Space Link Extension - Service Management - CCSDS

DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT
supported-operation validation to the appropriate operation applications, as defined in the
procedure patterns in 3.4 and the specific operations defined in sections 4 through 7 of this
Recommended Standard.
3.3.2.4 Sender Receives and Validates SLE-SM Exception Responses
3.3.2.4.1 General
If the Sender sent a message set that was unrecognizable to the Receiver or that contained
messages that were invalid to the Receiver, the Sender receives one or more exception
responses (UnrecognizedMessageSetResponse or InvalidMessageResponse)
from the Receiver via the Sender’s exception response port.
NOTE – ‘Sender’ herein refers to the transmitter of the original message set, and not to the
transmitter of the exception response(s) (which is the Receiver).
3.3.2.4.2 Exception Response Validation
Upon receipt of a document at the Sender’s exception response port, the Sender shall perform
syntactic validation and InvalidMessageResponse authorization validation (as
appropriate). These validation steps are described in subsequent paragraphs.
Syntactic validation. The Sender shall perform syntactic validation of the document to
ensure that the document is a properly formatted exception response, either an
UnrecognizedMessageSetResponse or an InvalidMessageResponse. If the
Sender cannot syntactically validate the SLE-SM document, the Sender shall terminate
processing of the document and has no further obligation for interpreting and acting upon the
document. However, the Sender may perform locally defined troubleshooting activities.
Authorization validation. If the syntactically valid SLE-SM document contains an
InvalidMessageResponse, the Sender shall perform authorization validation of the
message to ensure (a) that the Receiver is authorized to use the sleSmCreatorName (see
table 3-3) in the InvalidMessageResponse that contains the message, (b) that the
Service Agreement identified by the serviceAgreementRef (table 3-3) in the
InvalidMessageResponse is supported by the Sender, and (c) that the Receiver is
authorized to send messages in the context of the Service Agreement identified by the
serviceAgreementRef in the InvalidMessageResponse. If the Sender is unable
to validate the authorization of the Receiver, the Sender terminates processing of the
InvalidMessageResponse, after which the Sender has no further obligation for
interpreting and acting upon the message. However, the Sender may perform locally defined
troubleshooting activities such as contacting the source of the unauthorized Invalid-
MessageResponse.
CCSDS 910.11-R-2 Page 3-8 March 2008