refactor imports in Attack/SMBScanAttack.py

refactor whitspaces in Attack/SMBScanAttack.py
deep refactoring Attack/SMBScanAttack.py

code/Attack/SMBScanAttack.py

@@ -1,52 +1,47 @@
 import logging
+import random as rnd
 
-from random import shuffle, randint
-from lea import Lea
-from scapy.layers.inet import IP, Ether, TCP
+import scapy.layers.inet as inet
 from scapy.layers.smb import *
-from scapy.layers.netbios import *
-
-from Attack import BaseAttack
-from Attack.AttackParameters import Parameter as Param
-from Attack.AttackParameters import ParameterTypes
-from ID2TLib.SMB2 import *
-from ID2TLib.Utility import update_timestamp, get_interval_pps, get_ip_range,\
-    generate_source_port_from_platform, get_filetime_format, handle_most_used_outputs
-import ID2TLib.Utility
-from ID2TLib.SMBLib import smb_port, smb_versions, smb_dialects, get_smb_version, get_smb_platform_data,\
-    invalid_smb_version
+
+import Attack.AttackParameters as atkParam
+import Attack.BaseAttack as BaseAttack
+import ID2TLib.SMB2 as SMB2
+import ID2TLib.SMBLib as SMBLib
+import ID2TLib.Utility as Util
 
 logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
+
 # noinspection PyPep8
 
 
 class SMBScanAttack(BaseAttack.BaseAttack):
-
     def __init__(self):
         """
         Creates a new instance of the SMBScanAttack.
-
         """
         # Initialize attack
         super(SMBScanAttack, self).__init__("SmbScan Attack", "Injects an SMB scan",
-                                             "Scanning/Probing")
+                                            "Scanning/Probing")
+
+        self.host_os = Util.get_rnd_os()
 
         # Define allowed parameters and their type
         self.supported_params.update({
-            Param.IP_SOURCE: ParameterTypes.TYPE_IP_ADDRESS,
-            Param.IP_DESTINATION: ParameterTypes.TYPE_IP_ADDRESS,
-            Param.PORT_SOURCE: ParameterTypes.TYPE_PORT,
-            Param.MAC_SOURCE: ParameterTypes.TYPE_MAC_ADDRESS,
-            Param.MAC_DESTINATION: ParameterTypes.TYPE_MAC_ADDRESS,
-            Param.INJECT_AT_TIMESTAMP: ParameterTypes.TYPE_FLOAT,
-            Param.INJECT_AFTER_PACKET: ParameterTypes.TYPE_PACKET_POSITION,
-            Param.IP_SOURCE_RANDOMIZE: ParameterTypes.TYPE_BOOLEAN,
-            Param.PACKETS_PER_SECOND: ParameterTypes.TYPE_FLOAT,
-            Param.PORT_SOURCE_RANDOMIZE: ParameterTypes.TYPE_BOOLEAN,
-            Param.HOSTING_IP: ParameterTypes.TYPE_IP_ADDRESS,
-            Param.HOSTING_VERSION: ParameterTypes.TYPE_STRING,
-            Param.SOURCE_PLATFORM: ParameterTypes.TYPE_STRING,
-            Param.PROTOCOL_VERSION: ParameterTypes.TYPE_STRING
+            atkParam.Parameter.IP_SOURCE: atkParam.ParameterTypes.TYPE_IP_ADDRESS,
+            atkParam.Parameter.IP_DESTINATION: atkParam.ParameterTypes.TYPE_IP_ADDRESS,
+            atkParam.Parameter.PORT_SOURCE: atkParam.ParameterTypes.TYPE_PORT,
+            atkParam.Parameter.MAC_SOURCE: atkParam.ParameterTypes.TYPE_MAC_ADDRESS,
+            atkParam.Parameter.MAC_DESTINATION: atkParam.ParameterTypes.TYPE_MAC_ADDRESS,
+            atkParam.Parameter.INJECT_AT_TIMESTAMP: atkParam.ParameterTypes.TYPE_FLOAT,
+            atkParam.Parameter.INJECT_AFTER_PACKET: atkParam.ParameterTypes.TYPE_PACKET_POSITION,
+            atkParam.Parameter.IP_SOURCE_RANDOMIZE: atkParam.ParameterTypes.TYPE_BOOLEAN,
+            atkParam.Parameter.PACKETS_PER_SECOND: atkParam.ParameterTypes.TYPE_FLOAT,
+            atkParam.Parameter.PORT_SOURCE_RANDOMIZE: atkParam.ParameterTypes.TYPE_BOOLEAN,
+            atkParam.Parameter.HOSTING_IP: atkParam.ParameterTypes.TYPE_IP_ADDRESS,
+            atkParam.Parameter.HOSTING_VERSION: atkParam.ParameterTypes.TYPE_STRING,
+            atkParam.Parameter.SOURCE_PLATFORM: atkParam.ParameterTypes.TYPE_STRING,
+            atkParam.Parameter.PROTOCOL_VERSION: atkParam.ParameterTypes.TYPE_STRING
         })
 
