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98 lines
2.6 KiB
Python
98 lines
2.6 KiB
Python
from django.db import models
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from django.urls import reverse
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from django.utils.translation import gettext as _
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from ipam.constants import *
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from netbox.models import PrimaryModel
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__all__ = (
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'RouteTarget',
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'VRF',
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)
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class VRF(PrimaryModel):
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"""
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A virtual routing and forwarding (VRF) table represents a discrete layer three forwarding domain (e.g. a routing
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table). Prefixes and IPAddresses can optionally be assigned to VRFs. (Prefixes and IPAddresses not assigned to a VRF
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are said to exist in the "global" table.)
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"""
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name = models.CharField(
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max_length=100
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)
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rd = models.CharField(
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max_length=VRF_RD_MAX_LENGTH,
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unique=True,
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blank=True,
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null=True,
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verbose_name='Route distinguisher',
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help_text=_('Unique route distinguisher (as defined in RFC 4364)')
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)
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tenant = models.ForeignKey(
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to='tenancy.Tenant',
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on_delete=models.PROTECT,
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related_name='vrfs',
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blank=True,
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null=True
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)
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enforce_unique = models.BooleanField(
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default=True,
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verbose_name='Enforce unique space',
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help_text=_('Prevent duplicate prefixes/IP addresses within this VRF')
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)
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import_targets = models.ManyToManyField(
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to='ipam.RouteTarget',
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related_name='importing_vrfs',
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blank=True
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)
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export_targets = models.ManyToManyField(
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to='ipam.RouteTarget',
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related_name='exporting_vrfs',
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blank=True
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)
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clone_fields = (
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'tenant', 'enforce_unique', 'description',
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)
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class Meta:
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ordering = ('name', 'rd', 'pk') # (name, rd) may be non-unique
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verbose_name = 'VRF'
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verbose_name_plural = 'VRFs'
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def __str__(self):
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if self.rd:
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return f'{self.name} ({self.rd})'
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return self.name
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def get_absolute_url(self):
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return reverse('ipam:vrf', args=[self.pk])
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class RouteTarget(PrimaryModel):
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"""
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A BGP extended community used to control the redistribution of routes among VRFs, as defined in RFC 4364.
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"""
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name = models.CharField(
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max_length=VRF_RD_MAX_LENGTH, # Same format options as VRF RD (RFC 4360 section 4)
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unique=True,
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help_text=_('Route target value (formatted in accordance with RFC 4360)')
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)
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tenant = models.ForeignKey(
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to='tenancy.Tenant',
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on_delete=models.PROTECT,
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related_name='route_targets',
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blank=True,
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null=True
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)
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class Meta:
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ordering = ['name']
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def __str__(self):
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return self.name
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def get_absolute_url(self):
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return reverse('ipam:routetarget', args=[self.pk])
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