trunk/src/ircd.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2015 ircd-hybrid development team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 *  USA
 */

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

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


#ifdef HAVE_LIBGEOIP
GeoIP *geoip_ctx;
#endif

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

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

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

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

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

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

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

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

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


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

static void
make_daemon(void)
{
  int pid;

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

  setsid();
}

static int printVersion = 0;

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

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

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

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

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

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

    /* Run pending events */
    event_run();

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

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

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

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

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

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

  GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
#endif

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

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

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

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

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

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

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

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

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

  myargv = argv;
  umask(077);                /* 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);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  write_pidfile(pidFileName);

  ilog(LOG_TYPE_IRCD, "Server Ready");

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

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

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

  event_addish(&event_save_all_databases, NULL);

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

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

  io_loop();
  return 0;
}
Revision:	5602
Committed:	Mon Feb 23 21:04:46 2015 UTC (10 years, 6 months ago) by michael
Content type:	text/x-csrc
File size:	16756 byte(s)
Log Message:	- Fixed core in conjunction with OSX 10.10/possibly other system when parsing pseudo{} blocks as reported by Daniel Oaks - Reverted -r4080, -r4609 and 4106 as they only cause undefined behavior on some systems
#	User	Rev	Content
1	adx	30	/*
2	michael	2916	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	5347	* Copyright (c) 1997-2015 ircd-hybrid development team
5	adx	30	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18	michael	4565	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	adx	30	* USA
20			*/
21
22	michael	2916	/*! \file ircd.c
23			* \brief Starts up and runs the ircd.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	michael	3347	#include "user.h"
29	michael	1011	#include "list.h"
30	adx	30	#include "ircd.h"
31			#include "channel.h"
32			#include "client.h"
33			#include "event.h"
34			#include "fdlist.h"
35			#include "hash.h"
36			#include "irc_string.h"
37			#include "ircd_signal.h"
38	michael	3321	#include "gline.h"
39	adx	30	#include "motd.h"
40	michael	1632	#include "conf.h"
41	adx	30	#include "hostmask.h"
42			#include "parse.h"
43	michael	3322	#include "res.h"
44	adx	30	#include "restart.h"
45	michael	982	#include "rng_mt.h"
46	michael	3324	#include "auth.h"
47	adx	30	#include "s_bsd.h"
48	michael	1309	#include "log.h"
49	michael	3347	#include "server.h" /* try_connections */
50	adx	30	#include "send.h"
51			#include "whowas.h"
52			#include "modules.h"
53			#include "memory.h"
54	michael	1654	#include "mempool.h"
55	adx	30	#include "ircd_getopt.h"
56	michael	876	#include "watch.h"
