Re: [ns] new class

[Teerawat Issariyakul]

Hi

If you would like to add a new module into NS2, please read

http://www.ns2ultimate.com/post/454001969/including-new-modules-into-ns-2

I hope this will help.

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear

On 12/3/2010, Ali Al-Shra'ah. alihussein2...@yahoo.com wrote:


hi ,

I have a new class and put it in the /ns-2.29/tora folder
and on the terminal I have implemented the following commands:
cd ns-allinone-2.29
cd ns-2.29
make clean
make
make install

but there is no object files for this class have appeared
please, if any one knows why reply me soon.

regards

Re: [ns] what does it means ???

[Teerawat Issariyakul]

Hi,

The no-slot error occurs since you did not configure the classifier
properly. In particular, you ask NS2 to send a packet to a non-existing
object.

For more information, please read the following post:

http://www.ns2ultimate.com/post/520626807/classifier-no-slot-error

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat





On 12/12/2010, El hadi Cherkaoui e_cherka...@yahoo.fr wrote:


Dear all ,

Please ca n someone explain me this error in NS2

-- Classfier::no-slot{} default handler (tcl/lib/ns-lib.tcl) ---
    _o270: no target for slot 3
    _o270 type: Classifier/Addr
content dump:
classifier _o270
    0 offset
    22 shift
    1023 mask
    1 slots
        slot 5: _o271 (Classifier/Addr)
-- Finished standard no-slot{} default handler --


I can't find the object _o270 and _o271 so i can't understand where is the 
fault ???

I noted that I receive this error only when i have more then 2 mobile nodes.

Best regards

El hadi 




  

Re: [ns] Classifying Packets

[Teerawat Issariyakul]

Hi Rob,

You can use packet classifiers in NS2. Please go through the following
slides for the details.

http://www.ns2ultimate.com/post/513029699/classifiers-a-multi-target-packet-forwarder

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear

On 9/16/2010, Rob robert.c.gr...@gmail.com wrote:


Hello All,

For part of my research I need to implement Packet Classification in NS2. I
was wondering, where is the best place to insert classification? It seems to
me this could be done in a Queue or Classifier. Any thoughts?

Thanks.

--
Robert C. Green II
(412) 860-4825

http://www.parallelcoding.com

[ns] Has function Tcl::error(...) been changed to be a private function?

[Teerawat Issariyakul]

Hello all,

I just found out that NS 2.35 has moved the following function

Tcl::error(const char* s);

as a private member function of class Tcl.

This means we cannot exit from the simulation in a uniform way as
indicated in the NS documentation.

I would like to confirm my understanding, before publishing it online.

Any comment would be appreciated.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat

Re: [ns] new block in simplelink structure?

[Teerawat Issariyakul]

Hi Pedro,

Did you bind the C++ class to the OTcl class? Please read the following
blog post to see how to bind C++ classes:

http://www.ns2ultimate.com/post/689847378/c-and-otcl-linkage-binding-c-and-otcl-classes

and

http://www.ns2ultimate.com/post/720424694/c-and-otcl-linkage-binding-c-and-otcl-classes

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear




On 8/24/2010, pedro chaparro pdr...@gmail.com wrote:

*hi guys, i'm implementing a new block to insert into the SimpleLink
strucutre , * between queue_ and link_. blocks, i create a new class call
SKlink from class connector, it is simple i just wanna use the recv function
to for now just print a message each time a packet is transmitted over the
link. i achieve to compile everythink ok , but when i run my tcl script (at
the end of this page) , i got and error i show below. i following the 14.1
section  of  Teerawat Issariyakul book, i suppose i'm missing something,
i'll appreciate a lot any help.
thabks
*
skmod.cc*

#include skmod.h
void SKHandler::handle(Event*){}
SKlink::SKlink() : skh_(*this)
{
pkt_=0;
qh_=0;


};

void SKlink::recv(Packet* p, Handler* h)
{

printf(inside recv SK function \n);
send(p,skh_);

}

*skmod.h*
#include connector.h
#include random.h
#include timer-handler.h
#include ranvar.h

class SKlink;

class SKHandler : public Handler {
public:
SKHandler(SKlink sk) : sk_link_(sk) {}
   void handle(Event*);
private:
SKlink sk_link_;
};

class SKlink : public Connector {
  public:
SKlink();
 //int command(int argc, const char*const* argv);
 void recv(Packet* p, Handler* h);


  protected:
SKHandler skh_;
Packet* pkt_;
Handler* qh_;
};
*
ns-link.tcl*
SimpleLink instproc link-skt {} {
$self instvar link_ queue_ drophead_
$self instvar SKlk_
set SKlk_ [new SKlink]
queue_ target $SKlk_
$SKlk_ target $link_
$SKlk_ drop-target $drophead_
}

*ns-lib.tcl*
Simulator instproc link-skt {from to} {
set link [$self link $from $to]
$link link-skt
}
-- 

*Error i get*

r...@hobbes:/home/pdro7/Desktop/nsCOSIM/ns-2.34# ./ns testTCP.tcl
invalid command name SKlink
while executing
SKlink create _o38 
invoked from within
catch $className create $o $args msg
invoked from within
if [catch $className create $o $args msg] {
if [string match __FAILED_SHADOW_OBJECT_ $msg] {
delete $o
return 
}
global errorInfo
error class $...
(procedure new line 3)
invoked from within
new SKlink
(procedure _o29 line 4)
(SimpleLink link-skt line 4)
invoked from within
$link link-skt
(procedure _o3 line 3)
(Simulator link-skt line 3)
invoked from within
$ns link-skt $n0 $n1
(file testTCP.tcl line 41)


Scrip Tlc

# This script is created by NSG2 beta1
# http://wushoupong.googlepages.com/nsg

#===
# Simulation parameters setup
#===
set val(stop)   13.0 ;# time of simulation end

#===
#Initialization
#===
#Create a ns simulator
set ns [new Simulator]

#Open the NS trace file
set tracefile [open out.tr w]
$ns trace-all $tracefile

#Open the NAM trace file
set namfile [open out.nam w]
$ns namtrace-all $namfile

#===
#Nodes Definition
#===
#Create 2 nodes
set n0 [$ns node]
set n1 [$ns node]

set n2 [$ns node]
set n3 [$ns node]
set n4 [$ns node]
set n5 [$ns node]

#===
#Links Definition
#===
#Createlinks between nodes
$ns simplex-link $n0 $n1 1000.0Mb 0.1ms DropTail
$ns queue-limit $n0 $n1 50
*$ns link-skt $n0 $n1*
$ns simplex-link $n2 $n0 1000.0Mb 0.1ms DropTail
$ns queue-limit $n2 $n0 50

$ns simplex-link $n1 $n3 1000.0Mb 0.1ms DropTail
$ns queue-limit $n1 $n3 50


$ns simplex-link $n4 $n0 1000.0Mb 0.1ms DropTail
$ns queue-limit $n4 $n0 50

$ns simplex-link $n1 $n5 1000.0Mb 0.1ms DropTail
$ns queue-limit $n1 $n5 50
#Give node position (for NAM)
#$ns duplex-link-op $n0 $n1 orient right

#===
#Agents Definition
#===
#Setup a TCP connection
set tcp0 [new Agent/UDP]
$ns attach-agent $n2 $tcp0
set sink1 [new Agent/Null]
$ns attach-agent $n3 $sink1
$ns connect $tcp0 $sink1
$tcp0 set packetSize_ 1500


set tcp1 [new Agent/UDP]
$ns attach-agent $n4 $tcp1
set sink2 [new Agent/Null]
$ns attach-agent $n5 $sink2
$ns connect $tcp1 $sink2
$tcp1 set packetSize_ 1500

#===
#Applications Definition
#===
#Setup a CBR Application over TCP connection
set cbr0 [new Application/Traffic/CBR]
$cbr0 attach-agent $tcp0
$cbr0 set packetSize_ 1000
$cbr0 set rate_ 1.0Mb
$cbr0 set

Re: [ns] Test cwnd size for TCP variants

[Teerawat Issariyakul]

Hi,

Here is the code for recursively showing the value of the instvar cwnd_
of TCP for every 0.5s.

$ns at 1.5 show_tcp_seqno

proc show_tcp_seqno {} {
global tcp ns
puts TCP CWND is [$tcp set cwnd_]
$ns at [expr [ $ns now ] + 0.5]  show_tcp_seqno
}

Feel free to adjust it yourself.


Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat


On 8/15/2010, Ghassan Akrem ghassanak...@yahoo.com wrote:


Hi all,
 
I try to test cwnd size for variant TCP,by using ns-2 simulation, in fact I 
want to test the performance of TCP throughputs of ordinary  TCP and some 
other TCP's by monitoring cwnd size for each variant.
 
I hope to get some script, TCL source code perform this test.
 
Regards 


  

Re: [ns] Error: no-slot{} default handler

[Teerawat Issariyakul]

Hi Sajad ,

The no-slot error occurs since you did not configure the classifier
properly. In particular, you ask NS2 to send a packet to a non-existing
object.

For more information, please read the following post:

http://www.ns2ultimate.com/post/520626807/classifier-no-slot-error

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat





On 8/12/2010, sajad m sajadm1...@yahoo.com wrote:


I'm trying to test my new routing by running a tcl script but it shows this 
error:


channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
highestAntennaZ_ = 1.5,  distCST_ = 550.0
SORTING LISTS ...DONE!
--- Classfier::no-slot{} default handler (tcl/lib/ns-lib.tcl) ---
    _o26: no target for slot 0
    _o26 type: Classifier/Port
content dump:
classifier _o26
    0 offset
    0 shift
    2147483647 mask
    1 slots
        slot 255: _o28 (CMUTrace/Recv)
-- Finished standard no-slot{} default handler --

***

Can anyone help me?

Regards 
Sajad m




  

Re: [ns] how to install ns 2.26

[Teerawat Issariyakul]

Hi
Hi Mobi,

I did some test on NS2 installation few months ago. Here is the result

http://www.ns2ultimate.com/post/439346614/working-combination-ns-2-34-ubuntu-8-04-and-perhaps

There is a problem with the current linux-like distribution. Here is the
solution

http://www.ns2ultimate.com/post/441093095/ns-2-35-works-on-cygwin

I hope this will help.

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear

On 7/30/2010, mobi faizy faizyt...@gmail.com wrote:


any boy has idea how to install Ns 2.26 on ubuntu or cygwin.
I try but got error fromm gcc compiler.
tell me how can i install gcc-3.2.2 on ubuntu 9.10 karmic.

Regards.

Re: [ns] linkage Otcl/C++

[Teerawat Issariyakul]

Hi,

If you would like to see how to invoke C++ function from the OTcl domain.
Please visit the following website.

http://www.ns2ultimate.com/post/801303612/c-and-otcl-linkage-otcl-commands-getting-started

The second part of OTcl command will be up next week. Please stay tune!


Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat


On 7/8/2010, hend baklouti hend.baklo...@gmail.com wrote:


hello,
i'm a beginner in ns2 and i have a function void monitor(void) that i want
to call it from the tcl script.
Can any one help me ?
thank you

Re: [ns] Fw: Re: Error 127

[Teerawat Issariyakul]

Hi

I did some test on NS2 installation few months ago. Here is the result

http://www.ns2ultimate.com/post/439346614/working-combination-ns-2-34-ubuntu-8-04-and-perhaps

There is a problem with the current linux-like distribution. Here is the
solution

http://www.ns2ultimate.com/post/441093095/ns-2-35-works-on-cygwin

I hope this will help.

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear

On 7/11/2010, ikenna ajere ajer...@yahoo.co.uk wrote:


Hello Mike,

Thanks for your response. I actually installed ns 2.34 on Ubuntu 9.10 using 
the ppa package by wouter. I did not use the ns allinone package. What happens 
is that I can run cbrgen and it generates a traffic file but running setdest 
always gives the error: bash: ./setdest: No such file or directory. That was 
the genesis of the problem. I have tried all the things I listed in the mail 
below but it still does not work.Actually confused and dont know what to do 
next as I have not even started the main thought process for my thesis which 
is due early next month.

Pls I need ur advice. I paid soo muuch (through my nose) for this masters and 
failure is not an option.

Thanks as I wait for your replies.

Pls all ns users, help me out. I know there is a soln, I know some1 has 
encountered it b4, I know there's a soln. Pls can some1 render a positive 
help. I'm ready to call u if u give me ur no.

Thanks


 me fany replies from anybody on the request belowr,
 It's urgent pls.

 Thanks

 --- On Wed, 7/7/10, ikenna ajere ajer...@yahoo.co.uk wrote:

 From: ikenna ajere ajer...@yahoo.co.uk
 Subject: [ns] Fw: Re:  Error 127
 To: rudraks...@gmail.com
 Cc: ns-users@ISI.EDU
 Date: Wednesday, 7 July, 2010, 0:38




 --- On Tue, 6/7/10, ikenna ajere ajer...@yahoo.co.uk wrote:
 Hello,

 Pls can anybdy help me? Still encountering the error below,
 Pls it's very urgent
 Thanks
 From: ikenna ajere ajer...@yahoo.co.uk
 Subject: Re: [ns] Error 127
 To: rudraksh shrivastava rudraks...@gmail.com
 Date: Tuesday, 6 July, 2010, 23:22

 Hello,

 I installed the g++ compiler bt I got another error msg;

 g++ -c -Dstand_alone -dstl_namespa...@stl_namespace@   
 -DCPP_NAMESPACE=std -I../../.. -o rng.o ../../../tools/rng.cc
 g++: ../../../tools/rng.cc: No such file or directory
 g++: no input files
 make: *** [rng.o] Error 1

 How do I resolve this.

 Pls I need ur urgent help

 Thanks


 --- On Tue, 6/7/10, rudraksh shrivastava rudraks...@gmail.com wrote:

 From: rudraksh shrivastava rudraks...@gmail.com
 Subject: Re: [ns] Error 127
 To: ikenna ajere ajer...@yahoo.co.uk
 Date: Tuesday, 6 July, 2010, 14:31

 apt-get install g++ run this...

 On Wed, Jul 7, 2010
  at 1:00 AM, rudraksh shrivastava rudraks...@gmail.com wrote:

 Hii

 U have to install g++ compiler on ur pc...which OS are u using ??

 On Wed, Jul 7, 2010 at 12:34 AM, ikenna ajere ajer...@yahoo.co.uk wrote:




 Hello,



 Encountered this error while trying to run ''make'' on setdest directory



 make: g++: command not found

 make: *** [setdest] Error 127



 I have not been able to run setdest as it keeps on returning an   
 invalid command. Pls I need an urgent help. i am using ubuntu 9.10



 Ajere


















      


      











  

Re: [ns] monitor-queue activation problem

[Teerawat Issariyakul]

Hi Ahmed,

From what I see, the error is caused by

$link_([$n1 id]:[$n2 id])

I think there is no link connecting nodes $n0 and $n1. You are asking NS2
to monitor the link which does not exist.

Make sure that there is a link connecting $n0 and $n1 BEFORE invoking
monitor-queue.


If you would like to learn how to read OTcl error message, please read

http://www.ns2ultimate.com/post/419191200/tcl-error-message-in-ns2

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat





On 7/9/2010, Ahmed Hesham ahes...@live.com wrote:













  Dear All

I am having this error while trying to run monitor-queue



can't read link_(5:6): no such variable
while executing
$link_([$n1 id]:[$n2 id]) init-monitor $self $qtrace $sampleInterval
(procedure _o3 line 3)
(Simulator monitor-queue line 3)
invoked from within
$ns_ monitor-queue $n0 $n1 stdout
invoked from within
set qmon [$ns_ monitor-queue $n0 $n1 stdout]
(file ranWless.tcl line 165)

this tcl script is

set queue [open queue w]
set qmon [$ns_ monitor-queue $n0 $n1 stdout];
[$ns_ link $n0 $n1] queue-sample-timeout;
proc queueLength {} {
global ns_ qmon queue
set time 0.05
set length [$qmon set pkts_]
set now [$ns_ now]
puts $queue $now $length
$ns_ at [expr $now+$time] queueLength
}
$ns_ at 0.0 queueLength

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Hotmail: Powerful Free email with security by Microsoft.
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Re: [ns] target on tcp implementation

[Teerawat Issariyakul]

Hi Pedro,

TcpAgent uses function

send(p,h)

from within function TCPAgent::output(int seqno, int reason)

rather than target_- recv(p,h)

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat






On 6/29/2010, pedro chaparro pdr...@gmail.com wrote:


hi everyone,  i wonder my self why there is not a call to the target
(target_-recv(p);) on the tcp implementation of tcp (tcp.cc) as there is in
udp.cc ??
thanks


-- 
Pedro Alonso Chaparro Valero RD Engineer
Ciudad Politecnica de la Innovación
iTEAM - Mobile Communications Group
Polytechnic University of Valencia
C\ Camino de Vera S/N, Edificio 8G
46022 Valencia, Spain

Re: [ns] the recv() in routing protocol process one packet at a time or multiple?

