1 /* zebra daemon main routine.
2 * Copyright (C) 1997, 98 Kunihiro Ishiguro
4 * This file is part of GNU Zebra.
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <lib/version.h>
29 #include "zebra_memory.h"
39 #include "zebra/zebra_router.h"
40 #include "zebra/zebra_errors.h"
41 #include "zebra/rib.h"
42 #include "zebra/zserv.h"
43 #include "zebra/debug.h"
44 #include "zebra/router-id.h"
45 #include "zebra/irdp.h"
46 #include "zebra/rtadv.h"
47 #include "zebra/zebra_ptm.h"
48 #include "zebra/zebra_ns.h"
49 #include "zebra/redistribute.h"
50 #include "zebra/zebra_mpls.h"
51 #include "zebra/label_manager.h"
52 #include "zebra/zebra_netns_notify.h"
53 #include "zebra/zebra_rnh.h"
54 #include "zebra/zebra_pbr.h"
55 #include "zebra/zebra_vxlan.h"
57 #if defined(HANDLE_NETLINK_FUZZING)
58 #include "zebra/kernel_netlink.h"
59 #endif /* HANDLE_NETLINK_FUZZING */
61 #define ZEBRA_PTM_SUPPORT
66 /* Pacify zclient.o in libfrr, which expects this variable. */
67 struct thread_master
*master
;
69 /* Route retain mode flag. */
72 /* Allow non-quagga entities to delete quagga routes */
77 bool v6_rr_semantics
= false;
80 /* Receive buffer size for netlink socket */
81 uint32_t nl_rcvbufsize
= 4194304;
82 #endif /* HAVE_NETLINK */
84 #define OPTION_V6_RR_SEMANTICS 2000
85 /* Command line options. */
86 const struct option longopts
[] = {
87 {"batch", no_argument
, NULL
, 'b'},
88 {"allow_delete", no_argument
, NULL
, 'a'},
89 {"keep_kernel", no_argument
, NULL
, 'k'},
90 {"socket", required_argument
, NULL
, 'z'},
91 {"ecmp", required_argument
, NULL
, 'e'},
92 {"retain", no_argument
, NULL
, 'r'},
93 {"vrfdefaultname", required_argument
, NULL
, 'o'},
94 {"graceful_restart", required_argument
, NULL
, 'K'},
96 {"vrfwnetns", no_argument
, NULL
, 'n'},
97 {"nl-bufsize", required_argument
, NULL
, 's'},
98 {"v6-rr-semantics", no_argument
, NULL
, OPTION_V6_RR_SEMANTICS
},
99 #endif /* HAVE_NETLINK */
102 zebra_capabilities_t _caps_p
[] = {
103 ZCAP_NET_ADMIN
, ZCAP_SYS_ADMIN
, ZCAP_NET_RAW
,
106 /* zebra privileges to run with */
107 struct zebra_privs_t zserv_privs
= {
108 #if defined(FRR_USER) && defined(FRR_GROUP)
113 .vty_group
= VTY_GROUP
,
116 .cap_num_p
= array_size(_caps_p
),
119 /* SIGHUP handler. */
120 static void sighup(void)
122 zlog_info("SIGHUP received");
124 /* Reload of config file. */
128 /* SIGINT handler. */
129 static void sigint(void)
132 struct zebra_vrf
*zvrf
;
133 struct listnode
*ln
, *nn
;
134 struct zserv
*client
;
135 static bool sigint_done
;
142 zlog_notice("Terminating on signal");
144 atomic_store_explicit(&zrouter
.in_shutdown
, true,
145 memory_order_relaxed
);
147 /* send RA lifetime of 0 before stopping. rfc4861/6.2.5 */
152 zebra_dplane_pre_finish();
154 /* Clean up GR related info. */
155 zebra_gr_stale_client_cleanup(zrouter
.stale_client_list
);
156 list_delete_all_node(zrouter
.stale_client_list
);
158 for (ALL_LIST_ELEMENTS(zrouter
.client_list
, ln
, nn
, client
))
159 zserv_close_client(client
);
162 list_delete_all_node(zrouter
.client_list
);
167 RB_FOREACH (vrf
, vrf_name_head
, &vrfs_by_name
) {
170 SET_FLAG(zvrf
->flags
, ZEBRA_VRF_RETAIN
);
172 if (zrouter
.lsp_process_q
)
173 work_queue_free_and_null(&zrouter
.lsp_process_q
);
177 ns_walk_func(zebra_ns_early_shutdown
);
178 zebra_ns_notify_close();
184 list_delete(&zrouter
.client_list
);
186 /* Indicate that all new dplane work has been enqueued. When that
187 * work is complete, the dataplane will enqueue an event
188 * with the 'finalize' function.
190 zebra_dplane_finish();
194 * Final shutdown step for the zebra main thread. This is run after all
195 * async update processing has completed.
