[mirror_frr.git] / zebra / main.c

/* zebra daemon main routine.
 * Copyright (C) 1997, 98 Kunihiro Ishiguro
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra 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, or (at your option) any
 * later version.
 *
 * GNU Zebra 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 GNU Zebra; see the file COPYING.  If not, write to the Free
 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.  
 */

#include <zebra.h>

#include <lib/version.h>
#include "getopt.h"
#include "command.h"
#include "thread.h"
#include "filter.h"
#include "memory.h"
#include "prefix.h"
#include "log.h"
#include "privs.h"
#include "sigevent.h"

#include "zebra/rib.h"
#include "zebra/zserv.h"
#include "zebra/debug.h"
#include "zebra/router-id.h"
#include "zebra/irdp.h"

/* Zebra instance */
struct zebra_t zebrad =
{
  .rtm_table_default = 0,
};

/* process id. */
pid_t old_pid;
pid_t pid;

/* Pacify zclient.o in libzebra, which expects this variable. */
struct thread_master *master;

/* Route retain mode flag. */
int retain_mode = 0;

/* Don't delete kernel route. */
int keep_kernel_mode = 0;

#ifdef HAVE_NETLINK
/* Receive buffer size for netlink socket */
u_int32_t nl_rcvbufsize = 0;
#endif /* HAVE_NETLINK */

/* Command line options. */
struct option longopts[] = 
{
  { "batch",       no_argument,       NULL, 'b'},
  { "daemon",      no_argument,       NULL, 'd'},
  { "keep_kernel", no_argument,       NULL, 'k'},
  { "log_mode",    no_argument,       NULL, 'l'},
  { "config_file", required_argument, NULL, 'f'},
  { "pid_file",    required_argument, NULL, 'i'},
  { "help",        no_argument,       NULL, 'h'},
  { "vty_addr",    required_argument, NULL, 'A'},
  { "vty_port",    required_argument, NULL, 'P'},
  { "retain",      no_argument,       NULL, 'r'},
#ifdef HAVE_NETLINK
  { "nl-bufsize",  no_argument,       NULL, 's'},
#endif /* HAVE_NETLINK */
  { "user",        required_argument, NULL, 'u'},
  { "group",       required_argument, NULL, 'g'},
  { "version",     no_argument,       NULL, 'v'},
  { 0 }
};

zebra_capabilities_t _caps_p [] = 
{
  ZCAP_ADMIN,
  ZCAP_SYS_ADMIN,
  ZCAP_RAW,
};

/* zebra privileges to run with */
struct zebra_privs_t zserv_privs =
{
#if defined(QUAGGA_USER) && defined(QUAGGA_GROUP)
  .user = QUAGGA_USER,
  .group = QUAGGA_GROUP,
#endif
#ifdef VTY_GROUP
  .vty_group = VTY_GROUP,
#endif
  .caps_p = _caps_p,
  .cap_num_p = sizeof(_caps_p)/sizeof(_caps_p[0]),
  .cap_num_i = 0
};

/* Default configuration file path. */
char config_default[] = SYSCONFDIR DEFAULT_CONFIG_FILE;

/* Process ID saved for use by init system */
const char *pid_file = PATH_ZEBRA_PID;

