Re: reuse callID by proxy

Hi, all

About the Proxy, my problem is that I want to host multiple Proxy
applications above same SIP Stack, what happens:

mes0 - Proxy1 -mes1- Proxy2 - mes2 - Proxy2 - mes3 -> out
----------------------------------------------------------
		JAIN SIP Stack

mes1,2 are sending back to same stack (e.g to localhost:5060), three
proxy application will be triggert in turn.  All 4 messages have same
from-tag/to-tag/CallID, so:

1. How to implement a Proxy? So I can clone a message and send it on a
ClientTransaction. Is there 1 or 2 dialog? I think only 1, for the
dialog ID is same (callid+fromtag, to tag is null here),
getNewClientTransaction will copy the dialog also.


2. The CT and ST have also the same cloned branchID, so could it be a
problem?


I am thinking build a layer between Stack and applications, but seemed
this layer should implement all the SIP state machine, simulating a real
SIP stack:(((

urs Lebing






On Fri, 2006-09-29 at 14:53 +0200, Jeroen van Bemmel wrote:
> Lebing,
> 
> If you are implementing a 'normal' proxy, the Call-ID needs to remain the 
> same. If you are implementing a B2BUA, it should be changed. The S-CSCF 
> won't care either way, as it cannot tell whether it was changed or not.
> 
> Regards,
> 
> Jeroen
> 
> ----- Original Message ----- 
> From: "Lebing Xie" <[email protected]>
> To: "sip mailing" <[email protected]>
> Sent: Wednesday, September 27, 2006 1:12 PM
> Subject: [nist-sip] reuse callID by proxy
> 
> 
> > Hallo,
> >
> > I am working on a sip proxy based on JAIN Stack 1.2, can the cloned and
> > proxyed initial request use the same call-id as the originating one? I
> > do not think it can and should not, for a proxy is implemented as a
> > B2BUA(or not?)
> >
> > But if other parties on single path (e.g S-CSCF) need to check the
> > callID for some kind of business logic, a changed callid could break it.
> > So any idea about it?
> >
> > urs Lebing
> > _______________________________________________
> > nist-sip mailing list
> > [email protected]
> > http://www-x.antd.nist.gov/mailman/listinfo/nist-sip 
>