Commit Graph

3169 Commits

Author SHA1 Message Date
Brad Fitzpatrick
6b1d2a5630 ipn: don't set DebugFlags to len 1 slice of empty string [""]
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-10-20 10:48:59 -07:00
Brad Fitzpatrick
691f1d5c1d types/flagtype: fix bug showing the default port value (shown in --help) 2020-10-19 20:18:31 -07:00
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>
2020-10-19 17:03:04 -07:00
Brad Fitzpatrick
ac866054c7 wgengine/magicsock: add a backoff on DERP reconnects
Fixes #808
2020-10-19 15:15:40 -07:00
Brad Fitzpatrick
22024a38c3 control/controlclient: log Hostinfo on change
Fixes #830

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-10-19 14:49:22 -07:00
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>
2020-10-19 12:15:49 -07:00
Brad Fitzpatrick
6cc6e251a9 logpolicy: add debug knob to force logging time to terminal 2020-10-19 08:10:05 -07:00
Brad Fitzpatrick
86c271caba types/logger: move RusagePrefixLog to logger package, disable by default
The RusagePrefixLog is rarely useful, hasn't been useful in a long
time, is rarely the measurement we need, and is pretty spammy (and
syscall-heavy). Disable it by default. We can enable it when we're
debugging memory.
2020-10-19 07:56:23 -07:00
David Anderson
ff0cf6340a wgengine/router: fix configuration of loopback netfilter rules for v6.
Signed-off-by: David Anderson <danderson@tailscale.com>
2020-10-15 15:15:24 -07:00
David Anderson
5c35c35e7f tsaddr: add helpers for the Tailscale IPv6 range, and 4to6 conversion.
Signed-off-by: David Anderson <danderson@tailscale.com>
2020-10-15 15:15:24 -07:00
David Anderson
c6dbd24f67 tailcfg: add a field to advertise support for IPv6 tailscale config.
Signed-off-by: David Anderson <danderson@tailscale.com>
2020-10-15 15:15:24 -07:00
Brad Fitzpatrick
7a2a3955d3 logtail/filch: skip a broken test on Windows
Add a TODO with some notes about why it's skipped for now.

Updates #50
2020-10-14 21:33:01 -07:00
Brad Fitzpatrick
a6c34bdc28 control/controlclient: also include our own profile (for when no self-owned peers)
Fix from regression in previous commit
(0e3048d8e0) that was caught by e2e
tests.

In that previous commit, the user's own profile was omitted from the
NetworkMap in the case where the user only had one node.
2020-10-14 19:07:31 -07:00
Brad Fitzpatrick
0e3048d8e0 control/controlclient: support delta userprofiles from control
I was going to make support for this advertised from the client, but
turns out only "tailscale status" even uses the UserProfiles field and
fails gracefully (omits that field) if a user profile for a user is
missing, so I think we can just reuse the DeltaPeers field from the
client to ask the control server to also delta encode the user
profiles.

For the few users running 1.1.x (unstable) versions between DeltaPeers
support (1.1.82) and this (~1.1.541), they'll just sometimes have
missing names in "tailscale status --json" or "tailscale status --web"
(the only places the UserProfile is used).
2020-10-14 18:46:07 -07:00
Brad Fitzpatrick
82f2fdc194 control/controlclient: adjust some logging point names
The previous code read too explicitly like log.Printf("I am here1"),
log.Printf("I am here2"). It still is with this change, but prettier, and
less subject to code rearranging order.
2020-10-14 14:39:42 -07:00
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
2020-10-14 14:07:40 -07:00
Brad Fitzpatrick
1819f6f8c8 control/controlclient: set MapRequest.ReadOnly on initial empty endpoint request
On startup, clients do a MapRequest with empty endpoints while they
learn the DERP map to discover the STUN servers they then query to
learn their endpoints.

Set MapRequest.ReadOnly on those initial queries to not broadcast the
empty endpoints out to peers. The read results will come a half second
later (or less).

Updates tailscale/corp#557
2020-10-14 14:01:33 -07:00
Brad Fitzpatrick
105a820622 wgengine/magicsock: skip an endpoint update at start-up
At startup the client doesn't yet have the DERP map so can't do STUN
queries against DERP servers, so it only knows it local interface
addresses, not its STUN-mapped addresses.

We were reporting the interface-local addresses to control, getting
the DERP map, and then immediately reporting the full set of
updates. That was an extra HTTP request to control, but worse: it was
an extra broadcast from control out to all the peers in the network.

Now, skip the initial update if there are no stun results and we don't
have a DERP map.

More work remains optimizing start-up requests/map updates, but this
is a start.

