c_cpp fourth.cc

Posted 2021-05-14

/* -*- 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

       n0       n2-----n3
        \      /
         \    /
           n1 
*/

#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"
#include "ns3/netanim-module.h"
#include "wifi-example-apps.h"

using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("SocketBoundRoutingExample");

void SendStuffAddNewTag (Ptr<Socket> sock, Ipv4Address dstaddr, uint16_t port);
void SendStuffWithOldTag (Ptr<Socket> sock, Ipv4Address dstaddr, uint16_t port,TimestampTag tag);
void BindSock (Ptr<Socket> sock, Ptr<NetDevice> netdev);
void srcSocketRecv (Ptr<Socket> socket);
void dstSocketRecv (Ptr<Socket> socket);

std::map<uint32_t,std::vector<Ipv4Address>> mp;
std::map<uint32_t,std::vector<TimestampTag>> tagmp;

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> n0 = CreateObject<Node> ();
  Ptr<Node> n1= CreateObject<Node> ();
  Ptr<Node> n2= CreateObject<Node> ();
  Ptr<Node> n3= CreateObject<Node> ();

  NodeContainer c = NodeContainer (n0,n1,n2,n3);

  InternetStackHelper internet;
  internet.Install (c);

  // Point-to-point links
  NodeContainer x0 = NodeContainer (n0,n1);
  NodeContainer x1 = NodeContainer (n1,n2);
  NodeContainer x2 = NodeContainer (n2,n3);

  // We create the channels first without any IP addressing information
  PointToPointHelper p2p;
  p2p.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
  p2p.SetChannelAttribute ("Delay", StringValue ("2ms"));
  NetDeviceContainer d0= p2p.Install (x0);
  NetDeviceContainer d1= p2p.Install (x1);
  NetDeviceContainer d2= p2p.Install (x2);

  // 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 interface0= ipv4.Assign (d0);
  ipv4.NewNetwork ();
  Ipv4InterfaceContainer interface1= ipv4.Assign (d1);
  ipv4.NewNetwork ();
  Ipv4InterfaceContainer interface2= ipv4.Assign (d2);

  uint32_t id0=n0->GetId();
  uint32_t id1=n1->GetId();
  uint32_t id2=n2->GetId();
  uint32_t id3=n3->GetId();

  mp.insert(std::make_pair(id0,std::vector<Ipv4Address>{interface0.GetAddress(1)}));
  mp.insert(std::make_pair(id1,std::vector<Ipv4Address>{interface0.GetAddress(0),interface1.GetAddress(1)}));
  mp.insert(std::make_pair(id2,std::vector<Ipv4Address>{interface1.GetAddress(0),interface2.GetAddress(1)}));
  mp.insert(std::make_pair(id3,std::vector<Ipv4Address>{interface2.GetAddress(0)}));


  // Ptr<Ipv4> ipv4_0 =n0->GetObject<Ipv4> ();
  // Ptr<Ipv4> ipv4_1=n1->GetObject<Ipv4> ();
  // Ptr<Ipv4> ipv4_2=n2->GetObject<Ipv4> ();
  // Ptr<Ipv4> ipv4_3=n3->GetObject<Ipv4> ();
  // Ptr<Ipv4> ipv4_4=n4->GetObject<Ipv4> ();

  // Ipv4StaticRoutingHelper ipv4RoutingHelper;
  // Ptr<Ipv4StaticRouting> staticRoutingSrc = ipv4RoutingHelper.GetStaticRouting (ipv4_0);
  // 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 (n0, TypeId::LookupByName ("ns3::UdpSocketFactory"));
  srcSocket->Bind ();
  srcSocket->SetRecvCallback (MakeCallback (&dstSocketRecv));

  Ptr<Socket> midSocket = Socket::CreateSocket (n1, TypeId::LookupByName ("ns3::UdpSocketFactory"));
  uint16_t dstport = 12345;
  Ipv4Address dstaddr ("0.0.0.0");
  InetSocketAddress dst = InetSocketAddress (dstaddr, dstport);
  midSocket->Bind (dst);
  midSocket->SetRecvCallback (MakeCallback (&dstSocketRecv));

  Ptr<Socket> dstSocket = Socket::CreateSocket (n2, TypeId::LookupByName ("ns3::UdpSocketFactory"));
  dstSocket->Bind (dst);
  dstSocket->SetRecvCallback (MakeCallback (&dstSocketRecv));

