dns_server/
dns_op_code.rs

1/// > `OPCODE`  A four bit field that specifies kind of query in this message.
2/// >         This value is set by the originator of a query and copied into
3/// >         the response.  The values are:
4/// > - `0` a standard query (`QUERY`)
5/// > - `1` an inverse query (`IQUERY`)
6/// > - `2` a server status request (`STATUS`)
7/// > - `3-15` reserved for future use
8///
9/// <https://datatracker.ietf.org/doc/html/rfc1035#section-4.1.1>
10#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
11pub enum DnsOpCode {
12    Query,
13    InverseQuery,
14    Status,
15    Reserved(u8),
16}
17impl DnsOpCode {
18    #[must_use]
19    pub fn new(value: u8) -> Self {
20        match value {
21            0 => DnsOpCode::Query,
22            1 => DnsOpCode::InverseQuery,
23            2 => DnsOpCode::Status,
24            other => DnsOpCode::Reserved(other),
25        }
26    }
27
28    #[must_use]
29    pub fn num(&self) -> u8 {
30        match self {
31            DnsOpCode::Query => 0,
32            DnsOpCode::InverseQuery => 1,
33            DnsOpCode::Status => 2,
34            DnsOpCode::Reserved(other) => *other,
35        }
36    }
37}
dns_server/dns_op_code.rs

dns_server/
dns_op_code.rs
