2 * daemon/worker.c - worker that handles a pending list of requests.
4 * Copyright (c) 2007, NLnet Labs. All rights reserved.
6 * This software is open source.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
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.
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.
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.
39 * This file implements the worker that handles callbacks on events, for
44 #include "util/net_help.h"
45 #include "util/random.h"
46 #include "daemon/worker.h"
47 #include "daemon/daemon.h"
48 #include "daemon/remote.h"
49 #include "daemon/acl_list.h"
50 #include "util/netevent.h"
51 #include "util/config_file.h"
52 #include "util/module.h"
53 #include "util/regional.h"
54 #include "util/storage/slabhash.h"
55 #include "services/listen_dnsport.h"
56 #include "services/outside_network.h"
57 #include "services/outbound_list.h"
58 #include "services/cache/rrset.h"
59 #include "services/cache/infra.h"
60 #include "services/cache/dns.h"
61 #include "services/authzone.h"
62 #include "services/mesh.h"
63 #include "services/localzone.h"
64 #include "util/data/msgparse.h"
65 #include "util/data/msgencode.h"
66 #include "util/data/dname.h"
67 #include "util/fptr_wlist.h"
68 #include "util/tube.h"
69 #include "util/edns.h"
70 #include "iterator/iter_fwd.h"
71 #include "iterator/iter_hints.h"
72 #include "validator/autotrust.h"
73 #include "validator/val_anchor.h"
74 #include "respip/respip.h"
75 #include "libunbound/context.h"
76 #include "libunbound/libworker.h"
77 #include "sldns/sbuffer.h"
78 #include "sldns/wire2str.h"
79 #include "util/shm_side/shm_main.h"
80 #include "dnscrypt/dnscrypt.h"
82 #ifdef HAVE_SYS_TYPES_H
83 # include <sys/types.h>
90 #include "winrc/win_svc.h"
93 /** Size of an UDP datagram */
94 #define NORMAL_UDP_SIZE 512 /* bytes */
95 /** ratelimit for error responses */
96 #define ERROR_RATELIMIT 100 /* qps */
99 * seconds to add to prefetch leeway. This is a TTL that expires old rrsets
100 * earlier than they should in order to put the new update into the cache.
101 * This additional value is to make sure that if not all TTLs are equal in
102 * the message to be updated(and replaced), that rrsets with up to this much
103 * extra TTL are also replaced. This means that the resulting new message
104 * will have (most likely) this TTL at least, avoiding very small 'split
105 * second' TTLs due to operators choosing relative primes for TTLs (or so).
106 * Also has to be at least one to break ties (and overwrite cached entry).
108 #define PREFETCH_EXPIRY_ADD 60
110 /** Report on memory usage by this thread and global */
112 worker_mem_report(struct worker* ATTR_UNUSED(worker),
113 struct serviced_query* ATTR_UNUSED(cur_serv))
115 #ifdef UNBOUND_ALLOC_STATS
116 /* measure memory leakage */
117 extern size_t unbound_mem_alloc, unbound_mem_freed;
118 /* debug func in validator module */
119 size_t total, front, back, mesh, msg, rrset, infra, ac, superac;
120 size_t me, iter, val, anch;
124 #endif /* CLIENT_SUBNET */
125 if(verbosity < VERB_ALGO)
127 front = listen_get_mem(worker->front);
128 back = outnet_get_mem(worker->back);
129 msg = slabhash_get_mem(worker->env.msg_cache);
130 rrset = slabhash_get_mem(&worker->env.rrset_cache->table);
131 infra = infra_get_mem(worker->env.infra_cache);
132 mesh = mesh_get_mem(worker->env.mesh);
133 ac = alloc_get_mem(&worker->alloc);
134 superac = alloc_get_mem(&worker->daemon->superalloc);
135 anch = anchors_get_mem(worker->env.anchors);
138 for(i=0; i<worker->env.mesh->mods.num; i++) {
139 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
140 mods.mod[i]->get_mem));
141 if(strcmp(worker->env.mesh->mods.mod[i]->name, "validator")==0)
142 val += (*worker->env.mesh->mods.mod[i]->get_mem)
145 else if(strcmp(worker->env.mesh->mods.mod[i]->name,
147 subnet += (*worker->env.mesh->mods.mod[i]->get_mem)
149 #endif /* CLIENT_SUBNET */
150 else iter += (*worker->env.mesh->mods.mod[i]->get_mem)
153 me = sizeof(*worker) + sizeof(*worker->base) + sizeof(*worker->comsig)
154 + comm_point_get_mem(worker->cmd_com)
155 + sizeof(worker->rndstate)
156 + regional_get_mem(worker->scratchpad)
157 + sizeof(*worker->env.scratch_buffer)
158 + sldns_buffer_capacity(worker->env.scratch_buffer)
159 + forwards_get_mem(worker->env.fwds)
160 + hints_get_mem(worker->env.hints);
161 if(worker->thread_num == 0)
162 me += acl_list_get_mem(worker->daemon->acl);
164 me += serviced_get_mem(cur_serv);
166 total = front+back+mesh+msg+rrset+infra+iter+val+ac+superac+me;
169 log_info("Memory conditions: %u front=%u back=%u mesh=%u msg=%u "
170 "rrset=%u infra=%u iter=%u val=%u subnet=%u anchors=%u "
171 "alloccache=%u globalalloccache=%u me=%u",
172 (unsigned)total, (unsigned)front, (unsigned)back,
173 (unsigned)mesh, (unsigned)msg, (unsigned)rrset, (unsigned)infra,
174 (unsigned)iter, (unsigned)val,
175 (unsigned)subnet, (unsigned)anch, (unsigned)ac,
176 (unsigned)superac, (unsigned)me);
177 #else /* no CLIENT_SUBNET */
178 log_info("Memory conditions: %u front=%u back=%u mesh=%u msg=%u "
179 "rrset=%u infra=%u iter=%u val=%u anchors=%u "
180 "alloccache=%u globalalloccache=%u me=%u",
181 (unsigned)total, (unsigned)front, (unsigned)back,
182 (unsigned)mesh, (unsigned)msg, (unsigned)rrset,
183 (unsigned)infra, (unsigned)iter, (unsigned)val, (unsigned)anch,
184 (unsigned)ac, (unsigned)superac, (unsigned)me);
185 #endif /* CLIENT_SUBNET */
186 log_info("Total heap memory estimate: %u total-alloc: %u "
187 "total-free: %u", (unsigned)total,
188 (unsigned)unbound_mem_alloc, (unsigned)unbound_mem_freed);
189 #else /* no UNBOUND_ALLOC_STATS */
193 #endif /* CLIENT_SUBNET */
195 if(verbosity < VERB_QUERY)
197 for(i=0; i<worker->env.mesh->mods.num; i++) {
198 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
199 mods.mod[i]->get_mem));
200 if(strcmp(worker->env.mesh->mods.mod[i]->name, "validator")==0)
201 val += (*worker->env.mesh->mods.mod[i]->get_mem)
204 else if(strcmp(worker->env.mesh->mods.mod[i]->name,
206 subnet += (*worker->env.mesh->mods.mod[i]->get_mem)
208 #endif /* CLIENT_SUBNET */
211 verbose(VERB_QUERY, "cache memory msg=%u rrset=%u infra=%u val=%u "
213 (unsigned)slabhash_get_mem(worker->env.msg_cache),
214 (unsigned)slabhash_get_mem(&worker->env.rrset_cache->table),
215 (unsigned)infra_get_mem(worker->env.infra_cache),
216 (unsigned)val, (unsigned)subnet);
217 #else /* no CLIENT_SUBNET */
218 verbose(VERB_QUERY, "cache memory msg=%u rrset=%u infra=%u val=%u",
219 (unsigned)slabhash_get_mem(worker->env.msg_cache),
220 (unsigned)slabhash_get_mem(&worker->env.rrset_cache->table),
221 (unsigned)infra_get_mem(worker->env.infra_cache),
223 #endif /* CLIENT_SUBNET */
224 #endif /* UNBOUND_ALLOC_STATS */
228 worker_send_cmd(struct worker* worker, enum worker_commands cmd)
230 uint32_t c = (uint32_t)htonl(cmd);
231 if(!tube_write_msg(worker->cmd, (uint8_t*)&c, sizeof(c), 0)) {
232 log_err("worker send cmd %d failed", (int)cmd);
237 worker_handle_reply(struct comm_point* c, void* arg, int error,
238 struct comm_reply* reply_info)
240 struct module_qstate* q = (struct module_qstate*)arg;
241 struct worker* worker = q->env->worker;
242 struct outbound_entry e;
247 mesh_report_reply(worker->env.mesh, &e, reply_info, error);
248 worker_mem_report(worker, NULL);
252 if(!LDNS_QR_WIRE(sldns_buffer_begin(c->buffer))
253 || LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) !=
255 || LDNS_QDCOUNT(sldns_buffer_begin(c->buffer)) > 1) {
256 /* error becomes timeout for the module as if this reply
258 mesh_report_reply(worker->env.mesh, &e, reply_info,
260 worker_mem_report(worker, NULL);
263 mesh_report_reply(worker->env.mesh, &e, reply_info, NETEVENT_NOERROR);
264 worker_mem_report(worker, NULL);
269 worker_handle_service_reply(struct comm_point* c, void* arg, int error,
270 struct comm_reply* reply_info)
272 struct outbound_entry* e = (struct outbound_entry*)arg;
273 struct worker* worker = e->qstate->env->worker;
274 struct serviced_query *sq = e->qsent;
276 verbose(VERB_ALGO, "worker svcd callback for qstate %p", e->qstate);
278 mesh_report_reply(worker->env.mesh, e, reply_info, error);
279 worker_mem_report(worker, sq);
283 if(!LDNS_QR_WIRE(sldns_buffer_begin(c->buffer))
284 || LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) !=
286 || LDNS_QDCOUNT(sldns_buffer_begin(c->buffer)) > 1) {
287 /* error becomes timeout for the module as if this reply
289 verbose(VERB_ALGO, "worker: bad reply handled as timeout");
290 mesh_report_reply(worker->env.mesh, e, reply_info,
292 worker_mem_report(worker, sq);
295 mesh_report_reply(worker->env.mesh, e, reply_info, NETEVENT_NOERROR);
296 worker_mem_report(worker, sq);
300 /** ratelimit error replies
301 * @param worker: the worker struct with ratelimit counter
302 * @param err: error code that would be wanted.
