Commit | Line | Data |
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0857dd3b JH |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | ||
4 | Copyright (C) 2014 Intel Corporation | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License version 2 as | |
8 | published by the Free Software Foundation; | |
9 | ||
10 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
11 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
12 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
13 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
14 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
15 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
18 | ||
19 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
20 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
21 | SOFTWARE IS DISCLAIMED. | |
22 | */ | |
23 | ||
174cd4b1 IM |
24 | #include <linux/sched/signal.h> |
25 | ||
0857dd3b JH |
26 | #include <net/bluetooth/bluetooth.h> |
27 | #include <net/bluetooth/hci_core.h> | |
f2252570 | 28 | #include <net/bluetooth/mgmt.h> |
0857dd3b JH |
29 | |
30 | #include "smp.h" | |
31 | #include "hci_request.h" | |
32 | ||
be91cd05 JH |
33 | #define HCI_REQ_DONE 0 |
34 | #define HCI_REQ_PEND 1 | |
35 | #define HCI_REQ_CANCELED 2 | |
36 | ||
0857dd3b JH |
37 | void hci_req_init(struct hci_request *req, struct hci_dev *hdev) |
38 | { | |
39 | skb_queue_head_init(&req->cmd_q); | |
40 | req->hdev = hdev; | |
41 | req->err = 0; | |
42 | } | |
43 | ||
f17d858e JK |
44 | void hci_req_purge(struct hci_request *req) |
45 | { | |
46 | skb_queue_purge(&req->cmd_q); | |
47 | } | |
48 | ||
e6214487 JH |
49 | static int req_run(struct hci_request *req, hci_req_complete_t complete, |
50 | hci_req_complete_skb_t complete_skb) | |
0857dd3b JH |
51 | { |
52 | struct hci_dev *hdev = req->hdev; | |
53 | struct sk_buff *skb; | |
54 | unsigned long flags; | |
55 | ||
56 | BT_DBG("length %u", skb_queue_len(&req->cmd_q)); | |
57 | ||
58 | /* If an error occurred during request building, remove all HCI | |
59 | * commands queued on the HCI request queue. | |
60 | */ | |
61 | if (req->err) { | |
62 | skb_queue_purge(&req->cmd_q); | |
63 | return req->err; | |
64 | } | |
65 | ||
66 | /* Do not allow empty requests */ | |
67 | if (skb_queue_empty(&req->cmd_q)) | |
68 | return -ENODATA; | |
69 | ||
70 | skb = skb_peek_tail(&req->cmd_q); | |
44d27137 JH |
71 | if (complete) { |
72 | bt_cb(skb)->hci.req_complete = complete; | |
73 | } else if (complete_skb) { | |
74 | bt_cb(skb)->hci.req_complete_skb = complete_skb; | |
75 | bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB; | |
76 | } | |
0857dd3b JH |
77 | |
78 | spin_lock_irqsave(&hdev->cmd_q.lock, flags); | |
79 | skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q); | |
80 | spin_unlock_irqrestore(&hdev->cmd_q.lock, flags); | |
81 | ||
82 | queue_work(hdev->workqueue, &hdev->cmd_work); | |
83 | ||
84 | return 0; | |
85 | } | |
86 | ||
e6214487 JH |
87 | int hci_req_run(struct hci_request *req, hci_req_complete_t complete) |
88 | { | |
89 | return req_run(req, complete, NULL); | |
90 | } | |
91 | ||
92 | int hci_req_run_skb(struct hci_request *req, hci_req_complete_skb_t complete) | |
93 | { | |
94 | return req_run(req, NULL, complete); | |
95 | } | |
96 | ||
be91cd05 JH |
97 | static void hci_req_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode, |
98 | struct sk_buff *skb) | |
99 | { | |
100 | BT_DBG("%s result 0x%2.2x", hdev->name, result); | |
101 | ||
102 | if (hdev->req_status == HCI_REQ_PEND) { | |
103 | hdev->req_result = result; | |
104 | hdev->req_status = HCI_REQ_DONE; | |
105 | if (skb) | |
106 | hdev->req_skb = skb_get(skb); | |
107 | wake_up_interruptible(&hdev->req_wait_q); | |
108 | } | |
109 | } | |
110 | ||
b504430c | 111 | void hci_req_sync_cancel(struct hci_dev *hdev, int err) |
be91cd05 JH |
112 | { |
113 | BT_DBG("%s err 0x%2.2x", hdev->name, err); | |
114 | ||
115 | if (hdev->req_status == HCI_REQ_PEND) { | |
116 | hdev->req_result = err; | |
117 | hdev->req_status = HCI_REQ_CANCELED; | |
118 | wake_up_interruptible(&hdev->req_wait_q); | |
119 | } | |
120 | } | |
121 | ||
122 | struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen, | |
123 | const void *param, u8 event, u32 timeout) | |
124 | { | |
125 | DECLARE_WAITQUEUE(wait, current); | |
126 | struct hci_request req; | |
127 | struct sk_buff *skb; | |
128 | int err = 0; | |
129 | ||
130 | BT_DBG("%s", hdev->name); | |
131 | ||
132 | hci_req_init(&req, hdev); | |
133 | ||
134 | hci_req_add_ev(&req, opcode, plen, param, event); | |
135 | ||
136 | hdev->req_status = HCI_REQ_PEND; | |
137 | ||
138 | add_wait_queue(&hdev->req_wait_q, &wait); | |
139 | set_current_state(TASK_INTERRUPTIBLE); | |
140 | ||
141 | err = hci_req_run_skb(&req, hci_req_sync_complete); | |
142 | if (err < 0) { | |
143 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
144 | set_current_state(TASK_RUNNING); | |
145 | return ERR_PTR(err); | |
146 | } | |
147 | ||
148 | schedule_timeout(timeout); | |
149 | ||
150 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
151 | ||
152 | if (signal_pending(current)) | |
153 | return ERR_PTR(-EINTR); | |
154 | ||
155 | switch (hdev->req_status) { | |
156 | case HCI_REQ_DONE: | |
157 | err = -bt_to_errno(hdev->req_result); | |
158 | break; | |
159 | ||
160 | case HCI_REQ_CANCELED: | |
161 | err = -hdev->req_result; | |
162 | break; | |
163 | ||
164 | default: | |
165 | err = -ETIMEDOUT; | |
166 | break; | |
167 | } | |
168 | ||
169 | hdev->req_status = hdev->req_result = 0; | |
170 | skb = hdev->req_skb; | |
171 | hdev->req_skb = NULL; | |
172 | ||
173 | BT_DBG("%s end: err %d", hdev->name, err); | |
174 | ||
175 | if (err < 0) { | |
176 | kfree_skb(skb); | |
177 | return ERR_PTR(err); | |
178 | } | |
179 | ||
180 | if (!skb) | |
181 | return ERR_PTR(-ENODATA); | |
182 | ||
183 | return skb; | |
184 | } | |
185 | EXPORT_SYMBOL(__hci_cmd_sync_ev); | |
186 | ||
187 | struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen, | |
188 | const void *param, u32 timeout) | |
189 | { | |
190 | return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout); | |
191 | } | |
192 | EXPORT_SYMBOL(__hci_cmd_sync); | |
193 | ||
194 | /* Execute request and wait for completion. */ | |
a1d01db1 JH |
195 | int __hci_req_sync(struct hci_dev *hdev, int (*func)(struct hci_request *req, |
196 | unsigned long opt), | |
4ebeee2d | 197 | unsigned long opt, u32 timeout, u8 *hci_status) |
be91cd05 JH |
198 | { |
199 | struct hci_request req; | |
200 | DECLARE_WAITQUEUE(wait, current); | |
201 | int err = 0; | |
202 | ||
203 | BT_DBG("%s start", hdev->name); | |
204 | ||
205 | hci_req_init(&req, hdev); | |
206 | ||
207 | hdev->req_status = HCI_REQ_PEND; | |
208 | ||
a1d01db1 JH |
209 | err = func(&req, opt); |
210 | if (err) { | |
211 | if (hci_status) | |
212 | *hci_status = HCI_ERROR_UNSPECIFIED; | |
213 | return err; | |
214 | } | |
be91cd05 JH |
215 | |
216 | add_wait_queue(&hdev->req_wait_q, &wait); | |
217 | set_current_state(TASK_INTERRUPTIBLE); | |
218 | ||
219 | err = hci_req_run_skb(&req, hci_req_sync_complete); | |
220 | if (err < 0) { | |
221 | hdev->req_status = 0; | |
222 | ||
223 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
224 | set_current_state(TASK_RUNNING); | |
225 | ||
226 | /* ENODATA means the HCI request command queue is empty. | |
227 | * This can happen when a request with conditionals doesn't | |
228 | * trigger any commands to be sent. This is normal behavior | |
229 | * and should not trigger an error return. | |
230 | */ | |
568f44f6 JH |
231 | if (err == -ENODATA) { |
232 | if (hci_status) | |
233 | *hci_status = 0; | |
be91cd05 | 234 | return 0; |
568f44f6 JH |
235 | } |
236 | ||
237 | if (hci_status) | |
238 | *hci_status = HCI_ERROR_UNSPECIFIED; | |
be91cd05 JH |
239 | |
240 | return err; | |
241 | } | |
242 | ||
243 | schedule_timeout(timeout); | |
244 | ||
245 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
246 | ||
247 | if (signal_pending(current)) | |
248 | return -EINTR; | |
249 | ||
250 | switch (hdev->req_status) { | |
251 | case HCI_REQ_DONE: | |
252 | err = -bt_to_errno(hdev->req_result); | |
4ebeee2d JH |
253 | if (hci_status) |
254 | *hci_status = hdev->req_result; | |
be91cd05 JH |
255 | break; |
256 | ||
257 | case HCI_REQ_CANCELED: | |
258 | err = -hdev->req_result; | |
4ebeee2d JH |
259 | if (hci_status) |
260 | *hci_status = HCI_ERROR_UNSPECIFIED; | |
be91cd05 JH |
261 | break; |
262 | ||
263 | default: | |
264 | err = -ETIMEDOUT; | |
4ebeee2d JH |
265 | if (hci_status) |
266 | *hci_status = HCI_ERROR_UNSPECIFIED; | |
be91cd05 JH |
267 | break; |
268 | } | |
269 | ||
9afee949 FD |
270 | kfree_skb(hdev->req_skb); |
271 | hdev->req_skb = NULL; | |
be91cd05 JH |
272 | hdev->req_status = hdev->req_result = 0; |
273 | ||
274 | BT_DBG("%s end: err %d", hdev->name, err); | |
275 | ||
276 | return err; | |
277 | } | |
278 | ||
a1d01db1 JH |
279 | int hci_req_sync(struct hci_dev *hdev, int (*req)(struct hci_request *req, |
280 | unsigned long opt), | |
4ebeee2d | 281 | unsigned long opt, u32 timeout, u8 *hci_status) |
be91cd05 JH |
282 | { |
283 | int ret; | |
284 | ||
285 | if (!test_bit(HCI_UP, &hdev->flags)) | |
286 | return -ENETDOWN; | |
287 | ||
288 | /* Serialize all requests */ | |
b504430c | 289 | hci_req_sync_lock(hdev); |
4ebeee2d | 290 | ret = __hci_req_sync(hdev, req, opt, timeout, hci_status); |
b504430c | 291 | hci_req_sync_unlock(hdev); |
be91cd05 JH |
292 | |
293 | return ret; | |
294 | } | |
295 | ||
0857dd3b JH |
296 | struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode, u32 plen, |
297 | const void *param) | |
298 | { | |
299 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
300 | struct hci_command_hdr *hdr; | |
301 | struct sk_buff *skb; | |
302 | ||
303 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
304 | if (!skb) | |
305 | return NULL; | |
306 | ||
4df864c1 | 307 | hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE); |
0857dd3b JH |
308 | hdr->opcode = cpu_to_le16(opcode); |
309 | hdr->plen = plen; | |
310 | ||
311 | if (plen) | |
59ae1d12 | 312 | skb_put_data(skb, param, plen); |
0857dd3b JH |
313 | |
314 | BT_DBG("skb len %d", skb->len); | |
315 | ||
d79f34e3 MH |
316 | hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; |
317 | hci_skb_opcode(skb) = opcode; | |
0857dd3b JH |
318 | |
319 | return skb; | |
320 | } | |
321 | ||
322 | /* Queue a command to an asynchronous HCI request */ | |
323 | void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen, | |
324 | const void *param, u8 event) | |
325 | { | |
326 | struct hci_dev *hdev = req->hdev; | |
327 | struct sk_buff *skb; | |
