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