This feature classifies a REGISTER request according its type (register, re-register, or de-register).

Classifying a REGISTER request

The DetermineRegistrationActionType feature examines the Contact headers of the first-party REGISTER request received in the body of the third-party REGISTER request.

A register is present if for any contact header:

  • the contact header expires parameter is present and is not zero

  • the contact header expires parameter is not present, but the request expires header is present and is not zero

A de-register is present if for any contact header:

  • the contact header expires parameter is present and zero

  • the contact header address is a wildcard and the request expires header is present and zero

  • the request expires header is present and zero and the contact header expires parameter is not present

The action that should be taken is based on the following table:

Table 1. Actions
register is present de-register is present have previous registration data action

false

true

-

de-register

true

true

-

re-register

-

false

true

re-register

-

false

false

register

Details

Feature script name

DetermineRegistrationActionType

Applicable contexts

SIP service

SAS Support

No

Prerequisite features

Session state inputs and outputs

Inputs

SentinelSelectionKey

A selection key with the platform operator, network operator and session type set (such as OpenCloud:OpenCloud:eSRVCCRegistration::)

EncapsulatedRegisterRequest

The first-party REGISTER request that was in the body of the third-party REGISTER request received by the registrar.

PreviousRegistrationData

A list of registration records including all pre-existing, active registrations associated with the subscriber and call ID.

Outputs

SentinelSelectionKey

A selection key with the platform operator, network operator, session type and plan-id set (such as OpenCloud:OpenCloud:eSRVCCRegistration:de-register:)

RejectRegisterRequest

Set to true, if the first-party REGISTER request could not be analysed. For example, if the REGISTER request has a Contact with a wildcard address, while its Expires header is absent, or not equal to zero

Feature responses

featureHasfinished()

Once the feature has finished
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Sentinel Express Version 4.0.0