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 bool dns_name_match(const char *zone, const char *name, size_t *host_part_len)
35 size_t zl = strlen(zone);
36 size_t nl = strlen(name);
38 static const size_t fixup = 'a' - 'A';
44 for (zi = zl, ni = nl; zi >= 0; zi--, ni--) {
48 /* convert to lower case */
49 if (zc >= 'A' && zc <= 'Z') {
52 if (nc >= 'A' && nc <= 'Z') {
62 if (name[ni] != '.') {
69 *host_part_len = ni+1;
74 /* Names are equal if they match and there's nothing left over */
75 bool dns_name_equal(const char *name1, const char *name2)
78 bool ret = dns_name_match(name1, name2, &host_part_len);
80 return ret && (host_part_len == 0);
84 see if two dns records match
86 bool dns_records_match(struct dnsp_DnssrvRpcRecord *rec1,
87 struct dnsp_DnssrvRpcRecord *rec2)
92 if (rec1->wType != rec2->wType) {
96 /* see if the data matches */
97 switch (rec1->wType) {
99 return strcmp(rec1->data.ipv4, rec2->data.ipv4) == 0;
101 return strcmp(rec1->data.ipv6, rec2->data.ipv6) == 0;
103 return dns_name_equal(rec1->data.cname, rec2->data.cname);
105 if (rec1->data.txt.count != rec2->data.txt.count) {
109 for (i=0; i<rec1->data.txt.count; i++) {
110 status = status && (strcmp(rec1->data.txt.str[i],
111 rec2->data.txt.str[i]) == 0);
115 return strcmp(rec1->data.ptr, rec2->data.ptr) == 0;
117 return dns_name_equal(rec1->data.ns, rec2->data.ns);
120 return rec1->data.srv.wPriority == rec2->data.srv.wPriority &&
121 rec1->data.srv.wWeight == rec2->data.srv.wWeight &&
122 rec1->data.srv.wPort == rec2->data.srv.wPort &&
123 dns_name_equal(rec1->data.srv.nameTarget, rec2->data.srv.nameTarget);
126 return rec1->data.mx.wPriority == rec2->data.mx.wPriority &&
127 dns_name_equal(rec1->data.mx.nameTarget, rec2->data.mx.nameTarget);
130 return strcmp(rec1->data.hinfo.cpu, rec2->data.hinfo.cpu) == 0 &&
131 strcmp(rec1->data.hinfo.os, rec2->data.hinfo.os) == 0;
134 return dns_name_equal(rec1->data.soa.mname, rec2->data.soa.mname) &&
135 dns_name_equal(rec1->data.soa.rname, rec2->data.soa.rname) &&
136 rec1->data.soa.serial == rec2->data.soa.serial &&
137 rec1->data.soa.refresh == rec2->data.soa.refresh &&
138 rec1->data.soa.retry == rec2->data.soa.retry &&
139 rec1->data.soa.expire == rec2->data.soa.expire &&
140 rec1->data.soa.minimum == rec2->data.soa.minimum;
148 WERROR dns_lookup_records(struct dns_server *dns,
151 struct dnsp_DnssrvRpcRecord **records,
154 return dns_common_lookup(dns->samdb, mem_ctx, dn, records, rec_count);
157 WERROR dns_replace_records(struct dns_server *dns,
161 struct dnsp_DnssrvRpcRecord *records,
164 struct ldb_message_element *el;
167 struct ldb_message *msg = NULL;
169 msg = ldb_msg_new(mem_ctx);
170 W_ERROR_HAVE_NO_MEMORY(msg);
174 ret = ldb_msg_add_empty(msg, "dnsRecord", LDB_FLAG_MOD_REPLACE, &el);
175 if (ret != LDB_SUCCESS) {
176 return DNS_ERR(SERVER_FAILURE);
179 el->values = talloc_zero_array(el, struct ldb_val, rec_count);
181 W_ERROR_HAVE_NO_MEMORY(el->values);
184 for (i = 0; i < rec_count; i++) {
185 static const struct dnsp_DnssrvRpcRecord zero;
186 struct ldb_val *v = &el->values[el->num_values];
187 enum ndr_err_code ndr_err;
189 if (memcmp(&records[i], &zero, sizeof(zero)) == 0) {
192 ndr_err = ndr_push_struct_blob(v, el->values, &records[i],
193 (ndr_push_flags_fn_t)ndr_push_dnsp_DnssrvRpcRecord);
194 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
195 DEBUG(0, ("Failed to grab dnsp_DnssrvRpcRecord\n"));
196 return DNS_ERR(SERVER_FAILURE);
202 if (el->num_values == 0) {
206 /* TODO: Delete object? */
207 el->flags = LDB_FLAG_MOD_DELETE;
211 ret = ldb_msg_add_string(msg, "objectClass", "dnsNode");
212 if (ret != LDB_SUCCESS) {
213 return DNS_ERR(SERVER_FAILURE);
216 ret = ldb_add(dns->samdb, msg);
217 if (ret != LDB_SUCCESS) {
218 return DNS_ERR(SERVER_FAILURE);
224 ret = ldb_modify(dns->samdb, msg);
225 if (ret != LDB_SUCCESS) {
226 return DNS_ERR(SERVER_FAILURE);
232 bool dns_authorative_for_zone(struct dns_server *dns,
235 const struct dns_server_zone *z;
236 size_t host_part_len = 0;
242 if (strcmp(name, "") == 0) {
245 for (z = dns->zones; z != NULL; z = z->next) {
248 match = dns_name_match(z->name, name, &host_part_len);
260 WERROR dns_name2dn(struct dns_server *dns,
267 const struct dns_server_zone *z;
268 size_t host_part_len = 0;
271 return DNS_ERR(FORMAT_ERROR);
274 /*TODO: Check if 'name' is a valid DNS name */
276 if (strcmp(name, "") == 0) {
277 base = ldb_get_default_basedn(dns->samdb);
278 dn = ldb_dn_copy(mem_ctx, base);
279 ldb_dn_add_child_fmt(dn, "DC=@,DC=RootDNSServers,CN=MicrosoftDNS,CN=System");
284 for (z = dns->zones; z != NULL; z = z->next) {
287 match = dns_name_match(z->name, name, &host_part_len);
294 return DNS_ERR(NAME_ERROR);
297 if (host_part_len == 0) {
298 dn = ldb_dn_copy(mem_ctx, z->dn);
299 ldb_dn_add_child_fmt(dn, "DC=@");
304 dn = ldb_dn_copy(mem_ctx, z->dn);
305 ldb_dn_add_child_fmt(dn, "DC=%*.*s", (int)host_part_len, (int)host_part_len, name);
310 WERROR dns_generate_options(struct dns_server *dns,
312 struct dns_res_rec **options)
314 struct dns_res_rec *o;
316 o = talloc_zero(mem_ctx, struct dns_res_rec);
321 o->rr_type = DNS_QTYPE_OPT;
322 /* This is ugly, but RFC2671 wants the payload size in this field */
323 o->rr_class = (enum dns_qclass) dns->max_payload;