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 94 int 95 fptr_whitelist_comm_point(comm_point_callback_type *fptr) 96 { 97 if(fptr == &worker_handle_request) return 1; 98 else if(fptr == &outnet_udp_cb) return 1; 99 else if(fptr == &outnet_tcp_cb) return 1; 100 else if(fptr == &tube_handle_listen) return 1; 101 return 0; 102 } 103 104 int 105 fptr_whitelist_comm_point_raw(comm_point_callback_type *fptr) 106 { 107 if(fptr == &tube_handle_listen) return 1; 108 else if(fptr == &tube_handle_write) return 1; 109 else if(fptr == &remote_accept_callback) return 1; 110 else if(fptr == &remote_control_callback) return 1; 111 return 0; 112 } 113 114 int 115 fptr_whitelist_comm_timer(void (*fptr)(void*)) 116 { 117 if(fptr == &pending_udp_timer_cb) return 1; 118 else if(fptr == &outnet_tcptimer) return 1; 119 else if(fptr == &pending_udp_timer_delay_cb) return 1; 120 else if(fptr == &worker_stat_timer_cb) return 1; 121 else if(fptr == &worker_probe_timer_cb) return 1; 122 #ifdef UB_ON_WINDOWS 123 else if(fptr == &wsvc_cron_cb) return 1; 124 #endif 125 return 0; 126 } 127 128 int 129 fptr_whitelist_comm_signal(void (*fptr)(int, void*)) 130 { 131 if(fptr == &worker_sighandler) return 1; 132 return 0; 133 } 134 135 int fptr_whitelist_start_accept(void (*fptr)(void*)) 136 { 137 if(fptr == &worker_start_accept) return 1; 138 return 0; 139 } 140 141 int fptr_whitelist_stop_accept(void (*fptr)(void*)) 142 { 143 if(fptr == &worker_stop_accept) return 1; 144 return 0; 145 } 146 147 int 148 fptr_whitelist_event(void (*fptr)(int, short, void *)) 149 { 150 if(fptr == &comm_point_udp_callback) return 1; 151 else if(fptr == &comm_point_udp_ancil_callback) return 1; 152 else if(fptr == &comm_point_tcp_accept_callback) return 1; 153 else if(fptr == &comm_point_tcp_handle_callback) return 1; 154 else if(fptr == &comm_timer_callback) return 1; 155 else if(fptr == &comm_signal_callback) return 1; 156 else if(fptr == &comm_point_local_handle_callback) return 1; 157 else if(fptr == &comm_point_raw_handle_callback) return 1; 158 else if(fptr == &tube_handle_signal) return 1; 159 else if(fptr == &comm_base_handle_slow_accept) return 1; 160 #ifdef UB_ON_WINDOWS 161 else if(fptr == &worker_win_stop_cb) return 1; 162 #endif 163 return 0; 164 } 165 166 int 167 fptr_whitelist_pending_udp(comm_point_callback_type *fptr) 168 { 169 if(fptr == &serviced_udp_callback) return 1; 170 else if(fptr == &worker_handle_reply) return 1; 171 else if(fptr == &libworker_handle_reply) return 1; 172 return 0; 173 } 174 175 int 176 fptr_whitelist_pending_tcp(comm_point_callback_type *fptr) 177 { 178 if(fptr == &serviced_tcp_callback) return 1; 179 else if(fptr == &worker_handle_reply) return 1; 180 else if(fptr == &libworker_handle_reply) return 1; 181 return 0; 182 } 183 184 int 185 fptr_whitelist_serviced_query(comm_point_callback_type *fptr) 186 { 187 if(fptr == &worker_handle_service_reply) return 1; 188 else if(fptr == &libworker_handle_service_reply) return 