Skip to main content

Printing the Routing Table in DSDV protocol

Printing the routing table for any protocol is quite a easier task if the data structure is known. You may read the post on "printing the routing table for AODV protocol" 

Now this post will let you know how to print the routing table when using DSDV protocol. As you know, the DSDV protocol is a table driven protocol in which each node maintains a Routing table for a given source to destination and the table gets updated periodically to maintain the routes.

But AODV protocol is a on demand routing protocol that deals with Route Request, Route Reply for forming the routes. So printing the routing table takes a minor tweak. But the DSDV protocol handles the routing table as a data structure, here is the steps to do it.

OS Used : Linux Mint 17 - 64 bit
NS2 Used : ns-2.35
Files to be modified: dsdv.cc and dsdv.h

Step 1:
The folder where ns2 installed on my machine /home/pradeepkumar/ns-allinone-2.35/ns-2.35
Execute these commands to access the DSDV protocol
$prompt] cd /home/pradeepkumar/ns-allinone-2.35/ns-2.35
$prompt] cd dsdv
$prompt] ls 
This commands will list you all the files in the folder ~dsdv/
Now open the files dsdv.cc and dsdv.h

Step 2: dsdv.h 
We will be printing the routing table in a file called dsdv.txt
include this line in the class DSDV_Agent{....
under protected mode as given below
.........
protected:
FILE *fp;
......

Step 3: dsdv.cc

input the following line inside the constructor DSDV_Agent() as shown below

DSDV_Agent::DSDV_Agent (): Agent (PT_MESSAGE), ll_queue (0), seqno_ (0),
  myaddr_ (0), subnet_ (0), node_ (0), port_dmux_(0),
  periodic_callback_ (0), be_random_ (1),
  use_mac_ (0), verbose_ (1), trace_wst_ (0), lasttup_ (-10),
  alpha_ (0.875),  wst0_ (6), perup_ (15),
  min_update_periods_ (3) // constants
 {

fp=fopen("dsdv.txt","w");

Step 4: dsdv.cc
There is a function called updateRoute(), include the red colored line given below in to the function as shown below.

void
DSDV_Agent::updateRoute(rtable_ent *old_rte, rtable_ent *new_rte)
{
  int negvalue = -1;
  assert(new_rte);

  Time now = Scheduler::instance().clock();

  char buf[1024];
  //  snprintf (buf, 1024, "%c %.5f _%d_ (%d,%d->%d,%d->%d,%d->%d,%lf)",
  snprintf (buf, 1024, "%c %.5f _%d_ (%d,%d->%d,%d->%d,%d->%d,%f)",
   (new_rte->metric != BIG
    && (!old_rte || old_rte->metric != BIG)) ? 'D' : 'U',
   now, myaddr_, new_rte->dst,
   old_rte ? old_rte->metric : negvalue, new_rte->metric,
   old_rte ? old_rte->seqnum : negvalue,  new_rte->seqnum,
   old_rte ? old_rte->hop : -1,  new_rte->hop,
   new_rte->advertise_ok_at);
fprintf (fp, "%c %.5f _%d_ (%d,%d->%d,%d->%d,%d->%d,%f)\n",
   (new_rte->metric != BIG 
    && (!old_rte || old_rte->metric != BIG)) ? 'D' : 'U', 
   now, myaddr_, new_rte->dst, 
   old_rte ? old_rte->metric : negvalue, new_rte->metric, 
   old_rte ? old_rte->seqnum : negvalue,  new_rte->seqnum,
   old_rte ? old_rte->hop : -1,  new_rte->hop, 
   new_rte->advertise_ok_at);

  table_->AddEntry (*new_rte);
fprintf(fp,"(%d),Route table updated..\n",myaddr_);
fprintf (fp,"VWST %.12lf frm %d to %d wst %.12lf nxthp %d [of %d]\n",now, myaddr_, new_rte->dst, new_rte->wst, new_rte->hop, new_rte->metric);

  if (trace_wst_)
    trace ("VWST %.12lf frm %d to %d wst %.12lf nxthp %d [of %d]",
  now, myaddr_, new_rte->dst, new_rte->wst, new_rte->hop,
  new_rte->metric);
  if (verbose_)
    trace ("VS%s", buf);
}

