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 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 == &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 114int 115fptr_whitelist_comm_signal(void (*fptr)(int, void*)) 116{ 117 if(fptr == &worker_sighandler) return 1; 118 return 0; 119} 120 121int fptr_whitelist_start_accept(void (*fptr)(void*)) 122{ 123 if(fptr == &worker_start_accept) return 1; 124 return 0; 125} 126 127int fptr_whitelist_stop_accept(void (*fptr)(void*)) 128{ 129 if(fptr == &worker_stop_accept) return 1; 130 return 0; 131} 132 133int 134fptr_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 152int 153fptr_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 161int 162fptr_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 170int 171fptr_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 178int 179fptr_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 204int 205fptr_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 215int 216fptr_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 226int 227fptr_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 237int 238fptr_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 248int 249fptr_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 */ 257int 258fptr_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 270int 271fptr_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 278int 279fptr_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 287int 288fptr_whitelist_modenv_kill_sub(void (*fptr)(struct module_qstate* newq)) 289{ 290 if(fptr == &mesh_state_delete) return 1; 291 return 0; 292} 293 294int 295fptr_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 303int 304fptr_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 314int 315fptr_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 325int 326fptr_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 337int 338fptr_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 349int 350fptr_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 361int 362fptr_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 372int 373fptr_whitelist_alloc_cleanup(void (*fptr)(void*)) 374{ 375 if(fptr == &worker_alloc_cleanup) return 1; 376 return 0; 377} 378 379int 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 386int 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 394int 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