skb_tcp_all_headers(9)

skb_tcp_all_headers(9) — Kernel API Manual 🫶✨

🌸 NAME 🌸

Okay so bestie, skb_tcp_all_headers is the kernel helper that returns the size of all the headers for a TCP packet. That's it. That's the whole name. No cap. 💅

✨ SYNOPSIS ✨

The signature is literally:

int skb_tcp_all_headers (const struct sk_buff *skb );

🎀 ARGUMENTS 🎀

• skb — the buffer. That's the argument, bestie. 🫶

💖 DESCRIPTION 💖

Okay so this one is used in the TX path, for a packet that is known to be a TCP one. Like, you already know it's TCP — this helper is not out here doing detective work, okay? 😭

Here's the snippet from the page, verbatim:

if (skb_is_gso(skb)) { int hlen = skb_tcp_all_headers(skb); ...

The page literally trails off with ... right there. Not hiding anything, just keeping the vibe mysterious. 🙈

🌈 SEE ALSO 🌈

• Kernel file ./include/linux/tcp.h — the kernel file, bestie. 📂
• skb_inner_tcp_all_headers(9) — the other reference to go peek at. 👀

source/version: ./include/linux · date: October 2026 — mwah, bestie, that's the page 💋✨