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,
51 static struct nft_expr_type nft_reject_ipv4_type __read_mostly = {
52 .family = NFPROTO_IPV4,
54 .ops = &nft_reject_ipv4_ops,
55 .policy = nft_reject_policy,
56 .maxattr = NFTA_REJECT_MAX,
60 static int __init nft_reject_ipv4_module_init(void)
62 return nft_register_expr(&nft_reject_ipv4_type);
65 static void __exit nft_reject_ipv4_module_exit(void)
67 nft_unregister_expr(&nft_reject_ipv4_type);
70 module_init(nft_reject_ipv4_module_init);
71 module_exit(nft_reject_ipv4_module_exit);
73 MODULE_LICENSE("GPL");
74 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
75 MODULE_ALIAS_NFT_AF_EXPR(AF_INET, "reject");