Commit | Line | Data |
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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 | ||
e090abd0 MRL |
159 | i = sctp_stream_alloc_out(stream, outcnt, gfp); |
160 | if (i) | |
161 | return i; | |
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: |
0c3f6f65 | 170 | sctp_stream_interleave_init(stream); |
ff356414 | 171 | if (!incnt) |
5bbbbe32 | 172 | goto out; |
ff356414 | 173 | |
1fdb8d8f MRL |
174 | i = sctp_stream_alloc_in(stream, incnt, gfp); |
175 | if (i) { | |
5bbbbe32 MRL |
176 | ret = -ENOMEM; |
177 | goto free; | |
a8386317 XL |
178 | } |
179 | ||
ff356414 | 180 | stream->incnt = incnt; |
5bbbbe32 | 181 | goto out; |
ff356414 | 182 | |
5bbbbe32 MRL |
183 | free: |
184 | sched->free(stream); | |
185 | kfree(stream->out); | |
186 | stream->out = NULL; | |
187 | out: | |
188 | return ret; | |
a8386317 XL |
189 | } |
190 | ||
f952be79 MRL |
191 | int sctp_stream_init_ext(struct sctp_stream *stream, __u16 sid) |
192 | { | |
193 | struct sctp_stream_out_ext *soute; | |
194 | ||
195 | soute = kzalloc(sizeof(*soute), GFP_KERNEL); | |
196 | if (!soute) | |
197 | return -ENOMEM; | |
198 | stream->out[sid].ext = soute; | |
199 | ||
5bbbbe32 | 200 | return sctp_sched_init_sid(stream, sid, GFP_KERNEL); |
f952be79 MRL |
201 | } |
202 | ||
a8386317 XL |
203 | void sctp_stream_free(struct sctp_stream *stream) |
204 | { | |
5bbbbe32 | 205 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
f952be79 MRL |
206 | int i; |
207 | ||
5bbbbe32 | 208 | sched->free(stream); |
f952be79 MRL |
209 | for (i = 0; i < stream->outcnt; i++) |
210 | kfree(stream->out[i].ext); | |
a8386317 XL |
211 | kfree(stream->out); |
212 | kfree(stream->in); | |
a8386317 XL |
213 | } |
214 | ||
215 | void sctp_stream_clear(struct sctp_stream *stream) | |
216 | { | |
217 | int i; | |
218 | ||
219 | for (i = 0; i < stream->outcnt; i++) | |
220 | stream->out[i].ssn = 0; | |
221 | ||
222 | for (i = 0; i < stream->incnt; i++) | |
223 | stream->in[i].ssn = 0; | |
224 | } | |
7f9d68ac | 225 | |
cee360ab XL |
226 | void sctp_stream_update(struct sctp_stream *stream, struct sctp_stream *new) |
227 | { | |
5bbbbe32 MRL |
228 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
229 | ||
230 | sched->unsched_all(stream); | |
231 | sctp_stream_outq_migrate(stream, new, new->outcnt); | |
cee360ab XL |
232 | sctp_stream_free(stream); |
233 | ||
234 | stream->out = new->out; | |
235 | stream->in = new->in; | |
236 | stream->outcnt = new->outcnt; | |
237 | stream->incnt = new->incnt; | |
238 | ||
5bbbbe32 MRL |
239 | sched->sched_all(stream); |
240 | ||
cee360ab XL |
241 | new->out = NULL; |
242 | new->in = NULL; | |
243 | } | |
244 | ||
7f9d68ac XL |
245 | static int sctp_send_reconf(struct sctp_association *asoc, |
246 | struct sctp_chunk *chunk) | |
247 | { | |
248 | struct net *net = sock_net(asoc->base.sk); | |
249 | int retval = 0; | |
250 | ||
251 | retval = sctp_primitive_RECONF(net, asoc, chunk); | |
252 | if (retval) | |
253 | sctp_chunk_free(chunk); | |
254 | ||
255 | return retval; | |
256 | } | |
257 | ||
d570a59c XL |
258 | static bool sctp_stream_outq_is_empty(struct sctp_stream *stream, |
259 | __u16 str_nums, __be16 *str_list) | |
260 | { | |
261 | struct sctp_association *asoc; | |
262 | __u16 i; | |
263 | ||
264 | asoc = container_of(stream, struct sctp_association, stream); | |
265 | if (!asoc->outqueue.out_qlen) | |
266 | return true; | |
267 | ||
268 | if (!str_nums) | |
269 | return false; | |
270 | ||
271 | for (i = 0; i < str_nums; i++) { | |
272 | __u16 sid = ntohs(str_list[i]); | |
273 | ||
274 | if (stream->out[sid].ext && | |
275 | !list_empty(&stream->out[sid].ext->outq)) | |
276 | return false; | |
277 | } | |
278 | ||
279 | return true; | |
280 | } | |
281 | ||
7f9d68ac XL |
282 | int sctp_send_reset_streams(struct sctp_association *asoc, |
283 | struct sctp_reset_streams *params) | |
284 | { | |
cee360ab | 285 | struct sctp_stream *stream = &asoc->stream; |
7f9d68ac XL |
286 | __u16 i, str_nums, *str_list; |
287 | struct sctp_chunk *chunk; | |
288 | int retval = -EINVAL; | |
1da4fc97 | 289 | __be16 *nstr_list; |
7f9d68ac XL |
290 | bool out, in; |
291 | ||