1; 189 return 0; 190 } 191 192 int 193 fptr_whitelist_rbtree_cmp(int (*fptr) (const void *, const void *)) 194 { 195 if(fptr == &mesh_state_compare) return 1; 196 else if(fptr == &mesh_state_ref_compare) return 1; 197 else if(fptr == &addr_tree_compare) return 1; 198 else if(fptr == &local_zone_cmp) return 1; 199 else if(fptr == &local_data_cmp) return 1; 200 else if(fptr == &fwd_cmp) return 1; 201 else if(fptr == &pending_cmp) return 1; 202 else if(fptr == &serviced_cmp) return 1; 203 else if(fptr == &name_tree_compare) return 1; 204 else if(fptr == &order_lock_cmp) return 1; 205 else if(fptr == &codeline_cmp) return 1; 206 else if(fptr == &nsec3_hash_cmp) return 1; 207 else if(fptr == &mini_ev_cmp) return 1; 208 else if(fptr == &anchor_cmp) return 1; 209 else if(fptr == &canonical_tree_compare) return 1; 210 else if(fptr == &context_query_cmp) return 1; 211 else if(fptr == &val_neg_data_compare) return 1; 212 else if(fptr == &val_neg_zone_compare) return 1; 213 else if(fptr == &probetree_cmp) return 1; 214 else if(fptr == &replay_var_compare) return 1; 215 else if(fptr == &view_cmp) return 1; 216 else if(fptr == &auth_zone_cmp) return 1; 217 else if(fptr == &auth_data_cmp) return 1; 218 return 0; 219 } 220 221 int 222 fptr_whitelist_hash_sizefunc(lruhash_sizefunc_type fptr) 223 { 224 if(fptr == &msgreply_sizefunc) return 1; 225 else if(fptr == &ub_rrset_sizefunc) return 1; 226 else if(fptr == &infra_sizefunc) return 1; 227 else if(fptr == &key_entry_sizefunc) return 1; 228 else if(fptr == &rate_sizefunc) return 1; 229 else if(fptr == &ip_rate_sizefunc) return 1; 230 else if(fptr == &test_slabhash_sizefunc) return 1; 231 #ifdef CLIENT_SUBNET 232 else if(fptr == &msg_cache_sizefunc) return 1; 233 #endif 234 #ifdef USE_DNSCRYPT 235 else if(fptr == &dnsc_shared_secrets_sizefunc) return 1; 236 else if(fptr == &dnsc_nonces_sizefunc) return 1; 237 #endif 238 return 0; 239 } 240 241 int 242 fptr_whitelist_hash_compfunc(lruhash_compfunc_type fptr) 243 { 244 if(fptr == &query_info_compare) return 1; 245 else if(fptr == &ub_rrset_compare) return 1; 246 else if(fptr == &infra_compfunc) return 1; 247 else if(fptr == &key_entry_compfunc) return 1; 248 else if(fptr == &rate_compfunc) return 1; 249 else if(fptr == &ip_rate_compfunc) return 1; 250 else if(fptr == &test_slabhash_compfunc) return 1; 251 #ifdef USE_DNSCRYPT 252 else if(fptr == &dnsc_shared_secrets_compfunc) return 1; 253 else if(fptr == &dnsc_nonces_compfunc) return 1; 254 #endif 255 return 0; 256 } 257 258 int 259 fptr_whitelist_hash_delkeyfunc(lruhash_delkeyfunc_type fptr) 260 { 261 if(fptr == &query_entry_delete) return 1; 262 else if(fptr == &ub_rrset_key_delete) return 1; 263 else if(fptr == &infra_delkeyfunc) return 1; 264 else if(fptr == &key_entry_delkeyfunc) return 1; 265 else if(fptr == &rate_delkeyfunc) return 1; 266 else if(fptr == &ip_rate_delkeyfunc) return 1; 267 else if(fptr == &test_slabhash_delkey) return 1; 268 #ifdef