From 68dabbcee5739d9ba3d141801b5eac70627c02f1 Mon Sep 17 00:00:00 2001
From: Ayush Srivastava <32226567+ayushsinha30@users.noreply.github.com>
Date: Thu, 7 Oct 2021 13:54:27 +0530
Subject: [PATCH] Create portscanner.py

---
 portscanner.py | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 portscanner.py

diff --git a/portscanner.py b/portscanner.py
new file mode 100644
index 0000000..eb84e3c
--- /dev/null
+++ b/portscanner.py
@@ -0,0 +1,32 @@
+#!usr/bin/python3 
+
+import socket
+import sys
+import threading
+
+usage = "python3 portscanner.py TARGET START_PORT END_PORT"
+
+if(len(sys.argv) !=4):
+    print(usage)
+    sys.exit()
+
+try:
+    target=socket.gethostbyname(sys.argv[1])
+except socket.gaierror:
+    print("Name resolution error")
+    sys.exit()
+
+start_port = int(sys.argv[2])
+end_port = int(sys.argv[3])
+
+def scan_port(port):
+    s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    s.settimeout(2)
+    conn = s.connect_ex((target,port))
+    if(not conn):
+        print("Port {} is OPEN".format(port))
+    s.close()
+
+for port in range(start_port, end_port+1):
+    thread = threading.Thread(target=scan_port, args = (port,))
+    thread.start()