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#!/usr/bin/env python3
#
# Copyright VyOS maintainers and contributors <maintainers@vyos.io>
#
# 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 sys
import typing
import xmltodict
from tabulate import tabulate
from vyos.utils.process import cmd
from vyos.utils.network import get_vrf_tableid
import vyos.opmode
ArgFamily = typing.Literal['inet', 'inet6']
def _get_xml_data(family, orig_zone=None):
"""
Get conntrack XML output
"""
args = ['--dump', '--family', family, '--output', 'xml']
if orig_zone is not None:
args.extend(['--orig-zone', str(orig_zone)])
return cmd(['sudo', 'conntrack'] + args)
def _xml_to_dict(xml):
"""
Convert XML to dictionary
Return: dictionary
"""
parse = xmltodict.parse(xml, attr_prefix='')
# 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_raw_data(family, orig_zone=None):
"""
Return: dictionary
"""
xml = _get_xml_data(family, orig_zone=orig_zone)
if len(xml) == 0:
output = {'conntrack':
{
'error': True,
'reason': 'entries not found'
}
}
return output
return _xml_to_dict(xml)
def _get_raw_statistics():
entries = []
data = cmd('sudo conntrack --stats')
data = data.replace(' \t', '').split('\n')
for entry in data:
entries.append(entry.split())
return entries
def get_formatted_statistics(entries):
headers = [
"CPU",
"Found",
"Invalid",
"Insert",
"Insert fail",
"Drop",
"Early drop",
"Errors",
"Search restart",
"",
"",
]
# Process each entry to extract and format the values after '='
processed_entries = [
[value.split('=')[-1] for value in entry]
for entry in entries
]
output = tabulate(processed_entries, headers, numalign="left")
return output
def get_formatted_output(dict_data):
"""
:param xml:
:return: formatted output
"""
data_entries = []
if 'error' in dict_data['conntrack']:
return 'Entries not found'
for entry in dict_data['conntrack']['flow']:
orig_src, orig_dst, orig_sport, orig_dport = {}, {}, {}, {}
reply_src, reply_dst, reply_sport, reply_dport = {}, {}, {}, {}
orig_packets = orig_bytes = reply_packets = reply_bytes = '0'
zone = ''
proto = {}
for meta in entry['meta']:
direction = meta['direction']
if direction in ['original']:
if 'layer3' in meta:
orig_src = meta['layer3']['src']
orig_dst = meta['layer3']['dst']
if 'layer4' in meta:
if meta.get('layer4').get('sport'):
orig_sport = meta['layer4']['sport']
if meta.get('layer4').get('dport'):
orig_dport = meta['layer4']['dport']
proto = meta['layer4']['protoname']
if 'counters' in meta:
orig_packets = meta['counters']['packets']
orig_bytes = meta['counters']['bytes']
if 'zone' in meta:
zone = meta['zone']
if direction in ['reply']:
if 'layer3' in meta:
reply_src = meta['layer3']['src']
reply_dst = meta['layer3']['dst']
if 'layer4' in meta:
if meta.get('layer4').get('sport'):
reply_sport = meta['layer4']['sport']
if meta.get('layer4').get('dport'):
reply_dport = meta['layer4']['dport']
proto = meta['layer4']['protoname']
if 'counters' in meta:
reply_packets = meta['counters']['packets']
reply_bytes = meta['counters']['bytes']
if direction == 'independent':
# T6138 flowtable offload conntrack entries without 'timeout'
timeout = meta.get('timeout', 'n/a')
orig_src = f'{orig_src}:{orig_sport}' if orig_sport else orig_src
orig_dst = f'{orig_dst}:{orig_dport}' if orig_dport else orig_dst
reply_src = f'{reply_src}:{reply_sport}' if reply_sport else reply_src
reply_dst = f'{reply_dst}:{reply_dport}' if reply_dport else reply_dst
state = meta['state'] if 'state' in meta else ''
mark = meta['mark'] if 'mark' in meta else ''
if 'zone' in meta:
zone = meta['zone']
data_entry = [
orig_src,
orig_dst,
orig_packets,
orig_bytes,
reply_src,
reply_dst,
reply_packets,
reply_bytes,
proto,
state,
timeout,
mark,
zone,
]
data_entries.append(data_entry)
headers = [
"Original src",
"Original dst",
"Original packets",
"Original bytes",
"Reply src",
"Reply dst",
"Reply packets",
"Reply bytes",
"Protocol",
"State",
"Timeout",
"Mark",
"Zone",
]
output = tabulate(data_entries, headers, numalign="left")
return output
def show(raw: bool, family: ArgFamily, vrf: typing.Optional[str]):
family = 'ipv6' if family == 'inet6' else 'ipv4'
orig_zone = get_vrf_tableid(vrf) if vrf else None
if vrf and orig_zone is None: # VRF is specified, but tableid is not found
raise vyos.opmode.IncorrectValue(f'VRF \'{vrf}\' not found or has no table ID')
conntrack_data = _get_raw_data(family, orig_zone=orig_zone)
if raw:
return conntrack_data
else:
return get_formatted_output(conntrack_data)
def show_statistics(raw: bool):
conntrack_statistics = _get_raw_statistics()
if raw:
return conntrack_statistics
else:
return get_formatted_statistics(conntrack_statistics)
if __name__ == '__main__':
try:
res = vyos.opmode.run(sys.modules[__name__])
if res:
print(res)
except (ValueError, vyos.opmode.Error) as e:
print(e)
sys.exit(1)
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