[Serusers] SIP Symmetric Response support in SER

[Jiri Kuthan]

That is imho a useful thing to add to ser -- but that's better
addressed by Andrei, who is owner of the piece of code in question
and who is off-line this week.

Are you aware of a client supporting rport?

-Jiri

At 08:10 PM 1/8/2003, Maxim Sobolev wrote:
>Hi,
>
>Are there any plans to add SIP Symmetric Response support
>(http://www.iptel.org/info/players/ietf/firewall/nat/draft-ietf-sip-symmetric-response-00.txt)
>into SER, so that it would be possible to use compliant UAs behind NATs
>with SER being on a public IP? The idea is simple: when the SIP packet
>is received from UA, the server checks if an empty `rport' parameter
>is present in the first Via field, and if yes then compares IP:PORT in
>the first Via header with the actual IP:PORT this request came from,
>and adds `received' and `rport' parameters into the header if either
>doesn't match before forwarding request further.
>
>Then, when replying or forwarding the request, the server checks if
>any of received or rport is present and uses it instead of the
>UA-provided values in corresponding Via header.
>
>Please let me know if there are work in progress on this, so that
>I will not have to reinvent the wheel.
>
>Thanks!
>
>-Maxim
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--
Jiri Kuthan            http://iptel.org/~jiri/