Create a program to create port scanner in python assignment solution.

import socket

import time

import sys

from datetime import date

if __name__ == '__main__':

    # ask for domain

    ip = input("Enter ip address or domain name to scan: ")

    # Validate that input is numeric for starting port end ending port

    try:

        port_a = int(input("Enter starting port number (1 - 65535): "))

        port_b = int(input("Enter ending port number (1 - 65535 greater than start port num): "))

    except:

        print("The input for starting port and ending port must be numeric.")

        sys.exit(1)

    # Check that starting port and ending port are between 1-65535

    if port_a not in range(1, 65535+1) or port_b not in range(1,65535+1):

        print("Starting port and ending prot must be between 1-65535.")

        sys.exit(1)

    if port_b <= port_a:

        print("Ending port number must be greater than starting port number.")

        sys.exit()

    # print info

    print('*'*30)

    print(f"List of open ports. Host:{ip} Start Port#:{port_a} End Port#:{port_b}")

    print(f"Start: {date.today()}")

    print('*'*30)

    # Save starting time

    start_time = time.time()

    for port in range(port_a, port_b+1): # iterate through ports

        print(f"Scanning port {port}", end="\r")

        try:

            a_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

            a_socket.settimeout(1)

            result = a_socket.connect_ex((ip, port))

            if result == 0: # port open

                print(f"{ip}:Port:{port}")

        except socket.error as e:

            #print("time out.")

            print(e)

        finally:

            a_socket.close()

    # Save ending time

    end_time = time.time()

    # Print time taken

    print("Time taken {:.2f} seconds".format(end_time-start_time))