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8e87d142 | 1 | /* |
1da177e4 | 2 | BlueZ - Bluetooth protocol stack for Linux |
2d0a0346 | 3 | Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved. |
1da177e4 LT |
4 | |
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth HCI connection handling. */ | |
26 | ||
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 | ||
f75113a2 JP |
62 | /* This function requires the caller holds hdev->lock */ |
63 | static void hci_connect_le_scan_cleanup(struct hci_conn *conn) | |
64 | { | |
65 | struct hci_conn_params *params; | |
b5c2b621 | 66 | struct hci_dev *hdev = conn->hdev; |
f75113a2 JP |
67 | struct smp_irk *irk; |
68 | bdaddr_t *bdaddr; | |
69 | u8 bdaddr_type; | |
70 | ||
71 | bdaddr = &conn->dst; | |
72 | bdaddr_type = conn->dst_type; | |
73 | ||
74 | /* Check if we need to convert to identity address */ | |
b5c2b621 | 75 | irk = hci_get_irk(hdev, bdaddr, bdaddr_type); |
f75113a2 JP |
76 | if (irk) { |
77 | bdaddr = &irk->bdaddr; | |
78 | bdaddr_type = irk->addr_type; | |
79 | } | |
80 | ||
17bc08f0 JH |
81 | params = hci_pend_le_action_lookup(&hdev->pend_le_conns, bdaddr, |
82 | bdaddr_type); | |
83 | if (!params || !params->explicit_connect) | |
f75113a2 JP |
84 | return; |
85 | ||
86 | /* The connection attempt was doing scan for new RPA, and is | |
87 | * in scan phase. If params are not associated with any other | |
88 | * autoconnect action, remove them completely. If they are, just unmark | |
89 | * them as waiting for connection, by clearing explicit_connect field. | |
90 | */ | |
9ad3e6ff JH |
91 | params->explicit_connect = false; |
92 | ||
93 | list_del_init(¶ms->action); | |
94 | ||
95 | switch (params->auto_connect) { | |
96 | case HCI_AUTO_CONN_EXPLICIT: | |
b5c2b621 | 97 | hci_conn_params_del(hdev, bdaddr, bdaddr_type); |
9ad3e6ff JH |
98 | /* return instead of break to avoid duplicate scan update */ |
99 | return; | |
100 | case HCI_AUTO_CONN_DIRECT: | |
101 | case HCI_AUTO_CONN_ALWAYS: | |
b5c2b621 | 102 | list_add(¶ms->action, &hdev->pend_le_conns); |
9ad3e6ff JH |
103 | break; |
104 | case HCI_AUTO_CONN_REPORT: | |
b5c2b621 | 105 | list_add(¶ms->action, &hdev->pend_le_reports); |
9ad3e6ff JH |
106 | break; |
107 | default: | |
108 | break; | |
168b8a25 | 109 | } |
9ad3e6ff | 110 | |
b5c2b621 | 111 | hci_update_background_scan(hdev); |
f75113a2 JP |
112 | } |
113 | ||
b958f9a3 JH |
114 | static void hci_conn_cleanup(struct hci_conn *conn) |
115 | { | |
116 | struct hci_dev *hdev = conn->hdev; | |
117 | ||
118 | if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags)) | |
119 | hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type); | |
120 | ||
121 | hci_chan_list_flush(conn); | |
122 | ||
123 | hci_conn_hash_del(hdev, conn); | |
124 | ||
125 | if (hdev->notify) | |
126 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); | |
127 | ||
128 | hci_conn_del_sysfs(conn); | |
129 | ||
130 | debugfs_remove_recursive(conn->debugfs); | |
131 | ||
132 | hci_dev_put(hdev); | |
133 | ||
134 | hci_conn_put(conn); | |
135 | } | |
136 | ||
8ce783dc | 137 | static void le_scan_cleanup(struct work_struct *work) |
f75113a2 | 138 | { |
8ce783dc JH |
139 | struct hci_conn *conn = container_of(work, struct hci_conn, |
140 | le_scan_cleanup); | |
141 | struct hci_dev *hdev = conn->hdev; | |
142 | struct hci_conn *c = NULL; | |
143 | ||
144 | BT_DBG("%s hcon %p", hdev->name, conn); | |
145 | ||
146 | hci_dev_lock(hdev); | |
147 | ||
148 | /* Check that the hci_conn is still around */ | |
149 | rcu_read_lock(); | |
150 | list_for_each_entry_rcu(c, &hdev->conn_hash.list, list) { | |
151 | if (c == conn) | |
152 | break; | |
153 | } | |
154 | rcu_read_unlock(); | |
155 | ||
156 | if (c == conn) { | |
157 | hci_connect_le_scan_cleanup(conn); | |
158 | hci_conn_cleanup(conn); | |
159 | } | |
160 | ||
161 | hci_dev_unlock(hdev); | |
162 | hci_dev_put(hdev); | |
163 | hci_conn_put(conn); | |
164 | } | |
f75113a2 | 165 | |
8ce783dc JH |
166 | static void hci_connect_le_scan_remove(struct hci_conn *conn) |
167 | { | |
168 | BT_DBG("%s hcon %p", conn->hdev->name, conn); | |
169 | ||
170 | /* We can't call hci_conn_del/hci_conn_cleanup here since that | |
171 | * could deadlock with another hci_conn_del() call that's holding | |
172 | * hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work). | |
173 | * Instead, grab temporary extra references to the hci_dev and | |
174 | * hci_conn and perform the necessary cleanup in a separate work | |
175 | * callback. | |
b958f9a3 | 176 | */ |
8ce783dc JH |
177 | |
178 | hci_dev_hold(conn->hdev); | |
179 | hci_conn_get(conn); | |
180 | ||
0ebc1818 JH |
181 | /* Even though we hold a reference to the hdev, many other |
182 | * things might get cleaned up meanwhile, including the hdev's | |
183 | * own workqueue, so we can't use that for scheduling. | |
184 | */ | |
8ce783dc | 185 | schedule_work(&conn->le_scan_cleanup); |
f75113a2 JP |
186 | } |
187 | ||
1aef8669 | 188 | static void hci_acl_create_connection(struct hci_conn *conn) |
1da177e4 LT |
189 | { |
190 | struct hci_dev *hdev = conn->hdev; | |
191 | struct inquiry_entry *ie; | |
192 | struct hci_cp_create_conn cp; | |
193 | ||
42d2d87c | 194 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
195 | |
196 | conn->state = BT_CONNECT; | |
a0c808b3 | 197 | conn->out = true; |
40bef302 | 198 | conn->role = HCI_ROLE_MASTER; |
1da177e4 | 199 | |
4c67bc74 MH |
200 | conn->attempt++; |
201 | ||
e4e8e37c MH |
202 | conn->link_policy = hdev->link_policy; |
203 | ||
1da177e4 LT |
204 | memset(&cp, 0, sizeof(cp)); |
205 | bacpy(&cp.bdaddr, &conn->dst); | |
206 | cp.pscan_rep_mode = 0x02; | |
207 | ||
70f23020 AE |
208 | ie = hci_inquiry_cache_lookup(hdev, &conn->dst); |
209 | if (ie) { | |
41a96212 MH |
210 | if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { |
211 | cp.pscan_rep_mode = ie->data.pscan_rep_mode; | |
212 | cp.pscan_mode = ie->data.pscan_mode; | |
213 | cp.clock_offset = ie->data.clock_offset | | |
dcf4adbf | 214 | cpu_to_le16(0x8000); |
41a96212 MH |
215 | } |
216 | ||
1da177e4 | 217 | memcpy(conn->dev_class, ie->data.dev_class, 3); |
58a681ef JH |
218 | if (ie->data.ssp_mode > 0) |
219 | set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); | |
1da177e4 LT |
220 | } |
221 | ||
a8746417 | 222 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 223 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) |
b6a0dc82 | 224 | cp.role_switch = 0x01; |
1da177e4 | 225 | else |
b6a0dc82 | 226 | cp.role_switch = 0x00; |
4c67bc74 | 227 | |
a9de9248 | 228 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); |
1da177e4 LT |
229 | } |
230 | ||
e3b679d5 | 231 | int hci_disconnect(struct hci_conn *conn, __u8 reason) |
1da177e4 | 232 | { |
38b3fef1 | 233 | BT_DBG("hcon %p", conn); |
1da177e4 | 234 | |
839035a7 JH |
235 | /* When we are master of an established connection and it enters |
236 | * the disconnect timeout, then go ahead and try to read the | |
237 | * current clock offset. Processing of the result is done | |
238 | * within the event handling and hci_clock_offset_evt function. | |
239 | */ | |
