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 "lib/cmdline/popt_common.h"
39 #include "dlz_minimal.h"
47 struct dlz_bind9_data {
48 struct b9_options options;
49 struct ldb_context *samdb;
50 struct tevent_context *ev_ctx;
51 struct loadparm_context *lp;
52 int *transaction_token;
55 /* Used for dynamic update */
56 struct smb_krb5_context *smb_krb5_ctx;
57 struct auth4_context *auth_context;
58 struct auth_session_info *session_info;
61 /* helper functions from the dlz_dlopen driver */
63 dns_sdlz_putrr_t *putrr;
64 dns_sdlz_putnamedrr_t *putnamedrr;
65 dns_dlz_writeablezone_t *writeable_zone;
68 static struct dlz_bind9_data *dlz_bind9_state = NULL;
69 static int dlz_bind9_state_ref_count = 0;
71 static const char *zone_prefixes[] = {
72 "CN=MicrosoftDNS,DC=DomainDnsZones",
73 "CN=MicrosoftDNS,DC=ForestDnsZones",
74 "CN=MicrosoftDNS,CN=System",
79 return the version of the API
81 _PUBLIC_ int dlz_version(unsigned int *flags)
83 return DLZ_DLOPEN_VERSION;
87 remember a helper function from the bind9 dlz_dlopen driver
89 static void b9_add_helper(struct dlz_bind9_data *state, const char *helper_name, void *ptr)
91 if (strcmp(helper_name, "log") == 0) {
94 if (strcmp(helper_name, "putrr") == 0) {
97 if (strcmp(helper_name, "putnamedrr") == 0) {
98 state->putnamedrr = ptr;
100 if (strcmp(helper_name, "writeable_zone") == 0) {
101 state->writeable_zone = ptr;
106 format a record for bind9
108 static bool b9_format(struct dlz_bind9_data *state,
110 struct dnsp_DnssrvRpcRecord *rec,
111 const char **type, const char **data)
116 switch (rec->wType) {
119 *data = rec->data.ipv4;
124 *data = rec->data.ipv6;
129 *data = rec->data.cname;
134 tmp = talloc_asprintf(mem_ctx, "\"%s\"", rec->data.txt.str[0]);
135 for (i=1; i<rec->data.txt.count; i++) {
136 tmp = talloc_asprintf_append(tmp, " \"%s\"", rec->data.txt.str[i]);
143 *data = rec->data.ptr;
148 *data = talloc_asprintf(mem_ctx, "%u %u %u %s",
149 rec->data.srv.wPriority,
150 rec->data.srv.wWeight,
152 rec->data.srv.nameTarget);
157 *data = talloc_asprintf(mem_ctx, "%u %s",
158 rec->data.mx.wPriority,
159 rec->data.mx.nameTarget);
164 *data = talloc_asprintf(mem_ctx, "%s %s",
171 *data = rec->data.ns;
178 /* we need to fake the authoritative nameserver to
179 * point at ourselves. This is how AD DNS servers
180 * force clients to send updates to the right local DC
182 mname = talloc_asprintf(mem_ctx, "%s.%s",
183 lpcfg_netbios_name(state->lp), lpcfg_dnsdomain(state->lp));
187 mname = strlower_talloc(mem_ctx, mname);
192 state->soa_serial = rec->data.soa.serial;
194 *data = talloc_asprintf(mem_ctx, "%s %s %u %u %u %u %u",
197 rec->data.soa.serial,
198 rec->data.soa.refresh,
200 rec->data.soa.expire,
201 rec->data.soa.minimum);
206 state->log(ISC_LOG_ERROR, "samba b9_putrr: unhandled record type %u",
214 static const struct {
215 enum dns_record_type dns_type;
219 { DNS_TYPE_A, "A" , false},
220 { DNS_TYPE_AAAA, "AAAA" , false},
221 { DNS_TYPE_CNAME, "CNAME" , true},
222 { DNS_TYPE_TXT, "TXT" , false},
223 { DNS_TYPE_PTR, "PTR" , false},
224 { DNS_TYPE_SRV, "SRV" , false},
225 { DNS_TYPE_MX, "MX" , false},
226 { DNS_TYPE_HINFO, "HINFO" , false},
227 { DNS_TYPE_NS, "NS" , false},
228 { DNS_TYPE_SOA, "SOA" , true},
233 see if a DNS type is single valued
235 static bool b9_single_valued(enum dns_record_type dns_type)
238 for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
239 if (dns_typemap[i].dns_type == dns_type) {
240 return dns_typemap[i].single_valued;
247 see if a DNS type is single valued
249 static bool b9_dns_type(const char *type, enum dns_record_type *dtype)
252 for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
253 if (strcasecmp(dns_typemap[i].typestr, type) == 0) {
254 *dtype = dns_typemap[i].dns_type;
262 #define DNS_PARSE_STR(ret, str, sep, saveptr) do { \
263 (ret) = strtok_r(str, sep, &saveptr); \
264 if ((ret) == NULL) return false; \
267 #define DNS_PARSE_UINT(ret, str, sep, saveptr) do { \
268 char *istr = strtok_r(str, sep, &saveptr); \
269 if ((istr) == NULL) return false; \
270 (ret) = strtoul(istr, NULL, 10); \
274 parse a record from bind9
276 static bool b9_parse(struct dlz_bind9_data *state,
277 const char *rdatastr,
278 struct dnsp_DnssrvRpcRecord *rec)
280 char *full_name, *dclass, *type;
281 char *str, *tmp, *saveptr=NULL;
284 str = talloc_strdup(rec, rdatastr);
289 /* parse the SDLZ string form */
290 DNS_PARSE_STR(full_name, str, "\t", saveptr);
291 DNS_PARSE_UINT(rec->dwTtlSeconds, NULL, "\t", saveptr);
292 DNS_PARSE_STR(dclass, NULL, "\t", saveptr);
293 DNS_PARSE_STR(type, NULL, "\t", saveptr);
295 /* construct the record */
296 for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
297 if (strcasecmp(type, dns_typemap[i].typestr) == 0) {
298 rec->wType = dns_typemap[i].dns_type;
302 if (i == ARRAY_SIZE(dns_typemap)) {
303 state->log(ISC_LOG_ERROR, "samba_dlz: unsupported record type '%s' for '%s'",
308 switch (rec->wType) {
310 DNS_PARSE_STR(rec->data.ipv4, NULL, " ", saveptr);
314 DNS_PARSE_STR(rec->data.ipv6, NULL, " ", saveptr);
318 DNS_PARSE_STR(rec->data.cname, NULL, " ", saveptr);
322 rec->data.txt.count = 0;
