The Lufthansa in-flight wifi generates a synthetic 204 response to the
DERP server's /generate_204 endpoint. This PR adds a basic
challenge/response to the endpoint; something sufficiently complicated
that it's unlikely to be implemented by a captive portal. We can then
check for the expected response to verify whether we're being MITM'd.
Follow-up to #5601
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I94a68c9a16a7be7290200eea6a549b64f02ff48f
We removed it in #4806 in favor of the built-in functionality from the
nhooyr.io/websocket package. However, it has an issue with deadlines
that has not been fixed yet (see nhooyr/websocket#350). Temporarily
go back to using a custom wrapper (using the fix from our fork) so that
derpers will stop closing connections too aggressively.
Updates #5921
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
Allows UI to display slightly more fine-grained progress when the SSH
connection is being established.
Updates tailscale/corp#7186
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
This package parses a JSON stream of netlog.Message from os.Stdin
and pretty prints the contents as a stream of tables.
It supports reverse lookup of tailscale IP addresses if given
an API key and the tailnet that these traffic logs belong to.
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
This way we can do that once (out of band, in the GitHub action),
instead of increasing the time of each deploy that uses the package.
.wasm is removed from the list of automatically pre-compressed
extensions, an OSS bump and small change on the corp side is needed to
make use of this change.
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
If the wgcfg.Config is specified with network logging arguments,
then Userspace.Reconfig starts up an asynchronous network logger,
which is shutdown either upon Userspace.Close or when Userspace.Reconfig
is called again without network logging or route arguments.
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
If the username includes a suffix of +password, then we accept
password auth and just let them in like it were no auth.
This exists purely for SSH clients that get confused by seeing success
to their initial auth type "none".
Co-authored-by: Maisem Ali <maisem@tailscale.com>
Change-Id: I616d4c64d042449fb164f615012f3bae246e91ec
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
When Tailscale is installed via Homebrew, `/usr/local/bin/tailscaled`
is a symlink to the actual binary.
Now when `tailscaled install-system-daemon` runs, it will not attempt
to overwrite that symlink if it already points to the tailscaled binary.
However, if executed binary and the link target differ, the path will
he overwritten - this can happen when a user decides to replace
Homebrew-installed tailscaled with a one compiled from source code.
Fixes#5353
Signed-off-by: Anton Tolchanov <anton@tailscale.com>
188.166.70.128 port 2222 for now. Some hostname later maybe.
Change-Id: I9c329410035221ed6cdff7a482727d30b77eea8b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Send two banners with a second in between, this demonstrates the case
where all banners are shown after auth completes and not during.
Signed-off-by: Maisem Ali <maisem@tailscale.com>
For SSH client authors to fix their clients without setting up
Tailscale stuff.
Change-Id: I8c7049398512de6cb91c13716d4dcebed4d47b9c
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The window may not end up getting unloaded (if other beforeunload
handlers prevent the event), thus we should only close the SSH session
if it's truly getting unloaded.
Updates tailscale/corp#7304
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
If Wrapper.StatisticsEnable is enabled,
then per-connection counters are maintained.
If enabled, Wrapper.StatisticsExtract must be periodically called
otherwise there is unbounded memory growth.
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
xterm 5.0 was released a few weeks ago, and it picks up
xtermjs/xterm.js#4069, which was the main reason why we were on a 5.0
beta.
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
From the original commit that implemented it:
It accepts Postgres connections over Tailscale only, dials
out to the configured upstream database with TLS (using
strong settings, not the swiss cheese that postgres defaults to),
and proxies the client through.
It also keeps an audit log of the sessions it passed through,
along with the Tailscale-provided machine and user identity
of the connecting client.
In our other repo, this was:
commit 92e5edf98e8c2be362f564a408939a5fc3f8c539,
Change-Id I742959faaa9c7c302bc312c7dc0d3327e677dc28.
Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Signed-off-by: David Anderson <danderson@tailscale.com>
And add a CLI/localapi and c2n mechanism to enable it for a fixed
amount of time.
Updates #1548
Change-Id: I71674aaf959a9c6761ff33bbf4a417ffd42195a7
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Most visible when using tsnet.Server, but could have resulted in dropped
messages in a few other places too.
