trunk/src/ircd.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2016 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 "id.h"
#include "irc_string.h"
#include "ircd_signal.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"
#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"
#include "isupport.h"
#include "userhost.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;

static int printVersion;

static struct lgetopt myopts[] =
{
  { "configfile", &ConfigGeneral.configfile,
   STRING, "File to use for ircd.conf" },
  { "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 },
};

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,
};


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

  if (gettimeofday(&newtime, NULL) == -1)
  {
    char buf[IRCD_BUFSIZE];

    snprintf(buf, sizeof(buf), "Clock failure, TS can be corrupted: %s",
             strerror(errno));
    server_die(buf, SERVER_SHUTDOWN);
  }

  if (newtime.tv_sec < CurrentTime)
  {
    ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%ju < %ju)",
         newtime.tv_sec, CurrentTime);
    sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
                         "System clock is running backwards - (%ju < %ju)",
                         newtime.tv_sec, CurrentTime);
    event_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_SERVNOTICE, 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;
  GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
}

/* initialize_server_capabs()
 *
 * inputs       - none
 * output       - none
 */
static void
initialize_server_capabs(void)
{
  add_capability("QS", CAPAB_QS);
  add_capability("EOB", CAPAB_EOB);
  add_capability("CLUSTER", CAPAB_CLUSTER);
  add_capability("SVS", CAPAB_SVS);
  add_capability("CHW", CAPAB_CHW);
  add_capability("HOPS", CAPAB_HOPS);
}

/* 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 buf[IRCD_BUFSIZE];
    unsigned int pid = (unsigned int)getpid();

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

    if (fputs(buf, 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 buf[IRCD_BUFSIZE];

  if ((fb = fopen(filename, "r")))
  {
    if (!fgets(buf, 20, fb))
      ilog(LOG_TYPE_IRCD, "Error reading from pid file %s: %s",
           filename, strerror(errno));
    else
    {
      pid_t pid = atoi(buf);

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

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

/* 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

/* ssl_init()
 *
 * 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 */
}

/*
 * 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();
}

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)));

  ConfigGeneral.dpath      = DPATH;
  ConfigGeneral.spath      = SPATH;
  ConfigGeneral.mpath      = MPATH;
  ConfigGeneral.configfile = CPATH;    /* Server configuration file */
  ConfigGeneral.klinefile  = KPATH;    /* Server kline 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();
  isupport_init();
  dbuf_init();
  hash_init();
  userhost_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 */
  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_modes_init();
#ifdef HAVE_LIBGEOIP
  geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
#endif

  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));

  if (EmptyString(ConfigServerInfo.sid))
  {
    ilog(LOG_TYPE_IRCD, "Generating server ID");
    generate_sid();
  }
  else
    strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));

  init_uid();

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

  load_kline_database(ConfigGeneral.klinefile);
  load_dline_database(ConfigGeneral.dlinefile);
  load_xline_database(ConfigGeneral.xlinefile);
  load_resv_database(ConfigGeneral.resvfile);

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

  write_pidfile(pidFileName);

  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.flatten_links_delay && event_write_links_file.active == 0)
  {
    event_write_links_file.when = ConfigServerHide.flatten_links_delay;
    event_add(&event_write_links_file, NULL);
  }

  ilog(LOG_TYPE_IRCD, "Server Ready");
  io_loop();

