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a8386317 XL |
1 | /* SCTP kernel implementation |
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 | * | |
7 | * This file is part of the SCTP kernel implementation | |
8 | * | |
9 | * These functions manipulate sctp tsn mapping array. | |
10 | * | |
11 | * This SCTP implementation is free software; | |
12 | * you can redistribute it and/or modify it under the terms of | |
13 | * the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This SCTP implementation is distributed in the hope that it | |
18 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied | |
19 | * ************************ | |
20 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
21 | * See the GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with GNU CC; see the file COPYING. If not, see | |
25 | * <http://www.gnu.org/licenses/>. | |
26 | * | |
27 | * Please send any bug reports or fixes you make to the | |
28 | * email address(es): | |
29 | * lksctp developers <linux-sctp@vger.kernel.org> | |
30 | * | |
31 | * Written or modified by: | |
32 | * Xin Long <lucien.xin@gmail.com> | |
33 | */ | |
34 | ||
5bbbbe32 | 35 | #include <linux/list.h> |
a8386317 | 36 | #include <net/sctp/sctp.h> |
7f9d68ac | 37 | #include <net/sctp/sm.h> |
5bbbbe32 MRL |
38 | #include <net/sctp/stream_sched.h> |
39 | ||
40 | /* Migrates chunks from stream queues to new stream queues if needed, | |
41 | * but not across associations. Also, removes those chunks to streams | |
42 | * higher than the new max. | |
43 | */ | |
44 | static void sctp_stream_outq_migrate(struct sctp_stream *stream, | |
45 | struct sctp_stream *new, __u16 outcnt) | |
46 | { | |
47 | struct sctp_association *asoc; | |
48 | struct sctp_chunk *ch, *temp; | |
49 | struct sctp_outq *outq; | |
50 | int i; | |
51 | ||
52 | asoc = container_of(stream, struct sctp_association, stream); | |
53 | outq = &asoc->outqueue; | |
54 | ||
55 | list_for_each_entry_safe(ch, temp, &outq->out_chunk_list, list) { | |
56 | __u16 sid = sctp_chunk_stream_no(ch); | |
57 | ||
58 | if (sid < outcnt) | |
59 | continue; | |
60 | ||
61 | sctp_sched_dequeue_common(outq, ch); | |
62 | /* No need to call dequeue_done here because | |
63 | * the chunks are not scheduled by now. | |
64 | */ | |
65 | ||
66 | /* Mark as failed send. */ | |
08f46070 | 67 | sctp_chunk_fail(ch, (__force __u32)SCTP_ERROR_INV_STRM); |
5bbbbe32 MRL |
68 | if (asoc->peer.prsctp_capable && |
69 | SCTP_PR_PRIO_ENABLED(ch->sinfo.sinfo_flags)) | |
70 | asoc->sent_cnt_removable--; | |
71 | ||
72 | sctp_chunk_free(ch); | |
73 | } | |
74 | ||
75 | if (new) { | |
76 | /* Here we actually move the old ext stuff into the new | |
77 | * buffer, because we want to keep it. Then | |
78 | * sctp_stream_update will swap ->out pointers. | |
79 | */ | |
80 | for (i = 0; i < outcnt; i++) { | |
81 | kfree(new->out[i].ext); | |
82 | new->out[i].ext = stream->out[i].ext; | |
83 | stream->out[i].ext = NULL; | |
84 | } | |
85 | } | |
86 | ||
87 | for (i = outcnt; i < stream->outcnt; i++) | |
88 | kfree(stream->out[i].ext); | |
89 | } | |
a8386317 | 90 | |
e090abd0 MRL |
91 | static int sctp_stream_alloc_out(struct sctp_stream *stream, __u16 outcnt, |
92 | gfp_t gfp) | |
93 | { | |
94 | struct sctp_stream_out *out; | |
95 | ||
96 | out = kmalloc_array(outcnt, sizeof(*out), gfp); | |
97 | if (!out) | |
98 | return -ENOMEM; | |
99 | ||
100 | if (stream->out) { | |
101 | memcpy(out, stream->out, min(outcnt, stream->outcnt) * | |
102 | sizeof(*out)); | |
103 | kfree(stream->out); | |
104 | } | |
105 | ||
106 | if (outcnt > stream->outcnt) | |
107 | memset(out + stream->outcnt, 0, | |
108 | (outcnt - stream->outcnt) * sizeof(*out)); | |
109 | ||
110 | stream->out = out; | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
1fdb8d8f MRL |
115 | static int sctp_stream_alloc_in(struct sctp_stream *stream, __u16 incnt, |
116 | gfp_t gfp) | |
117 | { | |
118 | struct sctp_stream_in *in; | |
119 | ||
120 | in = kmalloc_array(incnt, sizeof(*stream->in), gfp); | |
121 | ||
122 | if (!in) | |
123 | return -ENOMEM; | |
124 | ||
125 | if (stream->in) { | |
126 | memcpy(in, stream->in, min(incnt, stream->incnt) * | |
127 | sizeof(*in)); | |
128 | kfree(stream->in); | |
129 | } | |
130 | ||
131 | if (incnt > stream->incnt) | |
132 | memset(in + stream->incnt, 0, | |
133 | (incnt - stream->incnt) * sizeof(*in)); | |
134 | ||
135 | stream->in = in; | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
ff356414 XL |
140 | int sctp_stream_init(struct sctp_stream *stream, __u16 outcnt, __u16 incnt, |
141 | gfp_t gfp) | |
a8386317 | 142 | { |
5bbbbe32 MRL |
143 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
144 | int i, ret = 0; | |
3dbcc105 | 145 | |
1ae2eaaa MRL |
146 | gfp |= __GFP_NOWARN; |
147 | ||
3dbcc105 | 148 | /* Initial stream->out size may be very big, so free it and alloc |
