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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 | ||
0d493b4d KK |
40 | static struct flex_array *fa_alloc(size_t elem_size, size_t elem_count, |
41 | gfp_t gfp) | |
42 | { | |
43 | struct flex_array *result; | |
44 | int err; | |
45 | ||
46 | result = flex_array_alloc(elem_size, elem_count, gfp); | |
47 | if (result) { | |
48 | err = flex_array_prealloc(result, 0, elem_count, gfp); | |
49 | if (err) { | |
50 | flex_array_free(result); | |
51 | result = NULL; | |
52 | } | |
53 | } | |
54 | ||
55 | return result; | |
56 | } | |
57 | ||
58 | static void fa_free(struct flex_array *fa) | |
59 | { | |
60 | if (fa) | |
61 | flex_array_free(fa); | |
62 | } | |
63 | ||
64 | static void fa_copy(struct flex_array *fa, struct flex_array *from, | |
65 | size_t index, size_t count) | |
66 | { | |
67 | void *elem; | |
68 | ||
69 | while (count--) { | |
70 | elem = flex_array_get(from, index); | |
71 | flex_array_put(fa, index, elem, 0); | |
72 | index++; | |
73 | } | |
74 | } | |
75 | ||
76 | static void fa_zero(struct flex_array *fa, size_t index, size_t count) | |
77 | { | |
78 | void *elem; | |
79 | ||
80 | while (count--) { | |
81 | elem = flex_array_get(fa, index); | |
82 | memset(elem, 0, fa->element_size); | |
83 | index++; | |
84 | } | |
85 | } | |
86 | ||
cfe4bd7a XL |
87 | static size_t fa_index(struct flex_array *fa, void *elem, size_t count) |
88 | { | |
89 | size_t index = 0; | |
90 | ||
91 | while (count--) { | |
92 | if (elem == flex_array_get(fa, index)) | |
93 | break; | |
94 | index++; | |
95 | } | |
96 | ||
97 | return index; | |
98 | } | |
99 | ||
5bbbbe32 MRL |
100 | /* Migrates chunks from stream queues to new stream queues if needed, |
101 | * but not across associations. Also, removes those chunks to streams | |
102 | * higher than the new max. | |
103 | */ | |
104 | static void sctp_stream_outq_migrate(struct sctp_stream *stream, | |
105 | struct sctp_stream *new, __u16 outcnt) | |
106 | { | |
107 | struct sctp_association *asoc; | |
108 | struct sctp_chunk *ch, *temp; | |
109 | struct sctp_outq *outq; | |
110 | int i; | |
111 | ||
112 | asoc = container_of(stream, struct sctp_association, stream); | |
113 | outq = &asoc->outqueue; | |
114 | ||
115 | list_for_each_entry_safe(ch, temp, &outq->out_chunk_list, list) { | |
116 | __u16 sid = sctp_chunk_stream_no(ch); | |
117 | ||
118 | if (sid < outcnt) | |
119 | continue; | |
120 | ||
121 | sctp_sched_dequeue_common(outq, ch); | |
122 | /* No need to call dequeue_done here because | |
123 | * the chunks are not scheduled by now. | |
124 | */ | |
125 | ||
126 | /* Mark as failed send. */ | |
08f46070 | 127 | sctp_chunk_fail(ch, (__force __u32)SCTP_ERROR_INV_STRM); |
5bbbbe32 MRL |
128 | if (asoc->peer.prsctp_capable && |
129 | SCTP_PR_PRIO_ENABLED(ch->sinfo.sinfo_flags)) | |
130 | asoc->sent_cnt_removable--; | |
131 | ||
132 | sctp_chunk_free(ch); | |
133 | } | |
134 | ||
135 | if (new) { | |
136 | /* Here we actually move the old ext stuff into the new | |
137 | * buffer, because we want to keep it. Then | |
138 | * sctp_stream_update will swap ->out pointers. | |
139 | */ | |
140 | for (i = 0; i < outcnt; i++) { | |
0d493b4d KK |
141 | kfree(SCTP_SO(new, i)->ext); |
142 | SCTP_SO(new, i)->ext = SCTP_SO(stream, i)->ext; | |
143 | SCTP_SO(stream, i)->ext = NULL; | |
5bbbbe32 MRL |
144 | } |
145 | } | |
146 | ||
af98c5a7 | 147 | for (i = outcnt; i < stream->outcnt; i++) { |
0d493b4d | 148 | kfree(SCTP_SO(stream, i)->ext); |
af98c5a7 XL |
149 | SCTP_SO(stream, i)->ext = NULL; |
150 | } | |
5bbbbe32 | 151 | } |
a8386317 | 152 | |
e090abd0 MRL |
153 | static int sctp_stream_alloc_out(struct sctp_stream *stream, __u16 outcnt, |
154 | gfp_t gfp) | |
155 | { | |
0d493b4d KK |
156 | struct flex_array *out; |
157 | size_t elem_size = sizeof(struct sctp_stream_out); | |
e090abd0 | 158 | |
0d493b4d | 159 | out = fa_alloc(elem_size, outcnt, gfp); |
e090abd0 MRL |
160 | if (!out) |
161 | return -ENOMEM; | |
162 | ||
163 | if (stream->out) { | |
0d493b4d | 164 | fa_copy(out, stream->out, 0, min(outcnt, stream->outcnt)); |
cfe4bd7a XL |
165 | if (stream->out_curr) { |
166 | size_t index = fa_index(stream->out, stream->out_curr, | |
167 | stream->outcnt); | |
168 | ||
169 | BUG_ON(index == stream->outcnt); | |
170 | stream->out_curr = flex_array_get(out, index); | |
171 | } | |
0d493b4d | 172 | fa_free(stream->out); |
e090abd0 MRL |
173 | } |
174 | ||
175 | if (outcnt > stream->outcnt) | |
0d493b4d | 176 | fa_zero(out, stream->outcnt, (outcnt - stream->outcnt)); |
e090abd0 MRL |
177 | |
178 | stream->out = out; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
1fdb8d8f MRL |
183 | static int sctp_stream_alloc_in(struct sctp_stream *stream, __u16 incnt, |
184 | gfp_t gfp) | |
185 | { | |
0d493b4d KK |
186 | struct flex_array *in; |
187 | size_t elem_size = sizeof(struct sctp_stream_in); | |
1fdb8d8f | 188 | |
0d493b4d | 189 | in = fa_alloc(elem_size, incnt, gfp); |
1fdb8d8f MRL |
190 | if (!in) |
191 | return -ENOMEM; | |
192 | ||
193 | if (stream->in) { | |
0d493b4d KK |