/* Help information display. */
static void
usage (char *progname, int status)
{
  if (status != 0)
    fprintf (stderr, "Try `%s --help' for more information.\n", progname);
  else
    {    
      printf ("Usage : %s [OPTION...]\n\n"\
	      "Daemon which manages kernel routing table management and "\
	      "redistribution between different routing protocols.\n\n"\
	      "-b, --batch        Runs in batch mode\n"\
	      "-d, --daemon       Runs in daemon mode\n"\
	      "-f, --config_file  Set configuration file name\n"\
	      "-i, --pid_file     Set process identifier file name\n"\
	      "-k, --keep_kernel  Don't delete old routes which installed by "\
				  "zebra.\n"\
	      "-l, --log_mode     Set verbose log mode flag\n"\
	      "-A, --vty_addr     Set vty's bind address\n"\
	      "-P, --vty_port     Set vty's port number\n"\
	      "-r, --retain       When program terminates, retain added route "\
				  "by zebra.\n"\
	      "-u, --user         User to run as\n"\
	      "-g, --group	  Group to run as\n", progname);
#ifdef HAVE_NETLINK
      printf ("-s, --nl-bufsize   Set netlink receive buffer size\n");
#endif /* HAVE_NETLINK */
      printf ("-v, --version      Print program version\n"\
	      "-h, --help         Display this help and exit\n"\
	      "\n"\
	      "Report bugs to %s\n", ZEBRA_BUG_ADDRESS);
    }

  exit (status);
}
\f
/* SIGHUP handler. */
void 
sighup (void)
{
  zlog_info ("SIGHUP received");

  /* Reload of config file. */
  ;
}

/* SIGINT handler. */
void
sigint (void)
{
  /* Decrared in rib.c */
  void rib_close ();

  zlog_notice ("Terminating on signal");

  if (!retain_mode)
    rib_close ();
#ifdef HAVE_IRDP
  irdp_finish();
#endif

  exit (0);
}

/* SIGUSR1 handler. */
void
sigusr1 (void)
{
  zlog_rotate (NULL);
}

struct quagga_signal_t zebra_signals[] =
{
  { 
    .signal = SIGHUP, 
    .handler = &sighup,
  },
  {
    .signal = SIGUSR1,
    .handler = &sigusr1,
  },
  {
    .signal = SIGINT,
    .handler = &sigint,
  },
  {
    .signal = SIGTERM,
    .handler = &sigint,
  },
};
\f
/* Main startup routine. */
int
main (int argc, char **argv)
{
  char *p;
  char *vty_addr = NULL;
  int vty_port = ZEBRA_VTY_PORT;
  int batch_mode = 0;
  int daemon_mode = 0;
  char *config_file = NULL;
  char *progname;
  struct thread thread;
  void rib_weed_tables ();
  void zebra_vty_init ();

  /* Set umask before anything for security */
  umask (0027);

  /* preserve my name */
  progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);

  zlog_default = openzlog (progname, ZLOG_ZEBRA,
			   LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);

  while (1) 
    {
      int opt;
  
#ifdef HAVE_NETLINK  
      opt = getopt_long (argc, argv, "bdklf:i:hA:P:ru:g:vs:", longopts, 0);
#else
      opt = getopt_long (argc, argv, "bdklf:i:hA:P:ru:g:v", longopts, 0);
#endif /* HAVE_NETLINK */

      if (opt == EOF)
	break;

      switch (opt) 
	{
	case 0:
	  break;
	case 'b':
	  batch_mode = 1;
	case 'd':
	  daemon_mode = 1;
	  break;
	case 'k':
	  keep_kernel_mode = 1;
	  break;
	case 'l':
	  /* log_mode = 1; */
	  break;
	case 'f':
	  config_file = optarg;
	  break;
	case 'A':
	  vty_addr = optarg;
	  break;
        case 'i':
          pid_file = optarg;
          break;
	case 'P':
	  /* Deal with atoi() returning 0 on failure, and zebra not
	     listening on zebra port... */
	  if (strcmp(optarg, "0") == 0) 
	    {
	      vty_port = 0;
	      break;
	    } 
	  vty_port = atoi (optarg);
	  vty_port = (vty_port ? vty_port : ZEBRA_VTY_PORT);
	  break;
	case 'r':
	  retain_mode = 1;
	  break;
#ifdef HAVE_NETLINK
	case 's':
	  nl_rcvbufsize = atoi (optarg);
	  break;
#endif /* HAVE_NETLINK */
	case 'u':
	  zserv_privs.user = optarg;
	  break;
	case 'g':
	  zserv_privs.group = optarg;
	  break;
	case 'v':
	  print_version (progname);
	  exit (0);
	  break;
	case 'h':
	  usage (progname, 0);
	  break;
	default:
	  usage (progname, 1);
	  break;
	}
    }

