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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" |
718e3744 | 30 | #include "prefix.h" |
31 | #include "log.h" | |
7514fb77 | 32 | #include "plist.h" |
edd7c245 | 33 | #include "privs.h" |
2d75d052 | 34 | #include "sigevent.h" |
b72ede27 | 35 | #include "vrf.h" |
4f04a76b | 36 | #include "libfrr.h" |
bf094f69 | 37 | #include "routemap.h" |
718e3744 | 38 | |
89272910 | 39 | #include "zebra/zebra_router.h" |
43e52561 | 40 | #include "zebra/zebra_errors.h" |
718e3744 | 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" |
4c0ec639 | 54 | #include "zebra/zebra_pbr.h" |
27627f9a | 55 | #include "zebra/zebra_vxlan.h" |
a2665e38 | 56 | #include "zebra/zebra_routemap.h" |
244c1cdc | 57 | |
acfa8927 | 58 | #if defined(HANDLE_NETLINK_FUZZING) |
81a2f870 | 59 | #include "zebra/kernel_netlink.h" |
acfa8927 | 60 | #endif /* HANDLE_NETLINK_FUZZING */ |
81a2f870 | 61 | |
244c1cdc | 62 | #define ZEBRA_PTM_SUPPORT |
718e3744 | 63 | |
718e3744 | 64 | /* process id. */ |
718e3744 | 65 | pid_t pid; |
66 | ||
55c72803 | 67 | /* Pacify zclient.o in libfrr, which expects this variable. */ |
87efd646 | 68 | struct thread_master *master; |
69 | ||
718e3744 | 70 | /* Route retain mode flag. */ |
71 | int retain_mode = 0; | |
72 | ||
6baf7bb8 DS |
73 | /* Allow non-quagga entities to delete quagga routes */ |
74 | int allow_delete = 0; | |
75 | ||
d4644d41 DS |
76 | int graceful_restart; |
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. */ |
2b64873d | 87 | const struct option longopts[] = { |
6b093863 DS |
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'}, | |
6b093863 | 93 | {"retain", no_argument, NULL, 'r'}, |
cc6743c2 | 94 | {"vrfdefaultname", required_argument, NULL, 'o'}, |
d4644d41 | 95 | {"graceful_restart", required_argument, NULL, 'K'}, |
c34b6b57 | 96 | #ifdef HAVE_NETLINK |
6b093863 DS |
97 | {"vrfwnetns", no_argument, NULL, 'n'}, |
98 | {"nl-bufsize", required_argument, NULL, 's'}, | |
99 | {"v6-rr-semantics", no_argument, NULL, OPTION_V6_RR_SEMANTICS}, | |
c34b6b57 | 100 | #endif /* HAVE_NETLINK */ |
6b093863 | 101 | {0}}; |
718e3744 | 102 | |
d62a17ae | 103 | zebra_capabilities_t _caps_p[] = { |
9d303b37 | 104 | ZCAP_NET_ADMIN, ZCAP_SYS_ADMIN, ZCAP_NET_RAW, |
edd7c245 | 105 | }; |
106 | ||
107 | /* zebra privileges to run with */ | |
d62a17ae | 108 | struct zebra_privs_t zserv_privs = { |
b2f36157 | 109 | #if defined(FRR_USER) && defined(FRR_GROUP) |
d62a17ae | 110 | .user = FRR_USER, |
111 | .group = FRR_GROUP, | |
edd7c245 | 112 | #endif |
113 | #ifdef VTY_GROUP | |
d62a17ae | 114 | .vty_group = VTY_GROUP, |
edd7c245 | 115 | #endif |
d62a17ae | 116 | .caps_p = _caps_p, |
117 | .cap_num_p = array_size(_caps_p), | |
118 | .cap_num_i = 0}; | |
edd7c245 | 119 | |
718e3744 | 120 | /* SIGHUP handler. */ |
d62a17ae | 121 | static void sighup(void) |
