2 releases
0.1.1 | Dec 12, 2018 |
---|---|
0.1.0 | Nov 25, 2018 |
#4 in #knot
2MB
43K
SLoC
Contains (WOFF font, 19KB) glyphicons-halflings-regular.woff2
rust-kres
This crate provids a safe interface for Knot Resolver library (libkres). libkres is an implementation of a full DNS recursive resolver, including cache and DNSSEC validation. It doesn't require a specific I/O model and instead provides a generic interface for pushing/pulling DNS messages until the request is satisfied.
Example:
use std::net::{SocketAddr, UdpSocket};
use kres::{Context, Request, State};
// DNS message wire format
let question = [2, 104, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 1];
let from_addr = "127.0.0.1:1234".parse::<SocketAddr>().unwrap();
let context = Context::new();
let req = Request::new(context.clone());
let mut state = req.consume(&question, from_addr);
// Process the subrequests
while state == State::PRODUCE {
state = match req.produce() {
Some((msg, addr_set)) => {
// This can be any I/O model the application uses
let mut socket = UdpSocket::bind("0.0.0.0:0").unwrap();
socket.send_to(&msg, &addr_set[0]).unwrap();
let mut buf = [0; 512];
let (amt, src) = socket.recv_from(&mut buf).unwrap();
// Pass the response back to the request
req.consume(&buf[..amt], src)
},
None => {
break;
}
}
}
// Convert request into final answer
let answer = req.finish(state).unwrap();
Dependencies
~1.6–4MB
~76K SLoC