ipv6.h 7.5 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3
#ifndef _IPV6_H
#define _IPV6_H

4
#include <uapi/linux/ipv6.h>
L
Linus Torvalds 已提交
5 6

#define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)
7
#define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
L
Linus Torvalds 已提交
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
/*
 * 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;
23 24
	__s32		mldv1_unsolicited_report_interval;
	__s32		mldv2_unsolicited_report_interval;
L
Linus Torvalds 已提交
25 26 27 28 29 30
	__s32		use_tempaddr;
	__s32		temp_valid_lft;
	__s32		temp_prefered_lft;
	__s32		regen_max_retry;
	__s32		max_desync_factor;
	__s32		max_addresses;
31
	__s32		accept_ra_defrtr;
32
	__s32		accept_ra_pinfo;
33 34
#ifdef CONFIG_IPV6_ROUTER_PREF
	__s32		accept_ra_rtr_pref;
35
	__s32		rtr_probe_interval;
36 37 38
#ifdef CONFIG_IPV6_ROUTE_INFO
	__s32		accept_ra_rt_info_max_plen;
#endif
39
#endif
40
	__s32		proxy_ndp;
41
	__s32		accept_source_route;
42 43
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	__s32		optimistic_dad;
44 45 46
#endif
#ifdef CONFIG_IPV6_MROUTE
	__s32		mc_forwarding;
47
#endif
48
	__s32		disable_ipv6;
49
	__s32		accept_dad;
50
	__s32		force_tllao;
51
	__s32           ndisc_notify;
52
	__s32		suppress_frag_ndisc;
L
Linus Torvalds 已提交
53 54
	void		*sysctl;
};
55 56 57 58 59 60

struct ipv6_params {
	__s32 disable_ipv6;
	__s32 autoconf;
};
extern struct ipv6_params ipv6_defaults;
L
Linus Torvalds 已提交
61 62 63 64
#include <linux/icmpv6.h>
#include <linux/tcp.h>
#include <linux/udp.h>

65 66
#include <net/inet_sock.h>

67 68 69 70 71
static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
{
	return (struct ipv6hdr *)skb_network_header(skb);
}

72 73 74 75 76
static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb)
{
	return (struct ipv6hdr *)skb_inner_network_header(skb);
}

77 78
static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
{
79
	return (struct ipv6hdr *)skb_transport_header(skb);
80 81
}

L
Linus Torvalds 已提交
82 83 84 85 86 87 88
/* 
   This structure contains results of exthdrs parsing
   as offsets from skb->nh.
 */

struct inet6_skb_parm {
	int			iif;
89
	__be16			ra;
L
Linus Torvalds 已提交
90 91 92 93
	__u16			hop;
	__u16			dst0;
	__u16			srcrt;
	__u16			dst1;
94
	__u16			lastopt;
95
	__u16			nhoff;
96
	__u16			flags;
97
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
98 99
	__u16			dsthao;
#endif
100
	__u16			frag_max_size;
101 102

#define IP6SKB_XFRM_TRANSFORMED	1
103
#define IP6SKB_FORWARDED	2
104
#define IP6SKB_REROUTED		4
105
#define IP6SKB_ROUTERALERT	8
106
#define IP6SKB_FRAGMENTED      16
L
Linus Torvalds 已提交
107 108 109
};

#define IP6CB(skb)	((struct inet6_skb_parm*)((skb)->cb))
110
#define IP6CBMTU(skb)	((struct ip6_mtuinfo *)((skb)->cb))
L
Linus Torvalds 已提交
111

112 113 114 115 116
static inline int inet6_iif(const struct sk_buff *skb)
{
	return IP6CB(skb)->iif;
}

117 118 119
struct tcp6_request_sock {
	struct tcp_request_sock	  tcp6rsk_tcp;
};
120

121 122 123 124
struct ipv6_mc_socklist;
struct ipv6_ac_socklist;
struct ipv6_fl_socklist;

L
Linus Torvalds 已提交
125 126 127 128 129 130 131 132 133 134
/**
 * 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;
135
	struct in6_pktinfo	sticky_pktinfo;
E
Eric Dumazet 已提交
136
	const struct in6_addr		*daddr_cache;
137
#ifdef CONFIG_IPV6_SUBTREES
E
Eric Dumazet 已提交
138
	const struct in6_addr		*saddr_cache;
139
#endif
L
Linus Torvalds 已提交
140

A
Al Viro 已提交
141
	__be32			flow_label;
L
Linus Torvalds 已提交
142
	__u32			frag_size;
143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165

	/*
	 * 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
166
	int			ucast_oif;
L
Linus Torvalds 已提交
167 168 169 170 171
	int			mcast_oif;

