use std::collections::HashMap;
use crate::dns::{name::Label, CharacterString, PacketPart};
use super::RR;
#[derive(Debug, PartialEq, Eq, Hash, Clone)]
pub struct HINFO<'a> {
pub cpu: CharacterString<'a>,
pub os: CharacterString<'a>,
}
impl<'a> RR for HINFO<'a> {
const TYPE_CODE: u16 = 13;
}
impl<'a> HINFO<'a> {
pub fn into_owned<'b>(self) -> HINFO<'b> {
HINFO {
cpu: self.cpu.into_owned(),
os: self.os.into_owned(),
}
}
}
impl<'a> PacketPart<'a> for HINFO<'a> {
fn parse(data: &'a [u8], position: usize) -> crate::Result<Self>
where
Self: Sized,
{
let cpu = CharacterString::parse(data, position)?;
let os = CharacterString::parse(data, position + cpu.len())?;
Ok(Self { cpu, os })
}
fn write_to<T: std::io::Write>(&self, out: &mut T) -> crate::Result<()> {
self.cpu.write_to(out)?;
self.os.write_to(out)
}
fn write_compressed_to<T: std::io::Write + std::io::Seek>(
&'a self,
out: &mut T,
name_refs: &mut HashMap<&'a [Label<'a>], usize>,
) -> crate::Result<()> {
self.cpu.write_compressed_to(out, name_refs)?;
self.os.write_compressed_to(out, name_refs)
}
fn len(&self) -> usize {
self.cpu.len() + self.os.len()
}
}
#[cfg(test)]
mod tests {
use crate::{rdata::RData, ResourceRecord};
use super::*;
#[test]
fn parse_and_write_hinfo() {
let hinfo = HINFO {
cpu: CharacterString::new(b"\"some cpu").unwrap(),
os: CharacterString::new(b"\"some os").unwrap(),
};
let mut data = Vec::new();
assert!(hinfo.write_to(&mut data).is_ok());
let hinfo = HINFO::parse(&data, 0);
assert!(hinfo.is_ok());
let hinfo = hinfo.unwrap();
assert_eq!(data.len(), hinfo.len());
assert_eq!("\"some cpu", hinfo.cpu.to_string());
assert_eq!("\"some os", hinfo.os.to_string());
}
#[test]
fn parse_sample() -> Result<(), Box<dyn std::error::Error>> {
let sample_file = std::fs::read("samples/zonefile/HINFO.sample")?;
let sample_rdata = match ResourceRecord::parse(&sample_file, 0)?.rdata {
RData::HINFO(rdata) => rdata,
_ => unreachable!(),
};
assert_eq!(sample_rdata.cpu, "Generic PC clone".try_into()?);
assert_eq!(sample_rdata.os, "NetBSD-1.4".try_into()?);
Ok(())
}
}