Arryt, arryt. Now, I know what you've thinking. Hey Akane, I know this code runs like melted butter on a pan, but what am I seeing here? Ain't nobody buying that we're cool if we can't explain sheet right? You asked for it!

So! Nerd Alert!

The code you is a simple custom port scanner written in Python 3. Let me describe each part of the code in detail:

1. Import Statements:
   
   

   import sys
   import socket
   from datetime import datetime

   
   

   sys: This module provides access to some variables used or maintained by the interpreter and to functions that interact with the interpreter.

   socket: The socket module provides low-level network programming capabilities.

   datetime: The datetime module is used to work with dates and times.
   
   

2. Target Definition:
   
   

   if len(sys.argv) == 2:
       target = socket.gethostbyname(sys.argv[1])
   else:
       print("Invalid number of arguments.")
       print("Syntax: python3 scanner.py <ip>")
       sys.exit()

   
   
   

   • This part of the code checks if the script is executed with the correct number of arguments (i.e., one argument, which is the target IP address).

   • If the correct number of arguments is provided, it retrieves the IP address of the target using socket.gethostbyname().
     
     

3. Banner and Information Display:

   
   
   

   print("-" * 50)
   print("Scanning target " + target)
   print("Time started: " + str(datetime.now()))
   print("-" * 50)

   
   
   

   • These lines are used to display a banner with a horizontal line to separate information.

   • It shows the target IP address and the current date and time when the scan started.
     
     

4. Port Scanning Loop:
   
   
   

   try:
       for port in range(50, 800):
           s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
           socket.setdefaulttimeout(1)
           result = s.connect_ex((target, port))
           if result == 0:
               print(f"Port {port} is open")
           s.close()

   
   
   

   • This part of the code contains the main scanning logic.

   • It uses a for loop to iterate through a range of port numbers from 50 to 799.

   • For each port, it creates a socket (socket.socket) with IPv4 address family (socket.AF_INET) and TCP socket type (socket.SOCK_STREAM).

   • It sets a socket timeout of 1 second to avoid long hangs in case a port is unresponsive.

   • It attempts to establish a connection (s.connect_ex()) to the target IP address and port. If the result is 0, it means the port is open, and it prints a message indicating that the port is open.

   • Finally, it closes the socket.
     
     

5. Exception Handling:
   
   

   except KeyboardInterrupt:
       print("\nExiting program.")
       sys.exit()
   except socket.gaierror:
       print("Hostname could not be resolved.")
       sys.exit()
   except socket.error:
       print("Could not connect to the server.")
       sys.exit()

   
   
   

   • The code includes exception handling to catch different types of errors that might occur during execution.

   • If the user interrupts the program (e.g., by pressing Ctrl+C), it gracefully exits the program.

   • If there is an issue with hostname resolution or a generic socket error, it displays an error message and exits.

This code provides a basic example of a port scanner that iterates through a range of ports on a target IP address and checks if they are open or closed. However, it's important to note that real-world port scanning should be performed responsibly and within legal boundaries, with proper authorization and consent. Unauthorized port scanning can have legal and ethical consequences.