  /* Make master thread emulator. */
  zebrad.master = thread_master_create ();

  /* privs initialise */
  zprivs_init (&zserv_privs);

  /* Vty related initialize. */
  signal_init (zebrad.master, Q_SIGC(zebra_signals), zebra_signals);
  cmd_init (1);
  vty_init (zebrad.master);
  memory_init ();

  /* Zebra related initialize. */
  zebra_init ();
  rib_init ();
  zebra_if_init ();
  zebra_debug_init ();
  router_id_init();
  zebra_vty_init ();
  access_list_init ();
  rtadv_init ();
#ifdef HAVE_IRDP
  irdp_init();
#endif

  /* For debug purpose. */
  /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */

  /* Make kernel routing socket. */
  kernel_init ();
  interface_list ();
  route_read ();

  /* Sort VTY commands. */
  sort_node ();

#ifdef HAVE_SNMP
  zebra_snmp_init ();
#endif /* HAVE_SNMP */

  /* Clean up self inserted route. */
  if (! keep_kernel_mode)
    rib_sweep_route ();

  /* Configuration file read*/
  vty_read_config (config_file, config_default);

  /* Clean up rib. */
  rib_weed_tables ();

  /* Exit when zebra is working in batch mode. */
  if (batch_mode)
    exit (0);

  /* Needed for BSD routing socket. */
  old_pid = getpid ();

  /* Daemonize. */
  if (daemon_mode)
    daemon (0, 0);

  /* Output pid of zebra. */
  pid_output (pid_file);

  /* Needed for BSD routing socket. */
  pid = getpid ();

  /* Make vty server socket. */
  vty_serv_sock (vty_addr, vty_port, ZEBRA_VTYSH_PATH);

  /* Print banner. */
  zlog_notice ("Zebra %s starting: vty@%d", QUAGGA_VERSION, vty_port);

  while (thread_fetch (zebrad.master, &thread))
    thread_call (&thread);

