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 #include <net/netfilter/nf_dup_netdev.h> 17 18 static void nf_do_netdev_egress(struct sk_buff *skb, struct net_device *dev) 19 { 20 if (skb_mac_header_was_set(skb)) 21 skb_push(skb, skb->mac_len); 22 23 skb->dev = dev; 24 dev_queue_xmit(skb); 25 } 26 27 void nf_fwd_netdev_egress(const struct nft_pktinfo *pkt, int oif) 28 { 29 struct net_device *dev; 30 31 dev = dev_get_by_index_rcu(nft_net(pkt), oif); 32 if (!dev) { 33 kfree_skb(pkt->skb); 34 return; 35 } 36 37 nf_do_netdev_egress(pkt->skb, dev); 38 } 39 EXPORT_SYMBOL_GPL(nf_fwd_netdev_egress); 40 41 void nf_dup_netdev_egress(const struct nft_pktinfo *pkt, int oif) 42 { 43 struct net_device *dev; 44 struct sk_buff *skb; 45 46 dev = dev_get_by_index_rcu(nft_net(pkt), oif); 47 if (dev == NULL) 48 return; 49 50 skb = skb_clone(pkt->skb, GFP_ATOMIC); 51 if (skb) 52 nf_do_netdev_egress(skb, dev); 53 } 54 EXPORT_SYMBOL_GPL(nf_dup_netdev_egress); 55 56 MODULE_LICENSE("GPL"); 57 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>"); 58