]>
Commit | Line | Data |
---|---|---|
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 | */ | |
1da177e4 LT |
80 | #define IPV6_ADDR_MC_SCOPE(a) \ |
81 | ((a)->s6_addr[1] & 0x0f) /* nonstandard */ | |
82 | #define __IPV6_ADDR_SCOPE_INVALID -1 | |
1da177e4 LT |
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 | ||
5ced1339 LL |
89 | /* |
90 | * Addr flags | |
91 | */ | |
5ced1339 LL |
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) | |
5ced1339 | 98 | |
1da177e4 LT |
99 | /* |
100 | * fragmentation header | |
101 | */ | |
102 | ||
103 | struct frag_hdr { | |
44473a6b AV |
104 | __u8 nexthdr; |
105 | __u8 reserved; | |
106 | __be16 frag_off; | |
107 | __be32 identification; | |
1da177e4 LT |
108 | }; |
109 | ||
110 | #define IP6_MF 0x0001 | |
111 | ||
1da177e4 LT |
112 | #include <net/sock.h> |
113 | ||
114 | /* sysctls */ | |
1da177e4 | 115 | extern int sysctl_mld_max_msf; |
3d7cc2ba | 116 | |
087fe240 | 117 | #define _DEVINC(net, statname, modifier, idev, field) \ |
14878f75 | 118 | ({ \ |
a11d206d YH |
119 | struct inet6_dev *_idev = (idev); \ |
120 | if (likely(_idev != NULL)) \ | |
14878f75 | 121 | SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ |
9261e537 | 122 | SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ |
a11d206d | 123 | }) |
14878f75 | 124 | |
be281e55 ED |
125 | /* per device counters are atomic_long_t */ |
126 | #define _DEVINCATOMIC(net, statname, modifier, idev, field) \ | |
127 | ({ \ | |
128 | struct inet6_dev *_idev = (idev); \ | |
129 | if (likely(_idev != NULL)) \ | |
130 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
131 | SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ | |
132 | }) | |
133 | ||
2a24444f ED |
134 | /* per device and per net counters are atomic_long_t */ |
135 | #define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \ | |
136 | ({ \ | |
137 | struct inet6_dev *_idev = (idev); \ | |
138 | if (likely(_idev != NULL)) \ | |
139 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ | |
140 | SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\ | |
141 | }) | |
142 | ||
087fe240 | 143 | #define _DEVADD(net, statname, modifier, idev, field, val) \ |
8e7999c4 PE |
144 | ({ \ |
145 | struct inet6_dev *_idev = (idev); \ | |
146 | if (likely(_idev != NULL)) \ | |
147 | SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ | |
9261e537 | 148 | SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\ |
8e7999c4 PE |
149 | }) |
150 | ||
edf391ff NH |
151 | #define _DEVUPD(net, statname, modifier, idev, field, val) \ |
152 | ({ \ | |
153 | struct inet6_dev *_idev = (idev); \ | |
154 | if (likely(_idev != NULL)) \ | |
155 | SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \ | |
156 | SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\ | |
157 | }) | |
158 | ||
14878f75 | 159 | /* MIBs */ |
14878f75 | 160 | |
087fe240 | 161 | #define IP6_INC_STATS(net, idev,field) \ |
4ce3c183 | 162 | _DEVINC(net, ipv6, 64, idev, field) |
087fe240 | 163 | #define IP6_INC_STATS_BH(net, idev,field) \ |
4ce3c183 | 164 | _DEVINC(net, ipv6, 64_BH, idev, field) |
edf391ff | 165 | #define IP6_ADD_STATS(net, idev,field,val) \ |
4ce3c183 | 166 | _DEVADD(net, ipv6, 64, idev, field, val) |
087fe240 | 167 | #define IP6_ADD_STATS_BH(net, idev,field,val) \ |
4ce3c183 | 168 | _DEVADD(net, ipv6, 64_BH, idev, field, val) |
edf391ff | 169 | #define IP6_UPD_PO_STATS(net, idev,field,val) \ |
4ce3c183 | 170 | _DEVUPD(net, ipv6, 64, idev, field, val) |
edf391ff | 171 | #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \ |
4ce3c183 | 172 | _DEVUPD(net, ipv6, 64_BH, idev, field, val) |
087fe240 | 173 | #define ICMP6_INC_STATS(net, idev, field) \ |
be281e55 | 174 | _DEVINCATOMIC(net, icmpv6, , idev, field) |
087fe240 | 175 | #define ICMP6_INC_STATS_BH(net, idev, field) \ |
be281e55 | 176 | _DEVINCATOMIC(net, icmpv6, _BH, idev, field) |
