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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>
45 lines
1.7 KiB
Go
45 lines
1.7 KiB
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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//go:build !ios
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// +build !ios
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package magicsock
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import (
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"tailscale.com/envknob"
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)
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// Various debugging and experimental tweakables, set by environment
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// variable.
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var (
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// debugDisco prints verbose logs of active discovery events as
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// they happen.
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debugDisco = envknob.Bool("TS_DEBUG_DISCO")
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// debugOmitLocalAddresses removes all local interface addresses
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// from magicsock's discovered local endpoints. Used in some tests.
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debugOmitLocalAddresses = envknob.Bool("TS_DEBUG_OMIT_LOCAL_ADDRS")
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// debugUseDerpRoute temporarily (2020-03-22) controls whether DERP
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// reverse routing is enabled (Issue 150).
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debugUseDerpRoute = envknob.OptBool("TS_DEBUG_ENABLE_DERP_ROUTE")
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// logDerpVerbose logs all received DERP packets, including their
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// full payload.
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logDerpVerbose = envknob.Bool("TS_DEBUG_DERP")
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// debugReSTUNStopOnIdle unconditionally enables the "shut down
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// STUN if magicsock is idle" behavior that normally only triggers
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// on mobile devices, lowers the shutdown interval, and logs more
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// verbosely about idle measurements.
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debugReSTUNStopOnIdle = envknob.Bool("TS_DEBUG_RESTUN_STOP_ON_IDLE")
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// debugAlwaysDERP disables the use of UDP, forcing all peer communication over DERP.
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debugAlwaysDERP = envknob.Bool("TS_DEBUG_ALWAYS_USE_DERP")
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)
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// inTest reports whether the running program is a test that set the
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// IN_TS_TEST environment variable.
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//
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// Unlike the other debug tweakables above, this one needs to be
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// checked every time at runtime, because tests set this after program
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// startup.
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func inTest() bool { return envknob.Bool("IN_TS_TEST") }
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