X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet.c;h=8df87d6ef71e7e39b4aa2aa41b118a1a3fea5388;hp=d78770e12c7da38c38339eba8d88d92a714bed96;hb=d1cd3c81455ecb32149cbaa424b7870075b2b2fc;hpb=ce976717ea9756aa985699547fdbf132b694748d diff --git a/src/net.c b/src/net.c index d78770e1..8df87d6e 100644 --- a/src/net.c +++ b/src/net.c @@ -1,7 +1,9 @@ /* net.c -- most of the network code Copyright (C) 1998-2005 Ivo Timmermans, - 2000-2006 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 @@ -13,17 +15,13 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - $Id$ + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "system.h" -#include - #include "utils.h" #include "splay_tree.h" #include "conf.h" @@ -39,17 +37,18 @@ #include "subnet.h" #include "xalloc.h" +int contradicting_add_edge = 0; +int contradicting_del_edge = 0; + /* Purge edges and subnets of unreachable nodes. Use carefully. */ -static void purge(void) { +void purge(void) { splay_node_t *nnode, *nnext, *enode, *enext, *snode, *snext; node_t *n; edge_t *e; subnet_t *s; - cp(); - - ifdebug(PROTOCOL) logger(LOG_DEBUG, _("Purging unreachable nodes")); + ifdebug(PROTOCOL) logger(LOG_DEBUG, "Purging unreachable nodes"); /* Remove all edges and subnets owned by unreachable nodes. */ @@ -58,15 +57,15 @@ static void purge(void) { n = nnode->data; if(!n->status.reachable) { - ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Purging node %s (%s)"), n->name, + ifdebug(SCARY_THINGS) logger(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; - if(!tunnelserver) - send_del_subnet(broadcast, s); - subnet_del(n, s); + send_del_subnet(broadcast, s); + if(!strictsubnets) + subnet_del(n, s); } for(enode = n->edge_tree->head; enode; enode = enext) { @@ -94,7 +93,8 @@ static void purge(void) { break; } - if(!enode) + if(!enode && (!strictsubnets || !n->subnet_tree->head)) + /* in strictsubnets mode do not delete nodes with subnets */ node_del(n); } } @@ -108,9 +108,7 @@ static void purge(void) { - Deactivate the host */ void terminate_connection(connection_t *c, bool report) { - cp(); - - ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Closing connection with %s (%s)"), + ifdebug(CONNECTIONS) logger(LOG_NOTICE, "Closing connection with %s (%s)", c->name, c->hostname); c->status.active = false; @@ -118,11 +116,6 @@ void terminate_connection(connection_t *c, bool report) { if(c->node) c->node->connection = NULL; - if(c->socket) - closesocket(c->socket); - - event_del(&c->ev); - if(c->edge) { if(report && !tunnelserver) send_del_edge(broadcast, c->edge); @@ -146,20 +139,12 @@ void terminate_connection(connection_t *c, bool report) { } } - free(c->outbuf); - c->outbuf = NULL; - c->outbuflen = 0; - c->outbufsize = 0; - c->outbufstart = 0; - /* Check if this was our outgoing connection */ - if(c->outgoing) { + if(c->outgoing) retry_outgoing(c->outgoing); - c->outgoing = NULL; - } else { - connection_del(c); - } + + connection_del(c); } /* @@ -175,31 +160,29 @@ static void timeout_handler(int fd, short events, void *event) { connection_t *c; time_t now = time(NULL); - cp(); - for(node = connection_tree->head; node; node = next) { next = node->next; c = node->data; - if(c->last_ping_time + pingtimeout < now) { + 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"), + 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); continue; - } else if(c->last_ping_time + pinginterval < now) { + } else if(c->last_ping_time + pinginterval <= now) { send_ping(c); } } else { - ifdebug(CONNECTIONS) logger(LOG_WARNING, _("Timeout from %s (%s) during authentication"), - c->name, c->hostname); if(c->status.connecting) { + ifdebug(CONNECTIONS) + logger(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); terminate_connection(c, false); continue; } @@ -207,24 +190,38 @@ 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; + } + event_add(event, &(struct timeval){pingtimeout, 0}); } void handle_meta_connection_data(int fd, short events, void *data) { connection_t *c = data; int result; - socklen_t len = sizeof(result); + socklen_t len = sizeof result; if(c->status.connecting) { + c->status.connecting = false; + getsockopt(c->socket, SOL_SOCKET, SO_ERROR, &result, &len); if(!result) finish_connecting(c); else { ifdebug(CONNECTIONS) logger(LOG_DEBUG, - _("Error while connecting to %s (%s): %s"), - c->name, c->hostname, strerror(result)); - c->status.connecting = false; + "Error while connecting to %s (%s): %s", + c->name, c->hostname, sockstrerror(result)); closesocket(c->socket); do_outgoing_connection(c); return; @@ -238,55 +235,27 @@ 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(LOG_NOTICE, "Got %s signal", strsignal(signal)); event_loopexit(NULL); } -static void sigint_handler(int signal, short events, void *data) { - static int saved_debug_level = -1; - - logger(LOG_NOTICE, _("Got %s signal"), strsignal(signal)); - - if(saved_debug_level != -1) { - logger(LOG_NOTICE, _("Reverting to old debug level (%d)"), - saved_debug_level); - debug_level = saved_debug_level; - saved_debug_level = -1; - } else { - logger(LOG_NOTICE, - _("Temporarily setting debug level to 5. Kill me with SIGINT again to go back to level %d."), - debug_level); - saved_debug_level = debug_level; - debug_level = 5; - } -} - -static void sigusr1_handler(int signal, short events, void *data) { - logger(LOG_NOTICE, _("Got %s signal"), strsignal(signal)); - dump_connections(); -} - -static void sigusr2_handler(int signal, short events, void *data) { - logger(LOG_NOTICE, _("Got %s signal"), strsignal(signal)); - dump_device_stats(); - dump_nodes(); - dump_edges(); - dump_subnets(); +static void sighup_handler(int signal, short events, void *data) { + logger(LOG_NOTICE, "Got %s signal", strsignal(signal)); + reopenlogger(); + reload_configuration(); } -static void sigwinch_handler(int signal, short events, void *data) { - logger(LOG_NOTICE, _("Got %s signal"), strsignal(signal)); - purge(); +static void sigalrm_handler(int signal, short events, void *data) { + logger(LOG_NOTICE, "Got %s signal", strsignal(signal)); + retry(); } -static void sighup_handler(int signal, short events, void *data) { +int reload_configuration(void) { connection_t *c; - splay_node_t *node; + splay_node_t *node, *next; char *fname; struct stat s; static time_t last_config_check = 0; - - logger(LOG_NOTICE, _("Got %s signal"), strsignal(signal)); /* Reread our own configuration file */ @@ -294,15 +263,16 @@ static void sighup_handler(int signal, short events, void *data) { init_configuration(&config_tree); if(!read_server_config()) { - logger(LOG_ERR, _("Unable to reread configuration file, exitting.")); + logger(LOG_ERR, "Unable to reread configuration file, exitting."); event_loopexit(NULL); - return; + return EINVAL; } /* Close connections to hosts that have a changed or deleted host config file */ - for(node = connection_tree->head; node; node = node->next) { + for(node = connection_tree->head; node; node = next) { c = node->data; + next = node->next; if(c->outgoing) { free(c->outgoing->name); @@ -312,7 +282,7 @@ static void sighup_handler(int signal, short events, void *data) { c->outgoing = NULL; } - asprintf(&fname, "%s/hosts/%s", confbase, c->name); + xasprintf(&fname, "%s/hosts/%s", confbase, c->name); if(stat(fname, &s) || s.st_mtime > last_config_check) terminate_connection(c, c->status.active); free(fname); @@ -320,14 +290,45 @@ static void sighup_handler(int signal, short events, void *data) { last_config_check = time(NULL); + /* If StrictSubnet is set, expire deleted Subnets and read new ones in */ + + if(strictsubnets) { + subnet_t *subnet; + + + for(node = subnet_tree->head; node; node = node->next) { + subnet = node->data; + subnet->expires = 1; + } + + load_all_subnets(); + + for(node = subnet_tree->head; node; node = next) { + next = node->next; + subnet = node->data; + if(subnet->expires == 1) { + send_del_subnet(broadcast, 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); + if(subnet->owner->status.reachable) + subnet_update(subnet->owner, subnet, true); + } + } + } + /* Try to make outgoing connections */ try_outgoing_connections(); -} -static void sigalrm_handler(int signal, short events, void *data) { - logger(LOG_NOTICE, _("Got %s signal"), strsignal(signal)); + return 0; +} +void retry(void) { connection_t *c; splay_node_t *node; @@ -350,49 +351,38 @@ static void sigalrm_handler(int signal, short events, void *data) { */ int main_loop(void) { struct event timeout_event; + + timeout_set(&timeout_event, timeout_handler, &timeout_event); + event_add(&timeout_event, &(struct timeval){pingtimeout, 0}); + +#ifndef HAVE_MINGW struct event sighup_event; - struct event sigint_event; struct event sigterm_event; struct event sigquit_event; - struct event sigusr1_event; - struct event sigusr2_event; - struct event sigwinch_event; struct event sigalrm_event; - cp(); - - timeout_set(&timeout_event, timeout_handler, &timeout_event); - event_add(&timeout_event, &(struct timeval){pingtimeout, 0}); signal_set(&sighup_event, SIGHUP, sighup_handler, NULL); signal_add(&sighup_event, NULL); - signal_set(&sigint_event, SIGINT, sigint_handler, NULL); - signal_add(&sigint_event, NULL); signal_set(&sigterm_event, SIGTERM, sigterm_handler, NULL); signal_add(&sigterm_event, NULL); signal_set(&sigquit_event, SIGQUIT, sigterm_handler, NULL); signal_add(&sigquit_event, NULL); - signal_set(&sigusr1_event, SIGUSR1, sigusr1_handler, NULL); - signal_add(&sigusr1_event, NULL); - signal_set(&sigusr2_event, SIGUSR2, sigusr2_handler, NULL); - signal_add(&sigusr2_event, NULL); - signal_set(&sigwinch_event, SIGWINCH, sigwinch_handler, NULL); - signal_add(&sigwinch_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(LOG_ERR, "Error while waiting for input: %s", strerror(errno)); return 1; } +#ifndef HAVE_MINGW signal_del(&sighup_event); - signal_del(&sigint_event); signal_del(&sigterm_event); signal_del(&sigquit_event); - signal_del(&sigusr1_event); - signal_del(&sigusr2_event); - signal_del(&sigwinch_event); signal_del(&sigalrm_event); +#endif + event_del(&timeout_event); return 0;