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3.2.2.5.11 Connection Close, Connection Error, and Protocol Error Encountered

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Connection close and connection error encountered MUST be handled and indicated to higher layers identically by implementations of this protocol. This section discusses connection close only, and implementations of this protocol MUST handle connection errors that it encounters in the same way. A connection close can come from either the inbound proxy or outbound proxy. Processing is equivalent in both cases.

This section discusses connection close from the outbound proxy, but all parts of the specification in this section apply equally to connection close received from the inbound proxy. If a connection is closed by the outbound proxy, the client implementation MUST find the virtual connection to which the OUT channel belongs, and unless the OUT channel is in state opened and the connection close comes from a predecessor outbound proxy, the client implementation MUST do the following:

  • Free any data structures associated with it.

  • Close all the channels that belong to this virtual connection.

  • Stop execution on the state machine.

If the connection is closed in state opened and the connection close comes from a predecessor outbound proxy, the client implementation MUST ignore this event.

If a connection close by the inbound proxy is preceded by an IN channel response as specified in section 2.1.2.1.3, the client MUST process its fields as specified later in this section.

Section 2.1.2.1.3 defines the reason-phrase, which should be interpreted as follows.

RPC-Error: MUST be interpreted by the client implementation as a hexadecimal representation of an error code and MUST be returned to a higher-layer protocol in an implementation-specific way.<33>

Clients SHOULD ignore ee-info in the message header if the message body contains it.

EncodedEEInfo: MUST be interpreted by the client implementation as a base64-encoded [MS-EERR] BLOB and MUST be processed as specified in [MS-EERR] and made available to higher-layer protocols in an implementation-specific way.

The message-body MUST be in the format specified in section 2.1.2.1.3.

If the message-body has EncodedEEInfo, the client SHOULD use that and ignore the EncodedEEInfo from the message header.

EncodedEEInfo: MUST be interpreted by the client implementation as a base64-encoded [MS-EERR] BLOB and MUST be processed as specified in [MS-EERR] and made available to higher-layer protocols in an implementation-specific way.<34>

The client implementation MUST handle the protocol error in the following manner:

  • Close all channels to the inbound and outbound proxy for the virtual connection on which the error was encountered.

  • Free all data structures associated with the virtual connection.

  • Stop execution on the state machine.