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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 = { |
67 | .rtm_table_default = 0, | |
a37ef435 | 68 | .packets_to_process = ZEBRA_ZAPI_PACKETS_TO_PROCESS, |
b21b19c5 | 69 | }; |
718e3744 | 70 | |
71 | /* process id. */ | |
718e3744 | 72 | pid_t pid; |
73 | ||
55c72803 | 74 | /* Pacify zclient.o in libfrr, which expects this variable. */ |
87efd646 | 75 | struct thread_master *master; |
76 | ||
718e3744 | 77 | /* Route retain mode flag. */ |
78 | int retain_mode = 0; | |
79 | ||
6baf7bb8 DS |
80 | /* Allow non-quagga entities to delete quagga routes */ |
81 | int allow_delete = 0; | |
82 | ||
718e3744 | 83 | /* Don't delete kernel route. */ |
84 | int keep_kernel_mode = 0; | |
85 | ||
6b093863 DS |
86 | bool v6_rr_semantics = false; |
87 | ||
c34b6b57 | 88 | #ifdef HAVE_NETLINK |
89 | /* Receive buffer size for netlink socket */ | |
d7c0a89a | 90 | uint32_t nl_rcvbufsize = 4194304; |
c34b6b57 | 91 | #endif /* HAVE_NETLINK */ |
92 | ||
6b093863 | 93 | #define OPTION_V6_RR_SEMANTICS 2000 |
718e3744 | 94 | /* Command line options. */ |
6b093863 DS |
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'}, | |
cc6743c2 | 103 | {"vrfdefaultname", required_argument, NULL, 'o'}, |
c34b6b57 | 104 | #ifdef HAVE_NETLINK |
6b093863 DS |
105 | {"vrfwnetns", no_argument, NULL, 'n'}, |
106 | {"nl-bufsize", required_argument, NULL, 's'}, | |
107 | {"v6-rr-semantics", no_argument, NULL, OPTION_V6_RR_SEMANTICS}, | |
c34b6b57 | 108 | #endif /* HAVE_NETLINK */ |
6b093863 | 109 | {0}}; |
718e3744 | 110 | |
d62a17ae | 111 | zebra_capabilities_t _caps_p[] = { |
9d303b37 | 112 | ZCAP_NET_ADMIN, ZCAP_SYS_ADMIN, ZCAP_NET_RAW, |
edd7c245 | 113 | }; |
114 | ||
115 | /* zebra privileges to run with */ | |
d62a17ae | 116 | struct zebra_privs_t zserv_privs = { |
b2f36157 | 117 | #if defined(FRR_USER) && defined(FRR_GROUP) |
d62a17ae | 118 | .user = FRR_USER, |
119 | .group = FRR_GROUP, | |
edd7c245 | 120 | #endif |
121 | #ifdef VTY_GROUP | |
d62a17ae | 122 | .vty_group = VTY_GROUP, |
edd7c245 | 123 | #endif |
d62a17ae | 124 | .caps_p = _caps_p, |
125 | .cap_num_p = array_size(_caps_p), | |
126 | .cap_num_i = 0}; | |
edd7c245 | 127 | |
37fe7731 DS |
128 | unsigned int multipath_num = MULTIPATH_NUM; |
129 | ||
718e3744 | 130 | /* SIGHUP handler. */ |
d62a17ae | 131 | static void sighup(void) |
718e3744 | 132 | { |
d62a17ae | 133 | zlog_info("SIGHUP received"); |
718e3744 | 134 | |
d62a17ae | 135 | /* Reload of config file. */ |
136 | ; | |
718e3744 | 137 | } |
138 | ||
139 | /* SIGINT handler. */ | |
d62a17ae | 140 | static void sigint(void) |
718e3744 | 141 | { |
d62a17ae | 142 | struct vrf *vrf; |
143 | struct zebra_vrf *zvrf; | |
f3e33b69 QY |
144 | struct listnode *ln, *nn; |
145 | struct zserv *client; | |
fe18ee2d | 146 | |
d62a17ae | 147 | zlog_notice("Terminating on signal"); |
718e3744 | 148 | |
03951374 | 149 | frr_early_fini(); |
718e3744 | 150 | |
f3e33b69 QY |
151 | for (ALL_LIST_ELEMENTS(zebrad.client_list, ln, nn, client)) |
152 | zserv_close_client(client); | |
153 | ||
d62a17ae | 154 | list_delete_all_node(zebrad.client_list); |
f88bd20c | 155 | zebra_ptm_finish(); |
d62a17ae | 156 | |
157 | if (retain_mode) | |
a2addae8 | 158 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
d62a17ae | 159 | zvrf = vrf->info; |
160 | if (zvrf) | |
161 | SET_FLAG(zvrf->flags, ZEBRA_VRF_RETAIN); | |
162 | } | |
40289934 | 163 | if (zebrad.lsp_process_q) |
