714 lines
16 KiB
C
714 lines
16 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Dynamic Virtual Channel
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*
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* Copyright 2010-2011 Vic Lee
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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/stream.h>
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#include <freerdp/constants.h>
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#include "dvcman.h"
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#include "drdynvc_types.h"
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#include "drdynvc_main.h"
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static int drdynvc_write_variable_uint(wStream* s, UINT32 val)
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{
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int cb;
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if (val <= 0xFF)
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{
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cb = 0;
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Stream_Write_UINT8(s, val);
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}
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else if (val <= 0xFFFF)
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{
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cb = 1;
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Stream_Write_UINT16(s, val);
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}
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else
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{
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cb = 2;
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Stream_Write_UINT32(s, val);
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}
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return cb;
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}
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int drdynvc_send(drdynvcPlugin* drdynvc, wStream* s)
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{
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UINT32 status = 0;
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if (!drdynvc)
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{
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status = CHANNEL_RC_BAD_INIT_HANDLE;
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}
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else
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{
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status = drdynvc->channelEntryPoints.pVirtualChannelWrite(drdynvc->OpenHandle,
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Stream_Buffer(s), (UINT32) Stream_GetPosition(s), s);
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}
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if (status != CHANNEL_RC_OK)
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{
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Stream_Free(s, TRUE);
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WLog_ERR(TAG, "drdynvc_send: VirtualChannelWrite failed %d", status);
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}
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return status;
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}
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int drdynvc_write_data(drdynvcPlugin* drdynvc, UINT32 ChannelId, BYTE* data, UINT32 dataSize)
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{
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wStream* data_out;
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UINT32 pos = 0;
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UINT32 cbChId;
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UINT32 cbLen;
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UINT32 chunkLength;
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int status;
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DEBUG_DVC("ChannelId=%d size=%d", ChannelId, dataSize);
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if (drdynvc->channel_error != CHANNEL_RC_OK)
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return 1;
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data_out = Stream_New(NULL, CHANNEL_CHUNK_LENGTH);
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Stream_SetPosition(data_out, 1);
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cbChId = drdynvc_write_variable_uint(data_out, ChannelId);
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if (dataSize == 0)
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{
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pos = Stream_GetPosition(data_out);
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Stream_SetPosition(data_out, 0);
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Stream_Write_UINT8(data_out, 0x40 | cbChId);
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Stream_SetPosition(data_out, pos);
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status = drdynvc_send(drdynvc, data_out);
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}
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else if (dataSize <= CHANNEL_CHUNK_LENGTH - pos)
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{
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pos = Stream_GetPosition(data_out);
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Stream_SetPosition(data_out, 0);
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Stream_Write_UINT8(data_out, 0x30 | cbChId);
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Stream_SetPosition(data_out, pos);
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Stream_Write(data_out, data, dataSize);
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status = drdynvc_send(drdynvc, data_out);
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}
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else
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{
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/* Fragment the data */
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cbLen = drdynvc_write_variable_uint(data_out, dataSize);
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pos = Stream_GetPosition(data_out);
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Stream_SetPosition(data_out, 0);
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Stream_Write_UINT8(data_out, 0x20 | cbChId | (cbLen << 2));
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Stream_SetPosition(data_out, pos);
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chunkLength = CHANNEL_CHUNK_LENGTH - pos;
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Stream_Write(data_out, data, chunkLength);
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data += chunkLength;
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dataSize -= chunkLength;
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status = drdynvc_send(drdynvc, data_out);
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while (status == CHANNEL_RC_OK && dataSize > 0)