303 * @return value of err if okay, or -1 if it should be discarded instead.
306 worker_err_ratelimit(struct worker* worker, int err)
308 if(worker->err_limit_time == *worker->env.now) {
309 /* see if limit is exceeded for this second */
310 if(worker->err_limit_count++ > ERROR_RATELIMIT)
313 /* new second, new limits */
314 worker->err_limit_time = *worker->env.now;
315 worker->err_limit_count = 1;
320 /** check request sanity.
321 * @param pkt: the wire packet to examine for sanity.
322 * @param worker: parameters for checking.
323 * @return error code, 0 OK, or -1 discard.
326 worker_check_request(sldns_buffer* pkt, struct worker* worker)
328 if(sldns_buffer_limit(pkt) < LDNS_HEADER_SIZE) {
329 verbose(VERB_QUERY, "request too short, discarded");
332 if(sldns_buffer_limit(pkt) > NORMAL_UDP_SIZE &&
333 worker->daemon->cfg->harden_large_queries) {
334 verbose(VERB_QUERY, "request too large, discarded");
337 if(LDNS_QR_WIRE(sldns_buffer_begin(pkt))) {
338 verbose(VERB_QUERY, "request has QR bit on, discarded");
341 if(LDNS_TC_WIRE(sldns_buffer_begin(pkt))) {
342 LDNS_TC_CLR(sldns_buffer_begin(pkt));
343 verbose(VERB_QUERY, "request bad, has TC bit on");
344 return worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
346 if(LDNS_OPCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_PACKET_QUERY &&
347 LDNS_OPCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_PACKET_NOTIFY) {
348 verbose(VERB_QUERY, "request unknown opcode %d",
349 LDNS_OPCODE_WIRE(sldns_buffer_begin(pkt)));
350 return worker_err_ratelimit(worker, LDNS_RCODE_NOTIMPL);
352 if(LDNS_QDCOUNT(sldns_buffer_begin(pkt)) != 1) {
353 verbose(VERB_QUERY, "request wrong nr qd=%d",
354 LDNS_QDCOUNT(sldns_buffer_begin(pkt)));
355 return worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
357 if(LDNS_ANCOUNT(sldns_buffer_begin(pkt)) != 0 &&
358 (LDNS_ANCOUNT(sldns_buffer_begin(pkt)) != 1 ||
359 LDNS_OPCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_PACKET_NOTIFY)) {
360 verbose(VERB_QUERY, "request wrong nr an=%d",
361 LDNS_ANCOUNT(sldns_buffer_begin(pkt)));
362 return worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
364 if(LDNS_NSCOUNT(sldns_buffer_begin(pkt)) != 0) {
365 verbose(VERB_QUERY, "request wrong nr ns=%d",
366 LDNS_NSCOUNT(sldns_buffer_begin(pkt)));
367 return worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
369 if(LDNS_ARCOUNT(sldns_buffer_begin(pkt)) > 1) {
370 verbose(VERB_QUERY, "request wrong nr ar=%d",
371 LDNS_ARCOUNT(sldns_buffer_begin(pkt)));
372 return worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
378 worker_handle_control_cmd(struct tube* ATTR_UNUSED(tube), uint8_t* msg,
379 size_t len, int error, void* arg)
381 struct worker* worker = (struct worker*)arg;
382 enum worker_commands cmd;
383 if(error != NETEVENT_NOERROR) {
385 if(error == NETEVENT_CLOSED)
386 comm_base_exit(worker->base);
387 else log_info("control event: %d", error);
390 if(len != sizeof(uint32_t)) {
391 fatal_exit("bad control msg length %d", (int)len);
393 cmd = sldns_read_uint32(msg);
396 case worker_cmd_quit:
397 verbose(VERB_ALGO, "got control cmd quit");
398 comm_base_exit(worker->base);
400 case worker_cmd_stats:
401 verbose(VERB_ALGO, "got control cmd stats");
402 server_stats_reply(worker, 1);
404 case worker_cmd_stats_noreset:
405 verbose(VERB_ALGO, "got control cmd stats_noreset");
406 server_stats_reply(worker, 0);
408 case worker_cmd_remote:
409 verbose(VERB_ALGO, "got control cmd remote");
410 daemon_remote_exec(worker);
413 log_err("bad command %d", (int)cmd);
418 /** check if a delegation is secure */
419 static enum sec_status
420 check_delegation_secure(struct reply_info *rep)
422 /* return smallest security status */
424 enum sec_status sec = sec_status_secure;
426 size_t num = rep->an_numrrsets + rep->ns_numrrsets;
427 /* check if answer and authority are OK */
428 for(i=0; i<num; i++) {
429 s = ((struct packed_rrset_data*)rep->rrsets[i]->entry.data)
434 /* in additional, only unchecked triggers revalidation */
435 for(i=num; i<rep->rrset_count; i++) {
436 s = ((struct packed_rrset_data*)rep->rrsets[i]->entry.data)
438 if(s == sec_status_unchecked)
444 /** remove nonsecure from a delegation referral additional section */
446 deleg_remove_nonsecure_additional(struct reply_info* rep)
448 /* we can simply edit it, since we are working in the scratch region */
452 for(i = rep->an_numrrsets+rep->ns_numrrsets; i<rep->rrset_count; i++) {
453 s = ((struct packed_rrset_data*)rep->rrsets[i]->entry.data)
455 if(s != sec_status_secure) {
456 memmove(rep->rrsets+i, rep->rrsets+i+1,
457 sizeof(struct ub_packed_rrset_key*)*
458 (rep->rrset_count - i - 1));
466 /** answer nonrecursive query from the cache */
468 answer_norec_from_cache(struct worker* worker, struct query_info* qinfo,
469 uint16_t id, uint16_t flags, struct comm_reply* repinfo,
470 struct edns_data* edns)
472 /* for a nonrecursive query return either:
473 * o an error (servfail; we try to avoid this)
474 * o a delegation (closest we have; this routine tries that)
475 * o the answer (checked by answer_from_cache)
477 * So, grab a delegation from the rrset cache.
478 * Then check if it needs validation, if so, this routine fails,
479 * so that iterator can prime and validator can verify rrsets.
481 struct edns_data edns_bak;
482 uint16_t udpsize = edns->udp_size;
484 time_t timenow = *worker->env.now;
485 int must_validate = (!(flags&BIT_CD) || worker->env.cfg->ignore_cd)
486 && worker->env.need_to_validate;
487 struct dns_msg *msg = NULL;
490 dp = dns_cache_find_delegation(&worker->env, qinfo->qname,
491 qinfo->qname_len, qinfo->qtype, qinfo->qclass,
492 worker->scratchpad, &msg, timenow);
493 if(!dp) { /* no delegation, need to reprime */
496 /* In case we have a local alias, copy it into the delegation message.
497 * Shallow copy should be fine, as we'll be done with msg in this
499 msg->qinfo.local_alias = qinfo->local_alias;
501 switch(check_delegation_secure(msg->rep)) {
502 case sec_status_unchecked:
503 /* some rrsets have not been verified yet, go and
504 * let validator do that */
506 case sec_status_bogus:
507 case sec_status_secure_sentinel_fail:
508 /* some rrsets are bogus, reply servfail */
509 edns->edns_version = EDNS_ADVERTISED_VERSION;
510 edns->udp_size = EDNS_ADVERTISED_SIZE;
512 edns->bits &= EDNS_DO;
513 if(!inplace_cb_reply_servfail_call(&worker->env, qinfo, NULL,
514 msg->rep, LDNS_RCODE_SERVFAIL, edns, repinfo, worker->scratchpad))
516 error_encode(repinfo->c->buffer, LDNS_RCODE_SERVFAIL,
517 &msg->qinfo, id, flags, edns);
518 if(worker->stats.extended) {
519 worker->stats.ans_bogus++;
520 worker->stats.ans_rcode[LDNS_RCODE_SERVFAIL]++;
523 case sec_status_secure:
524 /* all rrsets are secure */
525 /* remove non-secure rrsets from the add. section*/
526 if(worker->env.cfg->val_clean_additional)
527 deleg_remove_nonsecure_additional(msg->rep);
530 case sec_status_indeterminate:
531 case sec_status_insecure:
538 /* return this delegation from the cache */
540 edns->edns_version = EDNS_ADVERTISED_VERSION;
541 edns->udp_size = EDNS_ADVERTISED_SIZE;
543 edns->bits &= EDNS_DO;
544 if(!inplace_cb_reply_cache_call(&worker->env, qinfo, NULL, msg->rep,
545 (int)(flags&LDNS_RCODE_MASK), edns, repinfo, worker->scratchpad))
547 msg->rep->flags |= BIT_QR|BIT_RA;
548 if(!apply_edns_options(edns, &edns_bak, worker->env.cfg,
549 repinfo->c, worker->scratchpad) ||
550 !reply_info_answer_encode(&msg->qinfo, msg->rep, id, flags,
551 repinfo->c->buffer, 0, 1, worker->scratchpad,
552 udpsize, edns, (int)(edns->bits & EDNS_DO), secure)) {
553 if(!inplace_cb_reply_servfail_call(&worker->env, qinfo, NULL, NULL,
554 LDNS_RCODE_SERVFAIL, edns, repinfo, worker->scratchpad))
555 edns->opt_list = NULL;
556 error_encode(repinfo->c->buffer, LDNS_RCODE_SERVFAIL,
557 &msg->qinfo, id, flags, edns);
559 if(worker->stats.extended) {
560 if(secure) worker->stats.ans_secure++;
561 server_stats_insrcode(&worker->stats, repinfo->c->buffer);
566 /** Apply, if applicable, a response IP action to a cached answer.