  return 0;
}
Revision:	7006
Committed:	Fri Jan 1 00:07:54 2016 UTC (9 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	15618 byte(s)
Log Message:	- Update copyright years
#	User	Rev	Content
1	adx	30	/*
2	michael	2916	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	7006	* Copyright (c) 1997-2016 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	michael	6161	#include "id.h"
37	adx	30	#include "irc_string.h"
38			#include "ircd_signal.h"
39			#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	6481	#include "server.h"
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	michael	6185	#include "isupport.h"
61	michael	6393	#include "userhost.h"
62	adx	30
63	michael	1858
64			#ifdef HAVE_LIBGEOIP
65			GeoIP *geoip_ctx;
66			#endif
67	michael	2872
68	michael	5737	struct SetOptions GlobalSetOptions; /* /quote set variables */
69	michael	5602	struct Counter Count;
70			struct ServerState_t server_state;
71			struct ServerStatistics ServerStats;
72	adx	30	struct timeval SystemTime;
73	michael	5737	struct Connection meConnection; /* That's also part of me */
74	michael	5470	struct Client me = { .connection = &meConnection }; /* That's me */
75	adx	30
76	michael	5460	char **myargv;
77	adx	30	const char *logFileName = LPATH;
78			const char *pidFileName = PPATH;
79
80	michael	5460	unsigned int dorehash;
81			unsigned int doremotd;
82	adx	30
83	michael	6735	static int printVersion;
84
85			static struct lgetopt myopts[] =
86			{
87			{ "configfile", &ConfigGeneral.configfile,
88			STRING, "File to use for ircd.conf" },
89			{ "klinefile", &ConfigGeneral.klinefile,
90			STRING, "File to use for kline database" },
91			{ "dlinefile", &ConfigGeneral.dlinefile,
92			STRING, "File to use for dline database" },
93			{ "xlinefile", &ConfigGeneral.xlinefile,
94			STRING, "File to use for xline database" },
95			{ "resvfile", &ConfigGeneral.resvfile,
96			STRING, "File to use for resv database" },
97			{ "logfile", &logFileName,
98			STRING, "File to use for ircd.log" },
99			{ "pidfile", &pidFileName,
100			STRING, "File to use for process ID" },
101			{ "foreground", &server_state.foreground,
102			YESNO, "Run in foreground (don't detach)" },
103			{ "version", &printVersion,
104			YESNO, "Print version and exit" },
105			{ "help", NULL, USAGE, "Print this text" },
106			{ NULL, NULL, STRING, NULL },
107			};
108
109	michael	4094	static struct event event_cleanup_tklines =
110			{
111			.name = "cleanup_tklines",
112			.handler = cleanup_tklines,
113			.when = CLEANUP_TKLINES_TIME
114			};
115
116			static struct event event_try_connections =
117			{
118			.name = "try_connections",
119			.handler = try_connections,
120			.when = STARTUP_CONNECTIONS_TIME
121			};
122
123			static struct event event_comm_checktimeouts =
124			{
125			.name = "comm_checktimeouts",
126			.handler = comm_checktimeouts,
127			.when = 1
128			};
129
130			static struct event event_save_all_databases =
131			{
132			.name = "save_all_databases",
133			.handler = save_all_databases,
134			.when = DATABASE_UPDATE_TIMEOUT
135			};
136
137			struct event event_write_links_file =
138			{
139			.name = "write_links_file",
140			.handler = write_links_file,
141			};
142
143
144	adx	30	void
145			set_time(void)
146			{
147	michael	2978	struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
148	adx	30
149			if (gettimeofday(&newtime, NULL) == -1)
150			{
151	michael	6482	char buf[IRCD_BUFSIZE];
152
153			snprintf(buf, sizeof(buf), "Clock failure, TS can be corrupted: %s",
154			strerror(errno));
155			server_die(buf, SERVER_SHUTDOWN);
156	adx	30	}
157
158			if (newtime.tv_sec < CurrentTime)
159			{
160	michael	6782	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%ju < %ju)",
161			newtime.tv_sec, CurrentTime);
162	michael	2980	sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
163	michael	6782	"System clock is running backwards - (%ju < %ju)",
164	michael	6802	newtime.tv_sec, CurrentTime);
165	michael	6370	event_set_back_events(CurrentTime - newtime.tv_sec);
166	adx	30	}
167
168	michael	6481	SystemTime.tv_sec = newtime.tv_sec;
169	adx	30	SystemTime.tv_usec = newtime.tv_usec;
170			}
171
172			static void
173			io_loop(void)
174			{
175	michael	3215	while (1)
176	adx	30	{
177			if (listing_client_list.head)
178			{
179	michael	4815	dlink_node node = NULL, node_next = NULL;
180			DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
181			safe_list_channels(node->data, 0);
