2 * services/localzone.c - local zones authority service.
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 contains functions to enable local zone authority service.
42 #include "services/localzone.h"
43 #include "sldns/str2wire.h"
44 #include "sldns/sbuffer.h"
45 #include "util/regional.h"
46 #include "util/config_file.h"
47 #include "util/data/dname.h"
48 #include "util/data/packed_rrset.h"
49 #include "util/data/msgencode.h"
50 #include "util/net_help.h"
51 #include "util/netevent.h"
52 #include "util/data/msgreply.h"
53 #include "util/data/msgparse.h"
54 #include "util/as112.h"
56 /* maximum RRs in an RRset, to cap possible 'endless' list RRs.
57 * with 16 bytes for an A record, a 64K packet has about 4000 max */
58 #define LOCALZONE_RRSET_COUNT_MAX 4096
61 local_zones_create(void)
63 struct local_zones* zones = (struct local_zones*)calloc(1,
67 rbtree_init(&zones->ztree, &local_zone_cmp);
68 lock_rw_init(&zones->lock);
69 lock_protect(&zones->lock, &zones->ztree, sizeof(zones->ztree));
70 /* also lock protects the rbnode's in struct local_zone */
74 /** helper traverse to delete zones */
76 lzdel(rbnode_type* n, void* ATTR_UNUSED(arg))
78 struct local_zone* z = (struct local_zone*)n->key;
83 local_zones_delete(struct local_zones* zones)
87 lock_rw_destroy(&zones->lock);
88 /* walk through zones and delete them all */
89 traverse_postorder(&zones->ztree, lzdel, NULL);
94 local_zone_delete(struct local_zone* z)
98 lock_rw_destroy(&z->lock);
99 regional_destroy(z->region);
106 local_zone_cmp(const void* z1, const void* z2)
108 /* first sort on class, so that hierarchy can be maintained within
110 struct local_zone* a = (struct local_zone*)z1;
111 struct local_zone* b = (struct local_zone*)z2;
113 if(a->dclass != b->dclass) {
114 if(a->dclass < b->dclass)
118 return dname_lab_cmp(a->name, a->namelabs, b->name, b->namelabs, &m);
122 local_data_cmp(const void* d1, const void* d2)
124 struct local_data* a = (struct local_data*)d1;
125 struct local_data* b = (struct local_data*)d2;
127 return dname_canon_lab_cmp(a->name, a->namelabs, b->name,
131 /* form wireformat from text format domain name */
133 parse_dname(const char* str, uint8_t** res, size_t* len, int* labs)
135 *res = sldns_str2wire_dname(str, len);
138 log_err("cannot parse name %s", str);
141 *labs = dname_count_size_labels(*res, len);
145 /** create a new localzone */
146 static struct local_zone*
147 local_zone_create(uint8_t* nm, size_t len, int labs,
148 enum localzone_type t, uint16_t dclass)
150 struct local_zone* z = (struct local_zone*)calloc(1, sizeof(*z));
160 lock_rw_init(&z->lock);
161 z->region = regional_create_custom(sizeof(struct regional));
166 rbtree_init(&z->data, &local_data_cmp);
167 lock_protect(&z->lock, &z->parent, sizeof(*z)-sizeof(rbnode_type));
168 /* also the zones->lock protects node, parent, name*, class */
172 /** enter a new zone with allocated dname returns with WRlock */
173 static struct local_zone*
174 lz_enter_zone_dname(struct local_zones* zones, uint8_t* nm, size_t len,
175 int labs, enum localzone_type t, uint16_t c)
177 struct local_zone* z = local_zone_create(nm, len, labs, t, c);
180 log_err("out of memory");
185 lock_rw_wrlock(&zones->lock);
186 lock_rw_wrlock(&z->lock);
187 if(!rbtree_insert(&zones->ztree, &z->node)) {
188 struct local_zone* oldz;
191 log_warn("duplicate local-zone %s", str);
192 lock_rw_unlock(&z->lock);
193 /* save zone name locally before deallocation,
194 * otherwise, nm is gone if we zone_delete now. */
196 /* find the correct zone, so not an error for duplicate */
197 z = local_zones_find(zones, nm, len, labs, c);
198 lock_rw_wrlock(&z->lock);
199 lock_rw_unlock(&zones->lock);
200 local_zone_delete(oldz);
203 lock_rw_unlock(&zones->lock);
207 /** enter a new zone */
208 static struct local_zone*
209 lz_enter_zone(struct local_zones* zones, const char* name, const char* type,
212 struct local_zone* z;
213 enum localzone_type t;
217 if(!parse_dname(name, &nm, &len, &labs)) {
218 log_err("bad zone name %s %s", name, type);
221 if(!local_zone_str2type(type, &t)) {
222 log_err("bad lz_enter_zone type %s %s", name, type);
226 if(!(z=lz_enter_zone_dname(zones, nm, len, labs, t, dclass))) {
227 log_err("could not enter zone %s %s", name, type);
234 rrstr_get_rr_content(const char* str, uint8_t** nm, uint16_t* type,
235 uint16_t* dclass, time_t* ttl, uint8_t* rr, size_t len,
236 uint8_t** rdata, size_t* rdata_len)
238 size_t dname_len = 0;
239 int e = sldns_str2wire_rr_buf(str, rr, &len, &dname_len, 3600,
242 log_err("error parsing local-data at %d: '%s': %s",
243 LDNS_WIREPARSE_OFFSET(e), str,
244 sldns_get_errorstr_parse(e));
247 *nm = memdup(rr, dname_len);
249 log_err("out of memory");
252 *dclass = sldns_wirerr_get_class(rr, len, dname_len);
253 *type = sldns_wirerr_get_type(rr, len, dname_len);
254 *ttl = (time_t)sldns_wirerr_get_ttl(rr, len, dname_len);
255 *rdata = sldns_wirerr_get_rdatawl(rr, len, dname_len);
256 *rdata_len = sldns_wirerr_get_rdatalen(rr, len, dname_len)+2;
260 /** return name and class of rr; parses string */
262 get_rr_nameclass(const char* str, uint8_t** nm, uint16_t* dclass,
265 uint8_t rr[LDNS_RR_BUF_SIZE];
266 size_t len = sizeof(rr), dname_len = 0;
267 int s = sldns_str2wire_rr_buf(str, rr, &len, &dname_len, 3600,
270 log_err("error parsing local-data at %d '%s': %s",
271 LDNS_WIREPARSE_OFFSET(s), str,
272 sldns_get_errorstr_parse(s));
275 *nm = memdup(rr, dname_len);
276 *dclass = sldns_wirerr_get_class(rr, len, dname_len);
277 *dtype = sldns_wirerr_get_type(rr, len, dname_len);
279 log_err("out of memory");
286 * Find an rrset in local data structure.
287 * @param data: local data domain name structure.
288 * @param type: type to look for (host order).
289 * @param alias_ok: 1 if matching a non-exact, alias type such as CNAME is
290 * allowed. otherwise 0.
291 * @return rrset pointer or NULL if not found.