087fe240 DL |
177 | |
178 | #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ | |
2a24444f | 179 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
087fe240 | 180 | #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \ |
2a24444f | 181 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
087fe240 | 182 | #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \ |
2a24444f | 183 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field) |
14878f75 | 184 | |
fd2c3ef7 | 185 | struct ip6_ra_chain { |
1da177e4 LT |
186 | struct ip6_ra_chain *next; |
187 | struct sock *sk; | |
188 | int sel; | |
189 | void (*destructor)(struct sock *); | |
190 | }; | |
191 | ||
192 | extern struct ip6_ra_chain *ip6_ra_chain; | |
193 | extern rwlock_t ip6_ra_lock; | |
194 | ||
195 | /* | |
196 | This structure is prepared by protocol, when parsing | |
197 | ancillary data and passed to IPv6. | |
198 | */ | |
199 | ||
fd2c3ef7 | 200 | struct ipv6_txoptions { |
1da177e4 LT |
201 | /* Length of this structure */ |
202 | int tot_len; | |
203 | ||
204 | /* length of extension headers */ | |
205 | ||
206 | __u16 opt_flen; /* after fragment hdr */ | |
207 | __u16 opt_nflen; /* before fragment hdr */ | |
208 | ||
209 | struct ipv6_opt_hdr *hopopt; | |
210 | struct ipv6_opt_hdr *dst0opt; | |
211 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ | |
1da177e4 LT |
212 | struct ipv6_opt_hdr *dst1opt; |
213 | ||
214 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ | |
215 | }; | |
216 | ||
fd2c3ef7 | 217 | struct ip6_flowlabel { |
1da177e4 | 218 | struct ip6_flowlabel *next; |
90bcaf7b | 219 | __be32 label; |
db3459d1 | 220 | atomic_t users; |
1da177e4 LT |
221 | struct in6_addr dst; |
222 | struct ipv6_txoptions *opt; | |
1da177e4 LT |
223 | unsigned long linger; |
224 | u8 share; | |
225 | u32 owner; | |
226 | unsigned long lastuse; | |
227 | unsigned long expires; | |
60e8fbc4 | 228 | struct net *fl_net; |
1da177e4 LT |
229 | }; |
230 | ||
f3a7c66b HH |
231 | #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) |
232 | #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) | |
1da177e4 | 233 | |
fd2c3ef7 | 234 | struct ipv6_fl_socklist { |
1da177e4 LT |
235 | struct ipv6_fl_socklist *next; |
236 | struct ip6_flowlabel *fl; | |
237 | }; | |
238 | ||
90bcaf7b | 239 | extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
1da177e4 LT |
240 | extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, |
241 | struct ip6_flowlabel * fl, | |
242 | struct ipv6_txoptions * fopt); | |
243 | extern void fl6_free_socklist(struct sock *sk); | |
244 | extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); | |
0a3e78ac | 245 | extern int ip6_flowlabel_init(void); |
1da177e4 LT |
246 | extern void ip6_flowlabel_cleanup(void); |
247 | ||
248 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) | |
249 | { | |
250 | if (fl) | |
251 | atomic_dec(&fl->users); | |
252 | } | |
253 | ||
725a8ff0 | 254 | extern int ip6_ra_control(struct sock *sk, int sel); |
1da177e4 | 255 | |
e5bbef20 | 256 | extern int ipv6_parse_hopopts(struct sk_buff *skb); |
1da177e4 LT |
257 | |
258 | extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt); | |
333fad53 YH |
259 | extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, |
260 | int newtype, | |
261 | struct ipv6_opt_hdr __user *newopt, | |
262 | int newoptlen); | |
df9890c3 YH |
263 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
264 | struct ipv6_txoptions *opt); | |
1da177e4 | 265 | |
399c07de ACM |
266 | extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb); |
267 | ||
e5a2bb84 | 268 | int ip6_frag_nqueues(struct net *net); |
6ddc0822 | 269 | int ip6_frag_mem(struct net *net); |
1da177e4 | 270 | |
9874c41c JP |
271 | #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */ |
272 | #define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */ | |
273 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ | |
1da177e4 | 274 | |
b1cacb68 YH |
275 | extern int __ipv6_addr_type(const struct in6_addr *addr); |
276 | static inline int ipv6_addr_type(const struct in6_addr *addr) | |
277 | { | |
278 | return __ipv6_addr_type(addr) & 0xffff; | |
279 | } | |
1da177e4 LT |
280 | |
281 | static inline int ipv6_addr_scope(const struct in6_addr *addr) | |
282 | { | |
b1cacb68 YH |
283 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
284 | } | |
285 | ||
286 | static inline int __ipv6_addr_src_scope(int type) | |
287 | { | |
a02cec21 | 288 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
b1cacb68 YH |
289 | } |
290 | ||
291 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) | |
292 | { | |
293 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); | |
1da177e4 LT |
294 | } |
295 | ||
296 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) | |
297 | { | |
db3459d1 | 298 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
1da177e4 LT |
299 | } |
300 | ||
f2ffd9ee PM |
301 | static inline int |
302 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, | |
303 | const struct in6_addr *a2) | |
304 | { | |
a02cec21 ED |
305 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
306 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | | |
307 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | | |
308 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); | |
f2ffd9ee PM |
309 | } |
310 | ||
1da177e4 LT |
311 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
312 | const struct in6_addr *addr, | |
313 | int plen) | |
314 | { | |
315 | /* caller must guarantee 0 <= plen <= 128 */ | |
316 | int o = plen >> 3, | |
317 | b = plen & 0x7; | |
318 | ||
db3459d1 | 319 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
1da177e4 | 320 | memcpy(pfx->s6_addr, addr, o); |
db3459d1 | 321 | if (b != 0) |
1da177e4 | 322 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
1da177e4 LT |
323 | } |
324 | ||
1da177e4 | 325 | static inline void ipv6_addr_set(struct in6_addr *addr, |
48818f82 AV |
326 | __be32 w1, __be32 w2, |
327 | __be32 w3, __be32 w4) | |
1da177e4 LT |
328 | { |
329 | addr->s6_addr32[0] = w1; | |
330 | addr->s6_addr32[1] = w2; | |
331 | addr->s6_addr32[2] = w3; | |
332 | addr->s6_addr32[3] = w4; | |
333 | } | |
1da177e4 LT |
334 | |
335 | static inline int ipv6_addr_equal(const struct in6_addr *a1, | |
336 | const struct in6_addr *a2) | |
337 | { | |
a02cec21 ED |
338 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
339 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | | |
340 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | | |
341 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; | |
1da177e4 LT |
342 | } |
343 | ||
48818f82 | 344 | static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2, |
1da177e4 LT |
345 | unsigned int prefixlen) |
346 | { | |
95c96174 | 347 | unsigned int pdw, pbi; |
1da177e4 LT |
348 | |
349 | /* check complete u32 in prefix */ | |
350 | pdw = prefixlen >> 5; | |
351 | if (pdw && memcmp(a1, a2, pdw << 2)) | |
352 | return 0; | |
353 | ||
354 | /* check incomplete u32 in prefix */ | |
355 | pbi = prefixlen & 0x1f; | |
356 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) | |
357 | return 0; | |
358 | ||
359 | return 1; | |
360 | } | |
361 | ||
362 | static inline int ipv6_prefix_equal(const struct in6_addr *a1, | |
363 | const struct in6_addr *a2, | |
364 | unsigned int prefixlen) | |
365 | { | |
366 | return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32, | |
367 | prefixlen); | |
368 | } | |
369 | ||
2588fe1d | 370 | struct inet_frag_queue; |
2588fe1d | 371 | |
0b5ccb2e PM |
372 | enum ip6_defrag_users { |
373 | IP6_DEFRAG_LOCAL_DELIVER, | |
374 | IP6_DEFRAG_CONNTRACK_IN, | |
4be929be | 375 | __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
0b5ccb2e | 376 | IP6_DEFRAG_CONNTRACK_OUT, |
