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"

/* 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 
 */
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("LL", CAP_LL, 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)
{
#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)
{
  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);
}

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(&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));

  /* 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();

#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);

  setup_signals();

  get_ircd_platform(ircd_platform);

  init_log(logFileName);
  ServerInfo.can_use_v6 = check_can_use_v6();

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

  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();
  read_conf_files(1);   /* cold start init conf files */
  initServerMask();
  me.id[0] = '\0';
  init_uid();
  init_auth();          /* Initialise the auth code */
  initialize_server_capabs();   /* Set up default_server_capabs */
  initialize_global_set_options();
  init_channels();
  init_channel_modes();

  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);
}

#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:	185
Committed:	Sun Oct 23 15:39:00 2005 UTC (20 years, 9 months ago) by adx
Content type:	text/x-csrc
File size:	18506 byte(s)
Log Message:	* dynamic module support for win32
#	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
56			/* Try and find the correct name to use with getrlimit() for setting the max.
57			* number of files allowed to be open by this process.
58			*/
59
60			/* /quote set variables */
61			struct SetOptions GlobalSetOptions;
62
63			/* configuration set from ircd.conf */
64			struct config_file_entry ConfigFileEntry;
65			/* server info set from ircd.conf */
66			struct server_info ServerInfo;
67			/* admin info set from ircd.conf */
68			struct admin_info AdminInfo = { NULL, NULL, NULL };
69			struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0 };
70			struct ServerState_t server_state = { 0 };
71			struct logging_entry ConfigLoggingEntry = { 1, {0}, {0}, {0}, {0}, {0}, {0}, {0}, {0} };
72			struct Client me; /* That's me */
73			struct LocalUser meLocalUser; /* That's also part of me */
74			unsigned long connect_id = 0; /* unique connect ID */
75
76			static unsigned long initialVMTop = 0; /* top of virtual memory at init */
77			const char *logFileName = LPATH;
78			const char *pidFileName = PPATH;
79
80			char **myargv;
81			char ircd_platform[PLATFORMLEN];
82
83			int dorehash = 0;
84			int doremotd = 0;
85			time_t nextconnect = 1; /* time for next try_connections call */
86
87			/* Set to zero because it should be initialized later using
88			* initialize_server_capabs
89			*/
90			int default_server_capabs = 0;
91
92			#ifdef HAVE_LIBCRYPTO
93			int bio_spare_fd = -1;
94			#endif
95
96			int splitmode;
97			int splitchecking;
98			int split_users;
99			unsigned int split_servers;
100
101	adx	68	static dlink_node *fdlimit_hook;
102
103	adx	30	/* Do klines the same way hybrid-6 did them, i.e. at the
104			* top of the next io_loop instead of in the same loop as
105			* the klines are being applied.
106			*
107			* This should fix strange CPU starvation as very indirectly reported.
108			* (Why do you people not email bug reports? WHY? WHY?)
109			*
110			* - Dianora
111			*/
112
113			int rehashed_klines = 0;
114
115			/*
116			* get_vm_top - get the operating systems notion of the resident set size
117			*/
118			#ifndef _WIN32
119			static unsigned long
120			get_vm_top(void)
121			{
122			/*
123			* NOTE: sbrk is not part of the ANSI C library or the POSIX.1 standard
124			* however it seems that everyone defines it. Calling sbrk with a 0
125			* argument will return a pointer to the top of the process virtual