     def init_params(self):
@@ -60,9 +55,9 @@ class SMBScanAttack(BaseAttack.BaseAttack):
         # (values are overwritten if user specifies them)
         most_used_ip_address = self.statistics.get_most_used_ip_address()
 
-        self.add_param_value(Param.IP_SOURCE, most_used_ip_address)
-        self.add_param_value(Param.IP_SOURCE_RANDOMIZE, 'False')
-        self.add_param_value(Param.MAC_SOURCE, self.statistics.get_mac_address(most_used_ip_address))
+        self.add_param_value(atkParam.Parameter.IP_SOURCE, most_used_ip_address)
+        self.add_param_value(atkParam.Parameter.IP_SOURCE_RANDOMIZE, 'False')
+        self.add_param_value(atkParam.Parameter.MAC_SOURCE, self.statistics.get_mac_address(most_used_ip_address))
 
         all_ips = self.statistics.get_ip_addresses()
         if not isinstance(all_ips, list):
@@ -70,64 +65,62 @@ class SMBScanAttack(BaseAttack.BaseAttack):
             ip_destinations.append(all_ips)
         else:
             ip_destinations = all_ips
-        self.add_param_value(Param.IP_DESTINATION, ip_destinations)
+        self.add_param_value(atkParam.Parameter.IP_DESTINATION, ip_destinations)
         destination_mac = []
         for ip in ip_destinations:
             destination_mac.append(self.statistics.get_mac_address(str(ip)))
         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)
-        self.add_param_value(Param.PORT_SOURCE, randint(1024, 65535))
-        self.add_param_value(Param.PORT_SOURCE_RANDOMIZE, 'True')
-        self.add_param_value(Param.PACKETS_PER_SECOND,
+        self.add_param_value(atkParam.Parameter.MAC_DESTINATION, destination_mac)
+        self.add_param_value(atkParam.Parameter.PORT_SOURCE, rnd.randint(1024, 65535))
+        self.add_param_value(atkParam.Parameter.PORT_SOURCE_RANDOMIZE, 'True')
+        self.add_param_value(atkParam.Parameter.PACKETS_PER_SECOND,
                              (self.statistics.get_pps_sent(most_used_ip_address) +
                               self.statistics.get_pps_received(most_used_ip_address)) / 2)
-        self.add_param_value(Param.INJECT_AFTER_PACKET, randint(0, self.statistics.get_packet_count()))
+        self.add_param_value(atkParam.Parameter.INJECT_AFTER_PACKET, rnd.randint(0, self.statistics.get_packet_count()))
 
