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60c778b2 | 1 | /* SCTP kernel implementation |
1da177e4 LT |
2 | * (C) Copyright IBM Corp. 2001, 2004 |
3 | * Copyright (c) 1999-2000 Cisco, Inc. | |
4 | * Copyright (c) 1999-2001 Motorola, Inc. | |
5 | * Copyright (c) 2001 Intel Corp. | |
6 | * Copyright (c) 2001 Nokia, Inc. | |
7 | * Copyright (c) 2001 La Monte H.P. Yarroll | |
8 | * | |
9 | * These functions manipulate an sctp event. The struct ulpevent is used | |
10 | * to carry notifications and data to the ULP (sockets). | |
60c778b2 VY |
11 | * |
12 | * This SCTP implementation is free software; | |
1da177e4 LT |
13 | * you can redistribute it and/or modify it under the terms of |
14 | * the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2, or (at your option) | |
16 | * any later version. | |
17 | * | |
60c778b2 | 18 | * This SCTP implementation is distributed in the hope that it |
1da177e4 LT |
19 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
20 | * ************************ | |
21 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
22 | * See the GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with GNU CC; see the file COPYING. If not, write to | |
26 | * the Free Software Foundation, 59 Temple Place - Suite 330, | |
27 | * Boston, MA 02111-1307, USA. | |
28 | * | |
29 | * Please send any bug reports or fixes you make to the | |
30 | * email address(es): | |
31 | * lksctp developers <lksctp-developers@lists.sourceforge.net> | |
32 | * | |
33 | * Or submit a bug report through the following website: | |
34 | * http://www.sf.net/projects/lksctp | |
35 | * | |
36 | * Written or modified by: | |
37 | * Jon Grimm <jgrimm@us.ibm.com> | |
38 | * La Monte H.P. Yarroll <piggy@acm.org> | |
39 | * Ardelle Fan <ardelle.fan@intel.com> | |
40 | * Sridhar Samudrala <sri@us.ibm.com> | |
41 | * | |
42 | * Any bugs reported given to us we will try to fix... any fixes shared will | |
43 | * be incorporated into the next SCTP release. | |
44 | */ | |
45 | ||
46 | #include <linux/types.h> | |
47 | #include <linux/skbuff.h> | |
48 | #include <net/sctp/structs.h> | |
49 | #include <net/sctp/sctp.h> | |
50 | #include <net/sctp/sm.h> | |
51 | ||
52 | static void sctp_ulpevent_receive_data(struct sctp_ulpevent *event, | |
53 | struct sctp_association *asoc); | |
54 | static void sctp_ulpevent_release_data(struct sctp_ulpevent *event); | |
d7c2c9e3 TF |
55 | static void sctp_ulpevent_release_frag_data(struct sctp_ulpevent *event); |
56 | ||
1da177e4 | 57 | |
1da177e4 | 58 | /* Initialize an ULP event from an given skb. */ |
331c4ee7 VY |
59 | SCTP_STATIC void sctp_ulpevent_init(struct sctp_ulpevent *event, |
60 | int msg_flags, | |
61 | unsigned int len) | |
1da177e4 LT |
62 | { |
63 | memset(event, 0, sizeof(struct sctp_ulpevent)); | |
64 | event->msg_flags = msg_flags; | |
331c4ee7 | 65 | event->rmem_len = len; |
1da177e4 LT |
66 | } |
67 | ||
68 | /* Create a new sctp_ulpevent. */ | |
69 | SCTP_STATIC struct sctp_ulpevent *sctp_ulpevent_new(int size, int msg_flags, | |
dd0fc66f | 70 | gfp_t gfp) |
1da177e4 LT |
71 | { |
72 | struct sctp_ulpevent *event; | |
73 | struct sk_buff *skb; | |
74 | ||
75 | skb = alloc_skb(size, gfp); | |
76 | if (!skb) | |
77 | goto fail; | |
78 | ||
79 | event = sctp_skb2event(skb); | |
331c4ee7 | 80 | sctp_ulpevent_init(event, msg_flags, skb->truesize); |
1da177e4 LT |
81 | |
82 | return event; | |
83 | ||
84 | fail: | |
85 | return NULL; | |
86 | } | |
87 | ||
88 | /* Is this a MSG_NOTIFICATION? */ | |
89 | int sctp_ulpevent_is_notification(const struct sctp_ulpevent *event) | |
90 | { | |
91 | return MSG_NOTIFICATION == (event->msg_flags & MSG_NOTIFICATION); | |
92 | } | |
93 | ||
94 | /* Hold the association in case the msg_name needs read out of | |
95 | * the association. | |
96 | */ | |
97 | static inline void sctp_ulpevent_set_owner(struct sctp_ulpevent *event, | |
98 | const struct sctp_association *asoc) | |
99 | { | |
100 | struct sk_buff *skb; | |
101 | ||
102 | /* Cast away the const, as we are just wanting to | |
103 | * bump the reference count. | |
104 | */ | |
105 | sctp_association_hold((struct sctp_association *)asoc); | |
106 | skb = sctp_event2skb(event); | |
1da177e4 | 107 | event->asoc = (struct sctp_association *)asoc; |
331c4ee7 VY |
108 | atomic_add(event->rmem_len, &event->asoc->rmem_alloc); |
109 | sctp_skb_set_owner_r(skb, asoc->base.sk); | |
1da177e4 LT |
110 | } |
111 | ||
112 | /* A simple destructor to give up the reference to the association. */ | |
113 | static inline void sctp_ulpevent_release_owner(struct sctp_ulpevent *event) | |
114 | { | |
049b3ff5 | 115 | struct sctp_association *asoc = event->asoc; |
049b3ff5 | 116 | |
331c4ee7 | 117 | atomic_sub(event->rmem_len, &asoc->rmem_alloc); |
049b3ff5 | 118 | sctp_association_put(asoc); |
1da177e4 LT |
119 | } |
120 | ||
121 | /* Create and initialize an SCTP_ASSOC_CHANGE event. | |
122 | * | |
123 | * 5.3.1.1 SCTP_ASSOC_CHANGE | |
124 | * | |
125 | * Communication notifications inform the ULP that an SCTP association | |
