]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blame - net/ipv4/netfilter/nft_chain_route_ipv4.c
Merge tag 'omap-for-v5.0/fixes-rc7-signed' of git://git.kernel.org/pub/scm/linux...
[mirror_ubuntu-eoan-kernel.git] / net / ipv4 / netfilter / nft_chain_route_ipv4.c
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1/*
2 * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
9370761c 3 * Copyright (c) 2012 Pablo Neira Ayuso <pablo@netfilter.org>
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4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/list.h>
13#include <linux/skbuff.h>
14#include <linux/netlink.h>
15#include <linux/netfilter.h>
16#include <linux/netfilter_ipv4.h>
17#include <linux/netfilter/nfnetlink.h>
18#include <linux/netfilter/nf_tables.h>
19#include <net/netfilter/nf_tables.h>
0ca743a5 20#include <net/netfilter/nf_tables_ipv4.h>
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21#include <net/route.h>
22#include <net/ip.h>
23
06198b34 24static unsigned int nf_route_table_hook(void *priv,
96518518 25 struct sk_buff *skb,
238e54c9 26 const struct nf_hook_state *state)
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27{
28 unsigned int ret;
0ca743a5 29 struct nft_pktinfo pkt;
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30 u32 mark;
31 __be32 saddr, daddr;
32 u_int8_t tos;
33 const struct iphdr *iph;
d1a6cba5 34 int err;
96518518 35
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36 nft_set_pktinfo(&pkt, skb, state);
37 nft_set_pktinfo_ipv4(&pkt, skb);
0ca743a5 38
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39 mark = skb->mark;
40 iph = ip_hdr(skb);
41 saddr = iph->saddr;
42 daddr = iph->daddr;
43 tos = iph->tos;
44
06198b34 45 ret = nft_do_chain(&pkt, priv);
d1a6cba5 46 if (ret != NF_DROP && ret != NF_STOLEN) {
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47 iph = ip_hdr(skb);
48
49 if (iph->saddr != saddr ||
50 iph->daddr != daddr ||
51 skb->mark != mark ||
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52 iph->tos != tos) {
53 err = ip_route_me_harder(state->net, skb, RTN_UNSPEC);
54 if (err < 0)
55 ret = NF_DROP_ERR(err);
56 }
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57 }
58 return ret;
59}
60
32537e91 61static const struct nft_chain_type nft_chain_route_ipv4 = {
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62 .name = "route",
63 .type = NFT_CHAIN_T_ROUTE,
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64 .family = NFPROTO_IPV4,
65 .owner = THIS_MODULE,
9370761c 66 .hook_mask = (1 << NF_INET_LOCAL_OUT),
fa2c1de0 67 .hooks = {
9370761c 68 [NF_INET_LOCAL_OUT] = nf_route_table_hook,
96518518 69 },
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70};
71
9370761c 72static int __init nft_chain_route_init(void)
96518518 73{
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74 nft_register_chain_type(&nft_chain_route_ipv4);
75
76 return 0;
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77}
78
9370761c 79static void __exit nft_chain_route_exit(void)
96518518 80{
9370761c 81 nft_unregister_chain_type(&nft_chain_route_ipv4);
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82}
83
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84module_init(nft_chain_route_init);
85module_exit(nft_chain_route_exit);
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86
87MODULE_LICENSE("GPL");
88MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
9370761c 89MODULE_ALIAS_NFT_CHAIN(AF_INET, "route");