trunk/src/ircd.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  ircd.c: Starts up and runs the ircd.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  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
 *
 *  $Id$
 */

#include "stdinc.h"
#include "s_user.h"
#include "list.h"
#include "ircd.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "event.h"
#include "fdlist.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd_signal.h"
#include "s_gline.h"
#include "motd.h"
#include "hostmask.h"
#include "numeric.h"
#include "packet.h"
#include "parse.h"
#include "irc_res.h"
#include "restart.h"
#include "rng_mt.h"
#include "s_auth.h"
#include "s_bsd.h"
#include "conf.h"
#include "log.h"
#include "s_misc.h"
#include "s_serv.h"      /* try_connections */
#include "send.h"
#include "whowas.h"
#include "modules.h"
#include "memory.h"
#include "hook.h"
#include "ircd_getopt.h"
#include "balloc.h"
#include "motd.h"
#include "supported.h"
#include "watch.h"


/* /quote set variables */
struct SetOptions GlobalSetOptions;

/* configuration set from ircd.conf */
struct config_file_entry ConfigFileEntry; 
/* server info set from ircd.conf */
struct server_info ServerInfo;
/* admin info set from ircd.conf */
struct admin_info AdminInfo = { NULL, NULL, NULL };
struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
struct ServerState_t server_state = { 0 };
struct logging_entry ConfigLoggingEntry = { .use_logging = 1 };
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
 */
int default_server_capabs = 0;
unsigned int splitmode;
unsigned int splitchecking;
unsigned int split_users;
unsigned int split_servers;

/* Do klines the same way hybrid-6 did them, i.e. at the
 * top of the next io_loop instead of in the same loop as
 * the klines are being applied.
 *
 * This should fix strange CPU starvation as very indirectly reported.
 * (Why do you people not email bug reports? WHY? WHY?)
 *
 * - Dianora
 */

int rehashed_klines = 0;


/*
 * print_startup - print startup information
 */
static void
print_startup(int pid)
{
  printf("ircd: version %s\n", ircd_version);
  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[] = {
  {"dlinefile",  &ConfigFileEntry.dlinefile, 
   STRING, "File to use for dline.conf"},
  {"configfile", &ConfigFileEntry.configfile, 
   STRING, "File to use for ircd.conf"},
  {"klinefile",  &ConfigFileEntry.klinefile, 
   STRING, "File to use for kline.conf"},
  {"xlinefile",  &ConfigFileEntry.xlinefile, 
   STRING, "File to use for xline.conf"},
  {"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)
{
  static char to_send[200];
  struct timeval newtime;
  newtime.tv_sec  = 0;
  newtime.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,
                         "Clock Failure (%s), TS can be corrupted",
                         strerror(errno));
    restart("Clock Failure");
  }

  if (newtime.tv_sec < CurrentTime)
  {
    snprintf(to_send, sizeof(to_send),
             "System clock is running backwards - (%lu < %lu)",
             (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
    report_error(L_ALL, to_send, me.name, 0);
    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 == 1)
  {
    /*
     * Maybe we want a flags word?
     * ie. if (REHASHED_KLINES(global_flags)) 
     * SET_REHASHED_KLINES(global_flags)
     * CLEAR_REHASHED_KLINES(global_flags)
     *
     * - Dianora
     */
    if (rehashed_klines)
    {
      check_conf_klines();
      rehashed_klines = 0;
    }

    if (listing_client_list.head)
    {
      dlink_node *ptr = NULL, *ptr_next = NULL;
      DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
      {
        struct Client *client_p = ptr->data;
        assert(client_p->localClient->list_task);
        safe_list_channels(client_p, client_p->localClient->list_task, 0);
      }
    }

    /* Run pending events, then get the number of seconds to the next
     * event
     */
    while (eventNextTime() <= CurrentTime)
      eventRun();

