// -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*- // vim:set sts=4 ts=8: // Copyright (c) 2001-2006 International Computer Science Institute // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software") // to deal in the Software without restriction, subject to the conditions // listed in the XORP LICENSE file. These conditions include: you must // preserve this copyright notice, and you cannot mention the copyright // holders in advertising related to the Software without their permission. // The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This // notice is a summary of the XORP LICENSE file; the license in that file is // legally binding. // $XORP: xorp/policy/backend/filter_base.hh,v 1.2 2006/03/16 00:05:07 pavlin Exp $ #ifndef __POLICY_BACKEND_FILTER_BASE_HH__ #define __POLICY_BACKEND_FILTER_BASE_HH__ #include "policy/common/varrw.hh" #include <string> /** * @short Base class for all policy filters. */ class FilterBase { public: virtual ~FilterBase() {} /** * Configure the filter * * @param str filter configuration. */ virtual void configure(const string& str) = 0; /** * Reset the filter. * * Filter becomes a NO-operation -- default action should * be returned everytime an acceptRoute is called. */ virtual void reset() = 0; /** * See if a route is accepted by the filter. * The route may be modified by the filter [through VarRW]. * * @return true if the route is accepted, false otherwise. * @param varrw the VarRW associated with the route being filtered. */ virtual bool acceptRoute(VarRW& varrw) = 0; }; #endif // __POLICY_BACKEND_FILTER_BASE_HH__