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 __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 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 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 65 extern int ipv6_chk_home_addr(struct in6_addr *addr); 66 #endif 67 extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, 68 struct net_device *dev, 69 int strict); 70 extern int ipv6_get_saddr(struct dst_entry *dst, 71 struct in6_addr *daddr, 72 struct in6_addr *saddr); 73 extern int ipv6_dev_get_saddr(struct net_device *dev, 74 struct in6_addr *daddr, 75 struct in6_addr *saddr); 76 extern int ipv6_get_lladdr(struct net_device *dev, 77 struct in6_addr *addr, 78 unsigned char banned_flags); 79 extern int ipv6_rcv_saddr_equal(const struct sock *sk, 80 const struct sock *sk2); 81 extern void addrconf_join_solict(struct net_device *dev, 82 struct in6_addr *addr); 83 extern void addrconf_leave_solict(struct inet6_dev *idev, 84 struct in6_addr *addr); 85 86 /* 87 * multicast prototypes (mcast.c) 88 */ 89 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, 90 struct in6_addr *addr); 91 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, 92 struct in6_addr *addr); 93 extern void ipv6_sock_mc_close(struct sock *sk); 94 extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr, 95 struct in6_addr *src_addr); 96 97 extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr); 98 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr); 99 extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr); 100 extern void ipv6_mc_up(struct inet6_dev *idev); 101 extern void ipv6_mc_down(struct inet6_dev *idev); 102 extern void ipv6_mc_init_dev(struct inet6_dev *idev); 103 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); 104 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); 105 106 extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group, 107 struct in6_addr *src_addr); 108 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); 109 110 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); 111 112 extern int ipv6_get_hoplimit(struct net_device *dev); 113 114 /* 115 * anycast prototypes (anycast.c) 116 */ 117 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); 118 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); 119 extern void ipv6_sock_ac_close(struct sock *sk); 120 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); 121 122 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); 123 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); 124 extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr); 125 126 127 /* Device notifier */ 128 extern int register_inet6addr_notifier(struct notifier_block *nb); 129 extern int unregister_inet6addr_notifier(struct notifier_block *nb); 130 131 static inline struct inet6_dev * 132 __in6_dev_get(struct net_device *dev) 133 { 134 return rcu_dereference(dev->ip6_ptr); 135 } 136 137 static inline struct inet6_dev * 138 in6_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 } 148 149 extern void in6_dev_finish_destroy(struct inet6_dev *idev); 150 151 static inline void 152 in6_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) 160 161 162 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); 163 164 static 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) 172 173 174 extern void addrconf_forwarding_on(void); 175 /* 176 * Hash function taken from net_alias.c 177 */ 178 179 static __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 */ 198 199 static 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 } 207 208 209 static 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 } 215 216 static 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 } 222 223 static 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 } 227 228 static 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 } 235 236 static 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 245 extern int if6_proc_init(void); 246 extern void if6_proc_exit(void); 247 #endif 248 249 #endif 250 #endif 251