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
 *
 *  $Id$
 */

#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", NULL);
  iosend_cb = register_callback("iosend", NULL);
  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;
}

#ifdef _WIN32
/*
 * 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

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);
}
Revision:	153
Committed:	Mon Oct 17 21:20:34 2005 UTC (20 years, 9 months ago) by adx
Content type:	text/x-csrc
File size:	18398 byte(s)
Log Message:	- compile libio as a dll on win32 - next step is compiling the whole ircd as a dll to export its symbols - after that, we'll be able to support loadable *.dll modules. NOTE: m_operspy.c doesn't compile now (error at localClient->iline)
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* ircd.c: Starts up and runs the ircd.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26			#include "s_user.h"
27			#include "ircd.h"
28			#include "channel.h"
29			#include "channel_mode.h"
30			#include "client.h"
31			#include "common.h"
32			#include "hash.h"
33			#include "ircd_signal.h"
34			#include "s_gline.h"
35			#include "motd.h"
36			#include "ircd_handler.h"
37			#include "msg.h" /* msgtab */
38			#include "hostmask.h"
39			#include "numeric.h"
40			#include "packet.h"
41			#include "parse.h"
42			#include "restart.h"
43			#include "s_auth.h"
44			#include "s_conf.h"
45	db	91	#include "parse_aline.h"
46			#include "s_serv.h"
47	adx	30	#include "s_stats.h"
48			#include "send.h"
49			#include "whowas.h"
50			#include "modules.h"
51			#include "ircd_getopt.h"
52			#include "motd.h"
53			#include "supported.h"
54
55			/* Try and find the correct name to use with getrlimit() for setting the max.
56			* number of files allowed to be open by this process.
57			*/
58
59			/* /quote set variables */
60			struct SetOptions GlobalSetOptions;
61
62			/* configuration set from ircd.conf */
63			struct config_file_entry ConfigFileEntry;
64			/* server info set from ircd.conf */
65			struct server_info ServerInfo;
66			/* admin info set from ircd.conf */
67			struct admin_info AdminInfo = { NULL, NULL, NULL };
68			struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0 };
69			struct ServerState_t server_state = { 0 };
70			struct logging_entry ConfigLoggingEntry = { 1, {0}, {0}, {0}, {0}, {0}, {0}, {0}, {0} };
71			struct Client me; /* That's me */
72			struct LocalUser meLocalUser; /* That's also part of me */
73			unsigned long connect_id = 0; /* unique connect ID */
74
75			static unsigned long initialVMTop = 0; /* top of virtual memory at init */
76			const char *logFileName = LPATH;
77			const char *pidFileName = PPATH;
78
79			char **myargv;
80			char ircd_platform[PLATFORMLEN];
81
82			int dorehash = 0;
83			int doremotd = 0;
84			time_t nextconnect = 1; /* time for next try_connections call */
85
86			/* Set to zero because it should be initialized later using
87			* initialize_server_capabs
88			*/
89			int default_server_capabs = 0;
90
91			#ifdef HAVE_LIBCRYPTO
92			int bio_spare_fd = -1;
93			#endif
94
95			int splitmode;
96			int splitchecking;
97			int split_users;
98			unsigned int split_servers;
99
100	adx	68	static dlink_node *fdlimit_hook;
101
102	adx	30	/* Do klines the same way hybrid-6 did them, i.e. at the
103			* top of the next io_loop instead of in the same loop as
104			* the klines are being applied.
105			*
106			* This should fix strange CPU starvation as very indirectly reported.
107			* (Why do you people not email bug reports? WHY? WHY?)
108			*
109			* - Dianora
110			*/
111
112			int rehashed_klines = 0;
113
114			/*
115			* get_vm_top - get the operating systems notion of the resident set size
116			*/
117			#ifndef _WIN32
118			static unsigned long
119			get_vm_top(void)
120			{
121			/*
122			* NOTE: sbrk is not part of the ANSI C library or the POSIX.1 standard
123			* however it seems that everyone defines it. Calling sbrk with a 0
124			* argument will return a pointer to the top of the process virtual
125			* memory without changing the process size, so this call should be
126			* reasonably safe (sbrk returns the new value for the top of memory).
