Surveying the fleet prior to turning off old/unused/insecure
TLS versions.
Updates tailscale/corp#3615
Signed-off-by: David Anderson <danderson@tailscale.com>
Mudpuppies are salamanders, and as such have tails but no scales.
The management apologizes for the error.
Signed-off-by: David Anderson <danderson@tailscale.com>
Currently only search domains are stored. This was an oversight
(under?) on my part.
As things are now, when MagicDNS is on and "Override local DNS" is
off, the dns forwarder has to timeout before names resolve. This
introduces a pretty annoying lang that makes everything feel
extremely slow. You will also see an error: "upstream nameservers
not set".
I tested with "Override local DNS" on and off. In both situations
things seem to function as expected (and quickly).
Signed-off-by: Aaron Bieber <aaron@bolddaemon.com>
This fixes a deadlock on shutdown.
One goroutine is waiting to send on c.derpRecvCh before unlocking c.mu.
The other goroutine is waiting to lock c.mu before receiving from c.derpRecvCh.
#3736 has a more detailed explanation of the sequence of events.
Fixes#3736
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
-W is milliseconds on darwin, not seconds, and empirically it's
milliseconds after a 1 second base.
Change-Id: I2520619e6699d9c505d9645ce4dfee4973555227
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
With this change, the client can obtain the initial handshake message
separately from the rest of the handshake, for embedding into another
protocol. This enables things like RTT reduction by stuffing the
handshake initiation message into an HTTP header.
Similarly, the server API optionally accepts a pre-read Noise initiation
message, in addition to reading the message directly off a net.Conn.
Updates #3488
Signed-off-by: David Anderson <danderson@tailscale.com>
This test set the bar too high.
Just a couple of missed timers was enough to fail.
Change the test to more of a sanity check.
While we're here, run it for just 1s instead of 5s.
Prior to this change, on a 13" M1 MPB, with
stress -p 512 ./rate.test -test.run=QPS
I saw 90%+ failures.
After this change, I'm at 30k runs with no failures yet.
Fixes#3733
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Go 1.17 added a HandshakeContext func to take care of timeouts during
TLS handshaking, so switch from our homegrown goroutine implementation
to the standard way.
Signed-off-by: David Anderson <danderson@tailscale.com>
Cancelling the context makes the timeout goroutine race with the write that
reports a successful TLS handshake, so you can end up with a successful TLS
handshake that mysteriously reports that it timed out after ~0s in flight.
The context is always canceled and cleaned up as the function exits, which
happens mere microseconds later, so just let function exit clean up and
thereby avoid races.
Signed-off-by: David Anderson <danderson@tailscale.com>
This started as an attempt to placate GitHub's code scanner,
but it's also probably generally a good idea.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Turning this on at the beginning of the 1.21.x dev cycle, for 1.22.
Updates #150
Change-Id: I1de567cfe0be3df5227087de196ab88e60c9eb56
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The GitHub code scanner flagged this as a security vulnerability.
I don't believe it was, but I couldn't convince myself of it 100%.
Err on the safe side and use html/template to generate the HTML,
with all necessary escaping.
Fixestailscale/corp#2698
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
On Synology, the /etc/resolv.conf has tabs in it, which this
resolv.conf parser (we have two, sigh) didn't handle.
Updates #3710
Change-Id: I86f8e09ad1867ee32fa211e85c382a27191418ea
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The --reset shouldn't imply that a Backend.Start is necessary. With
this, it can do a Backend.EditPrefs instead, which then doesn't do all
the heavy work that Start does. Also, Start on Windows behaves
slightly differently than Linux etc in some cases because of tailscaled
running in client mode on Windows (where the GUI supplies the prefs).
Fixes#3702
Change-Id: I75c9f08d5e0052bf623074030a3a7fcaa677abf6
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Tailscale seems to be breaking WSL configurations lately. Until we
understand what changed, turn off Tailscale's involvement by default
and make it opt-in.
Updates #2815
Change-Id: I9977801f8debec7d489d97761f74000a4a33f71b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
OpenBSD 6.9 and up has a daemon which handles nameserver configuration. This PR
teaches the OpenBSD dns manager to check if resolvd is being used. If it is, it
will use the route(8) command to tell resolvd to add the Tailscale dns entries
to resolv.conf
Signed-off-by: Aaron Bieber <aaron@bolddaemon.com>
The rest of our workflows use v2.1.4.
For reasons I do not understand, we must set GOPATH here.
Maybe the GitHub Action builds come with GOPATH already set?
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Except for the super verbose packet-level dumps. Keep those disabled
by default with a const.
Updates #2642
Change-Id: Ia9eae1677e8b3fe6f457a59e44896a335d95d547
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
From Maisem's code review feedback where he mashed the merge
button by mistake.
Change-Id: I55abce036a6c25dc391250514983125dda10126c
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
