fptr_wlist.c revision 285206
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 82int 83fptr_whitelist_comm_point(comm_point_callback_t *fptr) 84{ 85 if(fptr == &worker_handle_request) return 1; 86 else if(fptr == &outnet_udp_cb) return 1; 87 else if(fptr == &outnet_tcp_cb) return 1; 88 else if(fptr == &tube_handle_listen) return 1; 89 return 0; 90} 91 92int 93fptr_whitelist_comm_point_raw(comm_point_callback_t *fptr) 94{ 95 if(fptr == &tube_handle_listen) return 1; 96 else if(fptr == &tube_handle_write) return 1; 97 else if(fptr == &remote_accept_callback) return 1; 98 else if(fptr == &remote_control_callback) return 1; 99 return 0; 100} 101 102int 103fptr_whitelist_comm_timer(void (*fptr)(void*)) 104{ 105 if(fptr == &pending_udp_timer_cb) return 1; 106 else if(fptr == &outnet_tcptimer) return 1; 107 else if(fptr == &pending_udp_timer_delay_cb) return 1; 108 else if(fptr == &worker_stat_timer_cb) return 1; 109 else if(fptr == &worker_probe_timer_cb) return 1; 110#ifdef UB_ON_WINDOWS 111 else if(fptr == &wsvc_cron_cb) return 1; 112#endif 113 return 0; 114} 115 116int 117fptr_whitelist_comm_signal(void (*fptr)(int, void*)) 118{ 119 if(fptr == &worker_sighandler) return 1; 120 return 0; 121} 122 123int fptr_whitelist_start_accept(void (*fptr)(void*)) 124{ 125 if(fptr == &worker_start_accept) return 1; 126 return 0; 127} 128 129int fptr_whitelist_stop_accept(void (*fptr)(void*)) 130{ 131 if(fptr == &worker_stop_accept) return 1; 132 return 0; 133} 134 135int 136fptr_whitelist_event(void (*fptr)(int, short, void *)) 137{ 138 if(fptr == &comm_point_udp_callback) return 1; 139 else if(fptr == &comm_point_udp_ancil_callback) return 1; 140 else if(fptr == &comm_point_tcp_accept_callback) return 1; 141 else if(fptr == &comm_point_tcp_handle_callback) return 1; 142 else if(fptr == &comm_timer_callback) return 1; 143 else if(fptr == &comm_signal_callback) return 1; 144 else if(fptr == &comm_point_local_handle_callback) return 1; 145 else if(fptr == &comm_point_raw_handle_callback) return 1; 146 else if(fptr == &tube_handle_signal) return 1; 147 else if(fptr == &comm_base_handle_slow_accept) return 1; 148#ifdef UB_ON_WINDOWS 149 else if(fptr == &worker_win_stop_cb) return 1; 150#endif 151 return 0; 152} 153 154int 155fptr_whitelist_pending_udp(comm_point_callback_t *fptr) 156{ 157 if(fptr == &serviced_udp_callback) return 1; 158 else if(fptr == &worker_handle_reply) return 1; 159 else if(fptr == &libworker_handle_reply) return 1; 160 return 0; 161} 162 163int 164fptr_whitelist_pending_tcp(comm_point_callback_t *fptr) 165{ 166 if(fptr == &serviced_tcp_callback) return 1; 167 else if(fptr == &worker_handle_reply) return 1; 168 else if(fptr == &libworker_handle_reply) return 1; 169 return 0; 170} 171 172int 173fptr_whitelist_serviced_query(comm_point_callback_t *fptr) 174{ 175 if(fptr == &worker_handle_service_reply) return 1; 176 else if(fptr == &libworker_handle_service_reply) return 1; 177 return 0; 178} 179 180int 181fptr_whitelist_rbtree_cmp(int (*fptr) (const void *, const void *)) 182{ 183 if(fptr == &mesh_state_compare) return 1; 184 else if(fptr == &mesh_state_ref_compare) return 1; 185 else if(fptr == &addr_tree_compare) return 1; 186 else if(fptr == &local_zone_cmp) return 1; 187 else if(fptr == &local_data_cmp) return 