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edd7c245 | 1 | /* zebra daemon main routine. |
718e3744 | 2 | * Copyright (C) 1997, 98 Kunihiro Ishiguro |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
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 | |
9 | * later version. | |
10 | * | |
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. | |
15 | * | |
896014f4 DL |
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 | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
5e4fa164 | 23 | #include <lib/version.h> |
718e3744 | 24 | #include "getopt.h" |
25 | #include "command.h" | |
26 | #include "thread.h" | |
27 | #include "filter.h" | |
28 | #include "memory.h" | |
4a1ab8e4 | 29 | #include "zebra_memory.h" |
718e3744 | 30 | #include "prefix.h" |
31 | #include "log.h" | |
7514fb77 | 32 | #include "plist.h" |
edd7c245 | 33 | #include "privs.h" |
2d75d052 | 34 | #include "sigevent.h" |
b72ede27 | 35 | #include "vrf.h" |
4f04a76b | 36 | #include "libfrr.h" |
bf094f69 | 37 | #include "routemap.h" |
718e3744 | 38 | |
89272910 | 39 | #include "zebra/zebra_router.h" |
43e52561 | 40 | #include "zebra/zebra_errors.h" |
718e3744 | 41 | #include "zebra/rib.h" |
42 | #include "zebra/zserv.h" | |
43 | #include "zebra/debug.h" | |
18a6dce6 | 44 | #include "zebra/router-id.h" |
ca776988 | 45 | #include "zebra/irdp.h" |
a1ac18c4 | 46 | #include "zebra/rtadv.h" |
244c1cdc | 47 | #include "zebra/zebra_ptm.h" |
fe18ee2d | 48 | #include "zebra/zebra_ns.h" |
e2b1be64 | 49 | #include "zebra/redistribute.h" |
7758e3f3 | 50 | #include "zebra/zebra_mpls.h" |
fea12efb | 51 | #include "zebra/label_manager.h" |
e27dec3c | 52 | #include "zebra/zebra_netns_notify.h" |
453844ab | 53 | #include "zebra/zebra_rnh.h" |
4c0ec639 | 54 | #include "zebra/zebra_pbr.h" |
27627f9a | 55 | #include "zebra/zebra_vxlan.h" |
244c1cdc | 56 | |
acfa8927 | 57 | #if defined(HANDLE_NETLINK_FUZZING) |
81a2f870 | 58 | #include "zebra/kernel_netlink.h" |
acfa8927 | 59 | #endif /* HANDLE_NETLINK_FUZZING */ |
81a2f870 | 60 | |
244c1cdc | 61 | #define ZEBRA_PTM_SUPPORT |
718e3744 | 62 | |
718e3744 | 63 | /* process id. */ |
718e3744 | 64 | pid_t pid; |
65 | ||
55c72803 | 66 | /* Pacify zclient.o in libfrr, which expects this variable. */ |
87efd646 | 67 | struct thread_master *master; |
68 | ||
718e3744 | 69 | /* Route retain mode flag. */ |
70 | int retain_mode = 0; | |
71 | ||
6baf7bb8 DS |
72 | /* Allow non-quagga entities to delete quagga routes */ |
73 | int allow_delete = 0; | |
74 | ||
d4644d41 DS |
75 | int graceful_restart; |
76 | ||
6b093863 DS |
77 | bool v6_rr_semantics = false; |
78 | ||
c34b6b57 | 79 | #ifdef HAVE_NETLINK |
80 | /* Receive buffer size for netlink socket */ | |
d7c0a89a | 81 | uint32_t nl_rcvbufsize = 4194304; |
c34b6b57 | 82 | #endif /* HAVE_NETLINK */ |
83 | ||
6b093863 | 84 | #define OPTION_V6_RR_SEMANTICS 2000 |
