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(struct net *net, 59 void __user *arg); 60 extern int addrconf_del_ifaddr(struct net *net, 61 void __user *arg); 62 extern int addrconf_set_dstaddr(struct net *net, 63 void __user *arg); 64 65 extern int ipv6_chk_addr(struct net *net, 66 struct in6_addr *addr, 67 struct net_device *dev, 68 int strict); 69 70 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 71 extern int ipv6_chk_home_addr(struct net *net, 72 struct in6_addr *addr); 73 #endif 74 75 extern int ipv6_chk_prefix(struct in6_addr *addr, 76 struct net_device *dev); 77 78 extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, 79 const struct in6_addr *addr, 80 struct net_device *dev, 81 int strict); 82 83 extern int ipv6_dev_get_saddr(struct net *net, 84 struct net_device *dev, 85 const struct in6_addr *daddr, 86 unsigned int srcprefs, 87 struct in6_addr *saddr); 88 extern int ipv6_get_lladdr(struct net_device *dev, 89 struct in6_addr *addr, 90 unsigned char banned_flags); 91 extern int ipv6_rcv_saddr_equal(const struct sock *sk, 92 const struct sock *sk2); 93 extern void addrconf_join_solict(struct net_device *dev, 94 struct in6_addr *addr); 95 extern void addrconf_leave_solict(struct inet6_dev *idev, 96 struct in6_addr *addr); 97 98 static inline unsigned long addrconf_timeout_fixup(u32 timeout, 99 unsigned unit) 100 { 101 if (timeout == 0xffffffff) 102 return ~0UL; 103 104 /* 105 * Avoid arithmetic overflow. 106 * Assuming unit is constant and non-zero, this "if" statement 107 * will go away on 64bit archs. 108 */ 109 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) 110 return LONG_MAX / unit; 111 112 return timeout; 113 } 114 115 static inline int addrconf_finite_timeout(unsigned long timeout) 116 { 117 return ~timeout; 118 } 119 120 /* 121 * IPv6 Address Label subsystem (addrlabel.c) 122 */ 123 extern int ipv6_addr_label_init(void); 124 extern void ipv6_addr_label_cleanup(void); 125 extern void ipv6_addr_label_rtnl_register(void); 126 extern u32 ipv6_addr_label(struct net *net, 127 const struct in6_addr *addr, 128 int type, int ifindex); 129 130 /* 131 * multicast prototypes (mcast.c) 132 */ 133 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, 134 const struct in6_addr *addr); 135 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, 136 const struct in6_addr *addr); 137 extern void ipv6_sock_mc_close(struct sock *sk); 138 extern int inet6_mc_check(struct sock *sk, 139 const struct in6_addr *mc_addr, 140 const struct in6_addr *src_addr); 141 142 extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); 143 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); 144 extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); 145 extern void ipv6_mc_up(struct inet6_dev *idev); 146 extern void ipv6_mc_down(struct inet6_dev *idev); 147 extern void ipv6_mc_unmap(struct inet6_dev *idev); 148 extern void ipv6_mc_remap(struct inet6_dev *idev); 149 extern void ipv6_mc_init_dev(struct inet6_dev *idev); 150 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); 151 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); 152 153 extern int ipv6_chk_mcast_addr(struct net_device *dev, 154 const struct in6_addr *group, 155 const struct in6_addr *src_addr); 156 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); 157 158 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); 159 160 /* 161 * anycast prototypes (anycast.c) 162 */ 163 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); 164 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); 165 extern void ipv6_sock_ac_close(struct sock *sk); 166 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); 167 168 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); 169 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); 170 extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev, 171 struct in6_addr *addr); 172 173 174 /* Device notifier */ 175 extern int register_inet6addr_notifier(struct notifier_block *nb); 176 extern int unregister_inet6addr_notifier(struct notifier_block *nb); 177 178 /** 179 * __in6_dev_get - get inet6_dev pointer from netdevice 180 * @dev: network device 181 * 182 * Caller must hold rcu_read_lock or RTNL, because this function 183 * does not take a reference on the inet6_dev. 184 */ 185 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) 186 { 187 return rcu_dereference_rtnl(dev->ip6_ptr); 188 } 189 190 /** 191 * in6_dev_get - get inet6_dev pointer from netdevice 192 * @dev: network device 193 * 194 * This version can be used in any context, and takes a reference 195 * on the inet6_dev. Callers must use in6_dev_put() later to 196 * release this reference. 197 */ 198 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) 199 { 200 struct inet6_dev *idev; 201 202 rcu_read_lock(); 203 idev = rcu_dereference(dev->ip6_ptr); 204 if (idev) 205 atomic_inc(&idev->refcnt); 206 rcu_read_unlock(); 207 return idev; 208 } 209 210 extern void in6_dev_finish_destroy(struct inet6_dev *idev); 211 212 static inline void in6_dev_put(struct inet6_dev *idev) 213 { 214 if (atomic_dec_and_test(&idev->refcnt)) 215 in6_dev_finish_destroy(idev); 216 } 217 218 static inline void __in6_dev_put(struct inet6_dev *idev) 219 { 220 atomic_dec(&idev->refcnt); 221 } 222 223 static inline void in6_dev_hold(struct inet6_dev *idev) 224 { 225 atomic_inc(&idev->refcnt); 226 } 227 228 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); 229 230 static inline void in6_ifa_put(struct inet6_ifaddr *ifp) 231 { 232 if (atomic_dec_and_test(&ifp->refcnt)) 233 inet6_ifa_finish_destroy(ifp); 234 } 235 236 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) 237 { 238 atomic_dec(&ifp->refcnt); 239 } 240 241 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) 242 { 243 atomic_inc(&ifp->refcnt); 244 } 245 246 247 /* 248 * compute link-local solicited-node multicast address 249 */ 250 251 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, 252 struct in6_addr *solicited) 253 { 254 ipv6_addr_set(solicited, 255 htonl(0xFF020000), 0, 256 htonl(0x1), 257 htonl(0xFF000000) | addr->s6_addr32[3]); 258 } 259 260 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) 261 { 262 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); 263 } 264 265 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) 266 { 267 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | 268 addr->s6_addr32[1] | addr->s6_addr32[2] | 269 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; 270 } 271 272 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) 273 { 274 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | 275 addr->s6_addr32[1] | addr->s6_addr32[2] | 276 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; 277 } 278 279 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) 280 { 281 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); 282 } 283 284 #ifdef CONFIG_PROC_FS 285 extern int if6_proc_init(void); 286 extern void if6_proc_exit(void); 287 #endif 288 289 #endif 290 #endif 291