2 * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000, 2001, 2003 Internet Software Consortium.
5 * Permission to use, copy, modify, and 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.
18 /* $Id: sdb.c,v 1.35.2.6 2004/07/22 04:04:41 marka Exp $ */
24 #include <isc/buffer.h>
27 #include <isc/magic.h>
30 #include <isc/print.h>
31 #include <isc/region.h>
34 #include <dns/callbacks.h>
36 #include <dns/dbiterator.h>
37 #include <dns/fixedname.h>
39 #include <dns/rdata.h>
40 #include <dns/rdatalist.h>
41 #include <dns/rdataset.h>
42 #include <dns/rdatasetiter.h>
43 #include <dns/rdatatype.h>
44 #include <dns/result.h>
46 #include <dns/types.h>
48 #include "rdatalist_p.h"
50 struct dns_sdbimplementation {
51 const dns_sdbmethods_t *methods;
55 isc_mutex_t driverlock;
56 dns_dbimplementation_t *dbimp;
63 dns_sdbimplementation_t *implementation;
67 unsigned int references;
70 struct dns_sdblookup {
74 ISC_LIST(dns_rdatalist_t) lists;
75 ISC_LIST(isc_buffer_t) buffers;
77 ISC_LINK(dns_sdblookup_t) link;
79 dns_rdatacallbacks_t callbacks;
81 unsigned int references;
84 typedef struct dns_sdblookup dns_sdbnode_t;
86 struct dns_sdballnodes {
87 dns_dbiterator_t common;
88 ISC_LIST(dns_sdbnode_t) nodelist;
89 dns_sdbnode_t *current;
90 dns_sdbnode_t *origin;
93 typedef dns_sdballnodes_t sdb_dbiterator_t;
95 typedef struct sdb_rdatasetiter {
96 dns_rdatasetiter_t common;
97 dns_rdatalist_t *current;
100 #define SDB_MAGIC ISC_MAGIC('S', 'D', 'B', '-')
103 * Note that "impmagic" is not the first four bytes of the struct, so
104 * ISC_MAGIC_VALID cannot be used.
106 #define VALID_SDB(sdb) ((sdb) != NULL && \
107 (sdb)->common.impmagic == SDB_MAGIC)
109 #define SDBLOOKUP_MAGIC ISC_MAGIC('S','D','B','L')
110 #define VALID_SDBLOOKUP(sdbl) ISC_MAGIC_VALID(sdbl, SDBLOOKUP_MAGIC)
111 #define VALID_SDBNODE(sdbn) VALID_SDBLOOKUP(sdbn)
113 /* These values are taken from RFC 1537 */
114 #define SDB_DEFAULT_REFRESH (60 * 60 * 8)
115 #define SDB_DEFAULT_RETRY (60 * 60 * 2)
116 #define SDB_DEFAULT_EXPIRE (60 * 60 * 24 * 7)
117 #define SDB_DEFAULT_MINIMUM (60 * 60 * 24)
119 /* This is a reasonable value */
120 #define SDB_DEFAULT_TTL (60 * 60 * 24)
122 #define MAYBE_LOCK(sdb) \
124 unsigned int flags = sdb->implementation->flags; \
125 if ((flags & DNS_SDBFLAG_THREADSAFE) == 0) \
126 LOCK(&sdb->implementation->driverlock); \
129 #define MAYBE_UNLOCK(sdb) \
131 unsigned int flags = sdb->implementation->flags; \
132 if ((flags & DNS_SDBFLAG_THREADSAFE) == 0) \
133 UNLOCK(&sdb->implementation->driverlock); \
138 static isc_result_t dns_sdb_create(isc_mem_t *mctx, dns_name_t *origin,
139 dns_dbtype_t type, dns_rdataclass_t rdclass,
140 unsigned int argc, char *argv[],
141 void *driverarg, dns_db_t **dbp);
143 static isc_result_t findrdataset(dns_db_t *db, dns_dbnode_t *node,
144 dns_dbversion_t *version,
145 dns_rdatatype_t type, dns_rdatatype_t covers,
146 isc_stdtime_t now, dns_rdataset_t *rdataset,
147 dns_rdataset_t *sigrdataset);
149 static isc_result_t createnode(dns_sdb_t *sdb, dns_sdbnode_t **nodep);
151 static void destroynode(dns_sdbnode_t *node);
153 static void detachnode(dns_db_t *db, dns_dbnode_t **targetp);
156 static void list_tordataset(dns_rdatalist_t *rdatalist,
157 dns_db_t *db, dns_dbnode_t *node,
158 dns_rdataset_t *rdataset);
160 static void dbiterator_destroy(dns_dbiterator_t **iteratorp);
161 static isc_result_t dbiterator_first(dns_dbiterator_t *iterator);
162 static isc_result_t dbiterator_last(dns_dbiterator_t *iterator);
