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Commit | Line | Data |
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47505b8b | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
a8386317 XL |
2 | /* SCTP kernel implementation |
3 | * (C) Copyright IBM Corp. 2001, 2004 | |
4 | * Copyright (c) 1999-2000 Cisco, Inc. | |
5 | * Copyright (c) 1999-2001 Motorola, Inc. | |
6 | * Copyright (c) 2001 Intel Corp. | |
7 | * | |
8 | * This file is part of the SCTP kernel implementation | |
9 | * | |
fae8b6f4 | 10 | * This file contains sctp stream maniuplation primitives and helpers. |
a8386317 | 11 | * |
a8386317 XL |
12 | * Please send any bug reports or fixes you make to the |
13 | * email address(es): | |
14 | * lksctp developers <linux-sctp@vger.kernel.org> | |
15 | * | |
16 | * Written or modified by: | |
17 | * Xin Long <lucien.xin@gmail.com> | |
18 | */ | |
19 | ||
5bbbbe32 | 20 | #include <linux/list.h> |
a8386317 | 21 | #include <net/sctp/sctp.h> |
7f9d68ac | 22 | #include <net/sctp/sm.h> |
5bbbbe32 MRL |
23 | #include <net/sctp/stream_sched.h> |
24 | ||
8f13399d | 25 | static void sctp_stream_shrink_out(struct sctp_stream *stream, __u16 outcnt) |
5bbbbe32 MRL |
26 | { |
27 | struct sctp_association *asoc; | |
28 | struct sctp_chunk *ch, *temp; | |
29 | struct sctp_outq *outq; | |
5bbbbe32 MRL |
30 | |
31 | asoc = container_of(stream, struct sctp_association, stream); | |
32 | outq = &asoc->outqueue; | |
33 | ||
34 | list_for_each_entry_safe(ch, temp, &outq->out_chunk_list, list) { | |
35 | __u16 sid = sctp_chunk_stream_no(ch); | |
36 | ||
37 | if (sid < outcnt) | |
38 | continue; | |
39 | ||
40 | sctp_sched_dequeue_common(outq, ch); | |
41 | /* No need to call dequeue_done here because | |
42 | * the chunks are not scheduled by now. | |
43 | */ | |
44 | ||
45 | /* Mark as failed send. */ | |
08f46070 | 46 | sctp_chunk_fail(ch, (__force __u32)SCTP_ERROR_INV_STRM); |
5bbbbe32 MRL |
47 | if (asoc->peer.prsctp_capable && |
48 | SCTP_PR_PRIO_ENABLED(ch->sinfo.sinfo_flags)) | |
49 | asoc->sent_cnt_removable--; | |
50 | ||
51 | sctp_chunk_free(ch); | |
52 | } | |
8f13399d XL |
53 | } |
54 | ||
55 | /* Migrates chunks from stream queues to new stream queues if needed, | |
56 | * but not across associations. Also, removes those chunks to streams | |
57 | * higher than the new max. | |
58 | */ | |
59 | static void sctp_stream_outq_migrate(struct sctp_stream *stream, | |
60 | struct sctp_stream *new, __u16 outcnt) | |
61 | { | |
62 | int i; | |
63 | ||
64 | if (stream->outcnt > outcnt) | |
65 | sctp_stream_shrink_out(stream, outcnt); | |
5bbbbe32 MRL |
66 | |
67 | if (new) { | |
68 | /* Here we actually move the old ext stuff into the new | |
69 | * buffer, because we want to keep it. Then | |
70 | * sctp_stream_update will swap ->out pointers. | |
71 | */ | |
72 | for (i = 0; i < outcnt; i++) { | |
0d493b4d KK |
73 | kfree(SCTP_SO(new, i)->ext); |
74 | SCTP_SO(new, i)->ext = SCTP_SO(stream, i)->ext; | |
75 | SCTP_SO(stream, i)->ext = NULL; | |
5bbbbe32 MRL |
76 | } |
77 | } | |
78 | ||
af98c5a7 | 79 | for (i = outcnt; i < stream->outcnt; i++) { |
0d493b4d | 80 | kfree(SCTP_SO(stream, i)->ext); |
af98c5a7 XL |
81 | SCTP_SO(stream, i)->ext = NULL; |
82 | } | |
5bbbbe32 | 83 | } |
a8386317 | 84 | |
e090abd0 MRL |
85 | static int sctp_stream_alloc_out(struct sctp_stream *stream, __u16 outcnt, |
86 | gfp_t gfp) | |
87 | { | |
2075e50c | 88 | int ret; |
e090abd0 | 89 | |
2075e50c | 90 | if (outcnt <= stream->outcnt) |
ab921f3c | 91 | goto out; |
cfe4bd7a | 92 | |
2075e50c | 93 | ret = genradix_prealloc(&stream->out, outcnt, gfp); |
61d5d406 | 94 | if (ret) |
2075e50c | 95 | return ret; |
e090abd0 | 96 | |
ab921f3c | 97 | out: |
2075e50c | 98 | stream->outcnt = outcnt; |
e090abd0 MRL |
99 | return 0; |
100 | } | |
101 | ||
1fdb8d8f MRL |
102 | static int sctp_stream_alloc_in(struct sctp_stream *stream, __u16 incnt, |
103 | gfp_t gfp) | |
104 | { | |
2075e50c | 105 | int ret; |
1fdb8d8f | 106 | |
2075e50c | 107 | if (incnt <= stream->incnt) |
ab921f3c | 108 | goto out; |
1fdb8d8f | 109 | |
2075e50c | 110 | ret = genradix_prealloc(&stream->in, incnt, gfp); |
61d5d406 | 111 | if (ret) |
2075e50c | 112 | return ret; |
1fdb8d8f | 113 | |
ab921f3c | 114 | out: |
2075e50c | 115 | stream->incnt = incnt; |
1fdb8d8f MRL |
116 | return 0; |
117 | } | |
118 | ||
ff356414 XL |
119 | int sctp_stream_init(struct sctp_stream *stream, __u16 outcnt, __u16 incnt, |
120 | gfp_t gfp) | |
a8386317 | 121 | { |
5bbbbe32 MRL |
122 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
123 | int i, ret = 0; | |
3dbcc105 | 124 | |
1ae2eaaa MRL |
125 | gfp |= __GFP_NOWARN; |
126 | ||
3dbcc105 | 127 | /* Initial stream->out size may be very big, so free it and alloc |
1ae2eaaa | 128 | * a new one with new outcnt to save memory if needed. |
3dbcc105 | 129 | */ |
1ae2eaaa | 130 | if (outcnt == stream->outcnt) |
61d5d406 | 131 | goto handle_in; |
1ae2eaaa | 132 | |
5bbbbe32 MRL |
