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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2015 - Chip Webb
*
* 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
*
* Author: Chip Webb <ns3 (at) chipwebb.com>
*
*/
// ###################################################################### //
// Network topology //
// ---------------------------------------------------------------------- //
// //
// This example shows two L2 LANs connected by a WAN link and illustrates //
// a network that has multiple L2 switches between L3 routers. //
// //
// It serves as a test case to verify a patch to global-router-interface //
// that fixes a previous bug (#2102 in the ns-3 tracker) but is also //
// another example program. //
// //
// The LANs are "top" [192.168.1/24] and "bottom" [192.168.2/24]. //
// Each LAN network is interconnected by several L2 switches, and each //
// LAN has its own router to act as a gateway with the WAN. Each LAN //
// has two endpoints upon which is installed a UDP echo client or server //
// that are used to test connectivity over the LANs & WAN. //
// //
// One pair of UDP endpoints (t3 and b3) have LAN connections with only //
// one switch between them and their local routers. This path works with //
// unpatched ns3 code (3.24 & earlier) as well as with the patch applied. //
// //
// Another pair of endpoints (t2 and b2) have LAN connections with //
// a chain of multiple switches between them and their local router. //
// This path will only work after applying the associated patch. //
// //
// The LAN links are modeled by half-duplex Ethernet CSMA links which //
// have command-line-configurable data rate and latency. //
// //
// There are two types of CSMA links: 100Mbit and 10Mbit. The 100Mbit //
// links are called csmaX, are denoted by [X] in the diagram and can //
// be controlled with the --csmaXRate and --csmaXDelay command line args. //
// The 10Mbit links are called csmaY, are denoted by [Y] in the diagram //
// and can be controlled with the --csmaYRate and --csmaYDelay command //
// line arguments. Both the top and bottom LAN have a mixture of //
// 100Mbit/s and 10Mbit/s links. //
// //
// The WAN is modeled by a point-to-point link which has configurable //
// data rate and latency. Unlike many typical home/work networks, //
// the routers do not perform NAT. //
// //
// The WAN link is denoted by [P] in the diagram, and the //
// speed and latency can be set from the command line with the //
// --p2pRate and --p2pDelay options. The default for this link is 5Mbit/s //
// and 50ms delay //
// //
// Note: Names in parenthesis after NetDevices are pcap tap locations. //
// //
// ---------------------------------------------------------------------- //
// //
// 192.168. 192.168. //
// .1.2 .1.3 //
// --------- --------- //
// | t2 | | t3 | //
// | UDP | | UDP | //
// | echo | | echo | Node t2 is a UDP echo client (multi-switch) //
// | client| | server| Node t3 is a UDP echo server (single-switch) //
// --------- --------- //
// CSMA(t2) CSMA(t3) //
// [X] [X] //
// [X] [X] //
// CSMA [X] //
// --------- [X] //
// | ts4 | [X] Nodes ts1, ts2, ts3 and ts4 are L2 switches //
// | (sw) | [X] The top LAN is subnet 192.168.1.* //
// --------- [X] //
// CSMA [X] The long chain of switches is designed //
// [Y] [X] to test whether global-router-interface //
// [Y] [X] can fully enumerate an IP subnet that has //
// CSMA [X] multiple interconnected L2 switches. //
// --------- [X] The problem is documented in Bug #2102. //