163 static isc_result_t dbiterator_seek(dns_dbiterator_t *iterator,
165 static isc_result_t dbiterator_prev(dns_dbiterator_t *iterator);
166 static isc_result_t dbiterator_next(dns_dbiterator_t *iterator);
167 static isc_result_t dbiterator_current(dns_dbiterator_t *iterator,
168 dns_dbnode_t **nodep,
170 static isc_result_t dbiterator_pause(dns_dbiterator_t *iterator);
171 static isc_result_t dbiterator_origin(dns_dbiterator_t *iterator,
174 static dns_dbiteratormethods_t dbiterator_methods = {
186 static void rdatasetiter_destroy(dns_rdatasetiter_t **iteratorp);
187 static isc_result_t rdatasetiter_first(dns_rdatasetiter_t *iterator);
188 static isc_result_t rdatasetiter_next(dns_rdatasetiter_t *iterator);
189 static void rdatasetiter_current(dns_rdatasetiter_t *iterator,
190 dns_rdataset_t *rdataset);
192 static dns_rdatasetitermethods_t rdatasetiter_methods = {
193 rdatasetiter_destroy,
200 * Functions used by implementors of simple databases
203 dns_sdb_register(const char *drivername, const dns_sdbmethods_t *methods,
204 void *driverdata, unsigned int flags, isc_mem_t *mctx,
205 dns_sdbimplementation_t **sdbimp)
207 dns_sdbimplementation_t *imp;
210 REQUIRE(drivername != NULL);
211 REQUIRE(methods != NULL);
212 REQUIRE(methods->lookup != NULL);
213 REQUIRE(mctx != NULL);
214 REQUIRE(sdbimp != NULL && *sdbimp == NULL);
215 REQUIRE((flags & ~(DNS_SDBFLAG_RELATIVEOWNER |
216 DNS_SDBFLAG_RELATIVERDATA |
217 DNS_SDBFLAG_THREADSAFE)) == 0);
219 imp = isc_mem_get(mctx, sizeof(dns_sdbimplementation_t));
221 return (ISC_R_NOMEMORY);
222 imp->methods = methods;
223 imp->driverdata = driverdata;
226 isc_mem_attach(mctx, &imp->mctx);
227 result = isc_mutex_init(&imp->driverlock);
228 if (result != ISC_R_SUCCESS) {
229 UNEXPECTED_ERROR(__FILE__, __LINE__,
230 "isc_mutex_init() failed: %s",
231 isc_result_totext(result));
236 result = dns_db_register(drivername, dns_sdb_create, imp, mctx,
238 if (result != ISC_R_SUCCESS)
242 return (ISC_R_SUCCESS);
245 DESTROYLOCK(&imp->driverlock);
247 isc_mem_put(mctx, imp, sizeof(dns_sdbimplementation_t));
252 dns_sdb_unregister(dns_sdbimplementation_t **sdbimp) {
253 dns_sdbimplementation_t *imp;
256 REQUIRE(sdbimp != NULL && *sdbimp != NULL);
259 dns_db_unregister(&imp->dbimp);
260 DESTROYLOCK(&imp->driverlock);
263 isc_mem_put(mctx, imp, sizeof(dns_sdbimplementation_t));
264 isc_mem_detach(&mctx);
269 static inline unsigned int
270 initial_size(const char *data) {
271 unsigned int len = strlen(data);
273 for (size = 64; size < (64 * 1024); size *= 2)
280 dns_sdb_putrr(dns_sdblookup_t *lookup, const char *type, dns_ttl_t ttl,
283 dns_rdatalist_t *rdatalist;
285 dns_rdatatype_t typeval;
288 isc_buffer_t *rdatabuf;
293 dns_sdbimplementation_t *imp;
296 REQUIRE(VALID_SDBLOOKUP(lookup));
297 REQUIRE(type != NULL);
298 REQUIRE(data != NULL);
300 mctx = lookup->sdb->common.mctx;
302 DE_CONST(type, r.base);
303 r.length = strlen(type);
304 result = dns_rdatatype_fromtext(&typeval, &r);
305 if (result != ISC_R_SUCCESS)
308 rdatalist = ISC_LIST_HEAD(lookup->lists);
309 while (rdatalist != NULL) {
310 if (rdatalist->type == typeval)
312 rdatalist = ISC_LIST_NEXT(rdatalist, link);
315 if (rdatalist == NULL) {
316 rdatalist = isc_mem_get(mctx, sizeof(dns_rdatalist_t));
317 if (rdatalist == NULL)
318 return (ISC_R_NOMEMORY);
319 rdatalist->rdclass = lookup->sdb->common.rdclass;
320 rdatalist->type = typeval;
321 rdatalist->covers = 0;
322 rdatalist->ttl = ttl;
