Crate bgpkit_parser 

BGPKIT Parser aims to provide the most ergonomic MRT/BGP/BMP message parsing Rust API.

BGPKIT Parser has the following features:

• performant: comparable to C-based implementations like bgpdump or bgpreader.
• actively maintained: we consistently introduce feature updates and bug fixes, and support most of the relevant BGP RFCs.
• ergonomic API: a three-line for loop can already get you started.
• battery-included: ready to handle remote or local, bzip2 or gz data files out of the box

Getting Started

Add bgpkit-parser to your Cargo.toml:

[dependencies]
bgpkit-parser = "0.12"

Parse a BGP MRT file in three lines:

use bgpkit_parser::BgpkitParser;

for elem in BgpkitParser::new("http://archive.routeviews.org/route-views4/bgpdata/2022.01/UPDATES/updates.20220101.0000.bz2").unwrap() {
    println!("{}", elem);
}

Examples

The examples below are organized by complexity. For complete runnable examples, check out the examples folder.

Basic Examples

Parsing a Single MRT File

Let’s say we want to print out all the BGP announcements/withdrawal from a single MRT file, either located remotely or locally. Here is an example that does so.

use bgpkit_parser::BgpkitParser;
let parser = BgpkitParser::new("http://archive.routeviews.org/bgpdata/2021.10/UPDATES/updates.20211001.0000.bz2").unwrap();
for elem in parser {
    println!("{}", elem)
}

Yes, it is this simple!

Counting BGP Messages

You can use iterator methods for quick analysis. For example, counting the number of announcements/withdrawals in a file:

use bgpkit_parser::BgpkitParser;
let url = "http://archive.routeviews.org/bgpdata/2021.10/UPDATES/updates.20211001.0000.bz2";
let count = BgpkitParser::new(url).unwrap().into_iter().count();
println!("total: {}", count);

Output:

total: 255849

Intermediate Examples

Filtering BGP Messages

BGPKIT Parser has a built-in Filter mechanism to efficiently filter messages. Add filters when creating the parser to only process matching BgpElems.

Available filter types: See the Filter enum documentation for all options.

use bgpkit_parser::BgpkitParser;

/// Filter by IP prefix
let parser = BgpkitParser::new("http://archive.routeviews.org/bgpdata/2021.10/UPDATES/updates.20211001.0000.bz2").unwrap()
    .add_filter("prefix", "211.98.251.0/24").unwrap();

for elem in parser {
    println!("{}", elem);
}

Common filters:

• prefix: Match a specific IP prefix
• origin_asn: Match origin AS number
• peer_asn: Match peer AS number
• peer_ip: Match peer IP address
• elem_type: Filter by announcement (a) or withdrawal (w)
• as_path: Match AS path with regex

Parsing Multiple MRT Files with BGPKIT Broker

BGPKIT Broker library provides search API for all RouteViews and RIPE RIS MRT data files. Using the broker’s Rust API (bgpkit-broker), we can easily compile a list of MRT files that we are interested in for any time period and any data type (update or rib). This allows users to gather information without needing to know about the locations of specific data files.

The example below shows a relatively more interesting example that does the following:

• find all BGP archive data created on time 1634693400
• filter to only BGP updates files
• find all announcements originated from AS13335
• print out the total count of the announcements

use bgpkit_parser::{BgpkitParser, BgpElem};

let broker = bgpkit_broker::BgpkitBroker::new()
    .ts_start("1634693400")
    .ts_end("1634693400")
    .page(1);

for item in broker.into_iter().take(2) {
    log::info!("downloading updates file: {}", &item.url);
    let parser = BgpkitParser::new(item.url.as_str()).unwrap();

    log::info!("parsing updates file");
    // iterating through the parser. the iterator returns `BgpElem` one at a time.
    let elems = parser
        .into_elem_iter()
        .filter_map(|elem| {
            if let Some(origins) = &elem.origin_asns {
                if origins.contains(&13335.into()) {
                    Some(elem)
                } else {
                    None
                }
            } else {
                None
            }
        })
        .collect::<Vec<BgpElem>>();
    log::info!("{} elems matches", elems.len());
}

Error Handling

BGPKIT Parser returns Result types for operations that may fail. Here are common scenarios and how to handle them:

Handling Parser Creation Errors

use bgpkit_parser::BgpkitParser;

