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41fd4eab5c
A new package can also later record/report which knobs are checked and set. It also makes the code cleaner & easier to grep for env knobs. Change-Id: Id8a123ab7539f1fadbd27e0cbeac79c2e4f09751 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
32 lines
892 B
Go
32 lines
892 B
Go
// 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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"tailscale.com/envknob"
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"tailscale.com/syncs"
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)
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// disableUPnP indicates whether to attempt UPnP mapping.
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var disableUPnP syncs.AtomicBool
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func init() {
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SetDisableUPnP(envknob.Bool("TS_DISABLE_UPNP"))
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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() bool {
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return disableUPnP.Get()
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}
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// SetDisableUPnP sets whether control says that UPnP should be
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// disabled.
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func SetDisableUPnP(v bool) {
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disableUPnP.Set(v)
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}
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