732bde6e86
Add a vmtest that guards the fix in #20025: after an in-process control client swap (profile switch / interactive re-login), magicsock's NetInfo dedup cache (netInfoLast) must be cleared so the structurally-identical post-switch NetInfo (same PreferredDERP, same NAT shape) is re-reported to the new control session rather than suppressed as unchanged. The test brings a node up, pins its home DERP so the reported NetInfo is identical across the switch, records the home DERP the test control learned, switches to a fresh login profile on the same control/network/NAT/DERP, and asserts the control re-learns the same non-zero home DERP for the node's new identity. Without ResetNetInfoLast the assertion times out at HomeDERP=0. To support this, vnet now serves the test control on port 443 (TLS) in addition to port 80: an immediate re-login makes a fresh noise dial, and because the prior dial was recent the control client forces an HTTPS (443) dial (controlhttp.Dialer.forceNoise443), which the harness previously did not answer. The control endpoint gets its own self-signed cert (the existing selfSignedDERPCert helper, renamed to the generic selfSignedCert); the cert is not validated since control noise dials authenticate via the Noise handshake, so it only needs a TLS peer to complete the forced 443 dial. Add Env.ForcePreferredDERP and Env.Relogin helpers for the above. Updates #20024 Signed-off-by: Mike O'Driscoll <mikeo@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.