718e3744 | 122 | { |
d62a17ae | 123 | zlog_info("SIGHUP received"); |
718e3744 | 124 | |
d62a17ae | 125 | /* Reload of config file. */ |
126 | ; | |
718e3744 | 127 | } |
128 | ||
129 | /* SIGINT handler. */ | |
d62a17ae | 130 | static void sigint(void) |
718e3744 | 131 | { |
d62a17ae | 132 | struct vrf *vrf; |
133 | struct zebra_vrf *zvrf; | |
f3e33b69 QY |
134 | struct listnode *ln, *nn; |
135 | struct zserv *client; | |
ff2460d5 MS |
136 | static bool sigint_done; |
137 | ||
138 | if (sigint_done) | |
139 | return; | |
140 | ||
141 | sigint_done = true; | |
fe18ee2d | 142 | |
d62a17ae | 143 | zlog_notice("Terminating on signal"); |
718e3744 | 144 | |
2fc69f03 MS |
145 | atomic_store_explicit(&zrouter.in_shutdown, true, |
146 | memory_order_relaxed); | |
147 | ||
d7fc0e67 DS |
148 | /* send RA lifetime of 0 before stopping. rfc4861/6.2.5 */ |
149 | rtadv_stop_ra_all(); | |
150 | ||
03951374 | 151 | frr_early_fini(); |
718e3744 | 152 | |
4dfd7a02 MS |
153 | zebra_dplane_pre_finish(); |
154 | ||
b9e6727a S |
155 | /* Clean up GR related info. */ |
156 | zebra_gr_stale_client_cleanup(zrouter.stale_client_list); | |
157 | list_delete_all_node(zrouter.stale_client_list); | |
158 | ||
161e9ab7 | 159 | for (ALL_LIST_ELEMENTS(zrouter.client_list, ln, nn, client)) |
f3e33b69 QY |
160 | zserv_close_client(client); |
161 | ||
41674562 | 162 | zserv_close(); |
161e9ab7 | 163 | list_delete_all_node(zrouter.client_list); |
41674562 | 164 | |
f88bd20c | 165 | zebra_ptm_finish(); |
d62a17ae | 166 | |
167 | if (retain_mode) | |
a2addae8 | 168 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
d62a17ae | 169 | zvrf = vrf->info; |
170 | if (zvrf) | |
171 | SET_FLAG(zvrf->flags, ZEBRA_VRF_RETAIN); | |
172 | } | |
e2353ec2 DS |
173 | if (zrouter.lsp_process_q) |
174 | work_queue_free_and_null(&zrouter.lsp_process_q); | |
3e0372d2 | 175 | |
d62a17ae | 176 | vrf_terminate(); |
177 | ||
62b8bb7a | 178 | ns_walk_func(zebra_ns_early_shutdown); |
e27dec3c | 179 | zebra_ns_notify_close(); |
d62a17ae | 180 | |
181 | access_list_reset(); | |
182 | prefix_list_reset(); | |
a2665e38 | 183 | /* |
184 | * zebra_routemap_finish will | |
185 | * 1 set rmap upd timer to 0 so that rmap update wont be scheduled again | |
186 | * 2 Put off the rmap update thread | |
187 | * 3 route_map_finish | |
188 | */ | |
189 | zebra_routemap_finish(); | |
03951374 | 190 | |
161e9ab7 | 191 | list_delete(&zrouter.client_list); |
4dfd7a02 | 192 | |
ff2460d5 MS |
193 | /* Indicate that all new dplane work has been enqueued. When that |
194 | * work is complete, the dataplane will enqueue an event | |
195 | * with the 'finalize' function. | |
196 | */ | |
1d11b21f | 197 | zebra_dplane_finish(); |
4dfd7a02 MS |
198 | } |
199 | ||
ff2460d5 MS |
200 | /* |
201 | * Final shutdown step for the zebra main thread. This is run after all | |