// The URL might be invalid or unreachable
match BgpkitParser::new("http://example.com/data.mrt.bz2") {
    Ok(parser) => {
        for elem in parser {
            println!("{}", elem);
        }
    }
    Err(e) => {
        eprintln!("Failed to create parser: {}", e);
        // Common causes:
        // - Invalid URL or file path
        // - Network connection issues
        // - Unsupported compression format
    }
}

Handling Filter Errors

use bgpkit_parser::BgpkitParser;

let mut parser = BgpkitParser::new("http://example.com/data.mrt.bz2").unwrap();

// Filter addition can fail with invalid input
match parser.add_filter("prefix", "invalid-prefix") {
    Ok(_) => println!("Filter added successfully"),
    Err(e) => {
        eprintln!("Invalid filter: {}", e);
        // Common causes:
        // - Invalid IP prefix format
        // - Invalid AS number
        // - Unknown filter type
    }
}

Robust Production Code

use bgpkit_parser::BgpkitParser;

fn process_mrt_file(url: &str) -> Result<usize, Box<dyn std::error::Error>> {
    let parser = BgpkitParser::new(url)?
        .add_filter("origin_asn", "13335")?;

    let mut count = 0;
    for elem in parser {
        // Process element
        count += 1;
    }

    Ok(count)
}

// Usage
match process_mrt_file("http://example.com/updates.bz2") {
    Ok(count) => println!("Processed {} elements", count),
    Err(e) => eprintln!("Error: {}", e),
}

Advanced Examples

Parsing Real-time Data Streams

BGPKIT Parser provides parsing for real-time data streams, including RIS-Live and BMP/OpenBMP messages.

Parsing Messages From RIS-Live

Here is an example of handling RIS-Live message streams. After connecting to the websocket server, we need to subscribe to a specific data stream. In this example, we subscribe to the data stream from on collector (rrc21). We can then loop and read messages from the websocket.

use bgpkit_parser::parse_ris_live_message;
use serde_json::json;
use tungstenite::{connect, Message};

const RIS_LIVE_URL: &str = "ws://ris-live.ripe.net/v1/ws/?client=rust-bgpkit-parser";

/// This is an example of subscribing to RIS-Live's streaming data from one host (`rrc21`).
///
/// For more RIS-Live details, check out their documentation at https://ris-live.ripe.net/manual/
fn main() {
    // connect to RIPE RIS Live websocket server
    let (mut socket, _response) =
        connect(RIS_LIVE_URL)
            .expect("Can't connect to RIS Live websocket server");

    // subscribe to messages from one collector
    let msg = json!({"type": "ris_subscribe", "data": {"host": "rrc21"}}).to_string();
    socket.send(Message::Text(msg.into())).unwrap();

    loop {
        let msg = socket.read().expect("Error reading message").to_string();
        if let Ok(elems) = parse_ris_live_message(msg.as_str()) {
            for elem in elems {
                println!("{}", elem);
            }
        }
    }
}

Parsing OpenBMP Messages From RouteViews Kafka Stream

RouteViews provides a real-time Kafka stream of the OpenBMP data received from their collectors. Below is a partial example of how we handle the raw bytes received from the Kafka stream. For full examples, check out the examples folder on GitHub.

use bgpkit_parser::parser::bmp::messages::*;
use bgpkit_parser::parser::utils::*;
use bgpkit_parser::{Elementor, parse_openbmp_header, parse_bmp_msg};

let bytes = &m.value;
let mut data = Bytes::from(bytes.clone());
let header = parse_openbmp_header(&mut data).unwrap();
let bmp_msg = parse_bmp_msg(&mut data);
match bmp_msg {
    Ok(msg) => {
        let timestamp = header.timestamp;
        let per_peer_header = msg.per_peer_header.unwrap();
        match msg.message_body {
            BmpMessageBody::RouteMonitoring(m) => {
                for elem in Elementor::bgp_to_elems(
                    m.bgp_message,
                    timestamp,
                    &per_peer_header.peer_ip,
                    &per_peer_header.peer_asn
                )
                {
                    info!("{}", elem);
                }
            }
            _ => {}
        }
    }
    Err(_e) => {
        let hex = hex::encode(bytes);
        error!("{}", hex);
    }
}

Encoding: Archiving Filtered MRT Records

The example will download one MRT file from RouteViews, filter out all the BGP messages that are not originated from AS3356, and write the filtered MRT records to disk. Then it re-parses the filtered MRT file and prints out the number of BGP messages.

