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"
57 local_zones_create(void)
59 struct local_zones* zones = (struct local_zones*)calloc(1,
63 rbtree_init(&zones->ztree, &local_zone_cmp);
64 lock_rw_init(&zones->lock);
65 lock_protect(&zones->lock, &zones->ztree, sizeof(zones->ztree));
66 /* also lock protects the rbnode's in struct local_zone */
70 /** helper traverse to delete zones */
72 lzdel(rbnode_t* n, void* ATTR_UNUSED(arg))
74 struct local_zone* z = (struct local_zone*)n->key;
79 local_zones_delete(struct local_zones* zones)
83 lock_rw_destroy(&zones->lock);
84 /* walk through zones and delete them all */
85 traverse_postorder(&zones->ztree, lzdel, NULL);
90 local_zone_delete(struct local_zone* z)
94 lock_rw_destroy(&z->lock);
95 regional_destroy(z->region);
102 local_zone_cmp(const void* z1, const void* z2)
104 /* first sort on class, so that hierarchy can be maintained within
106 struct local_zone* a = (struct local_zone*)z1;
107 struct local_zone* b = (struct local_zone*)z2;
109 if(a->dclass != b->dclass) {
110 if(a->dclass < b->dclass)
114 return dname_lab_cmp(a->name, a->namelabs, b->name, b->namelabs, &m);
118 local_data_cmp(const void* d1, const void* d2)
120 struct local_data* a = (struct local_data*)d1;
121 struct local_data* b = (struct local_data*)d2;
123 return dname_canon_lab_cmp(a->name, a->namelabs, b->name,
127 /* form wireformat from text format domain name */
129 parse_dname(const char* str, uint8_t** res, size_t* len, int* labs)
131 *res = sldns_str2wire_dname(str, len);
134 log_err("cannot parse name %s", str);
137 *labs = dname_count_size_labels(*res, len);
141 /** create a new localzone */
142 static struct local_zone*
143 local_zone_create(uint8_t* nm, size_t len, int labs,
144 enum localzone_type t, uint16_t dclass)
146 struct local_zone* z = (struct local_zone*)calloc(1, sizeof(*z));
156 lock_rw_init(&z->lock);
157 z->region = regional_create();
162 rbtree_init(&z->data, &local_data_cmp);
163 lock_protect(&z->lock, &z->parent, sizeof(*z)-sizeof(rbnode_t));
164 /* also the zones->lock protects node, parent, name*, class */
168 /** enter a new zone with allocated dname returns with WRlock */
169 static struct local_zone*
170 lz_enter_zone_dname(struct local_zones* zones, uint8_t* nm, size_t len,
171 int labs, enum localzone_type t, uint16_t c)
173 struct local_zone* z = local_zone_create(nm, len, labs, t, c);
176 log_err("out of memory");
181 lock_rw_wrlock(&zones->lock);
182 lock_rw_wrlock(&z->lock);
183 if(!rbtree_insert(&zones->ztree, &z->node)) {
184 log_warn("duplicate local-zone");
185 lock_rw_unlock(&z->lock);
186 local_zone_delete(z);
187 /* find the correct zone, so not an error for duplicate */
188 z = local_zones_find(zones, nm, len, labs, c);
189 lock_rw_wrlock(&z->lock);
190 lock_rw_unlock(&zones->lock);
193 lock_rw_unlock(&zones->lock);
197 /** enter a new zone */
198 static struct local_zone*
199 lz_enter_zone(struct local_zones* zones, const char* name, const char* type,
202 struct local_zone* z;
203 enum localzone_type t;
207 if(!parse_dname(name, &nm, &len, &labs)) {
208 log_err("bad zone name %s %s", name, type);
211 if(!local_zone_str2type(type, &t)) {
212 log_err("bad lz_enter_zone type %s %s", name, type);
216 if(!(z=lz_enter_zone_dname(zones, nm, len, labs, t, dclass))) {
217 log_err("could not enter zone %s %s", name, type);
223 /** return name and class and rdata of rr; parses string */
225 get_rr_content(const char* str, uint8_t** nm, uint16_t* type,
226 uint16_t* dclass, time_t* ttl, uint8_t* rr, size_t len,
227 uint8_t** rdata, size_t* rdata_len)
229 size_t dname_len = 0;
230 int e = sldns_str2wire_rr_buf(str, rr, &len, &dname_len, 3600,
233 log_err("error parsing local-data at %d: '%s': %s",
234 LDNS_WIREPARSE_OFFSET(e), str,
235 sldns_get_errorstr_parse(e));
238 *nm = memdup(rr, dname_len);
240 log_err("out of memory");
243 *dclass = sldns_wirerr_get_class(rr, len, dname_len);
244 *type = sldns_wirerr_get_type(rr, len, dname_len);
245 *ttl = (time_t)sldns_wirerr_get_ttl(rr, len, dname_len);
246 *rdata = sldns_wirerr_get_rdatawl(rr, len, dname_len);
247 *rdata_len = sldns_wirerr_get_rdatalen(rr, len, dname_len)+2;
251 /** return name and class of rr; parses string */
253 get_rr_nameclass(const char* str, uint8_t** nm, uint16_t* dclass)
255 uint8_t rr[LDNS_RR_BUF_SIZE];
256 size_t len = sizeof(rr), dname_len = 0;
257 int s = sldns_str2wire_rr_buf(str, rr, &len, &dname_len, 3600,
260 log_err("error parsing local-data at %d '%s': %s",
261 LDNS_WIREPARSE_OFFSET(s), str,
262 sldns_get_errorstr_parse(s));
265 *nm = memdup(rr, dname_len);
266 *dclass = sldns_wirerr_get_class(rr, len, dname_len);
268 log_err("out of memory");
275 * Find an rrset in local data structure.
276 * @param data: local data domain name structure.
277 * @param type: type to look for (host order).
278 * @return rrset pointer or NULL if not found.
