import logging
# Aidmar
import math
from random import randint, uniform
from scipy.stats._discrete_distns import randint_gen
from threading import _MainThread
from lea import Lea
from scipy.stats import gamma
from Attack import BaseAttack
from Attack.AttackParameters import Parameter as Param
from Attack.AttackParameters import ParameterTypes
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
# noinspection PyPep8
from scapy.layers.inet import IP, Ether, TCP, RandShort
from collections import deque
class DDoSAttack(BaseAttack.BaseAttack):
def __init__(self, statistics, pcap_file_path):
"""
Creates a new instance of the DDoS attack.
:param statistics: A reference to the statistics class.
"""
# Initialize attack
super(DDoSAttack, self).__init__(statistics, "DDoS Attack", "Injects a DDoS attack'",
"Resource Exhaustion")
# Define allowed parameters and their type
self.supported_params = {
Param.IP_SOURCE: ParameterTypes.TYPE_IP_ADDRESS,
Param.MAC_SOURCE: ParameterTypes.TYPE_MAC_ADDRESS,
Param.PORT_SOURCE: ParameterTypes.TYPE_PORT,
Param.IP_DESTINATION: ParameterTypes.TYPE_IP_ADDRESS,
Param.MAC_DESTINATION: ParameterTypes.TYPE_MAC_ADDRESS,
Param.PORT_DESTINATION: ParameterTypes.TYPE_PORT,
Param.INJECT_AT_TIMESTAMP: ParameterTypes.TYPE_FLOAT,
Param.INJECT_AFTER_PACKET: ParameterTypes.TYPE_PACKET_POSITION,
Param.PACKETS_PER_SECOND: ParameterTypes.TYPE_FLOAT,
Param.PACKETS_LIMIT: ParameterTypes.TYPE_INTEGER_POSITIVE,
Param.NUMBER_ATTACKERS: ParameterTypes.TYPE_INTEGER_POSITIVE
}
# PARAMETERS: initialize with default values
# (values are overwritten if user specifies them)
self.add_param_value(Param.INJECT_AFTER_PACKET, randint(0, self.statistics.get_packet_count()))
# attacker configuration
num_attackers = randint(1, 16)
self.add_param_value(Param.IP_SOURCE, self.generate_random_ipv4_address(num_attackers))
self.add_param_value(Param.MAC_SOURCE, self.generate_random_mac_address(num_attackers))
self.add_param_value(Param.PORT_SOURCE, str(RandShort()))
"""
# Aidmar - PPS = avg packet rate per host = avgPacketsSentPerHost / captureDuration
max_pkts_sent_per_host = self.statistics.process_db_query(
"SELECT MAX(pktsSent) FROM ip_statistics;")
print("\nmax_pkts_sent_per_host: %f" % (max_pkts_sent_per_host))
capture_duration = self.statistics.process_db_query(
"SELECT captureDuration FROM file_statistics;")
max_pkt_rate_per_host = max_pkts_sent_per_host/float(capture_duration)
print("\nmax_pkt_rate_per_host: %f" % (max_pkt_rate_per_host))
#num_attackers = self.get_param_value(Param.NUMBER_ATTACKERS)
# the minumum PPS is the maximum packet rate per host * attackers number
min_pps = math.floor(max_pkt_rate_per_host * int(num_attackers))
print("\nMIN PPS: %f" % (min_pps))
self.add_param_value(Param.PACKETS_PER_SECOND, randint(min_pps, 64))
"""
self.add_param_value(Param.PACKETS_PER_SECOND, randint(1, 64))
# victim configuration
random_ip_address = self.statistics.get_random_ip_address()
self.add_param_value(Param.IP_DESTINATION, random_ip_address)
destination_mac = self.statistics.get_mac_address(random_ip_address)
if isinstance(destination_mac, list) and len(destination_mac) == 0:
destination_mac = self.generate_random_mac_address()
self.add_param_value(Param.MAC_DESTINATION, destination_mac)
"""port_destination = self.statistics.process_db_query(
"SELECT portNumber FROM ip_ports WHERE portDirection='in' ORDER BY RANDOM() LIMIT 1;")
if port_destination is None:
port_destination = str(RandShort())
self.add_param_value(Param.PORT_DESTINATION, port_destination)"""
self.add_param_value(Param.PACKETS_LIMIT, randint(1000, 5000))
def generate_attack_pcap(self):
def update_timestamp(timestamp, pps, maxdelay):
"""
Calculates the next timestamp to be used based on the packet per second rate (pps) and the maximum delay.
:return: Timestamp to be used for the next packet.
"""
return timestamp + uniform(0.1 / pps, maxdelay)
def get_nth_random_element(*element_list):
"""
Returns the n-th element of every list from an arbitrary number of given lists.
For example, list1 contains IP addresses, list 2 contains MAC addresses. Use of this function ensures that
the n-th IP address uses always the n-th MAC address.
:param element_list: An arbitrary number of lists.
:return: A tuple of the n-th element of every list.
"""
range_max = min([len(x) for x in element_list])
if range_max > 0: range_max -= 1
n = randint(0, range_max)
return tuple(x[n] for x in element_list)
def index_increment(number: int, max: int):
if number + 1 < max:
return number + 1
else:
return 0
def get_attacker_config(ipAddress: str):
"""
Returns the attacker configuration depending on the IP address, this includes the port for the next
attacking packet and the previously used (fixed) TTL value.
