d2912cb15b
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
122 lines
3 KiB
C
122 lines
3 KiB
C
// 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/nft_reject.h>
|
|
#include <linux/icmp.h>
|
|
#include <linux/icmpv6.h>
|
|
|
|
const struct nla_policy nft_reject_policy[NFTA_REJECT_MAX + 1] = {
|
|
[NFTA_REJECT_TYPE] = { .type = NLA_U32 },
|
|
[NFTA_REJECT_ICMP_CODE] = { .type = NLA_U8 },
|
|
};
|
|
EXPORT_SYMBOL_GPL(nft_reject_policy);
|
|
|
|
int nft_reject_validate(const struct nft_ctx *ctx,
|
|
const struct nft_expr *expr,
|
|
const struct nft_data **data)
|
|
{
|
|
return nft_chain_validate_hooks(ctx->chain,
|
|
(1 << NF_INET_LOCAL_IN) |
|
|
(1 << NF_INET_FORWARD) |
|
|
(1 << NF_INET_LOCAL_OUT));
|
|
}
|
|
EXPORT_SYMBOL_GPL(nft_reject_validate);
|
|
|
|
int nft_reject_init(const struct nft_ctx *ctx,
|
|
const struct nft_expr *expr,
|
|
const struct nlattr * const tb[])
|
|
{
|
|
struct nft_reject *priv = nft_expr_priv(expr);
|
|
|
|
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:
|
|
if (tb[NFTA_REJECT_ICMP_CODE] == NULL)
|
|
return -EINVAL;
|
|
priv->icmp_code = nla_get_u8(tb[NFTA_REJECT_ICMP_CODE]);
|
|
case NFT_REJECT_TCP_RST:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nft_reject_init);
|
|
|
|
int nft_reject_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:
|
|
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;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nft_reject_dump);
|
|
|
|
static u8 icmp_code_v4[NFT_REJECT_ICMPX_MAX + 1] = {
|
|
[NFT_REJECT_ICMPX_NO_ROUTE] = ICMP_NET_UNREACH,
|
|
[NFT_REJECT_ICMPX_PORT_UNREACH] = ICMP_PORT_UNREACH,
|
|
[NFT_REJECT_ICMPX_HOST_UNREACH] = ICMP_HOST_UNREACH,
|
|
[NFT_REJECT_ICMPX_ADMIN_PROHIBITED] = ICMP_PKT_FILTERED,
|
|
};
|
|
|
|
int nft_reject_icmp_code(u8 code)
|
|
{
|
|
if (WARN_ON_ONCE(code > NFT_REJECT_ICMPX_MAX))
|
|
return ICMP_NET_UNREACH;
|
|
|
|
return icmp_code_v4[code];
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(nft_reject_icmp_code);
|
|
|
|
|
|
static u8 icmp_code_v6[NFT_REJECT_ICMPX_MAX + 1] = {
|
|
[NFT_REJECT_ICMPX_NO_ROUTE] = ICMPV6_NOROUTE,
|
|
[NFT_REJECT_ICMPX_PORT_UNREACH] = ICMPV6_PORT_UNREACH,
|
|
[NFT_REJECT_ICMPX_HOST_UNREACH] = ICMPV6_ADDR_UNREACH,
|
|
[NFT_REJECT_ICMPX_ADMIN_PROHIBITED] = ICMPV6_ADM_PROHIBITED,
|
|
};
|
|
|
|
int nft_reject_icmpv6_code(u8 code)
|
|
{
|
|
if (WARN_ON_ONCE(code > NFT_REJECT_ICMPX_MAX))
|
|
return ICMPV6_NOROUTE;
|
|
|
|
return icmp_code_v6[code];
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(nft_reject_icmpv6_code);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
|