788 lines
19 KiB
C
788 lines
19 KiB
C
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/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Remote Assistance Virtual Channel
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*
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* Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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* Copyright 2015 Thincast Technologies GmbH
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* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <winpr/crt.h>
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#include <winpr/print.h>
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#include <winpr/stream.h>
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#include "remdesk_main.h"
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT remdesk_virtual_channel_write(RemdeskServerContext* context, wStream* s)
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{
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BOOL status;
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ULONG BytesWritten = 0;
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status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR)Stream_Buffer(s),
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Stream_Length(s), &BytesWritten);
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return (status) ? CHANNEL_RC_OK : ERROR_INTERNAL_ERROR;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT remdesk_read_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
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{
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int status;
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UINT32 ChannelNameLen;
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char* pChannelName = NULL;
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if (Stream_GetRemainingLength(s) < 8)
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{
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WLog_ERR(TAG, "Stream_GetRemainingLength failed!");
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return CHANNEL_RC_NO_MEMORY;
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}
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Stream_Read_UINT32(s, ChannelNameLen); /* ChannelNameLen (4 bytes) */
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Stream_Read_UINT32(s, header->DataLength); /* DataLen (4 bytes) */
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if (ChannelNameLen > 64)
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{
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WLog_ERR(TAG, "ChannelNameLen > 64!");
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return ERROR_INVALID_DATA;
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}
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if ((ChannelNameLen % 2) != 0)
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{
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WLog_ERR(TAG, "(ChannelNameLen %% 2) != 0!");
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return ERROR_INVALID_DATA;
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}
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if (Stream_GetRemainingLength(s) < ChannelNameLen)
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{
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WLog_ERR(TAG, "Stream_GetRemainingLength failed!");
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return ERROR_INVALID_DATA;
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}
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ZeroMemory(header->ChannelName, sizeof(header->ChannelName));
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pChannelName = (char*)header->ChannelName;
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status = ConvertFromUnicode(CP_UTF8, 0, (WCHAR*)Stream_Pointer(s), ChannelNameLen / 2,
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&pChannelName, 32, NULL, NULL);
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Stream_Seek(s, ChannelNameLen);
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if (status <= 0)
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{
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WLog_ERR(TAG, "ConvertFromUnicode failed!");
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return ERROR_INVALID_DATA;
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}
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return CHANNEL_RC_OK;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT remdesk_write_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
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{
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int index;
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UINT32 ChannelNameLen;
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WCHAR ChannelNameW[32];
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ZeroMemory(ChannelNameW, sizeof(ChannelNameW));
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for (index = 0; index < 32; index++)
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{
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ChannelNameW[index] = (WCHAR)header->ChannelName[index];
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}
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ChannelNameLen = (strnlen(header->ChannelName, sizeof(header->ChannelName)) + 1) * 2;
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Stream_Write_UINT32(s, ChannelNameLen); /* ChannelNameLen (4 bytes) */
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Stream_Write_UINT32(s, header->DataLength); /* DataLen (4 bytes) */
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Stream_Write(s, ChannelNameW, ChannelNameLen); /* ChannelName (variable) */
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return CHANNEL_RC_OK;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT remdesk_write_ctl_header(wStream* s, REMDESK_CTL_HEADER* ctlHeader)
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{
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UINT error;
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if ((error = remdesk_write_channel_header(s, (REMDESK_CHANNEL_HEADER*)ctlHeader)))
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{
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WLog_ERR(TAG, "remdesk_write_channel_header failed with error %" PRIu32 "!", error);
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return error;
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}
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Stream_Write_UINT32(s, ctlHeader->msgType); /* msgType (4 bytes) */
