ieee80211_is_deauth(9)

💅 ieee80211_is_deauth — the kernel API manual, bestie edition ✨

okay so real talk, this page lives in the kernel API manual and it's about one tiny little helper that tells you if a frame is a deauth frame. that's it. that's the whole gig. but she's iconic and she's carrying the entire 802.11 header, so let's give her the moment she deserves 🎀

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✨ NAME ✨

ieee80211_is_deauth — check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DEAUTH

fr fr that's the vibe check: is this thing a management frame and is it specifically a deauthentication frame? both, or it's a no from her 💅

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🦋 SYNOPSIS 🦋

bool ieee80211_is_deauth (__le16 fc );

look at her. one arg. returns a bool. no drama, no notes 🫶

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🌸 ARGUMENTS 🌸

• fc — the frame control bytes, in little-endian byteorder. yes bestie, little-endian, don't come at her with big-endian bytes, she will know 😭

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⭐ RETURN ⭐

whether or not the frame is a deauthentication frame. that's it — a yes or a no, a true or a false, a slay or a not-slay 👑

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💜 SEE ALSO 💜

so there's a whole friend group. the kernel file to look at is ./include/linux/ieee80211.h, and honestly the whole squad lives over there:

• 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)
• ieee80211_is_mgmt(9)
• ieee80211_is_ctl(9)
• ieee80211_is_data(9)
• ieee80211_is_ext(9)
• ieee80211_is_data_qos(9)
• ieee80211_is_data_present(9)
• 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_action(9)
• 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)
• 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 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)
• ieee80211_get_qos_ctl(9)
• ieee80211_get_tid(9)
• ieee80211_get_SA(9)
• ieee80211_get_DA(9)
• 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)
• 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)

like I said. whole friend group. all of them. go say hi 🧚

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ngl there are no options, no env vars, no exit statuses and no bug notes on this one — it's a one-line lil predicate and she knows exactly what she is 💖

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🌈 the cute sign-off 🌈

this masterpiece of a page comes to you from <pink>./include/linux</pink>, dated <purple>October 2026</purple> — and the man page herself answers to the name ieee80211_is_deauth(9). mwah 💋 go check a frame control byte for me, bestie, you're gonna do amazing 🍓