323 ISC_LIST_INIT(rdatalist->rdata);
324 ISC_LINK_INIT(rdatalist, link);
325 ISC_LIST_APPEND(lookup->lists, rdatalist, link);
327 if (rdatalist->ttl != ttl)
328 return (DNS_R_BADTTL);
330 rdata = isc_mem_get(mctx, sizeof(dns_rdata_t));
332 return (ISC_R_NOMEMORY);
333 dns_rdata_init(rdata);
335 imp = lookup->sdb->implementation;
336 if ((imp->flags & DNS_SDBFLAG_RELATIVERDATA) != 0)
337 origin = &lookup->sdb->common.origin;
339 origin = dns_rootname;
342 result = isc_lex_create(mctx, 64, &lex);
343 if (result != ISC_R_SUCCESS)
346 size = initial_size(data);
348 isc_buffer_init(&b, data, strlen(data));
349 isc_buffer_add(&b, strlen(data));
351 result = isc_lex_openbuffer(lex, &b);
352 if (result != ISC_R_SUCCESS)
356 result = isc_buffer_allocate(mctx, &rdatabuf, size);
357 if (result != ISC_R_SUCCESS)
360 result = dns_rdata_fromtext(rdata, rdatalist->rdclass,
361 rdatalist->type, lex,
365 if (result != ISC_R_SUCCESS)
366 isc_buffer_free(&rdatabuf);
368 } while (result == ISC_R_NOSPACE);
370 if (result != ISC_R_SUCCESS)
373 ISC_LIST_APPEND(rdatalist->rdata, rdata, link);
374 ISC_LIST_APPEND(lookup->buffers, rdatabuf, link);
377 isc_lex_destroy(&lex);
379 return (ISC_R_SUCCESS);
383 if (rdatabuf != NULL)
384 isc_buffer_free(&rdatabuf);
386 isc_lex_destroy(&lex);
387 isc_mem_put(mctx, rdata, sizeof(dns_rdata_t));
393 dns_sdb_putnamedrr(dns_sdballnodes_t *allnodes, const char *name,
394 const char *type, dns_ttl_t ttl, const char *data)
396 dns_name_t *newname, *origin;
397 dns_fixedname_t fnewname;
398 dns_sdb_t *sdb = (dns_sdb_t *)allnodes->common.db;
399 dns_sdbimplementation_t *imp = sdb->implementation;
400 dns_sdbnode_t *sdbnode;
401 isc_mem_t *mctx = sdb->common.mctx;
405 dns_fixedname_init(&fnewname);
406 newname = dns_fixedname_name(&fnewname);
408 if ((imp->flags & DNS_SDBFLAG_RELATIVERDATA) != 0)
409 origin = &sdb->common.origin;
411 origin = dns_rootname;
412 isc_buffer_init(&b, name, strlen(name));
413 isc_buffer_add(&b, strlen(name));
415 result = dns_name_fromtext(newname, &b, origin, ISC_FALSE, NULL);
416 if (result != ISC_R_SUCCESS)
419 if (allnodes->common.relative_names) {
420 /* All names are relative to the root */
421 unsigned int nlabels = dns_name_countlabels(newname);
422 dns_name_getlabelsequence(newname, 0, nlabels - 1, newname);
425 sdbnode = ISC_LIST_HEAD(allnodes->nodelist);
426 if (sdbnode == NULL || !dns_name_equal(sdbnode->name, newname)) {
428 result = createnode(sdb, &sdbnode);
429 if (result != ISC_R_SUCCESS)
431 sdbnode->name = isc_mem_get(mctx, sizeof(dns_name_t));
432 if (sdbnode->name == NULL) {
433 destroynode(sdbnode);
434 return (ISC_R_NOMEMORY);
436 dns_name_init(sdbnode->name, NULL);
437 result = dns_name_dup(newname, mctx, sdbnode->name);
438 if (result != ISC_R_SUCCESS) {
439 isc_mem_put(mctx, sdbnode->name, sizeof(dns_name_t));
440 destroynode(sdbnode);
443 ISC_LIST_PREPEND(allnodes->nodelist, sdbnode, link);
444 if (allnodes->origin == NULL &&
445 dns_name_equal(newname, &sdb->common.origin))
446 allnodes->origin = sdbnode;
448 return (dns_sdb_putrr(sdbnode, type, ttl, data));
453 dns_sdb_putsoa(dns_sdblookup_t *lookup, const char *mname, const char *rname,
456 char str[2 * DNS_NAME_MAXTEXT + 5 * (sizeof("2147483647")) + 7];
459 REQUIRE(mname != NULL);
460 REQUIRE(rname != NULL);
462 n = snprintf(str, sizeof str, "%s %s %u %u %u %u %u",
463 mname, rname, serial,
464 SDB_DEFAULT_REFRESH, SDB_DEFAULT_RETRY,
465 SDB_DEFAULT_EXPIRE, SDB_DEFAULT_MINIMUM);
