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; | |
71 | struct smp_irk *irk; | |
72 | bdaddr_t *bdaddr; | |
73 | u8 bdaddr_type; | |
74 | ||
75 | bdaddr = &conn->dst; | |
76 | bdaddr_type = conn->dst_type; | |
77 | ||
78 | /* Check if we need to convert to identity address */ | |
79 | irk = hci_get_irk(conn->hdev, bdaddr, bdaddr_type); | |
80 | if (irk) { | |
81 | bdaddr = &irk->bdaddr; | |
82 | bdaddr_type = irk->addr_type; | |
83 | } | |
84 | ||
85 | params = hci_explicit_connect_lookup(conn->hdev, bdaddr, bdaddr_type); | |
86 | if (!params) | |
87 | return; | |
88 | ||
89 | /* The connection attempt was doing scan for new RPA, and is | |
90 | * in scan phase. If params are not associated with any other | |
91 | * autoconnect action, remove them completely. If they are, just unmark | |
92 | * them as waiting for connection, by clearing explicit_connect field. | |
93 | */ | |
94 | if (params->auto_connect == HCI_AUTO_CONN_EXPLICIT) | |
95 | hci_conn_params_del(conn->hdev, bdaddr, bdaddr_type); | |
96 | else | |
97 | params->explicit_connect = false; | |
98 | } | |
99 | ||
100 | /* This function requires the caller holds hdev->lock */ | |
101 | static void hci_connect_le_scan_remove(struct hci_conn *conn) | |
102 | { | |
103 | hci_connect_le_scan_cleanup(conn); | |
104 | ||
105 | hci_conn_hash_del(conn->hdev, conn); | |
106 | hci_update_background_scan(conn->hdev); | |
107 | } | |
108 | ||
1aef8669 | 109 | static void hci_acl_create_connection(struct hci_conn *conn) |
1da177e4 LT |
110 | { |
111 | struct hci_dev *hdev = conn->hdev; | |
112 | struct inquiry_entry *ie; | |
113 | struct hci_cp_create_conn cp; | |
114 | ||
42d2d87c | 115 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
116 | |
117 | conn->state = BT_CONNECT; | |
a0c808b3 | 118 | conn->out = true; |
40bef302 | 119 | conn->role = HCI_ROLE_MASTER; |
1da177e4 | 120 | |
4c67bc74 MH |
121 | conn->attempt++; |
122 | ||
e4e8e37c MH |
123 | conn->link_policy = hdev->link_policy; |
124 | ||
1da177e4 LT |
125 | memset(&cp, 0, sizeof(cp)); |
126 | bacpy(&cp.bdaddr, &conn->dst); | |
127 | cp.pscan_rep_mode = 0x02; | |
128 | ||
70f23020 AE |
129 | ie = hci_inquiry_cache_lookup(hdev, &conn->dst); |
130 | if (ie) { | |
41a96212 MH |
131 | if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { |
132 | cp.pscan_rep_mode = ie->data.pscan_rep_mode; | |
133 | cp.pscan_mode = ie->data.pscan_mode; | |
134 | cp.clock_offset = ie->data.clock_offset | | |
dcf4adbf | 135 | cpu_to_le16(0x8000); |
41a96212 MH |
136 | } |
137 | ||
1da177e4 | 138 | memcpy(conn->dev_class, ie->data.dev_class, 3); |
58a681ef JH |
139 | if (ie->data.ssp_mode > 0) |
140 | set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); | |
1da177e4 LT |
141 | } |
142 | ||
a8746417 | 143 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 144 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) |
b6a0dc82 | 145 | cp.role_switch = 0x01; |
1da177e4 | 146 | else |
b6a0dc82 | 147 | cp.role_switch = 0x00; |
4c67bc74 | 148 | |
a9de9248 | 149 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); |
1da177e4 LT |
150 | } |
151 | ||
1aef8669 | 152 | static void hci_acl_create_connection_cancel(struct hci_conn *conn) |
6ac59344 MH |
153 | { |
154 | struct hci_cp_create_conn_cancel cp; | |
155 | ||
38b3fef1 | 156 | BT_DBG("hcon %p", conn); |
6ac59344 | 157 | |
d095c1eb | 158 | if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2) |
6ac59344 MH |
159 | return; |
160 | ||
161 | bacpy(&cp.bdaddr, &conn->dst); | |
a9de9248 | 162 | hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); |
6ac59344 MH |
163 | } |
164 | ||
93796fa6 CT |
165 | static void hci_reject_sco(struct hci_conn *conn) |
