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
  75 extern int                      ipv6_chk_prefix(struct in6_addr *addr,
  76                                                 struct net_device *dev);
  77
  78 extern struct inet6_ifaddr      *ipv6_get_ifaddr(struct net *net,
  79                                                  const struct in6_addr *addr,
  80                                                  struct net_device *dev,
  81                                                  int strict);
  82
  83 extern int                      ipv6_dev_get_saddr(struct net_device *dev,
  84                                                const struct in6_addr *daddr,
  85                                                unsigned int srcprefs,
  86                                                struct in6_addr *saddr);
  87 extern int                      ipv6_get_lladdr(struct net_device *dev,
  88                                                 struct in6_addr *addr,
  89                                                 unsigned char banned_flags);
  90 extern int                      ipv6_rcv_saddr_equal(const struct sock *sk,
  91                                                       const struct sock *sk2);
  92 extern void                     addrconf_join_solict(struct net_device *dev,
  93                                         struct in6_addr *addr);
  94 extern void                     addrconf_leave_solict(struct inet6_dev *idev,
  95                                         struct in6_addr *addr);
  96
  97 /*
  98  *      IPv6 Address Label subsystem (addrlabel.c)
  99  */
 100 extern int                      ipv6_addr_label_init(void);
 101 extern void                     ipv6_addr_label_rtnl_register(void);
 102 extern u32                      ipv6_addr_label(const struct in6_addr *addr,
 103                                                 int type, int ifindex);
 104
 105 /*
 106  *      multicast prototypes (mcast.c)
 107  */
 108 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
 109                              const struct in6_addr *addr);
 110 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
 111                              const struct in6_addr *addr);
 112 extern void ipv6_sock_mc_close(struct sock *sk);
 113 extern int inet6_mc_check(struct sock *sk,
 114                           const struct in6_addr *mc_addr,
 115                           const struct in6_addr *src_addr);
 116
 117 extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
 118 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
 119 extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
 120 extern void ipv6_mc_up(struct inet6_dev *idev);
 121 extern void ipv6_mc_down(struct inet6_dev *idev);
 122 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
 123 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
 124 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
 125
 126 extern int ipv6_chk_mcast_addr(struct net_device *dev,
 127                                const struct in6_addr *group,
 128                                const struct in6_addr *src_addr);
 129 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
 130
 131 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
 132
 133 /*
 134  *      anycast prototypes (anycast.c)
 135  */
 136 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
 137 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
 138 extern void ipv6_sock_ac_close(struct sock *sk);
 139 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
 140
 141 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
 142 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
 143 extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
 144                                struct in6_addr *addr);
 145
 146
 147 /* Device notifier */
 148 extern int register_inet6addr_notifier(struct notifier_block *nb);
 149 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
 150
 151 static inline struct inet6_dev *
 152 __in6_dev_get(struct net_device *dev)
 153 {
 154         return rcu_dereference(dev->ip6_ptr);
 155 }
 156
 157 static inline struct inet6_dev *
 158 in6_dev_get(struct net_device *dev)
 159 {
 160         struct inet6_dev *idev = NULL;
 161         rcu_read_lock();
 162         idev = __in6_dev_get(dev);
 163         if (idev)
 164                 atomic_inc(&idev->refcnt);
 165         rcu_read_unlock();
 166         return idev;
 167 }
 168
 169 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
 170
 171 static inline void
 172 in6_dev_put(struct inet6_dev *idev)
 173 {
 174         if (atomic_dec_and_test(&idev->refcnt))
 175                 in6_dev_finish_destroy(idev);
 176 }
 177
 178 #define __in6_dev_put(idev)  atomic_dec(&(idev)->refcnt)
 179 #define in6_dev_hold(idev)   atomic_inc(&(idev)->refcnt)
 180
 181
 182 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
 183
 184 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
 185 {
 186         if (atomic_dec_and_test(&ifp->refcnt))
 187                 inet6_ifa_finish_destroy(ifp);
 188 }
 189
 190 #define __in6_ifa_put(ifp)      atomic_dec(&(ifp)->refcnt)
 191 #define in6_ifa_hold(ifp)       atomic_inc(&(ifp)->refcnt)
 192
 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                       htonl(0xFF020000), 0,
 204                       htonl(0x1),
 205                       htonl(0xFF000000) | addr->s6_addr32[3]);
 206 }
 207
 208 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
 209 {
 210         return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
 211 }
 212
 213 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
 214 {
 215         return (((addr->s6_addr32[0] ^ htonl(0xff020000)) |
 216                 addr->s6_addr32[1] | addr->s6_addr32[2] |
 217                 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0);
 218 }
 219
 220 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
 221 {
 222         return (((addr->s6_addr32[0] ^ htonl(0xff020000)) |
 223                 addr->s6_addr32[1] | addr->s6_addr32[2] |
 224                 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0);
 225 }
 226
 227 extern int __ipv6_isatap_ifid(u8 *eui, __be32 addr);
 228
 229 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
 230 {
 231         return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE));
 232 }
 233
 234 #ifdef CONFIG_PROC_FS
 235 extern int if6_proc_init(void);
 236 extern void if6_proc_exit(void);
 237 #endif
 238
 239 #endif
 240 #endif