flex_dns/rdata/
cds.rs

1use crate::{Buffer, DnsMessage, DnsMessageError, MutBuffer};
2use crate::characters::Characters;
3use crate::parse::Parse;
4use crate::rdata::{RData, RDataParse};
5use crate::write::WriteBytes;
6
7/// # Child Delegation Signer (CDS) Record
8/// This record is used to publish the key tag, algorithm, and digest type
9/// used in the DS record of a child zone.
10#[derive(Copy, Clone, Debug, PartialEq)]
11pub struct Cds<'a> {
12    /// The key tag of the key that is being published.
13    pub key_tag: u16,
14    /// The algorithm of the key that is being published.
15    pub algorithm: u8,
16    /// The digest type of the key that is being published.
17    pub digest_type: u8,
18    /// The digest of the key that is being published.
19    pub digest: Characters<'a>,
20}
21
22impl<'a> RDataParse<'a> for Cds<'a> {
23    #[inline]
24    fn parse(rdata: &RData<'a>, i: &mut usize) -> Result<Self, DnsMessageError> {
25        let key_tag = u16::parse(rdata, i)?;
26        let algorithm = u8::parse(rdata, i)?;
27        let digest_type = u8::parse(rdata, i)?;
28        let digest = Characters::parse(rdata, i)?;
29
30        Ok(Self {
31            key_tag,
32            algorithm,
33            digest_type,
34            digest,
35        })
36    }
37}
38
39impl<'a> WriteBytes for Cds<'a> {
40    #[inline]
41    fn write<
42        const PTR_STORAGE: usize,
43        const DNS_SECTION: usize,
44        B: MutBuffer + Buffer,
45    >(&self, message: &mut DnsMessage<PTR_STORAGE, DNS_SECTION, B>) -> Result<usize, DnsMessageError> {
46        let mut bytes = 0;
47
48        bytes += self.key_tag.write(message)?;
49        bytes += self.algorithm.write(message)?;
50        bytes += self.digest_type.write(message)?;
51        bytes += self.digest.write(message)?;
52
53        Ok(bytes)
54    }
55}
56
57#[cfg(test)]
58mod test {
59    use crate::rdata::testutils::parse_write_test;
60
61    use super::*;
62
63    parse_write_test!(
64        5,
65        [ 0x00, 0x01, 0x08, 0x01, 0x00 ],
66        Cds {
67            key_tag: 1,
68            algorithm: 8,
69            digest_type: 1,
70            digest: unsafe { Characters::new_unchecked(&[]) },
71        },
72    );
73}
flex_dns/rdata/cds.rs

flex_dns/rdata/
cds.rs
