ircd-hybrid/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
 *
 *  $Id$
 */

#ifdef IN_IRCD
#include "stdinc.h"
#include "s_user.h"
#include "ircd.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "common.h"
#include "hash.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 "restart.h"
#include "s_auth.h"
#include "s_conf.h"
#include "parse_aline.h"
#include "s_serv.h"
#include "s_stats.h"
#include "send.h"
#include "whowas.h"
#include "modules.h"
#include "ircd_getopt.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 Client me;             /* That's me */
struct LocalUser meLocalUser; /* That's also part of me */
unsigned long connect_id = 0; /* unique connect ID */

static unsigned long initialVMTop = 0;   /* top of virtual memory at init */
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;

static dlink_node *fdlimit_hook;

/* 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;

/*
 * get_vm_top - get the operating systems notion of the resident set size
 */
#ifndef _WIN32
static unsigned long
get_vm_top(void)
{
  /*
   * NOTE: sbrk is not part of the ANSI C library or the POSIX.1 standard
   * however it seems that everyone defines it. Calling sbrk with a 0
   * argument will return a pointer to the top of the process virtual
   * memory without changing the process size, so this call should be
   * reasonably safe (sbrk returns the new value for the top of memory).
   * This code relies on the notion that the address returned will be an 
   * offset from 0 (NULL), so the result of sbrk is cast to a size_t and 
   * returned. We really shouldn't be using it here but...
   */

  void *vptr = sbrk(0);
  return((unsigned long)vptr);
}

/*
 * 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();
}
#endif

/*
 * get_maxrss - get the operating systems notion of the resident set size
 */
unsigned long
get_maxrss(void)
{
#ifdef _WIN32
  return (0);   /* FIXME */
#else
  return (get_vm_top() - initialVMTop);
#endif
}

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},
};

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, 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 
 * XXX to be removed with old s_conf.c
 */
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);
  add_capability("HUB", CAP_HUB, 0);
  add_capability("LL", CAP_LL, 0);
  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)
{
#ifndef _WIN32
  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); */
  }
#endif
}

/* 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();

  ServerInfo.ctx = SSL_CTX_new(SSLv23_server_method());
  if (!ServerInfo.ctx)
  {
    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.ctx, SSL_OP_NO_SSLv2);
  SSL_CTX_set_options(ServerInfo.ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
  SSL_CTX_set_verify(ServerInfo.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)
{
  entering_umode_cb = register_callback("entering_umode", NULL);
  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);
  uid_get_cb = register_callback("uid_get", uid_get);
  umode_cb = register_callback("changing_umode", change_simple_umode);
}

static void *
changing_fdlimit(va_list args)
{
  int old_fdlimit = hard_fdlimit;
  int fdmax = va_arg(args, int);

  /* allow MAXCLIENTS_MIN clients even at the cost of MAX_BUFFER and
   * some not really LEAKED_FDS */
  fdmax = IRCD_MAX(fdmax, LEAKED_FDS + MAX_BUFFER + MAXCLIENTS_MIN);

  pass_callback(fdlimit_hook, fdmax);

  if (ServerInfo.max_clients > MAXCLIENTS_MAX)
  {
    if (old_fdlimit != 0)
      sendto_realops_flags(UMODE_ALL, L_ALL,
        "HARD_FDLIMIT changed to %d, adjusting MAXCLIENTS to %d",
        hard_fdlimit, MAXCLIENTS_MAX);

    ServerInfo.max_clients = MAXCLIENTS_MAX;
  }

  return NULL;
}

EXTERN int
main(int argc, char *argv[])
{
  /* Check to see if the user is running
   * us as root, which is a nono
   */
#ifndef _WIN32
  if (geteuid() == 0)
  {
    fprintf(stderr, "Don't run ircd as root!!!\n");
    return 1;
  }

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

  /* set initialVMTop before we allocate any memory */
  initialVMTop = get_vm_top();
#endif

