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/*
* IS-IS Rout(e)ing protocol - isis_main.c
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public Licenseas 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.
*/
#include <zebra.h>
#include "getopt.h"
#include "thread.h"
#include "log.h"
#include <lib/version.h>
#include "command.h"
#include "vty.h"
#include "memory.h"
#include "stream.h"
#include "if.h"
#include "privs.h"
#include "sigevent.h"
#include "filter.h"
#include "plist.h"
#include "zclient.h"
#include "isisd/dict.h"
#include "include-netbsd/iso.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_flags.h"
#include "isisd/isis_circuit.h"
#include "isisd/isisd.h"
#include "isisd/isis_dynhn.h"
#include "isisd/isis_spf.h"
#include "isisd/isis_route.h"
#include "isisd/isis_routemap.h"
#include "isisd/isis_zebra.h"
/* Default configuration file name */
#define ISISD_DEFAULT_CONFIG "isisd.conf"
/* Default vty port */
#define ISISD_VTY_PORT 2608
/* isisd privileges */
zebra_capabilities_t _caps_p[] = {
ZCAP_NET_RAW,
ZCAP_BIND
};
struct zebra_privs_t isisd_privs = {
#if defined(QUAGGA_USER)
.user = QUAGGA_USER,
#endif
#if defined QUAGGA_GROUP
.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),
.cap_num_i = 0
};
/* isisd options */
struct option longopts[] = {
{"daemon", no_argument, NULL, 'd'},
{"config_file", required_argument, NULL, 'f'},
{"pid_file", required_argument, NULL, 'i'},
{"socket", required_argument, NULL, 'z'},
{"vty_addr", required_argument, NULL, 'A'},
{"vty_port", required_argument, NULL, 'P'},
{"user", required_argument, NULL, 'u'},
{"group", required_argument, NULL, 'g'},
{"version", no_argument, NULL, 'v'},
{"dryrun", no_argument, NULL, 'C'},
{"help", no_argument, NULL, 'h'},
{0}
};
/* Configuration file and directory. */
char config_default[] = SYSCONFDIR ISISD_DEFAULT_CONFIG;
char *config_file = NULL;
/* isisd program name. */
char *progname;
int daemon_mode = 0;
/* Master of threads. */
struct thread_master *master;
/* Process ID saved for use by init system */
const char *pid_file = PATH_ISISD_PID;
/* for reload */
char _cwd[MAXPATHLEN];
char _progpath[MAXPATHLEN];
int _argc;
char **_argv;
char **_envp;
/*
* Prototypes.
*/
void reload(void);
void sighup(void);
void sigint(void);
void sigterm(void);
void sigusr1(void);
/* Help information display. */
static void
usage (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 IS-IS routing\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\
-z, --socket Set path of zebra socket\n\
-A, --vty_addr Set vty's bind address\n\
-P, --vty_port Set vty's port number\n\
-u, --user User to run as\n\
-g, --group Group to run as\n\
-v, --version Print program version\n\
-C, --dryrun Check configuration for validity and exit\n\
-h, --help Display this help and exit\n\
\n\
Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
}
exit (status);
}
void
reload ()
{
zlog_debug ("Reload");
/* FIXME: Clean up func call here */
vty_reset ();
(void) isisd_privs.change (ZPRIVS_RAISE);
execve (_progpath, _argv, _envp);
zlog_err ("Reload failed: cannot exec %s: %s", _progpath,
safe_strerror (errno));
}
static void
terminate (int i)
{
exit (i);
}
/*
* Signal handlers
*/
void
sighup (void)
{
zlog_debug ("SIGHUP received");
reload ();
return;
}
void
sigint (void)
{
zlog_notice ("Terminating on signal SIGINT");
terminate (0);
}
void
sigterm (void)
{
zlog_notice ("Terminating on signal SIGTERM");
terminate (0);
}
void
sigusr1 (void)
{
zlog_debug ("SIGUSR1 received");
zlog_rotate (NULL);
}
struct quagga_signal_t isisd_signals[] =
{
{
.signal = SIGHUP,
.handler = &sighup,
},
{
.signal = SIGUSR1,
.handler = &sigusr1,
},
{
.signal = SIGINT,
.handler = &sigint,
},
{
.signal = SIGTERM,
.handler = &sigterm,
},
};
/*
* Main routine of isisd. Parse arguments and handle IS-IS state machine.
*/
int
main (int argc, char **argv, char **envp)
{
char *p;
int opt, vty_port = ISISD_VTY_PORT;
struct thread thread;
char *config_file = NULL;
char *vty_addr = NULL;
int dryrun = 0;
/* Get the programname without the preceding path. */
progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
zlog_default = openzlog (progname, ZLOG_ISIS,
LOG_CONS | LOG_NDELAY | LOG_PID, LOG_DAEMON);
/* for reload */
_argc = argc;
_argv = argv;
_envp = envp;
getcwd (_cwd, sizeof (_cwd));
if (*argv[0] == '.')
snprintf (_progpath, sizeof (_progpath), "%s/%s", _cwd, _argv[0]);
else
snprintf (_progpath, sizeof (_progpath), "%s", argv[0]);
/* Command line argument treatment. */
while (1)
{
opt = getopt_long (argc, argv, "df:i:z:hA:p:P:u:g:vC", 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 'z':
zclient_serv_path_set (optarg);
break;
case 'A':
vty_addr = optarg;
break;
case 'P':
/* Deal with atoi() returning 0 on failure, and isisd not
listening on isisd port... */
if (strcmp (optarg, "0") == 0)
{
vty_port = 0;
break;
}
vty_port = atoi (optarg);
vty_port = (vty_port ? vty_port : ISISD_VTY_PORT);
break;
case 'u':
isisd_privs.user = optarg;
break;
case 'g':
isisd_privs.group = optarg;
break;
case 'v':
printf ("ISISd version %s\n", ISISD_VERSION);
printf ("Copyright (c) 2001-2002 Sampo Saaristo,"
" Ofer Wald and Hannes Gredler\n");
print_version ("Zebra");
exit (0);
break;
case 'C':
dryrun = 1;
break;
case 'h':
usage (0);
break;
default:
usage (1);
break;
}
}
/* thread master */
master = thread_master_create ();
/* random seed from time */
srand (time (NULL));
/*
* initializations
*/
zprivs_init (&isisd_privs);
signal_init (master, array_size (isisd_signals), isisd_signals);
cmd_init (1);
vty_init (master);
memory_init ();
access_list_init();
prefix_list_init();
isis_init ();
isis_circuit_init ();
isis_spf_cmds_init ();
isis_redist_init ();
isis_route_map_init();
/* create the global 'isis' instance */
isis_new (1);
isis_zebra_init ();
/* parse config file */
/* this is needed three times! because we have interfaces before the areas */
vty_read_config (config_file, config_default);
/* Start execution only if not in dry-run mode */
if (dryrun)
return(0);
/* demonize */
if (daemon_mode)
daemon (0, 0);
/* Process ID file creation. */
if (pid_file[0] != '\0')
pid_output (pid_file);
/* Make isis vty socket. */
vty_serv_sock (vty_addr, vty_port, ISIS_VTYSH_PATH);
/* Print banner. */
zlog_notice ("Quagga-ISISd %s starting: vty@%d", QUAGGA_VERSION, vty_port);
/* Start finite state machine. */
while (thread_fetch (master, &thread))
thread_call (&thread);
/* Not reached. */
exit (0);
}
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