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(WERR_DNS_ERROR_NAME_DOES_NOT_EXIST, werr)) {
44 return DNS_RCODE_NXDOMAIN;
45 } else if (W_ERROR_EQUAL(DNS_ERR(NOT_IMPLEMENTED), werr)) {
46 return DNS_RCODE_NOTIMP;
47 } else if (W_ERROR_EQUAL(DNS_ERR(REFUSED), werr)) {
48 return DNS_RCODE_REFUSED;
49 } else if (W_ERROR_EQUAL(DNS_ERR(YXDOMAIN), werr)) {
50 return DNS_RCODE_YXDOMAIN;
51 } else if (W_ERROR_EQUAL(DNS_ERR(YXRRSET), werr)) {
52 return DNS_RCODE_YXRRSET;
53 } else if (W_ERROR_EQUAL(DNS_ERR(NXRRSET), werr)) {
54 return DNS_RCODE_NXRRSET;
55 } else if (W_ERROR_EQUAL(DNS_ERR(NOTAUTH), werr)) {
56 return DNS_RCODE_NOTAUTH;
57 } else if (W_ERROR_EQUAL(DNS_ERR(NOTZONE), werr)) {
58 return DNS_RCODE_NOTZONE;
59 } else if (W_ERROR_EQUAL(DNS_ERR(BADKEY), werr)) {
60 return DNS_RCODE_BADKEY;
62 DEBUG(5, ("No mapping exists for %s\n", win_errstr(werr)));
63 return DNS_RCODE_SERVFAIL;
66 bool dns_name_match(const char *zone, const char *name, size_t *host_part_len)
68 size_t zl = strlen(zone);
69 size_t nl = strlen(name);
71 static const size_t fixup = 'a' - 'A';
77 for (zi = zl, ni = nl; zi >= 0; zi--, ni--) {
81 /* convert to lower case */
82 if (zc >= 'A' && zc <= 'Z') {
85 if (nc >= 'A' && nc <= 'Z') {
95 if (name[ni] != '.') {
102 *host_part_len = ni+1;
107 /* Names are equal if they match and there's nothing left over */
108 bool dns_name_equal(const char *name1, const char *name2)
110 size_t host_part_len;
111 bool ret = dns_name_match(name1, name2, &host_part_len);
113 return ret && (host_part_len == 0);
117 see if two dns records match
119 bool dns_records_match(struct dnsp_DnssrvRpcRecord *rec1,
120 struct dnsp_DnssrvRpcRecord *rec2)
125 if (rec1->wType != rec2->wType) {
129 /* see if the data matches */
130 switch (rec1->wType) {
132 return strcmp(rec1->data.ipv4, rec2->data.ipv4) == 0;
134 return strcmp(rec1->data.ipv6, rec2->data.ipv6) == 0;
136 return dns_name_equal(rec1->data.cname, rec2->data.cname);
138 if (rec1->data.txt.count != rec2->data.txt.count) {
142 for (i=0; i<rec1->data.txt.count; i++) {
143 status = status && (strcmp(rec1->data.txt.str[i],
144 rec2->data.txt.str[i]) == 0);
148 return strcmp(rec1->data.ptr, rec2->data.ptr) == 0;
150 return dns_name_equal(rec1->data.ns, rec2->data.ns);
153 return rec1->data.srv.wPriority == rec2->data.srv.wPriority &&
154 rec1->data.srv.wWeight == rec2->data.srv.wWeight &&
155 rec1->data.srv.wPort == rec2->data.srv.wPort &&
156 dns_name_equal(rec1->data.srv.nameTarget, rec2->data.srv.nameTarget);
159 return rec1->data.mx.wPriority == rec2->data.mx.wPriority &&
160 dns_name_equal(rec1->data.mx.nameTarget, rec2->data.mx.nameTarget);
163 return strcmp(rec1->data.hinfo.cpu, rec2->data.hinfo.cpu) == 0 &&
164 strcmp(rec1->data.hinfo.os, rec2->data.hinfo.os) == 0;
167 return dns_name_equal(rec1->data.soa.mname, rec2->data.soa.mname) &&
168 dns_name_equal(rec1->data.soa.rname, rec2->data.soa.rname) &&
169 rec1->data.soa.serial == rec2->data.soa.serial &&
170 rec1->data.soa.refresh == rec2->data.soa.refresh &&
171 rec1->data.soa.retry == rec2->data.soa.retry &&
172 rec1->data.soa.expire == rec2->data.soa.expire &&
173 rec1->data.soa.minimum == rec2->data.soa.minimum;
181 WERROR dns_lookup_records(struct dns_server *dns,
184 struct dnsp_DnssrvRpcRecord **records,
187 static const char * const attrs[] = { "dnsRecord", NULL};
188 struct ldb_message_element *el;
191 struct ldb_message *msg = NULL;
192 struct dnsp_DnssrvRpcRecord *recs;
197 ret = dsdb_search_one(dns->samdb, mem_ctx, &msg, dn,
198 LDB_SCOPE_BASE, attrs, 0, "%s", "(objectClass=dnsNode)");
199 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