// | ts3 | [X] //
// | (sw) | [X] //
// --------- [X] //
// CSMA [X] //
// [X] [X] //
// [X] [X] //
// CSMA [X] //
// --------- [X] //
// | ts2 | [X] //
// | (sw) | [X] //
// --------- [X] //
// CSMA [X] //
// [Y] [X] //
// [Y] [X] //
// CSMA CSMA //
// ------------------ //
// | ts1 (switch) | //
// ------------------ //
// CSMA //
// [Y] //
// [Y] //
// CSMA(trlan) 192.168.1.1 //
// ------------------ //
// | tr (router) | Node tr is an L3 router //
// ------------------ (between 192.168.1.* & 76.1.1.*) //
// P2P(trwan) 76.1.1.1 //
// [P] //
// [P] //
// [P] //
// [P] //
// [P] The WAN is 76.1.1.* //
// [P] //
// [P] //
// [P] //
// P2P(brwan) 76.1.1.2 //
// ------------------ //
// | br (router) | Node br is an L3 router //
// ------------------ (between 192.168.2.* & 76.1.1.*) //
// CSMA(brlan) 192.168.2.1 //
// [X] //
// [X] //
// CSMA //
// ------------------ Nodes bs1 to bs5 are L2 switches //
// | bs1 (switch) | The bottom LAN is subnet 192.168.2.* //
// ------------------ //
// CSMA CSMA //
// [Y] [Y] //
// [Y] [Y] //
// CSMA [Y] //
// --------- [Y] //
// | bs2 | [Y] //
// | (sw) | [Y] //
// --------- [Y] //
// CSMA [Y] //
// [X] [Y] //
// [X] [Y] //
// CSMA [Y] //
// --------- [Y] //
// | bs3 | [Y] //
// | (sw) | [Y] //
// --------- [Y] //
// CSMA [Y] //
// [Y] [Y] //
// [Y] [Y] //
// CSMA [Y] //
// --------- [Y] //
// | bs4 | [Y] //
// | (sw) | [Y] //
// --------- [Y] //
// CSMA [Y] //
// [X] [Y] //
// [X] [Y] //
// CSMA [Y] //
// --------- [Y] //
// | bs5 | [Y] //
// | (sw) | [Y] //
// --------- [Y] //
// CSMA [Y] //
// [Y] [Y] //
// [Y] [Y] //
// CSMA(b2) CSMA(b3) //
// --------- --------- //
// | b2 | | b3 | //
// | UDP | | UDP | //
// | echo | | echo | Node b2 is a UDP echo server (multi-switch) //
// | server| | client| Node b3 is a UDP echo client (single-switch) //
// --------- --------- //
// 192.168. 192.168. //
// .2.2 .2.3 //
// //
// ---------------------------------------------------------------------- //
// Explanation //
// ---------------------------------------------------------------------- //
// //
// UDP packet flows are configured between nodes on the top and bottom //
// LANs (using UDP echo client & server). //
// //
// The network carrying the "multi switch" UDP flow is connected with //
// multiple L2 switches between L3 nodes so it should only work if the //
// global-router-interface source code properly supports bridging. //
// //
// The network carrying the "single switch" UDP flow is connected with //
// only one L2 switch between L3 nodes so it should work with or //
// without the patch //
// //
// = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = //
// Traffic summary: //
// ---------------------------------------------------------------------- //
// //
// - UDP flow from t2 (192.168.1.2) to b2 (192.168.2.2) [Multi Switch] //
// from b3 (192.168.2.3) to t3 (192.168.1.3) [Single Switch] //
// //
// = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = //
// Node List & IP addresses assigned during simulation //
// ---------------------------------------------------------------------- //
// t2 : 192.168.1.2 : Top multi-switch UDP echo client //
// t3 : 192.168.1.3 : Top single-switch UDP echo server //
// : //
// ts1 : <no IP> : Top switch 1 (bridge) //
// ts2 : <no IP> : Top switch 2 (bridge) //
// ts3 : <no IP> : Top switch 3 (bridge) //
// ts4 : <no IP> : Top switch 4 (bridge) //
// : //
// tr : 192.168.1.1 : Router connecting top LAN (192.168.1.*) //