182	adx	30	}
183
184	michael	4094	/* Run pending events */
185			event_run();
186	adx	30
187			comm_select();
188			exit_aborted_clients();
189			free_exited_clients();
190
191	michael	6735	/* Check to see whether we have to rehash the configuration. */
192	adx	30	if (dorehash)
193			{
194	michael	4982	conf_rehash(1);
195	adx	30	dorehash = 0;
196			}
197	michael	3215
198	adx	30	if (doremotd)
199			{
200	michael	2150	motd_recache();
201	michael	6318	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
202	michael	3065	"Got signal SIGUSR1, reloading motd file(s)");
203	adx	30	doremotd = 0;
204			}
205			}
206			}
207
208			/* initalialize_global_set_options()
209			*
210			* inputs - none
211			* output - none
212	michael	2916	* side effects - This sets all global set options needed
213	adx	30	*/
214			static void
215			initialize_global_set_options(void)
216			{
217	michael	5489	GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
218	michael	5499	GlobalSetOptions.autoconn = 1;
219	adx	30	GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
220	michael	5499	GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
221			GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
222	michael	5489	GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
223			GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
224	adx	30	GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
225			}
226
227			/* initialize_server_capabs()
228			*
229			* inputs - none
230			* output - none
231			*/
232			static void
233			initialize_server_capabs(void)
234			{
235	michael	6354	add_capability("QS", CAPAB_QS);
236			add_capability("EOB", CAPAB_EOB);
237			add_capability("CLUSTER", CAPAB_CLUSTER);
238			add_capability("SVS", CAPAB_SVS);
239			add_capability("CHW", CAPAB_CHW);
240			add_capability("HOPS", CAPAB_HOPS);
241	adx	30	}
242
243			/* write_pidfile()
244			*
245			* inputs - filename+path of pid file
246			* output - NONE
247			* side effects - write the pid of the ircd to filename
248			*/
249			static void
250			write_pidfile(const char *filename)
251			{
252	michael	1325	FILE *fb;
253	adx	30
254	michael	1325	if ((fb = fopen(filename, "w")))
255	adx	30	{
256	michael	6470	char buf[IRCD_BUFSIZE];
257	adx	30	unsigned int pid = (unsigned int)getpid();
258
259	michael	6470	snprintf(buf, sizeof(buf), "%u\n", pid);
260	michael	1325
261	michael	6470	if (fputs(buf, fb) == -1)
262	michael	5737	ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
263			filename, strerror(errno));
264	adx	30
265	michael	1325	fclose(fb);
266	adx	30	}
267			else
268	michael	5566	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
269	michael	4748	filename, strerror(errno));
270	adx	30	}
271
272			/* check_pidfile()
273			*
274			* inputs - filename+path of pid file
275			* output - none
276			* side effects - reads pid from pidfile and checks if ircd is in process
277			* list. if it is, gracefully exits
278			* -kre
279			*/
280			static void
281			check_pidfile(const char *filename)
282			{
283	michael	1325	FILE *fb;
284	michael	6470	char buf[IRCD_BUFSIZE];
285	adx	30
286	michael	1325	if ((fb = fopen(filename, "r")))
287	adx	30	{
288	michael	6470	if (!fgets(buf, 20, fb))
289	michael	6260	ilog(LOG_TYPE_IRCD, "Error reading from pid file %s: %s",
290			filename, strerror(errno));
291	adx	30	else
292			{
293	michael	6481	pid_t pid = atoi(buf);
294	adx	30
295	michael	6481	if (!kill(pid, 0))
296	adx	30	{
297			/* log(L_ERROR, "Server is already running"); */
298			printf("ircd: daemon is already running\n");
299	michael	6646	exit(EXIT_FAILURE);
300	adx	30	}
301			}
302
303	michael	1325	fclose(fb);
304	adx	30	}
305			else if (errno != ENOENT)
306	michael	6260	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
307			filename, strerror(errno));
308	adx	30	}
309
310			/* setup_corefile()
311			*
312			* inputs - nothing
313			* output - nothing
314			* side effects - setups corefile to system limits.
315			* -kre
316			*/
317			static void
318			setup_corefile(void)
319			{
320			#ifdef HAVE_SYS_RESOURCE_H
321			struct rlimit rlim; /* resource limits */
322
323			/* Set corefilesize to maximum */
324			if (!getrlimit(RLIMIT_CORE, &rlim))
325			{
326			rlim.rlim_cur = rlim.rlim_max;
327			setrlimit(RLIMIT_CORE, &rlim);
328			}
329			#endif
330			}
331
332	michael	2228	#ifdef HAVE_LIBCRYPTO
333			static int
334			always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
335			{
