On Wednesday 09 March 2005 02:17, Jiri Kuthan wrote:
At 11:04 PM 3/8/2005, Nils Ohlmeier wrote:
Both UA's have to support the Session-Timer draft, otherwise the inserted Session-Expires Header will simply be ignored and you will never see any re-INVITE's. But if both UA's support the Session-Timer they should normaly agree on using automatically by looking at the Supported header. So in my opinion there is no extra value in adding a Session-Expires header to a request at a proxy.
That's actually not correct. It is sufficient in one UA supports ST. It is up to proxy server to handle the case correctly. We do that and there are reasonable use cases.
I did not wanted to write down this special case, but I feared that someone will come up with it :-) But in this special case you will also have to watch out for the replies, if they contain a Session-Expires header. The draft gives a fairly good overview what a new SER module would have to do ;-) (although it should also be doable in the script itself).
Greetings Nils