8.2.x/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 "common.h"
#include "event.h"
#include "fdlist.h"
#include "hash.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd_signal.h"
#include "s_gline.h"
#include "motd.h"
#include "ircd_handler.h"
#include "msg.h"         /* msgtab */
#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 "s_conf.h"
#include "s_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"

/* Try and find the correct name to use with getrlimit() for setting the max.
 * number of files allowed to be open by this process.
 */

/* /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 };
struct ServerState_t server_state = { 0 };
struct logging_entry ConfigLoggingEntry = { 1, {0}, {0}, {0}, {0}, {0}, {0}, {0}, {0} }; 
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;
char ircd_platform[PLATFORMLEN];

int dorehash = 0;
int doremotd = 0;
time_t nextconnect = 1;       /* time for next try_connections call */

/* Set to zero because it should be initialized later using
 * initialize_server_capabs
 */
int default_server_capabs = 0;

#ifdef HAVE_LIBCRYPTO
int bio_spare_fd = -1;
#endif

int splitmode;
int splitchecking;
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;

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(L_ERROR, "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)
  {
    ircsprintf(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;
  GlobalSetOptions.idletime = ConfigFileEntry.idletime;
  /* 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);

  if (ServerInfo.sid != NULL)   /* only enable TS6 if we have an SID */
    add_capability("TS6", CAP_TS6, 0);

  add_capability("ZIP", CAP_ZIP, 0);
  add_capability("CLUSTER", CAP_CLUSTER, 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)
{
  FBFILE *fb;

  if ((fb = fbopen(filename, "w")))
  {
    char buff[32];
    unsigned int pid = (unsigned int)getpid();
    size_t nbytes = ircsprintf(buff, "%u\n", pid);

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

    fbclose(fb);
    return;
  }
  else
  {
    ilog(L_ERROR, "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)
{
  FBFILE *fb;
  char buff[32];
  pid_t pidfromfile;

  /* Don't do logging here, since we don't have log() initialised */
  if ((fb = fbopen(filename, "r")))
  {
    if (fbgets(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);
      }
    }

    fbclose(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 context -- %s\n",
            s = ERR_lib_error_string(ERR_get_error()));
    ilog(L_CRIT, "ERROR: Could not initialize the SSL context -- %s\n", s);
  }

  SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2);
  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);

  bio_spare_fd = save_spare_fd("SSL private key validation");
#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);
  iorecvctrl_cb = register_callback("iorecvctrl", NULL);
  iosendctrl_cb = register_callback("iosendctrl", NULL);
}

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)));

  memset(&me, 0, sizeof(me));
  memset(&meLocalUser, 0, sizeof(meLocalUser));
  me.localClient = &meLocalUser;
  dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
                                                   of Client list */

  memset(&ServerInfo, 0, sizeof(ServerInfo));
  memset(&ServerStats, 0, sizeof(ServerStats));

  /* 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();

  get_ircd_platform(ircd_platform);

  /* Init the event subsystem */
  eventInit();
  /* We need this to initialise the fd array before anything else */
  fdlist_init();
  init_log(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);

#ifndef NOBALLOC
  initBlockHeap();
#endif
  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. */
  clear_tree_parse();
  init_client();
  init_class();
  init_whowas();
  watch_init();
  init_auth();          /* Initialise the auth code */
  init_resolver();      /* Needs to be setup before the io loop */
  read_conf_files(1);   /* cold start init conf files */
  me.id[0] = '\0';
  init_uid();
  initialize_server_capabs();   /* Set up default_server_capabs */
  initialize_global_set_options();
  init_channels();

  if (ServerInfo.name == NULL)
  {
    ilog(L_CRIT, "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 (ServerInfo.description == NULL)
  {
    ilog(L_CRIT,
      "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;

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

  me.lasttime = me.since = me.firsttime = CurrentTime;
  hash_add_client(&me);
  
  /* add ourselves to global_serv_list */
  dlinkAdd(&me, make_dlink_node(), &global_serv_list);

  check_class();

