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 "s_serv.h"      /* try_connections */
#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;
}

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();
    close_standard_fds(); /* this needs to be before init_comm()! */
  }
  else
    print_startup(getpid());
#endif

  libio_init();
  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:	86
Committed:	Wed Oct 5 20:36:04 2005 UTC (20 years, 10 months ago) by adx
Content type:	text/x-csrc
File size:	17921 byte(s)
Log Message:	* attached misc/tools.c to misc/list.c, this should really have been done earlier. * moved mem_frob() to memory.c * single libio_init() instead of all startup functions; btw, I don't know if ircd's still able to boot ..
#	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			#include "s_serv.h" /* try_connections */
46			#include "s_stats.h"
47			#include "send.h"
48			#include "whowas.h"
49			#include "modules.h"
50			#include "ircd_getopt.h"
51			#include "motd.h"
52			#include "supported.h"
53
54			/* Try and find the correct name to use with getrlimit() for setting the max.
55			* number of files allowed to be open by this process.
56			*/
57
58			/* /quote set variables */
59			struct SetOptions GlobalSetOptions;
60
61			/* configuration set from ircd.conf */
62			struct config_file_entry ConfigFileEntry;
63			/* server info set from ircd.conf */
64			struct server_info ServerInfo;
65			/* admin info set from ircd.conf */
66			struct admin_info AdminInfo = { NULL, NULL, NULL };
67			struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0 };
68			struct ServerState_t server_state = { 0 };
69			struct logging_entry ConfigLoggingEntry = { 1, {0}, {0}, {0}, {0}, {0}, {0}, {0}, {0} };
70			struct Client me; /* That's me */
71			struct LocalUser meLocalUser; /* That's also part of me */
72			unsigned long connect_id = 0; /* unique connect ID */
73
74			static unsigned long initialVMTop = 0; /* top of virtual memory at init */
75			const char *logFileName = LPATH;
76			const char *pidFileName = PPATH;
77
78			char **myargv;
79			char ircd_platform[PLATFORMLEN];
80
81			int dorehash = 0;
82			int doremotd = 0;
83			time_t nextconnect = 1; /* time for next try_connections call */
84
85			/* Set to zero because it should be initialized later using
86			* initialize_server_capabs
87			*/
88			int default_server_capabs = 0;
89
90			#ifdef HAVE_LIBCRYPTO
91			int bio_spare_fd = -1;
92			#endif
93
94			int splitmode;
95			int splitchecking;
96			int split_users;
97			unsigned int split_servers;
98
99	adx	68	static dlink_node *fdlimit_hook;
100
101	adx	30	/* Do klines the same way hybrid-6 did them, i.e. at the
102			* top of the next io_loop instead of in the same loop as
103			* the klines are being applied.
104			*
105			* This should fix strange CPU starvation as very indirectly reported.
106			* (Why do you people not email bug reports? WHY? WHY?)
107			*
108			* - Dianora
109			*/
110
111			int rehashed_klines = 0;
112
113			/*
114			* get_vm_top - get the operating systems notion of the resident set size
115			*/
116			#ifndef _WIN32
117			static unsigned long
118			get_vm_top(void)
119			{
120			/*
121			* NOTE: sbrk is not part of the ANSI C library or the POSIX.1 standard
122			* however it seems that everyone defines it. Calling sbrk with a 0
123			* argument will return a pointer to the top of the process virtual
124			* memory without changing the process size, so this call should be
125			* reasonably safe (sbrk returns the new value for the top of memory).
126			* This code relies on the notion that the address returned will be an
127			* offset from 0 (NULL), so the result of sbrk is cast to a size_t and
128			* returned. We really shouldn't be using it here but...
