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         __be32                  valid;
  39         __be32                  prefered;
  40         __be32                  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 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
  65 extern int                      ipv6_chk_home_addr(struct in6_addr *addr);
  66 #endif
  67 extern struct inet6_ifaddr *    ipv6_get_ifaddr(struct in6_addr *addr,
  68                                                 struct net_device *dev,
  69                                                 int strict);
  70 extern int                      ipv6_get_saddr(struct dst_entry *dst,
  71                                                struct in6_addr *daddr,
  72                                                struct in6_addr *saddr);
  73 extern int                      ipv6_dev_get_saddr(struct net_device *dev,
  74                                                struct in6_addr *daddr,
  75                                                struct in6_addr *saddr);
  76 extern int                      ipv6_get_lladdr(struct net_device *dev,
  77                                                 struct in6_addr *addr,
  78                                                 unsigned char banned_flags);
  79 extern int                      ipv6_rcv_saddr_equal(const struct sock *sk,
  80                                                       const struct sock *sk2);
  81 extern void                     addrconf_join_solict(struct net_device *dev,
  82                                         struct in6_addr *addr);
  83 extern void                     addrconf_leave_solict(struct inet6_dev *idev,
  84                                         struct in6_addr *addr);
  85
  86 /*
  87  *      IPv6 Address Label subsystem (addrlabel.c)
  88  */
  89 extern int                      ipv6_addr_label_init(void);
  90 extern void                     ipv6_addr_label_rtnl_register(void);
  91 extern u32                      ipv6_addr_label(const struct in6_addr *addr,
  92                                                 int type, int ifindex);
  93
  94 /*
  95  *      multicast prototypes (mcast.c)
  96  */
  97 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
  98                   struct in6_addr *addr);
  99 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
 100                   struct in6_addr *addr);
 101 extern void ipv6_sock_mc_close(struct sock *sk);
 102 extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
 103                 struct in6_addr *src_addr);
 104
 105 extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
 106 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
 107 extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
 108 extern void ipv6_mc_up(struct inet6_dev *idev);
 109 extern void ipv6_mc_down(struct inet6_dev *idev);
 110 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
 111 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
 112 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
 113
 114 extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
 115                 struct in6_addr *src_addr);
 116 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
 117
 118 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
 119
 120 extern int ipv6_get_hoplimit(struct net_device *dev);
 121
 122 /*
 123  *      anycast prototypes (anycast.c)
 124  */
 125 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
 126 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
 127 extern void ipv6_sock_ac_close(struct sock *sk);
 128 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
 129
 130 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
 131 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
 132 extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
 133
 134
 135 /* Device notifier */
 136 extern int register_inet6addr_notifier(struct notifier_block *nb);
 137 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
 138
 139 static inline struct inet6_dev *
 140 __in6_dev_get(struct net_device *dev)
 141 {
 142         return rcu_dereference(dev->ip6_ptr);
 143 }
 144
 145 static inline struct inet6_dev *
 146 in6_dev_get(struct net_device *dev)
 147 {
 148         struct inet6_dev *idev = NULL;
 149         rcu_read_lock();
 150         idev = __in6_dev_get(dev);
 151         if (idev)
 152                 atomic_inc(&idev->refcnt);
 153         rcu_read_unlock();
 154         return idev;
 155 }
 156
 157 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
 158
 159 static inline void
 160 in6_dev_put(struct inet6_dev *idev)
 161 {
 162         if (atomic_dec_and_test(&idev->refcnt))
 163                 in6_dev_finish_destroy(idev);
 164 }
 165
 166 #define __in6_dev_put(idev)  atomic_dec(&(idev)->refcnt)
 167 #define in6_dev_hold(idev)   atomic_inc(&(idev)->refcnt)
 168
 169
 170 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
 171
 172 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
 173 {
 174         if (atomic_dec_and_test(&ifp->refcnt))
 175                 inet6_ifa_finish_destroy(ifp);
 176 }
 177
 178 #define __in6_ifa_put(ifp)      atomic_dec(&(ifp)->refcnt)
 179 #define in6_ifa_hold(ifp)       atomic_inc(&(ifp)->refcnt)
 180
 181
 182 extern void                     addrconf_forwarding_on(void);
 183 /*
 184  *      Hash function taken from net_alias.c
 185  */
 186
 187 static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
 188 {
 189         __u32 word;
 190
 191         /*
 192          * We perform the hash function over the last 64 bits of the address
 193          * This will include the IEEE address token on links that support it.
 194          */
 195
 196         word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
 197         word ^= (word >> 16);
 198         word ^= (word >> 8);
 199
 200         return ((word ^ (word >> 4)) & 0x0f);
 201 }
 202
 203 /*
 204  *      compute link-local solicited-node multicast address
 205  */
 206
 207 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
 208                                              struct in6_addr *solicited)
 209 {
 210         ipv6_addr_set(solicited,
 211                       __constant_htonl(0xFF020000), 0,
 212                       __constant_htonl(0x1),
 213                       __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
 214 }
 215
 216
 217 static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
 218 {
 219         ipv6_addr_set(addr,
 220                       __constant_htonl(0xFF020000), 0, 0,
 221                       __constant_htonl(0x1));
 222 }
 223
 224 static inline void ipv6_addr_all_routers(struct in6_addr *addr)
 225 {
 226         ipv6_addr_set(addr,
 227                       __constant_htonl(0xFF020000), 0, 0,
 228                       __constant_htonl(0x2));
 229 }
 230
 231 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
 232 {
 233         return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
 234 }
 235
 236 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
 237 {
 238         return (addr->s6_addr32[0] == htonl(0xff020000) &&
 239                 addr->s6_addr32[1] == 0 &&
 240                 addr->s6_addr32[2] == 0 &&
 241                 addr->s6_addr32[3] == htonl(0x00000001));
 242 }
 243
 244 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
 245 {
 246         return (addr->s6_addr32[0] == htonl(0xff020000) &&
 247                 addr->s6_addr32[1] == 0 &&
 248                 addr->s6_addr32[2] == 0 &&
 249                 addr->s6_addr32[3] == htonl(0x00000002));
 250 }
 251
 252 #ifdef CONFIG_PROC_FS
 253 extern int if6_proc_init(void);
 254 extern void if6_proc_exit(void);
 255 #endif
 256
 257 #endif
 258 #endif