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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.
*/
#include <freerdp/config.h>
#include <winpr/crypto.h>
#include <winpr/assert.h>
#include "autodetect.h"
#define TYPE_ID_AUTODETECT_REQUEST 0x00
#define TYPE_ID_AUTODETECT_RESPONSE 0x01
#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_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_header_type_string(UINT8 headerType, char* buffer, size_t size)
{
const char* str = NULL;
switch (headerType)
{
case TYPE_ID_AUTODETECT_REQUEST:
str = "TYPE_ID_AUTODETECT_REQUEST";
break;
case TYPE_ID_AUTODETECT_RESPONSE:
str = "TYPE_ID_AUTODETECT_RESPONSE";
break;
default:
str = "TYPE_ID_AUTODETECT_UNKNOWN";
break;
}
(void)_snprintf(buffer, size, "%s [0x%08" PRIx8 "]", str, headerType);
return buffer;
}
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 const char* autodetect_request_type_to_string_buffer(UINT32 requestType, char* buffer,
size_t size)
{
const char* str = autodetect_request_type_to_string(requestType);
(void)_snprintf(buffer, size, "%s [0x%08" PRIx32 "]", str, requestType);
return buffer;
}
static BOOL autodetect_send_rtt_measure_request(rdpAutoDetect* autodetect,
RDP_TRANSPORT_TYPE transport, UINT16 sequenceNumber)
{
UINT16 requestType = 0;
wStream* s = NULL;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->context);
s = rdp_message_channel_pdu_init(autodetect->context->rdp);
if (!s)
return FALSE;
if (freerdp_get_state(autodetect->context) < CONNECTION_STATE_ACTIVE)
requestType = RDP_RTT_REQUEST_TYPE_CONNECTTIME;
else
requestType = RDP_RTT_REQUEST_TYPE_CONTINUOUS;
WLog_Print(autodetect->log, WLOG_TRACE, "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) */
autodetect->rttMeasureStartTime = GetTickCount64();
return rdp_send_message_channel_pdu(autodetect->context->rdp, s, SEC_AUTODETECT_REQ);
}
static BOOL autodetect_send_rtt_measure_response(rdpAutoDetect* autodetect, UINT16 sequenceNumber)
{
wStream* s = NULL;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->context);
/* Send the response PDU to the server */
s = rdp_message_channel_pdu_init(autodetect->context->rdp);
if (!s)
return FALSE;
WLog_Print(autodetect->log, WLOG_TRACE,
"sending RTT Measure Response PDU (seqNumber=0x%" PRIx16 ")", sequenceNumber);
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(autodetect->context->rdp, s, SEC_AUTODETECT_RSP);
}
static BOOL autodetect_send_bandwidth_measure_start(rdpAutoDetect* autodetect,
RDP_TRANSPORT_TYPE transport,
UINT16 sequenceNumber)
{
UINT16 requestType = 0;
wStream* s = NULL;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->context);
s = rdp_message_channel_pdu_init(autodetect->context->rdp);
if (!s)
return FALSE;
if (freerdp_get_state(autodetect->context) < CONNECTION_STATE_ACTIVE)
requestType = RDP_BW_START_REQUEST_TYPE_CONNECTTIME;
else
requestType = RDP_BW_START_REQUEST_TYPE_CONTINUOUS;
WLog_Print(autodetect->log, WLOG_TRACE,
"sending Bandwidth Measure Start PDU(seqNumber=%" PRIu16 ")", sequenceNumber);
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(autodetect->context->rdp, s, SEC_AUTODETECT_REQ);
}
static BOOL autodetect_send_bandwidth_measure_payload(rdpAutoDetect* autodetect,
RDP_TRANSPORT_TYPE transport,
UINT16 sequenceNumber, UINT16 payloadLength)
{
wStream* s = NULL;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->context);
WINPR_ASSERT(freerdp_get_state(autodetect->context) < CONNECTION_STATE_ACTIVE);
