include/net/addrconf.h

   1 #ifndef _ADDRCONF_H
   2 #define _ADDRCONF_H
   3
   4 #define RETRANS_TIMER   HZ
   5
   6 #define MAX_RTR_SOLICITATIONS           3
   7 #define RTR_SOLICITATION_INTERVAL       (4*HZ)
   8
   9 #define MIN_VALID_LIFETIME              (2*3600)        /* 2 hours */
  10
  11 #define TEMP_VALID_LIFETIME             (7*86400)
  12 #define TEMP_PREFERRED_LIFETIME         (86400)
  13 #define REGEN_MAX_RETRY                 (5)
  14 #define MAX_DESYNC_FACTOR               (600)
  15
  16 #define ADDR_CHECK_FREQUENCY            (120*HZ)
  17
  18 #define IPV6_MAX_ADDRESSES              16
  19
  20 #include <linux/in6.h>
  21
  22 struct prefix_info {
  23         __u8                    type;
  24         __u8                    length;
  25         __u8                    prefix_len;
  26
  27 #if defined(__BIG_ENDIAN_BITFIELD)
  28         __u8                    onlink : 1,
  29                                 autoconf : 1,
  30                                 reserved : 6;
  31 #elif defined(__LITTLE_ENDIAN_BITFIELD)
  32         __u8                    reserved : 6,
  33                                 autoconf : 1,
  34                                 onlink : 1;
  35 #else
  36 #error "Please fix <asm/byteorder.h>"
  37 #endif
  38         __u32                   valid;
  39         __u32                   prefered;
  40         __u32                   reserved2;
  41
  42         struct in6_addr         prefix;
  43 };
  44
  45
  46 #ifdef __KERNEL__
  47
  48 #include <linux/netdevice.h>
  49 #include <net/if_inet6.h>
  50 #include <net/ipv6.h>
  51
  52 #define IN6_ADDR_HSIZE          16
  53
  54 extern int                      addrconf_init(void);
  55 extern void                     addrconf_cleanup(void);
  56
  57 extern int                      addrconf_add_ifaddr(void __user *arg);
  58 extern int                      addrconf_del_ifaddr(void __user *arg);
  59 extern int                      addrconf_set_dstaddr(void __user *arg);
  60
  61 extern int                      ipv6_chk_addr(struct in6_addr *addr,
  62                                               struct net_device *dev,
  63                                               int strict);
  64 extern struct inet6_ifaddr *    ipv6_get_ifaddr(struct in6_addr *addr,
  65                                                 struct net_device *dev,
  66                                                 int strict);
  67 extern int                      ipv6_get_saddr(struct dst_entry *dst,
  68                                                struct in6_addr *daddr,
  69                                                struct in6_addr *saddr);
  70 extern int                      ipv6_dev_get_saddr(struct net_device *dev,
  71                                                struct in6_addr *daddr,
  72                                                struct in6_addr *saddr);
  73 extern int                      ipv6_get_lladdr(struct net_device *dev, struct in6_addr *);
  74 extern int                      ipv6_rcv_saddr_equal(const struct sock *sk,
  75                                                       const struct sock *sk2);
  76 extern void                     addrconf_join_solict(struct net_device *dev,
  77                                         struct in6_addr *addr);
  78 extern void                     addrconf_leave_solict(struct inet6_dev *idev,
  79                                         struct in6_addr *addr);
  80
  81 /*
  82  *      multicast prototypes (mcast.c)
  83  */
  84 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
  85                   struct in6_addr *addr);
  86 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
  87                   struct in6_addr *addr);
  88 extern void ipv6_sock_mc_close(struct sock *sk);
  89 extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
  90                 struct in6_addr *src_addr);
  91
  92 extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
  93 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
  94 extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
  95 extern void ipv6_mc_up(struct inet6_dev *idev);
  96 extern void ipv6_mc_down(struct inet6_dev *idev);
  97 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
  98 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
  99 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
 100
 101 extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
 102                 struct in6_addr *src_addr);
