[client] Add Windows DNS configuration to the debug bundle - #7196
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📝 WalkthroughWalkthroughChangesThe change adds IPv4 and IPv6 reverse DNS zone anonymization. It also adds Windows DNS diagnostics for NRPT, registry, interface, and adapter data in debug bundles. DNS anonymization and Windows diagnostics
Estimated code review effort: 4 (Complex) | ~45 minutes Mergeability Score: 🔵 Low · up to Windows debug-bundle collection may alter COM state by uninitializing an apartment it did not initialize, potentially affecting other COM-dependent work in the process. The change is otherwise diagnostics-only, but this bounded runtime risk should be addressed or explicitly accepted before merge. Sequence Diagram(s)sequenceDiagram
participant DebugBundle
participant Registry
participant NRPTPolicy
participant Adapters
participant Anonymizer
DebugBundle->>Registry: read DNS policy and interface values
DebugBundle->>NRPTPolicy: read effective NRPT entries
DebugBundle->>Adapters: read adapter DNS configuration
DebugBundle->>Anonymizer: anonymize domains and addresses
Anonymizer-->>DebugBundle: return anonymized values
DebugBundle-->>DebugBundle: write dns_windows.txt
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🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (3 passed)
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Actionable comments posted: 4
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Inline comments:
In `@client/internal/debug/debug_windows.go`:
- Around line 190-193: Update the error branch after readRegistryValue in the
registry-value enumeration to write an error line identifying the affected name
and read failure before continuing. Preserve the existing behavior of skipping
the unavailable value while ensuring the bundle output does not silently omit
read errors.
- Around line 265-274: Update the adapter address handling near ip and servers
to convert the net.IP value with netip.AddrFromSlice, call Unmap on the
resulting address, and use the normalized netip.Addr for both output and
anonymization instead of ip.String(). Preserve skipping adapters when conversion
fails.
In `@client/internal/debug/nrpt_windows.go`:
- Around line 65-79: Bound the blocking nrptPolicyTableText query in the NRPT
retrieval flow so a stalled WMI provider cannot accumulate goroutines or locked
OS threads after the caller timeout. Update the code around the existing done
channel and nrptPolicyTimeout select to enforce a shared concurrency limit or
equivalent isolation, while preserving the current result parsing and timeout
error behavior.
- Around line 98-101: Update the initialization flow around coInitialize so
cleanup tracks ownership: return the error immediately for RPC_E_CHANGED_MODE
without registering ole.CoUninitialize, and defer ole.CoUninitialize only when
coInitialize returns S_OK or S_FALSE.
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📒 Files selected for processing (10)
client/anonymize/anonymize.goclient/anonymize/reverse_zone.goclient/anonymize/reverse_zone_test.goclient/internal/debug/debug.goclient/internal/debug/debug_nonunix.goclient/internal/debug/debug_windows.goclient/internal/debug/debug_windows_test.goclient/internal/debug/nrpt_windows.goclient/internal/dns/host_windows.gogo.mod
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GHCR images (amd64)
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pappz
approved these changes
Aug 13, 2026
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Describe your changes
Windows was the one platform whose debug bundle carried no DNS configuration at all, while Unix contributes resolv.conf and macOS contributes scutil output. Diagnosing a name resolution problem there meant asking the reporter to run registry and PowerShell commands by hand, and the answers were not comparable between reports. The bundle now collects the same picture itself, through the registry and iphlpapi rather than by shelling out.
go-olemoves from an indirect to a direct dependency. It is already in the module graph through the WMI package, at the same version.Issue ticket number and link
Diagnostics only, no behavior change to the client itself.
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Summary by CodeRabbit
New Features
Bug Fixes
Documentation