fptr_wlist.c revision 356345
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 97int 98fptr_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 110int 111fptr_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 120int 121fptr_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 return 0; 135} 136 137int 138fptr_whitelist_comm_signal(void (*fptr)(int, void*)) 139{ 140 if(fptr == &worker_sighandler) return 1; 141 return 0; 142} 143 144int fptr_whitelist_start_accept(void (*fptr)(void*)) 145{ 146 if(fptr == &worker_start_accept) return 1; 147 return 0; 148} 149 150int fptr_whitelist_stop_accept(void (*fptr)(void*)) 151{ 152 if(fptr == &worker_stop_accept) return 1; 153 return 0; 154} 155 156int 157fptr_whitelist_event(void (*fptr)(int, short, void *)) 158{ 159 if(fptr == &comm_point_udp_callback) return 1; 160 else if(fptr == &comm_point_udp_ancil_callback) return 1; 161 else if(fptr == &comm_point_tcp_accept_callback) return 1; 162 else if(fptr == &comm_point_tcp_handle_callback) return 1; 163 else if(fptr == &comm_timer_callback) return 1; 164 else if(fptr == &comm_signal_callback) return 1; 165 else if(fptr == &comm_point_local_handle_callback) return 1; 166 else if(fptr == &comm_point_raw_handle_callback) return 1; 167 else if(fptr == &tube_handle_signal) return 1; 168 else if(fptr == &comm_base_handle_slow_accept) return 1; 169 else if(fptr == &comm_point_http_handle_callback) return 1; 170#ifdef UB_ON_WINDOWS 171 else if(fptr == &worker_win_stop_cb) return 1; 172#endif 173 return 0; 174} 175 176int 177fptr_whitelist_pending_udp(comm_point_callback_type *fptr) 178{ 179 if(fptr == &serviced_udp_callback) return 1; 180 else if(fptr == &worker_handle_reply) return 1; 181 else if(fptr == &libworker_handle_reply) return 1; 182 return 0; 183} 184 185int 186fptr_whitelist_pending_tcp(comm_point_callback_type *fptr) 187{ 188 if(fptr == &serviced_tcp_callback) return 1; 189 else if(fptr == &worker_handle_reply) return 1; 190 else if(fptr == &libworker_handle_reply) return 1; 191 return 0; 192} 193 194int 195fptr_whitelist_serviced_query(comm_point_callback_type *fptr) 196{ 197 if(fptr == &worker_handle_service_reply) return 1; 198 else if(fptr == &libworker_handle_service_reply) return 1; 199 return 0; 200} 201 202int 203fptr_whitelist_rbtree_cmp(int (*fptr) (const void *, const void *)) 204{ 205 if(fptr == &mesh_state_compare) return 1; 206 else if(fptr == &mesh_state_ref_compare) return 1; 207 else if(fptr == &addr_tree_compare) return 1; 208 else if(fptr == &local_zone_cmp) return 1; 209 else if(fptr == &local_data_cmp) return 1; 210 else if(fptr == &fwd_cmp) return 1; 211 else if(fptr == &pending_cmp) return 1; 212 else if(fptr == &serviced_cmp) return 1; 213 else if(fptr == &name_tree_compare) return 1; 214 else if(fptr == &order_lock_cmp) return 1; 215 else if(fptr == &codeline_cmp) return 1; 216 else if(fptr == &nsec3_hash_cmp) return 1; 217 else if(fptr == &mini_ev_cmp) return 1; 218 else if(fptr == &anchor_cmp) return 1; 219 else if(fptr == &canonical_tree_compare) return 1; 220 else if(fptr == &context_query_cmp) return 1; 221 else if(fptr == &val_neg_data_compare) return 1; 222 else if(fptr == &val_neg_zone_compare) return 1; 223 else if(fptr == &probetree_cmp) return 1; 224 else if(fptr == &replay_var_compare) return 1; 225 else if(fptr == &view_cmp) return 1; 226 else if(fptr == &auth_zone_cmp) return 1; 227 else if(fptr == &auth_data_cmp) return 1; 228 else if(fptr == &auth_xfer_cmp) return 1; 229 return 0; 230} 231 232int 233fptr_whitelist_hash_sizefunc(lruhash_sizefunc_type fptr) 234{ 235 if(fptr == &msgreply_sizefunc) return 1; 236 else if(fptr == &ub_rrset_sizefunc) return 1; 237 else