57	michael	1622	#include "conf_db.h"
58	michael	1632	#include "conf_class.h"
59	michael	4325	#include "ipcache.h"
60	adx	30
61	michael	1858
62			#ifdef HAVE_LIBGEOIP
63			GeoIP *geoip_ctx;
64			#endif
65	michael	2872
66	michael	5602	/* /quote set variables */
67			struct SetOptions GlobalSetOptions;
68			struct Counter Count;
69			struct ServerState_t server_state;
70			struct ServerStatistics ServerStats;
71	adx	30	struct timeval SystemTime;
72	michael	5470	struct Connection meConnection; /* That's also part of me */
73			struct Client me = { .connection = &meConnection }; /* That's me */
74	adx	30
75	michael	5460	char **myargv;
76	adx	30	const char *logFileName = LPATH;
77			const char *pidFileName = PPATH;
78
79	michael	5460	unsigned int dorehash;
80			unsigned int doremotd;
81	michael	3907	unsigned int default_server_capabs;
82	michael	1013	unsigned int splitmode;
83			unsigned int splitchecking;
84			unsigned int split_users;
85	adx	30	unsigned int split_servers;
86
87	michael	4094	static struct event event_cleanup_glines =
88			{
89			.name = "cleanup_glines",
90			.handler = cleanup_glines,
91			.when = CLEANUP_GLINES_TIME
92			};
93
94			static struct event event_cleanup_tklines =
95			{
96			.name = "cleanup_tklines",
97			.handler = cleanup_tklines,
98			.when = CLEANUP_TKLINES_TIME
99			};
100
101			static struct event event_try_connections =
102			{
103			.name = "try_connections",
104			.handler = try_connections,
105			.when = STARTUP_CONNECTIONS_TIME
106			};
107
108			static struct event event_comm_checktimeouts =
109			{
110			.name = "comm_checktimeouts",
111			.handler = comm_checktimeouts,
112			.when = 1
113			};
114
115			static struct event event_save_all_databases =
116			{
117			.name = "save_all_databases",
118			.handler = save_all_databases,
119			.when = DATABASE_UPDATE_TIMEOUT
120			};
121
122			struct event event_write_links_file =
123			{
124			.name = "write_links_file",
125			.handler = write_links_file,
126			};
127
128
129	adx	30	/*
130			* print_startup - print startup information
131			*/
132			static void
133			print_startup(int pid)
134			{
135	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
136	adx	30	printf("ircd: pid %d\n", pid);
137			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
138	michael	4340	: "foreground", ConfigGeneral.dpath);
139	adx	30	}
140
141			static void
142			make_daemon(void)
143			{
144			int pid;
145
146			if ((pid = fork()) < 0)
147			{
148			perror("fork");
149			exit(EXIT_FAILURE);
150			}
151			else if (pid > 0)
152			{
153			print_startup(pid);
154			exit(EXIT_SUCCESS);
155			}
156
157			setsid();
158			}
159
160			static int printVersion = 0;
161
162	michael	3215	static struct lgetopt myopts[] =
163			{
164	michael	4340	{"configfile", &ConfigGeneral.configfile,
165	adx	30	STRING, "File to use for ircd.conf"},
166	michael	4340	{"glinefile", &ConfigGeneral.glinefile,
167	michael	1718	STRING, "File to use for gline database"},
168	michael	4340	{"klinefile", &ConfigGeneral.klinefile,
169	michael	1718	STRING, "File to use for kline database"},
170	michael	4340	{"dlinefile", &ConfigGeneral.dlinefile,
171	michael	1718	STRING, "File to use for dline database"},
172	michael	4340	{"xlinefile", &ConfigGeneral.xlinefile,
173	michael	1718	STRING, "File to use for xline database"},
174	michael	4340	{"resvfile", &ConfigGeneral.resvfile,
175	michael	1718	STRING, "File to use for resv database"},
176	michael	2916	{"logfile", &logFileName,
177	adx	30	STRING, "File to use for ircd.log"},
178			{"pidfile", &pidFileName,
179			STRING, "File to use for process ID"},
180	michael	2916	{"foreground", &server_state.foreground,
181	adx	30	YESNO, "Run in foreground (don't detach)"},
182	michael	2916	{"version", &printVersion,
183	adx	30	YESNO, "Print version and exit"},
184			{"help", NULL, USAGE, "Print this text"},
185			{NULL, NULL, STRING, NULL},
186			};
187
188			void
189			set_time(void)
190			{
191	michael	2978	struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
192	adx	30
193			if (gettimeofday(&newtime, NULL) == -1)
194			{
195	michael	1247	ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
196	adx	30	strerror(errno));
197	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
198	adx	30	"Clock Failure (%s), TS can be corrupted",
199			strerror(errno));
200	michael	3167	server_die("Clock Failure", 1);
201	adx	30	}
202
203			if (newtime.tv_sec < CurrentTime)
204			{
205	michael	2980	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
206			(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