166 | { | |
167 | struct hci_cp_reject_sync_conn_req cp; | |
168 | ||
d41c15cf | 169 | cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES; |
93796fa6 CT |
170 | bacpy(&cp.bdaddr, &conn->dst); |
171 | ||
172 | hci_send_cmd(conn->hdev, HCI_OP_REJECT_SYNC_CONN_REQ, sizeof(cp), &cp); | |
173 | } | |
174 | ||
e3b679d5 | 175 | int hci_disconnect(struct hci_conn *conn, __u8 reason) |
1da177e4 LT |
176 | { |
177 | struct hci_cp_disconnect cp; | |
178 | ||
38b3fef1 | 179 | BT_DBG("hcon %p", conn); |
1da177e4 | 180 | |
839035a7 JH |
181 | /* When we are master of an established connection and it enters |
182 | * the disconnect timeout, then go ahead and try to read the | |
183 | * current clock offset. Processing of the result is done | |
184 | * within the event handling and hci_clock_offset_evt function. | |
185 | */ | |
186 | if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER) { | |
187 | struct hci_dev *hdev = conn->hdev; | |
4f639ede | 188 | struct hci_cp_read_clock_offset clkoff_cp; |
839035a7 | 189 | |
4f639ede FF |
190 | clkoff_cp.handle = cpu_to_le16(conn->handle); |
191 | hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp), | |
192 | &clkoff_cp); | |
839035a7 JH |
193 | } |
194 | ||
1da177e4 LT |
195 | conn->state = BT_DISCONN; |
196 | ||
aca3192c | 197 | cp.handle = cpu_to_le16(conn->handle); |
1da177e4 | 198 | cp.reason = reason; |
e3b679d5 | 199 | return hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); |
1da177e4 LT |
200 | } |
201 | ||
a2b1976b | 202 | static void hci_amp_disconn(struct hci_conn *conn) |
53502d69 AE |
203 | { |
204 | struct hci_cp_disconn_phy_link cp; | |
205 | ||
206 | BT_DBG("hcon %p", conn); | |
207 | ||
208 | conn->state = BT_DISCONN; | |
209 | ||
210 | cp.phy_handle = HCI_PHY_HANDLE(conn->handle); | |
a2b1976b | 211 | cp.reason = hci_proto_disconn_ind(conn); |
53502d69 AE |
212 | hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK, |
213 | sizeof(cp), &cp); | |
214 | } | |
215 | ||
57f5d0d1 | 216 | static void hci_add_sco(struct hci_conn *conn, __u16 handle) |
1da177e4 LT |
217 | { |
218 | struct hci_dev *hdev = conn->hdev; | |
219 | struct hci_cp_add_sco cp; | |
220 | ||
38b3fef1 | 221 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
222 | |
223 | conn->state = BT_CONNECT; | |
a0c808b3 | 224 | conn->out = true; |
1da177e4 | 225 | |
efc7688b MH |
226 | conn->attempt++; |
227 | ||
aca3192c | 228 | cp.handle = cpu_to_le16(handle); |
a8746417 | 229 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 230 | |
a9de9248 | 231 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); |
1da177e4 LT |
232 | } |
233 | ||
2dea632f | 234 | bool hci_setup_sync(struct hci_conn *conn, __u16 handle) |
b6a0dc82 MH |
235 | { |
236 | struct hci_dev *hdev = conn->hdev; | |
237 | struct hci_cp_setup_sync_conn cp; | |
2dea632f | 238 | const struct sco_param *param; |
b6a0dc82 | 239 | |
38b3fef1 | 240 | BT_DBG("hcon %p", conn); |
b6a0dc82 MH |
241 | |
242 | conn->state = BT_CONNECT; | |
a0c808b3 | 243 | conn->out = true; |
b6a0dc82 | 244 | |
efc7688b MH |
245 | conn->attempt++; |
246 | ||
b6a0dc82 | 247 | cp.handle = cpu_to_le16(handle); |
b6a0dc82 | 248 | |
dcf4adbf JP |
249 | cp.tx_bandwidth = cpu_to_le32(0x00001f40); |
250 | cp.rx_bandwidth = cpu_to_le32(0x00001f40); | |
10c62ddc FD |
251 | cp.voice_setting = cpu_to_le16(conn->setting); |
252 | ||
253 | switch (conn->setting & SCO_AIRMODE_MASK) { | |
254 | case SCO_AIRMODE_TRANSP: | |
565766b0 | 255 | if (conn->attempt > ARRAY_SIZE(esco_param_msbc)) |
2dea632f | 256 | return false; |
565766b0 | 257 | param = &esco_param_msbc[conn->attempt - 1]; |
10c62ddc FD |
258 | break; |
