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> |
23b9ceb7 | 28 | #include <linux/debugfs.h> |
1da177e4 LT |
29 | |
30 | #include <net/bluetooth/bluetooth.h> | |
31 | #include <net/bluetooth/hci_core.h> | |
4bc58f51 | 32 | #include <net/bluetooth/l2cap.h> |
1da177e4 | 33 | |
0857dd3b | 34 | #include "hci_request.h" |
ac4b7236 | 35 | #include "smp.h" |
7024728e MH |
36 | #include "a2mp.h" |
37 | ||
2dea632f FD |
38 | struct sco_param { |
39 | u16 pkt_type; | |
40 | u16 max_latency; | |
c7da5797 | 41 | u8 retrans_effort; |
2dea632f FD |
42 | }; |
43 | ||
48e68ff5 | 44 | static const struct sco_param esco_param_cvsd[] = { |
c7da5797 JH |
45 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a, 0x01 }, /* S3 */ |
46 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007, 0x01 }, /* S2 */ | |
47 | { EDR_ESCO_MASK | ESCO_EV3, 0x0007, 0x01 }, /* S1 */ | |
48 | { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0x01 }, /* D1 */ | |
49 | { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0x01 }, /* D0 */ | |
2dea632f FD |
50 | }; |
51 | ||
48e68ff5 | 52 | static const struct sco_param sco_param_cvsd[] = { |
c7da5797 JH |
53 | { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0xff }, /* D1 */ |
54 | { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0xff }, /* D0 */ | |
48e68ff5 BT |
55 | }; |
56 | ||
565766b0 | 57 | static const struct sco_param esco_param_msbc[] = { |
c7da5797 JH |
58 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d, 0x02 }, /* T2 */ |
59 | { EDR_ESCO_MASK | ESCO_EV3, 0x0008, 0x02 }, /* T1 */ | |
2dea632f FD |
60 | }; |
61 | ||
1aef8669 | 62 | static void hci_le_create_connection_cancel(struct hci_conn *conn) |
fcd89c09 VT |
63 | { |
64 | hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); | |
65 | } | |
66 | ||
1aef8669 | 67 | static void hci_acl_create_connection(struct hci_conn *conn) |
1da177e4 LT |
68 | { |
69 | struct hci_dev *hdev = conn->hdev; | |
70 | struct inquiry_entry *ie; | |
71 | struct hci_cp_create_conn cp; | |
72 | ||
42d2d87c | 73 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
74 | |
75 | conn->state = BT_CONNECT; | |
a0c808b3 | 76 | conn->out = true; |
40bef302 | 77 | conn->role = HCI_ROLE_MASTER; |
1da177e4 | 78 | |
4c67bc74 MH |
79 | conn->attempt++; |
80 | ||
e4e8e37c MH |
81 | conn->link_policy = hdev->link_policy; |
82 | ||
1da177e4 LT |
83 | memset(&cp, 0, sizeof(cp)); |
84 | bacpy(&cp.bdaddr, &conn->dst); | |
85 | cp.pscan_rep_mode = 0x02; | |
86 | ||
70f23020 AE |
87 | ie = hci_inquiry_cache_lookup(hdev, &conn->dst); |
88 | if (ie) { | |
41a96212 MH |
89 | if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { |
90 | cp.pscan_rep_mode = ie->data.pscan_rep_mode; | |
91 | cp.pscan_mode = ie->data.pscan_mode; | |
92 | cp.clock_offset = ie->data.clock_offset | | |
dcf4adbf | 93 | cpu_to_le16(0x8000); |
41a96212 MH |
94 | } |
95 | ||
1da177e4 | 96 | memcpy(conn->dev_class, ie->data.dev_class, 3); |
58a681ef JH |
97 | if (ie->data.ssp_mode > 0) |
98 | set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); | |
1da177e4 LT |
99 | } |
100 | ||
a8746417 | 101 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 102 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) |
b6a0dc82 | 103 | cp.role_switch = 0x01; |
1da177e4 | 104 | else |
b6a0dc82 | 105 | cp.role_switch = 0x00; |
4c67bc74 | 106 | |
a9de9248 | 107 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); |
1da177e4 LT |
108 | } |
109 | ||
1aef8669 | 110 | static void hci_acl_create_connection_cancel(struct hci_conn *conn) |
6ac59344 MH |
111 | { |
112 | struct hci_cp_create_conn_cancel cp; | |
113 | ||
38b3fef1 | 114 | BT_DBG("hcon %p", conn); |
6ac59344 | 115 | |
d095c1eb | 116 | if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2) |
6ac59344 MH |
117 | return; |
118 | ||
119 | bacpy(&cp.bdaddr, &conn->dst); | |
a9de9248 | 120 | hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); |
6ac59344 MH |
121 | } |
122 | ||
93796fa6 CT |
123 | static void hci_reject_sco(struct hci_conn *conn) |
124 | { | |
125 | struct hci_cp_reject_sync_conn_req cp; | |
126 | ||
d41c15cf | 127 | cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES; |
93796fa6 CT |
128 | bacpy(&cp.bdaddr, &conn->dst); |
129 | ||
130 | hci_send_cmd(conn->hdev, HCI_OP_REJECT_SYNC_CONN_REQ, sizeof(cp), &cp); | |
131 | } | |
132 | ||
e3b679d5 | 133 | int hci_disconnect(struct hci_conn *conn, __u8 reason) |
1da177e4 LT |
134 | { |
135 | struct hci_cp_disconnect cp; | |
136 | ||
38b3fef1 | 137 | BT_DBG("hcon %p", conn); |
1da177e4 | 138 | |
839035a7 JH |
139 | /* When we are master of an established connection and it enters |
140 | * the disconnect timeout, then go ahead and try to read the | |
141 | * current clock offset. Processing of the result is done | |
142 | * within the event handling and hci_clock_offset_evt function. | |
143 | */ | |
144 | if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER) { | |
145 | struct hci_dev *hdev = conn->hdev; | |
4f639ede | 146 | struct hci_cp_read_clock_offset clkoff_cp; |
839035a7 | 147 | |
4f639ede FF |
148 | clkoff_cp.handle = cpu_to_le16(conn->handle); |
149 | hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp), | |
150 | &clkoff_cp); | |
839035a7 JH |
151 | } |
152 | ||
1da177e4 LT |
153 | conn->state = BT_DISCONN; |
154 | ||
aca3192c | 155 | cp.handle = cpu_to_le16(conn->handle); |
1da177e4 | 156 | cp.reason = reason; |
e3b679d5 | 157 | return hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); |
1da177e4 LT |
158 | } |
159 | ||
a2b1976b | 160 | static void hci_amp_disconn(struct hci_conn *conn) |
53502d69 AE |
161 | { |
162 | struct hci_cp_disconn_phy_link cp; | |
163 | ||
164 | BT_DBG("hcon %p", conn); | |
165 | ||
166 | conn->state = BT_DISCONN; | |
167 | ||
168 | cp.phy_handle = HCI_PHY_HANDLE(conn->handle); | |
a2b1976b | 169 | cp.reason = hci_proto_disconn_ind(conn); |
53502d69 AE |
170 | hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK, |
171 | sizeof(cp), &cp); | |
172 | } | |
173 | ||
57f5d0d1 | 174 | static void hci_add_sco(struct hci_conn *conn, __u16 handle) |
1da177e4 LT |
175 | { |
176 | struct hci_dev *hdev = conn->hdev; | |
177 | struct hci_cp_add_sco cp; | |
178 | ||
38b3fef1 | 179 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
180 | |
181 | conn->state = BT_CONNECT; | |
a0c808b3 | 182 | conn->out = true; |
1da177e4 | 183 | |
efc7688b MH |
184 | conn->attempt++; |
185 | ||
aca3192c | 186 | cp.handle = cpu_to_le16(handle); |
a8746417 | 187 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 188 | |
