カテゴリー: プログラミング

#!/usr/bin/env python3
#--*-- coding: utf-8 --*--
# 対象ネットワーク： docker bridge network([shared] 192.168.29.0/24)
# ブロックリストホスト： 192.168.29.1
# 起動(su)： /usr/local/sbin/blocklistsrv.py | /usr/bin/logger -i -t blocklistsrv 2>&1 &
# 停止：　ps aux | grep blocklistsrv  -> kill -9
# ポート確認： lsof -i :8765  -> kill -9

import os, sys, socket
import psutil
import argparse
import re
import numpy as np

import daemon
from daemon import pidfile

pfile = '/var/run/blocklist-server.pid'

ipset_ufw = '/etc/ufw/before.rules'
ipset_start_line = 'blacklist-ipset-S'
ipset_end_line = 'blacklist-ipset-E'

svport = 8765
svhost = '192.168.29.1'

def getArgs():
    parser = argparse.ArgumentParser('blocklist service cmd')
    parser.add_argument('cmd', nargs='?', help='(start|stop|restart)')
    parser.add_argument('-l', '--syslog', action='store_true', help='enable syslog output')
    return parser.parse_args()

args = getArgs()

ーーー省略ーーー
def blserver():
    socket1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    socket1.bind((svhost, svport))
    socket1.listen(5)

    logger.info('Start Blocklist server. port : %d', (svport))
    while True:
        try:
            clientsocket, address = socket1.accept()
            blist = []
            logger.info(f"Connection from {address} has been established!")
            with open(ipset_ufw, 'r', encoding='utf-8') as fi:
                for line in fi:
                    if re.search(ipset_start_line, line):
                        break
                for line in fi:
                    if res:= re.match('^-A ufw-before-input -s ([0-9./]+) .*', line):
                        #logger.debug(res[1])
                        blist.append(res[1])
                    if re.search(ipset_end_line, line):
                        break
        #except KeyboardInterrupt:
        #    #clientsocket.close()
        #    exit('exit with keyboard interrupt!')
        except FileNotFoundError:
            logger.error('file not found! : %s' % (ipset_ufw))
        except PermissionError:
            logger.error('can\'t read %s, please run as superuser!' % (ipset_ufw))
        finally:
            clientsocket.send('\n'.join(blist).encode('utf-8'))
            clientsocket.close()

        ## blist 送信 

def main():
    #args = getArgs()
    #logger = getLoggerConf(args.syslog)
    if args.cmd == 'start':
        pass
    elif args.cmd == 'stop' or args.cmd == 'restart':
        # デーモンストップ
        if os.path.exists(pfile):
            try:
                logger.info(pfile + " is exits")
                pid =  open(pfile, 'r').read().rstrip()
                proc = psutil.Process(int(pid))
                proc.terminate()
                os.remove(pfile)
                logger.info('pid : %s removed.' % pid)
            except PermissionError:
                logger.error('PID File, permission error, please run as super user.')
                exit(0)
            #except:
            #    logger.error('some error occured.')
        if args.cmd == 'stop':
            exit(0)
    else:
        logger.error('operation command is one of (start|stop|restart)')
        exit(1)

    # デーモン起動
    with daemon.DaemonContext(pidfile=pidfile.TimeoutPIDLockFile(pfile)) as context:
        logger.info(context.is_open)
        blserver()


    #exit(0)



if __name__ == '__main__':
    main()

[Unit]
Description=blocklistsrv: this is service of ufw blocking IP address list.
After=docker.service

[Service]
ExecStart=/usr/local/sbin/blocklist-service -l start
ExecStop=/usr/local/sbin/blocklist-service -l stop
ExecReload=/usr/local/sbin/blocklist-service -l restart
Restart=no
Type=simple

[Install]
WantedBy=multi-user.target

blocklist_socket_server = ('192.168.29.1', 8765) 

def get_blocklist():                                                                                                    
    """                                                                                                                 
    root権限でブロックリスト取得コマンドを走らせて標準入力からブロックアドレスのリストを返す                            
    """                                                                                                                 
    socket1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)                                                         
    socket1.connect(blocklist_socket_server)                                                                            
    bipset = [ ipv4adrset(ips) for ips in socket1.recv(4096).decode('utf-8').split('\n') ]                              
    return bipset