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/* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
* Copyright (C) 1999 by the University of Southern California
* $Id: classifier-mcast.h,v 1.7 2005/08/25 18:58:01 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.
*
*/
#ifndef ns_classifier_mcast_h
#define ns_classifier_mcast_h
#include <stdlib.h>
#include "config.h"
#include "packet.h"
#include "ip.h"
#include "classifier.h"
class MCastClassifier : public Classifier {
public:
MCastClassifier();
~MCastClassifier();
static const char STARSYM[]; //"source" field for shared trees
protected:
virtual int command(int argc, const char*const* argv);
virtual int classify(Packet *p);
int findslot();
enum {HASHSIZE = 256};
struct hashnode {
int slot;
nsaddr_t src;
nsaddr_t dst;
hashnode* next;
int iif; // for RPF checking
};
int hash(nsaddr_t src, nsaddr_t dst) const {
u_int32_t s = src ^ dst;
s ^= s >> 16;
s ^= s >> 8;
return (s & 0xff);
}
hashnode* ht_[HASHSIZE];
hashnode* ht_star_[HASHSIZE]; // for search by group only (not <s,g>)
void set_hash(hashnode* ht[], nsaddr_t src, nsaddr_t dst,
int slot, int iface);
void clearAll();
void clearHash(hashnode* h[], int size);
hashnode* lookup(nsaddr_t src, nsaddr_t dst,
int iface = iface_literal::ANY_IFACE) const;
hashnode* lookup_star(nsaddr_t dst,
int iface = iface_literal::ANY_IFACE) const;
void change_iface(nsaddr_t src, nsaddr_t dst,
int oldiface, int newiface);
void change_iface(nsaddr_t dst,
int oldiface, int newiface);
};
#endif
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