llc_util_nr_...de_tx_window(9)

🌸 llc_util_nr_...de_tx_window(9) 🌸

okay bestie so we're in the Kernel API Manual today, and the page title up top is literally llc_util_nr_...de_tx_window(9) — yes it's truncated, yes that's how it's printed, no we don't fix it, it's giving mysterious-and-iconic 💅

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✨ NAME ✨

llc_util_nr_inside_tx_window — the little function that checks if a sequence number is in the tx window 🎀

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🦋 SYNOPSIS 🦋

u16 llc_util_nr_inside_tx_window (struct sock *sk , u8 nr );

that's it. two args. that's the whole vibe ✨

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💖 ARGUMENTS 💖

• sk — the current connection, like, the whole situation we're checking against 🫶
• nr — the N(R) of the received PDU, aka the number that just showed up at the door 🙈

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🌈 DESCRIPTION 🌈

okay so here's the tea, no cap ☕

This routine checks if the N(R) of the received PDU is in range of the transmit window — vibe check on the number, basically 🎀 On the other hand (yes, on the other hand, we contain multitudes 💅), it also checks if the received PDU acknowledges some outstanding PDUs that are in transmit window. like, is this packet out here giving credit where credit is due 👑

Returns 0 for success, 1 otherwise. that's the whole personality, lowkey 🦋

fr fr remember: 0 = success, 1 = otherwise. don't get it twisted, bestie 😭

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👑 SEE ALSO 👑

• kernel file ./net/llc/llc_c_ev.c
• llc_util_ns_inside_rx_window(9)
• llc_conn_ev_qlfy_last_frame_eq_1(9)
• llc_conn_ev_qlfy_last_frame_eq_0(9)

go read those too, iykyk 📚✨

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🎀 sign-off 🎀

this whole thing lives in ./net/llc and the date on it is October 2026 — so yeah, future-flavored kernel lore ⭐ obsessed. anyway ily, go check those tx windows, slay 💜🧚‍♀️