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

    /* Check to see whether we have to rehash the configuration .. */
    if (dorehash)
    {
      rehash(1);
      dorehash = 0;
    }
    if (doremotd)
    {
      read_message_file(&ConfigFileEntry.motd);
      sendto_realops_flags(UMODE_ALL, L_ALL,
                           "Got signal SIGUSR1, reloading ircd motd file");
      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_message_files()
 *
 * inputs       - none
 * output       - none
 * side effects - Set up all message files needed, motd etc.
 */
static void
initialize_message_files(void)
{
  init_message_file(USER_MOTD, MPATH, &ConfigFileEntry.motd);
  init_message_file(OPER_MOTD, OPATH, &ConfigFileEntry.opermotd);
  init_message_file(USER_LINKS, LIPATH, &ConfigFileEntry.linksfile);

  read_message_file(&ConfigFileEntry.motd);
  read_message_file(&ConfigFileEntry.opermotd);
  read_message_file(&ConfigFileEntry.linksfile);

  init_isupport();
}

/* 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);
#ifdef HALFOPS
  add_capability("HOPS", CAP_HOPS, 1);
#endif
}

/* 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[32];
    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[32];
  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
}

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

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

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

  SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
  SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
  SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_NONE, NULL);

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

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

  SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
  SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
  SSL_CTX_set_verify(ServerInfo.client_ctx, SSL_VERIFY_NONE, NULL);
#endif /* HAVE_LIBCRYPTO */
}

/* init_callbacks()
 *
 * inputs       - nothing
 * output       - nothing
 * side effects - setups standard hook points
 */
static void
init_callbacks(void)
{
  iorecv_cb = register_callback("iorecv", iorecv_default);
  iosend_cb = register_callback("iosend", iosend_default);
}

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, "Don't run ircd as root!!!\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 */
  /* Initialise the channel capability usage counts... */
  init_chcap_usage_counts();

  ConfigFileEntry.dpath      = DPATH;
  ConfigFileEntry.configfile = CPATH;  /* Server configuration file */
  ConfigFileEntry.klinefile  = KPATH;  /* Server kline file         */
  ConfigFileEntry.xlinefile  = XPATH;  /* Server xline file         */
  ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file   */
  ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file   */
  ConfigFileEntry.dlinefile  = DLPATH; /* dline file                */
  ConfigFileEntry.glinefile  = GPATH;  /* gline log file            */
  ConfigFileEntry.cresvfile  = CRESVPATH; /* channel resv file      */
  ConfigFileEntry.nresvfile  = NRESVPATH; /* nick resv file         */
  myargv = argv;
  umask(077);                /* better safe than sorry --SRB */

  parseargs(&argc, &argv, myopts);

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

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

  init_ssl();

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

  setup_signals();

  /* Init the event subsystem */
  eventInit();
  /* We need this to initialise the fd array before anything else */
  fdlist_init();
  log_add_file(LOG_TYPE_IRCD, 0, logFileName);
  check_can_use_v6();
  init_comm();         /* This needs to be setup early ! -- adrian */
  /* Check if there is pidfile and daemon already running */
  check_pidfile(pidFileName);

  initBlockHeap();
  init_dlink_nodes();
  init_callbacks();
  initialize_message_files();
  dbuf_init();
  init_hash();
  init_ip_hash_table();      /* client host ip hash table */
  init_host_hash();          /* Host-hashtable. */
  init_client();
  init_class();
  whowas_init();
  watch_init();
  init_auth();          /* 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();
  init_channels();

  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);

  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");

  eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
  eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);

  /* 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 */
  eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);

