This PR limit rewrite cname recursion with the existing DNS server loop counter.
The issu was that rewrite cname can recurse indefinitely through internal lookups, causing crash at the end
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
* fix(rewrite): fix cname target rewrite for CNAME chains
This fix corrects the cname target rewrite to handle CNAME chains:
- Preserves only the CNAME records before matching the rule
- Rewrites only the CNAME target that matches the rule
- Includes all records from the re-resolved upstream response
Signed-off-by: hide <hide@hide.net.eu.org>
* docs(rewrite): document how answer records are handled in CNAME target rewrite
Signed-off-by: hide <hide@hide.net.eu.org>
* fix(rewrite): simplify slice append per staticcheck S1011
Signed-off-by: hide <hide@hide.net.eu.org>
* docs(rewrite): add extra line between code and paragraph
Signed-off-by: hide <hide@hide.net.eu.org>
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Signed-off-by: hide <hide@hide.net.eu.org>
Co-authored-by: hide <hide@hide.net.eu.org>
Forward information that a upstream response is truncated when rewriting
a CNAME. Otherwise, the cache plugin stores the truncated resonse,
making it impossible to receive the full response as a client via TCP.
Signed-off-by: Yannick Epstein <yannicke@spotify.com>
