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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Linux INET6 implementation | |
3 | * | |
4 | * Authors: | |
5 | * Pedro Roque <roque@di.fc.ul.pt> | |
6 | * | |
1da177e4 LT |
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> | |
20283d84 | 18 | #include <net/if_inet6.h> |
1da177e4 LT |
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. */ | |
2b741653 | 42 | #define NEXTHDR_MOBILITY 135 /* Mobility header. */ |
1da177e4 LT |
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 | |
1da177e4 LT |
76 | |
77 | /* | |
78 | * Addr scopes | |
79 | */ | |
80 | #ifdef __KERNEL__ | |
81 | #define IPV6_ADDR_MC_SCOPE(a) \ | |
82 | ((a)->s6_addr[1] & 0x0f) /* nonstandard */ | |
83 | #define __IPV6_ADDR_SCOPE_INVALID -1 | |
84 | #endif | |
85 | #define IPV6_ADDR_SCOPE_NODELOCAL 0x01 | |
86 | #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02 | |
87 | #define IPV6_ADDR_SCOPE_SITELOCAL 0x05 | |
88 | #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08 | |
89 | #define IPV6_ADDR_SCOPE_GLOBAL 0x0e | |
90 | ||
91 | /* | |
92 | * fragmentation header | |
93 | */ | |
94 | ||
95 | struct frag_hdr { | |
44473a6b AV |
96 | __u8 nexthdr; |
97 | __u8 reserved; | |
98 | __be16 frag_off; | |
99 | __be32 identification; | |
1da177e4 LT |
100 | }; |
101 | ||
102 | #define IP6_MF 0x0001 | |
103 | ||
104 | #ifdef __KERNEL__ | |
105 | ||
106 | #include <net/sock.h> | |
107 | ||
108 | /* sysctls */ | |
1da177e4 | 109 | extern int sysctl_mld_max_msf; |
3d7cc2ba PE |
110 | extern struct ctl_path net_ipv6_ctl_path[]; |
111 | ||
087fe240 | 112 | #define _DEVINC(net, statname, modifier, idev, field) \ |
14878f75 | 113 | ({ \ |
a11d206d YH |
114 | struct inet6_dev *_idev = (idev); \ |
115 | if (likely(_idev != NULL)) \ | |
14878f75 | 116 | SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ |
9261e537 | 117 | SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ |
a11d206d | 118 | }) |
14878f75 | 119 | |
087fe240 | 120 | #define _DEVADD(net, statname, modifier, idev, field, val) \ |
8e7999c4 PE |
121 | ({ \ |
122 | struct inet6_dev *_idev = (idev); \ | |
123 | if (likely(_idev != NULL)) \ | |
124 | SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ | |
9261e537 | 125 | SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\ |
8e7999c4 PE |
126 | }) |
127 | ||
edf391ff NH |
128 | #define _DEVUPD(net, statname, modifier, idev, field, val) \ |
129 | ({ \ | |
130 | struct inet6_dev *_idev = (idev); \ | |
131 | if (likely(_idev != NULL)) \ | |
132 | SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \ | |
133 | SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\ | |
134 | }) | |
135 | ||
14878f75 | 136 | /* MIBs */ |
14878f75 | 137 | |
087fe240 | 138 | #define IP6_INC_STATS(net, idev,field) \ |
4ce3c183 | 139 | _DEVINC(net, ipv6, 64, idev, field) |
087fe240 | 140 | #define IP6_INC_STATS_BH(net, idev,field) \ |
4ce3c183 | 141 | _DEVINC(net, ipv6, 64_BH, idev, field) |
edf391ff | 142 | #define IP6_ADD_STATS(net, idev,field,val) \ |
4ce3c183 | 143 | _DEVADD(net, ipv6, 64, idev, field, val) |
087fe240 | 144 | #define IP6_ADD_STATS_BH(net, idev,field,val) \ |
4ce3c183 | 145 | _DEVADD(net, ipv6, 64_BH, idev, field, val) |
edf391ff | 146 | #define IP6_UPD_PO_STATS(net, idev,field,val) \ |
4ce3c183 | 147 | _DEVUPD(net, ipv6, 64, idev, field, val) |
edf391ff | 148 | #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \ |
4ce3c183 | 149 | _DEVUPD(net, ipv6, 64_BH, idev, field, val) |
087fe240 DL |
150 | #define ICMP6_INC_STATS(net, idev, field) \ |
151 | _DEVINC(net, icmpv6, , idev, field) | |
152 | #define ICMP6_INC_STATS_BH(net, idev, field) \ | |
153 | _DEVINC(net, icmpv6, _BH, idev, field) | |
154 | ||
155 | #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ | |
156 | _DEVINC(net, icmpv6msg, , idev, field +256) | |
157 | #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \ | |
158 | _DEVINC(net, icmpv6msg, _BH, idev, field +256) | |
159 | #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \ | |
160 | _DEVINC(net, icmpv6msg, _BH, idev, field) | |
14878f75 | 161 | |
fd2c3ef7 | 162 | struct ip6_ra_chain { |
1da177e4 LT |
163 | struct ip6_ra_chain *next; |
164 | struct sock *sk; | |
165 | int sel; | |
166 | void (*destructor)(struct sock *); | |
167 | }; | |
168 | ||
169 | extern struct ip6_ra_chain *ip6_ra_chain; | |
170 | extern rwlock_t ip6_ra_lock; | |
171 | ||
172 | /* | |
173 | This structure is prepared by protocol, when parsing | |
174 | ancillary data and passed to IPv6. | |
175 | */ | |
176 | ||
fd2c3ef7 | 177 | struct ipv6_txoptions { |
1da177e4 LT |
178 | /* Length of this structure */ |
179 | int tot_len; | |
180 | ||
181 | /* length of extension headers */ | |
182 | ||
183 | __u16 opt_flen; /* after fragment hdr */ | |
184 | __u16 opt_nflen; /* before fragment hdr */ | |
185 | ||
186 | struct ipv6_opt_hdr *hopopt; | |
187 | struct ipv6_opt_hdr *dst0opt; | |
188 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ | |
1da177e4 LT |
189 | struct ipv6_opt_hdr *dst1opt; |
190 | ||
191 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ | |
192 | }; | |
193 | ||
fd2c3ef7 | 194 | struct ip6_flowlabel { |
1da177e4 | 195 | struct ip6_flowlabel *next; |
90bcaf7b | 196 | __be32 label; |
db3459d1 | 197 | atomic_t users; |
1da177e4 LT |
198 | struct in6_addr dst; |
199 | struct ipv6_txoptions *opt; | |
1da177e4 LT |
200 | unsigned long linger; |
201 | u8 share; | |
202 | u32 owner; | |
203 | unsigned long lastuse; | |
204 | unsigned long expires; | |
60e8fbc4 | 205 | struct net *fl_net; |
1da177e4 LT |
206 | }; |
207 | ||
f3a7c66b HH |
208 | #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) |
209 | #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) | |
1da177e4 | 210 | |
fd2c3ef7 | 211 | struct ipv6_fl_socklist { |
1da177e4 LT |
212 | struct ipv6_fl_socklist *next; |
213 | struct ip6_flowlabel *fl; | |
214 | }; | |
215 | ||
90bcaf7b | 216 | extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
1da177e4 LT |
217 | extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, |
218 | struct ip6_flowlabel * fl, | |
219 | struct ipv6_txoptions * fopt); | |
220 | extern void fl6_free_socklist(struct sock *sk); | |
221 | extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); | |
0a3e78ac | 222 | extern int ip6_flowlabel_init(void); |
1da177e4 LT |
223 | extern void ip6_flowlabel_cleanup(void); |
224 | ||
225 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) | |
226 | { | |
227 | if (fl) | |
228 | atomic_dec(&fl->users); | |
229 | } | |
230 | ||
725a8ff0 | 231 | extern int ip6_ra_control(struct sock *sk, int sel); |
1da177e4 | 232 | |
e5bbef20 | 233 | extern int ipv6_parse_hopopts(struct sk_buff *skb); |
1da177e4 LT |
234 | |
235 | extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt); | |
333fad53 YH |
236 | extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, |
237 | int newtype, | |
238 | struct ipv6_opt_hdr __user *newopt, | |
239 | int newoptlen); | |
df9890c3 YH |
240 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
241 | struct ipv6_txoptions *opt); | |
1da177e4 | 242 | |
399c07de ACM |
243 | extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb); |
244 | ||
e5a2bb84 | 245 | int ip6_frag_nqueues(struct net *net); |
6ddc0822 | 246 | int ip6_frag_mem(struct net *net); |
1da177e4 | 247 | |
9874c41c JP |
248 | #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */ |
249 | #define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */ | |
250 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ | |
1da177e4 | 251 | |
b1cacb68 YH |
252 | extern int __ipv6_addr_type(const struct in6_addr *addr); |
253 | static inline int ipv6_addr_type(const struct in6_addr *addr) | |
254 | { | |
