Splitting these functions does not buy clarity — each has been
extracted before and put back. Pin the //nolint:gocyclo on each
with the reason their shape resists clean decomposition.
policy/v2/policy.go ViaRoutesForPeer — three-pass
via-grant resolution
policy/v2/filter.go compileSSHPolicy — per-rule
branches with
intertwined
autogroup:self
handling
(annotated in the
earlier nil-error
commit)
state/state.go HandleNodeFromPreAuthKey — security-
sensitive
sequential
validation order
servertest/routes_test TestRoutes — table-driven
test driver with
many independent
subtests
Also: //nolint:recvcheck on policy/v2.SSHUser — UnmarshalJSON
requires a pointer receiver; the other methods on this string
newtype use value receivers by convention.
Three regression tests for the user scenario: an in-process
Disconnect/Reconnect, a tailscale-down/up integration test, and
an iptables -j DROP cable-pull integration test.
Updates #3203
Split TestIssues into 7 focused test functions to stay under cyclomatic
complexity limits while testing more aggressively.
Issues surfaced (4 failing tests):
1. initial_map_should_include_peer_online_status: Initial MapResponse
has Online=nil for peers. Online status only arrives later via
PeersChangedPatch.
2. disco_key_should_propagate_to_peers: DiscoPublicKey set by client
is not visible to peers. Peers see zero disco key.
3. approved_route_without_announcement_is_visible: Server-side route
approval without client-side announcement silently produces empty
SubnetRoutes (intersection of empty announced + approved = empty).
4. nodestore_correct_after_rapid_reconnect: After 5 rapid reconnect
cycles, NodeStore reports node as offline despite having an active
poll session. The connect/disconnect grace period interleaving
leaves IsOnline in an incorrect state.
Passing tests (20) verify:
- IP uniqueness across 10 nodes
- IP stability across reconnect
- New peers have addresses immediately
- Node rename propagates to peers
- Node delete removes from all peer lists
- Hostinfo changes (OS field) propagate
- NodeStore/DB consistency after route mutations
- Grace period timing (8-20s window)
- Ephemeral node deletion (not just offline)
- 10-node simultaneous connect convergence
- Rapid sequential node additions
- Reconnect produces complete map
- Cross-user visibility with default policy
- Same-user multiple nodes get distinct IDs
- Same-hostname nodes get unique GivenNames
- Policy change during connect still converges
- DERP region references are valid
- User profiles present for self and peers
- Self-update arrives after route approval
- Route advertisement stored as AnnouncedRoutes
Extend the servertest harness with:
- TestClient.Direct() accessor for advanced operations
- TestClient.WaitForPeerCount and WaitForCondition helpers
- TestHarness.ChangePolicy for ACL policy testing
- AssertDERPMapPresent and AssertSelfHasAddresses
New test suites:
- content_test.go: self node, DERP map, peer properties, user profiles,
update history monotonicity, and endpoint update propagation
- policy_test.go: default allow-all, explicit policy, policy triggers
updates on all nodes, multiple policy changes, multi-user mesh
- ephemeral_test.go: ephemeral connect, cleanup after disconnect,
mixed ephemeral/regular, reconnect prevents cleanup
- routes_test.go: addresses in AllowedIPs, route advertise and approve,
advertised routes via hostinfo, CGNAT range validation
Also fix node_departs test to use WaitForCondition instead of
assert.Eventually, and convert concurrent_join_and_leave to
interleaved_join_and_leave with grace-period-tolerant assertions.