1ae2eaaa | 149 | * a new one with new outcnt to save memory if needed. |
3dbcc105 | 150 | */ |
1ae2eaaa MRL |
151 | if (outcnt == stream->outcnt) |
152 | goto in; | |
153 | ||
5bbbbe32 MRL |
154 | /* Filter out chunks queued on streams that won't exist anymore */ |
155 | sched->unsched_all(stream); | |
156 | sctp_stream_outq_migrate(stream, NULL, outcnt); | |
157 | sched->sched_all(stream); | |
158 | ||
79d08951 MRL |
159 | ret = sctp_stream_alloc_out(stream, outcnt, gfp); |
160 | if (ret) | |
161 | goto out; | |
3dbcc105 | 162 | |
ff356414 | 163 | stream->outcnt = outcnt; |
3dbcc105 XL |
164 | for (i = 0; i < stream->outcnt; i++) |
165 | stream->out[i].state = SCTP_STREAM_OPEN; | |
166 | ||
5bbbbe32 MRL |
167 | sched->init(stream); |
168 | ||
1ae2eaaa | 169 | in: |
ff356414 | 170 | if (!incnt) |
5bbbbe32 | 171 | goto out; |
ff356414 | 172 | |
79d08951 MRL |
173 | ret = sctp_stream_alloc_in(stream, incnt, gfp); |
174 | if (ret) { | |
175 | sched->free(stream); | |
176 | kfree(stream->out); | |
177 | stream->out = NULL; | |
178 | stream->outcnt = 0; | |
179 | goto out; | |
a8386317 XL |
180 | } |
181 | ||
ff356414 XL |
182 | stream->incnt = incnt; |
183 | ||
5bbbbe32 MRL |
184 | out: |
185 | return ret; | |
a8386317 XL |
186 | } |
187 | ||
f952be79 MRL |
188 | int sctp_stream_init_ext(struct sctp_stream *stream, __u16 sid) |
189 | { | |
190 | struct sctp_stream_out_ext *soute; | |
191 | ||
192 | soute = kzalloc(sizeof(*soute), GFP_KERNEL); | |
193 | if (!soute) | |
194 | return -ENOMEM; | |
195 | stream->out[sid].ext = soute; | |
196 | ||
5bbbbe32 | 197 | return sctp_sched_init_sid(stream, sid, GFP_KERNEL); |
f952be79 MRL |
198 | } |
199 | ||
a8386317 XL |
200 | void sctp_stream_free(struct sctp_stream *stream) |
201 | { | |
5bbbbe32 | 202 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
f952be79 MRL |
203 | int i; |
204 | ||
5bbbbe32 | 205 | sched->free(stream); |
f952be79 MRL |
206 | for (i = 0; i < stream->outcnt; i++) |
207 | kfree(stream->out[i].ext); | |
a8386317 XL |
208 | kfree(stream->out); |
209 | kfree(stream->in); | |
a8386317 XL |
210 | } |
211 | ||
212 | void sctp_stream_clear(struct sctp_stream *stream) | |
213 | { | |
214 | int i; | |
215 | ||
216 | for (i = 0; i < stream->outcnt; i++) | |
217 | stream->out[i].ssn = 0; | |
218 | ||
219 | for (i = 0; i < stream->incnt; i++) | |
220 | stream->in[i].ssn = 0; | |
221 | } | |
7f9d68ac | 222 | |
cee360ab XL |
223 | void sctp_stream_update(struct sctp_stream *stream, struct sctp_stream *new) |
224 | { | |
5bbbbe32 MRL |
225 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
226 | ||
227 | sched->unsched_all(stream); | |
228 | sctp_stream_outq_migrate(stream, new, new->outcnt); | |
cee360ab XL |
229 | sctp_stream_free(stream); |
230 | ||
231 | stream->out = new->out; | |
232 | stream->in = new->in; | |
233 | stream->outcnt = new->outcnt; | |
234 | stream->incnt = new->incnt; | |
235 | ||
5bbbbe32 MRL |
236 | sched->sched_all(stream); |
237 | ||
cee360ab XL |
238 | new->out = NULL; |
239 | new->in = NULL; | |
240 | } | |
241 | ||
7f9d68ac XL |
242 | static int sctp_send_reconf(struct sctp_association *asoc, |
243 | struct sctp_chunk *chunk) | |
244 | { | |
245 | struct net *net = sock_net(asoc->base.sk); | |
246 | int retval = 0; | |
247 | ||
248 | retval = sctp_primitive_RECONF(net, asoc, chunk); | |
249 | if (retval) | |
250 | sctp_chunk_free(chunk); | |
251 | ||
252 | return retval; | |
253 | } | |
254 | ||
d570a59c XL |
255 | static bool sctp_stream_outq_is_empty(struct sctp_stream *stream, |
256 | __u16 str_nums, __be16 *str_list) | |
257 | { | |
258 | struct sctp_association *asoc; | |
259 | __u16 i; | |
260 | ||
261 | asoc = container_of(stream, struct sctp_association, stream); | |
262 | if (!asoc->outqueue.out_qlen) | |
263 | return true; | |
264 | ||
265 | if (!str_nums) | |
266 | return false; | |
267 | ||
268 | for (i = 0; i < str_nums; i++) { | |
269 | __u16 sid = ntohs(str_list[i]); | |
270 | ||
271 | if (stream->out[sid].ext && | |
272 | !list_empty(&stream->out[sid].ext->outq)) | |
273 | return false; | |
274 | } | |
275 | ||
276 | return true; | |
277 | } | |
278 | ||
7f9d68ac XL |
279 | int sctp_send_reset_streams(struct sctp_association *asoc, |
280 | struct sctp_reset_streams *params) | |
281 | { | |
cee360ab | 282 | struct sctp_stream *stream = &asoc->stream; |
7f9d68ac XL |
283 | __u16 i, str_nums, *str_list; |
284 | struct sctp_chunk *chunk; | |
285 | int retval = -EINVAL; | |
1da4fc97 | 286 | __be16 *nstr_list; |
7f9d68ac XL |
287 | bool out, in; |
288 | ||
289 | if (!asoc->peer.reconf_capable || | |
290 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) { | |
291 | retval = -ENOPROTOOPT; | |
292 | goto out; | |
293 | } | |
294 | ||
295 | if (asoc->strreset_outstanding) { | |
296 | retval = -EINPROGRESS; | |
297 | goto out; | |
298 | } | |
