-#include "protocol.h"
-#include "device.h"
-
-#include "system.h"
-
-#ifndef ETHER_ADDR_LEN
- #define ETHER_ADDR_LEN 6
-#endif
-
-int routing_mode = RMODE_ROUTER;
-int priorityinheritance = 0;
-int macexpire = 600;
-subnet_t mymac;
-
-void learn_mac(mac_t *address)
-{
- subnet_t *subnet;
- avl_node_t *node;
- connection_t *c;
- cp();
- subnet = lookup_subnet_mac(address);
-
- /* If we don't know this MAC address yet, store it */
-
- if(!subnet || subnet->owner!=myself)
- {
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_INFO, _("Learned new MAC address %hx:%hx:%hx:%hx:%hx:%hx"),
- address->x[0], address->x[1], address->x[2], address->x[3], address->x[4], address->x[5]);
-
- subnet = new_subnet();
- subnet->type = SUBNET_MAC;
- memcpy(&subnet->net.mac.address, address, sizeof(mac_t));
- subnet_add(myself, subnet);
-
- /* And tell all other tinc daemons it's our MAC */
-
- for(node = connection_tree->head; node; node = node->next)
- {
- c = (connection_t *)node->data;
- if(c->status.active)
- send_add_subnet(c, subnet);
- }
- }
-
- subnet->net.mac.lastseen = now;
-}
-
-void age_mac(void)
-{
- subnet_t *s;
- connection_t *c;
- avl_node_t *node, *next, *node2;
- cp();
- for(node = myself->subnet_tree->head; node; node = next)
- {
- next = node->next;
- s = (subnet_t *)node->data;
- if(s->type == SUBNET_MAC && s->net.mac.lastseen && s->net.mac.lastseen + macexpire < now)
- {
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_INFO, _("MAC address %hx:%hx:%hx:%hx:%hx:%hx expired"),
- s->net.mac.address.x[0], s->net.mac.address.x[1], s->net.mac.address.x[2], s->net.mac.address.x[3], s->net.mac.address.x[4], s->net.mac.address.x[5]);
- for(node2 = connection_tree->head; node2; node2 = node2->next)
- {
- c = (connection_t *)node2->data;
- if(c->status.active)
- send_del_subnet(c, s);
- }
- subnet_del(myself, s);
- }
- }
- cp();
-}
-
-node_t *route_mac(vpn_packet_t *packet)
-{
- subnet_t *subnet;
- cp();
- /* Learn source address */
-
- learn_mac((mac_t *)(&packet->data[6]));
-
- /* Lookup destination address */
-
- subnet = lookup_subnet_mac((mac_t *)(&packet->data[0]));
-
- if(subnet)
- return subnet->owner;
- else
- return NULL;
-}
-
-node_t *route_ipv4(vpn_packet_t *packet)
-{
- subnet_t *subnet;
- cp();
- if(priorityinheritance)
- packet->priority = packet->data[15];
-
- subnet = lookup_subnet_ipv4((ipv4_t *)&packet->data[30]);
- cp();
- if(!subnet)
- {
- if(debug_lvl >= DEBUG_TRAFFIC)
- {
- syslog(LOG_WARNING, _("Cannot route packet: unknown IPv4 destination address %d.%d.%d.%d"),
- packet->data[30], packet->data[31], packet->data[32], packet->data[33]);
- }
-
- return NULL;
- }
- cp();
- return subnet->owner;
-}
-
-node_t *route_ipv6(vpn_packet_t *packet)
-{
- subnet_t *subnet;
- cp();
- subnet = lookup_subnet_ipv6((ipv6_t *)&packet->data[38]);
- cp();
- 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(*(uint16_t *)&packet->data[38]),
- ntohs(*(uint16_t *)&packet->data[40]),
- ntohs(*(uint16_t *)&packet->data[42]),
- ntohs(*(uint16_t *)&packet->data[44]),
- ntohs(*(uint16_t *)&packet->data[46]),
- ntohs(*(uint16_t *)&packet->data[48]),
- ntohs(*(uint16_t *)&packet->data[50]),
- ntohs(*(uint16_t *)&packet->data[52]));
- }
-
- return NULL;
- }
- cp();
- return subnet->owner;
-}
-
-uint16_t inet_checksum(uint16_t *data, int len, uint16_t prevsum)
-{
- uint32_t checksum = prevsum ^ 0xFFFF;
-
- while(len--)
- checksum += ntohs(*data++);
-
- while(checksum >> 16)
- checksum = (checksum & 0xFFFF) + (checksum >> 16);
-
- return checksum ^ 0xFFFF;
-}
-
-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;
- uint8_t junk[4];
- } 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 */