Why?

While learning more about clojure, I wanted to do some network sniffing. Following a guide to raw traffic in clojure I needed to install jpcap in order to use libpcap from java.

Jpcap doesn’t provide a 64-bit version so I had to compile my own. Here’s the documentation of how I did it. A patch is provided at the end of the post.

Compiling jpcap 0.7 on 64-bit Ubuntu 10.10

1. First install sun java on ubuntu 10.10

2. Download jpcap or use the following command:

   wget http://netresearch.ics.uci.edu/kfujii/Jpcap/jpcap-0.7.tar.gz
   

3. Untar jpcap

   tar -xvf jpcap-0.7.tar.gz
   

4. Move into src directory

   cd jpcap-0.7/src/c/
   

5. Open up Makefile in your favorite editor (mine’s emacs)

   emacs Makefile
   

6. Change this line:

   JAVA_DIR = $(JAVA_HOME)
   

To This:

JAVA_DIR = /usr/lib/jvm/java-6-sun/

1. Change the compile options from this:

   COMPILE_OPTION = -shared -L.
   

To this:

COMPILE_OPTION = -shared -L. -fPIC

1. Save your file and close your editor.

2. Run make:

   make
   

3. Follow the jpcap installation instructions

Patch for more advanced users

Patch to do this automatically

How to patch

Let me know if you have any problems!