/*
 * INET		An implementation of the TCP/IP protocol suite for the LINUX
 *		operating system.  INET is implemented using the  BSD Socket
 *		interface as the means of communication with the user level.
 *
 *		Definitions for the ICMP protocol.
 *
 * Version:	@(#)icmp.h	1.0.3	04/28/93
 *
 * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 */
#ifndef _LINUX_ICMP_H
#define	_LINUX_ICMP_H

#include <linux/types.h>

#define ICMP_ECHOREPLY		0	
#define ICMP_DEST_UNREACH	3	
#define ICMP_SOURCE_QUENCH	4	
#define ICMP_REDIRECT		5	
#define ICMP_ECHO		8	
#define ICMP_TIME_EXCEEDED	11	
#define ICMP_PARAMETERPROB	12	
#define ICMP_TIMESTAMP		13	
#define ICMP_TIMESTAMPREPLY	14	
#define ICMP_INFO_REQUEST	15	
#define ICMP_INFO_REPLY		16	
#define ICMP_ADDRESS		17	
#define ICMP_ADDRESSREPLY	18	
#define NR_ICMP_TYPES		18


#define ICMP_NET_UNREACH	0	
#define ICMP_HOST_UNREACH	1	
#define ICMP_PROT_UNREACH	2	
#define ICMP_PORT_UNREACH	3	
#define ICMP_FRAG_NEEDED	4	
#define ICMP_SR_FAILED		5	
#define ICMP_NET_UNKNOWN	6
#define ICMP_HOST_UNKNOWN	7
#define ICMP_HOST_ISOLATED	8
#define ICMP_NET_ANO		9
#define ICMP_HOST_ANO		10
#define ICMP_NET_UNR_TOS	11
#define ICMP_HOST_UNR_TOS	12
#define ICMP_PKT_FILTERED	13	
#define ICMP_PREC_VIOLATION	14	
#define ICMP_PREC_CUTOFF	15	
#define NR_ICMP_UNREACH		15	

#define ICMP_REDIR_NET		0	
#define ICMP_REDIR_HOST		1	
#define ICMP_REDIR_NETTOS	2	
#define ICMP_REDIR_HOSTTOS	3	

#define ICMP_EXC_TTL		0	
#define ICMP_EXC_FRAGTIME	1	


struct icmphdr {
  __u8		type;
  __u8		code;
  __sum16	checksum;
  union {
	struct {
		__be16	id;
		__be16	sequence;
	} echo;
	__be32	gateway;
	struct {
		__be16	__unused;
		__be16	mtu;
	} frag;
  } un;
};

#ifdef __KERNEL__
#include <linux/skbuff.h>

static inline struct icmphdr *icmp_hdr(const struct sk_buff *skb)
{
	return (struct icmphdr *)skb_transport_header(skb);
}
#endif


#define ICMP_FILTER			1

struct icmp_filter {
	__u32		data;
};


#endif