133 | /* Filter out chunks queued on streams that won't exist anymore */ |
134 | sched->unsched_all(stream); | |
135 | sctp_stream_outq_migrate(stream, NULL, outcnt); | |
136 | sched->sched_all(stream); | |
137 | ||
79d08951 MRL |
138 | ret = sctp_stream_alloc_out(stream, outcnt, gfp); |
139 | if (ret) | |
61d5d406 | 140 | goto out_err; |
3dbcc105 XL |
141 | |
142 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 143 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
3dbcc105 | 144 | |
61d5d406 | 145 | handle_in: |
0c3f6f65 | 146 | sctp_stream_interleave_init(stream); |
ff356414 | 147 | if (!incnt) |
5bbbbe32 | 148 | goto out; |
ff356414 | 149 | |
79d08951 | 150 | ret = sctp_stream_alloc_in(stream, incnt, gfp); |
61d5d406 MRL |
151 | if (ret) |
152 | goto in_err; | |
153 | ||
154 | goto out; | |
a8386317 | 155 | |
61d5d406 MRL |
156 | in_err: |
157 | sched->free(stream); | |
158 | genradix_free(&stream->in); | |
159 | out_err: | |
160 | genradix_free(&stream->out); | |
161 | stream->outcnt = 0; | |
5bbbbe32 MRL |
162 | out: |
163 | return ret; | |
a8386317 XL |
164 | } |
165 | ||
f952be79 MRL |
166 | int sctp_stream_init_ext(struct sctp_stream *stream, __u16 sid) |
167 | { | |
168 | struct sctp_stream_out_ext *soute; | |
4d141581 | 169 | int ret; |
f952be79 MRL |
170 | |
171 | soute = kzalloc(sizeof(*soute), GFP_KERNEL); | |
172 | if (!soute) | |
173 | return -ENOMEM; | |
05364ca0 | 174 | SCTP_SO(stream, sid)->ext = soute; |
f952be79 | 175 | |
4d141581 MRL |
176 | ret = sctp_sched_init_sid(stream, sid, GFP_KERNEL); |
177 | if (ret) { | |
178 | kfree(SCTP_SO(stream, sid)->ext); | |
179 | SCTP_SO(stream, sid)->ext = NULL; | |
180 | } | |
181 | ||
182 | return ret; | |
f952be79 MRL |
183 | } |
184 | ||
a8386317 XL |
185 | void sctp_stream_free(struct sctp_stream *stream) |
186 | { | |
5bbbbe32 | 187 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
f952be79 MRL |
188 | int i; |
189 | ||
5bbbbe32 | 190 | sched->free(stream); |
f952be79 | 191 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 192 | kfree(SCTP_SO(stream, i)->ext); |
2075e50c KO |
193 | genradix_free(&stream->out); |
194 | genradix_free(&stream->in); | |
a8386317 XL |
195 | } |
196 | ||
197 | void sctp_stream_clear(struct sctp_stream *stream) | |
198 | { | |
199 | int i; | |
200 | ||
107e2425 | 201 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
202 | SCTP_SO(stream, i)->mid = 0; |
203 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 204 | } |
a8386317 XL |
205 | |
206 | for (i = 0; i < stream->incnt; i++) | |
05364ca0 | 207 | SCTP_SI(stream, i)->mid = 0; |
a8386317 | 208 | } |
7f9d68ac | 209 | |
cee360ab XL |
210 | void sctp_stream_update(struct sctp_stream *stream, struct sctp_stream *new) |
211 | { | |
5bbbbe32 MRL |
212 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
213 | ||
214 | sched->unsched_all(stream); | |
215 | sctp_stream_outq_migrate(stream, new, new->outcnt); | |
cee360ab XL |
216 | sctp_stream_free(stream); |
217 | ||
218 | stream->out = new->out; | |
219 | stream->in = new->in; | |
220 | stream->outcnt = new->outcnt; | |
221 | stream->incnt = new->incnt; | |
222 | ||
5bbbbe32 MRL |
223 | sched->sched_all(stream); |
224 | ||
2075e50c KO |
225 | new->out.tree.root = NULL; |
226 | new->in.tree.root = NULL; | |
6a9a27d5 XL |
227 | new->outcnt = 0; |
228 | new->incnt = 0; | |
cee360ab XL |
229 | } |
230 | ||
7f9d68ac XL |
231 | static int sctp_send_reconf(struct sctp_association *asoc, |
232 | struct sctp_chunk *chunk) | |
233 | { | |
7f9d68ac XL |
234 | int retval = 0; |
235 | ||
4e7696d9 | 236 | retval = sctp_primitive_RECONF(asoc->base.net, asoc, chunk); |
7f9d68ac XL |
237 | if (retval) |
238 | sctp_chunk_free(chunk); | |
239 | ||
240 | return retval; | |
241 | } | |
242 | ||
d570a59c XL |
243 | static bool sctp_stream_outq_is_empty(struct sctp_stream *stream, |
244 | __u16 str_nums, __be16 *str_list) | |
245 | { | |
246 | struct sctp_association *asoc; | |
247 | __u16 i; | |
248 | ||
249 | asoc = container_of(stream, struct sctp_association, stream); | |
250 | if (!asoc->outqueue.out_qlen) | |
251 | return true; | |
252 | ||
253 | if (!str_nums) | |
254 | return false; | |
255 | ||
256 | for (i = 0; i < str_nums; i++) { | |
257 | __u16 sid = ntohs(str_list[i]); | |
258 | ||
05364ca0 KK |
259 | if (SCTP_SO(stream, sid)->ext && |
260 | !list_empty(&SCTP_SO(stream, sid)->ext->outq)) | |
d570a59c XL |
261 | return false; |
262 | } | |
263 | ||
264 | return true; | |
265 | } | |
266 | ||
7f9d68ac XL |
267 | int sctp_send_reset_streams(struct sctp_association *asoc, |
268 | struct sctp_reset_streams *params) | |
269 | { | |
cee360ab | 270 | struct sctp_stream *stream = &asoc->stream; |
7f9d68ac XL |
271 | __u16 i, str_nums, *str_list; |
272 | struct sctp_chunk *chunk; | |
273 | int retval = -EINVAL; | |
1da4fc97 | 274 | __be16 *nstr_list; |
7f9d68ac XL |
275 | bool out, in; |
276 | ||
277 | if (!asoc->peer.reconf_capable || | |
278 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) { | |