280 static struct local_rrset*
281 local_data_find_type(struct local_data* data, uint16_t type)
283 struct local_rrset* p;
285 for(p = data->rrsets; p; p = p->next) {
286 if(p->rrset->rk.type == type)
292 /** check for RR duplicates */
294 rr_is_duplicate(struct packed_rrset_data* pd, uint8_t* rdata, size_t rdata_len)
297 for(i=0; i<pd->count; i++) {
298 if(pd->rr_len[i] == rdata_len &&
299 memcmp(pd->rr_data[i], rdata, rdata_len) == 0)
305 /** new local_rrset */
306 static struct local_rrset*
307 new_local_rrset(struct regional* region, struct local_data* node,
308 uint16_t rrtype, uint16_t rrclass)
310 struct packed_rrset_data* pd;
311 struct local_rrset* rrset = (struct local_rrset*)
312 regional_alloc_zero(region, sizeof(*rrset));
314 log_err("out of memory");
317 rrset->next = node->rrsets;
318 node->rrsets = rrset;
319 rrset->rrset = (struct ub_packed_rrset_key*)
320 regional_alloc_zero(region, sizeof(*rrset->rrset));
322 log_err("out of memory");
325 rrset->rrset->entry.key = rrset->rrset;
326 pd = (struct packed_rrset_data*)regional_alloc_zero(region,
329 log_err("out of memory");
332 pd->trust = rrset_trust_prim_noglue;
333 pd->security = sec_status_insecure;
334 rrset->rrset->entry.data = pd;
335 rrset->rrset->rk.dname = node->name;
336 rrset->rrset->rk.dname_len = node->namelen;
337 rrset->rrset->rk.type = htons(rrtype);
338 rrset->rrset->rk.rrset_class = htons(rrclass);
342 /** insert RR into RRset data structure; Wastes a couple of bytes */
344 insert_rr(struct regional* region, struct packed_rrset_data* pd,
345 uint8_t* rdata, size_t rdata_len, time_t ttl)
347 size_t* oldlen = pd->rr_len;
348 time_t* oldttl = pd->rr_ttl;
349 uint8_t** olddata = pd->rr_data;
351 /* add RR to rrset */
353 pd->rr_len = regional_alloc(region, sizeof(*pd->rr_len)*pd->count);
354 pd->rr_ttl = regional_alloc(region, sizeof(*pd->rr_ttl)*pd->count);
355 pd->rr_data = regional_alloc(region, sizeof(*pd->rr_data)*pd->count);
356 if(!pd->rr_len || !pd->rr_ttl || !pd->rr_data) {
357 log_err("out of memory");
361 memcpy(pd->rr_len+1, oldlen,
362 sizeof(*pd->rr_len)*(pd->count-1));
363 memcpy(pd->rr_ttl+1, oldttl,
364 sizeof(*pd->rr_ttl)*(pd->count-1));
365 memcpy(pd->rr_data+1, olddata,
366 sizeof(*pd->rr_data)*(pd->count-1));
368 pd->rr_len[0] = rdata_len;
370 pd->rr_data[0] = regional_alloc_init(region, rdata, rdata_len);
371 if(!pd->rr_data[0]) {
372 log_err("out of memory");
378 /** find a data node by exact name */
379 static struct local_data*
380 lz_find_node(struct local_zone* z, uint8_t* nm, size_t nmlen, int nmlabs)
382 struct local_data key;
386 key.namelabs = nmlabs;
387 return (struct local_data*)rbtree_search(&z->data, &key.node);
390 /** find a node, create it if not and all its empty nonterminal parents */
392 lz_find_create_node(struct local_zone* z, uint8_t* nm, size_t nmlen,
393 int nmlabs, struct local_data** res)
395 struct local_data* ld = lz_find_node(z, nm, nmlen, nmlabs);
397 /* create a domain name to store rr. */
398 ld = (struct local_data*)regional_alloc_zero(z->region,
401 log_err("out of memory adding local data");
405 ld->name = regional_alloc_init(z->region, nm, nmlen);
407 log_err("out of memory");
411 ld->namelabs = nmlabs;
412 if(!rbtree_insert(&z->data, &ld->node)) {
413 log_assert(0); /* duplicate name */
415 /* see if empty nonterminals need to be created */
416 if(nmlabs > z->namelabs) {
417 dname_remove_label(&nm, &nmlen);
418 if(!lz_find_create_node(z, nm, nmlen, nmlabs-1, res))
426 /** enter data RR into auth zone */
428 lz_enter_rr_into_zone(struct local_zone* z, const char* rrstr)
433 struct local_data* node;
434 struct local_rrset* rrset;
435 struct packed_rrset_data* pd;
436 uint16_t rrtype = 0, rrclass = 0;
438 uint8_t rr[LDNS_RR_BUF_SIZE];
441 if(!get_rr_content(rrstr, &nm, &rrtype, &rrclass, &ttl, rr, sizeof(rr),
442 &rdata, &rdata_len)) {
443 log_err("bad local-data: %s", rrstr);
446 log_assert(z->dclass == rrclass);
447 if(z->type == local_zone_redirect &&
448 query_dname_compare(z->name, nm) != 0) {
449 log_err("local-data in redirect zone must reside at top of zone"
450 ", not at %s", rrstr);
454 nmlabs = dname_count_size_labels(nm, &nmlen);
455 if(!lz_find_create_node(z, nm, nmlen, nmlabs, &node)) {
462 rrset = local_data_find_type(node, rrtype);
464 rrset = new_local_rrset(z->region, node, rrtype, rrclass);
467 if(query_dname_compare(node->name, z->name) == 0) {
468 if(rrtype == LDNS_RR_TYPE_NSEC)
469 rrset->rrset->rk.flags = PACKED_RRSET_NSEC_AT_APEX;
470 if(rrtype == LDNS_RR_TYPE_SOA)
471 z->soa = rrset->rrset;
474 pd = (struct packed_rrset_data*)rrset->rrset->entry.data;
475 log_assert(rrset && pd);
477 /* check for duplicate RR */
478 if(rr_is_duplicate(pd, rdata, rdata_len)) {
479 verbose(VERB_ALGO, "ignoring duplicate RR: %s", rrstr);
482 return insert_rr(z->region, pd, rdata, rdata_len, ttl);
485 /** enter a data RR into auth data; a zone for it must exist */
487 lz_enter_rr_str(struct local_zones* zones, const char* rr)
493 struct local_zone* z;
495 if(!get_rr_nameclass(rr, &rr_name, &rr_class)) {
496 log_err("bad rr %s", rr);
499 labs = dname_count_size_labels(rr_name, &len);
500 lock_rw_rdlock(&zones->lock);
501 z = local_zones_lookup(zones, rr_name, len, labs, rr_class);
503 lock_rw_unlock(&zones->lock);
504 fatal_exit("internal error: no zone for rr %s", rr);
506 lock_rw_wrlock(&z->lock);
507 lock_rw_unlock(&zones->lock);
509 r = lz_enter_rr_into_zone(z, rr);
510 lock_rw_unlock(&z->lock);
514 /** enter tagstring into zone */
