I'm trying to take some time on vacation to learn how to make a round trip DNS request using some cached RFCs I saved before turning my wifi off. My vacation spot has some internet but my laptop will only be able to connect to the gateway which of course has a DNS server, so I will be testing against it.
cargo run -- MX google.com
It can handle the following response types: A, AAAA, MX, SOA. New types are very easy
to add.