336			return 1;
337			}
338			#endif
339
340	michael	6481	/* ssl_init()
341	adx	30	*
342			* inputs - nothing
343			* output - nothing
344			* side effects - setups SSL context.
345			*/
346			static void
347	michael	1798	ssl_init(void)
348	adx	30	{
349			#ifdef HAVE_LIBCRYPTO
350			SSL_load_error_strings();
351			SSLeay_add_ssl_algorithms();
352
353	michael	4733	if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
354	adx	30	{
355	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
356	adx	30
357	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
358	michael	4763	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s);
359	michael	4497	exit(EXIT_FAILURE);
360	michael	4751	return; /* Not reached */
361	adx	30	}
362
363	michael	4730	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
364	michael	4593	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE\|SSL_OP_CIPHER_SERVER_PREFERENCE);
365	michael	4340	SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
366	michael	2228	always_accept_verify_cb);
367	michael	4730	SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
368	michael	4892	SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");
369	adx	30
370	michael	4744	#if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH)
371	michael	4070	{
372			EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
373
374			if (key)
375			{
376	michael	4340	SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
377	michael	4070	EC_KEY_free(key);
378			}
379			}
380
381	michael	4340	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
382	michael	4070	#endif
383
384	michael	4733	if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
385	michael	1303	{
386	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
387	michael	1303
388	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
389	michael	4763	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s);
390	michael	4497	exit(EXIT_FAILURE);
391	michael	4751	return; /* Not reached */
392	michael	1303	}
393
394	michael	4730	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
395	michael	4340	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
396			SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
397	michael	2228	always_accept_verify_cb);
398	michael	4730	SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
399	adx	30	#endif /* HAVE_LIBCRYPTO */
400			}
401
402	michael	6735	/*
403			* print_startup - print startup information
404			*/
405			static void
406			print_startup(int pid)
407			{
408			printf("ircd: version %s(%s)\n", ircd_version, serno);
409			printf("ircd: pid %d\n", pid);
410			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
411			: "foreground", ConfigGeneral.dpath);
412			}
413
414			static void
415			make_daemon(void)
416			{
417			int pid;
418
419			if ((pid = fork()) < 0)
420			{
421			perror("fork");
422			exit(EXIT_FAILURE);
423			}
424			else if (pid > 0)
425			{
426			print_startup(pid);
427			exit(EXIT_SUCCESS);
428			}
429
430			setsid();
431			}
432
433	adx	30	int
434			main(int argc, char *argv[])
435			{
436	michael	2253	/* Check to see if the user is running us as root, which is a nono */
437	michael	4733	if (!geteuid())
438	adx	30	{
439	michael	3525	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
440	michael	982	return -1;
441	adx	30	}
442
443			/* Setup corefile size immediately after boot -kre */
444			setup_corefile();
445
446	michael	5545	/* Save server boot time right away, so getrusage works correctly */
447	adx	30	set_time();
448
449	michael	5545	/* It's not random, but it ought to be a little harder to guess */
450	michael	982	init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
451
452	michael	4340	ConfigGeneral.dpath = DPATH;
453			ConfigGeneral.spath = SPATH;
454			ConfigGeneral.mpath = MPATH;
455			ConfigGeneral.configfile = CPATH; /* Server configuration file */
456			ConfigGeneral.klinefile = KPATH; /* Server kline file */
457			ConfigGeneral.xlinefile = XPATH; /* Server xline file */
458			ConfigGeneral.dlinefile = DLPATH; /* dline file */
459			ConfigGeneral.resvfile = RESVPATH; /* resv file */
460	michael	1702
461	adx	30	myargv = argv;
462	michael	5723	umask(077); /* umask 077: u=rwx,g=,o= */
463	adx	30
464			parseargs(&argc, &argv, myopts);
465
466			if (printVersion)
467			{
468	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
469	adx	30	exit(EXIT_SUCCESS);
470			}
471
472	michael	4340	if (chdir(ConfigGeneral.dpath))
