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, 1304 insertions, 0 deletions

diff --git a/channels/encomsp/client/encomsp_main.c b/channels/encomsp/client/encomsp_main.c
new file mode 100644
index 0000000..18b856e
--- /dev/null
+++ b/channels/encomsp/client/encomsp_main.c
@@ -0,0 +1,1304 @@
+/**
+ * FreeRDP: A Remote Desktop Protocol Implementation
+ * Multiparty 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/assert.h>
+#include <winpr/print.h>
+
+#include <freerdp/freerdp.h>
+#include <freerdp/channels/log.h>
+#include <freerdp/client/encomsp.h>
+
+#include "encomsp_main.h"
+
+struct encomsp_plugin
+{
+	CHANNEL_DEF channelDef;
+	CHANNEL_ENTRY_POINTS_FREERDP_EX channelEntryPoints;
+
+	EncomspClientContext* context;
+
+	HANDLE thread;
+	wStream* data_in;
+	void* InitHandle;
+	DWORD OpenHandle;
+	wMessageQueue* queue;
+	rdpContext* rdpcontext;
+};
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_read_header(wStream* s, ENCOMSP_ORDER_HEADER* header)
+{
+	WINPR_ASSERT(header);
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, ENCOMSP_ORDER_HEADER_SIZE))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT16(s, header->Type);   /* Type (2 bytes) */
+	Stream_Read_UINT16(s, header->Length); /* Length (2 bytes) */
+	return CHANNEL_RC_OK;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_write_header(wStream* s, const ENCOMSP_ORDER_HEADER* header)
+{
+	WINPR_ASSERT(header);
+	Stream_Write_UINT16(s, header->Type);   /* Type (2 bytes) */
+	Stream_Write_UINT16(s, header->Length); /* Length (2 bytes) */
+	return CHANNEL_RC_OK;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_read_unicode_string(wStream* s, ENCOMSP_UNICODE_STRING* str)
+{
+	WINPR_ASSERT(str);
+	const ENCOMSP_UNICODE_STRING empty = { 0 };
+	*str = empty;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 2))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT16(s, str->cchString); /* cchString (2 bytes) */
+
+	if (str->cchString > 1024)
+	{
+		WLog_ERR(TAG, "cchString was %" PRIu16 " but has to be < 1025!", str->cchString);
+		return ERROR_INVALID_DATA;
+	}
+
+	if (!Stream_CheckAndLogRequiredLengthOfSize(TAG, s, str->cchString, sizeof(WCHAR)))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read(s, &(str->wString), (str->cchString * 2)); /* String (variable) */
+	return CHANNEL_RC_OK;
+}
+
+static EncomspClientContext* encomsp_get_client_interface(encomspPlugin* encomsp)
+{
+	WINPR_ASSERT(encomsp);
+	return (EncomspClientContext*)encomsp->channelEntryPoints.pInterface;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_virtual_channel_write(encomspPlugin* encomsp, wStream* s)
+{
+	if (!encomsp)
+	{
+		Stream_Free(s, TRUE);
+		return ERROR_INVALID_HANDLE;
+	}
+
+#if 0
+	WLog_INFO(TAG, "EncomspWrite (%"PRIuz")", Stream_Length(s));
+	winpr_HexDump(Stream_Buffer(s), Stream_Length(s));
+#endif
+	const UINT status = encomsp->channelEntryPoints.pVirtualChannelWriteEx(
+	    encomsp->InitHandle, encomsp->OpenHandle, Stream_Buffer(s), (UINT32)Stream_Length(s), s);
+
+	if (status != CHANNEL_RC_OK)
+	{
+		Stream_Free(s, TRUE);
+		WLog_ERR(TAG, "VirtualChannelWriteEx failed with %s [%08" PRIX32 "]",
+		         WTSErrorToString(status), status);
+	}
+	return status;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_recv_filter_updated_pdu(encomspPlugin* encomsp, wStream* s,
+                                            const ENCOMSP_ORDER_HEADER* header)
+{
+	ENCOMSP_FILTER_UPDATED_PDU pdu = { 0 };
+	UINT error = CHANNEL_RC_OK;
+	EncomspClientContext* context = encomsp_get_client_interface(encomsp);
+
+	if (!context)
+		return ERROR_INVALID_HANDLE;
+
+	WINPR_ASSERT(header);
+	const size_t pos = Stream_GetPosition(s);
+	if (pos < ENCOMSP_ORDER_HEADER_SIZE)
+		return ERROR_INVALID_DATA;
+	const size_t beg = pos - ENCOMSP_ORDER_HEADER_SIZE;
+	pdu.Length = header->Length;
+	pdu.Type = header->Type;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 1))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT8(s, pdu.Flags); /* Flags (1 byte) */
+	const size_t end = Stream_GetPosition(s);
+	const size_t body = beg + header->Length;
+
+	if (body < end)
+	{
