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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" |
244c1cdc | 58 | |
acfa8927 | 59 | #if defined(HANDLE_NETLINK_FUZZING) |
81a2f870 | 60 | #include "zebra/kernel_netlink.h" |
acfa8927 | 61 | #endif /* HANDLE_NETLINK_FUZZING */ |
81a2f870 | 62 | |
244c1cdc | 63 | #define ZEBRA_PTM_SUPPORT |
718e3744 | 64 | |
b21b19c5 | 65 | /* Zebra instance */ |
d62a17ae | 66 | struct zebra_t zebrad = { |
a37ef435 | 67 | .packets_to_process = ZEBRA_ZAPI_PACKETS_TO_PROCESS, |
b21b19c5 | 68 | }; |
718e3744 | 69 | |
70 | /* process id. */ | |
718e3744 | 71 | pid_t pid; |
72 | ||
55c72803 | 73 | /* Pacify zclient.o in libfrr, which expects this variable. */ |
87efd646 | 74 | struct thread_master *master; |
75 | ||
718e3744 | 76 | /* Route retain mode flag. */ |
77 | int retain_mode = 0; | |
78 | ||
6baf7bb8 DS |
79 | /* Allow non-quagga entities to delete quagga routes */ |
80 | int allow_delete = 0; | |
81 | ||
718e3744 | 82 | /* Don't delete kernel route. */ |
83 | int keep_kernel_mode = 0; | |
84 | ||
6b093863 DS |
85 | bool v6_rr_semantics = false; |
86 | ||
c34b6b57 | 87 | #ifdef HAVE_NETLINK |
88 | /* Receive buffer size for netlink socket */ | |
d7c0a89a | 89 | uint32_t nl_rcvbufsize = 4194304; |
c34b6b57 | 90 | #endif /* HAVE_NETLINK */ |
91 | ||
6b093863 | 92 | #define OPTION_V6_RR_SEMANTICS 2000 |
718e3744 | 93 | /* Command line options. */ |
6b093863 DS |
94 | struct option longopts[] = { |
95 | {"batch", no_argument, NULL, 'b'}, | |
96 | {"allow_delete", no_argument, NULL, 'a'}, | |
97 | {"keep_kernel", no_argument, NULL, 'k'}, | |
98 | {"socket", required_argument, NULL, 'z'}, | |
99 | {"ecmp", required_argument, NULL, 'e'}, | |
100 | {"label_socket", no_argument, NULL, 'l'}, | |
101 | {"retain", no_argument, NULL, 'r'}, | |
cc6743c2 | 102 | {"vrfdefaultname", required_argument, NULL, 'o'}, |
c34b6b57 | 103 | #ifdef HAVE_NETLINK |
6b093863 DS |
104 | {"vrfwnetns", no_argument, NULL, 'n'}, |
105 | {"nl-bufsize", required_argument, NULL, 's'}, | |
106 | {"v6-rr-semantics", no_argument, NULL, OPTION_V6_RR_SEMANTICS}, | |
c34b6b57 | 107 | #endif /* HAVE_NETLINK */ |
6b093863 | 108 | {0}}; |
718e3744 | 109 | |
d62a17ae | 110 | zebra_capabilities_t _caps_p[] = { |
9d303b37 | 111 | ZCAP_NET_ADMIN, ZCAP_SYS_ADMIN, ZCAP_NET_RAW, |
edd7c245 | 112 | }; |
113 | ||
114 | /* zebra privileges to run with */ | |
d62a17ae | 115 | struct zebra_privs_t zserv_privs = { |
b2f36157 | 116 | #if defined(FRR_USER) && defined(FRR_GROUP) |
d62a17ae | 117 | .user = FRR_USER, |
118 | .group = FRR_GROUP, | |
edd7c245 | 119 | #endif |
120 | #ifdef VTY_GROUP | |
d62a17ae | 121 | .vty_group = VTY_GROUP, |
edd7c245 | 122 | #endif |
d62a17ae | 123 | .caps_p = _caps_p, |
124 | .cap_num_p = array_size(_caps_p), | |
125 | .cap_num_i = 0}; | |
edd7c245 | 126 | |
37fe7731 DS |
127 | unsigned int multipath_num = MULTIPATH_NUM; |
128 | ||
718e3744 | 129 | /* SIGHUP handler. */ |
d62a17ae | 130 | static void sighup(void) |
718e3744 | 131 | { |
d62a17ae | 132 | zlog_info("SIGHUP received"); |
718e3744 | 133 | |
d62a17ae | 134 | /* Reload of config file. */ |
135 | ; | |
