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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* 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 http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/* $Id: lwconfig.c,v 1.7 2007/12/14 01:40:42 marka Exp $ */
/*
* We do this so that we may incorporate everything in the main routines
* so that we can take advantage of the fixes and changes made there
* without having to add them twice. We can then call the parse routine
* if there is a resolv.conf file and fetch our own data from the
* Windows environment otherwise.
*/
/*
* 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 lwres_conf_parse generic_lwres_conf_parse
#include "../lwconfig.c"
#undef lwres_conf_parse
#include <iphlpapi.h>
#define TCPIP_SUBKEY \
"SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters"
void
get_win32_searchlist(lwres_context_t *ctx) {
HKEY hKey;
BOOL keyFound = TRUE;
char searchlist[MAX_PATH];
DWORD searchlen = MAX_PATH;
char *cp;
lwres_conf_t *confdata;
REQUIRE(ctx != NULL);
confdata = &ctx->confdata;
memset(searchlist, 0, MAX_PATH);
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, TCPIP_SUBKEY, 0, KEY_READ, &hKey)
!= ERROR_SUCCESS)
keyFound = FALSE;
if (keyFound == TRUE) {
/* Get the named directory */
if (RegQueryValueEx(hKey, "SearchList", NULL, NULL,
(LPBYTE)searchlist, &searchlen) != ERROR_SUCCESS)
keyFound = FALSE;
RegCloseKey(hKey);
}
confdata->searchnxt = 0;
if (!keyFound)
return;
cp = strtok((char *)searchlist, ", \0");
while (cp != NULL) {
if (confdata->searchnxt == LWRES_CONFMAXSEARCH)
break;
if (strlen(cp) <= MAX_PATH && strlen(cp) > 0) {
confdata->search[confdata->searchnxt] = lwres_strdup(ctx, cp);
if (confdata->search[confdata->searchnxt] != NULL)
confdata->searchnxt++;
}
cp = strtok(NULL, ", \0");
}
}
lwres_result_t
lwres_conf_parse(lwres_context_t *ctx, const char *filename) {
lwres_result_t ret;
lwres_conf_t *confdata;
FIXED_INFO * FixedInfo;
ULONG BufLen = sizeof(FIXED_INFO);
DWORD dwRetVal;
IP_ADDR_STRING *pIPAddr;
REQUIRE(ctx != NULL);
confdata = &ctx->confdata;
REQUIRE(confdata != NULL);
/* Use the resolver if there is one */
ret = generic_lwres_conf_parse(ctx, filename);
if ((ret != LWRES_R_NOTFOUND && ret != LWRES_R_SUCCESS) ||
(ret == LWRES_R_SUCCESS && confdata->nsnext > 0))
return (ret);
/*
* We didn't get any nameservers so we need to do this ourselves
*/
FixedInfo = (FIXED_INFO *) GlobalAlloc(GPTR, BufLen);
dwRetVal = GetNetworkParams(FixedInfo, &BufLen);
if (dwRetVal == ERROR_BUFFER_OVERFLOW) {
GlobalFree(FixedInfo);
FixedInfo = GlobalAlloc(GPTR, BufLen);
dwRetVal = GetNetworkParams(FixedInfo, &BufLen);
}
if (dwRetVal != ERROR_SUCCESS) {
GlobalFree(FixedInfo);
return (LWRES_R_FAILURE);
}
/* Get the search list from the registry */
get_win32_searchlist(ctx);
/* Use only if there is no search list */
if (confdata->searchnxt == 0 && strlen(FixedInfo->DomainName) > 0) {
confdata->domainname = lwres_strdup(ctx, FixedInfo->DomainName);
if (confdata->domainname == NULL) {
GlobalFree(FixedInfo);
return (LWRES_R_FAILURE);
}
} else
confdata->domainname = NULL;
/* Get the list of nameservers */
pIPAddr = &FixedInfo->DnsServerList;
while (pIPAddr) {
if (confdata->nsnext >= LWRES_CONFMAXNAMESERVERS)
break;
ret = lwres_create_addr(pIPAddr->IpAddress.String,
&confdata->nameservers[confdata->nsnext++], 1);
if (ret != LWRES_R_SUCCESS) {
GlobalFree(FixedInfo);
return (ret);
}
pIPAddr = pIPAddr ->Next;
}
GlobalFree(FixedInfo);
return (LWRES_R_SUCCESS);
}
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