323 rec->data.txt.str = talloc_array(rec, const char *, rec->data.txt.count);
324 tmp = strtok_r(NULL, "\t", &saveptr);
326 rec->data.txt.str = talloc_realloc(rec, rec->data.txt.str, const char *,
327 rec->data.txt.count+1);
330 rec->data.txt.str[rec->data.txt.count] = talloc_strndup(rec, &tmp[1], strlen(tmp)-2);
332 rec->data.txt.str[rec->data.txt.count] = talloc_strdup(rec, tmp);
334 rec->data.txt.count++;
335 tmp = strtok_r(NULL, " ", &saveptr);
340 DNS_PARSE_STR(rec->data.ptr, NULL, " ", saveptr);
344 DNS_PARSE_UINT(rec->data.srv.wPriority, NULL, " ", saveptr);
345 DNS_PARSE_UINT(rec->data.srv.wWeight, NULL, " ", saveptr);
346 DNS_PARSE_UINT(rec->data.srv.wPort, NULL, " ", saveptr);
347 DNS_PARSE_STR(rec->data.srv.nameTarget, NULL, " ", saveptr);
351 DNS_PARSE_UINT(rec->data.mx.wPriority, NULL, " ", saveptr);
352 DNS_PARSE_STR(rec->data.mx.nameTarget, NULL, " ", saveptr);
356 DNS_PARSE_STR(rec->data.hinfo.cpu, NULL, " ", saveptr);
357 DNS_PARSE_STR(rec->data.hinfo.os, NULL, " ", saveptr);
361 DNS_PARSE_STR(rec->data.ns, NULL, " ", saveptr);
365 DNS_PARSE_STR(rec->data.soa.mname, NULL, " ", saveptr);
366 DNS_PARSE_STR(rec->data.soa.rname, NULL, " ", saveptr);
367 DNS_PARSE_UINT(rec->data.soa.serial, NULL, " ", saveptr);
368 DNS_PARSE_UINT(rec->data.soa.refresh, NULL, " ", saveptr);
369 DNS_PARSE_UINT(rec->data.soa.retry, NULL, " ", saveptr);
370 DNS_PARSE_UINT(rec->data.soa.expire, NULL, " ", saveptr);
371 DNS_PARSE_UINT(rec->data.soa.minimum, NULL, " ", saveptr);
375 state->log(ISC_LOG_ERROR, "samba b9_parse: unhandled record type %u",
380 /* we should be at the end of the buffer now */
381 if (strtok_r(NULL, "\t ", &saveptr) != NULL) {
382 state->log(ISC_LOG_ERROR, "samba b9_parse: unexpected data at end of string for '%s'",
391 send a resource record to bind9
393 static isc_result_t b9_putrr(struct dlz_bind9_data *state,
394 void *handle, struct dnsp_DnssrvRpcRecord *rec,
398 const char *type, *data;
399 TALLOC_CTX *tmp_ctx = talloc_new(state);
401 if (!b9_format(state, tmp_ctx, rec, &type, &data)) {
402 return ISC_R_FAILURE;
406 talloc_free(tmp_ctx);
407 return ISC_R_NOMEMORY;
412 for (i=0; types[i]; i++) {
413 if (strcmp(types[i], type) == 0) break;
415 if (types[i] == NULL) {
417 return ISC_R_SUCCESS;
421 result = state->putrr(handle, type, rec->dwTtlSeconds, data);
422 if (result != ISC_R_SUCCESS) {
423 state->log(ISC_LOG_ERROR, "Failed to put rr");
425 talloc_free(tmp_ctx);
431 send a named resource record to bind9
433 static isc_result_t b9_putnamedrr(struct dlz_bind9_data *state,
434 void *handle, const char *name,
435 struct dnsp_DnssrvRpcRecord *rec)
438 const char *type, *data;
439 TALLOC_CTX *tmp_ctx = talloc_new(state);
441 if (!b9_format(state, tmp_ctx, rec, &type, &data)) {
442 return ISC_R_FAILURE;
446 talloc_free(tmp_ctx);
447 return ISC_R_NOMEMORY;
450 result = state->putnamedrr(handle, name, type, rec->dwTtlSeconds, data);
451 if (result != ISC_R_SUCCESS) {
452 state->log(ISC_LOG_ERROR, "Failed to put named rr '%s'", name);
454 talloc_free(tmp_ctx);
461 static isc_result_t parse_options(struct dlz_bind9_data *state,
462 unsigned int argc, char *argv[],
463 struct b9_options *options)
467 struct poptOption long_options[] = {
468 { "url", 'H', POPT_ARG_STRING, &options->url, 0, "database URL", "URL" },
469 { "debug", 'd', POPT_ARG_STRING, &options->debug, 0, "debug level", "DEBUG" },
473 pc = poptGetContext("dlz_bind9", argc, (const char **)argv, long_options,
474 POPT_CONTEXT_KEEP_FIRST);
475 while ((opt = poptGetNextOpt(pc)) != -1) {
478 state->log(ISC_LOG_ERROR, "dlz_bind9: Invalid option %s: %s",
479 poptBadOption(pc, 0), poptStrerror(opt));
480 return ISC_R_FAILURE;
484 return ISC_R_SUCCESS;
489 * Create session info from PAC
490 * This is called as auth_context->generate_session_info_pac()
492 static NTSTATUS b9_generate_session_info_pac(struct auth4_context *auth_context,
494 struct smb_krb5_context *smb_krb5_context,
496 const char *principal_name,
497 const struct tsocket_address *remote_addr,
498 uint32_t session_info_flags,
499 struct auth_session_info **session_info)
502 struct auth_user_info_dc *user_info_dc;
505 tmp_ctx = talloc_new(mem_ctx);
506 NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
508 status = kerberos_pac_blob_to_user_info_dc(tmp_ctx,
510 smb_krb5_context->krb5_context,
514 if (!NT_STATUS_IS_OK(status)) {
515 talloc_free(tmp_ctx);
519 if (user_info_dc->info->authenticated) {
520 session_info_flags |= AUTH_SESSION_INFO_AUTHENTICATED;
523 session_info_flags |= AUTH_SESSION_INFO_SIMPLE_PRIVILEGES;
525 status = auth_generate_session_info(mem_ctx, NULL, NULL, user_info_dc,
526 session_info_flags, session_info);
527 if (!NT_STATUS_IS_OK(status)) {
528 talloc_free(tmp_ctx);
532 talloc_free(tmp_ctx);
536 /* Callback for the DEBUG() system, to catch the remaining messages */
537 static void b9_debug(void *private_ptr, int msg_level, const char *msg)
539 static const int isc_log_map[] = {
540 ISC_LOG_CRITICAL, /* 0 */
541 ISC_LOG_ERROR, /* 1 */
542 ISC_LOG_WARNING, /* 2 */
543 ISC_LOG_NOTICE /* 3 */
545 struct dlz_bind9_data *state = private_ptr;
548 if (msg_level >= ARRAY_SIZE(isc_log_map) || msg_level < 0) {