// : 76.1.1.1 : to the WAN //
// : //
// br : 76.1.1.2 : Router connecting the WAN //
// : 192.168.2.1 : to bot LAN (192.168.2.*) //
// : //
// bs1 : <no IP> : Bottom switch 1 (bridge) //
// bs2 : <no IP> : Bottom switch 2 (bridge) //
// bs3 : <no IP> : Bottom switch 3 (bridge) //
// bs4 : <no IP> : Bottom switch 4 (bridge) //
// bs5 : <no IP> : Bottom switch 5 (bridge) //
// : //
// b2 : 192.168.2.2 : Bottom multi-switch UDP echo server //
// b3 : 192.168.2.3 : Bottom single-switch UDP echo client //
// : //
// ---------------------------------------------------------------------- //
// Author: Chip Webb <ns3 (a) chipwebb dot com> //
// ###################################################################### //
#include <iostream>
#include <fstream>
#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/applications-module.h"
#include "ns3/bridge-module.h"
#include "ns3/csma-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/internet-module.h"
using namespace ns3;
// ########################################################################
// Main routine
// ########################################################################
NS_LOG_COMPONENT_DEFINE ("GlobalRoutingMultiSwitchPlusRouter");
#define vssearch(loc,vec) std::find ((vec).begin (), (vec).end (), (loc)) != (vec).end ()
int
main (int argc, char *argv[])
{
// ----------------------------------------------------------------------
// Default values for command line arguments
// ----------------------------------------------------------------------
bool verbose = true;
int simDurationSeconds = 60;
bool enableUdpMultiSW = true;
bool enableUdpSingleSW = true;
std::string pcapLocations = "";
uint32_t snapLen = PcapFile::SNAPLEN_DEFAULT;
std::string csmaXLinkDataRate = "100Mbps";
std::string csmaXLinkDelay = "500ns";
std::string csmaYLinkDataRate = "10Mbps";
std::string csmaYLinkDelay = "500ns";
std::string p2pLinkDataRate = "5Mbps";
std::string p2pLinkDelay = "50ms";
uint16_t udpEchoPort = 9; // The well-known UDP echo port
// ----------------------------------------------------------------------
// Create command line options and get them
// ----------------------------------------------------------------------
CommandLine cmd;
cmd.Usage ("NOTE: valid --pcap arguments are: 't2,t3,b2,b3,trlan,trwan,brlan,brwan'");
cmd.AddValue ("verbose", "Enable printing informational messages", verbose);
cmd.AddValue ("duration", "Duration of simulation.", simDurationSeconds);
cmd.AddValue ("udpMultiSW", "Enable udp over multi-switch links", enableUdpMultiSW);
cmd.AddValue ("udpSingleSW", "Enable udp over single-switch links", enableUdpSingleSW);
cmd.AddValue ("pcap", "Comma separated list of PCAP Locations to tap", pcapLocations);
cmd.AddValue ("snapLen", "PCAP packet capture length", snapLen);
cmd.AddValue ("csmaXRate", "CSMA X Link data rate", csmaXLinkDataRate);
cmd.AddValue ("csmaXDelay", "CSMA X Link delay", csmaXLinkDelay);
cmd.AddValue ("csmaYRate", "CSMA Y Link data rate", csmaYLinkDataRate);
cmd.AddValue ("csmaYDelay", "CSMA Y Link delay", csmaYLinkDelay);
cmd.AddValue ("p2pRate", "P2P Link data rate", p2pLinkDataRate);
cmd.AddValue ("p2pDelay", "P2P Link delay", p2pLinkDelay);
cmd.Parse (argc, argv);
// --------------------------------------------------------------------
// Users may find it convenient to turn on explicit debugging
// for selected modules; the below lines suggest how to do this
// --------------------------------------------------------------------
if (verbose)
{
