1 /* 2 * services/authzone.h - authoritative zone that is locally hosted. 3 * 4 * Copyright (c) 2017, 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 the functions for an authority zone. This zone 40 * is queried by the iterator, just like a stub or forward zone, but then 41 * the data is locally held. 42 */ 43 44 #ifndef SERVICES_AUTHZONE_H 45 #define SERVICES_AUTHZONE_H 46 #include "util/rbtree.h" 47 #include "util/locks.h" 48 #include "services/mesh.h" 49 #include "services/rpz.h" 50 struct ub_packed_rrset_key; 51 struct regional; 52 struct config_file; 53 struct config_auth; 54 struct query_info; 55 struct dns_msg; 56 struct edns_data; 57 struct module_env; 58 struct worker; 59 struct comm_point; 60 struct comm_timer; 61 struct comm_reply; 62 struct auth_rrset; 63 struct auth_nextprobe; 64 struct auth_probe; 65 struct auth_transfer; 66 struct auth_master; 67 struct auth_chunk; 68 69 /** 70 * Authoritative zones, shared. 71 */ 72 struct auth_zones { 73 /** lock on the authzone trees */ 74 lock_rw_type lock; 75 /** rbtree of struct auth_zone */ 76 rbtree_type ztree; 77 /** rbtree of struct auth_xfer */ 78 rbtree_type xtree; 79 /** do we have downstream enabled */ 80 int have_downstream; 81 /** number of queries upstream */ 82 size_t num_query_up; 83 /** number of queries downstream */ 84 size_t num_query_down; 85 /** first rpz item in linked list */ 86 struct rpz* rpz_first; 87 /** rw lock for rpz linked list, needed when iterating or editing linked 88 * list. */ 89 lock_rw_type rpz_lock; 90 }; 91 92 /** 93 * Auth zone. Authoritative data, that is fetched from instead of sending 94 * packets to the internet. 95 */ 96 struct auth_zone { 97 /** rbtree node, key is name and class */ 98 rbnode_type node; 99 100 /** zone name, in uncompressed wireformat */ 101 uint8_t* name; 102 /** length of zone name */ 103 size_t namelen; 104 /** number of labels in zone name */ 105 int namelabs; 106 /** the class of this zone, in host byteorder. 107 * uses 'dclass' to not conflict with c++ keyword class. */ 108 uint16_t dclass; 109 110 /** lock on the data in the structure 111 * For the node, parent, name, namelen, namelabs, dclass, you 112 * need to also hold the zones_tree lock to change them (or to 113 * delete this zone) */ 114 lock_rw_type lock; 115 116 /** auth data for this zone 117 * rbtree of struct auth_data */ 118 rbtree_type data; 119 120 /** zonefile name (or NULL for no zonefile) */ 121 char* zonefile; 122 /** fallback to the internet on failure or ttl-expiry of auth zone */ 123 int fallback_enabled; 124 /** the zone has expired (enabled by the xfer worker), fallback 125 * happens if that option is enabled. */ 126 int zone_expired; 127 /** zone is a slave zone (it has masters) */ 128 int zone_is_slave; 129 /** for downstream: this zone answers queries towards the downstream 130 * clients */ 131 int for_downstream; 132 /** for upstream: this zone answers queries that unbound intends to 133 * send upstream. */ 134 int for_upstream; 135 /** RPZ zones */ 136 struct rpz* rpz; 137 /** zone has been deleted */ 138 int zone_deleted; 139 /** deletelist pointer, unused normally except during delete */ 140 struct auth_zone* delete_next; 141 }; 142 143 /** 144 * Auth data. One domain name, and the RRs to go with it. 145 */ 146 struct auth_data { 147 /** rbtree node, key is name only */ 148 rbnode_type node; 149 /** domain name */ 150 uint8_t* name; 151 /** length of name */ 152 size_t namelen; 153 /** number of labels in name */ 154 int namelabs; 155 /** the data rrsets, with different types, linked list. 156 * if the list if NULL the node would be an empty non-terminal, 157 * but in this data structure such nodes that represent an empty 158 * non-terminal are not needed; they just don't exist. 159 */ 160 struct auth_rrset* rrsets; 161 }; 162 163 /** 164 * A auth data RRset 165 */ 166 struct auth_rrset { 167 /** next in list */ 168 struct auth_rrset* next; 169 /** RR type in host byteorder */ 170 uint16_t type; 171 /** RRset data item */ 172 struct packed_rrset_data* data; 173 }; 174 175 /** 176 * Authoritative zone transfer structure. 177 * Create and destroy needs the auth_zones* biglock. 