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/* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
* Copyright (c) 1996-1997 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the MASH Research
* Group at the University of California Berkeley.
* 4. Neither the name of the University nor of the Research Group may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /cvsroot/nsnam/ns-2/classifier/classifier-addr.cc,v 1.28 2006/02/21 15:20:17 mahrenho Exp $";
#endif
#include "classifier-addr.h"
int AddressClassifier::classify(Packet *p) {
hdr_ip* iph = hdr_ip::access(p);
return mshift(iph->daddr());
}
static class AddressClassifierClass : public TclClass {
public:
AddressClassifierClass() : TclClass("Classifier/Addr") {}
TclObject* create(int, const char*const*) {
return (new AddressClassifier());
}
} class_address_classifier;
/* added for mobileip code Ya, 2/99*/
static class ReserveAddressClassifierClass : public TclClass {
public:
ReserveAddressClassifierClass() : TclClass("Classifier/Addr/Reserve") {}
TclObject* create(int, const char*const*) {
return (new ReserveAddressClassifier());
}
} class_reserve_address_classifier;
int ReserveAddressClassifier::command(int argc, const char*const* argv)
{
// Tcl& tcl = Tcl::instance();
if (argc == 3 && strcmp(argv[1],"reserve-port") == 0) {
reserved_ = atoi(argv[2]);
alloc((maxslot_ = reserved_ - 1));
return(TCL_OK);
}
return (AddressClassifier::command(argc, argv));
}
void ReserveAddressClassifier::clear(int slot)
{
slot_[slot] = 0;
if (slot == maxslot_) {
while (--maxslot_ >= reserved_ && slot_[maxslot_] == 0)
;
}
}
int ReserveAddressClassifier::classify(Packet *p) {
hdr_ip* iph = hdr_ip::access(p);
return iph->dport();
}
int ReserveAddressClassifier::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;
}
static class BcastAddressClassifierClass : public TclClass {
public:
BcastAddressClassifierClass() : TclClass("Classifier/Hash/Dest/Bcast") {}
TclObject* create(int, const char*const*) {
return (new BcastAddressClassifier());
}
} class_bcast_address_classifier;
NsObject* BcastAddressClassifier::find(Packet* p)
{
NsObject* node = NULL;
int cl = classify(p);
if (cl < 0 || cl >= nslot_ || (node = slot_[cl]) == 0) {
if (cl == BCAST_ADDR_MASK) {
// limited broadcast; assuming no such packet
// would be delivered back to sender
return bcast_recver_;
}
if (default_target_)
return default_target_;
/*
* Sigh. Can't pass the pkt out to tcl because it's
* not an object.
*/
Tcl::instance().evalf("%s no-slot %d", name(), cl);
/*
* Try again. Maybe callback patched up the table.
*/
cl = classify(p);
if (cl < 0 || cl >= nslot_ || (node = slot_[cl]) == 0)
return (NULL);
}
return (node);
}
int BcastAddressClassifier::command(int argc, const char*const* argv)
{
// Tcl& tcl = Tcl::instance();
if (argc == 3 && strcmp(argv[1],"bcast-receiver") == 0) {
bcast_recver_ = (NsObject*)TclObject::lookup(argv[2]);
return(TCL_OK);
}
return (AddressClassifier::command(argc, argv));
}
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