Accoiunting proxy Issue

[Richard J Palmer]

Hi there

We use firebrick Routers as LNS routers and they have worked fine in 
the past.

However I have a new requirement to proxy one realm (authentication 
and accounting) to a remote server for a customer. I have the auth 
side working find - and the account start packet.

However the firebrick does not provide the username in interim updates 
or stop messages - which means that the proxy based on realm fails 
(the username / realm is not there).

Is there a way using unlang to proxy these - I was looking at the 
lines in detail - we do also have the records in our SQL server and 
from the AcctSessionID I can look up the username which is possible

I do have one other possibility. The Interim updates have a field:
Chargeable-User-Identity = "XXXXX"
Which  I can set as part of the auth process (I already add some 
fields in post_proxy). Is there a way in FreeRadius to inspect this 
field in a accounting packet and if set to 'resellerx' set the packet 
to be sent to their proxy / home server ?

The second I assume would be faster ....

I have also emailed the router manufacturer to see if the username can 
be added easily in a software patch but that may take time  ...

An example current accounting packet is:

Sun Nov 26 20:00:05 2017
        Acct-Status-Type = Interim-Update
        Chargeable-User-Identity = "BBEU12345675"
        Event-Timestamp = "Nov 26 2017 20:00:00 GMT"
        Acct-Input-Octets = 7137840
        Acct-Input-Gigawords = 0
        Acct-Output-Octets = 487340050
        Acct-Output-Gigawords = 0
        Acct-Session-Time = 576
        Acct-Input-Packets = 99535
        Acct-Output-Packets = 342237
        Tunnel-Client-Endpoint:0 = "ADSL"
        NAS-Identifier = "aglovale.merula.net"
        Acct-Session-Id = "S600000269717072AECC00"
        NAS-IP-Address = 1.2.3.4
        NAS-Port = 697
        Connect-Info = "39550000/1000000000"
        Acct-Unique-Session-Id = "c89cbc69ab30d4afaff763c46057b04e"
        Timestamp = 1511726405



I would be grateful for any suggestions

Richard