plugin/grpc: enforce DNS message size limits#7490
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Add DNS wire size validation for requests/replies. Limit gRPC recv/send via default call options, accounting necessary framing/protobuf overhead. An error is returned for oversized messages. Add test. Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>
Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## master #7490 +/- ##
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+ Coverage 55.70% 60.14% +4.44%
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Files 224 274 +50
Lines 10016 18164 +8148
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+ Hits 5579 10925 +5346
- Misses 3978 6603 +2625
- Partials 459 636 +177 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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This was referenced Jan 20, 2026
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1. Why is this pull request needed and what does it do?
Add DNS wire size validation for requests/replies in the gRPC plugin. Limit gRPC recv/send via default call options, accounting necessary framing/protobuf overhead. An error is returned for oversized messages. Adds a unit test that rejects an oversized request/reply.
2. Which issues (if any) are related?
None found.
3. Which documentation changes (if any) need to be made?
None required. This aligns behaviour with the DNS spec and doesn’t change user-facing configuration.
4. Does this introduce a backward incompatible change or deprecation?
No.