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<p class="MsoNormal">The INVITE has no port assigned in ruri, so I assume it is using the default port of 5060; the ACK does have 5060 in the ruri. Even if a new connection is created shouldn’t it be using the listen tcp port since I have tcp_reuse_port=yes?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you!<o:p></o:p></p>
<p class="MsoNormal"><a name="_MailEndCompose"><o:p> </o:p></a></p>
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<p class="MsoNormal"><b>From:</b> sr-users [mailto:sr-users-bounces@lists.kamailio.org]
<b>On Behalf Of </b>Federico Cabiddu<br>
<b>Sent:</b> Friday, May 18, 2018 8:49 AM<br>
<b>To:</b> Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org><br>
<b>Subject:</b> Re: [SR-Users] Transport issue thought<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Can you print the logs when it tries to send the ACK?<o:p></o:p></p>
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<p class="MsoNormal">Check also that the ACK ruri contains the same destination port which was used for the INVITE, otherwise a new connection will be created.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best regards,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Federico<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Fri, May 18, 2018 at 2:31 PM, Wilkins, Steve <<a href="mailto:swwilkins@mitre.org" target="_blank">swwilkins@mitre.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thank you Alex and Federico,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I verified, and SO_REUSEPORT is defined on my OS. I am using Kamailio 5.2 and I set ‘tcp_reuse_port=yes;’ and $fs; this has been to no avail as ‘ACK’s’ are still using the high
port number randomly assigned by Kamailio.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thank you all for sharing your knowledge!<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a name="m_-8244761320131250806__MailEndCompose"> </a><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>From:</b> sr-users [mailto:<a href="mailto:sr-users-bounces@lists.kamailio.org" target="_blank">sr-users-bounces@lists.kamailio.org</a>]
<b>On Behalf Of </b>Federico Cabiddu<br>
<b>Sent:</b> Friday, May 18, 2018 12:57 AM<br>
<b>To:</b> Kamailio (SER) - Users Mailing List <<a href="mailto:sr-users@lists.kamailio.org" target="_blank">sr-users@lists.kamailio.org</a>><br>
<b>Subject:</b> Re: [SR-Users] Transport issue thought<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">You are right Alex, Linux kernel didn't support SO_REUSEPORT, which allows a socket to be used as source for a tcp connection while is already bound, until version 3.9.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Kamailio's parameter tcp_reuse_port, if enabled and your OS has support for SO_REUSEPORT (so not only Linux but FreeBSD, OSX and others), allows you to use force_send_socket (or
$fs) to send messages from a TCP port kamailio is listening to.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Cheers,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Federico<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Fri, May 18, 2018 at 12:28 AM, Alex Balashov <<a href="mailto:abalashov@evaristesys.com" target="_blank">abalashov@evaristesys.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">When an outgoing TCP connection is opened, either a port can be<br>
explicitly bound, or it is auto-assigned by the OS's networking stack. I<br>
believe Kamailio does the latter and does not offer options to constrain<br>
the range. If it does, I'm not aware of any apart from this one:<br>
<br>
<a href="https://www.kamailio.org/wiki/cookbooks/5.1.x/core#tcp_reuse_port" target="_blank">https://www.kamailio.org/wiki/cookbooks/5.1.x/core#tcp_reuse_port</a><br>
<br>
Not sure if it would help in this case, you'd have to give it a try.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><br>
On Thu, May 17, 2018 at 10:21:34PM +0000, Wilkins, Steve wrote:<br>
<br>
> It appears that the bottom line of my TCP transport not working is that Kamailio is randomly assigning large port numbers to send the TCP traffic out on.<br>
> I am not able to randomly open high ports for this purpose. Is there a way to tell Kamailio to only use specific ports for this. I have tried using<br>
> force_send_socket() with Kamailio' s IP, and the port I want to send out on, but this did not work either. Does this sound like I am on the right track?<br>
> <br>
> Thank you,<br>
> -<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">> _______________________________________________<br>
> Kamailio (SER) - Users Mailing List<br>
> <a href="mailto:sr-users@lists.kamailio.org" target="_blank">sr-users@lists.kamailio.org</a><br>
> <a href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users" target="_blank">
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a><br>
<span style="color:#888888"><br>
<br>
<span class="m-8244761320131250806hoenzb">-- </span><br>
<span class="m-8244761320131250806hoenzb">Alex Balashov | Principal | Evariste Systems LLC</span><br>
<br>
<span class="m-8244761320131250806hoenzb">Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
</span><br>
<span class="m-8244761320131250806hoenzb">Web: <a href="http://www.evaristesys.com/" target="_blank">
http://www.evaristesys.com/</a>, <a href="http://www.csrpswitch.com/" target="_blank">
http://www.csrpswitch.com/</a></span><br>
<br>
<span class="m-8244761320131250806hoenzb">_______________________________________________</span><br>
<span class="m-8244761320131250806hoenzb">Kamailio (SER) - Users Mailing List</span><br>
<span class="m-8244761320131250806hoenzb"><a href="mailto:sr-users@lists.kamailio.org" target="_blank">sr-users@lists.kamailio.org</a></span><br>
<span class="m-8244761320131250806hoenzb"><a href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users" target="_blank">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a></span></span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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_______________________________________________<br>
Kamailio (SER) - Users Mailing List<br>
<a href="mailto:sr-users@lists.kamailio.org">sr-users@lists.kamailio.org</a><br>
<a href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users" target="_blank">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a><o:p></o:p></p>
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