diff options
Diffstat (limited to 'channels/remdesk/client/remdesk_main.c')
| -rw-r--r-- | channels/remdesk/client/remdesk_main.c | 1108 |
1 files changed, 1108 insertions, 0 deletions
diff --git a/channels/remdesk/client/remdesk_main.c b/channels/remdesk/client/remdesk_main.c new file mode 100644 index 0000000..1d39ed1 --- /dev/null +++ b/channels/remdesk/client/remdesk_main.c @@ -0,0 +1,1108 @@ +/** + * FreeRDP: A Remote Desktop Protocol Implementation + * Remote Assistance Virtual Channel + * + * Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com> + * Copyright 2015 Thincast Technologies GmbH + * Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com> + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <freerdp/config.h> + +#include <winpr/crt.h> +#include <winpr/assert.h> +#include <winpr/print.h> + +#include <freerdp/freerdp.h> +#include <freerdp/assistance.h> + +#include <freerdp/channels/log.h> +#include <freerdp/client/remdesk.h> + +#include "remdesk_main.h" + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_virtual_channel_write(remdeskPlugin* remdesk, wStream* s) +{ + UINT32 status = 0; + + if (!remdesk) + { + WLog_ERR(TAG, "remdesk was null!"); + Stream_Free(s, TRUE); + return CHANNEL_RC_INVALID_INSTANCE; + } + + WINPR_ASSERT(remdesk->channelEntryPoints.pVirtualChannelWriteEx); + status = remdesk->channelEntryPoints.pVirtualChannelWriteEx( + remdesk->InitHandle, remdesk->OpenHandle, Stream_Buffer(s), (UINT32)Stream_Length(s), s); + + if (status != CHANNEL_RC_OK) + { + Stream_Free(s, TRUE); + WLog_ERR(TAG, "pVirtualChannelWriteEx failed with %s [%08" PRIX32 "]", + WTSErrorToString(status), status); + } + return status; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_generate_expert_blob(remdeskPlugin* remdesk) +{ + char* name = NULL; + char* pass = NULL; + const char* password = NULL; + rdpSettings* settings = NULL; + + WINPR_ASSERT(remdesk); + + WINPR_ASSERT(remdesk->rdpcontext); + settings = remdesk->rdpcontext->settings; + WINPR_ASSERT(settings); + + if (remdesk->ExpertBlob) + return CHANNEL_RC_OK; + + password = freerdp_settings_get_string(settings, FreeRDP_RemoteAssistancePassword); + if (!password) + password = freerdp_settings_get_string(settings, FreeRDP_Password); + + if (!password) + { + WLog_ERR(TAG, "password was not set!"); + return ERROR_INTERNAL_ERROR; + } + + name = freerdp_settings_get_string(settings, FreeRDP_Username); + + if (!name) + name = "Expert"; + + const char* stub = freerdp_settings_get_string(settings, FreeRDP_RemoteAssistancePassStub); + remdesk->EncryptedPassStub = + freerdp_assistance_encrypt_pass_stub(password, stub, &(remdesk->EncryptedPassStubSize)); + + if (!remdesk->EncryptedPassStub) + { + WLog_ERR(TAG, "freerdp_assistance_encrypt_pass_stub failed!"); + return ERROR_INTERNAL_ERROR; + } + + pass = freerdp_assistance_bin_to_hex_string(remdesk->EncryptedPassStub, + remdesk->EncryptedPassStubSize); + + if (!pass) + { + WLog_ERR(TAG, "freerdp_assistance_bin_to_hex_string failed!"); + return ERROR_INTERNAL_ERROR; + } + + remdesk->ExpertBlob = freerdp_assistance_construct_expert_blob(name, pass); + free(pass); + + if (!remdesk->ExpertBlob) + { + WLog_ERR(TAG, "freerdp_assistance_construct_expert_blob failed!"); + return ERROR_INTERNAL_ERROR; + } + + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_read_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header) +{ + UINT32 ChannelNameLen = 0; + + WINPR_ASSERT(s); + WINPR_ASSERT(header); + + if (!Stream_CheckAndLogRequiredLength(TAG, s, 8)) + return ERROR_INVALID_DATA; + + Stream_Read_UINT32(s, ChannelNameLen); /* ChannelNameLen (4 bytes) */ + Stream_Read_UINT32(s, header->DataLength); /* DataLen (4 bytes) */ + + if (ChannelNameLen > 64) + { + WLog_ERR(TAG, "ChannelNameLen > 64!"); + return ERROR_INVALID_DATA; + } + + if ((ChannelNameLen % 2) != 0) + { + WLog_ERR(TAG, "ChannelNameLen %% 2) != 0 "); + return ERROR_INVALID_DATA; + } + + if (Stream_Read_UTF16_String_As_UTF8_Buffer(s, ChannelNameLen / sizeof(WCHAR), + header->ChannelName, + ARRAYSIZE(header->ChannelName)) < 0) + return ERROR_INTERNAL_ERROR; + + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_write_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header) +{ + UINT32 ChannelNameLen = 0; + WCHAR ChannelNameW[32] = { 0 }; + + WINPR_ASSERT(s); + WINPR_ASSERT(header); + + for (size_t index = 0; index < 32; index++) + { + ChannelNameW[index] = (WCHAR)header->ChannelName[index]; + } + + ChannelNameLen = (strnlen(header->ChannelName, sizeof(header->ChannelName)) + 1) * 2; + Stream_Write_UINT32(s, ChannelNameLen); /* ChannelNameLen (4 bytes) */ + Stream_Write_UINT32(s, header->DataLength); /* DataLen (4 bytes) */ + Stream_Write(s, ChannelNameW, ChannelNameLen); /* ChannelName (variable) */ + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_write_ctl_header(wStream* s, REMDESK_CTL_HEADER* ctlHeader) +{ + WINPR_ASSERT(s); + WINPR_ASSERT(ctlHeader); + + remdesk_write_channel_header(s, &ctlHeader->ch); + Stream_Write_UINT32(s, ctlHeader->msgType); /* msgType (4 bytes) */ + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_prepare_ctl_header(REMDESK_CTL_HEADER* ctlHeader, UINT32 msgType, + UINT32 msgSize) +{ + WINPR_ASSERT(ctlHeader); + + ctlHeader->msgType = msgType; + sprintf_s(ctlHeader->ch.ChannelName, ARRAYSIZE(ctlHeader->ch.ChannelName), + REMDESK_CHANNEL_CTL_NAME); + ctlHeader->ch.DataLength = 4 + msgSize; + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_recv_ctl_server_announce_pdu(remdeskPlugin* remdesk, wStream* s, + REMDESK_CHANNEL_HEADER* header) +{ + WINPR_ASSERT(remdesk); + WINPR_ASSERT(s); + WINPR_ASSERT(header); + + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_recv_ctl_version_info_pdu(remdeskPlugin* remdesk, wStream* s, + REMDESK_CHANNEL_HEADER* header) +{ + UINT32 versionMajor = 0; + UINT32 versionMinor = 0; + + WINPR_ASSERT(remdesk); + WINPR_ASSERT(s); + WINPR_ASSERT(header); + + if (!Stream_CheckAndLogRequiredLength(TAG, s, 8)) + return ERROR_INVALID_DATA; + + Stream_Read_UINT32(s, versionMajor); /* versionMajor (4 bytes) */ + Stream_Read_UINT32(s, versionMinor); /* versionMinor (4 bytes) */ + + if ((versionMajor != 1) || (versionMinor > 2) || (versionMinor == 0)) + { + WLog_ERR(TAG, "Unsupported protocol version %" PRId32 ".