Commit | Line | Data |
---|---|---|
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++) { | |
0d493b4d KK |
81 | kfree(SCTP_SO(new, i)->ext); |
82 | SCTP_SO(new, i)->ext = SCTP_SO(stream, i)->ext; | |
83 | SCTP_SO(stream, i)->ext = NULL; | |
5bbbbe32 MRL |
84 | } |
85 | } | |
86 | ||
af98c5a7 | 87 | for (i = outcnt; i < stream->outcnt; i++) { |
0d493b4d | 88 | kfree(SCTP_SO(stream, i)->ext); |
af98c5a7 XL |
89 | SCTP_SO(stream, i)->ext = NULL; |
90 | } | |
5bbbbe32 | 91 | } |
a8386317 | 92 | |
e090abd0 MRL |
93 | static int sctp_stream_alloc_out(struct sctp_stream *stream, __u16 outcnt, |
94 | gfp_t gfp) | |
95 | { | |
2075e50c | 96 | int ret; |
e090abd0 | 97 | |
2075e50c KO |
98 | if (outcnt <= stream->outcnt) |
99 | return 0; | |
cfe4bd7a | 100 | |
2075e50c KO |
101 | ret = genradix_prealloc(&stream->out, outcnt, gfp); |
102 | if (ret) | |
103 | return ret; | |
e090abd0 | 104 | |
2075e50c | 105 | stream->outcnt = outcnt; |
e090abd0 MRL |
106 | return 0; |
107 | } | |
108 | ||
1fdb8d8f MRL |
109 | static int sctp_stream_alloc_in(struct sctp_stream *stream, __u16 incnt, |
110 | gfp_t gfp) | |
111 | { | |
2075e50c | 112 | int ret; |
1fdb8d8f | 113 | |
2075e50c KO |
114 | if (incnt <= stream->incnt) |
115 | return 0; | |
1fdb8d8f | 116 | |
2075e50c KO |
117 | ret = genradix_prealloc(&stream->in, incnt, gfp); |
118 | if (ret) | |
119 | return ret; | |
1fdb8d8f | 120 | |
2075e50c | 121 | stream->incnt = incnt; |
1fdb8d8f MRL |
122 | return 0; |
123 | } | |
124 | ||
ff356414 XL |
125 | int sctp_stream_init(struct sctp_stream *stream, __u16 outcnt, __u16 incnt, |
126 | gfp_t gfp) | |
a8386317 | 127 | { |
5bbbbe32 MRL |
128 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
129 | int i, ret = 0; | |
3dbcc105 | 130 | |
1ae2eaaa MRL |
131 | gfp |= __GFP_NOWARN; |
132 | ||
3dbcc105 | 133 | /* Initial stream->out size may be very big, so free it and alloc |
1ae2eaaa | 134 | * a new one with new outcnt to save memory if needed. |
3dbcc105 | 135 | */ |
1ae2eaaa MRL |
136 | if (outcnt == stream->outcnt) |
137 | goto in; | |
138 | ||
5bbbbe32 MRL |
139 | /* Filter out chunks queued on streams that won't exist anymore */ |
140 | sched->unsched_all(stream); | |
141 | sctp_stream_outq_migrate(stream, NULL, outcnt); | |
142 | sched->sched_all(stream); | |
143 | ||
79d08951 MRL |
144 | ret = sctp_stream_alloc_out(stream, outcnt, gfp); |
145 | if (ret) | |
146 | goto out; | |
3dbcc105 XL |
147 | |
148 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 149 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
3dbcc105 | 150 | |
1ae2eaaa | 151 | in: |
0c3f6f65 | 152 | sctp_stream_interleave_init(stream); |
ff356414 | 153 | if (!incnt) |
5bbbbe32 | 154 | goto out; |
ff356414 | 155 | |
79d08951 MRL |
156 | ret = sctp_stream_alloc_in(stream, incnt, gfp); |
157 | if (ret) { | |
158 | sched->free(stream); | |
2075e50c | 159 | genradix_free(&stream->out); |
79d08951 MRL |
160 | stream->outcnt = 0; |
161 | goto out; | |
a8386317 XL |
162 | } |
163 | ||
5bbbbe32 MRL |
164 | out: |
165 | return ret; | |
a8386317 XL |
166 | } |
167 | ||
f952be79 MRL |
168 | int sctp_stream_init_ext(struct sctp_stream *stream, __u16 sid) |
169 | { | |
170 | struct sctp_stream_out_ext *soute; | |
171 | ||
172 | soute = kzalloc(sizeof(*soute), GFP_KERNEL); | |
173 | if (!soute) | |
174 | return -ENOMEM; | |
05364ca0 | 175 | SCTP_SO(stream, sid)->ext = soute; |
f952be79 | 176 | |
5bbbbe32 | 177 | return sctp_sched_init_sid(stream, sid, GFP_KERNEL); |
f952be79 MRL |
178 | } |
179 | ||
a8386317 XL |
180 | void sctp_stream_free(struct sctp_stream *stream) |
181 | { | |
5bbbbe32 | 182 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
f952be79 MRL |
183 | int i; |
184 | ||
5bbbbe32 | 185 | sched->free(stream); |
f952be79 | 186 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 187 | kfree(SCTP_SO(stream, i)->ext); |
2075e50c KO |
188 | genradix_free(&stream->out); |
189 | genradix_free(&stream->in); | |
a8386317 XL |
190 | } |
191 | ||
192 | void sctp_stream_clear(struct sctp_stream *stream) | |
193 | { | |
194 | int i; | |
195 | ||
107e2425 | 196 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
197 | SCTP_SO(stream, i)->mid = 0; |
198 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 199 | } |
a8386317 XL |
200 | |
201 | for (i = 0; i < stream->incnt; i++) | |
05364ca0 | 202 | SCTP_SI(stream, i)->mid = 0; |
a8386317 | 203 | } |
7f9d68ac | 204 | |
cee360ab XL |
205 | void sctp_stream_update(struct sctp_stream *stream, struct sctp_stream *new) |
206 | { | |
5bbbbe32 MRL |
207 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