use bgpkit_parser::Elementor;
use itertools::Itertools;
use std::io::Write;

let mut updates_encoder = bgpkit_parser::encoder::MrtUpdatesEncoder::new();

bgpkit_parser::BgpkitParser::new(
    "http://archive.routeviews.org/bgpdata/2023.10/UPDATES/updates.20231029.2015.bz2",
).unwrap()
    .add_filter("origin_asn", "3356").unwrap()
    .into_iter()
    .for_each(|elem| {
        updates_encoder.process_elem(&elem);
    });

let mut mrt_writer = oneio::get_writer("as3356_mrt.gz").unwrap();
mrt_writer.write_all(updates_encoder.export_bytes().as_ref()).unwrap();
drop(mrt_writer);

FAQ & Troubleshooting

Common Issues

Parser creation fails with “unsupported compression”

Problem: The file uses an unsupported compression format.

Solution: BGPKIT Parser natively supports .bz2 and .gz compression. For other formats, decompress the file first or use the oneio crate which supports additional formats.

Out of memory when parsing large files

Problem: Collecting all elements into a vector exhausts available memory.

Solution: Use streaming iteration instead of collecting:

// ❌ Don't do this for large files
let all_elems: Vec<_> = parser.into_iter().collect();

// ✅ Process iteratively
for elem in parser {
    // Process one element at a time
    process(elem);
}

Slow performance on network files

Problem: Remote file parsing is slower than expected.

Solution:

• Use the --cache-dir option in CLI to cache downloaded files
• In library code, download the file first with appropriate buffering
• Consider processing files in parallel if dealing with multiple files

Missing or incomplete BGP attributes

Problem: Some BgpElem fields are None when you expect values.

Solution: Not all BGP messages contain all attributes. Check the MRT format and BGP message type:

• Withdrawals typically don’t have AS paths or communities
• Some collectors may not export certain attributes
• Use pattern matching to handle Option types properly

Performance Tips

Use filters early

Apply filters during parser creation to avoid processing unwanted data:

// ✅ Efficient - filters during parsing
let parser = BgpkitParser::new(url)?
    .add_filter("prefix", "1.1.1.0/24")?;

// ❌ Less efficient - processes everything first
let filtered: Vec<_> = BgpkitParser::new(url)?
    .into_iter()
    .filter(|e| e.prefix.to_string() == "1.1.1.0/24")
    .collect();

Process multiple files in parallel

For bulk processing, use parallel iterators:

use rayon::prelude::*;

let files = vec!["file1.mrt.bz2", "file2.mrt.bz2", "file3.mrt.bz2"];
files.par_iter().for_each(|file| {
    let parser = BgpkitParser::new(file).unwrap();
    // Process each file in parallel
});

Choose the right data structure

• Use MrtRecord iteration for minimal memory overhead
• Use BgpElem for easier per-prefix analysis
• See Data Representation for detailed comparison

Command Line Tool

bgpkit-parser is bundled with a utility commandline tool bgpkit-parser-cli.

Installation

Install compiled binaries

You can install the compiled bgpkit-parser CLI binaries with the following methods:

• Homebrew (macOS): brew install bgpkit/tap/bgpkit-parser
• Cargo binstall: cargo binstall bgpkit-parser

From source

You can install the tool by running

cargo install bgpkit-parser --features cli

or checkout this repository and run

cargo install --path . --features cli

Usage

Run bgpkit-parser --help to see the full list of options.

MRT/BGP/BMP data processing library

Usage: bgpkit-parser [OPTIONS] <FILE>

Arguments:
  <FILE>  File path to a MRT file, local or remote

Options:
  -c, --cache-dir <CACHE_DIR>    Set the cache directory for caching remote files. Default behavior does not enable caching
      --json                     Output as JSON objects
      --psv                      Output as full PSV entries with header
      --pretty                   Pretty-print JSON output
  -e, --elems-count              Count BGP elems
  -r, --records-count            Count MRT records
  -o, --origin-asn <ORIGIN_ASN>  Filter by origin AS Number
  -p, --prefix <PREFIX>          Filter by network prefix
  -4, --ipv4-only                Filter by IPv4 only
  -6, --ipv6-only                Filter by IPv6 only
  -s, --include-super            Include super-prefix when filtering
  -S, --include-sub              Include sub-prefix when filtering
  -j, --peer-ip <PEER_IP>        Filter by peer IP address
  -J, --peer-asn <PEER_ASN>      Filter by peer ASN
  -m, --elem-type <ELEM_TYPE>    Filter by elem type: announce (a) or withdraw (w)
  -t, --start-ts <START_TS>      Filter by start unix timestamp inclusive
  -T, --end-ts <END_TS>          Filter by end unix timestamp inclusive
  -a, --as-path <AS_PATH>        Filter by AS path regex string
  -h, --help                     Print help
  -V, --version                  Print version