[Teerawat Issariyakul]

Hi,

NS2 is a single-thread program. It processes one thing at the time. This
is also true for function recv() which process one packet at a time.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat




On 6/10/2010, tiongsquare tiongsqu...@hotmail.com wrote:



the recv() does it process one packet at a time and the rest queuing up
outside? or at one time multiple packets can access the recv()? hope someone
can clear my doubts, thanks!
--
View this message in context: 
http://old.nabble.com/the-recv%28%29-in-routing-protocol-process-one-packet-at-a-time-or-multiple--tp28844205p28844205.html
Sent from the ns-users mailing list archive at Nabble.com.

Re: [ns] what is this error?

[Teerawat Issariyakul]

Hi Pedro,

Perhaps, you might want to read the following post about no-slot error:

http://www.ns2ultimate.com/post/520626807/classifier-no-slot-error

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat




On 5/5/2010, pedro chaparro pdr...@gmail.com wrote:


hi, i'm using  a tcl proc where i received two parameters, inside the proc
tcl file i wanna start a cbr traffic source, i can define it without
problems, but when i included the lines to start it and stop it, i get this
lines below. i think is something related with scheduler, im not really
sure. if anyone knows hot to resolve this problem, i'll appreciate a lot you
help


--- Classfier::no-slot{} default handler (tcl/lib/ns-lib.tcl) ---
_o74: no target for slot 1023
_o74 type: Classifier/Addr
content dump:
classifier _o74
0 offset
22 shift
1023 mask
1 slots
slot 1: _o75 (Classifier/Addr)
-- Finished standard no-slot{} default handler --

-- 
Ing Pedro Alonso Chaparro Valero
Ciudad Politecnica de la Innovación
iTEAM - Mobile Communications Group
Polytechnic University of Valencia
C\ Camino de Vera S/N, Edificio 8G
46022 Valencia, Spain

Re: [ns] seeds in ns

[Teerawat Issariyakul]

Hi Manoj,

You might want to read the following blog post. I just put it up today.

http://www.ns2ultimate.com/post/550010284/introducing-randomness-into-ns2

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat





On 4/23/2010, Manoj srivatsav manoj.srivat...@gmail.com wrote:


Hi all,
Can anyone tell me how the seed in the random number generator work
internally.. i.e i want to know the internal working for seeds in random
generator..?

Re: [ns] ns use-newtrace question about new trace format

[Teerawat Issariyakul]

Hi Jin,

Maybe you want to check out this page

http://nsnam.isi.edu/nsnam/index.php/NS-2_Trace_Formats


Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat


On 4/14/2010, Jin Woo Kim kimj...@iit.edu wrote:


In ns2 manual, page 158, it mentioned use-newtrace format. Is it available 
also to 802.15.4?
I simulated 802.15.4 with error model using new trace format (use-newtrace 
format)
Is it also availalbe trace format to 802.15.4?

Re: [ns] Installing problem

[Teerawat Issariyakul]

Hi Umang

I did some test on NS2 installation few weeks ago. Here is the result

http://www.ns2ultimate.com/post/439346614/working-combination-ns-2-34-ubuntu-8-04-and-perhaps

There is a problem with the current linux-like distribution. Here is the
solution

http://www.ns2ultimate.com/post/441093095/ns-2-35-works-on-cygwin

I hope this will help.

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear

On 4/15/2010, umang joshi umang_...@yahoo.com wrote:


Sir,

I have problem with installing ns-allinone-2.34 on ubuntu-10.04. my error code 
is copied below. anybody can help me?




/home/dhananjay/ns-allinone-2.34/otcl-1.13/otcl.c:495: undefined reference to 
`__stack_chk_fail_local'
otcl.o: In function `Otcl_Init':
/home/dhananjay/ns-allinone-2.34/otcl-1.13/otcl.c:2284: undefined reference to 
`__stack_chk_fail_local'
ld: libotcl.so: hidden symbol `__stack_chk_fail_local' isn't defined
ld: final link failed: Nonrepresentable section on output
make: *** [libotcl.so] Error 1
otcl-1.13 make failed! Exiting ...
See http://www.isi.edu/nsnam/ns/ns-problems.html for problems


umang joshi
sv-nit

Re: [ns] problem: Classfier::no-slot{} default handler (tcl/lib/ns-lib.tcl)

[Teerawat Issariyakul]

Hello Meriem,

I just put up a no-slot error on the following link.

http://www.ns2ultimate.com/post/520626807/classifier-no-slot-error

It might solve your problem.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat




On 4/13/2010, meriem bouzouita bouzouita_mer...@yahoo.fr wrote:


Hello,
My simulation generates the following error message:
Simulation is running...please wait...
--- Classfier::no-slot{} default handler (tcl/lib/ns-lib.tcl) ---
    _o14: no target for slot -1
 _o14 type: Classifier/Hash/Dest
 content dump:
 classifier _o14
 0 offset
 0 shift
 2147483647 mask
 1 slots
 slot 5: _o16 (Classifier/Port)
 -1 default
 -- Finished standard no-slot{} default handler --
I don't have any idea how to solve it,
please can you help me,
Thanks in advance
Best regards.


  

Re: [ns] add a new protocol to ns

[Teerawat Issariyakul]

Hi,

If you have a new module you would like to add to NS2, please go to

http://www.ns2ultimate.com/post/454001969/including-new-modules-into-ns-2

I hope it will help.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat


On 4/14/2010, lianxiaoxu lianxia...@126.com wrote:

Re: [ns] Error while running the tcl script while implementing a new protocol in ns2

[Teerawat Issariyakul]

Hi Learner,


The error is due to the following line

eval $node addr $args

Class Node does not have instproc addr. Therefore the Tcl spit out
the error.

To fix it, define instproc addr for the class of $node

If you would like to learn how to read OTcl error message, please read

http://www.ns2ultimate.com/post/419191200/tcl-error-message-in-ns2


Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat


On 4/13/2010, The Learner deeptisabnani.i...@pec.edu.in wrote:



When I run my tcl script, I get the following error-

(_o14 cmd line 1)
invoked from within
_o14 cmd addr
invoked from within
catch $self cmd $args ret
invoked from within
if [catch $self cmd $args ret] {
set cls [$self info class]
global errorInfo
set savedInfo $errorInfo
error error when calling class $cls: $args $...
(procedure _o14 line 2)
(SplitObject unknown line 2)
invoked from within
_o14 addr
(eval body line 1)
invoked from within
eval $node addr $args
(default arm line 2)
invoked from within
switch -exact $routingAgent_ {

MSClusterHead {
set ragent [$self create-msprotoch-agent $node]
}
MSDataDiscovery {
set ragent [$self create-msprotodd...
(procedure _o3 line 14)
(Simulator create-wireless-node line 14)
invoked from within
_o3 create-wireless-node
(eval body line 1)
invoked from within
eval $self create-wireless-node $args
(procedure _o3 line 23)
(Simulator node line 23)
invoked from within
$ns node
(for body line 2)
invoked from within
for {set i 0} {$i  $val(nn) } {incr i} {
   set node_($i) [$ns node]
   $node_($i) random-motion 0  ;# disable random motion
   }
(file simulation.tcl line 60)

What does this error mean? And how can I rectify this?

Thanks and Regards,
The Learner
--
View this message in context: 
http://old.nabble.com/Error-while-running-the-tcl-script-while-implementing-a-new-protocol-in-ns2-tp28219216p28219216.html
Sent from the ns-users mailing list archive at Nabble.com.

Re: [ns] How to call one function out of 2, using set nd [ns node] ???

[Teerawat Issariyakul]

HI Learner,

Instproc Simulator::node is just a way to create a basic node. If you
want a fancy node of your own, you can define another instproc
Simulator::my_node. At the Tcl simulation script, you can do something
like

set mynode [$ns my_node]


Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat


On 4/13/2010, The Learner deeptisabnani.i...@pec.edu.in wrote:



while creating a new node using the statement-
Using this statement set nd [ns node], a function defined in  ns-lib.tcl is
called(particular to a protocol).
In my case I have 2 agents, for different types of nodes and thus two
functions in ns-lib.tcl, how shall I specify which function to be called
while creating nodes using the statement set nd [ns node]...?

Regards,
The Learner
--
View this message in context: 
http://old.nabble.com/How-to-call-one-function-out-of-2%2C-using-set-nd--ns-node--tp28219421p28219421.html
Sent from the ns-users mailing list archive at Nabble.com.

Re: [ns] Error installing NS2 (tclcl make failed)

[Teerawat Issariyakul]

Hi Hassan,

I did some test on NS2 installation few weeks ago. Here is the result

http://www.ns2ultimate.com/post/439346614/working-combination-ns-2-34-ubuntu-8-04-and-perhaps

There is a problem with the current linux-like distribution. Here is the
solution

http://www.ns2ultimate.com/post/441093095/ns-2-35-works-on-cygwin

I get ns-2.34 working on Ubuntu 8.04. But I'm not sure about ns-2.29. I
hope this will help.

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear

On 4/13/2010, Topgun007 hamid...@gmail.com wrote:



Hi Katsaros,

I am facing the same problem, trying to install ns2.29 on Ubuntu 8.04 but
getting tcl compilation errors. Have you fixed the problem and able to
install sucessfully. Can you please share your experience and
patches/packages installed.

Regards
Hassan


LeCost wrote:
 
 
 Hey there,
 
 I'm new in ns2. I tried to install it under Ubuntu 8.04, 9.10 and Fedora
 12
 (all of them running in VMware) but I always get the same error. tclcl
 does
 not compile.
 
 Tcl.cc: In member function ‘void Tcl::eval(char*)’:
 Tcl.cc:182: warning: deprecated conversion from string constant to 
 ‘char*’
 Tcl.cc: In member function ‘int TclObject::traceVar(const char*,
 TclObject*)’:
 Tcl.cc:421: warning: deprecated conversion from string constant to 
 ‘char*’
 Tcl.cc: In static member function ‘static int
 TclClass::create_shadow(void*,
 Tcl_Interp*, int, const char**)’:
 Tcl.cc:509: warning: deprecated conversion from string constant to 
 ‘char*’
 Tcl.cc:511: warning: deprecated conversion from string constant to 
 ‘char*’
 *Tcl.cc: In static member function ‘static int
 TclClass::dispatch_instvar(void*, Tcl_Interp*, int, const char**)’:
 Tcl.cc:566: error: invalid conversion from ‘const char*’ to ‘char*’*
 Tcl.cc:571: warning: deprecated conversion from string constant to 
 ‘char*’
 Tcl.cc: In member function ‘virtual void TclClass::bind()’:
 Tcl.cc:603: warning: deprecated conversion from string constant to 
 ‘char*’
 Tcl.cc:605: warning: deprecated conversion from string constant to 
 ‘char*’
 make: *** [Tcl.o] Error 1
 tclcl-1.17 make failed! Exiting ...
 
 This was from the last attempt of ns2.29 under Fedora12 . same with 2.28
 
 I found in NS2 webpage that there was a problem with gcc 3.4 and tclcl but
 it says that it has been fixed.
 
 I want to install ns2.28 in order to work with 802.11e MAC possible under
 linux 9.10 that I'm more used to.
 
 Thank you for your help,
 
 Marry X-Mas!
 
 -- 
 Katsaros Konstantinos
 MSc Communications, Network and S/W
 Surrey University
 
 
 
 -- 
 Katsaros Konstantinos
 
 

-- 
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http://old.nabble.com/Error-installing-NS2-%28tclcl-make-failed%29-tp26924643p28232180.html
Sent from the ns-users mailing list archive at Nabble.com.

Re: [ns] how to find the no of packet drops

[Teerawat Issariyakul]

Hi Krishna,

I would use single null agent for the simulation. Then I would go to
modify the null agent to count packet every time it receives a packet.
At the end of simulation, have it print out all received packets.


Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear

On 4/13/2010, Krishna Balasa kbal...@gmail.com wrote:



 Hi,

 I am simulating a network traffic having 1000Mbps bandwidth having round
 trip of 80ms. The simulation runs for 100 seconds. I need to find the no of
 packet drops. For this I am generating the trace file. The problem I have is
 that the trace file generated is over 4GB and I believe linux has a
 limitation of 4GB file size. As a result complete trace file is not
 generated.

 My question is, is there another way of calculating no of packet drops.

 Any help is appreciated.

 Warm Regards,

 Krishna

Re: [ns] wireless tcl script true but the trace file hasn't the same format as for wireless script

[Teerawat Issariyakul]

Hi Emma,

You are using a new trace format. Please refer to

http://nsnam.isi.edu/nsnam/index.php/NS-2_Trace_Formats

for more information.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat





On 4/12/2010, Emma Ch di.anni...@yahoo.fr wrote:


I
am trying to construt a wireless tcl script that generates voice
traffic voip, i use this tcl script but the trace file hasn't the
same contents as the trace file for simple-wireless.tcl.
I explain more:
I use this tcl script

-tcl 
script--
set ns [new Simulator]
# choix des couleurs:
$ns color 0 blue
$ns color 1 red
$ns color 2 green
$ns color 3 red
$ns color 4 orange
$ns color 5 blue
$ns color 6 green
$ns color 7 black
$ns color 8 orange
$ns color 9 blue


# les dix noeuds: 
set n0 [$ns node]
set n1 [$ns node]
set n2 [$ns node]
set n3 [$ns node]
set n4 [$ns node]
set n5 [$ns node]
set n6 [$ns node]
set n7 [$ns node]
set n8 [$ns node]
set n9 [$ns node]



# création des outputs
 trace et nam:
set f [open emna.tr w]
$ns trace-all $f
set nf [open emna.nam w]
$ns namtrace-all $nf
# ==
# Define options
# ==
set val(chan)      Channel/WirelessChannel        ;# channel type
set val(prop)      Propagation/TwoRayGround       ;# radio-propagation 
model
set val(netif)  Phy/WirelessPhy        ;# network interface 
type
set val(mac)   
 Mac/802_11        ;# MAC type
set val(ifq)    Queue/DropTail/PriQueue      ;# interface queue 
type
set val(ll) LL     ;# link layer type
set val(ant)    Antenna/OmniAntenna        ;# antenna model
set val(rp) DumbAgent 
     ;# routing protocol
set val(start)  0.0
set val(ifqlen) 50 ;# max packet in ifq
set val(nn) 10
set val(tr) trace
set val(X)  500
set val(Y)  500
set val(CWmin)  16
set val(CWmax)  1024
set val(SlotTime)   0.09
set
 val(SIFS)   0.16
set val(basicRate)  2Mb
set val(dataRate)   54Mb
#
# Codec:  G.711
#
#set val(ON) 1500ms
#set val(OFF)    1500ms
#set val(AppRate)    96Kb
set val(pktsize) 160
set val(pktinterval) 0.020
set val(run) 50.0

#
# MAC
 MIB
#
Mac/802_11         set basicRate $val(basicRate)Mb
Mac/802_11         set dataRate  $val(dataRate)Mb
Mac/802_11         set CWMin $val(CWmin)
Mac/802_11         set CWMax $val(CWmax)
Mac/802_11         set SlotTime  $val(SlotTime)
Mac/802_11         set SIFS  $val(SIFS)
# set up topography object
set
 topo   [new Topography]
#$topo load_flatgrid $val(X) $val(Y)

# Create God
create-god $val(nn)

# configure node

 
    $ns node-config -adhocRouting $val(rp) \

             -llType $val(ll) \

             -macType $val(mac) \

             -ifqType $val(ifq) \

             -ifqLen $val(ifqlen) \

             -antType $val(ant) \

             -propType $val(prop) \

             -phyType $val(netif) \

             -channelType
 $val(chan) \

             -topoInstance $topo \

             -agentTrace ON \

             -routerTrace OFF \

             -macTrace OFF \

             -movementTrace OFF             
             

    for {set i 0} {$i  $val(nn) } {incr i} {

        set node_($i) [$ns node]     
        $node_($i) random-motion 0        ;# disable random motion

    }

# connection des noeuds entre eux: 
# $ns simple-link (duplex-link) $n0
 $n1 bandwidth delay queue_type
$ns duplex-link $n0 $n1 2Mb 2ms DropTail
$ns duplex-link $n0 $n2 2Mb 2ms DropTail
$ns duplex-link $n0 $n3 2Mb 2ms DropTail
$ns duplex-link $n0 $n4 2Mb 2ms DropTail
$ns duplex-link $n0 $n5 2Mb 2ms DropTail
$ns duplex-link $n0 $n6 2Mb 2ms DropTail
$ns duplex-link $n0 $n7 2Mb 2ms DropTail
$ns duplex-link $n0 $n8 2Mb 2ms DropTail
$ns duplex-link $n0 $n9 2Mb 2ms DropTail

# la création de l'agent / set ... [new Agent/type]
set rtp0 [new Agent/RTP]
# communication agent-network ($ns attach-agent $node $agent)
$ns attach-agent $n0 $rtp0
# la création de l'application / set ... [new Application/type]
set cbr0 [new Application/Traffic/CBR]
$cbr0 attach-agent $rtp0

set rtp1 [new Agent/RTP]
$ns attach-agent $n1 $rtp1
$rtp1 set class_ 1
set cbr1 [new

Re: [ns] ns2 installation problem....

