github.com/borderzero/water@v0.0.1/syscalls_linux_legacy.go (about)

     1  // +build linux,!go1.11
     2  
     3  package water
     4  
     5  import (
     6  	"os"
     7  )
     8  
     9  func openDev(config Config) (ifce *Interface, err error) {
    10  	var file *os.File
    11  	if file, err = os.OpenFile(
    12  		"/dev/net/tun", os.O_RDWR, 0); err != nil {
    13  		return nil, err
    14  	}
    15  
    16  	name, err := setupFd(config, file.Fd())
    17  	if err != nil {
    18  		return nil, err
    19  	}
    20  
    21  	return &Interface{
    22  		isTAP:           config.DeviceType == TAP,
    23  		ReadWriteCloser: file,
    24  		name:            name,
    25  	}, nil
    26  }