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The easiest, most secure way to use WireGuard and 2FA.
b75921a7cb
Avoid taking Server.mu for repeated sends from a client to the same small set of local peers. Each sclient now keeps a bounded, goroutine-local LRU of destination public key to clientSet. To cap memory for idle clients, cache entries track a coarsely updated last-used time. The hot path refreshes that timestamp only when it is older than 30 seconds, and incoming ping frames trim entries idle for more than 10 minutes. This keeps cleanup on the client run goroutine without adding another mutex or background goroutine. cmd/derper gets new --peer-cache-max-entries and --peer-cache-max-idle flags. Their zero values use the automatic defaults, and --peer-cache-max-entries=-1 disables the cache. The peer_lookup_cache_misses counter tracks how often lookupDest falls back to the authoritative Server.mu lookup. We do not count hits on the hot path; when the cache is enabled, hits can be derived from packets_received minus peer_lookup_cache_misses. This optimization is pulled out of the larger #13510 DERP flow-tracking work from 2024, which did a bunch more. We can rebase that bigger PR later and discuss its stats and memory impact on its own merits without losing this standalone optimization. The benchmark compares the same code with TS_DEBUG_DERP_DISABLE_PEER_CACHE set true for the before run and the default cached path for the after run: TS_DEBUG_DERP_DISABLE_PEER_CACHE=true go test ./derp/derpserver -run '^$' -bench '^BenchmarkLookupDestPeerCache$' -benchtime=2s -count=10 > before go test ./derp/derpserver -run '^$' -bench '^BenchmarkLookupDestPeerCache$' -benchtime=2s -count=10 > after go run golang.org/x/perf/cmd/benchstat@latest before after goos: linux goarch: amd64 pkg: tailscale.com/derp/derpserver cpu: Intel(R) Xeon(R) 6975P-C │ before │ after │ │ sec/op │ sec/op vs base │ LookupDestPeerCache-16 180.400n ± 0% 5.720n ± 1% -96.83% (p=0.000 n=10) │ before │ after │ │ B/op │ B/op vs base │ LookupDestPeerCache-16 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ ¹ all samples are equal │ before │ after │ │ allocs/op │ allocs/op vs base │ LookupDestPeerCache-16 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ ¹ all samples are equal Updates #3560 Change-Id: Ie31b540447211fd9415eea6cc235b83a87930093 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> |
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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.