trunk/src/ircd.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2015 ircd-hybrid development team
 *
 *  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
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 *  USA
 */

/*! \file ircd.c
 * \brief Starts up and runs the ircd.
 * \version $Id$
 */

#include "stdinc.h"
#include "user.h"
#include "list.h"
#include "ircd.h"
#include "channel.h"
#include "client.h"
#include "event.h"
#include "fdlist.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd_signal.h"
#include "gline.h"
#include "motd.h"
#include "conf.h"
#include "hostmask.h"
#include "parse.h"
#include "res.h"
#include "restart.h"
#include "rng_mt.h"
#include "auth.h"
#include "s_bsd.h"
#include "log.h"
#include "server.h"      /* try_connections */
#include "send.h"
#include "whowas.h"
#include "modules.h"
#include "memory.h"
#include "mempool.h"
#include "ircd_getopt.h"
#include "watch.h"
#include "conf_db.h"
#include "conf_class.h"
#include "ipcache.h"


#ifdef HAVE_LIBGEOIP
GeoIP *geoip_ctx;
#endif

struct SetOptions GlobalSetOptions;  /* /quote set variables */
struct Counter Count;
struct ServerState_t server_state;
struct ServerStatistics ServerStats;
struct timeval SystemTime;
struct Connection meConnection;  /* That's also part of me */
struct Client me = { .connection = &meConnection };  /* That's me */

char **myargv;
const char *logFileName = LPATH;
const char *pidFileName = PPATH;

unsigned int dorehash;
unsigned int doremotd;
unsigned int default_server_capabs;
unsigned int splitmode;
unsigned int splitchecking;
unsigned int split_users;
unsigned int split_servers;

static struct event event_cleanup_glines =
{
  .name = "cleanup_glines",
  .handler = cleanup_glines,
  .when = CLEANUP_GLINES_TIME
};

static struct event event_cleanup_tklines =
{
  .name = "cleanup_tklines",
  .handler = cleanup_tklines,
  .when = CLEANUP_TKLINES_TIME
};

static struct event event_try_connections =
{
  .name = "try_connections",
  .handler = try_connections,
  .when = STARTUP_CONNECTIONS_TIME
};

static struct event event_comm_checktimeouts =
{
  .name = "comm_checktimeouts",
  .handler = comm_checktimeouts,
  .when = 1
};

static struct event event_save_all_databases =
{
  .name = "save_all_databases",
  .handler = save_all_databases,
  .when = DATABASE_UPDATE_TIMEOUT
};

struct event event_write_links_file =
{
  .name = "write_links_file",
  .handler = write_links_file,
};


/*
 * print_startup - print startup information
 */
static void
print_startup(int pid)
{
  printf("ircd: version %s(%s)\n", ircd_version, serno);
  printf("ircd: pid %d\n", pid);
  printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
         : "foreground", ConfigGeneral.dpath);
}

static void
make_daemon(void)
{
  int pid;

  if ((pid = fork()) < 0)
  {
    perror("fork");
    exit(EXIT_FAILURE);
  }
  else if (pid > 0)
  {
    print_startup(pid);
    exit(EXIT_SUCCESS);
  }

  setsid();
}

static int printVersion = 0;

static struct lgetopt myopts[] =
{
  {"configfile", &ConfigGeneral.configfile,
   STRING, "File to use for ircd.conf"},
  {"glinefile",  &ConfigGeneral.glinefile,
   STRING, "File to use for gline database"},
  {"klinefile",  &ConfigGeneral.klinefile,
   STRING, "File to use for kline database"},
  {"dlinefile",  &ConfigGeneral.dlinefile,
   STRING, "File to use for dline database"},
  {"xlinefile",  &ConfigGeneral.xlinefile,
   STRING, "File to use for xline database"},
  {"resvfile",  &ConfigGeneral.resvfile,
   STRING, "File to use for resv database"},
  {"logfile",    &logFileName,
   STRING, "File to use for ircd.log"},
  {"pidfile",    &pidFileName,
   STRING, "File to use for process ID"},
  {"foreground", &server_state.foreground,
   YESNO, "Run in foreground (don't detach)"},
  {"version",    &printVersion,
   YESNO, "Print version and exit"},
  {"help", NULL, USAGE, "Print this text"},
  {NULL, NULL, STRING, NULL},
};

void
set_time(void)
{
  struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };

  if (gettimeofday(&newtime, NULL) == -1)
  {
    ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
         strerror(errno));
    sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                         "Clock Failure (%s), TS can be corrupted",
                         strerror(errno));
    server_die("Clock Failure", 1);
  }

  if (newtime.tv_sec < CurrentTime)
  {
    ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
         (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
    sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
                         "System clock is running backwards - (%lu < %lu)",
                         (unsigned long)newtime.tv_sec,
                         (unsigned long)CurrentTime);
    set_back_events(CurrentTime - newtime.tv_sec);
  }

