1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
* Copyright (c) 2013 Eric Leblond <eric@regit.org>
*
* Development of this code funded by Astaro AG (http://www.astaro.com/)
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables.h>
#include <net/netfilter/ipv4/nf_reject.h>
#include <net/netfilter/nft_reject.h>
static void nft_reject_ipv4_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
struct nft_reject *priv = nft_expr_priv(expr);
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
nf_send_unreach(pkt->skb, priv->icmp_code, nft_hook(pkt));
break;
case NFT_REJECT_TCP_RST:
nf_send_reset(nft_net(pkt), pkt->skb, nft_hook(pkt));
break;
default:
break;
}
regs->verdict.code = NF_DROP;
}
static struct nft_expr_type nft_reject_ipv4_type;
static const struct nft_expr_ops nft_reject_ipv4_ops = {
.type = &nft_reject_ipv4_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_reject)),
.eval = nft_reject_ipv4_eval,
.init = nft_reject_init,
.dump = nft_reject_dump,
.validate = nft_reject_validate,
};
static struct nft_expr_type nft_reject_ipv4_type __read_mostly = {
.family = NFPROTO_IPV4,
.name = "reject",
.ops = &nft_reject_ipv4_ops,
.policy = nft_reject_policy,
.maxattr = NFTA_REJECT_MAX,
.owner = THIS_MODULE,
};
static int __init nft_reject_ipv4_module_init(void)
{
return nft_register_expr(&nft_reject_ipv4_type);
}
static void __exit nft_reject_ipv4_module_exit(void)
{
nft_unregister_expr(&nft_reject_ipv4_type);
}
module_init(nft_reject_ipv4_module_init);
module_exit(nft_reject_ipv4_module_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_ALIAS_NFT_AF_EXPR(AF_INET, "reject");
|
