2 * Copyright (C) 2004-2012 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000, 2001, 2003 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
26 #include <isc/buffer.h>
29 #include <isc/magic.h>
32 #include <isc/print.h>
33 #include <isc/region.h>
36 #include <dns/callbacks.h>
38 #include <dns/dbiterator.h>
39 #include <dns/fixedname.h>
41 #include <dns/rdata.h>
42 #include <dns/rdatalist.h>
43 #include <dns/rdataset.h>
44 #include <dns/rdatasetiter.h>
45 #include <dns/rdatatype.h>
46 #include <dns/result.h>
48 #include <dns/types.h>
50 #include "rdatalist_p.h"
52 struct dns_sdbimplementation {
53 const dns_sdbmethods_t *methods;
57 isc_mutex_t driverlock;
58 dns_dbimplementation_t *dbimp;
65 dns_sdbimplementation_t *implementation;
69 unsigned int references;
72 struct dns_sdblookup {
76 ISC_LIST(dns_rdatalist_t) lists;
77 ISC_LIST(isc_buffer_t) buffers;
79 ISC_LINK(dns_sdblookup_t) link;
81 dns_rdatacallbacks_t callbacks;
83 unsigned int references;
86 typedef struct dns_sdblookup dns_sdbnode_t;
88 struct dns_sdballnodes {
89 dns_dbiterator_t common;
90 ISC_LIST(dns_sdbnode_t) nodelist;
91 dns_sdbnode_t *current;
92 dns_sdbnode_t *origin;
95 typedef dns_sdballnodes_t sdb_dbiterator_t;
97 typedef struct sdb_rdatasetiter {
98 dns_rdatasetiter_t common;
99 dns_rdatalist_t *current;
100 } sdb_rdatasetiter_t;
102 #define SDB_MAGIC ISC_MAGIC('S', 'D', 'B', '-')
105 * Note that "impmagic" is not the first four bytes of the struct, so
106 * ISC_MAGIC_VALID cannot be used.
108 #define VALID_SDB(sdb) ((sdb) != NULL && \
109 (sdb)->common.impmagic == SDB_MAGIC)
111 #define SDBLOOKUP_MAGIC ISC_MAGIC('S','D','B','L')
112 #define VALID_SDBLOOKUP(sdbl) ISC_MAGIC_VALID(sdbl, SDBLOOKUP_MAGIC)
113 #define VALID_SDBNODE(sdbn) VALID_SDBLOOKUP(sdbn)
115 /* These values are taken from RFC1537 */
116 #define SDB_DEFAULT_REFRESH (60 * 60 * 8)
117 #define SDB_DEFAULT_RETRY (60 * 60 * 2)
118 #define SDB_DEFAULT_EXPIRE (60 * 60 * 24 * 7)
119 #define SDB_DEFAULT_MINIMUM (60 * 60 * 24)
121 /* This is a reasonable value */
122 #define SDB_DEFAULT_TTL (60 * 60 * 24)
125 #define MAYBE_LOCK(sdb) LOCK(&sdb->implementation->driverlock)
126 #define MAYBE_UNLOCK(sdb) UNLOCK(&sdb->implementation->driverlock)
128 #define MAYBE_LOCK(sdb) \
130 unsigned int flags = sdb->implementation->flags; \
131 if ((flags & DNS_SDBFLAG_THREADSAFE) == 0) \
132 LOCK(&sdb->implementation->driverlock); \
135 #define MAYBE_UNLOCK(sdb) \
137 unsigned int flags = sdb->implementation->flags; \
138 if ((flags & DNS_SDBFLAG_THREADSAFE) == 0) \
139 UNLOCK(&sdb->implementation->driverlock); \
145 static isc_result_t dns_sdb_create(isc_mem_t *mctx, dns_name_t *origin,
146 dns_dbtype_t type, dns_rdataclass_t rdclass,
147 unsigned int argc, char *argv[],
148 void *driverarg, dns_db_t **dbp);
150 static isc_result_t findrdataset(dns_db_t *db, dns_dbnode_t *node,
151 dns_dbversion_t *version,
152 dns_rdatatype_t type, dns_rdatatype_t covers,
153 isc_stdtime_t now, dns_rdataset_t *rdataset,
154 dns_rdataset_t *sigrdataset);
156 static isc_result_t createnode(dns_sdb_t *sdb, dns_sdbnode_t **nodep);
158 static void destroynode(dns_sdbnode_t *node);
160 static void detachnode(dns_db_t *db, dns_dbnode_t **targetp);
163 static void list_tordataset(dns_rdatalist_t *rdatalist,
164 dns_db_t *db, dns_dbnode_t *node,
165 dns_rdataset_t *rdataset);
167 static void dbiterator_destroy(dns_dbiterator_t **iteratorp);
168 static isc_result_t dbiterator_first(dns_dbiterator_t *iterator);
169 static isc_result_t dbiterator_last(dns_dbiterator_t *iterator);
170 static isc_result_t dbiterator_seek(dns_dbiterator_t *iterator,
172 static isc_result_t dbiterator_prev(dns_dbiterator_t *iterator);
173 static isc_result_t dbiterator_next(dns_dbiterator_t *iterator);
174 static isc_result_t dbiterator_current(dns_dbiterator_t *iterator,
