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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
cc4723ca PM |
2 | /* |
3 | * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net> | |
4 | * Copyright (c) 2013 Eric Leblond <eric@regit.org> | |
5 | * | |
cc4723ca PM |
6 | * Development of this code funded by Astaro AG (http://www.astaro.com/) |
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> | |
cc4723ca PM |
16 | #include <net/netfilter/ipv4/nf_reject.h> |
17 | #include <net/netfilter/nft_reject.h> | |
18 | ||
56768644 | 19 | static void nft_reject_ipv4_eval(const struct nft_expr *expr, |
a55e22e9 | 20 | struct nft_regs *regs, |
56768644 | 21 | const struct nft_pktinfo *pkt) |
cc4723ca PM |
22 | { |
23 | struct nft_reject *priv = nft_expr_priv(expr); | |
24 | ||
25 | switch (priv->type) { | |
26 | case NFT_REJECT_ICMP_UNREACH: | |
0e5a1c7e | 27 | nf_send_unreach(pkt->skb, priv->icmp_code, nft_hook(pkt)); |
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28 | break; |
29 | case NFT_REJECT_TCP_RST: | |
0e5a1c7e | 30 | nf_send_reset(nft_net(pkt), pkt->skb, nft_hook(pkt)); |
cc4723ca | 31 | break; |
c1f86676 DM |
32 | default: |
33 | break; | |
cc4723ca PM |
34 | } |
35 | ||
a55e22e9 | 36 | regs->verdict.code = NF_DROP; |
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37 | } |
38 | ||
39 | static struct nft_expr_type nft_reject_ipv4_type; | |
40 | static const struct nft_expr_ops nft_reject_ipv4_ops = { | |
41 | .type = &nft_reject_ipv4_type, | |
42 | .size = NFT_EXPR_SIZE(sizeof(struct nft_reject)), | |
43 | .eval = nft_reject_ipv4_eval, | |
44 | .init = nft_reject_init, | |
45 | .dump = nft_reject_dump, | |
89e1f6d2 | 46 | .validate = nft_reject_validate, |
cc4723ca PM |
47 | }; |
48 | ||
49 | static struct nft_expr_type nft_reject_ipv4_type __read_mostly = { | |
50 | .family = NFPROTO_IPV4, | |
51 | .name = "reject", | |
52 | .ops = &nft_reject_ipv4_ops, | |
53 | .policy = nft_reject_policy, | |
54 | .maxattr = NFTA_REJECT_MAX, | |
55 | .owner = THIS_MODULE, | |
56 | }; | |
57 | ||
58 | static int __init nft_reject_ipv4_module_init(void) | |
59 | { | |
60 | return nft_register_expr(&nft_reject_ipv4_type); | |
61 | } | |
62 | ||
63 | static void __exit nft_reject_ipv4_module_exit(void) | |
64 | { | |
65 | nft_unregister_expr(&nft_reject_ipv4_type); | |
66 | } | |
67 | ||
68 | module_init(nft_reject_ipv4_module_init); | |
69 | module_exit(nft_reject_ipv4_module_exit); | |
70 | ||
71 | MODULE_LICENSE("GPL"); | |
72 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
73 | MODULE_ALIAS_NFT_AF_EXPR(AF_INET, "reject"); |