516 lz_enter_zone_tag(struct local_zones* zones, char* zname, uint8_t* list,
517 size_t len, uint16_t rr_class)
519 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
520 size_t dname_len = sizeof(dname);
521 int dname_labs, r = 0;
522 struct local_zone* z;
524 if(sldns_str2wire_dname_buf(zname, dname, &dname_len) != 0) {
525 log_err("cannot parse zone name in local-zone-tag: %s", zname);
528 dname_labs = dname_count_labels(dname);
530 lock_rw_rdlock(&zones->lock);
531 z = local_zones_find(zones, dname, dname_len, dname_labs, rr_class);
533 lock_rw_unlock(&zones->lock);
534 log_err("no local-zone for tag %s", zname);
537 lock_rw_wrlock(&z->lock);
538 lock_rw_unlock(&zones->lock);
540 z->taglist = memdup(list, len);
544 lock_rw_unlock(&z->lock);
548 /** enter override into zone */
550 lz_enter_override(struct local_zones* zones, char* zname, char* netblock,
551 char* type, uint16_t rr_class)
553 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
554 size_t dname_len = sizeof(dname);
556 struct sockaddr_storage addr;
559 struct local_zone* z;
560 enum localzone_type t;
562 /* parse zone name */
563 if(sldns_str2wire_dname_buf(zname, dname, &dname_len) != 0) {
564 log_err("cannot parse zone name in local-zone-override: %s %s",
568 dname_labs = dname_count_labels(dname);
571 if(!netblockstrtoaddr(netblock, UNBOUND_DNS_PORT, &addr, &addrlen,
573 log_err("cannot parse netblock in local-zone-override: %s %s",
578 /* parse zone type */
579 if(!local_zone_str2type(type, &t)) {
580 log_err("cannot parse type in local-zone-override: %s %s %s",
581 zname, netblock, type);
585 /* find localzone entry */
586 lock_rw_rdlock(&zones->lock);
587 z = local_zones_find(zones, dname, dname_len, dname_labs, rr_class);
589 lock_rw_unlock(&zones->lock);
590 log_err("no local-zone for local-zone-override %s", zname);
593 lock_rw_wrlock(&z->lock);
594 lock_rw_unlock(&zones->lock);
596 /* create netblock addr_tree if not present yet */
597 if(!z->override_tree) {
598 z->override_tree = (struct rbtree_t*)regional_alloc_zero(
599 z->region, sizeof(*z->override_tree));
600 if(!z->override_tree) {
601 lock_rw_unlock(&z->lock);
602 log_err("out of memory");
605 addr_tree_init(z->override_tree);
607 /* add new elem to tree */
608 if(z->override_tree) {
609 struct local_zone_override* n;
610 n = (struct local_zone_override*)regional_alloc_zero(
611 z->region, sizeof(*n));
613 lock_rw_unlock(&z->lock);
614 log_err("out of memory");
618 if(!addr_tree_insert(z->override_tree,
619 (struct addr_tree_node*)n, &addr, addrlen, net)) {
620 lock_rw_unlock(&z->lock);
621 log_err("duplicate local-zone-override %s %s",
627 lock_rw_unlock(&z->lock);
631 /** parse local-zone: statements */
633 lz_enter_zones(struct local_zones* zones, struct config_file* cfg)
635 struct config_str2list* p;
636 struct local_zone* z;
637 for(p = cfg->local_zones; p; p = p->next) {
638 if(!(z=lz_enter_zone(zones, p->str, p->str2,
641 lock_rw_unlock(&z->lock);
646 /** lookup a zone in rbtree; exact match only; SLOW due to parse */
648 lz_exists(struct local_zones* zones, const char* name)
652 z.dclass = LDNS_RR_CLASS_IN;
653 if(!parse_dname(name, &z.name, &z.namelen, &z.namelabs)) {
654 log_err("bad name %s", name);
657 lock_rw_rdlock(&zones->lock);
658 if(rbtree_search(&zones->ztree, &z.node)) {
659 lock_rw_unlock(&zones->lock);
663 lock_rw_unlock(&zones->lock);
668 /** lookup a zone in cfg->nodefault list */
670 lz_nodefault(struct config_file* cfg, const char* name)
672 struct config_strlist* p;
673 size_t len = strlen(name);
674 if(len == 0) return 0;
675 if(name[len-1] == '.') len--;
677 for(p = cfg->local_zones_nodefault; p; p = p->next) {
678 /* compare zone name, lowercase, compare without ending . */
679 if(strncasecmp(p->str, name, len) == 0 &&
680 (strlen(p->str) == len || (strlen(p->str)==len+1 &&
681 p->str[len] == '.')))
687 /** enter AS112 default zone */
689 add_as112_default(struct local_zones* zones, struct config_file* cfg,
692 struct local_zone* z;
693 char str[1024]; /* known long enough */
694 if(lz_exists(zones, name) || lz_nodefault(cfg, name))
695 return 1; /* do not enter default content */
696 if(!(z=lz_enter_zone(zones, name, "static", LDNS_RR_CLASS_IN)))
698 snprintf(str, sizeof(str), "%s 10800 IN SOA localhost. "
699 "nobody.invalid. 1 3600 1200 604800 10800", name);
700 if(!lz_enter_rr_into_zone(z, str)) {
701 lock_rw_unlock(&z->lock);
704 snprintf(str, sizeof(str), "%s 10800 IN NS localhost. ", name);
705 if(!lz_enter_rr_into_zone(z, str)) {
706 lock_rw_unlock(&z->lock);
709 lock_rw_unlock(&z->lock);
713 /** enter default zones */
715 lz_enter_defaults(struct local_zones* zones, struct config_file* cfg)
717 struct local_zone* z;
720 /* this list of zones is from RFC 6303 and RFC 7686 */
722 /* block localhost level zones first, then onion and later the LAN zones */
724 /* localhost. zone */
725 if(!lz_exists(zones, "localhost.") &&
726 !lz_nodefault(cfg, "localhost.")) {
727 if(!(z=lz_enter_zone(zones, "localhost.", "static",
728 LDNS_RR_CLASS_IN)) ||
729 !lz_enter_rr_into_zone(z,
730 "localhost. 10800 IN NS localhost.") ||
731 !lz_enter_rr_into_zone(z,
732 "localhost. 10800 IN SOA localhost. nobody.invalid. "
733 "1 3600 1200 604800 10800") ||
734 !lz_enter_rr_into_zone(z,
735 "localhost. 10800 IN A 127.0.0.1") ||
736 !lz_enter_rr_into_zone(z,
737 "localhost. 10800 IN AAAA ::1")) {
738 log_err("out of memory adding default zone");
739 if(z) { lock_rw_unlock(&z->lock); }
742 lock_rw_unlock(&z->lock);
744 /* reverse ip4 zone */
745 if(!lz_exists(zones, "127.in-addr.arpa.") &&
