It was accidentally deleted in the earlier 0022c3d2e (#2143) refactor.
Lock it in with a test.
Fixestailscale/corp#2503
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
It was useful early in development when disco clients were the
exception and tailscale logs were noisier than today, but now
non-disco is the exception.
Updates #2752
Signed-off-by: David Anderson <danderson@tailscale.com>
Having removed magicconn.Start, there's no need to synchronize startup
of other things to it any more.
Signed-off-by: David Anderson <danderson@tailscale.com>
Over time, other magicsock refactors have made Start effectively a
no-op, except that some other functions choose to panic if called
before Start.
Signed-off-by: David Anderson <danderson@tailscale.com>
The tests build fine on other Unix's, they just can't run there.
But there is already a t.Skip by default, so `go test` ends up
working fine elsewhere and checks the code compiles.
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
At "Starting", the DERP connection isn't yet up. After the first netmap
and DERP connect, then it transitions into "Running".
Fixes#2708
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
So people can use the package for whois checks etc without version
skew errors.
The earlier change faa891c1f2 for #1905
was a bit too aggressive.
Fixes#2757
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This uses a neat little tool to dump the output of DNS queries to
standard out. This is the first end-to-end test of DNS that runs against
actual linux systems. The /etc/resolv.conf test may look superflous,
however this will help for correlating system state if one of the DNS
tests fails.
Signed-off-by: Christine Dodrill <xe@tailscale.com>
A public key should only have max one connection to a given
DERP node (or really: one connection to a node in a region).
But if people clone their machine keys (e.g. clone their VM, Raspbery
Pi SD card, etc), then we can get into a situation where a public key
is connected multiple times.
Originally, the DERP server handled this by just kicking out a prior
connections whenever a new one came. But this led to reconnect fights
where 2+ nodes were in hard loops trying to reconnect and kicking out
their peer.
Then a909d37a59 tried to add rate
limiting to how often that dup-kicking can happen, but empirically it
just doesn't work and ~leaks a bunch of goroutines and TCP
connections, tying them up for hour+ while more and more accumulate
and waste memory. Mostly because we were doing a time.Sleep forever
while not reading from their TCP connections.
Instead, just accept multiple connections per public key but track
which is the most recent. And if two both are writing back & forth,
then optionally disable them both. That last part is only enabled in
tests for now. The current default policy is just last-sender-wins
while we gather the next round of stats.
Updates #2751
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Fix a few test printing issues when tests fail.
Qemu console output is super useful when something is wrong in the
harness and we cannot even bring up the tests.
Also useful for figuring out where all the time goes in tests.
A little noisy, but not too noisy as long as you're only running one VM
as part of the tests, which is my plan.
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
Also remove extra distros for now.
We can bring them back later if useful.
Though our most important distros are these two Ubuntu, debian stable,
and Raspbian (not currently supported).
And before doing more Linux, we should do Windows.
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
We were returning an error almost, but not quite like errConnClosed in
a single codepath, which could still trip the panic on reconfig in the
test logic.
Signed-off-by: David Anderson <danderson@tailscale.com>
Our prod code doesn't eagerly handshake, because our disco layer enables
on-demand handshaking. Configuring both peers to eagerly handshake leads
to WireGuard handshake races that make TestTwoDevicePing flaky.
Signed-off-by: David Anderson <danderson@tailscale.com>
It only existed to override one test-only behavior with a
different test-only behavior, in both cases working around
an annoying feature of our CI environments. Instead, handle
that weirdness entirely in the test code, with a tweaked
TestOnlyPacketListener that gets injected.
Signed-off-by: David Anderson <danderson@tailscale.com>
The docstring said it was meant for use in tests, but it's specifically a
special codepath that is _only_ used in tests, so make the claim stronger.
Signed-off-by: David Anderson <danderson@tailscale.com>
Instead of using the legacy codepath, teach discoEndpoint to handle
peers that have a home DERP, but no disco key. We can still communicate
with them, but only over DERP.
Signed-off-by: David Anderson <danderson@tailscale.com>
Unfortunately this test fails on certain architectures.
The problem comes down to inconsistencies in the Go escape analysis
where specific variables are marked as escaping on certain architectures.
The variables escaping to the heap are unfortunately in crypto/sha256,
which makes it impossible to fixthis locally in deephash.
For now, fix the test by compensating for the allocations that
occur from calling sha256.digest.Sum.
See golang/go#48055
Fixes#2727
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
This test is highly dependent on the accuracy of OS timers.
Reduce the number of failures by decreasing the required
accuracy from 0.999 to 0.995.
Also, switch from repeated time.Sleep to using a time.Ticker
for improved accuracy.
Updates #2727
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
The VM test has two tailscaled instances running and interleaves the
logs. Without a prefix it is impossible to figure out what is going on.
It might be even better to include the [ABCD] node prefix here as well.
Unfortunately lots of interesting logs happen before tailscaled has a
node key, so it wouldn't be a replacement for a short ID.
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
Brad Fitzpatrick
David Anderson
Maisem Ali
David Crawshaw
Christine Dodrill
Emmanuel T Odeke
Joe Tsai