[457] | 1 | /**
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| 2 | * @file
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| 3 | * IPv6 protocol definitions
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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| 8 | * All rights reserved.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without modification,
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| 11 | * are permitted provided that the following conditions are met:
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| 12 | *
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| 13 | * 1. Redistributions of source code must retain the above copyright notice,
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| 14 | * this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 16 | * this list of conditions and the following disclaimer in the documentation
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| 17 | * and/or other materials provided with the distribution.
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| 18 | * 3. The name of the author may not be used to endorse or promote products
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| 19 | * derived from this software without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 24 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 26 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 30 | * OF SUCH DAMAGE.
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| 31 | *
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| 32 | * This file is part of the lwIP TCP/IP stack.
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| 33 | *
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| 34 | * Author: Adam Dunkels <adam@sics.se>
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| 35 | *
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| 36 | */
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| 37 | #ifndef LWIP_HDR_PROT_IP6_H
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| 38 | #define LWIP_HDR_PROT_IP6_H
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| 39 |
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| 40 | #include "lwip/arch.h"
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| 41 | #include "lwip/ip6_addr.h"
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| 42 |
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| 43 | #ifdef __cplusplus
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| 44 | extern "C" {
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| 45 | #endif
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| 46 |
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| 47 | /** This is the packed version of ip6_addr_t,
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| 48 | used in network headers that are itself packed */
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| 49 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 50 | # include "arch/bpstruct.h"
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| 51 | #endif
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| 52 | PACK_STRUCT_BEGIN
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| 53 | struct ip6_addr_packed {
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| 54 | PACK_STRUCT_FIELD(u32_t addr[4]);
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| 55 | } PACK_STRUCT_STRUCT;
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| 56 | PACK_STRUCT_END
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| 57 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 58 | # include "arch/epstruct.h"
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| 59 | #endif
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| 60 | typedef struct ip6_addr_packed ip6_addr_p_t;
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| 61 |
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| 62 | #define IP6_HLEN 40
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| 63 |
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| 64 | #define IP6_NEXTH_HOPBYHOP 0
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| 65 | #define IP6_NEXTH_TCP 6
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| 66 | #define IP6_NEXTH_UDP 17
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| 67 | #define IP6_NEXTH_ENCAPS 41
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| 68 | #define IP6_NEXTH_ROUTING 43
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| 69 | #define IP6_NEXTH_FRAGMENT 44
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| 70 | #define IP6_NEXTH_ICMP6 58
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| 71 | #define IP6_NEXTH_NONE 59
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| 72 | #define IP6_NEXTH_DESTOPTS 60
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| 73 | #define IP6_NEXTH_UDPLITE 136
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| 74 |
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| 75 | /** The IPv6 header. */
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| 76 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 77 | # include "arch/bpstruct.h"
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| 78 | #endif
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| 79 | PACK_STRUCT_BEGIN
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| 80 | struct ip6_hdr {
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| 81 | /** version / traffic class / flow label */
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| 82 | PACK_STRUCT_FIELD(u32_t _v_tc_fl);
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| 83 | /** payload length */
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| 84 | PACK_STRUCT_FIELD(u16_t _plen);
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| 85 | /** next header */
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| 86 | PACK_STRUCT_FLD_8(u8_t _nexth);
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| 87 | /** hop limit */
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| 88 | PACK_STRUCT_FLD_8(u8_t _hoplim);
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| 89 | /** source and destination IP addresses */