746 !lz_nodefault(cfg, "127.in-addr.arpa.")) {
747 if(!(z=lz_enter_zone(zones, "127.in-addr.arpa.", "static",
748 LDNS_RR_CLASS_IN)) ||
749 !lz_enter_rr_into_zone(z,
750 "127.in-addr.arpa. 10800 IN NS localhost.") ||
751 !lz_enter_rr_into_zone(z,
752 "127.in-addr.arpa. 10800 IN SOA localhost. "
753 "nobody.invalid. 1 3600 1200 604800 10800") ||
754 !lz_enter_rr_into_zone(z,
755 "1.0.0.127.in-addr.arpa. 10800 IN PTR localhost.")) {
756 log_err("out of memory adding default zone");
757 if(z) { lock_rw_unlock(&z->lock); }
760 lock_rw_unlock(&z->lock);
762 /* reverse ip6 zone */
763 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.") &&
764 !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.")) {
765 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",
766 LDNS_RR_CLASS_IN)) ||
767 !lz_enter_rr_into_zone(z,
768 "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.") ||
769 !lz_enter_rr_into_zone(z,
770 "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. "
771 "nobody.invalid. 1 3600 1200 604800 10800") ||
772 !lz_enter_rr_into_zone(z,
773 "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.")) {
774 log_err("out of memory adding default zone");
775 if(z) { lock_rw_unlock(&z->lock); }
778 lock_rw_unlock(&z->lock);
780 /* onion. zone (RFC 7686) */
781 if(!lz_exists(zones, "onion.") &&
782 !lz_nodefault(cfg, "onion.")) {
783 if(!(z=lz_enter_zone(zones, "onion.", "static",
784 LDNS_RR_CLASS_IN)) ||
785 !lz_enter_rr_into_zone(z,
786 "onion. 10800 IN NS localhost.") ||
787 !lz_enter_rr_into_zone(z,
788 "onion. 10800 IN SOA localhost. nobody.invalid. "
789 "1 3600 1200 604800 10800")) {
790 log_err("out of memory adding default zone");
791 if(z) { lock_rw_unlock(&z->lock); }
794 lock_rw_unlock(&z->lock);
797 /* block AS112 zones, unless asked not to */
798 if(!cfg->unblock_lan_zones) {
799 for(zstr = as112_zones; *zstr; zstr++) {
800 if(!add_as112_default(zones, cfg, *zstr)) {
801 log_err("out of memory adding default zone");
809 /** parse local-zone-override: statements */
811 lz_enter_overrides(struct local_zones* zones, struct config_file* cfg)
813 struct config_str3list* p;
814 for(p = cfg->local_zone_overrides; p; p = p->next) {
815 if(!lz_enter_override(zones, p->str, p->str2, p->str3,
822 /** setup parent pointers, so that a lookup can be done for closest match */
824 init_parents(struct local_zones* zones)
826 struct local_zone* node, *prev = NULL, *p;
828 lock_rw_wrlock(&zones->lock);
829 RBTREE_FOR(node, struct local_zone*, &zones->ztree) {
830 lock_rw_wrlock(&node->lock);
832 if(!prev || prev->dclass != node->dclass) {
834 lock_rw_unlock(&node->lock);
837 (void)dname_lab_cmp(prev->name, prev->namelabs, node->name,
838 node->namelabs, &m); /* we know prev is smaller */
839 /* sort order like: . com. bla.com. zwb.com. net. */
840 /* find the previous, or parent-parent-parent */
841 for(p = prev; p; p = p->parent)
842 /* looking for name with few labels, a parent */
843 if(p->namelabs <= m) {
844 /* ==: since prev matched m, this is closest*/
845 /* <: prev matches more, but is not a parent,
846 * this one is a (grand)parent */
852 if(node->override_tree)
853 addr_tree_init_parents(node->override_tree);
854 lock_rw_unlock(&node->lock);
856 lock_rw_unlock(&zones->lock);
859 /** enter implicit transparent zone for local-data: without local-zone: */
861 lz_setup_implicit(struct local_zones* zones, struct config_file* cfg)
863 /* walk over all items that have no parent zone and find
864 * the name that covers them all (could be the root) and
865 * add that as a transparent zone */
866 struct config_strlist* p;
868 int have_other_classes = 0;
873 int match = 0; /* number of labels match count */
875 init_parents(zones); /* to enable local_zones_lookup() */
876 for(p = cfg->local_data; p; p = p->next) {
881 if(!get_rr_nameclass(p->str, &rr_name, &rr_class)) {
882 log_err("Bad local-data RR %s", p->str);
885 labs = dname_count_size_labels(rr_name, &len);
886 lock_rw_rdlock(&zones->lock);
887 if(!local_zones_lookup(zones, rr_name, len, labs, rr_class)) {
897 if(rr_class != dclass) {
898 /* process other classes later */
900 have_other_classes = 1;
901 lock_rw_unlock(&zones->lock);
904 /* find smallest shared topdomain */
905 (void)dname_lab_cmp(nm, nmlabs,
911 } else free(rr_name);
912 lock_rw_unlock(&zones->lock);
916 struct local_zone* z;
917 /* allocate zone of smallest shared topdomain to contain em */
919 dname_remove_labels(&n2, &nmlen, nmlabs - match);
920 n2 = memdup(n2, nmlen);
923 log_err("out of memory");
926 log_nametypeclass(VERB_ALGO, "implicit transparent local-zone",
928 if(!(z=lz_enter_zone_dname(zones, n2, nmlen, match,
929 local_zone_transparent, dclass))) {
932 lock_rw_unlock(&z->lock);
934 if(have_other_classes) {
935 /* restart to setup other class */
936 return lz_setup_implicit(zones, cfg);
941 /** enter local-zone-tag info */
943 lz_enter_zone_tags(struct local_zones* zones, struct config_file* cfg)
945 struct config_strbytelist* p;
947 for(p = cfg->local_zone_tags; p; p = p->next) {
948 if(!lz_enter_zone_tag(zones, p->str, p->str2, p->str2len,
953 if(c) verbose(VERB_ALGO, "applied tags to %d local zones", c);
957 /** enter auth data */
959 lz_enter_data(struct local_zones* zones, struct config_file* cfg)
961 struct config_strlist* p;
962 for(p = cfg->local_data; p; p = p->next) {
963 if(!lz_enter_rr_str(zones, p->str))
969 /** free memory from config */
971 lz_freeup_cfg(struct config_file* cfg)
973 config_deldblstrlist(cfg->local_zones);
974 cfg->local_zones = NULL;
