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152 lines
3.6 KiB
C
152 lines
3.6 KiB
C
/*
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Unix SMB/CIFS implementation.
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DNS server utils
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Copyright (C) 2010 Kai Blin <kai@samba.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "libcli/util/ntstatus.h"
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#include "libcli/util/werror.h"
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#include "librpc/ndr/libndr.h"
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#include "librpc/gen_ndr/ndr_dns.h"
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#include "librpc/gen_ndr/ndr_dnsp.h"
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#include <ldb.h>
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#include "dsdb/samdb/samdb.h"
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#include "dsdb/common/util.h"
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#include "dns_server/dns_server.h"
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uint8_t werr_to_dns_err(WERROR werr)
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{
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if (W_ERROR_EQUAL(WERR_OK, werr)) {
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return DNS_RCODE_OK;
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} else if (W_ERROR_EQUAL(DNS_ERR(FORMAT_ERROR), werr)) {
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return DNS_RCODE_FORMERR;
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} else if (W_ERROR_EQUAL(DNS_ERR(SERVER_FAILURE), werr)) {
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return DNS_RCODE_SERVFAIL;
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} else if (W_ERROR_EQUAL(DNS_ERR(NAME_ERROR), werr)) {
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return DNS_RCODE_NXDOMAIN;
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} else if (W_ERROR_EQUAL(DNS_ERR(NOT_IMPLEMENTED), werr)) {
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return DNS_RCODE_NOTIMP;
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} else if (W_ERROR_EQUAL(DNS_ERR(REFUSED), werr)) {
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return DNS_RCODE_REFUSED;
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} else if (W_ERROR_EQUAL(DNS_ERR(YXDOMAIN), werr)) {
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return DNS_RCODE_YXDOMAIN;
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} else if (W_ERROR_EQUAL(DNS_ERR(YXRRSET), werr)) {
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return DNS_RCODE_YXRRSET;
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} else if (W_ERROR_EQUAL(DNS_ERR(NXRRSET), werr)) {
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return DNS_RCODE_NXRRSET;
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} else if (W_ERROR_EQUAL(DNS_ERR(NOTAUTH), werr)) {
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return DNS_RCODE_NOTAUTH;
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} else if (W_ERROR_EQUAL(DNS_ERR(NOTZONE), werr)) {
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return DNS_RCODE_NOTZONE;
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}
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DEBUG(5, ("No mapping exists for %%s\n"));
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return DNS_RCODE_SERVFAIL;
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}
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bool dns_name_match(const char *zone, const char *name, size_t *host_part_len)
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{
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size_t zl = strlen(zone);
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size_t nl = strlen(name);
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ssize_t zi, ni;
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static const size_t fixup = 'a' - 'A';
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if (zl > nl) {
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return false;
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}
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for (zi = zl, ni = nl; zi >= 0; zi--, ni--) {
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char zc = zone[zi];
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char nc = name[ni];
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/* convert to lower case */
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if (zc >= 'A' && zc <= 'Z') {
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zc += fixup;
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}
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if (nc >= 'A' && nc <= 'Z') {
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nc += fixup;
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}
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if (zc != nc) {
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return false;
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}
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}
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if (ni >= 0) {
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if (name[ni] != '.') {
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return false;
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}
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ni--;
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}
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*host_part_len = ni+1;
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return true;
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}
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WERROR dns_name2dn(struct dns_server *dns,
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TALLOC_CTX *mem_ctx,
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const char *name,
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struct ldb_dn **_dn)
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{
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struct ldb_dn *base;
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struct ldb_dn *dn;
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const struct dns_server_zone *z;
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size_t host_part_len = 0;
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if (name == NULL) {
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return DNS_ERR(FORMAT_ERROR);
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}
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/*TODO: Check if 'name' is a valid DNS name */
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if (strcmp(name, "") == 0) {
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base = ldb_get_default_basedn(dns->samdb);
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dn = ldb_dn_copy(mem_ctx, base);
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ldb_dn_add_child_fmt(dn, "DC=@,DC=RootDNSServers,CN=MicrosoftDNS,CN=System");
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*_dn = dn;
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return WERR_OK;
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}
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for (z = dns->zones; z != NULL; z = z->next) {
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bool match;
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match = dns_name_match(z->name, name, &host_part_len);
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if (match) {
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break;
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}
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}
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if (z == NULL) {
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return DNS_ERR(NAME_ERROR);
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}
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if (host_part_len == 0) {
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dn = ldb_dn_copy(mem_ctx, z->dn);
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ldb_dn_add_child_fmt(dn, "DC=@");
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*_dn = dn;
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return WERR_OK;
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}
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dn = ldb_dn_copy(mem_ctx, z->dn);
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ldb_dn_add_child_fmt(dn, "DC=%*.*s", (int)host_part_len, (int)host_part_len, name);
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*_dn = dn;
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return WERR_OK;
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}
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