Root/
1 | /* |
2 | * Linux INET6 implementation |
3 | * |
4 | * Authors: |
5 | * Pedro Roque <roque@di.fc.ul.pt> |
6 | * |
7 | * This program is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU General Public License |
9 | * as published by the Free Software Foundation; either version |
10 | * 2 of the License, or (at your option) any later version. |
11 | */ |
12 | |
13 | #ifndef _NET_IPV6_H |
14 | #define _NET_IPV6_H |
15 | |
16 | #include <linux/ipv6.h> |
17 | #include <linux/hardirq.h> |
18 | #include <net/if_inet6.h> |
19 | #include <net/ndisc.h> |
20 | #include <net/flow.h> |
21 | #include <net/snmp.h> |
22 | |
23 | #define SIN6_LEN_RFC2133 24 |
24 | |
25 | #define IPV6_MAXPLEN 65535 |
26 | |
27 | /* |
28 | * NextHeader field of IPv6 header |
29 | */ |
30 | |
31 | #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */ |
32 | #define NEXTHDR_TCP 6 /* TCP segment. */ |
33 | #define NEXTHDR_UDP 17 /* UDP message. */ |
34 | #define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */ |
35 | #define NEXTHDR_ROUTING 43 /* Routing header. */ |
36 | #define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */ |
37 | #define NEXTHDR_ESP 50 /* Encapsulating security payload. */ |
38 | #define NEXTHDR_AUTH 51 /* Authentication header. */ |
39 | #define NEXTHDR_ICMP 58 /* ICMP for IPv6. */ |
40 | #define NEXTHDR_NONE 59 /* No next header */ |
41 | #define NEXTHDR_DEST 60 /* Destination options header. */ |
42 | #define NEXTHDR_MOBILITY 135 /* Mobility header. */ |
43 | |
44 | #define NEXTHDR_MAX 255 |
45 | |
46 | |
47 | |
48 | #define IPV6_DEFAULT_HOPLIMIT 64 |
49 | #define IPV6_DEFAULT_MCASTHOPS 1 |
50 | |
51 | /* |
52 | * Addr type |
53 | * |
54 | * type - unicast | multicast |
55 | * scope - local | site | global |
56 | * v4 - compat |
57 | * v4mapped |
58 | * any |
59 | * loopback |
60 | */ |
61 | |
62 | #define IPV6_ADDR_ANY 0x0000U |
63 | |
64 | #define IPV6_ADDR_UNICAST 0x0001U |
65 | #define IPV6_ADDR_MULTICAST 0x0002U |
66 | |
67 | #define IPV6_ADDR_LOOPBACK 0x0010U |
68 | #define IPV6_ADDR_LINKLOCAL 0x0020U |
69 | #define IPV6_ADDR_SITELOCAL 0x0040U |
70 | |
71 | #define IPV6_ADDR_COMPATv4 0x0080U |
72 | |
73 | #define IPV6_ADDR_SCOPE_MASK 0x00f0U |
74 | |
75 | #define IPV6_ADDR_MAPPED 0x1000U |
76 | |
77 | /* |
78 | * Addr scopes |
79 | */ |
80 | #define IPV6_ADDR_MC_SCOPE(a) \ |
81 | ((a)->s6_addr[1] & 0x0f) /* nonstandard */ |
82 | #define __IPV6_ADDR_SCOPE_INVALID -1 |
83 | #define IPV6_ADDR_SCOPE_NODELOCAL 0x01 |
84 | #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02 |
85 | #define IPV6_ADDR_SCOPE_SITELOCAL 0x05 |
86 | #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08 |
87 | #define IPV6_ADDR_SCOPE_GLOBAL 0x0e |
88 | |
89 | /* |
90 | * Addr flags |
91 | */ |
92 | #define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \ |
93 | ((a)->s6_addr[1] & 0x10) |
94 | #define IPV6_ADDR_MC_FLAG_PREFIX(a) \ |
95 | ((a)->s6_addr[1] & 0x20) |
96 | #define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \ |
97 | ((a)->s6_addr[1] & 0x40) |
98 | |
99 | /* |
100 | * fragmentation header |
101 | */ |
102 | |
103 | struct frag_hdr { |
104 | __u8 nexthdr; |
105 | __u8 reserved; |
106 | __be16 frag_off; |
107 | __be32 identification; |
108 | }; |
109 | |
110 | #define IP6_MF 0x0001 |
111 | |
112 | #include <net/sock.h> |
113 | |
114 | /* sysctls */ |
115 | extern int sysctl_mld_max_msf; |
116 | extern struct ctl_path net_ipv6_ctl_path[]; |
117 | |
118 | #define _DEVINC(net, statname, modifier, idev, field) \ |
119 | ({ \ |
120 | struct inet6_dev *_idev = (idev); \ |
121 | if (likely(_idev != NULL)) \ |
122 | SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ |
123 | SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ |
124 | }) |
125 | |
126 | /* per device counters are atomic_long_t */ |