Common CLI Examples

Basic usage - Print all BGP messages

bgpkit-parser http://archive.routeviews.org/bgpdata/2021.10/UPDATES/updates.20211001.0000.bz2

Filter by origin AS

bgpkit-parser -o 13335 updates.20211001.0000.bz2

Filter by prefix

bgpkit-parser -p 1.1.1.0/24 updates.20211001.0000.bz2

Output as JSON

bgpkit-parser --json updates.20211001.0000.bz2 > output.json

Count elements efficiently

bgpkit-parser -e updates.20211001.0000.bz2

Cache remote files for faster repeated access

bgpkit-parser -c ~/.bgpkit-cache http://example.com/updates.mrt.bz2

Combine filters

# IPv4 announcements from AS13335
bgpkit-parser -o 13335 -m a -4 updates.bz2

Data Representation

BGPKIT Parser provides two ways to access parsed BGP data: MrtRecord and BgpElem. Choose based on your needs:

┌──────────────────────────────────────────────┐
│                  MRT File                    │
│  (Binary format: bgp4mp, tabledumpv2, etc.)  │
└──────────────────────┬───────────────────────┘
                       │
                       ├──> Parser
                       │
         ┌─────────────┴────────────────┐
         │                              │
         ▼                              ▼
   [MrtRecord]                    [BgpElem]
   (Low-level)                  (High-level)
         │                              │
         └──────────────┬───────────────┘
                        │
                        ▼
              Your Analysis Code

MrtRecord: Low-level MRT Representation

MrtRecord preserves the complete, unmodified information from the MRT file. Use this when you need:

• Raw MRT data access: Direct access to all MRT fields
• Format-specific details: Peer index tables, geo-location data, etc.
• Memory efficiency: Minimal overhead, compact representation
• Re-encoding: Converting back to MRT format

See the MrtRecord documentation for the complete structure definition.

Key components:

• common_header: Contains timestamp, record type, and metadata
• message: The actual MRT message (TableDump, TableDumpV2, or Bgp4Mp)

Iteration: Use BgpkitParser::into_record_iter() to iterate over MrtRecords.

BgpElem: High-level Per-Prefix Representation

BgpElem provides a simplified, per-prefix view of BGP data. Each BgpElem represents a single prefix announcement or withdrawal. Use this when you want:

• Simple analysis: Focus on prefixes without worrying about MRT format details
• Format-agnostic processing: Same structure regardless of MRT format
• BGP attributes: Easy access to AS path, communities, etc.

Example transformation:

MRT Record with 3 prefixes        →        3 BgpElem objects
┌────────────────────────┐              ┌──────────────────┐
│ BGP UPDATE Message     │              │ BgpElem          │
│ AS Path: 64512 64513   │  ────────>   │ prefix: P1       │
│ Prefixes:              │              │ as_path: 64512.. │
│   - P1: 10.0.0.0/24    │              └──────────────────┘
│   - P2: 10.0.1.0/24    │              ┌──────────────────┐
│   - P3: 10.0.2.0/24    │  ────────>   │ BgpElem          │
└────────────────────────┘              │ prefix: P2       │
                                        │ as_path: 64512.. │
                                        └──────────────────┘
                                        ┌──────────────────┐
                                        │ BgpElem          │
                            ────────>   │ prefix: P3       │
                                        │ as_path: 64512.. │
                                        └──────────────────┘

See the BgpElem documentation for the complete structure definition.

Key fields:

• timestamp: Unix timestamp of the BGP message
• elem_type: Announcement or withdrawal
• peer_ip / peer_asn: The BGP peer information
• prefix: The IP prefix being announced or withdrawn
• as_path: The AS path attribute (if present)
• origin_asns: Origin AS numbers extracted from AS path
• communities: BGP communities (standard, extended, and large)
• next_hop, local_pref, med: Other BGP attributes

Iteration: Use BgpkitParser::into_elem_iter() or default iteration to iterate over BgpElems.

