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 "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"      /* 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"
#include "isupport.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 splitmode;
unsigned int splitchecking;
unsigned int split_users;
unsigned int split_servers;

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"},
  {"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);
  add_capability("EOB", CAP_EOB);
  add_capability("CLUSTER", CAP_CLUSTER);
  add_capability("SVS", CAP_SVS);
  add_capability("CHW", CAP_CHW);
  add_capability("HOPS", CAP_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 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.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();
  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));
  }

  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);

  init_uid();

  load_kline_database();
  load_dline_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_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:	6189
Committed:	Wed Jun 24 17:56:29 2015 UTC (10 years, 2 months ago) by michael
Content type:	text/x-csrc
File size:	16271 byte(s)
Log Message:	- Rename user_usermodes_init() to user_modes_init()
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2015 ircd-hybrid development team
5	*
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	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	* USA
20	*/
21
22	/*! \file ircd.c
23	* \brief Starts up and runs the ircd.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "user.h"
29	#include "list.h"
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 "id.h"
37	#include "irc_string.h"
38	#include "ircd_signal.h"
39	#include "motd.h"
40	#include "conf.h"
41	#include "hostmask.h"
42	#include "parse.h"
43	#include "res.h"
44	#include "restart.h"
45	#include "rng_mt.h"
46	#include "auth.h"
47	#include "s_bsd.h"
48	#include "log.h"
49	#include "server.h" /* try_connections */
50	#include "send.h"
51	#include "whowas.h"
52	#include "modules.h"
53	#include "memory.h"
54	#include "mempool.h"
55	#include "ircd_getopt.h"
56	#include "watch.h"
57	#include "conf_db.h"
58	#include "conf_class.h"
59	#include "ipcache.h"
60	#include "isupport.h"
61
62
63	#ifdef HAVE_LIBGEOIP
64	GeoIP *geoip_ctx;
65	#endif
66
67	struct SetOptions GlobalSetOptions; /* /quote set variables */
68	struct Counter Count;
69	struct ServerState_t server_state;
70	struct ServerStatistics ServerStats;
71	struct timeval SystemTime;
72	struct Connection meConnection; /* That's also part of me */
73	struct Client me = { .connection = &meConnection }; /* That's me */
74
75	char **myargv;
76	const char *logFileName = LPATH;
77	const char *pidFileName = PPATH;
78
79	unsigned int dorehash;
80	unsigned int doremotd;
81	unsigned int splitmode;
82	unsigned int splitchecking;
83	unsigned int split_users;
84	unsigned int split_servers;
85
86	static struct event event_cleanup_tklines =
87	{
88	.name = "cleanup_tklines",
89	.handler = cleanup_tklines,
90	.when = CLEANUP_TKLINES_TIME
91	};
92
93	static struct event event_try_connections =
94	{
95	.name = "try_connections",
96	.handler = try_connections,
97	.when = STARTUP_CONNECTIONS_TIME
98	};
99
100	static struct event event_comm_checktimeouts =
101	{
102	.name = "comm_checktimeouts",
103	.handler = comm_checktimeouts,
104	.when = 1
105	};
106
107	static struct event event_save_all_databases =
108	{
109	.name = "save_all_databases",
110	.handler = save_all_databases,
111	.when = DATABASE_UPDATE_TIMEOUT
112	};
113
114	struct event event_write_links_file =
115	{
116	.name = "write_links_file",
117	.handler = write_links_file,
118	};
119
120
121	/*
122	* print_startup - print startup information
123	*/
124	static void
125	print_startup(int pid)
126	{
127	printf("ircd: version %s(%s)\n", ircd_version, serno);
128	printf("ircd: pid %d\n", pid);
129	printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
130	: "foreground", ConfigGeneral.dpath);
131	}
132
133	static void
134	make_daemon(void)
135	{
136	int pid;
137
138	if ((pid = fork()) < 0)
139	{
140	perror("fork");
141	exit(EXIT_FAILURE);
142	}
143	else if (pid > 0)
144	{
145	print_startup(pid);
