2 Unix SMB/CIFS implementation.
4 bind9 dlz driver for Samba
6 Copyright (C) 2010 Andrew Tridgell
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include "param/param.h"
25 #include "lib/events/events.h"
26 #include "dsdb/samdb/samdb.h"
27 #include "dsdb/common/util.h"
28 #include "auth/auth.h"
29 #include "auth/session.h"
30 #include "auth/gensec/gensec.h"
31 #include "librpc/gen_ndr/security.h"
32 #include "auth/credentials/credentials.h"
33 #include "system/kerberos.h"
34 #include "auth/kerberos/kerberos.h"
35 #include "gen_ndr/ndr_dnsp.h"
36 #include "gen_ndr/server_id.h"
37 #include "messaging/messaging.h"
38 #include "dlz_minimal.h"
45 struct dlz_bind9_data {
46 struct b9_options options;
47 struct ldb_context *samdb;
48 struct tevent_context *ev_ctx;
49 struct loadparm_context *lp;
50 int *transaction_token;
53 /* Used for dynamic update */
54 struct smb_krb5_context *smb_krb5_ctx;
55 struct auth_session_info *session_info;
58 /* helper functions from the dlz_dlopen driver */
59 void (*log)(int level, const char *fmt, ...);
60 isc_result_t (*putrr)(dns_sdlzlookup_t *handle, const char *type,
61 dns_ttl_t ttl, const char *data);
62 isc_result_t (*putnamedrr)(dns_sdlzlookup_t *handle, const char *name,
63 const char *type, dns_ttl_t ttl, const char *data);
64 isc_result_t (*writeable_zone)(dns_view_t *view, const char *zone_name);
68 static const char *zone_prefixes[] = {
69 "CN=MicrosoftDNS,DC=DomainDnsZones",
70 "CN=MicrosoftDNS,DC=ForestDnsZones",
71 "CN=MicrosoftDNS,CN=System",
76 return the version of the API
78 _PUBLIC_ int dlz_version(unsigned int *flags)
80 return DLZ_DLOPEN_VERSION;
84 remember a helper function from the bind9 dlz_dlopen driver
86 static void b9_add_helper(struct dlz_bind9_data *state, const char *helper_name, void *ptr)
88 if (strcmp(helper_name, "log") == 0) {
91 if (strcmp(helper_name, "putrr") == 0) {
94 if (strcmp(helper_name, "putnamedrr") == 0) {
95 state->putnamedrr = ptr;
97 if (strcmp(helper_name, "writeable_zone") == 0) {
98 state->writeable_zone = ptr;
103 format a record for bind9
105 static bool b9_format(struct dlz_bind9_data *state,
107 struct dnsp_DnssrvRpcRecord *rec,
108 const char **type, const char **data)
110 switch (rec->wType) {
113 *data = rec->data.ipv4;
118 *data = rec->data.ipv6;
123 *data = rec->data.cname;
128 *data = rec->data.txt;
133 *data = rec->data.ptr;
138 *data = talloc_asprintf(mem_ctx, "%u %u %u %s",
139 rec->data.srv.wPriority,
140 rec->data.srv.wWeight,
142 rec->data.srv.nameTarget);
147 *data = talloc_asprintf(mem_ctx, "%u %s",
148 rec->data.mx.wPriority,
149 rec->data.mx.nameTarget);
154 *data = talloc_asprintf(mem_ctx, "%s %s",
161 *data = rec->data.ns;
168 /* we need to fake the authoritative nameserver to
169 * point at ourselves. This is how AD DNS servers
170 * force clients to send updates to the right local DC
172 mname = talloc_asprintf(mem_ctx, "%s.%s",
173 lpcfg_netbios_name(state->lp), lpcfg_dnsdomain(state->lp));
177 mname = strlower_talloc(mem_ctx, mname);
182 state->soa_serial = rec->data.soa.serial;
184 *data = talloc_asprintf(mem_ctx, "%s %s %u %u %u %u %u",
187 rec->data.soa.serial,
188 rec->data.soa.refresh,
190 rec->data.soa.expire,
191 rec->data.soa.minimum);
196 state->log(ISC_LOG_ERROR, "samba b9_putrr: unhandled record type %u",
204 static const struct {
205 enum dns_record_type dns_type;
209 { DNS_TYPE_A, "A" , false},
210 { DNS_TYPE_AAAA, "AAAA" , false},
211 { DNS_TYPE_CNAME, "CNAME" , true},
212 { DNS_TYPE_TXT, "TXT" , false},
213 { DNS_TYPE_PTR, "PTR" , false},
214 { DNS_TYPE_SRV, "SRV" , false},
215 { DNS_TYPE_MX, "MX" , false},
216 { DNS_TYPE_HINFO, "HINFO" , false},
217 { DNS_TYPE_NS, "NS" , false},
218 { DNS_TYPE_SOA, "SOA" , true},
223 see if a DNS type is single valued
225 static bool b9_single_valued(enum dns_record_type dns_type)
228 for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
229 if (dns_typemap[i].dns_type == dns_type) {
230 return dns_typemap[i].single_valued;
237 see if a DNS type is single valued
239 static bool b9_dns_type(const char *type, enum dns_record_type *dtype)
242 for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
243 if (strcasecmp(dns_typemap[i].typestr, type) == 0) {
244 *dtype = dns_typemap[i].dns_type;
252 #define DNS_PARSE_STR(ret, str, sep, saveptr) do { \
253 (ret) = strtok_r(str, sep, &saveptr); \
254 if ((ret) == NULL) return false; \
257 #define DNS_PARSE_UINT(ret, str, sep, saveptr) do { \
258 char *istr = strtok_r(str, sep, &saveptr); \
259 if ((istr) == NULL) return false; \
260 (ret) = strtoul(istr, NULL, 10); \
264 parse a record from bind9
266 static bool b9_parse(struct dlz_bind9_data *state,
267 const char *rdatastr,
268 struct dnsp_DnssrvRpcRecord *rec)
