bsd/netinet6/icmp6.c

29 /*	$FreeBSD: src/sys/netinet6/icmp6.c,v 1.6.2.6 2001/07/10 09:44:16 ume Exp $	*/
30 /*	$KAME: icmp6.c,v 1.211 2001/04/04 05:56:20 itojun Exp $	*/
121 #include <netinet/icmp6.h>
279 	struct icmp6_hdr *icmp6;
314 	 * - the Parameter Problem Message that can be allowed an icmp6 error
358 			 * informational) we must not send icmp6 error.
400 	icmp6 = (struct icmp6_hdr *)(nip6 + 1);
401 	icmp6->icmp6_type = type;
402 	icmp6->icmp6_code = code;
403 	icmp6->icmp6_pptr = htonl((u_int32_t)param);
436 	struct icmp6_hdr *icmp6, *nicmp6;
452 	 * Locate icmp6 structure in mbuf, and check
492 	icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off);
494 	IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6));
495 	if (icmp6 == NULL) {
500 	code = icmp6->icmp6_code;
505 		    icmp6->icmp6_type, sum, ip6_sprintf(&ip6->ip6_src)));
518 		switch (icmp6->icmp6_type) {
527 	icmp6stat.icp6s_inhist[icmp6->icmp6_type]++;
529 	if (icmp6->icmp6_type < ICMP6_INFOMSG_MASK)
532 	switch (icmp6->icmp6_type) {
607 		if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
653 			bcopy(icmp6, nicmp6, sizeof(struct icmp6_hdr));
696 		if (icmp6->icmp6_type == MLD_LISTENER_QUERY) /* XXX: ugly... */
701 		if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
745 		if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
774 		if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
797 		if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
820 		if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
843 		if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
866 		if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
891 		if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
898 		    icmp6->icmp6_type, ip6_sprintf(&ip6->ip6_src),
901 		if (icmp6->icmp6_type < ICMP6_ECHO_REQUEST) {
911 		if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
931 	if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
952 	struct icmp6_hdr *icmp6;
965 	icmp6 = (struct icmp6_hdr *)(mtod(m, caddr_t) + off);
967 	IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off,
968 		       sizeof(*icmp6) + sizeof(struct ip6_hdr));
969 	if (icmp6 == NULL) {
974 	eip6 = (struct ip6_hdr *)(icmp6 + 1);
984 		int icmp6type = icmp6->icmp6_type;
1115 		icmp6 = (struct icmp6_hdr *)(mtod(m, caddr_t) + off);
1117 		IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off,
1118 		    sizeof(*icmp6) + sizeof(struct ip6_hdr));
1119 		if (icmp6 == NULL) {
1133 		eip6 = (struct ip6_hdr *)(icmp6 + 1);
1156 		ip6cp.ip6c_icmp6 = icmp6;
1157 		ip6cp.ip6c_ip6 = (struct ip6_hdr *)(icmp6 + 1);
1164 			notifymtu = ntohl(icmp6->icmp6_mtu);
1189 	struct icmp6_hdr *icmp6 = ip6cp->ip6c_icmp6;
1191 	u_int mtu = ntohl(icmp6->icmp6_mtu);
2062 	struct icmp6_hdr *icmp6;
2068 	icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off);
2070 	IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6));
2071 	if (icmp6 == NULL) {
2102 		    && ICMP6_FILTER_WILLBLOCK(icmp6->icmp6_type,
2164  * OFF points to the icmp6 header, counted from the top of the mbuf.
2172 	struct icmp6_hdr *icmp6;
2230 	icmp6 = (struct icmp6_hdr *)(ip6 + 1);
2231 	type = icmp6->icmp6_type; /* keep type for statistics */
2232 	code = icmp6->icmp6_code; /* ditto. */
2327 	if (icmp6->icmp6_type == ICMP6_ECHO_REPLY && icmp6->icmp6_code == 0) {
2350 	icmp6->icmp6_cksum = 0;
2351 	icmp6->icmp6_cksum = in6_cksum(m, IPPROTO_ICMPV6,
2424 	 * don't update route by icmp6 redirect.
2464 	/* ip6->ip6_src must be equal to gw for icmp6->icmp6_reddst */
2555 			"(if %d, icmp6 packet %d): %s\n",
2646 	 * router on this interface, don't send icmp6 redirect.
2823 	 * compute the maximum size for icmp6 redirect header option.
3080 	struct icmp6_hdr *icmp6;
3117 		icmp6 = mtod(m, struct icmp6_hdr *);
3123 		if ((icmp6->icmp6_type == ICMP6_ECHO_REQUEST && icmp6->icmp6_code == 0) ||
3124 			(icmp6->icmp6_type == ICMP6_NI_QUERY &&
3125 			 (icmp6->icmp6_code == ICMP6_NI_SUBJ_IPV6 ||
3126 			  icmp6->icmp6_code == ICMP6_NI_SUBJ_FQDN))) {
3253  * Returns 0 if it is okay to send the icmp6 packet.
3254  * Returns 1 if the router SHOULD NOT send this icmp6 packet due to rate