text: /**
   * FreeRDP: A Remote Desktop Protocol Implementation
   * RAIL Virtual Channel Plugin
   *
   * Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
   * Copyright 2011 Roman Barabanov <romanbarabanov@gmail.com>
   * Copyright 2011 Vic Lee
   * Copyright 2015 Thincast Technologies GmbH
   * Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
   * Copyright 2017 Armin Novak <armin.novak@thincast.com>
   * Copyright 2017 Thincast Technologies GmbH
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #ifdef HAVE_CONFIG_H
  #include "config.h"
  #endif
  
  #include <winpr/crt.h>
  
  #include <freerdp/types.h>
  #include <freerdp/constants.h>
  
  #include "rail_orders.h"
  #include "rail_main.h"
  
  #include "../../../channels/client/addin.h"
  
  RailClientContext* rail_get_client_interface(railPlugin* rail)
  {
  	RailClientContext* pInterface;
  
  	if (!rail)
  		return NULL;
  
  	pInterface = (RailClientContext*)rail->channelEntryPoints.pInterface;
  	return pInterface;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_send(railPlugin* rail, wStream* s)
  {
  	UINT status;
  
  	if (!rail)
  	{
  		Stream_Free(s, TRUE);
  		return CHANNEL_RC_BAD_INIT_HANDLE;
  	}
  
  	status = rail->channelEntryPoints.pVirtualChannelWriteEx(
  	    rail->InitHandle, rail->OpenHandle, Stream_Buffer(s), (UINT32)Stream_GetPosition(s), s);
  
  	if (status != CHANNEL_RC_OK)
  	{
  		Stream_Free(s, TRUE);
  		WLog_ERR(TAG, "pVirtualChannelWriteEx failed with %s [%08" PRIX32 "]",
  		         WTSErrorToString(status), status);
  	}
  
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  UINT rail_send_channel_data(railPlugin* rail, wStream* src)
  {
  	wStream* s;
  	size_t length;
  
  	if (!rail || !src)
  		return ERROR_INVALID_PARAMETER;
  
  	length = Stream_GetPosition(src);
  	s = Stream_New(NULL, length);
  
  	if (!s)
  	{
  		WLog_ERR(TAG, "Stream_New failed!");
  		return CHANNEL_RC_NO_MEMORY;
  	}
  
  	Stream_Write(s, Stream_Buffer(src), length);
  	return rail_send(rail, s);
  }
  
  /**
   * Callback Interface
   */
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_client_execute(RailClientContext* context, const RAIL_EXEC_ORDER* exec)
  {
  	char* exeOrFile;
  	UINT error;
  	railPlugin* rail;
  	UINT16 flags;
  	RAIL_UNICODE_STRING ruExeOrFile = { 0 };
  	RAIL_UNICODE_STRING ruWorkingDir = { 0 };
  	RAIL_UNICODE_STRING ruArguments = { 0 };
  
  	if (!context || !exec)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	exeOrFile = exec->RemoteApplicationProgram;
  	flags = exec->flags;
  
  	if (!exeOrFile)
  		return ERROR_INVALID_PARAMETER;
  
  	if (!utf8_string_to_rail_string(exec->RemoteApplicationProgram,
  	                                &ruExeOrFile) || /* RemoteApplicationProgram */
  	    !utf8_string_to_rail_string(exec->RemoteApplicationWorkingDir,
  	                                &ruWorkingDir) || /* ShellWorkingDirectory */
  	    !utf8_string_to_rail_string(exec->RemoteApplicationArguments,
  	                                &ruArguments)) /* RemoteApplicationCmdLine */
  		error = ERROR_INTERNAL_ERROR;
  	else
  		error = rail_send_client_exec_order(rail, flags, &ruExeOrFile, &ruWorkingDir, &ruArguments);
  
  	free(ruExeOrFile.string);
  	free(ruWorkingDir.string);
  	free(ruArguments.string);
  	return error;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_client_activate(RailClientContext* context, const RAIL_ACTIVATE_ORDER* activate)
  {
  	railPlugin* rail;
  
  	if (!context || !activate)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_activate_order(rail, activate);
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_send_client_sysparam(RailClientContext* context, RAIL_SYSPARAM_ORDER* sysparam)
  {
  	wStream* s;
  	size_t length = RAIL_SYSPARAM_ORDER_LENGTH;
  	railPlugin* rail;
  	UINT error;
  	BOOL extendedSpiSupported;
  