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

  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();

#ifndef _WIN32
  if (!server_state.foreground)
    make_daemon();
  else
    print_startup(getpid());
#endif

  libio_init(!server_state.foreground);
  outofmemory = ircd_outofmemory;
  fdlimit_hook = install_hook(fdlimit_cb, changing_fdlimit);

  check_pidfile(pidFileName);
  setup_signals();
  get_ircd_platform(ircd_platform);
  init_log(logFileName);
  ServerInfo.can_use_v6 = check_can_use_v6();

  /* make_dlink_node() cannot be called until after libio_init() */
  memset(&me, 0, sizeof(me));
  memset(&meLocalUser, 0, sizeof(meLocalUser));
  me.localClient = &meLocalUser;
  me.from = me.servptr = &me;
  me.lasttime = me.since = me.firsttime = CurrentTime;

  SetMe(&me);
  make_server(&me);
  dlinkAdd(&me, &me.node, &global_client_list);
  dlinkAdd(&me, make_dlink_node(), &global_serv_list);

  init_callbacks();
  initialize_message_files();
  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();
  init_stats();
  initServerMask();
  init_auth();          /* Initialise the auth code */
  init_channels();
  init_channel_modes();
  initialize_server_capabs();   /* Set up default_server_capabs */

  read_conf_files(1);   /* cold start init conf files */
  check_class();
  init_watch();

  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));

  hash_add_client(&me);

  init_uid();     /* XXX move this one up after inculcating new conf system */
  initialize_global_set_options();   /* and this one is going to be deleted */

#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);

  /* XXX to be removed with old s_conf.c [superseded] */
  if (ConfigServerHide.links_delay > 0)
    eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
  else
    ConfigServerHide.links_disabled = 1;

  if (splitmode)   /* XXX */
    eventAddIsh("check_splitmode", check_splitmode, NULL, 60);

  io_loop();
  return(0);
}

#else

#include <windows.h>

extern __declspec(dllimport) main(int, char **);

/*
 * Initial entry point for Win32 GUI applications, called by the C runtime.
 *
 * It should be only a wrapper for main(), since when compiled as a console
 * application, main() is called instead.
 */
int WINAPI
WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
        LPSTR lpCmdLine, int nCmdShow)
{
  /* Do we really need these pidfile, logfile etc arguments?
   * And we are not on a console, so -help or -foreground is meaningless. */

  char *argv[2] = {"ircd", NULL};