194 | fa_copy(in, stream->in, 0, min(incnt, stream->incnt)); |
195 | fa_free(stream->in); | |
1fdb8d8f MRL |
196 | } |
197 | ||
198 | if (incnt > stream->incnt) | |
0d493b4d | 199 | fa_zero(in, stream->incnt, (incnt - stream->incnt)); |
1fdb8d8f MRL |
200 | |
201 | stream->in = in; | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
ff356414 XL |
206 | int sctp_stream_init(struct sctp_stream *stream, __u16 outcnt, __u16 incnt, |
207 | gfp_t gfp) | |
a8386317 | 208 | { |
5bbbbe32 MRL |
209 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
210 | int i, ret = 0; | |
3dbcc105 | 211 | |
1ae2eaaa MRL |
212 | gfp |= __GFP_NOWARN; |
213 | ||
3dbcc105 | 214 | /* Initial stream->out size may be very big, so free it and alloc |
1ae2eaaa | 215 | * a new one with new outcnt to save memory if needed. |
3dbcc105 | 216 | */ |
1ae2eaaa MRL |
217 | if (outcnt == stream->outcnt) |
218 | goto in; | |
219 | ||
5bbbbe32 MRL |
220 | /* Filter out chunks queued on streams that won't exist anymore */ |
221 | sched->unsched_all(stream); | |
222 | sctp_stream_outq_migrate(stream, NULL, outcnt); | |
223 | sched->sched_all(stream); | |
224 | ||
79d08951 MRL |
225 | ret = sctp_stream_alloc_out(stream, outcnt, gfp); |
226 | if (ret) | |
227 | goto out; | |
3dbcc105 | 228 | |
ff356414 | 229 | stream->outcnt = outcnt; |
3dbcc105 | 230 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 231 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
3dbcc105 | 232 | |
5bbbbe32 MRL |
233 | sched->init(stream); |
234 | ||
1ae2eaaa | 235 | in: |
0c3f6f65 | 236 | sctp_stream_interleave_init(stream); |
ff356414 | 237 | if (!incnt) |
5bbbbe32 | 238 | goto out; |
ff356414 | 239 | |
79d08951 MRL |
240 | ret = sctp_stream_alloc_in(stream, incnt, gfp); |
241 | if (ret) { | |
242 | sched->free(stream); | |
0d493b4d | 243 | fa_free(stream->out); |
79d08951 MRL |
244 | stream->out = NULL; |
245 | stream->outcnt = 0; | |
246 | goto out; | |
a8386317 XL |
247 | } |
248 | ||
ff356414 XL |
249 | stream->incnt = incnt; |
250 | ||
5bbbbe32 MRL |
251 | out: |
252 | return ret; | |
a8386317 XL |
253 | } |
254 | ||
f952be79 MRL |
255 | int sctp_stream_init_ext(struct sctp_stream *stream, __u16 sid) |
256 | { | |
257 | struct sctp_stream_out_ext *soute; | |
258 | ||
259 | soute = kzalloc(sizeof(*soute), GFP_KERNEL); | |
260 | if (!soute) | |
261 | return -ENOMEM; | |
05364ca0 | 262 | SCTP_SO(stream, sid)->ext = soute; |
f952be79 | 263 | |
5bbbbe32 | 264 | return sctp_sched_init_sid(stream, sid, GFP_KERNEL); |
f952be79 MRL |
265 | } |
266 | ||
a8386317 XL |
267 | void sctp_stream_free(struct sctp_stream *stream) |
268 | { | |
5bbbbe32 | 269 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
f952be79 MRL |
270 | int i; |
271 | ||
5bbbbe32 | 272 | sched->free(stream); |
f952be79 | 273 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 274 | kfree(SCTP_SO(stream, i)->ext); |
0d493b4d KK |
275 | fa_free(stream->out); |
276 | fa_free(stream->in); | |
a8386317 XL |
277 | } |
278 | ||
279 | void sctp_stream_clear(struct sctp_stream *stream) | |
280 | { | |
281 | int i; | |
282 | ||
107e2425 | 283 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
284 | SCTP_SO(stream, i)->mid = 0; |
285 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 286 | } |
a8386317 XL |
287 | |
288 | for (i = 0; i < stream->incnt; i++) | |
05364ca0 | 289 | SCTP_SI(stream, i)->mid = 0; |
a8386317 | 290 | } |
7f9d68ac | 291 | |
cee360ab XL |
292 | void sctp_stream_update(struct sctp_stream *stream, struct sctp_stream *new) |
293 | { | |
5bbbbe32 MRL |
294 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
295 | ||
296 | sched->unsched_all(stream); | |
297 | sctp_stream_outq_migrate(stream, new, new->outcnt); | |
cee360ab XL |
298 | sctp_stream_free(stream); |
299 | ||
300 | stream->out = new->out; | |
301 | stream->in = new->in; | |
302 | stream->outcnt = new->outcnt; | |
303 | stream->incnt = new->incnt; | |
304 | ||
5bbbbe32 MRL |
305 | sched->sched_all(stream); |
306 | ||
cee360ab XL |
307 | new->out = NULL; |
308 | new->in = NULL; | |
6a9a27d5 XL |
309 | new->outcnt = 0; |
310 | new->incnt = 0; | |
cee360ab XL |
311 | } |
312 | ||
7f9d68ac XL |
313 | static int sctp_send_reconf(struct sctp_association *asoc, |
314 | struct sctp_chunk *chunk) | |
315 | { | |
316 | struct net *net = sock_net(asoc->base.sk); | |
317 | int retval = 0; | |
318 | ||
319 | retval = sctp_primitive_RECONF(net, asoc, chunk); | |
320 | if (retval) | |
321 | sctp_chunk_free(chunk); | |
322 | ||
323 | return retval; | |
324 | } | |
325 | ||
d570a59c XL |
326 | static bool sctp_stream_outq_is_empty(struct sctp_stream *stream, |
327 | __u16 str_nums, __be16 *str_list) | |
328 | { | |
329 | struct sctp_association *asoc; | |
330 | __u16 i; | |
331 | ||
332 | asoc = container_of(stream, struct sctp_association, stream); | |
333 | if (!asoc->outqueue.out_qlen) | |
334 | return true; | |
335 | ||
336 | if (!str_nums) | |
337 | return false; | |
338 | ||
339 | for (i = 0; i < str_nums; i++) { | |
340 | __u16 sid = ntohs(str_list[i]); | |
341 | ||
05364ca0 KK |
342 | if (SCTP_SO(stream, sid)->ext && |
