ptp_classify_raw(9)

💖 NAME 💖

okay so bestie, welcome to ptp_classify_raw(9) — the kernel API manual page that is literally here to classify a PTP packet. that’s the whole main-character job. 🎀✨

✨ SYNOPSIS ✨

unsigned int ptp_classify_raw (const struct sk_buff *skb );

🦋 ARGUMENTS 🦋

• skb — buffer. yes, just the buffer. the packet is in there. no cap. 💅

🌸 DESCRIPTION 🌸

so here’s the tea: it runs a minimal BPF dissector to classify a network packet and determine the PTP class. lowkey iconic. 🧚💖

if the skb does not contain any PTP protocol data, you get PTP_CLASS_NONE back. otherwise you get PTP_CLASS_V1_IPV{4,6}, PTP_CLASS_V2_IPV{4,6}, or PTP_CLASS_V2_{L2,VLAN} — depending on the packet content. that’s the classification lineup, periodt. 🔥👑

bestie note: the returned class depends on what’s actually inside the packet, so the answer isn’t one fixed thing for every single skb. 💀✨

👑 SEE ALSO 👑

kernel file ./include/linux/ptp_classify.h — yes, that file — plus these functions, bestie:

• ptp_parse_header(9)
• ptp_get_msgtype(9)
• ptp_check_diff8(9)
• ptp_header_update_correction(9)
• ptp_msg_is_sync(9)

mwah 💋 — source/version ./include/linux, date October 2026, page ptp_classify_raw(9). bye bestie, go classify something cute 🫶🌈