trunk/src/ircd.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2014 ircd-hybrid development team
 *
 *  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
 */

/*! \file ircd.c
 * \brief Starts up and runs the ircd.
 * \version $Id$
 */

#include "stdinc.h"
#include "user.h"
#include "list.h"
#include "ircd.h"
#include "channel.h"
#include "client.h"
#include "event.h"
#include "fdlist.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd_signal.h"
#include "gline.h"
#include "motd.h"
#include "conf.h"
#include "hostmask.h"
#include "parse.h"
#include "res.h"
#include "restart.h"
#include "rng_mt.h"
#include "auth.h"
#include "s_bsd.h"
#include "log.h"
#include "server.h"      /* try_connections */
#include "send.h"
#include "whowas.h"
#include "modules.h"
#include "memory.h"
#include "mempool.h"
#include "ircd_getopt.h"
#include "supported.h"
#include "watch.h"
#include "conf_db.h"
#include "conf_class.h"


#ifdef HAVE_LIBGEOIP
GeoIP *geoip_ctx;
#endif

/* /quote set variables */
struct SetOptions GlobalSetOptions;
struct Counter Count;
struct ServerState_t server_state;
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;

int dorehash = 0;
int doremotd = 0;

/* Set to zero because it should be initialized later using
 * initialize_server_capabs
 */
unsigned int default_server_capabs;
unsigned int splitmode;
unsigned int splitchecking;
unsigned int split_users;
unsigned int split_servers;

/*
 * print_startup - print startup information
 */
static void
print_startup(int pid)
{
  printf("ircd: version %s(%s)\n", ircd_version, serno);
  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;

static struct lgetopt myopts[] =
{
  {"configfile", &ConfigFileEntry.configfile,
   STRING, "File to use for ircd.conf"},
  {"glinefile",  &ConfigFileEntry.glinefile,
   STRING, "File to use for gline database"},
  {"klinefile",  &ConfigFileEntry.klinefile,
   STRING, "File to use for kline database"},
  {"dlinefile",  &ConfigFileEntry.dlinefile,
   STRING, "File to use for dline database"},
  {"xlinefile",  &ConfigFileEntry.xlinefile,
   STRING, "File to use for xline database"},
  {"resvfile",  &ConfigFileEntry.resvfile,
   STRING, "File to use for resv database"},
  {"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)
{
  struct timeval newtime = { .tv_sec = 0, .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, SEND_NOTICE,
                         "Clock Failure (%s), TS can be corrupted",
                         strerror(errno));
    server_die("Clock Failure", 1);
  }

  if (newtime.tv_sec < CurrentTime)
  {
    ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
         (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
    sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
                         "System clock is running backwards - (%lu < %lu)",
                         (unsigned long)newtime.tv_sec,
                         (unsigned long)CurrentTime);
    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)
  {
    if (listing_client_list.head)
    {
      dlink_node *ptr = NULL, *ptr_next = NULL;
      DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
        safe_list_channels(ptr->data, 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();

    /* Check to see whether we have to rehash the configuration .. */
    if (dorehash)
    {
      rehash(1);
      dorehash = 0;
    }

    if (doremotd)
    {
      motd_recache();
      sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                           "Got signal SIGUSR1, reloading motd file(s)");
      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_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);
  add_capability("CHW", CAP_CHW, 1);
  add_capability("HOPS", CAP_HOPS, 1);
}

/* 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)
{
  FILE *fb;

  if ((fb = fopen(filename, "w")))
  {
    char buff[IRCD_BUFSIZE];
    unsigned int pid = (unsigned int)getpid();

    snprintf(buff, sizeof(buff), "%u\n", pid);

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

    fclose(fb);
  }
  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)
{
  FILE *fb;
  char buff[IRCD_BUFSIZE];
  pid_t pidfromfile;

  /* Don't do logging here, since we don't have log() initialised */
  if ((fb = fopen(filename, "r")))
  {
    if (fgets(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);
      }
    }

    fclose(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
}

#ifdef HAVE_LIBCRYPTO
static int
always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
{
  return 1;
}
#endif