293 static struct local_rrset*
294 local_data_find_type(struct local_data* data, uint16_t type, int alias_ok)
296 struct local_rrset* p;
298 for(p = data->rrsets; p; p = p->next) {
299 if(p->rrset->rk.type == type)
301 if(alias_ok && p->rrset->rk.type == htons(LDNS_RR_TYPE_CNAME))
307 /** check for RR duplicates */
309 rr_is_duplicate(struct packed_rrset_data* pd, uint8_t* rdata, size_t rdata_len)
312 for(i=0; i<pd->count; i++) {
313 if(pd->rr_len[i] == rdata_len &&
314 memcmp(pd->rr_data[i], rdata, rdata_len) == 0)
320 /** new local_rrset */
321 static struct local_rrset*
322 new_local_rrset(struct regional* region, struct local_data* node,
323 uint16_t rrtype, uint16_t rrclass)
325 struct packed_rrset_data* pd;
326 struct local_rrset* rrset = (struct local_rrset*)
327 regional_alloc_zero(region, sizeof(*rrset));
329 log_err("out of memory");
332 rrset->next = node->rrsets;
333 node->rrsets = rrset;
334 rrset->rrset = (struct ub_packed_rrset_key*)
335 regional_alloc_zero(region, sizeof(*rrset->rrset));
337 log_err("out of memory");
340 rrset->rrset->entry.key = rrset->rrset;
341 pd = (struct packed_rrset_data*)regional_alloc_zero(region,
344 log_err("out of memory");
347 pd->trust = rrset_trust_prim_noglue;
348 pd->security = sec_status_insecure;
349 rrset->rrset->entry.data = pd;
350 rrset->rrset->rk.dname = node->name;
351 rrset->rrset->rk.dname_len = node->namelen;
352 rrset->rrset->rk.type = htons(rrtype);
353 rrset->rrset->rk.rrset_class = htons(rrclass);
357 /** insert RR into RRset data structure; Wastes a couple of bytes */
359 rrset_insert_rr(struct regional* region, struct packed_rrset_data* pd,
360 uint8_t* rdata, size_t rdata_len, time_t ttl, const char* rrstr)
362 size_t* oldlen = pd->rr_len;
363 time_t* oldttl = pd->rr_ttl;
364 uint8_t** olddata = pd->rr_data;
366 /* add RR to rrset */
367 if(pd->count > LOCALZONE_RRSET_COUNT_MAX) {
368 log_warn("RRset '%s' has more than %d records, record ignored",
369 rrstr, LOCALZONE_RRSET_COUNT_MAX);
373 pd->rr_len = regional_alloc(region, sizeof(*pd->rr_len)*pd->count);
374 pd->rr_ttl = regional_alloc(region, sizeof(*pd->rr_ttl)*pd->count);
375 pd->rr_data = regional_alloc(region, sizeof(*pd->rr_data)*pd->count);
376 if(!pd->rr_len || !pd->rr_ttl || !pd->rr_data) {
377 log_err("out of memory");
381 memcpy(pd->rr_len+1, oldlen,
382 sizeof(*pd->rr_len)*(pd->count-1));
383 memcpy(pd->rr_ttl+1, oldttl,
384 sizeof(*pd->rr_ttl)*(pd->count-1));
385 memcpy(pd->rr_data+1, olddata,
386 sizeof(*pd->rr_data)*(pd->count-1));
388 pd->rr_len[0] = rdata_len;
390 pd->rr_data[0] = regional_alloc_init(region, rdata, rdata_len);
391 if(!pd->rr_data[0]) {
392 log_err("out of memory");
398 /** find a data node by exact name */
399 static struct local_data*
400 lz_find_node(struct local_zone* z, uint8_t* nm, size_t nmlen, int nmlabs)
402 struct local_data key;
406 key.namelabs = nmlabs;
407 return (struct local_data*)rbtree_search(&z->data, &key.node);
410 /** find a node, create it if not and all its empty nonterminal parents */
412 lz_find_create_node(struct local_zone* z, uint8_t* nm, size_t nmlen,
413 int nmlabs, struct local_data** res)
415 struct local_data* ld = lz_find_node(z, nm, nmlen, nmlabs);
417 /* create a domain name to store rr. */
418 ld = (struct local_data*)regional_alloc_zero(z->region,
421 log_err("out of memory adding local data");
425 ld->name = regional_alloc_init(z->region, nm, nmlen);
427 log_err("out of memory");
431 ld->namelabs = nmlabs;
432 if(!rbtree_insert(&z->data, &ld->node)) {
433 log_assert(0); /* duplicate name */
435 /* see if empty nonterminals need to be created */
436 if(nmlabs > z->namelabs) {
437 dname_remove_label(&nm, &nmlen);
438 if(!lz_find_create_node(z, nm, nmlen, nmlabs-1, res))
446 /** enter data RR into auth zone */
448 lz_enter_rr_into_zone(struct local_zone* z, const char* rrstr)
453 struct local_data* node;
454 struct local_rrset* rrset;
455 struct packed_rrset_data* pd;
456 uint16_t rrtype = 0, rrclass = 0;
458 uint8_t rr[LDNS_RR_BUF_SIZE];
461 if(!rrstr_get_rr_content(rrstr, &nm, &rrtype, &rrclass, &ttl, rr,
462 sizeof(rr), &rdata, &rdata_len)) {
463 log_err("bad local-data: %s", rrstr);
466 log_assert(z->dclass == rrclass);
467 if(z->type == local_zone_redirect &&
468 query_dname_compare(z->name, nm) != 0) {
469 log_err("local-data in redirect zone must reside at top of zone"
470 ", not at %s", rrstr);
474 nmlabs = dname_count_size_labels(nm, &nmlen);
475 if(!lz_find_create_node(z, nm, nmlen, nmlabs, &node)) {
482 /* Reject it if we would end up having CNAME and other data (including
483 * another CNAME) for a redirect zone. */
484 if(z->type == local_zone_redirect && node->rrsets) {
485 const char* othertype = NULL;
486 if (rrtype == LDNS_RR_TYPE_CNAME)
488 else if (node->rrsets->rrset->rk.type ==
489 htons(LDNS_RR_TYPE_CNAME)) {
493 log_err("local-data '%s' in redirect zone must not "
494 "coexist with %s local-data", rrstr, othertype);
498 rrset = local_data_find_type(node, rrtype, 0);
500 rrset = new_local_rrset(z->region, node, rrtype, rrclass);
503 if(query_dname_compare(node->name, z->name) == 0) {
504 if(rrtype == LDNS_RR_TYPE_NSEC)
505 rrset->rrset->rk.flags = PACKED_RRSET_NSEC_AT_APEX;
506 if(rrtype == LDNS_RR_TYPE_SOA)
507 z->soa = rrset->rrset;
510 pd = (struct packed_rrset_data*)rrset->rrset->entry.data;
511 log_assert(rrset && pd);
513 /* check for duplicate RR */
514 if(rr_is_duplicate(pd, rdata, rdata_len)) {
515 verbose(VERB_ALGO, "ignoring duplicate RR: %s", rrstr);
518 return rrset_insert_rr(z->region, pd, rdata, rdata_len, ttl, rrstr);
521 /** enter a data RR into auth data; a zone for it must exist */
523 lz_enter_rr_str(struct local_zones* zones, const char* rr)
526 uint16_t rr_class, rr_type;
529 struct local_zone* z;
531 if(!get_rr_nameclass(rr, &rr_name, &rr_class, &rr_type)) {
532 log_err("bad rr %s", rr);
535 labs = dname_count_size_labels(rr_name, &len);
536 lock_rw_rdlock(&zones->lock);
537 z = local_zones_lookup(zones, rr_name, len, labs, rr_class, rr_type);
539 lock_rw_unlock(&zones->lock);
540 fatal_exit("internal error: no zone for rr %s", rr);
542 lock_rw_wrlock(&z->lock);
543 lock_rw_unlock(&zones->lock);
545 r = lz_enter_rr_into_zone(z, rr);
546 lock_rw_unlock(&z->lock);
