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Name	Size	Permission	Action
__pycache__	[ DIR ]	drwxr-xr-x
__init__.py	3.15 KB	-rw-r--r--
bool.py	3.05 KB	-rw-r--r--
bounds.py	4.41 KB	-rw-r--r--
commons.py	2.77 KB	-rw-r--r--
conditional.py	1.95 KB	-rw-r--r--
constraints.py	8.92 KB	-rw-r--r--
context.py	2.08 KB	-rw-r--r--
default.py	4.26 KB	-rw-r--r--
descriptors.py	1.66 KB	-rw-r--r--
difference.py	6.04 KB	-rw-r--r--
fsuse.py	3.21 KB	-rw-r--r--
genfscon.py	3.38 KB	-rw-r--r--
ibendportcon.py	3.3 KB	-rw-r--r--
ibpkeycon.py	3.31 KB	-rw-r--r--
initsid.py	2.58 KB	-rw-r--r--
mls.py	10.82 KB	-rw-r--r--
mlsrules.py	5.27 KB	-rw-r--r--
netifcon.py	3.77 KB	-rw-r--r--
nodecon.py	3.31 KB	-rw-r--r--
objclass.py	3.7 KB	-rw-r--r--
polcap.py	1.72 KB	-rw-r--r--
portcon.py	3.29 KB	-rw-r--r--
properties.py	2.4 KB	-rw-r--r--
rbacrules.py	7.22 KB	-rw-r--r--
roles.py	3.28 KB	-rw-r--r--
terules.py	24.91 KB	-rw-r--r--
typeattr.py	3.42 KB	-rw-r--r--
types.py	4.79 KB	-rw-r--r--
typing.py	1.02 KB	-rw-r--r--
users.py	5.97 KB	-rw-r--r--

Code Editor : netifcon.py

# Copyright 2016, 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/>.
#
from typing import NamedTuple, Optional

from ..policyrep import Context, Netifcon

from .context import ContextWrapper
from .descriptors import DiffResultDescriptor
from .difference import Difference, Wrapper

class ModifiedNetifcon(NamedTuple):

"""Difference details for a modified netifcon."""

rule: Netifcon
    added_context: Optional[Context]
    removed_context: Optional[Context]
    added_packet: Optional[Context]
    removed_packet: Optional[Context]

class NetifconsDifference(Difference):

"""Determine the difference in netifcons between two policies."""

added_netifcons = DiffResultDescriptor("diff_netifcons")
    removed_netifcons = DiffResultDescriptor("diff_netifcons")
    modified_netifcons = DiffResultDescriptor("diff_netifcons")

def diff_netifcons(self) -> None:
        """Generate the difference in netifcons between the policies."""

self.log.info("Generating netifcon differences from {0.left_policy} to {0.right_policy}".
                      format(self))

self.added_netifcons, self.removed_netifcons, matched_netifcons = self._set_diff(
            (NetifconWrapper(n) for n in self.left_policy.netifcons()),
            (NetifconWrapper(n) for n in self.right_policy.netifcons()))

self.modified_netifcons = []

for left_netifcon, right_netifcon in matched_netifcons:
            # Criteria for modified netifcons
            # 1. change to context
            # 2. change to packet context
            if ContextWrapper(left_netifcon.context) != ContextWrapper(right_netifcon.context):
                removed_context = left_netifcon.context
                added_context = right_netifcon.context
            else:
                removed_context = None
                added_context = None

if ContextWrapper(left_netifcon.packet) != ContextWrapper(right_netifcon.packet):
                removed_packet = left_netifcon.packet
                added_packet = right_netifcon.packet
            else:
                removed_packet = None
                added_packet = None

if removed_context or removed_packet:
                self.modified_netifcons.append(ModifiedNetifcon(
                    left_netifcon, added_context, removed_context, added_packet, removed_packet))

#
    # Internal functions
    #
    def _reset_diff(self) -> None:
        """Reset diff results on policy changes."""
        self.log.debug("Resetting netifcon differences")
        self.added_netifcons = None
        self.removed_netifcons = None
        self.modified_netifcons = None

# Pylint bug: https://github.com/PyCQA/pylint/issues/2822
class NetifconWrapper(Wrapper[Netifcon]):  # pylint: disable=unsubscriptable-object

"""Wrap netifcon statements for diff purposes."""

__slots__ = ("netif")

def __init__(self, ocon: Netifcon) -> None:
        self.origin = ocon
        self.netif = ocon.netif
        self.key = hash(ocon)

def __hash__(self):
        return self.key

def __lt__(self, other):
        return self.netif < other.netif

def __eq__(self, other):
        return self.netif == other.netif

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