126			* memory without changing the process size, so this call should be
127			* reasonably safe (sbrk returns the new value for the top of memory).
128			* This code relies on the notion that the address returned will be an
129			* offset from 0 (NULL), so the result of sbrk is cast to a size_t and
130			* returned. We really shouldn't be using it here but...
131			*/
132
133			void *vptr = sbrk(0);
134			return((unsigned long)vptr);
135			}
136
137			/*
138			* print_startup - print startup information
139			*/
140			static void
141			print_startup(int pid)
142			{
143			printf("ircd: version %s\n", ircd_version);
144			printf("ircd: pid %d\n", pid);
145			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
146			: "foreground", ConfigFileEntry.dpath);
147			}
148
149			static void
150			make_daemon(void)
151			{
152			int pid;
153
154			if ((pid = fork()) < 0)
155			{
156			perror("fork");
157			exit(EXIT_FAILURE);
158			}
159			else if (pid > 0)
160			{
161			print_startup(pid);
162			exit(EXIT_SUCCESS);
163			}
164
165			setsid();
166			}
167			#endif
168
169			/*
170			* get_maxrss - get the operating systems notion of the resident set size
171			*/
172			unsigned long
173			get_maxrss(void)
174			{
175			#ifdef _WIN32
176			return (0); /* FIXME */
177			#else
178			return (get_vm_top() - initialVMTop);
179			#endif
180			}
181
182			static int printVersion = 0;
183
184			struct lgetopt myopts[] = {
185			{"dlinefile", &ConfigFileEntry.dlinefile,
186			STRING, "File to use for dline.conf"},
187			{"configfile", &ConfigFileEntry.configfile,
188			STRING, "File to use for ircd.conf"},
189			{"klinefile", &ConfigFileEntry.klinefile,
190			STRING, "File to use for kline.conf"},
191			{"xlinefile", &ConfigFileEntry.xlinefile,
192			STRING, "File to use for xline.conf"},
193			{"logfile", &logFileName,
194			STRING, "File to use for ircd.log"},
195			{"pidfile", &pidFileName,
196			STRING, "File to use for process ID"},
197			{"foreground", &server_state.foreground,
198			YESNO, "Run in foreground (don't detach)"},
199			{"version", &printVersion,
200			YESNO, "Print version and exit"},
201			{"help", NULL, USAGE, "Print this text"},
202			{NULL, NULL, STRING, NULL},
203			};
204
205			static void
206			io_loop(void)
207			{
208			while (1 == 1)
209			{
210			/*
211			* Maybe we want a flags word?
212			* ie. if (REHASHED_KLINES(global_flags))
213			* SET_REHASHED_KLINES(global_flags)
214			* CLEAR_REHASHED_KLINES(global_flags)
215			*
216			* - Dianora
217			*/
218			if (rehashed_klines)
219			{
220			check_conf_klines();
221			rehashed_klines = 0;
222			}
223
224			if (listing_client_list.head)
225			{
226			dlink_node ptr = NULL, ptr_next = NULL;
227			DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
228			{
229			struct Client *client_p = ptr->data;
230			assert(client_p->localClient->list_task);
231			safe_list_channels(client_p, client_p->localClient->list_task, 0, 0);
232			}
233			}
234
235			/* Run pending events, then get the number of seconds to the next
236			* event
237			*/
238			while (eventNextTime() <= CurrentTime)
239			eventRun();
240
241			comm_select();
242			exit_aborted_clients();
243			free_exited_clients();
244			send_queued_all();
245
246			/* Check to see whether we have to rehash the configuration .. */
247			if (dorehash)
248			{
249			rehash(1);
250			dorehash = 0;
251			}
252			if (doremotd)
253			{
254			read_message_file(&ConfigFileEntry.motd);
255			sendto_realops_flags(UMODE_ALL, L_ALL,
256			"Got signal SIGUSR1, reloading ircd motd file");
257			doremotd = 0;
258			}
259			}
260			}
261
262			/* initalialize_global_set_options()
263			*
264			* inputs - none
265			* output - none
266			* side effects - This sets all global set options needed
267			*/
268			static void
269			initialize_global_set_options(void)
270			{
271			memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
