trunk/src/ircd.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2014 ircd-hybrid development team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 */

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

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


#ifdef HAVE_LIBGEOIP
GeoIP *geoip_ctx;
#endif

struct ServerStatistics ServerStats;
struct timeval SystemTime;
struct Client me;             /* That's me */
struct LocalUser meLocalUser; /* That's also part of me */

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

char **myargv;

int dorehash = 0;
int doremotd = 0;

/* Set to zero because it should be initialized later using
 * initialize_server_capabs
 */
unsigned int default_server_capabs;
unsigned int splitmode;
unsigned int splitchecking;
unsigned int split_users;
unsigned int split_servers;

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

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

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

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

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

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


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

static void
make_daemon(void)
{
  int pid;

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

  setsid();
}

static int printVersion = 0;

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

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

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

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

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

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

    /* Run pending events */
    event_run();

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

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

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

/* initalialize_global_set_options()
 *
 * inputs       - none
 * output       - none
 * side effects - This sets all global set options needed
 */
static void
initialize_global_set_options(void)
{
  memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));

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

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

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

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

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

  GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
  /* End of global set options */
}

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

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

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

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

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

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

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

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

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

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

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

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

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

/* init_ssl()
 *
 * inputs       - nothing
 * output       - nothing
 * side effects - setups SSL context.
 */
static void
ssl_init(void)
{
#ifdef HAVE_LIBCRYPTO
  const unsigned char session_id[] = "ircd-hybrid";

  SSL_load_error_strings();
  SSLeay_add_ssl_algorithms();

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

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

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

#if OPENSSL_VERSION_NUMBER >= 0x1000005FL && !defined(OPENSSL_NO_ECDH)
  {
    EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);

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

  SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
#endif

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

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

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

int
main(int argc, char *argv[])
{
  /* Check to see if the user is running us as root, which is a nono */
  if (geteuid() == 0)
  {
    fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
    return -1;
  }

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

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

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

  me.localClient = &meLocalUser;
  dlinkAdd(&me, &me.node, &global_client_list);  /* Pointer to beginning
                                                   of Client list */
  ConfigLoggingEntry.use_logging = 1;
  ConfigFileEntry.dpath      = DPATH;
  ConfigFileEntry.spath      = SPATH;
  ConfigFileEntry.mpath      = MPATH;
  ConfigFileEntry.configfile = CPATH;    /* Server configuration file */
  ConfigFileEntry.klinefile  = KPATH;    /* Server kline file         */
  ConfigFileEntry.glinefile  = GPATH;    /* Server gline file         */
  ConfigFileEntry.xlinefile  = XPATH;    /* Server xline file         */
  ConfigFileEntry.dlinefile  = DLPATH;   /* dline file                */
  ConfigFileEntry.resvfile   = RESVPATH; /* resv file                 */

  myargv = argv;
  umask(077);                /* better safe than sorry --SRB */

  parseargs(&argc, &argv, myopts);

  if (printVersion)
  {
    printf("ircd: version %s(%s)\n", ircd_version, serno);
    exit(EXIT_SUCCESS);
  }

  if (chdir(ConfigFileEntry.dpath))
  {
    perror("chdir");
    exit(EXIT_FAILURE);
  }

  ssl_init();

  if (!server_state.foreground)
  {
    make_daemon();
    close_standard_fds(); /* this needs to be before init_netio()! */
  }
  else
    print_startup(getpid());

  setup_signals();

  /* We need this to initialise the fd array before anything else */
  fdlist_init();
  log_set_file(LOG_TYPE_IRCD, 0, logFileName);
  check_can_use_v6();
  init_netio();         /* This needs to be setup early ! -- adrian */

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

  mp_pool_init();
  init_dlink_nodes();
  init_isupport();
  dbuf_init();
  hash_init();
  init_ip_hash_table();      /* client host ip hash table */
  init_host_hash();          /* Host-hashtable. */
  client_init();
  class_init();
  whowas_init();
  watch_init();
  auth_init();          /* Initialise the auth code */
  init_resolver();      /* Needs to be setup before the io loop */
  modules_init();
  read_conf_files(1);   /* cold start init conf files */
  init_uid();
  initialize_server_capabs();   /* Set up default_server_capabs */
  initialize_global_set_options();
  channel_init();
  read_links_file();
  motd_init();
#ifdef HAVE_LIBGEOIP
  geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
#endif

