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 | * | |
fae8b6f4 | 9 | * This file contains sctp stream maniuplation primitives and helpers. |
a8386317 XL |
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: |
0c3f6f65 | 170 | sctp_stream_interleave_init(stream); |
ff356414 | 171 | if (!incnt) |
5bbbbe32 | 172 | goto out; |
ff356414 | 173 | |
79d08951 MRL |
174 | ret = sctp_stream_alloc_in(stream, incnt, gfp); |
175 | if (ret) { | |
176 | sched->free(stream); | |
177 | kfree(stream->out); | |
178 | stream->out = NULL; | |
179 | stream->outcnt = 0; | |
180 | goto out; | |
a8386317 XL |
181 | } |
182 | ||
ff356414 XL |
183 | stream->incnt = incnt; |
184 | ||
5bbbbe32 MRL |
185 | out: |
186 | return ret; | |
a8386317 XL |
187 | } |
188 | ||
f952be79 MRL |
189 | int sctp_stream_init_ext(struct sctp_stream *stream, __u16 sid) |
190 | { | |
191 | struct sctp_stream_out_ext *soute; | |
192 | ||
193 | soute = kzalloc(sizeof(*soute), GFP_KERNEL); | |
194 | if (!soute) | |
195 | return -ENOMEM; | |
196 | stream->out[sid].ext = soute; | |
197 | ||
5bbbbe32 | 198 | return sctp_sched_init_sid(stream, sid, GFP_KERNEL); |
f952be79 MRL |
199 | } |
200 | ||
a8386317 XL |
201 | void sctp_stream_free(struct sctp_stream *stream) |
202 | { | |
5bbbbe32 | 203 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
f952be79 MRL |
204 | int i; |
205 | ||
5bbbbe32 | 206 | sched->free(stream); |
f952be79 MRL |
207 | for (i = 0; i < stream->outcnt; i++) |
208 | kfree(stream->out[i].ext); | |
a8386317 XL |
209 | kfree(stream->out); |
210 | kfree(stream->in); | |
a8386317 XL |
211 | } |
212 | ||
213 | void sctp_stream_clear(struct sctp_stream *stream) | |
214 | { | |
215 | int i; | |
216 | ||
107e2425 XL |
217 | for (i = 0; i < stream->outcnt; i++) { |
218 | stream->out[i].mid = 0; | |
219 | stream->out[i].mid_uo = 0; | |
220 | } | |
a8386317 XL |
221 | |
222 | for (i = 0; i < stream->incnt; i++) | |
107e2425 | 223 | stream->in[i].mid = 0; |
a8386317 | 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; | |
6a9a27d5 XL |
243 | new->outcnt = 0; |
244 | new->incnt = 0; | |
cee360ab XL |
245 | } |
246 | ||
7f9d68ac XL |
247 | static int sctp_send_reconf(struct sctp_association *asoc, |
248 | struct sctp_chunk *chunk) | |
249 | { | |
250 | struct net *net = sock_net(asoc->base.sk); | |
251 | int retval = 0; | |
252 | ||
253 | retval = sctp_primitive_RECONF(net, asoc, chunk); | |
254 | if (retval) | |
255 | sctp_chunk_free(chunk); | |
256 | ||
257 | return retval; | |
258 | } | |
259 | ||
d570a59c XL |
260 | static bool sctp_stream_outq_is_empty(struct sctp_stream *stream, |
261 | __u16 str_nums, __be16 *str_list) | |
262 | { | |
263 | struct sctp_association *asoc; | |
264 | __u16 i; | |
265 | ||
266 | asoc = container_of(stream, struct sctp_association, stream); | |
267 | if (!asoc->outqueue.out_qlen) | |
268 | return true; | |
269 | ||
270 | if (!str_nums) | |
271 | return false; | |
272 | ||
273 | for (i = 0; i < str_nums; i++) { | |
274 | __u16 sid = ntohs(str_list[i]); | |
275 | ||
276 | if (stream->out[sid].ext && | |
277 | !list_empty(&stream->out[sid].ext->outq)) | |
278 | return false; | |
279 | } | |
280 | ||
281 | return true; | |
282 | } | |
283 | ||
7f9d68ac XL |
284 | int sctp_send_reset_streams(struct sctp_association *asoc, |
285 | struct sctp_reset_streams *params) | |
286 | { | |
cee360ab | 287 | struct sctp_stream *stream = &asoc->stream; |
7f9d68ac XL |
288 | __u16 i, str_nums, *str_list; |
289 | struct sctp_chunk *chunk; | |
290 | int retval = -EINVAL; | |
1da4fc97 | 291 | __be16 *nstr_list; |
7f9d68ac XL |
292 | bool out, in; |
293 | ||
294 | if (!asoc->peer.reconf_capable || | |
295 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) { | |
296 | retval = -ENOPROTOOPT; | |
297 | goto out; | |
298 | } | |
299 | ||
300 | if (asoc->strreset_outstanding) { | |
301 | retval = -EINPROGRESS; | |
302 | goto out; | |
303 | } | |
304 | ||
305 | out = params->srs_flags & SCTP_STREAM_RESET_OUTGOING; | |
306 | in = params->srs_flags & SCTP_STREAM_RESET_INCOMING; | |
307 | if (!out && !in) | |
308 | goto out; | |
309 | ||
310 | str_nums = params->srs_number_streams; | |
