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Viewing changes to include/net/if_inet6.h

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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include/net/if_inet6.h
 
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
enum {
 
34
        INET6_IFADDR_STATE_DAD,
 
35
        INET6_IFADDR_STATE_POSTDAD,
 
36
        INET6_IFADDR_STATE_UP,
 
37
        INET6_IFADDR_STATE_DEAD,
 
38
};
 
39
 
 
40
struct inet6_ifaddr {
 
41
        struct in6_addr         addr;
 
42
        __u32                   prefix_len;
 
43
        
 
44
        /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
 
45
        __u32                   valid_lft;
 
46
        __u32                   prefered_lft;
 
47
        atomic_t                refcnt;
 
48
        spinlock_t              lock;
 
49
        spinlock_t              state_lock;
 
50
 
 
51
        int                     state;
 
52
 
 
53
        __u8                    probes;
 
54
        __u8                    flags;
 
55
 
 
56
        __u16                   scope;
 
57
 
 
58
        unsigned long           cstamp; /* created timestamp */
 
59
        unsigned long           tstamp; /* updated timestamp */
 
60
 
 
61
        struct timer_list       timer;
 
62
 
 
63
        struct inet6_dev        *idev;
 
64
        struct rt6_info         *rt;
 
65
 
 
66
        struct hlist_node       addr_lst;
 
67
        struct list_head        if_list;
 
68
 
 
69
#ifdef CONFIG_IPV6_PRIVACY
 
70
        struct list_head        tmp_list;
 
71
        struct inet6_ifaddr     *ifpub;
 
72
        int                     regen_count;
 
73
#endif
 
74
        struct rcu_head         rcu;
 
75
};
 
76
 
 
77
struct ip6_sf_socklist {
 
78
        unsigned int            sl_max;
 
79
        unsigned int            sl_count;
 
80
        struct in6_addr         sl_addr[0];
 
81
};
 
82
 
 
83
#define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
 
84
        (count) * sizeof(struct in6_addr))
 
85
 
 
86
#define IP6_SFBLOCK     10      /* allocate this many at once */
 
87
 
 
88
struct ipv6_mc_socklist {
 
89
        struct in6_addr         addr;
 
90
        int                     ifindex;
 
91
        struct ipv6_mc_socklist __rcu *next;
 
92
        rwlock_t                sflock;
 
93
        unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
 
94
        struct ip6_sf_socklist  *sflist;
 
95
        struct rcu_head         rcu;
 
96
};
 
97
 
 
98
struct ip6_sf_list {
 
99
        struct ip6_sf_list      *sf_next;
 
100
        struct in6_addr         sf_addr;
 
101
        unsigned long           sf_count[2];    /* include/exclude counts */
 
102
        unsigned char           sf_gsresp;      /* include in g & s response? */
 
103
        unsigned char           sf_oldin;       /* change state */
 
104
        unsigned char           sf_crcount;     /* retrans. left to send */
 
105
};
 
106
 
 
107
#define MAF_TIMER_RUNNING       0x01
 
108
#define MAF_LAST_REPORTER       0x02
 
109
#define MAF_LOADED              0x04
 
110
#define MAF_NOREPORT            0x08
 
111
#define MAF_GSQUERY             0x10
 
112
 
 
113
struct ifmcaddr6 {
 
114
        struct in6_addr         mca_addr;
 
115
        struct inet6_dev        *idev;
 
116
        struct ifmcaddr6        *next;
 
117
        struct ip6_sf_list      *mca_sources;
 
118
        struct ip6_sf_list      *mca_tomb;
 
119
        unsigned int            mca_sfmode;
 
120
        unsigned char           mca_crcount;
 
121
        unsigned long           mca_sfcount[2];
 
122
        struct timer_list       mca_timer;
 
123
        unsigned                mca_flags;
 
124
        int                     mca_users;
 
125
        atomic_t                mca_refcnt;
 
126
        spinlock_t              mca_lock;
 
127
        unsigned long           mca_cstamp;
 
128
        unsigned long           mca_tstamp;
 
129
};
 
130
 
 
131
/* Anycast stuff */
 
132
 
 
133
struct ipv6_ac_socklist {
 
134
        struct in6_addr         acl_addr;
 
135
        int                     acl_ifindex;
 
136
        struct ipv6_ac_socklist *acl_next;
 
137
};
 
138
 
 
139
struct ifacaddr6 {
 
140
        struct in6_addr         aca_addr;
 
141
        struct inet6_dev        *aca_idev;
 
142
        struct rt6_info         *aca_rt;
 
143
        struct ifacaddr6        *aca_next;
 
144
        int                     aca_users;
 
145
        atomic_t                aca_refcnt;
 
146
        spinlock_t              aca_lock;
 
147
        unsigned long           aca_cstamp;
 
148
        unsigned long           aca_tstamp;
 
149
};
 
150
 
 
151
#define IFA_HOST        IPV6_ADDR_LOOPBACK
 
152
#define IFA_LINK        IPV6_ADDR_LINKLOCAL
 
153
#define IFA_SITE        IPV6_ADDR_SITELOCAL
 
154
 
 
155
struct ipv6_devstat {
 
156
        struct proc_dir_entry   *proc_dir_entry;
 
157
        DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
 
158
        DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
 
159
        DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
 
160
};
 
161
 
 
162
struct inet6_dev {
 
163
        struct net_device       *dev;
 
164
 
 
165
        struct list_head        addr_list;
 
