[Bug 19491] New: WSASend() fails when lpNumberOfBytesSent is NULL

http://bugs.winehq.org/show_bug.cgi?id=19491

Summary: WSASend() fails when lpNumberOfBytesSent is NULL
           Product: Wine
           Version: 1.1.26
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: winsock
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

WSASend() returns an error when lpNumberOfBytesSent (which is an output
parameter) is NULL. There is a condition in WSASendTo() in ws2_32/socket.c
which returns an EFAULT when lpNumberOfBytesSent is a NULL pointer.

While this makes sense, setting this argument to NULL is explicitly allowed by
the MSDN documentation, if the lpOverlapped parameter is present.

Not immediately clear how to fix this, since it involves checking how
overlapped i/o and i/o completion play out.