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 | ||
f75113a2 JP |
67 | /* This function requires the caller holds hdev->lock */ |
68 | static void hci_connect_le_scan_cleanup(struct hci_conn *conn) | |
69 | { | |
70 | struct hci_conn_params *params; | |
b5c2b621 | 71 | struct hci_dev *hdev = conn->hdev; |
f75113a2 JP |
72 | struct smp_irk *irk; |
73 | bdaddr_t *bdaddr; | |
74 | u8 bdaddr_type; | |
75 | ||
76 | bdaddr = &conn->dst; | |
77 | bdaddr_type = conn->dst_type; | |
78 | ||
79 | /* Check if we need to convert to identity address */ | |
b5c2b621 | 80 | irk = hci_get_irk(hdev, bdaddr, bdaddr_type); |
f75113a2 JP |
81 | if (irk) { |
82 | bdaddr = &irk->bdaddr; | |
83 | bdaddr_type = irk->addr_type; | |
84 | } | |
85 | ||
17bc08f0 JH |
86 | params = hci_pend_le_action_lookup(&hdev->pend_le_conns, bdaddr, |
87 | bdaddr_type); | |
88 | if (!params || !params->explicit_connect) | |
f75113a2 JP |
89 | return; |
90 | ||
91 | /* The connection attempt was doing scan for new RPA, and is | |
92 | * in scan phase. If params are not associated with any other | |
93 | * autoconnect action, remove them completely. If they are, just unmark | |
94 | * them as waiting for connection, by clearing explicit_connect field. | |
95 | */ | |
9ad3e6ff JH |
96 | params->explicit_connect = false; |
97 | ||
98 | list_del_init(¶ms->action); | |
99 | ||
100 | switch (params->auto_connect) { | |
101 | case HCI_AUTO_CONN_EXPLICIT: | |
b5c2b621 | 102 | hci_conn_params_del(hdev, bdaddr, bdaddr_type); |
9ad3e6ff JH |
103 | /* return instead of break to avoid duplicate scan update */ |
104 | return; | |
105 | case HCI_AUTO_CONN_DIRECT: | |
106 | case HCI_AUTO_CONN_ALWAYS: | |
b5c2b621 | 107 | list_add(¶ms->action, &hdev->pend_le_conns); |
9ad3e6ff JH |
108 | break; |
109 | case HCI_AUTO_CONN_REPORT: | |
b5c2b621 | 110 | list_add(¶ms->action, &hdev->pend_le_reports); |
9ad3e6ff JH |
111 | break; |
112 | default: | |
113 | break; | |
168b8a25 | 114 | } |
9ad3e6ff | 115 | |
b5c2b621 | 116 | hci_update_background_scan(hdev); |
f75113a2 JP |
117 | } |
118 | ||
b958f9a3 JH |
119 | static void hci_conn_cleanup(struct hci_conn *conn) |
120 | { | |
121 | struct hci_dev *hdev = conn->hdev; | |
122 | ||
123 | if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags)) | |
124 | hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type); | |
125 | ||
126 | hci_chan_list_flush(conn); | |
127 | ||
128 | hci_conn_hash_del(hdev, conn); | |
129 | ||
130 | if (hdev->notify) | |
131 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); | |
132 | ||
133 | hci_conn_del_sysfs(conn); | |
134 | ||
135 | debugfs_remove_recursive(conn->debugfs); | |
136 | ||
137 | hci_dev_put(hdev); | |
138 | ||
139 | hci_conn_put(conn); | |
140 | } | |
141 | ||
8ce783dc | 142 | static void le_scan_cleanup(struct work_struct *work) |
f75113a2 | 143 | { |
8ce783dc JH |
144 | struct hci_conn *conn = container_of(work, struct hci_conn, |
145 | le_scan_cleanup); | |
146 | struct hci_dev *hdev = conn->hdev; | |
147 | struct hci_conn *c = NULL; | |
148 | ||
149 | BT_DBG("%s hcon %p", hdev->name, conn); | |
150 | ||
151 | hci_dev_lock(hdev); | |
152 | ||
153 | /* Check that the hci_conn is still around */ | |
154 | rcu_read_lock(); | |
155 | list_for_each_entry_rcu(c, &hdev->conn_hash.list, list) { | |
156 | if (c == conn) | |
157 | break; | |
158 | } | |
159 | rcu_read_unlock(); | |
160 | ||
161 | if (c == conn) { | |
162 | hci_connect_le_scan_cleanup(conn); | |
163 | hci_conn_cleanup(conn); | |
164 | } | |
165 | ||
166 | hci_dev_unlock(hdev); | |
167 | hci_dev_put(hdev); | |
168 | hci_conn_put(conn); | |
169 | } | |
f75113a2 | 170 | |
8ce783dc JH |
171 | static void hci_connect_le_scan_remove(struct hci_conn *conn) |
172 | { | |
173 | BT_DBG("%s hcon %p", conn->hdev->name, conn); | |
174 | ||
175 | /* We can't call hci_conn_del/hci_conn_cleanup here since that | |
176 | * could deadlock with another hci_conn_del() call that's holding | |
177 | * hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work). | |
178 | * Instead, grab temporary extra references to the hci_dev and | |
179 | * hci_conn and perform the necessary cleanup in a separate work | |
180 | * callback. | |
b958f9a3 | 181 | */ |
8ce783dc JH |
182 | |
183 | hci_dev_hold(conn->hdev); | |
184 | hci_conn_get(conn); | |
185 | ||
186 | schedule_work(&conn->le_scan_cleanup); | |
f75113a2 JP |
187 | } |
188 | ||
1aef8669 | 189 | static void hci_acl_create_connection(struct hci_conn *conn) |
1da177e4 LT |
190 | { |
191 | struct hci_dev *hdev = conn->hdev; | |
192 | struct inquiry_entry *ie; | |
193 | struct hci_cp_create_conn cp; | |
194 | ||
42d2d87c | 195 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
196 | |
197 | conn->state = BT_CONNECT; | |
a0c808b3 | 198 | conn->out = true; |
40bef302 | 199 | conn->role = HCI_ROLE_MASTER; |
1da177e4 | 200 | |
4c67bc74 MH |
201 | conn->attempt++; |
202 | ||
e4e8e37c MH |
203 | conn->link_policy = hdev->link_policy; |
204 | ||
1da177e4 LT |
205 | memset(&cp, 0, sizeof(cp)); |
206 | bacpy(&cp.bdaddr, &conn->dst); | |
207 | cp.pscan_rep_mode = 0x02; | |
208 | ||
70f23020 AE |
209 | ie = hci_inquiry_cache_lookup(hdev, &conn->dst); |
210 | if (ie) { | |
41a96212 MH |
211 | if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { |
212 | cp.pscan_rep_mode = ie->data.pscan_rep_mode; | |
213 | cp.pscan_mode = ie->data.pscan_mode; | |
214 | cp.clock_offset = ie->data.clock_offset | | |
dcf4adbf | 215 | cpu_to_le16(0x8000); |
41a96212 MH |
216 | } |
217 | ||
1da177e4 | 218 | memcpy(conn->dev_class, ie->data.dev_class, 3); |
58a681ef JH |
219 | if (ie->data.ssp_mode > 0) |
220 | set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); | |
1da177e4 LT |
221 | } |
222 | ||
a8746417 | 223 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 224 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) |
b6a0dc82 | 225 | cp.role_switch = 0x01; |
1da177e4 | 226 | else |
b6a0dc82 | 227 | cp.role_switch = 0x00; |
4c67bc74 | 228 | |
a9de9248 | 229 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); |
1da177e4 LT |
230 | } |
231 | ||
1aef8669 | 232 | static void hci_acl_create_connection_cancel(struct hci_conn *conn) |
6ac59344 MH |
233 | { |
234 | struct hci_cp_create_conn_cancel cp; | |
235 | ||
38b3fef1 | 236 | BT_DBG("hcon %p", conn); |
6ac59344 | 237 | |
d095c1eb | 238 | if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2) |
6ac59344 MH |
239 | return; |
240 | ||
241 | bacpy(&cp.bdaddr, &conn->dst); | |
a9de9248 | 242 | hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); |
6ac59344 MH |
243 | } |
244 | ||
93796fa6 CT |
245 | static void hci_reject_sco(struct hci_conn *conn) |
246 | { | |
247 | struct hci_cp_reject_sync_conn_req cp; | |
248 | ||
d41c15cf | 249 | cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES; |
93796fa6 CT |
250 | bacpy(&cp.bdaddr, &conn->dst); |
251 | ||
252 | hci_send_cmd(conn->hdev, HCI_OP_REJECT_SYNC_CONN_REQ, sizeof(cp), &cp); | |
253 | } | |
254 | ||
e3b679d5 | 255 | int hci_disconnect(struct hci_conn *conn, __u8 reason) |
1da177e4 LT |
256 | { |
257 | struct hci_cp_disconnect cp; | |
258 | ||
38b3fef1 | 259 | BT_DBG("hcon %p", conn); |
1da177e4 | 260 | |
839035a7 JH |
261 | /* When we are master of an established connection and it enters |
262 | * the disconnect timeout, then go ahead and try to read the | |
263 | * current clock offset. Processing of the result is done | |
264 | * within the event handling and hci_clock_offset_evt function. | |
265 | */ | |
266 | if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER) { | |
