#ifndef _ADDRCONF_H #define _ADDRCONF_H #define RETRANS_TIMER HZ #define MAX_RTR_SOLICITATIONS 3 #define RTR_SOLICITATION_INTERVAL (4*HZ) #define ADDR_CHECK_FREQUENCY (120*HZ) struct prefix_info { __u8 type; __u8 length; __u8 prefix_len; #if defined(__BIG_ENDIAN_BITFIELD) __u8 onlink : 1, autoconf : 1, reserved : 6; #elif defined(__LITTLE_ENDIAN_BITFIELD) __u8 reserved : 6, autoconf : 1, onlink : 1; #else #error "Please fix " #endif __u32 valid; __u32 prefered; __u32 reserved2; struct in6_addr prefix; }; #ifdef __KERNEL__ #include #include #include #define IN6_ADDR_HSIZE 16 extern void addrconf_init(void); extern void addrconf_cleanup(void); extern int addrconf_notify(struct notifier_block *this, unsigned long event, void * data); extern int addrconf_add_ifaddr(void *arg); extern int addrconf_del_ifaddr(void *arg); extern int addrconf_set_dstaddr(void *arg); extern int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev); extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev); extern int ipv6_get_saddr(struct dst_entry *dst, struct in6_addr *daddr, struct in6_addr *saddr); extern int ipv6_dev_get_saddr(struct net_device *dev, struct in6_addr *daddr, struct in6_addr *saddr, int onlink); extern int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *); extern void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr); extern void addrconf_leave_solict(struct net_device *dev, struct in6_addr *addr); /* * multicast prototypes (mcast.c) */ extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr); extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr); extern void ipv6_sock_mc_close(struct sock *sk); extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr, struct in6_addr *src_addr); extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr); extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr); extern void ipv6_mc_up(struct inet6_dev *idev); extern void ipv6_mc_down(struct inet6_dev *idev); extern void ipv6_mc_init_dev(struct inet6_dev *idev); extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group, struct in6_addr *src_addr); extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); /* * anycast prototypes (anycast.c) */ extern int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr); extern int ipv6_sock_ac_drop(struct sock *sk, int ifindex, struct in6_addr *addr); extern void ipv6_sock_ac_close(struct sock *sk); extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); extern int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *addr); extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr); /* Device notifier */ extern int register_inet6addr_notifier(struct notifier_block *nb); extern int unregister_inet6addr_notifier(struct notifier_block *nb); static inline struct inet6_dev * __in6_dev_get(struct net_device *dev) { return (struct inet6_dev *)dev->ip6_ptr; } extern rwlock_t addrconf_lock; static inline struct inet6_dev * in6_dev_get(struct net_device *dev) { struct inet6_dev *idev = NULL; read_lock(&addrconf_lock); idev = dev->ip6_ptr; if (idev) atomic_inc(&idev->refcnt); read_unlock(&addrconf_lock); return idev; } extern void in6_dev_finish_destroy(struct inet6_dev *idev); static inline void in6_dev_put(struct inet6_dev *idev) { if (atomic_dec_and_test(&idev->refcnt)) in6_dev_finish_destroy(idev); } #define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt) #define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt) extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); static inline void in6_ifa_put(struct inet6_ifaddr *ifp) { if (atomic_dec_and_test(&ifp->refcnt)) inet6_ifa_finish_destroy(ifp); } #define __in6_ifa_put(idev) atomic_dec(&(idev)->refcnt) #define in6_ifa_hold(idev) atomic_inc(&(idev)->refcnt) extern void addrconf_forwarding_on(void); /* * Hash function taken from net_alias.c */ static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr) { __u32 word; /* * We perform the hash function over the last 64 bits of the address * This will include the IEEE address token on links that support it. */ word = addr->s6_addr[2] ^ addr->s6_addr32[3]; word ^= (word>>16); word ^= (word >> 8); return ((word ^ (word >> 4)) & 0x0f); } /* * compute link-local solicited-node multicast address */ static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, struct in6_addr *solicited) { ipv6_addr_set(solicited, __constant_htonl(0xFF020000), 0, __constant_htonl(0x1), __constant_htonl(0xFF000000) | addr->s6_addr32[3]); } static inline void ipv6_addr_all_nodes(struct in6_addr *addr) { ipv6_addr_set(addr, __constant_htonl(0xFF020000), 0, 0, __constant_htonl(0x1)); } static inline void ipv6_addr_all_routers(struct in6_addr *addr) { ipv6_addr_set(addr, __constant_htonl(0xFF020000), 0, 0, __constant_htonl(0x2)); } static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) { return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000); } static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) { return (addr->s6_addr32[0] == htonl(0xff020000) && addr->s6_addr32[1] == 0 && addr->s6_addr32[2] == 0 && addr->s6_addr32[3] == htonl(0x00000001)); } static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) { return (addr->s6_addr32[0] == htonl(0xff020000) && addr->s6_addr32[1] == 0 && addr->s6_addr32[2] == 0 && addr->s6_addr32[3] == htonl(0x00000002)); } #endif #endif