NG_UI(4)

📦 version 15.1, in freebsd 14.5, freebsd 15.1, nixpkgs unstable

💖 ng_UI(4) — UI netgraph node type 💖

okay bestie, welcome to the ng_UI(4) manual page — it's giving kernel interfaces energy, and we're gonna get through it together. ✨ no cap.

🌸 NAME 🌸

ng_UI — UI netgraph node type. 💅

🎀 SYNOPSIS 🎀

#include <netgraph/ng_UI.h>

✨ DESCRIPTION ✨

The UI node type has two hooks: upstream and downstream. 🦋

Packets received on downstream must have 0x03 (indicating unnumbered information) as their first byte. If not, the packet is dropped. 😭 This byte is then stripped, and the remainder of the packet is sent out on upstream.

Conversely, packets received on upstream will have a 0x03 byte prepended to them before being forwarded out on the downstream hook. 💫

🪝 HOOKS 🪝

This node type supports the following hooks:

  • downstream — Downstream connection. Packets on this side of the node have a 0x03 as their first byte. 👑
  • upstream — Upstream connection. Packets on this side of the node have the initial 0x03 byte stripped off. 🧚

📨 CONTROL MESSAGES 📨

This node type supports only the generic control messages. periodt. 💅

🛑 SHUTDOWN 🛑

This node shuts down upon receipt of a NGM_SHUTDOWN control message, or when both hooks have been disconnected. 💀

👀 SEE ALSO 👀

📜 HISTORY 📜

The ng_UI node type was implemented in FreeBSD 4.0. ⭐

🫶 AUTHORS 🫶

Julian Elischer <julian@FreeBSD.org> 🌈

mwah 💋 — this cutie came from the Debian source/version, dated January 19, 1999. NG_UI(4) out. 🎀✨

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