[Devel] t_uac_dlg with nated SIP user agent

[Bogdan-Andrei Iancu]

Hi Juha,

I agree on this - the dst URI must be interpreted as an OBP and used for 
the entire dialog. The correct behaviour is to sent ACK to same OPB as 
the INVITE.

regards,
bogdan

Juha Heinanen wrote:

>if a sip ua is behind nat, uac fifo accepts the actual destination uri
>on the fourth line of the request:
>
>	:t_uac:[file] EOL
>	method EOL
>	r-uri EOL 
>	dst EOL 	// ("." if no outbound server used
>        ...
>
>and sends the request to that uri instead of the r-uri on the previous
>line.
>
>if the request happens to be invite, t_uac_dlg needs to send ack after
>receiving 200 ok from the sip ua.  that ack, however, is NOT sent to dst
>uri, but according to contact uri of 200 ok.
>
>in order for that to work, 200 ok should be either processed by a
>t_on_reply block or t_uac should also send the ack to dst uri (if not
>empty) instead of contact uri.
>
>so the options are either to somehow pass t_on_reply block number to
>t_uac_dialog via the fifo request or modify t_uac so that also ack gets
>sent to dst uri (if present).  i personally would prefer the latter
>choice.
>
>-- juha
>
>
>
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