Commit Graph

389 Commits (b0382ca1670d75a4fdfcb7ce5bbb864f6d2ecfb2)

Author SHA1 Message Date
Avery Pennarun b0382ca167 ipn/ipnlocal: some state_test cleanups.
This doesn't change the actual functionality. Just some additional
comments and fine tuning.

Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
4 years ago
Avery Pennarun ac9cd48c80 ipnlocal: fix deadlock when calling Shutdown() from Start().
Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
4 years ago
Avery Pennarun ecdba913d0 Revert "ipn/ipnlocal: be authoritative for the entire MagicDNS record tree."
Unfortunately this broke MagicDNS almost entirely.

Updates: tailscale/corp#1706

This reverts commit 1d7e7b49eb.
4 years ago
Avery Pennarun b7e31ab1a4 ipn: mock controlclient.Client; big ipn.Backend state machine test.
A very long unit test that verifies the way the controlclient and
ipn.Backend interact.

This is a giant sequential test of the state machine. The test passes,
but only because it's asserting all the wrong behaviour. I marked all
the behaviour I think is wrong with BUG comments, and several
additional test opportunities with TODO.

Note: the new test supercedes TestStartsInNeedsLoginState, which was
checking for incorrect behaviour (although the new test still checks
for the same incorrect behaviour) and assumed .Start() would converge
before returning, which it happens to do, but only for this very
specific case, for the current implementation. You're supposed to wait
for the notifications.

Updates: tailscale/corp#1660

Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
4 years ago
Avery Pennarun b4d04a065f controlclient: extract a Client interface and rename Client->Auto.
This will let us create a mock or fake Client implementation for use
with ipn.Backend.

Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
4 years ago
David Anderson 1d7e7b49eb ipn/ipnlocal: be authoritative for the entire MagicDNS record tree.
With this change, shared node names resolve correctly on split DNS-supporting
operating systems.

Fixes tailscale/corp#1706

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick b7a497a30b ipn/ipnlocal: make FileTargets check IPN state first
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 4bf6939ee0 ipn/ipnlocal: remove t.Parallel from recently added test
The test modifies a global; it shouldn't be parallel.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick a48c8991f1 ipn/ipnlocal: add a test for earlier lazy machine key generation change
Updates #1573

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 306a094d4b ipn/ipnlocal: remove IPv6 records from MagicDNS.
Fixes #1813.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick 3bdc9e9cb2 ipn/ipnlocal: prevent a now-expected [unexpected] log message on Windows
Updates #1620

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 138921ae40 ipn/ipnlocal: always write files to partial files, even in buffered mode
The intention was always that files only get written to *.partial
files and renamed at the end once fully received, but somewhere in the
process that got lost in buffered mode and *.partial files were only
being used in direct receive mode. This fix prevents WaitingFiles
from returning files that are still being transferred.

Updates tailscale/corp#1626

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 5e268e6153 ipn/ipnlocal: use delete marker files to work around Windows delete problems
If DeleteFile fails on Windows due to another process (anti-virus,
probably) having our file open, instead leave a marker file that the
file is logically deleted, and remove it from API calls and clean it
up lazily later.

Updates tailscale/corp#1626

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Aleksandar Pesic 7c985e4944 ipn/ipnlocal: add file sharing to windows shell
Updates: tailscale/winmin#33

Signed-off-by: Aleksandar Pesic <peske.nis@gmail.com>
4 years ago
Brad Fitzpatrick fe53a714bd ipn/ipnlocal: add a LocalBackend.Start fast path if already running
Updates tailscale/corp#1621

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick ad1a595a75 ipn/ipnlocal: close peer API listeners on transition away from Running
Updates tailscale/corp#1621

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 8a449c4dcd ipn: define NewBackendServer nil as not affecting Backend's NotifyCallback
Updates tailscale/corp#1646

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 36d030cc36 ipn/ipnlocal: use fallback default DNS whenever exit nodes are on.
Fixes #1625

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick 86e85d8934 ipn/ipnlocal: add peerapi goroutine fetch
Between owners.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 2d786821f6 ipn/ipnlocal: put a retry loop around Windows file deletes
oh, Windows.

