55751c3d6d
Add a sync.Map cache on the Server that tracks destination keys not connected to this server. When a packet arrives for a cached absent destination, the payload is discarded via bufio.Reader.Discard without allocating a buffer, taking the server mutex, or looking up the client map. Cache entries expire after a configurable TTL (10s) and are invalidated in registerClient when a peer connects. Move the cache check into recvPacket so handleFrameSendPacket does not need to duplicate the frame validation and key reading logic. When the cache is hit, recvPacket returns nil contents and the caller returns early. Increase peerGoneLim from 3/sec to 50/sec per client. The not-here cache now provides per-destination rate limiting, so the per-client limiter serves only as a safety backstop against clients sending to many unique absent destinations. ``` name old ns/op new ns/op delta HandleFrameSendPacketAbsent/same_key 570 131 -77% HandleFrameSendPacketAbsent/unique_keys 559 145 -74% (0 B/op, 0 allocs/op on cache hits; was 280 B/op, 8 allocs/op) ``` Updates #38509
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 1.25. (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.