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# Copyright 2018, 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/>. # from collections import namedtuple from .context import ContextWrapper from .descriptors import DiffResultDescriptor from .difference import Difference, Wrapper modified_ibendportcon_record = namedtuple("modified_ibendportcon", ["rule", "added_context", "removed_context"]) class IbendportconsDifference(Difference): """Determine the difference in ibendportcons between two policies.""" added_ibendportcons = DiffResultDescriptor("diff_ibendportcons") removed_ibendportcons = DiffResultDescriptor("diff_ibendportcons") modified_ibendportcons = DiffResultDescriptor("diff_ibendportcons") def diff_ibendportcons(self): """Generate the difference in ibendportcons between the policies.""" self.log.info( "Generating ibendportcon differences from {0.left_policy} to {0.right_policy}". format(self)) self.added_ibendportcons, self.removed_ibendportcons, matched_ibendportcons = \ self._set_diff( (IbendportconWrapper(n) for n in self.left_policy.ibendportcons()), (IbendportconWrapper(n) for n in self.right_policy.ibendportcons())) self.modified_ibendportcons = [] for left_ibep, right_ibep in matched_ibendportcons: # Criteria for modified ibendportcons # 1. change to context if ContextWrapper(left_ibep.context) != ContextWrapper(right_ibep.context): self.modified_ibendportcons.append( modified_ibendportcon_record(left_ibep, right_ibep.context, left_ibep.context)) # # Internal functions # def _reset_diff(self): """Reset diff results on policy changes.""" self.log.debug("Resetting ibendportcon differences") self.added_ibendportcons = None self.removed_ibendportcons = None self.modified_ibendportcons = None class IbendportconWrapper(Wrapper): """Wrap ibendportcon statements for diff purposes.""" __slots__ = ("name", "port") def __init__(self, ocon): self.origin = ocon self.name = ocon.name self.port = ocon.port self.key = hash(ocon) def __hash__(self): return self.key def __lt__(self, other): return self.origin < other.origin def __eq__(self, other): return self.name == other.name and \ self.port == other.port