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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 |