  /* Setup the timeout check. I'll shift it later :)  -- adrian */
  eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);

  if (ConfigServerHide.links_delay > 0)
    eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
  else
    ConfigServerHide.links_disabled = 1;

  if (splitmode)
    eventAddIsh("check_splitmode", check_splitmode, NULL, 60);

  io_loop();
  return 0;
}
Revision:	1404
Committed:	Thu May 10 20:41:45 2012 UTC (11 years, 11 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/src/ircd.c*
File size:	17564 byte(s)
Log Message:	- minor cleanups to the module code
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* ircd.c: Starts up and runs the ircd.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26			#include "s_user.h"
27	michael	1011	#include "list.h"
28	adx	30	#include "ircd.h"
29			#include "channel.h"
30			#include "channel_mode.h"
31			#include "client.h"
32			#include "event.h"
33			#include "fdlist.h"
34			#include "hash.h"
35			#include "irc_string.h"
36			#include "ircd_signal.h"
37			#include "s_gline.h"
38			#include "motd.h"
39			#include "hostmask.h"
40			#include "numeric.h"
41			#include "packet.h"
42			#include "parse.h"
43			#include "irc_res.h"
44			#include "restart.h"
45	michael	982	#include "rng_mt.h"
46	adx	30	#include "s_auth.h"
47			#include "s_bsd.h"
48	michael	1309	#include "conf.h"
49			#include "log.h"
50	adx	30	#include "s_misc.h"
51			#include "s_serv.h" /* try_connections */
52			#include "send.h"
53			#include "whowas.h"
54			#include "modules.h"
55			#include "memory.h"
56			#include "hook.h"
57			#include "ircd_getopt.h"
58			#include "balloc.h"
59			#include "motd.h"
60			#include "supported.h"
61	michael	876	#include "watch.h"
62	adx	30
63
64			/* /quote set variables */
65			struct SetOptions GlobalSetOptions;
66
67			/* configuration set from ircd.conf */
68			struct config_file_entry ConfigFileEntry;
69			/* server info set from ircd.conf */
70			struct server_info ServerInfo;
71			/* admin info set from ircd.conf */
72			struct admin_info AdminInfo = { NULL, NULL, NULL };
73	michael	1145	struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
74	adx	30	struct ServerState_t server_state = { 0 };
75	michael	1324	struct logging_entry ConfigLoggingEntry = { .use_logging = 1 };
76	michael	896	struct ServerStatistics ServerStats;
77	adx	30	struct timeval SystemTime;
78			struct Client me; /* That's me */
79			struct LocalUser meLocalUser; /* That's also part of me */
80
81			const char *logFileName = LPATH;
82			const char *pidFileName = PPATH;
83
84			char **myargv;
85
86			int dorehash = 0;
87			int doremotd = 0;
88
89			/* Set to zero because it should be initialized later using
90			* initialize_server_capabs
91			*/
92			int default_server_capabs = 0;
93	michael	1013	unsigned int splitmode;
94			unsigned int splitchecking;
95			unsigned int split_users;
96	adx	30	unsigned int split_servers;
97
98			/* Do klines the same way hybrid-6 did them, i.e. at the
99			* top of the next io_loop instead of in the same loop as
100			* the klines are being applied.
101			*
102			* This should fix strange CPU starvation as very indirectly reported.
103			* (Why do you people not email bug reports? WHY? WHY?)
104			*
105			* - Dianora
106			*/
107
108			int rehashed_klines = 0;
109
110
111			/*
112			* print_startup - print startup information
113			*/
114			static void
115			print_startup(int pid)
116			{
117			printf("ircd: version %s\n", ircd_version);
118			printf("ircd: pid %d\n", pid);
119			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
120			: "foreground", ConfigFileEntry.dpath);
121			}
122
123			static void
124			make_daemon(void)
125			{
126			int pid;
127
128			if ((pid = fork()) < 0)
129			{
130			perror("fork");
131			exit(EXIT_FAILURE);
132			}
133			else if (pid > 0)
134			{
135			print_startup(pid);
136			exit(EXIT_SUCCESS);
137			}
138