126 | * has either begun or ended. The identifier for a new association is | |
127 | * provided by this notification. | |
128 | * | |
129 | * Note: There is no field checking here. If a field is unused it will be | |
130 | * zero'd out. | |
131 | */ | |
132 | struct sctp_ulpevent *sctp_ulpevent_make_assoc_change( | |
133 | const struct sctp_association *asoc, | |
134 | __u16 flags, __u16 state, __u16 error, __u16 outbound, | |
a5a35e76 | 135 | __u16 inbound, struct sctp_chunk *chunk, gfp_t gfp) |
1da177e4 LT |
136 | { |
137 | struct sctp_ulpevent *event; | |
138 | struct sctp_assoc_change *sac; | |
139 | struct sk_buff *skb; | |
140 | ||
a5a35e76 VY |
141 | /* If the lower layer passed in the chunk, it will be |
142 | * an ABORT, so we need to include it in the sac_info. | |
143 | */ | |
144 | if (chunk) { | |
a5a35e76 VY |
145 | /* Copy the chunk data to a new skb and reserve enough |
146 | * head room to use as notification. | |
147 | */ | |
148 | skb = skb_copy_expand(chunk->skb, | |
149 | sizeof(struct sctp_assoc_change), 0, gfp); | |
150 | ||
151 | if (!skb) | |
152 | goto fail; | |
153 | ||
a5a35e76 VY |
154 | /* Embed the event fields inside the cloned skb. */ |
155 | event = sctp_skb2event(skb); | |
156 | sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize); | |
157 | ||
158 | /* Include the notification structure */ | |
159 | sac = (struct sctp_assoc_change *) | |
160 | skb_push(skb, sizeof(struct sctp_assoc_change)); | |
161 | ||
162 | /* Trim the buffer to the right length. */ | |
163 | skb_trim(skb, sizeof(struct sctp_assoc_change) + | |
ac40e41f VY |
164 | ntohs(chunk->chunk_hdr->length) - |
165 | sizeof(sctp_chunkhdr_t)); | |
a5a35e76 VY |
166 | } else { |
167 | event = sctp_ulpevent_new(sizeof(struct sctp_assoc_change), | |
1da177e4 | 168 | MSG_NOTIFICATION, gfp); |
a5a35e76 VY |
169 | if (!event) |
170 | goto fail; | |
171 | ||
172 | skb = sctp_event2skb(event); | |
173 | sac = (struct sctp_assoc_change *) skb_put(skb, | |
174 | sizeof(struct sctp_assoc_change)); | |
175 | } | |
1da177e4 LT |
176 | |
177 | /* Socket Extensions for SCTP | |
178 | * 5.3.1.1 SCTP_ASSOC_CHANGE | |
179 | * | |
180 | * sac_type: | |
181 | * It should be SCTP_ASSOC_CHANGE. | |
182 | */ | |
183 | sac->sac_type = SCTP_ASSOC_CHANGE; | |
184 | ||
185 | /* Socket Extensions for SCTP | |
186 | * 5.3.1.1 SCTP_ASSOC_CHANGE | |
187 | * | |
188 | * sac_state: 32 bits (signed integer) | |
189 | * This field holds one of a number of values that communicate the | |
190 | * event that happened to the association. | |
191 | */ | |
192 | sac->sac_state = state; | |
193 | ||
194 | /* Socket Extensions for SCTP | |
195 | * 5.3.1.1 SCTP_ASSOC_CHANGE | |
196 | * | |
197 | * sac_flags: 16 bits (unsigned integer) | |
198 | * Currently unused. | |
199 | */ | |
200 | sac->sac_flags = 0; | |
201 | ||
202 | /* Socket Extensions for SCTP | |
203 | * 5.3.1.1 SCTP_ASSOC_CHANGE | |
204 | * | |
205 | * sac_length: sizeof (__u32) | |
206 | * This field is the total length of the notification data, including | |
207 | * the notification header. | |
208 | */ | |
b90a137d | 209 | sac->sac_length = skb->len; |
1da177e4 LT |
210 | |
211 | /* Socket Extensions for SCTP | |
212 | * 5.3.1.1 SCTP_ASSOC_CHANGE | |
213 | * | |
214 | * sac_error: 32 bits (signed integer) | |
215 | * | |
216 | * If the state was reached due to a error condition (e.g. | |
217 | * COMMUNICATION_LOST) any relevant error information is available in | |
218 | * this field. This corresponds to the protocol error codes defined in | |
219 | * [SCTP]. | |
220 | */ | |
221 | sac->sac_error = error; | |
222 | ||
223 | /* Socket Extensions for SCTP | |
224 | * 5.3.1.1 SCTP_ASSOC_CHANGE | |
225 | * | |
226 | * sac_outbound_streams: 16 bits (unsigned integer) | |
227 | * sac_inbound_streams: 16 bits (unsigned integer) | |
228 | * | |
229 | * The maximum number of streams allowed in each direction are | |
230 | * available in sac_outbound_streams and sac_inbound streams. | |
231 | */ | |
232 | sac->sac_outbound_streams = outbound; | |
233 | sac->sac_inbound_streams = inbound; | |
234 | ||
235 | /* Socket Extensions for SCTP | |
236 | * 5.3.1.1 SCTP_ASSOC_CHANGE | |
237 | * | |
238 | * sac_assoc_id: sizeof (sctp_assoc_t) | |
239 | * | |
240 | * The association id field, holds the identifier for the association. | |
241 | * All notifications for a given association have the same association | |
242 | * identifier. For TCP style socket, this field is ignored. | |
243 | */ | |
244 | sctp_ulpevent_set_owner(event, asoc); | |
245 | sac->sac_assoc_id = sctp_assoc2id(asoc); | |
246 | ||
247 | return event; | |
248 | ||
249 | fail: | |
250 | return NULL; | |
251 | } | |
252 | ||
253 | /* Create and initialize an SCTP_PEER_ADDR_CHANGE event. | |
254 | * | |
255 | * Socket Extensions for SCTP - draft-01 | |
256 | * 5.3.1.2 SCTP_PEER_ADDR_CHANGE | |
257 | * | |
258 | * When a destination address on a multi-homed peer encounters a change | |
259 | * an interface details event is sent. | |
260 | */ | |
