Commit | Line | Data |
---|---|---|
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 | ||
8c520a59 | 27 | #include <linux/export.h> |
1da177e4 LT |
28 | |
29 | #include <net/bluetooth/bluetooth.h> | |
30 | #include <net/bluetooth/hci_core.h> | |
4bc58f51 | 31 | #include <net/bluetooth/l2cap.h> |
1da177e4 | 32 | |
ac4b7236 | 33 | #include "smp.h" |
7024728e MH |
34 | #include "a2mp.h" |
35 | ||
2dea632f FD |
36 | struct sco_param { |
37 | u16 pkt_type; | |
38 | u16 max_latency; | |
c7da5797 | 39 | u8 retrans_effort; |
2dea632f FD |
40 | }; |
41 | ||
48e68ff5 | 42 | static const struct sco_param esco_param_cvsd[] = { |
c7da5797 JH |
43 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a, 0x01 }, /* S3 */ |
44 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007, 0x01 }, /* S2 */ | |
45 | { EDR_ESCO_MASK | ESCO_EV3, 0x0007, 0x01 }, /* S1 */ | |
46 | { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0x01 }, /* D1 */ | |
47 | { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0x01 }, /* D0 */ | |
2dea632f FD |
48 | }; |
49 | ||
48e68ff5 | 50 | static const struct sco_param sco_param_cvsd[] = { |
c7da5797 JH |
51 | { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0xff }, /* D1 */ |
52 | { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0xff }, /* D0 */ | |
48e68ff5 BT |
53 | }; |
54 | ||
565766b0 | 55 | static const struct sco_param esco_param_msbc[] = { |
c7da5797 JH |
56 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d, 0x02 }, /* T2 */ |
57 | { EDR_ESCO_MASK | ESCO_EV3, 0x0008, 0x02 }, /* T1 */ | |
2dea632f FD |
58 | }; |
59 | ||
1aef8669 | 60 | static void hci_le_create_connection_cancel(struct hci_conn *conn) |
fcd89c09 VT |
61 | { |
62 | hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); | |
63 | } | |
64 | ||
1aef8669 | 65 | static void hci_acl_create_connection(struct hci_conn *conn) |
1da177e4 LT |
66 | { |
67 | struct hci_dev *hdev = conn->hdev; | |
68 | struct inquiry_entry *ie; | |
69 | struct hci_cp_create_conn cp; | |
70 | ||
42d2d87c | 71 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
72 | |
73 | conn->state = BT_CONNECT; | |
a0c808b3 | 74 | conn->out = true; |
40bef302 | 75 | conn->role = HCI_ROLE_MASTER; |
1da177e4 | 76 | |
4c67bc74 MH |
77 | conn->attempt++; |
78 | ||
e4e8e37c MH |
79 | conn->link_policy = hdev->link_policy; |
80 | ||
1da177e4 LT |
81 | memset(&cp, 0, sizeof(cp)); |
82 | bacpy(&cp.bdaddr, &conn->dst); | |
83 | cp.pscan_rep_mode = 0x02; | |
84 | ||
70f23020 AE |
85 | ie = hci_inquiry_cache_lookup(hdev, &conn->dst); |
86 | if (ie) { | |
41a96212 MH |
87 | if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { |
88 | cp.pscan_rep_mode = ie->data.pscan_rep_mode; | |
89 | cp.pscan_mode = ie->data.pscan_mode; | |
90 | cp.clock_offset = ie->data.clock_offset | | |
dcf4adbf | 91 | cpu_to_le16(0x8000); |
41a96212 MH |
92 | } |
93 | ||
1da177e4 | 94 | memcpy(conn->dev_class, ie->data.dev_class, 3); |
58a681ef JH |
95 | if (ie->data.ssp_mode > 0) |
96 | set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); | |
1da177e4 LT |
97 | } |
98 | ||
a8746417 | 99 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 100 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) |
b6a0dc82 | 101 | cp.role_switch = 0x01; |
1da177e4 | 102 | else |
b6a0dc82 | 103 | cp.role_switch = 0x00; |
4c67bc74 | 104 | |
a9de9248 | 105 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); |
1da177e4 LT |
106 | } |
107 | ||
1aef8669 | 108 | static void hci_acl_create_connection_cancel(struct hci_conn *conn) |
6ac59344 MH |
109 | { |
110 | struct hci_cp_create_conn_cancel cp; | |
111 | ||
38b3fef1 | 112 | BT_DBG("hcon %p", conn); |
6ac59344 | 113 | |
d095c1eb | 114 | if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2) |
6ac59344 MH |
115 | return; |
116 | ||
117 | bacpy(&cp.bdaddr, &conn->dst); | |
a9de9248 | 118 | hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); |
6ac59344 MH |
119 | } |
120 | ||
93796fa6 CT |
121 | static void hci_reject_sco(struct hci_conn *conn) |
122 | { | |
123 | struct hci_cp_reject_sync_conn_req cp; | |
124 | ||
d41c15cf | 125 | cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES; |
93796fa6 CT |
126 | bacpy(&cp.bdaddr, &conn->dst); |
127 | ||
128 | hci_send_cmd(conn->hdev, HCI_OP_REJECT_SYNC_CONN_REQ, sizeof(cp), &cp); | |
129 | } | |
130 | ||
e3b679d5 | 131 | int hci_disconnect(struct hci_conn *conn, __u8 reason) |
1da177e4 LT |
132 | { |
133 | struct hci_cp_disconnect cp; | |
134 | ||
38b3fef1 | 135 | BT_DBG("hcon %p", conn); |
1da177e4 | 136 | |
839035a7 JH |
137 | /* When we are master of an established connection and it enters |
138 | * the disconnect timeout, then go ahead and try to read the | |
139 | * current clock offset. Processing of the result is done | |
140 | * within the event handling and hci_clock_offset_evt function. | |
141 | */ | |
142 | if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER) { | |
143 | struct hci_dev *hdev = conn->hdev; | |
4f639ede | 144 | struct hci_cp_read_clock_offset clkoff_cp; |
839035a7 | 145 | |
4f639ede FF |
146 | clkoff_cp.handle = cpu_to_le16(conn->handle); |
147 | hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp), | |
148 | &clkoff_cp); | |
839035a7 JH |
149 | } |
150 | ||
1da177e4 LT |
151 | conn->state = BT_DISCONN; |
152 | ||
aca3192c | 153 | cp.handle = cpu_to_le16(conn->handle); |
1da177e4 | 154 | cp.reason = reason; |
e3b679d5 | 155 | return hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); |
1da177e4 LT |
156 | } |
157 | ||
a2b1976b | 158 | static void hci_amp_disconn(struct hci_conn *conn) |
53502d69 AE |
159 | { |
160 | struct hci_cp_disconn_phy_link cp; | |
161 | ||
162 | BT_DBG("hcon %p", conn); | |
163 | ||
164 | conn->state = BT_DISCONN; | |
165 | ||
166 | cp.phy_handle = HCI_PHY_HANDLE(conn->handle); | |
a2b1976b | 167 | cp.reason = hci_proto_disconn_ind(conn); |
53502d69 AE |
168 | hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK, |
169 | sizeof(cp), &cp); | |
170 | } | |
171 | ||
57f5d0d1 | 172 | static void hci_add_sco(struct hci_conn *conn, __u16 handle) |
1da177e4 LT |
173 | { |
174 | struct hci_dev *hdev = conn->hdev; | |
175 | struct hci_cp_add_sco cp; | |
176 | ||
38b3fef1 | 177 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
178 | |
179 | conn->state = BT_CONNECT; | |
a0c808b3 | 180 | conn->out = true; |
1da177e4 | 181 | |
efc7688b MH |
182 | conn->attempt++; |
183 | ||
aca3192c | 184 | cp.handle = cpu_to_le16(handle); |
a8746417 | 185 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 186 | |
