/*
net.c -- most of the network code
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2010 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2011 Guus Sliepen <guus@tinc-vpn.org>
2006 Scott Lamb <slamb@slamb.org>
+ 2011 Loïc Grenié <loic.grenie@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
int contradicting_add_edge = 0;
int contradicting_del_edge = 0;
+static int sleeptime = 10;
/* Purge edges and subnets of unreachable nodes. Use carefully. */
edge_t *e;
subnet_t *s;
- ifdebug(PROTOCOL) logger(LOG_DEBUG, "Purging unreachable nodes");
+ logger(DEBUG_PROTOCOL, LOG_DEBUG, "Purging unreachable nodes");
/* Remove all edges and subnets owned by unreachable nodes. */
n = nnode->data;
if(!n->status.reachable) {
- ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Purging node %s (%s)", n->name,
- n->hostname);
+ logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Purging node %s (%s)", n->name, n->hostname);
for(snode = n->subnet_tree->head; snode; snode = snext) {
snext = snode->next;
s = snode->data;
- send_del_subnet(broadcast, s);
+ send_del_subnet(everyone, s);
if(!strictsubnets)
subnet_del(n, s);
}
enext = enode->next;
e = enode->data;
if(!tunnelserver)
- send_del_edge(broadcast, e);
+ send_del_edge(everyone, e);
edge_del(e);
}
}
- Deactivate the host
*/
void terminate_connection(connection_t *c, bool report) {
- ifdebug(CONNECTIONS) logger(LOG_NOTICE, "Closing connection with %s (%s)",
+ logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Closing connection with %s (%s)",
c->name, c->hostname);
c->status.active = false;
if(c->node)
c->node->connection = NULL;
- if(c->socket)
- closesocket(c->socket);
-
if(c->edge) {
if(report && !tunnelserver)
- send_del_edge(broadcast, c->edge);
+ send_del_edge(everyone, c->edge);
edge_del(c->edge);
e = lookup_edge(c->node, myself);
if(e) {
if(!tunnelserver)
- send_del_edge(broadcast, e);
+ send_del_edge(everyone, e);
edge_del(e);
}
}
next = node->next;
c = node->data;
- if(c->last_ping_time + pingtimeout < now) {
+ if(c->status.control)
+ continue;
+
+ 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",
+ logger(DEBUG_CONNECTIONS, LOG_INFO, "%s (%s) didn't respond to PING in %ld seconds",
c->name, c->hostname, now - c->last_ping_time);
terminate_connection(c, true);
continue;
- } else if(c->last_ping_time + pinginterval < now) {
+ } else if(c->last_ping_time + pinginterval <= now) {
send_ping(c);
}
} else {
if(c->status.connecting) {
- ifdebug(CONNECTIONS)
- logger(LOG_WARNING, "Timeout while connecting to %s (%s)", c->name, c->hostname);
+ logger(DEBUG_CONNECTIONS, LOG_WARNING, "Timeout while connecting to %s (%s)", c->name, c->hostname);
c->status.connecting = false;
closesocket(c->socket);
do_outgoing_connection(c);
} else {
- ifdebug(CONNECTIONS) logger(LOG_WARNING, "Timeout from %s (%s) during authentication", c->name, c->hostname);
+ logger(DEBUG_CONNECTIONS, LOG_WARNING, "Timeout from %s (%s) during authentication", c->name, c->hostname);
terminate_connection(c, false);
continue;
}
}
}
- if(contradicting_del_edge && contradicting_add_edge) {
- logger(LOG_WARNING, "Possible node with same Name as us!");
-
- if(rand() % 3 == 0) {
- logger(LOG_ERR, "Shutting down, check configuration of all nodes for duplicate Names!");
- event_loopexit(NULL);
- return;
- }
-
- contradicting_add_edge = 0;
- contradicting_del_edge = 0;
+ if(contradicting_del_edge > 100 && contradicting_add_edge > 100) {