292 | if (!asoc->peer.reconf_capable || | |
293 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) { | |
294 | retval = -ENOPROTOOPT; | |
295 | goto out; | |
296 | } | |
297 | ||
298 | if (asoc->strreset_outstanding) { | |
299 | retval = -EINPROGRESS; | |
300 | goto out; | |
301 | } | |
302 | ||
303 | out = params->srs_flags & SCTP_STREAM_RESET_OUTGOING; | |
304 | in = params->srs_flags & SCTP_STREAM_RESET_INCOMING; | |
305 | if (!out && !in) | |
306 | goto out; | |
307 | ||
308 | str_nums = params->srs_number_streams; | |
309 | str_list = params->srs_stream_list; | |
423852f8 XL |
310 | if (str_nums) { |
311 | int param_len = 0; | |
312 | ||
313 | if (out) { | |
314 | for (i = 0; i < str_nums; i++) | |
315 | if (str_list[i] >= stream->outcnt) | |
316 | goto out; | |
317 | ||
318 | param_len = str_nums * sizeof(__u16) + | |
319 | sizeof(struct sctp_strreset_outreq); | |
320 | } | |
321 | ||
322 | if (in) { | |
323 | for (i = 0; i < str_nums; i++) | |
324 | if (str_list[i] >= stream->incnt) | |
325 | goto out; | |
326 | ||
327 | param_len += str_nums * sizeof(__u16) + | |
328 | sizeof(struct sctp_strreset_inreq); | |
329 | } | |
330 | ||
331 | if (param_len > SCTP_MAX_CHUNK_LEN - | |
332 | sizeof(struct sctp_reconf_chunk)) | |
333 | goto out; | |
334 | } | |
7f9d68ac | 335 | |
1da4fc97 XL |
336 | nstr_list = kcalloc(str_nums, sizeof(__be16), GFP_KERNEL); |
337 | if (!nstr_list) { | |
338 | retval = -ENOMEM; | |
339 | goto out; | |
340 | } | |
341 | ||
16e1a919 | 342 | for (i = 0; i < str_nums; i++) |
1da4fc97 | 343 | nstr_list[i] = htons(str_list[i]); |
16e1a919 | 344 | |
d570a59c XL |
345 | if (out && !sctp_stream_outq_is_empty(stream, str_nums, nstr_list)) { |
346 | retval = -EAGAIN; | |
347 | goto out; | |
348 | } | |
349 | ||
1da4fc97 | 350 | chunk = sctp_make_strreset_req(asoc, str_nums, nstr_list, out, in); |
16e1a919 | 351 | |
1da4fc97 | 352 | kfree(nstr_list); |
16e1a919 | 353 | |
119aecba XL |
354 | if (!chunk) { |
355 | retval = -ENOMEM; | |
7f9d68ac | 356 | goto out; |
119aecba | 357 | } |
7f9d68ac XL |
358 | |
359 | if (out) { | |
360 | if (str_nums) | |
361 | for (i = 0; i < str_nums; i++) | |
362 | stream->out[str_list[i]].state = | |
363 | SCTP_STREAM_CLOSED; | |
364 | else | |
365 | for (i = 0; i < stream->outcnt; i++) | |
366 | stream->out[i].state = SCTP_STREAM_CLOSED; | |
367 | } | |
368 | ||
7f9d68ac XL |
369 | asoc->strreset_chunk = chunk; |
370 | sctp_chunk_hold(asoc->strreset_chunk); | |
371 | ||
372 | retval = sctp_send_reconf(asoc, chunk); | |
373 | if (retval) { | |
374 | sctp_chunk_put(asoc->strreset_chunk); | |
375 | asoc->strreset_chunk = NULL; | |
119aecba XL |
376 | if (!out) |
377 | goto out; | |
378 | ||
379 | if (str_nums) | |
380 | for (i = 0; i < str_nums; i++) | |
381 | stream->out[str_list[i]].state = | |
382 | SCTP_STREAM_OPEN; | |
383 | else | |
384 | for (i = 0; i < stream->outcnt; i++) | |
385 | stream->out[i].state = SCTP_STREAM_OPEN; | |
386 | ||
387 | goto out; | |
7f9d68ac XL |
388 | } |
389 | ||
119aecba XL |
390 | asoc->strreset_outstanding = out + in; |
391 | ||
7f9d68ac XL |
392 | out: |
393 | return retval; | |
394 | } | |
a92ce1a4 XL |
395 | |
396 | int sctp_send_reset_assoc(struct sctp_association *asoc) | |
397 | { | |
cee360ab | 398 | struct sctp_stream *stream = &asoc->stream; |
a92ce1a4 XL |
399 | struct sctp_chunk *chunk = NULL; |
400 | int retval; | |
401 | __u16 i; | |
402 | ||
403 | if (!asoc->peer.reconf_capable || | |
404 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
405 | return -ENOPROTOOPT; | |
406 | ||
407 | if (asoc->strreset_outstanding) | |
408 | return -EINPROGRESS; | |
409 | ||
5c6144a0 XL |
410 | if (!sctp_outq_is_empty(&asoc->outqueue)) |
411 | return -EAGAIN; | |
412 | ||
a92ce1a4 XL |
413 | chunk = sctp_make_strreset_tsnreq(asoc); |
414 | if (!chunk) | |
415 | return -ENOMEM; | |
416 | ||
417 | /* Block further xmit of data until this request is completed */ | |
cee360ab XL |
418 | for (i = 0; i < stream->outcnt; i++) |
419 | stream->out[i].state = SCTP_STREAM_CLOSED; | |
a92ce1a4 XL |
420 | |
421 | asoc->strreset_chunk = chunk; | |
422 | sctp_chunk_hold(asoc->strreset_chunk); | |
423 | ||
424 | retval = sctp_send_reconf(asoc, chunk); | |
