[deliverable/linux.git] / include / linux / ipv6.h

#ifndef _IPV6_H
#define _IPV6_H

#include <uapi/linux/ipv6.h>

#define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)
#define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
/*
 * 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;
	__s32		mldv1_unsolicited_report_interval;
	__s32		mldv2_unsolicited_report_interval;
	__s32		use_tempaddr;
	__s32		temp_valid_lft;
	__s32		temp_prefered_lft;
	__s32		regen_max_retry;
	__s32		max_desync_factor;
	__s32		max_addresses;
	__s32		accept_ra_defrtr;
	__s32		accept_ra_min_hop_limit;
	__s32		accept_ra_pinfo;
	__s32		ignore_routes_with_linkdown;
#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;
	__s32		accept_ra_from_local;
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	__s32		optimistic_dad;
	__s32		use_optimistic;
#endif
#ifdef CONFIG_IPV6_MROUTE
	__s32		mc_forwarding;
#endif
	__s32		disable_ipv6;
	__s32		drop_unicast_in_l2_multicast;
	__s32		accept_dad;
	__s32		force_tllao;
	__s32           ndisc_notify;
	__s32		suppress_frag_ndisc;
	__s32		accept_ra_mtu;
	__s32		drop_unsolicited_na;
	struct ipv6_stable_secret {
		bool initialized;
		struct in6_addr secret;
	} stable_secret;
	__s32		use_oif_addrs_only;
	__s32		keep_addr_on_down;
	void		*sysctl;
};

struct ipv6_params {
	__s32 disable_ipv6;
	__s32 autoconf;
};
extern struct ipv6_params ipv6_defaults;
#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 *inner_ipv6_hdr(const struct sk_buff *skb)
{
	return (struct ipv6hdr *)skb_inner_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;
	__be16			ra;
	__u16			dst0;
	__u16			srcrt;
	__u16			dst1;
	__u16			lastopt;
	__u16			nhoff;
	__u16			flags;
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
	__u16			dsthao;
#endif
	__u16			frag_max_size;

#define IP6SKB_XFRM_TRANSFORMED	1
#define IP6SKB_FORWARDED	2
#define IP6SKB_REROUTED		4
#define IP6SKB_ROUTERALERT	8
#define IP6SKB_FRAGMENTED      16
#define IP6SKB_HOPBYHOP        32
};

#define IP6CB(skb)	((struct inet6_skb_parm*)((skb)->cb))
#define IP6CBMTU(skb)	((struct ip6_mtuinfo *)((skb)->cb))

static inline int inet6_iif(const struct sk_buff *skb)
{
	return IP6CB(skb)->iif;
}

struct tcp6_request_sock {
	struct tcp_request_sock	  tcp6rsk_tcp;
};

struct ipv6_mc_socklist;
struct ipv6_ac_socklist;
struct ipv6_fl_socklist;

struct inet6_cork {
	struct ipv6_txoptions *opt;
	u8 hop_limit;
	u8 tclass;
};

/**
 * 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_pktinfo	sticky_pktinfo;
	const struct in6_addr		*daddr_cache;
#ifdef CONFIG_IPV6_SUBTREES
	const 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			ucast_oif;
	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,
				rxpmtu:1,
				rxorigdstaddr:1;
				/* 2 bits hole */
		} bits;
		__u16		all;
	} rxopt;

	/* sockopt flags */
	__u16			recverr:1,
	                        sndflow:1,
				repflow:1,
				pmtudisc:3,
				padding:1,	/* 1 bit hole */
				srcprefs:3,	/* 001: prefer temporary address
						 * 010: prefer public address
						 * 100: prefer care-of address
						 */
				dontfrag:1,
				autoflowlabel:1;
	__u8			min_hopcount;
	__u8			tclass;
	__be32			rcv_flowinfo;

	__u32			dst_cookie;
	__u32			rx_dst_cookie;

	struct ipv6_mc_socklist	__rcu *ipv6_mc_list;
	struct ipv6_ac_socklist	*ipv6_ac_list;
	struct ipv6_fl_socklist __rcu *ipv6_fl_list;

	struct ipv6_txoptions __rcu	*opt;
	struct sk_buff		*pktoptions;
	struct sk_buff		*rxpmtu;
	struct inet6_cork	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;
	__u32			ip6mr_table;
	/* 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);

struct tcp6_timewait_sock {
	struct tcp_timewait_sock   tcp6tw_tcp;
};

