+ if(!subnet)
+ {
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ {
+ syslog(LOG_WARNING, _("Cannot route packet: unknown IPv6 destination address %hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx"),
+ ntohs(*(short unsigned int *)&packet->data[38]),
+ ntohs(*(short unsigned int *)&packet->data[40]),
+ ntohs(*(short unsigned int *)&packet->data[42]),
+ ntohs(*(short unsigned int *)&packet->data[44]),
+ ntohs(*(short unsigned int *)&packet->data[46]),
+ ntohs(*(short unsigned int *)&packet->data[48]),
+ ntohs(*(short unsigned int *)&packet->data[50]),
+ ntohs(*(short unsigned int *)&packet->data[52]));
+ }
+
+ return NULL;
+ }
+cp
+ return subnet->owner;
+}
+
+void route_arp(vpn_packet_t *packet)
+{
+ struct ether_arp *arp;
+ subnet_t *subnet;
+ unsigned char ipbuf[4];
+cp
+ /* First, snatch the source address from the ARP packet */
+
+ memcpy(mymac.net.mac.address.x, packet->data + 6, 6);
+
+ /* This routine generates replies to ARP requests.
+ You don't need to set NOARP flag on the interface anymore (which is broken on FreeBSD).
+ Most of the code here is taken from choparp.c by Takamichi Tateoka (tree@mma.club.uec.ac.jp)
+ */
+
+ arp = (struct ether_arp *)(packet->data + 14);
+
+ /* Check if this is a valid ARP request */
+
+ if(ntohs(arp->arp_hrd) != ARPHRD_ETHER ||
+ ntohs(arp->arp_pro) != ETHERTYPE_IP ||
+ (int) (arp->arp_hln) != ETHER_ADDR_LEN ||
+ (int) (arp->arp_pln) != 4 ||
+ ntohs(arp->arp_op) != ARPOP_REQUEST )
+ {
+ if(debug_lvl > DEBUG_TRAFFIC)
+ {
+ syslog(LOG_WARNING, _("Cannot route packet: received unknown type ARP request"));
+ }
+ return;
+ }
+
+ /* Check if the IP address exists on the VPN */
+
+ subnet = lookup_subnet_ipv4((ipv4_t *)arp->arp_tpa);
+
+ if(!subnet)