261 | struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change( | |
262 | const struct sctp_association *asoc, | |
263 | const struct sockaddr_storage *aaddr, | |
dd0fc66f | 264 | int flags, int state, int error, gfp_t gfp) |
1da177e4 LT |
265 | { |
266 | struct sctp_ulpevent *event; | |
267 | struct sctp_paddr_change *spc; | |
268 | struct sk_buff *skb; | |
269 | ||
270 | event = sctp_ulpevent_new(sizeof(struct sctp_paddr_change), | |
271 | MSG_NOTIFICATION, gfp); | |
272 | if (!event) | |
273 | goto fail; | |
274 | ||
275 | skb = sctp_event2skb(event); | |
276 | spc = (struct sctp_paddr_change *) | |
277 | skb_put(skb, sizeof(struct sctp_paddr_change)); | |
278 | ||
279 | /* Sockets API Extensions for SCTP | |
280 | * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE | |
281 | * | |
282 | * spc_type: | |
283 | * | |
284 | * It should be SCTP_PEER_ADDR_CHANGE. | |
285 | */ | |
286 | spc->spc_type = SCTP_PEER_ADDR_CHANGE; | |
287 | ||
288 | /* Sockets API Extensions for SCTP | |
289 | * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE | |
290 | * | |
291 | * spc_length: sizeof (__u32) | |
292 | * | |
293 | * This field is the total length of the notification data, including | |
294 | * the notification header. | |
295 | */ | |
296 | spc->spc_length = sizeof(struct sctp_paddr_change); | |
297 | ||
298 | /* Sockets API Extensions for SCTP | |
299 | * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE | |
300 | * | |
301 | * spc_flags: 16 bits (unsigned integer) | |
302 | * Currently unused. | |
303 | */ | |
304 | spc->spc_flags = 0; | |
305 | ||
306 | /* Sockets API Extensions for SCTP | |
307 | * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE | |
308 | * | |
309 | * spc_state: 32 bits (signed integer) | |
310 | * | |
311 | * This field holds one of a number of values that communicate the | |
312 | * event that happened to the address. | |
313 | */ | |
314 | spc->spc_state = state; | |
315 | ||
316 | /* Sockets API Extensions for SCTP | |
317 | * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE | |
318 | * | |
319 | * spc_error: 32 bits (signed integer) | |
320 | * | |
321 | * If the state was reached due to any error condition (e.g. | |
322 | * ADDRESS_UNREACHABLE) any relevant error information is available in | |
323 | * this field. | |
324 | */ | |
325 | spc->spc_error = error; | |
326 | ||
327 | /* Socket Extensions for SCTP | |
328 | * 5.3.1.1 SCTP_ASSOC_CHANGE | |
329 | * | |
330 | * spc_assoc_id: sizeof (sctp_assoc_t) | |
331 | * | |
332 | * The association id field, holds the identifier for the association. | |
333 | * All notifications for a given association have the same association | |
334 | * identifier. For TCP style socket, this field is ignored. | |
335 | */ | |
336 | sctp_ulpevent_set_owner(event, asoc); | |
337 | spc->spc_assoc_id = sctp_assoc2id(asoc); | |
338 | ||
339 | /* Sockets API Extensions for SCTP | |
340 | * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE | |
341 | * | |
342 | * spc_aaddr: sizeof (struct sockaddr_storage) | |
343 | * | |
344 | * The affected address field, holds the remote peer's address that is | |
345 | * encountering the change of state. | |
346 | */ | |
347 | memcpy(&spc->spc_aaddr, aaddr, sizeof(struct sockaddr_storage)); | |
348 | ||
349 | /* Map ipv4 address into v4-mapped-on-v6 address. */ | |
350 | sctp_get_pf_specific(asoc->base.sk->sk_family)->addr_v4map( | |
351 | sctp_sk(asoc->base.sk), | |
352 | (union sctp_addr *)&spc->spc_aaddr); | |
353 | ||
354 | return event; | |
355 | ||
356 | fail: | |
357 | return NULL; | |
358 | } | |
359 | ||
360 | /* Create and initialize an SCTP_REMOTE_ERROR notification. | |
361 | * | |
362 | * Note: This assumes that the chunk->skb->data already points to the | |
363 | * operation error payload. | |
364 | * | |
365 | * Socket Extensions for SCTP - draft-01 | |
366 | * 5.3.1.3 SCTP_REMOTE_ERROR | |
367 | * | |
368 | * A remote peer may send an Operational Error message to its peer. | |
369 | * This message indicates a variety of error conditions on an | |
370 | * association. The entire error TLV as it appears on the wire is | |
371 | * included in a SCTP_REMOTE_ERROR event. Please refer to the SCTP | |
372 | * specification [SCTP] and any extensions for a list of possible | |
373 | * error formats. | |
374 | */ | |
375 | struct sctp_ulpevent *sctp_ulpevent_make_remote_error( | |
376 | const struct sctp_association *asoc, struct sctp_chunk *chunk, | |
dd0fc66f | 377 | __u16 flags, gfp_t gfp) |
1da177e4 LT |
378 | { |
379 | struct sctp_ulpevent *event; | |
380 | struct sctp_remote_error *sre; | |
381 | struct sk_buff *skb; | |
382 | sctp_errhdr_t *ch; | |
9f81bcd9 | 383 | __be16 cause; |
1da177e4 LT |
384 | int elen; |
385 | ||
386 | ch = (sctp_errhdr_t *)(chunk->skb->data); | |
387 | cause = ch->cause; | |
388 | elen = WORD_ROUND(ntohs(ch->length)) - sizeof(sctp_errhdr_t); | |
389 | ||
390 | /* Pull off the ERROR header. */ | |
391 | skb_pull(chunk->skb, sizeof(sctp_errhdr_t)); | |
392 | ||