127			* This code relies on the notion that the address returned will be an
128			* offset from 0 (NULL), so the result of sbrk is cast to a size_t and
129			* returned. We really shouldn't be using it here but...
130			*/
131
132			void *vptr = sbrk(0);
133			return((unsigned long)vptr);
134			}
135
136			/*
137			* print_startup - print startup information
138			*/
139			static void
140			print_startup(int pid)
141			{
142			printf("ircd: version %s\n", ircd_version);
143			printf("ircd: pid %d\n", pid);
144			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
145			: "foreground", ConfigFileEntry.dpath);
146			}
147
148			static void
149			make_daemon(void)
150			{
151			int pid;
152
153			if ((pid = fork()) < 0)
154			{
155			perror("fork");
156			exit(EXIT_FAILURE);
157			}
158			else if (pid > 0)
159			{
160			print_startup(pid);
161			exit(EXIT_SUCCESS);
162			}
163
164			setsid();
165			}
166			#endif
167
168			/*
169			* get_maxrss - get the operating systems notion of the resident set size
170			*/
171			unsigned long
172			get_maxrss(void)
173			{
174			#ifdef _WIN32
175			return (0); /* FIXME */
176			#else
177			return (get_vm_top() - initialVMTop);
178			#endif
179			}
180
181			static int printVersion = 0;
182
183			struct lgetopt myopts[] = {
184			{"dlinefile", &ConfigFileEntry.dlinefile,
185			STRING, "File to use for dline.conf"},
186			{"configfile", &ConfigFileEntry.configfile,
187			STRING, "File to use for ircd.conf"},
188			{"klinefile", &ConfigFileEntry.klinefile,
189			STRING, "File to use for kline.conf"},
190			{"xlinefile", &ConfigFileEntry.xlinefile,
191			STRING, "File to use for xline.conf"},
192			{"logfile", &logFileName,
193			STRING, "File to use for ircd.log"},
194			{"pidfile", &pidFileName,
195			STRING, "File to use for process ID"},
196			{"foreground", &server_state.foreground,
197			YESNO, "Run in foreground (don't detach)"},
198			{"version", &printVersion,
199			YESNO, "Print version and exit"},
200			{"help", NULL, USAGE, "Print this text"},
201			{NULL, NULL, STRING, NULL},
202			};
203
204			static void
205			io_loop(void)
206			{
207			while (1 == 1)
208			{
209			/*
210			* Maybe we want a flags word?
211			* ie. if (REHASHED_KLINES(global_flags))
212			* SET_REHASHED_KLINES(global_flags)
213			* CLEAR_REHASHED_KLINES(global_flags)
214			*
215			* - Dianora
216			*/
217			if (rehashed_klines)
218			{
219			check_conf_klines();
220			rehashed_klines = 0;
221			}
222
223			if (listing_client_list.head)
224			{
225			dlink_node ptr = NULL, ptr_next = NULL;
226			DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
227			{
228			struct Client *client_p = ptr->data;
229			assert(client_p->localClient->list_task);
230			safe_list_channels(client_p, client_p->localClient->list_task, 0, 0);
231			}
232			}
233
234			/* Run pending events, then get the number of seconds to the next
235			* event
236			*/
237			while (eventNextTime() <= CurrentTime)
238			eventRun();
239
240			comm_select();
241			exit_aborted_clients();
242			free_exited_clients();
243			send_queued_all();
244
245			/* Check to see whether we have to rehash the configuration .. */
246			if (dorehash)
247			{
248			rehash(1);
249			dorehash = 0;
250			}
251			if (doremotd)
252			{
253			read_message_file(&ConfigFileEntry.motd);
254			sendto_realops_flags(UMODE_ALL, L_ALL,
255			"Got signal SIGUSR1, reloading ircd motd file");
256			doremotd = 0;
257			}
258			}
259			}
260
261			/* initalialize_global_set_options()
262			*
263			* inputs - none
264			* output - none
265			* side effects - This sets all global set options needed
266			*/
267			static void
268			initialize_global_set_options(void)
269			{
270			memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
271
272			GlobalSetOptions.autoconn = 1;
273			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
274			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
275
276			if (ConfigFileEntry.default_floodcount)
277			GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
278			else
279			GlobalSetOptions.floodcount = 10;
280
281			/* XXX I have no idea what to try here - Dianora */
282			GlobalSetOptions.joinfloodcount = 16;
283			GlobalSetOptions.joinfloodtime = 8;
284
285			split_servers = ConfigChannel.default_split_server_count;
286			split_users = ConfigChannel.default_split_user_count;
287
288			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
289			ConfigChannel.no_join_on_split))
290			{
291			splitmode = 1;
292			splitchecking = 1;
293			}
294
295			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
296			GlobalSetOptions.idletime = ConfigFileEntry.idletime;
297			/* End of global set options */
298			}
299
300			/* initialize_message_files()
301			*
302			* inputs - none
303			* output - none
304			* side effects - Set up all message files needed, motd etc.
