Make sure to send route requests when we loose a route.

route.c

@@ -101,7 +101,8 @@ flush_route(struct route *route)
             }
             send_update(route->dest, NULL);
         }
-        if(!new_route || new_route->metric >= INFINITY)
+        if(oldmetric < INFINITY &&
+           (!new_route || new_route->metric >= INFINITY))
             send_request(NULL, route->dest, max_hopcount, -1);
     }
 }
@@ -426,9 +427,15 @@ send_triggered_update(struct route *route, int oldmetric)
        (route->metric - oldmetric >= 256 || oldmetric - route->metric >= 256))
         send_update(route->dest, NULL);
 
-    if(route->metric - oldmetric >= 384) {
+    if(oldmetric < INFINITY) {
+        if(route->metric >= INFINITY) {
+            /* We just lost a route, request a new seqno from the source */
+            send_unicast_request(route->nexthop, route->dest,
+                                 max_hopcount, -1);
+        } else if(route->metric - oldmetric >= 384) {
             /* This route's metric has increased a lot -- let's hope we find
                something better */
             send_request(NULL, route->dest, 1, -1);
         }
+    }
 }