RADIUS attribute from rfc2865
This Attribute is available to be sent by a proxy server to
another server when forwarding an Access-Request and MUST be
returned unmodified in the Access-Accept, Access-Reject or
Access-Challenge. When the proxy server receives the response to
its request, it MUST remove its own Proxy-State (the last Proxy-
State in the packet) before forwarding the response to the NAS.
If a Proxy-State Attribute is added to a packet when forwarding
the packet, the Proxy-State Attribute MUST be added after any
existing Proxy-State attributes.
The content of any Proxy-State other than the one added by the
current server should be treated as opaque octets and MUST NOT
affect operation of the protocol.
Usage of the Proxy-State Attribute is implementation dependent. A
description of its function is outside the scope of this
A summary of the Proxy-State Attribute format is shown below. The
fields are transmitted from left to right.
0 1 2
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
| Type | Length | String ...
33 for Proxy-State.Length
The String field is one or more octets. The actual format of the
information is site or application specific, and a robust
implementation SHOULD support the field as undistinguished octets.
The codification of the range of allowed usage of this field is
outside the scope of this specification.