c-ares / c-ares / 28739437241

90%

Build Type

push

github

Committed by web-flow

Commit Message

skip name compression offsets beyond the 14-bit pointer limit (#1159)

ares_nameoffset_create() records every written name as a compression
target, but that offset is later emitted as a 14-bit pointer (0xC000 |
(idx & 0x3FFF)). Once a message serializes past 16383 bytes, a repeated
owner or target name gets encoded as a pointer to idx & 0x3FFF rather
than its real position, so ares_dns_write() produces a message that no
longer parses. Skip recording offsets that can't fit 14 bits; those
names get written uncompressed instead.

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Signed-off-by: Brad House <brad@brad-house.com>
Co-authored-by: Brad House <brad@brad-house.com>

Coverage Stats

36 of 36 new or added lines in 2 files covered. (100.0%)

4 existing lines in 2 files now uncovered.

24076 of 26790 relevant lines covered (89.87%)

15879.25 hits per line