466 if (n >= (int)sizeof(str) || n < 0)
467 return (ISC_R_NOSPACE);
468 return (dns_sdb_putrr(lookup, "SOA", SDB_DEFAULT_TTL, str));
476 attach(dns_db_t *source, dns_db_t **targetp) {
477 dns_sdb_t *sdb = (dns_sdb_t *) source;
479 REQUIRE(VALID_SDB(sdb));
482 REQUIRE(sdb->references > 0);
490 destroy(dns_sdb_t *sdb) {
492 dns_sdbimplementation_t *imp = sdb->implementation;
494 mctx = sdb->common.mctx;
496 if (imp->methods->destroy != NULL) {
498 imp->methods->destroy(sdb->zone, imp->driverdata,
503 isc_mem_free(mctx, sdb->zone);
504 DESTROYLOCK(&sdb->lock);
506 sdb->common.magic = 0;
507 sdb->common.impmagic = 0;
509 dns_name_free(&sdb->common.origin, mctx);
511 isc_mem_put(mctx, sdb, sizeof(dns_sdb_t));
512 isc_mem_detach(&mctx);
516 detach(dns_db_t **dbp) {
517 dns_sdb_t *sdb = (dns_sdb_t *)(*dbp);
518 isc_boolean_t need_destroy = ISC_FALSE;
520 REQUIRE(VALID_SDB(sdb));
522 REQUIRE(sdb->references > 0);
524 if (sdb->references == 0)
525 need_destroy = ISC_TRUE;
535 beginload(dns_db_t *db, dns_addrdatasetfunc_t *addp, dns_dbload_t **dbloadp) {
539 return (ISC_R_NOTIMPLEMENTED);
543 endload(dns_db_t *db, dns_dbload_t **dbloadp) {
546 return (ISC_R_NOTIMPLEMENTED);
550 dump(dns_db_t *db, dns_dbversion_t *version, const char *filename) {
554 return (ISC_R_NOTIMPLEMENTED);
558 currentversion(dns_db_t *db, dns_dbversion_t **versionp) {
559 REQUIRE(versionp != NULL && *versionp == NULL);
563 *versionp = (void *) &dummy;
568 newversion(dns_db_t *db, dns_dbversion_t **versionp) {
572 return (ISC_R_NOTIMPLEMENTED);
576 attachversion(dns_db_t *db, dns_dbversion_t *source,
577 dns_dbversion_t **targetp)
579 REQUIRE(source != NULL && source == (void *) &dummy);
580 REQUIRE(targetp != NULL && *targetp == NULL);
588 closeversion(dns_db_t *db, dns_dbversion_t **versionp, isc_boolean_t commit) {
589 REQUIRE(versionp != NULL && *versionp == (void *) &dummy);
590 REQUIRE(commit == ISC_FALSE);
599 createnode(dns_sdb_t *sdb, dns_sdbnode_t **nodep) {
603 node = isc_mem_get(sdb->common.mctx, sizeof(dns_sdbnode_t));
605 return (ISC_R_NOMEMORY);
608 attach((dns_db_t *)sdb, (dns_db_t **)&node->sdb);
609 ISC_LIST_INIT(node->lists);
610 ISC_LIST_INIT(node->buffers);
611 ISC_LINK_INIT(node, link);
613 result = isc_mutex_init(&node->lock);
614 if (result != ISC_R_SUCCESS) {
615 UNEXPECTED_ERROR(__FILE__, __LINE__,
616 "isc_mutex_init() failed: %s",
617 isc_result_totext(result));
618 isc_mem_put(sdb->common.mctx, node, sizeof(dns_sdbnode_t));
619 return (ISC_R_UNEXPECTED);
621 dns_rdatacallbacks_init(&node->callbacks);
622 node->references = 1;
623 node->magic = SDBLOOKUP_MAGIC;
626 return (ISC_R_SUCCESS);
630 destroynode(dns_sdbnode_t *node) {
631 dns_rdatalist_t *list;
638 mctx = sdb->common.mctx;
640 while (!ISC_LIST_EMPTY(node->lists)) {
641 list = ISC_LIST_HEAD(node->lists);
642 while (!ISC_LIST_EMPTY(list->rdata)) {
643 rdata = ISC_LIST_HEAD(list->rdata);
644 ISC_LIST_UNLINK(list->rdata, rdata, link);
645 isc_mem_put(mctx, rdata, sizeof(dns_rdata_t));
647 ISC_LIST_UNLINK(node->lists, list, link);
648 isc_mem_put(mctx, list, sizeof(dns_rdatalist_t));
651 while (!ISC_LIST_EMPTY(node->buffers)) {
652 b = ISC_LIST_HEAD(node->buffers);
653 ISC_LIST_UNLINK(node->buffers, b, link);
657 if (node->name != NULL) {
658 dns_name_free(node->name, mctx);
659 isc_mem_put(mctx, node->name, sizeof(dns_name_t));
661 DESTROYLOCK(&node->lock);
663 isc_mem_put(mctx, node, sizeof(dns_sdbnode_t));
664 detach((dns_db_t **) (void *)&sdb);