139			setsid();
140			}
141
142			static int printVersion = 0;
143
144	michael	1357	static struct lgetopt myopts[] = {
145	adx	30	{"dlinefile", &ConfigFileEntry.dlinefile,
146			STRING, "File to use for dline.conf"},
147			{"configfile", &ConfigFileEntry.configfile,
148			STRING, "File to use for ircd.conf"},
149			{"klinefile", &ConfigFileEntry.klinefile,
150			STRING, "File to use for kline.conf"},
151			{"xlinefile", &ConfigFileEntry.xlinefile,
152			STRING, "File to use for xline.conf"},
153			{"logfile", &logFileName,
154			STRING, "File to use for ircd.log"},
155			{"pidfile", &pidFileName,
156			STRING, "File to use for process ID"},
157			{"foreground", &server_state.foreground,
158			YESNO, "Run in foreground (don't detach)"},
159			{"version", &printVersion,
160			YESNO, "Print version and exit"},
161			{"help", NULL, USAGE, "Print this text"},
162			{NULL, NULL, STRING, NULL},
163			};
164
165			void
166			set_time(void)
167			{
168			static char to_send[200];
169			struct timeval newtime;
170			newtime.tv_sec = 0;
171			newtime.tv_usec = 0;
172
173			if (gettimeofday(&newtime, NULL) == -1)
174			{
175	michael	1247	ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
176	adx	30	strerror(errno));
177			sendto_realops_flags(UMODE_ALL, L_ALL,
178			"Clock Failure (%s), TS can be corrupted",
179			strerror(errno));
180			restart("Clock Failure");
181			}
182
183			if (newtime.tv_sec < CurrentTime)
184			{
185	michael	1124	snprintf(to_send, sizeof(to_send),
186			"System clock is running backwards - (%lu < %lu)",
187			(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
188	adx	30	report_error(L_ALL, to_send, me.name, 0);
189			set_back_events(CurrentTime - newtime.tv_sec);
190			}
191
192			SystemTime.tv_sec = newtime.tv_sec;
193			SystemTime.tv_usec = newtime.tv_usec;
194			}
195
196			static void
197			io_loop(void)
198			{
199			while (1 == 1)
200			{
201			/*
202			* Maybe we want a flags word?
203			* ie. if (REHASHED_KLINES(global_flags))
204			* SET_REHASHED_KLINES(global_flags)
205			* CLEAR_REHASHED_KLINES(global_flags)
206			*
207			* - Dianora
208			*/
209			if (rehashed_klines)
210			{
211			check_conf_klines();
212			rehashed_klines = 0;
213			}
214
215			if (listing_client_list.head)
216			{
217			dlink_node ptr = NULL, ptr_next = NULL;
218			DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
219			{
220			struct Client *client_p = ptr->data;
221			assert(client_p->localClient->list_task);
222	michael	896	safe_list_channels(client_p, client_p->localClient->list_task, 0);
223	adx	30	}
224			}
225
226			/* Run pending events, then get the number of seconds to the next
227			* event
228			*/
229			while (eventNextTime() <= CurrentTime)
230			eventRun();
231
232			comm_select();
233			exit_aborted_clients();
234			free_exited_clients();
235			send_queued_all();
236
237			/* Check to see whether we have to rehash the configuration .. */
238			if (dorehash)
239			{
240			rehash(1);
241			dorehash = 0;
242			}
243			if (doremotd)
244			{
245			read_message_file(&ConfigFileEntry.motd);
246			sendto_realops_flags(UMODE_ALL, L_ALL,
247			"Got signal SIGUSR1, reloading ircd motd file");
248			doremotd = 0;
249			}
250			}
251			}
252
253			/* initalialize_global_set_options()
254			*
255			* inputs - none
256			* output - none
257			* side effects - This sets all global set options needed
258			*/
259			static void
260			initialize_global_set_options(void)
261			{
262			memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
263
264			GlobalSetOptions.autoconn = 1;
265			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
266			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
267
268			if (ConfigFileEntry.default_floodcount)
269			GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
270			else
271			GlobalSetOptions.floodcount = 10;
272
273			/* XXX I have no idea what to try here - Dianora */
