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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 | |
42 | #include "zebra/rib.h" | |
43 | #include "zebra/zserv.h" | |
44 | #include "zebra/debug.h" | |
18a6dce6 | 45 | #include "zebra/router-id.h" |
ca776988 | 46 | #include "zebra/irdp.h" |
a1ac18c4 | 47 | #include "zebra/rtadv.h" |
244c1cdc | 48 | #include "zebra/zebra_ptm.h" |
fe18ee2d | 49 | #include "zebra/zebra_ns.h" |
e2b1be64 | 50 | #include "zebra/redistribute.h" |
7758e3f3 | 51 | #include "zebra/zebra_mpls.h" |
fea12efb | 52 | #include "zebra/label_manager.h" |
e27dec3c | 53 | #include "zebra/zebra_netns_notify.h" |
453844ab | 54 | #include "zebra/zebra_rnh.h" |
4c0ec639 | 55 | #include "zebra/zebra_pbr.h" |
244c1cdc DS |
56 | |
57 | #define ZEBRA_PTM_SUPPORT | |
718e3744 | 58 | |
b21b19c5 | 59 | /* Zebra instance */ |
d62a17ae | 60 | struct zebra_t zebrad = { |
61 | .rtm_table_default = 0, | |
a37ef435 | 62 | .packets_to_process = ZEBRA_ZAPI_PACKETS_TO_PROCESS, |
b21b19c5 | 63 | }; |
718e3744 | 64 | |
65 | /* process id. */ | |
718e3744 | 66 | pid_t pid; |
67 | ||
55c72803 | 68 | /* Pacify zclient.o in libfrr, which expects this variable. */ |
87efd646 | 69 | struct thread_master *master; |
70 | ||
718e3744 | 71 | /* Route retain mode flag. */ |
72 | int retain_mode = 0; | |
73 | ||
6baf7bb8 DS |
74 | /* Allow non-quagga entities to delete quagga routes */ |
75 | int allow_delete = 0; | |
76 | ||
718e3744 | 77 | /* Don't delete kernel route. */ |
78 | int keep_kernel_mode = 0; | |
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'}, | |
c34b6b57 | 97 | #ifdef HAVE_NETLINK |
6b093863 DS |
98 | {"vrfwnetns", no_argument, NULL, 'n'}, |
99 | {"nl-bufsize", required_argument, NULL, 's'}, | |
100 | {"v6-rr-semantics", no_argument, NULL, OPTION_V6_RR_SEMANTICS}, | |
c34b6b57 | 101 | #endif /* HAVE_NETLINK */ |
6b093863 | 102 | {0}}; |
718e3744 | 103 | |
d62a17ae | 104 | zebra_capabilities_t _caps_p[] = { |
9d303b37 | 105 | ZCAP_NET_ADMIN, ZCAP_SYS_ADMIN, ZCAP_NET_RAW, |
edd7c245 | 106 | }; |
107 | ||
108 | /* zebra privileges to run with */ | |
d62a17ae | 109 | struct zebra_privs_t zserv_privs = { |
b2f36157 | 110 | #if defined(FRR_USER) && defined(FRR_GROUP) |
d62a17ae | 111 | .user = FRR_USER, |
112 | .group = FRR_GROUP, | |
edd7c245 | 113 | #endif |
114 | #ifdef VTY_GROUP | |
d62a17ae | 115 | .vty_group = VTY_GROUP, |
edd7c245 | 116 | #endif |
d62a17ae | 117 | .caps_p = _caps_p, |
118 | .cap_num_p = array_size(_caps_p), | |
119 | .cap_num_i = 0}; | |
edd7c245 | 120 | |
37fe7731 DS |
121 | unsigned int multipath_num = MULTIPATH_NUM; |
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; | |
fe18ee2d | 137 | |
d62a17ae | 138 | zlog_notice("Terminating on signal"); |
718e3744 | 139 | |
03951374 | 140 | frr_early_fini(); |
718e3744 | 141 | |
d62a17ae | 142 | list_delete_all_node(zebrad.client_list); |
f88bd20c | 143 | zebra_ptm_finish(); |
d62a17ae | 144 | |
