Commit | Line | Data |
---|---|---|
47505b8b | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
60c778b2 | 2 | /* SCTP kernel implementation |
1da177e4 LT |
3 | * (C) Copyright IBM Corp. 2001, 2003 |
4 | * Copyright (c) Cisco 1999,2000 | |
5 | * Copyright (c) Motorola 1999,2000,2001 | |
6 | * Copyright (c) La Monte H.P. Yarroll 2001 | |
7 | * | |
60c778b2 | 8 | * This file is part of the SCTP kernel implementation. |
1da177e4 LT |
9 | * |
10 | * A collection class to handle the storage of transport addresses. | |
11 | * | |
1da177e4 LT |
12 | * Please send any bug reports or fixes you make to the |
13 | * email address(es): | |
91705c61 | 14 | * lksctp developers <linux-sctp@vger.kernel.org> |
1da177e4 | 15 | * |
1da177e4 LT |
16 | * Written or modified by: |
17 | * La Monte H.P. Yarroll <piggy@acm.org> | |
18 | * Karl Knutson <karl@athena.chicago.il.us> | |
19 | * Jon Grimm <jgrimm@us.ibm.com> | |
20 | * Daisy Chang <daisyc@us.ibm.com> | |
1da177e4 LT |
21 | */ |
22 | ||
23 | #include <linux/types.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
1da177e4 LT |
25 | #include <linux/in.h> |
26 | #include <net/sock.h> | |
27 | #include <net/ipv6.h> | |
28 | #include <net/if_inet6.h> | |
29 | #include <net/sctp/sctp.h> | |
30 | #include <net/sctp/sm.h> | |
31 | ||
32 | /* Forward declarations for internal helpers. */ | |
1c662018 XL |
33 | static int sctp_copy_one_addr(struct net *net, struct sctp_bind_addr *dest, |
34 | union sctp_addr *addr, enum sctp_scope scope, | |
35 | gfp_t gfp, int flags); | |
1da177e4 LT |
36 | static void sctp_bind_addr_clean(struct sctp_bind_addr *); |
37 | ||
38 | /* First Level Abstractions. */ | |
39 | ||
40 | /* Copy 'src' to 'dest' taking 'scope' into account. Omit addresses | |
41 | * in 'src' which have a broader scope than 'scope'. | |
42 | */ | |
4db67e80 | 43 | int sctp_bind_addr_copy(struct net *net, struct sctp_bind_addr *dest, |
1da177e4 | 44 | const struct sctp_bind_addr *src, |
1c662018 | 45 | enum sctp_scope scope, gfp_t gfp, |
3182cd84 | 46 | int flags) |
1da177e4 LT |
47 | { |
48 | struct sctp_sockaddr_entry *addr; | |
1da177e4 LT |
49 | int error = 0; |
50 | ||
51 | /* All addresses share the same port. */ | |
52 | dest->port = src->port; | |
53 | ||
54 | /* Extract the addresses which are relevant for this scope. */ | |
9dbc15f0 | 55 | list_for_each_entry(addr, &src->address_list, list) { |
4db67e80 | 56 | error = sctp_copy_one_addr(net, dest, &addr->a, scope, |
1da177e4 LT |
57 | gfp, flags); |
58 | if (error < 0) | |
59 | goto out; | |
60 | } | |
61 | ||
62 | /* If there are no addresses matching the scope and | |
63 | * this is global scope, try to get a link scope address, with | |
64 | * the assumption that we must be sitting behind a NAT. | |
65 | */ | |
66 | if (list_empty(&dest->address_list) && (SCTP_SCOPE_GLOBAL == scope)) { | |
9dbc15f0 | 67 | list_for_each_entry(addr, &src->address_list, list) { |
4db67e80 | 68 | error = sctp_copy_one_addr(net, dest, &addr->a, |
1da177e4 LT |
69 | SCTP_SCOPE_LINK, gfp, |
70 | flags); | |
71 | if (error < 0) | |
72 | goto out; | |
73 | } | |
74 | } | |
75 | ||
458e279f MRL |
76 | /* If somehow no addresses were found that can be used with this |
77 | * scope, it's an error. | |
78 | */ | |
79 | if (list_empty(&dest->address_list)) | |
80 | error = -ENETUNREACH; | |
81 | ||
1da177e4 LT |
82 | out: |
83 | if (error) | |
84 | sctp_bind_addr_clean(dest); | |
85 | ||
86 | return error; | |
87 | } | |
