PROBE::IPMIB.INUNK(3stap)

💖 PROBE::IPMIB.INUNK 💖

okay bestie so this is a page from the SNMP Information Tapset — it's probe::ipmib.InUnknownProtos, and no, that name is not a typo, it's giving very specific and very intentional. 🦋

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✨ NAME ✨

probe::ipmib.InUnknownProtos — count arriving packets with an unbound proto 💅

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✨ SYNOPSIS ✨

probe ipmib.InUnknownProtos {}

that's it. that's the whole probe. no args, no nothing, just vibes and counting. 🎀

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✨ VALUES ✨

these are the lil variables you get to play with inside the probe, and they're both lowkey iconic:

• op — the value that gets added to the counter (and it defaults to 1, so if you don't touch it, it just counts up by one like a good little counter 🫶)
• skb — a pointer to the struct sk_buff that's being acted on (the packet itself, the main character of this whole situation 👑)

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✨ DESCRIPTION ✨

so here's the tea, fr fr: the packet that skb points at gets filtered by the function ipmib_filter_key. if the packet passes that filter, it is counted in the global InUnknownProtos — which is equivalent to SNMP's MIB IPSTATS_MIB_INUNKNOWNPROTOS. 🧚

like, that's the entire plot. packet shows up, filter checks it, it passes, counter goes up. slay. ⭐

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✨ SEE ALSO ✨

• tapset::ipmib(3stap) — go read this one too, i'm literally obsessed 😭

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ngl if you got this far you're basically a Unix girlie now. periodt. 💜

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SystemTap Tapset Reference, Version September 2026 — mwah, that's a wrap, thanks for coming to my ted talk bestie, go count some unknown protos 🌈💖✨