cfg80211_chandef_add_npca(9)

📦 version 7.3.1, in nixpkgs unstable

🦋 cfg80211_chandef_add_npca 🦋

okay so this is from the Kernel API Manual, bestie — the manual name is folded right in here: cfg80211_chandef_add_npca(9). It’s literally giving “parse and add NPCA information to chandef” energy ✨

💖 NAME 💖

cfg80211_chandef_add_npca — parse and add NPCA information to chandef

✨ SYNOPSIS ✨

int cfg80211_chandef_add_npca (struct wiphy *wiphy , struct
       cfg80211_chan_def *chandef , const struct ieee80211_uhr_npca_info *npca
       );

🎀 ARGUMENTS 🎀

  • wiphy — the wiphy this will be used for, for channel pointer lookup 👑
  • chandef — the chandef to modify, must be a valid chandef without NPCA. no cap, it has to be valid and NPCA-free already 💅
  • npca — the NPCA information, can be NULL. yes bestie, NULL is allowed 🫶

🌈 RETURN 🌈

0 if the NPCA information was added and the resulting chandef is valid, a negative error code on errors 🦋

👀 SEE ALSO 👀

Okay bestie, this is the part where the page hands you the entire extended friend group — every single (9) page in the cfg80211 cinematic universe. It's a lot, but each one is literally one man command away, and they all ate. Go say hi. 💅

🌸 the opening credits

🎀 actions & configuration energy

✨ the survey / AP / station struct squad

  • enum survey_info_flags(9)
  • struct survey_info(9)
  • struct cfg80211_crypto_settings(9)
  • struct cfg80211_mbssid_config(9)
  • struct cfg80211_mbssid_elems(9)
  • struct cfg80211_rnr_elems(9)
  • struct cfg80211_beacon_data(9)
  • struct cfg80211_acl_data(9)
  • struct cfg80211_fils_discovery(9)
  • struct cfg80211_unsol_bcast_probe_resp(9)
  • struct cfg80211_s1g_short_beacon(9)
  • struct cfg80211_ap_settings(9)
  • struct cfg80211_ap_update(9)
  • struct cfg80211_csa_settings(9)
  • struct cfg80211_color_change_settings(9)
  • struct iface_combination_params(9)
  • enum station_parameters_apply_mask(9)
  • struct sta_txpwr(9)
  • struct link_station_parameters(9)
  • struct link_station_del_parameters(9)
  • struct cfg80211_ttlm_params(9)
  • struct station_parameters(9)
  • struct station_del_parameters(9)
  • enum cfg80211_station_type(9)
  • cfg80211_check_station_change(9)
  • enum rate_info_flags(9)
  • enum rate_info_bw(9)
  • struct rate_info(9)
  • enum bss_param_flags(9)
  • struct sta_bss_parameters(9)
  • struct cfg80211_txq_stats(9)
  • struct cfg80211_tid_stats(9)
  • struct link_station_info(9)
  • struct station_info(9)
  • struct cfg80211_sar_sub_specs(9)
  • struct cfg80211_sar_specs(9)
  • struct cfg80211_sar_freq_ranges(9)
  • struct cfg80211_sar_capa(9)
  • cfg80211_get_station(9)
  • enum monitor_flags(9)
  • enum mpath_info_flags(9)
  • struct mpath_info(9)
  • enum wiphy_bss_param_flags(9)
  • struct bss_parameters(9)
  • struct mesh_config(9)
  • struct mesh_setup(9)
  • struct ocb_setup(9)
  • struct ieee80211_txq_params(9)

🦋 scanning & BSS list handling (the lore drop)

  • 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)
  • 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)
  • 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)

💜 NAN, auth, PMSR, OWE & mgmt frame regs

  • 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)
  • 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)

👑 wiphy core cast (main character energy)

  • struct cfg80211_ops(9)
  • enum wiphy_flags(9)
  • struct ieee80211_iface_limit(9)
  • struct ieee80211_iface_combination(9)
  • enum wiphy_wowlan_support_flags(9)
  • struct wiphy_wowlan_support(9)
  • struct wiphy_coalesce_support(9)
  • enum wiphy_vendor_command_flags(9)
  • enum wiphy_opmode_flag(9)
  • struct sta_opmode_info(9)
  • struct wiphy_vendor_command(9)
  • struct wiphy_iftype_ext_capab(9)
  • cfg80211_get_iftype_ext_capa(9)
  • struct cfg80211_pmsr_capabilities(9)
  • struct wiphy_iftype_akm_suites(9)
  • struct wiphy_radio_cfg(9)
  • struct wiphy_radio_freq_range(9)
  • struct wiphy_radio(9)
  • enum wiphy_nan_flags(9)
  • struct wiphy_nan_capa(9)
  • struct wiphy(9)

🧚 wiphy helper besties

🌈 wireless dev & utility functions

🍓 data path helpers + element hunting

🧚 regulatory enforcement & internal regdb

⭐ scan/BSS notification besties

🔥 RFkill, vendor commands & test mode

🫶 connect / roam / disconnect notifications

💖 rx/tx mgmt & the final notification crew

like. the whole regulatory-and-chandef friend group, obviously 💅 they all live in the same group chat as this page, so if you're vibing with NPCA you're gonna be vibing with them next.

the device-lifecycle girlies 🎀 register, unregister, and one tdls request for flavour. also bitrate, because someone has to do the math.

ft event besties + the p2p attr icon. yes, struct cfg80211_ft_event_params(9) is a struct page, not a function — she's built different 🦋

splitting and fragmenting IEs, the way that they just… do that 😭

wakeup reporting, crit proto stopping, and counting your channels. unbothered, moisturized, in their lane ✨

combinations checks, iteration, radio index — and then the three that shut stuff down (link, iface, all interfaces). not the fun ones but somebody has to 🙈

the ext-feature set/isset duo, genuinely obsessed with them 🫶

ok the NAN era begins 💀 free it, match it, terminate it, done the sched update — and don't forget struct cfg80211_nan_match_params(9) is a struct page, iykyk.

external auth, pmsr report + complete, iftype checking, assoc comeback (she always comes back 🔥) and the owe info update.

the bss flush + colour era 🌈 collision, started, aborted, notified — and cfg80211_6ghz_power_type(9) just chilling at the end of the block.

mlo reconf besties, links removed, scheduled channel checks, epcs changed. patient, powerful, lowkey iconic 👑

NAN part two, the sequel nobody asked for but everybody needed 💀 next dw notif, cluster joined, ulw update, channel evac.

debugfs read/write under lock, the s1g freq trio (start, end, primary sibling — she's got range 💜) and the incumbent signal notify to close the whole list out.

ok that's genuinely the whole see-also family, bestie 🧚 if you made it this far you're a real one, fr fr.

and that's the page! source lived in ./include/net, version/date stamp says October 2026, and the whole lovely thing is filed under cfg80211_chandef_add_npca(9) — go forth and add your NPCA channels responsibly 💖✨🎀

📦 where this page comes from