Don't be a DoH DNS server to peers unless the Tailnet admin has permitted
that peer autogroup:internet access.
Updates #1713
Change-Id: Iec69360d8e4d24d5187c26904b6a75c1dabc8979
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
If IP forwarding is disabled globally, but enabled per-interface on all interfaces,
don't complain. If only some interfaces have forwarding enabled, warn that some
subnet routing/exit node traffic may not work.
Fixes#1586
Signed-off-by: David Anderson <danderson@tailscale.com>
We were missing an argument here.
Also, switch to %q, in case anything weird
is happening with these strings.
Updates tailscale/corp#461
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Fixes regression from 81cabf48ec which made
all map errors be sent to the frontend UI.
Fixes#3230
Change-Id: I7f142c801c7d15e268a24ddf901c3e6348b6729c
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
For debugging Synology. Like the existing goroutines handler, in that
it's owner-only.
Change-Id: I852f0626be8e1c0b6794c1e062111d14adc3e6ac
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
github.com/go-multierror/multierror served us well.
But we need a few feature from it (implement Is),
and it's not worth maintaining a fork of such a small module.
Instead, I did a clean room implementation inspired by its API.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
At least until js/wasm starts using browser LocalStorage or something.
But for the foreseeable future, any login from a browser should
be considered ephemeral as the tab can close at any time and lose
the wireguard key, never to be seen again.
Updates #3157
Change-Id: I6c410d86dc7f9f233c3edd623313d9dee2085aac
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
iOS and Android no longer use these. They both now (as of today)
use the hostinfo.SetFoo setters instead.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Turns out the iOS client has been only sending the OS version it first
started at. This whole hostinfo-via-prefs mechanism was never a good idea.
Start removing it.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This fixes "tailscale cert" on Synology where the var directory is
typically like /volume2/@appdata/Tailscale, or any other tailscaled
user who specifies a non-standard state file location.
This is a interim fix on the way to #2932.
Fixes#2927
Updates #2932
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
So if the control plane knows that something's broken about the node, it can
include problem(s) in MapResponse and "tailscale status" will show it.
(and GUIs in the future, as it's in ipnstate.Status/JSON)
This also bumps the MapRequest.Version, though it's not strictly
required. Doesn't hurt.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
LocalBackend.Shutdown's docs say:
> The backend can no longer be used after Shutdown returns.
Nevertheless, TestStateMachine blithely calls Shutdown, talks some smack,
and continues on, expecting things to work. Other uses of Shutdown
in the codebase are as intended.
Things mostly kinda work anyway, except that the wgengine.Engine has been
shut down, so calls to Reconfig fail. Those get logged:
> local.go:603: wgengine status error: engine closing; no status
but otherwise ignored.
However, the Reconfig failure caused one fewer call to pause/unpause
than normal. Now the assertCalls lines match the equivalent ones
earlier in the test.
I don't see an obvious correct replacement for Shutdown in the context
of this test; I'm not sure entirely what it is trying to accomplish.
It is possible that many of the tests remaining after the prior call
to Shutdown are now extraneous. They don't harm anything, though,
so err on the side of safety and leave them for now.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Use helpers and variadic functions to make the call sites
a lot easier to read, since they occur a lot.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Concurrent calls to LocalBackend.setWgengineStatus
could result in some of the status updates being dropped.
This was exacerbated by 92077ae78c,
which increases the probability of concurrent status updates,
causing test failures (tailscale/corp#2579).
It's going to take a bit of work to fix this test.
The ipnlocal state machine is difficult to reason about,
particularly in the face of concurrency.
We could fix the test trivially by throwing a new mutex around
setWgengineStatus to serialize calls to it,
but I'd like to at least try to do better than cosmetics.
In the meantime, commit the test.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
In prep for other bug fixes & tests. It's hard to test when it was
intermingled into LocalBackend.authReconfig.
Now it's a pure function.
And rename variable 'uc' (user config?) to the since idiomatic
'prefs'.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
We currently plumb full URLs for DNS resolvers from the control server
down to the client. But when we pass the values into the net/dns
package, we throw away any URL that isn't a bare IP. This commit
continues the plumbing, and gets the URL all the way to the built in
forwarder. (It stops before plumbing URLs into the OS configurations
that can handle them.)
For #2596
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
* Revert "Revert "types/key: add MachinePrivate and MachinePublic.""
This reverts commit 61c3b98a24.
Signed-off-by: David Anderson <danderson@tailscale.com>
* types/key: add ControlPrivate, with custom serialization.
ControlPrivate is just a MachinePrivate that serializes differently
in JSON, to be compatible with how the Tailscale control plane
historically serialized its private key.