718e3744 | 85 | /* Command line options. */ |
2b64873d | 86 | const struct option longopts[] = { |
6b093863 DS |
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'}, | |
6b093863 | 92 | {"retain", no_argument, NULL, 'r'}, |
cc6743c2 | 93 | {"vrfdefaultname", required_argument, NULL, 'o'}, |
d4644d41 | 94 | {"graceful_restart", required_argument, NULL, 'K'}, |
c34b6b57 | 95 | #ifdef HAVE_NETLINK |
6b093863 DS |
96 | {"vrfwnetns", no_argument, NULL, 'n'}, |
97 | {"nl-bufsize", required_argument, NULL, 's'}, | |
98 | {"v6-rr-semantics", no_argument, NULL, OPTION_V6_RR_SEMANTICS}, | |
c34b6b57 | 99 | #endif /* HAVE_NETLINK */ |
6b093863 | 100 | {0}}; |
718e3744 | 101 | |
d62a17ae | 102 | zebra_capabilities_t _caps_p[] = { |
9d303b37 | 103 | ZCAP_NET_ADMIN, ZCAP_SYS_ADMIN, ZCAP_NET_RAW, |
edd7c245 | 104 | }; |
105 | ||
106 | /* zebra privileges to run with */ | |
d62a17ae | 107 | struct zebra_privs_t zserv_privs = { |
b2f36157 | 108 | #if defined(FRR_USER) && defined(FRR_GROUP) |
d62a17ae | 109 | .user = FRR_USER, |
110 | .group = FRR_GROUP, | |
edd7c245 | 111 | #endif |
112 | #ifdef VTY_GROUP | |
d62a17ae | 113 | .vty_group = VTY_GROUP, |
edd7c245 | 114 | #endif |
d62a17ae | 115 | .caps_p = _caps_p, |
116 | .cap_num_p = array_size(_caps_p), | |
117 | .cap_num_i = 0}; | |
edd7c245 | 118 | |
718e3744 | 119 | /* SIGHUP handler. */ |
d62a17ae | 120 | static void sighup(void) |
718e3744 | 121 | { |
d62a17ae | 122 | zlog_info("SIGHUP received"); |
718e3744 | 123 | |
d62a17ae | 124 | /* Reload of config file. */ |
125 | ; | |
718e3744 | 126 | } |
127 | ||
128 | /* SIGINT handler. */ | |
d62a17ae | 129 | static void sigint(void) |
718e3744 | 130 | { |
d62a17ae | 131 | struct vrf *vrf; |
132 | struct zebra_vrf *zvrf; | |
f3e33b69 QY |
133 | struct listnode *ln, *nn; |
134 | struct zserv *client; | |
ff2460d5 MS |
135 | static bool sigint_done; |
136 | ||
137 | if (sigint_done) | |
138 | return; | |
139 | ||
140 | sigint_done = true; | |
fe18ee2d | 141 | |
d62a17ae | 142 | zlog_notice("Terminating on signal"); |
718e3744 | 143 | |
2fc69f03 MS |
144 | atomic_store_explicit(&zrouter.in_shutdown, true, |
145 | memory_order_relaxed); | |
146 | ||
d7fc0e67 DS |
147 | /* send RA lifetime of 0 before stopping. rfc4861/6.2.5 */ |
148 | rtadv_stop_ra_all(); | |
149 | ||
03951374 | 150 | frr_early_fini(); |
718e3744 | 151 | |
4dfd7a02 MS |
152 | zebra_dplane_pre_finish(); |
153 | ||
b9e6727a S |
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); | |
157 | ||
161e9ab7 | 158 | for (ALL_LIST_ELEMENTS(zrouter.client_list, ln, nn, client)) |
f3e33b69 QY |
159 | zserv_close_client(client); |
160 | ||
41674562 | 161 | zserv_close(); |
161e9ab7 | 162 | list_delete_all_node(zrouter.client_list); |
41674562 | 163 | |
f88bd20c | 164 | zebra_ptm_finish(); |
d62a17ae | 165 | |
166 | if (retain_mode) | |
a2addae8 | 167 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
