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wgengine/magicsock: move debug knobs to their own file, compile out on iOS

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No need for these knobs on iOS where you can set the environment
variables anyway.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2021-08-15 13:20:44 -07:00
parent 98d557dd24
commit 39610aeb09
3 changed files with 73 additions and 40 deletions
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40
wgengine/magicsock/magicsock.go
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@@ -59,35 +59,6 @@ import (
"tailscale.com/wgengine/wgcfg"
)
// Various debugging and experimental tweakables, set by environment
// variable.
var (
// logPacketDests prints the known addresses for a peer every time
// they change, in the legacy (non-discovery) endpoint code only.
logPacketDests, _ = strconv.ParseBool(os.Getenv("TS_DEBUG_LOG_PACKET_DESTS"))
// debugDisco prints verbose logs of active discovery events as
// they happen.
debugDisco, _ = strconv.ParseBool(os.Getenv("TS_DEBUG_DISCO"))
// debugOmitLocalAddresses removes all local interface addresses
// from magicsock's discovered local endpoints. Used in some tests.
debugOmitLocalAddresses, _ = strconv.ParseBool(os.Getenv("TS_DEBUG_OMIT_LOCAL_ADDRS"))
// debugUseDerpRoute temporarily (2020-03-22) controls whether DERP
// reverse routing is enabled (Issue 150). It will become always true
// later.
debugUseDerpRouteEnv = os.Getenv("TS_DEBUG_ENABLE_DERP_ROUTE")
debugUseDerpRoute, _ = strconv.ParseBool(debugUseDerpRouteEnv)
// logDerpVerbose logs all received DERP packets, including their
// full payload.
logDerpVerbose, _ = strconv.ParseBool(os.Getenv("TS_DEBUG_DERP"))
// debugReSTUNStopOnIdle unconditionally enables the "shut down
// STUN if magicsock is idle" behavior that normally only triggers
// on mobile devices, lowers the shutdown interval, and logs more
// verbosely about idle measurements.
debugReSTUNStopOnIdle, _ = strconv.ParseBool(os.Getenv("TS_DEBUG_RESTUN_STOP_ON_IDLE"))
// debugAlwaysDERP disables the use of UDP, forcing all peer communication over DERP.
debugAlwaysDERP, _ = strconv.ParseBool(os.Getenv("TS_DEBUG_ALWAYS_USE_DERP"))
)
// useDerpRoute reports whether magicsock should enable the DERP
// return path optimization (Issue 150).
func useDerpRoute() bool {
@@ -101,17 +72,6 @@ func useDerpRoute() bool {
return false
}
// inTest reports whether the running program is a test that set the
// IN_TS_TEST environment variable.
//
// Unlike the other debug tweakables above, this one needs to be
// checked every time at runtime, because tests set this after program
// startup.
func inTest() bool {
inTest, _ := strconv.ParseBool(os.Getenv("IN_TS_TEST"))
return inTest
}
// A Conn routes UDP packets and actively manages a list of its endpoints.
// It implements wireguard/conn.Bind.
type Conn struct {