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✏️ nodeconquery.py

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# Copyright 2014-2015, Tresys Technology, LLC
# Copyright 2017, Chris PeBenito <pebenito@ieee.org>
#
# This file is part of SETools.
#
# SETools is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 2.1 of
# the License, or (at your option) any later version.
#
# SETools 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with SETools.  If not, see
# <http://www.gnu.org/licenses/>.
#
import ipaddress

import logging
from socket import AF_INET, AF_INET6

from .mixins import MatchContext
from .policyrep import NodeconIPVersion
from .query import PolicyQuery

class NodeconQuery(MatchContext, PolicyQuery):

"""
    Query nodecon statements.

Parameter:
    policy          The policy to query.

Keyword Parameters/Class attributes:
    network         The IPv4/IPv6 address or IPv4/IPv6 network address
                    with netmask, e.g. 192.168.1.0/255.255.255.0 or
                    "192.168.1.0/24".
    network_overlap If true, the net will match if it overlaps with
                    the nodecon's network instead of equality.
    ip_version      The IP version of the nodecon to match. (socket.AF_INET
                    for IPv4 or socket.AF_INET6 for IPv6)
    user            The criteria to match the context's user.
    user_regex      If true, regular expression matching
                    will be used on the user.
    role            The criteria to match the context's role.
    role_regex      If true, regular expression matching
                    will be used on the role.
    type_           The criteria to match the context's type.
    type_regex      If true, regular expression matching
                    will be used on the type.
    range_          The criteria to match the context's range.
    range_subset    If true, the criteria will match if it is a subset
                    of the context's range.
    range_overlap   If true, the criteria will match if it overlaps
                    any of the context's range.
    range_superset  If true, the criteria will match if it is a superset
                    of the context's range.
    range_proper    If true, use proper superset/subset operations.
                    No effect if not using set operations.
    """

_network = None
    network_overlap = False
    _ip_version = None

@property
    def ip_version(self):
        return self._ip_version

@ip_version.setter
    def ip_version(self, value):
        if value:
            self._ip_version = NodeconIPVersion.lookup(value)
        else:
            self._ip_version = None

@property
    def network(self):
        return self._network

@network.setter
    def network(self, value):
        if value:
            self._network = ipaddress.ip_network(value)
        else:
            self._network = None

def __init__(self, policy, **kwargs):
        super(NodeconQuery, self).__init__(policy, **kwargs)
        self.log = logging.getLogger(__name__)

def results(self):
        """Generator which yields all matching nodecons."""
        self.log.info("Generating nodecon results from {0.policy}".format(self))
        self.log.debug("Network: {0.network!r}, overlap: {0.network_overlap}".format(self))
        self.log.debug("IP Version: {0.ip_version!r}".format(self))
        self._match_context_debug(self.log)

for nodecon in self.policy.nodecons():

if self.network:
                if self.network_overlap:
                    if not self.network.overlaps(nodecon.network):
                        continue
                else:
                    if not nodecon.network == self.network:
                        continue

if self.ip_version and self.ip_version != nodecon.ip_version:
                continue

if not self._match_context(nodecon.context):
                continue

yield nodecon

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✏️ nodeconquery.py