#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 #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> 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_SHIFT	4#define IN6_ADDR_HSIZE		(1 << IN6_ADDR_HSIZE_SHIFT) int addrconf_init(void);void addrconf_cleanup(void); 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); 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)int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);#endif 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,		      unsigned char banned_flags);int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,		    unsigned char 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) */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) */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; /* * identify MLD packets for MLD filter exceptions */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;} 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);  /* Device notifier */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_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;} 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);} 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 bool ipv6_addr_is_multicast(const struct in6_addr *addr){	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);} static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr){#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64	__u64 *p = (__u64 *)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 bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr){#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64	__u64 *p = (__u64 *)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 bool ipv6_addr_is_isatap(const struct in6_addr *addr){	return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);} static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr){#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64	__u64 *p = (__u64 *)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_FSint if6_proc_init(void);void if6_proc_exit(void);#endif #endif