  return main(1, argv);
}

#endif
Revision:	257
Committed:	Sat Nov 12 16:00:08 2005 UTC (20 years, 9 months ago) by michael
Content type:	text/x-csrc
File size:	18705 byte(s)
Log Message:	- Forgot to remove my debugging 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	adx	185	#ifdef IN_IRCD
26	adx	30	#include "stdinc.h"
27			#include "s_user.h"
28			#include "ircd.h"
29			#include "channel.h"
30			#include "channel_mode.h"
31			#include "client.h"
32			#include "common.h"
33			#include "hash.h"
34			#include "ircd_signal.h"
35			#include "s_gline.h"
36			#include "motd.h"
37			#include "ircd_handler.h"
38			#include "msg.h" /* msgtab */
39			#include "hostmask.h"
40			#include "numeric.h"
41			#include "packet.h"
42			#include "parse.h"
43			#include "restart.h"
44			#include "s_auth.h"
45			#include "s_conf.h"
46	db	91	#include "parse_aline.h"
47			#include "s_serv.h"
48	adx	30	#include "s_stats.h"
49			#include "send.h"
50			#include "whowas.h"
51			#include "modules.h"
52			#include "ircd_getopt.h"
53			#include "motd.h"
54			#include "supported.h"
55	michael	217	#include "watch.h"
56	adx	30
57			/* Try and find the correct name to use with getrlimit() for setting the max.
58			* number of files allowed to be open by this process.
59			*/
60
61			/* /quote set variables */
62			struct SetOptions GlobalSetOptions;
63
64			/* configuration set from ircd.conf */
65			struct config_file_entry ConfigFileEntry;
66			/* server info set from ircd.conf */
67			struct server_info ServerInfo;
68			/* admin info set from ircd.conf */
69			struct admin_info AdminInfo = { NULL, NULL, NULL };
70			struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0 };
71			struct ServerState_t server_state = { 0 };
72			struct logging_entry ConfigLoggingEntry = { 1, {0}, {0}, {0}, {0}, {0}, {0}, {0}, {0} };
73			struct Client me; /* That's me */
74			struct LocalUser meLocalUser; /* That's also part of me */
75			unsigned long connect_id = 0; /* unique connect ID */
76
77			static unsigned long initialVMTop = 0; /* top of virtual memory at init */
78			const char *logFileName = LPATH;
79			const char *pidFileName = PPATH;
80
81			char **myargv;
82			char ircd_platform[PLATFORMLEN];
83
84			int dorehash = 0;
85			int doremotd = 0;
86			time_t nextconnect = 1; /* time for next try_connections call */
87
88			/* Set to zero because it should be initialized later using
89			* initialize_server_capabs
90			*/
91			int default_server_capabs = 0;
92
93			#ifdef HAVE_LIBCRYPTO
94			int bio_spare_fd = -1;
95			#endif
96
97			int splitmode;
98			int splitchecking;
99			int split_users;
100			unsigned int split_servers;
101
102	adx	68	static dlink_node *fdlimit_hook;
103
104	adx	30	/* Do klines the same way hybrid-6 did them, i.e. at the
105			* top of the next io_loop instead of in the same loop as
106			* the klines are being applied.
107			*
108			* This should fix strange CPU starvation as very indirectly reported.
109			* (Why do you people not email bug reports? WHY? WHY?)
110			*
111			* - Dianora
112			*/
113
114			int rehashed_klines = 0;
115
116			/*
117			* get_vm_top - get the operating systems notion of the resident set size
118			*/
119			#ifndef _WIN32
120			static unsigned long
121			get_vm_top(void)
122			{
123			/*
124			* NOTE: sbrk is not part of the ANSI C library or the POSIX.1 standard
125			* however it seems that everyone defines it. Calling sbrk with a 0
126			* argument will return a pointer to the top of the process virtual
127			* memory without changing the process size, so this call should be
128			* reasonably safe (sbrk returns the new value for the top of memory).
129			* This code relies on the notion that the address returned will be an
130			* offset from 0 (NULL), so the result of sbrk is cast to a size_t and
131			* returned. We really shouldn't be using it here but...
