NG_ECHO(4)

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

🦋 ng_echo(4) — netgraph echo node type 🦋

okay so bestie, this is the ng_echo(4) page from the Kernel Interfaces Manual, and it's literally the netgraph echo node type. it reflects everything back at you — iconic behavior, no cap. It's used for testing and debugging. 💖

🌸 NAME 🌸

ng_echo — netgraph echo node type

✨ SYNOPSIS ✨

#include <netgraph/ng_echo.h>

🎀 DESCRIPTION 🎀

The echo node type reflects all data and control messages back to the sender. This node type is used for testing and debugging. Basically: it's a mirror in node form, and it's lowkey perfect for poking at things. 🪞

🪝 HOOKS 🪝

An echo node accepts any request to connect, regardless of the hook name, as long as the name is unique. so yes bestie, hook names are flexible — just keep them unique. 🫶

📨 CONTROL MESSAGES 📨

This node type supports only the generic control messages. Any other control messages are reflected back to the sender. periodt. 📬

🛑 SHUTDOWN 🛑

This node shuts down upon receipt of a NGM_SHUTDOWN control message, or when all hooks have been disconnected. so that's the shutdown vibe check. 💀

👀 SEE ALSO 👀

📜 HISTORY 📜

The ng_echo node type was implemented in FreeBSD 4.0. oldie but goodie. ✨

👑 AUTHORS 👑

Julian Elischer <julian@FreeBSD.org> 💜

mwah 💋 this page came from Debian, dated January 19, 1999, and its manual name is NG_ECHO(4). bye bestie, go echo something 🫶🌈

📦 where this page comes from