Comment by tpmoney
If you were writing a Java application, would you do your own DNS resolution, or would you make a new socket address object and give it a hostname and let the api resolve the hostname for you? If you don’t hand roll your own dns protocol lookups, how do you know the OS, or Java or your socket library aren’t intercepting and modifying request out from under you? Heck, even if you use getaddrinfo directly how do you know your libc implementation isn’t intercepting and modifying the lookups on you? If the threat model you’re coding for is “Apple is a hostile actor intercepting and modifying dns queries” then you really can’t trust their provided posix calls either.
> If you were writing a Java application, would you do your own DNS resolution,
Java isn't known to nanny the users of apps developed in it's language. It's never even tried IMO.
> If the threat model you’re coding for is “Apple is a hostile actor intercepting and modifying dns queries” then you really can’t trust their provided posix calls either.
Sure, but that isn't the threat model. I described the threat model above, which is closer to "I don't trust a company famous for trying to nanny not to try to nanny if using their preferred developer frameworks, while I kind of trust they won't for a legacy API they barely pay attention to".