[libnice] why it takes so long (3 second) to get Local candidates?

[tom chen]

Hello,
 

I am using an external public STUN server, stun.l.google.com(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 at ubuntu:~/workspace/libnice-0.1.13/examples$ ./simple-example 1 74.125.194.127 19302

Copy this line to remote client:

 

  vPRk owHFru8Z6Dx8hj9TKel7Zl 

1,2013266431,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 

4,2013266431,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 

7,2013266431,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 

10,2013266431,192.168.0.60,33635,host 

11,1019216383,192.168.0.60,0,host 

12,1015022079,192.168.0.60,51301,host 

13,2013266431,172.16.1.129,41734,host 

14,1019216383,172.16.1.129,0,host 

15,1015022079,172.16.1.129,46629,host 

16,2013266431,10.113.54.60,41481,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



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