Commit | Line | Data |
---|---|---|
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 | ||
25 | /* Migrates chunks from stream queues to new stream queues if needed, | |
26 | * but not across associations. Also, removes those chunks to streams | |
27 | * higher than the new max. | |
28 | */ | |
29 | static void sctp_stream_outq_migrate(struct sctp_stream *stream, | |
30 | struct sctp_stream *new, __u16 outcnt) | |
31 | { | |
32 | struct sctp_association *asoc; | |
33 | struct sctp_chunk *ch, *temp; | |
34 | struct sctp_outq *outq; | |
35 | int i; | |
36 | ||
37 | asoc = container_of(stream, struct sctp_association, stream); | |
38 | outq = &asoc->outqueue; | |
39 | ||
40 | list_for_each_entry_safe(ch, temp, &outq->out_chunk_list, list) { | |
41 | __u16 sid = sctp_chunk_stream_no(ch); | |
42 | ||
43 | if (sid < outcnt) | |
44 | continue; | |
45 | ||
46 | sctp_sched_dequeue_common(outq, ch); | |
47 | /* No need to call dequeue_done here because | |
48 | * the chunks are not scheduled by now. | |
49 | */ | |
50 | ||
51 | /* Mark as failed send. */ | |
08f46070 | 52 | sctp_chunk_fail(ch, (__force __u32)SCTP_ERROR_INV_STRM); |
5bbbbe32 MRL |
53 | if (asoc->peer.prsctp_capable && |
54 | SCTP_PR_PRIO_ENABLED(ch->sinfo.sinfo_flags)) | |
55 | asoc->sent_cnt_removable--; | |
56 | ||
57 | sctp_chunk_free(ch); | |
58 | } | |
59 | ||
60 | if (new) { | |
61 | /* Here we actually move the old ext stuff into the new | |
62 | * buffer, because we want to keep it. Then | |
63 | * sctp_stream_update will swap ->out pointers. | |
64 | */ | |
65 | for (i = 0; i < outcnt; i++) { | |
0d493b4d KK |
66 | kfree(SCTP_SO(new, i)->ext); |
67 | SCTP_SO(new, i)->ext = SCTP_SO(stream, i)->ext; | |
68 | SCTP_SO(stream, i)->ext = NULL; | |
5bbbbe32 MRL |
69 | } |
70 | } | |
71 | ||
af98c5a7 | 72 | for (i = outcnt; i < stream->outcnt; i++) { |
0d493b4d | 73 | kfree(SCTP_SO(stream, i)->ext); |
af98c5a7 XL |
74 | SCTP_SO(stream, i)->ext = NULL; |
75 | } | |
5bbbbe32 | 76 | } |
a8386317 | 77 | |
e090abd0 MRL |
78 | static int sctp_stream_alloc_out(struct sctp_stream *stream, __u16 outcnt, |
79 | gfp_t gfp) | |
80 | { | |
2075e50c | 81 | int ret; |
e090abd0 | 82 | |
2075e50c KO |
83 | if (outcnt <= stream->outcnt) |
84 | return 0; | |
cfe4bd7a | 85 | |
2075e50c KO |
86 | ret = genradix_prealloc(&stream->out, outcnt, gfp); |
87 | if (ret) | |
88 | return ret; | |
e090abd0 | 89 | |
2075e50c | 90 | stream->outcnt = outcnt; |
e090abd0 MRL |
91 | return 0; |
92 | } | |
93 | ||
1fdb8d8f MRL |
94 | static int sctp_stream_alloc_in(struct sctp_stream *stream, __u16 incnt, |
95 | gfp_t gfp) | |
96 | { | |
2075e50c | 97 | int ret; |
1fdb8d8f | 98 | |
2075e50c KO |
99 | if (incnt <= stream->incnt) |
100 | return 0; | |
1fdb8d8f | 101 | |
2075e50c KO |
102 | ret = genradix_prealloc(&stream->in, incnt, gfp); |
103 | if (ret) | |
104 | return ret; | |
1fdb8d8f | 105 | |
2075e50c | 106 | stream->incnt = incnt; |
1fdb8d8f MRL |
107 | return 0; |
108 | } | |
109 | ||
ff356414 XL |
110 | int sctp_stream_init(struct sctp_stream *stream, __u16 outcnt, __u16 incnt, |
111 | gfp_t gfp) | |
a8386317 | 112 | { |
5bbbbe32 MRL |
113 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
114 | int i, ret = 0; | |
3dbcc105 | 115 | |
1ae2eaaa MRL |
116 | gfp |= __GFP_NOWARN; |
117 | ||
3dbcc105 | 118 | /* Initial stream->out size may be very big, so free it and alloc |
1ae2eaaa | 119 | * a new one with new outcnt to save memory if needed. |
3dbcc105 | 120 | */ |
1ae2eaaa MRL |
121 | if (outcnt == stream->outcnt) |
122 | goto in; | |
123 | ||
5bbbbe32 MRL |
124 | /* Filter out chunks queued on streams that won't exist anymore */ |
125 | sched->unsched_all(stream); | |
126 | sctp_stream_outq_migrate(stream, NULL, outcnt); | |
127 | sched->sched_all(stream); | |
128 | ||
79d08951 MRL |
129 | ret = sctp_stream_alloc_out(stream, outcnt, gfp); |
130 | if (ret) | |
131 | goto out; | |
3dbcc105 XL |
132 | |
133 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 134 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
3dbcc105 | 135 | |
1ae2eaaa | 136 | in: |
0c3f6f65 | 137 | sctp_stream_interleave_init(stream); |
ff356414 | 138 | if (!incnt) |
5bbbbe32 | 139 | goto out; |
ff356414 | 140 | |
79d08951 MRL |
141 | ret = sctp_stream_alloc_in(stream, incnt, gfp); |
142 | if (ret) { | |
143 | sched->free(stream); | |
2075e50c | 144 | genradix_free(&stream->out); |
79d08951 MRL |
145 | stream->outcnt = 0; |
146 | goto out; | |
a8386317 XL |
147 | } |
148 | ||
5bbbbe32 MRL |
149 | out: |
150 | return ret; | |
a8386317 XL |
151 | } |
152 | ||
f952be79 MRL |
153 | int sctp_stream_init_ext(struct sctp_stream *stream, __u16 sid) |
154 | { | |
155 | struct sctp_stream_out_ext *soute; | |
4d141581 | 156 | int ret; |
f952be79 MRL |
157 | |
158 | soute = kzalloc(sizeof(*soute), GFP_KERNEL); | |
