[mirror_ubuntu-bionic-kernel.git] / include / linux / ipv6.h

#ifndef _IPV6_H
#define _IPV6_H

#include <linux/types.h>
#include <linux/in6.h>
#include <asm/byteorder.h>

/* The latest drafts declared increase in minimal mtu up to 1280. */

#define IPV6_MIN_MTU	1280

/*
 *	Advanced API
 *	source interface/address selection, source routing, etc...
 *	*under construction*
 */


struct in6_pktinfo {
	struct in6_addr	ipi6_addr;
	int		ipi6_ifindex;
};

struct ip6_mtuinfo {
	struct sockaddr_in6	ip6m_addr;
	__u32			ip6m_mtu;
};

struct in6_ifreq {
	struct in6_addr	ifr6_addr;
	__u32		ifr6_prefixlen;
	int		ifr6_ifindex; 
};

#define IPV6_SRCRT_STRICT	0x01	/* Deprecated; will be removed */
#define IPV6_SRCRT_TYPE_0	0	/* Deprecated; will be removed */
#define IPV6_SRCRT_TYPE_2	2	/* IPv6 type 2 Routing Header	*/

/*
 *	routing header
 */
struct ipv6_rt_hdr {
	__u8		nexthdr;
	__u8		hdrlen;
	__u8		type;
	__u8		segments_left;

	/*
	 *	type specific data
	 *	variable length field
	 */
};


struct ipv6_opt_hdr {
	__u8 		nexthdr;
	__u8 		hdrlen;
	/* 
	 * TLV encoded option data follows.
	 */
} __attribute__((packed));	/* required for some archs */

#define ipv6_destopt_hdr ipv6_opt_hdr
#define ipv6_hopopt_hdr  ipv6_opt_hdr

#ifdef __KERNEL__
#define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)
#endif

/*
 *	routing header type 0 (used in cmsghdr struct)
 */

struct rt0_hdr {
	struct ipv6_rt_hdr	rt_hdr;
	__u32			reserved;
	struct in6_addr		addr[0];

#define rt0_type		rt_hdr.type
};

/*
 *	routing header type 2
 */

struct rt2_hdr {
	struct ipv6_rt_hdr	rt_hdr;
	__u32			reserved;
	struct in6_addr		addr;

#define rt2_type		rt_hdr.type
};

/*
 *	home address option in destination options header
 */

struct ipv6_destopt_hao {
	__u8			type;
	__u8			length;
	struct in6_addr		addr;
} __attribute__((packed));

/*
 *	IPv6 fixed header
 *
 *	BEWARE, it is incorrect. The first 4 bits of flow_lbl
 *	are glued to priority now, forming "class".
 */

struct ipv6hdr {
#if defined(__LITTLE_ENDIAN_BITFIELD)
	__u8			priority:4,
				version:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
	__u8			version:4,
				priority:4;
#else
#error	"Please fix <asm/byteorder.h>"
#endif
	__u8			flow_lbl[3];

	__be16			payload_len;
	__u8			nexthdr;
	__u8			hop_limit;

	struct	in6_addr	saddr;
	struct	in6_addr	daddr;
};

#ifdef __KERNEL__
/*
 * This structure contains configuration options per IPv6 link.
 */
struct ipv6_devconf {
	__s32		forwarding;
	__s32		hop_limit;
	__s32		mtu6;
	__s32		accept_ra;
	__s32		accept_redirects;
	__s32		autoconf;
	__s32		dad_transmits;
	__s32		rtr_solicits;
	__s32		rtr_solicit_interval;
	__s32		rtr_solicit_delay;
	__s32		force_mld_version;
#ifdef CONFIG_IPV6_PRIVACY
	__s32		use_tempaddr;
	__s32		temp_valid_lft;
	__s32		temp_prefered_lft;
	__s32		regen_max_retry;
	__s32		max_desync_factor;
#endif
	__s32		max_addresses;
	__s32		accept_ra_defrtr;
	__s32		accept_ra_pinfo;
#ifdef CONFIG_IPV6_ROUTER_PREF
	__s32		accept_ra_rtr_pref;
	__s32		rtr_probe_interval;
#ifdef CONFIG_IPV6_ROUTE_INFO
	__s32		accept_ra_rt_info_max_plen;
#endif
#endif
	__s32		proxy_ndp;
	__s32		accept_source_route;
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	__s32		optimistic_dad;
#endif
#ifdef CONFIG_IPV6_MROUTE
	__s32		mc_forwarding;
#endif
	__s32		disable_ipv6;
	__s32		accept_dad;
	__s32		force_tllao;
	void		*sysctl;
};

struct ipv6_params {
	__s32 disable_ipv6;
	__s32 autoconf;
};
extern struct ipv6_params ipv6_defaults;
#endif

