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