dns_parser/rdata/
cname.rs

1use Name;
2
3#[derive(Debug, Clone, Copy)]
4pub struct Record<'a>(pub Name<'a>);
5
6impl<'a> ToString for Record<'a> {
7    #[inline]
8    fn to_string(&self) -> String {
9        self.0.to_string()
10    }
11}
12
13impl<'a> super::Record<'a> for Record<'a> {
14
15    const TYPE: isize = 5;
16
17    fn parse(rdata: &'a [u8], original: &'a [u8]) -> super::RDataResult<'a> {
18        let name = Name::scan(rdata, original)?;
19        let record = Record(name);
20        Ok(super::RData::CNAME(record))
21    }
22}
23
24#[cfg(test)]
25mod test {
26
27    use std::net::Ipv4Addr;
28    use {Packet, Header};
29    use Opcode::*;
30    use ResponseCode::NoError;
31    use QueryType as QT;
32    use QueryClass as QC;
33    use Class as C;
34    use RData;
35
36    #[test]
37    fn parse_response() {
38        let response = b"\xfc\x9d\x81\x80\x00\x01\x00\x06\x00\x02\x00\x02\x03\
39            cdn\x07sstatic\x03net\x00\x00\x01\x00\x01\xc0\x0c\x00\x05\x00\x01\
40            \x00\x00\x00f\x00\x02\xc0\x10\xc0\x10\x00\x01\x00\x01\x00\x00\x00\
41            f\x00\x04h\x10g\xcc\xc0\x10\x00\x01\x00\x01\x00\x00\x00f\x00\x04h\
42            \x10k\xcc\xc0\x10\x00\x01\x00\x01\x00\x00\x00f\x00\x04h\x10h\xcc\
43            \xc0\x10\x00\x01\x00\x01\x00\x00\x00f\x00\x04h\x10j\xcc\xc0\x10\
44            \x00\x01\x00\x01\x00\x00\x00f\x00\x04h\x10i\xcc\xc0\x10\x00\x02\
45            \x00\x01\x00\x00\x99L\x00\x0b\x08cf-dns02\xc0\x10\xc0\x10\x00\x02\
46            \x00\x01\x00\x00\x99L\x00\x0b\x08cf-dns01\xc0\x10\xc0\xa2\x00\x01\
47            \x00\x01\x00\x00\x99L\x00\x04\xad\xf5:5\xc0\x8b\x00\x01\x00\x01\x00\
48            \x00\x99L\x00\x04\xad\xf5;\x04";
49
50        let packet = Packet::parse(response).unwrap();
51        assert_eq!(packet.header, Header {
52            id: 64669,
53            query: false,
54            opcode: StandardQuery,
55            authoritative: false,
56            truncated: false,
57            recursion_desired: true,
58            recursion_available: true,
59            authenticated_data: false,
60            checking_disabled: false,
61            response_code: NoError,
62            questions: 1,
63            answers: 6,
64            nameservers: 2,
65            additional: 2,
66        });
67
68        assert_eq!(packet.questions.len(), 1);
69        assert_eq!(packet.questions[0].qtype, QT::A);
70        assert_eq!(packet.questions[0].qclass, QC::IN);
71        assert_eq!(&packet.questions[0].qname.to_string()[..], "cdn.sstatic.net");
72        assert_eq!(packet.answers.len(), 6);
73        assert_eq!(&packet.answers[0].name.to_string()[..], "cdn.sstatic.net");
74        assert_eq!(packet.answers[0].cls, C::IN);
75        assert_eq!(packet.answers[0].ttl, 102);
76        match packet.answers[0].data {
77            RData::CNAME(cname) => {
78                assert_eq!(&cname.0.to_string(), "sstatic.net");
79            }
80            ref x => panic!("Wrong rdata {:?}", x),
81        }
82
83        let ips = vec![
84            Ipv4Addr::new(104, 16, 103, 204),
85            Ipv4Addr::new(104, 16, 107, 204),
86            Ipv4Addr::new(104, 16, 104, 204),
87            Ipv4Addr::new(104, 16, 106, 204),
88            Ipv4Addr::new(104, 16, 105, 204),
89        ];
90        for i in 1..6 {
91            assert_eq!(&packet.answers[i].name.to_string()[..], "sstatic.net");
92            assert_eq!(packet.answers[i].cls, C::IN);
93            assert_eq!(packet.answers[i].ttl, 102);
94            match packet.answers[i].data {
95                RData::A(addr) => {
96                    assert_eq!(addr.0, ips[i-1]);
97                }
98                ref x => panic!("Wrong rdata {:?}", x),
99            }
100        }
101    }
102}
dns_parser/rdata/cname.rs

dns_parser/rdata/
cname.rs
