From e6743dacb2918c697bcf5adbd74ab4f739383ba3 Mon Sep 17 00:00:00 2001
From: TKE <tobias.kessels@certbw.de>
Date: Thu, 25 Mar 2021 19:04:15 +0100
Subject: [PATCH] add scapy arpscanner

---
 scapy_arp.py | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 scapy_arp.py

diff --git a/scapy_arp.py b/scapy_arp.py
new file mode 100644
index 0000000..91c3ab2
--- /dev/null
+++ b/scapy_arp.py
@@ -0,0 +1,47 @@
+from scapy.all import srp, Ether, ARP
+from threading import Thread
+from ipaddress import IPv4Network
+from pprint import pprint
+from time import sleep, time
+
+threads = []
+
+clients = list()
+class Scanner(Thread):
+    def __init__(self, ip):
+        super().__init__()
+        self.ip = ip
+
+    def run(self):
+        # The below code from https://www.thepythoncode.com/article/building-network-scanner-using-scapy
+        packet = Ether(dst="ff:ff:ff:ff:ff:ff") / ARP(pdst=self.ip)
+        # this is a tuple, which index 0 is host that answers arp request.
+        # while index 1 is unanswered when no host answers arp request.
+        result = srp(packet, timeout=3, verbose=0)[0]
+        # the result is a tuple with index 0 as sent, and 1 as received.
+        for _, received in result:
+            # psrc is the arp responder's ip address
+            # hwsrc is the arp responder's mac address
+            clients.append(
+                {
+                    "ip": received.psrc,
+                    "mac": received.hwsrc
+                }
+            )
+        # maintain consistency by forcing this method to sleep for 1 second
+        # before beginning the next host.
+        sleep(1)
+
+
+if __name__ == "__main__":
+    start = time()
+    for ip in IPv4Network('192.168.178.0/24').hosts():
+        t = Scanner(str(ip))
+        threads.append(t)
+        t.start()
+
+    for t in threads:
+        t.join()
+
+    pprint(clients)
+    print(f"Executed in {time() - start} seconds.")
\ No newline at end of file