270 char *full_name, *dclass, *type;
271 char *str, *saveptr=NULL;
274 str = talloc_strdup(rec, rdatastr);
279 /* parse the SDLZ string form */
280 DNS_PARSE_STR(full_name, str, "\t", saveptr);
281 DNS_PARSE_UINT(rec->dwTtlSeconds, NULL, "\t", saveptr);
282 DNS_PARSE_STR(dclass, NULL, "\t", saveptr);
283 DNS_PARSE_STR(type, NULL, "\t", saveptr);
285 /* construct the record */
286 for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
287 if (strcasecmp(type, dns_typemap[i].typestr) == 0) {
288 rec->wType = dns_typemap[i].dns_type;
292 if (i == ARRAY_SIZE(dns_typemap)) {
293 state->log(ISC_LOG_ERROR, "samba_dlz: unsupported record type '%s' for '%s'",
298 switch (rec->wType) {
300 DNS_PARSE_STR(rec->data.ipv4, NULL, " ", saveptr);
304 DNS_PARSE_STR(rec->data.ipv6, NULL, " ", saveptr);
308 DNS_PARSE_STR(rec->data.cname, NULL, " ", saveptr);
312 DNS_PARSE_STR(rec->data.txt, NULL, "\t", saveptr);
316 DNS_PARSE_STR(rec->data.ptr, NULL, " ", saveptr);
320 DNS_PARSE_UINT(rec->data.srv.wPriority, NULL, " ", saveptr);
321 DNS_PARSE_UINT(rec->data.srv.wWeight, NULL, " ", saveptr);
322 DNS_PARSE_UINT(rec->data.srv.wPort, NULL, " ", saveptr);
323 DNS_PARSE_STR(rec->data.srv.nameTarget, NULL, " ", saveptr);
327 DNS_PARSE_UINT(rec->data.mx.wPriority, NULL, " ", saveptr);
328 DNS_PARSE_STR(rec->data.mx.nameTarget, NULL, " ", saveptr);
332 DNS_PARSE_STR(rec->data.hinfo.cpu, NULL, " ", saveptr);
333 DNS_PARSE_STR(rec->data.hinfo.os, NULL, " ", saveptr);
337 DNS_PARSE_STR(rec->data.ns, NULL, " ", saveptr);
341 DNS_PARSE_STR(rec->data.soa.mname, NULL, " ", saveptr);
342 DNS_PARSE_STR(rec->data.soa.rname, NULL, " ", saveptr);
343 DNS_PARSE_UINT(rec->data.soa.serial, NULL, " ", saveptr);
344 DNS_PARSE_UINT(rec->data.soa.refresh, NULL, " ", saveptr);
345 DNS_PARSE_UINT(rec->data.soa.retry, NULL, " ", saveptr);
346 DNS_PARSE_UINT(rec->data.soa.expire, NULL, " ", saveptr);
347 DNS_PARSE_UINT(rec->data.soa.minimum, NULL, " ", saveptr);
351 state->log(ISC_LOG_ERROR, "samba b9_parse: unhandled record type %u",
356 /* we should be at the end of the buffer now */
357 if (strtok_r(NULL, "\t ", &saveptr) != NULL) {
358 state->log(ISC_LOG_ERROR, "samba b9_parse: expected data at end of string for '%s'");
366 send a resource recond to bind9
368 static isc_result_t b9_putrr(struct dlz_bind9_data *state,
369 void *handle, struct dnsp_DnssrvRpcRecord *rec,
373 const char *type, *data;
374 TALLOC_CTX *tmp_ctx = talloc_new(state);
376 if (!b9_format(state, tmp_ctx, rec, &type, &data)) {
377 return ISC_R_FAILURE;
381 talloc_free(tmp_ctx);
382 return ISC_R_NOMEMORY;
387 for (i=0; types[i]; i++) {
388 if (strcmp(types[i], type) == 0) break;
390 if (types[i] == NULL) {
392 return ISC_R_SUCCESS;
396 result = state->putrr(handle, type, rec->dwTtlSeconds, data);
397 if (result != ISC_R_SUCCESS) {
398 state->log(ISC_LOG_ERROR, "Failed to put rr");
400 talloc_free(tmp_ctx);
406 send a named resource recond to bind9
408 static isc_result_t b9_putnamedrr(struct dlz_bind9_data *state,
409 void *handle, const char *name,
410 struct dnsp_DnssrvRpcRecord *rec)
413 const char *type, *data;
414 TALLOC_CTX *tmp_ctx = talloc_new(state);
416 if (!b9_format(state, tmp_ctx, rec, &type, &data)) {
417 return ISC_R_FAILURE;
421 talloc_free(tmp_ctx);
422 return ISC_R_NOMEMORY;
425 result = state->putnamedrr(handle, name, type, rec->dwTtlSeconds, data);
426 if (result != ISC_R_SUCCESS) {
427 state->log(ISC_LOG_ERROR, "Failed to put named rr '%s'", name);
429 talloc_free(tmp_ctx);
436 static isc_result_t parse_options(struct dlz_bind9_data *state,
437 unsigned int argc, char *argv[],
438 struct b9_options *options)
441 options->url = talloc_strdup(state, argv[1]);
442 if (options->url == NULL) {
443 return ISC_R_NOMEMORY;
445 state->log(ISC_LOG_INFO, "samba_dlz: Using samdb URL %s", options->url);
448 return ISC_R_SUCCESS;
453 called to initialise the driver
455 _PUBLIC_ isc_result_t dlz_create(const char *dlzname,
456 unsigned int argc, char *argv[],
459 struct dlz_bind9_data *state;
460 const char *helper_name;
467 state = talloc_zero(NULL, struct dlz_bind9_data);
469 return ISC_R_NOMEMORY;
472 tmp_ctx = talloc_new(state);
474 /* fill in the helper functions */
475 va_start(ap, dbdata);
476 while ((helper_name = va_arg(ap, const char *)) != NULL) {
477 b9_add_helper(state, helper_name, va_arg(ap, void*));
481 state->ev_ctx = s4_event_context_init(state);
482 if (state->ev_ctx == NULL) {
483 result = ISC_R_NOMEMORY;
487 result = parse_options(state, argc, argv, &state->options);
488 if (result != ISC_R_SUCCESS) {
492 state->lp = loadparm_init_global(true);
493 if (state->lp == NULL) {
494 result = ISC_R_NOMEMORY;
498 if (smb_krb5_init_context(state, state->ev_ctx, state->lp, &state->smb_krb5_ctx) != 0) {