328 | ||
329 | BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen); | |
330 | ||
331 | /* If an error occurred during request building, there is no point in | |
332 | * queueing the HCI command. We can simply return. | |
333 | */ | |
334 | if (req->err) | |
335 | return; | |
336 | ||
337 | skb = hci_prepare_cmd(hdev, opcode, plen, param); | |
338 | if (!skb) { | |
2064ee33 MH |
339 | bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)", |
340 | opcode); | |
0857dd3b JH |
341 | req->err = -ENOMEM; |
342 | return; | |
343 | } | |
344 | ||
345 | if (skb_queue_empty(&req->cmd_q)) | |
44d27137 | 346 | bt_cb(skb)->hci.req_flags |= HCI_REQ_START; |
0857dd3b | 347 | |
242c0ebd | 348 | bt_cb(skb)->hci.req_event = event; |
0857dd3b JH |
349 | |
350 | skb_queue_tail(&req->cmd_q, skb); | |
351 | } | |
352 | ||
353 | void hci_req_add(struct hci_request *req, u16 opcode, u32 plen, | |
354 | const void *param) | |
355 | { | |
356 | hci_req_add_ev(req, opcode, plen, param, 0); | |
357 | } | |
358 | ||
bf943cbf JH |
359 | void __hci_req_write_fast_connectable(struct hci_request *req, bool enable) |
360 | { | |
361 | struct hci_dev *hdev = req->hdev; | |
362 | struct hci_cp_write_page_scan_activity acp; | |
363 | u8 type; | |
364 | ||
365 | if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) | |
366 | return; | |
367 | ||
368 | if (hdev->hci_ver < BLUETOOTH_VER_1_2) | |
369 | return; | |
370 | ||
371 | if (enable) { | |
372 | type = PAGE_SCAN_TYPE_INTERLACED; | |
373 | ||
374 | /* 160 msec page scan interval */ | |
375 | acp.interval = cpu_to_le16(0x0100); | |
376 | } else { | |
377 | type = PAGE_SCAN_TYPE_STANDARD; /* default */ | |
378 | ||
379 | /* default 1.28 sec page scan */ | |
380 | acp.interval = cpu_to_le16(0x0800); | |
381 | } | |
382 | ||
383 | acp.window = cpu_to_le16(0x0012); | |
384 | ||
385 | if (__cpu_to_le16(hdev->page_scan_interval) != acp.interval || | |
386 | __cpu_to_le16(hdev->page_scan_window) != acp.window) | |
387 | hci_req_add(req, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY, | |
388 | sizeof(acp), &acp); | |
389 | ||
390 | if (hdev->page_scan_type != type) | |
391 | hci_req_add(req, HCI_OP_WRITE_PAGE_SCAN_TYPE, 1, &type); | |
392 | } | |
393 | ||
196a5e97 JH |
394 | /* This function controls the background scanning based on hdev->pend_le_conns |
395 | * list. If there are pending LE connection we start the background scanning, | |
396 | * otherwise we stop it. | |
397 | * | |
398 | * This function requires the caller holds hdev->lock. | |
399 | */ | |
400 | static void __hci_update_background_scan(struct hci_request *req) | |
401 | { | |
402 | struct hci_dev *hdev = req->hdev; | |
403 | ||
404 | if (!test_bit(HCI_UP, &hdev->flags) || | |
405 | test_bit(HCI_INIT, &hdev->flags) || | |
406 | hci_dev_test_flag(hdev, HCI_SETUP) || | |
407 | hci_dev_test_flag(hdev, HCI_CONFIG) || | |
408 | hci_dev_test_flag(hdev, HCI_AUTO_OFF) || | |
409 | hci_dev_test_flag(hdev, HCI_UNREGISTER)) | |
410 | return; | |
411 | ||
412 | /* No point in doing scanning if LE support hasn't been enabled */ | |
413 | if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) | |
414 | return; | |
415 | ||
416 | /* If discovery is active don't interfere with it */ | |
417 | if (hdev->discovery.state != DISCOVERY_STOPPED) | |
418 | return; | |
419 | ||
420 | /* Reset RSSI and UUID filters when starting background scanning | |
421 | * since these filters are meant for service discovery only. | |
422 | * | |
423 | * The Start Discovery and Start Service Discovery operations | |
424 | * ensure to set proper values for RSSI threshold and UUID | |
425 | * filter list. So it is safe to just reset them here. | |
426 | */ | |
427 | hci_discovery_filter_clear(hdev); | |
428 | ||
429 | if (list_empty(&hdev->pend_le_conns) && | |
430 | list_empty(&hdev->pend_le_reports)) { | |
431 | /* If there is no pending LE connections or devices | |
432 | * to be scanned for, we should stop the background | |
433 | * scanning. | |
434 | */ | |
435 | ||
436 | /* If controller is not scanning we are done. */ | |
437 | if (!hci_dev_test_flag(hdev, HCI_LE_SCAN)) | |
438 | return; | |
439 | ||
440 | hci_req_add_le_scan_disable(req); | |
441 | ||
442 | BT_DBG("%s stopping background scanning", hdev->name); | |
443 | } else { | |
444 | /* If there is at least one pending LE connection, we should | |
445 | * keep the background scan running. | |
446 | */ | |
447 | ||
448 | /* If controller is connecting, we should not start scanning | |
449 | * since some controllers are not able to scan and connect at | |
450 | * the same time. | |
451 | */ | |
452 | if (hci_lookup_le_connect(hdev)) | |
453 | return; | |
454 | ||
455 | /* If controller is currently scanning, we stop it to ensure we | |
456 | * don't miss any advertising (due to duplicates filter). | |
457 | */ | |
458 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) | |
459 | hci_req_add_le_scan_disable(req); | |
460 | ||
461 | hci_req_add_le_passive_scan(req); | |
462 | ||
463 | BT_DBG("%s starting background scanning", hdev->name); | |
464 | } | |
465 | } | |
466 | ||
00cf5040 JH |
467 | void __hci_req_update_name(struct hci_request *req) |
468 | { | |
469 | struct hci_dev *hdev = req->hdev; | |
470 | struct hci_cp_write_local_name cp; | |
471 | ||
472 | memcpy(cp.name, hdev->dev_name, sizeof(cp.name)); | |
473 | ||
474 | hci_req_add(req, HCI_OP_WRITE_LOCAL_NAME, sizeof(cp), &cp); | |
475 | } | |
476 | ||
b1a8917c JH |
477 | #define PNP_INFO_SVCLASS_ID 0x1200 |
478 | ||
479 | static u8 *create_uuid16_list(struct hci_dev *hdev, u8 *data, ptrdiff_t len) | |
480 | { | |
481 | u8 *ptr = data, *uuids_start = NULL; | |
482 | struct bt_uuid *uuid; | |
483 | ||
484 | if (len < 4) | |
485 | return ptr; | |
486 | ||
487 | list_for_each_entry(uuid, &hdev->uuids, list) { | |
488 | u16 uuid16; | |
489 | ||
490 | if (uuid->size != 16) | |
491 | continue; | |
492 | ||
493 | uuid16 = get_unaligned_le16(&uuid->uuid[12]); | |
494 | if (uuid16 < 0x1100) | |
495 | continue; | |
496 | ||
497 | if (uuid16 == PNP_INFO_SVCLASS_ID) | |
498 | continue; | |
499 | ||
500 | if (!uuids_start) { | |
501 | uuids_start = ptr; | |
502 | uuids_start[0] = 1; | |
503 | uuids_start[1] = EIR_UUID16_ALL; | |
504 | ptr += 2; | |
505 | } | |
506 | ||
507 | /* Stop if not enough space to put next UUID */ | |
508 | if ((ptr - data) + sizeof(u16) > len) { | |
509 | uuids_start[1] = EIR_UUID16_SOME; | |
510 | break; | |
511 | } | |
512 | ||
513 | *ptr++ = (uuid16 & 0x00ff); | |
514 | *ptr++ = (uuid16 & 0xff00) >> 8; | |
515 | uuids_start[0] += sizeof(uuid16); | |
516 | } | |
517 | ||
518 | return ptr; | |
519 | } | |
520 | ||
521 | static u8 *create_uuid32_list(struct hci_dev *hdev, u8 *data, ptrdiff_t len) | |
522 | { | |
523 | u8 *ptr = data, *uuids_start = NULL; | |
524 | struct bt_uuid *uuid; | |
525 | ||
526 | if (len < 6) | |
527 | return ptr; | |
528 | ||
529 | list_for_each_entry(uuid, &hdev->uuids, list) { | |
530 | if (uuid->size != 32) | |
531 | continue; | |
532 | ||
533 | if (!uuids_start) { | |
534 | uuids_start = ptr; | |
535 | uuids_start[0] = 1; | |
536 | uuids_start[1] = EIR_UUID32_ALL; | |
537 | ptr += 2; | |
538 | } | |
539 | ||
540 | /* Stop if not enough space to put next UUID */ | |
541 | if ((ptr - data) + sizeof(u32) > len) { | |
542 | uuids_start[1] = EIR_UUID32_SOME; | |
543 | break; | |
544 | } | |
545 | ||
546 | memcpy(ptr, &uuid->uuid[12], sizeof(u32)); | |
547 | ptr += sizeof(u32); | |
548 | uuids_start[0] += sizeof(u32); | |
549 | } | |
550 | ||
551 | return ptr; | |
552 | } | |
553 | ||
554 | static u8 *create_uuid128_list(struct hci_dev *hdev, u8 *data, ptrdiff_t len) | |
555 | { | |
556 | u8 *ptr = data, *uuids_start = NULL; | |
557 | struct bt_uuid *uuid; | |
558 | ||
559 | if (len < 18) | |
560 | return ptr; | |
561 | ||
562 | list_for_each_entry(uuid, &hdev->uuids, list) { | |
563 | if (uuid->size != 128) | |
564 | continue; | |
565 | ||
566 | if (!uuids_start) { | |
567 | uuids_start = ptr; | |
568 | uuids_start[0] = 1; | |
569 | uuids_start[1] = EIR_UUID128_ALL; | |
570 | ptr += 2; | |
571 | } | |
572 | ||
573 | /* Stop if not enough space to put next UUID */ | |
574 | if ((ptr - data) + 16 > len) { | |
575 | uuids_start[1] = EIR_UUID128_SOME; | |
576 | break; | |
577 | } | |
578 | ||
579 | memcpy(ptr, uuid->uuid, 16); | |
580 | ptr += 16; | |
581 | uuids_start[0] += 16; | |
582 | } | |
583 | ||
584 | return ptr; | |
585 | } | |
586 | ||
587 | static void create_eir(struct hci_dev *hdev, u8 *data) | |
588 | { | |
589 | u8 *ptr = data; | |
590 | size_t name_len; | |
591 | ||
592 | name_len = strlen(hdev->dev_name); | |
593 | ||
594 | if (name_len > 0) { | |
595 | /* EIR Data type */ | |
596 | if (name_len > 48) { | |
597 | name_len = 48; | |
598 | ptr[1] = EIR_NAME_SHORT; | |
599 | } else | |
600 | ptr[1] = EIR_NAME_COMPLETE; | |
601 | ||
602 | /* EIR Data length */ | |
603 | ptr[0] = name_len + 1; | |
604 | ||
605 | memcpy(ptr + 2, hdev->dev_name, name_len); | |
606 | ||
607 | ptr += (name_len + 2); | |
608 | } | |
609 | ||
610 | if (hdev->inq_tx_power != HCI_TX_POWER_INVALID) { | |
611 | ptr[0] = 2; | |
612 | ptr[1] = EIR_TX_POWER; | |
613 | ptr[2] = (u8) hdev->inq_tx_power; | |
614 | ||
615 | ptr += 3; | |
616 | } | |
617 | ||
618 | if (hdev->devid_source > 0) { | |
619 | ptr[0] = 9; | |
620 | ptr[1] = EIR_DEVICE_ID; | |
621 | ||
622 | put_unaligned_le16(hdev->devid_source, ptr + 2); | |
623 | put_unaligned_le16(hdev->devid_vendor, ptr + 4); | |
624 | put_unaligned_le16(hdev->devid_product, ptr + 6); | |
625 | put_unaligned_le16(hdev->devid_version, ptr + 8); | |
626 | ||
627 | ptr += 10; | |
628 | } | |
629 | ||
630 | ptr = create_uuid16_list(hdev, ptr, HCI_MAX_EIR_LENGTH - (ptr - data)); | |
631 | ptr = create_uuid32_list(hdev, ptr, HCI_MAX_EIR_LENGTH - (ptr - data)); | |
632 | ptr = create_uuid128_list(hdev, ptr, HCI_MAX_EIR_LENGTH - (ptr - data)); | |
633 | } | |
634 | ||
635 | void __hci_req_update_eir(struct hci_request *req) | |
636 | { | |
637 | struct hci_dev *hdev = req->hdev; | |
638 | struct hci_cp_write_eir cp; | |
639 | ||
640 | if (!hdev_is_powered(hdev)) | |
641 | return; | |
642 | ||
643 | if (!lmp_ext_inq_capable(hdev)) | |
644 | return; | |
645 | ||
646 | if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) | |
647 | return; | |
648 | ||
649 | if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE)) | |
650 | return; | |
651 | ||
652 | memset(&cp, 0, sizeof(cp)); | |
653 | ||
654 | create_eir(hdev, cp.data); | |
655 | ||
656 | if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0) | |
657 | return; | |
658 | ||
659 | memcpy(hdev->eir, cp.data, sizeof(cp.data)); | |
