8.2.x/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

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;

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

  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 ain't 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);  /* 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();
  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:	5488
Committed:	Sun Feb 8 14:50:36 2015 UTC (9 years, 2 months ago) by michael
Content type:	text/x-csrc
File size:	16818 byte(s)
Log Message:	- Fixed bug where "/rehash" would always reset the "MAX", "JFLOODTIME", and "JFLOODCOUNT" values that have been changed from within IRC via the "/set" command - Renamed the following ircd.conf configuration directives to be more descriptive: max_clients -> default_max_clients join_flood_count -> default_join_flood_count join_flood_time -> default_join_flood_time - Updated related ircd.conf documentation accordingly
#	User	Rev	Content
1	adx	30	/*
2	michael	2916	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	5346	* 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	4564	* 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	4326	#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	michael	5471	struct Connection meConnection; /* That's also part of me */
68			struct Client me = { .connection = &meConnection }; /* That's me */
69	adx	30
70	michael	5459	char **myargv;
71	adx	30	const char *logFileName = LPATH;
72			const char *pidFileName = PPATH;
73
74	michael	5459	unsigned int dorehash;
75			unsigned int doremotd;
76	michael	3906	unsigned int default_server_capabs;
77	michael	1013	unsigned int splitmode;
78			unsigned int splitchecking;
79			unsigned int split_users;
80	adx	30	unsigned int split_servers;
81
82	michael	4095	static struct event event_cleanup_glines =
83			{
84			.name = "cleanup_glines",
85			.handler = cleanup_glines,
86			.when = CLEANUP_GLINES_TIME
87			};
88
89			static struct event event_cleanup_tklines =
90			{
91			.name = "cleanup_tklines",
92			.handler = cleanup_tklines,
93			.when = CLEANUP_TKLINES_TIME
94			};
95
96			static struct event event_try_connections =
97			{
98			.name = "try_connections",
99			.handler = try_connections,
100			.when = STARTUP_CONNECTIONS_TIME
101			};
102
103			static struct event event_comm_checktimeouts =
104			{
105			.name = "comm_checktimeouts",
106			.handler = comm_checktimeouts,
107			.when = 1
108			};
109
110			static struct event event_save_all_databases =
111			{
112			.name = "save_all_databases",
113			.handler = save_all_databases,
114			.when = DATABASE_UPDATE_TIMEOUT
115			};
116
117			struct event event_write_links_file =
118			{
119			.name = "write_links_file",
120			.handler = write_links_file,
121			};
122
123
124	adx	30	/*
125			* print_startup - print startup information
126			*/
127			static void
128			print_startup(int pid)
129			{
130	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
131	adx	30	printf("ircd: pid %d\n", pid);
132			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
133	michael	4341	: "foreground", ConfigGeneral.dpath);
134	adx	30	}
135
136			static void
137			make_daemon(void)
138			{
139			int pid;
140
141			if ((pid = fork()) < 0)
142			{
143			perror("fork");
144			exit(EXIT_FAILURE);
145			}
146			else if (pid > 0)
147			{
148			print_startup(pid);
149			exit(EXIT_SUCCESS);
150			}
151
152			setsid();
153			}
154
155			static int printVersion = 0;
156
157	michael	3215	static struct lgetopt myopts[] =
158			{
159	michael	4341	{"configfile", &ConfigGeneral.configfile,
160	adx	30	STRING, "File to use for ircd.conf"},
161	michael	4341	{"glinefile", &ConfigGeneral.glinefile,
162	michael	1718	STRING, "File to use for gline database"},
163	michael	4341	{"klinefile", &ConfigGeneral.klinefile,
164	michael	1718	STRING, "File to use for kline database"},
165	michael	4341	{"dlinefile", &ConfigGeneral.dlinefile,
166	michael	1718	STRING, "File to use for dline database"},
167	michael	4341	{"xlinefile", &ConfigGeneral.xlinefile,
168	michael	1718	STRING, "File to use for xline database"},
169	michael	4341	{"resvfile", &ConfigGeneral.resvfile,
170	michael	1718	STRING, "File to use for resv database"},
171	michael	2916	{"logfile", &logFileName,
172	adx	30	STRING, "File to use for ircd.log"},
173			{"pidfile", &pidFileName,
174			STRING, "File to use for process ID"},