549 isc_log_level = ISC_LOG_INFO;
551 isc_log_level = isc_log_map[msg_level];
553 state->log(isc_log_level, "samba_dlz: %s", msg);
556 static int dlz_state_debug_unregister(struct dlz_bind9_data *state)
558 /* Stop logging (to the bind9 logs) */
559 debug_set_callback(NULL, NULL);
564 called to initialise the driver
566 _PUBLIC_ isc_result_t dlz_create(const char *dlzname,
567 unsigned int argc, char *argv[],
570 struct dlz_bind9_data *state;
571 const char *helper_name;
577 if (dlz_bind9_state != NULL) {
578 *dbdata = dlz_bind9_state;
579 dlz_bind9_state_ref_count++;
580 return ISC_R_SUCCESS;
583 state = talloc_zero(NULL, struct dlz_bind9_data);
585 return ISC_R_NOMEMORY;
588 talloc_set_destructor(state, dlz_state_debug_unregister);
590 /* fill in the helper functions */
591 va_start(ap, dbdata);
592 while ((helper_name = va_arg(ap, const char *)) != NULL) {
593 b9_add_helper(state, helper_name, va_arg(ap, void*));
597 /* Do not install samba signal handlers */
598 fault_setup_disable();
600 /* Start logging (to the bind9 logs) */
601 debug_set_callback(state, b9_debug);
603 state->ev_ctx = s4_event_context_init(state);
604 if (state->ev_ctx == NULL) {
605 result = ISC_R_NOMEMORY;
609 result = parse_options(state, argc, argv, &state->options);
610 if (result != ISC_R_SUCCESS) {
614 state->lp = loadparm_init_global(true);
615 if (state->lp == NULL) {
616 result = ISC_R_NOMEMORY;
620 if (state->options.debug) {
621 lpcfg_do_global_parameter(state->lp, "log level", state->options.debug);
623 lpcfg_do_global_parameter(state->lp, "log level", "0");
626 if (smb_krb5_init_context(state, state->ev_ctx, state->lp, &state->smb_krb5_ctx) != 0) {
627 result = ISC_R_NOMEMORY;
631 nt_status = gensec_init();
632 if (!NT_STATUS_IS_OK(nt_status)) {
633 result = ISC_R_NOMEMORY;
637 state->auth_context = talloc_zero(state, struct auth4_context);
638 if (state->auth_context == NULL) {
639 result = ISC_R_NOMEMORY;
643 if (state->options.url == NULL) {
644 state->options.url = lpcfg_private_path(state, state->lp, "dns/sam.ldb");
645 if (state->options.url == NULL) {
646 result = ISC_R_NOMEMORY;
651 state->samdb = samdb_connect_url(state, state->ev_ctx, state->lp,
652 system_session(state->lp), 0, state->options.url);
653 if (state->samdb == NULL) {
654 state->log(ISC_LOG_ERROR, "samba_dlz: Failed to connect to %s",
656 result = ISC_R_FAILURE;
660 dn = ldb_get_default_basedn(state->samdb);
662 state->log(ISC_LOG_ERROR, "samba_dlz: Unable to get basedn for %s - %s",
663 state->options.url, ldb_errstring(state->samdb));
664 result = ISC_R_FAILURE;
668 state->log(ISC_LOG_INFO, "samba_dlz: started for DN %s",
669 ldb_dn_get_linearized(dn));
671 state->auth_context->event_ctx = state->ev_ctx;
672 state->auth_context->lp_ctx = state->lp;
673 state->auth_context->sam_ctx = state->samdb;
674 state->auth_context->generate_session_info_pac = b9_generate_session_info_pac;
677 dlz_bind9_state = state;
678 dlz_bind9_state_ref_count++;
680 return ISC_R_SUCCESS;
690 _PUBLIC_ void dlz_destroy(void *dbdata)
692 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
693 state->log(ISC_LOG_INFO, "samba_dlz: shutting down");
695 dlz_bind9_state_ref_count--;
696 if (dlz_bind9_state_ref_count == 0) {
697 talloc_unlink(state, state->samdb);
699 dlz_bind9_state = NULL;
705 return the base DN for a zone
707 static isc_result_t b9_find_zone_dn(struct dlz_bind9_data *state, const char *zone_name,
708 TALLOC_CTX *mem_ctx, struct ldb_dn **zone_dn)
711 TALLOC_CTX *tmp_ctx = talloc_new(state);
712 const char *attrs[] = { NULL };
715 for (i=0; zone_prefixes[i]; i++) {
717 struct ldb_result *res;
719 dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
721 talloc_free(tmp_ctx);
722 return ISC_R_NOMEMORY;
725 if (!ldb_dn_add_child_fmt(dn, "DC=%s,%s", zone_name, zone_prefixes[i])) {
726 talloc_free(tmp_ctx);
727 return ISC_R_NOMEMORY;
730 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsZone");
731 if (ret == LDB_SUCCESS) {
732 if (zone_dn != NULL) {
733 *zone_dn = talloc_steal(mem_ctx, dn);
735 talloc_free(tmp_ctx);
736 return ISC_R_SUCCESS;
741 talloc_free(tmp_ctx);
742 return ISC_R_NOTFOUND;
747 return the DN for a name. The record does not need to exist, but the
750 static isc_result_t b9_find_name_dn(struct dlz_bind9_data *state, const char *name,
751 TALLOC_CTX *mem_ctx, struct ldb_dn **dn)
755 /* work through the name piece by piece, until we find a zone */
758 result = b9_find_zone_dn(state, p, mem_ctx, dn);
759 if (result == ISC_R_SUCCESS) {
760 /* we found a zone, now extend the DN to get
765 ret = ldb_dn_add_child_fmt(*dn, "DC=@");
767 ret = ldb_dn_add_child_fmt(*dn, "DC=%.*s", (int)(p-name)-1, name);
771 return ISC_R_NOMEMORY;
773 return ISC_R_SUCCESS;
781 return ISC_R_NOTFOUND;
786 see if we handle a given zone
788 _PUBLIC_ isc_result_t dlz_findzonedb(void *dbdata, const char *name)
790 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
791 return b9_find_zone_dn(state, name, NULL, NULL);
798 static isc_result_t dlz_lookup_types(struct dlz_bind9_data *state,
799 const char *zone, const char *name,
800 dns_sdlzlookup_t *lookup,