255 | return __ipv6_addr_type(addr) & 0xffff; | |
256 | } | |
1da177e4 LT |
257 | |
258 | static inline int ipv6_addr_scope(const struct in6_addr *addr) | |
259 | { | |
b1cacb68 YH |
260 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
261 | } | |
262 | ||
263 | static inline int __ipv6_addr_src_scope(int type) | |
264 | { | |
a02cec21 | 265 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
b1cacb68 YH |
266 | } |
267 | ||
268 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) | |
269 | { | |
270 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); | |
1da177e4 LT |
271 | } |
272 | ||
273 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) | |
274 | { | |
db3459d1 | 275 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
1da177e4 LT |
276 | } |
277 | ||
f2ffd9ee PM |
278 | static inline int |
279 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, | |
280 | const struct in6_addr *a2) | |
281 | { | |
a02cec21 ED |
282 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
283 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | | |
284 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | | |
285 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); | |
f2ffd9ee PM |
286 | } |
287 | ||
1da177e4 LT |
288 | static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2) |
289 | { | |
db3459d1 | 290 | memcpy(a1, a2, sizeof(struct in6_addr)); |
1da177e4 LT |
291 | } |
292 | ||
293 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, | |
294 | const struct in6_addr *addr, | |
295 | int plen) | |
296 | { | |
297 | /* caller must guarantee 0 <= plen <= 128 */ | |
298 | int o = plen >> 3, | |
299 | b = plen & 0x7; | |
300 | ||
db3459d1 | 301 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
1da177e4 | 302 | memcpy(pfx->s6_addr, addr, o); |
db3459d1 | 303 | if (b != 0) |
1da177e4 | 304 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
1da177e4 LT |
305 | } |
306 | ||
1da177e4 | 307 | static inline void ipv6_addr_set(struct in6_addr *addr, |
48818f82 AV |
308 | __be32 w1, __be32 w2, |
309 | __be32 w3, __be32 w4) | |
1da177e4 LT |
310 | { |
311 | addr->s6_addr32[0] = w1; | |
312 | addr->s6_addr32[1] = w2; | |
313 | addr->s6_addr32[2] = w3; | |
314 | addr->s6_addr32[3] = w4; | |
315 | } | |
1da177e4 LT |
316 | |
317 | static inline int ipv6_addr_equal(const struct in6_addr *a1, | |
318 | const struct in6_addr *a2) | |
319 | { | |
a02cec21 ED |
320 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
321 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | | |
322 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | | |
323 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; | |
1da177e4 LT |
324 | } |
325 | ||
48818f82 | 326 | static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2, |
1da177e4 LT |
327 | unsigned int prefixlen) |
328 | { | |
329 | unsigned pdw, pbi; | |
330 | ||
331 | /* check complete u32 in prefix */ | |
332 | pdw = prefixlen >> 5; | |
333 | if (pdw && memcmp(a1, a2, pdw << 2)) | |
334 | return 0; | |
335 | ||
336 | /* check incomplete u32 in prefix */ | |
337 | pbi = prefixlen & 0x1f; | |
338 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) | |
339 | return 0; | |
340 | ||
341 | return 1; | |
342 | } | |
343 | ||
344 | static inline int ipv6_prefix_equal(const struct in6_addr *a1, | |
345 | const struct in6_addr *a2, | |
346 | unsigned int prefixlen) | |
347 | { | |
348 | return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32, | |
349 | prefixlen); | |
350 | } | |
351 | ||
2588fe1d | 352 | struct inet_frag_queue; |
2588fe1d | 353 | |
0b5ccb2e PM |
354 | enum ip6_defrag_users { |
355 | IP6_DEFRAG_LOCAL_DELIVER, | |
356 | IP6_DEFRAG_CONNTRACK_IN, | |
4be929be | 357 | __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
0b5ccb2e | 358 | IP6_DEFRAG_CONNTRACK_OUT, |
4be929be | 359 | __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