127 | #define _DEVINCATOMIC(net, statname, modifier, idev, field) \ |
128 | ({ \ |
129 | struct inet6_dev *_idev = (idev); \ |
130 | if (likely(_idev != NULL)) \ |
131 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ |
132 | SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ |
133 | }) |
134 | |
135 | #define _DEVADD(net, statname, modifier, idev, field, val) \ |
136 | ({ \ |
137 | struct inet6_dev *_idev = (idev); \ |
138 | if (likely(_idev != NULL)) \ |
139 | SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ |
140 | SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\ |
141 | }) |
142 | |
143 | #define _DEVUPD(net, statname, modifier, idev, field, val) \ |
144 | ({ \ |
145 | struct inet6_dev *_idev = (idev); \ |
146 | if (likely(_idev != NULL)) \ |
147 | SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \ |
148 | SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\ |
149 | }) |
150 | |
151 | /* MIBs */ |
152 | |
153 | #define IP6_INC_STATS(net, idev,field) \ |
154 | _DEVINC(net, ipv6, 64, idev, field) |
155 | #define IP6_INC_STATS_BH(net, idev,field) \ |
156 | _DEVINC(net, ipv6, 64_BH, idev, field) |
157 | #define IP6_ADD_STATS(net, idev,field,val) \ |
158 | _DEVADD(net, ipv6, 64, idev, field, val) |
159 | #define IP6_ADD_STATS_BH(net, idev,field,val) \ |
160 | _DEVADD(net, ipv6, 64_BH, idev, field, val) |
161 | #define IP6_UPD_PO_STATS(net, idev,field,val) \ |
162 | _DEVUPD(net, ipv6, 64, idev, field, val) |
163 | #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \ |
164 | _DEVUPD(net, ipv6, 64_BH, idev, field, val) |
165 | #define ICMP6_INC_STATS(net, idev, field) \ |
166 | _DEVINCATOMIC(net, icmpv6, , idev, field) |
167 | #define ICMP6_INC_STATS_BH(net, idev, field) \ |
168 | _DEVINCATOMIC(net, icmpv6, _BH, idev, field) |
169 | |
170 | #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ |
171 | _DEVINCATOMIC(net, icmpv6msg, , idev, field +256) |
172 | #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \ |
173 | _DEVINCATOMIC(net, icmpv6msg, _BH, idev, field +256) |
174 | #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \ |
175 | _DEVINCATOMIC(net, icmpv6msg, _BH, idev, field) |
176 | |
177 | struct ip6_ra_chain { |
178 | struct ip6_ra_chain *next; |
179 | struct sock *sk; |
180 | int sel; |
181 | void (*destructor)(struct sock *); |
182 | }; |
183 | |
184 | extern struct ip6_ra_chain *ip6_ra_chain; |
185 | extern rwlock_t ip6_ra_lock; |
186 | |
187 | /* |
188 | This structure is prepared by protocol, when parsing |
189 | ancillary data and passed to IPv6. |
190 | */ |
191 | |
192 | struct ipv6_txoptions { |
193 | /* Length of this structure */ |
194 | int tot_len; |
195 | |
196 | /* length of extension headers */ |
197 | |
198 | __u16 opt_flen; /* after fragment hdr */ |
199 | __u16 opt_nflen; /* before fragment hdr */ |
200 | |
201 | struct ipv6_opt_hdr *hopopt; |
202 | struct ipv6_opt_hdr *dst0opt; |
203 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ |
204 | struct ipv6_opt_hdr *dst1opt; |
205 | |
206 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ |
207 | }; |
208 | |
209 | struct ip6_flowlabel { |
210 | struct ip6_flowlabel *next; |
211 | __be32 label; |
212 | atomic_t users; |
213 | struct in6_addr dst; |
214 | struct ipv6_txoptions *opt; |
215 | unsigned long linger; |
216 | u8 share; |
217 | u32 owner; |
218 | unsigned long lastuse; |
219 | unsigned long expires; |
220 | struct net *fl_net; |
221 | }; |
222 | |
223 | #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) |
224 | #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) |
225 | |
226 | struct ipv6_fl_socklist { |
227 | struct ipv6_fl_socklist *next; |
228 | struct ip6_flowlabel *fl; |
229 | }; |
230 | |
231 | extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
