/*
* Copyright (c) 2013 Antonin Steinhauser
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/** @addtogroup inet
* @{
*/
/**
* @file ICMPv6 standard definitions
*
*/
#ifndef ICMPV6_STD_H_
#define ICMPV6_STD_H_
#include <stdint.h>
#define IP_PROTO_ICMPV6 58
/** Type of service used for ICMP */
#define ICMPV6_TOS 0
#define INET6_HOP_LIMIT_MAX 255
#define NDP_FLAG_ROUTER 0x80
#define NDP_FLAG_OVERRIDE 0x40
#define NDP_FLAG_SOLICITED 0x20
/** ICMPv6 message type */
enum icmpv6_type {
ICMPV6_ECHO_REQUEST = 128,
ICMPV6_ECHO_REPLY = 129,
ICMPV6_ROUTER_SOLICITATION = 133,
ICMPV6_ROUTER_ADVERTISEMENT = 134,
ICMPV6_NEIGHBOUR_SOLICITATION = 135,
ICMPV6_NEIGHBOUR_ADVERTISEMENT = 136
};
/** NDP options */
enum ndp_option {
SOURCE_LINK_LAYER = 1,
TARGET_LINK_LAYER = 2,
PREFIX_INFORMATION = 3
};
/** ICMPv6 message header */
typedef struct {
/** ICMPv6 message type */
uint8_t type;
/** Code (0) */
uint8_t code;
/** Internet checksum of the ICMP message */
uint16_t checksum;
union {
struct {
/** Indentifier */
uint16_t ident;
/** Sequence number */
uint16_t seq_no;
} echo;
struct {
/** Flags byte */
uint8_t flags;
/** Reserved bytes */
uint8_t reserved[3];
} ndp;
} un;
} icmpv6_message_t;
/** ICMPv6 pseudoheader for checksum computation */
typedef struct {
/** Source IPv6 address */
uint8_t src_addr[16];
/** Target IPv6 address */
uint8_t dest_addr[16];
/** ICMPv6 length */
uint32_t length;
/** Zeroes */
uint8_t zeroes[3];
/** Next header */
uint8_t next;
} icmpv6_phdr_t;
/** NDP neighbour body */
typedef struct {
/** Target IPv6 address */
uint8_t target_address[16];
/** Option code */
uint8_t option;
/** Option length */
uint8_t length;
/** MAC address */
uint8_t mac[6];
} ndp_message_t;
/** NDP prefix information structure */
typedef struct {
/** Option code - must be 3 = PREFIX_INFORMATION */
uint8_t option;
/** Option length - may be 4 */
uint8_t length;
/** Prefix length */
uint8_t prefixlen;
/** Flags */
uint8_t flags;
/** Valid lifetime */
uint32_t valid_lftm;
/** Preferred lifetime */
uint32_t pref_lftm;
/** Reserved */
uint32_t reserved;
/** Prefix */
uint8_t prefix[16];
} ndp_prefix_t;
#endif
/** @}
*/