trunk/src/ircd.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  ircd.c: Starts up and runs the ircd.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id$
 */

#include "stdinc.h"
#include "s_user.h"
#include "list.h"
#include "ircd.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "event.h"
#include "fdlist.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd_signal.h"
#include "s_gline.h"
#include "motd.h"
#include "hostmask.h"
#include "numeric.h"
#include "packet.h"
#include "parse.h"
#include "irc_res.h"
#include "restart.h"
#include "rng_mt.h"
#include "s_auth.h"
#include "s_bsd.h"
#include "s_conf.h"
#include "s_log.h"
#include "s_misc.h"
#include "s_serv.h"      /* try_connections */
#include "send.h"
#include "whowas.h"
#include "modules.h"
#include "memory.h"
#include "hook.h"
#include "ircd_getopt.h"
#include "balloc.h"
#include "motd.h"
#include "supported.h"
#include "watch.h"


/* /quote set variables */
struct SetOptions GlobalSetOptions;

/* configuration set from ircd.conf */
struct config_file_entry ConfigFileEntry; 
/* server info set from ircd.conf */
struct server_info ServerInfo;
/* admin info set from ircd.conf */
struct admin_info AdminInfo = { NULL, NULL, NULL };
struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
struct ServerState_t server_state = { 0 };
struct logging_entry ConfigLoggingEntry = { 1, 1 };
struct ServerStatistics ServerStats;
struct timeval SystemTime;
struct Client me;             /* That's me */
struct LocalUser meLocalUser; /* That's also part of me */

const char *logFileName = LPATH;
const char *pidFileName = PPATH;

char **myargv;
char ircd_platform[PLATFORMLEN];

int dorehash = 0;
int doremotd = 0;

/* Set to zero because it should be initialized later using
 * initialize_server_capabs
 */
int default_server_capabs = 0;

#ifdef HAVE_LIBCRYPTO
int bio_spare_fd = -1;
#endif

unsigned int splitmode;
unsigned int splitchecking;
unsigned int split_users;
unsigned int split_servers;

/* Do klines the same way hybrid-6 did them, i.e. at the
 * top of the next io_loop instead of in the same loop as
 * the klines are being applied.
 *
 * This should fix strange CPU starvation as very indirectly reported.
 * (Why do you people not email bug reports? WHY? WHY?)
 *
 * - Dianora
 */

int rehashed_klines = 0;


/*
 * print_startup - print startup information
 */
static void
print_startup(int pid)
{
  printf("ircd: version %s\n", ircd_version);
  printf("ircd: pid %d\n", pid);
  printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
         : "foreground", ConfigFileEntry.dpath);
}

static void
make_daemon(void)
{
  int pid;

  if ((pid = fork()) < 0)
  {
    perror("fork");
    exit(EXIT_FAILURE);
  }
  else if (pid > 0)
  {
    print_startup(pid);
    exit(EXIT_SUCCESS);
  }

  setsid();
}

static int printVersion = 0;

struct lgetopt myopts[] = {
  {"dlinefile",  &ConfigFileEntry.dlinefile, 
   STRING, "File to use for dline.conf"},
  {"configfile", &ConfigFileEntry.configfile, 
   STRING, "File to use for ircd.conf"},
  {"klinefile",  &ConfigFileEntry.klinefile, 
   STRING, "File to use for kline.conf"},
  {"xlinefile",  &ConfigFileEntry.xlinefile, 
   STRING, "File to use for xline.conf"},
  {"logfile",    &logFileName, 
   STRING, "File to use for ircd.log"},
  {"pidfile",    &pidFileName,
   STRING, "File to use for process ID"},
  {"foreground", &server_state.foreground, 
   YESNO, "Run in foreground (don't detach)"},
  {"version",    &printVersion, 
   YESNO, "Print version and exit"},
  {"help", NULL, USAGE, "Print this text"},
  {NULL, NULL, STRING, NULL},
};

void
set_time(void)
{
  static char to_send[200];
  struct timeval newtime;
  newtime.tv_sec  = 0;
  newtime.tv_usec = 0;

  if (gettimeofday(&newtime, NULL) == -1)
  {
    ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
         strerror(errno));
    sendto_realops_flags(UMODE_ALL, L_ALL,
                         "Clock Failure (%s), TS can be corrupted",
                         strerror(errno));
    restart("Clock Failure");
  }

  if (newtime.tv_sec < CurrentTime)
  {
    snprintf(to_send, sizeof(to_send),
             "System clock is running backwards - (%lu < %lu)",
             (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
    report_error(L_ALL, to_send, me.name, 0);
    set_back_events(CurrentTime - newtime.tv_sec);
  }

