/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2008,2009 IITP RAS
 *
 * 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: Kirill Andreev <andreev@iitp.ru>
 */

#include "ie-dot11s-rann.h"
#include "ns3/assert.h"
#include "ns3/address-utils.h"
#include "ns3/packet.h"

namespace ns3 {
namespace dot11s {

IeRann::~IeRann ()
{
}
IeRann::IeRann () :
  m_flags (0), m_hopcount (0), m_ttl (0), m_originatorAddress (Mac48Address::GetBroadcast ()),
  m_destSeqNumber (0), m_metric (0)
{
}
WifiInformationElementId
IeRann::ElementId () const
{
  return IE11S_RANN;
}

void
IeRann::SetFlags (uint8_t flags)
{
  m_flags = flags;
}
void
IeRann::SetHopcount (uint8_t hopcount)
{
  m_hopcount = hopcount;
}
void
IeRann::SetTTL (uint8_t ttl)
{
  m_ttl = ttl;
}
void
IeRann::SetDestSeqNumber (uint32_t dest_seq_number)
{
  m_destSeqNumber = dest_seq_number;
}
void
IeRann::SetMetric (uint32_t metric)
{
  m_metric = metric;
}
void
IeRann::SetOriginatorAddress (Mac48Address originator_address)
{
  m_originatorAddress = originator_address;
}

uint8_t
IeRann::GetFlags ()
{
  return m_flags;
}
uint8_t
IeRann::GetHopcount ()
{
  return m_hopcount;
}
uint8_t
IeRann::GetTtl ()
{
  return m_ttl;
}
uint32_t
IeRann::GetDestSeqNumber ()
{
  return m_destSeqNumber;
}
uint32_t
IeRann::GetMetric ()
{
  return m_metric;
}
void
IeRann::DecrementTtl ()
{
  m_ttl--;
  m_hopcount++;
}

void
IeRann::IncrementMetric (uint32_t m)
{
  m_metric += m;
}

Mac48Address
IeRann::GetOriginatorAddress ()
{
  return m_originatorAddress;
}
void
IeRann::SerializeInformationField (Buffer::Iterator i) const
{
  i.WriteU8 (m_flags);
  i.WriteU8 (m_hopcount);
  i.WriteU8 (m_ttl);
  WriteTo (i, m_originatorAddress);
  i.WriteHtolsbU32 (m_destSeqNumber);
  i.WriteHtolsbU32 (m_metric);
}
uint8_t
IeRann::DeserializeInformationField (Buffer::Iterator start, uint8_t length)
{
  Buffer::Iterator i = start;
  m_flags = i.ReadU8 ();
  m_hopcount = i.ReadU8 ();
  m_ttl = i.ReadU8 ();
  ReadFrom (i, m_originatorAddress);
  m_destSeqNumber = i.ReadLsbtohU32 ();
  m_metric = i.ReadLsbtohU32 ();
  return i.GetDistanceFrom (start);
}
uint8_t
IeRann::GetInformationFieldSize () const
{
  uint8_t retval = 1 //Flags
    + 1   //Hopcount
    + 1   //TTL
    + 6   //OriginatorAddress
    + 4   //DestSeqNumber
    + 4;  //Metric
  return retval;
}

void
IeRann::Print (std::ostream &os) const
{
  os << std::endl << "<information_element id=" << ElementId () << ">" << std::endl;
  os << "  flags              = " << (int) m_flags << std::endl;
  os << "  hop count          = " << (int) m_hopcount << std::endl;
  os << "  TTL                = " << (int) m_ttl << std::endl;
  os << "  originator address = " << m_originatorAddress << std::endl;
  os << "  dst seq. number    = " << m_destSeqNumber << std::endl;
  os << "  metric             = " << m_metric << std::endl;
  os << "</information_element>" << std::endl;
}

bool
operator== (const IeRann & a, const IeRann & b)
{
  return (a.m_flags == b.m_flags && a.m_hopcount == b.m_hopcount && a.m_ttl == b.m_ttl
          && a.m_originatorAddress == b.m_originatorAddress && a.m_destSeqNumber == b.m_destSeqNumber
          && a.m_metric == b.m_metric);
}
std::ostream &
operator << (std::ostream &os, const IeRann &a)
{
  a.Print (os);
  return os;
}
}
} // namespace ns3::dot11s


