[mirror_ubuntu-eoan-kernel.git] / include / net / addrconf.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ADDRCONF_H
#define _ADDRCONF_H

#define MAX_RTR_SOLICITATIONS		-1		/* unlimited */
#define RTR_SOLICITATION_INTERVAL	(4*HZ)
#define RTR_SOLICITATION_MAX_INTERVAL	(3600*HZ)	/* 1 hour */

#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)

#define ADDRCONF_NOTIFY_PRIORITY	0

#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/ipv6.h>
#include <linux/netdevice.h>
#include <net/if_inet6.h>
#include <net/ipv6.h>

struct in6_validator_info {
	struct in6_addr		i6vi_addr;
	struct inet6_dev	*i6vi_dev;
	struct netlink_ext_ack	*extack;
};

struct ifa6_config {
	const struct in6_addr	*pfx;
	unsigned int		plen;

	const struct in6_addr	*peer_pfx;

	u32			rt_priority;
	u32			ifa_flags;
	u32			preferred_lft;
	u32			valid_lft;
	u16			scope;
};

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);
int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
			    const struct net_device *dev, bool skip_dev_check,
			    int strict, u32 banned_flags);

#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,
		      u32 banned_flags);
int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
		    u32 banned_flags);
bool inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
			  bool match_wildcard);
bool inet_rcv_saddr_any(const struct sock *sk);
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);

void addrconf_add_linklocal(struct inet6_dev *idev,
			    const struct in6_addr *addr, u32 flags);

int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
				 const struct prefix_info *pinfo,
				 struct inet6_dev *in6_dev,
				 const struct in6_addr *addr, int addr_type,
				 u32 addr_flags, bool sllao, bool tokenized,
				 __u32 valid_lft, u32 prefered_lft);

static inline void addrconf_addr_eui48_base(u8 *eui, const char *const addr)
{
	memcpy(eui, addr, 3);
	eui[3] = 0xFF;
	eui[4] = 0xFE;
	memcpy(eui + 5, addr + 3, 3);
}

static inline void addrconf_addr_eui48(u8 *eui, const char *const addr)
{
	addrconf_addr_eui48_base(eui, addr);
	eui[0] ^= 2;
}

static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
{
	if (dev->addr_len != ETH_ALEN)
		return -1;

	/*
	 * The zSeries OSA network cards can be shared among various
	 * OS instances, but the OSA cards have only one MAC address.
	 * This leads to duplicate address conflicts in conjunction
	 * with IPv6 if more than one instance uses the same card.
	 *
	 * The driver for these cards can deliver a unique 16-bit
	 * identifier for each instance sharing the same card.  It is
	 * placed instead of 0xFFFE in the interface identifier.  The
	 * "u" bit of the interface identifier is not inverted in this
	 * case.  Hence the resulting interface identifier has local
	 * scope according to RFC2373.
	 */

	addrconf_addr_eui48_base(eui, dev->dev_addr);

	if (dev->dev_id) {
		eui[3] = (dev->dev_id >> 8) & 0xFF;
		eui[4] = dev->dev_id & 0xFF;
	} else {
		eui[0] ^= 2;
	}

	return 0;
}

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);
int 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)
 */
static inline int ipv6_mc_may_pull(struct sk_buff *skb,
				   unsigned int len)
{
	if (skb_transport_offset(skb) + ipv6_transport_len(skb) < len)
		return -EINVAL;

	return pskb_may_pull(skb, len);
}

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);
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);
int ipv6_mc_check_icmpv6(struct sk_buff *skb);
int ipv6_mc_check_mld(struct sk_buff *skb);
void addrconf_dad_failure(struct sk_buff *skb, 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 net *net, struct sock *sk,
			       struct dst_entry **dst, struct flowi6 *fl6);
	int (*ipv6_route_input)(struct sk_buff *skb);

	struct fib6_table *(*fib6_get_table)(struct net *net, u32 id);
	struct fib6_info *(*fib6_lookup)(struct net *net, int oif,
					 struct flowi6 *fl6, int flags);
	struct fib6_info *(*fib6_table_lookup)(struct net *net,
					      struct fib6_table *table,
					      int oif, struct flowi6 *fl6,
					      int flags);
	struct fib6_info *(*fib6_multipath_select)(const struct net *net,
						   struct fib6_info *f6i,
						   struct flowi6 *fl6, int oif,
						   const struct sk_buff *skb,
						   int strict);
	u32 (*ip6_mtu_from_fib6)(struct fib6_info *f6i, struct in6_addr *daddr,
				 struct in6_addr *saddr);

	void (*udpv6_encap_enable)(void);
	void (*ndisc_send_na)(struct net_device *dev, 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;

