Mike O'DriscollandGitHub
6a709216b9
magicsock de-duplicates NetInfo callbacks against c.netInfoLast, a cache that lives on the long-lived magicsock.Conn. That cache survives a control client swap (interactive login or profile switch), where only the control client (and its own per-client NetInfo dedup) is replaced. As a result, the first netcheck after the swap produces a structurally-identical NetInfo (same PreferredDERP, same NAT shape), magicsock suppresses it as unchanged, and the new control session never learns our home DERP. Peers can't reach the node over DERP until some unrelated NetInfo field happens to change. Add Conn.ResetNetInfoLast to clear the dedup cache, and call it from LocalBackend.setControlClientLocked whenever a control client is installed, so the next netcheck re-reports the current NetInfo to the new client. netInfoLast is only a dedup/optimization cache (all readers nil-guard, and it is recomputed by every netcheck), so clearing it can only add a delivery, never lose or misroute one; it is scoped to control-client lifecycle events, not steady-state operation. Updates #17887 Fixes #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.