4be929be | 377 | __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
8fa9ff68 | 378 | IP6_DEFRAG_CONNTRACK_BRIDGE_IN, |
4be929be | 379 | __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
0b5ccb2e PM |
380 | }; |
381 | ||
c6fda282 PE |
382 | struct ip6_create_arg { |
383 | __be32 id; | |
0b5ccb2e | 384 | u32 user; |
b71d1d42 ED |
385 | const struct in6_addr *src; |
386 | const struct in6_addr *dst; | |
c6fda282 PE |
387 | }; |
388 | ||
389 | void ip6_frag_init(struct inet_frag_queue *q, void *a); | |
abd6523d | 390 | int ip6_frag_match(struct inet_frag_queue *q, void *a); |
c6fda282 | 391 | |
1da177e4 LT |
392 | static inline int ipv6_addr_any(const struct in6_addr *a) |
393 | { | |
a02cec21 ED |
394 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
395 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; | |
1da177e4 LT |
396 | } |
397 | ||
f630e43a YH |
398 | static inline int ipv6_addr_loopback(const struct in6_addr *a) |
399 | { | |
a02cec21 ED |
400 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
401 | a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0; | |
f630e43a YH |
402 | } |
403 | ||
e773e4fa BH |
404 | static inline int ipv6_addr_v4mapped(const struct in6_addr *a) |
405 | { | |
a02cec21 ED |
406 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
407 | (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0; | |
e773e4fa BH |
408 | } |
409 | ||
99cd07a5 JMT |
410 | /* |
411 | * Check for a RFC 4843 ORCHID address | |
412 | * (Overlay Routable Cryptographic Hash Identifiers) | |
413 | */ | |
414 | static inline int ipv6_addr_orchid(const struct in6_addr *a) | |
415 | { | |
a02cec21 | 416 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
99cd07a5 JMT |
417 | } |
418 | ||
f15364bd AC |
419 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
420 | struct in6_addr *v4mapped) | |
421 | { | |
422 | ipv6_addr_set(v4mapped, | |
423 | 0, 0, | |
424 | htonl(0x0000FFFF), | |
425 | addr); | |
426 | } | |
427 | ||
971f359d YH |
428 | /* |
429 | * find the first different bit between two addresses | |
430 | * length of address must be a multiple of 32bits | |
431 | */ | |
432 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) | |
433 | { | |
ef296f56 | 434 | const __be32 *a1 = token1, *a2 = token2; |
971f359d YH |
435 | int i; |
436 | ||
437 | addrlen >>= 2; | |
438 | ||
439 | for (i = 0; i < addrlen; i++) { | |
ef296f56 AV |
440 | __be32 xb = a1[i] ^ a2[i]; |
441 | if (xb) | |
d57b8fb8 | 442 | return i * 32 + 31 - __fls(ntohl(xb)); |
971f359d YH |
443 | } |
444 | ||
445 | /* | |
446 | * we should *never* get to this point since that | |
447 | * would mean the addrs are equal | |
448 | * | |
449 | * However, we do get to it 8) And exacly, when | |
450 | * addresses are equal 8) | |
451 | * | |
452 | * ip route add 1111::/128 via ... | |
453 | * ip route add 1111::/64 via ... | |
454 | * and we are here. | |
455 | * | |
456 | * Ideally, this function should stop comparison | |
457 | * at prefix length. It does not, but it is still OK, | |
458 | * if returned value is greater than prefix length. | |
459 | * --ANK (980803) | |
460 | */ | |
a02cec21 | 461 | return addrlen << 5; |
971f359d YH |
462 | } |
463 | ||
464 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) | |
465 | { | |
466 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); | |
467 | } | |
468 | ||
87c48fa3 | 469 | extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt); |
7ea2f2c5 | 470 | |
1da177e4 LT |
471 | /* |
472 | * Prototypes exported by ipv6 | |
473 | */ | |
474 | ||
475 | /* | |
476 | * rcv function (called from netdevice level) | |
477 | */ | |
478 | ||
479 | extern int ipv6_rcv(struct sk_buff *skb, | |
480 | struct net_device *dev, | |
f2ccd8fa DM |
481 | struct packet_type *pt, |
482 | struct net_device *orig_dev); | |
1da177e4 | 483 | |
b05e1066 PM |
