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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* 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
*
*/
/* Test program for multi-interface host, static routing
Destination host (10.20.1.2)
|
| 10.20.1.0/24
DSTRTR
10.10.1.0/24 / \ 10.10.2.0/24
/ \
Rtr1 Rtr2
10.1.1.0/24 | | 10.1.2.0/24
| /
\ /
Source
*/
#include <iostream>
#include <fstream>
#include <string>
#include <cassert>
#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/internet-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/ipv4-static-routing-helper.h"
#include "ns3/ipv4-list-routing-helper.h"
using namespace ns3;
NS_LOG_COMPONENT_DEFINE ("SocketBoundRoutingExample");
void SendStuff (Ptr<Socket> sock, Ipv4Address dstaddr, uint16_t port);
void BindSock (Ptr<Socket> sock, Ptr<NetDevice> netdev);
void srcSocketRecv (Ptr<Socket> socket);
void dstSocketRecv (Ptr<Socket> socket);
int
main (int argc, char *argv[])
{
// Allow the user to override any of the defaults and the above
// DefaultValue::Bind ()s at run-time, via command-line arguments
CommandLine cmd;
cmd.Parse (argc, argv);
Ptr<Node> nSrc = CreateObject<Node> ();
Ptr<Node> nDst = CreateObject<Node> ();
Ptr<Node> nRtr1 = CreateObject<Node> ();
Ptr<Node> nRtr2 = CreateObject<Node> ();
Ptr<Node> nDstRtr = CreateObject<Node> ();
NodeContainer c = NodeContainer (nSrc, nDst, nRtr1, nRtr2, nDstRtr);
InternetStackHelper internet;
internet.Install (c);
// Point-to-point links
NodeContainer nSrcnRtr1 = NodeContainer (nSrc, nRtr1);
NodeContainer nSrcnRtr2 = NodeContainer (nSrc, nRtr2);
NodeContainer nRtr1nDstRtr = NodeContainer (nRtr1, nDstRtr);
NodeContainer nRtr2nDstRtr = NodeContainer (nRtr2, nDstRtr);
NodeContainer nDstRtrnDst = NodeContainer (nDstRtr, nDst);
// We create the channels first without any IP addressing information
PointToPointHelper p2p;
p2p.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
p2p.SetChannelAttribute ("Delay", StringValue ("2ms"));
NetDeviceContainer dSrcdRtr1 = p2p.Install (nSrcnRtr1);
NetDeviceContainer dSrcdRtr2 = p2p.Install (nSrcnRtr2);
NetDeviceContainer dRtr1dDstRtr = p2p.Install (nRtr1nDstRtr);
NetDeviceContainer dRtr2dDstRtr = p2p.Install (nRtr2nDstRtr);
NetDeviceContainer dDstRtrdDst = p2p.Install (nDstRtrnDst);
Ptr<NetDevice> SrcToRtr1=dSrcdRtr1.Get (0);
Ptr<NetDevice> SrcToRtr2=dSrcdRtr2.Get (0);
// Later, we add IP addresses.
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.1.1.0", "255.255.255.0");
Ipv4InterfaceContainer iSrciRtr1 = ipv4.Assign (dSrcdRtr1);
ipv4.SetBase ("10.1.2.0", "255.255.255.0");
Ipv4InterfaceContainer iSrciRtr2 = ipv4.Assign (dSrcdRtr2);
ipv4.SetBase ("10.10.1.0", "255.255.255.0");
Ipv4InterfaceContainer iRtr1iDstRtr = ipv4.Assign (dRtr1dDstRtr);
ipv4.SetBase ("10.10.2.0", "255.255.255.0");
Ipv4InterfaceContainer iRtr2iDstRtr = ipv4.Assign (dRtr2dDstRtr);
ipv4.SetBase ("10.20.1.0", "255.255.255.0");
Ipv4InterfaceContainer iDstRtrDst = ipv4.Assign (dDstRtrdDst);
Ptr<Ipv4> ipv4Src = nSrc->GetObject<Ipv4> ();
Ptr<Ipv4> ipv4Rtr1 = nRtr1->GetObject<Ipv4> ();
Ptr<Ipv4> ipv4Rtr2 = nRtr2->GetObject<Ipv4> ();
Ptr<Ipv4> ipv4DstRtr = nDstRtr->GetObject<Ipv4> ();
Ptr<Ipv4> ipv4Dst = nDst->GetObject<Ipv4> ();
Ipv4StaticRoutingHelper ipv4RoutingHelper;
Ptr<Ipv4StaticRouting> staticRoutingSrc = ipv4RoutingHelper.GetStaticRouting (ipv4Src);
Ptr<Ipv4StaticRouting> staticRoutingRtr1 = ipv4RoutingHelper.GetStaticRouting (ipv4Rtr1);
Ptr<Ipv4StaticRouting> staticRoutingRtr2 = ipv4RoutingHelper.GetStaticRouting (ipv4Rtr2);
Ptr<Ipv4StaticRouting> staticRoutingDstRtr = ipv4RoutingHelper.GetStaticRouting (ipv4DstRtr);
Ptr<Ipv4StaticRouting> staticRoutingDst = ipv4RoutingHelper.GetStaticRouting (ipv4Dst);
// Create static routes from Src to Dst
staticRoutingRtr1->AddHostRouteTo (Ipv4Address ("10.20.1.2"), Ipv4Address ("10.10.1.2"), 2);
staticRoutingRtr2->AddHostRouteTo (Ipv4Address ("10.20.1.2"), Ipv4Address ("10.10.2.2"), 2);
// Two routes to same destination - setting separate metrics.
