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 "supported.h"
#include "watch.h"
#include "conf_db.h"
#include "conf_class.h"


#ifdef HAVE_LIBGEOIP
GeoIP *geoip_ctx;
#endif

/* /quote set variables */
struct SetOptions GlobalSetOptions;
struct Counter Count;
struct ServerState_t server_state;
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,
};

struct event event_check_splitmode =
{
  .name = "check_splitmode",
  .handler = check_splitmode,
  .when = 60
};

/*
 * 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", ConfigFileEntry.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", &ConfigFileEntry.configfile,
   STRING, "File to use for ircd.conf"},
  {"glinefile",  &ConfigFileEntry.glinefile,
   STRING, "File to use for gline database"},
  {"klinefile",  &ConfigFileEntry.klinefile,
   STRING, "File to use for kline database"},
  {"dlinefile",  &ConfigFileEntry.dlinefile,
   STRING, "File to use for dline database"},
  {"xlinefile",  &ConfigFileEntry.xlinefile,
   STRING, "File to use for xline database"},
  {"resvfile",  &ConfigFileEntry.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)
{
  memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));

  GlobalSetOptions.autoconn  = 1;
  GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
  GlobalSetOptions.spam_num  = MAX_JOIN_LEAVE_COUNT;

  if (ConfigFileEntry.default_floodcount)
    GlobalSetOptions.floodcount = ConfigFileEntry.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;
  /* End of global set options */
}

/* 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 ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
  {
    const char *s;

    fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n",
            s = ERR_lib_error_string(ERR_get_error()));
    ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
  }

  SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
  SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG);
  SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
                     always_accept_verify_cb);
  SSL_CTX_set_session_id_context(ServerInfo.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(ServerInfo.server_ctx, key);
      EC_KEY_free(key);
    }
  }

  SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
#endif

  if ((ServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
  {
    const char *s;

    fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n",
            s = ERR_lib_error_string(ERR_get_error()));
    ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
  }

  SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
  SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_TLS_ROLLBACK_BUG);
  SSL_CTX_set_verify(ServerInfo.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 */
  ConfigLoggingEntry.use_logging = 1;
  ConfigFileEntry.dpath      = DPATH;
  ConfigFileEntry.spath      = SPATH;
  ConfigFileEntry.mpath      = MPATH;
  ConfigFileEntry.configfile = CPATH;    /* Server configuration file */
  ConfigFileEntry.klinefile  = KPATH;    /* Server kline file         */
  ConfigFileEntry.glinefile  = GPATH;    /* Server gline file         */
  ConfigFileEntry.xlinefile  = XPATH;    /* Server xline file         */
  ConfigFileEntry.dlinefile  = DLPATH;   /* dline file                */
  ConfigFileEntry.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(ConfigFileEntry.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();
  init_ip_hash_table();      /* client host ip hash table */
  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(ServerInfo.sid))
  {
    ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
    exit(EXIT_FAILURE);
  }

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

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

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

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

  strlcpy(me.info, ServerInfo.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);

  /* add ourselves to global_serv_list */
  dlinkAdd(&me, make_dlink_node(), &global_serv_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(ConfigFileEntry.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_addish(&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(&event_check_splitmode, NULL);

