[SIPForum-discussion] SIP Proxy Testing: INVITE server transa ction

[Eugene Mednikov]

Greetings, Vivek!
 
	Both invites are sent from the same channel. That's why there is a
problem.
 
Respectfully yours, Eugene Mednikov.
 
Software Engineer
Hermon Labs
972-4-6288001, 207
972-54-4520187
em at hermonlabs.com
www.hermonlabs.com

-----Original Message-----
From: vivek krishna [mailto:vivekkrishna_s at yahoo.com] 
Sent: Thursday, May 10, 2007 7:33 AM
To: Eugene Mednikov
Subject: Re: [SIPForum-discussion] SIP Proxy Testing: INVITE server
transaction

Hello,
    If I understand your test scenario correctly, you are using two separate
telephones from which INVITE is sent(With or without authorisation).In that
case it does not matter what the Cseq value is for the INVITE from the
second equipment.As both the INVITE transactions are from different users,
Cseq can be independent of each other.The use of Cseq is just to maintain
the flow of messages inside a transaction in the correct order.

So if I have understood your scenario correctly, you can have Cseq as 3 or 4
or 5 (ir does not matter) for the INVITE request from second equipnment, but
from then on it must increment properly for each new request inside that
transaction/dialog.

Regards,
Vivek Krishna
--- Eugene Mednikov <em at HERMONLABS.com> wrote:

> Greetings!
>  
>     I'm working on SIP Proxy testing according to ETSI TS 102 027 test 
> suite. There are several test cases that test INVITE server 
> transaction. For example test case SIP_CC_PR_TR_SE_V_006 description
> is: "Ensure that the IUT
> in a server INVITE Proceeding state, on receipt of an INVITE request, 
> including a Via header set with the same branch parameter and  sent-by 
> value in the topmost list value, repeats its last response." 
> Reference: 17.2.1 [1], 17.2.3 [1].
>     Basically this test connects to proxy as 2 telephones and sends 2 
> INVITEs from first phone to second phone one after another and checks 
> that response is the same. As I see response is 100 Trying. Problem 
> arises when authorization is enabled: how to work with CSeq counter?
>  
>     Without authorization message flow is simple:
> ---------------->        INVITE CSeq 3  (first
> invite)
> <----------------        100 CSeq 3
> ---------------->        INVITE CSeq 3  (second
> invite)
> <----------------        100 CSeq 3
>  
>     With authorization message flow is more complex:
>  
> Tester    Proxy
> ---------------->        INVITE CSeq 3  (first
> invite)
> <----------------        407 CSeq 3
> ---------------->        INVITE CSeq 4
> <----------------        100 CSeq 4
>  
> ---------------->        INVITE CSeq N  (second
> invite)
> <----------------        407 CSeq N
> ---------------->        INVITE CSeq N + 1
> <----------------        100 CSeq N + 1
>  
> Now there is the question: what N should be: 3, 4, 5?
> 
>  
> Respectfully yours, Eugene Mednikov.
>  
> Software Engineer
> Hermon Labs
> 972-4-6288001, 207
> 972-54-4520187
> em at hermonlabs.com
> <blocked::mailto:em at hermonlabs.com>
> www.hermonlabs.com
> <blocked::http://www.hermonlabs.com>
>  
> > _______________________________________________
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