trunk/src/ircd.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2014 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  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 ServerStatistics ServerStats;
struct timeval SystemTime;
struct Client me;             /* That's me */
struct LocalUser meLocalUser; /* That's also part of me */

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

char **myargv;

int dorehash = 0;
int doremotd = 0;

/* Set to zero because it should be initialized later using
 * initialize_server_capabs
 */
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 *ptr = NULL, *ptr_next = NULL;
      DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
        safe_list_channels(ptr->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)
    {
      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.autoconn  = 1;
  GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
  GlobalSetOptions.spam_num  = MAX_JOIN_LEAVE_COUNT;

  if (ConfigGeneral.default_floodcount)
    GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
  else
    GlobalSetOptions.floodcount = 10;

  /* XXX I have no idea what to try here - Dianora */
  GlobalSetOptions.joinfloodcount = 16;
  GlobalSetOptions.joinfloodtime = 8;

  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 %u to pid file %s (%s)",
           pid, filename, strerror(errno));

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

/* 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) == NULL)
    {
      /* 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
  const unsigned char session_id[] = "ircd-hybrid";

  SSL_load_error_strings();
  SSLeay_add_ssl_algorithms();

  if ((ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
  {
    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\n", s);
  }

  SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3);
  SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE);
  SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
                     always_accept_verify_cb);
  SSL_CTX_set_session_id_context(ConfigServerInfo.server_ctx, session_id, sizeof(session_id) - 1);

#if OPENSSL_VERSION_NUMBER >= 0x1000005FL && !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())) == NULL)
  {
    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\n", s);
  }

  SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3);
  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);
#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() == 0)
  {
    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 ain't random, but it ought to be a little harder to guess */
  init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));

  me.localClient = &meLocalUser;
  dlinkAdd(&me, &me.node, &global_client_list);  /* Pointer to beginning
                                                   of Client list */
  ConfigLog.use_logging = 1;
  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);                /* better safe than sorry --SRB */

  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);
  check_can_use_v6();
  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();
  init_host_hash();          /* Host-hashtable. */
  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();
  channel_init();
  read_links_file();
  motd_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.localClient->lasttime  = CurrentTime;
  me.localClient->since     = CurrentTime;
  me.localClient->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();

  if (chdir(MODPATH))
  {
    ilog(LOG_TYPE_IRCD, "Could not load core modules. Terminating!");
    exit(EXIT_FAILURE);
  }

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

  /* Go back to DPATH after checking to see if we can chdir to MODPATH */
  if (chdir(ConfigGeneral.dpath))
  {
    perror("chdir");
    exit(EXIT_FAILURE);
  }

  /*
   * assemble_umode_buffer() has to be called after
   * reading conf/loading modules.
   */
  assemble_umode_buffer();