668 findnode(dns_db_t *db, dns_name_t *name, isc_boolean_t create,
669 dns_dbnode_t **nodep)
671 dns_sdb_t *sdb = (dns_sdb_t *)db;
672 dns_sdbnode_t *node = NULL;
675 char namestr[DNS_NAME_MAXTEXT + 1];
676 isc_boolean_t isorigin;
677 dns_sdbimplementation_t *imp;
679 REQUIRE(VALID_SDB(sdb));
680 REQUIRE(create == ISC_FALSE);
681 REQUIRE(nodep != NULL && *nodep == NULL);
686 imp = sdb->implementation;
688 isc_buffer_init(&b, namestr, sizeof(namestr));
689 if ((imp->flags & DNS_SDBFLAG_RELATIVEOWNER) != 0) {
693 labels = dns_name_countlabels(name) -
694 dns_name_countlabels(&db->origin);
695 dns_name_init(&relname, NULL);
696 dns_name_getlabelsequence(name, 0, labels, &relname);
697 result = dns_name_totext(&relname, ISC_TRUE, &b);
698 if (result != ISC_R_SUCCESS)
701 result = dns_name_totext(name, ISC_TRUE, &b);
702 if (result != ISC_R_SUCCESS)
705 isc_buffer_putuint8(&b, 0);
707 result = createnode(sdb, &node);
708 if (result != ISC_R_SUCCESS)
711 isorigin = dns_name_equal(name, &sdb->common.origin);
714 result = imp->methods->lookup(sdb->zone, namestr, sdb->dbdata, node);
716 if (result != ISC_R_SUCCESS && !isorigin) {
721 if (isorigin && imp->methods->authority != NULL) {
723 result = imp->methods->authority(sdb->zone, sdb->dbdata, node);
725 if (result != ISC_R_SUCCESS) {
732 return (ISC_R_SUCCESS);
736 find(dns_db_t *db, dns_name_t *name, dns_dbversion_t *version,
737 dns_rdatatype_t type, unsigned int options, isc_stdtime_t now,
738 dns_dbnode_t **nodep, dns_name_t *foundname,
739 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset)
741 dns_sdb_t *sdb = (dns_sdb_t *)db;
742 dns_dbnode_t *node = NULL;
743 dns_fixedname_t fname;
744 dns_rdataset_t xrdataset;
746 unsigned int nlabels, olabels;
750 REQUIRE(VALID_SDB(sdb));
751 REQUIRE(nodep == NULL || *nodep == NULL);
752 REQUIRE(version == NULL || version == (void *) &dummy);
757 if (!dns_name_issubdomain(name, &db->origin))
758 return (DNS_R_NXDOMAIN);
760 olabels = dns_name_countlabels(&db->origin);
761 nlabels = dns_name_countlabels(name);
763 dns_fixedname_init(&fname);
764 xname = dns_fixedname_name(&fname);
766 if (rdataset == NULL) {
767 dns_rdataset_init(&xrdataset);
768 rdataset = &xrdataset;
771 result = DNS_R_NXDOMAIN;
773 for (i = olabels; i <= nlabels; i++) {
775 * Unless this is an explicit lookup at the origin, don't
776 * look at the origin.
778 if (i == olabels && i != nlabels)
782 * Look up the next label.
784 dns_name_getlabelsequence(name, nlabels - i, i, xname);
785 result = findnode(db, xname, ISC_FALSE, &node);
786 if (result != ISC_R_SUCCESS) {
787 result = DNS_R_NXDOMAIN;
792 * Look for a DNAME at the current label, unless this is
796 result = findrdataset(db, node, version,
798 0, now, rdataset, sigrdataset);
799 if (result == ISC_R_SUCCESS) {
800 result = DNS_R_DNAME;
806 * Look for an NS at the current label, unless this is the
807 * origin or glue is ok.
809 if (i != olabels && (options & DNS_DBFIND_GLUEOK) == 0) {
810 result = findrdataset(db, node, version,
812 0, now, rdataset, sigrdataset);
813 if (result == ISC_R_SUCCESS) {
814 if (i == nlabels && type == dns_rdatatype_any)
816 result = DNS_R_ZONECUT;
817 dns_rdataset_disassociate(rdataset);
818 if (sigrdataset != NULL)
819 dns_rdataset_disassociate
822 result = DNS_R_DELEGATION;
828 * If the current name is not the qname, add another label
838 * If we're looking for ANY, we're done.
840 if (type == dns_rdatatype_any) {
841 result = ISC_R_SUCCESS;
846 * Look for the qtype.