550 /** enter tagstring into zone */
552 lz_enter_zone_tag(struct local_zones* zones, char* zname, uint8_t* list,
553 size_t len, uint16_t rr_class)
555 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
556 size_t dname_len = sizeof(dname);
557 int dname_labs, r = 0;
558 struct local_zone* z;
560 if(sldns_str2wire_dname_buf(zname, dname, &dname_len) != 0) {
561 log_err("cannot parse zone name in local-zone-tag: %s", zname);
564 dname_labs = dname_count_labels(dname);
566 lock_rw_rdlock(&zones->lock);
567 z = local_zones_find(zones, dname, dname_len, dname_labs, rr_class);
569 lock_rw_unlock(&zones->lock);
570 log_err("no local-zone for tag %s", zname);
573 lock_rw_wrlock(&z->lock);
574 lock_rw_unlock(&zones->lock);
576 z->taglist = memdup(list, len);
580 lock_rw_unlock(&z->lock);
584 /** enter override into zone */
586 lz_enter_override(struct local_zones* zones, char* zname, char* netblock,
587 char* type, uint16_t rr_class)
589 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
590 size_t dname_len = sizeof(dname);
592 struct sockaddr_storage addr;
595 struct local_zone* z;
596 enum localzone_type t;
598 /* parse zone name */
599 if(sldns_str2wire_dname_buf(zname, dname, &dname_len) != 0) {
600 log_err("cannot parse zone name in local-zone-override: %s %s",
604 dname_labs = dname_count_labels(dname);
607 if(!netblockstrtoaddr(netblock, UNBOUND_DNS_PORT, &addr, &addrlen,
609 log_err("cannot parse netblock in local-zone-override: %s %s",
614 /* parse zone type */
615 if(!local_zone_str2type(type, &t)) {
616 log_err("cannot parse type in local-zone-override: %s %s %s",
617 zname, netblock, type);
621 /* find localzone entry */
622 lock_rw_rdlock(&zones->lock);
623 z = local_zones_find(zones, dname, dname_len, dname_labs, rr_class);
625 lock_rw_unlock(&zones->lock);
626 log_err("no local-zone for local-zone-override %s", zname);
629 lock_rw_wrlock(&z->lock);
630 lock_rw_unlock(&zones->lock);
632 /* create netblock addr_tree if not present yet */
633 if(!z->override_tree) {
634 z->override_tree = (struct rbtree_type*)regional_alloc_zero(
635 z->region, sizeof(*z->override_tree));
636 if(!z->override_tree) {
637 lock_rw_unlock(&z->lock);
638 log_err("out of memory");
641 addr_tree_init(z->override_tree);
643 /* add new elem to tree */
644 if(z->override_tree) {
645 struct local_zone_override* n;
646 n = (struct local_zone_override*)regional_alloc_zero(
647 z->region, sizeof(*n));
649 lock_rw_unlock(&z->lock);
650 log_err("out of memory");
654 if(!addr_tree_insert(z->override_tree,
655 (struct addr_tree_node*)n, &addr, addrlen, net)) {
656 lock_rw_unlock(&z->lock);
657 log_err("duplicate local-zone-override %s %s",
663 lock_rw_unlock(&z->lock);
667 /** parse local-zone: statements */
669 lz_enter_zones(struct local_zones* zones, struct config_file* cfg)
671 struct config_str2list* p;
672 struct local_zone* z;
673 for(p = cfg->local_zones; p; p = p->next) {
674 if(!(z=lz_enter_zone(zones, p->str, p->str2,
677 lock_rw_unlock(&z->lock);
682 /** lookup a zone in rbtree; exact match only; SLOW due to parse */
684 lz_exists(struct local_zones* zones, const char* name)
688 z.dclass = LDNS_RR_CLASS_IN;
689 if(!parse_dname(name, &z.name, &z.namelen, &z.namelabs)) {
690 log_err("bad name %s", name);
693 lock_rw_rdlock(&zones->lock);
694 if(rbtree_search(&zones->ztree, &z.node)) {
695 lock_rw_unlock(&zones->lock);
699 lock_rw_unlock(&zones->lock);
704 /** lookup a zone in cfg->nodefault list */
706 lz_nodefault(struct config_file* cfg, const char* name)
708 struct config_strlist* p;
709 size_t len = strlen(name);
710 if(len == 0) return 0;
711 if(name[len-1] == '.') len--;
713 for(p = cfg->local_zones_nodefault; p; p = p->next) {
714 /* compare zone name, lowercase, compare without ending . */
715 if(strncasecmp(p->str, name, len) == 0 &&
716 (strlen(p->str) == len || (strlen(p->str)==len+1 &&
717 p->str[len] == '.')))
723 /** enter (AS112) empty default zone */
725 add_empty_default(struct local_zones* zones, struct config_file* cfg,
728 struct local_zone* z;
729 char str[1024]; /* known long enough */
730 if(lz_exists(zones, name) || lz_nodefault(cfg, name))
731 return 1; /* do not enter default content */
732 if(!(z=lz_enter_zone(zones, name, "static", LDNS_RR_CLASS_IN)))
734 snprintf(str, sizeof(str), "%s 10800 IN SOA localhost. "
735 "nobody.invalid. 1 3600 1200 604800 10800", name);
736 if(!lz_enter_rr_into_zone(z, str)) {
737 lock_rw_unlock(&z->lock);
740 snprintf(str, sizeof(str), "%s 10800 IN NS localhost. ", name);
741 if(!lz_enter_rr_into_zone(z, str)) {
742 lock_rw_unlock(&z->lock);
745 lock_rw_unlock(&z->lock);
749 /** enter default zones */
750 int local_zone_enter_defaults(struct local_zones* zones, struct config_file* cfg)
752 struct local_zone* z;
755 /* Do not add any default */
756 if(cfg->local_zones_disable_default)
759 /* this list of zones is from RFC 6303 and RFC 7686 */
761 /* block localhost level zones first, then onion and later the LAN zones */
763 /* localhost. zone */
764 if(!lz_exists(zones, "localhost.") &&
765 !lz_nodefault(cfg, "localhost.")) {
766 if(!(z=lz_enter_zone(zones, "localhost.", "redirect",
767 LDNS_RR_CLASS_IN)) ||
768 !lz_enter_rr_into_zone(z,
769 "localhost. 10800 IN NS localhost.") ||
770 !lz_enter_rr_into_zone(z,
771 "localhost. 10800 IN SOA localhost. nobody.invalid. "
772 "1 3600 1200 604800 10800") ||
773 !lz_enter_rr_into_zone(z,
774 "localhost. 10800 IN A 127.0.0.1") ||
775 !lz_enter_rr_into_zone(z,
776 "localhost. 10800 IN AAAA ::1")) {
777 log_err("out of memory adding default zone");
778 if(z) { lock_rw_unlock(&z->lock); }
781 lock_rw_unlock(&z->lock);
783 /* reverse ip4 zone */
784 if(!lz_exists(zones, "127.in-addr.arpa.") &&
785 !lz_nodefault(cfg, "127.in-addr.arpa.")) {
786 if(!(z=lz_enter_zone(zones, "127.in-addr.arpa.", "static",
787 LDNS_RR_CLASS_IN)) ||
788 !lz_enter_rr_into_zone(z,
789 "127.in-addr.arpa. 10800 IN NS localhost.") ||
790 !lz_enter_rr_into_zone(z,
791 "127.in-addr.arpa. 10800 IN SOA localhost. "
792 "nobody.invalid. 1 3600 1200 604800 10800") ||
793 !lz_enter_rr_into_zone(z,
794 "1.0.0.127.in-addr.arpa. 10800 IN PTR localhost.")) {
795 log_err("out of memory adding default zone");
796 if(z) { lock_rw_unlock(&z->lock); }
799 lock_rw_unlock(&z->lock);