311 | str_list = params->srs_stream_list; | |
423852f8 XL |
312 | if (str_nums) { |
313 | int param_len = 0; | |
314 | ||
315 | if (out) { | |
316 | for (i = 0; i < str_nums; i++) | |
317 | if (str_list[i] >= stream->outcnt) | |
318 | goto out; | |
319 | ||
320 | param_len = str_nums * sizeof(__u16) + | |
321 | sizeof(struct sctp_strreset_outreq); | |
322 | } | |
323 | ||
324 | if (in) { | |
325 | for (i = 0; i < str_nums; i++) | |
326 | if (str_list[i] >= stream->incnt) | |
327 | goto out; | |
328 | ||
329 | param_len += str_nums * sizeof(__u16) + | |
330 | sizeof(struct sctp_strreset_inreq); | |
331 | } | |
332 | ||
333 | if (param_len > SCTP_MAX_CHUNK_LEN - | |
334 | sizeof(struct sctp_reconf_chunk)) | |
335 | goto out; | |
336 | } | |
7f9d68ac | 337 | |
1da4fc97 XL |
338 | nstr_list = kcalloc(str_nums, sizeof(__be16), GFP_KERNEL); |
339 | if (!nstr_list) { | |
340 | retval = -ENOMEM; | |
341 | goto out; | |
342 | } | |
343 | ||
16e1a919 | 344 | for (i = 0; i < str_nums; i++) |
1da4fc97 | 345 | nstr_list[i] = htons(str_list[i]); |
16e1a919 | 346 | |
d570a59c XL |
347 | if (out && !sctp_stream_outq_is_empty(stream, str_nums, nstr_list)) { |
348 | retval = -EAGAIN; | |
349 | goto out; | |
350 | } | |
351 | ||
1da4fc97 | 352 | chunk = sctp_make_strreset_req(asoc, str_nums, nstr_list, out, in); |
16e1a919 | 353 | |
1da4fc97 | 354 | kfree(nstr_list); |
16e1a919 | 355 | |
119aecba XL |
356 | if (!chunk) { |
357 | retval = -ENOMEM; | |
7f9d68ac | 358 | goto out; |
119aecba | 359 | } |
7f9d68ac XL |
360 | |
361 | if (out) { | |
362 | if (str_nums) | |
363 | for (i = 0; i < str_nums; i++) | |
364 | stream->out[str_list[i]].state = | |
365 | SCTP_STREAM_CLOSED; | |
366 | else | |
367 | for (i = 0; i < stream->outcnt; i++) | |
368 | stream->out[i].state = SCTP_STREAM_CLOSED; | |
369 | } | |
370 | ||
7f9d68ac XL |
371 | asoc->strreset_chunk = chunk; |
372 | sctp_chunk_hold(asoc->strreset_chunk); | |
373 | ||
374 | retval = sctp_send_reconf(asoc, chunk); | |
375 | if (retval) { | |
376 | sctp_chunk_put(asoc->strreset_chunk); | |
377 | asoc->strreset_chunk = NULL; | |
119aecba XL |
378 | if (!out) |
379 | goto out; | |
380 | ||
381 | if (str_nums) | |
382 | for (i = 0; i < str_nums; i++) | |
383 | stream->out[str_list[i]].state = | |
384 | SCTP_STREAM_OPEN; | |
385 | else | |
386 | for (i = 0; i < stream->outcnt; i++) | |
387 | stream->out[i].state = SCTP_STREAM_OPEN; | |
388 | ||
389 | goto out; | |
7f9d68ac XL |
390 | } |
391 | ||
119aecba XL |
392 | asoc->strreset_outstanding = out + in; |
393 | ||
7f9d68ac XL |
394 | out: |
395 | return retval; | |
396 | } | |
a92ce1a4 XL |
397 | |
398 | int sctp_send_reset_assoc(struct sctp_association *asoc) | |
399 | { | |
cee360ab | 400 | struct sctp_stream *stream = &asoc->stream; |
a92ce1a4 XL |
401 | struct sctp_chunk *chunk = NULL; |
402 | int retval; | |
403 | __u16 i; | |
404 | ||
405 | if (!asoc->peer.reconf_capable || | |
406 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
407 | return -ENOPROTOOPT; | |
408 | ||
409 | if (asoc->strreset_outstanding) | |
410 | return -EINPROGRESS; | |
411 | ||
5c6144a0 XL |
412 | if (!sctp_outq_is_empty(&asoc->outqueue)) |
413 | return -EAGAIN; | |
414 | ||
a92ce1a4 XL |
415 | chunk = sctp_make_strreset_tsnreq(asoc); |
416 | if (!chunk) | |
417 | return -ENOMEM; | |
418 | ||
419 | /* Block further xmit of data until this request is completed */ | |
cee360ab XL |
420 | for (i = 0; i < stream->outcnt; i++) |
421 | stream->out[i].state = SCTP_STREAM_CLOSED; | |
a92ce1a4 XL |
422 | |
423 | asoc->strreset_chunk = chunk; | |
424 | sctp_chunk_hold(asoc->strreset_chunk); | |
425 | ||
426 | retval = sctp_send_reconf(asoc, chunk); | |
427 | if (retval) { | |
428 | sctp_chunk_put(asoc->strreset_chunk); | |
429 | asoc->strreset_chunk = NULL; | |
430 | ||
cee360ab XL |
431 | for (i = 0; i < stream->outcnt; i++) |
432 | stream->out[i].state = SCTP_STREAM_OPEN; | |
a92ce1a4 XL |
433 | |
434 | return retval; | |
435 | } | |
436 | ||
437 | asoc->strreset_outstanding = 1; | |
438 | ||
439 | return 0; | |
440 | } | |
242bd2d5 XL |
441 | |
442 | int sctp_send_add_streams(struct sctp_association *asoc, | |
443 | struct sctp_add_streams *params) | |