159 | if (!soute) | |
160 | return -ENOMEM; | |
05364ca0 | 161 | SCTP_SO(stream, sid)->ext = soute; |
f952be79 | 162 | |
4d141581 MRL |
163 | ret = sctp_sched_init_sid(stream, sid, GFP_KERNEL); |
164 | if (ret) { | |
165 | kfree(SCTP_SO(stream, sid)->ext); | |
166 | SCTP_SO(stream, sid)->ext = NULL; | |
167 | } | |
168 | ||
169 | return ret; | |
f952be79 MRL |
170 | } |
171 | ||
a8386317 XL |
172 | void sctp_stream_free(struct sctp_stream *stream) |
173 | { | |
5bbbbe32 | 174 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
f952be79 MRL |
175 | int i; |
176 | ||
5bbbbe32 | 177 | sched->free(stream); |
f952be79 | 178 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 179 | kfree(SCTP_SO(stream, i)->ext); |
2075e50c KO |
180 | genradix_free(&stream->out); |
181 | genradix_free(&stream->in); | |
a8386317 XL |
182 | } |
183 | ||
184 | void sctp_stream_clear(struct sctp_stream *stream) | |
185 | { | |
186 | int i; | |
187 | ||
107e2425 | 188 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
189 | SCTP_SO(stream, i)->mid = 0; |
190 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 191 | } |
a8386317 XL |
192 | |
193 | for (i = 0; i < stream->incnt; i++) | |
05364ca0 | 194 | SCTP_SI(stream, i)->mid = 0; |
a8386317 | 195 | } |
7f9d68ac | 196 | |
cee360ab XL |
197 | void sctp_stream_update(struct sctp_stream *stream, struct sctp_stream *new) |
198 | { | |
5bbbbe32 MRL |
199 | struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream); |
200 | ||
201 | sched->unsched_all(stream); | |
202 | sctp_stream_outq_migrate(stream, new, new->outcnt); | |
cee360ab XL |
203 | sctp_stream_free(stream); |
204 | ||
205 | stream->out = new->out; | |
206 | stream->in = new->in; | |
207 | stream->outcnt = new->outcnt; | |
208 | stream->incnt = new->incnt; | |
209 | ||
5bbbbe32 MRL |
210 | sched->sched_all(stream); |
211 | ||
2075e50c KO |
212 | new->out.tree.root = NULL; |
213 | new->in.tree.root = NULL; | |
6a9a27d5 XL |
214 | new->outcnt = 0; |
215 | new->incnt = 0; | |
cee360ab XL |
216 | } |
217 | ||
7f9d68ac XL |
218 | static int sctp_send_reconf(struct sctp_association *asoc, |
219 | struct sctp_chunk *chunk) | |
220 | { | |
221 | struct net *net = sock_net(asoc->base.sk); | |
222 | int retval = 0; | |
223 | ||
224 | retval = sctp_primitive_RECONF(net, asoc, chunk); | |
225 | if (retval) | |
226 | sctp_chunk_free(chunk); | |
227 | ||
228 | return retval; | |
229 | } | |
230 | ||
d570a59c XL |
231 | static bool sctp_stream_outq_is_empty(struct sctp_stream *stream, |
232 | __u16 str_nums, __be16 *str_list) | |
233 | { | |
234 | struct sctp_association *asoc; | |
235 | __u16 i; | |
236 | ||
237 | asoc = container_of(stream, struct sctp_association, stream); | |
238 | if (!asoc->outqueue.out_qlen) | |
239 | return true; | |
240 | ||
241 | if (!str_nums) | |
242 | return false; | |
243 | ||
244 | for (i = 0; i < str_nums; i++) { | |
245 | __u16 sid = ntohs(str_list[i]); | |
246 | ||
05364ca0 KK |
247 | if (SCTP_SO(stream, sid)->ext && |
248 | !list_empty(&SCTP_SO(stream, sid)->ext->outq)) | |
d570a59c XL |
249 | return false; |
250 | } | |
251 | ||
252 | return true; | |
253 | } | |
254 | ||
7f9d68ac XL |
255 | int sctp_send_reset_streams(struct sctp_association *asoc, |
256 | struct sctp_reset_streams *params) | |
257 | { | |
cee360ab | 258 | struct sctp_stream *stream = &asoc->stream; |
7f9d68ac XL |
259 | __u16 i, str_nums, *str_list; |
260 | struct sctp_chunk *chunk; | |
261 | int retval = -EINVAL; | |
1da4fc97 | 262 | __be16 *nstr_list; |
7f9d68ac XL |
263 | bool out, in; |
264 | ||
265 | if (!asoc->peer.reconf_capable || | |
266 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) { | |
267 | retval = -ENOPROTOOPT; | |
268 | goto out; | |
269 | } | |
270 | ||
271 | if (asoc->strreset_outstanding) { | |
272 | retval = -EINPROGRESS; | |
273 | goto out; | |
274 | } | |
275 | ||
276 | out = params->srs_flags & SCTP_STREAM_RESET_OUTGOING; | |
277 | in = params->srs_flags & SCTP_STREAM_RESET_INCOMING; | |
278 | if (!out && !in) | |
279 | goto out; | |
280 | ||
281 | str_nums = params->srs_number_streams; | |
282 | str_list = params->srs_stream_list; | |
423852f8 XL |
283 | if (str_nums) { |
284 | int param_len = 0; | |
285 | ||
286 | if (out) { | |
287 | for (i = 0; i < str_nums; i++) | |
288 | if (str_list[i] >= stream->outcnt) | |
289 | goto out; | |
290 | ||
291 | param_len = str_nums * sizeof(__u16) + | |
292 | sizeof(struct sctp_strreset_outreq); | |
293 | } | |
294 | ||
295 | if (in) { | |
296 | for (i = 0; i < str_nums; i++) | |
297 | if (str_list[i] >= stream->incnt) | |
298 | goto out; | |
299 | ||
300 | param_len += str_nums * sizeof(__u16) + | |
301 | sizeof(struct sctp_strreset_inreq); | |
302 | } | |
303 | ||
304 | if (param_len > SCTP_MAX_CHUNK_LEN - | |
305 | sizeof(struct sctp_reconf_chunk)) | |