146	exit(EXIT_SUCCESS);
147	}
148
149	setsid();
150	}
151
152	static int printVersion = 0;
153
154	static struct lgetopt myopts[] =
155	{
156	{"configfile", &ConfigGeneral.configfile,
157	STRING, "File to use for ircd.conf"},
158	{"klinefile", &ConfigGeneral.klinefile,
159	STRING, "File to use for kline database"},
160	{"dlinefile", &ConfigGeneral.dlinefile,
161	STRING, "File to use for dline database"},
162	{"xlinefile", &ConfigGeneral.xlinefile,
163	STRING, "File to use for xline database"},
164	{"resvfile", &ConfigGeneral.resvfile,
165	STRING, "File to use for resv database"},
166	{"logfile", &logFileName,
167	STRING, "File to use for ircd.log"},
168	{"pidfile", &pidFileName,
169	STRING, "File to use for process ID"},
170	{"foreground", &server_state.foreground,
171	YESNO, "Run in foreground (don't detach)"},
172	{"version", &printVersion,
173	YESNO, "Print version and exit"},
174	{"help", NULL, USAGE, "Print this text"},
175	{NULL, NULL, STRING, NULL},
176	};
177
178	void
179	set_time(void)
180	{
181	struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
182
183	if (gettimeofday(&newtime, NULL) == -1)
184	{
185	ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
186	strerror(errno));
187	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
188	"Clock Failure (%s), TS can be corrupted",
189	strerror(errno));
190	server_die("Clock Failure", 1);
191	}
192
193	if (newtime.tv_sec < CurrentTime)
194	{
195	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
196	(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
197	sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
198	"System clock is running backwards - (%lu < %lu)",
199	(unsigned long)newtime.tv_sec,
200	(unsigned long)CurrentTime);
201	set_back_events(CurrentTime - newtime.tv_sec);
202	}
203
204	SystemTime.tv_sec = newtime.tv_sec;
205	SystemTime.tv_usec = newtime.tv_usec;
206	}
207
208	static void
209	io_loop(void)
210	{
211	while (1)
212	{
213	if (listing_client_list.head)
214	{
215	dlink_node node = NULL, node_next = NULL;
216	DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
217	safe_list_channels(node->data, 0);
218	}
219
220	/* Run pending events */
221	event_run();
222
223	comm_select();
224	exit_aborted_clients();
225	free_exited_clients();
226
227	/* Check to see whether we have to rehash the configuration .. */
228	if (dorehash)
229	{
230	conf_rehash(1);
231	dorehash = 0;
232	}
233
234	if (doremotd)
235	{
236	motd_recache();
237	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
238	"Got signal SIGUSR1, reloading motd file(s)");
239	doremotd = 0;
240	}
241	}
242	}
243
244	/* initalialize_global_set_options()
245	*
246	* inputs - none
247	* output - none
248	* side effects - This sets all global set options needed
249	*/
250	static void
251	initialize_global_set_options(void)
252	{
253	GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
254	GlobalSetOptions.autoconn = 1;
255	GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
256	GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
257	GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
258	GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
259	GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
260
261	split_servers = ConfigChannel.default_split_server_count;
262	split_users = ConfigChannel.default_split_user_count;
263
264	if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
265	ConfigChannel.no_join_on_split))
266	{
267	splitmode = 1;
268	splitchecking = 1;
269	}
270
271	GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
272	}
273
274	/* initialize_server_capabs()
275	*
276	* inputs - none
277	* output - none
278	*/
279	static void
280	initialize_server_capabs(void)
281	{
282	add_capability("QS", CAP_QS);
283	add_capability("EOB", CAP_EOB);
284	add_capability("CLUSTER", CAP_CLUSTER);
285	add_capability("SVS", CAP_SVS);
286	add_capability("CHW", CAP_CHW);
287	add_capability("HOPS", CAP_HOPS);
288	}
289
290	/* write_pidfile()
291	*
292	* inputs - filename+path of pid file
293	* output - NONE
294	* side effects - write the pid of the ircd to filename
295	*/
296	static void
297	write_pidfile(const char *filename)
298	{
299	FILE *fb;
300
301	if ((fb = fopen(filename, "w")))
302	{
303	char buff[IRCD_BUFSIZE];
