279 lines
9.6 KiB
C++
279 lines
9.6 KiB
C++
/*
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* Copyright (c) 2009 University of Washington
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*
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* SPDX-License-Identifier: GPL-2.0-only
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*
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*/
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//
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// This program configures a grid (default 5x5) of nodes on an
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// 802.11b physical layer, with
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// 802.11b NICs in adhoc mode, and by default, sends one packet of 1000
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// (application) bytes to node 1.
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//
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// The default layout is like this, on a 2-D grid.
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//
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// n20 n21 n22 n23 n24
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// n15 n16 n17 n18 n19
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// n10 n11 n12 n13 n14
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// n5 n6 n7 n8 n9
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// n0 n1 n2 n3 n4
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//
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// the layout is affected by the parameters given to GridPositionAllocator;
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// by default, GridWidth is 5 (nodes per row) and numNodes is 25..
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//
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// There are a number of command-line options available to control
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// the default behavior. The list of available command-line options
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// can be listed with the following command:
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// ./ns3 run "wifi-simple-adhoc-grid --help"
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//
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// Note that all ns-3 attributes (not just the ones exposed in the below
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// script) can be changed at command line; see the ns-3 documentation.
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//
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// For instance, for this configuration, the physical layer will
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// stop successfully receiving packets when distance increases beyond
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// the default of 100m. The cutoff is around 116m; below that value, the
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// received signal strength falls below the (default) RSSI limit of -82 dBm
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// used by Wi-Fi's threshold preamble detection running.
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//
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// To see this effect, try running at a larger distance, and no packet
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// reception will be reported:
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//
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// ./ns3 run "wifi-simple-adhoc-grid --distance=200"
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//
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// The default path through the topology will follow the following node
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// numbers: 24->23->18->13->12->11->10->5->0
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//
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// To see this, the following Bash commands will list the UDP packet
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// transmissions hop-by-hop, if tracing is enabled:
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//
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// ./ns3 run "wifi-simple-adhoc-grid --tracing=1"
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// grep ^t wifi-simple-adhoc-grid.tr | grep Udp | grep -v olsr | less
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//
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// By changing the distance to a smaller value, more nodes can be reached
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// by each transmission, and the number of forwarding hops will decrease.
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//
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// The source node and sink node can be changed like this:
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//
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// ./ns3 run "wifi-simple-adhoc-grid --sourceNode=20 --sinkNode=10"
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//
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// This script can also be helpful to put the Wifi layer into verbose
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// logging mode; this command will turn on all wifi logging:
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//
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// ./ns3 run "wifi-simple-adhoc-grid --verbose=1"
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//
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// By default, trace file writing is off-- to enable it, try:
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// ./ns3 run "wifi-simple-adhoc-grid --tracing=1"
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//
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// When you are done tracing, you will notice many pcap trace files
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// in your directory. If you have tcpdump installed, you can try this:
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//
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// tcpdump -r wifi-simple-adhoc-grid-0-0.pcap -nn -tt
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//
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// or you can examine the text-based trace wifi-simple-adhoc-grid.tr with
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// an editor.
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//
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#include "ns3/command-line.h"
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#include "ns3/config.h"
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#include "ns3/double.h"
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#include "ns3/internet-stack-helper.h"
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#include "ns3/ipv4-address-helper.h"
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#include "ns3/ipv4-list-routing-helper.h"
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#include "ns3/ipv4-static-routing-helper.h"
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#include "ns3/log.h"
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#include "ns3/mobility-helper.h"
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#include "ns3/mobility-model.h"
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#include "ns3/olsr-helper.h"
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#include "ns3/string.h"
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#include "ns3/uinteger.h"
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#include "ns3/yans-wifi-channel.h"
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#include "ns3/yans-wifi-helper.h"
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE("WifiSimpleAdhocGrid");
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/**
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* Function called when a packet is received.
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*
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* \param socket The receiving socket.
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*/
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void
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ReceivePacket(Ptr<Socket> socket)
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{
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while (socket->Recv())
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{
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NS_LOG_UNCOND("Received one packet!");
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}
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}
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/**
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* Generate traffic.
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*
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* \param socket The sending socket.
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* \param pktSize The packet size.
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* \param pktCount The packet count.
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* \param pktInterval The interval between two packets.
