1 /* 2 * util/fptr_wlist.c - function pointer whitelists. 3 * 4 * Copyright (c) 2007, NLnet Labs. All rights reserved. 5 * 6 * This software is open source. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 19 * Neither the name of the NLNET LABS nor the names of its contributors may 20 * be used to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /** 37 * \file 38 * 39 * This file contains functions that check function pointers. 40 * The functions contain a whitelist of known good callback values. 41 * Any other values lead to an error. 42 * 43 * Due to the listing nature, this file violates all the modularization 44 * boundaries in the program. 45 */ 46 #include "config.h" 47 #include "util/fptr_wlist.h" 48 #include "util/mini_event.h" 49 #include "services/outside_network.h" 50 #include "services/mesh.h" 51 #include "services/localzone.h" 52 #include "services/authzone.h" 53 #include "services/cache/infra.h" 54 #include "services/cache/rrset.h" 55 #include "services/view.h" 56 #include "dns64/dns64.h" 57 #include "iterator/iterator.h" 58 #include "iterator/iter_fwd.h" 59 #include "validator/validator.h" 60 #include "validator/val_anchor.h" 61 #include "validator/val_nsec3.h" 62 #include "validator/val_sigcrypt.h" 63 #include "validator/val_kentry.h" 64 #include "validator/val_neg.h" 65 #include "validator/autotrust.h" 66 #include "util/data/msgreply.h" 67 #include "util/data/packed_rrset.h" 68 #include "util/storage/slabhash.h" 69 #include "util/storage/dnstree.h" 70 #include "util/locks.h" 71 #include "libunbound/libworker.h" 72 #include "libunbound/context.h" 73 #include "libunbound/worker.h" 74 #include "util/tube.h" 75 #include "util/config_file.h" 76 #ifdef UB_ON_WINDOWS 77 #include "winrc/win_svc.h" 78 #endif 79 #include "respip/respip.h" 80 81 #ifdef WITH_PYTHONMODULE 82 #include "pythonmod/pythonmod.h" 83 #endif 84 #ifdef USE_CACHEDB 85 #include "cachedb/cachedb.h" 86 #endif 87 #ifdef USE_IPSECMOD 88 #include "ipsecmod/ipsecmod.h" 89 #endif 90 #ifdef CLIENT_SUBNET 91 #include "edns-subnet/subnetmod.h" 92 #endif 93 #ifdef USE_IPSET 94 #include "ipset/ipset.h" 95 #endif 96 97 int 98 fptr_whitelist_comm_point(comm_point_callback_type *fptr) 99 { 100 if(fptr == &worker_handle_request) return 1; 101 else if(fptr == &outnet_udp_cb) return 1; 102 else if(fptr == &outnet_tcp_cb) return 1; 103 else if(fptr == &tube_handle_listen) return 1; 104 else if(fptr == &auth_xfer_probe_udp_callback) return 1; 105 else if(fptr == &auth_xfer_transfer_tcp_callback) return 1; 106 else if(fptr == &auth_xfer_transfer_http_callback) return 1; 107 return 0; 108 } 109 110 int 111 fptr_whitelist_comm_point_raw(comm_point_callback_type *fptr) 112 { 113 if(fptr == &tube_handle_listen) return 1; 114 else if(fptr == &tube_handle_write) return 1; 115 else if(fptr == &remote_accept_callback) return 1; 116 else if(fptr == &remote_control_callback) return 1; 117 return 0; 118 } 119 120 int 121 fptr_whitelist_comm_timer(void (*fptr)(void*)) 122 { 123 if(fptr == &pending_udp_timer_cb) return 1; 124 else if(fptr == &outnet_tcptimer) return 1; 125 else if(fptr == &pending_udp_timer_delay_cb) return 1; 126 else if(fptr == &worker_stat_timer_cb) return 1; 127 else if(fptr == &worker_probe_timer_cb) return 1; 128 #ifdef UB_ON_WINDOWS 129 else if(fptr == &wsvc_cron_cb) return 1; 130 #endif 131 else if(fptr == &auth_xfer_timer) return 1; 132 else if(fptr == &auth_xfer_probe_timer_callback) return 1; 133 else if(fptr == &auth_xfer_transfer_timer_callback) return 1; 134 else if(fptr == &mesh_serve_expired_callback) return 1; 135 return 0; 136 } 137 138 int 139 fptr_whitelist_comm_signal(void (*fptr)(int, void*)) 140 { 141 if(fptr == &worker_sighandler) return 1; 142 return 0; 143 } 144 145 int fptr_whitelist_start_accept(void (*fptr)(void*)) 146 { 147 if(fptr == &worker_start_accept) return 1; 148 return 0; 149 } 150 151 int fptr_whitelist_stop_accept(void (*fptr)(void*)) 152 { 153 if(fptr == &worker_stop_accept) return 1; 154 return 0; 155 } 156 157 int 158 fptr_whitelist_event(void (*fptr)(int, short, void *)) 159 { 160 if(fptr == &comm_point_udp_callback) return 1; 161 else if(fptr == &comm_point_udp_ancil_callback) return 1; 162 else if(fptr == &comm_point_tcp_accept_callback) return 1; 163 else if(fptr == &comm_point_tcp_handle_callback) return 1; 164 else if(fptr == &comm_timer_callback) return 1; 165 else if(fptr == &comm_signal_callback) return 1; 166 else if(fptr == &comm_point_local_handle_callback) return 1; 167 else if(fptr == &comm_point_raw_handle_callback) return 1; 168 else if(fptr == &tube_handle_signal) return 1; 169 else if(fptr == &comm_base_handle_slow_accept) return 1; 170 else if(fptr == &comm_point_http_handle_callback) return 1; 171 #ifdef UB_ON_WINDOWS 172 else if(fptr == &worker_win_stop_cb) return 1; 173 #endif 174 return 0; 175 } 176 177 int 178 fptr_whitelist_pending_udp(comm_point_callback_type *fptr) 179 { 180 if(fptr == &serviced_udp_callback) return 1; 181 else if(fptr == &worker_handle_reply) return 1; 182 else if(fptr == &libworker_handle_reply) return 1; 183 return 0; 184 } 185 186 int 187 fptr_whitelist_pending_tcp(comm_point_callback_type *fptr) 188 { 189 if(fptr == &serviced_tcp_callback) return 1; 190 else if(fptr == &worker_handle_reply) return 1; 191 else if(fptr == &libworker_handle_reply) return 1; 192 return 0; 193 } 194 195 int 196 fptr_whitelist_serviced_query(comm_point_callback_type *fptr) 197 { 198 if(fptr == &worker_handle_service_reply) return 1; 199 else if(fptr == &libworker_handle_service_reply) return 1; 200 return 0; 201 } 202 203 int 204 fptr_whitelist_rbtree_cmp(int (*fptr) (const void *, const void *)) 205 { 206 if(fptr == &mesh_state_compare) return 1; 207 else if(fptr == &mesh_state_ref_compare) return 1; 208 else if(fptr == &addr_tree_compare) return 1; 209 else if(fptr == &local_zone_cmp) return 1; 210 else if(fptr == &local_data_cmp) return 1; 211 else if(fptr == &fwd_cmp) return 1; 212 else if(fptr == &pending_cmp) return 1; 213 else if(fptr == &serviced_cmp) return 1; 214 else if(fptr == &name_tree_compare) return 1; 215 else if(fptr == &order_lock_cmp) return 1; 