299 | ||
300 | out = params->srs_flags & SCTP_STREAM_RESET_OUTGOING; | |
301 | in = params->srs_flags & SCTP_STREAM_RESET_INCOMING; | |
302 | if (!out && !in) | |
303 | goto out; | |
304 | ||
305 | str_nums = params->srs_number_streams; | |
306 | str_list = params->srs_stream_list; | |
423852f8 XL |
307 | if (str_nums) { |
308 | int param_len = 0; | |
309 | ||
310 | if (out) { | |
311 | for (i = 0; i < str_nums; i++) | |
312 | if (str_list[i] >= stream->outcnt) | |
313 | goto out; | |
314 | ||
315 | param_len = str_nums * sizeof(__u16) + | |
316 | sizeof(struct sctp_strreset_outreq); | |
317 | } | |
318 | ||
319 | if (in) { | |
320 | for (i = 0; i < str_nums; i++) | |
321 | if (str_list[i] >= stream->incnt) | |
322 | goto out; | |
323 | ||
324 | param_len += str_nums * sizeof(__u16) + | |
325 | sizeof(struct sctp_strreset_inreq); | |
326 | } | |
327 | ||
328 | if (param_len > SCTP_MAX_CHUNK_LEN - | |
329 | sizeof(struct sctp_reconf_chunk)) | |
330 | goto out; | |
331 | } | |
7f9d68ac | 332 | |
1da4fc97 XL |
333 | nstr_list = kcalloc(str_nums, sizeof(__be16), GFP_KERNEL); |
334 | if (!nstr_list) { | |
335 | retval = -ENOMEM; | |
336 | goto out; | |
337 | } | |
338 | ||
16e1a919 | 339 | for (i = 0; i < str_nums; i++) |
1da4fc97 | 340 | nstr_list[i] = htons(str_list[i]); |
16e1a919 | 341 | |
d570a59c XL |
342 | if (out && !sctp_stream_outq_is_empty(stream, str_nums, nstr_list)) { |
343 | retval = -EAGAIN; | |
344 | goto out; | |
345 | } | |
346 | ||
1da4fc97 | 347 | chunk = sctp_make_strreset_req(asoc, str_nums, nstr_list, out, in); |
16e1a919 | 348 | |
1da4fc97 | 349 | kfree(nstr_list); |
16e1a919 | 350 | |
119aecba XL |
351 | if (!chunk) { |
352 | retval = -ENOMEM; | |
7f9d68ac | 353 | goto out; |
119aecba | 354 | } |
7f9d68ac XL |
355 | |
356 | if (out) { | |
357 | if (str_nums) | |
358 | for (i = 0; i < str_nums; i++) | |
359 | stream->out[str_list[i]].state = | |
360 | SCTP_STREAM_CLOSED; | |
361 | else | |
362 | for (i = 0; i < stream->outcnt; i++) | |
363 | stream->out[i].state = SCTP_STREAM_CLOSED; | |
364 | } | |
365 | ||
7f9d68ac XL |
366 | asoc->strreset_chunk = chunk; |
367 | sctp_chunk_hold(asoc->strreset_chunk); | |
368 | ||
369 | retval = sctp_send_reconf(asoc, chunk); | |
370 | if (retval) { | |
371 | sctp_chunk_put(asoc->strreset_chunk); | |
372 | asoc->strreset_chunk = NULL; | |
119aecba XL |
373 | if (!out) |
374 | goto out; | |
375 | ||
376 | if (str_nums) | |
377 | for (i = 0; i < str_nums; i++) | |
378 | stream->out[str_list[i]].state = | |
379 | SCTP_STREAM_OPEN; | |
380 | else | |
381 | for (i = 0; i < stream->outcnt; i++) | |
382 | stream->out[i].state = SCTP_STREAM_OPEN; | |
383 | ||
384 | goto out; | |
7f9d68ac XL |
385 | } |
386 | ||
119aecba XL |
387 | asoc->strreset_outstanding = out + in; |
388 | ||
7f9d68ac XL |
389 | out: |
390 | return retval; | |
391 | } | |
a92ce1a4 XL |
392 | |
393 | int sctp_send_reset_assoc(struct sctp_association *asoc) | |
394 | { | |
cee360ab | 395 | struct sctp_stream *stream = &asoc->stream; |
a92ce1a4 XL |
396 | struct sctp_chunk *chunk = NULL; |
397 | int retval; | |
398 | __u16 i; | |
399 | ||
400 | if (!asoc->peer.reconf_capable || | |
401 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
402 | return -ENOPROTOOPT; | |
403 | ||
404 | if (asoc->strreset_outstanding) | |
405 | return -EINPROGRESS; | |
406 | ||
5c6144a0 XL |
407 | if (!sctp_outq_is_empty(&asoc->outqueue)) |
408 | return -EAGAIN; | |
409 | ||
a92ce1a4 XL |
410 | chunk = sctp_make_strreset_tsnreq(asoc); |
411 | if (!chunk) | |
412 | return -ENOMEM; | |
413 | ||
414 | /* Block further xmit of data until this request is completed */ | |
cee360ab XL |
415 | for (i = 0; i < stream->outcnt; i++) |
416 | stream->out[i].state = SCTP_STREAM_CLOSED; | |
a92ce1a4 XL |
417 | |
418 | asoc->strreset_chunk = chunk; | |
419 | sctp_chunk_hold(asoc->strreset_chunk); | |
420 | ||
421 | retval = sctp_send_reconf(asoc, chunk); | |
422 | if (retval) { | |
423 | sctp_chunk_put(asoc->strreset_chunk); | |
424 | asoc->strreset_chunk = NULL; | |
425 | ||
cee360ab XL |
426 | for (i = 0; i < stream->outcnt; i++) |
427 | stream->out[i].state = SCTP_STREAM_OPEN; | |
a92ce1a4 XL |
428 | |
429 | return retval; | |
430 | } | |
431 | ||
432 | asoc->strreset_outstanding = 1; | |
433 | ||
434 | return 0; | |
435 | } | |
242bd2d5 XL |
436 | |
437 | int sctp_send_add_streams(struct sctp_association *asoc, | |
438 | struct sctp_add_streams *params) | |
439 | { | |
cee360ab | 440 | struct sctp_stream *stream = &asoc->stream; |
242bd2d5 | 441 | struct sctp_chunk *chunk = NULL; |
dc82673f | 442 | int retval; |
242bd2d5 XL |
443 | __u32 outcnt, incnt; |
444 | __u16 out, in; | |
445 | ||
446 | if (!asoc->peer.reconf_capable || | |
447 | !(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) { | |
448 | retval = -ENOPROTOOPT; | |
449 | goto out; | |
450 | } | |