/* index values for the variables in ipv6_devconf */
enum {
	DEVCONF_FORWARDING = 0,
	DEVCONF_HOPLIMIT,
	DEVCONF_MTU6,
	DEVCONF_ACCEPT_RA,
	DEVCONF_ACCEPT_REDIRECTS,
	DEVCONF_AUTOCONF,
	DEVCONF_DAD_TRANSMITS,
	DEVCONF_RTR_SOLICITS,
	DEVCONF_RTR_SOLICIT_INTERVAL,
	DEVCONF_RTR_SOLICIT_DELAY,
	DEVCONF_USE_TEMPADDR,
	DEVCONF_TEMP_VALID_LFT,
	DEVCONF_TEMP_PREFERED_LFT,
	DEVCONF_REGEN_MAX_RETRY,
	DEVCONF_MAX_DESYNC_FACTOR,
	DEVCONF_MAX_ADDRESSES,
	DEVCONF_FORCE_MLD_VERSION,
	DEVCONF_ACCEPT_RA_DEFRTR,
	DEVCONF_ACCEPT_RA_PINFO,
	DEVCONF_ACCEPT_RA_RTR_PREF,
	DEVCONF_RTR_PROBE_INTERVAL,
	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
	DEVCONF_PROXY_NDP,
	DEVCONF_OPTIMISTIC_DAD,
	DEVCONF_ACCEPT_SOURCE_ROUTE,
	DEVCONF_MC_FORWARDING,
	DEVCONF_DISABLE_IPV6,
	DEVCONF_ACCEPT_DAD,
	DEVCONF_FORCE_TLLAO,
	DEVCONF_MAX
};

#ifdef __KERNEL__
#include <linux/icmpv6.h>
#include <linux/tcp.h>
#include <linux/udp.h>

#include <net/inet_sock.h>

static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
{
	return (struct ipv6hdr *)skb_network_header(skb);
}

static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
{
	return (struct ipv6hdr *)skb_transport_header(skb);
}

static inline __u8 ipv6_tclass(const struct ipv6hdr *iph)
{
	return (ntohl(*(__be32 *)iph) >> 20) & 0xff;
}

/* 
   This structure contains results of exthdrs parsing
   as offsets from skb->nh.
 */

struct inet6_skb_parm {
	int			iif;
	__u16			ra;
	__u16			hop;
	__u16			dst0;
	__u16			srcrt;
	__u16			dst1;
	__u16			lastopt;
	__u16			nhoff;
	__u16			flags;
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
	__u16			dsthao;
#endif

#define IP6SKB_XFRM_TRANSFORMED	1
#define IP6SKB_FORWARDED	2
#define IP6SKB_REROUTED		4
};

#define IP6CB(skb)	((struct inet6_skb_parm*)((skb)->cb))
#define IP6CBMTU(skb)	((struct ip6_mtuinfo *)((skb)->cb))

static inline int inet6_iif(const struct sk_buff *skb)
{
	return IP6CB(skb)->iif;
}

struct inet6_request_sock {
	struct in6_addr		loc_addr;
	struct in6_addr		rmt_addr;
	struct sk_buff		*pktopts;
	int			iif;
};

struct tcp6_request_sock {
	struct tcp_request_sock	  tcp6rsk_tcp;
	struct inet6_request_sock tcp6rsk_inet6;
};

struct ipv6_mc_socklist;
struct ipv6_ac_socklist;
struct ipv6_fl_socklist;

/**
 * struct ipv6_pinfo - ipv6 private area
 *
 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
 * this _must_ be the last member, so that inet6_sk_generic
 * is able to calculate its offset from the base struct sock
 * by using the struct proto->slab_obj_size member. -acme
 */
struct ipv6_pinfo {
	struct in6_addr 	saddr;
	struct in6_addr 	rcv_saddr;
	struct in6_addr		daddr;
	struct in6_pktinfo	sticky_pktinfo;
	const struct in6_addr		*daddr_cache;
#ifdef CONFIG_IPV6_SUBTREES
	const struct in6_addr		*saddr_cache;
#endif

	__be32			flow_label;
	__u32			frag_size;

	/*
	 * Packed in 16bits.
	 * Omit one shift by by putting the signed field at MSB.
	 */
#if defined(__BIG_ENDIAN_BITFIELD)
	__s16			hop_limit:9;
	__u16			__unused_1:7;
#else
	__u16			__unused_1:7;
	__s16			hop_limit:9;
#endif

