[Bug 43286] New: Qt 5.7.0 based: Cannot read UDP packets: "errno 90, ( Message too long)"

https://bugs.winehq.org/show_bug.cgi?id=43286

Bug ID: 43286
           Summary: Qt 5.7.0 based: Cannot read UDP packets: "errno 90,
                    (Message too long)"
           Product: Wine
           Version: 2.11
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winsock
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 58625
  --> https://bugs.winehq.org/attachment.cgi?id=58625
Binary, source code, debug log

In any program using Qt 5.7.0, if you try to read a udp datagram packet, the
call would always return size 0 and leave you with an empty peer-address/port
as well.

I discovered the problem in the launcher for my game which uses UDP to ping
various servers.

I wrote a minimal UDP server to which you can connect with netcat (or anything)
and it easily reproduces the problem.

Attached you'll find a small archive containing:

- minimal udp test server
- source code for that server
- debug log with +winsock showing the error
- the client netcat command to cause that error

Note: I have not checked a simple raw UDP server using the winsock API
directly.

The problem exists at least since wine v1.6.2