1/*-
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)ip_icmp.c 8.2 (Berkeley) 1/4/94
61 */
62
63#include <sys/cdefs.h>
64__FBSDID("$FreeBSD: head/sys/netinet6/icmp6.c 191672 2009-04-29 19:19:13Z bms $");
65
66#include "opt_inet.h"
67#include "opt_inet6.h"
68#include "opt_ipsec.h"
69#include "opt_route.h"
70
71#include <sys/param.h>
72#include <sys/domain.h>

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142
143
144void
145icmp6_init(void)
146{
147 INIT_VNET_INET6(curvnet);
148
149 V_icmp6errpps_count = 0;
150}
151
152static void
153icmp6_errcount(struct icmp6errstat *stat, int type, int code)
154{
155 switch (type) {
156 case ICMP6_DST_UNREACH:
157 switch (code) {

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422
423 ip6 = mtod(m, struct ip6_hdr *);
424 if (icmp6len < sizeof(struct icmp6_hdr)) {
425 ICMP6STAT_INC(icp6s_tooshort);
426 goto freeit;
427 }
428
429 /*
430 * Check multicast group membership.
431 * Note: SSM filters are not applied for ICMPv6 traffic.
432 */
433 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
434 struct ifnet *ifp;
435 struct in6_multi *inm;
436
437 ifp = m->m_pkthdr.rcvif;
438 inm = in6m_lookup(ifp, &ip6->ip6_dst);
439 if (inm == NULL) {
440 IP6STAT_INC(ip6s_notmember);
441 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
442 goto freeit;
443 }
444 }
445
446 /*
447 * calculate the checksum
448 */
449#ifndef PULLDOWN_TEST
450 icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off);
451#else
452 IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6));
453 if (icmp6 == NULL) {
454 ICMP6STAT_INC(icp6s_tooshort);

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625 case ICMP6_ECHO_REPLY:
626 icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_echoreply);
627 if (code != 0)
628 goto badcode;
629 break;
630
631 case MLD_LISTENER_QUERY:
632 case MLD_LISTENER_REPORT:
633 case MLD_LISTENER_DONE:
634 case MLDV2_LISTENER_REPORT:
635 /*
636 * Drop MLD traffic which is not link-local.
637 * XXX Should we also sanity check that these messages
638 * were directed to a link-local multicast prefix?
639 */
640 if (ip6->ip6_hlim != 1)
641 goto freeit;
642 if (mld_input(m, off, icmp6len) != 0)
643 return (IPPROTO_DONE);
644 /* m stays. */
645 break;
646
647 case ICMP6_WRUREQUEST: /* ICMP6_FQDN_QUERY */
648 {
649 enum { WRU, FQDN } mode;
650
651 if (!V_icmp6_nodeinfo)
652 break;
653
654 if (icmp6len == sizeof(struct icmp6_hdr) + 4)

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2046 if (opts)
2047 m_freem(opts);
2048 SOCKBUF_UNLOCK(&last->inp_socket->so_rcv);
2049 } else
2050 sorwakeup_locked(last->inp_socket);
2051 INP_RUNLOCK(last);
2052 } else {
2053 m_freem(m);
2054 IP6STAT_DEC(ip6s_delivered);
2055 }
2056 return IPPROTO_DONE;
2057}
2058
2059/*
2060 * Reflect the ip6 packet back to the source.
2061 * OFF points to the icmp6 header, counted from the top of the mbuf.
2062 */

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2218 m_freem(m);
2219 return;
2220}
2221
2222void
2223icmp6_fasttimo(void)
2224{
2225
2226 mld_fasttimo();
2227}
2228
2229void
2230icmp6_slowtimo(void)
2231{
2232
2233 mld_slowtimo();
2234}
2235
2236static const char *
2237icmp6_redirect_diag(struct in6_addr *src6, struct in6_addr *dst6,
2238 struct in6_addr *tgt6)
2239{
2240 static char buf[1024];
2241 char ip6bufs[INET6_ADDRSTRLEN];
2242 char ip6bufd[INET6_ADDRSTRLEN];
2243 char ip6buft[INET6_ADDRSTRLEN];

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