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https://github.com/tailscale/tailscale.git
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42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
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// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package controlknobs contains client options configurable from control which can be turned on
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// or off. The ability to turn options on and off is for incrementally adding features in.
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package controlknobs
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import (
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"os"
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"strconv"
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"sync/atomic"
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"tailscale.com/types/opt"
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)
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// disableUPnP indicates whether to attempt UPnP mapping.
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var disableUPnP atomic.Value
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func init() {
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v, _ := strconv.ParseBool(os.Getenv("TS_DISABLE_UPNP"))
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var toStore opt.Bool
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toStore.Set(v)
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disableUPnP.Store(toStore)
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}
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// DisableUPnP reports the last reported value from control
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// whether UPnP portmapping should be disabled.
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func DisableUPnP() opt.Bool {
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v, _ := disableUPnP.Load().(opt.Bool)
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return v
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}
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// SetDisableUPnP will set whether UPnP connections are permitted or not,
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// intended to be set from control.
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func SetDisableUPnP(v opt.Bool) {
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old, ok := disableUPnP.Load().(opt.Bool)
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if !ok || old != v {
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disableUPnP.Store(v)
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}
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}
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