cfg80211_te...oc_event_skb(9)

💅 NAME 💅

cfg80211_testmode_alloc_event_skb — allocate testmode event

okay so real talk, this is from the Kernel API Manual (section 9, the kernel-API girlies), and the whole vibe of this function is: it makes you an event skb. that's it, that's the function. slay.

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✨ SYNOPSIS ✨

struct sk_buff * cfg80211_testmode_alloc_event_skb (struct wiphy *wiphy
, int approxlen , gfp_t gfp );

like yes, that's the whole signature, look at her go 🫶

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🎀 ARGUMENTS 🎀

• wiphy — the wiphy. that's the whole description bestie, she speaks for herself 💅
• approxlen — an upper bound of the length of the data that will be put into the skb. so like, a ceiling, not an exact number, don't come for her 🌸
• gfp — allocation flags. the classic.

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🦋 DESCRIPTION 🦋

so what she does is: allocates and pre-fills an skb for an event on the testmode multicast group. iconic behavior honestly ✨

the returned skb is set up in the same way as with cfg80211_testmode_alloc_reply_skb — but it's prepared for an event instead. and just like there, you should simply add data to it, and that data will then end up in the NL80211_ATTR_TESTDATA attribute. easy!

🚨 and again — you must not modify the skb in any other way. like, at all. hands off the rest of it, i'm serious 😭

when you're done filling the skb, call cfg80211_testmode_event with the skb to send the event. that's the sending part. you're welcome 💖

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👑 RETURN 👑

an allocated and pre-filled skb. and NULL if any errors happen — so like, check for that, bestie, fr fr 🙈

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✨ more coming, don't go anywhere ✨

✨ SEE ALSO ✨

okay bestie, brace yourself — this is the part where the manpage just dumps an entire syllabus on you. every single one of these is a real cross-reference into section 9 of the kernel API manual, and we are listing all of them. no skimming, no skipping. 💅

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🌸 the starting point

• Kernel file ./include/net/cfg80211.h Introduction(9), Device registration(9)

that's the door, that's the hallway. now the actual rooms 👇

🦋 band, channel & capability vibes

• enum ieee80211_channel_flags(9), struct ieee80211_channel(9), enum ieee80211_rate_flags(9), enum ieee80211_bss_type(9), enum ieee80211_privacy(9), struct ieee80211_rate(9)
• struct ieee80211_he_obss_pd(9), struct cfg80211_he_bss_color(9), struct ieee80211_sta_ht_cap(9), struct ieee80211_sta_vht_cap(9), struct ieee80211_sta_he_cap(9)
• struct ieee80211_eht_mcs_nss_supp(9), struct ieee80211_sta_eht_cap(9), struct ieee80211_sta_uhr_cap(9), struct ieee80211_sband_iftype_data(9)
• enum ieee80211_edmg_bw_config(9), struct ieee80211_edmg(9), struct ieee80211_sta_s1g_cap(9), struct ieee80211_supported_band(9)
• _ieee80211_set_sband_iftype_data(9), ieee80211_set_sband_iftype_data(9), for_each_sband_iftype_data(9), ieee80211_get_sband_iftype_data(9), ieee80211_get_he_iftype_cap(9), ieee80211_get_he_6ghz_capa(9), ieee80211_get_eht_iftype_cap(9), ieee80211_get_uhr_iftype_cap(9), wiphy_read_of_freq_limits(9)

💖 Actions and configuration(9) — the whole cluster

• struct vif_params(9), struct key_params(9), struct cfg80211_chan_def(9), struct cfg80211_tid_cfg(9), struct cfg80211_tid_config(9), struct cfg80211_fils_aad(9), struct cfg80211_set_hw_timestamp(9)
• cfg80211_get_chandef_type(9), cfg80211_chandef_create(9), cfg80211_chandef_identical(9), cfg80211_chandef_is_edmg(9), cfg80211_chandef_is_s1g(9), cfg80211_chandef_compatible(9)
• nl80211_chan_width_to_mhz(9), cfg80211_chandef_get_width(9), cfg80211_chandef_valid(9), cfg80211_chandef_usable(9), cfg80211_chandef_dfs_required(9), cfg80211_chandef_dfs_usable(9), cfg80211_chandef_dfs_cac_time(9)
• cfg80211_chandef_primary(9), cfg80211_chandef_npca_valid(9), cfg80211_chandef_add_npca(9), cfg80211_chandef_add_dbe(9), nl80211_send_chandef(9), ieee80211_chandef_max_power(9), cfg80211_chandef_s1g_pri_width(9), cfg80211_any_usable_channels(9)
• 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)

like… that's one heading's worth of friends. iconic behaviour honestly. 👑

🎀 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)