129			*/
130
131			void *vptr = sbrk(0);
132			return((unsigned long)vptr);
133			}
134
135			/*
136			* print_startup - print startup information
137			*/
138			static void
139			print_startup(int pid)
140			{
141			printf("ircd: version %s\n", ircd_version);
142			printf("ircd: pid %d\n", pid);
143			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
144			: "foreground", ConfigFileEntry.dpath);
145			}
146
147			static void
148			make_daemon(void)
149			{
150			int pid;
151
152			if ((pid = fork()) < 0)
153			{
154			perror("fork");
155			exit(EXIT_FAILURE);
156			}
157			else if (pid > 0)
158			{
159			print_startup(pid);
160			exit(EXIT_SUCCESS);
161			}
162
163			setsid();
164			}
165			#endif
166
167			/*
168			* get_maxrss - get the operating systems notion of the resident set size
169			*/
170			unsigned long
171			get_maxrss(void)
172			{
173			#ifdef _WIN32
174			return (0); /* FIXME */
175			#else
176			return (get_vm_top() - initialVMTop);
177			#endif
178			}
179
180			static int printVersion = 0;
181
182			struct lgetopt myopts[] = {
183			{"dlinefile", &ConfigFileEntry.dlinefile,
184			STRING, "File to use for dline.conf"},
185			{"configfile", &ConfigFileEntry.configfile,
186			STRING, "File to use for ircd.conf"},
187			{"klinefile", &ConfigFileEntry.klinefile,
188			STRING, "File to use for kline.conf"},
189			{"xlinefile", &ConfigFileEntry.xlinefile,
190			STRING, "File to use for xline.conf"},
191			{"logfile", &logFileName,
192			STRING, "File to use for ircd.log"},
193			{"pidfile", &pidFileName,
194			STRING, "File to use for process ID"},
195			{"foreground", &server_state.foreground,
196			YESNO, "Run in foreground (don't detach)"},
197			{"version", &printVersion,
198			YESNO, "Print version and exit"},
199			{"help", NULL, USAGE, "Print this text"},
200			{NULL, NULL, STRING, NULL},
201			};
202
203			static void
204			io_loop(void)
205			{
206			while (1 == 1)
207			{
208			/*
209			* Maybe we want a flags word?
210			* ie. if (REHASHED_KLINES(global_flags))
211			* SET_REHASHED_KLINES(global_flags)
212			* CLEAR_REHASHED_KLINES(global_flags)
213			*
214			* - Dianora
215			*/
216			if (rehashed_klines)
217			{
218			check_conf_klines();
219			rehashed_klines = 0;
220			}
221
222			if (listing_client_list.head)
223			{
224			dlink_node ptr = NULL, ptr_next = NULL;
225			DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
226			{
227			struct Client *client_p = ptr->data;
228			assert(client_p->localClient->list_task);
229			safe_list_channels(client_p, client_p->localClient->list_task, 0, 0);
230			}
231			}
232
233			/* Run pending events, then get the number of seconds to the next
234			* event
235			*/
236			while (eventNextTime() <= CurrentTime)
237			eventRun();
238
239			comm_select();
240			exit_aborted_clients();
241			free_exited_clients();
242			send_queued_all();
243
244			/* Check to see whether we have to rehash the configuration .. */
245			if (dorehash)
246			{
247			rehash(1);
248			dorehash = 0;
249			}
250			if (doremotd)
251			{
252			read_message_file(&ConfigFileEntry.motd);
253			sendto_realops_flags(UMODE_ALL, L_ALL,
254			"Got signal SIGUSR1, reloading ircd motd file");
255			doremotd = 0;
256			}
257			}
258			}
259
260			/* initalialize_global_set_options()
261			*
262			* inputs - none
263			* output - none
264			* side effects - This sets all global set options needed
265			*/
266			static void
267			initialize_global_set_options(void)
268			{
269			memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
270
271			GlobalSetOptions.autoconn = 1;
272			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
273			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
274
275			if (ConfigFileEntry.default_floodcount)
276			GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
277			else
278			GlobalSetOptions.floodcount = 10;
279
280			/* XXX I have no idea what to try here - Dianora */
281			GlobalSetOptions.joinfloodcount = 16;
282			GlobalSetOptions.joinfloodtime = 8;
283
284			split_servers = ConfigChannel.default_split_server_count;
285			split_users = ConfigChannel.default_split_user_count;
286
287			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
288			ConfigChannel.no_join_on_split))
289			{
290			splitmode = 1;
291			splitchecking = 1;
292			}
293
294			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
295			GlobalSetOptions.idletime = ConfigFileEntry.idletime;
296			/* End of global set options */
297			}
298
299			/* initialize_message_files()
300			*
301			* inputs - none
302			* output - none
303			* side effects - Set up all message files needed, motd etc.