-        rnd_ip_count = self.statistics.get_ip_address_count()//2
-        self.add_param_value(Param.HOSTING_IP, self.statistics.get_random_ip_address(rnd_ip_count))
-        self.host_os = ID2TLib.Utility.get_rnd_os()
-        self.add_param_value(Param.HOSTING_VERSION, get_smb_version(platform=self.host_os))
-        self.add_param_value(Param.SOURCE_PLATFORM, ID2TLib.Utility.get_rnd_os())
-        self.add_param_value(Param.PROTOCOL_VERSION, "1")
+        rnd_ip_count = self.statistics.get_ip_address_count() // 2
+        self.add_param_value(atkParam.Parameter.HOSTING_IP, self.statistics.get_random_ip_address(rnd_ip_count))
+        self.add_param_value(atkParam.Parameter.HOSTING_VERSION, SMBLib.get_smb_version(platform=self.host_os))
+        self.add_param_value(atkParam.Parameter.SOURCE_PLATFORM, Util.get_rnd_os())
+        self.add_param_value(atkParam.Parameter.PROTOCOL_VERSION, "1")
 
     def generate_attack_packets(self):
 
-        pps = self.get_param_value(Param.PACKETS_PER_SECOND)
+        pps = self.get_param_value(atkParam.Parameter.PACKETS_PER_SECOND)
 
         # Calculate complement packet rates of the background traffic for each interval
         complement_interval_pps = self.statistics.calculate_complement_packet_rates(pps)
 
-
         # Timestamp
-        timestamp_next_pkt = self.get_param_value(Param.INJECT_AT_TIMESTAMP)
+        timestamp_next_pkt = self.get_param_value(atkParam.Parameter.INJECT_AT_TIMESTAMP)
         # store start time of attack
         self.attack_start_utime = timestamp_next_pkt
-        timestamp_prv_reply, timestamp_confirm = 0,0
+        timestamp_prv_reply, timestamp_confirm = 0, 0
 
         # Initialize parameters
-        ip_source = self.get_param_value(Param.IP_SOURCE)
-        ip_destinations = self.get_param_value(Param.IP_DESTINATION)
-        hosting_ip = self.get_param_value(Param.HOSTING_IP)
-        mac_source = self.get_param_value(Param.MAC_SOURCE)
-        mac_dest = self.get_param_value(Param.MAC_DESTINATION)
+        ip_source = self.get_param_value(atkParam.Parameter.IP_SOURCE)
+        ip_destinations = self.get_param_value(atkParam.Parameter.IP_DESTINATION)
+        hosting_ip = self.get_param_value(atkParam.Parameter.HOSTING_IP)
+        mac_source = self.get_param_value(atkParam.Parameter.MAC_SOURCE)
+        mac_dest = self.get_param_value(atkParam.Parameter.MAC_DESTINATION)
 
         # Check smb version
-        smb_version = self.get_param_value(Param.PROTOCOL_VERSION)
-        if smb_version not in smb_versions:
-            invalid_smb_version(smb_version)
-        hosting_version = self.get_param_value(Param.HOSTING_VERSION)
-        if hosting_version not in smb_versions:
-            invalid_smb_version(hosting_version)
+        smb_version = self.get_param_value(atkParam.Parameter.PROTOCOL_VERSION)
+        if smb_version not in SMBLib.smb_versions:
+            SMBLib.invalid_smb_version(smb_version)
+        hosting_version = self.get_param_value(atkParam.Parameter.HOSTING_VERSION)
+        if hosting_version not in SMBLib.smb_versions:
+            SMBLib.invalid_smb_version(hosting_version)
         # Check source platform
-        src_platform = self.get_param_value(Param.SOURCE_PLATFORM).lower()
+        src_platform = self.get_param_value(atkParam.Parameter.SOURCE_PLATFORM).lower()
         self.packets = []
 
         # randomize source ports according to platform, if specified
-        if self.get_param_value(Param.PORT_SOURCE_RANDOMIZE):
-            sport = generate_source_port_from_platform(src_platform)
+        if self.get_param_value(atkParam.Parameter.PORT_SOURCE_RANDOMIZE):
+            sport = Util.generate_source_port_from_platform(src_platform)
         else:
-            sport = self.get_param_value(Param.PORT_SOURCE)
+            sport = self.get_param_value(atkParam.Parameter.PORT_SOURCE)
 