a9de9248 | 187 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); |
1da177e4 LT |
188 | } |
189 | ||
2dea632f | 190 | bool hci_setup_sync(struct hci_conn *conn, __u16 handle) |
b6a0dc82 MH |
191 | { |
192 | struct hci_dev *hdev = conn->hdev; | |
193 | struct hci_cp_setup_sync_conn cp; | |
2dea632f | 194 | const struct sco_param *param; |
b6a0dc82 | 195 | |
38b3fef1 | 196 | BT_DBG("hcon %p", conn); |
b6a0dc82 MH |
197 | |
198 | conn->state = BT_CONNECT; | |
a0c808b3 | 199 | conn->out = true; |
b6a0dc82 | 200 | |
efc7688b MH |
201 | conn->attempt++; |
202 | ||
b6a0dc82 | 203 | cp.handle = cpu_to_le16(handle); |
b6a0dc82 | 204 | |
dcf4adbf JP |
205 | cp.tx_bandwidth = cpu_to_le32(0x00001f40); |
206 | cp.rx_bandwidth = cpu_to_le32(0x00001f40); | |
10c62ddc FD |
207 | cp.voice_setting = cpu_to_le16(conn->setting); |
208 | ||
209 | switch (conn->setting & SCO_AIRMODE_MASK) { | |
210 | case SCO_AIRMODE_TRANSP: | |
565766b0 | 211 | if (conn->attempt > ARRAY_SIZE(esco_param_msbc)) |
2dea632f | 212 | return false; |
565766b0 | 213 | param = &esco_param_msbc[conn->attempt - 1]; |
10c62ddc FD |
214 | break; |
215 | case SCO_AIRMODE_CVSD: | |
48e68ff5 BT |
216 | if (lmp_esco_capable(conn->link)) { |
217 | if (conn->attempt > ARRAY_SIZE(esco_param_cvsd)) | |
218 | return false; | |
48e68ff5 BT |
219 | param = &esco_param_cvsd[conn->attempt - 1]; |
220 | } else { | |
221 | if (conn->attempt > ARRAY_SIZE(sco_param_cvsd)) | |
222 | return false; | |
48e68ff5 BT |
223 | param = &sco_param_cvsd[conn->attempt - 1]; |
224 | } | |
10c62ddc | 225 | break; |
2dea632f FD |
226 | default: |
227 | return false; | |
10c62ddc | 228 | } |
b6a0dc82 | 229 | |
c7da5797 | 230 | cp.retrans_effort = param->retrans_effort; |
2dea632f FD |
231 | cp.pkt_type = __cpu_to_le16(param->pkt_type); |
232 | cp.max_latency = __cpu_to_le16(param->max_latency); | |
233 | ||
234 | if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0) | |
235 | return false; | |
236 | ||
237 | return true; | |
b6a0dc82 MH |
238 | } |
239 | ||
7d6ca693 JH |
240 | u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency, |
241 | u16 to_multiplier) | |
2ce603eb | 242 | { |
2ce603eb | 243 | struct hci_dev *hdev = conn->hdev; |
f044eb05 MH |
244 | struct hci_conn_params *params; |
245 | struct hci_cp_le_conn_update cp; | |
2ce603eb | 246 | |
f044eb05 | 247 | hci_dev_lock(hdev); |
2ce603eb | 248 | |
f044eb05 MH |
249 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); |
250 | if (params) { | |
251 | params->conn_min_interval = min; | |
252 | params->conn_max_interval = max; | |
253 | params->conn_latency = latency; | |
254 | params->supervision_timeout = to_multiplier; | |
255 | } | |
256 | ||
257 | hci_dev_unlock(hdev); | |
258 | ||
259 | memset(&cp, 0, sizeof(cp)); | |
2ce603eb CT |
260 | cp.handle = cpu_to_le16(conn->handle); |
261 | cp.conn_interval_min = cpu_to_le16(min); | |
262 | cp.conn_interval_max = cpu_to_le16(max); | |
263 | cp.conn_latency = cpu_to_le16(latency); | |
264 | cp.supervision_timeout = cpu_to_le16(to_multiplier); | |
dcf4adbf JP |
265 | cp.min_ce_len = cpu_to_le16(0x0000); |
266 | cp.max_ce_len = cpu_to_le16(0x0000); | |
2ce603eb CT |
267 | |
268 | hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); | |
7d6ca693 JH |
269 | |
270 | if (params) | |
271 | return 0x01; | |
272 | ||
273 | return 0x00; | |
2ce603eb | 274 | } |
2ce603eb | 275 | |
fe39c7b2 | 276 | void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand, |
5974e4c4 | 277 | __u8 ltk[16]) |
a7a595f6 VCG |
278 | { |
279 | struct hci_dev *hdev = conn->hdev; | |
280 | struct hci_cp_le_start_enc cp; | |
281 | ||
38b3fef1 | 282 | BT_DBG("hcon %p", conn); |
a7a595f6 VCG |
283 | |
284 | memset(&cp, 0, sizeof(cp)); | |
285 | ||
286 | cp.handle = cpu_to_le16(conn->handle); | |
fe39c7b2 | 287 | cp.rand = rand; |
a7a595f6 | 288 | cp.ediv = ediv; |
fe39c7b2 | 289 | memcpy(cp.ltk, ltk, sizeof(cp.ltk)); |
a7a595f6 VCG |
290 | |
291 | hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); | |
292 | } | |
a7a595f6 | 293 | |
e73439d8 MH |
294 | /* Device _must_ be locked */ |
295 | void hci_sco_setup(struct hci_conn *conn, __u8 status) | |
296 | { | |
297 | struct hci_conn *sco = conn->link; | |
298 | ||
e73439d8 MH |
299 | if (!sco) |
300 | return; | |
301 | ||
38b3fef1 AE |
302 | BT_DBG("hcon %p", conn); |
303 | ||
e73439d8 MH |
304 | if (!status) { |
305 | if (lmp_esco_capable(conn->hdev)) | |
306 | hci_setup_sync(sco, conn->handle); | |
307 | else | |
308 | hci_add_sco(sco, conn->handle); | |
309 | } else { | |
310 | hci_proto_connect_cfm(sco, status); | |
311 | hci_conn_del(sco); | |
312 | } | |
313 | } | |
314 | ||
19c40e3b | 315 | static void hci_conn_timeout(struct work_struct *work) |
1da177e4 | 316 | { |
19c40e3b | 317 | struct hci_conn *conn = container_of(work, struct hci_conn, |
5974e4c4 | 318 | disc_work.work); |
1d56dc4f | 319 | int refcnt = atomic_read(&conn->refcnt); |
1da177e4 | 320 | |
38b3fef1 | 321 | BT_DBG("hcon %p state %s", conn, state_to_string(conn->state)); |
1da177e4 | 322 | |
1d56dc4f LR |
323 | WARN_ON(refcnt < 0); |
324 | ||
325 | /* FIXME: It was observed that in pairing failed scenario, refcnt | |
326 | * drops below 0. Probably this is because l2cap_conn_del calls | |
327 | * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is | |
328 | * dropped. After that loop hci_chan_del is called which also drops | |
329 | * conn. For now make sure that ACL is alive if refcnt is higher then 0, | |
330 | * otherwise drop it. | |
331 | */ | |
332 | if (refcnt > 0) | |
1da177e4 LT |
333 | return; |
334 | ||
6ac59344 MH |
335 | switch (conn->state) { |
336 | case BT_CONNECT: | |
769be974 | 337 | case BT_CONNECT2: |
fcd89c09 VT |
338 | if (conn->out) { |
339 | if (conn->type == ACL_LINK) | |
1aef8669 | 340 | hci_acl_create_connection_cancel(conn); |
fcd89c09 | 341 | else if (conn->type == LE_LINK) |
1aef8669 | 342 | hci_le_create_connection_cancel(conn); |
93796fa6 CT |
343 | } else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) { |
344 | hci_reject_sco(conn); | |
fcd89c09 | 345 | } |
6ac59344 | 346 | break; |
769be974 | 347 | case BT_CONFIG: |
8e87d142 | 348 | case BT_CONNECTED: |
40051e46 MH |
349 | if (conn->type == AMP_LINK) { |
350 | hci_amp_disconn(conn); | |
351 | } else { | |
352 | __u8 reason = hci_proto_disconn_ind(conn); | |
353 | hci_disconnect(conn, reason); | |
354 | } | |
6ac59344 MH |
355 | break; |
356 | default: | |
1da177e4 | 357 | conn->state = BT_CLOSED; |
6ac59344 MH |
