Adds socket code for multithreaded.

networks/code/port-scanner.py

@@ -0,0 +1,40 @@
+import argparse
+import socket
+from colorama import init, Fore
+
+def is_port_open(host: str, port: int) -> bool:
+    """
+    Checks if a port is open on a host.
+    """
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    try:
+        sock.connect((host, port))
+        sock.settimeout(0.5)
+    except:
+        return False
+    else:
+        return True
+
+
+if __name__ == '__main__':
+    
+    init() # initialize colorama
+
+    # Declare arguments
+    parser = argparse.ArgumentParser(description='Port Scanner')
+    parser.add_argument('-H', '--host', help='Host to scan', required=True, type=str)
+    parser.add_argument('-s', '--start', help='Starting port', default=1, type=int)
+    parser.add_argument('-e', '--end', help='Ending port', default=1024, type=int)
+
+    # Parse arguments
+    args = parser.parse_args()
+    host, start, end = args.host, args.start, args.end
+
+    for port in range(start, end):
+        if not is_port_open(host, port):
+            print(f'{Fore.RED}Port {port} is closed{Fore.RESET}')
+            continue
+        print(f'{Fore.GREEN}Port {port} is open{Fore.RESET}')        
+
+
+