Grouping of sub attributes in seperate VSAs
aland at deployingradius.com
Thu Apr 12 17:18:52 CEST 2018
On Apr 12, 2018, at 11:07 AM, Бенджамин Томпсон <b.thompson at latera.ru> wrote:
> We have a device which sends individual traffic counters for several
> different services. The dicitionary is as follows:
> VENDOR VasExperts 43823
> BEGIN-VENDOR VasExperts
> ATTRIBUTE VasExperts-Acct-Traffic-Class-Name 16 string
> ATTRIBUTE VasExperts-Acct-Traffic-Class-Input-Octets 17 integer64
> ATTRIBUTE VasExperts-Acct-Traffic-Class-Output-Octets 18 integer64
> ATTRIBUTE VasExperts-Acct-Traffic-Class-Input-Packets 19 integer64
> ATTRIBUTE VasExperts-Acct-Traffic-Class-Output-Packets 20 integer64
That might work...
> In the accounting packet these attribtues are grouped into individual VSAs
> as follows:
If you want *real* grouping, you need to use TLVs. i.e. one master attribute, and the sub-attributes within that.
> Here the fact that the five attributes are gouped together in a single VSA
> means that they all contain data which pertains to the same service.
That's what you mean. But that's not how RADIUS works. The attributes are all in a flat space.
> When FreeRADIUS processes the packet the attribtues are as I understand it
> added to one long list and I can access them individually by their index.
> However, as I understand it the ordering of RADIUS attributes is not
> something which is normally guaranteed
RADIUS guarantees ordering of attributes which have the same number. It does NOT guarantee ordering of attributes which have a different number.
This restriction applies to VSAs, soo.
> and I would like to ask is whether
> there is any way in unlang or by other means to figure out which which sub
> attribtues came from the same parent attribute.
No. But you can fix the dictionary:
VENDOR VasExperts 43823
ATTRIBUTE VasExperts-Acct-Traffic 16 tlv
ATTRIBUTE VasExperts-Acct-Traffic-Class-Name 16.1 string
ATTRIBUTE VasExperts-Acct-Traffic-Class-Input-Octets 16.2 integer64
ATTRIBUTE VasExperts-Acct-Traffic-Class-Output-Octets 16.3 integer64
ATTRIBUTE VasExperts-Acct-Traffic-Class-Input-Packets 16.4 integer64
ATTRIBUTE VasExperts-Acct-Traffic-Class-Output-Packets 16.5 integer64
These attributes will be packed into one parent attribute: VasExperts-Acct-Traffic. And ordering of THAT attribute is guaranteed.
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