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re2o/machines/models.py
2017-09-19 20:09:12 +00:00

487 lines
17 KiB
Python

# -*- mode: python; coding: utf-8 -*-
# Re2o est un logiciel d'administration développé initiallement au rezometz. Il
# se veut agnostique au réseau considéré, de manière à être installable en
# quelques clics.
#
# Copyright © 2017 Gabriel Détraz
# Copyright © 2017 Goulven Kermarec
# Copyright © 2017 Augustin Lemesle
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
from __future__ import unicode_literals
from django.db import models
from django.db.models.signals import post_save, pre_delete, post_delete
from django.dispatch import receiver
from django.forms import ValidationError
from django.utils.functional import cached_property
from django.utils import timezone
from macaddress.fields import MACAddressField
from netaddr import mac_bare, EUI, IPSet, IPRange, IPNetwork, IPAddress
from django.core.validators import MinValueValidator,MaxValueValidator
import re
from reversion import revisions as reversion
from datetime import timedelta
class Machine(models.Model):
""" Class définissant une machine, object parent user, objets fils interfaces"""
PRETTY_NAME = "Machine"
user = models.ForeignKey('users.User', on_delete=models.PROTECT)
name = models.CharField(max_length=255, help_text="Optionnel", blank=True, null=True)
active = models.BooleanField(default=True)
def __str__(self):
return str(self.user) + ' - ' + str(self.id) + ' - ' + str(self.name)
class MachineType(models.Model):
""" Type de machine, relié à un type d'ip, affecté aux interfaces"""
PRETTY_NAME = "Type de machine"
type = models.CharField(max_length=255)
ip_type = models.ForeignKey('IpType', on_delete=models.PROTECT, blank=True, null=True)
def all_interfaces(self):
return Interface.objects.filter(type=self)
def __str__(self):
return self.type
class IpType(models.Model):
""" Type d'ip, définissant un range d'ip, affecté aux machine types"""
PRETTY_NAME = "Type d'ip"
type = models.CharField(max_length=255)
extension = models.ForeignKey('Extension', on_delete=models.PROTECT)
need_infra = models.BooleanField(default=False)
domaine_ip_start = models.GenericIPAddressField(protocol='IPv4')
domaine_ip_stop = models.GenericIPAddressField(protocol='IPv4')
vlan = models.ForeignKey('Vlan', on_delete=models.PROTECT, blank=True, null=True)
@cached_property
def ip_range(self):
return IPRange(self.domaine_ip_start, end=self.domaine_ip_stop)
@cached_property
def ip_set(self):
return IPSet(self.ip_range)
@cached_property
def ip_set_as_str(self):
return [str(x) for x in self.ip_set]
def ip_objects(self):
return IpList.objects.filter(ip_type=self)
def free_ip(self):
return IpList.objects.filter(interface__isnull=True).filter(ip_type=self)
def gen_ip_range(self):
# Creation du range d'ip dans les objets iplist
networks = []
for net in self.ip_range.cidrs():
networks += net.iter_hosts()
ip_obj = [IpList(ip_type=self, ipv4=str(ip)) for ip in networks]
listes_ip = IpList.objects.filter(ipv4__in=[str(ip) for ip in networks])
# Si il n'y a pas d'ip, on les crée
if not listes_ip:
IpList.objects.bulk_create(ip_obj)
# Sinon on update l'ip_type
else:
listes_ip.update(ip_type=self)
return
def del_ip_range(self):
""" Methode dépréciée, IpList est en mode cascade et supprimé automatiquement"""
if Interface.objects.filter(ipv4__in=self.ip_objects()):
raise ValidationError("Une ou plusieurs ip du range sont affectées, impossible de supprimer le range")
for ip in self.ip_objects():
ip.delete()
def clean(self):
if IPAddress(self.domaine_ip_start) > IPAddress(self.domaine_ip_stop):
raise ValidationError("Domaine end doit être après start...")