393 | /* Copy the skb to a new skb with room for us to prepend | |
394 | * notification with. | |
395 | */ | |
396 | skb = skb_copy_expand(chunk->skb, sizeof(struct sctp_remote_error), | |
397 | 0, gfp); | |
398 | ||
399 | /* Pull off the rest of the cause TLV from the chunk. */ | |
400 | skb_pull(chunk->skb, elen); | |
401 | if (!skb) | |
402 | goto fail; | |
403 | ||
404 | /* Embed the event fields inside the cloned skb. */ | |
405 | event = sctp_skb2event(skb); | |
331c4ee7 | 406 | sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize); |
1da177e4 LT |
407 | |
408 | sre = (struct sctp_remote_error *) | |
409 | skb_push(skb, sizeof(struct sctp_remote_error)); | |
410 | ||
411 | /* Trim the buffer to the right length. */ | |
412 | skb_trim(skb, sizeof(struct sctp_remote_error) + elen); | |
413 | ||
414 | /* Socket Extensions for SCTP | |
415 | * 5.3.1.3 SCTP_REMOTE_ERROR | |
416 | * | |
417 | * sre_type: | |
418 | * It should be SCTP_REMOTE_ERROR. | |
419 | */ | |
420 | sre->sre_type = SCTP_REMOTE_ERROR; | |
421 | ||
422 | /* | |
423 | * Socket Extensions for SCTP | |
424 | * 5.3.1.3 SCTP_REMOTE_ERROR | |
425 | * | |
426 | * sre_flags: 16 bits (unsigned integer) | |
427 | * Currently unused. | |
428 | */ | |
429 | sre->sre_flags = 0; | |
430 | ||
431 | /* Socket Extensions for SCTP | |
432 | * 5.3.1.3 SCTP_REMOTE_ERROR | |
433 | * | |
434 | * sre_length: sizeof (__u32) | |
435 | * | |
436 | * This field is the total length of the notification data, | |
437 | * including the notification header. | |
438 | */ | |
439 | sre->sre_length = skb->len; | |
440 | ||
441 | /* Socket Extensions for SCTP | |
442 | * 5.3.1.3 SCTP_REMOTE_ERROR | |
443 | * | |
444 | * sre_error: 16 bits (unsigned integer) | |
445 | * This value represents one of the Operational Error causes defined in | |
446 | * the SCTP specification, in network byte order. | |
447 | */ | |
448 | sre->sre_error = cause; | |
449 | ||
450 | /* Socket Extensions for SCTP | |
451 | * 5.3.1.3 SCTP_REMOTE_ERROR | |
452 | * | |
453 | * sre_assoc_id: sizeof (sctp_assoc_t) | |
454 | * | |
455 | * The association id field, holds the identifier for the association. | |
456 | * All notifications for a given association have the same association | |
457 | * identifier. For TCP style socket, this field is ignored. | |
458 | */ | |
459 | sctp_ulpevent_set_owner(event, asoc); | |
460 | sre->sre_assoc_id = sctp_assoc2id(asoc); | |
461 | ||
462 | return event; | |
463 | ||
464 | fail: | |
465 | return NULL; | |
466 | } | |
467 | ||
468 | /* Create and initialize a SCTP_SEND_FAILED notification. | |
469 | * | |
470 | * Socket Extensions for SCTP - draft-01 | |
471 | * 5.3.1.4 SCTP_SEND_FAILED | |
472 | */ | |
473 | struct sctp_ulpevent *sctp_ulpevent_make_send_failed( | |
474 | const struct sctp_association *asoc, struct sctp_chunk *chunk, | |
dd0fc66f | 475 | __u16 flags, __u32 error, gfp_t gfp) |
1da177e4 LT |
476 | { |
477 | struct sctp_ulpevent *event; | |
478 | struct sctp_send_failed *ssf; | |
479 | struct sk_buff *skb; | |
480 | ||
481 | /* Pull off any padding. */ | |
482 | int len = ntohs(chunk->chunk_hdr->length); | |
483 | ||
484 | /* Make skb with more room so we can prepend notification. */ | |
485 | skb = skb_copy_expand(chunk->skb, | |
486 | sizeof(struct sctp_send_failed), /* headroom */ | |
487 | 0, /* tailroom */ | |
488 | gfp); | |
489 | if (!skb) | |
490 | goto fail; | |
491 | ||
492 | /* Pull off the common chunk header and DATA header. */ | |
493 | skb_pull(skb, sizeof(struct sctp_data_chunk)); | |
494 | len -= sizeof(struct sctp_data_chunk); | |
495 | ||
496 | /* Embed the event fields inside the cloned skb. */ | |
497 | event = sctp_skb2event(skb); | |
331c4ee7 | 498 | sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize); |
1da177e4 LT |
499 | |
500 | ssf = (struct sctp_send_failed *) | |
501 | skb_push(skb, sizeof(struct sctp_send_failed)); | |
502 | ||
503 | /* Socket Extensions for SCTP | |
504 | * 5.3.1.4 SCTP_SEND_FAILED | |
505 | * | |
506 | * ssf_type: | |
507 | * It should be SCTP_SEND_FAILED. | |
508 | */ | |
509 | ssf->ssf_type = SCTP_SEND_FAILED; | |
510 | ||
511 | /* Socket Extensions for SCTP | |
512 | * 5.3.1.4 SCTP_SEND_FAILED | |
513 | * | |
514 | * ssf_flags: 16 bits (unsigned integer) | |
515 | * The flag value will take one of the following values | |
516 | * | |
517 | * SCTP_DATA_UNSENT - Indicates that the data was never put on | |
518 | * the wire. | |
519 | * | |
520 | * SCTP_DATA_SENT - Indicates that the data was put on the wire. | |
521 | * Note that this does not necessarily mean that the | |
522 | * data was (or was not) successfully delivered. | |
523 | */ | |
524 | ssf->ssf_flags = flags; | |
525 | ||
526 | /* Socket Extensions for SCTP | |
527 | * 5.3.1.4 SCTP_SEND_FAILED | |
528 | * | |
529 | * ssf_length: sizeof (__u32) | |
530 | * This field is the total length of the notification data, including | |
531 | * the notification header. | |
532 | */ | |
533 | ssf->ssf_length = sizeof(struct sctp_send_failed) + len; | |
534 | skb_trim(skb, ssf->ssf_length); | |