  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:	4399
Committed:	Mon Aug 4 19:35:36 2014 UTC (11 years ago) by michael
Content type:	text/x-csrc
File size:	16979 byte(s)
Log Message:	- ircd.c:main(): use event_add() for comm_checktimeouts
#	User	Rev	Content
1	adx	30	/*
2	michael	2916	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	2916	* Copyright (c) 1997-2014 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			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19			* 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	896	struct ServerStatistics ServerStats;
67	adx	30	struct timeval SystemTime;
68			struct Client me; /* That's me */
69			struct LocalUser meLocalUser; /* That's also part of me */
70
71			const char *logFileName = LPATH;
72			const char *pidFileName = PPATH;
73
74			char **myargv;
75
76			int dorehash = 0;
77			int doremotd = 0;
78
79			/* Set to zero because it should be initialized later using
80			* initialize_server_capabs
81			*/
82	michael	3907	unsigned int default_server_capabs;
83	michael	1013	unsigned int splitmode;
84			unsigned int splitchecking;
85			unsigned int split_users;
86	adx	30	unsigned int split_servers;
87
88	michael	4094	static struct event event_cleanup_glines =
89			{
90			.name = "cleanup_glines",
91			.handler = cleanup_glines,
92			.when = CLEANUP_GLINES_TIME
93			};
94
95			static struct event event_cleanup_tklines =
96			{
97			.name = "cleanup_tklines",
98			.handler = cleanup_tklines,
99			.when = CLEANUP_TKLINES_TIME
100			};
101
102			static struct event event_try_connections =
103			{
104			.name = "try_connections",
105			.handler = try_connections,
106			.when = STARTUP_CONNECTIONS_TIME
107			};
108
109			static struct event event_comm_checktimeouts =
110			{
111			.name = "comm_checktimeouts",
112			.handler = comm_checktimeouts,
113			.when = 1
114			};
115
116			static struct event event_save_all_databases =
117			{
118			.name = "save_all_databases",
119			.handler = save_all_databases,
120			.when = DATABASE_UPDATE_TIMEOUT
121			};
122
123			struct event event_write_links_file =
124			{
125			.name = "write_links_file",
126			.handler = write_links_file,
127			};
128
129
130	adx	30	/*
131			* print_startup - print startup information
132			*/
133			static void
134			print_startup(int pid)
135			{
136	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
137	adx	30	printf("ircd: pid %d\n", pid);
138			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
139	michael	4340	: "foreground", ConfigGeneral.dpath);
140	adx	30	}
141
142			static void
143			make_daemon(void)
144			{
145			int pid;
146
147			if ((pid = fork()) < 0)
148			{
149			perror("fork");
150			exit(EXIT_FAILURE);
151			}
152			else if (pid > 0)
153			{
154			print_startup(pid);
155			exit(EXIT_SUCCESS);
156			}
157
158			setsid();
159			}
160
161			static int printVersion = 0;
162
163	michael	3215	static struct lgetopt myopts[] =
164			{
165	michael	4340	{"configfile", &ConfigGeneral.configfile,
166	adx	30	STRING, "File to use for ircd.conf"},
167	michael	4340	{"glinefile", &ConfigGeneral.glinefile,
168	michael	1718	STRING, "File to use for gline database"},
169	michael	4340	{"klinefile", &ConfigGeneral.klinefile,
170	michael	1718	STRING, "File to use for kline database"},
171	michael	4340	{"dlinefile", &ConfigGeneral.dlinefile,
172	michael	1718	STRING, "File to use for dline database"},
173	michael	4340	{"xlinefile", &ConfigGeneral.xlinefile,
174	michael	1718	STRING, "File to use for xline database"},
175	michael	4340	{"resvfile", &ConfigGeneral.resvfile,
176	michael	1718	STRING, "File to use for resv database"},
177	michael	2916	{"logfile", &logFileName,
178	adx	30	STRING, "File to use for ircd.log"},
179			{"pidfile", &pidFileName,
180			STRING, "File to use for process ID"},
181	michael	2916	{"foreground", &server_state.foreground,
182	adx	30	YESNO, "Run in foreground (don't detach)"},
183	michael	2916	{"version", &printVersion,
184	adx	30	YESNO, "Print version and exit"},
185			{"help", NULL, USAGE, "Print this text"},
186			{NULL, NULL, STRING, NULL},
187			};
188
189			void
190			set_time(void)
191			{
192	michael	2978	struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
193	adx	30
194			if (gettimeofday(&newtime, NULL) == -1)
195			{
196	michael	1247	ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
197	adx	30	strerror(errno));
198	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
199	adx	30	"Clock Failure (%s), TS can be corrupted",
200			strerror(errno));
201	michael	3167	server_die("Clock Failure", 1);
202	adx	30	}
203
204			if (newtime.tv_sec < CurrentTime)
205			{
206	michael	2980	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