175 dns_dbnode_t **nodep,
177 static isc_result_t dbiterator_pause(dns_dbiterator_t *iterator);
178 static isc_result_t dbiterator_origin(dns_dbiterator_t *iterator,
181 static dns_dbiteratormethods_t dbiterator_methods = {
193 static void rdatasetiter_destroy(dns_rdatasetiter_t **iteratorp);
194 static isc_result_t rdatasetiter_first(dns_rdatasetiter_t *iterator);
195 static isc_result_t rdatasetiter_next(dns_rdatasetiter_t *iterator);
196 static void rdatasetiter_current(dns_rdatasetiter_t *iterator,
197 dns_rdataset_t *rdataset);
199 static dns_rdatasetitermethods_t rdatasetiter_methods = {
200 rdatasetiter_destroy,
207 * Functions used by implementors of simple databases
210 dns_sdb_register(const char *drivername, const dns_sdbmethods_t *methods,
211 void *driverdata, unsigned int flags, isc_mem_t *mctx,
212 dns_sdbimplementation_t **sdbimp)
214 dns_sdbimplementation_t *imp;
217 REQUIRE(drivername != NULL);
218 REQUIRE(methods != NULL);
219 REQUIRE(methods->lookup != NULL || methods->lookup2 != NULL);
220 REQUIRE(mctx != NULL);
221 REQUIRE(sdbimp != NULL && *sdbimp == NULL);
222 REQUIRE((flags & ~(DNS_SDBFLAG_RELATIVEOWNER |
223 DNS_SDBFLAG_RELATIVERDATA |
224 DNS_SDBFLAG_THREADSAFE|
225 DNS_SDBFLAG_DNS64)) == 0);
227 imp = isc_mem_get(mctx, sizeof(dns_sdbimplementation_t));
229 return (ISC_R_NOMEMORY);
230 imp->methods = methods;
231 imp->driverdata = driverdata;
234 isc_mem_attach(mctx, &imp->mctx);
235 result = isc_mutex_init(&imp->driverlock);
236 if (result != ISC_R_SUCCESS)
240 result = dns_db_register(drivername, dns_sdb_create, imp, mctx,
242 if (result != ISC_R_SUCCESS)
246 return (ISC_R_SUCCESS);
249 DESTROYLOCK(&imp->driverlock);
251 isc_mem_put(mctx, imp, sizeof(dns_sdbimplementation_t));
256 dns_sdb_unregister(dns_sdbimplementation_t **sdbimp) {
257 dns_sdbimplementation_t *imp;
260 REQUIRE(sdbimp != NULL && *sdbimp != NULL);
263 dns_db_unregister(&imp->dbimp);
264 DESTROYLOCK(&imp->driverlock);
267 isc_mem_put(mctx, imp, sizeof(dns_sdbimplementation_t));
268 isc_mem_detach(&mctx);
273 static inline unsigned int
274 initial_size(unsigned int len) {
277 for (size = 1024; size < (64 * 1024); size *= 2)
284 dns_sdb_putrdata(dns_sdblookup_t *lookup, dns_rdatatype_t typeval,
285 dns_ttl_t ttl, const unsigned char *rdatap,
288 dns_rdatalist_t *rdatalist;
290 isc_buffer_t *rdatabuf = NULL;
295 mctx = lookup->sdb->common.mctx;
297 rdatalist = ISC_LIST_HEAD(lookup->lists);
298 while (rdatalist != NULL) {
299 if (rdatalist->type == typeval)
301 rdatalist = ISC_LIST_NEXT(rdatalist, link);
304 if (rdatalist == NULL) {
305 rdatalist = isc_mem_get(mctx, sizeof(dns_rdatalist_t));
306 if (rdatalist == NULL)
307 return (ISC_R_NOMEMORY);
308 rdatalist->rdclass = lookup->sdb->common.rdclass;
309 rdatalist->type = typeval;
310 rdatalist->covers = 0;
311 rdatalist->ttl = ttl;
312 ISC_LIST_INIT(rdatalist->rdata);
313 ISC_LINK_INIT(rdatalist, link);
314 ISC_LIST_APPEND(lookup->lists, rdatalist, link);
316 if (rdatalist->ttl != ttl)
317 return (DNS_R_BADTTL);
319 rdata = isc_mem_get(mctx, sizeof(dns_rdata_t));
321 return (ISC_R_NOMEMORY);
323 result = isc_buffer_allocate(mctx, &rdatabuf, rdlen);
324 if (result != ISC_R_SUCCESS)
326 DE_CONST(rdatap, region.base);
327 region.length = rdlen;
328 isc_buffer_copyregion(rdatabuf, ®ion);
329 isc_buffer_usedregion(rdatabuf, ®ion);
330 dns_rdata_init(rdata);
331 dns_rdata_fromregion(rdata, rdatalist->rdclass, rdatalist->type,
333 ISC_LIST_APPEND(rdatalist->rdata, rdata, link);
334 ISC_LIST_APPEND(lookup->buffers, rdatabuf, link);
339 isc_mem_put(mctx, rdata, sizeof(dns_rdata_t));
344 dns_sdb_putrr(dns_sdblookup_t *lookup, const char *type, dns_ttl_t ttl,
347 unsigned int datalen;
348 dns_rdatatype_t typeval;
350 isc_lex_t *lex = NULL;
352 unsigned char *p = NULL;
353 unsigned int size = 0; /* Init to suppress compiler warning */
