1/*
2 *	inet6 interface/address list definitions
3 *	Linux INET6 implementation
4 *
5 *	Authors:
6 *	Pedro Roque		<roque@di.fc.ul.pt>
7 *
8 *
9 *	This program is free software; you can redistribute it and/or
10 *      modify it under the terms of the GNU General Public License
11 *      as published by the Free Software Foundation; either version
12 *      2 of the License, or (at your option) any later version.
13 */
14
15#ifndef _NET_IF_INET6_H
16#define _NET_IF_INET6_H
17
18#include <net/snmp.h>
19#include <linux/ipv6.h>
20
21/* inet6_dev.if_flags */
22
23#define IF_RA_OTHERCONF	0x80
24#define IF_RA_MANAGED	0x40
25#define IF_RA_RCVD	0x20
26#define IF_RS_SENT	0x10
27#define IF_READY	0x80000000
28
29/* prefix flags */
30#define IF_PREFIX_ONLINK	0x01
31#define IF_PREFIX_AUTOCONF	0x02
32
33#ifdef __KERNEL__
34
35struct inet6_ifaddr
36{
37	struct in6_addr		addr;
38	__u32			prefix_len;
39
40	__u32			valid_lft;
41	__u32			prefered_lft;
42	unsigned long		cstamp;	/* created timestamp */
43	unsigned long		tstamp; /* updated timestamp */
44	atomic_t		refcnt;
45	spinlock_t		lock;
46
47	__u8			probes;
48	__u8			flags;
49
50	__u16			scope;
51
52	struct timer_list	timer;
53
54	struct inet6_dev	*idev;
55	struct rt6_info		*rt;
56
57	struct inet6_ifaddr	*lst_next;      /* next addr in addr_lst */
58	struct inet6_ifaddr	*if_next;       /* next addr in inet6_dev */
59
60#ifdef CONFIG_IPV6_PRIVACY
61	struct inet6_ifaddr	*tmp_next;	/* next addr in tempaddr_lst */
62	struct inet6_ifaddr	*ifpub;
63	int			regen_count;
64#endif
65
66	int			dead;
67};
68
69struct ip6_sf_socklist
70{
71	unsigned int		sl_max;
72	unsigned int		sl_count;
73	struct in6_addr		sl_addr[0];
74};
75
76#define IP6_SFLSIZE(count)	(sizeof(struct ip6_sf_socklist) + \
77	(count) * sizeof(struct in6_addr))
78
79#define IP6_SFBLOCK	10	/* allocate this many at once */
80
81struct ipv6_mc_socklist
82{
83	struct in6_addr		addr;
84	int			ifindex;
85	struct ipv6_mc_socklist *next;
86	rwlock_t		sflock;
87	unsigned int		sfmode;		/* MCAST_{INCLUDE,EXCLUDE} */
88	struct ip6_sf_socklist	*sflist;
89};
90
91struct ip6_sf_list
92{
93	struct ip6_sf_list	*sf_next;
94	struct in6_addr		sf_addr;
95	unsigned long		sf_count[2];	/* include/exclude counts */
96	unsigned char		sf_gsresp;	/* include in g & s response? */
97	unsigned char		sf_oldin;	/* change state */
98	unsigned char		sf_crcount;	/* retrans. left to send */
99};
100
101#define MAF_TIMER_RUNNING	0x01
102#define MAF_LAST_REPORTER	0x02
103#define MAF_LOADED		0x04
104#define MAF_NOREPORT		0x08
105#define MAF_GSQUERY		0x10
106
107struct ifmcaddr6
108{
109	struct in6_addr		mca_addr;
110	struct inet6_dev	*idev;
111	struct ifmcaddr6	*next;
112	struct ip6_sf_list	*mca_sources;
113	struct ip6_sf_list	*mca_tomb;
114	unsigned int		mca_sfmode;
115	unsigned long		mca_sfcount[2];
116	struct timer_list	mca_timer;
117	unsigned		mca_flags;
118	int			mca_users;
119	atomic_t		mca_refcnt;
120	spinlock_t		mca_lock;
121	unsigned char		mca_crcount;
122	unsigned long		mca_cstamp;
123	unsigned long		mca_tstamp;
124};
125
126/* Anycast stuff */
127
128struct ipv6_ac_socklist
129{
130	struct in6_addr		acl_addr;
131	int			acl_ifindex;
132	struct ipv6_ac_socklist *acl_next;
133};
134
135struct ifacaddr6
136{
137	struct in6_addr		aca_addr;
138	struct inet6_dev	*aca_idev;
139	struct rt6_info		*aca_rt;
140	struct ifacaddr6	*aca_next;
141	int			aca_users;
142	atomic_t		aca_refcnt;
143	spinlock_t		aca_lock;
144	unsigned long		aca_cstamp;
145	unsigned long		aca_tstamp;
146};
147
148#define	IFA_HOST	IPV6_ADDR_LOOPBACK
149#define	IFA_LINK	IPV6_ADDR_LINKLOCAL
