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…sion is required by certain clients like UDP to fit response in packet size limit. While generating packet small cache stores recently used names (currently 4 entries) and uses relative references to previous instances of the same name. Each reused instance is just two bytes of relative reference (0xC000 + offset). Cache is currently performing lookup for query name, responses and CNAMEs.
amialkow
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amialkow
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May 15, 2021 20:24
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Implement name compression during response packet generation. Compression is required by certain clients like UDP to fit response in packet size limit. While generating packet small cache stores recently used names (currently 4 entries) and uses relative references to previous instances of the same name. Each reused instance is just two bytes of relative reference (0xC000 + offset). Cache is currently performing lookup for query name, responses and CNAMEs.