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 __u16 u6_addr16[8];
36 __u32 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 #if 0
48 extern const struct in6_addr in6addr_any;
49 #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
50 #endif
51 extern const struct in6_addr in6addr_loopback;
52 #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
53
54 struct sockaddr_in6 {
55 unsigned short int sin6_family; /* AF_INET6 */
56 __u16 sin6_port; /* Transport layer port # */
57 __u32 sin6_flowinfo; /* IPv6 flow information */
58 struct in6_addr sin6_addr; /* IPv6 address */
59 __u32 sin6_scope_id; /* scope id (new in RFC2553) */
60 };
61
62 struct ipv6_mreq {
63 /* IPv6 multicast address of group */
64 struct in6_addr ipv6mr_multiaddr;
65
66 /* local IPv6 address of interface */
67 int ipv6mr_ifindex;
68 };
69
70 #define ipv6mr_acaddr ipv6mr_multiaddr
71
72 struct in6_flowlabel_req
73 {
74 struct in6_addr flr_dst;
75 __u32 flr_label;
76 __u8 flr_action;
77 __u8 flr_share;
78 __u16 flr_flags;
79 __u16 flr_expires;
80 __u16 flr_linger;
81 __u32 __flr_pad;
82 /* Options in format of IPV6_PKTOPTIONS */
83 };
84
85 #define IPV6_FL_A_GET 0
86 #define IPV6_FL_A_PUT 1
87 #define IPV6_FL_A_RENEW 2
88
89 #define IPV6_FL_F_CREATE 1
90 #define IPV6_FL_F_EXCL 2
91
92 #define IPV6_FL_S_NONE 0
93 #define IPV6_FL_S_EXCL 1
94 #define IPV6_FL_S_PROCESS 2
95 #define IPV6_FL_S_USER 3
96 #define IPV6_FL_S_ANY 255
97
98
99 /*
100 * Bitmask constant declarations to help applications select out the
101 * flow label and priority fields.
102 *
103 * Note that this are in host byte order while the flowinfo field of
104 * sockaddr_in6 is in network byte order.
105 */
106
107 #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff
108 #define IPV6_FLOWINFO_PRIORITY 0x0ff00000
109
110 /* These defintions are obsolete */
111 #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000
112 #define IPV6_PRIORITY_FILLER 0x0100
113 #define IPV6_PRIORITY_UNATTENDED 0x0200
114 #define IPV6_PRIORITY_RESERVED1 0x0300
115 #define IPV6_PRIORITY_BULK 0x0400
116 #define IPV6_PRIORITY_RESERVED2 0x0500
117 #define IPV6_PRIORITY_INTERACTIVE 0x0600
118 #define IPV6_PRIORITY_CONTROL 0x0700
119 #define IPV6_PRIORITY_8 0x0800
120 #define IPV6_PRIORITY_9 0x0900
121 #define IPV6_PRIORITY_10 0x0a00
122 #define IPV6_PRIORITY_11 0x0b00
123 #define IPV6_PRIORITY_12 0x0c00
124 #define IPV6_PRIORITY_13 0x0d00
125 #define IPV6_PRIORITY_14 0x0e00
126 #define IPV6_PRIORITY_15 0x0f00
127
128 /*
129 * IPV6 extension headers
130 */
131 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */
132 #define IPPROTO_ROUTING 43 /* IPv6 routing header */
133 #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */
134 #define IPPROTO_ICMPV6 58 /* ICMPv6 */
135 #define IPPROTO_NONE 59 /* IPv6 no next header */
136 #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */
137
138 /*
139 * IPv6 TLV options.
140 */
141 #define IPV6_TLV_PAD0 0
142 #define IPV6_TLV_PADN 1
143 #define IPV6_TLV_ROUTERALERT 5
144 #define IPV6_TLV_JUMBO 194
145
146 /*
147 * IPV6 socket options
148 */
149
150 #define IPV6_ADDRFORM 1
151 #define IPV6_PKTINFO 2
152 #define IPV6_HOPOPTS 3
153 #define IPV6_DSTOPTS 4
154 #define IPV6_RTHDR 5
155 #define IPV6_PKTOPTIONS 6
156 #define IPV6_CHECKSUM 7
157 #define IPV6_HOPLIMIT 8
158 #define IPV6_NEXTHOP 9
159 #define IPV6_AUTHHDR 10
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
181 /* Flowlabel */
182 #define IPV6_FLOWLABEL_MGR 32
183 #define IPV6_FLOWINFO_SEND 33
184
185 #define IPV6_IPSEC_POLICY 34
186 #define IPV6_XFRM_POLICY 35
187
188 /*
189 * Multicast:
190 * Following socket options are shared between IPv4 and IPv6.
191 *
192 * MCAST_JOIN_GROUP 42
193 * MCAST_BLOCK_SOURCE 43
194 * MCAST_UNBLOCK_SOURCE 44
195 * MCAST_LEAVE_GROUP 45
196 * MCAST_JOIN_SOURCE_GROUP 46
197 * MCAST_LEAVE_SOURCE_GROUP 47
198 * MCAST_MSFILTER 48
199 */
200
201 #endif
202
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