232 | extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, |
233 | struct ip6_flowlabel * fl, |
234 | struct ipv6_txoptions * fopt); |
235 | extern void fl6_free_socklist(struct sock *sk); |
236 | extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); |
237 | extern int ip6_flowlabel_init(void); |
238 | extern void ip6_flowlabel_cleanup(void); |
239 | |
240 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) |
241 | { |
242 | if (fl) |
243 | atomic_dec(&fl->users); |
244 | } |
245 | |
246 | extern int ip6_ra_control(struct sock *sk, int sel); |
247 | |
248 | extern int ipv6_parse_hopopts(struct sk_buff *skb); |
249 | |
250 | extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt); |
251 | extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, |
252 | int newtype, |
253 | struct ipv6_opt_hdr __user *newopt, |
254 | int newoptlen); |
255 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
256 | struct ipv6_txoptions *opt); |
257 | |
258 | extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb); |
259 | |
260 | int ip6_frag_nqueues(struct net *net); |
261 | int ip6_frag_mem(struct net *net); |
262 | |
263 | #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */ |
264 | #define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */ |
265 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ |
266 | |
267 | extern int __ipv6_addr_type(const struct in6_addr *addr); |
268 | static inline int ipv6_addr_type(const struct in6_addr *addr) |
269 | { |
270 | return __ipv6_addr_type(addr) & 0xffff; |
271 | } |
272 | |
273 | static inline int ipv6_addr_scope(const struct in6_addr *addr) |
274 | { |
275 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
276 | } |
277 | |
278 | static inline int __ipv6_addr_src_scope(int type) |
279 | { |
280 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
281 | } |
282 | |
283 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) |
284 | { |
285 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); |
286 | } |
287 | |
288 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
289 | { |
290 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
291 | } |
292 | |
293 | static inline int |
294 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, |
295 | const struct in6_addr *a2) |
296 | { |
297 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
298 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | |
299 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | |
300 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); |
301 | } |
302 | |
303 | static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2) |
304 | { |
305 | memcpy(a1, a2, sizeof(struct in6_addr)); |
306 | } |
307 | |
308 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
309 | const struct in6_addr *addr, |
310 | int plen) |
311 | { |
312 | /* caller must guarantee 0 <= plen <= 128 */ |
313 | int o = plen >> 3, |
314 | b = plen & 0x7; |
315 | |
316 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
317 | memcpy(pfx->s6_addr, addr, o); |
318 | if (b != 0) |
319 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
320 | } |
321 | |
322 | static inline void ipv6_addr_set(struct in6_addr *addr, |
323 | __be32 w1, __be32 w2, |
324 | __be32 w3, __be32 w4) |
325 | { |
326 | addr->s6_addr32[0] = w1; |
327 | addr->s6_addr32[1] = w2; |
328 | addr->s6_addr32[2] = w3; |
329 | addr->s6_addr32[3] = w4; |
330 | } |
331 | |
332 | static inline int ipv6_addr_equal(const struct in6_addr *a1, |
333 | const struct in6_addr *a2) |
334 | { |
335 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
336 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | |
337 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | |
338 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; |
