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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>I looked at the ESL C code and I *<b>THINK</b>* that I have to poll using the esl_recv_event_timed function (to look for the SESSION_HEARTBEAT event).<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:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Is there already a callback function that I can hook into to be <u>notified</u> of events? If not, at which frequency should I poll for events (sleep inbetween) based on anyones experience? I don’t like blocking code so I’m hoping there is already a callback function setup.<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:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Or is there some other way to handle this?<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:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> FreeSWITCH-users [mailto:freeswitch-users-bounces@lists.freeswitch.org] <b>On Behalf Of </b>Guillermo Ruiz Camauer<br><b>Sent:</b> Friday, November 12, 2021 8:31 AM<br><b>To:</b> FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org><br><b>Subject:</b> Re: [Freeswitch-users] ESL asynchronous use<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>There is a SESSION_HEARTBEAT event that you can monitor to see if FS has stopped responding. It also has a lot of other useful information.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Guillermo<o:p></o:p></p><div><h3 style='mso-margin-top-alt:7.5pt;margin-right:0in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt' id="gmail-EventList-SESSION_HEARTBEAT"><span style='font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#172B4D;letter-spacing:-.05pt'><o:p> </o:p></span></h3><pre style='margin-top:7.5pt'><span style='font-size:10.5pt;color:#172B4D'> <o:p></o:p></span></pre></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Thu, Nov 11, 2021 at 8:56 PM Telium Technical Support <<a href="mailto:support@telium.io">support@telium.io</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>No crash, just learning how to use the ESL. I strongly prefer async design, so wondering if connect and disconnect have some sort of success/failure callback.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Or is the only way to check success to send a command over the socket?</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Same with disconnect, do we need to wait for a send failure?</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Brian West [mailto:<a href="mailto:brian@freeswitch.com" target="_blank">brian@freeswitch.com</a>] <br><b>Sent:</b> Thursday, November 11, 2021 8:46 AM<br><b>To:</b> Telium Technical Support <<a href="mailto:support@telium.io" target="_blank">support@telium.io</a>><br><b>Cc:</b> FreeSWITCH Users Help <<a href="mailto:freeswitch-users@lists.freeswitch.org" target="_blank">freeswitch-users@lists.freeswitch.org</a>><br><b>Subject:</b> Re: [Freeswitch-users] ESL asynchronous use</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>If you have a crash you should perform a back trace and submit an issue on github.<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>/b<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Wed, Nov 10, 2021 at 7:50 PM Telium Technical Support <<a href="mailto:support@telium.io" target="_blank">support@telium.io</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I’m trying to figure out asynchronous use of the ESL (from C). If I call esl_connect_timeout with a timeout of 0, what happens if the connection is not made immediately? Is there some callback function indicating success/failure?<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'>If the esl connection is lost (FreeSwitch crashes), is there a callback function indicating the lost connection? Or do I need to issue a status/keepalive to ensure function succeeds?<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'>Looking a bit at the esl.c code I’m wondering if the above are synchronous only…(polling for status)<o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>_________________________________________________________________________<br><br>The FreeSWITCH project is sponsored by SignalWire <a href="https://signalwire.com" target="_blank">https://signalwire.com</a><br>Enhance your FreeSWITCH install with disruptive priced SMS and PSTN services.<br>Build your next product on our scalable cloud platform.<br><br>Join our online community to chat in real time <a href="https://signalwire.community" target="_blank">https://signalwire.community</a><br><br>Professional FreeSWITCH Services<br><a href="mailto:sales@freeswitch.com" target="_blank">sales@freeswitch.com</a><br><a href="https://freeswitch.com" target="_blank">https://freeswitch.com</a><br><br>Official FreeSWITCH Sites<br><a href="https://freeswitch.com/oss" target="_blank">https://freeswitch.com/oss</a><br><a href="https://freeswitch.org/confluence" target="_blank">https://freeswitch.org/confluence</a><br><a href="https://cluecon.com" target="_blank">https://cluecon.com</a><br><br>FreeSWITCH-users mailing list<br><a href="mailto:FreeSWITCH-users@lists.freeswitch.org" target="_blank">FreeSWITCH-users@lists.freeswitch.org</a><br><a