88 | ||
8e71a11c VY |
89 | /* Exactly duplicate the address lists. This is necessary when doing |
90 | * peer-offs and accepts. We don't want to put all the current system | |
91 | * addresses into the endpoint. That's useless. But we do want duplicat | |
92 | * the list of bound addresses that the older endpoint used. | |
93 | */ | |
94 | int sctp_bind_addr_dup(struct sctp_bind_addr *dest, | |
95 | const struct sctp_bind_addr *src, | |
96 | gfp_t gfp) | |
97 | { | |
98 | struct sctp_sockaddr_entry *addr; | |
8e71a11c VY |
99 | int error = 0; |
100 | ||
101 | /* All addresses share the same port. */ | |
102 | dest->port = src->port; | |
103 | ||
9dbc15f0 | 104 | list_for_each_entry(addr, &src->address_list, list) { |
133800d1 MRL |
105 | error = sctp_add_bind_addr(dest, &addr->a, sizeof(addr->a), |
106 | 1, gfp); | |
8e71a11c VY |
107 | if (error < 0) |
108 | break; | |
109 | } | |
110 | ||
111 | return error; | |
112 | } | |
113 | ||
1da177e4 LT |
114 | /* Initialize the SCTP_bind_addr structure for either an endpoint or |
115 | * an association. | |
116 | */ | |
117 | void sctp_bind_addr_init(struct sctp_bind_addr *bp, __u16 port) | |
118 | { | |
1da177e4 LT |
119 | INIT_LIST_HEAD(&bp->address_list); |
120 | bp->port = port; | |
121 | } | |
122 | ||
123 | /* Dispose of the address list. */ | |
124 | static void sctp_bind_addr_clean(struct sctp_bind_addr *bp) | |
125 | { | |
c182f90b | 126 | struct sctp_sockaddr_entry *addr, *temp; |
1da177e4 LT |
127 | |
128 | /* Empty the bind address list. */ | |
c182f90b JL |
129 | list_for_each_entry_safe(addr, temp, &bp->address_list, list) { |
130 | list_del_rcu(&addr->list); | |
5d414521 | 131 | kfree_rcu(addr, rcu); |
1da177e4 LT |
132 | SCTP_DBG_OBJCNT_DEC(addr); |
133 | } | |
134 | } | |
135 | ||
136 | /* Dispose of an SCTP_bind_addr structure */ | |
137 | void sctp_bind_addr_free(struct sctp_bind_addr *bp) | |
138 | { | |
139 | /* Empty the bind address list. */ | |
140 | sctp_bind_addr_clean(bp); | |
1da177e4 LT |
141 | } |
142 | ||
143 | /* Add an address to the bind address list in the SCTP_bind_addr structure. */ | |
144 | int sctp_add_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *new, | |
133800d1 | 145 | int new_size, __u8 addr_state, gfp_t gfp) |
1da177e4 LT |
146 | { |
147 | struct sctp_sockaddr_entry *addr; | |
148 | ||
149 | /* Add the address to the bind address list. */ | |
939cfa75 | 150 | addr = kzalloc(sizeof(*addr), gfp); |
1da177e4 LT |
151 | if (!addr) |
152 | return -ENOMEM; | |
153 | ||
133800d1 | 154 | memcpy(&addr->a, new, min_t(size_t, sizeof(*new), new_size)); |
1da177e4 LT |
155 | |
156 | /* Fix up the port if it has not yet been set. | |
157 | * Both v4 and v6 have the port at the same offset. | |
158 | */ | |
5ab7b859 AV |
159 | if (!addr->a.v4.sin_port) |
160 | addr->a.v4.sin_port = htons(bp->port); | |
1da177e4 | 161 | |
f57d96b2 | 162 | addr->state = addr_state; |
29303547 | 163 | addr->valid = 1; |
dc022a98 | 164 | |
1da177e4 | 165 | INIT_LIST_HEAD(&addr->list); |
559cf710 VY |
166 | |
167 | /* We always hold a socket lock when calling this function, | |
168 | * and that acts as a writer synchronizing lock. | |
169 | */ | |
170 | list_add_tail_rcu(&addr->list, &bp->address_list); | |
1da177e4 LT |
171 | SCTP_DBG_OBJCNT_INC(addr); |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | /* Delete an address from the bind address list in the SCTP_bind_addr | |
177 | * structure. | |
178 | */ | |
