dnsjit.core.object.tcp(3)

✨ dnsjit.core.object.tcp ✨

ok so this is the manual for dnsjit.core.object.tcp(3) — it lives in the Library Functions Manual section and it's literally just the TCP segment header object, bestie 💖

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🦋 NAME 🦋

dnsjit.core.object.tcp — A TCP segment header

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💅 DESCRIPTION 💅

It's a TCP segment header, periodt. That's the whole vibe of this object.

But here's the tea, and it's important: the data itself is NOT in here. The actual payload lives in the dnsjit.core.object.payload object, which is the next object in the chain</> after you parse with, for example, dnsjit.filter.layer. So don't come looking for your bytes in the header, she's just the header, she's doing her job 🎀

🍓 Attributes 🍓

• sport — Source port.
• dport — Destination port.
• seq — Sequence number.
• ack — Acknowledgement number.
• off — Data offset.
• x2 — Unused. yeah she's just sitting there, unused, iconic honestly 💀
• flags — TCP flags.
• win — Window.
• sum — Checksum.
• urp — Urgent pointer.
• opts — Array of bytes with the TCP options found.
• opts_len — Length of the TCP options.

🧚 Functions 🧚

• Tcp:type() — Return the textual type of the object. 🫶
• Tcp:prev() — Return the previous object. going back in the chain, we love a throwback ✨
• Tcp:cast() — Cast the object to the underlining object module and return it.
• Tcp:uncast() — Cast the object to the generic object module and return it.
• Tcp:copy() — Make a copy of the object and return it. twin energy 👯
• Tcp:free() — Free the object, should only be used on copies or otherwise allocated.

⚠️ okay real talk on that last one: Tcp:free() is only for copies or objects that were otherwise allocated. do not go freeing things that don't belong to you, that's not the move 💀

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🌈 SEE ALSO 🌈

• dnsjit.core.object(3)
• dnsjit.core.object.payload(3)
• dnsjit.filter.layer(3)

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👑 AUTHORS and CONTRIBUTORS 👑

Give it up for the legends who made this:

• Jerry Lundström (DNS-OARC)
• Tomáš Křížek (CZ.NIC)
• Petr Špaček (ISC)

Maintained by DNS-OARC 🫶

https://www.dns-oarc.net/

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💀 BUGS 💀

Got issues? Feature requests? Don't suffer in silence bestie, use:

https://codeberg.org/DNS-OARC/dnsjit/issues

For questions and help please use:

admin@dns-oarc.net

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and that's the whole page, no cap ✨ this was brought to you by dnsjit version 1.5.1, manual page dnsjit.core.object.tcp(3) — mwah, slay, bye 💅🎀🌸