3.3.5.3.1 Processing a Cancel Request Message

The structure and fields of the CANCEL_REQUEST message are specified in section 2.2.6.1.

After receiving the CANCEL_REQUEST message, the client MUST attempt to stop processing the request identified by the RequestId field in the CANCEL_REQUEST message. If the current request has not been completed it MUST be canceled. If the request has been completed, the client MUST ignore this CANCEL_REQUEST message.