Simple iperf is not working

[Esteban . Coma]

Hello everyone, I have this problem regarding a simple ns3 script trying to emulate a simple 6 node topology, with 3 different networks.

Basically it is an iperf client in node 0 trying to connect to a server in node 5.

I've trying to check which differences between my script and the ones from the examples (dce-iperf.cc and dce-iperf-multi.cc) and cannot

find where I'm failing.

I attach the script and a simple bash script to print the output of a node in a pretty way in case someone wants it. The script does not fail

but in the iperf client node (node-0) when iperf is executed does not provide any output, neither in stdout nor stderr. The iperf server is apparently

well initialized. 

Anyway, I'm completely lost at this point, I've tried to print the routes in case I was doing something wrong, but I can't see where I'm failing.

Thank you in advance.

Esteban.

[Hajime Tazaki]

sorry to be late.

the following patch your issue, which means LinuxStackHelper
with Ipv4AddressHelper::Assign() has some bug (in DCE side).

the order matters: it's annoying...
i will look at the issue and hopefully fix it soon.

--- pfctest3.cc.orig 2015-03-12 15:20:40.314630601 +0900
+++ pfctest3.cc 2015-02-15 04:40:58.679518132 +0900
@@ -103,15 +103,15 @@
//Assigns IP addresses to the three different networks.
Ipv4AddressHelper address;

- address.SetBase("192.168.1.0", "255.255.255.0");
- Ipv4InterfaceContainer centralInterfaces = address.Assign (centralDevices);
-
address.SetBase("192.168.2.0", "255.255.255.0");
Ipv4InterfaceContainer leftInterfaces = address.Assign (leftDevices);

address.SetBase("192.168.3.0", "255.255.255.0");
Ipv4InterfaceContainer rightInterfaces = address.Assign (rightDevices);

+ address.SetBase("192.168.1.0", "255.255.255.0");
+ Ipv4InterfaceContainer centralInterfaces = address.Assign (centralDevices);
+




-- Hajime

At Sat, 14 Feb 2015 09:09:57 -0800 (PST),
Esteban . Coma wrote:
>
> [1 <multipart/alternative (7bit)>]
> [1.1 <text/plain; UTF-8 (7bit)>]