343 | !list_empty(&SCTP_SO(stream, sid)->ext->outq)) | |
d570a59c XL |
344 | return false; |
345 | } | |
346 | ||
347 | return true; | |
348 | } | |
349 | ||
7f9d68ac XL |
350 | int sctp_send_reset_streams(struct sctp_association *asoc, |
351 | struct sctp_reset_streams *params) | |
352 | { | |
cee360ab | 353 | struct sctp_stream *stream = &asoc->stream; |
7f9d68ac XL |
354 | __u16 i, str_nums, *str_list; |
355 | struct sctp_chunk *chunk; | |
356 | int retval = -EINVAL; | |
1da4fc97 | 357 | __be16 *nstr_list; |
7f9d68ac XL |
358 | bool out, in; |
359 | ||
360 | if (!asoc->peer.reconf_capable || | |
361 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) { | |
362 | retval = -ENOPROTOOPT; | |
363 | goto out; | |
364 | } | |
365 | ||
366 | if (asoc->strreset_outstanding) { | |
367 | retval = -EINPROGRESS; | |
368 | goto out; | |
369 | } | |
370 | ||
371 | out = params->srs_flags & SCTP_STREAM_RESET_OUTGOING; | |
372 | in = params->srs_flags & SCTP_STREAM_RESET_INCOMING; | |
373 | if (!out && !in) | |
374 | goto out; | |
375 | ||
376 | str_nums = params->srs_number_streams; | |
377 | str_list = params->srs_stream_list; | |
423852f8 XL |
378 | if (str_nums) { |
379 | int param_len = 0; | |
380 | ||
381 | if (out) { | |
382 | for (i = 0; i < str_nums; i++) | |
383 | if (str_list[i] >= stream->outcnt) | |
384 | goto out; | |
385 | ||
386 | param_len = str_nums * sizeof(__u16) + | |
387 | sizeof(struct sctp_strreset_outreq); | |
388 | } | |
389 | ||
390 | if (in) { | |
391 | for (i = 0; i < str_nums; i++) | |
392 | if (str_list[i] >= stream->incnt) | |
393 | goto out; | |
394 | ||
395 | param_len += str_nums * sizeof(__u16) + | |
396 | sizeof(struct sctp_strreset_inreq); | |
397 | } | |
398 | ||
399 | if (param_len > SCTP_MAX_CHUNK_LEN - | |
400 | sizeof(struct sctp_reconf_chunk)) | |
401 | goto out; | |
402 | } | |
7f9d68ac | 403 | |
1da4fc97 XL |
404 | nstr_list = kcalloc(str_nums, sizeof(__be16), GFP_KERNEL); |
405 | if (!nstr_list) { | |
406 | retval = -ENOMEM; | |
407 | goto out; | |
408 | } | |
409 | ||
16e1a919 | 410 | for (i = 0; i < str_nums; i++) |
1da4fc97 | 411 | nstr_list[i] = htons(str_list[i]); |
16e1a919 | 412 | |
d570a59c XL |
413 | if (out && !sctp_stream_outq_is_empty(stream, str_nums, nstr_list)) { |
414 | retval = -EAGAIN; | |
415 | goto out; | |
416 | } | |
417 | ||
1da4fc97 | 418 | chunk = sctp_make_strreset_req(asoc, str_nums, nstr_list, out, in); |
16e1a919 | 419 | |
1da4fc97 | 420 | kfree(nstr_list); |
16e1a919 | 421 | |
119aecba XL |
422 | if (!chunk) { |
423 | retval = -ENOMEM; | |
7f9d68ac | 424 | goto out; |
119aecba | 425 | } |
7f9d68ac XL |
426 | |
427 | if (out) { | |
428 | if (str_nums) | |
429 | for (i = 0; i < str_nums; i++) | |
05364ca0 | 430 | SCTP_SO(stream, str_list[i])->state = |
7f9d68ac XL |
431 | SCTP_STREAM_CLOSED; |
432 | else | |
433 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 434 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
7f9d68ac XL |
435 | } |
436 | ||
7f9d68ac XL |
437 | asoc->strreset_chunk = chunk; |
438 | sctp_chunk_hold(asoc->strreset_chunk); | |
439 | ||
440 | retval = sctp_send_reconf(asoc, chunk); | |
441 | if (retval) { | |
442 | sctp_chunk_put(asoc->strreset_chunk); | |
443 | asoc->strreset_chunk = NULL; | |
119aecba XL |
444 | if (!out) |
445 | goto out; | |
446 | ||
447 | if (str_nums) | |
448 | for (i = 0; i < str_nums; i++) | |
05364ca0 | 449 | SCTP_SO(stream, str_list[i])->state = |
119aecba XL |
450 | SCTP_STREAM_OPEN; |
451 | else | |
452 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 453 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
119aecba XL |
454 | |
455 | goto out; | |
7f9d68ac XL |
456 | } |
457 | ||
119aecba XL |
458 | asoc->strreset_outstanding = out + in; |
459 | ||
7f9d68ac XL |
460 | out: |
461 | return retval; | |
462 | } | |
a92ce1a4 XL |
463 | |
464 | int sctp_send_reset_assoc(struct sctp_association *asoc) | |
465 | { | |
cee360ab | 466 | struct sctp_stream *stream = &asoc->stream; |
a92ce1a4 XL |
467 | struct sctp_chunk *chunk = NULL; |
468 | int retval; | |
469 | __u16 i; | |
470 | ||
471 | if (!asoc->peer.reconf_capable || | |
472 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
473 | return -ENOPROTOOPT; | |
474 | ||
475 | if (asoc->strreset_outstanding) | |
476 | return -EINPROGRESS; | |
477 | ||
5c6144a0 XL |
478 | if (!sctp_outq_is_empty(&asoc->outqueue)) |
479 | return -EAGAIN; | |
480 | ||
a92ce1a4 XL |
481 | chunk = sctp_make_strreset_tsnreq(asoc); |
482 | if (!chunk) | |
483 | return -ENOMEM; | |
484 | ||
485 | /* Block further xmit of data until this request is completed */ | |
cee360ab | 486 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 487 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
a92ce1a4 XL |
488 | |
489 | asoc->strreset_chunk = chunk; | |
490 | sctp_chunk_hold(asoc->strreset_chunk); | |
491 | ||
492 | retval = sctp_send_reconf(asoc, chunk); | |
493 | if (retval) { | |
494 | sctp_chunk_put(asoc->strreset_chunk); | |
495 | asoc->strreset_chunk = NULL; | |
496 | ||
cee360ab | 497 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 498 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