LogComponentEnable ("GlobalRoutingMultiSwitchPlusRouter", LOG_LEVEL_INFO);
}
// ======================================================================
// Define the list of valid PCAP taps
// ----------------------------------------------------------------------
std::vector<std::string> pcapTaps;
pcapTaps.push_back ("t2"); // multi-switch UDP echo client
pcapTaps.push_back ("t3"); // single-switch UDP echo server
pcapTaps.push_back ("b2"); // multi-switch UDP echo server
pcapTaps.push_back ("b3"); // single-switch UDP echo client
pcapTaps.push_back ("trlan"); // top router LAN side
pcapTaps.push_back ("trwan"); // top router WAN side
pcapTaps.push_back ("brlan"); // bottom router LAN side
pcapTaps.push_back ("brwan"); // bottom router WAN side
// ----------------------------------------------------------------------
// Parse the pcapLocations string into pcapLocationVec
// ----------------------------------------------------------------------
std::vector<std::string> pcapLocationVec;
if (pcapLocations != "")
{
std::stringstream sStream (pcapLocations);
while ( sStream.good () )
{
std::string substr;
getline ( sStream, substr, ',' );
if (vssearch (substr,pcapTaps))
{
pcapLocationVec.push_back ( substr );
}
else
{
NS_LOG_ERROR ("WARNING: Unrecognized PCAP location: <" + substr + ">");
}
}
for (std::vector<std::string>::const_iterator
ploc = pcapLocationVec.begin ();
ploc != pcapLocationVec.end ();
++ploc)
{
NS_LOG_INFO ("PCAP capture at: <" + *ploc + ">");
}
}
// ======================================================================
// Set some simulator-wide values
// ======================================================================
// ----------------------------------------------------------------------
// Set PCAP packet capture maximum packet length
// ----------------------------------------------------------------------
if (snapLen != PcapFile::SNAPLEN_DEFAULT)
{
Config::SetDefault ("ns3::PcapFileWrapper::CaptureSize", UintegerValue (snapLen));
}
// ======================================================================
// Create the nodes & links required for the topology shown in comments above.
// ----------------------------------------------------------------------
NS_LOG_INFO ("INFO: Create nodes."); // - - - - - - - - - - - - - - - -
// Node IP : Description
// - - - - - - - - - - - - - - - -
Ptr<Node> t2 = CreateObject<Node> (); // 192.168.1.2 : Top multi-switch udp echo client
Ptr<Node> t3 = CreateObject<Node> (); // 192.168.1.3 : Top single-switch udp echo server
// :
Ptr<Node> ts1 = CreateObject<Node> (); // <no IP> : Top switch #1 (bridge)
Ptr<Node> ts2 = CreateObject<Node> (); // <no IP> : Top switch #2 (bridge)
Ptr<Node> ts3 = CreateObject<Node> (); // <no IP> : Top switch #3 (bridge)
Ptr<Node> ts4 = CreateObject<Node> (); // <no IP> : Top switch #4 (bridge)
// :
Ptr<Node> tr = CreateObject<Node> (); // 192.168.1.1 : Router connecting top LAN & WAN
// 76.1.1.1 :
// :
Ptr<Node> br = CreateObject<Node> (); // 76.1.1.2 : Router connecting WAN & bottom LANs
// 192.168.2.1 :
// :
Ptr<Node> bs1 = CreateObject<Node> (); // <no IP> : Bottom switch #1 (bridge)
Ptr<Node> bs2 = CreateObject<Node> (); // <no IP> : Bottom switch #2 (bridge)
Ptr<Node> bs3 = CreateObject<Node> (); // <no IP> : Bottom switch #3 (bridge)
Ptr<Node> bs4 = CreateObject<Node> (); // <no IP> : Bottom switch #4 (bridge)
Ptr<Node> bs5 = CreateObject<Node> (); // <no IP> : Bottom switch #5 (bridge)
// :
Ptr<Node> b2 = CreateObject<Node> (); // 192.168.2.2 : Bottom multi-switch udp echo server
