[OpenSIPS-Users] Automatic support for UDP->TCP when MTU size reached?

[Gavin Murphy]

Hi all,

     I did a search on this and the most recent discussion I saw was 
from 2010, so I figured I would pose the question again: is there a way 
to have OpenSIPS automatically adjust the transport from UDP to TCP when 
the request size is within 200 bytes of the MTU size, as per section 
18.1.1 of RFC 3261? I understand that NAPTR could be used to select the 
most desirable transport based on the destination, but what about based 
on message size? If it isn't supported automatically, is there a way to 
determine the message size just ahead of it being relayed so as to 
perhaps be able to alter the transport?

Thanks,

Gavin