/* init_ssl()
 *
 * inputs       - nothing
 * output       - nothing
 * side effects - setups SSL context.
 */
static void
ssl_init(void)
{
#ifdef HAVE_LIBCRYPTO
  const unsigned char session_id[] = "ircd-hybrid";

  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_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
  SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
  SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
                     always_accept_verify_cb);
  SSL_CTX_set_session_id_context(ServerInfo.server_ctx, session_id, sizeof(session_id) - 1);

  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_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
  SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
  SSL_CTX_set_verify(ServerInfo.client_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
                     always_accept_verify_cb);
#endif /* HAVE_LIBCRYPTO */
}

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, "ERROR: This server won't run as root/superuser\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 */
  ConfigFileEntry.dpath      = DPATH;
  ConfigFileEntry.spath      = SPATH;
  ConfigFileEntry.mpath      = MPATH;
  ConfigFileEntry.configfile = CPATH;    /* Server configuration file */
  ConfigFileEntry.klinefile  = KPATH;    /* Server kline file         */
  ConfigFileEntry.glinefile  = GPATH;    /* Server gline file         */
  ConfigFileEntry.xlinefile  = XPATH;    /* Server xline file         */
  ConfigFileEntry.dlinefile  = DLPATH;   /* dline file                */
  ConfigFileEntry.resvfile   = RESVPATH; /* resv file                 */

  myargv = argv;
  umask(077);                /* better safe than sorry --SRB */

  parseargs(&argc, &argv, myopts);

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

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

  ssl_init();

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

  setup_signals();

  /* Init the event subsystem */
  eventInit();

  /* We need this to initialise the fd array before anything else */
  fdlist_init();
  log_set_file(LOG_TYPE_IRCD, 0, logFileName);
  check_can_use_v6();
  init_netio();         /* This needs to be setup early ! -- adrian */

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

  mp_pool_init();
  init_dlink_nodes();
  init_isupport();
  dbuf_init();
  hash_init();
  init_ip_hash_table();      /* client host ip hash table */
  init_host_hash();          /* Host-hashtable. */
  client_init();
  class_init();
  whowas_init();
  watch_init();
  auth_init();          /* Initialise the auth code */
  init_resolver();      /* Needs to be setup before the io loop */
  modules_init();
  read_conf_files(1);   /* cold start init conf files */
  init_uid();
  initialize_server_capabs();   /* Set up default_server_capabs */
  initialize_global_set_options();
  channel_init();
  read_links_file();
  motd_init();
#ifdef HAVE_LIBGEOIP
  geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
#endif

  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);

  load_kline_database();
  load_dline_database();
  load_gline_database();
  load_xline_database();
  load_resv_database();

  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);

  eventAddIsh("save_all_databases", save_all_databases, NULL, DATABASE_UPDATE_TIMEOUT);

