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Commit | Line | Data |
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8e87d142 | 1 | /* |
1da177e4 | 2 | BlueZ - Bluetooth protocol stack for Linux |
2d0a0346 | 3 | Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved. |
1da177e4 LT |
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 | |
8e87d142 YH |
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 | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth HCI connection handling. */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/kernel.h> | |
1da177e4 LT |
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> | |
1da177e4 LT |
38 | #include <net/sock.h> |
39 | ||
40 | #include <asm/system.h> | |
70f23020 | 41 | #include <linux/uaccess.h> |
1da177e4 LT |
42 | #include <asm/unaligned.h> |
43 | ||
44 | #include <net/bluetooth/bluetooth.h> | |
45 | #include <net/bluetooth/hci_core.h> | |
46 | ||
fcd89c09 VT |
47 | static void hci_le_connect(struct hci_conn *conn) |
48 | { | |
49 | struct hci_dev *hdev = conn->hdev; | |
50 | struct hci_cp_le_create_conn cp; | |
51 | ||
52 | conn->state = BT_CONNECT; | |
a0c808b3 | 53 | conn->out = true; |
b92a6223 | 54 | conn->link_mode |= HCI_LM_MASTER; |
7b5c0d52 | 55 | conn->sec_level = BT_SECURITY_LOW; |
fcd89c09 VT |
56 | |
57 | memset(&cp, 0, sizeof(cp)); | |
0e833915 AL |
58 | cp.scan_interval = cpu_to_le16(0x0060); |
59 | cp.scan_window = cpu_to_le16(0x0030); | |
fcd89c09 | 60 | bacpy(&cp.peer_addr, &conn->dst); |
6d3ce0e7 | 61 | cp.peer_addr_type = conn->dst_type; |
0e833915 AL |
62 | cp.conn_interval_min = cpu_to_le16(0x0028); |
63 | cp.conn_interval_max = cpu_to_le16(0x0038); | |
64 | cp.supervision_timeout = cpu_to_le16(0x002a); | |
65 | cp.min_ce_len = cpu_to_le16(0x0000); | |
66 | cp.max_ce_len = cpu_to_le16(0x0000); | |
fcd89c09 VT |
67 | |
68 | hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); | |
69 | } | |
70 | ||
71 | static void hci_le_connect_cancel(struct hci_conn *conn) | |
72 | { | |
73 | hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); | |
74 | } | |
75 | ||
4c67bc74 | 76 | void hci_acl_connect(struct hci_conn *conn) |
1da177e4 LT |
77 | { |
78 | struct hci_dev *hdev = conn->hdev; | |
79 | struct inquiry_entry *ie; | |
80 | struct hci_cp_create_conn cp; | |
81 | ||
42d2d87c | 82 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
83 | |
84 | conn->state = BT_CONNECT; | |
a0c808b3 | 85 | conn->out = true; |
a8746417 | 86 | |
1da177e4 LT |
87 | conn->link_mode = HCI_LM_MASTER; |
88 | ||
4c67bc74 MH |
89 | conn->attempt++; |
90 | ||
e4e8e37c MH |
91 | conn->link_policy = hdev->link_policy; |
92 | ||
1da177e4 LT |
93 | memset(&cp, 0, sizeof(cp)); |
94 | bacpy(&cp.bdaddr, &conn->dst); | |
95 | cp.pscan_rep_mode = 0x02; | |
96 | ||
70f23020 AE |
97 | ie = hci_inquiry_cache_lookup(hdev, &conn->dst); |
98 | if (ie) { | |
41a96212 MH |
99 | if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { |
100 | cp.pscan_rep_mode = ie->data.pscan_rep_mode; | |
101 | cp.pscan_mode = ie->data.pscan_mode; | |
102 | cp.clock_offset = ie->data.clock_offset | | |
103 | cpu_to_le16(0x8000); | |
104 | } | |
105 | ||
1da177e4 | 106 | memcpy(conn->dev_class, ie->data.dev_class, 3); |
58a681ef JH |
107 | if (ie->data.ssp_mode > 0) |
108 | set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); | |
1da177e4 LT |
109 | } |
110 | ||
a8746417 | 111 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 112 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) |
b6a0dc82 | 113 | cp.role_switch = 0x01; |
1da177e4 | 114 | else |
b6a0dc82 | 115 | cp.role_switch = 0x00; |
4c67bc74 | 116 | |
a9de9248 | 117 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); |
1da177e4 LT |
118 | } |
119 | ||
6ac59344 MH |
120 | static void hci_acl_connect_cancel(struct hci_conn *conn) |
121 | { | |
122 | struct hci_cp_create_conn_cancel cp; | |
123 | ||
124 | BT_DBG("%p", conn); | |
125 | ||
d095c1eb | 126 | if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2) |
6ac59344 MH |
127 | return; |
128 | ||
129 | bacpy(&cp.bdaddr, &conn->dst); | |
a9de9248 | 130 | hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); |