%" PRId32, versionMajor, + versionMinor); + } + + remdesk->Version = versionMinor; + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_send_ctl_version_info_pdu(remdeskPlugin* remdesk) +{ + wStream* s = NULL; + REMDESK_CTL_VERSION_INFO_PDU pdu; + UINT error = 0; + + WINPR_ASSERT(remdesk); + + remdesk_prepare_ctl_header(&(pdu.ctlHeader), REMDESK_CTL_VERSIONINFO, 8); + pdu.versionMajor = 1; + pdu.versionMinor = 2; + s = Stream_New(NULL, REMDESK_CHANNEL_CTL_SIZE + pdu.ctlHeader.ch.DataLength); + + if (!s) + { + WLog_ERR(TAG, "Stream_New failed!"); + return CHANNEL_RC_NO_MEMORY; + } + + remdesk_write_ctl_header(s, &(pdu.ctlHeader)); + Stream_Write_UINT32(s, pdu.versionMajor); /* versionMajor (4 bytes) */ + Stream_Write_UINT32(s, pdu.versionMinor); /* versionMinor (4 bytes) */ + Stream_SealLength(s); + + if ((error = remdesk_virtual_channel_write(remdesk, s))) + WLog_ERR(TAG, "remdesk_virtual_channel_write failed with error %" PRIu32 "!", error); + + return error; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_recv_ctl_result_pdu(remdeskPlugin* remdesk, wStream* s, + REMDESK_CHANNEL_HEADER* header, UINT32* pResult) +{ + UINT32 result = 0; + + WINPR_ASSERT(remdesk); + WINPR_ASSERT(s); + WINPR_ASSERT(header); + WINPR_ASSERT(pResult); + + if (!Stream_CheckAndLogRequiredLength(TAG, s, 4)) + return ERROR_INVALID_DATA; + + Stream_Read_UINT32(s, result); /* result (4 bytes) */ + *pResult = result; + // WLog_DBG(TAG, "RemdeskRecvResult: 0x%08"PRIX32"", result); + switch (result) + { + case REMDESK_ERROR_HELPEESAIDNO: + WLog_DBG(TAG, "remote assistance connection request was denied"); + return ERROR_CONNECTION_REFUSED; + + default: + break; + } + + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_send_ctl_authenticate_pdu(remdeskPlugin* remdesk) +{ + UINT error = ERROR_INTERNAL_ERROR; + wStream* s = NULL; + size_t cbExpertBlobW = 0; + WCHAR* expertBlobW = NULL; + size_t cbRaConnectionStringW = 0; + WCHAR* raConnectionStringW = NULL; + REMDESK_CTL_AUTHENTICATE_PDU pdu = { 0 }; + rdpSettings* settings = NULL; + + WINPR_ASSERT(remdesk); + + if ((error = remdesk_generate_expert_blob(remdesk))) + { + WLog_ERR(TAG, "remdesk_generate_expert_blob failed with error %" PRIu32 "", error); + return error; + } + + pdu.expertBlob = remdesk->ExpertBlob; + WINPR_ASSERT(remdesk->rdpcontext); + settings = remdesk->rdpcontext->settings; + WINPR_ASSERT(settings); + + pdu.raConnectionString = + freerdp_settings_get_string(settings, FreeRDP_RemoteAssistanceRCTicket); + raConnectionStringW = ConvertUtf8ToWCharAlloc(pdu.raConnectionString, &cbRaConnectionStringW); + + if (!raConnectionStringW || (cbRaConnectionStringW > UINT32_MAX / sizeof(WCHAR))) + goto out; + + cbRaConnectionStringW = cbRaConnectionStringW * sizeof(WCHAR); + + expertBlobW = ConvertUtf8ToWCharAlloc(pdu.expertBlob, &cbExpertBlobW); + + if (!expertBlobW || (cbExpertBlobW > UINT32_MAX / sizeof(WCHAR))) + goto out; + + cbExpertBlobW = cbExpertBlobW * sizeof(WCHAR); + remdesk_prepare_ctl_header(&(pdu.ctlHeader), REMDESK_CTL_AUTHENTICATE, + cbRaConnectionStringW + cbExpertBlobW); + s = Stream_New(NULL, REMDESK_CHANNEL_CTL_SIZE + pdu.ctlHeader.ch.DataLength); + + if (!s) + { + WLog_ERR(TAG, "Stream_New failed!"); + error = CHANNEL_RC_NO_MEMORY; + goto out; + } + + remdesk_write_ctl_header(s, &(pdu.ctlHeader)); + Stream_Write(s, (BYTE*)raConnectionStringW, cbRaConnectionStringW); + Stream_Write(s, (BYTE*)expertBlobW, cbExpertBlobW); + Stream_SealLength(s); + + if ((error = remdesk_virtual_channel_write(remdesk, s))) + WLog_ERR(TAG, "remdesk_virtual_channel_write failed with error %" PRIu32 "!", error); + +out: + free(raConnectionStringW); + free(expertBlobW); + + return error; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_send_ctl_remote_control_desktop_pdu(remdeskPlugin* remdesk) +{ + UINT error = 0; + size_t length = 0; + wStream* s = NULL; + size_t cbRaConnectionStringW = 0; + WCHAR* raConnectionStringW = NULL; + REMDESK_CTL_REMOTE_CONTROL_DESKTOP_PDU pdu = { 0 }; + rdpSettings* settings = NULL; + + WINPR_ASSERT(remdesk); + WINPR_ASSERT(remdesk->rdpcontext); + settings = remdesk->rdpcontext->settings; + WINPR_ASSERT(settings); + + pdu.raConnectionString = + freerdp_settings_get_string(settings, FreeRDP_RemoteAssistanceRCTicket); + raConnectionStringW = ConvertUtf8ToWCharAlloc(pdu.raConnectionString, &length); + + if (!raConnectionStringW) + return ERROR_INTERNAL_ERROR; + + cbRaConnectionStringW = length * sizeof(WCHAR); + remdesk_prepare_ctl_header(&(pdu.ctlHeader), REMDESK_CTL_REMOTE_CONTROL_DESKTOP, + cbRaConnectionStringW); + s = Stream_New(NULL, REMDESK_CHANNEL_CTL_SIZE + pdu.ctlHeader.ch.DataLength); + + if (!s) + { + WLog_ERR(TAG, "Stream_New failed!"); + error = CHANNEL_RC_NO_MEMORY; + goto out; + } + + remdesk_write_ctl_header(s, &(pdu.ctlHeader)); + Stream_Write(s, (BYTE*)raConnectionStringW, cbRaConnectionStringW); + Stream_SealLength(s); + + if ((error = remdesk_virtual_channel_write(remdesk, s))) + WLog_ERR(TAG, "remdesk_virtual_channel_write failed with error %" PRIu32 "!", error); + +out: + free(raConnectionStringW); + + return error; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_send_ctl_verify_password_pdu(remdeskPlugin* remdesk) +{ + UINT error = ERROR_INTERNAL_ERROR; + wStream* s = NULL; + size_t cbExpertBlobW = 0; + WCHAR* expertBlobW = NULL; + REMDESK_CTL_VERIFY_PASSWORD_PDU pdu = { 0 }; + + WINPR_ASSERT(remdesk); + + if ((error = remdesk_generate_expert_blob(remdesk))) + { + WLog_ERR(TAG, "remdesk_generate_expert_blob failed with error %" PRIu32 "!", error); + return error; + } + + pdu.expertBlob = remdesk->ExpertBlob; + expertBlobW = ConvertUtf8ToWCharAlloc(pdu.expertBlob, &cbExpertBlobW); + + if (!expertBlobW || (cbExpertBlobW > UINT32_MAX / sizeof(WCHAR))) + goto out; + + cbExpertBlobW = cbExpertBlobW * sizeof(WCHAR); + remdesk_prepare_ctl_header(&(pdu.ctlHeader), REMDESK_CTL_VERIFY_PASSWORD, cbExpertBlobW); + s = Stream_New(NULL, REMDESK_CHANNEL_CTL_SIZE + pdu.ctlHeader.ch.DataLength); + + if (!s) + { + WLog_ERR(TAG, "Stream_New failed!"); + error = CHANNEL_RC_NO_MEMORY; + goto out; + } + + remdesk_write_ctl_header(s, &(pdu.ctlHeader)); + Stream_Write(s, (BYTE*)expertBlobW, cbExpertBlobW); + Stream_SealLength(s); + + if ((error = remdesk_virtual_channel_write(remdesk, s))) + WLog_ERR(TAG, "remdesk_virtual_channel_write failed with error %" PRIu32 "!", error); + +out: + free(expertBlobW); + + return error; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_send_ctl_expert_on_vista_pdu(remdeskPlugin* remdesk) +{ + UINT error = 0; + wStream* s = NULL; + REMDESK_CTL_EXPERT_ON_VISTA_PDU pdu; + + WINPR_ASSERT(remdesk); + + if ((error = remdesk_generate_expert_blob(remdesk))) + { + WLog_ERR(TAG, "remdesk_generate_expert_blob failed with error %" PRIu32 "!", error); + return error; + } + + pdu.EncryptedPasswordLength = remdesk->EncryptedPassStubSize; + pdu.EncryptedPassword = remdesk->EncryptedPassStub; + remdesk_prepare_ctl_header(&(pdu.ctlHeader), REMDESK_CTL_EXPERT_ON_VISTA, + pdu.EncryptedPasswordLength); + s = Stream_New(NULL, REMDESK_CHANNEL_CTL_SIZE + pdu.ctlHeader.ch.DataLength); + + if (!s) + { + WLog_ERR(TAG, "Stream_New failed!"); + return CHANNEL_RC_NO_MEMORY; + } + + remdesk_write_ctl_header(s, &(pdu.ctlHeader)); + Stream_Write(s, pdu.EncryptedPassword, pdu.EncryptedPasswordLength); + Stream_SealLength(s); + return remdesk_virtual_channel_write(remdesk, s); +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_recv_ctl_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_HEADER* header) +{ + UINT error = CHANNEL_RC_OK; + UINT32 msgType = 0; + UINT32 result = 0; + + WINPR_ASSERT(remdesk); + WINPR_ASSERT(s); + WINPR_ASSERT(header); + + if (!Stream_CheckAndLogRequiredLength(TAG, s, 4)) + return ERROR_INVALID_DATA; + + Stream_Read_UINT32(s, msgType); /* msgType (4 bytes) */ + + // WLog_DBG(TAG, "msgType: %"PRIu32"", msgType); + + switch (msgType) + { + case REMDESK_CTL_REMOTE_CONTROL_DESKTOP: + break; + + case REMDESK_CTL_RESULT: + if ((error = remdesk_recv_ctl_result_pdu(remdesk, s, header, &result))) + WLog_ERR(TAG, "remdesk_recv_ctl_result_pdu failed with error %" PRIu32 "", error); + + break; + + case REMDESK_CTL_AUTHENTICATE: + break; + + case REMDESK_CTL_SERVER_ANNOUNCE: + if ((error = remdesk_recv_ctl_server_announce_pdu(remdesk, s, header))) + WLog_ERR(TAG, "remdesk_recv_ctl_server_announce_pdu failed with error %" PRIu32 "", + error); + + break; + + case REMDESK_CTL_DISCONNECT: + break; + + case REMDESK_CTL_VERSIONINFO: + if ((error = remdesk_recv_ctl_version_info_pdu(remdesk, s, header))) + { + WLog_ERR(TAG, "remdesk_recv_ctl_version_info_pdu failed with error %" PRIu32 "", + error); + break; + } + + if (remdesk->Version == 1) + { + if ((error = remdesk_send_ctl_version_info_pdu(remdesk))) + { + WLog_ERR(TAG, "remdesk_send_ctl_version_info_pdu failed with error %" PRIu32 "", + error); + break; + } + + if ((error = remdesk_send_ctl_authenticate_pdu(remdesk))) + { + WLog_ERR(TAG, "remdesk_send_ctl_authenticate_pdu failed with error %" PRIu32 "", + error); + break; + } + + if ((error = remdesk_send_ctl_remote_control_desktop_pdu(remdesk))) + { + WLog_ERR( + TAG, + "remdesk_send_ctl_remote_control_desktop_pdu failed with error %" PRIu32 "", + error); + break; + } + } + else if (remdesk->Version == 2) + { + if ((error = remdesk_send_ctl_expert_on_vista_pdu(remdesk))) + { + WLog_ERR(TAG, + "remdesk_send_ctl_expert_on_vista_pdu failed with error %" PRIu32 "", + error); + break; + } + + if ((error = remdesk_send_ctl_verify_password_pdu(remdesk))) + { + WLog_ERR(TAG, + "remdesk_send_ctl_verify_password_pdu