304	unsigned int pid = (unsigned int)getpid();
305
306	snprintf(buff, sizeof(buff), "%u\n", pid);
307
308	if (fputs(buff, fb) == -1)
309	ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
310	filename, strerror(errno));
311
312	fclose(fb);
313	}
314	else
315	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
316	filename, strerror(errno));
317	}
318
319	/* check_pidfile()
320	*
321	* inputs - filename+path of pid file
322	* output - none
323	* side effects - reads pid from pidfile and checks if ircd is in process
324	* list. if it is, gracefully exits
325	* -kre
326	*/
327	static void
328	check_pidfile(const char *filename)
329	{
330	FILE *fb;
331	char buff[IRCD_BUFSIZE];
332	pid_t pidfromfile;
333
334	/* Don't do logging here, since we don't have log() initialised */
335	if ((fb = fopen(filename, "r")))
336	{
337	if (!fgets(buff, 20, fb))
338	{
339	/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
340	* strerror(errno));
341	*/
342	}
343	else
344	{
345	pidfromfile = atoi(buff);
346
347	if (!kill(pidfromfile, 0))
348	{
349	/* log(L_ERROR, "Server is already running"); */
350	printf("ircd: daemon is already running\n");
351	exit(-1);
352	}
353	}
354
355	fclose(fb);
356	}
357	else if (errno != ENOENT)
358	{
359	/* log(L_ERROR, "Error opening pid file %s", filename); */
360	}
361	}
362
363	/* setup_corefile()
364	*
365	* inputs - nothing
366	* output - nothing
367	* side effects - setups corefile to system limits.
368	* -kre
369	*/
370	static void
371	setup_corefile(void)
372	{
373	#ifdef HAVE_SYS_RESOURCE_H
374	struct rlimit rlim; /* resource limits */
375
376	/* Set corefilesize to maximum */
377	if (!getrlimit(RLIMIT_CORE, &rlim))
378	{
379	rlim.rlim_cur = rlim.rlim_max;
380	setrlimit(RLIMIT_CORE, &rlim);
381	}
382	#endif
383	}
384
385	#ifdef HAVE_LIBCRYPTO
386	static int
387	always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
388	{
389	return 1;
390	}
391	#endif
392
393	/* init_ssl()
394	*
395	* inputs - nothing
396	* output - nothing
397	* side effects - setups SSL context.
398	*/
399	static void
400	ssl_init(void)
401	{
402	#ifdef HAVE_LIBCRYPTO
403	SSL_load_error_strings();
404	SSLeay_add_ssl_algorithms();
405
406	if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
407	{
408	const char *s = ERR_lib_error_string(ERR_get_error());
409
410	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
411	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s);
412	exit(EXIT_FAILURE);
413	return; /* Not reached */
414	}
415
416	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
417	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE\|SSL_OP_CIPHER_SERVER_PREFERENCE);
418	SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
419	always_accept_verify_cb);
420	SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
421	SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");
422
423	#if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH)
424	{
425	EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
426
427	if (key)
428	{
429	SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
430	EC_KEY_free(key);
431	}
432	}
433
434	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
435	#endif
436
437	if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
438	{
439	const char *s = ERR_lib_error_string(ERR_get_error());
440
441	fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
442	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s);
443	exit(EXIT_FAILURE);
444	return; /* Not reached */
445	}
446
447	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
448	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
449	SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
450	always_accept_verify_cb);
451	SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
452	#endif /* HAVE_LIBCRYPTO */
453	}
454
455	int
456	main(int argc, char *argv[])
457	{
458	/* Check to see if the user is running us as root, which is a nono */
459	if (!geteuid())
460	{
461	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
462	return -1;
463	}
464
465	/* Setup corefile size immediately after boot -kre */
466	setup_corefile();
467
468	/* Save server boot time right away, so getrusage works correctly */
469	set_time();
470
