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Brad Fitzpatrick 910462a8e0 derp: unify server's clientSet interface into concrete type `73280595a8` for #2751 added a "clientSet" interface to distinguish the two cases of a client being singly connected (the common case) vs tolerating multiple connections from the client at once. At the time (three years ago) it was kinda an experiment and we didn't know whether it'd stop the reconnect floods we saw from certain clients. It did. So this promotes it to a be first-class thing a bit, removing the interface. The old tests from `73280595a` were invaluable in ensuring correctness while writing this change (they failed a bunch). But the real motivation for this change is that it'll permit a future optimization to add flow tracking for stats & performance where we don't contend on Server.mu for each packet sent via DERP. Instead, each client can track its active flows and hold on to a *clientSet and ask the clientSet per packet what the active client is via one atomic load rather than a mutex. And if the atomic load returns nil, we'll know we need to ask the server to see if they died and reconnected and got a new clientSet. But that's all coming later. Updates #3560 Change-Id: I9ccda3e5381226563b5ec171ceeacf5c210e1faf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>		2 months ago
.bencher	bencher: add config to suppress failures on benchmark regressions.	3 years ago
.github	.github: enable fuzz testing again (go1.23)	2 months ago
appc	appc: track metrics for route info storing	4 months ago
atomicfile	various: add golangci-lint, fix issues (#7905 )	2 years ago
chirp	all: update copyright and license headers	2 years ago
client	build(deps): bump ws from 8.14.2 to 8.17.1 in /client/web (#12524 )	2 months ago
clientupdate	clientupdate: return true for CanAutoUpdate for macsys (#12746 )	5 months ago
cmd	cmd/k8s-operator,k8s-operator,kube: Add TSRecorder CRD + controller (#13299 )	2 months ago
control	all: use new Go 1.23 slices.Sorted more	3 months ago
derp	derp: unify server's clientSet interface into concrete type	2 months ago
disco	disco: correct noun for nacl box type in disco docs	11 months ago
docs	docs/k8s: fix subnet router manifests (#12305 )	6 months ago
doctor	net/{interfaces,netmon}, all: merge net/interfaces package into net/netmon	7 months ago
drive	drive/driveimpl: use su instead of sudo	3 months ago
envknob	kube,cmd/{k8s-operator,containerboot},envknob,ipn/store/kubestore,*/depaware.txt: rename packages (#13418 )	2 months ago
gokrazy	gokrazy{,/natlabapp.arm64}: start adding arm64 appliance support	3 months ago
health	health: fix magicsockReceiveFuncWarnable health clearing	3 months ago
hostinfo	hostinfo: add hostinfo.IsNATLabGuestVM	3 months ago
internal	all: add test for package comments, fix, add comments as needed	4 months ago
ipn	ipnlocal,proxymap,wgengine/netstack: add optional WhoIs/proxymap debug	2 months ago
jsondb	all: update copyright and license headers	2 years ago
k8s-operator	cmd/k8s-operator,k8s-operator,kube: Add TSRecorder CRD + controller (#13299 )	2 months ago
kube	cmd/k8s-operator,k8s-operator,kube: Add TSRecorder CRD + controller (#13299 )	2 months ago
licenses	licenses: update license notices	3 months ago
log	log/sockstatlog: don't block for more than 5s on shutdown	4 months ago
logpolicy	logpolicy: extend the gokrazy/natlab wait-for-network delay for IPv6	3 months ago
logtail	logtail: close idle HTTP connections on shutdown	4 months ago
metrics	usermetric: add initial user-facing metrics	3 months ago
net	net/dns: disable DNS registration for Tailscale interface on Windows	3 months ago
omit	cmd/tailscaled, ipn/conffile: support ec2 user-data config file	6 months ago
packages/deb	go.mod: upgrade nfpm to v2 (#8786 )	1 year ago
paths	all: use Go 1.22 range-over-int	7 months ago
portlist	all: use Go 1.22 range-over-int	7 months ago
posture	control/controlclient,posture,util/syspolicy: use predefined syspolicy keys instead of string literals	3 months ago
prober	prober: make status page more clear	4 months ago
proxymap	ipnlocal,proxymap,wgengine/netstack: add optional WhoIs/proxymap debug	2 months ago
publicapi	publicapi: add note that API docs have moved to existing docs files (#12770 )	4 months ago
release	release/dist/qnap: omit .qpkg.codesigning files	7 months ago
safesocket	all: fix new lint warnings from bumping staticcheck	3 months ago
safeweb	safeweb: add Server.Close method (#13160 )	3 months ago
scripts	scripts: don't refresh the pacman repository on Arch (#12194 )	5 months ago
