[net-next-2.6.git] / include / linux / ipv6.h

#ifndef _IPV6_H
#define _IPV6_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;
#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
	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_ACCEPT_RA_RTR_PREF,
	DEVCONF_RTR_PROBE_INTERVAL,
	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
	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;
#ifdef CONFIG_IPV6_SUBTREES
	struct in6_addr		*saddr_cache;
#endif

	__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
1da177e4 LT	4	#include <linux/in6.h>
	5	#include <asm/byteorder.h>
	6
	7	/* The latest drafts declared increase in minimal mtu up to 1280. */
	8
	9	#define IPV6_MIN_MTU 1280
	10
	11	/*
	12	* Advanced API
	13	* source interface/address selection, source routing, etc...
	14	* under construction
	15	*/
	16
	17
	18	struct in6_pktinfo {
	19	struct in6_addr ipi6_addr;
	20	int ipi6_ifindex;
	21	};
	22
	23
	24	struct in6_ifreq {
	25	struct in6_addr ifr6_addr;
	26	__u32 ifr6_prefixlen;
	27	int ifr6_ifindex;
	28	};
	29
	30	#define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */
	31	#define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 Routing Header */
	32
	33	/*
	34	* routing header
	35	*/
	36	struct ipv6_rt_hdr {
	37	__u8 nexthdr;
	38	__u8 hdrlen;
	39	__u8 type;
	40	__u8 segments_left;
	41
	42	/*
	43	* type specific data
	44	* variable length field
	45	*/
	46	};
	47
	48
	49	struct ipv6_opt_hdr {
	50	__u8 nexthdr;
	51	__u8 hdrlen;
	52	/*
	53	* TLV encoded option data follows.
	54	*/
	55	};
	56
	57	#define ipv6_destopt_hdr ipv6_opt_hdr
	58	#define ipv6_hopopt_hdr ipv6_opt_hdr
	59
	60	#ifdef __KERNEL__
	61	#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
	62	#endif
	63
	64	/*
	65	* routing header type 0 (used in cmsghdr struct)
	66	*/
	67
68	struct rt0_hdr {
69	struct ipv6_rt_hdr rt_hdr;
e6df439b	70	__u32 reserved;
1da177e4 LT	71	struct in6_addr addr[0];
	72
	73	#define rt0_type rt_hdr.type
	74	};
	75
	76	struct ipv6_auth_hdr {
	77	__u8 nexthdr;
	78	__u8 hdrlen; /* This one is measured in 32 bit units! */
	79	__u16 reserved;
	80	__u32 spi;
	81	__u32 seq_no; /* Sequence number */
	82	__u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
	83	};
	84
	85	struct ipv6_esp_hdr {
	86	__u32 spi;
	87	__u32 seq_no; /* Sequence number */
	88	__u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
	89	};
	90
	91	struct ipv6_comp_hdr {
	92	__u8 nexthdr;
	93	__u8 flags;
	94	__u16 cpi;
	95	};
	96
	97	/*
	98	* IPv6 fixed header
	99	*
	100	* BEWARE, it is incorrect. The first 4 bits of flow_lbl
	101	* are glued to priority now, forming "class".
	102	*/
	103
	104	struct ipv6hdr {
	105	#if defined(__LITTLE_ENDIAN_BITFIELD)
	106	__u8 priority:4,
	107	version:4;
	108	#elif defined(__BIG_ENDIAN_BITFIELD)
	109	__u8 version:4,
	110	priority:4;
	111	#else
	112	#error "Please fix <asm/byteorder.h>"
	113	#endif
	114	__u8 flow_lbl[3];
	115
	116	__u16 payload_len;
	117	__u8 nexthdr;
	118	__u8 hop_limit;
	119
	120	struct in6_addr saddr;
	121	struct in6_addr daddr;
	122	};
	123
	124	/*
	125	* This structure contains configuration options per IPv6 link.
