-/* RFC 2710 */
-
-#ifdef ENABLE_MULTICAST
-static void route_membershipreport(node_t *source, vpn_packet_t *packet)
-{
- struct ip6_hdr ip6;
- struct icmp6_hdr icmp6;
- subnet_t *subnet, search = {0};
- uint16_t checksum;
-
- struct {
- struct in6_addr ip6_src; /* source address */
- struct in6_addr ip6_dst; /* destination address */
- uint32_t length;
- uint32_t next;
- } pseudo;
-
- cp();
-
- if(!checklength(source, packet, ether_size + ip6_size + icmp6_size + sizeof(ipv6_t)))
- return;
-
- if(source != myself) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Got membership report from %s (%s) while in router mode!"), source->name, source->hostname);
- return;
- }
-
- /* Copy headers from packet to structs on the stack */
-
- memcpy(&ip6, packet->data + ether_size, ip6_size);
- memcpy(&icmp6, packet->data + ether_size + ip6_size + 8, icmp6_size);
-
- /* Create pseudo header */
-
- pseudo.ip6_src = ip6.ip6_src;
- pseudo.ip6_dst = ip6.ip6_dst;
- pseudo.length = htonl(icmp6_size + sizeof(ipv6_t));
- pseudo.next = htonl(IPPROTO_ICMPV6);
-
- /* Generate checksum */
-
- checksum = inet_checksum(&pseudo, sizeof(pseudo), ~0);
- checksum = inet_checksum(&icmp6, icmp6_size, checksum);
- checksum = inet_checksum(packet->data + ether_size + ip6_size + 8 + icmp6_size, sizeof(ipv6_t), checksum);
-
- if(checksum) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Cannot route packet: checksum error for membership report"));
- return;
- }
-
- /* Check if the IPv6 address exists on the VPN */
-
- search.type = SUBNET_IPV6;
- search.net.ipv6.address = *(ipv6_t *)(packet->data + ether_size + ip6_size + 8 + icmp6_size);
- search.net.ipv6.prefixlength = 128;
- search.owner = myself;
-
- subnet = avl_search(myself->subnet_tree, &search);
-
- if(!subnet) {
- avl_node_t *node;
- connection_t *c;
-
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Learned new IPv6 multicast address %hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx"),
- ntohs(*(uint16_t *) &packet->data[70]),
- ntohs(*(uint16_t *) &packet->data[72]),
- ntohs(*(uint16_t *) &packet->data[74]),
- ntohs(*(uint16_t *) &packet->data[76]),
- ntohs(*(uint16_t *) &packet->data[78]),
- ntohs(*(uint16_t *) &packet->data[80]),
- ntohs(*(uint16_t *) &packet->data[82]),
- ntohs(*(uint16_t *) &packet->data[84]));
-
- subnet = new_subnet();
- subnet->type = SUBNET_IPV6;
- subnet->net.ipv6.address = *(ipv6_t *)(packet->data + ether_size + ip6_size + 8 + icmp6_size);
- subnet->net.ipv6.prefixlength = 128;
- subnet->expires = now + multicastexpire;
- subnet_add(myself, subnet);
-
- /* And tell all other tinc daemons it's ours */
-
- for(node = connection_tree->head; node; node = node->next) {
- c = node->data;
- if(c->status.active)
- send_add_subnet(c, subnet);
- }
- }
-
- if(subnet->expires)
- subnet->expires = now + multicastexpire;
-}
-#endif
-