sys/netinet/igmp.c

81 #include <netinet/ip.h>
104 static int	igmp_input_v1_query(struct ifnet *, const struct ip *,
106 static int	igmp_input_v2_query(struct ifnet *, const struct ip *,
108 static int	igmp_input_v3_query(struct ifnet *, const struct ip *,
112 static int	igmp_input_v1_report(struct ifnet *, /*const*/ struct ip *,
114 static int	igmp_input_v2_report(struct ifnet *, /*const*/ struct ip *,
704 igmp_input_v1_query(struct ifnet *ifp, const struct ip *ip,
718 	if (!in_allhosts(ip->ip_dst) || !in_nullhost(igmp->igmp_group)) {
789 igmp_input_v2_query(struct ifnet *ifp, const struct ip *ip,
809 		if (!in_allhosts(ip->ip_dst))
941 igmp_input_v3_query(struct ifnet *ifp, const struct ip *ip,
1000 		if (!in_allhosts(ip->ip_dst) || nsrc > 0) {
1207 igmp_input_v1_report(struct ifnet *ifp, /*const*/ struct ip *ip,
1220 	    !in_hosteq(igmp->igmp_group, ip->ip_dst)) {
1232 	if (V_igmp_recvifkludge && in_nullhost(ip->ip_src)) {
1235 			ip->ip_src.s_addr = htonl(ia->ia_subnet);
1318 igmp_input_v2_report(struct ifnet *ifp, /*const*/ struct ip *ip,
1331 	if (ia != NULL && in_hosteq(ip->ip_src, IA_SIN(ia)->sin_addr)) {
1345 	    !in_hosteq(igmp->igmp_group, ip->ip_dst)) {
1359 	if (V_igmp_recvifkludge && in_nullhost(ip->ip_src)) {
1361 			ip->ip_src.s_addr = htonl(ia->ia_subnet);
1431 	struct ip *ip;
1445 	ip = mtod(m, struct ip *);
1447 	igmplen = ntohs(ip->ip_len) - iphlen;
1472 	ip = mtod(m, struct ip *);
1493 	if (igmp->igmp_type != IGMP_DVMRP && ip->ip_ttl != 1) {
1519 			if (igmp_input_v1_query(ifp, ip, igmp) != 0) {
1529 			if (igmp_input_v2_query(ifp, ip, igmp) != 0) {
1565 				if (igmp_input_v3_query(ifp, ip, igmpv3) != 0) {
1577 		if (igmp_input_v1_report(ifp, ip, igmp) != 0) {
1588 		if (igmp_input_v2_report(ifp, ip, igmp) != 0) {
2198 	struct ip		*ip;
2209 	M_ALIGN(m, sizeof(struct ip) + sizeof(struct igmp));
2211 	m->m_pkthdr.len = sizeof(struct ip) + sizeof(struct igmp);
2213 	m->m_data += sizeof(struct ip);
2223 	m->m_data -= sizeof(struct ip);
2224 	m->m_len += sizeof(struct ip);
2226 	ip = mtod(m, struct ip *);
2227 	ip->ip_tos = 0;
2228 	ip->ip_len = htons(sizeof(struct ip) + sizeof(struct igmp));
2229 	ip->ip_off = 0;
2230 	ip->ip_p = IPPROTO_IGMP;
2231 	ip->ip_src.s_addr = INADDR_ANY;
2234 		ip->ip_dst.s_addr = htonl(INADDR_ALLRTRS_GROUP);
2236 		ip->ip_dst = inm->inm_addr;
3497 	struct ip		*ip;
3504 	hdrlen = sizeof(struct ip) + sizeof(struct igmp_report);
3517 	m->m_data += sizeof(struct ip);
3518 	m->m_len -= sizeof(struct ip);
3529 	m->m_data -= sizeof(struct ip);
3530 	m->m_len += sizeof(struct ip);
3532 	ip = mtod(m, struct ip *);
3533 	ip->ip_tos = IPTOS_PREC_INTERNETCONTROL;
3534 	ip->ip_len = htons(hdrlen + igmpreclen);
3535 	ip->ip_off = htons(IP_DF);
3536 	ip->ip_p = IPPROTO_IGMP;
3537 	ip->ip_sum = 0;
3539 	ip->ip_src.s_addr = INADDR_ANY;
3546 			ip->ip_src = ia->ia_addr.sin_addr;
3551 	ip->ip_dst.s_addr = htonl(INADDR_ALLRPTS_GROUP);