STRUCT IEEE80211_MCS_INFO(9)

💖 struct ieee80211_mcs_info(9) — like, the Kernel API Manual, bestie 💖

okay so. you opened struct ieee80211_mcs_info(9) and you're like "what even is this" — don't worry, I got you. we're literally about to become besties with a struct. and yes it's from the Kernel API Manual, we're fancy now. 🎀

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✨ NAME ✨

struct ieee80211_mcs_info — the Supported MCS Set field. that's it. that's the whole vibe. 💅

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🌸 SYNOPSIS 🌸

here's the whole thing, no gatekeeping:

struct ieee80211_mcs_info {
    u8 rx_mask[IEEE80211_HT_MCS_MASK_LEN];
    __le16 rx_highest;
    u8 tx_params;
    u8 reserved[3];
 };

four members. iconic lineup honestly. 🫶

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👑 MEMBERS 👑

• rx_mask — the RX mask. yep. that's the description, that's the whole thing, she's mysterious and she's slaying. 💅
• rx_highest — the highest supported RX rate, bestie. if it's set, it represents the highest supported RX data rate, measured in units of 1 Mbps. but — huge but — if this field is 0, do NOT use this value to consider the highest RX data rate supported. like, just don't. it's giving "empty field energy" 😭 write that down fr fr.
• tx_params — the TX parameters. go off king. 🔥
• reserved — reserved bits. they're just sitting there. leave them alone. 🙈

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🦋 DESCRIPTION 🦋

so this struct represents the "Supported MCS Set field", exactly as described in IEEE Std 802.11-2020 section 9.4.2.55.4. no cap, that's the citation, that's the lore. if you need the source of truth it's right there in the spec, section 9.4.2.55.4. ⭐

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🌈 SEE ALSO 🌈

go look at these, iykyk:

• Kernel file ./include/linux/ieee80211-ht.h
• struct ieee80211_bar(9)
• struct ieee80211_ht_cap(9)
• struct ieee80211_ht_operation(9)

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ngl the whole thing lives in ./include/linux and the page is dated October 2026, so like… future queen behavior? anyway, mwah, go read the header file, struct ieee80211_mcs_info(9) out 💜✨🧚