210 lines
7.9 KiB
C++
210 lines
7.9 KiB
C++
/*
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* SPDX-License-Identifier: GPL-2.0-only
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*
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*/
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/* Test program for multi-interface host, static routing
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Destination host (10.20.1.2)
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| 10.20.1.0/24
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DSTRTR
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10.10.1.0/24 / \ 10.10.2.0/24
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/ \
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Rtr1 Rtr2
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10.1.1.0/24 | | 10.1.2.0/24
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| /
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\ /
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Source
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*/
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#include "ns3/core-module.h"
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#include "ns3/internet-module.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/network-module.h"
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#include "ns3/point-to-point-module.h"
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#include <cassert>
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#include <fstream>
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#include <iostream>
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#include <string>
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE("SocketBoundRoutingExample");
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void SendStuff(Ptr<Socket> sock, Ipv4Address dstaddr, uint16_t port);
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void BindSock(Ptr<Socket> sock, Ptr<NetDevice> netdev);
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void srcSocketRecv(Ptr<Socket> socket);
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void dstSocketRecv(Ptr<Socket> socket);
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int
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main(int argc, char* argv[])
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{
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// Allow the user to override any of the defaults and the above
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// DefaultValue::Bind ()s at run-time, via command-line arguments
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CommandLine cmd(__FILE__);
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cmd.Parse(argc, argv);
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Ptr<Node> nSrc = CreateObject<Node>();
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Ptr<Node> nDst = CreateObject<Node>();
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Ptr<Node> nRtr1 = CreateObject<Node>();
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Ptr<Node> nRtr2 = CreateObject<Node>();
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Ptr<Node> nDstRtr = CreateObject<Node>();
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NodeContainer c = NodeContainer(nSrc, nDst, nRtr1, nRtr2, nDstRtr);
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InternetStackHelper internet;
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internet.Install(c);
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// Point-to-point links
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NodeContainer nSrcnRtr1 = NodeContainer(nSrc, nRtr1);
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NodeContainer nSrcnRtr2 = NodeContainer(nSrc, nRtr2);
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NodeContainer nRtr1nDstRtr = NodeContainer(nRtr1, nDstRtr);
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NodeContainer nRtr2nDstRtr = NodeContainer(nRtr2, nDstRtr);
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NodeContainer nDstRtrnDst = NodeContainer(nDstRtr, nDst);
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// We create the channels first without any IP addressing information
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PointToPointHelper p2p;
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p2p.SetDeviceAttribute("DataRate", StringValue("5Mbps"));
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p2p.SetChannelAttribute("Delay", StringValue("2ms"));
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NetDeviceContainer dSrcdRtr1 = p2p.Install(nSrcnRtr1);
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NetDeviceContainer dSrcdRtr2 = p2p.Install(nSrcnRtr2);
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NetDeviceContainer dRtr1dDstRtr = p2p.Install(nRtr1nDstRtr);
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NetDeviceContainer dRtr2dDstRtr = p2p.Install(nRtr2nDstRtr);
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NetDeviceContainer dDstRtrdDst = p2p.Install(nDstRtrnDst);
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Ptr<NetDevice> SrcToRtr1 = dSrcdRtr1.Get(0);
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Ptr<NetDevice> SrcToRtr2 = dSrcdRtr2.Get(0);
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// Later, we add IP addresses.
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Ipv4AddressHelper ipv4;
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ipv4.SetBase("10.1.1.0", "255.255.255.0");
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Ipv4InterfaceContainer iSrciRtr1 = ipv4.Assign(dSrcdRtr1);
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ipv4.SetBase("10.1.2.0", "255.255.255.0");
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Ipv4InterfaceContainer iSrciRtr2 = ipv4.Assign(dSrcdRtr2);
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ipv4.SetBase("10.10.1.0", "255.255.255.0");
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Ipv4InterfaceContainer iRtr1iDstRtr = ipv4.Assign(dRtr1dDstRtr);
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ipv4.SetBase("10.10.2.0", "255.255.255.0");
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Ipv4InterfaceContainer iRtr2iDstRtr = ipv4.Assign(dRtr2dDstRtr);
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ipv4.SetBase("10.20.1.0", "255.255.255.0");
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Ipv4InterfaceContainer iDstRtrDst = ipv4.Assign(dDstRtrdDst);
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Ptr<Ipv4> ipv4Src = nSrc->GetObject<Ipv4>();
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Ptr<Ipv4> ipv4Rtr1 = nRtr1->GetObject<Ipv4>();
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Ptr<Ipv4> ipv4Rtr2 = nRtr2->GetObject<Ipv4>();
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Ptr<Ipv4> ipv4DstRtr = nDstRtr->GetObject<Ipv4>();
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Ptr<Ipv4> ipv4Dst = nDst->GetObject<Ipv4>();
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Ipv4StaticRoutingHelper ipv4RoutingHelper;
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Ptr<Ipv4StaticRouting> staticRoutingSrc = ipv4RoutingHelper.GetStaticRouting(ipv4Src);
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Ptr<Ipv4StaticRouting> staticRoutingRtr1 = ipv4RoutingHelper.GetStaticRouting(ipv4Rtr1);
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Ptr<Ipv4StaticRouting> staticRoutingRtr2 = ipv4RoutingHelper.GetStaticRouting(ipv4Rtr2);
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Ptr<Ipv4StaticRouting> staticRoutingDstRtr = ipv4RoutingHelper.GetStaticRouting(ipv4DstRtr);
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Ptr<Ipv4StaticRouting> staticRoutingDst = ipv4RoutingHelper.GetStaticRouting(ipv4Dst);
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// Create static routes from Src to Dst
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staticRoutingRtr1->AddHostRouteTo(Ipv4Address("10.20.1.2"), Ipv4Address("10.10.1.2"), 2);
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staticRoutingRtr2->AddHostRouteTo(Ipv4Address("10.20.1.2"), Ipv4Address("10.10.2.2"), 2);
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// Two routes to same destination - setting separate metrics.
