658 lines
12 KiB
C
658 lines
12 KiB
C
/*++
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Copyright (c) 1998 Microsoft Corporation
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Module Name:
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iphlpapi\lanmap.c
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Abstract:
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This module maps lan adapter GUIDs to friendly names.
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Revision History:
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AmritanR Created
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--*/
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#include "inc.h"
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LIST_ENTRY g_LanGuidHashTable[LAN_HASH_TABLE_SIZE];
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LIST_ENTRY g_LanNameHashTable[LAN_HASH_TABLE_SIZE];
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CRITICAL_SECTION g_LanTableLock;
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ULONG
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__inline
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LAN_NAME_HASH(
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IN PWCHAR pwszName
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)
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{
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ULONG ulLen, ulNumChars, i, ulIndex = 0;
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ulLen = wcslen(pwszName);
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ulNumChars = ulLen < 6 ? ulLen : 6;
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ulLen--;
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for(i = 0; i < ulNumChars; i++)
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{
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ulIndex += pwszName[i];
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ulIndex += pwszName[ulLen - i];
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}
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return ulIndex % LAN_HASH_TABLE_SIZE;
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}
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DWORD
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InitLanNameMapper(
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VOID
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)
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{
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ULONG i;
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for(i = 0; i < LAN_HASH_TABLE_SIZE; i ++)
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{
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InitializeListHead(&(g_LanGuidHashTable[i]));
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InitializeListHead(&(g_LanNameHashTable[i]));
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}
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InitializeCriticalSection(&g_LanTableLock);
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return NO_ERROR;
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}
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VOID
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DeinitLanNameMapper(
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VOID
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)
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{
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ULONG i;
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for(i = 0; i < LAN_HASH_TABLE_SIZE; i ++)
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{
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while(!IsListEmpty(&(g_LanGuidHashTable[i])))
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{
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PLIST_ENTRY pleNode;
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pleNode = RemoveHeadList(&(g_LanGuidHashTable[i]));
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HeapFree(g_hPrivateHeap,
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0,
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pleNode);
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}
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}
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DeleteCriticalSection(&g_LanTableLock);
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}
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DWORD
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OpenConnectionKey(
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IN GUID *pGuid,
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OUT PHKEY phkey
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)
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{
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WCHAR wszRegPath[256];
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WCHAR wszGuid[40];
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DWORD dwResult;
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*phkey = NULL;
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ConvertGuidToString(pGuid,
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wszGuid);
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wsprintfW(wszRegPath,
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CONN_KEY_FORMAT_W,
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wszGuid);
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dwResult = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
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wszRegPath,
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0,
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KEY_READ,
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phkey);
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return dwResult;
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}
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DWORD
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NhiGetLanConnectionNameFromGuid(
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IN GUID *pGuid,
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OUT PWCHAR pwszBuffer,
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IN OUT PULONG pulBufferLength,
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IN BOOL bRefresh,
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IN BOOL bCache
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)
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{
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DWORD dwType, dwResult;
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HKEY hkey;
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PLAN_NODE pNode;
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if(*pulBufferLength < (MAX_INTERFACE_NAME_LEN * sizeof(WCHAR)))
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{
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return ERROR_INSUFFICIENT_BUFFER;
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}
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if(!bCache)
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{
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dwResult = OpenConnectionKey(pGuid,
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&hkey);
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if(dwResult isnot NO_ERROR)
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{
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return dwResult;
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}
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dwResult = RegQueryValueExW(hkey,
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REG_VALUE_CONN_NAME_W,
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NULL,
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&dwType,
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(LPBYTE)pwszBuffer,
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pulBufferLength);
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RegCloseKey(hkey);
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if(dwResult isnot NO_ERROR)
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{
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return dwResult;
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}
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if(dwType isnot REG_SZ)
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{
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return ERROR_REGISTRY_CORRUPT;
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}
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return NO_ERROR;
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}
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//
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// Lock the table
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//
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EnterCriticalSection(&g_LanTableLock);
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if(bRefresh)
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{
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//
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// refresh the cache
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//
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dwResult = UpdateLanLookupTable();
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if(dwResult isnot NO_ERROR)
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{
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LeaveCriticalSection(&g_LanTableLock);
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return dwResult;
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}
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}
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//
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// Now lookup the table
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//
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pNode = LookupLanNodeByGuid(pGuid);
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if(pNode is NULL)
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{
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LeaveCriticalSection(&g_LanTableLock);
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return ERROR_NOT_FOUND;
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}
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wcscpy(pwszBuffer,
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pNode->rgwcName);
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LeaveCriticalSection(&g_LanTableLock);
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return NO_ERROR;
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}
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DWORD
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NhiGetGuidFromLanConnectionName(
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IN PWCHAR pwszName,
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OUT GUID *pGuid,
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IN BOOL bRefresh,
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IN BOOL bCache
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)
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{
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DWORD dwResult;
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PLAN_NODE pNode;
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//
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// Lock the table
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//
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EnterCriticalSection(&g_LanTableLock);
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if(bRefresh)
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{