272
273			GlobalSetOptions.autoconn = 1;
274			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
275			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
276
277			if (ConfigFileEntry.default_floodcount)
278			GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
279			else
280			GlobalSetOptions.floodcount = 10;
281
282			/* XXX I have no idea what to try here - Dianora */
283			GlobalSetOptions.joinfloodcount = 16;
284			GlobalSetOptions.joinfloodtime = 8;
285
286			split_servers = ConfigChannel.default_split_server_count;
287			split_users = ConfigChannel.default_split_user_count;
288
289			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
290			ConfigChannel.no_join_on_split))
291			{
292			splitmode = 1;
293			splitchecking = 1;
294			}
295
296			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
297			GlobalSetOptions.idletime = ConfigFileEntry.idletime;
298			/* End of global set options */
299			}
300
301			/* initialize_message_files()
302			*
303			* inputs - none
304			* output - none
305			* side effects - Set up all message files needed, motd etc.
306			*/
307			static void
308			initialize_message_files(void)
309			{
310			init_message_file(USER_MOTD, MPATH, &ConfigFileEntry.motd);
311			init_message_file(OPER_MOTD, OPATH, &ConfigFileEntry.opermotd);
312			init_message_file(USER_LINKS, LIPATH, &ConfigFileEntry.linksfile);
313
314			read_message_file(&ConfigFileEntry.motd);
315			read_message_file(&ConfigFileEntry.opermotd);
316			read_message_file(&ConfigFileEntry.linksfile);
317
318			init_isupport();
319			}
320
321			/* initialize_server_capabs()
322			*
323			* inputs - none
324			* output - none
325			*/
326			static void
327			initialize_server_capabs(void)
328			{
329			add_capability("QS", CAP_QS, 1);
330			add_capability("LL", CAP_LL, 1);
331			add_capability("EOB", CAP_EOB, 1);
332			if (ServerInfo.sid != NULL) /* only enable TS6 if we have an SID */
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 = ircsprintf(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			#ifndef _WIN32
383			FBFILE *fb;
384			char buff[32];
385			pid_t pidfromfile;
386
387			/* Don't do logging here, since we don't have log() initialised */
388			if ((fb = fbopen(filename, "r")))
389			{
390			if (fbgets(buff, 20, fb) == NULL)
391			{
392			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
393			* strerror(errno));
394			*/
395			}
396			else
397			{
398			pidfromfile = atoi(buff);
399
400			if (!kill(pidfromfile, 0))
401			{
402			/* log(L_ERROR, "Server is already running"); */
403			printf("ircd: daemon is already running\n");
404			exit(-1);
405			}
406			}
407
408			fbclose(fb);
409			}
410			else if (errno != ENOENT)
411			{
412			/* log(L_ERROR, "Error opening pid file %s", filename); */
413			}
414			#endif
415			}
416
417			/* setup_corefile()
418			*
419			* inputs - nothing
420			* output - nothing
421			* side effects - setups corefile to system limits.
422			* -kre
423			*/
424			static void
425			setup_corefile(void)
426			{
427			#ifdef HAVE_SYS_RESOURCE_H
428			struct rlimit rlim; /* resource limits */
429
430			/* Set corefilesize to maximum */
431			if (!getrlimit(RLIMIT_CORE, &rlim))
432			{
433			rlim.rlim_cur = rlim.rlim_max;
434			setrlimit(RLIMIT_CORE, &rlim);
435			}
436			#endif
437			}
438
439			/* init_ssl()
440			*
441			* inputs - nothing
442			* output - nothing
443			* side effects - setups SSL context.
444			*/
445			static void
446			init_ssl(void)
447			{
448			#ifdef HAVE_LIBCRYPTO
449			SSL_load_error_strings();
450			SSLeay_add_ssl_algorithms();
451
452			ServerInfo.ctx = SSL_CTX_new(SSLv23_server_method());
453			if (!ServerInfo.ctx)
454			{
455			const char *s;
456
457			fprintf(stderr, "ERROR: Could not initialize the SSL context -- %s\n",
458			s = ERR_lib_error_string(ERR_get_error()));