471	/* It's not random, but it ought to be a little harder to guess */
472	init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
473
474	dlinkAdd(&me, &me.node, &global_client_list);
475
476	ConfigGeneral.dpath = DPATH;
477	ConfigGeneral.spath = SPATH;
478	ConfigGeneral.mpath = MPATH;
479	ConfigGeneral.configfile = CPATH; /* Server configuration file */
480	ConfigGeneral.klinefile = KPATH; /* Server kline file */
481	ConfigGeneral.xlinefile = XPATH; /* Server xline file */
482	ConfigGeneral.dlinefile = DLPATH; /* dline file */
483	ConfigGeneral.resvfile = RESVPATH; /* resv file */
484
485	myargv = argv;
486	umask(077); /* umask 077: u=rwx,g=,o= */
487
488	parseargs(&argc, &argv, myopts);
489
490	if (printVersion)
491	{
492	printf("ircd: version %s(%s)\n", ircd_version, serno);
493	exit(EXIT_SUCCESS);
494	}
495
496	if (chdir(ConfigGeneral.dpath))
497	{
498	perror("chdir");
499	exit(EXIT_FAILURE);
500	}
501
502	ssl_init();
503
504	if (!server_state.foreground)
505	{
506	make_daemon();
507	close_standard_fds(); /* this needs to be before init_netio()! */
508	}
509	else
510	print_startup(getpid());
511
512	setup_signals();
513
514	/* We need this to initialise the fd array before anything else */
515	fdlist_init();
516	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
517
518	init_netio(); /* This needs to be setup early ! -- adrian */
519
520	/* Check if there is pidfile and daemon already running */
521	check_pidfile(pidFileName);
522
523	mp_pool_init();
524	init_dlink_nodes();
525	isupport_init();
526	dbuf_init();
527	hash_init();
528	ipcache_init();
529	client_init();
530	class_init();
531	whowas_init();
532	watch_init();
533	auth_init(); /* Initialise the auth code */
534	init_resolver(); /* Needs to be setup before the io loop */
535	modules_init();
536	read_conf_files(1); /* cold start init conf files */
537	initialize_server_capabs(); /* Set up default_server_capabs */
538	initialize_global_set_options(); /* Has to be called after read_conf_files() */
539	channel_init();
540	read_links_file();
541	motd_init();
542	user_modes_init();
543	#ifdef HAVE_LIBGEOIP
544	geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
545	#endif
546
547	if (EmptyString(ConfigServerInfo.name))
548	{
549	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
550	exit(EXIT_FAILURE);
551	}
552
553	strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
554
555	/* serverinfo{} description must exist. If not, error out.*/
556	if (EmptyString(ConfigServerInfo.description))
557	{
558	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
559	exit(EXIT_FAILURE);
560	}
561
562	strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
563
564	if (EmptyString(ConfigServerInfo.sid))
565	{
566	ilog(LOG_TYPE_IRCD, "Generating server ID");
567	generate_sid();
568	}
569	else
570	{
571	strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
572	}
573
574	me.from = &me;
575	me.servptr = &me;
576	me.connection->lasttime = CurrentTime;
577	me.connection->since = CurrentTime;
578	me.connection->firsttime = CurrentTime;
579
580	SetMe(&me);
581	make_server(&me);
582
583	hash_add_id(&me);
584	hash_add_client(&me);
585
586	dlinkAdd(&me, make_dlink_node(), &global_server_list);
587
588	init_uid();
589
590	load_kline_database();
591	load_dline_database();
592	load_xline_database();
593	load_resv_database();
594
595	load_all_modules(1);
596	load_conf_modules();
597	load_core_modules(1);
598
599	write_pidfile(pidFileName);
600
601	ilog(LOG_TYPE_IRCD, "Server Ready");
602
603	event_addish(&event_cleanup_tklines, NULL);
604
605	/* We want try_connections to be called as soon as possible now! -- adrian */
606	/* No, 'cause after a restart it would cause all sorts of nick collides */
607	event_addish(&event_try_connections, NULL);
608
609	/* Setup the timeout check. I'll shift it later :) -- adrian */
610	event_add(&event_comm_checktimeouts, NULL);
611
612	event_addish(&event_save_all_databases, NULL);
613
614	if (ConfigServerHide.links_delay > 0)
615	{
616	event_write_links_file.when = ConfigServerHide.links_delay;
617	event_addish(&event_write_links_file, NULL);
618	}
619	else
620	ConfigServerHide.links_disabled = 1;
621
622	if (splitmode)
623	event_addish(&splitmode_event, NULL);
624
625	io_loop();
626	return 0;
627	}