s = rdp_message_channel_pdu_init(autodetect->context->rdp);
if (!s)
return FALSE;
WLog_Print(autodetect->log, WLOG_TRACE,
"sending Bandwidth Measure Payload PDU -> payloadLength=%" PRIu16 "", payloadLength);
/* 4-bytes aligned */
payloadLength &= ~3;
if (!Stream_EnsureRemainingCapacity(s, 8 + payloadLength))
{
WLog_Print(autodetect->log, WLOG_ERROR, "Failed to ensure %" PRIuz " bytes in stream",
8ull + 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) */
winpr_RAND(Stream_Pointer(s), payloadLength);
Stream_Seek(s, payloadLength);
return rdp_send_message_channel_pdu(autodetect->context->rdp, s, SEC_AUTODETECT_REQ);
}
static BOOL autodetect_send_bandwidth_measure_stop(rdpAutoDetect* autodetect,
RDP_TRANSPORT_TYPE transport,
UINT16 sequenceNumber, UINT16 payloadLength)
{
UINT16 requestType = 0;
wStream* s = NULL;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->context);
s = rdp_message_channel_pdu_init(autodetect->context->rdp);
if (!s)
return FALSE;
if (freerdp_get_state(autodetect->context) < CONNECTION_STATE_ACTIVE)
requestType = RDP_BW_STOP_REQUEST_TYPE_CONNECTTIME;
else
requestType = RDP_BW_STOP_REQUEST_TYPE_CONTINUOUS;
if (requestType == RDP_BW_STOP_REQUEST_TYPE_CONTINUOUS)
payloadLength = 0;
WLog_Print(autodetect->log, WLOG_TRACE,
"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))
{
WLog_Print(autodetect->log, WLOG_ERROR,
"Failed to ensure %" PRIuz " bytes in stream", payloadLength);
Stream_Release(s);
return FALSE;
}
/* Random data (better measurement in case the line is compressed) */
winpr_RAND(Stream_Pointer(s), payloadLength);
Stream_Seek(s, payloadLength);
}
}
return rdp_send_message_channel_pdu(autodetect->context->rdp, s, SEC_AUTODETECT_REQ);
}
static BOOL autodetect_send_bandwidth_measure_results(rdpAutoDetect* autodetect,
RDP_TRANSPORT_TYPE transport,
UINT16 responseType, UINT16 sequenceNumber)
{
BOOL success = TRUE;
wStream* s = NULL;
UINT64 timeDelta = GetTickCount64();
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->context);
/* Compute the total time */
if (autodetect->bandwidthMeasureStartTime > timeDelta)
{
WLog_Print(autodetect->log, WLOG_WARN,
"Invalid bandwidthMeasureStartTime %" PRIu64 " > current %" PRIu64
", trimming to 0",
autodetect->bandwidthMeasureStartTime, timeDelta);
timeDelta = 0;
}
else
timeDelta -= autodetect->bandwidthMeasureStartTime;
/* Send the result PDU to the server */
s = rdp_message_channel_pdu_init(autodetect->context->rdp);
if (!s)
return FALSE;
WLog_Print(autodetect->log, WLOG_TRACE,
"sending Bandwidth Measure Results PDU -> timeDelta=%" PRIu64 ", byteCount=%" PRIu32
"",
timeDelta, 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, (UINT32)MIN(timeDelta, UINT32_MAX)); /* timeDelta (4 bytes) */
Stream_Write_UINT32(s, autodetect->bandwidthMeasureByteCount); /* byteCount (4 bytes) */
IFCALLRET(autodetect->ClientBandwidthMeasureResult, success, autodetect, transport,
responseType, sequenceNumber, (UINT32)MIN(timeDelta, UINT32_MAX),
autodetect->bandwidthMeasureByteCount);
if (!success)
{
WLog_Print(autodetect->log, WLOG_ERROR, "ClientBandwidthMeasureResult failed");
return FALSE;
}
return rdp_send_message_channel_pdu(autodetect->context->rdp, s, SEC_AUTODETECT_RSP);
}
static BOOL autodetect_send_netchar_result(rdpAutoDetect* autodetect, RDP_TRANSPORT_TYPE transport,
UINT16 sequenceNumber,
const rdpNetworkCharacteristicsResult* result)
{
wStream* s = NULL;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->context);