6ac59344 MH |
131 | } |
132 | ||
1da177e4 LT |
133 | void hci_acl_disconn(struct hci_conn *conn, __u8 reason) |
134 | { | |
135 | struct hci_cp_disconnect cp; | |
136 | ||
137 | BT_DBG("%p", conn); | |
138 | ||
139 | conn->state = BT_DISCONN; | |
140 | ||
aca3192c | 141 | cp.handle = cpu_to_le16(conn->handle); |
1da177e4 | 142 | cp.reason = reason; |
a9de9248 | 143 | hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); |
1da177e4 LT |
144 | } |
145 | ||
146 | void hci_add_sco(struct hci_conn *conn, __u16 handle) | |
147 | { | |
148 | struct hci_dev *hdev = conn->hdev; | |
149 | struct hci_cp_add_sco cp; | |
150 | ||
151 | BT_DBG("%p", conn); | |
152 | ||
153 | conn->state = BT_CONNECT; | |
a0c808b3 | 154 | conn->out = true; |
1da177e4 | 155 | |
efc7688b MH |
156 | conn->attempt++; |
157 | ||
aca3192c | 158 | cp.handle = cpu_to_le16(handle); |
a8746417 | 159 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 160 | |
a9de9248 | 161 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); |
1da177e4 LT |
162 | } |
163 | ||
b6a0dc82 MH |
164 | void hci_setup_sync(struct hci_conn *conn, __u16 handle) |
165 | { | |
166 | struct hci_dev *hdev = conn->hdev; | |
167 | struct hci_cp_setup_sync_conn cp; | |
168 | ||
169 | BT_DBG("%p", conn); | |
170 | ||
171 | conn->state = BT_CONNECT; | |
a0c808b3 | 172 | conn->out = true; |
b6a0dc82 | 173 | |
efc7688b MH |
174 | conn->attempt++; |
175 | ||
b6a0dc82 | 176 | cp.handle = cpu_to_le16(handle); |
a8746417 | 177 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
b6a0dc82 MH |
178 | |
179 | cp.tx_bandwidth = cpu_to_le32(0x00001f40); | |
180 | cp.rx_bandwidth = cpu_to_le32(0x00001f40); | |
181 | cp.max_latency = cpu_to_le16(0xffff); | |
182 | cp.voice_setting = cpu_to_le16(hdev->voice_setting); | |
183 | cp.retrans_effort = 0xff; | |
184 | ||
185 | hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp); | |
186 | } | |
187 | ||
2ce603eb CT |
188 | void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, |
189 | u16 latency, u16 to_multiplier) | |
190 | { | |
191 | struct hci_cp_le_conn_update cp; | |
192 | struct hci_dev *hdev = conn->hdev; | |
193 | ||
194 | memset(&cp, 0, sizeof(cp)); | |
195 | ||
196 | cp.handle = cpu_to_le16(conn->handle); | |
197 | cp.conn_interval_min = cpu_to_le16(min); | |
198 | cp.conn_interval_max = cpu_to_le16(max); | |
199 | cp.conn_latency = cpu_to_le16(latency); | |
200 | cp.supervision_timeout = cpu_to_le16(to_multiplier); | |
201 | cp.min_ce_len = cpu_to_le16(0x0001); | |
202 | cp.max_ce_len = cpu_to_le16(0x0001); | |
203 | ||
204 | hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); | |
205 | } | |
206 | EXPORT_SYMBOL(hci_le_conn_update); | |
207 | ||
a7a595f6 VCG |
208 | void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8], |
209 | __u8 ltk[16]) | |
210 | { | |
211 | struct hci_dev *hdev = conn->hdev; | |
212 | struct hci_cp_le_start_enc cp; | |
213 | ||
214 | BT_DBG("%p", conn); | |
215 | ||
216 | memset(&cp, 0, sizeof(cp)); | |
217 | ||
218 | cp.handle = cpu_to_le16(conn->handle); | |
219 | memcpy(cp.ltk, ltk, sizeof(cp.ltk)); | |
220 | cp.ediv = ediv; | |
51beabdf | 221 | memcpy(cp.rand, rand, sizeof(cp.rand)); |
a7a595f6 VCG |
222 | |
223 | hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); | |
224 | } | |
225 | EXPORT_SYMBOL(hci_le_start_enc); | |
226 | ||
227 | void hci_le_ltk_reply(struct hci_conn *conn, u8 ltk[16]) | |
228 | { | |
229 | struct hci_dev *hdev = conn->hdev; | |
230 | struct hci_cp_le_ltk_reply cp; | |
231 | ||
232 | BT_DBG("%p", conn); | |
233 | ||
234 | memset(&cp, 0, sizeof(cp)); | |
235 | ||
236 | cp.handle = cpu_to_le16(conn->handle); | |
237 | memcpy(cp.ltk, ltk, sizeof(ltk)); | |
238 | ||
239 | hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp); | |
240 | } | |
241 | EXPORT_SYMBOL(hci_le_ltk_reply); | |
242 | ||
243 | void hci_le_ltk_neg_reply(struct hci_conn *conn) | |
244 | { | |
245 | struct hci_dev *hdev = conn->hdev; | |
246 | struct hci_cp_le_ltk_neg_reply cp; | |
247 | ||
248 | BT_DBG("%p", conn); | |
249 | ||
250 | memset(&cp, 0, sizeof(cp)); | |
251 | ||
252 | cp.handle = cpu_to_le16(conn->handle); | |
253 | ||