339 | } |
340 | |
341 | static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2, |
342 | unsigned int prefixlen) |
343 | { |
344 | unsigned pdw, pbi; |
345 | |
346 | /* check complete u32 in prefix */ |
347 | pdw = prefixlen >> 5; |
348 | if (pdw && memcmp(a1, a2, pdw << 2)) |
349 | return 0; |
350 | |
351 | /* check incomplete u32 in prefix */ |
352 | pbi = prefixlen & 0x1f; |
353 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) |
354 | return 0; |
355 | |
356 | return 1; |
357 | } |
358 | |
359 | static inline int ipv6_prefix_equal(const struct in6_addr *a1, |
360 | const struct in6_addr *a2, |
361 | unsigned int prefixlen) |
362 | { |
363 | return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32, |
364 | prefixlen); |
365 | } |
366 | |
367 | struct inet_frag_queue; |
368 | |
369 | enum ip6_defrag_users { |
370 | IP6_DEFRAG_LOCAL_DELIVER, |
371 | IP6_DEFRAG_CONNTRACK_IN, |
372 | __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
373 | IP6_DEFRAG_CONNTRACK_OUT, |
374 | __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
375 | IP6_DEFRAG_CONNTRACK_BRIDGE_IN, |
376 | __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
377 | }; |
378 | |
379 | struct ip6_create_arg { |
380 | __be32 id; |
381 | u32 user; |
382 | const struct in6_addr *src; |
383 | const struct in6_addr *dst; |
384 | }; |
385 | |
386 | void ip6_frag_init(struct inet_frag_queue *q, void *a); |
387 | int ip6_frag_match(struct inet_frag_queue *q, void *a); |
388 | |
389 | static inline int ipv6_addr_any(const struct in6_addr *a) |
390 | { |
391 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
392 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; |
393 | } |
394 | |
395 | static inline int ipv6_addr_loopback(const struct in6_addr *a) |
396 | { |
397 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
398 | a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0; |
399 | } |
400 | |
401 | static inline int ipv6_addr_v4mapped(const struct in6_addr *a) |
402 | { |
403 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
404 | (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0; |
405 | } |
406 | |
407 | /* |
408 | * Check for a RFC 4843 ORCHID address |
409 | * (Overlay Routable Cryptographic Hash Identifiers) |
410 | */ |
411 | static inline int ipv6_addr_orchid(const struct in6_addr *a) |
412 | { |
413 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
414 | } |
415 | |
416 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
417 | struct in6_addr *v4mapped) |
418 | { |
419 | ipv6_addr_set(v4mapped, |
420 | 0, 0, |
421 | htonl(0x0000FFFF), |
422 | addr); |
423 | } |
424 | |
425 | /* |
426 | * find the first different bit between two addresses |
427 | * length of address must be a multiple of 32bits |
428 | */ |
429 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) |
430 | { |
431 | const __be32 *a1 = token1, *a2 = token2; |
432 | int i; |
433 | |
434 | addrlen >>= 2; |
435 | |
436 | for (i = 0; i < addrlen; i++) { |
437 | __be32 xb = a1[i] ^ a2[i]; |
438 | if (xb) |
439 | return i * 32 + 31 - __fls(ntohl(xb)); |
440 | } |
441 | |
442 | /* |
443 | * we should *never* get to this point since that |
444 | * would mean the addrs are equal |
445 | * |
446 | * However, we do get to it 8) And exacly, when |
447 | * addresses are equal 8) |
448 | * |
449 | * ip route add 1111::/128 via ... |
450 | * ip route add 1111::/64 via ... |
451 | * and we are here. |
452 | * |
453 | * Ideally, this function should stop comparison |
454 | * at prefix length. It does not, but it is still OK, |
455 | * if returned value is greater than prefix length. |
456 | * --ANK (980803) |
457 | */ |
458 | return addrlen << 5; |
459 | } |
460 | |
461 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
