2.2.1.13.1.1 Demand Active PDU Data (TS_DEMAND_ACTIVE_PDU)
The TS_DEMAND_ACTIVE_PDU structure is a standard T.128 Demand Active PDU ([T128] section 8.4.1).
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shareControlHeader |
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shareID |
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lengthSourceDescriptor |
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lengthCombinedCapabilities |
sourceDescriptor (variable) |
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numberCapabilities |
pad2Octets |
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capabilitySets (variable) |
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sessionId |
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shareControlHeader (6 bytes): Share Control Header (section 2.2.8.1.1.1.1) containing information about the packet. The type subfield of the pduType field of the Share Control Header MUST be set to PDUTYPE_DEMANDACTIVEPDU (1), and the PDUVersion subfield MUST be set to TS_PROTOCOL_VERSION (0x1).
shareID (4 bytes): A 32-bit, unsigned integer. The share identifier for the packet ([T128] section 8.4.2 for more information regarding share IDs).
lengthSourceDescriptor (2 bytes): A 16-bit, unsigned integer. The size in bytes of the sourceDescriptor field.
lengthCombinedCapabilities (2 bytes): A 16-bit, unsigned integer. The combined size in bytes of the numberCapabilities, pad2Octets, and capabilitySets fields.
sourceDescriptor (variable): A variable-length array of bytes containing a source descriptor (see [T128] section 8.4.1 for more information regarding source descriptors).
numberCapabilities (2 bytes): A 16-bit, unsigned integer. The number of capability sets included in the Demand Active PDU.
pad2Octets (2 bytes): A 16-bit, unsigned integer. Padding. Values in this field MUST be ignored.
capabilitySets (variable): An array of Capability Set (section 2.2.1.13.1.1.1) structures. The number of capability sets is specified by the numberCapabilities field.
sessionId (4 bytes): A 32-bit, unsigned integer. The session identifier. This field is ignored by the client.