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 "common.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 "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, 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;

/* 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

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;

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)
  {
    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("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 = snprintf(buff, sizeof(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)));

  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();

  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);

  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. */
  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 */
  init_uid();
  initialize_server_capabs();   /* Set up default_server_capabs */
  initialize_global_set_options();
  init_channels();

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

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

  if (EmptyString(ServerInfo.name))
  {
    ilog(L_CRIT, "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(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;
  me.lasttime = me.since = me.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(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 */
  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(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:	1176
Committed:	Sun Aug 14 11:24:24 2011 UTC (14 years ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/src/ircd.c*
File size:	17425 byte(s)
Log Message:	- remove idle-time klines - rename LocalUser.last to LocalUser.last_privmsg - m_message.c: reset source_p->last_privmsg even if a client is messaging itself
#	Content
1	/*
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	* $Id$
23	*/
24
25	#include "stdinc.h"
26	#include "s_user.h"
27	#include "list.h"
28	#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 "ircd_signal.h"
38	#include "s_gline.h"
39	#include "motd.h"
40	#include "ircd_handler.h"
41	#include "msg.h" /* msgtab */
42	#include "hostmask.h"
43	#include "numeric.h"
44	#include "packet.h"
45	#include "parse.h"
46	#include "irc_res.h"
47	#include "restart.h"
48	#include "rng_mt.h"
49	#include "s_auth.h"
50	#include "s_bsd.h"
51	#include "s_conf.h"
52	#include "s_log.h"
53	#include "s_misc.h"
54	#include "s_serv.h" /* try_connections */
55	#include "send.h"
56	#include "whowas.h"
57	#include "modules.h"
58	#include "memory.h"
59	#include "hook.h"
60	#include "ircd_getopt.h"
61	#include "balloc.h"
62	#include "motd.h"
63	#include "supported.h"
64	#include "watch.h"
65
66	/* Try and find the correct name to use with getrlimit() for setting the max.
67	* number of files allowed to be open by this process.
68	*/
69
70	/* /quote set variables */
71	struct SetOptions GlobalSetOptions;
72
73	/* configuration set from ircd.conf */
74	struct config_file_entry ConfigFileEntry;
75	/* server info set from ircd.conf */
76	struct server_info ServerInfo;
77	/* admin info set from ircd.conf */
78	struct admin_info AdminInfo = { NULL, NULL, NULL };
79	struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
80	struct ServerState_t server_state = { 0 };
81	struct logging_entry ConfigLoggingEntry = { 1, {0}, {0}, {0}, {0}, {0}, {0}, {0}, {0} };
82	struct ServerStatistics ServerStats;
83	struct timeval SystemTime;
84	struct Client me; /* That's me */
85	struct LocalUser meLocalUser; /* That's also part of me */
86
87	const char *logFileName = LPATH;
88	const char *pidFileName = PPATH;
89
90	char **myargv;
91	char ircd_platform[PLATFORMLEN];
92
93	int dorehash = 0;
94	int doremotd = 0;
95
96	/* Set to zero because it should be initialized later using