567 * If the answer is rewritten as a result of an action, '*encode_repp' will
568 * point to the reply info containing the modified answer. '*encode_repp' will
569 * be intact otherwise.
570 * It returns 1 on success, 0 otherwise. */
572 apply_respip_action(struct worker* worker, const struct query_info* qinfo,
573 struct respip_client_info* cinfo, struct reply_info* rep,
574 struct comm_reply* repinfo, struct ub_packed_rrset_key** alias_rrset,
575 struct reply_info** encode_repp)
577 struct respip_action_info actinfo = {respip_none, NULL};
579 if(qinfo->qtype != LDNS_RR_TYPE_A &&
580 qinfo->qtype != LDNS_RR_TYPE_AAAA &&
581 qinfo->qtype != LDNS_RR_TYPE_ANY)
584 if(!respip_rewrite_reply(qinfo, cinfo, rep, encode_repp, &actinfo,
585 alias_rrset, 0, worker->scratchpad))
588 /* xxx_deny actions mean dropping the reply, unless the original reply
589 * was redirected to response-ip data. */
590 if((actinfo.action == respip_deny ||
591 actinfo.action == respip_inform_deny) &&
595 /* If address info is returned, it means the action should be an
596 * 'inform' variant and the information should be logged. */
597 if(actinfo.addrinfo) {
598 respip_inform_print(actinfo.addrinfo, qinfo->qname,
599 qinfo->qtype, qinfo->qclass, qinfo->local_alias,
606 /** answer query from the cache.
607 * Normally, the answer message will be built in repinfo->c->buffer; if the
608 * answer is supposed to be suppressed or the answer is supposed to be an
609 * incomplete CNAME chain, the buffer is explicitly cleared to signal the
610 * caller as such. In the latter case *partial_rep will point to the incomplete
611 * reply, and this function is (possibly) supposed to be called again with that
612 * *partial_rep value to complete the chain. In addition, if the query should
613 * be completely dropped, '*need_drop' will be set to 1. */
615 answer_from_cache(struct worker* worker, struct query_info* qinfo,
616 struct respip_client_info* cinfo, int* need_drop,
617 struct ub_packed_rrset_key** alias_rrset,
618 struct reply_info** partial_repp,
619 struct reply_info* rep, uint16_t id, uint16_t flags,
620 struct comm_reply* repinfo, struct edns_data* edns)
622 struct edns_data edns_bak;
623 time_t timenow = *worker->env.now;
624 uint16_t udpsize = edns->udp_size;
625 struct reply_info* encode_rep = rep;
626 struct reply_info* partial_rep = *partial_repp;
628 int must_validate = (!(flags&BIT_CD) || worker->env.cfg->ignore_cd)
629 && worker->env.need_to_validate;
630 *partial_repp = NULL; /* avoid accidental further pass */
631 if(worker->env.cfg->serve_expired) {
632 if(worker->env.cfg->serve_expired_ttl &&
633 rep->serve_expired_ttl < timenow)
635 if(!rrset_array_lock(rep->ref, rep->rrset_count, 0))
637 /* below, rrsets with ttl before timenow become TTL 0 in
639 /* This response was served with zero TTL */
640 if (timenow >= rep->ttl) {
641 worker->stats.zero_ttl_responses++;
644 /* see if it is possible */
645 if(rep->ttl < timenow) {
646 /* the rrsets may have been updated in the meantime.
647 * we will refetch the message format from the
648 * authoritative server
652 if(!rrset_array_lock(rep->ref, rep->rrset_count, timenow))
654 /* locked and ids and ttls are OK. */
656 /* check CNAME chain (if any) */
657 if(rep->an_numrrsets > 0 && (rep->rrsets[0]->rk.type ==
658 htons(LDNS_RR_TYPE_CNAME) || rep->rrsets[0]->rk.type ==
659 htons(LDNS_RR_TYPE_DNAME))) {
660 if(!reply_check_cname_chain(qinfo, rep)) {
661 /* cname chain invalid, redo iterator steps */
662 verbose(VERB_ALGO, "Cache reply: cname chain broken");
666 /* check security status of the cached answer */
667 if(must_validate && (rep->security == sec_status_bogus ||
668 rep->security == sec_status_secure_sentinel_fail)) {
670 edns->edns_version = EDNS_ADVERTISED_VERSION;
671 edns->udp_size = EDNS_ADVERTISED_SIZE;
673 edns->bits &= EDNS_DO;
674 if(!inplace_cb_reply_servfail_call(&worker->env, qinfo, NULL, rep,
675 LDNS_RCODE_SERVFAIL, edns, repinfo, worker->scratchpad))
677 error_encode(repinfo->c->buffer, LDNS_RCODE_SERVFAIL,
678 qinfo, id, flags, edns);
679 rrset_array_unlock_touch(worker->env.rrset_cache,
680 worker->scratchpad, rep->ref, rep->rrset_count);
681 if(worker->stats.extended) {
682 worker->stats.ans_bogus ++;
683 worker->stats.ans_rcode[LDNS_RCODE_SERVFAIL] ++;
686 } else if( rep->security == sec_status_unchecked && must_validate) {
687 verbose(VERB_ALGO, "Cache reply: unchecked entry needs "
689 goto bail_out; /* need to validate cache entry first */
690 } else if(rep->security == sec_status_secure) {
691 if(reply_all_rrsets_secure(rep))
695 verbose(VERB_ALGO, "Cache reply: secure entry"
697 goto bail_out; /* rrset changed, re-verify */
704 edns->edns_version = EDNS_ADVERTISED_VERSION;
705 edns->udp_size = EDNS_ADVERTISED_SIZE;
707 edns->bits &= EDNS_DO;
708 if(!inplace_cb_reply_cache_call(&worker->env, qinfo, NULL, rep,
709 (int)(flags&LDNS_RCODE_MASK), edns, repinfo, worker->scratchpad))
711 *alias_rrset = NULL; /* avoid confusion if caller set it to non-NULL */
712 if(worker->daemon->use_response_ip && !partial_rep &&
713 !apply_respip_action(worker, qinfo, cinfo, rep, repinfo, alias_rrset,
716 } else if(partial_rep &&
717 !respip_merge_cname(partial_rep, qinfo, rep, cinfo,
718 must_validate, &encode_rep, worker->scratchpad)) {
721 if(encode_rep != rep)
722 secure = 0; /* if rewritten, it can't be considered "secure" */
723 if(!encode_rep || *alias_rrset) {
727 /* If a partial CNAME chain is found, we first need to
728 * make a copy of the reply in the scratchpad so we
729 * can release the locks and lookup the cache again. */
730 *partial_repp = reply_info_copy(encode_rep, NULL,
735 } else if(!apply_edns_options(edns, &edns_bak, worker->env.cfg,
736 repinfo->c, worker->scratchpad) ||
737 !reply_info_answer_encode(qinfo, encode_rep, id, flags,
738 repinfo->c->buffer, timenow, 1, worker->scratchpad,
739 udpsize, edns, (int)(edns->bits & EDNS_DO), secure)) {
740 if(!inplace_cb_reply_servfail_call(&worker->env, qinfo, NULL, NULL,
741 LDNS_RCODE_SERVFAIL, edns, repinfo, worker->scratchpad))
742 edns->opt_list = NULL;
743 error_encode(repinfo->c->buffer, LDNS_RCODE_SERVFAIL,
744 qinfo, id, flags, edns);
746 /* cannot send the reply right now, because blocking network syscall
747 * is bad while holding locks. */
748 rrset_array_unlock_touch(worker->env.rrset_cache, worker->scratchpad,
749 rep->ref, rep->rrset_count);
750 if(worker->stats.extended) {
751 if(secure) worker->stats.ans_secure++;
752 server_stats_insrcode(&worker->stats, repinfo->c->buffer);
754 /* go and return this buffer to the client */
758 rrset_array_unlock_touch(worker->env.rrset_cache,
759 worker->scratchpad, rep->ref, rep->rrset_count);
763 /** Reply to client and perform prefetch to keep cache up to date. */
765 reply_and_prefetch(struct worker* worker, struct query_info* qinfo,
766 uint16_t flags, struct comm_reply* repinfo, time_t leeway, int noreply)
768 /* first send answer to client to keep its latency
769 * as small as a cachereply */
771 if(repinfo->c->tcp_req_info) {
773 repinfo->c->tcp_req_info->spool_buffer,
776 comm_point_send_reply(repinfo);
778 server_stats_prefetch(&worker->stats, worker);
780 /* create the prefetch in the mesh as a normal lookup without
781 * client addrs waiting, which has the cache blacklisted (to bypass
782 * the cache and go to the network for the data). */
783 /* this (potentially) runs the mesh for the new query */
784 mesh_new_prefetch(worker->env.mesh, qinfo, flags, leeway +
785 PREFETCH_EXPIRY_ADD);
789 * Fill CH class answer into buffer. Keeps query.
791 * @param str: string to put into text record (<255).
792 * array of strings, every string becomes a text record.
793 * @param num: number of strings in array.
794 * @param edns: edns reply information.
795 * @param worker: worker with scratch region.
796 * @param repinfo: reply information for a communication point.
