checking number of connected users hotspot ubuntu 1

checking number of connected users hotspot ubuntu

#!/usr/bin/python3.6   
import subprocess
import re
import requests

# Store Mac address of all nodes here
saved = {
    'xx:xx:xx:xx:xx:xx': 'My laptop',
}

# Set wireless interface using ifconfig
interface = "wlp4s0"

mac_regex = re.compile(r'([a-zA-Z0-9]{2}:){5}[a-zA-Z0-9]{2}')


def parse_arp():
    arp_out = subprocess.check_output(f'arp -e -i {interface}', shell=True).decode('utf-8')
    if 'no match found' in arp_out:
        return None

    result = []
    for lines in arp_out.strip().split('\n'):
        line = lines.split()
        if interface in line and '(incomplete)' not in line:
            for element in line:
                # If its a mac addr
                if mac_regex.match(element):
                    result.append((line[0], element))
    return result


def get_mac_vendor(devices):
    num = 0
    for device in devices:
        try:
            url = f"http://api.macvendors.com/{device[1]}"
            try:
                vendor = requests.get(url).text
            except Exception as e:
                print(e)
                vendor = None

        except Exception as e:
            print("Error occured while getting mac vendor", e)

        num += 1
        print_device(device, num, vendor)

def print_device(device, num=0, vendor=None):
    device_name = saved[device[1]] if device[1] in saved else 'unrecognised !!'

    print(f'\n{num})', device_name,  '\nVendor:', vendor, '\nMac:', device[1], '\nIP: ',device[0])

if __name__ == '__main__':
    print('Retrieving connected devices ..')

    devices = parse_arp()

    if not devices:
        print('No devices found!')

    else:
        print('Retrieving mac vendors ..')
        try:
            get_mac_vendor(devices)

        except KeyboardInterrupt as e:
            num = 0
            for device in devices:
                num += 1
                print_device(device, num)

Here is what the above code is Doing:
1. It uses the arp command to get the list of devices connected to the network.
2. It then uses the macvendors.com API to get the vendor name of the device.
3. It then prints the device name, vendor name, mac address and IP address.

You can also add the name of the device in the saved dictionary.

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