208 | ||
209 | sched->unsched_all(stream); | |
210 | sctp_stream_outq_migrate(stream, new, new->outcnt); | |
cee360ab XL |
211 | sctp_stream_free(stream); |
212 | ||
213 | stream->out = new->out; | |
214 | stream->in = new->in; | |
215 | stream->outcnt = new->outcnt; | |
216 | stream->incnt = new->incnt; | |
217 | ||
5bbbbe32 MRL |
218 | sched->sched_all(stream); |
219 | ||
2075e50c KO |
220 | new->out.tree.root = NULL; |
221 | new->in.tree.root = NULL; | |
6a9a27d5 XL |
222 | new->outcnt = 0; |
223 | new->incnt = 0; | |
cee360ab XL |
224 | } |
225 | ||
7f9d68ac XL |
226 | static int sctp_send_reconf(struct sctp_association *asoc, |
227 | struct sctp_chunk *chunk) | |
228 | { | |
229 | struct net *net = sock_net(asoc->base.sk); | |
230 | int retval = 0; | |
231 | ||
232 | retval = sctp_primitive_RECONF(net, asoc, chunk); | |
233 | if (retval) | |
234 | sctp_chunk_free(chunk); | |
235 | ||
236 | return retval; | |
237 | } | |
238 | ||
d570a59c XL |
239 | static bool sctp_stream_outq_is_empty(struct sctp_stream *stream, |
240 | __u16 str_nums, __be16 *str_list) | |
241 | { | |
242 | struct sctp_association *asoc; | |
243 | __u16 i; | |
244 | ||
245 | asoc = container_of(stream, struct sctp_association, stream); | |
246 | if (!asoc->outqueue.out_qlen) | |
247 | return true; | |
248 | ||
249 | if (!str_nums) | |
250 | return false; | |
251 | ||
252 | for (i = 0; i < str_nums; i++) { | |
253 | __u16 sid = ntohs(str_list[i]); | |
254 | ||
05364ca0 KK |
255 | if (SCTP_SO(stream, sid)->ext && |
256 | !list_empty(&SCTP_SO(stream, sid)->ext->outq)) | |
d570a59c XL |
257 | return false; |
258 | } | |
259 | ||
260 | return true; | |
261 | } | |
262 | ||
7f9d68ac XL |
263 | int sctp_send_reset_streams(struct sctp_association *asoc, |
264 | struct sctp_reset_streams *params) | |
265 | { | |
cee360ab | 266 | struct sctp_stream *stream = &asoc->stream; |
7f9d68ac XL |
267 | __u16 i, str_nums, *str_list; |
268 | struct sctp_chunk *chunk; | |
269 | int retval = -EINVAL; | |
1da4fc97 | 270 | __be16 *nstr_list; |
7f9d68ac XL |
271 | bool out, in; |
272 | ||
273 | if (!asoc->peer.reconf_capable || | |
274 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) { | |
275 | retval = -ENOPROTOOPT; | |
276 | goto out; | |
277 | } | |
278 | ||
279 | if (asoc->strreset_outstanding) { | |
280 | retval = -EINPROGRESS; | |
281 | goto out; | |
282 | } | |
283 | ||
284 | out = params->srs_flags & SCTP_STREAM_RESET_OUTGOING; | |
285 | in = params->srs_flags & SCTP_STREAM_RESET_INCOMING; | |
286 | if (!out && !in) | |
287 | goto out; | |
288 | ||
289 | str_nums = params->srs_number_streams; | |
290 | str_list = params->srs_stream_list; | |
423852f8 XL |
291 | if (str_nums) { |
292 | int param_len = 0; | |
293 | ||
294 | if (out) { | |
295 | for (i = 0; i < str_nums; i++) | |
296 | if (str_list[i] >= stream->outcnt) | |
297 | goto out; | |
298 | ||
299 | param_len = str_nums * sizeof(__u16) + | |
300 | sizeof(struct sctp_strreset_outreq); | |
301 | } | |
302 | ||
303 | if (in) { | |
304 | for (i = 0; i < str_nums; i++) | |
305 | if (str_list[i] >= stream->incnt) | |
306 | goto out; | |
307 | ||
308 | param_len += str_nums * sizeof(__u16) + | |
309 | sizeof(struct sctp_strreset_inreq); | |
310 | } | |
311 | ||
312 | if (param_len > SCTP_MAX_CHUNK_LEN - | |
313 | sizeof(struct sctp_reconf_chunk)) | |
314 | goto out; | |
315 | } | |
7f9d68ac | 316 | |
1da4fc97 XL |
317 | nstr_list = kcalloc(str_nums, sizeof(__be16), GFP_KERNEL); |
318 | if (!nstr_list) { | |
319 | retval = -ENOMEM; | |
320 | goto out; | |
321 | } | |
322 | ||
16e1a919 | 323 | for (i = 0; i < str_nums; i++) |
1da4fc97 | 324 | nstr_list[i] = htons(str_list[i]); |
16e1a919 | 325 | |
d570a59c XL |
326 | if (out && !sctp_stream_outq_is_empty(stream, str_nums, nstr_list)) { |
327 | retval = -EAGAIN; | |
328 | goto out; | |
329 | } | |
330 | ||
1da4fc97 | 331 | chunk = sctp_make_strreset_req(asoc, str_nums, nstr_list, out, in); |
16e1a919 | 332 | |
1da4fc97 | 333 | kfree(nstr_list); |
16e1a919 | 334 | |
119aecba XL |
335 | if (!chunk) { |
336 | retval = -ENOMEM; | |
7f9d68ac | 337 | goto out; |
119aecba | 338 | } |
7f9d68ac XL |
339 | |
340 | if (out) { | |
341 | if (str_nums) | |
342 | for (i = 0; i < str_nums; i++) | |
05364ca0 | 343 | SCTP_SO(stream, str_list[i])->state = |
7f9d68ac XL |
344 | SCTP_STREAM_CLOSED; |
345 | else | |
346 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 347 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
7f9d68ac XL |
348 | } |
349 | ||
7f9d68ac XL |
350 | asoc->strreset_chunk = chunk; |
