Re: [Linphone-users] hoping for help in protocol analyzation

[boris]

Hej Dennis,

Am 2021-09-21 18:47, schrieb Dennis Filder:
> On Tue, Sep 21, 2021 at 04:16:39PM +0200, Boris wrote:
>
> > The problems in short words:
> > 1. An incoming call cannot be accepted: Pressing the green handset 
> > gives an
> > 'unreachable' message to the caller.
> > 2. An outgoing call works just fine but terminates reproduceable after 
> > 15
> > minutes and some seconds.
> >
> > So I waited for an uptodate LinPhone on Debian Bullseye - and here it 
> > is:
> > LinPhone is on Qt5.15.2 Core 4.4.21 in Debian 11 and I would be very 
> > glad to
> > make it work!
> >
> > I made a logfile for the second issue but I am unable to analyze it 
> > due to
> > volume an complexity. Is anybody about to help?
> >
> > Have a look at the log from
> > https://ta6.short.gy/b8myTo
> >
> > In fact the SIP-provider is in my focus. He seems to use unusual 
> > settings
> > for his service but doesn't give support for me as being an "exotic" 
> > user.
> > So I hope it should be possible to find it out wit the log.
>
> Debian maintainer here.

Wow, prominent support - that makes me hope! Thank you in advance!

> The error message is this:
>
> > 2021-09-17 09:03:39:036 [linphone/belle-sip] MESSAGE Changing [server] 
> > [INVITE] transaction [0x562792d3ab20], from state [ACCEPTED] to 
> > [TERMINATED]
> > 2021-09-17 09:03:39:037 [linphone/belle-sip] MESSAGE Server INVITE 
> > transaction [0x562792d3ab20] terminated
> > 2021-09-17 09:03:39:037 [linphone/belle-sip] ERROR Dialog 
> > [0x562792cb0310] was not ACK'd within T1*64 seconds, it is going to be 
> > terminated.
> > 2021-09-17 09:03:39:037 [linphone/belle-sip] MESSAGE Dialog 
> > [0x562792cb0310]: now updated by transaction [0x5627930a4f30].
> > 2021-09-17 09:03:39:037 [linphone/belle-sip] MESSAGE Transaction 
> > [0x562792d3ab20] deleted
> > 2021-09-17 09:03:39:037 [linphone/belle-sip] MESSAGE Changing [client] 
> > [BYE] transaction [0x5627930a4f30], from state [INIT] to [TRYING]
> > 2021-09-17 09:03:39:037 [linphone/belle-sip] MESSAGE channel 
> > [0x562790930250]: message sent to [UDP://cx.dtst.de:5060], size: [423] 
> > bytes
>
> What also seems strange to me is this:
>
> > Contact: 
> > <sip:<YOURPHONENUMBER>@192.168.23.150;transport=udp>;expires=3600;+sip.instance="<urn:uuid:317ed210-8b23-0033-b9c2-cf1a4451f191>"
>
> and this:
>
> > 2021-09-17 08:26:25:478 [linphone/belle-sip] MESSAGE channel 
> > [0x562790930250]: discovered public ip and port are 
> > [192.168.23.150:5060]
>
> As far as I can tell you're not using a local SIP proxy to connect to
> DT's SIP gateway.  But you don't seem to have a STUN server set up
> either.  Thus my guess is that Linphone has no way of knowing what it
> has to fill in the messages as your public IP address (SIP needs these
> addresses to be routable, so using a local IP address only works when
> using a local SIP proxy), so it uses the one on your local network
> card.  I suspect the confusion arising from that is never resolved and
> it is large enough for Linphone to no longer be able to link incoming
> messages to existing connections, thus timeout timers are not reset as
> they should be leading to the connection termination.  This is
> accompanied by this message:
>
> > 2021-09-17 09:03:07:018 [linphone/liblinphone] MESSAGE Local stream 
> > description has changed: NETWORK_CHANGED
>
> This indicates that Linphone's idea of the network configuration has
> changed, but apparently it does not change its idea of the public IP
> address.
>
> You might have to enable STUN/TURN on your Internet router (assuming
> its firmware supports that) and then configure Linphone accordingly.
> Alternatively, use your router's SIP proxy as the next hop.

OK, I will try to draw conclusions from that. Do I understand correct, 
that I have to use either a STUN server or a local proxy to make 
LinPhone work fully?

As far as I could research until now, DT doesn't serve STUN.

And a local proxy would possibly prevent a second SIP service from being 
used on the LAN?

More facs from my local network:
a) The router is a full-configurable box based on APU Board with 
LEAF-software (http://leaf.zetam.org/), which is a purified small 
Linux.....
b) There is a Panasonic KXsomething IP-Phone working all fine within the 
local network against the DT.
c) LinPhone works fine as well against an other SIP-Provider (TNG).
d) The disconnection after 15 minutes doesn't happen with Twinkle as 
softphone.

> Good luck.

thanks and regards,

Boris