Add new flag SPLIT_HORIZON.

message.c

@@ -894,7 +894,7 @@ flushupdates(struct network *net)
                 if(metric < INFINITY)
                     satisfy_request(route->src->prefix, route->src->plen,
                                     seqno, route->src->id, net);
-                if(split_horizon && (net->flags & NET_WIRED) &&
+                if((net->flags & NET_SPLIT_HORIZON) &&
                    route->neigh->network == net)
                     continue;
                 really_send_update(net, route->src->id,

network.c

@@ -262,6 +262,8 @@ network_up(struct network *net, int up)
         if(wired) {
             net->flags |= NET_WIRED;
             net->cost = 96;
+            if(split_horizon)
+                net->flags |= NET_SPLIT_HORIZON;
         } else {
             net->flags &= ~NET_WIRED;
             net->cost = 256;

network.h

@@ -34,6 +34,7 @@ struct network_conf {
 
 #define NET_UP (1 << 0)
 #define NET_WIRED (1<<1)
+#define NET_SPLIT_HORIZON (1 << 2)
 
 struct network {
     struct network *next;