[mirror_frr.git] / bgpd / bgp_main.c

/* Main routine of bgpd.
   Copyright (C) 1996, 97, 98, 1999 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 "vector.h"
#include "vty.h"
#include "command.h"
#include "getopt.h"
#include "thread.h"
#include "version.h"
#include "memory.h"
#include "prefix.h"
#include "log.h"

#include "bgpd/bgpd.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_mplsvpn.h"

/* bgpd options, we use GNU getopt library. */
struct option longopts[] = 
{
  { "daemon",      no_argument,       NULL, 'd'},
  { "config_file", required_argument, NULL, 'f'},
  { "pid_file",    required_argument, NULL, 'i'},
  { "bgp_port",    required_argument, NULL, 'p'},
  { "vty_addr",    required_argument, NULL, 'A'},
  { "vty_port",    required_argument, NULL, 'P'},
  { "retain",      no_argument,       NULL, 'r'},
  { "no_kernel",   no_argument,       NULL, 'n'},
  { "version",     no_argument,       NULL, 'v'},
  { "help",        no_argument,       NULL, 'h'},
  { 0 }
};

/* Configuration file and directory. */
char config_current[] = BGP_DEFAULT_CONFIG;
char config_default[] = SYSCONFDIR BGP_DEFAULT_CONFIG;

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

/* Master of threads. */
struct thread_master *master;

/* Manually specified configuration file name.  */
char *config_file = NULL;

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

/* VTY port number and address.  */
int vty_port = BGP_VTY_PORT;
char *vty_addr = NULL;

/* 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\
-d, --daemon       Runs in daemon mode\n\
-f, --config_file  Set configuration file name\n\
-i, --pid_file     Set process identifier file name\n\
-p, --bgp_port     Set bgp protocol's port number\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 bgpd.\n\
-n, --no_kernel    Do not install route to kernel.\n\
-v, --version      Print program version\n\
-h, --help         Display this help and exit\n\
\n\
Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
    }

  exit (status);
}
\f
/* SIGHUP handler. */
void 
sighup (int sig)
{
  zlog (NULL, LOG_INFO, "SIGHUP received");

  /* Terminate all thread. */
  bgp_terminate ();
  bgp_reset ();
  zlog_info ("bgpd restarting!");

  /* Reload config file. */
  vty_read_config (config_file, config_current, config_default);

  /* Create VTY's socket */
  vty_serv_sock (vty_addr, vty_port, BGP_VTYSH_PATH);

  /* Try to return to normal operation. */
}

/* SIGINT handler. */
void
sigint (int sig)
{
  zlog (NULL, LOG_INFO, "Terminating on signal");

  if (! retain_mode)
    bgp_terminate ();

  exit (0);
}

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

/* Signale wrapper. */
RETSIGTYPE *
signal_set (int signo, void (*func)(int))
{
  int ret;
  struct sigaction sig;
  struct sigaction osig;

  sig.sa_handler = func;
  sigemptyset (&sig.sa_mask);
  sig.sa_flags = 0;
#ifdef SA_RESTART
  sig.sa_flags |= SA_RESTART;
#endif /* SA_RESTART */

  ret = sigaction (signo, &sig, &osig);

  if (ret < 0) 
    return (SIG_ERR);
  else
    return (osig.sa_handler);
}

/* Initialization of signal handles. */
void
signal_init ()
{
  signal_set (SIGHUP, sighup);
  signal_set (SIGINT, sigint);
  signal_set (SIGTERM, sigint);
  signal_set (SIGPIPE, SIG_IGN);
  signal_set (SIGUSR1, sigusr1);
}
\f
/* Main routine of bgpd. Treatment of argument and start bgp finite
   state machine is handled at here. */
int
main (int argc, char **argv)
{
  char *p;
  int opt;
  int daemon_mode = 0;
  char *progname;
  struct thread thread;

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

  /* Preserve name of myself. */
  progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);

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

  /* BGP master init. */
  bgp_master_init ();

  /* Command line argument treatment. */
  while (1) 
    {
      opt = getopt_long (argc, argv, "df:hp:A:P:rnv", longopts, 0);
    
      if (opt == EOF)
	break;

      switch (opt) 
	{
	case 0:
	  break;
	case 'd':
	  daemon_mode = 1;
	  break;
	case 'f':
	  config_file = optarg;
	  break;
        case 'i':
          pid_file = optarg;
          break;
	case 'p':
	  bm->port = atoi (optarg);
	  break;
	case 'A':
	  vty_addr = optarg;
	  break;
	case 'P':
          /* Deal with atoi() returning 0 on failure, and bgpd not
             listening on bgp port... */
          if (strcmp(optarg, "0") == 0) 
            {
              vty_port = 0;
              break;
            } 
          vty_port = atoi (optarg);
          vty_port = (vty_port ? vty_port : BGP_VTY_PORT);
	  break;
	case 'r':
	  retain_mode = 1;
	  break;
	case 'n':
	  bgp_option_set (BGP_OPT_NO_FIB);
	  break;
	case 'v':
	  print_version (progname);
	  exit (0);
	  break;
	case 'h':
	  usage (progname, 0);
	  break;
	default:
	  usage (progname, 1);
	  break;
	}
    }