197 int zebra_finalize(struct thread
*dummy
)
199 zlog_info("Zebra final shutdown");
201 /* Final shutdown of ns resources */
202 ns_walk_func(zebra_ns_final_shutdown
);
204 /* Stop dplane thread and finish any cleanup */
205 zebra_dplane_shutdown();
207 zebra_router_terminate();
213 /* SIGUSR1 handler. */
214 static void sigusr1(void)
219 struct quagga_signal_t zebra_signals
[] = {
238 static const struct frr_yang_module_info
*const zebra_yang_modules
[] = {
243 zebra
, ZEBRA
, .vty_port
= ZEBRA_VTY_PORT
, .flags
= FRR_NO_ZCLIENT
,
246 "Daemon which manages kernel routing table management "
247 "and\nredistribution between different routing protocols.",
249 .signals
= zebra_signals
, .n_signals
= array_size(zebra_signals
),
251 .privs
= &zserv_privs
,
253 .yang_modules
= zebra_yang_modules
,
254 .n_yang_modules
= array_size(zebra_yang_modules
), )
256 /* Main startup routine. */
257 int main(int argc
, char **argv
)
259 // int batch_mode = 0;
260 char *zserv_path
= NULL
;
261 char *vrf_default_name_configured
= NULL
;
262 struct sockaddr_storage dummy
;
264 #if defined(HANDLE_ZAPI_FUZZING)
265 char *zapi_fuzzing
= NULL
;
266 #endif /* HANDLE_ZAPI_FUZZING */
267 #if defined(HANDLE_NETLINK_FUZZING)
268 char *netlink_fuzzing
= NULL
;
269 #endif /* HANDLE_NETLINK_FUZZING */
271 graceful_restart
= 0;
272 vrf_configure_backend(VRF_BACKEND_VRF_LITE
);
274 frr_preinit(&zebra_di
, argc
, argv
);
281 #if defined(HANDLE_ZAPI_FUZZING)
283 #endif /* HANDLE_ZAPI_FUZZING */
284 #if defined(HANDLE_NETLINK_FUZZING)
286 #endif /* HANDLE_NETLINK_FUZZING */
289 " -b, --batch Runs in batch mode\n"
290 " -a, --allow_delete Allow other processes to delete zebra routes\n"
291 " -z, --socket Set path of zebra socket\n"
292 " -e, --ecmp Specify ECMP to use.\n"
293 " -r, --retain When program terminates, retain added route by zebra.\n"
294 " -o, --vrfdefaultname Set default VRF name.\n"
295 " -K, --graceful_restart Graceful restart at the kernel level, timer in seconds for expiration\n"
297 " -n, --vrfwnetns Use NetNS as VRF backend\n"
298 " -s, --nl-bufsize Set netlink receive buffer size\n"
299 " --v6-rr-semantics Use v6 RR semantics\n"
300 #endif /* HAVE_NETLINK */
301 #if defined(HANDLE_ZAPI_FUZZING)
302 " -c <file> Bypass normal startup and use this file for testing of zapi\n"
303 #endif /* HANDLE_ZAPI_FUZZING */
304 #if defined(HANDLE_NETLINK_FUZZING)
305 " -w <file> Bypass normal startup and use this file for testing of netlink input\n"
306 #endif /* HANDLE_NETLINK_FUZZING */
310 int opt
= frr_getopt(argc
, argv
, NULL
);
325 zrouter
.multipath_num
= atoi(optarg
);
326 if (zrouter
.multipath_num
> MULTIPATH_NUM
327 || zrouter
.multipath_num
<= 0) {
329 EC_ZEBRA_BAD_MULTIPATH_NUM
,
330 "Multipath Number specified must be less than %d and greater than 0",
336 vrf_default_name_configured
= optarg
;
340 if (!frr_zclient_addr(&dummy
, &dummylen
, optarg
)) {
342 "Invalid zserv socket path: %s\n",
351 graceful_restart
= atoi(optarg
);
355 nl_rcvbufsize
= atoi(optarg
);
358 vrf_configure_backend(VRF_BACKEND_NETNS
);
360 case OPTION_V6_RR_SEMANTICS
:
361 v6_rr_semantics
= true;
363 #endif /* HAVE_NETLINK */
364 #if defined(HANDLE_ZAPI_FUZZING)
366 zapi_fuzzing
= optarg
;
368 #endif /* HANDLE_ZAPI_FUZZING */
369 #if defined(HANDLE_NETLINK_FUZZING)
371 netlink_fuzzing
= optarg
;
372 /* This ensures we are aren't writing any of the
373 * startup netlink messages that happen when we
378 #endif /* HANDLE_NETLINK_FUZZING */
385 zrouter
.master
= frr_init();
387 /* Zebra related initialize. */
393 router_id_cmd_init();
396 * Initialize NS( and implicitly the VRF module), and make kernel
398 zebra_ns_init((const char *)vrf_default_name_configured
);
402 #if defined(HAVE_RTADV)
406 #ifdef ZEBRA_PTM_SUPPORT
411 zebra_mpls_vty_init();
415 /* For debug purpose. */
416 /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */
418 /* Process the configuration file. Among other configuration
419 * directives we can meet those installing static routes. Such
420 * requests will not be executed immediately, but queued in
421 * zebra->ribq structure until we enter the main execution loop.
422 * The notifications from kernel will show originating PID equal
423 * to that after daemon() completes (if ever called).
427 /* After we have successfully acquired the pidfile, we can be sure
428 * about being the only copy of zebra process, which is submitting
429 * changes to the FIB.
430 * Clean up zebra-originated routes. The requests will be sent to OS
431 * immediately, so originating PID in notifications from kernel
432 * will be equal to the current getpid(). To know about such routes,
433 * we have to have route_read() called before.
435 zrouter
.startup_time
= monotime(NULL
);
436 thread_add_timer(zrouter
.master
, rib_sweep_route
,
437 NULL
, graceful_restart
, NULL
);
439 /* Needed for BSD routing socket. */
442 /* Start dataplane system */
443 zebra_dplane_start();
445 /* Start Zebra API server */
446 zserv_start(zserv_path
);
448 /* Init label manager */
449 label_manager_init();
454 /* Config handler Init */
460 #if defined(HANDLE_ZAPI_FUZZING)
462 zserv_read_file(zapi_fuzzing
);
465 #endif /* HANDLE_ZAPI_FUZZING */
466 #if defined(HANDLE_NETLINK_FUZZING)
467 if (netlink_fuzzing
) {
468 netlink_read_init(netlink_fuzzing
);
471 #endif /* HANDLE_NETLINK_FUZZING */
474 frr_run(zrouter
.master
);