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"
55 #include "util/config_file.h"
57 /* maximum RRs in an RRset, to cap possible 'endless' list RRs.
58 * with 16 bytes for an A record, a 64K packet has about 4000 max */
59 #define LOCALZONE_RRSET_COUNT_MAX 4096
62 local_zones_create(void)
64 struct local_zones* zones = (struct local_zones*)calloc(1,
68 rbtree_init(&zones->ztree, &local_zone_cmp);
69 lock_rw_init(&zones->lock);
70 lock_protect(&zones->lock, &zones->ztree, sizeof(zones->ztree));
71 /* also lock protects the rbnode's in struct local_zone */
75 /** helper traverse to delete zones */
77 lzdel(rbnode_type* n, void* ATTR_UNUSED(arg))
79 struct local_zone* z = (struct local_zone*)n->key;
84 local_zones_delete(struct local_zones* zones)
88 lock_rw_destroy(&zones->lock);
89 /* walk through zones and delete them all */
90 traverse_postorder(&zones->ztree, lzdel, NULL);
95 local_zone_delete(struct local_zone* z)
99 lock_rw_destroy(&z->lock);
100 regional_destroy(z->region);
107 local_zone_cmp(const void* z1, const void* z2)
109 /* first sort on class, so that hierarchy can be maintained within
111 struct local_zone* a = (struct local_zone*)z1;
112 struct local_zone* b = (struct local_zone*)z2;
114 if(a->dclass != b->dclass) {
115 if(a->dclass < b->dclass)
119 return dname_lab_cmp(a->name, a->namelabs, b->name, b->namelabs, &m);
123 local_data_cmp(const void* d1, const void* d2)
125 struct local_data* a = (struct local_data*)d1;
126 struct local_data* b = (struct local_data*)d2;
128 return dname_canon_lab_cmp(a->name, a->namelabs, b->name,
132 /* form wireformat from text format domain name */
134 parse_dname(const char* str, uint8_t** res, size_t* len, int* labs)
136 *res = sldns_str2wire_dname(str, len);
139 log_err("cannot parse name %s", str);
142 *labs = dname_count_size_labels(*res, len);
146 /** create a new localzone */
147 static struct local_zone*
148 local_zone_create(uint8_t* nm, size_t len, int labs,
149 enum localzone_type t, uint16_t dclass)
151 struct local_zone* z = (struct local_zone*)calloc(1, sizeof(*z));
161 lock_rw_init(&z->lock);
162 z->region = regional_create_custom(sizeof(struct regional));
167 rbtree_init(&z->data, &local_data_cmp);
168 lock_protect(&z->lock, &z->parent, sizeof(*z)-sizeof(rbnode_type));
169 /* also the zones->lock protects node, parent, name*, class */
173 /** enter a new zone with allocated dname returns with WRlock */
174 static struct local_zone*
175 lz_enter_zone_dname(struct local_zones* zones, uint8_t* nm, size_t len,
176 int labs, enum localzone_type t, uint16_t c)
178 struct local_zone* z = local_zone_create(nm, len, labs, t, c);
181 log_err("out of memory");
186 lock_rw_wrlock(&zones->lock);
187 lock_rw_wrlock(&z->lock);
188 if(!rbtree_insert(&zones->ztree, &z->node)) {
189 struct local_zone* oldz;
190 log_warn("duplicate local-zone");
191 lock_rw_unlock(&z->lock);
192 /* save zone name locally before deallocation,
193 * otherwise, nm is gone if we zone_delete now. */
195 /* find the correct zone, so not an error for duplicate */
196 z = local_zones_find(zones, nm, len, labs, c);
197 lock_rw_wrlock(&z->lock);
198 lock_rw_unlock(&zones->lock);
199 local_zone_delete(oldz);
202 lock_rw_unlock(&zones->lock);
206 /** enter a new zone */
207 static struct local_zone*
208 lz_enter_zone(struct local_zones* zones, const char* name, const char* type,
211 struct local_zone* z;
212 enum localzone_type t;
216 if(!parse_dname(name, &nm, &len, &labs)) {
217 log_err("bad zone name %s %s", name, type);
220 if(!local_zone_str2type(type, &t)) {
221 log_err("bad lz_enter_zone type %s %s", name, type);
225 if(!(z=lz_enter_zone_dname(zones, nm, len, labs, t, dclass))) {
226 log_err("could not enter zone %s %s", name, type);
233 rrstr_get_rr_content(const char* str, uint8_t** nm, uint16_t* type,
234 uint16_t* dclass, time_t* ttl, uint8_t* rr, size_t len,
235 uint8_t** rdata, size_t* rdata_len)
237 size_t dname_len = 0;
238 int e = sldns_str2wire_rr_buf(str, rr, &len, &dname_len, 3600,
241 log_err("error parsing local-data at %d: '%s': %s",
242 LDNS_WIREPARSE_OFFSET(e), str,
243 sldns_get_errorstr_parse(e));
246 *nm = memdup(rr, dname_len);
248 log_err("out of memory");
251 *dclass = sldns_wirerr_get_class(rr, len, dname_len);
252 *type = sldns_wirerr_get_type(rr, len, dname_len);
253 *ttl = (time_t)sldns_wirerr_get_ttl(rr, len, dname_len);
254 *rdata = sldns_wirerr_get_rdatawl(rr, len, dname_len);
255 *rdata_len = sldns_wirerr_get_rdatalen(rr, len, dname_len)+2;
259 /** return name and class of rr; parses string */
261 get_rr_nameclass(const char* str, uint8_t** nm, uint16_t* dclass)
263 uint8_t rr[LDNS_RR_BUF_SIZE];
264 size_t len = sizeof(rr), dname_len = 0;
265 int s = sldns_str2wire_rr_buf(str, rr, &len, &dname_len, 3600,
268 log_err("error parsing local-data at %d '%s': %s",
269 LDNS_WIREPARSE_OFFSET(s), str,
270 sldns_get_errorstr_parse(s));
273 *nm = memdup(rr, dname_len);
274 *dclass = sldns_wirerr_get_class(rr, len, dname_len);
276 log_err("out of memory");
283 * Find an rrset in local data structure.
284 * @param data: local data domain name structure.
285 * @param type: type to look for (host order).
286 * @param alias_ok: 1 if matching a non-exact, alias type such as CNAME is
287 * allowed. otherwise 0.
288 * @return rrset pointer or NULL if not found.
