network-server.cc

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/*
 * Copyright (c) 2018 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
 *
 * Authors: Davide Magrin <magrinda@dei.unipd.it>
 *          Martina Capuzzo <capuzzom@dei.unipd.it>
 */
 
#include "network-server.h"
 
#include "class-a-end-device-lorawan-mac.h"
#include "lora-device-address.h"
#include "lora-frame-header.h"
#include "lorawan-mac-header.h"
#include "mac-command.h"
#include "network-status.h"
 
#include "ns3/net-device.h"
#include "ns3/node-container.h"
#include "ns3/packet.h"
#include "ns3/point-to-point-net-device.h"
 
namespace ns3
{
namespace lorawan
{
 
NS_LOG_COMPONENT_DEFINE("NetworkServer");
 
NS_OBJECT_ENSURE_REGISTERED(NetworkServer);
 
TypeId
NetworkServer::GetTypeId()
{
    static TypeId tid =
        TypeId("ns3::NetworkServer")
            .SetParent<Application>()
            .AddConstructor<NetworkServer>()
            .AddTraceSource(
                "ReceivedPacket",
                "Trace source that is fired when a packet arrives at the network server",
                MakeTraceSourceAccessor(&NetworkServer::m_receivedPacket),
                "ns3::Packet::TracedCallback")
            .SetGroupName("lorawan");
    return tid;
}
 
NetworkServer::NetworkServer()
    : m_status(Create<NetworkStatus>()),
      m_controller(Create<NetworkController>(m_status)),
      m_scheduler(Create<NetworkScheduler>(m_status, m_controller))
{
    NS_LOG_FUNCTION_NOARGS();
}
 
NetworkServer::~NetworkServer()
{
    NS_LOG_FUNCTION_NOARGS();
}
 
void
NetworkServer::StartApplication()
{
    NS_LOG_FUNCTION_NOARGS();
}
 
void
NetworkServer::StopApplication()
{
    NS_LOG_FUNCTION_NOARGS();
}
 
void
NetworkServer::AddGateway(Ptr<Node> gateway, Ptr<NetDevice> netDevice)
{
    NS_LOG_FUNCTION(this << gateway);
 
    // Get the PointToPointNetDevice
    Ptr<PointToPointNetDevice> p2pNetDevice;
    for (uint32_t i = 0; i < gateway->GetNDevices(); i++)
    {
        p2pNetDevice = gateway->GetDevice(i)->GetObject<PointToPointNetDevice>();
        if (p2pNetDevice)
        {
            // We found a p2pNetDevice on the gateway
            break;
        }
    }
 
    // Get the gateway's LoRa MAC layer (assumes gateway's MAC is configured as first device)
    Ptr<GatewayLorawanMac> gwMac =
        gateway->GetDevice(0)->GetObject<LoraNetDevice>()->GetMac()->GetObject<GatewayLorawanMac>();
    NS_ASSERT(gwMac);
 
    // Get the Address
    Address gatewayAddress = p2pNetDevice->GetAddress();
 
    // Create new gatewayStatus
    Ptr<GatewayStatus> gwStatus = Create<GatewayStatus>(gatewayAddress, netDevice, gwMac);
 
    m_status->AddGateway(gatewayAddress, gwStatus);
}
 
void
NetworkServer::AddNodes(NodeContainer nodes)
{
    NS_LOG_FUNCTION_NOARGS();
 
    // For each node in the container, call the function to add that single node
    NodeContainer::Iterator it;
    for (it = nodes.Begin(); it != nodes.End(); it++)
    {
        AddNode(*it);
    }
}
 
void
NetworkServer::AddNode(Ptr<Node> node)
{
    NS_LOG_FUNCTION(this << node);
 
    // Get the LoraNetDevice
    Ptr<LoraNetDevice> loraNetDevice;
    for (uint32_t i = 0; i < node->GetNDevices(); i++)
    {
        loraNetDevice = node->GetDevice(i)->GetObject<LoraNetDevice>();
        if (loraNetDevice)
        {
            // We found a LoraNetDevice on the node
            break;
        }
    }
 
    // Get the MAC
    Ptr<ClassAEndDeviceLorawanMac> edLorawanMac =
        loraNetDevice->GetMac()->GetObject<ClassAEndDeviceLorawanMac>();
 
    // Update the NetworkStatus about the existence of this node
    m_status->AddNode(edLorawanMac);
}
 
bool
NetworkServer::Receive(Ptr<NetDevice> device,
                       Ptr<const Packet> packet,
                       uint16_t protocol,
                       const Address& address)
{
    NS_LOG_FUNCTION(this << packet << protocol << address);
 
    // Create a copy of the packet
    Ptr<Packet> myPacket = packet->Copy();
 
    // Fire the trace source
    m_receivedPacket(packet);
 
    // Inform the scheduler of the newly arrived packet
    m_scheduler->OnReceivedPacket(packet);
 
    // Inform the status of the newly arrived packet
    m_status->OnReceivedPacket(packet, address);
 
    // Inform the controller of the newly arrived packet
    m_controller->OnNewPacket(packet);
 
    return true;
}
 
void
NetworkServer::AddComponent(Ptr<NetworkControllerComponent> component)
{
    NS_LOG_FUNCTION(this << component);
 
    m_controller->Install(component);
}
 
Ptr<NetworkStatus>
NetworkServer::GetNetworkStatus()
{
    return m_status;
}
 
} // namespace lorawan
} // namespace ns3