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//This file outputs a ns file for a dumbell network to be used for
//DDOS experiments.
/*the input file is a script file which is read by the program to get
the parameters of the network.
A typical file example
d (diameter of the network) H (hurtz parameter)
n1 (no of incoming TCP nodes) rate (rate)
n2 (no. of DDOS attackers in the subtree) master (0/1) rate (rate)
*/
#include<stdio.h>
#include<stdlib.h>
#include "dosdbell.h"
void set_Topology(FILE *filer);
void TCL_Write_Initial(FILE *);
void TCL_Write_Nodes(FILE *);
void TCL_Write_Connections(FILE*);
void TCL_Write_Agents(FILE *);
void TCL_Write_DDOS_Agent(FILE*);
void TCL_Write_Final(FILE*);
struct Topology topo;
int diameter;
double TCP_start_time;
double DDOS_start_time;
double finish_time;
double bw;
int pack_size;
float bn_delay;
float bn_bw ;
main(int argc, char **argv){
FILE *filer;
if(argc !=3){
printf("USAGE: %s parameter_filename tcloutput_filename\n",argv[0]);
exit(0);
}
else{
filer = fopen(argv[1],"r");
set_Topology(filer);
fclose(filer);
filer = fopen(argv[2],"w");
TCL_Write_Initial(filer);
TCL_Write_Nodes(filer);
TCL_Write_Connections(filer);
TCL_Write_Agents(filer);
TCL_Write_DDOS_Agent(filer);
TCL_Write_Final(filer);
fclose(filer);
}
}
void set_Topology(FILE *filer){
double perT, perFTP, perCBR, perV;
int i;
double H;
double rnd;
int attackNo,master;
double DDOSRate;
double hop;
fscanf(filer,"%d %f %f\n",&diameter,&bn_bw,&bn_delay);
fscanf(filer,"%d %lf %lf\n",&topo.TCPNodes.NoNodes,&bw,&TCP_start_time);
topo.TCPNodes.TCPNode = (struct TCP_Node_Info *)malloc(topo.TCPNodes.NoNodes*sizeof(struct TCP_Node_Info));
for(i=0;i<topo.TCPNodes.NoNodes;i++){
/* Based on the topology, get the number of hops from the source to destination.
Since a dumbbell has a minimum of three hops, the number of hops returned
should be greater than 3
*/
do{
topo.TCPNodes.TCPNode[i].delayFrom = (double) Inet_default_no_hops(diameter);
}while(topo.TCPNodes.TCPNode[i].delayFrom<=3);
/* Calculate the delay in for both the links */
topo.TCPNodes.TCPNode[i].delayTo = ceil(drand48()*(topo.TCPNodes.TCPNode[i].delayFrom-2));
topo.TCPNodes.TCPNode[i].delayFrom -= topo.TCPNodes.TCPNode[i].delayTo;
// Maximum delay between the start of all sources
rnd = ((double)(drand48()*TCP_start_time));
topo.TCPNodes.TCPNode[i].startTime = rnd;
}
fscanf(filer,"%d %lf %d %d %lf\n",&topo.CBRTraffic.NoAttackers,&topo.CBRTraffic.DDOSRate,&pack_size,&master,&DDOS_start_time);
CBRTrafficInet(diameter,topo.CBRTraffic.NoAttackers, master, topo.CBRTraffic.DDOSRate, &topo.CBRTraffic.DDOSTraffic);
if(master==0)
topo.CBRTraffic.master = NoMaster;
else
topo.CBRTraffic.master = Master;
topo.CBRTraffic.MaxTime = topo.CBRTraffic.DDOSTraffic.Events[topo.CBRTraffic.DDOSTraffic.NoEvents-1].delay;
fscanf(filer,"%lf\n",&finish_time);
printf("Topology Generated Using:\n Diameter=%d BottleNeck: BW=%.3fMbps Delay=%.3fms\n \
Background Traffic: TCP Nodes=%d BW=%.3lfMbps Starttime=%.1lfs\n \
Dos Traffic : Attacker= %d BW=%.3lfMbps Starttime=%.1lfs\n \
PacketSize=%dB Master = %d Finishtime = %.1lfs\n", \
diameter,bn_bw,bn_delay,topo.TCPNodes.NoNodes,bw,TCP_start_time, \
topo.CBRTraffic.NoAttackers, \
topo.CBRTraffic.DDOSRate, DDOS_start_time,pack_size,master,finish_time);
}
void TCL_Write_Initial(FILE *filew){
fprintf(filew, "set ns [new Simulator]\n\n\n");
/* Incase we need nam support */
//fprintf(filew, "set nf [open out.nam w]\n");
//fprintf(filew, "$ns namtrace-all $nf\n\n\n");
//fprintf(filew, "proc finish {} { \n global ns nf \n $ns flush-trace \n close $nf \n exec nam out.nam & \n exit 0 \n }\n\n\n");
