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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
30struct 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
48extern 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
51extern 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
54struct 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
62struct 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
72struct 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