  io_loop();
  return 0;
}
Revision:	4094
Committed:	Sun Jun 29 11:48:50 2014 UTC (11 years, 2 months ago) by michael
Content type:	text/x-csrc
File size:	17409 byte(s)
Log Message:	- Merged Adam's event system rewrite
#	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			#include "supported.h"
57	michael	876	#include "watch.h"
58	michael	1622	#include "conf_db.h"
59	michael	1632	#include "conf_class.h"
60	adx	30
61	michael	1858
62			#ifdef HAVE_LIBGEOIP
63			GeoIP *geoip_ctx;
64			#endif
65	michael	2872
66	adx	30	/* /quote set variables */
67			struct SetOptions GlobalSetOptions;
68	michael	2872	struct Counter Count;
69			struct ServerState_t server_state;
70	michael	896	struct ServerStatistics ServerStats;
71	adx	30	struct timeval SystemTime;
72			struct Client me; /* That's me */
73			struct LocalUser meLocalUser; /* That's also part of me */
74
75			const char *logFileName = LPATH;
76			const char *pidFileName = PPATH;
77
78			char **myargv;
79
80			int dorehash = 0;
81			int doremotd = 0;
82
83			/* Set to zero because it should be initialized later using
84			* initialize_server_capabs
85			*/
86	michael	3907	unsigned int default_server_capabs;
87	michael	1013	unsigned int splitmode;
88			unsigned int splitchecking;
89			unsigned int split_users;
90	adx	30	unsigned int split_servers;
91
92	michael	4094	static struct event event_cleanup_glines =
93			{
94			.name = "cleanup_glines",
95			.handler = cleanup_glines,
96			.when = CLEANUP_GLINES_TIME
97			};
98
99			static struct event event_cleanup_tklines =
100			{
101			.name = "cleanup_tklines",
102			.handler = cleanup_tklines,
103			.when = CLEANUP_TKLINES_TIME
104			};
105
106			static struct event event_try_connections =
107			{
108			.name = "try_connections",
109			.handler = try_connections,
110			.when = STARTUP_CONNECTIONS_TIME
111			};
112
113			static struct event event_comm_checktimeouts =
114			{
115			.name = "comm_checktimeouts",
116			.handler = comm_checktimeouts,
117			.when = 1
118			};
119
120			static struct event event_save_all_databases =
121			{
122			.name = "save_all_databases",
123			.handler = save_all_databases,
124			.when = DATABASE_UPDATE_TIMEOUT
125			};
126
127			struct event event_write_links_file =
128			{
129			.name = "write_links_file",
130			.handler = write_links_file,
131			};
132
133			struct event event_check_splitmode =
134			{
135			.name = "check_splitmode",
136			.handler = check_splitmode,
137			.when = 60
138			};
139
140	adx	30	/*
141			* print_startup - print startup information
142			*/
143			static void
144			print_startup(int pid)
145			{
146	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
147	adx	30	printf("ircd: pid %d\n", pid);
148			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
149			: "foreground", ConfigFileEntry.dpath);
150			}
151
152			static void
153			make_daemon(void)
154			{
155			int pid;
156
157			if ((pid = fork()) < 0)
158			{
159			perror("fork");
160			exit(EXIT_FAILURE);
161			}
162			else if (pid > 0)
163			{
164			print_startup(pid);
165			exit(EXIT_SUCCESS);
166			}
167
168			setsid();
169			}
170
171			static int printVersion = 0;
172
173	michael	3215	static struct lgetopt myopts[] =
174			{
175	michael	2916	{"configfile", &ConfigFileEntry.configfile,
176	adx	30	STRING, "File to use for ircd.conf"},
177	michael	1718	{"glinefile", &ConfigFileEntry.glinefile,
178			STRING, "File to use for gline database"},
179	michael	2916	{"klinefile", &ConfigFileEntry.klinefile,
180	michael	1718	STRING, "File to use for kline database"},
181			{"dlinefile", &ConfigFileEntry.dlinefile,
182			STRING, "File to use for dline database"},
183	michael	2916	{"xlinefile", &ConfigFileEntry.xlinefile,
184	michael	1718	STRING, "File to use for xline database"},
185			{"resvfile", &ConfigFileEntry.resvfile,
