299 lines
9.3 KiB
C
299 lines
9.3 KiB
C
/**
|
|
* FreeRDP: A Remote Desktop Protocol Implementation
|
|
* Auto-Detect PDUs
|
|
*
|
|
* Copyright 2014 Dell Software <Mike.McDonald@software.dell.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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
//#define WITH_DEBUG_AUTODETECT
|
|
|
|
#include "autodetect.h"
|
|
|
|
typedef struct
|
|
{
|
|
UINT8 headerLength;
|
|
UINT8 headerTypeId;
|
|
UINT16 sequenceNumber;
|
|
UINT16 requestType;
|
|
} AUTODETECT_REQ_PDU;
|
|
|
|
static BOOL autodetect_send_rtt_measure_response(rdpRdp* rdp, UINT16 sequenceNumber)
|
|
{
|
|
wStream* s;
|
|
|
|
/* Send the response PDU to the server */
|
|
|
|
s = rdp_message_channel_pdu_init(rdp);
|
|
|
|
if (!s)
|
|
return FALSE;
|
|
|
|
WLog_DBG(AUTODETECT_TAG, "sending RTT Measure Response PDU");
|
|
|
|
Stream_Write_UINT8(s, 0x06); /* headerLength (1 byte) */
|
|
Stream_Write_UINT8(s, TYPE_ID_AUTODETECT_RESPONSE); /* headerTypeId (1 byte) */
|
|
Stream_Write_UINT16(s, sequenceNumber); /* sequenceNumber (2 bytes) */
|
|
Stream_Write_UINT16(s, 0x0000); /* responseType (1 byte) */
|
|
|
|
return rdp_send_message_channel_pdu(rdp, s, SEC_AUTODETECT_RSP);
|
|
}
|
|
|
|
static BOOL autodetect_send_bandwidth_measure_results(rdpRdp* rdp, UINT16 responseType, UINT16 sequenceNumber)
|
|
{
|
|
wStream* s;
|
|
UINT32 timeDelta;
|
|
|
|
/* Compute the total time */
|
|
timeDelta = GetTickCount() - rdp->autodetect->bandwidthMeasureStartTime;
|
|
|
|
/* Send the result PDU to the server */
|
|
|
|
s = rdp_message_channel_pdu_init(rdp);
|
|
|
|
if (!s)
|
|
return FALSE;
|
|
|
|
WLog_DBG(AUTODETECT_TAG, "sending Bandwidth Measure Results PDU -> timeDelta=%u, byteCount=%u", timeDelta, rdp->autodetect->bandwidthMeasureByteCount);
|
|
|
|
Stream_Write_UINT8(s, 0x0E); /* headerLength (1 byte) */
|
|
Stream_Write_UINT8(s, TYPE_ID_AUTODETECT_RESPONSE); /* headerTypeId (1 byte) */
|
|
Stream_Write_UINT16(s, sequenceNumber); /* sequenceNumber (2 bytes) */
|
|
Stream_Write_UINT16(s, responseType); /* responseType (1 byte) */
|
|
Stream_Write_UINT32(s, timeDelta); /* timeDelta (4 bytes) */
|
|
Stream_Write_UINT32(s, rdp->autodetect->bandwidthMeasureByteCount); /* byteCount (4 bytes) */
|
|
|
|
return rdp_send_message_channel_pdu(rdp, s, SEC_AUTODETECT_RSP);
|
|
}
|
|
|
|
BOOL autodetect_send_netchar_sync(rdpRdp* rdp, UINT16 sequenceNumber)
|
|
{
|
|
wStream* s;
|
|
|
|
/* Send the response PDU to the server */
|
|
|
|
s = rdp_message_channel_pdu_init(rdp);
|
|
|
|
if (!s)
|
|
return FALSE;
|
|
|
|
WLog_DBG(AUTODETECT_TAG, "sending Network Characteristics Sync PDU -> bandwidth=%u, rtt=%u", rdp->autodetect->netCharBandwidth, rdp->autodetect->netCharAverageRTT);
|
|
|
|
Stream_Write_UINT8(s, 0x0E); /* headerLength (1 byte) */
|
|
Stream_Write_UINT8(s, TYPE_ID_AUTODETECT_RESPONSE); /* headerTypeId (1 byte) */
|
|
Stream_Write_UINT16(s, sequenceNumber); /* sequenceNumber (2 bytes) */
|
|
Stream_Write_UINT16(s, 0x0018); /* responseType (1 byte) */
|
|
Stream_Write_UINT32(s, rdp->autodetect->netCharBandwidth); /* bandwidth (4 bytes) */
|
|
Stream_Write_UINT32(s, rdp->autodetect->netCharAverageRTT); /* rtt (4 bytes) */
|
|
|
|
return rdp_send_message_channel_pdu(rdp, s, SEC_AUTODETECT_RSP);
|
|
}
|
|
|
|
static BOOL autodetect_recv_rtt_measure_request(rdpRdp* rdp, wStream* s, AUTODETECT_REQ_PDU* autodetectReqPdu)
