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#!/usr/bin/env python3
#
# Copyright (C) 2022 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import xmltodict
from tabulate import tabulate
from vyos.util import cmd
def _get_raw_data():
"""
Get conntrack XML output
"""
return cmd(f'sudo conntrack --dump --output xml')
def _xml_to_dict(xml):
"""
Convert XML to dictionary
Return: dictionary
"""
parse = xmltodict.parse(xml)
# If only one conntrack entry we must change dict
if 'meta' in parse['conntrack']['flow']:
return dict(conntrack={'flow': [parse['conntrack']['flow']]})
return parse
def _get_formatted_output(xml):
"""
:param xml:
:return: formatted output
"""
data_entries = []
dict_data = _xml_to_dict(xml)
for entry in dict_data['conntrack']['flow']:
src, dst, sport, dport, proto = {}, {}, {}, {}, {}
for meta in entry['meta']:
direction = meta['@direction']
if direction in ['original']:
if 'layer3' in meta:
src = meta['layer3']['src']
dst = meta['layer3']['dst']
if 'layer4' in meta:
if meta.get('layer4').get('sport'):
sport = meta['layer4']['sport']
if meta.get('layer4').get('dport'):
dport = meta['layer4']['dport']
proto = meta['layer4']['@protoname']
if direction == 'independent':
conn_id = meta['id']
timeout = meta['timeout']
src = f'{src}:{sport}' if sport else src
dst = f'{dst}:{dport}' if dport else dst
state = meta['state'] if 'state' in meta else ''
data_entries.append([conn_id, src, dst, proto, state, timeout])
headers = ["Connection id", "Source", "Destination", "Protocol", "State", "Timeout"]
output = tabulate(data_entries, headers, numalign="left")
return output
def show(raw: bool):
conntrack_data = _get_raw_data()
if raw:
return conntrack_data
else:
return _get_formatted_output(conntrack_data)
if __name__ == '__main__':
print(show(raw=False))
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