destclassifier.cc

This documentation is based on the following versions:- pre-release of the wimax model developed by

/* This software was developed at the National Institute of Standards and
 * Technology by employees of the Federal Government in the course of
 * their official duties. Pursuant to title 17 Section 105 of the United
 * States Code this software is not subject to copyright protection and
 * is in the public domain.
 * NIST assumes no responsibility whatsoever for its use by other parties,
 * and makes no guarantees, expressed or implied, about its quality,
 * reliability, or any other characteristic.
 * <BR>
 * We would appreciate acknowledgement if the software is used.
 * <BR>
 * NIST ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION AND
 * DISCLAIM ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING
 * FROM THE USE OF THIS SOFTWARE.
 * </PRE></P>
 * @author  rouil
 */

#include "destclassifier.h"
#include "mac802_16.h"
#include "scheduling/wimaxscheduler.h"
  
/**
 * TCL Hooks for the simulator for classifier
 */
static class DestClassifierClass : public TclClass {
public:
  DestClassifierClass() : TclClass("SDUClassifier/Dest") {}
  TclObject* create(int, const char*const*) {
    return (new DestClassifier());
    
  }
} class_destclassifier;

/**
 * Create a classifier in the given mac
 * Constructor to be used by TCL
 */
DestClassifier::DestClassifier (): SDUClassifier () {
  
}


/**
 * Classify a packet and return the CID to use (or -1 if unknown)
 * @param p The packet to classify
 * @return The CID or -1
 */
int DestClassifier::classify (Packet * p) 
{
  struct hdr_mac *dh = HDR_MAC(p);
  int dst = dh->macDA();
  mac_->debug ("At %f in Mac %d DestClassifier classifying packet for %d(size=%d, type=%s)\n",\
	       NOW, mac_->addr(), dst, HDR_CMN(p)->size(), packet_info.name(HDR_CMN(p)->ptype()));
  //here we look at the list of peer nodes until we find the one with 
  //the same destination address. Then we return its data communication

  //if broadcast, then send to broadcast CID
  if (dst == -1) {
    if (mac_->getScheduler()->getNodeType ()==STA_BS)
      return BROADCAST_CID;
    else {
      //I am a MN, check if I am connected
      PeerNode *n = mac_->getPeerNode_head ();
      //i should classify depending on the packet type.TBD
      if (n && n->getSecondary())
	return n->getSecondary()->get_cid();
    }
  }
  
  for (PeerNode *n = mac_->getPeerNode_head (); n ; n=n->next_entry()) {
    //printf ("Checking peer %d for %d\n", n->getPeerNode(), dst);
    if (dst == n->getPeerNode ()) {
      switch (HDR_CMN(p)->ptype()) {
      case PT_ARP:
#ifdef USE_802_21
      case PT_RRED:
      case PT_RADS:
      case PT_RSOL:
#endif
	if (n->getSecondary())
	  return n->getSecondary()->get_cid();
	break;
      default:
	if (n->getOutData())
	  return n->getOutData()->get_cid();
	else //this node is not ready to send data
	  break;
      }
    }
  }
  return -1;
}