2.2.3.1 Server Deactivate All PDU

The Deactivate All PDU is sent from server to client to indicate that the connection will be dropped or that a capability re-exchange using a Deactivation-Reactivation Sequence will occur (see section 1.3.1.3 for an overview of the Deactivation-Reactivation Sequence).


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tpktHeader

x224Data

mcsSDin (variable)

...

securityHeader (variable)

...

deactivateAllPduData (variable)

...

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 Deactivate All PDU Data (section 2.2.3.1.1) 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.

deactivateAllPduData (variable): The contents of the Deactivate All PDU, as specified in section 2.2.3.1.1.

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