cipso_v4_gentag_hdr(9)

📦 version 7.3.1, in nixpkgs unstable

✨ cipso_v4_gentag_hdr ✨

okay bestie, so this is a page from the Kernel API Manual (section 9, the kernel-functions girlies 💅) and it's all about cipso_v4_gentag_hdr — the little function that builds you a CIPSO option header. yes it's niche. yes it's iconic. let's get into it 🫶

🌸 NAME 🌸

cipso_v4_gentag_hdr — generate a CIPSO option header. that's it. that's the whole vibe. ✨

🎀 SYNOPSIS 🎀

void cipso_v4_gentag_hdr (const struct cipso_v4_doi *doi_def , unsigned
char *buf , u32 len );

literally a void function, so it returns nothing — it just does the thing and dips 😌

💖 ARGUMENTS 💖

  • doi_def — the DOI definition. like, the whole domain-of-interpretation situation, handed to you as a const struct cipso_v4_doi *. no cap, this is the important context 🗂️
  • buf — the CIPSO option buffer. this is the unsigned char * where the actual bytes live. hold it gently 🥺
  • len — the total tag length in bytes, not including this header. super important: it's the tag length sans header. not me almost forgetting that detail 😭

🦋 DESCRIPTION 🦋

Write a CIPSO header into the beginning of buffer. that's the assignment, that's the whole assignment. it writes the header, at the start of buf, done and dusted. main character energy from a tiny function honestly 👑

🌈 SEE ALSO 🌈

the whole extended friend group, in the kernel file ./net/ipv4/cipso_ipv4.c:

that's a lot of siblings bestie, and every single one of them is invited 💀💖

okayyy and that's the page!! 🧚 this lil manual entry lives under ./net/ipv4 and the version/date situation on the footer is October 2026 — so yeah, she's future-dated and thriving. go write that header, bestie, you're gonna slay 💅⭐

📦 where this page comes from