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"
37 #include "logicalrouter.h"
40 #include "frr_pthread.h"
42 #include "zebra/zebra_router.h"
43 #include "zebra/zebra_errors.h"
44 #include "zebra/rib.h"
45 #include "zebra/zserv.h"
46 #include "zebra/debug.h"
47 #include "zebra/router-id.h"
48 #include "zebra/irdp.h"
49 #include "zebra/rtadv.h"
50 #include "zebra/zebra_ptm.h"
51 #include "zebra/zebra_ns.h"
52 #include "zebra/redistribute.h"
53 #include "zebra/zebra_mpls.h"
54 #include "zebra/label_manager.h"
55 #include "zebra/zebra_netns_notify.h"
56 #include "zebra/zebra_rnh.h"
57 #include "zebra/zebra_pbr.h"
59 #if defined(HANDLE_NETLINK_FUZZING)
60 #include "zebra/kernel_netlink.h"
61 #endif /* HANDLE_NETLINK_FUZZING */
63 #define ZEBRA_PTM_SUPPORT
66 struct zebra_t zebrad
= {
67 .rtm_table_default
= 0,
68 .packets_to_process
= ZEBRA_ZAPI_PACKETS_TO_PROCESS
,
74 /* Pacify zclient.o in libfrr, which expects this variable. */
75 struct thread_master
*master
;
77 /* Route retain mode flag. */
80 /* Allow non-quagga entities to delete quagga routes */
83 /* Don't delete kernel route. */
84 int keep_kernel_mode
= 0;
86 bool v6_rr_semantics
= false;
89 /* Receive buffer size for netlink socket */
90 uint32_t nl_rcvbufsize
= 4194304;
91 #endif /* HAVE_NETLINK */
93 #define OPTION_V6_RR_SEMANTICS 2000
94 /* Command line options. */
95 struct option longopts
[] = {
96 {"batch", no_argument
, NULL
, 'b'},
97 {"allow_delete", no_argument
, NULL
, 'a'},
98 {"keep_kernel", no_argument
, NULL
, 'k'},
99 {"socket", required_argument
, NULL
, 'z'},
100 {"ecmp", required_argument
, NULL
, 'e'},
101 {"label_socket", no_argument
, NULL
, 'l'},
102 {"retain", no_argument
, NULL
, 'r'},
103 {"vrfdefaultname", required_argument
, NULL
, 'o'},
105 {"vrfwnetns", no_argument
, NULL
, 'n'},
106 {"nl-bufsize", required_argument
, NULL
, 's'},
107 {"v6-rr-semantics", no_argument
, NULL
, OPTION_V6_RR_SEMANTICS
},
108 #endif /* HAVE_NETLINK */
111 zebra_capabilities_t _caps_p
[] = {
112 ZCAP_NET_ADMIN
, ZCAP_SYS_ADMIN
, ZCAP_NET_RAW
,
115 /* zebra privileges to run with */
116 struct zebra_privs_t zserv_privs
= {
117 #if defined(FRR_USER) && defined(FRR_GROUP)
122 .vty_group
= VTY_GROUP
,
125 .cap_num_p
= array_size(_caps_p
),
128 unsigned int multipath_num
= MULTIPATH_NUM
;
130 /* SIGHUP handler. */
131 static void sighup(void)
133 zlog_info("SIGHUP received");
135 /* Reload of config file. */
139 /* SIGINT handler. */
140 static void sigint(void)
143 struct zebra_vrf
*zvrf
;
144 struct listnode
*ln
, *nn
;
145 struct zserv
*client
;
146 static bool sigint_done
;
153 zlog_notice("Terminating on signal");
157 zebra_dplane_pre_finish();
159 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, ln
, nn
, client
))
160 zserv_close_client(client
);
162 list_delete_all_node(zebrad
.client_list
);
166 RB_FOREACH (vrf
, vrf_name_head
, &vrfs_by_name
) {
169 SET_FLAG(zvrf
->flags
, ZEBRA_VRF_RETAIN
);
171 if (zebrad
.lsp_process_q
)
172 work_queue_free_and_null(&zebrad
.lsp_process_q
);
175 ns_walk_func(zebra_ns_early_shutdown
);
176 zebra_ns_notify_close();
182 list_delete(&zebrad
.client_list
);
184 /* Indicate that all new dplane work has been enqueued. When that
185 * work is complete, the dataplane will enqueue an event
186 * with the 'finalize' function.
188 zebra_dplane_finish();
192 * Final shutdown step for the zebra main thread. This is run after all
193 * async update processing has completed.