462 | { |
463 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); |
464 | } |
465 | |
466 | static __inline__ void ipv6_select_ident(struct frag_hdr *fhdr) |
467 | { |
468 | static u32 ipv6_fragmentation_id = 1; |
469 | static DEFINE_SPINLOCK(ip6_id_lock); |
470 | |
471 | spin_lock_bh(&ip6_id_lock); |
472 | fhdr->identification = htonl(ipv6_fragmentation_id); |
473 | if (++ipv6_fragmentation_id == 0) |
474 | ipv6_fragmentation_id = 1; |
475 | spin_unlock_bh(&ip6_id_lock); |
476 | } |
477 | |
478 | /* |
479 | * Prototypes exported by ipv6 |
480 | */ |
481 | |
482 | /* |
483 | * rcv function (called from netdevice level) |
484 | */ |
485 | |
486 | extern int ipv6_rcv(struct sk_buff *skb, |
487 | struct net_device *dev, |
488 | struct packet_type *pt, |
489 | struct net_device *orig_dev); |
490 | |
491 | extern int ip6_rcv_finish(struct sk_buff *skb); |
492 | |
493 | /* |
494 | * upper-layer output functions |
495 | */ |
496 | extern int ip6_xmit(struct sock *sk, |
497 | struct sk_buff *skb, |
498 | struct flowi6 *fl6, |
499 | struct ipv6_txoptions *opt); |
500 | |
501 | extern int ip6_nd_hdr(struct sock *sk, |
502 | struct sk_buff *skb, |
503 | struct net_device *dev, |
504 | const struct in6_addr *saddr, |
505 | const struct in6_addr *daddr, |
506 | int proto, int len); |
507 | |
508 | extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); |
509 | |
510 | extern int ip6_append_data(struct sock *sk, |
511 | int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), |
512 | void *from, |
513 | int length, |
514 | int transhdrlen, |
515 | int hlimit, |
516 | int tclass, |
517 | struct ipv6_txoptions *opt, |
518 | struct flowi6 *fl6, |
519 | struct rt6_info *rt, |
520 | unsigned int flags, |
521 | int dontfrag); |
522 | |
523 | extern int ip6_push_pending_frames(struct sock *sk); |
524 | |
525 | extern void ip6_flush_pending_frames(struct sock *sk); |
526 | |
527 | extern int ip6_dst_lookup(struct sock *sk, |
528 | struct dst_entry **dst, |
529 | struct flowi6 *fl6); |
530 | extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk, |
531 | struct flowi6 *fl6, |
532 | const struct in6_addr *final_dst, |
533 | bool can_sleep); |
534 | extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk, |
535 | struct flowi6 *fl6, |
536 | const struct in6_addr *final_dst, |
537 | bool can_sleep); |
538 | extern struct dst_entry * ip6_blackhole_route(struct net *net, |
539 | struct dst_entry *orig_dst); |
540 | |
541 | /* |
542 | * skb processing functions |
543 | */ |
544 | |
545 | extern int ip6_output(struct sk_buff *skb); |
546 | extern int ip6_forward(struct sk_buff *skb); |
547 | extern int ip6_input(struct sk_buff *skb); |
548 | extern int ip6_mc_input(struct sk_buff *skb); |
549 | |
550 | extern int __ip6_local_out(struct sk_buff *skb); |
551 | extern int ip6_local_out(struct sk_buff *skb); |
552 | |
553 | /* |
554 | * Extension header (options) processing |
555 | */ |
556 | |
557 | extern void ipv6_push_nfrag_opts(struct sk_buff *skb, |
558 | struct ipv6_txoptions *opt, |
559 | u8 *proto, |
560 | struct in6_addr **daddr_p); |
561 | extern void ipv6_push_frag_opts(struct sk_buff *skb, |
562 | struct ipv6_txoptions *opt, |
563 | u8 *proto); |
564 | |
565 | extern int ipv6_skip_exthdr(const struct sk_buff *, int start, |
566 | u8 *nexthdrp); |
567 | |
568 | extern int ipv6_ext_hdr(u8 nexthdr); |
569 | |
570 | extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type); |
571 | |
572 | extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6, |
573 | const struct ipv6_txoptions *opt, |
574 | struct in6_addr *orig); |
575 | |
576 | /* |
577 | * socket options (ipv6_sockglue.c) |
578 | */ |
579 | |
580 | extern int ipv6_setsockopt(struct sock *sk, int level, |
581 | int optname, |
582 | char __user *optval, |
