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check_ip2asn_visibility.py
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import argparse
import configparser
import logging
import os
import sys
from collections import namedtuple
from datetime import datetime, timezone
from kafka_wrapper.kafka_reader import KafkaReader
from kafka_wrapper.kafka_writer import KafkaWriter
from network_dependency.utils.helper_functions import \
parse_timestamp_argument, check_keys
from iplookup.ip_lookup import IPLookup, Visibility
DATE_FMT = '%Y-%m-%dT%H:%M'
OUTPUT_EXTENSION = '.csv'
OUTPUT_DELIMITER = ','
DEPENDENCY_FIELDS = ['asn', 'scopes', 'unique_ips', 'transit_ips',
'last_hop_ips', 'rib_prefix_count', 'rib_prefix_ip_sum',
'ixp_prefix_count', 'ixp_prefix_ip_sum']
Dependency = namedtuple('Dependency', DEPENDENCY_FIELDS,
defaults=[0] * len(DEPENDENCY_FIELDS))
def check_config(config_path: str) -> configparser.ConfigParser:
config = configparser.ConfigParser()
config.read(config_path)
try:
config.get('input', 'kafka_topic')
config.get('kafka', 'bootstrap_servers')
config.get('ip2asn', 'path')
config.get('ip2asn', 'db')
config.get('ip2ixp', 'kafka_bootstrap_servers')
config.get('ip2ixp', 'ix_kafka_topic')
config.get('ip2ixp', 'netixlan_kafka_topic')
except configparser.NoSectionError as e:
logging.error(f'Missing section in config file: {e}')
return configparser.ConfigParser()
except configparser.NoOptionError as e:
logging.error(f'Missing option in config file: {e}')
return configparser.ConfigParser()
output_specified = config.get('output', 'data_directory', fallback=None) \
or config.get('output', 'kafka_topic', fallback=None)
if not output_specified:
logging.error('No output specified in config file. At least one of '
'[data_directory, kafka_topic] is required.')
return configparser.ConfigParser()
return config
def process_msg(msg: dict, lookup: IPLookup) -> Dependency:
keys = ['asn', 'scopes', 'unique_ips', 'transit_ips', 'last_hop_ips']
if check_keys(keys, msg):
logging.warning(f'Missing keys {keys} in message: {msg}')
return Dependency()
asn = msg['asn']
scopes = msg['scopes']
unique_ips = msg['unique_ips']
transit_ips = msg['transit_ips']
last_hop_ips = msg['last_hop_ips']
visibility: Visibility = lookup.asn2source(asn)
return Dependency(asn,
scopes,
unique_ips,
transit_ips,
last_hop_ips,
visibility.ip2asn_prefixes.prefix_count,
visibility.ip2asn_prefixes.prefix_ip_sum,
visibility.ip2ixp_prefixes.prefix_count,
visibility.ip2ixp_prefixes.prefix_ip_sum)
def write_csv_output(data_dir: str,
input_topic: str,
start_ts_dt: datetime,
dependencies: list) -> None:
if not data_dir.endswith('/'):
data_dir += '/'
output_file = data_dir + 'ip2asn_visibility.' + input_topic + '.' + \
start_ts_dt.strftime(DATE_FMT) + OUTPUT_EXTENSION
output_lines = [('asn', 'scopes', 'unique_ips', 'transit_ips',
'last_hop_ips', 'rib_prefix_count', 'rib_prefix_ip_sum',
'ixp_prefix_count', 'ixp_prefix_ip_sum')] + dependencies
os.makedirs(data_dir, exist_ok=True)
logging.info(f'Writing {len(dependencies)} entries to file {output_file}')
with open(output_file, 'w') as f:
f.write('\n'.join([OUTPUT_DELIMITER.join(map(str, line))
for line in output_lines]))
def write_kafka_output(output_topic: str,
bootstrap_servers: str,
output_ts: int,
dependencies: list) -> None:
logging.info(f'Writing {len(dependencies)} entries to topic {output_topic}')
writer = KafkaWriter(output_topic,
bootstrap_servers,
num_partitions=10,
# 2 months
config={'retention.ms': 5184000000})
msg = {'timestamp': int(output_ts / 1000)}
with writer:
for dependency in dependencies:
msg.update(dependency._asdict())
writer.write(msg['asn'], msg, output_ts)
def main() -> None:
log_fmt = '%(asctime)s %(levelname)s %(message)s'
logging.basicConfig(
format=log_fmt,
level=logging.INFO,
filename='check_ip2asn_visibility.log',
datefmt='%Y-%m-%d %H:%M:%S'
)
parser = argparse.ArgumentParser()
parser.add_argument('config')
parser.add_argument('timestamp', help='Timestamp (as UNIX epoch in seconds '
'or milliseconds, or in '
'YYYY-MM-DDThh:mm format)')
args = parser.parse_args()
logging.info(f'Started {sys.argv}')
config = check_config(args.config)
if not config.sections():
sys.exit(1)
lookup = IPLookup(config)
logging.info(f'Loaded {len(lookup.i2asn_ipv4_asns)} RIB ASes')
logging.info(f'Loaded {len(lookup.ixp_ipv4_asns)} IXP ASes')
start_ts = parse_timestamp_argument(args.timestamp) * 1000
if start_ts == 0:
logging.error(f'Invalid timestamp specified: {args.timestamp}')
sys.exit(1)
end_ts = start_ts + 1
start_ts_dt = datetime.fromtimestamp(start_ts / 1000, tz=timezone.utc)
logging.info(f'Checking timestamp {start_ts_dt.strftime(DATE_FMT)}')
input_topic = config.get('input', 'kafka_topic')
bootstrap_servers = config.get('kafka', 'bootstrap_servers')
kafka_reader = KafkaReader([input_topic], bootstrap_servers, start_ts,
end_ts)
dependencies = list()
with kafka_reader:
for msg in kafka_reader.read():
dependency = process_msg(msg, lookup)
if dependency.asn == '0':
continue
dependencies.append(dependency)
# Sort by ascending unique_ips, rip_prefix_count, ixp_prefix_count
dependencies.sort(key=lambda t: (t[2], t[5], t[7]))
logging.info(f'Read {len(dependencies)} ASes from kafka topic.')
data_dir = config.get('output', 'data_directory', fallback=None)
if data_dir:
write_csv_output(data_dir, input_topic, start_ts_dt, dependencies)
output_topic = config.get('output', 'kafka_topic', fallback=None)
if output_topic:
write_kafka_output(output_topic,
bootstrap_servers,
start_ts,
dependencies)
if __name__ == '__main__':
main()
sys.exit(0)