KarpelesLab / pktkit / 24006830663

53%

Build Type

push

github

Committed by MagicalTux

Commit Message

Add AF_XDP driver package for kernel-bypass L2 frame I/O

New afxdp/ package implementing pktkit.L2Device over Linux AF_XDP
sockets using only golang.org/x/sys/unix — no external libraries.

- UMEM shared memory with split RX/TX frame pools
- Lock-free ring buffers (fill, completion, RX, TX) with atomic ops
- Minimal eBPF XDP_REDIRECT program loaded via bpf() syscall
- XSKMAP management and netlink-based XDP program attachment
- Zero-copy mode with automatic copy-mode fallback
- Optional user-provided XSKMAP for custom BPF programs
- Follows tuntap driver pattern (goroutine poll loop, atomic handler)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Coverage Stats

39 of 665 new or added lines in 3 files covered. (5.86%)

7 existing lines in 1 file now uncovered.

7428 of 13907 relevant lines covered (53.41%)

26.14 hits per line