ieee80211_is_ctl(9)

🦋 NAME 🦋

okay so bestie, welcome to the Kernel API Manual (section 9, very official 💅) — this page is all about ieee80211_is_ctl, the little function that checks whether a frame type is IEEE80211_FTYPE_CTL.

That's it. That's the whole slay. One job, done iconically. ✨

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🌸 SYNOPSIS 🌸

bool ieee80211_is_ctl (__le16 fc );

no cap, that's the entire signature. she's short, she's sweet, she returns a bool 🫶

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🎀 ARGUMENTS 🎀

• fc — the frame control bytes, and they're in little-endian byteorder (put some respect on the byteorder, it matters 👑).

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⭐ RETURN ⭐

it tells you whether or not the frame type is control. yes/no, true/false, slay/not-slay. 💖

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🔥 SEE ALSO 🔥

first up, the literal source of truth: kernel file ./include/linux/ieee80211.h — go read her, she's iconic.

and now, the guest list (it's long, hydrate first 🍓):

• the has_* girlies: ieee80211_has_tods(9), ieee80211_has_fromds(9), ieee80211_has_a4(9), ieee80211_has_morefrags(9), ieee80211_has_retry(9), ieee80211_has_pm(9), ieee80211_has_moredata(9), ieee80211_has_protected(9), ieee80211_has_order(9)
• frame-type besties: ieee80211_is_mgmt(9), ieee80211_is_data(9), ieee80211_is_ext(9), ieee80211_is_data_qos(9), ieee80211_is_data_present(9)
• the association / probe / beacon main characters: ieee80211_is_assoc_req(9), ieee80211_is_assoc_resp(9), ieee80211_is_reassoc_req(9), ieee80211_is_reassoc_resp(9), ieee80211_is_assoc(9), ieee80211_is_probe_req(9), ieee80211_is_probe_resp(9), ieee80211_is_beacon(9), ieee80211_is_atim(9), ieee80211_is_disassoc(9), ieee80211_is_auth(9), ieee80211_is_deauth(9), ieee80211_is_action(9)
• the control-adjacent crowd (iykyk): ieee80211_is_back_req(9), ieee80211_is_back(9), ieee80211_is_pspoll(9), ieee80211_is_rts(9), ieee80211_is_cts(9), ieee80211_is_ack(9), ieee80211_is_cfend(9), ieee80211_is_cfendack(9)
• nullfunc nation + frag squad: ieee80211_is_nullfunc(9), ieee80211_is_qos_nullfunc(9), ieee80211_is_trigger(9), ieee80211_is_any_nullfunc(9), ieee80211_is_first_frag(9), ieee80211_is_frag(9)
• struct/enum era (part one, the information elements): struct ieee80211_quiet_ie(9), struct ieee80211_msrment_ie(9), struct ieee80211_channel_sw_ie(9), struct ieee80211_ext_chansw_ie(9), struct ieee80211_sec_chan_offs_ie(9), struct ieee80211_wide_bw_chansw_ie(9), struct ieee80211_tim_ie(9), struct ieee80211_tpc_report_ie(9), struct ieee80211_bss_load_elem(9), struct ieee80211_timeout_interval_ie(9), enum ieee80211_idle_options(9), struct ieee80211_bss_max_idle_period_ie(9), struct ieee80211_bssid_index(9), struct ieee80211_multiple_bssid_configuration(9)
• the getters, absolute legends: ieee80211_get_qos_ctl(9), ieee80211_get_tid(9), ieee80211_get_SA(9), ieee80211_get_DA(9)
• robust management + privacy vibes: ieee80211_is_bufferable_mmpdu(9), _ieee80211_is_robust_mgmt_frame(9), ieee80211_is_robust_mgmt_frame(9), ieee80211_is_public_action(9), ieee80211_is_protected_dual_of_public_action(9), _ieee80211_is_group_privacy_action(9), ieee80211_is_group_privacy_action(9)
• timing/finishing touches: ieee80211_tu_to_usec(9), ieee80211_get_tdls_action(9), ieee80211_action_contains_tpc(9), ieee80211_is_timing_measurement(9), ieee80211_is_ftm(9), for_each_element_completed(9), struct ieee80211_enh_crit_upd(9), ieee80211_check_tim(9)

literally every single one of those is a real page and a real friend of this one. don't skip the fine print bestie, it's giving syllabus week 📚

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and that's the whole page!! mwah 💋 this masterpiece was served to you from ./include/linux, stamped October 2026, and filed forever under ieee80211_is_ctl(9). go forth and check your frame types, queen 👑✨