132			*/
133
134			void *vptr = sbrk(0);
135			return((unsigned long)vptr);
136			}
137
138			/*
139			* print_startup - print startup information
140			*/
141			static void
142			print_startup(int pid)
143			{
144			printf("ircd: version %s\n", ircd_version);
145			printf("ircd: pid %d\n", pid);
146			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
147			: "foreground", ConfigFileEntry.dpath);
148			}
149
150			static void
151			make_daemon(void)
152			{
153			int pid;
154
155			if ((pid = fork()) < 0)
156			{
157			perror("fork");
158			exit(EXIT_FAILURE);
159			}
160			else if (pid > 0)
161			{
162			print_startup(pid);
163			exit(EXIT_SUCCESS);
164			}
165
166			setsid();
167			}
168			#endif
169
170			/*
171			* get_maxrss - get the operating systems notion of the resident set size
172			*/
173			unsigned long
174			get_maxrss(void)
175			{
176			#ifdef _WIN32
177			return (0); /* FIXME */
178			#else
179			return (get_vm_top() - initialVMTop);
180			#endif
181			}
182
183			static int printVersion = 0;
184
185			struct lgetopt myopts[] = {
186			{"dlinefile", &ConfigFileEntry.dlinefile,
187			STRING, "File to use for dline.conf"},
188			{"configfile", &ConfigFileEntry.configfile,
189			STRING, "File to use for ircd.conf"},
190			{"klinefile", &ConfigFileEntry.klinefile,
191			STRING, "File to use for kline.conf"},
192			{"xlinefile", &ConfigFileEntry.xlinefile,
193			STRING, "File to use for xline.conf"},
194			{"logfile", &logFileName,
195			STRING, "File to use for ircd.log"},
196			{"pidfile", &pidFileName,
197			STRING, "File to use for process ID"},
198			{"foreground", &server_state.foreground,
199			YESNO, "Run in foreground (don't detach)"},
200			{"version", &printVersion,
201			YESNO, "Print version and exit"},
202			{"help", NULL, USAGE, "Print this text"},
203			{NULL, NULL, STRING, NULL},
204			};
205
206			static void
207			io_loop(void)
208			{
209			while (1 == 1)
210			{
211			/*
212			* Maybe we want a flags word?
213			* ie. if (REHASHED_KLINES(global_flags))
214			* SET_REHASHED_KLINES(global_flags)
215			* CLEAR_REHASHED_KLINES(global_flags)
216			*
217			* - Dianora
218			*/
219			if (rehashed_klines)
220			{
221			check_conf_klines();
222			rehashed_klines = 0;
223			}
224
225			if (listing_client_list.head)
226			{
227			dlink_node ptr = NULL, ptr_next = NULL;
228			DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
229			{
230			struct Client *client_p = ptr->data;
231			assert(client_p->localClient->list_task);
232			safe_list_channels(client_p, client_p->localClient->list_task, 0, 0);
233			}
234			}
235
236			/* Run pending events, then get the number of seconds to the next
237			* event
238			*/
239			while (eventNextTime() <= CurrentTime)
240			eventRun();
241
242			comm_select();
243			exit_aborted_clients();
244			free_exited_clients();
245			send_queued_all();
246
247			/* Check to see whether we have to rehash the configuration .. */
248			if (dorehash)
249			{
250			rehash(1);
251			dorehash = 0;
252			}
253			if (doremotd)
254			{
255			read_message_file(&ConfigFileEntry.motd);
256			sendto_realops_flags(UMODE_ALL, L_ALL,
257			"Got signal SIGUSR1, reloading ircd motd file");
258			doremotd = 0;
259			}
260			}
261			}
262
263			/* initalialize_global_set_options()
264			*
265			* inputs - none
266			* output - none
267			* side effects - This sets all global set options needed
268	adx	205	* XXX to be removed with old s_conf.c
269	adx	30	*/
270			static void
271			initialize_global_set_options(void)
272			{
273			memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
274
275			GlobalSetOptions.autoconn = 1;
276			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
277			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
278
279			if (ConfigFileEntry.default_floodcount)