484 | extern int ip6_rcv_finish(struct sk_buff *skb); |
485 | ||
1da177e4 LT |
486 | /* |
487 | * upper-layer output functions | |
488 | */ | |
489 | extern int ip6_xmit(struct sock *sk, | |
490 | struct sk_buff *skb, | |
4c9483b2 | 491 | struct flowi6 *fl6, |
b903d324 ED |
492 | struct ipv6_txoptions *opt, |
493 | int tclass); | |
1da177e4 LT |
494 | |
495 | extern int ip6_nd_hdr(struct sock *sk, | |
496 | struct sk_buff *skb, | |
497 | struct net_device *dev, | |
9acd9f3a YH |
498 | const struct in6_addr *saddr, |
499 | const struct in6_addr *daddr, | |
1da177e4 LT |
500 | int proto, int len); |
501 | ||
502 | extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); | |
503 | ||
504 | extern int ip6_append_data(struct sock *sk, | |
505 | int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), | |
506 | void *from, | |
507 | int length, | |
508 | int transhdrlen, | |
509 | int hlimit, | |
41a1f8ea | 510 | int tclass, |
1da177e4 | 511 | struct ipv6_txoptions *opt, |
4c9483b2 | 512 | struct flowi6 *fl6, |
1da177e4 | 513 | struct rt6_info *rt, |
13b52cd4 BH |
514 | unsigned int flags, |
515 | int dontfrag); | |
1da177e4 LT |
516 | |
517 | extern int ip6_push_pending_frames(struct sock *sk); | |
518 | ||
519 | extern void ip6_flush_pending_frames(struct sock *sk); | |
520 | ||
521 | extern int ip6_dst_lookup(struct sock *sk, | |
522 | struct dst_entry **dst, | |
4c9483b2 | 523 | struct flowi6 *fl6); |
68d0c6d3 | 524 | extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk, |
4c9483b2 | 525 | struct flowi6 *fl6, |
68d0c6d3 | 526 | const struct in6_addr *final_dst, |
a1414715 | 527 | bool can_sleep); |
68d0c6d3 | 528 | extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk, |
4c9483b2 | 529 | struct flowi6 *fl6, |
68d0c6d3 | 530 | const struct in6_addr *final_dst, |
a1414715 | 531 | bool can_sleep); |
2774c131 DM |
532 | extern struct dst_entry * ip6_blackhole_route(struct net *net, |
533 | struct dst_entry *orig_dst); | |
1da177e4 LT |
534 | |
535 | /* | |
536 | * skb processing functions | |
537 | */ | |
538 | ||
539 | extern int ip6_output(struct sk_buff *skb); | |
540 | extern int ip6_forward(struct sk_buff *skb); | |
541 | extern int ip6_input(struct sk_buff *skb); | |
542 | extern int ip6_mc_input(struct sk_buff *skb); | |
543 | ||
ef76bc23 HX |
544 | extern int __ip6_local_out(struct sk_buff *skb); |
545 | extern int ip6_local_out(struct sk_buff *skb); | |
546 | ||
1da177e4 LT |
547 | /* |
548 | * Extension header (options) processing | |
549 | */ | |
550 | ||
1da177e4 LT |
551 | extern void ipv6_push_nfrag_opts(struct sk_buff *skb, |
552 | struct ipv6_txoptions *opt, | |
553 | u8 *proto, | |
554 | struct in6_addr **daddr_p); | |
555 | extern void ipv6_push_frag_opts(struct sk_buff *skb, | |
556 | struct ipv6_txoptions *opt, | |
557 | u8 *proto); | |
558 | ||
559 | extern int ipv6_skip_exthdr(const struct sk_buff *, int start, | |
75f2811c | 560 | u8 *nexthdrp, __be16 *frag_offp); |
1da177e4 LT |
561 | |
562 | extern int ipv6_ext_hdr(u8 nexthdr); | |
563 | ||
c61a4043 MN |
564 | extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type); |
565 | ||
4c9483b2 | 566 | extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6, |
20c59de2 AE |
567 | const struct ipv6_txoptions *opt, |
568 | struct in6_addr *orig); | |
569 | ||
1da177e4 LT |
570 | /* |
571 | * socket options (ipv6_sockglue.c) | |
572 | */ | |
573 | ||
574 | extern int ipv6_setsockopt(struct sock *sk, int level, | |
575 | int optname, | |
576 | char __user *optval, | |
b7058842 | 577 | unsigned int optlen); |
1da177e4 LT |
578 | extern int ipv6_getsockopt(struct sock *sk, int level, |
579 | int optname, | |
580 | char __user *optval, | |
581 | int __user *optlen); | |
3fdadf7d DM |
582 | extern int compat_ipv6_setsockopt(struct sock *sk, |
583 | int level, | |
584 | int optname, | |
585 | char __user *optval, | |