279 | retval = -ENOPROTOOPT; | |
280 | goto out; | |
281 | } | |
282 | ||
283 | if (asoc->strreset_outstanding) { | |
284 | retval = -EINPROGRESS; | |
285 | goto out; | |
286 | } | |
287 | ||
288 | out = params->srs_flags & SCTP_STREAM_RESET_OUTGOING; | |
289 | in = params->srs_flags & SCTP_STREAM_RESET_INCOMING; | |
290 | if (!out && !in) | |
291 | goto out; | |
292 | ||
293 | str_nums = params->srs_number_streams; | |
294 | str_list = params->srs_stream_list; | |
423852f8 XL |
295 | if (str_nums) { |
296 | int param_len = 0; | |
297 | ||
298 | if (out) { | |
299 | for (i = 0; i < str_nums; i++) | |
300 | if (str_list[i] >= stream->outcnt) | |
301 | goto out; | |
302 | ||
303 | param_len = str_nums * sizeof(__u16) + | |
304 | sizeof(struct sctp_strreset_outreq); | |
305 | } | |
306 | ||
307 | if (in) { | |
308 | for (i = 0; i < str_nums; i++) | |
309 | if (str_list[i] >= stream->incnt) | |
310 | goto out; | |
311 | ||
312 | param_len += str_nums * sizeof(__u16) + | |
313 | sizeof(struct sctp_strreset_inreq); | |
314 | } | |
315 | ||
316 | if (param_len > SCTP_MAX_CHUNK_LEN - | |
317 | sizeof(struct sctp_reconf_chunk)) | |
318 | goto out; | |
319 | } | |
7f9d68ac | 320 | |
1da4fc97 XL |
321 | nstr_list = kcalloc(str_nums, sizeof(__be16), GFP_KERNEL); |
322 | if (!nstr_list) { | |
323 | retval = -ENOMEM; | |
324 | goto out; | |
325 | } | |
326 | ||
16e1a919 | 327 | for (i = 0; i < str_nums; i++) |
1da4fc97 | 328 | nstr_list[i] = htons(str_list[i]); |
16e1a919 | 329 | |
d570a59c | 330 | if (out && !sctp_stream_outq_is_empty(stream, str_nums, nstr_list)) { |
6d5afe20 | 331 | kfree(nstr_list); |
d570a59c XL |
332 | retval = -EAGAIN; |
333 | goto out; | |
334 | } | |
335 | ||
1da4fc97 | 336 | chunk = sctp_make_strreset_req(asoc, str_nums, nstr_list, out, in); |
16e1a919 | 337 | |
1da4fc97 | 338 | kfree(nstr_list); |
16e1a919 | 339 | |
119aecba XL |
340 | if (!chunk) { |
341 | retval = -ENOMEM; | |
7f9d68ac | 342 | goto out; |
119aecba | 343 | } |
7f9d68ac XL |
344 | |
345 | if (out) { | |
346 | if (str_nums) | |
347 | for (i = 0; i < str_nums; i++) | |
05364ca0 | 348 | SCTP_SO(stream, str_list[i])->state = |
7f9d68ac XL |
349 | SCTP_STREAM_CLOSED; |
350 | else | |
351 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 352 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
7f9d68ac XL |
353 | } |
354 | ||
7f9d68ac XL |
355 | asoc->strreset_chunk = chunk; |
356 | sctp_chunk_hold(asoc->strreset_chunk); | |
357 | ||
358 | retval = sctp_send_reconf(asoc, chunk); | |
359 | if (retval) { | |
360 | sctp_chunk_put(asoc->strreset_chunk); | |
361 | asoc->strreset_chunk = NULL; | |
119aecba XL |
362 | if (!out) |
363 | goto out; | |
364 | ||
365 | if (str_nums) | |
366 | for (i = 0; i < str_nums; i++) | |
05364ca0 | 367 | SCTP_SO(stream, str_list[i])->state = |
119aecba XL |
368 | SCTP_STREAM_OPEN; |
369 | else | |
370 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 371 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
119aecba XL |
372 | |
373 | goto out; | |
7f9d68ac XL |
374 | } |
375 | ||
119aecba XL |
376 | asoc->strreset_outstanding = out + in; |
377 | ||
7f9d68ac XL |
378 | out: |
379 | return retval; | |
380 | } | |
a92ce1a4 XL |
381 | |
382 | int sctp_send_reset_assoc(struct sctp_association *asoc) | |
383 | { | |
cee360ab | 384 | struct sctp_stream *stream = &asoc->stream; |
a92ce1a4 XL |
385 | struct sctp_chunk *chunk = NULL; |
386 | int retval; | |
387 | __u16 i; | |
388 | ||
389 | if (!asoc->peer.reconf_capable || | |
390 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
391 | return -ENOPROTOOPT; | |
392 | ||
393 | if (asoc->strreset_outstanding) | |
394 | return -EINPROGRESS; | |
395 | ||
5c6144a0 XL |
396 | if (!sctp_outq_is_empty(&asoc->outqueue)) |
397 | return -EAGAIN; | |
398 | ||
a92ce1a4 XL |
399 | chunk = sctp_make_strreset_tsnreq(asoc); |
400 | if (!chunk) | |
401 | return -ENOMEM; | |
402 | ||
403 | /* Block further xmit of data until this request is completed */ | |
cee360ab | 404 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 405 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
a92ce1a4 XL |
406 | |
407 | asoc->strreset_chunk = chunk; | |
408 | sctp_chunk_hold(asoc->strreset_chunk); | |
409 | ||
410 | retval = sctp_send_reconf(asoc, chunk); | |
411 | if (retval) { | |
412 | sctp_chunk_put(asoc->strreset_chunk); | |
413 | asoc->strreset_chunk = NULL; | |
414 | ||
cee360ab | 415 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 416 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
a92ce1a4 XL |
417 | |
418 | return retval; | |
419 | } | |
420 | ||
421 | asoc->strreset_outstanding = 1; | |
422 | ||
423 | return 0; | |
424 | } | |
242bd2d5 XL |
425 | |
426 | int sctp_send_add_streams(struct sctp_association *asoc, | |
427 | struct sctp_add_streams *params) | |
428 | { | |
cee360ab | 429 | struct sctp_stream *stream = &asoc->stream; |
242bd2d5 | 430 | struct sctp_chunk *chunk = NULL; |
dc82673f | 431 | int retval; |