88d07feb JH |
240 | if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER && |
241 | (conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) { | |
839035a7 | 242 | struct hci_dev *hdev = conn->hdev; |
4f639ede | 243 | struct hci_cp_read_clock_offset clkoff_cp; |
839035a7 | 244 | |
4f639ede FF |
245 | clkoff_cp.handle = cpu_to_le16(conn->handle); |
246 | hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp), | |
247 | &clkoff_cp); | |
839035a7 JH |
248 | } |
249 | ||
88d07feb | 250 | return hci_abort_conn(conn, reason); |
1da177e4 LT |
251 | } |
252 | ||
57f5d0d1 | 253 | static void hci_add_sco(struct hci_conn *conn, __u16 handle) |
1da177e4 LT |
254 | { |
255 | struct hci_dev *hdev = conn->hdev; | |
256 | struct hci_cp_add_sco cp; | |
257 | ||
38b3fef1 | 258 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
259 | |
260 | conn->state = BT_CONNECT; | |
a0c808b3 | 261 | conn->out = true; |
1da177e4 | 262 | |
efc7688b MH |
263 | conn->attempt++; |
264 | ||
aca3192c | 265 | cp.handle = cpu_to_le16(handle); |
a8746417 | 266 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 267 | |
a9de9248 | 268 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); |
1da177e4 LT |
269 | } |
270 | ||
2dea632f | 271 | bool hci_setup_sync(struct hci_conn *conn, __u16 handle) |
b6a0dc82 MH |
272 | { |
273 | struct hci_dev *hdev = conn->hdev; | |
274 | struct hci_cp_setup_sync_conn cp; | |
2dea632f | 275 | const struct sco_param *param; |
b6a0dc82 | 276 | |
38b3fef1 | 277 | BT_DBG("hcon %p", conn); |
b6a0dc82 MH |
278 | |
279 | conn->state = BT_CONNECT; | |
a0c808b3 | 280 | conn->out = true; |
b6a0dc82 | 281 | |
efc7688b MH |
282 | conn->attempt++; |
283 | ||
b6a0dc82 | 284 | cp.handle = cpu_to_le16(handle); |
b6a0dc82 | 285 | |
dcf4adbf JP |
286 | cp.tx_bandwidth = cpu_to_le32(0x00001f40); |
287 | cp.rx_bandwidth = cpu_to_le32(0x00001f40); | |
10c62ddc FD |
288 | cp.voice_setting = cpu_to_le16(conn->setting); |
289 | ||
290 | switch (conn->setting & SCO_AIRMODE_MASK) { | |
291 | case SCO_AIRMODE_TRANSP: | |
565766b0 | 292 | if (conn->attempt > ARRAY_SIZE(esco_param_msbc)) |
2dea632f | 293 | return false; |
565766b0 | 294 | param = &esco_param_msbc[conn->attempt - 1]; |
10c62ddc FD |
295 | break; |
296 | case SCO_AIRMODE_CVSD: | |
48e68ff5 BT |
297 | if (lmp_esco_capable(conn->link)) { |
298 | if (conn->attempt > ARRAY_SIZE(esco_param_cvsd)) | |
299 | return false; | |
48e68ff5 BT |
300 | param = &esco_param_cvsd[conn->attempt - 1]; |
301 | } else { | |
302 | if (conn->attempt > ARRAY_SIZE(sco_param_cvsd)) | |
303 | return false; | |
48e68ff5 BT |
304 | param = &sco_param_cvsd[conn->attempt - 1]; |
305 | } | |
10c62ddc | 306 | break; |
2dea632f FD |
307 | default: |
308 | return false; | |
10c62ddc | 309 | } |
b6a0dc82 | 310 | |
c7da5797 | 311 | cp.retrans_effort = param->retrans_effort; |
2dea632f FD |
312 | cp.pkt_type = __cpu_to_le16(param->pkt_type); |
313 | cp.max_latency = __cpu_to_le16(param->max_latency); | |
314 | ||
315 | if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0) | |
316 | return false; | |
317 | ||
318 | return true; | |
b6a0dc82 MH |
319 | } |
320 | ||
7d6ca693 JH |
321 | u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency, |
322 | u16 to_multiplier) | |
2ce603eb | 323 | { |
2ce603eb | 324 | struct hci_dev *hdev = conn->hdev; |
f044eb05 MH |
325 | struct hci_conn_params *params; |
326 | struct hci_cp_le_conn_update cp; | |
2ce603eb | 327 | |
f044eb05 | 328 | hci_dev_lock(hdev); |
2ce603eb | 329 | |
f044eb05 MH |
330 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); |
331 | if (params) { | |
332 | params->conn_min_interval = min; | |
333 | params->conn_max_interval = max; | |
334 | params->conn_latency = latency; | |
335 | params->supervision_timeout = to_multiplier; | |
336 | } | |
337 | ||
338 | hci_dev_unlock(hdev); | |
339 | ||
340 | memset(&cp, 0, sizeof(cp)); | |
2ce603eb CT |
341 | cp.handle = cpu_to_le16(conn->handle); |
342 | cp.conn_interval_min = cpu_to_le16(min); | |
343 | cp.conn_interval_max = cpu_to_le16(max); | |
344 | cp.conn_latency = cpu_to_le16(latency); | |
345 | cp.supervision_timeout = cpu_to_le16(to_multiplier); | |
dcf4adbf JP |
346 | cp.min_ce_len = cpu_to_le16(0x0000); |
347 | cp.max_ce_len = cpu_to_le16(0x0000); | |
2ce603eb CT |
348 | |
349 | hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); | |
7d6ca693 JH |
350 | |
351 | if (params) | |
352 | return 0x01; | |
353 | ||
354 | return 0x00; | |
2ce603eb | 355 | } |
2ce603eb | 356 | |
fe39c7b2 | 357 | void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand, |
8b76ce34 | 358 | __u8 ltk[16], __u8 key_size) |
a7a595f6 VCG |
359 | { |
360 | struct hci_dev *hdev = conn->hdev; | |
361 | struct hci_cp_le_start_enc cp; | |
362 | ||
38b3fef1 | 363 | BT_DBG("hcon %p", conn); |
a7a595f6 VCG |
364 | |
365 | memset(&cp, 0, sizeof(cp)); | |
366 | ||
367 | cp.handle = cpu_to_le16(conn->handle); | |
fe39c7b2 | 368 | cp.rand = rand; |
a7a595f6 | 369 | cp.ediv = ediv; |
8b76ce34 | 370 | memcpy(cp.ltk, ltk, key_size); |
a7a595f6 VCG |
371 | |
372 | hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); | |
373 | } | |
a7a595f6 | 374 | |
e73439d8 MH |
375 | /* Device _must_ be locked */ |
376 | void hci_sco_setup(struct hci_conn *conn, __u8 status) | |
377 | { | |
378 | struct hci_conn *sco = conn->link; | |
379 | ||
e73439d8 MH |
380 | if (!sco) |
381 | return; | |
382 | ||
38b3fef1 AE |
383 | BT_DBG("hcon %p", conn); |
384 | ||
e73439d8 MH |
385 | if (!status) { |
386 | if (lmp_esco_capable(conn->hdev)) | |
387 | hci_setup_sync(sco, conn->handle); | |
388 | else | |
389 | hci_add_sco(sco, conn->handle); | |
390 | } else { | |
539c496d | 391 | hci_connect_cfm(sco, status); |
e73439d8 MH |
392 | hci_conn_del(sco); |
393 | } | |
394 | } | |
395 | ||
19c40e3b | 396 | static void hci_conn_timeout(struct work_struct *work) |
1da177e4 | 397 | { |
19c40e3b | 398 | struct hci_conn *conn = container_of(work, struct hci_conn, |
5974e4c4 | 399 | disc_work.work); |
1d56dc4f | 400 | int refcnt = atomic_read(&conn->refcnt); |
1da177e4 | 401 | |
38b3fef1 | 402 | BT_DBG("hcon %p state %s", conn, state_to_string(conn->state)); |
1da177e4 | 403 | |
1d56dc4f LR |
404 | WARN_ON(refcnt < 0); |
405 | ||
406 | /* FIXME: It was observed that in pairing failed scenario, refcnt | |
407 | * drops below 0. Probably this is because l2cap_conn_del calls | |
408 | * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is | |
409 | * dropped. After that loop hci_chan_del is called which also drops | |
410 | * conn. For now make sure that ACL is alive if refcnt is higher then 0, | |
411 | * otherwise drop it. | |
412 | */ | |
413 | if (refcnt > 0) | |
1da177e4 LT |
414 | return; |
415 | ||
89e0ccc8 JH |
416 | /* LE connections in scanning state need special handling */ |
417 | if (conn->state == BT_CONNECT && conn->type == LE_LINK && | |
418 | test_bit(HCI_CONN_SCANNING, &conn->flags)) { | |
419 | hci_connect_le_scan_remove(conn); | |
420 | return; | |
6ac59344 | 421 | } |
89e0ccc8 JH |
422 | |
423 | hci_abort_conn(conn, hci_proto_disconn_ind(conn)); | |
1da177e4 LT |
424 | } |
425 | ||
