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Re: [Linphone-developers] two local linphone apps make modem crash


From: Liviu Andronic
Subject: Re: [Linphone-developers] two local linphone apps make modem crash
Date: Sun, 23 Aug 2015 16:35:23 +0200

Hi William,

On Sat, Aug 22, 2015 at 2:32 AM, William Hutchison
<address@hidden> wrote:
> Michael,
> Thanks a lot to you and to Russell Treleaven for his previous comments in
> the forum. Both of you pointed me in the right direction, to my great
> relief. I tried the test in other locations and none of them crashes. Since
> it's so limited -- and must be very limited in general since nobody else
> seems to experience it
>
I've experienced the exact same issue with Linphone crashing home
wifi, and I must admit it's confusing and frustrating.

In the latest iteration (it was worse with older versions), this
happens whichever the platform used (Linux, Android, iOS), but only
with certain SIP servers. I get no crash with sip.linphone.org, but I
always get crashes with sip.antisip.com. With iptel.org it's unclear:
sometimes crashes, sometimes not.

I suspect Linphone could be doing something to prevent this (it's
clearly somehow triggering this, as other SIP clients don't seem to
have the same effect), even if I agree that Linphone shouldn't be
capable of crashing a router and it's probably indicative of a bug in
the router itself. I've never bothered to report this here as it
seemed like a very obscure bug with no obvious explanation...

Regards,
Liviu


> -- I won't try to diagnose it further, just get a
> better modem. How great to have this kind of expert support!
>    Bill Hutchison
>
>
> On Fri, Aug 21, 2015 at 5:02 PM, Michael Richardson <address@hidden>
> wrote:
>>
>>
>> William Hutchison <address@hidden> wrote:
>> > IDs connected to the same wifi router for a video call (e.g., for
>> > testing), then when either of them hangs up, it immediately crashes
>> > the router as if the Reset button had been pushed and it takes the
>> > usual 30-40 seconds to recover the wifi. I thought it might be my
>>
>> Uhm, so nothing on your phone should ever crash another device.
>> Even if it were your programming, it would be wrong.  The router is
>> broken.  Please document the brand and OS version of the router, and
>> if you can, get a tcpdump/wireshark capture.  That could be hard...
>>
>> > programming, so I downloaded regular Linphone apps from the Play
>> > Store and the iPhone store, and the same thing happens with them --
>> > every time.  Any idea what could cause such strange behavior? Has
>> > anyone else tried this?
>>
>> I don't think that Linphone is using UPNP to open ports, but I could be
>> wrong
>> here.  It could well be that the arrangement of hair-pin'ed RTP ports
>> confuses the router, maybe even causes it to go into some kind of routing
>> loop.
>>
>> Please get a device that runs OpenWRT and try it: if it crashes too,
>> at least that could be easily diagnosed.
>>
>> --
>> ]               Never tell me the odds!                 | ipv6 mesh
>> networks [
>> ]   Michael Richardson, Sandelman Software Works        | network
>> architect  [
>> ]     address@hidden  http://www.sandelman.ca/        |   ruby on rails
>> [
>>
>>
>
>
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> Linphone-developers mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/linphone-developers
>



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