[linux.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	*/
#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.
	 */
};

#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__));

struct ipv6_auth_hdr {
	__u8  nexthdr;
	__u8  hdrlen;           /* This one is measured in 32 bit units! */
	__be16 reserved;
	__be32 spi;
	__be32 seq_no;           /* Sequence number */
	__u8  auth_data[0];     /* Length variable but >=4. Mind the 64 bit alignment! */
};

struct ipv6_esp_hdr {
	__be32 spi;
	__be32 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;
	__be16 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];

	__be16			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
	__s32		proxy_ndp;
	__s32		accept_source_route;
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	__s32		optimistic_dad;
#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_PROXY_NDP,
	__DEVCONF_OPTIMISTIC_DAD,
	DEVCONF_ACCEPT_SOURCE_ROUTE,
	DEVCONF_OPTIMISTIC_DAD,
	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>

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;
#ifdef CONFIG_IPV6_MIP6
	__u16			dsthao;
#endif

#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

	__be32			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))				&& \
	 ((*((__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))))

#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 */
642ec62e	32	#define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
1da177e4 LT	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
642ec62e NT	77	/*
	78	* routing header type 2
	79	*/
	80
	81	struct rt2_hdr {
	82	struct ipv6_rt_hdr rt_hdr;
	83	__u32 reserved;
	84	struct in6_addr addr;
	85
	86	#define rt2_type rt_hdr.type
	87	};
	88
842426e7 NT	89	/*
	90	* home address option in destination options header
	91	*/
	92
	93	struct ipv6_destopt_hao {
	94	__u8 type;
	95	__u8 length;
	96	struct in6_addr addr;
	97	} __attribute__ ((__packed__));
	98
1da177e4 LT	99	struct ipv6_auth_hdr {
	100	__u8 nexthdr;
	101	__u8 hdrlen; /* This one is measured in 32 bit units! */
43505077 AV	102	__be16 reserved;
	103	__be32 spi;
	104	__be32 seq_no; /* Sequence number */
1da177e4 LT	105	__u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
	106	};
	107
	108	struct ipv6_esp_hdr {
43505077 AV	109	__be32 spi;
43505077 AV	110	__be32 seq_no; /* Sequence number */
1da177e4 LT	111	__u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
	112	};
	113
	114	struct ipv6_comp_hdr {
	115	__u8 nexthdr;
	116	__u8 flags;
43505077	117	__be16 cpi;
1da177e4 LT	118	};
	119
	120	/*
	121	* IPv6 fixed header
	122	*
	123	* BEWARE, it is incorrect. The first 4 bits of flow_lbl
	124	* are glued to priority now, forming "class".
	125	*/
	126
	127	struct ipv6hdr {
	128	#if defined(__LITTLE_ENDIAN_BITFIELD)
	129	__u8 priority:4,
	130	version:4;
	131	#elif defined(__BIG_ENDIAN_BITFIELD)
	132	__u8 version:4,
	133	priority:4;
	134	#else
	135	#error "Please fix <asm/byteorder.h>"
	136	#endif
	137	__u8 flow_lbl[3];
	138
43505077	139	__be16 payload_len;
1da177e4 LT	140	__u8 nexthdr;
	141	__u8 hop_limit;
	142
	143	struct in6_addr saddr;
	144	struct in6_addr daddr;
	145	};
	146
	147	/*
	148	* This structure contains configuration options per IPv6 link.
	149	*/
	150	struct ipv6_devconf {
	151	__s32 forwarding;
	152	__s32 hop_limit;
	153	__s32 mtu6;
