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Apply the IPv6 server blacklist to all nameserver sources, not just Windows #193

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merged 1 commit into from May 17, 2018

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b-spencer commented May 17, 2018

For #164, I mentioned that it seemed like the IPv6 nameserver blacklist should apply to all OSes. In a mailing list post, @bradh352 agreed and suggested that I file a PR to make it so. This is that PR. Sorry for the delay.

This moves the blacklist check from being Windows-specific to being a general feature of config_nameservers(), no matter the nameserver source. It also simplifies the ares_ipv6_server_blacklisted() implementation to not parse and re-parse the blacklisted IPv6 addresses from strings on every check. I think they're almost as easy to read as a sequence of hex bytes in an array initializer, and it's definitely less work on each trip through the code.

The new unit test for this behaviour passes on Linux x86_64.

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bradh352 commented May 17, 2018

looks good, I'll merge once travis finishes successfully

@bradh352 bradh352 self-requested a review May 17, 2018

@bradh352 bradh352 merged commit 7458fd5 into c-ares:master May 17, 2018

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