[SIPForum-discussion] Need suggestion

[Santosh Iyer]

Ideally you would want to have a unique branch id. The branch id is used to identify a unique transaction If the First options message is answered with a 200 OK and then the second options message is sent then you might not see any issues because the first transaction is complete and the entity might have cleared the transaction.      But if the first options hasnt received a response and the transaction is ongoing the second OPTIONS would not be handled properly. For instance the second options might be dropped because it is associated with an ongoing transaction.
Santosh

--- On Sun, 12/23/12, SYED IQBAL Ali <s.iqbalali2005 at gmail.com> wrote:

From: SYED IQBAL Ali <s.iqbalali2005 at gmail.com>
Subject: [SIPForum-discussion] Need suggestion
To: discussion at sipforum.org
Date: Sunday, December 23, 2012, 1:49 AM

Hi i have a question about
branch parameter in Via header for below scenarios. 

 

 

Scenarios:

1)

OPTIONS
sip:user1 at Server_IP SIP/2.0

Via:SIP/2.0/UDP
Client_IP:9080;branch=z9hG4bKABC

Call-ID:
Call_ID1 at Client_IP:9080

From:
<sip:user1 at Client_IP:9080>;tag=1000000-0-803298131-9080

To:
<sip:user1 at Server_IP:5060>

CSeq: 1 OPTIONS

Content-Length: 0

Contact:
<sip:user1 at Client_IP:9080>

Max-Forwards: 70

 

====================

2)

OPTIONS
sip:user2 at Server_IP SIP/2.0

Via:SIP/2.0/UDP
Client_IP:9080;branch=z9hG4bKABC

Call-ID:
Call_ID2 at Client_IP:9080

From:
<sip:user2 at Client_IP:9080>;tag=1000000-0-803298131-9080

To:
<sip:user2 at Server_IP:5060>

CSeq: 2 OPTIONS

Content-Length: 0

Contact:
<sip:user1 at Client_IP:9080>

Max-Forwards: 70

 

1) My question is can we
use same branch parameter in both OPTIONS requests having different call ids or
not?

 

-Call ids are different
for both request.

-SIP URI is different for
both call legs.

- To and from headers are
different for both scenarios.

-Cseq
are different in both cases.
-- 
SYED IQBAL ALI

s.iqbalali2005 at gmail.com

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