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//! Data types and methods for handling the RData field
#![allow(missing_docs)] // resource records are pretty self-descriptive
pub mod a;
pub mod aaaa;
pub mod all;
pub mod axfr;
pub mod cname;
pub mod hinfo;
pub mod maila;
pub mod mailb;
pub mod mb;
pub mod mf;
pub mod mg;
pub mod minfo;
pub mod mr;
pub mod mx;
pub mod ns;
pub mod nsec;
pub mod null;
pub mod opt;
pub mod ptr;
pub mod soa;
pub mod srv;
pub mod txt;
pub mod wks;
use {Type, Error};
pub use self::a::Record as A;
pub use self::aaaa::Record as Aaaa;
pub use self::cname::Record as Cname;
pub use self::mx::Record as Mx;
pub use self::ns::Record as Ns;
pub use self::nsec::Record as Nsec;
pub use self::opt::Record as Opt;
pub use self::ptr::Record as Ptr;
pub use self::soa::Record as Soa;
pub use self::srv::Record as Srv;
pub use self::txt::Record as Txt;
pub type RDataResult<'a> = Result<RData<'a>, Error>;
/// The enumeration that represents known types of DNS resource records data
#[derive(Debug)]
pub enum RData<'a> {
A(A),
AAAA(Aaaa),
CNAME(Cname<'a>),
MX(Mx<'a>),
NS(Ns<'a>),
PTR(Ptr<'a>),
SOA(Soa<'a>),
SRV(Srv<'a>),
TXT(Txt<'a>),
/// Anything that can't be parsed yet
Unknown(&'a [u8]),
}
pub (crate) trait Record<'a> {
const TYPE: isize;
fn parse(rdata: &'a [u8], original: &'a [u8]) -> RDataResult<'a>;
}
impl<'a> RData<'a> {
/// Parse an RR data and return RData enumeration
pub fn parse(typ: Type, rdata: &'a [u8], original: &'a [u8]) -> RDataResult<'a> {
match typ {
Type::A => A::parse(rdata, original),
Type::AAAA => Aaaa::parse(rdata, original),
Type::CNAME => Cname::parse(rdata, original),
Type::NS => Ns::parse(rdata, original),
Type::MX => Mx::parse(rdata, original),
Type::PTR => Ptr::parse(rdata, original),
Type::SOA => Soa::parse(rdata, original),
Type::SRV => Srv::parse(rdata, original),
Type::TXT => Txt::parse(rdata, original),
_ => Ok(RData::Unknown(rdata)),
}
}
}