llc_pdu_header_init(9)

📦 version 7.3.1, in nixpkgs unstable

💅 llc_pdu_header_init — bestie's guide to the kernel API manual (section 9) 🎀

Okay so like, hi, welcome to the Kernel API Manual, section 9, and today's main character is llc_pdu_header_init(9). Buckle up, it's giving "tiny function, huge slay" ✨

🌸 NAME 🌸

llc_pdu_header_init — literally initializes the pdu header. That's it, that's the whole job, and she does it beautifully 💖

✨ SYNOPSIS ✨

void llc_pdu_header_init (struct sk_buff *skb , u8 type , u8 ssap , u8
dsap , u8 cr );

No cap, that's the exact signature — copy it character for character or the compiler will simply end you 😭

🦋 ARGUMENTS 🦋

  • skb — the input skb that the header must be set into. She's the canvas, the moment, the whole vibe check 🫶
  • type — type of PDU, and it's one of U, I or S. Only those three, bestie, don't get creative 💅
  • ssap — source sap. Yes bb, source 🌟
  • dsap — destination sap. The destination, obviously, we love a journey 🧚
  • cr — command/response bit, and it's 0 or 1. Binary queen, no in-between 👑

🔥 DESCRIPTION 🔥

So what does she actually do? The way that this function sets DSAP, SSAP and the command/Response bit in the LLC header. That's the whole glow-up: three little fields, one iconic function call 💖✨

It's not deep, it's not dramatic, but it is essential — the LLC header does not become itself without her, iykyk 💀

🌈 SEE ALSO 🌈

That's the whole friend group, fr fr — decode squad on one side, init squad on the other 🫶💜

💡 reminder bb: all those (9) refs are their own manual pages, so if you're lost, that's literally where you go next ⭐

And that's a wrap, bestie! 🌸 Signing off from ./include/net, dated October 2026, in the Kernel API Manual — llc_pdu_header_init(9) out 💅🎀💖

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