416dc94b | 426 | /* Enter sniff mode */ |
a74a84f6 | 427 | static void hci_conn_idle(struct work_struct *work) |
416dc94b | 428 | { |
a74a84f6 JH |
429 | struct hci_conn *conn = container_of(work, struct hci_conn, |
430 | idle_work.work); | |
416dc94b GP |
431 | struct hci_dev *hdev = conn->hdev; |
432 | ||
38b3fef1 | 433 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
416dc94b | 434 | |
416dc94b GP |
435 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) |
436 | return; | |
437 | ||
438 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
439 | return; | |
440 | ||
441 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
442 | struct hci_cp_sniff_subrate cp; | |
443 | cp.handle = cpu_to_le16(conn->handle); | |
dcf4adbf JP |
444 | cp.max_latency = cpu_to_le16(0); |
445 | cp.min_remote_timeout = cpu_to_le16(0); | |
446 | cp.min_local_timeout = cpu_to_le16(0); | |
416dc94b GP |
447 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); |
448 | } | |
449 | ||
51a8efd7 | 450 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
416dc94b GP |
451 | struct hci_cp_sniff_mode cp; |
452 | cp.handle = cpu_to_le16(conn->handle); | |
453 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
454 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
dcf4adbf JP |
455 | cp.attempt = cpu_to_le16(4); |
456 | cp.timeout = cpu_to_le16(1); | |
416dc94b GP |
457 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); |
458 | } | |
459 | } | |
460 | ||
7bc18d9d | 461 | static void hci_conn_auto_accept(struct work_struct *work) |
9f61656a | 462 | { |
7bc18d9d JH |
463 | struct hci_conn *conn = container_of(work, struct hci_conn, |
464 | auto_accept_work.work); | |
9f61656a | 465 | |
7bc18d9d | 466 | hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), |
5974e4c4 | 467 | &conn->dst); |
9f61656a JH |
468 | } |
469 | ||
9489eca4 JH |
470 | static void le_conn_timeout(struct work_struct *work) |
471 | { | |
472 | struct hci_conn *conn = container_of(work, struct hci_conn, | |
473 | le_conn_timeout.work); | |
3c857757 | 474 | struct hci_dev *hdev = conn->hdev; |
9489eca4 JH |
475 | |
476 | BT_DBG(""); | |
477 | ||
3c857757 JH |
478 | /* We could end up here due to having done directed advertising, |
479 | * so clean up the state if necessary. This should however only | |
480 | * happen with broken hardware or if low duty cycle was used | |
481 | * (which doesn't have a timeout of its own). | |
482 | */ | |
0b1db38c | 483 | if (conn->role == HCI_ROLE_SLAVE) { |
3c857757 JH |
484 | u8 enable = 0x00; |
485 | hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), | |
486 | &enable); | |
487 | hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT); | |
488 | return; | |
489 | } | |
490 | ||
89e0ccc8 | 491 | hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM); |
9489eca4 JH |
492 | } |
493 | ||
a5c4e309 JH |
494 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst, |
495 | u8 role) | |
1da177e4 LT |
496 | { |
497 | struct hci_conn *conn; | |
498 | ||
6ed93dc6 | 499 | BT_DBG("%s dst %pMR", hdev->name, dst); |
1da177e4 | 500 | |
27f70f3e | 501 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
04837f64 | 502 | if (!conn) |
1da177e4 | 503 | return NULL; |
1da177e4 LT |
504 | |
505 | bacpy(&conn->dst, dst); | |
662e8820 | 506 | bacpy(&conn->src, &hdev->bdaddr); |
a8746417 MH |
507 | conn->hdev = hdev; |
508 | conn->type = type; | |
a5c4e309 | 509 | conn->role = role; |
a8746417 MH |
510 | conn->mode = HCI_CM_ACTIVE; |
511 | conn->state = BT_OPEN; | |
93f19c9f | 512 | conn->auth_type = HCI_AT_GENERAL_BONDING; |
17fa4b9d | 513 | conn->io_capability = hdev->io_capability; |
a9583556 | 514 | conn->remote_auth = 0xff; |
13d39315 | 515 | conn->key_type = 0xff; |
ebf86aa3 | 516 | conn->rssi = HCI_RSSI_INVALID; |
5a134fae | 517 | conn->tx_power = HCI_TX_POWER_INVALID; |
d0455ed9 | 518 | conn->max_tx_power = HCI_TX_POWER_INVALID; |
1da177e4 | 519 | |
58a681ef | 520 | set_bit(HCI_CONN_POWER_SAVE, &conn->flags); |
052b30b0 | 521 | conn->disc_timeout = HCI_DISCONN_TIMEOUT; |
04837f64 | 522 | |
a5c4e309 JH |
523 | if (conn->role == HCI_ROLE_MASTER) |
524 | conn->out = true; | |
525 | ||
a8746417 MH |
526 | switch (type) { |
527 | case ACL_LINK: | |
528 | conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; | |
529 | break; | |
9c84d1da JH |
530 | case LE_LINK: |
531 | /* conn->src should reflect the local identity address */ | |
532 | hci_copy_identity_address(hdev, &conn->src, &conn->src_type); | |
533 | break; | |
a8746417 MH |
534 | case SCO_LINK: |
535 | if (lmp_esco_capable(hdev)) | |
efc7688b MH |
536 | conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | |
537 | (hdev->esco_type & EDR_ESCO_MASK); | |
a8746417 MH |
538 | else |
539 | conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; | |
540 | break; | |
541 | case ESCO_LINK: | |
efc7688b | 542 | conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; |
a8746417 MH |
543 | break; |
544 | } | |
545 | ||
1da177e4 | 546 | skb_queue_head_init(&conn->data_q); |
04837f64 | 547 | |
70c1f20b | 548 | INIT_LIST_HEAD(&conn->chan_list); |
73d80deb | 549 | |
19c40e3b | 550 | INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout); |
7bc18d9d | 551 | INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept); |
a74a84f6 | 552 | INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle); |
9489eca4 | 553 | INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout); |
8ce783dc | 554 | INIT_WORK(&conn->le_scan_cleanup, le_scan_cleanup); |
1da177e4 LT |
555 | |
556 | atomic_set(&conn->refcnt, 0); | |
557 | ||
558 | hci_dev_hold(hdev); | |
559 | ||
1da177e4 | 560 | hci_conn_hash_add(hdev, conn); |
3c54711c | 561 | if (hdev->notify) |
1da177e4 LT |
562 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); |
563 | ||
a67e899c MH |
564 | hci_conn_init_sysfs(conn); |
565 | ||
1da177e4 LT |
566 | return conn; |
567 | } | |
568 | ||
569 | int hci_conn_del(struct hci_conn *conn) | |
570 | { | |
571 | struct hci_dev *hdev = conn->hdev; | |
572 | ||
38b3fef1 | 573 | BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle); |
1da177e4 | 574 | |
19c40e3b | 575 | cancel_delayed_work_sync(&conn->disc_work); |
7bc18d9d | 576 | cancel_delayed_work_sync(&conn->auto_accept_work); |
a74a84f6 | 577 | cancel_delayed_work_sync(&conn->idle_work); |
9f61656a | 578 | |
5b7f9909 | 579 | if (conn->type == ACL_LINK) { |
1da177e4 LT |
580 | struct hci_conn *sco = conn->link; |
581 | if (sco) | |
582 | sco->link = NULL; | |
583 | ||
584 | /* Unacked frames */ | |
585 | hdev->acl_cnt += conn->sent; | |
6ed58ec5 | 586 | } else if (conn->type == LE_LINK) { |
980ffc0a | 587 | cancel_delayed_work(&conn->le_conn_timeout); |
9489eca4 | 588 | |
6ed58ec5 VT |
589 | if (hdev->le_pkts) |
590 | hdev->le_cnt += conn->sent; | |
591 | else | |
592 | hdev->acl_cnt += conn->sent; | |
5b7f9909 MH |
593 | } else { |
594 | struct hci_conn *acl = conn->link; | |
595 | if (acl) { | |
596 | acl->link = NULL; | |
76a68ba0 | 597 | hci_conn_drop(acl); |
5b7f9909 | 598 | } |
1da177e4 LT |
599 | } |
600 | ||
9740e49d AE |
601 | if (conn->amp_mgr) |
602 | amp_mgr_put(conn->amp_mgr); | |