#ifndef STATIC_MODULES
  if (chdir(MODPATH))
  {
    ilog (L_CRIT, "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 */
  chdir(ConfigFileEntry.dpath);
#else
  load_all_modules(1);
#endif
  /*
   * assemble_umode_buffer() has to be called after
   * reading conf/loading modules.
   */
  assemble_umode_buffer();

  write_pidfile(pidFileName);

  ilog(L_NOTICE, "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);

  eventAddIsh("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_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:	1011
Committed:	Fri Sep 18 10:14:09 2009 UTC (15 years, 11 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-7.2/src/ircd.c*
File size:	17593 byte(s)
Log Message:	- move list manipulation routines from tools.c to list.c - mem_frob() goes to memory.c - sort out redundant/unneeded header includes
#	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 "common.h"
33			#include "event.h"
34			#include "fdlist.h"
35			#include "hash.h"
36			#include "irc_string.h"
37			#include "sprintf_irc.h"
38			#include "ircd_signal.h"
39			#include "s_gline.h"
40			#include "motd.h"
41			#include "ircd_handler.h"
42			#include "msg.h" /* msgtab */
43			#include "hostmask.h"
44			#include "numeric.h"
45			#include "packet.h"
46			#include "parse.h"
47			#include "irc_res.h"
48			#include "restart.h"
49	michael	982	#include "rng_mt.h"
50	adx	30	#include "s_auth.h"
51			#include "s_bsd.h"
52			#include "s_conf.h"
53			#include "s_log.h"
54			#include "s_misc.h"
55			#include "s_serv.h" /* try_connections */
56			#include "send.h"
57			#include "whowas.h"
58			#include "modules.h"
59			#include "memory.h"
60			#include "hook.h"
61			#include "ircd_getopt.h"
62			#include "balloc.h"
63			#include "motd.h"
64			#include "supported.h"
65	michael	876	#include "watch.h"
66	adx	30
67			/* Try and find the correct name to use with getrlimit() for setting the max.
68			* number of files allowed to be open by this process.
69			*/
70
71			/* /quote set variables */
72			struct SetOptions GlobalSetOptions;
73
74			/* configuration set from ircd.conf */
75			struct config_file_entry ConfigFileEntry;
76			/* server info set from ircd.conf */
77			struct server_info ServerInfo;
78			/* admin info set from ircd.conf */
79			struct admin_info AdminInfo = { NULL, NULL, NULL };
80			struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0 };
81			struct ServerState_t server_state = { 0 };
82			struct logging_entry ConfigLoggingEntry = { 1, {0}, {0}, {0}, {0}, {0}, {0}, {0}, {0} };
83	michael	896	struct ServerStatistics ServerStats;
84	adx	30	struct timeval SystemTime;
85			struct Client me; /* That's me */
86			struct LocalUser meLocalUser; /* That's also part of me */
87
88			const char *logFileName = LPATH;
89			const char *pidFileName = PPATH;
90
91			char **myargv;
92			char ircd_platform[PLATFORMLEN];
93
94			int dorehash = 0;
95			int doremotd = 0;
96			time_t nextconnect = 1; /* time for next try_connections call */
97
98			/* Set to zero because it should be initialized later using
99			* initialize_server_capabs
100			*/
101			int default_server_capabs = 0;
102
103			#ifdef HAVE_LIBCRYPTO
104			int bio_spare_fd = -1;
105			#endif
106
107			int splitmode;
108			int splitchecking;
109			int split_users;
110			unsigned int split_servers;
111
112			/* Do klines the same way hybrid-6 did them, i.e. at the
113			* top of the next io_loop instead of in the same loop as
114			* the klines are being applied.
115			*
116			* This should fix strange CPU starvation as very indirectly reported.
117			* (Why do you people not email bug reports? WHY? WHY?)
118			*
119			* - Dianora
120			*/
121
122			int rehashed_klines = 0;
123
124
125			/*
126			* print_startup - print startup information
127			*/
128			static void
129			print_startup(int pid)
130			{
131			printf("ircd: version %s\n", ircd_version);