  SystemTime.tv_sec  = newtime.tv_sec;
  SystemTime.tv_usec = newtime.tv_usec;
}

static void
io_loop(void)
{
  while (1)
  {
    if (listing_client_list.head)
    {
      dlink_node *node = NULL, *node_next = NULL;
      DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
        safe_list_channels(node->data, 0);
    }

    /* Run pending events */
    event_run();

    comm_select();
    exit_aborted_clients();
    free_exited_clients();

    /* Check to see whether we have to rehash the configuration .. */
    if (dorehash)
    {
      conf_rehash(1);
      dorehash = 0;
    }

    if (doremotd)
    {
      motd_recache();
      sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                           "Got signal SIGUSR1, reloading motd file(s)");
      doremotd = 0;
    }
  }
}

/* initalialize_global_set_options()
 *
 * inputs       - none
 * output       - none
 * side effects - This sets all global set options needed
 */
static void
initialize_global_set_options(void)
{
  GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
  GlobalSetOptions.autoconn = 1;
  GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
  GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
  GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
  GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
  GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;

  split_servers = ConfigChannel.default_split_server_count;
  split_users   = ConfigChannel.default_split_user_count;

  if (split_users && split_servers && (ConfigChannel.no_create_on_split ||
                                       ConfigChannel.no_join_on_split))
  {
    splitmode     = 1;
    splitchecking = 1;
  }

  GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
}

/* initialize_server_capabs()
 *
 * inputs       - none
 * output       - none
 */
static void
initialize_server_capabs(void)
{
  add_capability("QS", CAP_QS, 1);
  add_capability("EOB", CAP_EOB, 1);
  add_capability("TS6", CAP_TS6, 0);
  add_capability("CLUSTER", CAP_CLUSTER, 1);
  add_capability("SVS", CAP_SVS, 1);
  add_capability("CHW", CAP_CHW, 1);
  add_capability("HOPS", CAP_HOPS, 1);
}

/* write_pidfile()
 *
 * inputs       - filename+path of pid file
 * output       - NONE
 * side effects - write the pid of the ircd to filename
 */
static void
write_pidfile(const char *filename)
{
  FILE *fb;

  if ((fb = fopen(filename, "w")))
  {
    char buff[IRCD_BUFSIZE];
    unsigned int pid = (unsigned int)getpid();

    snprintf(buff, sizeof(buff), "%u\n", pid);

    if (fputs(buff, fb) == -1)
      ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
           filename, strerror(errno));

    fclose(fb);
  }
  else
    ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
         filename, strerror(errno));
}

/* check_pidfile()
 *
 * inputs       - filename+path of pid file
 * output       - none
 * side effects - reads pid from pidfile and checks if ircd is in process
 *                list. if it is, gracefully exits
 * -kre
 */
static void
check_pidfile(const char *filename)
{
  FILE *fb;
  char buff[IRCD_BUFSIZE];
  pid_t pidfromfile;

  /* Don't do logging here, since we don't have log() initialised */
  if ((fb = fopen(filename, "r")))
  {
    if (!fgets(buff, 20, fb))
    {
      /* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
       * strerror(errno));
       */
    }
    else
    {
      pidfromfile = atoi(buff);

      if (!kill(pidfromfile, 0))
      {
        /* log(L_ERROR, "Server is already running"); */
        printf("ircd: daemon is already running\n");
        exit(-1);
      }
    }

    fclose(fb);
  }
  else if (errno != ENOENT)
  {
    /* log(L_ERROR, "Error opening pid file %s", filename); */
  }
}

/* setup_corefile()
 *
 * inputs       - nothing
 * output       - nothing
 * side effects - setups corefile to system limits.
 * -kre
 */
static void
setup_corefile(void)
{
#ifdef HAVE_SYS_RESOURCE_H
  struct rlimit rlim; /* resource limits */