274			GlobalSetOptions.joinfloodcount = 16;
275			GlobalSetOptions.joinfloodtime = 8;
276
277			split_servers = ConfigChannel.default_split_server_count;
278			split_users = ConfigChannel.default_split_user_count;
279
280			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
281			ConfigChannel.no_join_on_split))
282			{
283			splitmode = 1;
284			splitchecking = 1;
285			}
286
287			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
288			/* End of global set options */
289			}
290
291			/* initialize_message_files()
292			*
293			* inputs - none
294			* output - none
295			* side effects - Set up all message files needed, motd etc.
296			*/
297			static void
298			initialize_message_files(void)
299			{
300			init_message_file(USER_MOTD, MPATH, &ConfigFileEntry.motd);
301			init_message_file(OPER_MOTD, OPATH, &ConfigFileEntry.opermotd);
302			init_message_file(USER_LINKS, LIPATH, &ConfigFileEntry.linksfile);
303
304			read_message_file(&ConfigFileEntry.motd);
305			read_message_file(&ConfigFileEntry.opermotd);
306			read_message_file(&ConfigFileEntry.linksfile);
307
308			init_isupport();
309			}
310
311			/* initialize_server_capabs()
312			*
313			* inputs - none
314			* output - none
315			*/
316			static void
317			initialize_server_capabs(void)
318			{
319			add_capability("QS", CAP_QS, 1);
320			add_capability("EOB", CAP_EOB, 1);
321	michael	1117	add_capability("TS6", CAP_TS6, 0);
322	adx	30	add_capability("CLUSTER", CAP_CLUSTER, 1);
323	michael	1196	add_capability("SVS", CAP_SVS, 1);
324	adx	30	#ifdef HALFOPS
325			add_capability("HOPS", CAP_HOPS, 1);
326			#endif
327			}
328
329			/* write_pidfile()
330			*
331			* inputs - filename+path of pid file
332			* output - NONE
333			* side effects - write the pid of the ircd to filename
334			*/
335			static void
336			write_pidfile(const char *filename)
337			{
338	michael	1325	FILE *fb;
339	adx	30
340	michael	1325	if ((fb = fopen(filename, "w")))
341	adx	30	{
342			char buff[32];
343			unsigned int pid = (unsigned int)getpid();
344
345	michael	1325	snprintf(buff, sizeof(buff), "%u\n", pid);
346
347			if ((fputs(buff, fb) == -1))
348	michael	1247	ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
349	adx	30	pid, filename, strerror(errno));
350
351	michael	1325	fclose(fb);
352	adx	30	}
353			else
354			{
355	michael	1247	ilog(LOG_TYPE_IRCD, "Error opening pid file %s", filename);
356	adx	30	}
357			}
358
359			/* check_pidfile()
360			*
361			* inputs - filename+path of pid file
362			* output - none
363			* side effects - reads pid from pidfile and checks if ircd is in process
364			* list. if it is, gracefully exits
365			* -kre
366			*/
367			static void
368			check_pidfile(const char *filename)
369			{
370	michael	1325	FILE *fb;
371	adx	30	char buff[32];
372			pid_t pidfromfile;
373
374			/* Don't do logging here, since we don't have log() initialised */
375	michael	1325	if ((fb = fopen(filename, "r")))
376	adx	30	{
377	michael	1325	if (fgets(buff, 20, fb) == NULL)
378	adx	30	{
379			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
380			* strerror(errno));
381			*/
382			}
383			else
384			{
385			pidfromfile = atoi(buff);
386
387			if (!kill(pidfromfile, 0))
388			{
389			/* log(L_ERROR, "Server is already running"); */
390			printf("ircd: daemon is already running\n");
391			exit(-1);
392			}
393			}
394
395	michael	1325	fclose(fb);
396	adx	30	}
397			else if (errno != ENOENT)
398			{
399			/* log(L_ERROR, "Error opening pid file %s", filename); */
400			}
401			}
402
403			/* setup_corefile()
404			*
405			* inputs - nothing
406			* output - nothing
407			* side effects - setups corefile to system limits.
408			* -kre
409			*/
410			static void
411			setup_corefile(void)
412			{
413			#ifdef HAVE_SYS_RESOURCE_H
414			struct rlimit rlim; /* resource limits */
415
416			/* Set corefilesize to maximum */
417			if (!getrlimit(RLIMIT_CORE, &rlim))
418			{