+		WLog_ERR(TAG, "Not enough data!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (body > end)
+	{
+		if (!Stream_CheckAndLogRequiredLength(TAG, s, (size_t)(body - end)))
+			return ERROR_INVALID_DATA;
+
+		Stream_SetPosition(s, body);
+	}
+
+	IFCALLRET(context->FilterUpdated, error, context, &pdu);
+
+	if (error)
+		WLog_ERR(TAG, "context->FilterUpdated failed with error %" PRIu32 "", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_recv_application_created_pdu(encomspPlugin* encomsp, wStream* s,
+                                                 const ENCOMSP_ORDER_HEADER* header)
+{
+	ENCOMSP_APPLICATION_CREATED_PDU pdu = { 0 };
+	EncomspClientContext* context = encomsp_get_client_interface(encomsp);
+
+	if (!context)
+		return ERROR_INVALID_HANDLE;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 6))
+		return ERROR_INVALID_DATA;
+
+	const size_t pos = Stream_GetPosition(s);
+	if (pos < ENCOMSP_ORDER_HEADER_SIZE)
+		return ERROR_INVALID_DATA;
+	const size_t beg = pos - ENCOMSP_ORDER_HEADER_SIZE;
+
+	WINPR_ASSERT(header);
+	pdu.Length = header->Length;
+	pdu.Type = header->Type;
+
+	Stream_Read_UINT16(s, pdu.Flags); /* Flags (2 bytes) */
+	Stream_Read_UINT32(s, pdu.AppId); /* AppId (4 bytes) */
+
+	UINT error = encomsp_read_unicode_string(s, &(pdu.Name));
+	if (error != CHANNEL_RC_OK)
+	{
+		WLog_ERR(TAG, "encomsp_read_unicode_string failed with error %" PRIu32 "", error);
+		return error;
+	}
+
+	const size_t end = Stream_GetPosition(s);
+	const size_t body = beg + header->Length;
+
+	if (body < end)
+	{
+		WLog_ERR(TAG, "Not enough data!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (body > end)
+	{
+		if (!Stream_CheckAndLogRequiredLength(TAG, s, (size_t)(body - end)))
+			return ERROR_INVALID_DATA;
+
+		Stream_SetPosition(s, body);
+	}
+
+	IFCALLRET(context->ApplicationCreated, error, context, &pdu);
+
+	if (error)
+		WLog_ERR(TAG, "context->ApplicationCreated failed with error %" PRIu32 "", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_recv_application_removed_pdu(encomspPlugin* encomsp, wStream* s,
+                                                 const ENCOMSP_ORDER_HEADER* header)
+{
+	ENCOMSP_APPLICATION_REMOVED_PDU pdu = { 0 };
+	UINT error = CHANNEL_RC_OK;
+	EncomspClientContext* context = encomsp_get_client_interface(encomsp);
+
+	if (!context)
+		return ERROR_INVALID_HANDLE;
+
+	const size_t pos = Stream_GetPosition(s);
+	if (pos < ENCOMSP_ORDER_HEADER_SIZE)
+		return ERROR_INVALID_DATA;
+	const size_t beg = pos - ENCOMSP_ORDER_HEADER_SIZE;
+
+	WINPR_ASSERT(header);
+	pdu.Length = header->Length;
+	pdu.Type = header->Type;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 4))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT32(s, pdu.AppId); /* AppId (4 bytes) */
+	const size_t end = Stream_GetPosition(s);
+	const size_t body = beg + header->Length;
+
+	if (body < end)
+	{
+		WLog_ERR(TAG, "Not enough data!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (body > end)
+	{
+		if (!Stream_CheckAndLogRequiredLength(TAG, s, (size_t)(body - end)))
+			return ERROR_INVALID_DATA;
+
+		Stream_SetPosition(s, body);
+	}
+
+	IFCALLRET(context->ApplicationRemoved, error, context, &pdu);
+
+	if (error)
+		WLog_ERR(TAG, "context->ApplicationRemoved failed with error %" PRIu32 "", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_recv_window_created_pdu(encomspPlugin* encomsp, wStream* s,
+                                            const ENCOMSP_ORDER_HEADER* header)
+{
+	ENCOMSP_WINDOW_CREATED_PDU pdu = { 0 };
+	UINT error = CHANNEL_RC_OK;
+	EncomspClientContext* context = encomsp_get_client_interface(encomsp);
+
+	if (!context)
+		return ERROR_INVALID_HANDLE;
+
+	const size_t pos = Stream_GetPosition(s);
+	if (pos < ENCOMSP_ORDER_HEADER_SIZE)
+		return ERROR_INVALID_DATA;
+	const size_t beg = pos - ENCOMSP_ORDER_HEADER_SIZE;
+
+	WINPR_ASSERT(header);
+	pdu.Length = header->Length;
+	pdu.Type = header->Type;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 10))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT16(s, pdu.Flags); /* Flags (2 bytes) */
+	Stream_Read_UINT32(s, pdu.AppId); /* AppId (4 bytes) */
+	Stream_Read_UINT32(s, pdu.WndId); /* WndId (4 bytes) */