358 | break; |
359 | } | |
1da177e4 LT |
360 | } |
361 | ||
416dc94b | 362 | /* Enter sniff mode */ |
a74a84f6 | 363 | static void hci_conn_idle(struct work_struct *work) |
416dc94b | 364 | { |
a74a84f6 JH |
365 | struct hci_conn *conn = container_of(work, struct hci_conn, |
366 | idle_work.work); | |
416dc94b GP |
367 | struct hci_dev *hdev = conn->hdev; |
368 | ||
38b3fef1 | 369 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
416dc94b | 370 | |
416dc94b GP |
371 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) |
372 | return; | |
373 | ||
374 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
375 | return; | |
376 | ||
377 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
378 | struct hci_cp_sniff_subrate cp; | |
379 | cp.handle = cpu_to_le16(conn->handle); | |
dcf4adbf JP |
380 | cp.max_latency = cpu_to_le16(0); |
381 | cp.min_remote_timeout = cpu_to_le16(0); | |
382 | cp.min_local_timeout = cpu_to_le16(0); | |
416dc94b GP |
383 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); |
384 | } | |
385 | ||
51a8efd7 | 386 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
416dc94b GP |
387 | struct hci_cp_sniff_mode cp; |
388 | cp.handle = cpu_to_le16(conn->handle); | |
389 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
390 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
dcf4adbf JP |
391 | cp.attempt = cpu_to_le16(4); |
392 | cp.timeout = cpu_to_le16(1); | |
416dc94b GP |
393 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); |
394 | } | |
395 | } | |
396 | ||
7bc18d9d | 397 | static void hci_conn_auto_accept(struct work_struct *work) |
9f61656a | 398 | { |
7bc18d9d JH |
399 | struct hci_conn *conn = container_of(work, struct hci_conn, |
400 | auto_accept_work.work); | |
9f61656a | 401 | |
7bc18d9d | 402 | hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), |
5974e4c4 | 403 | &conn->dst); |
9f61656a JH |
404 | } |
405 | ||
9489eca4 JH |
406 | static void le_conn_timeout(struct work_struct *work) |
407 | { | |
408 | struct hci_conn *conn = container_of(work, struct hci_conn, | |
409 | le_conn_timeout.work); | |
3c857757 | 410 | struct hci_dev *hdev = conn->hdev; |
9489eca4 JH |
411 | |
412 | BT_DBG(""); | |
413 | ||
3c857757 JH |
414 | /* We could end up here due to having done directed advertising, |
415 | * so clean up the state if necessary. This should however only | |
416 | * happen with broken hardware or if low duty cycle was used | |
417 | * (which doesn't have a timeout of its own). | |
418 | */ | |
0b1db38c | 419 | if (conn->role == HCI_ROLE_SLAVE) { |
3c857757 JH |
420 | u8 enable = 0x00; |
421 | hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), | |
422 | &enable); | |
423 | hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT); | |
424 | return; | |
425 | } | |
426 | ||
9489eca4 JH |
427 | hci_le_create_connection_cancel(conn); |
428 | } | |
429 | ||
a5c4e309 JH |
430 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst, |
431 | u8 role) | |
1da177e4 LT |
432 | { |
433 | struct hci_conn *conn; | |
434 | ||
6ed93dc6 | 435 | BT_DBG("%s dst %pMR", hdev->name, dst); |
1da177e4 | 436 | |
27f70f3e | 437 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
04837f64 | 438 | if (!conn) |
1da177e4 | 439 | return NULL; |
1da177e4 LT |
440 | |
441 | bacpy(&conn->dst, dst); | |
662e8820 | 442 | bacpy(&conn->src, &hdev->bdaddr); |
a8746417 MH |
443 | conn->hdev = hdev; |
444 | conn->type = type; | |
a5c4e309 | 445 | conn->role = role; |
a8746417 MH |
446 | conn->mode = HCI_CM_ACTIVE; |
447 | conn->state = BT_OPEN; | |
93f19c9f | 448 | conn->auth_type = HCI_AT_GENERAL_BONDING; |
17fa4b9d | 449 | conn->io_capability = hdev->io_capability; |
a9583556 | 450 | conn->remote_auth = 0xff; |
13d39315 | 451 | conn->key_type = 0xff; |
ebf86aa3 | 452 | conn->rssi = HCI_RSSI_INVALID; |
5a134fae | 453 | conn->tx_power = HCI_TX_POWER_INVALID; |
d0455ed9 | 454 | conn->max_tx_power = HCI_TX_POWER_INVALID; |
1da177e4 | 455 | |
58a681ef | 456 | set_bit(HCI_CONN_POWER_SAVE, &conn->flags); |
052b30b0 | 457 | conn->disc_timeout = HCI_DISCONN_TIMEOUT; |
04837f64 | 458 | |
a5c4e309 JH |
459 | if (conn->role == HCI_ROLE_MASTER) |
460 | conn->out = true; | |
461 | ||
a8746417 MH |
462 | switch (type) { |
463 | case ACL_LINK: | |
464 | conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; | |
465 | break; | |
9c84d1da JH |
466 | case LE_LINK: |
467 | /* conn->src should reflect the local identity address */ | |
468 | hci_copy_identity_address(hdev, &conn->src, &conn->src_type); | |
469 | break; | |
a8746417 MH |
470 | case SCO_LINK: |
471 | if (lmp_esco_capable(hdev)) | |
efc7688b MH |
472 | conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | |
473 | (hdev->esco_type & EDR_ESCO_MASK); | |
a8746417 MH |
474 | else |
475 | conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; | |
476 | break; | |
477 | case ESCO_LINK: | |
efc7688b | 478 | conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; |
a8746417 MH |
479 | break; |
480 | } | |
481 | ||
1da177e4 | 482 | skb_queue_head_init(&conn->data_q); |
04837f64 | 483 | |
70c1f20b | 484 | INIT_LIST_HEAD(&conn->chan_list); |
73d80deb | 485 | |
19c40e3b | 486 | INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout); |
7bc18d9d | 487 | INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept); |
a74a84f6 | 488 | INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle); |
9489eca4 | 489 | INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout); |
1da177e4 LT |
490 | |
491 | atomic_set(&conn->refcnt, 0); | |
492 | ||
493 | hci_dev_hold(hdev); | |
494 | ||
1da177e4 | 495 | hci_conn_hash_add(hdev, conn); |
3c54711c | 496 | if (hdev->notify) |
1da177e4 LT |
497 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); |
498 | ||
a67e899c MH |
499 | hci_conn_init_sysfs(conn); |
500 | ||
1da177e4 LT |
501 | return conn; |
502 | } | |
503 | ||
504 | int hci_conn_del(struct hci_conn *conn) | |
505 | { | |
506 | struct hci_dev *hdev = conn->hdev; | |
507 | ||
38b3fef1 | 508 | BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle); |
1da177e4 | 509 | |
19c40e3b | 510 | cancel_delayed_work_sync(&conn->disc_work); |
7bc18d9d | 511 | cancel_delayed_work_sync(&conn->auto_accept_work); |
a74a84f6 | 512 | cancel_delayed_work_sync(&conn->idle_work); |
9f61656a | 513 | |
5b7f9909 | 514 | if (conn->type == ACL_LINK) { |
1da177e4 LT |
515 | struct hci_conn *sco = conn->link; |
516 | if (sco) | |
517 | sco->link = NULL; | |
518 | ||
519 | /* Unacked frames */ | |