267 | struct hci_dev *hdev = conn->hdev; | |
4f639ede | 268 | struct hci_cp_read_clock_offset clkoff_cp; |
839035a7 | 269 | |
4f639ede FF |
270 | clkoff_cp.handle = cpu_to_le16(conn->handle); |
271 | hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp), | |
272 | &clkoff_cp); | |
839035a7 JH |
273 | } |
274 | ||
1da177e4 LT |
275 | conn->state = BT_DISCONN; |
276 | ||
aca3192c | 277 | cp.handle = cpu_to_le16(conn->handle); |
1da177e4 | 278 | cp.reason = reason; |
e3b679d5 | 279 | return hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); |
1da177e4 LT |
280 | } |
281 | ||
a2b1976b | 282 | static void hci_amp_disconn(struct hci_conn *conn) |
53502d69 AE |
283 | { |
284 | struct hci_cp_disconn_phy_link cp; | |
285 | ||
286 | BT_DBG("hcon %p", conn); | |
287 | ||
288 | conn->state = BT_DISCONN; | |
289 | ||
290 | cp.phy_handle = HCI_PHY_HANDLE(conn->handle); | |
a2b1976b | 291 | cp.reason = hci_proto_disconn_ind(conn); |
53502d69 AE |
292 | hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK, |
293 | sizeof(cp), &cp); | |
294 | } | |
295 | ||
57f5d0d1 | 296 | static void hci_add_sco(struct hci_conn *conn, __u16 handle) |
1da177e4 LT |
297 | { |
298 | struct hci_dev *hdev = conn->hdev; | |
299 | struct hci_cp_add_sco cp; | |
300 | ||
38b3fef1 | 301 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
302 | |
303 | conn->state = BT_CONNECT; | |
a0c808b3 | 304 | conn->out = true; |
1da177e4 | 305 | |
efc7688b MH |
306 | conn->attempt++; |
307 | ||
aca3192c | 308 | cp.handle = cpu_to_le16(handle); |
a8746417 | 309 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 310 | |
a9de9248 | 311 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); |
1da177e4 LT |
312 | } |
313 | ||
2dea632f | 314 | bool hci_setup_sync(struct hci_conn *conn, __u16 handle) |
b6a0dc82 MH |
315 | { |
316 | struct hci_dev *hdev = conn->hdev; | |
317 | struct hci_cp_setup_sync_conn cp; | |
2dea632f | 318 | const struct sco_param *param; |
b6a0dc82 | 319 | |
38b3fef1 | 320 | BT_DBG("hcon %p", conn); |
b6a0dc82 MH |
321 | |
322 | conn->state = BT_CONNECT; | |
a0c808b3 | 323 | conn->out = true; |
b6a0dc82 | 324 | |
efc7688b MH |
325 | conn->attempt++; |
326 | ||
b6a0dc82 | 327 | cp.handle = cpu_to_le16(handle); |
b6a0dc82 | 328 | |
dcf4adbf JP |
329 | cp.tx_bandwidth = cpu_to_le32(0x00001f40); |
330 | cp.rx_bandwidth = cpu_to_le32(0x00001f40); | |
10c62ddc FD |
331 | cp.voice_setting = cpu_to_le16(conn->setting); |
332 | ||
333 | switch (conn->setting & SCO_AIRMODE_MASK) { | |
334 | case SCO_AIRMODE_TRANSP: | |
565766b0 | 335 | if (conn->attempt > ARRAY_SIZE(esco_param_msbc)) |
2dea632f | 336 | return false; |
565766b0 | 337 | param = &esco_param_msbc[conn->attempt - 1]; |
10c62ddc FD |
338 | break; |
339 | case SCO_AIRMODE_CVSD: | |
48e68ff5 BT |
340 | if (lmp_esco_capable(conn->link)) { |
341 | if (conn->attempt > ARRAY_SIZE(esco_param_cvsd)) | |
342 | return false; | |
48e68ff5 BT |
343 | param = &esco_param_cvsd[conn->attempt - 1]; |
344 | } else { | |
345 | if (conn->attempt > ARRAY_SIZE(sco_param_cvsd)) | |
346 | return false; | |
48e68ff5 BT |
347 | param = &sco_param_cvsd[conn->attempt - 1]; |
348 | } | |
10c62ddc | 349 | break; |
2dea632f FD |
350 | default: |
351 | return false; | |
10c62ddc | 352 | } |
b6a0dc82 | 353 | |
c7da5797 | 354 | cp.retrans_effort = param->retrans_effort; |
2dea632f FD |
355 | cp.pkt_type = __cpu_to_le16(param->pkt_type); |
356 | cp.max_latency = __cpu_to_le16(param->max_latency); | |
357 | ||
358 | if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0) | |
359 | return false; | |
360 | ||
361 | return true; | |
b6a0dc82 MH |
362 | } |
363 | ||
7d6ca693 JH |
364 | u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency, |
365 | u16 to_multiplier) | |
2ce603eb | 366 | { |
2ce603eb | 367 | struct hci_dev *hdev = conn->hdev; |
f044eb05 MH |
368 | struct hci_conn_params *params; |
369 | struct hci_cp_le_conn_update cp; | |
2ce603eb | 370 | |
f044eb05 | 371 | hci_dev_lock(hdev); |
2ce603eb | 372 | |
f044eb05 MH |
373 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); |
374 | if (params) { | |
375 | params->conn_min_interval = min; | |
376 | params->conn_max_interval = max; | |
377 | params->conn_latency = latency; | |
378 | params->supervision_timeout = to_multiplier; | |
379 | } | |
380 | ||
381 | hci_dev_unlock(hdev); | |
382 | ||
383 | memset(&cp, 0, sizeof(cp)); | |
2ce603eb CT |
384 | cp.handle = cpu_to_le16(conn->handle); |
385 | cp.conn_interval_min = cpu_to_le16(min); | |
386 | cp.conn_interval_max = cpu_to_le16(max); | |
387 | cp.conn_latency = cpu_to_le16(latency); | |
388 | cp.supervision_timeout = cpu_to_le16(to_multiplier); | |
dcf4adbf JP |
389 | cp.min_ce_len = cpu_to_le16(0x0000); |
390 | cp.max_ce_len = cpu_to_le16(0x0000); | |
2ce603eb CT |
391 | |
392 | hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); | |
7d6ca693 JH |
393 | |
394 | if (params) | |
395 | return 0x01; | |
396 | ||
397 | return 0x00; | |
2ce603eb | 398 | } |
2ce603eb | 399 | |
fe39c7b2 | 400 | void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand, |
8b76ce34 | 401 | __u8 ltk[16], __u8 key_size) |
a7a595f6 VCG |
402 | { |
403 | struct hci_dev *hdev = conn->hdev; | |
404 | struct hci_cp_le_start_enc cp; | |
405 | ||
38b3fef1 | 406 | BT_DBG("hcon %p", conn); |
a7a595f6 VCG |
407 | |
408 | memset(&cp, 0, sizeof(cp)); | |
409 | ||
410 | cp.handle = cpu_to_le16(conn->handle); | |
fe39c7b2 | 411 | cp.rand = rand; |
a7a595f6 | 412 | cp.ediv = ediv; |
8b76ce34 | 413 | memcpy(cp.ltk, ltk, key_size); |
a7a595f6 VCG |
414 | |
415 | hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); | |
416 | } | |
a7a595f6 | 417 | |
e73439d8 MH |
418 | /* Device _must_ be locked */ |
419 | void hci_sco_setup(struct hci_conn *conn, __u8 status) | |
420 | { | |
421 | struct hci_conn *sco = conn->link; | |
422 | ||
e73439d8 MH |
423 | if (!sco) |
424 | return; | |
425 | ||
38b3fef1 AE |
426 | BT_DBG("hcon %p", conn); |
427 | ||
e73439d8 MH |
428 | if (!status) { |
429 | if (lmp_esco_capable(conn->hdev)) | |
430 | hci_setup_sync(sco, conn->handle); | |
431 | else | |
432 | hci_add_sco(sco, conn->handle); | |
433 | } else { | |
539c496d | 434 | hci_connect_cfm(sco, status); |
e73439d8 MH |
435 | hci_conn_del(sco); |
436 | } | |
437 | } | |
438 | ||
19c40e3b | 439 | static void hci_conn_timeout(struct work_struct *work) |
1da177e4 | 440 | { |
19c40e3b | 441 | struct hci_conn *conn = container_of(work, struct hci_conn, |
5974e4c4 | 442 | disc_work.work); |
1d56dc4f | 443 | int refcnt = atomic_read(&conn->refcnt); |
1da177e4 | 444 | |
38b3fef1 | 445 | BT_DBG("hcon %p state %s", conn, state_to_string(conn->state)); |
1da177e4 | 446 | |
1d56dc4f LR |
447 | WARN_ON(refcnt < 0); |
448 | ||
449 | /* FIXME: It was observed that in pairing failed scenario, refcnt | |
450 | * drops below 0. Probably this is because l2cap_conn_del calls | |
451 | * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is | |
452 | * dropped. After that loop hci_chan_del is called which also drops | |
453 | * conn. For now make sure that ACL is alive if refcnt is higher then 0, | |
454 | * otherwise drop it. | |
455 | */ | |
456 | if (refcnt > 0) | |
1da177e4 LT |
457 | return; |
458 | ||
6ac59344 MH |
459 | switch (conn->state) { |
460 | case BT_CONNECT: | |
769be974 | 461 | case BT_CONNECT2: |
fcd89c09 VT |
462 | if (conn->out) { |
463 | if (conn->type == ACL_LINK) | |
1aef8669 | 464 | hci_acl_create_connection_cancel(conn); |
cc2b6911 JP |
465 | else if (conn->type == LE_LINK) { |
