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 in6_addr *addr); 69 #endif 70 extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, 71 struct in6_addr *addr, 72 struct net_device *dev, 73 int strict); 74 75 extern int ipv6_get_saddr(struct dst_entry *dst, 76 struct in6_addr *daddr, 77 struct in6_addr *saddr); 78 extern int ipv6_dev_get_saddr(struct net_device *dev, 79 struct in6_addr *daddr, 80 struct in6_addr *saddr); 81 extern int ipv6_get_lladdr(struct net_device *dev, 82 struct in6_addr *addr, 83 unsigned char banned_flags); 84 extern int ipv6_rcv_saddr_equal(const struct sock *sk, 85 const struct sock *sk2); 86 extern void addrconf_join_solict(struct net_device *dev, 87 struct in6_addr *addr); 88 extern void addrconf_leave_solict(struct inet6_dev *idev, 89 struct in6_addr *addr); 90 91 /* 92 * IPv6 Address Label subsystem (addrlabel.c) 93 */ 94 extern int ipv6_addr_label_init(void); 95 extern void ipv6_addr_label_rtnl_register(void); 96 extern u32 ipv6_addr_label(const struct in6_addr *addr, 97 int type, int ifindex); 98 99 /* 100 * multicast prototypes (mcast.c) 101 */ 102 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, 103 struct in6_addr *addr); 104 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, 105 struct in6_addr *addr); 106 extern void ipv6_sock_mc_close(struct sock *sk); 107 extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr, 108 struct in6_addr *src_addr); 109 110 extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr); 111 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr); 112 extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr); 113 extern void ipv6_mc_up(struct inet6_dev *idev); 114 extern void ipv6_mc_down(struct inet6_dev *idev); 115 extern void ipv6_mc_init_dev(struct inet6_dev *idev); 116 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); 117 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); 118 119 extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group, 120 struct in6_addr *src_addr); 121 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); 122 123 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); 124 125 extern int ipv6_get_hoplimit(struct net_device *dev); 126 127 /* 128 * anycast prototypes (anycast.c) 129 */ 130 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); 131 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); 132 extern void ipv6_sock_ac_close(struct sock *sk); 133 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); 134 135 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); 136 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); 137 extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr); 138 139 140 /* Device notifier */ 141 extern int register_inet6addr_notifier(struct notifier_block *nb); 142 extern int unregister_inet6addr_notifier(struct notifier_block *nb); 143 144 static inline struct inet6_dev * 145 __in6_dev_get(struct net_device *dev) 146 { 147 return rcu_dereference(dev->ip6_ptr); 148 } 149 150 static inline struct inet6_dev * 151 in6_dev_get(struct net_device *dev) 152 { 153 struct inet6_dev *idev = NULL; 154 rcu_read_lock(); 155 idev = __in6_dev_get(dev); 156 if (idev) 157 atomic_inc(&idev->refcnt); 158 rcu_read_unlock(); 159 return idev; 160 } 161 162 extern void in6_dev_finish_destroy(struct inet6_dev *idev); 163 164 static inline void 165 in6_dev_put(struct inet6_dev *idev) 166 { 167 if (atomic_dec_and_test(&idev->refcnt)) 168 in6_dev_finish_destroy(idev); 169 } 170 171 #define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt) 172 #define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt) 173 174 175 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); 176 177 static inline void in6_ifa_put(struct inet6_ifaddr *ifp) 178 { 179 if (atomic_dec_and_test(&ifp->refcnt)) 180 inet6_ifa_finish_destroy(ifp); 181 } 182 183 #define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt) 184 #define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt) 185 186 187 extern void addrconf_forwarding_on(void); 188 /* 189 * Hash function taken from net_alias.c 190 */ 191 192 static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr) 193 { 194 __u32 word; 195 196 /* 197 * We perform the hash function over the last 64 bits of the address 198 * This will include the IEEE address token on links that support it. 199 */ 200 201 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]); 202 word ^= (word >> 16); 203 word ^= (word >> 8); 204 205 return ((word ^ (word >> 4)) & 0x0f); 206 } 207 208 /* 209 * compute link-local solicited-node multicast address 210 */ 211 212 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, 213 struct in6_addr *solicited) 214 { 215 ipv6_addr_set(solicited, 216 __constant_htonl(0xFF020000), 0, 217 __constant_htonl(0x1), 218 __constant_htonl(0xFF000000) | addr->s6_addr32[3]); 219 } 220 221 222 static inline void ipv6_addr_all_nodes(struct in6_addr *addr) 223 { 224 ipv6_addr_set(addr, 225 __constant_htonl(0xFF020000), 0, 0, 226 __constant_htonl(0x1)); 227 } 228 229 static inline void ipv6_addr_all_routers(struct in6_addr *addr) 230 { 231 ipv6_addr_set(addr, 232 __constant_htonl(0xFF020000), 0, 0, 233 __constant_htonl(0x2)); 234 } 235 236 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) 237 { 238 return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000); 239 } 240 241 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) 242 { 243 return (addr->s6_addr32[0] == htonl(0xff020000) && 244 addr->s6_addr32[1] == 0 && 245 addr->s6_addr32[2] == 0 && 246 addr->s6_addr32[3] == htonl(0x00000001)); 247 } 248 249 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) 250 { 251 return (addr->s6_addr32[0] == htonl(0xff020000) && 252 addr->s6_addr32[1] == 0 && 253 addr->s6_addr32[2] == 0 && 254 addr->s6_addr32[3] == htonl(0x00000002)); 255 } 256 257 static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr) 258 { 259 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || 260 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || 261 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || 262 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || 263 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || 264 ipv4_is_badclass(addr)) ? 0x00 : 0x02; 265 eui[1] = 0; 266 eui[2] = 0x5E; 267 eui[3] = 0xFE; 268 memcpy (eui+4, &addr, 4); 269 return 0; 270 } 271 272 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) 273 { 274 return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE)); 275 } 276 277 #ifdef CONFIG_PROC_FS 278 extern int if6_proc_init(void); 279 extern void if6_proc_exit(void); 280 #endif 281 282 #endif 283 #endif 284