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/* -*- Mode:C++; c-basic-offset:2; tab-width:2; indent-tabs-mode:f -*- */
/*
* classifier-nix.cc
* Copyright (C) 2000 by the University of Southern California
* $Id: classifier-nix.cc,v 1.7 2006/02/21 15:20:19 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.
*
*/
/*
* NixVector classifier for stateless routing
* contributed to ns from
* George F. Riley, Georgia Tech, Spring 2000
*
*/
#include "config.h"
#ifdef HAVE_STL
#include <stdio.h>
#include "ip.h"
#include "nixvec.h"
#include "classifier-nix.h"
#include "hdr_nv.h"
/* Define the TCL Class */
static class NixClassifierClass : public TclClass {
public:
NixClassifierClass() : TclClass("Classifier/Nix") {}
TclObject* create(int, const char*const*) {
return (new NixClassifier());
}
} class_nix_classifier;
/****************** NixClassifier Methods ************/
NsObject* NixClassifier::find(Packet* p)
{
if (m_NodeId == NODE_NONE)
{
printf("NixClassifier::find(), Unknown node id\n");
return(NULL);
}
NixNode* pN = NixNode::GetNodeObject(m_NodeId);
hdr_ip* ip = hdr_ip::access(p);
if ((nodeid_t)ip->daddr() == pN->Id())
{ // Arrived at destination, pass on to the dmux object
// if(0)printf("Returning Dmux objet %p\n", m_Dmux);
return m_Dmux;
}
hdr_nv* nv = hdr_nv::access(p);
NixVec* pNv = nv->nv();
if (pNv == NULL)
{
printf("Error! NixClassifier %s called with no NixVector\n", name());
return(NULL);
}
if (pN == NULL)
{
printf("NixClassifier::find(), can't find node id %ld\n", m_NodeId);
return(NULL);
}
Nix_t Nix = pNv->Extract(pN->GetNixl(), nv->used()); // Get the next nix
nodeid_t n = pN->GetNeighbor(Nix,pNv); // this is just for debug print
NsObject* nsobj = pN->GetNsNeighbor(Nix);
if(0)printf("Classifier %s, Node %ld next hop %ld (%s)\n",
name(), pN->Id(), n, nsobj->name());
return(nsobj); // And return the nexthop head object
}
int NixClassifier::command(int argc, const char*const* argv)
{
if (argc == 3 && strcmp(argv[1],"set-node-id") == 0)
{
m_NodeId = atoi(argv[2]);
return(TCL_OK);
}
if (argc == 4 && strcmp(argv[1],"install") == 0)
{
int target = atoi(argv[2]);
NixNode* pN = NixNode::GetNodeObject(m_NodeId);
if (pN)
{
if(0)printf("%s NixClassifier::Command node %ld install %s %s\n",
name(), pN->Id(), argv[2], argv[3]);
if ((nodeid_t)target == pN->Id())
{ // This is the only case we care about, need to note the dmux obj
m_Dmux = (NsObject*)TclObject::lookup(argv[3]);
//if(0)printf("m_Dmux obj is %p\n", m_Dmux);
}
}
return(TCL_OK);
}
return (Classifier::command(argc, argv));
}
#endif // HAVE_STL
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