444 | { | |
cee360ab | 445 | struct sctp_stream *stream = &asoc->stream; |
242bd2d5 | 446 | struct sctp_chunk *chunk = NULL; |
dc82673f | 447 | int retval; |
242bd2d5 XL |
448 | __u32 outcnt, incnt; |
449 | __u16 out, in; | |
450 | ||
451 | if (!asoc->peer.reconf_capable || | |
452 | !(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) { | |
453 | retval = -ENOPROTOOPT; | |
454 | goto out; | |
455 | } | |
456 | ||
457 | if (asoc->strreset_outstanding) { | |
458 | retval = -EINPROGRESS; | |
459 | goto out; | |
460 | } | |
461 | ||
462 | out = params->sas_outstrms; | |
463 | in = params->sas_instrms; | |
464 | outcnt = stream->outcnt + out; | |
465 | incnt = stream->incnt + in; | |
466 | if (outcnt > SCTP_MAX_STREAM || incnt > SCTP_MAX_STREAM || | |
467 | (!out && !in)) { | |
468 | retval = -EINVAL; | |
469 | goto out; | |
470 | } | |
471 | ||
472 | if (out) { | |
e090abd0 MRL |
473 | retval = sctp_stream_alloc_out(stream, outcnt, GFP_KERNEL); |
474 | if (retval) | |
242bd2d5 | 475 | goto out; |
242bd2d5 XL |
476 | } |
477 | ||
242bd2d5 | 478 | chunk = sctp_make_strreset_addstrm(asoc, out, in); |
dc82673f WY |
479 | if (!chunk) { |
480 | retval = -ENOMEM; | |
242bd2d5 | 481 | goto out; |
dc82673f | 482 | } |
242bd2d5 XL |
483 | |
484 | asoc->strreset_chunk = chunk; | |
485 | sctp_chunk_hold(asoc->strreset_chunk); | |
486 | ||
487 | retval = sctp_send_reconf(asoc, chunk); | |
488 | if (retval) { | |
489 | sctp_chunk_put(asoc->strreset_chunk); | |
490 | asoc->strreset_chunk = NULL; | |
491 | goto out; | |
492 | } | |
493 | ||
494 | stream->incnt = incnt; | |
495 | stream->outcnt = outcnt; | |
496 | ||
497 | asoc->strreset_outstanding = !!out + !!in; | |
498 | ||
499 | out: | |
500 | return retval; | |
501 | } | |
81054476 | 502 | |
3c918704 | 503 | static struct sctp_paramhdr *sctp_chunk_lookup_strreset_param( |
1da4fc97 | 504 | struct sctp_association *asoc, __be32 resp_seq, |
50a41591 | 505 | __be16 type) |
81054476 XL |
506 | { |
507 | struct sctp_chunk *chunk = asoc->strreset_chunk; | |
508 | struct sctp_reconf_chunk *hdr; | |
509 | union sctp_params param; | |
510 | ||
50a41591 | 511 | if (!chunk) |
81054476 XL |
512 | return NULL; |
513 | ||
514 | hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr; | |
515 | sctp_walk_params(param, hdr, params) { | |
516 | /* sctp_strreset_tsnreq is actually the basic structure | |
517 | * of all stream reconf params, so it's safe to use it | |
518 | * to access request_seq. | |
519 | */ | |
520 | struct sctp_strreset_tsnreq *req = param.v; | |
521 | ||
50a41591 XL |
522 | if ((!resp_seq || req->request_seq == resp_seq) && |
523 | (!type || type == req->param_hdr.type)) | |
81054476 XL |
524 | return param.v; |
525 | } | |
526 | ||
527 | return NULL; | |
528 | } | |
529 | ||
e4dc99c7 XL |
530 | static void sctp_update_strreset_result(struct sctp_association *asoc, |
531 | __u32 result) | |
532 | { | |
533 | asoc->strreset_result[1] = asoc->strreset_result[0]; | |
534 | asoc->strreset_result[0] = result; | |
535 | } | |
536 | ||
81054476 XL |
537 | struct sctp_chunk *sctp_process_strreset_outreq( |
538 | struct sctp_association *asoc, | |
539 | union sctp_params param, | |
540 | struct sctp_ulpevent **evp) | |
541 | { | |
542 | struct sctp_strreset_outreq *outreq = param.v; | |
cee360ab | 543 | struct sctp_stream *stream = &asoc->stream; |
81054476 | 544 | __u32 result = SCTP_STRRESET_DENIED; |
1da4fc97 XL |
545 | __u16 i, nums, flags = 0; |
546 | __be16 *str_p = NULL; | |
81054476 XL |
547 | __u32 request_seq; |
548 | ||
549 | request_seq = ntohl(outreq->request_seq); | |
550 | ||
551 | if (ntohl(outreq->send_reset_at_tsn) > | |
552 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map)) { | |
553 | result = SCTP_STRRESET_IN_PROGRESS; | |
e4dc99c7 | 554 | goto err; |
81054476 XL |
555 | } |
556 | ||
e4dc99c7 XL |
557 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
558 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
81054476 | 559 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
560 | goto err; |
561 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
562 | i = asoc->strreset_inseq - request_seq - 1; | |
