/* * 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#define ICMP_ECHOREPLY		0	/* Echo Reply			*/#define ICMP_DEST_UNREACH	3	/* Destination Unreachable	*/#define ICMP_SOURCE_QUENCH	4	/* Source Quench		*/#define ICMP_REDIRECT		5	/* Redirect (change route)	*/#define ICMP_ECHO		8	/* Echo Request			*/#define ICMP_TIME_EXCEEDED	11	/* Time Exceeded		*/#define ICMP_PARAMETERPROB	12	/* Parameter Problem		*/#define ICMP_TIMESTAMP		13	/* Timestamp Request		*/#define ICMP_TIMESTAMPREPLY	14	/* Timestamp Reply		*/#define ICMP_INFO_REQUEST	15	/* Information Request		*/#define ICMP_INFO_REPLY		16	/* Information Reply		*/#define ICMP_ADDRESS		17	/* Address Mask Request		*/#define ICMP_ADDRESSREPLY	18	/* Address Mask Reply		*//* Codes for UNREACH. */#define ICMP_NET_UNREACH	0	/* Network Unreachable		*/#define ICMP_HOST_UNREACH	1	/* Host Unreachable		*/#define ICMP_PROT_UNREACH	2	/* Protocol Unreachable		*/#define ICMP_PORT_UNREACH	3	/* Port Unreachable		*/#define ICMP_FRAG_NEEDED	4	/* Fragmentation Needed/DF set	*/#define ICMP_SR_FAILED		5	/* Source Route failed		*/#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/* Codes for REDIRECT. */#define ICMP_REDIR_NET		0	/* Redirect Net			*/#define ICMP_REDIR_HOST		1	/* Redirect Host		*/#define ICMP_REDIR_NETTOS	2	/* Redirect Net for TOS		*/#define ICMP_REDIR_HOSTTOS	3	/* Redirect Host for TOS	*//* Codes for TIME_EXCEEDED. */#define ICMP_EXC_TTL		0	/* TTL count exceeded		*/#define ICMP_EXC_FRAGTIME	1	/* Fragment Reass time exceeded	*/struct icmphdr {  unsigned char		type;  unsigned char		code;  unsigned short	checksum;  union {	struct {		unsigned short	id;		unsigned short	sequence;	} echo;	unsigned long gateway;  } un;};struct icmp_err {  int		errno;  unsigned	fatal:1;};#endif	/* _LINUX_ICMP_H */