1 |
/* |
2 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
3 |
* |
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* Copyright (c) 1997-2015 ircd-hybrid development team |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
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* USA |
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*/ |
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|
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/*! \file ircd.c |
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* \brief Starts up and runs the ircd. |
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* \version $Id$ |
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*/ |
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|
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#include "stdinc.h" |
28 |
#include "user.h" |
29 |
#include "list.h" |
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#include "ircd.h" |
31 |
#include "channel.h" |
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#include "client.h" |
33 |
#include "event.h" |
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#include "fdlist.h" |
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#include "hash.h" |
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#include "irc_string.h" |
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#include "ircd_signal.h" |
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#include "gline.h" |
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#include "motd.h" |
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#include "conf.h" |
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#include "hostmask.h" |
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#include "parse.h" |
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#include "res.h" |
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#include "restart.h" |
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#include "rng_mt.h" |
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#include "auth.h" |
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#include "s_bsd.h" |
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#include "log.h" |
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#include "server.h" /* try_connections */ |
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#include "send.h" |
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#include "whowas.h" |
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#include "modules.h" |
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#include "memory.h" |
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#include "mempool.h" |
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#include "ircd_getopt.h" |
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#include "watch.h" |
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#include "conf_db.h" |
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#include "conf_class.h" |
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#include "ipcache.h" |
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|
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|
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#ifdef HAVE_LIBGEOIP |
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GeoIP *geoip_ctx; |
64 |
#endif |
65 |
|
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struct timeval SystemTime; |
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struct Connection meConnection; /* That's also part of me */ |
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struct Client me = { .connection = &meConnection }; /* That's me */ |
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|
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char **myargv; |
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const char *logFileName = LPATH; |
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const char *pidFileName = PPATH; |
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|
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unsigned int dorehash; |
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unsigned int doremotd; |
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unsigned int default_server_capabs; |
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unsigned int splitmode; |
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unsigned int splitchecking; |
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unsigned int split_users; |
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unsigned int split_servers; |
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|
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static struct event event_cleanup_glines = |
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{ |
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.name = "cleanup_glines", |
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.handler = cleanup_glines, |
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.when = CLEANUP_GLINES_TIME |
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}; |
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|
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static struct event event_cleanup_tklines = |
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{ |
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.name = "cleanup_tklines", |
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.handler = cleanup_tklines, |
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.when = CLEANUP_TKLINES_TIME |
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}; |
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|
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static struct event event_try_connections = |
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{ |
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.name = "try_connections", |
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.handler = try_connections, |
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.when = STARTUP_CONNECTIONS_TIME |