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

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

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

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

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

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

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

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

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

  /* add ourselves to global_serv_list */
  dlinkAdd(&me, make_dlink_node(), &global_serv_list);

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

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

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

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

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

  write_pidfile(pidFileName);

  ilog(LOG_TYPE_IRCD, "Server Ready");

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

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

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

  event_addish(&event_save_all_databases, NULL);

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

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

  io_loop();
  return 0;
}
Revision:	4162
Committed:	Thu Jul 3 19:39:31 2014 UTC (11 years, 1 month ago) by michael
Content type:	text/x-csrc
File size:	17084 byte(s)
Log Message:	- Removed ssl_server_method and ssl_client_method configuration options. ircd now only allows TLSv1, TLSv1.1 and TLSv1.2 protocols depending on the OpenSSL version.
#	User	Rev	Content
1	adx	30	/*
2	michael	2916	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	2916	* Copyright (c) 1997-2014 ircd-hybrid development team
5	adx	30	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19			* USA
20			*/
21
22	michael	2916	/*! \file ircd.c
23			* \brief Starts up and runs the ircd.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	michael	3347	#include "user.h"
29	michael	1011	#include "list.h"
30	adx	30	#include "ircd.h"
31			#include "channel.h"
32			#include "client.h"
33			#include "event.h"
34			#include "fdlist.h"
35			#include "hash.h"
36			#include "irc_string.h"
37			#include "ircd_signal.h"
38	michael	3321	#include "gline.h"
39	adx	30	#include "motd.h"
40	michael	1632	#include "conf.h"
41	adx	30	#include "hostmask.h"
42			#include "parse.h"
43	michael	3322	#include "res.h"
44	adx	30	#include "restart.h"
45	michael	982	#include "rng_mt.h"
46	michael	3324	#include "auth.h"
47	adx	30	#include "s_bsd.h"
48	michael	1309	#include "log.h"
49	michael	3347	#include "server.h" /* try_connections */
50	adx	30	#include "send.h"
51			#include "whowas.h"
52			#include "modules.h"
53			#include "memory.h"
54	michael	1654	#include "mempool.h"
55	adx	30	#include "ircd_getopt.h"
56	michael	876	#include "watch.h"
57	michael	1622	#include "conf_db.h"
58	michael	1632	#include "conf_class.h"
59	adx	30
60	michael	1858
61			#ifdef HAVE_LIBGEOIP
62			GeoIP *geoip_ctx;
63			#endif
64	michael	2872
65	michael	896	struct ServerStatistics ServerStats;
66	adx	30	struct timeval SystemTime;
67			struct Client me; /* That's me */
68			struct LocalUser meLocalUser; /* That's also part of me */
69
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			: "foreground", ConfigFileEntry.dpath);
139			}
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	2916	{"configfile", &ConfigFileEntry.configfile,
165	adx	30	STRING, "File to use for ircd.conf"},
166	michael	1718	{"glinefile", &ConfigFileEntry.glinefile,
167			STRING, "File to use for gline database"},
168	michael	2916	{"klinefile", &ConfigFileEntry.klinefile,
169	michael	1718	STRING, "File to use for kline database"},
170			{"dlinefile", &ConfigFileEntry.dlinefile,
171			STRING, "File to use for dline database"},
172	michael	2916	{"xlinefile", &ConfigFileEntry.xlinefile,
173	michael	1718	STRING, "File to use for xline database"},
174			{"resvfile", &ConfigFileEntry.resvfile,
175			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			memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
264
265			GlobalSetOptions.autoconn = 1;