801 /* reverse ip6 zone */
802 if(!lz_exists(zones, "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa.") &&
803 !lz_nodefault(cfg, "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa.")) {
804 if(!(z=lz_enter_zone(zones, "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa.", "static",
805 LDNS_RR_CLASS_IN)) ||
806 !lz_enter_rr_into_zone(z,
807 "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa. 10800 IN NS localhost.") ||
808 !lz_enter_rr_into_zone(z,
809 "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa. 10800 IN SOA localhost. "
810 "nobody.invalid. 1 3600 1200 604800 10800") ||
811 !lz_enter_rr_into_zone(z,
812 "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa. 10800 IN PTR localhost.")) {
813 log_err("out of memory adding default zone");
814 if(z) { lock_rw_unlock(&z->lock); }
817 lock_rw_unlock(&z->lock);
819 /* onion. zone (RFC 7686) */
820 if(!add_empty_default(zones, cfg, "onion.")) {
821 log_err("out of memory adding default zone");
824 /* test. zone (RFC 7686) */
825 if(!add_empty_default(zones, cfg, "test.")) {
826 log_err("out of memory adding default zone");
829 /* invalid. zone (RFC 7686) */
830 if(!add_empty_default(zones, cfg, "invalid.")) {
831 log_err("out of memory adding default zone");
834 /* block AS112 zones, unless asked not to */
835 if(!cfg->unblock_lan_zones) {
836 for(zstr = as112_zones; *zstr; zstr++) {
837 if(!add_empty_default(zones, cfg, *zstr)) {
838 log_err("out of memory adding default zone");
846 /** parse local-zone-override: statements */
848 lz_enter_overrides(struct local_zones* zones, struct config_file* cfg)
850 struct config_str3list* p;
851 for(p = cfg->local_zone_overrides; p; p = p->next) {
852 if(!lz_enter_override(zones, p->str, p->str2, p->str3,
859 /** setup parent pointers, so that a lookup can be done for closest match */
861 init_parents(struct local_zones* zones)
863 struct local_zone* node, *prev = NULL, *p;
865 lock_rw_wrlock(&zones->lock);
866 RBTREE_FOR(node, struct local_zone*, &zones->ztree) {
867 lock_rw_wrlock(&node->lock);
869 if(!prev || prev->dclass != node->dclass) {
871 lock_rw_unlock(&node->lock);
874 (void)dname_lab_cmp(prev->name, prev->namelabs, node->name,
875 node->namelabs, &m); /* we know prev is smaller */
876 /* sort order like: . com. bla.com. zwb.com. net. */
877 /* find the previous, or parent-parent-parent */
878 for(p = prev; p; p = p->parent)
879 /* looking for name with few labels, a parent */
880 if(p->namelabs <= m) {
881 /* ==: since prev matched m, this is closest*/
882 /* <: prev matches more, but is not a parent,
883 * this one is a (grand)parent */
889 if(node->override_tree)
890 addr_tree_init_parents(node->override_tree);
891 lock_rw_unlock(&node->lock);
893 lock_rw_unlock(&zones->lock);
896 /** enter implicit transparent zone for local-data: without local-zone: */
898 lz_setup_implicit(struct local_zones* zones, struct config_file* cfg)
900 /* walk over all items that have no parent zone and find
901 * the name that covers them all (could be the root) and
902 * add that as a transparent zone */
903 struct config_strlist* p;
905 int have_other_classes = 0;
910 int match = 0; /* number of labels match count */
912 init_parents(zones); /* to enable local_zones_lookup() */
913 for(p = cfg->local_data; p; p = p->next) {
915 uint16_t rr_class, rr_type;
918 if(!get_rr_nameclass(p->str, &rr_name, &rr_class, &rr_type)) {
919 log_err("Bad local-data RR %s", p->str);
922 labs = dname_count_size_labels(rr_name, &len);
923 lock_rw_rdlock(&zones->lock);
924 if(!local_zones_lookup(zones, rr_name, len, labs, rr_class,
935 if(rr_class != dclass) {
936 /* process other classes later */
938 have_other_classes = 1;
939 lock_rw_unlock(&zones->lock);
942 /* find smallest shared topdomain */
943 (void)dname_lab_cmp(nm, nmlabs,
949 } else free(rr_name);
950 lock_rw_unlock(&zones->lock);
954 struct local_zone* z;
955 /* allocate zone of smallest shared topdomain to contain em */
957 dname_remove_labels(&n2, &nmlen, nmlabs - match);
958 n2 = memdup(n2, nmlen);
961 log_err("out of memory");
964 log_nametypeclass(VERB_ALGO, "implicit transparent local-zone",
966 if(!(z=lz_enter_zone_dname(zones, n2, nmlen, match,
967 local_zone_transparent, dclass))) {
970 lock_rw_unlock(&z->lock);
972 if(have_other_classes) {
973 /* restart to setup other class */
974 return lz_setup_implicit(zones, cfg);
979 /** enter local-zone-tag info */
981 lz_enter_zone_tags(struct local_zones* zones, struct config_file* cfg)
983 struct config_strbytelist* p;
985 for(p = cfg->local_zone_tags; p; p = p->next) {
986 if(!lz_enter_zone_tag(zones, p->str, p->str2, p->str2len,
991 if(c) verbose(VERB_ALGO, "applied tags to %d local zones", c);
995 /** enter auth data */
997 lz_enter_data(struct local_zones* zones, struct config_file* cfg)
999 struct config_strlist* p;
1000 for(p = cfg->local_data; p; p = p->next) {
1001 if(!lz_enter_rr_str(zones, p->str))
1007 /** free memory from config */
1009 lz_freeup_cfg(struct config_file* cfg)
1011 config_deldblstrlist(cfg->local_zones);
1012 cfg->local_zones = NULL;
1013 config_delstrlist(cfg->local_zones_nodefault);
1014 cfg->local_zones_nodefault = NULL;
1015 config_delstrlist(cfg->local_data);
1016 cfg->local_data = NULL;
1020 local_zones_apply_cfg(struct local_zones* zones, struct config_file* cfg)
1022 /* create zones from zone statements. */
1023 if(!lz_enter_zones(zones, cfg)) {
1026 /* apply default zones+content (unless disabled, or overridden) */
1027 if(!local_zone_enter_defaults(zones, cfg)) {
1030 /* enter local zone overrides */
1031 if(!lz_enter_overrides(zones, cfg)) {
1034 /* create implicit transparent zone from data. */
1035 if(!lz_setup_implicit(zones, cfg)) {
1039 /* setup parent ptrs for lookup during data entry */
1040 init_parents(zones);
1041 /* insert local zone tags */
1042 if(!lz_enter_zone_tags(zones, cfg)) {
1045 /* insert local data */
1046 if(!lz_enter_data(zones, cfg)) {
1049 /* freeup memory from cfg struct. */
1055 local_zones_lookup(struct local_zones* zones,
1056 uint8_t* name, size_t len, int labs, uint16_t dclass, uint16_t dtype)
1058 return local_zones_tags_lookup(zones, name, len, labs,
1059 dclass, dtype, NULL, 0, 1);
1063 local_zones_tags_lookup(struct local_zones* zones,