259 | case SCO_AIRMODE_CVSD: | |
48e68ff5 BT |
260 | if (lmp_esco_capable(conn->link)) { |
261 | if (conn->attempt > ARRAY_SIZE(esco_param_cvsd)) | |
262 | return false; | |
48e68ff5 BT |
263 | param = &esco_param_cvsd[conn->attempt - 1]; |
264 | } else { | |
265 | if (conn->attempt > ARRAY_SIZE(sco_param_cvsd)) | |
266 | return false; | |
48e68ff5 BT |
267 | param = &sco_param_cvsd[conn->attempt - 1]; |
268 | } | |
10c62ddc | 269 | break; |
2dea632f FD |
270 | default: |
271 | return false; | |
10c62ddc | 272 | } |
b6a0dc82 | 273 | |
c7da5797 | 274 | cp.retrans_effort = param->retrans_effort; |
2dea632f FD |
275 | cp.pkt_type = __cpu_to_le16(param->pkt_type); |
276 | cp.max_latency = __cpu_to_le16(param->max_latency); | |
277 | ||
278 | if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0) | |
279 | return false; | |
280 | ||
281 | return true; | |
b6a0dc82 MH |
282 | } |
283 | ||
7d6ca693 JH |
284 | u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency, |
285 | u16 to_multiplier) | |
2ce603eb | 286 | { |
2ce603eb | 287 | struct hci_dev *hdev = conn->hdev; |
f044eb05 MH |
288 | struct hci_conn_params *params; |
289 | struct hci_cp_le_conn_update cp; | |
2ce603eb | 290 | |
f044eb05 | 291 | hci_dev_lock(hdev); |
2ce603eb | 292 | |
f044eb05 MH |
293 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); |
294 | if (params) { | |
295 | params->conn_min_interval = min; | |
296 | params->conn_max_interval = max; | |
297 | params->conn_latency = latency; | |
298 | params->supervision_timeout = to_multiplier; | |
299 | } | |
300 | ||
301 | hci_dev_unlock(hdev); | |
302 | ||
303 | memset(&cp, 0, sizeof(cp)); | |
2ce603eb CT |
304 | cp.handle = cpu_to_le16(conn->handle); |
305 | cp.conn_interval_min = cpu_to_le16(min); | |
306 | cp.conn_interval_max = cpu_to_le16(max); | |
307 | cp.conn_latency = cpu_to_le16(latency); | |
308 | cp.supervision_timeout = cpu_to_le16(to_multiplier); | |
dcf4adbf JP |
309 | cp.min_ce_len = cpu_to_le16(0x0000); |
310 | cp.max_ce_len = cpu_to_le16(0x0000); | |
2ce603eb CT |
311 | |
312 | hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); | |
7d6ca693 JH |
313 | |
314 | if (params) | |
315 | return 0x01; | |
316 | ||
317 | return 0x00; | |
2ce603eb | 318 | } |
2ce603eb | 319 | |
fe39c7b2 | 320 | void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand, |
8b76ce34 | 321 | __u8 ltk[16], __u8 key_size) |
a7a595f6 VCG |
322 | { |
323 | struct hci_dev *hdev = conn->hdev; | |
324 | struct hci_cp_le_start_enc cp; | |
325 | ||
38b3fef1 | 326 | BT_DBG("hcon %p", conn); |
a7a595f6 VCG |
327 | |
328 | memset(&cp, 0, sizeof(cp)); | |
329 | ||
330 | cp.handle = cpu_to_le16(conn->handle); | |
fe39c7b2 | 331 | cp.rand = rand; |
a7a595f6 | 332 | cp.ediv = ediv; |
8b76ce34 | 333 | memcpy(cp.ltk, ltk, key_size); |
a7a595f6 VCG |
334 | |
335 | hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); | |
336 | } | |
a7a595f6 | 337 | |
e73439d8 MH |
338 | /* Device _must_ be locked */ |
339 | void hci_sco_setup(struct hci_conn *conn, __u8 status) | |
340 | { | |
341 | struct hci_conn *sco = conn->link; | |
342 | ||
e73439d8 MH |
343 | if (!sco) |
344 | return; | |
345 | ||
38b3fef1 AE |
346 | BT_DBG("hcon %p", conn); |
347 | ||
e73439d8 MH |
348 | if (!status) { |
349 | if (lmp_esco_capable(conn->hdev)) | |
350 | hci_setup_sync(sco, conn->handle); | |
351 | else | |
352 | hci_add_sco(sco, conn->handle); | |
353 | } else { | |
539c496d | 354 | hci_connect_cfm(sco, status); |
e73439d8 MH |
355 | hci_conn_del(sco); |
356 | } | |
357 | } | |
358 | ||
19c40e3b | 359 | static void hci_conn_timeout(struct work_struct *work) |
1da177e4 | 360 | { |
