Commit Graph

231 Commits (ab9cccb292a81b1cfba9e91e0cdd8b1461bbf48a)

Author SHA1 Message Date
Brad Fitzpatrick b560386c1a net/packet, wgengine, tstun: add inter-node TSMP protocol for connect errors
This adds a new IP Protocol type, TSMP on protocol number 99 for
sending inter-tailscale messages over WireGuard, currently just for
why a peer rejects TCP SYNs (ACL rejection, shields up, and in the
future: nothing listening, something listening on that port but wrong
interface, etc)

Updates #1094
Updates tailscale/corp#1185

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 5611f290eb ipn, ipnserver: only require sudo on Linux for mutable CLI actions
This partially reverts d6e9fb1df0, which modified the permissions
on the tailscaled Unix socket and thus required "sudo tailscale" even
for "tailscale status".

Instead, open the permissions back up (on Linux only) but have the
server look at the peer creds and only permit read-only actions unless
you're root.

In the future we'll also have a group that can do mutable actions.

On OpenBSD and FreeBSD, the permissions on the socket remain locked
down to 0600 from d6e9fb1df0.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick d6e9fb1df0 all: adjust Unix permissions for those without umasks
Fixes tailscale/corp#1165

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Sonia Appasamy 024671406b
ipn: only send services in Hostinfo if Tailnet has opted-in to services collection (#1107)
Signed-off-by: Sonia Appasamy <sonia@tailscale.com>
4 years ago
Brad Fitzpatrick 5aa5db89d6 cmd/tailscaled, wgengine/netstack: add start of gvisor userspace netstack work
Not usefully functional yet (mostly a proof of concept), but getting
it submitted for some work @namansood is going to do atop this.

Updates #707
Updates #634
Updates #48
Updates #835
4 years ago
Brad Fitzpatrick 5efb0a8bca cmd/tailscale: change formatting of "tailscale status"
* show DNS name over hostname, removing domain's common MagicDNS suffix.
  only show hostname if there's no DNS name.
  but still show shared devices' MagicDNS FQDN.

* remove nerdy low-level details by default: endpoints, DERP relay,
  public key.  They're available in JSON mode still for those who need
  them.

* only show endpoint or DERP relay when it's active with the goal of
  making debugging easier. (so it's easier for users to understand
  what's happening) The asterisks are gone.

* remove Tx/Rx numbers by default for idle peers; only show them when
  there's traffic.

* include peers' owner login names

* add CLI option to not show peers (matching --self=true, --peers= also
  defaults to true)

* sort by DNS/host name, not public key

* reorder columns
4 years ago
Josh Bleecher Snyder 18471a8792 ipn: close logger at the end of TestLocalLogLines
If any goroutine continues to use the logger in TestLocalLogLines
after the test finishes, the test panics.

The culprit for this was wireguard-go; the previous commit fixed that.
This commit adds suspenders: When the test is done, make logging calls
into no-ops.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
4 years ago
Denton Gentry fa3e8e1a28 Add names to test cases in ipn/local_test.go.
There are so many now that just a number doesn't work well.

Signed-off-by: Denton Gentry <dgentry@tailscale.com>
4 years ago
Denton Gentry 414cb4a695 Add test for dnsMapsEqual.
Exercises most cases in the function.

Signed-off-by: Denton Gentry <dgentry@tailscale.com>
4 years ago
Brad Fitzpatrick b5129dadfd ipn: fix buggy-looking format string in error log
On shutdown, logs showed:
wgengine status error: &errors.errorString{s:"engine closing; no status"}
4 years ago
Brad Fitzpatrick e8ae355bb8
ipn: delete domainsForProxying, require explicit DNS search domains (mapver 9) (#1078)
Previously the client had heuristics to calculate which DNS search domains
to set, based on the peers' names. Unfortunately that prevented us from
doing some things we wanted to do server-side related to node sharing.

So, bump MapRequest.Version to 9 to signal that the client only uses the
explicitly configured DNS search domains and doesn't augment it with its own
list.

Updates tailscale/corp#1026

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Josh Bleecher Snyder 56a7652dc9 wgkey: new package
This is a replacement for the key-related parts
of the wireguard-go wgcfg package.

