1/*
2 * INET		An implementation of the TCP/IP protocol suite for the LINUX
3 *		operating system.  INET is implemented using the  BSD Socket
4 *		interface as the means of communication with the user level.
5 *
6 *		Definitions for the ICMP module.
7 *
8 * Version:	@(#)icmp.h	1.0.4	05/13/93
9 *
10 * Authors:	Ross Biro
11 *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 *
13 *		This program is free software; you can redistribute it and/or
14 *		modify it under the terms of the GNU General Public License
15 *		as published by the Free Software Foundation; either version
16 *		2 of the License, or (at your option) any later version.
17 */
18#ifndef _ICMP_H
19#define	_ICMP_H
20
21#include <linux/icmp.h>
22
23#include <net/inet_sock.h>
24#include <net/snmp.h>
25
26struct icmp_err {
27  int		errno;
28  unsigned	fatal:1;
29};
30
31extern struct icmp_err icmp_err_convert[];
32DECLARE_SNMP_STAT(struct icmp_mib, icmp_statistics);
33#define ICMP_INC_STATS(field)		SNMP_INC_STATS(icmp_statistics, field)
34#define ICMP_INC_STATS_BH(field)	SNMP_INC_STATS_BH(icmp_statistics, field)
35#define ICMP_INC_STATS_USER(field) 	SNMP_INC_STATS_USER(icmp_statistics, field)
36
37struct dst_entry;
38struct net_proto_family;
39struct sk_buff;
40
41extern void	icmp_send(struct sk_buff *skb_in,  int type, int code, __be32 info);
42extern int	icmp_rcv(struct sk_buff *skb);
43extern int	icmp_ioctl(struct sock *sk, int cmd, unsigned long arg);
44extern void	icmp_init(struct net_proto_family *ops);
45
46/* Move into dst.h ? */
47extern int 	xrlim_allow(struct dst_entry *dst, int timeout);
48
49struct raw_sock {
50	/* inet_sock has to be the first member */
51	struct inet_sock   inet;
52	struct icmp_filter filter;
53};
54
55static inline struct raw_sock *raw_sk(const struct sock *sk)
56{
57	return (struct raw_sock *)sk;
58}
59
60extern int sysctl_icmp_echo_ignore_all;
61extern int sysctl_icmp_echo_ignore_broadcasts;
62extern int sysctl_icmp_ignore_bogus_error_responses;
63extern int sysctl_icmp_errors_use_inbound_ifaddr;
64extern int sysctl_icmp_ratelimit;
65extern int sysctl_icmp_ratemask;
66
67#endif	/* _ICMP_H */
68