July 2010

Hi Mark I implemented a simple IMAP4 ,
I wanted to share for people that need something like this.

Also I made changes that you offered me before. Please have a look that

import org.jnetpcap.nio.JBuffer;
import org.jnetpcap.packet.JHeader;
import org.jnetpcap.packet.JPacket;
import org.jnetpcap.packet.JRegistry;
import org.jnetpcap.packet.RegistryHeaderErrors;
import org.jnetpcap.packet.annotate.Bind;
import org.jnetpcap.packet.annotate.Header;
import org.jnetpcap.packet.annotate.HeaderLength;
import org.jnetpcap.packet.annotate.ProtocolSuite;
import org.jnetpcap.protocol.tcpip.Tcp;

/**
 *
 * @author Mehmet Emin PACA
 */
@Header( suite = ProtocolSuite.TCP_IP)
public class IMAP4  extends JHeader
{


    private final Tcp tcp = new Tcp();
    public  boolean isServer;
    public  boolean isClient;





    @Override
    protected void decodeHeader()
    {

        super.getPacket().hasHeader(tcp);

        if( tcp.source() == 143 )
        {
            isServer = true;
            isClient = false;
        }
        else
        {
            isServer = false;
            isClient = true;
        }

    }





    @HeaderLength
    public static int headerLength( JBuffer buffer, int offset)
    {

        return buffer.size() - offset;

    }


    static{

        try{

            JRegistry.register( IMAP4.class);

        }
        catch( RegistryHeaderErrors error )
        {
            error.printStackTrace();
        }
    }


    public String getContent()
    {

        String content = super.getUTF8String(0, this.getHeaderLength());

        return content;

    }


    @Bind( to = Tcp.class)
    public static boolean bindToTcp( JPacket packet , Tcp tcp )
    {

        return ( tcp.source() == 143 || tcp.destination() == 143 );

    }

    @Override
    public String toString()
    {
   
        return getContent();
    }

}

Hi Mark, I started to POP3 protocol and I wrote a protocol. I wanted to share. It is working
( I made some tests and I did not see any problems). If you see any errors please feedback.

/*
 * POP3 protocol header definition 
 */


import org.jnetpcap.nio.JBuffer;
import org.jnetpcap.packet.JHeader;
import org.jnetpcap.packet.JPacket;
import org.jnetpcap.packet.JRegistry;
import org.jnetpcap.packet.RegistryHeaderErrors;
import org.jnetpcap.packet.annotate.Bind;
import org.jnetpcap.packet.annotate.Header;
import org.jnetpcap.packet.annotate.HeaderLength;
import org.jnetpcap.packet.annotate.ProtocolSuite;
import org.jnetpcap.protocol.tcpip.Tcp;

/**
 *
 * @author Mehmet Emin PACA
 */
@Header( suite = ProtocolSuite.TCP_IP)
public class POP3  extends JHeader
{


    @HeaderLength
    public static int headerLength( JBuffer buffer, int offset)
    {

        return buffer.size() - offset;

    }


    static{

        try{

            JRegistry.register(POP3.class);

        }
        catch( RegistryHeaderErrors error )
        {
            error.printStackTrace();
        }
    }


    public String getContent()
    {

        byte [] byteArray = super.getByteArray(0, this.getHeaderLength());
        String content = new String(byteArray);

        return content;

    }


    @Bind( to = Tcp.class)
    public static boolean bindToTcp( JPacket packet , Tcp tcp )
    {

        return ( tcp.source() == 110 || tcp.destination() == 110 );

    }


    public boolean isServer()
    {

        Tcp tcp = new Tcp();
        if (super.getPacket().hasHeader(tcp) )
            if( tcp.source() == 110 )
                return true;

        return false;


    }

    public boolean isClient()
    {
        return !isServer();
    }

}

Hi, trying to open an offline file in a different location to the actual jNetPcap program I've made. Is there are syntax to traverse up and down directories or would I have to give a full location?

I have a test folder at the moment that is separate to the source, and would like to be able to pass something like:

Pcap pcap = Pcap.openOffline("..\testCaptures\sample.pcap", errbuf)

Allowing for the escape of backslashes of course. Doing this on a Windows box at the moment, is there something I'm missing?

(By the way, amazing piece of code!)

Cheers,

Ben

jNetPcap is a java project that comes with a required native shared library. The requirement of a native library typically adds confusion and presents difficulty for many as to how properly setup a project in netbeans to reference jNetPcap library correctly.

There are several ways that jNetPcap can be added to your existing java project in Netbeans IDE. Let me briefly outline them here and then lets go through the detailed steps of actually creating a proper build path so your project will compile with jNetPcap.

1. Create a jNetPcap "library" which adds the jnetpcap-*.jar file to the build path
2. Create a new run project config that includes native library
3. Add jnetpcap's jar file to project's build path, but copy the neccessary native library to a system library directory (/usr/lib under unix or \windows\SystemXX under windows).

We recommend approaches #1 and #2 for development.

Note: the native library is only required for running/executing the application. It is not required for compilation. It is needed only at runtime.

First thing first

First thing you have to do is download and install (or unzip) the jNetPcap installation package. You do not have to install (unzip or untar) the installation package under an Netbeans workspace, unless you want to for a specific reasons. The installation can be external to the workspace. Since each jNetPcap installation package installs under a unique directory path, you can easily have multiple versions of the library and switch between them when needed. Both installable and extractable unix and windows packages are provided. Under unix the packager installed packages are intended for production environments, that have a jNetPcap requirement. At same time the JAR and unzip packages are provided incase you need multiple versions of the library where you can extract on your own and easily switch between them.