  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:	3929
Committed:	Mon Jun 9 14:56:25 2014 UTC (11 years, 2 months ago) by michael
Content type:	text/x-csrc
File size:	16438 byte(s)
Log Message:	- Greatly speedup d-line lookup. Instead of testing every single client against every existing d-line just check the just added ban against connected clients. Also now check d-line _before_ looking for a matching exempt{}
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2014 ircd-hybrid development team
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19	* USA
20	*/
21
22	/*! \file ircd.c
23	* \brief Starts up and runs the ircd.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "user.h"
29	#include "list.h"
30	#include "ircd.h"
31	#include "channel.h"
32	#include "client.h"
33	#include "event.h"
34	#include "fdlist.h"
35	#include "hash.h"
36	#include "irc_string.h"
37	#include "ircd_signal.h"
38	#include "gline.h"
39	#include "motd.h"
40	#include "conf.h"
41	#include "hostmask.h"
42	#include "parse.h"
43	#include "res.h"
44	#include "restart.h"
45	#include "rng_mt.h"
46	#include "auth.h"
47	#include "s_bsd.h"
48	#include "log.h"
49	#include "server.h" /* try_connections */
50	#include "send.h"
51	#include "whowas.h"
52	#include "modules.h"
53	#include "memory.h"
54	#include "mempool.h"
55	#include "ircd_getopt.h"
56	#include "supported.h"
57	#include "watch.h"
58	#include "conf_db.h"
59	#include "conf_class.h"
60
61
62	#ifdef HAVE_LIBGEOIP
63	GeoIP *geoip_ctx;
64	#endif
65
66	/* /quote set variables */
67	struct SetOptions GlobalSetOptions;
68	struct Counter Count;
69	struct ServerState_t server_state;
70	struct ServerStatistics ServerStats;
71	struct timeval SystemTime;
72	struct Client me; /* That's me */
73	struct LocalUser meLocalUser; /* That's also part of me */
74
75	const char *logFileName = LPATH;
76	const char *pidFileName = PPATH;
77
78	char **myargv;
79
80	int dorehash = 0;
81	int doremotd = 0;
82
83	/* Set to zero because it should be initialized later using
84	* initialize_server_capabs
85	*/
86	unsigned int default_server_capabs;
87	unsigned int splitmode;
88	unsigned int splitchecking;
89	unsigned int split_users;
90	unsigned int split_servers;
91
92	/*
93	* print_startup - print startup information
94	*/
95	static void
96	print_startup(int pid)
97	{
98	printf("ircd: version %s(%s)\n", ircd_version, serno);
99	printf("ircd: pid %d\n", pid);
100	printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
101	: "foreground", ConfigFileEntry.dpath);
102	}
103
104	static void
105	make_daemon(void)
106	{
107	int pid;
108
109	if ((pid = fork()) < 0)
110	{
111	perror("fork");
112	exit(EXIT_FAILURE);
113	}
114	else if (pid > 0)
115	{
116	print_startup(pid);
117	exit(EXIT_SUCCESS);
118	}
119
120	setsid();
121	}
122
123	static int printVersion = 0;
124
125	static struct lgetopt myopts[] =
126	{
127	{"configfile", &ConfigFileEntry.configfile,
128	STRING, "File to use for ircd.conf"},
129	{"glinefile", &ConfigFileEntry.glinefile,
130	STRING, "File to use for gline database"},
131	{"klinefile", &ConfigFileEntry.klinefile,
132	STRING, "File to use for kline database"},
133	{"dlinefile", &ConfigFileEntry.dlinefile,
134	STRING, "File to use for dline database"},
135	{"xlinefile", &ConfigFileEntry.xlinefile,
136	STRING, "File to use for xline database"},
137	{"resvfile", &ConfigFileEntry.resvfile,
138	STRING, "File to use for resv database"},
139	{"logfile", &logFileName,
140	STRING, "File to use for ircd.log"},
141	{"pidfile", &pidFileName,
142	STRING, "File to use for process ID"},
143	{"foreground", &server_state.foreground,
144	YESNO, "Run in foreground (don't detach)"},
145	{"version", &printVersion,
146	YESNO, "Print version and exit"},
147	{"help", NULL, USAGE, "Print this text"},
148	{NULL, NULL, STRING, NULL},
149	};
150
151	void
152	set_time(void)
153	{
154	struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
155
156	if (gettimeofday(&newtime, NULL) == -1)
157	{
158	ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
159	strerror(errno));
160	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