b7058842 | 586 | unsigned int optlen); |
3fdadf7d DM |
587 | extern int compat_ipv6_getsockopt(struct sock *sk, |
588 | int level, | |
589 | int optname, | |
590 | char __user *optval, | |
591 | int __user *optlen); | |
1da177e4 | 592 | |
1da177e4 LT |
593 | extern int ip6_datagram_connect(struct sock *sk, |
594 | struct sockaddr *addr, int addr_len); | |
595 | ||
596 | extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len); | |
4b340ae2 | 597 | extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len); |
e69a4adc | 598 | extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
1da177e4 | 599 | u32 info, u8 *payload); |
4c9483b2 DM |
600 | extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); |
601 | extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); | |
1da177e4 LT |
602 | |
603 | extern int inet6_release(struct socket *sock); | |
604 | extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, | |
605 | int addr_len); | |
606 | extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr, | |
607 | int *uaddr_len, int peer); | |
608 | extern int inet6_ioctl(struct socket *sock, unsigned int cmd, | |
609 | unsigned long arg); | |
610 | ||
d8313f5c ACM |
611 | extern int inet6_hash_connect(struct inet_timewait_death_row *death_row, |
612 | struct sock *sk); | |
613 | ||
1da177e4 LT |
614 | /* |
615 | * reassembly.c | |
616 | */ | |
90ddc4f0 ED |
617 | extern const struct proto_ops inet6_stream_ops; |
618 | extern const struct proto_ops inet6_dgram_ops; | |
20380731 | 619 | |
14c85021 ACM |
620 | struct group_source_req; |
621 | struct group_filter; | |
622 | ||
20380731 ACM |
623 | extern int ip6_mc_source(int add, int omode, struct sock *sk, |
624 | struct group_source_req *pgsr); | |
625 | extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); | |
626 | extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
627 | struct group_filter __user *optval, | |
628 | int __user *optlen); | |
93c8b90f IJ |
629 | extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr, |
630 | const struct in6_addr *daddr, u32 rnd); | |
20380731 ACM |
631 | |
632 | #ifdef CONFIG_PROC_FS | |
6ab57e7e DL |
633 | extern int ac6_proc_init(struct net *net); |
634 | extern void ac6_proc_exit(struct net *net); | |
20380731 ACM |
635 | extern int raw6_proc_init(void); |
636 | extern void raw6_proc_exit(void); | |
6f8b13bc DL |
637 | extern int tcp6_proc_init(struct net *net); |
638 | extern void tcp6_proc_exit(struct net *net); | |
0c96d8c5 DL |
639 | extern int udp6_proc_init(struct net *net); |
640 | extern void udp6_proc_exit(struct net *net); | |
ba4e58ec GR |
641 | extern int udplite6_proc_init(void); |
642 | extern void udplite6_proc_exit(void); | |
20380731 ACM |
643 | extern int ipv6_misc_proc_init(void); |
644 | extern void ipv6_misc_proc_exit(void); | |
7f7d9a6b HX |
645 | extern int snmp6_register_dev(struct inet6_dev *idev); |
646 | extern int snmp6_unregister_dev(struct inet6_dev *idev); | |
20380731 | 647 | |
7f7d9a6b | 648 | #else |
6ab57e7e DL |
649 | static inline int ac6_proc_init(struct net *net) { return 0; } |
650 | static inline void ac6_proc_exit(struct net *net) { } | |
651 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } | |
652 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } | |
20380731 | 653 | #endif |
1da177e4 | 654 | |
20380731 | 655 | #ifdef CONFIG_SYSCTL |
760f2d01 DL |
656 | extern ctl_table ipv6_route_table_template[]; |
657 | extern ctl_table ipv6_icmp_table_template[]; | |
1da177e4 | 658 | |
6de1a910 DL |
659 | extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
660 | extern struct ctl_table *ipv6_route_sysctl_init(struct net *net); | |
291480c0 | 661 | extern int ipv6_sysctl_register(void); |
20380731 ACM |
662 | extern void ipv6_sysctl_unregister(void); |
663 | #endif | |
1da177e4 | 664 | |
20380731 | 665 | #endif /* _NET_IPV6_H */ |