242bd2d5 XL |
432 | __u32 outcnt, incnt; |
433 | __u16 out, in; | |
434 | ||
435 | if (!asoc->peer.reconf_capable || | |
436 | !(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) { | |
437 | retval = -ENOPROTOOPT; | |
438 | goto out; | |
439 | } | |
440 | ||
441 | if (asoc->strreset_outstanding) { | |
442 | retval = -EINPROGRESS; | |
443 | goto out; | |
444 | } | |
445 | ||
446 | out = params->sas_outstrms; | |
447 | in = params->sas_instrms; | |
448 | outcnt = stream->outcnt + out; | |
449 | incnt = stream->incnt + in; | |
450 | if (outcnt > SCTP_MAX_STREAM || incnt > SCTP_MAX_STREAM || | |
451 | (!out && !in)) { | |
452 | retval = -EINVAL; | |
453 | goto out; | |
454 | } | |
455 | ||
456 | if (out) { | |
e090abd0 MRL |
457 | retval = sctp_stream_alloc_out(stream, outcnt, GFP_KERNEL); |
458 | if (retval) | |
242bd2d5 | 459 | goto out; |
242bd2d5 XL |
460 | } |
461 | ||
242bd2d5 | 462 | chunk = sctp_make_strreset_addstrm(asoc, out, in); |
dc82673f WY |
463 | if (!chunk) { |
464 | retval = -ENOMEM; | |
242bd2d5 | 465 | goto out; |
dc82673f | 466 | } |
242bd2d5 XL |
467 | |
468 | asoc->strreset_chunk = chunk; | |
469 | sctp_chunk_hold(asoc->strreset_chunk); | |
470 | ||
471 | retval = sctp_send_reconf(asoc, chunk); | |
472 | if (retval) { | |
473 | sctp_chunk_put(asoc->strreset_chunk); | |
474 | asoc->strreset_chunk = NULL; | |
475 | goto out; | |
476 | } | |
477 | ||
242bd2d5 XL |
478 | asoc->strreset_outstanding = !!out + !!in; |
479 | ||
480 | out: | |
481 | return retval; | |
482 | } | |
81054476 | 483 | |
3c918704 | 484 | static struct sctp_paramhdr *sctp_chunk_lookup_strreset_param( |
1da4fc97 | 485 | struct sctp_association *asoc, __be32 resp_seq, |
50a41591 | 486 | __be16 type) |
81054476 XL |
487 | { |
488 | struct sctp_chunk *chunk = asoc->strreset_chunk; | |
489 | struct sctp_reconf_chunk *hdr; | |
490 | union sctp_params param; | |
491 | ||
50a41591 | 492 | if (!chunk) |
81054476 XL |
493 | return NULL; |
494 | ||
495 | hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr; | |
496 | sctp_walk_params(param, hdr, params) { | |
497 | /* sctp_strreset_tsnreq is actually the basic structure | |
498 | * of all stream reconf params, so it's safe to use it | |
499 | * to access request_seq. | |
500 | */ | |
501 | struct sctp_strreset_tsnreq *req = param.v; | |
502 | ||
50a41591 XL |
503 | if ((!resp_seq || req->request_seq == resp_seq) && |
504 | (!type || type == req->param_hdr.type)) | |
81054476 XL |
505 | return param.v; |
506 | } | |
507 | ||
508 | return NULL; | |
509 | } | |
510 | ||
e4dc99c7 XL |
511 | static void sctp_update_strreset_result(struct sctp_association *asoc, |
512 | __u32 result) | |
513 | { | |
514 | asoc->strreset_result[1] = asoc->strreset_result[0]; | |
515 | asoc->strreset_result[0] = result; | |
516 | } | |
517 | ||
81054476 XL |
518 | struct sctp_chunk *sctp_process_strreset_outreq( |
519 | struct sctp_association *asoc, | |
520 | union sctp_params param, | |
521 | struct sctp_ulpevent **evp) | |
522 | { | |
523 | struct sctp_strreset_outreq *outreq = param.v; | |
cee360ab | 524 | struct sctp_stream *stream = &asoc->stream; |
81054476 | 525 | __u32 result = SCTP_STRRESET_DENIED; |
1da4fc97 | 526 | __be16 *str_p = NULL; |
81054476 | 527 | __u32 request_seq; |
2e6dc4d9 | 528 | __u16 i, nums; |
81054476 XL |
529 | |
530 | request_seq = ntohl(outreq->request_seq); | |
531 | ||
532 | if (ntohl(outreq->send_reset_at_tsn) > | |
533 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map)) { | |
534 | result = SCTP_STRRESET_IN_PROGRESS; | |
e4dc99c7 | 535 | goto err; |
81054476 XL |
536 | } |
537 | ||
e4dc99c7 XL |
538 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
539 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
81054476 | 540 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
541 | goto err; |
542 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
543 | i = asoc->strreset_inseq - request_seq - 1; | |
544 | result = asoc->strreset_result[i]; | |
545 | goto err; | |
81054476 | 546 | } |
e4dc99c7 | 547 | asoc->strreset_inseq++; |
81054476 XL |
548 | |
549 | /* Check strreset_enable after inseq inc, as sender cannot tell | |
550 | * the peer doesn't enable strreset after receiving response with | |
551 | * result denied, as well as to keep consistent with bsd. | |
552 | */ | |
553 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
554 | goto out; | |
555 | ||
2e6dc4d9 XL |
556 | nums = (ntohs(param.p->length) - sizeof(*outreq)) / sizeof(__u16); |
557 | str_p = outreq->list_of_streams; | |
558 | for (i = 0; i < nums; i++) { | |
559 | if (ntohs(str_p[i]) >= stream->incnt) { | |
560 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
561 | goto out; | |
562 | } | |
563 | } | |
564 | ||
81054476 | 565 | if (asoc->strreset_chunk) { |
50a41591 XL |
566 | if (!sctp_chunk_lookup_strreset_param( |
567 | asoc, outreq->response_seq, | |
568 | SCTP_PARAM_RESET_IN_REQUEST)) { | |
81054476 XL |