97	* initialize_server_capabs
98	*/
99	int default_server_capabs = 0;
100
101	#ifdef HAVE_LIBCRYPTO
102	int bio_spare_fd = -1;
103	#endif
104
105	unsigned int splitmode;
106	unsigned int splitchecking;
107	unsigned int split_users;
108	unsigned int split_servers;
109
110	/* Do klines the same way hybrid-6 did them, i.e. at the
111	* top of the next io_loop instead of in the same loop as
112	* the klines are being applied.
113	*
114	* This should fix strange CPU starvation as very indirectly reported.
115	* (Why do you people not email bug reports? WHY? WHY?)
116	*
117	* - Dianora
118	*/
119
120	int rehashed_klines = 0;
121
122
123	/*
124	* print_startup - print startup information
125	*/
126	static void
127	print_startup(int pid)
128	{
129	printf("ircd: version %s\n", ircd_version);
130	printf("ircd: pid %d\n", pid);
131	printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
132	: "foreground", ConfigFileEntry.dpath);
133	}
134
135	static void
136	make_daemon(void)
137	{
138	int pid;
139
140	if ((pid = fork()) < 0)
141	{
142	perror("fork");
143	exit(EXIT_FAILURE);
144	}
145	else if (pid > 0)
146	{
147	print_startup(pid);
148	exit(EXIT_SUCCESS);
149	}
150
151	setsid();
152	}
153
154	static int printVersion = 0;
155
156	struct lgetopt myopts[] = {
157	{"dlinefile", &ConfigFileEntry.dlinefile,
158	STRING, "File to use for dline.conf"},
159	{"configfile", &ConfigFileEntry.configfile,
160	STRING, "File to use for ircd.conf"},
161	{"klinefile", &ConfigFileEntry.klinefile,
162	STRING, "File to use for kline.conf"},
163	{"xlinefile", &ConfigFileEntry.xlinefile,
164	STRING, "File to use for xline.conf"},
165	{"logfile", &logFileName,
166	STRING, "File to use for ircd.log"},
167	{"pidfile", &pidFileName,
168	STRING, "File to use for process ID"},
169	{"foreground", &server_state.foreground,
170	YESNO, "Run in foreground (don't detach)"},
171	{"version", &printVersion,
172	YESNO, "Print version and exit"},
173	{"help", NULL, USAGE, "Print this text"},
174	{NULL, NULL, STRING, NULL},
175	};
176
177	void
178	set_time(void)
179	{
180	static char to_send[200];
181	struct timeval newtime;
182	newtime.tv_sec = 0;
183	newtime.tv_usec = 0;
184
185	if (gettimeofday(&newtime, NULL) == -1)
186	{
187	ilog(L_ERROR, "Clock Failure (%s), TS can be corrupted",
188	strerror(errno));
189	sendto_realops_flags(UMODE_ALL, L_ALL,
190	"Clock Failure (%s), TS can be corrupted",
191	strerror(errno));
192	restart("Clock Failure");
193	}
194
195	if (newtime.tv_sec < CurrentTime)
196	{
197	snprintf(to_send, sizeof(to_send),
198	"System clock is running backwards - (%lu < %lu)",
199	(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
200	report_error(L_ALL, to_send, me.name, 0);
201	set_back_events(CurrentTime - newtime.tv_sec);
202	}
203
204	SystemTime.tv_sec = newtime.tv_sec;
205	SystemTime.tv_usec = newtime.tv_usec;
206	}
207
208	static void
209	io_loop(void)
210	{
211	while (1 == 1)
212	{
213	/*
214	* Maybe we want a flags word?
215	* ie. if (REHASHED_KLINES(global_flags))
216	* SET_REHASHED_KLINES(global_flags)
217	* CLEAR_REHASHED_KLINES(global_flags)
218	*
219	* - Dianora
220	*/
221	if (rehashed_klines)
222	{
223	check_conf_klines();
224	rehashed_klines = 0;
225	}
226
227	if (listing_client_list.head)
228	{
229	dlink_node ptr = NULL, ptr_next = NULL;
230	DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
231	{
232	struct Client *client_p = ptr->data;
233	assert(client_p->localClient->list_task);
234	safe_list_channels(client_p, client_p->localClient->list_task, 0);
235	}
236	}
237
238	/* Run pending events, then get the number of seconds to the next
239	* event
240	*/
241	while (eventNextTime() <= CurrentTime)
242	eventRun();
243
244	comm_select();
245	exit_aborted_clients();
