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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" |
718e3744 | 40 | |
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" |
244c1cdc DS |
54 | |
55 | #define ZEBRA_PTM_SUPPORT | |
718e3744 | 56 | |
b21b19c5 | 57 | /* Zebra instance */ |
d62a17ae | 58 | struct zebra_t zebrad = { |
59 | .rtm_table_default = 0, | |
a37ef435 | 60 | .packets_to_process = ZEBRA_ZAPI_PACKETS_TO_PROCESS, |
b21b19c5 | 61 | }; |
718e3744 | 62 | |
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 | ||
718e3744 | 75 | /* Don't delete kernel route. */ |
76 | int keep_kernel_mode = 0; | |
77 | ||
6b093863 DS |
78 | bool v6_rr_semantics = false; |
79 | ||
c34b6b57 | 80 | #ifdef HAVE_NETLINK |
81 | /* Receive buffer size for netlink socket */ | |
d7c0a89a | 82 | uint32_t nl_rcvbufsize = 4194304; |
c34b6b57 | 83 | #endif /* HAVE_NETLINK */ |
84 | ||
6b093863 | 85 | #define OPTION_V6_RR_SEMANTICS 2000 |
718e3744 | 86 | /* Command line options. */ |
6b093863 DS |
87 | struct option longopts[] = { |
88 | {"batch", no_argument, NULL, 'b'}, | |
89 | {"allow_delete", no_argument, NULL, 'a'}, | |
90 | {"keep_kernel", no_argument, NULL, 'k'}, | |
91 | {"socket", required_argument, NULL, 'z'}, | |
92 | {"ecmp", required_argument, NULL, 'e'}, | |
93 | {"label_socket", no_argument, NULL, 'l'}, | |
94 | {"retain", no_argument, NULL, 'r'}, | |
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 | |
37fe7731 DS |
119 | unsigned int multipath_num = MULTIPATH_NUM; |
120 | ||
718e3744 | 121 | /* SIGHUP handler. */ |
d62a17ae | 122 | static void sighup(void) |
718e3744 | 123 | { |
d62a17ae | 124 | zlog_info("SIGHUP received"); |
718e3744 | 125 | |
d62a17ae | 126 | /* Reload of config file. */ |
127 | ; | |
718e3744 | 128 | } |
129 | ||
130 | /* SIGINT handler. */ | |
d62a17ae | 131 | static void sigint(void) |
718e3744 | 132 | { |
d62a17ae | 133 | struct vrf *vrf; |
134 | struct zebra_vrf *zvrf; | |
fe18ee2d | 135 | |
d62a17ae | 136 | zlog_notice("Terminating on signal"); |
718e3744 | 137 | |
03951374 | 138 | frr_early_fini(); |
718e3744 | 139 | |
d62a17ae | 140 | list_delete_all_node(zebrad.client_list); |
f88bd20c | 141 | zebra_ptm_finish(); |
d62a17ae | 142 | |
143 | if (retain_mode) | |
a2addae8 | 144 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
d62a17ae | 145 | zvrf = vrf->info; |
146 | if (zvrf) | |
147 | SET_FLAG(zvrf->flags, ZEBRA_VRF_RETAIN); | |
148 | } | |
40289934 | 149 | if (zebrad.lsp_process_q) |
e208c8f9 | 150 | work_queue_free_and_null(&zebrad.lsp_process_q); |
d62a17ae | 151 | vrf_terminate(); |
152 | ||
ff705b15 | 153 | ns_walk_func(zebra_ns_disabled); |
e27dec3c | 154 | zebra_ns_notify_close(); |
d62a17ae | 155 | |
156 | access_list_reset(); | |
157 | prefix_list_reset(); | |
158 | route_map_finish(); | |
03951374 | 159 | |
affe9e99 | 160 | list_delete_and_null(&zebrad.client_list); |
e208c8f9 | 161 | work_queue_free_and_null(&zebrad.ribq); |
d62a17ae | 162 | meta_queue_free(zebrad.mq); |
d62a17ae | 163 | |
03951374 | 164 | frr_fini(); |
d62a17ae | 165 | exit(0); |
718e3744 | 166 | } |
167 | ||
168 | /* SIGUSR1 handler. */ | |
d62a17ae | 169 | static void sigusr1(void) |
718e3744 | 170 | { |
d62a17ae | 171 | zlog_rotate(); |
718e3744 | 172 | } |
173 | ||
d62a17ae | 174 | struct quagga_signal_t zebra_signals[] = { |
175 | { | |
176 | .signal = SIGHUP, | |
177 | .handler = &sighup, | |
178 | }, | |
179 | { | |
180 | .signal = SIGUSR1, | |
181 | .handler = &sigusr1, | |
182 | }, | |
183 | { | |
184 | .signal = SIGINT, | |
185 | .handler = &sigint, | |
186 | }, | |
187 | { | |
188 | .signal = SIGTERM, | |
189 | .handler = &sigint, | |