466 | if (test_bit(HCI_CONN_SCANNING, &conn->flags)) | |
467 | hci_connect_le_scan_remove(conn); | |
468 | else | |
469 | hci_le_create_connection_cancel(conn); | |
470 | } | |
93796fa6 CT |
471 | } else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) { |
472 | hci_reject_sco(conn); | |
fcd89c09 | 473 | } |
6ac59344 | 474 | break; |
769be974 | 475 | case BT_CONFIG: |
8e87d142 | 476 | case BT_CONNECTED: |
40051e46 MH |
477 | if (conn->type == AMP_LINK) { |
478 | hci_amp_disconn(conn); | |
479 | } else { | |
480 | __u8 reason = hci_proto_disconn_ind(conn); | |
481 | hci_disconnect(conn, reason); | |
482 | } | |
6ac59344 MH |
483 | break; |
484 | default: | |
1da177e4 | 485 | conn->state = BT_CLOSED; |
6ac59344 MH |
486 | break; |
487 | } | |
1da177e4 LT |
488 | } |
489 | ||
416dc94b | 490 | /* Enter sniff mode */ |
a74a84f6 | 491 | static void hci_conn_idle(struct work_struct *work) |
416dc94b | 492 | { |
a74a84f6 JH |
493 | struct hci_conn *conn = container_of(work, struct hci_conn, |
494 | idle_work.work); | |
416dc94b GP |
495 | struct hci_dev *hdev = conn->hdev; |
496 | ||
38b3fef1 | 497 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
416dc94b | 498 | |
416dc94b GP |
499 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) |
500 | return; | |
501 | ||
502 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
503 | return; | |
504 | ||
505 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
506 | struct hci_cp_sniff_subrate cp; | |
507 | cp.handle = cpu_to_le16(conn->handle); | |
dcf4adbf JP |
508 | cp.max_latency = cpu_to_le16(0); |
509 | cp.min_remote_timeout = cpu_to_le16(0); | |
510 | cp.min_local_timeout = cpu_to_le16(0); | |
416dc94b GP |
511 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); |
512 | } | |
513 | ||
51a8efd7 | 514 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
416dc94b GP |
515 | struct hci_cp_sniff_mode cp; |
516 | cp.handle = cpu_to_le16(conn->handle); | |
517 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
518 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
dcf4adbf JP |
519 | cp.attempt = cpu_to_le16(4); |
520 | cp.timeout = cpu_to_le16(1); | |
416dc94b GP |
521 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); |
522 | } | |
523 | } | |
524 | ||
7bc18d9d | 525 | static void hci_conn_auto_accept(struct work_struct *work) |
9f61656a | 526 | { |
7bc18d9d JH |
527 | struct hci_conn *conn = container_of(work, struct hci_conn, |
528 | auto_accept_work.work); | |
9f61656a | 529 | |
7bc18d9d | 530 | hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), |
5974e4c4 | 531 | &conn->dst); |
9f61656a JH |
532 | } |
533 | ||
9489eca4 JH |
534 | static void le_conn_timeout(struct work_struct *work) |
535 | { | |
536 | struct hci_conn *conn = container_of(work, struct hci_conn, | |
537 | le_conn_timeout.work); | |
3c857757 | 538 | struct hci_dev *hdev = conn->hdev; |
9489eca4 JH |
539 | |
540 | BT_DBG(""); | |
541 | ||
3c857757 JH |
542 | /* We could end up here due to having done directed advertising, |
543 | * so clean up the state if necessary. This should however only | |
544 | * happen with broken hardware or if low duty cycle was used | |
545 | * (which doesn't have a timeout of its own). | |
546 | */ | |
0b1db38c | 547 | if (conn->role == HCI_ROLE_SLAVE) { |
3c857757 JH |
548 | u8 enable = 0x00; |
549 | hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), | |
550 | &enable); | |
551 | hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT); | |
552 | return; | |
553 | } | |
554 | ||
9489eca4 JH |
555 | hci_le_create_connection_cancel(conn); |
556 | } | |
557 | ||
a5c4e309 JH |
558 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst, |
559 | u8 role) | |
1da177e4 LT |
560 | { |
561 | struct hci_conn *conn; | |
562 | ||
6ed93dc6 | 563 | BT_DBG("%s dst %pMR", hdev->name, dst); |
1da177e4 | 564 | |
27f70f3e | 565 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
04837f64 | 566 | if (!conn) |
1da177e4 | 567 | return NULL; |
1da177e4 LT |
568 | |
569 | bacpy(&conn->dst, dst); | |
662e8820 | 570 | bacpy(&conn->src, &hdev->bdaddr); |
a8746417 MH |
571 | conn->hdev = hdev; |
572 | conn->type = type; | |
a5c4e309 | 573 | conn->role = role; |
a8746417 MH |
574 | conn->mode = HCI_CM_ACTIVE; |
575 | conn->state = BT_OPEN; | |
93f19c9f | 576 | conn->auth_type = HCI_AT_GENERAL_BONDING; |
17fa4b9d | 577 | conn->io_capability = hdev->io_capability; |
a9583556 | 578 | conn->remote_auth = 0xff; |
13d39315 | 579 | conn->key_type = 0xff; |
ebf86aa3 | 580 | conn->rssi = HCI_RSSI_INVALID; |
5a134fae | 581 | conn->tx_power = HCI_TX_POWER_INVALID; |
d0455ed9 | 582 | conn->max_tx_power = HCI_TX_POWER_INVALID; |
1da177e4 | 583 | |
58a681ef | 584 | set_bit(HCI_CONN_POWER_SAVE, &conn->flags); |
052b30b0 | 585 | conn->disc_timeout = HCI_DISCONN_TIMEOUT; |
04837f64 | 586 | |
a5c4e309 JH |
587 | if (conn->role == HCI_ROLE_MASTER) |
588 | conn->out = true; | |
589 | ||
a8746417 MH |
590 | switch (type) { |
591 | case ACL_LINK: | |
592 | conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; | |
593 | break; | |
9c84d1da JH |
594 | case LE_LINK: |
595 | /* conn->src should reflect the local identity address */ | |
596 | hci_copy_identity_address(hdev, &conn->src, &conn->src_type); | |
597 | break; | |
a8746417 MH |
598 | case SCO_LINK: |
599 | if (lmp_esco_capable(hdev)) | |
efc7688b MH |
600 | conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | |
601 | (hdev->esco_type & EDR_ESCO_MASK); | |
a8746417 MH |
602 | else |
603 | conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; | |
604 | break; | |
605 | case ESCO_LINK: | |
efc7688b | 606 | conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; |
a8746417 MH |
607 | break; |
608 | } | |
609 | ||
1da177e4 | 610 | skb_queue_head_init(&conn->data_q); |
04837f64 | 611 | |
70c1f20b | 612 | INIT_LIST_HEAD(&conn->chan_list); |
73d80deb | 613 | |
19c40e3b | 614 | INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout); |
7bc18d9d | 615 | INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept); |
a74a84f6 | 616 | INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle); |
9489eca4 | 617 | INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout); |
8ce783dc | 618 | INIT_WORK(&conn->le_scan_cleanup, le_scan_cleanup); |
1da177e4 LT |
619 | |
620 | atomic_set(&conn->refcnt, 0); | |
621 | ||
622 | hci_dev_hold(hdev); | |
623 | ||
1da177e4 | 624 | hci_conn_hash_add(hdev, conn); |
3c54711c | 625 | if (hdev->notify) |
1da177e4 LT |
626 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); |
627 | ||
a67e899c MH |
628 | hci_conn_init_sysfs(conn); |
629 | ||
1da177e4 LT |
630 | return conn; |
631 | } | |
632 | ||
633 | int hci_conn_del(struct hci_conn *conn) | |
634 | { | |
635 | struct hci_dev *hdev = conn->hdev; | |
636 | ||
38b3fef1 | 637 | BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle); |
1da177e4 | 638 | |
19c40e3b | 639 | cancel_delayed_work_sync(&conn->disc_work); |
7bc18d9d | 640 | cancel_delayed_work_sync(&conn->auto_accept_work); |
a74a84f6 | 641 | cancel_delayed_work_sync(&conn->idle_work); |
9f61656a | 642 | |
5b7f9909 | 643 | if (conn->type == ACL_LINK) { |
1da177e4 LT |
644 | struct hci_conn *sco = conn->link; |
645 | if (sco) | |
646 | sco->link = NULL; | |
647 | ||
648 | /* Unacked frames */ | |
649 | hdev->acl_cnt += conn->sent; | |
6ed58ec5 | 650 | } else if (conn->type == LE_LINK) { |
980ffc0a | 651 | cancel_delayed_work(&conn->le_conn_timeout); |
9489eca4 | 652 | |
6ed58ec5 VT |
653 | if (hdev->le_pkts) |
654 | hdev->le_cnt += conn->sent; | |