175	michael	2916	{"foreground", &server_state.foreground,
176	adx	30	YESNO, "Run in foreground (don't detach)"},
177	michael	2916	{"version", &printVersion,
178	adx	30	YESNO, "Print version and exit"},
179			{"help", NULL, USAGE, "Print this text"},
180			{NULL, NULL, STRING, NULL},
181			};
182
183			void
184			set_time(void)
185			{
186	michael	2978	struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
187	adx	30
188			if (gettimeofday(&newtime, NULL) == -1)
189			{
190	michael	1247	ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
191	adx	30	strerror(errno));
192	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
193	adx	30	"Clock Failure (%s), TS can be corrupted",
194			strerror(errno));
195	michael	3167	server_die("Clock Failure", 1);
196	adx	30	}
197
198			if (newtime.tv_sec < CurrentTime)
199			{
200	michael	2980	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
201			(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
202			sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
203			"System clock is running backwards - (%lu < %lu)",
204			(unsigned long)newtime.tv_sec,
205			(unsigned long)CurrentTime);
206	adx	30	set_back_events(CurrentTime - newtime.tv_sec);
207			}
208
209			SystemTime.tv_sec = newtime.tv_sec;
210			SystemTime.tv_usec = newtime.tv_usec;
211			}
212
213			static void
214			io_loop(void)
215			{
216	michael	3215	while (1)
217	adx	30	{
218			if (listing_client_list.head)
219			{
220	michael	4816	dlink_node node = NULL, node_next = NULL;
221			DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
222			safe_list_channels(node->data, 0);
223	adx	30	}
224
225	michael	4095	/* Run pending events */
226			event_run();
227	adx	30
228			comm_select();
229			exit_aborted_clients();
230			free_exited_clients();
231
232			/* Check to see whether we have to rehash the configuration .. */
233			if (dorehash)
234			{
235	michael	4983	conf_rehash(1);
236	adx	30	dorehash = 0;
237			}
238	michael	3215
239	adx	30	if (doremotd)
240			{
241	michael	2150	motd_recache();
242	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
243	michael	3065	"Got signal SIGUSR1, reloading motd file(s)");
244	adx	30	doremotd = 0;
245			}
246			}
247			}
248
249			/* initalialize_global_set_options()
250			*
251			* inputs - none
252			* output - none
253	michael	2916	* side effects - This sets all global set options needed
254	adx	30	*/
255			static void
256			initialize_global_set_options(void)
257			{
258	michael	5488	GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
259	adx	30	GlobalSetOptions.autoconn = 1;
260			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
261			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
262
263	michael	4341	if (ConfigGeneral.default_floodcount)
264			GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
265	adx	30	else
266			GlobalSetOptions.floodcount = 10;
267
268	michael	5488	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	4735	if (fputs(buff, fb) == -1)
320	michael	1247	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			{
327	michael	4749	ilog(LOG_TYPE_IRCD, "Error opening pid file %s (%s)",
328			filename, strerror(errno));
329	adx	30	}
330			}
331
332			/* check_pidfile()
333			*
334			* inputs - filename+path of pid file
335			* output - none
336			* side effects - reads pid from pidfile and checks if ircd is in process
337			* list. if it is, gracefully exits
338			* -kre
339			*/
340			static void
341			check_pidfile(const char *filename)
342			{
343	michael	1325	FILE *fb;
344	michael	2691	char buff[IRCD_BUFSIZE];
345	adx	30	pid_t pidfromfile;
346
347			/* Don't do logging here, since we don't have log() initialised */
348	michael	1325	if ((fb = fopen(filename, "r")))
349	adx	30	{
350	michael	4734	if (!fgets(buff, 20, fb))
351	adx	30	{
352			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
353			* strerror(errno));
354			*/
355			}
356			else
357			{
358			pidfromfile = atoi(buff);
359
360			if (!kill(pidfromfile, 0))
361			{
362			/* log(L_ERROR, "Server is already running"); */
363			printf("ircd: daemon is already running\n");
364			exit(-1);
365			}
366			}
367
368	michael	1325	fclose(fb);
369	adx	30	}
370			else if (errno != ENOENT)
371			{
372			/* log(L_ERROR, "Error opening pid file %s", filename); */
373			}
374			}
375
376			/* setup_corefile()
377			*
378			* inputs - nothing
379			* output - nothing
380			* side effects - setups corefile to system limits.
