simulation ns2

[sadjid...@gmail.com]

hi guys, pleeease help mee,  i have a problem while excuting this program :

#=== Input parameters =====================================

set val(nd) 5;  #distance between nodes

set val(retx) 1; #retransmission attempt for repeater

set val(filename) try1;  #for different output file name

set val(cwmin) 0;  #Contention Window (mininum)

set val(cwmax) 8;  #Contention Window (maximum)

set val(num) 250;  #number of nodes

set val(random) 1;  #random number for seed

set nodedist $val(nd);

set retransmission $val(retx);

set fn $val(filename);

set cwmin $val(cwmin);

set cwmax $val(cwmax);

set random $val(random);

$defaultRNG seed $random;#deterministic into Random

#=== Configure RF model parameters ========================

Antenna/OmniAntenna set Gt_ 1.0

Antenna/OmniAntenna set Gr_ 1.0

#=== Node configuration options ===========================

set val(chan) Channel/WirelessChannel;# channel type

set val(prop) Propagation/TwoRayGround;# radio-propagation model

set val(netif) Phy/WirelessPhyExt;# network interface type

set val(mac) Mac/802_11Ext;# 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(ifqlen) 20;# max packet in ifq

set val(nn) 250;#$val(num);# number of mobilenodes

set val(x) 2000;# X dimension of topography

set val(y) 200;# Y dimension of topography

set val(stop) 100;# time of simulation end

set val(rtg) DumbAgent;# routing protocol

#=== Create a ns simulator ================================

set ns_ [new Simulator]

#=== Setup topography object ==============================

set topo [new Topography]

$topo load_flatgrid $val(x) $val(y)

set god_ [create-god $val(nn)]

$god_ off

#=== Open the NS trace file ===============================

set tracefile [open out_$fn.tr w]

$ns_ use-newtrace

$ns_ trace-all $tracefile

#=== Open the NAM trace file ==============================

set namfile [open out_$fn.nam w]

$ns_ namtrace-all-wireless $namfile $val(x) $val(y)

#=== Configure the Nodes ==================================

set chan [new $val(chan)]

$ns_ node-config -adhocRouting $val(rtg)\

-llType $val(ll)\

-macType $val(mac)\

-ifqType $val(ifq)\

-ifqLen $val(ifqlen)\

-antType $val(ant)\

-propType $val(prop)\

-phyType $val(netif)\

-channel $chan\

-topoInstance $topo\

-agentTrace ON\

-routerTrace OFF\

-macTrace OFF\

-phyTrace OFF

set node_(0) [$ns_ node]

#=== Creating node objects ================================

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

set ID_($i) $i

set node_($i) [$ns_ node]

$node_($i) set id_ $ID_($i)

$node_($i) set address_ $ID_($i)

$node_($i) set X_ [expr $i * $nodedist]

$node_($i) set Y_ 50

$node_($i) set Z_ 0.0

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

}

#=== PBC Agents Definition ================================

for {set i 0} {$i<1} {incr i} {

set agent_($i) [new Agent/PBC]

$ns_ attach-agent $node_($i) $agent_($i)

$agent_($i) set payloadSize 500

$agent_($i) set periodicBroadcastInterval 0.01

$agent_($i) set periodicBroadcastVariance 0.01

$agent_($i) set modulationScheme 1

$agent_($i) singleBroadcast

#packetType (0 = safety, 1 = service)

#Safety Type packet, set the channel number to -99

$agent_($i) set channel_ -99

$agent_($i) set type_dsrc_ 0

}

for {set i 1} {$i<$val(nn)} {incr i} {

set agent_($i) [new Agent/PBC]

$ns_ attach-agent $node_($i) $agent_($i)

$agent_($i) set payloadSize 500

$agent_($i) set periodicBroadcastInterval 0.5

$agent_($i) set periodicBroadcastVariance 0.05

#$agent_($i) set modulationScheme 1

$agent_($i) Repeater ON $retransmission

#packetType (0 = safety, 1 = service)

#Safety Type packet, set the channel number to -99

$agent_($i) set channel_ -99

$agent_($i) set type_dsrc_ 0

}

#=== Define node initial position in nam ==================

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

$ns_ initial_node_pos $node_($i) 0

}

#=== Define a 'finish' procedure ==========================

proc finish {} {

global ns_ tracefile namfile

$ns_ flush-trace

close $tracefile

close $namfile

#exec nam scenario1.nam &

}

#=== Tell node to stop ====================================

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

$ns_ at $val(stop).0 "$node_($i) reset";

}

$ns_ at $val(stop) "$ns_ nam-end-wireless $val(stop)"

$ns_ at $val(stop) "finish"

$ns_ at $val(stop).0002 "puts \"End Simulation\" ; $ns_ halt"

puts "Starting Simulation..."