href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users" target="_blank">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a><br>UNSUBSCRIBE:<a href="http://lists.freeswitch.org/mailman/options/freeswitch-users" target="_blank">http://lists.freeswitch.org/mailman/options/freeswitch-users</a><br><a href="https://freeswitch.com" target="_blank">https://freeswitch.com</a><o:p></o:p></p></blockquote></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><br clear=all><o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>-- <o:p></o:p></p><div><div><div><div><div><div><div><div><div><div><div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:9.5pt'> </span><o:p></o:p></p></div><div><p style='mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:4.5pt;margin-bottom:.0001pt'><span style='font-size:8.0pt;font-family:"Arial",sans-serif;color:black'>Brian West | Co-founder and Developer</span><o:p></o:p></p><p style='mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:4.5pt;margin-bottom:.0001pt'><span style='font-size:8.0pt;font-family:"Arial",sans-serif;color:black'>Need Commercial support? email <a href="mailto:sales@freeswitch.com" target="_blank">sales@freeswitch.com</a> </span><o:p></o:p></p><p style='mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:4.5pt;margin-bottom:.0001pt'><span style='font-size:8.0pt;font-family:"Arial",sans-serif;color:black'>FreeSWITCH Solutions | <a href="https://maps.google.com/?q=17345+Civic+Drive+%232531+Brookfield,+WI+53045&entry=gmail&source=g" target="_blank"><span style='color:#1155CC'>17345 Civic Drive #2531 Brookfield, WI 53045</span></a></span><o:p></o:p></p><p style='mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:4.5pt;margin-bottom:.0001pt'><span style='font-size:8.0pt;font-family:"Arial",sans-serif;color:black'>Email: </span><span style='font-size:8.0pt;font-family:"Arial",sans-serif;color:#1155CC'><a href="mailto:brian@freeswitch.com" target="_blank">brian@freeswitch.com</a></span><o:p></o:p></p><p style='mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:4.5pt;margin-bottom:.0001pt'><span style='font-size:8.0pt;font-family:"Arial",sans-serif;color:black'>Mobile: 918-424-9378</span><o:p></o:p></p><p style='mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:4.5pt;margin-bottom:.0001pt'><span style='font-size:8.0pt;font-family:"Arial",sans-serif;color:black'>Website: </span><span style='font-size:9.5pt;color:black'><a href="https://www.freeswitch.com/" target="_blank"><span style='font-size:8.0pt;font-family:"Arial",sans-serif;color:#1155CC'>https://www.FreeSWITCH.com</span></a></span><o:p></o:p></p><p style='margin:0in;margin-bottom:.0001pt'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><a href="https://www.facebook.com/freeswitch" target="_blank"><span style='border:solid windowtext 1.0pt;padding:0in;text-decoration:none'><img border=0 width=31 height=31 id="gmail-m_7037153301838114762_x005f_x0000_i1025" src="cid:image001.jpg@01D7D7EE.B3FA1BA0" alt="Image removed by sender. https://www.facebook.com/signalwireinc?src=email"></span></a></span><span style='font-size:9.0pt;font-family:"Tahoma",sans-serif;color:black'><a href="https://twitter.com/freeswitch" target="_blank"><span style='border:solid windowtext 1.0pt;padding:0in;text-decoration:none'><img border=0 width=31 height=31 id="gmail-m_7037153301838114762_x005f_x0000_i1026" src="cid:image001.jpg@01D7D7EE.B3FA1BA0" alt="Image removed by sender. https://twitter.com/freeswitch"></span></a></span><o:p></o:p></p></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><p class=MsoNormal>_________________________________________________________________________<br><br>The FreeSWITCH project is sponsored by SignalWire <a href="https://signalwire.com" target="_blank">https://signalwire.com</a><br>Enhance your FreeSWITCH install with disruptive priced SMS and PSTN services.<br>Build your next product on our scalable cloud platform.<br><br>Join our online community to chat in real time <a href="https://signalwire.community" target="_blank">https://signalwire.community</a><br><br>Professional FreeSWITCH Services<br><a href="mailto:sales@freeswitch.com" target="_blank">sales@freeswitch.com</a><br><a href="https://freeswitch.com" target="_blank">https://freeswitch.com</a><br><br>Official FreeSWITCH Sites<br><a href="https://freeswitch.com/oss" target="_blank">https://freeswitch.com/oss</a><br><a href="https://freeswitch.org/confluence" target="_blank">https://freeswitch.org/confluence</a><br><a href="https://cluecon.com" target="_blank">https://cluecon.com</a><br><br>FreeSWITCH-users mailing list<br><a href="mailto:FreeSWITCH-users@lists.freeswitch.org" target="_blank">FreeSWITCH-users@lists.freeswitch.org</a><br><a href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users" target="_blank">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a><br>UNSUBSCRIBE:<a href="http://lists.freeswitch.org/mailman/options/freeswitch-users" target="_blank">http://lists.freeswitch.org/mailman/options/freeswitch-users</a><br><a href="https://freeswitch.com" target="_blank">https://freeswitch.com</a><o:p></o:p></p></blockquote></div><p class=MsoNormal><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <o:p></o:p></p><div><p class=MsoNormal>Guillermo Ruiz Camauer<o:p></o:p></p></div></div></body></html>