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/* 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 "plist.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"
#include "zebra/rtadv.h"
/* Zebra instance */
struct zebra_t zebrad =
{
.rtm_table_default = 0,
};
/* process id. */
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'},
{ "config_file", required_argument, NULL, 'f'},
{ "pid_file", required_argument, NULL, 'i'},
{ "socket", required_argument, NULL, 'z'},
{ "help", no_argument, NULL, 'h'},
{ "vty_addr", required_argument, NULL, 'A'},
{ "vty_port", required_argument, NULL, 'P'},
{ "retain", no_argument, NULL, 'r'},
{ "dryrun", no_argument, NULL, 'C'},
#ifdef HAVE_NETLINK
{ "nl-bufsize", required_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_NET_ADMIN,
ZCAP_SYS_ADMIN,
ZCAP_NET_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"\
"-z, --socket Set path of zebra socket\n"\
"-k, --keep_kernel Don't delete old routes which installed by "\
"zebra.\n"\
"-C, --dryrun Check configuration for validity and exit\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);
}
/* SIGHUP handler. */
static void
sighup (void)
{
zlog_info ("SIGHUP received");
/* Reload of config file. */
;
}
/* SIGINT handler. */
static void
sigint (void)
{
zlog_notice ("Terminating on signal");
if (!retain_mode)
rib_close ();
#ifdef HAVE_IRDP
irdp_finish();
#endif
exit (0);
}
/* SIGUSR1 handler. */
static 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,
},
};
/* Main startup routine. */
int
main (int argc, char **argv)
{
char *p;
char *vty_addr = NULL;
int vty_port = ZEBRA_VTY_PORT;
int dryrun = 0;
int batch_mode = 0;
int daemon_mode = 0;
char *config_file = NULL;
char *progname;
struct thread thread;
char *zserv_path = NULL;
/* 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, "bdkf:i:z:hA:P:ru:g:vs:C", longopts, 0);
#else
opt = getopt_long (argc, argv, "bdkf:i:z:hA:P:ru:g:vC", 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 'C':
dryrun = 1;
break;
case 'f':
config_file = optarg;
break;
case 'A':
vty_addr = optarg;
break;
case 'i':
pid_file = optarg;
break;
case 'z':
zserv_path = 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);
if (vty_port <= 0 || vty_port > 0xffff)
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 ();
prefix_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 */
/* Process the configuration file. Among other configuration
* directives we can meet those installing static routes. Such
* requests will not be executed immediately, but queued in
* zebra->ribq structure until we enter the main execution loop.
* The notifications from kernel will show originating PID equal
* to that after daemon() completes (if ever called).
*/
vty_read_config (config_file, config_default);
/* Don't start execution if we are in dry-run mode */
if (dryrun)
return(0);
/* Clean up rib. */
rib_weed_tables ();
/* Exit when zebra is working in batch mode. */
if (batch_mode)
exit (0);
/* Daemonize. */
if (daemon_mode && daemon (0, 0) < 0)
{
zlog_err("Zebra daemon failed: %s", strerror(errno));
exit (1);
}
/* Output pid of zebra. */
pid_output (pid_file);
/* After we have successfully acquired the pidfile, we can be sure
* about being the only copy of zebra process, which is submitting
* changes to the FIB.
* Clean up zebra-originated routes. The requests will be sent to OS
* immediately, so originating PID in notifications from kernel
* will be equal to the current getpid(). To know about such routes,
* we have to have route_read() called before.
*/
if (! keep_kernel_mode)
rib_sweep_route ();
/* Needed for BSD routing socket. */
pid = getpid ();
/* This must be done only after locking pidfile (bug #403). */
zebra_zserv_socket_init (zserv_path);
/* 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... */
return 0;
}
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