520 | hdev->acl_cnt += conn->sent; | |
6ed58ec5 | 521 | } else if (conn->type == LE_LINK) { |
980ffc0a | 522 | cancel_delayed_work(&conn->le_conn_timeout); |
9489eca4 | 523 | |
6ed58ec5 VT |
524 | if (hdev->le_pkts) |
525 | hdev->le_cnt += conn->sent; | |
526 | else | |
527 | hdev->acl_cnt += conn->sent; | |
5b7f9909 MH |
528 | } else { |
529 | struct hci_conn *acl = conn->link; | |
530 | if (acl) { | |
531 | acl->link = NULL; | |
76a68ba0 | 532 | hci_conn_drop(acl); |
5b7f9909 | 533 | } |
1da177e4 LT |
534 | } |
535 | ||
2c33c06a | 536 | hci_chan_list_flush(conn); |
73d80deb | 537 | |
9740e49d AE |
538 | if (conn->amp_mgr) |
539 | amp_mgr_put(conn->amp_mgr); | |
540 | ||
1da177e4 | 541 | hci_conn_hash_del(hdev, conn); |
3c54711c | 542 | if (hdev->notify) |
1da177e4 | 543 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); |
7d0db0a3 | 544 | |
1da177e4 | 545 | skb_queue_purge(&conn->data_q); |
1da177e4 | 546 | |
fc225c3f | 547 | hci_conn_del_sysfs(conn); |
2ae9a6be | 548 | |
89cbb063 AA |
549 | if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags)) |
550 | hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type); | |
551 | ||
384943ec MH |
552 | hci_dev_put(hdev); |
553 | ||
8d12356f | 554 | hci_conn_put(conn); |
163f4dab | 555 | |
1da177e4 LT |
556 | return 0; |
557 | } | |
558 | ||
559 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
560 | { | |
561 | int use_src = bacmp(src, BDADDR_ANY); | |
8035ded4 | 562 | struct hci_dev *hdev = NULL, *d; |
1da177e4 | 563 | |
6ed93dc6 | 564 | BT_DBG("%pMR -> %pMR", src, dst); |
1da177e4 | 565 | |
f20d09d5 | 566 | read_lock(&hci_dev_list_lock); |
1da177e4 | 567 | |
8035ded4 | 568 | list_for_each_entry(d, &hci_dev_list, list) { |
8fc9ced3 | 569 | if (!test_bit(HCI_UP, &d->flags) || |
af750e94 | 570 | test_bit(HCI_USER_CHANNEL, &d->dev_flags) || |
d300fa9b | 571 | d->dev_type != HCI_BREDR) |
1da177e4 LT |
572 | continue; |
573 | ||
8e87d142 | 574 | /* Simple routing: |
1da177e4 LT |
575 | * No source address - find interface with bdaddr != dst |
576 | * Source address - find interface with bdaddr == src | |
577 | */ | |
578 | ||
579 | if (use_src) { | |
580 | if (!bacmp(&d->bdaddr, src)) { | |
581 | hdev = d; break; | |
582 | } | |
583 | } else { | |
584 | if (bacmp(&d->bdaddr, dst)) { | |
585 | hdev = d; break; | |
586 | } | |
587 | } | |
588 | } | |
589 | ||
590 | if (hdev) | |
591 | hdev = hci_dev_hold(hdev); | |
592 | ||
f20d09d5 | 593 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
594 | return hdev; |
595 | } | |
596 | EXPORT_SYMBOL(hci_get_route); | |
597 | ||
9bb3c01f | 598 | /* This function requires the caller holds hdev->lock */ |
06c053fb | 599 | void hci_le_conn_failed(struct hci_conn *conn, u8 status) |
9bb3c01f AG |
600 | { |
601 | struct hci_dev *hdev = conn->hdev; | |
f161dd41 JH |
602 | struct hci_conn_params *params; |
603 | ||
604 | params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst, | |
605 | conn->dst_type); | |
606 | if (params && params->conn) { | |
607 | hci_conn_drop(params->conn); | |
f8aaf9b6 | 608 | hci_conn_put(params->conn); |
f161dd41 JH |
609 | params->conn = NULL; |
610 | } | |
9bb3c01f AG |
611 | |
612 | conn->state = BT_CLOSED; | |
613 | ||
614 | mgmt_connect_failed(hdev, &conn->dst, conn->type, conn->dst_type, | |
615 | status); | |
616 | ||
617 | hci_proto_connect_cfm(conn, status); | |
618 | ||
619 | hci_conn_del(conn); | |
a4790dbd AG |
620 | |
621 | /* Since we may have temporarily stopped the background scanning in | |
622 | * favor of connection establishment, we should restart it. | |
623 | */ | |
624 | hci_update_background_scan(hdev); | |
3c857757 JH |
625 | |
626 | /* Re-enable advertising in case this was a failed connection | |
627 | * attempt as a peripheral. | |
628 | */ | |
629 | mgmt_reenable_advertising(hdev); | |
9bb3c01f AG |
630 | } |
631 | ||
1d399ae5 AG |
632 | static void create_le_conn_complete(struct hci_dev *hdev, u8 status) |
633 | { | |
634 | struct hci_conn *conn; | |
635 | ||
636 | if (status == 0) | |
637 | return; | |
638 | ||
639 | BT_ERR("HCI request failed to create LE connection: status 0x%2.2x", | |
640 | status); | |
641 | ||
642 | hci_dev_lock(hdev); | |
643 | ||
644 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
645 | if (!conn) | |
646 | goto done; | |
647 | ||
06c053fb | 648 | hci_le_conn_failed(conn, status); |
1d399ae5 AG |
649 | |
650 | done: | |
651 | hci_dev_unlock(hdev); | |
652 | } | |
653 | ||
2acf3d90 AG |
654 | static void hci_req_add_le_create_conn(struct hci_request *req, |
655 | struct hci_conn *conn) | |
656 | { | |
657 | struct hci_cp_le_create_conn cp; | |
658 | struct hci_dev *hdev = conn->hdev; | |
659 | u8 own_addr_type; | |
660 | ||
661 | memset(&cp, 0, sizeof(cp)); | |
662 | ||
663 | /* Update random address, but set require_privacy to false so | |
9437d2ed | 664 | * that we never connect with an non-resolvable address. |
2acf3d90 AG |
665 | */ |
666 | if (hci_update_random_address(req, false, &own_addr_type)) | |
667 | return; | |
668 | ||
2acf3d90 AG |
669 | cp.scan_interval = cpu_to_le16(hdev->le_scan_interval); |
670 | cp.scan_window = cpu_to_le16(hdev->le_scan_window); | |
671 | bacpy(&cp.peer_addr, &conn->dst); | |
672 | cp.peer_addr_type = conn->dst_type; | |
673 | cp.own_address_type = own_addr_type; | |
674 | cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval); | |
675 | cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval); | |
037fc415 MH |
676 | cp.conn_latency = cpu_to_le16(conn->le_conn_latency); |
677 | cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout); | |
dcf4adbf JP |
678 | cp.min_ce_len = cpu_to_le16(0x0000); |
679 | cp.max_ce_len = cpu_to_le16(0x0000); | |
2acf3d90 AG |
680 | |
681 | hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); | |
b46e0030 JH |
682 | |
683 | conn->state = BT_CONNECT; | |
2acf3d90 AG |
684 | } |
685 | ||
3c857757 JH |
686 | static void hci_req_directed_advertising(struct hci_request *req, |
687 | struct hci_conn *conn) | |
688 | { | |
689 | struct hci_dev *hdev = req->hdev; | |
690 | struct hci_cp_le_set_adv_param cp; | |
691 | u8 own_addr_type; | |
692 | u8 enable; | |
693 | ||
5ce194c4 | 694 | /* Clear the HCI_LE_ADV bit temporarily so that the |
3c857757 JH |
695 | * hci_update_random_address knows that it's safe to go ahead |
696 | * and write a new random address. The flag will be set back on | |
697 | * as soon as the SET_ADV_ENABLE HCI command completes. | |
698 | */ | |
5ce194c4 | 699 | clear_bit(HCI_LE_ADV, &hdev->dev_flags); |