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}; |
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|
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static struct event event_comm_checktimeouts = |
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{ |
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.name = "comm_checktimeouts", |
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.handler = comm_checktimeouts, |
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.when = 1 |
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}; |
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|
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static struct event event_save_all_databases = |
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{ |
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.name = "save_all_databases", |
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.handler = save_all_databases, |
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.when = DATABASE_UPDATE_TIMEOUT |
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}; |
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|
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struct event event_write_links_file = |
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{ |
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.name = "write_links_file", |
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.handler = write_links_file, |
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}; |
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|
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|
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/* |
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* print_startup - print startup information |
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*/ |
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static void |
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print_startup(int pid) |
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{ |
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printf("ircd: version %s(%s)\n", ircd_version, serno); |
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printf("ircd: pid %d\n", pid); |
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printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background" |
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: "foreground", ConfigGeneral.dpath); |
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} |
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|
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static void |
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make_daemon(void) |
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{ |
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int pid; |
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|
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if ((pid = fork()) < 0) |
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{ |
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perror("fork"); |
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exit(EXIT_FAILURE); |
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} |
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else if (pid > 0) |
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{ |
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print_startup(pid); |
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exit(EXIT_SUCCESS); |
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} |
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|
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setsid(); |
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} |
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|
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static int printVersion = 0; |
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|
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static struct lgetopt myopts[] = |
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{ |
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{"configfile", &ConfigGeneral.configfile, |
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STRING, "File to use for ircd.conf"}, |
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{"glinefile", &ConfigGeneral.glinefile, |
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STRING, "File to use for gline database"}, |
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{"klinefile", &ConfigGeneral.klinefile, |
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STRING, "File to use for kline database"}, |
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{"dlinefile", &ConfigGeneral.dlinefile, |
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STRING, "File to use for dline database"}, |
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{"xlinefile", &ConfigGeneral.xlinefile, |
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STRING, "File to use for xline database"}, |
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{"resvfile", &ConfigGeneral.resvfile, |
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STRING, "File to use for resv database"}, |
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{"logfile", &logFileName, |
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STRING, "File to use for ircd.log"}, |
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{"pidfile", &pidFileName, |
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STRING, "File to use for process ID"}, |
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{"foreground", &server_state.foreground, |
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YESNO, "Run in foreground (don't detach)"}, |
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{"version", &printVersion, |
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YESNO, "Print version and exit"}, |
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{"help", NULL, USAGE, "Print this text"}, |
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{NULL, NULL, STRING, NULL}, |
