| 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_SHIFT 4 |
| 50 | #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT) |
| 51 | |
| 52 | extern int addrconf_init(void); |
| 53 | extern void addrconf_cleanup(void); |
| 54 | |
| 55 | extern int addrconf_add_ifaddr(struct net *net, |
| 56 | void __user *arg); |
| 57 | extern int addrconf_del_ifaddr(struct net *net, |
| 58 | void __user *arg); |
| 59 | extern int addrconf_set_dstaddr(struct net *net, |
| 60 | void __user *arg); |
| 61 | |
| 62 | extern int ipv6_chk_addr(struct net *net, |
| 63 | const struct in6_addr *addr, |
| 64 | struct net_device *dev, |
| 65 | int strict); |
| 66 | |
| 67 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
| 68 | extern int ipv6_chk_home_addr(struct net *net, |
| 69 | const struct in6_addr *addr); |
| 70 | #endif |
| 71 | |
| 72 | extern int ipv6_chk_prefix(const struct in6_addr *addr, |
| 73 | struct net_device *dev); |
| 74 | |
| 75 | extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, |
| 76 | const struct in6_addr *addr, |
| 77 | struct net_device *dev, |
| 78 | int strict); |
| 79 | |
| 80 | extern int ipv6_dev_get_saddr(struct net *net, |
| 81 | const struct net_device *dev, |
| 82 | const struct in6_addr *daddr, |
| 83 | unsigned int srcprefs, |
| 84 | struct in6_addr *saddr); |
| 85 | extern int ipv6_get_lladdr(struct net_device *dev, |
| 86 | struct in6_addr *addr, |
| 87 | unsigned char banned_flags); |
| 88 | extern int ipv6_rcv_saddr_equal(const struct sock *sk, |
| 89 | const struct sock *sk2); |
| 90 | extern void addrconf_join_solict(struct net_device *dev, |
| 91 | const struct in6_addr *addr); |
| 92 | extern void addrconf_leave_solict(struct inet6_dev *idev, |
| 93 | const struct in6_addr *addr); |
| 94 | |
| 95 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
| 96 | unsigned int unit) |
| 97 | { |
| 98 | if (timeout == 0xffffffff) |
| 99 | return ~0UL; |
| 100 | |
| 101 | /* |
| 102 | * Avoid arithmetic overflow. |
| 103 | * Assuming unit is constant and non-zero, this "if" statement |
| 104 | * will go away on 64bit archs. |
| 105 | */ |
| 106 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) |
| 107 | return LONG_MAX / unit; |
| 108 | |
| 109 | return timeout; |
| 110 | } |
| 111 | |
| 112 | static inline int addrconf_finite_timeout(unsigned long timeout) |
| 113 | { |
| 114 | return ~timeout; |
| 115 | } |
| 116 | |
| 117 | /* |
| 118 | * IPv6 Address Label subsystem (addrlabel.c) |
| 119 | */ |
| 120 | extern int ipv6_addr_label_init(void); |
| 121 | extern void ipv6_addr_label_cleanup(void); |
| 122 | extern void ipv6_addr_label_rtnl_register(void); |
| 123 | extern u32 ipv6_addr_label(struct net *net, |
| 124 | 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 bool 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_unmap(struct inet6_dev *idev); |
| 145 | extern void ipv6_mc_remap(struct inet6_dev *idev); |
| 146 | extern void ipv6_mc_init_dev(struct inet6_dev *idev); |
| 147 | extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); |
| 148 | extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); |
| 149 | |
| 150 | extern bool ipv6_chk_mcast_addr(struct net_device *dev, |
| 151 | const struct in6_addr *group, |
| 152 | const struct in6_addr *src_addr); |
| 153 | |
| 154 | /* |
| 155 | * identify MLD packets for MLD filter exceptions |
| 156 | */ |
| 157 | static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) |
| 158 | { |
| 159 | struct icmp6hdr *hdr; |
| 160 | |
| 161 | if (nexthdr != IPPROTO_ICMPV6 || |
| 162 | !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) |
| 163 | return false; |
| 164 | |
| 165 | hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); |
| 166 | |
| 167 | switch (hdr->icmp6_type) { |
| 168 | case ICMPV6_MGM_QUERY: |
| 169 | case ICMPV6_MGM_REPORT: |
| 170 | case ICMPV6_MGM_REDUCTION: |
| 171 | case ICMPV6_MLD2_REPORT: |
| 172 | return true; |
| 173 | default: |
| 174 | break; |
| 175 | } |
| 176 | return false; |
| 177 | } |
| 178 | |
| 179 | extern void addrconf_prefix_rcv(struct net_device *dev, |
| 180 | u8 *opt, int len, bool sllao); |
| 181 | |
| 182 | /* |
| 183 | * anycast prototypes (anycast.c) |
| 184 | */ |
| 185 | extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr); |
| 186 | extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr); |
| 187 | extern void ipv6_sock_ac_close(struct sock *sk); |
| 188 | |
| 189 | extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr); |
| 190 | extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
| 191 | extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, |