254 | hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(cp), &cp); | |
255 | } | |
256 | ||
e73439d8 MH |
257 | /* Device _must_ be locked */ |
258 | void hci_sco_setup(struct hci_conn *conn, __u8 status) | |
259 | { | |
260 | struct hci_conn *sco = conn->link; | |
261 | ||
262 | BT_DBG("%p", conn); | |
263 | ||
264 | if (!sco) | |
265 | return; | |
266 | ||
267 | if (!status) { | |
268 | if (lmp_esco_capable(conn->hdev)) | |
269 | hci_setup_sync(sco, conn->handle); | |
270 | else | |
271 | hci_add_sco(sco, conn->handle); | |
272 | } else { | |
273 | hci_proto_connect_cfm(sco, status); | |
274 | hci_conn_del(sco); | |
275 | } | |
276 | } | |
277 | ||
19c40e3b | 278 | static void hci_conn_timeout(struct work_struct *work) |
1da177e4 | 279 | { |
19c40e3b GP |
280 | struct hci_conn *conn = container_of(work, struct hci_conn, |
281 | disc_work.work); | |
2950f21a | 282 | __u8 reason; |
1da177e4 | 283 | |
e05dcc32 | 284 | BT_DBG("conn %p state %s", conn, state_to_string(conn->state)); |
1da177e4 LT |
285 | |
286 | if (atomic_read(&conn->refcnt)) | |
287 | return; | |
288 | ||
6ac59344 MH |
289 | switch (conn->state) { |
290 | case BT_CONNECT: | |
769be974 | 291 | case BT_CONNECT2: |
fcd89c09 VT |
292 | if (conn->out) { |
293 | if (conn->type == ACL_LINK) | |
294 | hci_acl_connect_cancel(conn); | |
295 | else if (conn->type == LE_LINK) | |
296 | hci_le_connect_cancel(conn); | |
297 | } | |
6ac59344 | 298 | break; |
769be974 | 299 | case BT_CONFIG: |
8e87d142 | 300 | case BT_CONNECTED: |
2950f21a MH |
301 | reason = hci_proto_disconn_ind(conn); |
302 | hci_acl_disconn(conn, reason); | |
6ac59344 MH |
303 | break; |
304 | default: | |
1da177e4 | 305 | conn->state = BT_CLOSED; |
6ac59344 MH |
306 | break; |
307 | } | |
1da177e4 LT |
308 | } |
309 | ||
416dc94b GP |
310 | /* Enter sniff mode */ |
311 | static void hci_conn_enter_sniff_mode(struct hci_conn *conn) | |
312 | { | |
313 | struct hci_dev *hdev = conn->hdev; | |
314 | ||
315 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
316 | ||
317 | if (test_bit(HCI_RAW, &hdev->flags)) | |
318 | return; | |
319 | ||
320 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) | |
321 | return; | |
322 | ||
323 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
324 | return; | |
325 | ||
326 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
327 | struct hci_cp_sniff_subrate cp; | |
328 | cp.handle = cpu_to_le16(conn->handle); | |
329 | cp.max_latency = cpu_to_le16(0); | |
330 | cp.min_remote_timeout = cpu_to_le16(0); | |
331 | cp.min_local_timeout = cpu_to_le16(0); | |
332 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); | |
333 | } | |
334 | ||
51a8efd7 | 335 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
416dc94b GP |
336 | struct hci_cp_sniff_mode cp; |
337 | cp.handle = cpu_to_le16(conn->handle); | |
338 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
339 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
340 | cp.attempt = cpu_to_le16(4); | |
341 | cp.timeout = cpu_to_le16(1); | |
342 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); | |
343 | } | |
344 | } | |
345 | ||
04837f64 | 346 | static void hci_conn_idle(unsigned long arg) |
1da177e4 | 347 | { |
04837f64 MH |
348 | struct hci_conn *conn = (void *) arg; |
349 | ||
350 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
351 | ||
352 | hci_conn_enter_sniff_mode(conn); | |
1da177e4 LT |
353 | } |
354 | ||
9f61656a JH |
355 | static void hci_conn_auto_accept(unsigned long arg) |
356 | { | |
357 | struct hci_conn *conn = (void *) arg; | |
358 | struct hci_dev *hdev = conn->hdev; | |
359 | ||
9f61656a JH |
360 | hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), |
361 | &conn->dst); | |
9f61656a JH |
362 | } |
363 | ||
1da177e4 LT |
364 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst) |
365 | { | |
366 | struct hci_conn *conn; | |
367 | ||
368 | BT_DBG("%s dst %s", hdev->name, batostr(dst)); | |
369 | ||
cb601d7e | 370 | conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL); |
04837f64 | 371 | if (!conn) |
1da177e4 | 372 | return NULL; |
1da177e4 LT |
373 | |
374 | bacpy(&conn->dst, dst); | |
a8746417 MH |
375 | conn->hdev = hdev; |
