netlink_packet_route/rtnl/link/nlas/
prop_list.rs

1// SPDX-License-Identifier: MIT
2
3use anyhow::Context;
4use netlink_packet_utils::{
5    nla::{DefaultNla, Nla, NlaBuffer},
6    parsers::parse_string,
7    traits::Parseable,
8    DecodeError,
9};
10
11use crate::constants::*;
12
13#[derive(Debug, PartialEq, Eq, Clone)]
14#[non_exhaustive]
15pub enum Prop {
16    AltIfName(String),
17    Other(DefaultNla),
18}
19
20impl Nla for Prop {
21    #[rustfmt::skip]
22    fn value_len(&self) -> usize {
23        use self::Prop::*;
24        match self {
25            AltIfName(ref string) => string.as_bytes().len() + 1,
26            Other(nla) => nla.value_len()
27        }
28    }
29
30    #[rustfmt::skip]
31    fn emit_value(&self, buffer: &mut [u8]) {
32        use self::Prop::*;
33        match self {
34            AltIfName(ref string) => {
35                buffer[..string.len()].copy_from_slice(string.as_bytes());
36                buffer[string.len()] = 0;
37            },
38            Other(nla) => nla.emit_value(buffer)
39        }
40    }
41
42    fn kind(&self) -> u16 {
43        use self::Prop::*;
44        match self {
45            AltIfName(_) => IFLA_ALT_IFNAME,
46            Other(nla) => nla.kind(),
47        }
48    }
49}
50
51impl<'a, T: AsRef<[u8]> + ?Sized> Parseable<NlaBuffer<&'a T>> for Prop {
52    fn parse(buf: &NlaBuffer<&'a T>) -> Result<Self, DecodeError> {
53        let payload = buf.value();
54        Ok(match buf.kind() {
55            IFLA_ALT_IFNAME => Prop::AltIfName(
56                parse_string(payload)
57                    .context("invalid IFLA_ALT_IFNAME value")?,
58            ),
59            kind => Prop::Other(
60                DefaultNla::parse(buf)
61                    .context(format!("Unknown NLA type {kind}"))?,
62            ),
63        })
64    }
65}
netlink_packet_route/rtnl/link/nlas/prop_list.rs

netlink_packet_route/rtnl/link/nlas/
prop_list.rs
