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1 | /* | |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
19 | ||
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
22 | SOFTWARE IS DISCLAIMED. | |
23 | */ | |
24 | ||
25 | /* Bluetooth HCI connection handling. */ | |
26 | ||
27 | #include <linux/module.h> | |
28 | ||
29 | #include <linux/types.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/poll.h> | |
34 | #include <linux/fcntl.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/skbuff.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/notifier.h> | |
39 | #include <net/sock.h> | |
40 | ||
41 | #include <asm/system.h> | |
42 | #include <asm/uaccess.h> | |
43 | #include <asm/unaligned.h> | |
44 | ||
45 | #include <net/bluetooth/bluetooth.h> | |
46 | #include <net/bluetooth/hci_core.h> | |
47 | ||
48 | #ifndef CONFIG_BT_HCI_CORE_DEBUG | |
49 | #undef BT_DBG | |
50 | #define BT_DBG(D...) | |
51 | #endif | |
52 | ||
53 | void hci_acl_connect(struct hci_conn *conn) | |
54 | { | |
55 | struct hci_dev *hdev = conn->hdev; | |
56 | struct inquiry_entry *ie; | |
57 | struct hci_cp_create_conn cp; | |
58 | ||
59 | BT_DBG("%p", conn); | |
60 | ||
61 | conn->state = BT_CONNECT; | |
62 | conn->out = 1; | |
63 | conn->link_mode = HCI_LM_MASTER; | |
64 | ||
65 | conn->attempt++; | |
66 | ||
67 | memset(&cp, 0, sizeof(cp)); | |
68 | bacpy(&cp.bdaddr, &conn->dst); | |
69 | cp.pscan_rep_mode = 0x02; | |
70 | ||
71 | if ((ie = hci_inquiry_cache_lookup(hdev, &conn->dst)) && | |
72 | inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { | |
73 | cp.pscan_rep_mode = ie->data.pscan_rep_mode; | |
74 | cp.pscan_mode = ie->data.pscan_mode; | |
75 | cp.clock_offset = ie->data.clock_offset | cpu_to_le16(0x8000); | |
76 | memcpy(conn->dev_class, ie->data.dev_class, 3); | |
77 | } | |
78 | ||
79 | cp.pkt_type = cpu_to_le16(hdev->pkt_type & ACL_PTYPE_MASK); | |
80 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) | |
81 | cp.role_switch = 0x01; | |
82 | else | |
83 | cp.role_switch = 0x00; | |
84 | ||
85 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); | |
86 | } | |
87 | ||
88 | static void hci_acl_connect_cancel(struct hci_conn *conn) | |
89 | { | |
90 | struct hci_cp_create_conn_cancel cp; | |
91 | ||
92 | BT_DBG("%p", conn); | |
93 | ||
94 | if (conn->hdev->hci_ver < 2) | |
95 | return; | |
96 | ||
97 | bacpy(&cp.bdaddr, &conn->dst); | |
98 | hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); | |
99 | } | |
100 | ||
101 | void hci_acl_disconn(struct hci_conn *conn, __u8 reason) | |
102 | { | |
103 | struct hci_cp_disconnect cp; | |
104 | ||
105 | BT_DBG("%p", conn); | |
106 | ||
107 | conn->state = BT_DISCONN; | |
108 | ||
109 | cp.handle = cpu_to_le16(conn->handle); | |
110 | cp.reason = reason; | |
111 | hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); | |
112 | } | |
113 | ||
114 | void hci_add_sco(struct hci_conn *conn, __u16 handle) | |
115 | { | |
116 | struct hci_dev *hdev = conn->hdev; | |
117 | struct hci_cp_add_sco cp; | |
118 | ||
119 | BT_DBG("%p", conn); | |
120 | ||
121 | conn->state = BT_CONNECT; | |
122 | conn->out = 1; | |
123 | ||
124 | cp.handle = cpu_to_le16(handle); | |
125 | cp.pkt_type = cpu_to_le16(hdev->pkt_type & SCO_PTYPE_MASK); | |
126 | ||
127 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); | |
128 | } | |
129 | ||
130 | void hci_setup_sync(struct hci_conn *conn, __u16 handle) | |
131 | { | |
132 | struct hci_dev *hdev = conn->hdev; | |
133 | struct hci_cp_setup_sync_conn cp; | |
134 | ||