376 | conn->type = type; | |
377 | conn->mode = HCI_CM_ACTIVE; | |
378 | conn->state = BT_OPEN; | |
93f19c9f | 379 | conn->auth_type = HCI_AT_GENERAL_BONDING; |
17fa4b9d | 380 | conn->io_capability = hdev->io_capability; |
a9583556 | 381 | conn->remote_auth = 0xff; |
13d39315 | 382 | conn->key_type = 0xff; |
1da177e4 | 383 | |
58a681ef | 384 | set_bit(HCI_CONN_POWER_SAVE, &conn->flags); |
052b30b0 | 385 | conn->disc_timeout = HCI_DISCONN_TIMEOUT; |
04837f64 | 386 | |
a8746417 MH |
387 | switch (type) { |
388 | case ACL_LINK: | |
389 | conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; | |
390 | break; | |
391 | case SCO_LINK: | |
392 | if (lmp_esco_capable(hdev)) | |
efc7688b MH |
393 | conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | |
394 | (hdev->esco_type & EDR_ESCO_MASK); | |
a8746417 MH |
395 | else |
396 | conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; | |
397 | break; | |
398 | case ESCO_LINK: | |
efc7688b | 399 | conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; |
a8746417 MH |
400 | break; |
401 | } | |
402 | ||
1da177e4 | 403 | skb_queue_head_init(&conn->data_q); |
04837f64 | 404 | |
2c33c06a | 405 | INIT_LIST_HEAD(&conn->chan_list);; |
73d80deb | 406 | |
19c40e3b | 407 | INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout); |
b24b8a24 | 408 | setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn); |
9f61656a JH |
409 | setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept, |
410 | (unsigned long) conn); | |
1da177e4 LT |
411 | |
412 | atomic_set(&conn->refcnt, 0); | |
413 | ||
414 | hci_dev_hold(hdev); | |
415 | ||
1da177e4 | 416 | hci_conn_hash_add(hdev, conn); |
3c54711c | 417 | if (hdev->notify) |
1da177e4 LT |
418 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); |
419 | ||
9eba32b8 MH |
420 | atomic_set(&conn->devref, 0); |
421 | ||
a67e899c MH |
422 | hci_conn_init_sysfs(conn); |
423 | ||
1da177e4 LT |
424 | return conn; |
425 | } | |
426 | ||
427 | int hci_conn_del(struct hci_conn *conn) | |
428 | { | |
429 | struct hci_dev *hdev = conn->hdev; | |
430 | ||
431 | BT_DBG("%s conn %p handle %d", hdev->name, conn, conn->handle); | |
432 | ||
04837f64 MH |
433 | del_timer(&conn->idle_timer); |
434 | ||
19c40e3b | 435 | cancel_delayed_work_sync(&conn->disc_work); |
1da177e4 | 436 | |
9f61656a JH |
437 | del_timer(&conn->auto_accept_timer); |
438 | ||
5b7f9909 | 439 | if (conn->type == ACL_LINK) { |
1da177e4 LT |
440 | struct hci_conn *sco = conn->link; |
441 | if (sco) | |
442 | sco->link = NULL; | |
443 | ||
444 | /* Unacked frames */ | |
445 | hdev->acl_cnt += conn->sent; | |
6ed58ec5 VT |
446 | } else if (conn->type == LE_LINK) { |
447 | if (hdev->le_pkts) | |
448 | hdev->le_cnt += conn->sent; | |
449 | else | |
450 | hdev->acl_cnt += conn->sent; | |
5b7f9909 MH |
451 | } else { |
452 | struct hci_conn *acl = conn->link; | |
453 | if (acl) { | |
454 | acl->link = NULL; | |
455 | hci_conn_put(acl); | |
456 | } | |
1da177e4 LT |
457 | } |
458 | ||
7d0db0a3 | 459 | |
2c33c06a | 460 | hci_chan_list_flush(conn); |
73d80deb | 461 | |
1da177e4 | 462 | hci_conn_hash_del(hdev, conn); |
3c54711c | 463 | if (hdev->notify) |
1da177e4 | 464 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); |
7d0db0a3 | 465 | |
1da177e4 | 466 | skb_queue_purge(&conn->data_q); |
1da177e4 | 467 | |
9eba32b8 | 468 | hci_conn_put_device(conn); |
2ae9a6be | 469 | |
384943ec MH |
470 | hci_dev_put(hdev); |
471 | ||
163f4dab TT |
472 | if (conn->handle == 0) |
473 | kfree(conn); | |
474 | ||
1da177e4 LT |
475 | return 0; |
476 | } | |
477 | ||
478 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
479 | { | |
480 | int use_src = bacmp(src, BDADDR_ANY); | |
8035ded4 | 481 | struct hci_dev *hdev = NULL, *d; |
1da177e4 LT |
482 | |
483 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
484 | ||
f20d09d5 | 485 | read_lock(&hci_dev_list_lock); |
1da177e4 | 486 | |
8035ded4 | 487 | list_for_each_entry(d, &hci_dev_list, list) { |
1da177e4 LT |
488 | if (!test_bit(HCI_UP, &d->flags) || test_bit(HCI_RAW, &d->flags)) |
489 | continue; | |
490 | ||
8e87d142 | 491 | /* Simple routing: |
1da177e4 LT |