207			sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
208			"System clock is running backwards - (%lu < %lu)",
209			(unsigned long)newtime.tv_sec,
210			(unsigned long)CurrentTime);
211	adx	30	set_back_events(CurrentTime - newtime.tv_sec);
212			}
213
214			SystemTime.tv_sec = newtime.tv_sec;
215			SystemTime.tv_usec = newtime.tv_usec;
216			}
217
218			static void
219			io_loop(void)
220			{
221	michael	3215	while (1)
222	adx	30	{
223			if (listing_client_list.head)
224			{
225	michael	4815	dlink_node node = NULL, node_next = NULL;
226			DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
227			safe_list_channels(node->data, 0);
228	adx	30	}
229
230	michael	4094	/* Run pending events */
231			event_run();
232	adx	30
233			comm_select();
234			exit_aborted_clients();
235			free_exited_clients();
236
237			/* Check to see whether we have to rehash the configuration .. */
238			if (dorehash)
239			{
240	michael	4982	conf_rehash(1);
241	adx	30	dorehash = 0;
242			}
243	michael	3215
244	adx	30	if (doremotd)
245			{
246	michael	2150	motd_recache();
247	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
248	michael	3065	"Got signal SIGUSR1, reloading motd file(s)");
249	adx	30	doremotd = 0;
250			}
251			}
252			}
253
254			/* initalialize_global_set_options()
255			*
256			* inputs - none
257			* output - none
258	michael	2916	* side effects - This sets all global set options needed
259	adx	30	*/
260			static void
261			initialize_global_set_options(void)
262			{
263	michael	5489	GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
264	michael	5499	GlobalSetOptions.autoconn = 1;
265	adx	30	GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
266	michael	5499	GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
267			GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
268	michael	5489	GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
269			GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
270	adx	30
271			split_servers = ConfigChannel.default_split_server_count;
272			split_users = ConfigChannel.default_split_user_count;
273
274			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
275			ConfigChannel.no_join_on_split))
276			{
277			splitmode = 1;
278			splitchecking = 1;
279			}
280
281			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
282			}
283
284			/* initialize_server_capabs()
285			*
286			* inputs - none
287			* output - none
288			*/
289			static void
290			initialize_server_capabs(void)
291			{
292			add_capability("QS", CAP_QS, 1);
293			add_capability("EOB", CAP_EOB, 1);
294	michael	1117	add_capability("TS6", CAP_TS6, 0);
295	adx	30	add_capability("CLUSTER", CAP_CLUSTER, 1);
296	michael	1196	add_capability("SVS", CAP_SVS, 1);
297	michael	3267	add_capability("CHW", CAP_CHW, 1);
298	adx	30	add_capability("HOPS", CAP_HOPS, 1);
299			}
300
301			/* write_pidfile()
302			*
303			* inputs - filename+path of pid file
304			* output - NONE
305			* side effects - write the pid of the ircd to filename
306			*/
307			static void
308			write_pidfile(const char *filename)
309			{
310	michael	1325	FILE *fb;
311	adx	30
312	michael	1325	if ((fb = fopen(filename, "w")))
313	adx	30	{
314	michael	2691	char buff[IRCD_BUFSIZE];
315	adx	30	unsigned int pid = (unsigned int)getpid();
316
317	michael	1325	snprintf(buff, sizeof(buff), "%u\n", pid);
318
319	michael	4736	if (fputs(buff, fb) == -1)
320	michael	5566	ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s: %s",
321	adx	30	pid, filename, strerror(errno));
322
323	michael	1325	fclose(fb);
324	adx	30	}
325			else
326	michael	5566	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
327	michael	4748	filename, strerror(errno));
328	adx	30	}
329
330			/* check_pidfile()
331			*
332			* inputs - filename+path of pid file
333			* output - none
334			* side effects - reads pid from pidfile and checks if ircd is in process
335			* list. if it is, gracefully exits
336			* -kre
337			*/
338			static void
339			check_pidfile(const char *filename)
340			{
341	michael	1325	FILE *fb;
342	michael	2691	char buff[IRCD_BUFSIZE];
343	adx	30	pid_t pidfromfile;
344
345			/* Don't do logging here, since we don't have log() initialised */
346	michael	1325	if ((fb = fopen(filename, "r")))
347	adx	30	{
348	michael	4733	if (!fgets(buff, 20, fb))
349	adx	30	{
350			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
351			* strerror(errno));
352			*/
353			}
354			else
355			{
356			pidfromfile = atoi(buff);
357
358			if (!kill(pidfromfile, 0))
359			{
360			/* log(L_ERROR, "Server is already running"); */
