[Bug 28818] New: GetNetworkParams occasionally returns ERROR_BUFFER_OVERFLOW (race condition?)

http://bugs.winehq.org/show_bug.cgi?id=28818

Bug #: 28818
           Summary: GetNetworkParams occasionally returns
                    ERROR_BUFFER_OVERFLOW (race condition?)
           Product: Wine
           Version: 1.3.30
          Platform: x86
        OS/Version: Mac OS X
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

A common pattern for functions returning variable-sized data is to call the
function twice: once to get the size of the data, and once again to actually
get the data. The GetNetworkParams() function in iphlpapi is one such function.

Occasionally on Mac, GetNetworkParams() will return ERROR_BUFFER_OVERFLOW the
second time, even with a buffer of the size returned from the first time. My
guess is that the size is changing in between calls. I'm not sure if this is a
bug or what--can this happen on Windows? Also, is this a Wine bug, or a bug in
the Mac version of the BIND9 resolver?

Apple says the BIND9 resolver API is not recommended, and that new programs
should use the API in <dns.h> instead. Should Wine be doing this?