425 | if (retval) { | |
426 | sctp_chunk_put(asoc->strreset_chunk); | |
427 | asoc->strreset_chunk = NULL; | |
428 | ||
cee360ab XL |
429 | for (i = 0; i < stream->outcnt; i++) |
430 | stream->out[i].state = SCTP_STREAM_OPEN; | |
a92ce1a4 XL |
431 | |
432 | return retval; | |
433 | } | |
434 | ||
435 | asoc->strreset_outstanding = 1; | |
436 | ||
437 | return 0; | |
438 | } | |
242bd2d5 XL |
439 | |
440 | int sctp_send_add_streams(struct sctp_association *asoc, | |
441 | struct sctp_add_streams *params) | |
442 | { | |
cee360ab | 443 | struct sctp_stream *stream = &asoc->stream; |
242bd2d5 | 444 | struct sctp_chunk *chunk = NULL; |
dc82673f | 445 | int retval; |
242bd2d5 XL |
446 | __u32 outcnt, incnt; |
447 | __u16 out, in; | |
448 | ||
449 | if (!asoc->peer.reconf_capable || | |
450 | !(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) { | |
451 | retval = -ENOPROTOOPT; | |
452 | goto out; | |
453 | } | |
454 | ||
455 | if (asoc->strreset_outstanding) { | |
456 | retval = -EINPROGRESS; | |
457 | goto out; | |
458 | } | |
459 | ||
460 | out = params->sas_outstrms; | |
461 | in = params->sas_instrms; | |
462 | outcnt = stream->outcnt + out; | |
463 | incnt = stream->incnt + in; | |
464 | if (outcnt > SCTP_MAX_STREAM || incnt > SCTP_MAX_STREAM || | |
465 | (!out && !in)) { | |
466 | retval = -EINVAL; | |
467 | goto out; | |
468 | } | |
469 | ||
470 | if (out) { | |
e090abd0 MRL |
471 | retval = sctp_stream_alloc_out(stream, outcnt, GFP_KERNEL); |
472 | if (retval) | |
242bd2d5 | 473 | goto out; |
242bd2d5 XL |
474 | } |
475 | ||
242bd2d5 | 476 | chunk = sctp_make_strreset_addstrm(asoc, out, in); |
dc82673f WY |
477 | if (!chunk) { |
478 | retval = -ENOMEM; | |
242bd2d5 | 479 | goto out; |
dc82673f | 480 | } |
242bd2d5 XL |
481 | |
482 | asoc->strreset_chunk = chunk; | |
483 | sctp_chunk_hold(asoc->strreset_chunk); | |
484 | ||
485 | retval = sctp_send_reconf(asoc, chunk); | |
486 | if (retval) { | |
487 | sctp_chunk_put(asoc->strreset_chunk); | |
488 | asoc->strreset_chunk = NULL; | |
489 | goto out; | |
490 | } | |
491 | ||
492 | stream->incnt = incnt; | |
493 | stream->outcnt = outcnt; | |
494 | ||
495 | asoc->strreset_outstanding = !!out + !!in; | |
496 | ||
497 | out: | |
498 | return retval; | |
499 | } | |
81054476 | 500 | |
3c918704 | 501 | static struct sctp_paramhdr *sctp_chunk_lookup_strreset_param( |
1da4fc97 | 502 | struct sctp_association *asoc, __be32 resp_seq, |
50a41591 | 503 | __be16 type) |
81054476 XL |
504 | { |
505 | struct sctp_chunk *chunk = asoc->strreset_chunk; | |
506 | struct sctp_reconf_chunk *hdr; | |
507 | union sctp_params param; | |
508 | ||
50a41591 | 509 | if (!chunk) |
81054476 XL |
510 | return NULL; |
511 | ||
512 | hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr; | |
513 | sctp_walk_params(param, hdr, params) { | |
514 | /* sctp_strreset_tsnreq is actually the basic structure | |
515 | * of all stream reconf params, so it's safe to use it | |
516 | * to access request_seq. | |
517 | */ | |
518 | struct sctp_strreset_tsnreq *req = param.v; | |
519 | ||
50a41591 XL |
520 | if ((!resp_seq || req->request_seq == resp_seq) && |
521 | (!type || type == req->param_hdr.type)) | |
81054476 XL |
522 | return param.v; |
523 | } | |
524 | ||
525 | return NULL; | |
526 | } | |
527 | ||
e4dc99c7 XL |
528 | static void sctp_update_strreset_result(struct sctp_association *asoc, |
529 | __u32 result) | |
530 | { | |
531 | asoc->strreset_result[1] = asoc->strreset_result[0]; | |
532 | asoc->strreset_result[0] = result; | |
533 | } | |
534 | ||
81054476 XL |
535 | struct sctp_chunk *sctp_process_strreset_outreq( |
536 | struct sctp_association *asoc, | |
537 | union sctp_params param, | |
538 | struct sctp_ulpevent **evp) | |
539 | { | |
540 | struct sctp_strreset_outreq *outreq = param.v; | |
cee360ab | 541 | struct sctp_stream *stream = &asoc->stream; |
81054476 | 542 | __u32 result = SCTP_STRRESET_DENIED; |
1da4fc97 XL |
543 | __u16 i, nums, flags = 0; |
544 | __be16 *str_p = NULL; | |
81054476 XL |
545 | __u32 request_seq; |
546 | ||
547 | request_seq = ntohl(outreq->request_seq); | |
548 | ||
549 | if (ntohl(outreq->send_reset_at_tsn) > | |