+
+	if ((error = encomsp_read_unicode_string(s, &(pdu.Name))))
+	{
+		WLog_ERR(TAG, "encomsp_read_unicode_string failed with error %" PRIu32 "", error);
+		return error;
+	}
+
+	const size_t end = Stream_GetPosition(s);
+	const size_t body = beg + header->Length;
+
+	if (body < end)
+	{
+		WLog_ERR(TAG, "Not enough data!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (body > end)
+	{
+		if (!Stream_CheckAndLogRequiredLength(TAG, s, (size_t)(body - end)))
+			return ERROR_INVALID_DATA;
+
+		Stream_SetPosition(s, body);
+	}
+
+	IFCALLRET(context->WindowCreated, error, context, &pdu);
+
+	if (error)
+		WLog_ERR(TAG, "context->WindowCreated failed with error %" PRIu32 "", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_recv_window_removed_pdu(encomspPlugin* encomsp, wStream* s,
+                                            const ENCOMSP_ORDER_HEADER* header)
+{
+	ENCOMSP_WINDOW_REMOVED_PDU pdu = { 0 };
+	UINT error = CHANNEL_RC_OK;
+	EncomspClientContext* context = encomsp_get_client_interface(encomsp);
+
+	if (!context)
+		return ERROR_INVALID_HANDLE;
+
+	const size_t pos = Stream_GetPosition(s);
+	if (pos < ENCOMSP_ORDER_HEADER_SIZE)
+		return ERROR_INVALID_DATA;
+	const size_t beg = pos - ENCOMSP_ORDER_HEADER_SIZE;
+
+	WINPR_ASSERT(header);
+	pdu.Length = header->Length;
+	pdu.Type = header->Type;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 4))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT32(s, pdu.WndId); /* WndId (4 bytes) */
+	const size_t end = Stream_GetPosition(s);
+	const size_t body = beg + header->Length;
+
+	if (body < end)
+	{
+		WLog_ERR(TAG, "Not enough data!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (body > end)
+	{
+		if (!Stream_CheckAndLogRequiredLength(TAG, s, (size_t)(body - end)))
+			return ERROR_INVALID_DATA;
+
+		Stream_SetPosition(s, body);
+	}
+
+	IFCALLRET(context->WindowRemoved, error, context, &pdu);
+
+	if (error)
+		WLog_ERR(TAG, "context->WindowRemoved failed with error %" PRIu32 "", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_recv_show_window_pdu(encomspPlugin* encomsp, wStream* s,
+                                         const ENCOMSP_ORDER_HEADER* header)
+{
+	ENCOMSP_SHOW_WINDOW_PDU pdu = { 0 };
+	UINT error = CHANNEL_RC_OK;
+	EncomspClientContext* context = encomsp_get_client_interface(encomsp);
+
+	if (!context)
+		return ERROR_INVALID_HANDLE;
+
+	const size_t pos = Stream_GetPosition(s);
+	if (pos < ENCOMSP_ORDER_HEADER_SIZE)
+		return ERROR_INVALID_DATA;
+	const size_t beg = pos - ENCOMSP_ORDER_HEADER_SIZE;
+
+	WINPR_ASSERT(header);
+	pdu.Length = header->Length;
+	pdu.Type = header->Type;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 4))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT32(s, pdu.WndId); /* WndId (4 bytes) */
+	const size_t end = Stream_GetPosition(s);
+	const size_t body = beg + header->Length;
+
+	if (body < end)
+	{
+		WLog_ERR(TAG, "Not enough data!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (body > end)
+	{
+		if (!Stream_CheckAndLogRequiredLength(TAG, s, (size_t)(body - end)))
+			return ERROR_INVALID_DATA;
+
+		Stream_SetPosition(s, body);
+	}
+
+	IFCALLRET(context->ShowWindow, error, context, &pdu);
+
+	if (error)
+		WLog_ERR(TAG, "context->ShowWindow failed with error %" PRIu32 "", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_recv_participant_created_pdu(encomspPlugin* encomsp, wStream* s,
+                                                 const ENCOMSP_ORDER_HEADER* header)
+{
+	ENCOMSP_PARTICIPANT_CREATED_PDU pdu = { 0 };
+	EncomspClientContext* context = encomsp_get_client_interface(encomsp);
+
+	if (!context)
+		return ERROR_INVALID_HANDLE;
+
+	const size_t pos = Stream_GetPosition(s);
+	if (pos < ENCOMSP_ORDER_HEADER_SIZE)
+		return ERROR_INVALID_DATA;
+	const size_t beg = pos - ENCOMSP_ORDER_HEADER_SIZE;
+
+	WINPR_ASSERT(header);
+	pdu.Length = header->Length;
+	pdu.Type = header->Type;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 10))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT32(s, pdu.ParticipantId); /* ParticipantId (4 bytes) */
+	Stream_Read_UINT32(s, pdu.GroupId);       /* GroupId (4 bytes) */