/* A stub used by bpf helpers. Similarly ugly as ipv6_stub */
struct ipv6_bpf_stub {
	int (*inet6_bind)(struct sock *sk, struct sockaddr *uaddr, int addr_len,
			  bool force_bind_address_no_port, bool with_lock);
	struct sock *(*udp6_lib_lookup)(struct net *net,
					const struct in6_addr *saddr, __be16 sport,
					const struct in6_addr *daddr, __be16 dport,
					int dif, int sdif, struct udp_table *tbl,
					struct sk_buff *skb);
};
extern const struct ipv6_bpf_stub *ipv6_bpf_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 inet6_dev *idev, const struct in6_addr *addr);
int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
void ipv6_ac_destroy_dev(struct inet6_dev *idev);
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);
int ipv6_anycast_init(void);
void ipv6_anycast_cleanup(void);

/* 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);

int register_inet6addr_validator_notifier(struct notifier_block *nb);
int unregister_inet6addr_validator_notifier(struct notifier_block *nb);
int inet6addr_validator_notifier_call_chain(unsigned long val, void *v);

void inet6_netconf_notify_devconf(struct net *net, int event, 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_safely - get inet6_dev pointer from netdevice
 * @dev: network device
 *
 * This is a safer version of __in6_dev_get
 */
static inline struct inet6_dev *__in6_dev_get_safely(const struct net_device *dev)
{
	if (likely(dev))
		return rcu_dereference_rtnl(dev->ip6_ptr);
	else
		return NULL;
}

/**
 * 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)
		refcount_inc(&idev->refcnt);
	rcu_read_unlock();
	return 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)
{
	if (refcount_dec_and_test(&idev->refcnt))
		in6_dev_finish_destroy(idev);
}

static inline void in6_dev_put_clear(struct inet6_dev **pidev)
{
	struct inet6_dev *idev = *pidev;

	if (idev) {
		in6_dev_put(idev);
		*pidev = NULL;
	}
}

static inline void __in6_dev_put(struct inet6_dev *idev)
{
	refcount_dec(&idev->refcnt);
}

static inline void in6_dev_hold(struct inet6_dev *idev)
{
	refcount_inc(&idev->refcnt);
}

void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);

static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
{
	if (refcount_dec_and_test(&ifp->refcnt))
		inet6_ifa_finish_destroy(ifp);
}

static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
{
	refcount_dec(&ifp->refcnt);
}

static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
{
	refcount_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_ll_all_nodes(const struct in6_addr *addr)
{
#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 bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
{
#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 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
	__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
}

static inline bool ipv6_addr_is_all_snoopers(const struct in6_addr *addr)
{
#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(0x6a))) == 0UL;
#else
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x0000006a))) == 0;
#endif
}