718e3744 | 136 | } |
137 | ||
138 | /* SIGINT handler. */ | |
d62a17ae | 139 | static void sigint(void) |
718e3744 | 140 | { |
d62a17ae | 141 | struct vrf *vrf; |
142 | struct zebra_vrf *zvrf; | |
f3e33b69 QY |
143 | struct listnode *ln, *nn; |
144 | struct zserv *client; | |
ff2460d5 MS |
145 | static bool sigint_done; |
146 | ||
147 | if (sigint_done) | |
148 | return; | |
149 | ||
150 | sigint_done = true; | |
fe18ee2d | 151 | |
d62a17ae | 152 | zlog_notice("Terminating on signal"); |
718e3744 | 153 | |
03951374 | 154 | frr_early_fini(); |
718e3744 | 155 | |
4dfd7a02 MS |
156 | zebra_dplane_pre_finish(); |
157 | ||
161e9ab7 | 158 | for (ALL_LIST_ELEMENTS(zrouter.client_list, ln, nn, client)) |
f3e33b69 QY |
159 | zserv_close_client(client); |
160 | ||
161e9ab7 | 161 | list_delete_all_node(zrouter.client_list); |
f88bd20c | 162 | zebra_ptm_finish(); |
d62a17ae | 163 | |
164 | if (retain_mode) | |
a2addae8 | 165 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
d62a17ae | 166 | zvrf = vrf->info; |
167 | if (zvrf) | |
168 | SET_FLAG(zvrf->flags, ZEBRA_VRF_RETAIN); | |
169 | } | |
40289934 | 170 | if (zebrad.lsp_process_q) |
e208c8f9 | 171 | work_queue_free_and_null(&zebrad.lsp_process_q); |
d62a17ae | 172 | vrf_terminate(); |
173 | ||
62b8bb7a | 174 | ns_walk_func(zebra_ns_early_shutdown); |
e27dec3c | 175 | zebra_ns_notify_close(); |
d62a17ae | 176 | |
177 | access_list_reset(); | |
178 | prefix_list_reset(); | |
179 | route_map_finish(); | |
03951374 | 180 | |
161e9ab7 | 181 | list_delete(&zrouter.client_list); |
4dfd7a02 | 182 | |
ff2460d5 MS |
183 | /* Indicate that all new dplane work has been enqueued. When that |
184 | * work is complete, the dataplane will enqueue an event | |
185 | * with the 'finalize' function. | |
186 | */ | |
1d11b21f | 187 | zebra_dplane_finish(); |
4dfd7a02 MS |
188 | } |
189 | ||
ff2460d5 MS |
190 | /* |
191 | * Final shutdown step for the zebra main thread. This is run after all | |
192 | * async update processing has completed. | |
193 | */ | |
4dfd7a02 MS |
194 | int zebra_finalize(struct thread *dummy) |
195 | { | |
196 | zlog_info("Zebra final shutdown"); | |
197 | ||
62b8bb7a MS |
198 | /* Final shutdown of ns resources */ |
199 | ns_walk_func(zebra_ns_final_shutdown); | |
200 | ||
4dfd7a02 MS |
201 | /* Stop dplane thread and finish any cleanup */ |
202 | zebra_dplane_shutdown(); | |
1d11b21f | 203 | |
89272910 DS |
204 | zebra_router_terminate(); |
205 | ||
03951374 | 206 | frr_fini(); |
d62a17ae | 207 | exit(0); |
718e3744 | 208 | } |
209 | ||
210 | /* SIGUSR1 handler. */ | |
d62a17ae | 211 | static void sigusr1(void) |
718e3744 | 212 | { |
d62a17ae | 213 | zlog_rotate(); |
718e3744 | 214 | } |
215 | ||
d62a17ae | 216 | struct quagga_signal_t zebra_signals[] = { |
217 | { | |
218 | .signal = SIGHUP, | |
219 | .handler = &sighup, | |
220 | }, | |
221 | { | |
222 | .signal = SIGUSR1, | |
223 | .handler = &sigusr1, | |
224 | }, | |
225 | { | |
226 | .signal = SIGINT, | |
227 | .handler = &sigint, | |
228 | }, | |
229 | { | |
230 | .signal = SIGTERM, | |
231 | .handler = &sigint, | |
232 | }, | |
2d75d052 | 233 | }; |
b72ede27 | 234 | |
