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Andrea Gottardo a8ee83e2c5 health: begin work to use structured health warnings instead of strings, pipe changes into ipn.Notify (#12406) ... Updates tailscale/tailscale#4136 This PR is the first round of work to move from encoding health warnings as strings and use structured data instead. The current health package revolves around the idea of Subsystems. Each subsystem can have (or not have) a Go error associated with it. The overall health of the backend is given by the concatenation of all these errors. This PR polishes the concept of Warnable introduced by @bradfitz a few weeks ago. Each Warnable is a component of the backend (for instance, things like 'dns' or 'magicsock' are Warnables). Each Warnable has a unique identifying code. A Warnable is an entity we can warn the user about, by setting (or unsetting) a WarningState for it. Warnables have: - an identifying Code, so that the GUI can track them as their WarningStates come and go - a Title, which the GUIs can use to tell the user what component of the backend is broken - a Text, which is a function that is called with a set of Args to generate a more detailed error message to explain the unhappy state Additionally, this PR also begins to send Warnables and their WarningStates through LocalAPI to the clients, using ipn.Notify messages. An ipn.Notify is only issued when a warning is added or removed from the Tracker. In a next PR, we'll get rid of subsystems entirely, and we'll start using structured warnings for all errors affecting the backend functionality. Signed-off-by: Andrea Gottardo <andrea@gottardo.me>		5 months ago
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callback.go	wgengine/router: implement UpdateMagicsockPort for CallbackRouter (#10494)	11 months ago
consolidating_router.go	wgengine/router: consolidate routes before reconfiguring router for mobile clients	6 months ago
consolidating_router_test.go	wgengine/router: consolidate routes before reconfiguring router for mobile clients	6 months ago
ifconfig_windows.go	health: begin work to use structured health warnings instead of strings, pipe changes into ipn.Notify (#12406)	5 months ago
ifconfig_windows_test.go	all: use Go 1.22 range-over-int	7 months ago
router.go	various: implement stateful firewalling on Linux (#12025)	6 months ago
router_darwin.go	health, all: remove health.Global, finish plumbing health.Tracker	6 months ago
router_default.go	health, all: remove health.Global, finish plumbing health.Tracker	6 months ago
router_fake.go	util/linuxfw, wgengine: allow ingress to magicsock UDP port on Linux (#10370)	11 months ago
router_freebsd.go	health, all: remove health.Global, finish plumbing health.Tracker	6 months ago
router_linux.go	health: begin work to use structured health warnings instead of strings, pipe changes into ipn.Notify (#12406)	5 months ago
router_linux_test.go	wgengine/router: print Docker warning when stateful filtering is enabled	6 months ago
router_openbsd.go	health, all: remove health.Global, finish plumbing health.Tracker	6 months ago
router_test.go	various: implement stateful firewalling on Linux (#12025)	6 months ago
router_userspace_bsd.go	health, all: remove health.Global, finish plumbing health.Tracker	6 months ago
router_windows.go	cmd/tailscaled, net/dns, wgengine/router: start Windows child processes with DETACHED_PROCESS when I/O is being piped	5 months ago
router_windows_test.go	wgengine/router: look up absolute path to netsh.exe on Windows	10 months ago
runner.go	all: update copyright and license headers	2 years ago