Function CreateUnmonitoredTUNFromFD

polyamide/tun/tun_linux.go:637–660

CreateUnmonitoredTUNFromFD creates a Device from the provided file descriptor.

(fd int)

// CreateUnmonitoredTUNFromFD creates a Device from the provided file
// descriptor.
func CreateUnmonitoredTUNFromFD(fd int) (Device, string, error) {
	err := unix.SetNonblock(fd, true)
	if err != nil {
		return nil, "", err
	}
	file := os.NewFile(uintptr(fd), "/dev/tun")
	tun := &NativeTun{
		tunFile:     file,
		events:      make(chan Event, 5),
		errors:      make(chan error, 5),
		tcpGROTable: newTCPGROTable(),
		udpGROTable: newUDPGROTable(),
		toWrite:     make([]int, 0, conn.IdealBatchSize),
	}
	name, err := tun.Name()
	if err != nil {
		return nil, "", err
	}
	err = tun.initFromFlags(name)
	if err != nil {
		return nil, "", err
	}
	return tun, name, err
}