246	free_exited_clients();
247	send_queued_all();
248
249	/* Check to see whether we have to rehash the configuration .. */
250	if (dorehash)
251	{
252	rehash(1);
253	dorehash = 0;
254	}
255	if (doremotd)
256	{
257	read_message_file(&ConfigFileEntry.motd);
258	sendto_realops_flags(UMODE_ALL, L_ALL,
259	"Got signal SIGUSR1, reloading ircd motd file");
260	doremotd = 0;
261	}
262	}
263	}
264
265	/* initalialize_global_set_options()
266	*
267	* inputs - none
268	* output - none
269	* side effects - This sets all global set options needed
270	*/
271	static void
272	initialize_global_set_options(void)
273	{
274	memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
275
276	GlobalSetOptions.autoconn = 1;
277	GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
278	GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
279
280	if (ConfigFileEntry.default_floodcount)
281	GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
282	else
283	GlobalSetOptions.floodcount = 10;
284
285	/* XXX I have no idea what to try here - Dianora */
286	GlobalSetOptions.joinfloodcount = 16;
287	GlobalSetOptions.joinfloodtime = 8;
288
289	split_servers = ConfigChannel.default_split_server_count;
290	split_users = ConfigChannel.default_split_user_count;
291
292	if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
293	ConfigChannel.no_join_on_split))
294	{
295	splitmode = 1;
296	splitchecking = 1;
297	}
298
299	GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
300	/* End of global set options */
301	}
302
303	/* initialize_message_files()
304	*
305	* inputs - none
306	* output - none
307	* side effects - Set up all message files needed, motd etc.
308	*/
309	static void
310	initialize_message_files(void)
311	{
312	init_message_file(USER_MOTD, MPATH, &ConfigFileEntry.motd);
313	init_message_file(OPER_MOTD, OPATH, &ConfigFileEntry.opermotd);
314	init_message_file(USER_LINKS, LIPATH, &ConfigFileEntry.linksfile);
315
316	read_message_file(&ConfigFileEntry.motd);
317	read_message_file(&ConfigFileEntry.opermotd);
318	read_message_file(&ConfigFileEntry.linksfile);
319
320	init_isupport();
321	}
322
323	/* initialize_server_capabs()
324	*
325	* inputs - none
326	* output - none
327	*/
328	static void
329	initialize_server_capabs(void)
330	{
331	add_capability("QS", CAP_QS, 1);
332	add_capability("EOB", CAP_EOB, 1);
333	add_capability("TS6", CAP_TS6, 0);
334	add_capability("ZIP", CAP_ZIP, 0);
335	add_capability("CLUSTER", CAP_CLUSTER, 1);
336	#ifdef HALFOPS
337	add_capability("HOPS", CAP_HOPS, 1);
338	#endif
339	}
340
341	/* write_pidfile()
342	*
343	* inputs - filename+path of pid file
344	* output - NONE
345	* side effects - write the pid of the ircd to filename
346	*/
347	static void
348	write_pidfile(const char *filename)
349	{
350	FBFILE *fb;
351
352	if ((fb = fbopen(filename, "w")))
353	{
354	char buff[32];
355	unsigned int pid = (unsigned int)getpid();
356	size_t nbytes = snprintf(buff, sizeof(buff), "%u\n", pid);
357
358	if ((fbputs(buff, fb, nbytes) == -1))
359	ilog(L_ERROR, "Error writing %u to pid file %s (%s)",
360	pid, filename, strerror(errno));
361
362	fbclose(fb);
363	return;
364	}
365	else
366	{
367	ilog(L_ERROR, "Error opening pid file %s", filename);
368	}
369	}
370
371	/* check_pidfile()
372	*
373	* inputs - filename+path of pid file
374	* output - none
375	* side effects - reads pid from pidfile and checks if ircd is in process
376	* list. if it is, gracefully exits
377	* -kre
378	*/
379	static void
380	check_pidfile(const char *filename)
381	{
382	FBFILE *fb;
383	char buff[32];
384	pid_t pidfromfile;
385
386	/* Don't do logging here, since we don't have log() initialised */
387	if ((fb = fbopen(filename, "r")))
388	{
389	if (fbgets(buff, 20, fb) == NULL)
390	{
391	/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