  /* Not reached... */
  exit (0);
}
Commit	Line	Data
edd7c245	1	/* zebra daemon main routine.
718e3744	2	* Copyright (C) 1997, 98 Kunihiro Ishiguro
	3	*
	4	* This file is part of GNU Zebra.
	5	*
	6	* GNU Zebra is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2, or (at your option) any
	9	* later version.
	10	*
	11	* GNU Zebra is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with GNU Zebra; see the file COPYING. If not, write to the Free
	18	* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	19	* 02111-1307, USA.
	20	*/
	21
	22	#include <zebra.h>
	23
5e4fa164	24	#include <lib/version.h>
718e3744	25	#include "getopt.h"
	26	#include "command.h"
	27	#include "thread.h"
	28	#include "filter.h"
	29	#include "memory.h"
	30	#include "prefix.h"
	31	#include "log.h"
edd7c245	32	#include "privs.h"
2d75d052	33	#include "sigevent.h"
718e3744	34
	35	#include "zebra/rib.h"
	36	#include "zebra/zserv.h"
	37	#include "zebra/debug.h"
18a6dce6	38	#include "zebra/router-id.h"
ca776988	39	#include "zebra/irdp.h"
718e3744	40
b21b19c5	41	/* Zebra instance */
	42	struct zebra_t zebrad =
	43	{
	44	.rtm_table_default = 0,
	45	};
718e3744	46
	47	/* process id. */
	48	pid_t old_pid;
	49	pid_t pid;
	50
87efd646	51	/* Pacify zclient.o in libzebra, which expects this variable. */
	52	struct thread_master *master;
	53
718e3744	54	/* Route retain mode flag. */
	55	int retain_mode = 0;
	56
	57	/* Don't delete kernel route. */
	58	int keep_kernel_mode = 0;
	59
c34b6b57	60	#ifdef HAVE_NETLINK
	61	/* Receive buffer size for netlink socket */
	62	u_int32_t nl_rcvbufsize = 0;
	63	#endif /* HAVE_NETLINK */
	64
718e3744	65	/* Command line options. */
	66	struct option longopts[] =
	67	{
	68	{ "batch", no_argument, NULL, 'b'},
	69	{ "daemon", no_argument, NULL, 'd'},
	70	{ "keep_kernel", no_argument, NULL, 'k'},
	71	{ "log_mode", no_argument, NULL, 'l'},
	72	{ "config_file", required_argument, NULL, 'f'},
	73	{ "pid_file", required_argument, NULL, 'i'},
	74	{ "help", no_argument, NULL, 'h'},
	75	{ "vty_addr", required_argument, NULL, 'A'},
	76	{ "vty_port", required_argument, NULL, 'P'},
	77	{ "retain", no_argument, NULL, 'r'},
c34b6b57	78	#ifdef HAVE_NETLINK
	79	{ "nl-bufsize", no_argument, NULL, 's'},
	80	#endif /* HAVE_NETLINK */
edd7c245	81	{ "user", required_argument, NULL, 'u'},
c065230a	82	{ "group", required_argument, NULL, 'g'},
718e3744	83	{ "version", no_argument, NULL, 'v'},
	84	{ 0 }
	85	};
	86
edd7c245	87	zebra_capabilities_t _caps_p [] =
	88	{
	89	ZCAP_ADMIN,
	90	ZCAP_SYS_ADMIN,
41908818	91	ZCAP_RAW,
edd7c245	92	};
	93
	94	/* zebra privileges to run with */
	95	struct zebra_privs_t zserv_privs =
	96	{
d81fadfd	97	#if defined(QUAGGA_USER) && defined(QUAGGA_GROUP)
	98	.user = QUAGGA_USER,
	99	.group = QUAGGA_GROUP,
edd7c245	100	#endif
	101	#ifdef VTY_GROUP
	102	.vty_group = VTY_GROUP,
	103	#endif
	104	.caps_p = _caps_p,
	105	.cap_num_p = sizeof(_caps_p)/sizeof(_caps_p[0]),
	106	.cap_num_i = 0
	107	};
	108
718e3744	109	/* Default configuration file path. */
718e3744	110	char config_default[] = SYSCONFDIR DEFAULT_CONFIG_FILE;
	111
	112	/* Process ID saved for use by init system */
fce954f8	113	const char *pid_file = PATH_ZEBRA_PID;
718e3744	114
	115	/* Help information display. */
	116	static void
	117	usage (char *progname, int status)
	118	{