499 result = ISC_R_NOMEMORY;
503 nt_status = gensec_init();
504 if (!NT_STATUS_IS_OK(nt_status)) {
505 talloc_free(tmp_ctx);
509 if (state->options.url == NULL) {
510 state->options.url = lpcfg_private_path(state, state->lp, "dns/sam.ldb");
511 if (state->options.url == NULL) {
512 result = ISC_R_NOMEMORY;
517 /* Do not install samba signal handlers */
518 fault_setup_disable();
520 state->samdb = samdb_connect_url(state, state->ev_ctx, state->lp,
521 system_session(state->lp), 0, state->options.url);
522 if (state->samdb == NULL) {
523 state->log(ISC_LOG_ERROR, "samba_dlz: Failed to connect to %s",
525 result = ISC_R_FAILURE;
529 dn = ldb_get_default_basedn(state->samdb);
531 state->log(ISC_LOG_ERROR, "samba_dlz: Unable to get basedn for %s - %s",
532 state->options.url, ldb_errstring(state->samdb));
533 result = ISC_R_FAILURE;
537 state->log(ISC_LOG_INFO, "samba_dlz: started for DN %s",
538 ldb_dn_get_linearized(dn));
542 talloc_free(tmp_ctx);
543 return ISC_R_SUCCESS;
553 _PUBLIC_ void dlz_destroy(void *dbdata)
555 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
556 state->log(ISC_LOG_INFO, "samba_dlz: shutting down");
562 return the base DN for a zone
564 static isc_result_t b9_find_zone_dn(struct dlz_bind9_data *state, const char *zone_name,
565 TALLOC_CTX *mem_ctx, struct ldb_dn **zone_dn)
568 TALLOC_CTX *tmp_ctx = talloc_new(state);
569 const char *attrs[] = { NULL };
572 for (i=0; zone_prefixes[i]; i++) {
574 struct ldb_result *res;
576 dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
578 talloc_free(tmp_ctx);
579 return ISC_R_NOMEMORY;
582 if (!ldb_dn_add_child_fmt(dn, "DC=%s,%s", zone_name, zone_prefixes[i])) {
583 talloc_free(tmp_ctx);
584 return ISC_R_NOMEMORY;
587 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsZone");
588 if (ret == LDB_SUCCESS) {
589 if (zone_dn != NULL) {
590 *zone_dn = talloc_steal(mem_ctx, dn);
592 talloc_free(tmp_ctx);
593 return ISC_R_SUCCESS;
598 talloc_free(tmp_ctx);
599 return ISC_R_NOTFOUND;
604 return the DN for a name. The record does not need to exist, but the
607 static isc_result_t b9_find_name_dn(struct dlz_bind9_data *state, const char *name,
608 TALLOC_CTX *mem_ctx, struct ldb_dn **dn)
612 /* work through the name piece by piece, until we find a zone */
615 result = b9_find_zone_dn(state, p, mem_ctx, dn);
616 if (result == ISC_R_SUCCESS) {
617 /* we found a zone, now extend the DN to get
622 ret = ldb_dn_add_child_fmt(*dn, "DC=@");
624 ret = ldb_dn_add_child_fmt(*dn, "DC=%.*s", (int)(p-name)-1, name);
628 return ISC_R_NOMEMORY;
630 return ISC_R_SUCCESS;
638 return ISC_R_NOTFOUND;
643 see if we handle a given zone
645 _PUBLIC_ isc_result_t dlz_findzonedb(void *dbdata, const char *name)
647 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
648 return b9_find_zone_dn(state, name, NULL, NULL);
655 static isc_result_t dlz_lookup_types(struct dlz_bind9_data *state,
656 const char *zone, const char *name,
657 dns_sdlzlookup_t *lookup,
660 TALLOC_CTX *tmp_ctx = talloc_new(state);
661 const char *attrs[] = { "dnsRecord", NULL };
662 int ret = LDB_SUCCESS, i;
663 struct ldb_result *res;
664 struct ldb_message_element *el;
667 for (i=0; zone_prefixes[i]; i++) {
668 dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
670 talloc_free(tmp_ctx);
671 return ISC_R_NOMEMORY;
674 if (!ldb_dn_add_child_fmt(dn, "DC=%s,DC=%s,%s", name, zone, zone_prefixes[i])) {
675 talloc_free(tmp_ctx);
676 return ISC_R_NOMEMORY;
679 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
680 attrs, "objectClass=dnsNode");
681 if (ret == LDB_SUCCESS) {
685 if (ret != LDB_SUCCESS) {
686 talloc_free(tmp_ctx);
687 return ISC_R_NOTFOUND;
690 el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
691 if (el == NULL || el->num_values == 0) {
692 talloc_free(tmp_ctx);
693 return ISC_R_NOTFOUND;
696 for (i=0; i<el->num_values; i++) {
697 struct dnsp_DnssrvRpcRecord rec;
698 enum ndr_err_code ndr_err;
701 ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec,
702 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
703 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
704 state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
705 ldb_dn_get_linearized(dn));
706 talloc_free(tmp_ctx);
707 return ISC_R_FAILURE;
710 result = b9_putrr(state, lookup, &rec, types);
711 if (result != ISC_R_SUCCESS) {
712 talloc_free(tmp_ctx);
717 talloc_free(tmp_ctx);
718 return ISC_R_SUCCESS;
724 _PUBLIC_ isc_result_t dlz_lookup(const char *zone, const char *name,
725 void *dbdata, dns_sdlzlookup_t *lookup)
727 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
728 return dlz_lookup_types(state, zone, name, lookup, NULL);
733 see if a zone transfer is allowed
