Re: [reSIProcate-users] Expires field in INVITE request
The later.
thanks,
-r
On Apr 25, 2008, at 6:25 AM, Byron Campen wrote:
So you're worried about the UAS doing something broken with the
Expires value? Or are you maintaining that it would make code more
complicated, without actually reducing the burden on the TU?
Best regards,
Byron Campen
Hi Byron,
I think use of this feature is generally a bad idea and I would
push for it to be deprecated in a future version of the standard.
An application that is interested in setting this header would be
better off setting an application-level timer and canceling the
request.
If a UAS that receives this request ignores the Expires header,
nothing bad really happens. If the UAS sends a 2xx to the
request, the UAC should have code to just send a BYE.
thanks,
-rohan
On Apr 24, 2008, at 7:33 AM, Byron Campen wrote:
CCing to resip-devel:
Actually, the is UAC core behavior, so this sort of thing would
belong down in the stack, not DUM. I actually think that this
would be a good thing to implement. (Of course, we'd need to make
it configurable so repro wouldn't act on it; forwarding an INVITE
with an Expires shouldn't trigger timers and such, since that's
the UAC's job)
Anyone have a strong opinion on this?
Best regards,
Byron Campen
According to RFC 3261
The UAC MAY add an Expires header field (Section 20.19) to
limit the
validity of the invitation. If the time indicated in the
Expires
header field is reached and no final answer for the INVITE
has been
received, the UAC core SHOULD generate a CANCEL request for the
INVITE, as per Section 9.
As I far as I know resiprocate does not implement this behavior
so I have made changes to the library. So I added one more timer
- InviteExpires(see DumTimeout.hxx) that acts similar to
StaleCall timer.
I think that modifying library is not a good idea so, is there
any other way to limit call duration while it has not received
final answer? If no can you give any feedback on changes I have
made especially on possible incorrect interaction with existing
resiprocate code. I'm using resiprocate of version 1.1
Thanks in advance.
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