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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" |
fc7948fa | 30 | #include "memory_vty.h" |
718e3744 | 31 | #include "prefix.h" |
32 | #include "log.h" | |
7514fb77 | 33 | #include "plist.h" |
edd7c245 | 34 | #include "privs.h" |
2d75d052 | 35 | #include "sigevent.h" |
b72ede27 | 36 | #include "vrf.h" |
736d41ad | 37 | #include "logicalrouter.h" |
4f04a76b | 38 | #include "libfrr.h" |
bf094f69 | 39 | #include "routemap.h" |
329e35da | 40 | #include "frr_pthread.h" |
718e3744 | 41 | |
89272910 | 42 | #include "zebra/zebra_router.h" |
43e52561 | 43 | #include "zebra/zebra_errors.h" |
718e3744 | 44 | #include "zebra/rib.h" |
45 | #include "zebra/zserv.h" | |
46 | #include "zebra/debug.h" | |
18a6dce6 | 47 | #include "zebra/router-id.h" |
ca776988 | 48 | #include "zebra/irdp.h" |
a1ac18c4 | 49 | #include "zebra/rtadv.h" |
244c1cdc | 50 | #include "zebra/zebra_ptm.h" |
fe18ee2d | 51 | #include "zebra/zebra_ns.h" |
e2b1be64 | 52 | #include "zebra/redistribute.h" |
7758e3f3 | 53 | #include "zebra/zebra_mpls.h" |
fea12efb | 54 | #include "zebra/label_manager.h" |
e27dec3c | 55 | #include "zebra/zebra_netns_notify.h" |
453844ab | 56 | #include "zebra/zebra_rnh.h" |
4c0ec639 | 57 | #include "zebra/zebra_pbr.h" |
27627f9a | 58 | #include "zebra/zebra_vxlan.h" |
244c1cdc | 59 | |
acfa8927 | 60 | #if defined(HANDLE_NETLINK_FUZZING) |
81a2f870 | 61 | #include "zebra/kernel_netlink.h" |
acfa8927 | 62 | #endif /* HANDLE_NETLINK_FUZZING */ |
81a2f870 | 63 | |
244c1cdc | 64 | #define ZEBRA_PTM_SUPPORT |
718e3744 | 65 | |
718e3744 | 66 | /* process id. */ |
718e3744 | 67 | pid_t pid; |
68 | ||
55c72803 | 69 | /* Pacify zclient.o in libfrr, which expects this variable. */ |
87efd646 | 70 | struct thread_master *master; |
71 | ||
718e3744 | 72 | /* Route retain mode flag. */ |
73 | int retain_mode = 0; | |
74 | ||
6baf7bb8 DS |
75 | /* Allow non-quagga entities to delete quagga routes */ |
76 | int allow_delete = 0; | |
77 | ||
d4644d41 DS |
78 | int graceful_restart; |
79 | ||
6b093863 DS |
80 | bool v6_rr_semantics = false; |
81 | ||
c34b6b57 | 82 | #ifdef HAVE_NETLINK |
83 | /* Receive buffer size for netlink socket */ | |
d7c0a89a | 84 | uint32_t nl_rcvbufsize = 4194304; |
c34b6b57 | 85 | #endif /* HAVE_NETLINK */ |
86 | ||
6b093863 | 87 | #define OPTION_V6_RR_SEMANTICS 2000 |
718e3744 | 88 | /* Command line options. */ |
6b093863 DS |
89 | struct option longopts[] = { |
90 | {"batch", no_argument, NULL, 'b'}, | |
91 | {"allow_delete", no_argument, NULL, 'a'}, | |
92 | {"keep_kernel", no_argument, NULL, 'k'}, | |
93 | {"socket", required_argument, NULL, 'z'}, | |
94 | {"ecmp", required_argument, NULL, 'e'}, | |
95 | {"label_socket", no_argument, NULL, 'l'}, | |
96 | {"retain", no_argument, NULL, 'r'}, | |
cc6743c2 | 97 | {"vrfdefaultname", required_argument, NULL, 'o'}, |
