unbound/util/fptr_wlist.c

   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
  82 int
  83 fptr_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
  92 int
  93 fptr_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
 102 int
 103 fptr_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
 116 int
 117 fptr_whitelist_comm_signal(void (*fptr)(int, void*))
 118 {
 119         if(fptr == &worker_sighandler) return 1;
 120         return 0;
 121 }
 122
 123 int fptr_whitelist_start_accept(void (*fptr)(void*))
 124 {
 125         if(fptr == &worker_start_accept) return 1;
 126         return 0;
 127 }
 128
 129 int fptr_whitelist_stop_accept(void (*fptr)(void*))
 130 {
 131         if(fptr == &worker_stop_accept) return 1;
 132         return 0;
 133 }
 134
 135 int
 136 fptr_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
 154 int
 155 fptr_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
 163 int
 164 fptr_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
 172 int
 173 fptr_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
 180 int
 181 fptr_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
 206 int
 207 fptr_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
 217 int
 218 fptr_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
 228 int
 229 fptr_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
 239 int
 240 fptr_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
 250 int
 251 fptr_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 */
 259 int
 260 fptr_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
 272 int
 273 fptr_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
 280 int
 281 fptr_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
 289 int
 290 fptr_whitelist_modenv_kill_sub(void (*fptr)(struct module_qstate* newq))
 291 {
 292         if(fptr == &mesh_state_delete) return 1;
 293         return 0;
 294 }
 295
 296 int
 297 fptr_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
 305 int
 306 fptr_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
 317 int
 318 fptr_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
 329 int
 330 fptr_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
 342 int
 343 fptr_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
 355 int
 356 fptr_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
 368 int
 369 fptr_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
 380 int
 381 fptr_whitelist_alloc_cleanup(void (*fptr)(void*))
 382 {
 383         if(fptr == &worker_alloc_cleanup) return 1;
 384         return 0;
 385 }
 386
 387 int 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
 394 int 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
 403 int 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 }