660 | ||
661 | hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp); | |
662 | } | |
663 | ||
0857dd3b JH |
664 | void hci_req_add_le_scan_disable(struct hci_request *req) |
665 | { | |
666 | struct hci_cp_le_set_scan_enable cp; | |
667 | ||
668 | memset(&cp, 0, sizeof(cp)); | |
669 | cp.enable = LE_SCAN_DISABLE; | |
670 | hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp); | |
671 | } | |
672 | ||
673 | static void add_to_white_list(struct hci_request *req, | |
674 | struct hci_conn_params *params) | |
675 | { | |
676 | struct hci_cp_le_add_to_white_list cp; | |
677 | ||
678 | cp.bdaddr_type = params->addr_type; | |
679 | bacpy(&cp.bdaddr, ¶ms->addr); | |
680 | ||
681 | hci_req_add(req, HCI_OP_LE_ADD_TO_WHITE_LIST, sizeof(cp), &cp); | |
682 | } | |
683 | ||
684 | static u8 update_white_list(struct hci_request *req) | |
685 | { | |
686 | struct hci_dev *hdev = req->hdev; | |
687 | struct hci_conn_params *params; | |
688 | struct bdaddr_list *b; | |
689 | uint8_t white_list_entries = 0; | |
690 | ||
691 | /* Go through the current white list programmed into the | |
692 | * controller one by one and check if that address is still | |
693 | * in the list of pending connections or list of devices to | |
694 | * report. If not present in either list, then queue the | |
695 | * command to remove it from the controller. | |
696 | */ | |
697 | list_for_each_entry(b, &hdev->le_white_list, list) { | |
cff10ce7 JH |
698 | /* If the device is neither in pend_le_conns nor |
699 | * pend_le_reports then remove it from the whitelist. | |
700 | */ | |
701 | if (!hci_pend_le_action_lookup(&hdev->pend_le_conns, | |
702 | &b->bdaddr, b->bdaddr_type) && | |
703 | !hci_pend_le_action_lookup(&hdev->pend_le_reports, | |
704 | &b->bdaddr, b->bdaddr_type)) { | |
705 | struct hci_cp_le_del_from_white_list cp; | |
706 | ||
707 | cp.bdaddr_type = b->bdaddr_type; | |
708 | bacpy(&cp.bdaddr, &b->bdaddr); | |
0857dd3b | 709 | |
cff10ce7 JH |
710 | hci_req_add(req, HCI_OP_LE_DEL_FROM_WHITE_LIST, |
711 | sizeof(cp), &cp); | |
0857dd3b JH |
712 | continue; |
713 | } | |
714 | ||
cff10ce7 JH |
715 | if (hci_find_irk_by_addr(hdev, &b->bdaddr, b->bdaddr_type)) { |
716 | /* White list can not be used with RPAs */ | |
717 | return 0x00; | |
718 | } | |
0857dd3b | 719 | |
cff10ce7 | 720 | white_list_entries++; |
0857dd3b JH |
721 | } |
722 | ||
723 | /* Since all no longer valid white list entries have been | |
724 | * removed, walk through the list of pending connections | |
725 | * and ensure that any new device gets programmed into | |
726 | * the controller. | |
727 | * | |
728 | * If the list of the devices is larger than the list of | |
729 | * available white list entries in the controller, then | |
730 | * just abort and return filer policy value to not use the | |
731 | * white list. | |
732 | */ | |
733 | list_for_each_entry(params, &hdev->pend_le_conns, action) { | |
734 | if (hci_bdaddr_list_lookup(&hdev->le_white_list, | |
735 | ¶ms->addr, params->addr_type)) | |
736 | continue; | |
737 | ||
738 | if (white_list_entries >= hdev->le_white_list_size) { | |
739 | /* Select filter policy to accept all advertising */ | |
740 | return 0x00; | |
741 | } | |
742 | ||
743 | if (hci_find_irk_by_addr(hdev, ¶ms->addr, | |
744 | params->addr_type)) { | |
745 | /* White list can not be used with RPAs */ | |
746 | return 0x00; | |
747 | } | |
748 | ||
749 | white_list_entries++; | |
750 | add_to_white_list(req, params); | |
751 | } | |
752 | ||
753 | /* After adding all new pending connections, walk through | |
754 | * the list of pending reports and also add these to the | |
755 | * white list if there is still space. | |
756 | */ | |
757 | list_for_each_entry(params, &hdev->pend_le_reports, action) { | |
758 | if (hci_bdaddr_list_lookup(&hdev->le_white_list, | |
759 | ¶ms->addr, params->addr_type)) | |
760 | continue; | |
761 | ||
762 | if (white_list_entries >= hdev->le_white_list_size) { | |
763 | /* Select filter policy to accept all advertising */ | |
764 | return 0x00; | |
765 | } | |
766 | ||
767 | if (hci_find_irk_by_addr(hdev, ¶ms->addr, | |
768 | params->addr_type)) { | |
769 | /* White list can not be used with RPAs */ | |
770 | return 0x00; | |
771 | } | |
772 | ||
773 | white_list_entries++; | |
774 | add_to_white_list(req, params); | |
775 | } | |
776 | ||
777 | /* Select filter policy to use white list */ | |
778 | return 0x01; | |
779 | } | |
780 | ||
82a37ade JH |
781 | static bool scan_use_rpa(struct hci_dev *hdev) |
782 | { | |
783 | return hci_dev_test_flag(hdev, HCI_PRIVACY); | |
784 | } | |
785 | ||
0857dd3b JH |
786 | void hci_req_add_le_passive_scan(struct hci_request *req) |
787 | { | |
788 | struct hci_cp_le_set_scan_param param_cp; | |
789 | struct hci_cp_le_set_scan_enable enable_cp; | |
790 | struct hci_dev *hdev = req->hdev; | |
791 | u8 own_addr_type; | |
792 | u8 filter_policy; | |
793 | ||
794 | /* Set require_privacy to false since no SCAN_REQ are send | |
795 | * during passive scanning. Not using an non-resolvable address | |
796 | * here is important so that peer devices using direct | |
797 | * advertising with our address will be correctly reported | |
798 | * by the controller. | |
799 | */ | |
82a37ade JH |
800 | if (hci_update_random_address(req, false, scan_use_rpa(hdev), |
801 | &own_addr_type)) | |
0857dd3b JH |
802 | return; |
803 | ||
804 | /* Adding or removing entries from the white list must | |
805 | * happen before enabling scanning. The controller does | |
806 | * not allow white list modification while scanning. | |
807 | */ | |
808 | filter_policy = update_white_list(req); | |
809 | ||
810 | /* When the controller is using random resolvable addresses and | |
811 | * with that having LE privacy enabled, then controllers with | |
812 | * Extended Scanner Filter Policies support can now enable support | |
813 | * for handling directed advertising. | |
814 | * | |
815 | * So instead of using filter polices 0x00 (no whitelist) | |
816 | * and 0x01 (whitelist enabled) use the new filter policies | |
817 | * 0x02 (no whitelist) and 0x03 (whitelist enabled). | |
818 | */ | |
d7a5a11d | 819 | if (hci_dev_test_flag(hdev, HCI_PRIVACY) && |
0857dd3b JH |
820 | (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)) |
821 | filter_policy |= 0x02; | |
822 | ||
823 | memset(¶m_cp, 0, sizeof(param_cp)); | |
824 | param_cp.type = LE_SCAN_PASSIVE; | |
825 | param_cp.interval = cpu_to_le16(hdev->le_scan_interval); | |
826 | param_cp.window = cpu_to_le16(hdev->le_scan_window); | |
827 | param_cp.own_address_type = own_addr_type; | |
828 | param_cp.filter_policy = filter_policy; | |
829 | hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp), | |
830 | ¶m_cp); | |
831 | ||
832 | memset(&enable_cp, 0, sizeof(enable_cp)); | |
833 | enable_cp.enable = LE_SCAN_ENABLE; | |
834 | enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE; | |
835 | hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp), | |
836 | &enable_cp); | |
837 | } | |
838 | ||
f2252570 JH |
839 | static u8 get_cur_adv_instance_scan_rsp_len(struct hci_dev *hdev) |
840 | { | |
cab054ab | 841 | u8 instance = hdev->cur_adv_instance; |
f2252570 JH |
842 | struct adv_info *adv_instance; |
843 | ||
844 | /* Ignore instance 0 */ | |
845 | if (instance == 0x00) | |
846 | return 0; | |
847 | ||
848 | adv_instance = hci_find_adv_instance(hdev, instance); | |
849 | if (!adv_instance) | |
850 | return 0; | |
851 | ||
852 | /* TODO: Take into account the "appearance" and "local-name" flags here. | |
853 | * These are currently being ignored as they are not supported. | |
854 | */ | |
855 | return adv_instance->scan_rsp_len; | |
856 | } | |
857 | ||
858 | void __hci_req_disable_advertising(struct hci_request *req) | |
859 | { | |
860 | u8 enable = 0x00; | |
861 | ||
862 | hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable); | |
863 | } | |
864 | ||
865 | static u32 get_adv_instance_flags(struct hci_dev *hdev, u8 instance) | |
866 | { | |
867 | u32 flags; | |
868 | struct adv_info *adv_instance; | |
869 | ||
870 | if (instance == 0x00) { | |
871 | /* Instance 0 always manages the "Tx Power" and "Flags" | |
872 | * fields | |
873 | */ | |
874 | flags = MGMT_ADV_FLAG_TX_POWER | MGMT_ADV_FLAG_MANAGED_FLAGS; | |
875 | ||
876 | /* For instance 0, the HCI_ADVERTISING_CONNECTABLE setting | |
877 | * corresponds to the "connectable" instance flag. | |
878 | */ | |
879 | if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE)) | |
880 | flags |= MGMT_ADV_FLAG_CONNECTABLE; | |
881 | ||
6a19cc8c JH |
882 | if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) |
883 | flags |= MGMT_ADV_FLAG_LIMITED_DISCOV; | |
884 | else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE)) | |
d43efbd0 JH |
885 | flags |= MGMT_ADV_FLAG_DISCOV; |
886 | ||
f2252570 JH |
887 | return flags; |
888 | } | |
889 | ||
890 | adv_instance = hci_find_adv_instance(hdev, instance); | |
891 | ||
892 | /* Return 0 when we got an invalid instance identifier. */ | |
893 | if (!adv_instance) | |
894 | return 0; | |
895 | ||
896 | return adv_instance->flags; | |
897 | } | |
898 | ||
82a37ade JH |
899 | static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags) |
900 | { | |
901 | /* If privacy is not enabled don't use RPA */ | |
902 | if (!hci_dev_test_flag(hdev, HCI_PRIVACY)) | |
903 | return false; | |
904 | ||
905 | /* If basic privacy mode is enabled use RPA */ | |
906 | if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) | |
907 | return true; | |
908 | ||
909 | /* If limited privacy mode is enabled don't use RPA if we're | |
910 | * both discoverable and bondable. | |
911 | */ | |
912 | if ((flags & MGMT_ADV_FLAG_DISCOV) && | |
913 | hci_dev_test_flag(hdev, HCI_BONDABLE)) | |
914 | return false; | |
915 | ||
916 | /* We're neither bondable nor discoverable in the limited | |
917 | * privacy mode, therefore use RPA. | |
918 | */ | |
919 | return true; | |
920 | } | |
921 | ||
f2252570 JH |
922 | void __hci_req_enable_advertising(struct hci_request *req) |
923 | { | |
924 | struct hci_dev *hdev = req->hdev; | |
925 | struct hci_cp_le_set_adv_param cp; | |
926 | u8 own_addr_type, enable = 0x01; | |
927 | bool connectable; | |
f2252570 JH |
928 | u32 flags; |
929 | ||
930 | if (hci_conn_num(hdev, LE_LINK) > 0) | |
931 | return; | |
932 | ||
933 | if (hci_dev_test_flag(hdev, HCI_LE_ADV)) | |
934 | __hci_req_disable_advertising(req); | |
935 | ||
936 | /* Clear the HCI_LE_ADV bit temporarily so that the | |
937 | * hci_update_random_address knows that it's safe to go ahead | |
938 | * and write a new random address. The flag will be set back on | |
