import socket

# Fill in the right target here
HOST = "netsec.net.in.tum.de"
PORT = 20203


def create_packet(src_ip, dst_ip, protocol, src_port, dst_port) -> str:
    return f"{src_ip},{dst_ip},{protocol},{src_port},{dst_port}"


def get_flag():
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    s.connect((HOST, PORT))
    sf = s.makefile("rw")  # we use a file abstraction for the sockets
    # TODO
    src_ip = "161.40.12.151"
    dst_ip = "10.0.0.1"
    protocol = "TCP"
    src_port = 7331
    dst_port = 1337
    packet = create_packet(src_ip, dst_ip, protocol, src_port, dst_port)
    print(f"Sending packet: {packet}")
    sf.write(packet + "\n")
    sf.flush()
    response = sf.readline().strip()
    print(f"Server response: {response}")


if __name__ == "__main__":
    get_flag()