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/in6.h> 21 22struct prefix_info { 23 __u8 type; 24 __u8 length; 25 __u8 prefix_len; 26 27#if defined(__BIG_ENDIAN_BITFIELD) 28 __u8 onlink : 1, 29 autoconf : 1, 30 reserved : 6; 31#elif defined(__LITTLE_ENDIAN_BITFIELD) 32 __u8 reserved : 6, 33 autoconf : 1, 34 onlink : 1; 35#else 36#error "Please fix <asm/byteorder.h>" 37#endif 38 __be32 valid; 39 __be32 prefered; 40 __be32 reserved2; 41 42 struct in6_addr prefix; 43}; 44 45 46#ifdef __KERNEL__ 47 48#include <linux/netdevice.h> 49#include <net/if_inet6.h> 50#include <net/ipv6.h> 51 52#define IN6_ADDR_HSIZE 16 53 54extern int addrconf_init(void); 55extern void addrconf_cleanup(void); 56 57extern int addrconf_add_ifaddr(void __user *arg); 58extern int addrconf_del_ifaddr(void __user *arg); 59extern int addrconf_set_dstaddr(void __user *arg); 60 61extern int ipv6_chk_addr(struct in6_addr *addr, 62 struct net_device *dev, 63 int strict); 64#ifdef CONFIG_IPV6_MIP6 65extern int ipv6_chk_home_addr(struct in6_addr *addr); 66#endif 67extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, 68 struct net_device *dev, 69 int strict); 70extern int ipv6_get_saddr(struct dst_entry *dst, 71 struct in6_addr *daddr, 72 struct in6_addr *saddr); 73extern int ipv6_dev_get_saddr(struct net_device *dev, 74 struct in6_addr *daddr, 75 struct in6_addr *saddr); 76extern int ipv6_get_lladdr(struct net_device *dev, 77 struct in6_addr *addr, 78 unsigned char banned_flags); 79extern int ipv6_rcv_saddr_equal(const struct sock *sk, 80 const struct sock *sk2); 81extern void addrconf_join_solict(struct net_device *dev, 82 struct in6_addr *addr); 83extern void addrconf_leave_solict(struct inet6_dev *idev, 84 struct in6_addr *addr); 85 86/* 87 * multicast prototypes (mcast.c) 88 */ 89extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, 90 struct in6_addr *addr); 91extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, 92 struct in6_addr *addr); 93extern void ipv6_sock_mc_close(struct sock *sk); 94extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr, 95 struct in6_addr *src_addr); 96 97extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr); 98extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr); 99extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr); 100extern void ipv6_mc_up(struct inet6_dev *idev); 101extern void ipv6_mc_down(struct inet6_dev *idev); 102extern void ipv6_mc_init_dev(struct inet6_dev *idev); 103extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); 104extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); 105 106extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group, 107 struct in6_addr *src_addr); 108extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); 109 110extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); 111 112extern int ipv6_get_hoplimit(struct net_device *dev); 113 114/* 115 * anycast prototypes (anycast.c) 116 */ 117extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); 118extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); 119extern void ipv6_sock_ac_close(struct sock *sk); 120extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); 121 122extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); 123extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); 124extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr); 125 126 127/* Device notifier */ 128extern int register_inet6addr_notifier(struct notifier_block *nb); 129extern int unregister_inet6addr_notifier(struct notifier_block *nb); 130 131static inline struct inet6_dev * 132__in6_dev_get(struct net_device *dev) 133{ 134 return rcu_dereference(dev->ip6_ptr); 135} 136 137static inline struct inet6_dev * 138in6_dev_get(struct net_device *dev) 139{ 140 struct inet6_dev *idev = NULL; 141 rcu_read_lock(); 142 idev = __in6_dev_get(dev); 143 if (idev) 144 atomic_inc(&idev->refcnt); 145 rcu_read_unlock(); 146 return idev; 147} 148 149extern void in6_dev_finish_destroy(struct inet6_dev *idev); 150 151static inline void 152in6_dev_put(struct inet6_dev *idev) 153{ 154 if (atomic_dec_and_test(&idev->refcnt)) 155 in6_dev_finish_destroy(idev); 156} 157 158#define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt) 159#define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt) 160 161 162extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); 163 164static inline void in6_ifa_put(struct inet6_ifaddr *ifp) 165{ 166 if (atomic_dec_and_test(&ifp->refcnt)) 167 inet6_ifa_finish_destroy(ifp); 168} 169 170#define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt) 171#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt) 172 173 174extern void addrconf_forwarding_on(void); 175/* 176 * Hash function taken from net_alias.c 177 */ 178 179static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr) 180{ 181 __u32 word; 182 183 /* 184 * We perform the hash function over the last 64 bits of the address 185 * This will include the IEEE address token on links that support it. 186 */ 187 188 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]); 189 word ^= (word >> 16); 190 word ^= (word >> 8); 191 192 return ((word ^ (word >> 4)) & 0x0f); 193} 194 195/* 196 * compute link-local solicited-node multicast address 197 */ 198 199static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, 200 struct in6_addr *solicited) 201{ 202 ipv6_addr_set(solicited, 203 __constant_htonl(0xFF020000), 0, 204 __constant_htonl(0x1), 205 __constant_htonl(0xFF000000) | addr->s6_addr32[3]); 206} 207 208 209static inline void ipv6_addr_all_nodes(struct in6_addr *addr) 210{ 211 ipv6_addr_set(addr, 212 __constant_htonl(0xFF020000), 0, 0, 213 __constant_htonl(0x1)); 214} 215 216static inline void ipv6_addr_all_routers(struct in6_addr *addr) 217{ 218 ipv6_addr_set(addr, 219 __constant_htonl(0xFF020000), 0, 0, 220 __constant_htonl(0x2)); 221} 222 223static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) 224{ 225 return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000); 226} 227 228static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) 229{ 230 return (addr->s6_addr32[0] == htonl(0xff020000) && 231 addr->s6_addr32[1] == 0 && 232 addr->s6_addr32[2] == 0 && 233 addr->s6_addr32[3] == htonl(0x00000001)); 234} 235 236static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) 237{ 238 return (addr->s6_addr32[0] == htonl(0xff020000) && 239 addr->s6_addr32[1] == 0 && 240 addr->s6_addr32[2] == 0 && 241 addr->s6_addr32[3] == htonl(0x00000002)); 242} 243 244#ifdef CONFIG_PROC_FS 245extern int if6_proc_init(void); 246extern void if6_proc_exit(void); 247#endif 248 249#endif 250#endif 251