135 | BT_DBG("%p", conn); | |
136 | ||
137 | conn->state = BT_CONNECT; | |
138 | conn->out = 1; | |
139 | ||
140 | cp.handle = cpu_to_le16(handle); | |
141 | cp.pkt_type = cpu_to_le16(hdev->esco_type); | |
142 | ||
143 | cp.tx_bandwidth = cpu_to_le32(0x00001f40); | |
144 | cp.rx_bandwidth = cpu_to_le32(0x00001f40); | |
145 | cp.max_latency = cpu_to_le16(0xffff); | |
146 | cp.voice_setting = cpu_to_le16(hdev->voice_setting); | |
147 | cp.retrans_effort = 0xff; | |
148 | ||
149 | hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp); | |
150 | } | |
151 | ||
152 | static void hci_conn_timeout(unsigned long arg) | |
153 | { | |
154 | struct hci_conn *conn = (void *) arg; | |
155 | struct hci_dev *hdev = conn->hdev; | |
156 | ||
157 | BT_DBG("conn %p state %d", conn, conn->state); | |
158 | ||
159 | if (atomic_read(&conn->refcnt)) | |
160 | return; | |
161 | ||
162 | hci_dev_lock(hdev); | |
163 | ||
164 | switch (conn->state) { | |
165 | case BT_CONNECT: | |
166 | if (conn->type == ACL_LINK) | |
167 | hci_acl_connect_cancel(conn); | |
168 | else | |
169 | hci_acl_disconn(conn, 0x13); | |
170 | break; | |
171 | case BT_CONNECTED: | |
172 | hci_acl_disconn(conn, 0x13); | |
173 | break; | |
174 | default: | |
175 | conn->state = BT_CLOSED; | |
176 | break; | |
177 | } | |
178 | ||
179 | hci_dev_unlock(hdev); | |
180 | } | |
181 | ||
182 | static void hci_conn_idle(unsigned long arg) | |
183 | { | |
184 | struct hci_conn *conn = (void *) arg; | |
185 | ||
186 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
187 | ||
188 | hci_conn_enter_sniff_mode(conn); | |
189 | } | |
190 | ||
191 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst) | |
192 | { | |
193 | struct hci_conn *conn; | |
194 | ||
195 | BT_DBG("%s dst %s", hdev->name, batostr(dst)); | |
196 | ||
197 | conn = kzalloc(sizeof(struct hci_conn), GFP_ATOMIC); | |
198 | if (!conn) | |
199 | return NULL; | |
200 | ||
201 | bacpy(&conn->dst, dst); | |
202 | conn->hdev = hdev; | |
203 | conn->type = type; | |
204 | conn->mode = HCI_CM_ACTIVE; | |
205 | conn->state = BT_OPEN; | |
206 | ||
207 | conn->power_save = 1; | |
208 | ||
209 | skb_queue_head_init(&conn->data_q); | |
210 | ||
211 | setup_timer(&conn->disc_timer, hci_conn_timeout, (unsigned long)conn); | |
212 | setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn); | |
213 | ||
214 | atomic_set(&conn->refcnt, 0); | |
215 | ||
216 | hci_dev_hold(hdev); | |
217 | ||
218 | tasklet_disable(&hdev->tx_task); | |
219 | ||
220 | hci_conn_hash_add(hdev, conn); | |
221 | if (hdev->notify) | |
222 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); | |
223 | ||
224 | hci_conn_add_sysfs(conn); | |
225 | ||
226 | tasklet_enable(&hdev->tx_task); | |
227 | ||
228 | return conn; | |
229 | } | |
230 | ||
231 | int hci_conn_del(struct hci_conn *conn) | |
232 | { | |
233 | struct hci_dev *hdev = conn->hdev; | |
234 | ||
235 | BT_DBG("%s conn %p handle %d", hdev->name, conn, conn->handle); | |
236 | ||
237 | del_timer(&conn->idle_timer); | |
238 | ||
239 | del_timer(&conn->disc_timer); | |
240 | ||
241 | if (conn->type == ACL_LINK) { | |
242 | struct hci_conn *sco = conn->link; | |
243 | if (sco) | |
244 | sco->link = NULL; | |
245 | ||
246 | /* Unacked frames */ | |
247 | hdev->acl_cnt += conn->sent; | |
248 | } else { | |
249 | struct hci_conn *acl = conn->link; | |
250 | if (acl) { | |
251 | acl->link = NULL; | |
252 | hci_conn_put(acl); | |
253 | } | |
254 | } | |
255 | ||
256 | tasklet_disable(&hdev->tx_task); | |
257 | hci_conn_hash_del(hdev, conn); | |