563 | result = asoc->strreset_result[i]; | |
564 | goto err; | |
81054476 | 565 | } |
e4dc99c7 | 566 | asoc->strreset_inseq++; |
81054476 XL |
567 | |
568 | /* Check strreset_enable after inseq inc, as sender cannot tell | |
569 | * the peer doesn't enable strreset after receiving response with | |
570 | * result denied, as well as to keep consistent with bsd. | |
571 | */ | |
572 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
573 | goto out; | |
574 | ||
575 | if (asoc->strreset_chunk) { | |
50a41591 XL |
576 | if (!sctp_chunk_lookup_strreset_param( |
577 | asoc, outreq->response_seq, | |
578 | SCTP_PARAM_RESET_IN_REQUEST)) { | |
81054476 XL |
579 | /* same process with outstanding isn't 0 */ |
580 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
581 | goto out; | |
582 | } | |
583 | ||
584 | asoc->strreset_outstanding--; | |
585 | asoc->strreset_outseq++; | |
586 | ||
587 | if (!asoc->strreset_outstanding) { | |
50a41591 XL |
588 | struct sctp_transport *t; |
589 | ||
81054476 XL |
590 | t = asoc->strreset_chunk->transport; |
591 | if (del_timer(&t->reconf_timer)) | |
592 | sctp_transport_put(t); | |
593 | ||
594 | sctp_chunk_put(asoc->strreset_chunk); | |
595 | asoc->strreset_chunk = NULL; | |
596 | } | |
597 | ||
598 | flags = SCTP_STREAM_RESET_INCOMING_SSN; | |
599 | } | |
600 | ||
3aa623da | 601 | nums = (ntohs(param.p->length) - sizeof(*outreq)) / sizeof(__u16); |
81054476 XL |
602 | if (nums) { |
603 | str_p = outreq->list_of_streams; | |
604 | for (i = 0; i < nums; i++) { | |
605 | if (ntohs(str_p[i]) >= stream->incnt) { | |
606 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
607 | goto out; | |
608 | } | |
609 | } | |
610 | ||
611 | for (i = 0; i < nums; i++) | |
107e2425 | 612 | stream->in[ntohs(str_p[i])].mid = 0; |
81054476 XL |
613 | } else { |
614 | for (i = 0; i < stream->incnt; i++) | |
107e2425 | 615 | stream->in[i].mid = 0; |
81054476 XL |
616 | } |
617 | ||
618 | result = SCTP_STRRESET_PERFORMED; | |
619 | ||
620 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, | |
621 | flags | SCTP_STREAM_RESET_OUTGOING_SSN, nums, str_p, | |
622 | GFP_ATOMIC); | |
623 | ||
624 | out: | |
e4dc99c7 XL |
625 | sctp_update_strreset_result(asoc, result); |
626 | err: | |
81054476 XL |
627 | return sctp_make_strreset_resp(asoc, result, request_seq); |
628 | } | |
16e1a919 XL |
629 | |
630 | struct sctp_chunk *sctp_process_strreset_inreq( | |
631 | struct sctp_association *asoc, | |
632 | union sctp_params param, | |
633 | struct sctp_ulpevent **evp) | |
634 | { | |
635 | struct sctp_strreset_inreq *inreq = param.v; | |
cee360ab | 636 | struct sctp_stream *stream = &asoc->stream; |
16e1a919 XL |
637 | __u32 result = SCTP_STRRESET_DENIED; |
638 | struct sctp_chunk *chunk = NULL; | |
16e1a919 | 639 | __u32 request_seq; |
1da4fc97 XL |
640 | __u16 i, nums; |
641 | __be16 *str_p; | |
16e1a919 XL |
642 | |
643 | request_seq = ntohl(inreq->request_seq); | |
d0f025e6 XL |
644 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
645 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
16e1a919 | 646 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
647 | goto err; |
648 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
649 | i = asoc->strreset_inseq - request_seq - 1; | |
650 | result = asoc->strreset_result[i]; | |
651 | if (result == SCTP_STRRESET_PERFORMED) | |
652 | return NULL; | |
653 | goto err; | |
16e1a919 | 654 | } |
d0f025e6 | 655 | asoc->strreset_inseq++; |
16e1a919 XL |
656 | |
657 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
658 | goto out; | |
659 | ||
660 | if (asoc->strreset_outstanding) { | |
661 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
662 | goto out; | |
663 | } | |
664 | ||
3aa623da | 665 | nums = (ntohs(param.p->length) - sizeof(*inreq)) / sizeof(__u16); |
16e1a919 XL |
666 | str_p = inreq->list_of_streams; |
667 | for (i = 0; i < nums; i++) { | |
668 | if (ntohs(str_p[i]) >= stream->outcnt) { | |
669 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
670 | goto out; | |
671 | } | |
672 | } | |
673 | ||
d570a59c XL |
674 | if (!sctp_stream_outq_is_empty(stream, nums, str_p)) { |
675 | result = SCTP_STRRESET_IN_PROGRESS; | |