735 _PUBLIC_ isc_result_t dlz_allowzonexfr(void *dbdata, const char *name, const char *client)
737 /* just say yes for all our zones for now */
738 return dlz_findzonedb(dbdata, name);
742 perform a zone transfer
744 _PUBLIC_ isc_result_t dlz_allnodes(const char *zone, void *dbdata,
745 dns_sdlzallnodes_t *allnodes)
747 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
748 const char *attrs[] = { "dnsRecord", NULL };
749 int ret = LDB_SUCCESS, i, j;
751 struct ldb_result *res;
752 TALLOC_CTX *tmp_ctx = talloc_new(state);
754 for (i=0; zone_prefixes[i]; i++) {
755 dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
757 talloc_free(tmp_ctx);
758 return ISC_R_NOMEMORY;
761 if (!ldb_dn_add_child_fmt(dn, "DC=%s,%s", zone, zone_prefixes[i])) {
762 talloc_free(tmp_ctx);
763 return ISC_R_NOMEMORY;
766 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_SUBTREE,
767 attrs, "objectClass=dnsNode");
768 if (ret == LDB_SUCCESS) {
772 if (ret != LDB_SUCCESS) {
773 talloc_free(tmp_ctx);
774 return ISC_R_NOTFOUND;
777 for (i=0; i<res->count; i++) {
778 struct ldb_message_element *el;
779 TALLOC_CTX *el_ctx = talloc_new(tmp_ctx);
780 const char *rdn, *name;
781 const struct ldb_val *v;
783 el = ldb_msg_find_element(res->msgs[i], "dnsRecord");
784 if (el == NULL || el->num_values == 0) {
785 state->log(ISC_LOG_INFO, "failed to find dnsRecord for %s",
786 ldb_dn_get_linearized(dn));
791 v = ldb_dn_get_rdn_val(res->msgs[i]->dn);
793 state->log(ISC_LOG_INFO, "failed to find RDN for %s",
794 ldb_dn_get_linearized(dn));
799 rdn = talloc_strndup(el_ctx, (char *)v->data, v->length);
801 talloc_free(tmp_ctx);
802 return ISC_R_NOMEMORY;
805 if (strcmp(rdn, "@") == 0) {
808 name = talloc_asprintf(el_ctx, "%s.%s", rdn, zone);
811 talloc_free(tmp_ctx);
812 return ISC_R_NOMEMORY;
815 for (j=0; j<el->num_values; j++) {
816 struct dnsp_DnssrvRpcRecord rec;
817 enum ndr_err_code ndr_err;
820 ndr_err = ndr_pull_struct_blob(&el->values[j], el_ctx, &rec,
821 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
822 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
823 state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
824 ldb_dn_get_linearized(dn));
828 result = b9_putnamedrr(state, allnodes, name, &rec);
829 if (result != ISC_R_SUCCESS) {
835 talloc_free(tmp_ctx);
837 return ISC_R_SUCCESS;
844 _PUBLIC_ isc_result_t dlz_newversion(const char *zone, void *dbdata, void **versionp)
846 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
848 state->log(ISC_LOG_INFO, "samba_dlz: starting transaction on zone %s", zone);
850 if (state->transaction_token != NULL) {
851 state->log(ISC_LOG_INFO, "samba_dlz: transaction already started for zone %s", zone);
852 return ISC_R_FAILURE;
855 state->transaction_token = talloc_zero(state, int);
856 if (state->transaction_token == NULL) {
857 return ISC_R_NOMEMORY;
860 if (ldb_transaction_start(state->samdb) != LDB_SUCCESS) {
861 state->log(ISC_LOG_INFO, "samba_dlz: failed to start a transaction for zone %s", zone);
862 talloc_free(state->transaction_token);
863 state->transaction_token = NULL;
864 return ISC_R_FAILURE;
867 *versionp = (void *)state->transaction_token;
869 return ISC_R_SUCCESS;
875 _PUBLIC_ void dlz_closeversion(const char *zone, isc_boolean_t commit,
876 void *dbdata, void **versionp)
878 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
880 if (state->transaction_token != (int *)*versionp) {
881 state->log(ISC_LOG_INFO, "samba_dlz: transaction not started for zone %s", zone);
886 if (ldb_transaction_commit(state->samdb) != LDB_SUCCESS) {
887 state->log(ISC_LOG_INFO, "samba_dlz: failed to commit a transaction for zone %s", zone);
890 state->log(ISC_LOG_INFO, "samba_dlz: committed transaction on zone %s", zone);
892 if (ldb_transaction_cancel(state->samdb) != LDB_SUCCESS) {
893 state->log(ISC_LOG_INFO, "samba_dlz: failed to cancel a transaction for zone %s", zone);
896 state->log(ISC_LOG_INFO, "samba_dlz: cancelling transaction on zone %s", zone);
899 talloc_free(state->transaction_token);
900 state->transaction_token = NULL;
906 see if there is a SOA record for a zone
908 static bool b9_has_soa(struct dlz_bind9_data *state, struct ldb_dn *dn, const char *zone)
910 const char *attrs[] = { "dnsRecord", NULL };
911 struct ldb_result *res;
912 struct ldb_message_element *el;
913 TALLOC_CTX *tmp_ctx = talloc_new(state);
916 if (!ldb_dn_add_child_fmt(dn, "DC=@,DC=%s", zone)) {
917 talloc_free(tmp_ctx);
921 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
922 attrs, "objectClass=dnsNode");
923 if (ret != LDB_SUCCESS) {
924 talloc_free(tmp_ctx);
928 el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
930 talloc_free(tmp_ctx);
933 for (i=0; i<el->num_values; i++) {
934 struct dnsp_DnssrvRpcRecord rec;
935 enum ndr_err_code ndr_err;