803 TALLOC_CTX *tmp_ctx = talloc_new(state);
804 const char *attrs[] = { "dnsRecord", NULL };
805 int ret = LDB_SUCCESS, i;
806 struct ldb_result *res;
807 struct ldb_message_element *el;
810 for (i=0; zone_prefixes[i]; i++) {
811 dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
813 talloc_free(tmp_ctx);
814 return ISC_R_NOMEMORY;
817 if (!ldb_dn_add_child_fmt(dn, "DC=%s,DC=%s,%s", name, zone, zone_prefixes[i])) {
818 talloc_free(tmp_ctx);
819 return ISC_R_NOMEMORY;
822 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
823 attrs, "objectClass=dnsNode");
824 if (ret == LDB_SUCCESS) {
828 if (ret != LDB_SUCCESS || res->count == 0) {
829 talloc_free(tmp_ctx);
830 return ISC_R_NOTFOUND;
833 el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
834 if (el == NULL || el->num_values == 0) {
835 talloc_free(tmp_ctx);
836 return ISC_R_NOTFOUND;
839 for (i=0; i<el->num_values; i++) {
840 struct dnsp_DnssrvRpcRecord rec;
841 enum ndr_err_code ndr_err;
844 ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec,
845 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
846 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
847 state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
848 ldb_dn_get_linearized(dn));
849 talloc_free(tmp_ctx);
850 return ISC_R_FAILURE;
853 result = b9_putrr(state, lookup, &rec, types);
854 if (result != ISC_R_SUCCESS) {
855 talloc_free(tmp_ctx);
860 talloc_free(tmp_ctx);
861 return ISC_R_SUCCESS;
867 #ifdef BIND_VERSION_9_8
868 _PUBLIC_ isc_result_t dlz_lookup(const char *zone, const char *name,
869 void *dbdata, dns_sdlzlookup_t *lookup)
871 _PUBLIC_ isc_result_t dlz_lookup(const char *zone, const char *name,
872 void *dbdata, dns_sdlzlookup_t *lookup,
873 dns_clientinfomethods_t *methods,
874 dns_clientinfo_t *clientinfo)
877 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
878 return dlz_lookup_types(state, zone, name, lookup, NULL);
883 see if a zone transfer is allowed
885 _PUBLIC_ isc_result_t dlz_allowzonexfr(void *dbdata, const char *name, const char *client)
887 /* just say yes for all our zones for now */
888 return dlz_findzonedb(dbdata, name);
892 perform a zone transfer
894 _PUBLIC_ isc_result_t dlz_allnodes(const char *zone, void *dbdata,
895 dns_sdlzallnodes_t *allnodes)
897 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
898 const char *attrs[] = { "dnsRecord", NULL };
899 int ret = LDB_SUCCESS, i, j;
901 struct ldb_result *res;
902 TALLOC_CTX *tmp_ctx = talloc_new(state);
904 for (i=0; zone_prefixes[i]; i++) {
905 dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
907 talloc_free(tmp_ctx);
908 return ISC_R_NOMEMORY;
911 if (!ldb_dn_add_child_fmt(dn, "DC=%s,%s", zone, zone_prefixes[i])) {
912 talloc_free(tmp_ctx);
913 return ISC_R_NOMEMORY;
916 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_SUBTREE,
917 attrs, "objectClass=dnsNode");
918 if (ret == LDB_SUCCESS) {
922 if (ret != LDB_SUCCESS) {
923 talloc_free(tmp_ctx);
924 return ISC_R_NOTFOUND;
927 for (i=0; i<res->count; i++) {
928 struct ldb_message_element *el;
929 TALLOC_CTX *el_ctx = talloc_new(tmp_ctx);
930 const char *rdn, *name;
931 const struct ldb_val *v;
933 el = ldb_msg_find_element(res->msgs[i], "dnsRecord");
934 if (el == NULL || el->num_values == 0) {
935 state->log(ISC_LOG_INFO, "failed to find dnsRecord for %s",
936 ldb_dn_get_linearized(dn));
941 v = ldb_dn_get_rdn_val(res->msgs[i]->dn);
943 state->log(ISC_LOG_INFO, "failed to find RDN for %s",
944 ldb_dn_get_linearized(dn));
949 rdn = talloc_strndup(el_ctx, (char *)v->data, v->length);
951 talloc_free(tmp_ctx);
952 return ISC_R_NOMEMORY;
955 if (strcmp(rdn, "@") == 0) {
958 name = talloc_asprintf(el_ctx, "%s.%s", rdn, zone);
961 talloc_free(tmp_ctx);
962 return ISC_R_NOMEMORY;
965 for (j=0; j<el->num_values; j++) {
966 struct dnsp_DnssrvRpcRecord rec;
967 enum ndr_err_code ndr_err;
970 ndr_err = ndr_pull_struct_blob(&el->values[j], el_ctx, &rec,
971 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
972 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
973 state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
974 ldb_dn_get_linearized(dn));
978 result = b9_putnamedrr(state, allnodes, name, &rec);
979 if (result != ISC_R_SUCCESS) {
985 talloc_free(tmp_ctx);
987 return ISC_R_SUCCESS;
994 _PUBLIC_ isc_result_t dlz_newversion(const char *zone, void *dbdata, void **versionp)
996 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
998 state->log(ISC_LOG_INFO, "samba_dlz: starting transaction on zone %s", zone);
1000 if (state->transaction_token != NULL) {
1001 state->log(ISC_LOG_INFO, "samba_dlz: transaction already started for zone %s", zone);
1002 return ISC_R_FAILURE;
1005 state->transaction_token = talloc_zero(state, int);
1006 if (state->transaction_token == NULL) {
1007 return ISC_R_NOMEMORY;
1010 if (ldb_transaction_start(state->samdb) != LDB_SUCCESS) {
1011 state->log(ISC_LOG_INFO, "samba_dlz: failed to start a transaction for zone %s", zone);
1012 talloc_free(state->transaction_token);
1013 state->transaction_token = NULL;
1014 return ISC_R_FAILURE;
1017 *versionp = (void *)state->transaction_token;