e208c8f9 | 164 | work_queue_free_and_null(&zebrad.lsp_process_q); |
d62a17ae | 165 | vrf_terminate(); |
166 | ||
ff705b15 | 167 | ns_walk_func(zebra_ns_disabled); |
e27dec3c | 168 | zebra_ns_notify_close(); |
d62a17ae | 169 | |
170 | access_list_reset(); | |
171 | prefix_list_reset(); | |
172 | route_map_finish(); | |
03951374 | 173 | |
6a154c88 | 174 | list_delete(&zebrad.client_list); |
e208c8f9 | 175 | work_queue_free_and_null(&zebrad.ribq); |
d62a17ae | 176 | meta_queue_free(zebrad.mq); |
d62a17ae | 177 | |
89272910 DS |
178 | zebra_router_terminate(); |
179 | ||
03951374 | 180 | frr_fini(); |
d62a17ae | 181 | exit(0); |
718e3744 | 182 | } |
183 | ||
184 | /* SIGUSR1 handler. */ | |
d62a17ae | 185 | static void sigusr1(void) |
718e3744 | 186 | { |
d62a17ae | 187 | zlog_rotate(); |
718e3744 | 188 | } |
189 | ||
d62a17ae | 190 | struct quagga_signal_t zebra_signals[] = { |
191 | { | |
192 | .signal = SIGHUP, | |
193 | .handler = &sighup, | |
194 | }, | |
195 | { | |
196 | .signal = SIGUSR1, | |
197 | .handler = &sigusr1, | |
198 | }, | |
199 | { | |
200 | .signal = SIGINT, | |
201 | .handler = &sigint, | |
202 | }, | |
203 | { | |
204 | .signal = SIGTERM, | |
205 | .handler = &sigint, | |
206 | }, | |
2d75d052 | 207 | }; |
b72ede27 | 208 | |
d62a17ae | 209 | FRR_DAEMON_INFO( |
210 | zebra, ZEBRA, .vty_port = ZEBRA_VTY_PORT, .flags = FRR_NO_ZCLIENT, | |
4f04a76b | 211 | |
d62a17ae | 212 | .proghelp = |
213 | "Daemon which manages kernel routing table management " | |
4f04a76b DL |
214 | "and\nredistribution between different routing protocols.", |
215 | ||
d62a17ae | 216 | .signals = zebra_signals, .n_signals = array_size(zebra_signals), |
4f04a76b | 217 | |
d62a17ae | 218 | .privs = &zserv_privs, ) |
4f04a76b | 219 | |
718e3744 | 220 | /* Main startup routine. */ |
d62a17ae | 221 | int main(int argc, char **argv) |
718e3744 | 222 | { |
d62a17ae | 223 | // int batch_mode = 0; |
224 | char *zserv_path = NULL; | |
225 | /* Socket to external label manager */ | |
226 | char *lblmgr_path = NULL; | |
689f5a8c DL |
227 | struct sockaddr_storage dummy; |
228 | socklen_t dummylen; | |
411314ed | 229 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 | 230 | char *zapi_fuzzing = NULL; |
acfa8927 SW |
231 | #endif /* HANDLE_ZAPI_FUZZING */ |
232 | #if defined(HANDLE_NETLINK_FUZZING) | |
81a2f870 | 233 | char *netlink_fuzzing = NULL; |
acfa8927 | 234 | #endif /* HANDLE_NETLINK_FUZZING */ |
fea12efb | 235 | |
78dd30b2 | 236 | vrf_configure_backend(VRF_BACKEND_VRF_LITE); |
996c9314 | 237 | logicalrouter_configure_backend(LOGICALROUTER_BACKEND_NETNS); |
78dd30b2 | 238 | |
d62a17ae | 239 | frr_preinit(&zebra_di, argc, argv); |
718e3744 | 240 | |
d62a17ae | 241 | frr_opt_add( |
cc6743c2 | 242 | "bakz:e:l:o:r" |
4f04a76b | 243 | #ifdef HAVE_NETLINK |
78dd30b2 | 244 | "s:n" |
411314ed DS |
245 | #endif |
246 | #if defined(HANDLE_ZAPI_FUZZING) | |
acfa8927 SW |
247 | "c:" |
248 | #endif /* HANDLE_ZAPI_FUZZING */ | |
249 | #if defined(HANDLE_NETLINK_FUZZING) | |
250 | "w:" | |
251 | #endif /* HANDLE_NETLINK_FUZZING */ | |
d62a17ae | 252 | , |
253 | longopts, | |
6b093863 DS |
254 | " -b, --batch Runs in batch mode\n" |
255 | " -a, --allow_delete Allow other processes to delete zebra routes\n" | |
256 | " -z, --socket Set path of zebra socket\n" | |
257 | " -e, --ecmp Specify ECMP to use.\n" | |
258 | " -l, --label_socket Socket to external label manager\n" | |
