i386/linux/linux-2.3.21/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 ADDR_CHECK_FREQUENCY            (120*HZ)
  10
  11 struct prefix_info {
  12         __u8                    type;
  13         __u8                    length;
  14         __u8                    prefix_len;
  15
  16 #if defined(__BIG_ENDIAN_BITFIELD)
  17         __u8                    onlink : 1,
  18                                 autoconf : 1,
  19                                 reserved : 6;
  20 #elif defined(__LITTLE_ENDIAN_BITFIELD)
  21         __u8                    reserved : 6,
  22                                 autoconf : 1,
  23                                 onlink : 1;
  24 #else
  25 #error "Please fix <asm/byteorder.h>"
  26 #endif
  27         __u32                   valid;
  28         __u32                   prefered;
  29         __u32                   reserved2;
  30
  31         struct in6_addr         prefix;
  32 };
  33
  34
  35 #ifdef __KERNEL__
  36
  37 #include <linux/in6.h>
  38 #include <linux/netdevice.h>
  39 #include <net/if_inet6.h>
  40
  41 #define IN6_ADDR_HSIZE          16
  42
  43 extern void                     addrconf_init(void);
  44 extern void                     addrconf_cleanup(void);
  45
  46 extern int                      addrconf_notify(struct notifier_block *this,
  47                                                 unsigned long event,
  48                                                 void * data);
  49
  50 extern int                      addrconf_add_ifaddr(void *arg);
  51 extern int                      addrconf_del_ifaddr(void *arg);
  52 extern int                      addrconf_set_dstaddr(void *arg);
  53
  54 extern int                      ipv6_chk_addr(struct in6_addr *addr,
  55                                               struct net_device *dev);
  56 extern struct inet6_ifaddr *    ipv6_get_ifaddr(struct in6_addr *addr,
  57                                                 struct net_device *dev);
  58 extern int                      ipv6_get_saddr(struct dst_entry *dst,
  59                                                struct in6_addr *daddr,
  60                                                struct in6_addr *saddr);
  61 extern int                      ipv6_get_lladdr(struct net_device *dev, struct in6_addr *);
  62
  63 /*
  64  *      multicast prototypes (mcast.c)
  65  */
  66 extern int                      ipv6_sock_mc_join(struct sock *sk,
  67                                                   int ifindex,
  68                                                   struct in6_addr *addr);
  69 extern int                      ipv6_sock_mc_drop(struct sock *sk,
  70                                                   int ifindex,
  71                                                   struct in6_addr *addr);
  72 extern void                     ipv6_sock_mc_close(struct sock *sk);
  73 extern int                      inet6_mc_check(struct sock *sk, struct in6_addr *addr);
  74
  75 extern int                      ipv6_dev_mc_inc(struct net_device *dev,
  76                                                 struct in6_addr *addr);
  77 extern int                      ipv6_dev_mc_dec(struct net_device *dev,
  78                                                 struct in6_addr *addr);
  79 extern void                     ipv6_mc_up(struct inet6_dev *idev);
  80 extern void                     ipv6_mc_down(struct inet6_dev *idev);
  81 extern void                     ipv6_mc_destroy_dev(struct inet6_dev *idev);
  82 extern void                     addrconf_dad_failure(struct inet6_ifaddr *ifp);
  83
  84 extern int                      ipv6_chk_mcast_addr(struct net_device *dev,
  85                                                     struct in6_addr *addr);
  86
  87 extern void                     addrconf_prefix_rcv(struct net_device *dev,
  88                                                     u8 *opt, int len);
  89
  90 extern __inline__ struct inet6_dev *
  91 __in6_dev_get(struct net_device *dev)
  92 {
  93         return (struct inet6_dev *)dev->ip6_ptr;
  94 }
  95
  96 extern rwlock_t addrconf_lock;
  97
  98 extern __inline__ struct inet6_dev *
  99 in6_dev_get(struct net_device *dev)
 100 {
 101         struct inet6_dev *idev = NULL;
 102         read_lock(&addrconf_lock);
 103         idev = dev->ip6_ptr;
 104         if (idev)
 105                 atomic_inc(&idev->refcnt);
 106         read_unlock(&addrconf_lock);
 107         return idev;
 108 }
 109
 110 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
 111
 112 extern __inline__ void
 113 in6_dev_put(struct inet6_dev *idev)
 114 {
 115         if (atomic_dec_and_test(&idev->refcnt))
 116                 in6_dev_finish_destroy(idev);
 117 }
 118
 119 #define __in6_dev_put(idev)  atomic_dec(&(idev)->refcnt)
 120 #define in6_dev_hold(idev)   atomic_inc(&(idev)->refcnt)
 121
 122
 123 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
 124
 125 extern __inline__ void in6_ifa_put(struct inet6_ifaddr *ifp)
 126 {
 127         if (atomic_dec_and_test(&ifp->refcnt))
 128                 inet6_ifa_finish_destroy(ifp);
 129 }
 130
 131 #define __in6_ifa_put(idev)  atomic_dec(&(idev)->refcnt)
 132 #define in6_ifa_hold(idev)   atomic_inc(&(idev)->refcnt)
 133
 134
 135 extern void                     addrconf_forwarding_on(void);
 136 /*
 137  *      Hash function taken from net_alias.c
 138  */
 139
 140 static __inline__ u8 ipv6_addr_hash(struct in6_addr *addr)
 141 {
 142         __u32 word;
 143
 144         /*
 145          * We perform the hash function over the last 64 bits of the address
 146          * This will include the IEEE address token on links that support it.
 147          */
 148
 149         word = addr->s6_addr[2] ^ addr->s6_addr32[3];
 150         word  ^= (word>>16);
 151         word ^= (word >> 8);
 152
 153         return ((word ^ (word >> 4)) & 0x0f);
 154 }
 155
 156 /*
 157  *      compute link-local solicited-node multicast address
 158  */
 159
 160 extern __inline__ void addrconf_addr_solict_mult_old(struct in6_addr *addr,
 161                                                      struct in6_addr *solicited)
 162 {
 163         ipv6_addr_set(solicited,
 164                       __constant_htonl(0xFF020000), 0,
 165                       __constant_htonl(0x1), addr->s6_addr32[3]);
 166 }
 167
 168 extern __inline__ void addrconf_addr_solict_mult_new(struct in6_addr *addr,
 169                                                      struct in6_addr *solicited)
 170 {
 171         ipv6_addr_set(solicited,
 172                       __constant_htonl(0xFF020000), 0,
 173                       __constant_htonl(0x1),
 174                       __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
 175 }
 176
 177
 178 extern __inline__ void ipv6_addr_all_nodes(struct in6_addr *addr)
 179 {
 180         ipv6_addr_set(addr,
 181                       __constant_htonl(0xFF020000), 0, 0,
 182                       __constant_htonl(0x1));
 183 }
 184
 185 extern __inline__ void ipv6_addr_all_routers(struct in6_addr *addr)
 186 {
 187         ipv6_addr_set(addr,
 188                       __constant_htonl(0xFF020000), 0, 0,
 189                       __constant_htonl(0x2));
 190 }
 191
 192 extern __inline__ int ipv6_addr_is_multicast(struct in6_addr *addr)
 193 {
 194         return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
 195 }
 196
 197 #endif
 198 #endif