+	Stream_Read_UINT16(s, pdu.Flags);         /* Flags (2 bytes) */
+
+	UINT error = encomsp_read_unicode_string(s, &(pdu.FriendlyName));
+	if (error != CHANNEL_RC_OK)
+	{
+		WLog_ERR(TAG, "encomsp_read_unicode_string failed with error %" PRIu32 "", error);
+		return error;
+	}
+
+	const size_t end = Stream_GetPosition(s);
+	const size_t body = beg + header->Length;
+
+	if (body < end)
+	{
+		WLog_ERR(TAG, "Not enough data!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (body > end)
+	{
+		if (!Stream_CheckAndLogRequiredLength(TAG, s, (size_t)(body - end)))
+			return ERROR_INVALID_DATA;
+
+		Stream_SetPosition(s, body);
+	}
+
+	IFCALLRET(context->ParticipantCreated, error, context, &pdu);
+
+	if (error)
+		WLog_ERR(TAG, "context->ParticipantCreated failed with error %" PRIu32 "", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_recv_participant_removed_pdu(encomspPlugin* encomsp, wStream* s,
+                                                 const ENCOMSP_ORDER_HEADER* header)
+{
+	ENCOMSP_PARTICIPANT_REMOVED_PDU pdu = { 0 };
+	UINT error = CHANNEL_RC_OK;
+	EncomspClientContext* context = encomsp_get_client_interface(encomsp);
+
+	if (!context)
+		return ERROR_INVALID_HANDLE;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 12))
+		return ERROR_INVALID_DATA;
+
+	const size_t beg = (Stream_GetPosition(s)) - ENCOMSP_ORDER_HEADER_SIZE;
+
+	WINPR_ASSERT(header);
+	pdu.Length = header->Length;
+	pdu.Type = header->Type;
+
+	Stream_Read_UINT32(s, pdu.ParticipantId); /* ParticipantId (4 bytes) */
+	Stream_Read_UINT32(s, pdu.DiscType);      /* DiscType (4 bytes) */
+	Stream_Read_UINT32(s, pdu.DiscCode);      /* DiscCode (4 bytes) */
+	const size_t end = Stream_GetPosition(s);
+	const size_t body = beg + header->Length;
+
+	if (body < end)
+	{
+		WLog_ERR(TAG, "Not enough data!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (body > end)
+	{
+		if (!Stream_CheckAndLogRequiredLength(TAG, s, (size_t)(body - end)))
+			return ERROR_INVALID_DATA;
+
+		Stream_SetPosition(s, body);
+	}
+
+	IFCALLRET(context->ParticipantRemoved, error, context, &pdu);
+
+	if (error)
+		WLog_ERR(TAG, "context->ParticipantRemoved failed with error %" PRIu32 "", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_recv_change_participant_control_level_pdu(encomspPlugin* encomsp, wStream* s,
+                                                              const ENCOMSP_ORDER_HEADER* header)
+{
+	ENCOMSP_CHANGE_PARTICIPANT_CONTROL_LEVEL_PDU pdu = { 0 };
+	UINT error = CHANNEL_RC_OK;
+	EncomspClientContext* context = encomsp_get_client_interface(encomsp);
+
+	if (!context)
+		return ERROR_INVALID_HANDLE;
+
+	const size_t pos = Stream_GetPosition(s);
+	if (pos < ENCOMSP_ORDER_HEADER_SIZE)
+		return ERROR_INVALID_DATA;
+	const size_t beg = pos - ENCOMSP_ORDER_HEADER_SIZE;
+
+	WINPR_ASSERT(header);
+	pdu.Length = header->Length;
+	pdu.Type = header->Type;
+
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 6))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT16(s, pdu.Flags);         /* Flags (2 bytes) */
+	Stream_Read_UINT32(s, pdu.ParticipantId); /* ParticipantId (4 bytes) */
+	const size_t end = Stream_GetPosition(s);
+	const size_t body = beg + header->Length;
+
+	if (body < end)
+	{
+		WLog_ERR(TAG, "Not enough data!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (body > end)
+	{
+		if (!Stream_CheckAndLogRequiredLength(TAG, s, (size_t)(body - end)))
+			return ERROR_INVALID_DATA;
+
+		Stream_SetPosition(s, body);
+	}
+
+	IFCALLRET(context->ChangeParticipantControlLevel, error, context, &pdu);
+
+	if (error)
+		WLog_ERR(TAG, "context->ChangeParticipantControlLevel failed with error %" PRIu32 "",
+		         error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_send_change_participant_control_level_pdu(
+    EncomspClientContext* context, const ENCOMSP_CHANGE_PARTICIPANT_CONTROL_LEVEL_PDU* pdu)
+{
+	ENCOMSP_ORDER_HEADER header = { 0 };
+
+	WINPR_ASSERT(context);
+	encomspPlugin* encomsp = (encomspPlugin*)context->handle;
+
+	header.Type = ODTYPE_PARTICIPANT_CTRL_CHANGED;
+	header.Length = ENCOMSP_ORDER_HEADER_SIZE + 6;
+
+	wStream* s = Stream_New(NULL, header.Length);
+
+	if (!s)
+	{