s = rdp_message_channel_pdu_init(autodetect->context->rdp);
if (!s)
return FALSE;
WLog_Print(autodetect->log, WLOG_TRACE, "sending Network Characteristics Result PDU");
switch (result->type)
{
case RDP_NETCHAR_RESULT_TYPE_BASE_RTT_AVG_RTT:
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, result->type); /* requestType (2 bytes) */
Stream_Write_UINT32(s, result->baseRTT); /* baseRTT (4 bytes) */
Stream_Write_UINT32(s, result->averageRTT); /* averageRTT (4 bytes) */
break;
case RDP_NETCHAR_RESULT_TYPE_BW_AVG_RTT:
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, result->type); /* requestType (2 bytes) */
Stream_Write_UINT32(s, result->bandwidth); /* bandwidth (4 bytes) */
Stream_Write_UINT32(s, result->averageRTT); /* averageRTT (4 bytes) */
break;
case RDP_NETCHAR_RESULT_TYPE_BASE_RTT_BW_AVG_RTT:
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, result->type); /* requestType (2 bytes) */
Stream_Write_UINT32(s, result->baseRTT); /* baseRTT (4 bytes) */
Stream_Write_UINT32(s, result->bandwidth); /* bandwidth (4 bytes) */
Stream_Write_UINT32(s, result->averageRTT); /* averageRTT (4 bytes) */
break;
default:
WINPR_ASSERT(FALSE);
break;
}
return rdp_send_message_channel_pdu(autodetect->context->rdp, s, SEC_AUTODETECT_REQ);
}
static FREERDP_AUTODETECT_STATE
autodetect_on_connect_time_auto_detect_begin_default(rdpAutoDetect* autodetect)
{
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->RTTMeasureRequest);
if (!autodetect->RTTMeasureRequest(autodetect, RDP_TRANSPORT_TCP, 0x23))
return FREERDP_AUTODETECT_STATE_FAIL;
return FREERDP_AUTODETECT_STATE_REQUEST;
}
static FREERDP_AUTODETECT_STATE
autodetect_on_connect_time_auto_detect_progress_default(rdpAutoDetect* autodetect)
{
WINPR_ASSERT(autodetect);
if (autodetect->state == FREERDP_AUTODETECT_STATE_RESPONSE ||
autodetect->state == FREERDP_AUTODETECT_STATE_COMPLETE)
return FREERDP_AUTODETECT_STATE_COMPLETE;
return autodetect->state;
}
static BOOL autodetect_send_netchar_sync(rdpAutoDetect* autodetect, RDP_TRANSPORT_TYPE transport,
UINT16 sequenceNumber)
{
wStream* s = NULL;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->context);
WINPR_ASSERT(autodetect->context->rdp);
/* Send the response PDU to the server */
s = rdp_message_channel_pdu_init(autodetect->context->rdp);
if (!s)
return FALSE;
WLog_Print(autodetect->log, WLOG_TRACE,
"sending Network Characteristics Sync PDU -> bandwidth=%" PRIu32 ", rtt=%" PRIu32 "",
autodetect->netCharBandwidth, 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, autodetect->netCharBandwidth); /* bandwidth (4 bytes) */
Stream_Write_UINT32(s, autodetect->netCharAverageRTT); /* rtt (4 bytes) */
return rdp_send_message_channel_pdu(autodetect->context->rdp, s, SEC_AUTODETECT_RSP);
}
static BOOL autodetect_recv_rtt_measure_request(rdpAutoDetect* autodetect,
RDP_TRANSPORT_TYPE transport, wStream* s,
const AUTODETECT_REQ_PDU* autodetectReqPdu)
{
WINPR_ASSERT(autodetect);
WINPR_ASSERT(s);
WINPR_ASSERT(autodetectReqPdu);
if (autodetectReqPdu->headerLength != 0x06)
{
WLog_Print(autodetect->log, WLOG_ERROR,
"autodetectReqPdu->headerLength != 0x06 [0x%02" PRIx8 "]",
autodetectReqPdu->headerLength);
return FALSE;
}
WLog_Print(autodetect->log, WLOG_TRACE, "received RTT Measure Request PDU");
/* Send a response to the server */
return autodetect_send_rtt_measure_response(autodetect, autodetectReqPdu->sequenceNumber);
}
static BOOL autodetect_recv_rtt_measure_response(rdpAutoDetect* autodetect,