305			*/
306			static void
307			initialize_message_files(void)
308			{
309			init_message_file(USER_MOTD, MPATH, &ConfigFileEntry.motd);
310			init_message_file(OPER_MOTD, OPATH, &ConfigFileEntry.opermotd);
311			init_message_file(USER_LINKS, LIPATH, &ConfigFileEntry.linksfile);
312
313			read_message_file(&ConfigFileEntry.motd);
314			read_message_file(&ConfigFileEntry.opermotd);
315			read_message_file(&ConfigFileEntry.linksfile);
316
317			init_isupport();
318			}
319
320			/* initialize_server_capabs()
321			*
322			* inputs - none
323			* output - none
324			*/
325			static void
326			initialize_server_capabs(void)
327			{
328			add_capability("QS", CAP_QS, 1);
329			add_capability("LL", CAP_LL, 1);
330			add_capability("EOB", CAP_EOB, 1);
331			if (ServerInfo.sid != NULL) /* only enable TS6 if we have an SID */
332			add_capability("TS6", CAP_TS6, 0);
333			add_capability("ZIP", CAP_ZIP, 0);
334			add_capability("CLUSTER", CAP_CLUSTER, 1);
335			#ifdef HALFOPS
336			add_capability("HOPS", CAP_HOPS, 1);
337			#endif
338			}
339
340			/* write_pidfile()
341			*
342			* inputs - filename+path of pid file
343			* output - NONE
344			* side effects - write the pid of the ircd to filename
345			*/
346			static void
347			write_pidfile(const char *filename)
348			{
349			FBFILE *fb;
350
351			if ((fb = fbopen(filename, "w")))
352			{
353			char buff[32];
354			unsigned int pid = (unsigned int)getpid();
355			size_t nbytes = ircsprintf(buff, "%u\n", pid);
356
357			if ((fbputs(buff, fb, nbytes) == -1))
358			ilog(L_ERROR, "Error writing %u to pid file %s (%s)",
359			pid, filename, strerror(errno));
360
361			fbclose(fb);
362			return;
363			}
364			else
365			{
366			ilog(L_ERROR, "Error opening pid file %s", filename);
367			}
368			}
369
370			/* check_pidfile()
371			*
372			* inputs - filename+path of pid file
373			* output - none
374			* side effects - reads pid from pidfile and checks if ircd is in process
375			* list. if it is, gracefully exits
376			* -kre
377			*/
378			static void
379			check_pidfile(const char *filename)
380			{
381			#ifndef _WIN32
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			#endif
414			}
415
416			/* setup_corefile()
417			*
418			* inputs - nothing
419			* output - nothing
420			* side effects - setups corefile to system limits.
421			* -kre
422			*/
423			static void
424			setup_corefile(void)
425			{
426			#ifdef HAVE_SYS_RESOURCE_H
427			struct rlimit rlim; /* resource limits */
428
429			/* Set corefilesize to maximum */
430			if (!getrlimit(RLIMIT_CORE, &rlim))
431			{
432			rlim.rlim_cur = rlim.rlim_max;
433			setrlimit(RLIMIT_CORE, &rlim);
434			}
435			#endif
436			}
437
438			/* init_ssl()
439			*
440			* inputs - nothing
441			* output - nothing
442			* side effects - setups SSL context.