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}; |
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|
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void |
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set_time(void) |
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{ |
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struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 }; |
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|
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if (gettimeofday(&newtime, NULL) == -1) |
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{ |
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ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted", |
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strerror(errno)); |
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sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
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"Clock Failure (%s), TS can be corrupted", |
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strerror(errno)); |
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server_die("Clock Failure", 1); |
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} |
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|
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if (newtime.tv_sec < CurrentTime) |
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{ |
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ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)", |
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(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime); |
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sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
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"System clock is running backwards - (%lu < %lu)", |
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(unsigned long)newtime.tv_sec, |
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(unsigned long)CurrentTime); |
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set_back_events(CurrentTime - newtime.tv_sec); |
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} |
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|
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SystemTime.tv_sec = newtime.tv_sec; |
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SystemTime.tv_usec = newtime.tv_usec; |
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} |
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|
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static void |
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io_loop(void) |
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{ |
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while (1) |
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{ |
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if (listing_client_list.head) |
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{ |
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dlink_node *node = NULL, *node_next = NULL; |
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DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head) |
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safe_list_channels(node->data, 0); |
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} |
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|
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/* Run pending events */ |
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event_run(); |
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|
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comm_select(); |
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exit_aborted_clients(); |
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free_exited_clients(); |
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|
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/* Check to see whether we have to rehash the configuration .. */ |
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if (dorehash) |
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{ |
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conf_rehash(1); |
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dorehash = 0; |
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} |
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|
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if (doremotd) |
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{ |
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motd_recache(); |
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sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
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"Got signal SIGUSR1, reloading motd file(s)"); |
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doremotd = 0; |
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} |
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} |
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} |
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|
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/* initalialize_global_set_options() |
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* |
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* inputs - none |
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* output - none |
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* side effects - This sets all global set options needed |
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*/ |
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static void |
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initialize_global_set_options(void) |
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{ |
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GlobalSetOptions.autoconn = 1; |
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GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME; |
260 |
GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT; |
261 |
|
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if (ConfigGeneral.default_floodcount) |