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return CHANNEL_RC_OK;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT remdesk_prepare_ctl_header(REMDESK_CTL_HEADER* ctlHeader, UINT32 msgType,
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UINT32 msgSize)
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{
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ctlHeader->msgType = msgType;
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sprintf_s(ctlHeader->ChannelName, ARRAYSIZE(ctlHeader->ChannelName), REMDESK_CHANNEL_CTL_NAME);
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ctlHeader->DataLength = 4 + msgSize;
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return CHANNEL_RC_OK;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT remdesk_send_ctl_result_pdu(RemdeskServerContext* context, UINT32 result)
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{
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wStream* s;
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REMDESK_CTL_RESULT_PDU pdu;
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UINT error;
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pdu.result = result;
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if ((error = remdesk_prepare_ctl_header(&(pdu.ctlHeader), REMDESK_CTL_RESULT, 4)))
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{
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WLog_ERR(TAG, "remdesk_prepare_ctl_header failed with error %" PRIu32 "!", error);
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return error;
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}
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s = Stream_New(NULL, REMDESK_CHANNEL_CTL_SIZE + pdu.ctlHeader.DataLength);
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if (!s)
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{
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WLog_ERR(TAG, "Stream_New failed!");
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return CHANNEL_RC_NO_MEMORY;
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}
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if ((error = remdesk_write_ctl_header(s, &(pdu.ctlHeader))))
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{
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WLog_ERR(TAG, "remdesk_write_ctl_header failed with error %" PRIu32 "!", error);
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goto out;
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}
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Stream_Write_UINT32(s, pdu.result); /* result (4 bytes) */
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Stream_SealLength(s);
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if ((error = remdesk_virtual_channel_write(context, s)))
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WLog_ERR(TAG, "remdesk_virtual_channel_write failed with error %" PRIu32 "!", error);
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out:
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Stream_Free(s, TRUE);
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return error;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT remdesk_send_ctl_version_info_pdu(RemdeskServerContext* context)
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{
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wStream* s;
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REMDESK_CTL_VERSION_INFO_PDU pdu;
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UINT error;
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if ((error = remdesk_prepare_ctl_header(&(pdu.ctlHeader), REMDESK_CTL_VERSIONINFO, 8)))
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{
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WLog_ERR(TAG, "remdesk_prepare_ctl_header failed with error %" PRIu32 "!", error);
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return error;
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}
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pdu.versionMajor = 1;
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pdu.versionMinor = 2;
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s = Stream_New(NULL, REMDESK_CHANNEL_CTL_SIZE + pdu.ctlHeader.DataLength);
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if (!s)
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{
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WLog_ERR(TAG, "Stream_New failed!");
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return CHANNEL_RC_NO_MEMORY;
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}
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if ((error = remdesk_write_ctl_header(s, &(pdu.ctlHeader))))
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{
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WLog_ERR(TAG, "remdesk_write_ctl_header failed with error %" PRIu32 "!", error);
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goto out;
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}
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Stream_Write_UINT32(s, pdu.versionMajor); /* versionMajor (4 bytes) */
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Stream_Write_UINT32(s, pdu.versionMinor); /* versionMinor (4 bytes) */
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Stream_SealLength(s);
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if ((error = remdesk_virtual_channel_write(context, s)))
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WLog_ERR(TAG, "remdesk_virtual_channel_write failed with error %" PRIu32 "!", error);
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out:
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Stream_Free(s, TRUE);
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return error;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT remdesk_recv_ctl_version_info_pdu(RemdeskServerContext* context, wStream* s,
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REMDESK_CHANNEL_HEADER* header)
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{
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UINT32 versionMajor;
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UINT32 versionMinor;
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if (Stream_GetRemainingLength(s) < 8)
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{
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WLog_ERR(TAG, "Stream_GetRemainingLength failed!");
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return ERROR_INVALID_DATA;
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}
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Stream_Read_UINT32(s, versionMajor); /* versionMajor (4 bytes) */
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Stream_Read_UINT32(s, versionMinor); /* versionMinor (4 bytes) */
