sl@0: /* IP_ICMP.H
sl@0:  * 
sl@0:  * Portions Copyright (c) 1997-1999 Nokia Corporation and/or its subsidiary(-ies).
sl@0:  * All rights reserved.
sl@0:  */
sl@0:  
sl@0: /** @file
sl@0: @publishedAll
sl@0: @released
sl@0: */
sl@0: 
sl@0: /*
sl@0:  * Copyright (c) 1982, 1986 Regents of the University of California.
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms are permitted
sl@0:  * provided that this notice is preserved and that due credit is given
sl@0:  * to the University of California at Berkeley. The name of the University
sl@0:  * may not be used to endorse or promote products derived from this
sl@0:  * software without specific prior written permission. This software
sl@0:  * is provided ``as is'' without express or implied warranty.
sl@0:  */
sl@0: 
sl@0: /*
sl@0:  * Interface Control Message Protocol Definitions.
sl@0:  * Per RFC 792, September 1981.
sl@0:  */
sl@0: 
sl@0: #ifndef	_NETINET_IP_ICMP_H
sl@0: #define	_NETINET_IP_ICMP_H
sl@0: 
sl@0: #ifdef	__cplusplus
sl@0: extern "C" {
sl@0: #endif
sl@0: 
sl@0: /**
sl@0: Structure of an icmp header.
sl@0: */
sl@0: struct icmp {
sl@0: 	u_char	icmp_type;		/* type of message, see below */
sl@0: 	u_char	icmp_code;		/* type sub code */
sl@0: 	u_short	icmp_cksum;		/* ones complement cksum of struct */
sl@0: 	union {
sl@0: 		u_char ih_pptr;			/* ICMP_PARAMPROB */
sl@0: 		struct in_addr ih_gwaddr;	/* ICMP_REDIRECT */
sl@0: 		struct ih_idseq {
sl@0: 			n_short	icd_id;
sl@0: 			n_short	icd_seq;
sl@0: 		} ih_idseq;
sl@0: 		int ih_void;
sl@0: 	} icmp_hun;
sl@0: #define	icmp_pptr	icmp_hun.ih_pptr
sl@0: #define	icmp_gwaddr	icmp_hun.ih_gwaddr
sl@0: #define	icmp_id		icmp_hun.ih_idseq.icd_id
sl@0: #define	icmp_seq	icmp_hun.ih_idseq.icd_seq
sl@0: #define	icmp_void	icmp_hun.ih_void
sl@0: 	union {
sl@0: 		struct id_ts {
sl@0: 			n_time its_otime;
sl@0: 			n_time its_rtime;
sl@0: 			n_time its_ttime;
sl@0: 		} id_ts;
sl@0: 		struct id_ip  {
sl@0: 			struct ip idi_ip;
sl@0: 			/* options and then 64 bits of data */
sl@0: 		} id_ip;
sl@0: 		u_long	id_mask;
sl@0: 		char	id_data[1];
sl@0: 	} icmp_dun;
sl@0: #define	icmp_otime	icmp_dun.id_ts.its_otime
sl@0: #define	icmp_rtime	icmp_dun.id_ts.its_rtime
sl@0: #define	icmp_ttime	icmp_dun.id_ts.its_ttime
sl@0: #define	icmp_ip		icmp_dun.id_ip.idi_ip
sl@0: #define	icmp_mask	icmp_dun.id_mask
sl@0: #define	icmp_data	icmp_dun.id_data
sl@0: };
sl@0: 
sl@0: /**
sl@0: Lower bounds on packet lengths for various types.
sl@0: For the error advice packets must first insure that the
sl@0: packet is large enought to contain the returned ip header.
sl@0: Only then can we do the check to see if 64 bits of packet
sl@0: data have been returned, since we need to check the returned
sl@0: ip header length.
sl@0: */
sl@0: #define	ICMP_MINLEN	8				/* abs minimum */
sl@0: #define	ICMP_TSLEN	(8 + 3 * sizeof (n_time))	/* timestamp */
sl@0: #define	ICMP_MASKLEN	12				/* address mask */
sl@0: #define	ICMP_ADVLENMIN	(8 + sizeof (struct ip) + 8)	/* min */
sl@0: #define	ICMP_ADVLEN(p)	(8 + ((p)->icmp_ip.ip_hl << 2) + 8)
sl@0: 	/* N.B.: must separately check that ip_hl >= 5 */
sl@0: 
sl@0: /**
sl@0: Definition of type and code field values.
sl@0: */
sl@0: #define	ICMP_ECHOREPLY		0		/* echo reply */
sl@0: #define	ICMP_UNREACH		3		/* dest unreachable, codes: */
sl@0: #define		ICMP_UNREACH_NET	0		/* bad net */
sl@0: #define		ICMP_UNREACH_HOST	1		/* bad host */
sl@0: #define		ICMP_UNREACH_PROTOCOL	2		/* bad protocol */
sl@0: #define		ICMP_UNREACH_PORT	3		/* bad port */
sl@0: #define		ICMP_UNREACH_NEEDFRAG	4		/* IP_DF caused drop */
sl@0: #define		ICMP_UNREACH_SRCFAIL	5		/* src route failed */
sl@0: #define	ICMP_SOURCEQUENCH	4		/* packet lost, slow down */
sl@0: #define	ICMP_REDIRECT		5		/* shorter route, codes: */
sl@0: #define		ICMP_REDIRECT_NET	0		/* for network */
sl@0: #define		ICMP_REDIRECT_HOST	1		/* for host */
sl@0: #define		ICMP_REDIRECT_TOSNET	2		/* for tos and net */
sl@0: #define		ICMP_REDIRECT_TOSHOST	3		/* for tos and host */
sl@0: #define	ICMP_ECHO		8		/* echo service */
sl@0: #define	ICMP_TIMXCEED		11		/* time exceeded, code: */
sl@0: #define		ICMP_TIMXCEED_INTRANS	0		/* ttl==0 in transit */
sl@0: #define		ICMP_TIMXCEED_REASS	1		/* ttl==0 in reass */
sl@0: #define	ICMP_PARAMPROB		12		/* ip header bad */
sl@0: #define	ICMP_TSTAMP		13		/* timestamp request */
sl@0: #define	ICMP_TSTAMPREPLY	14		/* timestamp reply */
sl@0: #define	ICMP_IREQ		15		/* information request */
sl@0: #define	ICMP_IREQREPLY		16		/* information reply */
sl@0: #define	ICMP_MASKREQ		17		/* address mask request */
sl@0: #define	ICMP_MASKREPLY		18		/* address mask reply */
sl@0: #define	ICMP_MAXTYPE		18
sl@0: 
sl@0: #define	ICMP_INFOTYPE(type) \
sl@0: 	((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
sl@0: 	(type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
sl@0: 	(type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
sl@0: 	(type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
sl@0: 
sl@0: #ifdef	__cplusplus
sl@0: }
sl@0: #endif
sl@0: 
sl@0: #endif	/* _NETINET_IP_ICMP_H */