calipso_skbuff_optptr(9)

📦 version 7.3.1, in nixpkgs unstable

✨ calipso_skbuff_optptr — the calipso_skbuff_optptr(9) glow-up ✨

okay so bestie, welcome to the kernel API manual for calipso_skbuff_optptr(9) — yes that (9) means it's a kernel function page, we're in the deep end of the pool today and honestly? iconic behaviour. 💅

🌸 NAME 🌸

calipso_skbuff_optptr — literally just: find the CALIPSO option in the packet. that's the whole job. that's the vibe. 🎀

🦋 SYNOPSIS 🦋

unsigned char * calipso_skbuff_optptr (const struct sk_buff *skb );

💜 ARGUMENTS 💜

  • skb — the packet. like. the actual packet. that's it, that's the parameter, she's not complicated. 🫶

🔥 DESCRIPTION 🔥

so what she does is: she parses the packet's IP header, looking for a CALIPSO option. that's the whole mission. 🔍

returns a pointer to the start of the CALIPSO option on success — slay — and NULL if one is not found. (yes the original says "if one if not found", we're keeping the typo energy, it's giving vintage. 💀)

so like, pointer = found it, NULL = she looked, she didn't find it, no cap. 🌈

⭐ SEE ALSO ⭐

the kernel file lives at ./net/ipv6/calipso.c and honestly the whole friend group is here, go say hi:

bestie reminder: this whole page is from ./net/ipv6, dated October 2026, and it's filed under calipso_skbuff_optptr(9) — so when you cite her, cite her correctly. periodt. 👑

go forth and find those options. mwah. 💖🧚✨

📦 where this page comes from