ieee80211_is_first_frag(9)

💅 ieee80211_is_first_frag — a kernel API manual page (section 9, bestie)

okay so this is ieee80211_is_first_frag(9), straight out of the Kernel API Manual, and it's genuinely the most "am I the first one here?" little helper in the whole ieee80211 friend group 💖

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✨ NAME ✨

ieee80211_is_first_frag — check if IEEE80211_SCTL_FRAG is not set

like, that's the whole vibe check: is the frag bit off? then congrats bestie, you're first 🎀

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🌸 SYNOPSIS 🌸

bool ieee80211_is_first_frag (__le16 seq_ctrl );

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🦋 ARGUMENTS 🦋

• seq_ctrl — the frame's sequence control bytes, in little-endian byteorder. yes, little-endian, don't come at me with big-endian energy 🙈

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👑 RETURN 👑

it tells you whether or not the frame is the first fragment — and lowkey the iconique part is that it's also true if the frame isn't fragmented at all. so an unfragmented frame gets to sit with the first-frag kids, no cap ✨

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🔥 SEE ALSO 🔥

the kernel file ./include/linux/ieee80211.h is the mothership, and honestly the whole extended family is here — this function has SO many siblings, it's giving huge family group chat energy:

• 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_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)

ngl that's a lot of friends and every single one of them slays in their own way 💅

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💀 reminder bestie: this is a kernel API manual page, section 9, so it lives in the development/kernel docs zone — not your everyday user command. read it, love it, cite it correctly.

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and that's the whole page, mwah 🫶 this cutie dropped from ./include/linux back in October 2026, and it's filed under ieee80211_is_first_frag(9) — periodt. 🌈⭐💜