STIR/SHAKEN Attributes

This table lists and describes the STIR/SHAKEN attributes and includes attribute name, attribute description, attribute value, attribute value type, and messages.

Attribute Name	Attribute Description	Attribute Value	Attribute Value Type	Messages
Acme-Stir-Signed-Request	This AVP indicates that the SBC has sent the signing request to the STI-AS and received a response. Values for this AVP mean: 1— The SBC has signed the INVITE. 0—The SBC has not signed the INVITE. 2—Signing is not applicable for the INVITE.	249, extension 11	String	INTERIM STOP
Acme-Stir-Signed-Request-Exception-Id	This AVP indicates that the SBC did not sign the INVITE because of a failure response from the STI-AS. It includes the ATIS defined service and policy exception id (e.g. SVC4000, SVC4001, POL4050). Potential values are in the table below.	249, extension 12	String	INTERIM STOP
Acme-Stir-Verification-Request	This AVP indicates that the SBC has sent the verification request to the STI-VS and received a response. Values for this AVP mean: 1— The SBC has verified the request. 0—The SBC has not signed verified the request. 2—Request verification is not applicable for the call.	249, extension 13	String	START INTERIM STOP
Acme-Stir-Verification-Request-Exception-Id	This AVP indicates that the SBC did not verify the request because of a failure response from the STI-VS. It includes the ATIS defined service and policy exception id (e.g. SVC4000, SVC4001, POL4050). Potential values are in the table below.	249, extension 14	String	START INTERIM STOP
Stir-VS-Verstat	The SBC populates this AVP with the verstat values the SBC includes in the SIP INVITE following the Stir Shaken trigger. Potential values include TN-Validation-Passed, TN-Validation-Failed or No-TN-Validation	249, extension 15	String	START INTERIM STOP
Stir-VS-Reason	The SBC populates this AVP with received reason information.	249, extension 16	String	START INTERIM STOP

STIR/SHAKEN attributes are embedded under one extended Radius AVP.

type = 26 (vendor-specific)
length = ...
vendor-id = 9148 (acme)
vendor-type = 249 (extended-attributes)
vendor-length = ...
vendor-data = { x-attr-type (16-bit), x-attr-len (16-bit), x-attr-data (variable) }

An example of an AVP presenting the Acme-Stir-Signed-Request attribute indicating the SBC has signed the INVITE appears as follows:

x-attr-type = 1 (Acme-Stir-Signed-Request) [1 byte]
x-attr-len = … [1 byte] 
x-attr-data = { version[1 byte], Acme-Stir-Signed-Request [depending on length]}

ATIS Defined Service and Policy Exception Codes

This table lists the potential ATIS defined service and policy exception codes that can be provided using the Stir-Signed-Request-Exception-Id or Stir-Verified-Request-Exception-Id AVP.

Exception ID	Exception Text	HTTP Status Code
SVC4000	Missing request body	400
SVC4001	Missing mandatory parameter ‘%1’	400
SVC4002	Requested response body type ‘%1’is not supported	406
SVC4003	Requested resource was not found	404
SVC4004	Unsupported request body type, expected ‘%1’	415
SVC4005	Invalid ‘%1’ parameter value: %2	400
SVC4006	Failed to parse received message body: %1	400
SVC4007	Missing mandatory Content-Length header 411	411
POL4050	Method not allowed	405
POL5000	Internal Server Error. Please try again later	500