  	if (!context || !sysparam)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  
  	switch (sysparam->param)
  	{
  		case SPI_SET_DRAG_FULL_WINDOWS:
  		case SPI_SET_KEYBOARD_CUES:
  		case SPI_SET_KEYBOARD_PREF:
  		case SPI_SET_MOUSE_BUTTON_SWAP:
  			length += 1;
  			break;
  
  		case SPI_SET_WORK_AREA:
  		case SPI_DISPLAY_CHANGE:
  		case SPI_TASKBAR_POS:
  			length += 8;
  			break;
  
  		case SPI_SET_HIGH_CONTRAST:
  			length += sysparam->highContrast.colorSchemeLength + 10;
  			break;
  
  		case SPI_SETFILTERKEYS:
  			length += 20;
  			break;
  
  		case SPI_SETSTICKYKEYS:
  		case SPI_SETCARETWIDTH:
  		case SPI_SETTOGGLEKEYS:
  			length += 4;
  			break;
  
  		default:
  			return ERROR_BAD_ARGUMENTS;
  	}
  
  	s = rail_pdu_init(length);
  
  	if (!s)
  	{
  		WLog_ERR(TAG, "rail_pdu_init failed!");
  		return CHANNEL_RC_NO_MEMORY;
  	}
  
  	extendedSpiSupported = rail_is_extended_spi_supported(rail->channelFlags);
  	if ((error = rail_write_sysparam_order(s, sysparam, extendedSpiSupported)))
  	{
  		WLog_ERR(TAG, "rail_write_client_sysparam_order failed with error %" PRIu32 "!", error);
  		Stream_Free(s, TRUE);
  		return error;
  	}
  
  	if ((error = rail_send_pdu(rail, s, TS_RAIL_ORDER_SYSPARAM)))
  	{
  		WLog_ERR(TAG, "rail_send_pdu failed with error %" PRIu32 "!", error);
  	}
  
  	Stream_Free(s, TRUE);
  	return error;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_client_system_param(RailClientContext* context,
                                       const RAIL_SYSPARAM_ORDER* sysInParam)
  {
  	UINT error = CHANNEL_RC_OK;
  	RAIL_SYSPARAM_ORDER sysparam;
  
  	if (!context || !sysInParam)
  		return ERROR_INVALID_PARAMETER;
  
  	sysparam = *sysInParam;
  
  	if (sysparam.params & SPI_MASK_SET_HIGH_CONTRAST)
  	{
  		sysparam.param = SPI_SET_HIGH_CONTRAST;
  
  		if ((error = rail_send_client_sysparam(context, &sysparam)))
  		{
  			WLog_ERR(TAG, "rail_send_client_sysparam failed with error %" PRIu32 "!", error);
  			return error;
  		}
  	}
  
  	if (sysparam.params & SPI_MASK_TASKBAR_POS)
  	{
  		sysparam.param = SPI_TASKBAR_POS;
  
  		if ((error = rail_send_client_sysparam(context, &sysparam)))
  		{
  			WLog_ERR(TAG, "rail_send_client_sysparam failed with error %" PRIu32 "!", error);
  			return error;
  		}
  	}
  
  	if (sysparam.params & SPI_MASK_SET_MOUSE_BUTTON_SWAP)
  	{
  		sysparam.param = SPI_SET_MOUSE_BUTTON_SWAP;
  
  		if ((error = rail_send_client_sysparam(context, &sysparam)))
  		{
  			WLog_ERR(TAG, "rail_send_client_sysparam failed with error %" PRIu32 "!", error);
  			return error;
  		}
  	}
  
  	if (sysparam.params & SPI_MASK_SET_KEYBOARD_PREF)
  	{
  		sysparam.param = SPI_SET_KEYBOARD_PREF;
  
  		if ((error = rail_send_client_sysparam(context, &sysparam)))
  		{
  			WLog_ERR(TAG, "rail_send_client_sysparam failed with error %" PRIu32 "!", error);
  			return error;
  		}
  	}
  
  	if (sysparam.params & SPI_MASK_SET_DRAG_FULL_WINDOWS)
  	{
  		sysparam.param = SPI_SET_DRAG_FULL_WINDOWS;
  
  		if ((error = rail_send_client_sysparam(context, &sysparam)))
  		{
  			WLog_ERR(TAG, "rail_send_client_sysparam failed with error %" PRIu32 "!", error);
  			return error;
  		}
  	}
  