200 return WERR_DNS_ERROR_NAME_DOES_NOT_EXIST;
202 if (ret != LDB_SUCCESS) {
203 /* TODO: we need to check if there's a glue record we need to
204 * create a referral to */
205 return DNS_ERR(NAME_ERROR);
208 el = ldb_msg_find_element(msg, attrs[0]);
210 return DNS_ERR(NAME_ERROR);
213 recs = talloc_zero_array(mem_ctx, struct dnsp_DnssrvRpcRecord, el->num_values);
214 W_ERROR_HAVE_NO_MEMORY(recs);
215 for (ri = 0; ri < el->num_values; ri++) {
216 struct ldb_val *v = &el->values[ri];
217 enum ndr_err_code ndr_err;
219 ndr_err = ndr_pull_struct_blob(v, recs, &recs[ri],
220 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
221 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
222 DEBUG(0, ("Failed to grab dnsp_DnssrvRpcRecord\n"));
223 return DNS_ERR(SERVER_FAILURE);
227 *rec_count = el->num_values;
231 WERROR dns_replace_records(struct dns_server *dns,
235 const struct dnsp_DnssrvRpcRecord *records,
238 struct ldb_message_element *el;
241 struct ldb_message *msg = NULL;
243 msg = ldb_msg_new(mem_ctx);
244 W_ERROR_HAVE_NO_MEMORY(msg);
248 ret = ldb_msg_add_empty(msg, "dnsRecord", LDB_FLAG_MOD_REPLACE, &el);
249 if (ret != LDB_SUCCESS) {
250 return DNS_ERR(SERVER_FAILURE);
253 el->values = talloc_zero_array(el, struct ldb_val, rec_count);
255 W_ERROR_HAVE_NO_MEMORY(el->values);
258 for (i = 0; i < rec_count; i++) {
259 static const struct dnsp_DnssrvRpcRecord zero;
260 struct ldb_val *v = &el->values[el->num_values];
261 enum ndr_err_code ndr_err;
263 if (memcmp(&records[i], &zero, sizeof(zero)) == 0) {
266 ndr_err = ndr_push_struct_blob(v, el->values, &records[i],
267 (ndr_push_flags_fn_t)ndr_push_dnsp_DnssrvRpcRecord);
268 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
269 DEBUG(0, ("Failed to grab dnsp_DnssrvRpcRecord\n"));
270 return DNS_ERR(SERVER_FAILURE);
276 if (el->num_values == 0) {
280 /* TODO: Delete object? */
281 el->flags = LDB_FLAG_MOD_DELETE;
285 ret = ldb_msg_add_string(msg, "objectClass", "dnsNode");
286 if (ret != LDB_SUCCESS) {
287 return DNS_ERR(SERVER_FAILURE);
290 ret = ldb_add(dns->samdb, msg);
291 if (ret != LDB_SUCCESS) {
292 return DNS_ERR(SERVER_FAILURE);
298 ret = ldb_modify(dns->samdb, msg);
299 if (ret != LDB_SUCCESS) {
300 return DNS_ERR(SERVER_FAILURE);
306 bool dns_authorative_for_zone(struct dns_server *dns,
309 const struct dns_server_zone *z;
310 size_t host_part_len = 0;
316 if (strcmp(name, "") == 0) {
319 for (z = dns->zones; z != NULL; z = z->next) {
322 match = dns_name_match(z->name, name, &host_part_len);
334 WERROR dns_name2dn(struct dns_server *dns,
341 const struct dns_server_zone *z;
342 size_t host_part_len = 0;
345 return DNS_ERR(FORMAT_ERROR);
348 /*TODO: Check if 'name' is a valid DNS name */
350 if (strcmp(name, "") == 0) {
351 base = ldb_get_default_basedn(dns->samdb);
352 dn = ldb_dn_copy(mem_ctx, base);
353 ldb_dn_add_child_fmt(dn, "DC=@,DC=RootDNSServers,CN=MicrosoftDNS,CN=System");
358 for (z = dns->zones; z != NULL; z = z->next) {
361 match = dns_name_match(z->name, name, &host_part_len);
368 return DNS_ERR(NAME_ERROR);
371 if (host_part_len == 0) {
372 dn = ldb_dn_copy(mem_ctx, z->dn);
373 ldb_dn_add_child_fmt(dn, "DC=@");
378 dn = ldb_dn_copy(mem_ctx, z->dn);
379 ldb_dn_add_child_fmt(dn, "DC=%*.*s", (int)host_part_len, (int)host_part_len, name);
384 WERROR dns_generate_options(struct dns_server *dns,
386 struct dns_res_rec **options)
388 struct dns_res_rec *o;
390 o = talloc_zero(mem_ctx, struct dns_res_rec);
395 o->rr_type = DNS_QTYPE_OPT;
396 /* This is ugly, but RFC2671 wants the payload size in this field */
397 o->rr_class = (enum dns_qclass) dns->max_payload;