392	* strerror(errno));
393	*/
394	}
395	else
396	{
397	pidfromfile = atoi(buff);
398
399	if (!kill(pidfromfile, 0))
400	{
401	/* log(L_ERROR, "Server is already running"); */
402	printf("ircd: daemon is already running\n");
403	exit(-1);
404	}
405	}
406
407	fbclose(fb);
408	}
409	else if (errno != ENOENT)
410	{
411	/* log(L_ERROR, "Error opening pid file %s", filename); */
412	}
413	}
414
415	/* setup_corefile()
416	*
417	* inputs - nothing
418	* output - nothing
419	* side effects - setups corefile to system limits.
420	* -kre
421	*/
422	static void
423	setup_corefile(void)
424	{
425	#ifdef HAVE_SYS_RESOURCE_H
426	struct rlimit rlim; /* resource limits */
427
428	/* Set corefilesize to maximum */
429	if (!getrlimit(RLIMIT_CORE, &rlim))
430	{
431	rlim.rlim_cur = rlim.rlim_max;
432	setrlimit(RLIMIT_CORE, &rlim);
433	}
434	#endif
435	}
436
437	/* init_ssl()
438	*
439	* inputs - nothing
440	* output - nothing
441	* side effects - setups SSL context.
442	*/
443	static void
444	init_ssl(void)
445	{
446	#ifdef HAVE_LIBCRYPTO
447	SSL_load_error_strings();
448	SSLeay_add_ssl_algorithms();
449
450	if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
451	{
452	const char *s;
453
454	fprintf(stderr, "ERROR: Could not initialize the SSL context -- %s\n",
455	s = ERR_lib_error_string(ERR_get_error()));
456	ilog(L_CRIT, "ERROR: Could not initialize the SSL context -- %s\n", s);
457	}
458
459	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2);
460	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
461	SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_NONE, NULL);
462
463	bio_spare_fd = save_spare_fd("SSL private key validation");
464	#endif /* HAVE_LIBCRYPTO */
465	}
466
467	/* init_callbacks()
468	*
469	* inputs - nothing
470	* output - nothing
471	* side effects - setups standard hook points
472	*/
473	static void
474	init_callbacks(void)
475	{
476	iorecv_cb = register_callback("iorecv", iorecv_default);
477	iosend_cb = register_callback("iosend", iosend_default);
478	iorecvctrl_cb = register_callback("iorecvctrl", NULL);
479	iosendctrl_cb = register_callback("iosendctrl", NULL);
480	}
481
482	int
483	main(int argc, char *argv[])
484	{
485	/* Check to see if the user is running
486	* us as root, which is a nono
487	*/
488	if (geteuid() == 0)
489	{
490	fprintf(stderr, "Don't run ircd as root!!!\n");
491	return -1;
492	}
493
494	/* Setup corefile size immediately after boot -kre */
495	setup_corefile();
496
497	/* save server boot time right away, so getrusage works correctly */
498	set_time();
499
500	/* It ain't random, but it ought to be a little harder to guess */
501	init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
502
503	me.localClient = &meLocalUser;
504	dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
505	of Client list */
506	/* Initialise the channel capability usage counts... */
507	init_chcap_usage_counts();
508
509	ConfigFileEntry.dpath = DPATH;
510	ConfigFileEntry.configfile = CPATH; /* Server configuration file */
511	ConfigFileEntry.klinefile = KPATH; /* Server kline file */
512	ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
513	ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file */
514	ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file */
515	ConfigFileEntry.dlinefile = DLPATH; /* dline file */
516	ConfigFileEntry.glinefile = GPATH; /* gline log file */
517	ConfigFileEntry.cresvfile = CRESVPATH; /* channel resv file */
518	ConfigFileEntry.nresvfile = NRESVPATH; /* nick resv file */
519	myargv = argv;
520	umask(077); /* better safe than sorry --SRB */
521
522	parseargs(&argc, &argv, myopts);
523
524	if (printVersion)
525	{
526	printf("ircd: version %s\n", ircd_version);
527	exit(EXIT_SUCCESS);
528	}
529
530	if (chdir(ConfigFileEntry.dpath))