202 | * async update processing has completed. | |
203 | */ | |
4dfd7a02 MS |
204 | int zebra_finalize(struct thread *dummy) |
205 | { | |
206 | zlog_info("Zebra final shutdown"); | |
207 | ||
62b8bb7a MS |
208 | /* Final shutdown of ns resources */ |
209 | ns_walk_func(zebra_ns_final_shutdown); | |
210 | ||
4dfd7a02 MS |
211 | /* Stop dplane thread and finish any cleanup */ |
212 | zebra_dplane_shutdown(); | |
1d11b21f | 213 | |
89272910 DS |
214 | zebra_router_terminate(); |
215 | ||
03951374 | 216 | frr_fini(); |
d62a17ae | 217 | exit(0); |
718e3744 | 218 | } |
219 | ||
220 | /* SIGUSR1 handler. */ | |
d62a17ae | 221 | static void sigusr1(void) |
718e3744 | 222 | { |
d62a17ae | 223 | zlog_rotate(); |
718e3744 | 224 | } |
225 | ||
d62a17ae | 226 | struct quagga_signal_t zebra_signals[] = { |
227 | { | |
228 | .signal = SIGHUP, | |
229 | .handler = &sighup, | |
230 | }, | |
231 | { | |
232 | .signal = SIGUSR1, | |
233 | .handler = &sigusr1, | |
234 | }, | |
235 | { | |
236 | .signal = SIGINT, | |
237 | .handler = &sigint, | |
238 | }, | |
239 | { | |
240 | .signal = SIGTERM, | |
241 | .handler = &sigint, | |
242 | }, | |
2d75d052 | 243 | }; |
b72ede27 | 244 | |
0d8c7a26 | 245 | static const struct frr_yang_module_info *const zebra_yang_modules[] = { |
a4bed468 | 246 | &frr_interface_info, |
91835f1f | 247 | &frr_route_map_info, |
8fcdd0d6 RW |
248 | }; |
249 | ||
d62a17ae | 250 | FRR_DAEMON_INFO( |
251 | zebra, ZEBRA, .vty_port = ZEBRA_VTY_PORT, .flags = FRR_NO_ZCLIENT, | |
4f04a76b | 252 | |
d62a17ae | 253 | .proghelp = |
254 | "Daemon which manages kernel routing table management " | |
4f04a76b DL |
255 | "and\nredistribution between different routing protocols.", |
256 | ||
d62a17ae | 257 | .signals = zebra_signals, .n_signals = array_size(zebra_signals), |
4f04a76b | 258 | |
8fcdd0d6 RW |
259 | .privs = &zserv_privs, |
260 | ||
261 | .yang_modules = zebra_yang_modules, | |
262 | .n_yang_modules = array_size(zebra_yang_modules), ) | |
4f04a76b | 263 | |
718e3744 | 264 | /* Main startup routine. */ |
d62a17ae | 265 | int main(int argc, char **argv) |
718e3744 | 266 | { |
d62a17ae | 267 | // int batch_mode = 0; |
268 | char *zserv_path = NULL; | |
53af0706 | 269 | char *vrf_default_name_configured = NULL; |
689f5a8c DL |
270 | struct sockaddr_storage dummy; |
271 | socklen_t dummylen; | |
411314ed | 272 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 | 273 | char *zapi_fuzzing = NULL; |
acfa8927 SW |
274 | #endif /* HANDLE_ZAPI_FUZZING */ |
275 | #if defined(HANDLE_NETLINK_FUZZING) | |
81a2f870 | 276 | char *netlink_fuzzing = NULL; |
acfa8927 | 277 | #endif /* HANDLE_NETLINK_FUZZING */ |
fea12efb | 278 | |
d4644d41 | 279 | graceful_restart = 0; |
78dd30b2 PG |
280 | vrf_configure_backend(VRF_BACKEND_VRF_LITE); |
281 | ||
d62a17ae | 282 | frr_preinit(&zebra_di, argc, argv); |