178 * The structure consists of different tasks. Each can be unowned (-1) or 179 * owner by a worker (worker-num). A worker can pick up a task and then do 180 * it. This means the events (timeouts, sockets) are for that worker. 181 * 182 * (move this to tasks). 183 * They don't have locks themselves, the worker (that owns it) uses it, 184 * also as part of callbacks, hence it has separate zonename pointers for 185 * lookup in the main zonetree. If the zone has no transfers, this 186 * structure is not created. 187 */ 188 struct auth_xfer { 189 /** rbtree node, key is name and class */ 190 rbnode_type node; 191 192 /** lock on this structure, and on the workernum elements of the 193 * tasks. First hold the tree-lock in auth_zones, find the auth_xfer, 194 * lock this lock. Then a worker can reassign itself to fill up 195 * one of the tasks. 196 * Once it has the task assigned to it, the worker can access the 197 * other elements of the task structure without a lock, because that 198 * is necessary for the eventloop and callbacks from that. */ 199 lock_basic_type lock; 200 201 /** zone name, in uncompressed wireformat */ 202 uint8_t* name; 203 /** length of zone name */ 204 size_t namelen; 205 /** number of labels in zone name */ 206 int namelabs; 207 /** the class of this zone, in host byteorder. 208 * uses 'dclass' to not conflict with c++ keyword class. */ 209 uint16_t dclass; 210 211 /** task to wait for next-probe-timeout, 212 * once timeouted, see if a SOA probe is needed, or already 213 * in progress */ 214 struct auth_nextprobe* task_nextprobe; 215 216 /** task for SOA probe. Check if the zone can be updated */ 217 struct auth_probe* task_probe; 218 219 /** Task for transfer. Transferring and updating the zone. This 220 * includes trying (potentially) several upstream masters. Downloading 221 * and storing the zone */ 222 struct auth_transfer* task_transfer; 223 224 /** a notify was received, but a zone transfer or probe was already 225 * acted on. 226 * However, the zone transfer could signal a newer serial number. 227 * The serial number of that notify is saved below. The transfer and 228 * probe tasks should check this once done to see if they need to 229 * restart the transfer task for the newer notify serial. 230 * Hold the lock to access this member (and the serial). 231 */ 232 int notify_received; 233 /** true if the notify_received has a serial number */ 234 int notify_has_serial; 235 /** serial number of the notify */ 236 uint32_t notify_serial; 237 /** the list of masters for checking notifies. This list is 238 * empty on start, and a copy of the list from the probe_task when 239 * it is done looking them up. */ 240 struct auth_master* allow_notify_list; 241 242 /* protected by the lock on the structure, information about 243 * the loaded authority zone. */ 244 /** is the zone currently considered expired? after expiry also older 245 * serial numbers are allowed (not just newer) */ 246 int zone_expired; 247 /** do we have a zone (if 0, no zone data at all) */ 248 int have_zone; 249 250 /** current serial (from SOA), if we have no zone, 0 */ 251 uint32_t serial; 252 /** retry time (from SOA), time to wait with next_probe 253 * if no master responds */ 254 time_t retry; 255 /** refresh time (from SOA), time to wait with next_probe 256 * if everything is fine */ 257 time_t refresh; 258 /** expiry time (from SOA), time until zone data is not considered 259 * valid any more, if no master responds within this time, either 260 * with the current zone or a new zone. */ 261 time_t expiry; 262 263 /** zone lease start time (start+expiry is expiration time). 264 * this is renewed every SOA probe and transfer. On zone load 265 * from zonefile it is also set (with probe set soon to check) */ 266 time_t lease_time; 267 }; 268 269 /** 270 * The next probe task. 271 * This task consists of waiting for the probetimeout. It is a task because 272 * it needs an event in the eventtable. Once the timeout has passed, that 273 * worker can (potentially) become the auth_probe worker, or if another worker 274 * is already doing that, do nothing. Tasks becomes unowned. 