Updates tailscale/corp#1626

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 529ef98b2a ipn/ipnlocal: fix approxSize operator precedence
Whoops.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick b03c23d2ed ipn/ipnlocal: log on DeleteFile error
Updates tailscale/corp#1626

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 2f17a34242 ipn/ipnlocal: fix tailscale status --json AuthURL field
It was getting cleared on notify.

Document that authURL is cleared on notify and add a new field that
isn't, using the new field for the JSON status.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 09891b9868 ipn/ipnlocal: on fresh lazy-connecting install, start in state NeedsLogin
Fixes #1759

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 91c9c33036 cmd/tailscaled: don't block ipnserver startup behind engine init on Windows
With this change, the ipnserver's safesocket.Listen (the localhost
tcp.Listen) happens right away, before any synchronous
TUN/DNS/Engine/etc setup work, which might be slow, especially on
early boot on Windows.

Because the safesocket.Listen starts up early, that means localhost
TCP dials (the safesocket.Connect from the GUI) complete successfully
and thus the GUI avoids the MessageBox error. (I verified that
pacifies it, even without a Listener.Accept; I'd feared that Windows
localhost was maybe special and avoided the normal listener backlog).

Once the GUI can then connect immediately without errors, the various
timeouts then matter less, because the backend is no longer trying to
race against the GUI's timeout. So keep retrying on errors for a
minute, or 10 minutes if the system just booted in the past 10
minutes.

This should fix the problem with Windows 10 desktops auto-logging in
and starting the Tailscale frontend which was then showing a
MessageBox error about failing to connect to tailscaled, which was
slow coming up because the Windows networking stack wasn't up
yet. Fingers crossed.

Fixes #1313 (previously #1187, etc)

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 6fd9e28bd0 ipn/ipnlocal: add arpa suffixes to MagicDNS for reverse lookups.
This used to not be necessary, because MagicDNS always did full proxying.
But with split DNS, we need to know which names to route to our resolver,
otherwise reverse lookups break.

This captures the entire CGNAT range, as well as our Tailscale ULA.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 48d4f14652 ipn/ipnlocal: only set authoritative domains when using MagicDNS.
Otherwise, the existence of authoritative domains forces full
DNS proxying even when no other DNS config is present.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick f99e63bb17 ipn: don't Logout when Windows GUI disconnects
Logout used to be a no-op, so the ipnserver previously synthensized a Logout
on disconnect. Now that Logout actually invalidates the node key that was
forcing all GUI closes to log people out.

Instead, add a method to LocalBackend to specifically mean "the
Windows GUI closed, please forget all the state".

Fixes tailscale/corp#1591 (ignoring the notification issues, tracked elsewhere)

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 1e5c608fae ipn/ipnlocal: plumb fallback DNS in as a workaround for split DNS issues.
Cause of #1743.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick 3d0599fca0 ipn{,/ipnlocal}: in direct file receive mode, don't rename partial file
Let caller (macOS) do it so Finder progress bar can be dismissed
without races.

Updates tailscale/corp#1575

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick a58fbb4da9 ipn/ipnlocal: only fix peerapiListener on Windows when running
It's just logspam otherwise.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Maisem Ali 36fa29feec ipn/ipnlocal: restrict local lan access to linux machines.
Signed-off-by: Maisem Ali <maisem@tailscale.com>
4 years ago
Brad Fitzpatrick 8570f82c8b ipn/ipnlocal: finish/fix up filename validation & encoding on disk
It used to just store received files URL-escaped on disk, but that was
a half done lazy implementation, and pushed the burden to callers to
validate and write things to disk in an unescaped way.

Instead, do all the validation in the receive handler and only
accept filenames that are UTF-8 and in the intersection of valid
names that all platforms support.

Fixes tailscale/corp#1594

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick cad8df500c ipn/ipnlocal: add some more peerapi handlePeerPut tests
Updates tailscale/corp#1594

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 0d1550898e ipn/ipnlocal: add some peerapi tests
Updates tailscale/corp#1594

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 8f3e453356 ipn, cmd/tailscale/cli: add pref to configure sudo-free operator user
From discussion with @danderson.