#ifdef CONFIG_PROC_FS
int if6_proc_init(void);
void if6_proc_exit(void);
#endif

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _ADDRCONF_H
	3	#define _ADDRCONF_H
	4
bd11f074	5	#define MAX_RTR_SOLICITATIONS -1 /* unlimited */
1da177e4	6	#define RTR_SOLICITATION_INTERVAL (4*HZ)
bd11f074	7	#define RTR_SOLICITATION_MAX_INTERVAL (3600HZ) / 1 hour */
1da177e4 LT	8
	9	#define MIN_VALID_LIFETIME (23600) / 2 hours */
	10
	11	#define TEMP_VALID_LIFETIME (7*86400)
	12	#define TEMP_PREFERRED_LIFETIME (86400)
76f793e3	13	#define REGEN_MAX_RETRY (3)
1da177e4 LT	14	#define MAX_DESYNC_FACTOR (600)
	15
	16	#define ADDR_CHECK_FREQUENCY (120*HZ)
	17
	18	#define IPV6_MAX_ADDRESSES 16
	19
5c766d64 JP	20	#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)
	21	#define ADDRCONF_TIMER_FUZZ (HZ / 4)
	22	#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
	23
242d3a49 WC	24	#define ADDRCONF_NOTIFY_PRIORITY 0
242d3a49 WC	25
c7dc89c0	26	#include <linux/in.h>
6a800d45 PM	27	#include <linux/in6.h>
6a800d45 PM	28
1da177e4 LT	29	struct prefix_info {
	30	__u8 type;
	31	__u8 length;
	32	__u8 prefix_len;
	33
	34	#if defined(__BIG_ENDIAN_BITFIELD)
	35	__u8 onlink : 1,
	36	autoconf : 1,
	37	reserved : 6;
	38	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	39	__u8 reserved : 6,
	40	autoconf : 1,
	41	onlink : 1;
	42	#else
	43	#error "Please fix <asm/byteorder.h>"
	44	#endif
e69a4adc AV	45	__be32 valid;
	46	__be32 prefered;
	47	__be32 reserved2;
1da177e4 LT	48
	49	struct in6_addr prefix;
	50	};
	51
ba5ea614	52	#include <linux/ipv6.h>
1da177e4 LT	53	#include <linux/netdevice.h>
1da177e4 LT	54	#include <net/if_inet6.h>
e4553edd	55	#include <net/ipv6.h>
1da177e4	56
3ad7d246 KJ	57	struct in6_validator_info {
	58	struct in6_addr i6vi_addr;
	59	struct inet6_dev *i6vi_dev;
de95e047	60	struct netlink_ext_ack *extack;
3ad7d246 KJ	61	};
3ad7d246 KJ	62
e6464b8c DA	63	struct ifa6_config {
	64	const struct in6_addr *pfx;
	65	unsigned int plen;
	66
	67	const struct in6_addr *peer_pfx;
	68
8308f3ff	69	u32 rt_priority;
e6464b8c DA	70	u32 ifa_flags;
	71	u32 preferred_lft;
	72	u32 valid_lft;
	73	u16 scope;
	74	};
	75
e8e54d3c JP	76	int addrconf_init(void);
e8e54d3c JP	77	void addrconf_cleanup(void);
1da177e4	78
e8e54d3c JP	79	int addrconf_add_ifaddr(struct net net, void __user arg);
	80	int addrconf_del_ifaddr(struct net net, void __user arg);
	81	int addrconf_set_dstaddr(struct net net, void __user arg);
1da177e4	82
e8e54d3c JP	83	int ipv6_chk_addr(struct net net, const struct in6_addr addr,
e8e54d3c JP	84	const struct net_device *dev, int strict);
c58da4c6	85	int ipv6_chk_addr_and_flags(struct net net, const struct in6_addr addr,
232378e8 DA	86	const struct net_device *dev, bool skip_dev_check,
232378e8 DA	87	int strict, u32 banned_flags);
bfeade08	88
59fbb3a6	89	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
e8e54d3c	90	int ipv6_chk_home_addr(struct net net, const struct in6_addr addr);
65d4ed92	91	#endif
52eeeb84	92
7df37ff3 CB	93	bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
	94	const unsigned int prefix_len,
	95	struct net_device *dev);
	96
e8e54d3c JP	97	int ipv6_chk_prefix(const struct in6_addr addr, struct net_device dev);
	98
	99	struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
	100	const struct in6_addr *addr,
	101	struct net_device *dev, int strict);
	102
	103	int ipv6_dev_get_saddr(struct net net, const struct net_device dev,
	104	const struct in6_addr *daddr, unsigned int srcprefs,
	105	struct in6_addr *saddr);
	106	int __ipv6_get_lladdr(struct inet6_dev idev, struct in6_addr addr,
479840ff	107	u32 banned_flags);
e8e54d3c	108	int ipv6_get_lladdr(struct net_device dev, struct in6_addr addr,
479840ff	109	u32 banned_flags);
7016e062 JP	110	bool inet_rcv_saddr_equal(const struct sock sk, const struct sock sk2,
