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96518518 PM |
1 | /* |
2 | * Copyright (c) 2008 Patrick McHardy <kaber@trash.net> | |
9370761c | 3 | * Copyright (c) 2012-2013 Pablo Neira Ayuso <pablo@netfilter.org> |
96518518 PM |
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 | * Development of this code funded by Astaro AG (http://www.astaro.com/) | |
10 | */ | |
11 | ||
12 | #include <linux/init.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/ipv6.h> | |
15 | #include <linux/netfilter_ipv6.h> | |
16 | #include <net/netfilter/nf_tables.h> | |
0ca743a5 | 17 | #include <net/netfilter/nf_tables_ipv6.h> |
96518518 | 18 | |
3b088c4b PM |
19 | static unsigned int nft_do_chain_ipv6(const struct nf_hook_ops *ops, |
20 | struct sk_buff *skb, | |
238e54c9 | 21 | const struct nf_hook_state *state) |
3b088c4b PM |
22 | { |
23 | struct nft_pktinfo pkt; | |
24 | ||
25 | /* malformed packet, drop it */ | |
238e54c9 | 26 | if (nft_set_pktinfo_ipv6(&pkt, ops, skb, state->in, state->out) < 0) |
3b088c4b PM |
27 | return NF_DROP; |
28 | ||
3876d22d | 29 | return nft_do_chain(&pkt, ops); |
3b088c4b PM |
30 | } |
31 | ||
96518518 PM |
32 | static unsigned int nft_ipv6_output(const struct nf_hook_ops *ops, |
33 | struct sk_buff *skb, | |
238e54c9 | 34 | const struct nf_hook_state *state) |
96518518 PM |
35 | { |
36 | if (unlikely(skb->len < sizeof(struct ipv6hdr))) { | |
37 | if (net_ratelimit()) | |
38 | pr_info("nf_tables_ipv6: ignoring short SOCK_RAW " | |
39 | "packet\n"); | |
40 | return NF_ACCEPT; | |
41 | } | |
42 | ||
238e54c9 | 43 | return nft_do_chain_ipv6(ops, skb, state); |
96518518 PM |
44 | } |
45 | ||
1d49144c | 46 | struct nft_af_info nft_af_ipv6 __read_mostly = { |
96518518 PM |
47 | .family = NFPROTO_IPV6, |
48 | .nhooks = NF_INET_NUMHOOKS, | |
49 | .owner = THIS_MODULE, | |
115a60b1 | 50 | .nops = 1, |
96518518 | 51 | .hooks = { |
3b088c4b | 52 | [NF_INET_LOCAL_IN] = nft_do_chain_ipv6, |
96518518 | 53 | [NF_INET_LOCAL_OUT] = nft_ipv6_output, |
3b088c4b PM |
54 | [NF_INET_FORWARD] = nft_do_chain_ipv6, |
55 | [NF_INET_PRE_ROUTING] = nft_do_chain_ipv6, | |
56 | [NF_INET_POST_ROUTING] = nft_do_chain_ipv6, | |
96518518 PM |
57 | }, |
58 | }; | |
1d49144c | 59 | EXPORT_SYMBOL_GPL(nft_af_ipv6); |
96518518 | 60 | |
99633ab2 PNA |
61 | static int nf_tables_ipv6_init_net(struct net *net) |
62 | { | |
63 | net->nft.ipv6 = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL); | |
64 | if (net->nft.ipv6 == NULL) | |
65 | return -ENOMEM; | |
66 | ||
67 | memcpy(net->nft.ipv6, &nft_af_ipv6, sizeof(nft_af_ipv6)); | |
68 | ||
69 | if (nft_register_afinfo(net, net->nft.ipv6) < 0) | |
70 | goto err; | |
71 | ||
72 | return 0; | |
73 | err: | |
74 | kfree(net->nft.ipv6); | |
75 | return -ENOMEM; | |
76 | } | |
77 | ||
78 | static void nf_tables_ipv6_exit_net(struct net *net) | |
79 | { | |
80 | nft_unregister_afinfo(net->nft.ipv6); | |
81 | kfree(net->nft.ipv6); | |
82 | } | |
83 | ||
84 | static struct pernet_operations nf_tables_ipv6_net_ops = { | |
85 | .init = nf_tables_ipv6_init_net, | |
86 | .exit = nf_tables_ipv6_exit_net, | |
87 | }; | |
88 | ||
2a37d755 | 89 | static const struct nf_chain_type filter_ipv6 = { |
9370761c PNA |
90 | .name = "filter", |
91 | .type = NFT_CHAIN_T_DEFAULT, | |
fa2c1de0 PM |
92 | .family = NFPROTO_IPV6, |
93 | .owner = THIS_MODULE, | |
9370761c PNA |
94 | .hook_mask = (1 << NF_INET_LOCAL_IN) | |
95 | (1 << NF_INET_LOCAL_OUT) | | |
96 | (1 << NF_INET_FORWARD) | | |
97 | (1 << NF_INET_PRE_ROUTING) | | |
98 | (1 << NF_INET_POST_ROUTING), | |
9370761c PNA |
99 | }; |
100 | ||
96518518 PM |
101 | static int __init nf_tables_ipv6_init(void) |
102 | { | |
cf4dfa85 PNA |
103 | int ret; |
104 | ||
9370761c | 105 | nft_register_chain_type(&filter_ipv6); |
cf4dfa85 PNA |
106 | ret = register_pernet_subsys(&nf_tables_ipv6_net_ops); |
107 | if (ret < 0) | |
108 | nft_unregister_chain_type(&filter_ipv6); | |
109 | ||
110 | return ret; | |
96518518 | 111 | } |
99633ab2 | 112 | |
96518518 PM |
113 | static void __exit nf_tables_ipv6_exit(void) |
114 | { | |
99633ab2 | 115 | unregister_pernet_subsys(&nf_tables_ipv6_net_ops); |
9370761c | 116 | nft_unregister_chain_type(&filter_ipv6); |
96518518 PM |
117 | } |
118 | ||
119 | module_init(nf_tables_ipv6_init); | |
120 | module_exit(nf_tables_ipv6_exit); | |
121 | ||
122 | MODULE_LICENSE("GPL"); | |
123 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
124 | MODULE_ALIAS_NFT_FAMILY(AF_INET6); |