%s)\n", ip6_sprintf(taddr6),
- if_name(ifa->ifa_ifp));
+ if_name(ifa->ifa_ifp)));
return;
}
}
static void
-nd6_dad_na_input(ifa)
- struct ifaddr *ifa;
+nd6_dad_na_input(
+ struct ifaddr *ifa)
{
struct dadq *dp;
projects / apple / xnu.git / blobdiff