451 | ||
452 | if (asoc->strreset_outstanding) { | |
453 | retval = -EINPROGRESS; | |
454 | goto out; | |
455 | } | |
456 | ||
457 | out = params->sas_outstrms; | |
458 | in = params->sas_instrms; | |
459 | outcnt = stream->outcnt + out; | |
460 | incnt = stream->incnt + in; | |
461 | if (outcnt > SCTP_MAX_STREAM || incnt > SCTP_MAX_STREAM || | |
462 | (!out && !in)) { | |
463 | retval = -EINVAL; | |
464 | goto out; | |
465 | } | |
466 | ||
467 | if (out) { | |
e090abd0 MRL |
468 | retval = sctp_stream_alloc_out(stream, outcnt, GFP_KERNEL); |
469 | if (retval) | |
242bd2d5 | 470 | goto out; |
242bd2d5 XL |
471 | } |
472 | ||
242bd2d5 | 473 | chunk = sctp_make_strreset_addstrm(asoc, out, in); |
dc82673f WY |
474 | if (!chunk) { |
475 | retval = -ENOMEM; | |
242bd2d5 | 476 | goto out; |
dc82673f | 477 | } |
242bd2d5 XL |
478 | |
479 | asoc->strreset_chunk = chunk; | |
480 | sctp_chunk_hold(asoc->strreset_chunk); | |
481 | ||
482 | retval = sctp_send_reconf(asoc, chunk); | |
483 | if (retval) { | |
484 | sctp_chunk_put(asoc->strreset_chunk); | |
485 | asoc->strreset_chunk = NULL; | |
486 | goto out; | |
487 | } | |
488 | ||
489 | stream->incnt = incnt; | |
490 | stream->outcnt = outcnt; | |
491 | ||
492 | asoc->strreset_outstanding = !!out + !!in; | |
493 | ||
494 | out: | |
495 | return retval; | |
496 | } | |
81054476 | 497 | |
3c918704 | 498 | static struct sctp_paramhdr *sctp_chunk_lookup_strreset_param( |
1da4fc97 | 499 | struct sctp_association *asoc, __be32 resp_seq, |
50a41591 | 500 | __be16 type) |
81054476 XL |
501 | { |
502 | struct sctp_chunk *chunk = asoc->strreset_chunk; | |
503 | struct sctp_reconf_chunk *hdr; | |
504 | union sctp_params param; | |
505 | ||
50a41591 | 506 | if (!chunk) |
81054476 XL |
507 | return NULL; |
508 | ||
509 | hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr; | |
510 | sctp_walk_params(param, hdr, params) { | |
511 | /* sctp_strreset_tsnreq is actually the basic structure | |
512 | * of all stream reconf params, so it's safe to use it | |
513 | * to access request_seq. | |
514 | */ | |
515 | struct sctp_strreset_tsnreq *req = param.v; | |
516 | ||
50a41591 XL |
517 | if ((!resp_seq || req->request_seq == resp_seq) && |
518 | (!type || type == req->param_hdr.type)) | |
81054476 XL |
519 | return param.v; |
520 | } | |
521 | ||
522 | return NULL; | |
523 | } | |
524 | ||
e4dc99c7 XL |
525 | static void sctp_update_strreset_result(struct sctp_association *asoc, |
526 | __u32 result) | |
527 | { | |
528 | asoc->strreset_result[1] = asoc->strreset_result[0]; | |
529 | asoc->strreset_result[0] = result; | |
530 | } | |
531 | ||
81054476 XL |
532 | struct sctp_chunk *sctp_process_strreset_outreq( |
533 | struct sctp_association *asoc, | |
534 | union sctp_params param, | |
535 | struct sctp_ulpevent **evp) | |
536 | { | |
537 | struct sctp_strreset_outreq *outreq = param.v; | |
cee360ab | 538 | struct sctp_stream *stream = &asoc->stream; |
81054476 | 539 | __u32 result = SCTP_STRRESET_DENIED; |
1da4fc97 XL |
540 | __u16 i, nums, flags = 0; |
541 | __be16 *str_p = NULL; | |
81054476 XL |
542 | __u32 request_seq; |
543 | ||
544 | request_seq = ntohl(outreq->request_seq); | |
545 | ||
546 | if (ntohl(outreq->send_reset_at_tsn) > | |
547 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map)) { | |
548 | result = SCTP_STRRESET_IN_PROGRESS; | |
e4dc99c7 | 549 | goto err; |
81054476 XL |
550 | } |
551 | ||
e4dc99c7 XL |
552 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
553 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
81054476 | 554 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
555 | goto err; |
556 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
557 | i = asoc->strreset_inseq - request_seq - 1; | |
558 | result = asoc->strreset_result[i]; | |
559 | goto err; | |
81054476 | 560 | } |
e4dc99c7 | 561 | asoc->strreset_inseq++; |
81054476 XL |
562 | |
563 | /* Check strreset_enable after inseq inc, as sender cannot tell | |
564 | * the peer doesn't enable strreset after receiving response with | |
565 | * result denied, as well as to keep consistent with bsd. | |
566 | */ | |
567 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
568 | goto out; | |
569 | ||
570 | if (asoc->strreset_chunk) { | |
50a41591 XL |
571 | if (!sctp_chunk_lookup_strreset_param( |
572 | asoc, outreq->response_seq, | |
573 | SCTP_PARAM_RESET_IN_REQUEST)) { | |
81054476 XL |
574 | /* same process with outstanding isn't 0 */ |
575 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
576 | goto out; | |
577 | } | |
578 | ||
579 | asoc->strreset_outstanding--; | |
580 | asoc->strreset_outseq++; | |
581 | ||
582 | if (!asoc->strreset_outstanding) { | |
50a41591 XL |
583 | struct sctp_transport *t; |
584 | ||
81054476 XL |
585 | t = asoc->strreset_chunk->transport; |
586 | if (del_timer(&t->reconf_timer)) | |
