2.2.5.1 Server Set Error Info PDU

The Set Error Info PDU is sent by the server when there is a connection or disconnection failure. This PDU is only sent to clients which have indicated that they are capable of handling error reporting using the RNS_UD_CS_SUPPORT_ERRINFO_PDU flag in the Client Core Data (section 2.2.1.3.2).


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tpktHeader

x224Data

mcsSDin (variable)

...

securityHeader (variable)

...

errorInfoPduData (22 bytes)

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...

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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.

mcsSDin (variable): Variable-length PER-encoded MCS Domain PDU (DomainMCSPDU) which encapsulates an MCS Send Data Indication structure (SDin, choice 26 from DomainMCSPDU), as specified in [T125] section 11.33 (the ASN.1 structure definitions are given in [T125] section 7, parts 7 and 10). The userData field of the MCS Send Data Indication contains a Security Header and a Set Error Info PDU Data (section 2.2.5.1.1) structure.

securityHeader (variable):  Optional security header. The presence and format of the security header depends on the Encryption Level and Encryption Method selected by the server (sections 5.3.2 and 2.2.1.4.3). If the Encryption Level selected by the server is greater than ENCRYPTION_LEVEL_NONE (0) and the Encryption Method selected by the server is greater than ENCRYPTION_METHOD_NONE (0) then this field MUST contain one of the following headers:

If the Encryption Level selected by the server is ENCRYPTION_LEVEL_NONE (0) and the Encryption Method selected by the server is ENCRYPTION_METHOD_NONE (0), then this header MUST NOT be included in the PDU.

errorInfoPduData (22 bytes): The contents of the Set Error Info PDU, as specified in section 2.2.5.1.1.

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