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Linux/net/netfilter/nf_dup_netdev.c

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  1 /*
  2  * Copyright (c) 2015 Pablo Neira Ayuso <pablo@netfilter.org>
  3  *
  4  * This program is free software; you can redistribute it and/or modify it
  5  * under the terms of the GNU General Public License version 2 as published by
  6  * the Free Software Foundation.
  7  */
  8 
  9 #include <linux/kernel.h>
 10 #include <linux/init.h>
 11 #include <linux/module.h>
 12 #include <linux/netlink.h>
 13 #include <linux/netfilter.h>
 14 #include <linux/netfilter/nf_tables.h>
 15 #include <net/netfilter/nf_tables.h>
 16 
 17 void nf_dup_netdev_egress(const struct nft_pktinfo *pkt, int oif)
 18 {
 19         struct net_device *dev;
 20         struct sk_buff *skb;
 21 
 22         dev = dev_get_by_index_rcu(pkt->net, oif);
 23         if (dev == NULL)
 24                 return;
 25 
 26         skb = skb_clone(pkt->skb, GFP_ATOMIC);
 27         if (skb == NULL)
 28                 return;
 29 
 30         if (skb_mac_header_was_set(skb))
 31                 skb_push(skb, skb->mac_len);
 32 
 33         skb->dev = dev;
 34         dev_queue_xmit(skb);
 35 }
 36 EXPORT_SYMBOL_GPL(nf_dup_netdev_egress);
 37 
 38 MODULE_LICENSE("GPL");
 39 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
 40 

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