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> [1.2 <text/html; UTF-8 (quoted-printable)>]
>
> [2 printnode.sh <text/x-sh; US-ASCII (7bit)>]
> #!/bin/bash
>
> RED='\033[1;31m'
> GREEN='\033[1;32m'
> YELLOW='\033[1;33m'
> PURPLE='\033[1;35m'
> NC='\033[0m' # No Color
> SLASH="/"
> AUX=var/log/
> LC=${1: -1}
>
> if [ "$#" -ne 1 ]; then
> echo "Usage: $ ./printnode.sh <files-X>"
> exit -1
> fi
>
>
> if [ $LC == $SLASH ];
> then
> DIR=$1$AUX
> else
> DIR=$1$SLASH$AUX
> fi
>
> NODENUM=$(echo $DIR | head -c 7 | tail -c 1)
>
> echo -e "${RED}NODE: ${GREEN}$NODENUM ${NC}"
>
> for file in `ls $DIR`
> do
> #Get first char of string
> PL=$(expr substr $file 1 1)
> #Check if it is a number
> case $PL in [0-9]* )
> echo -e " ${YELLOW}$file/${NC}"
> for fich in `ls $DIR$file/`
> do
> case $fich in
> "cmdline")
> echo -n -e " ${PURPLE}CMDLINE: ${NC}"
> cat $DIR$file$SLASH$fich
> ;;
> "status")
> echo -e " ${PURPLE}STATUS: ${NC}"
> cat $DIR$file$SLASH$fich
> ;;
> "stderr")
> if [ -s $DIR$file$SLASH$fich ];
> then
> echo -n -e " ${PURPLE}STDERR: ${NC}"
> cat $DIR$file$SLASH$fich
> else
> echo -e " ${PURPLE}STDERR: ${NC}"
> fi
> ;;
> "stdout")
> echo -e " ${PURPLE}STDOUT: ${NC}"
> cat $DIR$file$SLASH$fich | awk '{print "\t" $0}'
> ;;
> esac
> done
> #Prints a line through the whole screen
> #Change the 1;31 for:
> # 31 -> red
> # 32 -> green
> # 34 -> blue
> printf '\e[1;31m%*s\n\e[0m' "${COLUMNS:-$(tput cols)}" '' | tr ' ' -
> ;;
> esac
> done
> [3 pfctest3.cc <text/x-c++src; US-ASCII (7bit)>]
> #include "ns3/network-module.h"
> #include "ns3/core-module.h"
> #include "ns3/internet-module.h"
> #include "ns3/dce-module.h"
> #include "ns3/applications-module.h"
> #include "ns3/csma-module.h"
> #include <fstream>
>
> //Intended Topology:
> //Extendible.
> //CSMA nodes (Ethernet-like network but without Collision Detection)
> // DataRate = 10 Mpbs
> // Delay = 0.2-0.3 ms
> //
> // 192.168.2.0 n1 n4 192.168.3.0
> // | 192.168.1.0 |
> //variable |--- n0 ------ n3 ---| variable
> // | |
> // n2 n5
>
> #define DEBUG 1
>
> using namespace ns3;
> using namespace std;
>
> NS_LOG_COMPONENT_DEFINE ("pfctest3");
>
>
> /*
> static std::vector<std::string> NodeIp(Ptr<Node> node)
> {
> std::vector<std::string> addresses;
> int nDevices = node->GetNDevices();
> Ptr<Ipv4> ipv4 = node->GetObject<Ipv4> (); // Get Ipv4 instance of the node
> for (int i=0; i<nDevices; i++){
> Ipv4Address addr = ipv4->GetAddress (i, 0).GetLocal (); // Get Ipv4InterfaceAddress of xth interface.
> addresses.push_back(addr);
> }
> }
> */
> std::string Ipv4AddressToString (Ipv4Address ad)
> {
> std::ostringstream oss;
> ad.Print (oss);
> return oss.str ();
> }
>
>
> int main (int argc, char *argv[])
> {
> CommandLine cmd;
> cmd.Parse (argc, argv);
>
> int totalNodes = 6; //left+right+central
>
> if (totalNodes > 30){
> NS_LOG_ERROR ("ERROR: In this topology there can't be more than 30 nodes");
> exit(-1);
> }
>
> //Creates all the nodes together.
> NodeContainer nodes;
> nodes.Create (totalNodes);
>
> NodeContainer leftNodes;
> leftNodes.Add(nodes.Get(0));
> leftNodes.Add(nodes.Get(1));
> leftNodes.Add(nodes.Get(2)); //So it belongs to both .1 and .2 networks.
>
> NodeContainer centralNodes = NodeContainer (nodes.Get(2), nodes.Get(3));
>
> NodeContainer rightNodes;
> rightNodes.Add(nodes.Get(3)); //So it belongs to both .1 and .3 networks.
> rightNodes.Add(nodes.Get(4)); //So it belongs to both .1 and .3 networks.
> rightNodes.Add(nodes.Get(5)); //So it belongs to both .1 and .3 networks.
>
>
> //Installs the linux kernel in all nodes.
> DceManagerHelper dceManager;
> dceManager.SetNetworkStack ("ns3::LinuxSocketFdFactory", "Library", StringValue ("liblinux.so"));
> dceManager.Install (nodes);
>
> LinuxStackHelper stack;
> stack.Install (nodes);
>
> //Create the fast CSMA (100Mbit/s channel) and assign the nodes to it.
> CsmaHelper csmaFast;
> csmaFast.SetChannelAttribute ("DataRate", StringValue("100Mbps"));
> csmaFast.SetChannelAttribute ("Delay", StringValue("2ms"));
>
> NetDeviceContainer leftDevices = csmaFast.Install(leftNodes);
> NetDeviceContainer rightDevices = csmaFast.Install(rightNodes);
>
> //Create the slow CSMA (10Mbit/s channel) and assign the nodes.
> CsmaHelper csmaSlow;
> csmaSlow.SetChannelAttribute ("DataRate", StringValue("10Mbps"));
> csmaSlow.SetChannelAttribute ("Delay", StringValue("2ms"));
> //Same Delay value.
>
> NetDeviceContainer centralDevices = csmaSlow.Install(centralNodes);
>
>
> //Assigns IP addresses to the three different networks.
> Ipv4AddressHelper address;
>
> address.SetBase("192.168.1.0", "255.255.255.0");
> Ipv4InterfaceContainer centralInterfaces = address.Assign (centralDevices);
>
> address.SetBase("192.168.2.0", "255.255.255.0");
> Ipv4InterfaceContainer leftInterfaces = address.Assign (leftDevices);
>
> address.SetBase("192.168.3.0", "255.255.255.0");
> Ipv4InterfaceContainer rightInterfaces = address.Assign (rightDevices);
>
> //Populate routing tables.
> Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
> LinuxStackHelper::PopulateRoutingTables ();
>
>
> #if DEBUG
> DceApplicationHelper dce;
> ApplicationContainer apps;
>
> dce.SetStackSize (1 << 20);
>
> Ptr<Node> node = nodes.Get (5); // Get pointer to the node in container
> Ptr<Ipv4> ipv4 = node->GetObject<Ipv4> (); // Get Ipv4 instance of the node
> Ipv4Address addr = ipv4->GetAddress (0, 0).GetLocal (); // Get Ipv4InterfaceAddress of xth interface.
> string str = Ipv4AddressToString (addr);
>
>
> // Launch iperf client on node 0
> dce.SetBinary ("iperf");
> dce.ResetArguments ();
> dce.ResetEnvironment ();
> dce.AddArgument ("-c");
> dce.AddArgument (str);
> dce.AddArgument ("-i");
> dce.AddArgument ("1");
> dce.AddArgument ("--time");
> dce.AddArgument ("10");
>
> apps = dce.Install (nodes.Get (0));
> apps.Start (Seconds (0.7));
> apps.Stop (Seconds (20));
>
> // Launch iperf server on node 1
> dce.SetBinary ("iperf");
> dce.ResetArguments ();
> dce.ResetEnvironment ();
> dce.AddArgument ("-s");
> dce.AddArgument ("-P");
> dce.AddArgument ("1");
>
> apps = dce.Install (nodes.Get (5));
>
> apps.Start (Seconds (0.6));
> #else
> std::cout << "TODO THIS STUFFZ" << "\n";
> #endif
>
> csmaFast.EnablePcapAll ("csmaFast-iperf");
> csmaSlow.EnablePcapAll ("csmaSlow-iperf");
>
> Simulator::Stop (Seconds (40.0));
> Simulator::Run ();
> Simulator::Destroy ();
>
> return 0;
> }