void terminate_connection(connection_t *c, bool report) {
logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Closing connection with %s (%s)", c->name, c->hostname);
- if(c->node && c->node->connection == c)
- c->node->connection = NULL;
+ if(c->node) {
+ if(c->node->connection == c)
+ c->node->connection = NULL;
- if(c->edge) {
- if(report && !tunnelserver)
- send_del_edge(everyone, c->edge);
+ if(c->edge) {
+ if(report && !tunnelserver)
+ send_del_edge(everyone, c->edge);
- edge_del(c->edge);
- c->edge = NULL;
+ edge_del(c->edge);
+ c->edge = NULL;
- /* Run MST and SSSP algorithms */
+ /* Run MST and SSSP algorithms */
- graph();
+ graph();
- /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
+ /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
- if(report && !c->node->status.reachable) {
- edge_t *e;
- e = lookup_edge(c->node, myself);
- if(e) {
- if(!tunnelserver)
- send_del_edge(everyone, e);
- edge_del(e);
+ if(report && !c->node->status.reachable) {
+ edge_t *e;
+ e = lookup_edge(c->node, myself);
+ if(e) {
+ if(!tunnelserver)
+ send_del_edge(everyone, e);
+ edge_del(e);
+ }
}
}
}
bool close_all_connections = false;
/*
- timeout_hanlder will start after 30 seconds from start of tincd
+ timeout_handler will start after 30 seconds from start of tincd
hold information about the elapsed time since last time the handler
has been run
*/
last_periodic_run_time = now;
for list_each(connection_t, c, connection_list) {
+ // control connections (eg. tinc ctl) do not have any timeout
if(c->status.control)
continue;
continue;
}
- if(c->last_ping_time + pingtimeout <= now.tv_sec) {
- if(c->edge) {
- try_tx(c->node, false);
- if(c->status.pinged) {
- logger(DEBUG_CONNECTIONS, LOG_INFO, "%s (%s) didn't respond to PING in %ld seconds", c->name, c->hostname, (long)(now.tv_sec - c->last_ping_time));
- } else if(c->last_ping_time + pinginterval <= now.tv_sec) {
- send_ping(c);
- continue;
- } else {
- continue;
- }
- } else {
- if(c->status.connecting)
- logger(DEBUG_CONNECTIONS, LOG_WARNING, "Timeout while connecting to %s (%s)", c->name, c->hostname);
- else
- logger(DEBUG_CONNECTIONS, LOG_WARNING, "Timeout from %s (%s) during authentication", c->name, c->hostname);
- }
+ // Bail out early if we haven't reached the ping timeout for this node yet
+ if(c->last_ping_time + pingtimeout > now.tv_sec)
+ continue;
+
+ // timeout during connection establishing
+ if(!c->edge) {
+ if(c->status.connecting)
+ logger(DEBUG_CONNECTIONS, LOG_WARNING, "Timeout while connecting to %s (%s)", c->name, c->hostname);
+ else
+ logger(DEBUG_CONNECTIONS, LOG_WARNING, "Timeout from %s (%s) during authentication", c->name, c->hostname);
+
terminate_connection(c, c->edge);
+ continue;
+ }
+
+ // helps in UDP holepunching
+ try_tx(c->node, false);
+
+ // timeout during ping
+ if(c->status.pinged) {
+ logger(DEBUG_CONNECTIONS, LOG_INFO, "%s (%s) didn't respond to PING in %ld seconds", c->name, c->hostname, (long)(now.tv_sec - c->last_ping_time));
+ terminate_connection(c, c->edge);
+ continue;
}
+ // check whether we need to send a new ping
+ if(c->last_ping_time + pinginterval <= now.tv_sec)
+ send_ping(c);
}
timeout_set(data, &(struct timeval){1, rand() % 100000});