This is almost a straight copy/paste from the wgcfg package.
I have slightly changed some of the exported functions and types
to avoid stutter, added and tweaked some comments,
and removed some now-unused code.

To avoid having wireguard-go depend on this new package,
wgcfg will keep its key types.

We translate into and out of those types at the last minute.
These few remaining uses will be eliminated alongside
the rest of the wgcfg package.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
4 years ago
Josh Bleecher Snyder 2fe770ed72 all: replace wgcfg.IP and wgcfg.CIDR with netaddr types
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
4 years ago
Brad Fitzpatrick 053a1d1340 all: annotate log verbosity levels on most egregiously spammy log prints
Fixes #924
Fixes #282

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 294ceb513c ipn, wgengine/magicsock: fix `tailscale status` display.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Christine Dodrill 2485faf69a
Merge branch 'main' into report-status-systemd 4 years ago
Christine Dodrill 7ea809897d ipn/ipnserver: enable systemd-notify support
Addresses #964

Still to be done:
- Figure out the correct logging lines in util/systemd
- Figure out if we need to slip the systemd.Status function anywhere
  else
- Log util/systemd errors? (most of the errors are of the "you cannot do
  anything about this, but it might be a bad idea to crash the program if
  it errors" kind)

Assistance in getting this over the finish line would help a lot.

Signed-off-by: Christine Dodrill <me@christine.website>

util/systemd: rename the nonlinux file to appease the magic

Signed-off-by: Christine Dodrill <me@christine.website>

util/systemd: fix package name

Signed-off-by: Christine Dodrill <me@christine.website>

util/systemd: fix review feedback from @mdlayher

Signed-off-by: Christine Dodrill <me@christine.website>

cmd/tailscale{,d}: update depaware manifests

Signed-off-by: Christine Dodrill <me@christine.website>

util/systemd: use sync.Once instead of func init

Signed-off-by: Christine Dodrill <me@christine.website>

control/controlclient: minor review feedback fixes

Signed-off-by: Christine Dodrill <me@christine.website>

{control,ipn,systemd}: fix review feedback

Signed-off-by: Christine Dodrill <me@christine.website>

review feedback fixes

Signed-off-by: Christine Dodrill <me@christine.website>

ipn: fix sprintf call

Signed-off-by: Christine Dodrill <me@christine.website>

ipn: make staticcheck less sad

Signed-off-by: Christine Dodrill <me@christine.website>

ipn: print IP address in connected status

Signed-off-by: Christine Dodrill <me@christine.website>

ipn: review feedback

Signed-off-by: Christine Dodrill <me@christine.website>

final fixups

Signed-off-by: Christine Dodrill <me@christine.website>
4 years ago
Josh Bleecher Snyder a6cad71fb2 go.mod: upgrade staticcheck to 0.1.0
Also run go.mod and fix some staticcheck warnings.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
4 years ago
David Anderson dfbde3d3aa ipn: pass through the prefix length from control.
Control sets this to /32 for IPv4 and /128 for IPv6.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick c0af7deb86 tailcfg, cmd/tailscale: add Hostinfo.ShareeNode, hide in "tailscale status" 4 years ago
Brad Fitzpatrick cd6099113f ipn: add a comment about skipping files with null bytes
Updates #954
4 years ago
Alex Brainman 72e082aaf5 ipn: make LoadPrefs return os.ErrNotExist when reading corrupted files
It appears some users have corrupted pref.conf files. Have LoadPrefs
treat these files as non-existent. This way tailscale will make user
login, and not crash.

Fixes #954

Signed-off-by: Alex Brainman <alex.brainman@gmail.com>
4 years ago
Sonia Appasamy 0710fca0cd
tailcfg: include ShieldsUp in HostInfo 4 years ago
Brad Fitzpatrick acade77c86 ipn/ipnserver: add knob to disable babysitter 4 years ago
Brad Fitzpatrick 19b0cfe89e all: prepare for GOOS=ios in Go 1.16
Work with either way for now on iOS (darwin/arm64 vs ios/arm64).