a92ce1a4 XL |
499 | |
500 | return retval; | |
501 | } | |
502 | ||
503 | asoc->strreset_outstanding = 1; | |
504 | ||
505 | return 0; | |
506 | } | |
242bd2d5 XL |
507 | |
508 | int sctp_send_add_streams(struct sctp_association *asoc, | |
509 | struct sctp_add_streams *params) | |
510 | { | |
cee360ab | 511 | struct sctp_stream *stream = &asoc->stream; |
242bd2d5 | 512 | struct sctp_chunk *chunk = NULL; |
dc82673f | 513 | int retval; |
242bd2d5 XL |
514 | __u32 outcnt, incnt; |
515 | __u16 out, in; | |
516 | ||
517 | if (!asoc->peer.reconf_capable || | |
518 | !(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) { | |
519 | retval = -ENOPROTOOPT; | |
520 | goto out; | |
521 | } | |
522 | ||
523 | if (asoc->strreset_outstanding) { | |
524 | retval = -EINPROGRESS; | |
525 | goto out; | |
526 | } | |
527 | ||
528 | out = params->sas_outstrms; | |
529 | in = params->sas_instrms; | |
530 | outcnt = stream->outcnt + out; | |
531 | incnt = stream->incnt + in; | |
532 | if (outcnt > SCTP_MAX_STREAM || incnt > SCTP_MAX_STREAM || | |
533 | (!out && !in)) { | |
534 | retval = -EINVAL; | |
535 | goto out; | |
536 | } | |
537 | ||
538 | if (out) { | |
e090abd0 MRL |
539 | retval = sctp_stream_alloc_out(stream, outcnt, GFP_KERNEL); |
540 | if (retval) | |
242bd2d5 | 541 | goto out; |
242bd2d5 XL |
542 | } |
543 | ||
242bd2d5 | 544 | chunk = sctp_make_strreset_addstrm(asoc, out, in); |
dc82673f WY |
545 | if (!chunk) { |
546 | retval = -ENOMEM; | |
242bd2d5 | 547 | goto out; |
dc82673f | 548 | } |
242bd2d5 XL |
549 | |
550 | asoc->strreset_chunk = chunk; | |
551 | sctp_chunk_hold(asoc->strreset_chunk); | |
552 | ||
553 | retval = sctp_send_reconf(asoc, chunk); | |
554 | if (retval) { | |
555 | sctp_chunk_put(asoc->strreset_chunk); | |
556 | asoc->strreset_chunk = NULL; | |
557 | goto out; | |
558 | } | |
559 | ||
242bd2d5 XL |
560 | stream->outcnt = outcnt; |
561 | ||
562 | asoc->strreset_outstanding = !!out + !!in; | |
563 | ||
564 | out: | |
565 | return retval; | |
566 | } | |
81054476 | 567 | |
3c918704 | 568 | static struct sctp_paramhdr *sctp_chunk_lookup_strreset_param( |
1da4fc97 | 569 | struct sctp_association *asoc, __be32 resp_seq, |
50a41591 | 570 | __be16 type) |
81054476 XL |
571 | { |
572 | struct sctp_chunk *chunk = asoc->strreset_chunk; | |
573 | struct sctp_reconf_chunk *hdr; | |
574 | union sctp_params param; | |
575 | ||
50a41591 | 576 | if (!chunk) |
81054476 XL |
577 | return NULL; |
578 | ||
579 | hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr; | |
580 | sctp_walk_params(param, hdr, params) { | |
581 | /* sctp_strreset_tsnreq is actually the basic structure | |
582 | * of all stream reconf params, so it's safe to use it | |
583 | * to access request_seq. | |
584 | */ | |
585 | struct sctp_strreset_tsnreq *req = param.v; | |
586 | ||
50a41591 XL |
587 | if ((!resp_seq || req->request_seq == resp_seq) && |
588 | (!type || type == req->param_hdr.type)) | |
81054476 XL |
589 | return param.v; |
590 | } | |
591 | ||
592 | return NULL; | |
593 | } | |
594 | ||
e4dc99c7 XL |
595 | static void sctp_update_strreset_result(struct sctp_association *asoc, |
596 | __u32 result) | |
597 | { | |
598 | asoc->strreset_result[1] = asoc->strreset_result[0]; | |
599 | asoc->strreset_result[0] = result; | |
600 | } | |
601 | ||
81054476 XL |
602 | struct sctp_chunk *sctp_process_strreset_outreq( |
603 | struct sctp_association *asoc, | |
604 | union sctp_params param, | |
605 | struct sctp_ulpevent **evp) | |
606 | { | |
607 | struct sctp_strreset_outreq *outreq = param.v; | |
cee360ab | 608 | struct sctp_stream *stream = &asoc->stream; |
81054476 | 609 | __u32 result = SCTP_STRRESET_DENIED; |
1da4fc97 | 610 | __be16 *str_p = NULL; |
81054476 | 611 | __u32 request_seq; |
2e6dc4d9 | 612 | __u16 i, nums; |
81054476 XL |
613 | |
614 | request_seq = ntohl(outreq->request_seq); | |
615 | ||
616 | if (ntohl(outreq->send_reset_at_tsn) > | |
617 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map)) { | |
618 | result = SCTP_STRRESET_IN_PROGRESS; | |
e4dc99c7 | 619 | goto err; |
81054476 XL |
620 | } |
621 | ||
e4dc99c7 XL |
622 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
623 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
81054476 | 624 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
625 | goto err; |
626 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
627 | i = asoc->strreset_inseq - request_seq - 1; | |
628 | result = asoc->strreset_result[i]; | |
629 | goto err; | |
81054476 | 630 | } |
e4dc99c7 | 631 | asoc->strreset_inseq++; |
81054476 XL |
632 | |
633 | /* Check strreset_enable after inseq inc, as sender cannot tell | |
634 | * the peer doesn't enable strreset after receiving response with | |
635 | * result denied, as well as to keep consistent with bsd. | |
636 | */ | |
637 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
638 | goto out; | |
639 | ||
2e6dc4d9 XL |
640 | nums = (ntohs(param.p->length) - sizeof(*outreq)) / sizeof(__u16); |
641 | str_p = outreq->list_of_streams; | |
642 | for (i = 0; i < nums; i++) { | |
