traffic sniffer is added

traffic_sniffer/traffic_sniffer.py

@@ -0,0 +1,34 @@
+import pyshark
+import argparse
+from datetime import datetime
+
+
+def sniff(interface, n_packet, filename):
+    capture = pyshark.LiveCapture(interface=interface)
+    capture.sniff(packet_count=n_packet)
+
+    with open(filename + '.txt', 'a+') as file:
+        for n, pkt in enumerate(capture):
+            file.write("Packet #" + str(n + 1) + ':\n')
+            file.write(str(pkt) + '\n')
+    capture.close()
+
+
+if __name__ == "__main__":
+    programDescription = '''
+        Command Line Tool: python sniffer using pyshark; Need to run with `sudo`
+    '''
+
+    parser = argparse.ArgumentParser(description=programDescription)
+    parser.add_argument("--interface", "-i", help="interface")
+    parser.add_argument("--number", "-n", help="number of packets")
+    parser.add_argument("--filename", "-f", help="filename to save")
+    args = parser.parse_args()
+
+    interface = args.interface if args.interface else 'en0'
+    number = abs(int(args.number)) if args.number else 50
+    filename = args.filename if args.filename else "result"
+    
+    sniff(interface, number, filename)
+
+    print('Sniffing is completed at %s' % datetime.now())