  /* Set corefilesize to maximum */
  if (!getrlimit(RLIMIT_CORE, &rlim))
  {
    rlim.rlim_cur = rlim.rlim_max;
    setrlimit(RLIMIT_CORE, &rlim);
  }
#endif
}

#ifdef HAVE_LIBCRYPTO
static int
always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
{
  return 1;
}
#endif

/* init_ssl()
 *
 * inputs       - nothing
 * output       - nothing
 * side effects - setups SSL context.
 */
static void
ssl_init(void)
{
#ifdef HAVE_LIBCRYPTO
  SSL_load_error_strings();
  SSLeay_add_ssl_algorithms();

  if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
  {
    const char *s = ERR_lib_error_string(ERR_get_error());

    fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
    ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s);
    exit(EXIT_FAILURE);
    return;  /* Not reached */
  }

  SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
  SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE|SSL_OP_CIPHER_SERVER_PREFERENCE);
  SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
                     always_accept_verify_cb);
  SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
  SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");

#if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH)
  {
    EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);

    if (key)
    {
      SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
      EC_KEY_free(key);
    }
  }

  SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
#endif

  if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
  {
    const char *s = ERR_lib_error_string(ERR_get_error());

    fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
    ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s);
    exit(EXIT_FAILURE);
    return;  /* Not reached */
  }

  SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
  SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
  SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
                     always_accept_verify_cb);
  SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
#endif /* HAVE_LIBCRYPTO */
}

int
main(int argc, char *argv[])
{
  /* Check to see if the user is running us as root, which is a nono */
  if (!geteuid())
  {
    fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
    return -1;
  }

  /* Setup corefile size immediately after boot -kre */
  setup_corefile();

  /* Save server boot time right away, so getrusage works correctly */
  set_time();

  /* It's not random, but it ought to be a little harder to guess */
  init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));

  dlinkAdd(&me, &me.node, &global_client_list);

  ConfigGeneral.dpath      = DPATH;
  ConfigGeneral.spath      = SPATH;
  ConfigGeneral.mpath      = MPATH;
  ConfigGeneral.configfile = CPATH;    /* Server configuration file */
  ConfigGeneral.klinefile  = KPATH;    /* Server kline file         */
  ConfigGeneral.glinefile  = GPATH;    /* Server gline file         */
  ConfigGeneral.xlinefile  = XPATH;    /* Server xline file         */
  ConfigGeneral.dlinefile  = DLPATH;   /* dline file                */
  ConfigGeneral.resvfile   = RESVPATH; /* resv file                 */

  myargv = argv;
  umask(077);  /* umask 077: u=rwx,g=,o= */

  parseargs(&argc, &argv, myopts);

  if (printVersion)
  {
    printf("ircd: version %s(%s)\n", ircd_version, serno);
    exit(EXIT_SUCCESS);
  }

  if (chdir(ConfigGeneral.dpath))
  {
    perror("chdir");
    exit(EXIT_FAILURE);
  }

  ssl_init();

  if (!server_state.foreground)
  {
    make_daemon();
    close_standard_fds(); /* this needs to be before init_netio()! */
  }
  else
    print_startup(getpid());

  setup_signals();

  /* We need this to initialise the fd array before anything else */
  fdlist_init();
  log_set_file(LOG_TYPE_IRCD, 0, logFileName);

  init_netio();         /* This needs to be setup early ! -- adrian */

  /* Check if there is pidfile and daemon already running */
  check_pidfile(pidFileName);

  mp_pool_init();
  init_dlink_nodes();
  init_isupport();
  dbuf_init();
  hash_init();
  ipcache_init();
  client_init();
  class_init();
  whowas_init();
  watch_init();
  auth_init();          /* Initialise the auth code */
  init_resolver();      /* Needs to be setup before the io loop */
  modules_init();
  read_conf_files(1);   /* cold start init conf files */
  init_uid();
  initialize_server_capabs();   /* Set up default_server_capabs */
  initialize_global_set_options();  /* Has to be called after read_conf_files() */
  channel_init();
  read_links_file();
  motd_init();
  user_usermodes_init();
#ifdef HAVE_LIBGEOIP
  geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
#endif

  if (EmptyString(ConfigServerInfo.sid))
  {
    ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
    exit(EXIT_FAILURE);
  }

  strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));

  if (EmptyString(ConfigServerInfo.name))
  {
    ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
    exit(EXIT_FAILURE);
  }

  strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));