975 config_delstrlist(cfg->local_zones_nodefault);
976 cfg->local_zones_nodefault = NULL;
977 config_delstrlist(cfg->local_data);
978 cfg->local_data = NULL;
982 local_zones_apply_cfg(struct local_zones* zones, struct config_file* cfg)
984 /* create zones from zone statements. */
985 if(!lz_enter_zones(zones, cfg)) {
988 /* apply default zones+content (unless disabled, or overridden) */
989 if(!lz_enter_defaults(zones, cfg)) {
992 /* enter local zone overrides */
993 if(!lz_enter_overrides(zones, cfg)) {
996 /* create implicit transparent zone from data. */
997 if(!lz_setup_implicit(zones, cfg)) {
1001 /* setup parent ptrs for lookup during data entry */
1002 init_parents(zones);
1003 /* insert local zone tags */
1004 if(!lz_enter_zone_tags(zones, cfg)) {
1007 /* insert local data */
1008 if(!lz_enter_data(zones, cfg)) {
1011 /* freeup memory from cfg struct. */
1017 local_zones_lookup(struct local_zones* zones,
1018 uint8_t* name, size_t len, int labs, uint16_t dclass)
1020 return local_zones_tags_lookup(zones, name, len, labs,
1021 dclass, NULL, 0, 1);
1025 local_zones_tags_lookup(struct local_zones* zones,
1026 uint8_t* name, size_t len, int labs, uint16_t dclass,
1027 uint8_t* taglist, size_t taglen, int ignoretags)
1029 rbnode_t* res = NULL;
1030 struct local_zone *result;
1031 struct local_zone key;
1033 key.node.key = &key;
1034 key.dclass = dclass;
1037 key.namelabs = labs;
1038 rbtree_find_less_equal(&zones->ztree, &key, &res);
1039 result = (struct local_zone*)res;
1040 /* exact or smaller element (or no element) */
1041 if(!result || result->dclass != dclass)
1043 /* count number of labels matched */
1044 (void)dname_lab_cmp(result->name, result->namelabs, key.name,
1046 while(result) { /* go up until qname is zone or subdomain of zone */
1047 if(result->namelabs <= m)
1048 if(ignoretags || !result->taglist ||
1049 taglist_intersect(result->taglist,
1050 result->taglen, taglist, taglen))
1052 result = result->parent;
1058 local_zones_find(struct local_zones* zones,
1059 uint8_t* name, size_t len, int labs, uint16_t dclass)
1061 struct local_zone key;
1062 key.node.key = &key;
1063 key.dclass = dclass;
1066 key.namelabs = labs;
1068 return (struct local_zone*)rbtree_search(&zones->ztree, &key);
1071 /** print all RRsets in local zone */
1073 local_zone_out(struct local_zone* z)
1075 struct local_data* d;
1076 struct local_rrset* p;
1077 RBTREE_FOR(d, struct local_data*, &z->data) {
1078 for(p = d->rrsets; p; p = p->next) {
1079 log_nametypeclass(0, "rrset", d->name,
1080 ntohs(p->rrset->rk.type),
1081 ntohs(p->rrset->rk.rrset_class));
1086 void local_zones_print(struct local_zones* zones)
1088 struct local_zone* z;
1089 lock_rw_rdlock(&zones->lock);
1090 log_info("number of auth zones %u", (unsigned)zones->ztree.count);
1091 RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
1092 lock_rw_rdlock(&z->lock);
1094 case local_zone_deny:
1095 log_nametypeclass(0, "deny zone",
1096 z->name, 0, z->dclass);
1098 case local_zone_refuse:
1099 log_nametypeclass(0, "refuse zone",
1100 z->name, 0, z->dclass);
1102 case local_zone_redirect:
1103 log_nametypeclass(0, "redirect zone",
1104 z->name, 0, z->dclass);
1106 case local_zone_transparent:
1107 log_nametypeclass(0, "transparent zone",
1108 z->name, 0, z->dclass);
1110 case local_zone_typetransparent:
1111 log_nametypeclass(0, "typetransparent zone",
1112 z->name, 0, z->dclass);
1114 case local_zone_static:
1115 log_nametypeclass(0, "static zone",
1116 z->name, 0, z->dclass);
1118 case local_zone_inform:
1119 log_nametypeclass(0, "inform zone",
1120 z->name, 0, z->dclass);
1122 case local_zone_inform_deny:
1123 log_nametypeclass(0, "inform_deny zone",
1124 z->name, 0, z->dclass);
1126 case local_zone_always_transparent:
1127 log_nametypeclass(0, "always_transparent zone",
1128 z->name, 0, z->dclass);
1130 case local_zone_always_refuse:
1131 log_nametypeclass(0, "always_refuse zone",
1132 z->name, 0, z->dclass);
1134 case local_zone_always_nxdomain:
1135 log_nametypeclass(0, "always_nxdomain zone",
1136 z->name, 0, z->dclass);
1139 log_nametypeclass(0, "badtyped zone",
1140 z->name, 0, z->dclass);
1144 lock_rw_unlock(&z->lock);
1146 lock_rw_unlock(&zones->lock);
1149 /** encode answer consisting of 1 rrset */
1151 local_encode(struct query_info* qinfo, struct edns_data* edns,
1152 sldns_buffer* buf, struct regional* temp,
1153 struct ub_packed_rrset_key* rrset, int ansec, int rcode)
1155 struct reply_info rep;
1157 /* make answer with time=0 for fixed TTL values */
1158 memset(&rep, 0, sizeof(rep));
1159 rep.flags = (uint16_t)((BIT_QR | BIT_AA | BIT_RA) | rcode);
1162 rep.an_numrrsets = 1;
1163 else rep.ns_numrrsets = 1;
1164 rep.rrset_count = 1;
1165 rep.rrsets = &rrset;
1166 udpsize = edns->udp_size;
1167 edns->edns_version = EDNS_ADVERTISED_VERSION;
1168 edns->udp_size = EDNS_ADVERTISED_SIZE;
1169 edns->ext_rcode = 0;
1170 edns->bits &= EDNS_DO;
1171 if(!edns_opt_inplace_reply(edns, temp) ||
1172 !reply_info_answer_encode(qinfo, &rep,
1173 *(uint16_t*)sldns_buffer_begin(buf),
1174 sldns_buffer_read_u16_at(buf, 2),
1175 buf, 0, 0, temp, udpsize, edns,
1176 (int)(edns->bits&EDNS_DO), 0))
1177 error_encode(buf, (LDNS_RCODE_SERVFAIL|BIT_AA), qinfo,
1178 *(uint16_t*)sldns_buffer_begin(buf),
1179 sldns_buffer_read_u16_at(buf, 2), edns);
1183 /** find local data tag string match for the given type in the list */
1185 find_tag_datas(struct query_info* qinfo, struct config_strlist* list,
1186 struct ub_packed_rrset_key* r, struct regional* temp,