Fixes #1684 (in a different way)

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 49808ae6ea ipn{,/ipnlocal}, cmd/tailscale/cli: don't check pref reverts on initial up
The ipn.NewPrefs func returns a populated ipn.Prefs for historical
reasons. It's not used or as important as it once was, but it hasn't
yet been removed. Meanwhile, it contains some default values that are
used on some platforms. Notably, for this bug (#1725), Windows/Mac use
its Prefs.RouteAll true value (to accept subnets), but Linux users
have always gotten a "false" value for that, because that's what
cmd/tailscale's CLI default flag is _for all operating systems_.  That
meant that "tailscale up" was rightfully reporting that the user was
changing an implicit setting: RouteAll was changing from true with
false with the user explicitly saying so.

An obvious fix might be to change ipn.NewPrefs to return
Prefs.RouteAll == false on some platforms, but the logic is
complicated by darwin: we want RouteAll true on windows, android, ios,
and the GUI mac app, but not the CLI tailscaled-on-macOS mode. But
even if we used build tags (e.g. the "redo" build tag) to determine
what the default is, that then means we have duplicated and differing
"defaults" between both the CLI up flags and ipn.NewPrefs. Furthering
that complication didn't seem like a good idea.

So, changing the NewPrefs defaults is too invasive at this stage of
the release, as is removing the NewPrefs func entirely.

Instead, tweak slightly the semantics of the ipn.Prefs.ControlURL
field. This now defines that a ControlURL of the empty string means
both "we're uninitialized" and also "just use the default".

Then, once we have the "empty-string-means-unintialized" semantics,
use that to suppress "tailscale up"'s recent implicit-setting-revert
checking safety net, if we've never initialized Tailscale yet.

And update/add tests.

Fixes #1725

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 4df6e62fbc ipn: add DefaultControlURL const, replace few literals with it
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick b993d9802a ipn/ipnlocal, etc: require file sharing capability to send/recv files
tailscale/corp#1582

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick d6a95d807a ipn/ipnlocal: advertise netstack to control server
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 762180595d ipn/ipnstate: add PeerStatus.TailscaleIPs slice, deprecate TailAddr
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 34d2f5a3d9 tailcfg: add Endpoint, EndpointType, MapRequest.EndpointType
Track endpoints internally with a new tailcfg.Endpoint type that
includes a typed netaddr.IPPort (instead of just a string) and
includes a type for how that endpoint was discovered (STUN, local,
etc).

Use []tailcfg.Endpoint instead of []string internally.

At the last second, send it to the control server as the existing
[]string for endpoints, but also include a new parallel
MapRequest.EndpointType []tailcfg.EndpointType, so the control server
can start filtering out less-important endpoint changes from
new-enough clients. Notably, STUN-discovered endpoints can be filtered
out from 1.6+ clients, as they can discover them amongst each other
via CallMeMaybe disco exchanges started over DERP. And STUN endpoints
change a lot, causing a lot of MapResposne updates. But portmapped
endpoints are worth keeping for now, as they they work right away
without requiring the firewall traversal extra RTT dance.

End result will be less control->client bandwidth. (despite negligible
increase in client->control bandwidth)

Updates tailscale/corp#1543

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick b91f3c4191 ipn/ipnlocal: fix peerapi printf arg mismatch
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 1f4cf1a4f4 ipn/localapi: only require read access to list file targets
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick db5e269463 client/tailscale/apitype: move local API types to new apitype package
They were scattered/duplicated in misc places before.

It can't be in the client package itself for circular dep reasons.

This new package is basically tailcfg but for localhost
communications, instead of to control.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Maisem Ali 1b9d8771dc ipn/ipnlocal,wgengine/router,cmd/tailscale: add flag to allow local lan access when routing traffic via an exit node.
For #1527

Signed-off-by: Maisem Ali <maisem@tailscale.com>
4 years ago
Brad Fitzpatrick 8e75c8504c ipn/ipnlocal: in direct file mode, don't readdir
And don't even allow attempts at Open/Delete.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 9972c02b60 cmd/tailscale/cli: don't let up change prefs based on implicit flag values
This changes the behavior of "tailscale up".

Previously "tailscale up" always did a new Start and reset all the settings.

Now "tailscale up" with no flags just brings the world [back] up.
(The opposite of "tailscale down").

But with flags, "tailscale up" now only is allowed to change
preferences if they're explicitly named in the flags. Otherwise it's
an error. Or you need to use --reset to explicitly nuke everything.

RELNOTE=tailscale up change

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick f5742b0647 ipn/ipnlocal: add LocalBackend.SetDirectFileRoot
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick a3113a793a ipn: add hostname to Prefs.Pretty output
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago