[net-next-2.6.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;
	__s32		accept_ra_defrtr;
	__s32		accept_ra_pinfo;
	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_ACCEPT_RA_DEFRTR,
	DEVCONF_ACCEPT_RA_PINFO,
	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;
	__u32			nhoff;
	__u16			flags;

#define IP6SKB_XFRM_TRANSFORMED	1
};

#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;
65f5c7c1	148	__s32 accept_ra_defrtr;
c4fd30eb	149	__s32 accept_ra_pinfo;
1da177e4 LT	150	void *sysctl;
	151	};
	152
	153	/* index values for the variables in ipv6_devconf */
	154	enum {
	155	DEVCONF_FORWARDING = 0,
	156	DEVCONF_HOPLIMIT,
	157	DEVCONF_MTU6,
	158	DEVCONF_ACCEPT_RA,
	159	DEVCONF_ACCEPT_REDIRECTS,
	160	DEVCONF_AUTOCONF,
	161	DEVCONF_DAD_TRANSMITS,
	162	DEVCONF_RTR_SOLICITS,
	163	DEVCONF_RTR_SOLICIT_INTERVAL,
	164	DEVCONF_RTR_SOLICIT_DELAY,
	165	DEVCONF_USE_TEMPADDR,
	166	DEVCONF_TEMP_VALID_LFT,
	167	DEVCONF_TEMP_PREFERED_LFT,
	168	DEVCONF_REGEN_MAX_RETRY,
	169	DEVCONF_MAX_DESYNC_FACTOR,
	170	DEVCONF_MAX_ADDRESSES,
	171	DEVCONF_FORCE_MLD_VERSION,
65f5c7c1	172	DEVCONF_ACCEPT_RA_DEFRTR,
c4fd30eb	173	DEVCONF_ACCEPT_RA_PINFO,
1da177e4 LT	174	DEVCONF_MAX
	175	};
	176
	177	#ifdef __KERNEL__
1da177e4	178	#include <linux/icmpv6.h>
1da177e4 LT	179	#include <linux/tcp.h>
	180	#include <linux/udp.h>
	181
14c85021 ACM	182	#include <net/if_inet6.h> /* struct ipv6_mc_socklist */
	183	#include <net/inet_sock.h>
	184
1da177e4 LT	185	/*
	186	This structure contains results of exthdrs parsing
	187	as offsets from skb->nh.
	188	*/
	189
	190	struct inet6_skb_parm {
	191	int iif;
	192	__u16 ra;
	193	__u16 hop;
	194	__u16 dst0;
	195	__u16 srcrt;
	196	__u16 dst1;
333fad53	197	__u16 lastopt;
951dbc8a	198	__u32 nhoff;
3e3850e9 PM	199	__u16 flags;
	200
	201	#define IP6SKB_XFRM_TRANSFORMED 1
1da177e4 LT	202	};
	203
	204	#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
	205
505cbfc5 ACM	206	static inline int inet6_iif(const struct sk_buff *skb)
	207	{
	208	return IP6CB(skb)->iif;
	209	}
	210
ca304b61	211	struct inet6_request_sock {
2e6599cb ACM	212	struct in6_addr loc_addr;
	213	struct in6_addr rmt_addr;
	214	struct sk_buff *pktopts;
	215	int iif;
	216	};
	217
ca304b61 ACM	218	struct tcp6_request_sock {
	219	struct tcp_request_sock tcp6rsk_tcp;
	220	struct inet6_request_sock tcp6rsk_inet6;
	221	};
2e6599cb	222
1da177e4 LT	223	/**
	224	* struct ipv6_pinfo - ipv6 private area
	225	*
	226	* In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
	227	* this _must_ be the last member, so that inet6_sk_generic
	228	* is able to calculate its offset from the base struct sock
	229	* by using the struct proto->slab_obj_size member. -acme
	230	*/
	231	struct ipv6_pinfo {
	232	struct in6_addr saddr;
	233	struct in6_addr rcv_saddr;
	234	struct in6_addr daddr;
	235	struct in6_addr *daddr_cache;
	236
	237	__u32 flow_label;
	238	__u32 frag_size;
	239	__s16 hop_limit;
	240	__s16 mcast_hops;
	241	int mcast_oif;
	242
	243	/* pktoption flags */
	244	union {
	245	struct {
333fad53 YH	246	__u16 srcrt:2,
333fad53 YH	247	osrcrt:2,
1da177e4	248	rxinfo:1,
333fad53	249	rxoinfo:1,
1da177e4	250	rxhlim:1,
333fad53	251	rxohlim:1,
1da177e4	252	hopopts:1,
333fad53	253	ohopopts:1,
1da177e4	254	dstopts:1,
333fad53	255	odstopts:1,
41a1f8ea YH	256	rxflow:1,
41a1f8ea YH	257	rxtclass:1;
1da177e4	258	} bits;
333fad53	259	__u16 all;
1da177e4 LT	260	} rxopt;
	261
	262	/* sockopt flags */
	263	__u8 mc_loop:1,
	264	recverr:1,
	265	sndflow:1,
	266	pmtudisc:2,
	267	ipv6only:1;
41a1f8ea	268	__u8 tclass;
1da177e4 LT	269
	270	__u32 dst_cookie;
	271
	272	struct ipv6_mc_socklist *ipv6_mc_list;
	273	struct ipv6_ac_socklist *ipv6_ac_list;
	274	struct ipv6_fl_socklist *ipv6_fl_list;
	275
	276	struct ipv6_txoptions *opt;
	277	struct sk_buff *pktoptions;
	278	struct {
	279	struct ipv6_txoptions *opt;
	280	struct rt6_info *rt;
	281	int hop_limit;
41a1f8ea	282	int tclass;
1da177e4 LT	283	} cork;
	284	};
	285
	286	/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
	287	struct raw6_sock {
	288	/* inet_sock has to be the first member of raw6_sock */
	289	struct inet_sock inet;
	290	__u32 checksum; /* perform checksum */
	291	__u32 offset; /* checksum offset */
	292	struct icmp6_filter filter;
	293	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
	294	struct ipv6_pinfo inet6;
	295	};
	296
	297	struct udp6_sock {
	298	struct udp_sock udp;
	299	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
	300	struct ipv6_pinfo inet6;
	301	};
	302
	303	struct tcp6_sock {
	304	struct tcp_sock tcp;
	305	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
	306	struct ipv6_pinfo inet6;
	307	};
	308
b9750ce1 ACM	309	extern int inet6_sk_rebuild_header(struct sock *sk);
b9750ce1 ACM	310
1da177e4 LT	311	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	312	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	313	{
	314	return inet_sk(__sk)->pinet6;
	315	}
	316
ca304b61 ACM	317	static inline struct inet6_request_sock *
	318	inet6_rsk(const struct request_sock *rsk)
	319	{
	320	return (struct inet6_request_sock )(((u8 )rsk) +
	321	inet_rsk(rsk)->inet6_rsk_offset);
	322	}
	323
	324	static inline u32 inet6_rsk_offset(struct request_sock *rsk)
	325	{
	326	return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
	327	}
	328
	329	static inline struct request_sock inet6_reqsk_alloc(struct request_sock_ops ops)
	330	{
	331	struct request_sock *req = reqsk_alloc(ops);
	332
	333	if (req != NULL)
	334	inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
	335
	336	return req;
	337	}
	338
1da177e4 LT	339	static inline struct raw6_sock raw6_sk(const struct sock sk)
	340	{
	341	return (struct raw6_sock *)sk;
	342	}
	343
	344	static inline void inet_sk_copy_descendant(struct sock *sk_to,
	345	const struct sock *sk_from)
	346	{
	347	int ancestor_size = sizeof(struct inet_sock);
	348
	349	if (sk_from->sk_family == PF_INET6)
	350	ancestor_size += sizeof(struct ipv6_pinfo);
	351