161	"Clock Failure (%s), TS can be corrupted",
162	strerror(errno));
163	server_die("Clock Failure", 1);
164	}
165
166	if (newtime.tv_sec < CurrentTime)
167	{
168	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
169	(unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
170	sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
171	"System clock is running backwards - (%lu < %lu)",
172	(unsigned long)newtime.tv_sec,
173	(unsigned long)CurrentTime);
174	set_back_events(CurrentTime - newtime.tv_sec);
175	}
176
177	SystemTime.tv_sec = newtime.tv_sec;
178	SystemTime.tv_usec = newtime.tv_usec;
179	}
180
181	static void
182	io_loop(void)
183	{
184	while (1)
185	{
186	if (listing_client_list.head)
187	{
188	dlink_node ptr = NULL, ptr_next = NULL;
189	DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
190	safe_list_channels(ptr->data, 0);
191	}
192
193	/* Run pending events, then get the number of seconds to the next
194	* event
195	*/
196	while (eventNextTime() <= CurrentTime)
197	eventRun();
198
199	comm_select();
200	exit_aborted_clients();
201	free_exited_clients();
202
203	/* Check to see whether we have to rehash the configuration .. */
204	if (dorehash)
205	{
206	rehash(1);
207	dorehash = 0;
208	}
209
210	if (doremotd)
211	{
212	motd_recache();
213	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
214	"Got signal SIGUSR1, reloading motd file(s)");
215	doremotd = 0;
216	}
217	}
218	}
219
220	/* initalialize_global_set_options()
221	*
222	* inputs - none
223	* output - none
224	* side effects - This sets all global set options needed
225	*/
226	static void
227	initialize_global_set_options(void)
228	{
229	memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
230
231	GlobalSetOptions.autoconn = 1;
232	GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
233	GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
234
235	if (ConfigFileEntry.default_floodcount)
236	GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
237	else
238	GlobalSetOptions.floodcount = 10;
239
240	/* XXX I have no idea what to try here - Dianora */
241	GlobalSetOptions.joinfloodcount = 16;
242	GlobalSetOptions.joinfloodtime = 8;
243
244	split_servers = ConfigChannel.default_split_server_count;
245	split_users = ConfigChannel.default_split_user_count;
246
247	if (split_users && split_servers && (ConfigChannel.no_create_on_split \|\|
248	ConfigChannel.no_join_on_split))
249	{
250	splitmode = 1;
251	splitchecking = 1;
252	}
253
254	GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
255	/* End of global set options */
256	}
257
258	/* initialize_server_capabs()
259	*
260	* inputs - none
261	* output - none
262	*/
263	static void
264	initialize_server_capabs(void)
265	{
266	add_capability("QS", CAP_QS, 1);
267	add_capability("EOB", CAP_EOB, 1);
268	add_capability("TS6", CAP_TS6, 0);
269	add_capability("CLUSTER", CAP_CLUSTER, 1);
270	add_capability("SVS", CAP_SVS, 1);
271	add_capability("CHW", CAP_CHW, 1);
272	add_capability("HOPS", CAP_HOPS, 1);
273	}
274
275	/* write_pidfile()
276	*
277	* inputs - filename+path of pid file
278	* output - NONE
279	* side effects - write the pid of the ircd to filename
280	*/
281	static void
282	write_pidfile(const char *filename)
283	{
284	FILE *fb;
285
286	if ((fb = fopen(filename, "w")))
287	{
288	char buff[IRCD_BUFSIZE];
289	unsigned int pid = (unsigned int)getpid();
290
291	snprintf(buff, sizeof(buff), "%u\n", pid);
292
293	if ((fputs(buff, fb) == -1))
294	ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
295	pid, filename, strerror(errno));
296
297	fclose(fb);
298	}
299	else
300	{
301	ilog(LOG_TYPE_IRCD, "Error opening pid file %s", filename);
302	}
303	}
304
305	/* check_pidfile()
306	*
307	* inputs - filename+path of pid file
308	* output - none
309	* side effects - reads pid from pidfile and checks if ircd is in process
310	* list. if it is, gracefully exits
311	* -kre
312	*/
313	static void
314	check_pidfile(const char *filename)
315	{
316	FILE *fb;
317	char buff[IRCD_BUFSIZE];
318	pid_t pidfromfile;
319
320	/* Don't do logging here, since we don't have log() initialised */