	126	*/
	127	struct ipv6_devconf {
	128	__s32 forwarding;
	129	__s32 hop_limit;
	130	__s32 mtu6;
	131	__s32 accept_ra;
	132	__s32 accept_redirects;
	133	__s32 autoconf;
	134	__s32 dad_transmits;
135	__s32 rtr_solicits;
136	__s32 rtr_solicit_interval;
137	__s32 rtr_solicit_delay;
138	__s32 force_mld_version;
139	#ifdef CONFIG_IPV6_PRIVACY
140	__s32 use_tempaddr;
141	__s32 temp_valid_lft;
142	__s32 temp_prefered_lft;
143	__s32 regen_max_retry;
144	__s32 max_desync_factor;
145	#endif
146	__s32 max_addresses;
65f5c7c1	147	__s32 accept_ra_defrtr;
c4fd30eb	148	__s32 accept_ra_pinfo;
930d6ff2 YH	149	#ifdef CONFIG_IPV6_ROUTER_PREF
930d6ff2 YH	150	__s32 accept_ra_rtr_pref;
52e16356	151	__s32 rtr_probe_interval;
09c884d4 YH	152	#ifdef CONFIG_IPV6_ROUTE_INFO
	153	__s32 accept_ra_rt_info_max_plen;
	154	#endif
930d6ff2	155	#endif
1da177e4 LT	156	void *sysctl;
	157	};
	158
	159	/* index values for the variables in ipv6_devconf */
	160	enum {
	161	DEVCONF_FORWARDING = 0,
	162	DEVCONF_HOPLIMIT,
	163	DEVCONF_MTU6,
	164	DEVCONF_ACCEPT_RA,
	165	DEVCONF_ACCEPT_REDIRECTS,
	166	DEVCONF_AUTOCONF,
	167	DEVCONF_DAD_TRANSMITS,
	168	DEVCONF_RTR_SOLICITS,
	169	DEVCONF_RTR_SOLICIT_INTERVAL,
	170	DEVCONF_RTR_SOLICIT_DELAY,
	171	DEVCONF_USE_TEMPADDR,
	172	DEVCONF_TEMP_VALID_LFT,
	173	DEVCONF_TEMP_PREFERED_LFT,
	174	DEVCONF_REGEN_MAX_RETRY,
	175	DEVCONF_MAX_DESYNC_FACTOR,
	176	DEVCONF_MAX_ADDRESSES,
	177	DEVCONF_FORCE_MLD_VERSION,
65f5c7c1	178	DEVCONF_ACCEPT_RA_DEFRTR,
c4fd30eb	179	DEVCONF_ACCEPT_RA_PINFO,
930d6ff2	180	DEVCONF_ACCEPT_RA_RTR_PREF,
52e16356	181	DEVCONF_RTR_PROBE_INTERVAL,
09c884d4	182	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
1da177e4 LT	183	DEVCONF_MAX
	184	};
	185
	186	#ifdef __KERNEL__
1da177e4	187	#include <linux/icmpv6.h>
1da177e4 LT	188	#include <linux/tcp.h>
	189	#include <linux/udp.h>
	190
14c85021 ACM	191	#include <net/if_inet6.h> /* struct ipv6_mc_socklist */
	192	#include <net/inet_sock.h>
	193
1da177e4 LT	194	/*
	195	This structure contains results of exthdrs parsing
	196	as offsets from skb->nh.