848 result = findrdataset(db, node, version, type,
849 0, now, rdataset, sigrdataset);
850 if (result == ISC_R_SUCCESS)
856 if (type != dns_rdatatype_cname) {
857 result = findrdataset(db, node, version,
859 0, now, rdataset, sigrdataset);
860 if (result == ISC_R_SUCCESS) {
861 result = DNS_R_CNAME;
866 result = DNS_R_NXRRSET;
870 if (rdataset == &xrdataset && dns_rdataset_isassociated(rdataset))
871 dns_rdataset_disassociate(rdataset);
873 if (foundname != NULL) {
874 isc_result_t xresult;
876 xresult = dns_name_copy(xname, foundname, NULL);
877 if (xresult != ISC_R_SUCCESS) {
879 if (dns_rdataset_isassociated(rdataset))
880 dns_rdataset_disassociate(rdataset);
881 return (DNS_R_BADDB);
887 else if (node != NULL)
888 detachnode(db, &node);
894 findzonecut(dns_db_t *db, dns_name_t *name, unsigned int options,
895 isc_stdtime_t now, dns_dbnode_t **nodep, dns_name_t *foundname,
896 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset)
907 return (ISC_R_NOTIMPLEMENTED);
911 attachnode(dns_db_t *db, dns_dbnode_t *source, dns_dbnode_t **targetp) {
912 dns_sdb_t *sdb = (dns_sdb_t *)db;
913 dns_sdbnode_t *node = (dns_sdbnode_t *)source;
915 REQUIRE(VALID_SDB(sdb));
920 INSIST(node->references > 0);
922 INSIST(node->references != 0); /* Catch overflow. */
929 detachnode(dns_db_t *db, dns_dbnode_t **targetp) {
930 dns_sdb_t *sdb = (dns_sdb_t *)db;
932 isc_boolean_t need_destroy = ISC_FALSE;
934 REQUIRE(VALID_SDB(sdb));
935 REQUIRE(targetp != NULL && *targetp != NULL);
939 node = (dns_sdbnode_t *)(*targetp);
942 INSIST(node->references > 0);
944 if (node->references == 0)
945 need_destroy = ISC_TRUE;
955 expirenode(dns_db_t *db, dns_dbnode_t *node, isc_stdtime_t now) {
960 return (ISC_R_UNEXPECTED);
964 printnode(dns_db_t *db, dns_dbnode_t *node, FILE *out) {
972 createiterator(dns_db_t *db, isc_boolean_t relative_names,
973 dns_dbiterator_t **iteratorp)
975 dns_sdb_t *sdb = (dns_sdb_t *)db;
976 sdb_dbiterator_t *sdbiter;
977 dns_sdbimplementation_t *imp = sdb->implementation;
980 REQUIRE(VALID_SDB(sdb));
982 if (imp->methods->allnodes == NULL)
983 return (ISC_R_NOTIMPLEMENTED);
985 sdbiter = isc_mem_get(sdb->common.mctx, sizeof(sdb_dbiterator_t));
987 return (ISC_R_NOMEMORY);
989 sdbiter->common.methods = &dbiterator_methods;
990 sdbiter->common.db = NULL;
991 dns_db_attach(db, &sdbiter->common.db);
992 sdbiter->common.relative_names = relative_names;
993 sdbiter->common.magic = DNS_DBITERATOR_MAGIC;
994 ISC_LIST_INIT(sdbiter->nodelist);
995 sdbiter->current = NULL;
996 sdbiter->origin = NULL;
999 result = imp->methods->allnodes(sdb->zone, sdb->dbdata, sdbiter);
1001 if (result != ISC_R_SUCCESS) {
1002 dbiterator_destroy((dns_dbiterator_t **) (void *)&sdbiter);
1006 if (sdbiter->origin != NULL) {
1007 ISC_LIST_UNLINK(sdbiter->nodelist, sdbiter->origin, link);
1008 ISC_LIST_PREPEND(sdbiter->nodelist, sdbiter->origin, link);
1011 *iteratorp = (dns_dbiterator_t *)sdbiter;
1013 return (ISC_R_SUCCESS);
1017 findrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
1018 dns_rdatatype_t type, dns_rdatatype_t covers,
1019 isc_stdtime_t now, dns_rdataset_t *rdataset,
1020 dns_rdataset_t *sigrdataset)
1022 dns_rdatalist_t *list;
1023 dns_sdbnode_t *sdbnode = (dns_sdbnode_t *)node;
1025 REQUIRE(VALID_SDBNODE(node));
1031 UNUSED(sigrdataset);
1033 if (type == dns_rdatatype_sig)
1034 return (ISC_R_NOTIMPLEMENTED);
1036 list = ISC_LIST_HEAD(sdbnode->lists);
1037 while (list != NULL) {
1038 if (list->type == type)
1040 list = ISC_LIST_NEXT(list, link);
1043 return (ISC_R_NOTFOUND);
1045 list_tordataset(list, db, node, rdataset);
1047 return (ISC_R_SUCCESS);
1051 allrdatasets(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
1052 isc_stdtime_t now, dns_rdatasetiter_t **iteratorp)
1054 sdb_rdatasetiter_t *iterator;
1056 REQUIRE(version == NULL || version == &dummy);
1061 iterator = isc_mem_get(db->mctx, sizeof(sdb_rdatasetiter_t));
1062 if (iterator == NULL)
1063 return (ISC_R_NOMEMORY);
1065 iterator->common.magic = DNS_RDATASETITER_MAGIC;
1066 iterator->common.methods = &rdatasetiter_methods;
1067 iterator->common.db = db;