+		WLog_ERR(TAG, "Stream_New failed!");
+		return CHANNEL_RC_NO_MEMORY;
+	}
+
+	const UINT error = encomsp_write_header(s, &header);
+	if (error != CHANNEL_RC_OK)
+	{
+		WLog_ERR(TAG, "encomsp_write_header failed with error %" PRIu32 "!", error);
+		return error;
+	}
+
+	Stream_Write_UINT16(s, pdu->Flags);         /* Flags (2 bytes) */
+	Stream_Write_UINT32(s, pdu->ParticipantId); /* ParticipantId (4 bytes) */
+	Stream_SealLength(s);
+	return encomsp_virtual_channel_write(encomsp, s);
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_recv_graphics_stream_paused_pdu(encomspPlugin* encomsp, wStream* s,
+                                                    const ENCOMSP_ORDER_HEADER* header)
+{
+	ENCOMSP_GRAPHICS_STREAM_PAUSED_PDU pdu = { 0 };
+	UINT error = CHANNEL_RC_OK;
+	EncomspClientContext* context = encomsp_get_client_interface(encomsp);
+
+	if (!context)
+		return ERROR_INVALID_HANDLE;
+
+	const size_t pos = Stream_GetPosition(s);
+	if (pos < ENCOMSP_ORDER_HEADER_SIZE)
+		return ERROR_INVALID_DATA;
+	const size_t beg = pos - ENCOMSP_ORDER_HEADER_SIZE;
+
+	WINPR_ASSERT(header);
+	pdu.Length = header->Length;
+	pdu.Type = header->Type;
+
+	const size_t end = Stream_GetPosition(s);
+	const size_t body = beg + header->Length;
+
+	if (body < end)
+	{
+		WLog_ERR(TAG, "Not enough data!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (body > end)
+	{
+		if (!Stream_CheckAndLogRequiredLength(TAG, s, (size_t)(body - end)))
+			return ERROR_INVALID_DATA;
+
+		Stream_SetPosition(s, body);
+	}
+
+	IFCALLRET(context->GraphicsStreamPaused, error, context, &pdu);
+
+	if (error)
+		WLog_ERR(TAG, "context->GraphicsStreamPaused failed with error %" PRIu32 "", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_recv_graphics_stream_resumed_pdu(encomspPlugin* encomsp, wStream* s,
+                                                     const ENCOMSP_ORDER_HEADER* header)
+{
+	ENCOMSP_GRAPHICS_STREAM_RESUMED_PDU pdu = { 0 };
+	UINT error = CHANNEL_RC_OK;
+	EncomspClientContext* context = encomsp_get_client_interface(encomsp);
+
+	if (!context)
+		return ERROR_INVALID_HANDLE;
+
+	const size_t pos = Stream_GetPosition(s);
+	if (pos < ENCOMSP_ORDER_HEADER_SIZE)
+		return ERROR_INVALID_DATA;
+	const size_t beg = pos - ENCOMSP_ORDER_HEADER_SIZE;
+
+	WINPR_ASSERT(header);
+	pdu.Length = header->Length;
+	pdu.Type = header->Type;
+
+	const size_t end = Stream_GetPosition(s);
+	const size_t body = beg + header->Length;
+
+	if (body < end)
+	{
+		WLog_ERR(TAG, "Not enough data!");
+		return ERROR_INVALID_DATA;
+	}
+
+	if (body > end)
+	{
+		if (!Stream_CheckAndLogRequiredLength(TAG, s, (size_t)(body - end)))
+			return ERROR_INVALID_DATA;
+
+		Stream_SetPosition(s, body);
+	}
+
+	IFCALLRET(context->GraphicsStreamResumed, error, context, &pdu);
+
+	if (error)
+		WLog_ERR(TAG, "context->GraphicsStreamResumed failed with error %" PRIu32 "", error);
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_process_receive(encomspPlugin* encomsp, wStream* s)
+{
+	UINT error = CHANNEL_RC_OK;
+	ENCOMSP_ORDER_HEADER header = { 0 };
+
+	WINPR_ASSERT(encomsp);
+	while (Stream_GetRemainingLength(s) > 0)
+	{
+		if ((error = encomsp_read_header(s, &header)))
+		{
+			WLog_ERR(TAG, "encomsp_read_header failed with error %" PRIu32 "!", error);
+			return error;
+		}
+
+		// WLog_DBG(TAG, "EncomspReceive: Type: %"PRIu16" Length: %"PRIu16"", header.Type,
+		// header.Length);
+
+		switch (header.Type)
+		{
+			case ODTYPE_FILTER_STATE_UPDATED:
+				if ((error = encomsp_recv_filter_updated_pdu(encomsp, s, &header)))
+				{
+					WLog_ERR(TAG, "encomsp_recv_filter_updated_pdu failed with error %" PRIu32 "!",
+					         error);
+					return error;
+				}
+
+				break;
+
+			case ODTYPE_APP_REMOVED:
+				if ((error = encomsp_recv_application_removed_pdu(encomsp, s, &header)))
+				{
+					WLog_ERR(TAG,
+					         "encomsp_recv_application_removed_pdu failed with error %" PRIu32 "!",
+					         error);
+					return error;
+				}
+
+				break;
+
+			case ODTYPE_APP_CREATED:
+				if ((error = encomsp_recv_application_created_pdu(encomsp, s, &header)))
+				{
+					WLog_ERR(TAG,