d4644d41 | 98 | {"graceful_restart", required_argument, NULL, 'K'}, |
c34b6b57 | 99 | #ifdef HAVE_NETLINK |
6b093863 DS |
100 | {"vrfwnetns", no_argument, NULL, 'n'}, |
101 | {"nl-bufsize", required_argument, NULL, 's'}, | |
102 | {"v6-rr-semantics", no_argument, NULL, OPTION_V6_RR_SEMANTICS}, | |
c34b6b57 | 103 | #endif /* HAVE_NETLINK */ |
6b093863 | 104 | {0}}; |
718e3744 | 105 | |
d62a17ae | 106 | zebra_capabilities_t _caps_p[] = { |
9d303b37 | 107 | ZCAP_NET_ADMIN, ZCAP_SYS_ADMIN, ZCAP_NET_RAW, |
edd7c245 | 108 | }; |
109 | ||
110 | /* zebra privileges to run with */ | |
d62a17ae | 111 | struct zebra_privs_t zserv_privs = { |
b2f36157 | 112 | #if defined(FRR_USER) && defined(FRR_GROUP) |
d62a17ae | 113 | .user = FRR_USER, |
114 | .group = FRR_GROUP, | |
edd7c245 | 115 | #endif |
116 | #ifdef VTY_GROUP | |
d62a17ae | 117 | .vty_group = VTY_GROUP, |
edd7c245 | 118 | #endif |
d62a17ae | 119 | .caps_p = _caps_p, |
120 | .cap_num_p = array_size(_caps_p), | |
121 | .cap_num_i = 0}; | |
edd7c245 | 122 | |
718e3744 | 123 | /* SIGHUP handler. */ |
d62a17ae | 124 | static void sighup(void) |
718e3744 | 125 | { |
d62a17ae | 126 | zlog_info("SIGHUP received"); |
718e3744 | 127 | |
d62a17ae | 128 | /* Reload of config file. */ |
129 | ; | |
718e3744 | 130 | } |
131 | ||
132 | /* SIGINT handler. */ | |
d62a17ae | 133 | static void sigint(void) |
718e3744 | 134 | { |
d62a17ae | 135 | struct vrf *vrf; |
136 | struct zebra_vrf *zvrf; | |
f3e33b69 QY |
137 | struct listnode *ln, *nn; |
138 | struct zserv *client; | |
ff2460d5 MS |
139 | static bool sigint_done; |
140 | ||
141 | if (sigint_done) | |
142 | return; | |
143 | ||
144 | sigint_done = true; | |
fe18ee2d | 145 | |
d62a17ae | 146 | zlog_notice("Terminating on signal"); |
718e3744 | 147 | |
03951374 | 148 | frr_early_fini(); |
718e3744 | 149 | |
4dfd7a02 MS |
150 | zebra_dplane_pre_finish(); |
151 | ||
161e9ab7 | 152 | for (ALL_LIST_ELEMENTS(zrouter.client_list, ln, nn, client)) |
f3e33b69 QY |
153 | zserv_close_client(client); |
154 | ||
41674562 | 155 | zserv_close(); |
161e9ab7 | 156 | list_delete_all_node(zrouter.client_list); |
41674562 | 157 | |
f88bd20c | 158 | zebra_ptm_finish(); |
d62a17ae | 159 | |
160 | if (retain_mode) | |
a2addae8 | 161 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
d62a17ae | 162 | zvrf = vrf->info; |
163 | if (zvrf) | |
164 | SET_FLAG(zvrf->flags, ZEBRA_VRF_RETAIN); | |
165 | } | |
e2353ec2 DS |
166 | if (zrouter.lsp_process_q) |
167 | work_queue_free_and_null(&zrouter.lsp_process_q); | |
d62a17ae | 168 | vrf_terminate(); |
169 | ||
62b8bb7a | 170 | ns_walk_func(zebra_ns_early_shutdown); |
e27dec3c | 171 | zebra_ns_notify_close(); |
d62a17ae | 172 | |
173 | access_list_reset(); | |
174 | prefix_list_reset(); | |
175 | route_map_finish(); | |
03951374 | 176 | |
161e9ab7 | 177 | list_delete(&zrouter.client_list); |