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//
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// refresh the cache
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//
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dwResult = UpdateLanLookupTable();
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if(dwResult isnot NO_ERROR)
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{
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LeaveCriticalSection(&g_LanTableLock);
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return dwResult;
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}
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}
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//
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// Now lookup the table
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//
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pNode = LookupLanNodeByName(pwszName);
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if(pNode is NULL)
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{
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LeaveCriticalSection(&g_LanTableLock);
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return ERROR_NOT_FOUND;
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}
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*pGuid = pNode->Guid;
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LeaveCriticalSection(&g_LanTableLock);
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return NO_ERROR;
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}
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DWORD
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NhiGetLanConnectionDescriptionFromGuid(
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IN GUID *pGuid,
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OUT PWCHAR pwszBuffer,
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IN OUT PULONG pulBufferSize,
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IN BOOL bCache,
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IN BOOL bRefresh
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)
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{
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return NO_ERROR;
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}
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PLAN_NODE
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LookupLanNodeByGuid(
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IN GUID *pGuid
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)
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/*++
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Routine Description:
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Looks up the ipip node in the hash table
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Locks:
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Called with the ipip table lock held
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Arguments:
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pGuid Guid for the node
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Return Value:
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LanNode if found
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NULL otherwise
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--*/
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{
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ULONG ulIndex;
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PLIST_ENTRY pleNode;
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ulIndex = LAN_GUID_HASH(pGuid);
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for(pleNode = g_LanGuidHashTable[ulIndex].Flink;
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pleNode isnot &(g_LanGuidHashTable[ulIndex]);
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pleNode = pleNode->Flink)
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{
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PLAN_NODE pLanNode;
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pLanNode = CONTAINING_RECORD(pleNode,
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LAN_NODE,
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leGuidLink);
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if(IsEqualGUID(&(pLanNode->Guid),
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pGuid))
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{
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return pLanNode;
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}
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}
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return NULL;
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}
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PLAN_NODE
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LookupLanNodeByName(
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IN PWCHAR pwszName
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)
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/*++
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Routine Description:
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Looks up the ipip node in the hash table
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Locks:
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Called with the ipip table lock held
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Arguments:
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pwszName Name of the phonebook entry
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Return Value:
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RasNode if found
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NULL otherwise
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--*/
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{
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ULONG ulIndex;
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PLIST_ENTRY pleNode;
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ulIndex = LAN_NAME_HASH(pwszName);
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for(pleNode = g_LanNameHashTable[ulIndex].Flink;
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pleNode isnot &(g_LanNameHashTable[ulIndex]);
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pleNode = pleNode->Flink)
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{
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PLAN_NODE pLanNode;
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pLanNode = CONTAINING_RECORD(pleNode,
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LAN_NODE,
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leNameLink);
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if(_wcsicmp(pLanNode->rgwcName,
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pwszName) is 0)
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{
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return pLanNode;
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}
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}
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return NULL;
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}
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DWORD
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AddLanNode(
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IN GUID *pGuid,
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IN PWCHAR pwszName
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)
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/*++
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Routine Description:
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Creates a node in the hash table for the given ipip info
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Locks:
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Called with the LAN table lock held
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Arguments:
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pInfo Lan name info
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Return Value:
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NO_ERROR
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ERROR_NOT_ENOUGH_MEMORY
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--*/
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{
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ULONG ulGuidIndex, ulNameIndex;
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PLAN_NODE pLanNode;
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pLanNode = HeapAlloc(g_hPrivateHeap,
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0,
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sizeof(LAN_NODE));
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if(pLanNode is NULL)
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{
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return ERROR_NOT_ENOUGH_MEMORY;
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}
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pLanNode->Guid = *pGuid;
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wcscpy(pLanNode->rgwcName,
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pwszName);
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ulGuidIndex = LAN_GUID_HASH(pGuid);
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ulNameIndex = LAN_NAME_HASH(pwszName);
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InsertHeadList(&(g_LanGuidHashTable[ulGuidIndex]),
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&(pLanNode->leGuidLink));
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InsertHeadList(&(g_LanNameHashTable[ulNameIndex]),
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&(pLanNode->leNameLink));
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return NO_ERROR;
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}
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VOID
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RemoveLanNode(
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IN PLAN_NODE pNode
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)
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/*++
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Routine Description:
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Removes the given node from the hash tables
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Locks:
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Called with the LAN table lock held
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Arguments:
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pNode Node to remove
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Return Value:
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None
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--*/
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{
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RemoveEntryList(&(pNode->leGuidLink));
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RemoveEntryList(&(pNode->leNameLink));
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}
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DWORD
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UpdateLanLookupTable(
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VOID
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)
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/*++
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Routine Description:
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This routine is invoked to retrieve an array of LAN connections,
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Arguments:
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None
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Return Value:
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DWORD - Win32 status code.