306 | goto out; | |
307 | } | |
7f9d68ac | 308 | |
1da4fc97 XL |
309 | nstr_list = kcalloc(str_nums, sizeof(__be16), GFP_KERNEL); |
310 | if (!nstr_list) { | |
311 | retval = -ENOMEM; | |
312 | goto out; | |
313 | } | |
314 | ||
16e1a919 | 315 | for (i = 0; i < str_nums; i++) |
1da4fc97 | 316 | nstr_list[i] = htons(str_list[i]); |
16e1a919 | 317 | |
d570a59c | 318 | if (out && !sctp_stream_outq_is_empty(stream, str_nums, nstr_list)) { |
6d5afe20 | 319 | kfree(nstr_list); |
d570a59c XL |
320 | retval = -EAGAIN; |
321 | goto out; | |
322 | } | |
323 | ||
1da4fc97 | 324 | chunk = sctp_make_strreset_req(asoc, str_nums, nstr_list, out, in); |
16e1a919 | 325 | |
1da4fc97 | 326 | kfree(nstr_list); |
16e1a919 | 327 | |
119aecba XL |
328 | if (!chunk) { |
329 | retval = -ENOMEM; | |
7f9d68ac | 330 | goto out; |
119aecba | 331 | } |
7f9d68ac XL |
332 | |
333 | if (out) { | |
334 | if (str_nums) | |
335 | for (i = 0; i < str_nums; i++) | |
05364ca0 | 336 | SCTP_SO(stream, str_list[i])->state = |
7f9d68ac XL |
337 | SCTP_STREAM_CLOSED; |
338 | else | |
339 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 340 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
7f9d68ac XL |
341 | } |
342 | ||
7f9d68ac XL |
343 | asoc->strreset_chunk = chunk; |
344 | sctp_chunk_hold(asoc->strreset_chunk); | |
345 | ||
346 | retval = sctp_send_reconf(asoc, chunk); | |
347 | if (retval) { | |
348 | sctp_chunk_put(asoc->strreset_chunk); | |
349 | asoc->strreset_chunk = NULL; | |
119aecba XL |
350 | if (!out) |
351 | goto out; | |
352 | ||
353 | if (str_nums) | |
354 | for (i = 0; i < str_nums; i++) | |
05364ca0 | 355 | SCTP_SO(stream, str_list[i])->state = |
119aecba XL |
356 | SCTP_STREAM_OPEN; |
357 | else | |
358 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 359 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
119aecba XL |
360 | |
361 | goto out; | |
7f9d68ac XL |
362 | } |
363 | ||
119aecba XL |
364 | asoc->strreset_outstanding = out + in; |
365 | ||
7f9d68ac XL |
366 | out: |
367 | return retval; | |
368 | } | |
a92ce1a4 XL |
369 | |
370 | int sctp_send_reset_assoc(struct sctp_association *asoc) | |
371 | { | |
cee360ab | 372 | struct sctp_stream *stream = &asoc->stream; |
a92ce1a4 XL |
373 | struct sctp_chunk *chunk = NULL; |
374 | int retval; | |
375 | __u16 i; | |
376 | ||
377 | if (!asoc->peer.reconf_capable || | |
378 | !(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
379 | return -ENOPROTOOPT; | |
380 | ||
381 | if (asoc->strreset_outstanding) | |
382 | return -EINPROGRESS; | |
383 | ||
5c6144a0 XL |
384 | if (!sctp_outq_is_empty(&asoc->outqueue)) |
385 | return -EAGAIN; | |
386 | ||
a92ce1a4 XL |
387 | chunk = sctp_make_strreset_tsnreq(asoc); |
388 | if (!chunk) | |
389 | return -ENOMEM; | |
390 | ||
391 | /* Block further xmit of data until this request is completed */ | |
cee360ab | 392 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 393 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
a92ce1a4 XL |
394 | |
395 | asoc->strreset_chunk = chunk; | |
396 | sctp_chunk_hold(asoc->strreset_chunk); | |
397 | ||
398 | retval = sctp_send_reconf(asoc, chunk); | |
399 | if (retval) { | |
400 | sctp_chunk_put(asoc->strreset_chunk); | |
401 | asoc->strreset_chunk = NULL; | |
402 | ||
cee360ab | 403 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 404 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
a92ce1a4 XL |
405 | |
406 | return retval; | |
407 | } | |
408 | ||
409 | asoc->strreset_outstanding = 1; | |
410 | ||
411 | return 0; | |
412 | } | |
242bd2d5 XL |
413 | |
414 | int sctp_send_add_streams(struct sctp_association *asoc, | |
415 | struct sctp_add_streams *params) | |
416 | { | |
cee360ab | 417 | struct sctp_stream *stream = &asoc->stream; |
242bd2d5 | 418 | struct sctp_chunk *chunk = NULL; |
dc82673f | 419 | int retval; |
242bd2d5 XL |
420 | __u32 outcnt, incnt; |
421 | __u16 out, in; | |
422 | ||
423 | if (!asoc->peer.reconf_capable || | |
424 | !(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) { | |
425 | retval = -ENOPROTOOPT; | |
426 | goto out; | |
427 | } | |
428 | ||
429 | if (asoc->strreset_outstanding) { | |
430 | retval = -EINPROGRESS; | |
431 | goto out; | |
432 | } | |
433 | ||
434 | out = params->sas_outstrms; | |
435 | in = params->sas_instrms; | |
436 | outcnt = stream->outcnt + out; | |
437 | incnt = stream->incnt + in; | |
438 | if (outcnt > SCTP_MAX_STREAM || incnt > SCTP_MAX_STREAM || | |
439 | (!out && !in)) { | |
440 | retval = -EINVAL; | |
441 | goto out; | |
442 | } | |
443 | ||
444 | if (out) { | |
e090abd0 MRL |
445 | retval = sctp_stream_alloc_out(stream, outcnt, GFP_KERNEL); |
446 | if (retval) | |
242bd2d5 | 447 | goto out; |
242bd2d5 XL |
448 | } |
449 | ||
242bd2d5 | 450 | chunk = sctp_make_strreset_addstrm(asoc, out, in); |