473	adx	30	{
474			perror("chdir");
475			exit(EXIT_FAILURE);
476			}
477
478	michael	1798	ssl_init();
479	adx	30
480			if (!server_state.foreground)
481			{
482			make_daemon();
483			close_standard_fds(); /* this needs to be before init_netio()! */
484			}
485			else
486			print_startup(getpid());
487
488			setup_signals();
489
490			/* We need this to initialise the fd array before anything else */
491			fdlist_init();
492	michael	1831	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
493	michael	4415
494	michael	2632	init_netio(); /* This needs to be setup early ! -- adrian */
495	michael	2253
496	adx	30	/* Check if there is pidfile and daemon already running */
497			check_pidfile(pidFileName);
498
499	michael	1654	mp_pool_init();
500	adx	30	init_dlink_nodes();
501	michael	6185	isupport_init();
502	adx	30	dbuf_init();
503	michael	1798	hash_init();
504	michael	6393	userhost_init();
505	michael	4319	ipcache_init();
506	michael	1798	client_init();
507	michael	1632	class_init();
508	michael	1358	whowas_init();
509	michael	876	watch_init();
510	michael	1798	auth_init(); /* Initialise the auth code */
511	michael	998	init_resolver(); /* Needs to be setup before the io loop */
512	michael	1404	modules_init();
513	adx	30	read_conf_files(1); /* cold start init conf files */
514			initialize_server_capabs(); /* Set up default_server_capabs */
515	michael	5489	initialize_global_set_options(); /* Has to be called after read_conf_files() */
516	michael	1798	channel_init();
517	michael	2216	read_links_file();
518	michael	2150	motd_init();
519	michael	6189	user_modes_init();
520	michael	1858	#ifdef HAVE_LIBGEOIP
521			geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
522			#endif
523	adx	30
524	michael	4340	if (EmptyString(ConfigServerInfo.name))
525	michael	1115	{
526	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
527	michael	1115	exit(EXIT_FAILURE);
528			}
529
530	michael	4340	strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
531	adx	30
532	michael	6481	/* serverinfo {} description must exist. If not, error out.*/
533	michael	4340	if (EmptyString(ConfigServerInfo.description))
534	adx	30	{
535	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
536	adx	30	exit(EXIT_FAILURE);
537			}
538	michael	885
539	michael	4340	strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
540	adx	30
541	michael	6156	if (EmptyString(ConfigServerInfo.sid))
542			{
543			ilog(LOG_TYPE_IRCD, "Generating server ID");
544			generate_sid();
545			}
546			else
547			strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
548
549	michael	6464	init_uid();
550
551	michael	5545	me.from = &me;
552			me.servptr = &me;
553			me.connection->lasttime = CurrentTime;
554			me.connection->since = CurrentTime;
555	michael	4588	me.connection->firsttime = CurrentTime;
556	adx	30
557			SetMe(&me);
558			make_server(&me);
559
560	michael	1115	hash_add_id(&me);
561	adx	30	hash_add_client(&me);
562	michael	2916
563	michael	4209	dlinkAdd(&me, make_dlink_node(), &global_server_list);
564	michael	6464	dlinkAdd(&me, &me.node, &global_client_list);
565	adx	30
566	michael	6928	load_kline_database(ConfigGeneral.klinefile);
567			load_dline_database(ConfigGeneral.dlinefile);
568			load_xline_database(ConfigGeneral.xlinefile);
569			load_resv_database(ConfigGeneral.resvfile);
570	michael	1622
571	adx	30	load_all_modules(1);
572			load_conf_modules();
573			load_core_modules(1);
574	michael	1115
575	adx	30	write_pidfile(pidFileName);
576
577	michael	4094	event_addish(&event_cleanup_tklines, NULL);
578	adx	30
579			/* We want try_connections to be called as soon as possible now! -- adrian */
580			/* No, 'cause after a restart it would cause all sorts of nick collides */
581	michael	4094	event_addish(&event_try_connections, NULL);
582	adx	30
583			/* Setup the timeout check. I'll shift it later :) -- adrian */
584	michael	4399	event_add(&event_comm_checktimeouts, NULL);
585	adx	30
586	michael	4094	event_addish(&event_save_all_databases, NULL);
587	michael	1625
588	michael	6642	if (ConfigServerHide.flatten_links_delay && event_write_links_file.active == 0)
589	michael	4094	{
590	michael	6597	event_write_links_file.when = ConfigServerHide.flatten_links_delay;
591	michael	6636	event_add(&event_write_links_file, NULL);
592	michael	4094	}
593	adx	30
594	michael	6464	ilog(LOG_TYPE_IRCD, "Server Ready");
595	adx	30	io_loop();
596	michael	6464
597	michael	885	return 0;
598	adx	30	}