Module: wine Branch: master Commit: c593b2f48edc8810cdd2cde770a23fa8f80a8807 URL: https://source.winehq.org/git/wine.git/?a=commit;h=c593b2f48edc8810cdd2cde77... Author: Paul Gofman <pgofman(a)codeweavers.com> Date: Tue Mar 8 12:22:44 2022 +0300 ws2_32: Return WSAEFAULT from setsockopt() for IP_MULTICAST_LOOP with zero optlen. Signed-off-by: Paul Gofman <pgofman(a)codeweavers.com> Signed-off-by: Zebediah Figura <zfigura(a)codeweavers.com> Signed-off-by: Alexandre Julliard <julliard(a)winehq.org> --- dlls/ws2_32/socket.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/dlls/ws2_32/socket.c b/dlls/ws2_32/socket.c index dacb41a0403..816ca828b90 100644 --- a/dlls/ws2_32/socket.c +++ b/dlls/ws2_32/socket.c @@ -2981,6 +2981,11 @@ int WINAPI setsockopt( SOCKET s, int level, int optname, const char *optval, int return server_setsockopt( s, IOCTL_AFD_WINE_SET_IP_MULTICAST_IF, optval, optlen ); case IP_MULTICAST_LOOP: + if (!optlen) + { + SetLastError( WSAEFAULT ); + return -1; + } return server_setsockopt( s, IOCTL_AFD_WINE_SET_IP_MULTICAST_LOOP, optval, optlen ); case IP_MULTICAST_TTL: