X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fnet.c;h=10a2d20645951081fef4c68e70fdf4e97f8df111;hb=8ac096b5bf9da1b3961a3ac4a03d083629222a63;hp=7d44d17c378f0bbbf2821bd6b4432dd43f5d6705;hpb=886a6f61a1f4cc48a77b42d10f34f9126377d904;p=tinc diff --git a/src/net.c b/src/net.c index 7d44d17c..10a2d206 100644 --- a/src/net.c +++ b/src/net.c @@ -1,8 +1,9 @@ /* net.c -- most of the network code Copyright (C) 1998-2005 Ivo Timmermans, - 2000-2010 Guus Sliepen + 2000-2011 Guus Sliepen 2006 Scott Lamb + 2011 Loïc Grenié 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 @@ -38,6 +39,7 @@ int contradicting_add_edge = 0; int contradicting_del_edge = 0; +static int sleeptime = 10; /* Purge edges and subnets of unreachable nodes. Use carefully. */ @@ -47,7 +49,7 @@ void purge(void) { 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. */ @@ -56,13 +58,12 @@ void purge(void) { 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); } @@ -71,7 +72,7 @@ void purge(void) { enext = enode->next; e = enode->data; if(!tunnelserver) - send_del_edge(broadcast, e); + send_del_edge(everyone, e); edge_del(e); } } @@ -107,7 +108,7 @@ void purge(void) { - 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; @@ -115,12 +116,9 @@ void terminate_connection(connection_t *c, bool report) { 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); @@ -135,7 +133,7 @@ void terminate_connection(connection_t *c, bool report) { e = lookup_edge(c->node, myself); if(e) { if(!tunnelserver) - send_del_edge(broadcast, e); + send_del_edge(everyone, e); edge_del(e); } } @@ -166,25 +164,27 @@ static void timeout_handler(int fd, short events, void *event) { 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; } @@ -192,19 +192,21 @@ static void timeout_handler(int fd, short events, void *event) { } } - 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}); } @@ -221,7 +223,7 @@ void handle_meta_connection_data(int fd, short events, void *data) { 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); @@ -237,15 +239,21 @@ void handle_meta_connection_data(int fd, short events, void *data) { } 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; @@ -259,7 +267,7 @@ int reload_configuration(void) { 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; } @@ -269,6 +277,9 @@ int reload_configuration(void) { 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); @@ -303,14 +314,14 @@ int reload_configuration(void) { 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); } @@ -347,34 +358,38 @@ void retry(void) { */ 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;