a9de9248 | 189 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); |
1da177e4 LT |
190 | } |
191 | ||
2dea632f | 192 | bool hci_setup_sync(struct hci_conn *conn, __u16 handle) |
b6a0dc82 MH |
193 | { |
194 | struct hci_dev *hdev = conn->hdev; | |
195 | struct hci_cp_setup_sync_conn cp; | |
2dea632f | 196 | const struct sco_param *param; |
b6a0dc82 | 197 | |
38b3fef1 | 198 | BT_DBG("hcon %p", conn); |
b6a0dc82 MH |
199 | |
200 | conn->state = BT_CONNECT; | |
a0c808b3 | 201 | conn->out = true; |
b6a0dc82 | 202 | |
efc7688b MH |
203 | conn->attempt++; |
204 | ||
b6a0dc82 | 205 | cp.handle = cpu_to_le16(handle); |
b6a0dc82 | 206 | |
dcf4adbf JP |
207 | cp.tx_bandwidth = cpu_to_le32(0x00001f40); |
208 | cp.rx_bandwidth = cpu_to_le32(0x00001f40); | |
10c62ddc FD |
209 | cp.voice_setting = cpu_to_le16(conn->setting); |
210 | ||
211 | switch (conn->setting & SCO_AIRMODE_MASK) { | |
212 | case SCO_AIRMODE_TRANSP: | |
565766b0 | 213 | if (conn->attempt > ARRAY_SIZE(esco_param_msbc)) |
2dea632f | 214 | return false; |
565766b0 | 215 | param = &esco_param_msbc[conn->attempt - 1]; |
10c62ddc FD |
216 | break; |
217 | case SCO_AIRMODE_CVSD: | |
48e68ff5 BT |
218 | if (lmp_esco_capable(conn->link)) { |
219 | if (conn->attempt > ARRAY_SIZE(esco_param_cvsd)) | |
220 | return false; | |
48e68ff5 BT |
221 | param = &esco_param_cvsd[conn->attempt - 1]; |
222 | } else { | |
223 | if (conn->attempt > ARRAY_SIZE(sco_param_cvsd)) | |
224 | return false; | |
48e68ff5 BT |
225 | param = &sco_param_cvsd[conn->attempt - 1]; |
226 | } | |
10c62ddc | 227 | break; |
2dea632f FD |
228 | default: |
229 | return false; | |
10c62ddc | 230 | } |
b6a0dc82 | 231 | |
c7da5797 | 232 | cp.retrans_effort = param->retrans_effort; |
2dea632f FD |
233 | cp.pkt_type = __cpu_to_le16(param->pkt_type); |
234 | cp.max_latency = __cpu_to_le16(param->max_latency); | |
235 | ||
236 | if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0) | |
237 | return false; | |
238 | ||
239 | return true; | |
b6a0dc82 MH |
240 | } |
241 | ||
7d6ca693 JH |
242 | u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency, |
243 | u16 to_multiplier) | |
2ce603eb | 244 | { |
2ce603eb | 245 | struct hci_dev *hdev = conn->hdev; |
f044eb05 MH |
246 | struct hci_conn_params *params; |
247 | struct hci_cp_le_conn_update cp; | |
2ce603eb | 248 | |
f044eb05 | 249 | hci_dev_lock(hdev); |
2ce603eb | 250 | |
f044eb05 MH |
251 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); |
252 | if (params) { | |
253 | params->conn_min_interval = min; | |
254 | params->conn_max_interval = max; | |
255 | params->conn_latency = latency; | |
256 | params->supervision_timeout = to_multiplier; | |
257 | } | |
258 | ||
259 | hci_dev_unlock(hdev); | |
260 | ||
261 | memset(&cp, 0, sizeof(cp)); | |
2ce603eb CT |
262 | cp.handle = cpu_to_le16(conn->handle); |
263 | cp.conn_interval_min = cpu_to_le16(min); | |
264 | cp.conn_interval_max = cpu_to_le16(max); | |
265 | cp.conn_latency = cpu_to_le16(latency); | |
266 | cp.supervision_timeout = cpu_to_le16(to_multiplier); | |
dcf4adbf JP |
267 | cp.min_ce_len = cpu_to_le16(0x0000); |
268 | cp.max_ce_len = cpu_to_le16(0x0000); | |
2ce603eb CT |
269 | |
270 | hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); | |
7d6ca693 JH |
271 | |
272 | if (params) | |
273 | return 0x01; | |
274 | ||
275 | return 0x00; | |
2ce603eb | 276 | } |
2ce603eb | 277 | |
fe39c7b2 | 278 | void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand, |
5974e4c4 | 279 | __u8 ltk[16]) |
a7a595f6 VCG |
280 | { |
281 | struct hci_dev *hdev = conn->hdev; | |
282 | struct hci_cp_le_start_enc cp; | |
283 | ||
38b3fef1 | 284 | BT_DBG("hcon %p", conn); |
a7a595f6 VCG |
285 | |
286 | memset(&cp, 0, sizeof(cp)); | |
287 | ||
288 | cp.handle = cpu_to_le16(conn->handle); | |
fe39c7b2 | 289 | cp.rand = rand; |
a7a595f6 | 290 | cp.ediv = ediv; |
fe39c7b2 | 291 | memcpy(cp.ltk, ltk, sizeof(cp.ltk)); |
a7a595f6 VCG |
292 | |
293 | hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); | |
294 | } | |
a7a595f6 | 295 | |
e73439d8 MH |
296 | /* Device _must_ be locked */ |
297 | void hci_sco_setup(struct hci_conn *conn, __u8 status) | |
298 | { | |
299 | struct hci_conn *sco = conn->link; | |
300 | ||
e73439d8 MH |
301 | if (!sco) |
302 | return; | |
303 | ||
38b3fef1 AE |
304 | BT_DBG("hcon %p", conn); |
305 | ||
e73439d8 MH |
306 | if (!status) { |
307 | if (lmp_esco_capable(conn->hdev)) | |
308 | hci_setup_sync(sco, conn->handle); | |
309 | else | |
310 | hci_add_sco(sco, conn->handle); | |
311 | } else { | |
539c496d | 312 | hci_connect_cfm(sco, status); |
e73439d8 MH |
313 | hci_conn_del(sco); |
314 | } | |
315 | } | |
316 | ||
19c40e3b | 317 | static void hci_conn_timeout(struct work_struct *work) |
1da177e4 | 318 | { |
19c40e3b | 319 | struct hci_conn *conn = container_of(work, struct hci_conn, |
5974e4c4 | 320 | disc_work.work); |
1d56dc4f | 321 | int refcnt = atomic_read(&conn->refcnt); |
1da177e4 | 322 | |
38b3fef1 | 323 | BT_DBG("hcon %p state %s", conn, state_to_string(conn->state)); |
1da177e4 | 324 | |
1d56dc4f LR |
325 | WARN_ON(refcnt < 0); |
326 | ||
327 | /* FIXME: It was observed that in pairing failed scenario, refcnt | |
328 | * drops below 0. Probably this is because l2cap_conn_del calls | |
329 | * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is | |
330 | * dropped. After that loop hci_chan_del is called which also drops | |
331 | * conn. For now make sure that ACL is alive if refcnt is higher then 0, | |
332 | * otherwise drop it. | |
333 | */ | |
334 | if (refcnt > 0) | |
1da177e4 LT |
335 | return; |
336 | ||
6ac59344 MH |
337 | switch (conn->state) { |
338 | case BT_CONNECT: | |
769be974 | 339 | case BT_CONNECT2: |
fcd89c09 VT |
340 | if (conn->out) { |
341 | if (conn->type == ACL_LINK) | |
1aef8669 | 342 | hci_acl_create_connection_cancel(conn); |
fcd89c09 | 343 | else if (conn->type == LE_LINK) |
1aef8669 | 344 | hci_le_create_connection_cancel(conn); |
93796fa6 CT |
345 | } else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) { |
346 | hci_reject_sco(conn); | |
fcd89c09 | 347 | } |
6ac59344 | 348 | break; |
769be974 | 349 | case BT_CONFIG: |
8e87d142 | 350 | case BT_CONNECTED: |
40051e46 MH |
351 | if (conn->type == AMP_LINK) { |
352 | hci_amp_disconn(conn); | |
353 | } else { | |
354 | __u8 reason = hci_proto_disconn_ind(conn); | |
355 | hci_disconnect(conn, reason); | |
356 | } | |
6ac59344 MH |
357 | break; |
358 | default: | |
1da177e4 | 359 | conn->state = BT_CLOSED; |