1064 uint8_t* name, size_t len, int labs, uint16_t dclass, uint16_t dtype,
1065 uint8_t* taglist, size_t taglen, int ignoretags)
1067 rbnode_type* res = NULL;
1068 struct local_zone *result;
1069 struct local_zone key;
1071 /* for type DS use a zone higher when on a zonecut */
1072 if(dtype == LDNS_RR_TYPE_DS && !dname_is_root(name)) {
1073 dname_remove_label(&name, &len);
1076 key.node.key = &key;
1077 key.dclass = dclass;
1080 key.namelabs = labs;
1081 rbtree_find_less_equal(&zones->ztree, &key, &res);
1082 result = (struct local_zone*)res;
1083 /* exact or smaller element (or no element) */
1084 if(!result || result->dclass != dclass)
1086 /* count number of labels matched */
1087 (void)dname_lab_cmp(result->name, result->namelabs, key.name,
1089 while(result) { /* go up until qname is zone or subdomain of zone */
1090 if(result->namelabs <= m)
1091 if(ignoretags || !result->taglist ||
1092 taglist_intersect(result->taglist,
1093 result->taglen, taglist, taglen))
1095 result = result->parent;
1101 local_zones_find(struct local_zones* zones,
1102 uint8_t* name, size_t len, int labs, uint16_t dclass)
1104 struct local_zone key;
1105 key.node.key = &key;
1106 key.dclass = dclass;
1109 key.namelabs = labs;
1111 return (struct local_zone*)rbtree_search(&zones->ztree, &key);
1114 /** print all RRsets in local zone */
1116 local_zone_out(struct local_zone* z)
1118 struct local_data* d;
1119 struct local_rrset* p;
1120 RBTREE_FOR(d, struct local_data*, &z->data) {
1121 for(p = d->rrsets; p; p = p->next) {
1122 log_nametypeclass(0, "rrset", d->name,
1123 ntohs(p->rrset->rk.type),
1124 ntohs(p->rrset->rk.rrset_class));
1129 void local_zones_print(struct local_zones* zones)
1131 struct local_zone* z;
1132 lock_rw_rdlock(&zones->lock);
1133 log_info("number of auth zones %u", (unsigned)zones->ztree.count);
1134 RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
1136 lock_rw_rdlock(&z->lock);
1137 snprintf(buf, sizeof(buf), "%s zone",
1138 local_zone_type2str(z->type));
1139 log_nametypeclass(0, buf, z->name, 0, z->dclass);
1141 lock_rw_unlock(&z->lock);
1143 lock_rw_unlock(&zones->lock);
1146 /** encode answer consisting of 1 rrset */
1148 local_encode(struct query_info* qinfo, struct module_env* env,
1149 struct edns_data* edns, struct comm_reply* repinfo, sldns_buffer* buf,
1150 struct regional* temp, struct ub_packed_rrset_key* rrset, int ansec,
1153 struct reply_info rep;
1155 /* make answer with time=0 for fixed TTL values */
1156 memset(&rep, 0, sizeof(rep));
1157 rep.flags = (uint16_t)((BIT_QR | BIT_AA | BIT_RA) | rcode);
1160 rep.an_numrrsets = 1;
1161 else rep.ns_numrrsets = 1;
1162 rep.rrset_count = 1;
1163 rep.rrsets = &rrset;
1164 udpsize = edns->udp_size;
1165 edns->edns_version = EDNS_ADVERTISED_VERSION;
1166 edns->udp_size = EDNS_ADVERTISED_SIZE;
1167 edns->ext_rcode = 0;
1168 edns->bits &= EDNS_DO;
1169 if(!inplace_cb_reply_local_call(env, qinfo, NULL, &rep, rcode, edns,
1170 repinfo, temp) || !reply_info_answer_encode(qinfo, &rep,
1171 *(uint16_t*)sldns_buffer_begin(buf), sldns_buffer_read_u16_at(buf, 2),
1172 buf, 0, 0, temp, udpsize, edns, (int)(edns->bits&EDNS_DO), 0)) {
1173 error_encode(buf, (LDNS_RCODE_SERVFAIL|BIT_AA), qinfo,
1174 *(uint16_t*)sldns_buffer_begin(buf),
1175 sldns_buffer_read_u16_at(buf, 2), edns);
1180 /** encode local error answer */
1182 local_error_encode(struct query_info* qinfo, struct module_env* env,
1183 struct edns_data* edns, struct comm_reply* repinfo, sldns_buffer* buf,
1184 struct regional* temp, int rcode, int r)
1186 edns->edns_version = EDNS_ADVERTISED_VERSION;
1187 edns->udp_size = EDNS_ADVERTISED_SIZE;
1188 edns->ext_rcode = 0;
1189 edns->bits &= EDNS_DO;
1191 if(!inplace_cb_reply_local_call(env, qinfo, NULL, NULL,
1192 rcode, edns, repinfo, temp))
1193 edns->opt_list = NULL;
1194 error_encode(buf, r, qinfo, *(uint16_t*)sldns_buffer_begin(buf),
1195 sldns_buffer_read_u16_at(buf, 2), edns);
1198 /** find local data tag string match for the given type in the list */
1200 local_data_find_tag_datas(const struct query_info* qinfo,
1201 struct config_strlist* list, struct ub_packed_rrset_key* r,
1202 struct regional* temp)
1204 struct config_strlist* p;
1206 uint8_t rr[LDNS_RR_BUF_SIZE];
1209 struct packed_rrset_data* d;
1210 for(p=list; p; p=p->next) {
1214 /* does this element match the type? */
1215 snprintf(buf, sizeof(buf), ". %s", p->str);
1216 res = sldns_str2wire_rr_buf(buf, rr, &len, NULL, 3600,
1219 /* parse errors are already checked before, in
1220 * acllist check_data, skip this for robustness */
1222 if(len < 1 /* . */ + 8 /* typeclassttl*/ + 2 /*rdatalen*/)
1224 rdr_type = sldns_wirerr_get_type(rr, len, 1);
1225 if(rdr_type != qinfo->qtype && rdr_type != LDNS_RR_TYPE_CNAME)
1228 /* do we have entries already? if not setup key */
1229 if(r->rk.dname == NULL) {
1231 r->rk.dname = qinfo->qname;
1232 r->rk.dname_len = qinfo->qname_len;
1233 r->rk.type = htons(rdr_type);
1234 r->rk.rrset_class = htons(qinfo->qclass);
1236 d = (struct packed_rrset_data*)regional_alloc_zero(
1237 temp, sizeof(struct packed_rrset_data)
1238 + sizeof(size_t) + sizeof(uint8_t*) +
1240 if(!d) return 0; /* out of memory */
1242 d->ttl = sldns_wirerr_get_ttl(rr, len, 1);
1243 d->rr_len = (size_t*)((uint8_t*)d +
1244 sizeof(struct packed_rrset_data));
1245 d->rr_data = (uint8_t**)&(d->rr_len[1]);
1246 d->rr_ttl = (time_t*)&(d->rr_data[1]);
1248 d = (struct packed_rrset_data*)r->entry.data;
1249 /* add entry to the data */
1251 size_t* oldlen = d->rr_len;
1252 uint8_t** olddata = d->rr_data;
1253 time_t* oldttl = d->rr_ttl;
1254 /* increase arrays for lookup */
1255 /* this is of course slow for very many records,
1256 * but most redirects are expected with few records */
1257 d->rr_len = (size_t*)regional_alloc_zero(temp,
1258 (d->count+1)*sizeof(size_t));
1259 d->rr_data = (uint8_t**)regional_alloc_zero(temp,
1260 (d->count+1)*sizeof(uint8_t*));
1261 d->rr_ttl = (time_t*)regional_alloc_zero(temp,
1262 (d->count+1)*sizeof(time_t));
1263 if(!d->rr_len || !d->rr_data || !d->rr_ttl)
1264 return 0; /* out of memory */
1265 /* first one was allocated after struct d, but new
1266 * ones get their own array increment alloc, so
1267 * copy old content */
