DNS termination sending to multiple IP addresses in a single call

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Thank you!  Do you know what would be entailed in retrofitting the fix onto version 0.7.0?  (Yes, I know it's an old version, but it's what we're stuck with for the time being because of extensive modifications we made to the code.)

Moshe


-----Original Message-----
From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of Klaus Darilion
Sent: Thursday, April 29, 2010 3:14 PM
To: pjsip list
Subject: Re: DNS termination sending to multiple IP addresses in a single call

Hi!

This is/was a known problem, which should be solved:
http://trac.pjsip.org/repos/ticket/917

regards
klaus

Am 28.04.2010 22:53, schrieb Moshe Matitya:
> We are running a modified version of the stateful_proxy sample
> application that was distributed with PJSIP 0.7.0.
>
> We are experiencing a problem involving DNS-based terminators: An INVITE
> is sent to a particular IP address, and a 100 TRYING and 183 SESSION
> PROGRESS are received from that same address. However, when we send a
> CANCEL, it gets sent to a different IP address.
>
> Example:
>
> A call is sent to bvxdnssrv.borderproxy.com which is initially defined
> as 64.158.162.78. The INVITE is sent to 64.158.162.78, the 100 TRYING is
> received from there, and the 183 SESSION PROGRESS is received from there
> as well. However, when we send a CANCEL, it is to 64.156.174.78.
>
> 64.158.162.78 is part of the srv1 record, and 64.156.174.78 is part of
> the srv2 record.
>
> Is the proxy performing a fresh DNS lookup in a situation when we need
> to send a CANCEL before we have received a 200 OK?
>
> Is this a known problem? How it can be fixed?
>
> Also, do there exist any other scenarios in which DNS termination can
> result in messages from the same call getting sent to multiple IP addresses?
>
> Thank you,
>
> Moshe Z. Matitya
>
>
>
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