1; 188 else if(fptr == &fwd_cmp) return 1; 189 else if(fptr == &pending_cmp) return 1; 190 else if(fptr == &serviced_cmp) return 1; 191 else if(fptr == &name_tree_compare) return 1; 192 else if(fptr == &order_lock_cmp) return 1; 193 else if(fptr == &codeline_cmp) return 1; 194 else if(fptr == &nsec3_hash_cmp) return 1; 195 else if(fptr == &mini_ev_cmp) return 1; 196 else if(fptr == &anchor_cmp) return 1; 197 else if(fptr == &canonical_tree_compare) return 1; 198 else if(fptr == &context_query_cmp) return 1; 199 else if(fptr == &val_neg_data_compare) return 1; 200 else if(fptr == &val_neg_zone_compare) return 1; 201 else if(fptr == &probetree_cmp) return 1; 202 else if(fptr == &replay_var_compare) return 1; 203 return 0; 204} 205 206int 207fptr_whitelist_hash_sizefunc(lruhash_sizefunc_t fptr) 208{ 209 if(fptr == &msgreply_sizefunc) return 1; 210 else if(fptr == &ub_rrset_sizefunc) return 1; 211 else if(fptr == &infra_sizefunc) return 1; 212 else if(fptr == &key_entry_sizefunc) return 1; 213 else if(fptr == &test_slabhash_sizefunc) return 1; 214 return 0; 215} 216 217int 218fptr_whitelist_hash_compfunc(lruhash_compfunc_t fptr) 219{ 220 if(fptr == &query_info_compare) return 1; 221 else if(fptr == &ub_rrset_compare) return 1; 222 else if(fptr == &infra_compfunc) return 1; 223 else if(fptr == &key_entry_compfunc) return 1; 224 else if(fptr == &test_slabhash_compfunc) return 1; 225 return 0; 226} 227 228int 229fptr_whitelist_hash_delkeyfunc(lruhash_delkeyfunc_t fptr) 230{ 231 if(fptr == &query_entry_delete) return 1; 232 else if(fptr == &ub_rrset_key_delete) return 1; 233 else if(fptr == &infra_delkeyfunc) return 1; 234 else if(fptr == &key_entry_delkeyfunc) return 1; 235 else if(fptr == &test_slabhash_delkey) return 1; 236 return 0; 237} 238 239int 240fptr_whitelist_hash_deldatafunc(lruhash_deldatafunc_t fptr) 241{ 242 if(fptr == &reply_info_delete) return 1; 243 else if(fptr == &rrset_data_delete) return 1; 244 else if(fptr == &infra_deldatafunc) return 1; 245 else if(fptr == &key_entry_deldatafunc) return 1; 246 else if(fptr == &test_slabhash_deldata) return 1; 247 return 0; 248} 249 250int 251fptr_whitelist_hash_markdelfunc(lruhash_markdelfunc_t fptr) 252{ 253 if(fptr == NULL) return 1; 254 else if(fptr == &rrset_markdel) return 1; 255 return 0; 256} 257 258/** whitelist env->send_query callbacks */ 259int 260fptr_whitelist_modenv_send_query(struct outbound_entry* (*fptr)( 261 uint8_t* qname, size_t qnamelen, uint16_t qtype, uint16_t qclass, 262 uint16_t flags, int dnssec, int want_dnssec, int nocaps, 263 struct sockaddr_storage* addr, socklen_t addrlen, 264 uint8_t* zone, size_t zonelen, 265 struct module_qstate* q)) 266{ 267 if(fptr == &worker_send_query) return 1; 268 else if(fptr == &libworker_send_query) return 1; 269 return 0; 270} 271 272int 273fptr_whitelist_modenv_detach_subs(void (*fptr)( 274 struct module_qstate* qstate)) 275{ 276 if(fptr == &mesh_detach_subs) return 1; 277 return 0; 278} 279 280int 281fptr_whitelist_modenv_attach_sub(int (*fptr)( 282 struct module_qstate* qstate, struct query_info* qinfo, 283 uint16_t qflags, int prime, int valrec, struct module_qstate** newq)) 284{ 285 if(fptr == &mesh_attach_sub) return 1; 286 return 0; 287} 288 289int 290fptr_whitelist_modenv_kill_sub(void (*fptr)(struct