3c857757 JH |
700 | |
701 | /* Set require_privacy to false so that the remote device has a | |
702 | * chance of identifying us. | |
703 | */ | |
704 | if (hci_update_random_address(req, false, &own_addr_type) < 0) | |
705 | return; | |
706 | ||
707 | memset(&cp, 0, sizeof(cp)); | |
708 | cp.type = LE_ADV_DIRECT_IND; | |
709 | cp.own_address_type = own_addr_type; | |
710 | cp.direct_addr_type = conn->dst_type; | |
711 | bacpy(&cp.direct_addr, &conn->dst); | |
712 | cp.channel_map = hdev->le_adv_channel_map; | |
713 | ||
714 | hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp); | |
715 | ||
716 | enable = 0x01; | |
717 | hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable); | |
718 | ||
719 | conn->state = BT_CONNECT; | |
720 | } | |
721 | ||
04a6c589 | 722 | struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, |
cdd6275e | 723 | u8 dst_type, u8 sec_level, u16 conn_timeout, |
e804d25d | 724 | u8 role) |
1da177e4 | 725 | { |
4292f1f3 | 726 | struct hci_conn_params *params; |
f1e5d547 | 727 | struct hci_conn *conn; |
1ebfcc1f | 728 | struct smp_irk *irk; |
2acf3d90 | 729 | struct hci_request req; |
1d399ae5 | 730 | int err; |
1da177e4 | 731 | |
620ad521 AG |
732 | /* Some devices send ATT messages as soon as the physical link is |
733 | * established. To be able to handle these ATT messages, the user- | |
734 | * space first establishes the connection and then starts the pairing | |
735 | * process. | |
736 | * | |
737 | * So if a hci_conn object already exists for the following connection | |
738 | * attempt, we simply update pending_sec_level and auth_type fields | |
739 | * and return the object found. | |
740 | */ | |
f1e5d547 | 741 | conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); |
620ad521 AG |
742 | if (conn) { |
743 | conn->pending_sec_level = sec_level; | |
620ad521 AG |
744 | goto done; |
745 | } | |
dfc94dbd | 746 | |
620ad521 AG |
747 | /* Since the controller supports only one LE connection attempt at a |
748 | * time, we return -EBUSY if there is any connection attempt running. | |
749 | */ | |
750 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
751 | if (conn) | |
752 | return ERR_PTR(-EBUSY); | |
46a190cb | 753 | |
edb4b466 MH |
754 | /* When given an identity address with existing identity |
755 | * resolving key, the connection needs to be established | |
756 | * to a resolvable random address. | |
757 | * | |
758 | * This uses the cached random resolvable address from | |
759 | * a previous scan. When no cached address is available, | |
760 | * try connecting to the identity address instead. | |
761 | * | |
762 | * Storing the resolvable random address is required here | |
763 | * to handle connection failures. The address will later | |
764 | * be resolved back into the original identity address | |
765 | * from the connect request. | |
766 | */ | |
1ebfcc1f JH |
767 | irk = hci_find_irk_by_addr(hdev, dst, dst_type); |
768 | if (irk && bacmp(&irk->rpa, BDADDR_ANY)) { | |
769 | dst = &irk->rpa; | |
770 | dst_type = ADDR_LE_DEV_RANDOM; | |
771 | } | |
772 | ||
a5c4e309 | 773 | conn = hci_conn_add(hdev, LE_LINK, dst, role); |
620ad521 AG |
774 | if (!conn) |
775 | return ERR_PTR(-ENOMEM); | |
9f0caeb1 | 776 | |
1ebfcc1f | 777 | conn->dst_type = dst_type; |
620ad521 | 778 | conn->sec_level = BT_SECURITY_LOW; |
f1e5d547 | 779 | conn->pending_sec_level = sec_level; |
09ae260b | 780 | conn->conn_timeout = conn_timeout; |
4292f1f3 | 781 | |
3c857757 JH |
782 | hci_req_init(&req, hdev); |
783 | ||
376f54c1 JH |
784 | /* Disable advertising if we're active. For master role |
785 | * connections most controllers will refuse to connect if | |
786 | * advertising is enabled, and for slave role connections we | |
787 | * anyway have to disable it in order to start directed | |
788 | * advertising. | |
789 | */ | |
790 | if (test_bit(HCI_LE_ADV, &hdev->dev_flags)) { | |
791 | u8 enable = 0x00; | |
792 | hci_req_add(&req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), | |
793 | &enable); | |
794 | } | |
795 | ||
cdd6275e | 796 | /* If requested to connect as slave use directed advertising */ |
e804d25d | 797 | if (conn->role == HCI_ROLE_SLAVE) { |
e8bb6b97 JH |
798 | /* If we're active scanning most controllers are unable |
799 | * to initiate advertising. Simply reject the attempt. | |
800 | */ | |
801 | if (test_bit(HCI_LE_SCAN, &hdev->dev_flags) && | |
802 | hdev->le_scan_type == LE_SCAN_ACTIVE) { | |
803 | skb_queue_purge(&req.cmd_q); | |
804 | hci_conn_del(conn); | |
805 | return ERR_PTR(-EBUSY); | |
806 | } | |
807 | ||
3c857757 JH |
808 | hci_req_directed_advertising(&req, conn); |
809 | goto create_conn; | |
810 | } | |
811 | ||
4292f1f3 AG |
812 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); |
813 | if (params) { | |
814 | conn->le_conn_min_interval = params->conn_min_interval; | |
815 | conn->le_conn_max_interval = params->conn_max_interval; | |
037fc415 MH |
816 | conn->le_conn_latency = params->conn_latency; |
817 | conn->le_supv_timeout = params->supervision_timeout; | |
4292f1f3 AG |
818 | } else { |
819 | conn->le_conn_min_interval = hdev->le_conn_min_interval; | |
820 | conn->le_conn_max_interval = hdev->le_conn_max_interval; | |
04fb7d90 MH |
821 | conn->le_conn_latency = hdev->le_conn_latency; |
822 | conn->le_supv_timeout = hdev->le_supv_timeout; | |
4292f1f3 | 823 | } |
eda42b50 | 824 | |
2acf3d90 | 825 | /* If controller is scanning, we stop it since some controllers are |
81ad6fd9 JH |
826 | * not able to scan and connect at the same time. Also set the |
827 | * HCI_LE_SCAN_INTERRUPTED flag so that the command complete | |
828 | * handler for scan disabling knows to set the correct discovery | |
829 | * state. | |
2acf3d90 AG |
830 | */ |
831 | if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) { | |
832 | hci_req_add_le_scan_disable(&req); | |
81ad6fd9 | 833 | set_bit(HCI_LE_SCAN_INTERRUPTED, &hdev->dev_flags); |
2acf3d90 AG |
834 | } |
835 | ||
81ad6fd9 JH |
836 | hci_req_add_le_create_conn(&req, conn); |
837 | ||
3c857757 | 838 | create_conn: |
81ad6fd9 | 839 | err = hci_req_run(&req, create_le_conn_complete); |
2acf3d90 AG |
840 | if (err) { |
841 | hci_conn_del(conn); | |
620ad521 | 842 | return ERR_PTR(err); |
2acf3d90 | 843 | } |
fcd89c09 | 844 | |
620ad521 AG |
845 | done: |
846 | hci_conn_hold(conn); | |
f1e5d547 | 847 | return conn; |
d04aef4c | 848 | } |
fcd89c09 | 849 | |
04a6c589 AG |
850 | struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst, |
