cipso_v4_map_cat_rng_ntoh(9)

📦 version 7.3.1, in nixpkgs unstable

💅 cipso_v4_map_cat_rng_ntoh — the kernel API manual, bestie edition

okay so bestie, imagine this page lives in the Kernel API Manual, and today's main character is cipso_v4_map_cat_rng_ntoh. yes that name is a mouthful, no we are not shortening it, it's iconic and we respect it 🎀

✨ NAME ✨

cipso_v4_map_cat_rng_ntoh — literally does a category mapping, but like… from network to host. that's the whole vibe. 🦋

🫶 SYNOPSIS 🫶

int cipso_v4_map_cat_rng_ntoh (const struct cipso_v4_doi *doi_def ,
const unsigned char *net_cat , u32 net_cat_len , struct
netlbl_lsm_secattr *secattr );

she takes four things and returns an int, periodt. 💅

👑 ARGUMENTS 👑

  • doi_def — the DOI definition. that's her whole reference point, the blueprint, the source of truth ✨
  • net_cat — the category list in network/CIPSO format. i.e. the data still dressed in its network-format little outfit 🌸
  • net_cat_len — the length of the CIPSO bitmap in bytes. yes, bytes, note it, write it down 🎀
  • secattr — the security attributes. this is where the mapped result is headed 🧚

💖 DESCRIPTION 💖

so what she actually does is perform a label mapping — translating a CIPSO category list into the correct local MLS category bitmap, using the DOI definition you handed her. like a translator but for categories, no cap 🌈

and the return situation? she returns zero on success, and negative values on failure. that's it, that's the contract, don't @ me. 😭

🦋 SEE ALSO 🦋

bestie there are SO many siblings, okay, they all live in the kernel file ./net/ipv4/cipso_ipv4.c — here's the full family scroll, not skipping a single one 🫶

ok and one little lore drop before you go: this page comes from the kernel file ./net/ipv4/cipso_ipv4.c, the source is ./net/ipv4, and the date on it is October 2026. so like, future-core of the kernel API manual 🌸

and that's the whole page, bestie — you ate it up, i'm obsessed, mwah 💋💜

📦 where this page comes from