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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 "vrf.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"
- #include "zebra/zebra_fpm.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'},
- { "fpm_format", required_argument, NULL, 'F'},
- { "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 = array_size(_caps_p),
- .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"\
- "-F, --fpm_format Set fpm format to 'netlink' or 'protobuf'\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,
- },
- };
- /* Callback upon creating a new VRF. */
- static int
- zebra_vrf_new (vrf_id_t vrf_id, void **info)
- {
- struct zebra_vrf *zvrf = *info;
- if (! zvrf)
- {
- zvrf = zebra_vrf_alloc (vrf_id);
- *info = (void *)zvrf;
- router_id_init (zvrf);
- }
- return 0;
- }
- /* Callback upon enabling a VRF. */
- static int
- zebra_vrf_enable (vrf_id_t vrf_id, void **info)
- {
- struct zebra_vrf *zvrf = (struct zebra_vrf *) (*info);
- assert (zvrf);
- #if defined (HAVE_RTADV)
- rtadv_init (zvrf);
- #endif
- kernel_init (zvrf);
- interface_list (zvrf);
- route_read (zvrf);
- return 0;
- }
- /* Callback upon disabling a VRF. */
- static int
- zebra_vrf_disable (vrf_id_t vrf_id, void **info)
- {
- struct zebra_vrf *zvrf = (struct zebra_vrf *) (*info);
- struct listnode *list_node;
- struct interface *ifp;
- assert (zvrf);
- rib_close_table (zvrf->table[AFI_IP][SAFI_UNICAST]);
- rib_close_table (zvrf->table[AFI_IP6][SAFI_UNICAST]);
- for (ALL_LIST_ELEMENTS_RO (vrf_iflist (vrf_id), list_node, ifp))
- {
- int operative = if_is_operative (ifp);
- UNSET_FLAG (ifp->flags, IFF_UP);
- if (operative)
- if_down (ifp);
- }
- #if defined (HAVE_RTADV)
- rtadv_terminate (zvrf);
- #endif
- kernel_terminate (zvrf);
- list_delete_all_node (zvrf->rid_all_sorted_list);
- list_delete_all_node (zvrf->rid_lo_sorted_list);
- return 0;
- }
- /* Zebra VRF initialization. */
- static void
- zebra_vrf_init (void)
- {
- vrf_add_hook (VRF_NEW_HOOK, zebra_vrf_new);
- vrf_add_hook (VRF_ENABLE_HOOK, zebra_vrf_enable);
- vrf_add_hook (VRF_DISABLE_HOOK, zebra_vrf_disable);
- vrf_init ();
- }
- /* 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;
- char *zserv_path = NULL;
- char *fpm_format = 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:F:i:z:hA:P:ru:g:vs:C", longopts, 0);
- #else
- opt = getopt_long (argc, argv, "bdkf:F: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 'F':
- fpm_format = 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, array_size(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_cmd_init ();
- zebra_vty_init ();
- access_list_init ();
- prefix_list_init ();
- #if defined (HAVE_RTADV)
- rtadv_cmd_init ();
- #endif
- #ifdef HAVE_IRDP
- irdp_init();
- #endif
- /* For debug purpose. */
- /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */
- /* Initialize VRF module, and make kernel routing socket. */
- zebra_vrf_init ();
- #ifdef HAVE_SNMP
- zebra_snmp_init ();
- #endif /* HAVE_SNMP */
- #ifdef HAVE_FPM
- zfpm_init (zebrad.master, 1, 0, fpm_format);
- #else
- zfpm_init (zebrad.master, 0, 0, fpm_format);
- #endif
- /* 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);
- /* Count up events for interfaces */
- if_startup_count_up ();
- /* 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);
-
- thread_main (zebrad.master);
- return 0;
- }
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