275 * The probe worker, if it detects nothing has to be done picks up this task, 276 * if unowned. 277 */ 278 struct auth_nextprobe { 279 /* Worker pointer. NULL means unowned. */ 280 struct worker* worker; 281 /* module env for this task */ 282 struct module_env* env; 283 284 /** increasing backoff for failures */ 285 time_t backoff; 286 /** Timeout for next probe (for SOA) */ 287 time_t next_probe; 288 /** timeout callback for next_probe or expiry(if that is sooner). 289 * it is on the worker's event_base */ 290 struct comm_timer* timer; 291 }; 292 293 /** 294 * The probe task. 295 * Send a SOA UDP query to see if the zone needs to be updated (or similar, 296 * potential, HTTP probe query) and check serial number. 297 * If yes, start the auth_transfer task. If no, make sure auth_nextprobe 298 * timeout wait task is running. 299 * Needs to be a task, because the UDP query needs an event entry. 300 * This task could also be started by eg. a NOTIFY being received, even though 301 * another worker is performing the nextprobe task (and that worker keeps 302 * waiting uninterrupted). 303 */ 304 struct auth_probe { 305 /* Worker pointer. NULL means unowned. */ 306 struct worker* worker; 307 /* module env for this task */ 308 struct module_env* env; 309 310 /** list of upstream masters for this zone, from config */ 311 struct auth_master* masters; 312 313 /** for the hostname lookups, which master is current */ 314 struct auth_master* lookup_target; 315 /** are we looking up A or AAAA, first A, then AAAA (if ip6 enabled) */ 316 int lookup_aaaa; 317 /** we only want to do lookups for making config work (for notify), 318 * don't proceed with UDP SOA probe queries */ 319 int only_lookup; 320 /** we have seen a new lease this scan, because one of the masters 321 * replied with the current SOA serial version */ 322 int have_new_lease; 323 324 /** once notified, or the timeout has been reached. a scan starts. */ 325 /** the scan specific target (notify source), or NULL if none */ 326 struct auth_master* scan_specific; 327 /** scan tries all the upstream masters. the scan current target. 328 * or NULL if not working on sequential scan */ 329 struct auth_master* scan_target; 330 /** if not NULL, the specific addr for the current master */ 331 struct auth_addr* scan_addr; 332 333 /** dns id of packet in flight */ 334 uint16_t id; 335 /** the SOA probe udp event. 336 * on the workers event base. */ 337 struct comm_point* cp; 338 /** is the cp for ip6 or ip4 */ 339 int cp_is_ip6; 340 /** timeout for packets. 341 * on the workers event base. */ 342 struct comm_timer* timer; 343 /** timeout in msec */ 344 int timeout; 345 }; 346 347 /** 348 * The transfer task. 349 * Once done, make sure the nextprobe waiting task is running, whether done 350 * with failure or success. If failure, use shorter timeout for wait time. 351 */ 352 struct auth_transfer { 353 /* Worker pointer. NULL means unowned. */ 354 struct worker* worker; 355 /* module env for this task */ 356 struct module_env* env; 357 358 /** xfer data that has been transferred, the data is applied 359 * once the transfer has completed correctly */ 360 struct auth_chunk* chunks_first; 361 /** last element in chunks list (to append new data at the end) */ 362 struct auth_chunk* chunks_last; 363 364 /** list of upstream masters for this zone, from config */ 365 struct auth_master* masters; 366 367 /** for the hostname lookups, which master is current */ 368 struct auth_master* lookup_target; 369 /** are we looking up A or AAAA, first A, then AAAA (if ip6 enabled) */ 370 int lookup_aaaa; 371 372 /** once notified, or the timeout has been reached. a scan starts. */ 373 /** the scan specific target (notify source), or NULL if none */ 374 struct auth_master* scan_specific; 375 /** scan tries all the upstream masters. the scan current target. 