4dfd7a02 | 178 | |
ff2460d5 MS |
179 | /* Indicate that all new dplane work has been enqueued. When that |
180 | * work is complete, the dataplane will enqueue an event | |
181 | * with the 'finalize' function. | |
182 | */ | |
1d11b21f | 183 | zebra_dplane_finish(); |
4dfd7a02 MS |
184 | } |
185 | ||
ff2460d5 MS |
186 | /* |
187 | * Final shutdown step for the zebra main thread. This is run after all | |
188 | * async update processing has completed. | |
189 | */ | |
4dfd7a02 MS |
190 | int zebra_finalize(struct thread *dummy) |
191 | { | |
192 | zlog_info("Zebra final shutdown"); | |
193 | ||
62b8bb7a MS |
194 | /* Final shutdown of ns resources */ |
195 | ns_walk_func(zebra_ns_final_shutdown); | |
196 | ||
4dfd7a02 MS |
197 | /* Stop dplane thread and finish any cleanup */ |
198 | zebra_dplane_shutdown(); | |
1d11b21f | 199 | |
89272910 DS |
200 | zebra_router_terminate(); |
201 | ||
03951374 | 202 | frr_fini(); |
d62a17ae | 203 | exit(0); |
718e3744 | 204 | } |
205 | ||
206 | /* SIGUSR1 handler. */ | |
d62a17ae | 207 | static void sigusr1(void) |
718e3744 | 208 | { |
d62a17ae | 209 | zlog_rotate(); |
718e3744 | 210 | } |
211 | ||
d62a17ae | 212 | struct quagga_signal_t zebra_signals[] = { |
213 | { | |
214 | .signal = SIGHUP, | |
215 | .handler = &sighup, | |
216 | }, | |
217 | { | |
218 | .signal = SIGUSR1, | |
219 | .handler = &sigusr1, | |
220 | }, | |
221 | { | |
222 | .signal = SIGINT, | |
223 | .handler = &sigint, | |
224 | }, | |
225 | { | |
226 | .signal = SIGTERM, | |
227 | .handler = &sigint, | |
228 | }, | |
2d75d052 | 229 | }; |
b72ede27 | 230 | |
8fcdd0d6 | 231 | static const struct frr_yang_module_info *zebra_yang_modules[] = { |
a4bed468 | 232 | &frr_interface_info, |
8fcdd0d6 RW |
233 | }; |
234 | ||
d62a17ae | 235 | FRR_DAEMON_INFO( |
236 | zebra, ZEBRA, .vty_port = ZEBRA_VTY_PORT, .flags = FRR_NO_ZCLIENT, | |
4f04a76b | 237 | |
d62a17ae | 238 | .proghelp = |
239 | "Daemon which manages kernel routing table management " | |
4f04a76b DL |
240 | "and\nredistribution between different routing protocols.", |
241 | ||
d62a17ae | 242 | .signals = zebra_signals, .n_signals = array_size(zebra_signals), |
4f04a76b | 243 | |
8fcdd0d6 RW |
244 | .privs = &zserv_privs, |
245 | ||
246 | .yang_modules = zebra_yang_modules, | |
247 | .n_yang_modules = array_size(zebra_yang_modules), ) | |
4f04a76b | 248 | |
718e3744 | 249 | /* Main startup routine. */ |
d62a17ae | 250 | int main(int argc, char **argv) |
718e3744 | 251 | { |
d62a17ae | 252 | // int batch_mode = 0; |
253 | char *zserv_path = NULL; | |
53af0706 | 254 | char *vrf_default_name_configured = NULL; |
d62a17ae | 255 | /* Socket to external label manager */ |
256 | char *lblmgr_path = NULL; | |
689f5a8c DL |
257 | struct sockaddr_storage dummy; |
258 | socklen_t dummylen; | |
411314ed | 259 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 | 260 | char *zapi_fuzzing = NULL; |