6ac59344 MH |
360 | break; |
361 | } | |
1da177e4 LT |
362 | } |
363 | ||
416dc94b | 364 | /* Enter sniff mode */ |
a74a84f6 | 365 | static void hci_conn_idle(struct work_struct *work) |
416dc94b | 366 | { |
a74a84f6 JH |
367 | struct hci_conn *conn = container_of(work, struct hci_conn, |
368 | idle_work.work); | |
416dc94b GP |
369 | struct hci_dev *hdev = conn->hdev; |
370 | ||
38b3fef1 | 371 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
416dc94b | 372 | |
416dc94b GP |
373 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) |
374 | return; | |
375 | ||
376 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
377 | return; | |
378 | ||
379 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
380 | struct hci_cp_sniff_subrate cp; | |
381 | cp.handle = cpu_to_le16(conn->handle); | |
dcf4adbf JP |
382 | cp.max_latency = cpu_to_le16(0); |
383 | cp.min_remote_timeout = cpu_to_le16(0); | |
384 | cp.min_local_timeout = cpu_to_le16(0); | |
416dc94b GP |
385 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); |
386 | } | |
387 | ||
51a8efd7 | 388 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
416dc94b GP |
389 | struct hci_cp_sniff_mode cp; |
390 | cp.handle = cpu_to_le16(conn->handle); | |
391 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
392 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
dcf4adbf JP |
393 | cp.attempt = cpu_to_le16(4); |
394 | cp.timeout = cpu_to_le16(1); | |
416dc94b GP |
395 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); |
396 | } | |
397 | } | |
398 | ||
7bc18d9d | 399 | static void hci_conn_auto_accept(struct work_struct *work) |
9f61656a | 400 | { |
7bc18d9d JH |
401 | struct hci_conn *conn = container_of(work, struct hci_conn, |
402 | auto_accept_work.work); | |
9f61656a | 403 | |
7bc18d9d | 404 | hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), |
5974e4c4 | 405 | &conn->dst); |
9f61656a JH |
406 | } |
407 | ||
9489eca4 JH |
408 | static void le_conn_timeout(struct work_struct *work) |
409 | { | |
410 | struct hci_conn *conn = container_of(work, struct hci_conn, | |
411 | le_conn_timeout.work); | |
3c857757 | 412 | struct hci_dev *hdev = conn->hdev; |
9489eca4 JH |
413 | |
414 | BT_DBG(""); | |
415 | ||
3c857757 JH |
416 | /* We could end up here due to having done directed advertising, |
417 | * so clean up the state if necessary. This should however only | |
418 | * happen with broken hardware or if low duty cycle was used | |
419 | * (which doesn't have a timeout of its own). | |
420 | */ | |
0b1db38c | 421 | if (conn->role == HCI_ROLE_SLAVE) { |
3c857757 JH |
422 | u8 enable = 0x00; |
423 | hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), | |
424 | &enable); | |
425 | hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT); | |
426 | return; | |
427 | } | |
428 | ||
9489eca4 JH |
429 | hci_le_create_connection_cancel(conn); |
430 | } | |
431 | ||
a5c4e309 JH |
432 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst, |
433 | u8 role) | |
1da177e4 LT |
434 | { |
435 | struct hci_conn *conn; | |
436 | ||
6ed93dc6 | 437 | BT_DBG("%s dst %pMR", hdev->name, dst); |
1da177e4 | 438 | |
27f70f3e | 439 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
04837f64 | 440 | if (!conn) |
1da177e4 | 441 | return NULL; |
1da177e4 LT |
442 | |
443 | bacpy(&conn->dst, dst); | |
662e8820 | 444 | bacpy(&conn->src, &hdev->bdaddr); |
a8746417 MH |
445 | conn->hdev = hdev; |
446 | conn->type = type; | |
a5c4e309 | 447 | conn->role = role; |
a8746417 MH |
448 | conn->mode = HCI_CM_ACTIVE; |
449 | conn->state = BT_OPEN; | |
93f19c9f | 450 | conn->auth_type = HCI_AT_GENERAL_BONDING; |
17fa4b9d | 451 | conn->io_capability = hdev->io_capability; |
a9583556 | 452 | conn->remote_auth = 0xff; |
13d39315 | 453 | conn->key_type = 0xff; |
ebf86aa3 | 454 | conn->rssi = HCI_RSSI_INVALID; |
5a134fae | 455 | conn->tx_power = HCI_TX_POWER_INVALID; |
d0455ed9 | 456 | conn->max_tx_power = HCI_TX_POWER_INVALID; |
1da177e4 | 457 | |
58a681ef | 458 | set_bit(HCI_CONN_POWER_SAVE, &conn->flags); |
052b30b0 | 459 | conn->disc_timeout = HCI_DISCONN_TIMEOUT; |
04837f64 | 460 | |
a5c4e309 JH |
461 | if (conn->role == HCI_ROLE_MASTER) |
462 | conn->out = true; | |
463 | ||
a8746417 MH |
464 | switch (type) { |
465 | case ACL_LINK: | |
466 | conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; | |
467 | break; | |
9c84d1da JH |
468 | case LE_LINK: |
469 | /* conn->src should reflect the local identity address */ | |
470 | hci_copy_identity_address(hdev, &conn->src, &conn->src_type); | |
471 | break; | |
a8746417 MH |
472 | case SCO_LINK: |
473 | if (lmp_esco_capable(hdev)) | |
efc7688b MH |
474 | conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | |
475 | (hdev->esco_type & EDR_ESCO_MASK); | |
a8746417 MH |
476 | else |
477 | conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; | |
478 | break; | |
479 | case ESCO_LINK: | |
efc7688b | 480 | conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; |
a8746417 MH |
481 | break; |
482 | } | |
483 | ||
1da177e4 | 484 | skb_queue_head_init(&conn->data_q); |
04837f64 | 485 | |
70c1f20b | 486 | INIT_LIST_HEAD(&conn->chan_list); |
73d80deb | 487 | |
19c40e3b | 488 | INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout); |
7bc18d9d | 489 | INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept); |
a74a84f6 | 490 | INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle); |
9489eca4 | 491 | INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout); |
1da177e4 LT |
492 | |
493 | atomic_set(&conn->refcnt, 0); | |
494 | ||
495 | hci_dev_hold(hdev); | |
496 | ||
1da177e4 | 497 | hci_conn_hash_add(hdev, conn); |
3c54711c | 498 | if (hdev->notify) |
1da177e4 LT |
499 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); |
500 | ||
a67e899c MH |
501 | hci_conn_init_sysfs(conn); |
502 | ||
1da177e4 LT |
503 | return conn; |
504 | } | |
505 | ||
506 | int hci_conn_del(struct hci_conn *conn) | |
507 | { | |
508 | struct hci_dev *hdev = conn->hdev; | |
509 | ||
38b3fef1 | 510 | BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle); |
1da177e4 | 511 | |
19c40e3b | 512 | cancel_delayed_work_sync(&conn->disc_work); |
7bc18d9d | 513 | cancel_delayed_work_sync(&conn->auto_accept_work); |
a74a84f6 | 514 | cancel_delayed_work_sync(&conn->idle_work); |
9f61656a | 515 | |
5b7f9909 | 516 | if (conn->type == ACL_LINK) { |
1da177e4 LT |
517 | struct hci_conn *sco = conn->link; |
518 | if (sco) | |
519 | sco->link = NULL; | |
520 | ||
521 | /* Unacked frames */ | |