937 ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec,
938 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
939 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
942 if (rec.wType == DNS_TYPE_SOA) {
943 talloc_free(tmp_ctx);
948 talloc_free(tmp_ctx);
953 configure a writeable zone
955 _PUBLIC_ isc_result_t dlz_configure(dns_view_t *view, void *dbdata)
957 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
962 state->log(ISC_LOG_INFO, "samba_dlz: starting configure");
963 if (state->writeable_zone == NULL) {
964 state->log(ISC_LOG_INFO, "samba_dlz: no writeable_zone method available");
965 return ISC_R_FAILURE;
968 tmp_ctx = talloc_new(state);
970 for (i=0; zone_prefixes[i]; i++) {
971 const char *attrs[] = { "name", NULL };
973 struct ldb_result *res;
975 dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
977 talloc_free(tmp_ctx);
978 return ISC_R_NOMEMORY;
981 if (!ldb_dn_add_child_fmt(dn, "%s", zone_prefixes[i])) {
982 talloc_free(tmp_ctx);
983 return ISC_R_NOMEMORY;
986 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_SUBTREE,
987 attrs, "objectClass=dnsZone");
988 if (ret != LDB_SUCCESS) {
992 for (j=0; j<res->count; j++) {
994 const char *zone = ldb_msg_find_attr_as_string(res->msgs[j], "name", NULL);
995 struct ldb_dn *zone_dn;
1000 zone_dn = ldb_dn_copy(tmp_ctx, dn);
1001 if (zone_dn == NULL) {
1002 talloc_free(tmp_ctx);
1003 return ISC_R_NOMEMORY;
1006 if (!b9_has_soa(state, zone_dn, zone)) {
1009 result = state->writeable_zone(view, zone);
1010 if (result != ISC_R_SUCCESS) {
1011 state->log(ISC_LOG_ERROR, "samba_dlz: Failed to configure zone '%s'",
1013 talloc_free(tmp_ctx);
1016 state->log(ISC_LOG_INFO, "samba_dlz: configured writeable zone '%s'", zone);
1020 talloc_free(tmp_ctx);
1021 return ISC_R_SUCCESS;
1024 static char *strlower(char *str)
1028 for (i=0; i<strlen(str); i++) {
1029 str[i] = (char) tolower(str[i]);
1036 authorize a zone update
1038 _PUBLIC_ isc_boolean_t dlz_ssumatch(const char *signer, const char *name, const char *tcpaddr,
1039 const char *type, const char *key, uint32_t keydatalen, uint8_t *keydata,
1042 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
1043 TALLOC_CTX *tmp_ctx;
1045 struct cli_credentials *server_credentials;
1046 char *keytab_name, *username;
1050 struct gensec_security *gensec_ctx;
1051 struct auth_session_info *session_info;
1053 isc_result_t result;
1054 struct ldb_result *res;
1055 const char * attrs[] = { NULL };
1056 uint32_t access_mask;
1058 /* Remove cached credentials, if any */
1059 if (state->session_info) {
1060 talloc_free(state->session_info);
1061 state->session_info = NULL;
1063 if (state->update_name) {
1064 talloc_free(state->update_name);
1065 state->update_name = NULL;
1068 tmp_ctx = talloc_new(NULL);
1069 if (tmp_ctx == NULL) {
1070 state->log(ISC_LOG_ERROR, "samba_dlz: no memory");
1074 ap_req = data_blob_const(keydata, keydatalen);
1075 server_credentials = cli_credentials_init(tmp_ctx);
1076 if (!server_credentials) {
1077 state->log(ISC_LOG_ERROR, "samba_dlz: failed to init server credentials");
1078 talloc_free(tmp_ctx);
1082 cli_credentials_set_krb5_context(server_credentials, state->smb_krb5_ctx);
1083 cli_credentials_set_conf(server_credentials, state->lp);
1085 username = talloc_asprintf(tmp_ctx, "dns-%s", lpcfg_netbios_name(state->lp));
1086 username = strlower(username);
1087 cli_credentials_set_username(server_credentials, username, CRED_SPECIFIED);
1088 talloc_free(username);
1090 keytab_name = talloc_asprintf(tmp_ctx, "file:%s/dns.keytab",
1091 lpcfg_private_dir(state->lp));
1092 ret = cli_credentials_set_keytab_name(server_credentials, state->lp, keytab_name,
1094 talloc_free(keytab_name);
1096 state->log(ISC_LOG_ERROR, "samba_dlz: failed to obtain server credentials for %s",
1098 talloc_free(tmp_ctx);
1102 nt_status = gensec_server_start(tmp_ctx,
1103 lpcfg_gensec_settings(tmp_ctx, state->lp),
1105 if (!NT_STATUS_IS_OK(nt_status)) {
1106 state->log(ISC_LOG_ERROR, "samba_dlz: failed to start gensec server");
1107 talloc_free(tmp_ctx);
1111 gensec_set_credentials(gensec_ctx, server_credentials);
1112 gensec_set_target_service(gensec_ctx, "dns");
1114 nt_status = gensec_start_mech_by_name(gensec_ctx, "spnego");
1115 if (!NT_STATUS_IS_OK(nt_status)) {
1116 state->log(ISC_LOG_ERROR, "samba_dlz: failed to start spnego");
1117 talloc_free(tmp_ctx);
1121 nt_status = gensec_update(gensec_ctx, tmp_ctx, state->ev_ctx, ap_req, &ap_req);
1122 if (!NT_STATUS_IS_OK(nt_status)) {
1123 state->log(ISC_LOG_ERROR, "samba_dlz: spnego update failed");
1124 talloc_free(tmp_ctx);
1128 nt_status = gensec_session_info(gensec_ctx, tmp_ctx, &session_info);
1129 if (!NT_STATUS_IS_OK(nt_status)) {