381			* -kre
382			*/
383			static void
384			setup_corefile(void)
385			{
386			#ifdef HAVE_SYS_RESOURCE_H
387			struct rlimit rlim; /* resource limits */
388
389			/* Set corefilesize to maximum */
390			if (!getrlimit(RLIMIT_CORE, &rlim))
391			{
392			rlim.rlim_cur = rlim.rlim_max;
393			setrlimit(RLIMIT_CORE, &rlim);
394			}
395			#endif
396			}
397
398	michael	2228	#ifdef HAVE_LIBCRYPTO
399			static int
400			always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
401			{
402			return 1;
403			}
404			#endif
405
406	adx	30	/* init_ssl()
407			*
408			* inputs - nothing
409			* output - nothing
410			* side effects - setups SSL context.
411			*/
412			static void
413	michael	1798	ssl_init(void)
414	adx	30	{
415			#ifdef HAVE_LIBCRYPTO
416			SSL_load_error_strings();
417			SSLeay_add_ssl_algorithms();
418
419	michael	4734	if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
420	adx	30	{
421	michael	4128	const char *s = ERR_lib_error_string(ERR_get_error());
422	adx	30
423	michael	4128	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
424	michael	4762	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s);
425	michael	4498	exit(EXIT_FAILURE);
426	michael	4750	return; /* Not reached */
427	adx	30	}
428
429	michael	4729	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
430	michael	4592	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE\|SSL_OP_CIPHER_SERVER_PREFERENCE);
431	michael	4341	SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
432	michael	2228	always_accept_verify_cb);
433	michael	4729	SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
434	michael	4891	SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");
435	adx	30
436	michael	4745	#if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH)
437	michael	4071	{
438			EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
439
440			if (key)
441			{
442	michael	4341	SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
443	michael	4071	EC_KEY_free(key);
444			}
445			}
446
447	michael	4341	SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
448	michael	4071	#endif
449
450	michael	4734	if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
451	michael	1303	{
452	michael	4128	const char *s = ERR_lib_error_string(ERR_get_error());
453	michael	1303
454	michael	4128	fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
455	michael	4762	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s);
456	michael	4498	exit(EXIT_FAILURE);
457	michael	4750	return; /* Not reached */
458	michael	1303	}
459
460	michael	4729	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TICKET);
461	michael	4341	SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
462			SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
463	michael	2228	always_accept_verify_cb);
464	michael	4729	SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
465	adx	30	#endif /* HAVE_LIBCRYPTO */
466			}
467
468			int
469			main(int argc, char *argv[])
470			{
471	michael	2253	/* Check to see if the user is running us as root, which is a nono */
472	michael	4734	if (!geteuid())
473	adx	30	{
474	michael	3526	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
475	michael	982	return -1;
476	adx	30	}
477
478			/* Setup corefile size immediately after boot -kre */
479			setup_corefile();
480
481			/* save server boot time right away, so getrusage works correctly */
482			set_time();
483
484	michael	982	/* It ain't random, but it ought to be a little harder to guess */
485			init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
486
487	michael	2253	dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
488	adx	30	of Client list */
489	michael	4341	ConfigLog.use_logging = 1;
490			ConfigGeneral.dpath = DPATH;
491			ConfigGeneral.spath = SPATH;
492			ConfigGeneral.mpath = MPATH;
493			ConfigGeneral.configfile = CPATH; /* Server configuration file */
494			ConfigGeneral.klinefile = KPATH; /* Server kline file */
495			ConfigGeneral.glinefile = GPATH; /* Server gline file */
496			ConfigGeneral.xlinefile = XPATH; /* Server xline file */
497			ConfigGeneral.dlinefile = DLPATH; /* dline file */
498			ConfigGeneral.resvfile = RESVPATH; /* resv file */
499	michael	1702
500	adx	30	myargv = argv;
501			umask(077); /* better safe than sorry --SRB */
502
503			parseargs(&argc, &argv, myopts);
504
505			if (printVersion)
506			{
507	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
508	adx	30	exit(EXIT_SUCCESS);