587 | sctp_transport_put(t); | |
588 | ||
589 | sctp_chunk_put(asoc->strreset_chunk); | |
590 | asoc->strreset_chunk = NULL; | |
591 | } | |
592 | ||
593 | flags = SCTP_STREAM_RESET_INCOMING_SSN; | |
594 | } | |
595 | ||
3aa623da | 596 | nums = (ntohs(param.p->length) - sizeof(*outreq)) / sizeof(__u16); |
81054476 XL |
597 | if (nums) { |
598 | str_p = outreq->list_of_streams; | |
599 | for (i = 0; i < nums; i++) { | |
600 | if (ntohs(str_p[i]) >= stream->incnt) { | |
601 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
602 | goto out; | |
603 | } | |
604 | } | |
605 | ||
606 | for (i = 0; i < nums; i++) | |
607 | stream->in[ntohs(str_p[i])].ssn = 0; | |
608 | } else { | |
609 | for (i = 0; i < stream->incnt; i++) | |
610 | stream->in[i].ssn = 0; | |
611 | } | |
612 | ||
613 | result = SCTP_STRRESET_PERFORMED; | |
614 | ||
615 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, | |
616 | flags | SCTP_STREAM_RESET_OUTGOING_SSN, nums, str_p, | |
617 | GFP_ATOMIC); | |
618 | ||
619 | out: | |
e4dc99c7 XL |
620 | sctp_update_strreset_result(asoc, result); |
621 | err: | |
81054476 XL |
622 | return sctp_make_strreset_resp(asoc, result, request_seq); |
623 | } | |
16e1a919 XL |
624 | |
625 | struct sctp_chunk *sctp_process_strreset_inreq( | |
626 | struct sctp_association *asoc, | |
627 | union sctp_params param, | |
628 | struct sctp_ulpevent **evp) | |
629 | { | |
630 | struct sctp_strreset_inreq *inreq = param.v; | |
cee360ab | 631 | struct sctp_stream *stream = &asoc->stream; |
16e1a919 XL |
632 | __u32 result = SCTP_STRRESET_DENIED; |
633 | struct sctp_chunk *chunk = NULL; | |
16e1a919 | 634 | __u32 request_seq; |
1da4fc97 XL |
635 | __u16 i, nums; |
636 | __be16 *str_p; | |
16e1a919 XL |
637 | |
638 | request_seq = ntohl(inreq->request_seq); | |
d0f025e6 XL |
639 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
640 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
16e1a919 | 641 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
642 | goto err; |
643 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
644 | i = asoc->strreset_inseq - request_seq - 1; | |
645 | result = asoc->strreset_result[i]; | |
646 | if (result == SCTP_STRRESET_PERFORMED) | |
647 | return NULL; | |
648 | goto err; | |
16e1a919 | 649 | } |
d0f025e6 | 650 | asoc->strreset_inseq++; |
16e1a919 XL |
651 | |
652 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
653 | goto out; | |
654 | ||
655 | if (asoc->strreset_outstanding) { | |
656 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
657 | goto out; | |
658 | } | |
659 | ||
3aa623da | 660 | nums = (ntohs(param.p->length) - sizeof(*inreq)) / sizeof(__u16); |
16e1a919 XL |
661 | str_p = inreq->list_of_streams; |
662 | for (i = 0; i < nums; i++) { | |
663 | if (ntohs(str_p[i]) >= stream->outcnt) { | |
664 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
665 | goto out; | |
666 | } | |
667 | } | |
668 | ||
d570a59c XL |
669 | if (!sctp_stream_outq_is_empty(stream, nums, str_p)) { |
670 | result = SCTP_STRRESET_IN_PROGRESS; | |
671 | asoc->strreset_inseq--; | |
672 | goto err; | |
673 | } | |
674 | ||
16e1a919 XL |
675 | chunk = sctp_make_strreset_req(asoc, nums, str_p, 1, 0); |
676 | if (!chunk) | |
677 | goto out; | |
678 | ||
679 | if (nums) | |
680 | for (i = 0; i < nums; i++) | |
681 | stream->out[ntohs(str_p[i])].state = | |
682 | SCTP_STREAM_CLOSED; | |
683 | else | |
684 | for (i = 0; i < stream->outcnt; i++) | |
685 | stream->out[i].state = SCTP_STREAM_CLOSED; | |
686 | ||
687 | asoc->strreset_chunk = chunk; | |
688 | asoc->strreset_outstanding = 1; | |
689 | sctp_chunk_hold(asoc->strreset_chunk); | |
690 | ||
d0f025e6 XL |
691 | result = SCTP_STRRESET_PERFORMED; |
692 | ||
16e1a919 XL |
693 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, |
694 | SCTP_STREAM_RESET_INCOMING_SSN, nums, str_p, GFP_ATOMIC); | |
695 | ||
696 | out: | |
d0f025e6 XL |
697 | sctp_update_strreset_result(asoc, result); |
698 | err: | |
16e1a919 XL |
699 | if (!chunk) |
700 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
701 | ||
702 | return chunk; | |
703 | } | |
692787ce XL |
704 | |
705 | struct sctp_chunk *sctp_process_strreset_tsnreq( | |
706 | struct sctp_association *asoc, | |
707 | union sctp_params param, | |
708 | struct sctp_ulpevent **evp) | |
709 | { | |
710 | __u32 init_tsn = 0, next_tsn = 0, max_tsn_seen; | |
711 | struct sctp_strreset_tsnreq *tsnreq = param.v; | |
cee360ab | 712 | struct sctp_stream *stream = &asoc->stream; |
692787ce XL |
713 | __u32 result = SCTP_STRRESET_DENIED; |
714 | __u32 request_seq; | |
715 | __u16 i; | |
716 | ||
717 | request_seq = ntohl(tsnreq->request_seq); | |
6c801387 XL |
718 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
719 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
692787ce | 720 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
6c801387 XL |