8fcdd0d6 | 235 | static const struct frr_yang_module_info *zebra_yang_modules[] = { |
a4bed468 | 236 | &frr_interface_info, |
8fcdd0d6 RW |
237 | }; |
238 | ||
d62a17ae | 239 | FRR_DAEMON_INFO( |
240 | zebra, ZEBRA, .vty_port = ZEBRA_VTY_PORT, .flags = FRR_NO_ZCLIENT, | |
4f04a76b | 241 | |
d62a17ae | 242 | .proghelp = |
243 | "Daemon which manages kernel routing table management " | |
4f04a76b DL |
244 | "and\nredistribution between different routing protocols.", |
245 | ||
d62a17ae | 246 | .signals = zebra_signals, .n_signals = array_size(zebra_signals), |
4f04a76b | 247 | |
8fcdd0d6 RW |
248 | .privs = &zserv_privs, |
249 | ||
250 | .yang_modules = zebra_yang_modules, | |
251 | .n_yang_modules = array_size(zebra_yang_modules), ) | |
4f04a76b | 252 | |
718e3744 | 253 | /* Main startup routine. */ |
d62a17ae | 254 | int main(int argc, char **argv) |
718e3744 | 255 | { |
d62a17ae | 256 | // int batch_mode = 0; |
257 | char *zserv_path = NULL; | |
53af0706 | 258 | char *vrf_default_name_configured = NULL; |
d62a17ae | 259 | /* Socket to external label manager */ |
260 | char *lblmgr_path = NULL; | |
689f5a8c DL |
261 | struct sockaddr_storage dummy; |
262 | socklen_t dummylen; | |
411314ed | 263 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 | 264 | char *zapi_fuzzing = NULL; |
acfa8927 SW |
265 | #endif /* HANDLE_ZAPI_FUZZING */ |
266 | #if defined(HANDLE_NETLINK_FUZZING) | |
81a2f870 | 267 | char *netlink_fuzzing = NULL; |
acfa8927 | 268 | #endif /* HANDLE_NETLINK_FUZZING */ |
fea12efb | 269 | |
78dd30b2 | 270 | vrf_configure_backend(VRF_BACKEND_VRF_LITE); |
996c9314 | 271 | logicalrouter_configure_backend(LOGICALROUTER_BACKEND_NETNS); |
78dd30b2 | 272 | |
d62a17ae | 273 | frr_preinit(&zebra_di, argc, argv); |
718e3744 | 274 | |
d62a17ae | 275 | frr_opt_add( |
cc6743c2 | 276 | "bakz:e:l:o:r" |
4f04a76b | 277 | #ifdef HAVE_NETLINK |
78dd30b2 | 278 | "s:n" |
411314ed DS |
279 | #endif |
280 | #if defined(HANDLE_ZAPI_FUZZING) | |
acfa8927 SW |
281 | "c:" |
282 | #endif /* HANDLE_ZAPI_FUZZING */ | |
283 | #if defined(HANDLE_NETLINK_FUZZING) | |
284 | "w:" | |
285 | #endif /* HANDLE_NETLINK_FUZZING */ | |
d62a17ae | 286 | , |
287 | longopts, | |
6b093863 DS |
288 | " -b, --batch Runs in batch mode\n" |
289 | " -a, --allow_delete Allow other processes to delete zebra routes\n" | |
290 | " -z, --socket Set path of zebra socket\n" | |
291 | " -e, --ecmp Specify ECMP to use.\n" | |
292 | " -l, --label_socket Socket to external label manager\n" | |
f6b66ba9 | 293 | " -k, --keep_kernel Don't delete old routes which were installed by zebra.\n" |
6b093863 | 294 | " -r, --retain When program terminates, retain added route by zebra.\n" |
cc6743c2 | 295 | " -o, --vrfdefaultname Set default VRF name.\n" |
4f04a76b | 296 | #ifdef HAVE_NETLINK |
f6b66ba9 | 297 | " -n, --vrfwnetns Use NetNS as VRF backend\n" |
6b093863 DS |
298 | " -s, --nl-bufsize Set netlink receive buffer size\n" |
299 | " --v6-rr-semantics Use v6 RR semantics\n" | |
4f04a76b | 300 | #endif /* HAVE_NETLINK */ |
411314ed | 301 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 | 302 | " -c <file> Bypass normal startup and use this file for testing of zapi\n" |
