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 <adam@sics.se> 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 44extern "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 52PACK_STRUCT_BEGIN 53struct ip6_addr_packed { 54 PACK_STRUCT_FIELD(u32_t addr[4]); 55} PACK_STRUCT_STRUCT; 56PACK_STRUCT_END 57#ifdef PACK_STRUCT_USE_INCLUDES 58# include "arch/epstruct.h" 59#endif 60typedef 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 79PACK_STRUCT_BEGIN 80struct 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; 93PACK_STRUCT_END 94#ifdef PACK_STRUCT_USE_INCLUDES 95# include "arch/epstruct.h" 96#endif 97 98/* Hop-by-hop router alert option. */ 99#define IP6_HBH_HLEN 8 100#define IP6_PAD1_OPTION 0 101#define IP6_PADN_ALERT_OPTION 1 102#define IP6_ROUTER_ALERT_OPTION 5 103#define IP6_ROUTER_ALERT_VALUE_MLD 0 104#ifdef PACK_STRUCT_USE_INCLUDES 105# include "arch/bpstruct.h" 106#endif 107PACK_STRUCT_BEGIN 108struct ip6_hbh_hdr { 109 /* next header */ 110 PACK_STRUCT_FLD_8(u8_t _nexth); 111 /* header length */ 112 PACK_STRUCT_FLD_8(u8_t _hlen); 113 /* router alert option type */ 114 PACK_STRUCT_FLD_8(u8_t _ra_opt_type); 115 /* router alert option data len */ 116 PACK_STRUCT_FLD_8(u8_t _ra_opt_dlen); 117 /* router alert option data */ 118 PACK_STRUCT_FIELD(u16_t _ra_opt_data); 119 /* PadN option type */ 120 PACK_STRUCT_FLD_8(u8_t _padn_opt_type); 121 /* PadN option data len */ 122 PACK_STRUCT_FLD_8(u8_t _padn_opt_dlen); 123} PACK_STRUCT_STRUCT; 124PACK_STRUCT_END 125#ifdef PACK_STRUCT_USE_INCLUDES 126# include "arch/epstruct.h" 127#endif 128 129/* Fragment header. */ 130#define IP6_FRAG_HLEN 8 131#define IP6_FRAG_OFFSET_MASK 0xfff8 132#define IP6_FRAG_MORE_FLAG 0x0001 133#ifdef PACK_STRUCT_USE_INCLUDES 134# include "arch/bpstruct.h" 135#endif 136PACK_STRUCT_BEGIN 137struct ip6_frag_hdr { 138 /* next header */ 139 PACK_STRUCT_FLD_8(u8_t _nexth); 140 /* reserved */ 141 PACK_STRUCT_FLD_8(u8_t reserved); 142 /* fragment offset */ 143 PACK_STRUCT_FIELD(u16_t _fragment_offset); 144 /* fragmented packet identification */ 145 PACK_STRUCT_FIELD(u32_t _identification); 146} PACK_STRUCT_STRUCT; 147PACK_STRUCT_END 148#ifdef PACK_STRUCT_USE_INCLUDES 149# include "arch/epstruct.h" 150#endif 151 152#define IP6H_V(hdr) ((lwip_ntohl((hdr)->_v_tc_fl) >> 28) & 0x0f) 153#define IP6H_TC(hdr) ((lwip_ntohl((hdr)->_v_tc_fl) >> 20) & 0xff) 154#define IP6H_FL(hdr) (lwip_ntohl((hdr)->_v_tc_fl) & 0x000fffff) 155#define IP6H_PLEN(hdr) (lwip_ntohs((hdr)->_plen)) 156#define IP6H_NEXTH(hdr) ((hdr)->_nexth) 157#define IP6H_NEXTH_P(hdr) ((u8_t *)(hdr) + 6) 158#define IP6H_HOPLIM(hdr) ((hdr)->_hoplim) 159 160#define IP6H_VTCFL_SET(hdr, v, tc, fl) (hdr)->_v_tc_fl = (lwip_htonl((((u32_t)(v)) << 28) | (((u32_t)(tc)) << 20) | (fl))) 161#define IP6H_PLEN_SET(hdr, plen) (hdr)->_plen = lwip_htons(plen) 162#define IP6H_NEXTH_SET(hdr, nexth) (hdr)->_nexth = (nexth) 163#define IP6H_HOPLIM_SET(hdr, hl) (hdr)->_hoplim = (u8_t)(hl) 164 165#ifdef __cplusplus 166} 167#endif 168 169#endif /* LWIP_HDR_PROT_IP6_H */ 170