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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 this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include <lib/version.h>
#include "getopt.h"
#include "command.h"
#include "thread.h"
#include "filter.h"
#include "memory.h"
#include "zebra_memory.h"
#include "memory_vty.h"
#include "prefix.h"
#include "log.h"
#include "plist.h"
#include "privs.h"
#include "sigevent.h"
#include "vrf.h"
#include "logicalrouter.h"
#include "libfrr.h"
#include "routemap.h"
#include "frr_pthread.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_ptm.h"
#include "zebra/zebra_ns.h"
#include "zebra/redistribute.h"
#include "zebra/zebra_mpls.h"
#include "zebra/label_manager.h"
#include "zebra/zebra_netns_notify.h"
#include "zebra/zebra_rnh.h"
#include "zebra/zebra_pbr.h"
#define ZEBRA_PTM_SUPPORT
/* Zebra instance */
struct zebra_t zebrad = {
.rtm_table_default = 0,
.packets_to_process = ZEBRA_ZAPI_PACKETS_TO_PROCESS,
};
/* process id. */
pid_t pid;
/* Pacify zclient.o in libfrr, which expects this variable. */
struct thread_master *master;
/* Route retain mode flag. */
int retain_mode = 0;
/* Allow non-quagga entities to delete quagga routes */
int allow_delete = 0;
/* Don't delete kernel route. */
int keep_kernel_mode = 0;
bool v6_rr_semantics = false;
#ifdef HAVE_NETLINK
/* Receive buffer size for netlink socket */
uint32_t nl_rcvbufsize = 4194304;
#endif /* HAVE_NETLINK */
#define OPTION_V6_RR_SEMANTICS 2000
/* Command line options. */
struct option longopts[] = {
{"batch", no_argument, NULL, 'b'},
{"allow_delete", no_argument, NULL, 'a'},
{"keep_kernel", no_argument, NULL, 'k'},
{"socket", required_argument, NULL, 'z'},
{"ecmp", required_argument, NULL, 'e'},
{"label_socket", no_argument, NULL, 'l'},
{"retain", no_argument, NULL, 'r'},
#ifdef HAVE_NETLINK
{"vrfwnetns", no_argument, NULL, 'n'},
{"nl-bufsize", required_argument, NULL, 's'},
{"v6-rr-semantics", no_argument, NULL, OPTION_V6_RR_SEMANTICS},
#endif /* HAVE_NETLINK */
{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(FRR_USER) && defined(FRR_GROUP)
.user = FRR_USER,
.group = FRR_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};
unsigned int multipath_num = MULTIPATH_NUM;
/* SIGHUP handler. */
static void sighup(void)
{
zlog_info("SIGHUP received");
/* Reload of config file. */
;
}
/* SIGINT handler. */
static void sigint(void)
{
struct vrf *vrf;
struct zebra_vrf *zvrf;
zlog_notice("Terminating on signal");
frr_early_fini();
list_delete_all_node(zebrad.client_list);
zebra_ptm_finish();
if (retain_mode)
RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
zvrf = vrf->info;
if (zvrf)
SET_FLAG(zvrf->flags, ZEBRA_VRF_RETAIN);
}
if (zebrad.lsp_process_q)
work_queue_free_and_null(&zebrad.lsp_process_q);
vrf_terminate();
ns_walk_func(zebra_ns_disabled);
zebra_ns_notify_close();
access_list_reset();
prefix_list_reset();
route_map_finish();
list_delete_and_null(&zebrad.client_list);
work_queue_free_and_null(&zebrad.ribq);
meta_queue_free(zebrad.mq);
frr_fini();
exit(0);
}
/* SIGUSR1 handler. */
static void sigusr1(void)
{
zlog_rotate();
}
struct quagga_signal_t zebra_signals[] = {
{
.signal = SIGHUP,
.handler = &sighup,
},
{
.signal = SIGUSR1,
.handler = &sigusr1,
},
{
.signal = SIGINT,
.handler = &sigint,
},
{
.signal = SIGTERM,
.handler = &sigint,
},
};
FRR_DAEMON_INFO(
zebra, ZEBRA, .vty_port = ZEBRA_VTY_PORT, .flags = FRR_NO_ZCLIENT,
.proghelp =
"Daemon which manages kernel routing table management "
"and\nredistribution between different routing protocols.",
