Um scanner DHCP feito com scrapy que verifica conexões na rede e pega algumas informações com endereço MAC.
Um teste prático é iniciá-lo na sua rede e desconectar um dispositivo, como por exemplo seu celular e reconctá-lo que a magica acontece.

Nunca use para meios ilegais!

• Download dhcps.py
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Esconder código-fonte

#!/bin/python3
from scapy.all import *
import time
red   = "\033[1;31m"
blue  = "\033[1;34m"
cyan  = "\033[1;36m"
green = "\033[0;32m"
reset = "\033[0;0m"
bold  = "\033[;1m"
reverse = "\033[;7m"
branco = "\033[37m"
gray = "\033[0;37m"
orange = "\033[0;49;33m"
yellow = "\033[0;49;93m"
def init():
    print('-'*66)
    print(yellow, """\n\n .sSSSSs.    .sSSS SSSSS .sSSSSs.    .sSSSSs.    .sSSSSs.    
 SSSSSSSSSs. SSSSS SSSSS SSSSSSSSSs. SSSSSSSSSs. SSSSSSSSSs. 
 S SSS SSSSS S SSS SSSSS S SSS SSSSS S SSS SSSSS S SSS SSSS' 
 S  SS SSSSS S  SS SSSSS S  SS SSSS' S  SS SSSSS S  SS       
 S..SS SSSSS S..SSsSSSSS S..SS       S..SS SSSSS `SSSSsSSSa. 
 S:::S SSSSS S:::S SSSSS S:::S SSSSS S:::SsSSSSS .sSSS SSSSS 
 S;;;S SSSSS S;;;S SSSSS S;;;S SSSSS S;;;S       S;;;S SSSSS 
 S%%%S SSSS' S%%%S SSSSS S%%%S SSSSS S%%%S       S%%%S SSSSS 
 SSSSSsS;:'  SSSSS SSSSS SSSSSsSSSSS SSSSS       SSSSSsSSSSS\n\n""", reset)

def listen_dhcp():
    # Make sure it is DHCP with the filter options
    sniff(prn=print_packet, filter='udp and (port 67 or port 68)')


def print_packet(packet):
    # initialize these variables to None at first
    target_mac, requested_ip, hostname, vendor_id = [None] * 4
    # get the MAC address of the requester
    if packet.haslayer(Ether):
        target_mac = packet.getlayer(Ether).src
    # get the DHCP options
    dhcp_options = packet[DHCP].options
    for item in dhcp_options:
        try:
            label, value = item
        except ValueError:
            continue
        if label == 'requested_addr':
            # get the requested IP
            requested_ip = value
        elif label == 'hostname':
            # get the hostname of the device
            hostname = value.decode()
        elif label == 'vendor_class_id':
            # get the vendor ID
            vendor_id = value.decode()
    if target_mac and vendor_id and hostname and requested_ip:
        # if all variables are not None, print the device details
        time_now = time.strftime("[%H:%M:%S]")
        print(red,f"|   {time_now} : {target_mac}  -  {hostname} / {vendor_id} requested {requested_ip}    | -**-", reset)
        print(blue, '|                                                                                                               | -**-', reset)


if __name__ == "__main__":
    init()
    listen_dhcp()
print('-'*66)

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