718e3744 | 283 | |
d62a17ae | 284 | frr_opt_add( |
e11d7c96 | 285 | "baz:e:o:rK:" |
4f04a76b | 286 | #ifdef HAVE_NETLINK |
78dd30b2 | 287 | "s:n" |
411314ed DS |
288 | #endif |
289 | #if defined(HANDLE_ZAPI_FUZZING) | |
acfa8927 SW |
290 | "c:" |
291 | #endif /* HANDLE_ZAPI_FUZZING */ | |
292 | #if defined(HANDLE_NETLINK_FUZZING) | |
293 | "w:" | |
294 | #endif /* HANDLE_NETLINK_FUZZING */ | |
d62a17ae | 295 | , |
296 | longopts, | |
d4644d41 DS |
297 | " -b, --batch Runs in batch mode\n" |
298 | " -a, --allow_delete Allow other processes to delete zebra routes\n" | |
299 | " -z, --socket Set path of zebra socket\n" | |
300 | " -e, --ecmp Specify ECMP to use.\n" | |
d4644d41 DS |
301 | " -r, --retain When program terminates, retain added route by zebra.\n" |
302 | " -o, --vrfdefaultname Set default VRF name.\n" | |
303 | " -K, --graceful_restart Graceful restart at the kernel level, timer in seconds for expiration\n" | |
4f04a76b | 304 | #ifdef HAVE_NETLINK |
d4644d41 DS |
305 | " -n, --vrfwnetns Use NetNS as VRF backend\n" |
306 | " -s, --nl-bufsize Set netlink receive buffer size\n" | |
307 | " --v6-rr-semantics Use v6 RR semantics\n" | |
4f04a76b | 308 | #endif /* HAVE_NETLINK */ |
411314ed | 309 | #if defined(HANDLE_ZAPI_FUZZING) |
d4644d41 | 310 | " -c <file> Bypass normal startup and use this file for testing of zapi\n" |
acfa8927 SW |
311 | #endif /* HANDLE_ZAPI_FUZZING */ |
312 | #if defined(HANDLE_NETLINK_FUZZING) | |
d4644d41 | 313 | " -w <file> Bypass normal startup and use this file for testing of netlink input\n" |
acfa8927 | 314 | #endif /* HANDLE_NETLINK_FUZZING */ |
6b093863 | 315 | ); |
d62a17ae | 316 | |
317 | while (1) { | |
318 | int opt = frr_getopt(argc, argv, NULL); | |
319 | ||
320 | if (opt == EOF) | |
321 | break; | |
322 | ||
323 | switch (opt) { | |
324 | case 0: | |
325 | break; | |
326 | case 'b': | |
327 | // batch_mode = 1; | |
328 | break; | |
329 | case 'a': | |
330 | allow_delete = 1; | |
331 | break; | |
d62a17ae | 332 | case 'e': |
b3f2b590 DS |
333 | zrouter.multipath_num = atoi(optarg); |
334 | if (zrouter.multipath_num > MULTIPATH_NUM | |
335 | || zrouter.multipath_num <= 0) { | |
af4c2728 | 336 | flog_err( |
e914ccbe | 337 | EC_ZEBRA_BAD_MULTIPATH_NUM, |
d62a17ae | 338 | "Multipath Number specified must be less than %d and greater than 0", |
339 | MULTIPATH_NUM); | |
340 | return 1; | |
341 | } | |
342 | break; | |
cc6743c2 | 343 | case 'o': |
53af0706 | 344 | vrf_default_name_configured = optarg; |
cc6743c2 | 345 | break; |
d62a17ae | 346 | case 'z': |
347 | zserv_path = optarg; | |
689f5a8c DL |
348 | if (!frr_zclient_addr(&dummy, &dummylen, optarg)) { |
349 | fprintf(stderr, | |
350 | "Invalid zserv socket path: %s\n", | |
351 | optarg); | |
352 | exit(1); | |
353 | } | |
d62a17ae | 354 | break; |
d62a17ae | 355 | case 'r': |