603 | ||
1da177e4 | 604 | skb_queue_purge(&conn->data_q); |
1da177e4 | 605 | |
b958f9a3 JH |
606 | /* Remove the connection from the list and cleanup its remaining |
607 | * state. This is a separate function since for some cases like | |
608 | * BT_CONNECT_SCAN we *only* want the cleanup part without the | |
609 | * rest of hci_conn_del. | |
610 | */ | |
611 | hci_conn_cleanup(conn); | |
163f4dab | 612 | |
1da177e4 LT |
613 | return 0; |
614 | } | |
615 | ||
616 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
617 | { | |
618 | int use_src = bacmp(src, BDADDR_ANY); | |
8035ded4 | 619 | struct hci_dev *hdev = NULL, *d; |
1da177e4 | 620 | |
6ed93dc6 | 621 | BT_DBG("%pMR -> %pMR", src, dst); |
1da177e4 | 622 | |
f20d09d5 | 623 | read_lock(&hci_dev_list_lock); |
1da177e4 | 624 | |
8035ded4 | 625 | list_for_each_entry(d, &hci_dev_list, list) { |
8fc9ced3 | 626 | if (!test_bit(HCI_UP, &d->flags) || |
d7a5a11d | 627 | hci_dev_test_flag(d, HCI_USER_CHANNEL) || |
d300fa9b | 628 | d->dev_type != HCI_BREDR) |
1da177e4 LT |
629 | continue; |
630 | ||
8e87d142 | 631 | /* Simple routing: |
1da177e4 LT |
632 | * No source address - find interface with bdaddr != dst |
633 | * Source address - find interface with bdaddr == src | |
634 | */ | |
635 | ||
636 | if (use_src) { | |
637 | if (!bacmp(&d->bdaddr, src)) { | |
638 | hdev = d; break; | |
639 | } | |
640 | } else { | |
641 | if (bacmp(&d->bdaddr, dst)) { | |
642 | hdev = d; break; | |
643 | } | |
644 | } | |
645 | } | |
646 | ||
647 | if (hdev) | |
648 | hdev = hci_dev_hold(hdev); | |
649 | ||
f20d09d5 | 650 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
651 | return hdev; |
652 | } | |
653 | EXPORT_SYMBOL(hci_get_route); | |
654 | ||
9bb3c01f | 655 | /* This function requires the caller holds hdev->lock */ |
06c053fb | 656 | void hci_le_conn_failed(struct hci_conn *conn, u8 status) |
9bb3c01f AG |
657 | { |
658 | struct hci_dev *hdev = conn->hdev; | |
f161dd41 JH |
659 | struct hci_conn_params *params; |
660 | ||
661 | params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst, | |
662 | conn->dst_type); | |
663 | if (params && params->conn) { | |
664 | hci_conn_drop(params->conn); | |
f8aaf9b6 | 665 | hci_conn_put(params->conn); |
f161dd41 JH |
666 | params->conn = NULL; |
667 | } | |
9bb3c01f AG |
668 | |
669 | conn->state = BT_CLOSED; | |
670 | ||
671 | mgmt_connect_failed(hdev, &conn->dst, conn->type, conn->dst_type, | |
672 | status); | |
673 | ||
539c496d | 674 | hci_connect_cfm(conn, status); |
9bb3c01f AG |
675 | |
676 | hci_conn_del(conn); | |
a4790dbd AG |
677 | |
678 | /* Since we may have temporarily stopped the background scanning in | |
679 | * favor of connection establishment, we should restart it. | |
680 | */ | |
681 | hci_update_background_scan(hdev); | |
3c857757 JH |
682 | |
683 | /* Re-enable advertising in case this was a failed connection | |
684 | * attempt as a peripheral. | |
685 | */ | |
686 | mgmt_reenable_advertising(hdev); | |
9bb3c01f AG |
687 | } |
688 | ||
1904a853 | 689 | static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode) |
1d399ae5 AG |
690 | { |
691 | struct hci_conn *conn; | |
692 | ||
28a667c9 JP |
693 | hci_dev_lock(hdev); |
694 | ||
695 | conn = hci_lookup_le_connect(hdev); | |
696 | ||
697 | if (!status) { | |
698 | hci_connect_le_scan_cleanup(conn); | |
699 | goto done; | |
700 | } | |
1d399ae5 AG |
701 | |
702 | BT_ERR("HCI request failed to create LE connection: status 0x%2.2x", | |
703 | status); | |
704 | ||
1d399ae5 AG |
705 | if (!conn) |
706 | goto done; | |
707 | ||
06c053fb | 708 | hci_le_conn_failed(conn, status); |
1d399ae5 AG |
709 | |
710 | done: | |
711 | hci_dev_unlock(hdev); | |
712 | } | |
713 | ||
2acf3d90 AG |
714 | static void hci_req_add_le_create_conn(struct hci_request *req, |
715 | struct hci_conn *conn) | |
716 | { | |
717 | struct hci_cp_le_create_conn cp; | |
718 | struct hci_dev *hdev = conn->hdev; | |
719 | u8 own_addr_type; | |
720 | ||
721 | memset(&cp, 0, sizeof(cp)); | |
722 | ||
723 | /* Update random address, but set require_privacy to false so | |
9437d2ed | 724 | * that we never connect with an non-resolvable address. |
2acf3d90 AG |
725 | */ |
726 | if (hci_update_random_address(req, false, &own_addr_type)) | |
727 | return; | |
728 | ||
2acf3d90 AG |
729 | cp.scan_interval = cpu_to_le16(hdev->le_scan_interval); |
730 | cp.scan_window = cpu_to_le16(hdev->le_scan_window); | |
731 | bacpy(&cp.peer_addr, &conn->dst); | |
732 | cp.peer_addr_type = conn->dst_type; | |
733 | cp.own_address_type = own_addr_type; | |
734 | cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval); | |
735 | cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval); | |
037fc415 MH |
736 | cp.conn_latency = cpu_to_le16(conn->le_conn_latency); |
737 | cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout); | |
dcf4adbf JP |
738 | cp.min_ce_len = cpu_to_le16(0x0000); |
739 | cp.max_ce_len = cpu_to_le16(0x0000); | |
2acf3d90 AG |
740 | |
741 | hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); | |
b46e0030 JH |
742 | |
743 | conn->state = BT_CONNECT; | |
28a667c9 | 744 | clear_bit(HCI_CONN_SCANNING, &conn->flags); |
2acf3d90 AG |
745 | } |
746 | ||
3c857757 JH |
747 | static void hci_req_directed_advertising(struct hci_request *req, |
748 | struct hci_conn *conn) | |
749 | { | |
750 | struct hci_dev *hdev = req->hdev; | |
751 | struct hci_cp_le_set_adv_param cp; | |
752 | u8 own_addr_type; | |
753 | u8 enable; | |
754 | ||
5ce194c4 | 755 | /* Clear the HCI_LE_ADV bit temporarily so that the |
3c857757 JH |
756 | * hci_update_random_address knows that it's safe to go ahead |
757 | * and write a new random address. The flag will be set back on | |
758 | * as soon as the SET_ADV_ENABLE HCI command completes. | |
759 | */ | |
a358dc11 | 760 | hci_dev_clear_flag(hdev, HCI_LE_ADV); |
3c857757 JH |
761 | |
762 | /* Set require_privacy to false so that the remote device has a | |
763 | * chance of identifying us. | |
764 | */ | |
765 | if (hci_update_random_address(req, false, &own_addr_type) < 0) | |
766 | return; | |
767 | ||
768 | memset(&cp, 0, sizeof(cp)); | |
769 | cp.type = LE_ADV_DIRECT_IND; | |
770 | cp.own_address_type = own_addr_type; | |
771 | cp.direct_addr_type = conn->dst_type; | |
772 | bacpy(&cp.direct_addr, &conn->dst); | |
773 | cp.channel_map = hdev->le_adv_channel_map; | |
774 | ||
775 | hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp); | |
776 | ||
777 | enable = 0x01; | |
778 | hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable); | |
779 | ||
780 | conn->state = BT_CONNECT; | |
781 | } | |
782 | ||
04a6c589 | 783 | struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, |
cdd6275e | 784 | u8 dst_type, u8 sec_level, u16 conn_timeout, |
e804d25d | 785 | u8 role) |
1da177e4 | 786 | { |
4292f1f3 | 787 | struct hci_conn_params *params; |
e2caced4 | 788 | struct hci_conn *conn; |
1ebfcc1f | 789 | struct smp_irk *irk; |
2acf3d90 | 790 | struct hci_request req; |
1d399ae5 | 791 | int err; |
1da177e4 | 792 | |
152d386e | 793 | /* Let's make sure that le is enabled.*/ |
