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/*
* SPDX-License-Identifier: GPL-2.0-only
*/
// Network topology
//
// n0 n1
// | |
// =================
// LAN
//
// - UDP flows from n0 to n1
#include "ns3/core-module.h"
#include "ns3/csma-module.h"
#include "ns3/internet-module.h"
#include "ns3/network-module.h"
#include <fstream>
using namespace ns3;
NS_LOG_COMPONENT_DEFINE("SocketOptionsIpv4");
void
ReceivePacket(Ptr<Socket> socket)
{
NS_LOG_INFO("Received one packet!");
Ptr<Packet> packet = socket->Recv();
SocketIpTosTag tosTag;
if (packet->RemovePacketTag(tosTag))
{
NS_LOG_INFO(" TOS = " << (uint32_t)tosTag.GetTos());
}
SocketIpTtlTag ttlTag;
if (packet->RemovePacketTag(ttlTag))
{
NS_LOG_INFO(" TTL = " << (uint32_t)ttlTag.GetTtl());
}
}
static void
SendPacket(Ptr<Socket> socket, uint32_t pktSize, uint32_t pktCount, Time pktInterval)
{
if (pktCount > 0)
{
socket->Send(Create<Packet>(pktSize));
Simulator::Schedule(pktInterval, &SendPacket, socket, pktSize, pktCount - 1, pktInterval);
}
else
{
socket->Close();
}
}
int
main(int argc, char* argv[])
{
//
// Allow the user to override any of the defaults and the above Bind() at
// run-time, via command-line arguments
//
uint32_t packetSize = 1024;
uint32_t packetCount = 10;
double packetInterval = 1.0;
// Socket options for IPv4, currently TOS, TTL, RECVTOS, and RECVTTL
uint32_t ipTos = 0;
bool ipRecvTos = true;
uint32_t ipTtl = 0;
bool ipRecvTtl = true;
CommandLine cmd(__FILE__);
cmd.AddValue("PacketSize", "Packet size in bytes", packetSize);
cmd.AddValue("PacketCount", "Number of packets to send", packetCount);
cmd.AddValue("Interval", "Interval between packets", packetInterval);
cmd.AddValue("IP_TOS", "IP_TOS", ipTos);
cmd.AddValue("IP_RECVTOS", "IP_RECVTOS", ipRecvTos);
cmd.AddValue("IP_TTL", "IP_TTL", ipTtl);
cmd.AddValue("IP_RECVTTL", "IP_RECVTTL", ipRecvTtl);
cmd.Parse(argc, argv);
NS_LOG_INFO("Create nodes.");
NodeContainer n;
n.Create(2);
InternetStackHelper internet;
internet.Install(n);
Address serverAddress;
NS_LOG_INFO("Create channels.");
CsmaHelper csma;
csma.SetChannelAttribute("DataRate", DataRateValue(DataRate(5000000)));
csma.SetChannelAttribute("Delay", TimeValue(MilliSeconds(2)));
csma.SetDeviceAttribute("Mtu", UintegerValue(1400));
NetDeviceContainer d = csma.Install(n);
NS_LOG_INFO("Assign IP Addresses.");
Ipv4AddressHelper ipv4;
ipv4.SetBase("10.1.1.0", "255.255.255.0");
Ipv4InterfaceContainer i = ipv4.Assign(d);
serverAddress = Address(i.GetAddress(1));
NS_LOG_INFO("Create sockets.");
// Receiver socket on n1
TypeId tid = TypeId::LookupByName("ns3::UdpSocketFactory");
Ptr<Socket> recvSink = Socket::CreateSocket(n.Get(1), tid);
InetSocketAddress local = InetSocketAddress(Ipv4Address::GetAny(), 4477);
recvSink->SetIpRecvTos(ipRecvTos);
recvSink->SetIpRecvTtl(ipRecvTtl);
recvSink->Bind(local);
recvSink->SetRecvCallback(MakeCallback(&ReceivePacket));
// Sender socket on n0
Ptr<Socket> source = Socket::CreateSocket(n.Get(0), tid);
InetSocketAddress remote = InetSocketAddress(i.GetAddress(1), 4477);
// Set socket options, it is also possible to set the options after the socket has been
// created/connected.
if (ipTos > 0)
{
source->SetIpTos(ipTos);
}
if (ipTtl > 0)
{
source->SetIpTtl(ipTtl);
}
source->Connect(remote);
AsciiTraceHelper ascii;
csma.EnableAsciiAll(ascii.CreateFileStream("socket-options-ipv4.tr"));
csma.EnablePcapAll("socket-options-ipv4", false);
// Schedule SendPacket
Time interPacketInterval = Seconds(packetInterval);
Simulator::ScheduleWithContext(source->GetNode()->GetId(),
Seconds(1),
&SendPacket,
source,
packetSize,
packetCount,
interPacketInterval);
NS_LOG_INFO("Run Simulation.");
Simulator::Run();
Simulator::Destroy();
NS_LOG_INFO("Done.");
return 0;
}
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