Kernel-Bypass Networking with XDP and AF_XDP: Line-Rate Packet Processing on Linux
A deep systems engineering guide to Linux kernel-bypass networking: why the standard Linux network stack caps out at high packet rates, the internal architecture of eXpress Data Path (XDP), action codes (XDP_DROP, XDP_TX, XDP_REDIRECT), zero-copy user-space networking with AF_XDP (XSK), and building a line-rate DDoS firewall in C.