lora-device-address.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 <magrinda@dei.unipd.it>
 */
 
#include "lora-device-address.h"
 
#include "ns3/log.h"
 
#include <bitset>
 
namespace ns3
{
namespace lorawan
{
 
NS_LOG_COMPONENT_DEFINE("LoraDeviceAddress");
 
// NwkID
////////
 
NwkID::NwkID(uint8_t nwkId)
    : m_nwkId(nwkId)
{
}
 
void
NwkID::Set(uint8_t nwkId)
{
    // Check whether the MSB is set
    if (nwkId >> 7)
    {
        NS_LOG_WARN("Attempting to set too big a network ID. Will only consider the 7 least "
                    "significant bits.");
    }
    m_nwkId = nwkId & 0x7F; // 0x7f = ob01111111
}
 
uint8_t
NwkID::Get() const
{
    return m_nwkId;
}
 
// NwkAddr
//////////
 
NwkAddr::NwkAddr(uint32_t nwkAddr)
    : m_nwkAddr(nwkAddr)
{
}
 
void
NwkAddr::Set(uint32_t nwkAddr)
{
    // Check whether the most significant bits are set
    if (nwkAddr >> 25)
    {
        NS_LOG_WARN("Attempting to set too big a network address. Will only consider the 25 least "
                    "significant bits.");
    }
    m_nwkAddr = nwkAddr & 0x1FFFFFF;
}
 
uint32_t
NwkAddr::Get() const
{
    return m_nwkAddr;
}
 
// LoraDeviceAddress
////////////////////
 
LoraDeviceAddress::LoraDeviceAddress()
{
    NS_LOG_FUNCTION_NOARGS();
}
 
LoraDeviceAddress::LoraDeviceAddress(uint32_t address)
{
    NS_LOG_FUNCTION(this << address);
 
    Set(address);
}
 
LoraDeviceAddress::LoraDeviceAddress(uint8_t nwkId, uint32_t nwkAddr)
{
    NS_LOG_FUNCTION(this << unsigned(nwkId) << nwkAddr);
 
    m_nwkId.Set(nwkId);
    m_nwkAddr.Set(nwkAddr);
}
 
LoraDeviceAddress::LoraDeviceAddress(NwkID nwkId, NwkAddr nwkAddr)
{
    NS_LOG_FUNCTION(this << unsigned(nwkId.Get()) << nwkAddr.Get());
 
    m_nwkId = nwkId;
    m_nwkAddr = nwkAddr;
}
 
void
LoraDeviceAddress::Serialize(uint8_t buf[4]) const
{
    NS_LOG_FUNCTION(this << &buf);
 
    uint32_t address = Get();
 
    buf[0] = (address >> 24) & 0xff;
    buf[1] = (address >> 16) & 0xff;
    buf[2] = (address >> 8) & 0xff;
    buf[3] = (address >> 0) & 0xff;
}
 
LoraDeviceAddress
LoraDeviceAddress::Deserialize(const uint8_t buf[4])
{
    NS_LOG_FUNCTION(&buf);
 
    // Craft the address from the buffer
    uint32_t address = 0;
    address |= buf[0];
    address <<= 8;
    address |= buf[1];
    address <<= 8;
    address |= buf[2];
    address <<= 8;
    address |= buf[3];
 
    return LoraDeviceAddress(address);
}
 
Address
LoraDeviceAddress::ConvertTo() const
{
    NS_LOG_FUNCTION(this);
 
    uint8_t addressBuffer[4];
    Serialize(addressBuffer);
    return Address(GetType(), addressBuffer, 4);
}
 
LoraDeviceAddress
LoraDeviceAddress::ConvertFrom(const Address& address)
{
    // Create the new, empty address
    LoraDeviceAddress ad;
    uint8_t addressBuffer[4];
 
    // Check that the address we want to convert is compatible with a
    // LoraDeviceAddress
    NS_ASSERT(address.CheckCompatible(GetType(), 4));
    address.CopyTo(addressBuffer);
    ad = Deserialize(addressBuffer);
    return ad;
}
 
uint8_t
LoraDeviceAddress::GetType()
{
    NS_LOG_FUNCTION_NOARGS();
 
    static uint8_t type = Address::Register();
    return type;
}
 
uint32_t
LoraDeviceAddress::Get() const
{
    NS_LOG_FUNCTION_NOARGS();
 
    uint32_t address = 0;
    uint32_t nwkId = m_nwkId.Get() << 25;
    address |= (m_nwkAddr.Get() | nwkId);
    NS_LOG_DEBUG("m_nwkId + m_nwkAddr = " << std::bitset<32>(address));
 
    return address;
}
 
void
LoraDeviceAddress::Set(uint32_t address)
{
    NS_LOG_FUNCTION_NOARGS();
 
    m_nwkId.Set(address >> 25);         // Only leave the 7 most significant bits
    m_nwkAddr.Set(address & 0x1FFFFFF); // Only consider the 25 least significant bits
}
 
uint8_t
LoraDeviceAddress::GetNwkID()
{
    NS_LOG_FUNCTION_NOARGS();
 
    return m_nwkId.Get();
}
 
uint32_t
LoraDeviceAddress::GetNwkAddr()
{
    NS_LOG_FUNCTION_NOARGS();
 
    return m_nwkAddr.Get();
}
 
void
LoraDeviceAddress::SetNwkID(uint8_t nwkId)
{
    NS_LOG_FUNCTION(this << unsigned(nwkId));
 
    m_nwkId.Set(nwkId);
}
 
void
LoraDeviceAddress::SetNwkAddr(uint32_t nwkAddr)
{
    NS_LOG_FUNCTION(this << nwkAddr);
 
    m_nwkAddr.Set(nwkAddr);
}
 
std::string
LoraDeviceAddress::Print() const
{
    NS_LOG_FUNCTION_NOARGS();
 
    std::string result;
    result += std::bitset<7>(m_nwkId.Get()).to_string();
    result += "|";
    result += std::bitset<25>(m_nwkAddr.Get()).to_string();
    return result;
}
 
bool
LoraDeviceAddress::operator==(const LoraDeviceAddress& other) const
{
    return this->Get() == other.Get();
}
 
bool
LoraDeviceAddress::operator!=(const LoraDeviceAddress& other) const
{
    return this->Get() != other.Get();
}
 
bool
LoraDeviceAddress::operator<(const LoraDeviceAddress& other) const
{
    return this->Get() < other.Get();
}
 
bool
LoraDeviceAddress::operator>(const LoraDeviceAddress& other) const
{
    return !(this->Get() < other.Get());
}
 
std::ostream&
operator<<(std::ostream& os, const LoraDeviceAddress& address)
{
    os << address.Print();
    return os;
}
} // namespace lorawan
} // namespace ns3