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NetworkPacketSniffer.py
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NetworkPacketSniffer.py
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import socket
import struct
import textwrap
TAB_1 = '\t [+] '
TAB_2 = '\t\t [-] '
TAB_3 = '\t\t\t [-] '
TAB_4 = '\t\t\t\t [-] '
DATA_TAB_1 = '\t '
DATA_TAB_2 = '\t\t '
DATA_TAB_3 = '\t\t\t '
DATA_TAB_4 = '\t\t\t\t '
def main():
Logo()
conn = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.ntohs(3))
print("SNIFFING HAS BEEN STARTED:")
while True:
raw_data, addr = conn.recvfrom(65536)
dest_mac, src_mac, eth_proto, data = ethernet_frame(raw_data)
print("\n[*] Ethernet Frame: ")
print("[*] Destination: {}, Source: {}, Protocol: {}".format(dest_mac, src_mac, eth_proto))
# 8 for IPv4
if eth_proto == 8:
(version, header_length, ttl, proto, src, target, data) = ipv4_packet(data)
print(TAB_1 + 'IPv4 Packet:')
print(TAB_2 + 'Version: {}, Header Length: {}, TTL: {}'.format(version, header_length, ttl))
print(TAB_2 + 'Protocol: {}, Source: {}, Target: {}'.format(proto, src, target))
# ICMP
if proto == 1:
icmp_type, code, checksum, data = icmp_packet(data)
print(TAB_1 + 'ICMP Packet:')
print(TAB_2 + 'Type: {}, code: {}, Checksum: {}'.format(icmp_type, code, checksum))
print(TAB_2 + 'Data: ')
print(format_multi_line(DATA_TAB_3, data))
# TCP
elif proto == 6:
(src_port, dest_port, sequence, acknowledgement, flag_urg, flag_ack, flag_psh, flag_rst, flag_syn,
flag_fin, data) = tcp_segment(data)
print("[*] TCP Segment:")
print(TAB_2 + "Source Port: {}, Destination port: {}".format(src_port, dest_port))
print(TAB_2 + "Sequence : {}, Acknowledgment: {},".format(sequence, acknowledgement))
print(TAB_2 + "Flags:")
print(
TAB_3 + "URG : {}, ACK :{}, PSH :{}, RST :{}, SYN :{}, FIN :{}".format(flag_urg, flag_ack, flag_psh,
flag_rst, flag_syn,
flag_fin))
print(TAB_2 + "Data: ")
print(format_multi_line(DATA_TAB_3, data))
# UDP
elif proto == 17:
src_port, dest_port, size, data = udp_segment(data)
print(TAB_1 + "UDP Segment:")
print(TAB_2 + "Source Port: {}, Destination Port: {}, Length: {}".format(src_port, dest_port, size))
print(TAB_2 + "Data: ")
print(format_multi_line(DATA_TAB_3, data))
# Other
else:
print(TAB_1 + "Data :")
print(format_multi_line(DATA_TAB_2, data))
else:
print('[*] Data :')
print(format_multi_line(DATA_TAB_1, data))
# Unpack ethernet frame
def ethernet_frame(data):
dest_mac, src_mac, proto = struct.unpack('! 6s 6s H', data[:14])
return get_mac_addr(dest_mac), get_mac_addr(src_mac), socket.htons(proto), data[14:]
# Return Properly The Mac Address(ie: AA:BB:CC:DD:EE:FF)
def get_mac_addr(byte_addr):
byte_str = map('{:02x}'.format, byte_addr)
mac_addr = ':'.join(byte_str).upper()
return mac_addr
# Unpack IPv4 packet
def ipv4_packet(data):
version_header_length = data[0]
version = version_header_length >> 4
header_length = (version_header_length & 15) * 4
ttl, proto, src, target = struct.unpack('! 8x B B 2x 4s 4s', data[:20])
return version, header_length, ttl, proto, ipv4(src), ipv4(target), data[header_length:]
# Return properly formatted IPv4 address
def ipv4(addr):
return '.'.join(map(str, addr))
# unpacks ICMP packet
def icmp_packet(data):
icmp_type, code, checksum = struct.unpack("! B B H", data[:4])
return icmp_type, code, checksum, data[4:]
# unpacks TCP segment
def tcp_segment(data):
(src_port, dest_port, sequence, acknowledgement, offset_reserved_flags) = struct.unpack("! H H L L H", data[:14])
offset = (offset_reserved_flags >> 12) * 4
flag_urg = (offset_reserved_flags & 32) >> 5
flag_ack = (offset_reserved_flags & 16) >> 4
flag_psh = (offset_reserved_flags & 8) >> 3
flag_rst = (offset_reserved_flags & 4) >> 2
flag_syn = (offset_reserved_flags & 2) >> 1
flag_fin = offset_reserved_flags & 1
return src_port, dest_port, sequence, acknowledgement, flag_urg, flag_ack, flag_psh, flag_rst, flag_syn, flag_fin, data[
offset:]
# Unpack UDP segment
def udp_segment(data):
src_port, dest_port, size = struct.unpack('! H H 2x H', data[:8])
return src_port, dest_port, size, data[8:]
# Formating Multi line data
def format_multi_line(prefix, string, size=80):
size -= len(prefix)
if isinstance(string, bytes):
string = ''.join(r'\x{:02x}'.format(byte) for byte in string)
if size % 2:
size -= 1
return '\n'.join([prefix + line for line in textwrap.wrap(string, size)])
def Logo():
print("______________________________________________________________")
print("| ")
print("| ⠀⠀⠀⠀⠀⠀⣠⣴⣾⣿⣿⣿⣿⣿⣿⣶⣤⣄⠀⠀⠀⠀⠀⠀⠀⠀ ")
print("| ⠀⠀⠀⠀⣠⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣶⣄⠀⠀⠀⠀⠀ ")
print("| ⠀⠀⣠⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣆⠉⠉⢉⣿⣿⣿⣷⣦⣄⡀⠀ ")
print("| ⠀⠚⢛⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄ ")
print("| ⠀⢠⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠿⠿⠿⠿⠿⣿⡇ ")
print("| ⢀⣿⡿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠋⠁⠀⠀⠀⠀⠀⠀⠈⠃ ")
print("| ⠸⠁⢀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ")
print("| ⠀⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ")
print("| ⠀⠀⠀⣿⣿⣿⡿⣿⣿⣿⣿⣿⣿⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ")
print("| ⠀⠀⠀⠹⣿⣿⡇⠈⠻⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ")
print("| ⠀⠀⠀⠀⠈⠻⡇⠀⠀⠈⠙⠿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ")
print("| _ _ __ ___ __ ______ _____ ")
print("| | | | | \ \ / / |/ / | ____| / ____|")
print("| | |__| | __ \ \ /\ / /| ' /_____| |__ _ _ ___| (___ ")
print("| | __ |/ _` \ \/ \/ / | <______| __|| | | |/ _ \\___ \ ")
print("| | | | | (_| |\ /\ / | . \ | |___| |_| | __/____) |")
print("| |_| |_|\__,_| \/ \/ |_|\_\ |______\__, |\___|_____/ ")
print("| __/ | ")
print("| |___/ ")
print("|============================================================|")
main()