	119	if (status != 0)
	120	fprintf (stderr, "Try `%s --help' for more information.\n", progname);
	121	else
	122	{
c34b6b57	123	printf ("Usage : %s [OPTION...]\n\n"\
	124	"Daemon which manages kernel routing table management and "\
	125	"redistribution between different routing protocols.\n\n"\
	126	"-b, --batch Runs in batch mode\n"\
	127	"-d, --daemon Runs in daemon mode\n"\
	128	"-f, --config_file Set configuration file name\n"\
	129	"-i, --pid_file Set process identifier file name\n"\
	130	"-k, --keep_kernel Don't delete old routes which installed by "\
	131	"zebra.\n"\
	132	"-l, --log_mode Set verbose log mode flag\n"\
	133	"-A, --vty_addr Set vty's bind address\n"\
	134	"-P, --vty_port Set vty's port number\n"\
	135	"-r, --retain When program terminates, retain added route "\
	136	"by zebra.\n"\
c065230a	137	"-u, --user User to run as\n"\
c065230a	138	"-g, --group Group to run as\n", progname);
c34b6b57	139	#ifdef HAVE_NETLINK
	140	printf ("-s, --nl-bufsize Set netlink receive buffer size\n");
	141	#endif /* HAVE_NETLINK */
	142	printf ("-v, --version Print program version\n"\
	143	"-h, --help Display this help and exit\n"\
	144	"\n"\
	145	"Report bugs to %s\n", ZEBRA_BUG_ADDRESS);
718e3744	146	}
	147
	148	exit (status);
	149	}
	150	\f
	151	/* SIGHUP handler. */
	152	void
2d75d052	153	sighup (void)
718e3744	154	{
	155	zlog_info ("SIGHUP received");
	156
	157	/* Reload of config file. */
	158	;
	159	}
	160
	161	/* SIGINT handler. */
	162	void
2d75d052	163	sigint (void)
718e3744	164	{
	165	/* Decrared in rib.c */
	166	void rib_close ();
	167
887c44a4	168	zlog_notice ("Terminating on signal");
718e3744	169
	170	if (!retain_mode)
	171	rib_close ();
ca776988	172	#ifdef HAVE_IRDP
	173	irdp_finish();
	174	#endif
718e3744	175
	176	exit (0);
	177	}
	178
	179	/* SIGUSR1 handler. */
	180	void
2d75d052	181	sigusr1 (void)
718e3744	182	{
	183	zlog_rotate (NULL);
	184	}
	185
2d75d052	186	struct quagga_signal_t zebra_signals[] =
718e3744	187	{
2d75d052	188	{
	189	.signal = SIGHUP,
	190	.handler = &sighup,
	191	},
	192	{
	193	.signal = SIGUSR1,
	194	.handler = &sigusr1,
	195	},
	196	{
	197	.signal = SIGINT,
8c903fbb	198	.handler = &sigint,
2d75d052	199	},
f571dab0	200	{
	201	.signal = SIGTERM,
	202	.handler = &sigint,
	203	},
2d75d052	204	};
718e3744	205	\f
	206	/* Main startup routine. */
	207	int
	208	main (int argc, char **argv)
	209	{
	210	char *p;
	211	char *vty_addr = NULL;
4fc4e7ab	212	int vty_port = ZEBRA_VTY_PORT;
718e3744	213	int batch_mode = 0;
	214	int daemon_mode = 0;
	215	char *config_file = NULL;
	216	char *progname;
	217	struct thread thread;
	218	void rib_weed_tables ();
	219	void zebra_vty_init ();
	220
	221	/* Set umask before anything for security */
	222	umask (0027);
	223
	224	/* preserve my name */
	225	progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
	226
274a4a44	227	zlog_default = openzlog (progname, ZLOG_ZEBRA,
718e3744	228	LOG_CONS\|LOG_NDELAY\|LOG_PID, LOG_DAEMON);
	229
	230	while (1)
	231	{
	232	int opt;
	233
c34b6b57	234	#ifdef HAVE_NETLINK
c065230a	235	opt = getopt_long (argc, argv, "bdklf:i:hA:P:ru:g:vs:", longopts, 0);
c34b6b57	236	#else
c065230a	237	opt = getopt_long (argc, argv, "bdklf:i:hA:P:ru:g:v", longopts, 0);
c34b6b57	238	#endif /* HAVE_NETLINK */
718e3744	239
	240	if (opt == EOF)
	241	break;