376 * or NULL if not working on sequential scan */ 377 struct auth_master* scan_target; 378 /** what address we are scanning for the master, or NULL if the 379 * master is in IP format itself */ 380 struct auth_addr* scan_addr; 381 /** the zone transfer in progress (or NULL if in scan). It is 382 * from this master */ 383 struct auth_master* master; 384 385 /** failed ixfr transfer, retry with axfr (to the current master), 386 * the IXFR was 'REFUSED', 'SERVFAIL', 'NOTIMPL' or the contents of 387 * the IXFR did not apply cleanly (out of sync, delete of nonexistent 388 * data or add of duplicate data). Flag is cleared once the retry 389 * with axfr is done. */ 390 int ixfr_fail; 391 /** we saw an ixfr-indicating timeout, count of them */ 392 int ixfr_possible_timeout_count; 393 /** we are doing IXFR right now */ 394 int on_ixfr; 395 /** did we detect the current AXFR/IXFR serial number yet, 0 not yet, 396 * 1 we saw the first, 2 we saw the second, 3 must be last SOA in xfr*/ 397 int got_xfr_serial; 398 /** number of RRs scanned for AXFR/IXFR detection */ 399 size_t rr_scan_num; 400 /** we are doing an IXFR but we detected an AXFR contents */ 401 int on_ixfr_is_axfr; 402 /** the serial number for the current AXFR/IXFR incoming reply, 403 * for IXFR, the outermost SOA records serial */ 404 uint32_t incoming_xfr_serial; 405 406 /** dns id of AXFR query */ 407 uint16_t id; 408 /** the transfer (TCP) to the master. 409 * on the workers event base. */ 410 struct comm_point* cp; 411 /** timeout for the transfer. 412 * on the workers event base. */ 413 struct comm_timer* timer; 414 }; 415 416 /** list of addresses */ 417 struct auth_addr { 418 /** next in list */ 419 struct auth_addr* next; 420 /** IP address */ 421 struct sockaddr_storage addr; 422 /** addr length */ 423 socklen_t addrlen; 424 }; 425 426 /** auth zone master upstream, and the config settings for it */ 427 struct auth_master { 428 /** next master in list */ 429 struct auth_master* next; 430 /** master IP address (and port), or hostname, string */ 431 char* host; 432 /** for http, filename */ 433 char* file; 434 /** use HTTP for this master */ 435 int http; 436 /** use IXFR for this master */ 437 int ixfr; 438 /** this is an allow notify member, the master can send notifies 439 * to us, but we don't send SOA probes, or zone transfer from it */ 440 int allow_notify; 441 /** use ssl for channel */ 442 int ssl; 443 /** the port number (for urls) */ 444 int port; 445 /** if the host is a hostname, the list of resolved addrs, if any*/ 446 struct auth_addr* list; 447 }; 448 449 /** auth zone master zone transfer data chunk */ 450 struct auth_chunk { 451 /** next chunk in list */ 452 struct auth_chunk* next; 453 /** the data from this chunk, this is what was received. 454 * for an IXFR that means results from comm_net tcp actions, 455 * packets. also for an AXFR. For HTTP a zonefile chunk. */ 456 uint8_t* data; 457 /** length of allocated data */ 458 size_t len; 459 }; 460 461 /** 462 * Create auth zones structure 463 */ 464 struct auth_zones* auth_zones_create(void); 465 466 /** 467 * Apply configuration to auth zones. Reads zonefiles. 468 * @param az: auth zones structure 469 * @param cfg: config to apply. 470 * @param setup: if true, also sets up values in the auth zones structure 471 * @param is_rpz: set to 1 if at least one RPZ zone is configured. 472 * @return false on failure. 473 */ 474 int auth_zones_apply_cfg(struct auth_zones* az, struct config_file* cfg, 475 int setup, int* is_rpz); 476 477 /** initial pick up of worker timeouts, ties events to worker event loop 478 * @param az: auth zones structure 479 * @param env: worker env, of first worker that receives the events (if any) 480 * in its eventloop. 481 */ 482 void auth_xfer_pickup_initial(struct auth_zones* az, struct module_env* env); 483 484 /** 485 * Cleanup auth zones. This removes all events from event bases. 486 * Stops the xfr tasks. But leaves zone data. 487 * @param az: auth zones structure. 488 */ 489 void auth_zones_cleanup(struct auth_zones* az); 490 491 /** 492 * Delete auth zones structure 493 */ 494 void auth_zones_delete(struct auth_zones* az); 495 496 /** 497 * Write auth zone data to file, in zonefile format. 498 */ 499 int auth_zone_write_file(struct auth_zone* z, const char* fname); 500 501 /** 502 * Use auth zones to lookup the answer to a query. 503 * The query is from the iterator. And the auth zones attempts to provide 504 * the answer instead of going to the internet. 