Make broadcast addresses configurable.

[tinc] / src / route.c

diff --git a/src/route.c b/src/route.c
index 00ba4c0..43d2697 100644 (file)
--- a/src/route.c
+++ b/src/route.c
@@ -371,7 +371,10 @@ static void fragment_ipv4_packet(node_t *dest, vpn_packet_t *packet, length_t et
        }
 }
 
-static void route_ipv4_unicast(node_t *source, vpn_packet_t *packet) {
+static void route_ipv4(node_t *source, vpn_packet_t *packet) {
+       if(!checklength(source, packet, ether_size + ip_size))
+               return;
+
        subnet_t *subnet;
        node_t *via;
        ipv4_t dest;
@@ -391,6 +394,11 @@ static void route_ipv4_unicast(node_t *source, vpn_packet_t *packet) {
                return;
        }
 
+       if (!subnet->owner) {
+               broadcast_packet(source, packet);
+               return;
+       }
+
        if(subnet->owner == source) {
                logger(DEBUG_TRAFFIC, LOG_WARNING, "Packet looping back to %s (%s)!", source->name, source->hostname);
                return;
@@ -432,20 +440,6 @@ static void route_ipv4_unicast(node_t *source, vpn_packet_t *packet) {
        send_packet(subnet->owner, packet);
 }
 
-static void route_ipv4(node_t *source, vpn_packet_t *packet) {
-       if(!checklength(source, packet, ether_size + ip_size))
-               return;
-
-       if(broadcast_mode && (((packet->data[30] & 0xf0) == 0xe0) || (
-                       packet->data[30] == 255 &&
-                       packet->data[31] == 255 &&
-                       packet->data[32] == 255 &&
-                       packet->data[33] == 255)))
-               broadcast_packet(source, packet);
-       else
-               route_ipv4_unicast(source, packet);
-}
-
 /* RFC 2463 */
 
 static void route_ipv6_unreachable(node_t *source, vpn_packet_t *packet, length_t ether_size, uint8_t type, uint8_t code) {
@@ -526,7 +520,17 @@ static void route_ipv6_unreachable(node_t *source, vpn_packet_t *packet, length_
        send_packet(source, packet);
 }
 
-static void route_ipv6_unicast(node_t *source, vpn_packet_t *packet) {
+static void route_neighborsol(node_t *source, vpn_packet_t *packet);
+
+static void route_ipv6(node_t *source, vpn_packet_t *packet) {
+       if(!checklength(source, packet, ether_size + ip6_size))
+               return;
+
+       if(packet->data[20] == IPPROTO_ICMPV6 && checklength(source, packet, ether_size + ip6_size + icmp6_size) && packet->data[54] == ND_NEIGHBOR_SOLICIT) {
+               route_neighborsol(source, packet);
+               return;
+       }
+
        subnet_t *subnet;
        node_t *via;
        ipv6_t dest;
@@ -550,6 +554,11 @@ static void route_ipv6_unicast(node_t *source, vpn_packet_t *packet) {
                return;
        }
 
+       if (!subnet->owner) {
+               broadcast_packet(source, packet);
+               return;
+       }
+
        if(subnet->owner == source) {
                logger(DEBUG_TRAFFIC, LOG_WARNING, "Packet looping back to %s (%s)!", source->name, source->hostname);
                return;
@@ -724,21 +733,6 @@ static void route_neighborsol(node_t *source, vpn_packet_t *packet) {
        send_packet(source, packet);
 }
 
-static void route_ipv6(node_t *source, vpn_packet_t *packet) {
-       if(!checklength(source, packet, ether_size + ip6_size))
-               return;
-
-       if(packet->data[20] == IPPROTO_ICMPV6 && checklength(source, packet, ether_size + ip6_size + icmp6_size) && packet->data[54] == ND_NEIGHBOR_SOLICIT) {
-               route_neighborsol(source, packet);
-               return;
-       }
-
-       if(broadcast_mode && packet->data[38] == 255)
-               broadcast_packet(source, packet);
-       else
-               route_ipv6_unicast(source, packet);
-}
-
 /* RFC 826 */
 
 static void route_arp(node_t *source, vpn_packet_t *packet) {
@@ -822,7 +816,7 @@ static void route_mac(node_t *source, vpn_packet_t *packet) {
        memcpy(&dest, &packet->data[0], sizeof dest);
        subnet = lookup_subnet_mac(NULL, &dest);
 
-       if(!subnet) {
+       if(!subnet || !subnet->owner) {
                broadcast_packet(source, packet);
                return;
        }