	352	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
	353	}
	354
	355	#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
	356	#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
8feaf0c0	357
0fa1a53e ACM	358	struct inet6_timewait_sock {
	359	struct in6_addr tw_v6_daddr;
	360	struct in6_addr tw_v6_rcv_saddr;
	361	};
	362
8feaf0c0	363	struct tcp6_timewait_sock {
0fa1a53e ACM	364	struct tcp_timewait_sock tcp6tw_tcp;
0fa1a53e ACM	365	struct inet6_timewait_sock tcp6tw_inet6;
8feaf0c0 ACM	366	};
8feaf0c0 ACM	367
0fa1a53e ACM	368	static inline u16 inet6_tw_offset(const struct proto *prot)
0fa1a53e ACM	369	{
6d6ee43e ACM	370	return prot->twsk_prot->twsk_obj_size -
6d6ee43e ACM	371	sizeof(struct inet6_timewait_sock);
0fa1a53e ACM	372	}
	373
	374	static inline struct inet6_timewait_sock inet6_twsk(const struct sock sk)
8feaf0c0	375	{
0fa1a53e ACM	376	return (struct inet6_timewait_sock )(((u8 )sk) +
0fa1a53e ACM	377	inet_twsk(sk)->tw_ipv6_offset);
8feaf0c0 ACM	378	}
8feaf0c0 ACM	379
0fa1a53e	380	static inline struct in6_addr __inet6_rcv_saddr(const struct sock sk)
8feaf0c0 ACM	381	{
8feaf0c0 ACM	382	return likely(sk->sk_state != TCP_TIME_WAIT) ?
0fa1a53e	383	&inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
8feaf0c0 ACM	384	}
8feaf0c0 ACM	385
0fa1a53e	386	static inline struct in6_addr inet6_rcv_saddr(const struct sock sk)
8feaf0c0	387	{
0fa1a53e	388	return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
8feaf0c0 ACM	389	}
8feaf0c0 ACM	390
463c84b9	391	static inline int inet_v6_ipv6only(const struct sock *sk)
8feaf0c0 ACM	392	{
8feaf0c0 ACM	393	return likely(sk->sk_state != TCP_TIME_WAIT) ?
3f421baa	394	ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
8feaf0c0	395	}
1da177e4 LT	396	#else
	397	#define __ipv6_only_sock(sk) 0
	398	#define ipv6_only_sock(sk) 0
	399
	400	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	401	{
	402	return NULL;
	403	}
	404
ca304b61 ACM	405	static inline struct inet6_request_sock *
	406	inet6_rsk(const struct request_sock *rsk)
	407	{
	408	return NULL;
	409	}
	410
1da177e4 LT	411	static inline struct raw6_sock raw6_sk(const struct sock sk)
	412	{
	413	return NULL;
	414	}
	415
0fa1a53e ACM	416	#define __inet6_rcv_saddr(__sk) NULL
0fa1a53e ACM	417	#define inet6_rcv_saddr(__sk) NULL
8feaf0c0	418	#define tcp_twsk_ipv6only(__sk) 0
463c84b9	419	#define inet_v6_ipv6only(__sk) 0
8feaf0c0	420	#endif /* defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE) */
1da177e4	421
81c3d547 ED	422	#define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
	423	(((__sk)->sk_hash == (__hash)) && \
	424	((((__u32 )&(inet_sk(__sk)->dport))) == (__ports)) && \
8feaf0c0 ACM	425	((__sk)->sk_family == AF_INET6) && \
	426	ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
	427	ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
	428	(!((__sk)->sk_bound_dev_if) \|\| ((__sk)->sk_bound_dev_if == (__dif))))
1da177e4	429
8feaf0c0 ACM	430	#endif /* __KERNEL__ */
	431
	432	#endif /* _IPV6_H */