150#define	IFA_SITE	IPV6_ADDR_SITELOCAL
151#define	IFA_GLOBAL	0x0000U
152
153struct ipv6_devstat {
154	struct proc_dir_entry	*proc_dir_entry;
155	DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
156	DEFINE_SNMP_STAT(struct icmpv6_mib, icmpv6);
157};
158
159struct inet6_dev
160{
161	struct net_device		*dev;
162
163	struct inet6_ifaddr	*addr_list;
164
165	struct ifmcaddr6	*mc_list;
166	struct ifmcaddr6	*mc_tomb;
167	rwlock_t		mc_lock;
168	unsigned long		mc_v1_seen;
169	unsigned long		mc_maxdelay;
170	unsigned char		mc_qrv;
171	unsigned char		mc_gq_running;
172	unsigned char		mc_ifc_count;
173	struct timer_list	mc_gq_timer;	/* general query timer */
174	struct timer_list	mc_ifc_timer;	/* interface change timer */
175
176	struct ifacaddr6	*ac_list;
177	rwlock_t		lock;
178	atomic_t		refcnt;
179	__u32			if_flags;
180	int			dead;
181
182#ifdef CONFIG_IPV6_PRIVACY
183	u8			rndid[8];
184	struct timer_list	regen_timer;
185	struct inet6_ifaddr	*tempaddr_list;
186#endif
187
188	struct neigh_parms	*nd_parms;
189	struct inet6_dev	*next;
190	struct ipv6_devconf	cnf;
191	struct ipv6_devstat	stats;
192	unsigned long		tstamp; /* ipv6InterfaceTable update timestamp */
193	struct rcu_head		rcu;
194};
195
196extern struct ipv6_devconf ipv6_devconf;
197
198static inline void ipv6_eth_mc_map(struct in6_addr *addr, char *buf)
199{
200	/*
201	 *	+-------+-------+-------+-------+-------+-------+
202	 *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
203	 *      +-------+-------+-------+-------+-------+-------+
204	 */
205
206	buf[0]= 0x33;
207	buf[1]= 0x33;
208
209	memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
210}
211
212static inline void ipv6_tr_mc_map(struct in6_addr *addr, char *buf)
213{
214
215	if (((addr->s6_addr[0] == 0xFF) &&
216	    ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
217	     (addr->s6_addr16[1] == 0) &&
218	     (addr->s6_addr32[1] == 0) &&
219	     (addr->s6_addr32[2] == 0) &&
220	     (addr->s6_addr16[6] == 0) &&
221	     (addr->s6_addr[15] == 1)) ||
222	    ((addr->s6_addr[0] == 0xFF) &&
223	     (addr->s6_addr[1] == 0x02) &&
224	     (addr->s6_addr16[1] == 0) &&
225	     (addr->s6_addr32[1] == 0) &&
226	     (addr->s6_addr16[4] == 0) &&
227	     (addr->s6_addr[10] == 0) &&
228	     (addr->s6_addr[11] == 1) &&
229	     (addr->s6_addr[12] == 0xff)))
230	{
231		buf[0]=0xC0;
232		buf[1]=0x00;
233		buf[2]=0x01;
234		buf[3]=0x00;
235		buf[4]=0x00;
236		buf[5]=0x00;
237	/* All routers FF0x::2 */
238	} else if ((addr->s6_addr[0] ==0xff) &&
239		((addr->s6_addr[1] & 0xF0) == 0) &&
240		(addr->s6_addr16[1] == 0) &&
241		(addr->s6_addr32[1] == 0) &&
242		(addr->s6_addr32[2] == 0) &&
243		(addr->s6_addr16[6] == 0) &&
244		(addr->s6_addr[15] == 2))
245	{
246		buf[0]=0xC0;
247		buf[1]=0x00;
248		buf[2]=0x02;
249		buf[3]=0x00;
250		buf[4]=0x00;
251		buf[5]=0x00;
252	} else {
253		unsigned char i ;
254
255		i = addr->s6_addr[15] & 7 ;
256		buf[0]=0xC0;
257		buf[1]=0x00;
258		buf[2]=0x00;
259		buf[3]=0x01 << i ;
260		buf[4]=0x00;
261		buf[5]=0x00;
262	}
263}
264
265static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
266{
267	buf[0] = 0x00;
268}
269
270static inline void ipv6_ib_mc_map(struct in6_addr *addr, char *buf)
271{
272	buf[0]  = 0;		/* Reserved */
273	buf[1]  = 0xff;		/* Multicast QPN */
274	buf[2]  = 0xff;
275	buf[3]  = 0xff;
276	buf[4]  = 0xff;
277	buf[5]  = 0x12;		/* link local scope */
278	buf[6]  = 0x60;		/* IPv6 signature */
279	buf[7]  = 0x1b;
280	buf[8]  = 0;		/* P_Key */
281	buf[9]  = 0;
282	memcpy(buf + 10, addr->s6_addr + 6, 10);
283}
284#endif
285#endif
286