145 | if (retain_mode) | |
a2addae8 | 146 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
d62a17ae | 147 | zvrf = vrf->info; |
148 | if (zvrf) | |
149 | SET_FLAG(zvrf->flags, ZEBRA_VRF_RETAIN); | |
150 | } | |
40289934 | 151 | if (zebrad.lsp_process_q) |
e208c8f9 | 152 | work_queue_free_and_null(&zebrad.lsp_process_q); |
d62a17ae | 153 | vrf_terminate(); |
154 | ||
ff705b15 | 155 | ns_walk_func(zebra_ns_disabled); |
e27dec3c | 156 | zebra_ns_notify_close(); |
d62a17ae | 157 | |
158 | access_list_reset(); | |
159 | prefix_list_reset(); | |
160 | route_map_finish(); | |
03951374 | 161 | |
affe9e99 | 162 | list_delete_and_null(&zebrad.client_list); |
e208c8f9 | 163 | work_queue_free_and_null(&zebrad.ribq); |
d62a17ae | 164 | meta_queue_free(zebrad.mq); |
d62a17ae | 165 | |
03951374 | 166 | frr_fini(); |
d62a17ae | 167 | exit(0); |
718e3744 | 168 | } |
169 | ||
170 | /* SIGUSR1 handler. */ | |
d62a17ae | 171 | static void sigusr1(void) |
718e3744 | 172 | { |
d62a17ae | 173 | zlog_rotate(); |
718e3744 | 174 | } |
175 | ||
d62a17ae | 176 | struct quagga_signal_t zebra_signals[] = { |
177 | { | |
178 | .signal = SIGHUP, | |
179 | .handler = &sighup, | |
180 | }, | |
181 | { | |
182 | .signal = SIGUSR1, | |
183 | .handler = &sigusr1, | |
184 | }, | |
185 | { | |
186 | .signal = SIGINT, | |
187 | .handler = &sigint, | |
188 | }, | |
189 | { | |
190 | .signal = SIGTERM, | |
191 | .handler = &sigint, | |
192 | }, | |
2d75d052 | 193 | }; |
b72ede27 | 194 | |
d62a17ae | 195 | FRR_DAEMON_INFO( |
196 | zebra, ZEBRA, .vty_port = ZEBRA_VTY_PORT, .flags = FRR_NO_ZCLIENT, | |
4f04a76b | 197 | |
d62a17ae | 198 | .proghelp = |
199 | "Daemon which manages kernel routing table management " | |
4f04a76b DL |
200 | "and\nredistribution between different routing protocols.", |
201 | ||
d62a17ae | 202 | .signals = zebra_signals, .n_signals = array_size(zebra_signals), |
4f04a76b | 203 | |
d62a17ae | 204 | .privs = &zserv_privs, ) |
4f04a76b | 205 | |
718e3744 | 206 | /* Main startup routine. */ |
d62a17ae | 207 | int main(int argc, char **argv) |
718e3744 | 208 | { |
d62a17ae | 209 | // int batch_mode = 0; |
210 | char *zserv_path = NULL; | |
211 | /* Socket to external label manager */ | |
212 | char *lblmgr_path = NULL; | |
689f5a8c DL |
213 | struct sockaddr_storage dummy; |
214 | socklen_t dummylen; | |
411314ed DS |
215 | #if defined(HANDLE_ZAPI_FUZZING) |
216 | char *fuzzing = NULL; | |
217 | #endif | |
fea12efb | 218 | |
78dd30b2 | 219 | vrf_configure_backend(VRF_BACKEND_VRF_LITE); |
996c9314 | 220 | logicalrouter_configure_backend(LOGICALROUTER_BACKEND_NETNS); |
78dd30b2 | 221 | |
d62a17ae | 222 | frr_preinit(&zebra_di, argc, argv); |
718e3744 | 223 | |
d62a17ae | 224 | frr_opt_add( |
225 | "bakz:e:l:r" | |
4f04a76b | 226 | #ifdef HAVE_NETLINK |
78dd30b2 | 227 | "s:n" |
411314ed DS |
228 | #endif |
229 | #if defined(HANDLE_ZAPI_FUZZING) | |
230 | "c:" | |
c05795b1 | 231 | #endif |
d62a17ae | 232 | , |