166
 
 
167
        struct ifmcaddr6        *mc_list;
 
168
        struct ifmcaddr6        *mc_tomb;
 
169
        spinlock_t              mc_lock;
 
170
        unsigned char           mc_qrv;
 
171
        unsigned char           mc_gq_running;
 
172
        unsigned char           mc_ifc_count;
 
173
        unsigned long           mc_v1_seen;
 
174
        unsigned long           mc_maxdelay;
 
175
        struct timer_list       mc_gq_timer;    /* general query timer */
 
176
        struct timer_list       mc_ifc_timer;   /* interface change timer */
 
177
 
 
178
        struct ifacaddr6        *ac_list;
 
179
        rwlock_t                lock;
 
180
        atomic_t                refcnt;
 
181
        __u32                   if_flags;
 
182
        int                     dead;
 
183
 
 
184
#ifdef CONFIG_IPV6_PRIVACY
 
185
        u8                      rndid[8];
 
186
        struct timer_list       regen_timer;
 
187
        struct list_head        tempaddr_list;
 
188
#endif
 
189
 
 
190
        struct neigh_parms      *nd_parms;
 
191
        struct inet6_dev        *next;
 
192
        struct ipv6_devconf     cnf;
 
193
        struct ipv6_devstat     stats;
 
194
        unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
 
195
        struct rcu_head         rcu;
 
196
};
 
197
 
 
198
static inline void ipv6_eth_mc_map(const 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
 
 
212
static inline void ipv6_tr_mc_map(const struct in6_addr *addr, char *buf)
 
213
{
 
214
        /* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */
 
215
 
 
216
        if (((addr->s6_addr[0] == 0xFF) &&
 
217
            ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
 
218
             (addr->s6_addr16[1] == 0) &&
 
219
             (addr->s6_addr32[1] == 0) &&
 
220
             (addr->s6_addr32[2] == 0) &&
 
221
             (addr->s6_addr16[6] == 0) &&
 
222
             (addr->s6_addr[15] == 1)) ||
 
223
            ((addr->s6_addr[0] == 0xFF) &&
 
224
             (addr->s6_addr[1] == 0x02) &&
 
225
             (addr->s6_addr16[1] == 0) &&
 
226
             (addr->s6_addr32[1] == 0) &&
 
227
             (addr->s6_addr16[4] == 0) &&
 
228
             (addr->s6_addr[10] == 0) &&
 
229
             (addr->s6_addr[11] == 1) &&
 
230
             (addr->s6_addr[12] == 0xff)))
 
231
        {
 
232
                buf[0]=0xC0;
 
233
                buf[1]=0x00;
 
234
                buf[2]=0x01;
 
235
                buf[3]=0x00;
 
236
                buf[4]=0x00;
 
237
                buf[5]=0x00;
 
238
        /* All routers FF0x::2 */
 
239
        } else if ((addr->s6_addr[0] ==0xff) &&
 
240
                ((addr->s6_addr[1] & 0xF0) == 0) &&
 
241
                (addr->s6_addr16[1] == 0) &&
 
242
                (addr->s6_addr32[1] == 0) &&
 
243
                (addr->s6_addr32[2] == 0) &&
 
244
                (addr->s6_addr16[6] == 0) &&
 
245
                (addr->s6_addr[15] == 2))
 
246
        {
 
247
                buf[0]=0xC0;
 
248
                buf[1]=0x00;
 
249
                buf[2]=0x02;
 
250
                buf[3]=0x00;
 
251
                buf[4]=0x00;
 
252
                buf[5]=0x00;
 
253
        } else {
 
254
                unsigned char i ; 
 
255
                
 
256
                i = addr->s6_addr[15] & 7 ; 
 
257
                buf[0]=0xC0;
 
258
                buf[1]=0x00;
 
259
                buf[2]=0x00;
 
260
                buf[3]=0x01 << i ; 
 
261
                buf[4]=0x00;
 
262
                buf[5]=0x00;
 
263
        }
 
264
}
 
265
 
 
266
static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
 
267
{
 
268
        buf[0] = 0x00;
 
269
}
 
270
 
 
271
static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
 
272
                                  const unsigned char *broadcast, char *buf)
 
273
{
 
274
        unsigned char scope = broadcast[5] & 0xF;
 
275
 
 
276
        buf[0]  = 0;            /* Reserved */
 
277
        buf[1]  = 0xff;         /* Multicast QPN */
 
278
        buf[2]  = 0xff;
 
279
        buf[3]  = 0xff;
 
280
        buf[4]  = 0xff;
 
281
        buf[5]  = 0x10 | scope; /* scope from broadcast address */
 
282
        buf[6]  = 0x60;         /* IPv6 signature */
 
283
        buf[7]  = 0x1b;
 
284
        buf[8]  = broadcast[8]; /* P_Key */
 
285
        buf[9]  = broadcast[9];
 
286
        memcpy(buf + 10, addr->s6_addr + 6, 10);
 
287
}
 
288
 
 
289
static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
 
290
                                    const unsigned char *broadcast, char *buf)
 
291
{
 
292
        if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
 
293
                memcpy(buf, broadcast, 4);
 
294
        } else {
 
295
                /* v4mapped? */
 
296
                if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
 
297
                     (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
 
298
                        return -EINVAL;
 
299
                memcpy(buf, &addr->s6_addr32[3], 4);
 
300
        }
 
301
        return 0;
 
302
}
 
303
 
 
304
#endif