[Teerawat Issariyakul]

Hi Sushma,

I did some test on NS2 installation few weeks ago. Here is the result

http://www.ns2ultimate.com/post/439346614/working-combination-ns-2-34-ubuntu-8-04-and-perhaps

There is a problem with the current linux-like distribution. Here is the
solution

http://www.ns2ultimate.com/post/441093095/ns-2-35-works-on-cygwin

I hope this will help.

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear

On 4/12/2010, Sushma M sushma@gmail.com wrote:


hello...


  i want to install ns2.1b9 or ns2.1b8a. pls help me. which os will
support these versions
i tried ns2.2b9 on redhat 9... its giving error. ns2 make failed [trace/
trace.o] error is coming.
so pls help me



Thanks
Sushma

Re: [ns] Graphs in ns2

[Teerawat Issariyakul]

Hi Nikitha,

I've never use XGraph. I only use Matlab.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat




On 4/10/2010, nikitha v v.niki...@gmail.com wrote:


Hello everybody,
 I found that u need to install tracegraph if u want to plot
graphs in ns2. But www.tracegraph.com is not working..can somebody forward
me tracegraph installation files and procedure to install it??
Hoping for a quick reply
Thanking you,
Nikitha

Re: [ns] segment fault

[Teerawat Issariyakul]

Hi Stalin,

Segmentation fault is usually due to memory access violation. A common
example is as follows.

int x[10];
x[20] = 0;

where you create an array x with 10 slots, but try to access 20th slot of
x.

Hope this will help.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat

On 4/9/2010, stalin babu stalin1...@gmail.com wrote:


 Hi all

when i am running a simulation with 10 nodes it's working fine,
when i am trying to
  run using 20 node , i got the Segmenatation fault error .

 pl help me it's urgent for my project

Re: [ns] ns-default.tcl ???

[Teerawat Issariyakul]

HI Pedro,

There is only one role for ns-default.tcl: Setting the initial values for
OTcl variables which are bound to C++. There is no other roles for this
file.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat




On 4/6/2010, pedro chaparro pdr...@gmail.com wrote:


Hi everyone,i'm a bit confuse about this file is used for, i wanna know
what's the rol of this file into ns2, when do i need to modify?, i know that
here the Agents valriables are initialized with default values, but besides
of this, have other important rol?
thanks
-- 
Ing Pedro Alonso Chaparro Valero
Ciudad Politecnica de la Innovación
iTEAM - Mobile Communications Group
Polytechnic University of Valencia
C\ Camino de Vera S/N, Edificio 8G
46022 Valencia, Spain

Re: [ns] Fwd: help...

[Teerawat Issariyakul]

Hi Sushma,

These two versions are quite outdated. The latest one is 2.35. I
installed in on Cygwin. It also works on Ubuntu as well. Here is the
instruction:

http://www.ns2ultimate.com/post/441093095/ns-2-35-works-on-cygwin

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat




On 4/6/2010, Sushma M sushma@gmail.com wrote:


hello...

   may i know ns2.1b9 or ns2.1b8a both of these versions can be
installed on which os  version?
i tried on fedora 7 its not working. so on which os can i install
ns2.1b9?



Sushma

Re: [ns] Problem when i am using TCL with awk

[Teerawat Issariyakul]

Hi Umang,

I find the following AWK website pretty useful. You might want to check
it out.

http://www.vectorsite.net/tsawk.html

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat




On 4/7/2010, umang singh singh.um...@hotmail.com wrote:



hi all,
I am facing problem when i am using baodv.tcl using awl script.I am not able 
to understand about the error.
please help me in this regard.
[r...@localhost aodv]# ns baodv.tcl
num_nodes is set 20
Creating nodes
INITIALIZE THE LIST xListHead
_o15
_o37
_o59
_o81
_o103
_o125
_o147
_o169
_o191
_o213
_o235
_o257
_o279
_o301
_o323
_o345
_o367
_o389
_o411
_o433
Loading random scenario pattern...
Loading Connection Pattern...
Starting Simulation
SORTING LISTS ...DONE!
channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
highestAntennaZ_ = 1.5,  distCST_ = 550.0
ns: finish: awk: packetloss.awk:23: END blocks must have an action part
while executing
exec awk -f packetloss.awk scripttr.tr
(procedure finish line 6)
invoked from within
finish



#This program is used to calculate the packet loss rate for CBR
  program

  BEGIN {
  # Initialization. Set two variables. fsDrops:
  packets drop. numFs: packets sent
  fsDrops
  = 0;
  numFs
  = 0;
  }
  {
 action = $1;
 time = $2;
 from = $3;
 to = $4;
 type = $5;
 pktsize = $6;
 flow_id = $8;
 src = $9;
 dst = $10;
 seq_no = $11;
 packet_id =
  $12;

  if
  (from==1  to==2  action == +)
  numFs++;
  if
  (flow_id==2  action == d)
  fsDrops++;
  }
  END {
  printf(number
  of packets sent:%d lost:%d\n, numFs, fsDrops);
  }it's very urgent for my work
regards
Umang
BVICAM,ND-63

_
Bollywood This Decade
http://entertainment.in.msn.com/bollywoodthisdecade/

Re: [ns] Installing ns-2.28, 2.29 under Gentoo or Ubuntu

[Teerawat Issariyakul]

Hi Cesar,

I have to not tried Ubunto 2.6.27. But I did try Ubuntu 9.10. It doesn't
work. I guess the problem is because of the gcc package in later Linux
distribution. Please see the test result below:

http://www.ns2ultimate.com/post/439346614/working-combination-ns-2-34-ubuntu-8-04-and-perhaps

What you can do is to use NS-2.35 which fixed the gcc problem. Please
find the instruction here:

http://www.ns2ultimate.com/post/441093095/ns-2-35-works-on-cygwin

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat




On 4/3/2010, Cesar Cardenas cardenas.ce...@gmail.com wrote:


Dear all,
I need to install ns-2.28 or ns.2.29 under Gentoo 2.6.30 r8 or under
Ubuntu 2.6.27-7-server because I want to install WFQ for DiffServ:

http://sergioandreozzi.com/research/network/diffserv4ns/
http://www.augustoneto.com/technical.html
http://www.mail-archive.com/ns-users@isi.edu/msg01073.html

I already have ns-2.30, 2.31 and 2.34 on both machines.

When I try to install either ns-2.28 and ns-2.29 I got several errors,
some of them related to:

./common/packet.h:173: warning: deprecated conversion from string
constant to âchar*â
./sctp/sctp.h:253: warning: âtypedefâ was ignored in this declaration

But finally they don't compile:

make: *** [trace/trace.o] Error 1
Ns make failed!

I tried to look at the following webpage

http://www.isi.edu/nsnam/ns/ns-problems.html for problems

But the patch does not work.

http://www/isi.edu/nsnam/dist/solaris.patch

Any points to solve this problem will be very appreciated.
All the best,
César Cárdenas

Re: [ns] Problem with using ./configure command in ns2 while recompiling ns2

[Teerawat Issariyakul]

Hi the learner,

From what I can see, the error is due to class Agent/MyAgentOtcl is not
define. If you are not familiar with how to read Tcl error message,
please read

http://www.ns2ultimate.com/post/419191200/tcl-error-message-in-ns2

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat



On 3/29/2010, The Learner deeptisabnani.i...@pec.edu.in wrote:



Hi all.

I had downloaded a file, ex-linkage.cc from http://nile.wpi.edu/NS/ (OTcl
linkage) and placed it in /home/deepti/ns-allinone-2.34/ns-2.34/

I tried to run ./configure by being the super user and achieved the result.
Here is the output,

r...@deepti-laptop:/home/deepti/ns-allinone-2.34/ns-2.34# ./configure
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
http://old.nabble.com/file/p28067571/ex-linkage.cc ex-linkage.cc
http://old.nabble.com/file/p28067571/ex-linkage.tcl ex-linkage.tcl checking
how to run the C preprocessor... gcc -E
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking minix/config.h usability... no
checking minix/config.h presence... no
checking for minix/config.h... no
checking whether it is safe to define __EXTENSIONS__... yes
No .configure file found in current directory
Continuing with default options...
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu
checking for gcc... (cached) gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ISO C89... (cached) none needed
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking for ANSI C header files... (cached) yes
checking for string.h... (cached) yes
checking for main in -lXbsd... no
checking for socket in -lsocket... no
checking for gethostbyname in -lnsl... yes
checking for dcgettext in -lintl... no
checking for getnodebyname in -ldnet_stub... no
checking that g++ can handle -O2... no
checking if C++ libraries work without any namespace... no
checking if C++ libraries work with namespace std... yes
checking if STL works without any namespace... no
checking if STL works with namespace std... yes
checking should use STL... yes
checking for tcl.h... -I../include
checking for tclInt.h... -I../include
checking for libtcl8.4... -L../lib -ltcl8.4
checking for init.tcl... ../lib/tcl8.4
checking for http.tcl... ../lib/tcl8.4/http1.0
checking Tcl http.tcl library... yes
checking for tclsh8.4.18... no
checking for tclsh8.4... ../bin/tclsh8.4
checking for tk.h... -I../include
checking for libtk8.4... -L../lib -ltk8.4
checking for tk.tcl... ../lib/tk8.4
checking for otcl.h... -I../otcl-1.13
checking for libotcl1.13... -L../otcl-1.13 -lotcl
checking for tclcl.h... -I../tclcl-1.19
checking for libtclcl... -L../tclcl-1.19 -ltclcl
checking for tcl2c++... ../tclcl-1.19
checking for X11 header files
checking for X11 library archive
checking for XOpenDisplay in -lX11... yes
checking for XShmAttach in -lXext... yes
checking for libtcldbg... no
checking dmalloc... not requested with --with-dmalloc
checking for perl... /usr/bin
checking for ANSI C header files... (cached) yes
checking arpa/inet.h usability... yes
checking arpa/inet.h presence... yes
checking for arpa/inet.h... yes
checking fenv.h usability... yes
checking fenv.h presence... yes
checking for fenv.h... yes
checking netinet/in.h usability... yes
checking netinet/in.h presence... yes
checking for netinet/in.h... yes
checking for string.h... (cached) yes
checking for strings.h... (cached) yes
checking time.h usability... yes
checking time.h presence... yes
checking for time.h... yes
checking for unistd.h... (cached) yes
checking net/ethernet.h usability... yes
checking net/ethernet.h presence... yes
checking for net/ethernet.h... yes
checking for main in -lm... yes
checking for bcopy... yes
checking for bzero... yes
checking for fesetprecision... no
checking for feenableexcept... yes
checking for getrusage... yes
checking for sbrk... yes
checking for snprintf... yes
checking return type of random... long

Re: [ns] Fwd: SUB: Reg getting this NS2 code working

[Teerawat Issariyakul]

Hi Venkata,

If you are new to NS2, I suggest you to read the following blog.

http://www.ns2ultimate.com/post/434349586/for-ns2-newbies

It provides the fundamental steps in learning NS2.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat



On 3/28/2010, Venkata Ramana ramana.venkat...@gmail.com wrote:


Hello Everyone,

I am interested in knowing how to get this code working ... all it has are
folders and each folder containing different .cc C++ Files and .h Header
files.
I want to know what procedure i should follow to get this code up and
running ... i downloaded the code from the following link.

http://www.matthewjmiller.net/files/cs497ig_paper_code.tar.gz

It involves concepts on adding a protocol to the NS2 OCTL objects i guess.
I'm not so knowledgeable.
If any expert programmer can help me, i would appreciate it. Thank you.

Regards,
Venkata

Re: [ns] Reg Timer Handler Functions

[Teerawat Issariyakul]

Hi Jaya,

It's hard to explain the concept of the timer without knowing what event
scheduler is, and how it works. But I am going to give you quick answer.

Timer is used when you want to delay something. An example is TCP
retransmission timer, which will trigger TCP to retransmit the packet
after a given delay. Timer has interfaces to set (schedule), reset
(reschedule), and cancel.

I will blog about the event scheduler soon at my blog

www.ns2ultimate.com

(The current blog topic is routing modules and classifiers)

Anyway if you are in hurry you can have a look at chapters 4 and 12 in
the following books.

T. Issaraiyakul and E. Hossain, “Introduction to Network Simulator NS2”,
Springer 2009. Here is the link

http://www.amazon.com/gp/product/0387717595?ie=UTF8amp;tag=ns2ultteeiss-20amp;linkCode=as2amp;camp=1789amp;creative=9325amp;creativeASIN=0387717595

You may also find lecture notes and other resource at the following
website: http://www.ece.ubc.ca/~teerawat/NS2.htm

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat




n 3/28/2010, jaya vignesh jayavignes...@yahoo.co.in wrote:




Hi,
I would like to know the functioning of timer handler functions like resched 
and handle?? What is use of these?
Also, in my routing code, when i attach any traffic to my node like [cbr(0) 
start] in my tcl, automatically i should invoke a beaconing procedure 
function, where that particular node for which the cbr traffic is attached 
should send the beacon packet to find the satisfactory neighbor based on 
beacon reply.
Any sample flow to explain how to obtain the node for which the cbr traffic is 
attached.? 
Thanks,
Jayavignesh 

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Re: [ns] NS2.33 installation

[Teerawat Issariyakul]

HI Meriem,

I posted the installation of NS-2.35 below:

http://www.ns2ultimate.com/post/441093095/ns-2-35-works-on-cygwin

You should move to the latest version of NS2.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat



On 3/26/2010, meriem bouzouita bouzouita_mer...@yahoo.fr wrote:


Hello,
I'm trying to install NS2.33 under Windows XP. but when at the end of the 
simulation, I get:
Creating library file: libns.dll.a
g++ -DNSLIBNAME = \”libns.dll\” -Wl, -export-dynamic -o ns 
common/mai-modular.cc -ldl
/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../i686-pc-cygwin/bin/ld: cannot find 
ldl
Collect2: ld returned 1 exit status
Make: *** [ns] Error 1
Ns Make failed
So please how can I solve this problem,
Thanks a lot,
Best regards.


  

Re: [ns] Is common header a must in a packet and address type defined in config.h

[Teerawat Issariyakul]

Hi The Learner,

It is not a must. The header is just a place where you can store
information. It's fine to create your own type. What you have to do is
to tell the routing module to extract the address from your address
variable.

Best Wishes,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat



On 3/25/2010, The Learner deeptisabnani.i...@pec.edu.in wrote:



I want to know if using common header in packet is a must?
If I create my own packet header and do not include common header in my
packet, will it create any trouble?

Since I am working on a routing protocol for wireless sensor networks, the
addresses can't be of the type u_int32_t, so I created my own type(typedef
u_int8_t msaddr_t) in the config.h file. Will it siuffice or I need to do
some other things to make ns2 work with this type of address?

Thank You,
The Learner
--
View this message in context: 
http://old.nabble.com/Is-common-header-a-must-in-a-packet-and-address-type-defined-in-config.h-tp28024535p28024535.html
Sent from the ns-users mailing list archive at Nabble.com.

Re: [ns] Common header definition inside ns2 directory

[Teerawat Issariyakul]

Hi The Learner,

Yes, in fact NS2 has various type of packets, common header, ip header,
tcp header, and so on. But you need to be careful. Packet header and
packet type (e.g., PT_TCP) are two different things. Packet type is just
information embedded in packet header.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat



On 3/23/2010, The Learner deeptisabnani.i...@pec.edu.in wrote:



Hi.

Can there be multiple packet headers for a protocol implementation in ns2?

i.e, a packet header while sending broadcast in the network and another
packet header while sending data, and another packet header for sending
another type of broadcast...?
If thats the case, then I just need to define various constants for each
packet header,(PT_HDR1, PT_HDR2...etc). and use ch-ptype == PT_HDR1 to
check the type of header in a packet.

Please correct me if I am wrong.

Thank You,
The Learner.
--
View this message in context: 
http://old.nabble.com/Common-header-definition-inside-ns2-directory-tp27985812p27996580.html
Sent from the ns-users mailing list archive at Nabble.com.

Re: [ns] Common header definition inside ns2 directory

[Teerawat Issariyakul]

Hi,

It's in the file ns-2.35/common/packet.h.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat



On 3/22/2010, The Learner deeptisabnani.i...@pec.edu.in wrote:



Hi.

Which file in NS2 contains the definition of the common header (hdr_cmn)???

--
View this message in context: 
http://old.nabble.com/Common-header-definition-inside-ns2-directory-tp27985812p27985812.html
Sent from the ns-users mailing list archive at Nabble.com.

Re: [ns] EXEC error????

