Explainable Security in SDN-Based IoT Networks

. 2020 Dec 20;20(24):7326. doi: 10.3390/s20247326

Algorithm 3 Calculation of common statistics and features

procedureCalculate_Common( $L_{E}$ )
C← Common statistics
$s r c I p S e t$ ← Create source IP HashSet
$d s t I p S e t$ ← Create destination IP HashSet
$p o r t S e t$ ← Create destination port HashSet
$L_{D}$ ← Create duration List
$t o t a l P a c k e t C n t$ ← 0
for all E in $L_{E}$ do
$p k t s$ ←E.getPacketCount()
$t o t a l P a c k e t C n t$ ← $t o t a l P a c k e t C n t$ + $p k t s$
$b y t e s$ ←E.getByteCount()
$L_{D}$ .add(E.getDuration())
$s r c I P$ ←E.getSourceIp()
$s r c I p S e t$ .add( $s r c I P$ )
$d s t I P$ ←E.getDestinationIp()
$d s t I p S e t$ .add( $d s t I P$ )
$p r o t o_n u m b e r$ ←E.getInternetProtocolNumber()
if $p r o t o_n u m b e r$ is TCP or UDP then
$s r c P o r t$ ←E.getSourcePort()
$d s t P o r t$ ←E.getDestinationPort()
$k e y$ ← srcIP + srcPort + dstIP + dstPort
$C . h a s h M a p$ .put(key,bytes)
else if $p r o t o_n u m b e r$ is ICMP then
$k e y$ ← srcIP + dstIP
$C . h a s h M a p$ .put(key,bytes)
end if
end for
$C . t n P_P S r c I p$ ← $t o t a l P a c k e t C n t / s r c I p S e t . s i z e ()$
$C . t n P_P D s t I p$ ← $t o t a l P a c k e t C n t / d s t I p S e t . s i z e ()$
$C . t n P_P e r_D P o r t$ ← $t o t a l P a c k e t C n t / p o r t S e t . s i z e ()$
$C . m e a n$ ← mean of $L_{D}$
$C . s t d d e v$ ← standard deviation of $L_{D}$
$C . s u m$ ← summation of $L_{D}$
return C
end procedure