[net-next-2.6.git] / include / linux / ipv6.h

#ifndef _IPV6_H
#define _IPV6_H

#include <linux/config.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	*/

/*
 *	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			bitmap;		/* strict/loose bit map */
	struct in6_addr		addr[0];

#define rt0_type		rt_hdr.type
};

struct ipv6_auth_hdr {
	__u8  nexthdr;
	__u8  hdrlen;           /* This one is measured in 32 bit units! */
	__u16 reserved;
	__u32 spi;
	__u32 seq_no;           /* Sequence number */
	__u8  auth_data[0];     /* Length variable but >=4. Mind the 64 bit alignment! */
};

struct ipv6_esp_hdr {
	__u32 spi;
	__u32 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;
	__u16 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];

	__u16			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;
	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_MAX
};

#ifdef __KERNEL__
#include <linux/in6.h>          /* struct sockaddr_in6 */
#include <linux/icmpv6.h>
#include <net/if_inet6.h>       /* struct ipv6_mc_socklist */
#include <linux/tcp.h>
#include <linux/udp.h>

/* 
   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;
};

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

/**
 * 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;

	__u32			flow_label;
	__u32			frag_size;
	__s16			hop_limit;
	__s16			mcast_hops;
	int			mcast_oif;

	/* pktoption flags */
	union {
		struct {
			__u8	srcrt:2,
			        rxinfo:1,
				rxhlim:1,
				hopopts:1,
				dstopts:1,
                                rxflow:1;
		} bits;
		__u8		all;
	} rxopt;

	/* sockopt flags */
	__u8			mc_loop:1,
	                        recverr:1,
	                        sndflow:1,
				pmtudisc:2,
				ipv6only:1;

	__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;
	} 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;
};

#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 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))
#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 raw6_sock *raw6_sk(const struct sock *sk)
{
	return NULL;
}