  SystemTime.tv_sec  = newtime.tv_sec;
  SystemTime.tv_usec = newtime.tv_usec;
}

static void
io_loop(void)
{
  while (1 == 1)
  {
    /*
     * Maybe we want a flags word?
     * ie. if (REHASHED_KLINES(global_flags)) 
     * SET_REHASHED_KLINES(global_flags)
     * CLEAR_REHASHED_KLINES(global_flags)
     *
     * - Dianora
     */
    if (rehashed_klines)
    {
      check_conf_klines();
      rehashed_klines = 0;
    }

    if (listing_client_list.head)
    {
      dlink_node *ptr = NULL, *ptr_next = NULL;
      DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
      {
        struct Client *client_p = ptr->data;
        assert(client_p->localClient->list_task);
        safe_list_channels(client_p, client_p->localClient->list_task, 0);
      }
    }

    /* Run pending events, then get the number of seconds to the next
     * event
     */
    while (eventNextTime() <= CurrentTime)
      eventRun();

    comm_select();
    exit_aborted_clients();
    free_exited_clients();
    send_queued_all();

    /* Check to see whether we have to rehash the configuration .. */
    if (dorehash)
    {
      rehash(1);
      dorehash = 0;
    }
    if (doremotd)
    {
      read_message_file(&ConfigFileEntry.motd);
      sendto_realops_flags(UMODE_ALL, L_ALL,
                           "Got signal SIGUSR1, reloading ircd motd file");
      doremotd = 0;
    }
  }
}

/* initalialize_global_set_options()
 *
 * inputs       - none
 * output       - none
 * side effects - This sets all global set options needed 
 */
static void
initialize_global_set_options(void)
{
  memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));

  GlobalSetOptions.autoconn  = 1;
  GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
  GlobalSetOptions.spam_num  = MAX_JOIN_LEAVE_COUNT;

  if (ConfigFileEntry.default_floodcount)
    GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
  else
    GlobalSetOptions.floodcount = 10;

  /* XXX I have no idea what to try here - Dianora */
  GlobalSetOptions.joinfloodcount = 16;
  GlobalSetOptions.joinfloodtime = 8;

  split_servers = ConfigChannel.default_split_server_count;
  split_users   = ConfigChannel.default_split_user_count;

  if (split_users && split_servers && (ConfigChannel.no_create_on_split ||
                                       ConfigChannel.no_join_on_split))
  {
    splitmode     = 1;
    splitchecking = 1;
  }

  GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
  /* End of global set options */
}

/* initialize_message_files()
 *
 * inputs       - none
 * output       - none
 * side effects - Set up all message files needed, motd etc.
 */
static void
initialize_message_files(void)
{
  init_message_file(USER_MOTD, MPATH, &ConfigFileEntry.motd);
  init_message_file(OPER_MOTD, OPATH, &ConfigFileEntry.opermotd);
  init_message_file(USER_LINKS, LIPATH, &ConfigFileEntry.linksfile);

  read_message_file(&ConfigFileEntry.motd);
  read_message_file(&ConfigFileEntry.opermotd);
  read_message_file(&ConfigFileEntry.linksfile);

  init_isupport();
}

/* initialize_server_capabs()
 *
 * inputs       - none
 * output       - none
 */
static void
initialize_server_capabs(void)
{
  add_capability("QS", CAP_QS, 1);
  add_capability("EOB", CAP_EOB, 1);
  add_capability("TS6", CAP_TS6, 0);
  add_capability("CLUSTER", CAP_CLUSTER, 1);
  add_capability("SVS", CAP_SVS, 1);
#ifdef HALFOPS
  add_capability("HOPS", CAP_HOPS, 1);
#endif
}

/* write_pidfile()
 *
 * inputs       - filename+path of pid file
 * output       - NONE
 * side effects - write the pid of the ircd to filename
 */
static void
write_pidfile(const char *filename)
{
  FBFILE *fb;

  if ((fb = fbopen(filename, "w")))
  {
    char buff[32];
    unsigned int pid = (unsigned int)getpid();
    size_t nbytes = snprintf(buff, sizeof(buff), "%u\n", pid);

    if ((fbputs(buff, fb, nbytes) == -1))
      ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
           pid, filename, strerror(errno));

    fbclose(fb);
    return;
  }
  else
  {
    ilog(LOG_TYPE_IRCD, "Error opening pid file %s", filename);
  }
}

