Adding upstream version 3.3.0+dfsg1.upstream/3.3.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 736 insertions, 0 deletions

diff --git a/channels/remdesk/server/remdesk_main.c b/channels/remdesk/server/remdesk_main.c
new file mode 100644
index 0000000..4c823aa
--- /dev/null
+++ b/channels/remdesk/server/remdesk_main.c
@@ -0,0 +1,736 @@
+/**
+ * FreeRDP: A Remote Desktop Protocol Implementation
+ * Remote Assistance Virtual Channel
+ *
+ * Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>
+ * Copyright 2015 Thincast Technologies GmbH
+ * Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
+ *
+ * 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.
+ */
+
+#include <freerdp/config.h>
+
+#include <winpr/crt.h>
+#include <winpr/print.h>
+#include <winpr/stream.h>
+
+#include <freerdp/freerdp.h>
+
+#include "remdesk_main.h"
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_virtual_channel_write(RemdeskServerContext* context, wStream* s)
+{
+	BOOL status = 0;
+	ULONG BytesWritten = 0;
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR)Stream_Buffer(s),
+	                                Stream_Length(s), &BytesWritten);
+	return (status) ? CHANNEL_RC_OK : ERROR_INTERNAL_ERROR;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_read_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
+{
+	UINT32 ChannelNameLen = 0;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 8))
+		return CHANNEL_RC_NO_MEMORY;
+
+	Stream_Read_UINT32(s, ChannelNameLen);     /* ChannelNameLen (4 bytes) */
+	Stream_Read_UINT32(s, header->DataLength); /* DataLen (4 bytes) */
+
+	if (ChannelNameLen > 64)
+	{
+		WLog_ERR(TAG, "ChannelNameLen > 64!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if ((ChannelNameLen % 2) != 0)
+	{
+		WLog_ERR(TAG, "(ChannelNameLen %% 2) != 0!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (Stream_Read_UTF16_String_As_UTF8_Buffer(s, ChannelNameLen / sizeof(WCHAR),
+	                                            header->ChannelName,
+	                                            ARRAYSIZE(header->ChannelName)) < 0)
+		return ERROR_INVALID_DATA;
+
+	return CHANNEL_RC_OK;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_write_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
+{
+	UINT32 ChannelNameLen = 0;
+	WCHAR ChannelNameW[32] = { 0 };
+
+	for (size_t index = 0; index < 32; index++)
+	{
+		ChannelNameW[index] = (WCHAR)header->ChannelName[index];
+	}
+
+	ChannelNameLen = (strnlen(header->ChannelName, sizeof(header->ChannelName)) + 1) * 2;
+	Stream_Write_UINT32(s, ChannelNameLen);        /* ChannelNameLen (4 bytes) */
+	Stream_Write_UINT32(s, header->DataLength);    /* DataLen (4 bytes) */
+	Stream_Write(s, ChannelNameW, ChannelNameLen); /* ChannelName (variable) */
+	return CHANNEL_RC_OK;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_write_ctl_header(wStream* s, REMDESK_CTL_HEADER* ctlHeader)
+{
+	UINT error = 0;
+
+	if ((error = remdesk_write_channel_header(s, (REMDESK_CHANNEL_HEADER*)ctlHeader)))
+	{
