1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
use crate::constants::*;
use anyhow::Context;
use byteorder::{ByteOrder, NativeEndian};
use netlink_packet_utils::{
nla::{Nla, NlaBuffer},
parsers::*,
traits::*,
DecodeError,
};
use std::mem::size_of_val;
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum OpAttrs {
Id(u32),
Flags(u32),
}
impl Nla for OpAttrs {
fn value_len(&self) -> usize {
use OpAttrs::*;
match self {
Id(v) => size_of_val(v),
Flags(v) => size_of_val(v),
}
}
fn kind(&self) -> u16 {
use OpAttrs::*;
match self {
Id(_) => CTRL_ATTR_OP_ID,
Flags(_) => CTRL_ATTR_OP_FLAGS,
}
}
fn emit_value(&self, buffer: &mut [u8]) {
use OpAttrs::*;
match self {
Id(v) => NativeEndian::write_u32(buffer, *v),
Flags(v) => NativeEndian::write_u32(buffer, *v),
}
}
}
impl<'a, T: AsRef<[u8]> + ?Sized> Parseable<NlaBuffer<&'a T>> for OpAttrs {
fn parse(buf: &NlaBuffer<&'a T>) -> Result<Self, DecodeError> {
let payload = buf.value();
Ok(match buf.kind() {
CTRL_ATTR_OP_ID => Self::Id(
parse_u32(payload).context("invalid CTRL_ATTR_OP_ID value")?,
),
CTRL_ATTR_OP_FLAGS => Self::Flags(
parse_u32(payload)
.context("invalid CTRL_ATTR_OP_FLAGS value")?,
),
kind => {
return Err(DecodeError::from(format!(
"Unknown NLA type: {kind}"
)))
}
})
}
}