  /* Make thread master. */
  master = bm->master;

  /* Initializations. */
  srand (time (NULL));
  signal_init ();
  cmd_init (1);
  vty_init ();
  memory_init ();

  /* BGP related initialization.  */
  bgp_init ();

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

  /* Parse config file. */
  vty_read_config (config_file, config_current, config_default);

  /* Turn into daemon if daemon_mode is set. */
  if (daemon_mode)
    daemon (0, 0);

  /* Process ID file creation. */
  pid_output (pid_file);

  /* Make bgp vty socket. */
  vty_serv_sock (vty_addr, vty_port, BGP_VTYSH_PATH);

  /* Print banner. */
  zlog_info ("BGPd %s starting: vty@%d, bgp@%d", ZEBRA_VERSION,
	     vty_port, bm->port);

  /* Start finite state machine, here we go! */
  while (thread_fetch (master, &thread))
    thread_call (&thread);

  /* Not reached. */
  exit (0);
}
Commit	Line	Data
718e3744	1	/* Main routine of bgpd.
	2	Copyright (C) 1996, 97, 98, 1999 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	#include <zebra.h>
	22
	23	#include "vector.h"
	24	#include "vty.h"
	25	#include "command.h"
	26	#include "getopt.h"
	27	#include "thread.h"
	28	#include "version.h"
	29	#include "memory.h"
	30	#include "prefix.h"
	31	#include "log.h"
	32
	33	#include "bgpd/bgpd.h"
	34	#include "bgpd/bgp_attr.h"
	35	#include "bgpd/bgp_mplsvpn.h"
	36
	37	/* bgpd options, we use GNU getopt library. */
	38	struct option longopts[] =
	39	{
	40	{ "daemon", no_argument, NULL, 'd'},
	41	{ "config_file", required_argument, NULL, 'f'},
	42	{ "pid_file", required_argument, NULL, 'i'},
	43	{ "bgp_port", required_argument, NULL, 'p'},
	44	{ "vty_addr", required_argument, NULL, 'A'},
	45	{ "vty_port", required_argument, NULL, 'P'},
	46	{ "retain", no_argument, NULL, 'r'},
	47	{ "no_kernel", no_argument, NULL, 'n'},
	48	{ "version", no_argument, NULL, 'v'},
	49	{ "help", no_argument, NULL, 'h'},
	50	{ 0 }
	51	};
	52
	53	/* Configuration file and directory. */
	54	char config_current[] = BGP_DEFAULT_CONFIG;
	55	char config_default[] = SYSCONFDIR BGP_DEFAULT_CONFIG;
	56
	57	/* Route retain mode flag. */
	58	int retain_mode = 0;
	59
	60	/* Master of threads. */
	61	struct thread_master *master;
	62
	63	/* Manually specified configuration file name. */
	64	char *config_file = NULL;
65
66	/* Process ID saved for use by init system */
67	char *pid_file = PATH_BGPD_PID;
68
69	/* VTY port number and address. */
70	int vty_port = BGP_VTY_PORT;
71	char *vty_addr = NULL;
72
73	/* Help information display. */
74	static void
75	usage (char *progname, int status)
76	{
77	if (status != 0)
78	fprintf (stderr, "Try `%s --help' for more information.\n", progname);
79	else
80	{
81	printf ("Usage : %s [OPTION...]\n\n\
82	Daemon which manages kernel routing table management and \
83	redistribution between different routing protocols.\n\n\
84	-d, --daemon Runs in daemon mode\n\
85	-f, --config_file Set configuration file name\n\
86	-i, --pid_file Set process identifier file name\n\
87	-p, --bgp_port Set bgp protocol's port number\n\
88	-A, --vty_addr Set vty's bind address\n\
89	-P, --vty_port Set vty's port number\n\
90	-r, --retain When program terminates, retain added route by bgpd.\n\
91	-n, --no_kernel Do not install route to kernel.\n\
92	-v, --version Print program version\n\
93	-h, --help Display this help and exit\n\
94	\n\
95	Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
96	}
97
98	exit (status);
99	}
100	\f
101	/* SIGHUP handler. */
102	void
103	sighup (int sig)
104	{
105	zlog (NULL, LOG_INFO, "SIGHUP received");
106
107	/* Terminate all thread. */
108	bgp_terminate ();
109	bgp_reset ();
110	zlog_info ("bgpd restarting!");
111
112	/* Reload config file. */
113	vty_read_config (config_file, config_current, config_default);
114
115	/* Create VTY's socket */
4fc4e7ab	116	vty_serv_sock (vty_addr, vty_port, BGP_VTYSH_PATH);