Ptr<Node> b3 = CreateObject<Node> (); // 192.168.2.3 : Bottom single-switch udp echo client
// - - - - - - - - - - - - - - - -
// ----------------------------------------------------------------------
// Give the nodes names
// ----------------------------------------------------------------------
Names::Add ("t2", t2);
Names::Add ("t3", t3);
Names::Add ("ts1", ts1);
Names::Add ("ts2", ts2);
Names::Add ("ts3", ts3);
Names::Add ("ts4", ts4);
Names::Add ("tr", tr);
Names::Add ("br", br);
Names::Add ("bs1", bs1);
Names::Add ("bs2", bs2);
Names::Add ("bs3", bs3);
Names::Add ("bs4", bs4);
Names::Add ("bs5", bs5);
Names::Add ("b2", b2);
Names::Add ("b3", b3);
// ======================================================================
// Create CSMA links to use for connecting LAN nodes together
// ----------------------------------------------------------------------
// ----------------------------------------
// CSMA [X]
// ----------------------------------------
NS_LOG_INFO ("L2: Create a " <<
csmaXLinkDataRate << " " <<
csmaXLinkDelay << " CSMA link for csmaX for LANs.");
CsmaHelper csmaX;
csmaX.SetChannelAttribute ("DataRate", StringValue (csmaXLinkDataRate));
csmaX.SetChannelAttribute ("Delay", StringValue (csmaXLinkDelay));
// ----------------------------------------
// CSMA [Y]
// ----------------------------------------
NS_LOG_INFO ("L2: Create a " <<
csmaYLinkDataRate << " " <<
csmaYLinkDelay << " CSMA link for csmaY for LANs.");
CsmaHelper csmaY;
csmaY.SetChannelAttribute ("DataRate", StringValue (csmaYLinkDataRate));
csmaY.SetChannelAttribute ("Delay", StringValue (csmaYLinkDelay));
// ----------------------------------------------------------------------
// Now, connect the top LAN nodes together with csma links.
// ----------------------------------------------------------------------
NS_LOG_INFO ("L2: Connect nodes on top LAN together with half-duplex CSMA links.");
// Multi-switch top LAN chain: t2-ts4-ts3-ts2-ts1-tr
NetDeviceContainer link_t2_ts4 = csmaX.Install (NodeContainer (t2, ts4));
NetDeviceContainer link_ts4_ts3 = csmaY.Install (NodeContainer (ts4, ts3));
NetDeviceContainer link_ts3_ts2 = csmaX.Install (NodeContainer (ts3, ts2));
NetDeviceContainer link_ts2_ts1 = csmaY.Install (NodeContainer (ts2, ts1));
// Single-switch top LAN link: t3-ts1-tr
NetDeviceContainer link_t3_ts1 = csmaX.Install (NodeContainer (t3, ts1));
// Common link for top LAN between ts1 and tr (for t2 and t3 to get to tr)
NetDeviceContainer link_tr_ts1 = csmaY.Install (NodeContainer (tr, ts1));
// ----------------------------------------------------------------------
// And repeat above steps to connect the bottom LAN nodes together
// ----------------------------------------------------------------------
NS_LOG_INFO ("L2: Connect nodes on bottom LAN together with half-duplex CSMA links.");
// Multi-switch bottom LAN chain: b2-bs5-bs4-bs3-bs2-bs1-br
NetDeviceContainer link_b2_bs5 = csmaY.Install (NodeContainer (b2, bs5));
NetDeviceContainer link_bs5_bs4 = csmaX.Install (NodeContainer (bs5, bs4));
NetDeviceContainer link_bs4_bs3 = csmaY.Install (NodeContainer (bs4, bs3));
NetDeviceContainer link_bs3_bs2 = csmaX.Install (NodeContainer (bs3, bs2));
NetDeviceContainer link_bs2_bs1 = csmaY.Install (NodeContainer (bs2, bs1));
// Single-switch bottom LAN link: b3-bs1-br
NetDeviceContainer link_b3_bs1 = csmaY.Install (NodeContainer (b3, bs1));
// Common link for bottom LAN between bs1 and br (for b2 and b3 to get to br)
