60ad6a4c9b
Add a debug facility that reports, per peer, the active dataplane endpoint state as seen by both magicsock and wireguard-go: magicsock's bestAddr (including relay VNI), whether it is currently trusted, the DERP fallback addr/home region, last send/recv (any and WireGuard-only) activity, full-ping time, WireGuard-only/expired flags, and peer map epAddr counts; plus whether a (lazily-created) wireguard-go peer currently exists, the endpoint it currently holds (string form plus a classification by concrete type: magicsock-managed vs other), and last handshake time and rx/tx byte counters. wireguard-go can end up holding a stale magicsock lazy endpoint as a peer's TX endpoint, silently black-holing traffic (#20082). Debugging that class of issue previously required manual log spelunking. This surfaces the relevant state via a LocalAPI debug endpoint (debug-active-endpoints), a c2n endpoint (/debug/active-endpoints), and a CLI command (tailscale debug active-endpoints), so both humans and tests can assert a client is in the expected dataplane state. The wireguard-go side is read via device.LookupActivePeer and wgint (which gains a mutex-guarded accessor for the peer's current conn.Endpoint, layout-checked like its existing stats accessors) rather than the UAPI text protocol, which we deliberately moved off of. Endpoint classification is a type assertion via a new magicsock.IsMagicsockEndpoint helper instead of string comparison. Updates #20082 Change-Id: Id39cf6fa8255584d0316b44e0a18bf26dc2769a5 Signed-off-by: James Tucker <james@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.