351 | sctp_chunk_hold(asoc->strreset_chunk); | |
352 | ||
353 | retval = sctp_send_reconf(asoc, chunk); | |
354 | if (retval) { | |
355 | sctp_chunk_put(asoc->strreset_chunk); | |
356 | asoc->strreset_chunk = NULL; | |
119aecba XL |
357 | if (!out) |
358 | goto out; | |
359 | ||
360 | if (str_nums) | |
361 | for (i = 0; i < str_nums; i++) | |
05364ca0 | 362 | SCTP_SO(stream, str_list[i])->state = |
119aecba XL |
363 | SCTP_STREAM_OPEN; |
364 | else | |
365 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 366 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
119aecba XL |
367 | |
368 | goto out; | |
7f9d68ac XL |
369 | } |
370 | ||
119aecba XL |
371 | asoc->strreset_outstanding = out + in; |
372 | ||
7f9d68ac XL |
373 | out: |
374 | return retval; | |
375 | } | |
a92ce1a4 XL |
376 | |
377 | int sctp_send_reset_assoc(struct sctp_association *asoc) | |
378 | { | |
cee360ab | 379 | struct sctp_stream *stream = &asoc->stream; |
a92ce1a4 XL |
380 | struct sctp_chunk *chunk = NULL; |
381 | int retval; | |
382 | __u16 i; | |
383 | ||
384 | if (!asoc->peer.reconf_capable || | |
385 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
386 | return -ENOPROTOOPT; | |
387 | ||
388 | if (asoc->strreset_outstanding) | |
389 | return -EINPROGRESS; | |
390 | ||
5c6144a0 XL |
391 | if (!sctp_outq_is_empty(&asoc->outqueue)) |
392 | return -EAGAIN; | |
393 | ||
a92ce1a4 XL |
394 | chunk = sctp_make_strreset_tsnreq(asoc); |
395 | if (!chunk) | |
396 | return -ENOMEM; | |
397 | ||
398 | /* Block further xmit of data until this request is completed */ | |
cee360ab | 399 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 400 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
a92ce1a4 XL |
401 | |
402 | asoc->strreset_chunk = chunk; | |
403 | sctp_chunk_hold(asoc->strreset_chunk); | |
404 | ||
405 | retval = sctp_send_reconf(asoc, chunk); | |
406 | if (retval) { | |
407 | sctp_chunk_put(asoc->strreset_chunk); | |
408 | asoc->strreset_chunk = NULL; | |
409 | ||
cee360ab | 410 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 411 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
a92ce1a4 XL |
412 | |
413 | return retval; | |
414 | } | |
415 | ||
416 | asoc->strreset_outstanding = 1; | |
417 | ||
418 | return 0; | |
419 | } | |
242bd2d5 XL |
420 | |
421 | int sctp_send_add_streams(struct sctp_association *asoc, | |
422 | struct sctp_add_streams *params) | |
423 | { | |
cee360ab | 424 | struct sctp_stream *stream = &asoc->stream; |
242bd2d5 | 425 | struct sctp_chunk *chunk = NULL; |
dc82673f | 426 | int retval; |
242bd2d5 XL |
427 | __u32 outcnt, incnt; |
428 | __u16 out, in; | |
429 | ||
430 | if (!asoc->peer.reconf_capable || | |
431 | !(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) { | |
432 | retval = -ENOPROTOOPT; | |
433 | goto out; | |
434 | } | |
435 | ||
436 | if (asoc->strreset_outstanding) { | |
437 | retval = -EINPROGRESS; | |
438 | goto out; | |
439 | } | |
440 | ||
441 | out = params->sas_outstrms; | |
442 | in = params->sas_instrms; | |
443 | outcnt = stream->outcnt + out; | |
444 | incnt = stream->incnt + in; | |
445 | if (outcnt > SCTP_MAX_STREAM || incnt > SCTP_MAX_STREAM || | |
446 | (!out && !in)) { | |
447 | retval = -EINVAL; | |
448 | goto out; | |
449 | } | |
450 | ||
451 | if (out) { | |
e090abd0 MRL |
452 | retval = sctp_stream_alloc_out(stream, outcnt, GFP_KERNEL); |
453 | if (retval) | |
242bd2d5 | 454 | goto out; |
242bd2d5 XL |
455 | } |
456 | ||
242bd2d5 | 457 | chunk = sctp_make_strreset_addstrm(asoc, out, in); |
dc82673f WY |
458 | if (!chunk) { |
459 | retval = -ENOMEM; | |
242bd2d5 | 460 | goto out; |
dc82673f | 461 | } |
242bd2d5 XL |
462 | |
463 | asoc->strreset_chunk = chunk; | |
464 | sctp_chunk_hold(asoc->strreset_chunk); | |
465 | ||
466 | retval = sctp_send_reconf(asoc, chunk); | |
467 | if (retval) { | |
468 | sctp_chunk_put(asoc->strreset_chunk); | |
469 | asoc->strreset_chunk = NULL; | |
470 | goto out; | |
471 | } | |
472 | ||
242bd2d5 XL |
473 | asoc->strreset_outstanding = !!out + !!in; |
474 | ||
475 | out: | |
476 | return retval; | |
477 | } | |
81054476 | 478 | |
3c918704 | 479 | static struct sctp_paramhdr *sctp_chunk_lookup_strreset_param( |
1da4fc97 | 480 | struct sctp_association *asoc, __be32 resp_seq, |
50a41591 | 481 | __be16 type) |
81054476 XL |
482 | { |
483 | struct sctp_chunk *chunk = asoc->strreset_chunk; | |
484 | struct sctp_reconf_chunk *hdr; | |
485 | union sctp_params param; | |
486 | ||
50a41591 | 487 | if (!chunk) |
81054476 XL |
488 | return NULL; |
489 | ||
490 | hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr; | |
