diff options
Diffstat (limited to 'include/net/addrconf.h')
| -rw-r--r-- | include/net/addrconf.h | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/include/net/addrconf.h b/include/net/addrconf.h new file mode 100644 index 00000000..cbc6bb0a --- /dev/null +++ b/include/net/addrconf.h @@ -0,0 +1,285 @@ +#ifndef _ADDRCONF_H +#define _ADDRCONF_H + +#define MAX_RTR_SOLICITATIONS 3 +#define RTR_SOLICITATION_INTERVAL (4*HZ) + +#define MIN_VALID_LIFETIME (2*3600) /* 2 hours */ + +#define TEMP_VALID_LIFETIME (7*86400) +#define TEMP_PREFERRED_LIFETIME (86400) +#define REGEN_MAX_RETRY (3) +#define MAX_DESYNC_FACTOR (600) + +#define ADDR_CHECK_FREQUENCY (120*HZ) + +#define IPV6_MAX_ADDRESSES 16 + +#include <linux/in.h> +#include <linux/in6.h> + +struct prefix_info { + __u8 type; + __u8 length; + __u8 prefix_len; + +#if defined(__BIG_ENDIAN_BITFIELD) + __u8 onlink : 1, + autoconf : 1, + reserved : 6; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + __u8 reserved : 6, + autoconf : 1, + onlink : 1; +#else +#error "Please fix <asm/byteorder.h>" +#endif + __be32 valid; + __be32 prefered; + __be32 reserved2; + + struct in6_addr prefix; +}; + + +#include <linux/netdevice.h> +#include <net/if_inet6.h> +#include <net/ipv6.h> + +#define IN6_ADDR_HSIZE 16 + +extern int addrconf_init(void); +extern void addrconf_cleanup(void); + +extern int addrconf_add_ifaddr(struct net *net, + void __user *arg); +extern int addrconf_del_ifaddr(struct net *net, + void __user *arg); +extern int addrconf_set_dstaddr(struct net *net, + void __user *arg); + +extern int ipv6_chk_addr(struct net *net, + const struct in6_addr *addr, + struct net_device *dev, + int strict); + +#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) +extern int ipv6_chk_home_addr(struct net *net, + const struct in6_addr *addr); +#endif + +extern int ipv6_chk_prefix(const struct in6_addr *addr, + struct net_device *dev); + +extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, + const struct in6_addr *addr, + struct net_device *dev, + int strict); + +extern int ipv6_dev_get_saddr(struct net *net, + struct net_device *dev, + const struct in6_addr *daddr, + unsigned int srcprefs, + struct in6_addr *saddr); +extern int ipv6_get_lladdr(struct net_device *dev, + struct in6_addr *addr, + unsigned char banned_flags); +extern int ipv6_rcv_saddr_equal(const struct sock *sk, + const struct sock *sk2); +extern void addrconf_join_solict(struct net_device *dev, + const struct in6_addr *addr); +extern void addrconf_leave_solict(struct inet6_dev *idev, + const struct in6_addr *addr); + +static inline unsigned long addrconf_timeout_fixup(u32 timeout, + unsigned unit) +{ + if (timeout == 0xffffffff) + return ~0UL; + + /* + * Avoid arithmetic overflow. + * Assuming unit is constant and non-zero, this "if" statement + * will go away on 64bit archs. + */ + if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) + return LONG_MAX / unit; + + return timeout; +} + +static inline int addrconf_finite_timeout(unsigned long timeout) +{ + return ~timeout; +} + +/* + * IPv6 Address Label subsystem (addrlabel.c) + */ +extern int ipv6_addr_label_init(void); +extern void ipv6_addr_label_cleanup(void); +extern void ipv6_addr_label_rtnl_register(void); +extern u32 ipv6_addr_label(struct net *net, + const struct in6_addr *addr, + int type, int ifindex); + +/* + * multicast prototypes (mcast.c) + */ +extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, + const struct in6_addr *addr); +extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, + const struct in6_addr *addr); +extern void ipv6_sock_mc_close(struct sock *sk); +extern int inet6_mc_check(struct sock *sk, + const struct in6_addr *mc_addr, + const struct in6_addr *src_addr); + +extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); +extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); +extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); +extern void ipv6_mc_up(struct inet6_dev *idev); +extern void ipv6_mc_down(struct inet6_dev *idev); +extern void ipv6_mc_unmap(struct inet6_dev *idev); +extern void ipv6_mc_remap(struct inet6_dev *idev); +extern void ipv6_mc_init_dev(struct inet6_dev *idev); +extern void ipv6_mc_destroy_dev(struct inet6_dev *idev); +extern void addrconf_dad_failure(struct inet6_ifaddr *ifp); + +extern int ipv6_chk_mcast_addr(struct net_device *dev, + const struct in6_addr *group, + const struct in6_addr *src_addr); +extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr); + +extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len); + +/* + * anycast prototypes (anycast.c) + */ +extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr); +extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr); +extern void ipv6_sock_ac_close(struct sock *sk); +extern int inet6_ac_check(struct sock *sk, const struct in6_addr *addr, int ifindex); + +extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr); +extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); +extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev, + const struct in6_addr *addr); + + +/* Device notifier */ +extern int register_inet6addr_notifier(struct notifier_block *nb); +extern int unregister_inet6addr_notifier(struct notifier_block *nb); + +/** + * __in6_dev_get - get inet6_dev pointer from netdevice + * @dev: network device + * + * Caller must hold rcu_read_lock or RTNL, because this function + * does not take a reference on the inet6_dev. + */ +static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) +{ + return rcu_dereference_rtnl(dev->ip6_ptr); +} + +/** + * in6_dev_get - get inet6_dev pointer from netdevice + * @dev: network device + * + * This version can be used in any context, and takes a reference + * on the inet6_dev. Callers must use in6_dev_put() later to + * release this reference. + */ +static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) +{ + struct inet6_dev *idev; + + rcu_read_lock(); + idev = rcu_dereference(dev->ip6_ptr); + if (idev) + atomic_inc(&idev->refcnt); + rcu_read_unlock(); + return idev; +} + +extern void in6_dev_finish_destroy(struct inet6_dev *idev); + +static inline void in6_dev_put(struct inet6_dev *idev) +{ + if (atomic_dec_and_test(&idev->refcnt)) + in6_dev_finish_destroy(idev); +} + +static inline void __in6_dev_put(struct inet6_dev *idev) +{ + atomic_dec(&idev->refcnt); +} + +static inline void in6_dev_hold(struct inet6_dev *idev) +{ + atomic_inc(&idev->refcnt); +} + +extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); + +static inline void in6_ifa_put(struct inet6_ifaddr *ifp) +{ + if (atomic_dec_and_test(&ifp->refcnt)) + inet6_ifa_finish_destroy(ifp); +} + +static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) +{ + atomic_dec(&ifp->refcnt); +} + +static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) +{ + atomic_inc(&ifp->refcnt); +} + + +/* + * compute link-local solicited-node multicast address + */ + +static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, + struct in6_addr *solicited) +{ + ipv6_addr_set(solicited, + htonl(0xFF020000), 0, + htonl(0x1), + htonl(0xFF000000) | addr->s6_addr32[3]); +} + +static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) +{ + return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); +} + +static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) +{ + return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | + addr->s6_addr32[1] | addr->s6_addr32[2] | + (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; +} + +static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) +{ + return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | + addr->s6_addr32[1] | addr->s6_addr32[2] | + (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; +} + +static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) +{ + return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); +} + +#ifdef CONFIG_PROC_FS +extern int if6_proc_init(void); +extern void if6_proc_exit(void); +#endif + +#endif |