[net-next-2.6.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 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;
	void		*sysctl;
};
#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_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);
}

/* 
   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;
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
	__u16			dsthao;
#endif

#define IP6SKB_XFRM_TRANSFORMED	1
#define IP6SKB_FORWARDED	2
};

#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_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;
	struct in6_addr		*daddr_cache;
#ifdef CONFIG_IPV6_SUBTREES
	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			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;
		} bits;
		__u16		all;
	} rxopt;

	/* sockopt flags */
	__u8			recverr:1,
	                        sndflow:1,
				pmtudisc:2,
				ipv6only:1,
				srcprefs:3;	/* 001: prefer temporary address
						 * 010: prefer public address
						 * 100: prefer care-of address
						 */
	__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;
		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;
	/* 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);
		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))

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, __net, __hash, __saddr, __daddr, __ports, __dif)\
	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net)	&& \
	 ((*((__portpair *)&(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))))

#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
	24
	25	struct in6_ifreq {
	26	struct in6_addr ifr6_addr;
	27	__u32 ifr6_prefixlen;
	28	int ifr6_ifindex;
	29	};
	30
bb4dbf9e YH	31	#define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
bb4dbf9e YH	32	#define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
642ec62e	33	#define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
1da177e4 LT	34
	35	/*
	36	* routing header
	37	*/
	38	struct ipv6_rt_hdr {
	39	__u8 nexthdr;
	40	__u8 hdrlen;
	41	__u8 type;
	42	__u8 segments_left;
	43
	44	/*
	45	* type specific data
	46	* variable length field
	47	*/
	48	};
	49
	50
	51	struct ipv6_opt_hdr {
	52	__u8 nexthdr;
	53	__u8 hdrlen;
	54	/*
	55	* TLV encoded option data follows.
	56	*/
7cd636fe	57	} __attribute__ ((packed)); /* required for some archs */
1da177e4 LT	58
	59	#define ipv6_destopt_hdr ipv6_opt_hdr
	60	#define ipv6_hopopt_hdr ipv6_opt_hdr
	61
	62	#ifdef __KERNEL__
	63	#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
	64	#endif
	65
	66	/*
	67	* routing header type 0 (used in cmsghdr struct)
	68	*/
	69
	70	struct rt0_hdr {
	71	struct ipv6_rt_hdr rt_hdr;
e6df439b	72	__u32 reserved;
1da177e4 LT	73	struct in6_addr addr[0];
	74
	75	#define rt0_type rt_hdr.type
	76	};
	77
642ec62e NT	78	/*
	79	* routing header type 2
	80	*/
	81
	82	struct rt2_hdr {
	83	struct ipv6_rt_hdr rt_hdr;
	84	__u32 reserved;
	85	struct in6_addr addr;
	86
	87	#define rt2_type rt_hdr.type
	88	};
	89
842426e7 NT	90	/*
	91	* home address option in destination options header
	92	*/
	93
	94	struct ipv6_destopt_hao {
	95	__u8 type;
	96	__u8 length;
	97	struct in6_addr addr;
	98	} __attribute__ ((__packed__));
	99
1da177e4 LT	100	/*
	101	* IPv6 fixed header
	102	*
	103	* BEWARE, it is incorrect. The first 4 bits of flow_lbl
	104	* are glued to priority now, forming "class".
	105	*/
	106
	107	struct ipv6hdr {
	108	#if defined(__LITTLE_ENDIAN_BITFIELD)
	109	__u8 priority:4,
	110	version:4;
	111	#elif defined(__BIG_ENDIAN_BITFIELD)
	112	__u8 version:4,
	113	priority:4;
	114	#else
	115	#error "Please fix <asm/byteorder.h>"
	116	#endif
	117	__u8 flow_lbl[3];
	118
43505077	119	__be16 payload_len;
1da177e4 LT	120	__u8 nexthdr;
	121	__u8 hop_limit;
	122
	123	struct in6_addr saddr;
	124	struct in6_addr daddr;
	125	};
	126
ebb36a97	127	#ifdef __KERNEL__
1da177e4 LT	128	/*
	129	* This structure contains configuration options per IPv6 link.