acfa8927 SW |
261 | #endif /* HANDLE_ZAPI_FUZZING */ |
262 | #if defined(HANDLE_NETLINK_FUZZING) | |
81a2f870 | 263 | char *netlink_fuzzing = NULL; |
acfa8927 | 264 | #endif /* HANDLE_NETLINK_FUZZING */ |
fea12efb | 265 | |
d4644d41 | 266 | graceful_restart = 0; |
78dd30b2 | 267 | vrf_configure_backend(VRF_BACKEND_VRF_LITE); |
996c9314 | 268 | logicalrouter_configure_backend(LOGICALROUTER_BACKEND_NETNS); |
78dd30b2 | 269 | |
d62a17ae | 270 | frr_preinit(&zebra_di, argc, argv); |
718e3744 | 271 | |
d62a17ae | 272 | frr_opt_add( |
33656d2d | 273 | "baz:e:l:o:rK:" |
4f04a76b | 274 | #ifdef HAVE_NETLINK |
78dd30b2 | 275 | "s:n" |
411314ed DS |
276 | #endif |
277 | #if defined(HANDLE_ZAPI_FUZZING) | |
acfa8927 SW |
278 | "c:" |
279 | #endif /* HANDLE_ZAPI_FUZZING */ | |
280 | #if defined(HANDLE_NETLINK_FUZZING) | |
281 | "w:" | |
282 | #endif /* HANDLE_NETLINK_FUZZING */ | |
d62a17ae | 283 | , |
284 | longopts, | |
d4644d41 DS |
285 | " -b, --batch Runs in batch mode\n" |
286 | " -a, --allow_delete Allow other processes to delete zebra routes\n" | |
287 | " -z, --socket Set path of zebra socket\n" | |
288 | " -e, --ecmp Specify ECMP to use.\n" | |
289 | " -l, --label_socket Socket to external label manager\n" | |
d4644d41 DS |
290 | " -r, --retain When program terminates, retain added route by zebra.\n" |
291 | " -o, --vrfdefaultname Set default VRF name.\n" | |
292 | " -K, --graceful_restart Graceful restart at the kernel level, timer in seconds for expiration\n" | |
4f04a76b | 293 | #ifdef HAVE_NETLINK |
d4644d41 DS |
294 | " -n, --vrfwnetns Use NetNS as VRF backend\n" |
295 | " -s, --nl-bufsize Set netlink receive buffer size\n" | |
296 | " --v6-rr-semantics Use v6 RR semantics\n" | |
4f04a76b | 297 | #endif /* HAVE_NETLINK */ |
411314ed | 298 | #if defined(HANDLE_ZAPI_FUZZING) |
d4644d41 | 299 | " -c <file> Bypass normal startup and use this file for testing of zapi\n" |
acfa8927 SW |
300 | #endif /* HANDLE_ZAPI_FUZZING */ |
301 | #if defined(HANDLE_NETLINK_FUZZING) | |
d4644d41 | 302 | " -w <file> Bypass normal startup and use this file for testing of netlink input\n" |
acfa8927 | 303 | #endif /* HANDLE_NETLINK_FUZZING */ |
6b093863 | 304 | ); |
d62a17ae | 305 | |
306 | while (1) { | |
307 | int opt = frr_getopt(argc, argv, NULL); | |
308 | ||
309 | if (opt == EOF) | |
310 | break; | |
311 | ||
312 | switch (opt) { | |
313 | case 0: | |
314 | break; | |
315 | case 'b': | |
316 | // batch_mode = 1; | |
317 | break; | |
318 | case 'a': | |
319 | allow_delete = 1; | |
320 | break; | |
d62a17ae | 321 | case 'e': |
b3f2b590 DS |
322 | zrouter.multipath_num = atoi(optarg); |
323 | if (zrouter.multipath_num > MULTIPATH_NUM | |
324 | || zrouter.multipath_num <= 0) { | |
af4c2728 | 325 | flog_err( |
e914ccbe | 326 | EC_ZEBRA_BAD_MULTIPATH_NUM, |
d62a17ae | 327 | "Multipath Number specified must be less than %d and greater than 0", |
