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// UsbDkHelper.cpp : Defines the exported functions for the DLL application.
#include "stdafx.h"
#include "UsbDkHelper.h"
#include "Installer.h"
#include "DriverAccess.h"
#include "RedirectorAccess.h"
//-------------------------------------------------------------------------------------------
typedef struct tag_REDIRECTED_DEVICE_HANDLE
{
USB_DK_DEVICE_ID DeviceID;
unique_ptr<UsbDkRedirectorAccess> RedirectorAccess;
} REDIRECTED_DEVICE_HANDLE, PREDIRECTED_DEVICE_HANDLE;
//-------------------------------------------------------------------------------------------
void printExceptionString(const char *errorStr)
{
auto tString = string2tstring(string(errorStr));
OutputDebugString(tString.c_str());
tcout << tString;
}
//------------------------------------------------------------------------------------------
InstallResult InstallDriver(void)
{
try
{
UsbDkInstaller installer;
return installer.Install() ? InstallSuccess : InstallFailureNeedReboot;
}
catch (const exception &e)
{
printExceptionString(e.what());
UninstallDriver();
return InstallFailure;
}
}
//-------------------------------------------------------------------------------------------
BOOL UninstallDriver(void)
{
try
{
UsbDkInstaller installer;
installer.Uninstall();
return TRUE;
}
catch (const exception &e)
{
printExceptionString(e.what());
return FALSE;
}
}
//-------------------------------------------------------------------------------------------
DLL BOOL GetConfigurationDescriptor(PUSB_DK_CONFIG_DESCRIPTOR_REQUEST Request,
PUSB_CONFIGURATION_DESCRIPTOR *Descriptor,
PULONG Length)
{
try
{
UsbDkDriverAccess driver;
*Descriptor = driver.GetConfigurationDescriptor(*Request, *Length);
return TRUE;
}
catch (const exception &e)
{
printExceptionString(e.what());
return FALSE;
}
}
//-------------------------------------------------------------------------------------------
DLL void ReleaseConfigurationDescriptor(PUSB_CONFIGURATION_DESCRIPTOR Descriptor)
{
try
{
UsbDkDriverAccess::ReleaseConfigurationDescriptor(Descriptor);
}
catch (const exception &e)
{
printExceptionString(e.what());
}
}
//-------------------------------------------------------------------------------------------
BOOL GetDevicesList(PUSB_DK_DEVICE_INFO *DevicesArray, PULONG NumberDevices)
{
try
{
UsbDkDriverAccess driver;
driver.GetDevicesList(*DevicesArray, *NumberDevices);
return TRUE;
}
catch (const exception &e)
{
printExceptionString(e.what());
return FALSE;
}
}
//-------------------------------------------------------------------------------------------
void ReleaseDeviceList(PUSB_DK_DEVICE_INFO DevicesArray)
{
try
{
UsbDkDriverAccess::ReleaseDeviceList(DevicesArray);
}
catch (const exception &e)
{
printExceptionString(e.what());
}
}
//-------------------------------------------------------------------------------------------
static UsbDkRedirectorAccess* ConnectToRedirector(ULONG RedirectorID)
{
// Although we got notification from driver regarding redirection creation
// system requires some (rather short) time to get the device ready for requests processing.
// In case of unfortunate timing we may try to open the redirector device symlink before
// it is ready, in this case we get ERROR_FILE_NOT_FOUND.
// Unfortunately it looks like there is no way to ensure device is ready but spin around
// and poll it for some time.
static const int NumRetries = 100;
static const int TimeoutMS = 50;
int RetryNumber = 0;
for (;;)
{
try
{
return new UsbDkRedirectorAccess(RedirectorID);
}
catch (const UsbDkDriverFileException& e)
{
if ((e.GetErrorCode() != ERROR_FILE_NOT_FOUND) || (++RetryNumber == NumRetries))
{
OutputDebugString(TEXT("Cannot connect to the redirector, gave up."));
throw;
}
}
OutputDebugString(TEXT("Cannot connect to the redirector, will wait and try again..."));
Sleep(TimeoutMS);
}
}
HANDLE StartRedirect(PUSB_DK_DEVICE_ID DeviceID)
{
bool bRedirectAdded = false;
try
{
UsbDkDriverAccess driverAccess;
auto RedirectorID = driverAccess.AddRedirect(*DeviceID);
bRedirectAdded = true;
unique_ptr<REDIRECTED_DEVICE_HANDLE> deviceHandle(new REDIRECTED_DEVICE_HANDLE);
deviceHandle->DeviceID = *DeviceID;
deviceHandle->RedirectorAccess.reset(ConnectToRedirector(RedirectorID));
return reinterpret_cast<HANDLE>(deviceHandle.release());
}
catch (const exception &e)
{
printExceptionString(e.what());
}
if (bRedirectAdded)
{
try
{
UsbDkDriverAccess driverAccess;
driverAccess.RemoveRedirect(*DeviceID);
}
catch (const exception &e)
{
printExceptionString(e.what());
}
}
return nullptr;
}
//-------------------------------------------------------------------------------------------
BOOL StopRedirect(HANDLE DeviceHandle)
{
try
{
UsbDkDriverAccess driverAccess;
unique_ptr<REDIRECTED_DEVICE_HANDLE> deviceHandle(reinterpret_cast<REDIRECTED_DEVICE_HANDLE*>(DeviceHandle));
deviceHandle->RedirectorAccess.reset();
driverAccess.RemoveRedirect(deviceHandle->DeviceID);
return TRUE;
}
catch (const exception &e)
{
printExceptionString(e.what());
return FALSE;
}
}
//-------------------------------------------------------------------------------------------
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