8fa9ff68 | 360 | IP6_DEFRAG_CONNTRACK_BRIDGE_IN, |
4be929be | 361 | __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
0b5ccb2e PM |
362 | }; |
363 | ||
c6fda282 PE |
364 | struct ip6_create_arg { |
365 | __be32 id; | |
0b5ccb2e | 366 | u32 user; |
c6fda282 PE |
367 | struct in6_addr *src; |
368 | struct in6_addr *dst; | |
369 | }; | |
370 | ||
371 | void ip6_frag_init(struct inet_frag_queue *q, void *a); | |
abd6523d | 372 | int ip6_frag_match(struct inet_frag_queue *q, void *a); |
c6fda282 | 373 | |
1da177e4 LT |
374 | static inline int ipv6_addr_any(const struct in6_addr *a) |
375 | { | |
a02cec21 ED |
376 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
377 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; | |
1da177e4 LT |
378 | } |
379 | ||
f630e43a YH |
380 | static inline int ipv6_addr_loopback(const struct in6_addr *a) |
381 | { | |
a02cec21 ED |
382 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
383 | a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0; | |
f630e43a YH |
384 | } |
385 | ||
e773e4fa BH |
386 | static inline int ipv6_addr_v4mapped(const struct in6_addr *a) |
387 | { | |
a02cec21 ED |
388 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
389 | (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0; | |
e773e4fa BH |
390 | } |
391 | ||
99cd07a5 JMT |
392 | /* |
393 | * Check for a RFC 4843 ORCHID address | |
394 | * (Overlay Routable Cryptographic Hash Identifiers) | |
395 | */ | |
396 | static inline int ipv6_addr_orchid(const struct in6_addr *a) | |
397 | { | |
a02cec21 | 398 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
99cd07a5 JMT |
399 | } |
400 | ||
f15364bd AC |
401 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
402 | struct in6_addr *v4mapped) | |
403 | { | |
404 | ipv6_addr_set(v4mapped, | |
405 | 0, 0, | |
406 | htonl(0x0000FFFF), | |
407 | addr); | |
408 | } | |
409 | ||
971f359d YH |
410 | /* |
411 | * find the first different bit between two addresses | |
412 | * length of address must be a multiple of 32bits | |
413 | */ | |
414 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) | |
415 | { | |
ef296f56 | 416 | const __be32 *a1 = token1, *a2 = token2; |
971f359d YH |
417 | int i; |
418 | ||
419 | addrlen >>= 2; | |
420 | ||
421 | for (i = 0; i < addrlen; i++) { | |
ef296f56 AV |
422 | __be32 xb = a1[i] ^ a2[i]; |
423 | if (xb) | |
d57b8fb8 | 424 | return i * 32 + 31 - __fls(ntohl(xb)); |
971f359d YH |
425 | } |
426 | ||
427 | /* | |
428 | * we should *never* get to this point since that | |
429 | * would mean the addrs are equal | |
430 | * | |
431 | * However, we do get to it 8) And exacly, when | |
432 | * addresses are equal 8) | |
433 | * | |
434 | * ip route add 1111::/128 via ... | |
435 | * ip route add 1111::/64 via ... | |
436 | * and we are here. | |
437 | * | |
438 | * Ideally, this function should stop comparison | |
439 | * at prefix length. It does not, but it is still OK, | |
440 | * if returned value is greater than prefix length. | |
441 | * --ANK (980803) | |
442 | */ | |
a02cec21 | 443 | return addrlen << 5; |
971f359d YH |
444 | } |
445 | ||
446 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) | |
447 | { | |
448 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); | |
449 | } | |
450 | ||
7ea2f2c5 SS |
451 | static __inline__ void ipv6_select_ident(struct frag_hdr *fhdr) |
452 | { | |
453 | static u32 ipv6_fragmentation_id = 1; | |
454 | static DEFINE_SPINLOCK(ip6_id_lock); | |
455 | ||
456 | spin_lock_bh(&ip6_id_lock); | |
457 | fhdr->identification = htonl(ipv6_fragmentation_id); | |
458 | if (++ipv6_fragmentation_id == 0) | |
459 | ipv6_fragmentation_id = 1; | |
460 | spin_unlock_bh(&ip6_id_lock); | |
461 | } | |
462 | ||
1da177e4 LT |
463 | /* |
464 | * Prototypes exported by ipv6 | |
465 | */ | |
466 | ||
467 | /* | |
468 | * rcv function (called from netdevice level) | |
469 | */ | |
470 | ||