Signed-off-by: David Anderson <danderson@tailscale.com>
Plumb throughout the codebase as a replacement for the mixed use of
tailcfg.MachineKey and wgkey.Private/Public.
Signed-off-by: David Anderson <danderson@tailscale.com>
And add health check errors to ipnstate.Status (tailscale status --json).
Updates #2746
Updates #2775
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The number of packet filters can grow very large,
so this log entry can be very large.
We can get the packet filter server-side,
so reduce verbosity here to just the number of filters present.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Now that we have the easier-to-parse go:build build tags,
it is straightforward to simplify them. Yay.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
The fact that Hash returns a [sha256.Size]byte leaks details about
the underlying hash implementation. This could very well be any other
hashing algorithm with a possible different block size.
Abstract this implementation detail away by declaring an opaque type
that is comparable. While we are changing the signature of UpdateHash,
rename it to just Update to reduce stutter (e.g., deephash.Update).
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
With this, I can now:
* install Tailscale
* stop the GUI
* net stop Tailscale
* net start Tailscale
* tailscale up --unattended
(where the middle three steps simulate what would happen on a Windows
Server Core machine without a GUI)
Fixes#2137
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Regression from 6d10655dc3, which added
UpdatePrefs but didn't write it out to disk.
I'd planned on adding tests to state_test.go which is why I'd earlier
added 46896a9311 to prepare for making
such persistence tests easier to write, but turns out state_test.go
didn't even test UpdatePrefs, so I'm staying out of there.
Instead, this is tested using integration tests.
Fixes#2321
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
We can't access b.netMap without holding b.mu.
We already grabbed it earlier in the function with the lock held.
Introduced in Nov 2020 in 7ea809897d.
Discovered during stress testing.
Apparently it's a pretty rare?
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
After allowing for custom DERP maps, it's convenient to be able to see their latency in
netcheck. This adds a query to the local tailscaled for the current DERPMap.
Updates #1264
Signed-off-by: julianknodt <julianknodt@gmail.com>
We were crashing on in initPeerAPIListener when called from
authReconfig when b.netMap is nil. But authReconfig already returns
before the call to initPeerAPIListener when b.netMap is nil, but it
releases the b.mu mutex before calling initPeerAPIListener which
reacquires it and assumes it's still nil.
The only thing that can be setting it to nil is setNetMapLocked, which
is called by ResetForClientDisconnect, Logout/logout, or Start, all of
which can happen during an authReconfig.
So be more defensive.
Fixes#1996
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
We used to use "redo" for that, but it was pretty vague.
Also, fix the build tags broken in interfaces_default_route_test.go from
a9745a0b68, moving those Linux-specific
tests to interfaces_linux_test.go.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The resulting empty Prefs had AllowSingleHosts=false and
Routeall=false, so that on iOS if you did these steps:
- Login and leave running
- Terminate the frontend
- Restart the frontend (fast path restart, missing prefs)
- Set WantRunning=false
- Set WantRunning=true
...then you would have Tailscale running, but with no routes. You would
also accidentally disable the ExitNodeID/IP prefs (symptom: the current
exit node setting didn't appear in the UI), but since nothing
else worked either, you probably didn't notice.
The fix was easy enough. It turns out we already knew about the
problem, so this also fixes one of the BUG entries in state_test.
Fixes: #1918 (BUG-1) and some as-yet-unreported bugs with exit nodes.
Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
Previously, there was no server round trip required to log out, so when
you asked ipnlocal to Logout(), it could clear the netmap immediately
and switch to NeedsLogin state.
In v1.8, we added a true Logout operation. ipn.Logout() would trigger
an async cc.StartLogout() and *also* immediately switch to NeedsLogin.
Unfortunately, some frontends would see NeedsLogin and immediately
trigger a new StartInteractiveLogin() operation, before the
controlclient auth state machine actually acted on the Logout command,
thus accidentally invalidating the entire logout operation, retaining
the netmap, and violating the user's expectations.
Instead, add a new LogoutFinished signal from controlclient
(paralleling LoginFinished) and, upon starting a logout, don't update
the ipn state machine until it's received.
Updates: #1918 (BUG-2)
Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
On clean installs we didn't set use iptables, but during upgrades it
looks like we could use old prefs that directed us to go into the iptables
paths that might fail on Synology.
Updates #1995Fixestailscale/tailscale-synology#57 (I think)
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This leads to a cleaner separation of intent vs. implementation
(Routes is now the only place specifying who handles DNS requests),
and allows for cleaner expression of a configuration that creates
MagicDNS records without serving them to the OS.
Signed-off-by: David Anderson <danderson@tailscale.com>