if(fptr == &infra_sizefunc) return 1; 238 else if(fptr == &key_entry_sizefunc) return 1; 239 else if(fptr == &rate_sizefunc) return 1; 240 else if(fptr == &ip_rate_sizefunc) return 1; 241 else if(fptr == &test_slabhash_sizefunc) return 1; 242#ifdef CLIENT_SUBNET 243 else if(fptr == &msg_cache_sizefunc) return 1; 244#endif 245#ifdef USE_DNSCRYPT 246 else if(fptr == &dnsc_shared_secrets_sizefunc) return 1; 247 else if(fptr == &dnsc_nonces_sizefunc) return 1; 248#endif 249 return 0; 250} 251 252int 253fptr_whitelist_hash_compfunc(lruhash_compfunc_type fptr) 254{ 255 if(fptr == &query_info_compare) return 1; 256 else if(fptr == &ub_rrset_compare) return 1; 257 else if(fptr == &infra_compfunc) return 1; 258 else if(fptr == &key_entry_compfunc) return 1; 259 else if(fptr == &rate_compfunc) return 1; 260 else if(fptr == &ip_rate_compfunc) return 1; 261 else if(fptr == &test_slabhash_compfunc) return 1; 262#ifdef USE_DNSCRYPT 263 else if(fptr == &dnsc_shared_secrets_compfunc) return 1; 264 else if(fptr == &dnsc_nonces_compfunc) return 1; 265#endif 266 return 0; 267} 268 269int 270fptr_whitelist_hash_delkeyfunc(lruhash_delkeyfunc_type fptr) 271{ 272 if(fptr == &query_entry_delete) return 1; 273 else if(fptr == &ub_rrset_key_delete) return 1; 274 else if(fptr == &infra_delkeyfunc) return 1; 275 else if(fptr == &key_entry_delkeyfunc) return 1; 276 else if(fptr == &rate_delkeyfunc) return 1; 277 else if(fptr == &ip_rate_delkeyfunc) return 1; 278 else if(fptr == &test_slabhash_delkey) return 1; 279#ifdef USE_DNSCRYPT 280 else if(fptr == &dnsc_shared_secrets_delkeyfunc) return 1; 281 else if(fptr == &dnsc_nonces_delkeyfunc) return 1; 282#endif 283 return 0; 284} 285 286int 287fptr_whitelist_hash_deldatafunc(lruhash_deldatafunc_type fptr) 288{ 289 if(fptr == &reply_info_delete) return 1; 290 else if(fptr == &rrset_data_delete) return 1; 291 else if(fptr == &infra_deldatafunc) return 1; 292 else if(fptr == &key_entry_deldatafunc) return 1; 293 else if(fptr == &rate_deldatafunc) return 1; 294 else if(fptr == &test_slabhash_deldata) return 1; 295#ifdef CLIENT_SUBNET 296 else if(fptr == &subnet_data_delete) return 1; 297#endif 298#ifdef USE_DNSCRYPT 299 else if(fptr == &dnsc_shared_secrets_deldatafunc) return 1; 300 else if(fptr == &dnsc_nonces_deldatafunc) return 1; 301#endif 302 return 0; 303} 304 305int 306fptr_whitelist_hash_markdelfunc(lruhash_markdelfunc_type fptr) 307{ 308 if(fptr == NULL) return 1; 309 else if(fptr == &rrset_markdel) return 1; 310#ifdef CLIENT_SUBNET 311 else if(fptr == &subnet_markdel) return 1; 312#endif 313 return 0; 314} 315 316/** whitelist env->send_query callbacks */ 317int 318fptr_whitelist_modenv_send_query(struct outbound_entry* (*fptr)( 319 struct query_info* qinfo, uint16_t flags, int dnssec, int want_dnssec, 320 int nocaps, struct sockaddr_storage* addr, socklen_t addrlen, 321 uint8_t* zone, size_t zonelen, int ssl_upstream, char* tls_auth_name, 322 struct module_qstate* q)) 323{ 324 if(fptr == &worker_send_query) return 1; 325 else if(fptr == &libworker_send_query) return 1; 326 return 0; 327} 328 329int 330fptr_whitelist_modenv_detach_subs(void (*fptr)( 331 struct module_qstate* qstate)) 332{ 333 if(fptr == &mesh_detach_subs) return 1; 334 return 0; 335} 336 337int 338fptr_whitelist_modenv_attach_sub(int (*fptr)( 339 struct module_qstate* qstate, struct query_info* qinfo, 340 uint16_t qflags, int prime, int valrec, struct module_qstate** newq)) 341{ 342 if(fptr == &mesh_attach_sub) return 1; 343 return 0; 344} 345 346int 347fptr_whitelist_modenv_add_sub(int (*fptr)( 348 struct module_qstate* qstate, struct query_info* qinfo, 349 uint16_t qflags, int prime, int valrec, struct