1268 memmove(d->rr_len, oldlen, d->count*sizeof(size_t));
1269 memmove(d->rr_data, olddata, d->count*sizeof(uint8_t*));
1270 memmove(d->rr_ttl, oldttl, d->count*sizeof(time_t));
1273 d->rr_len[d->count] = sldns_wirerr_get_rdatalen(rr, len, 1)+2;
1274 d->rr_ttl[d->count] = sldns_wirerr_get_ttl(rr, len, 1);
1275 d->rr_data[d->count] = regional_alloc_init(temp,
1276 sldns_wirerr_get_rdatawl(rr, len, 1),
1277 d->rr_len[d->count]);
1278 if(!d->rr_data[d->count])
1279 return 0; /* out of memory */
1288 find_tag_datas(struct query_info* qinfo, struct config_strlist* list,
1289 struct ub_packed_rrset_key* r, struct regional* temp)
1291 int result = local_data_find_tag_datas(qinfo, list, r, temp);
1293 /* If we've found a non-exact alias type of local data, make a shallow
1294 * copy of the RRset and remember it in qinfo to complete the alias
1296 if(result && qinfo->qtype != LDNS_RR_TYPE_CNAME &&
1297 r->rk.type == htons(LDNS_RR_TYPE_CNAME)) {
1298 qinfo->local_alias =
1299 regional_alloc_zero(temp, sizeof(struct local_rrset));
1300 if(!qinfo->local_alias)
1301 return 0; /* out of memory */
1302 qinfo->local_alias->rrset =
1303 regional_alloc_init(temp, r, sizeof(*r));
1304 if(!qinfo->local_alias->rrset)
1305 return 0; /* out of memory */
1310 /** answer local data match */
1312 local_data_answer(struct local_zone* z, struct module_env* env,
1313 struct query_info* qinfo, struct edns_data* edns,
1314 struct comm_reply* repinfo, sldns_buffer* buf,
1315 struct regional* temp, int labs, struct local_data** ldp,
1316 enum localzone_type lz_type, int tag, struct config_strlist** tag_datas,
1317 size_t tag_datas_size, char** tagname, int num_tags)
1319 struct local_data key;
1320 struct local_data* ld;
1321 struct local_rrset* lr;
1322 key.node.key = &key;
1323 key.name = qinfo->qname;
1324 key.namelen = qinfo->qname_len;
1325 key.namelabs = labs;
1326 if(lz_type == local_zone_redirect) {
1328 key.namelen = z->namelen;
1329 key.namelabs = z->namelabs;
1330 if(tag != -1 && (size_t)tag<tag_datas_size && tag_datas[tag]) {
1331 struct ub_packed_rrset_key r;
1332 memset(&r, 0, sizeof(r));
1333 if(find_tag_datas(qinfo, tag_datas[tag], &r, temp)) {
1334 verbose(VERB_ALGO, "redirect with tag data [%d] %s",
1335 tag, (tag<num_tags?tagname[tag]:"null"));
1337 /* If we found a matching alias, we should
1338 * use it as part of the answer, but we can't
1339 * encode it until we complete the alias
1341 if(qinfo->local_alias)
1343 return local_encode(qinfo, env, edns, repinfo, buf, temp,
1344 &r, 1, LDNS_RCODE_NOERROR);
1348 ld = (struct local_data*)rbtree_search(&z->data, &key.node);
1353 lr = local_data_find_type(ld, qinfo->qtype, 1);
1357 /* Special case for alias matching. See local_data_answer(). */
1358 if(lz_type == local_zone_redirect &&
1359 qinfo->qtype != LDNS_RR_TYPE_CNAME &&
1360 lr->rrset->rk.type == htons(LDNS_RR_TYPE_CNAME)) {
1361 qinfo->local_alias =
1362 regional_alloc_zero(temp, sizeof(struct local_rrset));
1363 if(!qinfo->local_alias)
1364 return 0; /* out of memory */
1365 qinfo->local_alias->rrset =
1366 regional_alloc_init(temp, lr->rrset, sizeof(*lr->rrset));
1367 if(!qinfo->local_alias->rrset)
1368 return 0; /* out of memory */
1369 qinfo->local_alias->rrset->rk.dname = qinfo->qname;
1370 qinfo->local_alias->rrset->rk.dname_len = qinfo->qname_len;
1373 if(lz_type == local_zone_redirect) {
1374 /* convert rrset name to query name; like a wildcard */
1375 struct ub_packed_rrset_key r = *lr->rrset;
1376 r.rk.dname = qinfo->qname;
1377 r.rk.dname_len = qinfo->qname_len;
1378 return local_encode(qinfo, env, edns, repinfo, buf, temp, &r, 1,
1379 LDNS_RCODE_NOERROR);
1381 return local_encode(qinfo, env, edns, repinfo, buf, temp, lr->rrset, 1,
1382 LDNS_RCODE_NOERROR);
1386 * See if the local zone does not cover the name, eg. the name is not
1387 * in the zone and the zone is transparent */
1389 local_zone_does_not_cover(struct local_zone* z, struct query_info* qinfo,
1392 struct local_data key;
1393 struct local_data* ld = NULL;
1394 struct local_rrset* lr = NULL;
1395 if(z->type == local_zone_always_transparent)
1397 if(z->type != local_zone_transparent
1398 && z->type != local_zone_typetransparent
1399 && z->type != local_zone_inform)
1401 key.node.key = &key;
1402 key.name = qinfo->qname;
1403 key.namelen = qinfo->qname_len;
1404 key.namelabs = labs;
1405 ld = (struct local_data*)rbtree_search(&z->data, &key.node);
1406 if(z->type == local_zone_transparent || z->type == local_zone_inform)
1407 return (ld == NULL);
1409 lr = local_data_find_type(ld, qinfo->qtype, 1);
1410 /* local_zone_typetransparent */
1411 return (lr == NULL);
1415 * Answer in case where no exact match is found.
1416 * @param z: zone for query.
1417 * @param env: module environment.
1418 * @param qinfo: query.
1419 * @param edns: edns from query.
1420 * @param repinfo: source address for checks. may be NULL.
1421 * @param buf: buffer for answer.
1422 * @param temp: temp region for encoding.
1423 * @param ld: local data, if NULL, no such name exists in localdata.
1424 * @param lz_type: type of the local zone.
1425 * @return 1 if a reply is to be sent, 0 if not.
1428 lz_zone_answer(struct local_zone* z, struct module_env* env,
1429 struct query_info* qinfo, struct edns_data* edns,
1430 struct comm_reply* repinfo, sldns_buffer* buf, struct regional* temp,
1431 struct local_data* ld, enum localzone_type lz_type)
1433 if(lz_type == local_zone_deny || lz_type == local_zone_inform_deny) {
1434 /** no reply at all, signal caller by clearing buffer. */
1435 sldns_buffer_clear(buf);
1436 sldns_buffer_flip(buf);
1438 } else if(lz_type == local_zone_refuse
1439 || lz_type == local_zone_always_refuse) {
1440 local_error_encode(qinfo, env, edns, repinfo, buf, temp,
1441 LDNS_RCODE_REFUSED, (LDNS_RCODE_REFUSED|BIT_AA));
1443 } else if(lz_type == local_zone_static ||
1444 lz_type == local_zone_redirect ||
1445 lz_type == local_zone_always_nxdomain) {
1446 /* for static, reply nodata or nxdomain
1447 * for redirect, reply nodata */
1448 /* no additional section processing,
1449 * cname, dname or wildcard processing,
1450 * or using closest match for NSEC.
1451 * or using closest match for returning delegation downwards
1453 int rcode = (ld || lz_type == local_zone_redirect)?