/* check_pidfile()
 *
 * inputs       - filename+path of pid file
 * output       - none
 * side effects - reads pid from pidfile and checks if ircd is in process
 *                list. if it is, gracefully exits
 * -kre
 */
static void
check_pidfile(const char *filename)
{
  FBFILE *fb;
  char buff[32];
  pid_t pidfromfile;

  /* Don't do logging here, since we don't have log() initialised */
  if ((fb = fbopen(filename, "r")))
  {
    if (fbgets(buff, 20, fb) == NULL)
    {
      /* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
       * strerror(errno));
       */
    }
    else
    {
      pidfromfile = atoi(buff);

      if (!kill(pidfromfile, 0))
      {
        /* log(L_ERROR, "Server is already running"); */
        printf("ircd: daemon is already running\n");
        exit(-1);
      }
    }

    fbclose(fb);
  }
  else if (errno != ENOENT)
  {
    /* log(L_ERROR, "Error opening pid file %s", filename); */
  }
}

/* setup_corefile()
 *
 * inputs       - nothing
 * output       - nothing
 * side effects - setups corefile to system limits.
 * -kre
 */
static void
setup_corefile(void)
{
#ifdef HAVE_SYS_RESOURCE_H
  struct rlimit rlim; /* resource limits */

  /* Set corefilesize to maximum */
  if (!getrlimit(RLIMIT_CORE, &rlim))
  {
    rlim.rlim_cur = rlim.rlim_max;
    setrlimit(RLIMIT_CORE, &rlim);
  }
#endif
}

/* init_ssl()
 *
 * inputs       - nothing
 * output       - nothing
 * side effects - setups SSL context.
 */
static void
init_ssl(void)
{
#ifdef HAVE_LIBCRYPTO
  SSL_load_error_strings();
  SSLeay_add_ssl_algorithms();

  if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
  {
    const char *s;

    fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n",
            s = ERR_lib_error_string(ERR_get_error()));
    ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
  }

  SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2);
  SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
  SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_NONE, NULL);

  if ((ServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
  {
    const char *s;

    fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n",
            s = ERR_lib_error_string(ERR_get_error()));
    ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
  }

  SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_NO_SSLv2);
  SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
  SSL_CTX_set_verify(ServerInfo.client_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);
}

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

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

  /* save server boot time right away, so getrusage works correctly */
  set_time();

  /* It ain't random, but it ought to be a little harder to guess */
  init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));

  me.localClient = &meLocalUser;
  dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
                                                   of Client list */
  /* Initialise the channel capability usage counts... */
  init_chcap_usage_counts();

  ConfigFileEntry.dpath      = DPATH;
  ConfigFileEntry.configfile = CPATH;  /* Server configuration file */
  ConfigFileEntry.klinefile  = KPATH;  /* Server kline file         */
  ConfigFileEntry.xlinefile  = XPATH;  /* Server xline file         */
  ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file   */
  ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file   */
  ConfigFileEntry.dlinefile  = DLPATH; /* dline file                */
  ConfigFileEntry.glinefile  = GPATH;  /* gline log file            */
  ConfigFileEntry.cresvfile  = CRESVPATH; /* channel resv file      */
  ConfigFileEntry.nresvfile  = NRESVPATH; /* nick resv file         */
  myargv = argv;
  umask(077);                /* better safe than sorry --SRB */

  parseargs(&argc, &argv, myopts);

  if (printVersion)
  {
    printf("ircd: version %s\n", ircd_version);
    exit(EXIT_SUCCESS);
  }

  if (chdir(ConfigFileEntry.dpath))
  {
    perror("chdir");
    exit(EXIT_FAILURE);
  }

  init_ssl();

  if (!server_state.foreground)
  {
    make_daemon();
    close_standard_fds(); /* this needs to be before init_netio()! */
  }
  else
    print_startup(getpid());

  setup_signals();

  get_ircd_platform(ircd_platform);

