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Josh Bleecher Snyder 6f23087175 wgengine/magicsock: unify initial bind and rebind We had two separate code paths for the initial UDP listener bind and any subsequent rebinds. IPv6 got left out of the rebind code. Rather than duplicate it there, unify the two code paths. Then improve the resulting code: * Rebind had nested listen attempts to try the user-specified port first, and then fall back to :0 if that failed. Convert that into a loop. * Initial bind tried only the user-specified port. Rebind tried the user-specified port and 0. But there are actually three ports of interest: The one the user specified, the most recent port in use, and 0. We now try all three in order, as appropriate. * In the extremely rare case in which binding to port 0 fails, use a dummy net.PacketConn whose reads block until close. This will keep the wireguard-go receive func goroutine alive. As a pleasant side-effect of this, if we decide that we need to resuscitate #1796, it will now be much easier. Fixes #1799 Co-authored-by: David Anderson <danderson@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>		4 years ago
.github	.github/workflows: add --race tests on Linux and Windows	4 years ago
atomicfile	atomicfile: don't Chmod on windows	4 years ago
client/tailscale	ipn/ipnlocal, etc: require file sharing capability to send/recv files	4 years ago
cmd	wgengine/magicsock: unify initial bind and rebind	4 years ago
control/controlclient	control/controlclient: fix signRegisterRequest log suppression check on Windows	4 years ago
derp	derp/derpmap: add São Paulo (derp11)	4 years ago
disco	Added 2 fuzzers	4 years ago
health	health, wgenegine: fix receive func health checks for the fourth time	4 years ago
internal	wgengine: move DNS configuration out of wgengine/router.	4 years ago
ipn	ipn/ipnlocal: prevent a now-expected [unexpected] log message on Windows	4 years ago
log	log/filelogger: move our Windows disk file writing+rotation package here	4 years ago
logpolicy	logpolicy: set log target on windows based on a registry key (#1542 )	4 years ago
logtail	logtail: reduce PublicID.UnmarshalText from 2 allocs to 0	4 years ago
metrics	metrics: add LabelMap.GetFloat	4 years ago
net	net/tstun: split TUN events channel into up/down and MTU	4 years ago
paths	ipn, paths, cmd/tailscaled: remove LegacyConfigPath, relaynode migration	4 years ago
portlist	portlist: de-dup services on same (proto, port) on both IPv4/IPv6	4 years ago
safesocket	safesocket: remove/update some old TODOs	4 years ago
scripts	Allow 2021 in LICENSE header.	4 years ago
smallzstd	smallzstd: new package that constructs zstd small encoders/decoders.	4 years ago
syncs	syncs: disable TestWatchMultipleValues on Windows CI builds	4 years ago
tailcfg	control/controlclient, tailcfg: add Debug.SleepSeconds (mapver 19)	4 years ago
tempfork	tempfork/wireguard-windows/firewall: add.	4 years ago
tsconst	net/netns: add windows support.	4 years ago
tstest	tstest/natlab: use net.ErrClosed	4 years ago
tstime	tstime: add RandomDurationBetween helper	4 years ago
tsweb	tsweb: add num_goroutines expvar	4 years ago
types	types/netmap: remove some old TODOs	4 years ago
util	util/cmpver: move into OSS from corp repo.	4 years ago
version	version: simplify iOS detection now that we require Go 1.16	4 years ago
wgengine	wgengine/magicsock: unify initial bind and rebind	4 years ago
.gitattributes	.gitattributes: add a smudge filter for go.mod.	5 years ago
.gitignore	Revert "cmd/tailscaled: split package main into main shim + package"	4 years ago
AUTHORS	Move Linux client & common packages into a public repo.	5 years ago
CODE_OF_CONDUCT.md	Add a code of conduct.	5 years ago
Dockerfile	build_docker.sh, Dockerfile: fix bug with shell quoting	4 years ago
LICENSE	LICENSE: Reformat for Github	4 years ago
Makefile	wgengine/netstack: fix 32-bit build broken from prior commit	4 years ago
PATENTS	Move Linux client & common packages into a public repo.	5 years ago
README.md	Switch to Go 1.16.	4 years ago
SECURITY.md	Add a SECURITY.md for vulnerability reports.	5 years ago
VERSION.txt	VERSION.txt: this is 1.7.0.	4 years ago
api.md	api.md: clarify response behaviour for ACL POST endpoint	4 years ago
build_dist.sh	build_dist: fix after version refactor.	4 years ago
build_docker.sh	build_docker.sh, Dockerfile: fix bug with shell quoting	4 years ago
go.mod	cmd/tailscale: make the new 'up' errors prettier and more helpful	4 years ago
go.sum	cmd/tailscale: make the new 'up' errors prettier and more helpful	4 years ago
shell.nix	add nix-shell boilerplate (#1028 )	4 years ago

README.md

Tailscale

https://tailscale.com

Private WireGuard® networks made easy

Overview

This repository contains all the open source Tailscale client code and the tailscaled daemon and tailscale CLI tool. The tailscaled daemon runs primarily on Linux; it also works to varying degrees on FreeBSD, OpenBSD, Darwin, and Windows.

The Android app is at https://github.com/tailscale/tailscale-android

Using

We serve packages for a variety of distros 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 that are not open source.

Building

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.

We only guarantee to support the latest Go release and any Go beta or release candidate builds (currently Go 1.16) in module mode. It might work in earlier Go versions or in GOPATH mode, but we're making no effort to keep those working.

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.

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.