643 | if (ntohs(str_p[i]) >= stream->incnt) { | |
644 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
645 | goto out; | |
646 | } | |
647 | } | |
648 | ||
81054476 | 649 | if (asoc->strreset_chunk) { |
50a41591 XL |
650 | if (!sctp_chunk_lookup_strreset_param( |
651 | asoc, outreq->response_seq, | |
652 | SCTP_PARAM_RESET_IN_REQUEST)) { | |
81054476 XL |
653 | /* same process with outstanding isn't 0 */ |
654 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
655 | goto out; | |
656 | } | |
657 | ||
658 | asoc->strreset_outstanding--; | |
659 | asoc->strreset_outseq++; | |
660 | ||
661 | if (!asoc->strreset_outstanding) { | |
50a41591 XL |
662 | struct sctp_transport *t; |
663 | ||
81054476 XL |
664 | t = asoc->strreset_chunk->transport; |
665 | if (del_timer(&t->reconf_timer)) | |
666 | sctp_transport_put(t); | |
667 | ||
668 | sctp_chunk_put(asoc->strreset_chunk); | |
669 | asoc->strreset_chunk = NULL; | |
670 | } | |
81054476 XL |
671 | } |
672 | ||
2e6dc4d9 | 673 | if (nums) |
81054476 | 674 | for (i = 0; i < nums; i++) |
05364ca0 | 675 | SCTP_SI(stream, ntohs(str_p[i]))->mid = 0; |
2e6dc4d9 | 676 | else |
81054476 | 677 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 678 | SCTP_SI(stream, i)->mid = 0; |
81054476 XL |
679 | |
680 | result = SCTP_STRRESET_PERFORMED; | |
681 | ||
682 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, | |
2e6dc4d9 | 683 | SCTP_STREAM_RESET_INCOMING_SSN, nums, str_p, GFP_ATOMIC); |
81054476 XL |
684 | |
685 | out: | |
e4dc99c7 XL |
686 | sctp_update_strreset_result(asoc, result); |
687 | err: | |
81054476 XL |
688 | return sctp_make_strreset_resp(asoc, result, request_seq); |
689 | } | |
16e1a919 XL |
690 | |
691 | struct sctp_chunk *sctp_process_strreset_inreq( | |
692 | struct sctp_association *asoc, | |
693 | union sctp_params param, | |
694 | struct sctp_ulpevent **evp) | |
695 | { | |
696 | struct sctp_strreset_inreq *inreq = param.v; | |
cee360ab | 697 | struct sctp_stream *stream = &asoc->stream; |
16e1a919 XL |
698 | __u32 result = SCTP_STRRESET_DENIED; |
699 | struct sctp_chunk *chunk = NULL; | |
16e1a919 | 700 | __u32 request_seq; |
1da4fc97 XL |
701 | __u16 i, nums; |
702 | __be16 *str_p; | |
16e1a919 XL |
703 | |
704 | request_seq = ntohl(inreq->request_seq); | |
d0f025e6 XL |
705 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
706 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
16e1a919 | 707 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
708 | goto err; |
709 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
710 | i = asoc->strreset_inseq - request_seq - 1; | |
711 | result = asoc->strreset_result[i]; | |
712 | if (result == SCTP_STRRESET_PERFORMED) | |
713 | return NULL; | |
714 | goto err; | |
16e1a919 | 715 | } |
d0f025e6 | 716 | asoc->strreset_inseq++; |
16e1a919 XL |
717 | |
718 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
719 | goto out; | |
720 | ||
721 | if (asoc->strreset_outstanding) { | |
722 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
723 | goto out; | |
724 | } | |
725 | ||
3aa623da | 726 | nums = (ntohs(param.p->length) - sizeof(*inreq)) / sizeof(__u16); |
16e1a919 XL |
727 | str_p = inreq->list_of_streams; |
728 | for (i = 0; i < nums; i++) { | |
729 | if (ntohs(str_p[i]) >= stream->outcnt) { | |
730 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
731 | goto out; | |
732 | } | |
733 | } | |
734 | ||
d570a59c XL |
735 | if (!sctp_stream_outq_is_empty(stream, nums, str_p)) { |
736 | result = SCTP_STRRESET_IN_PROGRESS; | |
737 | asoc->strreset_inseq--; | |
738 | goto err; | |
739 | } | |
740 | ||
16e1a919 XL |
741 | chunk = sctp_make_strreset_req(asoc, nums, str_p, 1, 0); |
742 | if (!chunk) | |
743 | goto out; | |
744 | ||
745 | if (nums) | |
746 | for (i = 0; i < nums; i++) | |
05364ca0 | 747 | SCTP_SO(stream, ntohs(str_p[i]))->state = |
16e1a919 XL |
748 | SCTP_STREAM_CLOSED; |
749 | else | |
750 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 751 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
16e1a919 XL |
752 | |
753 | asoc->strreset_chunk = chunk; | |
754 | asoc->strreset_outstanding = 1; | |
755 | sctp_chunk_hold(asoc->strreset_chunk); | |
756 | ||
d0f025e6 XL |
757 | result = SCTP_STRRESET_PERFORMED; |
758 | ||
16e1a919 | 759 | out: |
d0f025e6 XL |
760 | sctp_update_strreset_result(asoc, result); |
761 | err: | |
16e1a919 XL |
762 | if (!chunk) |
763 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
764 | ||
765 | return chunk; | |
766 | } | |
692787ce XL |
767 | |
768 | struct sctp_chunk *sctp_process_strreset_tsnreq( | |
769 | struct sctp_association *asoc, | |
770 | union sctp_params param, | |
771 | struct sctp_ulpevent **evp) | |
772 | { | |
773 | __u32 init_tsn = 0, next_tsn = 0, max_tsn_seen; | |
774 | struct sctp_strreset_tsnreq *tsnreq = param.v; | |
cee360ab | 775 | struct sctp_stream *stream = &asoc->stream; |
692787ce XL |
776 | __u32 result = SCTP_STRRESET_DENIED; |
777 | __u32 request_seq; | |
778 | __u16 i; | |
779 | ||
780 | request_seq = ntohl(tsnreq->request_seq); | |
6c801387 XL |
781 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