d7a5a11d | 794 | if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { |
152d386e LR |
795 | if (lmp_le_capable(hdev)) |
796 | return ERR_PTR(-ECONNREFUSED); | |
797 | ||
798 | return ERR_PTR(-EOPNOTSUPP); | |
799 | } | |
800 | ||
658aead9 JH |
801 | /* Since the controller supports only one LE connection attempt at a |
802 | * time, we return -EBUSY if there is any connection attempt running. | |
803 | */ | |
804 | if (hci_lookup_le_connect(hdev)) | |
805 | return ERR_PTR(-EBUSY); | |
806 | ||
e2caced4 JH |
807 | /* If there's already a connection object but it's not in |
808 | * scanning state it means it must already be established, in | |
809 | * which case we can't do anything else except report a failure | |
810 | * to connect. | |
620ad521 | 811 | */ |
9d4c1cc1 | 812 | conn = hci_conn_hash_lookup_le(hdev, dst, dst_type); |
e2caced4 JH |
813 | if (conn && !test_bit(HCI_CONN_SCANNING, &conn->flags)) { |
814 | return ERR_PTR(-EBUSY); | |
620ad521 | 815 | } |
dfc94dbd | 816 | |
edb4b466 MH |
817 | /* When given an identity address with existing identity |
818 | * resolving key, the connection needs to be established | |
819 | * to a resolvable random address. | |
820 | * | |
edb4b466 MH |
821 | * Storing the resolvable random address is required here |
822 | * to handle connection failures. The address will later | |
823 | * be resolved back into the original identity address | |
824 | * from the connect request. | |
825 | */ | |
1ebfcc1f JH |
826 | irk = hci_find_irk_by_addr(hdev, dst, dst_type); |
827 | if (irk && bacmp(&irk->rpa, BDADDR_ANY)) { | |
828 | dst = &irk->rpa; | |
829 | dst_type = ADDR_LE_DEV_RANDOM; | |
830 | } | |
831 | ||
e2caced4 | 832 | if (conn) { |
28a667c9 JP |
833 | bacpy(&conn->dst, dst); |
834 | } else { | |
835 | conn = hci_conn_add(hdev, LE_LINK, dst, role); | |
e2caced4 JH |
836 | if (!conn) |
837 | return ERR_PTR(-ENOMEM); | |
838 | hci_conn_hold(conn); | |
839 | conn->pending_sec_level = sec_level; | |
28a667c9 JP |
840 | } |
841 | ||
1ebfcc1f | 842 | conn->dst_type = dst_type; |
620ad521 | 843 | conn->sec_level = BT_SECURITY_LOW; |
09ae260b | 844 | conn->conn_timeout = conn_timeout; |
4292f1f3 | 845 | |
3c857757 JH |
846 | hci_req_init(&req, hdev); |
847 | ||
376f54c1 JH |
848 | /* Disable advertising if we're active. For master role |
849 | * connections most controllers will refuse to connect if | |
850 | * advertising is enabled, and for slave role connections we | |
851 | * anyway have to disable it in order to start directed | |
852 | * advertising. | |
853 | */ | |
d7a5a11d | 854 | if (hci_dev_test_flag(hdev, HCI_LE_ADV)) { |
376f54c1 JH |
855 | u8 enable = 0x00; |
856 | hci_req_add(&req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), | |
857 | &enable); | |
858 | } | |
859 | ||
cdd6275e | 860 | /* If requested to connect as slave use directed advertising */ |
e804d25d | 861 | if (conn->role == HCI_ROLE_SLAVE) { |
e8bb6b97 JH |
862 | /* If we're active scanning most controllers are unable |
863 | * to initiate advertising. Simply reject the attempt. | |
864 | */ | |
d7a5a11d | 865 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN) && |
e8bb6b97 JH |
866 | hdev->le_scan_type == LE_SCAN_ACTIVE) { |
867 | skb_queue_purge(&req.cmd_q); | |
868 | hci_conn_del(conn); | |
869 | return ERR_PTR(-EBUSY); | |
870 | } | |
871 | ||
3c857757 JH |
872 | hci_req_directed_advertising(&req, conn); |
873 | goto create_conn; | |
874 | } | |
875 | ||
4292f1f3 AG |
876 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); |
877 | if (params) { | |
878 | conn->le_conn_min_interval = params->conn_min_interval; | |
879 | conn->le_conn_max_interval = params->conn_max_interval; | |
037fc415 MH |
880 | conn->le_conn_latency = params->conn_latency; |
881 | conn->le_supv_timeout = params->supervision_timeout; | |
4292f1f3 AG |
882 | } else { |
883 | conn->le_conn_min_interval = hdev->le_conn_min_interval; | |
884 | conn->le_conn_max_interval = hdev->le_conn_max_interval; | |
04fb7d90 MH |
885 | conn->le_conn_latency = hdev->le_conn_latency; |
886 | conn->le_supv_timeout = hdev->le_supv_timeout; | |
4292f1f3 | 887 | } |
eda42b50 | 888 | |
2acf3d90 | 889 | /* If controller is scanning, we stop it since some controllers are |
81ad6fd9 JH |
890 | * not able to scan and connect at the same time. Also set the |
891 | * HCI_LE_SCAN_INTERRUPTED flag so that the command complete | |
892 | * handler for scan disabling knows to set the correct discovery | |
893 | * state. | |
2acf3d90 | 894 | */ |
d7a5a11d | 895 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) { |
2acf3d90 | 896 | hci_req_add_le_scan_disable(&req); |
a1536da2 | 897 | hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED); |
2acf3d90 AG |
898 | } |
899 | ||
81ad6fd9 JH |
900 | hci_req_add_le_create_conn(&req, conn); |
901 | ||
3c857757 | 902 | create_conn: |
81ad6fd9 | 903 | err = hci_req_run(&req, create_le_conn_complete); |
2acf3d90 AG |
904 | if (err) { |
905 | hci_conn_del(conn); | |
620ad521 | 906 | return ERR_PTR(err); |
2acf3d90 | 907 | } |
fcd89c09 | 908 | |
f1e5d547 | 909 | return conn; |
d04aef4c | 910 | } |
fcd89c09 | 911 | |
f75113a2 JP |
912 | static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type) |
913 | { | |
914 | struct hci_conn *conn; | |
915 | ||
9d4c1cc1 | 916 | conn = hci_conn_hash_lookup_le(hdev, addr, type); |
f75113a2 JP |
917 | if (!conn) |
918 | return false; | |
919 | ||
f75113a2 JP |
920 | if (conn->state != BT_CONNECTED) |
921 | return false; | |
922 | ||
923 | return true; | |
924 | } | |
925 | ||
926 | /* This function requires the caller holds hdev->lock */ | |
84235d22 | 927 | static int hci_explicit_conn_params_set(struct hci_dev *hdev, |
f75113a2 JP |
928 | bdaddr_t *addr, u8 addr_type) |
929 | { | |
f75113a2 JP |
930 | struct hci_conn_params *params; |
931 | ||
932 | if (is_connected(hdev, addr, addr_type)) | |
933 | return -EISCONN; | |
934 | ||
5157b8a5 JP |
935 | params = hci_conn_params_lookup(hdev, addr, addr_type); |
936 | if (!params) { | |
937 | params = hci_conn_params_add(hdev, addr, addr_type); | |
938 | if (!params) | |
939 | return -ENOMEM; | |
940 | ||
941 | /* If we created new params, mark them to be deleted in | |
942 | * hci_connect_le_scan_cleanup. It's different case than | |
943 | * existing disabled params, those will stay after cleanup. | |
944 | */ | |
945 | params->auto_connect = HCI_AUTO_CONN_EXPLICIT; | |
946 | } | |
f75113a2 | 947 | |
5157b8a5 | 948 | /* We're trying to connect, so make sure params are at pend_le_conns */ |
49c50922 | 949 | if (params->auto_connect == HCI_AUTO_CONN_DISABLED || |
5157b8a5 JP |
950 | params->auto_connect == HCI_AUTO_CONN_REPORT || |
951 | params->auto_connect == HCI_AUTO_CONN_EXPLICIT) { | |
f75113a2 JP |
952 | list_del_init(¶ms->action); |
953 | list_add(¶ms->action, &hdev->pend_le_conns); | |
954 | } | |
955 | ||
956 | params->explicit_connect = true; | |
f75113a2 JP |
957 | |
958 | BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type, | |
959 | params->auto_connect); | |
960 | ||
961 | return 0; | |
962 | } | |
963 | ||
964 | /* This function requires the caller holds hdev->lock */ | |
