Create lanscan_arp.py

davidbombal · web-flow · commit 9da3811016bd · 2021-03-12T13:47:22.000Z
diff --git a/lanscan_arp.py b/lanscan_arp.py
@@ -0,0 +1,35 @@
+# Import scapy
+import scapy.all as scapy
+# We need to create regular expressions to ensure that the input is correctly formatted.
+import re
+
+# Basic user interface header
+print(r"""______            _     _  ______                 _           _ 
+|  _  \          (_)   | | | ___ \               | |         | |
+| | | |__ ___   ___  __| | | |_/ / ___  _ __ ___ | |__   __ _| |
+| | | / _` \ \ / / |/ _` | | ___ \/ _ \| '_ ` _ \| '_ \ / _` | |
+| |/ / (_| |\ V /| | (_| | | |_/ / (_) | | | | | | |_) | (_| | |
+|___/ \__,_| \_/ |_|\__,_| \____/ \___/|_| |_| |_|_.__/ \__,_|_|""")
+print("\n****************************************************************")
+print("\n* Copyright of David Bombal, 2021                              *")
+print("\n* https://www.davidbombal.com                                  *")
+print("\n* https://www.youtube.com/davidbombal                          *")
+print("\n****************************************************************")
+
+# Regular Expression Pattern to recognise IPv4 addresses.
+ip_add_range_pattern = re.compile("^(?:[0-9]{1,3}\.){3}[0-9]{1,3}/[0-9]*$")
+
+# Get the address range to ARP
+while True:
+    ip_add_range_entered = input("\nPlease enter the ip address and range that you want to send the ARP request to (ex 192.168.1.0/24): ")
+    if ip_add_range_pattern.search(ip_add_range_entered):
+        print(f"{ip_add_range_entered} is a valid ip address range")
+        break
+
+
+# Try ARPing the ip address range supplied by the user. 
+# The arping() method in scapy creates a pakcet with an ARP message 
+# and sends it to the broadcast mac address ff:ff:ff:ff:ff:ff.
+# If a valid ip address range was supplied the program will return 
+# the list of all results.
+arp_result = scapy.arping(ip_add_range_entered)
