packet decoder

                byte[] buffer = new byte[bb.remaining()];
                int start = bb.position();
                int end = start + bb.remaining();
                for(int i = start; i < end; i++){
                    buffer[i - start] = bb.get(i);
                }
                StringBuilder sb = new StringBuilder();
                for(byte b: buffer){
                    String s = Integer.toHexString(b);
                    while(s.length() < 2){
                        s = "0" + s;
                    }
                    sb.append(s);
                }
//              System.out.println("Full encapsulated packet buffer: " + sb.toString());