321	if ((fb = fopen(filename, "r")))
322	{
323	if (fgets(buff, 20, fb) == NULL)
324	{
325	/* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
326	* strerror(errno));
327	*/
328	}
329	else
330	{
331	pidfromfile = atoi(buff);
332
333	if (!kill(pidfromfile, 0))
334	{
335	/* log(L_ERROR, "Server is already running"); */
336	printf("ircd: daemon is already running\n");
337	exit(-1);
338	}
339	}
340
341	fclose(fb);
342	}
343	else if (errno != ENOENT)
344	{
345	/* log(L_ERROR, "Error opening pid file %s", filename); */
346	}
347	}
348
349	/* setup_corefile()
350	*
351	* inputs - nothing
352	* output - nothing
353	* side effects - setups corefile to system limits.
354	* -kre
355	*/
356	static void
357	setup_corefile(void)
358	{
359	#ifdef HAVE_SYS_RESOURCE_H
360	struct rlimit rlim; /* resource limits */
361
362	/* Set corefilesize to maximum */
363	if (!getrlimit(RLIMIT_CORE, &rlim))
364	{
365	rlim.rlim_cur = rlim.rlim_max;
366	setrlimit(RLIMIT_CORE, &rlim);
367	}
368	#endif
369	}
370
371	#ifdef HAVE_LIBCRYPTO
372	static int
373	always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
374	{
375	return 1;
376	}
377	#endif
378
379	/* init_ssl()
380	*
381	* inputs - nothing
382	* output - nothing
383	* side effects - setups SSL context.
384	*/
385	static void
386	ssl_init(void)
387	{
388	#ifdef HAVE_LIBCRYPTO
389	const unsigned char session_id[] = "ircd-hybrid";
390
391	SSL_load_error_strings();
392	SSLeay_add_ssl_algorithms();
393
394	if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
395	{
396	const char *s;
397
398	fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n",
399	s = ERR_lib_error_string(ERR_get_error()));
400	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
401	}
402
403	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TLSv1);
404	SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
405	SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
406	always_accept_verify_cb);
407	SSL_CTX_set_session_id_context(ServerInfo.server_ctx, session_id, sizeof(session_id) - 1);
408
409	if ((ServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
410	{
411	const char *s;
412
413	fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n",
414	s = ERR_lib_error_string(ERR_get_error()));
415	ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
416	}
417
418	SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_NO_SSLv2\|SSL_OP_NO_SSLv3\|SSL_OP_NO_TLSv1);
419	SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_TLS_ROLLBACK_BUG\|SSL_OP_ALL);
420	SSL_CTX_set_verify(ServerInfo.client_ctx, SSL_VERIFY_PEER\|SSL_VERIFY_CLIENT_ONCE,
421	always_accept_verify_cb);
422	#endif /* HAVE_LIBCRYPTO */
423	}
424
425	int
426	main(int argc, char *argv[])
427	{
428	/* Check to see if the user is running us as root, which is a nono */
429	if (geteuid() == 0)
430	{
431	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
432	return -1;
433	}
434
435	/* Setup corefile size immediately after boot -kre */
436	setup_corefile();
437
438	/* save server boot time right away, so getrusage works correctly */
439	set_time();
440
441	/* It ain't random, but it ought to be a little harder to guess */
442	init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
443
444	me.localClient = &meLocalUser;
445	dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
446	of Client list */
447	ConfigFileEntry.dpath = DPATH;
448	ConfigFileEntry.spath = SPATH;
449	ConfigFileEntry.mpath = MPATH;
450	ConfigFileEntry.configfile = CPATH; /* Server configuration file */
451	ConfigFileEntry.klinefile = KPATH; /* Server kline file */
452	ConfigFileEntry.glinefile = GPATH; /* Server gline file */
453	ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
454	ConfigFileEntry.dlinefile = DLPATH; /* dline file */
455	ConfigFileEntry.resvfile = RESVPATH; /* resv file */
456
457	myargv = argv;
458	umask(077); /* better safe than sorry --SRB */
459
460	parseargs(&argc, &argv, myopts);
461
462	if (printVersion)
463	{
464	printf("ircd: version %s(%s)\n", ircd_version, serno);
465	exit(EXIT_SUCCESS);
466	}
467
