/*
 * Fundamental constants relating to ICMP Protocol
 *
 * Copyright (C) 2013, Broadcom Corporation. All Rights Reserved.
 * 
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * $Id: bcmicmp.h 384537 2013-02-12 04:27:03Z $
 */

#ifndef _bcmicmp_h_
#define _bcmicmp_h_

#ifndef _TYPEDEFS_H_
#include <typedefs.h>
#endif

/* This marks the start of a packed structure section. */
#include <packed_section_start.h>


#define ICMP_TYPE_ECHO_REQUEST	8	/* ICMP type echo request */
#define ICMP_TYPE_ECHO_REPLY		0	/* ICMP type echo reply */

#define ICMP_CHKSUM_OFFSET	2	/* ICMP body checksum offset */

/* ICMP6 error and control message types */
#define ICMP6_DEST_UNREACHABLE		1
#define ICMP6_PKT_TOO_BIG		2
#define ICMP6_TIME_EXCEEDED		3
#define ICMP6_PARAM_PROBLEM		4
#define ICMP6_ECHO_REQUEST		128
#define ICMP6_ECHO_REPLY		129
#define ICMP_MCAST_LISTENER_QUERY	130
#define ICMP_MCAST_LISTENER_REPORT	131
#define ICMP_MCAST_LISTENER_DONE	132
#define ICMP6_RTR_SOLICITATION		133
#define ICMP6_RTR_ADVERTISEMENT		134
#define ICMP6_NEIGH_SOLICITATION	135
#define ICMP6_NEIGH_ADVERTISEMENT	136
#define ICMP6_REDIRECT			137

#define ICMP6_RTRSOL_OPT_OFFSET		8
#define ICMP6_RTRADV_OPT_OFFSET		16
#define ICMP6_NEIGHSOL_OPT_OFFSET	24
#define ICMP6_NEIGHADV_OPT_OFFSET	24
#define ICMP6_REDIRECT_OPT_OFFSET	40

BWL_PRE_PACKED_STRUCT struct icmp6_opt {
	uint8	type;		/* Option identifier */
	uint8	length;		/* Lenth including type and length */
	uint8	data[0];	/* Variable length data */
} BWL_POST_PACKED_STRUCT;

#define	ICMP6_OPT_TYPE_SRC_LINK_LAYER	1
#define	ICMP6_OPT_TYPE_TGT_LINK_LAYER	2
#define	ICMP6_OPT_TYPE_PREFIX_INFO	3
#define	ICMP6_OPT_TYPE_REDIR_HDR	4
#define	ICMP6_OPT_TYPE_MTU		5

/* These fields are stored in network order */
BWL_PRE_PACKED_STRUCT struct bcmicmp_hdr {
	uint8	type;		/* Echo or Echo-reply */
	uint8	code;		/* Always 0 */
	uint16	chksum;		/* Icmp packet checksum */
} BWL_POST_PACKED_STRUCT;

/* This marks the end of a packed structure section. */
#include <packed_section_end.h>

#endif	/* #ifndef _bcmicmp_h_ */