Dump traffic statistics over control sockets.

src/control.c

@@ -113,6 +113,9 @@ bool control_h(connection_t *c, char *request) {
 			return control_return(c, REQ_DISCONNECT, found ? 0 : -2);
 		}
 
+		case REQ_DUMP_TRAFFIC:
+			return dump_traffic(c);
+
 		default:
 			return send_request(c, "%d %d", CONTROL, REQ_INVALID);
 	}

src/control_common.h

@@ -37,6 +37,7 @@ enum request_type {
 	REQ_RETRY,
 	REQ_CONNECT,
 	REQ_DISCONNECT,
+	REQ_DUMP_TRAFFIC,
 };
 
 #define TINC_CTL_VERSION_CURRENT 0

src/node.c

@@ -179,3 +179,16 @@ bool dump_nodes(connection_t *c) {
 
 	return send_request(c, "%d %d", CONTROL, REQ_DUMP_NODES);
 }
+
+bool dump_traffic(connection_t *c) {
+	splay_node_t *node;
+	node_t *n;
+
+	for(node = node_tree->head; node; node = node->next) {
+		n = node->data;
+		send_request(c, "%d %d %s %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64, CONTROL, REQ_DUMP_TRAFFIC,
+			   n->name, n->in_packets, n->in_bytes, n->out_packets, n->out_bytes);
+	}
+
+	return send_request(c, "%d %d", CONTROL, REQ_DUMP_TRAFFIC);
+}