sessionrecording	sessionrecording,ssh/tailssh,k8s-operator: log connected recorder address (#13382 )	3 months ago
smallzstd	all: use Go 1.22 range-over-int	7 months ago
ssh/tailssh	ssh/tailssh: add ability to force V2 behavior using new feature flag	3 months ago
syncs	syncs: add Map.WithLock to allow mutations to the underlying map (#8101 )	4 months ago
tailcfg	tailcfg: bump capver for earlier cryptokey panic fix [capver 106]	3 months ago
taildrop	all: use new AppendEncode methods available in Go 1.22 (#11079 )	10 months ago
tempfork	cmd/tailscale: add shell tab-completion	7 months ago
tka	tka: truncate long rotation signature chains	3 months ago
tool	{tool,client}: bump node version (#12840 )	4 months ago
tsconst	cmd/tailscale/cli: support passing network lock keys via files	3 months ago
tsd	health, all: remove health.Global, finish plumbing health.Tracker	7 months ago
tsnet	tsnet: remove old package doc experimental warning	2 months ago
tstest	net/dns: fix IsZero and Equal methods on OSConfig	3 months ago
tstime	all: use math/rand/v2 more	6 months ago
tsweb	usermetric: add initial user-facing metrics	3 months ago
types	types/opt: add BoolFlag for setting Bool value as a flag	3 months ago
util	util/linuxfw: fall back to nftables when iptables not found	2 months ago
version	version/mkversion: allow env config of oss git cache dir	5 months ago
wf	all: add test for package comments, fix, add comments as needed	4 months ago
wgengine	ipnlocal,proxymap,wgengine/netstack: add optional WhoIs/proxymap debug	2 months ago
words	words: raccoon dog, dog with the raccoon in 'im	4 months ago
.gitattributes	.: add .gitattributes entry to use Go hunk-header driver	3 years ago
.gitignore	tstest/tailmac: add customized macOS virtualization tooling (#13146 )	3 months ago
.golangci.yml	ci: run 'go vet' in golangci-lint; fix errors in tests	12 months ago
ALPINE.txt	ALPINE.txt,Dockerfile{.base},build_docker.sh: bump alpine (#10543 )	12 months ago
AUTHORS	Move Linux client & common packages into a public repo.	5 years ago
CODEOWNERS	CODEOWNERS: add the start of an owners file	1 year ago
CODE_OF_CONDUCT.md	Add a code of conduct.	5 years ago
Dockerfile	all: switch to and require Go 1.23	3 months ago
Dockerfile.base	ALPINE.txt,Dockerfile{.base},build_docker.sh: bump alpine (#10543 )	12 months ago
LICENSE	all: update tools that manage copyright headers	2 years ago
Makefile	ssh/tailssh: fix SSH on busybox systems	3 months ago
PATENTS	Move Linux client & common packages into a public repo.	5 years ago
README.md	all: switch to and require Go 1.23	3 months ago
SECURITY.md	Add a SECURITY.md for vulnerability reports.	5 years ago
VERSION.txt	VERSION.txt: this is v1.73.0 (#13181 )	3 months ago
api.md	publicapi: add note that API docs have moved to existing docs files (#12770 )	4 months ago
build_dist.sh	cmd/tailscale: add shell tab-completion	7 months ago
build_docker.sh	build_docker.sh: update script comment (#12970 )	4 months ago
flake.lock	nix: update nix and use go 1.23	3 months ago
flake.nix	go.mod.sri: update SRI hash for go.mod changes	3 months ago
go.mod	go.mod: bump github.com/illarion/gonotify/v2	3 months ago
go.mod.sri	go.mod.sri: update SRI hash for go.mod changes	3 months ago
go.sum	go.mod: bump github.com/illarion/gonotify/v2	3 months ago
go.toolchain.branch	all: switch to and require Go 1.23	3 months ago
go.toolchain.rev	go.toolchain.rev: update to 1.23.1 (#13408 )	3 months ago
gomod_test.go	go.mod: add test that replace directives aren't added in oss	1 year ago
header.txt	cmd/k8s-operator: operator can create subnetrouter (#9505 )	11 months ago
pkgdoc_test.go	all: add test for package comments, fix, add comments as needed	4 months ago
pull-toolchain.sh	pull-toolchain.sh: don't run update-flake.sh	2 years ago
shell.nix	go.mod.sri: update SRI hash for go.mod changes	3 months ago
staticcheck.conf	all: cleanup unused code, part 2 (#10670 )	11 months ago
update-flake.sh	Code Improvements (#11311 )	9 months ago
version-embed.go	version: return correct Meta.MajorMinorPatch in non-dev builds	2 years ago
version_test.go	go.mod,wgengine/netstack: bump gvisor	10 months ago

README.md

Tailscale

https://tailscale.com

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 1.23. (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 git log for our commit message style. It's basically the same as Go's style.

About Us

Tailscale is primarily developed by the people at https://github.com/orgs/tailscale/people. For other contributors, see:

Legal

WireGuard is a registered trademark of Jason A. Donenfeld.