         # No destination IP was specified, but a destination MAC was specified, generate IP that fits MAC
         if isinstance(ip_destinations, list) and isinstance(mac_dest, str):
@@ -144,10 +137,10 @@ class SMBScanAttack(BaseAttack.BaseAttack):
             ip_dests.append(ip_destinations)
 
         if isinstance(ip_dests, list):
-            shuffle(ip_dests)
+            rnd.shuffle(ip_dests)
 
         # Randomize source IP, if specified
-        if self.get_param_value(Param.IP_SOURCE_RANDOMIZE):
+        if self.get_param_value(atkParam.Parameter.IP_SOURCE_RANDOMIZE):
             ip_source = self.generate_random_ipv4_address("Unknown", 1)
             while ip_source in ip_dests:
                 ip_source = self.generate_random_ipv4_address("Unknown", 1)
@@ -178,21 +171,21 @@ class SMBScanAttack(BaseAttack.BaseAttack):
                 # Get MSS, TTL and Window size value for destination IP
                 destination_mss_value, destination_ttl_value, destination_win_value = self.get_ip_data(ip)
 
-                minDelay, maxDelay = self.get_reply_delay(ip)
+                min_delay, max_delay = self.get_reply_delay(ip)
 
                 # New connection, new random TCP sequence numbers
-                attacker_seq = randint(1000, 50000)
-                victim_seq = randint(1000, 50000)
+                attacker_seq = rnd.randint(1000, 50000)
+                victim_seq = rnd.randint(1000, 50000)
 
                 # Randomize source port for each connection if specified
-                if self.get_param_value(Param.PORT_SOURCE_RANDOMIZE):
-                    sport = generate_source_port_from_platform(src_platform, sport)
+                if self.get_param_value(atkParam.Parameter.PORT_SOURCE_RANDOMIZE):
+                    sport = Util.generate_source_port_from_platform(src_platform, sport)
 
                 # 1) Build request package
-                request_ether = Ether(src=mac_source, dst=mac_destination)
-                request_ip = IP(src=ip_source, dst=ip, ttl=source_ttl_value, flags='DF')
-                request_tcp = TCP(sport=sport, dport=smb_port, window=source_win_value, flags='S',
-                                  seq=attacker_seq, options=[('MSS', source_mss_value)])
+                request_ether = inet.Ether(src=mac_source, dst=mac_destination)
+                request_ip = inet.IP(src=ip_source, dst=ip, ttl=source_ttl_value, flags='DF')
+                request_tcp = inet.TCP(sport=sport, dport=SMBLib.smb_port, window=source_win_value, flags='S',
+                                       seq=attacker_seq, options=[('MSS', source_mss_value)])
                 attacker_seq += 1
                 request = (request_ether / request_ip / request_tcp)
                 request.time = timestamp_next_pkt
@@ -201,9 +194,9 @@ class SMBScanAttack(BaseAttack.BaseAttack):
                 self.packets.append(request)
 
                 # Update timestamp for next package
-                timestamp_reply = update_timestamp(timestamp_next_pkt, pps, minDelay)
-                while (timestamp_reply <= timestamp_prv_reply):
-                    timestamp_reply = update_timestamp(timestamp_prv_reply, pps, minDelay)
+                timestamp_reply = Util.update_timestamp(timestamp_next_pkt, pps, min_delay)
+                while timestamp_reply <= timestamp_prv_reply:
+                    timestamp_reply = Util.update_timestamp(timestamp_prv_reply, pps, min_delay)
                 timestamp_prv_reply = timestamp_reply
 
                 if ip in hosting_ip:
@@ -211,10 +204,11 @@ class SMBScanAttack(BaseAttack.BaseAttack):
                     # 2) Build TCP packages for ip that hosts SMB
 