583 | unsigned int optlen); |
584 | extern int ipv6_getsockopt(struct sock *sk, int level, |
585 | int optname, |
586 | char __user *optval, |
587 | int __user *optlen); |
588 | extern int compat_ipv6_setsockopt(struct sock *sk, |
589 | int level, |
590 | int optname, |
591 | char __user *optval, |
592 | unsigned int optlen); |
593 | extern int compat_ipv6_getsockopt(struct sock *sk, |
594 | int level, |
595 | int optname, |
596 | char __user *optval, |
597 | int __user *optlen); |
598 | |
599 | extern int ip6_datagram_connect(struct sock *sk, |
600 | struct sockaddr *addr, int addr_len); |
601 | |
602 | extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len); |
603 | extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len); |
604 | extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
605 | u32 info, u8 *payload); |
606 | extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); |
607 | extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); |
608 | |
609 | extern int inet6_release(struct socket *sock); |
610 | extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, |
611 | int addr_len); |
612 | extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
613 | int *uaddr_len, int peer); |
614 | extern int inet6_ioctl(struct socket *sock, unsigned int cmd, |
615 | unsigned long arg); |
616 | |
617 | extern int inet6_hash_connect(struct inet_timewait_death_row *death_row, |
618 | struct sock *sk); |
619 | |
620 | /* |
621 | * reassembly.c |
622 | */ |
623 | extern const struct proto_ops inet6_stream_ops; |
624 | extern const struct proto_ops inet6_dgram_ops; |
625 | |
626 | struct group_source_req; |
627 | struct group_filter; |
628 | |
629 | extern int ip6_mc_source(int add, int omode, struct sock *sk, |
630 | struct group_source_req *pgsr); |
631 | extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); |
632 | extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, |
633 | struct group_filter __user *optval, |
634 | int __user *optlen); |
635 | extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr, |
636 | const struct in6_addr *daddr, u32 rnd); |
637 | |
638 | #ifdef CONFIG_PROC_FS |
639 | extern int ac6_proc_init(struct net *net); |
640 | extern void ac6_proc_exit(struct net *net); |
641 | extern int raw6_proc_init(void); |
642 | extern void raw6_proc_exit(void); |
643 | extern int tcp6_proc_init(struct net *net); |
644 | extern void tcp6_proc_exit(struct net *net); |
645 | extern int udp6_proc_init(struct net *net); |
646 | extern void udp6_proc_exit(struct net *net); |
647 | extern int udplite6_proc_init(void); |
648 | extern void udplite6_proc_exit(void); |
649 | extern int ipv6_misc_proc_init(void); |
650 | extern void ipv6_misc_proc_exit(void); |
651 | extern int snmp6_register_dev(struct inet6_dev *idev); |
652 | extern int snmp6_unregister_dev(struct inet6_dev *idev); |
653 | |
654 | #else |
655 | static inline int ac6_proc_init(struct net *net) { return 0; } |
656 | static inline void ac6_proc_exit(struct net *net) { } |
657 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } |
658 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } |
659 | #endif |
660 | |
661 | #ifdef CONFIG_SYSCTL |
662 | extern ctl_table ipv6_route_table_template[]; |
663 | extern ctl_table ipv6_icmp_table_template[]; |
664 | |
665 | extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
666 | extern struct ctl_table *ipv6_route_sysctl_init(struct net *net); |
667 | extern int ipv6_sysctl_register(void); |
668 | extern void ipv6_sysctl_unregister(void); |
669 | extern int ipv6_static_sysctl_register(void); |
670 | extern void ipv6_static_sysctl_unregister(void); |
671 | #endif |
672 | |
673 | #endif /* _NET_IPV6_H */ |
674 |
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