/* -*- 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

 */

// End-to-end tests for Ipv4 static routing

#include "ns3/boolean.h"

#include "ns3/config.h"

#include "ns3/csma-helper.h"

#include "ns3/csma-net-device.h"

#include "ns3/inet-socket-address.h"

#include "ns3/internet-stack-helper.h"

#include "ns3/ipv4-address-helper.h"

#include "ns3/ipv4-static-routing-helper.h"

#include "ns3/node.h"

#include "ns3/node-container.h"

#include "ns3/on-off-helper.h"

#include "ns3/packet.h"

#include "ns3/packet-sink-helper.h"

#include "ns3/packet-sink.h"

#include "ns3/packet-socket-helper.h"

#include "ns3/packet-socket-address.h"

#include "ns3/point-to-point-helper.h"

#include "ns3/pointer.h"

#include "ns3/simulator.h"

#include "ns3/string.h"

#include "ns3/test.h"

#include "ns3/uinteger.h"

using namespace ns3;

class StaticRoutingSlash32TestCase : public TestCase

{

public:

  StaticRoutingSlash32TestCase ();

  virtual ~StaticRoutingSlash32TestCase ();

private:

  virtual void DoRun (void);

};

// Add some help text to this case to describe what it is intended to test

StaticRoutingSlash32TestCase::StaticRoutingSlash32TestCase ()

  : TestCase ("Slash 32 static routing example")

{

}

StaticRoutingSlash32TestCase::~StaticRoutingSlash32TestCase ()

{

}

// Test program for this 3-router scenario, using static routing

//

// (a.a.a.a/32)A<--x.x.x.0/30-->B<--y.y.y.0/30-->C(c.c.c.c/32)

//

void

StaticRoutingSlash32TestCase::DoRun (void)

{

  Ptr<Node> nA = CreateObject<Node> ();

  Ptr<Node> nB = CreateObject<Node> ();

  Ptr<Node> nC = CreateObject<Node> ();

  NodeContainer c = NodeContainer (nA, nB, nC);

  InternetStackHelper internet;

  internet.Install (c);

  // Point-to-point links

  NodeContainer nAnB = NodeContainer (nA, nB);

  NodeContainer nBnC = NodeContainer (nB, nC);

  // We create the channels first without any IP addressing information

  PointToPointHelper p2p;

  p2p.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));

  p2p.SetChannelAttribute ("Delay", StringValue ("2ms"));

  NetDeviceContainer dAdB = p2p.Install (nAnB);

  NetDeviceContainer dBdC = p2p.Install (nBnC);;

  Ptr<CsmaNetDevice> deviceA = CreateObject<CsmaNetDevice> ();

  deviceA->SetAddress (Mac48Address::Allocate ());

  nA->AddDevice (deviceA);

  Ptr<CsmaNetDevice> deviceC = CreateObject<CsmaNetDevice> ();

  deviceC->SetAddress (Mac48Address::Allocate ());

  nC->AddDevice (deviceC);

  // Later, we add IP addresses.

  Ipv4AddressHelper ipv4;

  ipv4.SetBase ("10.1.1.0", "255.255.255.252");

  Ipv4InterfaceContainer iAiB = ipv4.Assign (dAdB);

  ipv4.SetBase ("10.1.1.4", "255.255.255.252");

  Ipv4InterfaceContainer iBiC = ipv4.Assign (dBdC);

  Ptr<Ipv4> ipv4A = nA->GetObject<Ipv4> ();

  Ptr<Ipv4> ipv4B = nB->GetObject<Ipv4> ();

  Ptr<Ipv4> ipv4C = nC->GetObject<Ipv4> ();

  int32_t ifIndexA = ipv4A->AddInterface (deviceA);

  int32_t ifIndexC = ipv4C->AddInterface (deviceC);

  Ipv4InterfaceAddress ifInAddrA = Ipv4InterfaceAddress (Ipv4Address ("172.16.1.1"), Ipv4Mask ("/32"));

  ipv4A->AddAddress (ifIndexA, ifInAddrA);

  ipv4A->SetMetric (ifIndexA, 1);

  ipv4A->SetUp (ifIndexA);

  Ipv4InterfaceAddress ifInAddrC = Ipv4InterfaceAddress (Ipv4Address ("192.168.1.1"), Ipv4Mask ("/32"));

  ipv4C->AddAddress (ifIndexC, ifInAddrC);

  ipv4C->SetMetric (ifIndexC, 1);

  ipv4C->SetUp (ifIndexC);

  Ipv4StaticRoutingHelper ipv4RoutingHelper;

  // Create static routes from A to C

  Ptr<Ipv4StaticRouting> staticRoutingA = ipv4RoutingHelper.GetStaticRouting (ipv4A);

  // The ifIndex for this outbound route is 1; the first p2p link added

  staticRoutingA->AddHostRouteTo (Ipv4Address ("192.168.1.1"), Ipv4Address ("10.1.1.2"), 1);

  Ptr<Ipv4StaticRouting> staticRoutingB = ipv4RoutingHelper.GetStaticRouting (ipv4B);

  // The ifIndex we want on node B is 2; 0 corresponds to loopback, and 1 to the first point to point link

  staticRoutingB->AddHostRouteTo (Ipv4Address ("192.168.1.1"), Ipv4Address ("10.1.1.6"), 2);

  // Create the OnOff application to send UDP datagrams of size

  // 210 bytes at a rate of 448 Kb/s

  uint16_t port = 9;   // Discard port (RFC 863)

  OnOffHelper onoff ("ns3::UdpSocketFactory", 

                     Address (InetSocketAddress (ifInAddrC.GetLocal (), port)));

  onoff.SetAttribute ("DataRate", DataRateValue (DataRate (6000)));

  ApplicationContainer apps = onoff.Install (nA);

  apps.Start (Seconds (1.0));

  apps.Stop (Seconds (10.0));

  // Create a packet sink to receive these packets

  PacketSinkHelper sink ("ns3::UdpSocketFactory",

                         Address (InetSocketAddress (Ipv4Address::GetAny (), port)));

  apps = sink.Install (nC);

  apps.Start (Seconds (1.0));

  apps.Stop (Seconds (10.0));

  Simulator::Run ();

  // Check that we received 13 * 512 = 6656 bytes

  Ptr<PacketSink> sinkPtr = DynamicCast <PacketSink> (apps.Get (0));

  NS_TEST_ASSERT_MSG_EQ (sinkPtr->GetTotalRx (), 6656, "Static routing with /32 did not deliver all packets");

  Simulator::Destroy ();

}

class StaticRoutingTestSuite : public TestSuite

{

public:

  StaticRoutingTestSuite ();

};

StaticRoutingTestSuite::StaticRoutingTestSuite ()

  : TestSuite ("static-routing", UNIT)

{

  AddTestCase (new StaticRoutingSlash32TestCase);

}

// Do not forget to allocate an instance of this TestSuite

static StaticRoutingTestSuite staticRoutingTestSuite;