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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 #include <linux/refcount.h>
 21 
 22 /* inet6_dev.if_flags */
 23 
 24 #define IF_RA_OTHERCONF 0x80
 25 #define IF_RA_MANAGED   0x40
 26 #define IF_RA_RCVD      0x20
 27 #define IF_RS_SENT      0x10
 28 #define IF_READY        0x80000000
 29 
 30 /* prefix flags */
 31 #define IF_PREFIX_ONLINK        0x01
 32 #define IF_PREFIX_AUTOCONF      0x02
 33 
 34 enum {
 35         INET6_IFADDR_STATE_PREDAD,
 36         INET6_IFADDR_STATE_DAD,
 37         INET6_IFADDR_STATE_POSTDAD,
 38         INET6_IFADDR_STATE_ERRDAD,
 39         INET6_IFADDR_STATE_DEAD,
 40 };
 41 
 42 struct inet6_ifaddr {
 43         struct in6_addr         addr;
 44         __u32                   prefix_len;
 45         __u32                   rt_priority;
 46 
 47         /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
 48         __u32                   valid_lft;
 49         __u32                   prefered_lft;
 50         refcount_t              refcnt;
 51         spinlock_t              lock;
 52 
 53         int                     state;
 54 
 55         __u32                   flags;
 56         __u8                    dad_probes;
 57         __u8                    stable_privacy_retry;
 58 
 59         __u16                   scope;
 60         __u64                   dad_nonce;
 61 
 62         unsigned long           cstamp; /* created timestamp */
 63         unsigned long           tstamp; /* updated timestamp */
 64 
 65         struct delayed_work     dad_work;
 66 
 67         struct inet6_dev        *idev;
 68         struct fib6_info        *rt;
 69 
 70         struct hlist_node       addr_lst;
 71         struct list_head        if_list;
 72 
 73         struct list_head        tmp_list;
 74         struct inet6_ifaddr     *ifpub;
 75         int                     regen_count;
 76 
 77         bool                    tokenized;
 78 
 79         struct rcu_head         rcu;
 80         struct in6_addr         peer_addr;
 81 };
 82 
 83 struct ip6_sf_socklist {
 84         unsigned int            sl_max;
 85         unsigned int            sl_count;
 86         struct in6_addr         sl_addr[0];
 87 };
 88 
 89 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
 90         (count) * sizeof(struct in6_addr))
 91 
 92 #define IP6_SFBLOCK     10      /* allocate this many at once */
 93 
 94 struct ipv6_mc_socklist {
 95         struct in6_addr         addr;
 96         int                     ifindex;
 97         struct ipv6_mc_socklist __rcu *next;
 98         rwlock_t                sflock;
 99         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
100         struct ip6_sf_socklist  *sflist;
101         struct rcu_head         rcu;
102 };
103 
104 struct ip6_sf_list {
105         struct ip6_sf_list      *sf_next;
106         struct in6_addr         sf_addr;
107         unsigned long           sf_count[2];    /* include/exclude counts */
108         unsigned char           sf_gsresp;      /* include in g & s response? */
109         unsigned char           sf_oldin;       /* change state */
110         unsigned char           sf_crcount;     /* retrans. left to send */
111 };
112 
113 #define MAF_TIMER_RUNNING       0x01
114 #define MAF_LAST_REPORTER       0x02
115 #define MAF_LOADED              0x04
116 #define MAF_NOREPORT            0x08
117 #define MAF_GSQUERY             0x10
118 
119 struct ifmcaddr6 {
120         struct in6_addr         mca_addr;
121         struct inet6_dev        *idev;
122         struct ifmcaddr6        *next;
123         struct ip6_sf_list      *mca_sources;
124         struct ip6_sf_list      *mca_tomb;
125         unsigned int            mca_sfmode;
126         unsigned char           mca_crcount;
127         unsigned long           mca_sfcount[2];
128         struct timer_list       mca_timer;
129         unsigned int            mca_flags;
130         int                     mca_users;
131         refcount_t              mca_refcnt;
132         spinlock_t              mca_lock;
133         unsigned long           mca_cstamp;
134         unsigned long           mca_tstamp;
135 };
136 
137 /* Anycast stuff */
138 
139 struct ipv6_ac_socklist {
140         struct in6_addr         acl_addr;
141         int                     acl_ifindex;
142         struct ipv6_ac_socklist *acl_next;
143 };
144 
145 struct ifacaddr6 {
146         struct in6_addr         aca_addr;
147         struct fib6_info        *aca_rt;
148         struct ifacaddr6        *aca_next;
