By polling RTM_GETSTATS via netlink. RTM_GETSTATS is a relatively
efficient and targeted (single device) polling method available since
Linux v4.7.
The tundevstats "feature" can be extended to other platforms in the
future, and it's trivial to add new rtnl_link_stats64 counters on
Linux.
Updates tailscale/corp#38181
Signed-off-by: Jordan Whited <jordan@tailscale.com>
Replace byte-at-a-time ReadByte loops with Peek+Discard in the DERP
read path. Peek returns a slice into bufio's internal buffer without
allocating, and Discard advances the read pointer without copying.
Introduce util/bufiox with a BufferedReader interface and ReadFull
helper that uses Peek+copy+Discard as an allocation-free alternative
to io.ReadFull.
- derp.ReadFrameHeader: replace 5× ReadByte with Peek(5)+Discard(5),
reading the frame type and length directly from the peeked slice.
Remove now-unused readUint32 helper.
name old ns/op new ns/op speedup
ReadFrameHeader-8 24.2 12.4 ~2x
(0 allocs/op in both)
- key.NodePublic.ReadRawWithoutAllocating: replace 32× ReadByte with
bufiox.ReadFull. Addresses the "Dear future" comment about switching
away from byte-at-a-time reads once a non-escaping alternative exists.
name old ns/op new ns/op speedup
NodeReadRawWithoutAllocating-8 140 43.6 ~3.2x
(0 allocs/op in both)
- derpserver.handleFramePing: replace io.ReadFull with bufiox.ReadFull.
Updates tailscale/corp#38509
Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
When a client starts up without being able to connect to control, it
sends its discoKey to other nodes it wants to communicate with over
TSMP. This disco key will be a newer key than the one control knows
about.
If the client that can connect to control gets a full netmap, ensure
that the disco key for the node not connected to control is not
overwritten with the stale key control knows about.
This is implemented through keeping track of mapSession and use that for
the discokey injection if it is available. This ensures that we are not
constantly resetting the wireguard connection when getting the wrong
keys from control.
This is implemented as:
- If the key is received via TSMP:
- Set lastSeen for the peer to now()
- Set online for the peer to false
- When processing new keys, only accept keys where either:
- Peer is online
- lastSeen is newer than existing last seen
If mapSession is not available, as in we are not yet connected to
control, punt down the disco key injection to magicsock.
Ideally, we will want to have mapSession be long lived at some point in
the near future so we only need to inject keys in one location and then
also use that for testing and loading the cache, but that is a yak for
another PR.
Updates #12639
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Currently IP forwarding health check is done on sending MapRequests.
Move ip forwarding to the health service to gain the benefits
of the health tracker and perodic monitoring out of band from
the MapRequest path. ipnlocal now provides a closure to
the health service to provide the check if forwarding is broken.
Removed `skipIPForwardingCheck` from controlclient/direct.go,
it wasn't being used as the comments describe it, that check
has moved to ipnlocal for the closure to the health tracker.
Updates #18976
Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
Introduce a datapathHandler that implements hooks that will
receive packets from the tstun.Wrapper. This commit does not wire
those up just yet.
Perform DNAT from Magic IP to Transit IP on outbound flows on clients,
and reverse SNAT in the reverse direction.
Perform DNAT from Transit IP to final destination IP on outbound flows
on connectors, and reverse SNAT in the reverse direction.
Introduce FlowTable to cache validated flows by 5-tuple for fast lookups
after the first packet.
Flow expiration is not covered, and is intended as future work before
the feature is officially released.
Fixestailscale/corp#34249Fixestailscale/corp#35995
Co-authored-by: Fran Bull <fran@tailscale.com>
Signed-off-by: Michael Ben-Ami <mzb@tailscale.com>
This makes tsnet apps not depend on x/crypto/ssh and locks that in with a test.
It also paves the wave for tsnet apps to opt-in to SSH support via a
blank feature import in the future.