676 | asoc->strreset_inseq--; | |
677 | goto err; | |
678 | } | |
679 | ||
16e1a919 XL |
680 | chunk = sctp_make_strreset_req(asoc, nums, str_p, 1, 0); |
681 | if (!chunk) | |
682 | goto out; | |
683 | ||
684 | if (nums) | |
685 | for (i = 0; i < nums; i++) | |
686 | stream->out[ntohs(str_p[i])].state = | |
687 | SCTP_STREAM_CLOSED; | |
688 | else | |
689 | for (i = 0; i < stream->outcnt; i++) | |
690 | stream->out[i].state = SCTP_STREAM_CLOSED; | |
691 | ||
692 | asoc->strreset_chunk = chunk; | |
693 | asoc->strreset_outstanding = 1; | |
694 | sctp_chunk_hold(asoc->strreset_chunk); | |
695 | ||
d0f025e6 XL |
696 | result = SCTP_STRRESET_PERFORMED; |
697 | ||
16e1a919 XL |
698 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, |
699 | SCTP_STREAM_RESET_INCOMING_SSN, nums, str_p, GFP_ATOMIC); | |
700 | ||
701 | out: | |
d0f025e6 XL |
702 | sctp_update_strreset_result(asoc, result); |
703 | err: | |
16e1a919 XL |
704 | if (!chunk) |
705 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
706 | ||
707 | return chunk; | |
708 | } | |
692787ce XL |
709 | |
710 | struct sctp_chunk *sctp_process_strreset_tsnreq( | |
711 | struct sctp_association *asoc, | |
712 | union sctp_params param, | |
713 | struct sctp_ulpevent **evp) | |
714 | { | |
715 | __u32 init_tsn = 0, next_tsn = 0, max_tsn_seen; | |
716 | struct sctp_strreset_tsnreq *tsnreq = param.v; | |
cee360ab | 717 | struct sctp_stream *stream = &asoc->stream; |
692787ce XL |
718 | __u32 result = SCTP_STRRESET_DENIED; |
719 | __u32 request_seq; | |
720 | __u16 i; | |
721 | ||
722 | request_seq = ntohl(tsnreq->request_seq); | |
6c801387 XL |
723 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
724 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
692787ce | 725 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
6c801387 XL |
726 | goto err; |
727 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
728 | i = asoc->strreset_inseq - request_seq - 1; | |
729 | result = asoc->strreset_result[i]; | |
730 | if (result == SCTP_STRRESET_PERFORMED) { | |
52a39589 | 731 | next_tsn = asoc->ctsn_ack_point + 1; |
6c801387 XL |
732 | init_tsn = |
733 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + 1; | |
734 | } | |
735 | goto err; | |
692787ce | 736 | } |
5c6144a0 XL |
737 | |
738 | if (!sctp_outq_is_empty(&asoc->outqueue)) { | |
739 | result = SCTP_STRRESET_IN_PROGRESS; | |
740 | goto err; | |
741 | } | |
742 | ||
6c801387 | 743 | asoc->strreset_inseq++; |
692787ce XL |
744 | |
745 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
746 | goto out; | |
747 | ||
748 | if (asoc->strreset_outstanding) { | |
749 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
750 | goto out; | |
751 | } | |
752 | ||
159f2a74 XL |
753 | /* G4: The same processing as though a FWD-TSN chunk (as defined in |
754 | * [RFC3758]) with all streams affected and a new cumulative TSN | |
755 | * ACK of the Receiver's Next TSN minus 1 were received MUST be | |
756 | * performed. | |
692787ce XL |
757 | */ |
758 | max_tsn_seen = sctp_tsnmap_get_max_tsn_seen(&asoc->peer.tsn_map); | |
47b20a88 | 759 | asoc->stream.si->report_ftsn(&asoc->ulpq, max_tsn_seen); |
692787ce XL |
760 | |
761 | /* G1: Compute an appropriate value for the Receiver's Next TSN -- the | |
762 | * TSN that the peer should use to send the next DATA chunk. The | |
763 | * value SHOULD be the smallest TSN not acknowledged by the | |
764 | * receiver of the request plus 2^31. | |
765 | */ | |
766 | init_tsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + (1 << 31); | |
767 | sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_INITIAL, | |
768 | init_tsn, GFP_ATOMIC); | |
769 | ||
159f2a74 XL |
770 | /* G3: The same processing as though a SACK chunk with no gap report |
771 | * and a cumulative TSN ACK of the Sender's Next TSN minus 1 were | |
772 | * received MUST be performed. | |
692787ce XL |
773 | */ |
774 | sctp_outq_free(&asoc->outqueue); | |
775 | ||
776 | /* G2: Compute an appropriate value for the local endpoint's next TSN, | |
777 | * i.e., the next TSN assigned by the receiver of the SSN/TSN reset | |
778 | * chunk. The value SHOULD be the highest TSN sent by the receiver | |
