Re: [fluid-dev] fluidsynth rejects server connection

[Mark Knoop]

Thanks for your help. I've pulled this from git and built, however I
still see the same behaviour. Attempting to debug it now, I see lots of
logging references in the code such as

    FLUID_LOG (FLUID_DBG, "New client connection");

but it's not immediately apparent where these logging messages go, or
how to turn logging on. Is there a make or cmake variable that triggers
this?

At 10:17 on 19 Jan 2015, Element Green wrote:
>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
>>
>>


-- 
Mark Knoop