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"
30 #include "memory_vty.h"
39 #include "frr_pthread.h"
41 #include "zebra/zebra_router.h"
42 #include "zebra/zebra_errors.h"
43 #include "zebra/rib.h"
44 #include "zebra/zserv.h"
45 #include "zebra/debug.h"
46 #include "zebra/router-id.h"
47 #include "zebra/irdp.h"
48 #include "zebra/rtadv.h"
49 #include "zebra/zebra_ptm.h"
50 #include "zebra/zebra_ns.h"
51 #include "zebra/redistribute.h"
52 #include "zebra/zebra_mpls.h"
53 #include "zebra/label_manager.h"
54 #include "zebra/zebra_netns_notify.h"
55 #include "zebra/zebra_rnh.h"
56 #include "zebra/zebra_pbr.h"
57 #include "zebra/zebra_vxlan.h"
59 #if defined(HANDLE_NETLINK_FUZZING)
60 #include "zebra/kernel_netlink.h"
61 #endif /* HANDLE_NETLINK_FUZZING */
63 #define ZEBRA_PTM_SUPPORT
68 /* Pacify zclient.o in libfrr, which expects this variable. */
69 struct thread_master
*master
;
71 /* Route retain mode flag. */
74 /* Allow non-quagga entities to delete quagga routes */
79 bool v6_rr_semantics
= false;
82 /* Receive buffer size for netlink socket */
83 uint32_t nl_rcvbufsize
= 4194304;
84 #endif /* HAVE_NETLINK */
86 #define OPTION_V6_RR_SEMANTICS 2000
87 /* Command line options. */
88 struct option longopts
[] = {
89 {"batch", no_argument
, NULL
, 'b'},
90 {"allow_delete", no_argument
, NULL
, 'a'},
91 {"keep_kernel", no_argument
, NULL
, 'k'},
92 {"socket", required_argument
, NULL
, 'z'},
93 {"ecmp", required_argument
, NULL
, 'e'},
94 {"retain", no_argument
, NULL
, 'r'},
95 {"vrfdefaultname", required_argument
, NULL
, 'o'},
96 {"graceful_restart", required_argument
, NULL
, 'K'},
98 {"vrfwnetns", no_argument
, NULL
, 'n'},
99 {"nl-bufsize", required_argument
, NULL
, 's'},
100 {"v6-rr-semantics", no_argument
, NULL
, OPTION_V6_RR_SEMANTICS
},
101 #endif /* HAVE_NETLINK */
104 zebra_capabilities_t _caps_p
[] = {
105 ZCAP_NET_ADMIN
, ZCAP_SYS_ADMIN
, ZCAP_NET_RAW
,
108 /* zebra privileges to run with */
109 struct zebra_privs_t zserv_privs
= {
110 #if defined(FRR_USER) && defined(FRR_GROUP)
115 .vty_group
= VTY_GROUP
,
118 .cap_num_p
= array_size(_caps_p
),
121 /* SIGHUP handler. */
122 static void sighup(void)
124 zlog_info("SIGHUP received");
126 /* Reload of config file. */
130 /* SIGINT handler. */
131 static void sigint(void)
134 struct zebra_vrf
*zvrf
;
135 struct listnode
*ln
, *nn
;
136 struct zserv
*client
;
137 static bool sigint_done
;
144 zlog_notice("Terminating on signal");
148 zebra_dplane_pre_finish();
150 for (ALL_LIST_ELEMENTS(zrouter
.client_list
, ln
, nn
, client
))
151 zserv_close_client(client
);
154 list_delete_all_node(zrouter
.client_list
);
159 RB_FOREACH (vrf
, vrf_name_head
, &vrfs_by_name
) {
162 SET_FLAG(zvrf
->flags
, ZEBRA_VRF_RETAIN
);
164 if (zrouter
.lsp_process_q
)
165 work_queue_free_and_null(&zrouter
.lsp_process_q
);
168 ns_walk_func(zebra_ns_early_shutdown
);
169 zebra_ns_notify_close();
175 list_delete(&zrouter
.client_list
);
177 /* Indicate that all new dplane work has been enqueued. When that
178 * work is complete, the dataplane will enqueue an event
179 * with the 'finalize' function.
181 zebra_dplane_finish();
185 * Final shutdown step for the zebra main thread. This is run after all
186 * async update processing has completed.