550 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map)) { | |
551 | result = SCTP_STRRESET_IN_PROGRESS; | |
e4dc99c7 | 552 | goto err; |
81054476 XL |
553 | } |
554 | ||
e4dc99c7 XL |
555 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
556 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
81054476 | 557 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
558 | goto err; |
559 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
560 | i = asoc->strreset_inseq - request_seq - 1; | |
561 | result = asoc->strreset_result[i]; | |
562 | goto err; | |
81054476 | 563 | } |
e4dc99c7 | 564 | asoc->strreset_inseq++; |
81054476 XL |
565 | |
566 | /* Check strreset_enable after inseq inc, as sender cannot tell | |
567 | * the peer doesn't enable strreset after receiving response with | |
568 | * result denied, as well as to keep consistent with bsd. | |
569 | */ | |
570 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
571 | goto out; | |
572 | ||
573 | if (asoc->strreset_chunk) { | |
50a41591 XL |
574 | if (!sctp_chunk_lookup_strreset_param( |
575 | asoc, outreq->response_seq, | |
576 | SCTP_PARAM_RESET_IN_REQUEST)) { | |
81054476 XL |
577 | /* same process with outstanding isn't 0 */ |
578 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
579 | goto out; | |
580 | } | |
581 | ||
582 | asoc->strreset_outstanding--; | |
583 | asoc->strreset_outseq++; | |
584 | ||
585 | if (!asoc->strreset_outstanding) { | |
50a41591 XL |
586 | struct sctp_transport *t; |
587 | ||
81054476 XL |
588 | t = asoc->strreset_chunk->transport; |
589 | if (del_timer(&t->reconf_timer)) | |
590 | sctp_transport_put(t); | |
591 | ||
592 | sctp_chunk_put(asoc->strreset_chunk); | |
593 | asoc->strreset_chunk = NULL; | |
594 | } | |
595 | ||
596 | flags = SCTP_STREAM_RESET_INCOMING_SSN; | |
597 | } | |
598 | ||
3aa623da | 599 | nums = (ntohs(param.p->length) - sizeof(*outreq)) / sizeof(__u16); |
81054476 XL |
600 | if (nums) { |
601 | str_p = outreq->list_of_streams; | |
602 | for (i = 0; i < nums; i++) { | |
603 | if (ntohs(str_p[i]) >= stream->incnt) { | |
604 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
605 | goto out; | |
606 | } | |
607 | } | |
608 | ||
609 | for (i = 0; i < nums; i++) | |
610 | stream->in[ntohs(str_p[i])].ssn = 0; | |
611 | } else { | |
612 | for (i = 0; i < stream->incnt; i++) | |
613 | stream->in[i].ssn = 0; | |
614 | } | |
615 | ||
616 | result = SCTP_STRRESET_PERFORMED; | |
617 | ||
618 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, | |
619 | flags | SCTP_STREAM_RESET_OUTGOING_SSN, nums, str_p, | |
620 | GFP_ATOMIC); | |
621 | ||
622 | out: | |
e4dc99c7 XL |
623 | sctp_update_strreset_result(asoc, result); |
624 | err: | |
81054476 XL |
625 | return sctp_make_strreset_resp(asoc, result, request_seq); |
626 | } | |
16e1a919 XL |
627 | |
628 | struct sctp_chunk *sctp_process_strreset_inreq( | |
629 | struct sctp_association *asoc, | |
630 | union sctp_params param, | |
631 | struct sctp_ulpevent **evp) | |
632 | { | |
633 | struct sctp_strreset_inreq *inreq = param.v; | |
cee360ab | 634 | struct sctp_stream *stream = &asoc->stream; |
16e1a919 XL |
635 | __u32 result = SCTP_STRRESET_DENIED; |
636 | struct sctp_chunk *chunk = NULL; | |
16e1a919 | 637 | __u32 request_seq; |
1da4fc97 XL |
638 | __u16 i, nums; |
639 | __be16 *str_p; | |
16e1a919 XL |
640 | |
641 | request_seq = ntohl(inreq->request_seq); | |
d0f025e6 XL |
642 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
643 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
16e1a919 | 644 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
645 | goto err; |
646 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
647 | i = asoc->strreset_inseq - request_seq - 1; | |
648 | result = asoc->strreset_result[i]; | |
649 | if (result == SCTP_STRRESET_PERFORMED) | |
650 | return NULL; | |
651 | goto err; | |
16e1a919 | 652 | } |
d0f025e6 | 653 | asoc->strreset_inseq++; |
16e1a919 XL |
654 | |
655 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
656 | goto out; | |
657 | ||
658 | if (asoc->strreset_outstanding) { | |
659 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
660 | goto out; | |
661 | } | |
662 | ||