  	if (sysparam.params & SPI_MASK_SET_KEYBOARD_CUES)
  	{
  		sysparam.param = SPI_SET_KEYBOARD_CUES;
  
  		if ((error = rail_send_client_sysparam(context, &sysparam)))
  		{
  			WLog_ERR(TAG, "rail_send_client_sysparam failed with error %" PRIu32 "!", error);
  			return error;
  		}
  	}
  
  	if (sysparam.params & SPI_MASK_SET_WORK_AREA)
  	{
  		sysparam.param = SPI_SET_WORK_AREA;
  
  		if ((error = rail_send_client_sysparam(context, &sysparam)))
  		{
  			WLog_ERR(TAG, "rail_send_client_sysparam failed with error %" PRIu32 "!", error);
  			return error;
  		}
  	}
  
  	return error;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_client_system_command(RailClientContext* context,
                                         const RAIL_SYSCOMMAND_ORDER* syscommand)
  {
  	railPlugin* rail;
  
  	if (!context || !syscommand)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_syscommand_order(rail, syscommand);
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_client_handshake(RailClientContext* context, const RAIL_HANDSHAKE_ORDER* handshake)
  {
  	railPlugin* rail;
  
  	if (!context || !handshake)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_handshake_order(rail, handshake);
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_client_notify_event(RailClientContext* context,
                                       const RAIL_NOTIFY_EVENT_ORDER* notifyEvent)
  {
  	railPlugin* rail;
  
  	if (!context || !notifyEvent)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_notify_event_order(rail, notifyEvent);
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_client_window_move(RailClientContext* context,
                                      const RAIL_WINDOW_MOVE_ORDER* windowMove)
  {
  	railPlugin* rail;
  
  	if (!context || !windowMove)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_window_move_order(rail, windowMove);
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_client_information(RailClientContext* context,
                                      const RAIL_CLIENT_STATUS_ORDER* clientStatus)
  {
  	railPlugin* rail;
  
  	if (!context || !clientStatus)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_status_order(rail, clientStatus);
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_client_system_menu(RailClientContext* context, const RAIL_SYSMENU_ORDER* sysmenu)
  {
  	railPlugin* rail;
  
  	if (!context || !sysmenu)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_sysmenu_order(rail, sysmenu);
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_client_language_bar_info(RailClientContext* context,
                                            const RAIL_LANGBAR_INFO_ORDER* langBarInfo)
  {
  	railPlugin* rail;
  
  	if (!context || !langBarInfo)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_langbar_info_order(rail, langBarInfo);
  }
  
  static UINT rail_client_language_ime_info(RailClientContext* context,
                                            const RAIL_LANGUAGEIME_INFO_ORDER* langImeInfo)
  {
  	railPlugin* rail;
  
  	if (!context || !langImeInfo)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_languageime_info_order(rail, langImeInfo);
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_client_get_appid_request(RailClientContext* context,
                                            const RAIL_GET_APPID_REQ_ORDER* getAppIdReq)
  {
  	railPlugin* rail;
  
  	if (!context || !getAppIdReq || !context->handle)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_get_appid_req_order(rail, getAppIdReq);
  }
  
  static UINT rail_client_compartment_info(RailClientContext* context,
                                           const RAIL_COMPARTMENT_INFO_ORDER* compartmentInfo)
  {
  	railPlugin* rail;
  
  	if (!context || !compartmentInfo || !context->handle)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_compartment_info_order(rail, compartmentInfo);
  }
  
  static UINT rail_client_cloak(RailClientContext* context, const RAIL_CLOAK* cloak)
  {
  	railPlugin* rail;
  
  	if (!context || !cloak || !context->handle)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_cloak_order(rail, cloak);
  }
  
  static UINT rail_client_snap_arrange(RailClientContext* context, const RAIL_SNAP_ARRANGE* snap)
  {
  	railPlugin* rail;
  
  	if (!context || !snap || !context->handle)
  		return ERROR_INVALID_PARAMETER;
  
  	rail = (railPlugin*)context->handle;
  	return rail_send_client_snap_arrange_order(rail, snap);
  }
  
  static VOID VCAPITYPE rail_virtual_channel_open_event_ex(LPVOID lpUserParam, DWORD openHandle,
                                                           UINT event, LPVOID pData,
                                                           UINT32 dataLength, UINT32 totalLength,
                                                           UINT32 dataFlags)
  {
  	UINT error = CHANNEL_RC_OK;
  	railPlugin* rail = (railPlugin*)lpUserParam;
  
