Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ADDRCONF_H |
| 2 | #define _ADDRCONF_H |
| 3 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 (5) |
| 12 | #define MAX_DESYNC_FACTOR (600) |
| 13 | |
| 14 | #define ADDR_CHECK_FREQUENCY (120*HZ) |
| 15 | |
| 16 | #define IPV6_MAX_ADDRESSES 16 |
| 17 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 18 | #include <linux/in.h> |
Patrick McHardy | 6a800d4 | 2005-05-03 22:17:18 -0700 | [diff] [blame] | 19 | #include <linux/in6.h> |
| 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 37 | __be32 valid; |
| 38 | __be32 prefered; |
| 39 | __be32 reserved2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | struct in6_addr prefix; |
| 42 | }; |
| 43 | |
| 44 | |
| 45 | #ifdef __KERNEL__ |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include <linux/netdevice.h> |
| 48 | #include <net/if_inet6.h> |
Herbert Xu | e4553ed | 2005-05-03 14:25:13 -0700 | [diff] [blame] | 49 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | #define IN6_ADDR_HSIZE 16 |
| 52 | |
| 53 | extern int addrconf_init(void); |
| 54 | extern void addrconf_cleanup(void); |
| 55 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 56 | extern int addrconf_add_ifaddr(struct net *net, |
| 57 | void __user *arg); |
| 58 | extern int addrconf_del_ifaddr(struct net *net, |
| 59 | void __user *arg); |
| 60 | extern int addrconf_set_dstaddr(struct net *net, |
| 61 | void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 63 | extern int ipv6_chk_addr(struct net *net, |
| 64 | struct in6_addr *addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | struct net_device *dev, |
| 66 | int strict); |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 67 | |
Masahide NAKAMURA | 59fbb3a6 | 2007-06-26 23:56:32 -0700 | [diff] [blame] | 68 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
Daniel Lezcano | 389f661 | 2008-01-10 22:44:40 -0800 | [diff] [blame] | 69 | extern int ipv6_chk_home_addr(struct net *net, |
| 70 | struct in6_addr *addr); |
Masahide NAKAMURA | 65d4ed9 | 2006-08-23 19:16:22 -0700 | [diff] [blame] | 71 | #endif |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 72 | |
| 73 | extern int ipv6_chk_prefix(struct in6_addr *addr, |
| 74 | struct net_device *dev); |
| 75 | |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 76 | extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 77 | const struct in6_addr *addr, |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 78 | struct net_device *dev, |
| 79 | int strict); |
| 80 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 81 | extern int ipv6_dev_get_saddr(struct net *net, |
| 82 | struct net_device *dev, |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 83 | const struct in6_addr *daddr, |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 84 | unsigned int srcprefs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | struct in6_addr *saddr); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 86 | extern int ipv6_get_lladdr(struct net_device *dev, |
| 87 | struct in6_addr *addr, |
| 88 | unsigned char banned_flags); |
Vlad Yasevich | b2f5e7c | 2009-03-24 16:24:51 +0000 | [diff] [blame] | 89 | extern int ipv6_rcv_saddr_equal(const struct sock *sk, |
| 90 | const struct sock *sk2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | extern void addrconf_join_solict(struct net_device *dev, |
| 92 | struct in6_addr *addr); |
| 93 | extern void addrconf_leave_solict(struct inet6_dev *idev, |
| 94 | struct in6_addr *addr); |
| 95 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 96 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
| 97 | unsigned unit) |
| 98 | { |
| 99 | if (timeout == 0xffffffff) |
| 100 | return ~0UL; |
| 101 | |
| 102 | /* |
| 103 | * Avoid arithmetic overflow. |
| 104 | * Assuming unit is constant and non-zero, this "if" statement |
| 105 | * will go away on 64bit archs. |
| 106 | */ |
| 107 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) |
| 108 | return LONG_MAX / unit; |
| 109 | |
| 110 | return timeout; |
| 111 | } |
| 112 | |
| 113 | static inline int addrconf_finite_timeout(unsigned long timeout) |
| 114 | { |
| 115 | return ~timeout; |
| 116 | } |
| 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | /* |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 119 | * IPv6 Address Label subsystem (addrlabel.c) |
| 120 | */ |
| 121 | extern int ipv6_addr_label_init(void); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 122 | extern void ipv6_addr_label_cleanup(void); |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 123 | extern void ipv6_addr_label_rtnl_register(void); |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 124 | extern u32 ipv6_addr_label(struct net *net, |
| 125 | const struct in6_addr *addr, |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 126 | int type, int ifindex); |
| 127 | |
| 128 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | * multicast prototypes (mcast.c) |
| 130 | */ |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | extern void ipv6_sock_mc_close(struct sock *sk); |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 136 | extern int inet6_mc_check(struct sock *sk, |
| 137 | const struct in6_addr *mc_addr, |
| 138 | const struct in6_addr *src_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | extern void ipv6_mc_up(struct inet6_dev *idev); |
| 144 | extern void ipv6_mc_down(struct inet6_dev *idev); |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 145 | extern void ipv6_mc_unmap(struct inet6_dev *idev); |
| 146 | extern void ipv6_mc_remap(struct inet6_dev *idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | extern void ipv6_mc_init_dev(struct inet6_dev *idev); |
| 148 | extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); |
| 149 | extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); |