965 | struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst, | |
966 | u8 dst_type, u8 sec_level, | |
0ad06aa6 | 967 | u16 conn_timeout) |
f75113a2 JP |
968 | { |
969 | struct hci_conn *conn; | |
f75113a2 JP |
970 | |
971 | /* Let's make sure that le is enabled.*/ | |
972 | if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { | |
973 | if (lmp_le_capable(hdev)) | |
974 | return ERR_PTR(-ECONNREFUSED); | |
975 | ||
976 | return ERR_PTR(-EOPNOTSUPP); | |
977 | } | |
978 | ||
979 | /* Some devices send ATT messages as soon as the physical link is | |
980 | * established. To be able to handle these ATT messages, the user- | |
981 | * space first establishes the connection and then starts the pairing | |
982 | * process. | |
983 | * | |
984 | * So if a hci_conn object already exists for the following connection | |
985 | * attempt, we simply update pending_sec_level and auth_type fields | |
986 | * and return the object found. | |
987 | */ | |
9d4c1cc1 | 988 | conn = hci_conn_hash_lookup_le(hdev, dst, dst_type); |
f75113a2 JP |
989 | if (conn) { |
990 | if (conn->pending_sec_level < sec_level) | |
991 | conn->pending_sec_level = sec_level; | |
992 | goto done; | |
993 | } | |
994 | ||
995 | BT_DBG("requesting refresh of dst_addr"); | |
996 | ||
0ad06aa6 | 997 | conn = hci_conn_add(hdev, LE_LINK, dst, HCI_ROLE_MASTER); |
f75113a2 JP |
998 | if (!conn) |
999 | return ERR_PTR(-ENOMEM); | |
1000 | ||
84235d22 | 1001 | if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0) |
f75113a2 JP |
1002 | return ERR_PTR(-EBUSY); |
1003 | ||
1004 | conn->state = BT_CONNECT; | |
1005 | set_bit(HCI_CONN_SCANNING, &conn->flags); | |
f75113a2 JP |
1006 | conn->dst_type = dst_type; |
1007 | conn->sec_level = BT_SECURITY_LOW; | |
1008 | conn->pending_sec_level = sec_level; | |
1009 | conn->conn_timeout = conn_timeout; | |
1010 | ||
84235d22 JH |
1011 | hci_update_background_scan(hdev); |
1012 | ||
f75113a2 JP |
1013 | done: |
1014 | hci_conn_hold(conn); | |
1015 | return conn; | |
1016 | } | |
1017 | ||
04a6c589 AG |
1018 | struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst, |
1019 | u8 sec_level, u8 auth_type) | |
1da177e4 LT |
1020 | { |
1021 | struct hci_conn *acl; | |
fcd89c09 | 1022 | |
d7a5a11d | 1023 | if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) { |
c411110e LR |
1024 | if (lmp_bredr_capable(hdev)) |
1025 | return ERR_PTR(-ECONNREFUSED); | |
1026 | ||
beb19e4c | 1027 | return ERR_PTR(-EOPNOTSUPP); |
c411110e | 1028 | } |
56f87901 | 1029 | |
70f23020 AE |
1030 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
1031 | if (!acl) { | |
a5c4e309 | 1032 | acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER); |
70f23020 | 1033 | if (!acl) |
48c7aba9 | 1034 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
1035 | } |
1036 | ||
1037 | hci_conn_hold(acl); | |
1038 | ||
09ab6f4c | 1039 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
1040 | acl->sec_level = BT_SECURITY_LOW; |
1041 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 1042 | acl->auth_type = auth_type; |
1aef8669 | 1043 | hci_acl_create_connection(acl); |
09ab6f4c | 1044 | } |
1da177e4 | 1045 | |
db474275 VCG |
1046 | return acl; |
1047 | } | |
1048 | ||
10c62ddc FD |
1049 | struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst, |
1050 | __u16 setting) | |
db474275 VCG |
1051 | { |
1052 | struct hci_conn *acl; | |
1053 | struct hci_conn *sco; | |
1054 | ||
e660ed6c | 1055 | acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
db474275 | 1056 | if (IS_ERR(acl)) |
5b7f9909 | 1057 | return acl; |
1da177e4 | 1058 | |
70f23020 AE |
1059 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
1060 | if (!sco) { | |
a5c4e309 | 1061 | sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER); |
70f23020 | 1062 | if (!sco) { |
76a68ba0 | 1063 | hci_conn_drop(acl); |
48c7aba9 | 1064 | return ERR_PTR(-ENOMEM); |
1da177e4 | 1065 | } |
5b7f9909 | 1066 | } |
1da177e4 | 1067 | |
5b7f9909 MH |
1068 | acl->link = sco; |
1069 | sco->link = acl; | |
1da177e4 | 1070 | |
5b7f9909 | 1071 | hci_conn_hold(sco); |
1da177e4 | 1072 | |
10c62ddc FD |
1073 | sco->setting = setting; |
1074 | ||
5b7f9909 | 1075 | if (acl->state == BT_CONNECTED && |
5974e4c4 | 1076 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
58a681ef | 1077 | set_bit(HCI_CONN_POWER_SAVE, &acl->flags); |
14b12d0b | 1078 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 1079 | |
51a8efd7 | 1080 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { |
e73439d8 | 1081 | /* defer SCO setup until mode change completed */ |
51a8efd7 | 1082 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); |
e73439d8 MH |
1083 | return sco; |
1084 | } | |
1085 | ||
1086 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 1087 | } |
5b7f9909 MH |
1088 | |
1089 | return sco; | |
1da177e4 | 1090 | } |
1da177e4 | 1091 | |
e7c29cb1 MH |
1092 | /* Check link security requirement */ |
1093 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
1094 | { | |
38b3fef1 | 1095 | BT_DBG("hcon %p", conn); |
e7c29cb1 | 1096 | |
40b552aa MH |
1097 | /* In Secure Connections Only mode, it is required that Secure |
1098 | * Connections is used and the link is encrypted with AES-CCM | |
1099 | * using a P-256 authenticated combination key. | |
1100 | */ | |
d7a5a11d | 1101 | if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) { |
40b552aa MH |
1102 | if (!hci_conn_sc_enabled(conn) || |
1103 | !test_bit(HCI_CONN_AES_CCM, &conn->flags) || | |
1104 | conn->key_type != HCI_LK_AUTH_COMBINATION_P256) | |
1105 | return 0; | |
1106 | } | |
1107 | ||
4dae2798 JH |
1108 | if (hci_conn_ssp_enabled(conn) && |
1109 | !test_bit(HCI_CONN_ENCRYPT, &conn->flags)) | |
e7c29cb1 MH |
1110 | return 0; |
1111 | ||
1112 | return 1; | |
1113 | } | |
e7c29cb1 | 1114 | |
1da177e4 | 1115 | /* Authenticate remote device */ |
0684e5f9 | 1116 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 | 1117 | { |
38b3fef1 | 1118 | BT_DBG("hcon %p", conn); |
1da177e4 | 1119 | |
765c2a96 JH |
1120 | if (conn->pending_sec_level > sec_level) |
1121 | sec_level = conn->pending_sec_level; | |
1122 | ||
96a31833 | 1123 | if (sec_level > conn->sec_level) |
765c2a96 | 1124 | conn->pending_sec_level = sec_level; |
4dae2798 | 1125 | else if (test_bit(HCI_CONN_AUTH, &conn->flags)) |
1da177e4 LT |
1126 | return 1; |
1127 | ||
65cf686e JH |
1128 | /* Make sure we preserve an existing MITM requirement*/ |
1129 | auth_type |= (conn->auth_type & 0x01); | |
1130 | ||
96a31833 MH |
1131 | conn->auth_type = auth_type; |
1132 | ||
51a8efd7 | 1133 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 1134 | struct hci_cp_auth_requested cp; |
b7d05bad | 1135 | |
aca3192c | 1136 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 1137 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
5974e4c4 | 1138 | sizeof(cp), &cp); |
09da1f34 JH |
1139 | |
1140 | /* If we're already encrypted set the REAUTH_PEND flag, | |
1141 | * otherwise set the ENCRYPT_PEND. | |
1142 | */ | |
4dae2798 | 1143 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) |
51a8efd7 | 1144 | set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); |