799 chaos_replystr(sldns_buffer* pkt, char** str, int num, struct edns_data* edns,
800 struct worker* worker, struct comm_reply* repinfo)
803 unsigned int rd = LDNS_RD_WIRE(sldns_buffer_begin(pkt));
804 unsigned int cd = LDNS_CD_WIRE(sldns_buffer_begin(pkt));
805 sldns_buffer_clear(pkt);
806 sldns_buffer_skip(pkt, (ssize_t)sizeof(uint16_t)); /* skip id */
807 sldns_buffer_write_u16(pkt, (uint16_t)(BIT_QR|BIT_RA));
808 if(rd) LDNS_RD_SET(sldns_buffer_begin(pkt));
809 if(cd) LDNS_CD_SET(sldns_buffer_begin(pkt));
810 sldns_buffer_write_u16(pkt, 1); /* qdcount */
811 sldns_buffer_write_u16(pkt, (uint16_t)num); /* ancount */
812 sldns_buffer_write_u16(pkt, 0); /* nscount */
813 sldns_buffer_write_u16(pkt, 0); /* arcount */
814 (void)query_dname_len(pkt); /* skip qname */
815 sldns_buffer_skip(pkt, (ssize_t)sizeof(uint16_t)); /* skip qtype */
816 sldns_buffer_skip(pkt, (ssize_t)sizeof(uint16_t)); /* skip qclass */
817 for(i=0; i<num; i++) {
818 size_t len = strlen(str[i]);
819 if(len>255) len=255; /* cap size of TXT record */
820 sldns_buffer_write_u16(pkt, 0xc00c); /* compr ptr to query */
821 sldns_buffer_write_u16(pkt, LDNS_RR_TYPE_TXT);
822 sldns_buffer_write_u16(pkt, LDNS_RR_CLASS_CH);
823 sldns_buffer_write_u32(pkt, 0); /* TTL */
824 sldns_buffer_write_u16(pkt, sizeof(uint8_t) + len);
825 sldns_buffer_write_u8(pkt, len);
826 sldns_buffer_write(pkt, str[i], len);
828 sldns_buffer_flip(pkt);
829 edns->edns_version = EDNS_ADVERTISED_VERSION;
830 edns->udp_size = EDNS_ADVERTISED_SIZE;
831 edns->bits &= EDNS_DO;
832 if(!inplace_cb_reply_local_call(&worker->env, NULL, NULL, NULL,
833 LDNS_RCODE_NOERROR, edns, repinfo, worker->scratchpad))
834 edns->opt_list = NULL;
835 if(sldns_buffer_capacity(pkt) >=
836 sldns_buffer_limit(pkt)+calc_edns_field_size(edns))
837 attach_edns_record(pkt, edns);
840 /** Reply with one string */
842 chaos_replyonestr(sldns_buffer* pkt, const char* str, struct edns_data* edns,
843 struct worker* worker, struct comm_reply* repinfo)
845 chaos_replystr(pkt, (char**)&str, 1, edns, worker, repinfo);
849 * Create CH class trustanchor answer.
851 * @param edns: edns reply information.
852 * @param w: worker with scratch region.
853 * @param repinfo: reply information for a communication point.
856 chaos_trustanchor(sldns_buffer* pkt, struct edns_data* edns, struct worker* w,
857 struct comm_reply* repinfo)
859 #define TA_RESPONSE_MAX_TXT 16 /* max number of TXT records */
860 #define TA_RESPONSE_MAX_TAGS 32 /* max number of tags printed per zone */
861 char* str_array[TA_RESPONSE_MAX_TXT];
862 uint16_t tags[TA_RESPONSE_MAX_TAGS];
864 struct trust_anchor* ta;
866 if(!w->env.need_to_validate) {
867 /* no validator module, reply no trustanchors */
868 chaos_replystr(pkt, NULL, 0, edns, w, repinfo);
872 /* fill the string with contents */
873 lock_basic_lock(&w->env.anchors->lock);
874 RBTREE_FOR(ta, struct trust_anchor*, w->env.anchors->tree) {
876 size_t i, numtag, str_len = 255;
877 if(num == TA_RESPONSE_MAX_TXT) continue;
878 str = (char*)regional_alloc(w->scratchpad, str_len);
880 lock_basic_lock(&ta->lock);
881 numtag = anchor_list_keytags(ta, tags, TA_RESPONSE_MAX_TAGS);
883 /* empty, insecure point */
884 lock_basic_unlock(&ta->lock);
887 str_array[num] = str;
890 /* spool name of anchor */
891 (void)sldns_wire2str_dname_buf(ta->name, ta->namelen, str, str_len);
892 str_len -= strlen(str); str += strlen(str);
894 for(i=0; i<numtag; i++) {
895 snprintf(str, str_len, " %u", (unsigned)tags[i]);
896 str_len -= strlen(str); str += strlen(str);
898 lock_basic_unlock(&ta->lock);
900 lock_basic_unlock(&w->env.anchors->lock);
902 chaos_replystr(pkt, str_array, num, edns, w, repinfo);
903 regional_free_all(w->scratchpad);
907 * Answer CH class queries.
909 * @param qinfo: query info. Pointer into packet buffer.
910 * @param edns: edns info from query.
911 * @param repinfo: reply information for a communication point.
912 * @param pkt: packet buffer.
913 * @return: true if a reply is to be sent.
916 answer_chaos(struct worker* w, struct query_info* qinfo,
917 struct edns_data* edns, struct comm_reply* repinfo, sldns_buffer* pkt)
919 struct config_file* cfg = w->env.cfg;
920 if(qinfo->qtype != LDNS_RR_TYPE_ANY && qinfo->qtype != LDNS_RR_TYPE_TXT)
922 if(query_dname_compare(qinfo->qname,
923 (uint8_t*)"\002id\006server") == 0 ||
924 query_dname_compare(qinfo->qname,
925 (uint8_t*)"\010hostname\004bind") == 0)
927 if(cfg->hide_identity)
929 if(cfg->identity==NULL || cfg->identity[0]==0) {
930 char buf[MAXHOSTNAMELEN+1];
931 if (gethostname(buf, MAXHOSTNAMELEN) == 0) {
932 buf[MAXHOSTNAMELEN] = 0;
933 chaos_replyonestr(pkt, buf, edns, w, repinfo);
935 log_err("gethostname: %s", strerror(errno));
936 chaos_replyonestr(pkt, "no hostname", edns, w, repinfo);
939 else chaos_replyonestr(pkt, cfg->identity, edns, w, repinfo);
942 if(query_dname_compare(qinfo->qname,
943 (uint8_t*)"\007version\006server") == 0 ||
944 query_dname_compare(qinfo->qname,
945 (uint8_t*)"\007version\004bind") == 0)
947 if(cfg->hide_version)
949 if(cfg->version==NULL || cfg->version[0]==0)
950 chaos_replyonestr(pkt, PACKAGE_STRING, edns, w, repinfo);
951 else chaos_replyonestr(pkt, cfg->version, edns, w, repinfo);
954 if(query_dname_compare(qinfo->qname,
955 (uint8_t*)"\013trustanchor\007unbound") == 0)
957 if(cfg->hide_trustanchor)
959 chaos_trustanchor(pkt, edns, w, repinfo);
967 * Answer notify queries. These are notifies for authoritative zones,
968 * the reply is an ack that the notify has been received. We need to check
969 * access permission here.
971 * @param qinfo: query info. Pointer into packet buffer.
972 * @param edns: edns info from query.
973 * @param repinfo: reply info with source address.
974 * @param pkt: packet buffer.
977 answer_notify(struct worker* w, struct query_info* qinfo,
978 struct edns_data* edns, sldns_buffer* pkt, struct comm_reply* repinfo)
981 int rcode = LDNS_RCODE_NOERROR;
984 if(!w->env.auth_zones) return;
985 has_serial = auth_zone_parse_notify_serial(pkt, &serial);
986 if(auth_zones_notify(w->env.auth_zones, &w->env, qinfo->qname,
987 qinfo->qname_len, qinfo->qclass, &repinfo->addr,
988 repinfo->addrlen, has_serial, serial, &refused)) {
989 rcode = LDNS_RCODE_NOERROR;
992 rcode = LDNS_RCODE_REFUSED;
993 else rcode = LDNS_RCODE_SERVFAIL;
996 if(verbosity >= VERB_DETAIL) {
1000 dname_str(qinfo->qname, zname);
1003 snprintf(sr, sizeof(sr), "serial %u ",
1005 if(rcode == LDNS_RCODE_REFUSED)
1006 snprintf(buf, sizeof(buf),
1007 "refused NOTIFY %sfor %s from", sr, zname);
1008 else if(rcode == LDNS_RCODE_SERVFAIL)
1009 snprintf(buf, sizeof(buf),
1010 "servfail for NOTIFY %sfor %s from", sr, zname);
1011 else snprintf(buf, sizeof(buf),
1012 "received NOTIFY %sfor %s from", sr, zname);
1013 log_addr(VERB_DETAIL, buf, &repinfo->addr, repinfo->addrlen);
1015 edns->edns_version = EDNS_ADVERTISED_VERSION;
1016 edns->udp_size = EDNS_ADVERTISED_SIZE;
1017 edns->ext_rcode = 0;
1018 edns->bits &= EDNS_DO;
1019 edns->opt_list = NULL;
1020 error_encode(pkt, rcode, qinfo,
1021 *(uint16_t*)(void *)sldns_buffer_begin(pkt),
1022 sldns_buffer_read_u16_at(pkt, 2), edns);
1023 LDNS_OPCODE_SET(sldns_buffer_begin(pkt), LDNS_PACKET_NOTIFY);
1027 deny_refuse(struct comm_point* c, enum acl_access acl,
1028 enum acl_access deny, enum acl_access refuse,
1029 struct worker* worker, struct comm_reply* repinfo)
1032 comm_point_drop_reply(repinfo);
1033 if(worker->stats.extended)
1034 worker->stats.unwanted_queries++;
1036 } else if(acl == refuse) {
1037 log_addr(VERB_ALGO, "refused query from",
1038 &repinfo->addr, repinfo->addrlen);
1039 log_buf(VERB_ALGO, "refuse", c->buffer);