522 | hdev->acl_cnt += conn->sent; | |
6ed58ec5 | 523 | } else if (conn->type == LE_LINK) { |
980ffc0a | 524 | cancel_delayed_work(&conn->le_conn_timeout); |
9489eca4 | 525 | |
6ed58ec5 VT |
526 | if (hdev->le_pkts) |
527 | hdev->le_cnt += conn->sent; | |
528 | else | |
529 | hdev->acl_cnt += conn->sent; | |
5b7f9909 MH |
530 | } else { |
531 | struct hci_conn *acl = conn->link; | |
532 | if (acl) { | |
533 | acl->link = NULL; | |
76a68ba0 | 534 | hci_conn_drop(acl); |
5b7f9909 | 535 | } |
1da177e4 LT |
536 | } |
537 | ||
2c33c06a | 538 | hci_chan_list_flush(conn); |
73d80deb | 539 | |
9740e49d AE |
540 | if (conn->amp_mgr) |
541 | amp_mgr_put(conn->amp_mgr); | |
542 | ||
1da177e4 | 543 | hci_conn_hash_del(hdev, conn); |
3c54711c | 544 | if (hdev->notify) |
1da177e4 | 545 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); |
7d0db0a3 | 546 | |
1da177e4 | 547 | skb_queue_purge(&conn->data_q); |
1da177e4 | 548 | |
fc225c3f | 549 | hci_conn_del_sysfs(conn); |
2ae9a6be | 550 | |
23b9ceb7 MH |
551 | debugfs_remove_recursive(conn->debugfs); |
552 | ||
89cbb063 AA |
553 | if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags)) |
554 | hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type); | |
555 | ||
384943ec MH |
556 | hci_dev_put(hdev); |
557 | ||
8d12356f | 558 | hci_conn_put(conn); |
163f4dab | 559 | |
1da177e4 LT |
560 | return 0; |
561 | } | |
562 | ||
563 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
564 | { | |
565 | int use_src = bacmp(src, BDADDR_ANY); | |
8035ded4 | 566 | struct hci_dev *hdev = NULL, *d; |
1da177e4 | 567 | |
6ed93dc6 | 568 | BT_DBG("%pMR -> %pMR", src, dst); |
1da177e4 | 569 | |
f20d09d5 | 570 | read_lock(&hci_dev_list_lock); |
1da177e4 | 571 | |
8035ded4 | 572 | list_for_each_entry(d, &hci_dev_list, list) { |
8fc9ced3 | 573 | if (!test_bit(HCI_UP, &d->flags) || |
d7a5a11d | 574 | hci_dev_test_flag(d, HCI_USER_CHANNEL) || |
d300fa9b | 575 | d->dev_type != HCI_BREDR) |
1da177e4 LT |
576 | continue; |
577 | ||
8e87d142 | 578 | /* Simple routing: |
1da177e4 LT |
579 | * No source address - find interface with bdaddr != dst |
580 | * Source address - find interface with bdaddr == src | |
581 | */ | |
582 | ||
583 | if (use_src) { | |
584 | if (!bacmp(&d->bdaddr, src)) { | |
585 | hdev = d; break; | |
586 | } | |
587 | } else { | |
588 | if (bacmp(&d->bdaddr, dst)) { | |
589 | hdev = d; break; | |
590 | } | |
591 | } | |
592 | } | |
593 | ||
594 | if (hdev) | |
595 | hdev = hci_dev_hold(hdev); | |
596 | ||
f20d09d5 | 597 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
598 | return hdev; |
599 | } | |
600 | EXPORT_SYMBOL(hci_get_route); | |
601 | ||
9bb3c01f | 602 | /* This function requires the caller holds hdev->lock */ |
06c053fb | 603 | void hci_le_conn_failed(struct hci_conn *conn, u8 status) |
9bb3c01f AG |
604 | { |
605 | struct hci_dev *hdev = conn->hdev; | |
f161dd41 JH |
606 | struct hci_conn_params *params; |
607 | ||
608 | params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst, | |
609 | conn->dst_type); | |
610 | if (params && params->conn) { | |
611 | hci_conn_drop(params->conn); | |
f8aaf9b6 | 612 | hci_conn_put(params->conn); |
f161dd41 JH |
613 | params->conn = NULL; |
614 | } | |
9bb3c01f AG |
615 | |
616 | conn->state = BT_CLOSED; | |
617 | ||
618 | mgmt_connect_failed(hdev, &conn->dst, conn->type, conn->dst_type, | |
619 | status); | |
620 | ||
539c496d | 621 | hci_connect_cfm(conn, status); |
9bb3c01f AG |
622 | |
623 | hci_conn_del(conn); | |
a4790dbd AG |
624 | |
625 | /* Since we may have temporarily stopped the background scanning in | |
626 | * favor of connection establishment, we should restart it. | |
627 | */ | |
628 | hci_update_background_scan(hdev); | |
3c857757 JH |
629 | |
630 | /* Re-enable advertising in case this was a failed connection | |
631 | * attempt as a peripheral. | |
632 | */ | |
633 | mgmt_reenable_advertising(hdev); | |
9bb3c01f AG |
634 | } |
635 | ||
1904a853 | 636 | static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode) |
1d399ae5 AG |
637 | { |
638 | struct hci_conn *conn; | |
639 | ||
640 | if (status == 0) | |
641 | return; | |
642 | ||
643 | BT_ERR("HCI request failed to create LE connection: status 0x%2.2x", | |
644 | status); | |
645 | ||
646 | hci_dev_lock(hdev); | |
647 | ||
648 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
649 | if (!conn) | |
650 | goto done; | |
651 | ||
06c053fb | 652 | hci_le_conn_failed(conn, status); |
1d399ae5 AG |
653 | |
654 | done: | |
655 | hci_dev_unlock(hdev); | |
656 | } | |
657 | ||
2acf3d90 AG |
658 | static void hci_req_add_le_create_conn(struct hci_request *req, |
659 | struct hci_conn *conn) | |
660 | { | |
661 | struct hci_cp_le_create_conn cp; | |
662 | struct hci_dev *hdev = conn->hdev; | |
663 | u8 own_addr_type; | |
664 | ||
665 | memset(&cp, 0, sizeof(cp)); | |
666 | ||
667 | /* Update random address, but set require_privacy to false so | |
9437d2ed | 668 | * that we never connect with an non-resolvable address. |
2acf3d90 AG |
669 | */ |
670 | if (hci_update_random_address(req, false, &own_addr_type)) | |
671 | return; | |
672 | ||
2acf3d90 AG |
673 | cp.scan_interval = cpu_to_le16(hdev->le_scan_interval); |
674 | cp.scan_window = cpu_to_le16(hdev->le_scan_window); | |
675 | bacpy(&cp.peer_addr, &conn->dst); | |
676 | cp.peer_addr_type = conn->dst_type; | |
677 | cp.own_address_type = own_addr_type; | |
678 | cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval); | |
679 | cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval); | |
037fc415 MH |
680 | cp.conn_latency = cpu_to_le16(conn->le_conn_latency); |
681 | cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout); | |
dcf4adbf JP |
682 | cp.min_ce_len = cpu_to_le16(0x0000); |
683 | cp.max_ce_len = cpu_to_le16(0x0000); | |
2acf3d90 AG |
684 | |
685 | hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); | |
b46e0030 JH |
686 | |
687 | conn->state = BT_CONNECT; | |
2acf3d90 AG |
688 | } |
689 | ||
3c857757 JH |
690 | static void hci_req_directed_advertising(struct hci_request *req, |
691 | struct hci_conn *conn) | |
692 | { | |
693 | struct hci_dev *hdev = req->hdev; | |
694 | struct hci_cp_le_set_adv_param cp; | |
695 | u8 own_addr_type; | |
696 | u8 enable; | |
697 | ||
5ce194c4 | 698 | /* Clear the HCI_LE_ADV bit temporarily so that the |
3c857757 JH |
699 | * hci_update_random_address knows that it's safe to go ahead |
700 | * and write a new random address. The flag will be set back on | |
701 | * as soon as the SET_ADV_ENABLE HCI command completes. | |