290 static struct local_rrset*
291 local_data_find_type(struct local_data* data, uint16_t type, int alias_ok)
293 struct local_rrset* p;
295 for(p = data->rrsets; p; p = p->next) {
296 if(p->rrset->rk.type == type)
298 if(alias_ok && p->rrset->rk.type == htons(LDNS_RR_TYPE_CNAME))
304 /** check for RR duplicates */
306 rr_is_duplicate(struct packed_rrset_data* pd, uint8_t* rdata, size_t rdata_len)
309 for(i=0; i<pd->count; i++) {
310 if(pd->rr_len[i] == rdata_len &&
311 memcmp(pd->rr_data[i], rdata, rdata_len) == 0)
317 /** new local_rrset */
318 static struct local_rrset*
319 new_local_rrset(struct regional* region, struct local_data* node,
320 uint16_t rrtype, uint16_t rrclass)
322 struct packed_rrset_data* pd;
323 struct local_rrset* rrset = (struct local_rrset*)
324 regional_alloc_zero(region, sizeof(*rrset));
326 log_err("out of memory");
329 rrset->next = node->rrsets;
330 node->rrsets = rrset;
331 rrset->rrset = (struct ub_packed_rrset_key*)
332 regional_alloc_zero(region, sizeof(*rrset->rrset));
334 log_err("out of memory");
337 rrset->rrset->entry.key = rrset->rrset;
338 pd = (struct packed_rrset_data*)regional_alloc_zero(region,
341 log_err("out of memory");
344 pd->trust = rrset_trust_prim_noglue;
345 pd->security = sec_status_insecure;
346 rrset->rrset->entry.data = pd;
347 rrset->rrset->rk.dname = node->name;
348 rrset->rrset->rk.dname_len = node->namelen;
349 rrset->rrset->rk.type = htons(rrtype);
350 rrset->rrset->rk.rrset_class = htons(rrclass);
354 /** insert RR into RRset data structure; Wastes a couple of bytes */
356 rrset_insert_rr(struct regional* region, struct packed_rrset_data* pd,
357 uint8_t* rdata, size_t rdata_len, time_t ttl, const char* rrstr)
359 size_t* oldlen = pd->rr_len;
360 time_t* oldttl = pd->rr_ttl;
361 uint8_t** olddata = pd->rr_data;
363 /* add RR to rrset */
364 if(pd->count > LOCALZONE_RRSET_COUNT_MAX) {
365 log_warn("RRset '%s' has more than %d records, record ignored",
366 rrstr, LOCALZONE_RRSET_COUNT_MAX);
370 pd->rr_len = regional_alloc(region, sizeof(*pd->rr_len)*pd->count);
371 pd->rr_ttl = regional_alloc(region, sizeof(*pd->rr_ttl)*pd->count);
372 pd->rr_data = regional_alloc(region, sizeof(*pd->rr_data)*pd->count);
373 if(!pd->rr_len || !pd->rr_ttl || !pd->rr_data) {
374 log_err("out of memory");
378 memcpy(pd->rr_len+1, oldlen,
379 sizeof(*pd->rr_len)*(pd->count-1));
380 memcpy(pd->rr_ttl+1, oldttl,
381 sizeof(*pd->rr_ttl)*(pd->count-1));
382 memcpy(pd->rr_data+1, olddata,
383 sizeof(*pd->rr_data)*(pd->count-1));
385 pd->rr_len[0] = rdata_len;
387 pd->rr_data[0] = regional_alloc_init(region, rdata, rdata_len);
388 if(!pd->rr_data[0]) {
389 log_err("out of memory");
395 /** find a data node by exact name */
396 static struct local_data*
397 lz_find_node(struct local_zone* z, uint8_t* nm, size_t nmlen, int nmlabs)
399 struct local_data key;
403 key.namelabs = nmlabs;
404 return (struct local_data*)rbtree_search(&z->data, &key.node);
407 /** find a node, create it if not and all its empty nonterminal parents */
409 lz_find_create_node(struct local_zone* z, uint8_t* nm, size_t nmlen,
410 int nmlabs, struct local_data** res)
412 struct local_data* ld = lz_find_node(z, nm, nmlen, nmlabs);
414 /* create a domain name to store rr. */
415 ld = (struct local_data*)regional_alloc_zero(z->region,
418 log_err("out of memory adding local data");
422 ld->name = regional_alloc_init(z->region, nm, nmlen);
424 log_err("out of memory");
428 ld->namelabs = nmlabs;
429 if(!rbtree_insert(&z->data, &ld->node)) {
430 log_assert(0); /* duplicate name */
432 /* see if empty nonterminals need to be created */
433 if(nmlabs > z->namelabs) {
434 dname_remove_label(&nm, &nmlen);
435 if(!lz_find_create_node(z, nm, nmlen, nmlabs-1, res))
443 /** enter data RR into auth zone */
445 lz_enter_rr_into_zone(struct local_zone* z, const char* rrstr)
450 struct local_data* node;
451 struct local_rrset* rrset;
452 struct packed_rrset_data* pd;
453 uint16_t rrtype = 0, rrclass = 0;
455 uint8_t rr[LDNS_RR_BUF_SIZE];
458 if(!rrstr_get_rr_content(rrstr, &nm, &rrtype, &rrclass, &ttl, rr,
459 sizeof(rr), &rdata, &rdata_len)) {
460 log_err("bad local-data: %s", rrstr);
463 log_assert(z->dclass == rrclass);
464 if(z->type == local_zone_redirect &&
465 query_dname_compare(z->name, nm) != 0) {
466 log_err("local-data in redirect zone must reside at top of zone"
467 ", not at %s", rrstr);
471 nmlabs = dname_count_size_labels(nm, &nmlen);
472 if(!lz_find_create_node(z, nm, nmlen, nmlabs, &node)) {
479 /* Reject it if we would end up having CNAME and other data (including
480 * another CNAME) for a redirect zone. */
481 if(z->type == local_zone_redirect && node->rrsets) {
482 const char* othertype = NULL;
483 if (rrtype == LDNS_RR_TYPE_CNAME)
485 else if (node->rrsets->rrset->rk.type ==
486 htons(LDNS_RR_TYPE_CNAME)) {
490 log_err("local-data '%s' in redirect zone must not "
491 "coexist with %s local-data", rrstr, othertype);
495 rrset = local_data_find_type(node, rrtype, 0);
497 rrset = new_local_rrset(z->region, node, rrtype, rrclass);
500 if(query_dname_compare(node->name, z->name) == 0) {
501 if(rrtype == LDNS_RR_TYPE_NSEC)
502 rrset->rrset->rk.flags = PACKED_RRSET_NSEC_AT_APEX;
503 if(rrtype == LDNS_RR_TYPE_SOA)
504 z->soa = rrset->rrset;
507 pd = (struct packed_rrset_data*)rrset->rrset->entry.data;
508 log_assert(rrset && pd);
510 /* check for duplicate RR */
511 if(rr_is_duplicate(pd, rdata, rdata_len)) {
512 verbose(VERB_ALGO, "ignoring duplicate RR: %s", rrstr);
515 return rrset_insert_rr(z->region, pd, rdata, rdata_len, ttl, rrstr);
518 /** enter a data RR into auth data; a zone for it must exist */
520 lz_enter_rr_str(struct local_zones* zones, const char* rr)
526 struct local_zone* z;
528 if(!get_rr_nameclass(rr, &rr_name, &rr_class)) {
529 log_err("bad rr %s", rr);
532 labs = dname_count_size_labels(rr_name, &len);
533 lock_rw_rdlock(&zones->lock);
534 z = local_zones_lookup(zones, rr_name, len, labs, rr_class);
