blob: 805582aa7ceb4744be2bb3aa2ffbde2b15ba8765 [file] [log] [blame]
/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2011 University of California, Los Angeles
*
* 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
*
* Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
*/
#include "ccnb-parser-block.h"
#include "ccnb-parser-blob.h"
#include "ccnb-parser-udata.h"
#include "ccnb-parser-tag.h"
#include "ccnb-parser-dtag.h"
#include "ccnb-parser-attr.h"
#include "ccnb-parser-dattr.h"
#include "ccnb-parser-ext.h"
#include "ns3/log.h"
NS_LOG_COMPONENT_DEFINE ("CcnbParserBlock");
namespace ns3 {
namespace CcnbParser {
/// @cond include_hidden
const uint8_t CCN_TT_BITS = 3;
const uint8_t CCN_TT_MASK = ((1 << CCN_TT_BITS) - 1);
const uint8_t CCN_MAX_TINY= ((1 << (7-CCN_TT_BITS)) - 1);
const uint8_t CCN_TT_HBIT = ((uint8_t)(1 << 7));
/// @endcond
// int Block::counter = 0;
Ptr<Block> Block::ParseBlock (Buffer::Iterator &start)
{
// std::cout << "<< pos: " << counter << "\n";
uint32_t value = 0;
// We will have problems if length field is more than 32 bits. Though it's really impossible
uint8_t byte = 0;
while (!start.IsEnd() && !(byte & CCN_TT_HBIT))
{
value <<= 8;
value += byte;
byte = start.ReadU8 ();
// Block::counter ++;
}
if (start.IsEnd())
CcnbDecodingException ();
value <<= 4;
value += ( (byte&(~CCN_TT_HBIT)) >> 3);
/**
* Huh. After fighting with NS-3, it became apparent that Create<T>(...) construct
* doesn't work with references. Just simply doesn't work. wtf?
*/
switch (byte & CCN_TT_MASK)
{
case CCN_BLOB:
return Ptr<Blob> (new Blob(start, value), false);
case CCN_UDATA:
return Ptr<Udata> (new Udata(start, value), false);
case CCN_TAG:
return Ptr<Tag> (new Tag(start, value), false);
case CCN_ATTR:
return Ptr<Attr> (new Attr(start, value), false);
case CCN_DTAG:
return Ptr<Dtag> (new Dtag(start, value), false);
case CCN_DATTR:
return Ptr<Dattr> (new Dattr(start, value), false);
case CCN_EXT:
return Ptr<Ext> (new Ext(start, value), false);
default:
throw CcnbDecodingException ();
}
}
Block::~Block ()
{
}
}
}