1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38#include <linux/types.h>
39#include <linux/slab.h>
40#include <linux/in.h>
41#include <net/sock.h>
42#include <net/ipv6.h>
43#include <net/if_inet6.h>
44#include <net/sctp/sctp.h>
45#include <net/sctp/sm.h>
46
47
48static int sctp_copy_one_addr(struct net *, struct sctp_bind_addr *,
49 union sctp_addr *, sctp_scope_t scope, gfp_t gfp,
50 int flags);
51static void sctp_bind_addr_clean(struct sctp_bind_addr *);
52
53
54
55
56
57
58int sctp_bind_addr_copy(struct net *net, struct sctp_bind_addr *dest,
59 const struct sctp_bind_addr *src,
60 sctp_scope_t scope, gfp_t gfp,
61 int flags)
62{
63 struct sctp_sockaddr_entry *addr;
64 int error = 0;
65
66
67 dest->port = src->port;
68
69
70 list_for_each_entry(addr, &src->address_list, list) {
71 error = sctp_copy_one_addr(net, dest, &addr->a, scope,
72 gfp, flags);
73 if (error < 0)
74 goto out;
75 }
76
77
78
79
80
81 if (list_empty(&dest->address_list) && (SCTP_SCOPE_GLOBAL == scope)) {
82 list_for_each_entry(addr, &src->address_list, list) {
83 error = sctp_copy_one_addr(net, dest, &addr->a,
84 SCTP_SCOPE_LINK, gfp,
85 flags);
86 if (error < 0)
87 goto out;
88 }
89 }
90
91out:
92 if (error)
93 sctp_bind_addr_clean(dest);
94
95 return error;
96}
97
98
99
100
101
102
103int sctp_bind_addr_dup(struct sctp_bind_addr *dest,
104 const struct sctp_bind_addr *src,
105 gfp_t gfp)
106{
107 struct sctp_sockaddr_entry *addr;
108 int error = 0;
109
110
111 dest->port = src->port;
112
113 list_for_each_entry(addr, &src->address_list, list) {
114 error = sctp_add_bind_addr(dest, &addr->a, 1, gfp);
115 if (error < 0)
116 break;
117 }
118
119 return error;
120}
121
122
123
124
125void sctp_bind_addr_init(struct sctp_bind_addr *bp, __u16 port)
126{
127 INIT_LIST_HEAD(&bp->address_list);
128 bp->port = port;
129}
130
131
132static void sctp_bind_addr_clean(struct sctp_bind_addr *bp)
133{
134 struct sctp_sockaddr_entry *addr, *temp;
135
136
137 list_for_each_entry_safe(addr, temp, &bp->address_list, list) {
138 list_del_rcu(&addr->list);
139 kfree_rcu(addr, rcu);
140 SCTP_DBG_OBJCNT_DEC(addr);
141 }
142}
143
144
145void sctp_bind_addr_free(struct sctp_bind_addr *bp)
146{
147
148 sctp_bind_addr_clean(bp);
149}
150
151
152int sctp_add_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *new,
153 __u8 addr_state, gfp_t gfp)
154{
155 struct sctp_sockaddr_entry *addr;
156
157
158 addr = kzalloc(sizeof(*addr), gfp);
159 if (!addr)
160 return -ENOMEM;
161
162 memcpy(&addr->a, new, sizeof(*new));
163
164
165
166
167 if (!addr->a.v4.sin_port)
168 addr->a.v4.sin_port = htons(bp->port);
169
170 addr->state = addr_state;
171 addr->valid = 1;
172
173 INIT_LIST_HEAD(&addr->list);
174
175
176
177
178 list_add_tail_rcu(&addr->list, &bp->address_list);
179 SCTP_DBG_OBJCNT_INC(addr);
180
181 return 0;
182}
183
184
185
186
187int sctp_del_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *del_addr)
188{
189 struct sctp_sockaddr_entry *addr, *temp;
190 int found = 0;
191
192
193
194
195 list_for_each_entry_safe(addr, temp, &bp->address_list, list) {
196 if (sctp_cmp_addr_exact(&addr->a, del_addr)) {
197
198 found = 1;
199 addr->valid = 0;
200 list_del_rcu(&addr->list);
201 break;
202 }
203 }
204
205 if (found) {
206 kfree_rcu(addr, rcu);
207 SCTP_DBG_OBJCNT_DEC(addr);
208 return 0;
209 }
210
211 return -EINVAL;
212}
213
214
215
216
217
218
