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freerdp/libfreerdp/core/autodetect.c

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/**
* 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
#include <winpr/crypto.h>
#include "autodetect.h"
#define RDP_RTT_REQUEST_TYPE_CONTINUOUS 0x0001
#define RDP_RTT_REQUEST_TYPE_CONNECTTIME 0x1001
#define RDP_RTT_RESPONSE_TYPE 0x0000
#define RDP_BW_START_REQUEST_TYPE_CONTINUOUS 0x0014
#define RDP_BW_START_REQUEST_TYPE_TUNNEL 0x0114
#define RDP_BW_START_REQUEST_TYPE_CONNECTTIME 0x1014
#define RDP_BW_PAYLOAD_REQUEST_TYPE 0x0002
#define RDP_BW_STOP_REQUEST_TYPE_CONNECTTIME 0x002B
#define RDP_BW_STOP_REQUEST_TYPE_CONTINUOUS 0x0429
#define RDP_BW_STOP_REQUEST_TYPE_TUNNEL 0x0629
#define RDP_BW_RESULTS_RESPONSE_TYPE_CONNECTTIME 0x0003
#define RDP_BW_RESULTS_RESPONSE_TYPE_CONTINUOUS 0x000B
#define RDP_NETCHAR_SYNC_RESPONSE_TYPE 0x0018
#define RDP_NETCHAR_RESULTS_0x0840 0x0840U
#define RDP_NETCHAR_RESULTS_0x0880 0x0880U
#define RDP_NETCHAR_RESULTS_0x08C0 0x08C0U
typedef struct
{
UINT8 headerLength;
UINT8 headerTypeId;
UINT16 sequenceNumber;
UINT16 requestType;
} AUTODETECT_REQ_PDU;
typedef struct
{
UINT8 headerLength;
UINT8 headerTypeId;
UINT16 sequenceNumber;
UINT16 responseType;
} AUTODETECT_RSP_PDU;
static const char* autodetect_request_type_to_string(UINT32 requestType)
{
switch (requestType)
{
case RDP_RTT_RESPONSE_TYPE:
return "RDP_RTT_RESPONSE_TYPE";
case RDP_BW_RESULTS_RESPONSE_TYPE_CONNECTTIME:
return "RDP_BW_RESULTS_RESPONSE_TYPE_CONNECTTIME";
case RDP_BW_RESULTS_RESPONSE_TYPE_CONTINUOUS:
return "RDP_BW_RESULTS_RESPONSE_TYPE_CONTINUOUS";
case RDP_RTT_REQUEST_TYPE_CONTINUOUS:
return "RDP_RTT_REQUEST_TYPE_CONTINUOUS";
case RDP_RTT_REQUEST_TYPE_CONNECTTIME:
return "RDP_RTT_REQUEST_TYPE_CONNECTTIME";
case RDP_BW_START_REQUEST_TYPE_CONTINUOUS:
return "RDP_BW_START_REQUEST_TYPE_CONTINUOUS";
case RDP_BW_START_REQUEST_TYPE_TUNNEL:
return "RDP_BW_START_REQUEST_TYPE_TUNNEL";
case RDP_BW_START_REQUEST_TYPE_CONNECTTIME:
return "RDP_BW_START_REQUEST_TYPE_CONNECTTIME";
case RDP_BW_PAYLOAD_REQUEST_TYPE:
return "RDP_BW_PAYLOAD_REQUEST_TYPE";
case RDP_BW_STOP_REQUEST_TYPE_CONNECTTIME:
return "RDP_BW_STOP_REQUEST_TYPE_CONNECTTIME";
case RDP_BW_STOP_REQUEST_TYPE_CONTINUOUS:
return "RDP_BW_STOP_REQUEST_TYPE_CONTINUOUS";
case RDP_BW_STOP_REQUEST_TYPE_TUNNEL:
return "RDP_BW_STOP_REQUEST_TYPE_TUNNEL";
case RDP_NETCHAR_RESULTS_0x0840:
return "RDP_NETCHAR_RESULTS_0x0840";
case RDP_NETCHAR_RESULTS_0x0880:
return "RDP_NETCHAR_RESULTS_0x0880";
case RDP_NETCHAR_RESULTS_0x08C0:
return "RDP_NETCHAR_RESULTS_0x08C0";
default:
return "UNKNOWN";
}
}
static BOOL autodetect_send_rtt_measure_request(rdpContext* context, UINT16 sequenceNumber,
UINT16 requestType)
{
wStream* s;
s = rdp_message_channel_pdu_init(context->rdp);
if (!s)
return FALSE;
WLog_VRB(AUTODETECT_TAG, "sending RTT Measure Request PDU");
Stream_Write_UINT8(s, 0x06); /* headerLength (1 byte) */
Stream_Write_UINT8(s, TYPE_ID_AUTODETECT_REQUEST); /* headerTypeId (1 byte) */
Stream_Write_UINT16(s, sequenceNumber); /* sequenceNumber (2 bytes) */
Stream_Write_UINT16(s, requestType); /* requestType (2 bytes) */
context->rdp->autodetect->rttMeasureStartTime = GetTickCount64();