+		WLog_ERR(TAG, "remdesk_write_channel_header failed with error %" PRIu32 "!", error);
+		return error;
+	}
+
+	Stream_Write_UINT32(s, ctlHeader->msgType); /* msgType (4 bytes) */
+	return CHANNEL_RC_OK;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_prepare_ctl_header(REMDESK_CTL_HEADER* ctlHeader, UINT32 msgType,
+                                       UINT32 msgSize)
+{
+	ctlHeader->msgType = msgType;
+	sprintf_s(ctlHeader->ch.ChannelName, ARRAYSIZE(ctlHeader->ch.ChannelName),
+	          REMDESK_CHANNEL_CTL_NAME);
+	ctlHeader->ch.DataLength = 4 + msgSize;
+	return CHANNEL_RC_OK;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_send_ctl_result_pdu(RemdeskServerContext* context, UINT32 result)
+{
+	wStream* s = NULL;
+	REMDESK_CTL_RESULT_PDU pdu;
+	UINT error = 0;
+	pdu.result = result;
+
+	if ((error = remdesk_prepare_ctl_header(&(pdu.ctlHeader), REMDESK_CTL_RESULT, 4)))
+	{
+		WLog_ERR(TAG, "remdesk_prepare_ctl_header failed with error %" PRIu32 "!", error);
+		return error;
+	}
+
+	s = Stream_New(NULL, REMDESK_CHANNEL_CTL_SIZE + pdu.ctlHeader.ch.DataLength);
+
+	if (!s)
+	{
+		WLog_ERR(TAG, "Stream_New failed!");
+		return CHANNEL_RC_NO_MEMORY;
+	}
+
+	if ((error = remdesk_write_ctl_header(s, &(pdu.ctlHeader))))
+	{
+		WLog_ERR(TAG, "remdesk_write_ctl_header failed with error %" PRIu32 "!", error);
+		goto out;
+	}
+
+	Stream_Write_UINT32(s, pdu.result); /* result (4 bytes) */
+	Stream_SealLength(s);
+
+	if ((error = remdesk_virtual_channel_write(context, s)))
+		WLog_ERR(TAG, "remdesk_virtual_channel_write failed with error %" PRIu32 "!", error);
+
+out:
+	Stream_Free(s, TRUE);
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_send_ctl_version_info_pdu(RemdeskServerContext* context)
+{
+	wStream* s = NULL;
+	REMDESK_CTL_VERSION_INFO_PDU pdu;
+	UINT error = 0;
+
+	if ((error = remdesk_prepare_ctl_header(&(pdu.ctlHeader), REMDESK_CTL_VERSIONINFO, 8)))
+	{
+		WLog_ERR(TAG, "remdesk_prepare_ctl_header failed with error %" PRIu32 "!", error);
+		return error;
+	}
+
+	pdu.versionMajor = 1;
+	pdu.versionMinor = 2;
+	s = Stream_New(NULL, REMDESK_CHANNEL_CTL_SIZE + pdu.ctlHeader.ch.DataLength);
+
+	if (!s)
+	{
+		WLog_ERR(TAG, "Stream_New failed!");
+		return CHANNEL_RC_NO_MEMORY;
+	}
+
+	if ((error = remdesk_write_ctl_header(s, &(pdu.ctlHeader))))
+	{
+		WLog_ERR(TAG, "remdesk_write_ctl_header failed with error %" PRIu32 "!", error);
+		goto out;
+	}
+
+	Stream_Write_UINT32(s, pdu.versionMajor); /* versionMajor (4 bytes) */
+	Stream_Write_UINT32(s, pdu.versionMinor); /* versionMinor (4 bytes) */
+	Stream_SealLength(s);
+
+	if ((error = remdesk_virtual_channel_write(context, s)))
+		WLog_ERR(TAG, "remdesk_virtual_channel_write failed with error %" PRIu32 "!", error);
+
+out:
+	Stream_Free(s, TRUE);
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_recv_ctl_version_info_pdu(RemdeskServerContext* context, wStream* s,
+                                              REMDESK_CHANNEL_HEADER* header)
+{
+	UINT32 versionMajor = 0;