dc82673f WY |
451 | if (!chunk) { |
452 | retval = -ENOMEM; | |
242bd2d5 | 453 | goto out; |
dc82673f | 454 | } |
242bd2d5 XL |
455 | |
456 | asoc->strreset_chunk = chunk; | |
457 | sctp_chunk_hold(asoc->strreset_chunk); | |
458 | ||
459 | retval = sctp_send_reconf(asoc, chunk); | |
460 | if (retval) { | |
461 | sctp_chunk_put(asoc->strreset_chunk); | |
462 | asoc->strreset_chunk = NULL; | |
463 | goto out; | |
464 | } | |
465 | ||
242bd2d5 XL |
466 | asoc->strreset_outstanding = !!out + !!in; |
467 | ||
468 | out: | |
469 | return retval; | |
470 | } | |
81054476 | 471 | |
3c918704 | 472 | static struct sctp_paramhdr *sctp_chunk_lookup_strreset_param( |
1da4fc97 | 473 | struct sctp_association *asoc, __be32 resp_seq, |
50a41591 | 474 | __be16 type) |
81054476 XL |
475 | { |
476 | struct sctp_chunk *chunk = asoc->strreset_chunk; | |
477 | struct sctp_reconf_chunk *hdr; | |
478 | union sctp_params param; | |
479 | ||
50a41591 | 480 | if (!chunk) |
81054476 XL |
481 | return NULL; |
482 | ||
483 | hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr; | |
484 | sctp_walk_params(param, hdr, params) { | |
485 | /* sctp_strreset_tsnreq is actually the basic structure | |
486 | * of all stream reconf params, so it's safe to use it | |
487 | * to access request_seq. | |
488 | */ | |
489 | struct sctp_strreset_tsnreq *req = param.v; | |
490 | ||
50a41591 XL |
491 | if ((!resp_seq || req->request_seq == resp_seq) && |
492 | (!type || type == req->param_hdr.type)) | |
81054476 XL |
493 | return param.v; |
494 | } | |
495 | ||
496 | return NULL; | |
497 | } | |
498 | ||
e4dc99c7 XL |
499 | static void sctp_update_strreset_result(struct sctp_association *asoc, |
500 | __u32 result) | |
501 | { | |
502 | asoc->strreset_result[1] = asoc->strreset_result[0]; | |
503 | asoc->strreset_result[0] = result; | |
504 | } | |
505 | ||
81054476 XL |
506 | struct sctp_chunk *sctp_process_strreset_outreq( |
507 | struct sctp_association *asoc, | |
508 | union sctp_params param, | |
509 | struct sctp_ulpevent **evp) | |
510 | { | |
511 | struct sctp_strreset_outreq *outreq = param.v; | |
cee360ab | 512 | struct sctp_stream *stream = &asoc->stream; |
81054476 | 513 | __u32 result = SCTP_STRRESET_DENIED; |
1da4fc97 | 514 | __be16 *str_p = NULL; |
81054476 | 515 | __u32 request_seq; |
2e6dc4d9 | 516 | __u16 i, nums; |
81054476 XL |
517 | |
518 | request_seq = ntohl(outreq->request_seq); | |
519 | ||
520 | if (ntohl(outreq->send_reset_at_tsn) > | |
521 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map)) { | |
522 | result = SCTP_STRRESET_IN_PROGRESS; | |
e4dc99c7 | 523 | goto err; |
81054476 XL |
524 | } |
525 | ||
e4dc99c7 XL |
526 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
527 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
81054476 | 528 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
529 | goto err; |
530 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
531 | i = asoc->strreset_inseq - request_seq - 1; | |
532 | result = asoc->strreset_result[i]; | |
533 | goto err; | |
81054476 | 534 | } |
e4dc99c7 | 535 | asoc->strreset_inseq++; |
81054476 XL |
536 | |
537 | /* Check strreset_enable after inseq inc, as sender cannot tell | |
538 | * the peer doesn't enable strreset after receiving response with | |
539 | * result denied, as well as to keep consistent with bsd. | |
540 | */ | |
541 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
542 | goto out; | |
543 | ||
2e6dc4d9 XL |
544 | nums = (ntohs(param.p->length) - sizeof(*outreq)) / sizeof(__u16); |
545 | str_p = outreq->list_of_streams; | |
546 | for (i = 0; i < nums; i++) { | |
547 | if (ntohs(str_p[i]) >= stream->incnt) { | |
548 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
549 | goto out; | |
550 | } | |
551 | } | |
552 | ||
81054476 | 553 | if (asoc->strreset_chunk) { |
50a41591 XL |
554 | if (!sctp_chunk_lookup_strreset_param( |
555 | asoc, outreq->response_seq, | |
556 | SCTP_PARAM_RESET_IN_REQUEST)) { | |
81054476 XL |
557 | /* same process with outstanding isn't 0 */ |
558 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
559 | goto out; | |
560 | } | |
561 | ||
562 | asoc->strreset_outstanding--; | |
563 | asoc->strreset_outseq++; | |
564 | ||
565 | if (!asoc->strreset_outstanding) { | |
50a41591 XL |
566 | struct sctp_transport *t; |
567 | ||
81054476 XL |
568 | t = asoc->strreset_chunk->transport; |
569 | if (del_timer(&t->reconf_timer)) | |
570 | sctp_transport_put(t); | |
571 | ||
572 | sctp_chunk_put(asoc->strreset_chunk); | |
573 | asoc->strreset_chunk = NULL; | |
574 | } | |
81054476 XL |
575 | } |
576 | ||
2e6dc4d9 | 577 | if (nums) |
81054476 | 578 | for (i = 0; i < nums; i++) |
05364ca0 | 579 | SCTP_SI(stream, ntohs(str_p[i]))->mid = 0; |
2e6dc4d9 | 580 | else |
