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/cache/infra.h" 53 #include "services/cache/rrset.h" 54 #include "dns64/dns64.h" 55 #include "iterator/iterator.h" 56 #include "iterator/iter_fwd.h" 57 #include "validator/validator.h" 58 #include "validator/val_anchor.h" 59 #include "validator/val_nsec3.h" 60 #include "validator/val_sigcrypt.h" 61 #include "validator/val_kentry.h" 62 #include "validator/val_neg.h" 63 #include "validator/autotrust.h" 64 #include "util/data/msgreply.h" 65 #include "util/data/packed_rrset.h" 66 #include "util/storage/slabhash.h" 67 #include "util/storage/dnstree.h" 68 #include "util/locks.h" 69 #include "libunbound/libworker.h" 70 #include "libunbound/context.h" 71 #include "libunbound/worker.h" 72 #include "util/tube.h" 73 #include "util/config_file.h" 74 #ifdef UB_ON_WINDOWS 75 #include "winrc/win_svc.h" 76 #endif 77 78 #ifdef WITH_PYTHONMODULE 79 #include "pythonmod/pythonmod.h" 80 #endif 81 #ifdef USE_CACHEDB 82 #include "cachedb/cachedb.h" 83 #endif 84 85 int 86 fptr_whitelist_comm_point(comm_point_callback_t *fptr) 87 { 88 if(fptr == &worker_handle_request) return 1; 89 else if(fptr == &outnet_udp_cb) return 1; 90 else if(fptr == &outnet_tcp_cb) return 1; 91 else if(fptr == &tube_handle_listen) return 1; 92 return 0; 93 } 94 95 int 96 fptr_whitelist_comm_point_raw(comm_point_callback_t *fptr) 97 { 98 if(fptr == &tube_handle_listen) return 1; 99 else if(fptr == &tube_handle_write) return 1; 100 else if(fptr == &remote_accept_callback) return 1; 101 else if(fptr == &remote_control_callback) return 1; 102 return 0; 103 } 104 105 int 106 fptr_whitelist_comm_timer(void (*fptr)(void*)) 107 { 108 if(fptr == &pending_udp_timer_cb) return 1; 109 else if(fptr == &outnet_tcptimer) return 1; 110 else if(fptr == &pending_udp_timer_delay_cb) return 1; 111 else if(fptr == &worker_stat_timer_cb) return 1; 112 else if(fptr == &worker_probe_timer_cb) return 1; 113 #ifdef UB_ON_WINDOWS 114 else if(fptr == &wsvc_cron_cb) return 1; 115 #endif 116 return 0; 117 } 118 119 int 120 fptr_whitelist_comm_signal(void (*fptr)(int, void*)) 121 { 122 if(fptr == &worker_sighandler) return 1; 123 return 0; 124 } 125 126 int fptr_whitelist_start_accept(void (*fptr)(void*)) 127 { 128 if(fptr == &worker_start_accept) return 1; 129 return 0; 130 } 131 132 int fptr_whitelist_stop_accept(void (*fptr)(void*)) 133 { 134 if(fptr == &worker_stop_accept) return 1; 135 return 0; 136 } 137 138 int 139 fptr_whitelist_event(void (*fptr)(int, short, void *)) 140 { 141 if(fptr == &comm_point_udp_callback) return 1; 142 else if(fptr == &comm_point_udp_ancil_callback) return 1; 143 else if(fptr == &comm_point_tcp_accept_callback) return 1; 144 else if(fptr == &comm_point_tcp_handle_callback) return 1; 145 else if(fptr == &comm_timer_callback) return 1; 146 else if(fptr == &comm_signal_callback) return 1; 147 else if(fptr == &comm_point_local_handle_callback) return 1; 148 else if(fptr == &comm_point_raw_handle_callback) return 1; 149 else if(fptr == &tube_handle_signal) return 1; 150 else if(fptr == &comm_base_handle_slow_accept) return 1; 151 #ifdef UB_ON_WINDOWS 152 else if(fptr == &worker_win_stop_cb) return 1; 153 #endif 154 return 0; 155 } 156 157 int 158 fptr_whitelist_pending_udp(comm_point_callback_t *fptr) 159 { 160 if(fptr == &serviced_udp_callback) return 1; 161 else if(fptr == &worker_handle_reply) return 1; 162 else if(fptr == &libworker_handle_reply) return 1; 163 return 0; 164 } 165 166 int 167 fptr_whitelist_pending_tcp(comm_point_callback_t *fptr) 168 { 169 if(fptr == &serviced_tcp_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_serviced_query(comm_point_callback_t *fptr) 177 { 178 if(fptr == &worker_handle_service_reply) return 1; 179 else if(fptr == &libworker_handle_service_reply) return 1; 180 return 0; 181 } 182 183 int 184 fptr_whitelist_rbtree_cmp(int (*fptr) (const void *, const void *)) 185 { 186 if(fptr == &mesh_state_compare) return 1; 187 else if(fptr == &mesh_state_ref_compare) return 1; 188 else if(fptr == &addr_tree_compare) return 1; 189 else if(fptr == &local_zone_cmp) return 1; 190 else if(fptr == &local_data_cmp) return 1; 191 else if(fptr == &fwd_cmp) return 1; 192 else if(fptr == &pending_cmp) return 1; 193 else if(fptr == &serviced_cmp) return 1; 194 else if(fptr == &name_tree_compare) return 1; 195 else if(fptr == &order_lock_cmp) return 1; 196 else if(fptr == &codeline_cmp) return 1; 197 else if(fptr == &nsec3_hash_cmp) return 1; 198 else if(fptr == &mini_ev_cmp) return 1; 199 else if(fptr == &anchor_cmp) return 1; 200 else if(fptr == &canonical_tree_compare) return 1; 201 else if(fptr == &context_query_cmp) return 1; 202 else if(fptr == &val_neg_data_compare) return 1; 203 else if(fptr == &val_neg_zone_compare) return 1; 204 else if(fptr == &probetree_cmp) return 1; 205 else if(fptr == &replay_var_compare) return 1; 206 return 0; 207 } 208 209 int 210 fptr_whitelist_hash_sizefunc(lruhash_sizefunc_t fptr) 211 { 212 if(fptr == &msgreply_sizefunc) return 1; 213 else if(fptr == &ub_rrset_sizefunc) return 1; 214 else if(fptr == &infra_sizefunc) return 1; 215 else if(fptr == &key_entry_sizefunc) return 1; 216 else if(fptr == &rate_sizefunc) return 1; 217 else if(fptr == &test_slabhash_sizefunc) return 1; 218 return 0; 219 } 220 221 int 222 fptr_whitelist_hash_compfunc(lruhash_compfunc_t fptr) 223 { 224 if(fptr == &query_info_compare) return 1; 225 else if(fptr == &ub_rrset_compare) return 1; 226 else if(fptr == &infra_compfunc) return 1; 227 else if(fptr == &key_entry_compfunc) return 1; 228 else if(fptr == &rate_compfunc) return 1; 229 else if(fptr == &test_slabhash_compfunc) return 1; 230 return 0; 231 } 232 233 int 234 fptr_whitelist_hash_delkeyfunc(lruhash_delkeyfunc_t fptr) 235 { 236 if(fptr == &query_entry_delete) return 1; 237 else if(fptr == &ub_rrset_key_delete) return 1; 238 else if(fptr == &infra_delkeyfunc) return 1; 239 else if(fptr == &key_entry_delkeyfunc) return 1; 240 else if(fptr == &rate_delkeyfunc) return 1; 241 else if(fptr == &test_slabhash_delkey) return 1; 242 return 0; 243 } 244 245 int 246 fptr_whitelist_hash_deldatafunc(lruhash_deldatafunc_t fptr) 247 { 248 if(fptr == &reply_info_delete) return 1; 249 else if(fptr == &rrset_data_delete) return 1; 250 else if(fptr == &infra_deldatafunc) return 1; 251 else if(fptr == &key_entry_deldatafunc) return 1; 252 else if(fptr == &rate_deldatafunc) return 1; 253 else if(fptr == &test_slabhash_deldata) return 1; 254 return 0; 255 } 256 257 int 258 fptr_whitelist_hash_markdelfunc(lruhash_markdelfunc_t fptr) 259 { 260 if(fptr == NULL) return 1; 261 else if(fptr == &rrset_markdel) return 1; 262 return 0; 263 } 264 265 /** whitelist env->send_query callbacks */ 266 int 267 fptr_whitelist_modenv_send_query(struct outbound_entry* (*fptr)( 268 uint8_t* qname, size_t qnamelen, uint16_t qtype, uint16_t qclass, 269 uint16_t flags, int dnssec, int want_dnssec, int nocaps, 270 struct edns_option* opt_list, struct sockaddr_storage* addr, 271 socklen_t addrlen, uint8_t* zone, size_t zonelen, 272 struct module_qstate* q)) 273 { 274 if(fptr == &worker_send_query) return 1; 275 else if(fptr == &libworker_send_query) return 1; 276 return 0; 277 } 278 279 int 280 fptr_whitelist_modenv_detach_subs(void (*fptr)( 281 struct module_qstate* qstate)) 282 { 283 if(fptr == &mesh_detach_subs) return 1; 284 return 0; 285 } 286 287 int 288 fptr_whitelist_modenv_attach_sub(int (*fptr)( 289 struct module_qstate* qstate, struct query_info* qinfo, 290 uint16_t qflags, int prime, int valrec, struct module_qstate** newq)) 291 { 292 if(fptr == &mesh_attach_sub) return 1; 293 return 0; 294 } 295 296 int 297 fptr_whitelist_modenv_kill_sub(void (*fptr)(struct module_qstate* newq)) 298 { 299 if(fptr == &mesh_state_delete) return 1; 300 return 0; 301 } 302 303 int 304 fptr_whitelist_modenv_detect_cycle(int (*fptr)( 305 struct module_qstate* qstate, struct query_info* qinfo, 306 uint16_t flags, int prime, int valrec)) 307 { 308 if(fptr == &mesh_detect_cycle) return 1; 309 return 0; 310 } 311 312 int 313 fptr_whitelist_mod_init(int (*fptr)(struct module_env* env, int id)) 314 { 315 if(fptr == &iter_init) return 1; 316 else if(fptr == &val_init) return 1; 317 else if(fptr == &dns64_init) return 1; 318 #ifdef WITH_PYTHONMODULE 319 else if(fptr == &pythonmod_init) return 1; 320 #endif 321 #ifdef USE_CACHEDB 322 else if(fptr == &cachedb_init) return 1; 323 #endif 324 return 0; 325 } 326 327 int 328 fptr_whitelist_mod_deinit(void (*fptr)(struct module_env* env, int id)) 329 { 330 if(fptr == &iter_deinit) return 1; 331 else if(fptr == &val_deinit) return 1; 332 else if(fptr == &dns64_deinit) return 1; 333 #ifdef WITH_PYTHONMODULE 334 else if(fptr == &pythonmod_deinit) return 1; 335 #endif 336 #ifdef USE_CACHEDB 337 else if(fptr == &cachedb_deinit) return 1; 338 #endif 339 return 0; 340 } 341 342 int 343 fptr_whitelist_mod_operate(void (*fptr)(struct module_qstate* qstate, 344 enum module_ev event, int id, struct outbound_entry* outbound)) 345 { 346 if(fptr == &iter_operate) return 1; 347 else if(fptr == &val_operate) return 1; 348 else if(fptr == &dns64_operate) return 1; 349 #ifdef WITH_PYTHONMODULE 350 else if(fptr == &pythonmod_operate) return 1; 351 #endif 352 #ifdef USE_CACHEDB 353 else if(fptr == &cachedb_operate) return 1; 354 #endif 355 return 0; 356 } 357 358 int 359 fptr_whitelist_mod_inform_super(void (*fptr)( 360 struct module_qstate* qstate, int id, struct module_qstate* super)) 361 { 362 if(fptr == &iter_inform_super) return 1; 363 else if(fptr == &val_inform_super) return 1; 364 else if(fptr == &dns64_inform_super) return 1; 365 #ifdef WITH_PYTHONMODULE 366 else if(fptr == &pythonmod_inform_super) return 1; 367 #endif 368 #ifdef USE_CACHEDB 369 else if(fptr == &cachedb_inform_super) return 1; 370 #endif 371 return 0; 372 } 373 374 int 375 fptr_whitelist_mod_clear(void (*fptr)(struct module_qstate* qstate, 376 int id)) 377 { 378 if(fptr == &iter_clear) return 1; 379 else if(fptr == &val_clear) return 1; 380 else if(fptr == &dns64_clear) return 1; 381 #ifdef WITH_PYTHONMODULE 382 else if(fptr == &pythonmod_clear) return 1; 383 #endif 384 #ifdef USE_CACHEDB 385 else if(fptr == &cachedb_clear) return 1; 386 #endif 387 return 0; 388 } 389 390 int 391 fptr_whitelist_mod_get_mem(size_t (*fptr)(struct module_env* env, int id)) 392 { 393 if(fptr == &iter_get_mem) return 1; 394 else if(fptr == &val_get_mem) return 1; 395 else if(fptr == &dns64_get_mem) return 1; 396 #ifdef WITH_PYTHONMODULE 397 else if(fptr == &pythonmod_get_mem) return 1; 398 #endif 399 #ifdef USE_CACHEDB 400 else if(fptr == &cachedb_get_mem) return 1; 401 #endif 402 return 0; 403 } 404 405 int 406 fptr_whitelist_alloc_cleanup(void (*fptr)(void*)) 407 { 408 if(fptr == &worker_alloc_cleanup) return 1; 409 return 0; 410 } 411 412 int fptr_whitelist_tube_listen(tube_callback_t* fptr) 413 { 414 if(fptr == &worker_handle_control_cmd) return 1; 415 else if(fptr == &libworker_handle_control_cmd) return 1; 416 return 0; 417 } 418 419 int fptr_whitelist_mesh_cb(mesh_cb_func_t fptr) 420 { 421 if(fptr == &libworker_fg_done_cb) return 1; 422 else if(fptr == &libworker_bg_done_cb) return 1; 423 else if(fptr == &libworker_event_done_cb) return 1; 424 else if(fptr == &probe_answer_cb) return 1; 425 return 0; 426 } 427 428 int fptr_whitelist_print_func(void (*fptr)(char*,void*)) 429 { 430 if(fptr == &config_print_func) return 1; 431 else if(fptr == &config_collate_func) return 1; 432 else if(fptr == &remote_get_opt_ssl) return 1; 433 return 0; 434 } 435