492 | * No source address - find interface with bdaddr != dst |
493 | * Source address - find interface with bdaddr == src | |
494 | */ | |
495 | ||
496 | if (use_src) { | |
497 | if (!bacmp(&d->bdaddr, src)) { | |
498 | hdev = d; break; | |
499 | } | |
500 | } else { | |
501 | if (bacmp(&d->bdaddr, dst)) { | |
502 | hdev = d; break; | |
503 | } | |
504 | } | |
505 | } | |
506 | ||
507 | if (hdev) | |
508 | hdev = hci_dev_hold(hdev); | |
509 | ||
f20d09d5 | 510 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
511 | return hdev; |
512 | } | |
513 | EXPORT_SYMBOL(hci_get_route); | |
514 | ||
fcd89c09 | 515 | /* Create SCO, ACL or LE connection. |
1da177e4 | 516 | * Device _must_ be locked */ |
8c1b2355 | 517 | struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, __u8 sec_level, __u8 auth_type) |
1da177e4 LT |
518 | { |
519 | struct hci_conn *acl; | |
5b7f9909 | 520 | struct hci_conn *sco; |
fcd89c09 | 521 | struct hci_conn *le; |
1da177e4 LT |
522 | |
523 | BT_DBG("%s dst %s", hdev->name, batostr(dst)); | |
524 | ||
fcd89c09 | 525 | if (type == LE_LINK) { |
eda42b50 AG |
526 | struct adv_entry *entry; |
527 | ||
fcd89c09 | 528 | le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); |
15c4794f | 529 | if (le) |
30e76272 | 530 | return ERR_PTR(-EBUSY); |
eda42b50 AG |
531 | |
532 | entry = hci_find_adv_entry(hdev, dst); | |
533 | if (!entry) | |
534 | return ERR_PTR(-EHOSTUNREACH); | |
535 | ||
15c4794f | 536 | le = hci_conn_add(hdev, LE_LINK, dst); |
fcd89c09 | 537 | if (!le) |
30e76272 | 538 | return ERR_PTR(-ENOMEM); |
893d6751 | 539 | |
eda42b50 AG |
540 | le->dst_type = entry->bdaddr_type; |
541 | ||
893d6751 | 542 | hci_le_connect(le); |
fcd89c09 VT |
543 | |
544 | hci_conn_hold(le); | |
545 | ||
546 | return le; | |
547 | } | |
548 | ||
70f23020 AE |
549 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
550 | if (!acl) { | |
551 | acl = hci_conn_add(hdev, ACL_LINK, dst); | |
552 | if (!acl) | |
48c7aba9 | 553 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
554 | } |
555 | ||
556 | hci_conn_hold(acl); | |
557 | ||
09ab6f4c | 558 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
559 | acl->sec_level = BT_SECURITY_LOW; |
560 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 561 | acl->auth_type = auth_type; |
1da177e4 | 562 | hci_acl_connect(acl); |
09ab6f4c | 563 | } |
1da177e4 | 564 | |
5b7f9909 MH |
565 | if (type == ACL_LINK) |
566 | return acl; | |
1da177e4 | 567 | |
70f23020 AE |
568 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
569 | if (!sco) { | |
570 | sco = hci_conn_add(hdev, type, dst); | |
571 | if (!sco) { | |
5b7f9909 | 572 | hci_conn_put(acl); |
48c7aba9 | 573 | return ERR_PTR(-ENOMEM); |
1da177e4 | 574 | } |
5b7f9909 | 575 | } |
1da177e4 | 576 | |
5b7f9909 MH |
577 | acl->link = sco; |
578 | sco->link = acl; | |
1da177e4 | 579 | |
5b7f9909 | 580 | hci_conn_hold(sco); |
1da177e4 | 581 | |
5b7f9909 | 582 | if (acl->state == BT_CONNECTED && |
b6a0dc82 | 583 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
58a681ef | 584 | set_bit(HCI_CONN_POWER_SAVE, &acl->flags); |
14b12d0b | 585 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 586 | |
51a8efd7 | 587 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { |
e73439d8 | 588 | /* defer SCO setup until mode change completed */ |
51a8efd7 | 589 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); |
e73439d8 MH |
590 | return sco; |
591 | } | |
592 | ||
593 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 594 | } |
5b7f9909 MH |
595 | |
596 | return sco; | |
1da177e4 LT |
597 | } |
598 | EXPORT_SYMBOL(hci_connect); | |
599 | ||
e7c29cb1 MH |
600 | /* Check link security requirement */ |
601 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
602 | { | |
603 | BT_DBG("conn %p", conn); | |
604 | ||
aa64a8b5 | 605 | if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT)) |
e7c29cb1 MH |
606 | return 0; |
607 | ||
608 | return 1; | |
609 | } | |
610 | EXPORT_SYMBOL(hci_conn_check_link_mode); | |
611 | ||
1da177e4 | 612 | /* Authenticate remote device */ |
0684e5f9 | 613 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 LT |
614 | { |
615 | BT_DBG("conn %p", conn); | |