655 | else | |
656 | hdev->acl_cnt += conn->sent; | |
5b7f9909 MH |
657 | } else { |
658 | struct hci_conn *acl = conn->link; | |
659 | if (acl) { | |
660 | acl->link = NULL; | |
76a68ba0 | 661 | hci_conn_drop(acl); |
5b7f9909 | 662 | } |
1da177e4 LT |
663 | } |
664 | ||
9740e49d AE |
665 | if (conn->amp_mgr) |
666 | amp_mgr_put(conn->amp_mgr); | |
667 | ||
1da177e4 | 668 | skb_queue_purge(&conn->data_q); |
1da177e4 | 669 | |
b958f9a3 JH |
670 | /* Remove the connection from the list and cleanup its remaining |
671 | * state. This is a separate function since for some cases like | |
672 | * BT_CONNECT_SCAN we *only* want the cleanup part without the | |
673 | * rest of hci_conn_del. | |
674 | */ | |
675 | hci_conn_cleanup(conn); | |
163f4dab | 676 | |
1da177e4 LT |
677 | return 0; |
678 | } | |
679 | ||
680 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
681 | { | |
682 | int use_src = bacmp(src, BDADDR_ANY); | |
8035ded4 | 683 | struct hci_dev *hdev = NULL, *d; |
1da177e4 | 684 | |
6ed93dc6 | 685 | BT_DBG("%pMR -> %pMR", src, dst); |
1da177e4 | 686 | |
f20d09d5 | 687 | read_lock(&hci_dev_list_lock); |
1da177e4 | 688 | |
8035ded4 | 689 | list_for_each_entry(d, &hci_dev_list, list) { |
8fc9ced3 | 690 | if (!test_bit(HCI_UP, &d->flags) || |
d7a5a11d | 691 | hci_dev_test_flag(d, HCI_USER_CHANNEL) || |
d300fa9b | 692 | d->dev_type != HCI_BREDR) |
1da177e4 LT |
693 | continue; |
694 | ||
8e87d142 | 695 | /* Simple routing: |
1da177e4 LT |
696 | * No source address - find interface with bdaddr != dst |
697 | * Source address - find interface with bdaddr == src | |
698 | */ | |
699 | ||
700 | if (use_src) { | |
701 | if (!bacmp(&d->bdaddr, src)) { | |
702 | hdev = d; break; | |
703 | } | |
704 | } else { | |
705 | if (bacmp(&d->bdaddr, dst)) { | |
706 | hdev = d; break; | |
707 | } | |
708 | } | |
709 | } | |
710 | ||
711 | if (hdev) | |
712 | hdev = hci_dev_hold(hdev); | |
713 | ||
f20d09d5 | 714 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
715 | return hdev; |
716 | } | |
717 | EXPORT_SYMBOL(hci_get_route); | |
718 | ||
9bb3c01f | 719 | /* This function requires the caller holds hdev->lock */ |
06c053fb | 720 | void hci_le_conn_failed(struct hci_conn *conn, u8 status) |
9bb3c01f AG |
721 | { |
722 | struct hci_dev *hdev = conn->hdev; | |
f161dd41 JH |
723 | struct hci_conn_params *params; |
724 | ||
725 | params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst, | |
726 | conn->dst_type); | |
727 | if (params && params->conn) { | |
728 | hci_conn_drop(params->conn); | |
f8aaf9b6 | 729 | hci_conn_put(params->conn); |
f161dd41 JH |
730 | params->conn = NULL; |
731 | } | |
9bb3c01f AG |
732 | |
733 | conn->state = BT_CLOSED; | |
734 | ||
735 | mgmt_connect_failed(hdev, &conn->dst, conn->type, conn->dst_type, | |
736 | status); | |
737 | ||
539c496d | 738 | hci_connect_cfm(conn, status); |
9bb3c01f AG |
739 | |
740 | hci_conn_del(conn); | |
a4790dbd AG |
741 | |
742 | /* Since we may have temporarily stopped the background scanning in | |
743 | * favor of connection establishment, we should restart it. | |
744 | */ | |
745 | hci_update_background_scan(hdev); | |
3c857757 JH |
746 | |
747 | /* Re-enable advertising in case this was a failed connection | |
748 | * attempt as a peripheral. | |
749 | */ | |
750 | mgmt_reenable_advertising(hdev); | |
9bb3c01f AG |
751 | } |
752 | ||
1904a853 | 753 | static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode) |
1d399ae5 AG |
754 | { |
755 | struct hci_conn *conn; | |
756 | ||
28a667c9 JP |
757 | hci_dev_lock(hdev); |
758 | ||
759 | conn = hci_lookup_le_connect(hdev); | |
760 | ||
761 | if (!status) { | |
762 | hci_connect_le_scan_cleanup(conn); | |
763 | goto done; | |
764 | } | |
1d399ae5 AG |
765 | |
766 | BT_ERR("HCI request failed to create LE connection: status 0x%2.2x", | |
767 | status); | |
768 | ||
1d399ae5 AG |
769 | if (!conn) |
770 | goto done; | |
771 | ||
06c053fb | 772 | hci_le_conn_failed(conn, status); |
1d399ae5 AG |
773 | |
774 | done: | |
775 | hci_dev_unlock(hdev); | |
776 | } | |
777 | ||
2acf3d90 AG |
778 | static void hci_req_add_le_create_conn(struct hci_request *req, |
779 | struct hci_conn *conn) | |
780 | { | |
781 | struct hci_cp_le_create_conn cp; | |
782 | struct hci_dev *hdev = conn->hdev; | |
783 | u8 own_addr_type; | |
784 | ||
785 | memset(&cp, 0, sizeof(cp)); | |
786 | ||
787 | /* Update random address, but set require_privacy to false so | |
9437d2ed | 788 | * that we never connect with an non-resolvable address. |
2acf3d90 AG |
789 | */ |
790 | if (hci_update_random_address(req, false, &own_addr_type)) | |
791 | return; | |
792 | ||
2acf3d90 AG |
793 | cp.scan_interval = cpu_to_le16(hdev->le_scan_interval); |
794 | cp.scan_window = cpu_to_le16(hdev->le_scan_window); | |
795 | bacpy(&cp.peer_addr, &conn->dst); | |
796 | cp.peer_addr_type = conn->dst_type; | |
797 | cp.own_address_type = own_addr_type; | |
798 | cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval); | |
799 | cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval); | |
037fc415 MH |
800 | cp.conn_latency = cpu_to_le16(conn->le_conn_latency); |
801 | cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout); | |
dcf4adbf JP |
802 | cp.min_ce_len = cpu_to_le16(0x0000); |
803 | cp.max_ce_len = cpu_to_le16(0x0000); | |
2acf3d90 AG |
804 | |
805 | hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); | |
b46e0030 JH |
806 | |
807 | conn->state = BT_CONNECT; | |
28a667c9 | 808 | clear_bit(HCI_CONN_SCANNING, &conn->flags); |
2acf3d90 AG |
809 | } |
810 | ||
3c857757 JH |
811 | static void hci_req_directed_advertising(struct hci_request *req, |
812 | struct hci_conn *conn) | |
813 | { | |
814 | struct hci_dev *hdev = req->hdev; | |
815 | struct hci_cp_le_set_adv_param cp; | |
816 | u8 own_addr_type; | |
817 | u8 enable; | |
818 | ||
5ce194c4 | 819 | /* Clear the HCI_LE_ADV bit temporarily so that the |
3c857757 JH |
820 | * hci_update_random_address knows that it's safe to go ahead |
821 | * and write a new random address. The flag will be set back on | |
822 | * as soon as the SET_ADV_ENABLE HCI command completes. | |
823 | */ | |
a358dc11 | 824 | hci_dev_clear_flag(hdev, HCI_LE_ADV); |
3c857757 JH |
825 | |
826 | /* Set require_privacy to false so that the remote device has a | |
827 | * chance of identifying us. | |
828 | */ | |
829 | if (hci_update_random_address(req, false, &own_addr_type) < 0) | |
830 | return; | |
831 | ||
832 | memset(&cp, 0, sizeof(cp)); | |
833 | cp.type = LE_ADV_DIRECT_IND; | |
834 | cp.own_address_type = own_addr_type; | |
835 | cp.direct_addr_type = conn->dst_type; | |
836 | bacpy(&cp.direct_addr, &conn->dst); | |
837 | cp.channel_map = hdev->le_adv_channel_map; | |
838 | ||
839 | hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp); | |
840 | ||
841 | enable = 0x01; | |
842 | hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable); | |
843 | ||
844 | conn->state = BT_CONNECT; | |
845 | } | |
846 | ||
04a6c589 | 847 | struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, |
cdd6275e | 848 | u8 dst_type, u8 sec_level, u16 conn_timeout, |
e804d25d | 849 | u8 role) |
1da177e4 | 850 | { |
4292f1f3 | 851 | struct hci_conn_params *params; |
28a667c9 | 852 | struct hci_conn *conn, *conn_unfinished; |
1ebfcc1f | 853 | struct smp_irk *irk; |
2acf3d90 | 854 | struct hci_request req; |
1d399ae5 | 855 | int err; |
1da177e4 | 856 | |
152d386e | 857 | /* Let's make sure that le is enabled.*/ |
d7a5a11d | 858 | if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { |
152d386e LR |
