captive.whump.shanti-portal/plugins/ipset.py
Stefan Midjich 6f476223b5 Two major changes in this commit:
* Moving from iptables to ipset
	* Moving from python-sh to subprocess
2017-11-15 23:12:16 +01:00

113 lines
3 KiB
Python

# Add client IP into ipset
import re
import socket
import subprocess
import shlex
from io import BytesIO, StringIO
from logging import getLogger, DEBUG, WARN, INFO
from datetime import datetime
try:
from configparser import RawConfigParser
except ImportError:
from ConfigParser import RawConfigParser
# By default run ipset through sudo, so the worker process must run with
# a user that is allowed to execute '/sbin/ipset add' command with NOPASSWD.
#from sh import sudo, Command, ErrorReturnCode
from portal import logHandler, logFormatter
def run(arg):
# Some info from the plugin dispatcher.
environ = arg['environ']
plugin_config = arg['config']
config = RawConfigParser(defaults=plugin_config)
config.add_section('ipset')
config._sections['ipset'] = plugin_config
# Setup plugin logging
l = getLogger('plugin_ipset')
l.addHandler(logHandler)
if config.getboolean('ipset', 'debug'):
l.setLevel(DEBUG)
l.debug('debug logging enabled')
# Get client IP from webapp, try HTTP_X_FORWARDED_FOR and fallback on
# REMOTE_ADDR.
client_ip = environ.get(
'HTTP_X_FORWARDED_FOR',
environ.get('REMOTE_ADDR')
)
error_msg = None
plugin_failed = True
start_time = datetime.now()
# Verify client IP
try:
socket.inet_aton(client_ip)
except socket.error:
l.error('Client IP-address is invalid')
return {
'error': str(e),
'failed': True
}
ipset_name = config.get('ipset', 'ipset_name')
use_sudo = config.getboolean('ipset', 'use_sudo')
#output, error = StringIO(), StringIO()
if client_ip:
ipset_cmd = config.get(
'ipset',
'ipset_add_cmd'
).format(
client_ip=client_ip
)
proc = subprocess.Popen(
shlex.split(ipset_cmd)
)
try:
(output, error) = proc.communicate(timeout=2)
except Exception as e:
error_msg = str(e)
l.warn('{cmd}: failed call: {error}'.format(
cmd=ipset_cmd,
error=str(e)
))
raise
end_time = datetime.now()
if proc.returncode == 0:
l.info('Added ip:"{ip}" to set:"{set}" in "{duration}": {stdout}'.format(
ip=client_ip,
set=ipset_name,
duration=end_time-start_time,
stdout=output
))
plugin_failed = False
else:
l.warn('{cmd}: failed[{ret}] in "{duration}": {stderr}'.format(
cmd=ipset_cmd,
ret=proc.returncode,
duration=end_time-start_time,
stderr=error
))
raise Exception('Plugin failed')
else:
l.info('No client IP, no action taken')
error_msg = 'No client IP'
raise Exception('Plugin failed')
return {
'error': error_msg,
'failed': plugin_failed
}