535 | ||
536 | /* Socket Extensions for SCTP | |
537 | * 5.3.1.4 SCTP_SEND_FAILED | |
538 | * | |
539 | * ssf_error: 16 bits (unsigned integer) | |
540 | * This value represents the reason why the send failed, and if set, | |
541 | * will be a SCTP protocol error code as defined in [SCTP] section | |
542 | * 3.3.10. | |
543 | */ | |
544 | ssf->ssf_error = error; | |
545 | ||
546 | /* Socket Extensions for SCTP | |
547 | * 5.3.1.4 SCTP_SEND_FAILED | |
548 | * | |
549 | * ssf_info: sizeof (struct sctp_sndrcvinfo) | |
550 | * The original send information associated with the undelivered | |
551 | * message. | |
552 | */ | |
553 | memcpy(&ssf->ssf_info, &chunk->sinfo, sizeof(struct sctp_sndrcvinfo)); | |
554 | ||
555 | /* Per TSVWG discussion with Randy. Allow the application to | |
556 | * ressemble a fragmented message. | |
557 | */ | |
558 | ssf->ssf_info.sinfo_flags = chunk->chunk_hdr->flags; | |
559 | ||
560 | /* Socket Extensions for SCTP | |
561 | * 5.3.1.4 SCTP_SEND_FAILED | |
562 | * | |
563 | * ssf_assoc_id: sizeof (sctp_assoc_t) | |
564 | * The association id field, sf_assoc_id, holds the identifier for the | |
565 | * association. All notifications for a given association have the | |
566 | * same association identifier. For TCP style socket, this field is | |
567 | * ignored. | |
568 | */ | |
569 | sctp_ulpevent_set_owner(event, asoc); | |
570 | ssf->ssf_assoc_id = sctp_assoc2id(asoc); | |
571 | return event; | |
572 | ||
573 | fail: | |
574 | return NULL; | |
575 | } | |
576 | ||
577 | /* Create and initialize a SCTP_SHUTDOWN_EVENT notification. | |
578 | * | |
579 | * Socket Extensions for SCTP - draft-01 | |
580 | * 5.3.1.5 SCTP_SHUTDOWN_EVENT | |
581 | */ | |
582 | struct sctp_ulpevent *sctp_ulpevent_make_shutdown_event( | |
583 | const struct sctp_association *asoc, | |
dd0fc66f | 584 | __u16 flags, gfp_t gfp) |
1da177e4 LT |
585 | { |
586 | struct sctp_ulpevent *event; | |
587 | struct sctp_shutdown_event *sse; | |
588 | struct sk_buff *skb; | |
589 | ||
590 | event = sctp_ulpevent_new(sizeof(struct sctp_shutdown_event), | |
591 | MSG_NOTIFICATION, gfp); | |
592 | if (!event) | |
593 | goto fail; | |
594 | ||
595 | skb = sctp_event2skb(event); | |
596 | sse = (struct sctp_shutdown_event *) | |
597 | skb_put(skb, sizeof(struct sctp_shutdown_event)); | |
598 | ||
599 | /* Socket Extensions for SCTP | |
600 | * 5.3.1.5 SCTP_SHUTDOWN_EVENT | |
601 | * | |
602 | * sse_type | |
603 | * It should be SCTP_SHUTDOWN_EVENT | |
604 | */ | |
605 | sse->sse_type = SCTP_SHUTDOWN_EVENT; | |
606 | ||
607 | /* Socket Extensions for SCTP | |
608 | * 5.3.1.5 SCTP_SHUTDOWN_EVENT | |
609 | * | |
610 | * sse_flags: 16 bits (unsigned integer) | |
611 | * Currently unused. | |
612 | */ | |
613 | sse->sse_flags = 0; | |
614 | ||
615 | /* Socket Extensions for SCTP | |
616 | * 5.3.1.5 SCTP_SHUTDOWN_EVENT | |
617 | * | |
618 | * sse_length: sizeof (__u32) | |
619 | * This field is the total length of the notification data, including | |
620 | * the notification header. | |
621 | */ | |
622 | sse->sse_length = sizeof(struct sctp_shutdown_event); | |
623 | ||
624 | /* Socket Extensions for SCTP | |
625 | * 5.3.1.5 SCTP_SHUTDOWN_EVENT | |
626 | * | |
627 | * sse_assoc_id: sizeof (sctp_assoc_t) | |
628 | * The association id field, holds the identifier for the association. | |
629 | * All notifications for a given association have the same association | |
630 | * identifier. For TCP style socket, this field is ignored. | |
631 | */ | |
632 | sctp_ulpevent_set_owner(event, asoc); | |
633 | sse->sse_assoc_id = sctp_assoc2id(asoc); | |
634 | ||
635 | return event; | |
636 | ||
637 | fail: | |
638 | return NULL; | |
639 | } | |
640 | ||
0f3fffd8 | 641 | /* Create and initialize a SCTP_ADAPTATION_INDICATION notification. |
1da177e4 LT |
642 | * |
643 | * Socket Extensions for SCTP | |
0f3fffd8 | 644 | * 5.3.1.6 SCTP_ADAPTATION_INDICATION |
1da177e4 | 645 | */ |
0f3fffd8 | 646 | struct sctp_ulpevent *sctp_ulpevent_make_adaptation_indication( |
dd0fc66f | 647 | const struct sctp_association *asoc, gfp_t gfp) |
1da177e4 LT |
648 | { |
649 | struct sctp_ulpevent *event; | |
0f3fffd8 | 650 | struct sctp_adaptation_event *sai; |
1da177e4 LT |
651 | struct sk_buff *skb; |
652 | ||
0f3fffd8 | 653 | event = sctp_ulpevent_new(sizeof(struct sctp_adaptation_event), |
1da177e4 LT |
654 | MSG_NOTIFICATION, gfp); |
655 | if (!event) | |
656 | goto fail; | |
657 | ||
658 | skb = sctp_event2skb(event); | |
0f3fffd8 ISJ |
659 | sai = (struct sctp_adaptation_event *) |
660 | skb_put(skb, sizeof(struct sctp_adaptation_event)); | |
1da177e4 | 661 | |
0f3fffd8 | 662 | sai->sai_type = SCTP_ADAPTATION_INDICATION; |
1da177e4 | 663 | sai->sai_flags = 0; |
0f3fffd8 ISJ |
664 | sai->sai_length = sizeof(struct sctp_adaptation_event); |
665 | sai->sai_adaptation_ind = asoc->peer.adaptation_ind; | |
1da177e4 LT |
666 | sctp_ulpevent_set_owner(event, asoc); |
667 | sai->sai_assoc_id = sctp_assoc2id(asoc); | |
668 | ||
669 | return event; | |
670 | ||
671 | fail: | |
