/*
 * SPDX-License-Identifier: GPL-2.0-only
 *
 * Authors: Lalith Suresh <suresh.lalith@gmail.com>
 */

// Scenario: node A (using Click) sends packets to node B (not using
// Click)
//
//  (Click)             (non-Click)
//    A )))     WLAN      ((( B
// (172.16.1.1)         (172.16.1.2)
//    (eth0)
//

#include "ns3/applications-module.h"
#include "ns3/click-internet-stack-helper.h"
#include "ns3/core-module.h"
#include "ns3/internet-module.h"
#include "ns3/log.h"
#include "ns3/mobility-helper.h"
#include "ns3/network-module.h"
#include "ns3/wifi-module.h"

using namespace ns3;

void
ReceivePacket(Ptr<Socket> socket)
{
    NS_LOG_UNCOND("Received one packet!");
}

int
main(int argc, char* argv[])
{
    double rss = -80;
    std::string clickConfigFolder = "src/click/examples";

    CommandLine cmd(__FILE__);
    cmd.AddValue("clickConfigFolder",
                 "Base folder for click configuration files",
                 clickConfigFolder);
    cmd.Parse(argc, argv);

    // Setup nodes
    NodeContainer wifiNodes;
    wifiNodes.Create(2);

    // Get Wifi devices installed on both nodes.
    // Adapted from examples/wireless/wifi-simple-adhoc.cc
    std::string phyMode("DsssRate1Mbps");

    // disable fragmentation for frames below 2200 bytes
    Config::SetDefault("ns3::WifiRemoteStationManager::FragmentationThreshold",
                       StringValue("2200"));
    // turn off RTS/CTS for frames below 2200 bytes
    Config::SetDefault("ns3::WifiRemoteStationManager::RtsCtsThreshold", StringValue("2200"));
    // Fix non-unicast data rate to be the same as that of unicast
    Config::SetDefault("ns3::WifiRemoteStationManager::NonUnicastMode", StringValue(phyMode));

    WifiHelper wifi;
    wifi.SetStandard(WIFI_STANDARD_80211b);

    YansWifiPhyHelper wifiPhy;
    // This is one parameter that matters when using FixedRssLossModel
    // set it to zero; otherwise, gain will be added
    wifiPhy.Set("RxGain", DoubleValue(0));
    // ns-3 supports RadioTap and Prism tracing extensions for 802.11b
    wifiPhy.SetPcapDataLinkType(WifiPhyHelper::DLT_IEEE802_11_RADIO);

    YansWifiChannelHelper wifiChannel;
    wifiChannel.SetPropagationDelay("ns3::ConstantSpeedPropagationDelayModel");
    // The below FixedRssLossModel will cause the rss to be fixed regardless
    // of the distance between the two stations, and the transmit power
    wifiChannel.AddPropagationLoss("ns3::FixedRssLossModel", "Rss", DoubleValue(rss));
    wifiPhy.SetChannel(wifiChannel.Create());

    // Add an upper mac and disable rate control
    WifiMacHelper wifiMac;
    wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager",
                                 "DataMode",
                                 StringValue(phyMode),
                                 "ControlMode",
                                 StringValue(phyMode));
    // Set it to adhoc mode
    wifiMac.SetType("ns3::AdhocWifiMac");
    NetDeviceContainer wifiDevices = wifi.Install(wifiPhy, wifiMac, wifiNodes);

    // Setup mobility models
    MobilityHelper mobility;
    Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator>();
    positionAlloc->Add(Vector(0.0, 0.0, 0.0));
    positionAlloc->Add(Vector(5.0, 0.0, 0.0));
    mobility.SetPositionAllocator(positionAlloc);
    mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
    mobility.Install(wifiNodes);

    // Install normal internet stack on node B
    InternetStackHelper internet;
    internet.Install(wifiNodes.Get(1));

    // Install Click on node A
    ClickInternetStackHelper clickinternet;
    clickinternet.SetClickFile(wifiNodes.Get(0),
                               clickConfigFolder + "/nsclick-wifi-single-interface.click");
    clickinternet.SetRoutingTableElement(wifiNodes.Get(0), "rt");
    clickinternet.Install(wifiNodes.Get(0));

    // Configure IP addresses
    Ipv4AddressHelper ipv4;
    ipv4.SetBase("172.16.1.0", "255.255.255.0");
    ipv4.Assign(wifiDevices);

    // Setup traffic application and sockets
    Address LocalAddress(InetSocketAddress(Ipv4Address::GetAny(), 50000));
    PacketSinkHelper packetSinkHelper("ns3::TcpSocketFactory", LocalAddress);
    ApplicationContainer recvapp = packetSinkHelper.Install(wifiNodes.Get(1));
    recvapp.Start(Seconds(5.0));
    recvapp.Stop(Seconds(10.0));

    OnOffHelper onOffHelper("ns3::TcpSocketFactory", Address());
    onOffHelper.SetAttribute("OnTime", StringValue("ns3::ConstantRandomVariable[Constant=1]"));
    onOffHelper.SetAttribute("OffTime", StringValue("ns3::ConstantRandomVariable[Constant=0]"));

    ApplicationContainer appcont;

    AddressValue remoteAddress(InetSocketAddress(Ipv4Address("172.16.1.2"), 50000));
    onOffHelper.SetAttribute("Remote", remoteAddress);
    appcont.Add(onOffHelper.Install(wifiNodes.Get(0)));

    appcont.Start(Seconds(5.0));
    appcont.Stop(Seconds(10.0));

    // For tracing
    wifiPhy.EnablePcap("nsclick-raw-wlan", wifiDevices);

    Simulator::Stop(Seconds(20.0));
    Simulator::Run();

    Simulator::Destroy();

    return 0;
}
