Chore: rename to fdbased

core/device/fdbased/fd_unix.go

@@ -0,0 +1,45 @@
+//go:build !windows
+
+package fdbased
+
+import (
+	"fmt"
+	"strconv"
+
+	"github.com/xjasonlyu/tun2socks/v2/core/device"
+
+	"golang.org/x/sys/unix"
+	"gvisor.dev/gvisor/pkg/tcpip/stack"
+)
+
+type FD struct {
+	stack.LinkEndpoint
+
+	fd  int
+	mtu uint32
+}
+
+func Open(name string, mtu uint32) (device.Device, error) {
+	fd, err := strconv.Atoi(name)
+	if err != nil {
+		return nil, fmt.Errorf("cannot open fd: %s", name)
+	}
+	if mtu == 0 {
+		mtu = defaultMTU
+	}
+	return open(fd, mtu)
+}
+
+func (f *FD) Type() string {
+	return Driver
+}
+
+func (f *FD) Name() string {
+	return strconv.Itoa(f.fd)
+}
+
+func (f *FD) Close() error {
+	return unix.Close(f.fd)
+}
+
+var _ device.Device = (*FD)(nil)