xjasonlyu/tun2socks

//go:build !(linux && amd64) && !(linux && arm64) && !windows

package fdbased

import (
    "fmt"
    "os"

    "github.com/xjasonlyu/tun2socks/v2/core/device"
    "github.com/xjasonlyu/tun2socks/v2/core/device/iobased"
)

func open(fd int, mtu uint32, offset int) (device.Device, error) {
    f := &FD{fd: fd, mtu: mtu}

    ep, err := iobased.New(os.NewFile(uintptr(fd), f.Name()), mtu, offset)
    if err != nil {
        return nil, fmt.Errorf("create endpoint: %w", err)
    }
    f.LinkEndpoint = ep

    return f, nil
}