190 | }, | |
2d75d052 | 191 | }; |
b72ede27 | 192 | |
d62a17ae | 193 | FRR_DAEMON_INFO( |
194 | zebra, ZEBRA, .vty_port = ZEBRA_VTY_PORT, .flags = FRR_NO_ZCLIENT, | |
4f04a76b | 195 | |
d62a17ae | 196 | .proghelp = |
197 | "Daemon which manages kernel routing table management " | |
4f04a76b DL |
198 | "and\nredistribution between different routing protocols.", |
199 | ||
d62a17ae | 200 | .signals = zebra_signals, .n_signals = array_size(zebra_signals), |
4f04a76b | 201 | |
d62a17ae | 202 | .privs = &zserv_privs, ) |
4f04a76b | 203 | |
718e3744 | 204 | /* Main startup routine. */ |
d62a17ae | 205 | int main(int argc, char **argv) |
718e3744 | 206 | { |
d62a17ae | 207 | // int batch_mode = 0; |
208 | char *zserv_path = NULL; | |
209 | /* Socket to external label manager */ | |
210 | char *lblmgr_path = NULL; | |
689f5a8c DL |
211 | struct sockaddr_storage dummy; |
212 | socklen_t dummylen; | |
411314ed DS |
213 | #if defined(HANDLE_ZAPI_FUZZING) |
214 | char *fuzzing = NULL; | |
215 | #endif | |
fea12efb | 216 | |
78dd30b2 | 217 | vrf_configure_backend(VRF_BACKEND_VRF_LITE); |
996c9314 | 218 | logicalrouter_configure_backend(LOGICALROUTER_BACKEND_NETNS); |
78dd30b2 | 219 | |
d62a17ae | 220 | frr_preinit(&zebra_di, argc, argv); |
718e3744 | 221 | |
d62a17ae | 222 | frr_opt_add( |
223 | "bakz:e:l:r" | |
4f04a76b | 224 | #ifdef HAVE_NETLINK |
78dd30b2 | 225 | "s:n" |
411314ed DS |
226 | #endif |
227 | #if defined(HANDLE_ZAPI_FUZZING) | |
228 | "c:" | |
c05795b1 | 229 | #endif |
d62a17ae | 230 | , |
231 | longopts, | |
6b093863 DS |
232 | " -b, --batch Runs in batch mode\n" |
233 | " -a, --allow_delete Allow other processes to delete zebra routes\n" | |
234 | " -z, --socket Set path of zebra socket\n" | |
235 | " -e, --ecmp Specify ECMP to use.\n" | |
236 | " -l, --label_socket Socket to external label manager\n" | |
237 | " -k, --keep_kernel Don't delete old routes which installed by zebra.\n" | |
238 | " -r, --retain When program terminates, retain added route by zebra.\n" | |
4f04a76b | 239 | #ifdef HAVE_NETLINK |
6b093863 DS |
240 | " -n, --vrfwnetns Set VRF with NetNS\n" |
241 | " -s, --nl-bufsize Set netlink receive buffer size\n" | |
242 | " --v6-rr-semantics Use v6 RR semantics\n" | |
4f04a76b | 243 | #endif /* HAVE_NETLINK */ |
411314ed | 244 | #if defined(HANDLE_ZAPI_FUZZING) |
6b093863 | 245 | " -c <file> Bypass normal startup use this file for tetsting of zapi" |
411314ed | 246 | #endif |
6b093863 | 247 | ); |
d62a17ae | 248 | |
249 | while (1) { | |
250 | int opt = frr_getopt(argc, argv, NULL); | |
251 | ||
252 | if (opt == EOF) | |
253 | break; | |
254 | ||
255 | switch (opt) { | |
256 | case 0: | |
257 | break; | |
258 | case 'b': | |
259 | // batch_mode = 1; | |
260 | break; | |
261 | case 'a': | |
262 | allow_delete = 1; | |
263 | break; | |
264 | case 'k': | |
265 | keep_kernel_mode = 1; | |
266 | break; | |
267 | case 'e': | |
268 | multipath_num = atoi(optarg); | |
269 | if (multipath_num > MULTIPATH_NUM | |
270 | || multipath_num <= 0) { | |
271 | zlog_err( | |
272 | "Multipath Number specified must be less than %d and greater than 0", | |
273 | MULTIPATH_NUM); | |
274 | return 1; | |
275 | } | |
276 | break; | |
277 | case 'z': | |
278 | zserv_path = optarg; | |
689f5a8c DL |
279 | if (!frr_zclient_addr(&dummy, &dummylen, optarg)) { |
280 | fprintf(stderr, | |
281 | "Invalid zserv socket path: %s\n", | |
282 | optarg); | |
283 | exit(1); | |
284 | } | |
d62a17ae | 285 | break; |
286 | case 'l': | |
287 | lblmgr_path = optarg; | |
288 | break; | |
289 | case 'r': | |
290 | retain_mode = 1; | |
291 | break; | |
c34b6b57 | 292 | #ifdef HAVE_NETLINK |
