Hey,
I am working on Ubuntu and with NS2.31.
I am trying to emulate a wireless mesh network in NS2. I have written a UDP
client socket program to generate UDP traffic. Presently, to start with I am
trying to run my UDP socket code and my NS2 code on the same machine. If
this works, I will be running the UDP socket code on another machine and try
to accept traffic from there.
But right now, I am unable to see the emulation results. I do not get any
errors, but my terminal is blank, so is my trace file. Following is the code
that I have used:
set ns [new Simulator]
$ns use-scheduler RealTime
set file1 [open output_gentra.tr w]
$ns trace-all $file1
set file2 [open output_gentra.nam w]
$ns namtrace-all $file2
puts "Starting..........."
proc finish {} {
global ns
global file1
global file2
$ns flush-trace
close $file1
close $file2
$ns close channel
#exec nam output.nam &
exit 0
}
set node0 [$ns node]
set node1 [$ns node]
set node2 [$ns node]
set ipnetIN [new Network/IP/UDP]
$ipnetIN open readonly
$ipnetIN bind 127.0.0.1 1234
set aIn [new Agent/Tap]
$aIn network $ipnetIN
set ipnetOUT [new Network/IP/UDP]
$ipnetOUT open writeonly
$ipnetOUT connect 127.0.0.1 1235
set aOut [new Agent/Tap]
$aOut network $ipnetOUT
$ns duplex-link $node0 $node1 30kb 5ms DropTail
$ns duplex-link $node1 $node2 0.1kb 5ms DropTail
$ns queue-limit $node1 $node2 10
$ns attach-agent $node0 $aIn
$ns attach-agent $node2 $aOut
$ns connect $aIn $aOut
puts "Starting..........."
$ns run
and my UDP client socket program is as follows:
import java.net.*;
import java.lang.*;
import java.io.*;
public class ClientUDP
{
static Thread t;
public static class SimpleClient implements Runnable{
DatagramSocket socket;
DatagramPacket packet;
InetAddress address;
//byte[] message = new byte[256];
int port = 1234;
String s = "hdhasgdhasgd";
byte[] b = s.getBytes();
public SimpleClient(){
try{
socket = new DatagramSocket();
address = InetAddress.getByName("Sam");
packet = new DatagramPacket(b, b.length,
address, port);
}catch(Exception e){}
}
//
// Send empty request
//
public void run(){
try{
for(int i=0; i<10000; i++){
socket.send(packet);
t.sleep(1000);
}
}catch(Exception e){}
}
}
public static void main(String[] args)
throws Exception
{
try{
t = new Thread(new SimpleClient());
t.start();
}catch(Exception e){}
//
// Receive reply and print
//
/*packet = new DatagramPacket(message,
message.length);
socket.receive(packet);
String received = new String(packet.getData(), 0);
System.out.println("Received: " + received);
socket.close();*/
}
}
Could somebody please tell me what is happening??
Sam
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