cipso_v4_genopt(9)

💖 cipso_v4_genopt(9) — Kernel API Manual 💖

okay so bestie, welcome to the kernel API manual for cipso_v4_genopt — yes that's the real title, I'm not making it up, it's literally the header of this page 🫶

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✨ NAME ✨

cipso_v4_genopt — Generate a CIPSO option 🎀

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🌸 SYNOPSIS 🌸

int cipso_v4_genopt (unsigned char *buf , u32 buf_len , const struct
cipso_v4_doi *doi_def , const struct netlbl_lsm_secattr *secattr );

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🦋 ARGUMENTS 🦋

• buf — the option buffer ✨ like, this is where the option goes
• buf_len — the size of opt_buf 💅 (yes, the page says opt_buf, and I'm not gonna lie to you and change it)
• doi_def — the CIPSO DOI to use 🎀
• secattr — the security attributes 👑

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🔥 DESCRIPTION 🔥

So here's the vibe: this function generates a CIPSO option using the DOI definition and the security attributes you pass in. It's giving "assemble the thing from the pieces you handed me" energy, no cap 💖

Returns the length of the option on success, and negative values on failure 😭 so like, check your return value, bestie. Periodt.

ngl, negative numbers means something went wrong — don't sleep on that.

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💜 SEE ALSO 💜

Kernel file ./net/ipv4/cipso_ipv4.c and its whole friend group — every single one, because we don't do "and others" here 🌈

• 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_parsetag_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_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)

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and that's the whole page, bestie 💅 before you go — cute lil sign-off: this cutie lives in ./net/ipv4, dated October 2026, and the footer's API tag is cipso_v4_genopt(9) ✨ 🦋 mwah, go read some source code 💖