939 | * as soon as the SET_ADV_ENABLE HCI command completes. | |
940 | */ | |
941 | hci_dev_clear_flag(hdev, HCI_LE_ADV); | |
942 | ||
cab054ab | 943 | flags = get_adv_instance_flags(hdev, hdev->cur_adv_instance); |
f2252570 JH |
944 | |
945 | /* If the "connectable" instance flag was not set, then choose between | |
946 | * ADV_IND and ADV_NONCONN_IND based on the global connectable setting. | |
947 | */ | |
948 | connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) || | |
949 | mgmt_get_connectable(hdev); | |
950 | ||
951 | /* Set require_privacy to true only when non-connectable | |
952 | * advertising is used. In that case it is fine to use a | |
953 | * non-resolvable private address. | |
954 | */ | |
82a37ade JH |
955 | if (hci_update_random_address(req, !connectable, |
956 | adv_use_rpa(hdev, flags), | |
957 | &own_addr_type) < 0) | |
f2252570 JH |
958 | return; |
959 | ||
960 | memset(&cp, 0, sizeof(cp)); | |
961 | cp.min_interval = cpu_to_le16(hdev->le_adv_min_interval); | |
962 | cp.max_interval = cpu_to_le16(hdev->le_adv_max_interval); | |
963 | ||
964 | if (connectable) | |
965 | cp.type = LE_ADV_IND; | |
966 | else if (get_cur_adv_instance_scan_rsp_len(hdev)) | |
967 | cp.type = LE_ADV_SCAN_IND; | |
968 | else | |
969 | cp.type = LE_ADV_NONCONN_IND; | |
970 | ||
971 | cp.own_address_type = own_addr_type; | |
972 | cp.channel_map = hdev->le_adv_channel_map; | |
973 | ||
974 | hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp); | |
975 | ||
976 | hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable); | |
977 | } | |
978 | ||
f61851f6 | 979 | u8 append_local_name(struct hci_dev *hdev, u8 *ptr, u8 ad_len) |
f2252570 | 980 | { |
cecbf3e9 | 981 | size_t short_len; |
f61851f6 | 982 | size_t complete_len; |
f2252570 | 983 | |
f61851f6 MN |
984 | /* no space left for name (+ NULL + type + len) */ |
985 | if ((HCI_MAX_AD_LENGTH - ad_len) < HCI_MAX_SHORT_NAME_LENGTH + 3) | |
cecbf3e9 | 986 | return ad_len; |
f2252570 | 987 | |
f61851f6 MN |
988 | /* use complete name if present and fits */ |
989 | complete_len = strlen(hdev->dev_name); | |
990 | if (complete_len && complete_len <= HCI_MAX_SHORT_NAME_LENGTH) | |
1b422066 | 991 | return eir_append_data(ptr, ad_len, EIR_NAME_COMPLETE, |
f61851f6 | 992 | hdev->dev_name, complete_len + 1); |
cecbf3e9 | 993 | |
f61851f6 MN |
994 | /* use short name if present */ |
995 | short_len = strlen(hdev->short_name); | |
996 | if (short_len) | |
1b422066 | 997 | return eir_append_data(ptr, ad_len, EIR_NAME_SHORT, |
f61851f6 | 998 | hdev->short_name, short_len + 1); |
cecbf3e9 | 999 | |
f61851f6 MN |
1000 | /* use shortened full name if present, we already know that name |
1001 | * is longer then HCI_MAX_SHORT_NAME_LENGTH | |
1002 | */ | |
1003 | if (complete_len) { | |
1004 | u8 name[HCI_MAX_SHORT_NAME_LENGTH + 1]; | |
1005 | ||
1006 | memcpy(name, hdev->dev_name, HCI_MAX_SHORT_NAME_LENGTH); | |
1007 | name[HCI_MAX_SHORT_NAME_LENGTH] = '\0'; | |
1008 | ||
1009 | return eir_append_data(ptr, ad_len, EIR_NAME_SHORT, name, | |
1010 | sizeof(name)); | |
f2252570 JH |
1011 | } |
1012 | ||
1013 | return ad_len; | |
1014 | } | |
1015 | ||
1b422066 MN |
1016 | static u8 append_appearance(struct hci_dev *hdev, u8 *ptr, u8 ad_len) |
1017 | { | |
1018 | return eir_append_le16(ptr, ad_len, EIR_APPEARANCE, hdev->appearance); | |
1019 | } | |
1020 | ||
7c295c48 MN |
1021 | static u8 create_default_scan_rsp_data(struct hci_dev *hdev, u8 *ptr) |
1022 | { | |
7ddb30c7 MN |
1023 | u8 scan_rsp_len = 0; |
1024 | ||
1025 | if (hdev->appearance) { | |
1b422066 | 1026 | scan_rsp_len = append_appearance(hdev, ptr, scan_rsp_len); |
7ddb30c7 MN |
1027 | } |
1028 | ||
1b422066 | 1029 | return append_local_name(hdev, ptr, scan_rsp_len); |
7c295c48 MN |
1030 | } |
1031 | ||
f2252570 JH |
1032 | static u8 create_instance_scan_rsp_data(struct hci_dev *hdev, u8 instance, |
1033 | u8 *ptr) | |
1034 | { | |
1035 | struct adv_info *adv_instance; | |
7c295c48 MN |
1036 | u32 instance_flags; |
1037 | u8 scan_rsp_len = 0; | |
f2252570 JH |
1038 | |
1039 | adv_instance = hci_find_adv_instance(hdev, instance); | |
1040 | if (!adv_instance) | |
1041 | return 0; | |
1042 | ||
7c295c48 MN |
1043 | instance_flags = adv_instance->flags; |
1044 | ||
c4960ecf | 1045 | if ((instance_flags & MGMT_ADV_FLAG_APPEARANCE) && hdev->appearance) { |
1b422066 | 1046 | scan_rsp_len = append_appearance(hdev, ptr, scan_rsp_len); |
c4960ecf MN |
1047 | } |
1048 | ||
1b422066 | 1049 | memcpy(&ptr[scan_rsp_len], adv_instance->scan_rsp_data, |
f2252570 JH |
1050 | adv_instance->scan_rsp_len); |
1051 | ||
7c295c48 | 1052 | scan_rsp_len += adv_instance->scan_rsp_len; |
7c295c48 MN |
1053 | |
1054 | if (instance_flags & MGMT_ADV_FLAG_LOCAL_NAME) | |
1055 | scan_rsp_len = append_local_name(hdev, ptr, scan_rsp_len); | |
1056 | ||
1057 | return scan_rsp_len; | |
f2252570 JH |
1058 | } |
1059 | ||
cab054ab | 1060 | void __hci_req_update_scan_rsp_data(struct hci_request *req, u8 instance) |
f2252570 JH |
1061 | { |
1062 | struct hci_dev *hdev = req->hdev; | |
1063 | struct hci_cp_le_set_scan_rsp_data cp; | |
1064 | u8 len; | |
1065 | ||
1066 | if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) | |
1067 | return; | |
1068 | ||
1069 | memset(&cp, 0, sizeof(cp)); | |
1070 | ||
1071 | if (instance) | |
1072 | len = create_instance_scan_rsp_data(hdev, instance, cp.data); | |
1073 | else | |
1074 | len = create_default_scan_rsp_data(hdev, cp.data); | |
1075 | ||
1076 | if (hdev->scan_rsp_data_len == len && | |
1077 | !memcmp(cp.data, hdev->scan_rsp_data, len)) | |
1078 | return; | |
1079 | ||
1080 | memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data)); | |
1081 | hdev->scan_rsp_data_len = len; | |
1082 | ||
1083 | cp.length = len; | |
1084 | ||
1085 | hci_req_add(req, HCI_OP_LE_SET_SCAN_RSP_DATA, sizeof(cp), &cp); | |
1086 | } | |
1087 | ||
f2252570 JH |
1088 | static u8 create_instance_adv_data(struct hci_dev *hdev, u8 instance, u8 *ptr) |
1089 | { | |
1090 | struct adv_info *adv_instance = NULL; | |
1091 | u8 ad_len = 0, flags = 0; | |
1092 | u32 instance_flags; | |
1093 | ||
1094 | /* Return 0 when the current instance identifier is invalid. */ | |
1095 | if (instance) { | |
1096 | adv_instance = hci_find_adv_instance(hdev, instance); | |
1097 | if (!adv_instance) | |
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | instance_flags = get_adv_instance_flags(hdev, instance); | |
1102 | ||
1103 | /* The Add Advertising command allows userspace to set both the general | |
1104 | * and limited discoverable flags. | |
1105 | */ | |
1106 | if (instance_flags & MGMT_ADV_FLAG_DISCOV) | |
1107 | flags |= LE_AD_GENERAL; | |
1108 | ||
1109 | if (instance_flags & MGMT_ADV_FLAG_LIMITED_DISCOV) | |
1110 | flags |= LE_AD_LIMITED; | |
1111 | ||
f18ba58f JH |
1112 | if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) |
1113 | flags |= LE_AD_NO_BREDR; | |
1114 | ||
f2252570 JH |
1115 | if (flags || (instance_flags & MGMT_ADV_FLAG_MANAGED_FLAGS)) { |
1116 | /* If a discovery flag wasn't provided, simply use the global | |
1117 | * settings. | |
1118 | */ | |
1119 | if (!flags) | |
1120 | flags |= mgmt_get_adv_discov_flags(hdev); | |
1121 | ||
f2252570 JH |
1122 | /* If flags would still be empty, then there is no need to |
1123 | * include the "Flags" AD field". | |
1124 | */ | |
1125 | if (flags) { | |
1126 | ptr[0] = 0x02; | |
1127 | ptr[1] = EIR_FLAGS; | |
1128 | ptr[2] = flags; | |
1129 | ||
1130 | ad_len += 3; | |
1131 | ptr += 3; | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | if (adv_instance) { | |
1136 | memcpy(ptr, adv_instance->adv_data, | |
1137 | adv_instance->adv_data_len); | |
1138 | ad_len += adv_instance->adv_data_len; | |
1139 | ptr += adv_instance->adv_data_len; | |
1140 | } | |
1141 | ||
1142 | /* Provide Tx Power only if we can provide a valid value for it */ | |
1143 | if (hdev->adv_tx_power != HCI_TX_POWER_INVALID && | |
1144 | (instance_flags & MGMT_ADV_FLAG_TX_POWER)) { | |
1145 | ptr[0] = 0x02; | |
1146 | ptr[1] = EIR_TX_POWER; | |
1147 | ptr[2] = (u8)hdev->adv_tx_power; | |
1148 | ||
1149 | ad_len += 3; | |
1150 | ptr += 3; | |
1151 | } | |
1152 | ||
1153 | return ad_len; | |
1154 | } | |
1155 | ||
cab054ab | 1156 | void __hci_req_update_adv_data(struct hci_request *req, u8 instance) |
f2252570 JH |
1157 | { |
1158 | struct hci_dev *hdev = req->hdev; | |
1159 | struct hci_cp_le_set_adv_data cp; | |
1160 | u8 len; | |
1161 | ||
1162 | if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) | |
1163 | return; | |
1164 | ||
1165 | memset(&cp, 0, sizeof(cp)); | |
1166 | ||
1167 | len = create_instance_adv_data(hdev, instance, cp.data); | |
1168 | ||
1169 | /* There's nothing to do if the data hasn't changed */ | |
1170 | if (hdev->adv_data_len == len && | |
1171 | memcmp(cp.data, hdev->adv_data, len) == 0) | |
1172 | return; | |
1173 | ||
1174 | memcpy(hdev->adv_data, cp.data, sizeof(cp.data)); | |
1175 | hdev->adv_data_len = len; | |
1176 | ||
1177 | cp.length = len; | |
1178 | ||
1179 | hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp); | |
1180 | } | |
1181 | ||
cab054ab | 1182 | int hci_req_update_adv_data(struct hci_dev *hdev, u8 instance) |
f2252570 JH |
1183 | { |
1184 | struct hci_request req; | |
1185 | ||
1186 | hci_req_init(&req, hdev); | |
1187 | __hci_req_update_adv_data(&req, instance); | |
1188 | ||
1189 | return hci_req_run(&req, NULL); | |
1190 | } | |
1191 | ||
1192 | static void adv_enable_complete(struct hci_dev *hdev, u8 status, u16 opcode) | |
1193 | { | |
1194 | BT_DBG("%s status %u", hdev->name, status); | |
1195 | } | |
1196 | ||
1197 | void hci_req_reenable_advertising(struct hci_dev *hdev) | |
1198 | { | |
1199 | struct hci_request req; | |
f2252570 JH |
1200 | |
1201 | if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) && | |
17fd08ff | 1202 | list_empty(&hdev->adv_instances)) |
f2252570 JH |
1203 | return; |
1204 | ||
f2252570 JH |
1205 | hci_req_init(&req, hdev); |
1206 | ||
cab054ab JH |
1207 | if (hdev->cur_adv_instance) { |
1208 | __hci_req_schedule_adv_instance(&req, hdev->cur_adv_instance, | |
1209 | true); | |
f2252570 | 1210 | } else { |
cab054ab JH |
1211 | __hci_req_update_adv_data(&req, 0x00); |
1212 | __hci_req_update_scan_rsp_data(&req, 0x00); | |
f2252570 JH |
1213 | __hci_req_enable_advertising(&req); |
1214 | } | |
1215 | ||
1216 | hci_req_run(&req, adv_enable_complete); | |
1217 | } | |
1218 | ||
1219 | static void adv_timeout_expire(struct work_struct *work) | |
1220 | { | |
1221 | struct hci_dev *hdev = container_of(work, struct hci_dev, | |
1222 | adv_instance_expire.work); | |
1223 | ||
1224 | struct hci_request req; | |
1225 | u8 instance; | |