721 | goto err; |
722 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
723 | i = asoc->strreset_inseq - request_seq - 1; | |
724 | result = asoc->strreset_result[i]; | |
725 | if (result == SCTP_STRRESET_PERFORMED) { | |
52a39589 | 726 | next_tsn = asoc->ctsn_ack_point + 1; |
6c801387 XL |
727 | init_tsn = |
728 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + 1; | |
729 | } | |
730 | goto err; | |
692787ce | 731 | } |
5c6144a0 XL |
732 | |
733 | if (!sctp_outq_is_empty(&asoc->outqueue)) { | |
734 | result = SCTP_STRRESET_IN_PROGRESS; | |
735 | goto err; | |
736 | } | |
737 | ||
6c801387 | 738 | asoc->strreset_inseq++; |
692787ce XL |
739 | |
740 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
741 | goto out; | |
742 | ||
743 | if (asoc->strreset_outstanding) { | |
744 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
745 | goto out; | |
746 | } | |
747 | ||
159f2a74 XL |
748 | /* G4: The same processing as though a FWD-TSN chunk (as defined in |
749 | * [RFC3758]) with all streams affected and a new cumulative TSN | |
750 | * ACK of the Receiver's Next TSN minus 1 were received MUST be | |
751 | * performed. | |
692787ce XL |
752 | */ |
753 | max_tsn_seen = sctp_tsnmap_get_max_tsn_seen(&asoc->peer.tsn_map); | |
754 | sctp_ulpq_reasm_flushtsn(&asoc->ulpq, max_tsn_seen); | |
755 | sctp_ulpq_abort_pd(&asoc->ulpq, GFP_ATOMIC); | |
756 | ||
757 | /* G1: Compute an appropriate value for the Receiver's Next TSN -- the | |
758 | * TSN that the peer should use to send the next DATA chunk. The | |
759 | * value SHOULD be the smallest TSN not acknowledged by the | |
760 | * receiver of the request plus 2^31. | |
761 | */ | |
762 | init_tsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + (1 << 31); | |
763 | sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_INITIAL, | |
764 | init_tsn, GFP_ATOMIC); | |
765 | ||
159f2a74 XL |
766 | /* G3: The same processing as though a SACK chunk with no gap report |
767 | * and a cumulative TSN ACK of the Sender's Next TSN minus 1 were | |
768 | * received MUST be performed. | |
692787ce XL |
769 | */ |
770 | sctp_outq_free(&asoc->outqueue); | |
771 | ||
772 | /* G2: Compute an appropriate value for the local endpoint's next TSN, | |
773 | * i.e., the next TSN assigned by the receiver of the SSN/TSN reset | |
774 | * chunk. The value SHOULD be the highest TSN sent by the receiver | |
775 | * of the request plus 1. | |
776 | */ | |
777 | next_tsn = asoc->next_tsn; | |
778 | asoc->ctsn_ack_point = next_tsn - 1; | |
779 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
780 | ||
781 | /* G5: The next expected and outgoing SSNs MUST be reset to 0 for all | |
782 | * incoming and outgoing streams. | |
783 | */ | |
784 | for (i = 0; i < stream->outcnt; i++) | |
785 | stream->out[i].ssn = 0; | |
786 | for (i = 0; i < stream->incnt; i++) | |
787 | stream->in[i].ssn = 0; | |
788 | ||
789 | result = SCTP_STRRESET_PERFORMED; | |
790 | ||
791 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, 0, init_tsn, | |
792 | next_tsn, GFP_ATOMIC); | |
793 | ||
794 | out: | |
6c801387 XL |
795 | sctp_update_strreset_result(asoc, result); |
796 | err: | |
692787ce XL |
797 | return sctp_make_strreset_tsnresp(asoc, result, request_seq, |
798 | next_tsn, init_tsn); | |
799 | } | |
50a41591 XL |
800 | |
801 | struct sctp_chunk *sctp_process_strreset_addstrm_out( | |
802 | struct sctp_association *asoc, | |
803 | union sctp_params param, | |
804 | struct sctp_ulpevent **evp) | |
805 | { | |
806 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 807 | struct sctp_stream *stream = &asoc->stream; |
50a41591 | 808 | __u32 result = SCTP_STRRESET_DENIED; |
50a41591 | 809 | __u32 request_seq, incnt; |
e4dc99c7 | 810 | __u16 in, i; |
50a41591 XL |
811 | |
812 | request_seq = ntohl(addstrm->request_seq); | |
e4dc99c7 XL |
813 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
814 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
50a41591 | 815 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
816 | goto err; |
817 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
818 | i = asoc->strreset_inseq - request_seq - 1; | |
819 | result = asoc->strreset_result[i]; | |
820 | goto err; | |
50a41591 | 821 | } |
e4dc99c7 | 822 | asoc->strreset_inseq++; |
50a41591 XL |
823 | |
824 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
825 | goto out; | |
826 | ||
827 | if (asoc->strreset_chunk) { | |
828 | if (!sctp_chunk_lookup_strreset_param( | |
829 | asoc, 0, SCTP_PARAM_RESET_ADD_IN_STREAMS)) { | |
830 | /* same process with outstanding isn't 0 */ | |
831 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
832 | goto out; | |
833 | } | |
834 | ||
835 | asoc->strreset_outstanding--; | |
836 | asoc->strreset_outseq++; | |
837 | ||
838 | if (!asoc->strreset_outstanding) { | |
839 | struct sctp_transport *t; | |