266			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
267			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
268
269			if (ConfigFileEntry.default_floodcount)
270			GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
271			else
272			GlobalSetOptions.floodcount = 10;
273
274			/* XXX I have no idea what to try here - Dianora */
275			GlobalSetOptions.joinfloodcount = 16;
276			GlobalSetOptions.joinfloodtime = 8;
277
278			split_servers = ConfigChannel.default_split_server_count;
279			split_users = ConfigChannel.default_split_user_count;
280
281			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
282			ConfigChannel.no_join_on_split))
283			{
284			splitmode = 1;
285			splitchecking = 1;
286			}
287
288			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
289			/* End of global set options */
290			}
291
292			/* initialize_server_capabs()
293			*
294			* inputs - none
295			* output - none
296			*/
297			static void
298			initialize_server_capabs(void)
299			{
300			add_capability("QS", CAP_QS, 1);
301			add_capability("EOB", CAP_EOB, 1);
302	michael	1117	add_capability("TS6", CAP_TS6, 0);
303	adx	30	add_capability("CLUSTER", CAP_CLUSTER, 1);
304	michael	1196	add_capability("SVS", CAP_SVS, 1);
305	michael	3267	add_capability("CHW", CAP_CHW, 1);
306	adx	30	add_capability("HOPS", CAP_HOPS, 1);
307			}
308
309			/* write_pidfile()
310			*
311			* inputs - filename+path of pid file
312			* output - NONE
313			* side effects - write the pid of the ircd to filename
314			*/
315			static void
316			write_pidfile(const char *filename)
317			{
318	michael	1325	FILE *fb;
319	adx	30
320	michael	1325	if ((fb = fopen(filename, "w")))
321	adx	30	{
322	michael	2691	char buff[IRCD_BUFSIZE];
323	adx	30	unsigned int pid = (unsigned int)getpid();
324
325	michael	1325	snprintf(buff, sizeof(buff), "%u\n", pid);
326
327			if ((fputs(buff, fb) == -1))
328	michael	1247	ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
329	adx	30	pid, filename, strerror(errno));
330
331	michael	1325	fclose(fb);
332	adx	30	}
333			else
334			{
335	michael	1247	ilog(LOG_TYPE_IRCD, "Error opening pid file %s", filename);
336	adx	30	}
337			}
338
339			/* check_pidfile()
340			*
341			* inputs - filename+path of pid file
342			* output - none
343			* side effects - reads pid from pidfile and checks if ircd is in process
344			* list. if it is, gracefully exits
345			* -kre
346			*/
347			static void
348			check_pidfile(const char *filename)
349			{
350	michael	1325	FILE *fb;
351	michael	2691	char buff[IRCD_BUFSIZE];
352	adx	30	pid_t pidfromfile;
353
354			/* Don't do logging here, since we don't have log() initialised */
355	michael	1325	if ((fb = fopen(filename, "r")))
356	adx	30	{
357	michael	1325	if (fgets(buff, 20, fb) == NULL)
358	adx	30	{
359			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
360			* strerror(errno));
361			*/
362			}
363			else
364			{
365			pidfromfile = atoi(buff);
366
367			if (!kill(pidfromfile, 0))
368			{
369			/* log(L_ERROR, "Server is already running"); */
370			printf("ircd: daemon is already running\n");
371			exit(-1);
372			}
373			}
374
375	michael	1325	fclose(fb);
376	adx	30	}
377			else if (errno != ENOENT)
378			{
379			/* log(L_ERROR, "Error opening pid file %s", filename); */
380			}
381			}
382
383			/* setup_corefile()
384			*
385			* inputs - nothing
386			* output - nothing
387			* side effects - setups corefile to system limits.
388			* -kre
389			*/
390			static void
391			setup_corefile(void)
392			{
393			#ifdef HAVE_SYS_RESOURCE_H
394			struct rlimit rlim; /* resource limits */
395
396			/* Set corefilesize to maximum */
397			if (!getrlimit(RLIMIT_CORE, &rlim))
398			{
399			rlim.rlim_cur = rlim.rlim_max;
400			setrlimit(RLIMIT_CORE, &rlim);
401			}
402			#endif
403			}
404
405	michael	2228	#ifdef HAVE_LIBCRYPTO
406			static int
407			always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
408			{
409			return 1;
410			}
411			#endif
412
413	adx	30	/* init_ssl()
414			*
415			* inputs - nothing
416			* output - nothing
417			* side effects - setups SSL context.
418			*/
419			static void
420	michael	1798	ssl_init(void)
421	adx	30	{
422			#ifdef HAVE_LIBCRYPTO