1226 | ||
1227 | BT_DBG("%s", hdev->name); | |
1228 | ||
1229 | hci_dev_lock(hdev); | |
1230 | ||
1231 | hdev->adv_instance_timeout = 0; | |
1232 | ||
cab054ab | 1233 | instance = hdev->cur_adv_instance; |
f2252570 JH |
1234 | if (instance == 0x00) |
1235 | goto unlock; | |
1236 | ||
1237 | hci_req_init(&req, hdev); | |
1238 | ||
37d3a1fa | 1239 | hci_req_clear_adv_instance(hdev, NULL, &req, instance, false); |
f2252570 JH |
1240 | |
1241 | if (list_empty(&hdev->adv_instances)) | |
1242 | __hci_req_disable_advertising(&req); | |
1243 | ||
550a8ca7 | 1244 | hci_req_run(&req, NULL); |
f2252570 JH |
1245 | |
1246 | unlock: | |
1247 | hci_dev_unlock(hdev); | |
1248 | } | |
1249 | ||
1250 | int __hci_req_schedule_adv_instance(struct hci_request *req, u8 instance, | |
1251 | bool force) | |
1252 | { | |
1253 | struct hci_dev *hdev = req->hdev; | |
1254 | struct adv_info *adv_instance = NULL; | |
1255 | u16 timeout; | |
1256 | ||
1257 | if (hci_dev_test_flag(hdev, HCI_ADVERTISING) || | |
17fd08ff | 1258 | list_empty(&hdev->adv_instances)) |
f2252570 JH |
1259 | return -EPERM; |
1260 | ||
1261 | if (hdev->adv_instance_timeout) | |
1262 | return -EBUSY; | |
1263 | ||
1264 | adv_instance = hci_find_adv_instance(hdev, instance); | |
1265 | if (!adv_instance) | |
1266 | return -ENOENT; | |
1267 | ||
1268 | /* A zero timeout means unlimited advertising. As long as there is | |
1269 | * only one instance, duration should be ignored. We still set a timeout | |
1270 | * in case further instances are being added later on. | |
1271 | * | |
1272 | * If the remaining lifetime of the instance is more than the duration | |
1273 | * then the timeout corresponds to the duration, otherwise it will be | |
1274 | * reduced to the remaining instance lifetime. | |
1275 | */ | |
1276 | if (adv_instance->timeout == 0 || | |
1277 | adv_instance->duration <= adv_instance->remaining_time) | |
1278 | timeout = adv_instance->duration; | |
1279 | else | |
1280 | timeout = adv_instance->remaining_time; | |
1281 | ||
1282 | /* The remaining time is being reduced unless the instance is being | |
1283 | * advertised without time limit. | |
1284 | */ | |
1285 | if (adv_instance->timeout) | |
1286 | adv_instance->remaining_time = | |
1287 | adv_instance->remaining_time - timeout; | |
1288 | ||
1289 | hdev->adv_instance_timeout = timeout; | |
1290 | queue_delayed_work(hdev->req_workqueue, | |
1291 | &hdev->adv_instance_expire, | |
1292 | msecs_to_jiffies(timeout * 1000)); | |
1293 | ||
1294 | /* If we're just re-scheduling the same instance again then do not | |
1295 | * execute any HCI commands. This happens when a single instance is | |
1296 | * being advertised. | |
1297 | */ | |
1298 | if (!force && hdev->cur_adv_instance == instance && | |
1299 | hci_dev_test_flag(hdev, HCI_LE_ADV)) | |
1300 | return 0; | |
1301 | ||
1302 | hdev->cur_adv_instance = instance; | |
cab054ab JH |
1303 | __hci_req_update_adv_data(req, instance); |
1304 | __hci_req_update_scan_rsp_data(req, instance); | |
f2252570 JH |
1305 | __hci_req_enable_advertising(req); |
1306 | ||
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | static void cancel_adv_timeout(struct hci_dev *hdev) | |
1311 | { | |
1312 | if (hdev->adv_instance_timeout) { | |
1313 | hdev->adv_instance_timeout = 0; | |
1314 | cancel_delayed_work(&hdev->adv_instance_expire); | |
1315 | } | |
1316 | } | |
1317 | ||
1318 | /* For a single instance: | |
1319 | * - force == true: The instance will be removed even when its remaining | |
1320 | * lifetime is not zero. | |
1321 | * - force == false: the instance will be deactivated but kept stored unless | |
1322 | * the remaining lifetime is zero. | |
1323 | * | |
1324 | * For instance == 0x00: | |
1325 | * - force == true: All instances will be removed regardless of their timeout | |
1326 | * setting. | |
1327 | * - force == false: Only instances that have a timeout will be removed. | |
1328 | */ | |
37d3a1fa JH |
1329 | void hci_req_clear_adv_instance(struct hci_dev *hdev, struct sock *sk, |
1330 | struct hci_request *req, u8 instance, | |
1331 | bool force) | |
f2252570 JH |
1332 | { |
1333 | struct adv_info *adv_instance, *n, *next_instance = NULL; | |
1334 | int err; | |
1335 | u8 rem_inst; | |
1336 | ||
1337 | /* Cancel any timeout concerning the removed instance(s). */ | |
1338 | if (!instance || hdev->cur_adv_instance == instance) | |
1339 | cancel_adv_timeout(hdev); | |
1340 | ||
1341 | /* Get the next instance to advertise BEFORE we remove | |
1342 | * the current one. This can be the same instance again | |
1343 | * if there is only one instance. | |
1344 | */ | |
1345 | if (instance && hdev->cur_adv_instance == instance) | |
1346 | next_instance = hci_get_next_instance(hdev, instance); | |
1347 | ||
1348 | if (instance == 0x00) { | |
1349 | list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, | |
1350 | list) { | |
1351 | if (!(force || adv_instance->timeout)) | |
1352 | continue; | |
1353 | ||
1354 | rem_inst = adv_instance->instance; | |
1355 | err = hci_remove_adv_instance(hdev, rem_inst); | |
1356 | if (!err) | |
37d3a1fa | 1357 | mgmt_advertising_removed(sk, hdev, rem_inst); |
f2252570 | 1358 | } |
f2252570 JH |
1359 | } else { |
1360 | adv_instance = hci_find_adv_instance(hdev, instance); | |
1361 | ||
1362 | if (force || (adv_instance && adv_instance->timeout && | |
1363 | !adv_instance->remaining_time)) { | |
1364 | /* Don't advertise a removed instance. */ | |
1365 | if (next_instance && | |
1366 | next_instance->instance == instance) | |
1367 | next_instance = NULL; | |
1368 | ||
1369 | err = hci_remove_adv_instance(hdev, instance); | |
1370 | if (!err) | |
37d3a1fa | 1371 | mgmt_advertising_removed(sk, hdev, instance); |
f2252570 JH |
1372 | } |
1373 | } | |
1374 | ||
f2252570 JH |
1375 | if (!req || !hdev_is_powered(hdev) || |
1376 | hci_dev_test_flag(hdev, HCI_ADVERTISING)) | |
1377 | return; | |
1378 | ||
1379 | if (next_instance) | |
1380 | __hci_req_schedule_adv_instance(req, next_instance->instance, | |
1381 | false); | |
1382 | } | |
1383 | ||
0857dd3b JH |
1384 | static void set_random_addr(struct hci_request *req, bdaddr_t *rpa) |
1385 | { | |
1386 | struct hci_dev *hdev = req->hdev; | |
1387 | ||
1388 | /* If we're advertising or initiating an LE connection we can't | |
1389 | * go ahead and change the random address at this time. This is | |
1390 | * because the eventual initiator address used for the | |
1391 | * subsequently created connection will be undefined (some | |
1392 | * controllers use the new address and others the one we had | |
1393 | * when the operation started). | |
1394 | * | |
1395 | * In this kind of scenario skip the update and let the random | |
1396 | * address be updated at the next cycle. | |
1397 | */ | |
d7a5a11d | 1398 | if (hci_dev_test_flag(hdev, HCI_LE_ADV) || |
e7d9ab73 | 1399 | hci_lookup_le_connect(hdev)) { |
0857dd3b | 1400 | BT_DBG("Deferring random address update"); |
a1536da2 | 1401 | hci_dev_set_flag(hdev, HCI_RPA_EXPIRED); |
0857dd3b JH |
1402 | return; |
1403 | } | |
1404 | ||
1405 | hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6, rpa); | |
1406 | } | |
1407 | ||
1408 | int hci_update_random_address(struct hci_request *req, bool require_privacy, | |
82a37ade | 1409 | bool use_rpa, u8 *own_addr_type) |
0857dd3b JH |
1410 | { |
1411 | struct hci_dev *hdev = req->hdev; | |
1412 | int err; | |
1413 | ||
1414 | /* If privacy is enabled use a resolvable private address. If | |
1415 | * current RPA has expired or there is something else than | |
1416 | * the current RPA in use, then generate a new one. | |
1417 | */ | |
82a37ade | 1418 | if (use_rpa) { |
0857dd3b JH |
1419 | int to; |
1420 | ||
1421 | *own_addr_type = ADDR_LE_DEV_RANDOM; | |
1422 | ||
a69d8927 | 1423 | if (!hci_dev_test_and_clear_flag(hdev, HCI_RPA_EXPIRED) && |
0857dd3b JH |
1424 | !bacmp(&hdev->random_addr, &hdev->rpa)) |
1425 | return 0; | |
1426 | ||
1427 | err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa); | |
1428 | if (err < 0) { | |
2064ee33 | 1429 | bt_dev_err(hdev, "failed to generate new RPA"); |
0857dd3b JH |
1430 | return err; |
1431 | } | |
1432 | ||
1433 | set_random_addr(req, &hdev->rpa); | |
1434 | ||
1435 | to = msecs_to_jiffies(hdev->rpa_timeout * 1000); | |
1436 | queue_delayed_work(hdev->workqueue, &hdev->rpa_expired, to); | |
1437 | ||
1438 | return 0; | |
1439 | } | |
1440 | ||
1441 | /* In case of required privacy without resolvable private address, | |
1442 | * use an non-resolvable private address. This is useful for active | |
1443 | * scanning and non-connectable advertising. | |
1444 | */ | |
1445 | if (require_privacy) { | |
1446 | bdaddr_t nrpa; | |
1447 | ||
1448 | while (true) { | |
1449 | /* The non-resolvable private address is generated | |
1450 | * from random six bytes with the two most significant | |
1451 | * bits cleared. | |
1452 | */ | |
1453 | get_random_bytes(&nrpa, 6); | |
1454 | nrpa.b[5] &= 0x3f; | |
1455 | ||
1456 | /* The non-resolvable private address shall not be | |
1457 | * equal to the public address. | |
1458 | */ | |
1459 | if (bacmp(&hdev->bdaddr, &nrpa)) | |
1460 | break; | |
1461 | } | |
1462 | ||
1463 | *own_addr_type = ADDR_LE_DEV_RANDOM; | |
1464 | set_random_addr(req, &nrpa); | |
1465 | return 0; | |
1466 | } | |
1467 | ||
1468 | /* If forcing static address is in use or there is no public | |
1469 | * address use the static address as random address (but skip | |
1470 | * the HCI command if the current random address is already the | |
1471 | * static one. | |
50b5b952 MH |
1472 | * |
1473 | * In case BR/EDR has been disabled on a dual-mode controller | |
1474 | * and a static address has been configured, then use that | |
1475 | * address instead of the public BR/EDR address. | |
0857dd3b | 1476 | */ |
b7cb93e5 | 1477 | if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) || |
50b5b952 | 1478 | !bacmp(&hdev->bdaddr, BDADDR_ANY) || |
d7a5a11d | 1479 | (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) && |
50b5b952 | 1480 | bacmp(&hdev->static_addr, BDADDR_ANY))) { |
0857dd3b JH |
1481 | *own_addr_type = ADDR_LE_DEV_RANDOM; |
1482 | if (bacmp(&hdev->static_addr, &hdev->random_addr)) | |
1483 | hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6, | |
1484 | &hdev->static_addr); | |
1485 | return 0; | |
1486 | } | |
1487 | ||
1488 | /* Neither privacy nor static address is being used so use a | |
1489 | * public address. | |
1490 | */ | |
1491 | *own_addr_type = ADDR_LE_DEV_PUBLIC; | |
1492 | ||
1493 | return 0; | |
1494 | } | |
2cf22218 | 1495 | |
405a2611 JH |
1496 | static bool disconnected_whitelist_entries(struct hci_dev *hdev) |
