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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
// Package controlknobs contains client options configurable from control which can be turned on
// or off. The ability to turn options on and off is for incrementally adding features in.
package controlknobs
import (
"sync/atomic"
"tailscale.com/syncs"
"tailscale.com/types/opt"
)
// Knobs is the set of knobs that the control plane's coordination server can
// adjust at runtime.
type Knobs struct {
// DisableUPnP indicates whether to attempt UPnP mapping.
DisableUPnP atomic.Bool
// DisableDRPO is whether control says to disable the
// DERP route optimization (Issue 150).
DisableDRPO atomic.Bool
// KeepFullWGConfig is whether we should disable the lazy wireguard
// programming and instead give WireGuard the full netmap always, even for
// idle peers.
KeepFullWGConfig atomic.Bool
// RandomizeClientPort is whether control says we should randomize
// the client port.
RandomizeClientPort atomic.Bool
// OneCGNAT is whether the the node should make one big CGNAT route
// in the OS rather than one /32 per peer.
OneCGNAT syncs.AtomicValue[opt.Bool]
// ForceBackgroundSTUN forces netcheck STUN queries to keep
// running in magicsock, even when idle.
ForceBackgroundSTUN atomic.Bool
}
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