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 LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE 27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * 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 "iterator/iterator.h" 55 #include "iterator/iter_fwd.h" 56 #include "validator/validator.h" 57 #include "validator/val_anchor.h" 58 #include "validator/val_nsec3.h" 59 #include "validator/val_sigcrypt.h" 60 #include "validator/val_kentry.h" 61 #include "validator/val_neg.h" 62 #include "validator/autotrust.h" 63 #include "util/data/msgreply.h" 64 #include "util/data/packed_rrset.h" 65 #include "util/storage/slabhash.h" 66 #include "util/storage/dnstree.h" 67 #include "util/locks.h" 68 #include "libunbound/libworker.h" 69 #include "libunbound/context.h" 70 #include "libunbound/worker.h" 71 #include "util/tube.h" 72 #include "util/config_file.h" 73 #ifdef UB_ON_WINDOWS 74 #include "winrc/win_svc.h" 75 #endif 76 77 #ifdef WITH_PYTHONMODULE 78 #include "pythonmod/pythonmod.h" 79 #endif 80 81 int 82 fptr_whitelist_comm_point(comm_point_callback_t *fptr) 83 { 84 if(fptr == &worker_handle_request) return 1; 85 else if(fptr == &outnet_udp_cb) return 1; 86 else if(fptr == &outnet_tcp_cb) return 1; 87 else if(fptr == &tube_handle_listen) return 1; 88 return 0; 89 } 90 91 int 92 fptr_whitelist_comm_point_raw(comm_point_callback_t *fptr) 93 { 94 if(fptr == &tube_handle_listen) return 1; 95 else if(fptr == &tube_handle_write) return 1; 96 else if(fptr == &remote_accept_callback) return 1; 97 else if(fptr == &remote_control_callback) return 1; 98 return 0; 99 } 100 101 int 102 fptr_whitelist_comm_timer(void (*fptr)(void*)) 103 { 104 if(fptr == &pending_udp_timer_cb) return 1; 105 else if(fptr == &outnet_tcptimer) return 1; 106 else if(fptr == &worker_stat_timer_cb) return 1; 107 else if(fptr == &worker_probe_timer_cb) return 1; 108 #ifdef UB_ON_WINDOWS 109 else if(fptr == &wsvc_cron_cb) return 1; 110 #endif 111 return 0; 112 } 113 114 int 115 fptr_whitelist_comm_signal(void (*fptr)(int, void*)) 116 { 117 if(fptr == &worker_sighandler) return 1; 118 return 0; 119 } 120 121 int fptr_whitelist_start_accept(void (*fptr)(void*)) 122 { 123 if(fptr == &worker_start_accept) return 1; 124 return 0; 125 } 126 127 int fptr_whitelist_stop_accept(void (*fptr)(void*)) 128 { 129 if(fptr == &worker_stop_accept) return 1; 130 return 0; 131 } 132 133 int 134 fptr_whitelist_event(void (*fptr)(int, short, void *)) 135 { 136 if(fptr == &comm_point_udp_callback) return 1; 137 else if(fptr == &comm_point_udp_ancil_callback) return 1; 138 else if(fptr == &comm_point_tcp_accept_callback) return 1; 139 else if(fptr == &comm_point_tcp_handle_callback) return 1; 140 else if(fptr == &comm_timer_callback) return 1; 141 else if(fptr == &comm_signal_callback) return 1; 142 else if(fptr == &comm_point_local_handle_callback) return 1; 143 else if(fptr == &comm_point_raw_handle_callback) return 1; 144 else if(fptr == &tube_handle_signal) return 1; 145 else if(fptr == &comm_base_handle_slow_accept) return 1; 146 #ifdef UB_ON_WINDOWS 147 else if(fptr == &worker_win_stop_cb) return 1; 148 #endif 149 return 0; 150 } 151 152 int 153 fptr_whitelist_pending_udp(comm_point_callback_t *fptr) 154 { 155 if(fptr == &serviced_udp_callback) return 1; 156 else if(fptr == &worker_handle_reply) return 1; 157 else if(fptr == &libworker_handle_reply) return 1; 158 return 0; 159 } 160 161 int 162 fptr_whitelist_pending_tcp(comm_point_callback_t *fptr) 163 { 164 if(fptr == &serviced_tcp_callback) return 1; 165 else if(fptr == &worker_handle_reply) return 1; 166 else if(fptr == &libworker_handle_reply) return 1; 167 return 0; 168 } 169 170 int 171 fptr_whitelist_serviced_query(comm_point_callback_t *fptr) 172 { 173 if(fptr == &worker_handle_service_reply) return 1; 174 else if(fptr == &libworker_handle_service_reply) return 1; 175 return 0; 176 } 177 178 int 179 fptr_whitelist_rbtree_cmp(int (*fptr) (const void *, const void *)) 180 { 181 if(fptr == &mesh_state_compare) return 1; 182 else if(fptr == &mesh_state_ref_compare) return 1; 183 else if(fptr == &addr_tree_compare) return 1; 184 else if(fptr == &local_zone_cmp) return 1; 185 else if(fptr == &local_data_cmp) return 1; 186 else if(fptr == &fwd_cmp) return 1; 187 else if(fptr == &pending_cmp) return 1; 188 else if(fptr == &serviced_cmp) return 1; 189 else if(fptr == &name_tree_compare) return 1; 190 else if(fptr == &order_lock_cmp) return 1; 191 else if(fptr == &codeline_cmp) return 1; 192 else if(fptr == &nsec3_hash_cmp) return 1; 193 else if(fptr == &mini_ev_cmp) return 1; 194 else if(fptr == &anchor_cmp) return 1; 195 else if(fptr == &canonical_tree_compare) return 1; 196 else if(fptr == &context_query_cmp) return 1; 197 else if(fptr == &val_neg_data_compare) return 1; 198 else if(fptr == &val_neg_zone_compare) return 1; 199 else if(fptr == &probetree_cmp) return 1; 200 else if(fptr == &replay_var_compare) return 1; 201 return 0; 202 } 203 204 int 205 fptr_whitelist_hash_sizefunc(lruhash_sizefunc_t fptr) 206 { 207 if(fptr == &msgreply_sizefunc) return 1; 208 else if(fptr == &ub_rrset_sizefunc) return 1; 209 else if(fptr == &infra_sizefunc) return 1; 210 else if(fptr == &key_entry_sizefunc) return 1; 211 else if(fptr == &test_slabhash_sizefunc) return 1; 212 return 0; 213 } 214 215 int 216 fptr_whitelist_hash_compfunc(lruhash_compfunc_t fptr) 217 { 218 if(fptr == &query_info_compare) return 1; 219 else if(fptr == &ub_rrset_compare) return 1; 220 else if(fptr == &infra_compfunc) return 1; 221 else if(fptr == &key_entry_compfunc) return 1; 222 else if(fptr == &test_slabhash_compfunc) return 1; 223 return 0; 224 } 225 226 int 227 fptr_whitelist_hash_delkeyfunc(lruhash_delkeyfunc_t fptr) 228 { 229 if(fptr == &query_entry_delete) return 1; 230 else if(fptr == &ub_rrset_key_delete) return 1; 231 else if(fptr == &infra_delkeyfunc) return 1; 232 else if(fptr == &key_entry_delkeyfunc) return 1; 233 else if(fptr == &test_slabhash_delkey) return 1; 234 return 0; 235 } 236 237 int 238 fptr_whitelist_hash_deldatafunc(lruhash_deldatafunc_t fptr) 239 { 240 if(fptr == &reply_info_delete) return 1; 241 else if(fptr == &rrset_data_delete) return 1; 242 else if(fptr == &infra_deldatafunc) return 1; 243 else if(fptr == &key_entry_deldatafunc) return 1; 244 else if(fptr == &test_slabhash_deldata) return 1; 245 return 0; 246 } 247 248 int 249 fptr_whitelist_hash_markdelfunc(lruhash_markdelfunc_t fptr) 250 { 251 if(fptr == NULL) return 1; 252 else if(fptr == &rrset_markdel) return 1; 253 return 0; 254 } 255 256 /** whitelist env->send_query callbacks */ 257 int 258 fptr_whitelist_modenv_send_query(struct outbound_entry* (*fptr)( 259 uint8_t* qname, size_t qnamelen, uint16_t qtype, uint16_t qclass, 260 uint16_t flags, int dnssec, int want_dnssec, 261 struct sockaddr_storage* addr, socklen_t addrlen, 262 uint8_t* zone, size_t zonelen, 263 struct module_qstate* q)) 264 { 265 if(fptr == &worker_send_query) return 1; 266 else if(fptr == &libworker_send_query) return 1; 