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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*
* Note that on Win32 there is normally no resolv.conf since all information
* is stored in the registry. Therefore there is no ordering like the
* contents of resolv.conf. Since the "search" or "domain" keyword, on
* Win32 if a search list is found it is used, otherwise the domain name
* is used since they are mutually exclusive. The search list can be entered
* in the DNS tab of the "Advanced TCP/IP settings" window under the same place
* that you add your nameserver list.
*/
#define HAVE_GET_WIN32_NAMESERVERS 1
#include "../resconf.c"
#include <iphlpapi.h>
#define TCPIP_SUBKEY "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters"
isc_result_t
get_win32_searchlist(irs_resconf_t *conf) {
isc_result_t result = ISC_R_SUCCESS;
HKEY hKey;
char searchlist[MAX_PATH];
DWORD searchlen = MAX_PATH;
LSTATUS status;
char *cp;
REQUIRE(conf != NULL);
memset(searchlist, 0, MAX_PATH);
status = RegOpenKeyEx(HKEY_LOCAL_MACHINE, TCPIP_SUBKEY, 0, KEY_READ,
&hKey);
if (status != ERROR_SUCCESS) {
return (ISC_R_SUCCESS);
}
status = RegQueryValueEx(hKey, "SearchList", NULL, NULL,
(LPBYTE)searchlist, &searchlen);
RegCloseKey(hKey);
if (status != ERROR_SUCCESS) {
return (ISC_R_SUCCESS);
}
cp = strtok((char *)searchlist, ", \0");
while (cp != NULL) {
result = add_search(conf, cp);
if (result != ISC_R_SUCCESS) {
break;
}
cp = strtok(NULL, ", \0");
}
return (result);
}
isc_result_t
get_win32_nameservers(irs_resconf_t *conf) {
isc_result_t result;
FIXED_INFO *FixedInfo;
ULONG BufLen = sizeof(FIXED_INFO);
DWORD dwRetVal;
IP_ADDR_STRING *pIPAddr;
REQUIRE(conf != NULL);
FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, BufLen);
if (FixedInfo == NULL) {
return (ISC_R_NOMEMORY);
}
dwRetVal = GetNetworkParams(FixedInfo, &BufLen);
if (dwRetVal == ERROR_BUFFER_OVERFLOW) {
GlobalFree(FixedInfo);
FixedInfo = GlobalAlloc(GPTR, BufLen);
if (FixedInfo == NULL) {
return (ISC_R_NOMEMORY);
}
dwRetVal = GetNetworkParams(FixedInfo, &BufLen);
}
if (dwRetVal != ERROR_SUCCESS) {
GlobalFree(FixedInfo);
return (ISC_R_FAILURE);
}
result = get_win32_searchlist(conf);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
if (ISC_LIST_EMPTY(conf->searchlist) &&
strlen(FixedInfo->DomainName) > 0)
{
result = add_search(conf, FixedInfo->DomainName);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
}
/* Get the list of nameservers */
pIPAddr = &FixedInfo->DnsServerList;
while (pIPAddr) {
if (conf->numns >= RESCONFMAXNAMESERVERS) {
break;
}
result = add_server(conf->mctx, pIPAddr->IpAddress.String,
&conf->nameservers);
if (result != ISC_R_SUCCESS) {
break;
}
conf->numns++;
pIPAddr = pIPAddr->Next;
}
cleanup:
if (FixedInfo != NULL) {
GlobalFree(FixedInfo);
}
return (result);
}
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