859 | if (lmp_le_capable(hdev)) |
860 | return ERR_PTR(-ECONNREFUSED); | |
861 | ||
862 | return ERR_PTR(-EOPNOTSUPP); | |
863 | } | |
864 | ||
620ad521 AG |
865 | /* Some devices send ATT messages as soon as the physical link is |
866 | * established. To be able to handle these ATT messages, the user- | |
867 | * space first establishes the connection and then starts the pairing | |
868 | * process. | |
869 | * | |
870 | * So if a hci_conn object already exists for the following connection | |
871 | * attempt, we simply update pending_sec_level and auth_type fields | |
872 | * and return the object found. | |
873 | */ | |
9d4c1cc1 | 874 | conn = hci_conn_hash_lookup_le(hdev, dst, dst_type); |
28a667c9 | 875 | conn_unfinished = NULL; |
620ad521 | 876 | if (conn) { |
28a667c9 JP |
877 | if (conn->state == BT_CONNECT && |
878 | test_bit(HCI_CONN_SCANNING, &conn->flags)) { | |
879 | BT_DBG("will continue unfinished conn %pMR", dst); | |
880 | conn_unfinished = conn; | |
881 | } else { | |
882 | if (conn->pending_sec_level < sec_level) | |
883 | conn->pending_sec_level = sec_level; | |
884 | goto done; | |
885 | } | |
620ad521 | 886 | } |
dfc94dbd | 887 | |
620ad521 AG |
888 | /* Since the controller supports only one LE connection attempt at a |
889 | * time, we return -EBUSY if there is any connection attempt running. | |
890 | */ | |
e7d9ab73 | 891 | if (hci_lookup_le_connect(hdev)) |
620ad521 | 892 | return ERR_PTR(-EBUSY); |
46a190cb | 893 | |
edb4b466 MH |
894 | /* When given an identity address with existing identity |
895 | * resolving key, the connection needs to be established | |
896 | * to a resolvable random address. | |
897 | * | |
edb4b466 MH |
898 | * Storing the resolvable random address is required here |
899 | * to handle connection failures. The address will later | |
900 | * be resolved back into the original identity address | |
901 | * from the connect request. | |
902 | */ | |
1ebfcc1f JH |
903 | irk = hci_find_irk_by_addr(hdev, dst, dst_type); |
904 | if (irk && bacmp(&irk->rpa, BDADDR_ANY)) { | |
905 | dst = &irk->rpa; | |
906 | dst_type = ADDR_LE_DEV_RANDOM; | |
907 | } | |
908 | ||
28a667c9 JP |
909 | if (conn_unfinished) { |
910 | conn = conn_unfinished; | |
911 | bacpy(&conn->dst, dst); | |
912 | } else { | |
913 | conn = hci_conn_add(hdev, LE_LINK, dst, role); | |
914 | } | |
915 | ||
620ad521 AG |
916 | if (!conn) |
917 | return ERR_PTR(-ENOMEM); | |
9f0caeb1 | 918 | |
1ebfcc1f | 919 | conn->dst_type = dst_type; |
620ad521 | 920 | conn->sec_level = BT_SECURITY_LOW; |
09ae260b | 921 | conn->conn_timeout = conn_timeout; |
4292f1f3 | 922 | |
28a667c9 JP |
923 | if (!conn_unfinished) |
924 | conn->pending_sec_level = sec_level; | |
925 | ||
3c857757 JH |
926 | hci_req_init(&req, hdev); |
927 | ||
376f54c1 JH |
928 | /* Disable advertising if we're active. For master role |
929 | * connections most controllers will refuse to connect if | |
930 | * advertising is enabled, and for slave role connections we | |
931 | * anyway have to disable it in order to start directed | |
932 | * advertising. | |
933 | */ | |
d7a5a11d | 934 | if (hci_dev_test_flag(hdev, HCI_LE_ADV)) { |
376f54c1 JH |
935 | u8 enable = 0x00; |
936 | hci_req_add(&req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), | |
937 | &enable); | |
938 | } | |
939 | ||
cdd6275e | 940 | /* If requested to connect as slave use directed advertising */ |
e804d25d | 941 | if (conn->role == HCI_ROLE_SLAVE) { |
e8bb6b97 JH |
942 | /* If we're active scanning most controllers are unable |
943 | * to initiate advertising. Simply reject the attempt. | |
944 | */ | |
d7a5a11d | 945 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN) && |
e8bb6b97 JH |
946 | hdev->le_scan_type == LE_SCAN_ACTIVE) { |
947 | skb_queue_purge(&req.cmd_q); | |
948 | hci_conn_del(conn); | |
949 | return ERR_PTR(-EBUSY); | |
950 | } | |
951 | ||
3c857757 JH |
952 | hci_req_directed_advertising(&req, conn); |
953 | goto create_conn; | |
954 | } | |
955 | ||
4292f1f3 AG |
956 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); |
957 | if (params) { | |
958 | conn->le_conn_min_interval = params->conn_min_interval; | |
959 | conn->le_conn_max_interval = params->conn_max_interval; | |
037fc415 MH |
960 | conn->le_conn_latency = params->conn_latency; |
961 | conn->le_supv_timeout = params->supervision_timeout; | |
4292f1f3 AG |
962 | } else { |
963 | conn->le_conn_min_interval = hdev->le_conn_min_interval; | |
964 | conn->le_conn_max_interval = hdev->le_conn_max_interval; | |
04fb7d90 MH |
965 | conn->le_conn_latency = hdev->le_conn_latency; |
966 | conn->le_supv_timeout = hdev->le_supv_timeout; | |
4292f1f3 | 967 | } |
eda42b50 | 968 | |
2acf3d90 | 969 | /* If controller is scanning, we stop it since some controllers are |
81ad6fd9 JH |
970 | * not able to scan and connect at the same time. Also set the |
971 | * HCI_LE_SCAN_INTERRUPTED flag so that the command complete | |
972 | * handler for scan disabling knows to set the correct discovery | |
973 | * state. | |
2acf3d90 | 974 | */ |
d7a5a11d | 975 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) { |
2acf3d90 | 976 | hci_req_add_le_scan_disable(&req); |
a1536da2 | 977 | hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED); |
2acf3d90 AG |
978 | } |
979 | ||
81ad6fd9 JH |
980 | hci_req_add_le_create_conn(&req, conn); |
981 | ||
3c857757 | 982 | create_conn: |
81ad6fd9 | 983 | err = hci_req_run(&req, create_le_conn_complete); |
2acf3d90 AG |
984 | if (err) { |
985 | hci_conn_del(conn); | |
620ad521 | 986 | return ERR_PTR(err); |
2acf3d90 | 987 | } |
fcd89c09 | 988 | |
620ad521 | 989 | done: |
28a667c9 JP |
990 | /* If this is continuation of connect started by hci_connect_le_scan, |
991 | * it already called hci_conn_hold and calling it again would mess the | |
992 | * counter. | |
993 | */ | |
994 | if (!conn_unfinished) | |
995 | hci_conn_hold(conn); | |
996 | ||
f1e5d547 | 997 | return conn; |
d04aef4c | 998 | } |
fcd89c09 | 999 | |
f75113a2 JP |
1000 | static void hci_connect_le_scan_complete(struct hci_dev *hdev, u8 status, |
1001 | u16 opcode) | |
1002 | { | |
1003 | struct hci_conn *conn; | |
1004 | ||
1005 | if (!status) | |
1006 | return; | |
1007 | ||
1008 | BT_ERR("Failed to add device to auto conn whitelist: status 0x%2.2x", | |
1009 | status); | |
1010 | ||
1011 | hci_dev_lock(hdev); | |
1012 | ||
1013 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
1014 | if (conn) | |
1015 | hci_le_conn_failed(conn, status); | |
1016 | ||
1017 | hci_dev_unlock(hdev); | |
1018 | } | |
1019 | ||
1020 | static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type) | |
1021 | { | |
1022 | struct hci_conn *conn; | |
1023 | ||
9d4c1cc1 | 1024 | conn = hci_conn_hash_lookup_le(hdev, addr, type); |
f75113a2 JP |
1025 | if (!conn) |
1026 | return false; | |
1027 | ||
f75113a2 JP |
1028 | if (conn->state != BT_CONNECTED) |
1029 | return false; | |
1030 | ||
1031 | return true; | |
1032 | } | |
1033 | ||
1034 | /* This function requires the caller holds hdev->lock */ | |
1035 | static int hci_explicit_conn_params_set(struct hci_request *req, | |
1036 | bdaddr_t *addr, u8 addr_type) | |
1037 | { | |
1038 | struct hci_dev *hdev = req->hdev; | |
1039 | struct hci_conn_params *params; | |
1040 | ||
1041 | if (is_connected(hdev, addr, addr_type)) | |
1042 | return -EISCONN; | |
1043 | ||
5157b8a5 JP |
1044 | params = hci_conn_params_lookup(hdev, addr, addr_type); |
1045 | if (!params) { | |
1046 | params = hci_conn_params_add(hdev, addr, addr_type); | |
1047 | if (!params) | |