#if defined(__BIG_ENDIAN_BITFIELD)
	/* Packed in 16bits. */
	__s16			mcast_hops:9;
	__u16			__unused_2:6,
				mc_loop:1;
#else
	__u16			mc_loop:1,
				__unused_2:6;
	__s16			mcast_hops:9;
#endif
	int			ucast_oif;
	int			mcast_oif;

	/* pktoption flags */
	union {
		struct {
			__u16	srcrt:1,
				osrcrt:1,
			        rxinfo:1,
			        rxoinfo:1,
				rxhlim:1,
				rxohlim:1,
				hopopts:1,
				ohopopts:1,
				dstopts:1,
				odstopts:1,
                                rxflow:1,
				rxtclass:1,
				rxpmtu:1,
				rxorigdstaddr:1;
				/* 2 bits hole */
		} bits;
		__u16		all;
	} rxopt;

	/* sockopt flags */
	__u16			recverr:1,
	                        sndflow:1,
				pmtudisc:2,
				ipv6only:1,
				srcprefs:3,	/* 001: prefer temporary address
						 * 010: prefer public address
						 * 100: prefer care-of address
						 */
				dontfrag:1;
	__u8			min_hopcount;
	__u8			tclass;
	__u8			rcv_tclass;

	__u32			dst_cookie;
	__u32			rx_dst_cookie;

	struct ipv6_mc_socklist	__rcu *ipv6_mc_list;
	struct ipv6_ac_socklist	*ipv6_ac_list;
	struct ipv6_fl_socklist *ipv6_fl_list;

	struct ipv6_txoptions	*opt;
	struct sk_buff		*pktoptions;
	struct sk_buff		*rxpmtu;
	struct {
		struct ipv6_txoptions *opt;
		u8 hop_limit;
		u8 tclass;
	} cork;
};

/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
struct raw6_sock {
	/* inet_sock has to be the first member of raw6_sock */
	struct inet_sock	inet;
	__u32			checksum;	/* perform checksum */
	__u32			offset;		/* checksum offset  */
	struct icmp6_filter	filter;
	__u32			ip6mr_table;
	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
	struct ipv6_pinfo	inet6;
};

struct udp6_sock {
	struct udp_sock	  udp;
	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
	struct ipv6_pinfo inet6;
};

struct tcp6_sock {
	struct tcp_sock	  tcp;
	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
	struct ipv6_pinfo inet6;
};

extern int inet6_sk_rebuild_header(struct sock *sk);

struct inet6_timewait_sock {
	struct in6_addr tw_v6_daddr;
	struct in6_addr	tw_v6_rcv_saddr;
};

struct tcp6_timewait_sock {
	struct tcp_timewait_sock   tcp6tw_tcp;
	struct inet6_timewait_sock tcp6tw_inet6;
};

static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
{
	return (struct inet6_timewait_sock *)(((u8 *)sk) +
					      inet_twsk(sk)->tw_ipv6_offset);
}

#if IS_ENABLED(CONFIG_IPV6)
static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
{
	return inet_sk(__sk)->pinet6;
}

static inline struct inet6_request_sock *
			inet6_rsk(const struct request_sock *rsk)
{
	return (struct inet6_request_sock *)(((u8 *)rsk) +
					     inet_rsk(rsk)->inet6_rsk_offset);
}

static inline u32 inet6_rsk_offset(struct request_sock *rsk)
{
	return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
}

static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
{
	struct request_sock *req = reqsk_alloc(ops);

	if (req != NULL) {
		inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
		inet6_rsk(req)->pktopts = NULL;
	}

	return req;
}

static inline struct raw6_sock *raw6_sk(const struct sock *sk)
{
	return (struct raw6_sock *)sk;
}

static inline void inet_sk_copy_descendant(struct sock *sk_to,
					   const struct sock *sk_from)
{
	int ancestor_size = sizeof(struct inet_sock);

	if (sk_from->sk_family == PF_INET6)
		ancestor_size += sizeof(struct ipv6_pinfo);