d62a17ae | 168 | zvrf = vrf->info; |
169 | if (zvrf) | |
170 | SET_FLAG(zvrf->flags, ZEBRA_VRF_RETAIN); | |
171 | } | |
e2353ec2 DS |
172 | if (zrouter.lsp_process_q) |
173 | work_queue_free_and_null(&zrouter.lsp_process_q); | |
3e0372d2 | 174 | |
d62a17ae | 175 | vrf_terminate(); |
176 | ||
62b8bb7a | 177 | ns_walk_func(zebra_ns_early_shutdown); |
e27dec3c | 178 | zebra_ns_notify_close(); |
d62a17ae | 179 | |
180 | access_list_reset(); | |
181 | prefix_list_reset(); | |
182 | route_map_finish(); | |
03951374 | 183 | |
161e9ab7 | 184 | list_delete(&zrouter.client_list); |
4dfd7a02 | 185 | |
ff2460d5 MS |
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. | |
189 | */ | |
1d11b21f | 190 | zebra_dplane_finish(); |
4dfd7a02 MS |
191 | } |
192 | ||
ff2460d5 MS |
193 | /* |
194 | * Final shutdown step for the zebra main thread. This is run after all | |
195 | * async update processing has completed. | |
196 | */ | |
4dfd7a02 MS |
197 | int zebra_finalize(struct thread *dummy) |
198 | { | |
199 | zlog_info("Zebra final shutdown"); | |
200 | ||
62b8bb7a MS |
201 | /* Final shutdown of ns resources */ |
202 | ns_walk_func(zebra_ns_final_shutdown); | |
203 | ||
4dfd7a02 MS |
204 | /* Stop dplane thread and finish any cleanup */ |
205 | zebra_dplane_shutdown(); | |
1d11b21f | 206 | |
89272910 DS |
207 | zebra_router_terminate(); |
208 | ||
03951374 | 209 | frr_fini(); |
d62a17ae | 210 | exit(0); |
718e3744 | 211 | } |
212 | ||
213 | /* SIGUSR1 handler. */ | |
d62a17ae | 214 | static void sigusr1(void) |
718e3744 | 215 | { |
d62a17ae | 216 | zlog_rotate(); |
718e3744 | 217 | } |
218 | ||
d62a17ae | 219 | struct quagga_signal_t zebra_signals[] = { |
220 | { | |
221 | .signal = SIGHUP, | |
222 | .handler = &sighup, | |
223 | }, | |
224 | { | |
225 | .signal = SIGUSR1, | |
226 | .handler = &sigusr1, | |
227 | }, | |
228 | { | |
229 | .signal = SIGINT, | |
230 | .handler = &sigint, | |
231 | }, | |
232 | { | |
233 | .signal = SIGTERM, | |
234 | .handler = &sigint, | |
235 | }, | |
2d75d052 | 236 | }; |
b72ede27 | 237 | |
0d8c7a26 | 238 | static const struct frr_yang_module_info *const zebra_yang_modules[] = { |
a4bed468 | 239 | &frr_interface_info, |
91835f1f | 240 | &frr_route_map_info, |
8fcdd0d6 RW |
241 | }; |
242 | ||
d62a17ae | 243 | FRR_DAEMON_INFO( |
244 | zebra, ZEBRA, .vty_port = ZEBRA_VTY_PORT, .flags = FRR_NO_ZCLIENT, | |
4f04a76b | 245 | |
d62a17ae | 246 | .proghelp = |
247 | "Daemon which manages kernel routing table management " | |
4f04a76b DL |
248 | "and\nredistribution between different routing protocols.", |
249 | ||
d62a17ae | 250 | .signals = zebra_signals, .n_signals = array_size(zebra_signals), |
4f04a76b | 251 | |
8fcdd0d6 RW |
252 | .privs = &zserv_privs, |
253 | ||
254 | .yang_modules = zebra_yang_modules, | |
255 | .n_yang_modules = array_size(zebra_yang_modules), ) | |