  /* serverinfo{} description must exist.  If not, error out.*/
  if (EmptyString(ConfigServerInfo.description))
  {
    ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
    exit(EXIT_FAILURE);
  }

  strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));

  me.from = &me;
  me.servptr = &me;
  me.connection->lasttime = CurrentTime;
  me.connection->since = CurrentTime;
  me.connection->firsttime = CurrentTime;

  SetMe(&me);
  make_server(&me);

  hash_add_id(&me);
  hash_add_client(&me);

  dlinkAdd(&me, make_dlink_node(), &global_server_list);

  load_kline_database();
  load_dline_database();
  load_gline_database();
  load_xline_database();
  load_resv_database();

  load_all_modules(1);
  load_conf_modules();
  load_core_modules(1);

  write_pidfile(pidFileName);

  ilog(LOG_TYPE_IRCD, "Server Ready");

  event_addish(&event_cleanup_glines, NULL);
  event_addish(&event_cleanup_tklines, NULL);

  /* We want try_connections to be called as soon as possible now! -- adrian */
  /* No, 'cause after a restart it would cause all sorts of nick collides */
  event_addish(&event_try_connections, NULL);

  /* Setup the timeout check. I'll shift it later :)  -- adrian */
  event_add(&event_comm_checktimeouts, NULL);

  event_addish(&event_save_all_databases, NULL);

  if (ConfigServerHide.links_delay > 0)
  {
    event_write_links_file.when = ConfigServerHide.links_delay;
    event_addish(&event_write_links_file, NULL);
  }
  else
    ConfigServerHide.links_disabled = 1;

  if (splitmode)
    event_addish(&splitmode_event, NULL);