3aa623da | 663 | nums = (ntohs(param.p->length) - sizeof(*inreq)) / sizeof(__u16); |
16e1a919 XL |
664 | str_p = inreq->list_of_streams; |
665 | for (i = 0; i < nums; i++) { | |
666 | if (ntohs(str_p[i]) >= stream->outcnt) { | |
667 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
668 | goto out; | |
669 | } | |
670 | } | |
671 | ||
d570a59c XL |
672 | if (!sctp_stream_outq_is_empty(stream, nums, str_p)) { |
673 | result = SCTP_STRRESET_IN_PROGRESS; | |
674 | asoc->strreset_inseq--; | |
675 | goto err; | |
676 | } | |
677 | ||
16e1a919 XL |
678 | chunk = sctp_make_strreset_req(asoc, nums, str_p, 1, 0); |
679 | if (!chunk) | |
680 | goto out; | |
681 | ||
682 | if (nums) | |
683 | for (i = 0; i < nums; i++) | |
684 | stream->out[ntohs(str_p[i])].state = | |
685 | SCTP_STREAM_CLOSED; | |
686 | else | |
687 | for (i = 0; i < stream->outcnt; i++) | |
688 | stream->out[i].state = SCTP_STREAM_CLOSED; | |
689 | ||
690 | asoc->strreset_chunk = chunk; | |
691 | asoc->strreset_outstanding = 1; | |
692 | sctp_chunk_hold(asoc->strreset_chunk); | |
693 | ||
d0f025e6 XL |
694 | result = SCTP_STRRESET_PERFORMED; |
695 | ||
16e1a919 XL |
696 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, |
697 | SCTP_STREAM_RESET_INCOMING_SSN, nums, str_p, GFP_ATOMIC); | |
698 | ||
699 | out: | |
d0f025e6 XL |
700 | sctp_update_strreset_result(asoc, result); |
701 | err: | |
16e1a919 XL |
702 | if (!chunk) |
703 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
704 | ||
705 | return chunk; | |
706 | } | |
692787ce XL |
707 | |
708 | struct sctp_chunk *sctp_process_strreset_tsnreq( | |
709 | struct sctp_association *asoc, | |
710 | union sctp_params param, | |
711 | struct sctp_ulpevent **evp) | |
712 | { | |
713 | __u32 init_tsn = 0, next_tsn = 0, max_tsn_seen; | |
714 | struct sctp_strreset_tsnreq *tsnreq = param.v; | |
cee360ab | 715 | struct sctp_stream *stream = &asoc->stream; |
692787ce XL |
716 | __u32 result = SCTP_STRRESET_DENIED; |
717 | __u32 request_seq; | |
718 | __u16 i; | |
719 | ||
720 | request_seq = ntohl(tsnreq->request_seq); | |
6c801387 XL |
721 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
722 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
692787ce | 723 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
6c801387 XL |
724 | goto err; |
725 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
726 | i = asoc->strreset_inseq - request_seq - 1; | |
727 | result = asoc->strreset_result[i]; | |
728 | if (result == SCTP_STRRESET_PERFORMED) { | |
52a39589 | 729 | next_tsn = asoc->ctsn_ack_point + 1; |
6c801387 XL |
730 | init_tsn = |
731 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + 1; | |
732 | } | |
733 | goto err; | |
692787ce | 734 | } |
5c6144a0 XL |
735 | |
736 | if (!sctp_outq_is_empty(&asoc->outqueue)) { | |
737 | result = SCTP_STRRESET_IN_PROGRESS; | |
738 | goto err; | |
739 | } | |
740 | ||
6c801387 | 741 | asoc->strreset_inseq++; |
692787ce XL |
742 | |
743 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
744 | goto out; | |
745 | ||
746 | if (asoc->strreset_outstanding) { | |
747 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
748 | goto out; | |
749 | } | |
750 | ||
159f2a74 XL |
751 | /* G4: The same processing as though a FWD-TSN chunk (as defined in |
752 | * [RFC3758]) with all streams affected and a new cumulative TSN | |
753 | * ACK of the Receiver's Next TSN minus 1 were received MUST be | |
754 | * performed. | |
692787ce XL |
755 | */ |
756 | max_tsn_seen = sctp_tsnmap_get_max_tsn_seen(&asoc->peer.tsn_map); | |
47b20a88 | 757 | asoc->stream.si->report_ftsn(&asoc->ulpq, max_tsn_seen); |
692787ce XL |
758 | |
759 | /* G1: Compute an appropriate value for the Receiver's Next TSN -- the | |
760 | * TSN that the peer should use to send the next DATA chunk. The | |
761 | * value SHOULD be the smallest TSN not acknowledged by the | |
762 | * receiver of the request plus 2^31. | |
763 | */ | |
764 | init_tsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + (1 << 31); | |
765 | sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_INITIAL, | |
766 | init_tsn, GFP_ATOMIC); | |
767 | ||
159f2a74 XL |
768 | /* G3: The same processing as though a SACK chunk with no gap report |