355 dns_sdbimplementation_t *imp;
360 REQUIRE(VALID_SDBLOOKUP(lookup));
361 REQUIRE(type != NULL);
362 REQUIRE(data != NULL);
364 mctx = lookup->sdb->common.mctx;
366 DE_CONST(type, r.base);
367 r.length = strlen(type);
368 result = dns_rdatatype_fromtext(&typeval, &r);
369 if (result != ISC_R_SUCCESS)
372 imp = lookup->sdb->implementation;
373 if ((imp->flags & DNS_SDBFLAG_RELATIVERDATA) != 0)
374 origin = &lookup->sdb->common.origin;
376 origin = dns_rootname;
378 result = isc_lex_create(mctx, 64, &lex);
379 if (result != ISC_R_SUCCESS)
382 datalen = strlen(data);
383 size = initial_size(datalen);
385 isc_buffer_init(&b, data, datalen);
386 isc_buffer_add(&b, datalen);
387 result = isc_lex_openbuffer(lex, &b);
388 if (result != ISC_R_SUCCESS)
393 p = isc_mem_get(mctx, size);
395 result = ISC_R_NOMEMORY;
398 isc_buffer_init(&rb, p, size);
399 result = dns_rdata_fromtext(NULL,
400 lookup->sdb->common.rdclass,
405 if (result != ISC_R_NOSPACE)
413 isc_mem_put(mctx, p, size);
416 } while (result == ISC_R_NOSPACE);
418 if (result != ISC_R_SUCCESS)
421 result = dns_sdb_putrdata(lookup, typeval, ttl,
422 isc_buffer_base(&rb),
423 isc_buffer_usedlength(&rb));
426 isc_mem_put(mctx, p, size);
428 isc_lex_destroy(&lex);
434 getnode(dns_sdballnodes_t *allnodes, const char *name, dns_sdbnode_t **nodep) {
435 dns_name_t *newname, *origin;
436 dns_fixedname_t fnewname;
437 dns_sdb_t *sdb = (dns_sdb_t *)allnodes->common.db;
438 dns_sdbimplementation_t *imp = sdb->implementation;
439 dns_sdbnode_t *sdbnode;
440 isc_mem_t *mctx = sdb->common.mctx;
444 dns_fixedname_init(&fnewname);
445 newname = dns_fixedname_name(&fnewname);
447 if ((imp->flags & DNS_SDBFLAG_RELATIVERDATA) != 0)
448 origin = &sdb->common.origin;
450 origin = dns_rootname;
451 isc_buffer_init(&b, name, strlen(name));
452 isc_buffer_add(&b, strlen(name));
454 result = dns_name_fromtext(newname, &b, origin, 0, NULL);
455 if (result != ISC_R_SUCCESS)
458 if (allnodes->common.relative_names) {
459 /* All names are relative to the root */
460 unsigned int nlabels = dns_name_countlabels(newname);
461 dns_name_getlabelsequence(newname, 0, nlabels - 1, newname);
464 sdbnode = ISC_LIST_HEAD(allnodes->nodelist);
465 if (sdbnode == NULL || !dns_name_equal(sdbnode->name, newname)) {
467 result = createnode(sdb, &sdbnode);
468 if (result != ISC_R_SUCCESS)
470 sdbnode->name = isc_mem_get(mctx, sizeof(dns_name_t));
471 if (sdbnode->name == NULL) {
472 destroynode(sdbnode);
473 return (ISC_R_NOMEMORY);
475 dns_name_init(sdbnode->name, NULL);
476 result = dns_name_dup(newname, mctx, sdbnode->name);
477 if (result != ISC_R_SUCCESS) {
478 isc_mem_put(mctx, sdbnode->name, sizeof(dns_name_t));
479 destroynode(sdbnode);
482 ISC_LIST_PREPEND(allnodes->nodelist, sdbnode, link);
483 if (allnodes->origin == NULL &&
484 dns_name_equal(newname, &sdb->common.origin))
485 allnodes->origin = sdbnode;
488 return (ISC_R_SUCCESS);
492 dns_sdb_putnamedrr(dns_sdballnodes_t *allnodes, const char *name,
493 const char *type, dns_ttl_t ttl, const char *data)
496 dns_sdbnode_t *sdbnode = NULL;
497 result = getnode(allnodes, name, &sdbnode);
498 if (result != ISC_R_SUCCESS)
500 return (dns_sdb_putrr(sdbnode, type, ttl, data));
504 dns_sdb_putnamedrdata(dns_sdballnodes_t *allnodes, const char *name,
505 dns_rdatatype_t type, dns_ttl_t ttl,
506 const void *rdata, unsigned int rdlen)
509 dns_sdbnode_t *sdbnode = NULL;
510 result = getnode(allnodes, name, &sdbnode);
511 if (result != ISC_R_SUCCESS)
513 return (dns_sdb_putrdata(sdbnode, type, ttl, rdata, rdlen));
517 dns_sdb_putsoa(dns_sdblookup_t *lookup, const char *mname, const char *rname,
520 char str[2 * DNS_NAME_MAXTEXT + 5 * (sizeof("2147483647")) + 7];
523 REQUIRE(mname != NULL);
524 REQUIRE(rname != NULL);
526 n = snprintf(str, sizeof(str), "%s %s %u %u %u %u %u",
527 mname, rname, serial,