failed with error %" PRIu32 "", + error); + break; + } + } + + break; + + case REMDESK_CTL_ISCONNECTED: + break; + + case REMDESK_CTL_VERIFY_PASSWORD: + 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, "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_process_receive(remdeskPlugin* remdesk, wStream* s) +{ + UINT status = 0; + REMDESK_CHANNEL_HEADER header; + + WINPR_ASSERT(remdesk); + WINPR_ASSERT(s); + +#if 0 + WLog_DBG(TAG, "RemdeskReceive: %"PRIuz"", Stream_GetRemainingLength(s)); + winpr_HexDump(Stream_ConstPointer(s), Stream_GetRemainingLength(s)); +#endif + + if ((status = remdesk_read_channel_header(s, &header))) + { + WLog_ERR(TAG, "remdesk_read_channel_header failed with error %" PRIu32 "", status); + return status; + } + + if (strcmp(header.ChannelName, "RC_CTL") == 0) + { + status = remdesk_recv_ctl_pdu(remdesk, s, &header); + } + 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 status; +} + +static void remdesk_process_connect(remdeskPlugin* remdesk) +{ + WINPR_ASSERT(remdesk); +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_virtual_channel_event_data_received(remdeskPlugin* remdesk, const void* pData, + UINT32 dataLength, UINT32 totalLength, + UINT32 dataFlags) +{ + wStream* data_in = NULL; + + WINPR_ASSERT(remdesk); + + if ((dataFlags & CHANNEL_FLAG_SUSPEND) || (dataFlags & CHANNEL_FLAG_RESUME)) + { + return CHANNEL_RC_OK; + } + + if (dataFlags & CHANNEL_FLAG_FIRST) + { + if (remdesk->data_in) + Stream_Free(remdesk->data_in, TRUE); + + remdesk->data_in = Stream_New(NULL, totalLength); + + if (!remdesk->data_in) + { + WLog_ERR(TAG, "Stream_New failed!"); + return CHANNEL_RC_NO_MEMORY; + } + } + + data_in = remdesk->data_in; + + if (!Stream_EnsureRemainingCapacity(data_in, dataLength)) + { + WLog_ERR(TAG, "Stream_EnsureRemainingCapacity failed!"); + return CHANNEL_RC_NO_MEMORY; + } + + Stream_Write(data_in, pData, dataLength); + + if (dataFlags & CHANNEL_FLAG_LAST) + { + if (Stream_Capacity(data_in) != Stream_GetPosition(data_in)) + { + WLog_ERR(TAG, "read error"); + return ERROR_INTERNAL_ERROR; + } + + remdesk->data_in = NULL; + Stream_SealLength(data_in); + Stream_SetPosition(data_in, 0); + + if (!MessageQueue_Post(remdesk->queue, NULL, 0, (void*)data_in, NULL)) + { + WLog_ERR(TAG, "MessageQueue_Post failed!"); + return ERROR_INTERNAL_ERROR; + } + } + + return CHANNEL_RC_OK; +} + +static VOID VCAPITYPE remdesk_virtual_channel_open_event_ex(LPVOID lpUserParam, DWORD openHandle, + UINT event, LPVOID pData, + UINT32 dataLength, UINT32 totalLength, + UINT32 dataFlags) +{ + UINT error = CHANNEL_RC_OK; + remdeskPlugin* remdesk = (remdeskPlugin*)lpUserParam; + + switch (event) + { + case CHANNEL_EVENT_INITIALIZED: + break; + + case CHANNEL_EVENT_DATA_RECEIVED: + if (!remdesk || (remdesk->OpenHandle != openHandle)) + { + WLog_ERR(TAG, "error no match"); + return; + } + if ((error = remdesk_virtual_channel_event_data_received(remdesk, pData, dataLength, + totalLength, dataFlags))) + WLog_ERR(TAG, + "remdesk_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; + + default: + WLog_ERR(TAG, "unhandled event %" PRIu32 "!", event); + error = ERROR_INTERNAL_ERROR; + break; + } + + if (error && remdesk && remdesk->rdpcontext) + setChannelError(remdesk->rdpcontext, error, + "remdesk_virtual_channel_open_event_ex reported an error"); +} + +static DWORD WINAPI remdesk_virtual_channel_client_thread(LPVOID arg) +{ + wStream* data = NULL; + wMessage message = { 0 }; + remdeskPlugin* remdesk = (remdeskPlugin*)arg; + UINT error = CHANNEL_RC_OK; + + WINPR_ASSERT(remdesk); + + remdesk_process_connect(remdesk); + + while (1) + { + if (!MessageQueue_Wait(remdesk->queue)) + { + WLog_ERR(TAG, "MessageQueue_Wait failed!"); + error = ERROR_INTERNAL_ERROR; + break; + } + + if (!MessageQueue_Peek(remdesk->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 = remdesk_process_receive(remdesk, data))) + { + WLog_ERR(TAG, "remdesk_process_receive failed with error %" PRIu32 "!", error); + Stream_Free(data, TRUE); + break; + } + + Stream_Free(data, TRUE); + } + } + + if (error && remdesk->rdpcontext) + setChannelError(remdesk->rdpcontext, error, + "remdesk_virtual_channel_client_thread reported an error"); + + ExitThread(error); + return error; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_virtual_channel_event_connected(remdeskPlugin* remdesk, LPVOID pData, + UINT32 dataLength) +{ + UINT error = 0; + + WINPR_ASSERT(remdesk); + + remdesk->queue = MessageQueue_New(NULL); + + if (!remdesk->queue) + { + WLog_ERR(TAG, "MessageQueue_New failed!"); + error = CHANNEL_RC_NO_MEMORY; + goto error_out; + } + + remdesk->thread = + CreateThread(NULL, 0, remdesk_virtual_channel_client_thread, (void*)remdesk, 0, NULL); + + if (!remdesk->thread) + { + WLog_ERR(TAG, "CreateThread failed"); + error = ERROR_INTERNAL_ERROR; + goto error_out; + } + + return remdesk->channelEntryPoints.pVirtualChannelOpenEx( + remdesk->InitHandle, &remdesk->OpenHandle, remdesk->channelDef.name, + remdesk_virtual_channel_open_event_ex); +error_out: + MessageQueue_Free(remdesk->queue); + remdesk->queue = NULL; + return error; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +static UINT remdesk_virtual_channel_event_disconnected(remdeskPlugin* remdesk) +{ + UINT rc = CHANNEL_RC_OK; + + WINPR_ASSERT(remdesk); + + if (remdesk->queue && remdesk->thread) + { + if (MessageQueue_PostQuit(remdesk->queue, 0) && + (WaitForSingleObject(remdesk->thread, INFINITE) == WAIT_FAILED)) + { + rc = GetLastError(); + WLog_ERR(TAG, "WaitForSingleObject failed with error %" PRIu32 "", rc); + return rc; + } + } + + if (remdesk->OpenHandle != 0) + { + WINPR_ASSERT(remdesk->channelEntryPoints.pVirtualChannelCloseEx); + rc = remdesk->channelEntryPoints.pVirtualChannelCloseEx(remdesk->InitHandle, + remdesk->OpenHandle); + + if (CHANNEL_RC_OK != rc) + { + WLog_ERR(TAG, "pVirtualChannelCloseEx failed with %s [%08" PRIX32 "]", + WTSErrorToString(rc), rc); + } + + remdesk->OpenHandle = 0; + } + MessageQueue_Free(remdesk->queue); + CloseHandle(remdesk->thread); + Stream_Free(remdesk->data_in, TRUE); + remdesk->data_in = NULL; + remdesk->queue = NULL; + remdesk->thread = NULL; + return rc; +} + +static void remdesk_virtual_channel_event_terminated(remdeskPlugin* remdesk) +{ + WINPR_ASSERT(remdesk); + + remdesk->InitHandle = 0; + free(remdesk->context); + free(remdesk); +} + +static VOID VCAPITYPE remdesk_virtual_channel_init_event_ex(LPVOID lpUserParam, LPVOID pInitHandle, + UINT event, LPVOID pData, + UINT dataLength) +{ + UINT error = CHANNEL_RC_OK; + remdeskPlugin* remdesk = (remdeskPlugin*)lpUserParam; + + if (!remdesk || (remdesk->InitHandle != pInitHandle)) + { + WLog_ERR(TAG, "error no match"); + return; + } + + switch (event) + { + case CHANNEL_EVENT_CONNECTED: + if ((error = remdesk_virtual_channel_event_connected(remdesk, pData, dataLength))) + WLog_ERR(TAG, + "remdesk_virtual_channel_event_connected failed with error %" PRIu32 "", + error); + + break; + + case CHANNEL_EVENT_DISCONNECTED: + if ((error = remdesk_virtual_channel_event_disconnected(remdesk))) + WLog_ERR(TAG, + "remdesk_virtual_channel_event_disconnected failed with error %" PRIu32 "", + error); + + break; + + case CHANNEL_EVENT_TERMINATED: + remdesk_virtual_channel_event_terminated(remdesk); + break; + + case CHANNEL_EVENT_ATTACHED: + case CHANNEL_EVENT_DETACHED: + default: + break; + } + + if (error && remdesk->rdpcontext) + setChannelError(remdesk->rdpcontext, error, + "remdesk_virtual_channel_init_event reported an error"); +} + +/* remdesk is always built-in */ +#define VirtualChannelEntryEx remdesk_VirtualChannelEntryEx + +FREERDP_ENTRY_POINT(BOOL VCAPITYPE VirtualChannelEntryEx(PCHANNEL_ENTRY_POINTS pEntryPoints, + PVOID pInitHandle)) +{ + UINT rc = 0; + remdeskPlugin* remdesk = NULL; + RemdeskClientContext* context = NULL; + CHANNEL_ENTRY_POINTS_FREERDP_EX* pEntryPointsEx = NULL; + + if (!pEntryPoints) + { + return FALSE; + } + + remdesk = (remdeskPlugin*)calloc(1, sizeof(remdeskPlugin)); + + if (!remdesk) + { + WLog_ERR(TAG, "calloc failed!"); + return FALSE; + } + + remdesk->channelDef.options = CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP | + CHANNEL_OPTION_COMPRESS_RDP | CHANNEL_OPTION_SHOW_PROTOCOL; + sprintf_s(remdesk->channelDef.name, ARRAYSIZE(remdesk->channelDef.name), + REMDESK_SVC_CHANNEL_NAME); + remdesk->Version = 2; + pEntryPointsEx = (CHANNEL_ENTRY_POINTS_FREERDP_EX*)pEntryPoints; + + if ((pEntryPointsEx->cbSize >= sizeof(CHANNEL_ENTRY_POINTS_FREERDP_EX)) && + (pEntryPointsEx->MagicNumber == FREERDP_CHANNEL_MAGIC_NUMBER)) + { + context = (RemdeskClientContext*)calloc(1, sizeof(RemdeskClientContext)); + + if (!context) + { + WLog_ERR(TAG, "calloc failed!"); + goto error_out; + } + + context->handle = (void*)remdesk; + remdesk->context = context; + remdesk->rdpcontext = pEntryPointsEx->context; + } + + CopyMemory(&(remdesk->channelEntryPoints), pEntryPoints, + sizeof(CHANNEL_ENTRY_POINTS_FREERDP_EX)); + remdesk->InitHandle = pInitHandle; + rc = remdesk->channelEntryPoints.pVirtualChannelInitEx( + remdesk, context, pInitHandle, &remdesk->channelDef, 1, VIRTUAL_CHANNEL_VERSION_WIN2000, + remdesk_virtual_channel_init_event_ex); + + if (CHANNEL_RC_OK != rc) + { + WLog_ERR(TAG, "pVirtualChannelInitEx failed with %s [%08" PRIX32 "]", WTSErrorToString(rc), + rc); + goto error_out; + } + + remdesk->channelEntryPoints.pInterface = context; + return TRUE; +error_out: + free(remdesk); + free(context); + return FALSE; +} |