Beispiel #1
0
// Parse will read as many packets as possible, outputting them on the channel.
func (s *PacketParser) Parse() (parsed int) {
	for {
		if s.buf.Len() < 3 {
			return
		}
		b := s.buf.Bytes()
		if b[0] != 0x02 && b[0] != 0x04 {
			// observed packets always begin with 0x02, assume a desync
			fmt.Printf("desync; truncating with buf: %s\n", humanhex.String(b, 3))
			s.buf.Reset()
			return
		}
		l := (int(b[1]) << 8) + int(b[2])

		if s.buf.Len() < (l + 4) {
			return
		}

		// header is 3 bytes, plus 1 byte checksum
		d := make([]byte, l+4)
		s.buf.Read(d)
		s.ch <- NewRawPacket(d)

		parsed++
	}
}
Beispiel #2
0
// String returns a dump of the packet data
func (p *RawPacket) String() string {
	return fmt.Sprintf("%v -> %v %v %s",
		p.From, p.To, p.Kind, humanhex.String(p.Payload, 3))
}