81054476 | 581 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 582 | SCTP_SI(stream, i)->mid = 0; |
81054476 XL |
583 | |
584 | result = SCTP_STRRESET_PERFORMED; | |
585 | ||
586 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, | |
2e6dc4d9 | 587 | SCTP_STREAM_RESET_INCOMING_SSN, nums, str_p, GFP_ATOMIC); |
81054476 XL |
588 | |
589 | out: | |
e4dc99c7 XL |
590 | sctp_update_strreset_result(asoc, result); |
591 | err: | |
81054476 XL |
592 | return sctp_make_strreset_resp(asoc, result, request_seq); |
593 | } | |
16e1a919 XL |
594 | |
595 | struct sctp_chunk *sctp_process_strreset_inreq( | |
596 | struct sctp_association *asoc, | |
597 | union sctp_params param, | |
598 | struct sctp_ulpevent **evp) | |
599 | { | |
600 | struct sctp_strreset_inreq *inreq = param.v; | |
cee360ab | 601 | struct sctp_stream *stream = &asoc->stream; |
16e1a919 XL |
602 | __u32 result = SCTP_STRRESET_DENIED; |
603 | struct sctp_chunk *chunk = NULL; | |
16e1a919 | 604 | __u32 request_seq; |
1da4fc97 XL |
605 | __u16 i, nums; |
606 | __be16 *str_p; | |
16e1a919 XL |
607 | |
608 | request_seq = ntohl(inreq->request_seq); | |
d0f025e6 XL |
609 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
610 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
16e1a919 | 611 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
612 | goto err; |
613 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
614 | i = asoc->strreset_inseq - request_seq - 1; | |
615 | result = asoc->strreset_result[i]; | |
616 | if (result == SCTP_STRRESET_PERFORMED) | |
617 | return NULL; | |
618 | goto err; | |
16e1a919 | 619 | } |
d0f025e6 | 620 | asoc->strreset_inseq++; |
16e1a919 XL |
621 | |
622 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) | |
623 | goto out; | |
624 | ||
625 | if (asoc->strreset_outstanding) { | |
626 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
627 | goto out; | |
628 | } | |
629 | ||
3aa623da | 630 | nums = (ntohs(param.p->length) - sizeof(*inreq)) / sizeof(__u16); |
16e1a919 XL |
631 | str_p = inreq->list_of_streams; |
632 | for (i = 0; i < nums; i++) { | |
633 | if (ntohs(str_p[i]) >= stream->outcnt) { | |
634 | result = SCTP_STRRESET_ERR_WRONG_SSN; | |
635 | goto out; | |
636 | } | |
637 | } | |
638 | ||
d570a59c XL |
639 | if (!sctp_stream_outq_is_empty(stream, nums, str_p)) { |
640 | result = SCTP_STRRESET_IN_PROGRESS; | |
641 | asoc->strreset_inseq--; | |
642 | goto err; | |
643 | } | |
644 | ||
16e1a919 XL |
645 | chunk = sctp_make_strreset_req(asoc, nums, str_p, 1, 0); |
646 | if (!chunk) | |
647 | goto out; | |
648 | ||
649 | if (nums) | |
650 | for (i = 0; i < nums; i++) | |
05364ca0 | 651 | SCTP_SO(stream, ntohs(str_p[i]))->state = |
16e1a919 XL |
652 | SCTP_STREAM_CLOSED; |
653 | else | |
654 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 655 | SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED; |
16e1a919 XL |
656 | |
657 | asoc->strreset_chunk = chunk; | |
658 | asoc->strreset_outstanding = 1; | |
659 | sctp_chunk_hold(asoc->strreset_chunk); | |
660 | ||
d0f025e6 XL |
661 | result = SCTP_STRRESET_PERFORMED; |
662 | ||
16e1a919 | 663 | out: |
d0f025e6 XL |
664 | sctp_update_strreset_result(asoc, result); |
665 | err: | |
16e1a919 XL |
666 | if (!chunk) |
667 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
668 | ||
669 | return chunk; | |
670 | } | |
692787ce XL |
671 | |
672 | struct sctp_chunk *sctp_process_strreset_tsnreq( | |
673 | struct sctp_association *asoc, | |
674 | union sctp_params param, | |
675 | struct sctp_ulpevent **evp) | |
676 | { | |
677 | __u32 init_tsn = 0, next_tsn = 0, max_tsn_seen; | |
678 | struct sctp_strreset_tsnreq *tsnreq = param.v; | |
cee360ab | 679 | struct sctp_stream *stream = &asoc->stream; |
692787ce XL |
680 | __u32 result = SCTP_STRRESET_DENIED; |
681 | __u32 request_seq; | |
682 | __u16 i; | |
683 | ||
684 | request_seq = ntohl(tsnreq->request_seq); | |
6c801387 XL |
685 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
686 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
692787ce | 687 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
6c801387 XL |
688 | goto err; |
689 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
690 | i = asoc->strreset_inseq - request_seq - 1; | |
691 | result = asoc->strreset_result[i]; | |
692 | if (result == SCTP_STRRESET_PERFORMED) { | |
52a39589 | 693 | next_tsn = asoc->ctsn_ack_point + 1; |
6c801387 XL |
694 | init_tsn = |
695 | sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + 1; | |
696 | } | |
697 | goto err; | |
692787ce | 698 | } |
5c6144a0 XL |
699 | |
700 | if (!sctp_outq_is_empty(&asoc->outqueue)) { | |
701 | result = SCTP_STRRESET_IN_PROGRESS; | |
702 | goto err; | |
703 | } | |
704 | ||
6c801387 | 705 | asoc->strreset_inseq++; |
692787ce XL |
706 | |
707 | if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ)) | |
