[client] Delete NRPT rules by enumerating the registry instead of a rule count - #7195
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📝 WalkthroughWalkthroughWindows NRPT policy creation now uses indexed keys with a shared prefix. Cleanup enumerates and removes matching local and GPO registry keys. Shutdown state no longer stores the NRPT rule count, and tests verify registry-based counting and cleanup without stored state. ChangesWindows NRPT cleanup
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The cleanup now enumerates registry-backed NRPT rules, but a GPO write failure can still leave a partial DNS policy active and route namespaces incorrectly. Merge should wait for this bounded correctness issue to be fixed or explicitly accepted by the owner. Sequence Diagram(s)sequenceDiagram
participant DNSConfigurator
participant RegistryEnumerator
participant WindowsPolicyStore
DNSConfigurator->>RegistryEnumerator: enumerate NRPTKeyPrefix matches
RegistryEnumerator->>WindowsPolicyStore: read local and GPO subkeys
WindowsPolicyStore-->>RegistryEnumerator: return matching key names
RegistryEnumerator-->>DNSConfigurator: return owned keys
DNSConfigurator->>WindowsPolicyStore: delete owned policy keys
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Actionable comments posted: 2
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Inline comments:
In `@client/internal/dns/host_windows.go`:
- Around line 368-371: Update the rule-creation flow around configureDNSPolicy
to track every local and batch rule path created during the invocation. If GPO
policy configuration fails, remove those paths before returning, and aggregate
any cleanup errors with the original configuration error while preserving the
existing rule-index context.
- Around line 559-561: Update the registry-open error handling in the
surrounding NRPT policy cleanup function: return an empty result only when the
error is registry.ErrNotExist, and propagate all other registry access or I/O
errors to removeDNSMatchPolicies instead of logging and returning nil, nil.
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📒 Files selected for processing (3)
client/internal/dns/host_windows.goclient/internal/dns/host_windows_test.goclient/internal/dns/unclean_shutdown_windows.go
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# Conflicts: # client/internal/dns/host_windows.go
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2 participants
Describe your changes
NRPT rule cleanup on Windows deleted the indexed registry keys by counting them instead of reading what is actually there. That count lives only in memory and in the persisted shutdown state, and both can be absent: a configurator that never applied a DNS config starts at zero, and a clean disconnect deletes the state entry. In those cases the loop deletes nothing and any rule it skipped stays behind, keeping a namespace pointed at an interface that is gone until a reboot discards the volatile key. The registry is the authoritative record of what was written, so cleanup reads it.
Issue ticket number and link
Hardening of existing cleanup, no behavior change on the path where the count is intact.
Stack
Checklist
Documentation
Select exactly one:
Docs PR URL (required if "docs added" is checked)
Paste the PR link from https://github.com/netbirdio/docs here:
https://github.com/netbirdio/docs/pull/__
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