1040 if(worker->stats.extended)
1041 worker->stats.unwanted_queries++;
1042 if(worker_check_request(c->buffer, worker) == -1) {
1043 comm_point_drop_reply(repinfo);
1044 return 0; /* discard this */
1046 sldns_buffer_set_limit(c->buffer, LDNS_HEADER_SIZE);
1047 sldns_buffer_write_at(c->buffer, 4,
1048 (uint8_t*)"\0\0\0\0\0\0\0\0", 8);
1049 LDNS_QR_SET(sldns_buffer_begin(c->buffer));
1050 LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
1051 LDNS_RCODE_REFUSED);
1052 sldns_buffer_set_position(c->buffer, LDNS_HEADER_SIZE);
1053 sldns_buffer_flip(c->buffer);
1061 deny_refuse_all(struct comm_point* c, enum acl_access acl,
1062 struct worker* worker, struct comm_reply* repinfo)
1064 return deny_refuse(c, acl, acl_deny, acl_refuse, worker, repinfo);
1068 deny_refuse_non_local(struct comm_point* c, enum acl_access acl,
1069 struct worker* worker, struct comm_reply* repinfo)
1071 return deny_refuse(c, acl, acl_deny_non_local, acl_refuse_non_local, worker, repinfo);
1075 worker_handle_request(struct comm_point* c, void* arg, int error,
1076 struct comm_reply* repinfo)
1078 struct worker* worker = (struct worker*)arg;
1081 struct lruhash_entry* e;
1082 struct query_info qinfo;
1083 struct edns_data edns;
1084 enum acl_access acl;
1085 struct acl_addr* acladdr;
1088 /* We might have to chase a CNAME chain internally, in which case
1089 * we'll have up to two replies and combine them to build a complete
1090 * answer. These variables control this case. */
1091 struct ub_packed_rrset_key* alias_rrset = NULL;
1092 struct reply_info* partial_rep = NULL;
1093 struct query_info* lookup_qinfo = &qinfo;
1094 struct query_info qinfo_tmp; /* placeholder for lookup_qinfo */
1095 struct respip_client_info* cinfo = NULL, cinfo_tmp;
1096 memset(&qinfo, 0, sizeof(qinfo));
1098 if(error != NETEVENT_NOERROR || !repinfo) {
1099 /* some bad tcp query DNS formats give these error calls */
1100 verbose(VERB_ALGO, "handle request called with err=%d", error);
1104 repinfo->max_udp_size = worker->daemon->cfg->max_udp_size;
1105 if(!dnsc_handle_curved_request(worker->daemon->dnscenv, repinfo)) {
1106 worker->stats.num_query_dnscrypt_crypted_malformed++;
1109 if(c->dnscrypt && !repinfo->is_dnscrypted) {
1110 char buf[LDNS_MAX_DOMAINLEN+1];
1111 /* Check if this is unencrypted and asking for certs */
1112 if(worker_check_request(c->buffer, worker) != 0) {
1114 "dnscrypt: worker check request: bad query.");
1115 log_addr(VERB_CLIENT,"from",&repinfo->addr,
1117 comm_point_drop_reply(repinfo);
1120 if(!query_info_parse(&qinfo, c->buffer)) {
1122 "dnscrypt: worker parse request: formerror.");
1123 log_addr(VERB_CLIENT, "from", &repinfo->addr,
1125 comm_point_drop_reply(repinfo);
1128 dname_str(qinfo.qname, buf);
1129 if(!(qinfo.qtype == LDNS_RR_TYPE_TXT &&
1131 worker->daemon->dnscenv->provider_name) == 0)) {
1133 "dnscrypt: not TXT \"%s\". Received: %s \"%s\"",
1134 worker->daemon->dnscenv->provider_name,
1135 sldns_rr_descript(qinfo.qtype)->_name,
1137 comm_point_drop_reply(repinfo);
1138 worker->stats.num_query_dnscrypt_cleartext++;
1141 worker->stats.num_query_dnscrypt_cert++;
1142 sldns_buffer_rewind(c->buffer);
1143 } else if(c->dnscrypt && repinfo->is_dnscrypted) {
1144 worker->stats.num_query_dnscrypt_crypted++;
1148 if(worker->dtenv.log_client_query_messages)
1149 dt_msg_send_client_query(&worker->dtenv, &repinfo->addr, c->type,
1152 acladdr = acl_addr_lookup(worker->daemon->acl, &repinfo->addr,
1154 acl = acl_get_control(acladdr);
1155 if((ret=deny_refuse_all(c, acl, worker, repinfo)) != -1)
1161 if((ret=worker_check_request(c->buffer, worker)) != 0) {
1162 verbose(VERB_ALGO, "worker check request: bad query.");
1163 log_addr(VERB_CLIENT,"from",&repinfo->addr, repinfo->addrlen);
1165 LDNS_QR_SET(sldns_buffer_begin(c->buffer));
1166 LDNS_RCODE_SET(sldns_buffer_begin(c->buffer), ret);
1169 comm_point_drop_reply(repinfo);
1173 worker->stats.num_queries++;
1175 /* check if this query should be dropped based on source ip rate limiting */
1176 if(!infra_ip_ratelimit_inc(worker->env.infra_cache, repinfo,
1177 *worker->env.now, c->buffer)) {
1178 /* See if we are passed through with slip factor */
1179 if(worker->env.cfg->ip_ratelimit_factor != 0 &&
1180 ub_random_max(worker->env.rnd,
1181 worker->env.cfg->ip_ratelimit_factor) == 0) {
1184 addr_to_str(&repinfo->addr, repinfo->addrlen,
1185 addrbuf, sizeof(addrbuf));
1186 verbose(VERB_QUERY, "ip_ratelimit allowed through for ip address %s because of slip in ip_ratelimit_factor",
1189 worker->stats.num_queries_ip_ratelimited++;
1190 comm_point_drop_reply(repinfo);
1195 /* see if query is in the cache */
1196 if(!query_info_parse(&qinfo, c->buffer)) {
1197 verbose(VERB_ALGO, "worker parse request: formerror.");
1198 log_addr(VERB_CLIENT,"from",&repinfo->addr, repinfo->addrlen);
1199 memset(&qinfo, 0, sizeof(qinfo)); /* zero qinfo.qname */
1200 if(worker_err_ratelimit(worker, LDNS_RCODE_FORMERR) == -1) {
1201 comm_point_drop_reply(repinfo);
1204 sldns_buffer_rewind(c->buffer);
1205 LDNS_QR_SET(sldns_buffer_begin(c->buffer));
1206 LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
1207 LDNS_RCODE_FORMERR);
1208 server_stats_insrcode(&worker->stats, c->buffer);
1211 if(worker->env.cfg->log_queries) {
1213 addr_to_str(&repinfo->addr, repinfo->addrlen, ip, sizeof(ip));
1214 log_query_in(ip, qinfo.qname, qinfo.qtype, qinfo.qclass);
1216 if(qinfo.qtype == LDNS_RR_TYPE_AXFR ||
1217 qinfo.qtype == LDNS_RR_TYPE_IXFR) {
1218 verbose(VERB_ALGO, "worker request: refused zone transfer.");
1219 log_addr(VERB_CLIENT,"from",&repinfo->addr, repinfo->addrlen);
1220 sldns_buffer_rewind(c->buffer);
1221 LDNS_QR_SET(sldns_buffer_begin(c->buffer));
1222 LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
1223 LDNS_RCODE_REFUSED);
1224 if(worker->stats.extended) {
1225 worker->stats.qtype[qinfo.qtype]++;
1226 server_stats_insrcode(&worker->stats, c->buffer);
1230 if(qinfo.qtype == LDNS_RR_TYPE_OPT ||
1231 qinfo.qtype == LDNS_RR_TYPE_TSIG ||
1232 qinfo.qtype == LDNS_RR_TYPE_TKEY ||
1233 qinfo.qtype == LDNS_RR_TYPE_MAILA ||
1234 qinfo.qtype == LDNS_RR_TYPE_MAILB ||
1235 (qinfo.qtype >= 128 && qinfo.qtype <= 248)) {
1236 verbose(VERB_ALGO, "worker request: formerror for meta-type.");
1237 log_addr(VERB_CLIENT,"from",&repinfo->addr, repinfo->addrlen);
1238 if(worker_err_ratelimit(worker, LDNS_RCODE_FORMERR) == -1) {
1239 comm_point_drop_reply(repinfo);
1242 sldns_buffer_rewind(c->buffer);
1243 LDNS_QR_SET(sldns_buffer_begin(c->buffer));
1244 LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
1245 LDNS_RCODE_FORMERR);
1246 if(worker->stats.extended) {
1247 worker->stats.qtype[qinfo.qtype]++;
1248 server_stats_insrcode(&worker->stats, c->buffer);
1252 if((ret=parse_edns_from_pkt(c->buffer, &edns, worker->scratchpad)) != 0) {
1253 struct edns_data reply_edns;
1254 verbose(VERB_ALGO, "worker parse edns: formerror.");
1255 log_addr(VERB_CLIENT,"from",&repinfo->addr, repinfo->addrlen);
1256 memset(&reply_edns, 0, sizeof(reply_edns));
1257 reply_edns.edns_present = 1;
1258 reply_edns.udp_size = EDNS_ADVERTISED_SIZE;
1259 LDNS_RCODE_SET(sldns_buffer_begin(c->buffer), ret);
1260 error_encode(c->buffer, ret, &qinfo,
1261 *(uint16_t*)(void *)sldns_buffer_begin(c->buffer),
1262 sldns_buffer_read_u16_at(c->buffer, 2), &reply_edns);
1263 regional_free_all(worker->scratchpad);
1264 server_stats_insrcode(&worker->stats, c->buffer);
1267 if(edns.edns_present) {
1268 struct edns_option* edns_opt;
1269 if(edns.edns_version != 0) {
1270 edns.ext_rcode = (uint8_t)(EDNS_RCODE_BADVERS>>4);
1271 edns.edns_version = EDNS_ADVERTISED_VERSION;
1272 edns.udp_size = EDNS_ADVERTISED_SIZE;