443			*/
444			static void
445			init_ssl(void)
446			{
447			#ifdef HAVE_LIBCRYPTO
448			SSL_load_error_strings();
449			SSLeay_add_ssl_algorithms();
450
451			ServerInfo.ctx = SSL_CTX_new(SSLv23_server_method());
452			if (!ServerInfo.ctx)
453			{
454			const char *s;
455
456			fprintf(stderr, "ERROR: Could not initialize the SSL context -- %s\n",
457			s = ERR_lib_error_string(ERR_get_error()));
458			ilog(L_CRIT, "ERROR: Could not initialize the SSL context -- %s\n", s);
459			}
460
461			SSL_CTX_set_options(ServerInfo.ctx, SSL_OP_NO_SSLv2);
462			SSL_CTX_set_options(ServerInfo.ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
463			SSL_CTX_set_verify(ServerInfo.ctx, SSL_VERIFY_NONE, NULL);
464
465			bio_spare_fd = save_spare_fd("SSL private key validation");
466			#endif /* HAVE_LIBCRYPTO */
467			}
468
469			/* init_callbacks()
470			*
471			* inputs - nothing
472			* output - nothing
473			* side effects - setups standard hook points
474			*/
475			static void
476			init_callbacks(void)
477			{
478			iorecv_cb = register_callback("iorecv", NULL);
479			iosend_cb = register_callback("iosend", NULL);
480			iorecvctrl_cb = register_callback("iorecvctrl", NULL);
481			iosendctrl_cb = register_callback("iosendctrl", NULL);
482			}
483
484	adx	68	static void *
485			changing_fdlimit(va_list args)
486			{
487			int old_fdlimit = hard_fdlimit;
488			int fdmax = va_arg(args, int);
489
490			/* allow MAXCLIENTS_MIN clients even at the cost of MAX_BUFFER and
491			* some not really LEAKED_FDS */
492			fdmax = IRCD_MAX(fdmax, LEAKED_FDS + MAX_BUFFER + MAXCLIENTS_MIN);
493
494			pass_callback(fdlimit_hook, fdmax);
495
496			if (ServerInfo.max_clients > MAXCLIENTS_MAX)
497			{
498			if (old_fdlimit != 0)
499			sendto_realops_flags(UMODE_ALL, L_ALL,
500			"HARD_FDLIMIT changed to %d, adjusting MAXCLIENTS to %d",
501			hard_fdlimit, MAXCLIENTS_MAX);
502
503			ServerInfo.max_clients = MAXCLIENTS_MAX;
504			}
505
506			return NULL;
507			}
508
509	adx	153	#ifdef _WIN32
510			/*
511			* Initial entry point for Win32 GUI applications, called by the C runtime.
512			*
513			* It should be only a wrapper for main(), since when compiled as a console
514			* application, main() is called instead.
515			*/
516			int WINAPI
517			WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
518			LPSTR lpCmdLine, int nCmdShow)
519			{
520			/* Do we really need these pidfile, logfile etc arguments?
521			* And we are not on a console, so -help or -foreground is meaningless. */
522
523			char *argv[2] = {"ircd", NULL};
524
525			return main(1, argv);
526			}
527			#endif
528
529	adx	30	int
530			main(int argc, char *argv[])
531			{
532			/* Check to see if the user is running
533			* us as root, which is a nono
534			*/
535			#ifndef _WIN32
536			if (geteuid() == 0)
537			{
538			fprintf(stderr, "Don't run ircd as root!!!\n");
539	adx	62	return 1;
540	adx	30	}
541
542			/* Setup corefile size immediately after boot -kre */
543			setup_corefile();
544
545			/* set initialVMTop before we allocate any memory */
546			initialVMTop = get_vm_top();
547			#endif
548
549			memset(&me, 0, sizeof(me));
550			memset(&meLocalUser, 0, sizeof(meLocalUser));
551			me.localClient = &meLocalUser;
552			dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
553			of Client list */
554
555			memset(&ServerInfo, 0, sizeof(ServerInfo));
556
557			/* Initialise the channel capability usage counts... */
558			init_chcap_usage_counts();
559
560			ConfigFileEntry.dpath = DPATH;
561			ConfigFileEntry.configfile = CPATH; /* Server configuration file */
562			ConfigFileEntry.klinefile = KPATH; /* Server kline file */
563			ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
564			ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file */
565			ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file */
566			ConfigFileEntry.dlinefile = DLPATH; /* dline file */
567			ConfigFileEntry.glinefile = GPATH; /* gline log file */
568			ConfigFileEntry.cresvfile = CRESVPATH; /* channel resv file */