233 | longopts, | |
6b093863 DS |
234 | " -b, --batch Runs in batch mode\n" |
235 | " -a, --allow_delete Allow other processes to delete zebra routes\n" | |
236 | " -z, --socket Set path of zebra socket\n" | |
237 | " -e, --ecmp Specify ECMP to use.\n" | |
238 | " -l, --label_socket Socket to external label manager\n" | |
f6b66ba9 | 239 | " -k, --keep_kernel Don't delete old routes which were installed by zebra.\n" |
6b093863 | 240 | " -r, --retain When program terminates, retain added route by zebra.\n" |
4f04a76b | 241 | #ifdef HAVE_NETLINK |
f6b66ba9 | 242 | " -n, --vrfwnetns Use NetNS as VRF backend\n" |
6b093863 DS |
243 | " -s, --nl-bufsize Set netlink receive buffer size\n" |
244 | " --v6-rr-semantics Use v6 RR semantics\n" | |
4f04a76b | 245 | #endif /* HAVE_NETLINK */ |
411314ed | 246 | #if defined(HANDLE_ZAPI_FUZZING) |
f6b66ba9 | 247 | " -c <file> Bypass normal startup and use this file for testing of zapi" |
411314ed | 248 | #endif |
6b093863 | 249 | ); |
d62a17ae | 250 | |
251 | while (1) { | |
252 | int opt = frr_getopt(argc, argv, NULL); | |
253 | ||
254 | if (opt == EOF) | |
255 | break; | |
256 | ||
257 | switch (opt) { | |
258 | case 0: | |
259 | break; | |
260 | case 'b': | |
261 | // batch_mode = 1; | |
262 | break; | |
263 | case 'a': | |
264 | allow_delete = 1; | |
265 | break; | |
266 | case 'k': | |
267 | keep_kernel_mode = 1; | |
268 | break; | |
269 | case 'e': | |
270 | multipath_num = atoi(optarg); | |
271 | if (multipath_num > MULTIPATH_NUM | |
272 | || multipath_num <= 0) { | |
273 | zlog_err( | |
274 | "Multipath Number specified must be less than %d and greater than 0", | |
275 | MULTIPATH_NUM); | |
276 | return 1; | |
277 | } | |
278 | break; | |
279 | case 'z': | |
280 | zserv_path = optarg; | |
689f5a8c DL |
281 | if (!frr_zclient_addr(&dummy, &dummylen, optarg)) { |
282 | fprintf(stderr, | |
283 | "Invalid zserv socket path: %s\n", | |
284 | optarg); | |
285 | exit(1); | |
286 | } | |
d62a17ae | 287 | break; |
288 | case 'l': | |
289 | lblmgr_path = optarg; | |
290 | break; | |
291 | case 'r': | |
292 | retain_mode = 1; | |
293 | break; | |
c34b6b57 | 294 | #ifdef HAVE_NETLINK |
d62a17ae | 295 | case 's': |
296 | nl_rcvbufsize = atoi(optarg); | |
297 | break; | |
78dd30b2 PG |
298 | case 'n': |
299 | vrf_configure_backend(VRF_BACKEND_NETNS); | |
736d41ad | 300 | logicalrouter_configure_backend( |
996c9314 | 301 | LOGICALROUTER_BACKEND_OFF); |
78dd30b2 | 302 | break; |
6b093863 DS |
303 | case OPTION_V6_RR_SEMANTICS: |
304 | v6_rr_semantics = true; | |
305 | break; | |
c34b6b57 | 306 | #endif /* HAVE_NETLINK */ |
411314ed DS |
307 | #if defined(HANDLE_ZAPI_FUZZING) |
308 | case 'c': | |
309 | fuzzing = optarg; | |
310 | break; | |
311 | #endif | |
d62a17ae | 312 | default: |
313 | frr_help_exit(1); | |
314 | break; | |
315 | } | |
718e3744 | 316 | } |
d62a17ae | 317 | |
318 | vty_config_lockless(); | |
319 | zebrad.master = frr_init(); | |
320 | ||
