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packetStructure.py
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packetStructure.py
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import socket
import numpy as np
#defines properties of a packet
class Packet:
def __init__(self,fields):
if fields == None:
self.source = None
self.dest = None
self.timestamp = None
self.size = 0
self.key = None
else:
self.source = socket.inet_aton(fields[0])
self.dest = socket.inet_aton(fields[1])
self.timestamp = float(fields[2])
self.size = int(fields[3])
if self.source < self.dest:
self.key = self.source + self.dest
else:
self.key = self.dest + self.source
class Flow:
#constructor of default flow
def __init__(self,firstpacket):
if firstpacket == None:
self.ip1 = None
self.ip2 = None
self.key = None
self.n_packet1 = 0
self.n_byte1 = []
self.t_start1 = 0
self.t_end1 = 0
self.t_interarrival1 = []
self.n_packet2 = 0
self.n_byte2 = []
self.t_start2 = 0
self.t_end2 = 0
self.t_interarrival2 = []
else:
if firstpacket.source < firstpacket.dest:
self.ip1 = firstpacket.source
self.ip2 = firstpacket.dest
self.n_packet1 = 1
self.n_byte1 = [firstpacket.size]
self.t_start1 = firstpacket.timestamp
self.t_end1 = firstpacket.timestamp
self.t_interarrival1 = []
self.n_packet2 = 0
self.n_byte2 = []
self.t_start2 = 0
self.t_end2 = 0
self.t_interarrival2 = []
else:
self.ip1 = firstpacket.dest
self.ip2 = firstpacket.source
self.n_packet1 = 0
self.n_byte1 = []
self.t_start1 = 0
self.t_end1 = 0
self.t_interarrival1 = []
self.n_packet2 = 1
self.n_byte2 = [firstpacket.size]
self.t_start2 = firstpacket.timestamp
self.t_end2 = firstpacket.timestamp
self.t_interarrival2 = []
self.key = firstpacket.key
#add a packet to the current flow (by changing volume and duration)
def addPacket(self,packet):
if packet.source == self.ip1 and packet.dest == self.ip2:
#initialize flow if not initialized
if self.n_packet1 == 0:
self.t_start1 = packet.timestamp
self.t_end1 = packet.timestamp
self.n_packet1 += 1
self.n_byte1.append(packet.size)
return
if self.t_end1 < packet.timestamp:
self.t_interarrival1.append(packet.timestamp-self.t_end1)
self.t_end1 = packet.timestamp
elif self.t_start1 > packet.timestamp:
self.t_interarrival1.append(self.t_start1-packet.timestamp)
self.t_start1 = packet.timestamp
self.n_packet1 += 1
self.n_byte1.append(packet.size)
elif packet.source == self.ip2 and packet.dest == self.ip1:
#initialize flow if not initialized
if self.n_packet2 == 0:
self.t_start2 = packet.timestamp
self.t_end2 = packet.timestamp
self.n_packet2 += 1
self.n_byte2.append(packet.size)
return
if self.t_end2 < packet.timestamp:
self.t_interarrival2.append(packet.timestamp-self.t_end2)
self.t_end2 = packet.timestamp
elif self.t_start2 > packet.timestamp:
self.t_interarrival2.append(self.t_start2-packet.timestamp)
self.t_start2 = packet.timestamp
self.n_packet2 += 1
self.n_byte2.append(packet.size)
else:
raise Exception('packet does not belong to flow')
def getDurationInSeconds(self):
return self.getEnd() - self.getStart()
def getInterArrivaltime(self):
combined = (self.t_interarrival1+self.t_interarrival2).sort()
if len(combined) > 0:
return combined[len(combined)/2]
return 0
def getInterArrivaltime1(self):
self.t_interarrival1.sort()
if len(self.t_interarrival1) > 0:
return self.t_interarrival1[len(self.t_interarrival1)/2]
return 0
def getInterArrivalvar1(self):
a = np.var(self.t_interarrival1)
if np.isnan(a):
return 0
return a
def getInterArrivaltime2(self):
self.t_interarrival2.sort()
if len(self.t_interarrival2) > 0:
return self.t_interarrival2[len(self.t_interarrival2)/2]
return 0
def getInterArrivalvar2(self):
a = np.var(self.t_interarrival2)
if np.isnan(a):
return 0
return a
def getNoOfBytes(self):
return sum(sum(self.n_byte1),sum(self.n_byte2))
def getVarOfBytes1(self):
a = np.var(self.n_byte1)
if np.isnan(a):
return 0
return a
def getVarOfBytes2(self):
a = np.var(self.n_byte2)
if np.isnan(a):
return 0
return a
def getNoOfPackets(self):
return self.n_packet1 + self.n_packet2
def getStart(self):
temp = min(self.t_start1, self.t_start2)
if temp == 0:
return self.t_start1 + self.t_start2
else:
return temp
def getEnd(self):
return max(self.t_end1, self.t_end2)