return rdp_send_message_channel_pdu(context->rdp, s, SEC_AUTODETECT_REQ);
}
static BOOL autodetect_send_continuous_rtt_measure_request(rdpContext* context,
UINT16 sequenceNumber)
{
return autodetect_send_rtt_measure_request(context, sequenceNumber,
RDP_RTT_REQUEST_TYPE_CONTINUOUS);
}
BOOL autodetect_send_connecttime_rtt_measure_request(rdpContext* context, UINT16 sequenceNumber)
{
return autodetect_send_rtt_measure_request(context, sequenceNumber,
RDP_RTT_REQUEST_TYPE_CONNECTTIME);
}
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_VRB(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, RDP_RTT_RESPONSE_TYPE); /* responseType (1 byte) */
return rdp_send_message_channel_pdu(rdp, s, SEC_AUTODETECT_RSP);
}
static BOOL autodetect_send_bandwidth_measure_start(rdpContext* context, UINT16 sequenceNumber,
UINT16 requestType)
{
wStream* s;
s = rdp_message_channel_pdu_init(context->rdp);
if (!s)
return FALSE;
WLog_VRB(AUTODETECT_TAG, "sending Bandwidth Measure Start PDU");
Stream_Write_UINT8(s, 0x06); /* headerLength (1 byte) */
Stream_Write_UINT8(s, TYPE_ID_AUTODETECT_REQUEST); /* headerTypeId (1 byte) */
Stream_Write_UINT16(s, sequenceNumber); /* sequenceNumber (2 bytes) */
Stream_Write_UINT16(s, requestType); /* requestType (2 bytes) */
return rdp_send_message_channel_pdu(context->rdp, s, SEC_AUTODETECT_REQ);
}
static BOOL autodetect_send_continuous_bandwidth_measure_start(rdpContext* context,
UINT16 sequenceNumber)
{
return autodetect_send_bandwidth_measure_start(context, sequenceNumber,
RDP_BW_START_REQUEST_TYPE_CONTINUOUS);
}
BOOL autodetect_send_connecttime_bandwidth_measure_start(rdpContext* context, UINT16 sequenceNumber)
{
return autodetect_send_bandwidth_measure_start(context, sequenceNumber,
RDP_BW_START_REQUEST_TYPE_CONNECTTIME);
}
BOOL autodetect_send_bandwidth_measure_payload(rdpContext* context, UINT16 payloadLength,
UINT16 sequenceNumber)
{
wStream* s;
UCHAR* buffer = NULL;
BOOL bResult = FALSE;
s = rdp_message_channel_pdu_init(context->rdp);
if (!s)
return FALSE;
WLog_VRB(AUTODETECT_TAG, "sending Bandwidth Measure Payload PDU -> payloadLength=%" PRIu16 "",
payloadLength);
/* 4-bytes aligned */
payloadLength &= ~3;
if (!Stream_EnsureRemainingCapacity(s, 8 + payloadLength))
{
Stream_Release(s);
return FALSE;
}
Stream_Write_UINT8(s, 0x08); /* headerLength (1 byte) */
Stream_Write_UINT8(s, TYPE_ID_AUTODETECT_REQUEST); /* headerTypeId (1 byte) */
Stream_Write_UINT16(s, sequenceNumber); /* sequenceNumber (2 bytes) */
Stream_Write_UINT16(s, RDP_BW_PAYLOAD_REQUEST_TYPE); /* requestType (2 bytes) */
Stream_Write_UINT16(s, payloadLength); /* payloadLength (2 bytes) */
/* Random data (better measurement in case the line is compressed) */
buffer = (UCHAR*)malloc(payloadLength);
if (NULL == buffer)
{
Stream_Release(s);
return FALSE;
}
winpr_RAND(buffer, payloadLength);
Stream_Write(s, buffer, payloadLength);
bResult = rdp_send_message_channel_pdu(context->rdp, s, SEC_AUTODETECT_REQ);
free(buffer);
return bResult;
}
static BOOL autodetect_send_bandwidth_measure_stop(rdpContext* context, UINT16 payloadLength,
UINT16 sequenceNumber, UINT16 requestType)
{
wStream* s;
UCHAR* buffer = NULL;