505 * 506 * @param az: auth zones structure. 507 * @param qinfo: query info to lookup. 508 * @param region: region to use to allocate the reply in. 509 * @param msg: reply is stored here (if one). 510 * @param fallback: if true, fallback to making a query to the internet. 511 * @param dp_nm: name of delegation point to look for. This zone is used 512 * to answer the query. 513 * If the dp_nm is not found, fallback is set to true and false returned. 514 * @param dp_nmlen: length of dp_nm. 515 * @return 0: failure (an error of some sort, like servfail). 516 * if 0 and fallback is true, fallback to the internet. 517 * if 0 and fallback is false, like getting servfail. 518 * If true, an answer is available. 519 */ 520 int auth_zones_lookup(struct auth_zones* az, struct query_info* qinfo, 521 struct regional* region, struct dns_msg** msg, int* fallback, 522 uint8_t* dp_nm, size_t dp_nmlen); 523 524 /** 525 * Answer query from auth zone. Create authoritative answer. 526 * @param az: auth zones structure. 527 * @param env: the module environment. 528 * @param qinfo: query info (parsed). 529 * @param edns: edns info (parsed). 530 * @param buf: buffer with query ID and flags, also for reply. 531 * @param repinfo: reply information for a communication point. 532 * @param temp: temporary storage region. 533 * @return false if not answered 534 */ 535 int auth_zones_answer(struct auth_zones* az, struct module_env* env, 536 struct query_info* qinfo, struct edns_data* edns, 537 struct comm_reply* repinfo, struct sldns_buffer* buf, struct regional* temp); 538 539 /** 540 * Find the auth zone that is above the given qname. 541 * Return NULL when there is no auth_zone above the give name, otherwise 542 * returns the closest auth_zone above the qname that pertains to it. 543 * @param az: auth zones structure. 544 * @param name: query to look up for. 545 * @param name_len: length of name. 546 * @param dclass: class of zone to find. 547 * @return NULL or auth_zone that pertains to the query. 548 */ 549 struct auth_zone* auth_zones_find_zone(struct auth_zones* az, 550 uint8_t* name, size_t name_len, uint16_t dclass); 551 552 /** find an auth zone by name (exact match by name or NULL returned) */ 553 struct auth_zone* auth_zone_find(struct auth_zones* az, uint8_t* nm, 554 size_t nmlen, uint16_t dclass); 555 556 /** find an xfer zone by name (exact match by name or NULL returned) */ 557 struct auth_xfer* auth_xfer_find(struct auth_zones* az, uint8_t* nm, 558 size_t nmlen, uint16_t dclass); 559 560 /** create an auth zone. returns wrlocked zone. caller must have wrlock 561 * on az. returns NULL on malloc failure */ 562 struct auth_zone* auth_zone_create(struct auth_zones* az, uint8_t* nm, 563 size_t nmlen, uint16_t dclass); 564 565 /** set auth zone zonefile string. caller must have lock on zone */ 566 int auth_zone_set_zonefile(struct auth_zone* z, char* zonefile); 567 568 /** set auth zone fallback. caller must have lock on zone. 569 * fallbackstr is "yes" or "no". false on parse failure. */ 570 int auth_zone_set_fallback(struct auth_zone* z, char* fallbackstr); 571 572 /** see if the auth zone for the name can fallback 573 * @param az: auth zones 574 * @param nm: name of delegation point. 575 * @param nmlen: length of nm. 576 * @param dclass: class of zone to look for. 577 * @return true if fallback_enabled is true. false if not. 578 * if the zone does not exist, fallback is true (more lenient) 579 * also true if zone does not do upstream requests. 580 */ 581 int auth_zones_can_fallback(struct auth_zones* az, uint8_t* nm, size_t nmlen, 582 uint16_t dclass); 583 584 /** process notify for auth zones. 585 * first checks the access list. Then processes the notify. This starts 586 * the probe sequence or it notes the serial number (if any) 587 * @param az: auth zones structure. 588 * @param env: module env of the worker that is handling the notify. it will 589 * pick up the task probe (or transfer), unless already in progress by 590 * another worker. 591 * @param nm: name of the zone. Uncompressed. from query. 