815bb291c9
If a user passes --advertise-tags=foo,bar (with no colons in any
segment), automatically prepend "tag:" client-side so it goes on the
wire as "tag:foo,tag:bar". Segments that already contain a colon are
left untouched and must be fully-qualified ("tag:foo"), which keeps
the door open for future colon-bearing syntax.
This was originally added in cd07437ad (2020-10-28) and then reverted
in 1be01ddc6 (2020-11-10) over forward-compatibility concerns. But
then it was realized in 2026-04-29 that this was always safe for
future extensiblity anyway (tags can't contain colons-- tag:foo:bar is
invalid anyway, per the 2020 CheckTag restrictions). So if we wanted
to perhaps some hypothetical --advertise-tags=tagset:setfoo or "group:foo",
we'd still have syntax to do, as it can't conflict with tag:group:foo.
Avery signed off on this on Slack: "Ok, I withdraw my objection to
auto-qualifying tag names in advertise-tags and I hope I won't regret
it :)"
Updates #861
Change-Id: I06935b0d3ae909894c95c9c2e185b7d6a219ff32
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Tailscale
Private WireGuard® networks made easy
Overview
This repository contains the majority of Tailscale's open source code.
Notably, it includes the tailscaled daemon and
the tailscale CLI tool. The tailscaled daemon runs on Linux, Windows,
macOS, and to varying degrees
on FreeBSD and OpenBSD. The Tailscale iOS and Android apps use this repo's
code, but this repo doesn't contain the mobile GUI code.
Other Tailscale repos of note:
- the Android app is at https://github.com/tailscale/tailscale-android
- the Synology package is at https://github.com/tailscale/tailscale-synology
- the QNAP package is at https://github.com/tailscale/tailscale-qpkg
- the Chocolatey packaging is at https://github.com/tailscale/tailscale-chocolatey
For background on which parts of Tailscale are open source and why, see https://tailscale.com/opensource/.
Using
We serve packages for a variety of distros and platforms at https://pkgs.tailscale.com.
Other clients
The macOS, iOS, and Windows clients use the code in this repository but additionally include small GUI wrappers. The GUI wrappers on non-open source platforms are themselves not open source.
Building
We always require the latest Go release, currently Go 1.26. (While we build releases with our Go fork, its use is not required.)
go install tailscale.com/cmd/tailscale{,d}
If you're packaging Tailscale for distribution, use build_dist.sh
instead, to burn commit IDs and version info into the binaries:
./build_dist.sh tailscale.com/cmd/tailscale
./build_dist.sh tailscale.com/cmd/tailscaled
If your distro has conventions that preclude the use of
build_dist.sh, please do the equivalent of what it does in your
distro's way, so that bug reports contain useful version information.
Bugs
Please file any issues about this code or the hosted service on the issue tracker.
Contributing
PRs welcome! But please file bugs. Commit messages should reference bugs.
We require Developer Certificate of
Origin
Signed-off-by lines in commits.
See commit-messages.md (or skim git log) for our commit message style.
About Us
Tailscale is primarily developed by the people at https://github.com/orgs/tailscale/people. For other contributors, see:
- https://github.com/tailscale/tailscale/graphs/contributors
- https://github.com/tailscale/tailscale-android/graphs/contributors
Legal
WireGuard is a registered trademark of Jason A. Donenfeld.