528 SDB_DEFAULT_REFRESH, SDB_DEFAULT_RETRY,
529 SDB_DEFAULT_EXPIRE, SDB_DEFAULT_MINIMUM);
530 if (n >= (int)sizeof(str) || n < 0)
531 return (ISC_R_NOSPACE);
532 return (dns_sdb_putrr(lookup, "SOA", SDB_DEFAULT_TTL, str));
540 attach(dns_db_t *source, dns_db_t **targetp) {
541 dns_sdb_t *sdb = (dns_sdb_t *) source;
543 REQUIRE(VALID_SDB(sdb));
546 REQUIRE(sdb->references > 0);
554 destroy(dns_sdb_t *sdb) {
556 dns_sdbimplementation_t *imp = sdb->implementation;
558 mctx = sdb->common.mctx;
560 if (imp->methods->destroy != NULL) {
562 imp->methods->destroy(sdb->zone, imp->driverdata,
567 isc_mem_free(mctx, sdb->zone);
568 DESTROYLOCK(&sdb->lock);
570 sdb->common.magic = 0;
571 sdb->common.impmagic = 0;
573 dns_name_free(&sdb->common.origin, mctx);
575 isc_mem_put(mctx, sdb, sizeof(dns_sdb_t));
576 isc_mem_detach(&mctx);
580 detach(dns_db_t **dbp) {
581 dns_sdb_t *sdb = (dns_sdb_t *)(*dbp);
582 isc_boolean_t need_destroy = ISC_FALSE;
584 REQUIRE(VALID_SDB(sdb));
586 REQUIRE(sdb->references > 0);
588 if (sdb->references == 0)
589 need_destroy = ISC_TRUE;
599 beginload(dns_db_t *db, dns_addrdatasetfunc_t *addp, dns_dbload_t **dbloadp) {
603 return (ISC_R_NOTIMPLEMENTED);
607 endload(dns_db_t *db, dns_dbload_t **dbloadp) {
610 return (ISC_R_NOTIMPLEMENTED);
614 dump(dns_db_t *db, dns_dbversion_t *version, const char *filename,
615 dns_masterformat_t masterformat) {
619 UNUSED(masterformat);
620 return (ISC_R_NOTIMPLEMENTED);
624 currentversion(dns_db_t *db, dns_dbversion_t **versionp) {
625 REQUIRE(versionp != NULL && *versionp == NULL);
629 *versionp = (void *) &dummy;
634 newversion(dns_db_t *db, dns_dbversion_t **versionp) {
638 return (ISC_R_NOTIMPLEMENTED);
642 attachversion(dns_db_t *db, dns_dbversion_t *source,
643 dns_dbversion_t **targetp)
645 REQUIRE(source != NULL && source == (void *) &dummy);
646 REQUIRE(targetp != NULL && *targetp == NULL);
654 closeversion(dns_db_t *db, dns_dbversion_t **versionp, isc_boolean_t commit) {
655 REQUIRE(versionp != NULL && *versionp == (void *) &dummy);
656 REQUIRE(commit == ISC_FALSE);
665 createnode(dns_sdb_t *sdb, dns_sdbnode_t **nodep) {
669 node = isc_mem_get(sdb->common.mctx, sizeof(dns_sdbnode_t));
671 return (ISC_R_NOMEMORY);
674 attach((dns_db_t *)sdb, (dns_db_t **)&node->sdb);
675 ISC_LIST_INIT(node->lists);
676 ISC_LIST_INIT(node->buffers);
677 ISC_LINK_INIT(node, link);
679 result = isc_mutex_init(&node->lock);
680 if (result != ISC_R_SUCCESS) {
681 isc_mem_put(sdb->common.mctx, node, sizeof(dns_sdbnode_t));
684 dns_rdatacallbacks_init(&node->callbacks);
685 node->references = 1;
686 node->magic = SDBLOOKUP_MAGIC;
689 return (ISC_R_SUCCESS);
693 destroynode(dns_sdbnode_t *node) {
694 dns_rdatalist_t *list;
701 mctx = sdb->common.mctx;
703 while (!ISC_LIST_EMPTY(node->lists)) {
704 list = ISC_LIST_HEAD(node->lists);
705 while (!ISC_LIST_EMPTY(list->rdata)) {
706 rdata = ISC_LIST_HEAD(list->rdata);
707 ISC_LIST_UNLINK(list->rdata, rdata, link);
708 isc_mem_put(mctx, rdata, sizeof(dns_rdata_t));
710 ISC_LIST_UNLINK(node->lists, list, link);
711 isc_mem_put(mctx, list, sizeof(dns_rdatalist_t));
714 while (!ISC_LIST_EMPTY(node->buffers)) {
715 b = ISC_LIST_HEAD(node->buffers);
716 ISC_LIST_UNLINK(node->buffers, b, link);
720 if (node->name != NULL) {
721 dns_name_free(node->name, mctx);
722 isc_mem_put(mctx, node->name, sizeof(dns_name_t));
724 DESTROYLOCK(&node->lock);
726 isc_mem_put(mctx, node, sizeof(dns_sdbnode_t));
727 detach((dns_db_t **) (void *)&sdb);
731 findnode(dns_db_t *db, dns_name_t *name, isc_boolean_t create,
732 dns_dbnode_t **nodep)
734 dns_sdb_t *sdb = (dns_sdb_t *)db;
735 dns_sdbnode_t *node = NULL;
738 char namestr[DNS_NAME_MAXTEXT + 1];
739 isc_boolean_t isorigin;
740 dns_sdbimplementation_t *imp;
744 REQUIRE(VALID_SDB(sdb));
745 REQUIRE(create == ISC_FALSE);
746 REQUIRE(nodep != NULL && *nodep == NULL);