207			(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
208			sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
209			"System clock is running backwards - (%lu < %lu)",
210			(unsigned long)newtime.tv_sec,
211			(unsigned long)CurrentTime);
212	adx	30	set_back_events(CurrentTime - newtime.tv_sec);
213			}
214
215			SystemTime.tv_sec = newtime.tv_sec;
216			SystemTime.tv_usec = newtime.tv_usec;
217			}
218
219			static void
220			io_loop(void)
221			{
222	michael	3215	while (1)
223	adx	30	{
224			if (listing_client_list.head)
225			{
226			dlink_node ptr = NULL, ptr_next = NULL;
227			DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
228	michael	3288	safe_list_channels(ptr->data, 0);
229	adx	30	}
230
231	michael	4094	/* Run pending events */
232			event_run();
233	adx	30
234			comm_select();
235			exit_aborted_clients();
236			free_exited_clients();
237
238			/* Check to see whether we have to rehash the configuration .. */
239			if (dorehash)
240			{
241			rehash(1);
242			dorehash = 0;
243			}
244	michael	3215
245	adx	30	if (doremotd)
246			{
247	michael	2150	motd_recache();
248	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
249	michael	3065	"Got signal SIGUSR1, reloading motd file(s)");
250	adx	30	doremotd = 0;
251			}
252			}
253			}
254
255			/* initalialize_global_set_options()
256			*
257			* inputs - none
258			* output - none
259	michael	2916	* side effects - This sets all global set options needed
260	adx	30	*/
261			static void
262			initialize_global_set_options(void)
263			{
264			GlobalSetOptions.autoconn = 1;
265			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
266			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
267
268	michael	4340	if (ConfigGeneral.default_floodcount)
269			GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
270	adx	30	else
271			GlobalSetOptions.floodcount = 10;
272
273			/* XXX I have no idea what to try here - Dianora */
274			GlobalSetOptions.joinfloodcount = 16;
275			GlobalSetOptions.joinfloodtime = 8;
276
277			split_servers = ConfigChannel.default_split_server_count;
278			split_users = ConfigChannel.default_split_user_count;
279
280			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
281			ConfigChannel.no_join_on_split))
282			{
283			splitmode = 1;
284			splitchecking = 1;
285			}
286
287			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
288			}
289
290			/* initialize_server_capabs()
291			*
292			* inputs - none
293			* output - none
294			*/
295			static void
296			initialize_server_capabs(void)
297			{
298			add_capability("QS", CAP_QS, 1);
299			add_capability("EOB", CAP_EOB, 1);
300	michael	1117	add_capability("TS6", CAP_TS6, 0);
301	adx	30	add_capability("CLUSTER", CAP_CLUSTER, 1);
302	michael	1196	add_capability("SVS", CAP_SVS, 1);
303	michael	3267	add_capability("CHW", CAP_CHW, 1);
304	adx	30	add_capability("HOPS", CAP_HOPS, 1);
305			}
306
307			/* write_pidfile()
308			*
309			* inputs - filename+path of pid file
310			* output - NONE
311			* side effects - write the pid of the ircd to filename
312			*/
313			static void
314			write_pidfile(const char *filename)
315			{
316	michael	1325	FILE *fb;
317	adx	30
318	michael	1325	if ((fb = fopen(filename, "w")))
319	adx	30	{
320	michael	2691	char buff[IRCD_BUFSIZE];
321	adx	30	unsigned int pid = (unsigned int)getpid();
322
323	michael	1325	snprintf(buff, sizeof(buff), "%u\n", pid);
324
325			if ((fputs(buff, fb) == -1))
326	michael	1247	ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
327	adx	30	pid, filename, strerror(errno));
328
329	michael	1325	fclose(fb);
330	adx	30	}
331			else
332			{
333	michael	1247	ilog(LOG_TYPE_IRCD, "Error opening pid file %s", filename);
334	adx	30	}
335			}
336
337			/* check_pidfile()
338			*
339			* inputs - filename+path of pid file
340			* output - none
341			* side effects - reads pid from pidfile and checks if ircd is in process
342			* list. if it is, gracefully exits
343			* -kre
344			*/
345			static void
346			check_pidfile(const char *filename)
347			{
348	michael	1325	FILE *fb;
349	michael	2691	char buff[IRCD_BUFSIZE];
350	adx	30	pid_t pidfromfile;
351
352			/* Don't do logging here, since we don't have log() initialised */
353	michael	1325	if ((fb = fopen(filename, "r")))
354	adx	30	{
355	michael	1325	if (fgets(buff, 20, fb) == NULL)
356	adx	30	{
357			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
358			* strerror(errno));
359			*/
360			}
361			else
362			{
363			pidfromfile = atoi(buff);
364
365			if (!kill(pidfromfile, 0))
366			{
367			/* log(L_ERROR, "Server is already running"); */
368			printf("ircd: daemon is already running\n");
369			exit(-1);
370			}
371			}
372