.signals = zebra_signals, .n_signals = array_size(zebra_signals),
.privs = &zserv_privs, )
/* Main startup routine. */
int main(int argc, char **argv)
{
// int batch_mode = 0;
char *zserv_path = NULL;
/* Socket to external label manager */
char *lblmgr_path = NULL;
struct sockaddr_storage dummy;
socklen_t dummylen;
#if defined(HANDLE_ZAPI_FUZZING)
char *fuzzing = NULL;
#endif
vrf_configure_backend(VRF_BACKEND_VRF_LITE);
logicalrouter_configure_backend(LOGICALROUTER_BACKEND_NETNS);
frr_preinit(&zebra_di, argc, argv);
frr_opt_add(
"bakz:e:l:r"
#ifdef HAVE_NETLINK
"s:n"
#endif
#if defined(HANDLE_ZAPI_FUZZING)
"c:"
#endif
,
longopts,
" -b, --batch Runs in batch mode\n"
" -a, --allow_delete Allow other processes to delete zebra routes\n"
" -z, --socket Set path of zebra socket\n"
" -e, --ecmp Specify ECMP to use.\n"
" -l, --label_socket Socket to external label manager\n"
" -k, --keep_kernel Don't delete old routes which installed by zebra.\n"
" -r, --retain When program terminates, retain added route by zebra.\n"
#ifdef HAVE_NETLINK
" -n, --vrfwnetns Set VRF with NetNS\n"
" -s, --nl-bufsize Set netlink receive buffer size\n"
" --v6-rr-semantics Use v6 RR semantics\n"
#endif /* HAVE_NETLINK */
#if defined(HANDLE_ZAPI_FUZZING)
" -c <file> Bypass normal startup use this file for tetsting of zapi"
#endif
);
while (1) {
int opt = frr_getopt(argc, argv, NULL);
if (opt == EOF)
break;
switch (opt) {
case 0:
break;
case 'b':
// batch_mode = 1;
break;
case 'a':
allow_delete = 1;
break;
case 'k':
keep_kernel_mode = 1;
break;
case 'e':
multipath_num = atoi(optarg);
if (multipath_num > MULTIPATH_NUM
|| multipath_num <= 0) {
zlog_err(
"Multipath Number specified must be less than %d and greater than 0",
MULTIPATH_NUM);
return 1;
}
break;
case 'z':
zserv_path = optarg;
if (!frr_zclient_addr(&dummy, &dummylen, optarg)) {
fprintf(stderr,
"Invalid zserv socket path: %s\n",
optarg);
exit(1);
}
break;
case 'l':
lblmgr_path = optarg;
break;
case 'r':
retain_mode = 1;
break;
#ifdef HAVE_NETLINK
case 's':
nl_rcvbufsize = atoi(optarg);
break;
case 'n':
vrf_configure_backend(VRF_BACKEND_NETNS);
logicalrouter_configure_backend(
LOGICALROUTER_BACKEND_OFF);
break;
case OPTION_V6_RR_SEMANTICS:
v6_rr_semantics = true;
break;
#endif /* HAVE_NETLINK */
#if defined(HANDLE_ZAPI_FUZZING)
case 'c':
fuzzing = optarg;
break;
#endif
default:
frr_help_exit(1);
break;
}
}
vty_config_lockless();
zebrad.master = frr_init();
/* Zebra related initialize. */
zserv_init();
rib_init();
zebra_if_init();
zebra_debug_init();
router_id_cmd_init();
/*
* Initialize NS( and implicitly the VRF module), and make kernel
* routing socket. */
zebra_ns_init();
zebra_vty_init();
access_list_init();
prefix_list_init();
#if defined(HAVE_RTADV)
rtadv_cmd_init();
#endif
/* PTM socket */
#ifdef ZEBRA_PTM_SUPPORT
zebra_ptm_init();
#endif
zebra_mpls_init();
zebra_mpls_vty_init();
zebra_pw_vty_init();
zebra_pbr_init();
/* For debug purpose. */
/* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */
#if defined(HANDLE_ZAPI_FUZZING)
if (fuzzing) {
zserv_read_file(fuzzing);
exit(0);
}
#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).
*/
frr_config_fork();
/* 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();
frr_pthread_init();
/* This must be done only after locking pidfile (bug #403). */
zebra_zserv_socket_init(zserv_path);
/* Init label manager */
label_manager_init(lblmgr_path);
/* RNH init */
zebra_rnh_init();
frr_run(zebrad.master);
/* Not reached... */
return 0;
}
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