NetDeviceContainer link_br_bs1 = csmaX.Install (NodeContainer (br, bs1));
// ======================================================================
// Create a point-to-point link for connecting WAN nodes together
// (this type of link is full-duplex)
// ----------------------------------------------------------------------
NS_LOG_INFO ("L2: Create a " <<
p2pLinkDataRate << " " <<
p2pLinkDelay << " Point-to-Point link for the WAN.");
PointToPointHelper p2p;
p2p.SetDeviceAttribute ("DataRate", StringValue (p2pLinkDataRate));
p2p.SetChannelAttribute ("Delay", StringValue (p2pLinkDelay));
// ----------------------------------------------------------------------
// Now, connect top router to bottom router with a p2p WAN link
// ----------------------------------------------------------------------
NS_LOG_INFO ("L2: Connect the routers together with the Point-to-Point WAN link.");
NetDeviceContainer link_tr_br;
link_tr_br = p2p.Install (NodeContainer (tr,br));
// ======================================================================
// Manually create the list of NetDevices for each switch
// ----------------------------------------------------------------------
// Top Switch 4 NetDevices
NetDeviceContainer ts4nd;
ts4nd.Add (link_t2_ts4.Get (1));
ts4nd.Add (link_ts4_ts3.Get (0));
// Top Switch 3 NetDevices
NetDeviceContainer ts3nd;
ts3nd.Add (link_ts4_ts3.Get (1));
ts3nd.Add (link_ts3_ts2.Get (0));
// Top Switch 2 NetDevices
NetDeviceContainer ts2nd;
ts2nd.Add (link_ts3_ts2.Get (1));
ts2nd.Add (link_ts2_ts1.Get (0));
// Top Switch 1 NetDevices
NetDeviceContainer ts1nd;
ts1nd.Add (link_ts2_ts1.Get (1));
ts1nd.Add (link_t3_ts1.Get (1));
ts1nd.Add (link_tr_ts1.Get (1));
// Bottom Switch 1 NetDevices
NetDeviceContainer bs1nd;
bs1nd.Add (link_br_bs1.Get (1));
bs1nd.Add (link_bs2_bs1.Get (1));
bs1nd.Add (link_b3_bs1.Get (1));
// Bottom Switch 2 NetDevices
NetDeviceContainer bs2nd;
bs2nd.Add (link_bs2_bs1.Get (0));
bs2nd.Add (link_bs3_bs2.Get (1));
// Bottom Switch 3 NetDevices
NetDeviceContainer bs3nd;
bs3nd.Add (link_bs3_bs2.Get (0));
bs3nd.Add (link_bs4_bs3.Get (1));
// Bottom Switch 4 NetDevices
NetDeviceContainer bs4nd;
bs4nd.Add (link_bs4_bs3.Get (0));
bs4nd.Add (link_bs5_bs4.Get (1));
// Bottom Switch 5 NetDevices
NetDeviceContainer bs5nd;
bs5nd.Add (link_bs5_bs4.Get (0));
bs5nd.Add (link_b2_bs5.Get (1));
// ======================================================================
// Install bridging code on each switch
// ----------------------------------------------------------------------
BridgeHelper bridge;
bridge.Install (ts1, ts1nd);
bridge.Install (ts2, ts2nd);
bridge.Install (ts3, ts3nd);
bridge.Install (ts4, ts4nd);
bridge.Install (bs1, bs1nd);
bridge.Install (bs2, bs2nd);
bridge.Install (bs3, bs3nd);
bridge.Install (bs4, bs4nd);
bridge.Install (bs5, bs5nd);
// ======================================================================
// Install the L3 internet stack (TCP/IP)
// ----------------------------------------------------------------------
InternetStackHelper ns3IpStack;
// ----------------------------------------------------------------------
// Install the L3 internet stack on UDP endpoints
// ----------------------------------------------------------------------
NS_LOG_INFO ("L3: Install the ns3 IP stack on udp client and server nodes.");
NodeContainer endpointNodes (t2, t3, b2, b3);
ns3IpStack.Install (endpointNodes);
// ----------------------------------------------------------------------
// Install the L3 internet stack on routers.
