1 /*
2 * Types and definitions for AF_INET6
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Sources:
9 * IPv6 Program Interfaces for BSD Systems
10 * <draft-ietf-ipngwg-bsd-api-05.txt>
11 *
12 * Advanced Sockets API for IPv6
13 * <draft-stevens-advanced-api-00.txt>
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 */
20
21 #ifndef _LINUX_IN6_H
22 #define _LINUX_IN6_H
23
24 #include <linux/types.h>
25
26 /*
27 * IPv6 address structure
28 */
29
30 struct in6_addr
31 {
32 union
33 {
34 __u8 u6_addr8[16];
35 __be16 u6_addr16[8];
36 __be32 u6_addr32[4];
37 } in6_u;
38 #define s6_addr in6_u.u6_addr8
39 #define s6_addr16 in6_u.u6_addr16
40 #define s6_addr32 in6_u.u6_addr32
41 };
42
43 /* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553
44 * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined
45 * in network byte order, not in host byte order as are the IPv4 equivalents
46 */
47 extern const struct in6_addr in6addr_any;
48 #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
49 extern const struct in6_addr in6addr_loopback;
50 #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
51
52 struct sockaddr_in6 {
53 unsigned short int sin6_family; /* AF_INET6 */
54 __be16 sin6_port; /* Transport layer port # */
55 __be32 sin6_flowinfo; /* IPv6 flow information */
56 struct in6_addr sin6_addr; /* IPv6 address */
57 __u32 sin6_scope_id; /* scope id (new in RFC2553) */
58 };
59
60 struct ipv6_mreq {
61 /* IPv6 multicast address of group */
62 struct in6_addr ipv6mr_multiaddr;
63
64 /* local IPv6 address of interface */
65 int ipv6mr_ifindex;
66 };
67
68 #define ipv6mr_acaddr ipv6mr_multiaddr
69
70 struct in6_flowlabel_req
71 {
72 struct in6_addr flr_dst;
73 __be32 flr_label;
74 __u8 flr_action;
75 __u8 flr_share;
76 __u16 flr_flags;
77 __u16 flr_expires;
78 __u16 flr_linger;
79 __u32 __flr_pad;
80 /* Options in format of IPV6_PKTOPTIONS */
81 };
82
83 #define IPV6_FL_A_GET 0
84 #define IPV6_FL_A_PUT 1
85 #define IPV6_FL_A_RENEW 2
86
87 #define IPV6_FL_F_CREATE 1
88 #define IPV6_FL_F_EXCL 2
89
90 #define IPV6_FL_S_NONE 0
91 #define IPV6_FL_S_EXCL 1
92 #define IPV6_FL_S_PROCESS 2
93 #define IPV6_FL_S_USER 3
94 #define IPV6_FL_S_ANY 255
95
96
97 /*
98 * Bitmask constant declarations to help applications select out the
99 * flow label and priority fields.
100 *
101 * Note that this are in host byte order while the flowinfo field of
102 * sockaddr_in6 is in network byte order.
103 */
104
105 #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff
106 #define IPV6_FLOWINFO_PRIORITY 0x0ff00000
107
108 /* These defintions are obsolete */
109 #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000
110 #define IPV6_PRIORITY_FILLER 0x0100
111 #define IPV6_PRIORITY_UNATTENDED 0x0200
112 #define IPV6_PRIORITY_RESERVED1 0x0300
113 #define IPV6_PRIORITY_BULK 0x0400
114 #define IPV6_PRIORITY_RESERVED2 0x0500
115 #define IPV6_PRIORITY_INTERACTIVE 0x0600
116 #define IPV6_PRIORITY_CONTROL 0x0700
117 #define IPV6_PRIORITY_8 0x0800
118 #define IPV6_PRIORITY_9 0x0900
119 #define IPV6_PRIORITY_10 0x0a00
120 #define IPV6_PRIORITY_11 0x0b00
121 #define IPV6_PRIORITY_12 0x0c00
122 #define IPV6_PRIORITY_13 0x0d00
123 #define IPV6_PRIORITY_14 0x0e00
124 #define IPV6_PRIORITY_15 0x0f00
125
126 /*
127 * IPV6 extension headers
128 */
129 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */
130 #define IPPROTO_ROUTING 43 /* IPv6 routing header */
131 #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */
132 #define IPPROTO_ICMPV6 58 /* ICMPv6 */
133 #define IPPROTO_NONE 59 /* IPv6 no next header */
134 #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */
135 #define IPPROTO_MH 135 /* IPv6 mobility header */
136
137 /*
138 * IPv6 TLV options.
