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
33enum {
34	INET6_IFADDR_STATE_PREDAD,
35	INET6_IFADDR_STATE_DAD,
36	INET6_IFADDR_STATE_POSTDAD,
37	INET6_IFADDR_STATE_ERRDAD,
38	INET6_IFADDR_STATE_DEAD,
39};
40
41struct inet6_ifaddr {
42	struct in6_addr		addr;
43	__u32			prefix_len;
44
45	/* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
46	__u32			valid_lft;
47	__u32			prefered_lft;
48	atomic_t		refcnt;
49	spinlock_t		lock;
50	spinlock_t		state_lock;
51
52	int			state;
53
54	__u32			flags;
55	__u8			dad_probes;
56
57	__u16			scope;
58
59	unsigned long		cstamp;	/* created timestamp */
60	unsigned long		tstamp; /* updated timestamp */
61
62	struct delayed_work	dad_work;
63
64	struct inet6_dev	*idev;
65	struct rt6_info		*rt;
66
67	struct hlist_node	addr_lst;
68	struct list_head	if_list;
69
70	struct list_head	tmp_list;
71	struct inet6_ifaddr	*ifpub;
72	int			regen_count;
73
74	bool			tokenized;
75
76	struct rcu_head		rcu;
77	struct in6_addr		peer_addr;
78};
79
80struct ip6_sf_socklist {
81	unsigned int		sl_max;
82	unsigned int		sl_count;
83	struct in6_addr		sl_addr[0];
84};
85
86#define IP6_SFLSIZE(count)	(sizeof(struct ip6_sf_socklist) + \
87	(count) * sizeof(struct in6_addr))
88
89#define IP6_SFBLOCK	10	/* allocate this many at once */
90
91struct ipv6_mc_socklist {
92	struct in6_addr		addr;
93	int			ifindex;
94	struct ipv6_mc_socklist __rcu *next;
95	rwlock_t		sflock;
96	unsigned int		sfmode;		/* MCAST_{INCLUDE,EXCLUDE} */
97	struct ip6_sf_socklist	*sflist;
98	struct rcu_head		rcu;
99};
100
101struct ip6_sf_list {
102	struct ip6_sf_list	*sf_next;
103	struct in6_addr		sf_addr;
104	unsigned long		sf_count[2];	/* include/exclude counts */
105	unsigned char		sf_gsresp;	/* include in g & s response? */
106	unsigned char		sf_oldin;	/* change state */
107	unsigned char		sf_crcount;	/* retrans. left to send */
108};
109
110#define MAF_TIMER_RUNNING	0x01
111#define MAF_LAST_REPORTER	0x02
112#define MAF_LOADED		0x04
113#define MAF_NOREPORT		0x08
114#define MAF_GSQUERY		0x10
115
116struct ifmcaddr6 {
117	struct in6_addr		mca_addr;
118	struct inet6_dev	*idev;
119	struct ifmcaddr6	*next;
120	struct ip6_sf_list	*mca_sources;
121	struct ip6_sf_list	*mca_tomb;
122	unsigned int		mca_sfmode;
123	unsigned char		mca_crcount;
124	unsigned long		mca_sfcount[2];
125	struct timer_list	mca_timer;
126	unsigned int		mca_flags;
127	int			mca_users;
128	atomic_t		mca_refcnt;
129	spinlock_t		mca_lock;
130	unsigned long		mca_cstamp;
131	unsigned long		mca_tstamp;
132};
133
134/* Anycast stuff */
135
136struct ipv6_ac_socklist {
137	struct in6_addr		acl_addr;
138	int			acl_ifindex;
139	struct ipv6_ac_socklist *acl_next;
140};
141
142struct ifacaddr6 {
143	struct in6_addr		aca_addr;
144	struct inet6_dev	*aca_idev;
145	struct rt6_info		*aca_rt;
146	struct ifacaddr6	*aca_next;
147	int			aca_users;
148	atomic_t		aca_refcnt;
149	unsigned long		aca_cstamp;
150	unsigned long		aca_tstamp;
151};
152
153#define	IFA_HOST	IPV6_ADDR_LOOPBACK
154#define	IFA_LINK	IPV6_ADDR_LINKLOCAL
155#define	IFA_SITE	IPV6_ADDR_SITELOCAL
156
157struct ipv6_devstat {
158	struct proc_dir_entry	*proc_dir_entry;
159	DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
160	DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
161	DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
162};
163
164struct inet6_dev {
165	struct net_device	*dev;
166
167	struct list_head	addr_list;
168
169	struct ifmcaddr6	*mc_list;
170	struct ifmcaddr6	*mc_tomb;
171	spinlock_t		mc_lock;
172
173	unsigned char		mc_qrv;		/* Query Robustness Variable */
174	unsigned char		mc_gq_running;
175	unsigned char		mc_ifc_count;
176	unsigned char		mc_dad_count;
177
178	unsigned long		mc_v1_seen;	/* Max time we stay in MLDv1 mode */
179	unsigned long		mc_qi;		/* Query Interval */
180	unsigned long		mc_qri;		/* Query Response Interval */
181	unsigned long		mc_maxdelay;
182
183	struct timer_list	mc_gq_timer;	/* general query timer */
184	struct timer_list	mc_ifc_timer;	/* interface change timer */
185	struct timer_list	mc_dad_timer;	/* dad complete mc timer */
186
187	struct ifacaddr6	*ac_list;
188	rwlock_t		lock;
189	atomic_t		refcnt;
190	__u32			if_flags;
191	int			dead;
192
193	u8			rndid[8];
194	struct timer_list	regen_timer;
195	struct list_head	tempaddr_list;
196
197	struct in6_addr		token;
198
199	struct neigh_parms	*nd_parms;
200	struct ipv6_devconf	cnf;
201	struct ipv6_devstat	stats;
202
203	struct timer_list	rs_timer;
204	__u8			rs_probes;
205
206	__u8			addr_gen_mode;
207	unsigned long		tstamp; /* ipv6InterfaceTable update timestamp */
208	struct rcu_head		rcu;
209};
210
211static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
212{
213	/*
214	 *	+-------+-------+-------+-------+-------+-------+
215	 *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
216	 *      +-------+-------+-------+-------+-------+-------+
217	 */
218
219	buf[0]= 0x33;
220	buf[1]= 0x33;
221
222	memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
223}
224
225static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
226{
227	buf[0] = 0x00;
228}
229
230static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
231				  const unsigned char *broadcast, char *buf)
232{
233	unsigned char scope = broadcast[5] & 0xF;
234
235	buf[0]  = 0;		/* Reserved */
236	buf[1]  = 0xff;		/* Multicast QPN */
237	buf[2]  = 0xff;
238	buf[3]  = 0xff;
239	buf[4]  = 0xff;
240	buf[5]  = 0x10 | scope;	/* scope from broadcast address */
241	buf[6]  = 0x60;		/* IPv6 signature */
242	buf[7]  = 0x1b;
243	buf[8]  = broadcast[8];	/* P_Key */
244	buf[9]  = broadcast[9];
245	memcpy(buf + 10, addr->s6_addr + 6, 10);
246}
247
248static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
249				    const unsigned char *broadcast, char *buf)
250{
251	if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
252		memcpy(buf, broadcast, 4);
253	} else {
254		/* v4mapped? */
255		if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
256		     (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
257			return -EINVAL;
258		memcpy(buf, &addr->s6_addr32[3], 4);
259	}
260	return 0;
261}
262
263#endif
264