topic Re: Pack and unpack Radius VSA attributes in Network Access Control

Pack and unpack Radius VSA attributes

denis.deryabin — Mon, 11 Mar 2019 00:30:16 GMT

As far as I know there are some methods to pack radius VSA attributes. Here are:

As the part of Cisco-AVPair
- 26 - VSA
- Length
- 9 - Vendor ID
- 1 - Vendor Type (Cisco-AVPair Attribute ID)
- Attribute Name=Value
In the Vendor Specific attribute ("throught attribute ID")
- 26 - VSALength
- 9 - Vendor ID
- 2 - Vendor Type (Attribute ID)
- Vendor Length
- Attribute Name=Value
In the Vendor Specific attribute ("throught attribute ID")
- 26 - VSA
- Length
- 9 - Vendor ID
- 2 - Vendor Type (Attribute ID)
- Value

i.e. with attribute name and witout.
How to understand which attribute needs attribute name in value string?

For example:

26|Length|9|2|Vendor Length|1|h323-incoming-conf-id=82b5fc8cd6f411dfa3c6080027716a9a
26|Length|9|2|Vendor Length|35|h323-incoming-conf-id=82b5fc8cd6f411dfa3c6080027716a9a
26|Length|9|2|Vendor Length|35|82b5fc8cd6f411dfa3c6080027716a9a

which of the methods is right?

Re: Pack and unpack Radius VSA attributes

wzhang — Tue, 19 Oct 2010 19:33:50 GMT

Hi,

For the specific VSA you used in the example (h323-incoming-conf-id), (1) is the correct encoding, since Cisco VSA vendor type 1 (also more commonly referred to as cisco AV Pair) is always encoded in strings with the format of "attribute=value". This applies to other cisco VSAs that use string encoding as well. For VSA's that don't use string encoding, eg., fax-pages (vendor type 5, encoding integer), it typically doesn't include the value. You should be able to check that against the vendor dictionary to confirm. Please also see:

http://www.cisco.com/en/US/docs/ios/voice/cdr/developer/guide/cdrdefs.html

Thanks,

Wen

Re: Pack and unpack Radius VSA attributes

d-costa — Tue, 17 May 2011 19:22:06 GMT

Hi Wen,

I have looked at http://www.cisco.com/en/US/docs/ios/voice/cdr/developer/guide/cdrdefs.html, I found the possible values for atribute “gw-rxd-cgn”, but not the meaning of them.

Example:
Cisco-AVPair = "gw-rxd-cgn=ton:0,npi:0,pi:1,si:0,#:391450098"
Cisco-AVPair = "gw-rxd-cgn=ton:0,npi:0,pi:0,si:0,#:391450098"

I think pi:1 means that the calling number is anonymous and pi:0 is present, they can also be 2 or 3. Where can I found information to decode this string and other VSAs strings?

Thanks,
David Costa