468	if (chdir(ConfigFileEntry.dpath))
469	{
470	perror("chdir");
471	exit(EXIT_FAILURE);
472	}
473
474	ssl_init();
475
476	if (!server_state.foreground)
477	{
478	make_daemon();
479	close_standard_fds(); /* this needs to be before init_netio()! */
480	}
481	else
482	print_startup(getpid());
483
484	setup_signals();
485
486	/* Init the event subsystem */
487	eventInit();
488
489	/* We need this to initialise the fd array before anything else */
490	fdlist_init();
491	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
492	check_can_use_v6();
493	init_netio(); /* This needs to be setup early ! -- adrian */
494
495	/* Check if there is pidfile and daemon already running */
496	check_pidfile(pidFileName);
497
498	mp_pool_init();
499	init_dlink_nodes();
500	init_isupport();
501	dbuf_init();
502	hash_init();
503	init_ip_hash_table(); /* client host ip hash table */
504	init_host_hash(); /* Host-hashtable. */
505	client_init();
506	class_init();
507	whowas_init();
508	watch_init();
509	auth_init(); /* Initialise the auth code */
510	init_resolver(); /* Needs to be setup before the io loop */
511	modules_init();
512	read_conf_files(1); /* cold start init conf files */
513	init_uid();
514	initialize_server_capabs(); /* Set up default_server_capabs */
515	initialize_global_set_options();
516	channel_init();
517	read_links_file();
518	motd_init();
519	#ifdef HAVE_LIBGEOIP
520	geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
521	#endif
522
523	if (EmptyString(ServerInfo.sid))
524	{
525	ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
526	exit(EXIT_FAILURE);
527	}
528
529	strlcpy(me.id, ServerInfo.sid, sizeof(me.id));
530
531	if (EmptyString(ServerInfo.name))
532	{
533	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
534	exit(EXIT_FAILURE);
535	}
536
537	strlcpy(me.name, ServerInfo.name, sizeof(me.name));
538
539	/* serverinfo{} description must exist. If not, error out.*/
540	if (EmptyString(ServerInfo.description))
541	{
542	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
543	exit(EXIT_FAILURE);
544	}
545
546	strlcpy(me.info, ServerInfo.description, sizeof(me.info));
547
548	me.from = &me;
549	me.servptr = &me;
550	me.localClient->lasttime = CurrentTime;
551	me.localClient->since = CurrentTime;
552	me.localClient->firsttime = CurrentTime;
553
554	SetMe(&me);
555	make_server(&me);
556
557	hash_add_id(&me);
558	hash_add_client(&me);
559
560	/* add ourselves to global_serv_list */
561	dlinkAdd(&me, make_dlink_node(), &global_serv_list);
562
563	load_kline_database();
564	load_dline_database();
565	load_gline_database();
566	load_xline_database();
567	load_resv_database();
568
569	if (chdir(MODPATH))
570	{
571	ilog(LOG_TYPE_IRCD, "Could not load core modules. Terminating!");
572	exit(EXIT_FAILURE);
573	}
574
575	load_all_modules(1);
576	load_conf_modules();
577	load_core_modules(1);
578
579	/* Go back to DPATH after checking to see if we can chdir to MODPATH */
580	if (chdir(ConfigFileEntry.dpath))
581	{
582	perror("chdir");
583	exit(EXIT_FAILURE);
584	}
585
586	/*
587	* assemble_umode_buffer() has to be called after
588	* reading conf/loading modules.
589	*/
590	assemble_umode_buffer();
591
592	write_pidfile(pidFileName);
593
594	ilog(LOG_TYPE_IRCD, "Server Ready");
595
596	eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
597	eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
598
599	/* We want try_connections to be called as soon as possible now! -- adrian */
600	/* No, 'cause after a restart it would cause all sorts of nick collides */
601	eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
602
603	/* Setup the timeout check. I'll shift it later :) -- adrian */
604	eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
605
606	eventAddIsh("save_all_databases", save_all_databases, NULL, DATABASE_UPDATE_TIMEOUT);
607
608	if (ConfigServerHide.links_delay > 0)
609	eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
610	else
611	ConfigServerHide.links_disabled = 1;
612
613	if (splitmode)
614	eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
615
616	io_loop();
617	return 0;
618	}