+					         "encomsp_recv_application_removed_pdu failed with error %" PRIu32 "!",
+					         error);
+					return error;
+				}
+
+				break;
+
+			case ODTYPE_WND_REMOVED:
+				if ((error = encomsp_recv_window_removed_pdu(encomsp, s, &header)))
+				{
+					WLog_ERR(TAG, "encomsp_recv_window_removed_pdu failed with error %" PRIu32 "!",
+					         error);
+					return error;
+				}
+
+				break;
+
+			case ODTYPE_WND_CREATED:
+				if ((error = encomsp_recv_window_created_pdu(encomsp, s, &header)))
+				{
+					WLog_ERR(TAG, "encomsp_recv_window_created_pdu failed with error %" PRIu32 "!",
+					         error);
+					return error;
+				}
+
+				break;
+
+			case ODTYPE_WND_SHOW:
+				if ((error = encomsp_recv_show_window_pdu(encomsp, s, &header)))
+				{
+					WLog_ERR(TAG, "encomsp_recv_show_window_pdu failed with error %" PRIu32 "!",
+					         error);
+					return error;
+				}
+
+				break;
+
+			case ODTYPE_PARTICIPANT_REMOVED:
+				if ((error = encomsp_recv_participant_removed_pdu(encomsp, s, &header)))
+				{
+					WLog_ERR(TAG,
+					         "encomsp_recv_participant_removed_pdu failed with error %" PRIu32 "!",
+					         error);
+					return error;
+				}
+
+				break;
+
+			case ODTYPE_PARTICIPANT_CREATED:
+				if ((error = encomsp_recv_participant_created_pdu(encomsp, s, &header)))
+				{
+					WLog_ERR(TAG,
+					         "encomsp_recv_participant_created_pdu failed with error %" PRIu32 "!",
+					         error);
+					return error;
+				}
+
+				break;
+
+			case ODTYPE_PARTICIPANT_CTRL_CHANGED:
+				if ((error =
+				         encomsp_recv_change_participant_control_level_pdu(encomsp, s, &header)))
+				{
+					WLog_ERR(TAG,
+					         "encomsp_recv_change_participant_control_level_pdu failed with error "
+					         "%" PRIu32 "!",
+					         error);
+					return error;
+				}
+
+				break;
+
+			case ODTYPE_GRAPHICS_STREAM_PAUSED:
+				if ((error = encomsp_recv_graphics_stream_paused_pdu(encomsp, s, &header)))
+				{
+					WLog_ERR(TAG,
+					         "encomsp_recv_graphics_stream_paused_pdu failed with error %" PRIu32
+					         "!",
+					         error);
+					return error;
+				}
+
+				break;
+
+			case ODTYPE_GRAPHICS_STREAM_RESUMED:
+				if ((error = encomsp_recv_graphics_stream_resumed_pdu(encomsp, s, &header)))
+				{
+					WLog_ERR(TAG,
+					         "encomsp_recv_graphics_stream_resumed_pdu failed with error %" PRIu32
+					         "!",
+					         error);
+					return error;
+				}
+
+				break;
+
+			default:
+				WLog_ERR(TAG, "header.Type %" PRIu16 " not found", header.Type);
+				return ERROR_INVALID_DATA;
+		}
+	}
+
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_virtual_channel_event_data_received(encomspPlugin* encomsp, const void* pData,
+                                                        UINT32 dataLength, UINT32 totalLength,
+                                                        UINT32 dataFlags)
+{
+	WINPR_ASSERT(encomsp);
+
+	if ((dataFlags & CHANNEL_FLAG_SUSPEND) || (dataFlags & CHANNEL_FLAG_RESUME))
+		return CHANNEL_RC_OK;
+
+	if (dataFlags & CHANNEL_FLAG_FIRST)
+	{
+		if (encomsp->data_in)
+			Stream_Free(encomsp->data_in, TRUE);
+
+		encomsp->data_in = Stream_New(NULL, totalLength);
+
+		if (!encomsp->data_in)
+		{
+			WLog_ERR(TAG, "Stream_New failed!");
+			return CHANNEL_RC_NO_MEMORY;
+		}
+	}
+
+	wStream* data_in = encomsp->data_in;
+
+	if (!Stream_EnsureRemainingCapacity(data_in, dataLength))
+	{
+		WLog_ERR(TAG, "Stream_EnsureRemainingCapacity failed!");
+		return ERROR_INTERNAL_ERROR;
+	}
+
+	Stream_Write(data_in, pData, dataLength);
+
+	if (dataFlags & CHANNEL_FLAG_LAST)
+	{
+		if (Stream_Capacity(data_in) != Stream_GetPosition(data_in))
+		{
+			WLog_ERR(TAG, "encomsp_plugin_process_received: read error");
+			return ERROR_INVALID_DATA;
+		}
+
+		encomsp->data_in = NULL;
+		Stream_SealLength(data_in);
+		Stream_SetPosition(data_in, 0);
+
+		if (!MessageQueue_Post(encomsp->queue, NULL, 0, (void*)data_in, NULL))
+		{
+			WLog_ERR(TAG, "MessageQueue_Post failed!");
+			return ERROR_INTERNAL_ERROR;
+		}
+	}
+
+	return CHANNEL_RC_OK;
+}
+
+static VOID VCAPITYPE encomsp_virtual_channel_open_event_ex(LPVOID lpUserParam, DWORD openHandle,
