dns_server/
dns_response_code.rs

1/// > `RCODE` Response code - this 4 bit field is set as part of responses.  The values have the
2/// > following interpretation:
3/// > - `0` No error condition
4/// > - `1` Format error - The name server was unable to interpret the query.
5/// > - `2` Server failure - The name server was unable to process this query due to a problem with
6/// >   the name server.
7/// > - `3` Name Error - Meaningful only for responses from an authoritative name server, this code
8/// >   signifies that the domain name referenced in the query does not exist.
9/// > - `4` Not Implemented - The name server does not support the requested kind of query.
10/// > - `5` Refused - The name server refuses to perform the specified operation for policy reasons.
11/// >   For example, a name server may not wish to provide the information to the particular
12/// >   requester, or a name server may not wish to perform a particular operation (e.g., zone
13/// >    transfer) for particular data.
14/// > - `6-15` Reserved for future use.
15///
16/// <https://datatracker.ietf.org/doc/html/rfc1035#section-4.1.1>
17#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
18pub enum DnsResponseCode {
19    NoError,
20    FormatError,
21    ServerFailure,
22    NameError,
23    NotImplemented,
24    Refused,
25    Reserved(u8),
26}
27impl DnsResponseCode {
28    #[must_use]
29    pub fn new(value: u8) -> Self {
30        match value {
31            0 => DnsResponseCode::NoError,
32            1 => DnsResponseCode::FormatError,
33            2 => DnsResponseCode::ServerFailure,
34            3 => DnsResponseCode::NameError,
35            4 => DnsResponseCode::NotImplemented,
36            5 => DnsResponseCode::Refused,
37            other => DnsResponseCode::Reserved(other),
38        }
39    }
40
41    #[must_use]
42    pub fn num(&self) -> u8 {
43        match self {
44            DnsResponseCode::NoError => 0,
45            DnsResponseCode::FormatError => 1,
46            DnsResponseCode::ServerFailure => 2,
47            DnsResponseCode::NameError => 3,
48            DnsResponseCode::NotImplemented => 4,
49            DnsResponseCode::Refused => 5,
50            DnsResponseCode::Reserved(other) => *other,
51        }
52    }
53}
dns_server/dns_response_code.rs

dns_server/
dns_response_code.rs