BOOL bResult = FALSE;
s = rdp_message_channel_pdu_init(context->rdp);
if (!s)
return FALSE;
WLog_VRB(AUTODETECT_TAG, "sending Bandwidth Measure Stop PDU -> payloadLength=%" PRIu16 "",
payloadLength);
/* 4-bytes aligned */
payloadLength &= ~3;
Stream_Write_UINT8(s, requestType == RDP_BW_STOP_REQUEST_TYPE_CONNECTTIME
? 0x08
: 0x06); /* headerLength (1 byte) */
Stream_Write_UINT8(s, TYPE_ID_AUTODETECT_REQUEST); /* headerTypeId (1 byte) */
Stream_Write_UINT16(s, sequenceNumber); /* sequenceNumber (2 bytes) */
Stream_Write_UINT16(s, requestType); /* requestType (2 bytes) */
if (requestType == RDP_BW_STOP_REQUEST_TYPE_CONNECTTIME)
{
Stream_Write_UINT16(s, payloadLength); /* payloadLength (2 bytes) */
if (payloadLength > 0)
{
if (!Stream_EnsureRemainingCapacity(s, payloadLength))
{
Stream_Release(s);
return FALSE;
}
/* Random data (better measurement in case the line is compressed) */
buffer = malloc(payloadLength);
if (NULL == buffer)
{
Stream_Release(s);
return FALSE;
}
winpr_RAND(buffer, payloadLength);
Stream_Write(s, buffer, payloadLength);
}
}
bResult = rdp_send_message_channel_pdu(context->rdp, s, SEC_AUTODETECT_REQ);
free(buffer);
return bResult;
}
static BOOL autodetect_send_continuous_bandwidth_measure_stop(rdpContext* context,
UINT16 sequenceNumber)
{
return autodetect_send_bandwidth_measure_stop(context, 0, sequenceNumber,
RDP_BW_STOP_REQUEST_TYPE_CONTINUOUS);
}
BOOL autodetect_send_connecttime_bandwidth_measure_stop(rdpContext* context, UINT16 payloadLength,
UINT16 sequenceNumber)
{
return autodetect_send_bandwidth_measure_stop(context, payloadLength, sequenceNumber,
RDP_BW_STOP_REQUEST_TYPE_CONNECTTIME);
}
static BOOL autodetect_send_bandwidth_measure_results(rdpRdp* rdp, UINT16 responseType,
UINT16 sequenceNumber)
{
BOOL success = TRUE;
wStream* s;
UINT64 timeDelta;
/* Compute the total time */
timeDelta = GetTickCount64() - rdp->autodetect->bandwidthMeasureStartTime;
/* Send the result PDU to the server */
s = rdp_message_channel_pdu_init(rdp);
if (!s)
return FALSE;
WLog_VRB(AUTODETECT_TAG,
"sending Bandwidth Measure Results PDU -> timeDelta=%" PRIu32 ", byteCount=%" PRIu32
"",
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) */
IFCALLRET(rdp->autodetect->ClientBandwidthMeasureResult, success, rdp->context,
rdp->autodetect);
if (!success)
return FALSE;
return rdp_send_message_channel_pdu(rdp, s, SEC_AUTODETECT_RSP);
}
static BOOL autodetect_send_netchar_result(rdpContext* context, UINT16 sequenceNumber)
{
wStream* s;
s = rdp_message_channel_pdu_init(context->rdp);
if (!s)
return FALSE;
WLog_VRB(AUTODETECT_TAG, "sending Bandwidth Network Characteristics Result PDU");
if (context->rdp->autodetect->netCharBandwidth > 0)
{
Stream_Write_UINT8(s, 0x12); /* headerLength (1 byte) */
Stream_Write_UINT8(s, TYPE_ID_AUTODETECT_REQUEST); /* headerTypeId (1 byte) */
Stream_Write_UINT16(s, sequenceNumber); /* sequenceNumber (2 bytes) */
Stream_Write_UINT16(s, RDP_NETCHAR_RESULTS_0x08C0); /* requestType (2 bytes) */
Stream_Write_UINT32(s, context->rdp->autodetect->netCharBaseRTT); /* baseRTT (4 bytes) */
Stream_Write_UINT32(s,
context->rdp->autodetect->netCharBandwidth); /* bandwidth (4 bytes) */
Stream_Write_UINT32(s,