                     # destination sends SYN, ACK
-                    reply_ether = Ether(src=mac_destination, dst=mac_source)
-                    reply_ip = IP(src=ip, dst=ip_source, ttl=destination_ttl_value, flags='DF')
-                    reply_tcp = TCP(sport=smb_port, dport=sport, seq=victim_seq, ack=attacker_seq, flags='SA',
-                                    window=destination_win_value, options=[('MSS', destination_mss_value)])
+                    reply_ether = inet.Ether(src=mac_destination, dst=mac_source)
+                    reply_ip = inet.IP(src=ip, dst=ip_source, ttl=destination_ttl_value, flags='DF')
+                    reply_tcp = inet.TCP(sport=SMBLib.smb_port, dport=sport, seq=victim_seq, ack=attacker_seq,
+                                         flags='SA',
+                                         window=destination_win_value, options=[('MSS', destination_mss_value)])
                     victim_seq += 1
                     reply = (reply_ether / reply_ip / reply_tcp)
                     reply.time = timestamp_reply
@@ -223,143 +217,148 @@ class SMBScanAttack(BaseAttack.BaseAttack):
                     # requester confirms, ACK
                     confirm_ether = request_ether
                     confirm_ip = request_ip
-                    confirm_tcp = TCP(sport=sport, dport=smb_port, seq=attacker_seq, ack=victim_seq,
-                                      window=source_win_value, flags='A')
+                    confirm_tcp = inet.TCP(sport=sport, dport=SMBLib.smb_port, seq=attacker_seq, ack=victim_seq,
+                                           window=source_win_value, flags='A')
                     confirm = (confirm_ether / confirm_ip / confirm_tcp)
-                    timestamp_confirm = update_timestamp(timestamp_reply, pps, minDelay)
+                    timestamp_confirm = Util.update_timestamp(timestamp_reply, pps, min_delay)
                     confirm.time = timestamp_confirm
                     self.packets.append(confirm)
 
-                    smb_MID = randint(1, 65535)
-                    smb_PID = randint(1, 65535)
+                    smb_mid = rnd.randint(1, 65535)
+                    smb_pid = rnd.randint(1, 65535)
                     smb_req_tail_arr = []
                     smb_req_tail_size = 0
 
                     # select dialects based on smb version
                     if smb_version is "1":
-                        smb_req_dialects = smb_dialects[0:6]
+                        smb_req_dialects = SMBLib.smb_dialects[0:6]
                     else:
-                        smb_req_dialects = smb_dialects
+                        smb_req_dialects = SMBLib.smb_dialects
                     if len(smb_req_dialects) == 0:
                         smb_req_tail_arr.append(SMBNegociate_Protocol_Request_Tail())
                         smb_req_tail_size = len(SMBNegociate_Protocol_Request_Tail())
                     else:
                         for dia in smb_req_dialects:
-                            smb_req_tail_arr.append(SMBNegociate_Protocol_Request_Tail(BufferData = dia))
-                            smb_req_tail_size += len(SMBNegociate_Protocol_Request_Tail(BufferData = dia))
+                            smb_req_tail_arr.append(SMBNegociate_Protocol_Request_Tail(BufferData=dia))
+                            smb_req_tail_size += len(SMBNegociate_Protocol_Request_Tail(BufferData=dia))
 