751 imp = sdb->implementation;
753 isorigin = dns_name_equal(name, &sdb->common.origin);
755 if (imp->methods->lookup2 != NULL) {
756 if ((imp->flags & DNS_SDBFLAG_RELATIVEOWNER) != 0) {
757 labels = dns_name_countlabels(name) -
758 dns_name_countlabels(&db->origin);
759 dns_name_init(&relname, NULL);
760 dns_name_getlabelsequence(name, 0, labels, &relname);
764 isc_buffer_init(&b, namestr, sizeof(namestr));
765 if ((imp->flags & DNS_SDBFLAG_RELATIVEOWNER) != 0) {
767 labels = dns_name_countlabels(name) -
768 dns_name_countlabels(&db->origin);
769 dns_name_init(&relname, NULL);
770 dns_name_getlabelsequence(name, 0, labels, &relname);
771 result = dns_name_totext(&relname, ISC_TRUE, &b);
772 if (result != ISC_R_SUCCESS)
775 result = dns_name_totext(name, ISC_TRUE, &b);
776 if (result != ISC_R_SUCCESS)
779 isc_buffer_putuint8(&b, 0);
782 result = createnode(sdb, &node);
783 if (result != ISC_R_SUCCESS)
787 if (imp->methods->lookup2 != NULL)
788 result = imp->methods->lookup2(&sdb->common.origin, name,
791 result = imp->methods->lookup(sdb->zone, namestr, sdb->dbdata,
794 if (result != ISC_R_SUCCESS &&
795 !(result == ISC_R_NOTFOUND &&
796 isorigin && imp->methods->authority != NULL))
802 if (isorigin && imp->methods->authority != NULL) {
804 result = imp->methods->authority(sdb->zone, sdb->dbdata, node);
806 if (result != ISC_R_SUCCESS) {
813 return (ISC_R_SUCCESS);
817 find(dns_db_t *db, dns_name_t *name, dns_dbversion_t *version,
818 dns_rdatatype_t type, unsigned int options, isc_stdtime_t now,
819 dns_dbnode_t **nodep, dns_name_t *foundname,
820 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset)
822 dns_sdb_t *sdb = (dns_sdb_t *)db;
823 dns_dbnode_t *node = NULL;
824 dns_fixedname_t fname;
825 dns_rdataset_t xrdataset;
827 unsigned int nlabels, olabels;
832 REQUIRE(VALID_SDB(sdb));
833 REQUIRE(nodep == NULL || *nodep == NULL);
834 REQUIRE(version == NULL || version == (void *) &dummy);
838 if (!dns_name_issubdomain(name, &db->origin))
839 return (DNS_R_NXDOMAIN);
841 olabels = dns_name_countlabels(&db->origin);
842 nlabels = dns_name_countlabels(name);
844 dns_fixedname_init(&fname);
845 xname = dns_fixedname_name(&fname);
847 if (rdataset == NULL) {
848 dns_rdataset_init(&xrdataset);
849 rdataset = &xrdataset;
852 result = DNS_R_NXDOMAIN;
853 flags = sdb->implementation->flags;
854 i = (flags & DNS_SDBFLAG_DNS64) != 0 ? nlabels : olabels;
855 for (; i <= nlabels; i++) {
857 * Look up the next label.
859 dns_name_getlabelsequence(name, nlabels - i, i, xname);
860 result = findnode(db, xname, ISC_FALSE, &node);
861 if (result == ISC_R_NOTFOUND) {
863 * No data at zone apex?
866 return (DNS_R_BADDB);
867 result = DNS_R_NXDOMAIN;
870 if (result != ISC_R_SUCCESS)
874 * DNS64 zone's don't have DNAME or NS records.
876 if ((flags & DNS_SDBFLAG_DNS64) != 0)
880 * DNS64 zone's don't have DNAME or NS records.
882 if ((flags & DNS_SDBFLAG_DNS64) != 0)
886 * Look for a DNAME at the current label, unless this is
890 result = findrdataset(db, node, version,
892 0, now, rdataset, sigrdataset);
893 if (result == ISC_R_SUCCESS) {
894 result = DNS_R_DNAME;
900 * Look for an NS at the current label, unless this is the
901 * origin or glue is ok.
903 if (i != olabels && (options & DNS_DBFIND_GLUEOK) == 0) {
904 result = findrdataset(db, node, version,
906 0, now, rdataset, sigrdataset);
907 if (result == ISC_R_SUCCESS) {
908 if (i == nlabels && type == dns_rdatatype_any)
910 result = DNS_R_ZONECUT;
911 dns_rdataset_disassociate(rdataset);
912 if (sigrdataset != NULL &&
913 dns_rdataset_isassociated
915 dns_rdataset_disassociate
919 result = DNS_R_DELEGATION;
925 * If the current name is not the qname, add another label
936 * If we're looking for ANY, we're done.
938 if (type == dns_rdatatype_any) {
939 result = ISC_R_SUCCESS;
944 * Look for the qtype.