718e3744	117
	118	/* Try to return to normal operation. */
	119	}
	120
	121	/* SIGINT handler. */
	122	void
	123	sigint (int sig)
	124	{
	125	zlog (NULL, LOG_INFO, "Terminating on signal");
	126
	127	if (! retain_mode)
	128	bgp_terminate ();
	129
	130	exit (0);
	131	}
	132
	133	/* SIGUSR1 handler. */
	134	void
	135	sigusr1 (int sig)
	136	{
	137	zlog_rotate (NULL);
	138	}
	139
	140	/* Signale wrapper. */
	141	RETSIGTYPE *
	142	signal_set (int signo, void (*func)(int))
	143	{
	144	int ret;
	145	struct sigaction sig;
	146	struct sigaction osig;
	147
	148	sig.sa_handler = func;
	149	sigemptyset (&sig.sa_mask);
	150	sig.sa_flags = 0;
	151	#ifdef SA_RESTART
	152	sig.sa_flags \|= SA_RESTART;
	153	#endif /* SA_RESTART */
	154
	155	ret = sigaction (signo, &sig, &osig);
	156
	157	if (ret < 0)
	158	return (SIG_ERR);
	159	else
	160	return (osig.sa_handler);
	161	}
	162
	163	/* Initialization of signal handles. */
	164	void
	165	signal_init ()
	166	{
	167	signal_set (SIGHUP, sighup);
	168	signal_set (SIGINT, sigint);
	169	signal_set (SIGTERM, sigint);
	170	signal_set (SIGPIPE, SIG_IGN);
	171	signal_set (SIGUSR1, sigusr1);
	172	}
	173	\f
	174	/* Main routine of bgpd. Treatment of argument and start bgp finite
	175	state machine is handled at here. */
	176	int
	177	main (int argc, char **argv)
	178	{
	179	char *p;
	180	int opt;
181	int daemon_mode = 0;
182	char *progname;
183	struct thread thread;
184
185	/* Set umask before anything for security */
186	umask (0027);
187
188	/* Preserve name of myself. */
189	progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
190
191	zlog_default = openzlog (progname, ZLOG_NOLOG, ZLOG_BGP,
192	LOG_CONS\|LOG_NDELAY\|LOG_PID, LOG_DAEMON);
193
194	/* BGP master init. */
195	bgp_master_init ();
196
197	/* Command line argument treatment. */
198	while (1)
199	{
200	opt = getopt_long (argc, argv, "df:hp:A:P:rnv", longopts, 0);
201
202	if (opt == EOF)
203	break;
204
205	switch (opt)
206	{
207	case 0:
208	break;
209	case 'd':
210	daemon_mode = 1;
211	break;
212	case 'f':
213	config_file = optarg;
214	break;
215	case 'i':
216	pid_file = optarg;
217	break;
218	case 'p':
219	bm->port = atoi (optarg);
220	break;
221	case 'A':
222	vty_addr = optarg;
223	break;
224	case 'P':
4fc4e7ab	225	/* Deal with atoi() returning 0 on failure, and bgpd not
	226	listening on bgp port... */
	227	if (strcmp(optarg, "0") == 0)
	228	{
	229	vty_port = 0;
	230	break;
	231	}
	232	vty_port = atoi (optarg);
	233	vty_port = (vty_port ? vty_port : BGP_VTY_PORT);
718e3744	234	break;
	235	case 'r':
	236	retain_mode = 1;
	237	break;
	238	case 'n':
	239	bgp_option_set (BGP_OPT_NO_FIB);
	240	break;
	241	case 'v':
	242	print_version (progname);
	243	exit (0);
	244	break;
	245	case 'h':
	246	usage (progname, 0);
	247	break;
	248	default:
	249	usage (progname, 1);
	250	break;
	251	}
	252	}
	253
	254	/* Make thread master. */
	255	master = bm->master;
	256
	257	/* Initializations. */
	258	srand (time (NULL));
	259	signal_init ();
	260	cmd_init (1);
	261	vty_init ();
	262	memory_init ();
	263
	264	/* BGP related initialization. */
	265	bgp_init ();
	266
	267	/* Sort CLI commands. */
	268	sort_node ();
	269
	270	/* Parse config file. */
	271	vty_read_config (config_file, config_current, config_default);
	272
	273	/* Turn into daemon if daemon_mode is set. */
	274	if (daemon_mode)
	275	daemon (0, 0);
	276
	277	/* Process ID file creation. */
	278	pid_output (pid_file);
	279
	280	/* Make bgp vty socket. */
	281	vty_serv_sock (vty_addr, vty_port, BGP_VTYSH_PATH);
	282
	283	/* Print banner. */
	284	zlog_info ("BGPd %s starting: vty@%d, bgp@%d", ZEBRA_VERSION,
	285	vty_port, bm->port);
	286
	287	/* Start finite state machine, here we go! */
	288	while (thread_fetch (master, &thread))
	289	thread_call (&thread);
	290
	291	/* Not reached. */
	292	exit (0);
	293	}