RDP_TRANSPORT_TYPE transport, wStream* s,
const AUTODETECT_RSP_PDU* autodetectRspPdu)
{
BOOL success = TRUE;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetectRspPdu);
if (autodetectRspPdu->headerLength != 0x06)
{
WLog_Print(autodetect->log, WLOG_ERROR,
"autodetectRspPdu->headerLength != 0x06 [0x%02" PRIx8 "]",
autodetectRspPdu->headerLength);
return FALSE;
}
WLog_Print(autodetect->log, WLOG_TRACE, "received RTT Measure Response PDU");
autodetect->netCharAverageRTT =
(UINT32)MIN(GetTickCount64() - autodetect->rttMeasureStartTime, UINT32_MAX);
if (autodetect->netCharBaseRTT == 0 ||
autodetect->netCharBaseRTT > autodetect->netCharAverageRTT)
autodetect->netCharBaseRTT = autodetect->netCharAverageRTT;
IFCALLRET(autodetect->RTTMeasureResponse, success, autodetect, transport,
autodetectRspPdu->sequenceNumber);
if (!success)
WLog_Print(autodetect->log, WLOG_WARN, "RTTMeasureResponse failed");
return success;
}
static BOOL autodetect_recv_bandwidth_measure_start(rdpAutoDetect* autodetect,
RDP_TRANSPORT_TYPE transport, wStream* s,
const AUTODETECT_REQ_PDU* autodetectReqPdu)
{
WINPR_ASSERT(autodetect);
WINPR_ASSERT(s);
WINPR_ASSERT(autodetectReqPdu);
if (autodetectReqPdu->headerLength != 0x06)
{
WLog_Print(autodetect->log, WLOG_ERROR,
"autodetectReqPdu->headerLength != 0x06 [0x%02" PRIx8 "]",
autodetectReqPdu->headerLength);
return FALSE;
}
WLog_Print(autodetect->log, WLOG_TRACE,
"received Bandwidth Measure Start PDU - time=%" PRIu64 "", GetTickCount64());
/* Initialize bandwidth measurement parameters */
autodetect->bandwidthMeasureStartTime = GetTickCount64();
autodetect->bandwidthMeasureByteCount = 0;
/* Continuous Auto-Detection: mark the start of the measurement */
if (autodetectReqPdu->requestType == RDP_BW_START_REQUEST_TYPE_CONTINUOUS)
{
autodetect->bandwidthMeasureStarted = TRUE;
}
return TRUE;
}
static BOOL autodetect_recv_bandwidth_measure_payload(rdpAutoDetect* autodetect,
RDP_TRANSPORT_TYPE transport, wStream* s,
const AUTODETECT_REQ_PDU* autodetectReqPdu)
{
UINT16 payloadLength = 0;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(s);
WINPR_ASSERT(autodetectReqPdu);
if (autodetectReqPdu->headerLength != 0x08)
{
WLog_Print(autodetect->log, WLOG_ERROR,
"autodetectReqPdu->headerLength != 0x08 [0x%02" PRIx8 "]",
autodetectReqPdu->headerLength);
return FALSE;
}
if (!Stream_CheckAndLogRequiredLengthWLog(autodetect->log, s, 2))
return FALSE;
Stream_Read_UINT16(s, payloadLength); /* payloadLength (2 bytes) */
if (!Stream_CheckAndLogRequiredLengthWLog(autodetect->log, s, payloadLength))
return FALSE;
Stream_Seek(s, payloadLength);
WLog_Print(autodetect->log, WLOG_DEBUG,
"received Bandwidth Measure Payload PDU -> payloadLength=%" PRIu16 "",
payloadLength);
/* Add the payload length to the bandwidth measurement parameters */
autodetect->bandwidthMeasureByteCount += payloadLength;
return TRUE;
}
static BOOL autodetect_recv_bandwidth_measure_stop(rdpAutoDetect* autodetect,
RDP_TRANSPORT_TYPE transport, wStream* s,
const AUTODETECT_REQ_PDU* autodetectReqPdu)
{
UINT16 payloadLength = 0;
UINT16 responseType = 0;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(s);
WINPR_ASSERT(autodetectReqPdu);
if (autodetectReqPdu->requestType == RDP_BW_STOP_REQUEST_TYPE_CONNECTTIME)
{
if (autodetectReqPdu->headerLength != 0x08)
{
WLog_Print(autodetect->log, WLOG_ERROR,
"autodetectReqPdu->headerLength != 0x08 [0x%02" PRIx8 "]",
autodetectReqPdu->headerLength);
