Attachment 10903 Details for Bug 54339

[patch] patch (https://git.knut.univention.de/univention/ucs/-/merge_requests/242)

54339.patch (text/plain), 2.49 KB, created by Florian Best on 2022-01-14 15:06 CET

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Creator: Florian Best

Created: 2022-01-14 15:06 CET

Size: 2.49 KB

patch

obsolete

>commit a73196ba2ee402abf9687c9553132116c5249317
>Author: Florian Best <best@univention.de>
>Date:   Fri Jan 14 15:02:29 2022 +0100
>
>    WIP: Bug #54339: allow to search for dns/ptr_record ip=$address
>    
>    The property "ip" of a dns/ptr_record is not part of the mapping and therefore not evaluated in a filter.
>    Therefor the filter needs to be manually rewritten in the UDM module.
>    
>    This is not quite easy as the IP address is not part of the dns/ptr_records LDAP attributes - only the address (relativeDomainName) and the subnet reverse address (zoneName). The IP is constructed virtually.
>    
>    So we have to search for the host parts of the given IP address only in the reverse zones matching the subnet.
>    But we don't know the subnet - the IP address in your filter doesn't contain a subnet mask.
>    
>    And in real life there could be more subnet masks as the common /8 and /16 and /24 and 32.
>    We could search for every possible combination - but this would be a large LDAP filter.
>
>diff --git management/univention-directory-manager-modules/modules/univention/admin/handlers/dns/ptr_record.py management/univention-directory-manager-modules/modules/univention/admin/handlers/dns/ptr_record.py
>index 18a9575870..b54e82ac60 100644
>--- management/univention-directory-manager-modules/modules/univention/admin/handlers/dns/ptr_record.py
>+++ management/univention-directory-manager-modules/modules/univention/admin/handlers/dns/ptr_record.py
>@@ -213,6 +213,22 @@ class object(univention.admin.handlers.simpleLdap):
> 		super(object, self)._ldap_post_remove()
> 		self._updateZone()
> 
>+	@classmethod
>+	def rewrite_filter(cls, filter, mapping):
>+		if filter.variable == 'ip':
>+			filter.variable = 'relativeDomainName'
>+			if ':' in filter.value:
>+				addr = ipaddress.IPv6Address(u'%s' % (filter.value,))
>+				raise NotImplementedError('IPv6')
>+			else:
>+				subnets = [ipaddress.IPv4Interface(u'%s/%d' % (filter.value, netmask)) for netmask in (24, 16, 8)]
>+				subnets = [s.network.network_address.compressed.replace('.0', '') for s in subnets]
>+			filter.transform_to_conjunction(univention.admin.filter.conjunction('|', [
>+				rewrite_rev(expression('ip', filter.value), subnet=subnet) for subnet in subnets
>+			]))
>+		else:
>+			super(object, cls).rewrite_filter(filter, mapping)
>+
> 	@classmethod
> 	def lookup_filter_superordinate(cls, filter, superordinate):
> 		filter.expressions.append(univention.admin.filter.expression('zoneName', superordinate.mapping.mapValueDecoded('subnet', superordinate['subnet']), escape=True))

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Attachments on bug 54339: 10903