module_qstate** newq, 350 struct mesh_state** sub)) 351{ 352 if(fptr == &mesh_add_sub) return 1; 353 return 0; 354} 355 356int 357fptr_whitelist_modenv_kill_sub(void (*fptr)(struct module_qstate* newq)) 358{ 359 if(fptr == &mesh_state_delete) return 1; 360 return 0; 361} 362 363int 364fptr_whitelist_modenv_detect_cycle(int (*fptr)( 365 struct module_qstate* qstate, struct query_info* qinfo, 366 uint16_t flags, int prime, int valrec)) 367{ 368 if(fptr == &mesh_detect_cycle) return 1; 369 return 0; 370} 371 372int 373fptr_whitelist_mod_init(int (*fptr)(struct module_env* env, int id)) 374{ 375 if(fptr == &iter_init) return 1; 376 else if(fptr == &val_init) return 1; 377 else if(fptr == &dns64_init) return 1; 378 else if(fptr == &respip_init) return 1; 379#ifdef WITH_PYTHONMODULE 380 else if(fptr == &pythonmod_init) return 1; 381#endif 382#ifdef USE_CACHEDB 383 else if(fptr == &cachedb_init) return 1; 384#endif 385#ifdef USE_IPSECMOD 386 else if(fptr == &ipsecmod_init) return 1; 387#endif 388#ifdef CLIENT_SUBNET 389 else if(fptr == &subnetmod_init) return 1; 390#endif 391#ifdef USE_IPSET 392 else if(fptr == &ipset_init) return 1; 393#endif 394 return 0; 395} 396 397int 398fptr_whitelist_mod_deinit(void (*fptr)(struct module_env* env, int id)) 399{ 400 if(fptr == &iter_deinit) return 1; 401 else if(fptr == &val_deinit) return 1; 402 else if(fptr == &dns64_deinit) return 1; 403 else if(fptr == &respip_deinit) return 1; 404#ifdef WITH_PYTHONMODULE 405 else if(fptr == &pythonmod_deinit) return 1; 406#endif 407#ifdef USE_CACHEDB 408 else if(fptr == &cachedb_deinit) return 1; 409#endif 410#ifdef USE_IPSECMOD 411 else if(fptr == &ipsecmod_deinit) return 1; 412#endif 413#ifdef CLIENT_SUBNET 414 else if(fptr == &subnetmod_deinit) return 1; 415#endif 416#ifdef USE_IPSET 417 else if(fptr == &ipset_deinit) return 1; 418#endif 419 return 0; 420} 421 422int 423fptr_whitelist_mod_operate(void (*fptr)(struct module_qstate* qstate, 424 enum module_ev event, int id, struct outbound_entry* outbound)) 425{ 426 if(fptr == &iter_operate) return 1; 427 else if(fptr == &val_operate) return 1; 428 else if(fptr == &dns64_operate) return 1; 429 else if(fptr == &respip_operate) return 1; 430#ifdef WITH_PYTHONMODULE 431 else if(fptr == &pythonmod_operate) return 1; 432#endif 433#ifdef USE_CACHEDB 434 else if(fptr == &cachedb_operate) return 1; 435#endif 436#ifdef USE_IPSECMOD 437 else if(fptr == &ipsecmod_operate) return 1; 438#endif 439#ifdef CLIENT_SUBNET 440 else if(fptr == &subnetmod_operate) return 1; 441#endif 442#ifdef USE_IPSET 443 else if(fptr == &ipset_operate) return 1; 444#endif 445 return 0; 446} 447 448int 449fptr_whitelist_mod_inform_super(void (*fptr)( 450 struct module_qstate* qstate, int id, struct module_qstate* super)) 451{ 452 if(fptr == &iter_inform_super) return 1; 453 else if(fptr == &val_inform_super) return 1; 454 else if(fptr == &dns64_inform_super) return 1; 455 else if(fptr == &respip_inform_super) return 1; 456#ifdef WITH_PYTHONMODULE 457 else if(fptr == &pythonmod_inform_super) return 1; 458#endif 459#ifdef USE_CACHEDB 460 else if(fptr == &cachedb_inform_super) return 1; 461#endif 462#ifdef USE_IPSECMOD 463 else if(fptr == &ipsecmod_inform_super) return 1; 464#endif 465#ifdef CLIENT_SUBNET 466 else if(fptr == &subnetmod_inform_super) return 1; 467#endif 468#ifdef USE_IPSET 469 else if(fptr == &ipset_inform_super) return 1; 470#endif 471 return 0; 472} 473 474int 475fptr_whitelist_mod_clear(void (*fptr)(struct module_qstate* qstate, 476 int id)) 477{ 478 if(fptr == &iter_clear) return 1; 479 else if(fptr == &val_clear) return 1; 480 else if(fptr == &dns64_clear) return 1; 481 else if(fptr == &respip_clear) return 