219union sctp_params sctp_bind_addrs_to_raw(const struct sctp_bind_addr *bp,
220 int *addrs_len,
221 gfp_t gfp)
222{
223 union sctp_params addrparms;
224 union sctp_params retval;
225 int addrparms_len;
226 union sctp_addr_param rawaddr;
227 int len;
228 struct sctp_sockaddr_entry *addr;
229 struct list_head *pos;
230 struct sctp_af *af;
231
232 addrparms_len = 0;
233 len = 0;
234
235
236 list_for_each(pos, &bp->address_list) {
237 len += sizeof(union sctp_addr_param);
238 }
239
240
241
242
243 if (len == sizeof(union sctp_addr_param)) {
244 retval.v = NULL;
245 goto end_raw;
246 }
247
248 retval.v = kmalloc(len, gfp);
249 if (!retval.v)
250 goto end_raw;
251
252 addrparms = retval;
253
254 list_for_each_entry(addr, &bp->address_list, list) {
255 af = sctp_get_af_specific(addr->a.v4.sin_family);
256 len = af->to_addr_param(&addr->a, &rawaddr);
257 memcpy(addrparms.v, &rawaddr, len);
258 addrparms.v += len;
259 addrparms_len += len;
260 }
261
262end_raw:
263 *addrs_len = addrparms_len;
264 return retval;
265}
266
267
268
269
270
271int sctp_raw_to_bind_addrs(struct sctp_bind_addr *bp, __u8 *raw_addr_list,
272 int addrs_len, __u16 port, gfp_t gfp)
273{
274 union sctp_addr_param *rawaddr;
275 struct sctp_paramhdr *param;
276 union sctp_addr addr;
277 int retval = 0;
278 int len;
279 struct sctp_af *af;
280
281
282 while (addrs_len) {
283 param = (struct sctp_paramhdr *)raw_addr_list;
284 rawaddr = (union sctp_addr_param *)raw_addr_list;
285
286 af = sctp_get_af_specific(param_type2af(param->type));
287 if (unlikely(!af)) {
288 retval = -EINVAL;
289 sctp_bind_addr_clean(bp);
290 break;
291 }
292
293 af->from_addr_param(&addr, rawaddr, htons(port), 0);
294 retval = sctp_add_bind_addr(bp, &addr, SCTP_ADDR_SRC, gfp);
295 if (retval) {
296
297 sctp_bind_addr_clean(bp);
298 break;
299 }
300
301 len = ntohs(param->length);
302 addrs_len -= len;
303 raw_addr_list += len;
304 }
305
306 return retval;
307}
308
309
310
311
312
313
314int sctp_bind_addr_match(struct sctp_bind_addr *bp,
315 const union sctp_addr *addr,
316 struct sctp_sock *opt)
317{
318 struct sctp_sockaddr_entry *laddr;
319 int match = 0;
320
321 rcu_read_lock();
322 list_for_each_entry_rcu(laddr, &bp->address_list, list) {
323 if (!laddr->valid)
324 continue;
325 if (opt->pf->cmp_addr(&laddr->a, addr, opt)) {
326 match = 1;
327 break;
328 }
329 }
330 rcu_read_unlock();
331
332 return match;
333}
334
335
336
337
338int sctp_bind_addr_conflict(struct sctp_bind_addr *bp,
339 const union sctp_addr *addr,
340 struct sctp_sock *bp_sp,
341 struct sctp_sock *addr_sp)
342{
343 struct sctp_sockaddr_entry *laddr;
344 int conflict = 0;
345 struct sctp_sock *sp;
346
347
348
349
350
351 if (sctp_opt2sk(bp_sp)->sk_family == AF_INET6)
352 sp = bp_sp;
353 else if (sctp_opt2sk(addr_sp)->sk_family == AF_INET6)
354 sp = addr_sp;
355 else
356 sp = bp_sp;
357
358 rcu_read_lock();
359 list_for_each_entry_rcu(laddr, &bp->address_list, list) {
360 if (!laddr->valid)
361 continue;
362
363 conflict = sp->pf->cmp_addr(&laddr->a, addr, sp);
364 if (conflict)
365 break;
366 }
367 rcu_read_unlock();
368
369 return conflict;
370}
371
372
373int sctp_bind_addr_state(const struct sctp_bind_addr *bp,
374 const union sctp_addr *addr)
375{
376 struct sctp_sockaddr_entry *laddr;
377 struct sctp_af *af;
378 int state = -1;
379
380 af = sctp_get_af_specific(addr->sa.sa_family);
381 if (unlikely(!af))
382 return state;
383