[Teerawat Issariyakul]

Hi Pietro,

Here is my suggestion. If you are sure that tcp_bt.tcl is correct,
try to run the following

ns tcp_bt.tcl 1
ns tcp_bt.tcl 2
ns tcp_bt.tcl 3
...

Keep changing the last number until it hits 15.

Does it create any error?

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear


On 3/21/2010, pietro.luig...@alice.it pietro.luig...@alice.it wrote:


Hi,

I try to execute this tcl script:

set maxDist 15
set stepDist 2

set maxVel 20
set stepVel 2
set xDest 14

for { set i 1 } { $i  $maxDist } { incr i } {
   #uso tcp_bt_df.tcl DISTANZATRAINODI
   puts TCP OVER BT DISTANZA FISSA: $i metri
   exec ns tcp_bt_df.tcl $i
}

and i have this error:

(10720/8.00) 0.015 (10720.00/723200.00) d: 0.00 0.00 l: 0.00 0.00 0.00

 Flow info: dateRate Delay DeliveryRaio --
1: 21340.00 (170720/8.00)  0.033507 (5.361120/160) 1.00 (1 - 
0/442)
0: 1340.00 (10720/8.00)0.001145 (0.183200/160) 1.00 (1 - 
0/442)
 nsCmd:_o53 start
Page time: 1.287225 2060
0 1340.00 (10720/8.00) 0.015 (10720.00/723200.00) d: 0.00 0.00 l: 0.00 0.00 
0.00
1 21340.00 (170720/8.00) 0.236 (170720.00/723200.00) d: 0.03 0.03 l: 0.00 0.00 
0.00
1 21340.00 (170720/8.00) 0.236 (170720.00/723200.00) d: 0.03 0.03 l: 0.00 0.00 
0.00
0 1340.00 (10720/8.00) 0.015 (10720.00/723200.00) d: 0.00 0.00 l: 0.00 0.00 
0.00
while executing
exec ns tcp_bt_df.tcl $i
(for body line 4)
invoked from within
for { set i 1 } { $i  $maxDist } { incr i } {
   #uso tcp_bt_df.tcl DISTANZATRAINODI
   puts TCP OVER BT DISTANZA FISSA: $i metri
   exec ns tcp_bt_df.tc...
(file tcp_bt.tcl line 10)


Where's the error??

I'm sure script TCL tcp_bt... is correct!

Thank u in advance,
Pietro

Re: [ns] Make file

[Teerawat Issariyakul]

Hi Learner,

The default make file is Makefile with no extension. If you would
like to add a new protocol. You can find the instruction on the post
below:

http://www.ns2ultimate.com/post/454001969/including-new-modules-into-ns-2

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat



On 3/19/2010, The Learner deeptisabnani.i...@pec.edu.in wrote:



Hi all

While trying a new protocol, we need to make changes in the makefile.
There are multiple makefiles( with extensions, .in, .vc), in which makefile
am i suppose to add the object file list? and where?
Also why should this be added?

Thank You,
The Learner
--
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http://old.nabble.com/Make-file-tp27950929p27950929.html
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Re: [ns] error when calling class $cls: $args

[Teerawat Issariyakul]

Hi Hitesh,

I think the problem occurs from this line

$agent if-queue [$self set ifq_(0)] 

The $agent (you have to check what class it is) does not have
if-queue defined as its instproc. Therefore it invokes instproc
unknown to create error message. This is the normal process of OTcl.

My suggestion is
1. Check the class of $agent
2. See whether it has instproc if-queue, if not
  2.1 change the class of the $agent
  2.2 define instproc if-queue

If you would like to know more about how to read tcl error message,
please read the following blog post.

http://www.ns2ultimate.com/post/419191200/tcl-error-message-in-ns2

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear

On 3/19/2010, hitesh sharma hitesh1987.i...@gmail.com wrote:


I am simulating cluster based routing protocol in ns2.. but when i run my
TCL code, I get the followin error :

(_o17 cmd line 1)

invoked from within

_o17 cmd if-queue _o20

 invoked from within

catch $self cmd $args ret

invoked from within

if [catch $self cmd $args ret]
{
set cls [$self info class]
global
errorInfo
set
 savedInfo
$errorInfo

error error when calling class $cls: $args
$...
(procedure _o17 line 2)

   (SplitObject unknown line 2)

invoked from within

$agent if-queue [$self set ifq_(0)]   

(procedure _o14 line 23)

  (Node/MobileNode add-target line 23)

invoked from within

$self add-target $agent $port

 (procedure _o14 line 15)

(Node attach line 15)

invoked from within

$node attach $ragent [Node set rtagent_port_]

(procedure _o3 line 75)

(Simulator create-wireless-node line 75)

   invoked from within

_o3 create-wireless-node

   (eval body line 1)

invoked from within

eval $self create-wireless-node $args

(procedure _o3 line 23)

  (Simulator node line 23)

   invoked from within

$ns_ node

(for body line 2)

invoked from within

for {set i 0} {$i  $opt(nn)} {incr i} {

set node_($i) [$ns_ node]

$node_($i) random-motion 0 ;#disable random motion

}

I checked ns-default.tcl and ns-lib.tcl but could not find the error.. Same
code written for AODV and DSDV in ns-lib works ..Please help.. Thanks
--
Hitesh Sharma
Department of Electronics and Computer
IIT Roorkee
Roorkee - 247667 , Uttarakhand
India

[ns] [ns: Adding new NS2 modules] Re: reg : Linking errors

[Teerawat Issariyakul]

Hi Gayathri,

First of all, in NS2 (in linux), the extension of C++ file is .cc not
.c++. So you have to change that first.

Secondly, if you would like to incorporate new NS2 modules (i.e., files
.cc, .h, .tcl). Please see

http://www.ns2ultimate.com/post/454001969/including-new-modules-into-ns-2

I hope it'll help.

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat

On 3/15/2010, gayathri devi k.gayathrid...@yahoo.co.in wrote:


Hai Everybody,

               For linking the c++ code with otcl
script, I have included the C++ code and it's object file under the ns2
directory and used make command to re-compile it for the changes
included. But it is producing the following errors ... So, Kindly
suggest me some guidelines regarding this 


[r...@localhost ns-2.34]# g++ -c greedy4.c++
linkage.tcl:1: error: ‘set’ does not name a type
agent.h:37: error: expected class-name before ‘{’ token
greedy4.c++:35: error: extra qualification ‘GreedyBound::’ on member 
‘readmatrix’
greedy4.c++:35: error: ‘void GreedyBound::readmatrix()’ cannot be 
overloaded
greedy4.c++:21: error: with ‘void GreedyBound::readmatrix()’
greedy4.c++:56: error:
 extra qualification ‘GreedyBound::’ on member ‘distance’
greedy4.c++:56: error: ‘void GreedyBound::distance()’ cannot be overloaded
greedy4.c++:19: error: with ‘void GreedyBound::distance()’
greedy4.c++:69: error: extra qualification ‘GreedyBound::’ on member 
‘greedy’
greedy4.c++:69: error: ‘void GreedyBound::greedy(int)’ cannot be overloaded
greedy4.c++:20: error: with ‘void GreedyBound::greedy(int)’
greedy4.c++:108: error: extra qualification ‘GreedyBound::’ on member 
‘findangle’
greedy4.c++:108: error: ‘void GreedyBound::findangle(double, double, 
double)’ cannot be overloaded
greedy4.c++:23: error: with ‘void GreedyBound::findangle(double, double, 
double)’
greedy4.c++:159: error: extra qualification ‘GreedyBound::’ on member 
‘display’
greedy4.c++:159: error: ‘void GreedyBound::display(int)’ cannot be 
overloaded
greedy4.c++:22: error: with ‘void
 GreedyBound::display(int)’
greedy4.c++:184: error: expected class-name before ‘{’ token
greedy4.c++:192: error: cannot define member function 
‘GreedyBound::BsrAgent::BsrAgent’ within ‘GreedyBound’
greedy4.c++:201: error: cannot define member function 
‘GreedyBound::BsrAgent::command’ within ‘GreedyBound’
greedy4.c++:210: error: cannot define member function 
‘GreedyBound::BsrAgent::MyprivateFunc’ within ‘GreedyBound’
greedy4.c++:216: error: expected `}' at end of input
greedy4.c++: In member function ‘void GreedyBound::readmatrix()’:
greedy4.c++:37: error: ‘Tcl’ was not declared in this scope
greedy4.c++:37: error: ‘tcl’ was not declared in this scope
greedy4.c++:37: error: ‘Tcl’ is not a class or namespace
greedy4.c++: In member function ‘void GreedyBound::distance()’:
greedy4.c++:60: error: ‘Tcl’ was not declared in this scope
greedy4.c++:60: error: ‘tcl’ was
 not declared in this scope
greedy4.c++:60: error: ‘Tcl’ is not a class or namespace
greedy4.c++: In member function ‘void GreedyBound::greedy(int)’:
greedy4.c++:72: error: ‘Tcl’ was not declared in this scope
greedy4.c++:72: error: ‘tcl’ was not declared in this scope
greedy4.c++:72: error: ‘Tcl’ is not a class or namespace
greedy4.c++:74: error: no matching function for call to 
‘GreedyBound::GreedyBound()’
greedy4.c++:11: note: candidates are: GreedyBound::GreedyBound(const 
GreedyBound)
greedy4.c++: In member function ‘void GreedyBound::findangle(double, double, 
double)’:
greedy4.c++:111: error: ‘Tcl’ was not declared in this scope
greedy4.c++:111: error: ‘tcl’ was not declared in this scope
greedy4.c++:111: error: ‘Tcl’ is not a class or namespace
greedy4.c++: In member function ‘void GreedyBound::display(int)’:
greedy4.c++:161: error: ‘Tcl’ was not declared in
 this scope
greedy4.c++:161: error: ‘tcl’ was not declared in this scope
greedy4.c++:161: error: ‘Tcl’ is not a class or namespace
greedy4.c++: In constructor ‘GreedyBound::BsrAgentClass::BsrAgentClass()’:
greedy4.c++:186: error: class ‘GreedyBound::BsrAgentClass’ does not have 
any field named ‘TclClass’
greedy4.c++: In static member function ‘static TclObject* 
GreedyBound::BsrAgentClass::create(int, const char* const*)’:
greedy4.c++:188: error: cannot convert ‘GreedyBound::BsrAgent*’ to 
‘TclObject*’ in return
greedy4.c++: At global scope:
greedy4.c++:189: error: expected unqualified-id at end of input
[r...@localhost ns-2.34]


Thanking You,
Gayathri


  Your Mail works best with the New Yahoo Optimized IE8. Get it NOW! 
 http://downloads.yahoo.com/in/internetexplorer/

Re: [ns] ns-2.34 installation problem

[Teerawat Issariyakul]

Hi Tom,

Thanks for your comments. I finally got to to work. NS-2.35 really works
under cygwin!! I also publish the step-by-step installation at the
following URL.

http://www.ns2ultimate.com/post/441093095/ns-2-35-works-on-cygwin

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat



On 3/11/2010, Tom Henderson t...@ponymail.com wrote:

On 3/10/10 12:01 AM, Teerawat Issariyakul wrote:


 Hi Sidney,

 Thank you for your email. I have tried the followings and all of them
 does not work.

 - Window XP, Cygwin 1.7, ns-2.33
 - Window XP, Cygwin 1.5, ns-2.33
 - Window XP, Cygwin 1.7, ns-2.34
 - Window XP, Cygwin 1.5, ns-2.34

 - Window 7, Cygwin 1.7, ns-2.33
 - Window 7, Cygwin 1.7, ns-2.34
 - I guess the other version won't work too.

 - Ubuntu 9.10, ns-2.33
 - Ubuntu 9.10, ns-2.34

 I am guessing that the problem is with recent change in gcc package of
 all Linux distribution.

 The one that work is Ubuntu 8.04 with ns-2.34.

 Lupe, you might want to try the same thing.

 What I do is that I set up a Ubuntu box inside a VMware running on
 Windows 7. It's a bit of hassle but it works.

 I will put the instruction up on my blog soon.

 Best Regards,
 Teerawat Issariyakul
 http://www.ns2ultimate.com/
 http://www.ece.ubc.ca/~teerawat
 http://www.t-issariyakul.blogspot.com

Teerawat, you should be able to take the ns-allinone-2.35-RC2 candidate
and either use that as is on Cygwin 1.7, or swap out the ns-2.35
directory for another version that you want to use.

As Sidney pointed out, these are posted here:
http://nsnam.isi.edu/nsnam/index.php/Roadmap

Please send testing results or bug reports or patches for this release
candidate to the ns-developers mailing list.

Thanks,
Tom

Re: [ns] ns-2.34 installation problem

[Teerawat Issariyakul]

Hi Sidney,

Thank you for your email. I have tried the followings and all of them
does not work.

- Window XP, Cygwin 1.7, ns-2.33
- Window XP, Cygwin 1.5, ns-2.33
- Window XP, Cygwin 1.7, ns-2.34
- Window XP, Cygwin 1.5, ns-2.34

- Window 7, Cygwin 1.7, ns-2.33
- Window 7, Cygwin 1.7, ns-2.34
- I guess the other version won't work too.

- Ubuntu 9.10, ns-2.33
- Ubuntu 9.10, ns-2.34

I am guessing that the problem is with recent change in gcc package of
all Linux distribution.

The one that work is Ubuntu 8.04 with ns-2.34.

Lupe, you might want to try the same thing.

What I do is that I set up a Ubuntu box inside a VMware running on
Windows 7. It's a bit of hassle but it works.

I will put the instruction up on my blog soon.

Best Regards,
Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com




On 3/8/2010, Sidney Doria ssdo...@gmail.com wrote:

Issariayakul,

this problem has been reported by me and is already addressed by Tom
in NS-2.35 RC, as you can see in the NS-2 roadmap:

http://nsnam.isi.edu/nsnam/index.php/Roadmap

You can use NS-2.33, NS-2.34 in Cygwin 1.5.25 (legacy-setup.exe), but
to install It in Windows 7, you must use compatible mode (as win95).
After the setup, recreate the icon in start menu (the original icon
won't work), or use the cygwin.bat directly.


Sidney Doria
UFCG / BRAZIL

2010/3/6 Teerawat Issariyakul teera...@ece.ubc.ca:


 Hi Lupe,

 I am facing the similar problem. Both Ns 2.33 and NS 2.34 do not work
 with Cygwin 1.7. The suggestion is to go back and use Cygwin 1.5.

 As for you problem--an alert for gcc is not found, I guess you can ignore
 it by pressing 'n'. GCC is on your system but NS2 just can't find it.
 You can begin building it.

 The real problem, (according to my guess), is you cannot build Tcl/Tk on
 Cygwin 1.7. I am trying several options. I would like to share it with
 you. Please see below:

 1. Cygwin 1.7 does not work for both 2.33 and 2.34.
 2. Cygwin 1.5 MAY work with 2.33 and 2.34. I tried it long ago. And, it
 worked. The problem is I cannot find Cygwin 1.5 anywhere. I try to use
 setup-legacy.exe from Cygwin. But I have a feeling that it still install
 Cygwin v 1.7.
 3. Cygwin 1.5 does not work with Windows 7. Even if you get it to work,
 you cannot run it on Windows 7.

 Here is my main question: Where do you get Cygwin 1.5.25.

 Thanks,
 Best Regards,
 Teerawat Issariyakul
 http://www.ns2ultimate.com/
 http://www.ece.ubc.ca/~teerawat
 http://www.t-issariyakul.blogspot.com


 On 3/5/2010, Lupe Krops lupe...@yahoo.com wrote:


Hi to everyone,


I'm trying to install ns-allinone-2.34 on win xp.
I have installed the full package of cygwin v. 1.7.1.
When I tried to ./install the ns-2.34 it gave me the message
the Package gcc is not present on your system (also cannot
find xorg-x11-base and xfree86-base). I found a post
saying that ns-2.34 best works with cygwin 1.5.25, so i removed
the previous version of cygwin and installed v. 1.5.25.
However, it gives me the same errors.
I checked with gcc -v command and shows me that it runs gcc version 3.4.4
Also i compiled (without any problem) a .c file, just to see that the 
compiler is
successfully installed.

I really don't know what else to do or what to check.
Any help is much appreciated.

Regards,
Lup









-- 
Sidney Doria
Redes ad hoc móveis
Doutorado em Computação
UFCG
Brasil

Nessa jornada, o conhecimento será o seu escudo...
(Mestre dos Magos no episódio do grimoire de ouro)

[ns] ns-2.34 installation problem AND the working Solution

[Teerawat Issariyakul]

Hi Aslinda,

Thanks for your comments. BTW, how do you uninstall/install gcc 4.3? Do
you have any suggestion of website which gives instruction?

Lupe,

Aslinda gave a very good comment on gcc version. BTW, I just post a note
on how to install NS2 on Ubuntu. Please see the following post.

