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 /* 98 * IPv6 Address Label subsystem (addrlabel.c) 99 */ 100 extern int ipv6_addr_label_init(void); 101 extern void ipv6_addr_label_rtnl_register(void); 102 extern u32 ipv6_addr_label(const struct in6_addr *addr, 103 int type, int ifindex); 104 105 /* 106 * multicast prototypes (mcast.c) 107 */ 108 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, 109 const struct in6_addr *addr); 110 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, 111 const struct in6_addr *addr); 112 extern void ipv6_sock_mc_close(struct sock *sk); 113 extern int inet6_mc_check(struct sock *sk, 114 const struct in6_addr *mc_addr, 115 const struct in6_addr *src_addr); 116 117 extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); 118 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); 119 extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); 120 extern void ipv6_mc_up(struct inet6_dev *idev); 121 extern void ipv6_mc_down(struct inet6_dev *idev); 122 extern void ipv6_mc_init_dev(struct inet6_dev *idev); 123 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); 124 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); 125 126 extern int ipv6_chk_mcast_addr(struct net_device *dev, 127 const struct in6_addr *group, 128 const struct in6_addr *src_addr); 129 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); 130 131 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); 132 133 /* 134 * anycast prototypes (anycast.c) 135 */ 136 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); 137 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); 138 extern void ipv6_sock_ac_close(struct sock *sk); 139 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); 140 141 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); 142 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); 143 extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev, 144 struct in6_addr *addr); 145 146 147 /* Device notifier */ 148 extern int register_inet6addr_notifier(struct notifier_block *nb); 149 extern int unregister_inet6addr_notifier(struct notifier_block *nb); 150 151 static inline struct inet6_dev * 152 __in6_dev_get(struct net_device *dev) 153 { 154 return rcu_dereference(dev->ip6_ptr); 155 } 156 157 static inline struct inet6_dev * 158 in6_dev_get(struct net_device *dev) 159 { 160 struct inet6_dev *idev = NULL; 161 rcu_read_lock(); 162 idev = __in6_dev_get(dev); 163 if (idev) 164 atomic_inc(&idev->refcnt); 165 rcu_read_unlock(); 166 return idev; 167 } 168 169 extern void in6_dev_finish_destroy(struct inet6_dev *idev); 170 171 static inline void 172 in6_dev_put(struct inet6_dev *idev) 173 { 174 if (atomic_dec_and_test(&idev->refcnt)) 175 in6_dev_finish_destroy(idev); 176 } 177 178 #define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt) 179 #define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt) 180 181 182 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); 183 184 static inline void in6_ifa_put(struct inet6_ifaddr *ifp) 185 { 186 if (atomic_dec_and_test(&ifp->refcnt)) 187 inet6_ifa_finish_destroy(ifp); 188 } 189 190 #define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt) 191 #define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt) 192 193 194 195 /* 196 * compute link-local solicited-node multicast address 197 */ 198 199 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, 200 struct in6_addr *solicited) 201 { 202 ipv6_addr_set(solicited, 203 htonl(0xFF020000), 0, 204 htonl(0x1), 205 htonl(0xFF000000) | addr->s6_addr32[3]); 206 } 207 208 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) 209 { 210 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); 211 } 212 213 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) 214 { 215 return (((addr->s6_addr32[0] ^ htonl(0xff020000)) | 216 addr->s6_addr32[1] | addr->s6_addr32[2] | 217 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0); 218 } 219 220 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) 221 { 222 return (((addr->s6_addr32[0] ^ htonl(0xff020000)) | 223 addr->s6_addr32[1] | addr->s6_addr32[2] | 224 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0); 225 } 226 227 extern int __ipv6_isatap_ifid(u8 *eui, __be32 addr); 228 229 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) 230 { 231 return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE)); 232 } 233 234 #ifdef CONFIG_PROC_FS 235 extern int if6_proc_init(void); 236 extern void if6_proc_exit(void); 237 #endif 238 239 #endif 240 #endif 241