xref: /openbmc/linux/include/net/if_inet6.h (revision b04b4f78)
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 
35 struct inet6_ifaddr
36 {
37 	struct in6_addr		addr;
38 	__u32			prefix_len;
39 
40 	__u32			valid_lft;
41 	__u32			prefered_lft;
42 	atomic_t		refcnt;
43 	spinlock_t		lock;
44 
45 	__u8			probes;
46 	__u8			flags;
47 
48 	__u16			scope;
49 
50 	unsigned long		cstamp;	/* created timestamp */
51 	unsigned long		tstamp; /* updated timestamp */
52 
53 	struct timer_list	timer;
54 
55 	struct inet6_dev	*idev;
56 	struct rt6_info		*rt;
57 
58 	struct inet6_ifaddr	*lst_next;      /* next addr in addr_lst */
59 	struct inet6_ifaddr	*if_next;       /* next addr in inet6_dev */
60 
61 #ifdef CONFIG_IPV6_PRIVACY
62 	struct inet6_ifaddr	*tmp_next;	/* next addr in tempaddr_lst */
63 	struct inet6_ifaddr	*ifpub;
64 	int			regen_count;
65 #endif
66 
67 	int			dead;
68 };
69 
70 struct ip6_sf_socklist
71 {
72 	unsigned int		sl_max;
73 	unsigned int		sl_count;
74 	struct in6_addr		sl_addr[0];
75 };
76 
77 #define IP6_SFLSIZE(count)	(sizeof(struct ip6_sf_socklist) + \
78 	(count) * sizeof(struct in6_addr))
79 
80 #define IP6_SFBLOCK	10	/* allocate this many at once */
81 
82 struct ipv6_mc_socklist
83 {
84 	struct in6_addr		addr;
85 	int			ifindex;
86 	struct ipv6_mc_socklist *next;
87 	rwlock_t		sflock;
88 	unsigned int		sfmode;		/* MCAST_{INCLUDE,EXCLUDE} */
89 	struct ip6_sf_socklist	*sflist;
90 };
91 
92 struct ip6_sf_list
93 {
94 	struct ip6_sf_list	*sf_next;
95 	struct in6_addr		sf_addr;
96 	unsigned long		sf_count[2];	/* include/exclude counts */
97 	unsigned char		sf_gsresp;	/* include in g & s response? */
98 	unsigned char		sf_oldin;	/* change state */
99 	unsigned char		sf_crcount;	/* retrans. left to send */
100 };
101 
102 #define MAF_TIMER_RUNNING	0x01
103 #define MAF_LAST_REPORTER	0x02
104 #define MAF_LOADED		0x04
105 #define MAF_NOREPORT		0x08
106 #define MAF_GSQUERY		0x10
107 
108 struct ifmcaddr6
109 {
110 	struct in6_addr		mca_addr;
111 	struct inet6_dev	*idev;
112 	struct ifmcaddr6	*next;
113 	struct ip6_sf_list	*mca_sources;
114 	struct ip6_sf_list	*mca_tomb;
115 	unsigned int		mca_sfmode;
116 	unsigned char		mca_crcount;
117 	unsigned long		mca_sfcount[2];
118 	struct timer_list	mca_timer;
119 	unsigned		mca_flags;
120 	int			mca_users;
121 	atomic_t		mca_refcnt;
122 	spinlock_t		mca_lock;
123 	unsigned long		mca_cstamp;
124 	unsigned long		mca_tstamp;
125 };
126 
127 /* Anycast stuff */
128 
129 struct ipv6_ac_socklist
130 {
131 	struct in6_addr		acl_addr;
132 	int			acl_ifindex;
133 	struct ipv6_ac_socklist *acl_next;
134 };
135 
136 struct ifacaddr6
137 {
138 	struct in6_addr		aca_addr;
139 	struct inet6_dev	*aca_idev;
140 	struct rt6_info		*aca_rt;
141 	struct ifacaddr6	*aca_next;
142 	int			aca_users;
143 	atomic_t		aca_refcnt;
144 	spinlock_t		aca_lock;
145 	unsigned long		aca_cstamp;
146 	unsigned long		aca_tstamp;
147 };
148 
149 #define	IFA_HOST	IPV6_ADDR_LOOPBACK
150 #define	IFA_LINK	IPV6_ADDR_LINKLOCAL
151 #define	IFA_SITE	IPV6_ADDR_SITELOCAL
152 
153 struct 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 	DEFINE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg);
158 };
159 
160 struct inet6_dev
161 {
162 	struct net_device		*dev;
163 
164 	struct inet6_ifaddr	*addr_list;
165 
166 	struct ifmcaddr6	*mc_list;
167 	struct ifmcaddr6	*mc_tomb;
168 	rwlock_t		mc_lock;
169 	unsigned char		mc_qrv;
170 	unsigned char		mc_gq_running;
171 	unsigned char		mc_ifc_count;
172 	unsigned long		mc_v1_seen;
173 	unsigned long		mc_maxdelay;
174 	struct timer_list	mc_gq_timer;	/* general query timer */
175 	struct timer_list	mc_ifc_timer;	/* interface change timer */
176 
177 	struct ifacaddr6	*ac_list;
178 	rwlock_t		lock;
179 	atomic_t		refcnt;
180 	__u32			if_flags;
181 	int			dead;
182 
183 #ifdef CONFIG_IPV6_PRIVACY
184 	u8			rndid[8];
185 	struct timer_list	regen_timer;
186 	struct inet6_ifaddr	*tempaddr_list;
187 #endif
188 
189 	struct neigh_parms	*nd_parms;
190 	struct inet6_dev	*next;
191 	struct ipv6_devconf	cnf;
192 	struct ipv6_devstat	stats;
193 	unsigned long		tstamp; /* ipv6InterfaceTable update timestamp */
194 	struct rcu_head		rcu;
195 };
196 
197 static inline void ipv6_eth_mc_map(struct in6_addr *addr, char *buf)
198 {
199 	/*
200 	 *	+-------+-------+-------+-------+-------+-------+
201 	 *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
202 	 *      +-------+-------+-------+-------+-------+-------+
203 	 */
204 
205 	buf[0]= 0x33;
206 	buf[1]= 0x33;
207 
208 	memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
209 }
210 
211 static inline void ipv6_tr_mc_map(struct in6_addr *addr, char *buf)
212 {
213 	/* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */
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 
265 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
266 {
267 	buf[0] = 0x00;
268 }
269 
270 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
271 				  const unsigned char *broadcast, char *buf)
272 {
273 	unsigned char scope = broadcast[5] & 0xF;
274 
275 	buf[0]  = 0;		/* Reserved */
276 	buf[1]  = 0xff;		/* Multicast QPN */
277 	buf[2]  = 0xff;
278 	buf[3]  = 0xff;
279 	buf[4]  = 0xff;
280 	buf[5]  = 0x10 | scope;	/* scope from broadcast address */
281 	buf[6]  = 0x60;		/* IPv6 signature */
282 	buf[7]  = 0x1b;
283 	buf[8]  = broadcast[8];	/* P_Key */
284 	buf[9]  = broadcast[9];
285 	memcpy(buf + 10, addr->s6_addr + 6, 10);
286 }
287 #endif
288 #endif
289