(RADIATOR) accounting request Acct-Session-Id lost in conversion from diameter to radius

[Blake Ulmer]

Hello again,
 
Thanks for the quick reply to my first posting (undefined Authenticator
field converting from diameter to radius).  I have another potential
problem in the diameter to radius conversion, specifically for
accounting packets.
 
Again, my environment is 3.16 on RHEL4.  I'm doing a diamter accounting
request (using diapwtst) to radiator, which converts it to radius, and
sends it off to my third party radius server.  The radius server is not
accepting the request, because Acct-Session-Id is not present.
 
I specify -session_id <whatever> to diapwtst, and I can see the
originating diameter request containing the session-id (if I don't
specify anything, then I get a default session-id, but it's there).
However, the converted radius acct request does not contain it.
 
I dove into ServerDIAMETER.pm, and found that the
copy_dia_to_radius_attrs method only converts a few specific attributes,
and then anything with an attribute number below 256.  The session-id
field (ACODE_SESSION_ID) has a value of 263, which is why it isn't being
converted.  That set of ifs also has no plain old, "else", which is why
there's no log message or anything about why it isn't converted, or that
it isn't being converted.
 
I have a somewhat kludgey fix I'm using, which is to simply add another
if for the diameter ACODE_SESSION_ID, which copies $value into the
packet for Acct-Session-Id, and that seems to work.
 
I know that Acct-Session-Id is required by the radius RFC, and so I
wonder why the attribute is only copied if the attribute number is less
than 256?  It seems either that number should be much larger, or a
specific case needs to be entered for ACODE_SESSION_ID.
 
Thank you again,
Blake Ulmer
 
Here's a snippet of the Acct-Session-Id not being translated (in an
accounting request), for kicks:
 
**************************************************************
Tue Mar 20 18:37:05 2007: DEBUG: zulu.open.com.au <- testoriginhost
recv_v1msg:
  Code:           271 (Accounting)
  Version:        1
  Flags:          0x80 (R)
  Application ID: 1 (Nasreq)
  Hop-to-Hop ID:  2
  End-to-End ID:  554696706
  Attributes:
    Session-Id: 64, 5,
    Origin-Host: 64, testoriginhost,
    Origin-Realm: 64, testoriginrealm,
    User-Name: 64, bob at hal9002.com,
    Called-Station-Id: 64, 123456789,
    Calling-Station-Id: 64, 987654321,
    NAS-Port: 64, 1234,
    Accounting-Record-Type: 64, START_RECORD,
    Accounting-Record-Number: 64, 12345,
Tue Mar 20 18:37:05 2007: DEBUG: StateMachine::event R-Rcv-Message in
state R-Open. Calling Process
Tue Mar 20 18:37:05 2007: DEBUG: zulu.open.com.au Process
Tue Mar 20 18:37:05 2007: DEBUG: Packet dump:
*** Diameter request converted to Radius request ....
Code:       Accounting-Request
Identifier: UNDEF
Authentic:  1234567890123456
Attributes:
        NAS-Identifier = "testoriginhost"
        User-Name = "bob at hal9002.com"
        Called-Station-Id = "123456789"
        Calling-Station-Id = "987654321"
        NAS-Port = 1234
        Acct-Status-Type = 1
 
Tue Mar 20 18:37:05 2007: DEBUG: Handling request with Handler
'Realm=hal9002.com'
Tue Mar 20 18:37:05 2007: DEBUG: Handling with Radius::AuthRADIUS
Tue Mar 20 18:37:05 2007: DEBUG: Packet dump:
*** Sending to 192.168.3.248 port 1813 ....
 
Packet length = 93
04 01 00 5d e8 28 e8 a6 c7 39 60 1f 3f eb d6 1c
cf 9c ac 40 20 10 74 65 73 74 6f 72 69 67 69 6e
68 6f 73 74 01 11 62 6f 62 40 68 61 6c 39 30 30
32 2e 63 6f 6d 1e 0b 31 32 33 34 35 36 37 38 39
1f 0b 39 38 37 36 35 34 33 32 31 05 06 00 00 04
d2 28 06 00 00 00 01 29 06 00 00 00 00
Code:       Accounting-Request
Identifier: 1
Authentic:  <0><0><0><0><0><0><0><0><0><0><0><0><0><0><0><0>
Attributes:
        NAS-Identifier = "testoriginhost"
        User-Name = "bob at hal9002.com"
        Called-Station-Id = "123456789"
        Calling-Station-Id = "987654321"
        NAS-Port = 1234
        Acct-Status-Type = 1
        Acct-Delay-Time = 0
**************************************************************
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