491 | sctp_walk_params(param, hdr, params) { | |
492 | /* sctp_strreset_tsnreq is actually the basic structure | |
493 | * of all stream reconf params, so it's safe to use it | |
494 | * to access request_seq. | |
495 | */ | |
496 | struct sctp_strreset_tsnreq *req = param.v; | |
497 | ||
50a41591 XL |
498 | if ((!resp_seq || req->request_seq == resp_seq) && |
499 | (!type || type == req->param_hdr.type)) | |
81054476 XL |
500 | return param.v; |
501 | } | |
502 | ||
503 | return NULL; | |
504 | } | |
505 | ||
e4dc99c7 XL |
506 | static void sctp_update_strreset_result(struct sctp_association *asoc, |
507 | __u32 result) | |
508 | { | |
509 | asoc->strreset_result[1] = asoc->strreset_result[0]; | |
510 | asoc->strreset_result[0] = result; | |
511 | } | |
512 | ||
81054476 XL |
513 | struct sctp_chunk *sctp_process_strreset_outreq( |
514 | struct sctp_association *asoc, | |
515 | union sctp_params param, | |
516 | struct sctp_ulpevent **evp) | |
517 | { | |
518 | struct sctp_strreset_outreq *outreq = param.v; | |
cee360ab | 519 | struct sctp_stream *stream = &asoc->stream; |
81054476 | 520 | __u32 result = SCTP_STRRESET_DENIED; |
1da4fc97 | 521 | __be16 *str_p = NULL; |
81054476 | 522 | __u32 request_seq; |
2e6dc4d9 | 523 | __u16 i, nums; |
81054476 XL |
524 | |
525 | request_seq = ntohl(outreq->request_seq); | |
526 | ||
527 | if (ntohl(outreq->send_reset_at_tsn) > | |
528 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map)) { | |
529 | result = SCTP_STRRESET_IN_PROGRESS; | |
e4dc99c7 | 530 | goto err; |
81054476 XL |
531 | } |
532 | ||
e4dc99c7 XL |
533 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
534 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
81054476 | 535 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
536 | goto err; |
537 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
538 | i = asoc->strreset_inseq - request_seq - 1; | |
539 | result = asoc->strreset_result[i]; | |
540 | goto err; | |
81054476 | 541 | } |
e4dc99c7 | 542 | asoc->strreset_inseq++; |
81054476 XL |
543 | |
544 | /* Check strreset_enable after inseq inc, as sender cannot tell | |
545 | * the peer doesn't enable strreset after receiving response with | |
546 | * result denied, as well as to keep consistent with bsd. | |
547 | */ | |
548 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
549 | goto out; | |
550 | ||
2e6dc4d9 XL |
551 | nums = (ntohs(param.p->length) - sizeof(*outreq)) / sizeof(__u16); |
552 | str_p = outreq->list_of_streams; | |
553 | for (i = 0; i < nums; i++) { | |
554 | if (ntohs(str_p[i]) >= stream->incnt) { | |
555 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
556 | goto out; | |
557 | } | |
558 | } | |
559 | ||
81054476 | 560 | if (asoc->strreset_chunk) { |
50a41591 XL |
561 | if (!sctp_chunk_lookup_strreset_param( |
562 | asoc, outreq->response_seq, | |
563 | SCTP_PARAM_RESET_IN_REQUEST)) { | |
81054476 XL |
564 | /* same process with outstanding isn't 0 */ |
565 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
566 | goto out; | |
567 | } | |
568 | ||
569 | asoc->strreset_outstanding--; | |
570 | asoc->strreset_outseq++; | |
571 | ||
572 | if (!asoc->strreset_outstanding) { | |
50a41591 XL |
573 | struct sctp_transport *t; |
574 | ||
81054476 XL |
575 | t = asoc->strreset_chunk->transport; |
576 | if (del_timer(&t->reconf_timer)) | |
577 | sctp_transport_put(t); | |
578 | ||
579 | sctp_chunk_put(asoc->strreset_chunk); | |
580 | asoc->strreset_chunk = NULL; | |
581 | } | |
81054476 XL |
582 | } |
583 | ||
2e6dc4d9 | 584 | if (nums) |
81054476 | 585 | for (i = 0; i < nums; i++) |
05364ca0 | 586 | SCTP_SI(stream, ntohs(str_p[i]))->mid = 0; |
2e6dc4d9 | 587 | else |
81054476 | 588 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 589 | SCTP_SI(stream, i)->mid = 0; |
81054476 XL |
590 | |
591 | result = SCTP_STRRESET_PERFORMED; | |
592 | ||
593 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, | |
2e6dc4d9 | 594 | SCTP_STREAM_RESET_INCOMING_SSN, nums, str_p, GFP_ATOMIC); |
81054476 XL |
595 | |
596 | out: | |
e4dc99c7 XL |
597 | sctp_update_strreset_result(asoc, result); |
598 | err: | |
81054476 XL |
599 | return sctp_make_strreset_resp(asoc, result, request_seq); |
600 | } | |
16e1a919 XL |
601 | |
602 | struct sctp_chunk *sctp_process_strreset_inreq( | |
603 | struct sctp_association *asoc, | |
604 | union sctp_params param, | |
605 | struct sctp_ulpevent **evp) | |
606 | { | |
607 | struct sctp_strreset_inreq *inreq = param.v; | |
cee360ab | 608 | struct sctp_stream *stream = &asoc->stream; |
16e1a919 XL |