# On ne crée pas plus grand qu'un /16
if self.ip_range.size > 65536:
raise ValidationError("Le range est trop gros, vous ne devez pas créer plus grand qu'un /16")
# On check que les / ne se recoupent pas
for element in IpType.objects.all().exclude(pk=self.pk):
if not self.ip_set.isdisjoint(element.ip_set):
raise ValidationError("Le range indiqué n'est pas disjoint des ranges existants")
return
def save(self, *args, **kwargs):
self.clean()
super(IpType, self).save(*args, **kwargs)
def __str__(self):
return self.type
class Vlan(models.Model):
PRETTY_NAME = "Vlans"
vlan_id = models.IntegerField()
name = models.CharField(max_length=256)
comment = models.CharField(max_length=256, blank=True)
def __str__(self):
return self.name
class Nas(models.Model):
PRETTY_NAME = "Correspondance entre les nas et les machines connectées"
default_mode = '802.1X'
AUTH = (
('802.1X', '802.1X'),
('Mac-address', 'Mac-address'),
)
name = models.CharField(max_length=255, unique=True)
nas_type = models.ForeignKey('MachineType', on_delete=models.PROTECT, related_name='nas_type')
machine_type = models.ForeignKey('MachineType', on_delete=models.PROTECT, related_name='machinetype_on_nas')
port_access_mode = models.CharField(choices=AUTH, default=default_mode, max_length=32)
autocapture_mac = models.BooleanField(default=False)
def __str__(self):
return self.name
class Extension(models.Model):
PRETTY_NAME = "Extensions dns"
name = models.CharField(max_length=255, unique=True)
need_infra = models.BooleanField(default=False)
origin = models.OneToOneField('IpList', on_delete=models.PROTECT, blank=True, null=True)
@cached_property
def dns_entry(self):
return "@ IN A " + str(self.origin)
def __str__(self):
return self.name
class Mx(models.Model):
PRETTY_NAME = "Enregistrements MX"
zone = models.ForeignKey('Extension', on_delete=models.PROTECT)
priority = models.IntegerField(unique=True)
name = models.OneToOneField('Domain', on_delete=models.PROTECT)
@cached_property
def dns_entry(self):
return "@ IN MX " + str(self.priority) + " " + str(self.name)
def __str__(self):
return str(self.zone) + ' ' + str(self.priority) + ' ' + str(self.name)
class Ns(models.Model):
PRETTY_NAME = "Enregistrements NS"
zone = models.ForeignKey('Extension', on_delete=models.PROTECT)
ns = models.OneToOneField('Domain', on_delete=models.PROTECT)
@cached_property
def dns_entry(self):
return "@ IN NS " + str(self.ns)
def __str__(self):
return str(self.zone) + ' ' + str(self.ns)
class Text(models.Model):
PRETTY_NAME = "Enregistrement text"
zone = models.ForeignKey('Extension', on_delete=models.PROTECT)
field1 = models.CharField(max_length=255)
field2 = models.CharField(max_length=255)
def __str__(self):
return str(self.zone) + " : " + str(self.field1) + " " + str(self.field2)
@cached_property
def dns_entry(self):
return str(self.field1) + " IN TXT " + str(self.field2)
class Interface(models.Model):
PRETTY_NAME = "Interface"
ipv4 = models.OneToOneField('IpList', on_delete=models.PROTECT, blank=True, null=True)
#ipv6 = models.GenericIPAddressField(protocol='IPv6', null=True)
mac_address = MACAddressField(integer=False, unique=True)
machine = models.ForeignKey('Machine', on_delete=models.CASCADE)
type = models.ForeignKey('MachineType', on_delete=models.PROTECT)
details = models.CharField(max_length=255, blank=True)
@cached_property
def is_active(self):
""" Renvoie si une interface doit avoir accès ou non """
machine = self.machine
user = self.machine.user