$ns_ run

--------------------------------------------- it shows me this errors : ---------------------------------

$ ns appendix.tcl

num_nodes is set 250

INITIALIZE THE LIST xListHead

 

    (_o4033 cmd line 1)

    invoked from within

"_o4033 cmd Repeater ON 1"

    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 "_o4033" line 2)

    (SplitObject unknown line 2)

    invoked from within

"$agent_($i) Repeater ON $retransmission"

    ("for" body line 8)

    invoked from within

"for {set i 1} {$i<$val(nn)} {incr i} {

set agent_($i) [new Agent/PBC]

$ns_ attach-agent $node_($i) $agent_($i)

$agent_($i) set payloadSize 500

$agent_..."

    (file "appendix.tcl" line 93)

[knudfl]

Hi.

Looks like it should be edited to .....

$agent_($i) set Repeater ON $retransmission

And you can try adding a "multicast" line after "set ns_ [new Simulator]"

set ns_ [new Simulator]
$ns_ multicast             #; added

....  that may bring you a bit forward in the trouble shooting.

[sadjida lebid]

thank you sir, when i edited  

$agent_($i) set Repeater ON $retransmission

it showed me this : does this mean that the simulation is working ?

$ ns appendix.tcl
num_nodes is set 250
INITIALIZE THE LIST xListHead

Starting Simulation...
channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
highestAntennaZ_ = 1.5,  distCST_ = 2090.1
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: _o17 (Agent/DumbAgent)
---------- Finished standard no-slot{} default handler ----------

thank you

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                     Lebid Sadjida 

Etudiante en Master 2 Réseaux et Télécommunications. 

Département de Télécommunication.

Faculté de Génie Electrique.

Université Djilali Liabes de Sidi Bel Abbes.

[knudfl]

Hi.

As said in my previous post,  please try editing to

set ns_ [new Simulator]
$ns_ multicast             #; added

....  that may bring you a bit forward in the trouble shooting, not a solution ... and `$ns_ multicast´  may be surplus.

* My impression is that this simulation (appendix.tcl) is too complex for a stock executable 'ns'.

.... You may have some information of the "appendix" origin.  A link, please.

[sadjida lebid]

hello sir,

yes sir when i tried it, it showed me more errors: 

$ ns appendix.tcl
num_nodes is set 250
INITIALIZE THE LIST xListHead

ns: _o5037 drop 0 -1 -1: can't read "protocols_(-1)": no such variable
    while executing
"$protocols_($iface) drop $replicator $src $dst $iface"
    (procedure "_o40" line 3)
    (mrtObject drop line 3)
    invoked from within
"[$node_ getArbiter] drop $self $src $dst $iface"
    (procedure "_o5037" line 3)
    (Classifier/Replicator/Demuxer drop line 3)
    invoked from within
"_o5037 drop 0 -1 -1"

**yes i have a pdf file (joshi.pdf) where you can find information about this code. 

thank you.

To view this discussion on the web visit https://groups.google.com/d/msgid/ns-users/3d32e7ba-4b61-4aa6-a23a-e604ae79c241n%40googlegroups.com.

[knudfl]

Hi.

Joshi.pdf = 196555289.pdf  →   https://core.ac.uk/download/pdf/196555289.pdf

Well, please consider reading APPENDIX C = ns-2.34/apps/pbc.h  → edited / new code

.... and APPENDIX D = ns-2.34/apps/pbc.cc  → new code.

Can be tricky to translate a pdf to usable C++ code.  You should also expect more issues with the tcl code.

I managed to get usable c++ code from the pdf  .... 

Package:  vanet-emergency-Joshi-3_ns234.tar https://drive.google.com/file/d/1A1VtPh6cEdHe7tAC7rUXhuLxIk0Nfpbd/view?usp=sharing

And vanet-emergency-Joshi-3_ns235.tar https://drive.google.com/file/d/1doOLqPQ_wkg4V1CN013DEq58NLyqgW0b/view?usp=sharing

Build example ...

tar xvf ns-allinone-2.35_gcc5.tar.gz
https://drive.google.com/file/d/0B7S255p3kFXNVVlxR0ZNRGVORjQ/view?usp=sharing

cd ns-allinone-2.35/

tar xvf vanet-emergency-Joshi-3_ns235.tar

./install

[sadjida lebid]

hello sir,

i tried what you told me to do but the same errors occurred 

 $ ns appendix.tcl

num_nodes is set 250
INITIALIZE THE LIST xListHead
Starting Simulation...
channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
highestAntennaZ_ = 1.5,  distCST_ = 2090.1
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: _o17 (Agent/DumbAgent)
---------- Finished standard no-slot{} default handler ----------

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[knudfl]

Hi.

This is my result with the simulation ....

