Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

Open Menu /net/netfilter/nf_dup_netdev.c 
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
/*
 * Copyright (c) 2015 Pablo Neira Ayuso <pablo@netfilter.org>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables.h>

static void nf_do_netdev_egress(struct sk_buff *skb, struct net_device *dev)
{
	if (skb_mac_header_was_set(skb))
		skb_push(skb, skb->mac_len);

	skb->dev = dev;
	dev_queue_xmit(skb);
}

void nf_fwd_netdev_egress(const struct nft_pktinfo *pkt, int oif)
{
	struct net_device *dev;

	dev = dev_get_by_index_rcu(nft_net(pkt), oif);
	if (!dev) {
		kfree_skb(pkt->skb);
		return;
	}

	nf_do_netdev_egress(pkt->skb, dev);
}
EXPORT_SYMBOL_GPL(nf_fwd_netdev_egress);

void nf_dup_netdev_egress(const struct nft_pktinfo *pkt, int oif)
{
	struct net_device *dev;
	struct sk_buff *skb;

	dev = dev_get_by_index_rcu(nft_net(pkt), oif);
	if (dev == NULL)
		return;

	skb = skb_clone(pkt->skb, GFP_ATOMIC);
	if (skb)
		nf_do_netdev_egress(skb, dev);
}
EXPORT_SYMBOL_GPL(nf_dup_netdev_egress);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");