851 | u8 sec_level, u8 auth_type) | |
1da177e4 LT |
852 | { |
853 | struct hci_conn *acl; | |
fcd89c09 | 854 | |
56f87901 | 855 | if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) |
beb19e4c | 856 | return ERR_PTR(-EOPNOTSUPP); |
56f87901 | 857 | |
70f23020 AE |
858 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
859 | if (!acl) { | |
a5c4e309 | 860 | acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER); |
70f23020 | 861 | if (!acl) |
48c7aba9 | 862 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
863 | } |
864 | ||
865 | hci_conn_hold(acl); | |
866 | ||
09ab6f4c | 867 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
868 | acl->sec_level = BT_SECURITY_LOW; |
869 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 870 | acl->auth_type = auth_type; |
1aef8669 | 871 | hci_acl_create_connection(acl); |
09ab6f4c | 872 | } |
1da177e4 | 873 | |
db474275 VCG |
874 | return acl; |
875 | } | |
876 | ||
10c62ddc FD |
877 | struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst, |
878 | __u16 setting) | |
db474275 VCG |
879 | { |
880 | struct hci_conn *acl; | |
881 | struct hci_conn *sco; | |
882 | ||
e660ed6c | 883 | acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
db474275 | 884 | if (IS_ERR(acl)) |
5b7f9909 | 885 | return acl; |
1da177e4 | 886 | |
70f23020 AE |
887 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
888 | if (!sco) { | |
a5c4e309 | 889 | sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER); |
70f23020 | 890 | if (!sco) { |
76a68ba0 | 891 | hci_conn_drop(acl); |
48c7aba9 | 892 | return ERR_PTR(-ENOMEM); |
1da177e4 | 893 | } |
5b7f9909 | 894 | } |
1da177e4 | 895 | |
5b7f9909 MH |
896 | acl->link = sco; |
897 | sco->link = acl; | |
1da177e4 | 898 | |
5b7f9909 | 899 | hci_conn_hold(sco); |
1da177e4 | 900 | |
10c62ddc FD |
901 | sco->setting = setting; |
902 | ||
5b7f9909 | 903 | if (acl->state == BT_CONNECTED && |
5974e4c4 | 904 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
58a681ef | 905 | set_bit(HCI_CONN_POWER_SAVE, &acl->flags); |
14b12d0b | 906 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 907 | |
51a8efd7 | 908 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { |
e73439d8 | 909 | /* defer SCO setup until mode change completed */ |
51a8efd7 | 910 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); |
e73439d8 MH |
911 | return sco; |
912 | } | |
913 | ||
914 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 915 | } |
5b7f9909 MH |
916 | |
917 | return sco; | |
1da177e4 | 918 | } |
1da177e4 | 919 | |
e7c29cb1 MH |
920 | /* Check link security requirement */ |
921 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
922 | { | |
38b3fef1 | 923 | BT_DBG("hcon %p", conn); |
e7c29cb1 | 924 | |
40b552aa MH |
925 | /* In Secure Connections Only mode, it is required that Secure |
926 | * Connections is used and the link is encrypted with AES-CCM | |
927 | * using a P-256 authenticated combination key. | |
928 | */ | |
929 | if (test_bit(HCI_SC_ONLY, &conn->hdev->flags)) { | |
930 | if (!hci_conn_sc_enabled(conn) || | |
931 | !test_bit(HCI_CONN_AES_CCM, &conn->flags) || | |
932 | conn->key_type != HCI_LK_AUTH_COMBINATION_P256) | |
933 | return 0; | |
934 | } | |
935 | ||
4dae2798 JH |
936 | if (hci_conn_ssp_enabled(conn) && |
937 | !test_bit(HCI_CONN_ENCRYPT, &conn->flags)) | |
e7c29cb1 MH |
938 | return 0; |
939 | ||
940 | return 1; | |
941 | } | |
e7c29cb1 | 942 | |
1da177e4 | 943 | /* Authenticate remote device */ |
0684e5f9 | 944 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 | 945 | { |
38b3fef1 | 946 | BT_DBG("hcon %p", conn); |
1da177e4 | 947 | |
765c2a96 JH |
948 | if (conn->pending_sec_level > sec_level) |
949 | sec_level = conn->pending_sec_level; | |
950 | ||
96a31833 | 951 | if (sec_level > conn->sec_level) |
765c2a96 | 952 | conn->pending_sec_level = sec_level; |
4dae2798 | 953 | else if (test_bit(HCI_CONN_AUTH, &conn->flags)) |
1da177e4 LT |
954 | return 1; |
955 | ||
65cf686e JH |
956 | /* Make sure we preserve an existing MITM requirement*/ |
957 | auth_type |= (conn->auth_type & 0x01); | |
958 | ||
96a31833 MH |
959 | conn->auth_type = auth_type; |
960 | ||
51a8efd7 | 961 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 962 | struct hci_cp_auth_requested cp; |
b7d05bad | 963 | |
aca3192c | 964 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 965 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
5974e4c4 | 966 | sizeof(cp), &cp); |
09da1f34 JH |
967 | |
968 | /* If we're already encrypted set the REAUTH_PEND flag, | |
969 | * otherwise set the ENCRYPT_PEND. | |
970 | */ | |
4dae2798 | 971 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) |
51a8efd7 | 972 | set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); |
09da1f34 JH |
973 | else |
974 | set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); | |
1da177e4 | 975 | } |
8c1b2355 | 976 | |
1da177e4 LT |
977 | return 0; |
978 | } | |
1da177e4 | 979 | |
13d39315 WR |
980 | /* Encrypt the the link */ |
981 | static void hci_conn_encrypt(struct hci_conn *conn) | |
982 | { | |
38b3fef1 | 983 | BT_DBG("hcon %p", conn); |
13d39315 | 984 | |
51a8efd7 | 985 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { |
13d39315 WR |
986 | struct hci_cp_set_conn_encrypt cp; |
987 | cp.handle = cpu_to_le16(conn->handle); | |
988 | cp.encrypt = 0x01; | |
989 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
5974e4c4 | 990 | &cp); |
13d39315 WR |
991 | } |
992 | } | |
993 | ||
8c1b2355 | 994 | /* Enable security */ |
e7cafc45 JH |
995 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type, |
996 | bool initiator) | |
1da177e4 | 997 | { |
38b3fef1 | 998 | BT_DBG("hcon %p", conn); |
1da177e4 | 999 | |
d8343f12 VCG |
1000 | if (conn->type == LE_LINK) |
1001 | return smp_conn_security(conn, sec_level); | |
1002 | ||
13d39315 | 1003 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
1004 | if (sec_level == BT_SECURITY_SDP) |
1005 | return 1; | |
1006 | ||
13d39315 WR |
1007 | /* For non 2.1 devices and low security level we don't need the link |
1008 | key. */ | |
aa64a8b5 | 1009 | if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) |
3fdca1e1 | 1010 | return 1; |
8c1b2355 | 1011 | |
13d39315 | 1012 | /* For other security levels we need the link key. */ |
4dae2798 | 1013 | if (!test_bit(HCI_CONN_AUTH, &conn->flags)) |
13d39315 WR |
1014 | goto auth; |
1015 | ||
7b5a9241 MH |
1016 | /* An authenticated FIPS approved combination key has sufficient |
1017 | * security for security level 4. */ | |