1187 uint8_t* zname, size_t zlen)
1189 struct config_strlist* p;
1191 uint8_t rr[LDNS_RR_BUF_SIZE];
1194 struct packed_rrset_data* d;
1195 for(p=list; p; p=p->next) {
1197 /* does this element match the type? */
1198 snprintf(buf, sizeof(buf), ". %s", p->str);
1199 res = sldns_str2wire_rr_buf(buf, rr, &len, NULL, 3600,
1200 zname, zlen, NULL, 0);
1202 /* parse errors are already checked before, in
1203 * acllist check_data, skip this for robustness */
1205 if(len < 1 /* . */ + 8 /* typeclassttl*/ + 2 /*rdatalen*/)
1207 if(sldns_wirerr_get_type(rr, len, 1) != qinfo->qtype)
1210 /* do we have entries already? if not setup key */
1211 if(r->rk.dname == NULL) {
1213 r->rk.dname = qinfo->qname;
1214 r->rk.dname_len = qinfo->qname_len;
1215 r->rk.type = htons(qinfo->qtype);
1216 r->rk.rrset_class = htons(qinfo->qclass);
1218 d = (struct packed_rrset_data*)regional_alloc_zero(
1219 temp, sizeof(struct packed_rrset_data)
1220 + sizeof(size_t) + sizeof(uint8_t*) +
1222 if(!d) return 0; /* out of memory */
1224 d->ttl = sldns_wirerr_get_ttl(rr, len, 1);
1225 d->rr_len = (size_t*)((uint8_t*)d +
1226 sizeof(struct packed_rrset_data));
1227 d->rr_data = (uint8_t**)&(d->rr_len[1]);
1228 d->rr_ttl = (time_t*)&(d->rr_data[1]);
1230 d = (struct packed_rrset_data*)r->entry.data;
1231 /* add entry to the data */
1233 size_t* oldlen = d->rr_len;
1234 uint8_t** olddata = d->rr_data;
1235 time_t* oldttl = d->rr_ttl;
1236 /* increase arrays for lookup */
1237 /* this is of course slow for very many records,
1238 * but most redirects are expected with few records */
1239 d->rr_len = (size_t*)regional_alloc_zero(temp,
1240 (d->count+1)*sizeof(size_t));
1241 d->rr_data = (uint8_t**)regional_alloc_zero(temp,
1242 (d->count+1)*sizeof(uint8_t*));
1243 d->rr_ttl = (time_t*)regional_alloc_zero(temp,
1244 (d->count+1)*sizeof(time_t));
1245 if(!d->rr_len || !d->rr_data || !d->rr_ttl)
1246 return 0; /* out of memory */
1247 /* first one was allocated after struct d, but new
1248 * ones get their own array increment alloc, so
1249 * copy old content */
1250 memmove(d->rr_len, oldlen, d->count*sizeof(size_t));
1251 memmove(d->rr_data, olddata, d->count*sizeof(uint8_t*));
1252 memmove(d->rr_ttl, oldttl, d->count*sizeof(time_t));
1255 d->rr_len[d->count] = sldns_wirerr_get_rdatalen(rr, len, 1)+2;
1256 d->rr_ttl[d->count] = sldns_wirerr_get_ttl(rr, len, 1);
1257 d->rr_data[d->count] = regional_alloc_init(temp,
1258 sldns_wirerr_get_rdatawl(rr, len, 1),
1259 d->rr_len[d->count]);
1260 if(!d->rr_data[d->count])
1261 if(!d) return 0; /* out of memory */
1269 /** answer local data match */
1271 local_data_answer(struct local_zone* z, struct query_info* qinfo,
1272 struct edns_data* edns, sldns_buffer* buf, struct regional* temp,
1273 int labs, struct local_data** ldp, enum localzone_type lz_type,
1274 int tag, struct config_strlist** tag_datas, size_t tag_datas_size,
1275 char** tagname, int num_tags)
1277 struct local_data key;
1278 struct local_data* ld;
1279 struct local_rrset* lr;
1280 key.node.key = &key;
1281 key.name = qinfo->qname;
1282 key.namelen = qinfo->qname_len;
1283 key.namelabs = labs;
1284 if(lz_type == local_zone_redirect) {
1286 key.namelen = z->namelen;
1287 key.namelabs = z->namelabs;
1288 if(tag != -1 && (size_t)tag<tag_datas_size && tag_datas[tag]) {
1289 struct ub_packed_rrset_key r;
1290 memset(&r, 0, sizeof(r));
1291 if(find_tag_datas(qinfo, tag_datas[tag], &r, temp,
1292 z->name, z->namelen)) {
1293 verbose(VERB_ALGO, "redirect with tag data [%d] %s",
1294 tag, (tag<num_tags?tagname[tag]:"null"));
1295 return local_encode(qinfo, edns, buf, temp,
1296 &r, 1, LDNS_RCODE_NOERROR);
1300 ld = (struct local_data*)rbtree_search(&z->data, &key.node);
1305 lr = local_data_find_type(ld, qinfo->qtype);
1308 if(lz_type == local_zone_redirect) {
1309 /* convert rrset name to query name; like a wildcard */
1310 struct ub_packed_rrset_key r = *lr->rrset;
1311 r.rk.dname = qinfo->qname;
1312 r.rk.dname_len = qinfo->qname_len;
1313 return local_encode(qinfo, edns, buf, temp, &r, 1,
1314 LDNS_RCODE_NOERROR);
1316 return local_encode(qinfo, edns, buf, temp, lr->rrset, 1,
1317 LDNS_RCODE_NOERROR);
1321 * answer in case where no exact match is found
1322 * @param z: zone for query
1323 * @param qinfo: query
1324 * @param edns: edns from query
1325 * @param buf: buffer for answer.
1326 * @param temp: temp region for encoding
1327 * @param ld: local data, if NULL, no such name exists in localdata.
1328 * @param lz_type: type of the local zone
1329 * @return 1 if a reply is to be sent, 0 if not.
1332 lz_zone_answer(struct local_zone* z, struct query_info* qinfo,
1333 struct edns_data* edns, sldns_buffer* buf, struct regional* temp,
1334 struct local_data* ld, enum localzone_type lz_type)
1336 if(lz_type == local_zone_deny || lz_type == local_zone_inform_deny) {
1337 /** no reply at all, signal caller by clearing buffer. */
1338 sldns_buffer_clear(buf);
1339 sldns_buffer_flip(buf);
1341 } else if(lz_type == local_zone_refuse
1342 || lz_type == local_zone_always_refuse) {
1343 error_encode(buf, (LDNS_RCODE_REFUSED|BIT_AA), qinfo,
1344 *(uint16_t*)sldns_buffer_begin(buf),
1345 sldns_buffer_read_u16_at(buf, 2), edns);
1347 } else if(lz_type == local_zone_static ||
1348 lz_type == local_zone_redirect ||
1349 lz_type == local_zone_always_nxdomain) {
1350 /* for static, reply nodata or nxdomain
1351 * for redirect, reply nodata */
1352 /* no additional section processing,
1353 * cname, dname or wildcard processing,
1354 * or using closest match for NSEC.