186			STRING, "File to use for resv database"},
187	michael	2916	{"logfile", &logFileName,
188	adx	30	STRING, "File to use for ircd.log"},
189			{"pidfile", &pidFileName,
190			STRING, "File to use for process ID"},
191	michael	2916	{"foreground", &server_state.foreground,
192	adx	30	YESNO, "Run in foreground (don't detach)"},
193	michael	2916	{"version", &printVersion,
194	adx	30	YESNO, "Print version and exit"},
195			{"help", NULL, USAGE, "Print this text"},
196			{NULL, NULL, STRING, NULL},
197			};
198
199			void
200			set_time(void)
201			{
202	michael	2978	struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
203	adx	30
204			if (gettimeofday(&newtime, NULL) == -1)
205			{
206	michael	1247	ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
207	adx	30	strerror(errno));
208	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
209	adx	30	"Clock Failure (%s), TS can be corrupted",
210			strerror(errno));
211	michael	3167	server_die("Clock Failure", 1);
212	adx	30	}
213
214			if (newtime.tv_sec < CurrentTime)
215			{
216	michael	2980	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
217			(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
218			sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
219			"System clock is running backwards - (%lu < %lu)",
220			(unsigned long)newtime.tv_sec,
221			(unsigned long)CurrentTime);
222	adx	30	set_back_events(CurrentTime - newtime.tv_sec);
223			}
224
225			SystemTime.tv_sec = newtime.tv_sec;
226			SystemTime.tv_usec = newtime.tv_usec;
227			}
228
229			static void
230			io_loop(void)
231			{
232	michael	3215	while (1)
233	adx	30	{
234			if (listing_client_list.head)
235			{
236			dlink_node ptr = NULL, ptr_next = NULL;
237			DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
238	michael	3288	safe_list_channels(ptr->data, 0);
239	adx	30	}
240
241	michael	4094	/* Run pending events */
242			event_run();
243	adx	30
244			comm_select();
245			exit_aborted_clients();
246			free_exited_clients();
247
248			/* Check to see whether we have to rehash the configuration .. */
249			if (dorehash)
250			{
251			rehash(1);
252			dorehash = 0;
253			}
254	michael	3215
255	adx	30	if (doremotd)
256			{
257	michael	2150	motd_recache();
258	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
259	michael	3065	"Got signal SIGUSR1, reloading motd file(s)");
260	adx	30	doremotd = 0;
261			}
262			}
263			}
264
265			/* initalialize_global_set_options()
266			*
267			* inputs - none
268			* output - none
269	michael	2916	* side effects - This sets all global set options needed
270	adx	30	*/
271			static void
272			initialize_global_set_options(void)
273			{
274			memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
275
276			GlobalSetOptions.autoconn = 1;
277			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
278			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
279
280			if (ConfigFileEntry.default_floodcount)
281			GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
282			else
283			GlobalSetOptions.floodcount = 10;
284
285			/* XXX I have no idea what to try here - Dianora */
286			GlobalSetOptions.joinfloodcount = 16;
287			GlobalSetOptions.joinfloodtime = 8;
288
289			split_servers = ConfigChannel.default_split_server_count;
290			split_users = ConfigChannel.default_split_user_count;
291
292			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
293			ConfigChannel.no_join_on_split))
294			{
295			splitmode = 1;
296			splitchecking = 1;
297			}
298
299			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
300			/* End of global set options */
301			}
302
303			/* initialize_server_capabs()
304			*
305			* inputs - none
306			* output - none
307			*/
308			static void
309			initialize_server_capabs(void)
310			{
311			add_capability("QS", CAP_QS, 1);
312			add_capability("EOB", CAP_EOB, 1);