1048 | return -ENOMEM; | |
1049 | ||
1050 | /* If we created new params, mark them to be deleted in | |
1051 | * hci_connect_le_scan_cleanup. It's different case than | |
1052 | * existing disabled params, those will stay after cleanup. | |
1053 | */ | |
1054 | params->auto_connect = HCI_AUTO_CONN_EXPLICIT; | |
1055 | } | |
f75113a2 | 1056 | |
5157b8a5 | 1057 | /* We're trying to connect, so make sure params are at pend_le_conns */ |
49c50922 | 1058 | if (params->auto_connect == HCI_AUTO_CONN_DISABLED || |
5157b8a5 JP |
1059 | params->auto_connect == HCI_AUTO_CONN_REPORT || |
1060 | params->auto_connect == HCI_AUTO_CONN_EXPLICIT) { | |
f75113a2 JP |
1061 | list_del_init(¶ms->action); |
1062 | list_add(¶ms->action, &hdev->pend_le_conns); | |
1063 | } | |
1064 | ||
1065 | params->explicit_connect = true; | |
1066 | __hci_update_background_scan(req); | |
1067 | ||
1068 | BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type, | |
1069 | params->auto_connect); | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | /* This function requires the caller holds hdev->lock */ | |
1075 | struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst, | |
1076 | u8 dst_type, u8 sec_level, | |
1077 | u16 conn_timeout, u8 role) | |
1078 | { | |
1079 | struct hci_conn *conn; | |
1080 | struct hci_request req; | |
1081 | int err; | |
1082 | ||
1083 | /* Let's make sure that le is enabled.*/ | |
1084 | if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { | |
1085 | if (lmp_le_capable(hdev)) | |
1086 | return ERR_PTR(-ECONNREFUSED); | |
1087 | ||
1088 | return ERR_PTR(-EOPNOTSUPP); | |
1089 | } | |
1090 | ||
1091 | /* Some devices send ATT messages as soon as the physical link is | |
1092 | * established. To be able to handle these ATT messages, the user- | |
1093 | * space first establishes the connection and then starts the pairing | |
1094 | * process. | |
1095 | * | |
1096 | * So if a hci_conn object already exists for the following connection | |
1097 | * attempt, we simply update pending_sec_level and auth_type fields | |
1098 | * and return the object found. | |
1099 | */ | |
9d4c1cc1 | 1100 | conn = hci_conn_hash_lookup_le(hdev, dst, dst_type); |
f75113a2 JP |
1101 | if (conn) { |
1102 | if (conn->pending_sec_level < sec_level) | |
1103 | conn->pending_sec_level = sec_level; | |
1104 | goto done; | |
1105 | } | |
1106 | ||
1107 | BT_DBG("requesting refresh of dst_addr"); | |
1108 | ||
1109 | conn = hci_conn_add(hdev, LE_LINK, dst, role); | |
1110 | if (!conn) | |
1111 | return ERR_PTR(-ENOMEM); | |
1112 | ||
1113 | hci_req_init(&req, hdev); | |
1114 | ||
1115 | if (hci_explicit_conn_params_set(&req, dst, dst_type) < 0) | |
1116 | return ERR_PTR(-EBUSY); | |
1117 | ||
1118 | conn->state = BT_CONNECT; | |
1119 | set_bit(HCI_CONN_SCANNING, &conn->flags); | |
1120 | ||
1121 | err = hci_req_run(&req, hci_connect_le_scan_complete); | |
1122 | if (err && err != -ENODATA) { | |
1123 | hci_conn_del(conn); | |
1124 | return ERR_PTR(err); | |
1125 | } | |
1126 | ||
1127 | conn->dst_type = dst_type; | |
1128 | conn->sec_level = BT_SECURITY_LOW; | |
1129 | conn->pending_sec_level = sec_level; | |
1130 | conn->conn_timeout = conn_timeout; | |
1131 | ||
1132 | done: | |
1133 | hci_conn_hold(conn); | |
1134 | return conn; | |
1135 | } | |
1136 | ||
04a6c589 AG |
1137 | struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst, |
1138 | u8 sec_level, u8 auth_type) | |
1da177e4 LT |
1139 | { |
1140 | struct hci_conn *acl; | |
fcd89c09 | 1141 | |
d7a5a11d | 1142 | if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) { |
c411110e LR |
1143 | if (lmp_bredr_capable(hdev)) |
1144 | return ERR_PTR(-ECONNREFUSED); | |
1145 | ||
beb19e4c | 1146 | return ERR_PTR(-EOPNOTSUPP); |
c411110e | 1147 | } |
56f87901 | 1148 | |
70f23020 AE |
1149 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
1150 | if (!acl) { | |
a5c4e309 | 1151 | acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER); |
70f23020 | 1152 | if (!acl) |
48c7aba9 | 1153 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
1154 | } |
1155 | ||
1156 | hci_conn_hold(acl); | |
1157 | ||
09ab6f4c | 1158 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
1159 | acl->sec_level = BT_SECURITY_LOW; |
1160 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 1161 | acl->auth_type = auth_type; |
1aef8669 | 1162 | hci_acl_create_connection(acl); |
09ab6f4c | 1163 | } |
1da177e4 | 1164 | |
db474275 VCG |
1165 | return acl; |
1166 | } | |
1167 | ||
10c62ddc FD |
1168 | struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst, |
1169 | __u16 setting) | |
db474275 VCG |
1170 | { |
1171 | struct hci_conn *acl; | |
1172 | struct hci_conn *sco; | |
1173 | ||
e660ed6c | 1174 | acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
db474275 | 1175 | if (IS_ERR(acl)) |
5b7f9909 | 1176 | return acl; |
1da177e4 | 1177 | |
70f23020 AE |
1178 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
1179 | if (!sco) { | |
a5c4e309 | 1180 | sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER); |
70f23020 | 1181 | if (!sco) { |
76a68ba0 | 1182 | hci_conn_drop(acl); |
48c7aba9 | 1183 | return ERR_PTR(-ENOMEM); |
1da177e4 | 1184 | } |
5b7f9909 | 1185 | } |
1da177e4 | 1186 | |
5b7f9909 MH |
1187 | acl->link = sco; |
1188 | sco->link = acl; | |
1da177e4 | 1189 | |
5b7f9909 | 1190 | hci_conn_hold(sco); |
1da177e4 | 1191 | |
10c62ddc FD |
1192 | sco->setting = setting; |
1193 | ||
5b7f9909 | 1194 | if (acl->state == BT_CONNECTED && |
5974e4c4 | 1195 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
58a681ef | 1196 | set_bit(HCI_CONN_POWER_SAVE, &acl->flags); |
14b12d0b | 1197 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 1198 | |
51a8efd7 | 1199 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { |
e73439d8 | 1200 | /* defer SCO setup until mode change completed */ |
51a8efd7 | 1201 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); |
e73439d8 MH |
1202 | return sco; |
1203 | } | |
1204 | ||
1205 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 1206 | } |
5b7f9909 MH |
1207 | |
1208 | return sco; | |
1da177e4 | 1209 | } |
1da177e4 | 1210 | |
e7c29cb1 MH |
1211 | /* Check link security requirement */ |
1212 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
1213 | { | |
38b3fef1 | 1214 | BT_DBG("hcon %p", conn); |
e7c29cb1 | 1215 | |
40b552aa MH |
1216 | /* In Secure Connections Only mode, it is required that Secure |
1217 | * Connections is used and the link is encrypted with AES-CCM | |
1218 | * using a P-256 authenticated combination key. | |
1219 | */ | |
d7a5a11d | 1220 | if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) { |
40b552aa MH |
1221 | if (!hci_conn_sc_enabled(conn) || |
1222 | !test_bit(HCI_CONN_AES_CCM, &conn->flags) || | |
1223 | conn->key_type != HCI_LK_AUTH_COMBINATION_P256) | |
1224 | return 0; | |
1225 | } | |
1226 | ||
4dae2798 JH |
1227 | if (hci_conn_ssp_enabled(conn) && |
1228 | !test_bit(HCI_CONN_ENCRYPT, &conn->flags)) | |
e7c29cb1 MH |
1229 | return 0; |
1230 | ||
1231 | return 1; | |
1232 | } | |
e7c29cb1 | 1233 | |
1da177e4 | 1234 | /* Authenticate remote device */ |
0684e5f9 | 1235 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 | 1236 | { |
38b3fef1 | 1237 | BT_DBG("hcon %p", conn); |
1da177e4 | 1238 | |
765c2a96 JH |
1239 | if (conn->pending_sec_level > sec_level) |
1240 | sec_level = conn->pending_sec_level; | |
1241 | ||
96a31833 | 1242 | if (sec_level > conn->sec_level) |
765c2a96 | 1243 | conn->pending_sec_level = sec_level; |
4dae2798 | 1244 | else if (test_bit(HCI_CONN_AUTH, &conn->flags)) |
