Inet4Address server = getInet4Address(Arrays.copyOfRange(bytes, 4, 8));

    int flags = ByteStreams.newDataInput(bytes, 8).readShort() & 0xffff;

    // Teredo obfuscates the mapped client port, per section 4 of the RFC.
    int port = ~ByteStreams.newDataInput(bytes, 10).readShort() & 0xffff;

    byte[] clientBytes = Arrays.copyOfRange(bytes, 12, 16);
    for (int i = 0; i < clientBytes.length; i++) {

      try {
        return input.readUnsignedByte();
      } catch (IOException e) {
        throw new IllegalStateException(e);
      }
    }

    @Override
    public short readShort() {
      try {
        return input.readShort();
      } catch (IOException e) {
        throw new IllegalStateException(e);
      }
    }

    @Override
    public int readUnsignedShort() {
      try {

    Inet4Address server = getInet4Address(Arrays.copyOfRange(bytes, 4, 8));

    int flags = ByteStreams.newDataInput(bytes, 8).readShort() & 0xffff;

    // Teredo obfuscates the mapped client port, per section 4 of the RFC.
    int port = ~ByteStreams.newDataInput(bytes, 10).readShort() & 0xffff;

    byte[] clientBytes = Arrays.copyOfRange(bytes, 12, 16);
    for (int i = 0; i < clientBytes.length; i++) {