dyndomain script
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#!/usr/bin/python3
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import sys
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import os
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import configparser
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import subprocess
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import smtplib
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import time
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from email.message import EmailMessage
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from pprint import pprint
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rundir=os.path.realpath(os.path.dirname(sys.argv[0]))
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os.chdir(rundir)
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from sysbus import sysbus
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from ovh import ovh
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def load_conf():
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global zone_filename, log_filename
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global wan_hostname, zone_domain, zone_subdomain
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global hosts_list, hosts_ipv4_nat_list
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global mail_from, mail_to
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conf = configparser.ConfigParser(allow_no_value=True)
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conf.read('home.conf')
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zone_filename = conf['Files']['zonefile']
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log_filename = conf['Files']['logfile']
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wan_hostname = conf['Wan']['hostname']
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zone_domain = conf['Zone']['domain']
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zone_subdomain = conf['Zone']['subdomain']
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mail_from = conf['Mail']['from']
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mail_to = conf['Mail']['to']
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hosts_list = [ host for host in conf['Hosts'] ]
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hosts_ipv4_nat_list = [ host for host in conf['NatHosts'] ]
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def ping(hostname):
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cmd = "ping -c1 -w3 %s" % hostname
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ret = subprocess.run(cmd.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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return 0 if ret.returncode else 1
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def get_ipv6_hosts():
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r = sysbus.requete('Hosts:getDevices')
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ipv6_hosts = dict()
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for host in r['status']:
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hostname=host['hostName']
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for addr in host['addresses']:
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ipv6_hosts[hostname] = []
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if addr['family'] == 'IPv6' and addr['scope'] == 'global':
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ipv6_hosts[hostname].append(addr['ipAddress'])
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return ipv6_hosts
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def get_wan_addr():
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r = sysbus.requete('NMC:getWANStatus')
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wan = dict()
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wan['ipv4'] = r['data']['IPAddress']
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wan['ipv6'] = r['data']['IPv6Address']
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return wan
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def full_name(host, domain):
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host = host.replace('_', '-')
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return '.'.join([host, domain])
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def make_zone_list(wan_hostname, wan_addr, hosts, hosts_nat, domain):
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zone = []
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wan_hostname = full_name(wan_hostname, domain)
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if wan_addr['ipv4'] != '':
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zone.append([wan_hostname, 'A', wan_addr['ipv4']])
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for host in hosts_nat:
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zone.append([full_name(host, domain), 'A', wan_addr['ipv4']])
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if wan_addr['ipv6'] != '':
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zone.append([wan_hostname, 'AAAA', wan_addr['ipv6']])
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for host in hosts:
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for addr in hosts[host]:
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if host in hosts_list:
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zone.append([full_name(host, domain), 'AAAA', addr])
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return zone
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def read_zone_list_from_file(zone_filename):
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zone_list = []
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config = configparser.ConfigParser()
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config.read(zone_filename)
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for host in config:
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for p in config[host]:
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zone_list.append([host, p.upper(), config[host][p]])
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return zone_list
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def make_update_zone_list(zone_list, prev_zone_list):
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update_zone_list = []
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for entry in zone_list:
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if not any(entry == x for x in prev_zone_list):
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update_zone_list.append(entry)
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return update_zone_list
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def write_zone_list_to_file(zone_filename, zone_list):
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config = configparser.ConfigParser()
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for host,typefield,target in zone_list:
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if not host in config:
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config[host] = {}
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config[host][typefield] = target
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with open(zone_filename, 'w') as configfile:
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config.write(configfile)
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def log(msg):
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stamp = time.strftime("%Y-%m-%d %H:%M:%S")
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with open(log_filename, 'a') as logfile:
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for line in msg.split('\n'):
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logfile.write("%s - %s\n" % (stamp, msg))
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def log_update_zone(zone_list):
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for host,typea,addr in zone_list:
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log("%-20s %-6s %s" % (host, typea, addr))
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def ovh_update_zone(domain, zone_list):
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if not len(zone_list):
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return False
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client = ovh.Client()
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for host, fieldtype, target in zone_list:
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result = client.get('/domain/zone/%s/record' % domain,
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fieldType=fieldtype,
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subDomain=host)
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if len(result) == 0:
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#print("Create new entry for %s %s %s" % (host, fieldtype, target))
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client.post('/domain/zone/%s/record' % domain,
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fieldType=fieldtype,
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subDomain=host,
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target=target,
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ttl=60)
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else:
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id = result[0]
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#print("Update entry for %s %s %s" % (host, fieldtype, target))
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client.put('/domain/zone/%s/record/%ld' % (domain, id),
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target=target)
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#print("Refresh zone %s" % domain)
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client.post('/domain/zone/%s/refresh' % domain)
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return True
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def send_update_mail(mail_to, mail_from, zone_domain, update_zone_list, wan):
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#print('Send email to %s' % mail_to)
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msg = EmailMessage()
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msg['Subject'] = "Livebox update in %s" % zone_domain
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msg['From'] = mail_from
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msg['To' ] = mail_to
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txt = "Livebox update\n\n"
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txt = txt + "WAN IPv4 : %s\n" % wan['ipv4']
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txt = txt + "WAN IPv6 : %s\n" % wan['ipv6']
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txt = txt + "\nZone %s has been updated:\n" % zone_domain
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for host,tp,addr in update_zone_list:
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txt = txt + " %-20s %-4s %s\n" % (host,tp,addr)
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txt = txt + '\n'
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msg.set_content(txt)
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s = smtplib.SMTP('localhost')
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s.send_message(msg)
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s.quit()
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load_conf()
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if not ping(wan_hostname):
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log("%s is down" % wan_hostname)
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sys.exit(0)
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sysbus.load_conf()
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sysbus.auth()
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hosts = get_ipv6_hosts()
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wan = get_wan_addr()
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zone_list = make_zone_list(wan_hostname, wan, hosts, hosts_ipv4_nat_list, zone_subdomain)
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prev_zone_list = read_zone_list_from_file(zone_filename)
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update_zone_list = make_update_zone_list(zone_list, prev_zone_list)
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#print('zone_list:')
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#pprint(zone_list)
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#print('prev_zone_list:')
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#pprint(prev_zone_list)
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#print('update_zone_list:')
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#pprint(update_zone_list)
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log_update_zone(update_zone_list)
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sucess = ovh_update_zone(zone_domain, update_zone_list)
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if sucess:
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new_zone_list = write_zone_list_to_file(zone_filename, prev_zone_list+update_zone_list)
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send_update_mail(mail_to, mail_from, zone_domain, update_zone_list, wan)
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