https://bugs.winehq.org/show_bug.cgi?id=50499
--- Comment #7 from Erich E. Hoover erich.e.hoover@gmail.com --- (In reply to James from comment #6)
I have tested it, and SO_ATTACH_REUSEPORT_CBPF works. One can get Linux to behave like Windows on receipt of UDP packets.
See "udpbftserver.c" from here: https://github.com/jcdutton/wine-testing
Wonderful, that's excellent news! Have you ever put together a test case for wine before? (This should probably be two patches: one with a test case and another that fixes the problem)