fix sockopt for windows

transport/internet/sockopt_windows.go

@@ -13,11 +13,11 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 	if strings.HasPrefix(network, "tcp") {
 		switch config.Tfo {
 		case SocketConfig_Enable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, 1); err != nil {
+			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, 1); err != nil {
 				return err
 			}
 		case SocketConfig_Disable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, 0); err != nil {
+			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, 0); err != nil {
 				return err
 			}
 		}
@@ -30,11 +30,11 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 	if strings.HasPrefix(network, "tcp") {
 		switch config.Tfo {
 		case SocketConfig_Enable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, 1); err != nil {
+			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, 1); err != nil {
 				return err
 			}
 		case SocketConfig_Disable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, 0); err != nil {
+			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, 0); err != nil {
 				return err
 			}
 		}