	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
}

#define __ipv6_only_sock(sk)	(inet6_sk(sk)->ipv6only)
#define ipv6_only_sock(sk)	((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))

static inline u16 inet6_tw_offset(const struct proto *prot)
{
	return prot->twsk_prot->twsk_obj_size -
			sizeof(struct inet6_timewait_sock);
}

static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
{
	return likely(sk->sk_state != TCP_TIME_WAIT) ?
		&inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
}

static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
{
	return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
}

static inline int inet_v6_ipv6only(const struct sock *sk)
{
	return likely(sk->sk_state != TCP_TIME_WAIT) ?
		ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
}
#else
#define __ipv6_only_sock(sk)	0
#define ipv6_only_sock(sk)	0

static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
{
	return NULL;
}

static inline struct inet6_request_sock *
			inet6_rsk(const struct request_sock *rsk)
{
	return NULL;
}

static inline struct raw6_sock *raw6_sk(const struct sock *sk)
{
	return NULL;
}

#define __inet6_rcv_saddr(__sk)	NULL
#define inet6_rcv_saddr(__sk)	NULL
#define tcp_twsk_ipv6only(__sk)		0
#define inet_v6_ipv6only(__sk)		0
#endif /* IS_ENABLED(CONFIG_IPV6) */

#define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net)	&& \
	 ((*((__portpair *)&(inet_sk(__sk)->inet_dport))) == (__ports)) && \
	 ((__sk)->sk_family		== AF_INET6)		&& \
	 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr))	&& \
	 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr))	&& \
	 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))

#define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net)	&& \
	 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports))	&& \
	 ((__sk)->sk_family	       == PF_INET6)			&& \
	 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)))	&& \
	 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
	 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))