Updates #12614
Change-Id: Ica85628f89c8f015413b074f5001b82b27c953a9
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
After we intercept a DNS response and assign magic and transit addresses
we must communicate the assignment to our connector so that it can
direct traffic when it arrives.
Use the recently added peerapi endpoint to send the addresses.
Updates tailscale/corp#34258
Signed-off-by: Fran Bull <fran@tailscale.com>
This commit adds `--json` output mode to dns debug commands.
It defines structs for the data that is returned from:
`tailscale dns status` and `tailscale dns query <DOMAIN>` and
populates that as it runs the diagnostics.
When all the information is collected, it is serialised to JSON
or string built into an output and returned to the user.
The structs are defined and exported to golang consumers of this command
can use them for unmarshalling.
Updates #13326
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
PR #18860 adds firewall rules in the mangle table to save outbound packet
marks to conntrack and restore them on reply packets before the routing
decision. When reply packets have their marks restored, the kernel uses
the correct routing table (based on the mark) and the packets pass the
rp_filter check.
This makes the risk check and reverse path filtering warnings unnecessary.
Updates #3310Fixestailscale/corp#37846
Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
Using the new wait command from #18574 provide a tailscale-online.target
that has a similar usage model to the conventional
`network-online.target`.
Updates #3340
Updates #11504
Signed-off-by: James Tucker <james@tailscale.com>
The new version of app connector (conn25) needs to read DNS responses
for domains it is interested in and store and swap out IP addresses.
Add a hook to dns manager to enable this.
Give the conn25 updated netmaps so that it knows when to assign
connecting addresses and from what pool.
Assign an address when we see a DNS response for a domain we are
interested in, but don't do anything with the address yet.
Updates tailscale/corp#34252
Signed-off-by: Fran Bull <fran@tailscale.com>
This commit is based on ff0978ab, and extends #18497 to connect network map
caching to the LocalBackend. As implemented, only "whole" netmap values are
stored, and we do not yet handle incremental updates. As-written, the feature must
be explicitly enabled via the TS_USE_CACHED_NETMAP envknob, and must be
considered experimental.
Updates #12639
Co-Authored-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Change-Id: I48a1e92facfbf7fb3a8e67cff7f2c9ab4ed62c83
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
bart has gained a bunch of purported performance and usability
improvements since the current version we are using (0.18.0,
from 1y ago)
Updates tailscale/corp#36982
Signed-off-by: Amal Bansode <amal@tailscale.com>
This updates the URL shown by systemd to the new URL used by the docs
after the recent migration.
Fixes#18646
Signed-off-by: Tim Walters <tim@tailscale.com>
Add new "webbrowser" and "colorable" feature tags so that the
github.com/toqueteos/webbrowser and mattn/go-colorable packages
can be excluded from minbox builds.
Updates #12614
Change-Id: Iabd38b242f5a56aa10ef2050113785283f4e1fe8
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Package feature/conn25 is excludeable from a build via the featuretag.
Test it is excluded for minimal builds.
Updates #12614
Signed-off-by: Fran Bull <fran@tailscale.com>
We already had a featuretag for clientupdate, but the CLI wasn't using
it, making the "minbox" build (minimal combined tailscaled + CLI
build) larger than necessary.
Updates #12614
Change-Id: Idd7546c67dece7078f25b8f2ae9886f58d599002
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Running a command like `tailscale up --auth-key tskey-foo --auth-key tskey-bar` used to print
```
invalid value "tskey-bar" for flag -auth-key: flag provided multiple times
```
but now we print
```
invalid value "tskey-REDACTED" for flag -auth-key: flag provided multiple times
```
Fixes#18562
Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
This allows fetching auth keys, OAuth client secrets, and ID tokens (for
workload identity federation) from AWS Parameter Store by passing an ARN
as the value. This is a relatively low-overhead mechanism for fetching
these values from an external secret store without needing to run a
secret service.