Step 4: compile and make
Execute the following steps one by one
$prompt] cd /home/pradeepkumar/ns-allinone-2.35/ns-2.35
$prompt] make
if there is no error, execute any tcl file that has the dsdv protocol as the routing protocol and run it  using ns filename.tcl
here is a sample output of the pradeep.txt file

D 0.03011 _0_ (1,-1->1,-1->4,-1->1,12.030111)
(0),Route table updated..
VWST 0.030110562161 frm 0 to 1 wst 6.000000000000 nxthp 1 [of 1]
D 12.95121 _0_ (1,1->1,4->6,1->1,23.451213)
(0),Route table updated..
VWST 12.951212565148 frm 0 to 1 wst 5.250000000000 nxthp 1 [of 1]
D 25.24463 _0_ (1,1->1,6->8,1->1,34.432132)
(0),Route table updated..
VWST 25.244631607088 frm 0 to 1 wst 4.593750000000 nxthp 1 [of 1]

Here is the screenshot of the simulation
DSDV Routing table
DSDV Routing table
If you are unsure how to do it, you may send your email address through the comment section or contact page to receive these files. 

T S Pradeep Kumar 

Comments

Popular posts from this blog

Routing in VANETs using ns3

Part 1
WAVE - Wireless Access for Vehicular environments. vanet-routing-compare.cc It might take more than an hour. The readers are requested to be patient. SUMO, VANETs, routing comparison 1. Explain the full source code (1550 lines of code) 2. Creating a real scenario using osm (Open Street Map Web Wizard) 3. Performance analysis for various vanet protocols. https://www.nsnam.com Location of the source code /home/pradeepkumar/ns-allinone-3.27/ns-3.27/src/wave/examples
Move this file to the scratch/ for inclusion of all modules. Step 1: Explanation of source code. Copy the file to scratch folder. This is just Part 1 of the VANET comparison

Part 2 Please watch the First Part before watching this video   https://www.youtube.com/watch?v=IJYeIpUqjQI&t=850s
Part 2 - Analysis of the results.
Please go through the first video (Part 1) and then watch this video (PArt 2)
#VANETs #NS3 #Routing
1. SUMO for web traffic (osmWebWizard.py) 2. Convert this into mobility.tcl file and t…

ns3 installation in Ubuntu 16.04

This post serves the installation instructions of ns3 in ubuntu 16.04 version. Some of my students are working in ns3, this post will benefit them in installing ns3.

OS Used: Ubuntu 16.04.4
ns3 version: ns3 version 3.27

The same procedure will be applied for OS like Debian, Linux Mint.

Fresh installation of Ubuntu 16.04 Let you try the fresh installation of ubuntu in your hard disk along with windows.
Installation of ns3 dependencies ns3 needs so many dependencies, developmental libraries, drivers, etc. so install all those
$] sudo apt update  $] sudo apt upgrade
$] sudo apt-get install build-essential autoconf automake libxmu-dev python-pygoocanvas python-pygraphviz cvs mercurial bzr git cmake p7zip-full python-matplotlib python-tk python-dev python-kiwi python-gnome2 python-gnome2-desktop-dev python-rsvg qt4-dev-tools qt4-qmake qt4-qmake qt4-default gnuplot-x11 wireshark
The above command make take some time to download, compile and install it, Be Patient. 
Installing ns3 Download the…

TORA Protocol in NS-2.35 (NS2)

This post tells you how to enable the TORA (Temporally ordered routing Algorithm) protocol in Network Simulator 2 (ns-2.35)

TORA is a protocol in wireless adhoc networks that works with timing parameters. NS-2.35 comes with the TORA protocol by default but it has to be tweaked manually to make it run.
This post will help you to do that.

You can watch this video for detailed instructions:


Step 1: Generate a Scenario for TORA protoco using NS2 Scenario Generator NSG Software.
We have created a tcl file using NSG2.1.jar

$] java -jar NSG2.1.jar

Three files have to be modified
~ns-2.35/tora/tora.cc~ns-2.35/tora/tora.h~ns-2.35/imep/imep.cc There are various websites that tells you how to configure TORA by making changes to the above three files.  Change 1: tora.h In the tora.h file, go to the end of the File before the agent completes, include these two lines

#include <classifier/classifier-port.h>
protected: PortClassifier *dmux_;

Change 2: tora.cc Open the tora.cc and include the follow…