09da1f34 JH |
1145 | else |
1146 | set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); | |
1da177e4 | 1147 | } |
8c1b2355 | 1148 | |
1da177e4 LT |
1149 | return 0; |
1150 | } | |
1da177e4 | 1151 | |
13d39315 WR |
1152 | /* Encrypt the the link */ |
1153 | static void hci_conn_encrypt(struct hci_conn *conn) | |
1154 | { | |
38b3fef1 | 1155 | BT_DBG("hcon %p", conn); |
13d39315 | 1156 | |
51a8efd7 | 1157 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { |
13d39315 WR |
1158 | struct hci_cp_set_conn_encrypt cp; |
1159 | cp.handle = cpu_to_le16(conn->handle); | |
1160 | cp.encrypt = 0x01; | |
1161 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
5974e4c4 | 1162 | &cp); |
13d39315 WR |
1163 | } |
1164 | } | |
1165 | ||
8c1b2355 | 1166 | /* Enable security */ |
e7cafc45 JH |
1167 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type, |
1168 | bool initiator) | |
1da177e4 | 1169 | { |
38b3fef1 | 1170 | BT_DBG("hcon %p", conn); |
1da177e4 | 1171 | |
d8343f12 VCG |
1172 | if (conn->type == LE_LINK) |
1173 | return smp_conn_security(conn, sec_level); | |
1174 | ||
13d39315 | 1175 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
1176 | if (sec_level == BT_SECURITY_SDP) |
1177 | return 1; | |
1178 | ||
13d39315 WR |
1179 | /* For non 2.1 devices and low security level we don't need the link |
1180 | key. */ | |
aa64a8b5 | 1181 | if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) |
3fdca1e1 | 1182 | return 1; |
8c1b2355 | 1183 | |
13d39315 | 1184 | /* For other security levels we need the link key. */ |
4dae2798 | 1185 | if (!test_bit(HCI_CONN_AUTH, &conn->flags)) |
13d39315 WR |
1186 | goto auth; |
1187 | ||
7b5a9241 MH |
1188 | /* An authenticated FIPS approved combination key has sufficient |
1189 | * security for security level 4. */ | |
1190 | if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 && | |
1191 | sec_level == BT_SECURITY_FIPS) | |
1192 | goto encrypt; | |
1193 | ||
1194 | /* An authenticated combination key has sufficient security for | |
1195 | security level 3. */ | |
1196 | if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 || | |
1197 | conn->key_type == HCI_LK_AUTH_COMBINATION_P256) && | |
1198 | sec_level == BT_SECURITY_HIGH) | |
13d39315 WR |
1199 | goto encrypt; |
1200 | ||
1201 | /* An unauthenticated combination key has sufficient security for | |
1202 | security level 1 and 2. */ | |
66138ce8 MH |
1203 | if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 || |
1204 | conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) && | |
5974e4c4 | 1205 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW)) |
13d39315 WR |
1206 | goto encrypt; |
1207 | ||
1208 | /* A combination key has always sufficient security for the security | |
1209 | levels 1 or 2. High security level requires the combination key | |
1210 | is generated using maximum PIN code length (16). | |
1211 | For pre 2.1 units. */ | |
1212 | if (conn->key_type == HCI_LK_COMBINATION && | |
7b5a9241 MH |
1213 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW || |
1214 | conn->pin_length == 16)) | |
13d39315 WR |
1215 | goto encrypt; |
1216 | ||
1217 | auth: | |
51a8efd7 | 1218 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) |
1da177e4 LT |
1219 | return 0; |
1220 | ||
977f8fce JH |
1221 | if (initiator) |
1222 | set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); | |
1223 | ||
6fdf658c LAD |
1224 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
1225 | return 0; | |
13d39315 WR |
1226 | |
1227 | encrypt: | |
4dae2798 | 1228 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) |
13d39315 | 1229 | return 1; |
8c1b2355 | 1230 | |
13d39315 | 1231 | hci_conn_encrypt(conn); |
1da177e4 LT |
1232 | return 0; |
1233 | } | |
8c1b2355 | 1234 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 1235 | |
b3b1b061 WR |
1236 | /* Check secure link requirement */ |
1237 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
1238 | { | |
38b3fef1 | 1239 | BT_DBG("hcon %p", conn); |
b3b1b061 | 1240 | |
9cb2e030 MH |
1241 | /* Accept if non-secure or higher security level is required */ |
1242 | if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS) | |
1243 | return 1; | |
b3b1b061 | 1244 | |
9cb2e030 MH |
1245 | /* Accept if secure or higher security level is already present */ |
1246 | if (conn->sec_level == BT_SECURITY_HIGH || | |
1247 | conn->sec_level == BT_SECURITY_FIPS) | |
b3b1b061 WR |
1248 | return 1; |
1249 | ||
9cb2e030 MH |
1250 | /* Reject not secure link */ |
1251 | return 0; | |
b3b1b061 WR |
1252 | } |
1253 | EXPORT_SYMBOL(hci_conn_check_secure); | |
1254 | ||
1da177e4 | 1255 | /* Switch role */ |
8c1b2355 | 1256 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 | 1257 | { |
38b3fef1 | 1258 | BT_DBG("hcon %p", conn); |
1da177e4 | 1259 | |
40bef302 | 1260 | if (role == conn->role) |
1da177e4 LT |
1261 | return 1; |
1262 | ||
51a8efd7 | 1263 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { |
1da177e4 LT |
1264 | struct hci_cp_switch_role cp; |
1265 | bacpy(&cp.bdaddr, &conn->dst); | |
1266 | cp.role = role; | |
a9de9248 | 1267 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 1268 | } |
8c1b2355 | 1269 | |
1da177e4 LT |
1270 | return 0; |
1271 | } | |
1272 | EXPORT_SYMBOL(hci_conn_switch_role); | |
1273 | ||
04837f64 | 1274 | /* Enter active mode */ |
14b12d0b | 1275 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
1276 | { |
1277 | struct hci_dev *hdev = conn->hdev; | |
1278 | ||
38b3fef1 | 1279 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
04837f64 | 1280 | |
14b12d0b JG |
1281 | if (conn->mode != HCI_CM_SNIFF) |
1282 | goto timer; | |
1283 | ||
58a681ef | 1284 | if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) |
04837f64 MH |
1285 | goto timer; |
1286 | ||
51a8efd7 | 1287 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
04837f64 | 1288 | struct hci_cp_exit_sniff_mode cp; |
aca3192c | 1289 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 1290 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
1291 | } |
1292 | ||
1293 | timer: | |
1294 | if (hdev->idle_timeout > 0) | |
a74a84f6 JH |
1295 | queue_delayed_work(hdev->workqueue, &conn->idle_work, |
1296 | msecs_to_jiffies(hdev->idle_timeout)); | |
04837f64 MH |
1297 | } |
1298 | ||
1da177e4 LT |
1299 | /* Drop all connection on the device */ |
1300 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
1301 | { | |
1302 | struct hci_conn_hash *h = &hdev->conn_hash; | |
3c4e0df0 | 1303 | struct hci_conn *c, *n; |
1da177e4 LT |
1304 | |
1305 | BT_DBG("hdev %s", hdev->name); | |
1306 | ||
3c4e0df0 | 1307 | list_for_each_entry_safe(c, n, &h->list, list) { |
1da177e4 LT |
1308 | c->state = BT_CLOSED; |
1309 | ||
3a6d576b | 1310 | hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); |
1da177e4 LT |
1311 | hci_conn_del(c); |
1312 | } | |
1313 | } | |
1314 | ||
a9de9248 MH |
1315 | /* Check pending connect attempts */ |
1316 | void hci_conn_check_pending(struct hci_dev *hdev) | |
1317 | { | |
1318 | struct hci_conn *conn; | |
1319 | ||
1320 | BT_DBG("hdev %s", hdev->name); | |
1321 | ||
1322 | hci_dev_lock(hdev); | |