840 | ||
841 | t = asoc->strreset_chunk->transport; | |
842 | if (del_timer(&t->reconf_timer)) | |
843 | sctp_transport_put(t); | |
844 | ||
845 | sctp_chunk_put(asoc->strreset_chunk); | |
846 | asoc->strreset_chunk = NULL; | |
847 | } | |
848 | } | |
849 | ||
850 | in = ntohs(addstrm->number_of_streams); | |
851 | incnt = stream->incnt + in; | |
852 | if (!in || incnt > SCTP_MAX_STREAM) | |
853 | goto out; | |
854 | ||
1fdb8d8f | 855 | if (sctp_stream_alloc_in(stream, incnt, GFP_ATOMIC)) |
50a41591 XL |
856 | goto out; |
857 | ||
50a41591 XL |
858 | stream->incnt = incnt; |
859 | ||
860 | result = SCTP_STRRESET_PERFORMED; | |
861 | ||
862 | *evp = sctp_ulpevent_make_stream_change_event(asoc, | |
863 | 0, ntohs(addstrm->number_of_streams), 0, GFP_ATOMIC); | |
864 | ||
865 | out: | |
e4dc99c7 XL |
866 | sctp_update_strreset_result(asoc, result); |
867 | err: | |
50a41591 XL |
868 | return sctp_make_strreset_resp(asoc, result, request_seq); |
869 | } | |
c5c4ebb3 XL |
870 | |
871 | struct sctp_chunk *sctp_process_strreset_addstrm_in( | |
872 | struct sctp_association *asoc, | |
873 | union sctp_params param, | |
874 | struct sctp_ulpevent **evp) | |
875 | { | |
876 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 877 | struct sctp_stream *stream = &asoc->stream; |
c5c4ebb3 | 878 | __u32 result = SCTP_STRRESET_DENIED; |
c5c4ebb3 XL |
879 | struct sctp_chunk *chunk = NULL; |
880 | __u32 request_seq, outcnt; | |
d0f025e6 | 881 | __u16 out, i; |
e090abd0 | 882 | int ret; |
c5c4ebb3 XL |
883 | |
884 | request_seq = ntohl(addstrm->request_seq); | |
d0f025e6 XL |
885 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
886 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
c5c4ebb3 | 887 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
888 | goto err; |
889 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
890 | i = asoc->strreset_inseq - request_seq - 1; | |
891 | result = asoc->strreset_result[i]; | |
892 | if (result == SCTP_STRRESET_PERFORMED) | |
893 | return NULL; | |
894 | goto err; | |
c5c4ebb3 | 895 | } |
d0f025e6 | 896 | asoc->strreset_inseq++; |
c5c4ebb3 XL |
897 | |
898 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
899 | goto out; | |
900 | ||
901 | if (asoc->strreset_outstanding) { | |
902 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
903 | goto out; | |
904 | } | |
905 | ||
906 | out = ntohs(addstrm->number_of_streams); | |
907 | outcnt = stream->outcnt + out; | |
908 | if (!out || outcnt > SCTP_MAX_STREAM) | |
909 | goto out; | |
910 | ||
e090abd0 MRL |
911 | ret = sctp_stream_alloc_out(stream, outcnt, GFP_ATOMIC); |
912 | if (ret) | |
c5c4ebb3 XL |
913 | goto out; |
914 | ||
c5c4ebb3 XL |
915 | chunk = sctp_make_strreset_addstrm(asoc, out, 0); |
916 | if (!chunk) | |
917 | goto out; | |
918 | ||
919 | asoc->strreset_chunk = chunk; | |
920 | asoc->strreset_outstanding = 1; | |
921 | sctp_chunk_hold(asoc->strreset_chunk); | |
922 | ||
923 | stream->outcnt = outcnt; | |
924 | ||
d0f025e6 XL |
925 | result = SCTP_STRRESET_PERFORMED; |
926 | ||
c5c4ebb3 XL |
927 | *evp = sctp_ulpevent_make_stream_change_event(asoc, |
928 | 0, 0, ntohs(addstrm->number_of_streams), GFP_ATOMIC); | |
929 | ||
930 | out: | |
d0f025e6 XL |
931 | sctp_update_strreset_result(asoc, result); |
932 | err: | |
c5c4ebb3 XL |
933 | if (!chunk) |
934 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
935 | ||
936 | return chunk; | |
937 | } | |
11ae76e6 XL |
938 | |
939 | struct sctp_chunk *sctp_process_strreset_resp( | |
940 | struct sctp_association *asoc, | |
941 | union sctp_params param, | |
942 | struct sctp_ulpevent **evp) | |
943 | { | |
cee360ab | 944 | struct sctp_stream *stream = &asoc->stream; |
11ae76e6 | 945 | struct sctp_strreset_resp *resp = param.v; |
11ae76e6 XL |
946 | struct sctp_transport *t; |
947 | __u16 i, nums, flags = 0; | |
3c918704 | 948 | struct sctp_paramhdr *req; |
11ae76e6 XL |
949 | __u32 result; |
950 | ||
951 | req = sctp_chunk_lookup_strreset_param(asoc, resp->response_seq, 0); | |
952 | if (!req) | |
953 | return NULL; | |
954 | ||
955 | result = ntohl(resp->result); | |
956 | if (result != SCTP_STRRESET_PERFORMED) { | |
957 | /* if in progress, do nothing but retransmit */ | |
958 | if (result == SCTP_STRRESET_IN_PROGRESS) | |
959 | return NULL; | |
960 | else if (result == SCTP_STRRESET_DENIED) | |
961 | flags = SCTP_STREAM_RESET_DENIED; | |
962 | else | |
963 | flags = SCTP_STREAM_RESET_FAILED; | |
964 | } | |
965 | ||
966 | if (req->type == SCTP_PARAM_RESET_OUT_REQUEST) { | |
967 | struct sctp_strreset_outreq *outreq; | |
1da4fc97 | 968 | __be16 *str_p; |
11ae76e6 XL |
969 | |
970 | outreq = (struct sctp_strreset_outreq *)req; | |
edb12f2d | 971 | str_p = outreq->list_of_streams; |
3aa623da XL |
972 | nums = (ntohs(outreq->param_hdr.length) - sizeof(*outreq)) / |
973 | sizeof(__u16); | |
11ae76e6 XL |
