mirror of
https://github.com/autistic-symposium/web3-starter-py.git
synced 2025-05-17 06:02:12 -04:00
69 lines
No EOL
1.8 KiB
Python
69 lines
No EOL
1.8 KiB
Python
import os
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import time
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import socket
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import struct
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import ctypes
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import threading
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from netaddr import IPNetwork, IPAddress
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from ICMPHeader import ICMP
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# host to listen on
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HOST = '192.168.1.114'
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# subnet to target (iterates through all IP address in this subnet)
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SUBNET = '192.168.1.0/24'
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# string signature
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MESSAGE = 'hellooooo'
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def udp_sender(SUBNET, MESSAGE):
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''' Sprays out the udp datagram'''
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time.sleep(5)
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sender = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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for ip in IPNetwork(SUBNET):
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try:
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sender.sendto(MESSAGE, (str(ip), 65212))
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except:
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pass
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def main():
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t = threading.Thread(target=udp_sender, args=(SUBNET, MESSAGE))
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t.start()
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socket_protocol = socket.IPPROTO_ICMP
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sniffer = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket_protocol)
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sniffer.bind(( HOST, 0 ))
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sniffer.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)
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# continually read in packets and parse their information
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while True:
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raw_buffer = sniffer.recvfrom(65565)[0]
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ip_header = raw_buffer[0:20]
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iph = struct.unpack('!BBHHHBBH4s4s' , ip_header)
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# Create our IP structure
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version_ihl = iph[0]
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ihl = version_ihl & 0xF
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iph_length = ihl * 4
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src_addr = socket.inet_ntoa(iph[8]);
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# Create our ICMP structure
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buf = raw_buffer[iph_length:iph_length + ctypes.sizeof(ICMP)]
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icmp_header = ICMP(buf)
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# check for the type 3 and code and within our target subnet
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if icmp_header.code == 3 and icmp_header.type == 3:
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if IPAddress(src_addr) in IPNetwork(SUBNET):
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if raw_buffer[len(raw_buffer) - len(MESSAGE):] == MESSAGE:
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print(f'Host up: {src_addr}')
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if __name__ == '__main__':
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main() |