19c40e3b | 361 | struct hci_conn *conn = container_of(work, struct hci_conn, |
5974e4c4 | 362 | disc_work.work); |
1d56dc4f | 363 | int refcnt = atomic_read(&conn->refcnt); |
1da177e4 | 364 | |
38b3fef1 | 365 | BT_DBG("hcon %p state %s", conn, state_to_string(conn->state)); |
1da177e4 | 366 | |
1d56dc4f LR |
367 | WARN_ON(refcnt < 0); |
368 | ||
369 | /* FIXME: It was observed that in pairing failed scenario, refcnt | |
370 | * drops below 0. Probably this is because l2cap_conn_del calls | |
371 | * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is | |
372 | * dropped. After that loop hci_chan_del is called which also drops | |
373 | * conn. For now make sure that ACL is alive if refcnt is higher then 0, | |
374 | * otherwise drop it. | |
375 | */ | |
376 | if (refcnt > 0) | |
1da177e4 LT |
377 | return; |
378 | ||
6ac59344 MH |
379 | switch (conn->state) { |
380 | case BT_CONNECT: | |
769be974 | 381 | case BT_CONNECT2: |
fcd89c09 VT |
382 | if (conn->out) { |
383 | if (conn->type == ACL_LINK) | |
1aef8669 | 384 | hci_acl_create_connection_cancel(conn); |
cc2b6911 JP |
385 | else if (conn->type == LE_LINK) { |
386 | if (test_bit(HCI_CONN_SCANNING, &conn->flags)) | |
387 | hci_connect_le_scan_remove(conn); | |
388 | else | |
389 | hci_le_create_connection_cancel(conn); | |
390 | } | |
93796fa6 CT |
391 | } else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) { |
392 | hci_reject_sco(conn); | |
fcd89c09 | 393 | } |
6ac59344 | 394 | break; |
769be974 | 395 | case BT_CONFIG: |
8e87d142 | 396 | case BT_CONNECTED: |
40051e46 MH |
397 | if (conn->type == AMP_LINK) { |
398 | hci_amp_disconn(conn); | |
399 | } else { | |
400 | __u8 reason = hci_proto_disconn_ind(conn); | |
401 | hci_disconnect(conn, reason); | |
402 | } | |
6ac59344 MH |
403 | break; |
404 | default: | |
1da177e4 | 405 | conn->state = BT_CLOSED; |
6ac59344 MH |
406 | break; |
407 | } | |
1da177e4 LT |
408 | } |
409 | ||
416dc94b | 410 | /* Enter sniff mode */ |
a74a84f6 | 411 | static void hci_conn_idle(struct work_struct *work) |
416dc94b | 412 | { |
a74a84f6 JH |
413 | struct hci_conn *conn = container_of(work, struct hci_conn, |
414 | idle_work.work); | |
416dc94b GP |
415 | struct hci_dev *hdev = conn->hdev; |
416 | ||
38b3fef1 | 417 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
416dc94b | 418 | |
416dc94b GP |
419 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) |
420 | return; | |
421 | ||
422 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
423 | return; | |
424 | ||
425 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
426 | struct hci_cp_sniff_subrate cp; | |
427 | cp.handle = cpu_to_le16(conn->handle); | |
dcf4adbf JP |
428 | cp.max_latency = cpu_to_le16(0); |
429 | cp.min_remote_timeout = cpu_to_le16(0); | |
430 | cp.min_local_timeout = cpu_to_le16(0); | |
416dc94b GP |
431 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); |
432 | } | |
433 | ||
51a8efd7 | 434 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
416dc94b GP |
435 | struct hci_cp_sniff_mode cp; |
436 | cp.handle = cpu_to_le16(conn->handle); | |
437 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
438 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
dcf4adbf JP |
439 | cp.attempt = cpu_to_le16(4); |
440 | cp.timeout = cpu_to_le16(1); | |
416dc94b GP |
441 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); |
442 | } | |
443 | } | |
444 | ||
7bc18d9d | 445 | static void hci_conn_auto_accept(struct work_struct *work) |
9f61656a | 446 | { |
7bc18d9d JH |
447 | struct hci_conn *conn = container_of(work, struct hci_conn, |
448 | auto_accept_work.work); | |
9f61656a | 449 | |
7bc18d9d | 450 | hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), |