Usage examples:
# Auth key
tailscale up \
--auth-key=arn:aws:ssm:us-east-1:123456789012:parameter/tailscale/auth-key
# OAuth client secret
tailscale up \
--client-secret=arn:aws:ssm:us-east-1:123456789012:parameter/tailscale/oauth-secret \
--advertise-tags=tag:server
# ID token (for workload identity federation)
tailscale up \
--client-id=my-client \
--id-token=arn:aws:ssm:us-east-1:123456789012:parameter/tailscale/id-token \
--advertise-tags=tag:server
Updates tailscale/corp#28792
Signed-off-by: Andrew Dunham <andrew@tailscale.com>
This file was never truly necessary and has never actually been used in
the history of Tailscale's open source releases.
A Brief History of AUTHORS files
---
The AUTHORS file was a pattern developed at Google, originally for
Chromium, then adopted by Go and a bunch of other projects. The problem
was that Chromium originally had a copyright line only recognizing
Google as the copyright holder. Because Google (and most open source
projects) do not require copyright assignemnt for contributions, each
contributor maintains their copyright. Some large corporate contributors
then tried to add their own name to the copyright line in the LICENSE
file or in file headers. This quickly becomes unwieldy, and puts a
tremendous burden on anyone building on top of Chromium, since the
license requires that they keep all copyright lines intact.
The compromise was to create an AUTHORS file that would list all of the
copyright holders. The LICENSE file and source file headers would then
include that list by reference, listing the copyright holder as "The
Chromium Authors".
This also become cumbersome to simply keep the file up to date with a
high rate of new contributors. Plus it's not always obvious who the
copyright holder is. Sometimes it is the individual making the
contribution, but many times it may be their employer. There is no way
for the proejct maintainer to know.
Eventually, Google changed their policy to no longer recommend trying to
keep the AUTHORS file up to date proactively, and instead to only add to
it when requested: https://opensource.google/docs/releasing/authors.
They are also clear that:
> Adding contributors to the AUTHORS file is entirely within the
> project's discretion and has no implications for copyright ownership.
It was primarily added to appease a small number of large contributors
that insisted that they be recognized as copyright holders (which was
entirely their right to do). But it's not truly necessary, and not even
the most accurate way of identifying contributors and/or copyright
holders.
In practice, we've never added anyone to our AUTHORS file. It only lists
Tailscale, so it's not really serving any purpose. It also causes
confusion because Tailscalars put the "Tailscale Inc & AUTHORS" header
in other open source repos which don't actually have an AUTHORS file, so
it's ambiguous what that means.
Instead, we just acknowledge that the contributors to Tailscale (whoever
they are) are copyright holders for their individual contributions. We
also have the benefit of using the DCO (developercertificate.org) which
provides some additional certification of their right to make the
contribution.
The source file changes were purely mechanical with:
git ls-files | xargs sed -i -e 's/\(Tailscale Inc &\) AUTHORS/\1 contributors/g'
Updates #cleanup
Change-Id: Ia101a4a3005adb9118051b3416f5a64a4a45987d
Signed-off-by: Will Norris <will@tailscale.com>
Polls IMDS (currently only AWS) for extra IPs to advertise as udprelay.
Updates #17796
Change-Id: Iaaa899ef4575dc23b09a5b713ce6693f6a6a6964
Signed-off-by: Alex Valiushko <alexvaliushko@tailscale.com>
fixestailscale/tailscale#18418
Both Serve and PeerAPI broke when we moved the TailscaleInterfaceName
into State, which is updated asynchronously and may not be
available when we configure the listeners.
This extracts the explicit interface name property from netmon.State
and adds as a static struct with getters that have proper error
handling.
The bug is only found in sandboxed Darwin clients, where we
need to know the Tailscale interface details in order to set up the
listeners correctly (they must bind to our interface explicitly to escape
the network sandboxing that is applied by NECP).
Currently set only sandboxed macOS and Plan9 set this but it will
also be useful on Windows to simplify interface filtering in netns.
Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>
QR codes are used by `tailscale up --qr` to provide an easy way to
open a web-page without transcribing a difficult URI. However, there’s
no need for this feature if the client will never be called
interactively. So this PR adds the `ts_omit_qrcodes` build tag.
Updates #18182
Signed-off-by: Simon Law <sfllaw@tailscale.com>
Raw Linux consoles support UTF-8, but we cannot assume that all UTF-8
characters are available. The default Fixed and Terminus fonts don’t
contain half-block characters (`▀` and `▄`), but do contain the
full-block character (`█`).
Sometimes, Linux doesn’t have a framebuffer, so it falls back to VGA.
When this happens, the full-block character could be anywhere in
extended ASCII block, because we don’t know which code page is active.
This PR introduces `--qr-format=auto` which tries to heuristically
detect when Tailscale is printing to a raw Linux console, whether
UTF-8 is enabled, and which block characters have been mapped in the
console font.
If Unicode characters are unavailable, the new `--qr-format=ascii`
formatter uses `#` characters instead of full-block characters.
Fixes#12935
Signed-off-by: Simon Law <sfllaw@tailscale.com>
Moves magicksock.cloudInfo into util/cloudinfo with minimal changes.
Updates #17796
Change-Id: I83f32473b9180074d5cdbf00fa31e5b3f579f189
Signed-off-by: Alex Valiushko <alexvaliushko@tailscale.com>
Ensure that hardware attestation keys are not added to tailscaled
state stores that are Kubernetes Secrets or AWS SSM as those Tailscale
devices should be able to be recreated on different nodes, for example,
when moving Pods between nodes.
Updates tailscale/tailscale#18302
Signed-off-by: Irbe Krumina <irbekrm@gmail.com>
TPM-based features have been incredibly painful due to the heterogeneous
devices in the wild, and many situations in which the TPM "changes" (is
reset or replaced). All of this leads to a lot of customer issues.
We hoped to iron out all the kinks and get all users to benefit from
state encryption and hardware attestation without manually opting in,
but the long tail of kinks is just too long.
This change disables TPM-based features on Windows and Linux by default.
Node state should get auto-decrypted on update, and old attestation keys
will be removed.
There's also tailscaled-on-macOS, but it won't have a TPM or Keychain
bindings anyway.
Updates #18302
Updates #15830
Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
updates tailscale/corp#33891
Addresses several older the TODO's in netmon. This removes the
Major flag precomputes the ChangeDelta state, rather than making
consumers of ChangeDeltas sort that out themselves. We're also seeing
a lot of ChangeDelta's being flagged as "Major" when they are
not interesting, triggering rebinds in wgengine that are not needed. This
cleans that up and adds a host of additional tests.
The dependencies are cleaned, notably removing dependency on netmon
itself for calculating what is interesting, and what is not. This includes letting
individual platforms set a bespoke global "IsInterestingInterface"
function. This is only used on Darwin.
RebindRequired now roughly follows how "Major" was historically
calculated but includes some additional checks for various
uninteresting events such as changes in interface addresses that
shouldn't trigger a rebind. This significantly reduces thrashing (by
roughly half on Darwin clients which switching between nics). The individual
values that we roll into RebindRequired are also exposed so that
components consuming netmap.ChangeDelta can ask more
targeted questions.
Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>
When using the resolve.conf file for setting DNS, it is possible that
some other services will trample the file and overwrite our set DNS
server. Experiments has shown this to be a racy error depending on how
quickly processes start.
Make an attempt to trample back the file a limited number of times if
the file is changed.
Updates #16635
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
When peers request an IP address mapping to be stored, the connector
stores it in memory.
Fixestailscale/corp#34251
Signed-off-by: Fran Bull <fran@tailscale.com>
Based on PR #16700 by @lox, adapted to current codebase.
Adds support for proxying HTTP requests to Unix domain sockets via
tailscale serve unix:/path/to/socket, enabling exposure of services
like Docker, containerd, PHP-FPM over Tailscale without TCP bridging.