1355 * or using closest match for returning delegation downwards
1357 int rcode = (ld || lz_type == local_zone_redirect)?
1358 LDNS_RCODE_NOERROR:LDNS_RCODE_NXDOMAIN;
1360 return local_encode(qinfo, edns, buf, temp,
1362 error_encode(buf, (rcode|BIT_AA), qinfo,
1363 *(uint16_t*)sldns_buffer_begin(buf),
1364 sldns_buffer_read_u16_at(buf, 2), edns);
1366 } else if(lz_type == local_zone_typetransparent
1367 || lz_type == local_zone_always_transparent) {
1368 /* no NODATA or NXDOMAINS for this zone type */
1371 /* else lz_type == local_zone_transparent */
1373 /* if the zone is transparent and the name exists, but the type
1374 * does not, then we should make this noerror/nodata */
1375 if(ld && ld->rrsets) {
1376 int rcode = LDNS_RCODE_NOERROR;
1378 return local_encode(qinfo, edns, buf, temp,
1380 error_encode(buf, (rcode|BIT_AA), qinfo,
1381 *(uint16_t*)sldns_buffer_begin(buf),
1382 sldns_buffer_read_u16_at(buf, 2), edns);
1386 /* stop here, and resolve further on */
1390 /** print log information for an inform zone query */
1392 lz_inform_print(struct local_zone* z, struct query_info* qinfo,
1393 struct comm_reply* repinfo)
1395 char ip[128], txt[512];
1396 char zname[LDNS_MAX_DOMAINLEN+1];
1397 uint16_t port = ntohs(((struct sockaddr_in*)&repinfo->addr)->sin_port);
1398 dname_str(z->name, zname);
1399 addr_to_str(&repinfo->addr, repinfo->addrlen, ip, sizeof(ip));
1400 snprintf(txt, sizeof(txt), "%s inform %s@%u", zname, ip,
1402 log_nametypeclass(0, txt, qinfo->qname, qinfo->qtype, qinfo->qclass);
1405 static enum localzone_type
1406 lz_type(uint8_t *taglist, size_t taglen, uint8_t *taglist2, size_t taglen2,
1407 uint8_t *tagactions, size_t tagactionssize, enum localzone_type lzt,
1408 struct comm_reply* repinfo, struct rbtree_t* override_tree, int* tag,
1409 char** tagname, int num_tags)
1413 struct local_zone_override* lzo;
1414 if(repinfo && override_tree) {
1415 lzo = (struct local_zone_override*)addr_tree_lookup(
1416 override_tree, &repinfo->addr, repinfo->addrlen);
1417 if(lzo && lzo->type) {
1418 verbose(VERB_ALGO, "local zone override to type %s",
1419 local_zone_type2str(lzo->type));
1423 if(!taglist || !taglist2)
1425 for(i=0; i<taglen && i<taglen2; i++) {
1426 tagmatch = (taglist[i] & taglist2[i]);
1427 for(j=0; j<8 && tagmatch>0; j++) {
1428 if((tagmatch & 0x1)) {
1429 *tag = (int)(i*8+j);
1430 verbose(VERB_ALGO, "matched tag [%d] %s",
1431 *tag, (*tag<num_tags?tagname[*tag]:"null"));
1432 /* does this tag have a tag action? */
1433 if(i*8+j < tagactionssize && tagactions
1434 && tagactions[i*8+j] != 0) {
1435 verbose(VERB_ALGO, "tag action [%d] %s to type %s",
1436 *tag, (*tag<num_tags?tagname[*tag]:"null"),
1437 local_zone_type2str(
1438 (enum localzone_type)
1439 tagactions[i*8+j]));
1440 return (enum localzone_type)tagactions[i*8+j];
1451 local_zones_answer(struct local_zones* zones, struct query_info* qinfo,
1452 struct edns_data* edns, sldns_buffer* buf, struct regional* temp,
1453 struct comm_reply* repinfo, uint8_t* taglist, size_t taglen,
1454 uint8_t* tagactions, size_t tagactionssize,
1455 struct config_strlist** tag_datas, size_t tag_datas_size,
1456 char** tagname, int num_tags)
1458 /* see if query is covered by a zone,
1459 * if so: - try to match (exact) local data
1460 * - look at zone type for negative response. */
1461 int labs = dname_count_labels(qinfo->qname);
1462 struct local_data* ld = NULL;
1463 struct local_zone* z;
1464 enum localzone_type lzt;
1466 lock_rw_rdlock(&zones->lock);
1467 z = local_zones_tags_lookup(zones, qinfo->qname,
1468 qinfo->qname_len, labs, qinfo->qclass, taglist, taglen, 0);
1470 lock_rw_unlock(&zones->lock);
1473 lock_rw_rdlock(&z->lock);
1474 lock_rw_unlock(&zones->lock);
1476 lzt = lz_type(taglist, taglen, z->taglist, z->taglen, tagactions,
1477 tagactionssize, z->type, repinfo, z->override_tree, &tag,
1480 if((lzt == local_zone_inform || lzt == local_zone_inform_deny)
1482 lz_inform_print(z, qinfo, repinfo);
1484 if(lzt != local_zone_always_refuse && lzt != local_zone_always_transparent
1485 && lzt != local_zone_always_nxdomain
1486 && local_data_answer(z, qinfo, edns, buf, temp, labs, &ld, lzt,
1487 tag, tag_datas, tag_datas_size, tagname, num_tags)) {
1488 lock_rw_unlock(&z->lock);
1491 r = lz_zone_answer(z, qinfo, edns, buf, temp, ld, lzt);
1492 lock_rw_unlock(&z->lock);
1496 const char* local_zone_type2str(enum localzone_type t)
1499 case local_zone_deny: return "deny";
1500 case local_zone_refuse: return "refuse";
1501 case local_zone_redirect: return "redirect";
1502 case local_zone_transparent: return "transparent";
1503 case local_zone_typetransparent: return "typetransparent";
1504 case local_zone_static: return "static";
1505 case local_zone_nodefault: return "nodefault";
1506 case local_zone_inform: return "inform";
1507 case local_zone_inform_deny: return "inform_deny";
1508 case local_zone_always_transparent: return "always_transparent";
1509 case local_zone_always_refuse: return "always_refuse";
1510 case local_zone_always_nxdomain: return "always_nxdomain";
1515 int local_zone_str2type(const char* type, enum localzone_type* t)
1517 if(strcmp(type, "deny") == 0)
1518 *t = local_zone_deny;
1519 else if(strcmp(type, "refuse") == 0)
1520 *t = local_zone_refuse;
1521 else if(strcmp(type, "static") == 0)