1273 edns.bits &= EDNS_DO;
1274 edns.opt_list = NULL;
1275 verbose(VERB_ALGO, "query with bad edns version.");
1276 log_addr(VERB_CLIENT,"from",&repinfo->addr, repinfo->addrlen);
1277 error_encode(c->buffer, EDNS_RCODE_BADVERS&0xf, &qinfo,
1278 *(uint16_t*)(void *)sldns_buffer_begin(c->buffer),
1279 sldns_buffer_read_u16_at(c->buffer, 2), NULL);
1280 if(sldns_buffer_capacity(c->buffer) >=
1281 sldns_buffer_limit(c->buffer)+calc_edns_field_size(&edns))
1282 attach_edns_record(c->buffer, &edns);
1283 regional_free_all(worker->scratchpad);
1286 if(edns.udp_size < NORMAL_UDP_SIZE &&
1287 worker->daemon->cfg->harden_short_bufsize) {
1288 verbose(VERB_QUERY, "worker request: EDNS bufsize %d ignored",
1289 (int)edns.udp_size);
1290 log_addr(VERB_CLIENT,"from",&repinfo->addr, repinfo->addrlen);
1291 edns.udp_size = NORMAL_UDP_SIZE;
1293 if(c->type != comm_udp) {
1294 edns_opt = edns_opt_list_find(edns.opt_list, LDNS_EDNS_KEEPALIVE);
1295 if(edns_opt && edns_opt->opt_len > 0) {
1297 edns.edns_version = EDNS_ADVERTISED_VERSION;
1298 edns.udp_size = EDNS_ADVERTISED_SIZE;
1299 edns.bits &= EDNS_DO;
1300 edns.opt_list = NULL;
1301 verbose(VERB_ALGO, "query with bad edns keepalive.");
1302 log_addr(VERB_CLIENT,"from",&repinfo->addr, repinfo->addrlen);
1303 error_encode(c->buffer, LDNS_RCODE_FORMERR, &qinfo,
1304 *(uint16_t*)(void *)sldns_buffer_begin(c->buffer),
1305 sldns_buffer_read_u16_at(c->buffer, 2), NULL);
1306 if(sldns_buffer_capacity(c->buffer) >=
1307 sldns_buffer_limit(c->buffer)+calc_edns_field_size(&edns))
1308 attach_edns_record(c->buffer, &edns);
1309 regional_free_all(worker->scratchpad);
1314 if(edns.udp_size > worker->daemon->cfg->max_udp_size &&
1315 c->type == comm_udp) {
1317 "worker request: max UDP reply size modified"
1318 " (%d to max-udp-size)", (int)edns.udp_size);
1319 log_addr(VERB_CLIENT,"from",&repinfo->addr, repinfo->addrlen);
1320 edns.udp_size = worker->daemon->cfg->max_udp_size;
1322 if(edns.udp_size < LDNS_HEADER_SIZE) {
1323 verbose(VERB_ALGO, "worker request: edns is too small.");
1324 log_addr(VERB_CLIENT, "from", &repinfo->addr, repinfo->addrlen);
1325 LDNS_QR_SET(sldns_buffer_begin(c->buffer));
1326 LDNS_TC_SET(sldns_buffer_begin(c->buffer));
1327 LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
1328 LDNS_RCODE_SERVFAIL);
1329 sldns_buffer_set_position(c->buffer, LDNS_HEADER_SIZE);
1330 sldns_buffer_write_at(c->buffer, 4,
1331 (uint8_t*)"\0\0\0\0\0\0\0\0", 8);
1332 sldns_buffer_flip(c->buffer);
1333 regional_free_all(worker->scratchpad);
1336 if(worker->stats.extended)
1337 server_stats_insquery(&worker->stats, c, qinfo.qtype,
1338 qinfo.qclass, &edns, repinfo);
1339 if(c->type != comm_udp)
1340 edns.udp_size = 65535; /* max size for TCP replies */
1341 if(qinfo.qclass == LDNS_RR_CLASS_CH && answer_chaos(worker, &qinfo,
1342 &edns, repinfo, c->buffer)) {
1343 server_stats_insrcode(&worker->stats, c->buffer);
1344 regional_free_all(worker->scratchpad);
1347 if(LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) ==
1348 LDNS_PACKET_NOTIFY) {
1349 answer_notify(worker, &qinfo, &edns, c->buffer, repinfo);
1350 regional_free_all(worker->scratchpad);
1353 if(local_zones_answer(worker->daemon->local_zones, &worker->env, &qinfo,
1354 &edns, c->buffer, worker->scratchpad, repinfo, acladdr->taglist,
1355 acladdr->taglen, acladdr->tag_actions,
1356 acladdr->tag_actions_size, acladdr->tag_datas,
1357 acladdr->tag_datas_size, worker->daemon->cfg->tagname,
1358 worker->daemon->cfg->num_tags, acladdr->view)) {
1359 regional_free_all(worker->scratchpad);
1360 if(sldns_buffer_limit(c->buffer) == 0) {
1361 comm_point_drop_reply(repinfo);
1364 server_stats_insrcode(&worker->stats, c->buffer);
1367 if(worker->env.auth_zones &&
1368 auth_zones_answer(worker->env.auth_zones, &worker->env,
1369 &qinfo, &edns, repinfo, c->buffer, worker->scratchpad)) {
1370 regional_free_all(worker->scratchpad);
1371 if(sldns_buffer_limit(c->buffer) == 0) {
1372 comm_point_drop_reply(repinfo);
1375 /* set RA for everyone that can have recursion (based on
1376 * access control list) */
1377 if(LDNS_RD_WIRE(sldns_buffer_begin(c->buffer)) &&
1378 acl != acl_deny_non_local && acl != acl_refuse_non_local)
1379 LDNS_RA_SET(sldns_buffer_begin(c->buffer));
1380 server_stats_insrcode(&worker->stats, c->buffer);
1384 /* We've looked in our local zones. If the answer isn't there, we
1385 * might need to bail out based on ACLs now. */
1386 if((ret=deny_refuse_non_local(c, acl, worker, repinfo)) != -1)
1388 regional_free_all(worker->scratchpad);
1394 /* If this request does not have the recursion bit set, verify
1395 * ACLs allow the recursion bit to be treated as set. */
1396 if(!(LDNS_RD_WIRE(sldns_buffer_begin(c->buffer))) &&
1397 acl == acl_allow_setrd ) {
1398 LDNS_RD_SET(sldns_buffer_begin(c->buffer));
1401 /* If this request does not have the recursion bit set, verify
1402 * ACLs allow the snooping. */
1403 if(!(LDNS_RD_WIRE(sldns_buffer_begin(c->buffer))) &&
1404 acl != acl_allow_snoop ) {
1405 error_encode(c->buffer, LDNS_RCODE_REFUSED, &qinfo,
1406 *(uint16_t*)(void *)sldns_buffer_begin(c->buffer),
1407 sldns_buffer_read_u16_at(c->buffer, 2), NULL);
1408 regional_free_all(worker->scratchpad);
1409 server_stats_insrcode(&worker->stats, c->buffer);
1410 log_addr(VERB_ALGO, "refused nonrec (cache snoop) query from",
1411 &repinfo->addr, repinfo->addrlen);
1415 /* If we've found a local alias, replace the qname with the alias
1416 * target before resolving it. */
1417 if(qinfo.local_alias) {
1418 struct ub_packed_rrset_key* rrset = qinfo.local_alias->rrset;
1419 struct packed_rrset_data* d = rrset->entry.data;
1421 /* Sanity check: our current implementation only supports
1422 * a single CNAME RRset as a local alias. */
1423 if(qinfo.local_alias->next ||
1424 rrset->rk.type != htons(LDNS_RR_TYPE_CNAME) ||
1426 log_err("assumption failure: unexpected local alias");
1427 regional_free_all(worker->scratchpad);
1428 return 0; /* drop it */
1430 qinfo.qname = d->rr_data[0] + 2;
1431 qinfo.qname_len = d->rr_len[0] - 2;
1434 /* If we may apply IP-based actions to the answer, build the client
1435 * information. As this can be expensive, skip it if there is
1436 * absolutely no possibility of it. */
1437 if(worker->daemon->use_response_ip &&
1438 (qinfo.qtype == LDNS_RR_TYPE_A ||
1439 qinfo.qtype == LDNS_RR_TYPE_AAAA ||
1440 qinfo.qtype == LDNS_RR_TYPE_ANY)) {
1441 cinfo_tmp.taglist = acladdr->taglist;
1442 cinfo_tmp.taglen = acladdr->taglen;
1443 cinfo_tmp.tag_actions = acladdr->tag_actions;
1444 cinfo_tmp.tag_actions_size = acladdr->tag_actions_size;
1445 cinfo_tmp.tag_datas = acladdr->tag_datas;
1446 cinfo_tmp.tag_datas_size = acladdr->tag_datas_size;
1447 cinfo_tmp.view = acladdr->view;
1448 cinfo_tmp.respip_set = worker->daemon->respip_set;
1453 /* Lookup the cache. In case we chase an intermediate CNAME chain
1454 * this is a two-pass operation, and lookup_qinfo is different for
1455 * each pass. We should still pass the original qinfo to
1456 * answer_from_cache(), however, since it's used to build the reply. */
1457 if(!edns_bypass_cache_stage(edns.opt_list, &worker->env)) {
1458 h = query_info_hash(lookup_qinfo, sldns_buffer_read_u16_at(c->buffer, 2));
1459 if((e=slabhash_lookup(worker->env.msg_cache, h, lookup_qinfo, 0))) {
1460 /* answer from cache - we have acquired a readlock on it */
1461 if(answer_from_cache(worker, &qinfo,
1462 cinfo, &need_drop, &alias_rrset, &partial_rep,
1463 (struct reply_info*)e->data,
1464 *(uint16_t*)(void *)sldns_buffer_begin(c->buffer),
1465 sldns_buffer_read_u16_at(c->buffer, 2), repinfo,
1467 /* prefetch it if the prefetch TTL expired.