280			GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
281			else
282			GlobalSetOptions.floodcount = 10;
283
284			/* XXX I have no idea what to try here - Dianora */
285			GlobalSetOptions.joinfloodcount = 16;
286			GlobalSetOptions.joinfloodtime = 8;
287
288			split_servers = ConfigChannel.default_split_server_count;
289			split_users = ConfigChannel.default_split_user_count;
290
291			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
292			ConfigChannel.no_join_on_split))
293			{
294			splitmode = 1;
295			splitchecking = 1;
296			}
297
298			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
299			GlobalSetOptions.idletime = ConfigFileEntry.idletime;
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	adx	208	add_capability("HUB", CAP_HUB, 0);
334			add_capability("LL", CAP_LL, 0);
335	adx	211	add_capability("TS6", CAP_TS6, 0);
336	adx	30	add_capability("ZIP", CAP_ZIP, 0);
337			add_capability("CLUSTER", CAP_CLUSTER, 1);
338			#ifdef HALFOPS
339			add_capability("HOPS", CAP_HOPS, 1);
340			#endif
341			}
342
343			/* write_pidfile()
344			*
345			* inputs - filename+path of pid file
346			* output - NONE
347			* side effects - write the pid of the ircd to filename
348			*/
349			static void
350			write_pidfile(const char *filename)
351			{
352			FBFILE *fb;
353
354			if ((fb = fbopen(filename, "w")))
355			{
356			char buff[32];
357			unsigned int pid = (unsigned int)getpid();
358			size_t nbytes = ircsprintf(buff, "%u\n", pid);
359
360			if ((fbputs(buff, fb, nbytes) == -1))
361			ilog(L_ERROR, "Error writing %u to pid file %s (%s)",
362			pid, filename, strerror(errno));
363
364			fbclose(fb);
365			return;
366			}
367			else
368			{
369			ilog(L_ERROR, "Error opening pid file %s", filename);
370			}
371			}
372
373			/* check_pidfile()
374			*
375			* inputs - filename+path of pid file
376			* output - none
377			* side effects - reads pid from pidfile and checks if ircd is in process
378			* list. if it is, gracefully exits
379			* -kre
380			*/
381			static void
382			check_pidfile(const char *filename)
383			{
384			#ifndef _WIN32
385			FBFILE *fb;
386			char buff[32];
387			pid_t pidfromfile;
388
389			/* Don't do logging here, since we don't have log() initialised */
390			if ((fb = fbopen(filename, "r")))
391			{
392			if (fbgets(buff, 20, fb) == NULL)
393			{
394			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
395			* strerror(errno));
396			*/
397			}
398			else
399			{
400			pidfromfile = atoi(buff);
401
402			if (!kill(pidfromfile, 0))
403			{
404			/* log(L_ERROR, "Server is already running"); */
405			printf("ircd: daemon is already running\n");
406			exit(-1);
407			}
408			}
409
410			fbclose(fb);
411			}
412			else if (errno != ENOENT)
413			{
414			/* log(L_ERROR, "Error opening pid file %s", filename); */
415			}
416			#endif
417			}
418
419			/* setup_corefile()
420			*
421			* inputs - nothing
422			* output - nothing
423			* side effects - setups corefile to system limits.
424			* -kre
425			*/
426			static void
427			setup_corefile(void)
428			{
429			#ifdef HAVE_SYS_RESOURCE_H
430			struct rlimit rlim; /* resource limits */
431
432			/* Set corefilesize to maximum */
433			if (!getrlimit(RLIMIT_CORE, &rlim))
434			{
435			rlim.rlim_cur = rlim.rlim_max;
436			setrlimit(RLIMIT_CORE, &rlim);
437			}
438			#endif
439			}
440
441			/* init_ssl()
442			*
443			* inputs - nothing
444			* output - nothing
445			* side effects - setups SSL context.
446			*/
447			static void
448			init_ssl(void)
449			{
450			#ifdef HAVE_LIBCRYPTO
451			SSL_load_error_strings();
452			SSLeay_add_ssl_algorithms();
453
454			ServerInfo.ctx = SSL_CTX_new(SSLv23_server_method());
455			if (!ServerInfo.ctx)
456			{
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			SSL_CTX_set_options(ServerInfo.ctx, SSL_OP_NO_SSLv2);
