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<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>It didn’t break anything else for me in this final
configuration. This code is called right before (and encompasses) where I
normally called t_relay() (see below), which is only once place in my script,
in route[1]. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>--<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Jeff Kronlage<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Senior IT Engineer, Data102</span><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>102 South Tejon, Suite #1250</span><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Colorado Springs, CO 80903</span><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>(719) 387-0000 x 1335 direct</span><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>(719) 578-8844 fax<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>jeff@data102.com / <a href="http://www.data102.com">http://www.data102.com</a></span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
users-bounces@lists.opensips.org [mailto:users-bounces@lists.opensips.org] <b>On
Behalf Of </b>Brett Nemeroff<br>
<b>Sent:</b> Monday, October 05, 2009 11:56 AM<br>
<b>To:</b> OpenSIPS users mailling list<br>
<b>Subject:</b> Re: [OpenSIPS-Users] Re-invite problem -> 491 Request
Pending<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Jeff,<o:p></o:p></p>
<div>
<p class=MsoNormal>Thanks for your reply. Is this in the loose route? or.. ?
Does it break anything else? Bogdan, anyway you can explain what's going on
here? :)<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>-Brett<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal>On Mon, Oct 5, 2009 at 12:30 PM, Jeff Kronlage <<a
href="mailto:jeff@data102.com">jeff@data102.com</a>> wrote:<o:p></o:p></p>
<div>
<div>
<p><span style='font-size:11.0pt;color:#1F497D'>Brett,</span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'>I had this same exact problem.
The solution was a little clunky but sending the ACK out statelessly solves
the problem.</span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'>My code looks like:</span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'>
t_check_trans();</span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'>
if (is_method("ACK") && !t_check_trans()) {</span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'>
if (!forward()) sl_reply_error();</span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'>
exit;</span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'>
}</span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'>
if (!t_relay()) sl_reply_error();</span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'>I wish I could give a more
techie explanation on why this works – it was a hackjob answer for me.
Bogdan posted an answer perhaps a week ago that explained it a bit.</span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'>Cheers,</span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p><span style='font-size:10.0pt;color:#1F497D'>--</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;color:#1F497D'>Jeff Kronlage</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;color:#1F497D'>Senior IT Engineer, Data102</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;color:#1F497D'>102 South Tejon, Suite #1250</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;color:#1F497D'>Colorado Springs, CO 80903</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;color:#1F497D'>(719) 387-0000 x 1335 direct</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;color:#1F497D'>(719) 578-8844 fax</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;color:#1F497D'><a
href="mailto:jeff@data102.com" target="_blank">jeff@data102.com</a> / <a
href="http://www.data102.com" target="_blank">http://www.data102.com</a></span><o:p></o:p></p>
<p><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p><b><span style='font-size:10.0pt'>From:</span></b><span style='font-size:
10.0pt'> <a href="mailto:users-bounces@lists.opensips.org" target="_blank">users-bounces@lists.opensips.org</a>
[mailto:<a href="mailto:users-bounces@lists.opensips.org" target="_blank">users-bounces@lists.opensips.org</a>]
<b>On Behalf Of </b>Brett Nemeroff<br>
<b>Sent:</b> Monday, October 05, 2009 9:51 AM<br>
<b>To:</b> <a href="mailto:users@lists.opensips.org" target="_blank">users@lists.opensips.org</a><br>
<b>Subject:</b> [OpenSIPS-Users] Re-invite problem -> 491 Request Pending</span><o:p></o:p></p>
</div>
<div>
<div>
<p> <o:p></o:p></p>
<p>Hello All,<o:p></o:p></p>
<div>
<p>I'm not sure where the problem is.. it's either my switch, or it's the
customer's box.<o:p></o:p></p>
</div>
<div>
<p> <o:p></o:p></p>
</div>
<div>
<p>What's happening is the customer sends a call. As soon as the 200OK gets
back to them, they re-invite.. very fast. The reinvite occurs BEFORE the ACK
for the 200OK makes it back to the provider. Because of this, when the
RE-INVITE hits the provider they respond with "491 Request Pending",
in other words, I can't process a re-invite because the last INVITE hasn't send
me an ACK back yet. This happens over.. and over.. and over.<o:p></o:p></p>
</div>
<div>
<p> <o:p></o:p></p>
</div>
<div>
<p>What I'm wondering is if there is a timer I can adjust for this. Seems like
OpenSIPs should know that the transaction is in a state where there is a
PENDING ACK and it shouldn't process the RE-INVITE quite yet (Request Queued?).
Perhaps that isn't a normal function of a Proxy. So I guess I'm looking for
either a timer adjustment or a way to insert some sorta delay (sounds like a
bad idea) to allow the ACK to traverse.<o:p></o:p></p>
</div>
<div>
<p> <o:p></o:p></p>
</div>
<div>
<p>The numbers are VERY close.. the ACK actually arrives at
timestamp 12.757073, but the INVITE goes to the provider
at 12.755913. So in other words, if the RE-INVITE occured 0.001161 seconds
later, this wouldn't happen. Seems like there should be something to prevent
these events? (A properly working UAC perhaps?!)<o:p></o:p></p>
</div>
<div>
<p> <o:p></o:p></p>
</div>
<div>
<p>Any ideas?<o:p></o:p></p>
</div>
<div>
<p> <o:p></o:p></p>
</div>
<div>
<p>Thanks,<o:p></o:p></p>
</div>
<div>
<p>Brett<o:p></o:p></p>
</div>
<div>
<p> <o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><br>
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<a href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users"
target="_blank">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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