1130 state->log(ISC_LOG_ERROR, "samba_dlz: failed to create session info");
1131 talloc_free(tmp_ctx);
1135 /* Get the DN from name */
1136 result = b9_find_name_dn(state, name, tmp_ctx, &dn);
1137 if (result != ISC_R_SUCCESS) {
1138 state->log(ISC_LOG_ERROR, "samba_dlz: failed to find name %s", name);
1139 talloc_free(tmp_ctx);
1143 /* make sure the dn exists, or find parent dn in case new object is being added */
1144 ldb_ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
1145 attrs, "objectClass=dnsNode");
1146 if (ldb_ret == LDB_ERR_NO_SUCH_OBJECT) {
1147 ldb_dn_remove_child_components(dn, 1);
1148 access_mask = SEC_ADS_CREATE_CHILD;
1150 } else if (ldb_ret == LDB_SUCCESS) {
1151 access_mask = SEC_STD_REQUIRED | SEC_ADS_SELF_WRITE;
1154 talloc_free(tmp_ctx);
1159 ldb_ret = dsdb_check_access_on_dn(state->samdb, tmp_ctx, dn,
1160 session_info->security_token,
1162 if (ldb_ret != LDB_SUCCESS) {
1163 state->log(ISC_LOG_INFO,
1164 "samba_dlz: disallowing update of signer=%s name=%s type=%s error=%s",
1165 signer, name, type, ldb_strerror(ldb_ret));
1166 talloc_free(tmp_ctx);
1170 /* Cache session_info, so it can be used in the actual add/delete operation */
1171 state->update_name = talloc_strdup(state, name);
1172 if (state->update_name == NULL) {
1173 state->log(ISC_LOG_ERROR, "samba_dlz: memory allocation error");
1174 talloc_free(tmp_ctx);
1177 state->session_info = talloc_steal(state, session_info);
1179 state->log(ISC_LOG_INFO, "samba_dlz: allowing update of signer=%s name=%s tcpaddr=%s type=%s key=%s",
1180 signer, name, tcpaddr, type, key);
1182 talloc_free(tmp_ctx);
1190 static isc_result_t b9_add_record(struct dlz_bind9_data *state, const char *name,
1192 struct dnsp_DnssrvRpcRecord *rec)
1194 struct ldb_message *msg;
1195 enum ndr_err_code ndr_err;
1199 msg = ldb_msg_new(rec);
1201 return ISC_R_NOMEMORY;
1204 ret = ldb_msg_add_string(msg, "objectClass", "dnsNode");
1205 if (ret != LDB_SUCCESS) {
1206 return ISC_R_FAILURE;
1209 ndr_err = ndr_push_struct_blob(&v, rec, rec, (ndr_push_flags_fn_t)ndr_push_dnsp_DnssrvRpcRecord);
1210 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1211 return ISC_R_FAILURE;
1213 ret = ldb_msg_add_value(msg, "dnsRecord", &v, NULL);
1214 if (ret != LDB_SUCCESS) {
1215 return ISC_R_FAILURE;
1218 ret = ldb_add(state->samdb, msg);
1219 if (ret != LDB_SUCCESS) {
1220 return ISC_R_FAILURE;
1223 return ISC_R_SUCCESS;
1227 see if two DNS names are the same
1229 static bool dns_name_equal(const char *name1, const char *name2)
1231 size_t len1 = strlen(name1);
1232 size_t len2 = strlen(name2);
1233 if (name1[len1-1] == '.') len1--;
1234 if (name2[len2-1] == '.') len2--;
1238 return strncasecmp_m(name1, name2, len1) == 0;
1243 see if two dns records match
1245 static bool b9_record_match(struct dlz_bind9_data *state,
1246 struct dnsp_DnssrvRpcRecord *rec1, struct dnsp_DnssrvRpcRecord *rec2)
1248 if (rec1->wType != rec2->wType) {
1251 /* see if this type is single valued */
1252 if (b9_single_valued(rec1->wType)) {
1256 /* see if the data matches */
1257 switch (rec1->wType) {
1259 return strcmp(rec1->data.ipv4, rec2->data.ipv4) == 0;
1261 return strcmp(rec1->data.ipv6, rec2->data.ipv6) == 0;
1262 case DNS_TYPE_CNAME:
1263 return dns_name_equal(rec1->data.cname, rec2->data.cname);
1265 return strcmp(rec1->data.txt, rec2->data.txt) == 0;
1267 return strcmp(rec1->data.ptr, rec2->data.ptr) == 0;
1269 return dns_name_equal(rec1->data.ns, rec2->data.ns);
1272 return rec1->data.srv.wPriority == rec2->data.srv.wPriority &&
1273 rec1->data.srv.wWeight == rec2->data.srv.wWeight &&
1274 rec1->data.srv.wPort == rec2->data.srv.wPort &&
1275 dns_name_equal(rec1->data.srv.nameTarget, rec2->data.srv.nameTarget);
1278 return rec1->data.mx.wPriority == rec2->data.mx.wPriority &&
1279 dns_name_equal(rec1->data.mx.nameTarget, rec2->data.mx.nameTarget);
1281 case DNS_TYPE_HINFO:
1282 return strcmp(rec1->data.hinfo.cpu, rec2->data.hinfo.cpu) == 0 &&
1283 strcmp(rec1->data.hinfo.os, rec2->data.hinfo.os) == 0;
1286 return dns_name_equal(rec1->data.soa.mname, rec2->data.soa.mname) &&
1287 dns_name_equal(rec1->data.soa.rname, rec2->data.soa.rname) &&
1288 rec1->data.soa.serial == rec2->data.soa.serial &&
1289 rec1->data.soa.refresh == rec2->data.soa.refresh &&
1290 rec1->data.soa.retry == rec2->data.soa.retry &&
1291 rec1->data.soa.expire == rec2->data.soa.expire &&
1292 rec1->data.soa.minimum == rec2->data.soa.minimum;
1294 state->log(ISC_LOG_ERROR, "samba b9_putrr: unhandled record type %u",
1303 * Update session_info on samdb using the cached credentials
1305 static bool b9_set_session_info(struct dlz_bind9_data *state, const char *name)
1309 if (state->update_name == NULL || state->session_info == NULL) {
