In order to test the sticky last suggestion code, a test was written for
LocalBackend.SuggestExitNode but it contains a random number generator
which makes writing comprehensive tests very difficult. This doesn't
change how the last suggestion works, but it adds some infrastructure to
make that easier in a later PR.
This adds func parameters for the two randomized parts: breaking ties
between DERP regions and breaking ties between nodes. This way tests can
validate the entire list of tied options, rather than expecting a
particular outcome given a particular random seed.
As a result of this, the global random number generator can be used
rather than seeding a local one each time.
In order to see the tied nodes for the location based (i.e. Mullvad)
case, pickWeighted needed to return a slice instead of a single
arbitrary option, so there is a small change in how that works.
Updates tailscale/corp#19681
Change-Id: I83c48a752abdec0f59c58ccfd8bfb3f3f17d0ea8
Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>
stunstamp timestamping includes userspace and SO_TIMESTAMPING kernel
timestamping where available. Measurements are written locally to a
sqlite DB, exposed over an HTTP API, and written to prometheus
via remote-write protocol.
Updates tailscale/corp#20344
Signed-off-by: Jordan Whited <jordan@tailscale.com>
This mostly removes a lot of repetition by predefining some nodes and
other data structures, plus adds some helpers for creating Peer entries
in the netmap. Several existing test cases were reworked to ensure
better coverage of edge cases, and several new test cases were added to
handle some additional responsibility that is in (or will be shortly
moving in) suggestExitNode().
Updates tailscale/corp#19681
Change-Id: Ie14c2988d7fd482f7d6a877f78525f7788669b85
Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>
A non-signing node can be allowed to re-sign its new node keys following
key renewal/rotation (e.g. via `tailscale up --force-reauth`). To be
able to do this, node's TLK is written into WrappingPubkey field of the
initial SigDirect signature, signed by a signing node.
The intended use of this field implies that, for each WrappingPubkey, we
typically expect to have at most one active node with a signature
tracing back to that key. Multiple valid signatures referring to the
same WrappingPubkey can occur if a client's state has been cloned, but
it's something we explicitly discourage and don't support:
https://tailscale.com/s/clone
This change propagates rotation details (wrapping public key, a list
of previous node keys that have been rotated out) to netmap processing,
and adds tracking of obsolete node keys that, when found, will get
filtered out.
Updates tailscale/corp#19764
Signed-off-by: Anton Tolchanov <anton@tailscale.com>
This adds a new ListenPacket function on tsnet.Server
which acts mostly like `net.ListenPacket`.
Unlike `Server.Listen`, this requires listening on a
specific IP and does not automatically listen on both
V4 and V6 addresses of the Server when the IP is unspecified.
To test this, it also adds UDP support to tsdial.Dialer.UserDial
and plumbs it through the localapi. Then an associated test
to make sure the UDP functionality works from both sides.
Updates #12182
Signed-off-by: Maisem Ali <maisem@tailscale.com>
Alpine APK repos are versioned, and contain different package sets.
Older APK releases and repos don't have the latest tailscale package.
When we report "no update available", check whether pkgs.tailscale.com
has a newer tarball release. If it does, it's possible that the system
is on an older Alpine release. Print additional messages to suggest the
user to upgrade their OS.
Fixes#11309
Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
This fixes an issue where, on containerized environments an upgrade
1.66.3 -> 1.66.4 failed with default containerboot configuration.
This was because containerboot by default runs 'tailscale up'
that requires all previously set flags to be explicitly provided
on subsequent runs and we explicitly set --stateful-filtering
to true on 1.66.3, removed that settingon 1.66.4.
Updates tailscale/tailscale#12307
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
Co-authored-by: Andrew Lytvynov <awly@tailscale.com>
In https://github.com/tailscale/tailscale/pull/11363
I changed the subnet router manifest to run in tun
mode (for performance reasons), but did not
change the security context to give it net_admin,
which is required to for the tailscale socket.
Updates tailscale/tailscale#12083
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
The derp metrics got out of sync in 74eb99aed1 (2023-03).
They were fixed in 0380cbc90d (2024-05).
This adds some further guardrails (atop the previous fix) to make sure
they don't get out of sync again.
Updates #12288
Change-Id: I809061a81f8ff92f45054d0253bc13871fc71634
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This change makes our access log record more consistent with the
new log/tslog package formatting of "time". Note that we can
change slog itself to call "time" "when" but we're chosing
to make this breaking change to be consistent with the std lib's
defaults.