In February when Go 1.16 comes out we'll have a universal binary for
darwin/arm64 (macOS) and will drop support for Go 1.15 and its
darwin/amd64 meaning iOS. (it'll mean macOS).

Context:

* https://tip.golang.org/doc/go1.16#darwin
* https://github.com/golang/go/issues/38485
* https://github.com/golang/go/issues/42100
4 years ago
Brad Fitzpatrick d21956436a ipn, tailcfg: change Windows subnet disabling behavior w/ WPAD
In 1.0, subnet relays were not specially handled when WPAD+PAC was
present on the network.

In 1.2, on Windows, subnet relays were disabled if WPAD+PAC was
present. That was what some users wanted, but not others.

This makes it configurable per domain, reverting back to the 1.0
default state of them not being special. Users who want that behavior
can then enable it.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 76d99cf01a wgengine/filter: remove the Matches type.
It only served to obscure the underlying slice type without
adding much value.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson b3634f020d wgengine/filter: use netaddr types in public API.
We still use the packet.* alloc-free types in the data path, but
the compilation from netaddr to packet happens within the filter
package.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick b4e19b95ed ipn: debug zero bytes in IPN json messages
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 8f30fa67aa ipn: treat zero-length file state store file as missing
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 4f4e84236a ipn: clean up Prefs logging at start
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 6bcb466096 ipn: disambiguate how machine key was initialized
Seeing "frontend-provided legacy machine key" was weird (and not quite
accurate) on Linux machines where it comes from the _daemon key's
persist prefs, not the "frontend".

Make the log message distinguish between the cases.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 07b6ffd55c ipn: only use Prefs, not computed stateKey, to determine server mode
When the service was running without a client (e.g. after a reboot)
and then the owner logs in and the GUI attaches, the computed state
key changed to "" (driven by frontend prefs), and then it was falling
out of server mode, despite the GUI-provided prefs still saying it
wanted server mode.

Also add some logging. And remove a scary "Access denied" from a
user-visible error, making the two possible already-in-use error
messages consistent with each other.
4 years ago
Brad Fitzpatrick 20a357b386 ipn, ipn/ipnserver: add IPN state for server in use, handle explicitly
On Windows, we were previously treating a server used by different
users as a fatal error, which meant the second user (upon starting
Tailscale, explicitly or via Start Up programs) got an invasive error
message dialog.

Instead, give it its own IPN state and change the Notify.ErrMessage to
be details in that state. Then the Windows GUI can be less aggresive
about that happening.

Also,

* wait to close the IPN connection until the server ownership state
  changes so the GUI doesn't need to repeatedly reconnect to discover
  changes.

* fix a bug discovered during testing: on system reboot, the
  ipnserver's serverModeUser was getting cleared while the state
  transitioned from Unknown to Running. Instead, track 'inServerMode'
  explicitly and remove the old accessor method which was error prone.

* fix a rare bug where the client could start up and set the server
  mode prefs in its Start call and we wouldn't persist that to the
  StateStore storage's prefs start key. (Previously it was only via a
  prefs toggle at runtime)
4 years ago
Brad Fitzpatrick f3aa08de76 ipn/ipnserver: remove "Server mode" from a user-visible error message
That's an internal nickname.
4 years ago
Brad Fitzpatrick cc3259f8d9 ipn: fix crash generating machine key on new installs
Regression from d6ad41dcea (for #732).

Probably also means eab6e9ea4e was unnecessary, but it's fine.

Fixes #887
4 years ago
Brad Fitzpatrick 01ee638cca Change some os.IsNotExist to errors.Is(err, os.ErrNotExist) for non-os errors.
os.IsNotExist doesn't unwrap errors. errors.Is does.

The ioutil.ReadFile ones happened to be fine but I changed them so
we're consistent with the rule: if the error comes from os, you can
use os.IsNotExist, but from any other package, use errors.Is.
(errors.Is always would also work, but not worth updating all the code)

The motivation here was that we were logging about failure to migrate
legacy relay node prefs file on startup, even though the code tried
to avoid that.