419			rlim.rlim_cur = rlim.rlim_max;
420			setrlimit(RLIMIT_CORE, &rlim);
421			}
422			#endif
423			}
424
425			/* init_ssl()
426			*
427			* inputs - nothing
428			* output - nothing
429			* side effects - setups SSL context.
430			*/
431			static void
432			init_ssl(void)
433			{
434			#ifdef HAVE_LIBCRYPTO
435			SSL_load_error_strings();
436			SSLeay_add_ssl_algorithms();
437
438	michael	967	if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
439	adx	30	{
440			const char *s;
441
442	michael	1303	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n",
443	adx	30	s = ERR_lib_error_string(ERR_get_error()));
444	michael	1303	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
445	adx	30	}
446
447	michael	1316	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TLSv1);
448	michael	967	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
449			SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_NONE, NULL);
450	adx	30
451	michael	1303	if ((ServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
452			{
453			const char *s;
454
455			fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n",
456			s = ERR_lib_error_string(ERR_get_error()));
457			ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
458			}
459
460	michael	1316	SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TLSv1);
461	michael	1303	SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
462			SSL_CTX_set_verify(ServerInfo.client_ctx, SSL_VERIFY_NONE, NULL);
463	adx	30	#endif /* HAVE_LIBCRYPTO */
464			}
465
466			/* init_callbacks()
467			*
468			* inputs - nothing
469			* output - nothing
470			* side effects - setups standard hook points
471			*/
472			static void
473			init_callbacks(void)
474			{
475	adx	163	iorecv_cb = register_callback("iorecv", iorecv_default);
476			iosend_cb = register_callback("iosend", iosend_default);
477	adx	30	}
478
479			int
480			main(int argc, char *argv[])
481			{
482			/* Check to see if the user is running
483			* us as root, which is a nono
484			*/
485			if (geteuid() == 0)
486			{
487			fprintf(stderr, "Don't run ircd as root!!!\n");
488	michael	982	return -1;
489	adx	30	}
490
491			/* Setup corefile size immediately after boot -kre */
492			setup_corefile();
493
494			/* save server boot time right away, so getrusage works correctly */
495			set_time();
496
497	michael	982	/* It ain't random, but it ought to be a little harder to guess */
498			init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
499
500	adx	30	me.localClient = &meLocalUser;
501			dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
502			of Client list */
503			/* Initialise the channel capability usage counts... */
504			init_chcap_usage_counts();
505
506			ConfigFileEntry.dpath = DPATH;
507			ConfigFileEntry.configfile = CPATH; /* Server configuration file */
508			ConfigFileEntry.klinefile = KPATH; /* Server kline file */
509			ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
510			ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file */
511			ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file */
512			ConfigFileEntry.dlinefile = DLPATH; /* dline file */
513			ConfigFileEntry.glinefile = GPATH; /* gline log file */
514			ConfigFileEntry.cresvfile = CRESVPATH; /* channel resv file */
515			ConfigFileEntry.nresvfile = NRESVPATH; /* nick resv file */
516			myargv = argv;
517			umask(077); /* better safe than sorry --SRB */
518
519			parseargs(&argc, &argv, myopts);
520
521			if (printVersion)
522			{
523			printf("ircd: version %s\n", ircd_version);
524			exit(EXIT_SUCCESS);
525			}
526
527			if (chdir(ConfigFileEntry.dpath))
528			{
529			perror("chdir");
530			exit(EXIT_FAILURE);
531			}
532
533			init_ssl();
534
535			if (!server_state.foreground)
536			{
537			make_daemon();
538			close_standard_fds(); /* this needs to be before init_netio()! */
539			}
540			else
541			print_startup(getpid());
542
543			setup_signals();