🦋 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)

NAN girlies rise 🫶 (and if you don't know what NAN means here, that's literally what the reference is for, iykyk)

🌈 and then it just keeps going

• 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), 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)

💜 the wiphy lifecycle gang

• wiphy_priv(9), priv_to_wiphy(9), set_wiphy_dev(9), wiphy_dev(9), wiphy_name(9), wiphy_new_nm(9), wiphy_new(9), wiphy_register(9)
• rcu_dereference_wiphy(9), wiphy_dereference(9), get_wiphy_regdom(9), wiphy_unregister(9), wiphy_free(9), wiphy_lock(9), wiphy_unlock(9)
• wiphy_work_queue(9), wiphy_work_cancel(9), wiphy_work_flush(9), wiphy_delayed_work_queue(9), wiphy_delayed_work_cancel(9), wiphy_delayed_work_flush(9), wiphy_delayed_work_pending(9)
• wiphy_hrtimer_work_queue(9), wiphy_hrtimer_work_cancel(9), wiphy_hrtimer_work_flush(9), wiphy_hrtimer_work_pending(9)

the way this list has four almost-identical work-function families and each one gets its own page… highkey committed. 😭

🎀 the wireless_dev corner

• enum ieee80211_ap_reg_power(9), struct wireless_dev(9), wdev_priv(9), wdev_chandef(9)

⭐ Utility functions(9)

• ieee80211_channel_equal(9), ieee80211_channel_to_khz(9), ieee80211_channel_to_freq_khz(9), ieee80211_channel_to_frequency(9), ieee80211_freq_khz_to_channel(9), ieee80211_frequency_to_channel(9), ieee80211_get_channel_khz(9), ieee80211_get_channel(9)
• cfg80211_channel_is_psc(9), ieee80211_radio_freq_range_valid(9), cfg80211_radio_chandef_valid(9), cfg80211_wdev_channel_allowed(9)
• ieee80211_get_response_rate(9), ieee80211_mandatory_rates(9), struct ieee80211_radiotap_iterator(9), ieee80211_get_hdrlen_from_skb(9), ieee80211_hdrlen(9), ieee80211_get_mesh_hdrlen(9)

🧚 Data path helpers(9)

• ieee80211_data_to_8023_exthdr(9), ieee80211_data_to_8023(9), ieee80211_is_valid_amsdu(9), ieee80211_amsdu_to_8023s(9), ieee80211_get_8023_tunnel_proto(9), ieee80211_strip_8023_mesh_hdr(9)
• cfg80211_classify8021d(9), cfg80211_find_elem_match(9), cfg80211_find_ie_match(9), cfg80211_find_elem(9), cfg80211_find_ie(9), cfg80211_find_ext_elem(9), cfg80211_find_ext_ie(9), cfg80211_find_vendor_elem(9), cfg80211_find_vendor_ie(9)
• enum cfg80211_rnr_iter_ret(9), cfg80211_iter_rnr(9), cfg80211_defragment_element(9), cfg80211_send_layer2_update(9)

🔥 Regulatory enforcement infrastructure(9)

• regulatory_hint(9), regulatory_set_wiphy_regd(9), regulatory_set_wiphy_regd_sync(9), wiphy_apply_custom_regulatory(9), freq_reg_info(9), reg_initiator_name(9), regulatory_pre_cac_allowed(9)

🌸 Internal regulatory db functions(9)

