tipc_ehdr_build(9)

💖 NAME 💖

okay so bestie, welcome to tipc_ehdr_build(9) from the Kernel API Manual — this is the function that builds the TIPC encryption message header, and it’s lowkey iconic ✨

tipc_ehdr_build — Build TIPC encryption message header 📨

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✨ SYNOPSIS ✨

here’s the signature, copied exactly because we do not vibe-edit types in this house 🫶

int tipc_ehdr_build (struct net *net , struct tipc_aead *aead , u8
tx_key , struct sk_buff *skb , struct tipc_crypto *__rx );

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🎀 ARGUMENTS 🎀

• net — a struct net 🫶
• aead — the TX AEAD key to be used for the message encryption, literally the key in charge 🔥
• tx_key — the key id used for the message encryption 🔑
• skb — the input/output message skb, it goes in and comes back out 🎀
• __rx — the RX crypto handle if the destination is "known" 👀

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💀 RETURN 💀

if the building is successful, you get the header size back; otherwise it’s < 0 😭

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🌈 SEE ALSO 🌈

the kernel file is ./net/tipc/crypto.c, and the whole entourage is here:

• struct tipc_tfm(9)
• struct tipc_aead(9)
• struct tipc_crypto_stats(9)
• struct tipc_crypto(9)
• tipc_aead_key_validate(9)
• tipc_aead_key_generate(9)
• tipc_aead_free(9)
• tipc_aead_tfm_next(9)
• tipc_aead_init(9)
• tipc_aead_clone(9)
• tipc_aead_mem_alloc(9)
• tipc_aead_encrypt(9)
• tipc_aead_decrypt(9)
• tipc_ehdr_validate(9)
• tipc_crypto_key_init(9)
• tipc_crypto_key_attach(9)
• tipc_crypto_key_try_align(9)
• tipc_crypto_key_pick_tx(9)
• tipc_crypto_key_synch(9)
• tipc_crypto_xmit(9)
• tipc_crypto_rcv(9)
• tipc_crypto_msg_rcv(9)
• tipc_crypto_key_distr(9)
• tipc_crypto_key_xmit(9)
• tipc_crypto_key_rcv(9)
• tipc_crypto_work_rx(9)
• tipc_crypto_rekeying_sched(9)
• tipc_crypto_work_tx(9)

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kisses and good vibes from ./net/tipc, October 2026 — your fave kernel bestie is signing off 💅💖