Drottarutarnum

static ssize_t mydev_write(struct file * filep, const char * buffer, size_t len, loff_t * offset) {
	copy_from_user(ips[i], buffer, 256);
	printk(KERN_INFO "ips: %s \n", ips[i]);

	i++;
	if (strncmp(ips[0], "wh", 2) == 0) {
		BORW = 0;
		if (nf_register_net_hook( & init_net, &w_drop) {
			printk(KERN_ALERT "FAILED\n");
		}
		printk(KERN_INFO "white list\n");
		return len;
	}

	if (strncmp(ips[0], "bl", 2) == 0) {
		BORW = 1;
		if (nf_register_net_hook( & init_net, &b_drop)) {
			printk(KERN_ALERT "FAILED\n");
		}
		printk(KERN_INFO "block list\n");
		return len;
	}

	BORW = 1;
	if (nf_register_net_hook( & init_net, &b_drop)) {
		printk(KERN_ALERT "FAILED\n");
	}
	printk(KERN_INFO "defult is block list\n");

	return len;
}