I need to filter Telnet packets using Jpcap.. how can I do it? I've tried with:
captor.setFilter("telnet", true);
but it does not work...
By calling your captor instance [ captor.loopPacket(-1,handler)
] with a handler like this :
public class TelnetReceiver implements PacketReceiver
{
public void receivePacket(Packet p)
{
if (p instanceof TCPPacket) { //Filter TCP only
TCPPacket tcp = (TCPPacket) p;
if(tcp.dst_port == 23 || tcp.src_port == 23)) {
//Do something with tcp.data or other layer fields
}
}
}
}
你可以过滤telnet端口(23):
captor.setFilter("port 23", true);
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