-                    smb_req_head = SMBNegociate_Protocol_Request_Header\
-                        (Flags2=0x2801, PID=smb_PID, MID=smb_MID, ByteCount=smb_req_tail_size)
+                    smb_req_head = SMBNegociate_Protocol_Request_Header(Flags2=0x2801, PID=smb_pid, MID=smb_mid,
+                                                                        ByteCount=smb_req_tail_size)
                     smb_req_length = len(smb_req_head) + smb_req_tail_size
                     smb_req_net_bio = NBTSession(TYPE=0x00, LENGTH=smb_req_length)
-                    smb_req_tcp = TCP(sport=sport, dport=smb_port, flags='PA', seq=attacker_seq, ack=victim_seq)
-                    smb_req_ip = IP(src=ip_source, dst=ip, ttl=source_ttl_value)
-                    smb_req_ether = Ether(src=mac_source, dst=mac_destination)
+                    smb_req_tcp = inet.TCP(sport=sport, dport=SMBLib.smb_port, flags='PA', seq=attacker_seq,
+                                           ack=victim_seq)
+                    smb_req_ip = inet.IP(src=ip_source, dst=ip, ttl=source_ttl_value)
+                    smb_req_ether = inet.Ether(src=mac_source, dst=mac_destination)
                     attacker_seq += len(smb_req_net_bio) + len(smb_req_head) + smb_req_tail_size
 
                     smb_req_combined = (smb_req_ether / smb_req_ip / smb_req_tcp / smb_req_net_bio / smb_req_head)
 
-                    for i in range(0 , len(smb_req_tail_arr)):
+                    for i in range(0, len(smb_req_tail_arr)):
                         smb_req_combined = smb_req_combined / smb_req_tail_arr[i]
 
-                    timestamp_smb_req = update_timestamp(timestamp_confirm, pps, minDelay)
+                    timestamp_smb_req = Util.update_timestamp(timestamp_confirm, pps, min_delay)
                     smb_req_combined.time = timestamp_smb_req
                     self.packets.append(smb_req_combined)
 
                     # destination confirms SMB request package
-                    reply_tcp = TCP(sport=smb_port, dport=sport, seq=victim_seq, ack=attacker_seq,
-                                    window=destination_win_value, flags='A')
+                    reply_tcp = inet.TCP(sport=SMBLib.smb_port, dport=sport, seq=victim_seq, ack=attacker_seq,
+                                         window=destination_win_value, flags='A')
                     confirm_smb_req = (reply_ether / reply_ip / reply_tcp)
-                    timestamp_reply = update_timestamp(timestamp_smb_req, pps, minDelay)
+                    timestamp_reply = Util.update_timestamp(timestamp_smb_req, pps, min_delay)
                     confirm_smb_req.time = timestamp_reply
                     self.packets.append(confirm_smb_req)
 
                     # smb response package
                     first_timestamp = time.mktime(time.strptime(self.statistics.get_pcap_timestamp_start()[:19],
                                                                 "%Y-%m-%d %H:%M:%S"))
-                    server_Guid, security_blob, capabilities, data_size, server_start_time = get_smb_platform_data\
-                        (self.host_os, first_timestamp)
+                    server_guid, security_blob, capabilities, data_size, server_start_time =\
+                        SMBLib.get_smb_platform_data(self.host_os, first_timestamp)
 
-                    timestamp_smb_rsp = update_timestamp(timestamp_reply, pps, minDelay)
+                    timestamp_smb_rsp = Util.update_timestamp(timestamp_reply, pps, min_delay)
                     diff = timestamp_smb_rsp - timestamp_smb_req
-                    begin = get_filetime_format(timestamp_smb_req+diff*0.1)
-                    end = get_filetime_format(timestamp_smb_rsp-diff*0.1)
-                    system_time = randint(begin, end)
+                    begin = Util.get_filetime_format(timestamp_smb_req + diff * 0.1)
+                    end = Util.get_filetime_format(timestamp_smb_rsp - diff * 0.1)
+                    system_time = rnd.randint(begin, end)
 