context->rdp->autodetect->netCharAverageRTT); /* averageRTT (4 bytes) */
}
else
{
Stream_Write_UINT8(s, 0x0E); /* headerLength (1 byte) */
Stream_Write_UINT8(s, TYPE_ID_AUTODETECT_REQUEST); /* headerTypeId (1 byte) */
Stream_Write_UINT16(s, sequenceNumber); /* sequenceNumber (2 bytes) */
Stream_Write_UINT16(s, RDP_NETCHAR_RESULTS_0x0840); /* requestType (2 bytes) */
Stream_Write_UINT32(s, context->rdp->autodetect->netCharBaseRTT); /* baseRTT (4 bytes) */
Stream_Write_UINT32(s,
context->rdp->autodetect->netCharAverageRTT); /* averageRTT (4 bytes) */
}
return rdp_send_message_channel_pdu(context->rdp, s, SEC_AUTODETECT_REQ);
}
static 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_VRB(AUTODETECT_TAG,
"sending Network Characteristics Sync PDU -> bandwidth=%" PRIu32 ", rtt=%" PRIu32 "",
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, RDP_NETCHAR_SYNC_RESPONSE_TYPE); /* 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_VRB(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_rtt_measure_response(rdpRdp* rdp, wStream* s,
AUTODETECT_RSP_PDU* autodetectRspPdu)
{
BOOL success = TRUE;
if (autodetectRspPdu->headerLength != 0x06)
return FALSE;
WLog_VRB(AUTODETECT_TAG, "received RTT Measure Response PDU");
rdp->autodetect->netCharAverageRTT = GetTickCount64() - rdp->autodetect->rttMeasureStartTime;
if (rdp->autodetect->netCharBaseRTT == 0 ||
rdp->autodetect->netCharBaseRTT > rdp->autodetect->netCharAverageRTT)
rdp->autodetect->netCharBaseRTT = rdp->autodetect->netCharAverageRTT;
IFCALLRET(rdp->autodetect->RTTMeasureResponse, success, rdp->context,
autodetectRspPdu->sequenceNumber);
return success;
}
static BOOL autodetect_recv_bandwidth_measure_start(rdpRdp* rdp, wStream* s,
AUTODETECT_REQ_PDU* autodetectReqPdu)
{
if (autodetectReqPdu->headerLength != 0x06)
return FALSE;
WLog_VRB(AUTODETECT_TAG, "received Bandwidth Measure Start PDU - time=%" PRIu64 "",
GetTickCount64());
/* Initialize bandwidth measurement parameters */
rdp->autodetect->bandwidthMeasureStartTime = GetTickCount64();
rdp->autodetect->bandwidthMeasureByteCount = 0;
/* Continuous Auto-Detection: mark the start of the measurement */
if (autodetectReqPdu->requestType == RDP_BW_START_REQUEST_TYPE_CONTINUOUS)
{
rdp->autodetect->bandwidthMeasureStarted = TRUE;
}
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) */
if (!Stream_SafeSeek(s, payloadLength))
return FALSE;
WLog_DBG(AUTODETECT_TAG, "received Bandwidth Measure Payload PDU -> payloadLength=%" PRIu16 "",
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 == RDP_BW_STOP_REQUEST_TYPE_CONNECTTIME)
{
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;
}
if (!Stream_SafeSeek(s, payloadLength))
return FALSE;
WLog_VRB(AUTODETECT_TAG, "received Bandwidth Measure Stop PDU -> payloadLength=%" PRIu16 "",
payloadLength);
/* Add the payload length to the bandwidth measurement parameters */
rdp->autodetect->bandwidthMeasureByteCount += payloadLength;
/* Continuous Auto-Detection: mark the stop of the measurement */
if (autodetectReqPdu->requestType == RDP_BW_STOP_REQUEST_TYPE_CONTINUOUS)
{
rdp->autodetect->bandwidthMeasureStarted = FALSE;
}
/* Send a response the server */
responseType = autodetectReqPdu->requestType == RDP_BW_STOP_REQUEST_TYPE_CONNECTTIME