Problem:
http://www.ns2ultimate.com/post/439346614/working-combination-ns-2-34-ubuntu-8-04-and-perhaps

Solution:
http://www.ns2ultimate.com/post/425358640/ns2-windows-7-and-cygwin-1-7-what-a-nightmare

Best Regards,

Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417
http://twitter.com/T_Bear
http://www.t-issariyakul.blogspot.com
http://www.ece.ubc.ca/~teerawat






On 3/10/2010, Aslinda Hassan aslinda.has...@mun.ca wrote:

Hi..

Just to add, I have successfully install ns-2.34 in ubuntu 9.10.  But you
are right about the gcc distribution, since ubuntu 9.10 uses gcc-4.4.  When
I used the default version of gcc in ubuntu 9.10, I did encounter some
problems. So, I downloaded gcc-4.3 and changed the gcc compiler in the
makefile.in.  Once I did that, everything went well.  


Regards

Aslinda Hassan
Computer Engineering Research Lab
Faculty of Engineering and Applied Science
Memorial University of Newfoundland



 -Original Message-
 From: ns-users-boun...@isi.edu [mailto:ns-users-boun...@isi.edu] On
 Behalf Of Teerawat Issariyakul
 Sent: Wednesday, March 10, 2010 4:31 AM
 To: ssdo...@gmail.com; ns-users@ISI.EDU; lupe...@yahoo.com
 Subject: Re: [ns] ns-2.34 installation problem
 
 
 
 Hi Sidney,
 
 Thank you for your email. I have tried the followings and all of them
 does not work.
 
 - Window XP, Cygwin 1.7, ns-2.33
 - Window XP, Cygwin 1.5, ns-2.33
 - Window XP, Cygwin 1.7, ns-2.34
 - Window XP, Cygwin 1.5, ns-2.34
 
 - Window 7, Cygwin 1.7, ns-2.33
 - Window 7, Cygwin 1.7, ns-2.34
 - I guess the other version won't work too.
 
 - Ubuntu 9.10, ns-2.33
 - Ubuntu 9.10, ns-2.34
 
 I am guessing that the problem is with recent change in gcc package of
 all Linux distribution.
 
 The one that work is Ubuntu 8.04 with ns-2.34.
 
 Lupe, you might want to try the same thing.
 
 What I do is that I set up a Ubuntu box inside a VMware running on
 Windows 7. It's a bit of hassle but it works.
 
 I will put the instruction up on my blog soon.
 
 Best Regards,
 Teerawat Issariyakul
 http://www.ns2ultimate.com/
 http://www.ece.ubc.ca/~teerawat
 http://www.t-issariyakul.blogspot.com
 
 
 
 
 On 3/8/2010, Sidney Doria ssdo...@gmail.com wrote:
 
 Issariayakul,
 
 this problem has been reported by me and is already addressed by Tom
 in NS-2.35 RC, as you can see in the NS-2 roadmap:
 
 http://nsnam.isi.edu/nsnam/index.php/Roadmap
 
 You can use NS-2.33, NS-2.34 in Cygwin 1.5.25 (legacy-setup.exe), but
 to install It in Windows 7, you must use compatible mode (as win95).
 After the setup, recreate the icon in start menu (the original icon
 won't work), or use the cygwin.bat directly.
 
 
 Sidney Doria
 UFCG / BRAZIL
 
 2010/3/6 Teerawat Issariyakul teera...@ece.ubc.ca:
 
 
  Hi Lupe,
 
  I am facing the similar problem. Both Ns 2.33 and NS 2.34 do not
 work
  with Cygwin 1.7. The suggestion is to go back and use Cygwin 1.5.
 
  As for you problem--an alert for gcc is not found, I guess you can
 ignore
  it by pressing 'n'. GCC is on your system but NS2 just can't find
 it.
  You can begin building it.
 
  The real problem, (according to my guess), is you cannot build
 Tcl/Tk on
  Cygwin 1.7. I am trying several options. I would like to share it
 with
  you. Please see below:
 
  1. Cygwin 1.7 does not work for both 2.33 and 2.34.
  2. Cygwin 1.5 MAY work with 2.33 and 2.34. I tried it long ago. And,
 it
  worked. The problem is I cannot find Cygwin 1.5 anywhere. I try to
 use
  setup-legacy.exe from Cygwin. But I have a feeling that it still
 install
  Cygwin v 1.7.
  3. Cygwin 1.5 does not work with Windows 7. Even if you get it to
 work,
  you cannot run it on Windows 7.
 
  Here is my main question: Where do you get Cygwin 1.5.25.
 
  Thanks,
  Best Regards,
  Teerawat Issariyakul
  http://www.ns2ultimate.com/
  http://www.ece.ubc.ca/~teerawat
  http://www.t-issariyakul.blogspot.com
 
 
  On 3/5/2010, Lupe Krops lupe...@yahoo.com wrote:
 
 
 Hi to everyone,
 
 
 I'm trying to install ns-allinone-2.34 on win xp.
 I have installed the full package of cygwin v. 1.7.1.
 When I tried to ./install the ns-2.34 it gave me the message
 the Package gcc is not present on your system (also cannot
 find xorg-x11-base and xfree86-base). I found a post
 saying that ns-2.34 best works with cygwin 1.5.25, so i removed
 the previous version of cygwin and installed v. 1.5.25.
 However, it gives me the same errors.
 I checked with gcc -v command and shows me that it runs gcc version
 3.4.4
 Also i compiled (without any problem) a .c file, just to see that
 the compiler is
 successfully installed.
 
 I really don't know what else to do or what to check.
 Any help is much appreciated

[ns] For NS2 Newbies (Re: Implementing a new protocol in NS2)

[Teerawat Issariyakul]

Hi,

A lot of us would have got a lot of questions like I am an NS2
Newbie. Please help me. Tell me how to start learning NS2. Well, most
NS2 experts would know right off the bat that. It is very explain to
newbies what to do. Newbies, you have a long laundry list to do.

To help the newbies get started, I post a primer for newbie. For newbies,
don't get me wrong. I do not reduce the workload for you guys. You
still have the same amount of work to do. I just make it systematic. It
would give you a piece of mind when you know the number of steps you
have to go through, and know where you are now.

Please visit the blog post:

http://www.ns2ultimate.com/post/434349586/for-ns2-newbies

I hope it will help.

Best Regards,
Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com



On 3/6/2010, Teerawat Issariyakul teera...@ece.ubc.ca wrote:



Hi,

I don't mean to discourage you. But I think learning NS2 within its
scope is easy. But when you want to go beyond that, you've got a lot of
work to do. If you really want to know NS2, here is the step that I
would suggest you should learn.

1. Learn how NS2 pass packets from one object to another. The simplest
one is from a Node to a SimpleLink.
2. Learn how to bind C++ and OTcl. This is a hard one. It will be easier
when you understand the first step.
3. Learn the module you are interested in. Really, it's quite hard if
you don't have the basic in NS2, and want to jump start to do your own
work. It's like a baby trying to jump before learning how to crawl.
4. Modify, include, and build. This would be the final thing that you
need to learn. In fact, this step is quite easy you can actually learn
it first. You just have to change a few thing in the make file.

If you are interested. Here is a book from springer:

T. Issaraiyakul and E. Hossain, “Introduction to Network Simulator NS2”,
Springer 2009.

http://www.amazon.com/gp/product/0387717595?ie=UTF8tag=ns2ultteeiss-20linkCode=as2camp=1789creative=9325creativeASIN=0387717595

You may also find lecture notes and other resource at the following
website: http://www.ece.ubc.ca/~teerawat/NS2.htm

Best Regards,
Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com

On 3/6/2010, The Learner deeptisabnani.i...@pec.edu.in wrote:



Hi all.
I am a newbie in NS2.
I need your help in guiding me as to how should I implement my own protocol
in Wireless sensor networks in NS2. How should I proceed ?
What is it that I need to know priori implementation of new protocol.
I know the scripting in tcl by reading the document -
http://www.isi.edu/nsnam/ns/tutorial/
but I am not clear with the C code it  uses to implement the new protocol in
NS2.

Kindly guide me with the same asap.

Thank You.
Regards,
The Learner...
--
View this message in context: 
http://old.nabble.com/Implementing-a-new-protocol-in-NS2-tp27803359p27803359.html
Sent from the ns-users mailing list archive at Nabble.com.

Re: [ns] Implementing a new protocol in NS2

[Teerawat Issariyakul]

Hi,

I don't mean to discourage you. But I think learning NS2 within its
scope is easy. But when you want to go beyond that, you've got a lot of
work to do. If you really want to know NS2, here is the step that I
would suggest you should learn.

1. Learn how NS2 pass packets from one object to another. The simplest
one is from a Node to a SimpleLink.
2. Learn how to bind C++ and OTcl. This is a hard one. It will be easier
when you understand the first step.
3. Learn the module you are interested in. Really, it's quite hard if
you don't have the basic in NS2, and want to jump start to do your own
work. It's like a baby trying to jump before learning how to crawl.
4. Modify, include, and build. This would be the final thing that you
need to learn. In fact, this step is quite easy you can actually learn
it first. You just have to change a few thing in the make file.

If you are interested. Here is a book from springer:

T. Issaraiyakul and E. Hossain, “Introduction to Network Simulator NS2”,
Springer 2009.

http://www.amazon.com/gp/product/0387717595?ie=UTF8amp;tag=ns2ultteeiss-20amp;linkCode=as2amp;camp=1789amp;creative=9325amp;creativeASIN=0387717595

You may also find lecture notes and other resource at the following
website: http://www.ece.ubc.ca/~teerawat/NS2.htm

Best Regards,
Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com

On 3/6/2010, The Learner deeptisabnani.i...@pec.edu.in wrote:



Hi all.
I am a newbie in NS2.
I need your help in guiding me as to how should I implement my own protocol
in Wireless sensor networks in NS2. How should I proceed ?
What is it that I need to know priori implementation of new protocol.
I know the scripting in tcl by reading the document -
http://www.isi.edu/nsnam/ns/tutorial/
but I am not clear with the C code it  uses to implement the new protocol in
NS2.

Kindly guide me with the same asap.

Thank You.
Regards,
The Learner...
--
View this message in context: 
http://old.nabble.com/Implementing-a-new-protocol-in-NS2-tp27803359p27803359.html
Sent from the ns-users mailing list archive at Nabble.com.

Re: [ns] ns-2.34 installation problem

[Teerawat Issariyakul]

Hi Lupe,

I am facing the similar problem. Both Ns 2.33 and NS 2.34 do not work
with Cygwin 1.7. The suggestion is to go back and use Cygwin 1.5.

As for you problem--an alert for gcc is not found, I guess you can ignore
it by pressing 'n'. GCC is on your system but NS2 just can't find it.
You can begin building it.

The real problem, (according to my guess), is you cannot build Tcl/Tk on
Cygwin 1.7. I am trying several options. I would like to share it with
you. Please see below:

1. Cygwin 1.7 does not work for both 2.33 and 2.34.
2. Cygwin 1.5 MAY work with 2.33 and 2.34. I tried it long ago. And, it
worked. The problem is I cannot find Cygwin 1.5 anywhere. I try to use
setup-legacy.exe from Cygwin. But I have a feeling that it still install
Cygwin v 1.7.
3. Cygwin 1.5 does not work with Windows 7. Even if you get it to work,
you cannot run it on Windows 7.

Here is my main question: Where do you get Cygwin 1.5.25.

Thanks,
Best Regards,
Teerawat Issariyakul
http://www.ns2ultimate.com/
http://www.ece.ubc.ca/~teerawat
http://www.t-issariyakul.blogspot.com


On 3/5/2010, Lupe Krops lupe...@yahoo.com wrote:


Hi to everyone,


I'm trying to install ns-allinone-2.34 on win xp.
I have installed the full package of cygwin v. 1.7.1.
When I tried to ./install the ns-2.34 it gave me the message
the Package gcc is not present on your system (also cannot 
find xorg-x11-base and xfree86-base). I found a post
saying that ns-2.34 best works with cygwin 1.5.25, so i removed 
the previous version of cygwin and installed v. 1.5.25.
However, it gives me the same errors.
I checked with gcc -v command and shows me that it runs gcc version 3.4.4
Also i compiled (without any problem) a .c file, just to see that the compiler 
is 
successfully installed.

I really don't know what else to do or what to check. 
Any help is much appreciated.

Regards,
Lup


  

Re: [ns] [Suggestion for your question]: help!!! Adding new protocol in NS2

[Teerawat Issariyakul]

Hello Manoop,

I think here is the main error:

...
invoked from within
“_o14 addr”
(“eval” body line 1)
invoked from within
“eval $node addr $args”
...

The line “eval $node addr $args” tries to invoke the instproc addr of
$node. So what you have to see is

1. The class of $node (whether it is Node, MobileNode, and so on).
2. Track down the instproc addr of that class.

My guess is that the instproc addr does not exist for some reasons.
You have to find out why. If you don't need it, then  modify the Tcl
code to remove it. But if you need it, then add instproc addr to the Tcl
file.

If you don't know about how to read the Tcl Error message, you can visit
my blog at
http://ns2ultimate.tumblr.com/post/419191200/tcl-error-message-in-ns2, or
http://t-issariyakul.blogspot.com/2010/02/tcl-error-message-in-ns2_28.html

Also, for more information about Tcl/OTcl, see Chapter 3 and Appendix A
in the following book from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You may also find the following website useful:
http://www.ece.ubc.ca/~teerawat/NS2.htm


BR,
Best Regards,
Teerawat Issariyakul
http://www.ece.ubc.ca/~teerawat
http://t-issariyakul.blogspot.com
http://ns2ultimate.tumblr.com/ (Beta)



Hello NS Users,

I installed ns2.34 allinone in ubuntu 9.10. And first time, I am trying to
add a new protocol in NS2.
I followed the steps at:
http://masimum.inf.um.es/nsrt-howto/pdf/nsrt-howto.pdf

After applying changes, I did:
$ make clean
$ make

When I run my tcl script then it gives below error. I thought NS2 is not
identifying the new protocol that I added. The new protocol name that I
added is LVRF and used the same name in TCL script. TCL script is
attached.
Please guide me to fix the issue.

(_o14 cmd line 1)
invoked from within
“_o14 cmd addr”
invoked from within
“catch “$self cmd $args” ret”
invoked from within
“if [catch $self cmd $args ret] {
set cls [$self info class]
global errorInfo
set savedInfo $errorInfo
error “error when calling class $cls: $args” $…”
(procedure “_o14#8243; line 2)
(SplitObject unknown line 2)
invoked from within
“_o14 addr”
(“eval” body line 1)
invoked from within
“eval $node addr $args”
(“default” arm line 2)
invoked from within
“switch -exact $routingAgent_ {
DSDV {
set ragent [$self create-dsdv-agent $node]
}
DSR {
$self at 0.0 “$node start-dsr”
}
AODV {
set ragent [$self cre...
(procedure _o3 line 14)
(Simulator create-wireless-node line 14)
invoked from within
_o3 create-wireless-node
(eval body line 1)
invoked from within
eval $self create-wireless-node $args
(procedure _o3 line 23)
(Simulator node line 23)
invoked from within
$ns_ node
(for body line 2)
invoked from within
for {set i 0} {$i  $val(nn) } {incr i} {
set node_($i) [$ns_ node]
$node_($i) random-motion 0;
}
(file lvrf.tcl line 63)

--
Regards,
Manoop Talasila
Ph.D. student
CS Dept, NJIT
Email: m...@njit.edu

On 2/23/2010, manoop talasila m...@njit.edu wrote:

Re: [ns] randomizing runs

[Teerawat Issariyakul]

Hi Abu,

By default, NS2 is deterministic. If you would like to run NS2 in
randomized scenarios, you need to execute

$defaultRNG seed n

prior to $ns run, where n is an integer. If n is zero, NS2 will
use the current time and counter as a seed for random number generator.
By default, n is set to 1, meaning every run would generate the
same result. You may manually change the seed (e.g., 2, 3, 4, and so
on), or set it to zero.

I also posted the details on my blog at

http://t-issariyakul.blogspot.com/2009/09/ns2-deterministic-vs-random.html


For more information about Random Number Generators, see Chapter 12 in
the following book from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You may also find the following website useful:
http://www.ece.ubc.ca/~teerawat/NS2.htm


Best Wishes,
Teerawat

On 9/18/2009, abu shahriar azmshahr...@gmail.com wrote:


Hi all,

I am in trouble with randomizing ns run by seeding defaultRNG or ns-random.
Can anyone help me about how to randomize runs? I am using a wired network
topology.

Thanks.

--Shahriar

Re: [ns] Please Help

[Teerawat Issariyakul]

Hi,

You may run make again from NS2 directory. It will create ns.exe.

