NG_SPLIT(4)

📦 version 12.2, in debian bookworm, debian trixie, ubuntu jammy, ubuntu noble, ubuntu questing, ubuntu resolute, ubuntu stonking

💖 NG_SPLIT(4) 💖

okay bestie, so this is a Kernel Interfaces Manual page — NG_SPLIT(4), the netgraph node that separates your incoming flow from your outgoing flow. it's short, it's sweet, it's giving tiny node, big job. let's get into it 🦋

✨ NAME ✨

ng_split — netgraph node to separate incoming and outgoing flows

🌸 SYNOPSIS 🌸

#include <netgraph/ng_split.h>

like, that's it. that's the whole include. no cap. 🎀

💅 DESCRIPTION 💅

so the split node type is the friend who takes a bidirectional stream of packets — packets going both ways, all mixed up together — and splits it into two separate unidirectional streams of packets. one direction each. clean. organized. main character energy. 👑

🫶 HOOKS 🫶

this node type supports the following three hooks, bestie, and they are:

  • in — packets received on in are forwarded to mixed. cute lil relay, slay ✨
  • out — packets received on out will be discarded as illegal. 🚫💀 not me showing up at the wrong door, that's an instant block, fr fr.
  • mixed — packets received on mixed are forwarded to out. iconic behavior, honestly 🌈

⭐ CONTROL MESSAGES ⭐

this node type supports only the generic control messages. that's it. no special extras, no secret menu, nothing. 💅

😭 SHUTDOWN 😭

this node shuts down when either:

  1. it receives a NGM_SHUTDOWN control message, or
  2. all hooks have been disconnected — like, everyone left the group chat, so the node dips too 🙈
lowkey that second one is the saddest way to go out but okay

👑 SEE ALSO 👑

🧚 HISTORY 🧚

the ng_split node type was implemented in FreeBSD 3.5 but incorporated into FreeBSD in FreeBSD 5.0. so it was out here existing before it was officially existing. we love a lowkey debut 🌸

💜 AUTHORS 💜

  • Julian Elischer <julian@FreeBSD.org>
  • Vitaly V. Belekhov <vitaly@riss-telecom.ru>

and that's the whole page, bestie — this version came from the Debian build, dated February 19, 2001, and it was a NG_SPLIT(4) situation from start to finish. periodt. 💖✨🎀

📦 where this page comes from