782 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
692787ce | 783 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
6c801387 XL |
784 | goto err; |
785 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
786 | i = asoc->strreset_inseq - request_seq - 1; | |
787 | result = asoc->strreset_result[i]; | |
788 | if (result == SCTP_STRRESET_PERFORMED) { | |
52a39589 | 789 | next_tsn = asoc->ctsn_ack_point + 1; |
6c801387 XL |
790 | init_tsn = |
791 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + 1; | |
792 | } | |
793 | goto err; | |
692787ce | 794 | } |
5c6144a0 XL |
795 | |
796 | if (!sctp_outq_is_empty(&asoc->outqueue)) { | |
797 | result = SCTP_STRRESET_IN_PROGRESS; | |
798 | goto err; | |
799 | } | |
800 | ||
6c801387 | 801 | asoc->strreset_inseq++; |
692787ce XL |
802 | |
803 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
804 | goto out; | |
805 | ||
806 | if (asoc->strreset_outstanding) { | |
807 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
808 | goto out; | |
809 | } | |
810 | ||
159f2a74 XL |
811 | /* G4: The same processing as though a FWD-TSN chunk (as defined in |
812 | * [RFC3758]) with all streams affected and a new cumulative TSN | |
813 | * ACK of the Receiver's Next TSN minus 1 were received MUST be | |
814 | * performed. | |
692787ce XL |
815 | */ |
816 | max_tsn_seen = sctp_tsnmap_get_max_tsn_seen(&asoc->peer.tsn_map); | |
47b20a88 | 817 | asoc->stream.si->report_ftsn(&asoc->ulpq, max_tsn_seen); |
692787ce XL |
818 | |
819 | /* G1: Compute an appropriate value for the Receiver's Next TSN -- the | |
820 | * TSN that the peer should use to send the next DATA chunk. The | |
821 | * value SHOULD be the smallest TSN not acknowledged by the | |
822 | * receiver of the request plus 2^31. | |
823 | */ | |
824 | init_tsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + (1 << 31); | |
825 | sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_INITIAL, | |
826 | init_tsn, GFP_ATOMIC); | |
827 | ||
159f2a74 XL |
828 | /* G3: The same processing as though a SACK chunk with no gap report |
829 | * and a cumulative TSN ACK of the Sender's Next TSN minus 1 were | |
830 | * received MUST be performed. | |
692787ce XL |
831 | */ |
832 | sctp_outq_free(&asoc->outqueue); | |
833 | ||
834 | /* G2: Compute an appropriate value for the local endpoint's next TSN, | |
835 | * i.e., the next TSN assigned by the receiver of the SSN/TSN reset | |
836 | * chunk. The value SHOULD be the highest TSN sent by the receiver | |
837 | * of the request plus 1. | |
838 | */ | |
839 | next_tsn = asoc->next_tsn; | |
840 | asoc->ctsn_ack_point = next_tsn - 1; | |
841 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
842 | ||
843 | /* G5: The next expected and outgoing SSNs MUST be reset to 0 for all | |
844 | * incoming and outgoing streams. | |
845 | */ | |
107e2425 | 846 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
847 | SCTP_SO(stream, i)->mid = 0; |
848 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 849 | } |
692787ce | 850 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 851 | SCTP_SI(stream, i)->mid = 0; |
692787ce XL |
852 | |
853 | result = SCTP_STRRESET_PERFORMED; | |
854 | ||
855 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, 0, init_tsn, | |
856 | next_tsn, GFP_ATOMIC); | |
857 | ||
858 | out: | |
6c801387 XL |
859 | sctp_update_strreset_result(asoc, result); |
860 | err: | |
692787ce XL |
861 | return sctp_make_strreset_tsnresp(asoc, result, request_seq, |
862 | next_tsn, init_tsn); | |
863 | } | |
50a41591 XL |
864 | |
865 | struct sctp_chunk *sctp_process_strreset_addstrm_out( | |
866 | struct sctp_association *asoc, | |
867 | union sctp_params param, | |
868 | struct sctp_ulpevent **evp) | |
869 | { | |
870 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 871 | struct sctp_stream *stream = &asoc->stream; |
50a41591 | 872 | __u32 result = SCTP_STRRESET_DENIED; |
50a41591 | 873 | __u32 request_seq, incnt; |
e4dc99c7 | 874 | __u16 in, i; |
50a41591 XL |
875 | |
876 | request_seq = ntohl(addstrm->request_seq); | |
e4dc99c7 XL |
877 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
878 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
50a41591 | 879 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
880 | goto err; |
881 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
882 | i = asoc->strreset_inseq - request_seq - 1; | |
883 | result = asoc->strreset_result[i]; | |
884 | goto err; | |
50a41591 | 885 | } |
e4dc99c7 | 886 | asoc->strreset_inseq++; |
50a41591 XL |
887 | |
888 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
889 | goto out; | |
890 | ||
8220c870 XL |
891 | in = ntohs(addstrm->number_of_streams); |
892 | incnt = stream->incnt + in; | |
893 | if (!in || incnt > SCTP_MAX_STREAM) | |
894 | goto out; | |
895 | ||
896 | if (sctp_stream_alloc_in(stream, incnt, GFP_ATOMIC)) | |
897 | goto out; | |
898 | ||
50a41591 XL |
899 | if (asoc->strreset_chunk) { |
900 | if (!sctp_chunk_lookup_strreset_param( | |
901 | asoc, 0, SCTP_PARAM_RESET_ADD_IN_STREAMS)) { | |
902 | /* same process with outstanding isn't 0 */ | |
