usr.sbin/dvmrpd/igmp.c

34 int	 igmp_chksum(struct igmp_hdr *);
40 	struct igmp_hdr		 igmp_hdr;
54 	memset(&igmp_hdr, 0, sizeof(igmp_hdr));
55 	igmp_hdr.type = PKT_TYPE_MEMBER_QUERY;
59 		igmp_hdr.grp_addr = 0;
65 			igmp_hdr.max_resp_time = iface->query_resp_interval;
72 		igmp_hdr.grp_addr = group->addr.s_addr;
73 		igmp_hdr.max_resp_time = iface->last_member_query_interval;
76 	ibuf_add(buf, &igmp_hdr, sizeof(igmp_hdr));
92 	struct igmp_hdr	 igmp_hdr;
97 	if (len < sizeof(igmp_hdr)) {
103 	memcpy(&igmp_hdr, buf, sizeof(igmp_hdr));
104 	iface->recv_query_resp_interval = igmp_hdr.max_resp_time;
107 	if (igmp_chksum(&igmp_hdr) == -1) {
113 	if (src.s_addr < iface->addr.s_addr && igmp_hdr.grp_addr == 0) {
121 	if (iface->state == IF_STA_NONQUERIER && igmp_hdr.grp_addr != 0) {
123 		if (!IN_MULTICAST(ntohl(igmp_hdr.grp_addr))) {
129 		if ((group = group_list_add(iface, igmp_hdr.grp_addr))
139 	struct igmp_hdr	 igmp_hdr;
144 	if (len < sizeof(igmp_hdr)) {
150 	memcpy(&igmp_hdr, buf, sizeof(igmp_hdr));
153 	if (igmp_chksum(&igmp_hdr) == -1) {
160 	if (!IN_MULTICAST(ntohl(igmp_hdr.grp_addr))) {
166 	if ((group = group_list_add(iface, igmp_hdr.grp_addr)) == NULL)
191 	struct igmp_hdr	 igmp_hdr;
199 	if (len < sizeof(igmp_hdr)) {
205 	memcpy(&igmp_hdr, buf, sizeof(igmp_hdr));
208 	if (igmp_chksum(&igmp_hdr) == -1) {
215 	if (!IN_MULTICAST(ntohl(igmp_hdr.grp_addr))) {
221 	if ((group = group_list_find(iface, igmp_hdr.grp_addr)) != NULL) {
227 igmp_chksum(struct igmp_hdr *igmp_hdr)
231 	chksum = igmp_hdr->chksum;
232 	igmp_hdr->chksum = 0;
234 	if (chksum != in_cksum(igmp_hdr, sizeof(*igmp_hdr)))