|
|
{
|
|
if (autodetectReqPdu->headerLength != 0x06)
|
|
return FALSE;
|
|
|
|
WLog_DBG(AUTODETECT_TAG, "received RTT Measure Request PDU");
|
|
|
|
/* Send a response to the server */
|
|
return autodetect_send_rtt_measure_response(rdp, autodetectReqPdu->sequenceNumber);
|
|
}
|
|
|
|
static BOOL autodetect_recv_bandwidth_measure_start(rdpRdp* rdp, wStream* s, AUTODETECT_REQ_PDU* autodetectReqPdu)
|
|
{
|
|
if (autodetectReqPdu->headerLength != 0x06)
|
|
return FALSE;
|
|
|
|
WLog_DBG(AUTODETECT_TAG, "received Bandwidth Measure Start PDU - time=%lu", GetTickCount());
|
|
|
|
/* Initialize bandwidth measurement parameters */
|
|
rdp->autodetect->bandwidthMeasureStartTime = GetTickCount();
|
|
rdp->autodetect->bandwidthMeasureByteCount = 0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static BOOL autodetect_recv_bandwidth_measure_payload(rdpRdp* rdp, wStream* s, AUTODETECT_REQ_PDU* autodetectReqPdu)
|
|
{
|
|
UINT16 payloadLength;
|
|
|
|
if (autodetectReqPdu->headerLength != 0x08)
|
|
return FALSE;
|
|
|
|
if (Stream_GetRemainingLength(s) < 2)
|
|
return FALSE;
|
|
|
|
Stream_Read_UINT16(s, payloadLength); /* payloadLength (2 bytes) */
|
|
|
|
WLog_DBG(AUTODETECT_TAG, "received Bandwidth Measure Payload PDU -> payloadLength=%u", payloadLength);
|
|
|
|
/* Add the payload length to the bandwidth measurement parameters */
|
|
rdp->autodetect->bandwidthMeasureByteCount += payloadLength;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static BOOL autodetect_recv_bandwidth_measure_stop(rdpRdp* rdp, wStream* s, AUTODETECT_REQ_PDU* autodetectReqPdu)
|
|
{
|
|
UINT16 payloadLength;
|
|
UINT16 responseType;
|
|
|
|
if (autodetectReqPdu->requestType == 0x002B)
|
|
{
|
|
if (autodetectReqPdu->headerLength != 0x08)
|
|
return FALSE;
|
|
|
|
if (Stream_GetRemainingLength(s) < 2)
|
|
return FALSE;
|
|
|
|
Stream_Read_UINT16(s, payloadLength); /* payloadLength (2 bytes) */
|
|
}
|
|
else
|
|
{
|
|
if (autodetectReqPdu->headerLength != 0x06)
|
|
return FALSE;
|
|
|
|
payloadLength = 0;
|
|
}
|
|
|
|
WLog_DBG(AUTODETECT_TAG, "received Bandwidth Measure Stop PDU -> payloadLength=%u", payloadLength);
|
|
|
|
/* Add the payload length to the bandwidth measurement parameters */
|
|
rdp->autodetect->bandwidthMeasureByteCount += payloadLength;
|
|
|
|
/* Send a response the server */
|
|
responseType = autodetectReqPdu->requestType == 0x002B ? 0x0003 : 0x000B;
|
|
|
|
return autodetect_send_bandwidth_measure_results(rdp, responseType, autodetectReqPdu->sequenceNumber);
|
|
}
|
|
|
|
static BOOL autodetect_recv_netchar_result(rdpRdp* rdp, wStream* s, AUTODETECT_REQ_PDU* autodetectReqPdu)
|
|
{
|
|
switch (autodetectReqPdu->requestType)
|
|
{
|
|
case 0x0840:
|
|
/* baseRTT and averageRTT fields are present (bandwidth field is not) */
|
|
if ((autodetectReqPdu->headerLength != 0x0E) || (Stream_GetRemainingLength(s) < 8))
|
|
return FALSE;
|
|
Stream_Read_UINT32(s, rdp->autodetect->netCharBaseRTT); /* baseRTT (4 bytes) */
|
|
Stream_Read_UINT32(s, rdp->autodetect->netCharAverageRTT); /* averageRTT (4 bytes) */
|
|
break;
|
|
|
|
case 0x0880:
|
|
/* bandwidth and averageRTT fields are present (baseRTT field is not) */
|
|
if ((autodetectReqPdu->headerLength != 0x0E) || (Stream_GetRemainingLength(s) < 8))
|
|
return FALSE;