Updates tailscale/corp#557
2020-10-14 11:01:19 -07:00
Brad Fitzpatrick
551e1e99e9 net/netns: don't bind to device for localhost connections
Fixes derphttp test failures on Windows (for #50).
2020-10-13 15:24:07 -07:00
Brad Fitzpatrick
746f03669c wgengine: fix lazy wireguard config bug when disco keys change
There was a bug with the lazy wireguard config code where, if the
minimum set of peers to tell wireguard didn't change, we skipped
calling userspaceEngine.updateActivityMapsLocked which updated
the various data structures that matched incoming traffic to later
reconfigure the minimum config.

That meant if an idle peer restarted and changed discovery keys, we
skipped updating our maps of disco keys/IPs that would caused us to
lazily inflate the config for that peer later if/when it did send
traffic.
2020-10-13 12:10:51 -07:00
Brad Fitzpatrick
2076a50862 wgengine/magicsock: finish a comment sentence that ended prematurely 2020-10-13 12:10:51 -07:00
Brad Fitzpatrick
371f1a9502 go.sum: add a missing entry that Go keeps adding 2020-10-13 12:10:51 -07:00
Alex Brainman
f2ce64f0c6 wgengine/router: unfork winipcfg-go package, use upstream
Use golang.zx2c4.com/wireguard/windows/tunnel/winipcfg
instead of github.com/tailscale/winipcfg-go package.

Updates #760

Signed-off-by: Alex Brainman <alex.brainman@gmail.com>
2020-10-13 09:21:22 -07:00
Brad Fitzpatrick
515866d7c6 ipn, ipnserver, cmd/tailscale: add "server mode" support on Windows
This partially (but not yet fully) migrates Windows to tailscaled's
StateStore storage system.

This adds a new bool Pref, ForceDaemon, defined as:

// ForceDaemon specifies whether a platform that normally
// operates in "client mode" (that is, requires an active user
// logged in with the GUI app running) should keep running after the
// GUI ends and/or the user logs out.
//
// The only current applicable platform is Windows. This
// forced Windows to go into "server mode" where Tailscale is
// running even with no users logged in. This might also be
// used for macOS in the future. This setting has no effect
// for Linux/etc, which always operate in daemon mode.

Then, when ForceDaemon becomes true, we now write use the StateStore
to track which user started it in server mode, and store their prefs
under that key.

The ipnserver validates the connections/identities and informs that
LocalBackend which userid is currently in charge.

The GUI can then enable/disable server mode at runtime, without using
the CLI.

But the "tailscale up" CLI was also fixed, so Windows users can use
authkeys or ACL tags, etc.

Updates #275
2020-10-12 14:28:21 -07:00
Josh Bleecher Snyder
d027cd81df tailcfg: restore Roles field to UserProfile 2020-10-09 15:56:39 -07:00
Brad Fitzpatrick
638127530b ipn/ipnserver: prevent use by multiple Windows users, add HTML status page
It was previously possible for two different Windows users to connect
to the IPN server at once, but it didn't really work. They mostly
stepped on each other's toes and caused chaos.

Now only one can control it, but it can be active for everybody else.

Necessary dependency step for Windows server/headless mode (#275)

While here, finish wiring up the HTTP status page on Windows, now that
all the dependent pieces are available.
2020-10-09 12:20:47 -07:00
Josh Bleecher Snyder
400e89367c tailcfg: restore Role field to MapResponse
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2020-10-09 12:07:32 -07:00
Brad Fitzpatrick
22c462bd91 wgengine/monitor: fix copy/paste-o to actually monitor route changes
Due to a copy/paste-o, we were monitoring address changes twice, and
not monitoring route changes at all.

Verified with 'tailscale debug --monitor' that this actually works now (while
running 'route add 10.3.0.0 mask 255.255.0.0 10.0.0.1' and 'route delete (same)'
back and forth in cmd.exe)

In practice route changes are accompanied by address changes and this
doesn't fix any known issues. I just noticed this while reading this
code again. But at least the code does what it was trying to do now.
2020-10-09 09:04:26 -07:00
Brad Fitzpatrick
63d65368db go.mod: bump wireguard-go for x/sys/unix symbol loss
Updates golang/go#41868
2020-10-08 09:47:58 -07:00
Avery Pennarun
6332bc5e08 controlclient: print http errors if result code != 200.
Turns out for the particular error I was chasing, it actually returns
200 and zero data. But this code mirrors the same check in the map
poll, and is the right thing to do in the name of future debugging.

Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
2020-10-08 01:01:47 -04:00
Avery Pennarun
0e5f2b90a5 echoRespondToAll: filter.Accept rather than filter.Drop on a match.
This function is only called in fake mode, which won't do anything more
with the packet after we respond to it anyway, so dropping it in the
prefilter is not necessary. And it's kinda semantically wrong: we did
not reject it, so telling the upper layer that it was rejected produces
an ugly error message.

Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
2020-10-08 01:01:43 -04:00
Avery Pennarun
5041800ac6 wgengine/tstun/faketun: it's a null tunnel, not a loopback.
At some point faketun got implemented as a loopback (put a packet in
from wireguard, the same packet goes back to wireguard) which is not
useful. It's supposed to be an interface that just sinks all packets,
and then wgengine adds *only* and ICMP Echo responder as a layer on
top.

This caused extremely odd bugs on darwin, where the special case that
reinjects packets from local->local was filling the loopback channel
and creating an infinite loop (which became jammed since the reader and
writer were in the same goroutine).

Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
2020-10-08 01:01:39 -04:00
Brad Fitzpatrick
3e4c46259d wgengine/magicsock: don't do netchecks either when network is down
A continuation of 6ee219a25d

Updates #640
2020-10-06 20:24:10 -07:00
Brad Fitzpatrick
6ee219a25d ipn, wgengine, magicsock, tsdns: be quieter and less aggressive when offline
If no interfaces are up, calm down and stop spamming so much. It was
noticed as especially bad on Windows, but probably was bad
everywhere. I just have the best network conditions testing on a
Windows VM.

Updates #604
2020-10-06 15:26:53 -07:00
David Crawshaw
7616acd118 tailcfg: add Clone method for RegisterResponse
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
2020-10-06 14:06:11 -04:00
David Crawshaw
15297a3a09 control/controlclient: some extra debug info in errors
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
2020-10-06 14:06:11 -04:00
Brad Fitzpatrick
587bdc4280 ipn, wgengine: disable subnet routes if network has PAC configuration
Not configurable yet.

Updates tailscale/corp#653

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-10-05 21:04:23 -07:00
Josh Bleecher Snyder
a5103a4cae all: upgrade to latest version of depaware 2020-10-02 20:35:13 -07:00
Josh Bleecher Snyder
585a0d8997 all: use testing.T.TempDir
Bit of Friday cleanup.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2020-10-02 20:31:31 -07:00
Brad Fitzpatrick
ed5d5f920f net/interfaces: add interfaces.State.String method 2020-10-02 12:15:05 -07:00
Josh Bleecher Snyder
9784cae23b util/uniq: add new package
This makes it easy to compact slices that contain duplicate elements
by sorting and then uniqing.

This is an alternative to constructing an intermediate map
and then extracting elements from it. It also provides
more control over equality than using a map key does.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2020-10-02 11:00:56 -07:00
Brad Fitzpatrick
12e28aa87d ipn: on transition from no PAC to PAC, reset state
So previous routes aren't shadowing resources that the operating
system might need (Windows Domain Controller, DNS server, corp HTTP
proxy, WinHTTP fetching the PAC file itself, etc).

This effectively detects when we're transitioning from, say, public
wifi to corp wifi and makes Tailscale remove all its routes and stops
its TCP connections and tries connecting to everything anew.

Updates tailscale/corp#653
2020-10-01 22:03:25 -07:00
Brad Fitzpatrick
cab3eb995f net/interfaces: quiet PAC detection logging in no-PAC case, add benchmark 2020-10-01 22:02:39 -07:00
Josh Bleecher Snyder
38dda1ea9e all: update depaware.txt
Broken by 8051ecff55.


Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2020-10-01 16:35:32 -07:00
Brad Fitzpatrick
8051ecff55 net/interfaces: add State.PAC field, populate it on Windows
Not used for anything yet (except logging), but populate the current
proxy autoconfig PAC URL in Interfaces.State.

A future change will do things based on it.
2020-10-01 15:33:37 -07:00
Brad Fitzpatrick
b5a3850d29 control/controlclient, ipn: store machine key separately from user prefs/persist
Updates #610 (fixes after some win/xcode changes in a separate repo)
2020-10-01 14:30:20 -07:00
Josh Bleecher Snyder
e1596d655a tstest: skip resource check when test has failed
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2020-10-01 11:27:22 -07:00
Josh Bleecher Snyder
ce6aca13f0 tailcfg: add yet another IsZero method
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2020-09-30 17:55:12 -07:00
Josh Bleecher Snyder
070dfa0c3d tailcfg: add more IsZero methods
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2020-09-30 17:47:07 -07:00
Josh Bleecher Snyder
efb08e4fee all: use IsZero methods
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2020-09-30 17:13:41 -07:00