609 | __u32 result = SCTP_STRRESET_DENIED; |
610 | struct sctp_chunk *chunk = NULL; | |
16e1a919 | 611 | __u32 request_seq; |
1da4fc97 XL |
612 | __u16 i, nums; |
613 | __be16 *str_p; | |
16e1a919 XL |
614 | |
615 | request_seq = ntohl(inreq->request_seq); | |
d0f025e6 XL |
616 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
617 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
16e1a919 | 618 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
619 | goto err; |
620 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
621 | i = asoc->strreset_inseq - request_seq - 1; | |
622 | result = asoc->strreset_result[i]; | |
623 | if (result == SCTP_STRRESET_PERFORMED) | |
624 | return NULL; | |
625 | goto err; | |
16e1a919 | 626 | } |
d0f025e6 | 627 | asoc->strreset_inseq++; |
16e1a919 XL |
628 | |
629 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
630 | goto out; | |
631 | ||
632 | if (asoc->strreset_outstanding) { | |
633 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
634 | goto out; | |
635 | } | |
636 | ||
3aa623da | 637 | nums = (ntohs(param.p->length) - sizeof(*inreq)) / sizeof(__u16); |
16e1a919 XL |
638 | str_p = inreq->list_of_streams; |
639 | for (i = 0; i < nums; i++) { | |
640 | if (ntohs(str_p[i]) >= stream->outcnt) { | |
641 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
642 | goto out; | |
643 | } | |
644 | } | |
645 | ||
d570a59c XL |
646 | if (!sctp_stream_outq_is_empty(stream, nums, str_p)) { |
647 | result = SCTP_STRRESET_IN_PROGRESS; | |
648 | asoc->strreset_inseq--; | |
649 | goto err; | |
650 | } | |
651 | ||
16e1a919 XL |
652 | chunk = sctp_make_strreset_req(asoc, nums, str_p, 1, 0); |
653 | if (!chunk) | |
654 | goto out; | |
655 | ||
656 | if (nums) | |
657 | for (i = 0; i < nums; i++) | |
05364ca0 | 658 | SCTP_SO(stream, ntohs(str_p[i]))->state = |
16e1a919 XL |
659 | SCTP_STREAM_CLOSED; |
660 | else | |
661 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 662 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
16e1a919 XL |
663 | |
664 | asoc->strreset_chunk = chunk; | |
665 | asoc->strreset_outstanding = 1; | |
666 | sctp_chunk_hold(asoc->strreset_chunk); | |
667 | ||
d0f025e6 XL |
668 | result = SCTP_STRRESET_PERFORMED; |
669 | ||
16e1a919 | 670 | out: |
d0f025e6 XL |
671 | sctp_update_strreset_result(asoc, result); |
672 | err: | |
16e1a919 XL |
673 | if (!chunk) |
674 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
675 | ||
676 | return chunk; | |
677 | } | |
692787ce XL |
678 | |
679 | struct sctp_chunk *sctp_process_strreset_tsnreq( | |
680 | struct sctp_association *asoc, | |
681 | union sctp_params param, | |
682 | struct sctp_ulpevent **evp) | |
683 | { | |
684 | __u32 init_tsn = 0, next_tsn = 0, max_tsn_seen; | |
685 | struct sctp_strreset_tsnreq *tsnreq = param.v; | |
cee360ab | 686 | struct sctp_stream *stream = &asoc->stream; |
692787ce XL |
687 | __u32 result = SCTP_STRRESET_DENIED; |
688 | __u32 request_seq; | |
689 | __u16 i; | |
690 | ||
691 | request_seq = ntohl(tsnreq->request_seq); | |
6c801387 XL |
692 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
693 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
692787ce | 694 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
6c801387 XL |
695 | goto err; |
696 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
697 | i = asoc->strreset_inseq - request_seq - 1; | |
698 | result = asoc->strreset_result[i]; | |
699 | if (result == SCTP_STRRESET_PERFORMED) { | |
52a39589 | 700 | next_tsn = asoc->ctsn_ack_point + 1; |
6c801387 XL |
701 | init_tsn = |
702 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + 1; | |
703 | } | |
704 | goto err; | |
692787ce | 705 | } |
5c6144a0 XL |
706 | |
707 | if (!sctp_outq_is_empty(&asoc->outqueue)) { | |
708 | result = SCTP_STRRESET_IN_PROGRESS; | |
709 | goto err; | |
710 | } | |
711 | ||
6c801387 | 712 | asoc->strreset_inseq++; |
692787ce XL |
713 | |
714 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
715 | goto out; | |
716 | ||
717 | if (asoc->strreset_outstanding) { | |
718 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
719 | goto out; | |
720 | } | |
721 | ||
159f2a74 XL |
722 | /* G4: The same processing as though a FWD-TSN chunk (as defined in |
723 | * [RFC3758]) with all streams affected and a new cumulative TSN | |
724 | * ACK of the Receiver's Next TSN minus 1 were received MUST be | |
725 | * performed. | |
692787ce XL |
726 | */ |
727 | max_tsn_seen = sctp_tsnmap_get_max_tsn_seen(&asoc->peer.tsn_map); | |
47b20a88 | 728 | asoc->stream.si->report_ftsn(&asoc->ulpq, max_tsn_seen); |
