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<div class="moz-cite-prefix"><tt>Hi Jeff,<br>
<br>
Alice expects just a higher cseq number, not an increment with 1
or any step...just higher than the prev one :)<br>
<br>
Regards,<br>
</tt>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
On 17.03.2014 17:52, Jeff Pyle wrote:<br>
</div>
<blockquote
cite="mid:CACYJG3Je_75Ar-Mn_7w3r+0=YUJFfX7sJZB5MZ46ELkcQhNeSQ@mail.gmail.com"
type="cite">
<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
moz-do-not-send="true" 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 moz-do-not-send="true" 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>
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<div>
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<blockquote type="cite">
<div dir="ltr">
<div class="gmail_extra">
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<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 moz-do-not-send="true"
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 moz-do-not-send="true"
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 moz-do-not-send="true"
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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