373	michael	1325	fclose(fb);
374	adx	30	}
375			else if (errno != ENOENT)
376			{
377			/* log(L_ERROR, "Error opening pid file %s", filename); */
378			}
379			}
380
381			/* setup_corefile()
382			*
383			* inputs - nothing
384			* output - nothing
385			* side effects - setups corefile to system limits.
386			* -kre
387			*/
388			static void
389			setup_corefile(void)
390			{
391			#ifdef HAVE_SYS_RESOURCE_H
392			struct rlimit rlim; /* resource limits */
393
394			/* Set corefilesize to maximum */
395			if (!getrlimit(RLIMIT_CORE, &rlim))
396			{
397			rlim.rlim_cur = rlim.rlim_max;
398			setrlimit(RLIMIT_CORE, &rlim);
399			}
400			#endif
401			}
402
403	michael	2228	#ifdef HAVE_LIBCRYPTO
404			static int
405			always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
406			{
407			return 1;
408			}
409			#endif
410
411	adx	30	/* init_ssl()
412			*
413			* inputs - nothing
414			* output - nothing
415			* side effects - setups SSL context.
416			*/
417			static void
418	michael	1798	ssl_init(void)
419	adx	30	{
420			#ifdef HAVE_LIBCRYPTO
421	michael	2914	const unsigned char session_id[] = "ircd-hybrid";
422
423	adx	30	SSL_load_error_strings();
424			SSLeay_add_ssl_algorithms();
425
426	michael	4340	if ((ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
427	adx	30	{
428	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
429	adx	30
430	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
431	michael	1303	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
432	adx	30	}
433
434	michael	4340	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3);
435			SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE);
436			SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
437	michael	2228	always_accept_verify_cb);
438	michael	4340	SSL_CTX_set_session_id_context(ConfigServerInfo.server_ctx, session_id, sizeof(session_id) - 1);
439	adx	30
440	michael	4070	#if OPENSSL_VERSION_NUMBER >= 0x1000005FL && !defined(OPENSSL_NO_ECDH)
441			{
442			EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
443
444			if (key)
445			{
446	michael	4340	SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
447	michael	4070	EC_KEY_free(key);
448			}
449			}
450
451	michael	4340	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
452	michael	4070	#endif
453
454	michael	4340	if ((ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
455	michael	1303	{
456	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
457	michael	1303
458	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
459	michael	1303	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
460			}
461
462	michael	4340	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3);
463			SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
464			SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
465	michael	2228	always_accept_verify_cb);
466	adx	30	#endif /* HAVE_LIBCRYPTO */
467			}
468
469			int
470			main(int argc, char *argv[])
471			{
472	michael	2253	/* Check to see if the user is running us as root, which is a nono */
473	adx	30	if (geteuid() == 0)
474			{
475	michael	3525	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
476	michael	982	return -1;
477	adx	30	}
478
479			/* Setup corefile size immediately after boot -kre */
480			setup_corefile();
481
482			/* save server boot time right away, so getrusage works correctly */
483			set_time();
484
485	michael	982	/* It ain't random, but it ought to be a little harder to guess */
486			init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
487
488	adx	30	me.localClient = &meLocalUser;
489	michael	2253	dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
490	adx	30	of Client list */
491	michael	4340	ConfigLog.use_logging = 1;
492			ConfigGeneral.dpath = DPATH;
493			ConfigGeneral.spath = SPATH;
494			ConfigGeneral.mpath = MPATH;
495			ConfigGeneral.configfile = CPATH; /* Server configuration file */
496			ConfigGeneral.klinefile = KPATH; /* Server kline file */
497			ConfigGeneral.glinefile = GPATH; /* Server gline file */
498			ConfigGeneral.xlinefile = XPATH; /* Server xline file */
499			ConfigGeneral.dlinefile = DLPATH; /* dline file */
500			ConfigGeneral.resvfile = RESVPATH; /* resv file */
501	michael	1702
502	adx	30	myargv = argv;
503			umask(077); /* better safe than sorry --SRB */
504
505			parseargs(&argc, &argv, myopts);
506
507			if (printVersion)
508			{
509	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
510	adx	30	exit(EXIT_SUCCESS);
511			}
512
513	michael	4340	if (chdir(ConfigGeneral.dpath))
514	adx	30	{
515			perror("chdir");
516			exit(EXIT_FAILURE);
517			}
518
519	michael	1798	ssl_init();
520	adx	30
521			if (!server_state.foreground)
522			{
523			make_daemon();