692787ce XL |
729 | |
730 | /* G1: Compute an appropriate value for the Receiver's Next TSN -- the | |
731 | * TSN that the peer should use to send the next DATA chunk. The | |
732 | * value SHOULD be the smallest TSN not acknowledged by the | |
733 | * receiver of the request plus 2^31. | |
734 | */ | |
735 | init_tsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + (1 << 31); | |
736 | sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_INITIAL, | |
737 | init_tsn, GFP_ATOMIC); | |
738 | ||
159f2a74 XL |
739 | /* G3: The same processing as though a SACK chunk with no gap report |
740 | * and a cumulative TSN ACK of the Sender's Next TSN minus 1 were | |
741 | * received MUST be performed. | |
692787ce XL |
742 | */ |
743 | sctp_outq_free(&asoc->outqueue); | |
744 | ||
745 | /* G2: Compute an appropriate value for the local endpoint's next TSN, | |
746 | * i.e., the next TSN assigned by the receiver of the SSN/TSN reset | |
747 | * chunk. The value SHOULD be the highest TSN sent by the receiver | |
748 | * of the request plus 1. | |
749 | */ | |
750 | next_tsn = asoc->next_tsn; | |
751 | asoc->ctsn_ack_point = next_tsn - 1; | |
752 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
753 | ||
754 | /* G5: The next expected and outgoing SSNs MUST be reset to 0 for all | |
755 | * incoming and outgoing streams. | |
756 | */ | |
107e2425 | 757 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
758 | SCTP_SO(stream, i)->mid = 0; |
759 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 760 | } |
692787ce | 761 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 762 | SCTP_SI(stream, i)->mid = 0; |
692787ce XL |
763 | |
764 | result = SCTP_STRRESET_PERFORMED; | |
765 | ||
766 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, 0, init_tsn, | |
767 | next_tsn, GFP_ATOMIC); | |
768 | ||
769 | out: | |
6c801387 XL |
770 | sctp_update_strreset_result(asoc, result); |
771 | err: | |
692787ce XL |
772 | return sctp_make_strreset_tsnresp(asoc, result, request_seq, |
773 | next_tsn, init_tsn); | |
774 | } | |
50a41591 XL |
775 | |
776 | struct sctp_chunk *sctp_process_strreset_addstrm_out( | |
777 | struct sctp_association *asoc, | |
778 | union sctp_params param, | |
779 | struct sctp_ulpevent **evp) | |
780 | { | |
781 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 782 | struct sctp_stream *stream = &asoc->stream; |
50a41591 | 783 | __u32 result = SCTP_STRRESET_DENIED; |
50a41591 | 784 | __u32 request_seq, incnt; |
e4dc99c7 | 785 | __u16 in, i; |
50a41591 XL |
786 | |
787 | request_seq = ntohl(addstrm->request_seq); | |
e4dc99c7 XL |
788 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
789 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
50a41591 | 790 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
791 | goto err; |
792 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
793 | i = asoc->strreset_inseq - request_seq - 1; | |
794 | result = asoc->strreset_result[i]; | |
795 | goto err; | |
50a41591 | 796 | } |
e4dc99c7 | 797 | asoc->strreset_inseq++; |
50a41591 XL |
798 | |
799 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
800 | goto out; | |
801 | ||
8220c870 XL |
802 | in = ntohs(addstrm->number_of_streams); |
803 | incnt = stream->incnt + in; | |
804 | if (!in || incnt > SCTP_MAX_STREAM) | |
805 | goto out; | |
806 | ||
807 | if (sctp_stream_alloc_in(stream, incnt, GFP_ATOMIC)) | |
808 | goto out; | |
809 | ||
50a41591 XL |
810 | if (asoc->strreset_chunk) { |
811 | if (!sctp_chunk_lookup_strreset_param( | |
812 | asoc, 0, SCTP_PARAM_RESET_ADD_IN_STREAMS)) { | |
813 | /* same process with outstanding isn't 0 */ | |
814 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
815 | goto out; | |
816 | } | |
817 | ||
818 | asoc->strreset_outstanding--; | |
819 | asoc->strreset_outseq++; | |
820 | ||
821 | if (!asoc->strreset_outstanding) { | |
822 | struct sctp_transport *t; | |
823 | ||
824 | t = asoc->strreset_chunk->transport; | |
825 | if (del_timer(&t->reconf_timer)) | |
826 | sctp_transport_put(t); | |
827 | ||
828 | sctp_chunk_put(asoc->strreset_chunk); | |
829 | asoc->strreset_chunk = NULL; | |
830 | } | |
831 | } | |
832 | ||
50a41591 XL |
833 | stream->incnt = incnt; |
834 | ||
835 | result = SCTP_STRRESET_PERFORMED; | |
836 | ||
837 | *evp = sctp_ulpevent_make_stream_change_event(asoc, | |
838 | 0, ntohs(addstrm->number_of_streams), 0, GFP_ATOMIC); | |
839 | ||
840 | out: | |
e4dc99c7 XL |
841 | sctp_update_strreset_result(asoc, result); |
842 | err: | |
50a41591 XL |
843 | return sctp_make_strreset_resp(asoc, result, request_seq); |
