STRUCT IEEE80211_RANN_IE(9)

🦋 struct ieee80211_rann_ie(9) — the Kernel API Manual moment 🦋

okay bestie, so this is a page straight out of the Kernel API Manual and it's literally about one (1) little struct that's kind of a whole vibe in the mesh networking world. no cap, let's get into it 💅

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✨ NAME ✨

struct ieee80211_rann_ie — the RANN (root announcement) element. that's it, that's the name, and honestly? iconic. 🎀

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🌸 SYNOPSIS 🌸

here's the glow-up, character for character, do not touch:

struct ieee80211_rann_ie {
    u8 rann_flags;
    u8 rann_hopcount;
    u8 rann_ttl;
    u8 rann_addr[ETH_ALEN];
    __le32 rann_seq;
    __le32 rann_interval;
    __le32 rann_metric;
 };

like look at that layout 😭 she's structured, she's typed, she's everything.

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💖 Members 💖

okay so every field gets its moment, no skipping, we stan all of them equally:

• rann_flags — Flags. yes bestie, the flags 🚩
• rann_hopcount — Hop Count. how many hops, fr fr 🐇
• rann_ttl — Element TTL. the element's time-to-live, live ur life but not forever ✨
• rann_addr — Root Mesh STA Address. the address of the root mesh STA 👑
• rann_seq — HWMP Sequence Number. the HWMP sequence number, keeping things in order 🔢
• rann_interval — Interval. the interval, periodt ⏱️
• rann_metric — Metric. the metric 📏

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🫶 Description 🫶

so what is she? this structure represents the payload of the "RANN element" as described in IEEE Std 802.11-2020 section 9.4.2.111. that's the whole description and we're not adding anything to it because I said so 💀 — if you need more lore, go read section 9.4.2.111 yourself, iykyk 📖✨

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🔥 SEE ALSO 🔥

the friend group 🫶 go check them out:

• Kernel file ./include/linux/ieee80211-mesh.h enum ieee80211_preq_flags(9), enum ieee80211_preq_target_flags(9), struct ieee80211_mesh_chansw_params_ie(9), struct ieee80211_meshconf_ie(9), enum mesh_config_capab_flags(9), enum ieee80211_mesh_sync_method(9), enum ieee80211_mesh_path_protocol(9), enum ieee80211_mesh_path_metric(9), enum ieee80211_root_mode_identifier(9)

like that's a whole ensemble cast, main character energy all around 🌈👑

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ngl bestie, this is a kernel API page — read the fields carefully and don't go inventing behaviour that isn't in the spec, that's not the move 🙈

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and that's the whole page, mwah 💋 sign-off time: this one lives in ./include/linux, it's dated October 2026, and it's filed under struct ieee80211_rann_ie(9). slay, go forth and announce your roots 🌸🧚‍♀️💜