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