844 | } | |
c5c4ebb3 XL |
845 | |
846 | struct sctp_chunk *sctp_process_strreset_addstrm_in( | |
847 | struct sctp_association *asoc, | |
848 | union sctp_params param, | |
849 | struct sctp_ulpevent **evp) | |
850 | { | |
851 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 852 | struct sctp_stream *stream = &asoc->stream; |
c5c4ebb3 | 853 | __u32 result = SCTP_STRRESET_DENIED; |
c5c4ebb3 XL |
854 | struct sctp_chunk *chunk = NULL; |
855 | __u32 request_seq, outcnt; | |
d0f025e6 | 856 | __u16 out, i; |
e090abd0 | 857 | int ret; |
c5c4ebb3 XL |
858 | |
859 | request_seq = ntohl(addstrm->request_seq); | |
d0f025e6 XL |
860 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
861 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
c5c4ebb3 | 862 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
863 | goto err; |
864 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
865 | i = asoc->strreset_inseq - request_seq - 1; | |
866 | result = asoc->strreset_result[i]; | |
867 | if (result == SCTP_STRRESET_PERFORMED) | |
868 | return NULL; | |
869 | goto err; | |
c5c4ebb3 | 870 | } |
d0f025e6 | 871 | asoc->strreset_inseq++; |
c5c4ebb3 XL |
872 | |
873 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
874 | goto out; | |
875 | ||
876 | if (asoc->strreset_outstanding) { | |
877 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
878 | goto out; | |
879 | } | |
880 | ||
881 | out = ntohs(addstrm->number_of_streams); | |
882 | outcnt = stream->outcnt + out; | |
883 | if (!out || outcnt > SCTP_MAX_STREAM) | |
884 | goto out; | |
885 | ||
e090abd0 MRL |
886 | ret = sctp_stream_alloc_out(stream, outcnt, GFP_ATOMIC); |
887 | if (ret) | |
c5c4ebb3 XL |
888 | goto out; |
889 | ||
c5c4ebb3 XL |
890 | chunk = sctp_make_strreset_addstrm(asoc, out, 0); |
891 | if (!chunk) | |
892 | goto out; | |
893 | ||
894 | asoc->strreset_chunk = chunk; | |
895 | asoc->strreset_outstanding = 1; | |
896 | sctp_chunk_hold(asoc->strreset_chunk); | |
897 | ||
898 | stream->outcnt = outcnt; | |
899 | ||
d0f025e6 XL |
900 | result = SCTP_STRRESET_PERFORMED; |
901 | ||
c5c4ebb3 | 902 | out: |
d0f025e6 XL |
903 | sctp_update_strreset_result(asoc, result); |
904 | err: | |
c5c4ebb3 XL |
905 | if (!chunk) |
906 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
907 | ||
908 | return chunk; | |
909 | } | |
11ae76e6 XL |
910 | |
911 | struct sctp_chunk *sctp_process_strreset_resp( | |
912 | struct sctp_association *asoc, | |
913 | union sctp_params param, | |
914 | struct sctp_ulpevent **evp) | |
915 | { | |
cee360ab | 916 | struct sctp_stream *stream = &asoc->stream; |
11ae76e6 | 917 | struct sctp_strreset_resp *resp = param.v; |
11ae76e6 XL |
918 | struct sctp_transport *t; |
919 | __u16 i, nums, flags = 0; | |
3c918704 | 920 | struct sctp_paramhdr *req; |
11ae76e6 XL |
921 | __u32 result; |
922 | ||
923 | req = sctp_chunk_lookup_strreset_param(asoc, resp->response_seq, 0); | |
924 | if (!req) | |
925 | return NULL; | |
926 | ||
927 | result = ntohl(resp->result); | |
928 | if (result != SCTP_STRRESET_PERFORMED) { | |
929 | /* if in progress, do nothing but retransmit */ | |
930 | if (result == SCTP_STRRESET_IN_PROGRESS) | |
931 | return NULL; | |
932 | else if (result == SCTP_STRRESET_DENIED) | |
933 | flags = SCTP_STREAM_RESET_DENIED; | |
934 | else | |
935 | flags = SCTP_STREAM_RESET_FAILED; | |
936 | } | |
937 | ||
938 | if (req->type == SCTP_PARAM_RESET_OUT_REQUEST) { | |
939 | struct sctp_strreset_outreq *outreq; | |
1da4fc97 | 940 | __be16 *str_p; |
11ae76e6 XL |
941 | |
942 | outreq = (struct sctp_strreset_outreq *)req; | |
edb12f2d | 943 | str_p = outreq->list_of_streams; |
3aa623da XL |
944 | nums = (ntohs(outreq->param_hdr.length) - sizeof(*outreq)) / |
945 | sizeof(__u16); | |
11ae76e6 XL |
946 | |
947 | if (result == SCTP_STRRESET_PERFORMED) { | |
05364ca0 | 948 | struct sctp_stream_out *sout; |
11ae76e6 | 949 | if (nums) { |
107e2425 | 950 | for (i = 0; i < nums; i++) { |
05364ca0 KK |
951 | sout = SCTP_SO(stream, ntohs(str_p[i])); |
952 | sout->mid = 0; | |
953 | sout->mid_uo = 0; | |
107e2425 | 954 | } |
11ae76e6 | 955 | } else { |
107e2425 | 956 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
957 | sout = SCTP_SO(stream, i); |
958 | sout->mid = 0; | |
959 | sout->mid_uo = 0; | |
107e2425 | 960 | } |
11ae76e6 | 961 | } |
11ae76e6 XL |
962 | } |
963 | ||
2e6dc4d9 XL |
964 | flags |= SCTP_STREAM_RESET_OUTGOING_SSN; |
965 | ||
11ae76e6 | 966 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 967 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
11ae76e6 XL |
968 | |