903 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
904 | goto out; | |
905 | } | |
906 | ||
907 | asoc->strreset_outstanding--; | |
908 | asoc->strreset_outseq++; | |
909 | ||
910 | if (!asoc->strreset_outstanding) { | |
911 | struct sctp_transport *t; | |
912 | ||
913 | t = asoc->strreset_chunk->transport; | |
914 | if (del_timer(&t->reconf_timer)) | |
915 | sctp_transport_put(t); | |
916 | ||
917 | sctp_chunk_put(asoc->strreset_chunk); | |
918 | asoc->strreset_chunk = NULL; | |
919 | } | |
920 | } | |
921 | ||
50a41591 XL |
922 | stream->incnt = incnt; |
923 | ||
924 | result = SCTP_STRRESET_PERFORMED; | |
925 | ||
926 | *evp = sctp_ulpevent_make_stream_change_event(asoc, | |
927 | 0, ntohs(addstrm->number_of_streams), 0, GFP_ATOMIC); | |
928 | ||
929 | out: | |
e4dc99c7 XL |
930 | sctp_update_strreset_result(asoc, result); |
931 | err: | |
50a41591 XL |
932 | return sctp_make_strreset_resp(asoc, result, request_seq); |
933 | } | |
c5c4ebb3 XL |
934 | |
935 | struct sctp_chunk *sctp_process_strreset_addstrm_in( | |
936 | struct sctp_association *asoc, | |
937 | union sctp_params param, | |
938 | struct sctp_ulpevent **evp) | |
939 | { | |
940 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 941 | struct sctp_stream *stream = &asoc->stream; |
c5c4ebb3 | 942 | __u32 result = SCTP_STRRESET_DENIED; |
c5c4ebb3 XL |
943 | struct sctp_chunk *chunk = NULL; |
944 | __u32 request_seq, outcnt; | |
d0f025e6 | 945 | __u16 out, i; |
e090abd0 | 946 | int ret; |
c5c4ebb3 XL |
947 | |
948 | request_seq = ntohl(addstrm->request_seq); | |
d0f025e6 XL |
949 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
950 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
c5c4ebb3 | 951 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
952 | goto err; |
953 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
954 | i = asoc->strreset_inseq - request_seq - 1; | |
955 | result = asoc->strreset_result[i]; | |
956 | if (result == SCTP_STRRESET_PERFORMED) | |
957 | return NULL; | |
958 | goto err; | |
c5c4ebb3 | 959 | } |
d0f025e6 | 960 | asoc->strreset_inseq++; |
c5c4ebb3 XL |
961 | |
962 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
963 | goto out; | |
964 | ||
965 | if (asoc->strreset_outstanding) { | |
966 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
967 | goto out; | |
968 | } | |
969 | ||
970 | out = ntohs(addstrm->number_of_streams); | |
971 | outcnt = stream->outcnt + out; | |
972 | if (!out || outcnt > SCTP_MAX_STREAM) | |
973 | goto out; | |
974 | ||
e090abd0 MRL |
975 | ret = sctp_stream_alloc_out(stream, outcnt, GFP_ATOMIC); |
976 | if (ret) | |
c5c4ebb3 XL |
977 | goto out; |
978 | ||
c5c4ebb3 XL |
979 | chunk = sctp_make_strreset_addstrm(asoc, out, 0); |
980 | if (!chunk) | |
981 | goto out; | |
982 | ||
983 | asoc->strreset_chunk = chunk; | |
984 | asoc->strreset_outstanding = 1; | |
985 | sctp_chunk_hold(asoc->strreset_chunk); | |
986 | ||
987 | stream->outcnt = outcnt; | |
988 | ||
d0f025e6 XL |
989 | result = SCTP_STRRESET_PERFORMED; |
990 | ||
c5c4ebb3 | 991 | out: |
d0f025e6 XL |
992 | sctp_update_strreset_result(asoc, result); |
993 | err: | |
c5c4ebb3 XL |
994 | if (!chunk) |
995 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
996 | ||
997 | return chunk; | |
998 | } | |
11ae76e6 XL |
999 | |
1000 | struct sctp_chunk *sctp_process_strreset_resp( | |
1001 | struct sctp_association *asoc, | |
1002 | union sctp_params param, | |
1003 | struct sctp_ulpevent **evp) | |
1004 | { | |
cee360ab | 1005 | struct sctp_stream *stream = &asoc->stream; |
11ae76e6 | 1006 | struct sctp_strreset_resp *resp = param.v; |
11ae76e6 XL |
1007 | struct sctp_transport *t; |
1008 | __u16 i, nums, flags = 0; | |
3c918704 | 1009 | struct sctp_paramhdr *req; |
11ae76e6 XL |
1010 | __u32 result; |
1011 | ||
1012 | req = sctp_chunk_lookup_strreset_param(asoc, resp->response_seq, 0); | |
1013 | if (!req) | |
1014 | return NULL; | |
1015 | ||
1016 | result = ntohl(resp->result); | |
1017 | if (result != SCTP_STRRESET_PERFORMED) { | |
1018 | /* if in progress, do nothing but retransmit */ | |
1019 | if (result == SCTP_STRRESET_IN_PROGRESS) | |
1020 | return NULL; | |
1021 | else if (result == SCTP_STRRESET_DENIED) | |
1022 | flags = SCTP_STREAM_RESET_DENIED; | |
1023 | else | |
1024 | flags = SCTP_STREAM_RESET_FAILED; | |
1025 | } | |
1026 | ||
1027 | if (req->type == SCTP_PARAM_RESET_OUT_REQUEST) { | |
1028 | struct sctp_strreset_outreq *outreq; | |
1da4fc97 | 1029 | __be16 *str_p; |
11ae76e6 XL |
1030 | |
1031 | outreq = (struct sctp_strreset_outreq *)req; | |
edb12f2d | 1032 | str_p = outreq->list_of_streams; |
3aa623da XL |
1033 | nums = (ntohs(outreq->param_hdr.length) - sizeof(*outreq)) / |
1034 | sizeof(__u16); | |
11ae76e6 XL |
1035 | |
1036 | if (result == SCTP_STRRESET_PERFORMED) { | |
05364ca0 | 1037 | struct sctp_stream_out *sout; |
11ae76e6 | 1038 | if (nums) { |
107e2425 | 1039 | for (i = 0; i < nums; i++) { |
05364ca0 KK |
1040 | sout = SCTP_SO(stream, ntohs(str_p[i])); |
1041 | sout->mid = 0; | |
1042 | sout->mid_uo = 0; | |
107e2425 | 1043 | } |