 103 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
 104
 105 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
 106
 107 extern int ipv6_get_hoplimit(struct net_device *dev);
 108
 109 /*
 110  *      anycast prototypes (anycast.c)
 111  */
 112 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
 113 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
 114 extern void ipv6_sock_ac_close(struct sock *sk);
 115 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
 116
 117 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
 118 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
 119 extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
 120
 121
 122 /* Device notifier */
 123 extern int register_inet6addr_notifier(struct notifier_block *nb);
 124 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
 125
 126 static inline struct inet6_dev *
 127 __in6_dev_get(struct net_device *dev)
 128 {
 129         return (struct inet6_dev *)dev->ip6_ptr;
 130 }
 131
 132 extern rwlock_t addrconf_lock;
 133
 134 static inline struct inet6_dev *
 135 in6_dev_get(struct net_device *dev)
 136 {
 137         struct inet6_dev *idev = NULL;
 138         read_lock(&addrconf_lock);
 139         idev = dev->ip6_ptr;
 140         if (idev)
 141                 atomic_inc(&idev->refcnt);
 142         read_unlock(&addrconf_lock);
 143         return idev;
 144 }
 145
 146 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
 147
 148 static inline void
 149 in6_dev_put(struct inet6_dev *idev)
 150 {
 151         if (atomic_dec_and_test(&idev->refcnt))
 152                 in6_dev_finish_destroy(idev);
 153 }
 154
 155 #define __in6_dev_put(idev)  atomic_dec(&(idev)->refcnt)
 156 #define in6_dev_hold(idev)   atomic_inc(&(idev)->refcnt)
 157
 158
 159 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
 160
 161 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
 162 {
 163         if (atomic_dec_and_test(&ifp->refcnt))
 164                 inet6_ifa_finish_destroy(ifp);
 165 }
 166
 167 #define __in6_ifa_put(ifp)      atomic_dec(&(ifp)->refcnt)
 168 #define in6_ifa_hold(ifp)       atomic_inc(&(ifp)->refcnt)
 169
 170
 171 extern void                     addrconf_forwarding_on(void);
 172 /*
 173  *      Hash function taken from net_alias.c
 174  */
 175
 176 static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
 177 {
 178         __u32 word;
 179
 180         /*
 181          * We perform the hash function over the last 64 bits of the address
 182          * This will include the IEEE address token on links that support it.
 183          */
 184
 185         word = addr->s6_addr32[2] ^ addr->s6_addr32[3];
 186         word ^= (word >> 16);
 187         word ^= (word >> 8);
 188
 189         return ((word ^ (word >> 4)) & 0x0f);
 190 }
 191
 192 /*
 193  *      compute link-local solicited-node multicast address
 194  */
 195
 196 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
 197                                              struct in6_addr *solicited)
 198 {
 199         ipv6_addr_set(solicited,
 200                       __constant_htonl(0xFF020000), 0,
 201                       __constant_htonl(0x1),
 202                       __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
 203 }
 204
 205
 206 static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
 207 {
 208         ipv6_addr_set(addr,
 209                       __constant_htonl(0xFF020000), 0, 0,
 210                       __constant_htonl(0x1));
 211 }
 212
 213 static inline void ipv6_addr_all_routers(struct in6_addr *addr)
 214 {
 215         ipv6_addr_set(addr,
 216                       __constant_htonl(0xFF020000), 0, 0,
 217                       __constant_htonl(0x2));
 218 }
 219
 220 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
 221 {
 222         return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
 223 }
 224
 225 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
 226 {
 227         return (addr->s6_addr32[0] == htonl(0xff020000) &&
 228                 addr->s6_addr32[1] == 0 &&
 229                 addr->s6_addr32[2] == 0 &&
 230                 addr->s6_addr32[3] == htonl(0x00000001));
 231 }
 232
 233 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
 234 {
 235         return (addr->s6_addr32[0] == htonl(0xff020000) &&
 236                 addr->s6_addr32[1] == 0 &&
 237                 addr->s6_addr32[2] == 0 &&
 238                 addr->s6_addr32[3] == htonl(0x00000002));
 239 }
 240
 241 #endif
 242 #endif