ID2T-toolkit/code/Attack/DDoSAttack.py

import logging
from random import randint, choice, uniform
from lea import Lea
from scipy.stats import stats, 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()))
        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)
        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) + 1):
            # 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)
            request_tcp = TCP(sport=port_source, dport=port_destination, flags='S', ack=0)

            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 = []

        # Store timestamp of last packet
        self.attack_end_utime = last_packet.time

        # return packets sorted by packet time_sec_start
        return pkt_num, path_attack_pcap