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*/
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static void
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GenerateTraffic(Ptr<Socket> socket, uint32_t pktSize, uint32_t pktCount, Time pktInterval)
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{
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if (pktCount > 0)
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{
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socket->Send(Create<Packet>(pktSize));
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Simulator::Schedule(pktInterval,
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&GenerateTraffic,
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socket,
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pktSize,
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pktCount - 1,
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pktInterval);
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}
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else
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{
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socket->Close();
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}
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}
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int
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main(int argc, char* argv[])
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{
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std::string phyMode{"DsssRate1Mbps"};
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meter_u distance{100};
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uint32_t packetSize{1000}; // bytes
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uint32_t numPackets{1};
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uint32_t numNodes{25}; // by default, 5x5
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uint32_t sinkNode{0};
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uint32_t sourceNode{24};
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Time interPacketInterval{"1s"};
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bool verbose{false};
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bool tracing{false};
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CommandLine cmd(__FILE__);
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cmd.AddValue("phyMode", "Wifi Phy mode", phyMode);
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cmd.AddValue("distance", "distance (m)", distance);
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cmd.AddValue("packetSize", "size of application packet sent", packetSize);
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cmd.AddValue("numPackets", "number of packets generated", numPackets);
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cmd.AddValue("interval", "interval (seconds) between packets", interPacketInterval);
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cmd.AddValue("verbose", "turn on all WifiNetDevice log components", verbose);
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cmd.AddValue("tracing", "turn on ascii and pcap tracing", tracing);
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cmd.AddValue("numNodes", "number of nodes", numNodes);
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cmd.AddValue("sinkNode", "Receiver node number", sinkNode);
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cmd.AddValue("sourceNode", "Sender node number", sourceNode);
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cmd.Parse(argc, argv);
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// Fix non-unicast data rate to be the same as that of unicast
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Config::SetDefault("ns3::WifiRemoteStationManager::NonUnicastMode", StringValue(phyMode));
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NodeContainer c;
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c.Create(numNodes);
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// The below set of helpers will help us to put together the wifi NICs we want
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WifiHelper wifi;
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if (verbose)
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{
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WifiHelper::EnableLogComponents(); // Turn on all Wifi logging
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}
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YansWifiPhyHelper wifiPhy;
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// set it to zero; otherwise, gain will be added
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wifiPhy.Set("RxGain", DoubleValue(-10));
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// ns-3 supports RadioTap and Prism tracing extensions for 802.11b
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wifiPhy.SetPcapDataLinkType(WifiPhyHelper::DLT_IEEE802_11_RADIO);
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YansWifiChannelHelper wifiChannel;
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wifiChannel.SetPropagationDelay("ns3::ConstantSpeedPropagationDelayModel");
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wifiChannel.AddPropagationLoss("ns3::FriisPropagationLossModel");
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wifiPhy.SetChannel(wifiChannel.Create());
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// Add an upper mac and disable rate control
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WifiMacHelper wifiMac;
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wifi.SetStandard(WIFI_STANDARD_80211b);
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wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager",
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"DataMode",
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StringValue(phyMode),
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"ControlMode",
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StringValue(phyMode));
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// Set it to adhoc mode
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wifiMac.SetType("ns3::AdhocWifiMac");
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NetDeviceContainer devices = wifi.Install(wifiPhy, wifiMac, c);
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MobilityHelper mobility;
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mobility.SetPositionAllocator("ns3::GridPositionAllocator",
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"MinX",
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DoubleValue(0.0),
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"MinY",
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DoubleValue(0.0),
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"DeltaX",
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DoubleValue(distance),
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"DeltaY",
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DoubleValue(distance),
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"GridWidth",
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UintegerValue(5),
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"LayoutType",
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StringValue("RowFirst"));
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mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
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mobility.Install(c);
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// Enable OLSR
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OlsrHelper olsr;
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Ipv4StaticRoutingHelper staticRouting;
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Ipv4ListRoutingHelper list;
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list.Add(staticRouting, 0);
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list.Add(olsr, 10);
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InternetStackHelper internet;
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internet.SetRoutingHelper(list); // has effect on the next Install ()
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internet.Install(c);
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Ipv4AddressHelper ipv4;
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NS_LOG_INFO("Assign IP Addresses.");
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ipv4.SetBase("10.1.1.0", "255.255.255.0");
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Ipv4InterfaceContainer i = ipv4.Assign(devices);
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TypeId tid = TypeId::LookupByName("ns3::UdpSocketFactory");
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Ptr<Socket> recvSink = Socket::CreateSocket(c.Get(sinkNode), tid);
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InetSocketAddress local = InetSocketAddress(Ipv4Address::GetAny(), 80);
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recvSink->Bind(local);
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recvSink->SetRecvCallback(MakeCallback(&ReceivePacket));
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Ptr<Socket> source = Socket::CreateSocket(c.Get(sourceNode), tid);
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InetSocketAddress remote = InetSocketAddress(i.GetAddress(sinkNode, 0), 80);
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source->Connect(remote);
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if (tracing)
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{
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AsciiTraceHelper ascii;
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wifiPhy.EnableAsciiAll(ascii.CreateFileStream("wifi-simple-adhoc-grid.tr"));
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wifiPhy.EnablePcap("wifi-simple-adhoc-grid", devices);
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// Trace routing tables
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Ptr<OutputStreamWrapper> routingStream =
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Create<OutputStreamWrapper>("wifi-simple-adhoc-grid.routes", std::ios::out);
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Ipv4RoutingHelper::PrintRoutingTableAllEvery(Seconds(2), routingStream);
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Ptr<OutputStreamWrapper> neighborStream =
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Create<OutputStreamWrapper>("wifi-simple-adhoc-grid.neighbors", std::ios::out);
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Ipv4RoutingHelper::PrintNeighborCacheAllEvery(Seconds(2), neighborStream);
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// To do-- enable an IP-level trace that shows forwarding events only
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}
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// Give OLSR time to converge-- 30 seconds perhaps
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Simulator::Schedule(Seconds(30.0),
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&GenerateTraffic,
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source,
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packetSize,
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numPackets,
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interPacketInterval);
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// Output what we are doing
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NS_LOG_UNCOND("Testing from node " << sourceNode << " to " << sinkNode << " with grid distance "
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<< distance);
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Simulator::Stop(Seconds(33.0));
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Simulator::Run();
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Simulator::Destroy();
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return 0;
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}
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