Fixes#5743
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
I added new functions to winutil to obtain the state of a service and all
its depedencies, serialize them to JSON, and write them to a Logf.
When tstun.New returns a wrapped ERROR_DEVICE_NOT_AVAILABLE, we know that wintun
installation failed. We then log the service graph rooted at "NetSetupSvc".
We are interested in that specific service because network devices will not
install if that service is not running.
Updates https://github.com/tailscale/tailscale/issues/5531
Signed-off-by: Aaron Klotz <aaron@tailscale.com>
* and move goroutine scrubbing code to its own package for reuse
* bump capver to 45
Change-Id: I9b4dfa5af44d2ecada6cc044cd1b5674ee427575
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
- removed some in-flow time calls
- increase buffer size to 2MB to overcome syscall cost
- move relative time computation from record to report time
Signed-off-by: James Tucker <james@tailscale.com>
* tailcfg, control/controlhttp, control/controlclient: add ControlDialPlan field
This field allows the control server to provide explicit information
about how to connect to it; useful if the client's link status can
change after the initial connection, or if the DNS settings pushed by
the control server break future connections.
Change-Id: I720afe6289ec27d40a41b3dcb310ec45bd7e5f3e
Signed-off-by: Andrew Dunham <andrew@tailscale.com>
Personal preference (so it's obvious it's not a bool flag), but it
also matches the --state= before it.
Bonus: stop allowing PORT to sneak in extra flags to be passed as
their own arguments, as $FOO and ${FOO} expand differently. (${FOO} is
required to concat to strings)
Change-Id: I994626a5663fe0948116b46a971e5eb2c4023216
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
We were just logging them to the console, which is useful for debugging,
but we may want to show them in the UI too.
Updates tailscale/corp#6939
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
This doesn't change any behaviour for now, other than maybe running a
full netcheck more often. The intent is to start gathering data on
captive portals, and additionally, seeing this in the 'tailscale
netcheck' command should provide a bit of additional information to
users.
Updates #1634
Change-Id: I6ba08f9c584dc0200619fa97f9fde1a319f25c76
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
d5e7e309 changed the `hostinfo.GetVersion` from distro and distro version
to UTS Name Release and moved distribution information under
`hostinfo.Distro*`.
`tailscale configure-host` command implementation for Synology DSM
environments relies on the old semantics of this string for matching DSM
Major version so it's been broken for a few days.
Pull in `hostinfo` and prefix match `hostinfo.DistroVersion` to match
DSM major version.
Signed-off-by: Berk D. Demir <bdd@mindcast.org>
5 seconds may not be enough if we're still loading the derp map and
connecting to a slow machine.
Updates #5693
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
The check was happening too early and in the case of error would wait 5
s and then error out. This makes it so that it does validations before
the SSH check.
Signed-off-by: Maisem Ali <maisem@tailscale.com>
ipnserver previously had support for a Windows-only environment
variable mechanism that further only worked when Windows was running
as a service, not from a console.
But we want it to work from tailscaed too, and we want it to work on
macOS and Synology. So move it to envknob, now that envknob can change
values at runtime post-init.
A future change will wire this up for more platforms, and do something
more for CLI flags like --port, which the bug was originally about.
Updates #5114
Change-Id: I9fd69a9a91bb0f308fc264d4a6c33e0cbe352d71
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This turns 'dialParams' into something more like net.Dialer, where
configuration fields are public on the struct.
Split out of #5648
Change-Id: I0c56fd151dc5489c3c94fb40d18fd639e06473bc
Signed-off-by: Andrew Dunham <andrew@tailscale.com>
The io/ioutil package has been deprecated as of Go 1.16 [1]. This commit
replaces the existing io/ioutil functions with their new definitions in
io and os packages.
Reference: https://golang.org/doc/go1.16#ioutil
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
The data that we send over WebSockets is encrypted and thus not
compressible. Additionally, Safari has a broken implementation of compression
(see nhooyr/websocket#218) that makes enabling it actively harmful.
Fixestailscale/corp#6943
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