  	switch (event)
  	{
  		case CHANNEL_EVENT_DATA_RECEIVED:
  			if (!rail || (rail->OpenHandle != openHandle))
  			{
  				WLog_ERR(TAG, "error no match");
  				return;
  			}
  
  			if ((error = channel_client_post_message(rail->MsgsHandle, pData, dataLength,
  			                                         totalLength, dataFlags)))
  			{
  				WLog_ERR(TAG,
  				         "rail_virtual_channel_event_data_received"
  				         " failed with error %" PRIu32 "!",
  				         error);
  			}
  
  			break;
  
  		case CHANNEL_EVENT_WRITE_CANCELLED:
  		case CHANNEL_EVENT_WRITE_COMPLETE:
  		{
  			wStream* s = (wStream*)pData;
  			Stream_Free(s, TRUE);
  		}
  		break;
  
  		case CHANNEL_EVENT_USER:
  			break;
  	}
  
  	if (error && rail && rail->rdpcontext)
  		setChannelError(rail->rdpcontext, error,
  		                "rail_virtual_channel_open_event reported an error");
  
  	return;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_virtual_channel_event_connected(railPlugin* rail, LPVOID pData, UINT32 dataLength)
  {
  	RailClientContext* context = rail_get_client_interface(rail);
  	UINT status;
  	status = rail->channelEntryPoints.pVirtualChannelOpenEx(rail->InitHandle, &rail->OpenHandle,
  	                                                        rail->channelDef.name,
  	                                                        rail_virtual_channel_open_event_ex);
  
  	if (status != CHANNEL_RC_OK)
  	{
  		WLog_ERR(TAG, "pVirtualChannelOpen failed with %s [%08" PRIX32 "]",
  		         WTSErrorToString(status), status);
  		return status;
  	}
  
  	if (context)
  	{
  		IFCALLRET(context->OnOpen, status, context, &rail->sendHandshake);
  
  		if (status != CHANNEL_RC_OK)
  			WLog_ERR(TAG, "context->OnOpen failed with %s [%08" PRIX32 "]",
  			         WTSErrorToString(status), status);
  	}
  	rail->MsgsHandle = channel_client_create_handler(rail->rdpcontext, rail, rail_order_recv,
  	                                                 RAIL_SVC_CHANNEL_NAME);
  
  	return CHANNEL_RC_OK;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT rail_virtual_channel_event_disconnected(railPlugin* rail)
  {
  	UINT rc;
  
  	if (rail->OpenHandle == 0)
  		return CHANNEL_RC_OK;
  
  	channel_client_quit_handler(rail->MsgsHandle);
  
  	rc = rail->channelEntryPoints.pVirtualChannelCloseEx(rail->InitHandle, rail->OpenHandle);
  
  	if (CHANNEL_RC_OK != rc)
  	{
  		WLog_ERR(TAG, "pVirtualChannelCloseEx failed with %s [%08" PRIX32 "]", WTSErrorToString(rc),
  		         rc);
  		return rc;
  	}
  
  	rail->OpenHandle = 0;
  
  
  	return CHANNEL_RC_OK;
  }
  
  static void rail_virtual_channel_event_terminated(railPlugin* rail)
  {
  	rail->InitHandle = 0;
  	free(rail->context);
  	free(rail);
  }
  
  static VOID VCAPITYPE rail_virtual_channel_init_event_ex(LPVOID lpUserParam, LPVOID pInitHandle,
                                                           UINT event, LPVOID pData, UINT dataLength)
  {
  	UINT error = CHANNEL_RC_OK;
  	railPlugin* rail = (railPlugin*)lpUserParam;
  
  	if (!rail || (rail->InitHandle != pInitHandle))
  	{
  		WLog_ERR(TAG, "error no match");
  		return;
  	}
  
  	switch (event)
  	{
  		case CHANNEL_EVENT_CONNECTED:
  			if ((error = rail_virtual_channel_event_connected(rail, pData, dataLength)))
  				WLog_ERR(TAG, "rail_virtual_channel_event_connected failed with error %" PRIu32 "!",
  				         error);
  
  			break;
  
  		case CHANNEL_EVENT_DISCONNECTED:
  			if ((error = rail_virtual_channel_event_disconnected(rail)))
  				WLog_ERR(TAG,
  				         "rail_virtual_channel_event_disconnected failed with error %" PRIu32 "!",
  				         error);
  
  			break;
  
  		case CHANNEL_EVENT_TERMINATED:
  			rail_virtual_channel_event_terminated(rail);
  			break;
  
  		case CHANNEL_EVENT_ATTACHED:
  		case CHANNEL_EVENT_DETACHED:
  		default:
  			break;
  	}
  
  	if (error && rail->rdpcontext)
  		setChannelError(rail->rdpcontext, error,
  		                "rail_virtual_channel_init_event_ex reported an error");
  }
  
