linux/lib/test_blackhole_dev.c

// SPDX-License-Identifier: GPL-2.0
/*
 * This module tests the blackhole_dev that is created during the
 * net subsystem initialization. The test this module performs is
 * by injecting an skb into the stack with skb->dev as the
 * blackhole_dev and expects kernel to behave in a sane manner
 * (in other words, *not crash*)!
 *
 * Copyright (c) 2018, Mahesh Bandewar <[email protected]>
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/printk.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/udp.h>
#include <linux/ipv6.h>

#include <net/dst.h>

#define SKB_SIZE …
#define HEAD_SIZE …
#define TAIL_SIZE …

#define UDP_PORT …

static int __init test_blackholedev_init(void)
{ … }

static void __exit test_blackholedev_exit(void)
{ … }

module_init(test_blackholedev_init);
module_exit(test_blackholedev_exit);

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;