? RDP_BW_RESULTS_RESPONSE_TYPE_CONNECTTIME
: RDP_BW_RESULTS_RESPONSE_TYPE_CONTINUOUS;
return autodetect_send_bandwidth_measure_results(rdp, responseType,
autodetectReqPdu->sequenceNumber);
}
static BOOL autodetect_recv_bandwidth_measure_results(rdpRdp* rdp, wStream* s,
AUTODETECT_RSP_PDU* autodetectRspPdu)
{
BOOL success = TRUE;
if (autodetectRspPdu->headerLength != 0x0E)
return FALSE;
WLog_VRB(AUTODETECT_TAG, "received Bandwidth Measure Results PDU");
if (Stream_GetRemainingLength(s) < 8)
return -1;
Stream_Read_UINT32(s, rdp->autodetect->bandwidthMeasureTimeDelta); /* timeDelta (4 bytes) */
Stream_Read_UINT32(s, rdp->autodetect->bandwidthMeasureByteCount); /* byteCount (4 bytes) */
if (rdp->autodetect->bandwidthMeasureTimeDelta > 0)
rdp->autodetect->netCharBandwidth = rdp->autodetect->bandwidthMeasureByteCount * 8 /
rdp->autodetect->bandwidthMeasureTimeDelta;
else
rdp->autodetect->netCharBandwidth = 0;
IFCALLRET(rdp->autodetect->BandwidthMeasureResults, success, rdp->context,
autodetectRspPdu->sequenceNumber);
return success;
}
static BOOL autodetect_recv_netchar_result(rdpRdp* rdp, wStream* s,
AUTODETECT_REQ_PDU* autodetectReqPdu)
{
BOOL success = TRUE;
switch (autodetectReqPdu->requestType)
{
case RDP_NETCHAR_RESULTS_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 RDP_NETCHAR_RESULTS_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 RDP_NETCHAR_RESULTS_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_VRB(AUTODETECT_TAG,
"received Network Characteristics Result PDU -> baseRTT=%" PRIu32
", bandwidth=%" PRIu32 ", averageRTT=%" PRIu32 "",
rdp->autodetect->netCharBaseRTT, rdp->autodetect->netCharBandwidth,
rdp->autodetect->netCharAverageRTT);
IFCALLRET(rdp->autodetect->NetworkCharacteristicsResult, success, rdp->context,
autodetectReqPdu->sequenceNumber);
return success;
}
int rdp_recv_autodetect_request_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_VRB(AUTODETECT_TAG,
"rdp_recv_autodetect_request_packet: headerLength=%" PRIu8 ", headerTypeId=%" PRIu8
", sequenceNumber=%" PRIu16 ", requestType=%04" PRIx16 "",
autodetectReqPdu.headerLength, autodetectReqPdu.headerTypeId,
autodetectReqPdu.sequenceNumber, autodetectReqPdu.requestType);
if (!rdp->settings->NetworkAutoDetect)
{
WLog_WARN(AUTODETECT_TAG,
"Received a [MS-RDPBCGR] 2.2.14.1.1 RTT Measure Request (RDP_RTT_REQUEST) [%s] "
"message but support was not enabled",
autodetect_request_type_to_string(autodetectReqPdu.requestType));
}
if (autodetectReqPdu.headerTypeId != TYPE_ID_AUTODETECT_REQUEST)
{
WLog_ERR(AUTODETECT_TAG,
"Received a [MS-RDPBCGR] 2.2.14.1.1 RTT Measure Request (RDP_RTT_REQUEST) [%s] "
"message with invalid headerTypeId=0x%04" PRIx16,
autodetect_request_type_to_string(autodetectReqPdu.requestType),
autodetectReqPdu.headerTypeId);
return -1;
}
switch (autodetectReqPdu.requestType)
{
case RDP_RTT_REQUEST_TYPE_CONTINUOUS:
case RDP_RTT_REQUEST_TYPE_CONNECTTIME:
/* RTT Measure Request (RDP_RTT_REQUEST) - MS-RDPBCGR 2.2.14.1.1 */
success = autodetect_recv_rtt_measure_request(rdp, s, &autodetectReqPdu);
break;
case RDP_BW_START_REQUEST_TYPE_CONTINUOUS:
case RDP_BW_START_REQUEST_TYPE_TUNNEL:
