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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-port.cc,v 1.9 2006/02/21 15:20:17 mahrenho 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/classifier-port.cc,v 1.9 2006/02/21 15:20:17 mahrenho Exp $ (USC/ISI)
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /cvsroot/nsnam/ns-2/classifier/classifier-port.cc,v 1.9 2006/02/21 15:20:17 mahrenho Exp $";
#endif
#include "classifier-port.h"
int PortClassifier::classify(Packet *p)
{
// Port classifier returns the destination port. No shifting
// or masking is required since in the 32-bit addressing,
// ports are stored in a seperate variable.
hdr_ip* iph = hdr_ip::access(p);
return iph->dport();
}
static class PortClassifierClass : public TclClass {
public:
PortClassifierClass() : TclClass("Classifier/Port") {}
TclObject* create(int, const char*const*) {
return (new PortClassifier());
}
} class_address_classifier;
static class ReservePortClassifierClass : public TclClass {
public:
ReservePortClassifierClass() : TclClass("Classifier/Port/Reserve") {}
TclObject* create(int, const char*const*) {
return (new ReservePortClassifier());
}
} class_reserve_port_classifier;
int ReservePortClassifier::command(int argc, const char*const* argv)
{
if (argc == 3 && strcmp(argv[1],"reserve-port") == 0) {
reserved_ = atoi(argv[2]);
alloc((maxslot_ = reserved_ - 1));
return(TCL_OK);
}
return (Classifier::command(argc, argv));
}
void ReservePortClassifier::clear(int slot)
{
slot_[slot] = 0;
if (slot == maxslot_) {
while (--maxslot_ >= reserved_ && slot_[maxslot_] == 0)
;
}
}
int ReservePortClassifier::getnxt(NsObject *nullagent)
{
int i;
for (i=reserved_; i < nslot_; i++)
if (slot_[i]==0 || slot_[i]==nullagent)
return i;
i=nslot_;
alloc(nslot_);
return i;
}
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