2 * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
3 * Copyright (c) 2013 Eric Leblond <eric@regit.org>
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.
9 * Development of this code funded by Astaro AG (http://www.astaro.com/)
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/netlink.h>
16 #include <linux/netfilter.h>
17 #include <linux/netfilter/nf_tables.h>
18 #include <net/netfilter/nf_tables.h>
19 #include <net/netfilter/ipv4/nf_reject.h>
20 #include <net/netfilter/nft_reject.h>
22 static void nft_reject_ipv4_eval(const struct nft_expr
*expr
,
23 struct nft_regs
*regs
,
24 const struct nft_pktinfo
*pkt
)
26 struct nft_reject
*priv
= nft_expr_priv(expr
);
29 case NFT_REJECT_ICMP_UNREACH
:
30 nf_send_unreach(pkt
->skb
, priv
->icmp_code
, pkt
->hook
);
32 case NFT_REJECT_TCP_RST
:
33 nf_send_reset(pkt
->net
, pkt
->skb
, pkt
->hook
);
39 regs
->verdict
.code
= NF_DROP
;
42 static struct nft_expr_type nft_reject_ipv4_type
;
43 static const struct nft_expr_ops nft_reject_ipv4_ops
= {
44 .type
= &nft_reject_ipv4_type
,
45 .size
= NFT_EXPR_SIZE(sizeof(struct nft_reject
)),
46 .eval
= nft_reject_ipv4_eval
,
47 .init
= nft_reject_init
,
48 .dump
= nft_reject_dump
,
49 .validate
= nft_reject_validate
,
52 static struct nft_expr_type nft_reject_ipv4_type __read_mostly
= {
53 .family
= NFPROTO_IPV4
,
55 .ops
= &nft_reject_ipv4_ops
,
56 .policy
= nft_reject_policy
,
57 .maxattr
= NFTA_REJECT_MAX
,
61 static int __init
nft_reject_ipv4_module_init(void)
63 return nft_register_expr(&nft_reject_ipv4_type
);
66 static void __exit
nft_reject_ipv4_module_exit(void)
68 nft_unregister_expr(&nft_reject_ipv4_type
);
71 module_init(nft_reject_ipv4_module_init
);
72 module_exit(nft_reject_ipv4_module_exit
);
74 MODULE_LICENSE("GPL");
75 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
76 MODULE_ALIAS_NFT_AF_EXPR(AF_INET
, "reject");