569 | /* same process with outstanding isn't 0 */ |
570 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
571 | goto out; | |
572 | } | |
573 | ||
574 | asoc->strreset_outstanding--; | |
575 | asoc->strreset_outseq++; | |
576 | ||
577 | if (!asoc->strreset_outstanding) { | |
50a41591 XL |
578 | struct sctp_transport *t; |
579 | ||
81054476 XL |
580 | t = asoc->strreset_chunk->transport; |
581 | if (del_timer(&t->reconf_timer)) | |
582 | sctp_transport_put(t); | |
583 | ||
584 | sctp_chunk_put(asoc->strreset_chunk); | |
585 | asoc->strreset_chunk = NULL; | |
586 | } | |
81054476 XL |
587 | } |
588 | ||
2e6dc4d9 | 589 | if (nums) |
81054476 | 590 | for (i = 0; i < nums; i++) |
05364ca0 | 591 | SCTP_SI(stream, ntohs(str_p[i]))->mid = 0; |
2e6dc4d9 | 592 | else |
81054476 | 593 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 594 | SCTP_SI(stream, i)->mid = 0; |
81054476 XL |
595 | |
596 | result = SCTP_STRRESET_PERFORMED; | |
597 | ||
598 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, | |
2e6dc4d9 | 599 | SCTP_STREAM_RESET_INCOMING_SSN, nums, str_p, GFP_ATOMIC); |
81054476 XL |
600 | |
601 | out: | |
e4dc99c7 XL |
602 | sctp_update_strreset_result(asoc, result); |
603 | err: | |
81054476 XL |
604 | return sctp_make_strreset_resp(asoc, result, request_seq); |
605 | } | |
16e1a919 XL |
606 | |
607 | struct sctp_chunk *sctp_process_strreset_inreq( | |
608 | struct sctp_association *asoc, | |
609 | union sctp_params param, | |
610 | struct sctp_ulpevent **evp) | |
611 | { | |
612 | struct sctp_strreset_inreq *inreq = param.v; | |
cee360ab | 613 | struct sctp_stream *stream = &asoc->stream; |
16e1a919 XL |
614 | __u32 result = SCTP_STRRESET_DENIED; |
615 | struct sctp_chunk *chunk = NULL; | |
16e1a919 | 616 | __u32 request_seq; |
1da4fc97 XL |
617 | __u16 i, nums; |
618 | __be16 *str_p; | |
16e1a919 XL |
619 | |
620 | request_seq = ntohl(inreq->request_seq); | |
d0f025e6 XL |
621 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
622 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
16e1a919 | 623 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
624 | goto err; |
625 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
626 | i = asoc->strreset_inseq - request_seq - 1; | |
627 | result = asoc->strreset_result[i]; | |
628 | if (result == SCTP_STRRESET_PERFORMED) | |
629 | return NULL; | |
630 | goto err; | |
16e1a919 | 631 | } |
d0f025e6 | 632 | asoc->strreset_inseq++; |
16e1a919 XL |
633 | |
634 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
635 | goto out; | |
636 | ||
637 | if (asoc->strreset_outstanding) { | |
638 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
639 | goto out; | |
640 | } | |
641 | ||
3aa623da | 642 | nums = (ntohs(param.p->length) - sizeof(*inreq)) / sizeof(__u16); |
16e1a919 XL |
643 | str_p = inreq->list_of_streams; |
644 | for (i = 0; i < nums; i++) { | |
645 | if (ntohs(str_p[i]) >= stream->outcnt) { | |
646 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
647 | goto out; | |
648 | } | |
649 | } | |
650 | ||
d570a59c XL |
651 | if (!sctp_stream_outq_is_empty(stream, nums, str_p)) { |
652 | result = SCTP_STRRESET_IN_PROGRESS; | |
653 | asoc->strreset_inseq--; | |
654 | goto err; | |
655 | } | |
656 | ||
16e1a919 XL |
657 | chunk = sctp_make_strreset_req(asoc, nums, str_p, 1, 0); |
658 | if (!chunk) | |
659 | goto out; | |
660 | ||
661 | if (nums) | |
662 | for (i = 0; i < nums; i++) | |
05364ca0 | 663 | SCTP_SO(stream, ntohs(str_p[i]))->state = |
16e1a919 XL |
664 | SCTP_STREAM_CLOSED; |
665 | else | |
666 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 667 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
16e1a919 XL |
668 | |
669 | asoc->strreset_chunk = chunk; | |
670 | asoc->strreset_outstanding = 1; | |
671 | sctp_chunk_hold(asoc->strreset_chunk); | |
672 | ||
d0f025e6 XL |
673 | result = SCTP_STRRESET_PERFORMED; |
674 | ||
16e1a919 | 675 | out: |
d0f025e6 XL |
676 | sctp_update_strreset_result(asoc, result); |
677 | err: | |
16e1a919 XL |
678 | if (!chunk) |
679 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
680 | ||
681 | return chunk; | |
682 | } | |
692787ce XL |
683 | |
684 | struct sctp_chunk *sctp_process_strreset_tsnreq( | |
685 | struct sctp_association *asoc, | |
686 | union sctp_params param, | |
687 | struct sctp_ulpevent **evp) | |
688 | { | |
689 | __u32 init_tsn = 0, next_tsn = 0, max_tsn_seen; | |
690 | struct sctp_strreset_tsnreq *tsnreq = param.v; | |
cee360ab | 691 | struct sctp_stream *stream = &asoc->stream; |
692787ce XL |
692 | __u32 result = SCTP_STRRESET_DENIED; |
693 | __u32 request_seq; | |
694 | __u16 i; | |
695 | ||
696 | request_seq = ntohl(tsnreq->request_seq); | |
6c801387 XL |
697 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
698 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
692787ce | 699 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
6c801387 XL |
700 | goto err; |
701 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
