Merge tag 'dm-3.17-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device...
[linux-2.6-microblaze.git] / 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_PREDAD,
35         INET6_IFADDR_STATE_DAD,
36         INET6_IFADDR_STATE_POSTDAD,
37         INET6_IFADDR_STATE_ERRDAD,
38         INET6_IFADDR_STATE_UP,
39         INET6_IFADDR_STATE_DEAD,
40 };
41
42 struct inet6_ifaddr {
43         struct in6_addr         addr;
44         __u32                   prefix_len;
45         
46         /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
47         __u32                   valid_lft;
48         __u32                   prefered_lft;
49         atomic_t                refcnt;
50         spinlock_t              lock;
51         spinlock_t              state_lock;
52
53         int                     state;
54
55         __u32                   flags;
56         __u8                    dad_probes;
57
58         __u16                   scope;
59
60         unsigned long           cstamp; /* created timestamp */
61         unsigned long           tstamp; /* updated timestamp */
62
63         struct delayed_work     dad_work;
64
65         struct inet6_dev        *idev;
66         struct rt6_info         *rt;
67
68         struct hlist_node       addr_lst;
69         struct list_head        if_list;
70
71         struct list_head        tmp_list;
72         struct inet6_ifaddr     *ifpub;
73         int                     regen_count;
74
75         bool                    tokenized;
76
77         struct rcu_head         rcu;
78         struct in6_addr         peer_addr;
79 };
80
81 struct ip6_sf_socklist {
82         unsigned int            sl_max;
83         unsigned int            sl_count;
84         struct in6_addr         sl_addr[0];
85 };
86
87 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
88         (count) * sizeof(struct in6_addr))
89
90 #define IP6_SFBLOCK     10      /* allocate this many at once */
91
92 struct ipv6_mc_socklist {
93         struct in6_addr         addr;
94         int                     ifindex;
95         struct ipv6_mc_socklist __rcu *next;
96         rwlock_t                sflock;
97         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
98         struct ip6_sf_socklist  *sflist;
99         struct rcu_head         rcu;
100 };
101
102 struct ip6_sf_list {
103         struct ip6_sf_list      *sf_next;
104         struct in6_addr         sf_addr;
105         unsigned long           sf_count[2];    /* include/exclude counts */
106         unsigned char           sf_gsresp;      /* include in g & s response? */
107         unsigned char           sf_oldin;       /* change state */
108         unsigned char           sf_crcount;     /* retrans. left to send */
109 };
110
111 #define MAF_TIMER_RUNNING       0x01
112 #define MAF_LAST_REPORTER       0x02
113 #define MAF_LOADED              0x04
114 #define MAF_NOREPORT            0x08
115 #define MAF_GSQUERY             0x10
116
117 struct ifmcaddr6 {
118         struct in6_addr         mca_addr;
119         struct inet6_dev        *idev;
120         struct ifmcaddr6        *next;
121         struct ip6_sf_list      *mca_sources;
122         struct ip6_sf_list      *mca_tomb;
123         unsigned int            mca_sfmode;
124         unsigned char           mca_crcount;
125         unsigned long           mca_sfcount[2];
126         struct timer_list       mca_timer;
127         unsigned int            mca_flags;
128         int                     mca_users;
129         atomic_t                mca_refcnt;
130         spinlock_t              mca_lock;
131         unsigned long           mca_cstamp;
132         unsigned long           mca_tstamp;
133 };
134
135 /* Anycast stuff */
136
137 struct ipv6_ac_socklist {
138         struct in6_addr         acl_addr;
139         int                     acl_ifindex;
140         struct ipv6_ac_socklist *acl_next;
141 };
142
143 struct ifacaddr6 {
144         struct in6_addr         aca_addr;
145         struct inet6_dev        *aca_idev;
146         struct rt6_info         *aca_rt;
147         struct ifacaddr6        *aca_next;
148         int                     aca_users;
149         atomic_t                aca_refcnt;
150         spinlock_t              aca_lock;
151         unsigned long           aca_cstamp;
152         unsigned long           aca_tstamp;
153 };
154
155 #define IFA_HOST        IPV6_ADDR_LOOPBACK
156 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
157 #define IFA_SITE        IPV6_ADDR_SITELOCAL
158
159 struct ipv6_devstat {
160         struct proc_dir_entry   *proc_dir_entry;
161         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
162         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
163         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
164 };
165
166 struct inet6_dev {
167         struct net_device       *dev;
168
169         struct list_head        addr_list;
170
171         struct ifmcaddr6        *mc_list;
172         struct ifmcaddr6        *mc_tomb;
173         spinlock_t              mc_lock;
174
175         unsigned char           mc_qrv;         /* Query Robustness Variable */
176         unsigned char           mc_gq_running;
177         unsigned char           mc_ifc_count;
178         unsigned char           mc_dad_count;
179
180         unsigned long           mc_v1_seen;     /* Max time we stay in MLDv1 mode */
181         unsigned long           mc_qi;          /* Query Interval */
182         unsigned long           mc_qri;         /* Query Response Interval */
183         unsigned long           mc_maxdelay;
184
185         struct timer_list       mc_gq_timer;    /* general query timer */
186         struct timer_list       mc_ifc_timer;   /* interface change timer */
187         struct timer_list       mc_dad_timer;   /* dad complete mc timer */
188
189         struct ifacaddr6        *ac_list;
190         rwlock_t                lock;
191         atomic_t                refcnt;
192         __u32                   if_flags;
193         int                     dead;
194
195         u8                      rndid[8];
196         struct timer_list       regen_timer;
197         struct list_head        tempaddr_list;
198
199         struct in6_addr         token;
200
201         struct neigh_parms      *nd_parms;
202         struct ipv6_devconf     cnf;
203         struct ipv6_devstat     stats;
204
205         struct timer_list       rs_timer;
206         __u8                    rs_probes;
207
208         __u8                    addr_gen_mode;
209         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
210         struct rcu_head         rcu;
211 };
212
213 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
214 {
215         /*
216          *      +-------+-------+-------+-------+-------+-------+
217          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
218          *      +-------+-------+-------+-------+-------+-------+
219          */
220
221         buf[0]= 0x33;
222         buf[1]= 0x33;
223
224         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
225 }
226
227 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
228 {
229         buf[0] = 0x00;
230 }
231
232 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
233                                   const unsigned char *broadcast, char *buf)
234 {
235         unsigned char scope = broadcast[5] & 0xF;
236
237         buf[0]  = 0;            /* Reserved */
238         buf[1]  = 0xff;         /* Multicast QPN */
239         buf[2]  = 0xff;
240         buf[3]  = 0xff;
241         buf[4]  = 0xff;
242         buf[5]  = 0x10 | scope; /* scope from broadcast address */
243         buf[6]  = 0x60;         /* IPv6 signature */
244         buf[7]  = 0x1b;
245         buf[8]  = broadcast[8]; /* P_Key */
246         buf[9]  = broadcast[9];
247         memcpy(buf + 10, addr->s6_addr + 6, 10);
248 }
249
250 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
251                                     const unsigned char *broadcast, char *buf)
252 {
253         if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
254                 memcpy(buf, broadcast, 4);
255         } else {
256                 /* v4mapped? */
257                 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
258                      (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
259                         return -EINVAL;
260                 memcpy(buf, &addr->s6_addr32[3], 4);
261         }
262         return 0;
263 }
264
265 #endif