1019 return ISC_R_SUCCESS;
1025 _PUBLIC_ void dlz_closeversion(const char *zone, isc_boolean_t commit,
1026 void *dbdata, void **versionp)
1028 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
1030 if (state->transaction_token != (int *)*versionp) {
1031 state->log(ISC_LOG_INFO, "samba_dlz: transaction not started for zone %s", zone);
1036 if (ldb_transaction_commit(state->samdb) != LDB_SUCCESS) {
1037 state->log(ISC_LOG_INFO, "samba_dlz: failed to commit a transaction for zone %s", zone);
1040 state->log(ISC_LOG_INFO, "samba_dlz: committed transaction on zone %s", zone);
1042 if (ldb_transaction_cancel(state->samdb) != LDB_SUCCESS) {
1043 state->log(ISC_LOG_INFO, "samba_dlz: failed to cancel a transaction for zone %s", zone);
1046 state->log(ISC_LOG_INFO, "samba_dlz: cancelling transaction on zone %s", zone);
1049 talloc_free(state->transaction_token);
1050 state->transaction_token = NULL;
1056 see if there is a SOA record for a zone
1058 static bool b9_has_soa(struct dlz_bind9_data *state, struct ldb_dn *dn, const char *zone)
1060 const char *attrs[] = { "dnsRecord", NULL };
1061 struct ldb_result *res;
1062 struct ldb_message_element *el;
1063 TALLOC_CTX *tmp_ctx = talloc_new(state);
1066 if (!ldb_dn_add_child_fmt(dn, "DC=@,DC=%s", zone)) {
1067 talloc_free(tmp_ctx);
1071 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
1072 attrs, "objectClass=dnsNode");
1073 if (ret != LDB_SUCCESS) {
1074 talloc_free(tmp_ctx);
1078 el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
1080 talloc_free(tmp_ctx);
1083 for (i=0; i<el->num_values; i++) {
1084 struct dnsp_DnssrvRpcRecord rec;
1085 enum ndr_err_code ndr_err;
1087 ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec,
1088 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
1089 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1092 if (rec.wType == DNS_TYPE_SOA) {
1093 talloc_free(tmp_ctx);
1098 talloc_free(tmp_ctx);
1103 configure a writeable zone
1105 _PUBLIC_ isc_result_t dlz_configure(dns_view_t *view, void *dbdata)
1107 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
1108 TALLOC_CTX *tmp_ctx;
1112 state->log(ISC_LOG_INFO, "samba_dlz: starting configure");
1113 if (state->writeable_zone == NULL) {
1114 state->log(ISC_LOG_INFO, "samba_dlz: no writeable_zone method available");
1115 return ISC_R_FAILURE;
1118 tmp_ctx = talloc_new(state);
1120 for (i=0; zone_prefixes[i]; i++) {
1121 const char *attrs[] = { "name", NULL };
1123 struct ldb_result *res;
1125 dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
1127 talloc_free(tmp_ctx);
1128 return ISC_R_NOMEMORY;
1131 if (!ldb_dn_add_child_fmt(dn, "%s", zone_prefixes[i])) {
1132 talloc_free(tmp_ctx);
1133 return ISC_R_NOMEMORY;
1136 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_SUBTREE,
1137 attrs, "objectClass=dnsZone");
1138 if (ret != LDB_SUCCESS) {
1142 for (j=0; j<res->count; j++) {
1143 isc_result_t result;
1144 const char *zone = ldb_msg_find_attr_as_string(res->msgs[j], "name", NULL);
1145 struct ldb_dn *zone_dn;
1150 /* Ignore zones that are not handled in BIND */
1151 if ((strcmp(zone, "RootDNSServers") == 0) ||
1152 (strcmp(zone, "..TrustAnchors") == 0)) {
1155 zone_dn = ldb_dn_copy(tmp_ctx, dn);
1156 if (zone_dn == NULL) {
1157 talloc_free(tmp_ctx);
1158 return ISC_R_NOMEMORY;
1161 if (!b9_has_soa(state, zone_dn, zone)) {
1164 result = state->writeable_zone(view, zone);
1165 if (result != ISC_R_SUCCESS) {
1166 state->log(ISC_LOG_ERROR, "samba_dlz: Failed to configure zone '%s'",
1168 talloc_free(tmp_ctx);
1171 state->log(ISC_LOG_INFO, "samba_dlz: configured writeable zone '%s'", zone);
1175 talloc_free(tmp_ctx);
1176 return ISC_R_SUCCESS;
1180 authorize a zone update
1182 _PUBLIC_ isc_boolean_t dlz_ssumatch(const char *signer, const char *name, const char *tcpaddr,
1183 const char *type, const char *key, uint32_t keydatalen, uint8_t *keydata,
1186 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
1187 TALLOC_CTX *tmp_ctx;
1189 struct cli_credentials *server_credentials;
1194 struct gensec_security *gensec_ctx;
1195 struct auth_session_info *session_info;
1197 isc_result_t result;
1198 struct ldb_result *res;
1199 const char * attrs[] = { NULL };
1200 uint32_t access_mask;
1202 /* Remove cached credentials, if any */
1203 if (state->session_info) {
1204 talloc_free(state->session_info);
1205 state->session_info = NULL;
1207 if (state->update_name) {
1208 talloc_free(state->update_name);
1209 state->update_name = NULL;
1212 tmp_ctx = talloc_new(NULL);
1213 if (tmp_ctx == NULL) {
1214 state->log(ISC_LOG_ERROR, "samba_dlz: no memory");
1218 ap_req = data_blob_const(keydata, keydatalen);
1219 server_credentials = cli_credentials_init(tmp_ctx);
1220 if (!server_credentials) {
1221 state->log(ISC_LOG_ERROR, "samba_dlz: failed to init server credentials");
1222 talloc_free(tmp_ctx);
1226 cli_credentials_set_krb5_context(server_credentials, state->smb_krb5_ctx);
1227 cli_credentials_set_conf(server_credentials, state->lp);
1229 keytab_name = talloc_asprintf(tmp_ctx, "file:%s/dns.keytab",
1230 lpcfg_private_dir(state->lp));
1231 ret = cli_credentials_set_keytab_name(server_credentials, state->lp, keytab_name,