  /* Init the event subsystem */
  eventInit();
  /* We need this to initialise the fd array before anything else */
  fdlist_init();
  log_add_file(LOG_TYPE_IRCD, 0, logFileName);
  check_can_use_v6();
  init_comm();         /* This needs to be setup early ! -- adrian */
  /* Check if there is pidfile and daemon already running */
  check_pidfile(pidFileName);

  initBlockHeap();
  init_dlink_nodes();
  init_callbacks();
  initialize_message_files();
  dbuf_init();
  init_hash();
  init_ip_hash_table();      /* client host ip hash table */
  init_host_hash();          /* Host-hashtable. */
  clear_tree_parse();
  init_client();
  init_class();
  init_whowas();
  watch_init();
  init_auth();          /* Initialise the auth code */
  init_resolver();      /* Needs to be setup before the io loop */
  read_conf_files(1);   /* cold start init conf files */
  init_uid();
  initialize_server_capabs();   /* Set up default_server_capabs */
  initialize_global_set_options();
  init_channels();

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

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

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

  strlcpy(me.name, ServerInfo.name, sizeof(me.name));

  /* serverinfo{} description must exist.  If not, error out.*/
  if (EmptyString(ServerInfo.description))
  {
    ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
    exit(EXIT_FAILURE);
  }

  strlcpy(me.info, ServerInfo.description, sizeof(me.info));

  me.from                   = &me;
  me.servptr                = &me;
  me.localClient->lasttime  = CurrentTime;
  me.localClient->since     = CurrentTime;
  me.localClient->firsttime = CurrentTime;

  SetMe(&me);
  make_server(&me);

  hash_add_id(&me);
  hash_add_client(&me);
  
  /* add ourselves to global_serv_list */
  dlinkAdd(&me, make_dlink_node(), &global_serv_list);

  if (chdir(MODPATH))
  {
    ilog(LOG_TYPE_IRCD, "Could not load core modules. Terminating!");
    exit(EXIT_FAILURE);
  }

  load_all_modules(1);
  load_conf_modules();
  load_core_modules(1);

  /* Go back to DPATH after checking to see if we can chdir to MODPATH */
  if (chdir(ConfigFileEntry.dpath))
  {
    perror("chdir");
    exit(EXIT_FAILURE);
  }

  /*
   * assemble_umode_buffer() has to be called after
   * reading conf/loading modules.
   */
  assemble_umode_buffer();

  write_pidfile(pidFileName);

  ilog(LOG_TYPE_IRCD, "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);

