762 lines
13 KiB
C
762 lines
13 KiB
C
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/*++
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Copyright (c) 1996-2000 Microsoft Corporation
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Module Name:
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dnsapi.c
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Abstract:
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Domain Name System (DNS) API
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Dnsapi.dll infrastructure (init, shutdown, etc)
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Routines to access DNS resolver
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Author:
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GlennC 22-Jan-1997
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Revision History:
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Jim Gilroy (jamesg) March 2000 cleanup
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--*/
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#include "local.h"
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#include <lmcons.h>
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#define DNS_NET_FAILURE_CACHE_TIME 30 // Seconds
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//
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// Global Definitions
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//
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//
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// Globals
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//
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CRITICAL_SECTION g_RegistrationListCS;
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CRITICAL_SECTION g_RegistrationThreadCS;
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CRITICAL_SECTION g_QueueCS;
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CRITICAL_SECTION g_NetFailureCS;
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DWORD g_NetFailureTime;
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DNS_STATUS g_NetFailureStatus;
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IP_ADDRESS g_LastDNSServerUpdated = 0;
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//
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// Local Function Prototypes
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//
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BOOL
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DnsInitialize(
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VOID
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);
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VOID
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DnsCleanup(
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VOID
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);
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VOID
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ClearDnsCacheEntry_A (
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IN LPSTR,
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IN WORD );
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VOID
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ClearDnsCacheEntry_W (
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IN LPWSTR,
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IN WORD );
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VOID
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FreeRpcIpAddressList(
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IN PDNS_IP_ADDR_LIST );
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//
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// System public Network Information
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//
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// The dnsapi.dll interface is in config.c
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//
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PDNS_NETWORK_INFORMATION
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CreateNetworkInformation(
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IN DWORD cAdapterCount
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)
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/*++
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Routine Description:
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None.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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PDNS_NETWORK_INFORMATION pNetworkInfo = NULL;
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DWORD dwAdapterListBufLen = sizeof( DNS_NETWORK_INFORMATION ) -
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sizeof( PDNS_ADAPTER_INFORMATION ) +
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( sizeof( PDNS_ADAPTER_INFORMATION ) *
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cAdapterCount );
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pNetworkInfo = (PDNS_NETWORK_INFORMATION) ALLOCATE_HEAP_ZERO(
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dwAdapterListBufLen );
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return pNetworkInfo;
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}
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PDNS_SEARCH_INFORMATION
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CreateSearchInformation(
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IN DWORD cNameCount,
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IN LPSTR pszName
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)
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{
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PDNS_SEARCH_INFORMATION pSearchInfo = NULL;
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DWORD dwSearchInfoBufLen = sizeof( DNS_SEARCH_INFORMATION ) -
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sizeof( LPSTR ) +
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( sizeof( LPSTR ) *
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cNameCount );
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if ( ( cNameCount == 0 ) && ( ! pszName ) )
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{
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return NULL;
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}
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pSearchInfo =
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(PDNS_SEARCH_INFORMATION) ALLOCATE_HEAP_ZERO( dwSearchInfoBufLen );
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if ( ! pSearchInfo )
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{
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return NULL;
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}
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if ( pszName )
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{
