4b8e0ede6d
Add a vmtest that brings up a Tailscale client, an Ubuntu VM acting as a Mullvad-style plain-WireGuard exit node, and a non-Tailscale webserver, each on its own NAT'd vnet network with a distinct WAN IP. The test exercises Tailscale's IsWireGuardOnly peer code path: the way the control plane wires Mullvad exit nodes into a client's netmap, including the per-client SelfNodeV4MasqAddrForThisPeer source-IP rewrite that lets a Tailscale CGNAT IP egress through a plain-WireGuard tunnel that has no idea what Tailscale is. The mullvad VM doesn't run wireguard-tools or kernel WireGuard; instead, a new TTA endpoint /wg-server-up creates a real Linux TUN named wg0, drives it with wireguard-go (already vendored), and configures the kernel side (ip addr/up, ip_forward, iptables NAT MASQUERADE) so decrypted traffic from the peer egresses with the mullvad VM's WAN IP. Userspace vs kernel WireGuard makes no difference on the wire — what's being tested is Tailscale's plain-WireGuard exit-node code path, not the kernel module — and this lets the test avoid downloading and installing .deb packages inside the VM. Adds Env.BringUpMullvadWGServer (calls /wg-server-up, returns the generated WG public key as a key.NodePublic), Env.SetExitNodeIP (EditPrefs ExitNodeIP directly, for exit nodes whose IPs aren't discoverable via TTA), Env.ControlServer (exposes the underlying testcontrol.Server so tests can UpdateNode / SetMasqueradeAddresses to inject custom peers), and Env.Status (fetches a node's tailscale status, used to read the client's pubkey so we can pin it as the WG server's only allowed peer). The test verifies that the webserver's echoed source IP is the client's WAN with no exit node selected, the mullvad VM's WAN with the WG-only peer selected as exit, and the client's WAN again after clearing. Updates #13038 Change-Id: I5bac4e0d832f05929f12cb77fa9946d7f5fb5ef1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.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.