| 192 | const struct in6_addr *addr); |
| 193 | |
| 194 | |
| 195 | /* Device notifier */ |
| 196 | extern int register_inet6addr_notifier(struct notifier_block *nb); |
| 197 | extern int unregister_inet6addr_notifier(struct notifier_block *nb); |
| 198 | |
| 199 | extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
| 200 | struct ipv6_devconf *devconf); |
| 201 | |
| 202 | /** |
| 203 | * __in6_dev_get - get inet6_dev pointer from netdevice |
| 204 | * @dev: network device |
| 205 | * |
| 206 | * Caller must hold rcu_read_lock or RTNL, because this function |
| 207 | * does not take a reference on the inet6_dev. |
| 208 | */ |
| 209 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) |
| 210 | { |
| 211 | return rcu_dereference_rtnl(dev->ip6_ptr); |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * in6_dev_get - get inet6_dev pointer from netdevice |
| 216 | * @dev: network device |
| 217 | * |
| 218 | * This version can be used in any context, and takes a reference |
| 219 | * on the inet6_dev. Callers must use in6_dev_put() later to |
| 220 | * release this reference. |
| 221 | */ |
| 222 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) |
| 223 | { |
| 224 | struct inet6_dev *idev; |
| 225 | |
| 226 | rcu_read_lock(); |
| 227 | idev = rcu_dereference(dev->ip6_ptr); |
| 228 | if (idev) |
| 229 | atomic_inc(&idev->refcnt); |
| 230 | rcu_read_unlock(); |
| 231 | return idev; |
| 232 | } |
| 233 | |
| 234 | extern void in6_dev_finish_destroy(struct inet6_dev *idev); |
| 235 | |
| 236 | static inline void in6_dev_put(struct inet6_dev *idev) |
| 237 | { |
| 238 | if (atomic_dec_and_test(&idev->refcnt)) |
| 239 | in6_dev_finish_destroy(idev); |
| 240 | } |
| 241 | |
| 242 | static inline void __in6_dev_put(struct inet6_dev *idev) |
| 243 | { |
| 244 | atomic_dec(&idev->refcnt); |
| 245 | } |
| 246 | |
| 247 | static inline void in6_dev_hold(struct inet6_dev *idev) |
| 248 | { |
| 249 | atomic_inc(&idev->refcnt); |
| 250 | } |
| 251 | |
| 252 | extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
| 253 | |
| 254 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) |
| 255 | { |
| 256 | if (atomic_dec_and_test(&ifp->refcnt)) |
| 257 | inet6_ifa_finish_destroy(ifp); |
| 258 | } |
| 259 | |
| 260 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
| 261 | { |
| 262 | atomic_dec(&ifp->refcnt); |
| 263 | } |
| 264 | |
| 265 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
| 266 | { |
| 267 | atomic_inc(&ifp->refcnt); |
| 268 | } |
| 269 | |
| 270 | |
| 271 | /* |
| 272 | * compute link-local solicited-node multicast address |
| 273 | */ |
| 274 | |
| 275 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, |
| 276 | struct in6_addr *solicited) |
| 277 | { |
| 278 | ipv6_addr_set(solicited, |
| 279 | htonl(0xFF020000), 0, |
| 280 | htonl(0x1), |
| 281 | htonl(0xFF000000) | addr->s6_addr32[3]); |
| 282 | } |
| 283 | |
| 284 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
| 285 | { |
| 286 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); |
| 287 | } |
| 288 | |
| 289 | static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
| 290 | { |
| 291 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
| 292 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
| 293 | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
| 294 | } |
| 295 | |
| 296 | static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
| 297 | { |
| 298 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
| 299 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
| 300 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
| 301 | } |
| 302 | |
| 303 | static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
| 304 | { |
| 305 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
| 306 | } |
| 307 | |
| 308 | static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
| 309 | { |
| 310 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
| 311 | __u64 *p = (__u64 *)addr; |
| 312 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | |
| 313 | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & |
| 314 | cpu_to_be64(0xffffffffff000000UL))) == 0UL; |
| 315 | #else |
| 316 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
| 317 | addr->s6_addr32[1] | |
| 318 | (addr->s6_addr32[2] ^ htonl(0x00000001)) | |
| 319 | (addr->s6_addr[12] ^ 0xff)) == 0; |
| 320 | #endif |
| 321 | } |
| 322 | |
| 323 | #ifdef CONFIG_PROC_FS |
| 324 | extern int if6_proc_init(void); |
| 325 | extern void if6_proc_exit(void); |
| 326 | #endif |
| 327 | |
| 328 | #endif |