	154	__s32 accept_ra;
	155	__s32 accept_redirects;
	156	__s32 autoconf;
	157	__s32 dad_transmits;
	158	__s32 rtr_solicits;
	159	__s32 rtr_solicit_interval;
	160	__s32 rtr_solicit_delay;
	161	__s32 force_mld_version;
	162	#ifdef CONFIG_IPV6_PRIVACY
	163	__s32 use_tempaddr;
	164	__s32 temp_valid_lft;
	165	__s32 temp_prefered_lft;
	166	__s32 regen_max_retry;
	167	__s32 max_desync_factor;
	168	#endif
	169	__s32 max_addresses;
65f5c7c1	170	__s32 accept_ra_defrtr;
c4fd30eb	171	__s32 accept_ra_pinfo;
930d6ff2 YH	172	#ifdef CONFIG_IPV6_ROUTER_PREF
930d6ff2 YH	173	__s32 accept_ra_rtr_pref;
52e16356	174	__s32 rtr_probe_interval;
09c884d4 YH	175	#ifdef CONFIG_IPV6_ROUTE_INFO
	176	__s32 accept_ra_rt_info_max_plen;
	177	#endif
930d6ff2	178	#endif
fbea49e1	179	__s32 proxy_ndp;
0bcbc926	180	__s32 accept_source_route;
95c385b4 NH	181	#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	182	__s32 optimistic_dad;
	183	#endif
1da177e4 LT	184	void *sysctl;
	185	};
	186
	187	/* index values for the variables in ipv6_devconf */
	188	enum {
	189	DEVCONF_FORWARDING = 0,
	190	DEVCONF_HOPLIMIT,
	191	DEVCONF_MTU6,
	192	DEVCONF_ACCEPT_RA,
	193	DEVCONF_ACCEPT_REDIRECTS,
	194	DEVCONF_AUTOCONF,
	195	DEVCONF_DAD_TRANSMITS,
	196	DEVCONF_RTR_SOLICITS,
	197	DEVCONF_RTR_SOLICIT_INTERVAL,
	198	DEVCONF_RTR_SOLICIT_DELAY,
	199	DEVCONF_USE_TEMPADDR,
	200	DEVCONF_TEMP_VALID_LFT,
	201	DEVCONF_TEMP_PREFERED_LFT,
	202	DEVCONF_REGEN_MAX_RETRY,
	203	DEVCONF_MAX_DESYNC_FACTOR,
	204	DEVCONF_MAX_ADDRESSES,
	205	DEVCONF_FORCE_MLD_VERSION,
65f5c7c1	206	DEVCONF_ACCEPT_RA_DEFRTR,
c4fd30eb	207	DEVCONF_ACCEPT_RA_PINFO,
930d6ff2	208	DEVCONF_ACCEPT_RA_RTR_PREF,
52e16356	209	DEVCONF_RTR_PROBE_INTERVAL,
09c884d4	210	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
fbea49e1	211	DEVCONF_PROXY_NDP,
0bcbc926 YH	212	__DEVCONF_OPTIMISTIC_DAD,
0bcbc926 YH	213	DEVCONF_ACCEPT_SOURCE_ROUTE,
95c385b4	214	DEVCONF_OPTIMISTIC_DAD,
1da177e4 LT	215	DEVCONF_MAX
	216	};
	217
	218	#ifdef __KERNEL__
1da177e4	219	#include <linux/icmpv6.h>
1da177e4 LT	220	#include <linux/tcp.h>
	221	#include <linux/udp.h>
	222
14c85021 ACM	223	#include <net/if_inet6.h> /* struct ipv6_mc_socklist */
	224	#include <net/inet_sock.h>
	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
1da177e4 LT	236	/*
	237	This structure contains results of exthdrs parsing
	238	as offsets from skb->nh.
	239	*/
	240
	241	struct inet6_skb_parm {
	242	int iif;
	243	__u16 ra;
	244	__u16 hop;
	245	__u16 dst0;
	246	__u16 srcrt;
	247	__u16 dst1;
333fad53	248	__u16 lastopt;
951dbc8a	249	__u32 nhoff;
3e3850e9	250	__u16 flags;
8dd7368d DM	251	#ifdef CONFIG_IPV6_MIP6
	252	__u16 dsthao;
	253	#endif
3e3850e9 PM	254
3e3850e9 PM	255	#define IP6SKB_XFRM_TRANSFORMED 1
1da177e4 LT	256	};
	257
	258	#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
	259
505cbfc5 ACM	260	static inline int inet6_iif(const struct sk_buff *skb)
	261	{
	262	return IP6CB(skb)->iif;
	263	}
	264
ca304b61	265	struct inet6_request_sock {
2e6599cb ACM	266	struct in6_addr loc_addr;
	267	struct in6_addr rmt_addr;
	268	struct sk_buff *pktopts;
	269	int iif;
	270	};
	271
ca304b61 ACM	272	struct tcp6_request_sock {
	273	struct tcp_request_sock tcp6rsk_tcp;
	274	struct inet6_request_sock tcp6rsk_inet6;
	275	};
2e6599cb	276
1da177e4 LT	277	/**
	278	* struct ipv6_pinfo - ipv6 private area