1323 | ||
1324 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
1325 | if (conn) | |
1aef8669 | 1326 | hci_acl_create_connection(conn); |
a9de9248 MH |
1327 | |
1328 | hci_dev_unlock(hdev); | |
1329 | } | |
1330 | ||
4dae2798 JH |
1331 | static u32 get_link_mode(struct hci_conn *conn) |
1332 | { | |
1333 | u32 link_mode = 0; | |
1334 | ||
40bef302 | 1335 | if (conn->role == HCI_ROLE_MASTER) |
4dae2798 JH |
1336 | link_mode |= HCI_LM_MASTER; |
1337 | ||
1338 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) | |
1339 | link_mode |= HCI_LM_ENCRYPT; | |
1340 | ||
1341 | if (test_bit(HCI_CONN_AUTH, &conn->flags)) | |
1342 | link_mode |= HCI_LM_AUTH; | |
1343 | ||
1344 | if (test_bit(HCI_CONN_SECURE, &conn->flags)) | |
1345 | link_mode |= HCI_LM_SECURE; | |
1346 | ||
1347 | if (test_bit(HCI_CONN_FIPS, &conn->flags)) | |
1348 | link_mode |= HCI_LM_FIPS; | |
1349 | ||
1350 | return link_mode; | |
1351 | } | |
1352 | ||
1da177e4 LT |
1353 | int hci_get_conn_list(void __user *arg) |
1354 | { | |
fc5fef61 | 1355 | struct hci_conn *c; |
1da177e4 LT |
1356 | struct hci_conn_list_req req, *cl; |
1357 | struct hci_conn_info *ci; | |
1358 | struct hci_dev *hdev; | |
1da177e4 LT |
1359 | int n = 0, size, err; |
1360 | ||
1361 | if (copy_from_user(&req, arg, sizeof(req))) | |
1362 | return -EFAULT; | |
1363 | ||
1364 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
1365 | return -EINVAL; | |
1366 | ||
1367 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
1368 | ||
70f23020 AE |
1369 | cl = kmalloc(size, GFP_KERNEL); |
1370 | if (!cl) | |
1da177e4 LT |
1371 | return -ENOMEM; |
1372 | ||
70f23020 AE |
1373 | hdev = hci_dev_get(req.dev_id); |
1374 | if (!hdev) { | |
1da177e4 LT |
1375 | kfree(cl); |
1376 | return -ENODEV; | |
1377 | } | |
1378 | ||
1379 | ci = cl->conn_info; | |
1380 | ||
09fd0de5 | 1381 | hci_dev_lock(hdev); |
8035ded4 | 1382 | list_for_each_entry(c, &hdev->conn_hash.list, list) { |
1da177e4 LT |
1383 | bacpy(&(ci + n)->bdaddr, &c->dst); |
1384 | (ci + n)->handle = c->handle; | |
1385 | (ci + n)->type = c->type; | |
1386 | (ci + n)->out = c->out; | |
1387 | (ci + n)->state = c->state; | |
4dae2798 | 1388 | (ci + n)->link_mode = get_link_mode(c); |
1da177e4 LT |
1389 | if (++n >= req.conn_num) |
1390 | break; | |
1391 | } | |
09fd0de5 | 1392 | hci_dev_unlock(hdev); |
1da177e4 LT |
1393 | |
1394 | cl->dev_id = hdev->id; | |
1395 | cl->conn_num = n; | |
1396 | size = sizeof(req) + n * sizeof(*ci); | |
1397 | ||
1398 | hci_dev_put(hdev); | |
1399 | ||
1400 | err = copy_to_user(arg, cl, size); | |
1401 | kfree(cl); | |
1402 | ||
1403 | return err ? -EFAULT : 0; | |
1404 | } | |
1405 | ||
1406 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
1407 | { | |
1408 | struct hci_conn_info_req req; | |
1409 | struct hci_conn_info ci; | |
1410 | struct hci_conn *conn; | |
1411 | char __user *ptr = arg + sizeof(req); | |
1412 | ||
1413 | if (copy_from_user(&req, arg, sizeof(req))) | |
1414 | return -EFAULT; | |
1415 | ||
09fd0de5 | 1416 | hci_dev_lock(hdev); |
1da177e4 LT |
1417 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); |
1418 | if (conn) { | |
1419 | bacpy(&ci.bdaddr, &conn->dst); | |
1420 | ci.handle = conn->handle; | |
1421 | ci.type = conn->type; | |
1422 | ci.out = conn->out; | |
1423 | ci.state = conn->state; | |
4dae2798 | 1424 | ci.link_mode = get_link_mode(conn); |
1da177e4 | 1425 | } |
09fd0de5 | 1426 | hci_dev_unlock(hdev); |
1da177e4 LT |
1427 | |
1428 | if (!conn) | |
1429 | return -ENOENT; | |
1430 | ||
1431 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
1432 | } | |
40be492f MH |
1433 | |
1434 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
1435 | { | |
1436 | struct hci_auth_info_req req; | |
1437 | struct hci_conn *conn; | |
1438 | ||
1439 | if (copy_from_user(&req, arg, sizeof(req))) | |
1440 | return -EFAULT; | |
1441 | ||
09fd0de5 | 1442 | hci_dev_lock(hdev); |
40be492f MH |
1443 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); |
1444 | if (conn) | |
1445 | req.type = conn->auth_type; | |
09fd0de5 | 1446 | hci_dev_unlock(hdev); |
40be492f MH |
1447 | |
1448 | if (!conn) | |
1449 | return -ENOENT; | |
1450 | ||
1451 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
1452 | } | |
73d80deb LAD |
1453 | |
1454 | struct hci_chan *hci_chan_create(struct hci_conn *conn) | |
1455 | { | |
1456 | struct hci_dev *hdev = conn->hdev; | |
1457 | struct hci_chan *chan; | |
1458 | ||
38b3fef1 | 1459 | BT_DBG("%s hcon %p", hdev->name, conn); |
73d80deb | 1460 | |
f94b665d JH |
1461 | if (test_bit(HCI_CONN_DROP, &conn->flags)) { |
1462 | BT_DBG("Refusing to create new hci_chan"); | |
1463 | return NULL; | |
1464 | } | |
1465 | ||
27f70f3e | 1466 | chan = kzalloc(sizeof(*chan), GFP_KERNEL); |
73d80deb LAD |
1467 | if (!chan) |
1468 | return NULL; | |
1469 | ||
6c388d32 | 1470 | chan->conn = hci_conn_get(conn); |
73d80deb | 1471 | skb_queue_head_init(&chan->data_q); |
168df8e5 | 1472 | chan->state = BT_CONNECTED; |
73d80deb | 1473 | |
8192edef | 1474 | list_add_rcu(&chan->list, &conn->chan_list); |
73d80deb LAD |
1475 | |
1476 | return chan; | |
1477 | } | |
1478 | ||
9472007c | 1479 | void hci_chan_del(struct hci_chan *chan) |
73d80deb LAD |
1480 | { |
1481 | struct hci_conn *conn = chan->conn; | |
1482 | struct hci_dev *hdev = conn->hdev; | |
1483 | ||
38b3fef1 | 1484 | BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan); |
73d80deb | 1485 | |
8192edef GP |
1486 | list_del_rcu(&chan->list); |
1487 | ||
1488 | synchronize_rcu(); | |
73d80deb | 1489 | |
bcbb655a | 1490 | /* Prevent new hci_chan's to be created for this hci_conn */ |
f94b665d | 1491 | set_bit(HCI_CONN_DROP, &conn->flags); |
b3ff670a | 1492 | |
6c388d32 | 1493 | hci_conn_put(conn); |
e9b02748 | 1494 | |
73d80deb LAD |
1495 | skb_queue_purge(&chan->data_q); |
1496 | kfree(chan); | |
73d80deb LAD |
1497 | } |
1498 | ||
2c33c06a | 1499 | void hci_chan_list_flush(struct hci_conn *conn) |
73d80deb | 1500 | { |
2a5a5ec6 | 1501 | struct hci_chan *chan, *n; |
73d80deb | 1502 | |
38b3fef1 | 1503 | BT_DBG("hcon %p", conn); |
73d80deb | 1504 | |
2a5a5ec6 | 1505 | list_for_each_entry_safe(chan, n, &conn->chan_list, list) |
73d80deb LAD |
1506 | hci_chan_del(chan); |
1507 | } | |
42c4e53e AE |
1508 | |
1509 | static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon, | |
1510 | __u16 handle) | |
1511 | { | |
1512 | struct hci_chan *hchan; | |
1513 | ||
1514 | list_for_each_entry(hchan, &hcon->chan_list, list) { | |
1515 | if (hchan->handle == handle) | |
1516 | return hchan; | |
1517 | } | |
1518 | ||
1519 | return NULL; | |
1520 | } | |
1521 | ||
1522 | struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle) | |
1523 | { | |
1524 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1525 | struct hci_conn *hcon; | |
1526 | struct hci_chan *hchan = NULL; | |
1527 | ||
1528 | rcu_read_lock(); | |
1529 | ||
1530 | list_for_each_entry_rcu(hcon, &h->list, list) { | |
1531 | hchan = __hci_chan_lookup_handle(hcon, handle); | |
1532 | if (hchan) | |
1533 | break; | |
1534 | } | |
1535 | ||
1536 | rcu_read_unlock(); | |
1537 | ||
1538 | return hchan; | |
1539 | } |