  /* rail is always built-in */
  #define VirtualChannelEntryEx rail_VirtualChannelEntryEx
  
  BOOL VCAPITYPE VirtualChannelEntryEx(PCHANNEL_ENTRY_POINTS pEntryPoints, PVOID pInitHandle)
  {
  	UINT rc;
  	railPlugin* rail;
  	RailClientContext* context = NULL;
  	CHANNEL_ENTRY_POINTS_FREERDP_EX* pEntryPointsEx;
  	BOOL isFreerdp = FALSE;
  	rail = (railPlugin*)calloc(1, sizeof(railPlugin));
  
  	if (!rail)
  	{
  		WLog_ERR(TAG, "calloc failed!");
  		return FALSE;
  	}
  
  	/* Default to automatically replying to server handshakes */
  	rail->sendHandshake = TRUE;
  	rail->channelDef.options = CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP |
  	                           CHANNEL_OPTION_COMPRESS_RDP | CHANNEL_OPTION_SHOW_PROTOCOL;
  	sprintf_s(rail->channelDef.name, ARRAYSIZE(rail->channelDef.name), RAIL_SVC_CHANNEL_NAME);
  	pEntryPointsEx = (CHANNEL_ENTRY_POINTS_FREERDP_EX*)pEntryPoints;
  
  	if ((pEntryPointsEx->cbSize >= sizeof(CHANNEL_ENTRY_POINTS_FREERDP_EX)) &&
  	    (pEntryPointsEx->MagicNumber == FREERDP_CHANNEL_MAGIC_NUMBER))
  	{
  		context = (RailClientContext*)calloc(1, sizeof(RailClientContext));
  
  		if (!context)
  		{
  			WLog_ERR(TAG, "calloc failed!");
  			free(rail);
  			return FALSE;
  		}
  
  		context->handle = (void*)rail;
  		context->custom = NULL;
  		context->ClientExecute = rail_client_execute;
  		context->ClientActivate = rail_client_activate;
  		context->ClientSystemParam = rail_client_system_param;
  		context->ClientSystemCommand = rail_client_system_command;
  		context->ClientHandshake = rail_client_handshake;
  		context->ClientNotifyEvent = rail_client_notify_event;
  		context->ClientWindowMove = rail_client_window_move;
  		context->ClientInformation = rail_client_information;
  		context->ClientSystemMenu = rail_client_system_menu;
  		context->ClientLanguageBarInfo = rail_client_language_bar_info;
  		context->ClientLanguageIMEInfo = rail_client_language_ime_info;
  		context->ClientGetAppIdRequest = rail_client_get_appid_request;
  		context->ClientSnapArrange = rail_client_snap_arrange;
  		context->ClientCloak = rail_client_cloak;
  		context->ClientCompartmentInfo = rail_client_compartment_info;
  		rail->rdpcontext = pEntryPointsEx->context;
  		rail->context = context;
  		isFreerdp = TRUE;
  	}
  
  	rail->log = WLog_Get("com.freerdp.channels.rail.client");
  	WLog_Print(rail->log, WLOG_DEBUG, "VirtualChannelEntryEx");
  	CopyMemory(&(rail->channelEntryPoints), pEntryPoints, sizeof(CHANNEL_ENTRY_POINTS_FREERDP_EX));
  	rail->InitHandle = pInitHandle;
  	rc = rail->channelEntryPoints.pVirtualChannelInitEx(
  	    rail, context, pInitHandle, &rail->channelDef, 1, VIRTUAL_CHANNEL_VERSION_WIN2000,
  	    rail_virtual_channel_init_event_ex);
  
  	if (CHANNEL_RC_OK != rc)
  	{
  		WLog_ERR(TAG, "failed with %s [%08" PRIX32 "]", WTSErrorToString(rc), rc);
  		goto error_out;
  	}
  
  	rail->channelEntryPoints.pInterface = context;
  	return TRUE;
  error_out:
  
  	if (isFreerdp)
  		free(rail->context);
  
  	free(rail);
  	return FALSE;
  }
  