974 | |
975 | if (result == SCTP_STRRESET_PERFORMED) { | |
976 | if (nums) { | |
11ae76e6 XL |
977 | for (i = 0; i < nums; i++) |
978 | stream->out[ntohs(str_p[i])].ssn = 0; | |
979 | } else { | |
980 | for (i = 0; i < stream->outcnt; i++) | |
981 | stream->out[i].ssn = 0; | |
982 | } | |
983 | ||
984 | flags = SCTP_STREAM_RESET_OUTGOING_SSN; | |
985 | } | |
986 | ||
987 | for (i = 0; i < stream->outcnt; i++) | |
988 | stream->out[i].state = SCTP_STREAM_OPEN; | |
989 | ||
990 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, | |
991 | nums, str_p, GFP_ATOMIC); | |
992 | } else if (req->type == SCTP_PARAM_RESET_IN_REQUEST) { | |
993 | struct sctp_strreset_inreq *inreq; | |
1da4fc97 | 994 | __be16 *str_p; |
11ae76e6 XL |
995 | |
996 | /* if the result is performed, it's impossible for inreq */ | |
997 | if (result == SCTP_STRRESET_PERFORMED) | |
998 | return NULL; | |
999 | ||
1000 | inreq = (struct sctp_strreset_inreq *)req; | |
edb12f2d | 1001 | str_p = inreq->list_of_streams; |
3aa623da XL |
1002 | nums = (ntohs(inreq->param_hdr.length) - sizeof(*inreq)) / |
1003 | sizeof(__u16); | |
11ae76e6 | 1004 | |
11ae76e6 XL |
1005 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, |
1006 | nums, str_p, GFP_ATOMIC); | |
1007 | } else if (req->type == SCTP_PARAM_RESET_TSN_REQUEST) { | |
1008 | struct sctp_strreset_resptsn *resptsn; | |
1009 | __u32 stsn, rtsn; | |
1010 | ||
1011 | /* check for resptsn, as sctp_verify_reconf didn't do it*/ | |
1012 | if (ntohs(param.p->length) != sizeof(*resptsn)) | |
1013 | return NULL; | |
1014 | ||
1015 | resptsn = (struct sctp_strreset_resptsn *)resp; | |
1016 | stsn = ntohl(resptsn->senders_next_tsn); | |
1017 | rtsn = ntohl(resptsn->receivers_next_tsn); | |
1018 | ||
1019 | if (result == SCTP_STRRESET_PERFORMED) { | |
1020 | __u32 mtsn = sctp_tsnmap_get_max_tsn_seen( | |
1021 | &asoc->peer.tsn_map); | |
159f2a74 | 1022 | LIST_HEAD(temp); |
11ae76e6 XL |
1023 | |
1024 | sctp_ulpq_reasm_flushtsn(&asoc->ulpq, mtsn); | |
1025 | sctp_ulpq_abort_pd(&asoc->ulpq, GFP_ATOMIC); | |
1026 | ||
1027 | sctp_tsnmap_init(&asoc->peer.tsn_map, | |
1028 | SCTP_TSN_MAP_INITIAL, | |
1029 | stsn, GFP_ATOMIC); | |
1030 | ||
159f2a74 XL |
1031 | /* Clean up sacked and abandoned queues only. As the |
1032 | * out_chunk_list may not be empty, splice it to temp, | |
1033 | * then get it back after sctp_outq_free is done. | |
1034 | */ | |
1035 | list_splice_init(&asoc->outqueue.out_chunk_list, &temp); | |
11ae76e6 | 1036 | sctp_outq_free(&asoc->outqueue); |
159f2a74 | 1037 | list_splice_init(&temp, &asoc->outqueue.out_chunk_list); |
11ae76e6 XL |
1038 | |
1039 | asoc->next_tsn = rtsn; | |
1040 | asoc->ctsn_ack_point = asoc->next_tsn - 1; | |
1041 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
1042 | ||
1043 | for (i = 0; i < stream->outcnt; i++) | |
1044 | stream->out[i].ssn = 0; | |
1045 | for (i = 0; i < stream->incnt; i++) | |
1046 | stream->in[i].ssn = 0; | |
1047 | } | |
1048 | ||
1049 | for (i = 0; i < stream->outcnt; i++) | |
1050 | stream->out[i].state = SCTP_STREAM_OPEN; | |
1051 | ||
1052 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, flags, | |
1053 | stsn, rtsn, GFP_ATOMIC); | |
1054 | } else if (req->type == SCTP_PARAM_RESET_ADD_OUT_STREAMS) { | |
1055 | struct sctp_strreset_addstrm *addstrm; | |
1056 | __u16 number; | |
1057 | ||
1058 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1059 | nums = ntohs(addstrm->number_of_streams); | |
1060 | number = stream->outcnt - nums; | |
1061 | ||
1062 | if (result == SCTP_STRRESET_PERFORMED) | |
1063 | for (i = number; i < stream->outcnt; i++) | |
1064 | stream->out[i].state = SCTP_STREAM_OPEN; | |
1065 | else | |
1066 | stream->outcnt = number; | |
1067 | ||
1068 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1069 | 0, nums, GFP_ATOMIC); | |
1070 | } else if (req->type == SCTP_PARAM_RESET_ADD_IN_STREAMS) { | |
1071 | struct sctp_strreset_addstrm *addstrm; | |
1072 | ||
1073 | /* if the result is performed, it's impossible for addstrm in | |
1074 | * request. | |
1075 | */ | |
1076 | if (result == SCTP_STRRESET_PERFORMED) | |
1077 | return NULL; | |
1078 | ||
1079 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1080 | nums = ntohs(addstrm->number_of_streams); | |
1081 | ||
1082 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1083 | nums, 0, GFP_ATOMIC); | |
1084 | } | |
1085 | ||
1086 | asoc->strreset_outstanding--; | |
1087 | asoc->strreset_outseq++; | |
1088 | ||
1089 | /* remove everything for this reconf request */ | |
1090 | if (!asoc->strreset_outstanding) { | |
1091 | t = asoc->strreset_chunk->transport; | |
1092 | if (del_timer(&t->reconf_timer)) | |
1093 | sctp_transport_put(t); | |
1094 | ||
1095 | sctp_chunk_put(asoc->strreset_chunk); | |
1096 | asoc->strreset_chunk = NULL; | |
1097 | } | |
1098 | ||
1099 | return NULL; | |
1100 | } |