2 Unix SMB/CIFS implementation.
6 Copyright (C) 2010 Kai Blin <kai@samba.org>
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/>.
23 #include "libcli/util/ntstatus.h"
24 #include "libcli/util/werror.h"
25 #include "librpc/ndr/libndr.h"
26 #include "librpc/gen_ndr/ndr_dns.h"
27 #include "librpc/gen_ndr/ndr_dnsp.h"
29 #include "dsdb/samdb/samdb.h"
30 #include "dsdb/common/util.h"
31 #include "dns_server/dns_server.h"
33 uint8_t werr_to_dns_err(WERROR werr
)
35 if (W_ERROR_EQUAL(WERR_OK
, werr
)) {
37 } else if (W_ERROR_EQUAL(DNS_ERR(FORMAT_ERROR
), werr
)) {
38 return DNS_RCODE_FORMERR
;
39 } else if (W_ERROR_EQUAL(DNS_ERR(SERVER_FAILURE
), werr
)) {
40 return DNS_RCODE_SERVFAIL
;
41 } else if (W_ERROR_EQUAL(DNS_ERR(NAME_ERROR
), werr
)) {
42 return DNS_RCODE_NXDOMAIN
;
43 } else if (W_ERROR_EQUAL(DNS_ERR(NOT_IMPLEMENTED
), werr
)) {
44 return DNS_RCODE_NOTIMP
;
45 } else if (W_ERROR_EQUAL(DNS_ERR(REFUSED
), werr
)) {
46 return DNS_RCODE_REFUSED
;
47 } else if (W_ERROR_EQUAL(DNS_ERR(YXDOMAIN
), werr
)) {
48 return DNS_RCODE_YXDOMAIN
;
49 } else if (W_ERROR_EQUAL(DNS_ERR(YXRRSET
), werr
)) {
50 return DNS_RCODE_YXRRSET
;
51 } else if (W_ERROR_EQUAL(DNS_ERR(NXRRSET
), werr
)) {
52 return DNS_RCODE_NXRRSET
;
53 } else if (W_ERROR_EQUAL(DNS_ERR(NOTAUTH
), werr
)) {
54 return DNS_RCODE_NOTAUTH
;
55 } else if (W_ERROR_EQUAL(DNS_ERR(NOTZONE
), werr
)) {
56 return DNS_RCODE_NOTZONE
;
58 DEBUG(5, ("No mapping exists for %%s\n"));
59 return DNS_RCODE_SERVFAIL
;
62 bool dns_name_match(const char *zone
, const char *name
, size_t *host_part_len
)
64 size_t zl
= strlen(zone
);
65 size_t nl
= strlen(name
);
67 static const size_t fixup
= 'a' - 'A';
73 for (zi
= zl
, ni
= nl
; zi
>= 0; zi
--, ni
--) {
77 /* convert to lower case */
78 if (zc
>= 'A' && zc
<= 'Z') {
81 if (nc
>= 'A' && nc
<= 'Z') {
91 if (name
[ni
] != '.') {
98 *host_part_len
= ni
+1;
103 /* Names are equal if they match and there's nothing left over */
104 bool dns_name_equal(const char *name1
, const char *name2
)
106 size_t host_part_len
;
107 bool ret
= dns_name_match(name1
, name2
, &host_part_len
);
109 return ret
&& (host_part_len
== 0);
113 see if two dns records match
115 bool dns_records_match(struct dnsp_DnssrvRpcRecord
*rec1
,
116 struct dnsp_DnssrvRpcRecord
*rec2
)
121 if (rec1
->wType
!= rec2
->wType
) {
125 /* see if the data matches */
126 switch (rec1
->wType
) {
128 return strcmp(rec1
->data
.ipv4
, rec2
->data
.ipv4
) == 0;
130 return strcmp(rec1
->data
.ipv6
, rec2
->data
.ipv6
) == 0;
132 return dns_name_equal(rec1
->data
.cname
, rec2
->data
.cname
);
134 if (rec1
->data
.txt
.count
!= rec2
->data
.txt
.count
) {
138 for (i
=0; i
<rec1
->data
.txt
.count
; i
++) {
139 status
= status
&& (strcmp(rec1
->data
.txt
.str
[i
],
140 rec2
->data
.txt
.str
[i
]) == 0);
144 return strcmp(rec1
->data
.ptr
, rec2
->data
.ptr
) == 0;
146 return dns_name_equal(rec1
->data
.ns
, rec2
->data
.ns
);
149 return rec1
->data
.srv
.wPriority
== rec2
->data
.srv
.wPriority
&&
150 rec1
->data
.srv
.wWeight
== rec2
->data
.srv
.wWeight
&&
151 rec1
->data
.srv
.wPort
== rec2
->data
.srv
.wPort
&&
152 dns_name_equal(rec1
->data
.srv
.nameTarget
, rec2
->data
.srv
.nameTarget
);
155 return rec1
->data
.mx
.wPriority
== rec2
->data
.mx
.wPriority
&&
156 dns_name_equal(rec1
->data
.mx
.nameTarget
, rec2
->data
.mx
.nameTarget
);
159 return strcmp(rec1
->data
.hinfo
.cpu
, rec2
->data
.hinfo
.cpu
) == 0 &&
160 strcmp(rec1
->data
.hinfo
.os
, rec2
->data
.hinfo
.os
) == 0;
163 return dns_name_equal(rec1
->data
.soa
.mname
, rec2
->data
.soa
.mname
) &&
164 dns_name_equal(rec1
->data
.soa
.rname
, rec2
->data
.soa
.rname
) &&
165 rec1
->data
.soa
.serial