702 | */ | |
a358dc11 | 703 | hci_dev_clear_flag(hdev, HCI_LE_ADV); |
3c857757 JH |
704 | |
705 | /* Set require_privacy to false so that the remote device has a | |
706 | * chance of identifying us. | |
707 | */ | |
708 | if (hci_update_random_address(req, false, &own_addr_type) < 0) | |
709 | return; | |
710 | ||
711 | memset(&cp, 0, sizeof(cp)); | |
712 | cp.type = LE_ADV_DIRECT_IND; | |
713 | cp.own_address_type = own_addr_type; | |
714 | cp.direct_addr_type = conn->dst_type; | |
715 | bacpy(&cp.direct_addr, &conn->dst); | |
716 | cp.channel_map = hdev->le_adv_channel_map; | |
717 | ||
718 | hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp); | |
719 | ||
720 | enable = 0x01; | |
721 | hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable); | |
722 | ||
723 | conn->state = BT_CONNECT; | |
724 | } | |
725 | ||
04a6c589 | 726 | struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, |
cdd6275e | 727 | u8 dst_type, u8 sec_level, u16 conn_timeout, |
e804d25d | 728 | u8 role) |
1da177e4 | 729 | { |
4292f1f3 | 730 | struct hci_conn_params *params; |
f1e5d547 | 731 | struct hci_conn *conn; |
1ebfcc1f | 732 | struct smp_irk *irk; |
2acf3d90 | 733 | struct hci_request req; |
1d399ae5 | 734 | int err; |
1da177e4 | 735 | |
152d386e | 736 | /* Let's make sure that le is enabled.*/ |
d7a5a11d | 737 | if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { |
152d386e LR |
738 | if (lmp_le_capable(hdev)) |
739 | return ERR_PTR(-ECONNREFUSED); | |
740 | ||
741 | return ERR_PTR(-EOPNOTSUPP); | |
742 | } | |
743 | ||
620ad521 AG |
744 | /* Some devices send ATT messages as soon as the physical link is |
745 | * established. To be able to handle these ATT messages, the user- | |
746 | * space first establishes the connection and then starts the pairing | |
747 | * process. | |
748 | * | |
749 | * So if a hci_conn object already exists for the following connection | |
750 | * attempt, we simply update pending_sec_level and auth_type fields | |
751 | * and return the object found. | |
752 | */ | |
f1e5d547 | 753 | conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); |
620ad521 AG |
754 | if (conn) { |
755 | conn->pending_sec_level = sec_level; | |
620ad521 AG |
756 | goto done; |
757 | } | |
dfc94dbd | 758 | |
620ad521 AG |
759 | /* Since the controller supports only one LE connection attempt at a |
760 | * time, we return -EBUSY if there is any connection attempt running. | |
761 | */ | |
762 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
763 | if (conn) | |
764 | return ERR_PTR(-EBUSY); | |
46a190cb | 765 | |
edb4b466 MH |
766 | /* When given an identity address with existing identity |
767 | * resolving key, the connection needs to be established | |
768 | * to a resolvable random address. | |
769 | * | |
770 | * This uses the cached random resolvable address from | |
771 | * a previous scan. When no cached address is available, | |
772 | * try connecting to the identity address instead. | |
773 | * | |
774 | * Storing the resolvable random address is required here | |
775 | * to handle connection failures. The address will later | |
776 | * be resolved back into the original identity address | |
777 | * from the connect request. | |
778 | */ | |
1ebfcc1f JH |
779 | irk = hci_find_irk_by_addr(hdev, dst, dst_type); |
780 | if (irk && bacmp(&irk->rpa, BDADDR_ANY)) { | |
781 | dst = &irk->rpa; | |
782 | dst_type = ADDR_LE_DEV_RANDOM; | |
783 | } | |
784 | ||
a5c4e309 | 785 | conn = hci_conn_add(hdev, LE_LINK, dst, role); |
620ad521 AG |
786 | if (!conn) |
787 | return ERR_PTR(-ENOMEM); | |
9f0caeb1 | 788 | |
1ebfcc1f | 789 | conn->dst_type = dst_type; |
620ad521 | 790 | conn->sec_level = BT_SECURITY_LOW; |
f1e5d547 | 791 | conn->pending_sec_level = sec_level; |
09ae260b | 792 | conn->conn_timeout = conn_timeout; |
4292f1f3 | 793 | |
3c857757 JH |
794 | hci_req_init(&req, hdev); |
795 | ||
376f54c1 JH |
796 | /* Disable advertising if we're active. For master role |
797 | * connections most controllers will refuse to connect if | |
798 | * advertising is enabled, and for slave role connections we | |
799 | * anyway have to disable it in order to start directed | |
800 | * advertising. | |
801 | */ | |
d7a5a11d | 802 | if (hci_dev_test_flag(hdev, HCI_LE_ADV)) { |
376f54c1 JH |
803 | u8 enable = 0x00; |
804 | hci_req_add(&req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), | |
805 | &enable); | |
806 | } | |
807 | ||
cdd6275e | 808 | /* If requested to connect as slave use directed advertising */ |
e804d25d | 809 | if (conn->role == HCI_ROLE_SLAVE) { |
e8bb6b97 JH |
810 | /* If we're active scanning most controllers are unable |
811 | * to initiate advertising. Simply reject the attempt. | |
812 | */ | |
d7a5a11d | 813 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN) && |
e8bb6b97 JH |
814 | hdev->le_scan_type == LE_SCAN_ACTIVE) { |
815 | skb_queue_purge(&req.cmd_q); | |
816 | hci_conn_del(conn); | |
817 | return ERR_PTR(-EBUSY); | |
818 | } | |
819 | ||
3c857757 JH |
820 | hci_req_directed_advertising(&req, conn); |
821 | goto create_conn; | |
822 | } | |
823 | ||
4292f1f3 AG |
824 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); |
825 | if (params) { | |
826 | conn->le_conn_min_interval = params->conn_min_interval; | |
827 | conn->le_conn_max_interval = params->conn_max_interval; | |
037fc415 MH |
828 | conn->le_conn_latency = params->conn_latency; |
829 | conn->le_supv_timeout = params->supervision_timeout; | |
4292f1f3 AG |
830 | } else { |
831 | conn->le_conn_min_interval = hdev->le_conn_min_interval; | |
832 | conn->le_conn_max_interval = hdev->le_conn_max_interval; | |
04fb7d90 MH |
833 | conn->le_conn_latency = hdev->le_conn_latency; |
834 | conn->le_supv_timeout = hdev->le_supv_timeout; | |
4292f1f3 | 835 | } |
eda42b50 | 836 | |
2acf3d90 | 837 | /* If controller is scanning, we stop it since some controllers are |
81ad6fd9 JH |
838 | * not able to scan and connect at the same time. Also set the |
839 | * HCI_LE_SCAN_INTERRUPTED flag so that the command complete | |
840 | * handler for scan disabling knows to set the correct discovery | |
841 | * state. | |
2acf3d90 | 842 | */ |
d7a5a11d | 843 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) { |
2acf3d90 | 844 | hci_req_add_le_scan_disable(&req); |
a1536da2 | 845 | hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED); |
2acf3d90 AG |
846 | } |
847 | ||
81ad6fd9 JH |
848 | hci_req_add_le_create_conn(&req, conn); |
849 | ||
3c857757 | 850 | create_conn: |