1; 482#ifdef WITH_PYTHONMODULE 483 else if(fptr == &pythonmod_clear) return 1; 484#endif 485#ifdef USE_CACHEDB 486 else if(fptr == &cachedb_clear) return 1; 487#endif 488#ifdef USE_IPSECMOD 489 else if(fptr == &ipsecmod_clear) return 1; 490#endif 491#ifdef CLIENT_SUBNET 492 else if(fptr == &subnetmod_clear) return 1; 493#endif 494#ifdef USE_IPSET 495 else if(fptr == &ipset_clear) return 1; 496#endif 497 return 0; 498} 499 500int 501fptr_whitelist_mod_get_mem(size_t (*fptr)(struct module_env* env, int id)) 502{ 503 if(fptr == &iter_get_mem) return 1; 504 else if(fptr == &val_get_mem) return 1; 505 else if(fptr == &dns64_get_mem) return 1; 506 else if(fptr == &respip_get_mem) return 1; 507#ifdef WITH_PYTHONMODULE 508 else if(fptr == &pythonmod_get_mem) return 1; 509#endif 510#ifdef USE_CACHEDB 511 else if(fptr == &cachedb_get_mem) return 1; 512#endif 513#ifdef USE_IPSECMOD 514 else if(fptr == &ipsecmod_get_mem) return 1; 515#endif 516#ifdef CLIENT_SUBNET 517 else if(fptr == &subnetmod_get_mem) return 1; 518#endif 519#ifdef USE_IPSET 520 else if(fptr == &ipset_get_mem) return 1; 521#endif 522 return 0; 523} 524 525int 526fptr_whitelist_alloc_cleanup(void (*fptr)(void*)) 527{ 528 if(fptr == &worker_alloc_cleanup) return 1; 529 return 0; 530} 531 532int fptr_whitelist_tube_listen(tube_callback_type* fptr) 533{ 534 if(fptr == &worker_handle_control_cmd) return 1; 535 else if(fptr == &libworker_handle_control_cmd) return 1; 536 return 0; 537} 538 539int fptr_whitelist_mesh_cb(mesh_cb_func_type fptr) 540{ 541 if(fptr == &libworker_fg_done_cb) return 1; 542 else if(fptr == &libworker_bg_done_cb) return 1; 543 else if(fptr == &libworker_event_done_cb) return 1; 544 else if(fptr == &probe_answer_cb) return 1; 545 else if(fptr == &auth_xfer_probe_lookup_callback) return 1; 546 else if(fptr == &auth_xfer_transfer_lookup_callback) return 1; 547 return 0; 548} 549 550int fptr_whitelist_print_func(void (*fptr)(char*,void*)) 551{ 552 if(fptr == &config_print_func) return 1; 553 else if(fptr == &config_collate_func) return 1; 554 else if(fptr == &remote_get_opt_ssl) return 1; 555 return 0; 556} 557 558int fptr_whitelist_inplace_cb_reply_generic(inplace_cb_reply_func_type* fptr, 559 enum inplace_cb_list_type type) 560{ 561#ifndef WITH_PYTHONMODULE 562 (void)fptr; 563#endif 564 if(type == inplace_cb_reply) { 565#ifdef WITH_PYTHONMODULE 566 if(fptr == &python_inplace_cb_reply_generic) return 1; 567#endif 568 } else if(type == inplace_cb_reply_cache) { 569#ifdef WITH_PYTHONMODULE 570 if(fptr == &python_inplace_cb_reply_generic) return 1; 571#endif 572 } else if(type == inplace_cb_reply_local) { 573#ifdef WITH_PYTHONMODULE 574 if(fptr == &python_inplace_cb_reply_generic) return 1; 575#endif 576 } else if(type == inplace_cb_reply_servfail) { 577#ifdef WITH_PYTHONMODULE 578 if(fptr == &python_inplace_cb_reply_generic) return 1; 579#endif 580 } 581 return 0; 582} 583 584int fptr_whitelist_inplace_cb_query(inplace_cb_query_func_type* fptr) 585{ 586#ifdef CLIENT_SUBNET 587 if(fptr == &ecs_whitelist_check) 588 return 1; 589#endif 590#ifdef WITH_PYTHONMODULE 591 if(fptr == &python_inplace_cb_query_generic) 592 return 1; 593#endif 594 (void)fptr; 595 return 0; 596} 597 598int fptr_whitelist_inplace_cb_edns_back_parsed( 599 inplace_cb_edns_back_parsed_func_type* fptr) 600{ 601#ifdef CLIENT_SUBNET 602 if(fptr == &ecs_edns_back_parsed) 603 return 1; 604#else 605 (void)fptr; 606#endif 607 return 0; 608} 609 610int fptr_whitelist_inplace_cb_query_response( 611 inplace_cb_query_response_func_type* fptr) 612{ 613#ifdef CLIENT_SUBNET 614 if(fptr == &ecs_query_response) 615 return 1; 616#else 617 (void)fptr; 618#endif 619 return 0; 620} 621 622