536 lock_rw_unlock(&zones->lock);
537 fatal_exit("internal error: no zone for rr %s", rr);
539 lock_rw_wrlock(&z->lock);
540 lock_rw_unlock(&zones->lock);
542 r = lz_enter_rr_into_zone(z, rr);
543 lock_rw_unlock(&z->lock);
547 /** enter tagstring into zone */
549 lz_enter_zone_tag(struct local_zones* zones, char* zname, uint8_t* list,
550 size_t len, uint16_t rr_class)
552 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
553 size_t dname_len = sizeof(dname);
554 int dname_labs, r = 0;
555 struct local_zone* z;
557 if(sldns_str2wire_dname_buf(zname, dname, &dname_len) != 0) {
558 log_err("cannot parse zone name in local-zone-tag: %s", zname);
561 dname_labs = dname_count_labels(dname);
563 lock_rw_rdlock(&zones->lock);
564 z = local_zones_find(zones, dname, dname_len, dname_labs, rr_class);
566 lock_rw_unlock(&zones->lock);
567 log_err("no local-zone for tag %s", zname);
570 lock_rw_wrlock(&z->lock);
571 lock_rw_unlock(&zones->lock);
573 z->taglist = memdup(list, len);
577 lock_rw_unlock(&z->lock);
581 /** enter override into zone */
583 lz_enter_override(struct local_zones* zones, char* zname, char* netblock,
584 char* type, uint16_t rr_class)
586 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
587 size_t dname_len = sizeof(dname);
589 struct sockaddr_storage addr;
592 struct local_zone* z;
593 enum localzone_type t;
595 /* parse zone name */
596 if(sldns_str2wire_dname_buf(zname, dname, &dname_len) != 0) {
597 log_err("cannot parse zone name in local-zone-override: %s %s",
601 dname_labs = dname_count_labels(dname);
604 if(!netblockstrtoaddr(netblock, UNBOUND_DNS_PORT, &addr, &addrlen,
606 log_err("cannot parse netblock in local-zone-override: %s %s",
611 /* parse zone type */
612 if(!local_zone_str2type(type, &t)) {
613 log_err("cannot parse type in local-zone-override: %s %s %s",
614 zname, netblock, type);
618 /* find localzone entry */
619 lock_rw_rdlock(&zones->lock);
620 z = local_zones_find(zones, dname, dname_len, dname_labs, rr_class);
622 lock_rw_unlock(&zones->lock);
623 log_err("no local-zone for local-zone-override %s", zname);
626 lock_rw_wrlock(&z->lock);
627 lock_rw_unlock(&zones->lock);
629 /* create netblock addr_tree if not present yet */
630 if(!z->override_tree) {
631 z->override_tree = (struct rbtree_type*)regional_alloc_zero(
632 z->region, sizeof(*z->override_tree));
633 if(!z->override_tree) {
634 lock_rw_unlock(&z->lock);
635 log_err("out of memory");
638 addr_tree_init(z->override_tree);
640 /* add new elem to tree */
641 if(z->override_tree) {
642 struct local_zone_override* n;
643 n = (struct local_zone_override*)regional_alloc_zero(
644 z->region, sizeof(*n));
646 lock_rw_unlock(&z->lock);
647 log_err("out of memory");
651 if(!addr_tree_insert(z->override_tree,
652 (struct addr_tree_node*)n, &addr, addrlen, net)) {
653 lock_rw_unlock(&z->lock);
654 log_err("duplicate local-zone-override %s %s",
660 lock_rw_unlock(&z->lock);
664 /** parse local-zone: statements */
666 lz_enter_zones(struct local_zones* zones, struct config_file* cfg)
668 struct config_str2list* p;
669 struct local_zone* z;
670 for(p = cfg->local_zones; p; p = p->next) {
671 if(!(z=lz_enter_zone(zones, p->str, p->str2,
674 lock_rw_unlock(&z->lock);
679 /** lookup a zone in rbtree; exact match only; SLOW due to parse */
681 lz_exists(struct local_zones* zones, const char* name)
685 z.dclass = LDNS_RR_CLASS_IN;
686 if(!parse_dname(name, &z.name, &z.namelen, &z.namelabs)) {
687 log_err("bad name %s", name);
690 lock_rw_rdlock(&zones->lock);
691 if(rbtree_search(&zones->ztree, &z.node)) {
692 lock_rw_unlock(&zones->lock);
696 lock_rw_unlock(&zones->lock);
701 /** lookup a zone in cfg->nodefault list */
703 lz_nodefault(struct config_file* cfg, const char* name)
705 struct config_strlist* p;
706 size_t len = strlen(name);
707 if(len == 0) return 0;
708 if(name[len-1] == '.') len--;
710 for(p = cfg->local_zones_nodefault; p; p = p->next) {
711 /* compare zone name, lowercase, compare without ending . */
712 if(strncasecmp(p->str, name, len) == 0 &&
713 (strlen(p->str) == len || (strlen(p->str)==len+1 &&
714 p->str[len] == '.')))
720 /** enter AS112 default zone */
722 add_as112_default(struct local_zones* zones, struct config_file* cfg,
725 struct local_zone* z;
726 char str[1024]; /* known long enough */
727 if(lz_exists(zones, name) || lz_nodefault(cfg, name))
728 return 1; /* do not enter default content */
729 if(!(z=lz_enter_zone(zones, name, "static", LDNS_RR_CLASS_IN)))
731 snprintf(str, sizeof(str), "%s 10800 IN SOA localhost. "
732 "nobody.invalid. 1 3600 1200 604800 10800", name);
733 if(!lz_enter_rr_into_zone(z, str)) {
734 lock_rw_unlock(&z->lock);
737 snprintf(str, sizeof(str), "%s 10800 IN NS localhost. ", name);
738 if(!lz_enter_rr_into_zone(z, str)) {
739 lock_rw_unlock(&z->lock);
742 lock_rw_unlock(&z->lock);
746 /** enter default zones */
748 lz_enter_defaults(struct local_zones* zones, struct config_file* cfg)
750 struct local_zone* z;
753 /* this list of zones is from RFC 6303 and RFC 7686 */
755 /* block localhost level zones first, then onion and later the LAN zones */
757 /* localhost. zone */
758 if(!lz_exists(zones, "localhost.") &&
759 !lz_nodefault(cfg, "localhost.")) {
760 if(!(z=lz_enter_zone(zones, "localhost.", "static",
761 LDNS_RR_CLASS_IN)) ||
762 !lz_enter_rr_into_zone(z,
763 "localhost. 10800 IN NS localhost.") ||
764 !lz_enter_rr_into_zone(z,
765 "localhost. 10800 IN SOA localhost. nobody.invalid. "
766 "1 3600 1200 604800 10800") ||
767 !lz_enter_rr_into_zone(z,
768 "localhost. 10800 IN A 127.0.0.1") ||
769 !lz_enter_rr_into_zone(z,
770 "localhost. 10800 IN AAAA ::1")) {
771 log_err("out of memory adding default zone");
772 if(z) { lock_rw_unlock(&z->lock); }
775 lock_rw_unlock(&z->lock);
777 /* reverse ip4 zone */
778 if(!lz_exists(zones, "127.in-addr.arpa.") &&
779 !lz_nodefault(cfg, "127.in-addr.arpa.")) {