569			ConfigFileEntry.nresvfile = NRESVPATH; /* nick resv file */
570			myargv = argv;
571			umask(077); /* better safe than sorry --SRB */
572
573			parseargs(&argc, &argv, myopts);
574
575			if (printVersion)
576			{
577			printf("ircd: version %s\n", ircd_version);
578			exit(EXIT_SUCCESS);
579			}
580
581			if (chdir(ConfigFileEntry.dpath))
582			{
583			perror("chdir");
584			exit(EXIT_FAILURE);
585			}
586
587			init_ssl();
588
589			#ifndef _WIN32
590			if (!server_state.foreground)
591			make_daemon();
592			else
593			print_startup(getpid());
594	adx	77	#endif
595	adx	30
596	adx	87	libio_init(!server_state.foreground);
597	adx	86	outofmemory = ircd_outofmemory;
598			fdlimit_hook = install_hook(fdlimit_cb, changing_fdlimit);
599
600	adx	30	setup_signals();
601
602			get_ircd_platform(ircd_platform);
603
604			init_log(logFileName);
605	adx	68	ServerInfo.can_use_v6 = check_can_use_v6();
606	adx	77
607	adx	30	/* Check if there is pidfile and daemon already running */
608			check_pidfile(pidFileName);
609
610			init_callbacks();
611			initialize_message_files();
612			init_hash();
613			init_ip_hash_table(); /* client host ip hash table */
614			init_host_hash(); /* Host-hashtable. */
615			clear_tree_parse();
616			init_client();
617			init_class();
618			init_whowas();
619			init_stats();
620			read_conf_files(1); /* cold start init conf files */
621			initServerMask();
622			me.id[0] = '\0';
623			init_uid();
624			init_auth(); /* Initialise the auth code */
625			initialize_server_capabs(); /* Set up default_server_capabs */
626			initialize_global_set_options();
627			init_channels();
628	adx	48	init_channel_modes();
629	adx	30
630			if (ServerInfo.name == NULL)
631			{
632			ilog(L_CRIT, "No server name specified in serverinfo block.");
633			exit(EXIT_FAILURE);
634			}
635			strlcpy(me.name, ServerInfo.name, sizeof(me.name));
636
637			/* serverinfo{} description must exist. If not, error out.*/
638			if (ServerInfo.description == NULL)
639			{
640			ilog(L_CRIT,
641			"ERROR: No server description specified in serverinfo block.");
642			exit(EXIT_FAILURE);
643			}
644			strlcpy(me.info, ServerInfo.description, sizeof(me.info));
645
646			me.from = &me;
647			me.servptr = &me;
648
649			SetMe(&me);
650			make_server(&me);
651
652			me.lasttime = me.since = me.firsttime = CurrentTime;
653			hash_add_client(&me);
654
655			/* add ourselves to global_serv_list */
656			dlinkAdd(&me, make_dlink_node(), &global_serv_list);
657
658			check_class();
659
660			#ifndef STATIC_MODULES
661			if (chdir(MODPATH))
662			{
663			ilog (L_CRIT, "Could not load core modules. Terminating!");
664			exit(EXIT_FAILURE);
665			}
666
667			load_all_modules(1);
668			load_conf_modules();
669			load_core_modules(1);
670			/* Go back to DPATH after checking to see if we can chdir to MODPATH */
671			chdir(ConfigFileEntry.dpath);
672			#else
673			load_all_modules(1);
674			#endif
675			/*
676			* assemble_umode_buffer() has to be called after
677			* reading conf/loading modules.
678			*/
679			assemble_umode_buffer();
680
681			write_pidfile(pidFileName);
682
683			ilog(L_NOTICE, "Server Ready");
684
685			eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
686			eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
687
688			/* We want try_connections to be called as soon as possible now! -- adrian */
689			/* No, 'cause after a restart it would cause all sorts of nick collides */
690			eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
691
692			eventAddIsh("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
693
694			/* Setup the timeout check. I'll shift it later :) -- adrian */
695			eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
696
697			if (ConfigServerHide.links_delay > 0)
698			eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
699			else
700			ConfigServerHide.links_disabled = 1;
701
702			if (splitmode)
703			eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
704
705			io_loop();
706			return(0);
707			}