source: azure_iot_hub_f767zi/trunk/asp_baseplatform/lwip/lwip-2.1.2/src/include/lwip/prot/ip6.h@ 457

Last change on this file since 457 was 457, checked in by coas-nagasima, 4 years ago

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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#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
121PACK_STRUCT_BEGIN
122struct 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;
128PACK_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
144PACK_STRUCT_BEGIN
145struct 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;
151PACK_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
163PACK_STRUCT_BEGIN
164struct 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;
170PACK_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
183PACK_STRUCT_BEGIN
184struct 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;
194PACK_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
210PACK_STRUCT_BEGIN
211struct 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;
221PACK_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 */
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