328 | MULTIPATH_NUM); | |
329 | return 1; | |
330 | } | |
331 | break; | |
cc6743c2 | 332 | case 'o': |
53af0706 | 333 | vrf_default_name_configured = optarg; |
cc6743c2 | 334 | break; |
d62a17ae | 335 | case 'z': |
336 | zserv_path = optarg; | |
689f5a8c DL |
337 | if (!frr_zclient_addr(&dummy, &dummylen, optarg)) { |
338 | fprintf(stderr, | |
339 | "Invalid zserv socket path: %s\n", | |
340 | optarg); | |
341 | exit(1); | |
342 | } | |
d62a17ae | 343 | break; |
344 | case 'l': | |
345 | lblmgr_path = optarg; | |
346 | break; | |
347 | case 'r': | |
348 | retain_mode = 1; | |
349 | break; | |
d4644d41 | 350 | case 'K': |
d4644d41 DS |
351 | graceful_restart = atoi(optarg); |
352 | break; | |
c34b6b57 | 353 | #ifdef HAVE_NETLINK |
d62a17ae | 354 | case 's': |
355 | nl_rcvbufsize = atoi(optarg); | |
356 | break; | |
78dd30b2 PG |
357 | case 'n': |
358 | vrf_configure_backend(VRF_BACKEND_NETNS); | |
736d41ad | 359 | logicalrouter_configure_backend( |
996c9314 | 360 | LOGICALROUTER_BACKEND_OFF); |
78dd30b2 | 361 | break; |
6b093863 DS |
362 | case OPTION_V6_RR_SEMANTICS: |
363 | v6_rr_semantics = true; | |
364 | break; | |
c34b6b57 | 365 | #endif /* HAVE_NETLINK */ |
411314ed DS |
366 | #if defined(HANDLE_ZAPI_FUZZING) |
367 | case 'c': | |
81a2f870 | 368 | zapi_fuzzing = optarg; |
81a2f870 | 369 | break; |
acfa8927 SW |
370 | #endif /* HANDLE_ZAPI_FUZZING */ |
371 | #if defined(HANDLE_NETLINK_FUZZING) | |
81a2f870 SW |
372 | case 'w': |
373 | netlink_fuzzing = optarg; | |
374 | /* This ensures we are aren't writing any of the | |
375 | * startup netlink messages that happen when we | |
376 | * just want to read. | |
377 | */ | |
acfa8927 | 378 | netlink_read = true; |
411314ed | 379 | break; |
acfa8927 | 380 | #endif /* HANDLE_NETLINK_FUZZING */ |
d62a17ae | 381 | default: |
382 | frr_help_exit(1); | |
383 | break; | |
384 | } | |
718e3744 | 385 | } |
d62a17ae | 386 | |
3801e764 | 387 | zrouter.master = frr_init(); |
d62a17ae | 388 | |
d8c16a95 MS |
389 | /* Initialize pthread library */ |
390 | frr_pthread_init(); | |
391 | ||
d62a17ae | 392 | /* Zebra related initialize. */ |
89272910 | 393 | zebra_router_init(); |
5f145fb8 | 394 | zserv_init(); |
d62a17ae | 395 | rib_init(); |
396 | zebra_if_init(); | |
397 | zebra_debug_init(); | |
398 | router_id_cmd_init(); | |
f84fc2c9 DS |
399 | |
400 | /* | |
401 | * Initialize NS( and implicitly the VRF module), and make kernel | |
402 | * routing socket. */ | |
edbc3322 | 403 | zebra_ns_init((const char *)vrf_default_name_configured); |
f84fc2c9 | 404 | zebra_vty_init(); |
d62a17ae | 405 | access_list_init(); |
406 | prefix_list_init(); | |
407 | #if defined(HAVE_RTADV) | |
408 | rtadv_cmd_init(); | |
36735ed9 | 409 | #endif |
d62a17ae | 410 | /* PTM socket */ |
244c1cdc | 411 | #ifdef ZEBRA_PTM_SUPPORT |
