X-Git-Url: http://git.meshlink.io/?p=meshlink;a=blobdiff_plain;f=src%2Fgraph.c;h=18376c14956a619a9e99441365fd44c42a7cfa18;hp=5afa7c32526509a31b610e8153d26c4c41a87829;hb=529b8fab8c21e7ae5af91d742ff202eab38e51f3;hpb=5f79c2c0882e03648acb9c4a2f6780a7513c61aa

diff --git a/src/graph.c b/src/graph.c
index 5afa7c32..18376c14 100644
--- a/src/graph.c
+++ b/src/graph.c
@@ -136,7 +136,13 @@ static void sssp_bfs(meshlink_handle_t *mesh) {
 static void check_reachability(meshlink_handle_t *mesh) {
 	/* Check reachability status. */
 
+	int reachable = -1; /* Don't count ourself */
+
 	for splay_each(node_t, n, mesh->nodes) {
+		if(n->status.visited) {
+			reachable++;
+		}
+
 		/* Check for nodes that have changed session_id */
 		if(n->status.visited && n->prevedge && n->prevedge->reverse->session_id != n->session_id) {
 			n->session_id = n->prevedge->reverse->session_id;
@@ -207,6 +213,20 @@ static void check_reachability(meshlink_handle_t *mesh) {
 			}
 		}
 	}
+
+	if(mesh->reachable != reachable) {
+		if(!reachable) {
+			mesh->last_unreachable = mesh->loop.now.tv_sec;
+
+			if(mesh->threadstarted) {
+				timeout_set(&mesh->loop, &mesh->periodictimer, &(struct timeval) {
+					0, prng(mesh, TIMER_FUDGE)
+				});
+			}
+		}
+
+		mesh->reachable = reachable;
+	}
 }
 
 void graph(meshlink_handle_t *mesh) {