7016e062 JP	111	bool match_wildcard);
2dbb9b9e	112	bool inet_rcv_saddr_any(const struct sock *sk);
e8e54d3c JP	113	void addrconf_join_solict(struct net_device dev, const struct in6_addr addr);
e8e54d3c JP	114	void addrconf_leave_solict(struct inet6_dev idev, const struct in6_addr addr);
1da177e4	115
2ad3ed59 AA	116	void addrconf_add_linklocal(struct inet6_dev *idev,
	117	const struct in6_addr *addr, u32 flags);
	118
cc84b3c6 AA	119	int addrconf_prefix_rcv_add_addr(struct net net, struct net_device dev,
	120	const struct prefix_info *pinfo,
	121	struct inet6_dev *in6_dev,
	122	const struct in6_addr *addr, int addr_type,
	123	u32 addr_flags, bool sllao, bool tokenized,
	124	__u32 valid_lft, u32 prefered_lft);
	125
4d6f2859 YS	126	static inline void addrconf_addr_eui48_base(u8 eui, const char const addr)
	127	{
	128	memcpy(eui, addr, 3);
	129	eui[3] = 0xFF;
	130	eui[4] = 0xFE;
	131	memcpy(eui + 5, addr + 3, 3);
	132	}
	133
	134	static inline void addrconf_addr_eui48(u8 eui, const char const addr)
	135	{
	136	addrconf_addr_eui48_base(eui, addr);
	137	eui[0] ^= 2;
	138	}
	139
399e6f95 MB	140	static inline int addrconf_ifid_eui48(u8 eui, struct net_device dev)
	141	{
	142	if (dev->addr_len != ETH_ALEN)
	143	return -1;
399e6f95 MB	144
	145	/*
	146	* The zSeries OSA network cards can be shared among various
	147	* OS instances, but the OSA cards have only one MAC address.
	148	* This leads to duplicate address conflicts in conjunction
	149	* with IPv6 if more than one instance uses the same card.
	150	*
	151	* The driver for these cards can deliver a unique 16-bit
	152	* identifier for each instance sharing the same card. It is
	153	* placed instead of 0xFFFE in the interface identifier. The
	154	* "u" bit of the interface identifier is not inverted in this
	155	* case. Hence the resulting interface identifier has local
	156	* scope according to RFC2373.
	157	*/
4d6f2859 YS	158
	159	addrconf_addr_eui48_base(eui, dev->dev_addr);
	160
399e6f95 MB	161	if (dev->dev_id) {
	162	eui[3] = (dev->dev_id >> 8) & 0xFF;
	163	eui[4] = dev->dev_id & 0xFF;
	164	} else {
399e6f95 MB	165	eui[0] ^= 2;
399e6f95 MB	166	}
4d6f2859	167
399e6f95 MB	168	return 0;
	169	}
	170
4bed72e4	171	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	172	unsigned int unit)
4bed72e4 YH	173	{
	174	if (timeout == 0xffffffff)
	175	return ~0UL;
	176
	177	/*
	178	* Avoid arithmetic overflow.
	179	* Assuming unit is constant and non-zero, this "if" statement
	180	* will go away on 64bit archs.
	181	*/
	182	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	183	return LONG_MAX / unit;
	184
	185	return timeout;
	186	}
	187
	188	static inline int addrconf_finite_timeout(unsigned long timeout)
	189	{
	190	return ~timeout;
	191	}
	192
2a8cc6c8 YH	193	/*
	194	* IPv6 Address Label subsystem (addrlabel.c)
	195	*/
e8e54d3c JP	196	int ipv6_addr_label_init(void);
e8e54d3c JP	197	void ipv6_addr_label_cleanup(void);
a3fde2ad	198	int ipv6_addr_label_rtnl_register(void);
e8e54d3c JP	199	u32 ipv6_addr_label(struct net net, const struct in6_addr addr,
e8e54d3c JP	200	int type, int ifindex);
2a8cc6c8	201
1da177e4 LT	202	/*
	203	* multicast prototypes (mcast.c)
	204	*/
ba5ea614 LL	205	static inline int ipv6_mc_may_pull(struct sk_buff *skb,
	206	unsigned int len)
	207	{
	208	if (skb_transport_offset(skb) + ipv6_transport_len(skb) < len)
	209	return -EINVAL;
	210
	211	return pskb_may_pull(skb, len);
	212	}
	213
e8e54d3c JP	214	int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	215	const struct in6_addr *addr);
	216	int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	217	const struct in6_addr *addr);
8651be8f	218	void __ipv6_sock_mc_close(struct sock *sk);
e8e54d3c JP	219	void ipv6_sock_mc_close(struct sock *sk);