132			printf("ircd: pid %d\n", pid);
133			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
134			: "foreground", ConfigFileEntry.dpath);
135			}
136
137			static void
138			make_daemon(void)
139			{
140			int pid;
141
142			if ((pid = fork()) < 0)
143			{
144			perror("fork");
145			exit(EXIT_FAILURE);
146			}
147			else if (pid > 0)
148			{
149			print_startup(pid);
150			exit(EXIT_SUCCESS);
151			}
152
153			setsid();
154			}
155
156			static int printVersion = 0;
157
158			struct lgetopt myopts[] = {
159			{"dlinefile", &ConfigFileEntry.dlinefile,
160			STRING, "File to use for dline.conf"},
161			{"configfile", &ConfigFileEntry.configfile,
162			STRING, "File to use for ircd.conf"},
163			{"klinefile", &ConfigFileEntry.klinefile,
164			STRING, "File to use for kline.conf"},
165			{"xlinefile", &ConfigFileEntry.xlinefile,
166			STRING, "File to use for xline.conf"},
167			{"logfile", &logFileName,
168			STRING, "File to use for ircd.log"},
169			{"pidfile", &pidFileName,
170			STRING, "File to use for process ID"},
171			{"foreground", &server_state.foreground,
172			YESNO, "Run in foreground (don't detach)"},
173			{"version", &printVersion,
174			YESNO, "Print version and exit"},
175			{"help", NULL, USAGE, "Print this text"},
176			{NULL, NULL, STRING, NULL},
177			};
178
179			void
180			set_time(void)
181			{
182			static char to_send[200];
183			struct timeval newtime;
184			newtime.tv_sec = 0;
185			newtime.tv_usec = 0;
186
187			if (gettimeofday(&newtime, NULL) == -1)
188			{
189			ilog(L_ERROR, "Clock Failure (%s), TS can be corrupted",
190			strerror(errno));
191			sendto_realops_flags(UMODE_ALL, L_ALL,
192			"Clock Failure (%s), TS can be corrupted",
193			strerror(errno));
194			restart("Clock Failure");
195			}
196
197			if (newtime.tv_sec < CurrentTime)
198			{
199			ircsprintf(to_send, "System clock is running backwards - (%lu < %lu)",
200			(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
201			report_error(L_ALL, to_send, me.name, 0);
202			set_back_events(CurrentTime - newtime.tv_sec);
203			}
204
205			SystemTime.tv_sec = newtime.tv_sec;
206			SystemTime.tv_usec = newtime.tv_usec;
207			}
208
209			static void
210			io_loop(void)
211			{
212			while (1 == 1)
213			{
214			/*
215			* Maybe we want a flags word?
216			* ie. if (REHASHED_KLINES(global_flags))
217			* SET_REHASHED_KLINES(global_flags)
218			* CLEAR_REHASHED_KLINES(global_flags)
219			*
220			* - Dianora
221			*/
222			if (rehashed_klines)
223			{
224			check_conf_klines();
225			rehashed_klines = 0;
226			}
227
228			if (listing_client_list.head)
229			{
230			dlink_node ptr = NULL, ptr_next = NULL;
231			DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
232			{
233			struct Client *client_p = ptr->data;
234			assert(client_p->localClient->list_task);
235	michael	896	safe_list_channels(client_p, client_p->localClient->list_task, 0);
236	adx	30	}
237			}
238
239			/* Run pending events, then get the number of seconds to the next
240			* event
241			*/
242			while (eventNextTime() <= CurrentTime)
243			eventRun();
244
245			comm_select();
246			exit_aborted_clients();
247			free_exited_clients();
248			send_queued_all();
249
250			/* Check to see whether we have to rehash the configuration .. */
251			if (dorehash)
252			{
253			rehash(1);
254			dorehash = 0;
255			}
256			if (doremotd)
257			{
258			read_message_file(&ConfigFileEntry.motd);
259			sendto_realops_flags(UMODE_ALL, L_ALL,
260			"Got signal SIGUSR1, reloading ircd motd file");
261			doremotd = 0;
262			}
263			}
264			}
265
266			/* initalialize_global_set_options()
267			*
268			* inputs - none
269			* output - none
270			* side effects - This sets all global set options needed
271			*/
272			static void
273			initialize_global_set_options(void)
274			{
275			memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
276
277			GlobalSetOptions.autoconn = 1;