module_qstate* newq)) 291{ 292 if(fptr == &mesh_state_delete) return 1; 293 return 0; 294} 295 296int 297fptr_whitelist_modenv_detect_cycle(int (*fptr)( 298 struct module_qstate* qstate, struct query_info* qinfo, 299 uint16_t flags, int prime, int valrec)) 300{ 301 if(fptr == &mesh_detect_cycle) return 1; 302 return 0; 303} 304 305int 306fptr_whitelist_mod_init(int (*fptr)(struct module_env* env, int id)) 307{ 308 if(fptr == &iter_init) return 1; 309 else if(fptr == &val_init) return 1; 310 else if(fptr == &dns64_init) return 1; 311#ifdef WITH_PYTHONMODULE 312 else if(fptr == &pythonmod_init) return 1; 313#endif 314 return 0; 315} 316 317int 318fptr_whitelist_mod_deinit(void (*fptr)(struct module_env* env, int id)) 319{ 320 if(fptr == &iter_deinit) return 1; 321 else if(fptr == &val_deinit) return 1; 322 else if(fptr == &dns64_deinit) return 1; 323#ifdef WITH_PYTHONMODULE 324 else if(fptr == &pythonmod_deinit) return 1; 325#endif 326 return 0; 327} 328 329int 330fptr_whitelist_mod_operate(void (*fptr)(struct module_qstate* qstate, 331 enum module_ev event, int id, struct outbound_entry* outbound)) 332{ 333 if(fptr == &iter_operate) return 1; 334 else if(fptr == &val_operate) return 1; 335 else if(fptr == &dns64_operate) return 1; 336#ifdef WITH_PYTHONMODULE 337 else if(fptr == &pythonmod_operate) return 1; 338#endif 339 return 0; 340} 341 342int 343fptr_whitelist_mod_inform_super(void (*fptr)( 344 struct module_qstate* qstate, int id, struct module_qstate* super)) 345{ 346 if(fptr == &iter_inform_super) return 1; 347 else if(fptr == &val_inform_super) return 1; 348 else if(fptr == &dns64_inform_super) return 1; 349#ifdef WITH_PYTHONMODULE 350 else if(fptr == &pythonmod_inform_super) return 1; 351#endif 352 return 0; 353} 354 355int 356fptr_whitelist_mod_clear(void (*fptr)(struct module_qstate* qstate, 357 int id)) 358{ 359 if(fptr == &iter_clear) return 1; 360 else if(fptr == &val_clear) return 1; 361 else if(fptr == &dns64_clear) return 1; 362#ifdef WITH_PYTHONMODULE 363 else if(fptr == &pythonmod_clear) return 1; 364#endif 365 return 0; 366} 367 368int 369fptr_whitelist_mod_get_mem(size_t (*fptr)(struct module_env* env, int id)) 370{ 371 if(fptr == &iter_get_mem) return 1; 372 else if(fptr == &val_get_mem) return 1; 373 else if(fptr == &dns64_get_mem) return 1; 374#ifdef WITH_PYTHONMODULE 375 else if(fptr == &pythonmod_get_mem) return 1; 376#endif 377 return 0; 378} 379 380int 381fptr_whitelist_alloc_cleanup(void (*fptr)(void*)) 382{ 383 if(fptr == &worker_alloc_cleanup) return 1; 384 return 0; 385} 386 387int fptr_whitelist_tube_listen(tube_callback_t* fptr) 388{ 389 if(fptr == &worker_handle_control_cmd) return 1; 390 else if(fptr == &libworker_handle_control_cmd) return 1; 391 return 0; 392} 393 394int fptr_whitelist_mesh_cb(mesh_cb_func_t fptr) 395{ 396 if(fptr == &libworker_fg_done_cb) return 1; 397 else if(fptr == &libworker_bg_done_cb) return 1; 398 else if(fptr == &libworker_event_done_cb) return 1; 399 else if(fptr == &probe_answer_cb) return 1; 400 return 0; 401} 402 403int fptr_whitelist_print_func(void (*fptr)(char*,void*)) 404{ 405 if(fptr == &config_print_func) return 1; 406 else if(fptr == &config_collate_func) return 1; 407 else if(fptr == &remote_get_opt_ssl) return 1; 408 return 0; 409} 410