1 #ifndef _ADDRCONF_H 2 #define _ADDRCONF_H 3 4 #define MAX_RTR_SOLICITATIONS 3 5 #define RTR_SOLICITATION_INTERVAL (4*HZ) 6 7 #define MIN_VALID_LIFETIME (2*3600) /* 2 hours */ 8 9 #define TEMP_VALID_LIFETIME (7*86400) 10 #define TEMP_PREFERRED_LIFETIME (86400) 11 #define REGEN_MAX_RETRY (5) 12 #define MAX_DESYNC_FACTOR (600) 13 14 #define ADDR_CHECK_FREQUENCY (120*HZ) 15 16 #define IPV6_MAX_ADDRESSES 16 17 18 #include <linux/in.h> 19 #include <linux/in6.h> 20 21 struct prefix_info { 22 __u8 type; 23 __u8 length; 24 __u8 prefix_len; 25 26 #if defined(__BIG_ENDIAN_BITFIELD) 27 __u8 onlink : 1, 28 autoconf : 1, 29 reserved : 6; 30 #elif defined(__LITTLE_ENDIAN_BITFIELD) 31 __u8 reserved : 6, 32 autoconf : 1, 33 onlink : 1; 34 #else 35 #error "Please fix <asm/byteorder.h>" 36 #endif 37 __be32 valid; 38 __be32 prefered; 39 __be32 reserved2; 40 41 struct in6_addr prefix; 42 }; 43 44 45 #ifdef __KERNEL__ 46 47 #include <linux/netdevice.h> 48 #include <net/if_inet6.h> 49 #include <net/ipv6.h> 50 51 #define IN6_ADDR_HSIZE 16 52 53 extern int addrconf_init(void); 54 extern void addrconf_cleanup(void); 55 56 extern int addrconf_add_ifaddr(struct net *net, 57 void __user *arg); 58 extern int addrconf_del_ifaddr(struct net *net, 59 void __user *arg); 60 extern int addrconf_set_dstaddr(struct net *net, 61 void __user *arg); 62 63 extern int ipv6_chk_addr(struct net *net, 64 struct in6_addr *addr, 65 struct net_device *dev, 66 int strict); 67 68 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 69 extern int ipv6_chk_home_addr(struct net *net, 70 struct in6_addr *addr); 71 #endif 72 73 extern int ipv6_chk_prefix(struct in6_addr *addr, 74 struct net_device *dev); 75 76 extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, 77 const struct in6_addr *addr, 78 struct net_device *dev, 79 int strict); 80 81 extern int ipv6_dev_get_saddr(struct net *net, 82 struct net_device *dev, 83 const struct in6_addr *daddr, 84 unsigned int srcprefs, 85 struct in6_addr *saddr); 86 extern int ipv6_get_lladdr(struct net_device *dev, 87 struct in6_addr *addr, 88 unsigned char banned_flags); 89 extern int ipv6_rcv_saddr_equal(const struct sock *sk, 90 const struct sock *sk2); 91 extern void addrconf_join_solict(struct net_device *dev, 92 struct in6_addr *addr); 93 extern void addrconf_leave_solict(struct inet6_dev *idev, 94 struct in6_addr *addr); 95 96 static inline unsigned long addrconf_timeout_fixup(u32 timeout, 97 unsigned unit) 98 { 99 if (timeout == 0xffffffff) 100 return ~0UL; 101 102 /* 103 * Avoid arithmetic overflow. 104 * Assuming unit is constant and non-zero, this "if" statement 105 * will go away on 64bit archs. 106 */ 107 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) 108 return LONG_MAX / unit; 109 110 return timeout; 111 } 112 113 static inline int addrconf_finite_timeout(unsigned long timeout) 114 { 115 return ~timeout; 116 } 117 118 /* 119 * IPv6 Address Label subsystem (addrlabel.c) 120 */ 121 extern int ipv6_addr_label_init(void); 122 extern void ipv6_addr_label_cleanup(void); 123 extern void ipv6_addr_label_rtnl_register(void); 124 extern u32 ipv6_addr_label(struct net *net, 125 const struct in6_addr *addr, 126 int type, int ifindex); 127 128 /* 129 * multicast prototypes (mcast.c) 130 */ 131 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, 132 const struct in6_addr *addr); 133 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, 134 const struct in6_addr *addr); 135 extern void ipv6_sock_mc_close(struct sock *sk); 136 extern int inet6_mc_check(struct sock *sk, 137 const struct in6_addr *mc_addr, 138 const struct in6_addr *src_addr); 139 140 extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); 141 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); 142 extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); 143 extern void ipv6_mc_up(struct inet6_dev *idev); 144 extern void ipv6_mc_down(struct inet6_dev *idev); 145 extern void ipv6_mc_unmap(struct inet6_dev *idev); 146 extern void ipv6_mc_remap(struct inet6_dev *idev); 147 extern void