diff options
Diffstat (limited to 'include/net/addrconf.h')
| -rw-r--r-- | include/net/addrconf.h | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/include/net/addrconf.h b/include/net/addrconf.h new file mode 100644 index 000000000000..7af9a13cb9be --- /dev/null +++ b/include/net/addrconf.h @@ -0,0 +1,240 @@ +#ifndef _ADDRCONF_H +#define _ADDRCONF_H + +#define RETRANS_TIMER HZ + +#define MAX_RTR_SOLICITATIONS 3 +#define RTR_SOLICITATION_INTERVAL (4*HZ) + +#define MIN_VALID_LIFETIME (2*3600) /* 2 hours */ + +#define TEMP_VALID_LIFETIME (7*86400) +#define TEMP_PREFERRED_LIFETIME (86400) +#define REGEN_MAX_RETRY (5) +#define MAX_DESYNC_FACTOR (600) + +#define ADDR_CHECK_FREQUENCY (120*HZ) + +#define IPV6_MAX_ADDRESSES 16 + +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 <asm/byteorder.h>" +#endif + __u32 valid; + __u32 prefered; + __u32 reserved2; + + struct in6_addr prefix; +}; + + +#ifdef __KERNEL__ + +#include <linux/in6.h> +#include <linux/netdevice.h> +#include <net/if_inet6.h> + +#define IN6_ADDR_HSIZE 16 + +extern int addrconf_init(void); +extern void addrconf_cleanup(void); + +extern int addrconf_add_ifaddr(void __user *arg); +extern int addrconf_del_ifaddr(void __user *arg); +extern int addrconf_set_dstaddr(void __user *arg); + +extern int ipv6_chk_addr(struct in6_addr *addr, + struct net_device *dev, + int strict); +extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, + struct net_device *dev, + int strict); +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); +extern int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *); +extern int ipv6_rcv_saddr_equal(const struct sock *sk, + const struct sock *sk2); +extern void addrconf_join_solict(struct net_device *dev, + struct in6_addr *addr); +extern void addrconf_leave_solict(struct inet6_dev *idev, + 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 inet6_dev *idev, 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 int ipv6_is_mld(struct sk_buff *skb, int nexthdr); + +extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); + +extern int ipv6_get_hoplimit(struct net_device *dev); + +/* + * 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 inet6_dev *idev, 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(ifp) atomic_dec(&(ifp)->refcnt) +#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->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_addr32[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 |