$ ns235-vanet-emergency64 1-vanet-PBC.tcl

num_nodes is set 250
INITIALIZE THE LIST xListHead

can't read "debug_": no such variable
    (Object set line 1)
    invoked from within
"CMUTrace/Send set debug_"
    invoked from within
"catch "$c set $var" val"

    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 "_o4015" line 2)

    (SplitObject unknown line 2)
    invoked from within

"$agent target $sndT"
    (procedure "_o15" line 43)
    (Node/MobileNode add-target line 43)
    invoked from within
"$self add-target $agent $port"
    (procedure "_o15" line 15)
    (Node attach line 15)
    invoked from within
"$node attach $agent"
    (procedure "_o4" line 2)
    (Simulator attach-agent line 2)
    invoked from within
"$ns_ attach-agent $node_($i) $agent_($i)"
    ("for" body line 3)
    invoked from within

"for {set i 0} {$i < 1 } { incr i } {
set agent_($i) [new Agent/PBC]
$ns_ attach-agent $node_($i) $agent_($i)
$agent_($i) set payloadSize 500

$agent_($..."
    (file "1-vanet-PBC.tcl" line 129)

..... The file is a direct copy of the pdf appendix B  →  1-vanet-PBC.tcl + your settings

https://drive.google.com/file/d/1pAjnMyFZSizyk9T_Jieqic3IzdHDvhKV/view?usp=sharing

Which OS are you using ?   Name, version, architecture please. Like Ubuntu 16.04.7 - amd64.

... With the right OS installed to a hard disk partition, you shouldn't get "Classifier::no-slot{} default handler"

https://drive.google.com/file/d/1FCjn-9fkR7tKeqClUpHsleaEdnoKRZzq/view?usp=sharing

? May be you are using a copy of the executable 'ns' without the edited PBC = vanet-emergency-Joshi-3_ns235.tar ?

... It's a good idea to use an executable "ns-new-name".  Not ~all ns executable´s can be named 'ns'.

[sadjida lebid]

hello sir,

i did change the codes ns-allinone-2.35/ns2.35/apps/pbc.cc nd pbc.cc with the ones in the appendix C and D.

i'm not using ubuntu cause i couldn't install it on my pc

so i'm using virtual machine virtual box 6.1.8. fedora 12 =>>

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[knudfl]

Hi.

Fedora 12 is one of the best ns2 friendly OS, so perfect !

( Is just so that most students are using the worst possible for ns2 :   Ubuntu.)

Is your OS 32 or 64bit  ?   →  $ uname -m

May be you got created a better copy of  { pbc.cc, pbc.h } ?

The new executable `ns235-vanet-emergency64´ starts with an identical error from the default PBC examples:

$ ./ns235-vanet-emergency64 broadcast_validation.tcl
num_nodes is set 200

INITIALIZE THE LIST xListHead
can't read "debug_": no such variable

$ ./ns235-vanet-emergency64 unicast_validation.tcl  
num_nodes is set 3

INITIALIZE THE LIST xListHead
can't read "debug_": no such variable

............ The two examples are  ns-2.35/ex/802.11/{broadcast_validation.tcl  unicast_validation.tcl}.

Can you please attach / upload your { pbc.cc, pbc.h }.  Then I will test with Fedora 12 or similar.

[sadjida lebid]

hello sir, 

it is 64bits,

i didn't understand sir, i also had struggles in copying files from fedora to windows. I can't copy paste files now either texts . What should i do? any solution please ! 

i uploaded the original files (old) that were in ns-2.35 first  and the new ones (from the appendix)

thank you.

To view this discussion on the web visit https://groups.google.com/d/msgid/ns-users/215a5f0a-d167-49b0-82d1-50f6d4fbf16bn%40googlegroups.com.

[knudfl]

Hi.

Don't know where you got those "-old " files. Don't seem to look like any known file.

Besides that, there is no code difference from your {pbc.cc, pbc.h} to my `vanet-emergency-Joshi-3_ns235.tar´.

Ref. ns2-INFO: Both VirtualBox and wmWare have resulted in poor unusable 'ns' executable since 2017.

So either you have a "VirtualBox error" or you are using a wrong copy of the executable 'ns' to get "Classifier::no-slot{} default handler".

Safe method is to use a new name for the new 'ns'

tar xvf ns-allinone-2.35_gcc5.tar.gz
https://drive.google.com/file/d/0B7S255p3kFXNVVlxR0ZNRGVORjQ/view?usp=sharing

cd ns-allinone-2.35/

tar xvf vanet-emergency-Joshi-3_ns235.tar

./install

cd ns-2.35/

cp ns ns235-emergency                 ### or any new name by your choice

# cp ns235-emergency /usr/local/bin/

------- Simulation --------

ns235-emergency  file.tcl

Please read ns2-INFO again https://drive.google.com/file/d/1FCjn-9fkR7tKeqClUpHsleaEdnoKRZzq/view?usp=sharing

I.e. if you have multiple 'ns' save them to usr/local/bin/[ns-any-name]

About the simulation (appendix C) :  Some  PBC settings are missing, ref. https://dsn.tm.kit.edu/medien/downloads_old/Documentation-NS-2-80211Ext-2008-02-22.pdf

.... The simulation also handles nix routing .... so I added this after  `set ns_ [new Simulator]´ :

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

# ---------------------------------------------------------
# ---------------------------------------------------------
Agent/PBC set payloadSize 200 ; #(in bytes)
Agent/PBC set periodicBroadcastInterval 0.1          ;# (in seconds)
Agent/PBC set periodicBroadcastVariance 0.1        ;# (in seconds)
Agent/PBC set modulationScheme 0        ; # the default modulation scheme for data is BPSK
Simulator set nix-routing 0
$ns_ set-nix-routing
# ---------------------------------------
# ---------------------------------------

So know the simulation has an issue with nix routing.