946 result = findrdataset(db, node, version, type,
947 0, now, rdataset, sigrdataset);
948 if (result == ISC_R_SUCCESS)
954 if (type != dns_rdatatype_cname) {
955 result = findrdataset(db, node, version,
957 0, now, rdataset, sigrdataset);
958 if (result == ISC_R_SUCCESS) {
959 result = DNS_R_CNAME;
964 result = DNS_R_NXRRSET;
968 if (rdataset == &xrdataset && dns_rdataset_isassociated(rdataset))
969 dns_rdataset_disassociate(rdataset);
971 if (foundname != NULL) {
972 isc_result_t xresult;
974 xresult = dns_name_copy(xname, foundname, NULL);
975 if (xresult != ISC_R_SUCCESS) {
978 if (dns_rdataset_isassociated(rdataset))
979 dns_rdataset_disassociate(rdataset);
980 return (DNS_R_BADDB);
986 else if (node != NULL)
987 detachnode(db, &node);
993 findzonecut(dns_db_t *db, dns_name_t *name, unsigned int options,
994 isc_stdtime_t now, dns_dbnode_t **nodep, dns_name_t *foundname,
995 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset)
1004 UNUSED(sigrdataset);
1006 return (ISC_R_NOTIMPLEMENTED);
1010 attachnode(dns_db_t *db, dns_dbnode_t *source, dns_dbnode_t **targetp) {
1011 dns_sdb_t *sdb = (dns_sdb_t *)db;
1012 dns_sdbnode_t *node = (dns_sdbnode_t *)source;
1014 REQUIRE(VALID_SDB(sdb));
1019 INSIST(node->references > 0);
1021 INSIST(node->references != 0); /* Catch overflow. */
1022 UNLOCK(&node->lock);
1028 detachnode(dns_db_t *db, dns_dbnode_t **targetp) {
1029 dns_sdb_t *sdb = (dns_sdb_t *)db;
1030 dns_sdbnode_t *node;
1031 isc_boolean_t need_destroy = ISC_FALSE;
1033 REQUIRE(VALID_SDB(sdb));
1034 REQUIRE(targetp != NULL && *targetp != NULL);
1038 node = (dns_sdbnode_t *)(*targetp);
1041 INSIST(node->references > 0);
1043 if (node->references == 0)
1044 need_destroy = ISC_TRUE;
1045 UNLOCK(&node->lock);
1054 expirenode(dns_db_t *db, dns_dbnode_t *node, isc_stdtime_t now) {
1059 return (ISC_R_UNEXPECTED);
1063 printnode(dns_db_t *db, dns_dbnode_t *node, FILE *out) {
1071 createiterator(dns_db_t *db, unsigned int options, dns_dbiterator_t **iteratorp)
1073 dns_sdb_t *sdb = (dns_sdb_t *)db;
1074 sdb_dbiterator_t *sdbiter;
1075 dns_sdbimplementation_t *imp = sdb->implementation;
1076 isc_result_t result;
1078 REQUIRE(VALID_SDB(sdb));
1080 if (imp->methods->allnodes == NULL)
1081 return (ISC_R_NOTIMPLEMENTED);
1083 if ((options & DNS_DB_NSEC3ONLY) != 0 ||
1084 (options & DNS_DB_NONSEC3) != 0)
1085 return (ISC_R_NOTIMPLEMENTED);
1087 sdbiter = isc_mem_get(sdb->common.mctx, sizeof(sdb_dbiterator_t));
1088 if (sdbiter == NULL)
1089 return (ISC_R_NOMEMORY);
1091 sdbiter->common.methods = &dbiterator_methods;
1092 sdbiter->common.db = NULL;
1093 dns_db_attach(db, &sdbiter->common.db);
1094 sdbiter->common.relative_names = ISC_TF(options & DNS_DB_RELATIVENAMES);
1095 sdbiter->common.magic = DNS_DBITERATOR_MAGIC;
1096 ISC_LIST_INIT(sdbiter->nodelist);
1097 sdbiter->current = NULL;
1098 sdbiter->origin = NULL;
1101 result = imp->methods->allnodes(sdb->zone, sdb->dbdata, sdbiter);
1103 if (result != ISC_R_SUCCESS) {
1104 dbiterator_destroy((dns_dbiterator_t **) (void *)&sdbiter);
1108 if (sdbiter->origin != NULL) {
1109 ISC_LIST_UNLINK(sdbiter->nodelist, sdbiter->origin, link);
1110 ISC_LIST_PREPEND(sdbiter->nodelist, sdbiter->origin, link);
1113 *iteratorp = (dns_dbiterator_t *)sdbiter;
1115 return (ISC_R_SUCCESS);
1119 findrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
1120 dns_rdatatype_t type, dns_rdatatype_t covers,
1121 isc_stdtime_t now, dns_rdataset_t *rdataset,
1122 dns_rdataset_t *sigrdataset)
1124 dns_rdatalist_t *list;
1125 dns_sdbnode_t *sdbnode = (dns_sdbnode_t *)node;
1127 REQUIRE(VALID_SDBNODE(node));
1133 UNUSED(sigrdataset);
1135 if (type == dns_rdatatype_rrsig)
1136 return (ISC_R_NOTIMPLEMENTED);
1138 list = ISC_LIST_HEAD(sdbnode->lists);
1139 while (list != NULL) {
1140 if (list->type == type)
1142 list = ISC_LIST_NEXT(list, link);
1145 return (ISC_R_NOTFOUND);
1147 list_tordataset(list, db, node, rdataset);
1149 return (ISC_R_SUCCESS);
1153 allrdatasets(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
1154 isc_stdtime_t now, dns_rdatasetiter_t **iteratorp)
1156 sdb_rdatasetiter_t *iterator;
1158 REQUIRE(version == NULL || version == &dummy);
1163 iterator = isc_mem_get(db->mctx, sizeof(sdb_rdatasetiter_t));