Which One Should I Use?

• Use BgpElem (default): For most BGP analysis tasks, prefix tracking, AS path analysis
• Use MrtRecord: When you need MRT format details, re-encoding, or minimal memory overhead

Memory trade-off: BgpElem duplicates shared attributes (AS path, communities) for each prefix, consuming more memory but providing simpler analysis.

RFCs Support

BGPKIT Parser implements comprehensive BGP, MRT, BMP, and related protocol standards. All listed RFCs are fully supported.

Request a feature: If you need support for a specific RFC not listed here, please submit an issue on GitHub.

Core BGP Protocol

Most commonly used:

• RFC 4271: A Border Gateway Protocol 4 (BGP-4) - Core protocol
• RFC 2858: Multiprotocol Extensions for BGP-4 (IPv6 support)
• RFC 6793: Four-Octet AS Number Space
• RFC 7911: Advertisement of Multiple Paths (ADD-PATH)

Additional BGP RFCs:

• RFC 2042: Registering New BGP Attribute Types
• RFC 2918: Route Refresh Capability for BGP-4
• RFC 3392: Capabilities Advertisement with BGP-4
• RFC 4724: Graceful Restart Mechanism for BGP
• RFC 4456: BGP Route Reflection
• RFC 5065: Autonomous System Confederations for BGP
• RFC 5492: Capabilities Advertisement with BGP-4
• RFC 7606: Revised Error Handling for BGP UPDATE Messages
• RFC 8654: Extended Message Support for BGP
• RFC 8950: Advertising IPv4 NLRI with an IPv6 Next Hop
• RFC 9072: Extended Optional Parameters Length for BGP OPEN Message
• RFC 9234: Route Leak Prevention Using Roles in UPDATE and OPEN Messages

MRT (Multi-Threaded Routing Toolkit)

• RFC 6396: MRT Routing Information Export Format
• RFC 6397: MRT BGP Routing Information Export Format with Geo-Location Extensions
• RFC 8050: MRT Routing Information Export Format with BGP Additional Path Extensions

BMP (BGP Monitoring Protocol)

• RFC 7854: BGP Monitoring Protocol (BMP)
• RFC 8671: Support for Adj-RIB-Out in BMP
• RFC 9069: Support for Local RIB in BMP

BGP Communities

Full support for standard, extended, and large communities:

• RFC 1997: BGP Communities Attribute
• RFC 4360: BGP Extended Communities Attribute
• RFC 5668: 4-Octet AS Specific BGP Extended Community
• RFC 5701: IPv6 Address Specific BGP Extended Community Attribute
• RFC 7153: IANA Registries for BGP Extended Communities
• RFC 8097: BGP Prefix Origin Validation State Extended Community
• RFC 8092: BGP Large Communities

Advanced Features

FlowSpec:

• RFC 8955: Dissemination of Flow Specification Rules
• RFC 8956: Dissemination of Flow Specification Rules for IPv6
• RFC 9117: Revised Validation Procedure for BGP Flow Specifications

Tunnel Encapsulation:

• RFC 5640: Load-Balancing for Mesh Softwires
• RFC 8365: Ethernet VPN (EVPN)
• RFC 9012: BGP Tunnel Encapsulation Attribute

Link-State (BGP-LS):

• RFC 7752: North-Bound Distribution of Link-State and TE Information
• RFC 8571: BGP-LS Advertisement of IGP TE Performance Metric Extensions
• RFC 9085: BGP-LS Extensions for Segment Routing
• RFC 9294: BGP-LS Advertisement of Application-Specific Link Attributes

See Also

Related BGPKIT Projects

• BGPKIT Broker: Search and discover MRT data files from RouteViews and RIPE RIS
• BGPKIT API: RESTful API for MRT data file discovery
• Monocle: Real-time BGP monitoring and alerting
• BGPKIT Commons: Common data structures and utilities

Resources

• GitHub Repository: Source code, examples, and issue tracking
• Documentation: Full API documentation
• Changelog: Version history and release notes

Community

• Questions? Open a GitHub Discussion
• Found a bug? Submit a GitHub Issue

Re-exports

pub use models::BgpElem;

pub use models::MrtRecord;

pub use parser::*;

Modules

encoder

error

error module defines the error types used in bgpkit-parser.

models

bgp-models module defines the basic BGP and MRT message data structures.

parser

parser module maintains the main logic for processing BGP and MRT messages.