Making magic with the network stack
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import socket
# Sending a SYN+ACK packet
def init_socket(): s = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_TCP) s.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1) return s
def send_raw_packet(): ip_header = b'\x45\x00\x00\x28' # Version, IHL, Type of Service | Total Length ip_header += b'\x00\x01\x00\x00' # Identification | Flags, Fragment Offset ip_header += b'\x28\x06\x95\x45' # TTL = 40s, Protocol = 6 for TCP | Header Checksum ip_header += b'\xc8\xcc\x0a\x0e' # Source Address: 200.204.10.14 ip_header += b'\xc8\xcc\x0a\x0c' # Destination Address: 200.204.10.12
tcp_header = b'\x11\x5c\x04\xD2' # Source Port | Destination Port tcp_header += b'\x00\x00\x00\x00' # Sequence Number tcp_header += b'\x00\x00\x00\x00' # Acknowledgement Number tcp_header += b'\x50\x11\x00\x00' # Data Offset, Reserved, Flags | Window Size tcp_header += b'\xa5\x41\x00\x00' # Checksum | Urgent Pointer
packet = ip_header + tcp_header return packet
if __name__=="__main__": dst_IP = '200.204.10.12'
s = init_socket()
packet = send_raw_packet() s.sendto(packet, (dst_IP, 0))
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