Best Regards,
Teerawat

On 9/22/2009, Sula K ksul...@yahoo.com wrote:


Daer my brothers,

in ns 2  I did rm ns.exe instead rm nam.exe ,

after that when  iexcuted the following problem come out on the screen?

u...@user-cfab0b1f55 ~
$ ns.exe
bash: ns.exe: command not found


  

Re: [ns] how to modify tcp

[Teerawat Issariyakul]

Dear Vaishali,

NS2 has two versions of SACK: Agent/TCP/Sack1 and Agent/TCP/SackRH. Check
out the details in files ~ns/tcp/tcp-sack1.* and tcp-sack-rh.*

BR
Teerawat




On 6/4/2009, vaishali mandhare v_mandh...@yahoo.com wrote:


hello all,
I want to increase performance of tcp in maodv but I cant do, instead  of 
traditional tcp want to use reno or sack tcp. I was make changes but getting 
same result. Bellow is my tcl script for tcp . If anyone has idea about it 
please inform me as early as possible.
 

set tcp_(0) [new Agent/TCP/Reno]
$tcp_(0) set dst_addr_ 0xE00
$tcp_(0) set window_ 32
$tcp_(0) set interval_ 1.0
$tcp_(0) set packetSize_ 256
$ns_ attach-agent $node_(0) $tcp_(0)
set ftp_(0) [new Application/FTP]
$ftp_(0) attach-agent $tcp_(0)
$ftp_(0) set type_ FTP
$ftp_(0) set maxpkts_ 1740
$ftp_(0) set dst_ 0xE00
$ns_ at 30.0 $ftp_(0) start

for {set i 40} {$i  50} {incr i} {
 $ns_ at 0.01 $node_($i) aodv-join-group 0xE00

wating for replay!
thanks!
vaishu! 


  Own a website.Get an unlimited package.Pay next to nothing.*Go to 
 http://in.business.yahoo.com/

Re: [ns] TCP agent and sink

[Teerawat Issariyakul]

Dear Vishal,

It won't. The reason is because you attach two TCP agents to two nodes.
Each node attach to different link. But the packets generated by both
TCP agents will go to the same place. When the packets reach the
destination, it would simply be destroy.

Of course, the contention would be at the link connecting into the
sink node. But that is the nature of packets sharing the node.

For more information about Links, Nodes, Agents and Applications, see the
following book from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You may also find the following website useful:
http://www.ece.ubc.ca/~teerawat/NS2.htm


On 5/27/2009, Vishal Agarwal vis...@gmail.com wrote:

But would both the agents will fight for channel contention or packets from
both the sources will go regardless of transmission from other end..??

On Wed, May 27, 2009 at 9:56 PM, Teerawat Issariyakul
teera...@ece.ubc.cawrote:


 Dear Vishal,

 Only one sink is necessary. But you do need to connect both tcp agent to
 the same sink by using $ns connect $tcp1 $sink and $ns connect
 $tcp2 $sink. The result would be the same as when you have two sinks.

 Best,
 Teerawat

 On 5/27/2009, Vishal Agarwal vis...@gmail.com wrote:

 
 Hello users,
 
 I am attaching 2 tcp agents at one source so do i need to attach 2 sinks
 at
 destination also or only 1 is sufficient. And when the agent tries to
 access
 the channel will there be any difference if there are two sinks rather
 than
 one?
 
 Thanks,
 
 --
 Vishal Agarwal
 




--
Vishal Agarwal

Re: [ns] TCP agent and sink

[Teerawat Issariyakul]

Dear Vishal,

Only one sink is necessary. But you do need to connect both tcp agent to
the same sink by using $ns connect $tcp1 $sink and $ns connect
$tcp2 $sink. The result would be the same as when you have two sinks.

Best,
Teerawat

On 5/27/2009, Vishal Agarwal vis...@gmail.com wrote:


Hello users,

I am attaching 2 tcp agents at one source so do i need to attach 2 sinks at
destination also or only 1 is sufficient. And when the agent tries to access
the channel will there be any difference if there are two sinks rather than
one?

Thanks,

--
Vishal Agarwal

Re: [ns] A problem about the length of a queue

[Teerawat Issariyakul]

Well, what you can do is to write a function, say lengthb()) in class
PacketQueue (there is a variable pq_ of class Queue). In this function,
determine the number of bytes of each packet from head_ to tail_ of a
PacketQueue object and returns the total number of bytes.

I posted how to determine the packet size at
http://t-issariyakul.blogspot.com/2009/02/packet-size-in-ns2.html


For more information about Packets, see Chapter 8 in the following book
from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You may also find the following website useful:
http://www.ece.ubc.ca/~teerawat/NS2.htm

Best,
Teerawat



hi everyone!

In NS2, the length of a queue is always caculated as the number of
packets in it.But we know that the size of a packet always differs from
another's. In my opinion, in practice the length of a queue should be
measured by the size, rather than the number, of all packets in it.
In my simulation, i need to simulate the length of the Q as the total
size in it,how can i achieve this?
thanks in advance!
Guisong Huang




´©Ô½µØÕð´ø ¼ÍÄîãë´¨µØÕðÒ»ÖÜÄê)

Re: [ns] Help on ns2 internal organization

[Teerawat Issariyakul]

Hi Qweq,

I agree with you when you change C++ code you WILL NEED to recompile it.
But, Udit, if you want to change topology, you will not need to modify
C++ code. You can do it in Tcl. Defining your own topology in Tcl does
not require recompilation. In fact, there is no Tcl compiler. Tcl is
just an interpreter.

Best,
Teerawat

On 5/10/2009, qweq adcsad nill_akaser_t...@yahoo.com wrote:




Your proposition is not true. The modified code should be recompiled to take 
an effect.

 On Sun, 5/10/09, Udit Kumar udit.v...@gmail.com wrote:

 From: Udit Kumar udit.v...@gmail.com
 Subject: [ns] Help on ns2 internal organization
 To: ns-users@ISI.EDU
 Date: Sunday, May 10, 2009, 5:03 AM
 Hi Friends,

 We say that in ns2 is build using C++ and Tcl language that
 allow modifying
 the topology and simulating without compiling the model
 again.

 Can you please tell me how this is happening, Why there is
 no need to
 recomiple c++ again, Or how data structure is maintained
 inside ns2/c++ so
 that there is no need to recompile again.

 Please help on this ASAP, It is urgent for me.

 Thanks  Regards,
 Udit Kumar

Re: [ns] to pass message class application to agent

[Teerawat Issariyakul]

Dear Gisane,

NS2 defines applications in class Application (see ~ns/apps/app.h,cc).
The derive classes of application are for example TrafficGenerator
(e.g., CBR) or FTP. The application models user demand. Therefore it
need to send message to an agent saying that a use needs to send data.
Here is how.

Class Application have a pointer to an Agent object, agent_. In order to
send a message with size nbyte bytes to an associated agent. It executes

agent-sendmsg(nbytes);

where the function sendmsg(...) belongs to class Agent. There are several
more ways that an Agent object can received a message. Those ways are
defined in function of class Agent (see ~ns/common/agent.cc).

(This message is posted in my blog at

http://t-issariyakul.blogspot.com/2009/04/how-application-sends-message-to-agent.html)

For more information about Agents and Applications, see Chapters 9-11 in
the following book from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You may also find the following website useful:
http://www.ece.ubc.ca/~teerawat/NS2.htm

Best Regards,
Teerawat

On 4/28/2009, Gisane Michelon gisan...@gmail.com wrote:


Somebody has a example how to pass a message of class application to
agent Ping? How I do this?
thanks
Ane

Re: [ns] ns problem1

[Teerawat Issariyakul]

You need to install XServer. Go to website of Cygwin or google to find
out how.

Best,
Teerawat

On 3/15/2009, ali bala mrbala...@yahoo.com wrote:

hi
i had problem with nam (i worke with ns-2 under cygwin)
i did this steps for troubleshooting untill now :
 
while running simple example programs, I get error, 

$ nam: no display name and no $DISPLAY environment variable. 

  

I tried set it with export DSIPLAY=:0.0 

it gives error   

$ nam: couldn't connect to display 0.0 

I also tried  startx before running programs, it gives following error, 

$ nam: 

[code omitted because of length] 

: no event type or button # or keysym 

   while executing 

bind Listbox MouseWheel { 

%W yview scroll [expr {- (%D / 120) * 4}] units 

} 

   invoked from within 

if {[tk windowingsystem] eq classic || [tk windowingsystem] eq aqua} { 

bind Listbox MouseWheel { 

%W yview scroll [expr {- (%D)}] units 

} 

bind Li... 

this is my bashrc file :
 
LD_LIBRARY_PATH=/home/ALI/ns-allinone-2.33/otcl-1.13:/home/ALI/ns-allinone-2.33//lib
TCL_LIBRARY=/home/ALI/ns-allinone-2.33/tcl8.4.18/library
export LD_LIBRARY_PATH
export TCL_LIBRARY
 
and my bash_profile file :
 
PATH=${HOME}/ns-allinone-2.33/bin:${PATH}

but  i have problem with nam now and i see this error :
 
$ nam: 
[code omitted because of length]
: no event type or button # or keysym
    while executing
bind Listbox MouseWheel {
%W yview scroll [expr {- (%D / 120) * 4}] units
}
    invoked from within
if {[tk windowingsystem] eq classic || [tk windowingsystem] eq aqua} {
bind Listbox MouseWheel {
%W yview scroll [expr {- (%D)}] units
}
bind Li...
 can anybody figure out where the problem lies? (and methode for solve)
thanks
mr.ali.balador
homepage:www.balador.org 


  )

Re: [ns] How to Drop Packets From a Particular Sender

[Teerawat Issariyakul]

Hi Mats,

I agree with you. In fact, function drop(p) will check whether the packet
is in used before dropping it. But the function drop(p) only exists for
an NsObject. Objects not derived from class NsObject may not define this
function.

If you guys would like to use Packet::free(p), you are responsible for
consistency check. Failing to do so may result in errors like
segmentation fault.

Best,
Teerawat

On 3/13/2009, Mats Folke mats.fo...@ericsson.com wrote:


Hi!

Wouldn't it be kind of dangerous to drop the packet using the first method 
described? The packet would jsut disappear and the logs would not be 
consistent. I would recommend using the latter method

drop(p)

instead. This makes the logging consistent and almost all objects I've come 
across where I would like to drop packets have been Connector objects.

Best regards,
Mats Folke

Teerawat Issariyakul wrote:
 Hi,
 
 Suppose you have a pointer p. You can drop the packet by executing
 
 
 Packet::free(p)
 
 Also the packet *p can be dropped from within the Connector object
 by invoking function drop as follows:
 
 drop(p);
 
 
 Note that drop(p) is a function of class Connector, and therefore
 must be invoked from within the scope of class Connector.
 
 I posted how to drop a a packet in the following blog:
 
 http://t-issariyakul.blogspot.com/2009/03/ns2-dropping-packet.html
 
 For more information about Connector and Packet, see Chapters 5 and 8,
 respectively, in the following book from Springer:
 
 T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
 NS2, Springer 2008.
 http://www.springer.com/engineering/signals/book/978-0-387-71759-3
 
 You may also find the following website useful:
 http://www.ece.ubc.ca/~teerawat/NS2.htm
 
 On 3/13/2009, muralikrishna g muralikrishn...@gmail.com wrote:
 
 
 Hi to all..
 
 i am using ns-2.33, here in my work i have to drop packets from a
 particular sender, i am planing to drop packets depending on the
 sender node_id 
 
 please help me regarding this..
 
 by
 
 Muralikrishna Gaddam (muralikrishn...@gmail.com)



-- 
Mats Folke, M.Sc., Lic.Eng.
Research Engineer

Ericsson AB Office: +46 10 7171385
Ericsson Research   Fax: +46 920 99621
P.O. Box 920Mobile: +46 76 1271385
SE-971 28 Luleå
Sweden

Re: [ns] Classifier no slot.

[Teerawat Issariyakul]

On 3/12/2009, Mayank Daga dagamay...@gmail.com wrote:
Hi,

Basically, you are accessing the slot -1 which does not exist. I posted
the details at

http://t-issariyakul.blogspot.com/2009/03/no-slot-error-for-classifiers.html

For more information about Classifiers, see Chapter 6 in the following
book from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You may also find the following website useful:
http://www.ece.ubc.ca/~teerawat/NS2.htm

Best,
Teerawat


Hey all,

I have been trying to implement normal wireless scenario using DSDV
protocol. The scenario has 49 equispaced nodes and there is some traffic
applied. The problem is when I run the TCL script, i get the following
output:

linux-v1gr:~/tcl # ns test_soma.tcl
num_nodes is set 49
warning: Please use -channel as shown in tcl/ex/wireless-mitf.tcl
INITIALIZE THE LIST xListHead
Starting Simulation...
channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
highestAntennaZ_ = 1.5,  distCST_ = 550.0
SORTING LISTS ...DONE!
--- Classfier::no-slot{} default handler (tcl/lib/ns-lib.tcl) ---
_o139: no target for slot -1
_o139 type: Classifier/Port
content dump:
classifier _o139
0 offset
0 shift
2147483647 mask
2 slots
slot 0: _o875 (CMUTrace/Recv)
slot 255: _o130 (Agent/DSDV)
-- Finished standard no-slot{} default handler --


Please help.

--
Regards,
Mayank Daga
Senior Undergraduate Student,
Department of Information Technology,
National Institute of Technology, Durgapur,
India

Re: [ns] ns problem

[Teerawat Issariyakul]

Hi,

Basically, you are accessing the slot -1 which does not exist. I posted
the details at

http://t-issariyakul.blogspot.com/2009/03/no-slot-error-for-classifiers.html

For more information about Classifiers, see Chapter 6 in the following
book from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You may also find the following website useful:
http://www.ece.ubc.ca/~teerawat/NS2.htm

Best,
Teerawat

On 3/11/2009, ali bala mrbala...@yahoo.com wrote:


hi
i wrote a simple example and run at ns but i see this:

--- Classfier::no-slot{} default handler (tcl/lib/ns-lib.tcl) ---
    _o18: no target for slot -1
    _o18 type: Classifier/Hash/Dest
content dump:
classifier _o18
    0 offset
    0 shift
    2147483647 mask
    1 slots
    slot 2: _o116 (Classifier/Port)
    -1 default
-- Finished standard no-slot{} default handler --

i havent understanding about that
i wanted to know about that
thanks



  

Re: [ns] ARQ implementation for terrestrial links

[Teerawat Issariyakul]

Dear Ioanis,

There is an example implementation of ARQ in the following book from
Springer useful.

T. Issariyakul and E. Hossain , Introduction to Network Simulator
NS2, Springer, Oct. 2008, ISBN: 978-0-387-71759-3

http://www.springer.com/engineering/signals/book/978-0-387-71759-3?detailsPage=otherBooksCIPageCounter=CI_MORE_BOOKS_BY_AUTHOR0

You may also find the following slides useful

http://www.ece.ubc.ca/~teerawat/NS2.htm

Best Regards,
Teerawat


On 1/10/2009, Ioannis Komnios ikomn...@ee.duth.gr wrote:


Dear ns-users,

I am trying to conduct some experiments using TCP on transport layer
and, at the same time, some reliable link layer protocol, like ARQ.
I've been trying for days to find an ARQ implementation in ns and I
have only found HDLC implementation for satellite links. Is there any
ARQ implementation available for terrestrial links? Or any other
reliable link layer protocol already implemented in ns2?

I would be grateful if you could help me...

Thank you in advance,

Ioannis Komnios

Re: [ns] Packet Arrival rate -- Need Help*

[Teerawat Issariyakul]

Dear LiViAn,

What do you mean by packet arrival rate? Arrive at the queue, or from the
source? Does it need to pertain to a certain TCP flow?

Best,
Teerawat

On 11/12/2008, LiViAn ZaH [EMAIL PROTECTED] wrote:




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Hello
 
I want to modify TCP westwood's scheme for packet arrival rate calculation. 
 
Do I need to modify the queue.cc file or i can do that same from westwood.cc ?
 
I m not so sure from which step I can begin --- Can anyone suggest 
some steps?
 
Thanks a lot.in advance.
 
Kindest Regards
LiViaN


  

Re: [ns] Packet Arrival rate -- Need Help*

[Teerawat Issariyakul]

Dear LiViAn,

What do you mean by packet arrival rate? Arrive at the queue, or from the
source? Does it need to pertain to a certain TCP flow?

Best,
Teerawat

On 11/12/2008, LiViAn ZaH [EMAIL PROTECTED] wrote:




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metaData: {
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YAHOO.Shortcuts.headerID = 0ad8d09d3b285675fdce2fa1f4d88458;







Hello
 
I want to modify TCP westwood's scheme for packet arrival rate calculation. 
 
Do I need to modify the queue.cc file or i can do that same from westwood.cc ?
 
I m not so sure from which step I can begin --- Can anyone suggest 
some steps?
 
Thanks a lot.in advance.
 