509			}
510
511	michael	4341	if (chdir(ConfigGeneral.dpath))
512	adx	30	{
513			perror("chdir");
514			exit(EXIT_FAILURE);
515			}
516
517	michael	1798	ssl_init();
518	adx	30
519			if (!server_state.foreground)
520			{
521			make_daemon();
522			close_standard_fds(); /* this needs to be before init_netio()! */
523			}
524			else
525			print_startup(getpid());
526
527			setup_signals();
528
529			/* We need this to initialise the fd array before anything else */
530			fdlist_init();
531	michael	1831	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
532	michael	4414
533	michael	2632	init_netio(); /* This needs to be setup early ! -- adrian */
534	michael	2253
535	adx	30	/* Check if there is pidfile and daemon already running */
536			check_pidfile(pidFileName);
537
538	michael	1654	mp_pool_init();
539	adx	30	init_dlink_nodes();
540	michael	2159	init_isupport();
541	adx	30	dbuf_init();
542	michael	1798	hash_init();
543	michael	4320	ipcache_init();
544	michael	1798	client_init();
545	michael	1632	class_init();
546	michael	1358	whowas_init();
547	michael	876	watch_init();
548	michael	1798	auth_init(); /* Initialise the auth code */
549	michael	998	init_resolver(); /* Needs to be setup before the io loop */
550	michael	1404	modules_init();
551	adx	30	read_conf_files(1); /* cold start init conf files */
552			init_uid();
553			initialize_server_capabs(); /* Set up default_server_capabs */
554	michael	5488	initialize_global_set_options(); /* Has to be called after read_conf_files() */
555	michael	1798	channel_init();
556	michael	2216	read_links_file();
557	michael	2150	motd_init();
558	michael	5393	user_usermodes_init();
559	michael	1858	#ifdef HAVE_LIBGEOIP
560			geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
561			#endif
562	adx	30
563	michael	4341	if (EmptyString(ConfigServerInfo.sid))
564	adx	30	{
565	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
566	adx	30	exit(EXIT_FAILURE);
567			}
568	michael	885
569	michael	4341	strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
570	michael	1115
571	michael	4341	if (EmptyString(ConfigServerInfo.name))
572	michael	1115	{
573	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
574	michael	1115	exit(EXIT_FAILURE);
575			}
576
577	michael	4341	strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
578	adx	30
579			/* serverinfo{} description must exist. If not, error out.*/
580	michael	4341	if (EmptyString(ConfigServerInfo.description))
581	adx	30	{
582	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
583	adx	30	exit(EXIT_FAILURE);
584			}
585	michael	885
586	michael	4341	strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
587	adx	30
588	michael	1241	me.from = &me;
589			me.servptr = &me;
590	michael	4589	me.connection->lasttime = CurrentTime;
591			me.connection->since = CurrentTime;
592			me.connection->firsttime = CurrentTime;
593	adx	30
594			SetMe(&me);
595			make_server(&me);
596
597	michael	1115	hash_add_id(&me);
598	adx	30	hash_add_client(&me);
599	michael	2916
600	michael	4208	dlinkAdd(&me, make_dlink_node(), &global_server_list);
601	adx	30
602	michael	1622	load_kline_database();
603			load_dline_database();
604			load_gline_database();
605			load_xline_database();
606			load_resv_database();
607
608	adx	30	load_all_modules(1);
609			load_conf_modules();
610			load_core_modules(1);
611	michael	1115
612	adx	30	write_pidfile(pidFileName);
613
614	michael	1247	ilog(LOG_TYPE_IRCD, "Server Ready");
615	adx	30
616	michael	4095	event_addish(&event_cleanup_glines, NULL);
617			event_addish(&event_cleanup_tklines, NULL);
618	adx	30
619			/* We want try_connections to be called as soon as possible now! -- adrian */
620			/* No, 'cause after a restart it would cause all sorts of nick collides */
621	michael	4095	event_addish(&event_try_connections, NULL);
622	adx	30
623			/* Setup the timeout check. I'll shift it later :) -- adrian */
624	michael	4398	event_add(&event_comm_checktimeouts, NULL);
625	adx	30
626	michael	4095	event_addish(&event_save_all_databases, NULL);
627	michael	1625
628	adx	30	if (ConfigServerHide.links_delay > 0)
629	michael	4095	{
630			event_write_links_file.when = ConfigServerHide.links_delay;
631			event_addish(&event_write_links_file, NULL);
632			}
633	adx	30	else
634			ConfigServerHide.links_disabled = 1;
635
636			if (splitmode)
637	michael	4132	event_addish(&splitmode_event, NULL);
638	adx	30
639			io_loop();
640	michael	885	return 0;
641	adx	30	}