	/* pktoption flags */
	union {
		struct {
172 173
			__u16	srcrt:1,
				osrcrt:1,
L
Linus Torvalds 已提交
174
			        rxinfo:1,
175
			        rxoinfo:1,
L
Linus Torvalds 已提交
176
				rxhlim:1,
177
				rxohlim:1,
L
Linus Torvalds 已提交
178
				hopopts:1,
179
				ohopopts:1,
L
Linus Torvalds 已提交
180
				dstopts:1,
181
				odstopts:1,
182
                                rxflow:1,
183
				rxtclass:1,
184 185 186
				rxpmtu:1,
				rxorigdstaddr:1;
				/* 2 bits hole */
L
Linus Torvalds 已提交
187
		} bits;
188
		__u16		all;
L
Linus Torvalds 已提交
189 190 191
	} rxopt;

	/* sockopt flags */
192
	__u16			recverr:1,
L
Linus Torvalds 已提交
193 194
	                        sndflow:1,
				pmtudisc:2,
195
				ipv6only:1,
196
				srcprefs:3,	/* 001: prefer temporary address
197 198 199
						 * 010: prefer public address
						 * 100: prefer care-of address
						 */
200
				dontfrag:1;
201
	__u8			min_hopcount;
202
	__u8			tclass;
203
	__u8			rcv_tclass;
L
Linus Torvalds 已提交
204 205

	__u32			dst_cookie;
E
Eric Dumazet 已提交
206
	__u32			rx_dst_cookie;
L
Linus Torvalds 已提交
207

E
Eric Dumazet 已提交
208
	struct ipv6_mc_socklist	__rcu *ipv6_mc_list;
L
Linus Torvalds 已提交
209
	struct ipv6_ac_socklist	*ipv6_ac_list;
210
	struct ipv6_fl_socklist __rcu *ipv6_fl_list;
L
Linus Torvalds 已提交
211 212 213

	struct ipv6_txoptions	*opt;
	struct sk_buff		*pktoptions;
214
	struct sk_buff		*rxpmtu;
L
Linus Torvalds 已提交
215 216
	struct {
		struct ipv6_txoptions *opt;
217 218
		u8 hop_limit;
		u8 tclass;
L
Linus Torvalds 已提交
219 220 221 222 223 224 225 226 227 228
	} 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;
229
	__u32			ip6mr_table;
L
Linus Torvalds 已提交
230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245
	/* 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;
};

246 247
extern int inet6_sk_rebuild_header(struct sock *sk);

248 249 250 251
struct tcp6_timewait_sock {
	struct tcp_timewait_sock   tcp6tw_tcp;
};

E
Eric Dumazet 已提交
252
#if IS_ENABLED(CONFIG_IPV6)
L
Linus Torvalds 已提交
253 254 255 256 257
static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
{
	return inet_sk(__sk)->pinet6;
}

258 259 260 261
static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
{
	struct request_sock *req = reqsk_alloc(ops);

262 263
	if (req)
		inet_rsk(req)->pktopts = NULL;
264 265 266 267

	return req;
}

L
Linus Torvalds 已提交
268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285
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))
286

287
static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
288
{
289 290 291
	if (sk->sk_family == AF_INET6)
		return &sk->sk_v6_rcv_saddr;
	return NULL;
292 293
}

294
static inline int inet_v6_ipv6only(const struct sock *sk)
295 296
{
	return likely(sk->sk_state != TCP_TIME_WAIT) ?
297
		ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
298
}
L
Linus Torvalds 已提交
299 300 301 302 303 304 305 306 307
#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;
}

308 309 310 311 312 313
static inline struct inet6_request_sock *
			inet6_rsk(const struct request_sock *rsk)
{
	return NULL;
}

L
Linus Torvalds 已提交
314 315 316 317 318
static inline struct raw6_sock *raw6_sk(const struct sock *sk)
{
	return NULL;
}

319
#define inet6_rcv_saddr(__sk)	NULL
320
#define tcp_twsk_ipv6only(__sk)		0
321
#define inet_v6_ipv6only(__sk)		0
E
Eric Dumazet 已提交
322
#endif /* IS_ENABLED(CONFIG_IPV6) */
L
Linus Torvalds 已提交
323

324
#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif)	\
E
Eric Dumazet 已提交
325
	(((__sk)->sk_portpair == (__ports))			&&	\
326
	 ((__sk)->sk_family == AF_INET6)			&&	\
327 328
	 ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr))		&&	\
	 ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr))	&&	\
329 330 331 332
	 (!(__sk)->sk_bound_dev_if	||				\
	   ((__sk)->sk_bound_dev_if == (__dif))) 		&&	\
	 net_eq(sock_net(__sk), (__net)))

333
#endif /* _IPV6_H */