11ae76e6 | 1044 | } else { |
107e2425 | 1045 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
1046 | sout = SCTP_SO(stream, i); |
1047 | sout->mid = 0; | |
1048 | sout->mid_uo = 0; | |
107e2425 | 1049 | } |
11ae76e6 | 1050 | } |
11ae76e6 XL |
1051 | } |
1052 | ||
2e6dc4d9 XL |
1053 | flags |= SCTP_STREAM_RESET_OUTGOING_SSN; |
1054 | ||
11ae76e6 | 1055 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 1056 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
11ae76e6 XL |
1057 | |
1058 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, | |
1059 | nums, str_p, GFP_ATOMIC); | |
1060 | } else if (req->type == SCTP_PARAM_RESET_IN_REQUEST) { | |
1061 | struct sctp_strreset_inreq *inreq; | |
1da4fc97 | 1062 | __be16 *str_p; |
11ae76e6 XL |
1063 | |
1064 | /* if the result is performed, it's impossible for inreq */ | |
1065 | if (result == SCTP_STRRESET_PERFORMED) | |
1066 | return NULL; | |
1067 | ||
1068 | inreq = (struct sctp_strreset_inreq *)req; | |
edb12f2d | 1069 | str_p = inreq->list_of_streams; |
3aa623da XL |
1070 | nums = (ntohs(inreq->param_hdr.length) - sizeof(*inreq)) / |
1071 | sizeof(__u16); | |
11ae76e6 | 1072 | |
2e6dc4d9 XL |
1073 | flags |= SCTP_STREAM_RESET_INCOMING_SSN; |
1074 | ||
11ae76e6 XL |
1075 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, |
1076 | nums, str_p, GFP_ATOMIC); | |
1077 | } else if (req->type == SCTP_PARAM_RESET_TSN_REQUEST) { | |
1078 | struct sctp_strreset_resptsn *resptsn; | |
1079 | __u32 stsn, rtsn; | |
1080 | ||
1081 | /* check for resptsn, as sctp_verify_reconf didn't do it*/ | |
1082 | if (ntohs(param.p->length) != sizeof(*resptsn)) | |
1083 | return NULL; | |
1084 | ||
1085 | resptsn = (struct sctp_strreset_resptsn *)resp; | |
1086 | stsn = ntohl(resptsn->senders_next_tsn); | |
1087 | rtsn = ntohl(resptsn->receivers_next_tsn); | |
1088 | ||
1089 | if (result == SCTP_STRRESET_PERFORMED) { | |
1090 | __u32 mtsn = sctp_tsnmap_get_max_tsn_seen( | |
1091 | &asoc->peer.tsn_map); | |
159f2a74 | 1092 | LIST_HEAD(temp); |
11ae76e6 | 1093 | |
47b20a88 | 1094 | asoc->stream.si->report_ftsn(&asoc->ulpq, mtsn); |
11ae76e6 XL |
1095 | |
1096 | sctp_tsnmap_init(&asoc->peer.tsn_map, | |
1097 | SCTP_TSN_MAP_INITIAL, | |
1098 | stsn, GFP_ATOMIC); | |
1099 | ||
159f2a74 XL |
1100 | /* Clean up sacked and abandoned queues only. As the |
1101 | * out_chunk_list may not be empty, splice it to temp, | |
1102 | * then get it back after sctp_outq_free is done. | |
1103 | */ | |
1104 | list_splice_init(&asoc->outqueue.out_chunk_list, &temp); | |
11ae76e6 | 1105 | sctp_outq_free(&asoc->outqueue); |
159f2a74 | 1106 | list_splice_init(&temp, &asoc->outqueue.out_chunk_list); |
11ae76e6 XL |
1107 | |
1108 | asoc->next_tsn = rtsn; | |
1109 | asoc->ctsn_ack_point = asoc->next_tsn - 1; | |
1110 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
1111 | ||
107e2425 | 1112 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
1113 | SCTP_SO(stream, i)->mid = 0; |
1114 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 1115 | } |
11ae76e6 | 1116 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 1117 | SCTP_SI(stream, i)->mid = 0; |
11ae76e6 XL |
1118 | } |
1119 | ||
1120 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 1121 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
11ae76e6 XL |
1122 | |
1123 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, flags, | |
1124 | stsn, rtsn, GFP_ATOMIC); | |
1125 | } else if (req->type == SCTP_PARAM_RESET_ADD_OUT_STREAMS) { | |
1126 | struct sctp_strreset_addstrm *addstrm; | |
1127 | __u16 number; | |
1128 | ||
1129 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1130 | nums = ntohs(addstrm->number_of_streams); | |
1131 | number = stream->outcnt - nums; | |
1132 | ||
1133 | if (result == SCTP_STRRESET_PERFORMED) | |
1134 | for (i = number; i < stream->outcnt; i++) | |
05364ca0 | 1135 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
11ae76e6 XL |
1136 | else |
1137 | stream->outcnt = number; | |
1138 | ||
1139 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1140 | 0, nums, GFP_ATOMIC); | |
1141 | } else if (req->type == SCTP_PARAM_RESET_ADD_IN_STREAMS) { | |
1142 | struct sctp_strreset_addstrm *addstrm; | |
1143 | ||
1144 | /* if the result is performed, it's impossible for addstrm in | |
1145 | * request. | |
1146 | */ | |
1147 | if (result == SCTP_STRRESET_PERFORMED) | |
1148 | return NULL; | |
1149 | ||
1150 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1151 | nums = ntohs(addstrm->number_of_streams); | |
1152 | ||
1153 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1154 | nums, 0, GFP_ATOMIC); | |
1155 | } | |
1156 | ||
1157 | asoc->strreset_outstanding--; | |
1158 | asoc->strreset_outseq++; | |
1159 | ||
1160 | /* remove everything for this reconf request */ | |
1161 | if (!asoc->strreset_outstanding) { | |
1162 | t = asoc->strreset_chunk->transport; | |
1163 | if (del_timer(&t->reconf_timer)) | |
1164 | sctp_transport_put(t); | |
1165 | ||
1166 | sctp_chunk_put(asoc->strreset_chunk); | |
1167 | asoc->strreset_chunk = NULL; | |
1168 | } | |
1169 | ||
1170 | return NULL; | |
1171 | } |