#endif /* __KERNEL__ */

#endif /* _IPV6_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _IPV6_H
	2	#define _IPV6_H
	3
5c6aa2ba	4	#include <linux/types.h>
1da177e4 LT	5	#include <linux/in6.h>
	6	#include <asm/byteorder.h>
	7
	8	/* The latest drafts declared increase in minimal mtu up to 1280. */
	9
	10	#define IPV6_MIN_MTU 1280
	11
	12	/*
	13	* Advanced API
	14	* source interface/address selection, source routing, etc...
	15	* under construction
	16	*/
	17
	18
	19	struct in6_pktinfo {
	20	struct in6_addr ipi6_addr;
	21	int ipi6_ifindex;
	22	};
	23
793b1473 BH	24	struct ip6_mtuinfo {
	25	struct sockaddr_in6 ip6m_addr;
	26	__u32 ip6m_mtu;
	27	};
1da177e4 LT	28
	29	struct in6_ifreq {
	30	struct in6_addr ifr6_addr;
	31	__u32 ifr6_prefixlen;
	32	int ifr6_ifindex;
	33	};
	34
bb4dbf9e YH	35	#define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
bb4dbf9e YH	36	#define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
642ec62e	37	#define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
1da177e4 LT	38
	39	/*
	40	* routing header
	41	*/
	42	struct ipv6_rt_hdr {
	43	__u8 nexthdr;
	44	__u8 hdrlen;
	45	__u8 type;
	46	__u8 segments_left;
	47
	48	/*
	49	* type specific data
	50	* variable length field
	51	*/
	52	};
	53
	54
	55	struct ipv6_opt_hdr {
	56	__u8 nexthdr;
	57	__u8 hdrlen;
	58	/*
	59	* TLV encoded option data follows.
	60	*/
09cd2b99	61	} __attribute__((packed)); /* required for some archs */
1da177e4 LT	62
	63	#define ipv6_destopt_hdr ipv6_opt_hdr
	64	#define ipv6_hopopt_hdr ipv6_opt_hdr
	65
	66	#ifdef __KERNEL__
	67	#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
	68	#endif
	69
	70	/*
	71	* routing header type 0 (used in cmsghdr struct)
	72	*/
	73
	74	struct rt0_hdr {
	75	struct ipv6_rt_hdr rt_hdr;
e6df439b	76	__u32 reserved;
1da177e4 LT	77	struct in6_addr addr[0];
	78
	79	#define rt0_type rt_hdr.type
	80	};
	81
642ec62e NT	82	/*
	83	* routing header type 2
	84	*/
	85
	86	struct rt2_hdr {
	87	struct ipv6_rt_hdr rt_hdr;
	88	__u32 reserved;
	89	struct in6_addr addr;
	90
	91	#define rt2_type rt_hdr.type
	92	};
	93
842426e7 NT	94	/*
	95	* home address option in destination options header
	96	*/
	97
	98	struct ipv6_destopt_hao {
	99	__u8 type;
	100	__u8 length;
	101	struct in6_addr addr;
09cd2b99	102	} __attribute__((packed));
842426e7	103
1da177e4 LT	104	/*
	105	* IPv6 fixed header
	106	*
	107	* BEWARE, it is incorrect. The first 4 bits of flow_lbl
	108	* are glued to priority now, forming "class".
	109	*/
	110
	111	struct ipv6hdr {
	112	#if defined(__LITTLE_ENDIAN_BITFIELD)
	113	__u8 priority:4,
	114	version:4;
	115	#elif defined(__BIG_ENDIAN_BITFIELD)
	116	__u8 version:4,
	117	priority:4;
	118	#else
	119	#error "Please fix <asm/byteorder.h>"
	120	#endif
	121	__u8 flow_lbl[3];
	122
43505077	123	__be16 payload_len;
1da177e4 LT	124	__u8 nexthdr;
	125	__u8 hop_limit;
	126
	127	struct in6_addr saddr;
	128	struct in6_addr daddr;
	129	};
	130
ebb36a97	131	#ifdef __KERNEL__
1da177e4 LT	132	/*
	133	* This structure contains configuration options per IPv6 link.
	134	*/
	135	struct ipv6_devconf {
	136	__s32 forwarding;
	137	__s32 hop_limit;
	138	__s32 mtu6;
	139	__s32 accept_ra;
	140	__s32 accept_redirects;
	141	__s32 autoconf;
	142	__s32 dad_transmits;
	143	__s32 rtr_solicits;
	144	__s32 rtr_solicit_interval;
	145	__s32 rtr_solicit_delay;
	146	__s32 force_mld_version;
	147	#ifdef CONFIG_IPV6_PRIVACY
	148	__s32 use_tempaddr;
	149	__s32 temp_valid_lft;
	150	__s32 temp_prefered_lft;
	151	__s32 regen_max_retry;
	152	__s32 max_desync_factor;
	153	#endif
	154	__s32 max_addresses;
65f5c7c1	155	__s32 accept_ra_defrtr;
c4fd30eb	156	__s32 accept_ra_pinfo;
930d6ff2 YH	157	#ifdef CONFIG_IPV6_ROUTER_PREF
930d6ff2 YH	158	__s32 accept_ra_rtr_pref;
52e16356	159	__s32 rtr_probe_interval;
09c884d4 YH	160	#ifdef CONFIG_IPV6_ROUTE_INFO
	161	__s32 accept_ra_rt_info_max_plen;
	162	#endif
930d6ff2	163	#endif
fbea49e1	164	__s32 proxy_ndp;
0bcbc926	165	__s32 accept_source_route;
