Skip to main content

Printing Routing Table in AODV: NS2

There are no automatic provisioning to print a routing table for a given node in ns2. However, using the tracefile generated using ns2, routing table can be printed, but one should be good enough in processing a file using awk, python or any other scripts.

The following code will make you print the routing table when you are using AODV Protocol.

Files to be modified:
~ns-2.35/aodv/aodv.h
~ns-2.35/aodv/aodv.cc

The RED colored code indicates the addition of these lines in to the existing codes.

The following line can be added to the aodv.h file inside the class AODV in the protected scope.  probably add the line after the rt_down() function.

void rt_print(nsaddr_t nodeid);

In the aodv.cc file, add the following entry anywhere, but probably after the end of rt_down() function. 
void  AODV::rt_print(nsaddr_t nodeid) {
FILE *fp;
fp = fopen("route_table.txt", "a");
aodv_rt_entry *rt;
for (rt=rtable.head();rt; rt = rt->rt_link.le_next) {
fprintf(fp, "NODE: %i %f %i %i %i %i %i %f %d \n", nodeid, CURRENT_TIME, rt->rt_dst, rt->rt_nexthop, rt->rt_hops, rt->rt_seqno, rt->rt_expire, rt->rt_flags);
}
fclose(fp);
}

The above function records the routing table entry in to a file called route_table.txt. 
The above code 
  • creates a file pointer inturn a file called route_table.txt under append mode.
  • it creates an pointer to routing table entry. 
  • processes from the head of the queue to the last and print these information to the file with pointer fp and 
  • finally close the file pointer. 
Finally the rt_print() function have to be called. This can be called from anywhere. Here is the function call in aodv.cc file. 
It is inside the void AODV::recvReply(Packet *p) {

if (ih->daddr() == index) { // If I am the original source
  // Update the route discovery latency statistics
  // rp->rp_timestamp is the time of request origination
    rt_print(index); // print this nodes whole routing table
    rt->rt_disc_latency[(unsigned char)rt->hist_indx] = (CURRENT_TIME - rp->rp_timestamp)
                                         / (double) rp->rp_hop_count;
    // increment indx for next time
    rt->hist_indx = (rt->hist_indx + 1) % MAX_HISTORY;
  } 

Once the above steps are done.  Open the terminal and go to the ~ns-2.35. folder and type the following commands one by one
prompt$] make
Once the compilation is successful, test any of the wireless tcl files with AODV protocol is the routing and run it using ns filename.tcl
If you need a testing file, download here
Here is the sample screenshot of the routing table
routing table
Print Routing Table in AODV

This post is taken and modified from www.elmurod.net
T S Pradeep Kumar

Comments

  1. I am following the procedure as above.. but I am not getting any output .. this code has debugged successfully but not getting txt file in output..

    ReplyDelete
  2. it is worked to me. thank ! how can print the distance from source to destination in the route table?

    ReplyDelete

Post a Comment

Popular posts from this blog

Installation of NS2 (ns-2.35) in Ubuntu 20.04

Installation of NS2 (ns-2.35) in Ubuntu 20.04 LTS Step 1: Install the basic libraries like      $] sudo apt install build-essential autoconf automake libxmu-dev Step 2: install gcc-4.8 and g++-4.8 open the file using sudo mode $] sudo nano /etc/apt/sources.list Include the following line deb http://in.archive.ubuntu.com/ubuntu bionic main universe $] sudo apt update $] sudo apt install gcc-4.8 g++-4.8 Step 3:  Unzip the ns2 packages to home folder $] tar zxvf ns-allinone-2.35.tar.gz $] cd ns-allinone-2.35/ns-2.35 Modify the following make files. ~ns-2.35/Makefile.in Change @CC@ to gcc-4.8 change @CXX@ to g++-4.8 ~nam-1.15/Makefile.in ~xgraph-12.2/Makefile.in ~otcl-1.14/Makefile.in Change in all places  @CC@ to gcc-4.8 @CPP@ or @CXX@ to g++-4.8 open the file: ~ns-2.35/linkstate/ls.h Change at the Line no 137  void eraseAll() { erase(baseMap::begin(), baseMap::end()); } to This void eraseAll() { this->erase(baseMap::begin(), baseMap::end()); } All changes made Step 4: Open a new termi

Installing ns-3.34 in Ubuntu 20.04

This post shows how to install ns 3.34 in Ubuntu 20.04 LTS Prerequisites: Fresh installation of Ubuntu Version 20.04 LTS  ns3.34 can be downloaded from here Follow the video link for complete step by step instructions on the installation.  This version fixes the compilation issues of vanet-routing-compare.cc (bug in ns3.33)  Issue the following commands after opening a terminal  $ sudo apt update $ sudo apt install g++ python3 python3-dev python-dev pkg-config sqlite3 python3-setuptools git qt5-default gir1.2-goocanvas-2.0 python3-gi python3-gi-cairo python3-pygraphviz gir1.2-gtk-3.0 ipython3 openmpi-bin openmpi-common openmpi-doc libopenmpi-dev autoconf cvs bzr unrar openmpi-bin openmpi-common openmpi-doc libopenmpi-dev tcpdump wireshark libxml2 libxml2-dev Unzip or untar the ns-allinone-3.34.tar.bz2 in the home folder (in my case its /home/pradeepkumar) $ cd ns-allinone-3.34/ $ ./build.py --enable-examples --enable-tests  Once the installation is completed, you may get an output show

Installation of ns3 in Windows 10 and Windows 11 OS using WSL (Windows Subsystem for Linux)

This post shows how to install ns-3.33 in Windows 10 through WSL (Windows Subsystem for Linux) This posts works for Windows 11 also (I have tested it on a Windows 11 ISO and it works the Same way as mentioned in the following post.) This post will work for ns-3.3x version. Prerequisites : Install Windows Subsystem for Linux with GUI: Please refer the following video  System Information: OS used: Windows 10 and WSL (Ubuntu 20.04) GUI: XServer for Windows NS3 Version: ns-3.33 See the following complete video on how to install ns3 in Windows 10 Step 0 : Open XLaunch Step 1 :  Open WSL using PowerShell and open it as Administrator Command:/  wsl $ xfce4-session The GUI of Ubuntu Opens within Windows 10 OS. Step 2 : Download ns3 from nsnam.org website through Mozilla Firefox browser Step 3: Open a Terminal  $ sudo apt update $ sudo apt install build-essential autoconf automake libxmu-dev python3-pygraphviz cvs mercurial bzr git cmake p7zip-full python3-matplotlib python-tk python3-dev qt5-q