Brendan CreaneandGitHub
cfd101f9d7
* wgengine: configure DNS even when router.Set fails
Reconfig configured the router first and returned on any router.Set error,
before the DNS block ran. On a host where router config fails on every
reconfig -- e.g. a tun MTU below 1280 that breaks IPv6, or a kernel missing
netfilter features -- the OS resolver was never told about MagicDNS or the
tailnet search domain, so tailnet names failed to resolve with no DNS error
in the logs.
Record the router error and continue instead of returning on it, still
attempt dns.Set, and join the router, DNS, and VPN-reconfigure errors into
the return value. DNS stays after router config (still needed: some DNS
managers refuse to apply settings before the device has an address); only
the error coupling is broken. Fixes a regression from 84430cdfa (v1.8.0).
Updates #20447
Signed-off-by: Brendan Creane <bcreane@gmail.com>
* wgengine/router/osrouter: gate IPv6 on per-interface support, not just global
getV6Available reported IPv6 usable whenever the netfilter runner reported
global IPv6 support, missing the case where the kernel has IPv6 but has not
enabled it on tailscale0 specifically -- e.g. when the tun MTU is below the
1280-byte IPv6 minimum, so /proc/sys/net/ipv6/conf/tailscale0 never exists
and the v6 address and route adds fail, aborting the whole Set. See #20447.
AND a per-interface check into getV6Available, evaluated per call so a later
Set picks up v6 if the interface gains it. All v6-gated operations funnel
through getV6Available, so Set now skips v6 gracefully instead of erroring.
Also remove the dead r.v6Available field that masked this with its global
name.
Updates #20447
Signed-off-by: Brendan Creane <bcreane@gmail.com>
---------
Signed-off-by: Brendan Creane <bcreane@gmail.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.