STRUCT BRCMF_SKBUFF_CB(9)

💖 struct brcmf_skbuff_cb(9) 💖

okay bestie, welcome to the Kernel API Manual entry for struct brcmf_skbuff_cb — yes that's a whole mouthful, iykyk, but it's literally the control buffer that rides along with an skbuff ✨

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🌸 NAME 🌸

struct brcmf_skbuff_cb — the control buffer associated with skbuff. that's it, that's the vibe 🎀

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🦋 SYNOPSIS 🦋

struct brcmf_skbuff_cb {
    u16 bus_flags;
    u16 if_flags;
    u32 htod;
    u16 htod_seq;
    enum brcmf_fws_skb_state state;
    struct brcmf_fws_mac_descriptor *mac;
 };

look at her. icon behavior. no cap 💅

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✨ Members ✨

• bus_flags — 2 bytes reserved for bus specific parameters 🚌 like, literally just holding space for the bus, okurrr.
• if_flags — holds the interface index and the packet related flags. two-for-one, we love a multitasker 💖
• htod — the host to device packet identifier (used in the PKTTAG tlv). host ➡️ device, periodt 🔥
• htod_seq — this 16-bit one is the original seq number for every suppress packet 🎀
• state — the transmit state of the packet. how's she doing? this tells you 🌈
• mac — descriptor related to the destination for this packet. where's it going? this knows 🦋

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👑 Description 👑

so here's the tea, bestie: this information is stored in the control buffer struct sk_buff::cb, and that? that provides 48 bytes of storage. so this structure should not exceed that. 48 bytes. that's the limit. don't be out here exceeding it fr fr 😭

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💜 SEE ALSO 💜

• Kernel file ./drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
• Firmware Signalling(9)
• enum brcmf_fws_skb_state(9)
• enum brcmf_fws_txstatus(9)
• struct brcmf_fws_mac_descriptor(9)
• enum brcmf_fws_hanger_item_state(9)
• struct brcmf_fws_hanger_item(9)
• struct brcmf_fws_hanger(9)
• brcmf_fws_get_tlv_len(9)

go read those too, they're all part of the friend group 🫶

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ngl this page came from ./drivers/net/wireless/broadco... and it's dated October 2026 — and that's the whole struct brcmf_skbuff_cb(9) situation. slay, stay hydrated, and don't overflow your control buffer 💀🧚‍♀️🍓