616 | ||
765c2a96 JH |
617 | if (conn->pending_sec_level > sec_level) |
618 | sec_level = conn->pending_sec_level; | |
619 | ||
96a31833 | 620 | if (sec_level > conn->sec_level) |
765c2a96 | 621 | conn->pending_sec_level = sec_level; |
96a31833 | 622 | else if (conn->link_mode & HCI_LM_AUTH) |
1da177e4 LT |
623 | return 1; |
624 | ||
65cf686e JH |
625 | /* Make sure we preserve an existing MITM requirement*/ |
626 | auth_type |= (conn->auth_type & 0x01); | |
627 | ||
96a31833 MH |
628 | conn->auth_type = auth_type; |
629 | ||
51a8efd7 | 630 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 631 | struct hci_cp_auth_requested cp; |
b7d05bad PH |
632 | |
633 | /* encrypt must be pending if auth is also pending */ | |
634 | set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); | |
635 | ||
aca3192c | 636 | cp.handle = cpu_to_le16(conn->handle); |
40be492f MH |
637 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
638 | sizeof(cp), &cp); | |
19f8def0 | 639 | if (conn->key_type != 0xff) |
51a8efd7 | 640 | set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); |
1da177e4 | 641 | } |
8c1b2355 | 642 | |
1da177e4 LT |
643 | return 0; |
644 | } | |
1da177e4 | 645 | |
13d39315 WR |
646 | /* Encrypt the the link */ |
647 | static void hci_conn_encrypt(struct hci_conn *conn) | |
648 | { | |
649 | BT_DBG("conn %p", conn); | |
650 | ||
51a8efd7 | 651 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { |
13d39315 WR |
652 | struct hci_cp_set_conn_encrypt cp; |
653 | cp.handle = cpu_to_le16(conn->handle); | |
654 | cp.encrypt = 0x01; | |
655 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
656 | &cp); | |
657 | } | |
658 | } | |
659 | ||
8c1b2355 | 660 | /* Enable security */ |
0684e5f9 | 661 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 LT |
662 | { |
663 | BT_DBG("conn %p", conn); | |
664 | ||
13d39315 | 665 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
666 | if (sec_level == BT_SECURITY_SDP) |
667 | return 1; | |
668 | ||
13d39315 WR |
669 | /* For non 2.1 devices and low security level we don't need the link |
670 | key. */ | |
aa64a8b5 | 671 | if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) |
3fdca1e1 | 672 | return 1; |
8c1b2355 | 673 | |
13d39315 WR |
674 | /* For other security levels we need the link key. */ |
675 | if (!(conn->link_mode & HCI_LM_AUTH)) | |
676 | goto auth; | |
677 | ||
678 | /* An authenticated combination key has sufficient security for any | |
679 | security level. */ | |
680 | if (conn->key_type == HCI_LK_AUTH_COMBINATION) | |
681 | goto encrypt; | |
682 | ||
683 | /* An unauthenticated combination key has sufficient security for | |
684 | security level 1 and 2. */ | |
685 | if (conn->key_type == HCI_LK_UNAUTH_COMBINATION && | |
686 | (sec_level == BT_SECURITY_MEDIUM || | |
687 | sec_level == BT_SECURITY_LOW)) | |
688 | goto encrypt; | |
689 | ||
690 | /* A combination key has always sufficient security for the security | |
691 | levels 1 or 2. High security level requires the combination key | |
692 | is generated using maximum PIN code length (16). | |
693 | For pre 2.1 units. */ | |
694 | if (conn->key_type == HCI_LK_COMBINATION && | |
695 | (sec_level != BT_SECURITY_HIGH || | |
696 | conn->pin_length == 16)) | |
697 | goto encrypt; | |
698 | ||
699 | auth: | |
51a8efd7 | 700 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) |
1da177e4 LT |
701 | return 0; |
702 | ||
6fdf658c LAD |
703 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
704 | return 0; | |
13d39315 WR |
705 | |
706 | encrypt: | |
707 | if (conn->link_mode & HCI_LM_ENCRYPT) | |
708 | return 1; | |
8c1b2355 | 709 | |
13d39315 | 710 | hci_conn_encrypt(conn); |
1da177e4 LT |
711 | return 0; |
712 | } | |
8c1b2355 | 713 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 714 | |
b3b1b061 WR |
715 | /* Check secure link requirement */ |
716 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
717 | { | |
718 | BT_DBG("conn %p", conn); | |
719 | ||
720 | if (sec_level != BT_SECURITY_HIGH) | |
721 | return 1; /* Accept if non-secure is required */ | |
722 | ||
ef4177e2 | 723 | if (conn->sec_level == BT_SECURITY_HIGH) |
b3b1b061 WR |
