1 /** 2 * @file 3 * IPv6 protocol definitions 4 */ 5 6 /* 7 * Copyright (c) 2001-2004 Swedish Institute of Computer Science. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without modification, 11 * are permitted provided that the following conditions are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright notice, 14 * this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 24 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 30 * OF SUCH DAMAGE. 31 * 32 * This file is part of the lwIP TCP/IP stack. 33 * 34 * Author: Adam Dunkels <[email protected]> 35 * 36 */ 37 #ifndef LWIP_HDR_PROT_IP6_H 38 #define LWIP_HDR_PROT_IP6_H 39 40 #include "lwip/arch.h" 41 #include "lwip/ip6_addr.h" 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 /** This is the packed version of ip6_addr_t, 48 used in network headers that are itself packed */ 49 #ifdef PACK_STRUCT_USE_INCLUDES 50 # include "arch/bpstruct.h" 51 #endif 52 PACK_STRUCT_BEGIN 53 struct ip6_addr_packed { 54 PACK_STRUCT_FIELD(u32_t addr[4]); 55 } PACK_STRUCT_STRUCT; 56 PACK_STRUCT_END 57 #ifdef PACK_STRUCT_USE_INCLUDES 58 # include "arch/epstruct.h" 59 #endif 60 typedef struct ip6_addr_packed ip6_addr_p_t; 61 62 #define IP6_HLEN 40 63 64 #define IP6_NEXTH_HOPBYHOP 0 65 #define IP6_NEXTH_TCP 6 66 #define IP6_NEXTH_UDP 17 67 #define IP6_NEXTH_ENCAPS 41 68 #define IP6_NEXTH_ROUTING 43 69 #define IP6_NEXTH_FRAGMENT 44 70 #define IP6_NEXTH_ICMP6 58 71 #define IP6_NEXTH_NONE 59 72 #define IP6_NEXTH_DESTOPTS 60 73 #define IP6_NEXTH_UDPLITE 136 74 75 /** The IPv6 header. */ 76 #ifdef PACK_STRUCT_USE_INCLUDES 77 # include "arch/bpstruct.h" 78 #endif 79 PACK_STRUCT_BEGIN 80 struct ip6_hdr { 81 /** version / traffic class / flow label */ 82 PACK_STRUCT_FIELD(u32_t _v_tc_fl); 83 /** payload length */ 84 PACK_STRUCT_FIELD(u16_t _plen); 85 /** next header */ 86 PACK_STRUCT_FLD_8(u8_t _nexth); 87 /** hop limit */ 88 PACK_STRUCT_FLD_8(u8_t _hoplim); 89 /** source and destination IP addresses */ 90 PACK_STRUCT_FLD_S(ip6_addr_p_t src); 91 PACK_STRUCT_FLD_S(ip6_addr_p_t dest); 92 } PACK_STRUCT_STRUCT; 93 PACK_STRUCT_END 94 #ifdef PACK_STRUCT_USE_INCLUDES 95 # include "arch/epstruct.h" 96 #endif 97 #define IP6H_V(hdr) ((lwip_ntohl((hdr)->_v_tc_fl) >> 28) & 0x0f) 98 #define IP6H_TC(hdr) ((lwip_ntohl((hdr)->_v_tc_fl) >> 20) & 0xff) 99 #define IP6H_FL(hdr) (lwip_ntohl((hdr)->_v_tc_fl) & 0x000fffff) 100 #define IP6H_PLEN(hdr) (lwip_ntohs((hdr)->_plen)) 101 #define IP6H_NEXTH(hdr) ((hdr)->_nexth) 102 #define IP6H_NEXTH_P(hdr) ((u8_t *)(hdr) + 6) 103 #define IP6H_HOPLIM(hdr) ((hdr)->_hoplim) 104 #define IP6H_VTCFL_SET(hdr, v, tc, fl) (hdr)->_v_tc_fl = (lwip_htonl((((u32_t)(v)) << 28) | (((u32_t)(tc)) << 20) | (fl))) 105 #define IP6H_PLEN_SET(hdr, plen) (hdr)->_plen = lwip_htons(plen) 106 #define IP6H_NEXTH_SET(hdr, nexth) (hdr)->_nexth = (nexth) 107 #define IP6H_HOPLIM_SET(hdr, hl) (hdr)->_hoplim = (u8_t)(hl) 108 109 /* ipv6 extended options header */ 110 #define IP6_PAD1_OPTION 0 111 #define IP6_PADN_OPTION 1 112 #define IP6_ROUTER_ALERT_OPTION 5 113 #define IP6_JUMBO_OPTION 194 114 #define IP6_HOME_ADDRESS_OPTION 201 115 #define IP6_ROUTER_ALERT_DLEN 2 116 #define IP6_ROUTER_ALERT_VALUE_MLD 0 117 118 #ifdef PACK_STRUCT_USE_INCLUDES 119 # include "arch/bpstruct.h" 120 #endif 121 PACK_STRUCT_BEGIN 