acfa8927 SW |
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 */ | |
6b093863 | 307 | ); |
d62a17ae | 308 | |
309 | while (1) { | |
310 | int opt = frr_getopt(argc, argv, NULL); | |
311 | ||
312 | if (opt == EOF) | |
313 | break; | |
314 | ||
315 | switch (opt) { | |
316 | case 0: | |
317 | break; | |
318 | case 'b': | |
319 | // batch_mode = 1; | |
320 | break; | |
321 | case 'a': | |
322 | allow_delete = 1; | |
323 | break; | |
324 | case 'k': | |
325 | keep_kernel_mode = 1; | |
326 | break; | |
327 | case 'e': | |
328 | multipath_num = atoi(optarg); | |
329 | if (multipath_num > MULTIPATH_NUM | |
330 | || multipath_num <= 0) { | |
af4c2728 | 331 | flog_err( |
e914ccbe | 332 | EC_ZEBRA_BAD_MULTIPATH_NUM, |
d62a17ae | 333 | "Multipath Number specified must be less than %d and greater than 0", |
334 | MULTIPATH_NUM); | |
335 | return 1; | |
336 | } | |
337 | break; | |
cc6743c2 | 338 | case 'o': |
53af0706 | 339 | vrf_default_name_configured = optarg; |
cc6743c2 | 340 | break; |
d62a17ae | 341 | case 'z': |
342 | zserv_path = optarg; | |
689f5a8c DL |
343 | if (!frr_zclient_addr(&dummy, &dummylen, optarg)) { |
344 | fprintf(stderr, | |
345 | "Invalid zserv socket path: %s\n", | |
346 | optarg); | |
347 | exit(1); | |
348 | } | |
d62a17ae | 349 | break; |
350 | case 'l': | |
351 | lblmgr_path = optarg; | |
352 | break; | |
353 | case 'r': | |
354 | retain_mode = 1; | |
355 | break; | |
c34b6b57 | 356 | #ifdef HAVE_NETLINK |
d62a17ae | 357 | case 's': |
358 | nl_rcvbufsize = atoi(optarg); | |
359 | break; | |
78dd30b2 PG |
360 | case 'n': |
361 | vrf_configure_backend(VRF_BACKEND_NETNS); | |
736d41ad | 362 | logicalrouter_configure_backend( |
996c9314 | 363 | LOGICALROUTER_BACKEND_OFF); |
78dd30b2 | 364 | break; |
6b093863 DS |
365 | case OPTION_V6_RR_SEMANTICS: |
366 | v6_rr_semantics = true; | |
367 | break; | |
c34b6b57 | 368 | #endif /* HAVE_NETLINK */ |
411314ed DS |
369 | #if defined(HANDLE_ZAPI_FUZZING) |
370 | case 'c': | |
81a2f870 | 371 | zapi_fuzzing = optarg; |
81a2f870 | 372 | break; |
acfa8927 SW |
373 | #endif /* HANDLE_ZAPI_FUZZING */ |
374 | #if defined(HANDLE_NETLINK_FUZZING) | |
81a2f870 SW |
375 | case 'w': |
376 | netlink_fuzzing = optarg; | |
377 | /* This ensures we are aren't writing any of the | |
378 | * startup netlink messages that happen when we | |
379 | * just want to read. | |
380 | */ | |
acfa8927 | 381 | netlink_read = true; |
411314ed | 382 | break; |
acfa8927 | 383 | #endif /* HANDLE_NETLINK_FUZZING */ |
d62a17ae | 384 | default: |
385 | frr_help_exit(1); | |
386 | break; | |
387 | } | |
718e3744 | 388 | } |
d62a17ae | 389 | |
3801e764 | 390 | zrouter.master = frr_init(); |
d62a17ae | 391 | |
d8c16a95 MS |
392 | /* Initialize pthread library */ |
393 | frr_pthread_init(); | |
394 | ||
d62a17ae | 395 | /* Zebra related initialize. */ |
89272910 | 396 | zebra_router_init(); |
5f145fb8 | 397 | zserv_init(); |
d62a17ae | 398 | rib_init(); |
399 | zebra_if_init(); | |
400 | zebra_debug_init(); | |
401 | router_id_cmd_init(); | |
f84fc2c9 DS |
402 | |
403 | /* | |