1da177e4 LT |
1245 | return 1; |
1246 | ||
65cf686e JH |
1247 | /* Make sure we preserve an existing MITM requirement*/ |
1248 | auth_type |= (conn->auth_type & 0x01); | |
1249 | ||
96a31833 MH |
1250 | conn->auth_type = auth_type; |
1251 | ||
51a8efd7 | 1252 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 1253 | struct hci_cp_auth_requested cp; |
b7d05bad | 1254 | |
aca3192c | 1255 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 1256 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
5974e4c4 | 1257 | sizeof(cp), &cp); |
09da1f34 JH |
1258 | |
1259 | /* If we're already encrypted set the REAUTH_PEND flag, | |
1260 | * otherwise set the ENCRYPT_PEND. | |
1261 | */ | |
4dae2798 | 1262 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) |
51a8efd7 | 1263 | set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); |
09da1f34 JH |
1264 | else |
1265 | set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); | |
1da177e4 | 1266 | } |
8c1b2355 | 1267 | |
1da177e4 LT |
1268 | return 0; |
1269 | } | |
1da177e4 | 1270 | |
13d39315 WR |
1271 | /* Encrypt the the link */ |
1272 | static void hci_conn_encrypt(struct hci_conn *conn) | |
1273 | { | |
38b3fef1 | 1274 | BT_DBG("hcon %p", conn); |
13d39315 | 1275 | |
51a8efd7 | 1276 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { |
13d39315 WR |
1277 | struct hci_cp_set_conn_encrypt cp; |
1278 | cp.handle = cpu_to_le16(conn->handle); | |
1279 | cp.encrypt = 0x01; | |
1280 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
5974e4c4 | 1281 | &cp); |
13d39315 WR |
1282 | } |
1283 | } | |
1284 | ||
8c1b2355 | 1285 | /* Enable security */ |
e7cafc45 JH |
1286 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type, |
1287 | bool initiator) | |
1da177e4 | 1288 | { |
38b3fef1 | 1289 | BT_DBG("hcon %p", conn); |
1da177e4 | 1290 | |
d8343f12 VCG |
1291 | if (conn->type == LE_LINK) |
1292 | return smp_conn_security(conn, sec_level); | |
1293 | ||
13d39315 | 1294 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
1295 | if (sec_level == BT_SECURITY_SDP) |
1296 | return 1; | |
1297 | ||
13d39315 WR |
1298 | /* For non 2.1 devices and low security level we don't need the link |
1299 | key. */ | |
aa64a8b5 | 1300 | if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) |
3fdca1e1 | 1301 | return 1; |
8c1b2355 | 1302 | |
13d39315 | 1303 | /* For other security levels we need the link key. */ |
4dae2798 | 1304 | if (!test_bit(HCI_CONN_AUTH, &conn->flags)) |
13d39315 WR |
1305 | goto auth; |
1306 | ||
7b5a9241 MH |
1307 | /* An authenticated FIPS approved combination key has sufficient |
1308 | * security for security level 4. */ | |
1309 | if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 && | |
1310 | sec_level == BT_SECURITY_FIPS) | |
1311 | goto encrypt; | |
1312 | ||
1313 | /* An authenticated combination key has sufficient security for | |
1314 | security level 3. */ | |
1315 | if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 || | |
1316 | conn->key_type == HCI_LK_AUTH_COMBINATION_P256) && | |
1317 | sec_level == BT_SECURITY_HIGH) | |
13d39315 WR |
1318 | goto encrypt; |
1319 | ||
1320 | /* An unauthenticated combination key has sufficient security for | |
1321 | security level 1 and 2. */ | |
66138ce8 MH |
1322 | if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 || |
1323 | conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) && | |
5974e4c4 | 1324 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW)) |
13d39315 WR |
1325 | goto encrypt; |
1326 | ||
1327 | /* A combination key has always sufficient security for the security | |
1328 | levels 1 or 2. High security level requires the combination key | |
1329 | is generated using maximum PIN code length (16). | |
1330 | For pre 2.1 units. */ | |
1331 | if (conn->key_type == HCI_LK_COMBINATION && | |
7b5a9241 MH |
1332 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW || |
1333 | conn->pin_length == 16)) | |
13d39315 WR |
1334 | goto encrypt; |
1335 | ||
1336 | auth: | |
51a8efd7 | 1337 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) |
1da177e4 LT |
1338 | return 0; |
1339 | ||
977f8fce JH |
1340 | if (initiator) |
1341 | set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); | |
1342 | ||
6fdf658c LAD |
1343 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
1344 | return 0; | |
13d39315 WR |
1345 | |
1346 | encrypt: | |
4dae2798 | 1347 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) |
13d39315 | 1348 | return 1; |
8c1b2355 | 1349 | |
13d39315 | 1350 | hci_conn_encrypt(conn); |
1da177e4 LT |
1351 | return 0; |
1352 | } | |
8c1b2355 | 1353 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 1354 | |
b3b1b061 WR |
1355 | /* Check secure link requirement */ |
1356 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
1357 | { | |
38b3fef1 | 1358 | BT_DBG("hcon %p", conn); |
b3b1b061 | 1359 | |
9cb2e030 MH |
1360 | /* Accept if non-secure or higher security level is required */ |
1361 | if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS) | |
1362 | return 1; | |
b3b1b061 | 1363 | |
9cb2e030 MH |
1364 | /* Accept if secure or higher security level is already present */ |
1365 | if (conn->sec_level == BT_SECURITY_HIGH || | |
1366 | conn->sec_level == BT_SECURITY_FIPS) | |
b3b1b061 WR |
1367 | return 1; |
1368 | ||
9cb2e030 MH |
1369 | /* Reject not secure link */ |
1370 | return 0; | |
b3b1b061 WR |
1371 | } |
1372 | EXPORT_SYMBOL(hci_conn_check_secure); | |
1373 | ||
1da177e4 | 1374 | /* Switch role */ |
8c1b2355 | 1375 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 | 1376 | { |
38b3fef1 | 1377 | BT_DBG("hcon %p", conn); |
1da177e4 | 1378 | |
40bef302 | 1379 | if (role == conn->role) |
1da177e4 LT |
1380 | return 1; |
1381 | ||
51a8efd7 | 1382 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { |
1da177e4 LT |
1383 | struct hci_cp_switch_role cp; |
1384 | bacpy(&cp.bdaddr, &conn->dst); | |
1385 | cp.role = role; | |
a9de9248 | 1386 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 1387 | } |
8c1b2355 | 1388 | |
1da177e4 LT |
1389 | return 0; |
1390 | } | |
1391 | EXPORT_SYMBOL(hci_conn_switch_role); | |
1392 | ||
04837f64 | 1393 | /* Enter active mode */ |
14b12d0b | 1394 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
1395 | { |
1396 | struct hci_dev *hdev = conn->hdev; | |
1397 | ||
38b3fef1 | 1398 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
04837f64 | 1399 | |
14b12d0b JG |
1400 | if (conn->mode != HCI_CM_SNIFF) |
1401 | goto timer; | |
1402 | ||
58a681ef | 1403 | if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) |
04837f64 MH |
1404 | goto timer; |
1405 | ||
51a8efd7 | 1406 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
04837f64 | 1407 | struct hci_cp_exit_sniff_mode cp; |
aca3192c | 1408 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 1409 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
1410 | } |
1411 | ||
1412 | timer: | |
1413 | if (hdev->idle_timeout > 0) | |
a74a84f6 JH |
1414 | queue_delayed_work(hdev->workqueue, &conn->idle_work, |
1415 | msecs_to_jiffies(hdev->idle_timeout)); | |
04837f64 MH |
1416 | } |
1417 | ||
1da177e4 LT |
1418 | /* Drop all connection on the device */ |
1419 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
1420 | { | |
1421 | struct hci_conn_hash *h = &hdev->conn_hash; | |
3c4e0df0 | 1422 | struct hci_conn *c, *n; |
1da177e4 LT |
1423 | |
1424 | BT_DBG("hdev %s", hdev->name); | |
1425 | ||
3c4e0df0 | 1426 | list_for_each_entry_safe(c, n, &h->list, list) { |
1da177e4 LT |
1427 | c->state = BT_CLOSED; |
1428 | ||
