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You will probably go using the Sockets and DatagramPacket objects.<br />
<br />
For a reference see<br />
- <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/net/Socket.html" rel="ugc">http://java.sun.com/j2se/1.4.2/docs/api/java/net/Socket.html</a><br />
- <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/net/DatagramPacket.html" rel="ugc">http://java.sun.com/j2se/1.4.2/docs/api/java/net/DatagramPacket.html</a><br />
<br />
For an overview and samples see<br />
- <a href="http://javaboutique.internet.com/resources/books/jpr/sample/42220502.htm" rel="ugc">http://javaboutique.internet.com/resources/books/jpr/sample/42220502.htm</a><br />
- <a href="http://www.javaworld.com/javaworld/jw-12-1996/jw-12-sockets.html" rel="ugc">http://www.javaworld.com/javaworld/jw-12-1996/jw-12-sockets.html</a>
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You will probably go using the Sockets and DatagramPacket objects.

For a reference see
- http://java.sun.com/j2se/1.4.2/docs/api/java/net/Socket.html [http://java.sun.com/j2se/1.4.2/docs/api/java/net/Socket.html]
- http://java.sun.com/j2se/1.4.2/docs/api/java/net/DatagramPacket.html [http://java.sun.com/j2se/1.4.2/docs/api/java/net/DatagramPacket.html]

For an overview and samples see
- http://javaboutique.internet.com/resources/books/jpr/sample/42220502.htm [http://javaboutique.internet.com/resources/books/jpr/sample/42220502.htm]
- http://www.javaworld.com/javaworld/jw-12-1996/jw-12-sockets.html [http://www.javaworld.com/javaworld/jw-12-1996/jw-12-sockets.html]

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Thanks for the info, but what I really needed to know was how I can utilize the libpcap and libpnet libraries provided by Linux, but using Java. &nbsp;Sorry for not being more specific.
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Thanks for the info, but what I really needed to know was how I can utilize the libpcap and libpnet libraries provided by Linux, but using Java.  Sorry for not being more specific.

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Alright, I'm not sure if this is the right place for this but here it goes. &nbsp;I am working on a group project for my network security course. &nbsp;The basic concept is to encrypt/decrypt NFS data packets, but outside the kernel, i.e., capture the entire NFS packet, encrypt it, put encrypted data in another packet, decrypt it, and finally give it to the kernel on the other side. Now this is mostly a proof of concept project and I know it will be slow and a host of other things are wrong here. &nbsp;What I need to know is; how do I go about grabbing a packet from the network?
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Alright, I'm not sure if this is the right place for this but here it goes.  I am working on a group project for my network security course.  The basic concept is to encrypt/decrypt NFS data packets, but outside the kernel, i.e., capture the entire NFS packet, encrypt it, put encrypted data in another packet, decrypt it, and finally give it to the kernel on the other side. Now this is mostly a proof of concept project and I know it will be slow and a host of other things are wrong here.  What I need to know is; how do I go about grabbing a packet from the network?

Capturing a packet in Linux

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.