313	michael	1117	add_capability("TS6", CAP_TS6, 0);
314	adx	30	add_capability("CLUSTER", CAP_CLUSTER, 1);
315	michael	1196	add_capability("SVS", CAP_SVS, 1);
316	michael	3267	add_capability("CHW", CAP_CHW, 1);
317	adx	30	add_capability("HOPS", CAP_HOPS, 1);
318			}
319
320			/* write_pidfile()
321			*
322			* inputs - filename+path of pid file
323			* output - NONE
324			* side effects - write the pid of the ircd to filename
325			*/
326			static void
327			write_pidfile(const char *filename)
328			{
329	michael	1325	FILE *fb;
330	adx	30
331	michael	1325	if ((fb = fopen(filename, "w")))
332	adx	30	{
333	michael	2691	char buff[IRCD_BUFSIZE];
334	adx	30	unsigned int pid = (unsigned int)getpid();
335
336	michael	1325	snprintf(buff, sizeof(buff), "%u\n", pid);
337
338			if ((fputs(buff, fb) == -1))
339	michael	1247	ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
340	adx	30	pid, filename, strerror(errno));
341
342	michael	1325	fclose(fb);
343	adx	30	}
344			else
345			{
346	michael	1247	ilog(LOG_TYPE_IRCD, "Error opening pid file %s", filename);
347	adx	30	}
348			}
349
350			/* check_pidfile()
351			*
352			* inputs - filename+path of pid file
353			* output - none
354			* side effects - reads pid from pidfile and checks if ircd is in process
355			* list. if it is, gracefully exits
356			* -kre
357			*/
358			static void
359			check_pidfile(const char *filename)
360			{
361	michael	1325	FILE *fb;
362	michael	2691	char buff[IRCD_BUFSIZE];
363	adx	30	pid_t pidfromfile;
364
365			/* Don't do logging here, since we don't have log() initialised */
366	michael	1325	if ((fb = fopen(filename, "r")))
367	adx	30	{
368	michael	1325	if (fgets(buff, 20, fb) == NULL)
369	adx	30	{
370			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
371			* strerror(errno));
372			*/
373			}
374			else
375			{
376			pidfromfile = atoi(buff);
377
378			if (!kill(pidfromfile, 0))
379			{
380			/* log(L_ERROR, "Server is already running"); */
381			printf("ircd: daemon is already running\n");
382			exit(-1);
383			}
384			}
385
386	michael	1325	fclose(fb);
387	adx	30	}
388			else if (errno != ENOENT)
389			{
390			/* log(L_ERROR, "Error opening pid file %s", filename); */
391			}
392			}
393
394			/* setup_corefile()
395			*
396			* inputs - nothing
397			* output - nothing
398			* side effects - setups corefile to system limits.
399			* -kre
400			*/
401			static void
402			setup_corefile(void)
403			{
404			#ifdef HAVE_SYS_RESOURCE_H
405			struct rlimit rlim; /* resource limits */
406
407			/* Set corefilesize to maximum */
408			if (!getrlimit(RLIMIT_CORE, &rlim))
409			{
410			rlim.rlim_cur = rlim.rlim_max;
411			setrlimit(RLIMIT_CORE, &rlim);
412			}
413			#endif
414			}
415
416	michael	2228	#ifdef HAVE_LIBCRYPTO
417			static int
418			always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
419			{
420			return 1;
421			}
422			#endif
423
424	adx	30	/* init_ssl()
425			*
426			* inputs - nothing
427			* output - nothing
428			* side effects - setups SSL context.
429			*/
430			static void
431	michael	1798	ssl_init(void)
432	adx	30	{
433			#ifdef HAVE_LIBCRYPTO
434	michael	2914	const unsigned char session_id[] = "ircd-hybrid";
435
436	adx	30	SSL_load_error_strings();
437			SSLeay_add_ssl_algorithms();
438
439	michael	967	if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
440	adx	30	{
441			const char *s;
442
443	michael	1303	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n",
444	adx	30	s = ERR_lib_error_string(ERR_get_error()));
445	michael	1303	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
446	adx	30	}
447
448	michael	1316	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TLSv1);
449	michael	4073	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG);
450	michael	2228	SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
451			always_accept_verify_cb);