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| 90 | PACK_STRUCT_FLD_S(ip6_addr_p_t src);
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| 91 | PACK_STRUCT_FLD_S(ip6_addr_p_t dest);
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| 92 | } PACK_STRUCT_STRUCT;
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| 93 | PACK_STRUCT_END
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| 94 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 95 | # include "arch/epstruct.h"
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| 96 | #endif
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| 97 | #define IP6H_V(hdr) ((lwip_ntohl((hdr)->_v_tc_fl) >> 28) & 0x0f)
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| 98 | #define IP6H_TC(hdr) ((lwip_ntohl((hdr)->_v_tc_fl) >> 20) & 0xff)
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| 99 | #define IP6H_FL(hdr) (lwip_ntohl((hdr)->_v_tc_fl) & 0x000fffff)
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| 100 | #define IP6H_PLEN(hdr) (lwip_ntohs((hdr)->_plen))
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| 101 | #define IP6H_NEXTH(hdr) ((hdr)->_nexth)
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| 102 | #define IP6H_NEXTH_P(hdr) ((u8_t *)(hdr) + 6)
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| 103 | #define IP6H_HOPLIM(hdr) ((hdr)->_hoplim)
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| 104 | #define IP6H_VTCFL_SET(hdr, v, tc, fl) (hdr)->_v_tc_fl = (lwip_htonl((((u32_t)(v)) << 28) | (((u32_t)(tc)) << 20) | (fl)))
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| 105 | #define IP6H_PLEN_SET(hdr, plen) (hdr)->_plen = lwip_htons(plen)
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| 106 | #define IP6H_NEXTH_SET(hdr, nexth) (hdr)->_nexth = (nexth)
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| 107 | #define IP6H_HOPLIM_SET(hdr, hl) (hdr)->_hoplim = (u8_t)(hl)
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| 108 |
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| 109 | /* ipv6 extended options header */
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| 110 | #define IP6_PAD1_OPTION 0
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| 111 | #define IP6_PADN_OPTION 1
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| 112 | #define IP6_ROUTER_ALERT_OPTION 5
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| 113 | #define IP6_JUMBO_OPTION 194
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| 114 | #define IP6_HOME_ADDRESS_OPTION 201
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| 115 | #define IP6_ROUTER_ALERT_DLEN 2
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| 116 | #define IP6_ROUTER_ALERT_VALUE_MLD 0
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| 117 |
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| 118 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 119 | # include "arch/bpstruct.h"
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| 120 | #endif
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| 121 | PACK_STRUCT_BEGIN
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| 122 | struct ip6_opt_hdr {
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| 123 | /* router alert option type */
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| 124 | PACK_STRUCT_FLD_8(u8_t _opt_type);
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| 125 | /* router alert option data len */
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| 126 | PACK_STRUCT_FLD_8(u8_t _opt_dlen);
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| 127 | } PACK_STRUCT_STRUCT;
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| 128 | PACK_STRUCT_END
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| 129 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 130 | # include "arch/epstruct.h"
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| 131 | #endif
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| 132 | #define IP6_OPT_HLEN 2
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| 133 | #define IP6_OPT_TYPE_ACTION(hdr) ((((hdr)->_opt_type) >> 6) & 0x3)
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| 134 | #define IP6_OPT_TYPE_CHANGE(hdr) ((((hdr)->_opt_type) >> 5) & 0x1)
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| 135 | #define IP6_OPT_TYPE(hdr) ((hdr)->_opt_type)
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| 136 | #define IP6_OPT_DLEN(hdr) ((hdr)->_opt_dlen)
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| 137 |
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| 138 | /* Hop-by-Hop header. */
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| 139 | #define IP6_HBH_HLEN 2
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| 140 |
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| 141 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 142 | # include "arch/bpstruct.h"
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| 143 | #endif
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| 144 | PACK_STRUCT_BEGIN
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| 145 | struct ip6_hbh_hdr {
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| 146 | /* next header */
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| 147 | PACK_STRUCT_FLD_8(u8_t _nexth);
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| 148 | /* header length in 8-octet units */
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| 149 | PACK_STRUCT_FLD_8(u8_t _hlen);
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| 150 | } PACK_STRUCT_STRUCT;
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| 151 | PACK_STRUCT_END
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| 152 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 153 | # include "arch/epstruct.h"
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| 154 | #endif
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| 155 | #define IP6_HBH_NEXTH(hdr) ((hdr)->_nexth)
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| 156 |
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| 157 | /* Destination header. */
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| 158 | #define IP6_DEST_HLEN 2
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| 159 |