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pSearchInfo->pszPrimaryDomainName = Dns_NameCopyAllocate(
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pszName,
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0,
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DnsCharSetUtf8,
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DnsCharSetUtf8 );
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if ( ! pSearchInfo->pszPrimaryDomainName )
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{
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FREE_HEAP( pSearchInfo );
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return NULL;
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}
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}
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return pSearchInfo;
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}
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PDNS_SEARCH_INFORMATION
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CreateSearchInformationCopyFromList(
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IN PSEARCH_LIST pSearchList
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)
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/*++
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Routine Description:
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None.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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PDNS_SEARCH_INFORMATION pSearchInformation;
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DWORD iter;
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if ( ! pSearchList )
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{
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return NULL;
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}
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pSearchInformation = CreateSearchInformation(
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pSearchList->NameCount,
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pSearchList->pszDomainOrZoneName );
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if ( ! pSearchInformation )
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{
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return NULL;
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}
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for ( iter = 0; iter < pSearchList->NameCount; iter++ )
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{
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if ( pSearchList->SearchNameArray[iter].pszName )
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{
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pSearchInformation->aSearchListNames[iter] =
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Dns_NameCopyAllocate(
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pSearchList->SearchNameArray[iter].pszName,
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0,
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DnsCharSetUtf8,
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DnsCharSetUtf8 );
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}
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if ( pSearchInformation->aSearchListNames[iter] )
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{
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pSearchInformation->cNameCount++;
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}
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}
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return pSearchInformation;
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}
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PDNS_ADAPTER_INFORMATION
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CreateAdapterInformation(
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IN DWORD cServerCount,
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IN DWORD dwFlags,
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IN LPSTR pszDomain,
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IN LPSTR pszGuidName
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)
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/*++
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Routine Description:
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None.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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PDNS_ADAPTER_INFORMATION pAdapter = NULL;
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DWORD dwAdapterInfoBufLen = sizeof( DNS_ADAPTER_INFORMATION ) -
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sizeof( DNS_SERVER_INFORMATION ) +
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( sizeof( DNS_SERVER_INFORMATION ) *
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cServerCount );
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pAdapter = (PDNS_ADAPTER_INFORMATION)
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ALLOCATE_HEAP_ZERO( dwAdapterInfoBufLen );
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if ( ! pAdapter )
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{
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return NULL;
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}
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pAdapter->InfoFlags = dwFlags;
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pAdapter->cServerCount = 0;
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if ( pszDomain )
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{
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pAdapter->pszDomain = Dns_NameCopyAllocate(
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pszDomain,
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0,
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DnsCharSetUtf8,
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DnsCharSetUtf8 );
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}
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if ( pszGuidName )
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{
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pAdapter->pszAdapterGuidName = Dns_NameCopyAllocate(
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pszGuidName,
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0,
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DnsCharSetUtf8,
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DnsCharSetUtf8 );
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}
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return pAdapter;
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}
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PDNS_ADAPTER_INFORMATION
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CreateAdapterInformationCopyFromList(
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IN PDNS_ADAPTER pAdapter