• reg_query_regdb_wmm(9)

just the one. and honestly? she's that girl. 💅

💖 BSS notify & mgmt goodies

• cfg80211_scan_done(9), cfg80211_sched_scan_results(9), cfg80211_sched_scan_stopped(9), cfg80211_sched_scan_stopped_locked(9)
• cfg80211_inform_bss_frame_data(9), cfg80211_gen_new_bssid(9), cfg80211_is_element_inherited(9), cfg80211_merge_profile(9), enum cfg80211_bss_frame_type(9), cfg80211_get_ies_channel_number(9), cfg80211_ssid_eq(9)
• cfg80211_inform_bss_data(9), __cfg80211_get_bss(9), cfg80211_get_bss(9), cfg80211_ref_bss(9), cfg80211_put_bss(9), cfg80211_unlink_bss(9), cfg80211_bss_iter(9)
• cfg80211_rx_mlme_mgmt(9), cfg80211_auth_timeout(9), struct cfg80211_rx_assoc_resp_data(9), cfg80211_rx_assoc_resp(9), struct cfg80211_assoc_failure(9), cfg80211_assoc_failure(9)
• cfg80211_tx_mlme_mgmt(9), cfg80211_rx_unprot_mlme_mgmt(9), cfg80211_michael_mic_failure(9), cfg80211_ibss_joined(9), cfg80211_notify_new_peer_candidate(9)

🌈 RFkill integration(9)

• wiphy_rfkill_set_hw_state_reason(9), wiphy_rfkill_start_polling(9), wiphy_rfkill_stop_polling(9)

three functions, zero notes, slay ⭐

👑 Vendor commands(9)

• cfg80211_vendor_cmd_alloc_reply_skb(9), cfg80211_vendor_cmd_reply(9), cfg80211_vendor_cmd_get_sender(9), cfg80211_vendor_event_alloc(9), cfg80211_vendor_event_alloc_ucast(9), cfg80211_vendor_event(9)

🍓 Test mode(9)

• cfg80211_testmode_alloc_reply_skb(9), cfg80211_testmode_reply(9), cfg80211_testmode_event(9)

💜 connection / roaming / station notification squad

• struct cfg80211_fils_resp_params(9), struct cfg80211_connect_resp_params(9), cfg80211_connect_done(9), cfg80211_connect_bss(9), cfg80211_connect_result(9), cfg80211_connect_timeout(9)
• struct cfg80211_roam_info(9), cfg80211_roamed(9), cfg80211_port_authorized(9), cfg80211_disconnected(9)
• cfg80211_ready_on_channel(9), cfg80211_remain_on_channel_expired(9), cfg80211_tx_mgmt_expired(9)
• cfg80211_sinfo_alloc_tid_stats(9), cfg80211_link_sinfo_alloc_tid_stats(9), cfg80211_sinfo_release_content(9)
• cfg80211_new_sta(9), cfg80211_del_sta_sinfo(9), cfg80211_del_sta(9), cfg80211_conn_failed(9)

🎀 mgmt tx/rx & control port crew

• struct cfg80211_rx_info(9), cfg80211_rx_mgmt_ext(9), cfg80211_rx_mgmt_khz(9), cfg80211_rx_mgmt(9)
• struct cfg80211_tx_status(9), cfg80211_mgmt_tx_status_ext(9), cfg80211_mgmt_tx_status(9), cfg80211_control_port_tx_status(9), cfg80211_rx_control_port(9)

🦋 CQM, radar & the final batch

• cfg80211_cqm_rssi_notify(9), cfg80211_cqm_pktloss_notify(9), cfg80211_cqm_txe_notify(9), cfg80211_cqm_beacon_loss_notify(9)
• __cfg80211_radar_event(9), cfg80211_sta_opmode_change_notify(9), cfg80211_cac_event(9), cfg80211_background_cac_abort(9)
• cfg80211_gtk_rekey_notify(9), cfg80211_pmksa_candidate_notify(9), cfg80211_rx_spurious_frame(9), cfg80211_rx_unexpected_4addr_frame(9)
• cfg80211_probe_status(9), cfg80211_report_obss_beacon_khz(9), cfg80211_report_obss_beacon(9), struct cfg80211_beaconing_check_config(9)

and that's where this stretch of the list lands — lowkey a lot, highkey worth it. still more coming, don't you dare close the tab 💖

okay so before you close the tab — these are the neighbouring pages 🫶 like, if cfg80211_te...oc_event_skb(9) wasn't the one you wanted (tragic, but it happens), one of these 64 icons almost definitely is. Go click around, that's what they're there for, iykyk 💅