	197	*/
	198
	199	struct inet6_skb_parm {
	200	int iif;
	201	__u16 ra;
	202	__u16 hop;
	203	__u16 dst0;
	204	__u16 srcrt;
	205	__u16 dst1;
333fad53	206	__u16 lastopt;
951dbc8a	207	__u32 nhoff;
3e3850e9 PM	208	__u16 flags;
	209
	210	#define IP6SKB_XFRM_TRANSFORMED 1
1da177e4 LT	211	};
	212
	213	#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
	214
505cbfc5 ACM	215	static inline int inet6_iif(const struct sk_buff *skb)
	216	{
	217	return IP6CB(skb)->iif;
	218	}
	219
ca304b61	220	struct inet6_request_sock {
2e6599cb ACM	221	struct in6_addr loc_addr;
	222	struct in6_addr rmt_addr;
	223	struct sk_buff *pktopts;
	224	int iif;
	225	};
	226
ca304b61 ACM	227	struct tcp6_request_sock {
	228	struct tcp_request_sock tcp6rsk_tcp;
	229	struct inet6_request_sock tcp6rsk_inet6;
	230	};
2e6599cb	231
1da177e4 LT	232	/**
	233	* struct ipv6_pinfo - ipv6 private area
	234	*
	235	* In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
	236	* this _must_ be the last member, so that inet6_sk_generic
	237	* is able to calculate its offset from the base struct sock
	238	* by using the struct proto->slab_obj_size member. -acme
	239	*/
	240	struct ipv6_pinfo {
	241	struct in6_addr saddr;
	242	struct in6_addr rcv_saddr;
	243	struct in6_addr daddr;
	244	struct in6_addr *daddr_cache;
8e1ef0a9 YH	245	#ifdef CONFIG_IPV6_SUBTREES
	246	struct in6_addr *saddr_cache;
	247	#endif
1da177e4 LT	248
	249	__u32 flow_label;
	250	__u32 frag_size;
	251	__s16 hop_limit;
	252	__s16 mcast_hops;
	253	int mcast_oif;
	254
	255	/* pktoption flags */
	256	union {
	257	struct {
333fad53 YH	258	__u16 srcrt:2,
333fad53 YH	259	osrcrt:2,
1da177e4	260	rxinfo:1,
333fad53	261	rxoinfo:1,
1da177e4	262	rxhlim:1,
333fad53	263	rxohlim:1,
1da177e4	264	hopopts:1,
333fad53	265	ohopopts:1,
1da177e4	266	dstopts:1,
333fad53	267	odstopts:1,
41a1f8ea YH	268	rxflow:1,
41a1f8ea YH	269	rxtclass:1;
1da177e4	270	} bits;
333fad53	271	__u16 all;
1da177e4 LT	272	} rxopt;
	273
	274	/* sockopt flags */
	275	__u8 mc_loop:1,
	276	recverr:1,
	277	sndflow:1,
	278	pmtudisc:2,
	279	ipv6only:1;
41a1f8ea	280	__u8 tclass;
1da177e4 LT	281
	282	__u32 dst_cookie;
	283
	284	struct ipv6_mc_socklist *ipv6_mc_list;
	285	struct ipv6_ac_socklist *ipv6_ac_list;
	286	struct ipv6_fl_socklist *ipv6_fl_list;
	287
	288	struct ipv6_txoptions *opt;
	289	struct sk_buff *pktoptions;
	290	struct {
	291	struct ipv6_txoptions *opt;
	292	struct rt6_info *rt;
	293	int hop_limit;
41a1f8ea	294	int tclass;
1da177e4 LT	295	} cork;
	296	};
	297
	298	/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
	299	struct raw6_sock {
	300	/* inet_sock has to be the first member of raw6_sock */
	301	struct inet_sock inet;
	302	__u32 checksum; /* perform checksum */
	303	__u32 offset; /* checksum offset */
	304	struct icmp6_filter filter;
	305	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
	306	struct ipv6_pinfo inet6;
	307	};
	308
	309	struct udp6_sock {
	310	struct udp_sock udp;
	311	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
	312	struct ipv6_pinfo inet6;
	313	};
	314
	315	struct tcp6_sock {
	316	struct tcp_sock tcp;
	317	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
	318	struct ipv6_pinfo inet6;
	319	};
	320
b9750ce1 ACM	321	extern int inet6_sk_rebuild_header(struct sock *sk);
b9750ce1 ACM	322
1da177e4 LT	323	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	324	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	325	{
	326	return inet_sk(__sk)->pinet6;
	327	}
	328
ca304b61 ACM	329	static inline struct inet6_request_sock *
	330	inet6_rsk(const struct request_sock *rsk)
	331	{
	332	return (struct inet6_request_sock )(((u8 )rsk) +
	333	inet_rsk(rsk)->inet6_rsk_offset);
	334	}
	335
	336	static inline u32 inet6_rsk_offset(struct request_sock *rsk)