+ logger(DEBUG_ALWAYS, LOG_WARNING, "Possible node with same Name as us! Sleeping %d seconds.", sleeptime);
+ usleep(sleeptime * 1000000LL);
+ sleeptime *= 2;
+ if(sleeptime < 0)
+ sleeptime = 3600;
+ } else {
+ sleeptime /= 2;
+ if(sleeptime < 10)
+ sleeptime = 10;
}
+ contradicting_add_edge = 0;
+ contradicting_del_edge = 0;
+
event_add(event, &(struct timeval){pingtimeout, 0});
}
if(!result)
finish_connecting(c);
else {
- ifdebug(CONNECTIONS) logger(LOG_DEBUG,
+ logger(DEBUG_CONNECTIONS, LOG_DEBUG,
"Error while connecting to %s (%s): %s",
c->name, c->hostname, sockstrerror(result));
closesocket(c->socket);
}
static void sigterm_handler(int signal, short events, void *data) {
- logger(LOG_NOTICE, "Got %s signal", strsignal(signal));
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(signal));
event_loopexit(NULL);
}
static void sighup_handler(int signal, short events, void *data) {
- logger(LOG_NOTICE, "Got %s signal", strsignal(signal));
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(signal));
+ reopenlogger();
reload_configuration();
}
+static void sigalrm_handler(int signal, short events, void *data) {
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(signal));
+ retry();
+}
+
int reload_configuration(void) {
connection_t *c;
splay_node_t *node, *next;
init_configuration(&config_tree);
if(!read_server_config()) {
- logger(LOG_ERR, "Unable to reread configuration file, exitting.");
+ logger(DEBUG_ALWAYS, LOG_ERR, "Unable to reread configuration file, exitting.");
event_loopexit(NULL);
return EINVAL;
}
for(node = connection_tree->head; node; node = next) {
c = node->data;
next = node->next;
+
+ if(c->status.control)
+ continue;
if(c->outgoing) {
free(c->outgoing->name);
next = node->next;
subnet = node->data;
if(subnet->expires == 1) {
- send_del_subnet(broadcast, subnet);
+ send_del_subnet(everyone, subnet);
if(subnet->owner->status.reachable)
subnet_update(subnet->owner, subnet, false);
subnet_del(subnet->owner, subnet);
} else if(subnet->expires == -1) {
subnet->expires = 0;
} else {
- send_add_subnet(broadcast, subnet);
+ send_add_subnet(everyone, subnet);
if(subnet->owner->status.reachable)
subnet_update(subnet->owner, subnet, true);
}
*/
int main_loop(void) {
struct event timeout_event;
- struct event sighup_event;
- struct event sigterm_event;
- struct event sigquit_event;
timeout_set(&timeout_event, timeout_handler, &timeout_event);
event_add(&timeout_event, &(struct timeval){pingtimeout, 0});
-#ifdef SIGHUP
+#ifndef HAVE_MINGW
+ struct event sighup_event;
+ struct event sigterm_event;
+ struct event sigquit_event;
+ struct event sigalrm_event;
+
signal_set(&sighup_event, SIGHUP, sighup_handler, NULL);
signal_add(&sighup_event, NULL);
-#endif
-#ifdef SIGTERM
signal_set(&sigterm_event, SIGTERM, sigterm_handler, NULL);
signal_add(&sigterm_event, NULL);
-#endif
-#ifdef SIGQUIT
signal_set(&sigquit_event, SIGQUIT, sigterm_handler, NULL);
signal_add(&sigquit_event, NULL);
+ signal_set(&sigalrm_event, SIGALRM, sigalrm_handler, NULL);
+ signal_add(&sigalrm_event, NULL);
#endif
if(event_loop(0) < 0) {
- logger(LOG_ERR, "Error while waiting for input: %s", strerror(errno));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while waiting for input: %s", strerror(errno));
return 1;
}
+#ifndef HAVE_MINGW
signal_del(&sighup_event);
signal_del(&sigterm_event);
signal_del(&sigquit_event);
+ signal_del(&sigalrm_event);
+#endif
+
event_del(&timeout_event);
return 0;
projects / tinc / blobdiff