267 return 0; 268 } 269 270 int 271 fptr_whitelist_modenv_detach_subs(void (*fptr)( 272 struct module_qstate* qstate)) 273 { 274 if(fptr == &mesh_detach_subs) return 1; 275 return 0; 276 } 277 278 int 279 fptr_whitelist_modenv_attach_sub(int (*fptr)( 280 struct module_qstate* qstate, struct query_info* qinfo, 281 uint16_t qflags, int prime, struct module_qstate** newq)) 282 { 283 if(fptr == &mesh_attach_sub) return 1; 284 return 0; 285 } 286 287 int 288 fptr_whitelist_modenv_kill_sub(void (*fptr)(struct module_qstate* newq)) 289 { 290 if(fptr == &mesh_state_delete) return 1; 291 return 0; 292 } 293 294 int 295 fptr_whitelist_modenv_detect_cycle(int (*fptr)( 296 struct module_qstate* qstate, struct query_info* qinfo, 297 uint16_t flags, int prime)) 298 { 299 if(fptr == &mesh_detect_cycle) return 1; 300 return 0; 301 } 302 303 int 304 fptr_whitelist_mod_init(int (*fptr)(struct module_env* env, int id)) 305 { 306 if(fptr == &iter_init) return 1; 307 else if(fptr == &val_init) return 1; 308 #ifdef WITH_PYTHONMODULE 309 else if(fptr == &pythonmod_init) return 1; 310 #endif 311 return 0; 312 } 313 314 int 315 fptr_whitelist_mod_deinit(void (*fptr)(struct module_env* env, int id)) 316 { 317 if(fptr == &iter_deinit) return 1; 318 else if(fptr == &val_deinit) return 1; 319 #ifdef WITH_PYTHONMODULE 320 else if(fptr == &pythonmod_deinit) return 1; 321 #endif 322 return 0; 323 } 324 325 int 326 fptr_whitelist_mod_operate(void (*fptr)(struct module_qstate* qstate, 327 enum module_ev event, int id, struct outbound_entry* outbound)) 328 { 329 if(fptr == &iter_operate) return 1; 330 else if(fptr == &val_operate) return 1; 331 #ifdef WITH_PYTHONMODULE 332 else if(fptr == &pythonmod_operate) return 1; 333 #endif 334 return 0; 335 } 336 337 int 338 fptr_whitelist_mod_inform_super(void (*fptr)( 339 struct module_qstate* qstate, int id, struct module_qstate* super)) 340 { 341 if(fptr == &iter_inform_super) return 1; 342 else if(fptr == &val_inform_super) return 1; 343 #ifdef WITH_PYTHONMODULE 344 else if(fptr == &pythonmod_inform_super) return 1; 345 #endif 346 return 0; 347 } 348 349 int 350 fptr_whitelist_mod_clear(void (*fptr)(struct module_qstate* qstate, 351 int id)) 352 { 353 if(fptr == &iter_clear) return 1; 354 else if(fptr == &val_clear) return 1; 355 #ifdef WITH_PYTHONMODULE 356 else if(fptr == &pythonmod_clear) return 1; 357 #endif 358 return 0; 359 } 360 361 int 362 fptr_whitelist_mod_get_mem(size_t (*fptr)(struct module_env* env, int id)) 363 { 364 if(fptr == &iter_get_mem) return 1; 365 else if(fptr == &val_get_mem) return 1; 366 #ifdef WITH_PYTHONMODULE 367 else if(fptr == &pythonmod_get_mem) return 1; 368 #endif 369 return 0; 370 } 371 372 int 373 fptr_whitelist_alloc_cleanup(void (*fptr)(void*)) 374 { 375 if(fptr == &worker_alloc_cleanup) return 1; 376 return 0; 377 } 378 379 int fptr_whitelist_tube_listen(tube_callback_t* fptr) 380 { 381 if(fptr == &worker_handle_control_cmd) return 1; 382 else if(fptr == &libworker_handle_control_cmd) return 1; 383 return 0; 384 } 385 386 int fptr_whitelist_mesh_cb(mesh_cb_func_t fptr) 387 { 388 if(fptr == &libworker_fg_done_cb) return 1; 389 else if(fptr == &libworker_bg_done_cb) return 1; 390 else if(fptr == &probe_answer_cb) return 1; 391 return 0; 392 } 393 394 int fptr_whitelist_print_func(void (*fptr)(char*,void*)) 395 { 396 if(fptr == &config_print_func) return 1; 397 else if(fptr == &config_collate_func) return 1; 398 else if(fptr == &remote_get_opt_ssl) return 1; 399 return 0; 400 } 401