+                                                            UINT event, LPVOID pData,
+                                                            UINT32 dataLength, UINT32 totalLength,
+                                                            UINT32 dataFlags)
+{
+	UINT error = CHANNEL_RC_OK;
+	encomspPlugin* encomsp = (encomspPlugin*)lpUserParam;
+
+	switch (event)
+	{
+		case CHANNEL_EVENT_DATA_RECEIVED:
+			if (!encomsp || (encomsp->OpenHandle != openHandle))
+			{
+				WLog_ERR(TAG, "error no match");
+				return;
+			}
+			if ((error = encomsp_virtual_channel_event_data_received(encomsp, pData, dataLength,
+			                                                         totalLength, dataFlags)))
+				WLog_ERR(TAG,
+				         "encomsp_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 && encomsp && encomsp->rdpcontext)
+		setChannelError(encomsp->rdpcontext, error,
+		                "encomsp_virtual_channel_open_event reported an error");
+
+	return;
+}
+
+static DWORD WINAPI encomsp_virtual_channel_client_thread(LPVOID arg)
+{
+	wStream* data = NULL;
+	wMessage message = { 0 };
+	encomspPlugin* encomsp = (encomspPlugin*)arg;
+	UINT error = CHANNEL_RC_OK;
+
+	WINPR_ASSERT(encomsp);
+	while (1)
+	{
+		if (!MessageQueue_Wait(encomsp->queue))
+		{
+			WLog_ERR(TAG, "MessageQueue_Wait failed!");
+			error = ERROR_INTERNAL_ERROR;
+			break;
+		}
+
+		if (!MessageQueue_Peek(encomsp->queue, &message, TRUE))
+		{
+			WLog_ERR(TAG, "MessageQueue_Peek failed!");
+			error = ERROR_INTERNAL_ERROR;
+			break;
+		}
+
+		if (message.id == WMQ_QUIT)
+			break;
+
+		if (message.id == 0)
+		{
+			data = (wStream*)message.wParam;
+
+			if ((error = encomsp_process_receive(encomsp, data)))
+			{
+				WLog_ERR(TAG, "encomsp_process_receive failed with error %" PRIu32 "!", error);
+				Stream_Free(data, TRUE);
+				break;
+			}
+
+			Stream_Free(data, TRUE);
+		}
+	}
+
+	if (error && encomsp->rdpcontext)
+		setChannelError(encomsp->rdpcontext, error,
+		                "encomsp_virtual_channel_client_thread reported an error");
+
+	ExitThread(error);
+	return error;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_virtual_channel_event_connected(encomspPlugin* encomsp, LPVOID pData,
+                                                    UINT32 dataLength)
+{
+	WINPR_ASSERT(encomsp);
+
+	encomsp->queue = MessageQueue_New(NULL);
+
+	if (!encomsp->queue)
+	{
+		WLog_ERR(TAG, "MessageQueue_New failed!");
+		return CHANNEL_RC_NO_MEMORY;
+	}
+
+	if (!(encomsp->thread = CreateThread(NULL, 0, encomsp_virtual_channel_client_thread,
+	                                     (void*)encomsp, 0, NULL)))
+	{
+		WLog_ERR(TAG, "CreateThread failed!");
+		MessageQueue_Free(encomsp->queue);
+		return ERROR_INTERNAL_ERROR;
+	}
+
+	return encomsp->channelEntryPoints.pVirtualChannelOpenEx(
+	    encomsp->InitHandle, &encomsp->OpenHandle, encomsp->channelDef.name,
+	    encomsp_virtual_channel_open_event_ex);
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_virtual_channel_event_disconnected(encomspPlugin* encomsp)
+{
+	WINPR_ASSERT(encomsp);
+	if (encomsp->OpenHandle == 0)
+		return CHANNEL_RC_OK;
+
+	if (encomsp->queue && encomsp->thread)
+	{
+		if (MessageQueue_PostQuit(encomsp->queue, 0) &&
+		    (WaitForSingleObject(encomsp->thread, INFINITE) == WAIT_FAILED))
+		{
+			const UINT rc = GetLastError();
+			WLog_ERR(TAG, "WaitForSingleObject failed with error %" PRIu32 "", rc);
+			return rc;
+		}
+	}
+
+	MessageQueue_Free(encomsp->queue);
+	CloseHandle(encomsp->thread);
+	encomsp->queue = NULL;
+	encomsp->thread = NULL;
+
+	WINPR_ASSERT(encomsp->channelEntryPoints.pVirtualChannelCloseEx);
+	const UINT rc = encomsp->channelEntryPoints.pVirtualChannelCloseEx(encomsp->InitHandle,
+	                                                                   encomsp->OpenHandle);
+
+	if (CHANNEL_RC_OK != rc)
+	{
+		WLog_ERR(TAG, "pVirtualChannelClose failed with %s [%08" PRIX32 "]", WTSErrorToString(rc),
+		         rc);
+		return rc;
+	}
+
+	encomsp->OpenHandle = 0;
+
+	if (encomsp->data_in)
+	{
+		Stream_Free(encomsp->data_in, TRUE);
+		encomsp->data_in = NULL;
+	}
+