                     if smb_version is not "1" and hosting_version is not "1":
-                        smb_rsp_paket = SMB2_SYNC_Header(Flags = 1)
-                        smb_rsp_negotiate_body = SMB2_Negotiate_Protocol_Response\
-                            (DialectRevision=0x02ff, SecurityBufferOffset=124, SecurityBufferLength=len(security_blob),
-                             SecurityBlob=security_blob, Capabilities=capabilities, MaxTransactSize=data_size,
-                             MaxReadSize=data_size, MaxWriteSize=data_size, SystemTime=system_time,
-                             ServerStartTime=server_start_time, ServerGuid=server_Guid)
+                        smb_rsp_paket = SMB2.SMB2_SYNC_Header(Flags=1)
+                        smb_rsp_negotiate_body =\
+                            SMB2.SMB2_Negotiate_Protocol_Response(DialectRevision=0x02ff, SecurityBufferOffset=124,
+                                                                  SecurityBufferLength=len(security_blob),
+                                                                  SecurityBlob=security_blob, Capabilities=capabilities,
+                                                                  MaxTransactSize=data_size, MaxReadSize=data_size,
+                                                                  MaxWriteSize=data_size, SystemTime=system_time,
+                                                                  ServerStartTime=server_start_time,
+                                                                  ServerGuid=server_guid)
                         smb_rsp_length = len(smb_rsp_paket) + len(smb_rsp_negotiate_body)
                     else:
-                        smb_rsp_paket = SMBNegociate_Protocol_Response_Advanced_Security\
-                            (Start="\xffSMB", PID=smb_PID, MID=smb_MID, DialectIndex=5, SecurityBlob=security_blob)
+                        smb_rsp_paket =\
+                            SMBNegociate_Protocol_Response_Advanced_Security(Start="\xffSMB", PID=smb_pid, MID=smb_mid,
+                                                                             DialectIndex=5, SecurityBlob=security_blob)
                         smb_rsp_length = len(smb_rsp_paket)
                     smb_rsp_net_bio = NBTSession(TYPE=0x00, LENGTH=smb_rsp_length)
-                    smb_rsp_tcp = TCP(sport=smb_port, dport=sport, flags='PA', seq=victim_seq, ack=attacker_seq)
-                    smb_rsp_ip = IP(src=ip, dst=ip_source, ttl=destination_ttl_value)
-                    smb_rsp_ether = Ether(src=mac_destination, dst=mac_source)
+                    smb_rsp_tcp = inet.TCP(sport=SMBLib.smb_port, dport=sport, flags='PA', seq=victim_seq,
+                                           ack=attacker_seq)
+                    smb_rsp_ip = inet.IP(src=ip, dst=ip_source, ttl=destination_ttl_value)
+                    smb_rsp_ether = inet.Ether(src=mac_destination, dst=mac_source)
                     victim_seq += len(smb_rsp_net_bio) + len(smb_rsp_paket)
-                    if smb_version is not "1"and hosting_version is not "1":
+                    if smb_version is not "1" and hosting_version is not "1":
                         victim_seq += len(smb_rsp_negotiate_body)
 
                     smb_rsp_combined = (smb_rsp_ether / smb_rsp_ip / smb_rsp_tcp / smb_rsp_net_bio / smb_rsp_paket)
-                    if smb_version is not "1"and hosting_version is not "1":
+                    if smb_version is not "1" and hosting_version is not "1":
                         smb_rsp_combined = (smb_rsp_combined / smb_rsp_negotiate_body)
 
                     smb_rsp_combined.time = timestamp_smb_rsp
                     self.packets.append(smb_rsp_combined)
 
-
                     # source confirms SMB response package
-                    confirm_tcp = TCP(sport=sport, dport=smb_port, seq=attacker_seq, ack=victim_seq,
-                                      window=source_win_value, flags='A')
+                    confirm_tcp = inet.TCP(sport=sport, dport=SMBLib.smb_port, seq=attacker_seq, ack=victim_seq,
+                                           window=source_win_value, flags='A')
                     confirm_smb_res = (confirm_ether / confirm_ip / confirm_tcp)
-                    timestamp_confirm = update_timestamp(timestamp_smb_rsp, pps, minDelay)
+                    timestamp_confirm = Util.update_timestamp(timestamp_smb_rsp, pps, min_delay)
                     confirm_smb_res.time = timestamp_confirm
                     self.packets.append(confirm_smb_res)
 