1310 state->log(ISC_LOG_ERROR, "samba_dlz: invalid credentials");
1314 /* Do not use client credentials, if we not updating the client specified name */
1315 if (strcmp(state->update_name, name) != 0) {
1319 ret = ldb_set_opaque(state->samdb, "sessionInfo", state->session_info);
1320 if (ret != LDB_SUCCESS) {
1321 state->log(ISC_LOG_ERROR, "samba_dlz: unable to set session info");
1329 * Reset session_info on samdb as system session
1331 static void b9_reset_session_info(struct dlz_bind9_data *state)
1333 ldb_set_opaque(state->samdb, "sessionInfo", system_session(state->lp));
1337 add or modify a rdataset
1339 _PUBLIC_ isc_result_t dlz_addrdataset(const char *name, const char *rdatastr, void *dbdata, void *version)
1341 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
1342 struct dnsp_DnssrvRpcRecord *rec;
1344 isc_result_t result;
1345 struct ldb_result *res;
1346 const char *attrs[] = { "dnsRecord", NULL };
1348 struct ldb_message_element *el;
1349 enum ndr_err_code ndr_err;
1352 if (state->transaction_token != (void*)version) {
1353 state->log(ISC_LOG_INFO, "samba_dlz: bad transaction version");
1354 return ISC_R_FAILURE;
1357 rec = talloc_zero(state, struct dnsp_DnssrvRpcRecord);
1359 return ISC_R_NOMEMORY;
1362 unix_to_nt_time(&t, time(NULL));
1363 t /= 10*1000*1000; /* convert to seconds (NT time is in 100ns units) */
1364 t /= 3600; /* convert to hours */
1366 rec->rank = DNS_RANK_ZONE;
1367 rec->dwSerial = state->soa_serial;
1368 rec->dwTimeStamp = (uint32_t)t;
1370 if (!b9_parse(state, rdatastr, rec)) {
1371 state->log(ISC_LOG_INFO, "samba_dlz: failed to parse rdataset '%s'", rdatastr);
1373 return ISC_R_FAILURE;
1376 /* find the DN of the record */
1377 result = b9_find_name_dn(state, name, rec, &dn);
1378 if (result != ISC_R_SUCCESS) {
1383 /* get any existing records */
1384 ret = ldb_search(state->samdb, rec, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
1385 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
1386 if (!b9_set_session_info(state, name)) {
1388 return ISC_R_FAILURE;
1390 result = b9_add_record(state, name, dn, rec);
1391 b9_reset_session_info(state);
1393 if (result == ISC_R_SUCCESS) {
1394 state->log(ISC_LOG_ERROR, "samba_dlz: added %s %s", name, rdatastr);
1399 /* there are existing records. We need to see if this will
1400 * replace a record or add to it
1402 el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
1404 state->log(ISC_LOG_ERROR, "samba_dlz: no dnsRecord attribute for %s",
1405 ldb_dn_get_linearized(dn));
1407 return ISC_R_FAILURE;
1410 for (i=0; i<el->num_values; i++) {
1411 struct dnsp_DnssrvRpcRecord rec2;
1413 ndr_err = ndr_pull_struct_blob(&el->values[i], rec, &rec2,
1414 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
1415 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1416 state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
1417 ldb_dn_get_linearized(dn));
1419 return ISC_R_FAILURE;
1422 if (b9_record_match(state, rec, &rec2)) {
1426 if (i == el->num_values) {
1427 /* adding a new value */
1428 el->values = talloc_realloc(el, el->values, struct ldb_val, el->num_values+1);
1429 if (el->values == NULL) {
1431 return ISC_R_NOMEMORY;
1436 ndr_err = ndr_push_struct_blob(&el->values[i], rec, rec,
1437 (ndr_push_flags_fn_t)ndr_push_dnsp_DnssrvRpcRecord);
1438 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1439 state->log(ISC_LOG_ERROR, "samba_dlz: failed to push dnsRecord for %s",
1440 ldb_dn_get_linearized(dn));
1442 return ISC_R_FAILURE;
1446 if (!b9_set_session_info(state, name)) {
1448 return ISC_R_FAILURE;
1451 /* modify the record */
1452 el->flags = LDB_FLAG_MOD_REPLACE;
1453 ret = ldb_modify(state->samdb, res->msgs[0]);
1454 b9_reset_session_info(state);
1455 if (ret != LDB_SUCCESS) {
1456 state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
1457 ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
1459 return ISC_R_FAILURE;
1462 state->log(ISC_LOG_INFO, "samba_dlz: added rdataset %s '%s'", name, rdatastr);
1465 return ISC_R_SUCCESS;
1471 _PUBLIC_ isc_result_t dlz_subrdataset(const char *name, const char *rdatastr, void *dbdata, void *version)
1473 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
1474 struct dnsp_DnssrvRpcRecord *rec;
1476 isc_result_t result;
1477 struct ldb_result *res;
1478 const char *attrs[] = { "dnsRecord", NULL };
1480 struct ldb_message_element *el;
1481 enum ndr_err_code ndr_err;
1483 if (state->transaction_token != (void*)version) {
1484 state->log(ISC_LOG_INFO, "samba_dlz: bad transaction version");
1485 return ISC_R_FAILURE;
1488 rec = talloc_zero(state, struct dnsp_DnssrvRpcRecord);
1490 return ISC_R_NOMEMORY;
1493 if (!b9_parse(state, rdatastr, rec)) {
1494 state->log(ISC_LOG_INFO, "samba_dlz: failed to parse rdataset '%s'", rdatastr);