0ed90fb0 | 179 | int sctp_del_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *del_addr) |
1da177e4 | 180 | { |
559cf710 | 181 | struct sctp_sockaddr_entry *addr, *temp; |
22626216 | 182 | int found = 0; |
1da177e4 | 183 | |
559cf710 VY |
184 | /* We hold the socket lock when calling this function, |
185 | * and that acts as a writer synchronizing lock. | |
186 | */ | |
187 | list_for_each_entry_safe(addr, temp, &bp->address_list, list) { | |
c9a08505 | 188 | if (sctp_cmp_addr_exact(&addr->a, del_addr)) { |
1da177e4 | 189 | /* Found the exact match. */ |
22626216 | 190 | found = 1; |
559cf710 VY |
191 | addr->valid = 0; |
192 | list_del_rcu(&addr->list); | |
193 | break; | |
1da177e4 LT |
194 | } |
195 | } | |
196 | ||
22626216 | 197 | if (found) { |
1231f0ba | 198 | kfree_rcu(addr, rcu); |
559cf710 | 199 | SCTP_DBG_OBJCNT_DEC(addr); |
0ed90fb0 | 200 | return 0; |
559cf710 VY |
201 | } |
202 | ||
1da177e4 LT |
203 | return -EINVAL; |
204 | } | |
205 | ||
206 | /* Create a network byte-order representation of all the addresses | |
207 | * formated as SCTP parameters. | |
208 | * | |
209 | * The second argument is the return value for the length. | |
210 | */ | |
211 | union sctp_params sctp_bind_addrs_to_raw(const struct sctp_bind_addr *bp, | |
3182cd84 | 212 | int *addrs_len, |
dd0fc66f | 213 | gfp_t gfp) |
1da177e4 LT |
214 | { |
215 | union sctp_params addrparms; | |
216 | union sctp_params retval; | |
217 | int addrparms_len; | |
218 | union sctp_addr_param rawaddr; | |
219 | int len; | |
220 | struct sctp_sockaddr_entry *addr; | |
221 | struct list_head *pos; | |
222 | struct sctp_af *af; | |
223 | ||
224 | addrparms_len = 0; | |
225 | len = 0; | |
226 | ||
227 | /* Allocate enough memory at once. */ | |
228 | list_for_each(pos, &bp->address_list) { | |
229 | len += sizeof(union sctp_addr_param); | |
230 | } | |
231 | ||
232 | /* Don't even bother embedding an address if there | |
233 | * is only one. | |
234 | */ | |
235 | if (len == sizeof(union sctp_addr_param)) { | |
236 | retval.v = NULL; | |
237 | goto end_raw; | |
238 | } | |
239 | ||
240 | retval.v = kmalloc(len, gfp); | |
241 | if (!retval.v) | |
242 | goto end_raw; | |
243 | ||
244 | addrparms = retval; | |
245 | ||
9dbc15f0 | 246 | list_for_each_entry(addr, &bp->address_list, list) { |
6244be4e AV |
247 | af = sctp_get_af_specific(addr->a.v4.sin_family); |
248 | len = af->to_addr_param(&addr->a, &rawaddr); | |
1da177e4 LT |
249 | memcpy(addrparms.v, &rawaddr, len); |
250 | addrparms.v += len; | |
251 | addrparms_len += len; | |
252 | } | |
253 | ||
254 | end_raw: | |
255 | *addrs_len = addrparms_len; | |
256 | return retval; | |
257 | } | |
258 | ||
259 | /* | |
260 | * Create an address list out of the raw address list format (IPv4 and IPv6 | |
261 | * address parameters). | |
262 | */ | |
263 | int sctp_raw_to_bind_addrs(struct sctp_bind_addr *bp, __u8 *raw_addr_list, | |
dd0fc66f | 264 | int addrs_len, __u16 port, gfp_t gfp) |
1da177e4 LT |
265 | { |
266 | union sctp_addr_param *rawaddr; | |
267 | struct sctp_paramhdr *param; | |
268 | union sctp_addr addr; | |
269 | int retval = 0; | |
270 | int len; | |
271 | struct sctp_af *af; | |
272 | ||
273 | /* Convert the raw address to standard address format */ | |
274 | while (addrs_len) { | |
275 | param = (struct sctp_paramhdr *)raw_addr_list; | |
276 | rawaddr = (union sctp_addr_param *)raw_addr_list; | |
277 | ||
278 | af = sctp_get_af_specific(param_type2af(param->type)); | |
