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/in.h>
  21 #include <linux/in6.h>
  22
  23 struct prefix_info {
  24         __u8                    type;
  25         __u8                    length;
  26         __u8                    prefix_len;
  27
  28 #if defined(__BIG_ENDIAN_BITFIELD)
  29         __u8                    onlink : 1,
  30                                 autoconf : 1,
  31                                 reserved : 6;
  32 #elif defined(__LITTLE_ENDIAN_BITFIELD)
  33         __u8                    reserved : 6,
  34                                 autoconf : 1,
  35                                 onlink : 1;
  36 #else
  37 #error "Please fix <asm/byteorder.h>"
  38 #endif
  39         __be32                  valid;
  40         __be32                  prefered;
  41         __be32                  reserved2;
  42
  43         struct in6_addr         prefix;
  44 };
  45
  46
  47 #ifdef __KERNEL__
  48
  49 #include <linux/netdevice.h>
  50 #include <net/if_inet6.h>
  51 #include <net/ipv6.h>
  52
  53 #define IN6_ADDR_HSIZE          16
  54
  55 extern int                      addrconf_init(void);
  56 extern void                     addrconf_cleanup(void);
  57
  58 extern int                      addrconf_add_ifaddr(void __user *arg);
  59 extern int                      addrconf_del_ifaddr(void __user *arg);
  60 extern int                      addrconf_set_dstaddr(void __user *arg);
  61
  62 extern int                      ipv6_chk_addr(struct net *net,
  63                                               struct in6_addr *addr,
  64                                               struct net_device *dev,
  65                                               int strict);
  66
  67 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
  68 extern int                      ipv6_chk_home_addr(struct net *net,
  69                                                    struct in6_addr *addr);
  70 #endif
  71 extern struct inet6_ifaddr      *ipv6_get_ifaddr(struct net *net,
  72                                                  struct in6_addr *addr,
  73                                                  struct net_device *dev,
  74                                                  int strict);
  75
  76 extern int                      ipv6_get_saddr(struct dst_entry *dst,
  77                                                struct in6_addr *daddr,
  78                                                struct in6_addr *saddr);
  79 extern int                      ipv6_dev_get_saddr(struct net_device *dev,
  80                                                struct in6_addr *daddr,
  81                                                struct in6_addr *saddr);
  82 extern int                      ipv6_get_lladdr(struct net_device *dev,
  83                                                 struct in6_addr *addr,
  84                                                 unsigned char banned_flags);
  85 extern int                      ipv6_rcv_saddr_equal(const struct sock *sk,
  86                                                       const struct sock *sk2);
  87 extern void                     addrconf_join_solict(struct net_device *dev,
  88                                         struct in6_addr *addr);
  89 extern void                     addrconf_leave_solict(struct inet6_dev *idev,
  90                                         struct in6_addr *addr);
  91
  92 /*
  93  *      IPv6 Address Label subsystem (addrlabel.c)
  94  */
  95 extern int                      ipv6_addr_label_init(void);
  96 extern void                     ipv6_addr_label_rtnl_register(void);
  97 extern u32                      ipv6_addr_label(const struct in6_addr *addr,
  98                                                 int type, int ifindex);
  99
 100 /*
 101  *      multicast prototypes (mcast.c)
 102  */
 103 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
 104                   struct in6_addr *addr);
 105 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
 106                   struct in6_addr *addr);
 107 extern void ipv6_sock_mc_close(struct sock *sk);
 108 extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
 109                 struct in6_addr *src_addr);
 110
 111 extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
 112 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
 113 extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
 114 extern void ipv6_mc_up(struct inet6_dev *idev);
 115 extern void ipv6_mc_down(struct inet6_dev *idev);
 116 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
 117 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
 118 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
 119
 120 extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
 121                 struct in6_addr *src_addr);
 122 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
 123
 124 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
 125
 126 extern int ipv6_get_hoplimit(struct net_device *dev);
 127
 128 /*
 129  *      anycast prototypes (anycast.c)
 130  */
 131 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
 132 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
 133 extern void ipv6_sock_ac_close(struct sock *sk);
 134 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
 135
 136 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
 137 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
 138 extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
 139
 140
 141 /* Device notifier */
 142 extern int register_inet6addr_notifier(struct notifier_block *nb);
 143 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
 144
 145 static inline struct inet6_dev *
 146 __in6_dev_get(struct net_device *dev)
 147 {
 148         return rcu_dereference(dev->ip6_ptr);
 149 }
 150
 151 static inline struct inet6_dev *
 152 in6_dev_get(struct net_device *dev)
 153 {
 154         struct inet6_dev *idev = NULL;
 155         rcu_read_lock();
 156         idev = __in6_dev_get(dev);
 157         if (idev)
 158                 atomic_inc(&idev->refcnt);
 159         rcu_read_unlock();
 160         return idev;
 161 }
 162
 163 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
 164
 165 static inline void
 166 in6_dev_put(struct inet6_dev *idev)
 167 {
 168         if (atomic_dec_and_test(&idev->refcnt))
 169                 in6_dev_finish_destroy(idev);
 170 }
 171
 172 #define __in6_dev_put(idev)  atomic_dec(&(idev)->refcnt)
 173 #define in6_dev_hold(idev)   atomic_inc(&(idev)->refcnt)
 174
 175
 176 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
 177
 178 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
 179 {
 180         if (atomic_dec_and_test(&ifp->refcnt))
 181                 inet6_ifa_finish_destroy(ifp);
 182 }
 183
 184 #define __in6_ifa_put(ifp)      atomic_dec(&(ifp)->refcnt)
 185 #define in6_ifa_hold(ifp)       atomic_inc(&(ifp)->refcnt)
 186
 187
 188 extern void                     addrconf_forwarding_on(void);
 189 /*
 190  *      Hash function taken from net_alias.c
 191  */
 192
 193 static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
 194 {
 195         __u32 word;
 196
 197         /*
 198          * We perform the hash function over the last 64 bits of the address
 199          * This will include the IEEE address token on links that support it.
 200          */
 201
 202         word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
 203         word ^= (word >> 16);
 204         word ^= (word >> 8);
 205
 206         return ((word ^ (word >> 4)) & 0x0f);
 207 }
 208
 209 /*
 210  *      compute link-local solicited-node multicast address
 211  */
 212
 213 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
 214                                              struct in6_addr *solicited)
 215 {
 216         ipv6_addr_set(solicited,
 217                       __constant_htonl(0xFF020000), 0,
 218                       __constant_htonl(0x1),
 219                       __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
 220 }
 221
 222
 223 static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
 224 {
 225         ipv6_addr_set(addr,
 226                       __constant_htonl(0xFF020000), 0, 0,
 227                       __constant_htonl(0x1));
 228 }
 229
 230 static inline void ipv6_addr_all_routers(struct in6_addr *addr)
 231 {
 232         ipv6_addr_set(addr,
 233                       __constant_htonl(0xFF020000), 0, 0,
 234                       __constant_htonl(0x2));
 235 }
 236
 237 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
 238 {
 239         return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
 240 }
 241
 242 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
 243 {
 244         return (addr->s6_addr32[0] == htonl(0xff020000) &&
 245                 addr->s6_addr32[1] == 0 &&
 246                 addr->s6_addr32[2] == 0 &&
 247                 addr->s6_addr32[3] == htonl(0x00000001));
 248 }
 249
 250 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
 251 {
 252         return (addr->s6_addr32[0] == htonl(0xff020000) &&
 253                 addr->s6_addr32[1] == 0 &&
 254                 addr->s6_addr32[2] == 0 &&
 255                 addr->s6_addr32[3] == htonl(0x00000002));
 256 }
 257
 258 static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr)
 259 {
 260         eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
 261                   ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
 262                   ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
 263                   ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
 264                   ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
 265                   ipv4_is_badclass(addr)) ? 0x00 : 0x02;
 266         eui[1] = 0;
 267         eui[2] = 0x5E;
 268         eui[3] = 0xFE;
 269         memcpy (eui+4, &addr, 4);
 270         return 0;
 271 }
 272
 273 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
 274 {
 275         return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE));
 276 }
 277
 278 #ifdef CONFIG_PROC_FS
 279 extern int if6_proc_init(void);
 280 extern void if6_proc_exit(void);
 281 #endif
 282
 283 #endif
 284 #endif