[deliverable/linux.git] / include / linux / ipv6.h

#ifndef _IPV6_H
#define _IPV6_H

#include <linux/config.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 in6_ifreq {
	struct in6_addr	ifr6_addr;
	__u32		ifr6_prefixlen;
	int		ifr6_ifindex; 
};

#define IPV6_SRCRT_STRICT	0x01	/* this hop must be a neighbor	*/
#define IPV6_SRCRT_TYPE_0	0	/* IPv6 type 0 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.
	 */
};

#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
};

struct ipv6_auth_hdr {
	__u8  nexthdr;
	__u8  hdrlen;           /* This one is measured in 32 bit units! */
	__u16 reserved;
	__u32 spi;
	__u32 seq_no;           /* Sequence number */
	__u8  auth_data[0];     /* Length variable but >=4. Mind the 64 bit alignment! */
};

struct ipv6_esp_hdr {
	__u32 spi;
	__u32 seq_no;           /* Sequence number */
	__u8  enc_data[0];      /* Length variable but >=8. Mind the 64 bit alignment! */
};

struct ipv6_comp_hdr {
	__u8 nexthdr;
	__u8 flags;
	__u16 cpi;
};

/*
 *	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];

	__u16			payload_len;
	__u8			nexthdr;
	__u8			hop_limit;

	struct	in6_addr	saddr;
	struct	in6_addr	daddr;
};

/*
 * 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;
	void		*sysctl;
};

/* 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_MAX
};

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

#include <net/if_inet6.h>       /* struct ipv6_mc_socklist */
#include <net/inet_sock.h>

/* 
   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;
};

#define IP6CB(skb)	((struct inet6_skb_parm*)((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_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_addr		*daddr_cache;

	__u32			flow_label;
	__u32			frag_size;
	__s16			hop_limit;
	__s16			mcast_hops;
	int			mcast_oif;

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

	/* sockopt flags */
	__u8			mc_loop:1,
	                        recverr:1,
	                        sndflow:1,
				pmtudisc:2,
				ipv6only:1;
	__u8			tclass;

	__u32			dst_cookie;

	struct ipv6_mc_socklist	*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 {
		struct ipv6_txoptions *opt;
		struct rt6_info	*rt;
		int hop_limit;
		int 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;
	/* 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);

#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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);

	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))

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

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);
}

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 /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */

#define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
	(((__sk)->sk_hash == (__hash))				&& \
	 ((*((__u32 *)&(inet_sk(__sk)->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))))