1234 state->log(ISC_LOG_ERROR, "samba_dlz: failed to obtain server credentials from %s",
1236 talloc_free(tmp_ctx);
1239 talloc_free(keytab_name);
1241 nt_status = gensec_server_start(tmp_ctx,
1242 lpcfg_gensec_settings(tmp_ctx, state->lp),
1243 state->auth_context, &gensec_ctx);
1244 if (!NT_STATUS_IS_OK(nt_status)) {
1245 state->log(ISC_LOG_ERROR, "samba_dlz: failed to start gensec server");
1246 talloc_free(tmp_ctx);
1250 gensec_set_credentials(gensec_ctx, server_credentials);
1252 nt_status = gensec_start_mech_by_name(gensec_ctx, "spnego");
1253 if (!NT_STATUS_IS_OK(nt_status)) {
1254 state->log(ISC_LOG_ERROR, "samba_dlz: failed to start spnego");
1255 talloc_free(tmp_ctx);
1259 nt_status = gensec_update(gensec_ctx, tmp_ctx, state->ev_ctx, ap_req, &ap_req);
1260 if (!NT_STATUS_IS_OK(nt_status)) {
1261 state->log(ISC_LOG_ERROR, "samba_dlz: spnego update failed");
1262 talloc_free(tmp_ctx);
1266 nt_status = gensec_session_info(gensec_ctx, tmp_ctx, &session_info);
1267 if (!NT_STATUS_IS_OK(nt_status)) {
1268 state->log(ISC_LOG_ERROR, "samba_dlz: failed to create session info");
1269 talloc_free(tmp_ctx);
1273 /* Get the DN from name */
1274 result = b9_find_name_dn(state, name, tmp_ctx, &dn);
1275 if (result != ISC_R_SUCCESS) {
1276 state->log(ISC_LOG_ERROR, "samba_dlz: failed to find name %s", name);
1277 talloc_free(tmp_ctx);
1281 /* make sure the dn exists, or find parent dn in case new object is being added */
1282 ldb_ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
1283 attrs, "objectClass=dnsNode");
1284 if (ldb_ret == LDB_ERR_NO_SUCH_OBJECT) {
1285 ldb_dn_remove_child_components(dn, 1);
1286 access_mask = SEC_ADS_CREATE_CHILD;
1288 } else if (ldb_ret == LDB_SUCCESS) {
1289 access_mask = SEC_STD_REQUIRED | SEC_ADS_SELF_WRITE;
1292 talloc_free(tmp_ctx);
1297 ldb_ret = dsdb_check_access_on_dn(state->samdb, tmp_ctx, dn,
1298 session_info->security_token,
1300 if (ldb_ret != LDB_SUCCESS) {
1301 state->log(ISC_LOG_INFO,
1302 "samba_dlz: disallowing update of signer=%s name=%s type=%s error=%s",
1303 signer, name, type, ldb_strerror(ldb_ret));
1304 talloc_free(tmp_ctx);
1308 /* Cache session_info, so it can be used in the actual add/delete operation */
1309 state->update_name = talloc_strdup(state, name);
1310 if (state->update_name == NULL) {
1311 state->log(ISC_LOG_ERROR, "samba_dlz: memory allocation error");
1312 talloc_free(tmp_ctx);
1315 state->session_info = talloc_steal(state, session_info);
1317 state->log(ISC_LOG_INFO, "samba_dlz: allowing update of signer=%s name=%s tcpaddr=%s type=%s key=%s",
1318 signer, name, tcpaddr, type, key);
1320 talloc_free(tmp_ctx);
1328 static isc_result_t b9_add_record(struct dlz_bind9_data *state, const char *name,
1330 struct dnsp_DnssrvRpcRecord *rec)
1332 struct ldb_message *msg;
1333 enum ndr_err_code ndr_err;
1337 msg = ldb_msg_new(rec);
1339 return ISC_R_NOMEMORY;
1342 ret = ldb_msg_add_string(msg, "objectClass", "dnsNode");
1343 if (ret != LDB_SUCCESS) {
1344 return ISC_R_FAILURE;
1347 ndr_err = ndr_push_struct_blob(&v, rec, rec, (ndr_push_flags_fn_t)ndr_push_dnsp_DnssrvRpcRecord);
1348 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1349 return ISC_R_FAILURE;
1351 ret = ldb_msg_add_value(msg, "dnsRecord", &v, NULL);
1352 if (ret != LDB_SUCCESS) {
1353 return ISC_R_FAILURE;
1356 ret = ldb_add(state->samdb, msg);
1357 if (ret != LDB_SUCCESS) {
1358 return ISC_R_FAILURE;
1361 return ISC_R_SUCCESS;
1365 see if two DNS names are the same
1367 static bool dns_name_equal(const char *name1, const char *name2)
1369 size_t len1 = strlen(name1);
1370 size_t len2 = strlen(name2);
1371 if (name1[len1-1] == '.') len1--;
1372 if (name2[len2-1] == '.') len2--;
1376 return strncasecmp_m(name1, name2, len1) == 0;
1381 see if two dns records match
1383 static bool b9_record_match(struct dlz_bind9_data *state,
1384 struct dnsp_DnssrvRpcRecord *rec1, struct dnsp_DnssrvRpcRecord *rec2)
1389 if (rec1->wType != rec2->wType) {
1392 /* see if this type is single valued */
1393 if (b9_single_valued(rec1->wType)) {
1397 /* see if the data matches */
1398 switch (rec1->wType) {
1400 return strcmp(rec1->data.ipv4, rec2->data.ipv4) == 0;
1402 return strcmp(rec1->data.ipv6, rec2->data.ipv6) == 0;
1403 case DNS_TYPE_CNAME:
1404 return dns_name_equal(rec1->data.cname, rec2->data.cname);
1406 status = (rec1->data.txt.count == rec2->data.txt.count);
1407 if (!status) return status;
1408 for (i=0; i<rec1->data.txt.count; i++) {
1409 status &= (strcmp(rec1->data.txt.str[i], rec2->data.txt.str[i]) == 0);
1413 return dns_name_equal(rec1->data.ptr, rec2->data.ptr);
1415 return dns_name_equal(rec1->data.ns, rec2->data.ns);
1418 return rec1->data.srv.wPriority == rec2->data.srv.wPriority &&
1419 rec1->data.srv.wWeight == rec2->data.srv.wWeight &&
1420 rec1->data.srv.wPort == rec2->data.srv.wPort &&
1421 dns_name_equal(rec1->data.srv.nameTarget, rec2->data.srv.nameTarget);
1424 return rec1->data.mx.wPriority == rec2->data.mx.wPriority &&
1425 dns_name_equal(rec1->data.mx.nameTarget, rec2->data.mx.nameTarget);
1427 case DNS_TYPE_HINFO:
1428 return strcmp(rec1->data.hinfo.cpu, rec2->data.hinfo.cpu) == 0 &&
