RADIUS attribute from rfc5090
This attribute is used to transport the contents of the digest-uri directive or the URI of the HTTP-style request. It MUST only be used in Access-Request and Accounting-Request packets. Type 109 for Digest-URI Length >= 3 Text If the HTTP-style request has an Authorization header, the RADIUS client puts the value of the uri directive found in the HTTP-style request Authorization header (known as "digest-uri- value" in) without surrounding quotes into this attribute. If there is no Authorization header, the RADIUS client takes the value of the request URI from the HTTP-style request it wants to authenticate.