diff options
Diffstat (limited to 'include/net/addrconf.h')
| -rw-r--r-- | include/net/addrconf.h | 396 |
1 files changed, 235 insertions, 161 deletions
diff --git a/include/net/addrconf.h b/include/net/addrconf.h index 496503c0384..f679877bb60 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -1,8 +1,6 @@ #ifndef _ADDRCONF_H #define _ADDRCONF_H -#define RETRANS_TIMER HZ - #define MAX_RTR_SOLICITATIONS 3 #define RTR_SOLICITATION_INTERVAL (4*HZ) @@ -10,13 +8,17 @@ #define TEMP_VALID_LIFETIME (7*86400) #define TEMP_PREFERRED_LIFETIME (86400) -#define REGEN_MAX_RETRY (5) +#define REGEN_MAX_RETRY (3) #define MAX_DESYNC_FACTOR (600) #define ADDR_CHECK_FREQUENCY (120*HZ) #define IPV6_MAX_ADDRESSES 16 +#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1) +#define ADDRCONF_TIMER_FUZZ (HZ / 4) +#define ADDRCONF_TIMER_FUZZ_MAX (HZ) + #include <linux/in.h> #include <linux/in6.h> @@ -44,136 +46,235 @@ struct prefix_info { }; -#ifdef __KERNEL__ - #include <linux/netdevice.h> #include <net/if_inet6.h> #include <net/ipv6.h> -#define IN6_ADDR_HSIZE 16 +#define IN6_ADDR_HSIZE_SHIFT 4 +#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT) -extern int addrconf_init(void); -extern void addrconf_cleanup(void); +int addrconf_init(void); +void addrconf_cleanup(void); -extern int addrconf_add_ifaddr(void __user *arg); -extern int addrconf_del_ifaddr(void __user *arg); -extern int addrconf_set_dstaddr(void __user *arg); +int addrconf_add_ifaddr(struct net *net, void __user *arg); +int addrconf_del_ifaddr(struct net *net, void __user *arg); +int addrconf_set_dstaddr(struct net *net, void __user *arg); -extern int ipv6_chk_addr(struct net *net, - struct in6_addr *addr, - struct net_device *dev, - int strict); +int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, + const 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, - struct in6_addr *addr); +int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr); #endif -extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, - struct in6_addr *addr, - struct net_device *dev, - int strict); - -extern int ipv6_get_saddr(struct dst_entry *dst, - struct in6_addr *daddr, - struct in6_addr *saddr); -extern int ipv6_dev_get_saddr(struct net_device *dev, - struct in6_addr *daddr, - 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, - struct in6_addr *addr); -extern void addrconf_leave_solict(struct inet6_dev *idev, - struct in6_addr *addr); + +bool ipv6_chk_custom_prefix(const struct in6_addr *addr, + const unsigned int prefix_len, + struct net_device *dev); + +int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev); + +struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, + const struct in6_addr *addr, + struct net_device *dev, int strict); + +int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev, + const struct in6_addr *daddr, unsigned int srcprefs, + struct in6_addr *saddr); +int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, + u32 banned_flags); +int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, + u32 banned_flags); +int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2); +void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr); +void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr); + +static inline unsigned long addrconf_timeout_fixup(u32 timeout, + unsigned int 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_rtnl_register(void); -extern u32 ipv6_addr_label(const struct in6_addr *addr, - int type, int ifindex); +int ipv6_addr_label_init(void); +void ipv6_addr_label_cleanup(void); +void ipv6_addr_label_rtnl_register(void); +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, - struct in6_addr *addr); -extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, - struct in6_addr *addr); -extern void ipv6_sock_mc_close(struct sock *sk); -extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr, - struct in6_addr *src_addr); - -extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr); -extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr); -extern int ipv6_dev_mc_dec(struct net_device *dev, 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_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, struct in6_addr *group, - 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); - -extern int ipv6_get_hoplimit(struct net_device *dev); +int ipv6_sock_mc_join(struct sock *sk, int ifindex, + const struct in6_addr *addr); +int ipv6_sock_mc_drop(struct sock *sk, int ifindex, + const struct in6_addr *addr); +void ipv6_sock_mc_close(struct sock *sk); +bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, + const struct in6_addr *src_addr); + +int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); +int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); +int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); +void ipv6_mc_up(struct inet6_dev *idev); +void ipv6_mc_down(struct inet6_dev *idev); +void ipv6_mc_unmap(struct inet6_dev *idev); +void ipv6_mc_remap(struct inet6_dev *idev); +void ipv6_mc_init_dev(struct inet6_dev *idev); +void ipv6_mc_destroy_dev(struct inet6_dev *idev); +void addrconf_dad_failure(struct inet6_ifaddr *ifp); + +bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, + const struct in6_addr *src_addr); + +void ipv6_mc_dad_complete(struct inet6_dev *idev); + +/* A stub used by vxlan module. This is ugly, ideally these + * symbols should be built into the core kernel. + */ +struct ipv6_stub { + int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex, + const struct in6_addr *addr); + int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex, + const struct in6_addr *addr); + int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst, + struct flowi6 *fl6); + void (*udpv6_encap_enable)(void); + void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh, + const struct in6_addr *daddr, + const struct in6_addr *solicited_addr, + bool router, bool solicited, bool override, bool inc_opt); + struct neigh_table *nd_tbl; +}; +extern const struct ipv6_stub *ipv6_stub __read_mostly; /* - * anycast prototypes (anycast.c) + * identify MLD packets for MLD filter exceptions */ -extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr); -extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr); -extern void ipv6_sock_ac_close(struct sock *sk); -extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex); +static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) +{ + struct icmp6hdr *hdr; + + if (nexthdr != IPPROTO_ICMPV6 || + !