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DeviceNameResolver.cpp
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DeviceNameResolver.cpp
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#include "DeviceNameResolver.h"
#include "NativeWinApi.h"
DeviceNameResolver::DeviceNameResolver()
{
NativeWinApi::initialize();
initDeviceNameList();
}
DeviceNameResolver::~DeviceNameResolver()
{
deviceNameList.clear();
}
void DeviceNameResolver::initDeviceNameList()
{
TCHAR shortName[3] = {0};
TCHAR longName[MAX_PATH] = {0};
HardDisk hardDisk;
shortName[1] = TEXT(':');
deviceNameList.reserve(3);
for ( TCHAR shortD = TEXT('a'); shortD < TEXT('z'); shortD++ )
{
shortName[0] = shortD;
if (QueryDosDevice( shortName, longName, MAX_PATH ) > 0)
{
hardDisk.shortName[0] = _totupper(shortD);
hardDisk.shortName[1] = TEXT(':');
hardDisk.shortName[2] = 0;
hardDisk.longNameLength = _tcslen(longName);
_tcscpy_s(hardDisk.longName, longName);
deviceNameList.push_back(hardDisk);
}
}
fixVirtualDevices();
}
bool DeviceNameResolver::resolveDeviceLongNameToShort(const TCHAR * sourcePath, TCHAR * targetPath)
{
for (unsigned int i = 0; i < deviceNameList.size(); i++)
{
if (!_tcsnicmp(deviceNameList[i].longName, sourcePath, deviceNameList[i].longNameLength))
{
_tcscpy_s(targetPath, MAX_PATH, deviceNameList[i].shortName);
_tcscat_s(targetPath, MAX_PATH, sourcePath + deviceNameList[i].longNameLength);
return true;
}
}
return false;
}
void DeviceNameResolver::fixVirtualDevices()
{
const USHORT BufferSize = MAX_PATH * 2 * sizeof(WCHAR);
WCHAR longCopy[MAX_PATH] = {0};
OBJECT_ATTRIBUTES oa = {0};
UNICODE_STRING unicodeInput = {0};
UNICODE_STRING unicodeOutput = {0};
HANDLE hFile = 0;
ULONG retLen = 0;
HardDisk hardDisk;
unicodeOutput.Buffer = (PWSTR)malloc(BufferSize);
if (!unicodeOutput.Buffer)
return;
for (unsigned int i = 0; i < deviceNameList.size(); i++)
{
wcscpy_s(longCopy, deviceNameList[i].longName);
NativeWinApi::RtlInitUnicodeString(&unicodeInput, longCopy);
InitializeObjectAttributes(&oa, &unicodeInput, 0, 0, 0);
if(NT_SUCCESS(NativeWinApi::NtOpenSymbolicLinkObject(&hFile, SYMBOLIC_LINK_QUERY, &oa)))
{
unicodeOutput.Length = BufferSize;
unicodeOutput.MaximumLength = unicodeOutput.Length;
ZeroMemory(unicodeOutput.Buffer, unicodeOutput.Length);
if (NT_SUCCESS(NativeWinApi::NtQuerySymbolicLinkObject(hFile, &unicodeOutput, &retLen)))
{
hardDisk.longNameLength = wcslen(unicodeOutput.Buffer);
wcscpy_s(hardDisk.shortName, deviceNameList[i].shortName);
wcscpy_s(hardDisk.longName, unicodeOutput.Buffer);
deviceNameList.push_back(hardDisk);
}
NativeWinApi::NtClose(hFile);
}
}
free(unicodeOutput.Buffer);
}

File Metadata

Mime Type
text/x-c
Expires
Tue, Feb 10, 3:50 AM (18 h, 24 m)
Storage Engine
local-disk
Storage Format
Raw Data
Storage Handle
13/74/7f6f5bb678096e931e64b53a6036

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