                     # attacker sends FIN ACK
-                    confirm_tcp = TCP(sport=sport, dport=smb_port, seq=attacker_seq, ack=victim_seq,
-                                      window=source_win_value, flags='FA')
+                    confirm_tcp = inet.TCP(sport=sport, dport=SMBLib.smb_port, seq=attacker_seq, ack=victim_seq,
+                                           window=source_win_value, flags='FA')
                     source_fin_ack = (confirm_ether / confirm_ip / confirm_tcp)
-                    timestamp_src_fin_ack = update_timestamp(timestamp_confirm, pps, minDelay)
+                    timestamp_src_fin_ack = Util.update_timestamp(timestamp_confirm, pps, min_delay)
                     source_fin_ack.time = timestamp_src_fin_ack
                     attacker_seq += 1
                     self.packets.append(source_fin_ack)
 
                     # victim sends FIN ACK
-                    reply_tcp = TCP(sport=smb_port, dport=sport, seq=victim_seq, ack=attacker_seq,
-                                    window=destination_win_value, flags='FA')
+                    reply_tcp = inet.TCP(sport=SMBLib.smb_port, dport=sport, seq=victim_seq, ack=attacker_seq,
+                                         window=destination_win_value, flags='FA')
                     destination_fin_ack = (reply_ether / reply_ip / reply_tcp)
-                    timestamp_dest_fin_ack = update_timestamp(timestamp_src_fin_ack, pps, minDelay)
+                    timestamp_dest_fin_ack = Util.update_timestamp(timestamp_src_fin_ack, pps, min_delay)
                     victim_seq += 1
                     destination_fin_ack.time = timestamp_dest_fin_ack
                     self.packets.append(destination_fin_ack)
 
                     # source sends final ACK
-                    confirm_tcp = TCP(sport=sport, dport=smb_port, seq=attacker_seq, ack=victim_seq,
-                                      window=source_win_value, flags='A')
+                    confirm_tcp = inet.TCP(sport=sport, dport=SMBLib.smb_port, seq=attacker_seq, ack=victim_seq,
+                                           window=source_win_value, flags='A')
                     final_ack = (confirm_ether / confirm_ip / confirm_tcp)
-                    timestamp_final_ack = update_timestamp(timestamp_dest_fin_ack, pps, minDelay)
+                    timestamp_final_ack = Util.update_timestamp(timestamp_dest_fin_ack, pps, min_delay)
                     final_ack.time = timestamp_final_ack
                     self.packets.append(final_ack)
 
                 else:
                     # Build RST package
-                    reply_ether = Ether(src=mac_destination, dst=mac_source)
-                    reply_ip = IP(src=ip, dst=ip_source, ttl=destination_ttl_value, flags='DF')
-                    reply_tcp = TCP(sport=smb_port, dport=sport, seq=0, ack=attacker_seq, flags='RA',
-                                    window=destination_win_value, options=[('MSS', destination_mss_value)])
+                    reply_ether = inet.Ether(src=mac_destination, dst=mac_source)
+                    reply_ip = inet.IP(src=ip, dst=ip_source, ttl=destination_ttl_value, flags='DF')
+                    reply_tcp = inet.TCP(sport=SMBLib.smb_port, dport=sport, seq=0, ack=attacker_seq, flags='RA',
+                                         window=destination_win_value, options=[('MSS', destination_mss_value)])
                     reply = (reply_ether / reply_ip / reply_tcp)
                     reply.time = timestamp_reply
                     self.packets.append(reply)
 
-            pps = max(get_interval_pps(complement_interval_pps, timestamp_next_pkt), 10)
-            timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps)
+            pps = max(Util.get_interval_pps(complement_interval_pps, timestamp_next_pkt), 10)
+            timestamp_next_pkt = Util.update_timestamp(timestamp_next_pkt, pps)
 
     def generate_attack_pcap(self):