// ----------------------------------------------------------------------
NS_LOG_INFO ("L3: Install the ns3 IP stack on routers.");
NodeContainer routerNodes (tr, br);
ns3IpStack.Install (routerNodes);
// ======================================================================
// Assign top LAN IP addresses
// ----------------------------------------------------------------------
NS_LOG_INFO ("L3: Assign top LAN IP Addresses.");
NetDeviceContainer topLanIpDevices; // - - - - - -- - - - - - -
topLanIpDevices.Add (link_tr_ts1.Get (0)); // NOTE: order matters here
topLanIpDevices.Add (link_t2_ts4.Get (0)); // for IP address
topLanIpDevices.Add (link_t3_ts1.Get (0)); // assignment
// - - - - - -- - - - - - -
Ipv4AddressHelper ipv4;
ipv4.SetBase ("192.168.1.0", "255.255.255.0");
ipv4.Assign (topLanIpDevices);
// ----------------------------------------------------------------------
// Assign bottom LAN IP addresses
// ----------------------------------------------------------------------
NS_LOG_INFO ("L3: Assign bottom LAN IP Addresses.");
NetDeviceContainer botLanIpDevices; // - - - - - -- - - - - - -
botLanIpDevices.Add (link_br_bs1.Get (0)); // NOTE: order matters here
botLanIpDevices.Add (link_b2_bs5.Get (0)); // for IP address
botLanIpDevices.Add (link_b3_bs1.Get (0)); // assignment
// - - - - - -- - - - - - -
ipv4.SetBase ("192.168.2.0", "255.255.255.0");
ipv4.Assign (botLanIpDevices);
// ----------------------------------------------------------------------
// Assign WAN IP addresses
// ----------------------------------------------------------------------
NS_LOG_INFO ("L3: Assign WAN IP Addresses.");
ipv4.SetBase ("76.1.1.0", "255.255.255.0");
ipv4.Assign (link_tr_br);
// ======================================================================
// Calculate and populate routing tables
// ----------------------------------------------------------------------
NS_LOG_INFO ("L3: Populate routing tables.");
Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
// ======================================================================
// Multi-Switch UDP traffic generation
// ----------------------------------------------------------------------
ApplicationContainer apps;
if (enableUdpMultiSW)
{
// ------------------------------------------------------------------
// Install multi-switch UDP echo server on b2
// ------------------------------------------------------------------
NS_LOG_INFO ("APP: Multi-Switch UDP server (on node b2 of bottom LAN)");
UdpEchoServerHelper server (udpEchoPort);
ApplicationContainer serverApp = server.Install (b2);
serverApp.Start (Seconds (0.5));
serverApp.Stop (Seconds (simDurationSeconds));
// ------------------------------------------------------------------
// Install multi-switch UDP echo client on t2
// ------------------------------------------------------------------
NS_LOG_INFO ("APP: Multi-Switch UDP client (on node t2 of top LAN)");
Time interPacketInterval = Seconds (0.005);
uint32_t packetSize = 1000;
uint32_t maxPacketCount = (simDurationSeconds - 2.0) / 0.005;
UdpEchoClientHelper client (Ipv4Address ("192.168.2.2"), udpEchoPort);
client.SetAttribute ("MaxPackets", UintegerValue (maxPacketCount));
client.SetAttribute ("Interval", TimeValue (interPacketInterval));
client.SetAttribute ("PacketSize", UintegerValue (packetSize));
ApplicationContainer clientApp = client.Install (t2);
clientApp.Start (Seconds (0.5));
clientApp.Stop (Seconds (simDurationSeconds));
}
// ======================================================================
// Single-Switch UDP traffic generation
// ----------------------------------------------------------------------
if (enableUdpSingleSW)
{
// ------------------------------------------------------------------
// Install single-switch UDP echo server on t3
// ------------------------------------------------------------------
NS_LOG_INFO ("APP: Single-Switch UDP server (on node t3 of top LAN)");
UdpEchoServerHelper server (udpEchoPort);
ApplicationContainer serverApp = server.Install (t3);
serverApp.Start (Seconds (0.5));
serverApp.Stop (Seconds (simDurationSeconds));
// ------------------------------------------------------------------
// Install single-switch UDP echo client on b3
// ------------------------------------------------------------------
NS_LOG_INFO ("APP: Single-Switch UDP client (on node b3 bottom LAN)");
Time interPacketInterval = Seconds (0.005);
uint32_t packetSize = 1000;
uint32_t maxPacketCount = (simDurationSeconds - 2.0) / 0.005;
UdpEchoClientHelper client (Ipv4Address ("192.168.1.3"), udpEchoPort);
client.SetAttribute ("MaxPackets", UintegerValue (maxPacketCount));
client.SetAttribute ("Interval", TimeValue (interPacketInterval));
client.SetAttribute ("PacketSize", UintegerValue (packetSize));
ApplicationContainer clientApp = client.Install (b3);
clientApp.Start (Seconds (0.5));
clientApp.Stop (Seconds (simDurationSeconds));
}
// ======================================================================
// Print routing tables at T=0.1
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// NOTE: Node 0 and Node 13 must have non-empty tables (except for local
// loopback and local LAN) if routing is operating correctly.