1496 return ISC_R_FAILURE;
1499 /* find the DN of the record */
1500 result = b9_find_name_dn(state, name, rec, &dn);
1501 if (result != ISC_R_SUCCESS) {
1506 /* get the existing records */
1507 ret = ldb_search(state->samdb, rec, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
1508 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
1510 return ISC_R_NOTFOUND;
1513 /* there are existing records. We need to see if any match
1515 el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
1516 if (el == NULL || el->num_values == 0) {
1517 state->log(ISC_LOG_ERROR, "samba_dlz: no dnsRecord attribute for %s",
1518 ldb_dn_get_linearized(dn));
1520 return ISC_R_FAILURE;
1523 for (i=0; i<el->num_values; i++) {
1524 struct dnsp_DnssrvRpcRecord rec2;
1526 ndr_err = ndr_pull_struct_blob(&el->values[i], rec, &rec2,
1527 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
1528 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1529 state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
1530 ldb_dn_get_linearized(dn));
1532 return ISC_R_FAILURE;
1535 if (b9_record_match(state, rec, &rec2)) {
1539 if (i == el->num_values) {
1541 return ISC_R_NOTFOUND;
1544 if (i < el->num_values-1) {
1545 memmove(&el->values[i], &el->values[i+1], sizeof(el->values[0])*((el->num_values-1)-i));
1549 if (!b9_set_session_info(state, name)) {
1551 return ISC_R_FAILURE;
1554 if (el->num_values == 0) {
1555 /* delete the record */
1556 ret = ldb_delete(state->samdb, dn);
1557 b9_reset_session_info(state);
1559 /* modify the record */
1560 el->flags = LDB_FLAG_MOD_REPLACE;
1561 ret = ldb_modify(state->samdb, res->msgs[0]);
1563 b9_reset_session_info(state);
1564 if (ret != LDB_SUCCESS) {
1565 state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
1566 ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
1568 return ISC_R_FAILURE;
1571 state->log(ISC_LOG_INFO, "samba_dlz: subtracted rdataset %s '%s'", name, rdatastr);
1574 return ISC_R_SUCCESS;
1579 delete all records of the given type
1581 _PUBLIC_ isc_result_t dlz_delrdataset(const char *name, const char *type, void *dbdata, void *version)
1583 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
1584 TALLOC_CTX *tmp_ctx;
1586 isc_result_t result;
1587 struct ldb_result *res;
1588 const char *attrs[] = { "dnsRecord", NULL };
1590 struct ldb_message_element *el;
1591 enum ndr_err_code ndr_err;
1592 enum dns_record_type dns_type;
1595 if (state->transaction_token != (void*)version) {
1596 state->log(ISC_LOG_INFO, "samba_dlz: bad transaction version");
1597 return ISC_R_FAILURE;
1600 if (!b9_dns_type(type, &dns_type)) {
1601 state->log(ISC_LOG_INFO, "samba_dlz: bad dns type %s in delete", type);
1602 return ISC_R_FAILURE;
1605 tmp_ctx = talloc_new(state);
1607 /* find the DN of the record */
1608 result = b9_find_name_dn(state, name, tmp_ctx, &dn);
1609 if (result != ISC_R_SUCCESS) {
1610 talloc_free(tmp_ctx);
1614 /* get the existing records */
1615 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
1616 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
1617 talloc_free(tmp_ctx);
1618 return ISC_R_NOTFOUND;
1621 /* there are existing records. We need to see if any match the type
1623 el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
1624 if (el == NULL || el->num_values == 0) {
1625 talloc_free(tmp_ctx);
1626 return ISC_R_NOTFOUND;
1629 for (i=0; i<el->num_values; i++) {
1630 struct dnsp_DnssrvRpcRecord rec2;
1632 ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec2,
1633 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
1634 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1635 state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
1636 ldb_dn_get_linearized(dn));
1637 talloc_free(tmp_ctx);
1638 return ISC_R_FAILURE;
1641 if (dns_type == rec2.wType) {
1642 if (i < el->num_values-1) {
1643 memmove(&el->values[i], &el->values[i+1],
1644 sizeof(el->values[0])*((el->num_values-1)-i));
1653 talloc_free(tmp_ctx);
1654 return ISC_R_FAILURE;
1657 if (!b9_set_session_info(state, name)) {
1658 talloc_free(tmp_ctx);
1659 return ISC_R_FAILURE;
1662 if (el->num_values == 0) {
1663 /* delete the record */
1664 ret = ldb_delete(state->samdb, dn);
1666 /* modify the record */
1667 el->flags = LDB_FLAG_MOD_REPLACE;
1668 ret = ldb_modify(state->samdb, res->msgs[0]);
1670 b9_reset_session_info(state);
1671 if (ret != LDB_SUCCESS) {
1672 state->log(ISC_LOG_ERROR, "samba_dlz: failed to delete type %s in %s - %s",
1673 type, ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
1674 talloc_free(tmp_ctx);
1675 return ISC_R_FAILURE;
1678 state->log(ISC_LOG_INFO, "samba_dlz: deleted rdataset %s of type %s", name, type);
1680 talloc_free(tmp_ctx);
1681 return ISC_R_SUCCESS;