139 */
140 #define IPV6_TLV_PAD0 0
141 #define IPV6_TLV_PADN 1
142 #define IPV6_TLV_ROUTERALERT 5
143 #define IPV6_TLV_JUMBO 194
144 #define IPV6_TLV_HAO 201 /* home address option */
145
146 /*
147 * IPV6 socket options
148 */
149
150 #define IPV6_ADDRFORM 1
151 #define IPV6_2292PKTINFO 2
152 #define IPV6_2292HOPOPTS 3
153 #define IPV6_2292DSTOPTS 4
154 #define IPV6_2292RTHDR 5
155 #define IPV6_2292PKTOPTIONS 6
156 #define IPV6_CHECKSUM 7
157 #define IPV6_2292HOPLIMIT 8
158 #define IPV6_NEXTHOP 9
159 #define IPV6_AUTHHDR 10 /* obsolete */
160 #define IPV6_FLOWINFO 11
161
162 #define IPV6_UNICAST_HOPS 16
163 #define IPV6_MULTICAST_IF 17
164 #define IPV6_MULTICAST_HOPS 18
165 #define IPV6_MULTICAST_LOOP 19
166 #define IPV6_ADD_MEMBERSHIP 20
167 #define IPV6_DROP_MEMBERSHIP 21
168 #define IPV6_ROUTER_ALERT 22
169 #define IPV6_MTU_DISCOVER 23
170 #define IPV6_MTU 24
171 #define IPV6_RECVERR 25
172 #define IPV6_V6ONLY 26
173 #define IPV6_JOIN_ANYCAST 27
174 #define IPV6_LEAVE_ANYCAST 28
175
176 /* IPV6_MTU_DISCOVER values */
177 #define IPV6_PMTUDISC_DONT 0
178 #define IPV6_PMTUDISC_WANT 1
179 #define IPV6_PMTUDISC_DO 2
180 #define IPV6_PMTUDISC_PROBE 3
181
182 /* Flowlabel */
183 #define IPV6_FLOWLABEL_MGR 32
184 #define IPV6_FLOWINFO_SEND 33
185
186 #define IPV6_IPSEC_POLICY 34
187 #define IPV6_XFRM_POLICY 35
188
189 /*
190 * Multicast:
191 * Following socket options are shared between IPv4 and IPv6.
192 *
193 * MCAST_JOIN_GROUP 42
194 * MCAST_BLOCK_SOURCE 43
195 * MCAST_UNBLOCK_SOURCE 44
196 * MCAST_LEAVE_GROUP 45
197 * MCAST_JOIN_SOURCE_GROUP 46
198 * MCAST_LEAVE_SOURCE_GROUP 47
199 * MCAST_MSFILTER 48
200 */
201
202 /*
203 * Advanced API (RFC3542) (1)
204 *
205 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
206 */
207
208 #define IPV6_RECVPKTINFO 49
209 #define IPV6_PKTINFO 50
210 #define IPV6_RECVHOPLIMIT 51
211 #define IPV6_HOPLIMIT 52
212 #define IPV6_RECVHOPOPTS 53
213 #define IPV6_HOPOPTS 54
214 #define IPV6_RTHDRDSTOPTS 55
215 #define IPV6_RECVRTHDR 56
216 #define IPV6_RTHDR 57
217 #define IPV6_RECVDSTOPTS 58
218 #define IPV6_DSTOPTS 59
219 #if 0 /* not yet */
220 #define IPV6_RECVPATHMTU 60
221 #define IPV6_PATHMTU 61
222 #define IPV6_DONTFRAG 62
223 #define IPV6_USE_MIN_MTU 63
224 #endif
225
226 /*
227 * Netfilter (1)
228 *
229 * Following socket options are used in ip6_tables;
230 * see include/linux/netfilter_ipv6/ip6_tables.h.
231 *
232 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64
233 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65
234 */
235
236 /*
237 * Advanced API (RFC3542) (2)
238 */
239 #define IPV6_RECVTCLASS 66
240 #define IPV6_TCLASS 67
241
242 /*
243 * Netfilter (2)
244 *
245 * Following socket options are used in ip6_tables;
246 * see include/linux/netfilter_ipv6/ip6_tables.h.
247 *
248 * IP6T_SO_GET_REVISION_MATCH 68
249 * IP6T_SO_GET_REVISION_TARGET 69
250 */
251
252 #endif
253
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