  io_loop();
  return 0;
}
Revision:	5737
Committed:	Sun Mar 29 11:11:20 2015 UTC (11 years, 6 months ago) by michael
Content type:	text/x-csrc
File size:	16730 byte(s)
Log Message:	- ircd.c:write_pidfile(): removed the PID from the error message
#	User	Rev	Content
1	adx	30	/*
2	michael	2916	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	5347	* Copyright (c) 1997-2015 ircd-hybrid development team
5	adx	30	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18	michael	4565	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	adx	30	* USA
20			*/
21
22	michael	2916	/*! \file ircd.c
23			* \brief Starts up and runs the ircd.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	michael	3347	#include "user.h"
29	michael	1011	#include "list.h"
30	adx	30	#include "ircd.h"
31			#include "channel.h"
32			#include "client.h"
33			#include "event.h"
34			#include "fdlist.h"
35			#include "hash.h"
36			#include "irc_string.h"
37			#include "ircd_signal.h"
38	michael	3321	#include "gline.h"
39	adx	30	#include "motd.h"
40	michael	1632	#include "conf.h"
41	adx	30	#include "hostmask.h"
42			#include "parse.h"
43	michael	3322	#include "res.h"
44	adx	30	#include "restart.h"
45	michael	982	#include "rng_mt.h"
46	michael	3324	#include "auth.h"
47	adx	30	#include "s_bsd.h"
48	michael	1309	#include "log.h"
49	michael	3347	#include "server.h" /* try_connections */
50	adx	30	#include "send.h"
51			#include "whowas.h"
52			#include "modules.h"
53			#include "memory.h"
54	michael	1654	#include "mempool.h"
55	adx	30	#include "ircd_getopt.h"
56	michael	876	#include "watch.h"
57	michael	1622	#include "conf_db.h"
58	michael	1632	#include "conf_class.h"
59	michael	4325	#include "ipcache.h"
60	adx	30
61	michael	1858
62			#ifdef HAVE_LIBGEOIP
63			GeoIP *geoip_ctx;
64			#endif
65	michael	2872
66	michael	5737	struct SetOptions GlobalSetOptions; /* /quote set variables */
67	michael	5602	struct Counter Count;
68			struct ServerState_t server_state;
69			struct ServerStatistics ServerStats;
70	adx	30	struct timeval SystemTime;
71	michael	5737	struct Connection meConnection; /* That's also part of me */
72	michael	5470	struct Client me = { .connection = &meConnection }; /* That's me */
73	adx	30
74	michael	5460	char **myargv;
75	adx	30	const char *logFileName = LPATH;
76			const char *pidFileName = PPATH;
77
78	michael	5460	unsigned int dorehash;
79			unsigned int doremotd;
80	michael	3907	unsigned int default_server_capabs;
81	michael	1013	unsigned int splitmode;
82			unsigned int splitchecking;
83			unsigned int split_users;
84	adx	30	unsigned int split_servers;
85
86	michael	4094	static struct event event_cleanup_glines =
87			{
88			.name = "cleanup_glines",
89			.handler = cleanup_glines,
90			.when = CLEANUP_GLINES_TIME
91			};
92
93			static struct event event_cleanup_tklines =
94			{
95			.name = "cleanup_tklines",
96			.handler = cleanup_tklines,
97			.when = CLEANUP_TKLINES_TIME
98			};
99
100			static struct event event_try_connections =
101			{
102			.name = "try_connections",
103			.handler = try_connections,
104			.when = STARTUP_CONNECTIONS_TIME
105			};
106
107			static struct event event_comm_checktimeouts =
108			{
109			.name = "comm_checktimeouts",
110			.handler = comm_checktimeouts,
111			.when = 1
112			};
113
114			static struct event event_save_all_databases =
115			{
116			.name = "save_all_databases",
117			.handler = save_all_databases,
118			.when = DATABASE_UPDATE_TIMEOUT
119			};
120
121			struct event event_write_links_file =
122			{
123			.name = "write_links_file",
124			.handler = write_links_file,
125			};
126
127
128	adx	30	/*
129			* print_startup - print startup information
130			*/
131			static void
132			print_startup(int pid)
133			{
134	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
135	adx	30	printf("ircd: pid %d\n", pid);
136			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
137	michael	4340	: "foreground", ConfigGeneral.dpath);
138	adx	30	}
139
140			static void
141			make_daemon(void)
142			{
143			int pid;
144
145			if ((pid = fork()) < 0)
146			{
147			perror("fork");
148			exit(EXIT_FAILURE);
149			}
150			else if (pid > 0)
151			{
152			print_startup(pid);
153			exit(EXIT_SUCCESS);
154			}
155
156			setsid();
157			}
158
159			static int printVersion = 0;
160
161	michael	3215	static struct lgetopt myopts[] =
162			{
163	michael	4340	{"configfile", &ConfigGeneral.configfile,
164	adx	30	STRING, "File to use for ircd.conf"},
165	michael	4340	{"glinefile", &ConfigGeneral.glinefile,
166	michael	1718	STRING, "File to use for gline database"},
167	michael	4340	{"klinefile", &ConfigGeneral.klinefile,
168	michael	1718	STRING, "File to use for kline database"},
169	michael	4340	{"dlinefile", &ConfigGeneral.dlinefile,
170	michael	1718	STRING, "File to use for dline database"},
171	michael	4340	{"xlinefile", &ConfigGeneral.xlinefile,
172	michael	1718	STRING, "File to use for xline database"},
173	michael	4340	{"resvfile", &ConfigGeneral.resvfile,