95c385b4 NH	166	#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
95c385b4 NH	167	__s32 optimistic_dad;
7bc570c8 YH	168	#endif
	169	#ifdef CONFIG_IPV6_MROUTE
	170	__s32 mc_forwarding;
95c385b4	171	#endif
778d80be	172	__s32 disable_ipv6;
1b34be74	173	__s32 accept_dad;
f7734fdf	174	__s32 force_tllao;
1da177e4 LT	175	void *sysctl;
1da177e4 LT	176	};
56d417b1 BH	177
	178	struct ipv6_params {
	179	__s32 disable_ipv6;
	180	__s32 autoconf;
	181	};
	182	extern struct ipv6_params ipv6_defaults;
ebb36a97	183	#endif
1da177e4 LT	184
	185	/* index values for the variables in ipv6_devconf */
	186	enum {
	187	DEVCONF_FORWARDING = 0,
	188	DEVCONF_HOPLIMIT,
	189	DEVCONF_MTU6,
	190	DEVCONF_ACCEPT_RA,
	191	DEVCONF_ACCEPT_REDIRECTS,
	192	DEVCONF_AUTOCONF,
	193	DEVCONF_DAD_TRANSMITS,
	194	DEVCONF_RTR_SOLICITS,
	195	DEVCONF_RTR_SOLICIT_INTERVAL,
	196	DEVCONF_RTR_SOLICIT_DELAY,
	197	DEVCONF_USE_TEMPADDR,
	198	DEVCONF_TEMP_VALID_LFT,
	199	DEVCONF_TEMP_PREFERED_LFT,
	200	DEVCONF_REGEN_MAX_RETRY,
	201	DEVCONF_MAX_DESYNC_FACTOR,
	202	DEVCONF_MAX_ADDRESSES,
	203	DEVCONF_FORCE_MLD_VERSION,
65f5c7c1	204	DEVCONF_ACCEPT_RA_DEFRTR,
c4fd30eb	205	DEVCONF_ACCEPT_RA_PINFO,
930d6ff2	206	DEVCONF_ACCEPT_RA_RTR_PREF,
52e16356	207	DEVCONF_RTR_PROBE_INTERVAL,
09c884d4	208	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
fbea49e1	209	DEVCONF_PROXY_NDP,
95c385b4	210	DEVCONF_OPTIMISTIC_DAD,
4540250b	211	DEVCONF_ACCEPT_SOURCE_ROUTE,
7bc570c8	212	DEVCONF_MC_FORWARDING,
778d80be	213	DEVCONF_DISABLE_IPV6,
1b34be74	214	DEVCONF_ACCEPT_DAD,
e0e6f55d	215	DEVCONF_FORCE_TLLAO,
1da177e4 LT	216	DEVCONF_MAX
	217	};
	218
	219	#ifdef __KERNEL__
1da177e4	220	#include <linux/icmpv6.h>
1da177e4 LT	221	#include <linux/tcp.h>
	222	#include <linux/udp.h>
	223
14c85021 ACM	224	#include <net/inet_sock.h>
14c85021 ACM	225
0660e03f ACM	226	static inline struct ipv6hdr ipv6_hdr(const struct sk_buff skb)
	227	{
	228	return (struct ipv6hdr *)skb_network_header(skb);
	229	}
	230
39b89160 ACM	231	static inline struct ipv6hdr ipipv6_hdr(const struct sk_buff skb)
39b89160 ACM	232	{
9c70220b	233	return (struct ipv6hdr *)skb_transport_header(skb);
39b89160 ACM	234	}
39b89160 ACM	235
7a3198a8 JB	236	static inline __u8 ipv6_tclass(const struct ipv6hdr *iph)
	237	{
	238	return (ntohl((__be32 )iph) >> 20) & 0xff;
	239	}
	240
1da177e4 LT	241	/*
	242	This structure contains results of exthdrs parsing
	243	as offsets from skb->nh.
	244	*/
	245
	246	struct inet6_skb_parm {
	247	int iif;
	248	__u16 ra;
	249	__u16 hop;
	250	__u16 dst0;
	251	__u16 srcrt;
	252	__u16 dst1;
333fad53	253	__u16 lastopt;
e7c38157	254	__u16 nhoff;
3e3850e9	255	__u16 flags;
59fbb3a6	256	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
8dd7368d DM	257	__u16 dsthao;
8dd7368d DM	258	#endif
3e3850e9 PM	259
3e3850e9 PM	260	#define IP6SKB_XFRM_TRANSFORMED 1
7bc570c8	261	#define IP6SKB_FORWARDED 2
9c6eb28a	262	#define IP6SKB_REROUTED 4
1da177e4 LT	263	};
	264
	265	#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
4b340ae2	266	#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
1da177e4	267
505cbfc5 ACM	268	static inline int inet6_iif(const struct sk_buff *skb)
	269	{
	270	return IP6CB(skb)->iif;
	271	}
	272
ca304b61	273	struct inet6_request_sock {
2e6599cb ACM	274	struct in6_addr loc_addr;
	275	struct in6_addr rmt_addr;
	276	struct sk_buff *pktopts;
	277	int iif;
	278	};
	279
ca304b61 ACM	280	struct tcp6_request_sock {
	281	struct tcp_request_sock tcp6rsk_tcp;
	282	struct inet6_request_sock tcp6rsk_inet6;
	283	};
2e6599cb	284
20283d84 HX	285	struct ipv6_mc_socklist;
	286	struct ipv6_ac_socklist;
	287	struct ipv6_fl_socklist;
	288
1da177e4 LT	289	/**
	290	* struct ipv6_pinfo - ipv6 private area
	291	*
	292	* In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
	293	* this _must_ be the last member, so that inet6_sk_generic
	294	* is able to calculate its offset from the base struct sock
	295	* by using the struct proto->slab_obj_size member. -acme