672 | return NULL; | |
673 | } | |
674 | ||
675 | /* A message has been received. Package this message as a notification | |
676 | * to pass it to the upper layers. Go ahead and calculate the sndrcvinfo | |
677 | * even if filtered out later. | |
678 | * | |
679 | * Socket Extensions for SCTP | |
680 | * 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV) | |
681 | */ | |
682 | struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc, | |
683 | struct sctp_chunk *chunk, | |
dd0fc66f | 684 | gfp_t gfp) |
1da177e4 LT |
685 | { |
686 | struct sctp_ulpevent *event = NULL; | |
687 | struct sk_buff *skb; | |
688 | size_t padding, len; | |
4d93df0a NH |
689 | int rx_count; |
690 | ||
691 | /* | |
692 | * check to see if we need to make space for this | |
693 | * new skb, expand the rcvbuffer if needed, or drop | |
694 | * the frame | |
695 | */ | |
696 | if (asoc->ep->rcvbuf_policy) | |
697 | rx_count = atomic_read(&asoc->rmem_alloc); | |
698 | else | |
699 | rx_count = atomic_read(&asoc->base.sk->sk_rmem_alloc); | |
700 | ||
701 | if (rx_count >= asoc->base.sk->sk_rcvbuf) { | |
702 | ||
703 | if ((asoc->base.sk->sk_userlocks & SOCK_RCVBUF_LOCK) || | |
3ab224be | 704 | (!sk_rmem_schedule(asoc->base.sk, chunk->skb->truesize))) |
4d93df0a NH |
705 | goto fail; |
706 | } | |
1da177e4 LT |
707 | |
708 | /* Clone the original skb, sharing the data. */ | |
709 | skb = skb_clone(chunk->skb, gfp); | |
710 | if (!skb) | |
711 | goto fail; | |
712 | ||
3888e9ef VY |
713 | /* Now that all memory allocations for this chunk succeeded, we |
714 | * can mark it as received so the tsn_map is updated correctly. | |
715 | */ | |
716 | sctp_tsnmap_mark(&asoc->peer.tsn_map, ntohl(chunk->subh.data_hdr->tsn)); | |
717 | ||
1da177e4 LT |
718 | /* First calculate the padding, so we don't inadvertently |
719 | * pass up the wrong length to the user. | |
720 | * | |
721 | * RFC 2960 - Section 3.2 Chunk Field Descriptions | |
722 | * | |
723 | * The total length of a chunk(including Type, Length and Value fields) | |
724 | * MUST be a multiple of 4 bytes. If the length of the chunk is not a | |
725 | * multiple of 4 bytes, the sender MUST pad the chunk with all zero | |
726 | * bytes and this padding is not included in the chunk length field. | |
727 | * The sender should never pad with more than 3 bytes. The receiver | |
728 | * MUST ignore the padding bytes. | |
729 | */ | |
730 | len = ntohs(chunk->chunk_hdr->length); | |
731 | padding = WORD_ROUND(len) - len; | |
732 | ||
733 | /* Fixup cloned skb with just this chunks data. */ | |
734 | skb_trim(skb, chunk->chunk_end - padding - skb->data); | |
735 | ||
736 | /* Embed the event fields inside the cloned skb. */ | |
737 | event = sctp_skb2event(skb); | |
738 | ||
331c4ee7 VY |
739 | /* Initialize event with flags 0 and correct length |
740 | * Since this is a clone of the original skb, only account for | |
741 | * the data of this chunk as other chunks will be accounted separately. | |
742 | */ | |
743 | sctp_ulpevent_init(event, 0, skb->len + sizeof(struct sk_buff)); | |
1da177e4 LT |
744 | |
745 | sctp_ulpevent_receive_data(event, asoc); | |
746 | ||
747 | event->stream = ntohs(chunk->subh.data_hdr->stream); | |
748 | event->ssn = ntohs(chunk->subh.data_hdr->ssn); | |
749 | event->ppid = chunk->subh.data_hdr->ppid; | |
750 | if (chunk->chunk_hdr->flags & SCTP_DATA_UNORDERED) { | |
eaa5c54d | 751 | event->flags |= SCTP_UNORDERED; |
1da177e4 LT |
752 | event->cumtsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map); |
753 | } | |
754 | event->tsn = ntohl(chunk->subh.data_hdr->tsn); | |
755 | event->msg_flags |= chunk->chunk_hdr->flags; | |
756 | event->iif = sctp_chunk_iif(chunk); | |
757 | ||
758 | fail: | |
759 | return event; | |
760 | } | |
761 | ||
762 | /* Create a partial delivery related event. | |
763 | * | |
764 | * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT | |
765 | * | |
766 | * When a receiver is engaged in a partial delivery of a | |
767 | * message this notification will be used to indicate | |
768 | * various events. | |
769 | */ | |
770 | struct sctp_ulpevent *sctp_ulpevent_make_pdapi( | |
3182cd84 | 771 | const struct sctp_association *asoc, __u32 indication, |
dd0fc66f | 772 | gfp_t gfp) |
1da177e4 LT |
773 | { |
774 | struct sctp_ulpevent *event; | |
775 | struct sctp_pdapi_event *pd; | |
776 | struct sk_buff *skb; | |
777 | ||
778 | event = sctp_ulpevent_new(sizeof(struct sctp_pdapi_event), | |
779 | MSG_NOTIFICATION, gfp); | |
780 | if (!event) | |
781 | goto fail; | |
782 | ||
783 | skb = sctp_event2skb(event); | |
784 | pd = (struct sctp_pdapi_event *) | |
785 | skb_put(skb, sizeof(struct sctp_pdapi_event)); | |
786 | ||
787 | /* pdapi_type | |
788 | * It should be SCTP_PARTIAL_DELIVERY_EVENT | |
789 | * | |
790 | * pdapi_flags: 16 bits (unsigned integer) | |
791 | * Currently unused. | |
792 | */ | |
793 | pd->pdapi_type = SCTP_PARTIAL_DELIVERY_EVENT; | |
794 | pd->pdapi_flags = 0; | |
795 | ||
796 | /* pdapi_length: 32 bits (unsigned integer) | |
797 | * | |
