forked from hickory-dns/hickory-dns
/
mod.rs
111 lines (94 loc) · 2.96 KB
/
mod.rs
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/*
* Copyright (C) 2015 Benjamin Fry <benjaminfry@me.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//! Binary serialization types
mod decoder;
mod encoder;
mod restrict;
pub use self::decoder::{BinDecoder, DecodeError};
pub use self::encoder::BinEncoder;
pub use self::encoder::EncodeMode;
pub use self::restrict::{Restrict, RestrictedMath, Verified};
#[cfg(test)]
pub mod bin_tests;
use crate::error::*;
/// A type which can be encoded into a DNS binary format
pub trait BinEncodable {
/// Write the type to the stream
fn emit(&self, encoder: &mut BinEncoder<'_>) -> ProtoResult<()>;
/// Returns the object in binary form
fn to_bytes(&self) -> ProtoResult<Vec<u8>> {
let mut bytes = Vec::<u8>::new();
{
let mut encoder = BinEncoder::new(&mut bytes);
self.emit(&mut encoder)?;
}
Ok(bytes)
}
}
/// A trait for types which are serializable to and from DNS binary formats
pub trait BinDecodable<'r>: Sized {
/// Read the type from the stream
fn read(decoder: &mut BinDecoder<'r>) -> ProtoResult<Self>;
/// Returns the object in binary form
fn from_bytes(bytes: &'r [u8]) -> ProtoResult<Self> {
let mut decoder = BinDecoder::new(bytes);
Self::read(&mut decoder)
}
}
impl BinEncodable for u16 {
fn emit(&self, encoder: &mut BinEncoder<'_>) -> ProtoResult<()> {
encoder.emit_u16(*self)
}
}
impl<'r> BinDecodable<'r> for u16 {
fn read(decoder: &mut BinDecoder<'_>) -> ProtoResult<Self> {
decoder
.read_u16()
.map(Restrict::unverified)
.map_err(Into::into)
}
}
impl BinEncodable for i32 {
fn emit(&self, encoder: &mut BinEncoder<'_>) -> ProtoResult<()> {
encoder.emit_i32(*self)
}
}
impl<'r> BinDecodable<'r> for i32 {
fn read(decoder: &mut BinDecoder<'_>) -> ProtoResult<i32> {
decoder
.read_i32()
.map(Restrict::unverified)
.map_err(Into::into)
}
}
impl BinEncodable for u32 {
fn emit(&self, encoder: &mut BinEncoder<'_>) -> ProtoResult<()> {
encoder.emit_u32(*self)
}
}
impl<'r> BinDecodable<'r> for u32 {
fn read(decoder: &mut BinDecoder<'_>) -> ProtoResult<Self> {
decoder
.read_u32()
.map(Restrict::unverified)
.map_err(Into::into)
}
}
impl BinEncodable for Vec<u8> {
fn emit(&self, encoder: &mut BinEncoder<'_>) -> ProtoResult<()> {
encoder.emit_vec(self)
}
}