1429 strcmp(rec1->data.hinfo.os, rec2->data.hinfo.os) == 0;
1432 return dns_name_equal(rec1->data.soa.mname, rec2->data.soa.mname) &&
1433 dns_name_equal(rec1->data.soa.rname, rec2->data.soa.rname) &&
1434 rec1->data.soa.serial == rec2->data.soa.serial &&
1435 rec1->data.soa.refresh == rec2->data.soa.refresh &&
1436 rec1->data.soa.retry == rec2->data.soa.retry &&
1437 rec1->data.soa.expire == rec2->data.soa.expire &&
1438 rec1->data.soa.minimum == rec2->data.soa.minimum;
1440 state->log(ISC_LOG_ERROR, "samba b9_putrr: unhandled record type %u",
1449 * Update session_info on samdb using the cached credentials
1451 static bool b9_set_session_info(struct dlz_bind9_data *state, const char *name)
1455 if (state->update_name == NULL || state->session_info == NULL) {
1456 state->log(ISC_LOG_ERROR, "samba_dlz: invalid credentials");
1460 /* Do not use client credentials, if we're not updating the client specified name */
1461 if (strcmp(state->update_name, name) != 0) {
1465 ret = ldb_set_opaque(state->samdb, "sessionInfo", state->session_info);
1466 if (ret != LDB_SUCCESS) {
1467 state->log(ISC_LOG_ERROR, "samba_dlz: unable to set session info");
1475 * Reset session_info on samdb as system session
1477 static void b9_reset_session_info(struct dlz_bind9_data *state)
1479 ldb_set_opaque(state->samdb, "sessionInfo", system_session(state->lp));
1483 add or modify a rdataset
1485 _PUBLIC_ isc_result_t dlz_addrdataset(const char *name, const char *rdatastr, void *dbdata, void *version)
1487 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
1488 struct dnsp_DnssrvRpcRecord *rec;
1490 isc_result_t result;
1491 struct ldb_result *res;
1492 const char *attrs[] = { "dnsRecord", NULL };
1494 struct ldb_message_element *el;
1495 enum ndr_err_code ndr_err;
1498 if (state->transaction_token != (void*)version) {
1499 state->log(ISC_LOG_INFO, "samba_dlz: bad transaction version");
1500 return ISC_R_FAILURE;
1503 rec = talloc_zero(state, struct dnsp_DnssrvRpcRecord);
1505 return ISC_R_NOMEMORY;
1508 unix_to_nt_time(&t, time(NULL));
1509 t /= 10*1000*1000; /* convert to seconds (NT time is in 100ns units) */
1510 t /= 3600; /* convert to hours */
1512 rec->rank = DNS_RANK_ZONE;
1513 rec->dwSerial = state->soa_serial;
1514 rec->dwTimeStamp = (uint32_t)t;
1516 if (!b9_parse(state, rdatastr, rec)) {
1517 state->log(ISC_LOG_INFO, "samba_dlz: failed to parse rdataset '%s'", rdatastr);
1519 return ISC_R_FAILURE;
1522 /* find the DN of the record */
1523 result = b9_find_name_dn(state, name, rec, &dn);
1524 if (result != ISC_R_SUCCESS) {
1529 /* get any existing records */
1530 ret = ldb_search(state->samdb, rec, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
1531 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
1532 if (!b9_set_session_info(state, name)) {
1534 return ISC_R_FAILURE;
1536 result = b9_add_record(state, name, dn, rec);
1537 b9_reset_session_info(state);
1539 if (result == ISC_R_SUCCESS) {
1540 state->log(ISC_LOG_INFO, "samba_dlz: added %s %s", name, rdatastr);
1545 el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
1547 ret = ldb_msg_add_empty(res->msgs[0], "dnsRecord", LDB_FLAG_MOD_ADD, &el);
1548 if (ret != LDB_SUCCESS) {
1549 state->log(ISC_LOG_ERROR, "samba_dlz: failed to add dnsRecord for %s",
1550 ldb_dn_get_linearized(dn));
1552 return ISC_R_FAILURE;
1556 /* there are existing records. We need to see if this will
1557 * replace a record or add to it
1559 for (i=0; i<el->num_values; i++) {
1560 struct dnsp_DnssrvRpcRecord rec2;
1562 ndr_err = ndr_pull_struct_blob(&el->values[i], rec, &rec2,
1563 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
1564 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1565 state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
1566 ldb_dn_get_linearized(dn));
1568 return ISC_R_FAILURE;
1571 if (b9_record_match(state, rec, &rec2)) {
1575 if (i == el->num_values) {
1576 /* adding a new value */
1577 el->values = talloc_realloc(el, el->values, struct ldb_val, el->num_values+1);
1578 if (el->values == NULL) {
1580 return ISC_R_NOMEMORY;
1585 ndr_err = ndr_push_struct_blob(&el->values[i], rec, rec,
1586 (ndr_push_flags_fn_t)ndr_push_dnsp_DnssrvRpcRecord);
1587 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1588 state->log(ISC_LOG_ERROR, "samba_dlz: failed to push dnsRecord for %s",
1589 ldb_dn_get_linearized(dn));
1591 return ISC_R_FAILURE;
1595 if (!b9_set_session_info(state, name)) {
1597 return ISC_R_FAILURE;
1600 /* modify the record */
1601 el->flags = LDB_FLAG_MOD_REPLACE;
1602 ret = ldb_modify(state->samdb, res->msgs[0]);
1603 b9_reset_session_info(state);
1604 if (ret != LDB_SUCCESS) {
1605 state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
1606 ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
1608 return ISC_R_FAILURE;
1611 state->log(ISC_LOG_INFO, "samba_dlz: added rdataset %s '%s'", name, rdatastr);
1614 return ISC_R_SUCCESS;
1620 _PUBLIC_ isc_result_t dlz_subrdataset(const char *name, const char *rdatastr, void *dbdata, void *version)
1622 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
