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localhost not preloaded #29

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daurnimator opened this issue Jul 15, 2018 · 0 comments

daurnimator commented Jul 15, 2018

I was suprised to see dns.c reach out to my dns server to ask about 'localhost'.

rfc6761:

6.3. Domain Name Reservation Considerations for "localhost."

...

Name resolution APIs and libraries SHOULD recognize localhost
names as special and SHOULD always return the IP loopback address
for address queries and negative responses for all other query
types. Name resolution APIs SHOULD NOT send queries for
localhost names to their configured caching DNS server(s).

I tracked this down to be due to /etc/hosts not containing a 'localhost' entry: dns.c needs to treat localhost specially.

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