278			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
279			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
280
281			if (ConfigFileEntry.default_floodcount)
282			GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
283			else
284			GlobalSetOptions.floodcount = 10;
285
286			/* XXX I have no idea what to try here - Dianora */
287			GlobalSetOptions.joinfloodcount = 16;
288			GlobalSetOptions.joinfloodtime = 8;
289
290			split_servers = ConfigChannel.default_split_server_count;
291			split_users = ConfigChannel.default_split_user_count;
292
293			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
294			ConfigChannel.no_join_on_split))
295			{
296			splitmode = 1;
297			splitchecking = 1;
298			}
299
300			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
301			GlobalSetOptions.idletime = ConfigFileEntry.idletime;
302			/* End of global set options */
303			}
304
305			/* initialize_message_files()
306			*
307			* inputs - none
308			* output - none
309			* side effects - Set up all message files needed, motd etc.
310			*/
311			static void
312			initialize_message_files(void)
313			{
314			init_message_file(USER_MOTD, MPATH, &ConfigFileEntry.motd);
315			init_message_file(OPER_MOTD, OPATH, &ConfigFileEntry.opermotd);
316			init_message_file(USER_LINKS, LIPATH, &ConfigFileEntry.linksfile);
317
318			read_message_file(&ConfigFileEntry.motd);
319			read_message_file(&ConfigFileEntry.opermotd);
320			read_message_file(&ConfigFileEntry.linksfile);
321
322			init_isupport();
323			}
324
325			/* initialize_server_capabs()
326			*
327			* inputs - none
328			* output - none
329			*/
330			static void
331			initialize_server_capabs(void)
332			{
333			add_capability("QS", CAP_QS, 1);
334			add_capability("EOB", CAP_EOB, 1);
335	michael	885
336	adx	30	if (ServerInfo.sid != NULL) /* only enable TS6 if we have an SID */
337			add_capability("TS6", CAP_TS6, 0);
338	michael	885
339	adx	30	add_capability("ZIP", CAP_ZIP, 0);
340			add_capability("CLUSTER", CAP_CLUSTER, 1);
341			#ifdef HALFOPS
342			add_capability("HOPS", CAP_HOPS, 1);
343			#endif
344			}
345
346			/* write_pidfile()
347			*
348			* inputs - filename+path of pid file
349			* output - NONE
350			* side effects - write the pid of the ircd to filename
351			*/
352			static void
353			write_pidfile(const char *filename)
354			{
355			FBFILE *fb;
356
357			if ((fb = fbopen(filename, "w")))
358			{
359			char buff[32];
360			unsigned int pid = (unsigned int)getpid();
361			size_t nbytes = ircsprintf(buff, "%u\n", pid);
362
363			if ((fbputs(buff, fb, nbytes) == -1))
364			ilog(L_ERROR, "Error writing %u to pid file %s (%s)",
365			pid, filename, strerror(errno));
366
367			fbclose(fb);
368			return;
369			}
370			else
371			{
372			ilog(L_ERROR, "Error opening pid file %s", filename);
373			}
374			}
375
376			/* check_pidfile()
377			*
378			* inputs - filename+path of pid file
379			* output - none
380			* side effects - reads pid from pidfile and checks if ircd is in process
381			* list. if it is, gracefully exits
382			* -kre
383			*/
384			static void
385			check_pidfile(const char *filename)
386			{
387			FBFILE *fb;
388			char buff[32];
389			pid_t pidfromfile;
390
391			/* Don't do logging here, since we don't have log() initialised */
392			if ((fb = fbopen(filename, "r")))
393			{
394			if (fbgets(buff, 20, fb) == NULL)
395			{
396			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
397			* strerror(errno));
398			*/
399			}
400			else
401			{
402			pidfromfile = atoi(buff);
403
404			if (!kill(pidfromfile, 0))
405			{
406			/* log(L_ERROR, "Server is already running"); */
407			printf("ircd: daemon is already running\n");
408			exit(-1);
409			}
410			}
411
412			fbclose(fb);
413			}
414			else if (errno != ENOENT)
415			{
416			/* log(L_ERROR, "Error opening pid file %s", filename); */
417			}
418			}