  /* 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:	1303
Committed:	Fri Mar 23 10:52:19 2012 UTC (13 years, 5 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/src/ircd.c*
File size:	17721 byte(s)
Log Message:	- Implement basic tls connections for server-server links
#	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	michael	1011	#include "list.h"
28	adx	30	#include "ircd.h"
29			#include "channel.h"
30			#include "channel_mode.h"
31			#include "client.h"
32			#include "event.h"
33			#include "fdlist.h"
34			#include "hash.h"
35			#include "irc_string.h"
36			#include "ircd_signal.h"
37			#include "s_gline.h"
38			#include "motd.h"
39			#include "hostmask.h"
40			#include "numeric.h"
41			#include "packet.h"
42			#include "parse.h"
43			#include "irc_res.h"
44			#include "restart.h"
45	michael	982	#include "rng_mt.h"
46	adx	30	#include "s_auth.h"
47			#include "s_bsd.h"
48			#include "s_conf.h"
49			#include "s_log.h"
50			#include "s_misc.h"
51			#include "s_serv.h" /* try_connections */
52			#include "send.h"
53			#include "whowas.h"
54			#include "modules.h"
55			#include "memory.h"
56			#include "hook.h"
57			#include "ircd_getopt.h"
58			#include "balloc.h"
59			#include "motd.h"
60			#include "supported.h"
61	michael	876	#include "watch.h"
62	adx	30
63
64			/* /quote set variables */
65			struct SetOptions GlobalSetOptions;
66
67			/* configuration set from ircd.conf */
68			struct config_file_entry ConfigFileEntry;
69			/* server info set from ircd.conf */
70			struct server_info ServerInfo;
71			/* admin info set from ircd.conf */
72			struct admin_info AdminInfo = { NULL, NULL, NULL };
73	michael	1145	struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
74	adx	30	struct ServerState_t server_state = { 0 };
75	michael	1286	struct logging_entry ConfigLoggingEntry = { 1, 1 };
76	michael	896	struct ServerStatistics ServerStats;
77	adx	30	struct timeval SystemTime;
78			struct Client me; /* That's me */
79			struct LocalUser meLocalUser; /* That's also part of me */
80
81			const char *logFileName = LPATH;
82			const char *pidFileName = PPATH;
83
84			char **myargv;
85			char ircd_platform[PLATFORMLEN];
86
87			int dorehash = 0;
88			int doremotd = 0;
89
90			/* Set to zero because it should be initialized later using
91			* initialize_server_capabs
92			*/
93			int default_server_capabs = 0;
94
95			#ifdef HAVE_LIBCRYPTO
96			int bio_spare_fd = -1;
97			#endif
98
99	michael	1013	unsigned int splitmode;
100			unsigned int splitchecking;
101			unsigned int split_users;
102	adx	30	unsigned int split_servers;
103
104			/* Do klines the same way hybrid-6 did them, i.e. at the
105			* top of the next io_loop instead of in the same loop as
106			* the klines are being applied.
107			*
108			* This should fix strange CPU starvation as very indirectly reported.
109			* (Why do you people not email bug reports? WHY? WHY?)
110			*
111			* - Dianora
112			*/
113
114			int rehashed_klines = 0;
115
116
117			/*
118			* print_startup - print startup information
119			*/
120			static void
121			print_startup(int pid)
122			{
123			printf("ircd: version %s\n", ircd_version);
124			printf("ircd: pid %d\n", pid);
125			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
126			: "foreground", ConfigFileEntry.dpath);
127			}
128
129			static void
130			make_daemon(void)
131			{
132			int pid;
133
134			if ((pid = fork()) < 0)
135			{
136			perror("fork");
137			exit(EXIT_FAILURE);
138			}
139			else if (pid > 0)
140			{
141			print_startup(pid);
142			exit(EXIT_SUCCESS);
143			}
144
145			setsid();
146			}
147
148			static int printVersion = 0;
149
150			struct lgetopt myopts[] = {
151			{"dlinefile", &ConfigFileEntry.dlinefile,
152			STRING, "File to use for dline.conf"},
153			{"configfile", &ConfigFileEntry.configfile,
154			STRING, "File to use for ircd.conf"},
155			{"klinefile", &ConfigFileEntry.klinefile,
156			STRING, "File to use for kline.conf"},
157			{"xlinefile", &ConfigFileEntry.xlinefile,
158			STRING, "File to use for xline.conf"},
159			{"logfile", &logFileName,
160			STRING, "File to use for ircd.log"},
161			{"pidfile", &pidFileName,
162			STRING, "File to use for process ID"},
163			{"foreground", &server_state.foreground,
164			YESNO, "Run in foreground (don't detach)"},
165			{"version", &printVersion,
166			YESNO, "Print version and exit"},
167			{"help", NULL, USAGE, "Print this text"},
168			{NULL, NULL, STRING, NULL},
169			};
170
171			void
172			set_time(void)
173			{
174			static char to_send[200];
175			struct timeval newtime;
176			newtime.tv_sec = 0;
177			newtime.tv_usec = 0;
178
179			if (gettimeofday(&newtime, NULL) == -1)
180			{
181	michael	1247	ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
182	adx	30	strerror(errno));
183			sendto_realops_flags(UMODE_ALL, L_ALL,
