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# Copyright 2014-2015, Tresys Technology, LLC # # 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 logging import re from .query import PolicyQuery from .descriptors import CriteriaDescriptor, CriteriaSetDescriptor from .mixins import MatchObjClass from .policyrep import DefaultRuletype, DefaultValue, DefaultRangeValue class DefaultQuery(MatchObjClass, PolicyQuery): """ Query default_* statements. Parameter: policy The policy to query. Keyword Parameters/Class attributes: ruletype The rule type(s) to match. tclass The object class(es) to match. tclass_regex If true, use a regular expression for matching the rule's object class. default The default to base new contexts (e.g. "source" or "target") default_range The range to use on new context, default_range only ("low", "high", "low_high") """ ruletype = CriteriaSetDescriptor(enum_class=DefaultRuletype) default = CriteriaDescriptor(enum_class=DefaultValue) default_range = CriteriaDescriptor(enum_class=DefaultRangeValue) def __init__(self, policy, **kwargs): super(DefaultQuery, self).__init__(policy, **kwargs) self.log = logging.getLogger(__name__) def results(self): """Generator which yields all matching default_* statements.""" self.log.info("Generating default_* results from {0.policy}".format(self)) self.log.debug("Ruletypes: {0.ruletype!r}".format(self)) self._match_object_class_debug(self.log) self.log.debug("Default: {0.default!r}".format(self)) self.log.debug("Range: {0.default_range!r}".format(self)) for d in self.policy.defaults(): if self.ruletype and d.ruletype not in self.ruletype: continue if not self._match_object_class(d): continue if self.default and d.default != self.default: continue if self.default_range: try: if d.default_range != self.default_range: continue except AttributeError: continue yield d