Release 4.7 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 (pkt->pf) {
case NFPROTO_IPV4:
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
nf_send_unreach(pkt->skb, priv->icmp_code,
pkt->hook);
break;
case NFT_REJECT_TCP_RST:
nf_send_reset(pkt->net, pkt->skb, pkt->hook);
break;
case NFT_REJECT_ICMPX_UNREACH:
nf_send_unreach(pkt->skb,
nft_reject_icmp_code(priv->icmp_code),
pkt->hook);
break;
}
break;
case NFPROTO_IPV6:
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
nf_send_unreach6(pkt->net, pkt->skb, priv->icmp_code,
pkt->hook);
break;
case NFT_REJECT_TCP_RST:
nf_send_reset6(pkt->net, pkt->skb, pkt->hook);
break;
case NFT_REJECT_ICMPX_UNREACH:
nf_send_unreach6(pkt->net, pkt->skb,
nft_reject_icmpv6_code(priv->icmp_code),
pkt->hook);
break;
}
break;
}
regs->verdict.code = NF_DROP;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pablo neira ayuso | pablo neira ayuso | 130 | 64.68% | 1 | 14.29% |
patrick mchardy | patrick mchardy | 49 | 24.38% | 2 | 28.57% |
eric w. biederman | eric w. biederman | 16 | 7.96% | 3 | 42.86% |
florian westphal | florian westphal | 6 | 2.99% | 1 | 14.29% |
| Total | 201 | 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;
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 | pablo neira ayuso | 137 | 98.56% | 1 | 33.33% |
patrick mchardy | patrick mchardy | 2 | 1.44% | 2 | 66.67% |
| Total | 139 | 100.00% | 3 | 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 | pablo neira ayuso | 86 | 96.63% | 1 | 33.33% |
david s. miller | david s. miller | 2 | 2.25% | 1 | 33.33% |
patrick mchardy | 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,
};
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 | 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 | 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 | pablo neira ayuso | 361 | 59.87% | 1 | 11.11% |
patrick mchardy | patrick mchardy | 218 | 36.15% | 3 | 33.33% |
eric w. biederman | eric w. biederman | 16 | 2.65% | 3 | 33.33% |
florian westphal | florian westphal | 6 | 1.00% | 1 | 11.11% |
david s. miller | david s. miller | 2 | 0.33% | 1 | 11.11% |
| Total | 603 | 100.00% | 9 | 100.00% |
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