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/in.h> 21 #include <linux/in6.h> 22 23 struct prefix_info { 24 __u8 type; 25 __u8 length; 26 __u8 prefix_len; 27 28 #if defined(__BIG_ENDIAN_BITFIELD) 29 __u8 onlink : 1, 30 autoconf : 1, 31 reserved : 6; 32 #elif defined(__LITTLE_ENDIAN_BITFIELD) 33 __u8 reserved : 6, 34 autoconf : 1, 35 onlink : 1; 36 #else 37 #error "Please fix <asm/byteorder.h>" 38 #endif 39 __be32 valid; 40 __be32 prefered; 41 __be32 reserved2; 42 43 struct in6_addr prefix; 44 }; 45 46 47 #ifdef __KERNEL__ 48 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 net *net, 63 struct in6_addr *addr, 64 struct net_device *dev, 65 int strict); 66 67 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 68 extern int ipv6_chk_home_addr(struct net *net, 69 struct in6_addr *addr); 70 #endif 71 extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, 72 struct in6_addr *addr, 73 struct net_device *dev, 74 int strict); 75 76 extern int ipv6_get_saddr(struct dst_entry *dst, 77 struct in6_addr *daddr, 78 struct in6_addr *saddr); 79 extern int ipv6_dev_get_saddr(struct net_device *dev, 80 struct in6_addr *daddr, 81 struct in6_addr *saddr); 82 extern int ipv6_get_lladdr(struct net_device *dev, 83 struct in6_addr *addr, 84 unsigned char banned_flags); 85 extern int ipv6_rcv_saddr_equal(const struct sock *sk, 86 const struct sock *sk2); 87 extern void addrconf_join_solict(struct net_device *dev, 88 struct in6_addr *addr); 89 extern void addrconf_leave_solict(struct inet6_dev *idev, 90 struct in6_addr *addr); 91 92 /* 93 * IPv6 Address Label subsystem (addrlabel.c) 94 */ 95 extern int ipv6_addr_label_init(void); 96 extern void ipv6_addr_label_rtnl_register(void); 97 extern u32 ipv6_addr_label(const struct in6_addr *addr, 98 int type, int ifindex); 99 100 /* 101 * multicast prototypes (mcast.c) 102 */ 103 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, 104 struct in6_addr *addr); 105 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, 106 struct in6_addr *addr); 107 extern void ipv6_sock_mc_close(struct sock *sk); 108 extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr, 109 struct in6_addr *src_addr); 110 111 extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr); 112 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr); 113 extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr); 114 extern void ipv6_mc_up(struct inet6_dev *idev); 115 extern void ipv6_mc_down(struct inet6_dev *idev); 116 extern void ipv6_mc_init_dev(struct inet6_dev *idev); 117 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); 118 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); 119 120 extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group, 121 struct in6_addr *src_addr); 122 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); 123 124 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); 125 126 extern int ipv6_get_hoplimit(struct net_device *dev); 127 128 /* 129 * anycast prototypes (anycast.c) 130 */ 131 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); 132 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); 133 extern void ipv6_sock_ac_close(struct sock *sk); 134 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); 135 136 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); 137 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); 138 extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr); 139 140 141 /* Device notifier */ 142 extern int register_inet6addr_notifier(struct notifier_block *nb); 143 extern int unregister_inet6addr_notifier(struct notifier_block *nb); 144 145 static inline struct inet6_dev * 146 __in6_dev_get(struct net_device *dev) 147 { 148 return rcu_dereference(dev->ip6_ptr); 149 } 150 151 static inline struct inet6_dev * 152 in6_dev_get(struct net_device *dev) 153 { 154 struct inet6_dev *idev = NULL; 155 rcu_read_lock(); 156 idev = __in6_dev_get(dev); 157 if (idev) 158 atomic_inc(&idev->refcnt); 159 rcu_read_unlock(); 160 return idev; 161 } 162 163 extern void in6_dev_finish_destroy(struct inet6_dev *idev); 164 165 static inline void 166 in6_dev_put(struct inet6_dev *idev) 167 { 168 if (atomic_dec_and_test(&idev->refcnt)) 169 in6_dev_finish_destroy(idev); 170 } 171 172 #define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt) 173 #define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt) 174 175 176 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); 177 178 static inline void in6_ifa_put(struct inet6_ifaddr *ifp) 179 { 180 if (atomic_dec_and_test(&ifp->refcnt)) 181 inet6_ifa_finish_destroy(ifp); 182 } 183 184 #define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt) 185 #define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt) 186 187 188 extern void addrconf_forwarding_on(void); 189 /* 190 * Hash function taken from net_alias.c 191 */ 192 193 static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr) 194 { 195 __u32 word; 196 197 /* 198 * We perform the hash function over the last 64 bits of the address 199 * This will include the IEEE address token on links that support it. 200 */ 201 202 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]); 203 word ^= (word >> 16); 204 word ^= (word >> 8); 205 206 return ((word ^ (word >> 4)) & 0x0f); 207 } 208 209 /* 210 * compute link-local solicited-node multicast address 211 */ 212 213 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, 214 struct in6_addr *solicited) 215 { 216 ipv6_addr_set(solicited, 217 __constant_htonl(0xFF020000), 0, 218 __constant_htonl(0x1), 219 __constant_htonl(0xFF000000) | addr->s6_addr32[3]); 220 } 221 222 223 static inline void ipv6_addr_all_nodes(struct in6_addr *addr) 224 { 225 ipv6_addr_set(addr, 226 __constant_htonl(0xFF020000), 0, 0, 227 __constant_htonl(0x1)); 228 } 229 230 static inline void ipv6_addr_all_routers(struct in6_addr *addr) 231 { 232 ipv6_addr_set(addr, 233 __constant_htonl(0xFF020000), 0, 0, 234 __constant_htonl(0x2)); 235 } 236 237 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) 238 { 239 return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000); 240 } 241 242 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) 243 { 244 return (addr->s6_addr32[0] == htonl(0xff020000) && 245 addr->s6_addr32[1] == 0 && 246 addr->s6_addr32[2] == 0 && 247 addr->s6_addr32[3] == htonl(0x00000001)); 248 } 249 250 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) 251 { 252 return (addr->s6_addr32[0] == htonl(0xff020000) && 253 addr->s6_addr32[1] == 0 && 254 addr->s6_addr32[2] == 0 && 255 addr->s6_addr32[3] == htonl(0x00000002)); 256 } 257 258 static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr) 259 { 260 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || 261 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || 262 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || 263 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || 264 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || 265 ipv4_is_lbcast(addr)) ? 0x00 : 0x02; 266 eui[1] = 0; 267 eui[2] = 0x5E; 268 eui[3] = 0xFE; 269 memcpy (eui+4, &addr, 4); 270 return 0; 271 } 272 273 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) 274 { 275 return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE)); 276 } 277 278 #ifdef CONFIG_PROC_FS 279 extern int if6_proc_init(void); 280 extern void if6_proc_exit(void); 281 #endif 282 283 #endif 284 #endif 285