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) + return false; + + hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); + + switch (hdr->icmp6_type) { + case ICMPV6_MGM_QUERY: + case ICMPV6_MGM_REPORT: + case ICMPV6_MGM_REDUCTION: + case ICMPV6_MLD2_REPORT: + return true; + default: + break; + } + return false; +} -extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr); -extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr); -extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr); +void addrconf_prefix_rcv(struct net_device *dev, + u8 *opt, int len, bool sllao); +/* + * anycast prototypes (anycast.c) + */ +int ipv6_sock_ac_join(struct sock *sk, int ifindex, + const struct in6_addr *addr); +int ipv6_sock_ac_drop(struct sock *sk, int ifindex, + const struct in6_addr *addr); +void ipv6_sock_ac_close(struct sock *sk); + +int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr); +int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); +bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, + const struct in6_addr *addr); +bool ipv6_chk_acast_addr_src(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); - -static inline struct inet6_dev * -__in6_dev_get(struct net_device *dev) +int register_inet6addr_notifier(struct notifier_block *nb); +int unregister_inet6addr_notifier(struct notifier_block *nb); +int inet6addr_notifier_call_chain(unsigned long val, void *v); + +void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, + struct ipv6_devconf *devconf); + +/** + * __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(dev->ip6_ptr); + return rcu_dereference_rtnl(dev->ip6_ptr); } -static inline struct inet6_dev * -in6_dev_get(struct net_device *dev) +/** + * 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 = NULL; + struct inet6_dev *idev; + rcu_read_lock(); - idev = __in6_dev_get(dev); + 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 struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev) +{ + struct inet6_dev *idev = __in6_dev_get(dev); + + return idev ? idev->nd_parms : NULL; +} + +void in6_dev_finish_destroy(struct inet6_dev *idev); -static inline void -in6_dev_put(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); } -#define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt) -#define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt) +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); +void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); static inline void in6_ifa_put(struct inet6_ifaddr *ifp) { @@ -181,31 +282,17 @@ static inline void in6_ifa_put(struct inet6_ifaddr *ifp) inet6_ifa_finish_destroy(ifp); } -#define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt) -#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt) - - -extern void addrconf_forwarding_on(void); -/* - * Hash function taken from net_alias.c - */ - -static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr) -{ - __u32 word; - - /* - * We perform the hash function over the last 64 bits of the address - * This will include the IEEE address token on links that support it. - */ - - word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]); - word ^= (word >> 16); - word ^= (word >> 8); +static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) +{ + atomic_dec(&ifp->refcnt); +} - return ((word ^ (word >> 4)) & 0x0f); +static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) +{ + atomic_inc(&ifp->refcnt); } + /* * compute link-local solicited-node multicast address */ @@ -214,71 +301,58 @@ static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, struct in6_addr *solicited) { ipv6_addr_set(solicited, - __constant_htonl(0xFF020000), 0, - __constant_htonl(0x1), - __constant_htonl(0xFF000000) | addr->s6_addr32[3]); -} - - -static inline void ipv6_addr_all_nodes(struct in6_addr *addr) -{ - ipv6_addr_set(addr, - __constant_htonl(0xFF020000), 0, 0, - __constant_htonl(0x1)); -} - -static inline void ipv6_addr_all_routers(struct in6_addr *addr) -{ - ipv6_addr_set(addr, - __constant_htonl(0xFF020000), 0, 0, - __constant_htonl(0x2)); -} - -static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) -{ - return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000); + htonl(0xFF020000), 0, + htonl(0x1), + htonl(0xFF000000) | addr->s6_addr32[3]); } -static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) +static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) { - return (addr->s6_addr32[0] == htonl(0xff020000) && - addr->s6_addr32[1] == 0 && - addr->s6_addr32[2] == 0 && - addr->s6_addr32[3] == htonl(0x00000001)); +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 + __be64 *p = (__be64 *)addr; + return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL; +#else + return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | + addr->s6_addr32[1] | addr->s6_addr32[2] | + (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; +#endif } -static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) +static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) { - return (addr->s6_addr32[0] == htonl(0xff020000) && - addr->s6_addr32[1] == 0 && - addr->s6_addr32[2] == 0 && - addr->s6_addr32[3] == htonl(0x00000002)); +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 + __be64 *p = (__be64 *)addr; + return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; +#else + return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | + addr->s6_addr32[1] | addr->s6_addr32[2] | + (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; +#endif } -static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr) +static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) { - eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || - ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || - ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || - ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || - ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || - ipv4_is_lbcast(addr)) ? 0x00 : 0x02; - eui[1] = 0; - eui[2] = 0x5E; - eui[3] = 0xFE; - memcpy (eui+4, &addr, 4); - return 0; + return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); } -static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) +static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) { - return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE)); +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 + __be64 *p = (__be64 *)addr; + return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | + ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & + cpu_to_be64(0xffffffffff000000UL))) == 0UL; +#else + return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | + addr->s6_addr32[1] | + (addr->s6_addr32[2] ^ htonl(0x00000001)) | + (addr->s6_addr[12] ^ 0xff)) == 0; +#endif } #ifdef CONFIG_PROC_FS -extern int if6_proc_init(void); -extern void if6_proc_exit(void); +int if6_proc_init(void); +void if6_proc_exit(void); #endif #endif -#endif |