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