	220	bool inet6_mc_check(struct sock sk, const struct in6_addr mc_addr,
	221	const struct in6_addr *src_addr);
	222
	223	int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	224	int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	225	int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
	226	void ipv6_mc_up(struct inet6_dev *idev);
	227	void ipv6_mc_down(struct inet6_dev *idev);
	228	void ipv6_mc_unmap(struct inet6_dev *idev);
	229	void ipv6_mc_remap(struct inet6_dev *idev);
	230	void ipv6_mc_init_dev(struct inet6_dev *idev);
	231	void ipv6_mc_destroy_dev(struct inet6_dev *idev);
4b3087c7	232	int ipv6_mc_check_icmpv6(struct sk_buff *skb);
ba5ea614	233	int ipv6_mc_check_mld(struct sk_buff *skb);
da13c59b	234	void addrconf_dad_failure(struct sk_buff skb, struct inet6_ifaddr ifp);
e8e54d3c JP	235
	236	bool ipv6_chk_mcast_addr(struct net_device dev, const struct in6_addr group,
	237	const struct in6_addr *src_addr);
	238
	239	void ipv6_mc_dad_complete(struct inet6_dev *idev);
5f81bd2e CW	240
	241	/* A stub used by vxlan module. This is ugly, ideally these
	242	* symbols should be built into the core kernel.
	243	*/
	244	struct ipv6_stub {
	245	int (ipv6_sock_mc_join)(struct sock sk, int ifindex,
	246	const struct in6_addr *addr);
	247	int (ipv6_sock_mc_drop)(struct sock sk, int ifindex,
	248	const struct in6_addr *addr);
343d60aa RP	249	int (ipv6_dst_lookup)(struct net net, struct sock *sk,
343d60aa RP	250	struct dst_entry *dst, struct flowi6 fl6);
9b0a6a9d	251	int (ipv6_route_input)(struct sk_buff skb);
65a2022e DA	252
	253	struct fib6_table (fib6_get_table)(struct net *net, u32 id);
	254	struct fib6_info (fib6_lookup)(struct net *net, int oif,
	255	struct flowi6 *fl6, int flags);
	256	struct fib6_info (fib6_table_lookup)(struct net *net,
	257	struct fib6_table *table,
	258	int oif, struct flowi6 *fl6,
	259	int flags);
	260	struct fib6_info (fib6_multipath_select)(const struct net *net,
	261	struct fib6_info *f6i,
	262	struct flowi6 *fl6, int oif,
	263	const struct sk_buff *skb,
	264	int strict);
901731b8 DA	265	u32 (ip6_mtu_from_fib6)(struct fib6_info f6i, struct in6_addr *daddr,
901731b8 DA	266	struct in6_addr *saddr);
65a2022e	267
5f81bd2e	268	void (*udpv6_encap_enable)(void);
38cf595b	269	void (ndisc_send_na)(struct net_device dev, const struct in6_addr *daddr,
f564f45c CW	270	const struct in6_addr *solicited_addr,
f564f45c CW	271	bool router, bool solicited, bool override, bool inc_opt);
e15a00aa	272	struct neigh_table *nd_tbl;
5f81bd2e CW	273	};
	274	extern const struct ipv6_stub *ipv6_stub __read_mostly;
	275
d74bad4e AI	276	/* A stub used by bpf helpers. Similarly ugly as ipv6_stub */
	277	struct ipv6_bpf_stub {
	278	int (inet6_bind)(struct sock sk, struct sockaddr *uaddr, int addr_len,
	279	bool force_bind_address_no_port, bool with_lock);
8a615c6b JS	280	struct sock (udp6_lib_lookup)(struct net *net,
	281	const struct in6_addr *saddr, __be16 sport,
	282	const struct in6_addr *daddr, __be16 dport,
	283	int dif, int sdif, struct udp_table *tbl,
	284	struct sk_buff *skb);
d74bad4e AI	285	};
	286	extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly;
	287
daad1512 YH	288	/*
	289	* identify MLD packets for MLD filter exceptions
	290	*/
	291	static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
	292	{
	293	struct icmp6hdr *hdr;
	294
	295	if (nexthdr != IPPROTO_ICMPV6 \|\|
	296	!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
	297	return false;
	298
	299	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
	300
	301	switch (hdr->icmp6_type) {
	302	case ICMPV6_MGM_QUERY:
	303	case ICMPV6_MGM_REPORT:
	304	case ICMPV6_MGM_REDUCTION:
	305	case ICMPV6_MLD2_REPORT:
	306	return true;
	307	default:
	308	break;
	309	}
	310	return false;
	311	}