471 | extern int ipv6_rcv(struct sk_buff *skb, | |
472 | struct net_device *dev, | |
f2ccd8fa DM |
473 | struct packet_type *pt, |
474 | struct net_device *orig_dev); | |
1da177e4 | 475 | |
b05e1066 PM |
476 | extern int ip6_rcv_finish(struct sk_buff *skb); |
477 | ||
1da177e4 LT |
478 | /* |
479 | * upper-layer output functions | |
480 | */ | |
481 | extern int ip6_xmit(struct sock *sk, | |
482 | struct sk_buff *skb, | |
483 | struct flowi *fl, | |
4e15ed4d | 484 | struct ipv6_txoptions *opt); |
1da177e4 LT |
485 | |
486 | extern int ip6_nd_hdr(struct sock *sk, | |
487 | struct sk_buff *skb, | |
488 | struct net_device *dev, | |
9acd9f3a YH |
489 | const struct in6_addr *saddr, |
490 | const struct in6_addr *daddr, | |
1da177e4 LT |
491 | int proto, int len); |
492 | ||
493 | extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); | |
494 | ||
495 | extern int ip6_append_data(struct sock *sk, | |
496 | int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), | |
497 | void *from, | |
498 | int length, | |
499 | int transhdrlen, | |
500 | int hlimit, | |
41a1f8ea | 501 | int tclass, |
1da177e4 LT |
502 | struct ipv6_txoptions *opt, |
503 | struct flowi *fl, | |
504 | struct rt6_info *rt, | |
13b52cd4 BH |
505 | unsigned int flags, |
506 | int dontfrag); | |
1da177e4 LT |
507 | |
508 | extern int ip6_push_pending_frames(struct sock *sk); | |
509 | ||
510 | extern void ip6_flush_pending_frames(struct sock *sk); | |
511 | ||
512 | extern int ip6_dst_lookup(struct sock *sk, | |
513 | struct dst_entry **dst, | |
514 | struct flowi *fl); | |
14e50e57 DM |
515 | extern int ip6_dst_blackhole(struct sock *sk, |
516 | struct dst_entry **dst, | |
517 | struct flowi *fl); | |
497c615a HX |
518 | extern int ip6_sk_dst_lookup(struct sock *sk, |
519 | struct dst_entry **dst, | |
520 | struct flowi *fl); | |
1da177e4 LT |
521 | |
522 | /* | |
523 | * skb processing functions | |
524 | */ | |
525 | ||
526 | extern int ip6_output(struct sk_buff *skb); | |
527 | extern int ip6_forward(struct sk_buff *skb); | |
528 | extern int ip6_input(struct sk_buff *skb); | |
529 | extern int ip6_mc_input(struct sk_buff *skb); | |
530 | ||
ef76bc23 HX |
531 | extern int __ip6_local_out(struct sk_buff *skb); |
532 | extern int ip6_local_out(struct sk_buff *skb); | |
533 | ||
1da177e4 LT |
534 | /* |
535 | * Extension header (options) processing | |
536 | */ | |
537 | ||
1da177e4 LT |
538 | extern void ipv6_push_nfrag_opts(struct sk_buff *skb, |
539 | struct ipv6_txoptions *opt, | |
540 | u8 *proto, | |
541 | struct in6_addr **daddr_p); | |
542 | extern void ipv6_push_frag_opts(struct sk_buff *skb, | |
543 | struct ipv6_txoptions *opt, | |
544 | u8 *proto); | |
545 | ||
546 | extern int ipv6_skip_exthdr(const struct sk_buff *, int start, | |
0d3d077c | 547 | u8 *nexthdrp); |
1da177e4 LT |
548 | |
549 | extern int ipv6_ext_hdr(u8 nexthdr); | |
550 | ||
c61a4043 MN |
551 | extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type); |
552 | ||
20c59de2 AE |
553 | extern struct in6_addr *fl6_update_dst(struct flowi *fl, |
554 | const struct ipv6_txoptions *opt, | |
555 | struct in6_addr *orig); | |
556 | ||
1da177e4 LT |
557 | /* |
558 | * socket options (ipv6_sockglue.c) | |
559 | */ | |
560 | ||
561 | extern int ipv6_setsockopt(struct sock *sk, int level, | |
562 | int optname, | |
563 | char __user *optval, | |
b7058842 | 564 | unsigned int optlen); |
1da177e4 LT |
565 | extern int ipv6_getsockopt(struct sock *sk, int level, |
566 | int optname, | |
567 | char __user *optval, | |
568 | int __user *optlen); | |
3fdadf7d DM |
569 | extern int compat_ipv6_setsockopt(struct sock *sk, |
570 | int level, | |
571 | int optname, | |
572 | char __user *optval, | |
b7058842 | 573 | unsigned int optlen); |
3fdadf7d DM |
574 | extern int compat_ipv6_getsockopt(struct sock *sk, |
575 | int level, | |
576 | int optname, | |