1068 iterator->common.node = NULL;
1069 attachnode(db, node, &iterator->common.node);
1070 iterator->common.version = version;
1071 iterator->common.now = now;
1073 *iteratorp = (dns_rdatasetiter_t *)iterator;
1075 return (ISC_R_SUCCESS);
1079 addrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
1080 isc_stdtime_t now, dns_rdataset_t *rdataset, unsigned int options,
1081 dns_rdataset_t *addedrdataset)
1089 UNUSED(addedrdataset);
1091 return (ISC_R_NOTIMPLEMENTED);
1095 subtractrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
1096 dns_rdataset_t *rdataset, unsigned int options,
1097 dns_rdataset_t *newrdataset)
1104 UNUSED(newrdataset);
1106 return (ISC_R_NOTIMPLEMENTED);
1110 deleterdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
1111 dns_rdatatype_t type, dns_rdatatype_t covers)
1119 return (ISC_R_NOTIMPLEMENTED);
1122 static isc_boolean_t
1123 issecure(dns_db_t *db) {
1130 nodecount(dns_db_t *db) {
1136 static isc_boolean_t
1137 ispersistent(dns_db_t *db) {
1143 overmem(dns_db_t *db, isc_boolean_t overmem) {
1149 settask(dns_db_t *db, isc_task_t *task) {
1155 static dns_dbmethods_t sdb_methods = {
1186 dns_sdb_create(isc_mem_t *mctx, dns_name_t *origin, dns_dbtype_t type,
1187 dns_rdataclass_t rdclass, unsigned int argc, char *argv[],
1188 void *driverarg, dns_db_t **dbp)
1191 isc_result_t result;
1192 char zonestr[DNS_NAME_MAXTEXT + 1];
1194 dns_sdbimplementation_t *imp;
1196 REQUIRE(driverarg != NULL);
1200 if (type != dns_dbtype_zone)
1201 return (ISC_R_NOTIMPLEMENTED);
1203 sdb = isc_mem_get(mctx, sizeof(dns_sdb_t));
1205 return (ISC_R_NOMEMORY);
1206 memset(sdb, 0, sizeof(dns_sdb_t));
1208 dns_name_init(&sdb->common.origin, NULL);
1209 sdb->common.attributes = 0;
1210 sdb->common.methods = &sdb_methods;
1211 sdb->common.rdclass = rdclass;
1212 sdb->common.mctx = NULL;
1213 sdb->implementation = imp;
1215 isc_mem_attach(mctx, &sdb->common.mctx);
1217 result = isc_mutex_init(&sdb->lock);
1218 if (result != ISC_R_SUCCESS) {
1219 UNEXPECTED_ERROR(__FILE__, __LINE__,
1220 "isc_mutex_init() failed: %s",
1221 isc_result_totext(result));
1222 result = ISC_R_UNEXPECTED;
1226 result = dns_name_dupwithoffsets(origin, mctx, &sdb->common.origin);
1227 if (result != ISC_R_SUCCESS)
1230 isc_buffer_init(&b, zonestr, sizeof(zonestr));
1231 result = dns_name_totext(origin, ISC_TRUE, &b);
1232 if (result != ISC_R_SUCCESS)
1233 goto cleanup_origin;
1234 isc_buffer_putuint8(&b, 0);
1236 sdb->zone = isc_mem_strdup(mctx, zonestr);
1237 if (sdb->zone == NULL) {
1238 result = ISC_R_NOMEMORY;
1239 goto cleanup_origin;
1243 if (imp->methods->create != NULL) {
1245 result = imp->methods->create(sdb->zone, argc, argv,
1246 imp->driverdata, &sdb->dbdata);
1248 if (result != ISC_R_SUCCESS)
1249 goto cleanup_zonestr;
1252 sdb->references = 1;
1254 sdb->common.magic = DNS_DB_MAGIC;
1255 sdb->common.impmagic = SDB_MAGIC;
1257 *dbp = (dns_db_t *)sdb;
1259 return (ISC_R_SUCCESS);
1262 isc_mem_free(mctx, sdb->zone);
1264 dns_name_free(&sdb->common.origin, mctx);
1266 isc_mutex_destroy(&sdb->lock);
1268 isc_mem_put(mctx, sdb, sizeof(dns_sdb_t));
1269 isc_mem_detach(&mctx);
1280 disassociate(dns_rdataset_t *rdataset) {
1281 dns_dbnode_t *node = rdataset->private5;
1282 dns_sdbnode_t *sdbnode = (dns_sdbnode_t *) node;
1283 dns_db_t *db = (dns_db_t *) sdbnode->sdb;
1285 detachnode(db, &node);
1286 isc__rdatalist_disassociate(rdataset);
1290 rdataset_clone(dns_rdataset_t *source, dns_rdataset_t *target) {
1291 dns_dbnode_t *node = source->private5;
1292 dns_sdbnode_t *sdbnode = (dns_sdbnode_t *) node;
1293 dns_db_t *db = (dns_db_t *) sdbnode->sdb;
1294 dns_dbnode_t *tempdb = NULL;
1296 isc__rdatalist_clone(source, target);
1297 attachnode(db, node, &tempdb);
1298 source->private5 = tempdb;
1301 static dns_rdatasetmethods_t methods = {
1303 isc__rdatalist_first,
1304 isc__rdatalist_next,
1305 isc__rdatalist_current,
1307 isc__rdatalist_count
1311 list_tordataset(dns_rdatalist_t *rdatalist,
1312 dns_db_t *db, dns_dbnode_t *node,
1313 dns_rdataset_t *rdataset)
1316 * The sdb rdataset is an rdatalist with some additions.