122 struct ip6_opt_hdr { 123 /* router alert option type */ 124 PACK_STRUCT_FLD_8(u8_t _opt_type); 125 /* router alert option data len */ 126 PACK_STRUCT_FLD_8(u8_t _opt_dlen); 127 } PACK_STRUCT_STRUCT; 128 PACK_STRUCT_END 129 #ifdef PACK_STRUCT_USE_INCLUDES 130 # include "arch/epstruct.h" 131 #endif 132 #define IP6_OPT_HLEN 2 133 #define IP6_OPT_TYPE_ACTION(hdr) ((((hdr)->_opt_type) >> 6) & 0x3) 134 #define IP6_OPT_TYPE_CHANGE(hdr) ((((hdr)->_opt_type) >> 5) & 0x1) 135 #define IP6_OPT_TYPE(hdr) ((hdr)->_opt_type) 136 #define IP6_OPT_DLEN(hdr) ((hdr)->_opt_dlen) 137 138 /* Hop-by-Hop header. */ 139 #define IP6_HBH_HLEN 2 140 141 #ifdef PACK_STRUCT_USE_INCLUDES 142 # include "arch/bpstruct.h" 143 #endif 144 PACK_STRUCT_BEGIN 145 struct ip6_hbh_hdr { 146 /* next header */ 147 PACK_STRUCT_FLD_8(u8_t _nexth); 148 /* header length in 8-octet units */ 149 PACK_STRUCT_FLD_8(u8_t _hlen); 150 } PACK_STRUCT_STRUCT; 151 PACK_STRUCT_END 152 #ifdef PACK_STRUCT_USE_INCLUDES 153 # include "arch/epstruct.h" 154 #endif 155 #define IP6_HBH_NEXTH(hdr) ((hdr)->_nexth) 156 157 /* Destination header. */ 158 #define IP6_DEST_HLEN 2 159 160 #ifdef PACK_STRUCT_USE_INCLUDES 161 # include "arch/bpstruct.h" 162 #endif 163 PACK_STRUCT_BEGIN 164 struct ip6_dest_hdr { 165 /* next header */ 166 PACK_STRUCT_FLD_8(u8_t _nexth); 167 /* header length in 8-octet units */ 168 PACK_STRUCT_FLD_8(u8_t _hlen); 169 } PACK_STRUCT_STRUCT; 170 PACK_STRUCT_END 171 #ifdef PACK_STRUCT_USE_INCLUDES 172 # include "arch/epstruct.h" 173 #endif 174 #define IP6_DEST_NEXTH(hdr) ((hdr)->_nexth) 175 176 /* Routing header */ 177 #define IP6_ROUT_TYPE2 2 178 #define IP6_ROUT_RPL 3 179 180 #ifdef PACK_STRUCT_USE_INCLUDES 181 # include "arch/bpstruct.h" 182 #endif 183 PACK_STRUCT_BEGIN 184 struct ip6_rout_hdr { 185 /* next header */ 186 PACK_STRUCT_FLD_8(u8_t _nexth); 187 /* reserved */ 188 PACK_STRUCT_FLD_8(u8_t _hlen); 189 /* fragment offset */ 190 PACK_STRUCT_FIELD(u8_t _routing_type); 191 /* fragmented packet identification */ 192 PACK_STRUCT_FIELD(u8_t _segments_left); 193 } PACK_STRUCT_STRUCT; 194 PACK_STRUCT_END 195 #ifdef PACK_STRUCT_USE_INCLUDES 196 # include "arch/epstruct.h" 197 #endif 198 #define IP6_ROUT_NEXTH(hdr) ((hdr)->_nexth) 199 #define IP6_ROUT_TYPE(hdr) ((hdr)->_routing_type) 200 #define IP6_ROUT_SEG_LEFT(hdr) ((hdr)->_segments_left) 201 202 /* Fragment header. */ 203 #define IP6_FRAG_HLEN 8 204 #define IP6_FRAG_OFFSET_MASK 0xfff8 205 #define IP6_FRAG_MORE_FLAG 0x0001 206 207 #ifdef PACK_STRUCT_USE_INCLUDES 208 # include "arch/bpstruct.h" 209 #endif 210 PACK_STRUCT_BEGIN 211 struct ip6_frag_hdr { 212 /* next header */ 213 PACK_STRUCT_FLD_8(u8_t _nexth); 214 /* reserved */ 215 PACK_STRUCT_FLD_8(u8_t reserved); 216 /* fragment offset */ 217 PACK_STRUCT_FIELD(u16_t _fragment_offset); 218 /* fragmented packet identification */ 219 PACK_STRUCT_FIELD(u32_t _identification); 220 } PACK_STRUCT_STRUCT; 221 PACK_STRUCT_END 222 #ifdef PACK_STRUCT_USE_INCLUDES 223 # include "arch/epstruct.h" 224 #endif 225 #define IP6_FRAG_NEXTH(hdr) ((hdr)->_nexth) 226 #define IP6_FRAG_MBIT(hdr) (lwip_ntohs((hdr)->_fragment_offset) & 0x1) 227 #define IP6_FRAG_ID(hdr) (lwip_ntohl((hdr)->_identification)) 228 229 #ifdef __cplusplus 230 } 231 #endif 232 233 #endif /* LWIP_HDR_PROT_IP6_H */ 234