[SIPForum-discussion] Issue in Initiation/Termination of callwithDe-Registered User

Thu May 3 20:25:09 UTC 2007

Again. Go read 3261.

A proxy never, I repeat NEVER, routes on To or From. If you are  
writing code that does that, you are writing code that will fail in  
the field.

The case you are talking about is routing an in dialog message. The  
BYE got to the proxy because of a Route header (the proxy record-routed
the INVITE or you wouldn't be in this case - the BYE would go  
directly to A). The proxy routes the request to A based on the  
request URI of the
BYE (since there are no remaining Route headers).

If that doesn't make sense, go back and read the section on dialogs  
in RFC3261.

RjS

On May 2, 2007, at 11:49 PM, santosh patra wrote:

> Though A has been de-registered user and A is initiating INVITE for  
> session initiation, A can send his address in FROM header as well  
> as in Contact also...But here Problem is When B will try to intiate  
> BYE to A, At that time if it reoutes through stateful proxy then  
> Proxy will try to get the address of A (TO header), But Stateful  
> proxy couldn't get the address from Database and Bye could n't  
> reach to A, And Call leg willl be hanging.
>
> Santosh
>
> ----- Original Message ----
> From: William Prusty <williamp at TechMahindra.com>
> To: santosh patra <skp10_9559 at yahoo.co.in>; Srinivas .  
> <nsrinivas at TechMahindra.com>; discussion at sipforum.org
> Sent: Wednesday, 2 May, 2007 2:15:24 PM
> Subject: RE: [SIPForum-discussion] Issue in Initiation/Termination  
> of callwithDe-Registered User
>
> Suppose session is going between A & B. if  b wants to send BYE to  
> A in which address it will send BYE( bcz  A don’t possess any  
> CONTACT header field  as it has been deregistered)
>
>
>
>
> Plz answer
>
>
> From: discussion-bounces at sipforum.org [mailto:discussion- 
> bounces at sipforum.org] On Behalf Of santosh patra
> Sent: Wednesday, May 02, 2007 1:28 PM
> To: Srinivas .; discussion at sipforum.org
> Subject: Re: [SIPForum-discussion] Issue in Initiation/Termination  
> of callwithDe-Registered User
>
>
>
> Thanks for your comments..
>
> How about charging/billing will work in this scenario and who will  
> be charged and how?
> In this case can it be possible to terminate the call from  
> Registered user to Un-registered User, If Yes then How?
>
> Santosh
>
> ----- Original Message ----
> From: Srinivas . <nsrinivas at TechMahindra.com>
> To: santosh patra <skp10_9559 at yahoo.co.in>; discussion at sipforum.org
> Sent: Wednesday, 2 May, 2007 12:05:16 PM
> Subject: RE: [SIPForum-discussion] Issue in Initiation/Termination  
> of call withDe-Registered User
>
> Santhosh my comments inline.
>
>
>
> From: discussion-bounces at sipforum.org [mailto:discussion- 
> bounces at sipforum.org] On Behalf Of santosh patra
> Sent: Monday, April 30, 2007 8:08 PM
> To: discussion at sipforum.org
> Subject: [SIPForum-discussion] Issue in Initiation/Termination of  
> call withDe-Registered User
>
>
> Hello All
>
> I am facing problem in the following scenario...So the Scenario is,
>
> User A and B has registered in SIP server and expire header is 4  
> hour i.e. 14,600 seconds.
> User A has been deregistered with Expiry:0.
>
> case1:De-registered User A is trying to initiate a call to  
> registered User B and the call is getting success means User B is  
> getting the call and Media path has also been estabilshing, Is the  
> call should sucessful? If yes, then how?
>
> [Srinivas] Call should go because in SIP registration is used for  
> routing incoming SIP requests (INVITE or other request messages  
> coming to user A).
>
>                It has no role in authorizing outgoing request  
> (INVITE or other request messages going to user B).
>
>
> but in Case2: when User B is trying to call De-registered user A  
> then call is not successful and getting 4xx error response.
>
> [Srinivas] Call should fail, for the incoming call proxy authorizes  
> the incoming call. As the user A is deregistered call will fail.
>
>
> Here I am getting confused that when User A has deregistered from  
> Registrar then there is no information of User A in Registrar and  
> How User A is able to initiate a call with out registration?
>
> [Srinivas] Proxy will take care of call setup not registrar.  If  
> your invite carries information of User B
>
>
>
> But RFC-3261 doesn't talk about initiation and Termination of call  
> after deregistering the user.
>
> [Srinivas] Search for key word “no role in authorizing” in section  
> 4 of RFC 3261.
>
>
>
>
> If any RFC/standard says about such scenarios then please let me know.
>
> Please help me on this Scenario.
>
> Thanks in Advance
> Santosh
>
>
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