592 * @param nmlen: length of name. 593 * @param dclass: class of zone. 594 * @param addr: source address of notify 595 * @param addrlen: length of addr. 596 * @param has_serial: if true, the notify has a serial attached. 597 * @param serial: the serial number, if has_serial is true. 598 * @param refused: is set to true on failure to note refused access. 599 * @return fail on failures (refused is false) and when access is 600 * denied (refused is true). True when processed. 601 */ 602 int auth_zones_notify(struct auth_zones* az, struct module_env* env, 603 uint8_t* nm, size_t nmlen, uint16_t dclass, 604 struct sockaddr_storage* addr, socklen_t addrlen, int has_serial, 605 uint32_t serial, int* refused); 606 607 /** process notify packet and read serial number from SOA. 608 * returns 0 if no soa record in the notify */ 609 int auth_zone_parse_notify_serial(struct sldns_buffer* pkt, uint32_t *serial); 610 611 /** for the zone and if not already going, starts the probe sequence. 612 * false if zone cannot be found. This is like a notify arrived and was 613 * accepted for that zone. */ 614 int auth_zones_startprobesequence(struct auth_zones* az, 615 struct module_env* env, uint8_t* nm, size_t nmlen, uint16_t dclass); 616 617 /** read auth zone from zonefile. caller must lock zone. false on failure */ 618 int auth_zone_read_zonefile(struct auth_zone* z, struct config_file* cfg); 619 620 /** find serial number of zone or false if none (no SOA record) */ 621 int auth_zone_get_serial(struct auth_zone* z, uint32_t* serial); 622 623 /** compare auth_zones for sorted rbtree */ 624 int auth_zone_cmp(const void* z1, const void* z2); 625 626 /** compare auth_data for sorted rbtree */ 627 int auth_data_cmp(const void* z1, const void* z2); 628 629 /** compare auth_xfer for sorted rbtree */ 630 int auth_xfer_cmp(const void* z1, const void* z2); 631 632 /** Create auth_xfer structure. 633 * Caller must have wrlock on az. Returns locked xfer zone. 634 * @param az: zones structure. 635 * @param z: zone with name and class 636 * @return xfer zone or NULL 637 */ 638 struct auth_xfer* auth_xfer_create(struct auth_zones* az, struct auth_zone* z); 639 640 /** 641 * Set masters in auth xfer structure from config. 642 * @param list: pointer to start of list. The malloced list is returned here. 643 * @param c: the config items to copy over. 644 * @param with_http: if true, http urls are also included, before the masters. 645 * @return false on failure. 646 */ 647 int xfer_set_masters(struct auth_master** list, struct config_auth* c, 648 int with_http); 649 650 /** xfer nextprobe timeout callback, this is part of task_nextprobe */ 651 void auth_xfer_timer(void* arg); 652 653 /** callback for commpoint udp replies to task_probe */ 654 int auth_xfer_probe_udp_callback(struct comm_point* c, void* arg, int err, 655 struct comm_reply* repinfo); 656 /** callback for task_transfer tcp connections */ 657 int auth_xfer_transfer_tcp_callback(struct comm_point* c, void* arg, int err, 658 struct comm_reply* repinfo); 659 /** callback for task_transfer http connections */ 660 int auth_xfer_transfer_http_callback(struct comm_point* c, void* arg, int err, 661 struct comm_reply* repinfo); 662 /** xfer probe timeout callback, part of task_probe */ 663 void auth_xfer_probe_timer_callback(void* arg); 664 /** xfer transfer timeout callback, part of task_transfer */ 665 void auth_xfer_transfer_timer_callback(void* arg); 666 /** mesh callback for task_probe on lookup of host names */ 667 void auth_xfer_probe_lookup_callback(void* arg, int rcode, 668 struct sldns_buffer* buf, enum sec_status sec, char* why_bogus, 669 int was_ratelimited); 670 /** mesh callback for task_transfer on lookup of host names */ 671 void auth_xfer_transfer_lookup_callback(void* arg, int rcode, 672 struct sldns_buffer* buf, enum sec_status sec, char* why_bogus, 673 int was_ratelimited); 674 675 /* 676 * Compares two 32-bit serial numbers as defined in RFC1982. Returns 677 * <0 if a < b, 0 if a == b, and >0 if a > b. The result is undefined 678 * if a != b but neither is greater or smaller (see RFC1982 section 679 * 3.2.). 680 */ 681 int compare_serial(uint32_t a, uint32_t b); 682 683 #endif /* SERVICES_AUTHZONE_H */ 684