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我在 jpcap 库的帮助下在 java 中的以太网（eth0）上嗅探数据包......所以，在我的项目中，我有一个 JpcapCaptor ......

    //Open an interface with openDevice(NetworkInterface intrface, int snaplen, boolean promics, int to_ms)
        JpcapCaptor captor=JpcapCaptor.openDevice(devices[index], 65535, false, 20);
        captor.setFilter("icmp", true);
        captor.loopPacket(-1, new PacketPrinter());

然后我有数据包打印机，它打印嗅探数据包的主体......

    public class PacketPrinter implements PacketReceiver {
@Override
public void receivePacket(Packet packet) {
    InputStream is = new ByteArrayInputStream(packet.data);
    try {
        String sstr = IOUtils.toString(is, "UTF-8");
        System.out.println("STRING " + sstr);
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
       String ss;
    try {
        ss = new String(packet.data, "UTF-8");
        System.out.println("STRING " + ss);
    } catch (UnsupportedEncodingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } 
}

但是有一个问题...... packet.data是一个字节[]......并且控制台将其打印为

    STRING W�xQ��       !"#$%&'()*+,-./01234567
    STRING W�xQ��       !"#$%&'()*+,-./01234567
    STRING W�xQ��       !"#$%&'()*+,-./01234567

据我了解，这是因为编码问题？？？决定这个问题的解决方案是什么？

4

1 回答 1

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As I understand it is because of problem with encoding?

That may be correct. It also may be that the stuff you are trying to turn into a String is not text at all. In fact, if that is a raw network packet that you have sniffed, it is pretty much guaranteed that some of the packet (the IP/ICMP packet headers) won't be text.

What is the solution to this problem?

The solution is to understand what it is you are trying to decode and whether or not it is appropriate to decode it as if it was encoded text. If not, you need to decode / display it differently ... depending on what the relevant RFC says about the packets you are trying to display.

于 2013-04-25T05:31:28.993 回答