258 | if (hdev->notify) | |
259 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); | |
260 | tasklet_enable(&hdev->tx_task); | |
261 | skb_queue_purge(&conn->data_q); | |
262 | hci_conn_del_sysfs(conn); | |
263 | hci_dev_put(hdev); | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
269 | { | |
270 | int use_src = bacmp(src, BDADDR_ANY); | |
271 | struct hci_dev *hdev = NULL; | |
272 | struct list_head *p; | |
273 | ||
274 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
275 | ||
276 | read_lock_bh(&hci_dev_list_lock); | |
277 | ||
278 | list_for_each(p, &hci_dev_list) { | |
279 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
280 | ||
281 | if (!test_bit(HCI_UP, &d->flags) || test_bit(HCI_RAW, &d->flags)) | |
282 | continue; | |
283 | ||
284 | /* Simple routing: | |
285 | * No source address - find interface with bdaddr != dst | |
286 | * Source address - find interface with bdaddr == src | |
287 | */ | |
288 | ||
289 | if (use_src) { | |
290 | if (!bacmp(&d->bdaddr, src)) { | |
291 | hdev = d; break; | |
292 | } | |
293 | } else { | |
294 | if (bacmp(&d->bdaddr, dst)) { | |
295 | hdev = d; break; | |
296 | } | |
297 | } | |
298 | } | |
299 | ||
300 | if (hdev) | |
301 | hdev = hci_dev_hold(hdev); | |
302 | ||
303 | read_unlock_bh(&hci_dev_list_lock); | |
304 | return hdev; | |
305 | } | |
306 | EXPORT_SYMBOL(hci_get_route); | |
307 | ||
308 | /* Create SCO or ACL connection. | |
309 | * Device _must_ be locked */ | |
310 | struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst) | |
311 | { | |
312 | struct hci_conn *acl; | |
313 | struct hci_conn *sco; | |
314 | ||
315 | BT_DBG("%s dst %s", hdev->name, batostr(dst)); | |
316 | ||
317 | if (!(acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst))) { | |
318 | if (!(acl = hci_conn_add(hdev, ACL_LINK, dst))) | |
319 | return NULL; | |
320 | } | |
321 | ||
322 | hci_conn_hold(acl); | |
323 | ||
324 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) | |
325 | hci_acl_connect(acl); | |
326 | ||
327 | if (type == ACL_LINK) | |
328 | return acl; | |
329 | ||
330 | if (!(sco = hci_conn_hash_lookup_ba(hdev, type, dst))) { | |
331 | if (!(sco = hci_conn_add(hdev, type, dst))) { | |
332 | hci_conn_put(acl); | |
333 | return NULL; | |
334 | } | |
335 | } | |
336 | ||
337 | acl->link = sco; | |
338 | sco->link = acl; | |
339 | ||
340 | hci_conn_hold(sco); | |
341 | ||
342 | if (acl->state == BT_CONNECTED && | |
343 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { | |
344 | if (lmp_esco_capable(hdev)) | |
345 | hci_setup_sync(sco, acl->handle); | |
346 | else | |
347 | hci_add_sco(sco, acl->handle); | |
348 | } | |
349 | ||
350 | return sco; | |
351 | } | |
352 | EXPORT_SYMBOL(hci_connect); | |
353 | ||
354 | /* Authenticate remote device */ | |
355 | int hci_conn_auth(struct hci_conn *conn) | |
356 | { | |
357 | BT_DBG("conn %p", conn); | |
358 | ||
359 | if (conn->link_mode & HCI_LM_AUTH) | |
360 | return 1; | |
361 | ||
362 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) { | |
363 | struct hci_cp_auth_requested cp; | |
364 | cp.handle = cpu_to_le16(conn->handle); | |
365 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp); | |
366 | } | |
367 | return 0; | |
368 | } | |
369 | EXPORT_SYMBOL(hci_conn_auth); | |
370 | ||
371 | /* Enable encryption */ | |
372 | int hci_conn_encrypt(struct hci_conn *conn) | |
373 | { | |
374 | BT_DBG("conn %p", conn); | |
375 | ||
376 | if (conn->link_mode & HCI_LM_ENCRYPT) | |
377 | return 1; | |
378 | ||