return FALSE;
}
if (!Stream_CheckAndLogRequiredLengthWLog(autodetect->log, s, 2))
return FALSE;
Stream_Read_UINT16(s, payloadLength); /* payloadLength (2 bytes) */
}
else
{
if (autodetectReqPdu->headerLength != 0x06)
{
WLog_Print(autodetect->log, WLOG_ERROR,
"autodetectReqPdu->headerLength != 0x06 [0x%02" PRIx8 "]",
autodetectReqPdu->headerLength);
return FALSE;
}
payloadLength = 0;
}
if (!Stream_CheckAndLogRequiredLengthWLog(autodetect->log, s, payloadLength))
return FALSE;
Stream_Seek(s, payloadLength);
WLog_Print(autodetect->log, WLOG_TRACE,
"received Bandwidth Measure Stop PDU -> payloadLength=%" PRIu16 "", payloadLength);
/* Add the payload length to the bandwidth measurement parameters */
autodetect->bandwidthMeasureByteCount += payloadLength;
/* Continuous Auto-Detection: mark the stop of the measurement */
if (autodetectReqPdu->requestType == RDP_BW_STOP_REQUEST_TYPE_CONTINUOUS)
{
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(autodetect, transport, responseType,
autodetectReqPdu->sequenceNumber);
}
static BOOL autodetect_recv_bandwidth_measure_results(rdpAutoDetect* autodetect,
RDP_TRANSPORT_TYPE transport, wStream* s,
const AUTODETECT_RSP_PDU* autodetectRspPdu)
{
UINT32 timeDelta = 0;
UINT32 byteCount = 0;
BOOL success = TRUE;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(s);
WINPR_ASSERT(autodetectRspPdu);
if (autodetectRspPdu->headerLength != 0x0E)
{
WLog_Print(autodetect->log, WLOG_ERROR,
"autodetectRspPdu->headerLength != 0x0E [0x%02" PRIx8 "]",
autodetectRspPdu->headerLength);
return FALSE;
}
WLog_Print(autodetect->log, WLOG_TRACE, "received Bandwidth Measure Results PDU");
if (!Stream_CheckAndLogRequiredLengthWLog(autodetect->log, s, 8))
return FALSE;
Stream_Read_UINT32(s, timeDelta); /* timeDelta (4 bytes) */
Stream_Read_UINT32(s, byteCount); /* byteCount (4 bytes) */
IFCALLRET(autodetect->BandwidthMeasureResults, success, autodetect, transport,
autodetectRspPdu->sequenceNumber, autodetectRspPdu->responseType, timeDelta,
byteCount);
if (!success)
WLog_Print(autodetect->log, WLOG_WARN, "BandwidthMeasureResults failed");
return success;
}
static BOOL autodetect_recv_netchar_sync(rdpAutoDetect* autodetect, RDP_TRANSPORT_TYPE transport,
wStream* s, const AUTODETECT_RSP_PDU* autodetectRspPdu)
{
UINT32 bandwidth = 0;
UINT32 rtt = 0;
BOOL success = TRUE;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(s);
WINPR_ASSERT(autodetectRspPdu);
if (autodetectRspPdu->headerLength != 0x0E)
{
WLog_Print(autodetect->log, WLOG_ERROR,
"autodetectRspPdu->headerLength != 0x0E [0x%02" PRIx8 "]",
autodetectRspPdu->headerLength);
return FALSE;
}
if (!Stream_CheckAndLogRequiredLengthWLog(autodetect->log, s, 8))
return FALSE;
/* bandwidth and averageRTT fields are present (baseRTT field is not) */
Stream_Read_UINT32(s, bandwidth); /* bandwidth (4 bytes) */
Stream_Read_UINT32(s, rtt); /* rtt (4 bytes) */
WLog_Print(autodetect->log, WLOG_TRACE,
"received Network Characteristics Sync PDU -> bandwidth=%" PRIu32 ", rtt=%" PRIu32
"",
bandwidth, rtt);
IFCALLRET(autodetect->NetworkCharacteristicsSync, success, autodetect, transport,
autodetectRspPdu->sequenceNumber, bandwidth, rtt);
if (!success)
WLog_Print(autodetect->log, WLOG_WARN, "NetworkCharacteristicsSync failed");
return success;
}
static BOOL autodetect_recv_netchar_request(rdpAutoDetect* autodetect, RDP_TRANSPORT_TYPE transport,
wStream* s, const AUTODETECT_REQ_PDU* autodetectReqPdu)
{