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)
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/*++
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Routine Description:
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None.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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PDNS_ADAPTER_INFORMATION pAdapterInformation;
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DWORD iter;
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if ( ! pAdapter )
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{
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return NULL;
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}
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pAdapterInformation = CreateAdapterInformation(
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pAdapter->ServerCount,
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pAdapter->InfoFlags,
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pAdapter->pszAdapterDomain,
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pAdapter->pszAdapterGuidName );
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if ( ! pAdapterInformation )
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{
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return NULL;
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}
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pAdapterInformation->pIPAddresses =
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Dns_CreateIpArrayCopy( pAdapter->pAdapterIPAddresses );
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pAdapterInformation->pIPSubnetMasks =
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Dns_CreateIpArrayCopy( pAdapter->pAdapterIPSubnetMasks );
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for ( iter = 0; iter < pAdapter->ServerCount; iter++ )
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{
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pAdapterInformation->aipServers[iter].ipAddress =
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pAdapter->ServerArray[iter].IpAddress;
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pAdapterInformation->aipServers[iter].Priority =
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pAdapter->ServerArray[iter].Priority;
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}
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pAdapterInformation->cServerCount = pAdapter->ServerCount;
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return pAdapterInformation ;
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}
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PDNS_NETWORK_INFORMATION
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WINAPI
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GetNetworkInformation(
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VOID )
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/*++
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Routine Description:
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None.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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PDNS_NETINFO pNetInfo = GetNetworkInfo();
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DWORD iter;
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PDNS_NETWORK_INFORMATION pNetworkInformation = NULL;
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if ( !pNetInfo )
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{
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return NULL;
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}
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//
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// create Network Information of desired size
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// then copy entire structure
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//
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pNetworkInformation = CreateNetworkInformation( pNetInfo->AdapterCount );
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if ( ! pNetworkInformation )
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{
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goto Done;
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}
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pNetworkInformation->pSearchInformation =
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CreateSearchInformationCopyFromList( pNetInfo->pSearchList );
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for ( iter = 0; iter < pNetInfo->AdapterCount; iter++ )
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{
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pNetworkInformation->aAdapterInfoList[iter] =
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CreateAdapterInformationCopyFromList( pNetInfo->AdapterArray[iter] );
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if ( pNetworkInformation->aAdapterInfoList[iter] )
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{
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pNetworkInformation->cAdapterCount += 1;
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}
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}
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Done:
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NetInfo_Free( pNetInfo );
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return pNetworkInformation;
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}
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PDNS_SEARCH_INFORMATION
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WINAPI
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GetSearchInformation(
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VOID )
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/*++
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Routine Description:
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None.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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PDNS_NETINFO pNetInfo = GetNetworkInfo();
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PDNS_SEARCH_INFORMATION pSearchInformation = NULL;
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if ( !pNetInfo )
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{
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return NULL;
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}
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pSearchInformation = CreateSearchInformationCopyFromList(
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pNetInfo->pSearchList );
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NetInfo_Free( pNetInfo );
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return pSearchInformation;
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}
