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., 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

struct timeval SystemTime;
struct Client me;             /* That's me */
struct Connection meConnection; /* 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))
    {
      /* 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\n", s);
    exit(EXIT_FAILURE);
  }

  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);

#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())))
  {
    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);
    exit(EXIT_FAILURE);
  }

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

  me.connection = &meConnection;
  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);

  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.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();

  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:	4733
Committed:	Sun Oct 12 11:58:19 2014 UTC (10 years, 10 months ago) by michael
Content type:	text/x-csrc
File size:	17027 byte(s)
Log Message:	- ircd.c: style corrections
#	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	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	adx	30	struct timeval SystemTime;
67			struct Client me; /* That's me */
68	michael	4576	struct Connection meConnection; /* That's also part of me */
69	adx	30
70			const char *logFileName = LPATH;
71			const char *pidFileName = PPATH;
72
73			char **myargv;
74
75			int dorehash = 0;
76			int doremotd = 0;
77
78			/* Set to zero because it should be initialized later using
79			* initialize_server_capabs
80			*/
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			dlink_node ptr = NULL, ptr_next = NULL;
226			DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
227	michael	3288	safe_list_channels(ptr->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			rehash(1);
241			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			GlobalSetOptions.autoconn = 1;
264			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
265			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
266
267	michael	4340	if (ConfigGeneral.default_floodcount)
268			GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
269	adx	30	else
270			GlobalSetOptions.floodcount = 10;
271
272			/* XXX I have no idea what to try here - Dianora */
273			GlobalSetOptions.joinfloodcount = 16;
274			GlobalSetOptions.joinfloodtime = 8;
275
276			split_servers = ConfigChannel.default_split_server_count;
277			split_users = ConfigChannel.default_split_user_count;
278
279			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
280			ConfigChannel.no_join_on_split))
281			{
282			splitmode = 1;
283			splitchecking = 1;
284			}
285
286			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
287			}
288
289			/* initialize_server_capabs()
290			*
291			* inputs - none
292			* output - none
293			*/
294			static void
295			initialize_server_capabs(void)
296			{
297			add_capability("QS", CAP_QS, 1);
298			add_capability("EOB", CAP_EOB, 1);
299	michael	1117	add_capability("TS6", CAP_TS6, 0);
300	adx	30	add_capability("CLUSTER", CAP_CLUSTER, 1);
301	michael	1196	add_capability("SVS", CAP_SVS, 1);
302	michael	3267	add_capability("CHW", CAP_CHW, 1);
303	adx	30	add_capability("HOPS", CAP_HOPS, 1);
304			}
305
306			/* write_pidfile()
307			*
308			* inputs - filename+path of pid file
309			* output - NONE
310			* side effects - write the pid of the ircd to filename
311			*/
312			static void
313			write_pidfile(const char *filename)
314			{
315	michael	1325	FILE *fb;
316	adx	30
317	michael	1325	if ((fb = fopen(filename, "w")))
318	adx	30	{
319	michael	2691	char buff[IRCD_BUFSIZE];
320	adx	30	unsigned int pid = (unsigned int)getpid();
321
322	michael	1325	snprintf(buff, sizeof(buff), "%u\n", pid);
323
324			if ((fputs(buff, fb) == -1))
325	michael	1247	ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
326	adx	30	pid, filename, strerror(errno));
327
328	michael	1325	fclose(fb);
329	adx	30	}
330			else
331			{
332	michael	1247	ilog(LOG_TYPE_IRCD, "Error opening pid file %s", filename);
333	adx	30	}
334			}
335
336			/* check_pidfile()
337			*
338			* inputs - filename+path of pid file
339			* output - none
340			* side effects - reads pid from pidfile and checks if ircd is in process
341			* list. if it is, gracefully exits
342			* -kre
343			*/
344			static void
345			check_pidfile(const char *filename)
346			{
347	michael	1325	FILE *fb;
348	michael	2691	char buff[IRCD_BUFSIZE];
349	adx	30	pid_t pidfromfile;
350
351			/* Don't do logging here, since we don't have log() initialised */
352	michael	1325	if ((fb = fopen(filename, "r")))
353	adx	30	{
354	michael	4733	if (!fgets(buff, 20, fb))
355	adx	30	{
356			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
357			* strerror(errno));
358			*/
359			}
360			else
361			{
362			pidfromfile = atoi(buff);
363
364			if (!kill(pidfromfile, 0))
365			{
366			/* log(L_ERROR, "Server is already running"); */
367			printf("ircd: daemon is already running\n");
368			exit(-1);
369			}
370			}
371
372	michael	1325	fclose(fb);
373	adx	30	}
374			else if (errno != ENOENT)
375			{
376			/* log(L_ERROR, "Error opening pid file %s", filename); */
377			}
378			}
379
380			/* setup_corefile()
381			*
382			* inputs - nothing
383			* output - nothing
384			* side effects - setups corefile to system limits.
385			* -kre
386			*/
387			static void
388			setup_corefile(void)
389			{
390			#ifdef HAVE_SYS_RESOURCE_H
391			struct rlimit rlim; /* resource limits */
392
393			/* Set corefilesize to maximum */
394			if (!getrlimit(RLIMIT_CORE, &rlim))
395			{
396			rlim.rlim_cur = rlim.rlim_max;
397			setrlimit(RLIMIT_CORE, &rlim);
398			}
399			#endif
400			}
401
402	michael	2228	#ifdef HAVE_LIBCRYPTO
403			static int
404			always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
405			{
406			return 1;
407			}
408			#endif
409
410	adx	30	/* init_ssl()
411			*
412			* inputs - nothing
413			* output - nothing
414			* side effects - setups SSL context.
415			*/
416			static void
417	michael	1798	ssl_init(void)
418	adx	30	{
419			#ifdef HAVE_LIBCRYPTO
420			SSL_load_error_strings();
421			SSLeay_add_ssl_algorithms();
422
423	michael	4733	if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
424	adx	30	{
425	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
426	adx	30
427	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
428	michael	1303	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
429	michael	4497	exit(EXIT_FAILURE);
430	adx	30	}
431
432	michael	4730	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
433	michael	4593	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE\|SSL_OP_CIPHER_SERVER_PREFERENCE);
434	michael	4340	SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
435	michael	2228	always_accept_verify_cb);
436	michael	4730	SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
437	adx	30
438	michael	4070	#if OPENSSL_VERSION_NUMBER >= 0x1000005FL && !defined(OPENSSL_NO_ECDH)
439			{
440			EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
441
442			if (key)
443			{
444	michael	4340	SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
445	michael	4070	EC_KEY_free(key);
446			}
447			}
448
449	michael	4340	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
450	michael	4070	#endif
451
452	michael	4733	if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
453	michael	1303	{
454	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
455	michael	1303
456	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
457	michael	1303	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
458	michael	4497	exit(EXIT_FAILURE);
459	michael	1303	}
460
461	michael	4730	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
462	michael	4340	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
463			SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
464	michael	2228	always_accept_verify_cb);
465	michael	4730	SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
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	michael	4733	if (!geteuid())
474	adx	30	{
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	michael	4588	me.connection = &meConnection;
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	michael	4415
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	michael	4588	me.connection->lasttime = CurrentTime;
593			me.connection->since = CurrentTime;
594			me.connection->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	}