708 | goto out; | |
709 | ||
710 | if (asoc->strreset_outstanding) { | |
711 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
712 | goto out; | |
713 | } | |
714 | ||
159f2a74 XL |
715 | /* G4: The same processing as though a FWD-TSN chunk (as defined in |
716 | * [RFC3758]) with all streams affected and a new cumulative TSN | |
717 | * ACK of the Receiver's Next TSN minus 1 were received MUST be | |
718 | * performed. | |
692787ce XL |
719 | */ |
720 | max_tsn_seen = sctp_tsnmap_get_max_tsn_seen(&asoc->peer.tsn_map); | |
47b20a88 | 721 | asoc->stream.si->report_ftsn(&asoc->ulpq, max_tsn_seen); |
692787ce XL |
722 | |
723 | /* G1: Compute an appropriate value for the Receiver's Next TSN -- the | |
724 | * TSN that the peer should use to send the next DATA chunk. The | |
725 | * value SHOULD be the smallest TSN not acknowledged by the | |
726 | * receiver of the request plus 2^31. | |
727 | */ | |
728 | init_tsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + (1 << 31); | |
729 | sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_INITIAL, | |
730 | init_tsn, GFP_ATOMIC); | |
731 | ||
159f2a74 XL |
732 | /* G3: The same processing as though a SACK chunk with no gap report |
733 | * and a cumulative TSN ACK of the Sender's Next TSN minus 1 were | |
734 | * received MUST be performed. | |
692787ce XL |
735 | */ |
736 | sctp_outq_free(&asoc->outqueue); | |
737 | ||
738 | /* G2: Compute an appropriate value for the local endpoint's next TSN, | |
739 | * i.e., the next TSN assigned by the receiver of the SSN/TSN reset | |
740 | * chunk. The value SHOULD be the highest TSN sent by the receiver | |
741 | * of the request plus 1. | |
742 | */ | |
743 | next_tsn = asoc->next_tsn; | |
744 | asoc->ctsn_ack_point = next_tsn - 1; | |
745 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
746 | ||
747 | /* G5: The next expected and outgoing SSNs MUST be reset to 0 for all | |
748 | * incoming and outgoing streams. | |
749 | */ | |
107e2425 | 750 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
751 | SCTP_SO(stream, i)->mid = 0; |
752 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 753 | } |
692787ce | 754 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 755 | SCTP_SI(stream, i)->mid = 0; |
692787ce XL |
756 | |
757 | result = SCTP_STRRESET_PERFORMED; | |
758 | ||
759 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, 0, init_tsn, | |
760 | next_tsn, GFP_ATOMIC); | |
761 | ||
762 | out: | |
6c801387 XL |
763 | sctp_update_strreset_result(asoc, result); |
764 | err: | |
692787ce XL |
765 | return sctp_make_strreset_tsnresp(asoc, result, request_seq, |
766 | next_tsn, init_tsn); | |
767 | } | |
50a41591 XL |
768 | |
769 | struct sctp_chunk *sctp_process_strreset_addstrm_out( | |
770 | struct sctp_association *asoc, | |
771 | union sctp_params param, | |
772 | struct sctp_ulpevent **evp) | |
773 | { | |
774 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 775 | struct sctp_stream *stream = &asoc->stream; |
50a41591 | 776 | __u32 result = SCTP_STRRESET_DENIED; |
50a41591 | 777 | __u32 request_seq, incnt; |
e4dc99c7 | 778 | __u16 in, i; |
50a41591 XL |
779 | |
780 | request_seq = ntohl(addstrm->request_seq); | |
e4dc99c7 XL |
781 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
782 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
50a41591 | 783 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
e4dc99c7 XL |
784 | goto err; |
785 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
786 | i = asoc->strreset_inseq - request_seq - 1; | |
787 | result = asoc->strreset_result[i]; | |
788 | goto err; | |
50a41591 | 789 | } |
e4dc99c7 | 790 | asoc->strreset_inseq++; |
50a41591 XL |
791 | |
792 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
793 | goto out; | |
794 | ||
8220c870 XL |
795 | in = ntohs(addstrm->number_of_streams); |
796 | incnt = stream->incnt + in; | |
797 | if (!in || incnt > SCTP_MAX_STREAM) | |
798 | goto out; | |
799 | ||
800 | if (sctp_stream_alloc_in(stream, incnt, GFP_ATOMIC)) | |
801 | goto out; | |
802 | ||
50a41591 XL |
803 | if (asoc->strreset_chunk) { |
804 | if (!sctp_chunk_lookup_strreset_param( | |
805 | asoc, 0, SCTP_PARAM_RESET_ADD_IN_STREAMS)) { | |
806 | /* same process with outstanding isn't 0 */ | |
807 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
808 | goto out; | |
809 | } | |
810 | ||
811 | asoc->strreset_outstanding--; | |
812 | asoc->strreset_outseq++; | |
813 | ||
814 | if (!asoc->strreset_outstanding) { | |
815 | struct sctp_transport *t; | |
816 | ||
817 | t = asoc->strreset_chunk->transport; | |
818 | if (del_timer(&t->reconf_timer)) | |
819 | sctp_transport_put(t); | |
820 | ||
821 | sctp_chunk_put(asoc->strreset_chunk); | |
822 | asoc->strreset_chunk = NULL; | |
823 | } | |
824 | } | |
825 | ||