f6b66ba9 | 259 | " -k, --keep_kernel Don't delete old routes which were installed by zebra.\n" |
6b093863 | 260 | " -r, --retain When program terminates, retain added route by zebra.\n" |
cc6743c2 | 261 | " -o, --vrfdefaultname Set default VRF name.\n" |
4f04a76b | 262 | #ifdef HAVE_NETLINK |
f6b66ba9 | 263 | " -n, --vrfwnetns Use NetNS as VRF backend\n" |
6b093863 DS |
264 | " -s, --nl-bufsize Set netlink receive buffer size\n" |
265 | " --v6-rr-semantics Use v6 RR semantics\n" | |
4f04a76b | 266 | #endif /* HAVE_NETLINK */ |
411314ed | 267 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 | 268 | " -c <file> Bypass normal startup and use this file for testing of zapi\n" |
acfa8927 SW |
269 | #endif /* HANDLE_ZAPI_FUZZING */ |
270 | #if defined(HANDLE_NETLINK_FUZZING) | |
271 | " -w <file> Bypass normal startup and use this file for testing of netlink input\n" | |
272 | #endif /* HANDLE_NETLINK_FUZZING */ | |
6b093863 | 273 | ); |
d62a17ae | 274 | |
275 | while (1) { | |
276 | int opt = frr_getopt(argc, argv, NULL); | |
277 | ||
278 | if (opt == EOF) | |
279 | break; | |
280 | ||
281 | switch (opt) { | |
282 | case 0: | |
283 | break; | |
284 | case 'b': | |
285 | // batch_mode = 1; | |
286 | break; | |
287 | case 'a': | |
288 | allow_delete = 1; | |
289 | break; | |
290 | case 'k': | |
291 | keep_kernel_mode = 1; | |
292 | break; | |
293 | case 'e': | |
294 | multipath_num = atoi(optarg); | |
295 | if (multipath_num > MULTIPATH_NUM | |
296 | || multipath_num <= 0) { | |
af4c2728 | 297 | flog_err( |
e914ccbe | 298 | EC_ZEBRA_BAD_MULTIPATH_NUM, |
d62a17ae | 299 | "Multipath Number specified must be less than %d and greater than 0", |
300 | MULTIPATH_NUM); | |
301 | return 1; | |
302 | } | |
303 | break; | |
cc6743c2 PG |
304 | case 'o': |
305 | vrf_set_default_name(optarg); | |
306 | break; | |
d62a17ae | 307 | case 'z': |
308 | zserv_path = optarg; | |
689f5a8c DL |
309 | if (!frr_zclient_addr(&dummy, &dummylen, optarg)) { |
310 | fprintf(stderr, | |
311 | "Invalid zserv socket path: %s\n", | |
312 | optarg); | |
313 | exit(1); | |
314 | } | |
d62a17ae | 315 | break; |
316 | case 'l': | |
317 | lblmgr_path = optarg; | |
318 | break; | |
319 | case 'r': | |
320 | retain_mode = 1; | |
321 | break; | |
c34b6b57 | 322 | #ifdef HAVE_NETLINK |
d62a17ae | 323 | case 's': |
324 | nl_rcvbufsize = atoi(optarg); | |
325 | break; | |
78dd30b2 PG |
326 | case 'n': |
327 | vrf_configure_backend(VRF_BACKEND_NETNS); | |
736d41ad | 328 | logicalrouter_configure_backend( |
996c9314 | 329 | LOGICALROUTER_BACKEND_OFF); |
78dd30b2 | 330 | break; |
6b093863 DS |
331 | case OPTION_V6_RR_SEMANTICS: |
332 | v6_rr_semantics = true; | |
333 | break; | |
c34b6b57 | 334 | #endif /* HAVE_NETLINK */ |
411314ed DS |
335 | #if defined(HANDLE_ZAPI_FUZZING) |
336 | case 'c': | |
81a2f870 | 337 | zapi_fuzzing = optarg; |
81a2f870 | 338 | break; |
acfa8927 SW |
339 | #endif /* HANDLE_ZAPI_FUZZING */ |
340 | #if defined(HANDLE_NETLINK_FUZZING) | |
81a2f870 SW |
341 | case 'w': |
342 | netlink_fuzzing = optarg; | |
343 | /* This ensures we are aren't writing any of the | |
344 | * startup netlink messages that happen when we | |
345 | * just want to read. | |
346 | */ | |
acfa8927 | 347 | netlink_read = true; |
411314ed | 348 | break; |
acfa8927 | 349 | #endif /* HANDLE_NETLINK_FUZZING */ |
d62a17ae | 350 | default: |
351 | frr_help_exit(1); | |
352 | break; | |
353 | } | |
718e3744 | 354 | } |
d62a17ae | 355 | |
356 | vty_config_lockless(); | |
