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71029cea2d
This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>
48 lines
1.9 KiB
Go
48 lines
1.9 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build !ios && !js
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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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const linkDebug = true
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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.RegisterBool("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.RegisterBool("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.RegisterOptBool("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.RegisterBool("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.RegisterBool("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.RegisterBool("TS_DEBUG_ALWAYS_USE_DERP")
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// debugEnableSilentDisco disables the use of heartbeatTimer on the endpoint struct
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// and attempts to handle disco silently. See issue #540 for details.
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debugEnableSilentDisco = envknob.RegisterBool("TS_DEBUG_ENABLE_SILENT_DISCO")
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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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