[IPV6]: Reorg struct ifmcaddr6 to save some bytes
[linux-2.6.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 #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         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
69 struct 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
81 struct 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
91 struct 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
107 struct 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 char           mca_crcount;
116         unsigned long           mca_sfcount[2];
117         struct timer_list       mca_timer;
118         unsigned                mca_flags;
119         int                     mca_users;
120         atomic_t                mca_refcnt;
121         spinlock_t              mca_lock;
122         unsigned long           mca_cstamp;
123         unsigned long           mca_tstamp;
124 };
125
126 /* Anycast stuff */
127
128 struct ipv6_ac_socklist
129 {
130         struct in6_addr         acl_addr;
131         int                     acl_ifindex;
132         struct ipv6_ac_socklist *acl_next;
133 };
134
135 struct 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
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 extern struct ipv6_devconf ipv6_devconf;
198
199 static inline void ipv6_eth_mc_map(struct in6_addr *addr, char *buf)
200 {
201         /*
202          *      +-------+-------+-------+-------+-------+-------+
203          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
204          *      +-------+-------+-------+-------+-------+-------+
205          */
206
207         buf[0]= 0x33;
208         buf[1]= 0x33;
209
210         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
211 }
212
213 static inline void ipv6_tr_mc_map(struct in6_addr *addr, char *buf)
214 {
215         /* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */
216
217         if (((addr->s6_addr[0] == 0xFF) &&
218             ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
219              (addr->s6_addr16[1] == 0) &&
220              (addr->s6_addr32[1] == 0) &&
221              (addr->s6_addr32[2] == 0) &&
222              (addr->s6_addr16[6] == 0) &&
223              (addr->s6_addr[15] == 1)) ||
224             ((addr->s6_addr[0] == 0xFF) &&
225              (addr->s6_addr[1] == 0x02) &&
226              (addr->s6_addr16[1] == 0) &&
227              (addr->s6_addr32[1] == 0) &&
228              (addr->s6_addr16[4] == 0) &&
229              (addr->s6_addr[10] == 0) &&
230              (addr->s6_addr[11] == 1) &&
231              (addr->s6_addr[12] == 0xff)))
232         {
233                 buf[0]=0xC0;
234                 buf[1]=0x00;
235                 buf[2]=0x01;
236                 buf[3]=0x00;
237                 buf[4]=0x00;
238                 buf[5]=0x00;
239         /* All routers FF0x::2 */
240         } else if ((addr->s6_addr[0] ==0xff) &&
241                 ((addr->s6_addr[1] & 0xF0) == 0) &&
242                 (addr->s6_addr16[1] == 0) &&
243                 (addr->s6_addr32[1] == 0) &&
244                 (addr->s6_addr32[2] == 0) &&
245                 (addr->s6_addr16[6] == 0) &&
246                 (addr->s6_addr[15] == 2))
247         {
248                 buf[0]=0xC0;
249                 buf[1]=0x00;
250                 buf[2]=0x02;
251                 buf[3]=0x00;
252                 buf[4]=0x00;
253                 buf[5]=0x00;
254         } else {
255                 unsigned char i ; 
256                 
257                 i = addr->s6_addr[15] & 7 ; 
258                 buf[0]=0xC0;
259                 buf[1]=0x00;
260                 buf[2]=0x00;
261                 buf[3]=0x01 << i ; 
262                 buf[4]=0x00;
263                 buf[5]=0x00;
264         }
265 }
266
267 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
268 {
269         buf[0] = 0x00;
270 }
271
272 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
273                                   const unsigned char *broadcast, char *buf)
274 {
275         unsigned char scope = broadcast[5] & 0xF;
276
277         buf[0]  = 0;            /* Reserved */
278         buf[1]  = 0xff;         /* Multicast QPN */
279         buf[2]  = 0xff;
280         buf[3]  = 0xff;
281         buf[4]  = 0xff;
282         buf[5]  = 0x10 | scope; /* scope from broadcast address */
283         buf[6]  = 0x60;         /* IPv6 signature */
284         buf[7]  = 0x1b;
285         buf[8]  = broadcast[8]; /* P_Key */
286         buf[9]  = broadcast[9];
287         memcpy(buf + 10, addr->s6_addr + 6, 10);
288 }
289 #endif
290 #endif