[Bug 26031] New: µTorrent (uTorrent) fails listening to a port after a number of persistent connections are opened against it

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=26031

           Summary: µTorrent (uTorrent) fails listening to a port after a
                    number of persistent connections are opened against it
           Product: Wine
           Version: 1.3.13
          Platform: All
               URL: http://www.utorrent.com/
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wineserver
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: t.artem at mailcity.com


Steps to reproduce:

1) Run µTorrent
2) Incoming connections icon should turn green (port listen: OK), netstat -ln
confirms that
3) Start downloading any torrent
4) Incoming connections icon will turn red (Listen error: you should change the
listen port)

observe these errors logged in uTorrent Logger Tab:

[2011-02-09 02:28:50]     ***   Starting Diagnostic thread   ***
[2011-02-09 02:28:50]  IPv6 is installed
[2011-02-09 02:31:46]  TCP port bind failed 0.0.0.0:9001: (10048) Error 10048
[2011-02-09 02:32:12]  TCP port bind failed 0.0.0.0:9001: (10048) Error 10048

at this point neither Wine, nor µTorrent will be listening to the designated
port:

# netstat -ln -eep | grep 8008
udp        0      0 0.0.0.0:8008                0.0.0.0:*                      
        500        117033     10470/uTorrent.exe

so while uTorrent is listening to the incoming UDP connections, TCP traffic is
unmanaged causing the errors in the µTorrent's Logger Tab.

The strangest thing is that no other application will be able to use this port
(8008):

# nc -vl 8008
nc: Address already in use

However if I order nc to bind to the loopback interface specifically, it will
run:

# nc -vl localhost 8008
[running]

It's worth noting that when wine/uTorrent "listen" abilities break, there are
already some established connections to my_external_IP_address:8008 (right now
I see three such ESTABLISHED connections).

So, probably there's some sort of bug in wine server - it shouldn't stop
listening to a port when persistent connections are made to it - but I'm
totally uncertain about it because I have no idea how wine server (should)
handles TCP traffic.

I can help solving this bug by attaching any required debug information if it's
necessary.

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