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