printxor.cc

COPE the first practical network coding scheme which is developped on click

/*
 * printxor.{cc,hh} -- print encoded packet headers, for debugging.
 * Wenjun Hu
 * adapted from printsr.{cc, hh} by John Bicket
 *
 * Copyright (c) 2005 University of Cambridge
 * Copyright (c) 2005 Massachusetts Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, subject to the conditions
 * listed in the Click LICENSE file. These conditions include: you must
 * preserve this copyright notice, and you cannot mention the copyright
 * holders in advertising related to the Software without their permission.
 * The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This
 * notice is a summary of the Click LICENSE file; the license in that file is
 * legally binding.
 */

#include <click/config.h>
#include <click/ipaddress.hh>
//#include <click/etheraddress.hh>
#include <click/error.hh>
#include <click/glue.hh>
#include <click/straccum.hh>
#include <clicknet/ether.h>
#include "printxor.hh"

CLICK_DECLS

PrintXor::PrintXor()
  : Element(1, 1)
{
}

PrintXor::~PrintXor()
{
}

String 
PrintXor::to_string(struct click_xor_header *pk) 
{
  StringAccum sa;

  sa << "Encoded header: [ETHTYPE, IPID, IPSRC, ALIAS, PKTLEN]";
  sa << " (" << ntohs(pk->_ether_type[0]) << ", " << ntohs(pk->_ipid[0]) << ", " << IPAddress(pk->_src[0]) << ", " << (uint16_t) pk->_alias[0] << ", " << ntohs(pk->_len[0]) << ")";
  sa << " (" << ntohs(pk->_ether_type[1]) << ", " << ntohs(pk->_ipid[1]) << ", " << IPAddress(pk->_src[1]) << ", " << (uint16_t) pk->_alias[1] << ", " << ntohs(pk->_len[1]) << ")";

  return sa.take_string();
}

Packet *
PrintXor::simple_action(Packet *p)
{
  click_ether *eh = (click_ether *) p->data();
  struct click_xor_header *xorh = (struct click_xor_header *) (eh+1);


  StringAccum sa;
  sa << PrintXor::to_string(xorh);
  
  click_chatter("PrintXor: %s", sa.take_string().cc());

  return p;
}

CLICK_ENDDECLS
EXPORT_ELEMENT(PrintXor)