bgpkit-parser 0.9.0-alpha-1

A library to parse MRT/BGP/BMP binary data.
Documentation 
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use std::net::IpAddr;
use std::str::FromStr;
use bgp_models::mrt::{Bgp4MpType, CommonHeader, EntryType, MrtMessage, MrtRecord};
use bgp_models::network::{Afi, AsnLength};
use serde_json::Value;
use crate::{BgpElem, Elementor};
use crate::parser::bgp::parse_bgp_message;
use crate::parser::DataBytes;
use crate::parser::rislive::error::ParserRisliveError;

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 mut data_bytes = DataBytes::new(&bytes);

    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(&mut data_bytes, false, &AsnLength::Bits32, 40960) {
        Ok(m) => {m}
        Err(_) => {
            match parse_bgp_message(&mut data_bytes, false, &AsnLength::Bits16, 40960) {
                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);
        }
    }
}