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VOID
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WINAPI
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FreeAdapterInformation(
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IN PDNS_ADAPTER_INFORMATION pAdapterInformation
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)
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/*++
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Routine Description:
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None.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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if ( pAdapterInformation )
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{
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if ( pAdapterInformation->pszAdapterGuidName )
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{
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FREE_HEAP( pAdapterInformation->pszAdapterGuidName );
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}
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if ( pAdapterInformation->pszDomain )
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{
|
||
|
|
FREE_HEAP( pAdapterInformation->pszDomain );
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( pAdapterInformation->pIPAddresses )
|
||
|
|
{
|
||
|
|
FREE_HEAP( pAdapterInformation->pIPAddresses );
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( pAdapterInformation->pIPSubnetMasks )
|
||
|
|
{
|
||
|
|
FREE_HEAP( pAdapterInformation->pIPSubnetMasks );
|
||
|
|
}
|
||
|
|
|
||
|
|
FREE_HEAP( pAdapterInformation );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
VOID
|
||
|
|
WINAPI
|
||
|
|
FreeSearchInformation(
|
||
|
|
IN PDNS_SEARCH_INFORMATION pSearchInformation
|
||
|
|
)
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
{
|
||
|
|
DWORD iter;
|
||
|
|
|
||
|
|
if ( pSearchInformation )
|
||
|
|
{
|
||
|
|
if ( pSearchInformation->pszPrimaryDomainName )
|
||
|
|
{
|
||
|
|
FREE_HEAP( pSearchInformation->pszPrimaryDomainName );
|
||
|
|
}
|
||
|
|
|
||
|
|
for ( iter = 0; iter < pSearchInformation->cNameCount; iter++ )
|
||
|
|
{
|
||
|
|
if ( pSearchInformation->aSearchListNames[iter] )
|
||
|
|
{
|
||
|
|
FREE_HEAP( pSearchInformation->aSearchListNames[iter] );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
FREE_HEAP( pSearchInformation );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
VOID
|
||
|
|
WINAPI
|
||
|
|
FreeNetworkInformation(
|
||
|
|
IN PDNS_NETWORK_INFORMATION pNetworkInformation
|
||
|
|
)
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
{
|
||
|
|
DWORD iter;
|
||
|
|
|
||
|
|
if ( pNetworkInformation )
|
||
|
|
{
|
||
|
|
FreeSearchInformation( pNetworkInformation->pSearchInformation );
|
||
|
|
|
||
|
|
for ( iter = 0; iter < pNetworkInformation->cAdapterCount; iter++ )
|
||
|
|
{
|
||
|
|
FreeAdapterInformation( pNetworkInformation ->
|
||
|
|
aAdapterInfoList[iter] );
|
||
|
|
}
|
||
|
|
|
||
|
|
FREE_HEAP( pNetworkInformation );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Net failure caching
|
||
|
|
//
|
||
|
|
|
||
|
|
BOOL
|
||
|
|
IsKnownNetFailure(
|
||
|
|
VOID
|
||
|
|
)
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
{
|
||
|
|
BOOL flag = FALSE;
|
||
|
|
|
||
|
|
DNSDBG( TRACE, ( "IsKnownNetFailure()\n" ));
|
||
|
|
|
||
|
|
EnterCriticalSection( &g_NetFailureCS );
|
||
|
|
|
||
|
|
if ( g_NetFailureStatus )
|
||
|
|
{
|
||
|
|
if ( g_NetFailureTime < Dns_GetCurrentTimeInSeconds() )
|
||
|
|
{
|
||
|
|
g_NetFailureTime = 0;
|
||
|
|
g_NetFailureStatus = ERROR_SUCCESS;
|
||
|
|
flag = FALSE;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
SetLastError( g_NetFailureStatus );
|
||
|
|
flag = TRUE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
LeaveCriticalSection( &g_NetFailureCS );
|
||
|
|
|
||
|
|
return flag;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
VOID
|
||
|
|
SetKnownNetFailure(
|
||
|
|
IN DNS_STATUS Status
|
||
|
|
)
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
None.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
{
|
||
|
|
DNSDBG( TRACE, ( "SetKnownNetFailure()\n" ));
|
||
|
|
|
||
|
|
EnterCriticalSection( &g_NetFailureCS );
|
||
|
|
|
||
|
|
g_NetFailureTime = Dns_GetCurrentTimeInSeconds() +
|
||
|
|
DNS_NET_FAILURE_CACHE_TIME;
|
||
|
|
g_NetFailureStatus = Status;
|
||
|
|
|
||
|
|
LeaveCriticalSection( &g_NetFailureCS );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
BOOL
|
||
|
|
WINAPI
|
||
|
|
DnsGetCacheDataTable(
|
||
|
|
OUT PDNS_CACHE_TABLE * ppTable
|
||
|
|
)
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
Get cache data table.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
ppTable -- address to receive ptr to cache data table
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
ERROR_SUCCES if successful.
|
||
|
|
Error code on failure.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
{
|
||
|
|
DNS_STATUS status = ERROR_SUCCESS;
|
||
|
|
DWORD rpcStatus = ERROR_SUCCESS;
|
||
|
|
PDNS_RPC_CACHE_TABLE pcacheTable = NULL;
|
||
|
|
|
||
|
|
DNSDBG( TRACE, ( "DnsGetCacheDataTable()\n" ));
|
||
|
|
|
||
|
|
if ( ! ppTable )
|
||
|
|
{
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
#if DNSBUILDOLD
|
||
|
|
if ( g_IsWin9X )
|
||
|
|
{
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
RpcTryExcept
|
||
|
|
{
|
||
|
|
status = CRrReadCache( NULL, &pcacheTable );
|
||
|
|
}
|
||
|
|
RpcExcept( DNS_RPC_EXCEPTION_FILTER )
|
||
|
|
{
|
||
|
|
status = RpcExceptionCode();
|
||
|
|
}
|
||
|
|
RpcEndExcept
|
||
|
|
|
||
|
|
// set out param
|
||
|
|
|
||
|
|
*ppTable = (PDNS_CACHE_TABLE) pcacheTable;
|
||
|
|
|
||
|
|
#if DBG
|
||
|
|
if ( status != ERROR_SUCCESS )
|
||
|
|
{
|
||
|
|
DNSDBG( RPC, (
|
||
|
|
"DnsGetCacheDataTable() status = %d\n",
|
||
|
|
status ));
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return( pcacheTable && status == ERROR_SUCCESS );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
BOOL
|
||
|
|
IsLocalIpAddress(
|
||
|
|
IN IP_ADDRESS IpAddress
|
||
|
|
)
|
||
|
|
|
||
|
|
//
|
||
|
|
// DCR_FIX: this has no customers other than debug code in update.c
|
||
|
|
//
|
||
|
|
// If wanted this API it should be remoteable -- we could avoid alloc
|
||
|
|
// and include IP6
|
||
|
|
//
|
||
|
|
|
||
|
|
{
|
||
|
|
BOOL bfound = FALSE;
|
||
|
|
PIP_ARRAY ipList = Dns_GetLocalIpAddressArray();
|
||
|
|
DWORD iter;
|
||
|
|
|
||
|
|
if ( !ipList )
|
||
|
|
{
|
||
|
|
return bfound;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// check if IpAddress is in local list
|
||
|
|
//
|
||
|
|
|
||
|
|
for ( iter = 0; iter < ipList->AddrCount; iter++ )
|
||
|
|
{
|
||
|
|
if ( IpAddress == ipList->AddrArray[iter] )
|
||
|
|
{
|
||
|
|
bfound = TRUE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
FREE_HEAP( ipList );
|
||
|
|
|
||
|
|
return bfound;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// End dnsapi.c
|
||
|
|
//
|