	130	*/
	131	struct ipv6_devconf {
	132	__s32 forwarding;
	133	__s32 hop_limit;
	134	__s32 mtu6;
	135	__s32 accept_ra;
	136	__s32 accept_redirects;
	137	__s32 autoconf;
	138	__s32 dad_transmits;
	139	__s32 rtr_solicits;
	140	__s32 rtr_solicit_interval;
	141	__s32 rtr_solicit_delay;
	142	__s32 force_mld_version;
	143	#ifdef CONFIG_IPV6_PRIVACY
	144	__s32 use_tempaddr;
	145	__s32 temp_valid_lft;
	146	__s32 temp_prefered_lft;
	147	__s32 regen_max_retry;
	148	__s32 max_desync_factor;
	149	#endif
	150	__s32 max_addresses;
65f5c7c1	151	__s32 accept_ra_defrtr;
c4fd30eb	152	__s32 accept_ra_pinfo;
930d6ff2 YH	153	#ifdef CONFIG_IPV6_ROUTER_PREF
930d6ff2 YH	154	__s32 accept_ra_rtr_pref;
52e16356	155	__s32 rtr_probe_interval;
09c884d4 YH	156	#ifdef CONFIG_IPV6_ROUTE_INFO
	157	__s32 accept_ra_rt_info_max_plen;
	158	#endif
930d6ff2	159	#endif
fbea49e1	160	__s32 proxy_ndp;
0bcbc926	161	__s32 accept_source_route;
95c385b4 NH	162	#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
95c385b4 NH	163	__s32 optimistic_dad;
7bc570c8 YH	164	#endif
	165	#ifdef CONFIG_IPV6_MROUTE
	166	__s32 mc_forwarding;
95c385b4	167	#endif
778d80be	168	__s32 disable_ipv6;
1b34be74	169	__s32 accept_dad;
1da177e4 LT	170	void *sysctl;
1da177e4 LT	171	};
ebb36a97	172	#endif
1da177e4 LT	173
	174	/* index values for the variables in ipv6_devconf */
	175	enum {
	176	DEVCONF_FORWARDING = 0,
	177	DEVCONF_HOPLIMIT,
	178	DEVCONF_MTU6,
	179	DEVCONF_ACCEPT_RA,
	180	DEVCONF_ACCEPT_REDIRECTS,
	181	DEVCONF_AUTOCONF,
	182	DEVCONF_DAD_TRANSMITS,
	183	DEVCONF_RTR_SOLICITS,
	184	DEVCONF_RTR_SOLICIT_INTERVAL,
	185	DEVCONF_RTR_SOLICIT_DELAY,
	186	DEVCONF_USE_TEMPADDR,
	187	DEVCONF_TEMP_VALID_LFT,
	188	DEVCONF_TEMP_PREFERED_LFT,
	189	DEVCONF_REGEN_MAX_RETRY,
	190	DEVCONF_MAX_DESYNC_FACTOR,
	191	DEVCONF_MAX_ADDRESSES,
	192	DEVCONF_FORCE_MLD_VERSION,
65f5c7c1	193	DEVCONF_ACCEPT_RA_DEFRTR,
c4fd30eb	194	DEVCONF_ACCEPT_RA_PINFO,
930d6ff2	195	DEVCONF_ACCEPT_RA_RTR_PREF,
52e16356	196	DEVCONF_RTR_PROBE_INTERVAL,
09c884d4	197	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
fbea49e1	198	DEVCONF_PROXY_NDP,
95c385b4	199	DEVCONF_OPTIMISTIC_DAD,
4540250b	200	DEVCONF_ACCEPT_SOURCE_ROUTE,
7bc570c8	201	DEVCONF_MC_FORWARDING,
778d80be	202	DEVCONF_DISABLE_IPV6,
1b34be74	203	DEVCONF_ACCEPT_DAD,
1da177e4 LT	204	DEVCONF_MAX
	205	};
	206
	207	#ifdef __KERNEL__
1da177e4	208	#include <linux/icmpv6.h>
1da177e4 LT	209	#include <linux/tcp.h>
	210	#include <linux/udp.h>
	211
14c85021 ACM	212	#include <net/inet_sock.h>
14c85021 ACM	213
0660e03f ACM	214	static inline struct ipv6hdr ipv6_hdr(const struct sk_buff skb)
	215	{
	216	return (struct ipv6hdr *)skb_network_header(skb);
	217	}
	218
39b89160 ACM	219	static inline struct ipv6hdr ipipv6_hdr(const struct sk_buff skb)
39b89160 ACM	220	{
9c70220b	221	return (struct ipv6hdr *)skb_transport_header(skb);
39b89160 ACM	222	}
39b89160 ACM	223
1da177e4 LT	224	/*
	225	This structure contains results of exthdrs parsing
	226	as offsets from skb->nh.