769 | * and a cumulative TSN ACK of the Sender's Next TSN minus 1 were | |
770 | * received MUST be performed. | |
692787ce XL |
771 | */ |
772 | sctp_outq_free(&asoc->outqueue); | |
773 | ||
774 | /* G2: Compute an appropriate value for the local endpoint's next TSN, | |
775 | * i.e., the next TSN assigned by the receiver of the SSN/TSN reset | |
776 | * chunk. The value SHOULD be the highest TSN sent by the receiver | |
777 | * of the request plus 1. | |
778 | */ | |
779 | next_tsn = asoc->next_tsn; | |
780 | asoc->ctsn_ack_point = next_tsn - 1; | |
781 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
782 | ||
783 | /* G5: The next expected and outgoing SSNs MUST be reset to 0 for all | |
784 | * incoming and outgoing streams. | |
785 | */ | |
786 | for (i = 0; i < stream->outcnt; i++) | |
787 | stream->out[i].ssn = 0; | |
788 | for (i = 0; i < stream->incnt; i++) | |
789 | stream->in[i].ssn = 0; | |
790 | ||
791 | result = SCTP_STRRESET_PERFORMED; | |
792 | ||
793 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, 0, init_tsn, | |
794 | next_tsn, GFP_ATOMIC); | |
795 | ||
796 | out: | |
6c801387 XL |
797 | sctp_update_strreset_result(asoc, result); |
798 | err: | |
692787ce XL |
799 | return sctp_make_strreset_tsnresp(asoc, result, request_seq, |
800 | next_tsn, init_tsn); | |
801 | } | |
50a41591 XL |
802 | |
803 | struct sctp_chunk *sctp_process_strreset_addstrm_out( | |
804 | struct sctp_association *asoc, | |
805 | union sctp_params param, | |
806 | struct sctp_ulpevent **evp) | |
807 | { | |
808 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 809 | struct sctp_stream *stream = &asoc->stream; |
50a41591 | 810 | __u32 result = SCTP_STRRESET_DENIED; |
50a41591 | 811 | __u32 request_seq, incnt; |
e4dc99c7 | 812 | __u16 in, i; |
50a41591 XL |
813 | |
814 | request_seq = ntohl(addstrm->request_seq); | |
e4dc99c7 XL |
815 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
816 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
50a41591 | 817 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
818 | goto err; |
819 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
820 | i = asoc->strreset_inseq - request_seq - 1; | |
821 | result = asoc->strreset_result[i]; | |
822 | goto err; | |
50a41591 | 823 | } |
e4dc99c7 | 824 | asoc->strreset_inseq++; |
50a41591 XL |
825 | |
826 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
827 | goto out; | |
828 | ||
829 | if (asoc->strreset_chunk) { | |
830 | if (!sctp_chunk_lookup_strreset_param( | |
831 | asoc, 0, SCTP_PARAM_RESET_ADD_IN_STREAMS)) { | |
832 | /* same process with outstanding isn't 0 */ | |
833 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
834 | goto out; | |
835 | } | |
836 | ||
837 | asoc->strreset_outstanding--; | |
838 | asoc->strreset_outseq++; | |
839 | ||
840 | if (!asoc->strreset_outstanding) { | |
841 | struct sctp_transport *t; | |
842 | ||
843 | t = asoc->strreset_chunk->transport; | |
844 | if (del_timer(&t->reconf_timer)) | |
845 | sctp_transport_put(t); | |
846 | ||
847 | sctp_chunk_put(asoc->strreset_chunk); | |
848 | asoc->strreset_chunk = NULL; | |
849 | } | |
850 | } | |
851 | ||
852 | in = ntohs(addstrm->number_of_streams); | |
853 | incnt = stream->incnt + in; | |
854 | if (!in || incnt > SCTP_MAX_STREAM) | |
855 | goto out; | |
856 | ||
1fdb8d8f | 857 | if (sctp_stream_alloc_in(stream, incnt, GFP_ATOMIC)) |
50a41591 XL |
858 | goto out; |
859 | ||
50a41591 XL |
860 | stream->incnt = incnt; |
861 | ||
862 | result = SCTP_STRRESET_PERFORMED; | |
863 | ||
864 | *evp = sctp_ulpevent_make_stream_change_event(asoc, | |
865 | 0, ntohs(addstrm->number_of_streams), 0, GFP_ATOMIC); | |
866 | ||
867 | out: | |
e4dc99c7 XL |
868 | sctp_update_strreset_result(asoc, result); |
869 | err: | |
50a41591 XL |
870 | return sctp_make_strreset_resp(asoc, result, request_seq); |
871 | } | |
c5c4ebb3 XL |
872 | |
873 | struct sctp_chunk *sctp_process_strreset_addstrm_in( | |
874 | struct sctp_association *asoc, | |
875 | union sctp_params param, | |
876 | struct sctp_ulpevent **evp) | |
877 | { | |
878 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 879 | struct sctp_stream *stream = &asoc->stream; |
