Files
netbird/proxy/internal
mlsmaycon b21a91a507 fix(service): require non-empty host + direct_upstream on cluster targets
Cluster targets dial the upstream via the host network stack, so an
empty Host leaves the proxy with nothing to dial and DirectUpstream=false
would route the request through the embedded NetBird client (wrong
network for a cluster address). Validate() and validateTargetReferences
now reject both shapes.

Tests:
- TestValidate_HTTPClusterTarget / _RequiresTargetId /
  TestValidate_Private_{AcceptsClusterTargetWithAccessGroups,
  RequiresAccessGroups, RejectsBearerAuth} updated to populate Host and
  DirectUpstream so they exercise the path past the new gates.
- TestValidate_HTTPClusterTarget_RequiresHost and _RequiresDirectUpstream
  pin the two new error paths.
- TestValidateTargetReferences_ClusterTargetSkipsLookup updated to set
  DirectUpstream on its fixture; new _ClusterTargetRequiresDirectUpstream
  test covers the store-side rejection.

Drive-bys (no behavior change beyond what existing tests cover):
- proxy/proxy.go: shortened the Capabilities.Private / Cluster.Private
  doc comments.
- users/manager.go: moved the GetUserWithGroups doc from the interface
  to the impl.
- proxy/cmd/proxy/cmd/root.go: removed unused NewRootCmd.
- tunnel_cache.go: bumped tunnelCacheTTL from 30s to 300s (matches the
  "5 minutes" target documented on the constant; existing TTL-expiry
  test uses the constant directly so the bump is picked up automatically).
2026-05-21 11:30:07 +02:00
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