X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fnet.c;h=f8ffbe346ce168e511aa4b32fab0847d97d4ba82;hb=d917c8cb6b69475d568ccbe82389b9f2b3eb5e80;hp=336bf9eec312bcc381751fd5d2fba8c8306d078a;hpb=36623e15a1c8685e5d8730345c1a7f9c93710fef;p=tinc diff --git a/src/net.c b/src/net.c index 336bf9ee..f8ffbe34 100644 --- a/src/net.c +++ b/src/net.c @@ -1,9 +1,9 @@ /* net.c -- most of the network code Copyright (C) 1998-2005 Ivo Timmermans, - 2000-2011 Guus Sliepen + 2000-2012 Guus Sliepen 2006 Scott Lamb - 2011 Loïc Grenié + 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 @@ -23,7 +23,6 @@ #include "system.h" #include "utils.h" -#include "splay_tree.h" #include "conf.h" #include "connection.h" #include "device.h" @@ -40,38 +39,26 @@ int contradicting_add_edge = 0; int contradicting_del_edge = 0; static int sleeptime = 10; +time_t last_config_check = 0; /* Purge edges and subnets of unreachable nodes. Use carefully. */ void purge(void) { - splay_node_t *nnode, *nnext, *enode, *enext, *snode, *snext; - node_t *n; - 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. */ - for(nnode = node_tree->head; nnode; nnode = nnext) { - nnext = nnode->next; - n = nnode->data; - + for splay_each(node_t, n, node_tree) { 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; + for splay_each(subnet_t, s, n->subnet_tree) { send_del_subnet(everyone, s); if(!strictsubnets) subnet_del(n, s); } - for(enode = n->edge_tree->head; enode; enode = enext) { - enext = enode->next; - e = enode->data; + for splay_each(edge_t, e, n->edge_tree) { if(!tunnelserver) send_del_edge(everyone, e); edge_del(e); @@ -81,20 +68,13 @@ void purge(void) { /* Check if anyone else claims to have an edge to an unreachable node. If not, delete node. */ - for(nnode = node_tree->head; nnode; nnode = nnext) { - nnext = nnode->next; - n = nnode->data; - + for splay_each(node_t, n, node_tree) { if(!n->status.reachable) { - for(enode = edge_weight_tree->head; enode; enode = enext) { - enext = enode->next; - e = enode->data; - + for splay_each(edge_t, e, edge_weight_tree) if(e->to == n) - break; - } + return; - if(!enode && (!strictsubnets || !n->subnet_tree->head)) + if(!strictsubnets || !n->subnet_tree->head) /* in strictsubnets mode do not delete nodes with subnets */ node_del(n); } @@ -103,18 +83,17 @@ void purge(void) { /* Terminate a connection: - - Close the socket - - Remove associated edge and tell other connections about it if report = true + - Mark it as inactive + - Remove the edge representing this connection + - Kill it with fire - Check if we need to retry making an outgoing connection - - Deactivate the host */ void terminate_connection(connection_t *c, bool report) { - ifdebug(CONNECTIONS) logger(LOG_NOTICE, "Closing connection with %s (%s)", - c->name, c->hostname); + logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Closing connection with %s (%s)", c->name, c->hostname); c->status.active = false; - if(c->node) + if(c->node && c->node->connection == c) c->node->connection = NULL; if(c->edge) { @@ -122,6 +101,7 @@ void terminate_connection(connection_t *c, bool report) { send_del_edge(everyone, c->edge); edge_del(c->edge); + c->edge = NULL; /* Run MST and SSSP algorithms */ @@ -140,12 +120,13 @@ void terminate_connection(connection_t *c, bool report) { } } - /* Check if this was our outgoing connection */ + outgoing_t *outgoing = c->outgoing; + connection_del(c); - if(c->outgoing) - retry_outgoing(c->outgoing); + /* Check if this was our outgoing connection */ - connection_del(c); + if(outgoing) + do_outgoing_connection(outgoing); } /* @@ -157,42 +138,34 @@ void terminate_connection(connection_t *c, bool report) { and close the connection. */ static void timeout_handler(int fd, short events, void *event) { - splay_node_t *node, *next; - connection_t *c; time_t now = time(NULL); - for(node = connection_tree->head; node; node = next) { - next = node->next; - c = node->data; + for list_each(connection_t, c, connection_list) { + 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", - c->name, c->hostname, now - c->last_ping_time); - terminate_connection(c, true); - continue; + logger(DEBUG_CONNECTIONS, LOG_INFO, "%s (%s) didn't respond to PING in %ld seconds", c->name, c->hostname, (long)now - c->last_ping_time); } 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); - c->status.connecting = false; - closesocket(c->socket); - do_outgoing_connection(c); + continue; } else { - ifdebug(CONNECTIONS) logger(LOG_WARNING, "Timeout from %s (%s) during authentication", c->name, c->hostname); - terminate_connection(c, false); 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); } + terminate_connection(c, c->status.active); } } if(contradicting_del_edge > 100 && contradicting_add_edge > 100) { - logger(LOG_WARNING, "Possible node with same Name as us! Sleeping %d seconds.", sleeptime); + logger(DEBUG_ALWAYS, LOG_WARNING, "Possible node with same Name as us! Sleeping %d seconds.", sleeptime); usleep(sleeptime * 1000000LL); sleeptime *= 2; if(sleeptime < 0) @@ -222,11 +195,8 @@ void handle_meta_connection_data(int fd, short events, void *data) { if(!result) finish_connecting(c); else { - ifdebug(CONNECTIONS) logger(LOG_DEBUG, - "Error while connecting to %s (%s): %s", - c->name, c->hostname, sockstrerror(result)); - closesocket(c->socket); - do_outgoing_connection(c); + logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Error while connecting to %s (%s): %s", c->name, c->hostname, sockstrerror(result)); + terminate_connection(c, false); return; } } @@ -238,27 +208,23 @@ 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(LOG_NOTICE, "Got %s signal", strsignal(signal)); + logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(signal)); retry(); } int reload_configuration(void) { - connection_t *c; - splay_node_t *node, *next; char *fname; - struct stat s; - static time_t last_config_check = 0; /* Reread our own configuration file */ @@ -266,49 +232,30 @@ 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; } - /* Close connections to hosts that have a changed or deleted host config file */ - - for(node = connection_tree->head; node; node = next) { - c = node->data; - next = node->next; - - if(c->outgoing) { - free(c->outgoing->name); - if(c->outgoing->ai) - freeaddrinfo(c->outgoing->ai); - free(c->outgoing); - c->outgoing = NULL; - } - - 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); - } + read_config_options(config_tree, NULL); - last_config_check = time(NULL); + xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, myself->name); + read_config_file(config_tree, fname); + free(fname); - /* If StrictSubnet is set, expire deleted Subnets and read new ones in */ + /* Parse some options that are allowed to be changed while tinc is running */ - if(strictsubnets) { - subnet_t *subnet; + setup_myself_reloadable(); + /* If StrictSubnet is set, expire deleted Subnets and read new ones in */ - for(node = subnet_tree->head; node; node = node->next) { - subnet = node->data; + if(strictsubnets) { + for splay_each(subnet_t, subnet, subnet_tree) subnet->expires = 1; - } load_all_subnets(); - for(node = subnet_tree->head; node; node = next) { - next = node->next; - subnet = node->data; + for splay_each(subnet_t, subnet, subnet_tree) { if(subnet->expires == 1) { send_del_subnet(everyone, subnet); if(subnet->owner->status.reachable) @@ -322,29 +269,75 @@ int reload_configuration(void) { subnet_update(subnet->owner, subnet, true); } } + } else { /* Only read our own subnets back in */ + for splay_each(subnet_t, subnet, myself->subnet_tree) + if(!subnet->expires) + subnet->expires = 1; + + config_t *cfg = lookup_config(config_tree, "Subnet"); + + while(cfg) { + subnet_t *subnet, *s2; + + if(!get_config_subnet(cfg, &subnet)) + continue; + + if((s2 = lookup_subnet(myself, subnet))) { + if(s2->expires == 1) + s2->expires = 0; + + free_subnet(subnet); + } else { + subnet_add(myself, subnet); + send_add_subnet(everyone, subnet); + subnet_update(myself, subnet, true); + } + + cfg = lookup_config_next(config_tree, cfg); + } + + for splay_each(subnet_t, subnet, myself->subnet_tree) { + if(subnet->expires == 1) { + send_del_subnet(everyone, subnet); + subnet_update(myself, subnet, false); + subnet_del(myself, subnet); + } + } } /* Try to make outgoing connections */ - + try_outgoing_connections(); + /* Close connections to hosts that have a changed or deleted host config file */ + + for list_each(connection_t, c, connection_list) { + if(c->status.control) + continue; + + xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name); + struct stat s; + if(stat(fname, &s) || s.st_mtime > last_config_check) { + logger(DEBUG_CONNECTIONS, LOG_INFO, "Host config file of %s has been changed", c->name); + terminate_connection(c, c->status.active); + } + free(fname); + } + + last_config_check = time(NULL); + return 0; } void retry(void) { - connection_t *c; - splay_node_t *node; - - for(node = connection_tree->head; node; node = node->next) { - c = node->data; - + for list_each(connection_t, c, connection_list) { if(c->outgoing && !c->node) { if(timeout_initialized(&c->outgoing->ev)) event_del(&c->outgoing->ev); if(c->status.connecting) close(c->socket); c->outgoing->timeout = 0; - do_outgoing_connection(c); + terminate_connection(c, c->status.active); } } } @@ -375,7 +368,7 @@ int main_loop(void) { #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; }