1454 LDNS_RCODE_NOERROR:LDNS_RCODE_NXDOMAIN;
1456 return local_encode(qinfo, env, edns, repinfo, buf, temp,
1458 local_error_encode(qinfo, env, edns, repinfo, buf, temp, rcode,
1461 } else if(lz_type == local_zone_typetransparent
1462 || lz_type == local_zone_always_transparent) {
1463 /* no NODATA or NXDOMAINS for this zone type */
1466 /* else lz_type == local_zone_transparent */
1468 /* if the zone is transparent and the name exists, but the type
1469 * does not, then we should make this noerror/nodata */
1470 if(ld && ld->rrsets) {
1471 int rcode = LDNS_RCODE_NOERROR;
1473 return local_encode(qinfo, env, edns, repinfo, buf, temp,
1475 local_error_encode(qinfo, env, edns, repinfo, buf, temp, rcode,
1480 /* stop here, and resolve further on */
1484 /** print log information for an inform zone query */
1486 lz_inform_print(struct local_zone* z, struct query_info* qinfo,
1487 struct comm_reply* repinfo)
1489 char ip[128], txt[512];
1490 char zname[LDNS_MAX_DOMAINLEN+1];
1491 uint16_t port = ntohs(((struct sockaddr_in*)&repinfo->addr)->sin_port);
1492 dname_str(z->name, zname);
1493 addr_to_str(&repinfo->addr, repinfo->addrlen, ip, sizeof(ip));
1494 snprintf(txt, sizeof(txt), "%s %s %s@%u", zname, local_zone_type2str(z->type), ip,
1496 log_nametypeclass(0, txt, qinfo->qname, qinfo->qtype, qinfo->qclass);
1499 static enum localzone_type
1500 lz_type(uint8_t *taglist, size_t taglen, uint8_t *taglist2, size_t taglen2,
1501 uint8_t *tagactions, size_t tagactionssize, enum localzone_type lzt,
1502 struct comm_reply* repinfo, struct rbtree_type* override_tree,
1503 int* tag, char** tagname, int num_tags)
1505 struct local_zone_override* lzo;
1506 if(repinfo && override_tree) {
1507 lzo = (struct local_zone_override*)addr_tree_lookup(
1508 override_tree, &repinfo->addr, repinfo->addrlen);
1509 if(lzo && lzo->type) {
1510 verbose(VERB_ALGO, "local zone override to type %s",
1511 local_zone_type2str(lzo->type));
1515 if(!taglist || !taglist2)
1517 return local_data_find_tag_action(taglist, taglen, taglist2, taglen2,
1518 tagactions, tagactionssize, lzt, tag, tagname, num_tags);
1522 local_data_find_tag_action(const uint8_t* taglist, size_t taglen,
1523 const uint8_t* taglist2, size_t taglen2, const uint8_t* tagactions,
1524 size_t tagactionssize, enum localzone_type lzt, int* tag,
1525 char* const* tagname, int num_tags)
1530 for(i=0; i<taglen && i<taglen2; i++) {
1531 tagmatch = (taglist[i] & taglist2[i]);
1532 for(j=0; j<8 && tagmatch>0; j++) {
1533 if((tagmatch & 0x1)) {
1534 *tag = (int)(i*8+j);
1535 verbose(VERB_ALGO, "matched tag [%d] %s",
1536 *tag, (*tag<num_tags?tagname[*tag]:"null"));
1537 /* does this tag have a tag action? */
1538 if(i*8+j < tagactionssize && tagactions
1539 && tagactions[i*8+j] != 0) {
1540 verbose(VERB_ALGO, "tag action [%d] %s to type %s",
1541 *tag, (*tag<num_tags?tagname[*tag]:"null"),
1542 local_zone_type2str(
1543 (enum localzone_type)
1544 tagactions[i*8+j]));
1545 return (enum localzone_type)tagactions[i*8+j];
1556 local_zones_answer(struct local_zones* zones, struct module_env* env,
1557 struct query_info* qinfo, struct edns_data* edns, sldns_buffer* buf,
1558 struct regional* temp, struct comm_reply* repinfo, uint8_t* taglist,
1559 size_t taglen, uint8_t* tagactions, size_t tagactionssize,
1560 struct config_strlist** tag_datas, size_t tag_datas_size,
1561 char** tagname, int num_tags, struct view* view)
1563 /* see if query is covered by a zone,
1564 * if so: - try to match (exact) local data
1565 * - look at zone type for negative response. */
1566 int labs = dname_count_labels(qinfo->qname);
1567 struct local_data* ld = NULL;
1568 struct local_zone* z = NULL;
1569 enum localzone_type lzt = local_zone_transparent;
1573 lock_rw_rdlock(&view->lock);
1574 if(view->local_zones &&
1575 (z = local_zones_lookup(view->local_zones,
1576 qinfo->qname, qinfo->qname_len, labs,
1577 qinfo->qclass, qinfo->qtype))) {
1578 lock_rw_rdlock(&z->lock);
1581 if(lzt == local_zone_noview) {
1582 lock_rw_unlock(&z->lock);
1585 if(z && (lzt == local_zone_transparent ||
1586 lzt == local_zone_typetransparent ||
1587 lzt == local_zone_inform ||
1588 lzt == local_zone_always_transparent) &&
1589 local_zone_does_not_cover(z, qinfo, labs)) {
1590 lock_rw_unlock(&z->lock);
1593 if(view->local_zones && !z && !view->isfirst){
1594 lock_rw_unlock(&view->lock);
1597 if(z && verbosity >= VERB_ALGO) {
1599 dname_str(z->name, zname);
1600 verbose(VERB_ALGO, "using localzone %s %s from view %s",
1601 zname, local_zone_type2str(lzt), view->name);
1603 lock_rw_unlock(&view->lock);
1606 /* try global local_zones tree */
1607 lock_rw_rdlock(&zones->lock);
1608 if(!(z = local_zones_tags_lookup(zones, qinfo->qname,
1609 qinfo->qname_len, labs, qinfo->qclass, qinfo->qtype,
1610 taglist, taglen, 0))) {
1611 lock_rw_unlock(&zones->lock);
1614 lock_rw_rdlock(&z->lock);
1615 lzt = lz_type(taglist, taglen, z->taglist, z->taglen,
1616 tagactions, tagactionssize, z->type, repinfo,
1617 z->override_tree, &tag, tagname, num_tags);
1618 lock_rw_unlock(&zones->lock);
1619 if(z && verbosity >= VERB_ALGO) {
1621 dname_str(z->name, zname);
1622 verbose(VERB_ALGO, "using localzone %s %s", zname,
1623 local_zone_type2str(lzt));
1626 if((env->cfg->log_local_actions ||
1627 lzt == local_zone_inform || lzt == local_zone_inform_deny)
1629 lz_inform_print(z, qinfo, repinfo);
1631 if(lzt != local_zone_always_refuse
1632 && lzt != local_zone_always_transparent
1633 && lzt != local_zone_always_nxdomain
1634 && local_data_answer(z, env, qinfo, edns, repinfo, buf, temp, labs,
1635 &ld, lzt, tag, tag_datas, tag_datas_size, tagname, num_tags)) {
1636 lock_rw_unlock(&z->lock);
1637 /* We should tell the caller that encode is deferred if we found
1639 return !qinfo->local_alias;
1641 r = lz_zone_answer(z, env, qinfo, edns, repinfo, buf, temp, ld, lzt);
1642 lock_rw_unlock(&z->lock);
1643 return r && !qinfo->local_alias; /* see above */
1646 const char* local_zone_type2str(enum localzone_type t)
1649 case local_zone_unset: return "unset";
1650 case local_zone_deny: return "deny";
1651 case local_zone_refuse: return "refuse";
1652 case local_zone_redirect: return "redirect";
1653 case local_zone_transparent: return "transparent";
1654 case local_zone_typetransparent: return "typetransparent";
1655 case local_zone_static: return "static";
1656 case local_zone_nodefault: return "nodefault";
1657 case local_zone_inform: return "inform";
1658 case local_zone_inform_deny: return "inform_deny";
1659 case local_zone_always_transparent: return "always_transparent";
1660 case local_zone_always_refuse: return "always_refuse";
1661 case local_zone_always_nxdomain: return "always_nxdomain";
1662 case local_zone_noview: return "noview";
1667 int local_zone_str2type(const char* type, enum localzone_type* t)
1669 if(strcmp(type, "deny") == 0)
1670 *t = local_zone_deny;
1671 else if(strcmp(type, "refuse") == 0)
1672 *t = local_zone_refuse;
1673 else if(strcmp(type, "static") == 0)
1674 *t = local_zone_static;
1675 else if(strcmp(type, "transparent") == 0)
1676 *t = local_zone_transparent;
1677 else if(strcmp(type, "typetransparent") == 0)
1678 *t = local_zone_typetransparent;
1679 else if(strcmp(type, "redirect") == 0)
1680 *t = local_zone_redirect;
1681 else if(strcmp(type, "inform") == 0)
1682 *t = local_zone_inform;
1683 else if(strcmp(type, "inform_deny") == 0)
1684 *t = local_zone_inform_deny;
1685 else if(strcmp(type, "always_transparent") == 0)
1686 *t = local_zone_always_transparent;
1687 else if(strcmp(type, "always_refuse") == 0)
1688 *t = local_zone_always_refuse;
1689 else if(strcmp(type, "always_nxdomain") == 0)
1690 *t = local_zone_always_nxdomain;
1691 else if(strcmp(type, "noview") == 0)
1692 *t = local_zone_noview;
1693 else if(strcmp(type, "nodefault") == 0)
1694 *t = local_zone_nodefault;
1699 /** iterate over the kiddies of the given name and set their parent ptr */
1701 set_kiddo_parents(struct local_zone* z, struct local_zone* match,
1702 struct local_zone* newp)
1704 /* both zones and z are locked already */
1705 /* in the sorted rbtree, the kiddies of z are located after z */
1706 /* z must be present in the tree */
1707 struct local_zone* p = z;
1708 p = (struct local_zone*)rbtree_next(&p->node);
1709 while(p!=(struct local_zone*)RBTREE_NULL &&
1710 p->dclass == z->dclass && dname_strict_subdomain(p->name,
1711 p->namelabs, z->name, z->namelabs)) {
1712 /* update parent ptr */
1713 /* only when matches with existing parent pointer, so that
1714 * deeper child structures are not touched, i.e.