465			SSL_CTX_set_options(ServerInfo.ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
466			SSL_CTX_set_verify(ServerInfo.ctx, SSL_VERIFY_NONE, NULL);
467
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	211	entering_umode_cb = register_callback("entering_umode", NULL);
482	adx	178	iorecv_cb = register_callback("iorecv", iorecv_default);
483			iosend_cb = register_callback("iosend", iosend_default);
484	adx	30	iorecvctrl_cb = register_callback("iorecvctrl", NULL);
485			iosendctrl_cb = register_callback("iosendctrl", NULL);
486	adx	211	uid_get_cb = register_callback("uid_get", uid_get);
487			umode_cb = register_callback("changing_umode", change_simple_umode);
488	adx	30	}
489
490	adx	68	static void *
491			changing_fdlimit(va_list args)
492			{
493			int old_fdlimit = hard_fdlimit;
494			int fdmax = va_arg(args, int);
495
496			/* allow MAXCLIENTS_MIN clients even at the cost of MAX_BUFFER and
497			* some not really LEAKED_FDS */
498			fdmax = IRCD_MAX(fdmax, LEAKED_FDS + MAX_BUFFER + MAXCLIENTS_MIN);
499
500			pass_callback(fdlimit_hook, fdmax);
501
502			if (ServerInfo.max_clients > MAXCLIENTS_MAX)
503			{
504			if (old_fdlimit != 0)
505			sendto_realops_flags(UMODE_ALL, L_ALL,
506			"HARD_FDLIMIT changed to %d, adjusting MAXCLIENTS to %d",
507			hard_fdlimit, MAXCLIENTS_MAX);
508
509			ServerInfo.max_clients = MAXCLIENTS_MAX;
510			}
511
512			return NULL;
513			}
514
515	adx	185	EXTERN int
516	adx	30	main(int argc, char *argv[])
517			{
518			/* Check to see if the user is running
519			* us as root, which is a nono
520			*/
521			#ifndef _WIN32
522			if (geteuid() == 0)
523			{
524			fprintf(stderr, "Don't run ircd as root!!!\n");
525	adx	62	return 1;
526	adx	30	}
527
528			/* Setup corefile size immediately after boot -kre */
529			setup_corefile();
530
531			/* set initialVMTop before we allocate any memory */
532			initialVMTop = get_vm_top();
533			#endif
534
535			memset(&ServerInfo, 0, sizeof(ServerInfo));
536
537			ConfigFileEntry.dpath = DPATH;
538			ConfigFileEntry.configfile = CPATH; /* Server configuration file */
539			ConfigFileEntry.klinefile = KPATH; /* Server kline file */
540			ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
541			ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file */
542			ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file */
543			ConfigFileEntry.dlinefile = DLPATH; /* dline file */
544			ConfigFileEntry.glinefile = GPATH; /* gline log file */
545			ConfigFileEntry.cresvfile = CRESVPATH; /* channel resv file */
546			ConfigFileEntry.nresvfile = NRESVPATH; /* nick resv file */
547			myargv = argv;
548			umask(077); /* better safe than sorry --SRB */
549
550			parseargs(&argc, &argv, myopts);
551
552			if (printVersion)
553			{
554			printf("ircd: version %s\n", ircd_version);
555			exit(EXIT_SUCCESS);
556			}
557
558			if (chdir(ConfigFileEntry.dpath))
559			{
560			perror("chdir");
561			exit(EXIT_FAILURE);
562			}
563
564			init_ssl();
565
566			#ifndef _WIN32
567			if (!server_state.foreground)
568			make_daemon();
569			else
570			print_startup(getpid());
571	adx	77	#endif
572	adx	30
573	adx	87	libio_init(!server_state.foreground);
574	adx	229	outofmemory = ircd_outofmemory;
575			fdlimit_hook = install_hook(fdlimit_cb, changing_fdlimit);
576
577	adx	230	check_pidfile(pidFileName);
578	adx	229	setup_signals();
579			get_ircd_platform(ircd_platform);
580			init_log(logFileName);
581			ServerInfo.can_use_v6 = check_can_use_v6();
582
583	db	228	/* make_dlink_node() cannot be called until after libio_init() */
584			memset(&me, 0, sizeof(me));
585			memset(&meLocalUser, 0, sizeof(meLocalUser));
586			me.localClient = &meLocalUser;
587			me.from = me.servptr = &me;
588			me.lasttime = me.since = me.firsttime = CurrentTime;
589
590			SetMe(&me);
591			make_server(&me);
