ICMP structure definitions

1 files changed, 182 insertions, 0 deletions

diff --git a/includes/netinet/ip_icmp.h b/includes/netinet/ip_icmp.h
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+/*	$NetBSD: ip_icmp.h,v 1.11 1996/08/03 15:48:18 neil Exp $	*/
+
+/*
+ * Copyright (c) 1982, 1986, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)ip_icmp.h	8.1 (Berkeley) 6/10/93
+ */
+
+
+/*
+ * Interface Control Message Protocol Definitions.
+ * Per RFC 792, September 1981.
+ */
+
+/*
+ * Internal of an ICMP Router Advertisement
+ */
+struct icmp_ra_addr {
+	u_int32_t ira_addr;
+	u_int32_t ira_preference;
+};
+
+/*
+ * Structure of an icmp header.
+ */
+struct icmp {
+	u_int8_t  icmp_type;		/* type of message, see below */
+	u_int8_t  icmp_code;		/* type sub code */
+	u_int16_t icmp_cksum;		/* ones complement cksum of struct */
+	union {
+		u_int8_t  ih_pptr;		/* ICMP_PARAMPROB */
+		struct in_addr ih_gwaddr;	/* ICMP_REDIRECT */
+		struct ih_idseq {
+			  n_short icd_id;
+			  n_short icd_seq;
+		} ih_idseq;
+		int32_t   ih_void;
+
+		/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
+		struct ih_pmtu {
+			  n_short ipm_void;    
+			  n_short ipm_nextmtu;
+		} ih_pmtu;
+		struct ih_rtradv {
+			u_int8_t irt_num_addrs;
+			u_int8_t irt_wpa;
+			u_int16_t irt_lifetime;
+		} ih_rtradv;
+	} icmp_hun;
+#define	icmp_pptr	  icmp_hun.ih_pptr
+#define	icmp_gwaddr	  icmp_hun.ih_gwaddr
+#define	icmp_id		  icmp_hun.ih_idseq.icd_id
+#define	icmp_seq	  icmp_hun.ih_idseq.icd_seq
+#define	icmp_void	  icmp_hun.ih_void
+#define	icmp_pmvoid	  icmp_hun.ih_pmtu.ipm_void
+#define	icmp_nextmtu	  icmp_hun.ih_pmtu.ipm_nextmtu
+#define icmp_num_addrs    icmp_hun.ih_rtradv.irt_num_addrs
+#define icmp_wpa	  icmp_hun.ih_rtradv.irt_wpa
+#define icmp_lifetime	  icmp_hun.ih_rtradv.irt_lifetime
+	union {
+		struct id_ts {
+			  n_time its_otime;
+			  n_time its_rtime;
+			  n_time its_ttime;
+		} id_ts;
+		struct id_ip  {
+			  struct ip idi_ip;
+			  /* options and then 64 bits of data */
+		} id_ip;
+		struct icmp_ra_addr id_radv;
+		u_int32_t id_mask;
+		int8_t	  id_data[1];
+	} icmp_dun;
+#define	icmp_otime	  icmp_dun.id_ts.its_otime
+#define	icmp_rtime	  icmp_dun.id_ts.its_rtime
+#define	icmp_ttime	  icmp_dun.id_ts.its_ttime
+#define	icmp_ip		  icmp_dun.id_ip.idi_ip
+#define icmp_radv	  icmp_dun.id_mask
+#define	icmp_mask	  icmp_dun.id_mask
+#define	icmp_data	  icmp_dun.id_data
+};
+
+/*
+ * Lower bounds on packet lengths for various types.
+ * For the error advice packets must first insure that the
+ * packet is large enought to contain the returned ip header.
+ * Only then can we do the check to see if 64 bits of packet
+ * data have been returned, since we need to check the returned
+ * ip header length.
+ */
+#define	ICMP_MINLEN	8				/* abs minimum */
+#define	ICMP_TSLEN	(8 + 3 * sizeof (n_time))	/* timestamp */
+#define	ICMP_MASKLEN	12				/* address mask */
+#define	ICMP_ADVLENMIN	(8 + sizeof (struct ip) + 8)	/* min */
+#define	ICMP_ADVLEN(p)	(8 + ((p)->icmp_ip.ip_hl << 2) + 8)
+	/* N.B.: must separately check that ip_hl >= 5 */
+
+/*
+ * Definition of type and code field values.
+ */
+#define	ICMP_ECHOREPLY		0		/* echo reply */
+#define	ICMP_UNREACH		3		/* dest unreachable, codes: */
+#define		ICMP_UNREACH_NET	0		/* bad net */
+#define		ICMP_UNREACH_HOST	1		/* bad host */
+#define		ICMP_UNREACH_PROTOCOL	2		/* bad protocol */
+#define		ICMP_UNREACH_PORT	3		/* bad port */
+#define		ICMP_UNREACH_NEEDFRAG	4		/* IP_DF caused drop */
+#define		ICMP_UNREACH_SRCFAIL	5		/* src route failed */
+#define		ICMP_UNREACH_NET_UNKNOWN 6		/* unknown net */
+#define		ICMP_UNREACH_HOST_UNKNOWN 7		/* unknown host */
+#define		ICMP_UNREACH_ISOLATED	8		/* src host isolated */
+#define		ICMP_UNREACH_NET_PROHIB	9		/* prohibited access */
+#define		ICMP_UNREACH_HOST_PROHIB 10		/* ditto */
+#define		ICMP_UNREACH_TOSNET	11		/* bad tos for net */
+#define		ICMP_UNREACH_TOSHOST	12		/* bad tos for host */
+#define	ICMP_SOURCEQUENCH	4		/* packet lost, slow down */
+#define	ICMP_REDIRECT		5		/* shorter route, codes: */
+#define		ICMP_REDIRECT_NET	0		/* for network */
+#define		ICMP_REDIRECT_HOST	1		/* for host */
+#define		ICMP_REDIRECT_TOSNET	2		/* for tos and net */
+#define		ICMP_REDIRECT_TOSHOST	3		/* for tos and host */
+#define	ICMP_ECHO		8		/* echo service */
+#define	ICMP_ROUTERADVERT	9		/* router advertisement */
+#define	ICMP_ROUTERSOLICIT	10		/* router solicitation */
+#define	ICMP_TIMXCEED		11		/* time exceeded, code: */
+#define		ICMP_TIMXCEED_INTRANS	0		/* ttl==0 in transit */
+#define		ICMP_TIMXCEED_REASS	1		/* ttl==0 in reass */
+#define	ICMP_PARAMPROB		12		/* ip header bad */
+#define		ICMP_PARAMPROB_OPTABSENT 1		/* req. opt. absent */
+#define	ICMP_TSTAMP		13		/* timestamp request */
+#define	ICMP_TSTAMPREPLY	14		/* timestamp reply */
+#define	ICMP_IREQ		15		/* information request */
+#define	ICMP_IREQREPLY		16		/* information reply */
+#define	ICMP_MASKREQ		17		/* address mask request */
+#define	ICMP_MASKREPLY		18		/* address mask reply */
+
+#define	ICMP_MAXTYPE		18
+
+#define	ICMP_INFOTYPE(type) \
+	((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
+	(type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
+	(type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
+	(type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
+	(type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
+
+#ifdef _KERNEL
+void	icmp_error __P((struct mbuf *, int, int, n_long, struct ifnet *));
+void	icmp_input __P((struct mbuf *, ...));
+void	icmp_reflect __P((struct mbuf *));
+void	icmp_send __P((struct mbuf *, struct mbuf *));
+int	icmp_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
+#endif
+