return machine.active and user.has_access()
def mac_bare(self):
return str(EUI(self.mac_address, dialect=mac_bare)).lower()
def filter_macaddress(self):
try:
self.mac_address = str(EUI(self.mac_address))
except :
raise ValidationError("La mac donnée est invalide")
def clean(self, *args, **kwargs):
self.filter_macaddress()
self.mac_address = str(EUI(self.mac_address)) or None
if not self.ipv4 or self.type.ip_type != self.ipv4.ip_type:
self.assign_ipv4()
super(Interface, self).clean(*args, **kwargs)
def assign_ipv4(self):
""" Assigne une ip à l'interface """
free_ips = self.type.ip_type.free_ip()
if free_ips:
self.ipv4 = free_ips[0]
else:
raise ValidationError("Il n'y a plus d'ip disponibles dans le slash")
return
def unassign_ipv4(self):
self.ipv4 = None
def update_type(self):
""" Lorsque le machinetype est changé de type d'ip, on réassigne"""
self.clean()
self.save()
def save(self, *args, **kwargs):
self.filter_macaddress()
# On verifie la cohérence en forçant l'extension par la méthode
if self.type.ip_type != self.ipv4.ip_type:
raise ValidationError("L'ipv4 et le type de la machine ne correspondent pas")
super(Interface, self).save(*args, **kwargs)
def __str__(self):
try:
domain = self.domain
except:
domain = None
return str(domain)
class Domain(models.Model):
PRETTY_NAME = "Domaine dns"
interface_parent = models.OneToOneField('Interface', on_delete=models.CASCADE, blank=True, null=True)
name = models.CharField(help_text="Obligatoire et unique, ne doit pas comporter de points", max_length=255)
extension = models.ForeignKey('Extension', on_delete=models.PROTECT)
cname = models.ForeignKey('self', null=True, blank=True, related_name='related_domain')
class Meta:
unique_together = (("name", "extension"),)
def get_extension(self):
if self.interface_parent:
return self.interface_parent.type.ip_type.extension
elif hasattr(self,'extension'):
return self.extension
else:
return None
def clean(self):
if self.get_extension():
self.extension=self.get_extension()
""" Validation du nom de domaine, extensions dans type de machine, prefixe pas plus long que 63 caractères """
if self.interface_parent and self.cname:
raise ValidationError("On ne peut créer à la fois A et CNAME")
if self.cname==self:
raise ValidationError("On ne peut créer un cname sur lui même")
HOSTNAME_LABEL_PATTERN = re.compile("(?!-)[A-Z\d-]+(?<!-)$", re.IGNORECASE)
dns = self.name.lower()
if len(dns) > 63:
raise ValidationError("Le nom de domaine %s est trop long (maximum de 63 caractères)." % dns)
if not HOSTNAME_LABEL_PATTERN.match(dns):
raise ValidationError("Ce nom de domaine %s contient des carractères interdits." % dns)
self.validate_unique()
super(Domain, self).clean()
@cached_property
def dns_entry(self):
if self.cname:
return str(self.name) + " IN CNAME " + str(self.cname) + "."
def save(self, *args, **kwargs):
if not self.get_extension():
raise ValidationError("Extension invalide")
self.full_clean()
super(Domain, self).save(*args, **kwargs)
def __str__(self):
return str(self.name) + str(self.extension)
class IpList(models.Model):
PRETTY_NAME = "Addresses ipv4"
ipv4 = models.GenericIPAddressField(protocol='IPv4', unique=True)
ip_type = models.ForeignKey('IpType', on_delete=models.CASCADE)
@cached_property
def need_infra(self):
return self.ip_type.need_infra
def clean(self):
if not str(self.ipv4) in self.ip_type.ip_set_as_str:
raise ValidationError("L'ipv4 et le range de l'iptype ne correspondent pas!")