#if IS_ENABLED(CONFIG_IPV6)
static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk)
{
	return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL;
}

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)	(sk->sk_ipv6only)
#define ipv6_only_sock(sk)	(__ipv6_only_sock(sk))
#define ipv6_sk_rxinfo(sk)	((sk)->sk_family == PF_INET6 && \
				 inet6_sk(sk)->rxopt.bits.rxinfo)

static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
{
	if (sk->sk_family == AF_INET6)
		return &sk->sk_v6_rcv_saddr;
	return NULL;
}

static inline int inet_v6_ipv6only(const struct sock *sk)
{
	/* ipv6only field is at same position for timewait and other sockets */
	return ipv6_only_sock(sk);
}
#else
#define __ipv6_only_sock(sk)	0
#define ipv6_only_sock(sk)	0
#define ipv6_sk_rxinfo(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 tcp_twsk_ipv6only(__sk)		0
#define inet_v6_ipv6only(__sk)		0
#endif /* IS_ENABLED(CONFIG_IPV6) */
#endif /* _IPV6_H */
Commit	Line	Data
	1	#ifndef _IPV6_H
	2	#define _IPV6_H
	3
	4	#include <uapi/linux/ipv6.h>
	5
	6	#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
	7	#define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
	8	/*
	9	* This structure contains configuration options per IPv6 link.
	10	*/
	11	struct ipv6_devconf {
	12	__s32 forwarding;
	13	__s32 hop_limit;
	14	__s32 mtu6;
	15	__s32 accept_ra;
	16	__s32 accept_redirects;
	17	__s32 autoconf;
	18	__s32 dad_transmits;
	19	__s32 rtr_solicits;
	20	__s32 rtr_solicit_interval;
	21	__s32 rtr_solicit_delay;
	22	__s32 force_mld_version;
	23	__s32 mldv1_unsolicited_report_interval;
	24	__s32 mldv2_unsolicited_report_interval;
	25	__s32 use_tempaddr;
	26	__s32 temp_valid_lft;
	27	__s32 temp_prefered_lft;
	28	__s32 regen_max_retry;
	29	__s32 max_desync_factor;
	30	__s32 max_addresses;
	31	__s32 accept_ra_defrtr;
	32	__s32 accept_ra_min_hop_limit;
	33	__s32 accept_ra_pinfo;
	34	__s32 ignore_routes_with_linkdown;
	35	#ifdef CONFIG_IPV6_ROUTER_PREF
	36	__s32 accept_ra_rtr_pref;
	37	__s32 rtr_probe_interval;
	38	#ifdef CONFIG_IPV6_ROUTE_INFO
	39	__s32 accept_ra_rt_info_max_plen;
	40	#endif
	41	#endif
	42	__s32 proxy_ndp;
	43	__s32 accept_source_route;
	44	__s32 accept_ra_from_local;
	45	#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	46	__s32 optimistic_dad;
	47	__s32 use_optimistic;
	48	#endif
	49	#ifdef CONFIG_IPV6_MROUTE
	50	__s32 mc_forwarding;
	51	#endif
	52	__s32 disable_ipv6;
	53	__s32 drop_unicast_in_l2_multicast;
	54	__s32 accept_dad;
	55	__s32 force_tllao;
	56	__s32 ndisc_notify;
	57	__s32 suppress_frag_ndisc;
	58	__s32 accept_ra_mtu;
	59	__s32 drop_unsolicited_na;
	60	struct ipv6_stable_secret {
	61	bool initialized;
	62	struct in6_addr secret;
	63	} stable_secret;
	64	__s32 use_oif_addrs_only;
	65	__s32 keep_addr_on_down;
	66	void *sysctl;
	67	};
	68
	69	struct ipv6_params {
	70	__s32 disable_ipv6;
	71	__s32 autoconf;
	72	};
	73	extern struct ipv6_params ipv6_defaults;
	74	#include <linux/icmpv6.h>
	75	#include <linux/tcp.h>
	76	#include <linux/udp.h>
	77
	78	#include <net/inet_sock.h>
	79
	80	static inline struct ipv6hdr ipv6_hdr(const struct sk_buff skb)
	81	{
	82	return (struct ipv6hdr *)skb_network_header(skb);
	83	}
	84