780 if(!(z=lz_enter_zone(zones, "127.in-addr.arpa.", "static",
781 LDNS_RR_CLASS_IN)) ||
782 !lz_enter_rr_into_zone(z,
783 "127.in-addr.arpa. 10800 IN NS localhost.") ||
784 !lz_enter_rr_into_zone(z,
785 "127.in-addr.arpa. 10800 IN SOA localhost. "
786 "nobody.invalid. 1 3600 1200 604800 10800") ||
787 !lz_enter_rr_into_zone(z,
788 "1.0.0.127.in-addr.arpa. 10800 IN PTR localhost.")) {
789 log_err("out of memory adding default zone");
790 if(z) { lock_rw_unlock(&z->lock); }
793 lock_rw_unlock(&z->lock);
795 /* reverse ip6 zone */
796 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.") &&
797 !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.")) {
798 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",
799 LDNS_RR_CLASS_IN)) ||
800 !lz_enter_rr_into_zone(z,
801 "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.") ||
802 !lz_enter_rr_into_zone(z,
803 "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. "
804 "nobody.invalid. 1 3600 1200 604800 10800") ||
805 !lz_enter_rr_into_zone(z,
806 "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.")) {
807 log_err("out of memory adding default zone");
808 if(z) { lock_rw_unlock(&z->lock); }
811 lock_rw_unlock(&z->lock);
813 /* onion. zone (RFC 7686) */
814 if(!lz_exists(zones, "onion.") &&
815 !lz_nodefault(cfg, "onion.")) {
816 if(!(z=lz_enter_zone(zones, "onion.", "static",
817 LDNS_RR_CLASS_IN)) ||
818 !lz_enter_rr_into_zone(z,
819 "onion. 10800 IN NS localhost.") ||
820 !lz_enter_rr_into_zone(z,
821 "onion. 10800 IN SOA localhost. nobody.invalid. "
822 "1 3600 1200 604800 10800")) {
823 log_err("out of memory adding default zone");
824 if(z) { lock_rw_unlock(&z->lock); }
827 lock_rw_unlock(&z->lock);
830 /* block AS112 zones, unless asked not to */
831 if(!cfg->unblock_lan_zones) {
832 for(zstr = as112_zones; *zstr; zstr++) {
833 if(!add_as112_default(zones, cfg, *zstr)) {
834 log_err("out of memory adding default zone");
842 /** parse local-zone-override: statements */
844 lz_enter_overrides(struct local_zones* zones, struct config_file* cfg)
846 struct config_str3list* p;
847 for(p = cfg->local_zone_overrides; p; p = p->next) {
848 if(!lz_enter_override(zones, p->str, p->str2, p->str3,
855 /** setup parent pointers, so that a lookup can be done for closest match */
857 init_parents(struct local_zones* zones)
859 struct local_zone* node, *prev = NULL, *p;
861 lock_rw_wrlock(&zones->lock);
862 RBTREE_FOR(node, struct local_zone*, &zones->ztree) {
863 lock_rw_wrlock(&node->lock);
865 if(!prev || prev->dclass != node->dclass) {
867 lock_rw_unlock(&node->lock);
870 (void)dname_lab_cmp(prev->name, prev->namelabs, node->name,
871 node->namelabs, &m); /* we know prev is smaller */
872 /* sort order like: . com. bla.com. zwb.com. net. */
873 /* find the previous, or parent-parent-parent */
874 for(p = prev; p; p = p->parent)
875 /* looking for name with few labels, a parent */
876 if(p->namelabs <= m) {
877 /* ==: since prev matched m, this is closest*/
878 /* <: prev matches more, but is not a parent,
879 * this one is a (grand)parent */
885 if(node->override_tree)
886 addr_tree_init_parents(node->override_tree);
887 lock_rw_unlock(&node->lock);
889 lock_rw_unlock(&zones->lock);
892 /** enter implicit transparent zone for local-data: without local-zone: */
894 lz_setup_implicit(struct local_zones* zones, struct config_file* cfg)
896 /* walk over all items that have no parent zone and find
897 * the name that covers them all (could be the root) and
898 * add that as a transparent zone */
899 struct config_strlist* p;
901 int have_other_classes = 0;
906 int match = 0; /* number of labels match count */
908 init_parents(zones); /* to enable local_zones_lookup() */
909 for(p = cfg->local_data; p; p = p->next) {
914 if(!get_rr_nameclass(p->str, &rr_name, &rr_class)) {
915 log_err("Bad local-data RR %s", p->str);
918 labs = dname_count_size_labels(rr_name, &len);
919 lock_rw_rdlock(&zones->lock);
920 if(!local_zones_lookup(zones, rr_name, len, labs, rr_class)) {
930 if(rr_class != dclass) {
931 /* process other classes later */
933 have_other_classes = 1;
934 lock_rw_unlock(&zones->lock);
937 /* find smallest shared topdomain */
938 (void)dname_lab_cmp(nm, nmlabs,
944 } else free(rr_name);
945 lock_rw_unlock(&zones->lock);
949 struct local_zone* z;
950 /* allocate zone of smallest shared topdomain to contain em */
952 dname_remove_labels(&n2, &nmlen, nmlabs - match);
953 n2 = memdup(n2, nmlen);
956 log_err("out of memory");
959 log_nametypeclass(VERB_ALGO, "implicit transparent local-zone",
961 if(!(z=lz_enter_zone_dname(zones, n2, nmlen, match,
962 local_zone_transparent, dclass))) {
965 lock_rw_unlock(&z->lock);
967 if(have_other_classes) {
968 /* restart to setup other class */
969 return lz_setup_implicit(zones, cfg);
974 /** enter local-zone-tag info */
976 lz_enter_zone_tags(struct local_zones* zones, struct config_file* cfg)
978 struct config_strbytelist* p;
980 for(p = cfg->local_zone_tags; p; p = p->next) {
981 if(!lz_enter_zone_tag(zones, p->str, p->str2, p->str2len,
986 if(c) verbose(VERB_ALGO, "applied tags to %d local zones", c);
990 /** enter auth data */
992 lz_enter_data(struct local_zones* zones, struct config_file* cfg)
994 struct config_strlist* p;
995 for(p = cfg->local_data; p; p = p->next) {
996 if(!lz_enter_rr_str(zones, p->str))
1002 /** free memory from config */
1004 lz_freeup_cfg(struct config_file* cfg)
1006 config_deldblstrlist(cfg->local_zones);
1007 cfg->local_zones = NULL;
1008 config_delstrlist(cfg->local_zones_nodefault);
1009 cfg->local_zones_nodefault = NULL;
1010 config_delstrlist(cfg->local_data);
1011 cfg->local_data = NULL;
1015 local_zones_apply_cfg(struct local_zones* zones, struct config_file* cfg)
1017 /* create zones from zone statements. */
1018 if(!lz_enter_zones(zones, cfg)) {
1021 /* apply default zones+content (unless disabled, or overridden) */
1022 if(!lz_enter_defaults(zones, cfg)) {
1025 /* enter local zone overrides */