c5c4ebb3 | 880 | __u32 result = SCTP_STRRESET_DENIED; |
c5c4ebb3 XL |
881 | struct sctp_chunk *chunk = NULL; |
882 | __u32 request_seq, outcnt; | |
d0f025e6 | 883 | __u16 out, i; |
e090abd0 | 884 | int ret; |
c5c4ebb3 XL |
885 | |
886 | request_seq = ntohl(addstrm->request_seq); | |
d0f025e6 XL |
887 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
888 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
c5c4ebb3 | 889 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
890 | goto err; |
891 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
892 | i = asoc->strreset_inseq - request_seq - 1; | |
893 | result = asoc->strreset_result[i]; | |
894 | if (result == SCTP_STRRESET_PERFORMED) | |
895 | return NULL; | |
896 | goto err; | |
c5c4ebb3 | 897 | } |
d0f025e6 | 898 | asoc->strreset_inseq++; |
c5c4ebb3 XL |
899 | |
900 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
901 | goto out; | |
902 | ||
903 | if (asoc->strreset_outstanding) { | |
904 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
905 | goto out; | |
906 | } | |
907 | ||
908 | out = ntohs(addstrm->number_of_streams); | |
909 | outcnt = stream->outcnt + out; | |
910 | if (!out || outcnt > SCTP_MAX_STREAM) | |
911 | goto out; | |
912 | ||
e090abd0 MRL |
913 | ret = sctp_stream_alloc_out(stream, outcnt, GFP_ATOMIC); |
914 | if (ret) | |
c5c4ebb3 XL |
915 | goto out; |
916 | ||
c5c4ebb3 XL |
917 | chunk = sctp_make_strreset_addstrm(asoc, out, 0); |
918 | if (!chunk) | |
919 | goto out; | |
920 | ||
921 | asoc->strreset_chunk = chunk; | |
922 | asoc->strreset_outstanding = 1; | |
923 | sctp_chunk_hold(asoc->strreset_chunk); | |
924 | ||
925 | stream->outcnt = outcnt; | |
926 | ||
d0f025e6 XL |
927 | result = SCTP_STRRESET_PERFORMED; |
928 | ||
c5c4ebb3 XL |
929 | *evp = sctp_ulpevent_make_stream_change_event(asoc, |
930 | 0, 0, ntohs(addstrm->number_of_streams), GFP_ATOMIC); | |
931 | ||
932 | out: | |
d0f025e6 XL |
933 | sctp_update_strreset_result(asoc, result); |
934 | err: | |
c5c4ebb3 XL |
935 | if (!chunk) |
936 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
937 | ||
938 | return chunk; | |
939 | } | |
11ae76e6 XL |
940 | |
941 | struct sctp_chunk *sctp_process_strreset_resp( | |
942 | struct sctp_association *asoc, | |
943 | union sctp_params param, | |
944 | struct sctp_ulpevent **evp) | |
945 | { | |
cee360ab | 946 | struct sctp_stream *stream = &asoc->stream; |
11ae76e6 | 947 | struct sctp_strreset_resp *resp = param.v; |
11ae76e6 XL |
948 | struct sctp_transport *t; |
949 | __u16 i, nums, flags = 0; | |
3c918704 | 950 | struct sctp_paramhdr *req; |
11ae76e6 XL |
951 | __u32 result; |
952 | ||
953 | req = sctp_chunk_lookup_strreset_param(asoc, resp->response_seq, 0); | |
954 | if (!req) | |
955 | return NULL; | |
956 | ||
957 | result = ntohl(resp->result); | |
958 | if (result != SCTP_STRRESET_PERFORMED) { | |
959 | /* if in progress, do nothing but retransmit */ | |
960 | if (result == SCTP_STRRESET_IN_PROGRESS) | |
961 | return NULL; | |
962 | else if (result == SCTP_STRRESET_DENIED) | |
963 | flags = SCTP_STREAM_RESET_DENIED; | |
964 | else | |
965 | flags = SCTP_STREAM_RESET_FAILED; | |
966 | } | |
967 | ||
968 | if (req->type == SCTP_PARAM_RESET_OUT_REQUEST) { | |
969 | struct sctp_strreset_outreq *outreq; | |
1da4fc97 | 970 | __be16 *str_p; |
11ae76e6 XL |
971 | |
972 | outreq = (struct sctp_strreset_outreq *)req; | |
edb12f2d | 973 | str_p = outreq->list_of_streams; |
3aa623da XL |
974 | nums = (ntohs(outreq->param_hdr.length) - sizeof(*outreq)) / |
975 | sizeof(__u16); | |
11ae76e6 XL |
976 | |
977 | if (result == SCTP_STRRESET_PERFORMED) { | |
978 | if (nums) { | |
11ae76e6 XL |
979 | for (i = 0; i < nums; i++) |
980 | stream->out[ntohs(str_p[i])].ssn = 0; | |
981 | } else { | |
982 | for (i = 0; i < stream->outcnt; i++) | |
983 | stream->out[i].ssn = 0; | |
984 | } | |
985 | ||
986 | flags = SCTP_STREAM_RESET_OUTGOING_SSN; | |
987 | } | |
988 | ||
989 | for (i = 0; i < stream->outcnt; i++) | |
990 | stream->out[i].state = SCTP_STREAM_OPEN; | |
991 | ||
992 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, | |
993 | nums, str_p, GFP_ATOMIC); | |
994 | } else if (req->type == SCTP_PARAM_RESET_IN_REQUEST) { | |
