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lora-mac-header.cc
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lora-mac-header.cc
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/*
* Copyright (c) 2017 University of Padova
*
* 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: Davide Magrin <[email protected]>
*/
/*
* Copyright (c) 2017 University of Padova
*
* 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: Davide Magrin <[email protected]>
*/
#include "lorawan-mac-header.h"
#include "ns3/log.h"
#include <bitset>
namespace ns3
{
namespace lorawan
{
NS_LOG_COMPONENT_DEFINE("LorawanMacHeader");
LorawanMacHeader::LorawanMacHeader()
: m_major(0)
{
}
LorawanMacHeader::~LorawanMacHeader()
{
}
TypeId
LorawanMacHeader::GetTypeId()
{
static TypeId tid =
TypeId("LorawanMacHeader").SetParent<Header>().AddConstructor<LorawanMacHeader>();
return tid;
}
TypeId
LorawanMacHeader::GetInstanceTypeId() const
{
return GetTypeId();
}
uint32_t
LorawanMacHeader::GetSerializedSize() const
{
NS_LOG_FUNCTION_NOARGS();
return 1; // This header only consists in 8 bits
}
void
LorawanMacHeader::Serialize(Buffer::Iterator start) const
{
NS_LOG_FUNCTION_NOARGS();
// The header we need to fill
uint8_t header = 0;
// The MType
header |= m_mtype << 5;
// Do nothing for the bits that are RFU
// The major version bits
header |= m_major;
// Write the byte
start.WriteU8(header);
NS_LOG_DEBUG("Serialization of MAC header: " << std::bitset<8>(header));
}
uint32_t
LorawanMacHeader::Deserialize(Buffer::Iterator start)
{
NS_LOG_FUNCTION_NOARGS();
// Save the byte on a temporary variable
uint8_t byte;
byte = start.ReadU8();
// Get the 2 least significant bits to have the Major
m_major = byte & 0b11;
// Move the three most significant bits to the least significant positions
// to get the MType
m_mtype = byte >> 5;
return 1; // the number of bytes consumed.
}
void
LorawanMacHeader::Print(std::ostream& os) const
{
os << "MessageType=" << unsigned(m_mtype) << std::endl;
os << "Major=" << unsigned(m_major) << std::endl;
}
void
LorawanMacHeader::SetMType(enum MType mtype)
{
NS_LOG_FUNCTION(this << mtype);
m_mtype = mtype;
}
uint8_t
LorawanMacHeader::GetMType() const
{
NS_LOG_FUNCTION_NOARGS();
return m_mtype;
}
void
LorawanMacHeader::SetMajor(uint8_t major)
{
NS_LOG_FUNCTION_NOARGS();
NS_ASSERT(0 <= major && major < 4);
m_major = major;
}
uint8_t
LorawanMacHeader::GetMajor() const
{
NS_LOG_FUNCTION_NOARGS();
return m_major;
}
bool
LorawanMacHeader::IsUplink() const
{
NS_LOG_FUNCTION_NOARGS();
return (m_mtype == JOIN_REQUEST) || (m_mtype == UNCONFIRMED_DATA_UP) ||
(m_mtype == CONFIRMED_DATA_UP);
}
bool
LorawanMacHeader::IsConfirmed() const
{
NS_LOG_FUNCTION_NOARGS();
return (m_mtype == CONFIRMED_DATA_DOWN) || (m_mtype == CONFIRMED_DATA_UP);
}
void LorawanMacHeader::SetBeacon(bool isBeacon) {
m_isBeacon = isBeacon;
}
bool LorawanMacHeader::IsBeacon() const {
return m_isBeacon;
}
} // namespace lorawan
} // namespace ns3