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// You can switch these to see how traffic gets diverted via different routes
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staticRoutingSrc->AddHostRouteTo(Ipv4Address("10.20.1.2"), Ipv4Address("10.1.1.2"), 1, 5);
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staticRoutingSrc->AddHostRouteTo(Ipv4Address("10.20.1.2"), Ipv4Address("10.1.2.2"), 2, 10);
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// Creating static routes from DST to Source pointing to Rtr1 VIA Rtr2(!)
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staticRoutingDst->AddHostRouteTo(Ipv4Address("10.1.1.1"), Ipv4Address("10.20.1.1"), 1);
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staticRoutingDstRtr->AddHostRouteTo(Ipv4Address("10.1.1.1"), Ipv4Address("10.10.2.1"), 2);
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staticRoutingRtr2->AddHostRouteTo(Ipv4Address("10.1.1.1"), Ipv4Address("10.1.2.1"), 1);
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// There are no apps that can utilize the Socket Option so doing the work directly..
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// Taken from tcp-large-transfer example
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Ptr<Socket> srcSocket =
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Socket::CreateSocket(nSrc, TypeId::LookupByName("ns3::UdpSocketFactory"));
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srcSocket->Bind();
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srcSocket->SetRecvCallback(MakeCallback(&srcSocketRecv));
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Ptr<Socket> dstSocket =
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Socket::CreateSocket(nDst, TypeId::LookupByName("ns3::UdpSocketFactory"));
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uint16_t dstport = 12345;
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Ipv4Address dstaddr("10.20.1.2");
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InetSocketAddress dst = InetSocketAddress(dstaddr, dstport);
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dstSocket->Bind(dst);
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dstSocket->SetRecvCallback(MakeCallback(&dstSocketRecv));
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AsciiTraceHelper ascii;
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p2p.EnableAsciiAll(ascii.CreateFileStream("socket-bound-static-routing.tr"));
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p2p.EnablePcapAll("socket-bound-static-routing");
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LogComponentEnableAll(LOG_PREFIX_TIME);
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LogComponentEnable("SocketBoundRoutingExample", LOG_LEVEL_INFO);
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// First packet as normal (goes via Rtr1)
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Simulator::Schedule(Seconds(0.1), &SendStuff, srcSocket, dstaddr, dstport);
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// Second via Rtr1 explicitly
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Simulator::Schedule(Seconds(1), &BindSock, srcSocket, SrcToRtr1);
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Simulator::Schedule(Seconds(1.1), &SendStuff, srcSocket, dstaddr, dstport);
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// Third via Rtr2 explicitly
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Simulator::Schedule(Seconds(2), &BindSock, srcSocket, SrcToRtr2);
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Simulator::Schedule(Seconds(2.1), &SendStuff, srcSocket, dstaddr, dstport);
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// Fourth again as normal (goes via Rtr1)
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Simulator::Schedule(Seconds(3), &BindSock, srcSocket, Ptr<NetDevice>(nullptr));
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Simulator::Schedule(Seconds(3.1), &SendStuff, srcSocket, dstaddr, dstport);
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// If you uncomment what's below, it results in ASSERT failing since you can't
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// bind to a socket not existing on a node
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// Simulator::Schedule(Seconds(4),&BindSock, srcSocket, dDstRtrdDst.Get(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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void
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SendStuff(Ptr<Socket> sock, Ipv4Address dstaddr, uint16_t port)
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{
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Ptr<Packet> p = Create<Packet>();
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p->AddPaddingAtEnd(100);
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sock->SendTo(p, 0, InetSocketAddress(dstaddr, port));
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}
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void
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BindSock(Ptr<Socket> sock, Ptr<NetDevice> netdev)
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{
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sock->BindToNetDevice(netdev);
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}
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void
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srcSocketRecv(Ptr<Socket> socket)
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{
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Address from;
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Ptr<Packet> packet = socket->RecvFrom(from);
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packet->RemoveAllPacketTags();
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packet->RemoveAllByteTags();
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NS_LOG_INFO("Source Received " << packet->GetSize() << " bytes from "
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<< InetSocketAddress::ConvertFrom(from).GetIpv4());
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if (socket->GetBoundNetDevice())
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{
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NS_LOG_INFO("Socket was bound");
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}
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else
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{
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NS_LOG_INFO("Socket was not bound");
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}
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}
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void
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dstSocketRecv(Ptr<Socket> socket)
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{
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Address from;
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Ptr<Packet> packet = socket->RecvFrom(from);
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packet->RemoveAllPacketTags();
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packet->RemoveAllByteTags();
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InetSocketAddress address = InetSocketAddress::ConvertFrom(from);
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NS_LOG_INFO("Destination Received " << packet->GetSize() << " bytes from "
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<< address.GetIpv4());
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NS_LOG_INFO("Triggering packet back to source node's interface 1");
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SendStuff(socket, Ipv4Address("10.1.1.1"), address.GetPort());
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}
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