149         struct hlist_node       aca_addr_lst;
150         int                     aca_users;
151         refcount_t              aca_refcnt;
152         unsigned long           aca_cstamp;
153         unsigned long           aca_tstamp;
154         struct rcu_head         rcu;
155 };
156 
157 #define IFA_HOST        IPV6_ADDR_LOOPBACK
158 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
159 #define IFA_SITE        IPV6_ADDR_SITELOCAL
160 
161 struct ipv6_devstat {
162         struct proc_dir_entry   *proc_dir_entry;
163         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
164         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
165         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
166 };
167 
168 struct inet6_dev {
169         struct net_device       *dev;
170 
171         struct list_head        addr_list;
172 
173         struct ifmcaddr6        *mc_list;
174         struct ifmcaddr6        *mc_tomb;
175         spinlock_t              mc_lock;
176 
177         unsigned char           mc_qrv;         /* Query Robustness Variable */
178         unsigned char           mc_gq_running;
179         unsigned char           mc_ifc_count;
180         unsigned char           mc_dad_count;
181 
182         unsigned long           mc_v1_seen;     /* Max time we stay in MLDv1 mode */
183         unsigned long           mc_qi;          /* Query Interval */
184         unsigned long           mc_qri;         /* Query Response Interval */
185         unsigned long           mc_maxdelay;
186 
187         struct timer_list       mc_gq_timer;    /* general query timer */
188         struct timer_list       mc_ifc_timer;   /* interface change timer */
189         struct timer_list       mc_dad_timer;   /* dad complete mc timer */
190 
191         struct ifacaddr6        *ac_list;
192         rwlock_t                lock;
193         refcount_t              refcnt;
194         __u32                   if_flags;
195         int                     dead;
196 
197         u32                     desync_factor;
198         u8                      rndid[8];
199         struct list_head        tempaddr_list;
200 
201         struct in6_addr         token;
202 
203         struct neigh_parms      *nd_parms;
204         struct ipv6_devconf     cnf;
205         struct ipv6_devstat     stats;
206 
207         struct timer_list       rs_timer;
208         __s32                   rs_interval;    /* in jiffies */
209         __u8                    rs_probes;
210 
211         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
212         struct rcu_head         rcu;
213 };
214 
215 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
216 {
217         /*
218          *      +-------+-------+-------+-------+-------+-------+
219          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
220          *      +-------+-------+-------+-------+-------+-------+
221          */
222 
223         buf[0]= 0x33;
224         buf[1]= 0x33;
225 
226         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
227 }
228 
229 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
230 {
231         buf[0] = 0x00;
232 }
233 
234 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
235                                   const unsigned char *broadcast, char *buf)
236 {
237         unsigned char scope = broadcast[5] & 0xF;
238 
239         buf[0]  = 0;            /* Reserved */
240         buf[1]  = 0xff;         /* Multicast QPN */
241         buf[2]  = 0xff;
242         buf[3]  = 0xff;
243         buf[4]  = 0xff;
244         buf[5]  = 0x10 | scope; /* scope from broadcast address */
245         buf[6]  = 0x60;         /* IPv6 signature */
246         buf[7]  = 0x1b;
247         buf[8]  = broadcast[8]; /* P_Key */
248         buf[9]  = broadcast[9];
249         memcpy(buf + 10, addr->s6_addr + 6, 10);
250 }
251 
252 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
253                                     const unsigned char *broadcast, char *buf)
254 {
255         if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
256                 memcpy(buf, broadcast, 4);
257         } else {
258                 /* v4mapped? */
259                 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
260                      (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
261                         return -EINVAL;
262                 memcpy(buf, &addr->s6_addr32[3], 4);
263         }
264         return 0;
265 }
266 
267 #endif
268 

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