969 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, | |
970 | nums, str_p, GFP_ATOMIC); | |
971 | } else if (req->type == SCTP_PARAM_RESET_IN_REQUEST) { | |
972 | struct sctp_strreset_inreq *inreq; | |
1da4fc97 | 973 | __be16 *str_p; |
11ae76e6 XL |
974 | |
975 | /* if the result is performed, it's impossible for inreq */ | |
976 | if (result == SCTP_STRRESET_PERFORMED) | |
977 | return NULL; | |
978 | ||
979 | inreq = (struct sctp_strreset_inreq *)req; | |
edb12f2d | 980 | str_p = inreq->list_of_streams; |
3aa623da XL |
981 | nums = (ntohs(inreq->param_hdr.length) - sizeof(*inreq)) / |
982 | sizeof(__u16); | |
11ae76e6 | 983 | |
2e6dc4d9 XL |
984 | flags |= SCTP_STREAM_RESET_INCOMING_SSN; |
985 | ||
11ae76e6 XL |
986 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, |
987 | nums, str_p, GFP_ATOMIC); | |
988 | } else if (req->type == SCTP_PARAM_RESET_TSN_REQUEST) { | |
989 | struct sctp_strreset_resptsn *resptsn; | |
990 | __u32 stsn, rtsn; | |
991 | ||
992 | /* check for resptsn, as sctp_verify_reconf didn't do it*/ | |
993 | if (ntohs(param.p->length) != sizeof(*resptsn)) | |
994 | return NULL; | |
995 | ||
996 | resptsn = (struct sctp_strreset_resptsn *)resp; | |
997 | stsn = ntohl(resptsn->senders_next_tsn); | |
998 | rtsn = ntohl(resptsn->receivers_next_tsn); | |
999 | ||
1000 | if (result == SCTP_STRRESET_PERFORMED) { | |
1001 | __u32 mtsn = sctp_tsnmap_get_max_tsn_seen( | |
1002 | &asoc->peer.tsn_map); | |
159f2a74 | 1003 | LIST_HEAD(temp); |
11ae76e6 | 1004 | |
47b20a88 | 1005 | asoc->stream.si->report_ftsn(&asoc->ulpq, mtsn); |
11ae76e6 XL |
1006 | |
1007 | sctp_tsnmap_init(&asoc->peer.tsn_map, | |
1008 | SCTP_TSN_MAP_INITIAL, | |
1009 | stsn, GFP_ATOMIC); | |
1010 | ||
159f2a74 XL |
1011 | /* Clean up sacked and abandoned queues only. As the |
1012 | * out_chunk_list may not be empty, splice it to temp, | |
1013 | * then get it back after sctp_outq_free is done. | |
1014 | */ | |
1015 | list_splice_init(&asoc->outqueue.out_chunk_list, &temp); | |
11ae76e6 | 1016 | sctp_outq_free(&asoc->outqueue); |
159f2a74 | 1017 | list_splice_init(&temp, &asoc->outqueue.out_chunk_list); |
11ae76e6 XL |
1018 | |
1019 | asoc->next_tsn = rtsn; | |
1020 | asoc->ctsn_ack_point = asoc->next_tsn - 1; | |
1021 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
1022 | ||
107e2425 | 1023 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
1024 | SCTP_SO(stream, i)->mid = 0; |
1025 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 1026 | } |
11ae76e6 | 1027 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 1028 | SCTP_SI(stream, i)->mid = 0; |
11ae76e6 XL |
1029 | } |
1030 | ||
1031 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 1032 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
11ae76e6 XL |
1033 | |
1034 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, flags, | |
1035 | stsn, rtsn, GFP_ATOMIC); | |
1036 | } else if (req->type == SCTP_PARAM_RESET_ADD_OUT_STREAMS) { | |
1037 | struct sctp_strreset_addstrm *addstrm; | |
1038 | __u16 number; | |
1039 | ||
1040 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1041 | nums = ntohs(addstrm->number_of_streams); | |
1042 | number = stream->outcnt - nums; | |
1043 | ||
1044 | if (result == SCTP_STRRESET_PERFORMED) | |
1045 | for (i = number; i < stream->outcnt; i++) | |
05364ca0 | 1046 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
11ae76e6 XL |
1047 | else |
1048 | stream->outcnt = number; | |
1049 | ||
1050 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1051 | 0, nums, GFP_ATOMIC); | |
1052 | } else if (req->type == SCTP_PARAM_RESET_ADD_IN_STREAMS) { | |
1053 | struct sctp_strreset_addstrm *addstrm; | |
1054 | ||
1055 | /* if the result is performed, it's impossible for addstrm in | |
1056 | * request. | |
1057 | */ | |
1058 | if (result == SCTP_STRRESET_PERFORMED) | |
1059 | return NULL; | |
1060 | ||
1061 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1062 | nums = ntohs(addstrm->number_of_streams); | |
1063 | ||
1064 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1065 | nums, 0, GFP_ATOMIC); | |
1066 | } | |
1067 | ||
1068 | asoc->strreset_outstanding--; | |
1069 | asoc->strreset_outseq++; | |
1070 | ||
1071 | /* remove everything for this reconf request */ | |
1072 | if (!asoc->strreset_outstanding) { | |
1073 | t = asoc->strreset_chunk->transport; | |
1074 | if (del_timer(&t->reconf_timer)) | |
1075 | sctp_transport_put(t); | |
1076 | ||
1077 | sctp_chunk_put(asoc->strreset_chunk); | |
1078 | asoc->strreset_chunk = NULL; | |
1079 | } | |
1080 | ||
1081 | return NULL; | |
1082 | } |