1da177e4	312
e8e54d3c JP	313	void addrconf_prefix_rcv(struct net_device *dev,
e8e54d3c JP	314	u8 *opt, int len, bool sllao);
1da177e4	315
1da177e4 LT	316	/*
	317	* anycast prototypes (anycast.c)
	318	*/
e8e54d3c JP	319	int ipv6_sock_ac_join(struct sock *sk, int ifindex,
	320	const struct in6_addr *addr);
	321	int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
	322	const struct in6_addr *addr);
	323	void ipv6_sock_ac_close(struct sock *sk);
	324
013b4d90	325	int __ipv6_dev_ac_inc(struct inet6_dev idev, const struct in6_addr addr);
e8e54d3c	326	int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
381f4dca	327	void ipv6_ac_destroy_dev(struct inet6_dev *idev);
e8e54d3c	328	bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
7c90cc2d FLB	329	const struct in6_addr *addr);
	330	bool ipv6_chk_acast_addr_src(struct net net, struct net_device dev,
	331	const struct in6_addr *addr);
2384d025 JB	332	int ipv6_anycast_init(void);
2384d025 JB	333	void ipv6_anycast_cleanup(void);
1da177e4 LT	334
1da177e4 LT	335	/* Device notifier */
e8e54d3c JP	336	int register_inet6addr_notifier(struct notifier_block *nb);
	337	int unregister_inet6addr_notifier(struct notifier_block *nb);
	338	int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4	339
3ad7d246 KJ	340	int register_inet6addr_validator_notifier(struct notifier_block *nb);
	341	int unregister_inet6addr_validator_notifier(struct notifier_block *nb);
	342	int inet6addr_validator_notifier_call_chain(unsigned long val, void *v);
	343
85b3daad DA	344	void inet6_netconf_notify_devconf(struct net *net, int event, int type,
85b3daad DA	345	int ifindex, struct ipv6_devconf *devconf);
d67b8c61	346
48daa3bb ED	347	/**
	348	* __in6_dev_get - get inet6_dev pointer from netdevice
	349	* @dev: network device
	350	*
	351	* Caller must hold rcu_read_lock or RTNL, because this function
	352	* does not take a reference on the inet6_dev.
	353	*/
	354	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	355	{
48daa3bb	356	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	357	}
1da177e4 LT	358
bdb7cc64 SS	359	/**
	360	* __in6_dev_get_safely - get inet6_dev pointer from netdevice
	361	* @dev: network device
	362	*
	363	* This is a safer version of __in6_dev_get
	364	*/
	365	static inline struct inet6_dev __in6_dev_get_safely(const struct net_device dev)
	366	{
	367	if (likely(dev))
	368	return rcu_dereference_rtnl(dev->ip6_ptr);
	369	else
	370	return NULL;
	371	}
	372
48daa3bb ED	373	/**
	374	* in6_dev_get - get inet6_dev pointer from netdevice
	375	* @dev: network device
	376	*
	377	* This version can be used in any context, and takes a reference
	378	* on the inet6_dev. Callers must use in6_dev_put() later to
	379	* release this reference.
	380	*/
	381	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	382	{
48daa3bb ED	383	struct inet6_dev *idev;
48daa3bb ED	384
8814c4b5	385	rcu_read_lock();
48daa3bb	386	idev = rcu_dereference(dev->ip6_ptr);
1da177e4	387	if (idev)
1be92460	388	refcount_inc(&idev->refcnt);
8814c4b5	389	rcu_read_unlock();
1da177e4 LT	390	return idev;
	391	}
	392
bba24896 JP	393	static inline struct neigh_parms __in6_dev_nd_parms_get_rcu(const struct net_device dev)
	394	{
	395	struct inet6_dev *idev = __in6_dev_get(dev);
	396
	397	return idev ? idev->nd_parms : NULL;
	398	}
	399
e8e54d3c	400	void in6_dev_finish_destroy(struct inet6_dev *idev);
1da177e4	401
48daa3bb	402	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4	403	{
1be92460	404	if (refcount_dec_and_test(&idev->refcnt))
1da177e4 LT	405	in6_dev_finish_destroy(idev);
	406	}
	407
12d94a80 ED	408	static inline void in6_dev_put_clear(struct inet6_dev **pidev)
	409	{
	410	struct inet6_dev idev = pidev;
	411
	412	if (idev) {
	413	in6_dev_put(idev);
	414	*pidev = NULL;