4f04a76b | 256 | |
718e3744 | 257 | /* Main startup routine. */ |
d62a17ae | 258 | int main(int argc, char **argv) |
718e3744 | 259 | { |
d62a17ae | 260 | // int batch_mode = 0; |
261 | char *zserv_path = NULL; | |
53af0706 | 262 | char *vrf_default_name_configured = NULL; |
689f5a8c DL |
263 | struct sockaddr_storage dummy; |
264 | socklen_t dummylen; | |
411314ed | 265 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 | 266 | char *zapi_fuzzing = NULL; |
acfa8927 SW |
267 | #endif /* HANDLE_ZAPI_FUZZING */ |
268 | #if defined(HANDLE_NETLINK_FUZZING) | |
81a2f870 | 269 | char *netlink_fuzzing = NULL; |
acfa8927 | 270 | #endif /* HANDLE_NETLINK_FUZZING */ |
fea12efb | 271 | |
d4644d41 | 272 | graceful_restart = 0; |
78dd30b2 PG |
273 | vrf_configure_backend(VRF_BACKEND_VRF_LITE); |
274 | ||
d62a17ae | 275 | frr_preinit(&zebra_di, argc, argv); |
718e3744 | 276 | |
d62a17ae | 277 | frr_opt_add( |
e11d7c96 | 278 | "baz:e:o:rK:" |
4f04a76b | 279 | #ifdef HAVE_NETLINK |
78dd30b2 | 280 | "s:n" |
411314ed DS |
281 | #endif |
282 | #if defined(HANDLE_ZAPI_FUZZING) | |
acfa8927 SW |
283 | "c:" |
284 | #endif /* HANDLE_ZAPI_FUZZING */ | |
285 | #if defined(HANDLE_NETLINK_FUZZING) | |
286 | "w:" | |
287 | #endif /* HANDLE_NETLINK_FUZZING */ | |
d62a17ae | 288 | , |
289 | longopts, | |
d4644d41 DS |
290 | " -b, --batch Runs in batch mode\n" |
291 | " -a, --allow_delete Allow other processes to delete zebra routes\n" | |
292 | " -z, --socket Set path of zebra socket\n" | |
293 | " -e, --ecmp Specify ECMP to use.\n" | |
d4644d41 DS |
294 | " -r, --retain When program terminates, retain added route by zebra.\n" |
295 | " -o, --vrfdefaultname Set default VRF name.\n" | |
296 | " -K, --graceful_restart Graceful restart at the kernel level, timer in seconds for expiration\n" | |
4f04a76b | 297 | #ifdef HAVE_NETLINK |
d4644d41 DS |
298 | " -n, --vrfwnetns Use NetNS as VRF backend\n" |
299 | " -s, --nl-bufsize Set netlink receive buffer size\n" | |
300 | " --v6-rr-semantics Use v6 RR semantics\n" | |
4f04a76b | 301 | #endif /* HAVE_NETLINK */ |
411314ed | 302 | #if defined(HANDLE_ZAPI_FUZZING) |
d4644d41 | 303 | " -c <file> Bypass normal startup and use this file for testing of zapi\n" |
acfa8927 SW |
304 | #endif /* HANDLE_ZAPI_FUZZING */ |
305 | #if defined(HANDLE_NETLINK_FUZZING) | |
d4644d41 | 306 | " -w <file> Bypass normal startup and use this file for testing of netlink input\n" |
acfa8927 | 307 | #endif /* HANDLE_NETLINK_FUZZING */ |
6b093863 | 308 | ); |
d62a17ae | 309 | |
310 | while (1) { | |
311 | int opt = frr_getopt(argc, argv, NULL); | |
312 | ||
313 | if (opt == EOF) | |
314 | break; | |
315 | ||
316 | switch (opt) { | |
317 | case 0: | |
318 | break; | |
319 | case 'b': | |
320 | // batch_mode = 1; | |
321 | break; | |
322 | case 'a': | |
323 | allow_delete = 1; | |
324 | break; | |
d62a17ae | 325 | case 'e': |