81ad6fd9 | 851 | err = hci_req_run(&req, create_le_conn_complete); |
2acf3d90 AG |
852 | if (err) { |
853 | hci_conn_del(conn); | |
620ad521 | 854 | return ERR_PTR(err); |
2acf3d90 | 855 | } |
fcd89c09 | 856 | |
620ad521 AG |
857 | done: |
858 | hci_conn_hold(conn); | |
f1e5d547 | 859 | return conn; |
d04aef4c | 860 | } |
fcd89c09 | 861 | |
04a6c589 AG |
862 | struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst, |
863 | u8 sec_level, u8 auth_type) | |
1da177e4 LT |
864 | { |
865 | struct hci_conn *acl; | |
fcd89c09 | 866 | |
d7a5a11d | 867 | if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) { |
c411110e LR |
868 | if (lmp_bredr_capable(hdev)) |
869 | return ERR_PTR(-ECONNREFUSED); | |
870 | ||
beb19e4c | 871 | return ERR_PTR(-EOPNOTSUPP); |
c411110e | 872 | } |
56f87901 | 873 | |
70f23020 AE |
874 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
875 | if (!acl) { | |
a5c4e309 | 876 | acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER); |
70f23020 | 877 | if (!acl) |
48c7aba9 | 878 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
879 | } |
880 | ||
881 | hci_conn_hold(acl); | |
882 | ||
09ab6f4c | 883 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
884 | acl->sec_level = BT_SECURITY_LOW; |
885 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 886 | acl->auth_type = auth_type; |
1aef8669 | 887 | hci_acl_create_connection(acl); |
09ab6f4c | 888 | } |
1da177e4 | 889 | |
db474275 VCG |
890 | return acl; |
891 | } | |
892 | ||
10c62ddc FD |
893 | struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst, |
894 | __u16 setting) | |
db474275 VCG |
895 | { |
896 | struct hci_conn *acl; | |
897 | struct hci_conn *sco; | |
898 | ||
e660ed6c | 899 | acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
db474275 | 900 | if (IS_ERR(acl)) |
5b7f9909 | 901 | return acl; |
1da177e4 | 902 | |
70f23020 AE |
903 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
904 | if (!sco) { | |
a5c4e309 | 905 | sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER); |
70f23020 | 906 | if (!sco) { |
76a68ba0 | 907 | hci_conn_drop(acl); |
48c7aba9 | 908 | return ERR_PTR(-ENOMEM); |
1da177e4 | 909 | } |
5b7f9909 | 910 | } |
1da177e4 | 911 | |
5b7f9909 MH |
912 | acl->link = sco; |
913 | sco->link = acl; | |
1da177e4 | 914 | |
5b7f9909 | 915 | hci_conn_hold(sco); |
1da177e4 | 916 | |
10c62ddc FD |
917 | sco->setting = setting; |
918 | ||
5b7f9909 | 919 | if (acl->state == BT_CONNECTED && |
5974e4c4 | 920 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
58a681ef | 921 | set_bit(HCI_CONN_POWER_SAVE, &acl->flags); |
14b12d0b | 922 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 923 | |
51a8efd7 | 924 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { |
e73439d8 | 925 | /* defer SCO setup until mode change completed */ |
51a8efd7 | 926 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); |
e73439d8 MH |
927 | return sco; |
928 | } | |
929 | ||
930 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 931 | } |
5b7f9909 MH |
932 | |
933 | return sco; | |
1da177e4 | 934 | } |
1da177e4 | 935 | |
e7c29cb1 MH |
936 | /* Check link security requirement */ |
937 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
938 | { | |
38b3fef1 | 939 | BT_DBG("hcon %p", conn); |
e7c29cb1 | 940 | |
40b552aa MH |
941 | /* In Secure Connections Only mode, it is required that Secure |
942 | * Connections is used and the link is encrypted with AES-CCM | |
943 | * using a P-256 authenticated combination key. | |
944 | */ | |
d7a5a11d | 945 | if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) { |
40b552aa MH |
946 | if (!hci_conn_sc_enabled(conn) || |
947 | !test_bit(HCI_CONN_AES_CCM, &conn->flags) || | |
948 | conn->key_type != HCI_LK_AUTH_COMBINATION_P256) | |
949 | return 0; | |
950 | } | |
951 | ||
4dae2798 JH |
952 | if (hci_conn_ssp_enabled(conn) && |
953 | !test_bit(HCI_CONN_ENCRYPT, &conn->flags)) | |
e7c29cb1 MH |
954 | return 0; |
955 | ||
956 | return 1; | |
957 | } | |
e7c29cb1 | 958 | |
1da177e4 | 959 | /* Authenticate remote device */ |
0684e5f9 | 960 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 | 961 | { |
38b3fef1 | 962 | BT_DBG("hcon %p", conn); |
1da177e4 | 963 | |
765c2a96 JH |
964 | if (conn->pending_sec_level > sec_level) |
965 | sec_level = conn->pending_sec_level; | |
966 | ||
96a31833 | 967 | if (sec_level > conn->sec_level) |
765c2a96 | 968 | conn->pending_sec_level = sec_level; |
4dae2798 | 969 | else if (test_bit(HCI_CONN_AUTH, &conn->flags)) |
1da177e4 LT |
970 | return 1; |
971 | ||
65cf686e JH |
972 | /* Make sure we preserve an existing MITM requirement*/ |
973 | auth_type |= (conn->auth_type & 0x01); | |
974 | ||
96a31833 MH |
975 | conn->auth_type = auth_type; |
976 | ||
51a8efd7 | 977 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 978 | struct hci_cp_auth_requested cp; |
b7d05bad | 979 | |
aca3192c | 980 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 981 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
5974e4c4 | 982 | sizeof(cp), &cp); |
09da1f34 JH |
983 | |
984 | /* If we're already encrypted set the REAUTH_PEND flag, | |
985 | * otherwise set the ENCRYPT_PEND. | |
986 | */ | |
4dae2798 | 987 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) |
51a8efd7 | 988 | set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); |
09da1f34 JH |
989 | else |
990 | set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); | |
1da177e4 | 991 | } |
8c1b2355 | 992 | |
1da177e4 LT |
993 | return 0; |
994 | } | |
1da177e4 | 995 | |
13d39315 WR |
996 | /* Encrypt the the link */ |
997 | static void hci_conn_encrypt(struct hci_conn *conn) | |
998 | { | |
38b3fef1 | 999 | BT_DBG("hcon %p", conn); |
13d39315 | 1000 | |
51a8efd7 | 1001 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { |
13d39315 WR |
1002 | struct hci_cp_set_conn_encrypt cp; |
1003 | cp.handle = cpu_to_le16(conn->handle); | |
1004 | cp.encrypt = 0x01; | |
1005 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
5974e4c4 | 1006 | &cp); |
13d39315 WR |
1007 | } |
1008 | } | |
1009 | ||
8c1b2355 | 1010 | /* Enable security */ |
e7cafc45 JH |
1011 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type, |
1012 | bool initiator) | |
1da177e4 | 1013 | { |
38b3fef1 | 1014 | BT_DBG("hcon %p", conn); |
1da177e4 | 1015 | |
d8343f12 VCG |
1016 | if (conn->type == LE_LINK) |
1017 | return smp_conn_security(conn, sec_level); | |
1018 | ||
13d39315 | 1019 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
1020 | if (sec_level == BT_SECURITY_SDP) |
