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use byteorder::{ByteOrder, NativeEndian};
use {Field, Index, NlaBuffer, NlasIterator, Rest, Result};
const FAMILY: Index = 0;
const PREFIX_LEN: Index = 1;
const FLAGS: Index = 2;
const SCOPE: Index = 3;
const INDEX: Field = 4..8;
const ATTRIBUTES: Rest = 8..;
pub const ADDRESS_HEADER_LEN: usize = ATTRIBUTES.start;
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct AddressBuffer<T> {
buffer: T,
}
impl<T: AsRef<[u8]>> AddressBuffer<T> {
pub fn new(buffer: T) -> AddressBuffer<T> {
AddressBuffer { buffer }
}
pub fn into_inner(self) -> T {
self.buffer
}
pub fn family(&self) -> u8 {
let data = self.buffer.as_ref();
data[FAMILY]
}
pub fn prefix_len(&self) -> u8 {
let data = self.buffer.as_ref();
data[PREFIX_LEN]
}
pub fn flags(&self) -> u8 {
let data = self.buffer.as_ref();
data[FLAGS]
}
pub fn scope(&self) -> u8 {
let data = self.buffer.as_ref();
data[SCOPE]
}
pub fn index(&self) -> u32 {
let data = self.buffer.as_ref();
NativeEndian::read_u32(&data[INDEX])
}
}
impl<'a, T: AsRef<[u8]> + ?Sized> AddressBuffer<&'a T> {
pub fn payload(&self) -> &'a [u8] {
let data = self.buffer.as_ref();
&data[ATTRIBUTES]
}
pub fn nlas(&self) -> impl Iterator<Item = Result<NlaBuffer<&'a [u8]>>> {
NlasIterator::new(self.payload())
}
}
impl<'a, T: AsRef<[u8]> + AsMut<[u8]> + ?Sized> AddressBuffer<&'a mut T> {
pub fn payload_mut(&mut self) -> &mut [u8] {
let data = self.buffer.as_mut();
&mut data[ATTRIBUTES]
}
}
impl<T: AsRef<[u8]> + AsMut<[u8]>> AddressBuffer<T> {
pub fn set_family(&mut self, value: u8) {
let data = self.buffer.as_mut();
data[FAMILY] = value
}
pub fn set_prefix_len(&mut self, value: u8) {
let data = self.buffer.as_mut();
data[PREFIX_LEN] = value
}
pub fn set_flags(&mut self, value: u8) {
let data = self.buffer.as_mut();
data[FLAGS] = value
}
pub fn set_scope(&mut self, value: u8) {
let data = self.buffer.as_mut();
data[SCOPE] = value
}
pub fn set_index(&mut self, value: u32) {
let data = self.buffer.as_mut();
NativeEndian::write_u32(&mut data[INDEX], value)
}
}