d62a17ae | 412 | zebra_ptm_init(); |
244c1cdc | 413 | #endif |
718e3744 | 414 | |
d62a17ae | 415 | zebra_mpls_init(); |
416 | zebra_mpls_vty_init(); | |
2dd0d726 | 417 | zebra_pw_vty_init(); |
4c0ec639 | 418 | zebra_pbr_init(); |
7758e3f3 | 419 | |
996c9314 LB |
420 | /* For debug purpose. */ |
421 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
718e3744 | 422 | |
d62a17ae | 423 | /* Process the configuration file. Among other configuration |
9d303b37 DL |
424 | * directives we can meet those installing static routes. Such |
425 | * requests will not be executed immediately, but queued in | |
426 | * zebra->ribq structure until we enter the main execution loop. | |
427 | * The notifications from kernel will show originating PID equal | |
428 | * to that after daemon() completes (if ever called). | |
429 | */ | |
d62a17ae | 430 | frr_config_fork(); |
718e3744 | 431 | |
d62a17ae | 432 | /* After we have successfully acquired the pidfile, we can be sure |
9d303b37 DL |
433 | * about being the only copy of zebra process, which is submitting |
434 | * changes to the FIB. | |
435 | * Clean up zebra-originated routes. The requests will be sent to OS | |
436 | * immediately, so originating PID in notifications from kernel | |
437 | * will be equal to the current getpid(). To know about such routes, | |
438 | * we have to have route_read() called before. | |
439 | */ | |
d4644d41 | 440 | zrouter.startup_time = monotime(NULL); |
33656d2d DS |
441 | thread_add_timer(zrouter.master, rib_sweep_route, |
442 | NULL, graceful_restart, NULL); | |
91b7351d | 443 | |
d62a17ae | 444 | /* Needed for BSD routing socket. */ |
445 | pid = getpid(); | |
718e3744 | 446 | |
e5a60d82 MS |
447 | /* Start dataplane system */ |
448 | zebra_dplane_start(); | |
449 | ||
21ccc0cf QY |
450 | /* Start Zebra API server */ |
451 | zserv_start(zserv_path); | |
97be79f9 | 452 | |
d62a17ae | 453 | /* Init label manager */ |
454 | label_manager_init(lblmgr_path); | |
fea12efb | 455 | |
453844ab QY |
456 | /* RNH init */ |
457 | zebra_rnh_init(); | |
89272910 | 458 | |
27627f9a KA |
459 | /* Config handler Init */ |
460 | zebra_evpn_init(); | |
461 | ||
5ad4c39c QY |
462 | /* Error init */ |
463 | zebra_error_init(); | |
453844ab | 464 | |
2875801f | 465 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 SW |
466 | if (zapi_fuzzing) { |
467 | zserv_read_file(zapi_fuzzing); | |
468 | exit(0); | |
acfa8927 SW |
469 | } |
470 | #endif /* HANDLE_ZAPI_FUZZING */ | |
471 | #if defined(HANDLE_NETLINK_FUZZING) | |
472 | if (netlink_fuzzing) { | |
81a2f870 | 473 | netlink_read_init(netlink_fuzzing); |
2875801f QY |
474 | exit(0); |
475 | } | |
acfa8927 | 476 | #endif /* HANDLE_NETLINK_FUZZING */ |
2875801f QY |
477 | |
478 | ||
3801e764 | 479 | frr_run(zrouter.master); |
718e3744 | 480 | |
d62a17ae | 481 | /* Not reached... */ |
482 | return 0; | |
718e3744 | 483 | } |