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