rdpNetworkCharacteristicsResult result = { 0 };
BOOL success = TRUE;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(s);
WINPR_ASSERT(autodetectReqPdu);
switch (autodetectReqPdu->requestType)
{
case RDP_NETCHAR_RESULTS_0x0840:
/* baseRTT and averageRTT fields are present (bandwidth field is not) */
if (autodetectReqPdu->headerLength != 0x0E)
{
WLog_Print(autodetect->log, WLOG_ERROR,
"autodetectReqPdu->headerLength != 0x0E [0x%02" PRIx8 "]",
autodetectReqPdu->headerLength);
return FALSE;
}
if (!Stream_CheckAndLogRequiredLengthWLog(autodetect->log, s, 8))
return FALSE;
result.type = RDP_NETCHAR_RESULT_TYPE_BASE_RTT_AVG_RTT;
Stream_Read_UINT32(s, result.baseRTT); /* baseRTT (4 bytes) */
Stream_Read_UINT32(s, result.averageRTT); /* averageRTT (4 bytes) */
break;
case RDP_NETCHAR_RESULTS_0x0880:
/* bandwidth and averageRTT fields are present (baseRTT field is not) */
if (autodetectReqPdu->headerLength != 0x0E)
{
WLog_Print(autodetect->log, WLOG_ERROR,
"autodetectReqPdu->headerLength != 0x0E [0x%02" PRIx8 "]",
autodetectReqPdu->headerLength);
return FALSE;
}
if (!Stream_CheckAndLogRequiredLengthWLog(autodetect->log, s, 8))
return FALSE;
result.type = RDP_NETCHAR_RESULT_TYPE_BW_AVG_RTT;
Stream_Read_UINT32(s, result.bandwidth); /* bandwidth (4 bytes) */
Stream_Read_UINT32(s, result.averageRTT); /* averageRTT (4 bytes) */
break;
case RDP_NETCHAR_RESULTS_0x08C0:
/* baseRTT, bandwidth, and averageRTT fields are present */
if (autodetectReqPdu->headerLength != 0x12)
{
WLog_Print(autodetect->log, WLOG_ERROR,
"autodetectReqPdu->headerLength != 0x012 [0x%02" PRIx8 "]",
autodetectReqPdu->headerLength);
return FALSE;
}
if (!Stream_CheckAndLogRequiredLengthWLog(autodetect->log, s, 12))
return FALSE;
result.type = RDP_NETCHAR_RESULT_TYPE_BASE_RTT_BW_AVG_RTT;
Stream_Read_UINT32(s, result.baseRTT); /* baseRTT (4 bytes) */
Stream_Read_UINT32(s, result.bandwidth); /* bandwidth (4 bytes) */
Stream_Read_UINT32(s, result.averageRTT); /* averageRTT (4 bytes) */
break;
default:
WINPR_ASSERT(FALSE);
break;
}
WLog_Print(autodetect->log, WLOG_TRACE,
"received Network Characteristics Result PDU -> baseRTT=%" PRIu32
", bandwidth=%" PRIu32 ", averageRTT=%" PRIu32 "",
result.baseRTT, result.bandwidth, result.averageRTT);
IFCALLRET(autodetect->NetworkCharacteristicsResult, success, autodetect, transport,
autodetectReqPdu->sequenceNumber, &result);
if (!success)
WLog_Print(autodetect->log, WLOG_WARN, "NetworkCharacteristicsResult failed");
return success;
}
state_run_t autodetect_recv_request_packet(rdpAutoDetect* autodetect, RDP_TRANSPORT_TYPE transport,
wStream* s)
{
AUTODETECT_REQ_PDU autodetectReqPdu = { 0 };
const rdpSettings* settings = NULL;
BOOL success = FALSE;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->context);
settings = autodetect->context->settings;
WINPR_ASSERT(settings);
if (!Stream_CheckAndLogRequiredLengthWLog(autodetect->log, s, 6))
return STATE_RUN_FAILED;
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) */
if (WLog_IsLevelActive(autodetect->log, WLOG_TRACE))
{
char rbuffer[128] = { 0 };
const char* requestTypeStr = autodetect_request_type_to_string_buffer(
autodetectReqPdu.requestType, rbuffer, sizeof(rbuffer));
char hbuffer[128] = { 0 };
const char* headerStr =
autodetect_header_type_string(autodetectReqPdu.headerTypeId, hbuffer, sizeof(hbuffer));
WLog_Print(autodetect->log, WLOG_TRACE,
"rdp_recv_autodetect_request_packet: headerLength=%" PRIu8
