STRUCT IEEE80211_EHT_CAP_ELEM_FIXED(9)

💖 struct ieee80211_eht_cap_elem_fixed 💖

okay so bestie, we're deep in the ieee80211 kernel headers today — this one's from the Kernel API Manual, page struct ieee...p_elem_fixed(9) if you're searching for it. it's a tiny struct with big main character energy and honestly? obsessed.

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✨ NAME ✨

struct ieee80211_eht_cap_elem_fixed — the EHT capabilities fixed data. yeah. that's the whole vibe. it's the fixed-size part, bestie, and it slays.

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🎀 SYNOPSIS 🎀

look at her. she's so small. she's so powerful.

struct ieee80211_eht_cap_elem_fixed {
    u8 mac_cap_info[2];
    u8 phy_cap_info[9];
};

two bytes and nine bytes and suddenly we're doing Extremely High Throughput. no cap.

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🌸 MEMBERS 🌸

• mac_cap_info — the MAC capabilities, a little u8[2] of pure potential ✨ go check out IEEE80211_EHT_MAC_CAP* for the actual lore, iykyk
• phy_cap_info — the PHY capabilities, u8[9] this time because the physical layer has a lot to say 💅 the details live in IEEE80211_EHT_PHY_CAP*

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🦋 DESCRIPTION 🦋

so what even is this? it's the "EHT Capabilities element" fixed fields — like, the chunky non-optional head of the element — exactly as described in P802.11be_D2.0 section 9.4.2.313. if you need to cite your sources for the group chat, that's the citation 🫶

heads up: the spec reference is to the draft P802.11be_D2.0, so keep that exact string — don't go "fixing" it to some final version, bestie. fr fr. 🙈

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🔥 SEE ALSO 🔥

this struct does NOT show up alone, she rolls with an entire entourage. like, an iconic friend group:

• Kernel file ./include/linux/ieee80211-eht.h
• struct ieee80211_ttlm_elem(9)
• struct ieee80211_eht_mcs_nss_supp_20mhz_only(9)
• struct ieee80211_eht_mcs_nss_supp_bw(9)
• struct ieee80211_eht_cap_elem(9)
• struct ieee80211_eht_operation(9)
• struct ieee80211_eht_operation_info(9)
• ieee80211_mle_common_size(9)
• ieee80211_mle_get_link_id(9)
• ieee80211_mle_get_bss_param_ch_cnt(9)
• ieee80211_mle_get_eml_med_sync_delay(9)
• ieee80211_mle_get_eml_cap(9)
• ieee80211_mle_get_mld_capa_op(9)
• ieee80211_mle_get_ext_mld_capa_op(9)
• ieee80211_mle_get_enh_crit_upd_info(9)
• ieee80211_mle_get_mld_id(9)
• ieee80211_mle_size_ok(9)
• ieee80211_mle_type_ok(9)
• ieee80211_mle_basic_sta_prof_size_ok(9)
• ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(9)
• ieee80211_mle_basic_sta_prof_enh_crit_upd(9)
• ieee80211_mle_reconf_sta_prof_size_ok(9)
• ieee80211_emlsr_pad_delay_in_us(9)
• ieee80211_emlsr_trans_delay_in_us(9)
• ieee80211_emlmr_pad_delay_in_us(9)
• ieee80211_emlmr_trans_delay_in_us(9)
• ieee80211_eml_trans_timeout_in_us(9)

that's twenty-six entries and a header path, and yes, we listed every single one, because we do NOT skip the boring parts here 💜

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🌈 sign-off 🌈

this lil page lives in ./include/linux, stamped October 2026, and it's filed under the manual page struct ieee...p_elem_fixed(9). go read the headers, bestie, they ate and left no crumbs. periodt. 💅✨🎀