184			"Clock Failure (%s), TS can be corrupted",
185			strerror(errno));
186			restart("Clock Failure");
187			}
188
189			if (newtime.tv_sec < CurrentTime)
190			{
191	michael	1124	snprintf(to_send, sizeof(to_send),
192			"System clock is running backwards - (%lu < %lu)",
193			(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
194	adx	30	report_error(L_ALL, to_send, me.name, 0);
195			set_back_events(CurrentTime - newtime.tv_sec);
196			}
197
198			SystemTime.tv_sec = newtime.tv_sec;
199			SystemTime.tv_usec = newtime.tv_usec;
200			}
201
202			static void
203			io_loop(void)
204			{
205			while (1 == 1)
206			{
207			/*
208			* Maybe we want a flags word?
209			* ie. if (REHASHED_KLINES(global_flags))
210			* SET_REHASHED_KLINES(global_flags)
211			* CLEAR_REHASHED_KLINES(global_flags)
212			*
213			* - Dianora
214			*/
215			if (rehashed_klines)
216			{
217			check_conf_klines();
218			rehashed_klines = 0;
219			}
220
221			if (listing_client_list.head)
222			{
223			dlink_node ptr = NULL, ptr_next = NULL;
224			DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
225			{
226			struct Client *client_p = ptr->data;
227			assert(client_p->localClient->list_task);
228	michael	896	safe_list_channels(client_p, client_p->localClient->list_task, 0);
229	adx	30	}
230			}
231
232			/* Run pending events, then get the number of seconds to the next
233			* event
234			*/
235			while (eventNextTime() <= CurrentTime)
236			eventRun();
237
238			comm_select();
239			exit_aborted_clients();
240			free_exited_clients();
241			send_queued_all();
242
243			/* Check to see whether we have to rehash the configuration .. */
244			if (dorehash)
245			{
246			rehash(1);
247			dorehash = 0;
248			}
249			if (doremotd)
250			{
251			read_message_file(&ConfigFileEntry.motd);
252			sendto_realops_flags(UMODE_ALL, L_ALL,
253			"Got signal SIGUSR1, reloading ircd motd file");
254			doremotd = 0;
255			}
256			}
257			}
258
259			/* initalialize_global_set_options()
260			*
261			* inputs - none
262			* output - none
263			* side effects - This sets all global set options needed
264			*/
265			static void
266			initialize_global_set_options(void)
267			{
268			memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
269
270			GlobalSetOptions.autoconn = 1;
271			GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
272			GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
273
274			if (ConfigFileEntry.default_floodcount)
275			GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
276			else
277			GlobalSetOptions.floodcount = 10;
278
279			/* XXX I have no idea what to try here - Dianora */
280			GlobalSetOptions.joinfloodcount = 16;
281			GlobalSetOptions.joinfloodtime = 8;
282
283			split_servers = ConfigChannel.default_split_server_count;
284			split_users = ConfigChannel.default_split_user_count;
285
286			if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
287			ConfigChannel.no_join_on_split))
288			{
289			splitmode = 1;
290			splitchecking = 1;
291			}
292
293			GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
294			/* End of global set options */
295			}
296
297			/* initialize_message_files()
298			*
299			* inputs - none
300			* output - none
301			* side effects - Set up all message files needed, motd etc.
302			*/
303			static void
304			initialize_message_files(void)
305			{
306			init_message_file(USER_MOTD, MPATH, &ConfigFileEntry.motd);
307			init_message_file(OPER_MOTD, OPATH, &ConfigFileEntry.opermotd);
308			init_message_file(USER_LINKS, LIPATH, &ConfigFileEntry.linksfile);
309
310			read_message_file(&ConfigFileEntry.motd);
311			read_message_file(&ConfigFileEntry.opermotd);
312			read_message_file(&ConfigFileEntry.linksfile);
313
314			init_isupport();
315			}
316
317			/* initialize_server_capabs()
318			*
319			* inputs - none
320			* output - none
321			*/
322			static void
323			initialize_server_capabs(void)
324			{
325			add_capability("QS", CAP_QS, 1);
326			add_capability("EOB", CAP_EOB, 1);
327	michael	1117	add_capability("TS6", CAP_TS6, 0);
328	adx	30	add_capability("CLUSTER", CAP_CLUSTER, 1);
329	michael	1196	add_capability("SVS", CAP_SVS, 1);
330	adx	30	#ifdef HALFOPS
331			add_capability("HOPS", CAP_HOPS, 1);
332			#endif
333			}
334
335			/* write_pidfile()
336			*
337			* inputs - filename+path of pid file
338			* output - NONE
339			* side effects - write the pid of the ircd to filename
340			*/
341			static void
342			write_pidfile(const char *filename)
343			{
344			FBFILE *fb;
345
346			if ((fb = fbopen(filename, "w")))
347			{
348			char buff[32];
349			unsigned int pid = (unsigned int)getpid();
350	michael	1124	size_t nbytes = snprintf(buff, sizeof(buff), "%u\n", pid);
351	adx	30
352			if ((fbputs(buff, fb, nbytes) == -1))