	227	*/
	228
	229	struct inet6_skb_parm {
	230	int iif;
	231	__u16 ra;
	232	__u16 hop;
	233	__u16 dst0;
	234	__u16 srcrt;
	235	__u16 dst1;
333fad53	236	__u16 lastopt;
951dbc8a	237	__u32 nhoff;
3e3850e9	238	__u16 flags;
59fbb3a6	239	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
8dd7368d DM	240	__u16 dsthao;
8dd7368d DM	241	#endif
3e3850e9 PM	242
3e3850e9 PM	243	#define IP6SKB_XFRM_TRANSFORMED 1
7bc570c8	244	#define IP6SKB_FORWARDED 2
1da177e4 LT	245	};
	246
	247	#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
	248
505cbfc5 ACM	249	static inline int inet6_iif(const struct sk_buff *skb)
	250	{
	251	return IP6CB(skb)->iif;
	252	}
	253
ca304b61	254	struct inet6_request_sock {
2e6599cb ACM	255	struct in6_addr loc_addr;
	256	struct in6_addr rmt_addr;
	257	struct sk_buff *pktopts;
	258	int iif;
	259	};
	260
ca304b61 ACM	261	struct tcp6_request_sock {
	262	struct tcp_request_sock tcp6rsk_tcp;
	263	struct inet6_request_sock tcp6rsk_inet6;
	264	};
2e6599cb	265
20283d84 HX	266	struct ipv6_mc_socklist;
	267	struct ipv6_ac_socklist;
	268	struct ipv6_fl_socklist;
	269
1da177e4 LT	270	/**
	271	* struct ipv6_pinfo - ipv6 private area
	272	*
	273	* In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
	274	* this _must_ be the last member, so that inet6_sk_generic
	275	* is able to calculate its offset from the base struct sock
	276	* by using the struct proto->slab_obj_size member. -acme
	277	*/
	278	struct ipv6_pinfo {
	279	struct in6_addr saddr;
	280	struct in6_addr rcv_saddr;
	281	struct in6_addr daddr;
b24a2516	282	struct in6_pktinfo sticky_pktinfo;
1da177e4	283	struct in6_addr *daddr_cache;
8e1ef0a9 YH	284	#ifdef CONFIG_IPV6_SUBTREES
	285	struct in6_addr *saddr_cache;
	286	#endif
1da177e4	287
90bcaf7b	288	__be32 flow_label;
1da177e4	289	__u32 frag_size;
1d5d236d YH	290
	291	/*
	292	* Packed in 16bits.
	293	* Omit one shift by by putting the signed field at MSB.
