Beispiel #1
1
func (t *Interface) Write(ch chan []byte) (err error) {
	tx := syscall.Overlapped{}
	var hevent windows.Handle
	hevent, err = windows.CreateEvent(nil, 0, 0, nil)
	if err != nil {
		return
	}
	tx.HEvent = syscall.Handle(hevent)
	for {
		select {
		case data := <-ch:
			var l uint32
			syscall.WriteFile(t.file, data, &l, &tx)
			syscall.WaitForSingleObject(tx.HEvent, syscall.INFINITE)
			tx.Offset += uint32(len(data))
		}
	}
}
func (t *tun) Read(ch chan []byte) (err error) {
	overlappedRx := syscall.Overlapped{}
	var hevent windows.Handle
	hevent, err = windows.CreateEvent(nil, 0, 0, nil)
	if err != nil {
		return
	}
	overlappedRx.HEvent = syscall.Handle(hevent)
	buf := make([]byte, t.mtu)
	var l uint32
	for {
		if err := syscall.ReadFile(t.fd, buf, &l, &overlappedRx); err != nil {
		}
		if _, err := syscall.WaitForSingleObject(overlappedRx.HEvent, syscall.INFINITE); err != nil {
			fmt.Println(err)
		}
		overlappedRx.Offset += l
		totalLen := 0
		switch buf[0] & 0xf0 {
		case 0x40:
			totalLen = 256*int(buf[2]) + int(buf[3])
		case 0x60:
			continue
			totalLen = 256*int(buf[4]) + int(buf[5]) + IPv6_HEADER_LENGTH
		}
		fmt.Println("read data", buf[:totalLen])
		send := make([]byte, totalLen)
		copy(send, buf)
		ch <- send
	}
}
Beispiel #3
0
func newOverlapped() (*syscall.Overlapped, error) {
	var overlapped syscall.Overlapped
	r, _, err := syscall.Syscall6(nCreateEvent, 4, 0, 1, 0, 0, 0, 0)
	if r == 0 {
		return nil, err
	}
	overlapped.HEvent = syscall.Handle(r)
	return &overlapped, nil
}
Beispiel #4
0
func (t *Interface) Read(ch chan []byte) (err error) {
	rx := syscall.Overlapped{}
	var hevent windows.Handle
	hevent, err = windows.CreateEvent(nil, 0, 0, nil)
	if err != nil {
		return
	}
	rx.HEvent = syscall.Handle(hevent)
	buf := make([]byte, 1500)
	var l uint32
	for {
		if err := syscall.ReadFile(t.file, buf, &l, &rx); err != nil {
		}
		if _, err := syscall.WaitForSingleObject(rx.HEvent, syscall.INFINITE); err != nil {
			Log(Error, "Failed to read from TUN/TAP: %v", err)
		}
		rx.Offset += l
		ch <- buf
	}
}
Beispiel #5
0
func (p *dev) Read(buf []byte) (int, error) {
	var done uint32

	for {
		var ov syscall.Overlapped

		ov.HEvent = p.ev.r
		if e := syscall.ReadFile(p.fd, buf, &done, &ov); e != nil {
			if e != syscall.ERROR_IO_PENDING {
				return 0, &os.PathError{"reading from", p.name, e}
			}
			if e = win.GetOverlappedResult(p.fd, &ov, &done, 1); e != nil {
				return 0, &os.PathError{"reading from", p.name, e}
			}
		}
		if done > 0 {
			break
		}
	}
	return int(done), nil
}