// ----------------------------------------------------------------------
NS_LOG_INFO ("Set up to print routing tables at T=0.1s");
Ptr<OutputStreamWrapper> routingStream =
Create<OutputStreamWrapper> ("global-routing-multi-switch-plus-router.routes", std::ios::out);
Ipv4GlobalRoutingHelper g;
g.PrintRoutingTableAllAt (Seconds (0.1), routingStream);
// ======================================================================
// Configure PCAP traces
// ----------------------------------------------------------------------
NS_LOG_INFO ("Configure PCAP Tracing (if any configured).");
// - - - - - - - - - - - - - -
// multi-switch UDP echo client
// - - - - - - - - - - - - - -
if (vssearch ("t2",pcapLocationVec))
{
csmaX.EnablePcap ("t2.pcap", topLanIpDevices.Get (1), true, true);
}
// - - - - - - - - - - - - - -
// multi-switch UDP echo server
// - - - - - - - - - - - - - -
if (vssearch ("b2",pcapLocationVec))
{
csmaY.EnablePcap ("b2.pcap", botLanIpDevices.Get (1), true, true);
}
// - - - - - - - - - - - - - -
// single-switch UDP echo client
// - - - - - - - - - - - - - -
if (vssearch ("b3",pcapLocationVec))
{
csmaY.EnablePcap ("b3.pcap", botLanIpDevices.Get (2), true, true);
}
// - - - - - - - - - - - - - -
// single-switch UDP echo server
// - - - - - - - - - - - - - -
if (vssearch ("t3",pcapLocationVec))
{
csmaX.EnablePcap ("t3.pcap", topLanIpDevices.Get (2), true, true);
}
// - - - - - - - - - - - - - -
// top router, LAN side
// - - - - - - - - - - - - - -
if (vssearch ("trlan",pcapLocationVec))
{
csmaY.EnablePcap ("trlan.pcap", topLanIpDevices.Get (0), true, true);
}
// - - - - - - - - - - - - - -
// bottom router, LAN side
// - - - - - - - - - - - - - -
if (vssearch ("brlan",pcapLocationVec))
{
csmaX.EnablePcap ("brlan.pcap", botLanIpDevices.Get (0), true, true);
}
// - - - - - - - - - - - - - -
// top router, WAN side
// - - - - - - - - - - - - - -
if (vssearch ("trwan",pcapLocationVec))
{
p2p.EnablePcap ("trwan.pcap", link_tr_br.Get (0), true, true);
}
// - - - - - - - - - - - - - -
// bottom router, WAN side
// - - - - - - - - - - - - - -
if (vssearch ("brwan",pcapLocationVec))
{
p2p.EnablePcap ("brwan.pcap", link_tr_br.Get (1), true, true);
}
// ======================================================================
// Now, do the actual simulation.
// ----------------------------------------------------------------------
NS_LOG_INFO ("Run Simulation for " << simDurationSeconds << " seconds.");
Simulator::Stop (Seconds (simDurationSeconds));
Simulator::Run ();
Simulator::Destroy ();
NS_LOG_INFO ("Done.");
}
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