0c5dc070 MRL |
279 | if (unlikely(!af) || |
280 | !af->from_addr_param(&addr, rawaddr, htons(port), 0)) { | |
1da177e4 | 281 | retval = -EINVAL; |
0c5dc070 | 282 | goto out_err; |
1da177e4 LT |
283 | } |
284 | ||
b8607805 XL |
285 | if (sctp_bind_addr_state(bp, &addr) != -1) |
286 | goto next; | |
133800d1 MRL |
287 | retval = sctp_add_bind_addr(bp, &addr, sizeof(addr), |
288 | SCTP_ADDR_SRC, gfp); | |
0c5dc070 | 289 | if (retval) |
1da177e4 | 290 | /* Can't finish building the list, clean up. */ |
0c5dc070 | 291 | goto out_err; |
1da177e4 | 292 | |
b8607805 | 293 | next: |
1da177e4 LT |
294 | len = ntohs(param->length); |
295 | addrs_len -= len; | |
296 | raw_addr_list += len; | |
297 | } | |
298 | ||
299 | return retval; | |
0c5dc070 MRL |
300 | |
301 | out_err: | |
302 | if (retval) | |
303 | sctp_bind_addr_clean(bp); | |
304 | ||
305 | return retval; | |
1da177e4 LT |
306 | } |
307 | ||
308 | /******************************************************************** | |
309 | * 2nd Level Abstractions | |
310 | ********************************************************************/ | |
311 | ||
312 | /* Does this contain a specified address? Allow wildcarding. */ | |
d808ad9a | 313 | int sctp_bind_addr_match(struct sctp_bind_addr *bp, |
1da177e4 LT |
314 | const union sctp_addr *addr, |
315 | struct sctp_sock *opt) | |
316 | { | |
317 | struct sctp_sockaddr_entry *laddr; | |
559cf710 VY |
318 | int match = 0; |
319 | ||
320 | rcu_read_lock(); | |
321 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
322 | if (!laddr->valid) | |
323 | continue; | |
324 | if (opt->pf->cmp_addr(&laddr->a, addr, opt)) { | |
325 | match = 1; | |
326 | break; | |
327 | } | |
1da177e4 | 328 | } |
559cf710 | 329 | rcu_read_unlock(); |
1da177e4 | 330 | |
559cf710 | 331 | return match; |
1da177e4 LT |
332 | } |
333 | ||
76c6d988 XL |
334 | int sctp_bind_addrs_check(struct sctp_sock *sp, |
335 | struct sctp_sock *sp2, int cnt2) | |
336 | { | |
337 | struct sctp_bind_addr *bp2 = &sp2->ep->base.bind_addr; | |
338 | struct sctp_bind_addr *bp = &sp->ep->base.bind_addr; | |
339 | struct sctp_sockaddr_entry *laddr, *laddr2; | |
340 | bool exist = false; | |
341 | int cnt = 0; | |
342 | ||
343 | rcu_read_lock(); | |
344 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
345 | list_for_each_entry_rcu(laddr2, &bp2->address_list, list) { | |
346 | if (sp->pf->af->cmp_addr(&laddr->a, &laddr2->a) && | |
347 | laddr->valid && laddr2->valid) { | |
348 | exist = true; | |
349 | goto next; | |
350 | } | |
351 | } | |
352 | cnt = 0; | |
353 | break; | |
354 | next: | |
355 | cnt++; | |
356 | } | |
357 | rcu_read_unlock(); | |
358 | ||
359 | return (cnt == cnt2) ? 0 : (exist ? -EEXIST : 1); | |
360 | } | |
361 | ||
7dab83de VY |
362 | /* Does the address 'addr' conflict with any addresses in |
363 | * the bp. | |
364 | */ | |
365 | int sctp_bind_addr_conflict(struct sctp_bind_addr *bp, | |
366 | const union sctp_addr *addr, | |
367 | struct sctp_sock *bp_sp, | |
368 | struct sctp_sock *addr_sp) | |
369 | { | |
370 | struct sctp_sockaddr_entry *laddr; | |
371 | int conflict = 0; | |
372 | struct sctp_sock *sp; | |
373 | ||
374 | /* Pick the IPv6 socket as the basis of comparison | |
375 | * since it's usually a superset of the IPv4. | |
376 | * If there is no IPv6 socket, then default to bind_addr. | |
377 | */ | |
378 | if (sctp_opt2sk(bp_sp)->sk_family == AF_INET6) | |
379 | sp = bp_sp; | |
380 | else if (sctp_opt2sk(addr_sp)->sk_family == AF_INET6) | |