361			printf("ircd: daemon is already running\n");
362			exit(-1);
363			}
364			}
365
366	michael	1325	fclose(fb);
367	adx	30	}
368			else if (errno != ENOENT)
369			{
370			/* log(L_ERROR, "Error opening pid file %s", filename); */
371			}
372			}
373
374			/* setup_corefile()
375			*
376			* inputs - nothing
377			* output - nothing
378			* side effects - setups corefile to system limits.
379			* -kre
380			*/
381			static void
382			setup_corefile(void)
383			{
384			#ifdef HAVE_SYS_RESOURCE_H
385			struct rlimit rlim; /* resource limits */
386
387			/* Set corefilesize to maximum */
388			if (!getrlimit(RLIMIT_CORE, &rlim))
389			{
390			rlim.rlim_cur = rlim.rlim_max;
391			setrlimit(RLIMIT_CORE, &rlim);
392			}
393			#endif
394			}
395
396	michael	2228	#ifdef HAVE_LIBCRYPTO
397			static int
398			always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
399			{
400			return 1;
401			}
402			#endif
403
404	adx	30	/* init_ssl()
405			*
406			* inputs - nothing
407			* output - nothing
408			* side effects - setups SSL context.
409			*/
410			static void
411	michael	1798	ssl_init(void)
412	adx	30	{
413			#ifdef HAVE_LIBCRYPTO
414			SSL_load_error_strings();
415			SSLeay_add_ssl_algorithms();
416
417	michael	4733	if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
418	adx	30	{
419	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
420	adx	30
421	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
422	michael	4763	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s);
423	michael	4497	exit(EXIT_FAILURE);
424	michael	4751	return; /* Not reached */
425	adx	30	}
426
427	michael	4730	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
428	michael	4593	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE\|SSL_OP_CIPHER_SERVER_PREFERENCE);
429	michael	4340	SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
430	michael	2228	always_accept_verify_cb);
431	michael	4730	SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
432	michael	4892	SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");
433	adx	30
434	michael	4744	#if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH)
435	michael	4070	{
436			EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
437
438			if (key)
439			{
440	michael	4340	SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
441	michael	4070	EC_KEY_free(key);
442			}
443			}
444
445	michael	4340	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
446	michael	4070	#endif
447
448	michael	4733	if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
449	michael	1303	{
450	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
451	michael	1303
452	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
453	michael	4763	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s);
454	michael	4497	exit(EXIT_FAILURE);
455	michael	4751	return; /* Not reached */
456	michael	1303	}
457
458	michael	4730	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
459	michael	4340	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
460			SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
461	michael	2228	always_accept_verify_cb);
462	michael	4730	SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
463	adx	30	#endif /* HAVE_LIBCRYPTO */
464			}
465
466			int
467			main(int argc, char *argv[])
468			{
469	michael	2253	/* Check to see if the user is running us as root, which is a nono */
470	michael	4733	if (!geteuid())
471	adx	30	{
472	michael	3525	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
473	michael	982	return -1;
474	adx	30	}
475
476			/* Setup corefile size immediately after boot -kre */
477			setup_corefile();
478
479	michael	5545	/* Save server boot time right away, so getrusage works correctly */
480	adx	30	set_time();
481
482	michael	5545	/* It's not random, but it ought to be a little harder to guess */
483	michael	982	init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
484
485	michael	5545	dlinkAdd(&me, &me.node, &global_client_list);
486
487	michael	4340	ConfigGeneral.dpath = DPATH;
488			ConfigGeneral.spath = SPATH;
489			ConfigGeneral.mpath = MPATH;
490			ConfigGeneral.configfile = CPATH; /* Server configuration file */
491			ConfigGeneral.klinefile = KPATH; /* Server kline file */
492			ConfigGeneral.glinefile = GPATH; /* Server gline file */
493			ConfigGeneral.xlinefile = XPATH; /* Server xline file */
494			ConfigGeneral.dlinefile = DLPATH; /* dline file */
495			ConfigGeneral.resvfile = RESVPATH; /* resv file */
496	michael	1702
497	adx	30	myargv = argv;
498			umask(077); /* better safe than sorry --SRB */
499
500			parseargs(&argc, &argv, myopts);
