As an update to my “hello world” kernel module article, there is a much easier way to set up your Debian-based Linux (including Ubuntu) to build kernel modules, without manually getting the relevant kernel headers using apt-get. I’ve tested this process with Ubuntu 8.04, 9.04 and 9.10 and it works great. Do the following to [...]
Read more →This is the second part of the series in creating a NetFilter module for Ubuntu 8.04 (running linux kernel 2.6.24-23). In it I’ll write a simple Netfilter module as a kernel module that simply drops all packets and logs dropped packets to /var/log/messages. In order to implement this we take the code for the kernel [...]
Read more →This is part one of my series on creating a Netfilter module in order to implement a routing protocol in Linux. I’ve broken down the challenge into three steps. Write a simple kernel module (this article) Add Netfilter hooks to kernel module Access packet headers within Netfilter hook Abstract routing daemon to a user space [...]
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