1026 if(!lz_enter_overrides(zones, cfg)) {
1029 /* create implicit transparent zone from data. */
1030 if(!lz_setup_implicit(zones, cfg)) {
1034 /* setup parent ptrs for lookup during data entry */
1035 init_parents(zones);
1036 /* insert local zone tags */
1037 if(!lz_enter_zone_tags(zones, cfg)) {
1040 /* insert local data */
1041 if(!lz_enter_data(zones, cfg)) {
1044 /* freeup memory from cfg struct. */
1050 local_zones_lookup(struct local_zones* zones,
1051 uint8_t* name, size_t len, int labs, uint16_t dclass)
1053 return local_zones_tags_lookup(zones, name, len, labs,
1054 dclass, NULL, 0, 1);
1058 local_zones_tags_lookup(struct local_zones* zones,
1059 uint8_t* name, size_t len, int labs, uint16_t dclass,
1060 uint8_t* taglist, size_t taglen, int ignoretags)
1062 rbnode_type* res = NULL;
1063 struct local_zone *result;
1064 struct local_zone key;
1066 key.node.key = &key;
1067 key.dclass = dclass;
1070 key.namelabs = labs;
1071 rbtree_find_less_equal(&zones->ztree, &key, &res);
1072 result = (struct local_zone*)res;
1073 /* exact or smaller element (or no element) */
1074 if(!result || result->dclass != dclass)
1076 /* count number of labels matched */
1077 (void)dname_lab_cmp(result->name, result->namelabs, key.name,
1079 while(result) { /* go up until qname is zone or subdomain of zone */
1080 if(result->namelabs <= m)
1081 if(ignoretags || !result->taglist ||
1082 taglist_intersect(result->taglist,
1083 result->taglen, taglist, taglen))
1085 result = result->parent;
1091 local_zones_find(struct local_zones* zones,
1092 uint8_t* name, size_t len, int labs, uint16_t dclass)
1094 struct local_zone key;
1095 key.node.key = &key;
1096 key.dclass = dclass;
1099 key.namelabs = labs;
1101 return (struct local_zone*)rbtree_search(&zones->ztree, &key);
1104 /** print all RRsets in local zone */
1106 local_zone_out(struct local_zone* z)
1108 struct local_data* d;
1109 struct local_rrset* p;
1110 RBTREE_FOR(d, struct local_data*, &z->data) {
1111 for(p = d->rrsets; p; p = p->next) {
1112 log_nametypeclass(0, "rrset", d->name,
1113 ntohs(p->rrset->rk.type),
1114 ntohs(p->rrset->rk.rrset_class));
1119 void local_zones_print(struct local_zones* zones)
1121 struct local_zone* z;
1122 lock_rw_rdlock(&zones->lock);
1123 log_info("number of auth zones %u", (unsigned)zones->ztree.count);
1124 RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
1125 lock_rw_rdlock(&z->lock);
1127 case local_zone_deny:
1128 log_nametypeclass(0, "deny zone",
1129 z->name, 0, z->dclass);
1131 case local_zone_refuse:
1132 log_nametypeclass(0, "refuse zone",
1133 z->name, 0, z->dclass);
1135 case local_zone_redirect:
1136 log_nametypeclass(0, "redirect zone",
1137 z->name, 0, z->dclass);
1139 case local_zone_transparent:
1140 log_nametypeclass(0, "transparent zone",
1141 z->name, 0, z->dclass);
1143 case local_zone_typetransparent:
1144 log_nametypeclass(0, "typetransparent zone",
1145 z->name, 0, z->dclass);
1147 case local_zone_static:
1148 log_nametypeclass(0, "static zone",
1149 z->name, 0, z->dclass);
1151 case local_zone_inform:
1152 log_nametypeclass(0, "inform zone",
1153 z->name, 0, z->dclass);
1155 case local_zone_inform_deny:
1156 log_nametypeclass(0, "inform_deny zone",
1157 z->name, 0, z->dclass);
1159 case local_zone_always_transparent:
1160 log_nametypeclass(0, "always_transparent zone",
1161 z->name, 0, z->dclass);
1163 case local_zone_always_refuse:
1164 log_nametypeclass(0, "always_refuse zone",
1165 z->name, 0, z->dclass);
1167 case local_zone_always_nxdomain:
1168 log_nametypeclass(0, "always_nxdomain zone",
1169 z->name, 0, z->dclass);
1172 log_nametypeclass(0, "badtyped zone",
1173 z->name, 0, z->dclass);
1177 lock_rw_unlock(&z->lock);
1179 lock_rw_unlock(&zones->lock);
1182 /** encode answer consisting of 1 rrset */
1184 local_encode(struct query_info* qinfo, struct module_env* env,
1185 struct edns_data* edns, sldns_buffer* buf, struct regional* temp,
1186 struct ub_packed_rrset_key* rrset, int ansec, int rcode)
1188 struct reply_info rep;
1190 /* make answer with time=0 for fixed TTL values */
1191 memset(&rep, 0, sizeof(rep));
1192 rep.flags = (uint16_t)((BIT_QR | BIT_AA | BIT_RA) | rcode);
1195 rep.an_numrrsets = 1;
1196 else rep.ns_numrrsets = 1;
1197 rep.rrset_count = 1;
1198 rep.rrsets = &rrset;
1199 udpsize = edns->udp_size;
1200 edns->edns_version = EDNS_ADVERTISED_VERSION;
1201 edns->udp_size = EDNS_ADVERTISED_SIZE;
1202 edns->ext_rcode = 0;
1203 edns->bits &= EDNS_DO;
1204 if(!inplace_cb_reply_local_call(env, qinfo, NULL, &rep, rcode, edns, temp)
1205 || !reply_info_answer_encode(qinfo, &rep,
1206 *(uint16_t*)sldns_buffer_begin(buf),
1207 sldns_buffer_read_u16_at(buf, 2),
1208 buf, 0, 0, temp, udpsize, edns,
1209 (int)(edns->bits&EDNS_DO), 0))
1210 error_encode(buf, (LDNS_RCODE_SERVFAIL|BIT_AA), qinfo,
1211 *(uint16_t*)sldns_buffer_begin(buf),
1212 sldns_buffer_read_u16_at(buf, 2), edns);
1216 /** encode local error answer */
1218 local_error_encode(struct query_info* qinfo, struct module_env* env,
1219 struct edns_data* edns, sldns_buffer* buf, struct regional* temp,
1222 edns->edns_version = EDNS_ADVERTISED_VERSION;
1223 edns->udp_size = EDNS_ADVERTISED_SIZE;
1224 edns->ext_rcode = 0;
1225 edns->bits &= EDNS_DO;
1227 if(!inplace_cb_reply_local_call(env, qinfo, NULL, NULL,
1229 edns->opt_list = NULL;
1230 error_encode(buf, r, qinfo, *(uint16_t*)sldns_buffer_begin(buf),
1231 sldns_buffer_read_u16_at(buf, 2), edns);
1234 /** find local data tag string match for the given type in the list */
1236 local_data_find_tag_datas(const struct query_info* qinfo,
1237 struct config_strlist* list, struct ub_packed_rrset_key* r,
1238 struct regional* temp)
1240 struct config_strlist* p;
1242 uint8_t rr[LDNS_RR_BUF_SIZE];
1245 struct packed_rrset_data* d;
1246 for(p=list; p; p=p->next) {
1250 /* does this element match the type? */
1251 snprintf(buf, sizeof(buf), ". %s", p->str);
