llc_conn_rtn_pdu(9)

📦 version 7.3.1, in nixpkgs unstable

💖 llc_conn_rtn_pdu — a Kernel API Manual moment 💖

okay so bestie, we're in the kernel API manual today and this one is a function page — llc_conn_rtn_pdu — and it is literally the little messenger that hands your received data pdu up to the upper layer. group chat energy, but make it networking. 🦋

✨ SYNOPSIS ✨

void llc_conn_rtn_pdu (struct sock *sk , struct sk_buff *skb );

that's it. that's the whole signature. no return value, no drama, void and gone. 💅

🎀 ARGUMENTS 🎀

  • sk — the active connection. your main character socket, the one currently doing the thing. 👑
  • skb — the received data frame. the actual lil packet payload that showed up and needs to go upstairs. 🍓

🌸 DESCRIPTION 🌸

So what does it do?? It sends the received data pdu to the upper layer — by using the indicate function. that's the whole vibe. ✨

Along the way it gets the service parameters ready (prim and prim_data) so everything's prepped and cute before the handoff. 🎀

Now here's the key deets, no cap: actually calling the indication function does not happen here. nope. that gets done in llc_conn_state_process. so this function is like the friend who packs your bag for you and then hands it off — the actual going-to-school moment happens later. 🫶

ngl that's an important one to remember — this is prep + return, not the call itself. the call lives in llc_conn_state_process. iykyk 💀

🔥 SEE ALSO 🔥

Kernel file ./net/llc/llc_conn.c and honestly the whole friend group:

and that's the page, bestie 💜 this one ships out of ./net/llc, dated October 2026, in the Kernel API Manual — go forth and indicate responsibly. mwah 🧚✨

📦 where this page comes from