524			close_standard_fds(); /* this needs to be before init_netio()! */
525			}
526			else
527			print_startup(getpid());
528
529			setup_signals();
530
531			/* We need this to initialise the fd array before anything else */
532			fdlist_init();
533	michael	1831	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
534	adx	30	check_can_use_v6();
535	michael	2632	init_netio(); /* This needs to be setup early ! -- adrian */
536	michael	2253
537	adx	30	/* Check if there is pidfile and daemon already running */
538			check_pidfile(pidFileName);
539
540	michael	1654	mp_pool_init();
541	adx	30	init_dlink_nodes();
542	michael	2159	init_isupport();
543	adx	30	dbuf_init();
544	michael	1798	hash_init();
545	michael	4319	ipcache_init();
546	adx	30	init_host_hash(); /* Host-hashtable. */
547	michael	1798	client_init();
548	michael	1632	class_init();
549	michael	1358	whowas_init();
550	michael	876	watch_init();
551	michael	1798	auth_init(); /* Initialise the auth code */
552	michael	998	init_resolver(); /* Needs to be setup before the io loop */
553	michael	1404	modules_init();
554	adx	30	read_conf_files(1); /* cold start init conf files */
555			init_uid();
556			initialize_server_capabs(); /* Set up default_server_capabs */
557			initialize_global_set_options();
558	michael	1798	channel_init();
559	michael	2216	read_links_file();
560	michael	2150	motd_init();
561	michael	1858	#ifdef HAVE_LIBGEOIP
562			geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
563			#endif
564	adx	30
565	michael	4340	if (EmptyString(ConfigServerInfo.sid))
566	adx	30	{
567	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
568	adx	30	exit(EXIT_FAILURE);
569			}
570	michael	885
571	michael	4340	strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
572	michael	1115
573	michael	4340	if (EmptyString(ConfigServerInfo.name))
574	michael	1115	{
575	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
576	michael	1115	exit(EXIT_FAILURE);
577			}
578
579	michael	4340	strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
580	adx	30
581			/* serverinfo{} description must exist. If not, error out.*/
582	michael	4340	if (EmptyString(ConfigServerInfo.description))
583	adx	30	{
584	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
585	adx	30	exit(EXIT_FAILURE);
586			}
587	michael	885
588	michael	4340	strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
589	adx	30
590	michael	1241	me.from = &me;
591			me.servptr = &me;
592			me.localClient->lasttime = CurrentTime;
593			me.localClient->since = CurrentTime;
594			me.localClient->firsttime = CurrentTime;
595	adx	30
596			SetMe(&me);
597			make_server(&me);
598
599	michael	1115	hash_add_id(&me);
600	adx	30	hash_add_client(&me);
601	michael	2916
602	michael	4209	dlinkAdd(&me, make_dlink_node(), &global_server_list);
603	adx	30
604	michael	1622	load_kline_database();
605			load_dline_database();
606			load_gline_database();
607			load_xline_database();
608			load_resv_database();
609
610	adx	30	if (chdir(MODPATH))
611			{
612	michael	1247	ilog(LOG_TYPE_IRCD, "Could not load core modules. Terminating!");
613	adx	30	exit(EXIT_FAILURE);
614			}
615
616			load_all_modules(1);
617			load_conf_modules();
618			load_core_modules(1);
619	michael	1115
620	adx	30	/* Go back to DPATH after checking to see if we can chdir to MODPATH */
621	michael	4340	if (chdir(ConfigGeneral.dpath))
622	michael	1115	{
623			perror("chdir");
624			exit(EXIT_FAILURE);
625			}
626	michael	1121
627	adx	30	/*
628			* assemble_umode_buffer() has to be called after
629			* reading conf/loading modules.
630			*/
631			assemble_umode_buffer();
632
633			write_pidfile(pidFileName);
634
635	michael	1247	ilog(LOG_TYPE_IRCD, "Server Ready");
636	adx	30
637	michael	4094	event_addish(&event_cleanup_glines, NULL);
638			event_addish(&event_cleanup_tklines, NULL);
639	adx	30
640			/* We want try_connections to be called as soon as possible now! -- adrian */
641			/* No, 'cause after a restart it would cause all sorts of nick collides */
642	michael	4094	event_addish(&event_try_connections, NULL);
643	adx	30
644			/* Setup the timeout check. I'll shift it later :) -- adrian */
645	michael	4399	event_add(&event_comm_checktimeouts, NULL);
646	adx	30
647	michael	4094	event_addish(&event_save_all_databases, NULL);
648	michael	1625
649	adx	30	if (ConfigServerHide.links_delay > 0)
650	michael	4094	{
651			event_write_links_file.when = ConfigServerHide.links_delay;
652			event_addish(&event_write_links_file, NULL);
653			}
654	adx	30	else
655			ConfigServerHide.links_disabled = 1;
656
657			if (splitmode)
658	michael	4133	event_addish(&splitmode_event, NULL);
659	adx	30
660			io_loop();
661	michael	885	return 0;
662	adx	30	}