1497 | { | |
1498 | struct bdaddr_list *b; | |
1499 | ||
1500 | list_for_each_entry(b, &hdev->whitelist, list) { | |
1501 | struct hci_conn *conn; | |
1502 | ||
1503 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr); | |
1504 | if (!conn) | |
1505 | return true; | |
1506 | ||
1507 | if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) | |
1508 | return true; | |
1509 | } | |
1510 | ||
1511 | return false; | |
1512 | } | |
1513 | ||
01b1cb87 | 1514 | void __hci_req_update_scan(struct hci_request *req) |
405a2611 JH |
1515 | { |
1516 | struct hci_dev *hdev = req->hdev; | |
1517 | u8 scan; | |
1518 | ||
d7a5a11d | 1519 | if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) |
405a2611 JH |
1520 | return; |
1521 | ||
1522 | if (!hdev_is_powered(hdev)) | |
1523 | return; | |
1524 | ||
1525 | if (mgmt_powering_down(hdev)) | |
1526 | return; | |
1527 | ||
d7a5a11d | 1528 | if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) || |
405a2611 JH |
1529 | disconnected_whitelist_entries(hdev)) |
1530 | scan = SCAN_PAGE; | |
1531 | else | |
1532 | scan = SCAN_DISABLED; | |
1533 | ||
d7a5a11d | 1534 | if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE)) |
405a2611 JH |
1535 | scan |= SCAN_INQUIRY; |
1536 | ||
01b1cb87 JH |
1537 | if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) && |
1538 | test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY)) | |
1539 | return; | |
1540 | ||
405a2611 JH |
1541 | hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
1542 | } | |
1543 | ||
01b1cb87 | 1544 | static int update_scan(struct hci_request *req, unsigned long opt) |
405a2611 | 1545 | { |
01b1cb87 JH |
1546 | hci_dev_lock(req->hdev); |
1547 | __hci_req_update_scan(req); | |
1548 | hci_dev_unlock(req->hdev); | |
1549 | return 0; | |
1550 | } | |
405a2611 | 1551 | |
01b1cb87 JH |
1552 | static void scan_update_work(struct work_struct *work) |
1553 | { | |
1554 | struct hci_dev *hdev = container_of(work, struct hci_dev, scan_update); | |
1555 | ||
1556 | hci_req_sync(hdev, update_scan, 0, HCI_CMD_TIMEOUT, NULL); | |
405a2611 JH |
1557 | } |
1558 | ||
53c0ba74 JH |
1559 | static int connectable_update(struct hci_request *req, unsigned long opt) |
1560 | { | |
1561 | struct hci_dev *hdev = req->hdev; | |
1562 | ||
1563 | hci_dev_lock(hdev); | |
1564 | ||
1565 | __hci_req_update_scan(req); | |
1566 | ||
1567 | /* If BR/EDR is not enabled and we disable advertising as a | |
1568 | * by-product of disabling connectable, we need to update the | |
1569 | * advertising flags. | |
1570 | */ | |
1571 | if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) | |
cab054ab | 1572 | __hci_req_update_adv_data(req, hdev->cur_adv_instance); |
53c0ba74 JH |
1573 | |
1574 | /* Update the advertising parameters if necessary */ | |
1575 | if (hci_dev_test_flag(hdev, HCI_ADVERTISING) || | |
17fd08ff | 1576 | !list_empty(&hdev->adv_instances)) |
53c0ba74 JH |
1577 | __hci_req_enable_advertising(req); |
1578 | ||
1579 | __hci_update_background_scan(req); | |
1580 | ||
1581 | hci_dev_unlock(hdev); | |
1582 | ||
1583 | return 0; | |
1584 | } | |
1585 | ||
1586 | static void connectable_update_work(struct work_struct *work) | |
1587 | { | |
1588 | struct hci_dev *hdev = container_of(work, struct hci_dev, | |
1589 | connectable_update); | |
1590 | u8 status; | |
1591 | ||
1592 | hci_req_sync(hdev, connectable_update, 0, HCI_CMD_TIMEOUT, &status); | |
1593 | mgmt_set_connectable_complete(hdev, status); | |
1594 | } | |
1595 | ||
14bf5eac JH |
1596 | static u8 get_service_classes(struct hci_dev *hdev) |
1597 | { | |
1598 | struct bt_uuid *uuid; | |
1599 | u8 val = 0; | |
1600 | ||
1601 | list_for_each_entry(uuid, &hdev->uuids, list) | |
1602 | val |= uuid->svc_hint; | |
1603 | ||
1604 | return val; | |
1605 | } | |
1606 | ||
1607 | void __hci_req_update_class(struct hci_request *req) | |
1608 | { | |
1609 | struct hci_dev *hdev = req->hdev; | |
1610 | u8 cod[3]; | |
1611 | ||
1612 | BT_DBG("%s", hdev->name); | |
1613 | ||
1614 | if (!hdev_is_powered(hdev)) | |
1615 | return; | |
1616 | ||
1617 | if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) | |
1618 | return; | |
1619 | ||
1620 | if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE)) | |
1621 | return; | |
1622 | ||
1623 | cod[0] = hdev->minor_class; | |
1624 | cod[1] = hdev->major_class; | |
1625 | cod[2] = get_service_classes(hdev); | |
1626 | ||
1627 | if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) | |
1628 | cod[1] |= 0x20; | |
1629 | ||
1630 | if (memcmp(cod, hdev->dev_class, 3) == 0) | |
1631 | return; | |
1632 | ||
1633 | hci_req_add(req, HCI_OP_WRITE_CLASS_OF_DEV, sizeof(cod), cod); | |
1634 | } | |
1635 | ||
aed1a885 JH |
1636 | static void write_iac(struct hci_request *req) |
1637 | { | |
1638 | struct hci_dev *hdev = req->hdev; | |
1639 | struct hci_cp_write_current_iac_lap cp; | |
1640 | ||
1641 | if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE)) | |
1642 | return; | |
1643 | ||
1644 | if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) { | |
1645 | /* Limited discoverable mode */ | |
1646 | cp.num_iac = min_t(u8, hdev->num_iac, 2); | |
1647 | cp.iac_lap[0] = 0x00; /* LIAC */ | |
1648 | cp.iac_lap[1] = 0x8b; | |
1649 | cp.iac_lap[2] = 0x9e; | |
1650 | cp.iac_lap[3] = 0x33; /* GIAC */ | |
1651 | cp.iac_lap[4] = 0x8b; | |
1652 | cp.iac_lap[5] = 0x9e; | |
1653 | } else { | |
1654 | /* General discoverable mode */ | |
1655 | cp.num_iac = 1; | |
1656 | cp.iac_lap[0] = 0x33; /* GIAC */ | |
1657 | cp.iac_lap[1] = 0x8b; | |
1658 | cp.iac_lap[2] = 0x9e; | |
1659 | } | |
1660 | ||
1661 | hci_req_add(req, HCI_OP_WRITE_CURRENT_IAC_LAP, | |
1662 | (cp.num_iac * 3) + 1, &cp); | |
1663 | } | |
1664 | ||
1665 | static int discoverable_update(struct hci_request *req, unsigned long opt) | |
1666 | { | |
1667 | struct hci_dev *hdev = req->hdev; | |
1668 | ||
1669 | hci_dev_lock(hdev); | |
1670 | ||
1671 | if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) { | |
1672 | write_iac(req); | |
1673 | __hci_req_update_scan(req); | |
1674 | __hci_req_update_class(req); | |
1675 | } | |
1676 | ||
1677 | /* Advertising instances don't use the global discoverable setting, so | |
1678 | * only update AD if advertising was enabled using Set Advertising. | |
1679 | */ | |
82a37ade | 1680 | if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) { |
cab054ab | 1681 | __hci_req_update_adv_data(req, 0x00); |
aed1a885 | 1682 | |
82a37ade JH |
1683 | /* Discoverable mode affects the local advertising |
1684 | * address in limited privacy mode. | |
1685 | */ | |
1686 | if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) | |
1687 | __hci_req_enable_advertising(req); | |
1688 | } | |
1689 | ||
aed1a885 JH |
1690 | hci_dev_unlock(hdev); |
1691 | ||
1692 | return 0; | |
1693 | } | |
1694 | ||
1695 | static void discoverable_update_work(struct work_struct *work) | |
1696 | { | |
1697 | struct hci_dev *hdev = container_of(work, struct hci_dev, | |
1698 | discoverable_update); | |
1699 | u8 status; | |
1700 | ||
1701 | hci_req_sync(hdev, discoverable_update, 0, HCI_CMD_TIMEOUT, &status); | |
1702 | mgmt_set_discoverable_complete(hdev, status); | |
1703 | } | |
1704 | ||
dcc0f0d9 JH |
1705 | void __hci_abort_conn(struct hci_request *req, struct hci_conn *conn, |
1706 | u8 reason) | |
1707 | { | |
1708 | switch (conn->state) { | |
1709 | case BT_CONNECTED: | |
1710 | case BT_CONFIG: | |
1711 | if (conn->type == AMP_LINK) { | |
1712 | struct hci_cp_disconn_phy_link cp; | |
1713 | ||
1714 | cp.phy_handle = HCI_PHY_HANDLE(conn->handle); | |
1715 | cp.reason = reason; | |
1716 | hci_req_add(req, HCI_OP_DISCONN_PHY_LINK, sizeof(cp), | |
1717 | &cp); | |
1718 | } else { | |
1719 | struct hci_cp_disconnect dc; | |
1720 | ||
1721 | dc.handle = cpu_to_le16(conn->handle); | |
1722 | dc.reason = reason; | |
1723 | hci_req_add(req, HCI_OP_DISCONNECT, sizeof(dc), &dc); | |
1724 | } | |
1725 | ||
1726 | conn->state = BT_DISCONN; | |
1727 | ||
1728 | break; | |
1729 | case BT_CONNECT: | |
1730 | if (conn->type == LE_LINK) { | |
1731 | if (test_bit(HCI_CONN_SCANNING, &conn->flags)) | |
1732 | break; | |
1733 | hci_req_add(req, HCI_OP_LE_CREATE_CONN_CANCEL, | |
1734 | 0, NULL); | |
1735 | } else if (conn->type == ACL_LINK) { | |
1736 | if (req->hdev->hci_ver < BLUETOOTH_VER_1_2) | |
1737 | break; | |
1738 | hci_req_add(req, HCI_OP_CREATE_CONN_CANCEL, | |
1739 | 6, &conn->dst); | |
1740 | } | |
1741 | break; | |
1742 | case BT_CONNECT2: | |
1743 | if (conn->type == ACL_LINK) { | |
1744 | struct hci_cp_reject_conn_req rej; | |
1745 | ||
1746 | bacpy(&rej.bdaddr, &conn->dst); | |
1747 | rej.reason = reason; | |
1748 | ||
1749 | hci_req_add(req, HCI_OP_REJECT_CONN_REQ, | |
1750 | sizeof(rej), &rej); | |
1751 | } else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) { | |
1752 | struct hci_cp_reject_sync_conn_req rej; | |
1753 | ||
1754 | bacpy(&rej.bdaddr, &conn->dst); | |
1755 | ||
1756 | /* SCO rejection has its own limited set of | |
1757 | * allowed error values (0x0D-0x0F) which isn't | |
1758 | * compatible with most values passed to this | |
1759 | * function. To be safe hard-code one of the | |
1760 | * values that's suitable for SCO. | |
1761 | */ | |
3c0975a7 | 1762 | rej.reason = HCI_ERROR_REJ_LIMITED_RESOURCES; |
dcc0f0d9 JH |
1763 | |
1764 | hci_req_add(req, HCI_OP_REJECT_SYNC_CONN_REQ, | |
1765 | sizeof(rej), &rej); | |
1766 | } | |
1767 | break; | |
1768 | default: | |
1769 | conn->state = BT_CLOSED; | |
1770 | break; | |
1771 | } | |
1772 | } | |
1773 | ||
1774 | static void abort_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode) | |
1775 | { | |
1776 | if (status) | |
1777 | BT_DBG("Failed to abort connection: status 0x%2.2x", status); | |
1778 | } | |
1779 | ||
1780 | int hci_abort_conn(struct hci_conn *conn, u8 reason) | |
1781 | { | |
1782 | struct hci_request req; | |
1783 | int err; | |
1784 | ||
1785 | hci_req_init(&req, conn->hdev); | |
1786 | ||
1787 | __hci_abort_conn(&req, conn, reason); | |
1788 | ||
1789 | err = hci_req_run(&req, abort_conn_complete); | |
1790 | if (err && err != -ENODATA) { | |
2064ee33 | 1791 | bt_dev_err(conn->hdev, "failed to run HCI request: err %d", err); |
dcc0f0d9 JH |
1792 | return err; |
1793 | } | |
1794 | ||
1795 | return 0; | |
1796 | } | |
5fc16cc4 | 1797 | |
a1d01db1 | 1798 | static int update_bg_scan(struct hci_request *req, unsigned long opt) |
2e93e53b JH |
1799 | { |
1800 | hci_dev_lock(req->hdev); | |
1801 | __hci_update_background_scan(req); | |
1802 | hci_dev_unlock(req->hdev); | |
a1d01db1 | 1803 | return 0; |
2e93e53b JH |
1804 | } |
1805 | ||
1806 | static void bg_scan_update(struct work_struct *work) | |