1252 res = sldns_str2wire_rr_buf(buf, rr, &len, NULL, 3600,
1255 /* parse errors are already checked before, in
1256 * acllist check_data, skip this for robustness */
1258 if(len < 1 /* . */ + 8 /* typeclassttl*/ + 2 /*rdatalen*/)
1260 rdr_type = sldns_wirerr_get_type(rr, len, 1);
1261 if(rdr_type != qinfo->qtype && rdr_type != LDNS_RR_TYPE_CNAME)
1264 /* do we have entries already? if not setup key */
1265 if(r->rk.dname == NULL) {
1267 r->rk.dname = qinfo->qname;
1268 r->rk.dname_len = qinfo->qname_len;
1269 r->rk.type = htons(rdr_type);
1270 r->rk.rrset_class = htons(qinfo->qclass);
1272 d = (struct packed_rrset_data*)regional_alloc_zero(
1273 temp, sizeof(struct packed_rrset_data)
1274 + sizeof(size_t) + sizeof(uint8_t*) +
1276 if(!d) return 0; /* out of memory */
1278 d->ttl = sldns_wirerr_get_ttl(rr, len, 1);
1279 d->rr_len = (size_t*)((uint8_t*)d +
1280 sizeof(struct packed_rrset_data));
1281 d->rr_data = (uint8_t**)&(d->rr_len[1]);
1282 d->rr_ttl = (time_t*)&(d->rr_data[1]);
1284 d = (struct packed_rrset_data*)r->entry.data;
1285 /* add entry to the data */
1287 size_t* oldlen = d->rr_len;
1288 uint8_t** olddata = d->rr_data;
1289 time_t* oldttl = d->rr_ttl;
1290 /* increase arrays for lookup */
1291 /* this is of course slow for very many records,
1292 * but most redirects are expected with few records */
1293 d->rr_len = (size_t*)regional_alloc_zero(temp,
1294 (d->count+1)*sizeof(size_t));
1295 d->rr_data = (uint8_t**)regional_alloc_zero(temp,
1296 (d->count+1)*sizeof(uint8_t*));
1297 d->rr_ttl = (time_t*)regional_alloc_zero(temp,
1298 (d->count+1)*sizeof(time_t));
1299 if(!d->rr_len || !d->rr_data || !d->rr_ttl)
1300 return 0; /* out of memory */
1301 /* first one was allocated after struct d, but new
1302 * ones get their own array increment alloc, so
1303 * copy old content */
1304 memmove(d->rr_len, oldlen, d->count*sizeof(size_t));
1305 memmove(d->rr_data, olddata, d->count*sizeof(uint8_t*));
1306 memmove(d->rr_ttl, oldttl, d->count*sizeof(time_t));
1309 d->rr_len[d->count] = sldns_wirerr_get_rdatalen(rr, len, 1)+2;
1310 d->rr_ttl[d->count] = sldns_wirerr_get_ttl(rr, len, 1);
1311 d->rr_data[d->count] = regional_alloc_init(temp,
1312 sldns_wirerr_get_rdatawl(rr, len, 1),
1313 d->rr_len[d->count]);
1314 if(!d->rr_data[d->count])
1315 return 0; /* out of memory */
1324 find_tag_datas(struct query_info* qinfo, struct config_strlist* list,
1325 struct ub_packed_rrset_key* r, struct regional* temp)
1327 int result = local_data_find_tag_datas(qinfo, list, r, temp);
1329 /* If we've found a non-exact alias type of local data, make a shallow
1330 * copy of the RRset and remember it in qinfo to complete the alias
1332 if(result && qinfo->qtype != LDNS_RR_TYPE_CNAME &&
1333 r->rk.type == htons(LDNS_RR_TYPE_CNAME)) {
1334 qinfo->local_alias =
1335 regional_alloc_zero(temp, sizeof(struct local_rrset));
1336 if(!qinfo->local_alias)
1337 return 0; /* out of memory */
1338 qinfo->local_alias->rrset =
1339 regional_alloc_init(temp, r, sizeof(*r));
1340 if(!qinfo->local_alias->rrset)
1341 return 0; /* out of memory */
1346 /** answer local data match */
1348 local_data_answer(struct local_zone* z, struct module_env* env,
1349 struct query_info* qinfo, struct edns_data* edns, sldns_buffer* buf,
1350 struct regional* temp, int labs, struct local_data** ldp,
1351 enum localzone_type lz_type, int tag, struct config_strlist** tag_datas,
1352 size_t tag_datas_size, char** tagname, int num_tags)
1354 struct local_data key;
1355 struct local_data* ld;
1356 struct local_rrset* lr;
1357 key.node.key = &key;
1358 key.name = qinfo->qname;
1359 key.namelen = qinfo->qname_len;
1360 key.namelabs = labs;
1361 if(lz_type == local_zone_redirect) {
1363 key.namelen = z->namelen;
1364 key.namelabs = z->namelabs;
1365 if(tag != -1 && (size_t)tag<tag_datas_size && tag_datas[tag]) {
1366 struct ub_packed_rrset_key r;
1367 memset(&r, 0, sizeof(r));
1368 if(find_tag_datas(qinfo, tag_datas[tag], &r, temp)) {
1369 verbose(VERB_ALGO, "redirect with tag data [%d] %s",
1370 tag, (tag<num_tags?tagname[tag]:"null"));
1372 /* If we found a matching alias, we should
1373 * use it as part of the answer, but we can't
1374 * encode it until we complete the alias
1376 if(qinfo->local_alias)
1378 return local_encode(qinfo, env, edns, buf, temp,
1379 &r, 1, LDNS_RCODE_NOERROR);
1383 ld = (struct local_data*)rbtree_search(&z->data, &key.node);
1388 lr = local_data_find_type(ld, qinfo->qtype, 1);
1392 /* Special case for alias matching. See local_data_answer(). */
1393 if(lz_type == local_zone_redirect &&
1394 qinfo->qtype != LDNS_RR_TYPE_CNAME &&
1395 lr->rrset->rk.type == htons(LDNS_RR_TYPE_CNAME)) {
1396 qinfo->local_alias =
1397 regional_alloc_zero(temp, sizeof(struct local_rrset));
1398 if(!qinfo->local_alias)
1399 return 0; /* out of memory */
1400 qinfo->local_alias->rrset =
1401 regional_alloc_init(temp, lr->rrset, sizeof(*lr->rrset));
1402 if(!qinfo->local_alias->rrset)
1403 return 0; /* out of memory */
1404 qinfo->local_alias->rrset->rk.dname = qinfo->qname;
1405 qinfo->local_alias->rrset->rk.dname_len = qinfo->qname_len;
1408 if(lz_type == local_zone_redirect) {
1409 /* convert rrset name to query name; like a wildcard */
1410 struct ub_packed_rrset_key r = *lr->rrset;
1411 r.rk.dname = qinfo->qname;
1412 r.rk.dname_len = qinfo->qname_len;
1413 return local_encode(qinfo, env, edns, buf, temp, &r, 1,
1414 LDNS_RCODE_NOERROR);
1416 return local_encode(qinfo, env, edns, buf, temp, lr->rrset, 1,
1417 LDNS_RCODE_NOERROR);
1421 * answer in case where no exact match is found
1422 * @param z: zone for query
1423 * @param env: module environment
1424 * @param qinfo: query
1425 * @param edns: edns from query
1426 * @param buf: buffer for answer.
1427 * @param temp: temp region for encoding
1428 * @param ld: local data, if NULL, no such name exists in localdata.
1429 * @param lz_type: type of the local zone
1430 * @return 1 if a reply is to be sent, 0 if not.
