Release 4.11 net/netfilter/nft_reject_inet.c
/*
* Copyright (c) 2014 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#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/nft_reject.h>
#include <net/netfilter/ipv4/nf_reject.h>
#include <net/netfilter/ipv6/nf_reject.h>
static void nft_reject_inet_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
struct nft_reject *priv = nft_expr_priv(expr);
switch (nft_pf(pkt)) {
case NFPROTO_IPV4:
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;
case NFT_REJECT_ICMPX_UNREACH:
nf_send_unreach(pkt->skb,
nft_reject_icmp_code(priv->icmp_code),
nft_hook(pkt));
break;
}
break;
case NFPROTO_IPV6:
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
nf_send_unreach6(nft_net(pkt), pkt->skb,
priv->icmp_code, nft_hook(pkt));
break;
case NFT_REJECT_TCP_RST:
nf_send_reset6(nft_net(pkt), pkt->skb, nft_hook(pkt));
break;
case NFT_REJECT_ICMPX_UNREACH:
nf_send_unreach6(nft_net(pkt), pkt->skb,
nft_reject_icmpv6_code(priv->icmp_code),
nft_hook(pkt));
break;
}
break;
}
regs->verdict.code = NF_DROP;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Pablo Neira Ayuso | 155 | 73.11% | 2 | 28.57% |
Patrick McHardy | 47 | 22.17% | 2 | 28.57% |
Eric W. Biedermann | 6 | 2.83% | 2 | 28.57% |
Florian Westphal | 4 | 1.89% | 1 | 14.29% |
Total | 212 | 100.00% | 7 | 100.00% |
static int nft_reject_inet_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_reject *priv = nft_expr_priv(expr);
int icmp_code, err;
err = nft_reject_validate(ctx, expr, NULL);
if (err < 0)
return err;
if (tb[NFTA_REJECT_TYPE] == NULL)
return -EINVAL;
priv->type = ntohl(nla_get_be32(tb[NFTA_REJECT_TYPE]));
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
case NFT_REJECT_ICMPX_UNREACH:
if (tb[NFTA_REJECT_ICMP_CODE] == NULL)
return -EINVAL;
icmp_code = nla_get_u8(tb[NFTA_REJECT_ICMP_CODE]);
if (priv->type == NFT_REJECT_ICMPX_UNREACH &&
icmp_code > NFT_REJECT_ICMPX_MAX)
return -EINVAL;
priv->icmp_code = icmp_code;
break;
case NFT_REJECT_TCP_RST:
break;
default:
return -EINVAL;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Pablo Neira Ayuso | 137 | 85.09% | 1 | 25.00% |
Liping Zhang | 22 | 13.66% | 1 | 25.00% |
Patrick McHardy | 2 | 1.24% | 2 | 50.00% |
Total | 161 | 100.00% | 4 | 100.00% |
static int nft_reject_inet_dump(struct sk_buff *skb,
const struct nft_expr *expr)
{
const struct nft_reject *priv = nft_expr_priv(expr);
if (nla_put_be32(skb, NFTA_REJECT_TYPE, htonl(priv->type)))
goto nla_put_failure;
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
case NFT_REJECT_ICMPX_UNREACH:
if (nla_put_u8(skb, NFTA_REJECT_ICMP_CODE, priv->icmp_code))
goto nla_put_failure;
break;
default:
break;
}
return 0;
nla_put_failure:
return -1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Pablo Neira Ayuso | 86 | 96.63% | 1 | 33.33% |
David S. Miller | 2 | 2.25% | 1 | 33.33% |
Patrick McHardy | 1 | 1.12% | 1 | 33.33% |
Total | 89 | 100.00% | 3 | 100.00% |
static struct nft_expr_type nft_reject_inet_type;
static const struct nft_expr_ops nft_reject_inet_ops = {
.type = &nft_reject_inet_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_reject)),
.eval = nft_reject_inet_eval,
.init = nft_reject_inet_init,
.dump = nft_reject_inet_dump,
.validate = nft_reject_validate,
};
static struct nft_expr_type nft_reject_inet_type __read_mostly = {
.family = NFPROTO_INET,
.name = "reject",
.ops = &nft_reject_inet_ops,
.policy = nft_reject_policy,
.maxattr = NFTA_REJECT_MAX,
.owner = THIS_MODULE,
};
static int __init nft_reject_inet_module_init(void)
{
return nft_register_expr(&nft_reject_inet_type);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 16 | 100.00% | 1 | 100.00% |
Total | 16 | 100.00% | 1 | 100.00% |
static void __exit nft_reject_inet_module_exit(void)
{
nft_unregister_expr(&nft_reject_inet_type);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 15 | 100.00% | 1 | 100.00% |
Total | 15 | 100.00% | 1 | 100.00% |
module_init(nft_reject_inet_module_init);
module_exit(nft_reject_inet_module_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_ALIAS_NFT_AF_EXPR(1, "reject");
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Pablo Neira Ayuso | 386 | 60.22% | 2 | 20.00% |
Patrick McHardy | 216 | 33.70% | 3 | 30.00% |
Liping Zhang | 27 | 4.21% | 1 | 10.00% |
Eric W. Biedermann | 6 | 0.94% | 2 | 20.00% |
Florian Westphal | 4 | 0.62% | 1 | 10.00% |
David S. Miller | 2 | 0.31% | 1 | 10.00% |
Total | 641 | 100.00% | 10 | 100.00% |
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