501
502			if (printVersion)
503			{
504	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
505	adx	30	exit(EXIT_SUCCESS);
506			}
507
508	michael	4340	if (chdir(ConfigGeneral.dpath))
509	adx	30	{
510			perror("chdir");
511			exit(EXIT_FAILURE);
512			}
513
514	michael	1798	ssl_init();
515	adx	30
516			if (!server_state.foreground)
517			{
518			make_daemon();
519			close_standard_fds(); /* this needs to be before init_netio()! */
520			}
521			else
522			print_startup(getpid());
523
524			setup_signals();
525
526			/* We need this to initialise the fd array before anything else */
527			fdlist_init();
528	michael	1831	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
529	michael	4415
530	michael	2632	init_netio(); /* This needs to be setup early ! -- adrian */
531	michael	2253
532	adx	30	/* Check if there is pidfile and daemon already running */
533			check_pidfile(pidFileName);
534
535	michael	1654	mp_pool_init();
536	adx	30	init_dlink_nodes();
537	michael	2159	init_isupport();
538	adx	30	dbuf_init();
539	michael	1798	hash_init();
540	michael	4319	ipcache_init();
541	michael	1798	client_init();
542	michael	1632	class_init();
543	michael	1358	whowas_init();
544	michael	876	watch_init();
545	michael	1798	auth_init(); /* Initialise the auth code */
546	michael	998	init_resolver(); /* Needs to be setup before the io loop */
547	michael	1404	modules_init();
548	adx	30	read_conf_files(1); /* cold start init conf files */
549			init_uid();
550			initialize_server_capabs(); /* Set up default_server_capabs */
551	michael	5489	initialize_global_set_options(); /* Has to be called after read_conf_files() */
552	michael	1798	channel_init();
553	michael	2216	read_links_file();
554	michael	2150	motd_init();
555	michael	5392	user_usermodes_init();
556	michael	1858	#ifdef HAVE_LIBGEOIP
557			geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
558			#endif
559	adx	30
560	michael	4340	if (EmptyString(ConfigServerInfo.sid))
561	adx	30	{
562	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
563	adx	30	exit(EXIT_FAILURE);
564			}
565	michael	885
566	michael	4340	strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
567	michael	1115
568	michael	4340	if (EmptyString(ConfigServerInfo.name))
569	michael	1115	{
570	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
571	michael	1115	exit(EXIT_FAILURE);
572			}
573
574	michael	4340	strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
575	adx	30
576			/* serverinfo{} description must exist. If not, error out.*/
577	michael	4340	if (EmptyString(ConfigServerInfo.description))
578	adx	30	{
579	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
580	adx	30	exit(EXIT_FAILURE);
581			}
582	michael	885
583	michael	4340	strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
584	adx	30
585	michael	5545	me.from = &me;
586			me.servptr = &me;
587			me.connection->lasttime = CurrentTime;
588			me.connection->since = CurrentTime;
589	michael	4588	me.connection->firsttime = CurrentTime;
590	adx	30
591			SetMe(&me);
592			make_server(&me);
593
594	michael	1115	hash_add_id(&me);
595	adx	30	hash_add_client(&me);
596	michael	2916
597	michael	4209	dlinkAdd(&me, make_dlink_node(), &global_server_list);
598	adx	30
599	michael	1622	load_kline_database();
600			load_dline_database();
601			load_gline_database();
602			load_xline_database();
603			load_resv_database();
604
605	adx	30	load_all_modules(1);
606			load_conf_modules();
607			load_core_modules(1);
608	michael	1115
609	adx	30	write_pidfile(pidFileName);
610
611	michael	1247	ilog(LOG_TYPE_IRCD, "Server Ready");
612	adx	30
613	michael	4094	event_addish(&event_cleanup_glines, NULL);
614			event_addish(&event_cleanup_tklines, NULL);
615	adx	30
616			/* We want try_connections to be called as soon as possible now! -- adrian */
617			/* No, 'cause after a restart it would cause all sorts of nick collides */
618	michael	4094	event_addish(&event_try_connections, NULL);
619	adx	30
620			/* Setup the timeout check. I'll shift it later :) -- adrian */
621	michael	4399	event_add(&event_comm_checktimeouts, NULL);
622	adx	30
623	michael	4094	event_addish(&event_save_all_databases, NULL);
624	michael	1625
625	adx	30	if (ConfigServerHide.links_delay > 0)
626	michael	4094	{
627			event_write_links_file.when = ConfigServerHide.links_delay;
628			event_addish(&event_write_links_file, NULL);
629			}
630	adx	30	else
631			ConfigServerHide.links_disabled = 1;
632
633			if (splitmode)
634	michael	4133	event_addish(&splitmode_event, NULL);
635	adx	30
636			io_loop();
637	michael	885	return 0;
638	adx	30	}