cipso_v4_parsetag_rng(9)

💅 cipso_v4_parsetag_rng(9) — the Kernel API Manual moment 🎀

okay bestie, so this is a page from the Kernel API Manual and it's literally all about one little function that reads a CIPSO ranged tag. it's giving "niche but iconic" energy, and honestly? we're obsessed. let's get into it ✨

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✨ NAME ✨

cipso_v4_parsetag_rng — Parse a CIPSO ranged tag 🌸

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🦋 SYNOPSIS 🦋

int cipso_v4_parsetag_rng (const struct cipso_v4_doi *doi_def , const
       unsigned char *tag , struct netlbl_lsm_secattr *secattr );

like, yes, that's the whole signature. she's a three-argument queen 👑

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💖 ARGUMENTS 💖

• doi_def — the DOI definition. that's her whole identity, do not question it 💅
• tag — the CIPSO tag. the actual thing we're parsing, main character energy fr fr
• secattr — the security attributes. this is where the parsed goodies get dropped off 🎀

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🌈 DESCRIPTION 🌈

so the vibe here is: we take a CIPSO ranged tag (and yes bestie, that's tag type #5, iykyk) and we parse it, then we hand back the security attributes in secattr. 🫶

and what does she return? okay so:

• returns zero on success ✨ (slay)
• returns negative values on failure 😭 (not slay, but we respect the honesty)

that's it. that's the whole function. short and iconic, periodt. 💀

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🔥 SEE ALSO 🔥

okay so there are a LOT of siblings in the kernel file ./net/ipv4/cipso_ipv4.c — like this is a whole family reunion and everyone showed up. no cap. here's the full guest list, every single one, not skipping anybody:

• cipso_v4_cache_entry_free(9)
• cipso_v4_map_cache_hash(9)
• cipso_v4_cache_init(9)
• cipso_v4_cache_invalidate(9)
• cipso_v4_cache_check(9)
• cipso_v4_cache_add(9)
• cipso_v4_doi_search(9)
• cipso_v4_doi_add(9)
• cipso_v4_doi_free(9)
• cipso_v4_doi_free_rcu(9)
• cipso_v4_doi_remove(9)
• cipso_v4_doi_getdef(9)
• cipso_v4_doi_putdef(9)
• cipso_v4_doi_walk(9)
• cipso_v4_map_lvl_valid(9)
• cipso_v4_map_lvl_hton(9)
• cipso_v4_map_lvl_ntoh(9)
• cipso_v4_map_cat_rbm_valid(9)
• cipso_v4_map_cat_rbm_hton(9)
• cipso_v4_map_cat_rbm_ntoh(9)
• cipso_v4_map_cat_enum_valid(9)
• cipso_v4_map_cat_enum_hton(9)
• cipso_v4_map_cat_enum_ntoh(9)
• cipso_v4_map_cat_rng_valid(9)
• cipso_v4_map_cat_rng_hton(9)
• cipso_v4_map_cat_rng_ntoh(9)
• cipso_v4_gentag_hdr(9)
• cipso_v4_gentag_rbm(9)
• cipso_v4_parsetag_rbm(9)
• cipso_v4_gentag_enum(9)
• cipso_v4_parsetag_enum(9)
• cipso_v4_gentag_rng(9)
• cipso_v4_gentag_loc(9)
• cipso_v4_parsetag_loc(9)
• cipso_v4_optptr(9)
• cipso_v4_validate(9)
• cipso_v4_error(9)
• cipso_v4_genopt(9)
• cipso_v4_sock_setattr(9)
• cipso_v4_req_setattr(9)
• cipso_v4_delopt(9)
• cipso_v4_sock_delattr(9)
• cipso_v4_req_delattr(9)
• cipso_v4_getattr(9)
• cipso_v4_sock_getattr(9)
• cipso_v4_skbuff_setattr(9)
• cipso_v4_skbuff_delattr(9)
• cipso_v4_init(9)

like, that's the whole group chat. every single one. 💜

and just so we're clear: cipso_v4_parsetag_rng is the ranged tag parser, cipso_v4_gentag_rng(9) is the one that generates it. don't mix them up bestie, that's a vibe check fail 🙈

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anywayyy, that's the page! this little beauty lives over in ./net/ipv4 and the doc is dated October 2026 — shoutout to the <cyan>Kernel API Manual</cyan> for keeping us fed with lore. go parse something cute today 🧚🍓💖