ppp_decompress_proto(9)

💅 ppp_decompress_proto(9) — like, the Kernel API Manual page, bestie

okay so welcome to the glo-up of ppp_decompress_proto, straight out of the Kernel API Manual, and honestly? she's a little function with a big job and we're gonna stan 💖

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✨ NAME ✨

ppp_decompress_proto — the girl who checks the skb data room and decompresses the protocol field. two jobs, one function, main character energy 👑

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🌸 SYNOPSIS 🌸

bool ppp_decompress_proto (struct sk_buff *skb );

that's it. that's the whole vibe. one arg, returns a bool, slays ✨

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🎀 ARGUMENTS 🎀

• skb — the socket buffer where the protocol field is supposed to get decompressed. heads up tho: the first byte of data must be a protocol field byte. no cap, that's a hard requirement, not a suggestion 🙈

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🦋 DESCRIPTION 🦋

so here's the tea ☕ — this function decompresses the protocol field in the PPP header if it's compressed, like when Protocol-Field-Compression (PFC) was negotiated. iykyk.

and because she's an overachiever, she also makes sure the skb data room is sufficient for the Protocol field — before and after decompression. both. she checks both. periodt 💅

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⭐ RETURN ⭐

• true — decompressed successfully, we ate and left no crumbs 🔥
• false — not enough room in skb 😭 (no room bestie, it's giving cramped)

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/net/ppp/ppp_generic.c
• __ppp_decompress_proto(9) — her lowkey sibling, also iconic 🫶

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ngl if you skipped reading this and just called the function anyway, at least remember the first byte thing. that's the one. 💀

okay bye bestie, this page lives in ./drivers/net/ppp, it's dated October 2026, and it's literally ppp_decompress_proto(9) — mwah, see u in the kernel 🧚‍♀️💜