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

use crate::parser::bgp::messages::parse_bgp_update_message;
use crate::parser::bmp::error::ParserBmpError;
use crate::parser::ReadUtils;
use bgp_models::prelude::*;
use num_traits::FromPrimitive;
use std::io::Cursor;

#[derive(Debug)]
pub struct RouteMirroring {
    pub tlvs: Vec<RouteMirroringTlv>,
}

#[derive(Debug)]
pub struct RouteMirroringTlv {
    pub info_len: u16,
    pub value: RouteMirroringValue,
}

#[derive(Debug)]
pub enum RouteMirroringValue {
    BgpMessage(BgpUpdateMessage),
    Information(RouteMirroringInfo),
}

#[derive(Debug, Primitive)]
pub enum RouteMirroringInfo {
    ErroredPdu = 0,
    MessageLost = 1,
}

pub fn parse_route_mirroring(
    reader: &mut Cursor<&[u8]>,
    asn_len: &AsnLength,
) -> Result<RouteMirroring, ParserBmpError> {
    let mut tlvs = vec![];
    while reader.get_ref().len() - (reader.position() as usize) > 4 {
        match reader.read_16b()? {
            0 => {
                let info_len = reader.read_16b()?;
                let bytes = reader.read_n_bytes(info_len as usize)?;
                let mut reader = Cursor::new(bytes.as_slice());
                let value = parse_bgp_update_message(&mut reader, false, asn_len, info_len as u64)?;
                tlvs.push(RouteMirroringTlv {
                    info_len,
                    value: RouteMirroringValue::BgpMessage(value),
                });
            }
            1 => {
                let info_len = reader.read_16b()?;
                let value = RouteMirroringInfo::from_u16(reader.read_16b()?).unwrap();
                tlvs.push(RouteMirroringTlv {
                    info_len,
                    value: RouteMirroringValue::Information(value),
                });
            }
            _ => return Err(ParserBmpError::CorruptedBmpMessage),
        }
    }
    Ok(RouteMirroring { tlvs })
}