379 | if (test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend)) | |
380 | return 0; | |
381 | ||
382 | if (hci_conn_auth(conn)) { | |
383 | struct hci_cp_set_conn_encrypt cp; | |
384 | cp.handle = cpu_to_le16(conn->handle); | |
385 | cp.encrypt = 1; | |
386 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), &cp); | |
387 | } | |
388 | return 0; | |
389 | } | |
390 | EXPORT_SYMBOL(hci_conn_encrypt); | |
391 | ||
392 | /* Change link key */ | |
393 | int hci_conn_change_link_key(struct hci_conn *conn) | |
394 | { | |
395 | BT_DBG("conn %p", conn); | |
396 | ||
397 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) { | |
398 | struct hci_cp_change_conn_link_key cp; | |
399 | cp.handle = cpu_to_le16(conn->handle); | |
400 | hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY, sizeof(cp), &cp); | |
401 | } | |
402 | return 0; | |
403 | } | |
404 | EXPORT_SYMBOL(hci_conn_change_link_key); | |
405 | ||
406 | /* Switch role */ | |
407 | int hci_conn_switch_role(struct hci_conn *conn, uint8_t role) | |
408 | { | |
409 | BT_DBG("conn %p", conn); | |
410 | ||
411 | if (!role && conn->link_mode & HCI_LM_MASTER) | |
412 | return 1; | |
413 | ||
414 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->pend)) { | |
415 | struct hci_cp_switch_role cp; | |
416 | bacpy(&cp.bdaddr, &conn->dst); | |
417 | cp.role = role; | |
418 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); | |
419 | } | |
420 | return 0; | |
421 | } | |
422 | EXPORT_SYMBOL(hci_conn_switch_role); | |
423 | ||
424 | /* Enter active mode */ | |
425 | void hci_conn_enter_active_mode(struct hci_conn *conn) | |
426 | { | |
427 | struct hci_dev *hdev = conn->hdev; | |
428 | ||
429 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
430 | ||
431 | if (test_bit(HCI_RAW, &hdev->flags)) | |
432 | return; | |
433 | ||
434 | if (conn->mode != HCI_CM_SNIFF || !conn->power_save) | |
435 | goto timer; | |
436 | ||
437 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend)) { | |
438 | struct hci_cp_exit_sniff_mode cp; | |
439 | cp.handle = cpu_to_le16(conn->handle); | |
440 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); | |
441 | } | |
442 | ||
443 | timer: | |
444 | if (hdev->idle_timeout > 0) | |
445 | mod_timer(&conn->idle_timer, | |
446 | jiffies + msecs_to_jiffies(hdev->idle_timeout)); | |
447 | } | |
448 | ||
449 | /* Enter sniff mode */ | |
450 | void hci_conn_enter_sniff_mode(struct hci_conn *conn) | |
451 | { | |
452 | struct hci_dev *hdev = conn->hdev; | |
453 | ||
454 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
455 | ||
456 | if (test_bit(HCI_RAW, &hdev->flags)) | |
457 | return; | |
458 | ||
459 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) | |
460 | return; | |
461 | ||
462 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
463 | return; | |
464 | ||
465 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
466 | struct hci_cp_sniff_subrate cp; | |
467 | cp.handle = cpu_to_le16(conn->handle); | |
468 | cp.max_latency = cpu_to_le16(0); | |
469 | cp.min_remote_timeout = cpu_to_le16(0); | |
470 | cp.min_local_timeout = cpu_to_le16(0); | |
471 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); | |
472 | } | |
473 | ||
474 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend)) { | |
475 | struct hci_cp_sniff_mode cp; | |
476 | cp.handle = cpu_to_le16(conn->handle); | |
477 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
478 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
479 | cp.attempt = cpu_to_le16(4); | |
480 | cp.timeout = cpu_to_le16(1); | |