+	UINT32 versionMinor = 0;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 8))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT32(s, versionMajor); /* versionMajor (4 bytes) */
+	Stream_Read_UINT32(s, versionMinor); /* versionMinor (4 bytes) */
+	if ((versionMajor != 1) || (versionMinor != 2))
+	{
+		WLog_ERR(TAG, "REMOTEDESKTOP_CTL_VERSIONINFO_PACKET invalid version %" PRIu32 ".%" PRIu32,
+		         versionMajor, versionMinor);
+		return ERROR_INVALID_DATA;
+	}
+
+	return CHANNEL_RC_OK;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_recv_ctl_remote_control_desktop_pdu(RemdeskServerContext* context, wStream* s,
+                                                        REMDESK_CHANNEL_HEADER* header)
+{
+	SSIZE_T cchStringW = 0;
+	SSIZE_T cbRaConnectionStringW = 0;
+	REMDESK_CTL_REMOTE_CONTROL_DESKTOP_PDU pdu = { 0 };
+	UINT error = 0;
+	UINT32 msgLength = header->DataLength - 4;
+	const WCHAR* pStringW = Stream_ConstPointer(s);
+	const WCHAR* raConnectionStringW = pStringW;
+
+	while ((msgLength > 0) && pStringW[cchStringW])
+	{
+		msgLength -= 2;
+		cchStringW++;
+	}
+
+	if (pStringW[cchStringW] || !cchStringW)
+		return ERROR_INVALID_DATA;
+
+	cchStringW++;
+	cbRaConnectionStringW = cchStringW * 2;
+	pdu.raConnectionString =
+	    ConvertWCharNToUtf8Alloc(raConnectionStringW, cbRaConnectionStringW / sizeof(WCHAR), NULL);
+	if (!pdu.raConnectionString)
+		return ERROR_INTERNAL_ERROR;
+
+	WLog_INFO(TAG, "RaConnectionString: %s", pdu.raConnectionString);
+	free(pdu.raConnectionString);
+
+	if ((error = remdesk_send_ctl_result_pdu(context, 0)))
+		WLog_ERR(TAG, "remdesk_send_ctl_result_pdu failed with error %" PRIu32 "!", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_recv_ctl_authenticate_pdu(RemdeskServerContext* context, wStream* s,
+                                              REMDESK_CHANNEL_HEADER* header)
+{
+	int cchStringW = 0;
+	UINT32 msgLength = 0;
+	int cbExpertBlobW = 0;
+	const WCHAR* expertBlobW = NULL;
+	int cbRaConnectionStringW = 0;
+	REMDESK_CTL_AUTHENTICATE_PDU pdu = { 0 };
+	msgLength = header->DataLength - 4;
+	const WCHAR* pStringW = Stream_ConstPointer(s);
+	const WCHAR* raConnectionStringW = pStringW;
+
+	while ((msgLength > 0) && pStringW[cchStringW])
+	{
+		msgLength -= 2;
+		cchStringW++;
+	}
+
+	if (pStringW[cchStringW] || !cchStringW)
+		return ERROR_INVALID_DATA;
+
+	cchStringW++;
+	cbRaConnectionStringW = cchStringW * 2;
+	pStringW += cchStringW;
+	expertBlobW = pStringW;
+	cchStringW = 0;
+
+	while ((msgLength > 0) && pStringW[cchStringW])
+	{
+		msgLength -= 2;
+		cchStringW++;
+	}
+
+	if (pStringW[cchStringW] || !cchStringW)
+		return ERROR_INVALID_DATA;
+
+	cchStringW++;
+	cbExpertBlobW = cchStringW * 2;
+	pdu.raConnectionString =
+	    ConvertWCharNToUtf8Alloc(raConnectionStringW, cbRaConnectionStringW / sizeof(WCHAR), NULL);
+	if (!pdu.raConnectionString)
+		return ERROR_INTERNAL_ERROR;
+
+	pdu.expertBlob = ConvertWCharNToUtf8Alloc(expertBlobW, cbExpertBlobW / sizeof(WCHAR), NULL);
+	if (!pdu.expertBlob)
+	{
+		free(pdu.raConnectionString);