357 | zebrad.master = frr_init(); | |
358 | ||
359 | /* Zebra related initialize. */ | |
89272910 | 360 | zebra_router_init(); |
5f145fb8 | 361 | zserv_init(); |
d62a17ae | 362 | rib_init(); |
363 | zebra_if_init(); | |
364 | zebra_debug_init(); | |
365 | router_id_cmd_init(); | |
f84fc2c9 DS |
366 | |
367 | /* | |
368 | * Initialize NS( and implicitly the VRF module), and make kernel | |
369 | * routing socket. */ | |
370 | zebra_ns_init(); | |
371 | ||
372 | zebra_vty_init(); | |
d62a17ae | 373 | access_list_init(); |
374 | prefix_list_init(); | |
375 | #if defined(HAVE_RTADV) | |
376 | rtadv_cmd_init(); | |
36735ed9 | 377 | #endif |
d62a17ae | 378 | /* PTM socket */ |
244c1cdc | 379 | #ifdef ZEBRA_PTM_SUPPORT |
d62a17ae | 380 | zebra_ptm_init(); |
244c1cdc | 381 | #endif |
718e3744 | 382 | |
d62a17ae | 383 | zebra_mpls_init(); |
384 | zebra_mpls_vty_init(); | |
2dd0d726 | 385 | zebra_pw_vty_init(); |
4c0ec639 | 386 | zebra_pbr_init(); |
7758e3f3 | 387 | |
996c9314 LB |
388 | /* For debug purpose. */ |
389 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
718e3744 | 390 | |
d62a17ae | 391 | /* Process the configuration file. Among other configuration |
9d303b37 DL |
392 | * directives we can meet those installing static routes. Such |
393 | * requests will not be executed immediately, but queued in | |
394 | * zebra->ribq structure until we enter the main execution loop. | |
395 | * The notifications from kernel will show originating PID equal | |
396 | * to that after daemon() completes (if ever called). | |
397 | */ | |
d62a17ae | 398 | frr_config_fork(); |
718e3744 | 399 | |
d62a17ae | 400 | /* After we have successfully acquired the pidfile, we can be sure |
9d303b37 DL |
401 | * about being the only copy of zebra process, which is submitting |
402 | * changes to the FIB. | |
403 | * Clean up zebra-originated routes. The requests will be sent to OS | |
404 | * immediately, so originating PID in notifications from kernel | |
405 | * will be equal to the current getpid(). To know about such routes, | |
406 | * we have to have route_read() called before. | |
407 | */ | |
d62a17ae | 408 | if (!keep_kernel_mode) |
409 | rib_sweep_route(); | |
91b7351d | 410 | |
d62a17ae | 411 | /* Needed for BSD routing socket. */ |
412 | pid = getpid(); | |
718e3744 | 413 | |
21ccc0cf | 414 | /* Intialize pthread library */ |
329e35da QY |
415 | frr_pthread_init(); |
416 | ||
21ccc0cf QY |
417 | /* Start Zebra API server */ |
418 | zserv_start(zserv_path); | |
97be79f9 | 419 | |
d62a17ae | 420 | /* Init label manager */ |
421 | label_manager_init(lblmgr_path); | |
fea12efb | 422 | |
453844ab QY |
423 | /* RNH init */ |
424 | zebra_rnh_init(); | |
89272910 | 425 | |
5ad4c39c QY |
426 | /* Error init */ |
427 | zebra_error_init(); | |
453844ab | 428 | |
2875801f | 429 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 SW |
430 | if (zapi_fuzzing) { |
431 | zserv_read_file(zapi_fuzzing); | |
432 | exit(0); | |
acfa8927 SW |
433 | } |
434 | #endif /* HANDLE_ZAPI_FUZZING */ | |
435 | #if defined(HANDLE_NETLINK_FUZZING) | |
436 | if (netlink_fuzzing) { | |
81a2f870 | 437 | netlink_read_init(netlink_fuzzing); |
2875801f QY |
438 | exit(0); |
439 | } | |
acfa8927 | 440 | #endif /* HANDLE_NETLINK_FUZZING */ |
2875801f QY |
441 | |
442 | ||
d62a17ae | 443 | frr_run(zebrad.master); |
718e3744 | 444 | |
d62a17ae | 445 | /* Not reached... */ |
446 | return 0; | |
718e3744 | 447 | } |