702 | i = asoc->strreset_inseq - request_seq - 1; | |
703 | result = asoc->strreset_result[i]; | |
704 | if (result == SCTP_STRRESET_PERFORMED) { | |
52a39589 | 705 | next_tsn = asoc->ctsn_ack_point + 1; |
6c801387 XL |
706 | init_tsn = |
707 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + 1; | |
708 | } | |
709 | goto err; | |
692787ce | 710 | } |
5c6144a0 XL |
711 | |
712 | if (!sctp_outq_is_empty(&asoc->outqueue)) { | |
713 | result = SCTP_STRRESET_IN_PROGRESS; | |
714 | goto err; | |
715 | } | |
716 | ||
6c801387 | 717 | asoc->strreset_inseq++; |
692787ce XL |
718 | |
719 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
720 | goto out; | |
721 | ||
722 | if (asoc->strreset_outstanding) { | |
723 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
724 | goto out; | |
725 | } | |
726 | ||
159f2a74 XL |
727 | /* G4: The same processing as though a FWD-TSN chunk (as defined in |
728 | * [RFC3758]) with all streams affected and a new cumulative TSN | |
729 | * ACK of the Receiver's Next TSN minus 1 were received MUST be | |
730 | * performed. | |
692787ce XL |
731 | */ |
732 | max_tsn_seen = sctp_tsnmap_get_max_tsn_seen(&asoc->peer.tsn_map); | |
47b20a88 | 733 | asoc->stream.si->report_ftsn(&asoc->ulpq, max_tsn_seen); |
692787ce XL |
734 | |
735 | /* G1: Compute an appropriate value for the Receiver's Next TSN -- the | |
736 | * TSN that the peer should use to send the next DATA chunk. The | |
737 | * value SHOULD be the smallest TSN not acknowledged by the | |
738 | * receiver of the request plus 2^31. | |
739 | */ | |
740 | init_tsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + (1 << 31); | |
741 | sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_INITIAL, | |
742 | init_tsn, GFP_ATOMIC); | |
743 | ||
159f2a74 XL |
744 | /* G3: The same processing as though a SACK chunk with no gap report |
745 | * and a cumulative TSN ACK of the Sender's Next TSN minus 1 were | |
746 | * received MUST be performed. | |
692787ce XL |
747 | */ |
748 | sctp_outq_free(&asoc->outqueue); | |
749 | ||
750 | /* G2: Compute an appropriate value for the local endpoint's next TSN, | |
751 | * i.e., the next TSN assigned by the receiver of the SSN/TSN reset | |
752 | * chunk. The value SHOULD be the highest TSN sent by the receiver | |
753 | * of the request plus 1. | |
754 | */ | |
755 | next_tsn = asoc->next_tsn; | |
756 | asoc->ctsn_ack_point = next_tsn - 1; | |
757 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
758 | ||
759 | /* G5: The next expected and outgoing SSNs MUST be reset to 0 for all | |
760 | * incoming and outgoing streams. | |
761 | */ | |
107e2425 | 762 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
763 | SCTP_SO(stream, i)->mid = 0; |
764 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 765 | } |
692787ce | 766 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 767 | SCTP_SI(stream, i)->mid = 0; |
692787ce XL |
768 | |
769 | result = SCTP_STRRESET_PERFORMED; | |
770 | ||
771 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, 0, init_tsn, | |
772 | next_tsn, GFP_ATOMIC); | |
773 | ||
774 | out: | |
6c801387 XL |
775 | sctp_update_strreset_result(asoc, result); |
776 | err: | |
692787ce XL |
777 | return sctp_make_strreset_tsnresp(asoc, result, request_seq, |
778 | next_tsn, init_tsn); | |
779 | } | |
50a41591 XL |
780 | |
781 | struct sctp_chunk *sctp_process_strreset_addstrm_out( | |
782 | struct sctp_association *asoc, | |
783 | union sctp_params param, | |
784 | struct sctp_ulpevent **evp) | |
785 | { | |
786 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 787 | struct sctp_stream *stream = &asoc->stream; |
50a41591 | 788 | __u32 result = SCTP_STRRESET_DENIED; |
50a41591 | 789 | __u32 request_seq, incnt; |
e4dc99c7 | 790 | __u16 in, i; |
50a41591 XL |
791 | |
792 | request_seq = ntohl(addstrm->request_seq); | |
e4dc99c7 XL |
793 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
794 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
50a41591 | 795 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
796 | goto err; |
797 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
798 | i = asoc->strreset_inseq - request_seq - 1; | |
799 | result = asoc->strreset_result[i]; | |
800 | goto err; | |
50a41591 | 801 | } |
e4dc99c7 | 802 | asoc->strreset_inseq++; |
50a41591 XL |
803 | |
804 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
805 | goto out; | |
806 | ||
8220c870 XL |
807 | in = ntohs(addstrm->number_of_streams); |
808 | incnt = stream->incnt + in; | |
809 | if (!in || incnt > SCTP_MAX_STREAM) | |
810 | goto out; | |
811 | ||
812 | if (sctp_stream_alloc_in(stream, incnt, GFP_ATOMIC)) | |
813 | goto out; | |
814 | ||
50a41591 XL |
815 | if (asoc->strreset_chunk) { |
816 | if (!sctp_chunk_lookup_strreset_param( | |
817 | asoc, 0, SCTP_PARAM_RESET_ADD_IN_STREAMS)) { | |
818 | /* same process with outstanding isn't 0 */ | |
819 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
820 | goto out; | |
821 | } | |
822 | ||
