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

Wed Nov 4 15:20:36 PST 2015

Hi,

You should be able to just send the candidates earlier and ignore the
signal if you think the timeout is too long.

Olivier

On Wed, 2015-11-04 at 07:00 -0800, Tom Chen wrote:
> Olivier:
> 
> I enabled glib debugging and see there are lots of retransmission
> timeout as there is a network interface that is connected to intranet
> and can not access external STUN server:
> 
> (process:4472): libnice-stun-DEBUG: STUN transaction retransmitted
> (timeout 396ms).
> (process:4472): libnice-stun-DEBUG: STUN transaction retransmitted
> (timeout 397ms).
> (process:4472): libnice-stun-DEBUG: STUN transaction retransmitted
> (timeout 793ms).
> (process:4472): libnice-stun-DEBUG: STUN transaction retransmitted
> (timeout 1589ms).
> . . . . .
> 
> I am wondering if there is a way to shorten or limit the re
> transmission? 3 second can be too long for voip phone communication
> setup as the remote client may close the session if it does not
> receive response soon enough.
> 
> Tom
> 
> > From: olivier.crete at collabora.com
> > To: chentom60 at hotmail.com; felixschlitter at gmail.com; nice at lists.fre
> edesktop.org
> > Date: Fri, 30 Oct 2015 16:18:21 -0400
> > Subject: Re: [libnice] why it takes so long (3 second) to get Local
> candidates?
> > 
> > Hi,
> > 
> > There is a signal for new candidates also that will give you the
> > candidates as they are discovered.
> > 
> > Olivier
> > 
> > On Thu, 2015-10-15 at 11:23 -0700, Tom Chen wrote:
> > > Olivier,
> > > 
> > > The delay is in waiting for candidates gathering done signal not
> in
> > > waiting for component state changed. If i don't wait for the
> > > candidates gathering done signal, then the
> > > nice_agent_get_local_candidates( ) will always return Null, thus
> no
> > > candidate.
> > > 
> > > Tom
> > > 
> > > > From: olivier.crete at collabora.com
> > > > To: felixschlitter at gmail.com; nice at lists.freedesktop.org
> > > > Date: Thu, 15 Oct 2015 12:01:43 +0100
> > > > Subject: Re: [libnice] why it takes so long (3 second) to get
> Local
> > > candidates?
> > > > 
> > > > Hello,
> > > > 
> > > > libnice will do a STUN query from every local interface, in
> case
> > > you
> > > > have a multi-homed device, so if some of them are not Internet
> > > > connected, then it waits for all of them to timeout. You can
> just
> > > > ignore the state change and start sending candidates earlier if
> the
> > > > delay is unacceptable for your application.
> > > > 
> > > > Olivier
> > > > 
> > > > On Thu, 2015-10-15 at 18:25 +1300, Felix Schlitter wrote:
> > > > > 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.
> > > > > 
> > > > > On Thu, Oct 15, 2015 at 6:01 PM, tom chen <chentom60 at hotmail.
> com>
> > > > > wrote:
> > > > > > 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
> > > > > > 
> > > > > > 
> > > > > > 
> > > > > > 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.
> > > > > > 
> > > > > > _______________________________________________
> > > > > > nice mailing list
> > > > > > nice at lists.freedesktop.org
> > > > > > http://lists.freedesktop.org/mailman/listinfo/nice
> > > > > > 
> > > > > _______________________________________________
> > > > > nice mailing list
> > > > > nice at lists.freedesktop.org
> > > > > http://lists.freedesktop.org/mailman/listinfo/nice
> > > > -- 
> > > > Olivier Crête
> > > > olivier.crete at collabora.com
> > > > 
> > > > 
> > > > _______________________________________________
> > > > nice mailing list
> > > > nice at lists.freedesktop.org
> > > > http://lists.freedesktop.org/mailman/listinfo/nice
> > -- 
> > Olivier Crête
> > olivier.crete at collabora.com
> > 
> > 
> > _______________________________________________
> > nice mailing list
> > nice at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/nice
-- 
Olivier Crête
olivier.crete at collabora.com