304			*/
305			static void
306			initialize_message_files(void)
307			{
308			init_message_file(USER_MOTD, MPATH, &ConfigFileEntry.motd);
309			init_message_file(OPER_MOTD, OPATH, &ConfigFileEntry.opermotd);
310			init_message_file(USER_LINKS, LIPATH, &ConfigFileEntry.linksfile);
311
312			read_message_file(&ConfigFileEntry.motd);
313			read_message_file(&ConfigFileEntry.opermotd);
314			read_message_file(&ConfigFileEntry.linksfile);
315
316			init_isupport();
317			}
318
319			/* initialize_server_capabs()
320			*
321			* inputs - none
322			* output - none
323			*/
324			static void
325			initialize_server_capabs(void)
326			{
327			add_capability("QS", CAP_QS, 1);
328			add_capability("LL", CAP_LL, 1);
329			add_capability("EOB", CAP_EOB, 1);
330			if (ServerInfo.sid != NULL) /* only enable TS6 if we have an SID */
331			add_capability("TS6", CAP_TS6, 0);
332			add_capability("ZIP", CAP_ZIP, 0);
333			add_capability("CLUSTER", CAP_CLUSTER, 1);
334			#ifdef HALFOPS
335			add_capability("HOPS", CAP_HOPS, 1);
336			#endif
337			}
338
339			/* write_pidfile()
340			*
341			* inputs - filename+path of pid file
342			* output - NONE
343			* side effects - write the pid of the ircd to filename
344			*/
345			static void
346			write_pidfile(const char *filename)
347			{
348			FBFILE *fb;
349
350			if ((fb = fbopen(filename, "w")))
351			{
352			char buff[32];
353			unsigned int pid = (unsigned int)getpid();
354			size_t nbytes = ircsprintf(buff, "%u\n", pid);
355
356			if ((fbputs(buff, fb, nbytes) == -1))
357			ilog(L_ERROR, "Error writing %u to pid file %s (%s)",
358			pid, filename, strerror(errno));
359
360			fbclose(fb);
361			return;
362			}
363			else
364			{
365			ilog(L_ERROR, "Error opening pid file %s", filename);
366			}
367			}
368
369			/* check_pidfile()
370			*
371			* inputs - filename+path of pid file
372			* output - none
373			* side effects - reads pid from pidfile and checks if ircd is in process
374			* list. if it is, gracefully exits
375			* -kre
376			*/
377			static void
378			check_pidfile(const char *filename)
379			{
380			#ifndef _WIN32
381			FBFILE *fb;
382			char buff[32];
383			pid_t pidfromfile;
384
385			/* Don't do logging here, since we don't have log() initialised */
386			if ((fb = fbopen(filename, "r")))
387			{
388			if (fbgets(buff, 20, fb) == NULL)
389			{
390			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
391			* strerror(errno));
392			*/
393			}
394			else
395			{
396			pidfromfile = atoi(buff);
397
398			if (!kill(pidfromfile, 0))
399			{
400			/* log(L_ERROR, "Server is already running"); */
401			printf("ircd: daemon is already running\n");
402			exit(-1);
403			}
404			}
405
406			fbclose(fb);
407			}
408			else if (errno != ENOENT)
409			{
410			/* log(L_ERROR, "Error opening pid file %s", filename); */
411			}
412			#endif
413			}
414
415			/* setup_corefile()
416			*
417			* inputs - nothing
418			* output - nothing
419			* side effects - setups corefile to system limits.
420			* -kre
421			*/
422			static void
423			setup_corefile(void)
424			{
425			#ifdef HAVE_SYS_RESOURCE_H
426			struct rlimit rlim; /* resource limits */
427
428			/* Set corefilesize to maximum */
429			if (!getrlimit(RLIMIT_CORE, &rlim))
430			{
431			rlim.rlim_cur = rlim.rlim_max;
432			setrlimit(RLIMIT_CORE, &rlim);
433			}
434			#endif
435			}
436
437			/* init_ssl()
438			*
439			* inputs - nothing
440			* output - nothing
441			* side effects - setups SSL context.
