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/* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
* Copyright (C) 1997 by the University of Southern California
* $Id: filter.h,v 1.7 2005/08/25 18:58:02 johnh Exp $
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* 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, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
*
* The copyright of this module includes the following
* linking-with-specific-other-licenses addition:
*
* In addition, as a special exception, the copyright holders of
* this module give you permission to combine (via static or
* dynamic linking) this module with free software programs or
* libraries that are released under the GNU LGPL and with code
* included in the standard release of ns-2 under the Apache 2.0
* license or under otherwise-compatible licenses with advertising
* requirements (or modified versions of such code, with unchanged
* license). You may copy and distribute such a system following the
* terms of the GNU GPL for this module and the licenses of the
* other code concerned, provided that you include the source code of
* that other code when and as the GNU GPL requires distribution of
* source code.
*
* Note that people who make modified versions of this module
* are not obligated to grant this special exception for their
* modified versions; it is their choice whether to do so. The GNU
* General Public License gives permission to release a modified
* version without this exception; this exception also makes it
* possible to release a modified version which carries forward this
* exception.
*
*/
/*
* @(#) $Header: /cvsroot/nsnam/ns-2/classifier/filter.h,v 1.7 2005/08/25 18:58:02 johnh Exp $ (USC/ISI)
*/
#ifndef ns_filter_h
#define ns_filter_h
#include "connector.h"
class Filter : public Connector {
public:
Filter();
inline NsObject* filter_target() { return filter_target_; }
enum filter_e { DROP, PASS, FILTER, DUPLIC };
protected:
virtual filter_e filter(Packet* p);
int command(int argc, const char* const* argv);
void recv(Packet*, Handler* h= 0);
NsObject* filter_target_; // target for the matching packets
};
class FieldFilter : public Filter {
public:
FieldFilter();
protected:
filter_e filter(Packet *p);
int offset_; // offset of the field
int match_;
};
struct fieldobj {
int offset;
int match;
fieldobj *next;
};
/* 10-5-98, Polly Huang, Filters that filter on multiple fields */
class MultiFieldFilter : public Filter {
public:
MultiFieldFilter();
protected:
int command(int argc, const char*const* argv);
filter_e filter(Packet *p);
void add_field(fieldobj *p);
fieldobj* field_list_;
};
#endif
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