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use std::fmt;
use crate::error::*;
use crate::packet::{Packet as P, PacketMut as PM, AsPacket, AsPacketMut};
#[derive(Clone)]
pub struct Packet<B> {
buffer: B,
}
sized!(Packet,
header {
min: 0,
max: 0,
size: 0,
}
payload {
min: 0,
max: 0,
size: 0,
});
impl<B: AsRef<[u8]>> fmt::Debug for Packet<B> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("ip::v6::Packet")
.finish()
}
}
impl<B: AsRef<[u8]>> Packet<B> {
pub fn unchecked(buffer: B) -> Packet<B> {
Packet { buffer }
}
pub fn no_payload(buffer: B) -> Result<Packet<B>> {
use crate::size::header::Min;
let packet = Packet::unchecked(buffer);
if packet.buffer.as_ref().len() < Self::min() {
Err(Error::SmallBuffer)?
}
if packet.buffer.as_ref()[0] >> 4 != 6 {
Err(Error::InvalidPacket)?
}
Ok(packet)
}
pub fn new(buffer: B) -> Result<Packet<B>> {
Packet::no_payload(buffer)
}
}
impl<B: AsRef<[u8]>> Packet<B> {
pub fn to_owned(&self) -> Packet<Vec<u8>> {
Packet::unchecked(self.buffer.as_ref().to_vec())
}
}
impl<B: AsRef<[u8]>> AsRef<[u8]> for Packet<B> {
fn as_ref(&self) -> &[u8] {
&[]
}
}
impl<B: AsRef<[u8]> + AsMut<[u8]>> AsMut<[u8]> for Packet<B> {
fn as_mut(&mut self) -> &mut [u8] {
&mut []
}
}
impl<'a, B: AsRef<[u8]>> AsPacket<'a, Packet<&'a [u8]>> for B {
fn as_packet(&self) -> Result<Packet<&[u8]>> {
Packet::new(self.as_ref())
}
}
impl<'a, B: AsRef<[u8]> + AsMut<[u8]>> AsPacketMut<'a, Packet<&'a mut [u8]>> for B {
fn as_packet_mut(&mut self) -> Result<Packet<&mut [u8]>> {
Packet::new(self.as_mut())
}
}
impl<B: AsRef<[u8]>> P for Packet<B> {
fn split(&self) -> (&[u8], &[u8]) {
(&[], &[])
}
}
impl<B: AsRef<[u8]> + AsMut<[u8]>> PM for Packet<B> {
fn split_mut(&mut self) -> (&mut [u8], &mut [u8]) {
(&mut [], &mut [])
}
}