", headerTypeId=%s, sequenceNumber=%" PRIu16 ", requestType=%s",
autodetectReqPdu.headerLength, headerStr, autodetectReqPdu.sequenceNumber,
requestTypeStr);
}
if (!freerdp_settings_get_bool(settings, FreeRDP_NetworkAutoDetect))
{
char rbuffer[128] = { 0 };
const char* requestTypeStr = autodetect_request_type_to_string_buffer(
autodetectReqPdu.requestType, rbuffer, sizeof(rbuffer));
WLog_Print(autodetect->log, WLOG_WARN,
"Received a [MS-RDPBCGR] 2.2.14.1.1 RTT Measure Request [%s] "
"message but support was not enabled",
requestTypeStr);
goto fail;
}
if (autodetectReqPdu.headerTypeId != TYPE_ID_AUTODETECT_REQUEST)
{
char rbuffer[128] = { 0 };
const char* requestTypeStr = autodetect_request_type_to_string_buffer(
autodetectReqPdu.requestType, rbuffer, sizeof(rbuffer));
char hbuffer[128] = { 0 };
const char* headerStr =
autodetect_header_type_string(autodetectReqPdu.headerTypeId, hbuffer, sizeof(hbuffer));
WLog_Print(autodetect->log, WLOG_ERROR,
"Received a [MS-RDPBCGR] 2.2.14.1.1 RTT Measure Request [%s] "
"message with invalid headerTypeId=%s",
requestTypeStr, headerStr);
goto fail;
}
IFCALL(autodetect->RequestReceived, autodetect, transport, autodetectReqPdu.requestType,
autodetectReqPdu.sequenceNumber);
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(autodetect, transport, 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(autodetect, transport, 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(autodetect, transport, 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(autodetect, transport, 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_request(autodetect, transport, s, &autodetectReqPdu);
break;
default:
WLog_Print(autodetect->log, WLOG_ERROR, "Unknown requestType=0x%04" PRIx16,
autodetectReqPdu.requestType);
break;
}
fail:
if (success)
autodetect->state = FREERDP_AUTODETECT_STATE_REQUEST;
else
autodetect->state = FREERDP_AUTODETECT_STATE_FAIL;
return success ? STATE_RUN_SUCCESS : STATE_RUN_FAILED;
}
state_run_t autodetect_recv_response_packet(rdpAutoDetect* autodetect, RDP_TRANSPORT_TYPE transport,
wStream* s)
{
AUTODETECT_RSP_PDU autodetectRspPdu = { 0 };
const rdpSettings* settings = NULL;
BOOL success = FALSE;
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->context);
WINPR_ASSERT(s);
settings = autodetect->context->settings;
WINPR_ASSERT(settings);
if (!Stream_CheckAndLogRequiredLengthWLog(autodetect->log, s, 6))
goto fail;
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) */
if (WLog_IsLevelActive(autodetect->log, WLOG_TRACE))
{
char rbuffer[128] = { 0 };
const char* requestStr = autodetect_request_type_to_string_buffer(
autodetectRspPdu.responseType, rbuffer, sizeof(rbuffer));
char hbuffer[128] = { 0 };
const char* headerStr =
autodetect_header_type_string(autodetectRspPdu.headerTypeId, hbuffer, sizeof(hbuffer));
WLog_Print(autodetect->log, WLOG_TRACE,
"rdp_recv_autodetect_response_packet: headerLength=%" PRIu8 ", headerTypeId=%s"
", sequenceNumber=%" PRIu16 ", requestType=%s",
autodetectRspPdu.headerLength, headerStr, autodetectRspPdu.sequenceNumber,
requestStr);
}
if (!freerdp_settings_get_bool(settings, FreeRDP_NetworkAutoDetect))
{
char rbuffer[128] = { 0 };
const char* requestStr = autodetect_request_type_to_string_buffer(
autodetectRspPdu.responseType, rbuffer, sizeof(rbuffer));
WLog_Print(autodetect->log, WLOG_WARN,
"Received a [MS-RDPBCGR] 2.2.14.2.1 RTT Measure Response [%s] "
"message but support was not enabled",
requestStr);
return STATE_RUN_FAILED;
