dns-parser-revived 0.10.0

Pure-rust DNS protocol parser library. This does not support network, only raw protocol parser.
Documentation 
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use std::fmt::Display;

use crate::Name;

#[derive(Debug, Clone, Copy)]
pub struct Record<'a>(pub Name<'a>);

impl Display for Record<'_> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        self.0.fmt(f)
    }
}

impl<'a> super::Record<'a> for Record<'a> {
    const TYPE: isize = 12;

    fn parse(rdata: &'a [u8], original: &'a [u8]) -> super::RDataResult<'a> {
        let name = Name::scan(rdata, original)?;
        let record = Record(name);
        Ok(super::RData::PTR(record))
    }
}

#[cfg(test)]
mod test {

    use crate::Class as C;
    use crate::Opcode::*;
    use crate::QueryClass as QC;
    use crate::QueryType as QT;
    use crate::RData;
    use crate::ResponseCode::NoError;
    use crate::{Header, Packet};

    #[test]
    fn parse_response() {
        let response = b"\x53\xd6\x81\x80\x00\x01\x00\x01\x00\x00\x00\x00\
                           \x0269\x0293\x0275\x0272\x07in-addr\x04arpa\x00\
                           \x00\x0c\x00\x01\
                           \xc0\x0c\x00\x0c\x00\x01\x00\x01\x51\x80\x00\x1e\
                           \x10pool-72-75-93-69\x07verizon\x03net\x00";
        let packet = Packet::parse(response).unwrap();
        assert_eq!(
            packet.header,
            Header {
                id: 21462,
                query: false,
                opcode: StandardQuery,
                authoritative: false,
                truncated: false,
                recursion_desired: true,
                recursion_available: true,
                authenticated_data: false,
                checking_disabled: false,
                response_code: NoError,
                questions: 1,
                answers: 1,
                nameservers: 0,
                additional: 0,
            }
        );
        assert_eq!(packet.questions.len(), 1);
        assert_eq!(packet.questions[0].qtype, QT::PTR);
        assert_eq!(packet.questions[0].qclass, QC::IN);
        assert_eq!(
            &packet.questions[0].qname.to_string()[..],
            "69.93.75.72.in-addr.arpa"
        );
        assert_eq!(packet.answers.len(), 1);
        assert_eq!(
            &packet.answers[0].name.to_string()[..],
            "69.93.75.72.in-addr.arpa"
        );
        assert_eq!(packet.answers[0].cls, C::IN);
        assert_eq!(packet.answers[0].ttl, 86400);
        match packet.answers[0].data {
            RData::PTR(name) => {
                assert_eq!(&name.0.to_string()[..], "pool-72-75-93-69.verizon.net");
            }
            ref x => panic!("Wrong rdata {:?}", x),
        }
    }
}