353	michael	1247	ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
354	adx	30	pid, filename, strerror(errno));
355
356			fbclose(fb);
357			return;
358			}
359			else
360			{
361	michael	1247	ilog(LOG_TYPE_IRCD, "Error opening pid file %s", filename);
362	adx	30	}
363			}
364
365			/* check_pidfile()
366			*
367			* inputs - filename+path of pid file
368			* output - none
369			* side effects - reads pid from pidfile and checks if ircd is in process
370			* list. if it is, gracefully exits
371			* -kre
372			*/
373			static void
374			check_pidfile(const char *filename)
375			{
376			FBFILE *fb;
377			char buff[32];
378			pid_t pidfromfile;
379
380			/* Don't do logging here, since we don't have log() initialised */
381			if ((fb = fbopen(filename, "r")))
382			{
383			if (fbgets(buff, 20, fb) == NULL)
384			{
385			/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
386			* strerror(errno));
387			*/
388			}
389			else
390			{
391			pidfromfile = atoi(buff);
392
393			if (!kill(pidfromfile, 0))
394			{
395			/* log(L_ERROR, "Server is already running"); */
396			printf("ircd: daemon is already running\n");
397			exit(-1);
398			}
399			}
400
401			fbclose(fb);
402			}
403			else if (errno != ENOENT)
404			{
405			/* log(L_ERROR, "Error opening pid file %s", filename); */
406			}
407			}
408
409			/* setup_corefile()
410			*
411			* inputs - nothing
412			* output - nothing
413			* side effects - setups corefile to system limits.
414			* -kre
415			*/
416			static void
417			setup_corefile(void)
418			{
419			#ifdef HAVE_SYS_RESOURCE_H
420			struct rlimit rlim; /* resource limits */
421
422			/* Set corefilesize to maximum */
423			if (!getrlimit(RLIMIT_CORE, &rlim))
424			{
425			rlim.rlim_cur = rlim.rlim_max;
426			setrlimit(RLIMIT_CORE, &rlim);
427			}
428			#endif
429			}
430
431			/* init_ssl()
432			*
433			* inputs - nothing
434			* output - nothing
435			* side effects - setups SSL context.
436			*/
437			static void
438			init_ssl(void)
439			{
440			#ifdef HAVE_LIBCRYPTO
441			SSL_load_error_strings();
442			SSLeay_add_ssl_algorithms();
443
444	michael	967	if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
445	adx	30	{
446			const char *s;
447
448	michael	1303	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n",
449	adx	30	s = ERR_lib_error_string(ERR_get_error()));
450	michael	1303	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
451	adx	30	}
452
453	michael	967	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2);
454			SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
455			SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_NONE, NULL);
456	adx	30
457	michael	1303	if ((ServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
458			{
459			const char *s;
460
461			fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n",
462			s = ERR_lib_error_string(ERR_get_error()));
463			ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
464			}
465
466			SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_NO_SSLv2);
467			SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
468			SSL_CTX_set_verify(ServerInfo.client_ctx, SSL_VERIFY_NONE, NULL);
469
470	adx	30	bio_spare_fd = save_spare_fd("SSL private key validation");
471			#endif /* HAVE_LIBCRYPTO */
472			}
473
474			/* init_callbacks()
475			*
476			* inputs - nothing
477			* output - nothing
478			* side effects - setups standard hook points
479			*/
480			static void
481			init_callbacks(void)
482			{
483	adx	163	iorecv_cb = register_callback("iorecv", iorecv_default);
484			iosend_cb = register_callback("iosend", iosend_default);
485	adx	30	}
486
487			int
488			main(int argc, char *argv[])
489			{
490			/* Check to see if the user is running
491			* us as root, which is a nono
492			*/
493			if (geteuid() == 0)
494			{
495			fprintf(stderr, "Don't run ircd as root!!!\n");
496	michael	982	return -1;
497	adx	30	}
498
499			/* Setup corefile size immediately after boot -kre */
500			setup_corefile();
501
502			/* save server boot time right away, so getrusage works correctly */
503			set_time();
504
505	michael	982	/* It ain't random, but it ought to be a little harder to guess */
506			init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
507
508	adx	30	me.localClient = &meLocalUser;
509			dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
510			of Client list */
511			/* Initialise the channel capability usage counts... */
512			init_chcap_usage_counts();
513
514			ConfigFileEntry.dpath = DPATH;
515			ConfigFileEntry.configfile = CPATH; /* Server configuration file */
516			ConfigFileEntry.klinefile = KPATH; /* Server kline file */
517			ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
518			ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file */
519			ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file */
