ws2_32: Move the getsockopt(IPV6_V6ONLY) implementation to ntdll.

dlls/ntdll/unix/socket.c

@@ -1896,6 +1896,9 @@ NTSTATUS sock_ioctl( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc, void *apc
             return do_setsockopt( handle, io, IPPROTO_IPV6, IPV6_UNICAST_IF, in_buffer, in_size );
 #endif
 
+        case IOCTL_AFD_WINE_GET_IPV6_V6ONLY:
+            return do_getsockopt( handle, io, IPPROTO_IPV6, IPV6_V6ONLY, out_buffer, out_size );
+
         default:
         {
             if ((code >> 16) == FILE_DEVICE_NETWORK)

dlls/ws2_32/socket.c

@@ -2428,16 +2428,7 @@ INT WINAPI WS_getsockopt(SOCKET s, INT level,
             return server_getsockopt( s, IOCTL_AFD_WINE_GET_IPV6_UNICAST_IF, optval, optlen );
 
         case WS_IPV6_V6ONLY:
-            if ( (fd = get_sock_fd( s, 0, NULL )) == -1)
-                return SOCKET_ERROR;
-            convert_sockopt(&level, &optname);
-            if (getsockopt(fd, level, optname, optval, (socklen_t *)optlen) != 0 )
-            {
-                SetLastError(wsaErrno());
-                ret = SOCKET_ERROR;
-            }
-            release_sock_fd( s, fd );
-            return ret;
+            return server_getsockopt( s, IOCTL_AFD_WINE_GET_IPV6_V6ONLY, optval, optlen );
 
         default:
             FIXME( "unrecognized IPv6 option %u\n", optname );

include/wine/afd.h

@@ -221,6 +221,7 @@ struct afd_get_events_params
 #define IOCTL_AFD_WINE_SET_IPV6_UNICAST_HOPS            WINE_AFD_IOC(276)
 #define IOCTL_AFD_WINE_GET_IPV6_UNICAST_IF              WINE_AFD_IOC(277)
 #define IOCTL_AFD_WINE_SET_IPV6_UNICAST_IF              WINE_AFD_IOC(278)
+#define IOCTL_AFD_WINE_GET_IPV6_V6ONLY                  WINE_AFD_IOC(279)
 
 struct afd_create_params
 {