459			ilog(L_CRIT, "ERROR: Could not initialize the SSL context -- %s\n", s);
460			}
461
462			SSL_CTX_set_options(ServerInfo.ctx, SSL_OP_NO_SSLv2);
463			SSL_CTX_set_options(ServerInfo.ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
464			SSL_CTX_set_verify(ServerInfo.ctx, SSL_VERIFY_NONE, NULL);
465
466			bio_spare_fd = save_spare_fd("SSL private key validation");
467			#endif /* HAVE_LIBCRYPTO */
468			}
469
470			/* init_callbacks()
471			*
472			* inputs - nothing
473			* output - nothing
474			* side effects - setups standard hook points
475			*/
476			static void
477			init_callbacks(void)
478			{
479	adx	178	iorecv_cb = register_callback("iorecv", iorecv_default);
480			iosend_cb = register_callback("iosend", iosend_default);
481	adx	30	iorecvctrl_cb = register_callback("iorecvctrl", NULL);
482			iosendctrl_cb = register_callback("iosendctrl", NULL);
483			}
484
485	adx	68	static void *
486			changing_fdlimit(va_list args)
487			{
488			int old_fdlimit = hard_fdlimit;
489			int fdmax = va_arg(args, int);
490
491			/* allow MAXCLIENTS_MIN clients even at the cost of MAX_BUFFER and
492			* some not really LEAKED_FDS */
493			fdmax = IRCD_MAX(fdmax, LEAKED_FDS + MAX_BUFFER + MAXCLIENTS_MIN);
494
495			pass_callback(fdlimit_hook, fdmax);
496
497			if (ServerInfo.max_clients > MAXCLIENTS_MAX)
498			{
499			if (old_fdlimit != 0)
500			sendto_realops_flags(UMODE_ALL, L_ALL,
501			"HARD_FDLIMIT changed to %d, adjusting MAXCLIENTS to %d",
502			hard_fdlimit, MAXCLIENTS_MAX);
503
504			ServerInfo.max_clients = MAXCLIENTS_MAX;
505			}
506
507			return NULL;
508			}
509
510	adx	185	EXTERN int
511	adx	30	main(int argc, char *argv[])
512			{
513			/* Check to see if the user is running
514			* us as root, which is a nono
515			*/
516			#ifndef _WIN32
517			if (geteuid() == 0)
518			{
519			fprintf(stderr, "Don't run ircd as root!!!\n");
520	adx	62	return 1;
521	adx	30	}
522
523			/* Setup corefile size immediately after boot -kre */
524			setup_corefile();
525
526			/* set initialVMTop before we allocate any memory */
527			initialVMTop = get_vm_top();
528			#endif
529
530			memset(&me, 0, sizeof(me));
531			memset(&meLocalUser, 0, sizeof(meLocalUser));
532			me.localClient = &meLocalUser;
533			dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
534			of Client list */
535
536			memset(&ServerInfo, 0, sizeof(ServerInfo));
537
538			/* Initialise the channel capability usage counts... */
539			init_chcap_usage_counts();
540
541			ConfigFileEntry.dpath = DPATH;
542			ConfigFileEntry.configfile = CPATH; /* Server configuration file */
543			ConfigFileEntry.klinefile = KPATH; /* Server kline file */
544			ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
545			ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file */
546			ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file */
547			ConfigFileEntry.dlinefile = DLPATH; /* dline file */
548			ConfigFileEntry.glinefile = GPATH; /* gline log file */
549			ConfigFileEntry.cresvfile = CRESVPATH; /* channel resv file */
550			ConfigFileEntry.nresvfile = NRESVPATH; /* nick resv file */
551			myargv = argv;
552			umask(077); /* better safe than sorry --SRB */
553
554			parseargs(&argc, &argv, myopts);
555
556			if (printVersion)
557			{
558			printf("ircd: version %s\n", ircd_version);
559			exit(EXIT_SUCCESS);
560			}
561
562			if (chdir(ConfigFileEntry.dpath))
563			{
564			perror("chdir");
565			exit(EXIT_FAILURE);
566			}
567
568			init_ssl();
569
570			#ifndef _WIN32
571			if (!server_state.foreground)
572			make_daemon();
573			else
574			print_startup(getpid());
575	adx	77	#endif
576	adx	30
577	adx	87	libio_init(!server_state.foreground);
578	adx	86	outofmemory = ircd_outofmemory;
579			fdlimit_hook = install_hook(fdlimit_cb, changing_fdlimit);
580
581	adx	30	setup_signals();
582
583			get_ircd_platform(ircd_platform);
584
585			init_log(logFileName);
586	adx	68	ServerInfo.can_use_v6 = check_can_use_v6();
587	adx	77
588	adx	30	/* Check if there is pidfile and daemon already running */
589			check_pidfile(pidFileName);
590
591			init_callbacks();
592			initialize_message_files();
593			init_hash();
594			init_ip_hash_table(); /* client host ip hash table */
595			init_host_hash(); /* Host-hashtable. */
596			clear_tree_parse();
597			init_client();
598			init_class();
599			init_whowas();
600			init_stats();
601			read_conf_files(1); /* cold start init conf files */
602			initServerMask();
603			me.id[0] = '\0';
604			init_uid();
605			init_auth(); /* Initialise the auth code */
606			initialize_server_capabs(); /* Set up default_server_capabs */
607			initialize_global_set_options();
608			init_channels();
609	adx	48	init_channel_modes();
610	adx	30
611			if (ServerInfo.name == NULL)
612			{
613			ilog(L_CRIT, "No server name specified in serverinfo block.");
614			exit(EXIT_FAILURE);
615			}
616			strlcpy(me.name, ServerInfo.name, sizeof(me.name));
617
618			/* serverinfo{} description must exist. If not, error out.*/
619			if (ServerInfo.description == NULL)
620			{
621			ilog(L_CRIT,
622			"ERROR: No server description specified in serverinfo block.");
623			exit(EXIT_FAILURE);
624			}
625			strlcpy(me.info, ServerInfo.description, sizeof(me.info));
626
627			me.from = &me;
628			me.servptr = &me;
629
630			SetMe(&me);
631			make_server(&me);
632
633			me.lasttime = me.since = me.firsttime = CurrentTime;
634			hash_add_client(&me);
635
636			/* add ourselves to global_serv_list */
637			dlinkAdd(&me, make_dlink_node(), &global_serv_list);
638
639			check_class();
640
641			#ifndef STATIC_MODULES
642			if (chdir(MODPATH))
643			{
644			ilog (L_CRIT, "Could not load core modules. Terminating!");
645			exit(EXIT_FAILURE);
646			}
647
648			load_all_modules(1);
649			load_conf_modules();
650			load_core_modules(1);
651			/* Go back to DPATH after checking to see if we can chdir to MODPATH */
652			chdir(ConfigFileEntry.dpath);
653			#else
654			load_all_modules(1);
655			#endif
656			/*
657			* assemble_umode_buffer() has to be called after
658			* reading conf/loading modules.
659			*/
660			assemble_umode_buffer();
661
662			write_pidfile(pidFileName);
663
664			ilog(L_NOTICE, "Server Ready");
665
666			eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
667			eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
668
669			/* We want try_connections to be called as soon as possible now! -- adrian */
670			/* No, 'cause after a restart it would cause all sorts of nick collides */
671			eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
672
673			eventAddIsh("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
674
675			/* Setup the timeout check. I'll shift it later :) -- adrian */
676			eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
677
678			if (ConfigServerHide.links_delay > 0)
679			eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
680			else
681			ConfigServerHide.links_disabled = 1;
682
683			if (splitmode)
684			eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
685
686			io_loop();
687			return(0);
688			}
689	adx	185
690			#else
691
692			#include <windows.h>
693
694			extern __declspec(dllimport) main(int, char **);
695
696			/*
697			* Initial entry point for Win32 GUI applications, called by the C runtime.
698			*
699			* It should be only a wrapper for main(), since when compiled as a console
700			* application, main() is called instead.
701			*/
702			int WINAPI
703			WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
704			LPSTR lpCmdLine, int nCmdShow)
705			{
706			/* Do we really need these pidfile, logfile etc arguments?
707			* And we are not on a console, so -help or -foreground is meaningless. */
708
709			char *argv[2] = {"ircd", NULL};
710
711			return main(1, argv);
712			}
713
714			#endif