	296	*/
	297	struct ipv6_pinfo {
	298	struct in6_addr saddr;
	299	struct in6_addr rcv_saddr;
	300	struct in6_addr daddr;
b24a2516	301	struct in6_pktinfo sticky_pktinfo;
d3818c92	302	const struct in6_addr *daddr_cache;
8e1ef0a9	303	#ifdef CONFIG_IPV6_SUBTREES
d3818c92	304	const struct in6_addr *saddr_cache;
8e1ef0a9	305	#endif
1da177e4	306
90bcaf7b	307	__be32 flow_label;
1da177e4	308	__u32 frag_size;
1d5d236d YH	309
	310	/*
	311	* Packed in 16bits.
	312	* Omit one shift by by putting the signed field at MSB.
	313	*/
	314	#if defined(__BIG_ENDIAN_BITFIELD)
	315	__s16 hop_limit:9;
	316	__u16 __unused_1:7;
	317	#else
	318	__u16 __unused_1:7;
	319	__s16 hop_limit:9;
	320	#endif
	321
	322	#if defined(__BIG_ENDIAN_BITFIELD)
	323	/* Packed in 16bits. */
	324	__s16 mcast_hops:9;
	325	__u16 __unused_2:6,
	326	mc_loop:1;
	327	#else
	328	__u16 mc_loop:1,
	329	__unused_2:6;
	330	__s16 mcast_hops:9;
	331	#endif
c4062dfc	332	int ucast_oif;
1da177e4 LT	333	int mcast_oif;
	334
	335	/* pktoption flags */
	336	union {
	337	struct {
4c752098 YH	338	__u16 srcrt:1,
4c752098 YH	339	osrcrt:1,
1da177e4	340	rxinfo:1,
333fad53	341	rxoinfo:1,
1da177e4	342	rxhlim:1,
333fad53	343	rxohlim:1,
1da177e4	344	hopopts:1,
333fad53	345	ohopopts:1,
1da177e4	346	dstopts:1,
333fad53	347	odstopts:1,
41a1f8ea	348	rxflow:1,
793b1473	349	rxtclass:1,
6c468622 BS	350	rxpmtu:1,
	351	rxorigdstaddr:1;
	352	/* 2 bits hole */
1da177e4	353	} bits;
333fad53	354	__u16 all;
1da177e4 LT	355	} rxopt;
	356
	357	/* sockopt flags */
793b1473	358	__u16 recverr:1,
1da177e4 LT	359	sndflow:1,
1da177e4 LT	360	pmtudisc:2,
7cbca67c	361	ipv6only:1,
793b1473	362	srcprefs:3, /* 001: prefer temporary address
7cbca67c YH	363	* 010: prefer public address
	364	* 100: prefer care-of address
	365	*/
793b1473	366	dontfrag:1;
e802af9c	367	__u8 min_hopcount;
41a1f8ea	368	__u8 tclass;
4c507d28	369	__u8 rcv_tclass;
1da177e4 LT	370
1da177e4 LT	371	__u32 dst_cookie;
5d299f3d	372	__u32 rx_dst_cookie;
1da177e4	373
456b61bc	374	struct ipv6_mc_socklist __rcu *ipv6_mc_list;
1da177e4 LT	375	struct ipv6_ac_socklist *ipv6_ac_list;
	376	struct ipv6_fl_socklist *ipv6_fl_list;
	377
	378	struct ipv6_txoptions *opt;
	379	struct sk_buff *pktoptions;
4b340ae2	380	struct sk_buff *rxpmtu;
1da177e4 LT	381	struct {
1da177e4 LT	382	struct ipv6_txoptions *opt;
47254745 YH	383	u8 hop_limit;
47254745 YH	384	u8 tclass;
1da177e4 LT	385	} cork;
	386	};
	387
	388	/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
	389	struct raw6_sock {
	390	/* inet_sock has to be the first member of raw6_sock */
	391	struct inet_sock inet;
	392	__u32 checksum; /* perform checksum */
	393	__u32 offset; /* checksum offset */
	394	struct icmp6_filter filter;
d1db275d	395	__u32 ip6mr_table;
1da177e4 LT	396	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
	397	struct ipv6_pinfo inet6;
	398	};
	399
	400	struct udp6_sock {
	401	struct udp_sock udp;
	402	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
	403	struct ipv6_pinfo inet6;
	404	};
	405
	406	struct tcp6_sock {
	407	struct tcp_sock tcp;
	408	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
	409	struct ipv6_pinfo inet6;
	410	};
	411
b9750ce1 ACM	412	extern int inet6_sk_rebuild_header(struct sock *sk);
b9750ce1 ACM	413
48ee3569 DM	414	struct inet6_timewait_sock {
	415	struct in6_addr tw_v6_daddr;
	416	struct in6_addr tw_v6_rcv_saddr;
	417	};
	418
	419	struct tcp6_timewait_sock {
	420	struct tcp_timewait_sock tcp6tw_tcp;
	421	struct inet6_timewait_sock tcp6tw_inet6;
	422	};
	423
	424	static inline struct inet6_timewait_sock inet6_twsk(const struct sock sk)
	425	{
	426	return (struct inet6_timewait_sock )(((u8 )sk) +
	427	inet_twsk(sk)->tw_ipv6_offset);
	428	}
	429
dfd56b8b	430	#if IS_ENABLED(CONFIG_IPV6)
1da177e4 LT	431	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	432	{
	433	return inet_sk(__sk)->pinet6;
	434	}
	435
ca304b61 ACM	436	static inline struct inet6_request_sock *
	437	inet6_rsk(const struct request_sock *rsk)
