simple_dns/dns/rdata/
afsdb.rs

1use crate::{
2    bytes_buffer::BytesBuffer,
3    dns::{Name, WireFormat},
4    lib::{Seek, Write},
5};
6
7use super::RR;
8
9/// AFSDB records represents servers with ASD cells
10#[derive(Debug, PartialEq, Eq, Hash, Clone)]
11pub struct AFSDB<'a> {
12    /// An integer that represents the subtype
13    pub subtype: u16,
14    /// A [name](`Name`) of a host that has a server for the cell named by the owner name of the RR
15    pub hostname: Name<'a>,
16}
17
18impl RR for AFSDB<'_> {
19    const TYPE_CODE: u16 = 18;
20}
21
22impl AFSDB<'_> {
23    /// Transforms the inner data into its owned type
24    pub fn into_owned<'b>(self) -> AFSDB<'b> {
25        AFSDB {
26            subtype: self.subtype,
27            hostname: self.hostname.into_owned(),
28        }
29    }
30}
31
32impl<'a> WireFormat<'a> for AFSDB<'a> {
33    const MINIMUM_LEN: usize = 2;
34
35    fn parse(data: &mut BytesBuffer<'a>) -> crate::Result<Self>
36    where
37        Self: Sized,
38    {
39        let subtype = data.get_u16()?;
40        let hostname = Name::parse(data)?;
41
42        Ok(Self { subtype, hostname })
43    }
44
45    fn write_to<T: Write>(&self, out: &mut T) -> crate::Result<()> {
46        out.write_all(&self.subtype.to_be_bytes())?;
47        self.hostname.write_to(out)
48    }
49
50    fn write_compressed_to<T: Write + Seek>(
51        &'a self,
52        out: &mut T,
53        name_refs: &mut crate::lib::BTreeMap<&[crate::Label<'a>], u16>,
54    ) -> crate::Result<()> {
55        out.write_all(&self.subtype.to_be_bytes())?;
56        self.hostname.write_compressed_to(out, name_refs)
57    }
58
59    fn len(&self) -> usize {
60        self.hostname.len() + Self::MINIMUM_LEN
61    }
62}
63
64#[cfg(test)]
65mod tests {
66    use crate::lib::{ToString, Vec};
67
68    use super::*;
69
70    #[test]
71    fn parse_and_write_afsdb() {
72        let afsdb = AFSDB {
73            subtype: 1,
74            hostname: Name::new("e.hostname.com").unwrap(),
75        };
76
77        let mut data = Vec::new();
78        assert!(afsdb.write_to(&mut data).is_ok());
79
80        let afsdb = AFSDB::parse(&mut BytesBuffer::new(&data));
81        assert!(afsdb.is_ok());
82        let afsdb = afsdb.unwrap();
83
84        assert_eq!(data.len(), afsdb.len());
85        assert_eq!(1, afsdb.subtype);
86        assert_eq!("e.hostname.com", afsdb.hostname.to_string());
87    }
88
89    #[test]
90    #[cfg(feature = "std")]
91    fn parse_sample() -> Result<(), Box<dyn std::error::Error>> {
92        use crate::{rdata::RData, ResourceRecord};
93        let sample_file = std::fs::read("samples/zonefile/AFSDB.sample")?;
94
95        let sample_rdata = match ResourceRecord::parse(&mut BytesBuffer::new(&sample_file))?.rdata {
96            RData::AFSDB(rdata) => rdata,
97            _ => unreachable!(),
98        };
99
100        assert_eq!(sample_rdata.subtype, 0);
101        assert_eq!(sample_rdata.hostname, "hostname.sample".try_into()?);
102        Ok(())
103    }
104}
simple_dns/dns/rdata/afsdb.rs

simple_dns/dns/rdata/
afsdb.rs