216 else if(fptr == &codeline_cmp) return 1; 217 else if(fptr == &nsec3_hash_cmp) return 1; 218 else if(fptr == &mini_ev_cmp) return 1; 219 else if(fptr == &anchor_cmp) return 1; 220 else if(fptr == &canonical_tree_compare) return 1; 221 else if(fptr == &context_query_cmp) return 1; 222 else if(fptr == &val_neg_data_compare) return 1; 223 else if(fptr == &val_neg_zone_compare) return 1; 224 else if(fptr == &probetree_cmp) return 1; 225 else if(fptr == &replay_var_compare) return 1; 226 else if(fptr == &view_cmp) return 1; 227 else if(fptr == &auth_zone_cmp) return 1; 228 else if(fptr == &auth_data_cmp) return 1; 229 else if(fptr == &auth_xfer_cmp) return 1; 230 return 0; 231 } 232 233 int 234 fptr_whitelist_hash_sizefunc(lruhash_sizefunc_type fptr) 235 { 236 if(fptr == &msgreply_sizefunc) return 1; 237 else if(fptr == &ub_rrset_sizefunc) return 1; 238 else if(fptr == &infra_sizefunc) return 1; 239 else if(fptr == &key_entry_sizefunc) return 1; 240 else if(fptr == &rate_sizefunc) return 1; 241 else if(fptr == &ip_rate_sizefunc) return 1; 242 else if(fptr == &test_slabhash_sizefunc) return 1; 243 #ifdef CLIENT_SUBNET 244 else if(fptr == &msg_cache_sizefunc) return 1; 245 #endif 246 #ifdef USE_DNSCRYPT 247 else if(fptr == &dnsc_shared_secrets_sizefunc) return 1; 248 else if(fptr == &dnsc_nonces_sizefunc) return 1; 249 #endif 250 return 0; 251 } 252 253 int 254 fptr_whitelist_hash_compfunc(lruhash_compfunc_type fptr) 255 { 256 if(fptr == &query_info_compare) return 1; 257 else if(fptr == &ub_rrset_compare) return 1; 258 else if(fptr == &infra_compfunc) return 1; 259 else if(fptr == &key_entry_compfunc) return 1; 260 else if(fptr == &rate_compfunc) return 1; 261 else if(fptr == &ip_rate_compfunc) return 1; 262 else if(fptr == &test_slabhash_compfunc) return 1; 263 #ifdef USE_DNSCRYPT 264 else if(fptr == &dnsc_shared_secrets_compfunc) return 1; 265 else if(fptr == &dnsc_nonces_compfunc) return 1; 266 #endif 267 return 0; 268 } 269 270 int 271 fptr_whitelist_hash_delkeyfunc(lruhash_delkeyfunc_type fptr) 272 { 273 if(fptr == &query_entry_delete) return 1; 274 else if(fptr == &ub_rrset_key_delete) return 1; 275 else if(fptr == &infra_delkeyfunc) return 1; 276 else if(fptr == &key_entry_delkeyfunc) return 1; 277 else if(fptr == &rate_delkeyfunc) return 1; 278 else if(fptr == &ip_rate_delkeyfunc) return 1; 279 else if(fptr == &test_slabhash_delkey) return 1; 280 #ifdef USE_DNSCRYPT 281 else if(fptr == &dnsc_shared_secrets_delkeyfunc) return 1; 282 else if(fptr == &dnsc_nonces_delkeyfunc) return 1; 283 #endif 284 return 0; 285 } 286 287 int 288 fptr_whitelist_hash_deldatafunc(lruhash_deldatafunc_type fptr) 289 { 290 if(fptr == &reply_info_delete) return 1; 291 else if(fptr == &rrset_data_delete) return 1; 292 else if(fptr == &infra_deldatafunc) return 1; 293 else if(fptr == &key_entry_deldatafunc) return 1; 294 else if(fptr == &rate_deldatafunc) return 1; 295 else if(fptr == &test_slabhash_deldata) return 1; 296 #ifdef CLIENT_SUBNET 297 else if(fptr == &subnet_data_delete) return 1; 298 #endif 299 #ifdef USE_DNSCRYPT 