3a6d576b | 1429 | hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); |
1da177e4 LT |
1430 | hci_conn_del(c); |
1431 | } | |
1432 | } | |
1433 | ||
a9de9248 MH |
1434 | /* Check pending connect attempts */ |
1435 | void hci_conn_check_pending(struct hci_dev *hdev) | |
1436 | { | |
1437 | struct hci_conn *conn; | |
1438 | ||
1439 | BT_DBG("hdev %s", hdev->name); | |
1440 | ||
1441 | hci_dev_lock(hdev); | |
1442 | ||
1443 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
1444 | if (conn) | |
1aef8669 | 1445 | hci_acl_create_connection(conn); |
a9de9248 MH |
1446 | |
1447 | hci_dev_unlock(hdev); | |
1448 | } | |
1449 | ||
4dae2798 JH |
1450 | static u32 get_link_mode(struct hci_conn *conn) |
1451 | { | |
1452 | u32 link_mode = 0; | |
1453 | ||
40bef302 | 1454 | if (conn->role == HCI_ROLE_MASTER) |
4dae2798 JH |
1455 | link_mode |= HCI_LM_MASTER; |
1456 | ||
1457 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) | |
1458 | link_mode |= HCI_LM_ENCRYPT; | |
1459 | ||
1460 | if (test_bit(HCI_CONN_AUTH, &conn->flags)) | |
1461 | link_mode |= HCI_LM_AUTH; | |
1462 | ||
1463 | if (test_bit(HCI_CONN_SECURE, &conn->flags)) | |
1464 | link_mode |= HCI_LM_SECURE; | |
1465 | ||
1466 | if (test_bit(HCI_CONN_FIPS, &conn->flags)) | |
1467 | link_mode |= HCI_LM_FIPS; | |
1468 | ||
1469 | return link_mode; | |
1470 | } | |
1471 | ||
1da177e4 LT |
1472 | int hci_get_conn_list(void __user *arg) |
1473 | { | |
fc5fef61 | 1474 | struct hci_conn *c; |
1da177e4 LT |
1475 | struct hci_conn_list_req req, *cl; |
1476 | struct hci_conn_info *ci; | |
1477 | struct hci_dev *hdev; | |
1da177e4 LT |
1478 | int n = 0, size, err; |
1479 | ||
1480 | if (copy_from_user(&req, arg, sizeof(req))) | |
1481 | return -EFAULT; | |
1482 | ||
1483 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
1484 | return -EINVAL; | |
1485 | ||
1486 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
1487 | ||
70f23020 AE |
1488 | cl = kmalloc(size, GFP_KERNEL); |
1489 | if (!cl) | |
1da177e4 LT |
1490 | return -ENOMEM; |
1491 | ||
70f23020 AE |
1492 | hdev = hci_dev_get(req.dev_id); |
1493 | if (!hdev) { | |
1da177e4 LT |
1494 | kfree(cl); |
1495 | return -ENODEV; | |
1496 | } | |
1497 | ||
1498 | ci = cl->conn_info; | |
1499 | ||
09fd0de5 | 1500 | hci_dev_lock(hdev); |
8035ded4 | 1501 | list_for_each_entry(c, &hdev->conn_hash.list, list) { |
1da177e4 LT |
1502 | bacpy(&(ci + n)->bdaddr, &c->dst); |
1503 | (ci + n)->handle = c->handle; | |
1504 | (ci + n)->type = c->type; | |
1505 | (ci + n)->out = c->out; | |
1506 | (ci + n)->state = c->state; | |
4dae2798 | 1507 | (ci + n)->link_mode = get_link_mode(c); |
1da177e4 LT |
1508 | if (++n >= req.conn_num) |
1509 | break; | |
1510 | } | |
09fd0de5 | 1511 | hci_dev_unlock(hdev); |
1da177e4 LT |
1512 | |
1513 | cl->dev_id = hdev->id; | |
1514 | cl->conn_num = n; | |
1515 | size = sizeof(req) + n * sizeof(*ci); | |
1516 | ||
1517 | hci_dev_put(hdev); | |
1518 | ||
1519 | err = copy_to_user(arg, cl, size); | |
1520 | kfree(cl); | |
1521 | ||
1522 | return err ? -EFAULT : 0; | |
1523 | } | |
1524 | ||
1525 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
1526 | { | |
1527 | struct hci_conn_info_req req; | |
1528 | struct hci_conn_info ci; | |
1529 | struct hci_conn *conn; | |
1530 | char __user *ptr = arg + sizeof(req); | |
1531 | ||
1532 | if (copy_from_user(&req, arg, sizeof(req))) | |
1533 | return -EFAULT; | |
1534 | ||
09fd0de5 | 1535 | hci_dev_lock(hdev); |
1da177e4 LT |
1536 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); |
1537 | if (conn) { | |
1538 | bacpy(&ci.bdaddr, &conn->dst); | |
1539 | ci.handle = conn->handle; | |
1540 | ci.type = conn->type; | |
1541 | ci.out = conn->out; | |
1542 | ci.state = conn->state; | |
4dae2798 | 1543 | ci.link_mode = get_link_mode(conn); |
1da177e4 | 1544 | } |
09fd0de5 | 1545 | hci_dev_unlock(hdev); |
1da177e4 LT |
1546 | |
1547 | if (!conn) | |
1548 | return -ENOENT; | |
1549 | ||
1550 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
1551 | } | |
40be492f MH |
1552 | |
1553 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
1554 | { | |
1555 | struct hci_auth_info_req req; | |
1556 | struct hci_conn *conn; | |
1557 | ||
1558 | if (copy_from_user(&req, arg, sizeof(req))) | |
1559 | return -EFAULT; | |
1560 | ||
09fd0de5 | 1561 | hci_dev_lock(hdev); |
40be492f MH |
1562 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); |
1563 | if (conn) | |
1564 | req.type = conn->auth_type; | |
09fd0de5 | 1565 | hci_dev_unlock(hdev); |
40be492f MH |
1566 | |
1567 | if (!conn) | |
1568 | return -ENOENT; | |
1569 | ||
1570 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
1571 | } | |
73d80deb LAD |
1572 | |
1573 | struct hci_chan *hci_chan_create(struct hci_conn *conn) | |
1574 | { | |
1575 | struct hci_dev *hdev = conn->hdev; | |
1576 | struct hci_chan *chan; | |
1577 | ||
38b3fef1 | 1578 | BT_DBG("%s hcon %p", hdev->name, conn); |
73d80deb | 1579 | |
f94b665d JH |
1580 | if (test_bit(HCI_CONN_DROP, &conn->flags)) { |
1581 | BT_DBG("Refusing to create new hci_chan"); | |
1582 | return NULL; | |
1583 | } | |
1584 | ||
27f70f3e | 1585 | chan = kzalloc(sizeof(*chan), GFP_KERNEL); |
73d80deb LAD |
1586 | if (!chan) |
1587 | return NULL; | |
1588 | ||
6c388d32 | 1589 | chan->conn = hci_conn_get(conn); |
73d80deb | 1590 | skb_queue_head_init(&chan->data_q); |
168df8e5 | 1591 | chan->state = BT_CONNECTED; |
73d80deb | 1592 | |
8192edef | 1593 | list_add_rcu(&chan->list, &conn->chan_list); |
73d80deb LAD |
1594 | |
1595 | return chan; | |
1596 | } | |
1597 | ||
9472007c | 1598 | void hci_chan_del(struct hci_chan *chan) |
73d80deb LAD |
1599 | { |
1600 | struct hci_conn *conn = chan->conn; | |
1601 | struct hci_dev *hdev = conn->hdev; | |
1602 | ||
38b3fef1 | 1603 | BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan); |
73d80deb | 1604 | |
8192edef GP |
1605 | list_del_rcu(&chan->list); |
1606 | ||
1607 | synchronize_rcu(); | |
73d80deb | 1608 | |
bcbb655a | 1609 | /* Prevent new hci_chan's to be created for this hci_conn */ |
f94b665d | 1610 | set_bit(HCI_CONN_DROP, &conn->flags); |
b3ff670a | 1611 | |
6c388d32 | 1612 | hci_conn_put(conn); |
e9b02748 | 1613 | |
73d80deb LAD |
1614 | skb_queue_purge(&chan->data_q); |
1615 | kfree(chan); | |
73d80deb LAD |
1616 | } |
1617 | ||
2c33c06a | 1618 | void hci_chan_list_flush(struct hci_conn *conn) |
73d80deb | 1619 | { |
2a5a5ec6 | 1620 | struct hci_chan *chan, *n; |
73d80deb | 1621 | |
38b3fef1 | 1622 | BT_DBG("hcon %p", conn); |
73d80deb | 1623 | |
2a5a5ec6 | 1624 | list_for_each_entry_safe(chan, n, &conn->chan_list, list) |
73d80deb LAD |
1625 | hci_chan_del(chan); |
1626 | } | |
42c4e53e AE |
1627 | |
1628 | static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon, | |
1629 | __u16 handle) | |
1630 | { | |
1631 | struct hci_chan *hchan; | |
1632 | ||
1633 | list_for_each_entry(hchan, &hcon->chan_list, list) { | |
1634 | if (hchan->handle == handle) | |
1635 | return hchan; | |
1636 | } | |
1637 | ||
1638 | return NULL; | |
1639 | } | |
1640 | ||
1641 | struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle) | |
1642 | { | |
1643 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1644 | struct hci_conn *hcon; | |
1645 | struct hci_chan *hchan = NULL; | |
1646 | ||
1647 | rcu_read_lock(); | |
1648 | ||
1649 | list_for_each_entry_rcu(hcon, &h->list, list) { | |
1650 | hchan = __hci_chan_lookup_handle(hcon, handle); | |
1651 | if (hchan) | |
1652 | break; | |
1653 | } | |
1654 | ||
1655 | rcu_read_unlock(); | |
1656 | ||
1657 | return hchan; | |
1658 | } |