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