1807 | { | |
1808 | struct hci_dev *hdev = container_of(work, struct hci_dev, | |
1809 | bg_scan_update); | |
84235d22 JH |
1810 | struct hci_conn *conn; |
1811 | u8 status; | |
1812 | int err; | |
1813 | ||
1814 | err = hci_req_sync(hdev, update_bg_scan, 0, HCI_CMD_TIMEOUT, &status); | |
1815 | if (!err) | |
1816 | return; | |
1817 | ||
1818 | hci_dev_lock(hdev); | |
1819 | ||
1820 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
1821 | if (conn) | |
1822 | hci_le_conn_failed(conn, status); | |
2e93e53b | 1823 | |
84235d22 | 1824 | hci_dev_unlock(hdev); |
2e93e53b JH |
1825 | } |
1826 | ||
f4a2cb4d | 1827 | static int le_scan_disable(struct hci_request *req, unsigned long opt) |
7c1fbed2 | 1828 | { |
f4a2cb4d JH |
1829 | hci_req_add_le_scan_disable(req); |
1830 | return 0; | |
7c1fbed2 JH |
1831 | } |
1832 | ||
f4a2cb4d | 1833 | static int bredr_inquiry(struct hci_request *req, unsigned long opt) |
7c1fbed2 | 1834 | { |
f4a2cb4d | 1835 | u8 length = opt; |
78b781ca JH |
1836 | const u8 giac[3] = { 0x33, 0x8b, 0x9e }; |
1837 | const u8 liac[3] = { 0x00, 0x8b, 0x9e }; | |
7c1fbed2 | 1838 | struct hci_cp_inquiry cp; |
7c1fbed2 | 1839 | |
f4a2cb4d | 1840 | BT_DBG("%s", req->hdev->name); |
7c1fbed2 | 1841 | |
f4a2cb4d JH |
1842 | hci_dev_lock(req->hdev); |
1843 | hci_inquiry_cache_flush(req->hdev); | |
1844 | hci_dev_unlock(req->hdev); | |
7c1fbed2 | 1845 | |
f4a2cb4d | 1846 | memset(&cp, 0, sizeof(cp)); |
78b781ca JH |
1847 | |
1848 | if (req->hdev->discovery.limited) | |
1849 | memcpy(&cp.lap, liac, sizeof(cp.lap)); | |
1850 | else | |
1851 | memcpy(&cp.lap, giac, sizeof(cp.lap)); | |
1852 | ||
f4a2cb4d | 1853 | cp.length = length; |
7c1fbed2 | 1854 | |
f4a2cb4d | 1855 | hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp); |
7c1fbed2 | 1856 | |
a1d01db1 | 1857 | return 0; |
7c1fbed2 JH |
1858 | } |
1859 | ||
1860 | static void le_scan_disable_work(struct work_struct *work) | |
1861 | { | |
1862 | struct hci_dev *hdev = container_of(work, struct hci_dev, | |
1863 | le_scan_disable.work); | |
1864 | u8 status; | |
7c1fbed2 JH |
1865 | |
1866 | BT_DBG("%s", hdev->name); | |
1867 | ||
f4a2cb4d JH |
1868 | if (!hci_dev_test_flag(hdev, HCI_LE_SCAN)) |
1869 | return; | |
1870 | ||
7c1fbed2 JH |
1871 | cancel_delayed_work(&hdev->le_scan_restart); |
1872 | ||
f4a2cb4d JH |
1873 | hci_req_sync(hdev, le_scan_disable, 0, HCI_CMD_TIMEOUT, &status); |
1874 | if (status) { | |
2064ee33 MH |
1875 | bt_dev_err(hdev, "failed to disable LE scan: status 0x%02x", |
1876 | status); | |
f4a2cb4d JH |
1877 | return; |
1878 | } | |
1879 | ||
1880 | hdev->discovery.scan_start = 0; | |
1881 | ||
1882 | /* If we were running LE only scan, change discovery state. If | |
1883 | * we were running both LE and BR/EDR inquiry simultaneously, | |
1884 | * and BR/EDR inquiry is already finished, stop discovery, | |
1885 | * otherwise BR/EDR inquiry will stop discovery when finished. | |
1886 | * If we will resolve remote device name, do not change | |
1887 | * discovery state. | |
1888 | */ | |
1889 | ||
1890 | if (hdev->discovery.type == DISCOV_TYPE_LE) | |
1891 | goto discov_stopped; | |
1892 | ||
1893 | if (hdev->discovery.type != DISCOV_TYPE_INTERLEAVED) | |
7c1fbed2 JH |
1894 | return; |
1895 | ||
f4a2cb4d JH |
1896 | if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks)) { |
1897 | if (!test_bit(HCI_INQUIRY, &hdev->flags) && | |
1898 | hdev->discovery.state != DISCOVERY_RESOLVING) | |
1899 | goto discov_stopped; | |
1900 | ||
1901 | return; | |
1902 | } | |
1903 | ||
1904 | hci_req_sync(hdev, bredr_inquiry, DISCOV_INTERLEAVED_INQUIRY_LEN, | |
1905 | HCI_CMD_TIMEOUT, &status); | |
1906 | if (status) { | |
2064ee33 | 1907 | bt_dev_err(hdev, "inquiry failed: status 0x%02x", status); |
f4a2cb4d JH |
1908 | goto discov_stopped; |
1909 | } | |
1910 | ||
1911 | return; | |
1912 | ||
1913 | discov_stopped: | |
1914 | hci_dev_lock(hdev); | |
1915 | hci_discovery_set_state(hdev, DISCOVERY_STOPPED); | |
1916 | hci_dev_unlock(hdev); | |
7c1fbed2 JH |
1917 | } |
1918 | ||
3dfe5905 JH |
1919 | static int le_scan_restart(struct hci_request *req, unsigned long opt) |
1920 | { | |
1921 | struct hci_dev *hdev = req->hdev; | |
1922 | struct hci_cp_le_set_scan_enable cp; | |
1923 | ||
1924 | /* If controller is not scanning we are done. */ | |
1925 | if (!hci_dev_test_flag(hdev, HCI_LE_SCAN)) | |
1926 | return 0; | |
1927 | ||
1928 | hci_req_add_le_scan_disable(req); | |
1929 | ||
1930 | memset(&cp, 0, sizeof(cp)); | |
1931 | cp.enable = LE_SCAN_ENABLE; | |
1932 | cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE; | |
1933 | hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp); | |
1934 | ||
1935 | return 0; | |
1936 | } | |
1937 | ||
1938 | static void le_scan_restart_work(struct work_struct *work) | |
7c1fbed2 | 1939 | { |
3dfe5905 JH |
1940 | struct hci_dev *hdev = container_of(work, struct hci_dev, |
1941 | le_scan_restart.work); | |
7c1fbed2 | 1942 | unsigned long timeout, duration, scan_start, now; |
3dfe5905 | 1943 | u8 status; |
7c1fbed2 JH |
1944 | |
1945 | BT_DBG("%s", hdev->name); | |
1946 | ||
3dfe5905 | 1947 | hci_req_sync(hdev, le_scan_restart, 0, HCI_CMD_TIMEOUT, &status); |
7c1fbed2 | 1948 | if (status) { |
2064ee33 MH |
1949 | bt_dev_err(hdev, "failed to restart LE scan: status %d", |
1950 | status); | |
7c1fbed2 JH |
1951 | return; |
1952 | } | |
1953 | ||
1954 | hci_dev_lock(hdev); | |
1955 | ||
1956 | if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) || | |
1957 | !hdev->discovery.scan_start) | |
1958 | goto unlock; | |
1959 | ||
1960 | /* When the scan was started, hdev->le_scan_disable has been queued | |
1961 | * after duration from scan_start. During scan restart this job | |
1962 | * has been canceled, and we need to queue it again after proper | |
1963 | * timeout, to make sure that scan does not run indefinitely. | |
1964 | */ | |
1965 | duration = hdev->discovery.scan_duration; | |
1966 | scan_start = hdev->discovery.scan_start; | |
1967 | now = jiffies; | |
1968 | if (now - scan_start <= duration) { | |
1969 | int elapsed; | |
1970 | ||
1971 | if (now >= scan_start) | |
1972 | elapsed = now - scan_start; | |
1973 | else | |
1974 | elapsed = ULONG_MAX - scan_start + now; | |
1975 | ||
1976 | timeout = duration - elapsed; | |
1977 | } else { | |
1978 | timeout = 0; | |
1979 | } | |
1980 | ||
1981 | queue_delayed_work(hdev->req_workqueue, | |
1982 | &hdev->le_scan_disable, timeout); | |
1983 | ||
1984 | unlock: | |
1985 | hci_dev_unlock(hdev); | |
1986 | } | |
1987 | ||
e68f072b JH |
1988 | static void disable_advertising(struct hci_request *req) |
1989 | { | |
1990 | u8 enable = 0x00; | |
1991 | ||
1992 | hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable); | |
1993 | } | |
1994 | ||
1995 | static int active_scan(struct hci_request *req, unsigned long opt) | |
1996 | { | |
1997 | uint16_t interval = opt; | |
1998 | struct hci_dev *hdev = req->hdev; | |
1999 | struct hci_cp_le_set_scan_param param_cp; | |
2000 | struct hci_cp_le_set_scan_enable enable_cp; | |
2001 | u8 own_addr_type; | |
2002 | int err; | |
2003 | ||
2004 | BT_DBG("%s", hdev->name); | |
2005 | ||
2006 | if (hci_dev_test_flag(hdev, HCI_LE_ADV)) { | |
2007 | hci_dev_lock(hdev); | |
2008 | ||
2009 | /* Don't let discovery abort an outgoing connection attempt | |
2010 | * that's using directed advertising. | |
2011 | */ | |
2012 | if (hci_lookup_le_connect(hdev)) { | |
2013 | hci_dev_unlock(hdev); | |
2014 | return -EBUSY; | |
2015 | } | |
2016 | ||
2017 | cancel_adv_timeout(hdev); | |
2018 | hci_dev_unlock(hdev); | |
2019 | ||
2020 | disable_advertising(req); | |
2021 | } | |
2022 | ||
2023 | /* If controller is scanning, it means the background scanning is | |
2024 | * running. Thus, we should temporarily stop it in order to set the | |
2025 | * discovery scanning parameters. | |
2026 | */ | |
2027 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) | |
2028 | hci_req_add_le_scan_disable(req); | |
2029 | ||
2030 | /* All active scans will be done with either a resolvable private | |
2031 | * address (when privacy feature has been enabled) or non-resolvable | |
2032 | * private address. | |
2033 | */ | |
82a37ade JH |
2034 | err = hci_update_random_address(req, true, scan_use_rpa(hdev), |
2035 | &own_addr_type); | |
e68f072b JH |
2036 | if (err < 0) |
2037 | own_addr_type = ADDR_LE_DEV_PUBLIC; | |
2038 | ||
2039 | memset(¶m_cp, 0, sizeof(param_cp)); | |
2040 | param_cp.type = LE_SCAN_ACTIVE; | |
2041 | param_cp.interval = cpu_to_le16(interval); | |
2042 | param_cp.window = cpu_to_le16(DISCOV_LE_SCAN_WIN); | |
2043 | param_cp.own_address_type = own_addr_type; | |
2044 | ||
2045 | hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp), | |
2046 | ¶m_cp); | |
2047 | ||
2048 | memset(&enable_cp, 0, sizeof(enable_cp)); | |
2049 | enable_cp.enable = LE_SCAN_ENABLE; | |
2050 | enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE; | |
2051 | ||
2052 | hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp), | |
2053 | &enable_cp); | |
2054 | ||
2055 | return 0; | |
2056 | } | |
2057 | ||
2058 | static int interleaved_discov(struct hci_request *req, unsigned long opt) | |
2059 | { | |
2060 | int err; | |
2061 | ||
2062 | BT_DBG("%s", req->hdev->name); | |
2063 | ||
2064 | err = active_scan(req, opt); | |
2065 | if (err) | |
2066 | return err; | |
2067 | ||
7df26b56 | 2068 | return bredr_inquiry(req, DISCOV_BREDR_INQUIRY_LEN); |
e68f072b JH |
2069 | } |
2070 | ||
2071 | static void start_discovery(struct hci_dev *hdev, u8 *status) | |
2072 | { | |
2073 | unsigned long timeout; | |
2074 | ||
2075 | BT_DBG("%s type %u", hdev->name, hdev->discovery.type); | |
2076 | ||
2077 | switch (hdev->discovery.type) { | |
2078 | case DISCOV_TYPE_BREDR: | |
2079 | if (!hci_dev_test_flag(hdev, HCI_INQUIRY)) | |
7df26b56 JH |
2080 | hci_req_sync(hdev, bredr_inquiry, |
2081 | DISCOV_BREDR_INQUIRY_LEN, HCI_CMD_TIMEOUT, | |
e68f072b JH |
2082 | status); |
2083 | return; | |
2084 | case DISCOV_TYPE_INTERLEAVED: | |
2085 | /* When running simultaneous discovery, the LE scanning time | |
2086 | * should occupy the whole discovery time sine BR/EDR inquiry | |
2087 | * and LE scanning are scheduled by the controller. | |
2088 | * | |
2089 | * For interleaving discovery in comparison, BR/EDR inquiry | |
2090 | * and LE scanning are done sequentially with separate | |
2091 | * timeouts. | |
2092 | */ | |
2093 | if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, | |
2094 | &hdev->quirks)) { | |
2095 | timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT); | |
2096 | /* During simultaneous discovery, we double LE scan | |
