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