1522 *t = local_zone_static;
1523 else if(strcmp(type, "transparent") == 0)
1524 *t = local_zone_transparent;
1525 else if(strcmp(type, "typetransparent") == 0)
1526 *t = local_zone_typetransparent;
1527 else if(strcmp(type, "redirect") == 0)
1528 *t = local_zone_redirect;
1529 else if(strcmp(type, "inform") == 0)
1530 *t = local_zone_inform;
1531 else if(strcmp(type, "inform_deny") == 0)
1532 *t = local_zone_inform_deny;
1533 else if(strcmp(type, "always_transparent") == 0)
1534 *t = local_zone_always_transparent;
1535 else if(strcmp(type, "always_refuse") == 0)
1536 *t = local_zone_always_refuse;
1537 else if(strcmp(type, "always_nxdomain") == 0)
1538 *t = local_zone_always_nxdomain;
1543 /** iterate over the kiddies of the given name and set their parent ptr */
1545 set_kiddo_parents(struct local_zone* z, struct local_zone* match,
1546 struct local_zone* newp)
1548 /* both zones and z are locked already */
1549 /* in the sorted rbtree, the kiddies of z are located after z */
1550 /* z must be present in the tree */
1551 struct local_zone* p = z;
1552 p = (struct local_zone*)rbtree_next(&p->node);
1553 while(p!=(struct local_zone*)RBTREE_NULL &&
1554 p->dclass == z->dclass && dname_strict_subdomain(p->name,
1555 p->namelabs, z->name, z->namelabs)) {
1556 /* update parent ptr */
1557 /* only when matches with existing parent pointer, so that
1558 * deeper child structures are not touched, i.e.
1559 * update of x, and a.x, b.x, f.b.x, g.b.x, c.x, y
1560 * gets to update a.x, b.x and c.x */
1561 lock_rw_wrlock(&p->lock);
1562 if(p->parent == match)
1564 lock_rw_unlock(&p->lock);
1565 p = (struct local_zone*)rbtree_next(&p->node);
1569 struct local_zone* local_zones_add_zone(struct local_zones* zones,
1570 uint8_t* name, size_t len, int labs, uint16_t dclass,
1571 enum localzone_type tp)
1574 struct local_zone* z = local_zone_create(name, len, labs, tp, dclass);
1579 lock_rw_wrlock(&z->lock);
1581 /* find the closest parent */
1582 z->parent = local_zones_find(zones, name, len, labs, dclass);
1584 /* insert into the tree */
1585 if(!rbtree_insert(&zones->ztree, &z->node)) {
1586 /* duplicate entry! */
1587 lock_rw_unlock(&z->lock);
1588 local_zone_delete(z);
1589 log_err("internal: duplicate entry in local_zones_add_zone");
1593 /* set parent pointers right */
1594 set_kiddo_parents(z, z->parent, z);
1596 lock_rw_unlock(&z->lock);
1600 void local_zones_del_zone(struct local_zones* zones, struct local_zone* z)
1602 /* fix up parents in tree */
1603 lock_rw_wrlock(&z->lock);
1604 set_kiddo_parents(z, z, z->parent);
1606 /* remove from tree */
1607 (void)rbtree_delete(&zones->ztree, z);
1609 /* delete the zone */
1610 lock_rw_unlock(&z->lock);
1611 local_zone_delete(z);
1615 local_zones_add_RR(struct local_zones* zones, const char* rr)
1621 struct local_zone* z;
1623 if(!get_rr_nameclass(rr, &rr_name, &rr_class)) {
1626 labs = dname_count_size_labels(rr_name, &len);
1627 /* could first try readlock then get writelock if zone does not exist,
1628 * but we do not add enough RRs (from multiple threads) to optimize */
1629 lock_rw_wrlock(&zones->lock);
1630 z = local_zones_lookup(zones, rr_name, len, labs, rr_class);
1632 z = local_zones_add_zone(zones, rr_name, len, labs, rr_class,
1633 local_zone_transparent);
1635 lock_rw_unlock(&zones->lock);
1641 lock_rw_wrlock(&z->lock);
1642 lock_rw_unlock(&zones->lock);
1643 r = lz_enter_rr_into_zone(z, rr);
1644 lock_rw_unlock(&z->lock);
1648 /** returns true if the node is terminal so no deeper domain names exist */
1650 is_terminal(struct local_data* d)
1652 /* for empty nonterminals, the deeper domain names are sorted
1653 * right after them, so simply check the next name in the tree
1655 struct local_data* n = (struct local_data*)rbtree_next(&d->node);
1656 if(n == (struct local_data*)RBTREE_NULL)
1657 return 1; /* last in tree, no deeper node */
1658 if(dname_strict_subdomain(n->name, n->namelabs, d->name, d->namelabs))
1659 return 0; /* there is a deeper node */
1663 /** delete empty terminals from tree when final data is deleted */
1665 del_empty_term(struct local_zone* z, struct local_data* d,
1666 uint8_t* name, size_t len, int labs)
1668 while(d && d->rrsets == NULL && is_terminal(d)) {
1669 /* is this empty nonterminal? delete */
1670 /* note, no memory recycling in zone region */
1671 (void)rbtree_delete(&z->data, d);
1673 /* go up and to the next label */
1674 if(dname_is_root(name))
1676 dname_remove_label(&name, &len);
1678 d = lz_find_node(z, name, len, labs);
1682 void local_zones_del_data(struct local_zones* zones,
1683 uint8_t* name, size_t len, int labs, uint16_t dclass)
1686 struct local_zone* z;
1687 struct local_data* d;
1688 lock_rw_rdlock(&zones->lock);
1689 z = local_zones_lookup(zones, name, len, labs, dclass);
1691 /* no such zone, we're done */
1692 lock_rw_unlock(&zones->lock);
1695 lock_rw_wrlock(&z->lock);
1696 lock_rw_unlock(&zones->lock);
1698 /* find the domain */
1699 d = lz_find_node(z, name, len, labs);
1701 /* no memory recycling for zone deletions ... */
1703 /* did we delete the soa record ? */
1704 if(query_dname_compare(d->name, z->name) == 0)
1707 /* cleanup the empty nonterminals for this name */
1708 del_empty_term(z, d, name, len, labs);
1711 lock_rw_unlock(&z->lock);