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b168057a | 1 | /* Copyright (C) 1991-2015 Free Software Foundation, Inc. |
bfbc5754 UD |
2 | This file is part of the GNU C Library. |
3 | ||
478b92f0 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
bfbc5754 UD |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
478b92f0 | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 | 12 | Lesser General Public License for more details. |
bfbc5754 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
bfbc5754 UD |
17 | |
18 | #ifndef _NETINET_IP6_H | |
19 | #define _NETINET_IP6_H 1 | |
20 | ||
3996f34b | 21 | #include <inttypes.h> |
bfbc5754 | 22 | #include <netinet/in.h> |
3996f34b | 23 | |
8fee1bb0 | 24 | struct ip6_hdr |
3996f34b | 25 | { |
8fee1bb0 | 26 | union |
3996f34b | 27 | { |
8fee1bb0 | 28 | struct ip6_hdrctl |
3996f34b | 29 | { |
8fee1bb0 UD |
30 | uint32_t ip6_un1_flow; /* 4 bits version, 8 bits TC, |
31 | 20 bits flow-ID */ | |
3996f34b UD |
32 | uint16_t ip6_un1_plen; /* payload length */ |
33 | uint8_t ip6_un1_nxt; /* next header */ | |
34 | uint8_t ip6_un1_hlim; /* hop limit */ | |
35 | } ip6_un1; | |
8fee1bb0 | 36 | uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits tclass */ |
3996f34b UD |
37 | } ip6_ctlun; |
38 | struct in6_addr ip6_src; /* source address */ | |
39 | struct in6_addr ip6_dst; /* destination address */ | |
40 | }; | |
41 | ||
42 | #define ip6_vfc ip6_ctlun.ip6_un2_vfc | |
43 | #define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow | |
44 | #define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen | |
45 | #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt | |
46 | #define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim | |
47 | #define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim | |
48 | ||
a4596570 UD |
49 | /* Generic extension header. */ |
50 | struct ip6_ext | |
51 | { | |
52 | uint8_t ip6e_nxt; /* next header. */ | |
53 | uint8_t ip6e_len; /* length in units of 8 octets. */ | |
54 | }; | |
55 | ||
3996f34b | 56 | /* Hop-by-Hop options header. */ |
8fee1bb0 | 57 | struct ip6_hbh |
3996f34b | 58 | { |
a4596570 UD |
59 | uint8_t ip6h_nxt; /* next header. */ |
60 | uint8_t ip6h_len; /* length in units of 8 octets. */ | |
3996f34b UD |
61 | /* followed by options */ |
62 | }; | |
63 | ||
64 | /* Destination options header */ | |
8fee1bb0 | 65 | struct ip6_dest |
3996f34b | 66 | { |
a4596570 UD |
67 | uint8_t ip6d_nxt; /* next header */ |
68 | uint8_t ip6d_len; /* length in units of 8 octets */ | |
3996f34b UD |
69 | /* followed by options */ |
70 | }; | |
71 | ||
72 | /* Routing header */ | |
8fee1bb0 | 73 | struct ip6_rthdr |
3996f34b | 74 | { |
a4596570 UD |
75 | uint8_t ip6r_nxt; /* next header */ |
76 | uint8_t ip6r_len; /* length in units of 8 octets */ | |
77 | uint8_t ip6r_type; /* routing type */ | |
78 | uint8_t ip6r_segleft; /* segments left */ | |
3996f34b UD |
79 | /* followed by routing type specific data */ |
80 | }; | |
81 | ||
82 | /* Type 0 Routing header */ | |
8fee1bb0 | 83 | struct ip6_rthdr0 |
3996f34b | 84 | { |
a4596570 UD |
85 | uint8_t ip6r0_nxt; /* next header */ |
86 | uint8_t ip6r0_len; /* length in units of 8 octets */ | |
87 | uint8_t ip6r0_type; /* always zero */ | |
88 | uint8_t ip6r0_segleft; /* segments left */ | |
89 | uint8_t ip6r0_reserved; /* reserved field */ | |
90 | uint8_t ip6r0_slmap[3]; /* strict/loose bit map */ | |
07bfff20 UD |