195 int zebra_finalize(struct thread
*dummy
)
197 zlog_info("Zebra final shutdown");
199 /* Final shutdown of ns resources */
200 ns_walk_func(zebra_ns_final_shutdown
);
202 /* Stop dplane thread and finish any cleanup */
203 zebra_dplane_shutdown();
205 work_queue_free_and_null(&zebrad
.ribq
);
206 meta_queue_free(zebrad
.mq
);
208 zebra_router_terminate();
214 /* SIGUSR1 handler. */
215 static void sigusr1(void)
220 struct quagga_signal_t zebra_signals
[] = {
239 static const struct frr_yang_module_info
*zebra_yang_modules
[] = {
244 zebra
, ZEBRA
, .vty_port
= ZEBRA_VTY_PORT
, .flags
= FRR_NO_ZCLIENT
,
247 "Daemon which manages kernel routing table management "
248 "and\nredistribution between different routing protocols.",
250 .signals
= zebra_signals
, .n_signals
= array_size(zebra_signals
),
252 .privs
= &zserv_privs
,
254 .yang_modules
= zebra_yang_modules
,
255 .n_yang_modules
= array_size(zebra_yang_modules
), )
257 /* Main startup routine. */
258 int main(int argc
, char **argv
)
260 // int batch_mode = 0;
261 char *zserv_path
= NULL
;
262 char *vrf_default_name_configured
= NULL
;
263 /* Socket to external label manager */
264 char *lblmgr_path
= NULL
;
265 struct sockaddr_storage dummy
;
267 #if defined(HANDLE_ZAPI_FUZZING)
268 char *zapi_fuzzing
= NULL
;
269 #endif /* HANDLE_ZAPI_FUZZING */
270 #if defined(HANDLE_NETLINK_FUZZING)
271 char *netlink_fuzzing
= NULL
;
272 #endif /* HANDLE_NETLINK_FUZZING */
274 vrf_configure_backend(VRF_BACKEND_VRF_LITE
);
275 logicalrouter_configure_backend(LOGICALROUTER_BACKEND_NETNS
);
277 frr_preinit(&zebra_di
, argc
, argv
);
284 #if defined(HANDLE_ZAPI_FUZZING)
286 #endif /* HANDLE_ZAPI_FUZZING */
287 #if defined(HANDLE_NETLINK_FUZZING)
289 #endif /* HANDLE_NETLINK_FUZZING */
292 " -b, --batch Runs in batch mode\n"
293 " -a, --allow_delete Allow other processes to delete zebra routes\n"
294 " -z, --socket Set path of zebra socket\n"
295 " -e, --ecmp Specify ECMP to use.\n"
296 " -l, --label_socket Socket to external label manager\n"
297 " -k, --keep_kernel Don't delete old routes which were installed by zebra.\n"
298 " -r, --retain When program terminates, retain added route by zebra.\n"
299 " -o, --vrfdefaultname Set default VRF name.\n"
301 " -n, --vrfwnetns Use NetNS as VRF backend\n"
302 " -s, --nl-bufsize Set netlink receive buffer size\n"
303 " --v6-rr-semantics Use v6 RR semantics\n"
304 #endif /* HAVE_NETLINK */
305 #if defined(HANDLE_ZAPI_FUZZING)
306 " -c <file> Bypass normal startup and use this file for testing of zapi\n"
307 #endif /* HANDLE_ZAPI_FUZZING */
308 #if defined(HANDLE_NETLINK_FUZZING)
309 " -w <file> Bypass normal startup and use this file for testing of netlink input\n"
310 #endif /* HANDLE_NETLINK_FUZZING */
314 int opt
= frr_getopt(argc
, argv
, NULL
);
329 keep_kernel_mode
= 1;
332 multipath_num
= atoi(optarg
);
333 if (multipath_num
> MULTIPATH_NUM
334 || multipath_num
<= 0) {
336 EC_ZEBRA_BAD_MULTIPATH_NUM
,
337 "Multipath Number specified must be less than %d and greater than 0",
343 vrf_default_name_configured
= optarg
;
347 if (!frr_zclient_addr(&dummy
, &dummylen
, optarg
)) {
349 "Invalid zserv socket path: %s\n",
355 lblmgr_path
= optarg
;
362 nl_rcvbufsize
= atoi(optarg
);
365 vrf_configure_backend(VRF_BACKEND_NETNS
);
366 logicalrouter_configure_backend(
367 LOGICALROUTER_BACKEND_OFF
);
369 case OPTION_V6_RR_SEMANTICS
:
370 v6_rr_semantics
= true;
372 #endif /* HAVE_NETLINK */
373 #if defined(HANDLE_ZAPI_FUZZING)
375 zapi_fuzzing
= optarg
;
377 #endif /* HANDLE_ZAPI_FUZZING */
378 #if defined(HANDLE_NETLINK_FUZZING)
380 netlink_fuzzing
= optarg
;
381 /* This ensures we are aren't writing any of the
382 * startup netlink messages that happen when we
387 #endif /* HANDLE_NETLINK_FUZZING */
394 zebrad
.master
= frr_init();
396 /* Initialize pthread library */
399 /* Zebra related initialize. */
405 router_id_cmd_init();
408 * Initialize NS( and implicitly the VRF module), and make kernel
411 if (vrf_default_name_configured
)
412 vrf_set_default_name(vrf_default_name_configured
,
417 #if defined(HAVE_RTADV)
421 #ifdef ZEBRA_PTM_SUPPORT
426 zebra_mpls_vty_init();
430 /* For debug purpose. */
431 /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */
433 /* Process the configuration file. Among other configuration
434 * directives we can meet those installing static routes. Such
435 * requests will not be executed immediately, but queued in
436 * zebra->ribq structure until we enter the main execution loop.
437 * The notifications from kernel will show originating PID equal
438 * to that after daemon() completes (if ever called).
442 /* After we have successfully acquired the pidfile, we can be sure
443 * about being the only copy of zebra process, which is submitting
444 * changes to the FIB.
445 * Clean up zebra-originated routes. The requests will be sent to OS
446 * immediately, so originating PID in notifications from kernel
447 * will be equal to the current getpid(). To know about such routes,
448 * we have to have route_read() called before.
450 if (!keep_kernel_mode
)
453 /* Needed for BSD routing socket. */
456 /* Start dataplane system */
457 zebra_dplane_start();
459 /* Start Zebra API server */
460 zserv_start(zserv_path
);
462 /* Init label manager */
463 label_manager_init(lblmgr_path
);
471 #if defined(HANDLE_ZAPI_FUZZING)
473 zserv_read_file(zapi_fuzzing
);
476 #endif /* HANDLE_ZAPI_FUZZING */
477 #if defined(HANDLE_NETLINK_FUZZING)
478 if (netlink_fuzzing
) {
479 netlink_read_init(netlink_fuzzing
);
482 #endif /* HANDLE_NETLINK_FUZZING */
485 frr_run(zebrad
.master
);