384 rcu_read_lock();
385 list_for_each_entry_rcu(laddr, &bp->address_list, list) {
386 if (!laddr->valid)
387 continue;
388 if (af->cmp_addr(&laddr->a, addr)) {
389 state = laddr->state;
390 break;
391 }
392 }
393 rcu_read_unlock();
394
395 return state;
396}
397
398
399
400
401union sctp_addr *sctp_find_unmatch_addr(struct sctp_bind_addr *bp,
402 const union sctp_addr *addrs,
403 int addrcnt,
404 struct sctp_sock *opt)
405{
406 struct sctp_sockaddr_entry *laddr;
407 union sctp_addr *addr;
408 void *addr_buf;
409 struct sctp_af *af;
410 int i;
411
412
413
414
415
416 list_for_each_entry(laddr, &bp->address_list, list) {
417 addr_buf = (union sctp_addr *)addrs;
418 for (i = 0; i < addrcnt; i++) {
419 addr = addr_buf;
420 af = sctp_get_af_specific(addr->v4.sin_family);
421 if (!af)
422 break;
423
424 if (opt->pf->cmp_addr(&laddr->a, addr, opt))
425 break;
426
427 addr_buf += af->sockaddr_len;
428 }
429 if (i == addrcnt)
430 return &laddr->a;
431 }
432
433 return NULL;
434}
435
436
437static int sctp_copy_one_addr(struct net *net, struct sctp_bind_addr *dest,
438 union sctp_addr *addr,
439 sctp_scope_t scope, gfp_t gfp,
440 int flags)
441{
442 int error = 0;
443
444 if (sctp_is_any(NULL, addr)) {
445 error = sctp_copy_local_addr_list(net, dest, scope, gfp, flags);
446 } else if (sctp_in_scope(net, addr, scope)) {
447
448
449
450
451 if ((((AF_INET == addr->sa.sa_family) &&
452 (flags & SCTP_ADDR4_PEERSUPP))) ||
453 (((AF_INET6 == addr->sa.sa_family) &&
454 (flags & SCTP_ADDR6_ALLOWED) &&
455 (flags & SCTP_ADDR6_PEERSUPP))))
456 error = sctp_add_bind_addr(dest, addr, SCTP_ADDR_SRC,
457 gfp);
458 }
459
460 return error;
461}
462
463
464int sctp_is_any(struct sock *sk, const union sctp_addr *addr)
465{
466 unsigned short fam = 0;
467 struct sctp_af *af;
468
469
470 if (addr->sa.sa_family != AF_UNSPEC)
471 fam = addr->sa.sa_family;
472 else if (sk)
473 fam = sk->sk_family;
474
475 af = sctp_get_af_specific(fam);
476 if (!af)
477 return 0;
478
479 return af->is_any(addr);
480}
481
482
483int sctp_in_scope(struct net *net, const union sctp_addr *addr, sctp_scope_t scope)
484{
485 sctp_scope_t addr_scope = sctp_scope(addr);
486
487
488
489
490 if (SCTP_SCOPE_UNUSABLE == addr_scope)
491 return 0;
492
493
494
495
496
497
498
499
500
501 switch (net->sctp.scope_policy) {
502 case SCTP_SCOPE_POLICY_DISABLE:
503 return 1;
504 case SCTP_SCOPE_POLICY_ENABLE:
505 if (addr_scope <= scope)
506 return 1;
507 break;
508 case SCTP_SCOPE_POLICY_PRIVATE:
509 if (addr_scope <= scope || SCTP_SCOPE_PRIVATE == addr_scope)
510 return 1;
511 break;
512 case SCTP_SCOPE_POLICY_LINK:
513 if (addr_scope <= scope || SCTP_SCOPE_LINK == addr_scope)
514 return 1;
515 break;
516 default:
517 break;
518 }
519
520 return 0;
521}
522
523int sctp_is_ep_boundall(struct sock *sk)
524{
525 struct sctp_bind_addr *bp;
526 struct sctp_sockaddr_entry *addr;
527
528 bp = &sctp_sk(sk)->ep->base.bind_addr;
529 if (sctp_list_single_entry(&bp->address_list)) {
530 addr = list_entry(bp->address_list.next,
531 struct sctp_sockaddr_entry, list);
532 if (sctp_is_any(sk, &addr->a))
533 return 1;
534 }
535 return 0;
536}
537
538
539
540
541
542
543sctp_scope_t sctp_scope(const union sctp_addr *addr)
544{
545 struct sctp_af *af;
546
547 af = sctp_get_af_specific(addr->sa.sa_family);
548 if (!af)
549 return SCTP_SCOPE_UNUSABLE;
550
551 return af->scope((union sctp_addr *)addr);
552}
553