== rec2
->data
.soa
.serial
&&
166 rec1
->data
.soa
.refresh
== rec2
->data
.soa
.refresh
&&
167 rec1
->data
.soa
.retry
== rec2
->data
.soa
.retry
&&
168 rec1
->data
.soa
.expire
== rec2
->data
.soa
.expire
&&
169 rec1
->data
.soa
.minimum
== rec2
->data
.soa
.minimum
;
177 WERROR
dns_lookup_records(struct dns_server
*dns
,
180 struct dnsp_DnssrvRpcRecord
**records
,
183 static const char * const attrs
[] = { "dnsRecord", NULL
};
184 struct ldb_message_element
*el
;
187 struct ldb_message
*msg
= NULL
;
188 struct dnsp_DnssrvRpcRecord
*recs
;
190 ret
= dsdb_search_one(dns
->samdb
, mem_ctx
, &msg
, dn
,
191 LDB_SCOPE_BASE
, attrs
, 0, "%s", "(objectClass=dnsNode)");
192 if (ret
!= LDB_SUCCESS
) {
193 /* TODO: we need to check if there's a glue record we need to
194 * create a referral to */
195 return DNS_ERR(NAME_ERROR
);
198 el
= ldb_msg_find_element(msg
, attrs
[0]);
205 recs
= talloc_zero_array(mem_ctx
, struct dnsp_DnssrvRpcRecord
, el
->num_values
);
206 W_ERROR_HAVE_NO_MEMORY(recs
);
207 for (ri
= 0; ri
< el
->num_values
; ri
++) {
208 struct ldb_val
*v
= &el
->values
[ri
];
209 enum ndr_err_code ndr_err
;
211 ndr_err
= ndr_pull_struct_blob(v
, recs
, &recs
[ri
],
212 (ndr_pull_flags_fn_t
)ndr_pull_dnsp_DnssrvRpcRecord
);
213 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
214 DEBUG(0, ("Failed to grab dnsp_DnssrvRpcRecord\n"));
215 return DNS_ERR(SERVER_FAILURE
);
219 *rec_count
= el
->num_values
;
223 WERROR
dns_replace_records(struct dns_server
*dns
,
227 const struct dnsp_DnssrvRpcRecord
*records
,
230 struct ldb_message_element
*el
;
233 struct ldb_message
*msg
= NULL
;
235 msg
= ldb_msg_new(mem_ctx
);
236 W_ERROR_HAVE_NO_MEMORY(msg
);
240 ret
= ldb_msg_add_empty(msg
, "dnsRecord", LDB_FLAG_MOD_REPLACE
, &el
);
241 if (ret
!= LDB_SUCCESS
) {
242 return DNS_ERR(SERVER_FAILURE
);
245 el
->values
= talloc_zero_array(el
, struct ldb_val
, rec_count
);
247 W_ERROR_HAVE_NO_MEMORY(el
->values
);
250 for (i
= 0; i
< rec_count
; i
++) {
251 static const struct dnsp_DnssrvRpcRecord zero
;
252 struct ldb_val
*v
= &el
->values
[el
->num_values
];
253 enum ndr_err_code ndr_err
;
255 if (memcmp(&records
[i
], &zero
, sizeof(zero
)) == 0) {
258 ndr_err
= ndr_push_struct_blob(v
, el
->values
, &records
[i
],
259 (ndr_push_flags_fn_t
)ndr_push_dnsp_DnssrvRpcRecord
);
260 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
261 DEBUG(0, ("Failed to grab dnsp_DnssrvRpcRecord\n"));
262 return DNS_ERR(SERVER_FAILURE
);
268 if (el
->num_values
== 0) {
272 /* TODO: Delete object? */
276 ret
= ldb_msg_add_string(msg
, "objectClass", "dnsNode");
277 if (ret
!= LDB_SUCCESS
) {
278 return DNS_ERR(SERVER_FAILURE
);
281 ret
= ldb_add(dns
->samdb
, msg
);
282 if (ret
!= LDB_SUCCESS
) {
283 return DNS_ERR(SERVER_FAILURE
);
289 ret
= ldb_modify(dns
->samdb
, msg
);
290 if (ret
!= LDB_SUCCESS
) {
291 return DNS_ERR(SERVER_FAILURE
);
297 WERROR
dns_name2dn(struct dns_server
*dns
,
304 const struct dns_server_zone
*z
;
305 size_t host_part_len
= 0;
308 return DNS_ERR(FORMAT_ERROR
);
311 /*TODO: Check if 'name' is a valid DNS name */
313 if (strcmp(name
, "") == 0) {
314 base
= ldb_get_default_basedn(dns
->samdb
);
315 dn
= ldb_dn_copy(mem_ctx
, base
);
316 ldb_dn_add_child_fmt(dn
, "DC=@,DC=RootDNSServers,CN=MicrosoftDNS,CN=System");
321 for (z
= dns
->zones
; z
!= NULL
; z
= z
->next
) {
324 match
= dns_name_match(z
->name
, name
, &host_part_len
);
331 return DNS_ERR(NAME_ERROR
);
334 if (host_part_len
== 0) {
335 dn
= ldb_dn_copy(mem_ctx
, z
->dn
);
336 ldb_dn_add_child_fmt(dn
, "DC=@");
341 dn
= ldb_dn_copy(mem_ctx
, z
->dn
);
342 ldb_dn_add_child_fmt(dn
, "DC=%*.*s", (int)host_part_len
, (int)host_part_len
, name
);