Hello,
On 05/19/06 05:49, T.R. Missner wrote:
Hello,
Is it possible to use openSER as TCP <--> UDP convertor?
yes, it is possible. OpenSER can perform transport layer conversion.
I have this working to a certain extent.
1) UA -> TCP INV -> openSER -> UDP INV -> Carrier
2) UA <- TCP 200 <- openSER <- UDP 200 <- Carrier
3) UA -> TCP ACK -> openSER -> UDP ACK -> Carrier
Setup transaction works like it should.
My question is about subsequent transactions.
In the 200 from Carrier (2) a parameter of transport=udp is set on the
contact header.
Now if the UA is running in an automatic protocol mode ( this would be
UA specific ), It honors the transport=udp param and sends a BYE or
re-Invite as UDP
The ua has to honor the Record-Route from 200OK, which would specify the
TCP transport. The proxy is the one which has to honor the Contact
header, being the one which delivers the message to that hop.
Cheers,
Daniel
4) UA -> UDP BYE -> openSER -> UDP BYE -> Carrier
5) UA <- UDP 200 <- openSER <- UDP 200 <- Carrier
Is there a way to re-write the transport= param in the contact header
of the 200 ( msg 2 ) so it says transport=tcp Which would then allow
the subsequent request messages from UA to be sent tcp?
Would doing this break the rfc?
Is anyone using openSER to accomplish similar protocol conversion?
Thanks,
T.R.
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*T.R. Missner*
/Director Enterprise VoIP Products/
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