	85	static inline struct ipv6hdr inner_ipv6_hdr(const struct sk_buff skb)
	86	{
	87	return (struct ipv6hdr *)skb_inner_network_header(skb);
	88	}
	89
	90	static inline struct ipv6hdr ipipv6_hdr(const struct sk_buff skb)
	91	{
	92	return (struct ipv6hdr *)skb_transport_header(skb);
	93	}
	94
	95	/*
	96	This structure contains results of exthdrs parsing
	97	as offsets from skb->nh.
	98	*/
	99
	100	struct inet6_skb_parm {
	101	int iif;
	102	__be16 ra;
	103	__u16 dst0;
	104	__u16 srcrt;
	105	__u16 dst1;
	106	__u16 lastopt;
	107	__u16 nhoff;
	108	__u16 flags;
	109	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
	110	__u16 dsthao;
	111	#endif
	112	__u16 frag_max_size;
	113
	114	#define IP6SKB_XFRM_TRANSFORMED 1
	115	#define IP6SKB_FORWARDED 2
	116	#define IP6SKB_REROUTED 4
	117	#define IP6SKB_ROUTERALERT 8
	118	#define IP6SKB_FRAGMENTED 16
	119	#define IP6SKB_HOPBYHOP 32
	120	};
	121
	122	#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
	123	#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
	124
	125	static inline int inet6_iif(const struct sk_buff *skb)
	126	{
	127	return IP6CB(skb)->iif;
	128	}
	129
	130	struct tcp6_request_sock {
	131	struct tcp_request_sock tcp6rsk_tcp;
	132	};
	133
	134	struct ipv6_mc_socklist;
	135	struct ipv6_ac_socklist;
	136	struct ipv6_fl_socklist;
	137
	138	struct inet6_cork {
	139	struct ipv6_txoptions *opt;
	140	u8 hop_limit;
	141	u8 tclass;
	142	};
	143
	144	/**
	145	* struct ipv6_pinfo - ipv6 private area
	146	*
	147	* In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
	148	* this _must_ be the last member, so that inet6_sk_generic
	149	* is able to calculate its offset from the base struct sock
	150	* by using the struct proto->slab_obj_size member. -acme
	151	*/
	152	struct ipv6_pinfo {
	153	struct in6_addr saddr;
	154	struct in6_pktinfo sticky_pktinfo;
	155	const struct in6_addr *daddr_cache;
	156	#ifdef CONFIG_IPV6_SUBTREES
	157	const struct in6_addr *saddr_cache;
	158	#endif
	159
	160	__be32 flow_label;
	161	__u32 frag_size;
	162
	163	/*
	164	* Packed in 16bits.
	165	* Omit one shift by by putting the signed field at MSB.
	166	*/
	167	#if defined(__BIG_ENDIAN_BITFIELD)
	168	__s16 hop_limit:9;
	169	__u16 __unused_1:7;
	170	#else
	171	__u16 __unused_1:7;
	172	__s16 hop_limit:9;
	173	#endif
	174
	175	#if defined(__BIG_ENDIAN_BITFIELD)
	176	/* Packed in 16bits. */
	177	__s16 mcast_hops:9;
	178	__u16 __unused_2:6,
	179	mc_loop:1;
	180	#else
	181	__u16 mc_loop:1,
	182	__unused_2:6;
	183	__s16 mcast_hops:9;
	184	#endif
	185	int ucast_oif;
	186	int mcast_oif;
	187
	188	/* pktoption flags */
	189	union {
	190	struct {
	191	__u16 srcrt:1,
	192	osrcrt:1,
	193	rxinfo:1,
	194	rxoinfo:1,
	195	rxhlim:1,
	196	rxohlim:1,
	197	hopopts:1,
	198	ohopopts:1,
	199	dstopts:1,
	200	odstopts:1,
	201	rxflow:1,
	202	rxtclass:1,
	203	rxpmtu:1,
	204	rxorigdstaddr:1;
	205	/* 2 bits hole */
	206	} bits;
	207	__u16 all;
	208	} rxopt;
	209
	210	/* sockopt flags */
	211	__u16 recverr:1,
	212	sndflow:1,
	213	repflow:1,
	214	pmtudisc:3,
	215	padding:1, /* 1 bit hole */
	216	srcprefs:3, /* 001: prefer temporary address
	217	* 010: prefer public address
	218	* 100: prefer care-of address
	219	*/
	220	dontfrag:1,