50a41591 XL |
826 | stream->incnt = incnt; |
827 | ||
828 | result = SCTP_STRRESET_PERFORMED; | |
829 | ||
830 | *evp = sctp_ulpevent_make_stream_change_event(asoc, | |
831 | 0, ntohs(addstrm->number_of_streams), 0, GFP_ATOMIC); | |
832 | ||
833 | out: | |
e4dc99c7 XL |
834 | sctp_update_strreset_result(asoc, result); |
835 | err: | |
50a41591 XL |
836 | return sctp_make_strreset_resp(asoc, result, request_seq); |
837 | } | |
c5c4ebb3 XL |
838 | |
839 | struct sctp_chunk *sctp_process_strreset_addstrm_in( | |
840 | struct sctp_association *asoc, | |
841 | union sctp_params param, | |
842 | struct sctp_ulpevent **evp) | |
843 | { | |
844 | struct sctp_strreset_addstrm *addstrm = param.v; | |
cee360ab | 845 | struct sctp_stream *stream = &asoc->stream; |
c5c4ebb3 | 846 | __u32 result = SCTP_STRRESET_DENIED; |
c5c4ebb3 XL |
847 | struct sctp_chunk *chunk = NULL; |
848 | __u32 request_seq, outcnt; | |
d0f025e6 | 849 | __u16 out, i; |
e090abd0 | 850 | int ret; |
c5c4ebb3 XL |
851 | |
852 | request_seq = ntohl(addstrm->request_seq); | |
d0f025e6 XL |
853 | if (TSN_lt(asoc->strreset_inseq, request_seq) || |
854 | TSN_lt(request_seq, asoc->strreset_inseq - 2)) { | |
c5c4ebb3 | 855 | result = SCTP_STRRESET_ERR_BAD_SEQNO; |
d0f025e6 XL |
856 | goto err; |
857 | } else if (TSN_lt(request_seq, asoc->strreset_inseq)) { | |
858 | i = asoc->strreset_inseq - request_seq - 1; | |
859 | result = asoc->strreset_result[i]; | |
860 | if (result == SCTP_STRRESET_PERFORMED) | |
861 | return NULL; | |
862 | goto err; | |
c5c4ebb3 | 863 | } |
d0f025e6 | 864 | asoc->strreset_inseq++; |
c5c4ebb3 XL |
865 | |
866 | if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ)) | |
867 | goto out; | |
868 | ||
869 | if (asoc->strreset_outstanding) { | |
870 | result = SCTP_STRRESET_ERR_IN_PROGRESS; | |
871 | goto out; | |
872 | } | |
873 | ||
874 | out = ntohs(addstrm->number_of_streams); | |
875 | outcnt = stream->outcnt + out; | |
876 | if (!out || outcnt > SCTP_MAX_STREAM) | |
877 | goto out; | |
878 | ||
e090abd0 MRL |
879 | ret = sctp_stream_alloc_out(stream, outcnt, GFP_ATOMIC); |
880 | if (ret) | |
c5c4ebb3 XL |
881 | goto out; |
882 | ||
c5c4ebb3 XL |
883 | chunk = sctp_make_strreset_addstrm(asoc, out, 0); |
884 | if (!chunk) | |
885 | goto out; | |
886 | ||
887 | asoc->strreset_chunk = chunk; | |
888 | asoc->strreset_outstanding = 1; | |
889 | sctp_chunk_hold(asoc->strreset_chunk); | |
890 | ||
891 | stream->outcnt = outcnt; | |
892 | ||
d0f025e6 XL |
893 | result = SCTP_STRRESET_PERFORMED; |
894 | ||
c5c4ebb3 | 895 | out: |
d0f025e6 XL |
896 | sctp_update_strreset_result(asoc, result); |
897 | err: | |
c5c4ebb3 XL |
898 | if (!chunk) |
899 | chunk = sctp_make_strreset_resp(asoc, result, request_seq); | |
900 | ||
901 | return chunk; | |
902 | } | |
11ae76e6 XL |
903 | |
904 | struct sctp_chunk *sctp_process_strreset_resp( | |
905 | struct sctp_association *asoc, | |
906 | union sctp_params param, | |
907 | struct sctp_ulpevent **evp) | |
908 | { | |
cee360ab | 909 | struct sctp_stream *stream = &asoc->stream; |
11ae76e6 | 910 | struct sctp_strreset_resp *resp = param.v; |
11ae76e6 XL |
911 | struct sctp_transport *t; |
912 | __u16 i, nums, flags = 0; | |
3c918704 | 913 | struct sctp_paramhdr *req; |
11ae76e6 XL |
914 | __u32 result; |
915 | ||
916 | req = sctp_chunk_lookup_strreset_param(asoc, resp->response_seq, 0); | |
917 | if (!req) | |
918 | return NULL; | |
919 | ||
920 | result = ntohl(resp->result); | |
921 | if (result != SCTP_STRRESET_PERFORMED) { | |
922 | /* if in progress, do nothing but retransmit */ | |
923 | if (result == SCTP_STRRESET_IN_PROGRESS) | |
924 | return NULL; | |
925 | else if (result == SCTP_STRRESET_DENIED) | |
926 | flags = SCTP_STREAM_RESET_DENIED; | |
927 | else | |
928 | flags = SCTP_STREAM_RESET_FAILED; | |
929 | } | |
930 | ||
931 | if (req->type == SCTP_PARAM_RESET_OUT_REQUEST) { | |
932 | struct sctp_strreset_outreq *outreq; | |
1da4fc97 | 933 | __be16 *str_p; |
11ae76e6 XL |
934 | |
935 | outreq = (struct sctp_strreset_outreq *)req; | |
edb12f2d | 936 | str_p = outreq->list_of_streams; |
3aa623da XL |
937 | nums = (ntohs(outreq->param_hdr.length) - sizeof(*outreq)) / |
938 | sizeof(__u16); | |
11ae76e6 XL |
939 | |
940 | if (result == SCTP_STRRESET_PERFORMED) { | |
05364ca0 | 941 | struct sctp_stream_out *sout; |
11ae76e6 | 942 | if (nums) { |
107e2425 | 943 | for (i = 0; i < nums; i++) { |
05364ca0 KK |
944 | sout = SCTP_SO(stream, ntohs(str_p[i])); |
945 | sout->mid = 0; | |
946 | sout->mid_uo = 0; | |
107e2425 | 947 | } |
11ae76e6 | 948 | } else { |
107e2425 | 949 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
950 | sout = SCTP_SO(stream, i); |
951 | sout->mid = 0; | |
952 | sout->mid_uo = 0; | |
107e2425 | 953 | } |
11ae76e6 | 954 | } |
11ae76e6 XL |
955 | } |
956 | ||
2e6dc4d9 XL |
