Re: [fluid-dev] fluidsynth rejects server connection

[Element Green]

Hello Mark,

Thank you for reporting this.  Looks like it was an issue with fluid_server_handle_connection() not having a return value, which meant undefined behavior, since the return value was getting checked for a success value in fluid_server_socket_run(), but the return value was not getting properly assigned.  So this probably worked on some systems and not others.

I checked in a fix for this into the git repository.

Best regards,

Element Green

On Mon, Jan 19, 2015 at 9:35 AM, Mark Knoop <address@hidden> wrote:

Hi Element,

Thanks for your reply.

>When I encounter network related issues like that, it can sometimes be
>helpful to get a network traffic capture with an application like
>Wireshark.  When testing connections to FluidSynth you'd want to
>capture on the lo loop back interface.

Wireshark shows the TCP handshake establishing the connection, then
fluidsynth immediately sends FIN-ACK. See attached capture file.

>I'd also check to make sure
>you don't have any firewall rules enabled which would be causing
>this.  It might be worth doing a quick test using netcat to create a
>TCP/IP server on the same port 9800 and see if it works, to rule out
>any system related causes of port 9800 being blocked.

Netcat server on 9800 works with no problem.

>Also, are you using the default Fedora package for FluidSynth or are
>you building from source?  If you try building from source, does the
>issue also occur.

Have tried both with the same results.

>If I was still having issues, I'd start delving into debugging
>FluidSynth. For example, setting a breakpoint on
>fluid_server_handle_connection() to see if that callback is getting
>called when an incoming connection occurs. Or checking to see if
>fluid_istream_readline() gets called, which handles shell input and
>see if it is returning any values which would cause a disconnect.

I'll try these suggestions when I have a chance, thanks.

Regards,

Mark

>Hopefully that is helpful in figuring out what is going on.
>
>Best regards,
>
>Element Green
>
>
>On Mon, Jan 19, 2015 at 2:59 AM, Mark Knoop <address@hidden> wrote:
>
>> Hi list,
>>
>> I'm having a problem on Fedora 21 where fluidsynth rejects any server
>> connection. This always worked without problems on Fedora 20 and
>> earlier which leads me to suspect that it might be related to some
>> distro change or update (e.g. compiler version).
>>
>> Has anyone experienced anything similar? I could use some suggestions
>> as to how to debug this. I have tried building from git source
>> (master) and get the same result.
>>
>> Thanks for any help.
>>
>> $ fluidsynth -lsi -apulseaudio &
>> [1] 18386
>> FluidSynth version 1.1.6
>> Copyright (C) 2000-2012 Peter Hanappe and others.
>> Distributed under the LGPL license.
>> SoundFont(R) is a registered trademark of E-mu Systems, Inc.
>>
>> fluidsynth: Using PulseAudio driver
>>
>> $ telnet 127.0.0.1 9800
>> Trying 127.0.0.1...
>> Connected to localhost.
>> Escape character is '^]'.
>> Connection closed by foreign host.
>>
>> $ echo fonts | nc 127.0.0.1 9800
>> Ncat: Connection reset by peer.
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=1183328
>>
>> --
>> Mark Knoop
>>
>> _______________________________________________
>> fluid-dev mailing list
>> address@hidden
>> https://lists.nongnu.org/mailman/listinfo/fluid-dev
>>

--
Mark Knoop

_______________________________________________
fluid-dev mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/fluid-dev