| 1 | /*
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| 2 | * Copyright (c) 2013 Antonin Steinhauser
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup inet
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file ICMPv6 standard definitions
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| 34 | *
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| 35 | */
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| 36 |
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| 37 | #ifndef ICMPV6_STD_H_
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| 38 | #define ICMPV6_STD_H_
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| 39 |
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| 40 | #include <stdint.h>
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| 41 |
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| 42 | #define IP_PROTO_ICMPV6 58
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| 43 |
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| 44 | /** Type of service used for ICMP */
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| 45 | #define ICMPV6_TOS 0
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| 46 |
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| 47 | #define INET6_HOP_LIMIT_MAX 255
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| 48 |
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| 49 | #define NDP_FLAG_ROUTER 0x80
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| 50 | #define NDP_FLAG_OVERRIDE 0x40
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| 51 | #define NDP_FLAG_SOLICITED 0x20
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| 52 |
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| 53 | /** ICMPv6 message type */
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| 54 | enum icmpv6_type {
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| 55 | ICMPV6_ECHO_REQUEST = 128,
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| 56 | ICMPV6_ECHO_REPLY = 129,
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| 57 | ICMPV6_ROUTER_SOLICITATION = 133,
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| 58 | ICMPV6_ROUTER_ADVERTISEMENT = 134,
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| 59 | ICMPV6_NEIGHBOUR_SOLICITATION = 135,
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| 60 | ICMPV6_NEIGHBOUR_ADVERTISEMENT = 136
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| 61 | };
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| 62 |
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| 63 | /** NDP options */
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| 64 | enum ndp_option {
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| 65 | SOURCE_LINK_LAYER = 1,
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| 66 | TARGET_LINK_LAYER = 2,
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| 67 | PREFIX_INFORMATION = 3
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| 68 | };
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| 69 |
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| 70 | /** ICMPv6 message header */
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| 71 | typedef struct {
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| 72 | /** ICMPv6 message type */
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| 73 | uint8_t type;
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| 74 | /** Code (0) */
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| 75 | uint8_t code;
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| 76 | /** Internet checksum of the ICMP message */
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| 77 | uint16_t checksum;
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| 78 | union {
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| 79 | struct {
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| 80 | /** Indentifier */
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| 81 | uint16_t ident;
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| 82 | /** Sequence number */
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| 83 | uint16_t seq_no;
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| 84 | } echo;
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| 85 | struct {
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| 86 | /** Flags byte */
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| 87 | uint8_t flags;
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| 88 | /** Reserved bytes */
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| 89 | uint8_t reserved[3];
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| 90 | } ndp;
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| 91 | } un;
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| 92 | } icmpv6_message_t;
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| 93 |
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| 94 | /** ICMPv6 pseudoheader for checksum computation */
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| 95 | typedef struct {
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| 96 | /** Source IPv6 address */
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| 97 | uint8_t src_addr[16];
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| 98 | /** Target IPv6 address */
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| 99 | uint8_t dest_addr[16];
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| 100 | /** ICMPv6 length */
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| 101 | uint32_t length;
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| 102 | /** Zeroes */
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| 103 | uint8_t zeroes[3];
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| 104 | /** Next header */
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| 105 | uint8_t next;
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| 106 | } icmpv6_phdr_t;
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| 107 |
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| 108 | /** NDP neighbour body */
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| 109 | typedef struct {
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| 110 | /** Target IPv6 address */
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| 111 | uint8_t target_address[16];
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| 112 | /** Option code */
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| 113 | uint8_t option;
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| 114 | /** Option length */
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| 115 | uint8_t length;
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| 116 | /** MAC address */
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| 117 | uint8_t mac[6];
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| 118 | } ndp_message_t;
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| 119 |
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| 120 | /** NDP prefix information structure */
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| 121 | typedef struct {
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| 122 | /** Option code - must be 3 = PREFIX_INFORMATION */
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| 123 | uint8_t option;
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| 124 | /** Option length - may be 4 */
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| 125 | uint8_t length;
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| 126 | /** Prefix length */
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| 127 | uint8_t prefixlen;
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| 128 | /** Flags */
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| 129 | uint8_t flags;
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| 130 | /** Valid lifetime */
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| 131 | uint32_t valid_lftm;
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| 132 | /** Preferred lifetime */
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| 133 | uint32_t pref_lftm;
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| 134 | /** Reserved */
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| 135 | uint32_t reserved;
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| 136 | /** Prefix */
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| 137 | uint8_t prefix[16];
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| 138 | } ndp_prefix_t;
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| 139 |
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| 140 | #endif
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| 141 |
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| 142 | /** @}
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| 143 | */
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