#endif /* __KERNEL__ */

#endif /* _IPV6_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _IPV6_H
	2	#define _IPV6_H
	3
	4	#include <linux/config.h>
	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
	24
	25	struct in6_ifreq {
	26	struct in6_addr ifr6_addr;
	27	__u32 ifr6_prefixlen;
	28	int ifr6_ifindex;
	29	};
	30
	31	#define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */
	32	#define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 Routing Header */
	33
	34	/*
	35	* routing header
	36	*/
	37	struct ipv6_rt_hdr {
	38	__u8 nexthdr;
	39	__u8 hdrlen;
	40	__u8 type;
	41	__u8 segments_left;
	42
	43	/*
	44	* type specific data
	45	* variable length field
	46	*/
	47	};
	48
	49
	50	struct ipv6_opt_hdr {
	51	__u8 nexthdr;
	52	__u8 hdrlen;
	53	/*
	54	* TLV encoded option data follows.
	55	*/
	56	};
	57
	58	#define ipv6_destopt_hdr ipv6_opt_hdr
	59	#define ipv6_hopopt_hdr ipv6_opt_hdr
	60
	61	#ifdef __KERNEL__
	62	#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
	63	#endif
	64
65	/*
66	* routing header type 0 (used in cmsghdr struct)
67	*/
68
69	struct rt0_hdr {
70	struct ipv6_rt_hdr rt_hdr;
e6df439b	71	__u32 reserved;
1da177e4 LT	72	struct in6_addr addr[0];
	73
	74	#define rt0_type rt_hdr.type
	75	};
	76
	77	struct ipv6_auth_hdr {
	78	__u8 nexthdr;
	79	__u8 hdrlen; /* This one is measured in 32 bit units! */
	80	__u16 reserved;
	81	__u32 spi;
	82	__u32 seq_no; /* Sequence number */
	83	__u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
	84	};
	85
	86	struct ipv6_esp_hdr {
	87	__u32 spi;
	88	__u32 seq_no; /* Sequence number */
	89	__u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
	90	};
	91
	92	struct ipv6_comp_hdr {
	93	__u8 nexthdr;
	94	__u8 flags;
	95	__u16 cpi;
	96	};
	97
	98	/*
	99	* IPv6 fixed header
	100	*
	101	* BEWARE, it is incorrect. The first 4 bits of flow_lbl
	102	* are glued to priority now, forming "class".
	103	*/
	104
	105	struct ipv6hdr {
	106	#if defined(__LITTLE_ENDIAN_BITFIELD)
	107	__u8 priority:4,
	108	version:4;
	109	#elif defined(__BIG_ENDIAN_BITFIELD)
	110	__u8 version:4,
	111	priority:4;
	112	#else
	113	#error "Please fix <asm/byteorder.h>"
	114	#endif
	115	__u8 flow_lbl[3];
	116
	117	__u16 payload_len;
	118	__u8 nexthdr;
	119	__u8 hop_limit;
	120
	121	struct in6_addr saddr;
	122	struct in6_addr daddr;
	123	};
	124
	125	/*
	126	* This structure contains configuration options per IPv6 link.
	127	*/
	128	struct ipv6_devconf {
	129	__s32 forwarding;
	130	__s32 hop_limit;
	131	__s32 mtu6;
	132	__s32 accept_ra;
	133	__s32 accept_redirects;
	134	__s32 autoconf;
	135	__s32 dad_transmits;
136	__s32 rtr_solicits;
137	__s32 rtr_solicit_interval;
138	__s32 rtr_solicit_delay;
139	__s32 force_mld_version;
140	#ifdef CONFIG_IPV6_PRIVACY
141	__s32 use_tempaddr;
142	__s32 temp_valid_lft;
143	__s32 temp_prefered_lft;
144	__s32 regen_max_retry;
145	__s32 max_desync_factor;
146	#endif
147	__s32 max_addresses;
148	void *sysctl;
149	};
150
151	/* index values for the variables in ipv6_devconf */
152	enum {
153	DEVCONF_FORWARDING = 0,
154	DEVCONF_HOPLIMIT,
155	DEVCONF_MTU6,
156	DEVCONF_ACCEPT_RA,
157	DEVCONF_ACCEPT_REDIRECTS,
158	DEVCONF_AUTOCONF,
159	DEVCONF_DAD_TRANSMITS,
160	DEVCONF_RTR_SOLICITS,
161	DEVCONF_RTR_SOLICIT_INTERVAL,
162	DEVCONF_RTR_SOLICIT_DELAY,
163	DEVCONF_USE_TEMPADDR,
164	DEVCONF_TEMP_VALID_LFT,
165	DEVCONF_TEMP_PREFERED_LFT,
166	DEVCONF_REGEN_MAX_RETRY,
167	DEVCONF_MAX_DESYNC_FACTOR,
168	DEVCONF_MAX_ADDRESSES,
169	DEVCONF_FORCE_MLD_VERSION,
170	DEVCONF_MAX
171	};
172
173	#ifdef __KERNEL__
1da177e4	174	#include <linux/icmpv6.h>
1da177e4 LT	175	#include <linux/tcp.h>
	176	#include <linux/udp.h>
	177
14c85021 ACM	178	#include <net/if_inet6.h> /* struct ipv6_mc_socklist */