  Ptr<Socket> dstSocket4 = Socket::CreateSocket (n3, TypeId::LookupByName ("ns3::UdpSocketFactory"));
  dstSocket4->Bind (dst);
  dstSocket4->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);

  AnimationInterface anim ("bound.xml");

  // First packet as normal (goes via Rtr1)
  // todo
  Simulator::Schedule (Seconds (0.1),&SendStuffAddNewTag, srcSocket,interface0.GetAddress(1), 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 SendStuffAddNewTag (Ptr<Socket> sock, Ipv4Address dstaddr, uint16_t port)
{
  Ptr<Packet> p = Create<Packet> ();
  p->AddPaddingAtEnd (100);

  TimestampTag timestamp;
  timestamp.SetTimestamp (Simulator::Now ());
  p->AddByteTag (timestamp);

  sock->SendTo (p, 0, InetSocketAddress (dstaddr,port));
  return;
}

void SendStuffWithOldTag(Ptr<Socket> sock, Ipv4Address dstaddr, uint16_t port,TimestampTag tag)
{
  Ptr<Packet> p = Create<Packet> ();
  p->AddPaddingAtEnd (100);

  p->AddByteTag (tag);

  sock->SendTo (p, 0, InetSocketAddress (dstaddr,port));
  return;
}

void BindSock (Ptr<Socket> sock, Ptr<NetDevice> netdev)
{
  sock->BindToNetDevice (netdev);
  return;
}

void
dstSocketRecv (Ptr<Socket> socket)
{
  Address from;
  Ptr<Packet> packet = socket->RecvFrom (from);
  uint32_t id=socket->GetNode()->GetId();

  std::vector<Ipv4Address> v=mp.find(id)->second;
  ByteTagIterator it=packet-> GetByteTagIterator() ;
  TimestampTag tag;
  it.Next().GetTag(tag);

  std::vector<TimestampTag> tagvector=tagmp.find(id)->second;
  for(unsigned int i=0;i<tagvector.size();i++){
    if(tag.Compare(tagvector[i])==0){
      NS_LOG_INFO("The "<<id<<" node receive a packet with an old timestamptag");
      return;
    }
  }
  NS_LOG_INFO("The "<<id<<" node receive a packet with a NEW timestamptag");
  tagvector.push_back(tag);
  tagmp.insert(std::make_pair(id,tagvector));

  for(unsigned int i=0;i<v.size();i++){
    NS_LOG_INFO ("The "<<id<<" node send the "<<i<<" th"<<std::endl);
    SendStuffWithOldTag (socket,v[i] ,12345, tag);
  }
}

//----------------------------------------------------------------------
//-- TimestampTag
//------------------------------------------------------
TypeId 
TimestampTag::GetTypeId (void)
{
  static TypeId tid = TypeId ("TimestampTag")
    .SetParent<Tag> ()
    .AddConstructor<TimestampTag> ()
    .AddAttribute ("Timestamp",
                   "Some momentous point in time!",
                   EmptyAttributeValue (),
                   MakeTimeAccessor (&TimestampTag::GetTimestamp),
                   MakeTimeChecker ())
  ;
  return tid;
}
TypeId 
TimestampTag::GetInstanceTypeId (void) const
{
  return GetTypeId ();
}

uint32_t 
TimestampTag::GetSerializedSize (void) const
{
  return 8;
}
void 
TimestampTag::Serialize (TagBuffer i) const
{
  int64_t t = m_timestamp.GetNanoSeconds ();
  i.Write ((const uint8_t *)&t, 8);
}
void 
TimestampTag::Deserialize (TagBuffer i)
{
  int64_t t;
  i.Read ((uint8_t *)&t, 8);
  m_timestamp = NanoSeconds (t);
}

void
TimestampTag::SetTimestamp (Time time)
{
  m_timestamp = time;
}
Time
TimestampTag::GetTimestamp (void) const
{
  return m_timestamp;
}

void 
TimestampTag::Print (std::ostream &os) const
{
  os << "t=" << m_timestamp;
}

int TimestampTag::Compare(TimestampTag& t)const
{
  int x=m_timestamp.Compare(t.GetTimestamp());
  if(x==0){
    return 0;
  }else{
    return 1;
  }
}