bgpkit-parser 0.9.0-alpha-3

A library to parse MRT/BGP/BMP binary data.
Documentation 
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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150

use crate::parser::bgp::parse_bgp_message;
use crate::parser::rislive::error::ParserRisliveError;
use crate::{BgpElem, Elementor};
use bgp_models::mrt::{Bgp4MpType, CommonHeader, EntryType, MrtMessage, MrtRecord};
use bgp_models::network::{Afi, AsnLength};
use serde_json::Value;
use std::net::IpAddr;
use std::str::FromStr;

pub fn parse_raw_bytes(msg_str: &str) -> Result<Vec<BgpElem>, ParserRisliveError> {
    let msg: Value = serde_json::from_str(msg_str)?;
    let msg_type = match msg.get("type") {
        None => return Err(ParserRisliveError::IrregularRisLiveFormat),
        Some(t) => t.as_str().unwrap(),
    };

    match msg_type {
        "ris_message" => {}
        "ris_error" | "ris_rrc_list" | "ris_subscribe_ok" | "pong" => {
            return Err(ParserRisliveError::UnsupportedMessage)
        }
        _ => return Err(ParserRisliveError::IrregularRisLiveFormat),
    }

    let data = msg.get("data").unwrap().as_object().unwrap();

    let bytes = hex::decode(data.get("raw").unwrap().as_str().unwrap()).unwrap();

    let timestamp = data.get("timestamp").unwrap().as_f64().unwrap();
    let peer_str = data.get("peer").unwrap().as_str().unwrap().to_owned();

    let peer_ip = peer_str.parse::<IpAddr>().unwrap();
    let afi = match peer_ip.is_ipv4() {
        true => Afi::Ipv4,
        false => Afi::Ipv6,
    };

    let peer_asn_str = data.get("peer_asn").unwrap().as_str().unwrap().to_owned();

    let peer_asn = peer_asn_str.parse::<i32>().unwrap().into();

    let bgp_msg = match parse_bgp_message(bytes.as_slice(), false, &AsnLength::Bits32) {
        Ok(m) => m,
        Err(_) => match parse_bgp_message(bytes.as_slice(), false, &AsnLength::Bits16) {
            Ok(m) => m,
            Err(_) => return Err(ParserRisliveError::IncorrectRawBytes),
        },
    };

    let t_sec = timestamp as u32;
    let t_msec = get_micro_seconds(timestamp);

    let header = CommonHeader {
        timestamp: t_sec,
        microsecond_timestamp: Some(t_msec),
        entry_type: EntryType::BGP4MP,
        entry_subtype: 4, // Bgp4MpMessageAs4
        length: 0,
    };

    let record = MrtRecord {
        common_header: header,
        message: MrtMessage::Bgp4Mp(bgp_models::mrt::bgp4mp::Bgp4Mp::Bgp4MpMessage(
            bgp_models::mrt::bgp4mp::Bgp4MpMessage {
                msg_type: Bgp4MpType::Bgp4MpMessageAs4,
                peer_asn,
                local_asn: 0.into(),
                interface_index: 0,
                afi,
                peer_ip,
                local_ip: IpAddr::from_str("0.0.0.0").unwrap(),
                bgp_message: bgp_msg,
            },
        )),
    };
    Ok(Elementor::new().record_to_elems(record))
}

fn get_micro_seconds(sec: f64) -> u32 {
    format!("{:.6}", sec).split('.').collect::<Vec<&str>>()[1]
        .to_owned()
        .parse::<u32>()
        .unwrap()
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn ris_live_message() {
        let message = r#"
        {
  "type": "ris_message",
  "data": {
    "timestamp": 1636245154.8,
    "peer": "2001:7f8:b:100:1d1:a520:1333:74",
    "peer_asn": "201333",
    "id": "10-183678-175313836",
    "host": "rrc10",
    "type": "UPDATE",
    "path": [
      201333,
      6762,
      174,
      20473
    ],
    "community": [
      [
        6762,
        30
      ],
      [
        6762,
        14400
      ]
    ],
    "origin": "igp",
    "announcements": [
      {
        "next_hop": "2001:7f8:b:100:1d1:a520:1333:74",
        "prefixes": [
          "2a0e:97c7::/48",
          "2a0e:97c6:fe::/48",
          "2a10:cc42:17b7::/48",
          "2a10:cc42:1feb::/48"
        ]
      },
      {
        "next_hop": "fe80::217:a3ff:fefe:2905",
        "prefixes": [
          "2a0e:97c7::/48",
          "2a0e:97c6:fe::/48",
          "2a10:cc42:17b7::/48",
          "2a10:cc42:1feb::/48"
        ]
      }
    ],
    "raw": "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0086020000006F4001010040021202040003127500001A6A000000AE00004FF980040400000000C008081A6A001E1A6A3840800E4100020120200107F8000B010001D1A52013330074FE800000000000000217A3FFFEFE290500302A0E97C70000302A0E97C600FE302A10CC4217B7302A10CC421FEB"
  }
}
        "#;

        let res = parse_raw_bytes(message);
        dbg!(&res);
        for elem in res.unwrap() {
            println!("{}", elem);
        }
    }
}