1018 | if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 && | |
1019 | sec_level == BT_SECURITY_FIPS) | |
1020 | goto encrypt; | |
1021 | ||
1022 | /* An authenticated combination key has sufficient security for | |
1023 | security level 3. */ | |
1024 | if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 || | |
1025 | conn->key_type == HCI_LK_AUTH_COMBINATION_P256) && | |
1026 | sec_level == BT_SECURITY_HIGH) | |
13d39315 WR |
1027 | goto encrypt; |
1028 | ||
1029 | /* An unauthenticated combination key has sufficient security for | |
1030 | security level 1 and 2. */ | |
66138ce8 MH |
1031 | if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 || |
1032 | conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) && | |
5974e4c4 | 1033 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW)) |
13d39315 WR |
1034 | goto encrypt; |
1035 | ||
1036 | /* A combination key has always sufficient security for the security | |
1037 | levels 1 or 2. High security level requires the combination key | |
1038 | is generated using maximum PIN code length (16). | |
1039 | For pre 2.1 units. */ | |
1040 | if (conn->key_type == HCI_LK_COMBINATION && | |
7b5a9241 MH |
1041 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW || |
1042 | conn->pin_length == 16)) | |
13d39315 WR |
1043 | goto encrypt; |
1044 | ||
1045 | auth: | |
51a8efd7 | 1046 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) |
1da177e4 LT |
1047 | return 0; |
1048 | ||
977f8fce JH |
1049 | if (initiator) |
1050 | set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); | |
1051 | ||
6fdf658c LAD |
1052 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
1053 | return 0; | |
13d39315 WR |
1054 | |
1055 | encrypt: | |
4dae2798 | 1056 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) |
13d39315 | 1057 | return 1; |
8c1b2355 | 1058 | |
13d39315 | 1059 | hci_conn_encrypt(conn); |
1da177e4 LT |
1060 | return 0; |
1061 | } | |
8c1b2355 | 1062 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 1063 | |
b3b1b061 WR |
1064 | /* Check secure link requirement */ |
1065 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
1066 | { | |
38b3fef1 | 1067 | BT_DBG("hcon %p", conn); |
b3b1b061 | 1068 | |
9cb2e030 MH |
1069 | /* Accept if non-secure or higher security level is required */ |
1070 | if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS) | |
1071 | return 1; | |
b3b1b061 | 1072 | |
9cb2e030 MH |
1073 | /* Accept if secure or higher security level is already present */ |
1074 | if (conn->sec_level == BT_SECURITY_HIGH || | |
1075 | conn->sec_level == BT_SECURITY_FIPS) | |
b3b1b061 WR |
1076 | return 1; |
1077 | ||
9cb2e030 MH |
1078 | /* Reject not secure link */ |
1079 | return 0; | |
b3b1b061 WR |
1080 | } |
1081 | EXPORT_SYMBOL(hci_conn_check_secure); | |
1082 | ||
1da177e4 LT |
1083 | /* Change link key */ |
1084 | int hci_conn_change_link_key(struct hci_conn *conn) | |
1085 | { | |
38b3fef1 | 1086 | BT_DBG("hcon %p", conn); |
1da177e4 | 1087 | |
51a8efd7 | 1088 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 1089 | struct hci_cp_change_conn_link_key cp; |
aca3192c | 1090 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 1091 | hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY, |
5974e4c4 | 1092 | sizeof(cp), &cp); |
1da177e4 | 1093 | } |
8c1b2355 | 1094 | |
1da177e4 LT |
1095 | return 0; |
1096 | } | |
1da177e4 LT |
1097 | |
1098 | /* Switch role */ | |
8c1b2355 | 1099 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 | 1100 | { |
38b3fef1 | 1101 | BT_DBG("hcon %p", conn); |
1da177e4 | 1102 | |
40bef302 | 1103 | if (role == conn->role) |
1da177e4 LT |
1104 | return 1; |
1105 | ||
51a8efd7 | 1106 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { |
1da177e4 LT |
1107 | struct hci_cp_switch_role cp; |
1108 | bacpy(&cp.bdaddr, &conn->dst); | |
1109 | cp.role = role; | |
a9de9248 | 1110 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 1111 | } |
8c1b2355 | 1112 | |
1da177e4 LT |
1113 | return 0; |
1114 | } | |
1115 | EXPORT_SYMBOL(hci_conn_switch_role); | |
1116 | ||
04837f64 | 1117 | /* Enter active mode */ |
14b12d0b | 1118 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
1119 | { |
1120 | struct hci_dev *hdev = conn->hdev; | |
1121 | ||
38b3fef1 | 1122 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
04837f64 | 1123 | |
14b12d0b JG |
1124 | if (conn->mode != HCI_CM_SNIFF) |
1125 | goto timer; | |
1126 | ||
58a681ef | 1127 | if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) |
04837f64 MH |
1128 | goto timer; |
1129 | ||
51a8efd7 | 1130 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
04837f64 | 1131 | struct hci_cp_exit_sniff_mode cp; |
aca3192c | 1132 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 1133 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
1134 | } |
1135 | ||
1136 | timer: | |
1137 | if (hdev->idle_timeout > 0) | |
a74a84f6 JH |
1138 | queue_delayed_work(hdev->workqueue, &conn->idle_work, |
1139 | msecs_to_jiffies(hdev->idle_timeout)); | |
04837f64 MH |
1140 | } |
1141 | ||
1da177e4 LT |
1142 | /* Drop all connection on the device */ |
1143 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
1144 | { | |
1145 | struct hci_conn_hash *h = &hdev->conn_hash; | |
3c4e0df0 | 1146 | struct hci_conn *c, *n; |
1da177e4 LT |
1147 | |
1148 | BT_DBG("hdev %s", hdev->name); | |
1149 | ||
3c4e0df0 | 1150 | list_for_each_entry_safe(c, n, &h->list, list) { |
1da177e4 LT |
1151 | c->state = BT_CLOSED; |
1152 | ||
9f5a0d7b | 1153 | hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); |
1da177e4 LT |
1154 | hci_conn_del(c); |
1155 | } | |
1156 | } | |
1157 | ||
a9de9248 MH |
1158 | /* Check pending connect attempts */ |
1159 | void hci_conn_check_pending(struct hci_dev *hdev) | |
1160 | { | |
1161 | struct hci_conn *conn; | |
1162 | ||
1163 | BT_DBG("hdev %s", hdev->name); | |
1164 | ||
1165 | hci_dev_lock(hdev); | |
1166 | ||
1167 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
1168 | if (conn) | |
1aef8669 | 1169 | hci_acl_create_connection(conn); |
a9de9248 MH |
1170 | |
1171 | hci_dev_unlock(hdev); | |
1172 | } | |
1173 | ||
4dae2798 JH |
1174 | static u32 get_link_mode(struct hci_conn *conn) |
1175 | { | |
1176 | u32 link_mode = 0; | |
1177 | ||
40bef302 | 1178 | if (conn->role == HCI_ROLE_MASTER) |
4dae2798 JH |
1179 | link_mode |= HCI_LM_MASTER; |
1180 | ||
1181 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) | |
1182 | link_mode |= HCI_LM_ENCRYPT; | |
1183 | ||
1184 | if (test_bit(HCI_CONN_AUTH, &conn->flags)) | |