b3f2b590 DS |
326 | zrouter.multipath_num = atoi(optarg); |
327 | if (zrouter.multipath_num > MULTIPATH_NUM | |
328 | || zrouter.multipath_num <= 0) { | |
af4c2728 | 329 | flog_err( |
e914ccbe | 330 | EC_ZEBRA_BAD_MULTIPATH_NUM, |
d62a17ae | 331 | "Multipath Number specified must be less than %d and greater than 0", |
332 | MULTIPATH_NUM); | |
333 | return 1; | |
334 | } | |
335 | break; | |
cc6743c2 | 336 | case 'o': |
53af0706 | 337 | vrf_default_name_configured = optarg; |
cc6743c2 | 338 | break; |
d62a17ae | 339 | case 'z': |
340 | zserv_path = optarg; | |
689f5a8c DL |
341 | if (!frr_zclient_addr(&dummy, &dummylen, optarg)) { |
342 | fprintf(stderr, | |
343 | "Invalid zserv socket path: %s\n", | |
344 | optarg); | |
345 | exit(1); | |
346 | } | |
d62a17ae | 347 | break; |
d62a17ae | 348 | case 'r': |
349 | retain_mode = 1; | |
350 | break; | |
d4644d41 | 351 | case 'K': |
d4644d41 DS |
352 | graceful_restart = atoi(optarg); |
353 | break; | |
c34b6b57 | 354 | #ifdef HAVE_NETLINK |
d62a17ae | 355 | case 's': |
356 | nl_rcvbufsize = atoi(optarg); | |
357 | break; | |
78dd30b2 PG |
358 | case 'n': |
359 | vrf_configure_backend(VRF_BACKEND_NETNS); | |
360 | break; | |
6b093863 DS |
361 | case OPTION_V6_RR_SEMANTICS: |
362 | v6_rr_semantics = true; | |
363 | break; | |
c34b6b57 | 364 | #endif /* HAVE_NETLINK */ |
411314ed DS |
365 | #if defined(HANDLE_ZAPI_FUZZING) |
366 | case 'c': | |
81a2f870 | 367 | zapi_fuzzing = optarg; |
81a2f870 | 368 | break; |
acfa8927 SW |
369 | #endif /* HANDLE_ZAPI_FUZZING */ |
370 | #if defined(HANDLE_NETLINK_FUZZING) | |
81a2f870 SW |
371 | case 'w': |
372 | netlink_fuzzing = optarg; | |
373 | /* This ensures we are aren't writing any of the | |
374 | * startup netlink messages that happen when we | |
375 | * just want to read. | |
376 | */ | |
acfa8927 | 377 | netlink_read = true; |
411314ed | 378 | break; |
acfa8927 | 379 | #endif /* HANDLE_NETLINK_FUZZING */ |
d62a17ae | 380 | default: |
381 | frr_help_exit(1); | |
382 | break; | |
383 | } | |
718e3744 | 384 | } |
d62a17ae | 385 | |
3801e764 | 386 | zrouter.master = frr_init(); |
d62a17ae | 387 | |
388 | /* Zebra related initialize. */ | |
89272910 | 389 | zebra_router_init(); |
5f145fb8 | 390 | zserv_init(); |
d62a17ae | 391 | rib_init(); |
392 | zebra_if_init(); | |
393 | zebra_debug_init(); | |
394 | router_id_cmd_init(); | |
f84fc2c9 DS |
395 | |
396 | /* | |
397 | * Initialize NS( and implicitly the VRF module), and make kernel | |
398 | * routing socket. */ | |
edbc3322 | 399 | zebra_ns_init((const char *)vrf_default_name_configured); |
f84fc2c9 | 400 | zebra_vty_init(); |
d62a17ae | 401 | access_list_init(); |
402 | prefix_list_init(); | |
403 | #if defined(HAVE_RTADV) | |
404 | rtadv_cmd_init(); | |
36735ed9 | 405 | #endif |
d62a17ae | 406 | /* PTM socket */ |
244c1cdc | 407 | #ifdef ZEBRA_PTM_SUPPORT |