1715 * update of x, and a.x, b.x, f.b.x, g.b.x, c.x, y
1716 * gets to update a.x, b.x and c.x */
1717 lock_rw_wrlock(&p->lock);
1718 if(p->parent == match)
1720 lock_rw_unlock(&p->lock);
1721 p = (struct local_zone*)rbtree_next(&p->node);
1725 struct local_zone* local_zones_add_zone(struct local_zones* zones,
1726 uint8_t* name, size_t len, int labs, uint16_t dclass,
1727 enum localzone_type tp)
1730 struct local_zone* z = local_zone_create(name, len, labs, tp, dclass);
1735 lock_rw_wrlock(&z->lock);
1737 /* find the closest parent */
1738 z->parent = local_zones_find(zones, name, len, labs, dclass);
1740 /* insert into the tree */
1741 if(!rbtree_insert(&zones->ztree, &z->node)) {
1742 /* duplicate entry! */
1743 lock_rw_unlock(&z->lock);
1744 local_zone_delete(z);
1745 log_err("internal: duplicate entry in local_zones_add_zone");
1749 /* set parent pointers right */
1750 set_kiddo_parents(z, z->parent, z);
1752 lock_rw_unlock(&z->lock);
1756 void local_zones_del_zone(struct local_zones* zones, struct local_zone* z)
1758 /* fix up parents in tree */
1759 lock_rw_wrlock(&z->lock);
1760 set_kiddo_parents(z, z, z->parent);
1762 /* remove from tree */
1763 (void)rbtree_delete(&zones->ztree, z);
1765 /* delete the zone */
1766 lock_rw_unlock(&z->lock);
1767 local_zone_delete(z);
1771 local_zones_add_RR(struct local_zones* zones, const char* rr)
1774 uint16_t rr_class, rr_type;
1777 struct local_zone* z;
1779 if(!get_rr_nameclass(rr, &rr_name, &rr_class, &rr_type)) {
1782 labs = dname_count_size_labels(rr_name, &len);
1783 /* could first try readlock then get writelock if zone does not exist,
1784 * but we do not add enough RRs (from multiple threads) to optimize */
1785 lock_rw_wrlock(&zones->lock);
1786 z = local_zones_lookup(zones, rr_name, len, labs, rr_class, rr_type);
1788 z = local_zones_add_zone(zones, rr_name, len, labs, rr_class,
1789 local_zone_transparent);
1791 lock_rw_unlock(&zones->lock);
1797 lock_rw_wrlock(&z->lock);
1798 lock_rw_unlock(&zones->lock);
1799 r = lz_enter_rr_into_zone(z, rr);
1800 lock_rw_unlock(&z->lock);
1804 /** returns true if the node is terminal so no deeper domain names exist */
1806 is_terminal(struct local_data* d)
1808 /* for empty nonterminals, the deeper domain names are sorted
1809 * right after them, so simply check the next name in the tree
1811 struct local_data* n = (struct local_data*)rbtree_next(&d->node);
1812 if(n == (struct local_data*)RBTREE_NULL)
1813 return 1; /* last in tree, no deeper node */
1814 if(dname_strict_subdomain(n->name, n->namelabs, d->name, d->namelabs))
1815 return 0; /* there is a deeper node */
1819 /** delete empty terminals from tree when final data is deleted */
1821 del_empty_term(struct local_zone* z, struct local_data* d,
1822 uint8_t* name, size_t len, int labs)
1824 while(d && d->rrsets == NULL && is_terminal(d)) {
1825 /* is this empty nonterminal? delete */
1826 /* note, no memory recycling in zone region */
1827 (void)rbtree_delete(&z->data, d);
1829 /* go up and to the next label */
1830 if(dname_is_root(name))
1832 dname_remove_label(&name, &len);
1834 d = lz_find_node(z, name, len, labs);
1838 /** find and remove type from list in domain struct */
1840 del_local_rrset(struct local_data* d, uint16_t dtype)
1842 struct local_rrset* prev=NULL, *p=d->rrsets;
1843 while(p && ntohs(p->rrset->rk.type) != dtype) {
1848 return; /* rrset type not found */
1850 if(prev) prev->next = p->next;
1851 else d->rrsets = p->next;
1852 /* no memory recycling for zone deletions ... */
1855 void local_zones_del_data(struct local_zones* zones,
1856 uint8_t* name, size_t len, int labs, uint16_t dclass)
1859 struct local_zone* z;
1860 struct local_data* d;
1863 lock_rw_rdlock(&zones->lock);
1864 z = local_zones_lookup(zones, name, len, labs, dclass, LDNS_RR_TYPE_DS);
1866 lock_rw_wrlock(&z->lock);
1867 d = lz_find_node(z, name, len, labs);
1869 del_local_rrset(d, LDNS_RR_TYPE_DS);
1870 del_empty_term(z, d, name, len, labs);
1872 lock_rw_unlock(&z->lock);
1874 lock_rw_unlock(&zones->lock);
1876 /* remove other types */
1877 lock_rw_rdlock(&zones->lock);
1878 z = local_zones_lookup(zones, name, len, labs, dclass, 0);
1880 /* no such zone, we're done */
1881 lock_rw_unlock(&zones->lock);
1884 lock_rw_wrlock(&z->lock);
1885 lock_rw_unlock(&zones->lock);
1887 /* find the domain */
1888 d = lz_find_node(z, name, len, labs);
1890 /* no memory recycling for zone deletions ... */
1892 /* did we delete the soa record ? */
1893 if(query_dname_compare(d->name, z->name) == 0)
1896 /* cleanup the empty nonterminals for this name */
1897 del_empty_term(z, d, name, len, labs);
1900 lock_rw_unlock(&z->lock);