netlink_packet_route/link/
down_reason.rs

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1// SPDX-License-Identifier: MIT
2
3use anyhow::Context;
4use byteorder::{ByteOrder, NativeEndian};
5use netlink_packet_utils::nla::{DefaultNla, Nla, NlaBuffer};
6use netlink_packet_utils::parsers::parse_u32;
7use netlink_packet_utils::{DecodeError, Parseable};
8
9const IFLA_PROTO_DOWN_REASON_MASK: u16 = 1;
10const IFLA_PROTO_DOWN_REASON_VALUE: u16 = 2;
11
12#[derive(Debug, PartialEq, Eq, Clone)]
13#[non_exhaustive]
14pub enum LinkProtocolDownReason {
15    Value(u32),
16    Mask(u32),
17    Other(DefaultNla),
18}
19
20impl<'a, T: AsRef<[u8]> + ?Sized> Parseable<NlaBuffer<&'a T>> for LinkProtocolDownReason {
21    type Error = DecodeError;
22    fn parse(buf: &NlaBuffer<&'a T>) -> Result<Self, DecodeError> {
23        let payload = buf.value();
24        Ok(match buf.kind() {
25            IFLA_PROTO_DOWN_REASON_MASK => Self::Mask(
26                parse_u32(payload)
27                    .context(format!("invalid IFLA_PROTO_DOWN_REASON_MASK {payload:?}"))?,
28            ),
29            IFLA_PROTO_DOWN_REASON_VALUE => Self::Value(
30                parse_u32(payload)
31                    .context(format!("invalid IFLA_PROTO_DOWN_REASON_MASK {payload:?}"))?,
32            ),
33            kind => Self::Other(DefaultNla::parse(buf).context(format!(
34                "unknown NLA type {kind} for IFLA_PROTO_DOWN_REASON: \
35                {payload:?}"
36            ))?),
37        })
38    }
39}
40
41impl Nla for LinkProtocolDownReason {
42    fn kind(&self) -> u16 {
43        match self {
44            Self::Value(_) => IFLA_PROTO_DOWN_REASON_VALUE,
45            Self::Mask(_) => IFLA_PROTO_DOWN_REASON_MASK,
46            Self::Other(v) => v.kind(),
47        }
48    }
49
50    fn value_len(&self) -> usize {
51        match self {
52            Self::Value(_) | Self::Mask(_) => 4,
53            Self::Other(v) => v.value_len(),
54        }
55    }
56
57    fn emit_value(&self, buffer: &mut [u8]) {
58        match self {
59            Self::Value(v) | Self::Mask(v) => NativeEndian::write_u32(buffer, *v),
60            Self::Other(v) => v.emit_value(buffer),
61        }
62    }
63}
netlink_packet_route/link/down_reason.rs

netlink_packet_route/link/
down_reason.rs
