Wednesday, 26 June 2013

blackhole attack

Workshop on Cyber Security and Forensics (16th to 20th August 2016) 

Workshop on Big Data Analytics (2nd to 6th August 2016)

Rushing attacks-(3/01/2014) 
NS2 code for Rushing attacks

Blackhole attack:

 In this attack, adversary node drops all the packets passed through it. In order to do this, the adversary node attracts the neighbor node with false route reply with less hop count and greater sequence number. Once, route is established through that node then the neighbor node starts sending packets and eventually all packets will be dropped at adversary. Many wireless routing protocols such as AODV, DSR, HWMP, DSDV etc. are vulnerable to Blackhole attack.

Blackhole attack implementation in AODV routing protocol  

The following scenario consists of 25 nodes, in which 1,7 and 13 nodes are blackhole nodes and other nodes are non-malicious.

    To create multiple blackhole  attackers in AODV protocol
i)             In aodv.h the following blue colour lines needs to be added to define balckhole attackers
      * History management
double               PerHopTime(aodv_rt_entry *rt);

nsaddr_t malicious;

ii)            In the following blue colour lines needs to be added to initialize the attackers
AODV::command(intargc, const char*const* argv) {
if(argc == 2) {
Tcl&tcl = Tcl::instance();

if(strncasecmp(argv[1], "id", 2) == 0) {
tcl.resultf("%d", index);
return TCL_OK;
                   if(strncasecmp(argv[1], "blackhole", 9) == 0) {
   return TCL_OK;

AODV::AODV(nsaddr_t id) : Agent(PT_AODV),
btimer(this), htimer(this), ntimer(this),
rtimer(this), lrtimer(this), rqueue() {
index = id;
seqno = 2;
bid = 1;

   Malicious nodes 1,7 and 13 generates fake route replies using following blue colour code

//add in receive route request

if(rq->rq_dst == index) {

#ifdef DEBUG
fprintf(stderr, "%d - %s: destination sending reply\n",
index, __FUNCTION__);
#endif // DEBUG

   // Just to be safe, I use the max. Somebody may have
   // incremented the dstseqno.
seqno = max(seqno, rq->rq_dst_seqno)+1;
if (seqno%2) seqno++;

sendReply(rq->rq_src,           // IP Destination
             1,                    // Hop Count
index,                // Dest IP Address
seqno,                // Dest Sequence Num
             MY_ROUTE_TIMEOUT,     // Lifetime
rq->rq_timestamp);    // timestamp

 //blackhole attackers

else if(malicious==1000)
seqno = max(seqno, rq->rq_dst_seqno)+1;
if (seqno%2) seqno++;

sendReply(rq->rq_src,           // IP Destination
             1,                    // Hop Count
rq->rq_timestamp);    // timestamp

Since, all attackers do not have route to destination, attackers have to disable the send (error).

The following blue colour code disables the send (error) 

 // add in route resolve function (AODV::rt_resolve(Packet *p) )
else {
 Packet *rerr = Packet::alloc();
structhdr_aodv_error *re = HDR_AODV_ERROR(rerr);
  * For now, drop the packet and send error upstream.
  * Now the route errors are broadcast to upstream
  * neighbors - Mahesh 09/11/99

assert (rt->rt_flags == RTF_DOWN);
re->DestCount = 0;
re->unreachable_dst[re->DestCount] = rt->rt_dst;
re->unreachable_dst_seqno[re->DestCount] = rt->rt_seqno;
re->DestCount += 1;
#ifdef DEBUG
fprintf(stderr, "%s: sending RERR...\n", __FUNCTION__);
sendError(rerr, false);


After replacing original and aodv.h files,
 first perform  $make clean  operation in  ns-allinone-2.xx\ns-2.xx folder then

iii)    To define the blackhole attackers in tcl add these lines after node initialization

$ns at 0.0 "[$n1 set ragent_] blackhole1"
$ns at 0.0 "[$n7 set ragent_] blackhole2"
$ns at 0.0 "[$n13 set ragent_] blackhole3"

  Above scenario example tcl  file blackhole attacks scenario

Goodput calculation file goodput

 To calculate goodput:  type-> perl outputfile name  granularity(for 1 or 2... n seconds) > filename
 eg $ perl 10 > results   

Packet Delivery Ratio (pdr) file: pdr

To calculate Packet Delivery Ratio:
$ perl trafile_name sour-node1 sour_node2 sour_node3 sour_node4 dest_node >fname

eg :

 $perl _20_ _21_ _11_ _17_ _18_  > result

all files in zip format : all files