1185 | link_mode |= HCI_LM_AUTH; | |
1186 | ||
1187 | if (test_bit(HCI_CONN_SECURE, &conn->flags)) | |
1188 | link_mode |= HCI_LM_SECURE; | |
1189 | ||
1190 | if (test_bit(HCI_CONN_FIPS, &conn->flags)) | |
1191 | link_mode |= HCI_LM_FIPS; | |
1192 | ||
1193 | return link_mode; | |
1194 | } | |
1195 | ||
1da177e4 LT |
1196 | int hci_get_conn_list(void __user *arg) |
1197 | { | |
fc5fef61 | 1198 | struct hci_conn *c; |
1da177e4 LT |
1199 | struct hci_conn_list_req req, *cl; |
1200 | struct hci_conn_info *ci; | |
1201 | struct hci_dev *hdev; | |
1da177e4 LT |
1202 | int n = 0, size, err; |
1203 | ||
1204 | if (copy_from_user(&req, arg, sizeof(req))) | |
1205 | return -EFAULT; | |
1206 | ||
1207 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
1208 | return -EINVAL; | |
1209 | ||
1210 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
1211 | ||
70f23020 AE |
1212 | cl = kmalloc(size, GFP_KERNEL); |
1213 | if (!cl) | |
1da177e4 LT |
1214 | return -ENOMEM; |
1215 | ||
70f23020 AE |
1216 | hdev = hci_dev_get(req.dev_id); |
1217 | if (!hdev) { | |
1da177e4 LT |
1218 | kfree(cl); |
1219 | return -ENODEV; | |
1220 | } | |
1221 | ||
1222 | ci = cl->conn_info; | |
1223 | ||
09fd0de5 | 1224 | hci_dev_lock(hdev); |
8035ded4 | 1225 | list_for_each_entry(c, &hdev->conn_hash.list, list) { |
1da177e4 LT |
1226 | bacpy(&(ci + n)->bdaddr, &c->dst); |
1227 | (ci + n)->handle = c->handle; | |
1228 | (ci + n)->type = c->type; | |
1229 | (ci + n)->out = c->out; | |
1230 | (ci + n)->state = c->state; | |
4dae2798 | 1231 | (ci + n)->link_mode = get_link_mode(c); |
1da177e4 LT |
1232 | if (++n >= req.conn_num) |
1233 | break; | |
1234 | } | |
09fd0de5 | 1235 | hci_dev_unlock(hdev); |
1da177e4 LT |
1236 | |
1237 | cl->dev_id = hdev->id; | |
1238 | cl->conn_num = n; | |
1239 | size = sizeof(req) + n * sizeof(*ci); | |
1240 | ||
1241 | hci_dev_put(hdev); | |
1242 | ||
1243 | err = copy_to_user(arg, cl, size); | |
1244 | kfree(cl); | |
1245 | ||
1246 | return err ? -EFAULT : 0; | |
1247 | } | |
1248 | ||
1249 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
1250 | { | |
1251 | struct hci_conn_info_req req; | |
1252 | struct hci_conn_info ci; | |
1253 | struct hci_conn *conn; | |
1254 | char __user *ptr = arg + sizeof(req); | |
1255 | ||
1256 | if (copy_from_user(&req, arg, sizeof(req))) | |
1257 | return -EFAULT; | |
1258 | ||
09fd0de5 | 1259 | hci_dev_lock(hdev); |
1da177e4 LT |
1260 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); |
1261 | if (conn) { | |
1262 | bacpy(&ci.bdaddr, &conn->dst); | |
1263 | ci.handle = conn->handle; | |
1264 | ci.type = conn->type; | |
1265 | ci.out = conn->out; | |
1266 | ci.state = conn->state; | |
4dae2798 | 1267 | ci.link_mode = get_link_mode(conn); |
1da177e4 | 1268 | } |
09fd0de5 | 1269 | hci_dev_unlock(hdev); |
1da177e4 LT |
1270 | |
1271 | if (!conn) | |
1272 | return -ENOENT; | |
1273 | ||
1274 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
1275 | } | |
40be492f MH |
1276 | |
1277 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
1278 | { | |
1279 | struct hci_auth_info_req req; | |
1280 | struct hci_conn *conn; | |
1281 | ||
1282 | if (copy_from_user(&req, arg, sizeof(req))) | |
1283 | return -EFAULT; | |
1284 | ||
09fd0de5 | 1285 | hci_dev_lock(hdev); |
40be492f MH |
1286 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); |
1287 | if (conn) | |
1288 | req.type = conn->auth_type; | |
09fd0de5 | 1289 | hci_dev_unlock(hdev); |
40be492f MH |
1290 | |
1291 | if (!conn) | |
1292 | return -ENOENT; | |
1293 | ||
1294 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
1295 | } | |
73d80deb LAD |
1296 | |
1297 | struct hci_chan *hci_chan_create(struct hci_conn *conn) | |
1298 | { | |
1299 | struct hci_dev *hdev = conn->hdev; | |
1300 | struct hci_chan *chan; | |
1301 | ||
38b3fef1 | 1302 | BT_DBG("%s hcon %p", hdev->name, conn); |
73d80deb | 1303 | |
f94b665d JH |
1304 | if (test_bit(HCI_CONN_DROP, &conn->flags)) { |
1305 | BT_DBG("Refusing to create new hci_chan"); | |
1306 | return NULL; | |
1307 | } | |
1308 | ||
27f70f3e | 1309 | chan = kzalloc(sizeof(*chan), GFP_KERNEL); |
73d80deb LAD |
1310 | if (!chan) |
1311 | return NULL; | |
1312 | ||
6c388d32 | 1313 | chan->conn = hci_conn_get(conn); |
73d80deb | 1314 | skb_queue_head_init(&chan->data_q); |
168df8e5 | 1315 | chan->state = BT_CONNECTED; |
73d80deb | 1316 | |
8192edef | 1317 | list_add_rcu(&chan->list, &conn->chan_list); |
73d80deb LAD |
1318 | |
1319 | return chan; | |
1320 | } | |
1321 | ||
9472007c | 1322 | void hci_chan_del(struct hci_chan *chan) |
73d80deb LAD |
1323 | { |
1324 | struct hci_conn *conn = chan->conn; | |
1325 | struct hci_dev *hdev = conn->hdev; | |
1326 | ||
38b3fef1 | 1327 | BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan); |
73d80deb | 1328 | |
8192edef GP |
1329 | list_del_rcu(&chan->list); |
1330 | ||
1331 | synchronize_rcu(); | |
73d80deb | 1332 | |
bcbb655a | 1333 | /* Prevent new hci_chan's to be created for this hci_conn */ |
f94b665d | 1334 | set_bit(HCI_CONN_DROP, &conn->flags); |
b3ff670a | 1335 | |
6c388d32 | 1336 | hci_conn_put(conn); |
e9b02748 | 1337 | |
73d80deb LAD |
1338 | skb_queue_purge(&chan->data_q); |
1339 | kfree(chan); | |
73d80deb LAD |
1340 | } |
1341 | ||
2c33c06a | 1342 | void hci_chan_list_flush(struct hci_conn *conn) |
73d80deb | 1343 | { |
2a5a5ec6 | 1344 | struct hci_chan *chan, *n; |
73d80deb | 1345 | |
38b3fef1 | 1346 | BT_DBG("hcon %p", conn); |
73d80deb | 1347 | |
2a5a5ec6 | 1348 | list_for_each_entry_safe(chan, n, &conn->chan_list, list) |
73d80deb LAD |
1349 | hci_chan_del(chan); |
1350 | } | |
42c4e53e AE |
1351 | |
1352 | static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon, | |
1353 | __u16 handle) | |
1354 | { | |
1355 | struct hci_chan *hchan; | |
1356 | ||
1357 | list_for_each_entry(hchan, &hcon->chan_list, list) { | |
1358 | if (hchan->handle == handle) | |
1359 | return hchan; | |
1360 | } | |
1361 | ||
1362 | return NULL; | |
1363 | } | |
1364 | ||
1365 | struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle) | |
1366 | { | |
1367 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1368 | struct hci_conn *hcon; | |
1369 | struct hci_chan *hchan = NULL; | |
1370 | ||
1371 | rcu_read_lock(); | |
1372 | ||
1373 | list_for_each_entry_rcu(hcon, &h->list, list) { | |
1374 | hchan = __hci_chan_lookup_handle(hcon, handle); | |
1375 | if (hchan) | |
1376 | break; | |
1377 | } | |
1378 | ||
1379 | rcu_read_unlock(); | |
1380 | ||
1381 | return hchan; | |
1382 | } |