452	michael	2914	SSL_CTX_set_session_id_context(ServerInfo.server_ctx, session_id, sizeof(session_id) - 1);
453	adx	30
454	michael	4070	#if OPENSSL_VERSION_NUMBER >= 0x1000005FL && !defined(OPENSSL_NO_ECDH)
455			{
456			EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
457
458			if (key)
459			{
460			SSL_CTX_set_tmp_ecdh(ServerInfo.server_ctx, key);
461			EC_KEY_free(key);
462			}
463			}
464
465			SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
466			#endif
467
468	michael	1303	if ((ServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
469			{
470			const char *s;
471
472			fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n",
473			s = ERR_lib_error_string(ERR_get_error()));
474			ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
475			}
476
477	michael	1316	SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TLSv1);
478	michael	4073	SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_TLS_ROLLBACK_BUG);
479	michael	2253	SSL_CTX_set_verify(ServerInfo.client_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
480	michael	2228	always_accept_verify_cb);
481	adx	30	#endif /* HAVE_LIBCRYPTO */
482			}
483
484			int
485			main(int argc, char *argv[])
486			{
487	michael	2253	/* Check to see if the user is running us as root, which is a nono */
488	adx	30	if (geteuid() == 0)
489			{
490	michael	3525	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
491	michael	982	return -1;
492	adx	30	}
493
494			/* Setup corefile size immediately after boot -kre */
495			setup_corefile();
496
497			/* save server boot time right away, so getrusage works correctly */
498			set_time();
499
500	michael	982	/* It ain't random, but it ought to be a little harder to guess */
501			init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
502
503	adx	30	me.localClient = &meLocalUser;
504	michael	2253	dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
505	adx	30	of Client list */
506	michael	4080	ConfigLoggingEntry.use_logging = 1;
507	adx	30	ConfigFileEntry.dpath = DPATH;
508	michael	3239	ConfigFileEntry.spath = SPATH;
509			ConfigFileEntry.mpath = MPATH;
510	michael	1702	ConfigFileEntry.configfile = CPATH; /* Server configuration file */
511			ConfigFileEntry.klinefile = KPATH; /* Server kline file */
512	michael	1718	ConfigFileEntry.glinefile = GPATH; /* Server gline file */
513	michael	1702	ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
514			ConfigFileEntry.dlinefile = DLPATH; /* dline file */
515			ConfigFileEntry.resvfile = RESVPATH; /* resv file */
516
517	adx	30	myargv = argv;
518			umask(077); /* better safe than sorry --SRB */
519
520			parseargs(&argc, &argv, myopts);
521
522			if (printVersion)
523			{
524	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
525	adx	30	exit(EXIT_SUCCESS);
526			}
527
528			if (chdir(ConfigFileEntry.dpath))
529			{
530			perror("chdir");
531			exit(EXIT_FAILURE);
532			}
533
534	michael	1798	ssl_init();
535	adx	30
536			if (!server_state.foreground)
537			{
538			make_daemon();
539			close_standard_fds(); /* this needs to be before init_netio()! */
540			}
541			else
542			print_startup(getpid());
543
544			setup_signals();
545
546			/* We need this to initialise the fd array before anything else */
547			fdlist_init();
548	michael	1831	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
549	adx	30	check_can_use_v6();
550	michael	2632	init_netio(); /* This needs to be setup early ! -- adrian */
551	michael	2253
552	adx	30	/* Check if there is pidfile and daemon already running */
553			check_pidfile(pidFileName);
554
555	michael	1654	mp_pool_init();
556	adx	30	init_dlink_nodes();
557	michael	2159	init_isupport();
558	adx	30	dbuf_init();
559	michael	1798	hash_init();
560	adx	30	init_ip_hash_table(); /* client host ip hash table */
561			init_host_hash(); /* Host-hashtable. */