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{
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data_out = Stream_New(NULL, CHANNEL_CHUNK_LENGTH);
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Stream_SetPosition(data_out, 1);
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cbChId = drdynvc_write_variable_uint(data_out, ChannelId);
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pos = Stream_GetPosition(data_out);
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Stream_SetPosition(data_out, 0);
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Stream_Write_UINT8(data_out, 0x30 | cbChId);
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Stream_SetPosition(data_out, pos);
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chunkLength = dataSize;
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if (chunkLength > CHANNEL_CHUNK_LENGTH - pos)
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chunkLength = CHANNEL_CHUNK_LENGTH - pos;
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Stream_Write(data_out, data, chunkLength);
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data += chunkLength;
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dataSize -= chunkLength;
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status = drdynvc_send(drdynvc, data_out);
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}
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}
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if (status != CHANNEL_RC_OK)
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{
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drdynvc->channel_error = status;
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WLog_ERR(TAG, "VirtualChannelWrite failed %d", status);
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return 1;
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}
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return 0;
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}
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static int drdynvc_send_capability_response(drdynvcPlugin* drdynvc)
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{
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int status;
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wStream* s;
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s = Stream_New(NULL, 4);
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Stream_Write_UINT16(s, 0x0050); /* Cmd+Sp+cbChId+Pad. Note: MSTSC sends 0x005c */
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Stream_Write_UINT16(s, drdynvc->version);
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status = drdynvc_send(drdynvc, s);
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if (status != CHANNEL_RC_OK)
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{
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WLog_ERR(TAG, "VirtualChannelWrite failed %d", status);
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return 1;
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}
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return status;
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}
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static int drdynvc_process_capability_request(drdynvcPlugin* drdynvc, int Sp, int cbChId, wStream* s)
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{
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int status;
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DEBUG_DVC("Sp=%d cbChId=%d", Sp, cbChId);
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Stream_Seek(s, 1); /* pad */
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Stream_Read_UINT16(s, drdynvc->version);
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/* RDP8 servers offer version 3, though Microsoft forgot to document it
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* in their early documents. It behaves the same as version 2.
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*/
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if ((drdynvc->version == 2) || (drdynvc->version == 3))
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{
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Stream_Read_UINT16(s, drdynvc->PriorityCharge0);
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Stream_Read_UINT16(s, drdynvc->PriorityCharge1);
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Stream_Read_UINT16(s, drdynvc->PriorityCharge2);
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Stream_Read_UINT16(s, drdynvc->PriorityCharge3);
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}
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status = drdynvc_send_capability_response(drdynvc);
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drdynvc->channel_error = status;
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drdynvc->state = DRDYNVC_STATE_READY;
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return 0;
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}
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static UINT32 drdynvc_read_variable_uint(wStream* s, int cbLen)
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{
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UINT32 val;
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switch (cbLen)
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{
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case 0:
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Stream_Read_UINT8(s, val);
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break;
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case 1:
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Stream_Read_UINT16(s, val);
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break;
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default:
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Stream_Read_UINT32(s, val);
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break;
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}
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return val;
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}
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static int drdynvc_process_create_request(drdynvcPlugin* drdynvc, int Sp, int cbChId, wStream* s)
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{
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int pos;
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int status;
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UINT32 ChannelId;
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wStream* data_out;
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int channel_status;
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if (drdynvc->state == DRDYNVC_STATE_CAPABILITIES)
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{
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/**
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* For some reason the server does not always send the
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* capabilities pdu as it should. When this happens,
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* send a capabilities response.
