-static void check_dead_connections(void) {
- avl_node_t *node, *next;
- connection_t *c;
-
- for(node = connection_tree->head; node; node = next) {
- next = node->next;
- c = node->data;
-
- if(c->last_ping_time + pingtimeout <= now) {
- if(c->status.active) {
- if(c->status.pinged) {
- ifdebug(CONNECTIONS) logger(LOG_INFO, "%s (%s) didn't respond to PING in %ld seconds",
- c->name, c->hostname, now - c->last_ping_time);
- c->status.timeout = true;
- terminate_connection(c, true);
- } else if(c->last_ping_time + pinginterval <= now) {
- send_ping(c);
- }
- } else {
- if(c->status.remove) {
- logger(LOG_WARNING, "Old connection_t for %s (%s) status %04x still lingering, deleting...",
- c->name, c->hostname, bitfield_to_int(&c->status, sizeof c->status));
- connection_del(c);
- continue;
- }
- ifdebug(CONNECTIONS) logger(LOG_WARNING, "Timeout from %s (%s) during authentication",
- c->name, c->hostname);
- if(c->status.connecting) {
- c->status.connecting = false;
- closesocket(c->socket);
- do_outgoing_connection(c);
- } else {
- terminate_connection(c, false);
- }
- }
- }
-
- if(c->outbuflen > 0 && c->last_flushed_time + pingtimeout <= now) {
- if(c->status.active) {
- ifdebug(CONNECTIONS) logger(LOG_INFO,
- "%s (%s) could not flush for %ld seconds (%d bytes remaining)",
- c->name, c->hostname, now - c->last_flushed_time, c->outbuflen);
- c->status.timeout = true;
- terminate_connection(c, true);
- }
- }
+static void timeout_handler(void *data) {
+
+ bool close_all_connections = false;
+
+ /*
+ 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
+ */
+ long sleep_time = now.tv_sec - last_periodic_run_time.tv_sec;
+
+ /*
+ It seems that finding sane default value is harder than expected
+ Since we send every second a UDP packet to make holepunching work
+ And default UDP state expire on firewalls is between 15-30 seconds
+ we drop all connections after 60 Seconds - UDPDiscoveryTimeout=30
+ by default
+ */
+ if(sleep_time > 2 * udp_discovery_timeout) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Awaking from dead after %ld seconds of sleep", sleep_time);
+ /*
+ Do not send any packets to tinc after we wake up.
+ The other node probably closed our connection but we still
+ are holding context information to them. This may happen on
+ laptops or any other hardware which can be suspended for some time.
+ Sending any data to node that wasn't expecting it will produce
+ annoying and misleading errors on the other side about failed signature
+ verification and or about missing sptps context
+ */
+ close_all_connections = true;