llc_sap_action_test_ind(9)

💖 llc_sap_action_test_ind(9) 💖

okay so bestie, welcome to the Kernel API Manual — this one's a little function from the llc corner of the kernel and she's got a very specific job. let's get into it ✨

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🌸 NAME 🌸

llc_sap_action_test_ind — the girl who sends a TEST PDU up to the net layer via TEST IND, no cap 💅

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🦋 SYNOPSIS 🦋

int llc_sap_action_test_ind (struct llc_sap *sap , struct sk_buff *skb );

that's it, that's the whole signature. returns an int, takes two args, and she's ready to go 🎀

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🍓 ARGUMENTS 🍓

• sap — the SAP. yeah. that's the whole description. it's a struct llc_sap * and it's literally called SAP. iconic minimalism honestly 👑
• skb — the event to send. this is the payload/event that's getting shipped off 💌

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🔥 DESCRIPTION 🔥

so what she actually does: she sends a TEST response PDU to the network layer via a TEST INDICATION primitive. that's the whole vibe. TEST PDU out, TEST IND in 🧚

she also verifies that our event is a PDU type event — like a little vibe check before the actual work, y'know? gotta make sure the event is what it claims to be first 💅

fr fr that's the entire description. no extra lore, no secret behaviour — send the PDU, check the event type, done. periodt. ✨

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💜 SEE ALSO 💜

• the kernel file ./net/llc/llc_s_ac.c 👀
• llc_sap_action_unitdata_ind(9)
• llc_sap_action_send_ui(9)
• llc_sap_action_send_xid_c(9)
• llc_sap_action_send_xid_r(9)
• llc_sap_action_send_test_c(9)
• llc_sap_action_report_status(9)
• llc_sap_action_xid_ind(9)

the whole friend group is in ./net/llc and honestly they all ate 🫶

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🌈 sign-off time: this little page lives under ./net/llc and it's dated October 2026 — so yeah, she's from the future, she's in the kernel, she's sending TEST PDUs. main character energy only 💀💖 mwah, go read your kernel source bestie 😭🎀