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*/
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drdynvc->version = 3;
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drdynvc_send_capability_response(drdynvc);
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drdynvc->state = DRDYNVC_STATE_READY;
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}
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ChannelId = drdynvc_read_variable_uint(s, cbChId);
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pos = Stream_GetPosition(s);
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DEBUG_DVC("ChannelId=%d ChannelName=%s", ChannelId, Stream_Pointer(s));
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channel_status = dvcman_create_channel(drdynvc->channel_mgr, ChannelId, (char*) Stream_Pointer(s));
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data_out = Stream_New(NULL, pos + 4);
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Stream_Write_UINT8(data_out, 0x10 | cbChId);
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Stream_SetPosition(s, 1);
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Stream_Copy(data_out, s, pos - 1);
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if (channel_status == 0)
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{
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DEBUG_DVC("channel created");
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Stream_Write_UINT32(data_out, 0);
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}
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else
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{
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DEBUG_DVC("no listener");
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Stream_Write_UINT32(data_out, (UINT32)(-1));
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}
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status = drdynvc_send(drdynvc, data_out);
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if (status != CHANNEL_RC_OK)
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{
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WLog_ERR(TAG, "VirtualChannelWrite failed %d", status);
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return 1;
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}
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if (channel_status == 0)
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{
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dvcman_open_channel(drdynvc->channel_mgr, ChannelId);
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}
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return 0;
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}
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static int drdynvc_process_data_first(drdynvcPlugin* drdynvc, int Sp, int cbChId, wStream* s)
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{
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int status;
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UINT32 Length;
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UINT32 ChannelId;
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ChannelId = drdynvc_read_variable_uint(s, cbChId);
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Length = drdynvc_read_variable_uint(s, Sp);
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DEBUG_DVC("ChannelId=%d Length=%d", ChannelId, Length);
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status = dvcman_receive_channel_data_first(drdynvc->channel_mgr, ChannelId, Length);
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if (status)
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return status;
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return dvcman_receive_channel_data(drdynvc->channel_mgr, ChannelId, s);
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}
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static int drdynvc_process_data(drdynvcPlugin* drdynvc, int Sp, int cbChId, wStream* s)
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{
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UINT32 ChannelId;
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ChannelId = drdynvc_read_variable_uint(s, cbChId);
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DEBUG_DVC("ChannelId=%d", ChannelId);
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return dvcman_receive_channel_data(drdynvc->channel_mgr, ChannelId, s);
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}
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static int drdynvc_process_close_request(drdynvcPlugin* drdynvc, int Sp, int cbChId, wStream* s)
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{
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int value;
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int error;
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UINT32 ChannelId;
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wStream* data_out;
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ChannelId = drdynvc_read_variable_uint(s, cbChId);
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DEBUG_DVC("ChannelId=%d", ChannelId);
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dvcman_close_channel(drdynvc->channel_mgr, ChannelId);
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data_out = Stream_New(NULL, 4);
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value = (CLOSE_REQUEST_PDU << 4) | (cbChId & 0x03);
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Stream_Write_UINT8(data_out, value);
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drdynvc_write_variable_uint(data_out, ChannelId);
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error = drdynvc_send(drdynvc, data_out);