	438	{
	439	return (struct inet6_request_sock )(((u8 )rsk) +
	440	inet_rsk(rsk)->inet6_rsk_offset);
	441	}
	442
	443	static inline u32 inet6_rsk_offset(struct request_sock *rsk)
	444	{
	445	return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
	446	}
	447
	448	static inline struct request_sock inet6_reqsk_alloc(struct request_sock_ops ops)
	449	{
	450	struct request_sock *req = reqsk_alloc(ops);
	451
ce4a7d0d	452	if (req != NULL) {
ca304b61	453	inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
ce4a7d0d ACM	454	inet6_rsk(req)->pktopts = NULL;
ce4a7d0d ACM	455	}
ca304b61 ACM	456
	457	return req;
	458	}
	459
1da177e4 LT	460	static inline struct raw6_sock raw6_sk(const struct sock sk)
	461	{
	462	return (struct raw6_sock *)sk;
	463	}
	464
	465	static inline void inet_sk_copy_descendant(struct sock *sk_to,
	466	const struct sock *sk_from)
	467	{
	468	int ancestor_size = sizeof(struct inet_sock);
	469
	470	if (sk_from->sk_family == PF_INET6)
	471	ancestor_size += sizeof(struct ipv6_pinfo);
	472
	473	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
	474	}
	475
	476	#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
	477	#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
8feaf0c0	478
0fa1a53e ACM	479	static inline u16 inet6_tw_offset(const struct proto *prot)
0fa1a53e ACM	480	{
6d6ee43e ACM	481	return prot->twsk_prot->twsk_obj_size -
6d6ee43e ACM	482	sizeof(struct inet6_timewait_sock);
0fa1a53e ACM	483	}
0fa1a53e ACM	484
0fa1a53e	485	static inline struct in6_addr __inet6_rcv_saddr(const struct sock sk)
8feaf0c0 ACM	486	{
8feaf0c0 ACM	487	return likely(sk->sk_state != TCP_TIME_WAIT) ?
0fa1a53e	488	&inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
8feaf0c0 ACM	489	}
8feaf0c0 ACM	490
0fa1a53e	491	static inline struct in6_addr inet6_rcv_saddr(const struct sock sk)
8feaf0c0	492	{
0fa1a53e	493	return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
8feaf0c0 ACM	494	}
8feaf0c0 ACM	495
463c84b9	496	static inline int inet_v6_ipv6only(const struct sock *sk)
8feaf0c0 ACM	497	{
8feaf0c0 ACM	498	return likely(sk->sk_state != TCP_TIME_WAIT) ?
3f421baa	499	ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
8feaf0c0	500	}
1da177e4 LT	501	#else
	502	#define __ipv6_only_sock(sk) 0
	503	#define ipv6_only_sock(sk) 0
	504
	505	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	506	{
	507	return NULL;
	508	}
	509
ca304b61 ACM	510	static inline struct inet6_request_sock *
	511	inet6_rsk(const struct request_sock *rsk)
	512	{
	513	return NULL;
	514	}
	515
1da177e4 LT	516	static inline struct raw6_sock raw6_sk(const struct sock sk)
	517	{
	518	return NULL;
	519	}
	520
0fa1a53e ACM	521	#define __inet6_rcv_saddr(__sk) NULL
0fa1a53e ACM	522	#define inet6_rcv_saddr(__sk) NULL
8feaf0c0	523	#define tcp_twsk_ipv6only(__sk) 0
463c84b9	524	#define inet_v6_ipv6only(__sk) 0
dfd56b8b	525	#endif /* IS_ENABLED(CONFIG_IPV6) */
1da177e4	526
d86e0dac	527	#define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
3b1e0a65	528	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
c720c7e8	529	((((__portpair )&(inet_sk(__sk)->inet_dport))) == (__ports)) && \
8feaf0c0 ACM	530	((__sk)->sk_family == AF_INET6) && \
	531	ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
	532	ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
	533	(!((__sk)->sk_bound_dev_if) \|\| ((__sk)->sk_bound_dev_if == (__dif))))
1da177e4	534
d86e0dac	535	#define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
3b1e0a65	536	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
535174ef PE	537	(((__portpair )&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \
	538	((__sk)->sk_family == PF_INET6) && \
	539	(ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \
	540	(ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
	541	(!((__sk)->sk_bound_dev_if) \|\| ((__sk)->sk_bound_dev_if == (__dif))))
	542
8feaf0c0 ACM	543	#endif /* __KERNEL__ */
	544
	545	#endif /* _IPV6_H */