91 | /* followed by up to 127 struct in6_addr */ |
92 | struct in6_addr ip6r0_addr[0]; | |
3996f34b UD |
93 | }; |
94 | ||
95 | /* Fragment header */ | |
8fee1bb0 | 96 | struct ip6_frag |
3996f34b | 97 | { |
a4596570 UD |
98 | uint8_t ip6f_nxt; /* next header */ |
99 | uint8_t ip6f_reserved; /* reserved field */ | |
100 | uint16_t ip6f_offlg; /* offset, reserved, and flag */ | |
101 | uint32_t ip6f_ident; /* identification */ | |
3996f34b UD |
102 | }; |
103 | ||
07bfff20 UD |
104 | #if BYTE_ORDER == BIG_ENDIAN |
105 | # define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */ | |
106 | # define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */ | |
107 | # define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */ | |
3996f34b | 108 | #else /* BYTE_ORDER == LITTLE_ENDIAN */ |
07bfff20 UD |
109 | # define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */ |
110 | # define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */ | |
111 | # define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */ | |
bfbc5754 | 112 | #endif |
bfbc5754 | 113 | |
c2280dc0 UD |
114 | /* IPv6 options */ |
115 | struct ip6_opt | |
116 | { | |
117 | uint8_t ip6o_type; | |
118 | uint8_t ip6o_len; | |
119 | }; | |
120 | ||
121 | /* The high-order 3 bits of the option type define the behavior | |
122 | * when processing an unknown option and whether or not the option | |
123 | * content changes in flight. | |
124 | */ | |
125 | #define IP6OPT_TYPE(o) ((o) & 0xc0) | |
126 | #define IP6OPT_TYPE_SKIP 0x00 | |
127 | #define IP6OPT_TYPE_DISCARD 0x40 | |
128 | #define IP6OPT_TYPE_FORCEICMP 0x80 | |
129 | #define IP6OPT_TYPE_ICMP 0xc0 | |
130 | #define IP6OPT_TYPE_MUTABLE 0x20 | |
131 | ||
a4596570 UD |
132 | /* Special option types for padding. */ |
133 | #define IP6OPT_PAD1 0 | |
134 | #define IP6OPT_PADN 1 | |
135 | ||
c2280dc0 UD |
136 | #define IP6OPT_JUMBO 0xc2 |
137 | #define IP6OPT_NSAP_ADDR 0xc3 | |
138 | #define IP6OPT_TUNNEL_LIMIT 0x04 | |
139 | #define IP6OPT_ROUTER_ALERT 0x05 | |
140 | ||
141 | /* Jumbo Payload Option */ | |
142 | struct ip6_opt_jumbo | |
143 | { | |
144 | uint8_t ip6oj_type; | |
145 | uint8_t ip6oj_len; | |
146 | uint8_t ip6oj_jumbo_len[4]; | |
147 | }; | |
148 | #define IP6OPT_JUMBO_LEN 6 | |
149 | ||
150 | /* NSAP Address Option */ | |
151 | struct ip6_opt_nsap | |
152 | { | |
153 | uint8_t ip6on_type; | |
154 | uint8_t ip6on_len; | |
155 | uint8_t ip6on_src_nsap_len; | |
156 | uint8_t ip6on_dst_nsap_len; | |
157 | /* followed by source NSAP */ | |
158 | /* followed by destination NSAP */ | |
159 | }; | |
160 | ||
161 | /* Tunnel Limit Option */ | |
162 | struct ip6_opt_tunnel | |
163 | { | |
164 | uint8_t ip6ot_type; | |
165 | uint8_t ip6ot_len; | |
166 | uint8_t ip6ot_encap_limit; | |
167 | }; | |
168 | ||
169 | /* Router Alert Option */ | |
170 | struct ip6_opt_router | |
171 | { | |
172 | uint8_t ip6or_type; | |
173 | uint8_t ip6or_len; | |
174 | uint8_t ip6or_value[2]; | |
175 | }; | |
176 | ||
177 | /* Router alert values (in network byte order) */ | |
07bfff20 | 178 | #if BYTE_ORDER == BIG_ENDIAN |
c2280dc0 UD |
179 | # define IP6_ALERT_MLD 0x0000 |
180 | # define IP6_ALERT_RSVP 0x0001 | |
181 | # define IP6_ALERT_AN 0x0002 | |
182 | #else /* BYTE_ORDER == LITTLE_ENDING */ | |
183 | # define IP6_ALERT_MLD 0x0000 | |
184 | # define IP6_ALERT_RSVP 0x0100 | |
185 | # define IP6_ALERT_AN 0x0200 | |
186 | #endif | |
187 | ||
5107cf1d | 188 | #endif /* netinet/ip6.h */ |