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--*/
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{
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BOOLEAN bCleanupOle = TRUE;
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ULONG ulConCount;
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HRESULT hrErr;
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ULONG i, j;
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DWORD dwResult;
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NETCON_STATUS ncs;
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NTSTATUS status;
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INetConnection *rgpConArray[32];
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NETCON_PROPERTIES *pLanProps;
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INetConnectionManager *pConMan = NULL;
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IEnumNetConnection *pEnumCon = NULL;
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UNICODE_STRING UnicodeString;
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hrErr = CoInitializeEx(NULL,
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COINIT_MULTITHREADED|COINIT_DISABLE_OLE1DDE);
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if(!SUCCEEDED(hrErr))
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{
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if(hrErr is RPC_E_CHANGED_MODE)
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{
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bCleanupOle = FALSE;
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}
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else
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{
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return ERROR_CAN_NOT_COMPLETE;
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}
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}
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i = 0;
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do
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{
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//
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// Instantiate the connection manager
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//
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hrErr = CoCreateInstance(&CLSID_ConnectionManager,
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NULL,
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CLSCTX_SERVER,
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&IID_INetConnectionManager,
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(PVOID*)&pConMan);
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if(!SUCCEEDED(hrErr))
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{
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pConMan = NULL;
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break;
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}
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//
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// Instantiate a connection-enumerator
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//
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hrErr = INetConnectionManager_EnumConnections(pConMan,
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NCME_DEFAULT,
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&pEnumCon);
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if(!SUCCEEDED(hrErr))
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{
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pEnumCon = NULL;
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break;
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}
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hrErr = CoSetProxyBlanket((IUnknown*)pEnumCon,
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RPC_C_AUTHN_WINNT,
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RPC_C_AUTHN_NONE,
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NULL,
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RPC_C_AUTHN_LEVEL_CALL,
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RPC_C_IMP_LEVEL_IMPERSONATE,
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NULL,
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EOAC_NONE);
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//
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// Enumerate the items
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//
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while(TRUE)
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{
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hrErr = IEnumNetConnection_Next(pEnumCon,
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sizeof(rgpConArray)/sizeof(rgpConArray[0]),
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rgpConArray,
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&ulConCount);
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if(!SUCCEEDED(hrErr) or
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!ulConCount)
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{
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hrErr = S_OK;
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break;
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}
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//
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// Examine the properties for the connections retrieved
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//
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for(j = 0; j < ulConCount; j++)
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{
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hrErr = INetConnection_GetProperties(rgpConArray[j],
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&pLanProps);
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INetConnection_Release(rgpConArray[j]);
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if(SUCCEEDED(hrErr) and
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pLanProps->MediaType is NCM_LAN)
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{
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PLAN_NODE pNode;
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pNode = LookupLanNodeByGuid(&(pLanProps->guidId));
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if(!pNode)
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{
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dwResult = AddLanNode(&(pLanProps->guidId),
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pLanProps->pszwName);
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}
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else
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{
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//
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// Node exists, if different remove and re-add
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//
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if(_wcsicmp(pNode->rgwcName,
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pLanProps->pszwName) isnot 0)
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{
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RemoveLanNode(pNode);
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dwResult = AddLanNode(&(pLanProps->guidId),
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pLanProps->pszwName);
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}
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}
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}
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CoTaskMemFree(pLanProps->pszwName);
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CoTaskMemFree(pLanProps->pszwDeviceName);
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CoTaskMemFree(pLanProps);
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}
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}
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} while(FALSE);
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if(pEnumCon)
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{
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IEnumNetConnection_Release(pEnumCon);
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}
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if(pConMan)
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{
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INetConnectionManager_Release(pConMan);
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}
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if(bCleanupOle)
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{
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CoUninitialize();
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}
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return NO_ERROR;
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}
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