1468 * Note that if there is more than one pass
1469 * its qname must be that used for cache
1471 if((worker->env.cfg->prefetch || worker->env.cfg->serve_expired)
1472 && *worker->env.now >=
1473 ((struct reply_info*)e->data)->prefetch_ttl) {
1474 time_t leeway = ((struct reply_info*)e->
1475 data)->ttl - *worker->env.now;
1476 if(((struct reply_info*)e->data)->ttl
1479 lock_rw_unlock(&e->lock);
1480 reply_and_prefetch(worker, lookup_qinfo,
1481 sldns_buffer_read_u16_at(c->buffer, 2),
1483 (partial_rep || need_drop));
1486 regional_free_all(worker->scratchpad);
1489 } else if(!partial_rep) {
1490 lock_rw_unlock(&e->lock);
1491 regional_free_all(worker->scratchpad);
1494 /* Note that we've already released the
1495 * lock if we're here after prefetch. */
1496 lock_rw_unlock(&e->lock);
1498 /* We've found a partial reply ending with an
1499 * alias. Replace the lookup qinfo for the
1500 * alias target and lookup the cache again to
1501 * (possibly) complete the reply. As we're
1502 * passing the "base" reply, there will be no
1503 * more alias chasing. */
1504 memset(&qinfo_tmp, 0, sizeof(qinfo_tmp));
1505 get_cname_target(alias_rrset, &qinfo_tmp.qname,
1506 &qinfo_tmp.qname_len);
1507 if(!qinfo_tmp.qname) {
1508 log_err("unexpected: invalid answer alias");
1509 regional_free_all(worker->scratchpad);
1510 return 0; /* drop query */
1512 qinfo_tmp.qtype = qinfo.qtype;
1513 qinfo_tmp.qclass = qinfo.qclass;
1514 lookup_qinfo = &qinfo_tmp;
1517 verbose(VERB_ALGO, "answer from the cache failed");
1518 lock_rw_unlock(&e->lock);
1520 if(!LDNS_RD_WIRE(sldns_buffer_begin(c->buffer))) {
1521 if(answer_norec_from_cache(worker, &qinfo,
1522 *(uint16_t*)(void *)sldns_buffer_begin(c->buffer),
1523 sldns_buffer_read_u16_at(c->buffer, 2), repinfo,
1525 regional_free_all(worker->scratchpad);
1528 verbose(VERB_ALGO, "answer norec from cache -- "
1529 "need to validate or not primed");
1532 sldns_buffer_rewind(c->buffer);
1533 server_stats_querymiss(&worker->stats, worker);
1535 if(verbosity >= VERB_CLIENT) {
1536 if(c->type == comm_udp)
1537 log_addr(VERB_CLIENT, "udp request from",
1538 &repinfo->addr, repinfo->addrlen);
1539 else log_addr(VERB_CLIENT, "tcp request from",
1540 &repinfo->addr, repinfo->addrlen);
1543 /* grab a work request structure for this new request */
1544 mesh_new_client(worker->env.mesh, &qinfo, cinfo,
1545 sldns_buffer_read_u16_at(c->buffer, 2),
1546 &edns, repinfo, *(uint16_t*)(void *)sldns_buffer_begin(c->buffer));
1547 regional_free_all(worker->scratchpad);
1548 worker_mem_report(worker, NULL);
1555 comm_point_drop_reply(repinfo);
1559 if(worker->dtenv.log_client_response_messages)
1560 dt_msg_send_client_response(&worker->dtenv, &repinfo->addr,
1561 c->type, c->buffer);
1563 if(worker->env.cfg->log_replies)
1566 memset(&tv, 0, sizeof(tv));
1567 if(qinfo.local_alias && qinfo.local_alias->rrset &&
1568 qinfo.local_alias->rrset->rk.dname) {
1569 /* log original qname, before the local alias was
1570 * used to resolve that CNAME to something else */
1571 qinfo.qname = qinfo.local_alias->rrset->rk.dname;
1572 log_reply_info(NO_VERBOSE, &qinfo, &repinfo->addr, repinfo->addrlen,
1575 log_reply_info(NO_VERBOSE, &qinfo, &repinfo->addr, repinfo->addrlen,
1580 if(!dnsc_handle_uncurved_request(repinfo)) {
1588 worker_sighandler(int sig, void* arg)
1590 /* note that log, print, syscalls here give race conditions.
1591 * And cause hangups if the log-lock is held by the application. */
1592 struct worker* worker = (struct worker*)arg;
1596 comm_base_exit(worker->base);
1600 worker->need_to_exit = 1;
1601 comm_base_exit(worker->base);
1605 worker->need_to_exit = 1;
1606 comm_base_exit(worker->base);
1610 worker->need_to_exit = 1;
1611 comm_base_exit(worker->base);
1614 /* unknown signal, ignored */
1619 /** restart statistics timer for worker, if enabled */
1621 worker_restart_timer(struct worker* worker)
1623 if(worker->env.cfg->stat_interval > 0) {
1626 tv.tv_sec = worker->env.cfg->stat_interval;
1629 comm_timer_set(worker->stat_timer, &tv);
1633 void worker_stat_timer_cb(void* arg)
1635 struct worker* worker = (struct worker*)arg;
1636 server_stats_log(&worker->stats, worker, worker->thread_num);
1637 mesh_stats(worker->env.mesh, "mesh has");
1638 worker_mem_report(worker, NULL);
1639 /* SHM is enabled, process data to SHM */
1640 if (worker->daemon->cfg->shm_enable) {
1641 shm_main_run(worker);
1643 if(!worker->daemon->cfg->stat_cumulative) {
1644 worker_stats_clear(worker);
1646 /* start next timer */
1647 worker_restart_timer(worker);
1650 void worker_probe_timer_cb(void* arg)
1652 struct worker* worker = (struct worker*)arg;
1655 tv.tv_sec = (time_t)autr_probe_timer(&worker->env);
1659 comm_timer_set(worker->env.probe_timer, &tv);
1663 worker_create(struct daemon* daemon, int id, int* ports, int n)
1666 struct worker* worker = (struct worker*)calloc(1,
1667 sizeof(struct worker));
1670 worker->numports = n;
1671 worker->ports = (int*)memdup(ports, sizeof(int)*n);
1672 if(!worker->ports) {
1676 worker->daemon = daemon;
1677 worker->thread_num = id;
1678 if(!(worker->cmd = tube_create())) {
1679 free(worker->ports);
1683 /* create random state here to avoid locking trouble in RAND_bytes */
1684 if(!(worker->rndstate = ub_initstate(daemon->rand))) {
1685 log_err("could not init random numbers.");
1686 tube_delete(worker->cmd);
1687 free(worker->ports);
1691 explicit_bzero(&seed, sizeof(seed));
1693 if(daemon->cfg->dnstap) {
1694 log_assert(daemon->dtenv != NULL);
1695 memcpy(&worker->dtenv, daemon->dtenv, sizeof(struct dt_env));
1696 if(!dt_init(&worker->dtenv))
1697 fatal_exit("dt_init failed");
1704 worker_init(struct worker* worker, struct config_file *cfg,
1705 struct listen_port* ports, int do_sigs)
1708 struct dt_env* dtenv = &worker->dtenv;
1712 worker->need_to_exit = 0;
1713 worker->base = comm_base_create(do_sigs);
1715 log_err("could not create event handling base");
1716 worker_delete(worker);
1719 comm_base_set_slow_accept_handlers(worker->base, &worker_stop_accept,
1720 &worker_start_accept, worker);
1723 ub_thread_sig_unblock(SIGHUP);
1725 ub_thread_sig_unblock(SIGINT);
1727 ub_thread_sig_unblock(SIGQUIT);
1729 ub_thread_sig_unblock(SIGTERM);
1730 #ifndef LIBEVENT_SIGNAL_PROBLEM
1731 worker->comsig = comm_signal_create(worker->base,
1732 worker_sighandler, worker);
1735 || !comm_signal_bind(worker->comsig, SIGHUP)
1738 || !comm_signal_bind(worker->comsig, SIGQUIT)
1740 || !comm_signal_bind(worker->comsig, SIGTERM)
1741 || !comm_signal_bind(worker->comsig, SIGINT)) {
1742 log_err("could not create signal handlers");
1743 worker_delete(worker);
1746 #endif /* LIBEVENT_SIGNAL_PROBLEM */
1747 if(!daemon_remote_open_accept(worker->daemon->rc,
1748 worker->daemon->rc_ports, worker)) {
1749 worker_delete(worker);
1752 #ifdef UB_ON_WINDOWS
1753 wsvc_setup_worker(worker);
1754 #endif /* UB_ON_WINDOWS */
1755 } else { /* !do_sigs */
1756 worker->comsig = NULL;
1758 worker->front = listen_create(worker->base, ports,
1759 cfg->msg_buffer_size, (int)cfg->incoming_num_tcp,
1760 cfg->do_tcp_keepalive
1761 ? cfg->tcp_keepalive_timeout
1762 : cfg->tcp_idle_timeout,
1763 worker->daemon->tcl,
1764 worker->daemon->listen_sslctx,
1765 dtenv, worker_handle_request, worker);
1766 if(!worker->front) {
1767 log_err("could not create listening sockets");
1768 worker_delete(worker);
1771 worker->back = outside_network_create(worker->base,
1772 cfg->msg_buffer_size, (size_t)cfg->outgoing_num_ports,
1773 cfg->out_ifs, cfg->num_out_ifs, cfg->do_ip4, cfg->do_ip6,
1774 cfg->do_tcp?cfg->outgoing_num_tcp:0,
1775 worker->daemon->env->infra_cache, worker->rndstate,
1776 cfg->use_caps_bits_for_id, worker->ports, worker->numports,
1777 cfg->unwanted_threshold, cfg->outgoing_tcp_mss,
1778 &worker_alloc_cleanup, worker,
1779 cfg->do_udp || cfg->udp_upstream_without_downstream,
1780 worker->daemon->connect_sslctx, cfg->delay_close,
1783 log_err("could not create outgoing sockets");
1784 worker_delete(worker);
1787 /* start listening to commands */
1788 if(!tube_setup_bg_listen(worker->cmd, worker->base,
1789 &worker_handle_control_cmd, worker)) {
1790 log_err("could not create control compt.");
1791 worker_delete(worker);
1794 worker->stat_timer = comm_timer_create(worker->base,
1795 worker_stat_timer_cb, worker);
1796 if(!worker->stat_timer) {
1797 log_err("could not create statistics timer");
1800 /* we use the msg_buffer_size as a good estimate for what the
1801 * user wants for memory usage sizes */
1802 worker->scratchpad = regional_create_custom(cfg->msg_buffer_size);
1803 if(!worker->scratchpad) {
1804 log_err("malloc failure");
1805 worker_delete(worker);
1809 server_stats_init(&worker->stats, cfg);
1810 alloc_init(&worker->alloc, &worker->daemon->superalloc,
1811 worker->thread_num);
1812 alloc_set_id_cleanup(&worker->alloc, &worker_alloc_cleanup, worker);
1813 worker->env = *worker->daemon->env;
1814 comm_base_timept(worker->base, &worker->env.now, &worker->env.now_tv);
1815 worker->env.worker = worker;
1816 worker->env.worker_base = worker->base;
1817 worker->env.send_query = &worker_send_query;
1818 worker->env.alloc = &worker->alloc;
1819 worker->env.outnet = worker->back;
1820 worker->env.rnd = worker->rndstate;
1821 /* If case prefetch is triggered, the corresponding mesh will clear
1822 * the scratchpad for the module env in the middle of request handling.
