flex_dns/rdata/
ds.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/// # Delegation signer record
8/// This record is used to store a cryptographic hash of a DNSKEY record.
9#[derive(Copy, Clone, Debug, PartialEq)]
10pub struct Ds<'a> {
11    /// The key tag of the DNSKEY record.
12    pub key_tag: u16,
13    /// The algorithm of the DNSKEY record.
14    pub algorithm: u8,
15    /// The digest type of the DNSKEY record.
16    pub digest_type: u8,
17    /// The digest of the DNSKEY record.
18    pub digest: Characters<'a>,
19}
20
21impl<'a> RDataParse<'a> for Ds<'a> {
22    #[inline]
23    fn parse(rdata: &RData<'a>, i: &mut usize) -> Result<Self, DnsMessageError> {
24        let key_tag = u16::parse(rdata.buffer, i)?;
25        let algorithm = u8::parse(rdata.buffer, i)?;
26        let digest_type = u8::parse(rdata.buffer, i)?;
27        let digest = Characters::parse(rdata.buffer, i)?;
28
29        Ok(Ds {
30            key_tag,
31            algorithm,
32            digest_type,
33            digest,
34        })
35    }
36}
37
38impl<'a> WriteBytes for Ds<'a> {
39    #[inline]
40    fn write<
41        const PTR_STORAGE: usize,
42        const DNS_SECTION: usize,
43        B: MutBuffer + Buffer,
44    >(&self, message: &mut DnsMessage<PTR_STORAGE, DNS_SECTION, B>) -> Result<usize, DnsMessageError> {
45        let mut bytes = 0;
46
47        bytes += self.key_tag.write(message)?;
48        bytes += self.algorithm.write(message)?;
49        bytes += self.digest_type.write(message)?;
50        bytes += self.digest.write(message)?;
51
52        Ok(bytes)
53    }
54}
55
56#[cfg(test)]
57mod test {
58    use crate::rdata::testutils::parse_write_test;
59
60    use super::*;
61
62    parse_write_test!(
63        8,
64        [
65            0x0c, 0x07, // key tag
66            0x83, // algorithm
67            0x73, // digest type
68            0x03, // digest len
69            b'w', b'w', b'w', // digest
70        ],
71        Ds {
72            key_tag: 0x0c07,
73            algorithm: 0x83,
74            digest_type: 0x73,
75            digest: unsafe { Characters::new_unchecked(b"www") },
76        },
77    );
78}
flex_dns/rdata/ds.rs

flex_dns/rdata/
ds.rs