381 | sp = addr_sp; | |
382 | else | |
383 | sp = bp_sp; | |
384 | ||
385 | rcu_read_lock(); | |
386 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
387 | if (!laddr->valid) | |
388 | continue; | |
389 | ||
390 | conflict = sp->pf->cmp_addr(&laddr->a, addr, sp); | |
391 | if (conflict) | |
392 | break; | |
393 | } | |
394 | rcu_read_unlock(); | |
395 | ||
396 | return conflict; | |
397 | } | |
398 | ||
75205f47 VY |
399 | /* Get the state of the entry in the bind_addr_list */ |
400 | int sctp_bind_addr_state(const struct sctp_bind_addr *bp, | |
401 | const union sctp_addr *addr) | |
402 | { | |
403 | struct sctp_sockaddr_entry *laddr; | |
404 | struct sctp_af *af; | |
75205f47 VY |
405 | |
406 | af = sctp_get_af_specific(addr->sa.sa_family); | |
407 | if (unlikely(!af)) | |
3cab2afb | 408 | return -1; |
75205f47 | 409 | |
75205f47 VY |
410 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { |
411 | if (!laddr->valid) | |
412 | continue; | |
3cab2afb XL |
413 | if (af->cmp_addr(&laddr->a, addr)) |
414 | return laddr->state; | |
75205f47 | 415 | } |
75205f47 | 416 | |
3cab2afb | 417 | return -1; |
75205f47 VY |
418 | } |
419 | ||
1da177e4 LT |
420 | /* Find the first address in the bind address list that is not present in |
421 | * the addrs packed array. | |
422 | */ | |
423 | union sctp_addr *sctp_find_unmatch_addr(struct sctp_bind_addr *bp, | |
424 | const union sctp_addr *addrs, | |
425 | int addrcnt, | |
426 | struct sctp_sock *opt) | |
427 | { | |
428 | struct sctp_sockaddr_entry *laddr; | |
429 | union sctp_addr *addr; | |
430 | void *addr_buf; | |
431 | struct sctp_af *af; | |
1da177e4 LT |
432 | int i; |
433 | ||
559cf710 VY |
434 | /* This is only called sctp_send_asconf_del_ip() and we hold |
435 | * the socket lock in that code patch, so that address list | |
436 | * can't change. | |
437 | */ | |
438 | list_for_each_entry(laddr, &bp->address_list, list) { | |
1da177e4 LT |
439 | addr_buf = (union sctp_addr *)addrs; |
440 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 441 | addr = addr_buf; |
1da177e4 | 442 | af = sctp_get_af_specific(addr->v4.sin_family); |
d808ad9a | 443 | if (!af) |
559cf710 | 444 | break; |
1da177e4 | 445 | |
5f242a13 | 446 | if (opt->pf->cmp_addr(&laddr->a, addr, opt)) |
1da177e4 LT |
447 | break; |
448 | ||
449 | addr_buf += af->sockaddr_len; | |
450 | } | |
451 | if (i == addrcnt) | |
5ae955cf | 452 | return &laddr->a; |
1da177e4 LT |
453 | } |
454 | ||
455 | return NULL; | |
456 | } | |
457 | ||
458 | /* Copy out addresses from the global local address list. */ | |
4db67e80 | 459 | static int sctp_copy_one_addr(struct net *net, struct sctp_bind_addr *dest, |
1c662018 XL |
460 | union sctp_addr *addr, enum sctp_scope scope, |
461 | gfp_t gfp, int flags) | |
1da177e4 LT |
462 | { |
463 | int error = 0; | |
464 | ||
52cae8f0 | 465 | if (sctp_is_any(NULL, addr)) { |
4db67e80 | 466 | error = sctp_copy_local_addr_list(net, dest, scope, gfp, flags); |
e7ff4a70 | 467 | } else if (sctp_in_scope(net, addr, scope)) { |
1da177e4 LT |
468 | /* Now that the address is in scope, check to see if |
469 | * the address type is supported by local sock as | |
470 | * well as the remote peer. | |
471 | */ | |
472 | if ((((AF_INET == addr->sa.sa_family) && | |
471e39df | 473 | (flags & SCTP_ADDR4_ALLOWED) && |
1da177e4 LT |
474 | (flags & SCTP_ADDR4_PEERSUPP))) || |
475 | (((AF_INET6 == addr->sa.sa_family) && | |