1433 lz_zone_answer(struct local_zone* z, struct module_env* env,
1434 struct query_info* qinfo, struct edns_data* edns, sldns_buffer* buf,
1435 struct regional* temp, struct local_data* ld, enum localzone_type lz_type)
1437 if(lz_type == local_zone_deny || lz_type == local_zone_inform_deny) {
1438 /** no reply at all, signal caller by clearing buffer. */
1439 sldns_buffer_clear(buf);
1440 sldns_buffer_flip(buf);
1442 } else if(lz_type == local_zone_refuse
1443 || lz_type == local_zone_always_refuse) {
1444 local_error_encode(qinfo, env, edns, buf, temp,
1445 LDNS_RCODE_REFUSED, (LDNS_RCODE_REFUSED|BIT_AA));
1447 } else if(lz_type == local_zone_static ||
1448 lz_type == local_zone_redirect ||
1449 lz_type == local_zone_always_nxdomain) {
1450 /* for static, reply nodata or nxdomain
1451 * for redirect, reply nodata */
1452 /* no additional section processing,
1453 * cname, dname or wildcard processing,
1454 * or using closest match for NSEC.
1455 * or using closest match for returning delegation downwards
1457 int rcode = (ld || lz_type == local_zone_redirect)?
1458 LDNS_RCODE_NOERROR:LDNS_RCODE_NXDOMAIN;
1460 return local_encode(qinfo, env, edns, buf, temp,
1462 local_error_encode(qinfo, env, edns, buf, temp, rcode,
1465 } else if(lz_type == local_zone_typetransparent
1466 || lz_type == local_zone_always_transparent) {
1467 /* no NODATA or NXDOMAINS for this zone type */
1470 /* else lz_type == local_zone_transparent */
1472 /* if the zone is transparent and the name exists, but the type
1473 * does not, then we should make this noerror/nodata */
1474 if(ld && ld->rrsets) {
1475 int rcode = LDNS_RCODE_NOERROR;
1477 return local_encode(qinfo, env, edns, buf, temp,
1479 local_error_encode(qinfo, env, edns, buf, temp, rcode,
1484 /* stop here, and resolve further on */
1488 /** print log information for an inform zone query */
1490 lz_inform_print(struct local_zone* z, struct query_info* qinfo,
1491 struct comm_reply* repinfo)
1493 char ip[128], txt[512];
1494 char zname[LDNS_MAX_DOMAINLEN+1];
1495 uint16_t port = ntohs(((struct sockaddr_in*)&repinfo->addr)->sin_port);
1496 dname_str(z->name, zname);
1497 addr_to_str(&repinfo->addr, repinfo->addrlen, ip, sizeof(ip));
1498 snprintf(txt, sizeof(txt), "%s inform %s@%u", zname, ip,
1500 log_nametypeclass(0, txt, qinfo->qname, qinfo->qtype, qinfo->qclass);
1503 static enum localzone_type
1504 lz_type(uint8_t *taglist, size_t taglen, uint8_t *taglist2, size_t taglen2,
1505 uint8_t *tagactions, size_t tagactionssize, enum localzone_type lzt,
1506 struct comm_reply* repinfo, struct rbtree_type* override_tree,
1507 int* tag, char** tagname, int num_tags)
1509 struct local_zone_override* lzo;
1510 if(repinfo && override_tree) {
1511 lzo = (struct local_zone_override*)addr_tree_lookup(
1512 override_tree, &repinfo->addr, repinfo->addrlen);
1513 if(lzo && lzo->type) {
1514 verbose(VERB_ALGO, "local zone override to type %s",
1515 local_zone_type2str(lzo->type));
1519 if(!taglist || !taglist2)
1521 return local_data_find_tag_action(taglist, taglen, taglist2, taglen2,
1522 tagactions, tagactionssize, lzt, tag, tagname, num_tags);
1526 local_data_find_tag_action(const uint8_t* taglist, size_t taglen,
1527 const uint8_t* taglist2, size_t taglen2, const uint8_t* tagactions,
1528 size_t tagactionssize, enum localzone_type lzt, int* tag,
1529 char* const* tagname, int num_tags)
1534 for(i=0; i<taglen && i<taglen2; i++) {
1535 tagmatch = (taglist[i] & taglist2[i]);
1536 for(j=0; j<8 && tagmatch>0; j++) {
1537 if((tagmatch & 0x1)) {
1538 *tag = (int)(i*8+j);
1539 verbose(VERB_ALGO, "matched tag [%d] %s",
1540 *tag, (*tag<num_tags?tagname[*tag]:"null"));
1541 /* does this tag have a tag action? */
1542 if(i*8+j < tagactionssize && tagactions
1543 && tagactions[i*8+j] != 0) {
1544 verbose(VERB_ALGO, "tag action [%d] %s to type %s",
1545 *tag, (*tag<num_tags?tagname[*tag]:"null"),
1546 local_zone_type2str(
1547 (enum localzone_type)
1548 tagactions[i*8+j]));
1549 return (enum localzone_type)tagactions[i*8+j];
1560 local_zones_answer(struct local_zones* zones, struct module_env* env,
1561 struct query_info* qinfo, struct edns_data* edns, sldns_buffer* buf,
1562 struct regional* temp, struct comm_reply* repinfo, uint8_t* taglist,
1563 size_t taglen, uint8_t* tagactions, size_t tagactionssize,
1564 struct config_strlist** tag_datas, size_t tag_datas_size,
1565 char** tagname, int num_tags, struct view* view)
1567 /* see if query is covered by a zone,
1568 * if so: - try to match (exact) local data
1569 * - look at zone type for negative response. */
1570 int labs = dname_count_labels(qinfo->qname);
1571 struct local_data* ld = NULL;
1572 struct local_zone* z = NULL;
1573 enum localzone_type lzt = local_zone_transparent;
1577 lock_rw_rdlock(&view->lock);
1578 if(view->local_zones &&
1579 (z = local_zones_lookup(view->local_zones,
1580 qinfo->qname, qinfo->qname_len, labs,
1583 "using localzone from view: %s",
1585 lock_rw_rdlock(&z->lock);
1588 if(!z && !view->isfirst){
1589 lock_rw_unlock(&view->lock);
1592 lock_rw_unlock(&view->lock);
1595 /* try global local_zones tree */
1596 lock_rw_rdlock(&zones->lock);
1597 if(!(z = local_zones_tags_lookup(zones, qinfo->qname,
1598 qinfo->qname_len, labs, qinfo->qclass, taglist,
1600 lock_rw_unlock(&zones->lock);
1603 lock_rw_rdlock(&z->lock);
1605 lzt = lz_type(taglist, taglen, z->taglist, z->taglen,
1606 tagactions, tagactionssize, z->type, repinfo,
1607 z->override_tree, &tag, tagname, num_tags);
1608 lock_rw_unlock(&zones->lock);
1610 if((lzt == local_zone_inform || lzt == local_zone_inform_deny)
1612 lz_inform_print(z, qinfo, repinfo);
1614 if(lzt != local_zone_always_refuse
1615 && lzt != local_zone_always_transparent
1616 && lzt != local_zone_always_nxdomain
1617 && local_data_answer(z, env, qinfo, edns, buf, temp, labs, &ld, lzt,
1618 tag, tag_datas, tag_datas_size, tagname, num_tags)) {
1619 lock_rw_unlock(&z->lock);
1620 /* We should tell the caller that encode is deferred if we found
1622 return !qinfo->local_alias;
1624 r = lz_zone_answer(z, env, qinfo, edns, buf, temp, ld, lzt);
1625 lock_rw_unlock(&z->lock);
1626 return r && !qinfo->local_alias; /* see above */
1629 const char* local_zone_type2str(enum localzone_type t)
