WithSelfNode and buildTailPeers merge each node's policy CapMap
into the tailcfg.Node.CapMap they emit. State.NodeCapMap and
State.NodeCapMaps wrap the policy manager: NodeCapMap returns a
defensive clone per call; NodeCapMaps snapshots the full per-node
map once for batched callers, amortising pm.mu acquisition across
a peer build.
generateDNSConfig grew a per-node CapMap argument so it can apply
nodeAttr-driven DNS overlays. The nextdns DoH rewrite hardens against
policy-controlled inputs:
- nextDNSDoHHost anchors the prefix match instead of substring,
so a hostile resolver URL cannot smuggle a nextdns hostname in
a path or query.
- nextDNSProfileFromCapMap accepts only profile names matching
[A-Za-z0-9._-]{1,64} and picks the lexicographically first when
multiple are granted -- deterministic, no shell metacharacters
or URL fragments through.
- addNextDNSMetadata composes the rewritten URL via url.Parse +
url.Values rather than fmt.Sprintf, so existing query strings
on the resolver URL survive and metadata cannot inject a new
component.
WithTaildropEnabled in servertest controls cfg.Taildrop.Enabled per
test so cap/file-sharing emission can be toggled in tests that need
to verify the off path.
Replace httptest (real TCP sockets) with tailscale.com/net/memnet
so all connections stay in-process. Wire the client's tsdial.Dialer
to the server's memnet.Network via SetSystemDialerForTest,
preserving the full Noise protocol path.
Also update servertest to use the new Node.Ephemeral.InactivityTimeout
config path introduced in the types refactor, and add WithNodeExpiry
server option for testing default node key expiry behaviour.
Updates #1711
WithTags was defined but never passed through to CreatePreAuthKey.
Fix NewClient to use CreateTaggedPreAuthKey when tags are specified,
enabling tests that need tagged nodes (e.g. via grant steering).
Updates #2180
Add three test files exercising the servertest harness:
- lifecycle_test.go: connection, disconnection, reconnection, session
replacement, and mesh formation at various sizes.
- consistency_test.go: symmetric visibility, consistent peer state,
address presence, concurrent join/leave convergence.
- weather_test.go: rapid reconnects, flapping stability, reconnect
with various delays, concurrent reconnects, and scale tests.
All tests use table-driven patterns with subtests.
Add a new hscontrol/servertest package that provides a test harness
for exercising the full Headscale control protocol in-process, using
Tailscale's controlclient.Direct as the client.
The harness consists of:
- TestServer: wraps a Headscale instance with an httptest.Server
- TestClient: wraps controlclient.Direct with NetworkMap tracking
- TestHarness: orchestrates N clients against a single server
- Assertion helpers for mesh completeness, visibility, and consistency
Export minimal accessor methods on Headscale (HTTPHandler, NoisePublicKey,
GetState, SetServerURL, StartBatcher, StartEphemeralGC) so the servertest
package can construct a working server from outside the hscontrol package.
This enables fast, deterministic tests of connection lifecycle, update
propagation, and network weather scenarios without Docker.
