2.2.14.1.2 Bandwidth Measure Start (RDP_BW_START)

The RDP_BW_START structure is used to start a bandwidth measurement operation.


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headerLength

headerTypeId

sequenceNumber

requestType

headerLength (1 byte): An 8-bit unsigned integer that specifies the size, in bytes, of the header data. This field MUST be set to 0x06.

headerTypeId (1 byte): An 8-bit unsigned integer that specifies the high-level type. This field MUST be set to TYPE_ID_AUTODETECT_REQUEST (0x00).

sequenceNumber (2 bytes): A 16-bit unsigned integer that specifies the message sequence number.

requestType (2 bytes): A 16-bit unsigned integer that specifies a request type code. This field MUST be set to one of the following values.

Value

Meaning

0x0014

One of two possible meanings:

  • The Bandwidth Measure Start message is encapsulated in the SubHeaderData field of an RDP_TUNNEL_SUBHEADER ([MS-RDPEMT] section 2.2.1.1.1) structure that is being tunneled over a reliable UDP multitransport connection ([MS-RDPEMT] sections 1.3 and 2.1).

  • The Bandwidth Measure Start message is encapsulated in the autoDetectReqPduData field of an Auto-Detect Request PDU (section 2.2.14.3) sent after the RDP Connection Sequence (section 1.3.1.1) has completed.

0x0114

The Bandwidth Measure Start message is encapsulated in the SubHeaderData field of an RDP_TUNNEL_SUBHEADER ([MS-RDPEMT] section 2.2.1.1.1) structure that is being tunneled over a lossy UDP multitransport connection ([MS-RDPEMT] sections 1.3 and 2.1).

0x1014

The Bandwidth Measure Start message is encapsulated in the autoDetectReqPduData field of an Auto-Detect Request PDU sent during the Optional Connect-Time Auto-Detection phase of the RDP Connection Sequence.

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