linux/net/ipv4/netfilter/nf_reject_ipv4.c

// SPDX-License-Identifier: GPL-2.0-only
/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2004 Netfilter Core Team <[email protected]>
 */

#include <linux/module.h>
#include <net/ip.h>
#include <net/tcp.h>
#include <net/route.h>
#include <net/dst.h>
#include <net/netfilter/ipv4/nf_reject.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_bridge.h>

static int nf_reject_iphdr_validate(struct sk_buff *skb)
{ … }

struct sk_buff *nf_reject_skb_v4_tcp_reset(struct net *net,
					   struct sk_buff *oldskb,
					   const struct net_device *dev,
					   int hook)
{ … }
EXPORT_SYMBOL_GPL(…);

struct sk_buff *nf_reject_skb_v4_unreach(struct net *net,
					 struct sk_buff *oldskb,
					 const struct net_device *dev,
					 int hook, u8 code)
{ … }
EXPORT_SYMBOL_GPL(…);

const struct tcphdr *nf_reject_ip_tcphdr_get(struct sk_buff *oldskb,
					     struct tcphdr *_oth, int hook)
{ … }
EXPORT_SYMBOL_GPL(…);

struct iphdr *nf_reject_iphdr_put(struct sk_buff *nskb,
				  const struct sk_buff *oldskb,
				  __u8 protocol, int ttl)
{ … }
EXPORT_SYMBOL_GPL(…);

void nf_reject_ip_tcphdr_put(struct sk_buff *nskb, const struct sk_buff *oldskb,
			  const struct tcphdr *oth)
{ … }
EXPORT_SYMBOL_GPL(…);

static int nf_reject_fill_skb_dst(struct sk_buff *skb_in)
{ … }

/* Send RST reply */
void nf_send_reset(struct net *net, struct sock *sk, struct sk_buff *oldskb,
		   int hook)
{ … }
EXPORT_SYMBOL_GPL(…);

void nf_send_unreach(struct sk_buff *skb_in, int code, int hook)
{ … }
EXPORT_SYMBOL_GPL(…);

MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;