// You can switch these to see how traffic gets diverted via different routes
staticRoutingSrc->AddHostRouteTo (Ipv4Address ("10.20.1.2"), Ipv4Address ("10.1.1.2"), 1,5);
staticRoutingSrc->AddHostRouteTo (Ipv4Address ("10.20.1.2"), Ipv4Address ("10.1.2.2"), 2,10);
// Creating static routes from DST to Source pointing to Rtr1 VIA Rtr2(!)
staticRoutingDst->AddHostRouteTo (Ipv4Address ("10.1.1.1"), Ipv4Address ("10.20.1.1"), 1);
staticRoutingDstRtr->AddHostRouteTo (Ipv4Address ("10.1.1.1"), Ipv4Address ("10.10.2.1"), 2);
staticRoutingRtr2->AddHostRouteTo (Ipv4Address ("10.1.1.1"), Ipv4Address ("10.1.2.1"), 1);
// There are no apps that can utilize the Socket Option so doing the work directly..
// Taken from tcp-large-transfer example
Ptr<Socket> srcSocket = Socket::CreateSocket (nSrc, TypeId::LookupByName ("ns3::UdpSocketFactory"));
srcSocket->Bind ();
srcSocket->SetRecvCallback (MakeCallback (&srcSocketRecv));
Ptr<Socket> dstSocket = Socket::CreateSocket (nDst, TypeId::LookupByName ("ns3::UdpSocketFactory"));
uint16_t dstport = 12345;
Ipv4Address dstaddr ("10.20.1.2");
InetSocketAddress dst = InetSocketAddress (dstaddr, dstport);
dstSocket->Bind (dst);
dstSocket->SetRecvCallback (MakeCallback (&dstSocketRecv));
AsciiTraceHelper ascii;
p2p.EnableAsciiAll (ascii.CreateFileStream ("socket-bound-static-routing.tr"));
p2p.EnablePcapAll ("socket-bound-static-routing");
LogComponentEnableAll (LOG_PREFIX_TIME);
LogComponentEnable ("SocketBoundRoutingExample", LOG_LEVEL_INFO);
// First packet as normal (goes via Rtr1)
Simulator::Schedule (Seconds (0.1),&SendStuff, srcSocket, dstaddr, dstport);
// Second via Rtr1 explicitly
Simulator::Schedule (Seconds (1.0),&BindSock, srcSocket, SrcToRtr1);
Simulator::Schedule (Seconds ( 1.1),&SendStuff, srcSocket, dstaddr, dstport);
// Third via Rtr2 explicitly
Simulator::Schedule (Seconds (2.0),&BindSock, srcSocket, SrcToRtr2);
Simulator::Schedule (Seconds (2.1),&SendStuff, srcSocket, dstaddr, dstport);
// Fourth again as normal (goes via Rtr1)
Simulator::Schedule (Seconds (3.0),&BindSock, srcSocket, Ptr<NetDevice>(0));
Simulator::Schedule (Seconds (3.1),&SendStuff, srcSocket, dstaddr, dstport);
// If you uncomment what's below, it results in ASSERT failing since you can't
// bind to a socket not existing on a node
// Simulator::Schedule(Seconds(4.0),&BindSock, srcSocket, dDstRtrdDst.Get(0));
Simulator::Run ();
Simulator::Destroy ();
return 0;
}
void SendStuff (Ptr<Socket> sock, Ipv4Address dstaddr, uint16_t port)
{
Ptr<Packet> p = Create<Packet> ();
p->AddPaddingAtEnd (100);
sock->SendTo (p, 0, InetSocketAddress (dstaddr,port));
return;
}
void BindSock (Ptr<Socket> sock, Ptr<NetDevice> netdev)
{
sock->BindToNetDevice (netdev);
return;
}
void
srcSocketRecv (Ptr<Socket> socket)
{
Address from;
Ptr<Packet> packet = socket->RecvFrom (from);
packet->RemoveAllPacketTags ();
packet->RemoveAllByteTags ();
NS_LOG_INFO ("Source Received " << packet->GetSize () << " bytes from " << InetSocketAddress::ConvertFrom (from).GetIpv4 ());
if (socket->GetBoundNetDevice ())
{
NS_LOG_INFO ("Socket was bound");
}
else
{
NS_LOG_INFO ("Socket was not bound");
}
}
void
dstSocketRecv (Ptr<Socket> socket)
{
Address from;
Ptr<Packet> packet = socket->RecvFrom (from);
packet->RemoveAllPacketTags ();
packet->RemoveAllByteTags ();
InetSocketAddress address = InetSocketAddress::ConvertFrom (from);
NS_LOG_INFO ("Destination Received " << packet->GetSize () << " bytes from " << address.GetIpv4 ());
NS_LOG_INFO ("Triggering packet back to source node's interface 1");
SendStuff (socket, Ipv4Address ("10.1.1.1"), address.GetPort ());
}
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