823 | asoc->strreset_outstanding--; | |
824 | asoc->strreset_outseq++; | |
825 | ||
826 | if (!asoc->strreset_outstanding) { | |
827 | struct sctp_transport *t; | |
828 | ||
829 | t = asoc->strreset_chunk->transport; | |
830 | if (del_timer(&t->reconf_timer)) | |
831 | sctp_transport_put(t); | |
832 | ||
833 | sctp_chunk_put(asoc->strreset_chunk); | |
834 | asoc->strreset_chunk = NULL; | |
835 | } | |
836 | } | |
837 | ||
50a41591 XL |
838 | stream->incnt = incnt; |
839 | ||
840 | result = SCTP_STRRESET_PERFORMED; | |
841 | ||
842 | *evp = sctp_ulpevent_make_stream_change_event(asoc, | |
843 | 0, ntohs(addstrm->number_of_streams), 0, GFP_ATOMIC); | |
844 | ||
845 | out: | |
e4dc99c7 XL |
846 | sctp_update_strreset_result(asoc, result); |
847 | err: | |
50a41591 XL |
848 | return sctp_make_strreset_resp(asoc, result, request_seq); |
849 | } | |
c5c4ebb3 XL |
850 | |
851 | struct sctp_chunk *sctp_process_strreset_addstrm_in( | |
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; |
c5c4ebb3 | 858 | __u32 result = SCTP_STRRESET_DENIED; |
c5c4ebb3 XL |
859 | struct sctp_chunk *chunk = NULL; |
860 | __u32 request_seq, outcnt; | |
d0f025e6 | 861 | __u16 out, i; |
e090abd0 | 862 | int ret; |
c5c4ebb3 XL |
863 | |
864 | request_seq = ntohl(addstrm->request_seq); | |
d0f025e6 XL |
865 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
866 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
c5c4ebb3 | 867 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
868 | goto err; |
869 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
870 | i = asoc->strreset_inseq - request_seq - 1; | |
871 | result = asoc->strreset_result[i]; | |
872 | if (result == SCTP_STRRESET_PERFORMED) | |
873 | return NULL; | |
874 | goto err; | |
c5c4ebb3 | 875 | } |
d0f025e6 | 876 | asoc->strreset_inseq++; |
c5c4ebb3 XL |
877 | |
878 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
879 | goto out; | |
880 | ||
881 | if (asoc->strreset_outstanding) { | |
882 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
883 | goto out; | |
884 | } | |
885 | ||
886 | out = ntohs(addstrm->number_of_streams); | |
887 | outcnt = stream->outcnt + out; | |
888 | if (!out || outcnt > SCTP_MAX_STREAM) | |
889 | goto out; | |
890 | ||
e090abd0 MRL |
891 | ret = sctp_stream_alloc_out(stream, outcnt, GFP_ATOMIC); |
892 | if (ret) | |
c5c4ebb3 XL |
893 | goto out; |
894 | ||
c5c4ebb3 XL |
895 | chunk = sctp_make_strreset_addstrm(asoc, out, 0); |
896 | if (!chunk) | |
897 | goto out; | |
898 | ||
899 | asoc->strreset_chunk = chunk; | |
900 | asoc->strreset_outstanding = 1; | |
901 | sctp_chunk_hold(asoc->strreset_chunk); | |
902 | ||
903 | stream->outcnt = outcnt; | |
904 | ||
d0f025e6 XL |
905 | result = SCTP_STRRESET_PERFORMED; |
906 | ||
c5c4ebb3 | 907 | out: |
d0f025e6 XL |
908 | sctp_update_strreset_result(asoc, result); |
909 | err: | |
c5c4ebb3 XL |
910 | if (!chunk) |
911 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
912 | ||
913 | return chunk; | |
914 | } | |
11ae76e6 XL |
915 | |
916 | struct sctp_chunk *sctp_process_strreset_resp( | |
917 | struct sctp_association *asoc, | |
918 | union sctp_params param, | |
919 | struct sctp_ulpevent **evp) | |
920 | { | |
cee360ab | 921 | struct sctp_stream *stream = &asoc->stream; |
11ae76e6 | 922 | struct sctp_strreset_resp *resp = param.v; |
11ae76e6 XL |
923 | struct sctp_transport *t; |
924 | __u16 i, nums, flags = 0; | |
3c918704 | 925 | struct sctp_paramhdr *req; |
11ae76e6 XL |
926 | __u32 result; |
927 | ||
928 | req = sctp_chunk_lookup_strreset_param(asoc, resp->response_seq, 0); | |
929 | if (!req) | |
930 | return NULL; | |
931 | ||
932 | result = ntohl(resp->result); | |
933 | if (result != SCTP_STRRESET_PERFORMED) { | |
934 | /* if in progress, do nothing but retransmit */ | |
935 | if (result == SCTP_STRRESET_IN_PROGRESS) | |
936 | return NULL; | |
937 | else if (result == SCTP_STRRESET_DENIED) | |
938 | flags = SCTP_STREAM_RESET_DENIED; | |
939 | else | |
940 | flags = SCTP_STREAM_RESET_FAILED; | |
941 | } | |
942 | ||
943 | if (req->type == SCTP_PARAM_RESET_OUT_REQUEST) { | |
944 | struct sctp_strreset_outreq *outreq; | |
1da4fc97 | 945 | __be16 *str_p; |
11ae76e6 XL |
946 | |
947 | outreq = (struct sctp_strreset_outreq *)req; | |
edb12f2d | 948 | str_p = outreq->list_of_streams; |
3aa623da XL |
949 | nums = (ntohs(outreq->param_hdr.length) - sizeof(*outreq)) / |
950 | sizeof(__u16); | |
11ae76e6 XL |
951 | |
952 | if (result == SCTP_STRRESET_PERFORMED) { | |
05364ca0 | 953 | struct sctp_stream_out *sout; |
11ae76e6 | 954 | if (nums) { |
107e2425 | 955 | for (i = 0; i < nums; i++) { |
05364ca0 KK |
956 | sout = SCTP_SO(stream, ntohs(str_p[i])); |
957 | sout->mid = 0; | |
958 | sout->mid_uo = 0; | |
107e2425 | 959 | } |
11ae76e6 | 960 | } else { |
107e2425 | 961 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
962 | sout = SCTP_SO(stream, i); |
963 | sout->mid = 0; | |
964 | sout->mid_uo = 0; | |
107e2425 | 965 | } |
11ae76e6 | 966 | } |