476 | (flags & SCTP_ADDR6_ALLOWED) && | |
477 | (flags & SCTP_ADDR6_PEERSUPP)))) | |
133800d1 MRL |
478 | error = sctp_add_bind_addr(dest, addr, sizeof(*addr), |
479 | SCTP_ADDR_SRC, gfp); | |
1da177e4 LT |
480 | } |
481 | ||
482 | return error; | |
483 | } | |
484 | ||
485 | /* Is this a wildcard address? */ | |
52cae8f0 | 486 | int sctp_is_any(struct sock *sk, const union sctp_addr *addr) |
1da177e4 | 487 | { |
52cae8f0 VY |
488 | unsigned short fam = 0; |
489 | struct sctp_af *af; | |
490 | ||
491 | /* Try to get the right address family */ | |
492 | if (addr->sa.sa_family != AF_UNSPEC) | |
493 | fam = addr->sa.sa_family; | |
494 | else if (sk) | |
495 | fam = sk->sk_family; | |
496 | ||
497 | af = sctp_get_af_specific(fam); | |
1da177e4 LT |
498 | if (!af) |
499 | return 0; | |
52cae8f0 | 500 | |
1da177e4 LT |
501 | return af->is_any(addr); |
502 | } | |
503 | ||
504 | /* Is 'addr' valid for 'scope'? */ | |
1c662018 XL |
505 | int sctp_in_scope(struct net *net, const union sctp_addr *addr, |
506 | enum sctp_scope scope) | |
1da177e4 | 507 | { |
1c662018 | 508 | enum sctp_scope addr_scope = sctp_scope(addr); |
1da177e4 LT |
509 | |
510 | /* The unusable SCTP addresses will not be considered with | |
511 | * any defined scopes. | |
512 | */ | |
513 | if (SCTP_SCOPE_UNUSABLE == addr_scope) | |
514 | return 0; | |
515 | /* | |
516 | * For INIT and INIT-ACK address list, let L be the level of | |
440d3990 | 517 | * requested destination address, sender and receiver |
1da177e4 LT |
518 | * SHOULD include all of its addresses with level greater |
519 | * than or equal to L. | |
72388433 BD |
520 | * |
521 | * Address scoping can be selectively controlled via sysctl | |
522 | * option | |
1da177e4 | 523 | */ |
e1fc3b14 | 524 | switch (net->sctp.scope_policy) { |
72388433 | 525 | case SCTP_SCOPE_POLICY_DISABLE: |
1da177e4 | 526 | return 1; |
72388433 BD |
527 | case SCTP_SCOPE_POLICY_ENABLE: |
528 | if (addr_scope <= scope) | |
529 | return 1; | |
530 | break; | |
531 | case SCTP_SCOPE_POLICY_PRIVATE: | |
532 | if (addr_scope <= scope || SCTP_SCOPE_PRIVATE == addr_scope) | |
533 | return 1; | |
534 | break; | |
535 | case SCTP_SCOPE_POLICY_LINK: | |
536 | if (addr_scope <= scope || SCTP_SCOPE_LINK == addr_scope) | |
537 | return 1; | |
538 | break; | |
539 | default: | |
540 | break; | |
541 | } | |
1da177e4 LT |
542 | |
543 | return 0; | |
544 | } | |
545 | ||
9f7d653b MH |
546 | int sctp_is_ep_boundall(struct sock *sk) |
547 | { | |
548 | struct sctp_bind_addr *bp; | |
549 | struct sctp_sockaddr_entry *addr; | |
550 | ||
551 | bp = &sctp_sk(sk)->ep->base.bind_addr; | |
552 | if (sctp_list_single_entry(&bp->address_list)) { | |
553 | addr = list_entry(bp->address_list.next, | |
554 | struct sctp_sockaddr_entry, list); | |
555 | if (sctp_is_any(sk, &addr->a)) | |
556 | return 1; | |
557 | } | |
558 | return 0; | |
559 | } | |
560 | ||
1da177e4 LT |
561 | /******************************************************************** |
562 | * 3rd Level Abstractions | |
563 | ********************************************************************/ | |
564 | ||
565 | /* What is the scope of 'addr'? */ | |
1c662018 | 566 | enum sctp_scope sctp_scope(const union sctp_addr *addr) |
1da177e4 LT |
567 | { |
568 | struct sctp_af *af; | |
569 | ||
570 | af = sctp_get_af_specific(addr->sa.sa_family); | |
571 | if (!af) | |
572 | return SCTP_SCOPE_UNUSABLE; | |
573 | ||
574 | return af->scope((union sctp_addr *)addr); | |
575 | } |