	242
	243	switch (opt)
	244	{
	245	case 0:
	246	break;
	247	case 'b':
	248	batch_mode = 1;
	249	case 'd':
	250	daemon_mode = 1;
	251	break;
	252	case 'k':
	253	keep_kernel_mode = 1;
	254	break;
	255	case 'l':
	256	/* log_mode = 1; */
	257	break;
	258	case 'f':
	259	config_file = optarg;
	260	break;
	261	case 'A':
	262	vty_addr = optarg;
	263	break;
	264	case 'i':
	265	pid_file = optarg;
	266	break;
	267	case 'P':
4fc4e7ab	268	/* Deal with atoi() returning 0 on failure, and zebra not
	269	listening on zebra port... */
	270	if (strcmp(optarg, "0") == 0)
	271	{
	272	vty_port = 0;
	273	break;
	274	}
718e3744	275	vty_port = atoi (optarg);
4fc4e7ab	276	vty_port = (vty_port ? vty_port : ZEBRA_VTY_PORT);
718e3744	277	break;
	278	case 'r':
	279	retain_mode = 1;
	280	break;
c34b6b57	281	#ifdef HAVE_NETLINK
	282	case 's':
	283	nl_rcvbufsize = atoi (optarg);
	284	break;
	285	#endif /* HAVE_NETLINK */
c065230a	286	case 'u':
	287	zserv_privs.user = optarg;
	288	break;
	289	case 'g':
	290	zserv_privs.group = optarg;
	291	break;
718e3744	292	case 'v':
	293	print_version (progname);
	294	exit (0);
	295	break;
	296	case 'h':
	297	usage (progname, 0);
	298	break;
	299	default:
	300	usage (progname, 1);
	301	break;
	302	}
	303	}
	304
	305	/* Make master thread emulator. */
b21b19c5	306	zebrad.master = thread_master_create ();
718e3744	307
edd7c245	308	/* privs initialise */
	309	zprivs_init (&zserv_privs);
	310
718e3744	311	/* Vty related initialize. */
2d75d052	312	signal_init (zebrad.master, Q_SIGC(zebra_signals), zebra_signals);
718e3744	313	cmd_init (1);
b21b19c5	314	vty_init (zebrad.master);
718e3744	315	memory_init ();
	316
	317	/* Zebra related initialize. */
	318	zebra_init ();
	319	rib_init ();
	320	zebra_if_init ();
	321	zebra_debug_init ();
18a6dce6	322	router_id_init();
718e3744	323	zebra_vty_init ();
	324	access_list_init ();
	325	rtadv_init ();
ca776988	326	#ifdef HAVE_IRDP
	327	irdp_init();
	328	#endif
718e3744	329
	330	/* For debug purpose. */
	331	/* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */
	332
	333	/* Make kernel routing socket. */
	334	kernel_init ();
	335	interface_list ();
	336	route_read ();
	337
	338	/* Sort VTY commands. */
	339	sort_node ();
	340
	341	#ifdef HAVE_SNMP
	342	zebra_snmp_init ();
	343	#endif /* HAVE_SNMP */
	344
	345	/* Clean up self inserted route. */
	346	if (! keep_kernel_mode)
	347	rib_sweep_route ();
	348
	349	/* Configuration file read*/
320ec10a	350	vty_read_config (config_file, config_default);
718e3744	351
	352	/* Clean up rib. */
	353	rib_weed_tables ();
	354
	355	/* Exit when zebra is working in batch mode. */
	356	if (batch_mode)
	357	exit (0);
	358
	359	/* Needed for BSD routing socket. */
	360	old_pid = getpid ();
	361
	362	/* Daemonize. */
	363	if (daemon_mode)
	364	daemon (0, 0);
	365
	366	/* Output pid of zebra. */
	367	pid_output (pid_file);
	368
	369	/* Needed for BSD routing socket. */
	370	pid = getpid ();
	371
	372	/* Make vty server socket. */
4fc4e7ab	373	vty_serv_sock (vty_addr, vty_port, ZEBRA_VTYSH_PATH);
718e3744	374
887c44a4	375	/* Print banner. */
	376	zlog_notice ("Zebra %s starting: vty@%d", QUAGGA_VERSION, vty_port);
	377
b21b19c5	378	while (thread_fetch (zebrad.master, &thread))
718e3744	379	thread_call (&thread);
	380
	381	/* Not reached... */
	382	exit (0);
	383	}