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 23struct 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 55extern int addrconf_init(void); 56extern void addrconf_cleanup(void); 57 58extern int addrconf_add_ifaddr(struct net *net, 59 void __user *arg); 60extern int addrconf_del_ifaddr(struct net *net, 61 void __user *arg); 62extern int addrconf_set_dstaddr(struct net *net, 63 void __user *arg); 64 65extern 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) 71extern int ipv6_chk_home_addr(struct net *net, 72 struct in6_addr *addr); 73#endif 74 75extern int ipv6_chk_prefix(struct in6_addr *addr, 76 struct net_device *dev); 77 78extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, 79 const struct in6_addr *addr, 80 struct net_device *dev, 81 int strict); 82 83extern int ipv6_dev_get_saddr(struct net *net, 84 struct net_device *dev, 85 const struct in6_addr *daddr, 86 unsigned int srcprefs, 87 struct in6_addr *saddr); 88extern int ipv6_get_lladdr(struct net_device *dev, 89 struct in6_addr *addr, 90 unsigned char banned_flags); 91extern int ipv6_rcv_saddr_equal(const struct sock *sk, 92 const struct sock *sk2); 93extern void addrconf_join_solict(struct net_device *dev, 94 struct in6_addr *addr); 95extern void addrconf_leave_solict(struct inet6_dev *idev, 96 struct in6_addr *addr); 97 98static inline unsigned long addrconf_timeout_fixup(u32 timeout, 99 unsigned unit) 100{ 101 if (timeout == 0xffffffff) 102 return ~0UL; 103 104 /* 105 * Avoid arithmetic overflow. 106 * Assuming unit is constant and non-zero, this "if" statement 107 * will go away on 64bit archs. 108 */ 109 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) 110 return LONG_MAX / unit; 111 112 return timeout; 113} 114 115static inline int addrconf_finite_timeout(unsigned long timeout) 116{ 117 return ~timeout; 118} 119 120/* 121 * IPv6 Address Label subsystem (addrlabel.c) 122 */ 123extern int ipv6_addr_label_init(void); 124extern void ipv6_addr_label_cleanup(void); 125extern void ipv6_addr_label_rtnl_register(void); 126extern u32 ipv6_addr_label(struct net *net, 127 const struct in6_addr *addr, 128 int type, int ifindex); 129 130/* 131 * multicast prototypes (mcast.c) 132 */ 133extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, 134 const struct in6_addr *addr); 135extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, 136 const struct in6_addr *addr); 137extern void ipv6_sock_mc_close(struct sock *sk); 138extern int inet6_mc_check(struct sock *sk, 139 const struct in6_addr *mc_addr, 140 const struct in6_addr *src_addr); 141 142extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); 143extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); 144extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); 145extern void ipv6_mc_up(struct inet6_dev *idev); 146extern void ipv6_mc_down(struct inet6_dev *idev); 147extern void ipv6_mc_unmap(struct inet6_dev *idev); 148extern void ipv6_mc_remap(struct inet6_dev *idev); 149extern void ipv6_mc_init_dev(struct inet6_dev *idev); 150extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); 151extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); 152 153extern int ipv6_chk_mcast_addr(struct net_device *dev, 154 const struct in6_addr *group, 155 const struct in6_addr *src_addr); 156extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); 157 158extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); 159 160/* 161 * anycast prototypes (anycast.c) 162 */ 163extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); 164extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); 165extern void ipv6_sock_ac_close(struct sock *sk); 166extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); 167 168extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); 169extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); 170extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev, 171 struct in6_addr *addr); 172 173 174/* Device notifier */ 175extern int register_inet6addr_notifier(struct notifier_block *nb); 176extern int unregister_inet6addr_notifier(struct notifier_block *nb); 177 178static inline struct inet6_dev * 179__in6_dev_get(struct net_device *dev) 180{ 181 return rcu_dereference_check(dev->ip6_ptr, 182 rcu_read_lock_held() || 183 lockdep_rtnl_is_held()); 184} 185 186static inline struct inet6_dev * 187in6_dev_get(struct net_device *dev) 188{ 189 struct inet6_dev *idev = NULL; 190 rcu_read_lock(); 191 idev = __in6_dev_get(dev); 192 if (idev) 193 atomic_inc(&idev->refcnt); 194 rcu_read_unlock(); 195 return idev; 196} 197 198extern void in6_dev_finish_destroy(struct inet6_dev *idev); 199 200static inline void 201in6_dev_put(struct inet6_dev *idev) 202{ 203 if (atomic_dec_and_test(&idev->refcnt)) 204 in6_dev_finish_destroy(idev); 205} 206 207#define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt) 208#define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt) 209 210 211extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); 212 213static inline void in6_ifa_put(struct inet6_ifaddr *ifp) 214{ 215 if (atomic_dec_and_test(&ifp->refcnt)) 216 inet6_ifa_finish_destroy(ifp); 217} 218 219#define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt) 220#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt) 221 222 223 224/* 225 * compute link-local solicited-node multicast address 226 */ 227 228static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, 229 struct in6_addr *solicited) 230{ 231 ipv6_addr_set(solicited, 232 htonl(0xFF020000), 0, 233 htonl(0x1), 234 htonl(0xFF000000) | addr->s6_addr32[3]); 235} 236 237static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) 238{ 239 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); 240} 241 242static inline int ipv6_addr_is_ll_all_nodes(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(0x00000001))) == 0); 247} 248 249static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) 250{ 251 return (((addr->s6_addr32[0] ^ htonl(0xff020000)) | 252 addr->s6_addr32[1] | addr->s6_addr32[2] | 253 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0); 254} 255 256extern int __ipv6_isatap_ifid(u8 *eui, __be32 addr); 257 258static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) 259{ 260 return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE)); 261} 262 263#ifdef CONFIG_PROC_FS 264extern int if6_proc_init(void); 265extern void if6_proc_exit(void); 266#endif 267 268#endif 269#endif 270