419
420			/* setup_corefile()
421			*
422			* inputs - nothing
423			* output - nothing
424			* side effects - setups corefile to system limits.
425			* -kre
426			*/
427			static void
428			setup_corefile(void)
429			{
430			#ifdef HAVE_SYS_RESOURCE_H
431			struct rlimit rlim; /* resource limits */
432
433			/* Set corefilesize to maximum */
434			if (!getrlimit(RLIMIT_CORE, &rlim))
435			{
436			rlim.rlim_cur = rlim.rlim_max;
437			setrlimit(RLIMIT_CORE, &rlim);
438			}
439			#endif
440			}
441
442			/* init_ssl()
443			*
444			* inputs - nothing
445			* output - nothing
446			* side effects - setups SSL context.
447			*/
448			static void
449			init_ssl(void)
450			{
451			#ifdef HAVE_LIBCRYPTO
452			SSL_load_error_strings();
453			SSLeay_add_ssl_algorithms();
454
455	michael	967	if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
456	adx	30	{
457			const char *s;
458
459			fprintf(stderr, "ERROR: Could not initialize the SSL context -- %s\n",
460			s = ERR_lib_error_string(ERR_get_error()));
461			ilog(L_CRIT, "ERROR: Could not initialize the SSL context -- %s\n", s);
462			}
463
464	michael	967	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2);
465			SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
466			SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_NONE, NULL);
467	adx	30
468			bio_spare_fd = save_spare_fd("SSL private key validation");
469			#endif /* HAVE_LIBCRYPTO */
470			}
471
472			/* init_callbacks()
473			*
474			* inputs - nothing
475			* output - nothing
476			* side effects - setups standard hook points
477			*/
478			static void
479			init_callbacks(void)
480			{
481	adx	163	iorecv_cb = register_callback("iorecv", iorecv_default);
482			iosend_cb = register_callback("iosend", iosend_default);
483	adx	30	iorecvctrl_cb = register_callback("iorecvctrl", NULL);
484			iosendctrl_cb = register_callback("iosendctrl", NULL);
485			}
486
487			int
488			main(int argc, char *argv[])
489			{
490			/* Check to see if the user is running
491			* us as root, which is a nono
492			*/
493			if (geteuid() == 0)
494			{
495			fprintf(stderr, "Don't run ircd as root!!!\n");
496	michael	982	return -1;
497	adx	30	}
498
499			/* Setup corefile size immediately after boot -kre */
500			setup_corefile();
501
502			/* save server boot time right away, so getrusage works correctly */
503			set_time();
504
505	michael	982	/* It ain't random, but it ought to be a little harder to guess */
506			init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
507
508	adx	30	memset(&me, 0, sizeof(me));
509			memset(&meLocalUser, 0, sizeof(meLocalUser));
510			me.localClient = &meLocalUser;
511			dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
512			of Client list */
513
514			memset(&ServerInfo, 0, sizeof(ServerInfo));
515	michael	896	memset(&ServerStats, 0, sizeof(ServerStats));
516	adx	30
517			/* Initialise the channel capability usage counts... */
518			init_chcap_usage_counts();
519
520			ConfigFileEntry.dpath = DPATH;
521			ConfigFileEntry.configfile = CPATH; /* Server configuration file */
522			ConfigFileEntry.klinefile = KPATH; /* Server kline file */
523			ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
524			ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file */
525			ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file */
526			ConfigFileEntry.dlinefile = DLPATH; /* dline file */
527			ConfigFileEntry.glinefile = GPATH; /* gline log file */
528			ConfigFileEntry.cresvfile = CRESVPATH; /* channel resv file */
529			ConfigFileEntry.nresvfile = NRESVPATH; /* nick resv file */
530			myargv = argv;
531			umask(077); /* better safe than sorry --SRB */
532
533			parseargs(&argc, &argv, myopts);
534
535			if (printVersion)
536			{
537			printf("ircd: version %s\n", ircd_version);
538			exit(EXIT_SUCCESS);
539			}
540
541			if (chdir(ConfigFileEntry.dpath))
542			{
