cfg80211_ba...nd_cac_abort(9)

📦 version 7.3.1, in nixpkgs unstable

✨ cfg80211_background_cac_abort(9) ✨

okay bestie, welcome to the Kernel API Manual — yes this page is literally titled cfg80211_ba...nd_cac_abort(9) because the name is so long it had to get cut off, and honestly? iconic of it. this is part 1 of a three-parter so don't go anywhere, we're just getting started 🫶

🎀 NAME 🎀

cfg80211_background_cac_abort — Channel Availability Check offchan abort event, no cap 💅

🌸 SYNOPSIS 🌸

void cfg80211_background_cac_abort (struct wiphy *wiphy );

that's it. that's the whole signature. one void, one function name, one pointer. she's minimal, she's clean, she ate 🔥

🦋 ARGUMENTS 🦋

  • wiphy — the wiphy. that's literally the whole description in the original and ngl we're keeping that energy. it's the wiphy. the wireless physical device thing. you know the one 💖

👑 DESCRIPTION 👑

so here's the vibe: this function gets called by the driver when a Channel Availability Check (CAC) gets aborted by a offchannel dedicated chain. that's the whole story, periodt.

  • the caller is the driver, not you, not your app, the driver
  • what's being aborted is a Channel Availability Check (CAC)
  • the thing doing the aborting is an offchannel dedicated chain

if that's your situation, congrats, this is your function. slay 🌈

okay that's the plot so far — part 2 is coming right up, don't touch that dial 🧚

🔗 SEE ALSO 🔗

okay so this is the part where the page goes full fangirl and shouts out literally every doc it's besties with 💅 and bestie, the friend group is HUGE. Like, this is not a "see also, three links" situation, this is a whole extended family reunion. We're talking the kernel header itself, every struct, every enum, every helper function, every subsystem page. All of them. No cap. So grab a snack, we're going through the whole contact list 🫶

The origin story first — everything here lives in the kernel file <pink>./include/net/cfg80211.h</pink>:

  • 🌱 where it all starts: ./include/net/cfg80211.h, Introduction(9), Device registration(9)

Then the band-and-capability girlies, aka every "what can this radio even do" struct:

Next up: the Actions and configuration era, lowkey the main character section of this whole header 🎀

🌸 Scanning and BSS list handling — the "who's out there" section, truly the nosiest part of the header (affectionate)

  • 🔍 scan structs: Scanning and BSS list handling(9), struct cfg80211_ssid(9), struct cfg80211_scan_info(9), struct cfg80211_scan_6ghz_params(9), struct cfg80211_scan_request(9), struct cfg80211_match_set(9), struct cfg80211_sched_scan_plan(9), struct cfg80211_bss_select_adjust(9), struct cfg80211_sched_scan_request(9), enum cfg80211_signal_type(9), struct cfg80211_inform_bss(9), struct cfg80211_bss_ies(9), struct cfg80211_bss(9), ieee80211_bss_get_elem(9), ieee80211_bss_get_ie(9)
  • 🔐 auth, assoc, deauth, disassoc, connect: struct cfg80211_auth_request(9), struct cfg80211_assoc_link(9), struct cfg80211_ml_reconf_req(9), enum cfg80211_assoc_req_flags(9), struct cfg80211_assoc_request(9), struct cfg80211_deauth_request(9), struct cfg80211_disassoc_request(9), struct cfg80211_ibss_params(9), struct cfg80211_bss_selection(9), struct cfg80211_connect_params(9), enum cfg80211_connect_params_changed(9), enum wiphy_params_flags(9), struct cfg80211_pmksa(9)
  • 😴 wowlan / coalesce / wakeup (the sleepover crew): struct cfg80211_pkt_pattern(9), struct cfg80211_wowlan_tcp(9), struct cfg80211_wowlan(9), struct cfg80211_coalesce_rules(9), struct cfg80211_coalesce(9), struct cfg80211_wowlan_nd_match(9), struct cfg80211_wowlan_nd_info(9), struct cfg80211_wowlan_wakeup(9), struct cfg80211_gtk_rekey_data(9), struct cfg80211_update_ft_ies_params(9), struct cfg80211_mgmt_tx_params(9), struct cfg80211_dscp_exception(9), struct cfg80211_dscp_range(9), struct cfg80211_qos_map(9)

🦋 Neighbor Awareness Networking (NAN) — yes it gets its own shoutout, it's iconic like that

  • 👑 the NAN collection: Neighbor Awareness Networking (NAN)(9), struct cfg80211_nan_band_config(9), struct cfg80211_nan_conf(9), struct cfg80211_nan_channel(9), struct cfg80211_nan_local_sched(9), struct cfg80211_nan_peer_map(9), struct cfg80211_nan_peer_sched(9), enum cfg80211_nan_conf_changes(9), struct cfg80211_nan_func_filter(9), struct cfg80211_nan_func(9)
  • 💌 pmk, external auth, FTM, PMSR, OWE: struct cfg80211_pmk_conf(9), struct cfg80211_external_auth_params(9), struct cfg80211_ftm_responder_stats(9), struct cfg80211_pmsr_ftm_result(9), struct cfg80211_pmsr_result(9), struct cfg80211_pmsr_ftm_request_peer(9), struct cfg80211_pmsr_request_peer(9), struct cfg80211_pmsr_request(9), struct cfg80211_update_owe_info(9), struct mgmt_frame_regs(9)

⭐ and now the big wiphy section, aka the whole personality of your wireless device ✨

💅 Utility functions — the little helpers that do the chores so you don't have to

🔥 Data path helpers — packet conversion hours, fr fr

🌍 Regulatory enforcement infrastructure + the internal regdb stuff, because the government wants to know your channel plans 🫶

and then the notification / BSS-reporting crowd 👑

📶 RFkill integration, Vendor commands and Test mode — three whole sections, we're not skipping a single one bestie 💀

and finally the grand finale — every rx/tx and notification function in the house, last but never least 🔥

that's genuinely every single one of them, bestie — not a single link left behind 💖 and the page isn't done with us yet, so stay tuned 👀

…and here's the rest of the squad, bestie — the whole SEE ALSO lineup, no skips, no "etc." cop-outs 💅

Okay bestie, that's genuinely the whole list — every single one, not a crumb left behind 🫶

And for the credits section, this page is sourced from ./include/net (that's where it lives, periodt) and it's tagged October 2026 — so yes, she's from the future, we don't question it 💅✨ Go read some kernel code, ily, bye 🎀

📦 where this page comes from