d62a17ae | 293 | case 's': |
294 | nl_rcvbufsize = atoi(optarg); | |
295 | break; | |
78dd30b2 PG |
296 | case 'n': |
297 | vrf_configure_backend(VRF_BACKEND_NETNS); | |
736d41ad | 298 | logicalrouter_configure_backend( |
996c9314 | 299 | LOGICALROUTER_BACKEND_OFF); |
78dd30b2 | 300 | break; |
6b093863 DS |
301 | case OPTION_V6_RR_SEMANTICS: |
302 | v6_rr_semantics = true; | |
303 | break; | |
c34b6b57 | 304 | #endif /* HAVE_NETLINK */ |
411314ed DS |
305 | #if defined(HANDLE_ZAPI_FUZZING) |
306 | case 'c': | |
307 | fuzzing = optarg; | |
308 | break; | |
309 | #endif | |
d62a17ae | 310 | default: |
311 | frr_help_exit(1); | |
312 | break; | |
313 | } | |
718e3744 | 314 | } |
d62a17ae | 315 | |
316 | vty_config_lockless(); | |
317 | zebrad.master = frr_init(); | |
318 | ||
319 | /* Zebra related initialize. */ | |
5f145fb8 | 320 | zserv_init(); |
d62a17ae | 321 | rib_init(); |
322 | zebra_if_init(); | |
323 | zebra_debug_init(); | |
324 | router_id_cmd_init(); | |
f84fc2c9 DS |
325 | |
326 | /* | |
327 | * Initialize NS( and implicitly the VRF module), and make kernel | |
328 | * routing socket. */ | |
329 | zebra_ns_init(); | |
330 | ||
331 | zebra_vty_init(); | |
d62a17ae | 332 | access_list_init(); |
333 | prefix_list_init(); | |
334 | #if defined(HAVE_RTADV) | |
335 | rtadv_cmd_init(); | |
36735ed9 | 336 | #endif |
d62a17ae | 337 | /* PTM socket */ |
244c1cdc | 338 | #ifdef ZEBRA_PTM_SUPPORT |
d62a17ae | 339 | zebra_ptm_init(); |
244c1cdc | 340 | #endif |
718e3744 | 341 | |
d62a17ae | 342 | zebra_mpls_init(); |
343 | zebra_mpls_vty_init(); | |
2dd0d726 | 344 | zebra_pw_vty_init(); |
7758e3f3 | 345 | |
996c9314 LB |
346 | /* For debug purpose. */ |
347 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
718e3744 | 348 | |
411314ed DS |
349 | #if defined(HANDLE_ZAPI_FUZZING) |
350 | if (fuzzing) { | |
351 | zserv_read_file(fuzzing); | |
352 | exit(0); | |
353 | } | |
354 | #endif | |
355 | ||
d62a17ae | 356 | /* Process the configuration file. Among other configuration |
9d303b37 DL |
357 | * directives we can meet those installing static routes. Such |
358 | * requests will not be executed immediately, but queued in | |
359 | * zebra->ribq structure until we enter the main execution loop. | |
360 | * The notifications from kernel will show originating PID equal | |
361 | * to that after daemon() completes (if ever called). | |
362 | */ | |
d62a17ae | 363 | frr_config_fork(); |
718e3744 | 364 | |
d62a17ae | 365 | /* After we have successfully acquired the pidfile, we can be sure |
9d303b37 DL |
366 | * about being the only copy of zebra process, which is submitting |
367 | * changes to the FIB. | |
368 | * Clean up zebra-originated routes. The requests will be sent to OS | |
369 | * immediately, so originating PID in notifications from kernel | |
370 | * will be equal to the current getpid(). To know about such routes, | |
371 | * we have to have route_read() called before. | |
372 | */ | |
d62a17ae | 373 | if (!keep_kernel_mode) |
374 | rib_sweep_route(); | |
91b7351d | 375 | |
d62a17ae | 376 | /* Needed for BSD routing socket. */ |
377 | pid = getpid(); | |
718e3744 | 378 | |
d62a17ae | 379 | /* This must be done only after locking pidfile (bug #403). */ |
380 | zebra_zserv_socket_init(zserv_path); | |
97be79f9 | 381 | |
d62a17ae | 382 | /* Init label manager */ |
383 | label_manager_init(lblmgr_path); | |
fea12efb | 384 | |
453844ab QY |
385 | /* RNH init */ |
386 | zebra_rnh_init(); | |
387 | ||
d62a17ae | 388 | frr_run(zebrad.master); |
718e3744 | 389 | |
d62a17ae | 390 | /* Not reached... */ |
391 | return 0; | |
718e3744 | 392 | } |