592			dlinkAdd(&me, &me.node, &global_client_list);
593			dlinkAdd(&me, make_dlink_node(), &global_serv_list);
594
595	adx	30	init_callbacks();
596			initialize_message_files();
597			init_hash();
598			init_ip_hash_table(); /* client host ip hash table */
599			init_host_hash(); /* Host-hashtable. */
600			clear_tree_parse();
601			init_client();
602			init_class();
603			init_whowas();
604			init_stats();
605			initServerMask();
606			init_auth(); /* Initialise the auth code */
607			init_channels();
608	adx	48	init_channel_modes();
609	adx	211	initialize_server_capabs(); /* Set up default_server_capabs */
610	adx	30
611	adx	211	read_conf_files(1); /* cold start init conf files */
612			check_class();
613	michael	217	init_watch();
614	adx	211
615	adx	30	if (ServerInfo.name == NULL)
616			{
617			ilog(L_CRIT, "No server name specified in serverinfo block.");
618			exit(EXIT_FAILURE);
619			}
620			strlcpy(me.name, ServerInfo.name, sizeof(me.name));
621
622			/* serverinfo{} description must exist. If not, error out.*/
623			if (ServerInfo.description == NULL)
624			{
625			ilog(L_CRIT,
626			"ERROR: No server description specified in serverinfo block.");
627			exit(EXIT_FAILURE);
628			}
629			strlcpy(me.info, ServerInfo.description, sizeof(me.info));
630
631			hash_add_client(&me);
632
633	adx	211	init_uid(); /* XXX move this one up after inculcating new conf system */
634			initialize_global_set_options(); /* and this one is going to be deleted */
635	michael	257
636	adx	30	#ifndef STATIC_MODULES
637			if (chdir(MODPATH))
638			{
639			ilog (L_CRIT, "Could not load core modules. Terminating!");
640			exit(EXIT_FAILURE);
641			}
642	michael	257
643	adx	30	load_all_modules(1);
644			load_conf_modules();
645			load_core_modules(1);
646	michael	257
647	adx	30	/* Go back to DPATH after checking to see if we can chdir to MODPATH */
648			chdir(ConfigFileEntry.dpath);
649			#else
650			load_all_modules(1);
651			#endif
652			/*
653			* assemble_umode_buffer() has to be called after
654			* reading conf/loading modules.
655			*/
656			assemble_umode_buffer();
657
658			write_pidfile(pidFileName);
659
660			ilog(L_NOTICE, "Server Ready");
661
662			eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
663			eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
664
665			/* We want try_connections to be called as soon as possible now! -- adrian */
666			/* No, 'cause after a restart it would cause all sorts of nick collides */
667			eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
668
669			eventAddIsh("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
670
671			/* Setup the timeout check. I'll shift it later :) -- adrian */
672			eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
673
674	adx	205	/* XXX to be removed with old s_conf.c [superseded] */
675	adx	30	if (ConfigServerHide.links_delay > 0)
676			eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
677			else
678			ConfigServerHide.links_disabled = 1;
679
680	adx	205	if (splitmode) /* XXX */
681	adx	30	eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
682
683			io_loop();
684			return(0);
685			}
686	adx	185
687			#else
688
689			#include <windows.h>
690
691			extern __declspec(dllimport) main(int, char **);
692
693			/*
694			* Initial entry point for Win32 GUI applications, called by the C runtime.
695			*
696			* It should be only a wrapper for main(), since when compiled as a console
697			* application, main() is called instead.
698			*/
699			int WINAPI
700			WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
701			LPSTR lpCmdLine, int nCmdShow)
702			{
703			/* Do we really need these pidfile, logfile etc arguments?
704			* And we are not on a console, so -help or -foreground is meaningless. */
705
706			char *argv[2] = {"ircd", NULL};
707
708			return main(1, argv);
709			}
710
711			#endif