d62a17ae | 408 | zebra_ptm_init(); |
244c1cdc | 409 | #endif |
718e3744 | 410 | |
d62a17ae | 411 | zebra_mpls_init(); |
412 | zebra_mpls_vty_init(); | |
2dd0d726 | 413 | zebra_pw_vty_init(); |
4c0ec639 | 414 | zebra_pbr_init(); |
7758e3f3 | 415 | |
996c9314 LB |
416 | /* For debug purpose. */ |
417 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
718e3744 | 418 | |
d62a17ae | 419 | /* Process the configuration file. Among other configuration |
9d303b37 DL |
420 | * directives we can meet those installing static routes. Such |
421 | * requests will not be executed immediately, but queued in | |
422 | * zebra->ribq structure until we enter the main execution loop. | |
423 | * The notifications from kernel will show originating PID equal | |
424 | * to that after daemon() completes (if ever called). | |
425 | */ | |
d62a17ae | 426 | frr_config_fork(); |
718e3744 | 427 | |
d62a17ae | 428 | /* After we have successfully acquired the pidfile, we can be sure |
9d303b37 DL |
429 | * about being the only copy of zebra process, which is submitting |
430 | * changes to the FIB. | |
431 | * Clean up zebra-originated routes. The requests will be sent to OS | |
432 | * immediately, so originating PID in notifications from kernel | |
433 | * will be equal to the current getpid(). To know about such routes, | |
434 | * we have to have route_read() called before. | |
435 | */ | |
d4644d41 | 436 | zrouter.startup_time = monotime(NULL); |
33656d2d DS |
437 | thread_add_timer(zrouter.master, rib_sweep_route, |
438 | NULL, graceful_restart, NULL); | |
91b7351d | 439 | |
d62a17ae | 440 | /* Needed for BSD routing socket. */ |
441 | pid = getpid(); | |
718e3744 | 442 | |
e5a60d82 MS |
443 | /* Start dataplane system */ |
444 | zebra_dplane_start(); | |
445 | ||
21ccc0cf QY |
446 | /* Start Zebra API server */ |
447 | zserv_start(zserv_path); | |
97be79f9 | 448 | |
d62a17ae | 449 | /* Init label manager */ |
e11d7c96 | 450 | label_manager_init(); |
fea12efb | 451 | |
453844ab QY |
452 | /* RNH init */ |
453 | zebra_rnh_init(); | |
89272910 | 454 | |
27627f9a KA |
455 | /* Config handler Init */ |
456 | zebra_evpn_init(); | |
457 | ||
5ad4c39c QY |
458 | /* Error init */ |
459 | zebra_error_init(); | |
453844ab | 460 | |
2875801f | 461 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 SW |
462 | if (zapi_fuzzing) { |
463 | zserv_read_file(zapi_fuzzing); | |
464 | exit(0); | |
acfa8927 SW |
465 | } |
466 | #endif /* HANDLE_ZAPI_FUZZING */ | |
467 | #if defined(HANDLE_NETLINK_FUZZING) | |
468 | if (netlink_fuzzing) { | |
81a2f870 | 469 | netlink_read_init(netlink_fuzzing); |
2875801f QY |
470 | exit(0); |
471 | } | |
acfa8927 | 472 | #endif /* HANDLE_NETLINK_FUZZING */ |
2875801f QY |
473 | |
474 | ||
3801e764 | 475 | frr_run(zrouter.master); |
718e3744 | 476 | |
d62a17ae | 477 | /* Not reached... */ |
478 | return 0; | |
718e3744 | 479 | } |