use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
use no_std_io::io::{Read, Write};
use crate::reader::Reader;
use crate::writer::Writer;
use crate::{DekuError, DekuReader, DekuWriter};
impl<'a, Ctx> DekuReader<'a, Ctx> for Ipv4Addr
where
u32: DekuReader<'a, Ctx>,
{
fn from_reader_with_ctx<R: Read>(
reader: &mut Reader<R>,
inner_ctx: Ctx,
) -> Result<Self, DekuError> {
let ip = u32::from_reader_with_ctx(reader, inner_ctx)?;
Ok(ip.into())
}
}
impl<Ctx> DekuWriter<Ctx> for Ipv4Addr
where
u32: DekuWriter<Ctx>,
{
fn to_writer<W: Write>(&self, writer: &mut Writer<W>, ctx: Ctx) -> Result<(), DekuError> {
let ip: u32 = (*self).into();
ip.to_writer(writer, ctx)
}
}
impl<'a, Ctx> DekuReader<'a, Ctx> for Ipv6Addr
where
u128: DekuReader<'a, Ctx>,
{
fn from_reader_with_ctx<R: Read>(
reader: &mut Reader<R>,
inner_ctx: Ctx,
) -> Result<Self, DekuError> {
let ip = u128::from_reader_with_ctx(reader, inner_ctx)?;
Ok(ip.into())
}
}
impl<Ctx> DekuWriter<Ctx> for Ipv6Addr
where
u128: DekuWriter<Ctx>,
{
fn to_writer<W: Write>(&self, writer: &mut Writer<W>, ctx: Ctx) -> Result<(), DekuError> {
let ip: u128 = (*self).into();
ip.to_writer(writer, ctx)
}
}
impl<Ctx> DekuWriter<Ctx> for IpAddr
where
Ipv6Addr: DekuWriter<Ctx>,
Ipv4Addr: DekuWriter<Ctx>,
{
fn to_writer<W: Write>(&self, writer: &mut Writer<W>, ctx: Ctx) -> Result<(), DekuError> {
match self {
IpAddr::V4(ipv4) => ipv4.to_writer(writer, ctx),
IpAddr::V6(ipv6) => ipv6.to_writer(writer, ctx),
}
}
}
#[cfg(test)]
mod tests {
use no_std_io::io::Cursor;
use rstest::rstest;
use super::*;
use crate::{ctx::Endian, reader::Reader};
#[rstest(input, endian, expected,
case::normal_le([237, 160, 254, 145].as_ref(), Endian::Little, Ipv4Addr::new(145, 254, 160, 237)),
case::normal_be([145, 254, 160, 237].as_ref(), Endian::Big, Ipv4Addr::new(145, 254, 160, 237)),
)]
fn test_ipv4(input: &[u8], endian: Endian, expected: Ipv4Addr) {
let mut cursor = Cursor::new(input);
let mut reader = Reader::new(&mut cursor);
let res_read = Ipv4Addr::from_reader_with_ctx(&mut reader, endian).unwrap();
assert_eq!(expected, res_read);
let mut writer = Writer::new(vec![]);
res_read.to_writer(&mut writer, endian).unwrap();
assert_eq!(input.to_vec(), writer.inner);
}
#[rstest(input, endian, expected,
case::normal_le([0xFF, 0x02, 0x0A, 0xC0, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00].as_ref(), Endian::Little, Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x02ff)),
case::normal_be([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xC0, 0x0A, 0x02, 0xFF].as_ref(), Endian::Big, Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x02ff)),
)]
fn test_ipv6(input: &[u8], endian: Endian, expected: Ipv6Addr) {
let mut cursor = Cursor::new(input);
let mut reader = Reader::new(&mut cursor);
let res_read = Ipv6Addr::from_reader_with_ctx(&mut reader, endian).unwrap();
assert_eq!(expected, res_read);
let mut writer = Writer::new(vec![]);
res_read.to_writer(&mut writer, endian).unwrap();
assert_eq!(input.to_vec(), writer.inner);
}
#[test]
fn test_ip_addr_write() {
let ip_addr = IpAddr::V4(Ipv4Addr::new(145, 254, 160, 237));
let mut writer = Writer::new(vec![]);
ip_addr.to_writer(&mut writer, Endian::Little).unwrap();
assert_eq!(vec![237, 160, 254, 145], writer.inner);
let ip_addr = IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x02ff));
let mut writer = Writer::new(vec![]);
ip_addr.to_writer(&mut writer, Endian::Little).unwrap();
assert_eq!(
vec![
0xff, 0x02, 0x0a, 0xc0, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00
],
writer.inner
);
}
}