	415	}
	416	}
	417
48daa3bb ED	418	static inline void __in6_dev_put(struct inet6_dev *idev)
48daa3bb ED	419	{
1be92460	420	refcount_dec(&idev->refcnt);
48daa3bb	421	}
1da177e4	422
48daa3bb ED	423	static inline void in6_dev_hold(struct inet6_dev *idev)
48daa3bb ED	424	{
1be92460	425	refcount_inc(&idev->refcnt);
48daa3bb	426	}
1da177e4	427
e8e54d3c	428	void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
1da177e4 LT	429
	430	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	431	{
271201c0	432	if (refcount_dec_and_test(&ifp->refcnt))
1da177e4 LT	433	inet6_ifa_finish_destroy(ifp);
	434	}
	435
48daa3bb ED	436	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
48daa3bb ED	437	{
271201c0	438	refcount_dec(&ifp->refcnt);
48daa3bb	439	}
1da177e4	440
48daa3bb ED	441	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
48daa3bb ED	442	{
271201c0	443	refcount_inc(&ifp->refcnt);
48daa3bb	444	}
1da177e4	445
1da177e4 LT	446
	447	/*
	448	* compute link-local solicited-node multicast address
	449	*/
	450
	451	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	452	struct in6_addr *solicited)
	453	{
	454	ipv6_addr_set(solicited,
0e7b8dcd YH	455	htonl(0xFF020000), 0,
	456	htonl(0x1),
	457	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	458	}
1da177e4 LT	459
b27b28cb	460	static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4	461	{
d1641565	462	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	463	__be64 p = (__be64 )addr;
d1641565 YH	464	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(1))) == 0UL;
d1641565 YH	465	#else
48daa3bb	466	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	467	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	468	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565	469	#endif
1da177e4 LT	470	}
1da177e4 LT	471
b27b28cb	472	static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4	473	{
d1641565	474	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	475	__be64 p = (__be64 )addr;
d1641565 YH	476	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(2))) == 0UL;
d1641565 YH	477	#else
48daa3bb	478	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	479	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	480	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565	481	#endif
1da177e4 LT	482	}
1da177e4 LT	483
b27b28cb	484	static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0	485	{
48daa3bb	486	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	487	}
c7dc89c0 FT	488
ca97a644 YH	489	static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
ca97a644 YH	490	{
9d100774	491	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	492	__be64 p = (__be64 )addr;
9d100774 YH	493	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	494	((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
	495	cpu_to_be64(0xffffffffff000000UL))) == 0UL;
	496	#else
	497	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	498	addr->s6_addr32[1] \|
	499	(addr->s6_addr32[2] ^ htonl(0x00000001)) \|
	500	(addr->s6_addr[12] ^ 0xff)) == 0;
	501	#endif
ca97a644 YH	502	}
ca97a644 YH	503
4b3087c7 LL	504	static inline bool ipv6_addr_is_all_snoopers(const struct in6_addr *addr)
	505	{
	506	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	507	__be64 p = (__be64 )addr;
	508
	509	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	510	(p[1] ^ cpu_to_be64(0x6a))) == 0UL;
	511	#else
	512	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	513	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
	514	(addr->s6_addr32[3] ^ htonl(0x0000006a))) == 0;
	515	#endif
	516	}
	517
20380731	518	#ifdef CONFIG_PROC_FS
e8e54d3c JP	519	int if6_proc_init(void);
e8e54d3c JP	520	void if6_proc_exit(void);
20380731 ACM	521	#endif
20380731 ACM	522
1da177e4	523	#endif