Updates tailscale/corp#17071
Signed-off-by: Marwan Sulaiman <marwan@tailscale.com>
- Add current node signature to `ipnstate.NetworkLockStatus`;
- Print current node signature in a human-friendly format as part
of `tailscale lock status`.
Examples:
```
$ tailscale lock status
Tailnet lock is ENABLED.
This node is accessible under tailnet lock. Node signature:
SigKind: direct
Pubkey: [OTB3a]
KeyID: tlpub:44a0e23cd53a4b8acc02f6732813d8f5ba8b35d02d48bf94c9f1724ebe31c943
WrappingPubkey: tlpub:44a0e23cd53a4b8acc02f6732813d8f5ba8b35d02d48bf94c9f1724ebe31c943
This node's tailnet-lock key: tlpub:44a0e23cd53a4b8acc02f6732813d8f5ba8b35d02d48bf94c9f1724ebe31c943
Trusted signing keys:
tlpub:44a0e23cd53a4b8acc02f6732813d8f5ba8b35d02d48bf94c9f1724ebe31c943 1 (self)
tlpub:6fa21d242a202b290de85926ba3893a6861888679a73bc3a43f49539d67c9764 1 (pre-auth key kq3NzejWoS11KTM59)
```
For a node created via a signed auth key:
```
This node is accessible under tailnet lock. Node signature:
SigKind: rotation
Pubkey: [e3nAO]
Nested:
SigKind: credential
KeyID: tlpub:6fa21d242a202b290de85926ba3893a6861888679a73bc3a43f49539d67c9764
WrappingPubkey: tlpub:3623b0412cab0029cb1918806435709b5947ae03554050f20caf66629f21220a
```
For a node that rotated its key a few times:
```
This node is accessible under tailnet lock. Node signature:
SigKind: rotation
Pubkey: [DOzL4]
Nested:
SigKind: rotation
Pubkey: [S/9yU]
Nested:
SigKind: rotation
Pubkey: [9E9v4]
Nested:
SigKind: direct
Pubkey: [3QHTJ]
KeyID: tlpub:44a0e23cd53a4b8acc02f6732813d8f5ba8b35d02d48bf94c9f1724ebe31c943
WrappingPubkey: tlpub:2faa280025d3aba0884615f710d8c50590b052c01a004c2b4c2c9434702ae9d0
```
Updates tailscale/corp#19764
Signed-off-by: Anton Tolchanov <anton@tailscale.com>
The `--wait` flag for `systemd-run` was added in systemd 232. While it
is quite old, it doesn't hurt to special-case them and skip the `--wait`
flag. The consequence is that we lose the update command output in logs,
but at least auto-updates will work.
Fixes#12136
Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
This busybox fwmaskWorks check was added before we moved away from
using the "ip" command to using netlink directly.
So it's now just wasted work (and log spam on Gokrazy) to check the
"ip" command capabilities if we're never going to use it.
Do it lazily instead.
Updates #12277
Change-Id: I8ab9acf64f9c0d8240ce068cb9ec8c0f6b1ecee7
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Updates https://github.com/tailscale/corp/issues/15802.
On iOS exclusively, this PR adds logic to use a split DNS configuration in more cases, with the goal of improving battery life. Acting as the global DNS resolver on iOS should be avoided, as it leads to frequent wakes of IPNExtension.
We try to determine if we can have Tailscale only handle DNS queries for resources inside the tailnet, that is, all routes in the DNS configuration do not require a custom resolver (this is the case for app connectors, for instance).
If so, we set all Routes as MatchDomains. This enables a split DNS configuration which will help preserve battery life. Effectively, for the average Tailscale user who only relies on MagicDNS to resolve *.ts.net domains, this means that Tailscale DNS will only be used for those domains.
This PR doesn't affect users with Override Local DNS enabled. For these users, there should be no difference and Tailscale will continue acting as a global DNS resolver.
Signed-off-by: Andrea Gottardo <andrea@tailscale.com>
This allows pam authentication to run for ssh sessions, triggering
automation like pam_mkhomedir.
Updates #11854
Signed-off-by: Percy Wegmann <percy@tailscale.com>
This can be used to implement a persistent pool (i.e. one that isn't
cleared like sync.Pool is) of items–e.g. database connections.
Some benchmarks vs. a naive implementation that uses a single map
iteration show a pretty meaningful improvement:
$ benchstat -col /impl ./bench.txt
goos: darwin
goarch: arm64
pkg: tailscale.com/util/pool
│ Pool │ map │
│ sec/op │ sec/op vs base │
Pool_AddDelete-10 10.56n ± 2% 15.11n ± 1% +42.97% (p=0.000 n=10)
Pool_TakeRandom-10 56.75n ± 4% 1899.50n ± 20% +3246.84% (p=0.000 n=10)
geomean 24.49n 169.4n +591.74%
Updates tailscale/corp#19900
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: Ie509cb65573c4726cfc3da9a97093e61c216ca18
We don't build a lot of tools with CGO, but we do build some, and it's
extremely valuable for production services in particular to have symbols
included - for perf and so on.