957 | flags |= SCTP_STREAM_RESET_OUTGOING_SSN; |
958 | ||
11ae76e6 | 959 | for (i = 0; i < stream->outcnt; i++) |
05364ca0 | 960 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
11ae76e6 XL |
961 | |
962 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, | |
963 | nums, str_p, GFP_ATOMIC); | |
964 | } else if (req->type == SCTP_PARAM_RESET_IN_REQUEST) { | |
965 | struct sctp_strreset_inreq *inreq; | |
1da4fc97 | 966 | __be16 *str_p; |
11ae76e6 XL |
967 | |
968 | /* if the result is performed, it's impossible for inreq */ | |
969 | if (result == SCTP_STRRESET_PERFORMED) | |
970 | return NULL; | |
971 | ||
972 | inreq = (struct sctp_strreset_inreq *)req; | |
edb12f2d | 973 | str_p = inreq->list_of_streams; |
3aa623da XL |
974 | nums = (ntohs(inreq->param_hdr.length) - sizeof(*inreq)) / |
975 | sizeof(__u16); | |
11ae76e6 | 976 | |
2e6dc4d9 XL |
977 | flags |= SCTP_STREAM_RESET_INCOMING_SSN; |
978 | ||
11ae76e6 XL |
979 | *evp = sctp_ulpevent_make_stream_reset_event(asoc, flags, |
980 | nums, str_p, GFP_ATOMIC); | |
981 | } else if (req->type == SCTP_PARAM_RESET_TSN_REQUEST) { | |
982 | struct sctp_strreset_resptsn *resptsn; | |
983 | __u32 stsn, rtsn; | |
984 | ||
985 | /* check for resptsn, as sctp_verify_reconf didn't do it*/ | |
986 | if (ntohs(param.p->length) != sizeof(*resptsn)) | |
987 | return NULL; | |
988 | ||
989 | resptsn = (struct sctp_strreset_resptsn *)resp; | |
990 | stsn = ntohl(resptsn->senders_next_tsn); | |
991 | rtsn = ntohl(resptsn->receivers_next_tsn); | |
992 | ||
993 | if (result == SCTP_STRRESET_PERFORMED) { | |
994 | __u32 mtsn = sctp_tsnmap_get_max_tsn_seen( | |
995 | &asoc->peer.tsn_map); | |
159f2a74 | 996 | LIST_HEAD(temp); |
11ae76e6 | 997 | |
47b20a88 | 998 | asoc->stream.si->report_ftsn(&asoc->ulpq, mtsn); |
11ae76e6 XL |
999 | |
1000 | sctp_tsnmap_init(&asoc->peer.tsn_map, | |
1001 | SCTP_TSN_MAP_INITIAL, | |
1002 | stsn, GFP_ATOMIC); | |
1003 | ||
159f2a74 XL |
1004 | /* Clean up sacked and abandoned queues only. As the |
1005 | * out_chunk_list may not be empty, splice it to temp, | |
1006 | * then get it back after sctp_outq_free is done. | |
1007 | */ | |
1008 | list_splice_init(&asoc->outqueue.out_chunk_list, &temp); | |
11ae76e6 | 1009 | sctp_outq_free(&asoc->outqueue); |
159f2a74 | 1010 | list_splice_init(&temp, &asoc->outqueue.out_chunk_list); |
11ae76e6 XL |
1011 | |
1012 | asoc->next_tsn = rtsn; | |
1013 | asoc->ctsn_ack_point = asoc->next_tsn - 1; | |
1014 | asoc->adv_peer_ack_point = asoc->ctsn_ack_point; | |
1015 | ||
107e2425 | 1016 | for (i = 0; i < stream->outcnt; i++) { |
05364ca0 KK |
1017 | SCTP_SO(stream, i)->mid = 0; |
1018 | SCTP_SO(stream, i)->mid_uo = 0; | |
107e2425 | 1019 | } |
11ae76e6 | 1020 | for (i = 0; i < stream->incnt; i++) |
05364ca0 | 1021 | SCTP_SI(stream, i)->mid = 0; |
11ae76e6 XL |
1022 | } |
1023 | ||
1024 | for (i = 0; i < stream->outcnt; i++) | |
05364ca0 | 1025 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
11ae76e6 XL |
1026 | |
1027 | *evp = sctp_ulpevent_make_assoc_reset_event(asoc, flags, | |
1028 | stsn, rtsn, GFP_ATOMIC); | |
1029 | } else if (req->type == SCTP_PARAM_RESET_ADD_OUT_STREAMS) { | |
1030 | struct sctp_strreset_addstrm *addstrm; | |
1031 | __u16 number; | |
1032 | ||
1033 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1034 | nums = ntohs(addstrm->number_of_streams); | |
1035 | number = stream->outcnt - nums; | |
1036 | ||
1037 | if (result == SCTP_STRRESET_PERFORMED) | |
1038 | for (i = number; i < stream->outcnt; i++) | |
05364ca0 | 1039 | SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; |
11ae76e6 XL |
1040 | else |
1041 | stream->outcnt = number; | |
1042 | ||
1043 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1044 | 0, nums, GFP_ATOMIC); | |
1045 | } else if (req->type == SCTP_PARAM_RESET_ADD_IN_STREAMS) { | |
1046 | struct sctp_strreset_addstrm *addstrm; | |
1047 | ||
1048 | /* if the result is performed, it's impossible for addstrm in | |
1049 | * request. | |
1050 | */ | |
1051 | if (result == SCTP_STRRESET_PERFORMED) | |
1052 | return NULL; | |
1053 | ||
1054 | addstrm = (struct sctp_strreset_addstrm *)req; | |
1055 | nums = ntohs(addstrm->number_of_streams); | |
1056 | ||
1057 | *evp = sctp_ulpevent_make_stream_change_event(asoc, flags, | |
1058 | nums, 0, GFP_ATOMIC); | |
1059 | } | |
1060 | ||
1061 | asoc->strreset_outstanding--; | |
1062 | asoc->strreset_outseq++; | |
1063 | ||
1064 | /* remove everything for this reconf request */ | |
1065 | if (!asoc->strreset_outstanding) { | |
1066 | t = asoc->strreset_chunk->transport; | |
1067 | if (del_timer(&t->reconf_timer)) | |
1068 | sctp_transport_put(t); | |
1069 | ||
1070 | sctp_chunk_put(asoc->strreset_chunk); | |
1071 | asoc->strreset_chunk = NULL; | |
1072 | } | |
1073 | ||
1074 | return NULL; | |
1075 | } |