scanner.py

import subprocess
import ipaddress
import json
from datetime import datetime

# Validate - Ask for subnet and validate it
while True:
    # Ask user for a subnet
    subnet = input("Enter a subnet (e.g. 192.168.1.0/30): ")

    try:
        # Convert the text into a network object
        network = ipaddress.ip_network(subnet, strict=False)
        break
    except ValueError:
        print("Invalid subnet. Please try again...")

# New list for storing the results and starting timestamp
results = []
scan_start = datetime.now().isoformat(timespec="seconds")

# Function to ping one IP
def ping_ip(ip_str):
    try:
        result = subprocess.run(
            ["ping", "-n", "1", "-w", "2000", ip_str],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            text=True,
            timeout=3
        )

        output = result.stdout

        if "TTL" in output:
            status = "UP"
        else:
            status = "DOWN"
    except subprocess.TimeoutExpired:
        status = "DOWN (timeout)"
    except Exception as e:
        status = f"ERROR: {str(e)}"

#  Main loop: Scan all usuable IP addresses
for ip in network.hosts():
    ip_str = str(ip)
    print("Pinging: ", ip_str)

    status = ping_ip(ip_str)

    print(ip_str, " is ", status)
    print("----------------------")

    # Store results as an object
    results.append({
        "ip: ": ip_str, 
        "status ": status,
        "timestamp: ": datetime.now().isoformat(timespec="seconds")
        })
    
# JSON structure
output_data = {
    "subnet: ": subnet,
    "scan_started_at: ": scan_start,
    "scan_finished_at: ": datetime.now().isoformat(timespec="seconds"),
    "results :": results
}

# Save to JSON file
with open("results.json", "w") as file:
    json.dump(results, file, indent=4)

print("Scan complete. Results saved to results.json")