<div dir="ltr">I found that it can take a long time if I leave libnice to figure out my local interfaces. If I tell which local address I want to use, it's a lot faster. But that may have been because it tried to use a local interface that had no internet connection. Maybe see if `nice_agent_add_local_address` does anything for you. <div class="gmail_extra"> <div class="gmail_quote">On Thu, Oct 15, 2015 at 6:01 PM, tom chen <<a href="mailto:chentom60@hotmail.com" target="_blank">chentom60@hotmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div lang="EN-US" style="PADDING-TOP:15px;PADDING-LEFT:10px;PADDING-RIGHT:10px" link="#0563c1" vlink="#954f72" name="Compose message area"> <div>Hello,</div> <div> I am using an external public STUN server, <a href="http://stun.l.google.com" target="_blank">stun.l.google.com</a>(74.125.194.127), port: 19302, to try /examples/simple-example.c. simple-example can get its public IP as expected from this STUN server, so the public STUN server really works. However, I notice that, somehow, it takes around 3 second to get local candidate list. Any idea why so long? Then I installed a local STUN server in our intranet, still has same delay. I am wondering if there is anything waiting for some events during the gathering but always timeout? Tom tao@ubuntu:~/workspace/libnice-0.1.13/examples$ ./simple-example 1 74.125.194.127 19302 Copy this line to remote client: vPRk owHFru8Z6Dx8hj9TKel7Zl 1,<a href="tel:2013266431" value="+12013266431" target="_blank">2013266431</a>,fe80::20c:29ff:fe34:d0c8,42411,host 2,1019216383,fe80::20c:29ff:fe34:d0c8,0,host 3,1015022079,fe80::20c:29ff:fe34:d0c8,50240,host 4,<a href="tel:2013266431" value="+12013266431" target="_blank">2013266431</a>,fe80::20c:29ff:fe34:d0be,51731,host 5,1019216383,fe80::20c:29ff:fe34:d0be,0,host 6,1015022079,fe80::20c:29ff:fe34:d0be,43916,host 7,<a href="tel:2013266431" value="+12013266431" target="_blank">2013266431</a>,fe80::20c:29ff:fe34:d0b4,35004,host 8,1019216383,fe80::20c:29ff:fe34:d0b4,0,host 9,1015022079,fe80::20c:29ff:fe34:d0b4,51142,host 10,<a href="tel:2013266431" value="+12013266431" target="_blank">2013266431</a>,192.168.0.60,33635,host 11,1019216383,192.168.0.60,0,host 12,1015022079,192.168.0.60,51301,host 13,<a href="tel:2013266431" value="+12013266431" target="_blank">2013266431</a>,172.16.1.129,41734,host 14,1019216383,172.16.1.129,0,host 15,1015022079,172.16.1.129,46629,host 16,<a href="tel:2013266431" value="+12013266431" target="_blank">2013266431</a>,10.113.54.60,41481,host 17,1019216383,10.113.54.60,0,host 18,1015022079,10.113.54.60,33328,host 19,1677722111,204.96.168.3,41481,srflx ç Public IP candidates 20,847249919,204.96.168.3,0,srflx 21,843055615,204.96.168.3,33328,srflx Enter remote data (single line, no wrapping): > ^C</div> <hr> Statement Of Confidentiality: This electronic message transmission, and all attachments, contains information from Extron Electronics which is confidential and privileged. The information is for the exclusive viewing or use of the intended recipient. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited. If you have received this electronic transmission in error, please notify the sender immediately by a "reply to sender only" message and destroy all electronic and hard copies of the communication, including attachments. </div> _______________________________________________ nice mailing list <a href="mailto:nice@lists.freedesktop.org">nice@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/nice" rel="noreferrer" target="_blank">http://lists.freedesktop.org/mailman/listinfo/nice</a> </blockquote></div> </div></div>