[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;
};

/*
 * 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;
};

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