I tested various other builds that could be affected negatively, in
particular macOS/iOS, but those use split-dwarf already as part of their
build path, and Android which does not currently use gocross.
One binary which is normally 120mb only grew to 123mb, so the trade-off
is definitely worthwhile in context.
Updates tailscale/corp#20296
Signed-off-by: James Tucker <james@tailscale.com>
Palo Alto reported interpreting hairpin probes as LAND attacks, and the
firewalls may be responding to this by shutting down otherwise in use NAT sessions
prematurely. We don't currently make use of the outcome of the hairpin
probes, and they contribute to other user confusion with e.g. the
AirPort Extreme hairpin session workaround. We decided in response to
remove the whole probe feature as a result.
Updates #188
Updates tailscale/corp#19106
Updates tailscale/corp#19116
Signed-off-by: James Tucker <james@tailscale.com>
After some analysis, stateful filtering is only necessary in tailnets
that use `autogroup:danger-all` in `src` in ACLs. And in those cases
users explicitly specify that hosts outside of the tailnet should be
able to reach their nodes. To fix local DNS breakage in containers, we
disable stateful filtering by default.
Updates #12108
Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
This change updates the existing api.md TOC links to point at the new
publicapi folder/files. It also removes the body of the docs from the
file, to avoid the docs becoming out of sync.
This change also renames overview.md to readme.md.
Updates tailscale/corp#19526
Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>
It was requested by the first customer 4-5 years ago and only used
for a brief moment of time. We later added netmap visibility trimming
which removes the need for this.
It's been hidden by the CLI for quite some time and never documented
anywhere else.
This keeps the CLI flag, though, out of caution. It just returns an
error if it's set to anything but true (its default).
Fixes#12058
Change-Id: I7514ba572e7b82519b04ed603ff9f3bdbaecfda7
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Updates #12172 (then need to update other repos)
Change-Id: I439f65e0119b09e00da2ef5c7a4f002f93558578
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This change includes the device and user invites API docs in the
new publicapi documentation structure.
Updates tailscale/corp#19526
Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>
Palo Alto firewalls have a typically hard NAT, but also have a mode
called Persistent DIPP that is supposed to provide consistent port
mapping suitable for STUN resolution of public ports. Persistent DIPP
works initially on most Palo Alto firewalls, but some models/software
versions have a bug which this works around.
The bug symptom presents as follows:
- STUN sessions resolve a consistent public IP:port to start with
- Much later netchecks report the same IP:Port for a subset of
sessions, most often the users active DERP, and/or the port related
to sustained traffic.
- The broader set of DERPs in a full netcheck will now consistently
observe a new IP:Port.
- After this point of observation, new inbound connections will only
succeed to the new IP:Port observed, and existing/old sessions will
only work to the old binding.
In this patch we now advertise the lowest latency global endpoint
discovered as we always have, but in addition any global endpoints that
are observed more than once in a single netcheck report. This should
provide viable endpoints for potential connection establishment across
a NAT with this behavior.
Updates tailscale/corp#19106
Signed-off-by: James Tucker <james@tailscale.com>
This change creates a new folder called publicapi that will become the
future home to the Tailscale public API docs.
This change also splits the existing API docs (still located in api.md)
into separate files, for easier reading and contribution.
Updates tailscale/corp#19526
Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>
Fixestailscale/tailscale#10393Fixestailscale/corp#15412Fixestailscale/corp#19808
On Apple platforms, exit nodes and subnet routers have been unable to relay pings from Tailscale devices to non-Tailscale devices due to sandbox restrictions imposed on our network extensions by Apple. The sandbox prevented the code in netstack.go from spawning the `ping` process which we were using.
Replace that exec call with logic to send an ICMP echo request directly, which appears to work in userspace, and not trigger a sandbox violation in the syslog.
Signed-off-by: Andrea Gottardo <andrea@gottardo.me>
Tracking down the side effect can otherwise be a pain, for example on
Darwin an empty GOOS resulted in CGO being implicitly disabled. The user
intended for `export GOOS=` to act like unset, and while this is a
misunderstanding, the main toolchain would treat it this way.
Fixestailscale/corp#20059
Signed-off-by: James Tucker <james@tailscale.com>
