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
30struct 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 */
47extern 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 } } }
49extern 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
52struct 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
60struct 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
70struct 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
220/*
221 * Netfilter (1)
222 *
223 * Following socket options are used in ip6_tables;
224 * see include/linux/netfilter_ipv6/ip6_tables.h.
225 *
226 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO		64
227 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES	65
228 */
229
230/*
231 * Advanced API (RFC3542) (2)
232 */
233#define IPV6_RECVTCLASS		66
234#define IPV6_TCLASS		67
235
236/*
237 * Netfilter (2)
238 *
239 * Following socket options are used in ip6_tables;
240 * see include/linux/netfilter_ipv6/ip6_tables.h.
241 *
242 * IP6T_SO_GET_REVISION_MATCH	68
243 * IP6T_SO_GET_REVISION_TARGET	69
244 */
245
246#endif
247