174	michael	1718	STRING, "File to use for resv database"},
175	michael	2916	{"logfile", &logFileName,
176	adx	30	STRING, "File to use for ircd.log"},
177			{"pidfile", &pidFileName,
178			STRING, "File to use for process ID"},
179	michael	2916	{"foreground", &server_state.foreground,
180	adx	30	YESNO, "Run in foreground (don't detach)"},
181	michael	2916	{"version", &printVersion,
182	adx	30	YESNO, "Print version and exit"},
183			{"help", NULL, USAGE, "Print this text"},
184			{NULL, NULL, STRING, NULL},
185			};
186
187			void
188			set_time(void)
189			{
190	michael	2978	struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
191	adx	30
192			if (gettimeofday(&newtime, NULL) == -1)
193			{
194	michael	1247	ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
195	adx	30	strerror(errno));
196	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
197	adx	30	"Clock Failure (%s), TS can be corrupted",
198			strerror(errno));
199	michael	3167	server_die("Clock Failure", 1);
200	adx	30	}
201
202			if (newtime.tv_sec < CurrentTime)
203			{
204	michael	2980	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
205			(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
206			sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
207			"System clock is running backwards - (%lu < %lu)",
208			(unsigned long)newtime.tv_sec,
209			(unsigned long)CurrentTime);
210	adx	30	set_back_events(CurrentTime - newtime.tv_sec);
211			}
212
213			SystemTime.tv_sec = newtime.tv_sec;
214			SystemTime.tv_usec = newtime.tv_usec;
215			}
216
217			static void
218			io_loop(void)
219			{
220	michael	3215	while (1)
221	adx	30	{
222			if (listing_client_list.head)
223			{
224	michael	4815	dlink_node node = NULL, node_next = NULL;
225			DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
226			safe_list_channels(node->data, 0);
227	adx	30	}
228
229	michael	4094	/* Run pending events */
230			event_run();
231	adx	30
232			comm_select();
233			exit_aborted_clients();
234			free_exited_clients();
235
236			/* Check to see whether we have to rehash the configuration .. */
237			if (dorehash)
238			{
239	michael	4982	conf_rehash(1);
240	adx	30	dorehash = 0;
241			}
242	michael	3215
243	adx	30	if (doremotd)
244			{
245	michael	2150	motd_recache();
246	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
247	michael	3065	"Got signal SIGUSR1, reloading motd file(s)");
248	adx	30	doremotd = 0;
249			}
250			}
251			}
252
253			/* initalialize_global_set_options()
254			*
255			* inputs - none
256			* output - none
257	michael	2916	* side effects - This sets all global set options needed
258	adx	30	*/
259			static void
260			initialize_global_set_options(void)
261			{
262	michael	5489	GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
263	michael	5499	GlobalSetOptions.autoconn = 1;
264	adx	30	GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
265	michael	5499	GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
266			GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
267	michael	5489	GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
268			GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
269	adx	30
270			split_servers = ConfigChannel.default_split_server_count;
271			split_users = ConfigChannel.default_split_user_count;
272
273			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
274			ConfigChannel.no_join_on_split))
275			{
276			splitmode = 1;
277			splitchecking = 1;
278			}
279
280			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
281			}
282
283			/* initialize_server_capabs()
284			*
285			* inputs - none
286			* output - none
287			*/
288			static void
289			initialize_server_capabs(void)
290			{
291			add_capability("QS", CAP_QS, 1);
292			add_capability("EOB", CAP_EOB, 1);
293	michael	1117	add_capability("TS6", CAP_TS6, 0);
294	adx	30	add_capability("CLUSTER", CAP_CLUSTER, 1);
295	michael	1196	add_capability("SVS", CAP_SVS, 1);
296	michael	3267	add_capability("CHW", CAP_CHW, 1);
297	adx	30	add_capability("HOPS", CAP_HOPS, 1);
298			}
299
300			/* write_pidfile()
301			*
302			* inputs - filename+path of pid file
303			* output - NONE
304			* side effects - write the pid of the ircd to filename
305			*/
306			static void
307			write_pidfile(const char *filename)
308			{
309	michael	1325	FILE *fb;
310	adx	30
311	michael	1325	if ((fb = fopen(filename, "w")))
312	adx	30	{
313	michael	2691	char buff[IRCD_BUFSIZE];
314	adx	30	unsigned int pid = (unsigned int)getpid();
315
316	michael	1325	snprintf(buff, sizeof(buff), "%u\n", pid);
317
318	michael	4736	if (fputs(buff, fb) == -1)
319	michael	5737	ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
320			filename, strerror(errno));
321	adx	30
322	michael	1325	fclose(fb);
323	adx	30	}
324			else
325	michael	5566	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
326	michael	4748	filename, strerror(errno));
327	adx	30	}
328
329			/* check_pidfile()
330			*
331			* inputs - filename+path of pid file
332			* output - none
