llc_build_and_send_ui_pkt(9)

💖 llc_build_and_send_ui_pkt(9) 💖

okay so bestie, welcome to the Kernel API Manual — this one's a little function called llc_build_and_send_ui_pkt, and it's literally the unitdata request interface for upper layers. yes it's a mouthful, no we're not scared of it. let's go ✨

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🌸 NAME 🌸

llc_build_and_send_ui_pkt — the unitdata request interface for upper layers 🫶

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🦋 SYNOPSIS 🦋

int llc_build_and_send_ui_pkt (struct llc_sap *sap , struct sk_buff *skb
, const unsigned char *dmac , unsigned char dsap );

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🎀 ARGUMENTS 🎀

• sap — the sap you're gonna use, iykyk 💅
• skb — the packet to send, the star of the show fr fr
• dmac — the destination mac address
• dsap — the destination sap

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✨ DESCRIPTION ✨

so here's the vibe: the upper layers call this function when the upper layer wants to send data using connection-less mode communication (that's a UI pdu, bestie 💜).

it accepts a data frame from the network layer that's meant to be sent using connection-less mode communication — and ngl, the timeout/retries situation is not this function's problem, that's handled by the network layer 👑. then it packages up the primitive as an event and sends it straight to the SAP event handler. slay.

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💀 SEE ALSO 💀

• Kernel file ./net/llc/llc_output.c
• llc_mac_hdr_init(9)

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that's the whole page, no cap 🌈 — source/version ./net/llc, dated October 2026 (the llc_build_and_send_ui_pkt(9) energy is eternal tho 💖✨🎀)