	294	*/
	295	#if defined(__BIG_ENDIAN_BITFIELD)
	296	__s16 hop_limit:9;
	297	__u16 __unused_1:7;
	298	#else
	299	__u16 __unused_1:7;
	300	__s16 hop_limit:9;
	301	#endif
	302
	303	#if defined(__BIG_ENDIAN_BITFIELD)
	304	/* Packed in 16bits. */
	305	__s16 mcast_hops:9;
	306	__u16 __unused_2:6,
	307	mc_loop:1;
	308	#else
	309	__u16 mc_loop:1,
	310	__unused_2:6;
	311	__s16 mcast_hops:9;
	312	#endif
1da177e4 LT	313	int mcast_oif;
	314
	315	/* pktoption flags */
	316	union {
	317	struct {
4c752098 YH	318	__u16 srcrt:1,
4c752098 YH	319	osrcrt:1,
1da177e4	320	rxinfo:1,
333fad53	321	rxoinfo:1,
1da177e4	322	rxhlim:1,
333fad53	323	rxohlim:1,
1da177e4	324	hopopts:1,
333fad53	325	ohopopts:1,
1da177e4	326	dstopts:1,
333fad53	327	odstopts:1,
41a1f8ea YH	328	rxflow:1,
41a1f8ea YH	329	rxtclass:1;
1da177e4	330	} bits;
333fad53	331	__u16 all;
1da177e4 LT	332	} rxopt;
	333
	334	/* sockopt flags */
1d5d236d	335	__u8 recverr:1,
1da177e4 LT	336	sndflow:1,
1da177e4 LT	337	pmtudisc:2,
7cbca67c YH	338	ipv6only:1,
	339	srcprefs:3; /* 001: prefer temporary address
	340	* 010: prefer public address
	341	* 100: prefer care-of address
	342	*/
41a1f8ea	343	__u8 tclass;
1da177e4 LT	344
	345	__u32 dst_cookie;
	346
	347	struct ipv6_mc_socklist *ipv6_mc_list;
	348	struct ipv6_ac_socklist *ipv6_ac_list;
	349	struct ipv6_fl_socklist *ipv6_fl_list;
	350
	351	struct ipv6_txoptions *opt;
	352	struct sk_buff *pktoptions;
	353	struct {
	354	struct ipv6_txoptions *opt;
47254745 YH	355	u8 hop_limit;
47254745 YH	356	u8 tclass;
1da177e4 LT	357	} cork;
	358	};
	359
	360	/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
	361	struct raw6_sock {
	362	/* inet_sock has to be the first member of raw6_sock */
	363	struct inet_sock inet;
	364	__u32 checksum; /* perform checksum */
	365	__u32 offset; /* checksum offset */
	366	struct icmp6_filter filter;
	367	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
	368	struct ipv6_pinfo inet6;
	369	};
	370
	371	struct udp6_sock {
	372	struct udp_sock udp;
	373	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
	374	struct ipv6_pinfo inet6;
	375	};
	376
	377	struct tcp6_sock {
	378	struct tcp_sock tcp;
	379	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
	380	struct ipv6_pinfo inet6;
	381	};
	382
b9750ce1 ACM	383	extern int inet6_sk_rebuild_header(struct sock *sk);
b9750ce1 ACM	384
1da177e4 LT	385	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	386	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	387	{
	388	return inet_sk(__sk)->pinet6;
	389	}
	390
ca304b61 ACM	391	static inline struct inet6_request_sock *
	392	inet6_rsk(const struct request_sock *rsk)
	393	{
	394	return (struct inet6_request_sock )(((u8 )rsk) +
	395	inet_rsk(rsk)->inet6_rsk_offset);
	396	}
	397
	398	static inline u32 inet6_rsk_offset(struct request_sock *rsk)
	399	{
	400	return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
	401	}
	402
	403	static inline struct request_sock inet6_reqsk_alloc(struct request_sock_ops ops)
	404	{
	405	struct request_sock *req = reqsk_alloc(ops);
	406
ce4a7d0d	407	if (req != NULL) {
ca304b61	408	inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
ce4a7d0d ACM	409	inet6_rsk(req)->pktopts = NULL;
ce4a7d0d ACM	410	}
ca304b61 ACM	411
	412	return req;
	413	}
	414
1da177e4 LT	415	static inline struct raw6_sock raw6_sk(const struct sock sk)
	416	{
	417	return (struct raw6_sock *)sk;
	418	}
	419
	420	static inline void inet_sk_copy_descendant(struct sock *sk_to,
	421	const struct sock *sk_from)
	422	{
	423	int ancestor_size = sizeof(struct inet_sock);
	424
