STRUCT IEEE80211_RADIOTAP_ITERATOR(9)

📦 version 7.3.1, in nixpkgs unstable

💅 struct ieee80211_radiotap_iterator(9) — Kernel API Manual 💅

okay so welcome to part 1 of 3, bestie 🫶 we're doing the Kernel API Manual thing and getting into the struct ieee80211_radiotap_iterator tea. Let's go. ✨

✨ NAME ✨

struct ieee80211_radiotap_iterator — tracks your walk thru the radiotap args that are present. Like, it keeps track of the radiotap args as you go through them. 💅

🌸 SYNOPSIS 🌸

       struct ieee80211_radiotap_iterator {
           struct ieee80211_radiotap_header *_rtheader;
           const struct ieee80211_radiotap_vendor_namespaces *_vns;
           const struct ieee80211_radiotap_namespace *current_namespace;
           unsigned char *_arg, *_next_ns_data;
           __le32 *_next_bitmap;
           unsigned char *this_arg;
           int this_arg_index;
           int this_arg_size;
           int is_radiotap_ns;
           int _max_length;
           int _arg_index;
           uint32_t _bitmap_shifter;
           int _reset_on_ext;
        };

🎀 Members 🎀

okay bestie, here's the whole cast — every member, no skips, no cap 🫶

  • _rtheader — pointer to the radiotap header we are walking through. that's the header we're touring, literally. 🗺️
  • _vns — vendor namespace definitions. the vendor namespace lore lives here. ✨
  • current_namespace — pointer to the current namespace definition (or internally NULL if the current namespace is unknown). yes, internally NULL when the current namespace is unknown — that's the vibe. 💜
  • _arg — next argument pointer. the pointer to the next arg, periodt. 🎀
  • _next_ns_data — beginning of the next namespace's data. where the next namespace's data begins, bestie. 🌸
  • _next_bitmap — internal pointer to next present u32. internal-only, iykyk. 🦋
  • this_arg — pointer to current radiotap arg; it is valid after each call to ieee80211_radiotap_iterator_next but also after ieee80211_radiotap_iterator_init where it will point to the beginning of the actual data portion. this one's main character energy: valid after every ieee80211_radiotap_iterator_next call, and also after ieee80211_radiotap_iterator_init, where it points to the beginning of the actual data portion. 👑
  • this_arg_index — index of current arg, valid after each successful call to ieee80211_radiotap_iterator_next. successful call = valid index, no cap. ⭐
  • this_arg_size — length of the current arg, for convenience. just the length, for convenience — we love a helpful field. 🍓
  • is_radiotap_ns — indicates whether the current namespace is the default radiotap namespace or not. default radiotap namespace? or not? this field tells you. 🌈
  • _max_length — length of radiotap header in cpu byte ordering. in cpu byte ordering, keep that exact. 💫
  • _arg_index — next argument index. the next argument index, bestie. 🧚
  • _bitmap_shifter — internal shifter for curr u32 bitmap, b0 set == arg present. internal shifter for curr u32 bitmap — b0 set == arg present, exactly. 🔥
  • _reset_on_ext — internal; reset the arg index to 0 when going to the next bitmap word. internal: reset the arg index to 0 when going to the next bitmap word. 🎀

🦋 Description 🦋

This struct describes the radiotap parser state. like, this is literally the state of the radiotap parser. ✨

🚨 bestie, listen: fields prefixed with an underscore must not be used by users of the parser, only by the parser internally. do not touch the underscore fields if you're a user of the parser — they are for the parser internally, periodt. 💀

That's the parser state, and those underscore fields are internal-only. 💅

🌈 SEE ALSO 🌈

okay so this is the guest list and bestie it is LONG. no cap, this page cross-references basically the entire cfg80211/mac80211 family — every struct, every enum, every helper, every subsystem page. if you came here looking for one friend, you found the whole group chat instead 💀 ngl that's a flex. anyway, here's everyone, grouped so your eyes survive:

🫶 start here

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

📡 bands, channels, rates and all the caps

like, all of the caps. every single one. she collected them all 🫶

🛠️ Actions and configuration

the chandef helpers alone are giving main character energy, there's like nine of them and they all ate 💅

🔍 Scanning and BSS list handling

  • 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)

(wowlan stuff lives down here too, yes it does, don't ask me why, that's just where the docs put it 😌)

🧚 Neighbor Awareness Networking (NAN)

  • 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)

🛰️ pmksa, external auth and measurement

  • 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)

👑 wiphy & wireless_dev (the big ones)

the wiphy_work / wiphy_delayed_work / wiphy_hrtimer_work quartet-quartet is lowkey iconic — queue, cancel, flush, pending, times three flavours 🔥

✨ Utility functions

channel ↔ frequency conversion, both directions, both units. she's bilingual bestie 🦋

🌸 Data path helpers

the find_* family goes hard — plain, ext, vendor, elem vs ie, match vs not. pick your fighter 🥊

📜 Regulatory enforcement infrastructure

🗄️ Internal regulatory db functions

📣 bss plumbing & notification central

note the underscore situation: __cfg80211_get_bss(9) and cfg80211_get_bss(9) are two different pages, and cfg80211_sched_scan_stopped(9) vs cfg80211_sched_scan_stopped_locked(9) are also two different pages. do not conflate them, i'm begging 🙈

📴 RFkill integration

🛍️ Vendor commands

🧪 Test mode

💌 connect, roam, mgmt, cqm — the notification era

and that's the entire guest list for this section, bestie — every single one accounted for, nobody left on read 💖 keep scrolling tho, the page isn't done with you yet ✨

…and the guest list is literally not done yet, bestie 😭 the SEE ALSO section keeps going, so here's the rest of the crew — every single one of them, no skips, no cap 💅

the regulatory + channel girlies 🦋

the setup-and-teardown besties 🎀

the IE + wakeup + proto squad ✨

the link + interface era 🔥

the NAN cuties 🧚

auth, PMSR, and OWE — very main character 👑

the BSS flush + coloring-book era 🌈

MLO + channels-check crew 💜

more NAN, because there's always more NAN 🍓

debugfs + S1G + incumbent signal, the deep-lore faves 🫶

okay and that's the whole list, bestie — every single reference, accounted for, nobody left on read 💖 you officially know the entire extended universe now, and honestly? iconic behaviour. go read the actual functions, they're right there, iykyk ✨

quick vibe check before you go: this page comes out of ./include/net, the version/date stamp on it is October 2026, and the footer at the very bottom repeats the name struct ieee8...tap_iterator(9) — so if you're citing it, that's your receipt 🎀

byeee, go read your kernel headers, ily, slay 💅

📦 where this page comes from