flex_dns/rdata/
dlv.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/// # DNSSEC lookaside validation record (DLV)
8/// This record is used to publish the public key of a DNSSEC lookaside validation
9/// (DLV) trust anchor.
10#[derive(Copy, Clone, Debug, PartialEq)]
11pub struct Dlv<'a> {
12    /// key_tag is a mechanism for quickly identifying the signing key in a zone
13    pub key_tag: u16,
14    /// algorithm is the algorithm of the key
15    pub algorithm: u8,
16    /// digest_type is the algorithm used to construct the digest
17    pub digest_type: u8,
18    /// digest is the digest of the public key
19    pub digest: Characters<'a>,
20}
21
22impl<'a> RDataParse<'a> for Dlv<'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 Dlv<'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        8,
65        [
66            0x00, 0x0e, // key_tag
67            0x03, // algorithm
68            0x03, // digest_type
69            0x03, // digest len
70            b'w', b'w', b'w', // digest
71        ],
72        Dlv {
73            key_tag: 14,
74            algorithm: 3,
75            digest_type: 3,
76            digest: unsafe { Characters::new_unchecked(b"www") },
77        },
78    );
79}
flex_dns/rdata/dlv.rs

flex_dns/rdata/
dlv.rs