Kindest Regards
LiViaN


  

Re: [ns] How to send a packet to previous node

[Teerawat Issariyakul]

Dear Howard,

The easiest way to transmit from one NsObject (e.g. Nodes) to another is
through a (C++ and Tcl) Connector object. A connector has two pointers
to NsObjects: target_ and drop_. In the OTcl domain, it uses an OTcl
commands target and drop (followed by the name of the NsObject)
to specify its forwarding object and dropping object

A Connector object recieves a Packet p through its funciton
recv(p,h). Upon receiving a packet, the Connector object forwards the
packet p to its forwarding object by executing
target_-recv(p,h). To drop a packet, the function drop(p) of a
Connector object is invoked. In this case, the packet is forwarded to
the dropping object *drop_ which is responsible for destroying the
packet.

To find out more about Connector please refer to chapter 5 in the
following book from Springers:

If you are a beginning user, you may look at the following book from
Springer.

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.

Here is the link:
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You might also find the following slide useful:
http://www.ece.ubc.ca/~teerawat/NS2.htmhttp://www.ece.ubc.ca/%7Eteerawat/NS2.htm

On 11/11/2008, howardgod howardgod [EMAIL PROTECTED] wrote:


-- Forwarded message --
From: howardgod howardgod [EMAIL PROTECTED]
Date: 2008/11/8
Subject: How to send a packet to previous node
To: ns-users@isi.edu


I want to send a packet to previous node. And I don't know how to find
previous node's ID and where to fill the ID.

I found that in common header, there's a prev_hop and next_hop_. But the
prev_hop_ is NOT the previous node. It's the source.

So I want to fill previous node's ID to common header's next_hop_.

And is there anything else I have to fill?

btw I found a way to do so. Reverse the ip header's src and dst then send
it. but It still do nothing at all.

HELP ME!! PLZ

thanks a lot.

 Howard.

Re: [ns] How to send a packet to previous node

[Teerawat Issariyakul]

Dear Howard,

Say you have a topology like (n1)--(n2). Usually, packet will flow from
(n1) to (n2). When you want to send a packet from (n2) back to (n1), you
can do the following.

1. Define an instvar $conn (whose class Connector) of n2
2. Put the following in the Tcl simulation script

[$n2 set conn] target $n1

3. I don't know when you want to send the packet back to n1, but when
you want to do so, you can simply send the packet to $conn by using
function recv(p,h)

I hope this will help.

Regards,
Teerawat

On 11/11/2008, howardgod howardgod [EMAIL PROTECTED] wrote:

Deer Teerawat
I already know how to transmit to node. 1.generate new packet 2.fill common
header and destination address 3. target-recv(p,h)
but my problem is that, I can't find out previous hop's address. My purpose
is to send a packet to previous node in IFQ.
But when packet received by queue's recv function. I can't find anything
about previous hop's address in common header, ip header or mac-802_11
header.
I also know that in routing object, it can find out the next hop's
information in routing table. But unfortunately in IFQ can't access routing
object's functions.

any way, thanks a lot of ur reply.

Howard

2008/11/11 Teerawat Issariyakul [EMAIL PROTECTED]


 Dear Howard,

 The easiest way to transmit from one NsObject (e.g. Nodes) to another is
 through a (C++ and Tcl) Connector object. A connector has two pointers
 to NsObjects: target_ and drop_. In the OTcl domain, it uses an OTcl
 commands target and drop (followed by the name of the NsObject)
 to specify its forwarding object and dropping object

 A Connector object recieves a Packet p through its funciton
 recv(p,h). Upon receiving a packet, the Connector object forwards the
 packet p to its forwarding object by executing
 target_-recv(p,h). To drop a packet, the function drop(p) of a
 Connector object is invoked. In this case, the packet is forwarded to
 the dropping object *drop_ which is responsible for destroying the
 packet.

 To find out more about Connector please refer to chapter 5 in the
 following book from Springers:

 If you are a beginning user, you may look at the following book from
 Springer.

 T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
 NS2, Springer 2008.

 Here is the link:
 http://www.springer.com/engineering/signals/book/978-0-387-71759-3

 You might also find the following slide useful:
 http://www.ece.ubc.ca/~teerawat/NS2.htm
 http://www.ece.ubc.ca/%7Eteerawat/NS2.htm

 On 11/11/2008, howardgod howardgod [EMAIL PROTECTED] wrote:

 
 -- Forwarded message --
 From: howardgod howardgod [EMAIL PROTECTED]
 Date: 2008/11/8
 Subject: How to send a packet to previous node
 To: ns-users@isi.edu
 
 
 I want to send a packet to previous node. And I don't know how to find
 previous node's ID and where to fill the ID.
 
 I found that in common header, there's a prev_hop and next_hop_. But the
 prev_hop_ is NOT the previous node. It's the source.
 
 So I want to fill previous node's ID to common header's next_hop_.
 
 And is there anything else I have to fill?
 
 btw I found a way to do so. Reverse the ip header's src and dst then send
 it. but It still do nothing at all.
 
 HELP ME!! PLZ
 
 thanks a lot.
 
  Howard.
 

Re: [ns] how to implement extension to NS2

[Teerawat Issariyakul]

You may look at the following book from Springer.

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.

Here is the link:
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You might also find the following slide useful:
http://www.ece.ubc.ca/~teerawat/NS2.htmhttp://www.ece.ubc.ca/%7Eteerawat/NS2.htm

Best,
Teerawat
On 11/6/2008, Syed Md. Ashraful Karim [EMAIL PROTECTED] wrote:


Hi
I want implement a security extension to ad-hoc routing protocol in ns2.33. If 
anybody knows how to extend ns2, which core ns2.33 files are to be edited, or 
any tutorial on writing extension, please help me. Oh, I am a newbie in NS2 
and C++ (not in C).
Thanks,
Ashraf
Norwegian University of Science and Technology, Trondheim, Norway.

Re: [ns] where is the packet header offset set when a new packet is generated?

[Teerawat Issariyakul]

Packet construction is fairly subtle. In fact it consist of three phases:

1) At the compilation (when you type make):
In this phase, NS2 allocate the memory for all TclClasses.
PacketHeaderClass defined in file ~ns/common/packet.h,cc is one of them.
In the constructor of this class, the sizeof() is used to determine
space needed to store the packet header. The size is passed up the
hierarchy and stored in the variable hdrlen_.

2) At the network configuration phase: Remember that we have just compute
the size of each header. But the offset is the accumulation of the size.
When you invokes $ns run, instproc create_packetformat() is invoked.
Here the offset is computed by repeatedly added all the active header
together.

3) During the simulation phase: You may invoke function allocpkt() of
class Agent. Here the value of offset_ has already been set, and can be
used at will.

I suggest you to go through chapter 8 (specifically Section 8.3.8) in the
following book from Springer. You will find everything you need about
packets:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.

Here is the link:
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You might also find the following slide useful:
http://www.ece.ubc.ca/~teerawat/NS2.htmhttp://www.ece.ubc.ca/%7Eteerawat/NS2.htm

Best,
Teerawat


On 10/31/2008, matt Wood [EMAIL PROTECTED] wrote:


Dear all,
In NS2, the packet header must be accessed through its offset. But I can
not find where the offset_ is initialized. Please look and see if my
understanding of this issue is right or not:

In the RTPAgent, it is directly use hdr_cmn::access(p) to access the
header part. When the RTPAgent is configured in TCL, a binding is made to
connect the RTP header's offset to the offset_ of struct hdr_cmn.
Therefore, through the forced type conversion return (hdr_rtp*)
p-access(offset_); (in ns/apps/rtp.cc, and p is a pointer to a new Packet
instance), the offset_ in hdr_rtp (which is a child of hdr_cmn) is
initialized to the value configured through TCL.

   Thank you.

Re: [ns] How to measure rate of the traffic

[Teerawat Issariyakul]

Hi,

What UDP does is to create packets based on the application. Under your
scenario, Pareto tells UDP when to create a packet, and UDP will create
the packet accordingly. Therefore the rate of UDP is equal to the rate
at which the Pareto traffic is generated.

Best,
Teerawat

On 10/29/2008, J S [EMAIL PROTECTED] wrote:


Hello -

I am using pareto distribution to send UDP packets between two nodes.
I am wondering how would I measure the rate of the UDP packets sent between
the two nodes.

Thanks

Re: [ns] Generating packets on queue events

[Teerawat Issariyakul]

Hi,

In NS2, generating a new packet is not that complicated. Class Packet has
a function alloc() which returns a pointer to the created packet. You
may find the detail in file ~/ns/common/packet.h.

At the receiving end, you may process the packet in the function
recv(p,h), where p is a pointer to a packet.

There is a detailed packets (Chapter 8) and function recv(p,h) (Chapter
5) can be found in the following book from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.

Here is the link:
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You might also find the following slide useful:
http://www.ece.ubc.ca/~teerawat/NS2.htmhttp://www.ece.ubc.ca/%7Eteerawat/NS2.htm

Best,
Teerawat








On 10/28/2008, Prajjwal Devkota [EMAIL PROTECTED] wrote:


Hi everyone,

I am thinking of generating packets on certain queue events.  The packets
would be:

   1. generated by the link layer (in real life, but not necessarily in
   ns-2, an approximation would do)
   2. processed by the link layer on the receiving end, and acted upon

I am thinking of this as one possible implementation of a project I am
trying to do, though I am looking at other approaches too. (Such as using
global variables in conjunction for timers: where I have a problem of waking
up intervals right now).

Re: [ns] are there any TCP traffic models or generators on ns2?

[Teerawat Issariyakul]

Hi,

TCP itself cannot generated traffic. It receives a demand for data
transmission from a user. For example, you may use FTP and indicate that
a user has infinite demand to transfer data. TCP then takes that demand
and keep transmitting packets (practically forever).

If you want to create your own traffic. You are looking for application.
I'm not sure which type of traffic you are looking for (e.g., CBR,
exponential ON-OFF).

I suggest you to go through chapters 9-11 (esp. ch11) in the following
book from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.

Here is the link:
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You might also find the following slide useful:
http://www.ece.ubc.ca/~teerawat/NS2.htmhttp://www.ece.ubc.ca/%7Eteerawat/NS2.htm

Best,
Teerawat

On 10/29/2008, e f [EMAIL PROTECTED] wrote:


Hello,

my question is...Are there any TCP traffic models or generatos in ns2? How can 
i create my own traffic model ?



  
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Re: [ns] ns-2 simulation verification

[Teerawat Issariyakul]

Well,

Most of the time, you will have to see if the results make senses. But
for a good research, you will need analytical results as a comparison.

Regards,
Teerawat

On 10/27/2008, Ghada Khoriba [EMAIL PROTECTED] wrote:


Dear all,

How can I verify that the simulation results is right?
Is there any typical Scenario to use for testing?
 

Thanks in advance

Ghada 



  

Re: [ns] What is Packet Interval !!

[Teerawat Issariyakul]

Hi,

If you are talking about the time that you need to transmit packet, it is
actually defined by two things 1) packet size and 2) link
characteristics.

There is a detailed explanation of the packets and the scheduling (and
timers) in the book from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.

Here is the link:
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You might also find the following slide useful:
http://www.ece.ubc.ca/~teerawat/NS2.htmhttp://www.ece.ubc.ca/%7Eteerawat/NS2.htm


The following might be useful to you:

You can see the default packet size in the file ns-default.tcl (chapter
3). The packet size is different from one protocol to another. For
example, for TCP,

Agent/TCP set packetSize_ 1000

The second part depends on what link layer you are using. In a wired
network, the link layer delay is defined in a variable link_ of class
SimpleLink (chapter 7). This variable is bound to C++ class  LinkDelay.
It schedule two events: 1) the packets leave one place, and 2) the
packet arrive at another place. Class LinkDelay has variables bandwidth_
and delay_ (propagation delay). Based on these two variable as well as
the packet size, you can compute the packet interval.

Hope this would be helpful.

Best,
Teerawat

On 10/27/2008, Mathiew Moussa [EMAIL PROTECTED] wrote:


Hi Jianliang,

Thanks for the prompt reply, i appreciate it.

I was wondering .. ok i'm in the ns-default.tcl file ... but there's  
nothing called 'packet interval'. Does have a different name or  
terminology, where is it located in the file ?
And what does it exactly 'packet interval' , is it like TTL ?

and about adding it to the MY tcl as an alternative to the above, can  
you give me an example or how to add it.

Excuse me but I'm new at NS2 and details are important :)

Thanks Alot.
Mathiew





Quoting J GAO/Jianliang GAO [EMAIL PROTECTED]:

 Hi Mathiew,
  You can change Packet Interval value in the file ns-default.tcl in   
 folder ns-2.xx\tcl\lib. However, it is not so convenient to change   
 the value of interval by modifying ns-default.tcl every time you   
 test your code in different interval time. There is an alternative   
 way to change the value of interval. You can change the value in   
 your own .tcl code in the corresponding part of code of traffic you   
 use. Obviously, this way facilitates your test.
   To find out what exact reason causes the error, using ddd or gdb   
 to debug and track the code is very helpful.
   Regards,



 J GAO/Jianliang GAO
 2008-10-27



 发件人： Mathiew Moussa
 发送时间： 2008-10-27 16:34:13
 收件人： ns-users@ISI.EDU
 抄送：
 主题： [ns] What is Packet Interval !!


 Hi All ns-users,

 Does anyone know what Packet Interval in NS2 is and WHERE can when
 change it.

 you see im using the SMAC and it was giving me an error Couldn't
 Schedule Timer after i ran my TCL script .. I got an answer from one
 of the guys that it might possibly have to do with the packet interval.

 Thanks in Advance.

 Mathiew

Re: [ns] Problems with FEC, Poisson and Errmodel

[Teerawat Issariyakul]

Hi,

I guess you may look at chapters 11-12 the following book from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.

Here is the link:
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You might also find the following slide useful:
http://www.ece.ubc.ca/~teerawat/NS2.htmhttp://www.ece.ubc.ca/%7Eteerawat/NS2.htm


Here is the details:

(1) how to apply the errmodel to the incoming link with a random loss
probability whose value is r;

NS2 provides several built-in error model. If you are looking at a random
(non-correlated) loss, you may look at class ErrorModel in file
~ns/queue/errmodel.cc,h (Chapter 12). Here you can simply specify a
error probability and insert the error module into NS2.

You will need to know the basic of NS2 to configure and insert such the
error model.


(2) how to implement the arrival process from the source is the Poisson
with rate ¦Ë;

One of the easiest ways to generate a Poisson traffic is to create
arrivals whose inter-arrival time is exponentially distributed. NS2
provides built-in module to create exponentially distributed samples.
You may look at class ExponentialRandomVariable in file
~ns/tools/ranvar.h,cc (chapter 12) for this purpose. Alternatively, you
may see class Application/Traffic/Exponential in file ~ns/tools/expoo.cc
for example implementation.

(3) how to add FEC to the model
I am a NS-begniner ,can anyone give some help ,thank you very much !

Well, FEC can be integrated into a random error. If you codes can correct
at most n out of k bits. Then you can find a probability of having more
than n bit error in a packet, and use that as an error probability. BTW,
NS2 does have FEC module. You may refer to Chapter 12 on that regard.

Best,
Teerawat


hello,all
now,I am modelling random losses in the incoming link (uplink) and
congestion losses at node, I consider an M/M/1 queue with a finite
buffer of size K,and I assume that losses can caused either by a buffer
overflow or randomly with probability r in the incoming link .The
arrival process from the source is assumed to be Poisson with rate ¦Ë
and the service times of packets is exponentially distributed with rate
¦Ì.My scene for the model is as follows:
I use three mobile nodes,node(0),node(1) and node(2). node(1) forwards
the packets from node(0) to node(2).and now I have two problems:
(1) how to apply the errmodel to the incoming link with a random loss
probability whose value is r;
(2) how to implement the arrival process from the source is the Poisson
with rate ¦Ë;
(3) how to add FEC to the model
I am a NS-begniner ,can anyone give some help ,thank you very much !

Re: [ns] How to access mac layer in c++ of ns2

[Teerawat Issariyakul]

Hi Basim,

The connection from a node to a TCP agent is fairly subtle. Basically, a
Node has an instvar dmux_ which is a classifier. It install a TcpAgent
and TcpSink in the slot of the classifier dmux_. This occurs when
you invoke commands like

$ns attach-agent $n0 $udp0

You may find the details in the book (chs 4 and 6) from Springer:

T. Issaraiyakul and E. Hossain, Introduction to Network Simulator
NS2, Springer 2008.

Here is the link:
http://www.springer.com/engineering/signals/book/978-0-387-71759-3

You might also find the following slide useful:
http://www.ece.ubc.ca/~teerawat/NS2.htmhttp://www.ece.ubc.ca/%7Eteerawat/NS2.htm

Best Regards,
Teerawat

Re: [ns] Gettig error in simulation (ABORTING...)

[Teerawat Issariyakul]

Hi Sayed,

There must be something wrong in your program. NS2 has a bunch of
integrity checks. If there is something wrong (e.g., deallocating a
packet that does not exit), it will abort the program by invoking
function abort().

