X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=src%2Fnet.c;h=87deb97b60d669bf19897a54b6dbd275de644f72;hb=8c0e37e33806cc44948e49d83ebce26dae3ba86d;hp=b333c5b7b05777595ede76205b18921953a7f70e;hpb=717ea66d7ba0c23f27d86b3d5c6992b751135455;p=meshlink diff --git a/src/net.c b/src/net.c index b333c5b7..87deb97b 100644 --- a/src/net.c +++ b/src/net.c @@ -1,9 +1,6 @@ /* net.c -- most of the network code - Copyright (C) 1998-2005 Ivo Timmermans, - 2000-2012 Guus Sliepen - 2006 Scott Lamb - 2011 Loïc Grenié + Copyright (C) 2014 Guus Sliepen 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 @@ -25,42 +22,38 @@ #include "utils.h" #include "conf.h" #include "connection.h" -#include "device.h" #include "graph.h" #include "logger.h" #include "meta.h" #include "net.h" #include "netutl.h" -#include "process.h" #include "protocol.h" -#include "subnet.h" #include "xalloc.h" int contradicting_add_edge = 0; int contradicting_del_edge = 0; static int sleeptime = 10; time_t last_config_check = 0; +static timeout_t pingtimer; +static timeout_t periodictimer; -/* Purge edges and subnets of unreachable nodes. Use carefully. */ +//TODO: move this to a better place +char *confbase; +/* Purge edges of unreachable nodes. Use carefully. */ + +// TODO: remove void purge(void) { logger(DEBUG_PROTOCOL, LOG_DEBUG, "Purging unreachable nodes"); - /* Remove all edges and subnets owned by unreachable nodes. */ + /* Remove all edges owned by unreachable nodes. */ for splay_each(node_t, n, node_tree) { if(!n->status.reachable) { logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Purging node %s (%s)", n->name, n->hostname); - for splay_each(subnet_t, s, n->subnet_tree) { - send_del_subnet(everyone, s); - if(!strictsubnets) - subnet_del(n, s); - } - for splay_each(edge_t, e, n->edge_tree) { - if(!tunnelserver) - send_del_edge(everyone, e); + send_del_edge(everyone, e); edge_del(e); } } @@ -73,10 +66,6 @@ void purge(void) { for splay_each(edge_t, e, edge_weight_tree) if(e->to == n) return; - - if(!autoconnect && (!strictsubnets || !n->subnet_tree->head)) - /* in strictsubnets mode do not delete nodes with subnets */ - node_del(n); } } } @@ -97,7 +86,7 @@ void terminate_connection(connection_t *c, bool report) { c->node->connection = NULL; if(c->edge) { - if(report && !tunnelserver) + if(report) send_del_edge(everyone, c->edge); edge_del(c->edge); @@ -113,8 +102,7 @@ void terminate_connection(connection_t *c, bool report) { edge_t *e; e = lookup_edge(c->node, myself); if(e) { - if(!tunnelserver) - send_del_edge(everyone, e); + send_del_edge(everyone, e); edge_del(e); } } @@ -127,6 +115,12 @@ void terminate_connection(connection_t *c, bool report) { if(outgoing) do_outgoing_connection(outgoing); + +#ifndef HAVE_MINGW + /* Clean up dead proxy processes */ + + while(waitpid(-1, NULL, WNOHANG) > 0); +#endif } /* @@ -137,18 +131,13 @@ void terminate_connection(connection_t *c, bool report) { end does not reply in time, we consider them dead and close the connection. */ -static void timeout_handler(int fd, short events, void *event) { - time_t now = time(NULL); - +static void timeout_handler(void *data) { for list_each(connection_t, c, connection_list) { - if(c->status.control) - continue; - - if(c->last_ping_time + pingtimeout <= now) { + if(c->last_ping_time + pingtimeout <= now.tv_sec) { if(c->status.active) { if(c->status.pinged) { - 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) { + logger(DEBUG_CONNECTIONS, LOG_INFO, "%s (%s) didn't respond to PING in %ld seconds", c->name, c->hostname, (long)now.tv_sec - c->last_ping_time); + } else if(c->last_ping_time + pinginterval <= now.tv_sec) { send_ping(c); continue; } else { @@ -164,10 +153,10 @@ static void timeout_handler(int fd, short events, void *event) { } } - event_add(event, &(struct timeval){pingtimeout, 0}); + timeout_set(data, &(struct timeval){pingtimeout, rand() % 100000}); } -static void periodic_handler(int fd, short events, void *event) { +static void periodic_handler(void *data) { /* Check if there are too many contradicting ADD_EDGE and DEL_EDGE messages. This usually only happens when another node has the same Name as this node. If so, sleep for a short while to prevent a storm of contradicting messages. @@ -194,7 +183,7 @@ static void periodic_handler(int fd, short events, void *event) { /* Count number of active connections */ int nc = 0; for list_each(connection_t, c, connection_list) { - if(c->status.active && !c->status.control) + if(c->status.active) nc++; } @@ -225,7 +214,7 @@ static void periodic_handler(int fd, short events, void *event) { if(!found) { logger(DEBUG_CONNECTIONS, LOG_INFO, "Autoconnecting to %s", n->name); - outgoing_t *outgoing = xmalloc_and_zero(sizeof *outgoing); + outgoing_t *outgoing = xzalloc(sizeof *outgoing); outgoing->name = xstrdup(n->name); list_insert_tail(outgoing_list, outgoing); setup_outgoing_connection(outgoing); @@ -241,7 +230,7 @@ static void periodic_handler(int fd, short events, void *event) { int i = 0; for list_each(connection_t, c, connection_list) { - if(!c->status.active || c->status.control) + if(!c->status.active) continue; if(i++ != r) @@ -278,52 +267,18 @@ static void periodic_handler(int fd, short events, void *event) { } } - event_add(event, &(struct timeval){5, 0}); + timeout_set(data, &(struct timeval){5, rand() % 100000}); } -void handle_meta_connection_data(int fd, short events, void *data) { - connection_t *c = data; - int 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 { - logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Error while connecting to %s (%s): %s", c->name, c->hostname, sockstrerror(result)); - terminate_connection(c, false); - return; - } - } - +void handle_meta_connection_data(connection_t *c) { if (!receive_meta(c)) { terminate_connection(c, c->status.active); return; } } -static void sigterm_handler(int signal, short events, void *data) { - logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(signal)); - event_loopexit(NULL); -} - -static void sighup_handler(int signal, short events, void *data) { - 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) { - char *fname; + char *fname = NULL; /* Reread our own configuration file */ @@ -331,13 +286,10 @@ int reload_configuration(void) { init_configuration(&config_tree); if(!read_server_config()) { - logger(DEBUG_ALWAYS, LOG_ERR, "Unable to reread configuration file, exitting."); - event_loopexit(NULL); + logger(DEBUG_ALWAYS, LOG_ERR, "Unable to reread configuration file."); return EINVAL; } - read_config_options(config_tree, NULL); - xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, myself->name); read_config_file(config_tree, fname); free(fname); @@ -346,64 +298,6 @@ int reload_configuration(void) { setup_myself_reloadable(); - /* If StrictSubnet is set, expire deleted Subnets and read new ones in */ - - if(strictsubnets) { - for splay_each(subnet_t, subnet, subnet_tree) - subnet->expires = 1; - - load_all_subnets(); - - for splay_each(subnet_t, subnet, subnet_tree) { - if(subnet->expires == 1) { - 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(everyone, subnet); - if(subnet->owner->status.reachable) - 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(); @@ -411,9 +305,6 @@ int reload_configuration(void) { /* 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) { @@ -423,66 +314,43 @@ int reload_configuration(void) { free(fname); } - last_config_check = time(NULL); + last_config_check = now.tv_sec; return 0; } void retry(void) { + /* Reset the reconnection timers for all outgoing connections */ + for list_each(outgoing_t, outgoing, outgoing_list) { + outgoing->timeout = 0; + if(outgoing->ev.cb) + timeout_set(&outgoing->ev, &(struct timeval){0, 0}); + } + + /* Check for outgoing connections that are in progress, and reset their ping timers */ 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; - terminate_connection(c, c->status.active); - } + if(c->outgoing && !c->node) + c->last_ping_time = 0; } + + /* Kick the ping timeout handler */ + timeout_set(&pingtimer, &(struct timeval){0, 0}); } /* this is where it all happens... */ int main_loop(void) { - struct event timeout_event; - struct event periodic_event; - - timeout_set(&timeout_event, timeout_handler, &timeout_event); - event_add(&timeout_event, &(struct timeval){pingtimeout, 0}); + timeout_add(&pingtimer, timeout_handler, &pingtimer, &(struct timeval){pingtimeout, rand() % 100000}); + timeout_add(&periodictimer, periodic_handler, &periodictimer, &(struct timeval){pingtimeout, rand() % 100000}); - timeout_set(&periodic_event, periodic_handler, &periodic_event); - event_add(&periodic_event, &(struct timeval){5, 0}); - -#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); - 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(&sigalrm_event, SIGALRM, sigalrm_handler, NULL); - signal_add(&sigalrm_event, NULL); -#endif - - if(event_loop(0) < 0) { + if(!event_loop()) { 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); + timeout_del(&periodictimer); + timeout_del(&pingtimer); return 0; }