404 | * Initialize NS( and implicitly the VRF module), and make kernel | |
405 | * routing socket. */ | |
edbc3322 | 406 | zebra_ns_init((const char *)vrf_default_name_configured); |
f84fc2c9 | 407 | zebra_vty_init(); |
d62a17ae | 408 | access_list_init(); |
409 | prefix_list_init(); | |
410 | #if defined(HAVE_RTADV) | |
411 | rtadv_cmd_init(); | |
36735ed9 | 412 | #endif |
d62a17ae | 413 | /* PTM socket */ |
244c1cdc | 414 | #ifdef ZEBRA_PTM_SUPPORT |
d62a17ae | 415 | zebra_ptm_init(); |
244c1cdc | 416 | #endif |
718e3744 | 417 | |
d62a17ae | 418 | zebra_mpls_init(); |
419 | zebra_mpls_vty_init(); | |
2dd0d726 | 420 | zebra_pw_vty_init(); |
4c0ec639 | 421 | zebra_pbr_init(); |
7758e3f3 | 422 | |
996c9314 LB |
423 | /* For debug purpose. */ |
424 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
718e3744 | 425 | |
d62a17ae | 426 | /* Process the configuration file. Among other configuration |
9d303b37 DL |
427 | * directives we can meet those installing static routes. Such |
428 | * requests will not be executed immediately, but queued in | |
429 | * zebra->ribq structure until we enter the main execution loop. | |
430 | * The notifications from kernel will show originating PID equal | |
431 | * to that after daemon() completes (if ever called). | |
432 | */ | |
d62a17ae | 433 | frr_config_fork(); |
718e3744 | 434 | |
d62a17ae | 435 | /* After we have successfully acquired the pidfile, we can be sure |
9d303b37 DL |
436 | * about being the only copy of zebra process, which is submitting |
437 | * changes to the FIB. | |
438 | * Clean up zebra-originated routes. The requests will be sent to OS | |
439 | * immediately, so originating PID in notifications from kernel | |
440 | * will be equal to the current getpid(). To know about such routes, | |
441 | * we have to have route_read() called before. | |
442 | */ | |
d62a17ae | 443 | if (!keep_kernel_mode) |
444 | rib_sweep_route(); | |
91b7351d | 445 | |
d62a17ae | 446 | /* Needed for BSD routing socket. */ |
447 | pid = getpid(); | |
718e3744 | 448 | |
e5a60d82 MS |
449 | /* Start dataplane system */ |
450 | zebra_dplane_start(); | |
451 | ||
21ccc0cf QY |
452 | /* Start Zebra API server */ |
453 | zserv_start(zserv_path); | |
97be79f9 | 454 | |
d62a17ae | 455 | /* Init label manager */ |
456 | label_manager_init(lblmgr_path); | |
fea12efb | 457 | |
453844ab QY |
458 | /* RNH init */ |
459 | zebra_rnh_init(); | |
89272910 | 460 | |
5ad4c39c QY |
461 | /* Error init */ |
462 | zebra_error_init(); | |
453844ab | 463 | |
2875801f | 464 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 SW |
465 | if (zapi_fuzzing) { |
466 | zserv_read_file(zapi_fuzzing); | |
467 | exit(0); | |
acfa8927 SW |
468 | } |
469 | #endif /* HANDLE_ZAPI_FUZZING */ | |
470 | #if defined(HANDLE_NETLINK_FUZZING) | |
471 | if (netlink_fuzzing) { | |
81a2f870 | 472 | netlink_read_init(netlink_fuzzing); |
2875801f QY |
473 | exit(0); |
474 | } | |
acfa8927 | 475 | #endif /* HANDLE_NETLINK_FUZZING */ |
2875801f QY |
476 | |
477 | ||
3801e764 | 478 | frr_run(zrouter.master); |
718e3744 | 479 | |
d62a17ae | 480 | /* Not reached... */ |
481 | return 0; | |
718e3744 | 482 | } |