2097 | * interval. We must leave some time for the controller | |
2098 | * to do BR/EDR inquiry. | |
2099 | */ | |
2100 | hci_req_sync(hdev, interleaved_discov, | |
2101 | DISCOV_LE_SCAN_INT * 2, HCI_CMD_TIMEOUT, | |
2102 | status); | |
2103 | break; | |
2104 | } | |
2105 | ||
2106 | timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout); | |
2107 | hci_req_sync(hdev, active_scan, DISCOV_LE_SCAN_INT, | |
2108 | HCI_CMD_TIMEOUT, status); | |
2109 | break; | |
2110 | case DISCOV_TYPE_LE: | |
2111 | timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT); | |
2112 | hci_req_sync(hdev, active_scan, DISCOV_LE_SCAN_INT, | |
2113 | HCI_CMD_TIMEOUT, status); | |
2114 | break; | |
2115 | default: | |
2116 | *status = HCI_ERROR_UNSPECIFIED; | |
2117 | return; | |
2118 | } | |
2119 | ||
2120 | if (*status) | |
2121 | return; | |
2122 | ||
2123 | BT_DBG("%s timeout %u ms", hdev->name, jiffies_to_msecs(timeout)); | |
2124 | ||
2125 | /* When service discovery is used and the controller has a | |
2126 | * strict duplicate filter, it is important to remember the | |
2127 | * start and duration of the scan. This is required for | |
2128 | * restarting scanning during the discovery phase. | |
2129 | */ | |
2130 | if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) && | |
2131 | hdev->discovery.result_filtering) { | |
2132 | hdev->discovery.scan_start = jiffies; | |
2133 | hdev->discovery.scan_duration = timeout; | |
2134 | } | |
2135 | ||
2136 | queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable, | |
2137 | timeout); | |
2138 | } | |
2139 | ||
2154d3f4 JH |
2140 | bool hci_req_stop_discovery(struct hci_request *req) |
2141 | { | |
2142 | struct hci_dev *hdev = req->hdev; | |
2143 | struct discovery_state *d = &hdev->discovery; | |
2144 | struct hci_cp_remote_name_req_cancel cp; | |
2145 | struct inquiry_entry *e; | |
2146 | bool ret = false; | |
2147 | ||
2148 | BT_DBG("%s state %u", hdev->name, hdev->discovery.state); | |
2149 | ||
2150 | if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) { | |
2151 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
2152 | hci_req_add(req, HCI_OP_INQUIRY_CANCEL, 0, NULL); | |
2153 | ||
2154 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) { | |
2155 | cancel_delayed_work(&hdev->le_scan_disable); | |
2156 | hci_req_add_le_scan_disable(req); | |
2157 | } | |
2158 | ||
2159 | ret = true; | |
2160 | } else { | |
2161 | /* Passive scanning */ | |
2162 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) { | |
2163 | hci_req_add_le_scan_disable(req); | |
2164 | ret = true; | |
2165 | } | |
2166 | } | |
2167 | ||
2168 | /* No further actions needed for LE-only discovery */ | |
2169 | if (d->type == DISCOV_TYPE_LE) | |
2170 | return ret; | |
2171 | ||
2172 | if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) { | |
2173 | e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, | |
2174 | NAME_PENDING); | |
2175 | if (!e) | |
2176 | return ret; | |
2177 | ||
2178 | bacpy(&cp.bdaddr, &e->data.bdaddr); | |
2179 | hci_req_add(req, HCI_OP_REMOTE_NAME_REQ_CANCEL, sizeof(cp), | |
2180 | &cp); | |
2181 | ret = true; | |
2182 | } | |
2183 | ||
2184 | return ret; | |
2185 | } | |
2186 | ||
2187 | static int stop_discovery(struct hci_request *req, unsigned long opt) | |
2188 | { | |
2189 | hci_dev_lock(req->hdev); | |
2190 | hci_req_stop_discovery(req); | |
2191 | hci_dev_unlock(req->hdev); | |
2192 | ||
2193 | return 0; | |
2194 | } | |
2195 | ||
e68f072b JH |
2196 | static void discov_update(struct work_struct *work) |
2197 | { | |
2198 | struct hci_dev *hdev = container_of(work, struct hci_dev, | |
2199 | discov_update); | |
2200 | u8 status = 0; | |
2201 | ||
2202 | switch (hdev->discovery.state) { | |
2203 | case DISCOVERY_STARTING: | |
2204 | start_discovery(hdev, &status); | |
2205 | mgmt_start_discovery_complete(hdev, status); | |
2206 | if (status) | |
2207 | hci_discovery_set_state(hdev, DISCOVERY_STOPPED); | |
2208 | else | |
2209 | hci_discovery_set_state(hdev, DISCOVERY_FINDING); | |
2210 | break; | |
2154d3f4 JH |
2211 | case DISCOVERY_STOPPING: |
2212 | hci_req_sync(hdev, stop_discovery, 0, HCI_CMD_TIMEOUT, &status); | |
2213 | mgmt_stop_discovery_complete(hdev, status); | |
2214 | if (!status) | |
2215 | hci_discovery_set_state(hdev, DISCOVERY_STOPPED); | |
2216 | break; | |
e68f072b JH |
2217 | case DISCOVERY_STOPPED: |
2218 | default: | |
2219 | return; | |
2220 | } | |
2221 | } | |
2222 | ||
c366f555 JH |
2223 | static void discov_off(struct work_struct *work) |
2224 | { | |
2225 | struct hci_dev *hdev = container_of(work, struct hci_dev, | |
2226 | discov_off.work); | |
2227 | ||
2228 | BT_DBG("%s", hdev->name); | |
2229 | ||
2230 | hci_dev_lock(hdev); | |
2231 | ||
2232 | /* When discoverable timeout triggers, then just make sure | |
2233 | * the limited discoverable flag is cleared. Even in the case | |
2234 | * of a timeout triggered from general discoverable, it is | |
2235 | * safe to unconditionally clear the flag. | |
2236 | */ | |
2237 | hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE); | |
2238 | hci_dev_clear_flag(hdev, HCI_DISCOVERABLE); | |
2239 | hdev->discov_timeout = 0; | |
2240 | ||
2241 | hci_dev_unlock(hdev); | |
2242 | ||
2243 | hci_req_sync(hdev, discoverable_update, 0, HCI_CMD_TIMEOUT, NULL); | |
2244 | mgmt_new_settings(hdev); | |
2245 | } | |
2246 | ||
2ff13894 JH |
2247 | static int powered_update_hci(struct hci_request *req, unsigned long opt) |
2248 | { | |
2249 | struct hci_dev *hdev = req->hdev; | |
2ff13894 JH |
2250 | u8 link_sec; |
2251 | ||
2252 | hci_dev_lock(hdev); | |
2253 | ||
2254 | if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) && | |
2255 | !lmp_host_ssp_capable(hdev)) { | |
2256 | u8 mode = 0x01; | |
2257 | ||
2258 | hci_req_add(req, HCI_OP_WRITE_SSP_MODE, sizeof(mode), &mode); | |
2259 | ||
2260 | if (bredr_sc_enabled(hdev) && !lmp_host_sc_capable(hdev)) { | |
2261 | u8 support = 0x01; | |
2262 | ||
2263 | hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT, | |
2264 | sizeof(support), &support); | |
2265 | } | |
2266 | } | |
2267 | ||
2268 | if (hci_dev_test_flag(hdev, HCI_LE_ENABLED) && | |
2269 | lmp_bredr_capable(hdev)) { | |
2270 | struct hci_cp_write_le_host_supported cp; | |
2271 | ||
2272 | cp.le = 0x01; | |
2273 | cp.simul = 0x00; | |
2274 | ||
2275 | /* Check first if we already have the right | |
2276 | * host state (host features set) | |
2277 | */ | |
2278 | if (cp.le != lmp_host_le_capable(hdev) || | |
2279 | cp.simul != lmp_host_le_br_capable(hdev)) | |
2280 | hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, | |
2281 | sizeof(cp), &cp); | |
2282 | } | |
2283 | ||
d6b7e2cd | 2284 | if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { |
2ff13894 JH |
2285 | /* Make sure the controller has a good default for |
2286 | * advertising data. This also applies to the case | |
2287 | * where BR/EDR was toggled during the AUTO_OFF phase. | |
2288 | */ | |
d6b7e2cd JH |
2289 | if (hci_dev_test_flag(hdev, HCI_ADVERTISING) || |
2290 | list_empty(&hdev->adv_instances)) { | |
2291 | __hci_req_update_adv_data(req, 0x00); | |
2292 | __hci_req_update_scan_rsp_data(req, 0x00); | |
2293 | ||
2294 | if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) | |
2295 | __hci_req_enable_advertising(req); | |
2296 | } else if (!list_empty(&hdev->adv_instances)) { | |
2297 | struct adv_info *adv_instance; | |
2ff13894 | 2298 | |
2ff13894 JH |
2299 | adv_instance = list_first_entry(&hdev->adv_instances, |
2300 | struct adv_info, list); | |
2ff13894 | 2301 | __hci_req_schedule_adv_instance(req, |
d6b7e2cd | 2302 | adv_instance->instance, |
2ff13894 | 2303 | true); |
d6b7e2cd | 2304 | } |
2ff13894 JH |
2305 | } |
2306 | ||
2307 | link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY); | |
2308 | if (link_sec != test_bit(HCI_AUTH, &hdev->flags)) | |
2309 | hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, | |
2310 | sizeof(link_sec), &link_sec); | |
2311 | ||
2312 | if (lmp_bredr_capable(hdev)) { | |
2313 | if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE)) | |
2314 | __hci_req_write_fast_connectable(req, true); | |
2315 | else | |
2316 | __hci_req_write_fast_connectable(req, false); | |
2317 | __hci_req_update_scan(req); | |
2318 | __hci_req_update_class(req); | |
2319 | __hci_req_update_name(req); | |
2320 | __hci_req_update_eir(req); | |
2321 | } | |
2322 | ||
2323 | hci_dev_unlock(hdev); | |
2324 | return 0; | |
2325 | } | |
2326 | ||
2327 | int __hci_req_hci_power_on(struct hci_dev *hdev) | |
2328 | { | |
2329 | /* Register the available SMP channels (BR/EDR and LE) only when | |
2330 | * successfully powering on the controller. This late | |
2331 | * registration is required so that LE SMP can clearly decide if | |
2332 | * the public address or static address is used. | |
2333 | */ | |
2334 | smp_register(hdev); | |
2335 | ||
2336 | return __hci_req_sync(hdev, powered_update_hci, 0, HCI_CMD_TIMEOUT, | |
2337 | NULL); | |
2338 | } | |
2339 | ||
5fc16cc4 JH |
2340 | void hci_request_setup(struct hci_dev *hdev) |
2341 | { | |
e68f072b | 2342 | INIT_WORK(&hdev->discov_update, discov_update); |
2e93e53b | 2343 | INIT_WORK(&hdev->bg_scan_update, bg_scan_update); |
01b1cb87 | 2344 | INIT_WORK(&hdev->scan_update, scan_update_work); |
53c0ba74 | 2345 | INIT_WORK(&hdev->connectable_update, connectable_update_work); |
aed1a885 | 2346 | INIT_WORK(&hdev->discoverable_update, discoverable_update_work); |
c366f555 | 2347 | INIT_DELAYED_WORK(&hdev->discov_off, discov_off); |
7c1fbed2 JH |
2348 | INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work); |
2349 | INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart_work); | |
f2252570 | 2350 | INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire); |
5fc16cc4 JH |
2351 | } |
2352 | ||
2353 | void hci_request_cancel_all(struct hci_dev *hdev) | |
2354 | { | |
7df0f73e JH |
2355 | hci_req_sync_cancel(hdev, ENODEV); |
2356 | ||
e68f072b | 2357 | cancel_work_sync(&hdev->discov_update); |
2e93e53b | 2358 | cancel_work_sync(&hdev->bg_scan_update); |
01b1cb87 | 2359 | cancel_work_sync(&hdev->scan_update); |
53c0ba74 | 2360 | cancel_work_sync(&hdev->connectable_update); |
aed1a885 | 2361 | cancel_work_sync(&hdev->discoverable_update); |
c366f555 | 2362 | cancel_delayed_work_sync(&hdev->discov_off); |
7c1fbed2 JH |
2363 | cancel_delayed_work_sync(&hdev->le_scan_disable); |
2364 | cancel_delayed_work_sync(&hdev->le_scan_restart); | |
f2252570 JH |
2365 | |
2366 | if (hdev->adv_instance_timeout) { | |
2367 | cancel_delayed_work_sync(&hdev->adv_instance_expire); | |
2368 | hdev->adv_instance_timeout = 0; | |
2369 | } | |
5fc16cc4 | 2370 | } |