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# -*- coding: utf-8 -*- # # Copyright (C) 2015-2016 Red Hat, Inc. # # Authors: # Thomas Woerner <twoerner@redhat.com> # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program 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 General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. # """helper backend""" __all__ = [ "FirewallHelper" ] from firewall import errors from firewall.errors import FirewallError class FirewallHelper(object): def __init__(self, fw): self._fw = fw self._helpers = { } def __repr__(self): return '%s(%r)' % (self.__class__, self._helpers) # helpers def cleanup(self): self._helpers.clear() def check_helper(self, name): if name not in self.get_helpers(): raise FirewallError(errors.INVALID_HELPER, name) def query_helper(self, name): return name in self.get_helpers() def get_helpers(self): return sorted(self._helpers.keys()) def has_helpers(self): return len(self._helpers) > 0 def get_helper(self, name): self.check_helper(name) return self._helpers[name] def add_helper(self, obj): self._helpers[obj.name] = obj def remove_helper(self, name): if name not in self._helpers: raise FirewallError(errors.INVALID_HELPER, name) del self._helpers[name]