return
def save(self, *args, **kwargs):
self.clean()
super(IpList, self).save(*args, **kwargs)
def __str__(self):
return self.ipv4
class Service(models.Model):
""" Definition d'un service (dhcp, dns, etc)"""
service_type = models.CharField(max_length=255, blank=True, unique=True)
min_time_regen = models.DurationField(default=timedelta(minutes=1), help_text="Temps minimal avant nouvelle génération du service")
regular_time_regen = models.DurationField(default=timedelta(hours=1), help_text="Temps maximal avant nouvelle génération du service")
servers = models.ManyToManyField('Interface', through='Service_link')
def ask_regen(self):
""" Marque à True la demande de régénération pour un service x """
Service_link.objects.filter(service=self).exclude(asked_regen=True).update(asked_regen=True)
return
def process_link(self, servers):
""" Django ne peut créer lui meme les relations manytomany avec table intermediaire explicite"""
for serv in servers.exclude(pk__in=Interface.objects.filter(service=self)):
link = Service_link(service=self, server=serv)
link.save()
Service_link.objects.filter(service=self).exclude(server__in=servers).delete()
return
def save(self, *args, **kwargs):
super(Service, self).save(*args, **kwargs)
def __str__(self):
return str(self.service_type)
def regen(service):
""" Fonction externe pour régérération d'un service, prend un objet service en arg"""
obj = Service.objects.filter(service_type=service)
if obj:
obj[0].ask_regen()
return
class Service_link(models.Model):
""" Definition du lien entre serveurs et services"""
service = models.ForeignKey('Service', on_delete=models.CASCADE)
server = models.ForeignKey('Interface', on_delete=models.CASCADE)
last_regen = models.DateTimeField(auto_now_add=True)
asked_regen = models.BooleanField(default=False)
def done_regen(self):
""" Appellé lorsqu'un serveur a regénéré son service"""
self.last_regen = timezone.now()
self.asked_regen = False
self.save()
def need_regen(self):
""" Décide si le temps minimal écoulé est suffisant pour provoquer une régénération de service"""
if (self.asked_regen and (self.last_regen + self.service.min_time_regen) < timezone.now()) or (self.last_regen + self.service.regular_time_regen) < timezone.now():
return True
else:
return False
def __str__(self):
return str(self.server) + " " + str(self.service)
@receiver(post_save, sender=Machine)
def machine_post_save(sender, **kwargs):
user = kwargs['instance'].user
user.ldap_sync(base=False, access_refresh=False, mac_refresh=True)
regen('dhcp')
regen('mac_ip_list')
@receiver(post_delete, sender=Machine)
def machine_post_delete(sender, **kwargs):
machine = kwargs['instance']
user = machine.user
user.ldap_sync(base=False, access_refresh=False, mac_refresh=True)
regen('dhcp')
regen('mac_ip_list')
@receiver(post_save, sender=Interface)
def interface_post_save(sender, **kwargs):
interface = kwargs['instance']
user = interface.machine.user
user.ldap_sync(base=False, access_refresh=False, mac_refresh=True)
regen('dhcp')
regen('mac_ip_list')
@receiver(post_delete, sender=Interface)
def interface_post_delete(sender, **kwargs):
interface = kwargs['instance']
user = interface.machine.user
user.ldap_sync(base=False, access_refresh=False, mac_refresh=True)
@receiver(post_save, sender=IpType)
def iptype_post_save(sender, **kwargs):
iptype = kwargs['instance']
iptype.gen_ip_range()
@receiver(post_save, sender=MachineType)
def machine_post_save(sender, **kwargs):
machinetype = kwargs['instance']
for interface in machinetype.all_interfaces():
interface.update_type()
@receiver(post_save, sender=Domain)
def domain_post_save(sender, **kwargs):
regen('dns')
@receiver(post_delete, sender=Domain)
def domain_post_delete(sender, **kwargs):
regen('dns')
@receiver(post_save, sender=Extension)
def extension_post_save(sender, **kwargs):
regen('dns')
@receiver(post_delete, sender=Extension)
def extension_post_selete(sender, **kwargs):
regen('dns')
@receiver(post_save, sender=Mx)
def mx_post_save(sender, **kwargs):
regen('dns')
@receiver(post_delete, sender=Mx)
def mx_post_delete(sender, **kwargs):
regen('dns')
@receiver(post_save, sender=Ns)
def ns_post_save(sender, **kwargs):
regen('dns')
@receiver(post_delete, sender=Ns)
def ns_post_delete(sender, **kwargs):
regen('dns')
@receiver(post_save, sender=Text)
def text_post_save(sender, **kwargs):
regen('dns')
@receiver(post_delete, sender=Text)
def text_post_delete(sender, **kwargs):
regen('dns')