11ae76e6 XL |
967 | } |
968 | ||
2e6dc4d9 XL |
969 | flags |= SCTP_STREAM_RESET_OUTGOING_SSN; |
970 | ||
11ae76e6 | 971 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 972 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
11ae76e6 XL |
973 | |
974 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, | |
975 | nums, str_p, GFP_ATOMIC); | |
976 | } else if (req->type == SCTP_PARAM_RESET_IN_REQUEST) { | |
977 | struct sctp_strreset_inreq *inreq; | |
1da4fc97 | 978 | __be16 *str_p; |
11ae76e6 XL |
979 | |
980 | /* if the result is performed, it's impossible for inreq */ | |
981 | if (result == SCTP_STRRESET_PERFORMED) | |
982 | return NULL; | |
983 | ||
984 | inreq = (struct sctp_strreset_inreq *)req; | |
edb12f2d | 985 | str_p = inreq->list_of_streams; |
3aa623da XL |
986 | nums = (ntohs(inreq->param_hdr.length) - sizeof(*inreq)) / |
987 | sizeof(__u16); | |
11ae76e6 | 988 | |
2e6dc4d9 XL |
989 | flags |= SCTP_STREAM_RESET_INCOMING_SSN; |
990 | ||
11ae76e6 XL |
991 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, |
992 | nums, str_p, GFP_ATOMIC); | |
993 | } else if (req->type == SCTP_PARAM_RESET_TSN_REQUEST) { | |
994 | struct sctp_strreset_resptsn *resptsn; | |
995 | __u32 stsn, rtsn; | |
996 | ||
997 | /* check for resptsn, as sctp_verify_reconf didn't do it*/ | |
998 | if (ntohs(param.p->length) != sizeof(*resptsn)) | |
999 | return NULL; | |
1000 | ||
1001 | resptsn = (struct sctp_strreset_resptsn *)resp; | |
1002 | stsn = ntohl(resptsn->senders_next_tsn); | |
1003 | rtsn = ntohl(resptsn->receivers_next_tsn); | |
1004 | ||
1005 | if (result == SCTP_STRRESET_PERFORMED) { | |
1006 | __u32 mtsn = sctp_tsnmap_get_max_tsn_seen( | |
1007 | &asoc->peer.tsn_map); | |
159f2a74 | 1008 | LIST_HEAD(temp); |
11ae76e6 | 1009 | |
47b20a88 | 1010 | asoc->stream.si->report_ftsn(&asoc->ulpq, mtsn); |
11ae76e6 XL |
1011 | |
1012 | sctp_tsnmap_init(&asoc->peer.tsn_map, | |
1013 | SCTP_TSN_MAP_INITIAL, | |
1014 | stsn, GFP_ATOMIC); | |
1015 | ||
159f2a74 XL |
1016 | /* Clean up sacked and abandoned queues only. As the |
1017 | * out_chunk_list may not be empty, splice it to temp, | |
1018 | * then get it back after sctp_outq_free is done. | |
1019 | */ | |
1020 | list_splice_init(&asoc->outqueue.out_chunk_list, &temp); | |
11ae76e6 | 1021 | sctp_outq_free(&asoc->outqueue); |
159f2a74 | 1022 | list_splice_init(&temp, &asoc->outqueue.out_chunk_list); |
11ae76e6 XL |
1023 | |
1024 | asoc->next_tsn = rtsn; | |
1025 | asoc->ctsn_ack_point = asoc->next_tsn - 1; | |
1026 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
1027 | ||
107e2425 | 1028 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
1029 | SCTP_SO(stream, i)->mid = 0; |
1030 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 1031 | } |
11ae76e6 | 1032 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 1033 | SCTP_SI(stream, i)->mid = 0; |
11ae76e6 XL |
1034 | } |
1035 | ||
1036 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 1037 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
11ae76e6 XL |
1038 | |
1039 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, flags, | |
1040 | stsn, rtsn, GFP_ATOMIC); | |
1041 | } else if (req->type == SCTP_PARAM_RESET_ADD_OUT_STREAMS) { | |
1042 | struct sctp_strreset_addstrm *addstrm; | |
1043 | __u16 number; | |
1044 | ||
1045 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1046 | nums = ntohs(addstrm->number_of_streams); | |
1047 | number = stream->outcnt - nums; | |
1048 | ||
3ecdda3e | 1049 | if (result == SCTP_STRRESET_PERFORMED) { |
11ae76e6 | 1050 | for (i = number; i < stream->outcnt; i++) |
05364ca0 | 1051 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
3ecdda3e XL |
1052 | } else { |
1053 | sctp_stream_shrink_out(stream, number); | |
11ae76e6 | 1054 | stream->outcnt = number; |
3ecdda3e | 1055 | } |
11ae76e6 XL |
1056 | |
1057 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1058 | 0, nums, GFP_ATOMIC); | |
1059 | } else if (req->type == SCTP_PARAM_RESET_ADD_IN_STREAMS) { | |
1060 | struct sctp_strreset_addstrm *addstrm; | |
1061 | ||
1062 | /* if the result is performed, it's impossible for addstrm in | |
1063 | * request. | |
1064 | */ | |
1065 | if (result == SCTP_STRRESET_PERFORMED) | |
1066 | return NULL; | |
1067 | ||
1068 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1069 | nums = ntohs(addstrm->number_of_streams); | |
1070 | ||
1071 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1072 | nums, 0, GFP_ATOMIC); | |
1073 | } | |
1074 | ||
1075 | asoc->strreset_outstanding--; | |
1076 | asoc->strreset_outseq++; | |
1077 | ||
1078 | /* remove everything for this reconf request */ | |
1079 | if (!asoc->strreset_outstanding) { | |
1080 | t = asoc->strreset_chunk->transport; | |
1081 | if (del_timer(&t->reconf_timer)) | |
1082 | sctp_transport_put(t); | |
1083 | ||
1084 | sctp_chunk_put(asoc->strreset_chunk); | |
1085 | asoc->strreset_chunk = NULL; | |
1086 | } | |
1087 | ||
1088 | return NULL; | |
1089 | } |