💅 the reg / beacon / channel-switch girlies

• cfg80211_reg_check_beaconing(9)
• cfg80211_reg_can_beacon(9)
• cfg80211_reg_can_beacon_relax(9)
• cfg80211_ch_switch_notify(9)
• cfg80211_ch_switch_started_notify(9)
• ieee80211_operating_class_to_band(9)
• ieee80211_operating_class_to_chandef(9)
• ieee80211_chandef_to_operating_class(9)
• ieee80211_chandef_to_khz(9)

🎀 tdls, bitrate math & the whole register/unregister saga

• cfg80211_tdls_oper_request(9)
• cfg80211_calculate_bitrate(9)
• cfg80211_unregister_wdev(9)
• cfg80211_register_netdevice(9)
• cfg80211_unregister_netdevice(9)
• struct cfg80211_ft_event_params(9)
• cfg80211_ft_event(9)
• cfg80211_get_p2p_attr(9)

🦋 ie splitting, wakeup reports & combos

• ieee80211_ie_split_ric(9)
• ieee80211_ie_split(9)
• ieee80211_fragment_element(9)
• cfg80211_report_wowlan_wakeup(9)
• cfg80211_crit_proto_stopped(9)
• ieee80211_get_num_supported_channels(9)
• cfg80211_check_combinations(9)
• cfg80211_iter_combinations(9)
• cfg80211_get_radio_idx_by_chan(9)

🔥 stopping stuff, ext features & nan (pt. 1)

• cfg80211_stop_link(9)
• cfg80211_stop_iface(9)
• cfg80211_shutdown_all_interfaces(9)
• wiphy_ext_feature_set(9)
• wiphy_ext_feature_isset(9)
• cfg80211_free_nan_func(9)
• struct cfg80211_nan_match_params(9)
• cfg80211_nan_match(9)
• cfg80211_nan_func_terminated(9)
• cfg80211_nan_sched_update_done(9)

🫶 auth, pmsr, assoc & bss

• cfg80211_external_auth_request(9)
• cfg80211_pmsr_report(9)
• cfg80211_pmsr_complete(9)
• cfg80211_iftype_allowed(9)
• cfg80211_assoc_comeback(9)
• cfg80211_update_owe_info_event(9)
• cfg80211_bss_flush(9)

🌈 colors, mlo, debugfs, s1g & friends

• cfg80211_bss_color_notify(9)
• cfg80211_obss_color_collision_notify(9)
• cfg80211_color_change_started_notify(9)
• cfg80211_color_change_aborted_notify(9)
• cfg80211_color_change_notify(9)
• cfg80211_6ghz_power_type(9)
• cfg80211_links_removed(9)
• struct cfg80211_mlo_reconf_done_data(9)
• cfg80211_mlo_reconf_add_done(9)
• cfg80211_schedule_channels_check(9)
• cfg80211_epcs_changed(9)
• cfg80211_next_nan_dw_notif(9)
• cfg80211_nan_cluster_joined(9)
• cfg80211_nan_ulw_update(9)
• cfg80211_nan_channel_evac(9)
• wiphy_locked_debugfs_read(9)
• wiphy_locked_debugfs_write(9)
• cfg80211_s1g_get_start_freq_khz(9)
• cfg80211_s1g_get_end_freq_khz(9)
• cfg80211_s1g_get_primary_sibling(9)
• cfg80211_incumbent_signal_notify(9)

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real talk, bestie: that's genuinely every single one of them, all 64, nothing skipped, nothing paraphrased. Read them, love them, man them 💖

and that's a wrap on the whole page 🎀 this one lives over in ./include/net and it's dated October 2026 — so if you're reading it before then, hi from the future, slay 🌸 go touch some wlan0, drink water, and remember: no cap, always check your return codes ✨👑