1021 | return 1; | |
1022 | ||
13d39315 WR |
1023 | /* For non 2.1 devices and low security level we don't need the link |
1024 | key. */ | |
aa64a8b5 | 1025 | if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) |
3fdca1e1 | 1026 | return 1; |
8c1b2355 | 1027 | |
13d39315 | 1028 | /* For other security levels we need the link key. */ |
4dae2798 | 1029 | if (!test_bit(HCI_CONN_AUTH, &conn->flags)) |
13d39315 WR |
1030 | goto auth; |
1031 | ||
7b5a9241 MH |
1032 | /* An authenticated FIPS approved combination key has sufficient |
1033 | * security for security level 4. */ | |
1034 | if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 && | |
1035 | sec_level == BT_SECURITY_FIPS) | |
1036 | goto encrypt; | |
1037 | ||
1038 | /* An authenticated combination key has sufficient security for | |
1039 | security level 3. */ | |
1040 | if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 || | |
1041 | conn->key_type == HCI_LK_AUTH_COMBINATION_P256) && | |
1042 | sec_level == BT_SECURITY_HIGH) | |
13d39315 WR |
1043 | goto encrypt; |
1044 | ||
1045 | /* An unauthenticated combination key has sufficient security for | |
1046 | security level 1 and 2. */ | |
66138ce8 MH |
1047 | if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 || |
1048 | conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) && | |
5974e4c4 | 1049 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW)) |
13d39315 WR |
1050 | goto encrypt; |
1051 | ||
1052 | /* A combination key has always sufficient security for the security | |
1053 | levels 1 or 2. High security level requires the combination key | |
1054 | is generated using maximum PIN code length (16). | |
1055 | For pre 2.1 units. */ | |
1056 | if (conn->key_type == HCI_LK_COMBINATION && | |
7b5a9241 MH |
1057 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW || |
1058 | conn->pin_length == 16)) | |
13d39315 WR |
1059 | goto encrypt; |
1060 | ||
1061 | auth: | |
51a8efd7 | 1062 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) |
1da177e4 LT |
1063 | return 0; |
1064 | ||
977f8fce JH |
1065 | if (initiator) |
1066 | set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); | |
1067 | ||
6fdf658c LAD |
1068 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
1069 | return 0; | |
13d39315 WR |
1070 | |
1071 | encrypt: | |
4dae2798 | 1072 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) |
13d39315 | 1073 | return 1; |
8c1b2355 | 1074 | |
13d39315 | 1075 | hci_conn_encrypt(conn); |
1da177e4 LT |
1076 | return 0; |
1077 | } | |
8c1b2355 | 1078 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 1079 | |
b3b1b061 WR |
1080 | /* Check secure link requirement */ |
1081 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
1082 | { | |
38b3fef1 | 1083 | BT_DBG("hcon %p", conn); |
b3b1b061 | 1084 | |
9cb2e030 MH |
1085 | /* Accept if non-secure or higher security level is required */ |
1086 | if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS) | |
1087 | return 1; | |
b3b1b061 | 1088 | |
9cb2e030 MH |
1089 | /* Accept if secure or higher security level is already present */ |
1090 | if (conn->sec_level == BT_SECURITY_HIGH || | |
1091 | conn->sec_level == BT_SECURITY_FIPS) | |
b3b1b061 WR |
1092 | return 1; |
1093 | ||
9cb2e030 MH |
1094 | /* Reject not secure link */ |
1095 | return 0; | |
b3b1b061 WR |
1096 | } |
1097 | EXPORT_SYMBOL(hci_conn_check_secure); | |
1098 | ||
1da177e4 | 1099 | /* Switch role */ |
8c1b2355 | 1100 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 | 1101 | { |
38b3fef1 | 1102 | BT_DBG("hcon %p", conn); |
1da177e4 | 1103 | |
40bef302 | 1104 | if (role == conn->role) |
1da177e4 LT |
1105 | return 1; |
1106 | ||
51a8efd7 | 1107 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { |
1da177e4 LT |
1108 | struct hci_cp_switch_role cp; |
1109 | bacpy(&cp.bdaddr, &conn->dst); | |
1110 | cp.role = role; | |
a9de9248 | 1111 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 1112 | } |
8c1b2355 | 1113 | |
1da177e4 LT |
1114 | return 0; |
1115 | } | |
1116 | EXPORT_SYMBOL(hci_conn_switch_role); | |
1117 | ||
04837f64 | 1118 | /* Enter active mode */ |
14b12d0b | 1119 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
1120 | { |
1121 | struct hci_dev *hdev = conn->hdev; | |
1122 | ||
38b3fef1 | 1123 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
04837f64 | 1124 | |
14b12d0b JG |
1125 | if (conn->mode != HCI_CM_SNIFF) |
1126 | goto timer; | |
1127 | ||
58a681ef | 1128 | if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) |
04837f64 MH |
1129 | goto timer; |
1130 | ||
51a8efd7 | 1131 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
04837f64 | 1132 | struct hci_cp_exit_sniff_mode cp; |
aca3192c | 1133 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 1134 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
1135 | } |
1136 | ||
1137 | timer: | |
1138 | if (hdev->idle_timeout > 0) | |
a74a84f6 JH |
1139 | queue_delayed_work(hdev->workqueue, &conn->idle_work, |
1140 | msecs_to_jiffies(hdev->idle_timeout)); | |
04837f64 MH |
1141 | } |
1142 | ||
1da177e4 LT |
1143 | /* Drop all connection on the device */ |
1144 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
1145 | { | |
1146 | struct hci_conn_hash *h = &hdev->conn_hash; | |
3c4e0df0 | 1147 | struct hci_conn *c, *n; |
1da177e4 LT |
1148 | |
1149 | BT_DBG("hdev %s", hdev->name); | |
1150 | ||
3c4e0df0 | 1151 | list_for_each_entry_safe(c, n, &h->list, list) { |
1da177e4 LT |
1152 | c->state = BT_CLOSED; |
1153 | ||
3a6d576b | 1154 | hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); |
1da177e4 LT |
1155 | hci_conn_del(c); |
1156 | } | |
1157 | } | |
1158 | ||
a9de9248 MH |
1159 | /* Check pending connect attempts */ |
1160 | void hci_conn_check_pending(struct hci_dev *hdev) | |
1161 | { | |
1162 | struct hci_conn *conn; | |
1163 | ||
1164 | BT_DBG("hdev %s", hdev->name); | |
1165 | ||
1166 | hci_dev_lock(hdev); | |
1167 | ||
1168 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
1169 | if (conn) | |
1aef8669 | 1170 | hci_acl_create_connection(conn); |
a9de9248 MH |
1171 | |
1172 | hci_dev_unlock(hdev); | |
1173 | } | |
1174 | ||
4dae2798 JH |
1175 | static u32 get_link_mode(struct hci_conn *conn) |
1176 | { | |
1177 | u32 link_mode = 0; | |
1178 | ||
40bef302 | 1179 | if (conn->role == HCI_ROLE_MASTER) |
4dae2798 JH |
1180 | link_mode |= HCI_LM_MASTER; |
1181 | ||
1182 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) | |
1183 | link_mode |= HCI_LM_ENCRYPT; | |
1184 | ||
1185 | if (test_bit(HCI_CONN_AUTH, &conn->flags)) | |
