<div dir="ltr"><div>Hi Bogdan,</div><div><br></div><div>Let's say Bob reinvites Alice to T.38 through my proxy. My proxy declines the reinvite. That transaction has completed and Bob has incremented his CSeq number. Now, if Bob sends another in-dialog request (such as a BYE), the CSeq is one higher than Alice is expecting. That's not a problem? Alice won't reply with a 400?</div>
<div><br></div><div class="gmail_extra"><div><div dir="ltr"><div><br></div><div>- Jeff</div><div><br></div></div></div>
<br><br><div class="gmail_quote">On Mon, Mar 17, 2014 at 11:24 AM, Bogdan-Andrei Iancu <span dir="ltr"><<a href="mailto:bogdan@opensips.org" target="_blank">bogdan@opensips.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div><tt>Hi Jeff,<br>
<br>
This is a false problem - you can simply decline the re-INVITE
without breaking anything - each side has its own cseq number,
and they are independently increased when a party is generating
a new requests.<br>
<br>
So, just decline it and that's it !<br>
<br>
Regards,<br>
</tt>
<pre cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a href="http://www.opensips-solutions.com" target="_blank">http://www.opensips-solutions.com</a></pre><div><div>
On 11.03.2014 19:42, Jeff Pyle wrote:<br>
</div></div></div><div><div>
<blockquote type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div>
<div dir="ltr">
<div>Hi Alexander,</div>
<div><br>
</div>
<div>To detect the "image" session in the SDP, you are
thinking the same way that I am. The problem I see is
how to actually reject the re-INVITE. If I were to do
something like a sl_send_reply("488", "Not Acceptable
Here"), that would work in the moment, but the CSeq
values would be increased by one on side compared to the
other. That sounds to me like a recipe for problems in
future in-dialog transactions (like BYE).</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>- Jeff</div>
<div><br>
</div>
<div>
<br>
</div>
</div>
</div>
<br>
<br>
<div class="gmail_quote">On Tue, Mar 11, 2014 at 12:58 PM,
Alexander Mustafin <span dir="ltr"><<a href="mailto:mustafin.aleksandr@gmail.com" target="_blank">mustafin.aleksandr@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word">Hi, Jeff.
<div><br>
</div>
<div>Maybe stream_exists(regexp) in sipmsgops module
will be useful for you.
<div>
<br>
</div>
<div>
<div style="text-indent:0px;letter-spacing:normal;font-variant:normal;text-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:normal;text-transform:none;white-space:normal;font-family:Helvetica;word-wrap:break-word;word-spacing:0px">
<div>Best regards,</div>
<div>Alexander Mustafin</div>
<div><a href="mailto:mustafin.aleksandr@gmail.com" target="_blank">mustafin.aleksandr@gmail.com</a></div>
<div><br>
</div>
</div>
<br>
<br>
</div>
<br>
<div>
<div>11 марта 2014 г., в 20:07, Jeff Pyle <<a href="mailto:jpyle@fidelityvoice.com" target="_blank">jpyle@fidelityvoice.com</a>>
написал(а):</div>
<br>
<blockquote type="cite">
<div>
<div>
<div dir="ltr">
<div>
<div dir="ltr">
<div>Hello,</div>
<div><br>
</div>
<div>Is there anything I can do at the
proxy level to prevent a dialog from
reinviting to to T.38? I think I
could detect the T.38 attributes
easily enough and respond with a 488,
although I'm concerned the CSeq values
would be out of sequence for the next
transaction that did make it through
the proxy to the far end. That could
cause a problem, no?</div>
<div><br>
</div>
<div>Is this something that requires a
B2BUA? Is it possible from within the
OpenSIPS B2B modules to do SDP
inspection of any sort?</div>
<div><br>
</div>
<div><br>
</div>
<div>- Jeff</div>
<div><br>
</div>
</div>
</div>
</div>
</div>
</div>
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