1164 if (iterator == NULL)
1165 return (ISC_R_NOMEMORY);
1167 iterator->common.magic = DNS_RDATASETITER_MAGIC;
1168 iterator->common.methods = &rdatasetiter_methods;
1169 iterator->common.db = db;
1170 iterator->common.node = NULL;
1171 attachnode(db, node, &iterator->common.node);
1172 iterator->common.version = version;
1173 iterator->common.now = now;
1175 *iteratorp = (dns_rdatasetiter_t *)iterator;
1177 return (ISC_R_SUCCESS);
1181 addrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
1182 isc_stdtime_t now, dns_rdataset_t *rdataset, unsigned int options,
1183 dns_rdataset_t *addedrdataset)
1191 UNUSED(addedrdataset);
1193 return (ISC_R_NOTIMPLEMENTED);
1197 subtractrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
1198 dns_rdataset_t *rdataset, unsigned int options,
1199 dns_rdataset_t *newrdataset)
1206 UNUSED(newrdataset);
1208 return (ISC_R_NOTIMPLEMENTED);
1212 deleterdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
1213 dns_rdatatype_t type, dns_rdatatype_t covers)
1221 return (ISC_R_NOTIMPLEMENTED);
1224 static isc_boolean_t
1225 issecure(dns_db_t *db) {
1232 nodecount(dns_db_t *db) {
1238 static isc_boolean_t
1239 ispersistent(dns_db_t *db) {
1245 overmem(dns_db_t *db, isc_boolean_t overmem) {
1251 settask(dns_db_t *db, isc_task_t *task) {
1257 static dns_dbmethods_t sdb_methods = {
1299 dns_sdb_create(isc_mem_t *mctx, dns_name_t *origin, dns_dbtype_t type,
1300 dns_rdataclass_t rdclass, unsigned int argc, char *argv[],
1301 void *driverarg, dns_db_t **dbp)
1304 isc_result_t result;
1305 char zonestr[DNS_NAME_MAXTEXT + 1];
1307 dns_sdbimplementation_t *imp;
1309 REQUIRE(driverarg != NULL);
1313 if (type != dns_dbtype_zone)
1314 return (ISC_R_NOTIMPLEMENTED);
1316 sdb = isc_mem_get(mctx, sizeof(dns_sdb_t));
1318 return (ISC_R_NOMEMORY);
1319 memset(sdb, 0, sizeof(dns_sdb_t));
1321 dns_name_init(&sdb->common.origin, NULL);
1322 sdb->common.attributes = 0;
1323 sdb->common.methods = &sdb_methods;
1324 sdb->common.rdclass = rdclass;
1325 sdb->common.mctx = NULL;
1326 sdb->implementation = imp;
1328 isc_mem_attach(mctx, &sdb->common.mctx);
1330 result = isc_mutex_init(&sdb->lock);
1331 if (result != ISC_R_SUCCESS)
1334 result = dns_name_dupwithoffsets(origin, mctx, &sdb->common.origin);
1335 if (result != ISC_R_SUCCESS)
1338 isc_buffer_init(&b, zonestr, sizeof(zonestr));
1339 result = dns_name_totext(origin, ISC_TRUE, &b);
1340 if (result != ISC_R_SUCCESS)
1341 goto cleanup_origin;
1342 isc_buffer_putuint8(&b, 0);
1344 sdb->zone = isc_mem_strdup(mctx, zonestr);
1345 if (sdb->zone == NULL) {
1346 result = ISC_R_NOMEMORY;
1347 goto cleanup_origin;
1351 if (imp->methods->create != NULL) {
1353 result = imp->methods->create(sdb->zone, argc, argv,
1354 imp->driverdata, &sdb->dbdata);
1356 if (result != ISC_R_SUCCESS)
1357 goto cleanup_zonestr;
1360 sdb->references = 1;
1362 sdb->common.magic = DNS_DB_MAGIC;
1363 sdb->common.impmagic = SDB_MAGIC;
1365 *dbp = (dns_db_t *)sdb;
1367 return (ISC_R_SUCCESS);
1370 isc_mem_free(mctx, sdb->zone);
1372 dns_name_free(&sdb->common.origin, mctx);
1374 (void)isc_mutex_destroy(&sdb->lock);
1376 isc_mem_put(mctx, sdb, sizeof(dns_sdb_t));
1377 isc_mem_detach(&mctx);
1388 disassociate(dns_rdataset_t *rdataset) {
1389 dns_dbnode_t *node = rdataset->private5;
1390 dns_sdbnode_t *sdbnode = (dns_sdbnode_t *) node;
1391 dns_db_t *db = (dns_db_t *) sdbnode->sdb;
1393 detachnode(db, &node);
1394 isc__rdatalist_disassociate(rdataset);
1398 rdataset_clone(dns_rdataset_t *source, dns_rdataset_t *target) {
1399 dns_dbnode_t *node = source->private5;
1400 dns_sdbnode_t *sdbnode = (dns_sdbnode_t *) node;
1401 dns_db_t *db = (dns_db_t *) sdbnode->sdb;
1402 dns_dbnode_t *tempdb = NULL;
1404 isc__rdatalist_clone(source, target);
1405 attachnode(db, node, &tempdb);
1406 source->private5 = tempdb;
1409 static dns_rdatasetmethods_t methods = {
1411 isc__rdatalist_first,
1412 isc__rdatalist_next,
1413 isc__rdatalist_current,
1415 isc__rdatalist_count,
1416 isc__rdatalist_addnoqname,
1417 isc__rdatalist_getnoqname,
1428 list_tordataset(dns_rdatalist_t *rdatalist,
1429 dns_db_t *db, dns_dbnode_t *node,
1430 dns_rdataset_t *rdataset)
1433 * The sdb rdataset is an rdatalist with some additions.