1632 case local_zone_unset: return "unset";
1633 case local_zone_deny: return "deny";
1634 case local_zone_refuse: return "refuse";
1635 case local_zone_redirect: return "redirect";
1636 case local_zone_transparent: return "transparent";
1637 case local_zone_typetransparent: return "typetransparent";
1638 case local_zone_static: return "static";
1639 case local_zone_nodefault: return "nodefault";
1640 case local_zone_inform: return "inform";
1641 case local_zone_inform_deny: return "inform_deny";
1642 case local_zone_always_transparent: return "always_transparent";
1643 case local_zone_always_refuse: return "always_refuse";
1644 case local_zone_always_nxdomain: return "always_nxdomain";
1649 int local_zone_str2type(const char* type, enum localzone_type* t)
1651 if(strcmp(type, "deny") == 0)
1652 *t = local_zone_deny;
1653 else if(strcmp(type, "refuse") == 0)
1654 *t = local_zone_refuse;
1655 else if(strcmp(type, "static") == 0)
1656 *t = local_zone_static;
1657 else if(strcmp(type, "transparent") == 0)
1658 *t = local_zone_transparent;
1659 else if(strcmp(type, "typetransparent") == 0)
1660 *t = local_zone_typetransparent;
1661 else if(strcmp(type, "redirect") == 0)
1662 *t = local_zone_redirect;
1663 else if(strcmp(type, "inform") == 0)
1664 *t = local_zone_inform;
1665 else if(strcmp(type, "inform_deny") == 0)
1666 *t = local_zone_inform_deny;
1667 else if(strcmp(type, "always_transparent") == 0)
1668 *t = local_zone_always_transparent;
1669 else if(strcmp(type, "always_refuse") == 0)
1670 *t = local_zone_always_refuse;
1671 else if(strcmp(type, "always_nxdomain") == 0)
1672 *t = local_zone_always_nxdomain;
1677 /** iterate over the kiddies of the given name and set their parent ptr */
1679 set_kiddo_parents(struct local_zone* z, struct local_zone* match,
1680 struct local_zone* newp)
1682 /* both zones and z are locked already */
1683 /* in the sorted rbtree, the kiddies of z are located after z */
1684 /* z must be present in the tree */
1685 struct local_zone* p = z;
1686 p = (struct local_zone*)rbtree_next(&p->node);
1687 while(p!=(struct local_zone*)RBTREE_NULL &&
1688 p->dclass == z->dclass && dname_strict_subdomain(p->name,
1689 p->namelabs, z->name, z->namelabs)) {
1690 /* update parent ptr */
1691 /* only when matches with existing parent pointer, so that
1692 * deeper child structures are not touched, i.e.
1693 * update of x, and a.x, b.x, f.b.x, g.b.x, c.x, y
1694 * gets to update a.x, b.x and c.x */
1695 lock_rw_wrlock(&p->lock);
1696 if(p->parent == match)
1698 lock_rw_unlock(&p->lock);
1699 p = (struct local_zone*)rbtree_next(&p->node);
1703 struct local_zone* local_zones_add_zone(struct local_zones* zones,
1704 uint8_t* name, size_t len, int labs, uint16_t dclass,
1705 enum localzone_type tp)
1708 struct local_zone* z = local_zone_create(name, len, labs, tp, dclass);
1713 lock_rw_wrlock(&z->lock);
1715 /* find the closest parent */
1716 z->parent = local_zones_find(zones, name, len, labs, dclass);
1718 /* insert into the tree */
1719 if(!rbtree_insert(&zones->ztree, &z->node)) {
1720 /* duplicate entry! */
1721 lock_rw_unlock(&z->lock);
1722 local_zone_delete(z);
1723 log_err("internal: duplicate entry in local_zones_add_zone");
1727 /* set parent pointers right */
1728 set_kiddo_parents(z, z->parent, z);
1730 lock_rw_unlock(&z->lock);
1734 void local_zones_del_zone(struct local_zones* zones, struct local_zone* z)
1736 /* fix up parents in tree */
1737 lock_rw_wrlock(&z->lock);
1738 set_kiddo_parents(z, z, z->parent);
1740 /* remove from tree */
1741 (void)rbtree_delete(&zones->ztree, z);
1743 /* delete the zone */
1744 lock_rw_unlock(&z->lock);
1745 local_zone_delete(z);
1749 local_zones_add_RR(struct local_zones* zones, const char* rr)
1755 struct local_zone* z;
1757 if(!get_rr_nameclass(rr, &rr_name, &rr_class)) {
1760 labs = dname_count_size_labels(rr_name, &len);
1761 /* could first try readlock then get writelock if zone does not exist,
1762 * but we do not add enough RRs (from multiple threads) to optimize */
1763 lock_rw_wrlock(&zones->lock);
1764 z = local_zones_lookup(zones, rr_name, len, labs, rr_class);
1766 z = local_zones_add_zone(zones, rr_name, len, labs, rr_class,
1767 local_zone_transparent);
1769 lock_rw_unlock(&zones->lock);
1775 lock_rw_wrlock(&z->lock);
1776 lock_rw_unlock(&zones->lock);
1777 r = lz_enter_rr_into_zone(z, rr);
1778 lock_rw_unlock(&z->lock);
1782 /** returns true if the node is terminal so no deeper domain names exist */
1784 is_terminal(struct local_data* d)
1786 /* for empty nonterminals, the deeper domain names are sorted
1787 * right after them, so simply check the next name in the tree
1789 struct local_data* n = (struct local_data*)rbtree_next(&d->node);
1790 if(n == (struct local_data*)RBTREE_NULL)
1791 return 1; /* last in tree, no deeper node */
1792 if(dname_strict_subdomain(n->name, n->namelabs, d->name, d->namelabs))
1793 return 0; /* there is a deeper node */
1797 /** delete empty terminals from tree when final data is deleted */
1799 del_empty_term(struct local_zone* z, struct local_data* d,
1800 uint8_t* name, size_t len, int labs)
1802 while(d && d->rrsets == NULL && is_terminal(d)) {
1803 /* is this empty nonterminal? delete */
1804 /* note, no memory recycling in zone region */
1805 (void)rbtree_delete(&z->data, d);
1807 /* go up and to the next label */
1808 if(dname_is_root(name))
1810 dname_remove_label(&name, &len);
1812 d = lz_find_node(z, name, len, labs);
1816 void local_zones_del_data(struct local_zones* zones,
1817 uint8_t* name, size_t len, int labs, uint16_t dclass)
1820 struct local_zone* z;
1821 struct local_data* d;
1822 lock_rw_rdlock(&zones->lock);
1823 z = local_zones_lookup(zones, name, len, labs, dclass);
1825 /* no such zone, we're done */
1826 lock_rw_unlock(&zones->lock);
1829 lock_rw_wrlock(&z->lock);
1830 lock_rw_unlock(&zones->lock);
1832 /* find the domain */
1833 d = lz_find_node(z, name, len, labs);
1835 /* no memory recycling for zone deletions ... */
1837 /* did we delete the soa record ? */
1838 if(query_dname_compare(d->name, z->name) == 0)
1841 /* cleanup the empty nonterminals for this name */
1842 del_empty_term(z, d, name, len, labs);
1845 lock_rw_unlock(&z->lock);