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-rw-r--r--bgpd/bgp_main.c285
1 files changed, 285 insertions, 0 deletions
diff --git a/bgpd/bgp_main.c b/bgpd/bgp_main.c
new file mode 100644
index 000000000..7fc68fa76
--- /dev/null
+++ b/bgpd/bgp_main.c
@@ -0,0 +1,285 @@
+/* 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);
+}
+
+/* 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 ? vty_port : BGP_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);
+}
+
+/* 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':
+ vty_port = atoi (optarg);
+ 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);
+}
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