BR,
Teerawat
On 1/27/2008, Seyed Amin Hosseini Seno [EMAIL PROTECTED] wrote:


Dear all,
Hi,
After running simulation and just  after completed through 6 secs Im  
getting the below error in ns2.

void _ABORT(...) --- ABORTING...
Aborted (core dumped)

Would you please Advise me about this error. I m waiting for your reply.
Best Regards
Amin

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This message has been scanned for viruses and
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believed to be clean.

Re: [ns] target_ -recv ()

[Teerawat Issariyakul]

Well,

It is if you just implement the codes like that. In most cases, however,
you will not instantiate an object from class Connector. You will
implement a class derived from class Connector. In the derived class,
you will also have to override function recv.

For example, you can invoke function send(p,h) of a Queue object. In
class Queue, there is function recv. NS2 will invoke function
Queue::recv, rather than Connector::recv.

Cheers,
Teerawat

On 11/13/2007, Amin Hosseini [EMAIL PROTECTED] wrote:



Hi Dear All,

I am using NS2. In sendpkt() method of CBR_Agent, it calls
 target_-recv();

As target_ is defined in Connector class as pointer to NsObject class.
I follow NSobject and Connector classes .
I found :
Connector::recv(...){
   send(p,h);
}


and
Connector::send(...){
  target_-recv(p,h);

}

If I am right, It shows some kind of infinite recursion.  I am confused
 to find any  answer.

It is kind of you if help me to find the right scenario if I am wrong.
best regard
Amin




  Seyed Amin Hosseini,
  Computer PhD student,
Network Research Group (NRG) (http://nrg.cs.usm.my),
School of Computer Sciences (http://www.cs.usm.my),
University Science Malaysia (http://www.usm.my),
Penang - Malaysia,
Mobile: +60 16 438 9352
  


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Re: [ns] access to TCL instance variables

[Teerawat Issariyakul]

Nabila,

To print the value, you may do something like

puts [$myagent set myvar_]

Cheers,
Teerawat

On 11/6/2007, Nabila khedimi [EMAIL PROTECTED] wrote:


This is what I did, we can set a value to the variable like you did but how to 
get its value, for printing for example
 
 To: [EMAIL PROTECTED]; ns-users@ISI.EDU Subject: Re: [ns] access to TCL 
 instance variables From: [EMAIL PROTECTED] Date: Tue, 6 Nov 2007 08:13:30 
 -0800   Hi Nabila,  First of all, you need to bind your OTcl class 
 Agent/MyAgentOtcl to, for example, MyAgent. Secondly, suppose you need to 
 access variable my_var_ of class MyAgent. You need to bind this variable to 
 the OTcl domain. This can be done in the constructor:  MyAgent:MyAgent() 
 { bind(my_var_, my_var_); }  Then you will be able to access varaible 
 my_var_ from the OTcl domain:  set myagent [new Agent/MyAgentOtcl] 
 $myagent set my_var_ 10  Good Luck Teerawat  On 11/6/2007, Nabila 
 khedimi [EMAIL PROTECTED] wrote:Hi,How do we access instance 
 variables of a c++ class in tcl code I tried thefolowing: set myagent [new 
 Agent/MyAgentOtcl]# Set configurable parameters of MyAgent$myagent set 
 my_var1_otcl 4$myagent set my_var2_otcl 3.14$myagent call-my-priv-funcset 
 intvar 0set intvar [Agent/MyAgentOtcl my_var1_otcl] puts my_var1_otcl = 
 $intvar I have had this:my_var1_otcl= my_var1_otclthe name instead of th 
 value, what's the problem, neither set intvar $myagent my_var1_otcl works 
 Thanks for helpnabila 
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Re: [ns] How to recompile and run tcl files?

[Teerawat Issariyakul]

Say you want to include

myfile.cc

into NS2 code, you have to incorporate

myfile.o

in file Makefile

Open Makefile and look how an object file (myfile.o) can be incorporate
into the Makefile.

Finally, run make at ns2 directory, and you're done!!

Best,
Teerawat

On 9/13/2007, Kavuluri, Mallesh (IE10)
[EMAIL PROTECTED] wrote:




In SUMMARY,
what is the normal way to recompile .cc files that .tcl file
requires and run  the .tcl files? How shall we make necessary changes in
Makefile?

 I have tried make clean, make depend, ./configure, make.
Even I tried ./install in ns-allinone-2.28 folder and then tried the
above Make clean, ./configure, make clean, make depend and make
commands.
But still, I am getting the same old output. The changes that I have
made are not getting reflected in output.

 When I keep some error in .cc file, when using make, it is giving me
error.
When I correct it, make is  compiling successfully.

Any help or suggestion is greatly appreciated.

-Thanks and regards,
Mallesh

Re: [ns] printing the ackno

[Teerawat Issariyakul]

Hi,

A one-way TCP does not use field ackno_. Instead, the TCP Sink creates an
ACK packet by placing ACKNO in the field seqno_ of the ACK packet.

So you just need to print out  field seqno_  but you have to make sure
that the corresponding packet is an ACK number.

Cheers,
Teerawat

On 9/4/2007, Sebastian Harko [EMAIL PROTECTED] wrote:


Hello,
I want to print the acknowledgment number of every ACK in the terminal...
So I went to tcp.cc ( newack method ) and I did this:

cout  ACK number is:   tcph-ackno_  endl;

but all the ACK numbers it prints for a simple simulation are equal to
zero...
note that i was able to print the correct sequence numbers using the exact
same approach.
what am i doing wrong ?

regards

Re: [ns] warning:no class variable Trafficfile::debug_

[Teerawat Issariyakul]

Hi,

I think your problem may be caused by

1. You did not bind variable debug_ to the OTcl domain. Go to the Class
TrafficFile and see whether the variable debug_ is bound properly.

2. Class TrafficFile does not have the variable debug_ at all. In this
case, you have to declare it in Class TrafficFile.

Cheers,
Teerawat

On 8/31/2007, Candace Phelps [EMAIL PROTECTED] wrote:


Hello,

 warning:no class variable Trafficfile::debug_
  see tcl-object.tcl in tclcl for info about this warning

I was having a similar problem, and I found the solution here, as I
posted a few days ago to this list:
http://nile.wpi.edu/NS/
Click on Otcl linkage, and search for 'warning' on the page and read
about that.

Basically, you need to set this variable (debug_) in ns-default.tcl
(located here in my case:
cphelps/ns-allinone-2.31/ns-2.31/tcl/lib/ns-default.tcl). The format
of how to set the variable is as shown in the file:
SuperClass/Class set _variable_name_ #
eg
Trafficfile set debug_ 1.0

Hope that helps. 8-)

 I tried adding Trafficfile set debug_ false in
 ./tcl/lib/ns-default.tcl as mentioned in very old posts but
 unfortunetly it doesnt work in my case.

I think this solution was a work-around to ignore the problem.



--
Sincerely,

Candace Phelps
3rd Yr Honors CS Student


Quoting Francesco Trebbi [EMAIL PROTECTED]:


 Hi,

 I am trying to use some trace files to generate traffic but When I run
 the simulation I get
 the warning message:

 warning:no class variable Trafficfile::debug_
  see tcl-object.tcl in tclcl for info about this warning



 I tried adding Trafficfile set debug_ false in
 ./tcl/lib/ns-default.tcl as mentioned in very old posts but
 unfortunetly it doesnt work in my case.

 Does anyone has any ideas to solve this problem?


 Thanks, I appreciate.

 Francesco

Re: [ns] throughput calculation

[Teerawat Issariyakul]

Hi,

There are several ways to compute throughput. If you use TCP, the
simplest way is to measure the sequence number and divide it by
simulation time. You add the following into your simulation script

...
$ns at 10.0 $ftp stop
$ns at 10.1 puts puts \The final TCP sequence number is [$tcp set
$t_seqno_]\
$ns at 10.2 $ns halt

Then, you can compute the number of transmitted packets in 10.0 second
simulation time.


Cheers,
Teerawat




On 8/31/2007, JEHD MAHDI [EMAIL PROTECTED] wrote:



Hi there, is there any universal way to calculate packets throughput  and 
delay with or without use of certain scripts, i've tried a couple of scripts 
for this purpose but they don't seem to work!!


J Mahdi
Newcastle Upon Tyne
**


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Re: [ns] Ns2 problem in tclsh

[Teerawat Issariyakul]

Hi

Does ns start at all? From my understanding, its like ns works properly.
But the variable ns is not used properly. Try to replace ns with
$ns if you  ever define set ns [new Simulator]. The former one
is just a string while the latter one is the simulator object.

cheers,
Teerawat

On 8/30/2007, AZHAR MOHD ARIS [EMAIL PROTECTED] wrote:


I read yr comment in the website
http://mailman.isi.edu/pipermail/ns-users/1997-May.txt
..just want to asking u .what u mean by
tclsh7.6? i'm using ns2-31. because i get an error like below too.
is it need to delete 'everything' in gen

and make all again for ns2-31 folder?


rom [EMAIL PROTECTED]  Mon May  5 17:04:03 1997
From: [EMAIL PROTECTED] (Mark Handley)
Date: Mon, 05 May 1997 12:04:03 -0400

Subject: NS2 compiles, but doesn't run
In-Reply-To: Your message of Mon, 05 May 1997 11:42:54 EDT.
 [EMAIL PROTECTED]
Message-ID: 
[EMAIL PROTECTED]


we just installed ns-2.0a16, and I tried

  ns test-suite.tcl tahoe1

but I got the following error message:


invalid command name ns
while executing
ns node

Probably ns didn't build correctly because it couldn't find tclsh
which is needed to build ns-lib.tcl
 in the gen subdirectory.  The
build will have failed to build ns-lib.tcl properly, and so nothing
works.

Check whether this is in fact what's happening, by removing everything
in gen and re-making.  If this is the case, edit the Makefile so it

looks for tclsh7.6 or whetever it's installed as on your platform.

ANY BODY CAN X-PLAIN TO ME??

--
AZHAR MOHD ARIS (GS16917)
Master in Computer Science Candidate (Distributed Computing)
University Putra of Malaysia
+^019.613.742.2
YM: azuan76

Re: [ns] tcl script

[Teerawat Issariyakul]

Hi,

I suggest you to go thru NS2 FAQ http://www.isi.edu/nsnam/ns/ns-faq.html
and NS2 tutorial (e.g., http://www.isi.edu/nsnam/ns/tutorial/index.html)
before posting your question in the mailing list.

BR,
Teerawat


On 8/22/2007, wathig dawelbait [EMAIL PROTECTED] wrote:


hi I am new in using ns-2 and I am using ns-2.31 realy I need help in
biulding tcl script my project in (impact of udp on tcp in the internet) I
have to have from 1-100 mixed user
pls help me

[ns] Replying Etiquette

[Teerawat Issariyakul]

Hi All,

I am just wondering about this mailing list. There are a lot of questions
in this list. Suppose that some of us know the solution and would like
to help out. Do we suppose to REPLY to the sender only or REPLY
ALL so that others who have similar problems will know the answer too ?


Cheers,
Teerawat

[ns] Traffic Trace

[Teerawat Issariyakul]

Hi All,

Is anybody familiar with a traffic trace? It is a traffic generator (of
class Application/Traffic/Trace). I would like to know how would I
create a traffic trace file to attach to the application.

Thanks a lot,
Teerawat

Re: [ns] error with agent!!!

[Teerawat Issariyakul]

Class Agent/SP is not a built-in NS2 class. You have to create an access
to OTcl by using Tclclass. Then you will be able to access use it in
OTcl. for example,


static class TcpClass : public TclClass {
public:
TcpClass() : TclClass(Agent/TCP) {}
TclObject* create(int , const char*const*) {
return (new TcpAgent());
}
} class_tcp;

BR,
Teerawat


On 8/1/2007, hossein fotouhi [EMAIL PROTECTED] wrote:


Hi,
I received this error when running my file.
does anyone know where is the problem?
thank you

---

[EMAIL PROTECTED] bin]# ./ns wireless-spr.tcl 10 20
num_nodes is set 100
invalid command name Agent/SP
while executing
Agent/SP set sport_0
(file ./spr.tcl line 3)
invoked from within
source.orig ./spr.tcl
(uplevel body line 1)
invoked from within
uplevel source.orig [list $fileName]
invoked from within
if [$instance_ is_http_url $fileName] {
set buffer [$instance_ read_url $fileName]
uplevel eval $buffer
} else {
uplevel source.orig [list $fileName]
...
(procedure source line 8)
invoked from within
source ./spr.tcl
(file wireless-spr.tcl line 259)

Re: [ns] Error whit ns

[Teerawat Issariyakul]

At the end of the installation, there are three things you need to do
(shown on the screen). You have to set library variables and path into
your running environment.

BR,
Teerawat





On 8/1/2007, oscar andres [EMAIL PROTECTED] wrote:




 I was successful in installation, but I can't run the example script in in 
 tutorial simple.tcl. When i tried to run it gives few errors like:

bash: ns : command not found

What can i do
_
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Re: [ns] Simulation error

[Teerawat Issariyakul]

Dear Leonard,

$ns trace-all generally generates complete information in the trace file.
Unfortunately, you usually don't need most of it. A better way is not
to use it. If you are interested in for example if you are interested in
how seq. no. of TCP changes, you may use

$tcp trace t_seqno_

Another way is to print out your own text by modifying C++ source code
(e.g., using cout).

Cheers,
Teerawat

On 7/30/2007, Leonard Tracy [EMAIL PROTECTED] wrote:



Hi,

I am new to this mailing list and to NS 2.  I am trying to use NS 2 to
research new MAC protocols for sensor networks.  The majority of my
simulations run without error, but sometimes the simulation locks and
the trace file grows to many gigabytes.  When I look in the trace file
it is full of:

D 125.0 _2_ IFQ  END 0 tcp 0 [0 0 0 0] --- [0:0 0:0 0 0] [0
0] 0 0


The simulation I'm currently running has four nodes total.  Three of
them use CBR via UDP to send data to the 4th node.  I'm wondering if
anyone else has had a similar problem or a may know a solution.

Thanks for any help,
Leonard

Re: [ns] tcp sending rate

[Teerawat Issariyakul]

TCP does not have sending rate. It control transmission rate based on
window size. The initial window size is 1, and it is increases as ACK
packets are received. So you can't compute the sending rate in pkts/sec.

BR,
Teerawat



On 6/30/2007, Zahraa Taki Al-Lawati [EMAIL PROTECTED] wrote:


hi;
what is the defult sending rate in tcp agent when starting any conncection.
how can i change it ? and what is the unit of sending rate ( packet/sec or
b/sec )?

advise please

_
Don't just search. Find. Check out the new MSN Search!
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Re: [ns] Mobility Models

[Teerawat Issariyakul]

In my opinion, a beginner usually takes only few days to learn to use NS2
at TCL level. However, it will talk few months (or sometiem years) to
learn the structure of NS2 and how to modify it.



On 6/29/2007, salouhouni [EMAIL PROTECTED] wrote:



Hello everybody.I am a new user in NS2 and I will try to implement some
mobility models in NS2 and implement.As I have searched around I think that
it is quite difficult in a short period to implement one on my own so I will
try to test some already built ones.Cause I am a new user I would like to
ask how difficult it will be to get familiar with NS2 in order to use some
mobility models?Is it easy to use the existing ones and experiment on
them?How complicated is the code of such models and how easy it is to test
on different senarios?Thanks for the post and I hope that I will be able to
help somebody else when I get used to the program.Please If anybody know I
would be grateful to help me even if the questions look sily.Thanks again!:)
--
View this message in context: 
http://www.nabble.com/Mobility-Models-tf4001829.html#a11366754
Sent from the ns-users mailing list archive at Nabble.com.

Re: [ns] Call function of an agent

[Teerawat Issariyakul]

You have to declare your agent as a variable of another class. Initiate
the agent variable at the constructor of that class. Then you can call
public function of your Agent class through that variable.

See class Timer for example.

BR,
Teerawat


On 6/28/2007, Alexandre Malhão [EMAIL PROTECTED] wrote:


Hi,

I have my own agent class in ns. Is there any way for me to call a 
function inside this agent class from another class??

Best regards,

Alexandre Malhão

[ns] Need Help for TCPAgent::rtt_update()

[Teerawat Issariyakul]

Hi,

I have a question in regards to function rtt_update of class TcpAgent.
Here is the code:


= BEGIN CODE =
void TcpAgent::rtt_update(double tao)
{
...
double sendtime = now - tao;
sendtime += boot_time_;
double tickoff = fmod(sendtime, tcp_tick_);
printf(sendtime = %2.4f, boot_time_ = %2.4f, tickoff =
%2.4f\n,sendtime,boot_time_,tickoff);
t_rtt_ = int((tao + tickoff) / tcp_tick_);
}
...
}
= END CODE =
Why can't we use 'tao' as an RTT sample? Why do we have to consider
boot_time_ ?  It seems like tickoff is the offset which helps
line up tao to the end of tcp_tick after boot_time_ is
considered. But why do we need to consider boot_time_.

Thanks a lot.
Teerawat