Current File : //backups/router/usr/local/opnsense/scripts/syslog/logformats/syslog.py
"""
Copyright (c) 2020 Ad Schellevis <ad@opnsense.org>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
"""
import re
import datetime
from . import NewBaseLogFormat
class SysLogFormat(NewBaseLogFormat):
def __init__(self, filename):
super(SysLogFormat, self).__init__(filename)
self._priority = 2
self._startup_timestamp = datetime.datetime.now()
@staticmethod
def match(line):
return len(line) > 15 and re.match(r'(?:[01]\d|2[0123]):(?:[012345]\d):(?:[012345]\d)', line[7:15])
@property
def timestamp(self):
# syslog format, strip timestamp and return actual log data
ts = datetime.datetime.strptime("%s %s" % (self._startup_timestamp.year, self._line[0:15]), "%Y %b %d %H:%M:%S")
ts = ts.replace(year=self._startup_timestamp.year)
if (self._startup_timestamp - ts).days < 0:
# likely previous year, (month for this year not reached yet)
ts = ts.replace(year=ts.year - 1)
return ts.isoformat()
@property
def line(self):
# parse [date] [hostname] [process_name] [line] format
response = self._line[16:]
tmp = response.find(':')
return response[tmp+1:].strip() if tmp > -1 else response[response.find(' ')+1:].strip()
@property
def process_name(self):
response = self._line[16:]
tmp = response.find(':')
return response[:tmp].strip().split()[-1] if tmp > -1 else ""
class ServiceLogFormat(NewBaseLogFormat):
def __init__(self, filename):
super(ServiceLogFormat, self).__init__(filename)
@staticmethod
def match(line):
return len(line) > 25 and line[19] in ['+', '-'] \
and re.match(r'\d{4}(.\d{2}){2}(\s|T)(\d{2}.){2}\d{2}', line[0:19])
@property
def timestamp(self):
return self._line[0:19]
@property
def line(self):
return self._line[26:]
class SysLogFormatEpoch(NewBaseLogFormat):
def __init__(self, filename):
super(SysLogFormatEpoch, self).__init__(filename)
self._priority = 3
@staticmethod
def match(line):
# looks like an epoch
return len(line) > 15 and line[0:10].isdigit() and line[10] == '.' and line[11:14].isdigit()
@property
def timestamp(self):
return datetime.datetime.fromtimestamp(float(self._line[0:14])).isoformat(timespec='milliseconds')
@property
def line(self):
return self._line[14:].strip()
class SysLogFormatRFC5424(NewBaseLogFormat):
def __init__(self, filename):
super().__init__(filename)
self._priority = 1
self._parts = list()
@staticmethod
def match(line):
return len(line) > 15 and line[0] == '<' and '>' in line[1:5] and line.find(']') > 0
def set_line(self, line):
super().set_line(line)
self._parts = self._line.split(maxsplit=5)
@property
def line(self):
return self._line.split(']', 1)[-1]
@property
def timestamp(self):
return self._parts[1].split('+', maxsplit=1)[0]
@property
def process_name(self):
return self._parts[3]
@property
def pid(self):
return self._parts[4]
@property
def facility(self):
return int(int(self._line[1:].split('>', 1)[0]) / 8)
@property
def severity(self):
tmp = int(self._line[1:].split('>', 1)[0])
return tmp - (int((tmp / 8)) * 8)
Mini Shell