300 else if(fptr == &dnsc_shared_secrets_deldatafunc) return 1; 301 else if(fptr == &dnsc_nonces_deldatafunc) return 1; 302 #endif 303 return 0; 304 } 305 306 int 307 fptr_whitelist_hash_markdelfunc(lruhash_markdelfunc_type fptr) 308 { 309 if(fptr == NULL) return 1; 310 else if(fptr == &rrset_markdel) return 1; 311 #ifdef CLIENT_SUBNET 312 else if(fptr == &subnet_markdel) return 1; 313 #endif 314 return 0; 315 } 316 317 /** whitelist env->send_query callbacks */ 318 int 319 fptr_whitelist_modenv_send_query(struct outbound_entry* (*fptr)( 320 struct query_info* qinfo, uint16_t flags, int dnssec, int want_dnssec, 321 int nocaps, struct sockaddr_storage* addr, socklen_t addrlen, 322 uint8_t* zone, size_t zonelen, int ssl_upstream, char* tls_auth_name, 323 struct module_qstate* q)) 324 { 325 if(fptr == &worker_send_query) return 1; 326 else if(fptr == &libworker_send_query) return 1; 327 return 0; 328 } 329 330 int 331 fptr_whitelist_modenv_detach_subs(void (*fptr)( 332 struct module_qstate* qstate)) 333 { 334 if(fptr == &mesh_detach_subs) return 1; 335 return 0; 336 } 337 338 int 339 fptr_whitelist_modenv_attach_sub(int (*fptr)( 340 struct module_qstate* qstate, struct query_info* qinfo, 341 uint16_t qflags, int prime, int valrec, struct module_qstate** newq)) 342 { 343 if(fptr == &mesh_attach_sub) return 1; 344 return 0; 345 } 346 347 int 348 fptr_whitelist_modenv_add_sub(int (*fptr)( 349 struct module_qstate* qstate, struct query_info* qinfo, 350 uint16_t qflags, int prime, int valrec, struct module_qstate** newq, 351 struct mesh_state** sub)) 352 { 353 if(fptr == &mesh_add_sub) return 1; 354 return 0; 355 } 356 357 int 358 fptr_whitelist_modenv_kill_sub(void (*fptr)(struct module_qstate* newq)) 359 { 360 if(fptr == &mesh_state_delete) return 1; 361 return 0; 362 } 363 364 int 365 fptr_whitelist_modenv_detect_cycle(int (*fptr)( 366 struct module_qstate* qstate, struct query_info* qinfo, 367 uint16_t flags, int prime, int valrec)) 368 { 369 if(fptr == &mesh_detect_cycle) return 1; 370 return 0; 371 } 372 373 int 374 fptr_whitelist_mod_init(int (*fptr)(struct module_env* env, int id)) 375 { 376 if(fptr == &iter_init) return 1; 377 else if(fptr == &val_init) return 1; 378 else if(fptr == &dns64_init) return 1; 379 else if(fptr == &respip_init) return 1; 380 #ifdef WITH_PYTHONMODULE 381 else if(fptr == &pythonmod_init) return 1; 382 #endif 383 #ifdef USE_CACHEDB 384 else if(fptr == &cachedb_init) return 1; 385 #endif 386 #ifdef USE_IPSECMOD 387 else if(fptr == &ipsecmod_init) return 1; 388 #endif 389 #ifdef CLIENT_SUBNET 390 else if(fptr == &subnetmod_init) return 1; 391 #endif 392 #ifdef USE_IPSET 393 else if(fptr == &ipset_init) return 1; 394 #endif 395 return 0; 396 } 397 398 int 399 fptr_whitelist_mod_deinit(void (*fptr)(struct module_env* env, int id)) 400 { 401 if(fptr == &iter_deinit) return 1; 402 else if(fptr == &val_deinit) return 1; 403 else if(fptr == &dns64_deinit) return 1; 404 else if(fptr == &respip_deinit) return 1; 405 #ifdef WITH_PYTHONMODULE 406 else if(fptr == &pythonmod_deinit) return 