423	michael	2914	const unsigned char session_id[] = "ircd-hybrid";
424
425	adx	30	SSL_load_error_strings();
426			SSLeay_add_ssl_algorithms();
427
428	michael	967	if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
429	adx	30	{
430	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
431	adx	30
432	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
433	michael	1303	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
434	adx	30	}
435
436	michael	4162	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3);
437	michael	4161	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE);
438	michael	2228	SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
439			always_accept_verify_cb);
440	michael	2914	SSL_CTX_set_session_id_context(ServerInfo.server_ctx, session_id, sizeof(session_id) - 1);
441	adx	30
442	michael	4070	#if OPENSSL_VERSION_NUMBER >= 0x1000005FL && !defined(OPENSSL_NO_ECDH)
443			{
444			EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
445
446			if (key)
447			{
448			SSL_CTX_set_tmp_ecdh(ServerInfo.server_ctx, key);
449			EC_KEY_free(key);
450			}
451			}
452
453			SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
454			#endif
455
456	michael	1303	if ((ServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
457			{
458	michael	4129	const char *s = ERR_lib_error_string(ERR_get_error());
459	michael	1303
460	michael	4129	fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
461	michael	1303	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
462			}
463
464	michael	4162	SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3);
465	michael	4161	SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
466	michael	2253	SSL_CTX_set_verify(ServerInfo.client_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
467	michael	2228	always_accept_verify_cb);
468	adx	30	#endif /* HAVE_LIBCRYPTO */
469			}
470
471			int
472			main(int argc, char *argv[])
473			{
474	michael	2253	/* Check to see if the user is running us as root, which is a nono */
475	adx	30	if (geteuid() == 0)
476			{
477	michael	3525	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
478	michael	982	return -1;
479	adx	30	}
480
481			/* Setup corefile size immediately after boot -kre */
482			setup_corefile();
483
484			/* save server boot time right away, so getrusage works correctly */
485			set_time();
486
487	michael	982	/* It ain't random, but it ought to be a little harder to guess */
488			init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
489
490	adx	30	me.localClient = &meLocalUser;
491	michael	2253	dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
492	adx	30	of Client list */
493	michael	4080	ConfigLoggingEntry.use_logging = 1;
494	adx	30	ConfigFileEntry.dpath = DPATH;
495	michael	3239	ConfigFileEntry.spath = SPATH;
496			ConfigFileEntry.mpath = MPATH;
497	michael	1702	ConfigFileEntry.configfile = CPATH; /* Server configuration file */
498			ConfigFileEntry.klinefile = KPATH; /* Server kline file */
499	michael	1718	ConfigFileEntry.glinefile = GPATH; /* Server gline file */
500	michael	1702	ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
501			ConfigFileEntry.dlinefile = DLPATH; /* dline file */
502			ConfigFileEntry.resvfile = RESVPATH; /* resv file */
503
504	adx	30	myargv = argv;
505			umask(077); /* better safe than sorry --SRB */
506
507			parseargs(&argc, &argv, myopts);
508
509			if (printVersion)
510			{
511	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
512	adx	30	exit(EXIT_SUCCESS);
513			}
514
515			if (chdir(ConfigFileEntry.dpath))
516			{
517			perror("chdir");
518			exit(EXIT_FAILURE);
519			}
520
521	michael	1798	ssl_init();
522	adx	30
523			if (!server_state.foreground)
524			{
525			make_daemon();
526			close_standard_fds(); /* this needs to be before init_netio()! */
527			}
528			else
529			print_startup(getpid());
530
531			setup_signals();
532
533			/* We need this to initialise the fd array before anything else */
534			fdlist_init();
535	michael	1831	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
536	adx	30	check_can_use_v6();
537	michael	2632	init_netio(); /* This needs to be setup early ! -- adrian */
538	michael	2253