995 | struct sctp_strreset_inreq *inreq; | |
1da4fc97 | 996 | __be16 *str_p; |
11ae76e6 XL |
997 | |
998 | /* if the result is performed, it's impossible for inreq */ | |
999 | if (result == SCTP_STRRESET_PERFORMED) | |
1000 | return NULL; | |
1001 | ||
1002 | inreq = (struct sctp_strreset_inreq *)req; | |
edb12f2d | 1003 | str_p = inreq->list_of_streams; |
3aa623da XL |
1004 | nums = (ntohs(inreq->param_hdr.length) - sizeof(*inreq)) / |
1005 | sizeof(__u16); | |
11ae76e6 | 1006 | |
11ae76e6 XL |
1007 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, |
1008 | nums, str_p, GFP_ATOMIC); | |
1009 | } else if (req->type == SCTP_PARAM_RESET_TSN_REQUEST) { | |
1010 | struct sctp_strreset_resptsn *resptsn; | |
1011 | __u32 stsn, rtsn; | |
1012 | ||
1013 | /* check for resptsn, as sctp_verify_reconf didn't do it*/ | |
1014 | if (ntohs(param.p->length) != sizeof(*resptsn)) | |
1015 | return NULL; | |
1016 | ||
1017 | resptsn = (struct sctp_strreset_resptsn *)resp; | |
1018 | stsn = ntohl(resptsn->senders_next_tsn); | |
1019 | rtsn = ntohl(resptsn->receivers_next_tsn); | |
1020 | ||
1021 | if (result == SCTP_STRRESET_PERFORMED) { | |
1022 | __u32 mtsn = sctp_tsnmap_get_max_tsn_seen( | |
1023 | &asoc->peer.tsn_map); | |
159f2a74 | 1024 | LIST_HEAD(temp); |
11ae76e6 | 1025 | |
47b20a88 | 1026 | asoc->stream.si->report_ftsn(&asoc->ulpq, mtsn); |
11ae76e6 XL |
1027 | |
1028 | sctp_tsnmap_init(&asoc->peer.tsn_map, | |
1029 | SCTP_TSN_MAP_INITIAL, | |
1030 | stsn, GFP_ATOMIC); | |
1031 | ||
159f2a74 XL |
1032 | /* Clean up sacked and abandoned queues only. As the |
1033 | * out_chunk_list may not be empty, splice it to temp, | |
1034 | * then get it back after sctp_outq_free is done. | |
1035 | */ | |
1036 | list_splice_init(&asoc->outqueue.out_chunk_list, &temp); | |
11ae76e6 | 1037 | sctp_outq_free(&asoc->outqueue); |
159f2a74 | 1038 | list_splice_init(&temp, &asoc->outqueue.out_chunk_list); |
11ae76e6 XL |
1039 | |
1040 | asoc->next_tsn = rtsn; | |
1041 | asoc->ctsn_ack_point = asoc->next_tsn - 1; | |
1042 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
1043 | ||
1044 | for (i = 0; i < stream->outcnt; i++) | |
1045 | stream->out[i].ssn = 0; | |
1046 | for (i = 0; i < stream->incnt; i++) | |
1047 | stream->in[i].ssn = 0; | |
1048 | } | |
1049 | ||
1050 | for (i = 0; i < stream->outcnt; i++) | |
1051 | stream->out[i].state = SCTP_STREAM_OPEN; | |
1052 | ||
1053 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, flags, | |
1054 | stsn, rtsn, GFP_ATOMIC); | |
1055 | } else if (req->type == SCTP_PARAM_RESET_ADD_OUT_STREAMS) { | |
1056 | struct sctp_strreset_addstrm *addstrm; | |
1057 | __u16 number; | |
1058 | ||
1059 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1060 | nums = ntohs(addstrm->number_of_streams); | |
1061 | number = stream->outcnt - nums; | |
1062 | ||
1063 | if (result == SCTP_STRRESET_PERFORMED) | |
1064 | for (i = number; i < stream->outcnt; i++) | |
1065 | stream->out[i].state = SCTP_STREAM_OPEN; | |
1066 | else | |
1067 | stream->outcnt = number; | |
1068 | ||
1069 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1070 | 0, nums, GFP_ATOMIC); | |
1071 | } else if (req->type == SCTP_PARAM_RESET_ADD_IN_STREAMS) { | |
1072 | struct sctp_strreset_addstrm *addstrm; | |
1073 | ||
1074 | /* if the result is performed, it's impossible for addstrm in | |
1075 | * request. | |
1076 | */ | |
1077 | if (result == SCTP_STRRESET_PERFORMED) | |
1078 | return NULL; | |
1079 | ||
1080 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1081 | nums = ntohs(addstrm->number_of_streams); | |
1082 | ||
1083 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1084 | nums, 0, GFP_ATOMIC); | |
1085 | } | |
1086 | ||
1087 | asoc->strreset_outstanding--; | |
1088 | asoc->strreset_outseq++; | |
1089 | ||
1090 | /* remove everything for this reconf request */ | |
1091 | if (!asoc->strreset_outstanding) { | |
1092 | t = asoc->strreset_chunk->transport; | |
1093 | if (del_timer(&t->reconf_timer)) | |
1094 | sctp_transport_put(t); | |
1095 | ||
1096 | sctp_chunk_put(asoc->strreset_chunk); | |
1097 | asoc->strreset_chunk = NULL; | |
1098 | } | |
1099 | ||
1100 | return NULL; | |
1101 | } |