442			*/
443			static void
444			init_ssl(void)
445			{
446			#ifdef HAVE_LIBCRYPTO
447			SSL_load_error_strings();
448			SSLeay_add_ssl_algorithms();
449
450			ServerInfo.ctx = SSL_CTX_new(SSLv23_server_method());
451			if (!ServerInfo.ctx)
452			{
453			const char *s;
454
455			fprintf(stderr, "ERROR: Could not initialize the SSL context -- %s\n",
456			s = ERR_lib_error_string(ERR_get_error()));
457			ilog(L_CRIT, "ERROR: Could not initialize the SSL context -- %s\n", s);
458			}
459
460			SSL_CTX_set_options(ServerInfo.ctx, SSL_OP_NO_SSLv2);
461			SSL_CTX_set_options(ServerInfo.ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
462			SSL_CTX_set_verify(ServerInfo.ctx, SSL_VERIFY_NONE, NULL);
463
464			bio_spare_fd = save_spare_fd("SSL private key validation");
465			#endif /* HAVE_LIBCRYPTO */
466			}
467
468			/* init_callbacks()
469			*
470			* inputs - nothing
471			* output - nothing
472			* side effects - setups standard hook points
473			*/
474			static void
475			init_callbacks(void)
476			{
477			iorecv_cb = register_callback("iorecv", NULL);
478			iosend_cb = register_callback("iosend", NULL);
479			iorecvctrl_cb = register_callback("iorecvctrl", NULL);
480			iosendctrl_cb = register_callback("iosendctrl", NULL);
481			}
482
483	adx	68	static void *
484			changing_fdlimit(va_list args)
485			{
486			int old_fdlimit = hard_fdlimit;
487			int fdmax = va_arg(args, int);
488
489			/* allow MAXCLIENTS_MIN clients even at the cost of MAX_BUFFER and
490			* some not really LEAKED_FDS */
491			fdmax = IRCD_MAX(fdmax, LEAKED_FDS + MAX_BUFFER + MAXCLIENTS_MIN);
492
493			pass_callback(fdlimit_hook, fdmax);
494
495			if (ServerInfo.max_clients > MAXCLIENTS_MAX)
496			{
497			if (old_fdlimit != 0)
498			sendto_realops_flags(UMODE_ALL, L_ALL,
499			"HARD_FDLIMIT changed to %d, adjusting MAXCLIENTS to %d",
500			hard_fdlimit, MAXCLIENTS_MAX);
501
502			ServerInfo.max_clients = MAXCLIENTS_MAX;
503			}
504
505			return NULL;
506			}
507
508	adx	30	int
509			main(int argc, char *argv[])
510			{
511			/* Check to see if the user is running
512			* us as root, which is a nono
513			*/
514			#ifndef _WIN32
515			if (geteuid() == 0)
516			{
517			fprintf(stderr, "Don't run ircd as root!!!\n");
518	adx	62	return 1;
519	adx	30	}
520
521			/* Setup corefile size immediately after boot -kre */
522			setup_corefile();
523
524			/* set initialVMTop before we allocate any memory */
525			initialVMTop = get_vm_top();
526			#endif
527
528			memset(&me, 0, sizeof(me));
529			memset(&meLocalUser, 0, sizeof(meLocalUser));
530			me.localClient = &meLocalUser;
531			dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
532			of Client list */
533
534			memset(&ServerInfo, 0, sizeof(ServerInfo));
535
536			/* Initialise the channel capability usage counts... */
537			init_chcap_usage_counts();
538
539			ConfigFileEntry.dpath = DPATH;
540			ConfigFileEntry.configfile = CPATH; /* Server configuration file */
541			ConfigFileEntry.klinefile = KPATH; /* Server kline file */
542			ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
543			ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file */
544			ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file */
545			ConfigFileEntry.dlinefile = DLPATH; /* dline file */
546			ConfigFileEntry.glinefile = GPATH; /* gline log file */
547			ConfigFileEntry.cresvfile = CRESVPATH; /* channel resv file */
548			ConfigFileEntry.nresvfile = NRESVPATH; /* nick resv file */
549			myargv = argv;
550			umask(077); /* better safe than sorry --SRB */
551
552			parseargs(&argc, &argv, myopts);
553
554			if (printVersion)
555			{
556			printf("ircd: version %s\n", ircd_version);
557			exit(EXIT_SUCCESS);
558			}
559
560			if (chdir(ConfigFileEntry.dpath))
