Hi,
>Is the other scenario raised by Paul below?
>
> -> INVITE
> <- 180rel
> -> PRACK
> <- 401
>
>And are there any other
cases?IMO, only prack with new offer could cause this
problem.
A SIP
request can be rejected e.g. because the UAS is overloaded.
I
don't we can assume that a PRACK will never be rejected, and as long as it may
be rejected we need to know how to handle it.
>Also another question:
>
>Is the flows below valid according to recent arguments?
>
> UAC UAS
> |----invite(SDP)--->|
> |<--- 183(SDP)------|
> |-----prack(SDP)--->|
> |<--- 200(SDP)------|
>
> flow
1
Assuming the
200 is the PRACK response, yes.
>UAC UAS
> |----invite-------->|
> |<--- 183-----------|
> |-----prack(SDP)--->|
> |<--- 200(SDP)------|
>
> flow 2
Not
valid. If the INVITE does not contain SDP, a reliable answer must contain SDP.
We are currently discussing whether the FIRST reliable response must contain
SDP, or whether that rule can be related. But, that is a separate
thread.
Regards,
Christer
_______________________________________________ Sipping mailing list https://www.ietf.org/mailman/listinfo/sipping This list is for NEW development of the application of SIP Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip Use sip@xxxxxxxx for new developments of core SIP