| 150 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 151 | extern int ipv6_chk_mcast_addr(struct net_device *dev, |
| 152 | const struct in6_addr *group, |
| 153 | const struct in6_addr *src_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); |
| 155 | |
| 156 | extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); |
| 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | /* |
| 159 | * anycast prototypes (anycast.c) |
| 160 | */ |
| 161 | extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); |
| 162 | extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); |
| 163 | extern void ipv6_sock_ac_close(struct sock *sk); |
| 164 | extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); |
| 165 | |
| 166 | extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); |
| 167 | extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); |
Daniel Lezcano | 6ab57e7 | 2008-03-26 16:52:32 -0700 | [diff] [blame] | 168 | extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev, |
| 169 | struct in6_addr *addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
| 171 | |
| 172 | /* Device notifier */ |
| 173 | extern int register_inet6addr_notifier(struct notifier_block *nb); |
| 174 | extern int unregister_inet6addr_notifier(struct notifier_block *nb); |
| 175 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 176 | /** |
| 177 | * __in6_dev_get - get inet6_dev pointer from netdevice |
| 178 | * @dev: network device |
| 179 | * |
| 180 | * Caller must hold rcu_read_lock or RTNL, because this function |
| 181 | * does not take a reference on the inet6_dev. |
| 182 | */ |
| 183 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 185 | return rcu_dereference_rtnl(dev->ip6_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 188 | /** |
| 189 | * in6_dev_get - get inet6_dev pointer from netdevice |
| 190 | * @dev: network device |
| 191 | * |
| 192 | * This version can be used in any context, and takes a reference |
| 193 | * on the inet6_dev. Callers must use in6_dev_put() later to |
| 194 | * release this reference. |
| 195 | */ |
| 196 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | { |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 198 | struct inet6_dev *idev; |
| 199 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 200 | rcu_read_lock(); |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 201 | idev = rcu_dereference(dev->ip6_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | if (idev) |
| 203 | atomic_inc(&idev->refcnt); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 204 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | return idev; |
| 206 | } |
| 207 | |
| 208 | extern void in6_dev_finish_destroy(struct inet6_dev *idev); |
| 209 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 210 | static inline void in6_dev_put(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | { |
| 212 | if (atomic_dec_and_test(&idev->refcnt)) |
| 213 | in6_dev_finish_destroy(idev); |
| 214 | } |
| 215 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 216 | static inline void __in6_dev_put(struct inet6_dev *idev) |
| 217 | { |
| 218 | atomic_dec(&idev->refcnt); |
| 219 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 221 | static inline void in6_dev_hold(struct inet6_dev *idev) |
| 222 | { |
| 223 | atomic_inc(&idev->refcnt); |
| 224 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
| 226 | extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
| 227 | |
| 228 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) |
| 229 | { |
| 230 | if (atomic_dec_and_test(&ifp->refcnt)) |
| 231 | inet6_ifa_finish_destroy(ifp); |
| 232 | } |
| 233 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 234 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
| 235 | { |
| 236 | atomic_dec(&ifp->refcnt); |
| 237 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 239 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
| 240 | { |
| 241 | atomic_inc(&ifp->refcnt); |
| 242 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
| 245 | /* |
| 246 | * compute link-local solicited-node multicast address |
| 247 | */ |
| 248 | |
| 249 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, |
| 250 | struct in6_addr *solicited) |
| 251 | { |
| 252 | ipv6_addr_set(solicited, |
YOSHIFUJI Hideaki | 0e7b8dc | 2008-02-28 17:03:12 +0900 | [diff] [blame] | 253 | htonl(0xFF020000), 0, |
| 254 | htonl(0x1), |
| 255 | htonl(0xFF000000) | addr->s6_addr32[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } |
| 257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) |
| 259 | { |
YOSHIFUJI Hideaki | 0e7b8dc | 2008-02-28 17:03:12 +0900 | [diff] [blame] | 260 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
| 264 | { |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 265 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
YOSHIFUJI Hideaki | fed85383 | 2008-04-11 20:17:55 +0900 | [diff] [blame] | 266 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 267 | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
| 271 | { |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 272 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
YOSHIFUJI Hideaki | fed85383 | 2008-04-11 20:17:55 +0900 | [diff] [blame] | 273 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 274 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 277 | static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) |
| 278 | { |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 279 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 280 | } |
| 281 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 282 | #ifdef CONFIG_PROC_FS |
| 283 | extern int if6_proc_init(void); |
| 284 | extern void if6_proc_exit(void); |
| 285 | #endif |
| 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | #endif |
| 288 | #endif |