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if (error != CHANNEL_RC_OK)
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{
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WLog_ERR(TAG, "VirtualChannelWrite failed %d", error);
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return 1;
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}
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drdynvc->channel_error = error;
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return 0;
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}
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static void drdynvc_order_recv(drdynvcPlugin* drdynvc, wStream* s)
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{
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int value;
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int Cmd;
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int Sp;
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int cbChId;
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Stream_Read_UINT8(s, value);
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Cmd = (value & 0xf0) >> 4;
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Sp = (value & 0x0c) >> 2;
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cbChId = (value & 0x03) >> 0;
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DEBUG_DVC("Cmd=0x%x", Cmd);
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switch (Cmd)
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{
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case CAPABILITY_REQUEST_PDU:
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drdynvc_process_capability_request(drdynvc, Sp, cbChId, s);
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break;
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case CREATE_REQUEST_PDU:
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drdynvc_process_create_request(drdynvc, Sp, cbChId, s);
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break;
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case DATA_FIRST_PDU:
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drdynvc_process_data_first(drdynvc, Sp, cbChId, s);
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break;
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case DATA_PDU:
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drdynvc_process_data(drdynvc, Sp, cbChId, s);
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break;
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case CLOSE_REQUEST_PDU:
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drdynvc_process_close_request(drdynvc, Sp, cbChId, s);
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break;
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default:
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WLog_ERR(TAG, "unknown drdynvc cmd 0x%x", Cmd);
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break;
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}
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}
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/****************************************************************************************/
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static wListDictionary* g_InitHandles;
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static wListDictionary* g_OpenHandles;
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void drdynvc_add_init_handle_data(void* pInitHandle, void* pUserData)
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{
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if (!g_InitHandles)
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g_InitHandles = ListDictionary_New(TRUE);
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ListDictionary_Add(g_InitHandles, pInitHandle, pUserData);
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}
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void* drdynvc_get_init_handle_data(void* pInitHandle)
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{
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void* pUserData = NULL;
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pUserData = ListDictionary_GetItemValue(g_InitHandles, pInitHandle);
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return pUserData;
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}
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void drdynvc_remove_init_handle_data(void* pInitHandle)
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{
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ListDictionary_Remove(g_InitHandles, pInitHandle);
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}
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void drdynvc_add_open_handle_data(DWORD openHandle, void* pUserData)
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{
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void* pOpenHandle = (void*) (size_t) openHandle;
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if (!g_OpenHandles)
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g_OpenHandles = ListDictionary_New(TRUE);
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ListDictionary_Add(g_OpenHandles, pOpenHandle, pUserData);
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}
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void* drdynvc_get_open_handle_data(DWORD openHandle)
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{
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void* pUserData = NULL;
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void* pOpenHandle = (void*) (size_t) openHandle;
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pUserData = ListDictionary_GetItemValue(g_OpenHandles, pOpenHandle);
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return pUserData;