779 | * of the request plus 1. | |
780 | */ | |
781 | next_tsn = asoc->next_tsn; | |
782 | asoc->ctsn_ack_point = next_tsn - 1; | |
783 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
784 | ||
785 | /* G5: The next expected and outgoing SSNs MUST be reset to 0 for all | |
786 | * incoming and outgoing streams. | |
787 | */ | |
107e2425 XL |
788 | for (i = 0; i < stream->outcnt; i++) { |
789 | stream->out[i].mid = 0; | |
790 | stream->out[i].mid_uo = 0; | |
791 | } | |
692787ce | 792 | for (i = 0; i < stream->incnt; i++) |
107e2425 | 793 | stream->in[i].mid = 0; |
692787ce XL |
794 | |
795 | result = SCTP_STRRESET_PERFORMED; | |
796 | ||
797 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, 0, init_tsn, | |
798 | next_tsn, GFP_ATOMIC); | |
799 | ||
800 | out: | |
6c801387 XL |
801 | sctp_update_strreset_result(asoc, result); |
802 | err: | |
692787ce XL |
803 | return sctp_make_strreset_tsnresp(asoc, result, request_seq, |
804 | next_tsn, init_tsn); | |
805 | } | |
50a41591 XL |
806 | |
807 | struct sctp_chunk *sctp_process_strreset_addstrm_out( | |
808 | struct sctp_association *asoc, | |
809 | union sctp_params param, | |
810 | struct sctp_ulpevent **evp) | |
811 | { | |
812 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 813 | struct sctp_stream *stream = &asoc->stream; |
50a41591 | 814 | __u32 result = SCTP_STRRESET_DENIED; |
50a41591 | 815 | __u32 request_seq, incnt; |
e4dc99c7 | 816 | __u16 in, i; |
50a41591 XL |
817 | |
818 | request_seq = ntohl(addstrm->request_seq); | |
e4dc99c7 XL |
819 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
820 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
50a41591 | 821 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
822 | goto err; |
823 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
824 | i = asoc->strreset_inseq - request_seq - 1; | |
825 | result = asoc->strreset_result[i]; | |
826 | goto err; | |
50a41591 | 827 | } |
e4dc99c7 | 828 | asoc->strreset_inseq++; |
50a41591 XL |
829 | |
830 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
831 | goto out; | |
832 | ||
833 | if (asoc->strreset_chunk) { | |
834 | if (!sctp_chunk_lookup_strreset_param( | |
835 | asoc, 0, SCTP_PARAM_RESET_ADD_IN_STREAMS)) { | |
836 | /* same process with outstanding isn't 0 */ | |
837 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
838 | goto out; | |
839 | } | |
840 | ||
841 | asoc->strreset_outstanding--; | |
842 | asoc->strreset_outseq++; | |
843 | ||
844 | if (!asoc->strreset_outstanding) { | |
845 | struct sctp_transport *t; | |
846 | ||
847 | t = asoc->strreset_chunk->transport; | |
848 | if (del_timer(&t->reconf_timer)) | |
849 | sctp_transport_put(t); | |
850 | ||
851 | sctp_chunk_put(asoc->strreset_chunk); | |
852 | asoc->strreset_chunk = NULL; | |
853 | } | |
854 | } | |
855 | ||
856 | in = ntohs(addstrm->number_of_streams); | |
857 | incnt = stream->incnt + in; | |
858 | if (!in || incnt > SCTP_MAX_STREAM) | |
859 | goto out; | |
860 | ||
1fdb8d8f | 861 | if (sctp_stream_alloc_in(stream, incnt, GFP_ATOMIC)) |
50a41591 XL |
862 | goto out; |
863 | ||
50a41591 XL |
864 | stream->incnt = incnt; |
865 | ||
866 | result = SCTP_STRRESET_PERFORMED; | |
867 | ||
868 | *evp = sctp_ulpevent_make_stream_change_event(asoc, | |
869 | 0, ntohs(addstrm->number_of_streams), 0, GFP_ATOMIC); | |
870 | ||
871 | out: | |
e4dc99c7 XL |
872 | sctp_update_strreset_result(asoc, result); |
873 | err: | |
50a41591 XL |
874 | return sctp_make_strreset_resp(asoc, result, request_seq); |
875 | } | |
c5c4ebb3 XL |
876 | |
877 | struct sctp_chunk *sctp_process_strreset_addstrm_in( | |
878 | struct sctp_association *asoc, | |
879 | union sctp_params param, | |
880 | struct sctp_ulpevent **evp) | |
881 | { | |
882 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 883 | struct sctp_stream *stream = &asoc->stream; |
c5c4ebb3 | 884 | __u32 result = SCTP_STRRESET_DENIED; |
c5c4ebb3 XL |
885 | struct sctp_chunk *chunk = NULL; |
886 | __u32 request_seq, outcnt; | |
d0f025e6 | 887 | __u16 out, i; |
e090abd0 | 888 | int ret; |
c5c4ebb3 XL |
889 | |
890 | request_seq = ntohl(addstrm->request_seq); | |
d0f025e6 XL |