|
|
Stream_Read_UINT32(s, rdp->autodetect->netCharBandwidth); /* bandwidth (4 bytes) */
|
|
Stream_Read_UINT32(s, rdp->autodetect->netCharAverageRTT); /* averageRTT (4 bytes) */
|
|
break;
|
|
|
|
case 0x08C0:
|
|
/* baseRTT, bandwidth, and averageRTT fields are present */
|
|
if ((autodetectReqPdu->headerLength != 0x12) || (Stream_GetRemainingLength(s) < 12))
|
|
return FALSE;
|
|
Stream_Read_UINT32(s, rdp->autodetect->netCharBaseRTT); /* baseRTT (4 bytes) */
|
|
Stream_Read_UINT32(s, rdp->autodetect->netCharBandwidth); /* bandwidth (4 bytes) */
|
|
Stream_Read_UINT32(s, rdp->autodetect->netCharAverageRTT); /* averageRTT (4 bytes) */
|
|
break;
|
|
}
|
|
|
|
WLog_DBG(AUTODETECT_TAG, "received Network Characteristics Result PDU -> baseRTT=%u, bandwidth=%u, averageRTT=%u", rdp->autodetect->netCharBaseRTT, rdp->autodetect->netCharBandwidth, rdp->autodetect->netCharAverageRTT);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
int rdp_recv_autodetect_packet(rdpRdp* rdp, wStream* s)
|
|
{
|
|
AUTODETECT_REQ_PDU autodetectReqPdu;
|
|
BOOL success = FALSE;
|
|
|
|
if (Stream_GetRemainingLength(s) < 6)
|
|
return -1;
|
|
|
|
Stream_Read_UINT8(s, autodetectReqPdu.headerLength); /* headerLength (1 byte) */
|
|
Stream_Read_UINT8(s, autodetectReqPdu.headerTypeId); /* headerTypeId (1 byte) */
|
|
Stream_Read_UINT16(s, autodetectReqPdu.sequenceNumber); /* sequenceNumber (2 bytes) */
|
|
Stream_Read_UINT16(s, autodetectReqPdu.requestType); /* requestType (2 bytes) */
|
|
|
|
WLog_DBG(AUTODETECT_TAG,
|
|
"rdp_recv_autodetect_packet: headerLength=%u, headerTypeId=%u, sequenceNumber=%u, requestType=%04x",
|
|
autodetectReqPdu.headerLength, autodetectReqPdu.headerTypeId,
|
|
autodetectReqPdu.sequenceNumber, autodetectReqPdu.requestType);
|
|
|
|
if (autodetectReqPdu.headerTypeId != TYPE_ID_AUTODETECT_REQUEST)
|
|
return -1;
|
|
|
|
switch (autodetectReqPdu.requestType)
|
|
{
|
|
case 0x0001:
|
|
case 0x1001:
|
|
/* RTT Measure Request (RDP_RTT_REQUEST) - MS-RDPBCGR 2.2.14.1.1 */
|
|
success = autodetect_recv_rtt_measure_request(rdp, s, &autodetectReqPdu);
|
|
break;
|
|
|
|
case 0x0014:
|
|
case 0x0114:
|
|
case 0x1014:
|
|
/* Bandwidth Measure Start (RDP_BW_START) - MS-RDPBCGR 2.2.14.1.2 */
|
|
success = autodetect_recv_bandwidth_measure_start(rdp, s, &autodetectReqPdu);
|
|
break;
|
|
|
|
case 0x0002:
|
|
/* Bandwidth Measure Payload (RDP_BW_PAYLOAD) - MS-RDPBCGR 2.2.14.1.3 */
|
|
success = autodetect_recv_bandwidth_measure_payload(rdp, s, &autodetectReqPdu);
|
|
break;
|
|
|
|
case 0x002B:
|
|
case 0x0429:
|
|
case 0x0629:
|
|
/* Bandwidth Measure Stop (RDP_BW_STOP) - MS-RDPBCGR 2.2.14.1.4 */
|
|
success = autodetect_recv_bandwidth_measure_stop(rdp, s, &autodetectReqPdu);
|
|
break;
|
|
|
|
case 0x0840:
|
|
case 0x0880:
|
|
case 0x08C0:
|
|
/* Network Characteristics Result (RDP_NETCHAR_RESULT) - MS-RDPBCGR 2.2.14.1.5 */
|
|
success = autodetect_recv_netchar_result(rdp, s, &autodetectReqPdu);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return success ? 0 : -1;
|
|
}
|
|
|
|
rdpAutoDetect* autodetect_new(void)
|
|
{
|
|
rdpAutoDetect* autoDetect = (rdpAutoDetect*) calloc(1, sizeof(rdpAutoDetect));
|
|
|
|
if (autoDetect)
|
|
{
|
|
|
|
}
|
|
|
|
return autoDetect;
|
|
}
|
|
|
|
void autodetect_free(rdpAutoDetect* autoDetect)
|
|
{
|
|
free(autoDetect);
|
|
}
|