+	return CHANNEL_RC_OK;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+static UINT encomsp_virtual_channel_event_terminated(encomspPlugin* encomsp)
+{
+	WINPR_ASSERT(encomsp);
+
+	encomsp->InitHandle = 0;
+	free(encomsp->context);
+	free(encomsp);
+	return CHANNEL_RC_OK;
+}
+
+static VOID VCAPITYPE encomsp_virtual_channel_init_event_ex(LPVOID lpUserParam, LPVOID pInitHandle,
+                                                            UINT event, LPVOID pData,
+                                                            UINT dataLength)
+{
+	UINT error = CHANNEL_RC_OK;
+	encomspPlugin* encomsp = (encomspPlugin*)lpUserParam;
+
+	if (!encomsp || (encomsp->InitHandle != pInitHandle))
+	{
+		WLog_ERR(TAG, "error no match");
+		return;
+	}
+
+	switch (event)
+	{
+		case CHANNEL_EVENT_INITIALIZED:
+			break;
+
+		case CHANNEL_EVENT_CONNECTED:
+			if ((error = encomsp_virtual_channel_event_connected(encomsp, pData, dataLength)))
+				WLog_ERR(TAG,
+				         "encomsp_virtual_channel_event_connected failed with error %" PRIu32 "",
+				         error);
+
+			break;
+
+		case CHANNEL_EVENT_DISCONNECTED:
+			if ((error = encomsp_virtual_channel_event_disconnected(encomsp)))
+				WLog_ERR(TAG,
+				         "encomsp_virtual_channel_event_disconnected failed with error %" PRIu32 "",
+				         error);
+
+			break;
+
+		case CHANNEL_EVENT_TERMINATED:
+			encomsp_virtual_channel_event_terminated(encomsp);
+			break;
+
+		default:
+			break;
+	}
+
+	if (error && encomsp->rdpcontext)
+		setChannelError(encomsp->rdpcontext, error,
+		                "encomsp_virtual_channel_init_event reported an error");
+}
+
+/* encomsp is always built-in */
+#define VirtualChannelEntryEx encomsp_VirtualChannelEntryEx
+
+FREERDP_ENTRY_POINT(BOOL VCAPITYPE VirtualChannelEntryEx(PCHANNEL_ENTRY_POINTS_EX pEntryPoints,
+                                                         PVOID pInitHandle))
+{
+	BOOL isFreerdp = FALSE;
+	encomspPlugin* encomsp = (encomspPlugin*)calloc(1, sizeof(encomspPlugin));
+
+	if (!encomsp)
+	{
+		WLog_ERR(TAG, "calloc failed!");
+		return FALSE;
+	}
+
+	encomsp->channelDef.options = CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP |
+	                              CHANNEL_OPTION_COMPRESS_RDP | CHANNEL_OPTION_SHOW_PROTOCOL;
+	sprintf_s(encomsp->channelDef.name, ARRAYSIZE(encomsp->channelDef.name),
+	          ENCOMSP_SVC_CHANNEL_NAME);
+	CHANNEL_ENTRY_POINTS_FREERDP_EX* pEntryPointsEx =
+	    (CHANNEL_ENTRY_POINTS_FREERDP_EX*)pEntryPoints;
+	WINPR_ASSERT(pEntryPointsEx);
+
+	EncomspClientContext* context = NULL;
+	if ((pEntryPointsEx->cbSize >= sizeof(CHANNEL_ENTRY_POINTS_FREERDP_EX)) &&
+	    (pEntryPointsEx->MagicNumber == FREERDP_CHANNEL_MAGIC_NUMBER))
+	{
+		context = (EncomspClientContext*)calloc(1, sizeof(EncomspClientContext));
+
+		if (!context)
+		{
+			WLog_ERR(TAG, "calloc failed!");
+			goto error_out;
+		}
+
+		context->handle = (void*)encomsp;
+		context->FilterUpdated = NULL;
+		context->ApplicationCreated = NULL;
+		context->ApplicationRemoved = NULL;
+		context->WindowCreated = NULL;
+		context->WindowRemoved = NULL;
+		context->ShowWindow = NULL;
+		context->ParticipantCreated = NULL;
+		context->ParticipantRemoved = NULL;
+		context->ChangeParticipantControlLevel = encomsp_send_change_participant_control_level_pdu;
+		context->GraphicsStreamPaused = NULL;
+		context->GraphicsStreamResumed = NULL;
+		encomsp->context = context;
+		encomsp->rdpcontext = pEntryPointsEx->context;
+		isFreerdp = TRUE;
+	}
+
+	CopyMemory(&(encomsp->channelEntryPoints), pEntryPoints,
+	           sizeof(CHANNEL_ENTRY_POINTS_FREERDP_EX));
+	encomsp->InitHandle = pInitHandle;
+	const UINT rc = encomsp->channelEntryPoints.pVirtualChannelInitEx(
+	    encomsp, context, pInitHandle, &encomsp->channelDef, 1, VIRTUAL_CHANNEL_VERSION_WIN2000,
+	    encomsp_virtual_channel_init_event_ex);
+
+	if (CHANNEL_RC_OK != rc)
+	{
+		WLog_ERR(TAG, "failed with %s [%08" PRIX32 "]", WTSErrorToString(rc), rc);
+		goto error_out;
+	}
+
+	encomsp->channelEntryPoints.pInterface = context;
+	return TRUE;
+error_out:
+
+	if (isFreerdp)
+		free(encomsp->context);
+
+	free(encomsp);
+	return FALSE;
+}