891 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
892 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
c5c4ebb3 | 893 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
894 | goto err; |
895 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
896 | i = asoc->strreset_inseq - request_seq - 1; | |
897 | result = asoc->strreset_result[i]; | |
898 | if (result == SCTP_STRRESET_PERFORMED) | |
899 | return NULL; | |
900 | goto err; | |
c5c4ebb3 | 901 | } |
d0f025e6 | 902 | asoc->strreset_inseq++; |
c5c4ebb3 XL |
903 | |
904 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
905 | goto out; | |
906 | ||
907 | if (asoc->strreset_outstanding) { | |
908 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
909 | goto out; | |
910 | } | |
911 | ||
912 | out = ntohs(addstrm->number_of_streams); | |
913 | outcnt = stream->outcnt + out; | |
914 | if (!out || outcnt > SCTP_MAX_STREAM) | |
915 | goto out; | |
916 | ||
e090abd0 MRL |
917 | ret = sctp_stream_alloc_out(stream, outcnt, GFP_ATOMIC); |
918 | if (ret) | |
c5c4ebb3 XL |
919 | goto out; |
920 | ||
c5c4ebb3 XL |
921 | chunk = sctp_make_strreset_addstrm(asoc, out, 0); |
922 | if (!chunk) | |
923 | goto out; | |
924 | ||
925 | asoc->strreset_chunk = chunk; | |
926 | asoc->strreset_outstanding = 1; | |
927 | sctp_chunk_hold(asoc->strreset_chunk); | |
928 | ||
929 | stream->outcnt = outcnt; | |
930 | ||
d0f025e6 XL |
931 | result = SCTP_STRRESET_PERFORMED; |
932 | ||
c5c4ebb3 XL |
933 | *evp = sctp_ulpevent_make_stream_change_event(asoc, |
934 | 0, 0, ntohs(addstrm->number_of_streams), GFP_ATOMIC); | |
935 | ||
936 | out: | |
d0f025e6 XL |
937 | sctp_update_strreset_result(asoc, result); |
938 | err: | |
c5c4ebb3 XL |
939 | if (!chunk) |
940 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
941 | ||
942 | return chunk; | |
943 | } | |
11ae76e6 XL |
944 | |
945 | struct sctp_chunk *sctp_process_strreset_resp( | |
946 | struct sctp_association *asoc, | |
947 | union sctp_params param, | |
948 | struct sctp_ulpevent **evp) | |
949 | { | |
cee360ab | 950 | struct sctp_stream *stream = &asoc->stream; |
11ae76e6 | 951 | struct sctp_strreset_resp *resp = param.v; |
11ae76e6 XL |
952 | struct sctp_transport *t; |
953 | __u16 i, nums, flags = 0; | |
3c918704 | 954 | struct sctp_paramhdr *req; |
11ae76e6 XL |
955 | __u32 result; |
956 | ||
957 | req = sctp_chunk_lookup_strreset_param(asoc, resp->response_seq, 0); | |
958 | if (!req) | |
959 | return NULL; | |
960 | ||
961 | result = ntohl(resp->result); | |
962 | if (result != SCTP_STRRESET_PERFORMED) { | |
963 | /* if in progress, do nothing but retransmit */ | |
964 | if (result == SCTP_STRRESET_IN_PROGRESS) | |
965 | return NULL; | |
966 | else if (result == SCTP_STRRESET_DENIED) | |
967 | flags = SCTP_STREAM_RESET_DENIED; | |
968 | else | |
969 | flags = SCTP_STREAM_RESET_FAILED; | |
970 | } | |
971 | ||
972 | if (req->type == SCTP_PARAM_RESET_OUT_REQUEST) { | |
973 | struct sctp_strreset_outreq *outreq; | |
1da4fc97 | 974 | __be16 *str_p; |
11ae76e6 XL |
975 | |
976 | outreq = (struct sctp_strreset_outreq *)req; | |
edb12f2d | 977 | str_p = outreq->list_of_streams; |
3aa623da XL |
978 | nums = (ntohs(outreq->param_hdr.length) - sizeof(*outreq)) / |
979 | sizeof(__u16); | |
11ae76e6 XL |
980 | |
981 | if (result == SCTP_STRRESET_PERFORMED) { | |
982 | if (nums) { | |
107e2425 XL |
983 | for (i = 0; i < nums; i++) { |
984 | stream->out[ntohs(str_p[i])].mid = 0; | |
985 | stream->out[ntohs(str_p[i])].mid_uo = 0; | |
986 | } | |
11ae76e6 | 987 | } else { |
107e2425 XL |
988 | for (i = 0; i < stream->outcnt; i++) { |
989 | stream->out[i].mid = 0; | |
990 | stream->out[i].mid_uo = 0; | |
991 | } | |
11ae76e6 XL |
992 | } |
993 | ||
994 | flags = SCTP_STREAM_RESET_OUTGOING_SSN; | |
995 | } | |
996 | ||
997 | for (i = 0; i < stream->outcnt; i++) | |
998 | stream->out[i].state = SCTP_STREAM_OPEN; | |
999 | ||
1000 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, | |
1001 | nums, str_p, GFP_ATOMIC); | |
1002 | } else if (req->type == SCTP_PARAM_RESET_IN_REQUEST) { | |
1003 | struct sctp_strreset_inreq *inreq; | |
1da4fc97 | 1004 | __be16 *str_p; |
11ae76e6 XL |
1005 | |
