[SR-Users] How to access registration contact user agent string in branch route after location lookup?

Hi List

I have some CPE which require special handling like removing 100rel and update from the supported methods because they misbehave.

Previously, I was using reg_fetch_contacts and then appending the branches manually and stacking the UA in an AVP. With the branch index this allowed me to get the AVP containing the UA to which the call was branched in the branch route and perform filtering of methods based on UA, but it was complicated.

Now I use the intended function lookup_to_dset() but now I miss how to access the register contact UA from within a branch route.

Is there an intended way to access that information?

Mit freundlichen Grüssen

-Benoît Panizzon-