+		return ERROR_INTERNAL_ERROR;
+	}
+
+	WLog_INFO(TAG, "RaConnectionString: %s ExpertBlob: %s", pdu.raConnectionString, pdu.expertBlob);
+	free(pdu.raConnectionString);
+	free(pdu.expertBlob);
+	return CHANNEL_RC_OK;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_recv_ctl_verify_password_pdu(RemdeskServerContext* context, wStream* s,
+                                                 REMDESK_CHANNEL_HEADER* header)
+{
+	SSIZE_T cbExpertBlobW = 0;
+	REMDESK_CTL_VERIFY_PASSWORD_PDU pdu;
+	UINT error = 0;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 8))
+		return ERROR_INVALID_DATA;
+
+	const WCHAR* expertBlobW = Stream_ConstPointer(s);
+	cbExpertBlobW = header->DataLength - 4;
+
+	pdu.expertBlob = ConvertWCharNToUtf8Alloc(expertBlobW, cbExpertBlobW / sizeof(WCHAR), NULL);
+	if (pdu.expertBlob)
+		return ERROR_INTERNAL_ERROR;
+
+	WLog_INFO(TAG, "ExpertBlob: %s", pdu.expertBlob);
+
+	if ((error = remdesk_send_ctl_result_pdu(context, 0)))
+		WLog_ERR(TAG, "remdesk_send_ctl_result_pdu failed with error %" PRIu32 "!", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_recv_ctl_pdu(RemdeskServerContext* context, wStream* s,
+                                 REMDESK_CHANNEL_HEADER* header)
+{
+	UINT error = CHANNEL_RC_OK;
+	UINT32 msgType = 0;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 4))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT32(s, msgType); /* msgType (4 bytes) */
+	WLog_INFO(TAG, "msgType: %" PRIu32 "", msgType);
+
+	switch (msgType)
+	{
+		case REMDESK_CTL_REMOTE_CONTROL_DESKTOP:
+			if ((error = remdesk_recv_ctl_remote_control_desktop_pdu(context, s, header)))
+			{
+				WLog_ERR(TAG,
+				         "remdesk_recv_ctl_remote_control_desktop_pdu failed with error %" PRIu32
+				         "!",
+				         error);
+				return error;
+			}
+
+			break;
+
+		case REMDESK_CTL_AUTHENTICATE:
+			if ((error = remdesk_recv_ctl_authenticate_pdu(context, s, header)))
+			{
+				WLog_ERR(TAG, "remdesk_recv_ctl_authenticate_pdu failed with error %" PRIu32 "!",
+				         error);
+				return error;
+			}
+
+			break;
+
+		case REMDESK_CTL_DISCONNECT:
+			break;
+
+		case REMDESK_CTL_VERSIONINFO:
+			if ((error = remdesk_recv_ctl_version_info_pdu(context, s, header)))
+			{
+				WLog_ERR(TAG, "remdesk_recv_ctl_version_info_pdu failed with error %" PRIu32 "!",
+				         error);
+				return error;
+			}
+
+			break;
+
+		case REMDESK_CTL_ISCONNECTED:
+			break;
+
+		case REMDESK_CTL_VERIFY_PASSWORD:
+			if ((error = remdesk_recv_ctl_verify_password_pdu(context, s, header)))
+			{
+				WLog_ERR(TAG, "remdesk_recv_ctl_verify_password_pdu failed with error %" PRIu32 "!",
+				         error);
+				return error;
+			}
+
+			break;
+
+		case REMDESK_CTL_EXPERT_ON_VISTA:
+			break;
+
+		case REMDESK_CTL_RANOVICE_NAME:
+			break;
+
+		case REMDESK_CTL_RAEXPERT_NAME:
+			break;
+
+		case REMDESK_CTL_TOKEN:
+			break;
+
+		default:
+			WLog_ERR(TAG, "remdesk_recv_control_pdu: unknown msgType: %" PRIu32 "", msgType);
+			error = ERROR_INVALID_DATA;
