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(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_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, u8 *opt, int len); 155 156 /* 157 * anycast prototypes (anycast.c) 158 */ 159 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); 160 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); 161 extern void ipv6_sock_ac_close(struct sock *sk); 162 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); 163 164 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); 165 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); 166 extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev, 167 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 static inline struct inet6_dev * 175 __in6_dev_get(struct net_device *dev) 176 { 177 return rcu_dereference(dev->ip6_ptr); 178 } 179 180 static inline struct inet6_dev * 181 in6_dev_get(struct net_device *dev) 182 { 183 struct inet6_dev *idev = NULL; 184 rcu_read_lock(); 185 idev = __in6_dev_get(dev); 186 if (idev) 187 atomic_inc(&idev->refcnt); 188 rcu_read_unlock(); 189 return idev; 190 } 191 192 extern void in6_dev_finish_destroy(struct inet6_dev *idev); 193 194 static inline void 195 in6_dev_put(struct inet6_dev *idev) 196 { 197 if (atomic_dec_and_test(&idev->refcnt)) 198 in6_dev_finish_destroy(idev); 199 } 200 201 #define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt) 202 #define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt) 203 204 205 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); 206 207 static inline void in6_ifa_put(struct inet6_ifaddr *ifp) 208 { 209 if (atomic_dec_and_test(&ifp->refcnt)) 210 inet6_ifa_finish_destroy(ifp); 211 } 212 213 #define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt) 214 #define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt) 215 216 217 218 /* 219 * compute link-local solicited-node multicast address 220 */ 221 222 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, 223 struct in6_addr *solicited) 224 { 225 ipv6_addr_set(solicited, 226 htonl(0xFF020000), 0, 227 htonl(0x1), 228 htonl(0xFF000000) | addr->s6_addr32[3]); 229 } 230 231 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) 232 { 233 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); 234 } 235 236 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) 237 { 238 return (((addr->s6_addr32[0] ^ htonl(0xff020000)) | 239 addr->s6_addr32[1] | addr->s6_addr32[2] | 240 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0); 241 } 242 243 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) 244 { 245 return (((addr->s6_addr32[0] ^ htonl(0xff020000)) | 246 addr->s6_addr32[1] | addr->s6_addr32[2] | 247 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0); 248 } 249 250 extern int __ipv6_isatap_ifid(u8 *eui, __be32 addr); 251 252 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) 253 { 254 return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE)); 255 } 256 257 #ifdef CONFIG_PROC_FS 258 extern int if6_proc_init(void); 259 extern void if6_proc_exit(void); 260 #endif 261 262 #endif 263 #endif 264