562	michael	1798	client_init();
563	michael	1632	class_init();
564	michael	1358	whowas_init();
565	michael	876	watch_init();
566	michael	1798	auth_init(); /* Initialise the auth code */
567	michael	998	init_resolver(); /* Needs to be setup before the io loop */
568	michael	1404	modules_init();
569	adx	30	read_conf_files(1); /* cold start init conf files */
570			init_uid();
571			initialize_server_capabs(); /* Set up default_server_capabs */
572			initialize_global_set_options();
573	michael	1798	channel_init();
574	michael	2216	read_links_file();
575	michael	2150	motd_init();
576	michael	1858	#ifdef HAVE_LIBGEOIP
577			geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
578			#endif
579	adx	30
580	michael	1115	if (EmptyString(ServerInfo.sid))
581	adx	30	{
582	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
583	adx	30	exit(EXIT_FAILURE);
584			}
585	michael	885
586	michael	1115	strlcpy(me.id, ServerInfo.sid, sizeof(me.id));
587
588			if (EmptyString(ServerInfo.name))
589			{
590	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
591	michael	1115	exit(EXIT_FAILURE);
592			}
593
594	adx	30	strlcpy(me.name, ServerInfo.name, sizeof(me.name));
595
596			/* serverinfo{} description must exist. If not, error out.*/
597	michael	1115	if (EmptyString(ServerInfo.description))
598	adx	30	{
599	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
600	adx	30	exit(EXIT_FAILURE);
601			}
602	michael	885
603	adx	30	strlcpy(me.info, ServerInfo.description, sizeof(me.info));
604
605	michael	1241	me.from = &me;
606			me.servptr = &me;
607			me.localClient->lasttime = CurrentTime;
608			me.localClient->since = CurrentTime;
609			me.localClient->firsttime = CurrentTime;
610	adx	30
611			SetMe(&me);
612			make_server(&me);
613
614	michael	1115	hash_add_id(&me);
615	adx	30	hash_add_client(&me);
616	michael	2916
617	adx	30	/* add ourselves to global_serv_list */
618			dlinkAdd(&me, make_dlink_node(), &global_serv_list);
619
620	michael	1622	load_kline_database();
621			load_dline_database();
622			load_gline_database();
623			load_xline_database();
624			load_resv_database();
625
626	adx	30	if (chdir(MODPATH))
627			{
628	michael	1247	ilog(LOG_TYPE_IRCD, "Could not load core modules. Terminating!");
629	adx	30	exit(EXIT_FAILURE);
630			}
631
632			load_all_modules(1);
633			load_conf_modules();
634			load_core_modules(1);
635	michael	1115
636	adx	30	/* Go back to DPATH after checking to see if we can chdir to MODPATH */
637	michael	1115	if (chdir(ConfigFileEntry.dpath))
638			{
639			perror("chdir");
640			exit(EXIT_FAILURE);
641			}
642	michael	1121
643	adx	30	/*
644			* assemble_umode_buffer() has to be called after
645			* reading conf/loading modules.
646			*/
647			assemble_umode_buffer();
648
649			write_pidfile(pidFileName);
650
651	michael	1247	ilog(LOG_TYPE_IRCD, "Server Ready");
652	adx	30
653	michael	4094	event_addish(&event_cleanup_glines, NULL);
654			event_addish(&event_cleanup_tklines, NULL);
655	adx	30
656			/* We want try_connections to be called as soon as possible now! -- adrian */
657			/* No, 'cause after a restart it would cause all sorts of nick collides */
658	michael	4094	event_addish(&event_try_connections, NULL);
659	adx	30
660			/* Setup the timeout check. I'll shift it later :) -- adrian */
661	michael	4094	event_addish(&event_comm_checktimeouts, NULL);
662	adx	30
663	michael	4094	event_addish(&event_save_all_databases, NULL);
664	michael	1625
665	adx	30	if (ConfigServerHide.links_delay > 0)
666	michael	4094	{
667			event_write_links_file.when = ConfigServerHide.links_delay;
668			event_addish(&event_write_links_file, NULL);
669			}
670	adx	30	else
671			ConfigServerHide.links_disabled = 1;
672
673			if (splitmode)
674	michael	4094	event_addish(&event_check_splitmode, NULL);
675	adx	30
676			io_loop();
677	michael	885	return 0;
678	adx	30	}