544
545			/* Init the event subsystem */
546			eventInit();
547			/* We need this to initialise the fd array before anything else */
548			fdlist_init();
549	michael	1247	log_add_file(LOG_TYPE_IRCD, 0, logFileName);
550	adx	30	check_can_use_v6();
551			init_comm(); /* This needs to be setup early ! -- adrian */
552			/* Check if there is pidfile and daemon already running */
553			check_pidfile(pidFileName);
554
555			initBlockHeap();
556			init_dlink_nodes();
557			init_callbacks();
558			initialize_message_files();
559			dbuf_init();
560			init_hash();
561			init_ip_hash_table(); /* client host ip hash table */
562			init_host_hash(); /* Host-hashtable. */
563			init_client();
564			init_class();
565	michael	1358	whowas_init();
566	michael	876	watch_init();
567	michael	998	init_auth(); /* Initialise the auth code */
568			init_resolver(); /* Needs to be setup before the io loop */
569	michael	1404	modules_init();
570	adx	30	read_conf_files(1); /* cold start init conf files */
571			init_uid();
572			initialize_server_capabs(); /* Set up default_server_capabs */
573			initialize_global_set_options();
574			init_channels();
575
576	michael	1115	if (EmptyString(ServerInfo.sid))
577	adx	30	{
578	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
579	adx	30	exit(EXIT_FAILURE);
580			}
581	michael	885
582	michael	1115	strlcpy(me.id, ServerInfo.sid, sizeof(me.id));
583
584			if (EmptyString(ServerInfo.name))
585			{
586	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
587	michael	1115	exit(EXIT_FAILURE);
588			}
589
590	adx	30	strlcpy(me.name, ServerInfo.name, sizeof(me.name));
591
592			/* serverinfo{} description must exist. If not, error out.*/
593	michael	1115	if (EmptyString(ServerInfo.description))
594	adx	30	{
595	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
596	adx	30	exit(EXIT_FAILURE);
597			}
598	michael	885
599	adx	30	strlcpy(me.info, ServerInfo.description, sizeof(me.info));
600
601	michael	1241	me.from = &me;
602			me.servptr = &me;
603			me.localClient->lasttime = CurrentTime;
604			me.localClient->since = CurrentTime;
605			me.localClient->firsttime = CurrentTime;
606	adx	30
607			SetMe(&me);
608			make_server(&me);
609
610	michael	1115	hash_add_id(&me);
611	adx	30	hash_add_client(&me);
612
613			/* add ourselves to global_serv_list */
614			dlinkAdd(&me, make_dlink_node(), &global_serv_list);
615
616			if (chdir(MODPATH))
617			{
618	michael	1247	ilog(LOG_TYPE_IRCD, "Could not load core modules. Terminating!");
619	adx	30	exit(EXIT_FAILURE);
620			}
621
622			load_all_modules(1);
623			load_conf_modules();
624			load_core_modules(1);
625	michael	1115
626	adx	30	/* Go back to DPATH after checking to see if we can chdir to MODPATH */
627	michael	1115	if (chdir(ConfigFileEntry.dpath))
628			{
629			perror("chdir");
630			exit(EXIT_FAILURE);
631			}
632	michael	1121
633	adx	30	/*
634			* assemble_umode_buffer() has to be called after
635			* reading conf/loading modules.
636			*/
637			assemble_umode_buffer();
638
639			write_pidfile(pidFileName);
640
641	michael	1247	ilog(LOG_TYPE_IRCD, "Server Ready");
642	adx	30
643			eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
644			eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
645
646			/* We want try_connections to be called as soon as possible now! -- adrian */
647			/* No, 'cause after a restart it would cause all sorts of nick collides */
648			eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
649
650			/* Setup the timeout check. I'll shift it later :) -- adrian */
651			eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
652
653			if (ConfigServerHide.links_delay > 0)
654			eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
655			else
656			ConfigServerHide.links_disabled = 1;
657
658			if (splitmode)
659			eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
660
661			io_loop();
662	michael	885	return 0;
663	adx	30	}