Re: [Sip] SIP Dialog Match

["Karunesh Sharma" <Karunesh.Sharma at globallogic.com>]

Dale:

Please see following trace

172.16.31.30 -> 10.0.4.6     SIP/SDP Request: INVITE
sip:23235556 at 10.0.4.6, with session description
192.168.4.67 -> 172.16.31.30 SIP Status: 100 Trying
192.168.4.67 -> 172.16.31.30 SIP/SDP Status: 183 Session Progress, with
session description
172.16.31.30 -> 192.168.4.67 SIP Request: PRACK
sip:23235556 at 192.168.4.67:5060
192.168.4.67 -> 172.16.31.30 SIP Status: 200 OK
192.168.4.67 -> 172.16.31.30 SIP/SDP Status: 200 OK, with session
description
172.16.31.30 -> 192.168.4.67 SIP Request: ACK
sip:23235556 at 192.168.4.67:5060
192.168.4.67 -> 172.16.31.30 SIP Request: BYE
sip:24098955 at 172.16.31.30:5060

172.16.31.30 (read as 'A') sent INVITE to 10.0.4.6 (read as 'B'). But
somehow 192.168.4.67 (read as 'C') responds. Now 'A' knows nothing about
'C', but still based on SIP dialog identifiers 'A' accepts that.

So is there any way to challenge or deny such rouge responses?

I was reading one draft
(http://ietfreport.isoc.org/idref/draft-cao-sip-response-identity/) but
that is expired.

K$
_______________________


-----Original Message-----
From: Dale Worley [mailto:dworley at nortel.com] 
Sent: Monday, August 03, 2009 8:55 PM
To: Karunesh Sharma
Cc: aayush bhatnagar; sip at ietf.org
Subject: RE: [Sip] SIP Dialog Match

On Mon, 2009-08-03 at 20:49 +0530, Karunesh Sharma wrote:
> What about sending INVITE to 'B' & getting all responses (which
> includes provisional response 1xx) from 'C'?

I'm not sure what you mean.

Dale