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)
118 if (rec1->wType != rec2->wType) {
122 /* see if the data matches */
123 switch (rec1->wType) {
125 return strcmp(rec1->data.ipv4, rec2->data.ipv4) == 0;
127 return strcmp(rec1->data.ipv6, rec2->data.ipv6) == 0;
129 return dns_name_equal(rec1->data.cname, rec2->data.cname);
131 return strcmp(rec1->data.txt, rec2->data.txt) == 0;
133 return strcmp(rec1->data.ptr, rec2->data.ptr) == 0;
135 return dns_name_equal(rec1->data.ns, rec2->data.ns);
138 return rec1->data.srv.wPriority == rec2->data.srv.wPriority &&
139 rec1->data.srv.wWeight == rec2->data.srv.wWeight &&
140 rec1->data.srv.wPort == rec2->data.srv.wPort &&
141 dns_name_equal(rec1->data.srv.nameTarget, rec2->data.srv.nameTarget);
144 return rec1->data.mx.wPriority == rec2->data.mx.wPriority &&
145 dns_name_equal(rec1->data.mx.nameTarget, rec2->data.mx.nameTarget);
148 return strcmp(rec1->data.hinfo.cpu, rec2->data.hinfo.cpu) == 0 &&
149 strcmp(rec1->data.hinfo.os, rec2->data.hinfo.os) == 0;
152 return dns_name_equal(rec1->data.soa.mname, rec2->data.soa.mname) &&
153 dns_name_equal(rec1->data.soa.rname, rec2->data.soa.rname) &&
154 rec1->data.soa.serial == rec2->data.soa.serial &&
155 rec1->data.soa.refresh == rec2->data.soa.refresh &&
156 rec1->data.soa.retry == rec2->data.soa.retry &&
157 rec1->data.soa.expire == rec2->data.soa.expire &&
158 rec1->data.soa.minimum == rec2->data.soa.minimum;
166 WERROR dns_lookup_records(struct dns_server *dns,
169 struct dnsp_DnssrvRpcRecord **records,
172 static const char * const attrs[] = { "dnsRecord", NULL};
173 struct ldb_message_element *el;
176 struct ldb_message *msg = NULL;
177 struct dnsp_DnssrvRpcRecord *recs;
179 ret = dsdb_search_one(dns->samdb, mem_ctx, &msg, dn,
180 LDB_SCOPE_BASE, attrs, 0, "%s", "(objectClass=dnsNode)");
181 if (ret != LDB_SUCCESS) {
182 /* TODO: we need to check if there's a glue record we need to
183 * create a referral to */
184 return DNS_ERR(NAME_ERROR);
187 el = ldb_msg_find_element(msg, attrs[0]);
194 recs = talloc_zero_array(mem_ctx, struct dnsp_DnssrvRpcRecord, el->num_values);
195 W_ERROR_HAVE_NO_MEMORY(recs);
196 for (ri = 0; ri < el->num_values; ri++) {
197 struct ldb_val *v = &el->values[ri];
198 enum ndr_err_code ndr_err;
200 ndr_err = ndr_pull_struct_blob(v, recs, &recs[ri],
201 (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
202 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
203 DEBUG(0, ("Failed to grab dnsp_DnssrvRpcRecord\n"));
204 return DNS_ERR(SERVER_FAILURE);
208 *rec_count = el->num_values;
212 WERROR dns_name2dn(struct dns_server *dns,
219 const struct dns_server_zone *z;
220 size_t host_part_len = 0;
223 return DNS_ERR(FORMAT_ERROR);
226 /*TODO: Check if 'name' is a valid DNS name */
228 if (strcmp(name, "") == 0) {
229 base = ldb_get_default_basedn(dns->samdb);
230 dn = ldb_dn_copy(mem_ctx, base);
231 ldb_dn_add_child_fmt(dn, "DC=@,DC=RootDNSServers,CN=MicrosoftDNS,CN=System");
236 for (z = dns->zones; z != NULL; z = z->next) {
239 match = dns_name_match(z->name, name, &host_part_len);
246 return DNS_ERR(NAME_ERROR);
249 if (host_part_len == 0) {
250 dn = ldb_dn_copy(mem_ctx, z->dn);
251 ldb_dn_add_child_fmt(dn, "DC=@");
256 dn = ldb_dn_copy(mem_ctx, z->dn);
257 ldb_dn_add_child_fmt(dn, "DC=%*.*s", (int)host_part_len, (int)host_part_len, name);