mirror of
https://github.com/peeringdb/peeringdb.git
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105 lines
3.0 KiB
Python
105 lines
3.0 KiB
Python
"""
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peeringdb model / field validators
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"""
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import ipaddress
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from django.conf import settings
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from django.core.exceptions import ValidationError
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from django.utils.translation import ugettext_lazy as _
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from peeringdb_server.inet import network_is_pdb_valid
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import peeringdb_server.models
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def validate_prefix(prefix):
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"""
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validate ip prefix
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Arguments:
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- prefix: ipaddress.IPv4Network or an ipaddress.IPv6Network
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Raises:
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- ValidationError on failed validation
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Returns:
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- ipaddress.ip_network instance
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"""
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if isinstance(prefix, unicode):
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try:
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prefix = ipaddress.ip_network(prefix)
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except ValueError as exc:
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raise ValidationError(_("Invalid prefix: {}").format(prefix))
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return prefix
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def validate_address_space(prefix):
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"""
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validate an ip prefix according to peeringdb specs
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Arguments:
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- prefix: ipaddress.IPv4Network or an ipaddress.IPv6Network
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Raises:
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- ValidationError on failed validation
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"""
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prefix = validate_prefix(prefix)
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if not network_is_pdb_valid(prefix):
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raise ValidationError(_("Address space invalid: {}").format(prefix))
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prefixlen_min = getattr(settings, "DATA_QUALITY_MIN_PREFIXLEN_V{}".format(prefix.version))
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prefixlen_max = getattr(settings, "DATA_QUALITY_MAX_PREFIXLEN_V{}".format(prefix.version))
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if prefix.prefixlen < prefixlen_min:
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raise ValidationError(
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_("Maximum allowed prefix length is {}").format(prefixlen_min))
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elif prefix.prefixlen > prefixlen_max:
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raise ValidationError(
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_("Minimum allowed prefix length is {}").format(prefixlen_max))
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def validate_info_prefixes4(value):
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if value > settings.DATA_QUALITY_MAX_PREFIX_V4_LIMIT:
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raise ValidationError(
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_("Maximum value allowed {}").format(
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settings.DATA_QUALITY_MAX_PREFIX_V4_LIMIT))
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if value < 0:
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raise ValidationError(_("Negative value not allowed"))
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def validate_info_prefixes6(value):
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if value > settings.DATA_QUALITY_MAX_PREFIX_V6_LIMIT:
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raise ValidationError(
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_("Maximum value allowed {}").format(
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settings.DATA_QUALITY_MAX_PREFIX_V6_LIMIT))
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if value < 0:
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raise ValidationError(_("Negative value not allowed"))
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def validate_prefix_overlap(prefix):
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"""
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validate that a prefix does not overlap with another prefix
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on an already existing ixlan
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Arguments:
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- prefix: ipaddress.IPv4Network or an ipaddress.IPv6Network
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Raises:
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- ValidationError on failed validation
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"""
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prefix = validate_prefix(prefix)
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qs = peeringdb_server.models.IXLanPrefix.objects.filter(protocol="IPv{}".format(prefix.version),
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status="ok")
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qs = qs.exclude(prefix=prefix)
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for ixpfx in qs:
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if ixpfx.prefix.overlaps(prefix):
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raise ValidationError(_("Prefix overlaps with {}'s prefix: {}".format(
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ixpfx.ixlan.ix.name, ixpfx.prefix
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)))
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