See golang/go#41122
4 years ago
Elias Naur eab6e9ea4e ipn: don't temporarilySetMachineKeyInPersist for Android clients
Without this change, newly installed Android clients crash on startup
with

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x9881b9f8]

goroutine 29 [running]:
tailscale.com/ipn.(*LocalBackend).initMachineKeyLocked.func1(0x50cb1b9c, 0x503c9a00)
	/home/elias/proj/tailscale/ipn/local.go:711 +0x2c
tailscale.com/ipn.(*LocalBackend).initMachineKeyLocked(0x503c9a00, 0x0, 0x0)
	/home/elias/proj/tailscale/ipn/local.go:736 +0x728
tailscale.com/ipn.(*LocalBackend).loadStateLocked(0x503c9a00, 0x988be40e, 0xb, 0x0, 0x0, 0x0, 0x0, 0x0)
	/home/elias/proj/tailscale/ipn/local.go:817 +0x1e8
tailscale.com/ipn.(*LocalBackend).Start(0x503c9a00, 0x0, 0x0, 0x988be40e, 0xb, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	/home/elias/proj/tailscale/ipn/local.go:412 +0x200
main.(*backend).Start(...)
	/home/elias/proj/tailscale-android/cmd/tailscale/backend.go:116
main.(*App).runBackend.func3(0x50106340, 0x5000c060, 0x50d9a280)
	/home/elias/proj/tailscale-android/cmd/tailscale/main.go:169 +0x90
created by main.(*App).runBackend
	/home/elias/proj/tailscale-android/cmd/tailscale/main.go:168 +0x27c

Signed-off-by: Elias Naur <mail@eliasnaur.com>
4 years ago
Brad Fitzpatrick 2b819ab38c ipn: don't log redundant peer stats so often
It was especially bad on our GUI platforms with a frontend that polls it.

No need to log it every few seconds if it's unchanged. Make it slightly
less allocate-y while I'm here.
4 years ago
Brad Fitzpatrick ff7ddd9d20 ipn/ipnserver: move Windows local disk logging up to the parent process
To capture panics, log.Printf writes to os.Stderr, etc.

Fixes #726
4 years ago
Brad Fitzpatrick c64718e9a0 ipn/ipnserver: work around os/user.LookupId failure on Windows
If we can't find the mapping from SID ("user ID") -> username, don't
treat that as a fatal. Apparently that happens in the wild for Reasons.
Ignore it for now. It's just a nice-to-have for error messages in the
rare multi-user case.

Updates #869

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 54e6c3a290 version: use OSS repo's version when building.
When building with redo, also include the git commit hash
from the proprietary repo, so that we have a precise commit
that identifies all build info (including Go toolchain version).

Add a top-level build script demonstrating to downstream distros
how to burn the right information into builds.

Adjust `tailscale version` to print commit hashes when available.

Fixes #841.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick d6ad41dcea ipn: send machine key to clients so they can downgrade to 1.0.x if needed
Fixes #732

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick e72f480d22 ipn: convert an int to a bool 4 years ago
Brad Fitzpatrick 999bc93a4d ipn: log active account on change
Updates tailscale/corp#461
4 years ago
Brad Fitzpatrick 66d196326f ipn: rename 'new' variable to 'newp'
Both to avoid shadowing new and because new is a little vague for such
a long method handling multiple new & old things.
4 years ago
Brad Fitzpatrick 6b1d2a5630 ipn: don't set DebugFlags to len 1 slice of empty string [""]
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 62d941dc26 tailcfg: add a DebugFlags field for experiments and debugging.
Also replaces the IPv6Overlay bool with use of DebugFlags, since
it's currently an experimental configuration.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick 7c8ca28c74 ipn: use cmd/cloner for Prefs.Clone
Also, make cmd/cloner's top-level "func Clone" generation opt-in.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 1fd9958e9d ipn: wait for initial portpoll result before starting controlclient
We were creating the controlclient and starting the portpoll concurrently,
which frequently resulted in the first controlclient connection being canceled
by the firsdt portpoll result ~milliseconds later, resulting in another
HTTP request.

Instead, wait a bit for the first portpoll result so it's much less likely to
interrupt our controlclient connection.

Updates tailscale/corp#557
4 years ago