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(struct net *net,
  59                                                     void __user *arg);
  60 extern int                      addrconf_del_ifaddr(struct net *net,
  61                                                     void __user *arg);
  62 extern int                      addrconf_set_dstaddr(struct net *net,
  63                                                      void __user *arg);
  64
  65 extern int                      ipv6_chk_addr(struct net *net,
  66                                               struct in6_addr *addr,
  67                                               struct net_device *dev,
  68                                               int strict);
  69
  70 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
  71 extern int                      ipv6_chk_home_addr(struct net *net,
  72                                                    struct in6_addr *addr);
  73 #endif
  74 extern struct inet6_ifaddr      *ipv6_get_ifaddr(struct net *net,
  75                                                  struct in6_addr *addr,
  76                                                  struct net_device *dev,
  77                                                  int strict);
  78
  79 extern int                      ipv6_dev_get_saddr(struct net_device *dev,
  80                                                struct in6_addr *daddr,
  81                                                unsigned int srcprefs,
  82                                                struct in6_addr *saddr);
  83 extern int                      ipv6_get_lladdr(struct net_device *dev,
  84                                                 struct in6_addr *addr,
  85                                                 unsigned char banned_flags);
  86 extern int                      ipv6_rcv_saddr_equal(const struct sock *sk,
  87                                                       const struct sock *sk2);
  88 extern void                     addrconf_join_solict(struct net_device *dev,
  89                                         struct in6_addr *addr);
  90 extern void                     addrconf_leave_solict(struct inet6_dev *idev,
  91                                         struct in6_addr *addr);
  92
  93 /*
  94  *      IPv6 Address Label subsystem (addrlabel.c)
  95  */
  96 extern int                      ipv6_addr_label_init(void);
  97 extern void                     ipv6_addr_label_rtnl_register(void);
  98 extern u32                      ipv6_addr_label(const struct in6_addr *addr,
  99                                                 int type, int ifindex);
 100
 101 /*
 102  *      multicast prototypes (mcast.c)
 103  */
 104 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
 105                   struct in6_addr *addr);
 106 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
 107                   struct in6_addr *addr);
 108 extern void ipv6_sock_mc_close(struct sock *sk);
 109 extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
 110                 struct in6_addr *src_addr);
 111
 112 extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
 113 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
 114 extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
 115 extern void ipv6_mc_up(struct inet6_dev *idev);
 116 extern void ipv6_mc_down(struct inet6_dev *idev);
 117 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
 118 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
 119 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
 120
 121 extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
 122                 struct in6_addr *src_addr);
 123 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
 124
 125 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
 126
 127 /*
 128  *      anycast prototypes (anycast.c)
 129  */
 130 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
 131 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
 132 extern void ipv6_sock_ac_close(struct sock *sk);
 133 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
 134
 135 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
 136 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
 137 extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
 138                                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                       htonl(0xFF020000), 0,
 218                       htonl(0x1),
 219                       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, htonl(0xFF020000), 0, 0, htonl(0x1));
 226 }
 227
 228 static inline void ipv6_addr_all_routers(struct in6_addr *addr)
 229 {
 230         ipv6_addr_set(addr, htonl(0xFF020000), 0, 0, htonl(0x2));
 231 }
 232
 233 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
 234 {
 235         return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
 236 }
 237
 238 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
 239 {
 240         return (addr->s6_addr32[0] == htonl(0xff020000) &&
 241                 addr->s6_addr32[1] == 0 &&
 242                 addr->s6_addr32[2] == 0 &&
 243                 addr->s6_addr32[3] == htonl(0x00000001));
 244 }
 245
 246 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
 247 {
 248         return (addr->s6_addr32[0] == htonl(0xff020000) &&
 249                 addr->s6_addr32[1] == 0 &&
 250                 addr->s6_addr32[2] == 0 &&
 251                 addr->s6_addr32[3] == htonl(0x00000002));
 252 }
 253
 254 static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr)
 255 {
 256         eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
 257                   ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
 258                   ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
 259                   ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
 260                   ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
 261                   ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
 262         eui[1] = 0;
 263         eui[2] = 0x5E;
 264         eui[3] = 0xFE;
 265         memcpy (eui+4, &addr, 4);
 266         return 0;
 267 }
 268
 269 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
 270 {
 271         return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE));
 272 }
 273
 274 #ifdef CONFIG_PROC_FS
 275 extern int if6_proc_init(void);
 276 extern void if6_proc_exit(void);
 277 #endif
 278
 279 #endif
 280 #endif