356 | retain_mode = 1; | |
357 | break; | |
d4644d41 | 358 | case 'K': |
d4644d41 DS |
359 | graceful_restart = atoi(optarg); |
360 | break; | |
c34b6b57 | 361 | #ifdef HAVE_NETLINK |
d62a17ae | 362 | case 's': |
363 | nl_rcvbufsize = atoi(optarg); | |
364 | break; | |
78dd30b2 PG |
365 | case 'n': |
366 | vrf_configure_backend(VRF_BACKEND_NETNS); | |
367 | break; | |
6b093863 DS |
368 | case OPTION_V6_RR_SEMANTICS: |
369 | v6_rr_semantics = true; | |
370 | break; | |
c34b6b57 | 371 | #endif /* HAVE_NETLINK */ |
411314ed DS |
372 | #if defined(HANDLE_ZAPI_FUZZING) |
373 | case 'c': | |
81a2f870 | 374 | zapi_fuzzing = optarg; |
81a2f870 | 375 | break; |
acfa8927 SW |
376 | #endif /* HANDLE_ZAPI_FUZZING */ |
377 | #if defined(HANDLE_NETLINK_FUZZING) | |
81a2f870 SW |
378 | case 'w': |
379 | netlink_fuzzing = optarg; | |
380 | /* This ensures we are aren't writing any of the | |
381 | * startup netlink messages that happen when we | |
382 | * just want to read. | |
383 | */ | |
acfa8927 | 384 | netlink_read = true; |
411314ed | 385 | break; |
acfa8927 | 386 | #endif /* HANDLE_NETLINK_FUZZING */ |
d62a17ae | 387 | default: |
388 | frr_help_exit(1); | |
389 | break; | |
390 | } | |
718e3744 | 391 | } |
d62a17ae | 392 | |
3801e764 | 393 | zrouter.master = frr_init(); |
d62a17ae | 394 | |
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 | */ | |
d4644d41 | 443 | zrouter.startup_time = monotime(NULL); |
33656d2d DS |
444 | thread_add_timer(zrouter.master, rib_sweep_route, |
445 | NULL, graceful_restart, NULL); | |
91b7351d | 446 | |
d62a17ae | 447 | /* Needed for BSD routing socket. */ |
448 | pid = getpid(); | |
718e3744 | 449 | |
e5a60d82 MS |
450 | /* Start dataplane system */ |
451 | zebra_dplane_start(); | |
452 | ||
21ccc0cf QY |
453 | /* Start Zebra API server */ |
454 | zserv_start(zserv_path); | |
97be79f9 | 455 | |
d62a17ae | 456 | /* Init label manager */ |
e11d7c96 | 457 | label_manager_init(); |
fea12efb | 458 | |
453844ab QY |
459 | /* RNH init */ |
460 | zebra_rnh_init(); | |
89272910 | 461 | |
27627f9a KA |
462 | /* Config handler Init */ |
463 | zebra_evpn_init(); | |
464 | ||
5ad4c39c QY |
465 | /* Error init */ |
466 | zebra_error_init(); | |
453844ab | 467 | |
2875801f | 468 | #if defined(HANDLE_ZAPI_FUZZING) |
81a2f870 SW |
469 | if (zapi_fuzzing) { |
470 | zserv_read_file(zapi_fuzzing); | |
471 | exit(0); | |
acfa8927 SW |
472 | } |
473 | #endif /* HANDLE_ZAPI_FUZZING */ | |
474 | #if defined(HANDLE_NETLINK_FUZZING) | |
475 | if (netlink_fuzzing) { | |
81a2f870 | 476 | netlink_read_init(netlink_fuzzing); |
2875801f QY |
477 | exit(0); |
478 | } | |
acfa8927 | 479 | #endif /* HANDLE_NETLINK_FUZZING */ |
2875801f QY |
480 | |
481 | ||
3801e764 | 482 | frr_run(zrouter.master); |
718e3744 | 483 | |
d62a17ae | 484 | /* Not reached... */ |
485 | return 0; | |
718e3744 | 486 | } |