1823 * It would be prone to a use-after-free kind of bug, so we avoid
1824 * sharing it with worker's own scratchpad at the cost of having
1825 * one more pad per worker. */
1826 worker->env.scratch = regional_create_custom(cfg->msg_buffer_size);
1827 if(!worker->env.scratch) {
1828 log_err("malloc failure");
1829 worker_delete(worker);
1832 worker->env.mesh = mesh_create(&worker->daemon->mods, &worker->env);
1833 worker->env.detach_subs = &mesh_detach_subs;
1834 worker->env.attach_sub = &mesh_attach_sub;
1835 worker->env.add_sub = &mesh_add_sub;
1836 worker->env.kill_sub = &mesh_state_delete;
1837 worker->env.detect_cycle = &mesh_detect_cycle;
1838 worker->env.scratch_buffer = sldns_buffer_new(cfg->msg_buffer_size);
1839 if(!(worker->env.fwds = forwards_create()) ||
1840 !forwards_apply_cfg(worker->env.fwds, cfg)) {
1841 log_err("Could not set forward zones");
1842 worker_delete(worker);
1845 if(!(worker->env.hints = hints_create()) ||
1846 !hints_apply_cfg(worker->env.hints, cfg)) {
1847 log_err("Could not set root or stub hints");
1848 worker_delete(worker);
1851 /* one probe timer per process -- if we have 5011 anchors */
1852 if(autr_get_num_anchors(worker->env.anchors) > 0
1853 #ifndef THREADS_DISABLED
1854 && worker->thread_num == 0
1860 worker->env.probe_timer = comm_timer_create(worker->base,
1861 worker_probe_timer_cb, worker);
1862 if(!worker->env.probe_timer) {
1863 log_err("could not create 5011-probe timer");
1865 /* let timer fire, then it can reset itself */
1866 comm_timer_set(worker->env.probe_timer, &tv);
1869 /* zone transfer tasks, setup once per process, if any */
1870 if(worker->env.auth_zones
1871 #ifndef THREADS_DISABLED
1872 && worker->thread_num == 0
1875 auth_xfer_pickup_initial(worker->env.auth_zones, &worker->env);
1877 if(!worker->env.mesh || !worker->env.scratch_buffer) {
1878 worker_delete(worker);
1881 worker_mem_report(worker, NULL);
1882 /* if statistics enabled start timer */
1883 if(worker->env.cfg->stat_interval > 0) {
1884 verbose(VERB_ALGO, "set statistics interval %d secs",
1885 worker->env.cfg->stat_interval);
1886 worker_restart_timer(worker);
1892 worker_work(struct worker* worker)
1894 comm_base_dispatch(worker->base);
1898 worker_delete(struct worker* worker)
1902 if(worker->env.mesh && verbosity >= VERB_OPS) {
1903 server_stats_log(&worker->stats, worker, worker->thread_num);
1904 mesh_stats(worker->env.mesh, "mesh has");
1905 worker_mem_report(worker, NULL);
1907 outside_network_quit_prepare(worker->back);
1908 mesh_delete(worker->env.mesh);
1909 sldns_buffer_free(worker->env.scratch_buffer);
1910 forwards_delete(worker->env.fwds);
1911 hints_delete(worker->env.hints);
1912 listen_delete(worker->front);
1913 outside_network_delete(worker->back);
1914 comm_signal_delete(worker->comsig);
1915 tube_delete(worker->cmd);
1916 comm_timer_delete(worker->stat_timer);
1917 comm_timer_delete(worker->env.probe_timer);
1918 free(worker->ports);
1919 if(worker->thread_num == 0) {
1920 #ifdef UB_ON_WINDOWS
1921 wsvc_desetup_worker(worker);
1922 #endif /* UB_ON_WINDOWS */
1924 comm_base_delete(worker->base);
1925 ub_randfree(worker->rndstate);
1926 alloc_clear(&worker->alloc);
1927 regional_destroy(worker->env.scratch);
1928 regional_destroy(worker->scratchpad);
1932 struct outbound_entry*
1933 worker_send_query(struct query_info* qinfo, uint16_t flags, int dnssec,
1934 int want_dnssec, int nocaps, struct sockaddr_storage* addr,
1935 socklen_t addrlen, uint8_t* zone, size_t zonelen, int ssl_upstream,
1936 char* tls_auth_name, struct module_qstate* q)
1938 struct worker* worker = q->env->worker;
1939 struct outbound_entry* e = (struct outbound_entry*)regional_alloc(
1940 q->region, sizeof(*e));
1944 e->qsent = outnet_serviced_query(worker->back, qinfo, flags, dnssec,
1945 want_dnssec, nocaps, q->env->cfg->tcp_upstream,
1946 ssl_upstream, tls_auth_name, addr, addrlen, zone, zonelen, q,
1947 worker_handle_service_reply, e, worker->back->udp_buff, q->env);
1955 worker_alloc_cleanup(void* arg)
1957 struct worker* worker = (struct worker*)arg;
1958 slabhash_clear(&worker->env.rrset_cache->table);
1959 slabhash_clear(worker->env.msg_cache);
1962 void worker_stats_clear(struct worker* worker)
1964 server_stats_init(&worker->stats, worker->env.cfg);
1965 mesh_stats_clear(worker->env.mesh);
1966 worker->back->unwanted_replies = 0;
1967 worker->back->num_tcp_outgoing = 0;
1970 void worker_start_accept(void* arg)
1972 struct worker* worker = (struct worker*)arg;
1973 listen_start_accept(worker->front);
1974 if(worker->thread_num == 0)
1975 daemon_remote_start_accept(worker->daemon->rc);
1978 void worker_stop_accept(void* arg)
1980 struct worker* worker = (struct worker*)arg;
1981 listen_stop_accept(worker->front);
1982 if(worker->thread_num == 0)
1983 daemon_remote_stop_accept(worker->daemon->rc);
1986 /* --- fake callbacks for fptr_wlist to work --- */
1987 struct outbound_entry* libworker_send_query(
1988 struct query_info* ATTR_UNUSED(qinfo),
1989 uint16_t ATTR_UNUSED(flags), int ATTR_UNUSED(dnssec),
1990 int ATTR_UNUSED(want_dnssec), int ATTR_UNUSED(nocaps),
1991 struct sockaddr_storage* ATTR_UNUSED(addr), socklen_t ATTR_UNUSED(addrlen),
1992 uint8_t* ATTR_UNUSED(zone), size_t ATTR_UNUSED(zonelen),
1993 int ATTR_UNUSED(ssl_upstream), char* ATTR_UNUSED(tls_auth_name),
1994 struct module_qstate* ATTR_UNUSED(q))
2000 int libworker_handle_reply(struct comm_point* ATTR_UNUSED(c),
2001 void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
2002 struct comm_reply* ATTR_UNUSED(reply_info))
2008 int libworker_handle_service_reply(struct comm_point* ATTR_UNUSED(c),
2009 void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
2010 struct comm_reply* ATTR_UNUSED(reply_info))
2016 void libworker_handle_control_cmd(struct tube* ATTR_UNUSED(tube),
2017 uint8_t* ATTR_UNUSED(buffer), size_t ATTR_UNUSED(len),
2018 int ATTR_UNUSED(error), void* ATTR_UNUSED(arg))
2023 void libworker_fg_done_cb(void* ATTR_UNUSED(arg), int ATTR_UNUSED(rcode),
2024 sldns_buffer* ATTR_UNUSED(buf), enum sec_status ATTR_UNUSED(s),
2025 char* ATTR_UNUSED(why_bogus), int ATTR_UNUSED(was_ratelimited))
2030 void libworker_bg_done_cb(void* ATTR_UNUSED(arg), int ATTR_UNUSED(rcode),
2031 sldns_buffer* ATTR_UNUSED(buf), enum sec_status ATTR_UNUSED(s),
2032 char* ATTR_UNUSED(why_bogus), int ATTR_UNUSED(was_ratelimited))
2037 void libworker_event_done_cb(void* ATTR_UNUSED(arg), int ATTR_UNUSED(rcode),
2038 sldns_buffer* ATTR_UNUSED(buf), enum sec_status ATTR_UNUSED(s),
2039 char* ATTR_UNUSED(why_bogus), int ATTR_UNUSED(was_ratelimited))
2044 int context_query_cmp(const void* ATTR_UNUSED(a), const void* ATTR_UNUSED(b))
2050 int order_lock_cmp(const void* ATTR_UNUSED(e1), const void* ATTR_UNUSED(e2))
2056 int codeline_cmp(const void* ATTR_UNUSED(a), const void* ATTR_UNUSED(b))