代码拉取完成,页面将自动刷新
use std::marker::PhantomData;
use std::net::Ipv4Addr;
use jppe_derive::{BorrowByteDecode, BorrowByteEncode};
use jppe::prelude::MacAddress;
#[derive(Debug, PartialEq, Eq, BorrowByteEncode, BorrowByteDecode)]
pub struct Layer<'a> {
pub layer12: EthernetHeader<'a>,
#[jppe(branch="layer12.r#type")]
pub layer3: Layer3<'a>,
#[jppe(branch="layer3.get_protocol().unwrap_or_default()")]
pub layer4: Layer4<'a>,
pub remain: &'a [u8],
}
#[derive(Debug, PartialEq, Eq, BorrowByteEncode, BorrowByteDecode)]
pub enum Layer3<'a> {
#[jppe(branch_value=0x0800)]
Ipv4(Ipv4Header<'a>),
#[jppe(branch_default)]
Unknown,
}
impl<'a> Layer3<'a> {
pub fn get_protocol(&self) -> Option<u8> {
match self {
Self::Ipv4(v) => Some(v.protocol),
_ => None,
}
}
}
#[derive(Debug, PartialEq, Eq, BorrowByteEncode, BorrowByteDecode)]
pub enum Layer4<'a> {
#[jppe(branch_value=6)]
Tcp(TcpHeader<'a>),
#[jppe(branch_value=17)]
Udp(UdpHeader<'a>),
#[jppe(branch_default)]
Unknown,
}
#[derive(Debug, PartialEq, Eq, BorrowByteEncode, BorrowByteDecode)]
pub struct EthernetHeader<'a> {
pub smac: MacAddress,
pub dmac: MacAddress,
pub r#type: u16,
_mark: PhantomData<&'a ()>,
}
#[derive(Debug, PartialEq, Eq, BorrowByteEncode, BorrowByteDecode)]
pub struct Ipv4Header<'a> {
#[jppe(bits_start=0xf0, untake)]
pub version: u8,
#[jppe(bits=0x0f, value_decode="header_length << 2", value_encode="header_length >> 2")]
pub header_length: u8,
pub tos: u8,
pub total_length: u16,
pub identification: u16,
#[jppe(bits_start=0xe000, untake)]
pub flags: u16,
#[jppe(bits=0x1fff)]
pub fragment_offset: u16,
pub ttl: u8,
pub protocol: u8,
pub checksum: u16,
pub src: Ipv4Addr,
pub dst: Ipv4Addr,
#[jppe(length="header_length - 20")]
pub options: &'a [u8],
}
#[derive(Debug, Default, PartialEq, Eq, BorrowByteEncode, BorrowByteDecode)]
pub struct TcpHeader<'a> {
pub sport: u16,
pub dport: u16,
pub seq: u32,
pub ack: u32,
#[jppe(bits_start=0xf000, value_decode="header_length * 4", value_encode="header_length / 4", untake)]
pub header_length: u16,
#[jppe(bits=0x0fff)]
pub flags: u16,
pub window: u16,
pub checksum: u16,
pub urgent_pointer: u16,
#[jppe(length="header_length - 20")]
pub options: &'a [u8],
}
#[derive(Debug, Default, PartialEq, Eq, BorrowByteEncode, BorrowByteDecode)]
pub struct UdpHeader<'a> {
pub sport: u16,
pub dport: u16,
pub length: u16,
pub checksum: u16,
_mark: PhantomData<&'a ()>,
}
fn main() {
let input = b"\x00\xc0\x9f\x32\x41\x8c\x00\xe0\x18\xb1\x0c\xad\x08\x00\x45\x00\
\x00\x38\x00\x00\x40\x00\x40\x11\x65\x47\xc0\xa8\xaa\x08\xc0\xa8\
\xaa\x14\x80\x1b\x00\x35\x00\x24\x85\xed\x10\x32\x01\x00\x00\x01\
\x00\x00\x00\x00\x00\x00\x06\x67\x6f\x6f\x67\x6c\x65\x03\x63\x6f\
\x6d\x00\x00\x10\x00\x01";
let (_, value) = jppe::decode_borrow::<Layer<'_>>(input).unwrap();
println!(">>> {value:?}");
assert_eq!(jppe::encode_borrow(value), input);
}
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。