798 | * This field is the total length of the notification data, including | |
799 | * the notification header. It will generally be sizeof (struct | |
800 | * sctp_pdapi_event). | |
801 | */ | |
802 | pd->pdapi_length = sizeof(struct sctp_pdapi_event); | |
803 | ||
d808ad9a | 804 | /* pdapi_indication: 32 bits (unsigned integer) |
1da177e4 LT |
805 | * |
806 | * This field holds the indication being sent to the application. | |
807 | */ | |
808 | pd->pdapi_indication = indication; | |
809 | ||
810 | /* pdapi_assoc_id: sizeof (sctp_assoc_t) | |
811 | * | |
812 | * The association id field, holds the identifier for the association. | |
813 | */ | |
814 | sctp_ulpevent_set_owner(event, asoc); | |
815 | pd->pdapi_assoc_id = sctp_assoc2id(asoc); | |
816 | ||
817 | return event; | |
818 | fail: | |
819 | return NULL; | |
820 | } | |
821 | ||
65b07e5d VY |
822 | struct sctp_ulpevent *sctp_ulpevent_make_authkey( |
823 | const struct sctp_association *asoc, __u16 key_id, | |
824 | __u32 indication, gfp_t gfp) | |
825 | { | |
826 | struct sctp_ulpevent *event; | |
827 | struct sctp_authkey_event *ak; | |
828 | struct sk_buff *skb; | |
829 | ||
830 | event = sctp_ulpevent_new(sizeof(struct sctp_authkey_event), | |
831 | MSG_NOTIFICATION, gfp); | |
832 | if (!event) | |
833 | goto fail; | |
834 | ||
835 | skb = sctp_event2skb(event); | |
836 | ak = (struct sctp_authkey_event *) | |
837 | skb_put(skb, sizeof(struct sctp_authkey_event)); | |
838 | ||
f691724c | 839 | ak->auth_type = SCTP_AUTHENTICATION_INDICATION; |
65b07e5d VY |
840 | ak->auth_flags = 0; |
841 | ak->auth_length = sizeof(struct sctp_authkey_event); | |
842 | ||
843 | ak->auth_keynumber = key_id; | |
844 | ak->auth_altkeynumber = 0; | |
845 | ak->auth_indication = indication; | |
846 | ||
847 | /* | |
848 | * The association id field, holds the identifier for the association. | |
849 | */ | |
850 | sctp_ulpevent_set_owner(event, asoc); | |
851 | ak->auth_assoc_id = sctp_assoc2id(asoc); | |
852 | ||
853 | return event; | |
854 | fail: | |
855 | return NULL; | |
856 | } | |
857 | ||
858 | ||
1da177e4 LT |
859 | /* Return the notification type, assuming this is a notification |
860 | * event. | |
861 | */ | |
862 | __u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event) | |
863 | { | |
864 | union sctp_notification *notification; | |
865 | struct sk_buff *skb; | |
866 | ||
ab38fb04 | 867 | skb = sctp_event2skb(event); |
1da177e4 LT |
868 | notification = (union sctp_notification *) skb->data; |
869 | return notification->sn_header.sn_type; | |
870 | } | |
871 | ||
872 | /* Copy out the sndrcvinfo into a msghdr. */ | |
873 | void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event, | |
874 | struct msghdr *msghdr) | |
875 | { | |
876 | struct sctp_sndrcvinfo sinfo; | |
877 | ||
878 | if (sctp_ulpevent_is_notification(event)) | |
879 | return; | |
880 | ||
881 | /* Sockets API Extensions for SCTP | |
d808ad9a YH |
882 | * Section 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV) |
883 | * | |
884 | * sinfo_stream: 16 bits (unsigned integer) | |
885 | * | |
886 | * For recvmsg() the SCTP stack places the message's stream number in | |
887 | * this value. | |
888 | */ | |
1da177e4 LT |
889 | sinfo.sinfo_stream = event->stream; |
890 | /* sinfo_ssn: 16 bits (unsigned integer) | |
891 | * | |
892 | * For recvmsg() this value contains the stream sequence number that | |
893 | * the remote endpoint placed in the DATA chunk. For fragmented | |
894 | * messages this is the same number for all deliveries of the message | |
895 | * (if more than one recvmsg() is needed to read the message). | |
896 | */ | |
897 | sinfo.sinfo_ssn = event->ssn; | |
898 | /* sinfo_ppid: 32 bits (unsigned integer) | |
899 | * | |
900 | * In recvmsg() this value is | |
901 | * the same information that was passed by the upper layer in the peer | |
902 | * application. Please note that byte order issues are NOT accounted | |
903 | * for and this information is passed opaquely by the SCTP stack from | |
904 | * one end to the other. | |
905 | */ | |
906 | sinfo.sinfo_ppid = event->ppid; | |
907 | /* sinfo_flags: 16 bits (unsigned integer) | |
908 | * | |
909 | * This field may contain any of the following flags and is composed of | |
910 | * a bitwise OR of these values. | |
911 | * | |
912 | * recvmsg() flags: | |
913 | * | |
eaa5c54d | 914 | * SCTP_UNORDERED - This flag is present when the message was sent |
1da177e4 LT |
915 | * non-ordered. |
916 | */ | |
917 | sinfo.sinfo_flags = event->flags; | |
918 | /* sinfo_tsn: 32 bit (unsigned integer) | |
919 | * | |
d808ad9a | 920 | * For the receiving side, this field holds a TSN that was |
1da177e4 LT |
921 | * assigned to one of the SCTP Data Chunks. |
922 | */ | |
923 | sinfo.sinfo_tsn = event->tsn; | |
924 | /* sinfo_cumtsn: 32 bit (unsigned integer) | |
925 | * | |
926 | * This field will hold the current cumulative TSN as | |
927 | * known by the underlying SCTP layer. Note this field is | |
928 | * ignored when sending and only valid for a receive | |