	279	*
	280	* In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
	281	* this _must_ be the last member, so that inet6_sk_generic
	282	* is able to calculate its offset from the base struct sock
	283	* by using the struct proto->slab_obj_size member. -acme
	284	*/
	285	struct ipv6_pinfo {
	286	struct in6_addr saddr;
	287	struct in6_addr rcv_saddr;
	288	struct in6_addr daddr;
	289	struct in6_addr *daddr_cache;
8e1ef0a9 YH	290	#ifdef CONFIG_IPV6_SUBTREES
	291	struct in6_addr *saddr_cache;
	292	#endif
1da177e4	293
90bcaf7b	294	__be32 flow_label;
1da177e4 LT	295	__u32 frag_size;
	296	__s16 hop_limit;
	297	__s16 mcast_hops;
	298	int mcast_oif;
	299
	300	/* pktoption flags */
	301	union {
	302	struct {
333fad53 YH	303	__u16 srcrt:2,
333fad53 YH	304	osrcrt:2,
1da177e4	305	rxinfo:1,
333fad53	306	rxoinfo:1,
1da177e4	307	rxhlim:1,
333fad53	308	rxohlim:1,
1da177e4	309	hopopts:1,
333fad53	310	ohopopts:1,
1da177e4	311	dstopts:1,
333fad53	312	odstopts:1,
41a1f8ea YH	313	rxflow:1,
41a1f8ea YH	314	rxtclass:1;
1da177e4	315	} bits;
333fad53	316	__u16 all;
1da177e4 LT	317	} rxopt;
	318
	319	/* sockopt flags */
	320	__u8 mc_loop:1,
	321	recverr:1,
	322	sndflow:1,
	323	pmtudisc:2,
	324	ipv6only:1;
41a1f8ea	325	__u8 tclass;
1da177e4 LT	326
	327	__u32 dst_cookie;
	328
	329	struct ipv6_mc_socklist *ipv6_mc_list;
	330	struct ipv6_ac_socklist *ipv6_ac_list;
	331	struct ipv6_fl_socklist *ipv6_fl_list;
	332
	333	struct ipv6_txoptions *opt;
	334	struct sk_buff *pktoptions;
	335	struct {
	336	struct ipv6_txoptions *opt;
	337	struct rt6_info *rt;
	338	int hop_limit;
41a1f8ea	339	int tclass;
1da177e4 LT	340	} cork;
	341	};
	342
	343	/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
	344	struct raw6_sock {
	345	/* inet_sock has to be the first member of raw6_sock */
	346	struct inet_sock inet;
	347	__u32 checksum; /* perform checksum */
	348	__u32 offset; /* checksum offset */
	349	struct icmp6_filter filter;
	350	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
	351	struct ipv6_pinfo inet6;
	352	};
	353
	354	struct udp6_sock {
	355	struct udp_sock udp;
	356	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
	357	struct ipv6_pinfo inet6;
	358	};
	359
	360	struct tcp6_sock {
	361	struct tcp_sock tcp;
	362	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
	363	struct ipv6_pinfo inet6;
	364	};
	365
b9750ce1 ACM	366	extern int inet6_sk_rebuild_header(struct sock *sk);
b9750ce1 ACM	367
1da177e4 LT	368	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	369	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	370	{
	371	return inet_sk(__sk)->pinet6;
	372	}
	373
ca304b61 ACM	374	static inline struct inet6_request_sock *
	375	inet6_rsk(const struct request_sock *rsk)
	376	{
	377	return (struct inet6_request_sock )(((u8 )rsk) +
	378	inet_rsk(rsk)->inet6_rsk_offset);
	379	}
	380
	381	static inline u32 inet6_rsk_offset(struct request_sock *rsk)
	382	{
	383	return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
	384	}
	385
	386	static inline struct request_sock inet6_reqsk_alloc(struct request_sock_ops ops)
	387	{
	388	struct request_sock *req = reqsk_alloc(ops);
	389
	390	if (req != NULL)
	391	inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
	392
	393	return req;
	394	}
	395
1da177e4 LT	396	static inline struct raw6_sock raw6_sk(const struct sock sk)
	397	{