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}
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void drdynvc_remove_open_handle_data(DWORD openHandle)
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{
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void* pOpenHandle = (void*) (size_t) openHandle;
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ListDictionary_Remove(g_OpenHandles, pOpenHandle);
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}
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static void drdynvc_virtual_channel_event_data_received(drdynvcPlugin* drdynvc,
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void* pData, UINT32 dataLength, UINT32 totalLength, UINT32 dataFlags)
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{
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wStream* data_in;
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if ((dataFlags & CHANNEL_FLAG_SUSPEND) || (dataFlags & CHANNEL_FLAG_RESUME))
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{
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return;
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}
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if (dataFlags & CHANNEL_FLAG_FIRST)
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{
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if (drdynvc->data_in)
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Stream_Free(drdynvc->data_in, TRUE);
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drdynvc->data_in = Stream_New(NULL, totalLength);
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}
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data_in = drdynvc->data_in;
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Stream_EnsureRemainingCapacity(data_in, (int) dataLength);
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Stream_Write(data_in, pData, dataLength);
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if (dataFlags & CHANNEL_FLAG_LAST)
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{
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if (Stream_Capacity(data_in) != Stream_GetPosition(data_in))
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{
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WLog_ERR(TAG, "drdynvc_plugin_process_received: read error");
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}
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drdynvc->data_in = NULL;
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Stream_SealLength(data_in);
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Stream_SetPosition(data_in, 0);
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MessageQueue_Post(drdynvc->MsgPipe->In, NULL, 0, (void*) data_in, NULL);
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}
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}
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static VOID VCAPITYPE drdynvc_virtual_channel_open_event(DWORD openHandle, UINT event,
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LPVOID pData, UINT32 dataLength, UINT32 totalLength, UINT32 dataFlags)
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{
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drdynvcPlugin* drdynvc;
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drdynvc = (drdynvcPlugin*) drdynvc_get_open_handle_data(openHandle);
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if (!drdynvc)
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{
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WLog_ERR(TAG, "drdynvc_virtual_channel_open_event: error no match");
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return;
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}
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switch (event)
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{
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case CHANNEL_EVENT_DATA_RECEIVED:
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drdynvc_virtual_channel_event_data_received(drdynvc, pData, dataLength, totalLength, dataFlags);
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break;
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case CHANNEL_EVENT_WRITE_COMPLETE:
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Stream_Free((wStream*) pData, TRUE);
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break;
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case CHANNEL_EVENT_USER:
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break;
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}
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}
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static void* drdynvc_virtual_channel_client_thread(void* arg)
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{
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wStream* data;
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wMessage message;
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drdynvcPlugin* drdynvc = (drdynvcPlugin*) arg;
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while (1)
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{
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if (!MessageQueue_Wait(drdynvc->MsgPipe->In))
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break;
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if (MessageQueue_Peek(drdynvc->MsgPipe->In, &message, TRUE))
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{
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if (message.id == WMQ_QUIT)
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break;
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if (message.id == 0)
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{