ipv6_mc_init_dev(struct inet6_dev *idev); 148 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); 149 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); 150 151 extern int ipv6_chk_mcast_addr(struct net_device *dev, 152 const struct in6_addr *group, 153 const struct in6_addr *src_addr); 154 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); 155 156 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); 157 158 /* 159 * anycast prototypes (anycast.c) 160 */ 161 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); 162 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); 163 extern void ipv6_sock_ac_close(struct sock *sk); 164 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); 165 166 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); 167 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); 168 extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev, 169 struct in6_addr *addr); 170 171 172 /* Device notifier */ 173 extern int register_inet6addr_notifier(struct notifier_block *nb); 174 extern int unregister_inet6addr_notifier(struct notifier_block *nb); 175 176 /** 177 * __in6_dev_get - get inet6_dev pointer from netdevice 178 * @dev: network device 179 * 180 * Caller must hold rcu_read_lock or RTNL, because this function 181 * does not take a reference on the inet6_dev. 182 */ 183 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) 184 { 185 return rcu_dereference_rtnl(dev->ip6_ptr); 186 } 187 188 /** 189 * in6_dev_get - get inet6_dev pointer from netdevice 190 * @dev: network device 191 * 192 * This version can be used in any context, and takes a reference 193 * on the inet6_dev. Callers must use in6_dev_put() later to 194 * release this reference. 195 */ 196 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) 197 { 198 struct inet6_dev *idev; 199 200 rcu_read_lock(); 201 idev = rcu_dereference(dev->ip6_ptr); 202 if (idev) 203 atomic_inc(&idev->refcnt); 204 rcu_read_unlock(); 205 return idev; 206 } 207 208 extern void in6_dev_finish_destroy(struct inet6_dev *idev); 209 210 static inline void in6_dev_put(struct inet6_dev *idev) 211 { 212 if (atomic_dec_and_test(&idev->refcnt)) 213 in6_dev_finish_destroy(idev); 214 } 215 216 static inline void __in6_dev_put(struct inet6_dev *idev) 217 { 218 atomic_dec(&idev->refcnt); 219 } 220 221 static inline void in6_dev_hold(struct inet6_dev *idev) 222 { 223 atomic_inc(&idev->refcnt); 224 } 225 226 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); 227 228 static inline void in6_ifa_put(struct inet6_ifaddr *ifp) 229 { 230 if (atomic_dec_and_test(&ifp->refcnt)) 231 inet6_ifa_finish_destroy(ifp); 232 } 233 234 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) 235 { 236 atomic_dec(&ifp->refcnt); 237 } 238 239 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) 240 { 241 atomic_inc(&ifp->refcnt); 242 } 243 244 245 /* 246 * compute link-local solicited-node multicast address 247 */ 248 249 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, 250 struct in6_addr *solicited) 251 { 252 ipv6_addr_set(solicited, 253 htonl(0xFF020000), 0, 254 htonl(0x1), 255 htonl(0xFF000000) | addr->s6_addr32[3]); 256 } 257 258 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) 259 { 260 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); 261 } 262 263 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) 264 { 265 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | 266 addr->s6_addr32[1] | addr->s6_addr32[2] | 267 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; 268 } 269 270 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) 271 { 272 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | 273 addr->s6_addr32[1] | addr->s6_addr32[2] | 274 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; 275 } 276 277 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) 278 { 279 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); 280 } 281 282 #ifdef CONFIG_PROC_FS 283 extern int if6_proc_init(void); 284 extern void if6_proc_exit(void); 285 #endif 286 287 #endif 288 #endif 289