561			{
562			perror("chdir");
563			exit(EXIT_FAILURE);
564			}
565
566			init_ssl();
567
568			#ifndef _WIN32
569			if (!server_state.foreground)
570			{
571			make_daemon();
572	adx	77	close_standard_fds(); /* this needs to be before init_comm()! */
573	adx	30	}
574			else
575			print_startup(getpid());
576	adx	77	#endif
577	adx	30
578	adx	86	libio_init();
579			outofmemory = ircd_outofmemory;
580			fdlimit_hook = install_hook(fdlimit_cb, changing_fdlimit);
581
582	adx	30	setup_signals();
583
584			get_ircd_platform(ircd_platform);
585
586			init_log(logFileName);
587	adx	68	ServerInfo.can_use_v6 = check_can_use_v6();
588	adx	77
589	adx	30	/* Check if there is pidfile and daemon already running */
590			check_pidfile(pidFileName);
591
592			init_callbacks();
593			initialize_message_files();
594			init_hash();
595			init_ip_hash_table(); /* client host ip hash table */
596			init_host_hash(); /* Host-hashtable. */
597			clear_tree_parse();
598			init_client();
599			init_class();
600			init_whowas();
601			init_stats();
602			read_conf_files(1); /* cold start init conf files */
603			initServerMask();
604			me.id[0] = '\0';
605			init_uid();
606			init_auth(); /* Initialise the auth code */
607			initialize_server_capabs(); /* Set up default_server_capabs */
608			initialize_global_set_options();
609			init_channels();
610	adx	48	init_channel_modes();
611	adx	30
612			if (ServerInfo.name == NULL)
613			{
614			ilog(L_CRIT, "No server name specified in serverinfo block.");
615			exit(EXIT_FAILURE);
616			}
617			strlcpy(me.name, ServerInfo.name, sizeof(me.name));
618
619			/* serverinfo{} description must exist. If not, error out.*/
620			if (ServerInfo.description == NULL)
621			{
622			ilog(L_CRIT,
623			"ERROR: No server description specified in serverinfo block.");
624			exit(EXIT_FAILURE);
625			}
626			strlcpy(me.info, ServerInfo.description, sizeof(me.info));
627
628			me.from = &me;
629			me.servptr = &me;
630
631			SetMe(&me);
632			make_server(&me);
633
634			me.lasttime = me.since = me.firsttime = CurrentTime;
635			hash_add_client(&me);
636
637			/* add ourselves to global_serv_list */
638			dlinkAdd(&me, make_dlink_node(), &global_serv_list);
639
640			check_class();
641
642			#ifndef STATIC_MODULES
643			if (chdir(MODPATH))
644			{
645			ilog (L_CRIT, "Could not load core modules. Terminating!");
646			exit(EXIT_FAILURE);
647			}
648
649			load_all_modules(1);
650			load_conf_modules();
651			load_core_modules(1);
652			/* Go back to DPATH after checking to see if we can chdir to MODPATH */
653			chdir(ConfigFileEntry.dpath);
654			#else
655			load_all_modules(1);
656			#endif
657			/*
658			* assemble_umode_buffer() has to be called after
659			* reading conf/loading modules.
660			*/
661			assemble_umode_buffer();
662
663			write_pidfile(pidFileName);
664
665			ilog(L_NOTICE, "Server Ready");
666
667			eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
668			eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
669
670			/* We want try_connections to be called as soon as possible now! -- adrian */
671			/* No, 'cause after a restart it would cause all sorts of nick collides */
672			eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
673
674			eventAddIsh("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
675
676			/* Setup the timeout check. I'll shift it later :) -- adrian */
677			eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
678
679			if (ConfigServerHide.links_delay > 0)
680			eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
681			else
682			ConfigServerHide.links_disabled = 1;
683
684			if (splitmode)
685			eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
686
687			io_loop();
688			return(0);
689			}