The implementation includes reasonable protections against exposure of
tailscaled's own socket.
Adaptations from original PR:
- Use net.Dialer.DialContext instead of net.Dial for context propagation
- Use http.Transport with Protocols API (current h2c approach, not http2.Transport)
- Resolve conflicts with hasScheme variable in ExpandProxyTargetValue
Updates #9771
Signed-off-by: Peter A. <ink.splatters@pm.me>
Co-authored-by: Lachlan Donald <lachlan@ljd.cc>
Adds cmd/cigocacher as the client to cigocached for Go caching over
HTTP. The HTTP cache is best-effort only, and builds will fall back to
disk-only cache if it's not available, much like regular builds.
Not yet used in CI; that will follow in another PR once we have runners
available in this repo with the right network setup for reaching
cigocached.
Updates tailscale/corp#10808
Change-Id: I13ae1a12450eb2a05bd9843f358474243989e967
Signed-off-by: Tom Proctor <tomhjp@users.noreply.github.com>
With the introduction of node sealing, store.New fails in some cases due
to the TPM device being reset or unavailable. Currently it results in
tailscaled crashing at startup, which is not obvious to the user until
they check the logs.
Instead of crashing tailscaled at startup, start with an in-memory store
with a health warning about state initialization and a link to (future)
docs on what to do. When this health message is set, also block any
login attempts to avoid masking the problem with an ephemeral node
registration.
Updates #15830
Updates #17654
Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
This adds the --proxy-protocol flag to 'tailscale serve' and
'tailscale funnel', which tells the Tailscale client to prepend a PROXY
protocol[1] header when making connections to the proxied-to backend.
I've verified that this works with our existing funnel servers without
additional work, since they pass along source address information via
PeerAPI already.
Updates #7747
[1]: https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt
Change-Id: I647c24d319375c1b33e995555a541b7615d2d203
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
In #17639 we moved the subscription into NewLogger to ensure we would not race
subscribing with shutdown of the eventbus client. Doing so fixed that problem,
but exposed another: As we were only servicing events occasionally when waiting
for the network to come up, we could leave the eventbus to stall in cases where
a number of network deltas arrived later and weren't processed.
To address that, let's separate the concerns: As before, we'll Subscribe early
to avoid conflicts with shutdown; but instead of using the subscriber directly
to determine readiness, we'll keep track of the last-known network state in a
selectable condition that the subscriber updates for us. When we want to wait,
we'll wait on that condition (or until our context ends), ensuring all the
events get processed in a timely manner.
Updates #17638
Updates #15160
Change-Id: I28339a372be4ab24be46e2834a218874c33a0d2d
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
This compares the warnings we actually care about and skips the unstable
warnings and the changes with no warnings.
Fixes#17635
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Add new arguments to `tailscale up` so authkeys can be generated dynamically via identity federation.
Updates #9192
Signed-off-by: mcoulombe <max@tailscale.com>
Merge the connstats package into the netlog package
and unexport all of its declarations.
Remove the buildfeatures.HasConnStats and use HasNetLog instead.
Updates tailscale/corp#33352
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
The connstats package was an unnecessary layer of indirection.
It was seperated out of wgengine/netlog so that net/tstun and
wgengine/magicsock wouldn't need a depenedency on the concrete
implementation of network flow logging.
Instead, we simply register a callback for counting connections.
This PR does the bare minimum work to prepare tstun and magicsock
to only care about that callback.
A future PR will delete connstats and merge it into netlog.
Updates tailscale/corp#33352
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
Extend Persist with AttestationKey to record a hardware-backed
attestation key for the node's identity.
Add a flag to tailscaled to allow users to control the use of
hardware-backed keys to bind node identity to individual machines.
Updates tailscale/corp#31269
Change-Id: Idcf40d730a448d85f07f1bebf387f086d4c58be3
Signed-off-by: Patrick O'Doherty <patrick@tailscale.com>