539	adx	30	/* Check if there is pidfile and daemon already running */
540			check_pidfile(pidFileName);
541
542	michael	1654	mp_pool_init();
543	adx	30	init_dlink_nodes();
544	michael	2159	init_isupport();
545	adx	30	dbuf_init();
546	michael	1798	hash_init();
547	adx	30	init_ip_hash_table(); /* client host ip hash table */
548			init_host_hash(); /* Host-hashtable. */
549	michael	1798	client_init();
550	michael	1632	class_init();
551	michael	1358	whowas_init();
552	michael	876	watch_init();
553	michael	1798	auth_init(); /* Initialise the auth code */
554	michael	998	init_resolver(); /* Needs to be setup before the io loop */
555	michael	1404	modules_init();
556	adx	30	read_conf_files(1); /* cold start init conf files */
557			init_uid();
558			initialize_server_capabs(); /* Set up default_server_capabs */
559			initialize_global_set_options();
560	michael	1798	channel_init();
561	michael	2216	read_links_file();
562	michael	2150	motd_init();
563	michael	1858	#ifdef HAVE_LIBGEOIP
564			geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
565			#endif
566	adx	30
567	michael	1115	if (EmptyString(ServerInfo.sid))
568	adx	30	{
569	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
570	adx	30	exit(EXIT_FAILURE);
571			}
572	michael	885
573	michael	1115	strlcpy(me.id, ServerInfo.sid, sizeof(me.id));
574
575			if (EmptyString(ServerInfo.name))
576			{
577	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
578	michael	1115	exit(EXIT_FAILURE);
579			}
580
581	adx	30	strlcpy(me.name, ServerInfo.name, sizeof(me.name));
582
583			/* serverinfo{} description must exist. If not, error out.*/
584	michael	1115	if (EmptyString(ServerInfo.description))
585	adx	30	{
586	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
587	adx	30	exit(EXIT_FAILURE);
588			}
589	michael	885
590	adx	30	strlcpy(me.info, ServerInfo.description, sizeof(me.info));
591
592	michael	1241	me.from = &me;
593			me.servptr = &me;
594			me.localClient->lasttime = CurrentTime;
595			me.localClient->since = CurrentTime;
596			me.localClient->firsttime = CurrentTime;
597	adx	30
598			SetMe(&me);
599			make_server(&me);
600
601	michael	1115	hash_add_id(&me);
602	adx	30	hash_add_client(&me);
603	michael	2916
604	adx	30	/* add ourselves to global_serv_list */
605			dlinkAdd(&me, make_dlink_node(), &global_serv_list);
606
607	michael	1622	load_kline_database();
608			load_dline_database();
609			load_gline_database();
610			load_xline_database();
611			load_resv_database();
612
613	adx	30	if (chdir(MODPATH))
614			{
615	michael	1247	ilog(LOG_TYPE_IRCD, "Could not load core modules. Terminating!");
616	adx	30	exit(EXIT_FAILURE);
617			}
618
619			load_all_modules(1);
620			load_conf_modules();
621			load_core_modules(1);
622	michael	1115
623	adx	30	/* Go back to DPATH after checking to see if we can chdir to MODPATH */
624	michael	1115	if (chdir(ConfigFileEntry.dpath))
625			{
626			perror("chdir");
627			exit(EXIT_FAILURE);
628			}
629	michael	1121
630	adx	30	/*
631			* assemble_umode_buffer() has to be called after
632			* reading conf/loading modules.
633			*/
634			assemble_umode_buffer();
635
636			write_pidfile(pidFileName);
637
638	michael	1247	ilog(LOG_TYPE_IRCD, "Server Ready");
639	adx	30
640	michael	4094	event_addish(&event_cleanup_glines, NULL);
641			event_addish(&event_cleanup_tklines, NULL);
642	adx	30
643			/* We want try_connections to be called as soon as possible now! -- adrian */
644			/* No, 'cause after a restart it would cause all sorts of nick collides */
645	michael	4094	event_addish(&event_try_connections, NULL);
646	adx	30
647			/* Setup the timeout check. I'll shift it later :) -- adrian */
648	michael	4094	event_addish(&event_comm_checktimeouts, NULL);
649	adx	30
650	michael	4094	event_addish(&event_save_all_databases, NULL);
651	michael	1625
652	adx	30	if (ConfigServerHide.links_delay > 0)
653	michael	4094	{
654			event_write_links_file.when = ConfigServerHide.links_delay;
655			event_addish(&event_write_links_file, NULL);
656			}
657	adx	30	else
658			ConfigServerHide.links_disabled = 1;
659
660			if (splitmode)
661	michael	4133	event_addish(&splitmode_event, NULL);
662	adx	30
663			io_loop();
664	michael	885	return 0;
665	adx	30	}