case RDP_BW_START_REQUEST_TYPE_CONNECTTIME:
/* Bandwidth Measure Start (RDP_BW_START) - MS-RDPBCGR 2.2.14.1.2 */
success = autodetect_recv_bandwidth_measure_start(rdp, s, &autodetectReqPdu);
break;
case RDP_BW_PAYLOAD_REQUEST_TYPE:
/* Bandwidth Measure Payload (RDP_BW_PAYLOAD) - MS-RDPBCGR 2.2.14.1.3 */
success = autodetect_recv_bandwidth_measure_payload(rdp, s, &autodetectReqPdu);
break;
case RDP_BW_STOP_REQUEST_TYPE_CONNECTTIME:
case RDP_BW_STOP_REQUEST_TYPE_CONTINUOUS:
case RDP_BW_STOP_REQUEST_TYPE_TUNNEL:
/* Bandwidth Measure Stop (RDP_BW_STOP) - MS-RDPBCGR 2.2.14.1.4 */
success = autodetect_recv_bandwidth_measure_stop(rdp, s, &autodetectReqPdu);
break;
case RDP_NETCHAR_RESULTS_0x0840:
case RDP_NETCHAR_RESULTS_0x0880:
case RDP_NETCHAR_RESULTS_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;
}
int rdp_recv_autodetect_response_packet(rdpRdp* rdp, wStream* s)
{
AUTODETECT_RSP_PDU autodetectRspPdu;
BOOL success = FALSE;
if (Stream_GetRemainingLength(s) < 6)
return -1;
Stream_Read_UINT8(s, autodetectRspPdu.headerLength); /* headerLength (1 byte) */
Stream_Read_UINT8(s, autodetectRspPdu.headerTypeId); /* headerTypeId (1 byte) */
Stream_Read_UINT16(s, autodetectRspPdu.sequenceNumber); /* sequenceNumber (2 bytes) */
Stream_Read_UINT16(s, autodetectRspPdu.responseType); /* responseType (2 bytes) */
WLog_VRB(AUTODETECT_TAG,
"rdp_recv_autodetect_response_packet: headerLength=%" PRIu8 ", headerTypeId=%" PRIu8
", sequenceNumber=%" PRIu16 ", requestType=%04" PRIx16 "",
autodetectRspPdu.headerLength, autodetectRspPdu.headerTypeId,
autodetectRspPdu.sequenceNumber, autodetectRspPdu.responseType);
if (!rdp->settings->NetworkAutoDetect)
{
WLog_WARN(AUTODETECT_TAG,
"Received a [MS-RDPBCGR] 2.2.14.2.1 RTT Measure Response (RDP_RTT_RESPONSE) [%s] "
"message but support was not enabled",
autodetect_request_type_to_string(autodetectRspPdu.responseType));
}
if (autodetectRspPdu.headerTypeId != TYPE_ID_AUTODETECT_RESPONSE)
{
WLog_ERR(AUTODETECT_TAG,
"Received a [MS-RDPBCGR] 2.2.14.2.1 RTT Measure Response (RDP_RTT_RESPONSE) [%s] "
"message with invalid headerTypeId=0x%04" PRIx16,
autodetect_request_type_to_string(autodetectRspPdu.responseType),
autodetectRspPdu.headerTypeId);
return -1;
}
switch (autodetectRspPdu.responseType)
{
case RDP_RTT_RESPONSE_TYPE:
/* RTT Measure Response (RDP_RTT_RESPONSE) - MS-RDPBCGR 2.2.14.2.1 */
success = autodetect_recv_rtt_measure_response(rdp, s, &autodetectRspPdu);
break;
case RDP_BW_RESULTS_RESPONSE_TYPE_CONNECTTIME:
case RDP_BW_RESULTS_RESPONSE_TYPE_CONTINUOUS:
/* Bandwidth Measure Results (RDP_BW_RESULTS) - MS-RDPBCGR 2.2.14.2.2 */
success = autodetect_recv_bandwidth_measure_results(rdp, s, &autodetectRspPdu);
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);
}
void autodetect_register_server_callbacks(rdpAutoDetect* autodetect)
{
autodetect->RTTMeasureRequest = autodetect_send_continuous_rtt_measure_request;
autodetect->BandwidthMeasureStart = autodetect_send_continuous_bandwidth_measure_start;
autodetect->BandwidthMeasureStop = autodetect_send_continuous_bandwidth_measure_stop;
autodetect->NetworkCharacteristicsResult = autodetect_send_netchar_result;
}
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