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return CHANNEL_RC_OK;
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}
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|
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||
|
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/**
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||
|
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* Function description
|
||
|
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*
|
||
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* @return 0 on success, otherwise a Win32 error code
|
||
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*/
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static UINT remdesk_recv_ctl_remote_control_desktop_pdu(RemdeskServerContext* context, wStream* s,
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REMDESK_CHANNEL_HEADER* header)
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{
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||
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int status;
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int cchStringW;
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WCHAR* pStringW;
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UINT32 msgLength;
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int cbRaConnectionStringW = 0;
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WCHAR* raConnectionStringW = NULL;
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REMDESK_CTL_REMOTE_CONTROL_DESKTOP_PDU pdu;
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UINT error;
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msgLength = header->DataLength - 4;
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pStringW = (WCHAR*)Stream_Pointer(s);
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raConnectionStringW = pStringW;
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cchStringW = 0;
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while ((msgLength > 0) && pStringW[cchStringW])
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{
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msgLength -= 2;
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cchStringW++;
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}
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if (pStringW[cchStringW] || !cchStringW)
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return ERROR_INVALID_DATA;
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|
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cchStringW++;
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cbRaConnectionStringW = cchStringW * 2;
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pdu.raConnectionString = NULL;
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||
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status = ConvertFromUnicode(CP_UTF8, 0, raConnectionStringW, cbRaConnectionStringW / 2,
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&pdu.raConnectionString, 0, NULL, NULL);
|
||
|
|
|
||
|
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if (status <= 0)
|
||
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{
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||
|
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WLog_ERR(TAG, "ConvertFromUnicode failed!");
|
||
|
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return ERROR_INTERNAL_ERROR;
|
||
|
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}
|
||
|
|
|
||
|
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WLog_INFO(TAG, "RaConnectionString: %s", pdu.raConnectionString);
|
||
|
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free(pdu.raConnectionString);
|
||
|
|
|
||
|
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if ((error = remdesk_send_ctl_result_pdu(context, 0)))
|
||
|
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WLog_ERR(TAG, "remdesk_send_ctl_result_pdu failed with error %" PRIu32 "!", error);
|
||
|
|
|
||
|
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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 status;
|
||
|
|
int cchStringW;
|
||
|
|
WCHAR* pStringW;
|
||
|
|
UINT32 msgLength;
|
||
|
|
int cbExpertBlobW = 0;
|
||
|
|
WCHAR* expertBlobW = NULL;
|
||
|
|
int cbRaConnectionStringW = 0;
|
||
|
|
WCHAR* raConnectionStringW = NULL;
|
||
|
|
REMDESK_CTL_AUTHENTICATE_PDU pdu;
|
||
|
|
msgLength = header->DataLength - 4;
|
||
|
|
pStringW = (WCHAR*)Stream_Pointer(s);
|
||
|
|
raConnectionStringW = pStringW;
|
||
|
|
cchStringW = 0;
|
||
|
|
|
||
|
|
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 = NULL;
|
||
|
|
status = ConvertFromUnicode(CP_UTF8, 0, raConnectionStringW, cbRaConnectionStringW / 2,
|
||
|
|
&pdu.raConnectionString, 0, NULL, NULL);
|
||
|
|
|
||
|
|
if (status <= 0)
|
||
|
|
{
|
||
|
|
WLog_ERR(TAG, "ConvertFromUnicode failed!");
|
||
|
|
return ERROR_INTERNAL_ERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
pdu.expertBlob = NULL;
|
||
|
|
status = ConvertFromUnicode(CP_UTF8, 0, expertBlobW, cbExpertBlobW / 2, &pdu.expertBlob, 0,
|
||
|
|
NULL, NULL);
|
||
|
|
|
||
|
|
if (status <= 0)
|
||
|
|
{
|
||
|
|
WLog_ERR(TAG, "ConvertFromUnicode failed!");
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
int status;
|
||
|
|
int cbExpertBlobW = 0;
|
||
|
|
WCHAR* expertBlobW = NULL;
|
||
|
|
REMDESK_CTL_VERIFY_PASSWORD_PDU pdu;
|
||
|
|
UINT error;
|
||
|
|
|
||
|
|
if (Stream_GetRemainingLength(s) < 8)
|
||
|
|
{
|
||
|
|
WLog_ERR(TAG, "Stream_GetRemainingLength failed!");
|
||
|
|
return ERROR_INVALID_DATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
pdu.expertBlob = NULL;
|
||
|
|
expertBlobW = (WCHAR*)Stream_Pointer(s);
|
||
|
|
cbExpertBlobW = header->DataLength - 4;
|
||
|
|
status = ConvertFromUnicode(CP_UTF8, 0, expertBlobW, cbExpertBlobW / 2, &pdu.expertBlob, 0,
|
||
|
|
NULL, NULL);
|
||
|
|
|
||
|
|
if (status <= 0)
|
||
|
|
{
|
||
|
|
WLog_ERR(TAG, "ConvertFromUnicode failed!");
|
||
|
|
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_GetRemainingLength(s) < 4)
|
||
|
|
{
|
||
|
|
WLog_ERR(TAG, "Stream_GetRemainingLength failed!");
|
||
|
|
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(Stream_Pointer(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;
|
||
|
|
DWORD status;
|
||
|
|
DWORD nCount;
|
||
|
|
void* buffer;
|
||
|
|
UINT32* pHeader;
|
||
|
|
UINT32 PduLength;
|
||
|
|
HANDLE events[8];
|
||
|
|
HANDLE ChannelEvent;
|
||
|
|
DWORD BytesReturned;
|
||
|
|
RemdeskServerContext* context;
|
||
|
|
UINT error;
|
||
|
|
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");
|
||
|
|
|
||
|
|
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;
|
||
|
|
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;
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
}
|