main.c
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上传日期:2009-11-15
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文件大小:7k
- /*
- * 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 "version.h"
- #include "getopt.h"
- #include "command.h"
- #include "thread.h"
- #include "filter.h"
- #include "memory.h"
- #include "prefix.h"
- #include "log.h"
- #include "zebra/rib.h"
- #include "zebra/zserv.h"
- #include "zebra/debug.h"
- #include "zebra/rib.h"
- /* Master of threads. */
- struct thread_master *master;
- /* process id. */
- pid_t old_pid;
- pid_t pid;
- /* Route retain mode flag. */
- int retain_mode = 0;
- /* Don't delete kernel route. */
- int keep_kernel_mode = 0;
- /* 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'},
- { "version", no_argument, NULL, 'v'},
- { 0 }
- };
- /* Default configuration file path. */
- char config_current[] = DEFAULT_CONFIG_FILE;
- char config_default[] = SYSCONFDIR DEFAULT_CONFIG_FILE;
- /* Process ID saved for use by init system */
- 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...]nn
- Daemon which manages kernel routing table management and
- redistribution between different routing protocols.nn
- -b, --batch Runs in batch moden
- -d, --daemon Runs in daemon moden
- -f, --config_file Set configuration file namen
- -i, --pid_file Set process identifier file namen
- -k, --keep_kernel Don't delete old routes which installed by zebra.n
- -l, --log_mode Set verbose log mode flagn
- -A, --vty_addr Set vty's bind addressn
- -P, --vty_port Set vty's port numbern
- -r, --retain When program terminates, retain added route by zebra.n
- -v, --version Print program versionn
- -h, --help Display this help and exitn
- n
- Report bugs to %sn", progname, ZEBRA_BUG_ADDRESS);
- }
- exit (status);
- }
- /* SIGHUP handler. */
- void
- sighup (int sig)
- {
- zlog_info ("SIGHUP received");
- /* Reload of config file. */
- ;
- }
- /* SIGINT handler. */
- void
- sigint (int sig)
- {
- /* Decrared in rib.c */
- void rib_close ();
- zlog_info ("Terminating on signal");
- if (!retain_mode)
- rib_close ();
- #ifdef HAVE_IRDP
- irdp_finish();
- #endif
- 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);
- }
- /* Main startup routine. */
- int
- main (int argc, char **argv)
- {
- char *p;
- char *vty_addr = NULL;
- int vty_port = 0;
- 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_STDOUT, ZLOG_ZEBRA,
- LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
- while (1)
- {
- int opt;
-
- opt = getopt_long (argc, argv, "bdklf:hA:P:rv", longopts, 0);
- 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':
- vty_port = atoi (optarg);
- break;
- case 'r':
- retain_mode = 1;
- break;
- case 'v':
- print_version (progname);
- exit (0);
- break;
- case 'h':
- usage (progname, 0);
- break;
- default:
- usage (progname, 1);
- break;
- }
- }
- /* Make master thread emulator. */
- master = thread_master_create ();
- /* Vty related initialize. */
- signal_init ();
- cmd_init (1);
- vty_init ();
- memory_init ();
- /* Zebra related initialize. */
- zebra_init ();
- rib_init ();
- zebra_if_init ();
- zebra_debug_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_current, 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 ? vty_port : ZEBRA_VTY_PORT, ZEBRA_VTYSH_PATH);
- while (thread_fetch (master, &thread))
- thread_call (&thread);
- /* Not reached... */
- exit (0);
- }