188 int zebra_finalize(struct thread
*dummy
)
190 zlog_info("Zebra final shutdown");
192 /* Final shutdown of ns resources */
193 ns_walk_func(zebra_ns_final_shutdown
);
195 /* Stop dplane thread and finish any cleanup */
196 zebra_dplane_shutdown();
198 zebra_router_terminate();
204 /* SIGUSR1 handler. */
205 static void sigusr1(void)
210 struct quagga_signal_t zebra_signals
[] = {
229 static const struct frr_yang_module_info
*zebra_yang_modules
[] = {
234 zebra
, ZEBRA
, .vty_port
= ZEBRA_VTY_PORT
, .flags
= FRR_NO_ZCLIENT
,
237 "Daemon which manages kernel routing table management "
238 "and\nredistribution between different routing protocols.",
240 .signals
= zebra_signals
, .n_signals
= array_size(zebra_signals
),
242 .privs
= &zserv_privs
,
244 .yang_modules
= zebra_yang_modules
,
245 .n_yang_modules
= array_size(zebra_yang_modules
), )
247 /* Main startup routine. */
248 int main(int argc
, char **argv
)
250 // int batch_mode = 0;
251 char *zserv_path
= NULL
;
252 char *vrf_default_name_configured
= NULL
;
253 struct sockaddr_storage dummy
;
255 #if defined(HANDLE_ZAPI_FUZZING)
256 char *zapi_fuzzing
= NULL
;
257 #endif /* HANDLE_ZAPI_FUZZING */
258 #if defined(HANDLE_NETLINK_FUZZING)
259 char *netlink_fuzzing
= NULL
;
260 #endif /* HANDLE_NETLINK_FUZZING */
262 graceful_restart
= 0;
263 vrf_configure_backend(VRF_BACKEND_VRF_LITE
);
265 frr_preinit(&zebra_di
, argc
, argv
);
272 #if defined(HANDLE_ZAPI_FUZZING)
274 #endif /* HANDLE_ZAPI_FUZZING */
275 #if defined(HANDLE_NETLINK_FUZZING)
277 #endif /* HANDLE_NETLINK_FUZZING */
280 " -b, --batch Runs in batch mode\n"
281 " -a, --allow_delete Allow other processes to delete zebra routes\n"
282 " -z, --socket Set path of zebra socket\n"
283 " -e, --ecmp Specify ECMP to use.\n"
284 " -r, --retain When program terminates, retain added route by zebra.\n"
285 " -o, --vrfdefaultname Set default VRF name.\n"
286 " -K, --graceful_restart Graceful restart at the kernel level, timer in seconds for expiration\n"
288 " -n, --vrfwnetns Use NetNS as VRF backend\n"
289 " -s, --nl-bufsize Set netlink receive buffer size\n"
290 " --v6-rr-semantics Use v6 RR semantics\n"
291 #endif /* HAVE_NETLINK */
292 #if defined(HANDLE_ZAPI_FUZZING)
293 " -c <file> Bypass normal startup and use this file for testing of zapi\n"
294 #endif /* HANDLE_ZAPI_FUZZING */
295 #if defined(HANDLE_NETLINK_FUZZING)
296 " -w <file> Bypass normal startup and use this file for testing of netlink input\n"
297 #endif /* HANDLE_NETLINK_FUZZING */
301 int opt
= frr_getopt(argc
, argv
, NULL
);
316 zrouter
.multipath_num
= atoi(optarg
);
317 if (zrouter
.multipath_num
> MULTIPATH_NUM
318 || zrouter
.multipath_num
<= 0) {
320 EC_ZEBRA_BAD_MULTIPATH_NUM
,
321 "Multipath Number specified must be less than %d and greater than 0",
327 vrf_default_name_configured
= optarg
;
331 if (!frr_zclient_addr(&dummy
, &dummylen
, optarg
)) {
333 "Invalid zserv socket path: %s\n",
342 graceful_restart
= atoi(optarg
);
346 nl_rcvbufsize
= atoi(optarg
);
349 vrf_configure_backend(VRF_BACKEND_NETNS
);
351 case OPTION_V6_RR_SEMANTICS
:
352 v6_rr_semantics
= true;
354 #endif /* HAVE_NETLINK */
355 #if defined(HANDLE_ZAPI_FUZZING)
357 zapi_fuzzing
= optarg
;
359 #endif /* HANDLE_ZAPI_FUZZING */
360 #if defined(HANDLE_NETLINK_FUZZING)
362 netlink_fuzzing
= optarg
;
363 /* This ensures we are aren't writing any of the
364 * startup netlink messages that happen when we
369 #endif /* HANDLE_NETLINK_FUZZING */
376 zrouter
.master
= frr_init();
378 /* Initialize pthread library */
381 /* Zebra related initialize. */
387 router_id_cmd_init();
390 * Initialize NS( and implicitly the VRF module), and make kernel
392 zebra_ns_init((const char *)vrf_default_name_configured
);
396 #if defined(HAVE_RTADV)
400 #ifdef ZEBRA_PTM_SUPPORT
405 zebra_mpls_vty_init();
409 /* For debug purpose. */
410 /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */
412 /* Process the configuration file. Among other configuration
413 * directives we can meet those installing static routes. Such
414 * requests will not be executed immediately, but queued in
415 * zebra->ribq structure until we enter the main execution loop.
416 * The notifications from kernel will show originating PID equal
417 * to that after daemon() completes (if ever called).
421 /* After we have successfully acquired the pidfile, we can be sure
422 * about being the only copy of zebra process, which is submitting
423 * changes to the FIB.
424 * Clean up zebra-originated routes. The requests will be sent to OS
425 * immediately, so originating PID in notifications from kernel
426 * will be equal to the current getpid(). To know about such routes,
427 * we have to have route_read() called before.
429 zrouter
.startup_time
= monotime(NULL
);
430 thread_add_timer(zrouter
.master
, rib_sweep_route
,
431 NULL
, graceful_restart
, NULL
);
433 /* Needed for BSD routing socket. */
436 /* Start dataplane system */
437 zebra_dplane_start();
439 /* Start Zebra API server */
440 zserv_start(zserv_path
);
442 /* Init label manager */
443 label_manager_init();
448 /* Config handler Init */
454 #if defined(HANDLE_ZAPI_FUZZING)
456 zserv_read_file(zapi_fuzzing
);
459 #endif /* HANDLE_ZAPI_FUZZING */
460 #if defined(HANDLE_NETLINK_FUZZING)
461 if (netlink_fuzzing
) {
462 netlink_read_init(netlink_fuzzing
);
465 #endif /* HANDLE_NETLINK_FUZZING */
468 frr_run(zrouter
.master
);