Build up a simple DNS with Rust
Start your local DNS.
Port is 2054 in default.
$ cargo run
...
Received query: DnsQuestion { name: "google.com", qtype: A }
attempting lookup of A google.com with ns 198.41.0.4
attempting lookup of A google.com with ns 192.12.94.30
attempting lookup of A google.com with ns 216.239.34.10
Answer: A { domain: "google.com", addr: 142.251.42.238, ttl: 300 }Query a specific host name from the local DNS.
$ dig @127.0.0.1 -p 2054 google.com
; <<>> DiG 9.10.6 <<>> @127.0.0.1 -p 2054 google.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10724
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;google.com. IN A
;; ANSWER SECTION:
google.com. 300 IN A 142.251.42.238
;; Query time: 100 msec
;; SERVER: 127.0.0.1#2054(127.0.0.1)
;; WHEN: Mon Feb 27 10:31:45 CST 2023
;; MSG SIZE rcvd: 54- Cache