/***till here***/
fprintf(filew, "proc finish {} {\n exit 0 \n }\n\n\n");
}
void TCL_Write_Nodes(FILE *filew){
fprintf(filew, "for {set i 0} {$i < %d} {incr i} { \n set TCPSend($i) [$ns node] \n }\n\n",topo.TCPNodes.NoNodes);
fprintf(filew, "for {set i 0} {$i < %d} {incr i} { \n set TCPRecv($i) [$ns node] \n }\n\n",topo.TCPNodes.NoNodes);
fprintf(filew,"set BotLeft [$ns node] \n");
fprintf(filew,"set BotRight [$ns node] \n");
fprintf(filew,"set DDOSNode [$ns node] \n");
fprintf(filew,"set Victim [$ns node] \n");
fprintf(filew,"\n\n");
}
void TCL_Write_Connections(FILE *filew){
int i;
for(i=0;i<topo.TCPNodes.NoNodes;i++){
fprintf(filew,"$ns duplex-link $TCPSend(%d) $BotLeft %.3lfMb %.3lfms DropTail\n",i,bw,topo.TCPNodes.TCPNode[i].delayTo*bn_delay);
fprintf(filew,"$ns duplex-link $TCPRecv(%d) $BotRight %.3lfMb %.3lfms DropTail\n",i,bw,topo.TCPNodes.TCPNode[i].delayFrom*bn_delay);
}
fprintf(filew,"\n\n");
fprintf(filew,"$ns duplex-link $BotLeft $BotRight %.3lfMb %.3lfms DropTail\n",bn_bw,bn_delay);
fprintf(filew,"$ns duplex-link $BotLeft $DDOSNode %.3lfMb %.3lfms DropTail\n",10*bn_bw,bn_delay);
fprintf(filew,"$ns duplex-link $BotRight $Victim %.3lfMb %.3lfms DropTail\n",10*bn_bw,bn_delay);
fprintf(filew,"\n\n");
}
void TCL_Write_Agents(FILE *filew){
int i;
double time;
fprintf(filew, "for {set i 0} {$i < %d} {incr i} { \n \
set TCPSendAg($i) [new Agent/TCP] \n \
$ns attach-agent $TCPSend($i) $TCPSendAg($i) \n \
set TCPSendTraffic($i) [new Application/FTP] \n \
$TCPSendTraffic($i) attach-agent $TCPSendAg($i) \n \
set TCPRecvAg($i) [new Agent/TCPSink] \n \
$ns attach-agent $TCPRecv($i) $TCPRecvAg($i) \n \
$ns connect $TCPSendAg($i) $TCPRecvAg($i) \n \
$TCPSendAg($i) set class_ 1 \n}\n\n",topo.TCPNodes.NoNodes);
fprintf(filew,"\n\n\n");
for(i=0;i<topo.TCPNodes.NoNodes;i++){
fprintf(filew,"$ns at %lf \"$TCPSendTraffic(%d) start\"\n",topo.TCPNodes.TCPNode[i].startTime,i);
}
fprintf(filew,"\n\n");
}
void TCL_Write_DDOS_Agent(FILE* filew){
int i;
fprintf(filew,"\n\n");
fprintf(filew,"set DDOSUDP [new Agent/UDP]\n");
fprintf(filew,"$ns attach-agent $DDOSNode $DDOSUDP\n");
fprintf(filew,"set DDOSTraffic [new Application/Traffic/CBR]\n");
fprintf(filew,"$DDOSTraffic attach-agent $DDOSUDP\n");
fprintf(filew,"set VictimAgent [new Agent/Null]\n");
fprintf(filew,"$ns attach-agent $Victim $VictimAgent\n");
fprintf(filew,"$ns connect $DDOSUDP $VictimAgent\n");
fprintf(filew,"$DDOSUDP set class_ 2\n");
fprintf(filew,"\n\n\n");
DDOS_start_time*=1000;
fprintf(filew,"$ns at %lf \"$DDOSTraffic set rate_ %lfMb \"\n",ceil(DDOS_start_time+topo.CBRTraffic.DDOSTraffic.Events[0].delay*bn_delay)/1000, \
topo.CBRTraffic.DDOSTraffic.Events[0].NetCBR);
fprintf(filew,"$ns at %lf \"$DDOSTraffic set packet_size_ %d \"\n",\
ceil(DDOS_start_time+topo.CBRTraffic.DDOSTraffic.Events[0].delay*bn_delay)/1000,pack_size);
fprintf(filew,"$ns at %lf \"$DDOSTraffic start\"\n",ceil(DDOS_start_time+topo.CBRTraffic.DDOSTraffic.Events[0].delay*bn_delay)/1000);
for(i=1;i<topo.CBRTraffic.DDOSTraffic.NoEvents;i++){
fprintf(filew,"$ns at %lf \"$DDOSTraffic set rate_ %lfMb\"\n",\
ceil(DDOS_start_time+topo.CBRTraffic.DDOSTraffic.Events[i].delay*bn_delay)/1000,
topo.CBRTraffic.DDOSTraffic.Events[i].NetCBR);
}
fprintf(filew,"\n\n");
}
void TCL_Write_Final(FILE *filew){
fprintf(filew,"\n\n");
fprintf(filew,"set outfile [open qtrace.tr w]\n$ns trace-queue $BotLeft $BotRight $outfile\n\n\n");
fprintf(filew,"$ns at %lf \"finish\"\n",finish_time);
fprintf(filew, "$ns run\n");
}
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