520			ConfigFileEntry.dlinefile = DLPATH; /* dline file */
521			ConfigFileEntry.glinefile = GPATH; /* gline log file */
522			ConfigFileEntry.cresvfile = CRESVPATH; /* channel resv file */
523			ConfigFileEntry.nresvfile = NRESVPATH; /* nick resv file */
524			myargv = argv;
525			umask(077); /* better safe than sorry --SRB */
526
527			parseargs(&argc, &argv, myopts);
528
529			if (printVersion)
530			{
531			printf("ircd: version %s\n", ircd_version);
532			exit(EXIT_SUCCESS);
533			}
534
535			if (chdir(ConfigFileEntry.dpath))
536			{
537			perror("chdir");
538			exit(EXIT_FAILURE);
539			}
540
541			init_ssl();
542
543			if (!server_state.foreground)
544			{
545			make_daemon();
546			close_standard_fds(); /* this needs to be before init_netio()! */
547			}
548			else
549			print_startup(getpid());
550
551			setup_signals();
552
553			get_ircd_platform(ircd_platform);
554
555			/* Init the event subsystem */
556			eventInit();
557			/* We need this to initialise the fd array before anything else */
558			fdlist_init();
559	michael	1247	log_add_file(LOG_TYPE_IRCD, 0, logFileName);
560	adx	30	check_can_use_v6();
561			init_comm(); /* This needs to be setup early ! -- adrian */
562			/* Check if there is pidfile and daemon already running */
563			check_pidfile(pidFileName);
564
565			initBlockHeap();
566			init_dlink_nodes();
567			init_callbacks();
568			initialize_message_files();
569			dbuf_init();
570			init_hash();
571			init_ip_hash_table(); /* client host ip hash table */
572			init_host_hash(); /* Host-hashtable. */
573			clear_tree_parse();
574			init_client();
575			init_class();
576			init_whowas();
577	michael	876	watch_init();
578	michael	998	init_auth(); /* Initialise the auth code */
579			init_resolver(); /* Needs to be setup before the io loop */
580	adx	30	read_conf_files(1); /* cold start init conf files */
581			init_uid();
582			initialize_server_capabs(); /* Set up default_server_capabs */
583			initialize_global_set_options();
584			init_channels();
585
586	michael	1115	if (EmptyString(ServerInfo.sid))
587	adx	30	{
588	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
589	adx	30	exit(EXIT_FAILURE);
590			}
591	michael	885
592	michael	1115	strlcpy(me.id, ServerInfo.sid, sizeof(me.id));
593
594			if (EmptyString(ServerInfo.name))
595			{
596	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
597	michael	1115	exit(EXIT_FAILURE);
598			}
599
600	adx	30	strlcpy(me.name, ServerInfo.name, sizeof(me.name));
601
602			/* serverinfo{} description must exist. If not, error out.*/
603	michael	1115	if (EmptyString(ServerInfo.description))
604	adx	30	{
605	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
606	adx	30	exit(EXIT_FAILURE);
607			}
608	michael	885
609	adx	30	strlcpy(me.info, ServerInfo.description, sizeof(me.info));
610
611	michael	1241	me.from = &me;
612			me.servptr = &me;
613			me.localClient->lasttime = CurrentTime;
614			me.localClient->since = CurrentTime;
615			me.localClient->firsttime = CurrentTime;
616	adx	30
617			SetMe(&me);
618			make_server(&me);
619
620	michael	1115	hash_add_id(&me);
621	adx	30	hash_add_client(&me);
622
623			/* add ourselves to global_serv_list */
624			dlinkAdd(&me, make_dlink_node(), &global_serv_list);
625
626			if (chdir(MODPATH))
627			{
628	michael	1247	ilog(LOG_TYPE_IRCD, "Could not load core modules. Terminating!");
629	adx	30	exit(EXIT_FAILURE);
630			}
631
632			load_all_modules(1);
633			load_conf_modules();
634			load_core_modules(1);
635	michael	1115
636	adx	30	/* Go back to DPATH after checking to see if we can chdir to MODPATH */
637	michael	1115	if (chdir(ConfigFileEntry.dpath))
638			{
639			perror("chdir");
640			exit(EXIT_FAILURE);
641			}
642	michael	1121
643	adx	30	/*
644			* assemble_umode_buffer() has to be called after
645			* reading conf/loading modules.
646			*/
647			assemble_umode_buffer();
648
649			write_pidfile(pidFileName);
650
651	michael	1247	ilog(LOG_TYPE_IRCD, "Server Ready");
652	adx	30
653			eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
654			eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
655
656			/* We want try_connections to be called as soon as possible now! -- adrian */
657			/* No, 'cause after a restart it would cause all sorts of nick collides */
658			eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
659
660			/* Setup the timeout check. I'll shift it later :) -- adrian */
661			eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
662
663			if (ConfigServerHide.links_delay > 0)
664			eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
665			else
666			ConfigServerHide.links_disabled = 1;
667
668			if (splitmode)
669			eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
670
671			io_loop();
672	michael	885	return 0;
673	adx	30	}