Detect interfaces per platform; add macOS and single-interface support (closes #2)

Linux runs exactly as before when both bridge interfaces exist. When they do
not, the lone default-route interface is monitored, and a single interface now
draws a single UI pane instead of an empty second one.

macOS is newly supported: a running VPN tunnel (utun) is monitored as the
primary pane alongside the physical default-route interface, or the physical
interface alone when no VPN is up.

Detection lives in internal/netdetect: interface/route data types, pure
selection logic keyed on OS name, and route parsers, all unit-tested on Linux
for both platforms. Only the real route query and the per-platform TCP dial
binding (source address on Linux, IP_BOUND_IF on macOS) are build-tagged. Ping
argument construction is a pure, OS-keyed function. NewMonitor now takes a list
of interfaces.

Model: opus-4-8

This commit is contained in:

sneak

2026-09-21 06:53:39 +00:00

parent cf9dc39053

commit ef3c373a12

18 changed files with 933 additions and 85 deletions

									
										cmd/rtnetmon/main.go
									
		+1
		-4
	
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				//go:build linux

				// +build linux

				// netmon – dual-interface network dashboard (curses)

				// netmon – network dashboard (curses) for Linux and macOS

				// WTFPL – 2025-05-16  sneak@sneak.berlin

				package main