-#ifdef HAVE_NETINET_IP6_H
- if(!subnet->owner->status.reachable)
- route_ipv6_unreachable(packet, ICMP6_DST_UNREACH_NOROUTE);
-#endif
-
- return subnet->owner;
-}
-
-#ifdef HAVE_NETINET_IP6_H
-
-/* RFC 2461 */
-
-void route_neighborsol(vpn_packet_t *packet)
-{
- struct ip6_hdr *hdr;
- struct nd_neighbor_solicit *ns;
- struct nd_opt_hdr *opt;
- subnet_t *subnet;
- 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();
-
- hdr = (struct ip6_hdr *)(packet->data + 14);
- ns = (struct nd_neighbor_solicit *)(packet->data + 14 + sizeof(*hdr));
- opt = (struct nd_opt_hdr *)(packet->data + 14 + sizeof(*hdr) + sizeof(*ns));
-
- /* First, snatch the source address from the neighbor solicitation packet */
-
- if(overwrite_mac)
- memcpy(mymac.x, packet->data + 6, 6);
-
- /* Check if this is a valid neighbor solicitation request */
-
- if(ns->nd_ns_hdr.icmp6_type != ND_NEIGHBOR_SOLICIT ||
- opt->nd_opt_type != ND_OPT_SOURCE_LINKADDR) {
- if(debug_lvl > DEBUG_TRAFFIC) {
- syslog(LOG_WARNING, _("Cannot route packet: received unknown type neighbor solicitation request"));
- }
- return;
- }
-
- /* Create pseudo header */
-
- memcpy(&pseudo.ip6_src, &hdr->ip6_src, 16);
- memcpy(&pseudo.ip6_dst, &hdr->ip6_dst, 16);
- pseudo.length = htonl(sizeof(*ns) + sizeof(*opt) + 6);
- pseudo.next = htonl(IPPROTO_ICMPV6);
-
- /* Generate checksum */
-
- checksum = inet_checksum(&pseudo, sizeof(pseudo), ~0);
- checksum = inet_checksum(ns, sizeof(*ns) + 8, checksum);
-
- if(checksum) {
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_WARNING, _("Cannot route packet: checksum error for neighbor solicitation request"));
- return;
- }
-
- /* Check if the IPv6 address exists on the VPN */
-
- subnet = lookup_subnet_ipv6((ipv6_t *) & ns->nd_ns_target);
-
- if(!subnet) {
- if(debug_lvl >= DEBUG_TRAFFIC) {
- syslog(LOG_WARNING, _("Cannot route packet: neighbor solicitation request for unknown address %hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx"),
- ntohs(((uint16_t *) & ns->nd_ns_target)[0]),
- ntohs(((uint16_t *) & ns->nd_ns_target)[1]),
- ntohs(((uint16_t *) & ns->nd_ns_target)[2]),
- ntohs(((uint16_t *) & ns->nd_ns_target)[3]),
- ntohs(((uint16_t *) & ns->nd_ns_target)[4]),
- ntohs(((uint16_t *) & ns->nd_ns_target)[5]),
- ntohs(((uint16_t *) & ns->nd_ns_target)[6]),
- ntohs(((uint16_t *) & ns->nd_ns_target)[7]));
- }
-