[SIPForum-discussion] Which should be the correct behaviour?

[sreekant nair]

Hello Andrea, 

My thoughts on the two scenarios
Scenario 1: It seems OK provided you got a 100 trying for the INVITE. Yes, the phone should ignore the 200OK (D1) since the transaction was successfully canceled. However, the proxy should not have sent this 200OK if it responded with the 487 - terminating the INVITE request. (except if it received the CANCEL while waiting for the ACK to the 200OK)

Scenario 2: - Doesn't look right. From what you mention, it looks like the CANCEL made it to the proxy after the response to the INVITE was sent out. There should be some response to the CANCEL request  at least a 481. 

Regards
Sreekant Nair

----- Original Message ----
From: Andrea Puddu <androjoker at hotmail.com>
To: Herve Jourdain <herve.jourdain at mstarsemi.com>; prasanna c <c_prasanna_c at hotmail.com>; discussion at sipforum.org
Sent: Tuesday, April 1, 2008 9:53:05 AM
Subject: Re: [SIPForum-discussion] Which should be the correct behaviour?


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Thanks everybody very much.
Herve, you are correct.

Furthermore, with one kind of phone I am experiencing this behaviour:

Scenario
1:SIP
phone sends an INVITE (D1)
SIP
phone sends a CANCEL (C1)
SIP
phone receives C1 200 OK
SIP phone receives 487 Request terminated
SIP phone sends ACK
 
                       SIP
phone receives D1 200 OK

                        SIP phone ignore the message

Scenario
2:SIP
phone sends an INVITE (D1)
SIP
phone sends a CANCEL (C1)
SIP
phone DOES NOT receive C1 200 OK
                        SIPphone receives D1 200 OK
 
                       SIP phone sends ack and keeps sending some CANCEL




Do you think they are correct?

Thanks,

Andrea




From: herve.jourdain at mstarsemi.com
To: c_prasanna_c at hotmail.com; androjoker at hotmail.com; discussion at sipforum.org
Subject: RE: [SIPForum-discussion] Which should be the correct behaviour?
Date: Tue, 1 Apr 2008 14:18:23 +0200

  
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Hi,
 
I would only add that it’s
likely that SIP phone receives D1 487 Request Terminated…
 
Regards,
 
Hervé
 

From:discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of prasanna c
Sent: vendredi 28 mars 2008 13:19
To: Andrea Puddu;discussion at sipforum.org
Subject: Re: [SIPForum-discussion]Which should be the correct behaviour?

 
Both are not correct
scenario.  Sip phone MUST not send CANCEL without receiving any
Provisional response response. If CANCEL is sent after receiving any
provisional response, then Scenario 1 is correct.

From: androjoker at hotmail.com
To: discussion at sipforum.org
Date: Fri, 28 Mar 2008 11:10:21 +0000
Subject: [SIPForum-discussion] Which should be the correct behaviour?
 
Hello, 

does anybody know which should be the correct phone behaviour in these twoscenarios?
-         
Scenario
1:
SIP
phone sends an INVITE (D1)
SIP
phone sends a CANCEL (C1)
SIP
phone receives C1 200 OK 
SIP
phone receives D1 200 OK 
 
-         
Scenario
2:
SIP
phone sends an INVITE (D1)
SIP
phone sends a CANCEL (C1)
SIP
phone DOES NOT receive C1 200 OK 
SIP
phone receives D1 200 OK
 
Thanks,
 
Andrea
 

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