321 | /* Zebra related initialize. */ | |
5f145fb8 | 322 | zserv_init(); |
d62a17ae | 323 | rib_init(); |
324 | zebra_if_init(); | |
325 | zebra_debug_init(); | |
326 | router_id_cmd_init(); | |
f84fc2c9 DS |
327 | |
328 | /* | |
329 | * Initialize NS( and implicitly the VRF module), and make kernel | |
330 | * routing socket. */ | |
331 | zebra_ns_init(); | |
332 | ||
333 | zebra_vty_init(); | |
d62a17ae | 334 | access_list_init(); |
335 | prefix_list_init(); | |
336 | #if defined(HAVE_RTADV) | |
337 | rtadv_cmd_init(); | |
36735ed9 | 338 | #endif |
d62a17ae | 339 | /* PTM socket */ |
244c1cdc | 340 | #ifdef ZEBRA_PTM_SUPPORT |
d62a17ae | 341 | zebra_ptm_init(); |
244c1cdc | 342 | #endif |
718e3744 | 343 | |
d62a17ae | 344 | zebra_mpls_init(); |
345 | zebra_mpls_vty_init(); | |
2dd0d726 | 346 | zebra_pw_vty_init(); |
4c0ec639 | 347 | zebra_pbr_init(); |
7758e3f3 | 348 | |
996c9314 LB |
349 | /* For debug purpose. */ |
350 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
718e3744 | 351 | |
d62a17ae | 352 | /* Process the configuration file. Among other configuration |
9d303b37 DL |
353 | * directives we can meet those installing static routes. Such |
354 | * requests will not be executed immediately, but queued in | |
355 | * zebra->ribq structure until we enter the main execution loop. | |
356 | * The notifications from kernel will show originating PID equal | |
357 | * to that after daemon() completes (if ever called). | |
358 | */ | |
d62a17ae | 359 | frr_config_fork(); |
718e3744 | 360 | |
d62a17ae | 361 | /* After we have successfully acquired the pidfile, we can be sure |
9d303b37 DL |
362 | * about being the only copy of zebra process, which is submitting |
363 | * changes to the FIB. | |
364 | * Clean up zebra-originated routes. The requests will be sent to OS | |
365 | * immediately, so originating PID in notifications from kernel | |
366 | * will be equal to the current getpid(). To know about such routes, | |
367 | * we have to have route_read() called before. | |
368 | */ | |
d62a17ae | 369 | if (!keep_kernel_mode) |
370 | rib_sweep_route(); | |
91b7351d | 371 | |
d62a17ae | 372 | /* Needed for BSD routing socket. */ |
373 | pid = getpid(); | |
718e3744 | 374 | |
21ccc0cf | 375 | /* Intialize pthread library */ |
329e35da QY |
376 | frr_pthread_init(); |
377 | ||
21ccc0cf QY |
378 | /* Start Zebra API server */ |
379 | zserv_start(zserv_path); | |
97be79f9 | 380 | |
d62a17ae | 381 | /* Init label manager */ |
382 | label_manager_init(lblmgr_path); | |
fea12efb | 383 | |
453844ab QY |
384 | /* RNH init */ |
385 | zebra_rnh_init(); | |
386 | ||
2875801f QY |
387 | #if defined(HANDLE_ZAPI_FUZZING) |
388 | if (fuzzing) { | |
389 | zserv_read_file(fuzzing); | |
390 | exit(0); | |
391 | } | |
392 | #endif | |
393 | ||
394 | ||
d62a17ae | 395 | frr_run(zebrad.master); |
718e3744 | 396 | |
d62a17ae | 397 | /* Not reached... */ |
398 | return 0; | |
718e3744 | 399 | } |