libtailscale: use b.netmon and sys.Bus consistently #717
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fixes tailscale/android#17747 There was a mismatch between the netmon into which we were injecting network change events, and the netmon that the eventBus registered with in the userspace engine. The switch from directly registering callbacks with netmon to using the eventBus caused a regression where the injected events would no longer trigger interface rebinds based on feedback from the Android network monitoring APIs. Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>
cmol
approved these changes
Nov 21, 2025
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Fixes tailscale/tailscale#17747
There was a mismatch between the netmon into which we were injecting network change events, and the netmon that the eventBus registered with in the userspace engine.
The switch from directly registering callbacks with netmon to using the eventBus caused a regression where the injected events would no longer trigger interface rebinds based on feedback from the Android network monitoring APIs.
With a phone with both cell and wifi, swap between the two and ensure we're registering the proper LinkChange: major events and the corresponding rebinds in the userspace engine.