1317 * - private1 & private2 are used by the rdatalist.
1318 * - private3 & private 4 are unused.
1319 * - private5 is the node.
1322 /* This should never fail. */
1323 RUNTIME_CHECK(dns_rdatalist_tordataset(rdatalist, rdataset) ==
1326 rdataset->methods = &methods;
1327 dns_db_attachnode(db, node, &rdataset->private5);
1331 * Database Iterator Methods
1334 dbiterator_destroy(dns_dbiterator_t **iteratorp) {
1335 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)(*iteratorp);
1336 dns_sdb_t *sdb = (dns_sdb_t *)sdbiter->common.db;
1338 while (!ISC_LIST_EMPTY(sdbiter->nodelist)) {
1339 dns_sdbnode_t *node;
1340 node = ISC_LIST_HEAD(sdbiter->nodelist);
1341 ISC_LIST_UNLINK(sdbiter->nodelist, node, link);
1345 dns_db_detach(&sdbiter->common.db);
1346 isc_mem_put(sdb->common.mctx, sdbiter, sizeof(sdb_dbiterator_t));
1352 dbiterator_first(dns_dbiterator_t *iterator) {
1353 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1355 sdbiter->current = ISC_LIST_HEAD(sdbiter->nodelist);
1356 if (sdbiter->current == NULL)
1357 return (ISC_R_NOMORE);
1359 return (ISC_R_SUCCESS);
1363 dbiterator_last(dns_dbiterator_t *iterator) {
1364 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1366 sdbiter->current = ISC_LIST_TAIL(sdbiter->nodelist);
1367 if (sdbiter->current == NULL)
1368 return (ISC_R_NOMORE);
1370 return (ISC_R_SUCCESS);
1374 dbiterator_seek(dns_dbiterator_t *iterator, dns_name_t *name) {
1375 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1377 sdbiter->current = ISC_LIST_HEAD(sdbiter->nodelist);
1378 while (sdbiter->current != NULL)
1379 if (dns_name_equal(sdbiter->current->name, name))
1380 return (ISC_R_SUCCESS);
1381 return (ISC_R_NOTFOUND);
1385 dbiterator_prev(dns_dbiterator_t *iterator) {
1386 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1388 sdbiter->current = ISC_LIST_PREV(sdbiter->current, link);
1389 if (sdbiter->current == NULL)
1390 return (ISC_R_NOMORE);
1392 return (ISC_R_SUCCESS);
1396 dbiterator_next(dns_dbiterator_t *iterator) {
1397 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1399 sdbiter->current = ISC_LIST_NEXT(sdbiter->current, link);
1400 if (sdbiter->current == NULL)
1401 return (ISC_R_NOMORE);
1403 return (ISC_R_SUCCESS);
1407 dbiterator_current(dns_dbiterator_t *iterator, dns_dbnode_t **nodep,
1410 sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
1412 attachnode(iterator->db, sdbiter->current, nodep);
1414 return (dns_name_copy(sdbiter->current->name, name, NULL));
1415 return (ISC_R_SUCCESS);
1419 dbiterator_pause(dns_dbiterator_t *iterator) {
1421 return (ISC_R_SUCCESS);
1425 dbiterator_origin(dns_dbiterator_t *iterator, dns_name_t *name) {
1427 return (dns_name_copy(dns_rootname, name, NULL));
1431 * Rdataset Iterator Methods
1435 rdatasetiter_destroy(dns_rdatasetiter_t **iteratorp) {
1436 sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)(*iteratorp);
1437 detachnode(sdbiterator->common.db, &sdbiterator->common.node);
1438 isc_mem_put(sdbiterator->common.db->mctx, sdbiterator,
1439 sizeof(sdb_rdatasetiter_t));
1444 rdatasetiter_first(dns_rdatasetiter_t *iterator) {
1445 sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)iterator;
1446 dns_sdbnode_t *sdbnode = (dns_sdbnode_t *)iterator->node;
1448 if (ISC_LIST_EMPTY(sdbnode->lists))
1449 return (ISC_R_NOMORE);
1450 sdbiterator->current = ISC_LIST_HEAD(sdbnode->lists);
1451 return (ISC_R_SUCCESS);
1455 rdatasetiter_next(dns_rdatasetiter_t *iterator) {
1456 sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)iterator;
1458 sdbiterator->current = ISC_LIST_NEXT(sdbiterator->current, link);
1459 if (sdbiterator->current == NULL)
1460 return (ISC_R_NOMORE);
1462 return (ISC_R_SUCCESS);
1466 rdatasetiter_current(dns_rdatasetiter_t *iterator, dns_rdataset_t *rdataset) {
1467 sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)iterator;
1469 list_tordataset(sdbiterator->current, iterator->db, iterator->node,