263 |
GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount; |
264 |
else |
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GlobalSetOptions.floodcount = 10; |
266 |
|
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/* XXX I have no idea what to try here - Dianora */ |
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GlobalSetOptions.joinfloodcount = 16; |
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GlobalSetOptions.joinfloodtime = 8; |
270 |
|
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split_servers = ConfigChannel.default_split_server_count; |
272 |
split_users = ConfigChannel.default_split_user_count; |
273 |
|
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if (split_users && split_servers && (ConfigChannel.no_create_on_split || |
275 |
ConfigChannel.no_join_on_split)) |
276 |
{ |
277 |
splitmode = 1; |
278 |
splitchecking = 1; |
279 |
} |
280 |
|
281 |
GlobalSetOptions.ident_timeout = IDENT_TIMEOUT; |
282 |
} |
283 |
|
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/* initialize_server_capabs() |
285 |
* |
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* inputs - none |
287 |
* output - none |
288 |
*/ |
289 |
static void |
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initialize_server_capabs(void) |
291 |
{ |
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add_capability("QS", CAP_QS, 1); |
293 |
add_capability("EOB", CAP_EOB, 1); |
294 |
add_capability("TS6", CAP_TS6, 0); |
295 |
add_capability("CLUSTER", CAP_CLUSTER, 1); |
296 |
add_capability("SVS", CAP_SVS, 1); |
297 |
add_capability("CHW", CAP_CHW, 1); |
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add_capability("HOPS", CAP_HOPS, 1); |
299 |
} |
300 |
|
301 |
/* write_pidfile() |
302 |
* |
303 |
* inputs - filename+path of pid file |
304 |
* output - NONE |
305 |
* side effects - write the pid of the ircd to filename |
306 |
*/ |
307 |
static void |
308 |
write_pidfile(const char *filename) |
309 |
{ |
310 |
FILE *fb; |
311 |
|
312 |
if ((fb = fopen(filename, "w"))) |
313 |
{ |
314 |
char buff[IRCD_BUFSIZE]; |
315 |
unsigned int pid = (unsigned int)getpid(); |
316 |
|
317 |
snprintf(buff, sizeof(buff), "%u\n", pid); |
318 |
|
319 |
if (fputs(buff, fb) == -1) |
320 |
ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)", |
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pid, filename, strerror(errno)); |
322 |
|
323 |
fclose(fb); |
324 |
} |
325 |
else |
326 |
{ |
327 |
ilog(LOG_TYPE_IRCD, "Error opening pid file %s (%s)", |
328 |
filename, strerror(errno)); |
329 |
} |
330 |
} |
331 |
|
332 |
/* check_pidfile() |
333 |
* |
334 |
* inputs - filename+path of pid file |
335 |
* output - none |
336 |
* side effects - reads pid from pidfile and checks if ircd is in process |
337 |
* list. if it is, gracefully exits |
338 |
* -kre |
339 |
*/ |
340 |
static void |
341 |
check_pidfile(const char *filename) |
342 |
{ |
343 |
FILE *fb; |
344 |
char buff[IRCD_BUFSIZE]; |
345 |
pid_t pidfromfile; |
346 |
|
347 |
/* Don't do logging here, since we don't have log() initialised */ |
348 |
if ((fb = fopen(filename, "r"))) |
349 |
{ |
350 |
if (!fgets(buff, 20, fb)) |
351 |
{ |
352 |
/* log(L_ERROR, "Error reading from pid file %s (%s)", filename, |
353 |
* strerror(errno)); |
354 |
*/ |
355 |
} |
356 |
else |
357 |
{ |
358 |
pidfromfile = atoi(buff); |
359 |
|
360 |
if (!kill(pidfromfile, 0)) |
361 |
{ |
362 |
/* log(L_ERROR, "Server is already running"); */ |
363 |
printf("ircd: daemon is already running\n"); |
364 |
exit(-1); |
365 |
} |
366 |
} |
367 |
|
368 |
fclose(fb); |
369 |
} |
370 |
else if (errno != ENOENT) |
371 |
{ |
372 |
/* log(L_ERROR, "Error opening pid file %s", filename); */ |
373 |
} |
374 |
} |
375 |
|
376 |
/* setup_corefile() |
377 |
* |
378 |
* inputs - nothing |
379 |
* output - nothing |
380 |
* side effects - setups corefile to system limits. |
381 |
* -kre |
382 |
*/ |
383 |
static void |
384 |
setup_corefile(void) |
385 |
{ |
386 |
#ifdef HAVE_SYS_RESOURCE_H |
387 |
struct rlimit rlim; /* resource limits */ |
388 |
|
389 |
/* Set corefilesize to maximum */ |
390 |
if (!getrlimit(RLIMIT_CORE, &rlim)) |
391 |
{ |
392 |
rlim.rlim_cur = rlim.rlim_max; |
393 |
setrlimit(RLIMIT_CORE, &rlim); |
394 |
} |
395 |
#endif |
396 |
} |
397 |
|
398 |
#ifdef HAVE_LIBCRYPTO |
399 |
static int |
400 |
always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx) |
401 |
{ |
402 |
return 1; |
403 |
} |
404 |
#endif |
405 |
|
406 |
/* init_ssl() |
407 |
* |
408 |
* inputs - nothing |
409 |
* output - nothing |
410 |
* side effects - setups SSL context. |
411 |
*/ |
412 |
static void |
413 |
ssl_init(void) |
414 |
{ |
415 |
#ifdef HAVE_LIBCRYPTO |
416 |
SSL_load_error_strings(); |
417 |
SSLeay_add_ssl_algorithms(); |
418 |
|
419 |
if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method()))) |
420 |
{ |
421 |
const char *s = ERR_lib_error_string(ERR_get_error()); |
422 |
|
423 |
fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s); |
424 |
ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s); |
425 |
exit(EXIT_FAILURE); |
426 |
return; /* Not reached */ |
427 |
} |
428 |
|
429 |
SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET); |
430 |
SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE|SSL_OP_CIPHER_SERVER_PREFERENCE); |
431 |
SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE, |
432 |
always_accept_verify_cb); |
433 |
SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF); |
434 |
SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL"); |
435 |
|
436 |
#if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH) |
437 |
{ |
438 |
EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1); |
439 |
|
440 |
if (key) |
441 |
{ |
442 |
SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key); |
443 |
EC_KEY_free(key); |
444 |
} |
445 |
} |
446 |
|
447 |
SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE); |
448 |
#endif |
449 |
|
450 |
if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method()))) |
451 |
{ |
452 |
const char *s = ERR_lib_error_string(ERR_get_error()); |
453 |
|
454 |
fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s); |
455 |
ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s); |
456 |
exit(EXIT_FAILURE); |
457 |
return; /* Not reached */ |
458 |
} |
459 |
|
460 |
SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET); |
461 |
SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE); |
462 |
SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE, |
463 |
always_accept_verify_cb); |
464 |
SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF); |
465 |
#endif /* HAVE_LIBCRYPTO */ |
466 |
} |
467 |
|
468 |
int |
469 |
main(int argc, char *argv[]) |
470 |
{ |
471 |
/* Check to see if the user is running us as root, which is a nono */ |
472 |
if (!geteuid()) |
473 |
{ |
474 |
fprintf(stderr, "ERROR: This server won't run as root/superuser\n"); |
475 |
return -1; |
476 |
} |
477 |
|
478 |
/* Setup corefile size immediately after boot -kre */ |
479 |
setup_corefile(); |
480 |
|
481 |
/* save server boot time right away, so getrusage works correctly */ |
482 |
set_time(); |
483 |
|
484 |
/* It ain't random, but it ought to be a little harder to guess */ |
485 |
init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20))); |
486 |
|
487 |
dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning |
488 |
of Client list */ |
489 |
ConfigLog.use_logging = 1; |
490 |
ConfigGeneral.dpath = DPATH; |
491 |
ConfigGeneral.spath = SPATH; |
492 |
ConfigGeneral.mpath = MPATH; |
493 |
ConfigGeneral.configfile = CPATH; /* Server configuration file */ |
494 |
ConfigGeneral.klinefile = KPATH; /* Server kline file */ |
495 |
ConfigGeneral.glinefile = GPATH; /* Server gline file */ |
496 |
ConfigGeneral.xlinefile = XPATH; /* Server xline file */ |
497 |
ConfigGeneral.dlinefile = DLPATH; /* dline file */ |
498 |
ConfigGeneral.resvfile = RESVPATH; /* resv file */ |
499 |
|
500 |
myargv = argv; |
501 |
umask(077); /* better safe than sorry --SRB */ |
502 |
|
503 |
parseargs(&argc, &argv, myopts); |
504 |
|
505 |
if (printVersion) |
506 |
{ |
507 |
printf("ircd: version %s(%s)\n", ircd_version, serno); |
508 |
exit(EXIT_SUCCESS); |
509 |
} |
510 |
|
511 |
if (chdir(ConfigGeneral.dpath)) |
512 |
{ |
513 |
perror("chdir"); |
514 |
exit(EXIT_FAILURE); |
515 |
} |
516 |
|
517 |
ssl_init(); |
518 |
|
519 |
if (!server_state.foreground) |
520 |
{ |
521 |
make_daemon(); |
522 |
close_standard_fds(); /* this needs to be before init_netio()! */ |
523 |
} |
524 |
else |
525 |
print_startup(getpid()); |
526 |
|
527 |
setup_signals(); |
528 |
|
529 |
/* We need this to initialise the fd array before anything else */ |
530 |
fdlist_init(); |
531 |
log_set_file(LOG_TYPE_IRCD, 0, logFileName); |
532 |
|
533 |
init_netio(); /* This needs to be setup early ! -- adrian */ |
534 |
|
535 |
/* Check if there is pidfile and daemon already running */ |
536 |
check_pidfile(pidFileName); |
537 |
|
538 |
mp_pool_init(); |
539 |
init_dlink_nodes(); |
540 |
init_isupport(); |
541 |
dbuf_init(); |
542 |
hash_init(); |
543 |
ipcache_init(); |
544 |
client_init(); |
545 |
class_init(); |
546 |
whowas_init(); |
547 |
watch_init(); |
548 |
auth_init(); /* Initialise the auth code */ |
549 |
init_resolver(); /* Needs to be setup before the io loop */ |
550 |
modules_init(); |
551 |
read_conf_files(1); /* cold start init conf files */ |
552 |
init_uid(); |
553 |
initialize_server_capabs(); /* Set up default_server_capabs */ |
554 |
initialize_global_set_options(); |
555 |
channel_init(); |
556 |
read_links_file(); |
557 |
motd_init(); |
558 |
user_usermodes_init(); |
559 |
#ifdef HAVE_LIBGEOIP |
560 |
geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE); |
561 |
#endif |
562 |
|
563 |
if (EmptyString(ConfigServerInfo.sid)) |
564 |
{ |
565 |
ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block."); |
566 |
exit(EXIT_FAILURE); |
567 |
} |
568 |
|
569 |
strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id)); |
570 |
|
571 |
if (EmptyString(ConfigServerInfo.name)) |
572 |
{ |
573 |
ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block."); |
574 |
exit(EXIT_FAILURE); |
575 |
} |
576 |
|
577 |
strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name)); |
578 |
|
579 |
/* serverinfo{} description must exist. If not, error out.*/ |
580 |
if (EmptyString(ConfigServerInfo.description)) |
581 |
{ |
582 |
ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block."); |
583 |
exit(EXIT_FAILURE); |
584 |
} |
585 |
|
586 |
strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info)); |
587 |
|
588 |
me.from = &me; |
589 |
me.servptr = &me; |
590 |
me.connection->lasttime = CurrentTime; |
591 |
me.connection->since = CurrentTime; |
592 |
me.connection->firsttime = CurrentTime; |
593 |
|
594 |
SetMe(&me); |
595 |
make_server(&me); |
596 |
|
597 |
hash_add_id(&me); |
598 |
hash_add_client(&me); |
599 |
|
600 |
dlinkAdd(&me, make_dlink_node(), &global_server_list); |
601 |
|
602 |
load_kline_database(); |
603 |
load_dline_database(); |
604 |
load_gline_database(); |
605 |
load_xline_database(); |
606 |
load_resv_database(); |
607 |
|
608 |
load_all_modules(1); |
609 |
load_conf_modules(); |
610 |
load_core_modules(1); |
611 |
|
612 |
write_pidfile(pidFileName); |
613 |
|
614 |
ilog(LOG_TYPE_IRCD, "Server Ready"); |
615 |
|
616 |
event_addish(&event_cleanup_glines, NULL); |
617 |
event_addish(&event_cleanup_tklines, NULL); |
618 |
|
619 |
/* We want try_connections to be called as soon as possible now! -- adrian */ |
620 |
/* No, 'cause after a restart it would cause all sorts of nick collides */ |
621 |
event_addish(&event_try_connections, NULL); |
622 |
|
623 |
/* Setup the timeout check. I'll shift it later :) -- adrian */ |
624 |
event_add(&event_comm_checktimeouts, NULL); |
625 |
|
626 |
event_addish(&event_save_all_databases, NULL); |
627 |
|
628 |
if (ConfigServerHide.links_delay > 0) |
629 |
{ |
630 |
event_write_links_file.when = ConfigServerHide.links_delay; |
631 |
event_addish(&event_write_links_file, NULL); |
632 |
} |
633 |
else |
634 |
ConfigServerHide.links_disabled = 1; |
635 |
|
636 |
if (splitmode) |
637 |
event_addish(&splitmode_event, NULL); |
638 |
|
639 |
io_loop(); |
640 |
return 0; |
641 |
} |