#endif

#endif

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _IPV6_H
	2	#define _IPV6_H
	3
	4	#include <linux/config.h>
	5	#include <linux/in6.h>
	6	#include <asm/byteorder.h>
	7
	8	/* The latest drafts declared increase in minimal mtu up to 1280. */
	9
	10	#define IPV6_MIN_MTU 1280
	11
	12	/*
	13	* Advanced API
	14	* source interface/address selection, source routing, etc...
	15	* under construction
	16	*/
	17
	18
	19	struct in6_pktinfo {
	20	struct in6_addr ipi6_addr;
	21	int ipi6_ifindex;
	22	};
	23
	24
	25	struct in6_ifreq {
	26	struct in6_addr ifr6_addr;
	27	__u32 ifr6_prefixlen;
	28	int ifr6_ifindex;
	29	};
	30
	31	#define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */
	32	#define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 Routing Header */
	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;
71	__u32 bitmap; /* strict/loose bit map */
72	struct in6_addr addr[0];
73
74	#define rt0_type rt_hdr.type
75	};
76
77	struct ipv6_auth_hdr {
78	__u8 nexthdr;
79	__u8 hdrlen; /* This one is measured in 32 bit units! */
80	__u16 reserved;
81	__u32 spi;
82	__u32 seq_no; /* Sequence number */
83	__u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
84	};
85
86	struct ipv6_esp_hdr {
87	__u32 spi;
88	__u32 seq_no; /* Sequence number */
89	__u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
90	};
91
92	struct ipv6_comp_hdr {
93	__u8 nexthdr;
94	__u8 flags;
95	__u16 cpi;
96	};
97
98	/*
99	* IPv6 fixed header
100	*
101	* BEWARE, it is incorrect. The first 4 bits of flow_lbl
102	* are glued to priority now, forming "class".
103	*/
104
105	struct ipv6hdr {
106	#if defined(__LITTLE_ENDIAN_BITFIELD)
107	__u8 priority:4,
108	version:4;
109	#elif defined(__BIG_ENDIAN_BITFIELD)
110	__u8 version:4,
111	priority:4;
112	#else
113	#error "Please fix <asm/byteorder.h>"
114	#endif
115	__u8 flow_lbl[3];
116
117	__u16 payload_len;
118	__u8 nexthdr;
119	__u8 hop_limit;
120
121	struct in6_addr saddr;
122	struct in6_addr daddr;
123	};
124
125	/*
126	* This structure contains configuration options per IPv6 link.
127	*/
128	struct ipv6_devconf {
129	__s32 forwarding;
130	__s32 hop_limit;
131	__s32 mtu6;
132	__s32 accept_ra;
133	__s32 accept_redirects;
134	__s32 autoconf;
135	__s32 dad_transmits;
136	__s32 rtr_solicits;
137	__s32 rtr_solicit_interval;
138	__s32 rtr_solicit_delay;
139	__s32 force_mld_version;
140	#ifdef CONFIG_IPV6_PRIVACY
141	__s32 use_tempaddr;
142	__s32 temp_valid_lft;
143	__s32 temp_prefered_lft;
144	__s32 regen_max_retry;
145	__s32 max_desync_factor;
146	#endif
147	__s32 max_addresses;
148	void *sysctl;
149	};
150
151	/* index values for the variables in ipv6_devconf */
152	enum {
153	DEVCONF_FORWARDING = 0,
154	DEVCONF_HOPLIMIT,
155	DEVCONF_MTU6,
156	DEVCONF_ACCEPT_RA,
157	DEVCONF_ACCEPT_REDIRECTS,
158	DEVCONF_AUTOCONF,
159	DEVCONF_DAD_TRANSMITS,
160	DEVCONF_RTR_SOLICITS,
161	DEVCONF_RTR_SOLICIT_INTERVAL,
162	DEVCONF_RTR_SOLICIT_DELAY,
163	DEVCONF_USE_TEMPADDR,
164	DEVCONF_TEMP_VALID_LFT,
165	DEVCONF_TEMP_PREFERED_LFT,
166	DEVCONF_REGEN_MAX_RETRY,
167	DEVCONF_MAX_DESYNC_FACTOR,
168	DEVCONF_MAX_ADDRESSES,
169	DEVCONF_FORCE_MLD_VERSION,
170	DEVCONF_MAX
171	};
172
173	#ifdef __KERNEL__
174	#include <linux/in6.h> /* struct sockaddr_in6 */
175	#include <linux/icmpv6.h>
176	#include <net/if_inet6.h> /* struct ipv6_mc_socklist */
177	#include <linux/tcp.h>
178	#include <linux/udp.h>
179
180	/*
181	This structure contains results of exthdrs parsing
182	as offsets from skb->nh.
183	*/
184
185	struct inet6_skb_parm {
186	int iif;
187	__u16 ra;
188	__u16 hop;
189	__u16 dst0;
190	__u16 srcrt;
191	__u16 dst1;
192	};
193
194	#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
195
196	/**
197	* struct ipv6_pinfo - ipv6 private area
198	*
199	* In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
200	* this _must_ be the last member, so that inet6_sk_generic
201	* is able to calculate its offset from the base struct sock
202	* by using the struct proto->slab_obj_size member. -acme
203	*/
204	struct ipv6_pinfo {
205	struct in6_addr saddr;
206	struct in6_addr rcv_saddr;
207	struct in6_addr daddr;
208	struct in6_addr *daddr_cache;
209
210	__u32 flow_label;
211	__u32 frag_size;
212	__s16 hop_limit;
213	__s16 mcast_hops;
214	int mcast_oif;
215
216	/* pktoption flags */
217	union {
218	struct {
219	__u8 srcrt:2,
220	rxinfo:1,
221	rxhlim:1,
222	hopopts:1,
223	dstopts:1,
224	rxflow:1;
225	} bits;
226	__u8 all;
227	} rxopt;
228
229	/* sockopt flags */
230	__u8 mc_loop:1,
231	recverr:1,
232	sndflow:1,
233	pmtudisc:2,
234	ipv6only:1;
235
236	__u32 dst_cookie;
237
238	struct ipv6_mc_socklist *ipv6_mc_list;
239	struct ipv6_ac_socklist *ipv6_ac_list;
240	struct ipv6_fl_socklist *ipv6_fl_list;
241
242	struct ipv6_txoptions *opt;
243	struct sk_buff *pktoptions;
244	struct {
245	struct ipv6_txoptions *opt;
246	struct rt6_info *rt;
247	int hop_limit;
248	} cork;
249	};
250
251	/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
252	struct raw6_sock {
253	/* inet_sock has to be the first member of raw6_sock */
254	struct inet_sock inet;
255	__u32 checksum; /* perform checksum */
256	__u32 offset; /* checksum offset */
257	struct icmp6_filter filter;
258	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
259	struct ipv6_pinfo inet6;
260	};
261
262	struct udp6_sock {
263	struct udp_sock udp;
264	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
265	struct ipv6_pinfo inet6;
266	};
267
268	struct tcp6_sock {
269	struct tcp_sock tcp;
270	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
271	struct ipv6_pinfo inet6;
272	};
273
274	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
275	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
276	{
277	return inet_sk(__sk)->pinet6;
278	}
279
280	static inline struct raw6_sock raw6_sk(const struct sock sk)
281	{
282	return (struct raw6_sock *)sk;
283	}
284
285	static inline void inet_sk_copy_descendant(struct sock *sk_to,
286	const struct sock *sk_from)
287	{
288	int ancestor_size = sizeof(struct inet_sock);
289
290	if (sk_from->sk_family == PF_INET6)
291	ancestor_size += sizeof(struct ipv6_pinfo);
292
293	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
294	}
295
296	#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
297	#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
298	#else
299	#define __ipv6_only_sock(sk) 0
300	#define ipv6_only_sock(sk) 0
301
302	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
303	{
304	return NULL;
305	}
306
307	static inline struct raw6_sock raw6_sk(const struct sock sk)
308	{
309	return NULL;
310	}
311
312	#endif
313
314	#endif
315
316	#endif