}
if (autodetectRspPdu.headerTypeId != TYPE_ID_AUTODETECT_RESPONSE)
{
char rbuffer[128] = { 0 };
const char* requestStr = autodetect_request_type_to_string_buffer(
autodetectRspPdu.responseType, rbuffer, sizeof(rbuffer));
char hbuffer[128] = { 0 };
const char* headerStr =
autodetect_header_type_string(autodetectRspPdu.headerTypeId, hbuffer, sizeof(hbuffer));
WLog_Print(autodetect->log, WLOG_ERROR,
"Received a [MS-RDPBCGR] 2.2.14.2.1 RTT Measure Response [%s] "
"message with invalid headerTypeId=%s",
requestStr, headerStr);
goto fail;
}
IFCALL(autodetect->ResponseReceived, autodetect, transport, autodetectRspPdu.responseType,
autodetectRspPdu.sequenceNumber);
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(autodetect, transport, 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(autodetect, transport, s,
&autodetectRspPdu);
break;
case RDP_NETCHAR_SYNC_RESPONSE_TYPE:
/* Network Characteristics Sync (RDP_NETCHAR_SYNC) - MS-RDPBCGR 2.2.14.2.3 */
success = autodetect_recv_netchar_sync(autodetect, transport, s, &autodetectRspPdu);
break;
default:
WLog_Print(autodetect->log, WLOG_ERROR, "Unknown responseType=0x%04" PRIx16,
autodetectRspPdu.responseType);
break;
}
fail:
if (success)
{
if (autodetectRspPdu.responseType == RDP_BW_RESULTS_RESPONSE_TYPE_CONNECTTIME)
autodetect->state = FREERDP_AUTODETECT_STATE_COMPLETE;
else
autodetect->state = FREERDP_AUTODETECT_STATE_RESPONSE;
}
else
autodetect->state = FREERDP_AUTODETECT_STATE_FAIL;
return success ? STATE_RUN_SUCCESS : STATE_RUN_FAILED;
}
void autodetect_on_connect_time_auto_detect_begin(rdpAutoDetect* autodetect)
{
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->OnConnectTimeAutoDetectBegin);
autodetect->state = autodetect->OnConnectTimeAutoDetectBegin(autodetect);
}
void autodetect_on_connect_time_auto_detect_progress(rdpAutoDetect* autodetect)
{
WINPR_ASSERT(autodetect);
WINPR_ASSERT(autodetect->OnConnectTimeAutoDetectProgress);
autodetect->state = autodetect->OnConnectTimeAutoDetectProgress(autodetect);
}
rdpAutoDetect* autodetect_new(rdpContext* context)
{
rdpAutoDetect* autoDetect = (rdpAutoDetect*)calloc(1, sizeof(rdpAutoDetect));
if (!autoDetect)
return NULL;
autoDetect->context = context;
autoDetect->log = WLog_Get(AUTODETECT_TAG);
return autoDetect;
}
void autodetect_free(rdpAutoDetect* autoDetect)
{
free(autoDetect);
}
void autodetect_register_server_callbacks(rdpAutoDetect* autodetect)
{
WINPR_ASSERT(autodetect);
autodetect->RTTMeasureRequest = autodetect_send_rtt_measure_request;
autodetect->BandwidthMeasureStart = autodetect_send_bandwidth_measure_start;
autodetect->BandwidthMeasurePayload = autodetect_send_bandwidth_measure_payload;
autodetect->BandwidthMeasureStop = autodetect_send_bandwidth_measure_stop;
autodetect->NetworkCharacteristicsResult = autodetect_send_netchar_result;
/*
* Default handlers for Connect-Time Auto-Detection
* (MAY be overridden by the API user)
*/
autodetect->OnConnectTimeAutoDetectBegin = autodetect_on_connect_time_auto_detect_begin_default;
autodetect->OnConnectTimeAutoDetectProgress =
autodetect_on_connect_time_auto_detect_progress_default;
}
FREERDP_AUTODETECT_STATE autodetect_get_state(rdpAutoDetect* autodetect)
{
WINPR_ASSERT(autodetect);
return autodetect->state;
}
rdpAutoDetect* autodetect_get(rdpContext* context)
{
WINPR_ASSERT(context);
WINPR_ASSERT(context->rdp);
return context->rdp->autodetect;
}
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