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#[derive(Debug, Clone, FromPrimitive, ToPrimitive, PartialEq)]
pub enum Opcode {
    Query = 0,
    IQuery = 1,
    Status = 2,

    Notify = 4,
    Update = 5,
    DSO = 6,
}

#[derive(Debug, Clone, FromPrimitive, ToPrimitive, PartialEq)]
pub enum RCode {
    NoError = 0,
    FormErr = 1,
    ServFail = 2,
    NXDomain = 3,
    NotImp = 4,
    Refused = 5,
    YXDomain = 6,
    YXRRSet = 7,
    NXRRSet = 8,
    NotAuth = 9,
    NotZone = 10,
    DSOTYPENI = 11,

    BADVERS = 16,
    BADKEY = 17,
    BADTIME = 18,
    BADMODE = 19,
    BADNAME = 20,
    BADALG = 21,
    BADTRUNC = 22,
    BADCOOKIE = 23,
}