531	{
532	perror("chdir");
533	exit(EXIT_FAILURE);
534	}
535
536	init_ssl();
537
538	if (!server_state.foreground)
539	{
540	make_daemon();
541	close_standard_fds(); /* this needs to be before init_netio()! */
542	}
543	else
544	print_startup(getpid());
545
546	setup_signals();
547
548	get_ircd_platform(ircd_platform);
549
550	/* Init the event subsystem */
551	eventInit();
552	/* We need this to initialise the fd array before anything else */
553	fdlist_init();
554	init_log(logFileName);
555	check_can_use_v6();
556	init_comm(); /* This needs to be setup early ! -- adrian */
557	/* Check if there is pidfile and daemon already running */
558	check_pidfile(pidFileName);
559
560	initBlockHeap();
561	init_dlink_nodes();
562	init_callbacks();
563	initialize_message_files();
564	dbuf_init();
565	init_hash();
566	init_ip_hash_table(); /* client host ip hash table */
567	init_host_hash(); /* Host-hashtable. */
568	clear_tree_parse();
569	init_client();
570	init_class();
571	init_whowas();
572	watch_init();
573	init_auth(); /* Initialise the auth code */
574	init_resolver(); /* Needs to be setup before the io loop */
575	read_conf_files(1); /* cold start init conf files */
576	init_uid();
577	initialize_server_capabs(); /* Set up default_server_capabs */
578	initialize_global_set_options();
579	init_channels();
580
581	if (EmptyString(ServerInfo.sid))
582	{
583	ilog(L_CRIT, "ERROR: No server id specified in serverinfo block.");
584	exit(EXIT_FAILURE);
585	}
586
587	strlcpy(me.id, ServerInfo.sid, sizeof(me.id));
588
589	if (EmptyString(ServerInfo.name))
590	{
591	ilog(L_CRIT, "ERROR: No server name specified in serverinfo block.");
592	exit(EXIT_FAILURE);
593	}
594
595	strlcpy(me.name, ServerInfo.name, sizeof(me.name));
596
597	/* serverinfo{} description must exist. If not, error out.*/
598	if (EmptyString(ServerInfo.description))
599	{
600	ilog(L_CRIT, "ERROR: No server description specified in serverinfo block.");
601	exit(EXIT_FAILURE);
602	}
603
604	strlcpy(me.info, ServerInfo.description, sizeof(me.info));
605
606	me.from = &me;
607	me.servptr = &me;
608	me.lasttime = me.since = me.firsttime = CurrentTime;
609
610	SetMe(&me);
611	make_server(&me);
612
613	hash_add_id(&me);
614	hash_add_client(&me);
615
616	/* add ourselves to global_serv_list */
617	dlinkAdd(&me, make_dlink_node(), &global_serv_list);
618
619	if (chdir(MODPATH))
620	{
621	ilog(L_CRIT, "Could not load core modules. Terminating!");
622	exit(EXIT_FAILURE);
623	}
624
625	load_all_modules(1);
626	load_conf_modules();
627	load_core_modules(1);
628
629	/* Go back to DPATH after checking to see if we can chdir to MODPATH */
630	if (chdir(ConfigFileEntry.dpath))
631	{
632	perror("chdir");
633	exit(EXIT_FAILURE);
634	}
635
636	/*
637	* assemble_umode_buffer() has to be called after
638	* reading conf/loading modules.
639	*/
640	assemble_umode_buffer();
641
642	write_pidfile(pidFileName);
643
644	ilog(L_NOTICE, "Server Ready");
645
646	eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
647	eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
648
649	/* We want try_connections to be called as soon as possible now! -- adrian */
650	/* No, 'cause after a restart it would cause all sorts of nick collides */
651	eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
652
653	eventAddIsh("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
654
655	/* Setup the timeout check. I'll shift it later :) -- adrian */
656	eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
657
658	if (ConfigServerHide.links_delay > 0)
659	eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
660	else
661	ConfigServerHide.links_disabled = 1;
662
663	if (splitmode)
664	eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
665
666	io_loop();
667	return 0;
668	}