	425	if (sk_from->sk_family == PF_INET6)
	426	ancestor_size += sizeof(struct ipv6_pinfo);
	427
	428	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
	429	}
	430
	431	#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
	432	#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
8feaf0c0	433
0fa1a53e ACM	434	struct inet6_timewait_sock {
	435	struct in6_addr tw_v6_daddr;
	436	struct in6_addr tw_v6_rcv_saddr;
	437	};
	438
8feaf0c0	439	struct tcp6_timewait_sock {
0fa1a53e ACM	440	struct tcp_timewait_sock tcp6tw_tcp;
0fa1a53e ACM	441	struct inet6_timewait_sock tcp6tw_inet6;
8feaf0c0 ACM	442	};
8feaf0c0 ACM	443
0fa1a53e ACM	444	static inline u16 inet6_tw_offset(const struct proto *prot)
0fa1a53e ACM	445	{
6d6ee43e ACM	446	return prot->twsk_prot->twsk_obj_size -
6d6ee43e ACM	447	sizeof(struct inet6_timewait_sock);
0fa1a53e ACM	448	}
	449
	450	static inline struct inet6_timewait_sock inet6_twsk(const struct sock sk)
8feaf0c0	451	{
0fa1a53e ACM	452	return (struct inet6_timewait_sock )(((u8 )sk) +
0fa1a53e ACM	453	inet_twsk(sk)->tw_ipv6_offset);
8feaf0c0 ACM	454	}
8feaf0c0 ACM	455
0fa1a53e	456	static inline struct in6_addr __inet6_rcv_saddr(const struct sock sk)
8feaf0c0 ACM	457	{
8feaf0c0 ACM	458	return likely(sk->sk_state != TCP_TIME_WAIT) ?
0fa1a53e	459	&inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
8feaf0c0 ACM	460	}
8feaf0c0 ACM	461
0fa1a53e	462	static inline struct in6_addr inet6_rcv_saddr(const struct sock sk)
8feaf0c0	463	{
0fa1a53e	464	return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
8feaf0c0 ACM	465	}
8feaf0c0 ACM	466
463c84b9	467	static inline int inet_v6_ipv6only(const struct sock *sk)
8feaf0c0 ACM	468	{
8feaf0c0 ACM	469	return likely(sk->sk_state != TCP_TIME_WAIT) ?
3f421baa	470	ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
8feaf0c0	471	}
1da177e4 LT	472	#else
	473	#define __ipv6_only_sock(sk) 0
	474	#define ipv6_only_sock(sk) 0
	475
	476	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	477	{
	478	return NULL;
	479	}
	480
ca304b61 ACM	481	static inline struct inet6_request_sock *
	482	inet6_rsk(const struct request_sock *rsk)
	483	{
	484	return NULL;
	485	}
	486
1da177e4 LT	487	static inline struct raw6_sock raw6_sk(const struct sock sk)
	488	{
	489	return NULL;
	490	}
	491
0fa1a53e ACM	492	#define __inet6_rcv_saddr(__sk) NULL
0fa1a53e ACM	493	#define inet6_rcv_saddr(__sk) NULL
8feaf0c0	494	#define tcp_twsk_ipv6only(__sk) 0
463c84b9	495	#define inet_v6_ipv6only(__sk) 0
8feaf0c0	496	#endif /* defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE) */
1da177e4	497
d86e0dac	498	#define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
3b1e0a65	499	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
4f765d84	500	((((__portpair )&(inet_sk(__sk)->dport))) == (__ports)) && \
8feaf0c0 ACM	501	((__sk)->sk_family == AF_INET6) && \
	502	ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
	503	ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
	504	(!((__sk)->sk_bound_dev_if) \|\| ((__sk)->sk_bound_dev_if == (__dif))))
1da177e4	505
d86e0dac	506	#define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
3b1e0a65	507	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
535174ef PE	508	(((__portpair )&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \
	509	((__sk)->sk_family == PF_INET6) && \
	510	(ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \
	511	(ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
	512	(!((__sk)->sk_bound_dev_if) \|\| ((__sk)->sk_bound_dev_if == (__dif))))
	513
8feaf0c0 ACM	514	#endif /* __KERNEL__ */
	515
	516	#endif /* _IPV6_H */