333			* side effects - reads pid from pidfile and checks if ircd is in process
334			* list. if it is, gracefully exits
335			* -kre
336			*/
337			static void
338			check_pidfile(const char *filename)
339			{
340	michael	1325	FILE *fb;
341	michael	2691	char buff[IRCD_BUFSIZE];
342	adx	30	pid_t pidfromfile;
343
344			/* Don't do logging here, since we don't have log() initialised */
345	michael	1325	if ((fb = fopen(filename, "r")))
346	adx	30	{
347	michael	4733	if (!fgets(buff, 20, fb))
348	adx	30	{
349			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
350			* strerror(errno));
351			*/
352			}
353			else
354			{
355			pidfromfile = atoi(buff);
356
357			if (!kill(pidfromfile, 0))
358			{
359			/* log(L_ERROR, "Server is already running"); */
360			printf("ircd: daemon is already running\n");
361			exit(-1);
362			}
363			}
364
365	michael	1325	fclose(fb);
366	adx	30	}
367			else if (errno != ENOENT)
368			{
369			/* log(L_ERROR, "Error opening pid file %s", filename); */
370			}
371			}
372
373			/* setup_corefile()
374			*
375			* inputs - nothing
376			* output - nothing
377			* side effects - setups corefile to system limits.
378			* -kre
379			*/
380			static void
381			setup_corefile(void)
382			{
383			#ifdef HAVE_SYS_RESOURCE_H
384			struct rlimit rlim; /* resource limits */
385
386			/* Set corefilesize to maximum */
387			if (!getrlimit(RLIMIT_CORE, &rlim))
388			{
389			rlim.rlim_cur = rlim.rlim_max;
390			setrlimit(RLIMIT_CORE, &rlim);
391			}
392			#endif
393			}
394
395	michael	2228	#ifdef HAVE_LIBCRYPTO
396			static int
397			always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
398			{
399			return 1;
400			}
401			#endif
402
403	adx	30	/* init_ssl()
404			*
405			* inputs - nothing
406			* output - nothing
407			* side effects - setups SSL context.
408			*/
409			static void
410	michael	1798	ssl_init(void)
411	adx	30	{
412			#ifdef HAVE_LIBCRYPTO
413			SSL_load_error_strings();
414			SSLeay_add_ssl_algorithms();
415
416	michael	4733	if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
417	adx	30	{
418	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
419	adx	30
420	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
421	michael	4763	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s);
422	michael	4497	exit(EXIT_FAILURE);
423	michael	4751	return; /* Not reached */
424	adx	30	}
425
426	michael	4730	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
427	michael	4593	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE\|SSL_OP_CIPHER_SERVER_PREFERENCE);
428	michael	4340	SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
429	michael	2228	always_accept_verify_cb);
430	michael	4730	SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
431	michael	4892	SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");
432	adx	30
433	michael	4744	#if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH)
434	michael	4070	{
435			EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
436
437			if (key)
438			{
439	michael	4340	SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
440	michael	4070	EC_KEY_free(key);
441			}
442			}
443
444	michael	4340	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
445	michael	4070	#endif
446
447	michael	4733	if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
448	michael	1303	{
449	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
450	michael	1303
451	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
452	michael	4763	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s);
453	michael	4497	exit(EXIT_FAILURE);
454	michael	4751	return; /* Not reached */
455	michael	1303	}
456
457	michael	4730	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
458	michael	4340	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
459			SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
460	michael	2228	always_accept_verify_cb);
461	michael	4730	SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
462	adx	30	#endif /* HAVE_LIBCRYPTO */
463			}
464
465			int
466			main(int argc, char *argv[])
467			{
468	michael	2253	/* Check to see if the user is running us as root, which is a nono */
469	michael	4733	if (!geteuid())
470	adx	30	{
471	michael	3525	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
472	michael	982	return -1;
473	adx	30	}
474
475			/* Setup corefile size immediately after boot -kre */
476			setup_corefile();
477
478	michael	5545	/* Save server boot time right away, so getrusage works correctly */
479	adx	30	set_time();
480
481	michael	5545	/* It's not random, but it ought to be a little harder to guess */
482	michael	982	init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
483
484	michael	5545	dlinkAdd(&me, &me.node, &global_client_list);
485
486	michael	4340	ConfigGeneral.dpath = DPATH;
487			ConfigGeneral.spath = SPATH;
488			ConfigGeneral.mpath = MPATH;
489			ConfigGeneral.configfile = CPATH; /* Server configuration file */
490			ConfigGeneral.klinefile = KPATH; /* Server kline file */