481 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); | |
482 | } | |
483 | } | |
484 | ||
485 | /* Drop all connection on the device */ | |
486 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
487 | { | |
488 | struct hci_conn_hash *h = &hdev->conn_hash; | |
489 | struct list_head *p; | |
490 | ||
491 | BT_DBG("hdev %s", hdev->name); | |
492 | ||
493 | p = h->list.next; | |
494 | while (p != &h->list) { | |
495 | struct hci_conn *c; | |
496 | ||
497 | c = list_entry(p, struct hci_conn, list); | |
498 | p = p->next; | |
499 | ||
500 | c->state = BT_CLOSED; | |
501 | ||
502 | hci_proto_disconn_ind(c, 0x16); | |
503 | hci_conn_del(c); | |
504 | } | |
505 | } | |
506 | ||
507 | /* Check pending connect attempts */ | |
508 | void hci_conn_check_pending(struct hci_dev *hdev) | |
509 | { | |
510 | struct hci_conn *conn; | |
511 | ||
512 | BT_DBG("hdev %s", hdev->name); | |
513 | ||
514 | hci_dev_lock(hdev); | |
515 | ||
516 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
517 | if (conn) | |
518 | hci_acl_connect(conn); | |
519 | ||
520 | hci_dev_unlock(hdev); | |
521 | } | |
522 | ||
523 | int hci_get_conn_list(void __user *arg) | |
524 | { | |
525 | struct hci_conn_list_req req, *cl; | |
526 | struct hci_conn_info *ci; | |
527 | struct hci_dev *hdev; | |
528 | struct list_head *p; | |
529 | int n = 0, size, err; | |
530 | ||
531 | if (copy_from_user(&req, arg, sizeof(req))) | |
532 | return -EFAULT; | |
533 | ||
534 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
535 | return -EINVAL; | |
536 | ||
537 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
538 | ||
539 | if (!(cl = kmalloc(size, GFP_KERNEL))) | |
540 | return -ENOMEM; | |
541 | ||
542 | if (!(hdev = hci_dev_get(req.dev_id))) { | |
543 | kfree(cl); | |
544 | return -ENODEV; | |
545 | } | |
546 | ||
547 | ci = cl->conn_info; | |
548 | ||
549 | hci_dev_lock_bh(hdev); | |
550 | list_for_each(p, &hdev->conn_hash.list) { | |
551 | register struct hci_conn *c; | |
552 | c = list_entry(p, struct hci_conn, list); | |
553 | ||
554 | bacpy(&(ci + n)->bdaddr, &c->dst); | |
555 | (ci + n)->handle = c->handle; | |
556 | (ci + n)->type = c->type; | |
557 | (ci + n)->out = c->out; | |
558 | (ci + n)->state = c->state; | |
559 | (ci + n)->link_mode = c->link_mode; | |
560 | if (++n >= req.conn_num) | |
561 | break; | |
562 | } | |
563 | hci_dev_unlock_bh(hdev); | |
564 | ||
565 | cl->dev_id = hdev->id; | |
566 | cl->conn_num = n; | |
567 | size = sizeof(req) + n * sizeof(*ci); | |
568 | ||
569 | hci_dev_put(hdev); | |
570 | ||
571 | err = copy_to_user(arg, cl, size); | |
572 | kfree(cl); | |
573 | ||
574 | return err ? -EFAULT : 0; | |
575 | } | |
576 | ||
577 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
578 | { | |
579 | struct hci_conn_info_req req; | |
580 | struct hci_conn_info ci; | |
581 | struct hci_conn *conn; | |
582 | char __user *ptr = arg + sizeof(req); | |
583 | ||
584 | if (copy_from_user(&req, arg, sizeof(req))) | |
585 | return -EFAULT; | |
586 | ||
587 | hci_dev_lock_bh(hdev); | |
588 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); | |
589 | if (conn) { | |
590 | bacpy(&ci.bdaddr, &conn->dst); | |
591 | ci.handle = conn->handle; | |
592 | ci.type = conn->type; | |
593 | ci.out = conn->out; | |
594 | ci.state = conn->state; | |
595 | ci.link_mode = conn->link_mode; | |
596 | } | |
597 | hci_dev_unlock_bh(hdev); | |
598 | ||
599 | if (!conn) | |
600 | return -ENOENT; | |
601 | ||
602 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
603 | } |