addrconf.h 6.7 KB

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  1. #ifndef _ADDRCONF_H
  2. #define _ADDRCONF_H
  3. #define RETRANS_TIMER HZ
  4. #define MAX_RTR_SOLICITATIONS 3
  5. #define RTR_SOLICITATION_INTERVAL (4*HZ)
  6. #define MIN_VALID_LIFETIME (2*3600) /* 2 hours */
  7. #define TEMP_VALID_LIFETIME (7*86400)
  8. #define TEMP_PREFERRED_LIFETIME (86400)
  9. #define REGEN_MAX_RETRY (5)
  10. #define MAX_DESYNC_FACTOR (600)
  11. #define ADDR_CHECK_FREQUENCY (120*HZ)
  12. #define IPV6_MAX_ADDRESSES 16
  13. #include <linux/in6.h>
  14. struct prefix_info {
  15. __u8 type;
  16. __u8 length;
  17. __u8 prefix_len;
  18. #if defined(__BIG_ENDIAN_BITFIELD)
  19. __u8 onlink : 1,
  20. autoconf : 1,
  21. reserved : 6;
  22. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  23. __u8 reserved : 6,
  24. autoconf : 1,
  25. onlink : 1;
  26. #else
  27. #error "Please fix <asm/byteorder.h>"
  28. #endif
  29. __be32 valid;
  30. __be32 prefered;
  31. __be32 reserved2;
  32. struct in6_addr prefix;
  33. };
  34. #ifdef __KERNEL__
  35. #include <linux/netdevice.h>
  36. #include <net/if_inet6.h>
  37. #include <net/ipv6.h>
  38. #define IN6_ADDR_HSIZE 16
  39. extern int addrconf_init(void);
  40. extern void addrconf_cleanup(void);
  41. extern int addrconf_add_ifaddr(void __user *arg);
  42. extern int addrconf_del_ifaddr(void __user *arg);
  43. extern int addrconf_set_dstaddr(void __user *arg);
  44. extern int ipv6_chk_addr(struct in6_addr *addr,
  45. struct net_device *dev,
  46. int strict);
  47. #ifdef CONFIG_IPV6_MIP6
  48. extern int ipv6_chk_home_addr(struct in6_addr *addr);
  49. #endif
  50. extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr,
  51. struct net_device *dev,
  52. int strict);
  53. extern int ipv6_get_saddr(struct dst_entry *dst,
  54. struct in6_addr *daddr,
  55. struct in6_addr *saddr);
  56. extern int ipv6_dev_get_saddr(struct net_device *dev,
  57. struct in6_addr *daddr,
  58. struct in6_addr *saddr);
  59. extern int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *);
  60. extern int ipv6_rcv_saddr_equal(const struct sock *sk,
  61. const struct sock *sk2);
  62. extern void addrconf_join_solict(struct net_device *dev,
  63. struct in6_addr *addr);
  64. extern void addrconf_leave_solict(struct inet6_dev *idev,
  65. struct in6_addr *addr);
  66. /*
  67. * multicast prototypes (mcast.c)
  68. */
  69. extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
  70. struct in6_addr *addr);
  71. extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
  72. struct in6_addr *addr);
  73. extern void ipv6_sock_mc_close(struct sock *sk);
  74. extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
  75. struct in6_addr *src_addr);
  76. extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
  77. extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
  78. extern int ipv6_dev_mc_dec(struct net_device *dev, 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_init_dev(struct inet6_dev *idev);
  82. extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
  83. extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
  84. extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
  85. struct in6_addr *src_addr);
  86. extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
  87. extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
  88. extern int ipv6_get_hoplimit(struct net_device *dev);
  89. /*
  90. * anycast prototypes (anycast.c)
  91. */
  92. extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
  93. extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
  94. extern void ipv6_sock_ac_close(struct sock *sk);
  95. extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
  96. extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
  97. extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
  98. extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
  99. /* Device notifier */
  100. extern int register_inet6addr_notifier(struct notifier_block *nb);
  101. extern int unregister_inet6addr_notifier(struct notifier_block *nb);
  102. static inline struct inet6_dev *
  103. __in6_dev_get(struct net_device *dev)
  104. {
  105. return rcu_dereference(dev->ip6_ptr);
  106. }
  107. static inline struct inet6_dev *
  108. in6_dev_get(struct net_device *dev)
  109. {
  110. struct inet6_dev *idev = NULL;
  111. rcu_read_lock();
  112. idev = __in6_dev_get(dev);
  113. if (idev)
  114. atomic_inc(&idev->refcnt);
  115. rcu_read_unlock();
  116. return idev;
  117. }
  118. extern void in6_dev_finish_destroy(struct inet6_dev *idev);
  119. static inline void
  120. in6_dev_put(struct inet6_dev *idev)
  121. {
  122. if (atomic_dec_and_test(&idev->refcnt))
  123. in6_dev_finish_destroy(idev);
  124. }
  125. #define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt)
  126. #define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt)
  127. extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
  128. static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
  129. {
  130. if (atomic_dec_and_test(&ifp->refcnt))
  131. inet6_ifa_finish_destroy(ifp);
  132. }
  133. #define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt)
  134. #define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt)
  135. extern void addrconf_forwarding_on(void);
  136. /*
  137. * Hash function taken from net_alias.c
  138. */
  139. static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
  140. {
  141. __u32 word;
  142. /*
  143. * We perform the hash function over the last 64 bits of the address
  144. * This will include the IEEE address token on links that support it.
  145. */
  146. word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
  147. word ^= (word >> 16);
  148. word ^= (word >> 8);
  149. return ((word ^ (word >> 4)) & 0x0f);
  150. }
  151. /*
  152. * compute link-local solicited-node multicast address
  153. */
  154. static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
  155. struct in6_addr *solicited)
  156. {
  157. ipv6_addr_set(solicited,
  158. __constant_htonl(0xFF020000), 0,
  159. __constant_htonl(0x1),
  160. __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
  161. }
  162. static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
  163. {
  164. ipv6_addr_set(addr,
  165. __constant_htonl(0xFF020000), 0, 0,
  166. __constant_htonl(0x1));
  167. }
  168. static inline void ipv6_addr_all_routers(struct in6_addr *addr)
  169. {
  170. ipv6_addr_set(addr,
  171. __constant_htonl(0xFF020000), 0, 0,
  172. __constant_htonl(0x2));
  173. }
  174. static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
  175. {
  176. return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
  177. }
  178. static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
  179. {
  180. return (addr->s6_addr32[0] == htonl(0xff020000) &&
  181. addr->s6_addr32[1] == 0 &&
  182. addr->s6_addr32[2] == 0 &&
  183. addr->s6_addr32[3] == htonl(0x00000001));
  184. }
  185. static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
  186. {
  187. return (addr->s6_addr32[0] == htonl(0xff020000) &&
  188. addr->s6_addr32[1] == 0 &&
  189. addr->s6_addr32[2] == 0 &&
  190. addr->s6_addr32[3] == htonl(0x00000002));
  191. }
  192. #ifdef CONFIG_PROC_FS
  193. extern int if6_proc_init(void);
  194. extern void if6_proc_exit(void);
  195. #endif
  196. #endif
  197. #endif