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_device *dev, 84 const struct in6_addr *daddr, 85 unsigned int srcprefs, 86 struct in6_addr *saddr); 87 extern int ipv6_get_lladdr(struct net_device *dev, 88 struct in6_addr *addr, 89 unsigned char banned_flags); 90 extern int ipv6_rcv_saddr_equal(const struct sock *sk, 91 const struct sock *sk2); 92 extern void addrconf_join_solict(struct net_device *dev, 93 struct in6_addr *addr); 94 extern void addrconf_leave_solict(struct inet6_dev *idev, 95 struct in6_addr *addr); 96 97 static inline unsigned long addrconf_timeout_fixup(u32 timeout, 98 unsigned unit) 99 { 100 if (timeout == 0xffffffff) 101 return ~0UL; 102 103 /* 104 * Avoid arithmetic overflow. 105 * Assuming unit is constant and non-zero, this "if" statement 106 * will go away on 64bit archs. 107 */ 108 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) 109 return LONG_MAX / unit; 110 111 return timeout; 112 } 113 114 static inline int addrconf_finite_timeout(unsigned long timeout) 115 { 116 return ~timeout; 117 } 118 119 /* 120 * IPv6 Address Label subsystem (addrlabel.c) 121 */ 122 extern int ipv6_addr_label_init(void); 123 extern void ipv6_addr_label_rtnl_register(void); 124 extern u32 ipv6_addr_label(const struct in6_addr *addr, 125 int type, int ifindex); 126 127 /* 128 * multicast prototypes (mcast.c) 129 */ 130 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, 131 const struct in6_addr *addr); 132 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, 133 const struct in6_addr *addr); 134 extern void ipv6_sock_mc_close(struct sock *sk); 135 extern int inet6_mc_check(struct sock *sk, 136 const struct in6_addr *mc_addr, 137 const struct in6_addr *src_addr); 138 139 extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); 140 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); 141 extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); 142 extern void ipv6_mc_up(struct inet6_dev *idev); 143 extern void ipv6_mc_down(struct inet6_dev *idev); 144 extern void ipv6_mc_init_dev(struct inet6_dev *idev); 145 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); 146 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); 147 148 extern int ipv6_chk_mcast_addr(struct net_device *dev, 149 const struct in6_addr *group, 150 const struct in6_addr *src_addr); 151 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); 152 153 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); 154 155 /* 156 * anycast prototypes (anycast.c) 157 */ 158 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); 159 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); 160 extern void ipv6_sock_ac_close(struct sock *sk); 161 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); 162 163 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); 164 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); 165 extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev, 166 struct in6_addr *addr); 167 168 169 /* Device notifier */ 170 extern int register_inet6addr_notifier(struct notifier_block *nb); 171 extern int unregister_inet6addr_notifier(struct notifier_block *nb); 172 173 static inline struct inet6_dev * 174 __in6_dev_get(struct net_device *dev) 175 { 176 return rcu_dereference(dev->ip6_ptr); 177 } 178 179 static inline struct inet6_dev * 180 in6_dev_get(struct net_device *dev) 181 { 182 struct inet6_dev *idev = NULL; 183 rcu_read_lock(); 184 idev = __in6_dev_get(dev); 185 if (idev) 186 atomic_inc(&idev->refcnt); 187 rcu_read_unlock(); 188 return idev; 189 } 190 191 extern void in6_dev_finish_destroy(struct inet6_dev *idev); 192 193 static inline void 194 in6_dev_put(struct inet6_dev *idev) 195 { 196 if (atomic_dec_and_test(&idev->refcnt)) 197 in6_dev_finish_destroy(idev); 198 } 199 200 #define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt) 201 #define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt) 202 203 204 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); 205 206 static inline void in6_ifa_put(struct inet6_ifaddr *ifp) 207 { 208 if (atomic_dec_and_test(&ifp->refcnt)) 209 inet6_ifa_finish_destroy(ifp); 210 } 211 212 #define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt) 213 #define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt) 214 215 216 217 /* 218 * compute link-local solicited-node multicast address 219 */ 220 221 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, 222 struct in6_addr *solicited) 223 { 224 ipv6_addr_set(solicited, 225 htonl(0xFF020000), 0, 226 htonl(0x1), 227 htonl(0xFF000000) | addr->s6_addr32[3]); 228 } 229 230 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) 231 { 232 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); 233 } 234 235 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) 236 { 237 return (((addr->s6_addr32[0] ^ htonl(0xff020000)) | 238 addr->s6_addr32[1] | addr->s6_addr32[2] | 239 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0); 240 } 241 242 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) 243 { 244 return (((addr->s6_addr32[0] ^ htonl(0xff020000)) | 245 addr->s6_addr32[1] | addr->s6_addr32[2] | 246 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0); 247 } 248 249 extern int __ipv6_isatap_ifid(u8 *eui, __be32 addr); 250 251 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) 252 { 253 return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE)); 254 } 255 256 #ifdef CONFIG_PROC_FS 257 extern int if6_proc_init(void); 258 extern void if6_proc_exit(void); 259 #endif 260 261 #endif 262 #endif 263