724 | return 1; |
725 | ||
726 | return 0; /* Reject not secure link */ | |
727 | } | |
728 | EXPORT_SYMBOL(hci_conn_check_secure); | |
729 | ||
1da177e4 LT |
730 | /* Change link key */ |
731 | int hci_conn_change_link_key(struct hci_conn *conn) | |
732 | { | |
733 | BT_DBG("conn %p", conn); | |
734 | ||
51a8efd7 | 735 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 736 | struct hci_cp_change_conn_link_key cp; |
aca3192c | 737 | cp.handle = cpu_to_le16(conn->handle); |
40be492f MH |
738 | hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY, |
739 | sizeof(cp), &cp); | |
1da177e4 | 740 | } |
8c1b2355 | 741 | |
1da177e4 LT |
742 | return 0; |
743 | } | |
744 | EXPORT_SYMBOL(hci_conn_change_link_key); | |
745 | ||
746 | /* Switch role */ | |
8c1b2355 | 747 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 LT |
748 | { |
749 | BT_DBG("conn %p", conn); | |
750 | ||
751 | if (!role && conn->link_mode & HCI_LM_MASTER) | |
752 | return 1; | |
753 | ||
51a8efd7 | 754 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { |
1da177e4 LT |
755 | struct hci_cp_switch_role cp; |
756 | bacpy(&cp.bdaddr, &conn->dst); | |
757 | cp.role = role; | |
a9de9248 | 758 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 759 | } |
8c1b2355 | 760 | |
1da177e4 LT |
761 | return 0; |
762 | } | |
763 | EXPORT_SYMBOL(hci_conn_switch_role); | |
764 | ||
04837f64 | 765 | /* Enter active mode */ |
14b12d0b | 766 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
767 | { |
768 | struct hci_dev *hdev = conn->hdev; | |
769 | ||
770 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
771 | ||
772 | if (test_bit(HCI_RAW, &hdev->flags)) | |
773 | return; | |
774 | ||
14b12d0b JG |
775 | if (conn->mode != HCI_CM_SNIFF) |
776 | goto timer; | |
777 | ||
58a681ef | 778 | if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) |
04837f64 MH |
779 | goto timer; |
780 | ||
51a8efd7 | 781 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
04837f64 | 782 | struct hci_cp_exit_sniff_mode cp; |
aca3192c | 783 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 784 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
785 | } |
786 | ||
787 | timer: | |
788 | if (hdev->idle_timeout > 0) | |
789 | mod_timer(&conn->idle_timer, | |
790 | jiffies + msecs_to_jiffies(hdev->idle_timeout)); | |
791 | } | |
792 | ||
1da177e4 LT |
793 | /* Drop all connection on the device */ |
794 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
795 | { | |
796 | struct hci_conn_hash *h = &hdev->conn_hash; | |
3c4e0df0 | 797 | struct hci_conn *c, *n; |
1da177e4 LT |
798 | |
799 | BT_DBG("hdev %s", hdev->name); | |
800 | ||
3c4e0df0 | 801 | list_for_each_entry_safe(c, n, &h->list, list) { |
1da177e4 LT |
802 | c->state = BT_CLOSED; |
803 | ||
9f5a0d7b | 804 | hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); |
1da177e4 LT |
805 | hci_conn_del(c); |
806 | } | |
807 | } | |
808 | ||
a9de9248 MH |
809 | /* Check pending connect attempts */ |
810 | void hci_conn_check_pending(struct hci_dev *hdev) | |
811 | { | |
812 | struct hci_conn *conn; | |
813 | ||
814 | BT_DBG("hdev %s", hdev->name); | |
815 | ||
816 | hci_dev_lock(hdev); | |
817 | ||
818 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
819 | if (conn) | |
820 | hci_acl_connect(conn); | |
821 | ||
822 | hci_dev_unlock(hdev); | |
823 | } | |
824 | ||
9eba32b8 MH |
825 | void hci_conn_hold_device(struct hci_conn *conn) |
826 | { | |
827 | atomic_inc(&conn->devref); | |
828 | } | |
829 | EXPORT_SYMBOL(hci_conn_hold_device); | |
830 | ||
831 | void hci_conn_put_device(struct hci_conn *conn) | |
832 | { | |
833 | if (atomic_dec_and_test(&conn->devref)) | |
834 | hci_conn_del_sysfs(conn); | |
835 | } | |
836 | EXPORT_SYMBOL(hci_conn_put_device); | |
837 | ||
1da177e4 LT |
838 | int hci_get_conn_list(void __user *arg) |
839 | { | |
8035ded4 | 840 | register struct hci_conn *c; |
1da177e4 LT |
841 | struct hci_conn_list_req req, *cl; |
842 | struct hci_conn_info *ci; | |
843 | struct hci_dev *hdev; | |
1da177e4 LT |
844 | int n = 0, size, err; |
845 | ||
846 | if (copy_from_user(&req, arg, sizeof(req))) | |
847 | return -EFAULT; | |
848 | ||