1434 * - private1 & private2 are used by the rdatalist.
1435 * - private3 & private 4 are unused.
1436 * - private5 is the node.
1439 /* This should never fail. */
1440 RUNTIME_CHECK(dns_rdatalist_tordataset(rdatalist, rdataset) ==
1443 rdataset->methods = &methods;
1444 dns_db_attachnode(db, node, &rdataset->private5);
1448 * Database Iterator Methods
1451 dbiterator_destroy(dns_dbiterator_t **iteratorp) {
1452 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)(*iteratorp);
1453 dns_sdb_t *sdb = (dns_sdb_t *)sdbiter->common.db;
1455 while (!ISC_LIST_EMPTY(sdbiter->nodelist)) {
1456 dns_sdbnode_t *node;
1457 node = ISC_LIST_HEAD(sdbiter->nodelist);
1458 ISC_LIST_UNLINK(sdbiter->nodelist, node, link);
1462 dns_db_detach(&sdbiter->common.db);
1463 isc_mem_put(sdb->common.mctx, sdbiter, sizeof(sdb_dbiterator_t));
1469 dbiterator_first(dns_dbiterator_t *iterator) {
1470 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1472 sdbiter->current = ISC_LIST_HEAD(sdbiter->nodelist);
1473 if (sdbiter->current == NULL)
1474 return (ISC_R_NOMORE);
1476 return (ISC_R_SUCCESS);
1480 dbiterator_last(dns_dbiterator_t *iterator) {
1481 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1483 sdbiter->current = ISC_LIST_TAIL(sdbiter->nodelist);
1484 if (sdbiter->current == NULL)
1485 return (ISC_R_NOMORE);
1487 return (ISC_R_SUCCESS);
1491 dbiterator_seek(dns_dbiterator_t *iterator, dns_name_t *name) {
1492 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1494 sdbiter->current = ISC_LIST_HEAD(sdbiter->nodelist);
1495 while (sdbiter->current != NULL) {
1496 if (dns_name_equal(sdbiter->current->name, name))
1497 return (ISC_R_SUCCESS);
1498 sdbiter->current = ISC_LIST_NEXT(sdbiter->current, link);
1500 return (ISC_R_NOTFOUND);
1504 dbiterator_prev(dns_dbiterator_t *iterator) {
1505 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1507 sdbiter->current = ISC_LIST_PREV(sdbiter->current, link);
1508 if (sdbiter->current == NULL)
1509 return (ISC_R_NOMORE);
1511 return (ISC_R_SUCCESS);
1515 dbiterator_next(dns_dbiterator_t *iterator) {
1516 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1518 sdbiter->current = ISC_LIST_NEXT(sdbiter->current, link);
1519 if (sdbiter->current == NULL)
1520 return (ISC_R_NOMORE);
1522 return (ISC_R_SUCCESS);
1526 dbiterator_current(dns_dbiterator_t *iterator, dns_dbnode_t **nodep,
1529 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1531 attachnode(iterator->db, sdbiter->current, nodep);
1533 return (dns_name_copy(sdbiter->current->name, name, NULL));
1534 return (ISC_R_SUCCESS);
1538 dbiterator_pause(dns_dbiterator_t *iterator) {
1540 return (ISC_R_SUCCESS);
1544 dbiterator_origin(dns_dbiterator_t *iterator, dns_name_t *name) {
1546 return (dns_name_copy(dns_rootname, name, NULL));
1550 * Rdataset Iterator Methods
1554 rdatasetiter_destroy(dns_rdatasetiter_t **iteratorp) {
1555 sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)(*iteratorp);
1556 detachnode(sdbiterator->common.db, &sdbiterator->common.node);
1557 isc_mem_put(sdbiterator->common.db->mctx, sdbiterator,
1558 sizeof(sdb_rdatasetiter_t));
1563 rdatasetiter_first(dns_rdatasetiter_t *iterator) {
1564 sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)iterator;
1565 dns_sdbnode_t *sdbnode = (dns_sdbnode_t *)iterator->node;
1567 if (ISC_LIST_EMPTY(sdbnode->lists))
1568 return (ISC_R_NOMORE);
1569 sdbiterator->current = ISC_LIST_HEAD(sdbnode->lists);
1570 return (ISC_R_SUCCESS);
1574 rdatasetiter_next(dns_rdatasetiter_t *iterator) {
1575 sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)iterator;
1577 sdbiterator->current = ISC_LIST_NEXT(sdbiterator->current, link);
1578 if (sdbiterator->current == NULL)
1579 return (ISC_R_NOMORE);
1581 return (ISC_R_SUCCESS);
1585 rdatasetiter_current(dns_rdatasetiter_t *iterator, dns_rdataset_t *rdataset) {
1586 sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)iterator;
1588 list_tordataset(sdbiterator->current, iterator->db, iterator->node,