491			ConfigGeneral.glinefile = GPATH; /* Server gline file */
492			ConfigGeneral.xlinefile = XPATH; /* Server xline file */
493			ConfigGeneral.dlinefile = DLPATH; /* dline file */
494			ConfigGeneral.resvfile = RESVPATH; /* resv file */
495	michael	1702
496	adx	30	myargv = argv;
497	michael	5723	umask(077); /* umask 077: u=rwx,g=,o= */
498	adx	30
499			parseargs(&argc, &argv, myopts);
500
501			if (printVersion)
502			{
503	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
504	adx	30	exit(EXIT_SUCCESS);
505			}
506
507	michael	4340	if (chdir(ConfigGeneral.dpath))
508	adx	30	{
509			perror("chdir");
510			exit(EXIT_FAILURE);
511			}
512
513	michael	1798	ssl_init();
514	adx	30
515			if (!server_state.foreground)
516			{
517			make_daemon();
518			close_standard_fds(); /* this needs to be before init_netio()! */
519			}
520			else
521			print_startup(getpid());
522
523			setup_signals();
524
525			/* We need this to initialise the fd array before anything else */
526			fdlist_init();
527	michael	1831	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
528	michael	4415
529	michael	2632	init_netio(); /* This needs to be setup early ! -- adrian */
530	michael	2253
531	adx	30	/* Check if there is pidfile and daemon already running */
532			check_pidfile(pidFileName);
533
534	michael	1654	mp_pool_init();
535	adx	30	init_dlink_nodes();
536	michael	2159	init_isupport();
537	adx	30	dbuf_init();
538	michael	1798	hash_init();
539	michael	4319	ipcache_init();
540	michael	1798	client_init();
541	michael	1632	class_init();
542	michael	1358	whowas_init();
543	michael	876	watch_init();
544	michael	1798	auth_init(); /* Initialise the auth code */
545	michael	998	init_resolver(); /* Needs to be setup before the io loop */
546	michael	1404	modules_init();
547	adx	30	read_conf_files(1); /* cold start init conf files */
548			init_uid();
549			initialize_server_capabs(); /* Set up default_server_capabs */
550	michael	5489	initialize_global_set_options(); /* Has to be called after read_conf_files() */
551	michael	1798	channel_init();
552	michael	2216	read_links_file();
553	michael	2150	motd_init();
554	michael	5392	user_usermodes_init();
555	michael	1858	#ifdef HAVE_LIBGEOIP
556			geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
557			#endif
558	adx	30
559	michael	4340	if (EmptyString(ConfigServerInfo.sid))
560	adx	30	{
561	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
562	adx	30	exit(EXIT_FAILURE);
563			}
564	michael	885
565	michael	4340	strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
566	michael	1115
567	michael	4340	if (EmptyString(ConfigServerInfo.name))
568	michael	1115	{
569	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
570	michael	1115	exit(EXIT_FAILURE);
571			}
572
573	michael	4340	strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
574	adx	30
575			/* serverinfo{} description must exist. If not, error out.*/
576	michael	4340	if (EmptyString(ConfigServerInfo.description))
577	adx	30	{
578	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
579	adx	30	exit(EXIT_FAILURE);
580			}
581	michael	885
582	michael	4340	strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
583	adx	30
584	michael	5545	me.from = &me;
585			me.servptr = &me;
586			me.connection->lasttime = CurrentTime;
587			me.connection->since = CurrentTime;
588	michael	4588	me.connection->firsttime = CurrentTime;
589	adx	30
590			SetMe(&me);
591			make_server(&me);
592
593	michael	1115	hash_add_id(&me);
594	adx	30	hash_add_client(&me);
595	michael	2916
596	michael	4209	dlinkAdd(&me, make_dlink_node(), &global_server_list);
597	adx	30
598	michael	1622	load_kline_database();
599			load_dline_database();
600			load_gline_database();
601			load_xline_database();
602			load_resv_database();
603
604	adx	30	load_all_modules(1);
605			load_conf_modules();
606			load_core_modules(1);
607	michael	1115
608	adx	30	write_pidfile(pidFileName);
609
610	michael	1247	ilog(LOG_TYPE_IRCD, "Server Ready");
611	adx	30
612	michael	4094	event_addish(&event_cleanup_glines, NULL);
613			event_addish(&event_cleanup_tklines, NULL);
614	adx	30
615			/* We want try_connections to be called as soon as possible now! -- adrian */
616			/* No, 'cause after a restart it would cause all sorts of nick collides */
617	michael	4094	event_addish(&event_try_connections, NULL);
618	adx	30
619			/* Setup the timeout check. I'll shift it later :) -- adrian */
620	michael	4399	event_add(&event_comm_checktimeouts, NULL);
621	adx	30
622	michael	4094	event_addish(&event_save_all_databases, NULL);
623	michael	1625
624	adx	30	if (ConfigServerHide.links_delay > 0)
625	michael	4094	{
626			event_write_links_file.when = ConfigServerHide.links_delay;
627			event_addish(&event_write_links_file, NULL);
628			}
629	adx	30	else
630			ConfigServerHide.links_disabled = 1;
631
632			if (splitmode)
633	michael	4133	event_addish(&splitmode_event, NULL);
634	adx	30
635			io_loop();
636	michael	885	return 0;
637	adx	30	}