fptr_wlist.c revision 269257
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 "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 81int 82fptr_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 91int 92fptr_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 101int 102fptr_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 == &pending_udp_timer_delay_cb) return 1; 107 else if(fptr == &worker_stat_timer_cb) return 1; 108 else if(fptr == &worker_probe_timer_cb) return 1; 109#ifdef UB_ON_WINDOWS 110 else if(fptr == &wsvc_cron_cb) return 1; 111#endif 112 return 0; 113} 114 115int 116fptr_whitelist_comm_signal(void (*fptr)(int, void*)) 117{ 118 if(fptr == &worker_sighandler) return 1; 119 return 0; 120} 121 122int fptr_whitelist_start_accept(void (*fptr)(void*)) 123{ 124 if(fptr == &worker_start_accept) return 1; 125 return 0; 126} 127 128int fptr_whitelist_stop_accept(void (*fptr)(void*)) 129{ 130 if(fptr == &worker_stop_accept) return 1; 131 return 0; 132} 133 134int 135fptr_whitelist_event(void (*fptr)(int, short, void *)) 136{ 137 if(fptr == &comm_point_udp_callback) return 1; 138 else if(fptr == &comm_point_udp_ancil_callback) return 1; 139 else if(fptr == &comm_point_tcp_accept_callback) return 1; 140 else if(fptr == &comm_point_tcp_handle_callback) return 1; 141 else if(fptr == &comm_timer_callback) return 1; 142 else if(fptr == &comm_signal_callback) return 1; 143 else if(fptr == &comm_point_local_handle_callback) return 1; 144 else if(fptr == &comm_point_raw_handle_callback) return 1; 145 else if(fptr == &tube_handle_signal) return 1; 146 else if(fptr == &comm_base_handle_slow_accept) return 1; 147#ifdef UB_ON_WINDOWS 148 else if(fptr == &worker_win_stop_cb) return 1; 149#endif 150 return 0; 151} 152 153int 154fptr_whitelist_pending_udp(comm_point_callback_t *fptr) 155{ 156 if(fptr == &serviced_udp_callback) return 1; 157 else if(fptr == &worker_handle_reply) return 1; 158 else if(fptr == &libworker_handle_reply) return 1; 159 return 0; 160} 161 162int 163fptr_whitelist_pending_tcp(comm_point_callback_t *fptr) 164{ 165 if(fptr == &serviced_tcp_callback) return 1; 166 else if(fptr == &worker_handle_reply) return 1; 167 else if(fptr == &libworker_handle_reply) return 1; 168 return 0; 169} 170 171int 172fptr_whitelist_serviced_query(comm_point_callback_t *fptr) 173{ 174 if(fptr == &worker_handle_service_reply) return 1; 175 else if(fptr == &libworker_handle_service_reply) return 1; 176 return 0; 177} 178 179int 180fptr_whitelist_rbtree_cmp(int (*fptr) (const void *, const void *)) 181{ 182 if(fptr == &mesh_state_compare) return 1; 183 else if(fptr == &mesh_state_ref_compare) return 1; 184 else if(fptr == &addr_tree_compare) return 1; 185 else if(fptr == &local_zone_cmp) return 1; 186 else if(fptr == &local_data_cmp) return 1; 187 else if(fptr == &fwd_cmp) return 1; 188 else if(fptr == &pending_cmp) return 1; 189 else if(fptr == &serviced_cmp) return 1; 190 else if(fptr == &name_tree_compare) return 1; 191 else if(fptr == &order_lock_cmp) return 1; 192 else if(fptr == &codeline_cmp) return 1; 193 else if(fptr == &nsec3_hash_cmp) return 1; 194 else if(fptr == &mini_ev_cmp) return 1; 195 else if(fptr == &anchor_cmp) return 1; 196 else if(fptr == &canonical_tree_compare) return 1; 197 else if(fptr == &context_query_cmp) return 1; 198 else if(fptr == &val_neg_data_compare) return 1; 199 else if(fptr == &val_neg_zone_compare) return 1; 200 else if(fptr == &probetree_cmp) return 1; 201 else if(fptr == &replay_var_compare) return 1; 202 return 0; 203} 204 205int 206fptr_whitelist_hash_sizefunc(lruhash_sizefunc_t fptr) 207{ 208 if(fptr == &msgreply_sizefunc) return 1; 209 else if(fptr == &ub_rrset_sizefunc) return 1; 210 else if(fptr == &infra_sizefunc) return 1; 211 else if(fptr == &key_entry_sizefunc) return 1; 212 else if(fptr == &test_slabhash_sizefunc) return 1; 213 return 0; 214} 215 216int 217fptr_whitelist_hash_compfunc(lruhash_compfunc_t fptr) 218{ 219 if(fptr == &query_info_compare) return 1; 220 else if(fptr == &ub_rrset_compare) return 1; 221 else if(fptr == &infra_compfunc) return 1; 222 else if(fptr == &key_entry_compfunc) return 1; 223 else if(fptr == &test_slabhash_compfunc) return 1; 224 return 0; 225} 226 227int 228fptr_whitelist_hash_delkeyfunc(lruhash_delkeyfunc_t fptr) 229{ 230 if(fptr == &query_entry_delete) return 1; 231 else if(fptr == &ub_rrset_key_delete) return 1; 232 else if(fptr == &infra_delkeyfunc) return 1; 233 else if(fptr == &key_entry_delkeyfunc) return 1; 234 else if(fptr == &test_slabhash_delkey) return 1; 235 return 0; 236} 237 238int 239fptr_whitelist_hash_deldatafunc(lruhash_deldatafunc_t fptr) 240{ 241 if(fptr == &reply_info_delete) return 1; 242 else if(fptr == &rrset_data_delete) return 1; 243 else if(fptr == &infra_deldatafunc) return 1; 244 else if(fptr == &key_entry_deldatafunc) return 1; 245 else if(fptr == &test_slabhash_deldata) return 1; 246 return 0; 247} 248 249int 250fptr_whitelist_hash_markdelfunc(lruhash_markdelfunc_t fptr) 251{ 252 if(fptr == NULL) return 1; 253 else if(fptr == &rrset_markdel) return 1; 254 return 0; 255} 256 257/** whitelist env->send_query callbacks */ 258int 259fptr_whitelist_modenv_send_query(struct outbound_entry* (*fptr)( 260 uint8_t* qname, size_t qnamelen, uint16_t qtype, uint16_t qclass, 261 uint16_t flags, int dnssec, int want_dnssec, 262 struct sockaddr_storage* addr, socklen_t addrlen, 263 uint8_t* zone, size_t zonelen, 264 struct module_qstate* q)) 265{ 266 if(fptr == &worker_send_query) return 1; 267 else if(fptr == &libworker_send_query) return 1; 268 return 0; 269} 270 271int 272fptr_whitelist_modenv_detach_subs(void (*fptr)( 273 struct module_qstate* qstate)) 274{ 275 if(fptr == &mesh_detach_subs) return 1; 276 return 0; 277} 278 279int 280fptr_whitelist_modenv_attach_sub(int (*fptr)( 281 struct module_qstate* qstate, struct query_info* qinfo, 282 uint16_t qflags, int prime, struct module_qstate** newq)) 283{ 284 if(fptr == &mesh_attach_sub) return 1; 285 return 0; 286} 287 288int 289fptr_whitelist_modenv_kill_sub(void (*fptr)(struct module_qstate* newq)) 290{ 291 if(fptr == &mesh_state_delete) return 1; 292 return 0; 293} 294 295int 296fptr_whitelist_modenv_detect_cycle(int (*fptr)( 297 struct module_qstate* qstate, struct query_info* qinfo, 298 uint16_t flags, int prime)) 299{ 300 if(fptr == &mesh_detect_cycle) return 1; 301 return 0; 302} 303 304int 305fptr_whitelist_mod_init(int (*fptr)(struct module_env* env, int id)) 306{ 307 if(fptr == &iter_init) return 1; 308 else if(fptr == &val_init) return 1; 309#ifdef WITH_PYTHONMODULE 310 else if(fptr == &pythonmod_init) return 1; 311#endif 312 return 0; 313} 314 315int 316fptr_whitelist_mod_deinit(void (*fptr)(struct module_env* env, int id)) 317{ 318 if(fptr == &iter_deinit) return 1; 319 else if(fptr == &val_deinit) return 1; 320#ifdef WITH_PYTHONMODULE 321 else if(fptr == &pythonmod_deinit) return 1; 322#endif 323 return 0; 324} 325 326int 327fptr_whitelist_mod_operate(void (*fptr)(struct module_qstate* qstate, 328 enum module_ev event, int id, struct outbound_entry* outbound)) 329{ 330 if(fptr == &iter_operate) return 1; 331 else if(fptr == &val_operate) return 1; 332#ifdef WITH_PYTHONMODULE 333 else if(fptr == &pythonmod_operate) return 1; 334#endif 335 return 0; 336} 337 338int 339fptr_whitelist_mod_inform_super(void (*fptr)( 340 struct module_qstate* qstate, int id, struct module_qstate* super)) 341{ 342 if(fptr == &iter_inform_super) return 1; 343 else if(fptr == &val_inform_super) return 1; 344#ifdef WITH_PYTHONMODULE 345 else if(fptr == &pythonmod_inform_super) return 1; 346#endif 347 return 0; 348} 349 350int 351fptr_whitelist_mod_clear(void (*fptr)(struct module_qstate* qstate, 352 int id)) 353{ 354 if(fptr == &iter_clear) return 1; 355 else if(fptr == &val_clear) return 1; 356#ifdef WITH_PYTHONMODULE 357 else if(fptr == &pythonmod_clear) return 1; 358#endif 359 return 0; 360} 361 362int 363fptr_whitelist_mod_get_mem(size_t (*fptr)(struct module_env* env, int id)) 364{ 365 if(fptr == &iter_get_mem) return 1; 366 else if(fptr == &val_get_mem) return 1; 367#ifdef WITH_PYTHONMODULE 368 else if(fptr == &pythonmod_get_mem) return 1; 369#endif 370 return 0; 371} 372 373int 374fptr_whitelist_alloc_cleanup(void (*fptr)(void*)) 375{ 376 if(fptr == &worker_alloc_cleanup) return 1; 377 return 0; 378} 379 380int fptr_whitelist_tube_listen(tube_callback_t* fptr) 381{ 382 if(fptr == &worker_handle_control_cmd) return 1; 383 else if(fptr == &libworker_handle_control_cmd) return 1; 384 return 0; 385} 386 387int fptr_whitelist_mesh_cb(mesh_cb_func_t fptr) 388{ 389 if(fptr == &libworker_fg_done_cb) return 1; 390 else if(fptr == &libworker_bg_done_cb) return 1; 391 else if(fptr == &libworker_event_done_cb) return 1; 392 else if(fptr == &probe_answer_cb) return 1; 393 return 0; 394} 395 396int fptr_whitelist_print_func(void (*fptr)(char*,void*)) 397{ 398 if(fptr == &config_print_func) return 1; 399 else if(fptr == &config_collate_func) return 1; 400 else if(fptr == &remote_get_opt_ssl) return 1; 401 return 0; 402} 403