[Kea-users] Option 82 delimiter

[Frey, Rick E]

I’m using memfile (CSV) for leases so not sure if format differs from SQL, but CSV format for user_context field is JSON with attribute name of “relay-agent-info” and the value is entire option 82 hex value as sent over wire.   Assuming SQL value is same, you could parse hex value into sub options 1 and 2 per RFC 3046:
https://datatracker.ietf.org/doc/html/rfc3046#page-8



From: Kea-users <kea-users-bounces at lists.isc.org> on behalf of Travis C - Surf BB <tchesna at surfbroadband.com>
Date: Monday, February 7, 2022 at 7:32 AM
To: kea-users at lists.isc.org <kea-users at lists.isc.org>
Subject: [Kea-users] Option 82 delimiter
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Is there a delimiter or a way to pull the sub-option 2 from option 82
when it is stored in the user context through the store-extended-info
flag? I am using sql for storing leases. So far I do not see a
delimiter, I just see the two sub-options merged together and then stored.

Does anyone have any ideas on a good way to store just the sub-option 2
so it can be recalled? The end goal that I need is IP, hwaddr, and
option82 suboption2. I cant definitively say that suboption 2 will be a
mac address, or X amount of characters, otherwise it wouldnt be too
difficult. I was thinking about using a script and writing into another
table, but that feels sloppy to me and a good way for something to get
missed or out of sync.

Thanks, Travis

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