	398	return (struct raw6_sock *)sk;
	399	}
	400
	401	static inline void inet_sk_copy_descendant(struct sock *sk_to,
	402	const struct sock *sk_from)
	403	{
	404	int ancestor_size = sizeof(struct inet_sock);
	405
	406	if (sk_from->sk_family == PF_INET6)
	407	ancestor_size += sizeof(struct ipv6_pinfo);
	408
	409	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
	410	}
	411
	412	#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
	413	#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
8feaf0c0	414
0fa1a53e ACM	415	struct inet6_timewait_sock {
	416	struct in6_addr tw_v6_daddr;
	417	struct in6_addr tw_v6_rcv_saddr;
	418	};
	419
8feaf0c0	420	struct tcp6_timewait_sock {
0fa1a53e ACM	421	struct tcp_timewait_sock tcp6tw_tcp;
0fa1a53e ACM	422	struct inet6_timewait_sock tcp6tw_inet6;
8feaf0c0 ACM	423	};
8feaf0c0 ACM	424
0fa1a53e ACM	425	static inline u16 inet6_tw_offset(const struct proto *prot)
0fa1a53e ACM	426	{
6d6ee43e ACM	427	return prot->twsk_prot->twsk_obj_size -
6d6ee43e ACM	428	sizeof(struct inet6_timewait_sock);
0fa1a53e ACM	429	}
	430
	431	static inline struct inet6_timewait_sock inet6_twsk(const struct sock sk)
8feaf0c0	432	{
0fa1a53e ACM	433	return (struct inet6_timewait_sock )(((u8 )sk) +
0fa1a53e ACM	434	inet_twsk(sk)->tw_ipv6_offset);
8feaf0c0 ACM	435	}
8feaf0c0 ACM	436
0fa1a53e	437	static inline struct in6_addr __inet6_rcv_saddr(const struct sock sk)
8feaf0c0 ACM	438	{
8feaf0c0 ACM	439	return likely(sk->sk_state != TCP_TIME_WAIT) ?
0fa1a53e	440	&inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
8feaf0c0 ACM	441	}
8feaf0c0 ACM	442
0fa1a53e	443	static inline struct in6_addr inet6_rcv_saddr(const struct sock sk)
8feaf0c0	444	{
0fa1a53e	445	return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
8feaf0c0 ACM	446	}
8feaf0c0 ACM	447
463c84b9	448	static inline int inet_v6_ipv6only(const struct sock *sk)
8feaf0c0 ACM	449	{
8feaf0c0 ACM	450	return likely(sk->sk_state != TCP_TIME_WAIT) ?
3f421baa	451	ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
8feaf0c0	452	}
1da177e4 LT	453	#else
	454	#define __ipv6_only_sock(sk) 0
	455	#define ipv6_only_sock(sk) 0
	456
	457	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	458	{
	459	return NULL;
	460	}
	461
ca304b61 ACM	462	static inline struct inet6_request_sock *
	463	inet6_rsk(const struct request_sock *rsk)
	464	{
	465	return NULL;
	466	}
	467
1da177e4 LT	468	static inline struct raw6_sock raw6_sk(const struct sock sk)
	469	{
	470	return NULL;
	471	}
	472
0fa1a53e ACM	473	#define __inet6_rcv_saddr(__sk) NULL
0fa1a53e ACM	474	#define inet6_rcv_saddr(__sk) NULL
8feaf0c0	475	#define tcp_twsk_ipv6only(__sk) 0
463c84b9	476	#define inet_v6_ipv6only(__sk) 0
8feaf0c0	477	#endif /* defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE) */
1da177e4	478
81c3d547 ED	479	#define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
81c3d547 ED	480	(((__sk)->sk_hash == (__hash)) && \
4f765d84	481	((((__portpair )&(inet_sk(__sk)->dport))) == (__ports)) && \
8feaf0c0 ACM	482	((__sk)->sk_family == AF_INET6) && \
	483	ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
	484	ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
	485	(!((__sk)->sk_bound_dev_if) \|\| ((__sk)->sk_bound_dev_if == (__dif))))
1da177e4	486
8feaf0c0 ACM	487	#endif /* __KERNEL__ */
	488
	489	#endif /* _IPV6_H */