ieee80211_get_qos_ctl(9)

💖 ieee80211_get_qos_ctl — get pointer to qos control bytes ✨

okay so bestie, welcome to the Kernel API Manual 🎀 — yes that's the manual name, and yes it's giving "official but make it cute". This one's a lil function in ./include/linux/ieee80211.h land and it's honestly iconic once you know what it does 🦋

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🌸 NAME 🌸

ieee80211_get_qos_ctl — get pointer to qos control bytes 💅

Like, literally it hands you a pointer to the QoS control bytes. That's the whole job. Main character energy fr.

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✨ SYNOPSIS ✨

u8 * ieee80211_get_qos_ctl (struct ieee80211_hdr *hdr );

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🎀 ARGUMENTS 🎀

• hdr — the frame 👑 like, the actual 802.11 frame you're poking at, bestie.

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🌈 RETURN 🌈

a pointer to the QoS control field in the frame header 💖 (yes, u8 *, no cap)

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🦋 DESCRIPTION 🦋

so here's the vibe check 🧚 the qos ctrl bytes come after the frame_control, duration, seq_num and 3 or 4 addresses of length ETH_ALEN. Like, they're not at the front, they're chilling behind all that.

The way it knows which layout to use? It checks frame_control to choose between struct ieee80211_qos_hdr_4addr and struct ieee80211_qos_hdr 🫶 so like 4 addresses = 4addr struct, otherwise the normal one. Choices choices 💅

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⭐ SEE ALSO ⭐

Kernel file ./include/linux/ieee80211.h — that's the one, that's the home base 🏠

And now the extended universe, because there are so many of these bestie, buckle up:

• 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_deauth(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_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)

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okay that's the page!! 💜 this lil guy came from ./include/linux and it's dated October 2026 — write that down bestie, iykyk 🍓 byeee, go get those qos control bytes, slay 💅✨🔥