1006 | /* if the result is performed, it's impossible for inreq */ | |
1007 | if (result == SCTP_STRRESET_PERFORMED) | |
1008 | return NULL; | |
1009 | ||
1010 | inreq = (struct sctp_strreset_inreq *)req; | |
edb12f2d | 1011 | str_p = inreq->list_of_streams; |
3aa623da XL |
1012 | nums = (ntohs(inreq->param_hdr.length) - sizeof(*inreq)) / |
1013 | sizeof(__u16); | |
11ae76e6 | 1014 | |
11ae76e6 XL |
1015 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, |
1016 | nums, str_p, GFP_ATOMIC); | |
1017 | } else if (req->type == SCTP_PARAM_RESET_TSN_REQUEST) { | |
1018 | struct sctp_strreset_resptsn *resptsn; | |
1019 | __u32 stsn, rtsn; | |
1020 | ||
1021 | /* check for resptsn, as sctp_verify_reconf didn't do it*/ | |
1022 | if (ntohs(param.p->length) != sizeof(*resptsn)) | |
1023 | return NULL; | |
1024 | ||
1025 | resptsn = (struct sctp_strreset_resptsn *)resp; | |
1026 | stsn = ntohl(resptsn->senders_next_tsn); | |
1027 | rtsn = ntohl(resptsn->receivers_next_tsn); | |
1028 | ||
1029 | if (result == SCTP_STRRESET_PERFORMED) { | |
1030 | __u32 mtsn = sctp_tsnmap_get_max_tsn_seen( | |
1031 | &asoc->peer.tsn_map); | |
159f2a74 | 1032 | LIST_HEAD(temp); |
11ae76e6 | 1033 | |
47b20a88 | 1034 | asoc->stream.si->report_ftsn(&asoc->ulpq, mtsn); |
11ae76e6 XL |
1035 | |
1036 | sctp_tsnmap_init(&asoc->peer.tsn_map, | |
1037 | SCTP_TSN_MAP_INITIAL, | |
1038 | stsn, GFP_ATOMIC); | |
1039 | ||
159f2a74 XL |
1040 | /* Clean up sacked and abandoned queues only. As the |
1041 | * out_chunk_list may not be empty, splice it to temp, | |
1042 | * then get it back after sctp_outq_free is done. | |
1043 | */ | |
1044 | list_splice_init(&asoc->outqueue.out_chunk_list, &temp); | |
11ae76e6 | 1045 | sctp_outq_free(&asoc->outqueue); |
159f2a74 | 1046 | list_splice_init(&temp, &asoc->outqueue.out_chunk_list); |
11ae76e6 XL |
1047 | |
1048 | asoc->next_tsn = rtsn; | |
1049 | asoc->ctsn_ack_point = asoc->next_tsn - 1; | |
1050 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
1051 | ||
107e2425 XL |
1052 | for (i = 0; i < stream->outcnt; i++) { |
1053 | stream->out[i].mid = 0; | |
1054 | stream->out[i].mid_uo = 0; | |
1055 | } | |
11ae76e6 | 1056 | for (i = 0; i < stream->incnt; i++) |
107e2425 | 1057 | stream->in[i].mid = 0; |
11ae76e6 XL |
1058 | } |
1059 | ||
1060 | for (i = 0; i < stream->outcnt; i++) | |
1061 | stream->out[i].state = SCTP_STREAM_OPEN; | |
1062 | ||
1063 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, flags, | |
1064 | stsn, rtsn, GFP_ATOMIC); | |
1065 | } else if (req->type == SCTP_PARAM_RESET_ADD_OUT_STREAMS) { | |
1066 | struct sctp_strreset_addstrm *addstrm; | |
1067 | __u16 number; | |
1068 | ||
1069 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1070 | nums = ntohs(addstrm->number_of_streams); | |
1071 | number = stream->outcnt - nums; | |
1072 | ||
1073 | if (result == SCTP_STRRESET_PERFORMED) | |
1074 | for (i = number; i < stream->outcnt; i++) | |
1075 | stream->out[i].state = SCTP_STREAM_OPEN; | |
1076 | else | |
1077 | stream->outcnt = number; | |
1078 | ||
1079 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1080 | 0, nums, GFP_ATOMIC); | |
1081 | } else if (req->type == SCTP_PARAM_RESET_ADD_IN_STREAMS) { | |
1082 | struct sctp_strreset_addstrm *addstrm; | |
1083 | ||
1084 | /* if the result is performed, it's impossible for addstrm in | |
1085 | * request. | |
1086 | */ | |
1087 | if (result == SCTP_STRRESET_PERFORMED) | |
1088 | return NULL; | |
1089 | ||
1090 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1091 | nums = ntohs(addstrm->number_of_streams); | |
1092 | ||
1093 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1094 | nums, 0, GFP_ATOMIC); | |
1095 | } | |
1096 | ||
1097 | asoc->strreset_outstanding--; | |
1098 | asoc->strreset_outseq++; | |
1099 | ||
1100 | /* remove everything for this reconf request */ | |
1101 | if (!asoc->strreset_outstanding) { | |
1102 | t = asoc->strreset_chunk->transport; | |
1103 | if (del_timer(&t->reconf_timer)) | |
1104 | sctp_transport_put(t); | |
1105 | ||
1106 | sctp_chunk_put(asoc->strreset_chunk); | |
1107 | asoc->strreset_chunk = NULL; | |
1108 | } | |
1109 | ||
1110 | return NULL; | |
1111 | } |