543			perror("chdir");
544			exit(EXIT_FAILURE);
545			}
546
547			init_ssl();
548
549			if (!server_state.foreground)
550			{
551			make_daemon();
552			close_standard_fds(); /* this needs to be before init_netio()! */
553			}
554			else
555			print_startup(getpid());
556
557			setup_signals();
558
559			get_ircd_platform(ircd_platform);
560
561			/* Init the event subsystem */
562			eventInit();
563			/* We need this to initialise the fd array before anything else */
564			fdlist_init();
565			init_log(logFileName);
566			check_can_use_v6();
567			init_comm(); /* This needs to be setup early ! -- adrian */
568			/* Check if there is pidfile and daemon already running */
569			check_pidfile(pidFileName);
570
571			#ifndef NOBALLOC
572			initBlockHeap();
573			#endif
574			init_dlink_nodes();
575			init_callbacks();
576			initialize_message_files();
577			dbuf_init();
578			init_hash();
579			init_ip_hash_table(); /* client host ip hash table */
580			init_host_hash(); /* Host-hashtable. */
581			clear_tree_parse();
582			init_client();
583			init_class();
584			init_whowas();
585	michael	876	watch_init();
586	michael	998	init_auth(); /* Initialise the auth code */
587			init_resolver(); /* Needs to be setup before the io loop */
588	adx	30	read_conf_files(1); /* cold start init conf files */
589			me.id[0] = '\0';
590			init_uid();
591			initialize_server_capabs(); /* Set up default_server_capabs */
592			initialize_global_set_options();
593			init_channels();
594
595			if (ServerInfo.name == NULL)
596			{
597			ilog(L_CRIT, "No server name specified in serverinfo block.");
598			exit(EXIT_FAILURE);
599			}
600	michael	885
601	adx	30	strlcpy(me.name, ServerInfo.name, sizeof(me.name));
602
603			/* serverinfo{} description must exist. If not, error out.*/
604			if (ServerInfo.description == NULL)
605			{
606			ilog(L_CRIT,
607			"ERROR: No server description specified in serverinfo block.");
608			exit(EXIT_FAILURE);
609			}
610	michael	885
611	adx	30	strlcpy(me.info, ServerInfo.description, sizeof(me.info));
612
613			me.from = &me;
614			me.servptr = &me;
615
616			SetMe(&me);
617			make_server(&me);
618
619			me.lasttime = me.since = me.firsttime = CurrentTime;
620			hash_add_client(&me);
621
622			/* add ourselves to global_serv_list */
623			dlinkAdd(&me, make_dlink_node(), &global_serv_list);
624
625			check_class();
626
627			#ifndef STATIC_MODULES
628			if (chdir(MODPATH))
629			{
630			ilog (L_CRIT, "Could not load core modules. Terminating!");
631			exit(EXIT_FAILURE);
632			}
633
634			load_all_modules(1);
635			load_conf_modules();
636			load_core_modules(1);
637			/* Go back to DPATH after checking to see if we can chdir to MODPATH */
638			chdir(ConfigFileEntry.dpath);
639			#else
640			load_all_modules(1);
641			#endif
642			/*
643			* assemble_umode_buffer() has to be called after
644			* reading conf/loading modules.
645			*/
646			assemble_umode_buffer();
647
648			write_pidfile(pidFileName);
649
650			ilog(L_NOTICE, "Server Ready");
651
652			eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
653			eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
654
655			/* We want try_connections to be called as soon as possible now! -- adrian */
656			/* No, 'cause after a restart it would cause all sorts of nick collides */
657			eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
658
659			eventAddIsh("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
660
661			/* Setup the timeout check. I'll shift it later :) -- adrian */
662			eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
663
664			if (ConfigServerHide.links_delay > 0)
665			eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
666			else
667			ConfigServerHide.links_disabled = 1;
668
669			if (splitmode)
670			eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
671
672			io_loop();
673	michael	885	return 0;
674	adx	30	}