USE_DNSCRYPT 269 else if(fptr == &dnsc_shared_secrets_delkeyfunc) return 1; 270 else if(fptr == &dnsc_nonces_delkeyfunc) return 1; 271 #endif 272 return 0; 273 } 274 275 int 276 fptr_whitelist_hash_deldatafunc(lruhash_deldatafunc_type fptr) 277 { 278 if(fptr == &reply_info_delete) return 1; 279 else if(fptr == &rrset_data_delete) return 1; 280 else if(fptr == &infra_deldatafunc) return 1; 281 else if(fptr == &key_entry_deldatafunc) return 1; 282 else if(fptr == &rate_deldatafunc) return 1; 283 else if(fptr == &test_slabhash_deldata) return 1; 284 #ifdef CLIENT_SUBNET 285 else if(fptr == &subnet_data_delete) return 1; 286 #endif 287 #ifdef USE_DNSCRYPT 288 else if(fptr == &dnsc_shared_secrets_deldatafunc) return 1; 289 else if(fptr == &dnsc_nonces_deldatafunc) return 1; 290 #endif 291 return 0; 292 } 293 294 int 295 fptr_whitelist_hash_markdelfunc(lruhash_markdelfunc_type fptr) 296 { 297 if(fptr == NULL) return 1; 298 else if(fptr == &rrset_markdel) return 1; 299 return 0; 300 } 301 302 /** whitelist env->send_query callbacks */ 303 int 304 fptr_whitelist_modenv_send_query(struct outbound_entry* (*fptr)( 305 struct query_info* qinfo, uint16_t flags, int dnssec, int want_dnssec, 306 int nocaps, struct sockaddr_storage* addr, socklen_t addrlen, 307 uint8_t* zone, size_t zonelen, int ssl_upstream, struct module_qstate* q)) 308 { 309 if(fptr == &worker_send_query) return 1; 310 else if(fptr == &libworker_send_query) return 1; 311 return 0; 312 } 313 314 int 315 fptr_whitelist_modenv_detach_subs(void (*fptr)( 316 struct module_qstate* qstate)) 317 { 318 if(fptr == &mesh_detach_subs) return 1; 319 return 0; 320 } 321 322 int 323 fptr_whitelist_modenv_attach_sub(int (*fptr)( 324 struct module_qstate* qstate, struct query_info* qinfo, 325 uint16_t qflags, int prime, int valrec, struct module_qstate** newq)) 326 { 327 if(fptr == &mesh_attach_sub) return 1; 328 return 0; 329 } 330 331 int 332 fptr_whitelist_modenv_add_sub(int (*fptr)( 333 struct module_qstate* qstate, struct query_info* qinfo, 334 uint16_t qflags, int prime, int valrec, struct module_qstate** newq, 335 struct mesh_state** sub)) 336 { 337 if(fptr == &mesh_add_sub) return 1; 338 return 0; 339 } 340 341 int 342 fptr_whitelist_modenv_kill_sub(void (*fptr)(struct module_qstate* newq)) 343 { 344 if(fptr == &mesh_state_delete) return 1; 345 return 0; 346 } 347 348 int 349 fptr_whitelist_modenv_detect_cycle(int (*fptr)( 350 struct module_qstate* qstate, struct query_info* qinfo, 351 uint16_t flags, int prime, int valrec)) 352 { 353 if(fptr == &mesh_detect_cycle) return 1; 354 return 0; 355 } 356 357 int 358 fptr_whitelist_mod_init(int (*fptr)(struct module_env* env, int id)) 359 { 360 if(fptr == &iter_init) return 1; 361 else if(fptr == &val_init) return 1; 362 else if(fptr == &dns64_init) return 1; 363 else if(fptr == &respip_init) return 1; 364 #ifdef WITH_PYTHONMODULE 365 else if(fptr == &pythonmod_init) return 1; 366 #endif 367 #ifdef USE_CACHEDB 368 