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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
502061f8 PNA |
2 | /* |
3 | * Copyright (c) 2015 Pablo Neira Ayuso <pablo@netfilter.org> | |
502061f8 PNA |
4 | */ |
5 | ||
6 | #include <linux/kernel.h> | |
7 | #include <linux/init.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/netlink.h> | |
10 | #include <linux/netfilter.h> | |
11 | #include <linux/netfilter/nf_tables.h> | |
12 | #include <net/netfilter/nf_tables.h> | |
be2861dc | 13 | #include <net/netfilter/nf_tables_offload.h> |
a32770b1 | 14 | #include <net/netfilter/nf_dup_netdev.h> |
502061f8 | 15 | |
3bf32761 FW |
16 | static void nf_do_netdev_egress(struct sk_buff *skb, struct net_device *dev) |
17 | { | |
18 | if (skb_mac_header_was_set(skb)) | |
19 | skb_push(skb, skb->mac_len); | |
20 | ||
21 | skb->dev = dev; | |
22 | dev_queue_xmit(skb); | |
23 | } | |
24 | ||
25 | void nf_fwd_netdev_egress(const struct nft_pktinfo *pkt, int oif) | |
26 | { | |
27 | struct net_device *dev; | |
28 | ||
29 | dev = dev_get_by_index_rcu(nft_net(pkt), oif); | |
30 | if (!dev) { | |
31 | kfree_skb(pkt->skb); | |
32 | return; | |
33 | } | |
34 | ||
35 | nf_do_netdev_egress(pkt->skb, dev); | |
36 | } | |
37 | EXPORT_SYMBOL_GPL(nf_fwd_netdev_egress); | |
38 | ||
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39 | void nf_dup_netdev_egress(const struct nft_pktinfo *pkt, int oif) |
40 | { | |
41 | struct net_device *dev; | |
42 | struct sk_buff *skb; | |
43 | ||
0e5a1c7e | 44 | dev = dev_get_by_index_rcu(nft_net(pkt), oif); |
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45 | if (dev == NULL) |
46 | return; | |
47 | ||
48 | skb = skb_clone(pkt->skb, GFP_ATOMIC); | |
3bf32761 FW |
49 | if (skb) |
50 | nf_do_netdev_egress(skb, dev); | |
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51 | } |
52 | EXPORT_SYMBOL_GPL(nf_dup_netdev_egress); | |
53 | ||
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54 | int nft_fwd_dup_netdev_offload(struct nft_offload_ctx *ctx, |
55 | struct nft_flow_rule *flow, | |
56 | enum flow_action_id id, int oif) | |
57 | { | |
58 | struct flow_action_entry *entry; | |
59 | struct net_device *dev; | |
60 | ||
61 | /* nft_flow_rule_destroy() releases the reference on this device. */ | |
62 | dev = dev_get_by_index(ctx->net, oif); | |
63 | if (!dev) | |
64 | return -EOPNOTSUPP; | |
65 | ||
66 | entry = &flow->rule->action.entries[ctx->num_actions++]; | |
67 | entry->id = id; | |
68 | entry->dev = dev; | |
69 | ||
70 | return 0; | |
71 | } | |
72 | EXPORT_SYMBOL_GPL(nft_fwd_dup_netdev_offload); | |
73 | ||
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74 | MODULE_LICENSE("GPL"); |
75 | MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>"); |