849 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
850 | return -EINVAL; | |
851 | ||
852 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
853 | ||
70f23020 AE |
854 | cl = kmalloc(size, GFP_KERNEL); |
855 | if (!cl) | |
1da177e4 LT |
856 | return -ENOMEM; |
857 | ||
70f23020 AE |
858 | hdev = hci_dev_get(req.dev_id); |
859 | if (!hdev) { | |
1da177e4 LT |
860 | kfree(cl); |
861 | return -ENODEV; | |
862 | } | |
863 | ||
864 | ci = cl->conn_info; | |
865 | ||
09fd0de5 | 866 | hci_dev_lock(hdev); |
8035ded4 | 867 | list_for_each_entry(c, &hdev->conn_hash.list, list) { |
1da177e4 LT |
868 | bacpy(&(ci + n)->bdaddr, &c->dst); |
869 | (ci + n)->handle = c->handle; | |
870 | (ci + n)->type = c->type; | |
871 | (ci + n)->out = c->out; | |
872 | (ci + n)->state = c->state; | |
873 | (ci + n)->link_mode = c->link_mode; | |
874 | if (++n >= req.conn_num) | |
875 | break; | |
876 | } | |
09fd0de5 | 877 | hci_dev_unlock(hdev); |
1da177e4 LT |
878 | |
879 | cl->dev_id = hdev->id; | |
880 | cl->conn_num = n; | |
881 | size = sizeof(req) + n * sizeof(*ci); | |
882 | ||
883 | hci_dev_put(hdev); | |
884 | ||
885 | err = copy_to_user(arg, cl, size); | |
886 | kfree(cl); | |
887 | ||
888 | return err ? -EFAULT : 0; | |
889 | } | |
890 | ||
891 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
892 | { | |
893 | struct hci_conn_info_req req; | |
894 | struct hci_conn_info ci; | |
895 | struct hci_conn *conn; | |
896 | char __user *ptr = arg + sizeof(req); | |
897 | ||
898 | if (copy_from_user(&req, arg, sizeof(req))) | |
899 | return -EFAULT; | |
900 | ||
09fd0de5 | 901 | hci_dev_lock(hdev); |
1da177e4 LT |
902 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); |
903 | if (conn) { | |
904 | bacpy(&ci.bdaddr, &conn->dst); | |
905 | ci.handle = conn->handle; | |
906 | ci.type = conn->type; | |
907 | ci.out = conn->out; | |
908 | ci.state = conn->state; | |
909 | ci.link_mode = conn->link_mode; | |
910 | } | |
09fd0de5 | 911 | hci_dev_unlock(hdev); |
1da177e4 LT |
912 | |
913 | if (!conn) | |
914 | return -ENOENT; | |
915 | ||
916 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
917 | } | |
40be492f MH |
918 | |
919 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
920 | { | |
921 | struct hci_auth_info_req req; | |
922 | struct hci_conn *conn; | |
923 | ||
924 | if (copy_from_user(&req, arg, sizeof(req))) | |
925 | return -EFAULT; | |
926 | ||
09fd0de5 | 927 | hci_dev_lock(hdev); |
40be492f MH |
928 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); |
929 | if (conn) | |
930 | req.type = conn->auth_type; | |
09fd0de5 | 931 | hci_dev_unlock(hdev); |
40be492f MH |
932 | |
933 | if (!conn) | |
934 | return -ENOENT; | |
935 | ||
936 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
937 | } | |
73d80deb LAD |
938 | |
939 | struct hci_chan *hci_chan_create(struct hci_conn *conn) | |
940 | { | |
941 | struct hci_dev *hdev = conn->hdev; | |
942 | struct hci_chan *chan; | |
943 | ||
944 | BT_DBG("%s conn %p", hdev->name, conn); | |
945 | ||
75d7735c | 946 | chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL); |
73d80deb LAD |
947 | if (!chan) |
948 | return NULL; | |
949 | ||
950 | chan->conn = conn; | |
951 | skb_queue_head_init(&chan->data_q); | |
952 | ||
8192edef | 953 | list_add_rcu(&chan->list, &conn->chan_list); |
73d80deb LAD |
954 | |
955 | return chan; | |
956 | } | |
957 | ||
958 | int hci_chan_del(struct hci_chan *chan) | |
959 | { | |
960 | struct hci_conn *conn = chan->conn; | |
961 | struct hci_dev *hdev = conn->hdev; | |
962 | ||
963 | BT_DBG("%s conn %p chan %p", hdev->name, conn, chan); | |
964 | ||
8192edef GP |
965 | list_del_rcu(&chan->list); |
966 | ||
967 | synchronize_rcu(); | |
73d80deb LAD |
968 | |
969 | skb_queue_purge(&chan->data_q); | |
970 | kfree(chan); | |
971 | ||
972 | return 0; | |
973 | } | |
974 | ||
2c33c06a | 975 | void hci_chan_list_flush(struct hci_conn *conn) |
73d80deb | 976 | { |
2a5a5ec6 | 977 | struct hci_chan *chan, *n; |
73d80deb LAD |
978 | |
979 | BT_DBG("conn %p", conn); | |
980 | ||
2a5a5ec6 | 981 | list_for_each_entry_safe(chan, n, &conn->chan_list, list) |
73d80deb LAD |
982 | hci_chan_del(chan); |
983 | } |