+			break;
+	}
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_server_receive_pdu(RemdeskServerContext* context, wStream* s)
+{
+	UINT error = CHANNEL_RC_OK;
+	REMDESK_CHANNEL_HEADER header;
+#if 0
+	WLog_INFO(TAG, "RemdeskReceive: %"PRIuz"", Stream_GetRemainingLength(s));
+	winpr_HexDump(WCHAR* expertBlobW = NULL;(s), Stream_GetRemainingLength(s));
+#endif
+
+	if ((error = remdesk_read_channel_header(s, &header)))
+	{
+		WLog_ERR(TAG, "remdesk_read_channel_header failed with error %" PRIu32 "!", error);
+		return error;
+	}
+
+	if (strcmp(header.ChannelName, "RC_CTL") == 0)
+	{
+		if ((error = remdesk_recv_ctl_pdu(context, s, &header)))
+		{
+			WLog_ERR(TAG, "remdesk_recv_ctl_pdu failed with error %" PRIu32 "!", error);
+			return error;
+		}
+	}
+	else if (strcmp(header.ChannelName, "70") == 0)
+	{
+	}
+	else if (strcmp(header.ChannelName, "71") == 0)
+	{
+	}
+	else if (strcmp(header.ChannelName, ".") == 0)
+	{
+	}
+	else if (strcmp(header.ChannelName, "1000.") == 0)
+	{
+	}
+	else if (strcmp(header.ChannelName, "RA_FX") == 0)
+	{
+	}
+	else
+	{
+	}
+
+	return error;
+}
+
+static DWORD WINAPI remdesk_server_thread(LPVOID arg)
+{
+	wStream* s = NULL;
+	DWORD status = 0;
+	DWORD nCount = 0;
+	void* buffer = NULL;
+	UINT32* pHeader = NULL;
+	UINT32 PduLength = 0;
+	HANDLE events[8];
+	HANDLE ChannelEvent = NULL;
+	DWORD BytesReturned = 0;
+	RemdeskServerContext* context = NULL;
+	UINT error = 0;
+	context = (RemdeskServerContext*)arg;
+	buffer = NULL;
+	BytesReturned = 0;
+	ChannelEvent = NULL;
+	s = Stream_New(NULL, 4096);
+
+	if (!s)
+	{
+		WLog_ERR(TAG, "Stream_New failed!");
+		error = CHANNEL_RC_NO_MEMORY;
+		goto out;
+	}
+
+	if (WTSVirtualChannelQuery(context->priv->ChannelHandle, WTSVirtualEventHandle, &buffer,
+	                           &BytesReturned) == TRUE)
+	{
+		if (BytesReturned == sizeof(HANDLE))
+			CopyMemory(&ChannelEvent, buffer, sizeof(HANDLE));
+
+		WTSFreeMemory(buffer);
+	}
+	else
+	{
+		WLog_ERR(TAG, "WTSVirtualChannelQuery failed!");
+		error = ERROR_INTERNAL_ERROR;
+		goto out;
+	}
+
+	nCount = 0;
+	events[nCount++] = ChannelEvent;
+	events[nCount++] = context->priv->StopEvent;
+
+	if ((error = remdesk_send_ctl_version_info_pdu(context)))
+	{
+		WLog_ERR(TAG, "remdesk_send_ctl_version_info_pdu failed with error %" PRIu32 "!", error);
+		goto out;
+	}
+
+	while (1)
+	{
+		status = WaitForMultipleObjects(nCount, events, FALSE, INFINITE);
+
+		if (status == WAIT_FAILED)
+		{
+			error = GetLastError();
+			WLog_ERR(TAG, "WaitForMultipleObjects failed with error %" PRIu32 "", error);
+			break;
+		}
+
+		status = WaitForSingleObject(context->priv->StopEvent, 0);
+
+		if (status == WAIT_FAILED)
+		{
+			error = GetLastError();
+			WLog_ERR(TAG, "WaitForSingleObject failed with error %" PRIu32 "", error);
+			break;
+		}
+
+		if (status == WAIT_OBJECT_0)
+		{
+			break;
+		}
+
+		if (WTSVirtualChannelRead(context->priv->ChannelHandle, 0, (PCHAR)Stream_Buffer(s),
+		                          Stream_Capacity(s), &BytesReturned))
+		{
+			if (BytesReturned)
+				Stream_Seek(s, BytesReturned);
+		}
+		else
+		{
+			if (!Stream_EnsureRemainingCapacity(s, BytesReturned))
+			{
+				WLog_ERR(TAG, "Stream_EnsureRemainingCapacity failed!");
+				error = CHANNEL_RC_NO_MEMORY;
+				break;
+			}
+		}
+
+		if (Stream_GetPosition(s) >= 8)
+		{
+			pHeader = (UINT32*)Stream_Buffer(s);
+			PduLength = pHeader[0] + pHeader[1] + 8;
+
+			if (PduLength >= Stream_GetPosition(s))
+			{
+				Stream_SealLength(s);
+				Stream_SetPosition(s, 0);
+
+				if ((error = remdesk_server_receive_pdu(context, s)))
+				{
+					WLog_ERR(TAG, "remdesk_server_receive_pdu failed with error %" PRIu32 "!",
+					         error);
+					break;
+				}
+
+				Stream_SetPosition(s, 0);
+			}
+		}
+	}
+
+	Stream_Free(s, TRUE);
+out:
+
+	if (error && context->rdpcontext)
+		setChannelError(context->rdpcontext, error, "remdesk_server_thread reported an error");
+
+	ExitThread(error);
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_server_start(RemdeskServerContext* context)
+{
+	context->priv->ChannelHandle =
+	    WTSVirtualChannelOpen(context->vcm, WTS_CURRENT_SESSION, REMDESK_SVC_CHANNEL_NAME);
+
+	if (!context->priv->ChannelHandle)
+	{
+		WLog_ERR(TAG, "WTSVirtualChannelOpen failed!");
+		return ERROR_INTERNAL_ERROR;
+	}
+
+	if (!(context->priv->StopEvent = CreateEvent(NULL, TRUE, FALSE, NULL)))
+	{
+		WLog_ERR(TAG, "CreateEvent failed!");
+		return ERROR_INTERNAL_ERROR;
+	}
+
+	if (!(context->priv->Thread =
+	          CreateThread(NULL, 0, remdesk_server_thread, (void*)context, 0, NULL)))
+	{
+		WLog_ERR(TAG, "CreateThread failed!");
+		CloseHandle(context->priv->StopEvent);
+		context->priv->StopEvent = NULL;
+		return ERROR_INTERNAL_ERROR;
+	}
+
+	return CHANNEL_RC_OK;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT remdesk_server_stop(RemdeskServerContext* context)
+{
+	UINT error = 0;
+	SetEvent(context->priv->StopEvent);
+
+	if (WaitForSingleObject(context->priv->Thread, INFINITE) == WAIT_FAILED)
+	{
+		error = GetLastError();
+		WLog_ERR(TAG, "WaitForSingleObject failed with error %" PRIu32 "!", error);
+		return error;
+	}
+
+	CloseHandle(context->priv->Thread);
+	CloseHandle(context->priv->StopEvent);
+	return CHANNEL_RC_OK;
+}
+
+RemdeskServerContext* remdesk_server_context_new(HANDLE vcm)
+{
+	RemdeskServerContext* context = NULL;
+	context = (RemdeskServerContext*)calloc(1, sizeof(RemdeskServerContext));
+
+	if (context)
+	{
+		context->vcm = vcm;
+		context->Start = remdesk_server_start;
+		context->Stop = remdesk_server_stop;
+		context->priv = (RemdeskServerPrivate*)calloc(1, sizeof(RemdeskServerPrivate));
+
+		if (!context->priv)
+		{
+			free(context);
+			return NULL;
+		}
+
+		context->priv->Version = 1;
+	}
+
+	return context;
+}
+
+void remdesk_server_context_free(RemdeskServerContext* context)
+{
+	if (context)
+	{
+		if (context->priv->ChannelHandle != INVALID_HANDLE_VALUE)
+			WTSVirtualChannelClose(context->priv->ChannelHandle);
+
+		free(context->priv);
+		free(context);
+	}
+}