netConnectUnixWindows

fn netConnectUnixWindows(
    userdata: ?*anyopaque,
    address: *const net.UnixAddress,
) net.UnixAddress.ConnectError!net.Socket.Handle {
    if (!net.has_unix_sockets) return error.AddressFamilyUnsupported;
    if (!have_networking) return error.NetworkDown;
    const t: *Threaded = @ptrCast(@alignCast(userdata));
    _ = t;
    const is_abstract = address.isAbstract();
    const wps = if (!is_abstract) sliceToPrefixedFileW(null, address.path, .{
        .allow_relative = false,
    }) catch |err| switch (err) {
        error.NameTooLong, error.BadPathName => return error.FileNotFound,
        else => |e| return e,
    } else undefined;
    const socket_handle = openSocketAfd(ws2_32.AF.UNIX, .{ .mode = .stream }) catch |err| switch (err) {
        error.ProtocolUnsupportedByAddressFamily => return error.AddressFamilyUnsupported,
        else => |e| return e,
    };
    errdefer windows.CloseHandle(socket_handle);
    if (!is_abstract) try socketOptionAfd(socket_handle, .special, 0, ws2_32.SO.UNIX_PATH, @constCast(
        @as([]const u8, @ptrCast(&windows.AFD.SOCKOPT_INFO.UNIX_PATH{
            .Path = wps.data,
        }))[0 .. @offsetOf(windows.AFD.SOCKOPT_INFO.UNIX_PATH, "Path") + @sizeOf(windows.WCHAR) * wps.len],
    ));
    bindSocketUnixAfd(socket_handle, &(net.UnixAddress.init("") catch |err| switch (err) {
        error.NameTooLong => unreachable,
    })) catch |err| switch (err) {
        error.AddressInUse => return error.Unexpected,
        else => |e| return e,
    };
    const Storage = extern struct { Reserved0: [3]usize = @splat(0), Address: UnixAddress };
    var storage: Storage = .{ .Address = undefined };
    const addr_len = addressUnixToPosix(address, &storage.Address);
    switch ((try deviceIoControl(&.{
        .file = .{ .handle = socket_handle, .flags = .{ .nonblocking = true } },
        .code = windows.IOCTL.AFD.CONNECT,
        .in = @as([]const u8, @ptrCast(&storage))[0 .. @offsetOf(Storage, "Address") + addr_len],
    })).u.Status) {
        .SUCCESS => {},
        .CANCELLED => unreachable,
        .INSUFFICIENT_RESOURCES => return error.SystemResources,
        else => |status| return windows.unexpectedStatus(status),
    }
    return socket_handle;
}