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| 160 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 161 | # include "arch/bpstruct.h"
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| 162 | #endif
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| 163 | PACK_STRUCT_BEGIN
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| 164 | struct ip6_dest_hdr {
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| 165 | /* next header */
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| 166 | PACK_STRUCT_FLD_8(u8_t _nexth);
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| 167 | /* header length in 8-octet units */
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| 168 | PACK_STRUCT_FLD_8(u8_t _hlen);
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| 169 | } PACK_STRUCT_STRUCT;
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| 170 | PACK_STRUCT_END
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| 171 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 172 | # include "arch/epstruct.h"
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| 173 | #endif
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| 174 | #define IP6_DEST_NEXTH(hdr) ((hdr)->_nexth)
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| 175 |
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| 176 | /* Routing header */
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| 177 | #define IP6_ROUT_TYPE2 2
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| 178 | #define IP6_ROUT_RPL 3
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| 179 |
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| 180 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 181 | # include "arch/bpstruct.h"
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| 182 | #endif
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| 183 | PACK_STRUCT_BEGIN
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| 184 | struct ip6_rout_hdr {
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| 185 | /* next header */
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| 186 | PACK_STRUCT_FLD_8(u8_t _nexth);
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| 187 | /* reserved */
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| 188 | PACK_STRUCT_FLD_8(u8_t _hlen);
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| 189 | /* fragment offset */
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| 190 | PACK_STRUCT_FIELD(u8_t _routing_type);
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| 191 | /* fragmented packet identification */
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| 192 | PACK_STRUCT_FIELD(u8_t _segments_left);
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| 193 | } PACK_STRUCT_STRUCT;
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| 194 | PACK_STRUCT_END
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| 195 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 196 | # include "arch/epstruct.h"
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| 197 | #endif
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| 198 | #define IP6_ROUT_NEXTH(hdr) ((hdr)->_nexth)
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| 199 | #define IP6_ROUT_TYPE(hdr) ((hdr)->_routing_type)
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| 200 | #define IP6_ROUT_SEG_LEFT(hdr) ((hdr)->_segments_left)
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| 201 |
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| 202 | /* Fragment header. */
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| 203 | #define IP6_FRAG_HLEN 8
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| 204 | #define IP6_FRAG_OFFSET_MASK 0xfff8
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| 205 | #define IP6_FRAG_MORE_FLAG 0x0001
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| 206 |
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| 207 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 208 | # include "arch/bpstruct.h"
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| 209 | #endif
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| 210 | PACK_STRUCT_BEGIN
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| 211 | struct ip6_frag_hdr {
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| 212 | /* next header */
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| 213 | PACK_STRUCT_FLD_8(u8_t _nexth);
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| 214 | /* reserved */
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| 215 | PACK_STRUCT_FLD_8(u8_t reserved);
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| 216 | /* fragment offset */
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| 217 | PACK_STRUCT_FIELD(u16_t _fragment_offset);
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| 218 | /* fragmented packet identification */
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| 219 | PACK_STRUCT_FIELD(u32_t _identification);
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| 220 | } PACK_STRUCT_STRUCT;
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| 221 | PACK_STRUCT_END
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| 222 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 223 | # include "arch/epstruct.h"
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| 224 | #endif
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| 225 | #define IP6_FRAG_NEXTH(hdr) ((hdr)->_nexth)
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| 226 | #define IP6_FRAG_MBIT(hdr) (lwip_ntohs((hdr)->_fragment_offset) & 0x1)
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| 227 | #define IP6_FRAG_ID(hdr) (lwip_ntohl((hdr)->_identification))
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| 228 |
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| 229 | #ifdef __cplusplus
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| 230 | }
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| 231 | #endif
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| 232 |
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| 233 | #endif /* LWIP_HDR_PROT_IP6_H */
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