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Watch on Youtube - [472//0] 189 ip_send_check() API Example and sample demo - Linux Kernel struct iphdr data-structure - part3 ↗
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☆ Video Episodes :: Linux Kernel programming ↗

Video Episodes :: Linux Kernel Network Programming

Linux Kernel struct socket and struct sock data-structure ↗
Saturday' 13-Mar-2021

Linux Kernel net_device data-structure ↗
Saturday' 13-Mar-2021
struct net_device, is the main Linux Kernel network interface or network port data-structure. Each network interface entry whatever you find in user-space commands like ifconfig, ip link, ip addr, is actually a struct net_device data-structure Linux Kernel driver instance for that corresponding port. In fact every packet buffer instance managed by the Linux Kernel via struct sk_buff contains a reference pointer pointing to its corresponding TX/ RX interface struct net_device instance. Hence here is my multi-part video series and research on the struct net_device data-structure.

Linux Kernel struct iphdr data-structure ↗
Saturday' 13-Mar-2021

Linux Kernel TCP Congestion Control Algorithms ↗
Saturday' 13-Mar-2021

Linux Kernel Dummy Network Interface /drivers/net/dummy.c Network Namespace Research ↗
Saturday' 01-Jan-2022
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 So to learn more, kindly watch my complete video series on this fascinating network interface called Dummy Interface.

Linux Kernel Network Programming - struct net - struct netns_ipv4 - /proc/sys/net/ipv4 ↗
Saturday' 13-Mar-2021

Linux Kernel struct udphdr data-structure ↗
Saturday' 13-Mar-2021

Linux Kernel dst_entry data-structure ↗
Saturday' 13-Mar-2021

Linux Kernel sk_buff data-structure - Episode-1 to Episode-10 ↗
Saturday' 13-Mar-2021

Linux Kernel struct ethhdr data-structure ↗
Wednesday' 18-May-2022

Linux Kernel sk_buff data-structure - Episode-11 to Episode-18 ↗
Saturday' 13-Mar-2021

Linux Kernel Network Programming ↗
Saturday' 13-Mar-2021

Linux Kernel Networking Sub-system ↗
Saturday' 13-Mar-2021

Linux Kernel struct tcphdr data-structure ↗
Saturday' 13-Mar-2021

Linux Kernel Network Programming - Transport Layer L4 TCP/UDP Registration - Protocol APIs ↗
Saturday' 13-Mar-2021

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Watch on Youtube - [853//0] 0x18c Architecting | Process and Threads | Part 1/2 | The Linux Channel ↗

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Watch on Youtube - [937//0] 215 Linux Kernel build system - hardware specs ↗

What is purpose of Kernel Development - Example SMOAD Networks SDWAN Orchestrator Firewall Kernel Engine ↗
Monday' 18-Jul-2022
Often aspiring students may have this question, that what is the purpose of Linux Kernel Development. Since Linux Kernel is very mature and it has almost everything one would need. Usually, we need custom kernel development in the case of any new driver development for new upcoming hardware. And this happens on and on. But at times we may also come across few features/modules/components which are already provided by the Linux Kernel which are not adequate or atleast not the way we exactly intended to use. So, this is the real-world example, sometimes no matter what Linux Kernel provides as a part of stock Kernel/OS features, sometimes we have to write our own custom kernel stack or module(s) which can specifically cater our exact needs.

Roadmap - How to become Systems Software Developer ↗
Friday' 13-May-2022
When you are at the beginning of your career or a student, and aspire to become a software developer, one of the avenues to choose is to become a hard-core Systems Software Developer. However it is easier said than done, since there are many aspects to it as you explore further. As a part of systems developer, you can get into core kernel space developer, kernel device drivers developer, embedded developer and get into things like board bring-up, porting, etc, or can become a user-space systems programmer, and so on. So here is my detailed multi-episode Youtube video series on Roadmap - How to become Systems Software Developer.

The Linux Channel :: Sponsors ↗
Monday' 30-May-2022
Here is a list of all The Linux Channel sponsors/donors (individual/companies).

Linux Kernel vs User-space - Library APIs - Linux Kernel Programming ↗
Tuesday' 17-Jan-2023
One of the important aspects a beginner who is into Linux Kernel space systems software development has to understand is that unlike user-space C/C++ programming, where you can freely include any library APIs via respective #include files (which are dynamically linked during run-time via those /lib .so files), in the case of Kernel space programming, these library APIs are written within the Kernel source itself. These are the fundamental APIs which we commonly use, such as memcpy(), memcmp(), strlen(), strcpy(), strcpy() and so on. So here is my detailed Youtube video episode on the same with live demo, walk-through and examples.

Linux Kernel Driver Device Trees ↗
Tuesday' 17-Jan-2023
The Linux kernel is the backbone of the Linux operating system. A device tree is a hierarchical tree structure that describes the various devices that are present in a system, including their properties and relationships to one another. The device tree is used by the Linux kernel to identify and initialize the different devices on a system, and to provide a consistent interface for interacting with them.

Linux Kernel /sysfs Interface ↗
Saturday' 14-May-2022
/sysfs is one of the most popular kernel to user-space interface which you can leverage to add an interface to your Kernel code such as Kernel modules, Kernel Device Drivers, etc. Although personally I prefer /proc interface than other alternatives such as /sysfs, ioctl() and so on for my personal Kernel modules/stack. So here is my detailed multi-episode Youtube video series on /sysfs Interface.

Rockchip ROC-RK3566-PC from Firefly | OpenWRT ↗
Monday' 23-Jan-2023
Here is my multi-episode video series on evaluation of Rockchip ROC-RK3566-PC from Firefly with stock OpenWRT firmware.

Support, Donate and Contribute - The Linux Channel ↗
Saturday' 13-Mar-2021
Help shape the future and make an impact by donating/sponsor The Linux Channel. Your donation will transform lives !

Research Socket overhead in Linux vs Message Queues and benchmarking ↗
Saturday' 13-Mar-2021

Linux Kernel Data-Structures ↗
Saturday' 13-Mar-2021
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.

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Watch on Youtube - [466//0] 329 Tweaking Network Latency - Live Demo - via TOFFEE-DataCenter ↗

Linux Kernel Internals :: Linux Kernel Development ↗
Saturday' 13-Mar-2021

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Watch on Youtube - [959//0] x25a Kernel vs User-space | Library APIs | Kernel Programming | The Linux Channel ↗