[Bug 33791] New: UPD socket does not react to packets from the same machine

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=33791

             Bug #: 33791
           Summary: UPD socket does not react to packets from the same
                    machine
           Product: Wine
           Version: 1.5.31
          Platform: x86
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: winsock
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: oblovatniy at gmail.com
    Classification: Unclassified


Created attachment 44774
  --> http://bugs.winehq.org/attachment.cgi?id=44774
traffic schemas

I have a dedicated game server (for IL-2 Sturmovik), which I run under Wine.
This server has an opened UDP port which provides access to server's API. 

The problem is when I run the server on localhost and try to send data to UDP
socket it does not react. Wireshark shows that there was a packet transmission.
Running Wine with WINEDEBUG="+winsock" shows that after sending data nothing
happens. This issue is related only to localhost-to-localhost connection.

If I run server on Linux machine A (LM:A) and try to connect from Linux machine
B (LM:B), then it's OK. If I try to connect to LM:A from Windows machine A
(WM:A) then it's OK either.
If I run server on WM:A and try to connect from any LM, then it's OK. If I try
to connect to WM:A from the same WM:A or from WM:B, then it's OK again.
So, the server itself seems to work correctly, but if I run server on LM:A and
try to connect from the same LM:A then just nothing happens.

Here is a topic on the forum: http://forum.winehq.org/viewtopic.php?f=8&t=19092

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