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plugin/file: Use NXDOMAIN response if CNAME target is NXDOMAIN (#4303)

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* pass through nxdomain results

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

* return srvfail and nodata results

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

* add test

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

* cover more response cases

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>
This commit is contained in:
Chris O'Haver
2020-12-09 03:44:31 -05:00
committed by GitHub
parent 5ecf23ae7b
commit 6bbb48d403
3 changed files with 145 additions and 8 deletions
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19
test/go-test-tmpfile565156097 Normal file
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$ORIGIN example.org.
@ 3600 IN SOA sns.dns.icann.org. noc.dns.icann.org. (
2017042745 ; serial
7200 ; refresh (2 hours)
3600 ; retry (1 hour)
1209600 ; expire (2 weeks)
3600 ; minimum (1 hour)
)
3600 IN NS a.iana-servers.net.
3600 IN NS b.iana-servers.net.
chain1 3600 IN CNAME nxdomain
nxdomain 3600 IN CNAME nxdomain.example.net.
chain2 3600 IN CNAME srvfail
srvfail 3600 IN CNAME srvfail.example.net.
chain3 3600 IN CNAME nodata
nodata 3600 IN CNAME nodata.example.net.