1; 407 #endif 408 #ifdef USE_CACHEDB 409 else if(fptr == &cachedb_deinit) return 1; 410 #endif 411 #ifdef USE_IPSECMOD 412 else if(fptr == &ipsecmod_deinit) return 1; 413 #endif 414 #ifdef CLIENT_SUBNET 415 else if(fptr == &subnetmod_deinit) return 1; 416 #endif 417 #ifdef USE_IPSET 418 else if(fptr == &ipset_deinit) return 1; 419 #endif 420 return 0; 421 } 422 423 int 424 fptr_whitelist_mod_operate(void (*fptr)(struct module_qstate* qstate, 425 enum module_ev event, int id, struct outbound_entry* outbound)) 426 { 427 if(fptr == &iter_operate) return 1; 428 else if(fptr == &val_operate) return 1; 429 else if(fptr == &dns64_operate) return 1; 430 else if(fptr == &respip_operate) return 1; 431 #ifdef WITH_PYTHONMODULE 432 else if(fptr == &pythonmod_operate) return 1; 433 #endif 434 #ifdef USE_CACHEDB 435 else if(fptr == &cachedb_operate) return 1; 436 #endif 437 #ifdef USE_IPSECMOD 438 else if(fptr == &ipsecmod_operate) return 1; 439 #endif 440 #ifdef CLIENT_SUBNET 441 else if(fptr == &subnetmod_operate) return 1; 442 #endif 443 #ifdef USE_IPSET 444 else if(fptr == &ipset_operate) return 1; 445 #endif 446 return 0; 447 } 448 449 int 450 fptr_whitelist_mod_inform_super(void (*fptr)( 451 struct module_qstate* qstate, int id, struct module_qstate* super)) 452 { 453 if(fptr == &iter_inform_super) return 1; 454 else if(fptr == &val_inform_super) return 1; 455 else if(fptr == &dns64_inform_super) return 1; 456 else if(fptr == &respip_inform_super) return 1; 457 #ifdef WITH_PYTHONMODULE 458 else if(fptr == &pythonmod_inform_super) return 1; 459 #endif 460 #ifdef USE_CACHEDB 461 else if(fptr == &cachedb_inform_super) return 1; 462 #endif 463 #ifdef USE_IPSECMOD 464 else if(fptr == &ipsecmod_inform_super) return 1; 465 #endif 466 #ifdef CLIENT_SUBNET 467 else if(fptr == &subnetmod_inform_super) return 1; 468 #endif 469 #ifdef USE_IPSET 470 else if(fptr == &ipset_inform_super) return 1; 471 #endif 472 return 0; 473 } 474 475 int 476 fptr_whitelist_mod_clear(void (*fptr)(struct module_qstate* qstate, 477 int id)) 478 { 479 if(fptr == &iter_clear) return 1; 480 else if(fptr == &val_clear) return 1; 481 else if(fptr == &dns64_clear) return 1; 482 else if(fptr == &respip_clear) return 1; 483 #ifdef WITH_PYTHONMODULE 484 else if(fptr == &pythonmod_clear) return 1; 485 #endif 486 #ifdef USE_CACHEDB 487 else if(fptr == &cachedb_clear) return 1; 488 #endif 489 #ifdef USE_IPSECMOD 490 else if(fptr == &ipsecmod_clear) return 1; 491 #endif 492 #ifdef CLIENT_SUBNET 493 else if(fptr == &subnetmod_clear) return 1; 494 #endif 495 #ifdef USE_IPSET 496 else if(fptr == &ipset_clear) return 1; 497 #endif 498 return 0; 499 } 500 501 int 502 fptr_whitelist_mod_get_mem(size_t (*fptr)(struct module_env* env, int id)) 503 { 504 if(fptr == &iter_get_mem) return 1; 505 else if(fptr == &val_get_mem) return 1; 506 else if(fptr == &dns64_get_mem) return 1; 507 else if(fptr == &respip_get_mem) return 1; 508 #ifdef WITH_PYTHONMODULE 509 else if(fptr == &pythonmod_get_mem) return 1; 510 #endif 511 #ifdef USE_CACHEDB 512 else if(fptr == &cachedb_get_mem) return 1; 513 #endif 514 #ifdef USE_IPSECMOD 515 else if(fptr == &ipsecmod_get_mem) return 1; 516 #endif 517 #ifdef CLIENT_SUBNET 518 else if(fptr == &subnetmod_get_mem) return 1; 519 #endif 520 #ifdef USE_IPSET 521 else if(fptr == &ipset_get_mem) return 1; 522 #endif 523 return 0; 524 } 525 526 int 527 fptr_whitelist_alloc_cleanup(void (*fptr)(void*)) 528 { 529 if(fptr == &worker_alloc_cleanup) return 1; 530 return 0; 531 } 532 533 int fptr_whitelist_tube_listen(tube_callback_type* fptr) 534 { 535 if(fptr == &worker_handle_control_cmd) return 1; 536 else if(fptr == &libworker_handle_control_cmd) return 1; 537 return 0; 538 } 539 540 int fptr_whitelist_mesh_cb(mesh_cb_func_type fptr) 541 { 542 if(fptr == &libworker_fg_done_cb) return 1; 543 else if(fptr == &libworker_bg_done_cb) return 1; 544 else if(fptr == &libworker_event_done_cb) return 1; 545 else if(fptr == &probe_answer_cb) return 1; 546 else if(fptr == &auth_xfer_probe_lookup_callback) return 1; 547 else if(fptr == &auth_xfer_transfer_lookup_callback) return 1; 548 return 0; 549 } 550 551 int fptr_whitelist_print_func(void (*fptr)(char*,void*)) 552 { 553 if(fptr == &config_print_func) return 1; 554 else if(fptr == &config_collate_func) return 1; 555 else if(fptr == &remote_get_opt_ssl) return 1; 556 return 0; 557 } 558 559 int fptr_whitelist_inplace_cb_reply_generic(inplace_cb_reply_func_type* fptr, 560 enum inplace_cb_list_type type) 561 { 562 #ifndef WITH_PYTHONMODULE 563 (void)fptr; 564 #endif 565 if(type == inplace_cb_reply) { 566 #ifdef WITH_PYTHONMODULE 567 if(fptr == &python_inplace_cb_reply_generic) return 1; 568 #endif 569 } else if(type == inplace_cb_reply_cache) { 570 #ifdef WITH_PYTHONMODULE 571 if(fptr == &python_inplace_cb_reply_generic) return 1; 572 #endif 573 } else if(type == inplace_cb_reply_local) { 574 #ifdef WITH_PYTHONMODULE 575 if(fptr == &python_inplace_cb_reply_generic) return 1; 576 #endif 577 } else if(type == inplace_cb_reply_servfail) { 578 #ifdef WITH_PYTHONMODULE 579 if(fptr == &python_inplace_cb_reply_generic) return 1; 580 #endif 581 } 582 return 0; 583 } 584 585 int fptr_whitelist_inplace_cb_query(inplace_cb_query_func_type* fptr) 586 { 587 #ifdef CLIENT_SUBNET 588 if(fptr == &ecs_whitelist_check) 589 return 1; 590 #endif 591 #ifdef WITH_PYTHONMODULE 592 if(fptr == &python_inplace_cb_query_generic) 593 return 1; 594 #endif 595 (void)fptr; 596 return 0; 597 } 598 599 int fptr_whitelist_inplace_cb_edns_back_parsed( 600 inplace_cb_edns_back_parsed_func_type* fptr) 601 { 602 #ifdef CLIENT_SUBNET 603 if(fptr == &ecs_edns_back_parsed) 604 return 1; 605 #else 606 (void)fptr; 607 #endif 608 return 0; 609 } 610 611 int fptr_whitelist_inplace_cb_query_response( 612 inplace_cb_query_response_func_type* fptr) 613 { 614 #ifdef CLIENT_SUBNET 615 if(fptr == &ecs_query_response) 616 return 1; 617 #else 618 (void)fptr; 619 #endif 620 return 0; 621 } 622 623 int fptr_whitelist_serve_expired_lookup(serve_expired_lookup_func_type* fptr) 624 { 625 if(fptr == &mesh_serve_expired_lookup) 626 return 1; 627 return 0; 628 } 629