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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/nft_reject.h>
17#include <net/netfilter/ipv6/nf_reject.h>
18
19static void nft_reject_ipv6_eval(const struct nft_expr *expr,
20 struct nft_regs *regs,
21 const struct nft_pktinfo *pkt)
22{
23 struct nft_reject *priv = nft_expr_priv(expr);
24
25 switch (priv->type) {
26 case NFT_REJECT_ICMP_UNREACH:
27 nf_send_unreach6(nft_net(pkt), pkt->skb, priv->icmp_code,
28 nft_hook(pkt));
29 break;
30 case NFT_REJECT_TCP_RST:
31 nf_send_reset6(nft_net(pkt), nft_sk(pkt), pkt->skb,
32 nft_hook(pkt));
33 break;
34 default:
35 break;
36 }
37
38 regs->verdict.code = NF_DROP;
39}
40
41static struct nft_expr_type nft_reject_ipv6_type;
42static const struct nft_expr_ops nft_reject_ipv6_ops = {
43 .type = &nft_reject_ipv6_type,
44 .size = NFT_EXPR_SIZE(sizeof(struct nft_reject)),
45 .eval = nft_reject_ipv6_eval,
46 .init = nft_reject_init,
47 .dump = nft_reject_dump,
48 .validate = nft_reject_validate,
49};
50
51static struct nft_expr_type nft_reject_ipv6_type __read_mostly = {
52 .family = NFPROTO_IPV6,
53 .name = "reject",
54 .ops = &nft_reject_ipv6_ops,
55 .policy = nft_reject_policy,
56 .maxattr = NFTA_REJECT_MAX,
57 .owner = THIS_MODULE,
58};
59
60static int __init nft_reject_ipv6_module_init(void)
61{
62 return nft_register_expr(&nft_reject_ipv6_type);
63}
64
65static void __exit nft_reject_ipv6_module_exit(void)
66{
67 nft_unregister_expr(&nft_reject_ipv6_type);
68}
69
70module_init(nft_reject_ipv6_module_init);
71module_exit(nft_reject_ipv6_module_exit);
72
73MODULE_LICENSE("GPL");
74MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
75MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "reject");
76MODULE_DESCRIPTION("IPv6 packet rejection for nftables");
77