else if(fptr == &cachedb_init) return 1; 369 #endif 370 #ifdef USE_IPSECMOD 371 else if(fptr == &ipsecmod_init) return 1; 372 #endif 373 #ifdef CLIENT_SUBNET 374 else if(fptr == &subnetmod_init) return 1; 375 #endif 376 return 0; 377 } 378 379 int 380 fptr_whitelist_mod_deinit(void (*fptr)(struct module_env* env, int id)) 381 { 382 if(fptr == &iter_deinit) return 1; 383 else if(fptr == &val_deinit) return 1; 384 else if(fptr == &dns64_deinit) return 1; 385 else if(fptr == &respip_deinit) return 1; 386 #ifdef WITH_PYTHONMODULE 387 else if(fptr == &pythonmod_deinit) return 1; 388 #endif 389 #ifdef USE_CACHEDB 390 else if(fptr == &cachedb_deinit) return 1; 391 #endif 392 #ifdef USE_IPSECMOD 393 else if(fptr == &ipsecmod_deinit) return 1; 394 #endif 395 #ifdef CLIENT_SUBNET 396 else if(fptr == &subnetmod_deinit) return 1; 397 #endif 398 return 0; 399 } 400 401 int 402 fptr_whitelist_mod_operate(void (*fptr)(struct module_qstate* qstate, 403 enum module_ev event, int id, struct outbound_entry* outbound)) 404 { 405 if(fptr == &iter_operate) return 1; 406 else if(fptr == &val_operate) return 1; 407 else if(fptr == &dns64_operate) return 1; 408 else if(fptr == &respip_operate) return 1; 409 #ifdef WITH_PYTHONMODULE 410 else if(fptr == &pythonmod_operate) return 1; 411 #endif 412 #ifdef USE_CACHEDB 413 else if(fptr == &cachedb_operate) return 1; 414 #endif 415 #ifdef USE_IPSECMOD 416 else if(fptr == &ipsecmod_operate) return 1; 417 #endif 418 #ifdef CLIENT_SUBNET 419 else if(fptr == &subnetmod_operate) return 1; 420 #endif 421 return 0; 422 } 423 424 int 425 fptr_whitelist_mod_inform_super(void (*fptr)( 426 struct module_qstate* qstate, int id, struct module_qstate* super)) 427 { 428 if(fptr == &iter_inform_super) return 1; 429 else if(fptr == &val_inform_super) return 1; 430 else if(fptr == &dns64_inform_super) return 1; 431 else if(fptr == &respip_inform_super) return 1; 432 #ifdef WITH_PYTHONMODULE 433 else if(fptr == &pythonmod_inform_super) return 1; 434 #endif 435 #ifdef USE_CACHEDB 436 else if(fptr == &cachedb_inform_super) return 1; 437 #endif 438 #ifdef USE_IPSECMOD 439 else if(fptr == &ipsecmod_inform_super) return 1; 440 #endif 441 #ifdef CLIENT_SUBNET 442 else if(fptr == &subnetmod_inform_super) return 1; 443 #endif 444 return 0; 445 } 446 447 int 448 fptr_whitelist_mod_clear(void (*fptr)(struct module_qstate* qstate, 449 int id)) 450 { 451 if(fptr == &iter_clear) return 1; 452 else if(fptr == &val_clear) return 1; 453 else if(fptr == &dns64_clear) return 1; 454 else if(fptr == &respip_clear) return 1; 455 #ifdef WITH_PYTHONMODULE 456 else if(fptr == &pythonmod_clear) return 1; 457 #endif 458 #ifdef USE_CACHEDB 459 else if(fptr == &cachedb_clear) return 1; 460 #endif 461 #ifdef USE_IPSECMOD 462 else if(fptr == &ipsecmod_clear) return 1; 463 #endif 464 #ifdef CLIENT_SUBNET 465 else if(fptr == &subnetmod_clear) return 1; 466 #endif 467 return 0; 468 } 469 470 int 471 fptr_whitelist_mod_get_mem(size_t (*fptr)(struct module_env* env, int id)) 472 { 473 if(fptr == &iter_get_mem) return 1; 474 else if(fptr == &val_get_mem) return 1; 475 else if(fptr == &dns64_get_mem) return 1; 476 else if(fptr == &respip_get_mem) return 1; 477 #ifdef WITH_PYTHONMODULE 478 else if(fptr == &pythonmod_get_mem) return 1; 479 #endif 480 #ifdef USE_CACHEDB 481 else if(fptr == &cachedb_get_mem) return 1; 482 #endif 483 #ifdef USE_IPSECMOD 484 else if(fptr == &ipsecmod_get_mem) return 1; 485 #endif 486 #ifdef CLIENT_SUBNET 487 else if(fptr == &subnetmod_get_mem) return 1; 488 #endif 489 return 0; 490 } 491 492 int 493 fptr_whitelist_alloc_cleanup(void (*fptr)(void*)) 494 { 495 if(fptr == &worker_alloc_cleanup) return 1; 496 return 0; 497 } 498 499 int fptr_whitelist_tube_listen(tube_callback_type* fptr) 500 { 501 if(fptr == &worker_handle_control_cmd) return 1; 502 else if(fptr == &libworker_handle_control_cmd) return 1; 503 return 0; 504 } 505 506 int fptr_whitelist_mesh_cb(mesh_cb_func_type fptr) 507 { 508 if(fptr == &libworker_fg_done_cb) return 1; 509 else if(fptr == &libworker_bg_done_cb) return 1; 510 else if(fptr == &libworker_event_done_cb) return 1; 511 else if(fptr == &probe_answer_cb) return 1; 512 return 0; 513 } 514 515 int fptr_whitelist_print_func(void (*fptr)(char*,void*)) 516 { 517 if(fptr == &config_print_func) return 1; 518 else if(fptr == &config_collate_func) return 1; 519 else if(fptr == &remote_get_opt_ssl) return 1; 520 return 0; 521 } 522 523 int fptr_whitelist_inplace_cb_reply_generic(inplace_cb_reply_func_type* fptr, 524 enum inplace_cb_list_type type) 525 { 526 #ifndef WITH_PYTHONMODULE 527 (void)fptr; 528 #endif 529 if(type == inplace_cb_reply) { 530 #ifdef WITH_PYTHONMODULE 531 if(fptr == &python_inplace_cb_reply_generic) return 1; 532 #endif 533 } else if(type == inplace_cb_reply_cache) { 534 #ifdef WITH_PYTHONMODULE 535 if(fptr == &python_inplace_cb_reply_generic) return 1; 536 #endif 537 } else if(type == inplace_cb_reply_local) { 538 #ifdef WITH_PYTHONMODULE 539 if(fptr == &python_inplace_cb_reply_generic) return 1; 540 #endif 541 } else if(type == inplace_cb_reply_servfail) { 542 #ifdef WITH_PYTHONMODULE 543 if(fptr == &python_inplace_cb_reply_generic) return 1; 544 #endif 545 } 546 return 0; 547 } 548 549 int fptr_whitelist_inplace_cb_query(inplace_cb_query_func_type* fptr) 550 { 551 #ifdef CLIENT_SUBNET 552 if(fptr == &ecs_whitelist_check) 553 return 1; 554 #else 555 (void)fptr; 556 #endif 557 return 0; 558 } 559 560 int fptr_whitelist_inplace_cb_edns_back_parsed( 561 inplace_cb_edns_back_parsed_func_type* fptr) 562 { 563 #ifdef CLIENT_SUBNET 564 if(fptr == &ecs_edns_back_parsed) 565 return 1; 566 #else 567 (void)fptr; 568 #endif 569 return 0; 570 } 571 572 int fptr_whitelist_inplace_cb_query_response( 573 inplace_cb_query_response_func_type* fptr) 574 { 575 #ifdef CLIENT_SUBNET 576 if(fptr == &ecs_query_response) 577 return 1; 578 #else 579 (void)fptr; 580 #endif 581 return 0; 582 } 583