1623 struct dnsp_DnssrvRpcRecord *rec;
1625 isc_result_t result;
1626 struct ldb_result *res;
1627 const char *attrs[] = { "dnsRecord", NULL };
1629 struct ldb_message_element *el;
1630 enum ndr_err_code ndr_err;
1632 if (state->transaction_token != (void*)version) {
1633 state->log(ISC_LOG_ERROR, "samba_dlz: bad transaction version");
1634 return ISC_R_FAILURE;
1637 rec = talloc_zero(state, struct dnsp_DnssrvRpcRecord);
1639 return ISC_R_NOMEMORY;
1642 if (!b9_parse(state, rdatastr, rec)) {
1643 state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse rdataset '%s'", rdatastr);
1645 return ISC_R_FAILURE;
1648 /* find the DN of the record */
1649 result = b9_find_name_dn(state, name, rec, &dn);
1650 if (result != ISC_R_SUCCESS) {
1655 /* get the existing records */
1656 ret = ldb_search(state->samdb, rec, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
1657 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
1659 return ISC_R_NOTFOUND;
1662 /* there are existing records. We need to see if any match
1664 el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
1665 if (el == NULL || el->num_values == 0) {
1666 state->log(ISC_LOG_ERROR, "samba_dlz: no dnsRecord attribute for %s",
1667 ldb_dn_get_linearized(dn));
1669 return ISC_R_FAILURE;
1672 for (i=0; i<el->num_values; i++) {
1673 struct dnsp_DnssrvRpcRecord rec2;
1675 ndr_err = ndr_pull_struct_blob(&el->values[i], rec, &rec2,
1676 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
1677 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1678 state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
1679 ldb_dn_get_linearized(dn));
1681 return ISC_R_FAILURE;
1684 if (b9_record_match(state, rec, &rec2)) {
1688 if (i == el->num_values) {
1690 return ISC_R_NOTFOUND;
1693 if (i < el->num_values-1) {
1694 memmove(&el->values[i], &el->values[i+1], sizeof(el->values[0])*((el->num_values-1)-i));
1698 if (!b9_set_session_info(state, name)) {
1700 return ISC_R_FAILURE;
1703 if (el->num_values == 0) {
1704 el->flags = LDB_FLAG_MOD_DELETE;
1706 el->flags = LDB_FLAG_MOD_REPLACE;
1708 ret = ldb_modify(state->samdb, res->msgs[0]);
1710 b9_reset_session_info(state);
1711 if (ret != LDB_SUCCESS) {
1712 state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
1713 ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
1715 return ISC_R_FAILURE;
1718 state->log(ISC_LOG_INFO, "samba_dlz: subtracted rdataset %s '%s'", name, rdatastr);
1721 return ISC_R_SUCCESS;
1726 delete all records of the given type
1728 _PUBLIC_ isc_result_t dlz_delrdataset(const char *name, const char *type, void *dbdata, void *version)
1730 struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
1731 TALLOC_CTX *tmp_ctx;
1733 isc_result_t result;
1734 struct ldb_result *res;
1735 const char *attrs[] = { "dnsRecord", NULL };
1737 struct ldb_message_element *el;
1738 enum ndr_err_code ndr_err;
1739 enum dns_record_type dns_type;
1742 if (state->transaction_token != (void*)version) {
1743 state->log(ISC_LOG_ERROR, "samba_dlz: bad transaction version");
1744 return ISC_R_FAILURE;
1747 if (!b9_dns_type(type, &dns_type)) {
1748 state->log(ISC_LOG_ERROR, "samba_dlz: bad dns type %s in delete", type);
1749 return ISC_R_FAILURE;
1752 tmp_ctx = talloc_new(state);
1754 /* find the DN of the record */
1755 result = b9_find_name_dn(state, name, tmp_ctx, &dn);
1756 if (result != ISC_R_SUCCESS) {
1757 talloc_free(tmp_ctx);
1761 /* get the existing records */
1762 ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
1763 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
1764 talloc_free(tmp_ctx);
1765 return ISC_R_NOTFOUND;
1768 /* there are existing records. We need to see if any match the type
1770 el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
1771 if (el == NULL || el->num_values == 0) {
1772 talloc_free(tmp_ctx);
1773 return ISC_R_NOTFOUND;
1776 for (i=0; i<el->num_values; i++) {
1777 struct dnsp_DnssrvRpcRecord rec2;
1779 ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec2,
1780 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
1781 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1782 state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
1783 ldb_dn_get_linearized(dn));
1784 talloc_free(tmp_ctx);
1785 return ISC_R_FAILURE;
1788 if (dns_type == rec2.wType) {
1789 if (i < el->num_values-1) {
1790 memmove(&el->values[i], &el->values[i+1],
1791 sizeof(el->values[0])*((el->num_values-1)-i));
1800 talloc_free(tmp_ctx);
1801 return ISC_R_FAILURE;
1804 if (!b9_set_session_info(state, name)) {
1805 talloc_free(tmp_ctx);
1806 return ISC_R_FAILURE;
1809 if (el->num_values == 0) {
1810 el->flags = LDB_FLAG_MOD_DELETE;
1812 el->flags = LDB_FLAG_MOD_REPLACE;
1814 ret = ldb_modify(state->samdb, res->msgs[0]);
1816 b9_reset_session_info(state);
1817 if (ret != LDB_SUCCESS) {
1818 state->log(ISC_LOG_ERROR, "samba_dlz: failed to delete type %s in %s - %s",
1819 type, ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
1820 talloc_free(tmp_ctx);
1821 return ISC_R_FAILURE;
1824 state->log(ISC_LOG_INFO, "samba_dlz: deleted rdataset %s of type %s", name, type);
1826 talloc_free(tmp_ctx);
1827 return ISC_R_SUCCESS;