[SR-Users] UDP-TCP bridging in-dialog SUBSCRIBE

Alex Balashov abalashov at evaristesys.com
Wed Nov 12 20:15:29 CET 2014

On 11/12/2014 02:13 PM, Dan Christian Bogos wrote:
> Hey Guys,
> I have the following scenario:
> UA1 (UDP) -> Kamailio Proxy -> (TCP) UA2
> As per the signaling sample, I would expect that in-dialog SUBSCRIBEs
> are bridged between UDP and TCP network but for some reason this does
> not happen (the subscribe comes in over UDP and leaves still over UDP
> although tcp is present in the route headers). Are we somehow forced to
> mangle contact header and add transport parameter to it or the
> record-route headers should serve for this purpose?
> Any tip would be highly appreciated.

Yes, I believe the UDP transport is chosen by default, and there must be 
a ;transport=TCP based-reason to relay anything via TCP.

Alex Balashov - Principal
Evariste Systems LLC
235 E Ponce de Leon Ave
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United States

Tel: +1-678-954-0670
Web: http://www.evaristesys.com/, http://www.alexbalashov.com/

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