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re2o/topologie/models.py

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5.8 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 django.db import models
from django.db.models.signals import post_delete
from django.dispatch import receiver
from django.forms import ModelForm, Form
from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes.fields import GenericForeignKey
from django.core.exceptions import ValidationError
import reversion
from machines.models import Vlan
def make_port_related(port):
related_port = port.related
related_port.related = port
related_port.save()
def clean_port_related(port):
related_port = port.related_port
related_port.related = None
related_port.save()
class Stack(models.Model):
PRETTY_NAME = "Stack de switchs"
name = models.CharField(max_length=32, blank=True, null=True)
stack_id = models.CharField(max_length=32, unique=True)
details = models.CharField(max_length=255, blank=True, null=True)
member_id_min = models.IntegerField()
member_id_max = models.IntegerField()
def __str__(self):
return " ".join([self.name, self.stack_id])
def save(self, *args, **kwargs):
if not self.name:
self.name = self.stack_id
super(Stack, self).save(*args, **kwargs)
def clean(self):
if self.member_id_max < self.member_id_min:
raise ValidationError({'member_id_max':"L'id maximale est inférieure à l'id minimale"})
class Switch(models.Model):
PRETTY_NAME = "Switch / Commutateur"
switch_interface = models.OneToOneField('machines.Interface', on_delete=models.CASCADE)
location = models.CharField(max_length=255)
number = models.IntegerField()
details = models.CharField(max_length=255, blank=True)
stack = models.ForeignKey(Stack, blank=True, null=True, on_delete=models.SET_NULL)
stack_member_id = models.IntegerField(blank=True, null=True)
class Meta:
unique_together = ('stack','stack_member_id')
def __str__(self):
return str(self.location) + ' ' + str(self.switch_interface)
def clean(self):
if self.stack is not None:
if self.stack_member_id is not None:
if (self.stack_member_id > self.stack.member_id_max) or (self.stack_member_id < self.stack.member_id_min):
raise ValidationError({'stack_member_id': "L'id de ce switch est en dehors des bornes permises pas la stack"})
else:
raise ValidationError({'stack_member_id': "L'id dans la stack ne peut être nul"})
class Port(models.Model):
PRETTY_NAME = "Port de switch"
STATES_BASE = (
('NO', 'NO'),
('STRICT', 'STRICT'),
('BLOQ', 'BLOQ'),
('COMMON', 'COMMON'),
)
try:
STATES = STATES_BASE + tuple([(str(id), str(id)) for id in list(Vlan.objects.values_list('vlan_id', flat=True).order_by('vlan_id'))])
except:
STATES = STATES_BASE
switch = models.ForeignKey('Switch', related_name="ports")
port = models.IntegerField()
room = models.ForeignKey('Room', on_delete=models.PROTECT, blank=True, null=True)
machine_interface = models.ForeignKey('machines.Interface', on_delete=models.SET_NULL, blank=True, null=True)
related = models.OneToOneField('self', null=True, blank=True, related_name='related_port')
radius = models.CharField(max_length=32, choices=STATES, default='NO')
details = models.CharField(max_length=255, blank=True)
class Meta:
unique_together = ('switch', 'port')
def clean(self):
if hasattr(self, 'switch'):
if self.port > self.switch.number:
raise ValidationError("Ce port ne peut exister, numero trop élevé")
if self.room and self.machine_interface or self.room and self.related or self.machine_interface and self.related:
raise ValidationError("Chambre, interface et related_port sont mutuellement exclusifs")
if self.related==self:
raise ValidationError("On ne peut relier un port à lui même")
if self.related and not self.related.related:
if self.related.machine_interface or self.related.room:
raise ValidationError("Le port relié est déjà occupé, veuillez le libérer avant de créer une relation")
else:
make_port_related(self)
elif hasattr(self, 'related_port'):
clean_port_related(self)
def __str__(self):
return str(self.switch) + " - " + str(self.port)
class Room(models.Model):
PRETTY_NAME = "Chambre/ Prise murale"
name = models.CharField(max_length=255, unique=True)
details = models.CharField(max_length=255, blank=True)
class Meta:
ordering = ['name']
def __str__(self):
return str(self.name)
@receiver(post_delete, sender=Stack)
def stack_post_delete(sender, **kwargs):
Switch.objects.filter(stack=None).update(stack_member_id = None)