On Windows, configureInterface starts a goroutine reconfiguring the
Windows firewall.
But if configureInterface fails later, that goroutine kept running and
likely failing forever, spamming logs. Make it stop quietly if its
launching goroutine filed.
Rewrite log lines on the fly, based on the set of known peers.
This enables us to use upstream wireguard-go logging,
but maintain the Tailscale-style peer public key identifiers
that the rest of our systems (and people) expect.
Fixes#1183
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Continuation of earlier two umask changes,
5611f290eb and
d6e9fb1df0.
This change mostly affects us, running tailscaled as root by hand (wit
a umask of 0077), not under systemd. End users running tailscaled
under systemd won't have a umask.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Also, don't try to use IPv6 LinkLocalUnicast addresses for now. Like endpoints
exchanged with control, we share them but don't yet use them.
Updates #1172
c8c493f3d9 made it always say
`created=false` which scared me when I saw it, as that would've implied
things were broken much worse. Fortunately the logging was just wrong.
DstToString is used in two places in wireguard-go: Logging and uapi.
We are switching to use uapi for wireguard-go config.
To preserve existing behavior, we need the full set of addrs.
And for logging, having the full set of addrs seems useful.
(The Addrs method itself is slated for removal. When that happens,
the implementation will move to DstToString.)
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
To save CPU and wakeups, don't run the DERP cleanup timer regularly
unless there is a non-home DERP connection open.
Also eliminates the goroutine, moving to a time.AfterFunc.
Updates #1034
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This reverts commit 08baa17d9a.
It caused deadlocks due to lock ordering violations.
It was not the right fix, and thus should simply be reverted
while we look for the right fix (if we haven't already found it
in the interim; we've fixed other logging-after-test issues).
Fixes#1161
context.cancelCtx.Done involves a mutex and isn't as cheap as I
previously assumed. Convert the donec method into a struct field and
store the channel value once. Our one magicsock.Conn gets one pointer
larger, but it cuts ~1% of the CPU time of the ReceiveFrom benchmark
and removes a bubble from the --svg output :)
+ add a test for parseAndRemoveLogLevel()
+ add a test for drainPendingMessages()
+ test JSON log encoding including several special cases
Other tests frequently send logs but a) don't check the result and
b) do so by happenstance, such that the code in encode() was not
consistently being exercised and leading to spurious changes in
code coverage. These tests attempt to more systematically test
the logging function.
This is the second attempt to add these tests, the first attempt
(in https://github.com/tailscale/tailscale/pull/1114) had two issues:
1. httptest.NewServer creates multiple goroutine handlers, and
logtail uses goroutines to upload, but the first version had no
locking in the server to guard this.
Moved data handling into channels to get synchronization.
2. The channel to notify the test of the arrival of data had a depth
of 1, in cases where the Logger sent multiple uploads it would
block the server.
This resulted in the first iteration of these tests being flaky,
and we reverted it.
This new version of the tests has passed with
go test -race -count=10000
and seems solid.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
This test serves two purposes:
+ check that Write() returns an error if the tstun has been
closed.
+ ensure that the close-related code in tstun is exercised in
a test case. We were getting spurious code coverage adds/drops
based on timing of when the test case finished.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
Windows has a low resolution timer.
Some of the tests assumed that unblock takes effect immediately.
Consider:
t := time.Now()
elapsed := time.Now().After(t)
It seems plausible that elapsed should always be true.
However, with a low resolution timer, that might fail.
Change time.Now().After to !time.Now().Before,
so that unblocking always takes effect immediately.
Fixes#873.