	179	#include <net/inet_sock.h>
	180
1da177e4 LT	181	/*
	182	This structure contains results of exthdrs parsing
	183	as offsets from skb->nh.
	184	*/
	185
	186	struct inet6_skb_parm {
	187	int iif;
	188	__u16 ra;
	189	__u16 hop;
	190	__u16 dst0;
	191	__u16 srcrt;
	192	__u16 dst1;
333fad53	193	__u16 lastopt;
1da177e4 LT	194	};
	195
	196	#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
	197
505cbfc5 ACM	198	static inline int inet6_iif(const struct sk_buff *skb)
	199	{
	200	return IP6CB(skb)->iif;
	201	}
	202
ca304b61	203	struct inet6_request_sock {
2e6599cb ACM	204	struct in6_addr loc_addr;
	205	struct in6_addr rmt_addr;
	206	struct sk_buff *pktopts;
	207	int iif;
	208	};
	209
ca304b61 ACM	210	struct tcp6_request_sock {
	211	struct tcp_request_sock tcp6rsk_tcp;
	212	struct inet6_request_sock tcp6rsk_inet6;
	213	};
2e6599cb	214
1da177e4 LT	215	/**
	216	* struct ipv6_pinfo - ipv6 private area
	217	*
	218	* In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
	219	* this _must_ be the last member, so that inet6_sk_generic
	220	* is able to calculate its offset from the base struct sock
	221	* by using the struct proto->slab_obj_size member. -acme
	222	*/
	223	struct ipv6_pinfo {
	224	struct in6_addr saddr;
	225	struct in6_addr rcv_saddr;
	226	struct in6_addr daddr;
	227	struct in6_addr *daddr_cache;
	228
	229	__u32 flow_label;
	230	__u32 frag_size;
	231	__s16 hop_limit;
	232	__s16 mcast_hops;
	233	int mcast_oif;
	234
	235	/* pktoption flags */
	236	union {
	237	struct {
333fad53 YH	238	__u16 srcrt:2,
333fad53 YH	239	osrcrt:2,
1da177e4	240	rxinfo:1,
333fad53	241	rxoinfo:1,
1da177e4	242	rxhlim:1,
333fad53	243	rxohlim:1,
1da177e4	244	hopopts:1,
333fad53	245	ohopopts:1,
1da177e4	246	dstopts:1,
333fad53	247	odstopts:1,
41a1f8ea YH	248	rxflow:1,
41a1f8ea YH	249	rxtclass:1;
1da177e4	250	} bits;
333fad53	251	__u16 all;
1da177e4 LT	252	} rxopt;
	253
	254	/* sockopt flags */
	255	__u8 mc_loop:1,
	256	recverr:1,
	257	sndflow:1,
	258	pmtudisc:2,
	259	ipv6only:1;
41a1f8ea	260	__u8 tclass;
1da177e4 LT	261
	262	__u32 dst_cookie;
	263
	264	struct ipv6_mc_socklist *ipv6_mc_list;
	265	struct ipv6_ac_socklist *ipv6_ac_list;
	266	struct ipv6_fl_socklist *ipv6_fl_list;
	267
	268	struct ipv6_txoptions *opt;
	269	struct sk_buff *pktoptions;
	270	struct {
	271	struct ipv6_txoptions *opt;
	272	struct rt6_info *rt;
	273	int hop_limit;
41a1f8ea	274	int tclass;
1da177e4 LT	275	} cork;
	276	};
	277
	278	/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
	279	struct raw6_sock {
	280	/* inet_sock has to be the first member of raw6_sock */
	281	struct inet_sock inet;
	282	__u32 checksum; /* perform checksum */
	283	__u32 offset; /* checksum offset */
	284	struct icmp6_filter filter;
	285	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
	286	struct ipv6_pinfo inet6;
	287	};
	288
	289	struct udp6_sock {
	290	struct udp_sock udp;
	291	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
	292	struct ipv6_pinfo inet6;
	293	};
	294
	295	struct tcp6_sock {
	296	struct tcp_sock tcp;
	297	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
	298	struct ipv6_pinfo inet6;
	299	};
	300
b9750ce1 ACM	301	extern int inet6_sk_rebuild_header(struct sock *sk);
b9750ce1 ACM	302
1da177e4 LT	303	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	304	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	305	{
	306	return inet_sk(__sk)->pinet6;
	307	}
	308
ca304b61 ACM	309	static inline struct inet6_request_sock *
	310	inet6_rsk(const struct request_sock *rsk)
	311	{
	312	return (struct inet6_request_sock )(((u8 )rsk) +
	313	inet_rsk(rsk)->inet6_rsk_offset);
	314	}
	315
	316	static inline u32 inet6_rsk_offset(struct request_sock *rsk)
	317	{
	318	return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
	319	}
	320
	321	static inline struct request_sock inet6_reqsk_alloc(struct request_sock_ops ops)
	322	{
	323	struct request_sock *req = reqsk_alloc(ops);
	324
	325	if (req != NULL)
	326	inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
	327
	328	return req;
	329	}
	330
1da177e4 LT	331	static inline struct raw6_sock raw6_sk(const struct sock sk)
	332	{
	333	return (struct raw6_sock *)sk;
	334	}
	335
	336	static inline void inet_sk_copy_descendant(struct sock *sk_to,
	337	const struct sock *sk_from)
	338	{
	339	int ancestor_size = sizeof(struct inet_sock);
	340
	341	if (sk_from->sk_family == PF_INET6)
	342	ancestor_size += sizeof(struct ipv6_pinfo);
	343
	344	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
	345	}
	346
	347	#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
	348	#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
8feaf0c0	349
0fa1a53e ACM	350	struct inet6_timewait_sock {
	351	struct in6_addr tw_v6_daddr;
	352	struct in6_addr tw_v6_rcv_saddr;
	353	};
	354
8feaf0c0	355	struct tcp6_timewait_sock {
0fa1a53e ACM	356	struct tcp_timewait_sock tcp6tw_tcp;
0fa1a53e ACM	357	struct inet6_timewait_sock tcp6tw_inet6;
8feaf0c0 ACM	358	};
8feaf0c0 ACM	359
0fa1a53e ACM	360	static inline u16 inet6_tw_offset(const struct proto *prot)
0fa1a53e ACM	361	{
6d6ee43e ACM	362	return prot->twsk_prot->twsk_obj_size -
6d6ee43e ACM	363	sizeof(struct inet6_timewait_sock);
0fa1a53e ACM	364	}
	365
	366	static inline struct inet6_timewait_sock inet6_twsk(const struct sock sk)
8feaf0c0	367	{
0fa1a53e ACM	368	return (struct inet6_timewait_sock )(((u8 )sk) +
0fa1a53e ACM	369	inet_twsk(sk)->tw_ipv6_offset);
8feaf0c0 ACM	370	}
8feaf0c0 ACM	371
0fa1a53e	372	static inline struct in6_addr __inet6_rcv_saddr(const struct sock sk)
8feaf0c0 ACM	373	{
8feaf0c0 ACM	374	return likely(sk->sk_state != TCP_TIME_WAIT) ?
0fa1a53e	375	&inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
8feaf0c0 ACM	376	}
8feaf0c0 ACM	377
0fa1a53e	378	static inline struct in6_addr inet6_rcv_saddr(const struct sock sk)
8feaf0c0	379	{
0fa1a53e	380	return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
8feaf0c0 ACM	381	}
8feaf0c0 ACM	382
463c84b9	383	static inline int inet_v6_ipv6only(const struct sock *sk)
8feaf0c0 ACM	384	{
8feaf0c0 ACM	385	return likely(sk->sk_state != TCP_TIME_WAIT) ?
3f421baa	386	ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
8feaf0c0	387	}
1da177e4 LT	388	#else
	389	#define __ipv6_only_sock(sk) 0
	390	#define ipv6_only_sock(sk) 0
	391
	392	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	393	{
	394	return NULL;
	395	}
	396
ca304b61 ACM	397	static inline struct inet6_request_sock *
	398	inet6_rsk(const struct request_sock *rsk)
	399	{
	400	return NULL;
	401	}
	402
1da177e4 LT	403	static inline struct raw6_sock raw6_sk(const struct sock sk)
	404	{
	405	return NULL;
	406	}
	407
0fa1a53e ACM	408	#define __inet6_rcv_saddr(__sk) NULL
0fa1a53e ACM	409	#define inet6_rcv_saddr(__sk) NULL
8feaf0c0	410	#define tcp_twsk_ipv6only(__sk) 0
463c84b9	411	#define inet_v6_ipv6only(__sk) 0
8feaf0c0	412	#endif /* defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE) */
1da177e4	413
81c3d547 ED	414	#define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
	415	(((__sk)->sk_hash == (__hash)) && \
	416	((((__u32 )&(inet_sk(__sk)->dport))) == (__ports)) && \
8feaf0c0 ACM	417	((__sk)->sk_family == AF_INET6) && \
	418	ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
	419	ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
	420	(!((__sk)->sk_bound_dev_if) \|\| ((__sk)->sk_bound_dev_if == (__dif))))
1da177e4	421
8feaf0c0 ACM	422	#endif /* __KERNEL__ */
	423
	424	#endif /* _IPV6_H */