	337	{
	338	return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
	339	}
	340
	341	static inline struct request_sock inet6_reqsk_alloc(struct request_sock_ops ops)
	342	{
	343	struct request_sock *req = reqsk_alloc(ops);
	344
	345	if (req != NULL)
	346	inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
	347
	348	return req;
	349	}
	350
1da177e4 LT	351	static inline struct raw6_sock raw6_sk(const struct sock sk)
	352	{
	353	return (struct raw6_sock *)sk;
	354	}
	355
	356	static inline void inet_sk_copy_descendant(struct sock *sk_to,
	357	const struct sock *sk_from)
	358	{
	359	int ancestor_size = sizeof(struct inet_sock);
	360
	361	if (sk_from->sk_family == PF_INET6)
	362	ancestor_size += sizeof(struct ipv6_pinfo);
	363
	364	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
	365	}
	366
	367	#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
	368	#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
8feaf0c0	369
0fa1a53e ACM	370	struct inet6_timewait_sock {
	371	struct in6_addr tw_v6_daddr;
	372	struct in6_addr tw_v6_rcv_saddr;
	373	};
	374
8feaf0c0	375	struct tcp6_timewait_sock {
0fa1a53e ACM	376	struct tcp_timewait_sock tcp6tw_tcp;
0fa1a53e ACM	377	struct inet6_timewait_sock tcp6tw_inet6;
8feaf0c0 ACM	378	};
8feaf0c0 ACM	379
0fa1a53e ACM	380	static inline u16 inet6_tw_offset(const struct proto *prot)
0fa1a53e ACM	381	{
6d6ee43e ACM	382	return prot->twsk_prot->twsk_obj_size -
6d6ee43e ACM	383	sizeof(struct inet6_timewait_sock);
0fa1a53e ACM	384	}
	385
	386	static inline struct inet6_timewait_sock inet6_twsk(const struct sock sk)
8feaf0c0	387	{
0fa1a53e ACM	388	return (struct inet6_timewait_sock )(((u8 )sk) +
0fa1a53e ACM	389	inet_twsk(sk)->tw_ipv6_offset);
8feaf0c0 ACM	390	}
8feaf0c0 ACM	391
0fa1a53e	392	static inline struct in6_addr __inet6_rcv_saddr(const struct sock sk)
8feaf0c0 ACM	393	{
8feaf0c0 ACM	394	return likely(sk->sk_state != TCP_TIME_WAIT) ?
0fa1a53e	395	&inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
8feaf0c0 ACM	396	}
8feaf0c0 ACM	397
0fa1a53e	398	static inline struct in6_addr inet6_rcv_saddr(const struct sock sk)
8feaf0c0	399	{
0fa1a53e	400	return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
8feaf0c0 ACM	401	}
8feaf0c0 ACM	402
463c84b9	403	static inline int inet_v6_ipv6only(const struct sock *sk)
8feaf0c0 ACM	404	{
8feaf0c0 ACM	405	return likely(sk->sk_state != TCP_TIME_WAIT) ?
3f421baa	406	ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
8feaf0c0	407	}
1da177e4 LT	408	#else
	409	#define __ipv6_only_sock(sk) 0
	410	#define ipv6_only_sock(sk) 0
	411
	412	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	413	{
	414	return NULL;
	415	}
	416
ca304b61 ACM	417	static inline struct inet6_request_sock *
	418	inet6_rsk(const struct request_sock *rsk)
	419	{
	420	return NULL;
	421	}
	422
1da177e4 LT	423	static inline struct raw6_sock raw6_sk(const struct sock sk)
	424	{
	425	return NULL;
	426	}
	427
0fa1a53e ACM	428	#define __inet6_rcv_saddr(__sk) NULL
0fa1a53e ACM	429	#define inet6_rcv_saddr(__sk) NULL
8feaf0c0	430	#define tcp_twsk_ipv6only(__sk) 0
463c84b9	431	#define inet_v6_ipv6only(__sk) 0
8feaf0c0	432	#endif /* defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE) */
1da177e4	433
81c3d547 ED	434	#define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
	435	(((__sk)->sk_hash == (__hash)) && \
	436	((((__u32 )&(inet_sk(__sk)->dport))) == (__ports)) && \
8feaf0c0 ACM	437	((__sk)->sk_family == AF_INET6) && \
	438	ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
	439	ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
	440	(!((__sk)->sk_bound_dev_if) \|\| ((__sk)->sk_bound_dev_if == (__dif))))
1da177e4	441
8feaf0c0 ACM	442	#endif /* __KERNEL__ */
	443
	444	#endif /* _IPV6_H */