577 | char __user *optval, | |
578 | int __user *optlen); | |
1da177e4 | 579 | |
1da177e4 LT |
580 | extern int ip6_datagram_connect(struct sock *sk, |
581 | struct sockaddr *addr, int addr_len); | |
582 | ||
583 | extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len); | |
4b340ae2 | 584 | extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len); |
e69a4adc | 585 | extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
1da177e4 LT |
586 | u32 info, u8 *payload); |
587 | extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info); | |
4b340ae2 | 588 | extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi *fl, u32 mtu); |
1da177e4 LT |
589 | |
590 | extern int inet6_release(struct socket *sock); | |
591 | extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, | |
592 | int addr_len); | |
593 | extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr, | |
594 | int *uaddr_len, int peer); | |
595 | extern int inet6_ioctl(struct socket *sock, unsigned int cmd, | |
596 | unsigned long arg); | |
597 | ||
d8313f5c ACM |
598 | extern int inet6_hash_connect(struct inet_timewait_death_row *death_row, |
599 | struct sock *sk); | |
600 | ||
1da177e4 LT |
601 | /* |
602 | * reassembly.c | |
603 | */ | |
90ddc4f0 ED |
604 | extern const struct proto_ops inet6_stream_ops; |
605 | extern const struct proto_ops inet6_dgram_ops; | |
20380731 | 606 | |
14c85021 ACM |
607 | struct group_source_req; |
608 | struct group_filter; | |
609 | ||
20380731 ACM |
610 | extern int ip6_mc_source(int add, int omode, struct sock *sk, |
611 | struct group_source_req *pgsr); | |
612 | extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); | |
613 | extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
614 | struct group_filter __user *optval, | |
615 | int __user *optlen); | |
93c8b90f IJ |
616 | extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr, |
617 | const struct in6_addr *daddr, u32 rnd); | |
20380731 ACM |
618 | |
619 | #ifdef CONFIG_PROC_FS | |
6ab57e7e DL |
620 | extern int ac6_proc_init(struct net *net); |
621 | extern void ac6_proc_exit(struct net *net); | |
20380731 ACM |
622 | extern int raw6_proc_init(void); |
623 | extern void raw6_proc_exit(void); | |
6f8b13bc DL |
624 | extern int tcp6_proc_init(struct net *net); |
625 | extern void tcp6_proc_exit(struct net *net); | |
0c96d8c5 DL |
626 | extern int udp6_proc_init(struct net *net); |
627 | extern void udp6_proc_exit(struct net *net); | |
ba4e58ec GR |
628 | extern int udplite6_proc_init(void); |
629 | extern void udplite6_proc_exit(void); | |
20380731 ACM |
630 | extern int ipv6_misc_proc_init(void); |
631 | extern void ipv6_misc_proc_exit(void); | |
7f7d9a6b HX |
632 | extern int snmp6_register_dev(struct inet6_dev *idev); |
633 | extern int snmp6_unregister_dev(struct inet6_dev *idev); | |
20380731 | 634 | |
7f7d9a6b | 635 | #else |
6ab57e7e DL |
636 | static inline int ac6_proc_init(struct net *net) { return 0; } |
637 | static inline void ac6_proc_exit(struct net *net) { } | |
638 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } | |
639 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } | |
20380731 | 640 | #endif |
1da177e4 | 641 | |
20380731 | 642 | #ifdef CONFIG_SYSCTL |
760f2d01 DL |
643 | extern ctl_table ipv6_route_table_template[]; |
644 | extern ctl_table ipv6_icmp_table_template[]; | |
1da177e4 | 645 | |
6de1a910 DL |
646 | extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
647 | extern struct ctl_table *ipv6_route_sysctl_init(struct net *net); | |
291480c0 | 648 | extern int ipv6_sysctl_register(void); |
20380731 | 649 | extern void ipv6_sysctl_unregister(void); |
eeb61f71 AV |
650 | extern int ipv6_static_sysctl_register(void); |
651 | extern void ipv6_static_sysctl_unregister(void); | |
20380731 | 652 | #endif |
1da177e4 | 653 | |
20380731 ACM |
654 | #endif /* __KERNEL__ */ |
655 | #endif /* _NET_IPV6_H */ |