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Linux/include/net/if_inet6.h

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  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_DEAD,
 39 };
 40 
 41 struct 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 
 51         int                     state;
 52 
 53         __u32                   flags;
 54         __u8                    dad_probes;
 55         __u8                    stable_privacy_retry;
 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 
 80 struct 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 
 91 struct 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 
101 struct 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 
116 struct 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 
136 struct ipv6_ac_socklist {
137         struct in6_addr         acl_addr;
138         int                     acl_ifindex;
139         struct ipv6_ac_socklist *acl_next;
140 };
141 
142 struct 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 
157 struct 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 
164 struct 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 
211 static 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 
225 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
226 {
227         buf[0] = 0x00;
228 }
229 
230 static 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 
248 static 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 

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