netlink_packet_generic/
header.rs

1// SPDX-License-Identifier: MIT
2
3//! header definition of generic netlink packet
4use crate::buffer::GenlBuffer;
5use crate::constants::GENL_HDRLEN;
6use netlink_packet_utils::{DecodeError, Emitable, Parseable};
7
8/// Generic Netlink header
9#[derive(Clone, Copy, Debug, PartialEq, Eq)]
10pub struct GenlHeader {
11    pub cmd: u8,
12    pub version: u8,
13}
14
15impl Emitable for GenlHeader {
16    fn buffer_len(&self) -> usize {
17        GENL_HDRLEN
18    }
19
20    fn emit(&self, buffer: &mut [u8]) {
21        let mut packet = GenlBuffer::new(buffer);
22        packet.set_cmd(self.cmd);
23        packet.set_version(self.version);
24    }
25}
26
27impl<T: AsRef<[u8]>> Parseable<GenlBuffer<T>> for GenlHeader {
28    type Error = DecodeError;
29    fn parse(buf: &GenlBuffer<T>) -> Result<Self, DecodeError> {
30        Ok(Self { cmd: buf.cmd(), version: buf.version() })
31    }
32}