Linux Networking Subsystem, 2004 for Linux Kernel 2.4.18
Linux Kernel Networking (Presentation), 2007 for Linux Kernel 2.6.23
A Map of the Networking Code in Linux Kernel 2.4.20, 2004

O’Reilly

Understanding the Linux Kernel, 3rd Edition, 2005
Understanding Linux Network Internals, 2005
Linux Device Drivers, 3rd Edition, 2005

Oracle Linux: 6.7 About Network Device Drivers
linux network drivers — net_device_ops
struct net_device and net_device_ops

Understanding TCP/IP Network Stack & Writing Network Apps
Networking in the Linux Kernel
Queueing in the Linux Network Stack
Scaling in the Linux Networking Stack (TXT)
Networking › kernel_flow
Single RX queue kernel bypass in Netmap for high packet rate networking

struct net_device, struct net

what is the difference between register_pernet_subsys and register_pernet_device?
Getting list of network devices inside the Linux kernel

#include <linux/netdevice.h>

struct net_device *dev;

dev = first_net_device(&init_net);
while (dev) {
    printk(KERN_INFO "found [%s]\n", dev->name);
    dev = next_net_device(dev);
}