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