2.2.1.6 Client MCS Attach User Request PDU
The MCS Attach User Request PDU is an RDP Connection Sequence PDU sent from client to server during the Channel Connection phase of the RDP Connection Sequence to request a User Channel ID (see section 1.3.1.1 for an overview of the RDP Connection Sequence phases). It is sent after transmitting the MCS Erect Domain Request PDU (section 2.2.1.5).
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tpktHeader |
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mcsAUrq |
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tpktHeader (4 bytes): A TPKT Header, as specified in [T123] section 8.
x224Data (3 bytes): An X.224 Class 0 Data TPDU, as specified in [X224] section 13.7.
mcsAUrq (1 byte): PER-encoded MCS Domain PDU that encapsulates an MCS Attach User Request structure, as specified in [T125] section 11.17 (the ASN.1 structure definitions are given in [T125] section 7, parts 5 and 10).