eaa5c54d | 929 | * operation when sinfo_flags are set to SCTP_UNORDERED. |
1da177e4 LT |
930 | */ |
931 | sinfo.sinfo_cumtsn = event->cumtsn; | |
932 | /* sinfo_assoc_id: sizeof (sctp_assoc_t) | |
933 | * | |
934 | * The association handle field, sinfo_assoc_id, holds the identifier | |
935 | * for the association announced in the COMMUNICATION_UP notification. | |
936 | * All notifications for a given association have the same identifier. | |
937 | * Ignored for one-to-one style sockets. | |
938 | */ | |
939 | sinfo.sinfo_assoc_id = sctp_assoc2id(event->asoc); | |
940 | ||
6ab792f5 ISJ |
941 | /* context value that is set via SCTP_CONTEXT socket option. */ |
942 | sinfo.sinfo_context = event->asoc->default_rcv_context; | |
943 | ||
1da177e4 | 944 | /* These fields are not used while receiving. */ |
1da177e4 LT |
945 | sinfo.sinfo_timetolive = 0; |
946 | ||
947 | put_cmsg(msghdr, IPPROTO_SCTP, SCTP_SNDRCV, | |
948 | sizeof(struct sctp_sndrcvinfo), (void *)&sinfo); | |
949 | } | |
950 | ||
951 | /* Do accounting for bytes received and hold a reference to the association | |
952 | * for each skb. | |
953 | */ | |
954 | static void sctp_ulpevent_receive_data(struct sctp_ulpevent *event, | |
955 | struct sctp_association *asoc) | |
956 | { | |
957 | struct sk_buff *skb, *frag; | |
958 | ||
959 | skb = sctp_event2skb(event); | |
960 | /* Set the owner and charge rwnd for bytes received. */ | |
961 | sctp_ulpevent_set_owner(event, asoc); | |
962 | sctp_assoc_rwnd_decrease(asoc, skb_headlen(skb)); | |
963 | ||
964 | if (!skb->data_len) | |
965 | return; | |
966 | ||
967 | /* Note: Not clearing the entire event struct as this is just a | |
968 | * fragment of the real event. However, we still need to do rwnd | |
969 | * accounting. | |
970 | * In general, the skb passed from IP can have only 1 level of | |
d808ad9a | 971 | * fragments. But we allow multiple levels of fragments. |
1da177e4 LT |
972 | */ |
973 | for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) { | |
974 | sctp_ulpevent_receive_data(sctp_skb2event(frag), asoc); | |
975 | } | |
976 | } | |
977 | ||
978 | /* Do accounting for bytes just read by user and release the references to | |
979 | * the association. | |
d808ad9a | 980 | */ |
1da177e4 LT |
981 | static void sctp_ulpevent_release_data(struct sctp_ulpevent *event) |
982 | { | |
983 | struct sk_buff *skb, *frag; | |
d7c2c9e3 | 984 | unsigned int len; |
1da177e4 LT |
985 | |
986 | /* Current stack structures assume that the rcv buffer is | |
987 | * per socket. For UDP style sockets this is not true as | |
988 | * multiple associations may be on a single UDP-style socket. | |
989 | * Use the local private area of the skb to track the owning | |
990 | * association. | |
991 | */ | |
992 | ||
993 | skb = sctp_event2skb(event); | |
d7c2c9e3 TF |
994 | len = skb->len; |
995 | ||
996 | if (!skb->data_len) | |
997 | goto done; | |
998 | ||
999 | /* Don't forget the fragments. */ | |
1000 | for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) { | |
1001 | /* NOTE: skb_shinfos are recursive. Although IP returns | |
1002 | * skb's with only 1 level of fragments, SCTP reassembly can | |
1003 | * increase the levels. | |
1004 | */ | |
1005 | sctp_ulpevent_release_frag_data(sctp_skb2event(frag)); | |
1006 | } | |
1007 | ||
1008 | done: | |
1009 | sctp_assoc_rwnd_increase(event->asoc, len); | |
1010 | sctp_ulpevent_release_owner(event); | |
1011 | } | |
1012 | ||
1013 | static void sctp_ulpevent_release_frag_data(struct sctp_ulpevent *event) | |
1014 | { | |
1015 | struct sk_buff *skb, *frag; | |
1016 | ||
1017 | skb = sctp_event2skb(event); | |
1da177e4 LT |
1018 | |
1019 | if (!skb->data_len) | |
1020 | goto done; | |
1021 | ||
1022 | /* Don't forget the fragments. */ | |
1023 | for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) { | |
1024 | /* NOTE: skb_shinfos are recursive. Although IP returns | |
1025 | * skb's with only 1 level of fragments, SCTP reassembly can | |
1026 | * increase the levels. | |
1027 | */ | |
d7c2c9e3 | 1028 | sctp_ulpevent_release_frag_data(sctp_skb2event(frag)); |
1da177e4 LT |
1029 | } |
1030 | ||
1031 | done: | |
1032 | sctp_ulpevent_release_owner(event); | |
1033 | } | |
1034 | ||
1035 | /* Free a ulpevent that has an owner. It includes releasing the reference | |
1036 | * to the owner, updating the rwnd in case of a DATA event and freeing the | |
1037 | * skb. | |
1da177e4 LT |
1038 | */ |
1039 | void sctp_ulpevent_free(struct sctp_ulpevent *event) | |
1040 | { | |
1041 | if (sctp_ulpevent_is_notification(event)) | |
1042 | sctp_ulpevent_release_owner(event); | |
1043 | else | |
1044 | sctp_ulpevent_release_data(event); | |
1045 | ||
1046 | kfree_skb(sctp_event2skb(event)); | |
1047 | } | |
1048 | ||
1049 | /* Purge the skb lists holding ulpevents. */ | |
1050 | void sctp_queue_purge_ulpevents(struct sk_buff_head *list) | |
1051 | { | |
1052 | struct sk_buff *skb; | |
1053 | while ((skb = skb_dequeue(list)) != NULL) | |
1054 | sctp_ulpevent_free(sctp_skb2event(skb)); | |
1055 | } |