1186 | link_mode |= HCI_LM_AUTH; | |
1187 | ||
1188 | if (test_bit(HCI_CONN_SECURE, &conn->flags)) | |
1189 | link_mode |= HCI_LM_SECURE; | |
1190 | ||
1191 | if (test_bit(HCI_CONN_FIPS, &conn->flags)) | |
1192 | link_mode |= HCI_LM_FIPS; | |
1193 | ||
1194 | return link_mode; | |
1195 | } | |
1196 | ||
1da177e4 LT |
1197 | int hci_get_conn_list(void __user *arg) |
1198 | { | |
fc5fef61 | 1199 | struct hci_conn *c; |
1da177e4 LT |
1200 | struct hci_conn_list_req req, *cl; |
1201 | struct hci_conn_info *ci; | |
1202 | struct hci_dev *hdev; | |
1da177e4 LT |
1203 | int n = 0, size, err; |
1204 | ||
1205 | if (copy_from_user(&req, arg, sizeof(req))) | |
1206 | return -EFAULT; | |
1207 | ||
1208 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
1209 | return -EINVAL; | |
1210 | ||
1211 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
1212 | ||
70f23020 AE |
1213 | cl = kmalloc(size, GFP_KERNEL); |
1214 | if (!cl) | |
1da177e4 LT |
1215 | return -ENOMEM; |
1216 | ||
70f23020 AE |
1217 | hdev = hci_dev_get(req.dev_id); |
1218 | if (!hdev) { | |
1da177e4 LT |
1219 | kfree(cl); |
1220 | return -ENODEV; | |
1221 | } | |
1222 | ||
1223 | ci = cl->conn_info; | |
1224 | ||
09fd0de5 | 1225 | hci_dev_lock(hdev); |
8035ded4 | 1226 | list_for_each_entry(c, &hdev->conn_hash.list, list) { |
1da177e4 LT |
1227 | bacpy(&(ci + n)->bdaddr, &c->dst); |
1228 | (ci + n)->handle = c->handle; | |
1229 | (ci + n)->type = c->type; | |
1230 | (ci + n)->out = c->out; | |
1231 | (ci + n)->state = c->state; | |
4dae2798 | 1232 | (ci + n)->link_mode = get_link_mode(c); |
1da177e4 LT |
1233 | if (++n >= req.conn_num) |
1234 | break; | |
1235 | } | |
09fd0de5 | 1236 | hci_dev_unlock(hdev); |
1da177e4 LT |
1237 | |
1238 | cl->dev_id = hdev->id; | |
1239 | cl->conn_num = n; | |
1240 | size = sizeof(req) + n * sizeof(*ci); | |
1241 | ||
1242 | hci_dev_put(hdev); | |
1243 | ||
1244 | err = copy_to_user(arg, cl, size); | |
1245 | kfree(cl); | |
1246 | ||
1247 | return err ? -EFAULT : 0; | |
1248 | } | |
1249 | ||
1250 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
1251 | { | |
1252 | struct hci_conn_info_req req; | |
1253 | struct hci_conn_info ci; | |
1254 | struct hci_conn *conn; | |
1255 | char __user *ptr = arg + sizeof(req); | |
1256 | ||
1257 | if (copy_from_user(&req, arg, sizeof(req))) | |
1258 | return -EFAULT; | |
1259 | ||
09fd0de5 | 1260 | hci_dev_lock(hdev); |
1da177e4 LT |
1261 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); |
1262 | if (conn) { | |
1263 | bacpy(&ci.bdaddr, &conn->dst); | |
1264 | ci.handle = conn->handle; | |
1265 | ci.type = conn->type; | |
1266 | ci.out = conn->out; | |
1267 | ci.state = conn->state; | |
4dae2798 | 1268 | ci.link_mode = get_link_mode(conn); |
1da177e4 | 1269 | } |
09fd0de5 | 1270 | hci_dev_unlock(hdev); |
1da177e4 LT |
1271 | |
1272 | if (!conn) | |
1273 | return -ENOENT; | |
1274 | ||
1275 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
1276 | } | |
40be492f MH |
1277 | |
1278 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
1279 | { | |
1280 | struct hci_auth_info_req req; | |
1281 | struct hci_conn *conn; | |
1282 | ||
1283 | if (copy_from_user(&req, arg, sizeof(req))) | |
1284 | return -EFAULT; | |
1285 | ||
09fd0de5 | 1286 | hci_dev_lock(hdev); |
40be492f MH |
1287 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); |
1288 | if (conn) | |
1289 | req.type = conn->auth_type; | |
09fd0de5 | 1290 | hci_dev_unlock(hdev); |
40be492f MH |
1291 | |
1292 | if (!conn) | |
1293 | return -ENOENT; | |
1294 | ||
1295 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
1296 | } | |
73d80deb LAD |
1297 | |
1298 | struct hci_chan *hci_chan_create(struct hci_conn *conn) | |
1299 | { | |
1300 | struct hci_dev *hdev = conn->hdev; | |
1301 | struct hci_chan *chan; | |
1302 | ||
38b3fef1 | 1303 | BT_DBG("%s hcon %p", hdev->name, conn); |
73d80deb | 1304 | |
f94b665d JH |
1305 | if (test_bit(HCI_CONN_DROP, &conn->flags)) { |
1306 | BT_DBG("Refusing to create new hci_chan"); | |
1307 | return NULL; | |
1308 | } | |
1309 | ||
27f70f3e | 1310 | chan = kzalloc(sizeof(*chan), GFP_KERNEL); |
73d80deb LAD |
1311 | if (!chan) |
1312 | return NULL; | |
1313 | ||
6c388d32 | 1314 | chan->conn = hci_conn_get(conn); |
73d80deb | 1315 | skb_queue_head_init(&chan->data_q); |
168df8e5 | 1316 | chan->state = BT_CONNECTED; |
73d80deb | 1317 | |
8192edef | 1318 | list_add_rcu(&chan->list, &conn->chan_list); |
73d80deb LAD |
1319 | |
1320 | return chan; | |
1321 | } | |
1322 | ||
9472007c | 1323 | void hci_chan_del(struct hci_chan *chan) |
73d80deb LAD |
1324 | { |
1325 | struct hci_conn *conn = chan->conn; | |
1326 | struct hci_dev *hdev = conn->hdev; | |
1327 | ||
38b3fef1 | 1328 | BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan); |
73d80deb | 1329 | |
8192edef GP |
1330 | list_del_rcu(&chan->list); |
1331 | ||
1332 | synchronize_rcu(); | |
73d80deb | 1333 | |
bcbb655a | 1334 | /* Prevent new hci_chan's to be created for this hci_conn */ |
f94b665d | 1335 | set_bit(HCI_CONN_DROP, &conn->flags); |
b3ff670a | 1336 | |
6c388d32 | 1337 | hci_conn_put(conn); |
e9b02748 | 1338 | |
73d80deb LAD |
1339 | skb_queue_purge(&chan->data_q); |
1340 | kfree(chan); | |
73d80deb LAD |
1341 | } |
1342 | ||
2c33c06a | 1343 | void hci_chan_list_flush(struct hci_conn *conn) |
73d80deb | 1344 | { |
2a5a5ec6 | 1345 | struct hci_chan *chan, *n; |
73d80deb | 1346 | |
38b3fef1 | 1347 | BT_DBG("hcon %p", conn); |
73d80deb | 1348 | |
2a5a5ec6 | 1349 | list_for_each_entry_safe(chan, n, &conn->chan_list, list) |
73d80deb LAD |
1350 | hci_chan_del(chan); |
1351 | } | |
42c4e53e AE |
1352 | |
1353 | static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon, | |
1354 | __u16 handle) | |
1355 | { | |
1356 | struct hci_chan *hchan; | |
1357 | ||
1358 | list_for_each_entry(hchan, &hcon->chan_list, list) { | |
1359 | if (hchan->handle == handle) | |
1360 | return hchan; | |
1361 | } | |
1362 | ||
1363 | return NULL; | |
1364 | } | |
1365 | ||
1366 | struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle) | |
1367 | { | |
1368 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1369 | struct hci_conn *hcon; | |
1370 | struct hci_chan *hchan = NULL; | |
1371 | ||
1372 | rcu_read_lock(); | |
1373 | ||
1374 | list_for_each_entry_rcu(hcon, &h->list, list) { | |
1375 | hchan = __hci_chan_lookup_handle(hcon, handle); | |
1376 | if (hchan) | |
1377 | break; | |
1378 | } | |
1379 | ||
1380 | rcu_read_unlock(); | |
1381 | ||
1382 | return hchan; | |
1383 | } |