:param ipAddress: The IP address of the attacker
:return: A tuple consisting of (port, ttlValue)
"""
# Determine port
port = attacker_port_mapping.get(ipAddress)
if port is not None: # use next port
next_port = attacker_port_mapping.get(ipAddress) + 1
if next_port > (2 ** 16 - 1):
next_port = 1
else: # generate starting port
next_port = RandShort()
attacker_port_mapping[ipAddress] = next_port
# Determine TTL value
ttl = attacker_ttl_mapping.get(ipAddress)
if ttl is None: # determine TTL value
is_invalid = True
pos = ip_source_list.index(ipAddress)
pos_max = len(gd)
while is_invalid:
ttl = int(round(gd[pos]))
if 0 < ttl < 256: # validity check
is_invalid = False
else:
pos = index_increment(pos, pos_max)
attacker_ttl_mapping[ipAddress] = ttl
# return port and TTL
return next_port, ttl
BUFFER_SIZE = 1000
# Determine source IP and MAC address
num_attackers = self.get_param_value(Param.NUMBER_ATTACKERS)
if num_attackers is not None: # user supplied Param.NUMBER_ATTACKERS
# Create random attackers based on user input Param.NUMBER_ATTACKERS
ip_source_list = self.generate_random_ipv4_address(num_attackers)
mac_source_list = self.generate_random_mac_address(num_attackers)
else: # user did not supply Param.NUMBER_ATTACKS
# use default values for IP_SOURCE/MAC_SOURCE or overwritten values
# if user supplied any values for those params
ip_source_list = self.get_param_value(Param.IP_SOURCE)
mac_source_list = self.get_param_value(Param.MAC_SOURCE)
# Timestamp
timestamp_next_pkt = self.get_param_value(Param.INJECT_AT_TIMESTAMP)
pps = self.get_param_value(Param.PACKETS_PER_SECOND)
randomdelay = Lea.fromValFreqsDict({1 / pps: 70, 2 / pps: 30, 5 / pps: 15, 10 / pps: 3})
# Initialize parameters
packets = deque(maxlen=BUFFER_SIZE)
port_source_list = self.get_param_value(Param.PORT_SOURCE)
mac_destination = self.get_param_value(Param.MAC_DESTINATION)
ip_destination = self.get_param_value(Param.IP_DESTINATION)
# Aidmar - attack an open port of ip.dst
port_destination = self.statistics.process_db_query(
"SELECT portNumber FROM ip_ports WHERE portDirection='in' AND ipAddress='"+ip_destination+"' ORDER BY RANDOM() LIMIT 1;")
if not port_destination:
port_destination = str(RandShort())
self.add_param_value(Param.PORT_DESTINATION, port_destination)
# ==============================================================================================================
port_destination = self.get_param_value(Param.PORT_DESTINATION)
attacker_port_mapping = {}
attacker_ttl_mapping = {}
# Gamma distribution parameters derived from MAWI 13.8G dataset
alpha, loc, beta = (2.3261710235, -0.188306914406, 44.4853123884)
gd = gamma.rvs(alpha, loc=loc, scale=beta, size=len(ip_source_list))
path_attack_pcap = None
for pkt_num in range(self.get_param_value(Param.PACKETS_LIMIT)):
# Select one IP address and its corresponding MAC address
(ip_source, mac_source) = get_nth_random_element(ip_source_list, mac_source_list)
# Determine source port
(port_source, ttl_value) = get_attacker_config(ip_source)
maxdelay = randomdelay.random()
request_ether = Ether(dst=mac_destination, src=mac_source)
request_ip = IP(src=ip_source, dst=ip_destination, ttl=ttl_value)
# Aidmar - random win size for each packet
#request_tcp = TCP(sport=port_source, dport=port_destination, flags='S', ack=0)
# Win size starts usually with 1 MSS, find the most used MSS in the traffic and use it as min, while max is 8192 = default scapy win size
# TO-DO: find most mSS used in traffic
request_tcp = TCP(sport=port_source, dport=port_destination, flags='S', ack=0, window=randint(1460,8192))
# =========================================================================================================
request = (request_ether / request_ip / request_tcp)
request.time = timestamp_next_pkt
packets.append(request)
timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, maxdelay)
# Store timestamp of first packet (for attack label)
if pkt_num == 1:
self.attack_start_utime = packets[0].time
elif pkt_num % BUFFER_SIZE == 0:
last_packet = packets[-1]
packets = sorted(packets, key=lambda pkt: pkt.time)
path_attack_pcap = self.write_attack_pcap(packets, True, path_attack_pcap)
packets = []
if len(packets) > 0:
packets = sorted(packets, key=lambda pkt: pkt.time)
path_attack_pcap = self.write_attack_pcap(packets, True, path_attack_pcap)
# Store timestamp of last packet
self.attack_end_utime = last_packet.time
# return packets sorted by packet time_sec_start
# pkt_num+1: because pkt_num starts at 0
return pkt_num + 1, path_attack_pcap