Re: Question about out-of-order requests

Hi Ranga (glad to see you back in action),

Section 12.2.2 of 3261 indicates that out-of-order requests (in-dialog
ones, anyway) should be responded to with a "500 Server Internal Error"
response..

In my case, I'm not issuing requests out of order, but I do occasionally
receive them :)

The result is sometimes a dropped subscription (SUBSCRIBE/NOTIFY) ..


On Fri, 2006-03-03 at 14:19 -0500, M. Ranganathan wrote:
> Hello,
> 
> 
> If you are using a Dialog for the request ( jsip now allows you to 
> optionally turn off automatic dialog support), you will only see 
> increasing sequence numbers inside a dialog. That is the second request 
> (with lower CSeq) within the same dialog will be dropped. If you want to 
> control your own dialog layer, you will (assuming no bugs) see all 
> requests regardless of sequence number.
> 
> Your user agent should never issue in dialog requests out of sequence 
> :-) so the problem may be on the sending end.
> 
> Regards
> 
> 
> Ranga
> 
> 
> David Stuart wrote:
> 
> >Hello,
> >
> >If two in-dialog requests (for sake of argument, let's say non-INVITE
> >requests) are received out of order- meaning the higher CSeq arrives
> >first- will the NIST sip stack still notify the application layer of the
> >arrival of the late request with lower CSeq?
> >
> >If not, how will it respond to the late request?
> >
> >Dave
> >  
> >
> 
> 
Dave
-- 
David Stuart, SIPquest
Email: dave (at) sipquest (dot) com
Phone: 254-8886 x234  Web: http://www.sipquest.com/
Address: 300 - 350 Terry Fox Drive, Kanata Ontario, K2K 2P5