a89b2dddd1
Previously, any peer added or removed by an incremental netmap delta was only visible to wireguard-go after a full authReconfig: wgcfg's ReconfigDevice re-installed a PeerLookupFunc closing over a freshly built map of every peer's allowed IPs, doing O(n) work per change. Instead, install the wireguard-go device hooks once, backed by live state. Engine.SetPeerConfigFunc installs a single long-lived PeerLookupFunc that queries LocalBackend's per-node RouteManager on demand, and Engine.SyncDevicePeer does O(1) per-peer device sync (remove, or update allowed IPs) as each delta mutation is applied. Full reconfigs keep an O(n peers) device sync for now, but with no lookup closure to reinstall and no removed-peer resurrection race; a later change removes full-config peer syncing entirely. The RouteManager's PeerAllowedIPs accessor backs the new hooks: its sorted output makes unchanged state a no-op update, and its peer filtering mirrors nmcfg.WGCfg, so expired peers and peers predating both DERP and disco contribute no prefixes and thus cannot be lazily created in the device, which matters because wireguard-go validates inbound source IPs against per-peer allowed IPs. The engine's SetPeerByIPPacketFunc callback is now authoritative when installed, since LocalBackend's implementation covers subnet routes and exit-node routes via the RouteManager's outbound table; the engine's own reconfig-time BART table only serves engines running without a LocalBackend. The forced authReconfig on peer add/remove stays for now: the WireGuard device no longer needs it, but OS routes, the quad-100 resolver's MagicDNS hosts map, and tstun's masquerade/jailed peer config are still derived from the full peer set. Making those delta-aware is the next step before gating it. Updates #12542 Change-Id: I3ba8c7c324bca0ad0269279d03f53b1f17fb63a2 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.