	221	autoflowlabel:1;
	222	__u8 min_hopcount;
	223	__u8 tclass;
	224	__be32 rcv_flowinfo;
	225
	226	__u32 dst_cookie;
	227	__u32 rx_dst_cookie;
	228
	229	struct ipv6_mc_socklist __rcu *ipv6_mc_list;
	230	struct ipv6_ac_socklist *ipv6_ac_list;
	231	struct ipv6_fl_socklist __rcu *ipv6_fl_list;
	232
	233	struct ipv6_txoptions __rcu *opt;
	234	struct sk_buff *pktoptions;
	235	struct sk_buff *rxpmtu;
	236	struct inet6_cork cork;
	237	};
	238
	239	/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
	240	struct raw6_sock {
	241	/* inet_sock has to be the first member of raw6_sock */
	242	struct inet_sock inet;
	243	__u32 checksum; /* perform checksum */
	244	__u32 offset; /* checksum offset */
	245	struct icmp6_filter filter;
	246	__u32 ip6mr_table;
	247	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
	248	struct ipv6_pinfo inet6;
	249	};
	250
	251	struct udp6_sock {
	252	struct udp_sock udp;
	253	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
	254	struct ipv6_pinfo inet6;
	255	};
	256
	257	struct tcp6_sock {
	258	struct tcp_sock tcp;
	259	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
	260	struct ipv6_pinfo inet6;
	261	};
	262
	263	extern int inet6_sk_rebuild_header(struct sock *sk);
	264
	265	struct tcp6_timewait_sock {
	266	struct tcp_timewait_sock tcp6tw_tcp;
	267	};
	268
	269	#if IS_ENABLED(CONFIG_IPV6)
	270	static inline struct ipv6_pinfo inet6_sk(const struct sock __sk)
	271	{
	272	return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL;
	273	}
	274
	275	static inline struct raw6_sock raw6_sk(const struct sock sk)
	276	{
	277	return (struct raw6_sock *)sk;
	278	}
	279
	280	static inline void inet_sk_copy_descendant(struct sock *sk_to,
	281	const struct sock *sk_from)
	282	{
	283	int ancestor_size = sizeof(struct inet_sock);
	284
	285	if (sk_from->sk_family == PF_INET6)
	286	ancestor_size += sizeof(struct ipv6_pinfo);
	287
	288	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
	289	}
	290
	291	#define __ipv6_only_sock(sk) (sk->sk_ipv6only)
	292	#define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
	293	#define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
	294	inet6_sk(sk)->rxopt.bits.rxinfo)
	295
	296	static inline const struct in6_addr inet6_rcv_saddr(const struct sock sk)
	297	{
	298	if (sk->sk_family == AF_INET6)
	299	return &sk->sk_v6_rcv_saddr;
	300	return NULL;
	301	}
	302
	303	static inline int inet_v6_ipv6only(const struct sock *sk)
	304	{
	305	/* ipv6only field is at same position for timewait and other sockets */
	306	return ipv6_only_sock(sk);
	307	}
	308	#else
	309	#define __ipv6_only_sock(sk) 0
	310	#define ipv6_only_sock(sk) 0
	311	#define ipv6_sk_rxinfo(sk) 0
	312
	313	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	314	{
	315	return NULL;
	316	}
	317
	318	static inline struct inet6_request_sock *
	319	inet6_rsk(const struct request_sock *rsk)
	320	{
	321	return NULL;
	322	}
	323
	324	static inline struct raw6_sock raw6_sk(const struct sock sk)
	325	{
	326	return NULL;
	327	}
	328
	329	#define inet6_rcv_saddr(__sk) NULL
	330	#define tcp_twsk_ipv6only(__sk) 0
	331	#define inet_v6_ipv6only(__sk) 0
	332	#endif /* IS_ENABLED(CONFIG_IPV6) */
	333	#endif /* _IPV6_H */