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# -*- coding: utf-8 -*-
# Description: openvpn status log netdata python.d module
# Author: l2isbad
# SPDX-License-Identifier: GPL-3.0-or-later
from re import compile as r_compile
from bases.FrameworkServices.SimpleService import SimpleService
priority = 60000
retries = 60
update_every = 10
ORDER = ['users', 'traffic']
CHARTS = {
'users': {
'options': [None, 'OpenVPN Active Users', 'active users', 'users', 'openvpn_status.users', 'line'],
'lines': [
['users', None, 'absolute'],
]
},
'traffic': {
'options': [None, 'OpenVPN Traffic', 'KB/s', 'traffic', 'openvpn_status.traffic', 'area'],
'lines': [
['bytes_in', 'in', 'incremental', 1, 1 << 10], ['bytes_out', 'out', 'incremental', 1, -1 << 10]
]
}
}
TLS_REGEX = r_compile(r'(?:[0-9a-f:]+|(?:\d{1,3}(?:\.\d{1,3}){3}(?::\d+)?)) (?P<bytes_in>\d+) (?P<bytes_out>\d+)')
STATIC_KEY_REGEX = r_compile(r'TCP/[A-Z]+ (?P<direction>(?:read|write)) bytes,(?P<bytes>\d+)')
class Service(SimpleService):
def __init__(self, configuration=None, name=None):
SimpleService.__init__(self, configuration=configuration, name=name)
self.order = ORDER
self.definitions = CHARTS
self.log_path = self.configuration.get('log_path')
self.regex = {
'tls': TLS_REGEX,
'static_key': STATIC_KEY_REGEX
}
def check(self):
if not (self.log_path and isinstance(self.log_path, str)):
self.error("'log_path' is not defined")
return False
data = self._get_raw_data()
if not data:
self.error('Make sure that the openvpn status log file exists and netdata has permission to read it')
return None
found = None
for row in data:
if 'ROUTING' in row:
self.get_data = self.get_data_tls
found = True
break
elif 'STATISTICS' in row:
self.get_data = self.get_data_static_key
found = True
break
if found:
return True
self.error('Failed to parse ovpenvpn log file')
return False
def _get_raw_data(self):
"""
Open log file
:return: str
"""
try:
with open(self.log_path) as log:
raw_data = log.readlines() or None
except OSError:
return None
else:
return raw_data
def get_data_static_key(self):
"""
Parse openvpn-status log file.
"""
raw_data = self._get_raw_data()
if not raw_data:
return None
data = dict(bytes_in=0, bytes_out=0)
for row in raw_data:
match = self.regex['static_key'].search(row)
if match:
match = match.groupdict()
if match['direction'] == 'read':
data['bytes_in'] += int(match['bytes'])
else:
data['bytes_out'] += int(match['bytes'])
return data or None
def get_data_tls(self):
"""
Parse openvpn-status log file.
"""
raw_data = self._get_raw_data()
if not raw_data:
return None
data = dict(users=0, bytes_in=0, bytes_out=0)
for row in raw_data:
columns = row.split(',') if ',' in row else row.split()
if 'UNDEF' in columns:
# see https://openvpn.net/archive/openvpn-users/2004-08/msg00116.html
continue
match = self.regex['tls'].search(' '.join(columns))
if match:
match = match.groupdict()
data['users'] += 1
data['bytes_in'] += int(match['bytes_in'])
data['bytes_out'] += int(match['bytes_out'])
return data or None
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