TUTORIALS 》 Kompare GUI patch and diff tool in Linux

Here is my sample UDP socket code written in C. Unlike other versions you get commonly on-line this version is focused towards systems and network software developers and as a quick reference even for experienced software programmers. In this example/template, I am sending test raw binary data bytes from UDP sample client to registered UDP sample server. The code has documentation already in the form of comments (as you can see below). You can download my source below and you can use it directly in your projects or you can use the same for learning purposes to understand about user-space socket programming via IPv4 UDP transport layer protocol.

Watch detailed videos and read topics on Linux Kernel Programming and Linux ioctl() API interface

When you work on Network Namespaces (which is a feature Linux Kernel provides), you usually create bunch of virtual ethernet ports called as veth interfaces. The veth interface itself is a separate LK virtual network driver which offers this specific functionality. But sometimes besides veth you can also configure an optional interface called dummy interface. The dummy interface, just like veth (and other such virtual interfaces) is provided by LK via the driver drivers/net/dummy.c. The interesting aspect of dummy interface is that it serves as an alter ego of the loop-back localhost (as mentioned in the tldp.org article link below). Which means you can set any valid IP and this can serve as alternate local host ip other than 127.0.0.1. So to learn more, kindly watch my complete video series on this fascinating network interface called Dummy Interface.

Here is a quick reference of important Linux Kernel Data Structures of various assorted Kernel Subsystems such as: Process, Memory Management, Networking, File System, Device Drives, IPC and so on. So when you write custom Kernel code, it is often you may need to populate a new instance of one of these data-structures or just access the existing ones. Hence it is very important to know some of these and get familiarized with. You can bookmark this page, so that you can use this as a quick reference when you write your own custom Linux Kernel Modules.