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Diffstat (limited to '')
| -rw-r--r-- | channels/encomsp/client/encomsp_main.c | 1304 |
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; +} |