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data = (wStream*) message.wParam;
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drdynvc_order_recv(drdynvc, data);
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Stream_Free(data, TRUE);
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}
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}
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}
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ExitThread(0);
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return NULL;
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}
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static void drdynvc_virtual_channel_event_connected(drdynvcPlugin* drdynvc, LPVOID pData, UINT32 dataLength)
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{
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UINT32 status;
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UINT32 index;
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ADDIN_ARGV* args;
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rdpSettings* settings;
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status = drdynvc->channelEntryPoints.pVirtualChannelOpen(drdynvc->InitHandle,
|
|
&drdynvc->OpenHandle, drdynvc->channelDef.name, drdynvc_virtual_channel_open_event);
|
|
|
|
drdynvc_add_open_handle_data(drdynvc->OpenHandle, drdynvc);
|
|
|
|
if (status != CHANNEL_RC_OK)
|
|
{
|
|
WLog_ERR(TAG, "drdynvc_virtual_channel_event_connected: open failed: status: %d", status);
|
|
return;
|
|
}
|
|
|
|
drdynvc->MsgPipe = MessagePipe_New();
|
|
|
|
drdynvc->channel_mgr = dvcman_new(drdynvc);
|
|
drdynvc->channel_error = 0;
|
|
|
|
settings = (rdpSettings*) drdynvc->channelEntryPoints.pExtendedData;
|
|
|
|
for (index = 0; index < settings->DynamicChannelCount; index++)
|
|
{
|
|
args = settings->DynamicChannelArray[index];
|
|
dvcman_load_addin(drdynvc->channel_mgr, args, settings);
|
|
}
|
|
|
|
dvcman_init(drdynvc->channel_mgr);
|
|
|
|
drdynvc->state = DRDYNVC_STATE_CAPABILITIES;
|
|
|
|
drdynvc->thread = CreateThread(NULL, 0,
|
|
(LPTHREAD_START_ROUTINE) drdynvc_virtual_channel_client_thread, (void*) drdynvc, 0, NULL);
|
|
}
|
|
|
|
static void drdynvc_virtual_channel_event_terminated(drdynvcPlugin* drdynvc)
|
|
{
|
|
if (drdynvc->MsgPipe)
|
|
{
|
|
MessagePipe_PostQuit(drdynvc->MsgPipe, 0);
|
|
WaitForSingleObject(drdynvc->thread, INFINITE);
|
|
|
|
MessagePipe_Free(drdynvc->MsgPipe);
|
|
drdynvc->MsgPipe = NULL;
|
|
|
|
CloseHandle(drdynvc->thread);
|
|
drdynvc->thread = NULL;
|
|
}
|
|
|
|
drdynvc->channelEntryPoints.pVirtualChannelClose(drdynvc->OpenHandle);
|
|
|
|
if (drdynvc->data_in)
|
|
{
|
|
Stream_Free(drdynvc->data_in, TRUE);
|
|
drdynvc->data_in = NULL;
|
|
}
|
|
|
|
if (drdynvc->channel_mgr)
|
|
{
|
|
dvcman_free(drdynvc->channel_mgr);
|
|
drdynvc->channel_mgr = NULL;
|
|
}
|
|
|
|
drdynvc_remove_open_handle_data(drdynvc->OpenHandle);
|
|
drdynvc_remove_init_handle_data(drdynvc->InitHandle);
|
|
}
|
|
|
|
static VOID VCAPITYPE drdynvc_virtual_channel_init_event(LPVOID pInitHandle, UINT event, LPVOID pData, UINT dataLength)
|
|
{
|
|
drdynvcPlugin* drdynvc;
|
|
|
|
drdynvc = (drdynvcPlugin*) drdynvc_get_init_handle_data(pInitHandle);
|
|
|
|
if (!drdynvc)
|
|
{
|
|
WLog_ERR(TAG, "drdynvc_virtual_channel_init_event: error no match");
|
|
return;
|
|
}
|
|
|
|
switch (event)
|
|
{
|
|
case CHANNEL_EVENT_CONNECTED:
|
|
drdynvc_virtual_channel_event_connected(drdynvc, pData, dataLength);
|
|
break;
|
|
|
|
case CHANNEL_EVENT_DISCONNECTED:
|
|
break;
|
|
|
|
case CHANNEL_EVENT_TERMINATED:
|
|
drdynvc_virtual_channel_event_terminated(drdynvc);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Channel Client Interface
|
|
*/
|
|
|
|
int drdynvc_get_version(DrdynvcClientContext* context)
|
|
{
|
|
drdynvcPlugin* drdynvc = (drdynvcPlugin*) context->handle;
|
|
return drdynvc->version;
|
|
}
|
|
|
|
/* drdynvc is always built-in */
|
|
#define VirtualChannelEntry drdynvc_VirtualChannelEntry
|
|
|
|
BOOL VCAPITYPE VirtualChannelEntry(PCHANNEL_ENTRY_POINTS pEntryPoints)
|
|
{
|
|
drdynvcPlugin* drdynvc;
|
|
DrdynvcClientContext* context;
|
|
CHANNEL_ENTRY_POINTS_FREERDP* pEntryPointsEx;
|
|
|
|
drdynvc = (drdynvcPlugin*) calloc(1, sizeof(drdynvcPlugin));
|
|
|
|
if (!drdynvc)
|
|
return FALSE;
|
|
|
|
drdynvc->channelDef.options =
|
|
CHANNEL_OPTION_INITIALIZED |
|
|
CHANNEL_OPTION_ENCRYPT_RDP |
|
|
CHANNEL_OPTION_COMPRESS_RDP;
|
|
|
|
strcpy(drdynvc->channelDef.name, "drdynvc");
|
|
|
|
drdynvc->state = DRDYNVC_STATE_INITIAL;
|
|
|
|
pEntryPointsEx = (CHANNEL_ENTRY_POINTS_FREERDP*) pEntryPoints;
|
|
|
|
if ((pEntryPointsEx->cbSize >= sizeof(CHANNEL_ENTRY_POINTS_FREERDP)) &&
|
|
(pEntryPointsEx->MagicNumber == FREERDP_CHANNEL_MAGIC_NUMBER))
|
|
{
|
|
context = (DrdynvcClientContext*) calloc(1, sizeof(DrdynvcClientContext));
|
|
|
|
if (!context)
|
|
{
|
|
free(drdynvc);
|
|
return -1;
|
|
}
|
|
|
|
context->handle = (void*) drdynvc;
|
|
context->custom = NULL;
|
|
|
|
drdynvc->context = context;
|
|
|
|
context->GetVersion = drdynvc_get_version;
|
|
|
|
*(pEntryPointsEx->ppInterface) = (void*) context;
|
|
}
|
|
|
|
drdynvc->log = WLog_Get("com.freerdp.channels.drdynvc.client");
|
|
|
|
WLog_Print(drdynvc->log, WLOG_DEBUG, "VirtualChannelEntry");
|
|
|
|
CopyMemory(&(drdynvc->channelEntryPoints), pEntryPoints, sizeof(CHANNEL_ENTRY_POINTS_FREERDP));
|
|
|
|
drdynvc->channelEntryPoints.pVirtualChannelInit(&drdynvc->InitHandle,
|
|
&drdynvc->channelDef, 1, VIRTUAL_CHANNEL_VERSION_WIN2000, drdynvc_virtual_channel_init_event);
|
|
|
|
drdynvc->channelEntryPoints.pInterface = *(drdynvc->channelEntryPoints.ppInterface);
|
|
drdynvc->channelEntryPoints.ppInterface = &(drdynvc->channelEntryPoints.pInterface);
|
|
|
|
drdynvc_add_init_handle_data(drdynvc->InitHandle, (void*) drdynvc);
|
|
|
|
return 1;
|
|
}
|
|
|