5974e4c4 | 451 | &conn->dst); |
9f61656a JH |
452 | } |
453 | ||
9489eca4 JH |
454 | static void le_conn_timeout(struct work_struct *work) |
455 | { | |
456 | struct hci_conn *conn = container_of(work, struct hci_conn, | |
457 | le_conn_timeout.work); | |
3c857757 | 458 | struct hci_dev *hdev = conn->hdev; |
9489eca4 JH |
459 | |
460 | BT_DBG(""); | |
461 | ||
3c857757 JH |
462 | /* We could end up here due to having done directed advertising, |
463 | * so clean up the state if necessary. This should however only | |
464 | * happen with broken hardware or if low duty cycle was used | |
465 | * (which doesn't have a timeout of its own). | |
466 | */ | |
0b1db38c | 467 | if (conn->role == HCI_ROLE_SLAVE) { |
3c857757 JH |
468 | u8 enable = 0x00; |
469 | hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), | |
470 | &enable); | |
471 | hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT); | |
472 | return; | |
473 | } | |
474 | ||
9489eca4 JH |
475 | hci_le_create_connection_cancel(conn); |
476 | } | |
477 | ||
a5c4e309 JH |
478 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst, |
479 | u8 role) | |
1da177e4 LT |
480 | { |
481 | struct hci_conn *conn; | |
482 | ||
6ed93dc6 | 483 | BT_DBG("%s dst %pMR", hdev->name, dst); |
1da177e4 | 484 | |
27f70f3e | 485 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
04837f64 | 486 | if (!conn) |
1da177e4 | 487 | return NULL; |
1da177e4 LT |
488 | |
489 | bacpy(&conn->dst, dst); | |
662e8820 | 490 | bacpy(&conn->src, &hdev->bdaddr); |
a8746417 MH |
491 | conn->hdev = hdev; |
492 | conn->type = type; | |
a5c4e309 | 493 | conn->role = role; |
a8746417 MH |
494 | conn->mode = HCI_CM_ACTIVE; |
495 | conn->state = BT_OPEN; | |
93f19c9f | 496 | conn->auth_type = HCI_AT_GENERAL_BONDING; |
17fa4b9d | 497 | conn->io_capability = hdev->io_capability; |
a9583556 | 498 | conn->remote_auth = 0xff; |
13d39315 | 499 | conn->key_type = 0xff; |
ebf86aa3 | 500 | conn->rssi = HCI_RSSI_INVALID; |
5a134fae | 501 | conn->tx_power = HCI_TX_POWER_INVALID; |
d0455ed9 | 502 | conn->max_tx_power = HCI_TX_POWER_INVALID; |
1da177e4 | 503 | |
58a681ef | 504 | set_bit(HCI_CONN_POWER_SAVE, &conn->flags); |
052b30b0 | 505 | conn->disc_timeout = HCI_DISCONN_TIMEOUT; |
04837f64 | 506 | |
a5c4e309 JH |
507 | if (conn->role == HCI_ROLE_MASTER) |
508 | conn->out = true; | |
509 | ||
a8746417 MH |
510 | switch (type) { |
511 | case ACL_LINK: | |
512 | conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; | |
513 | break; | |
9c84d1da JH |
514 | case LE_LINK: |
515 | /* conn->src should reflect the local identity address */ | |
516 | hci_copy_identity_address(hdev, &conn->src, &conn->src_type); | |
517 | break; | |
a8746417 MH |
518 | case SCO_LINK: |
519 | if (lmp_esco_capable(hdev)) | |
efc7688b MH |
520 | conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | |
521 | (hdev->esco_type & EDR_ESCO_MASK); | |
a8746417 MH |
522 | else |
523 | conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; | |
524 | break; | |
525 | case ESCO_LINK: | |
efc7688b | 526 | conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; |
a8746417 MH |
527 | break; |
528 | } | |
529 | ||
1da177e4 | 530 | skb_queue_head_init(&conn->data_q); |
04837f64 | 531 | |
70c1f20b | 532 | INIT_LIST_HEAD(&conn->chan_list); |
73d80deb | 533 | |
19c40e3b | 534 | INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout); |
7bc18d9d | 535 | INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept); |
a74a84f6 | 536 | INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle); |
9489eca4 | 537 | INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout); |
1da177e4 LT |
538 | |
539 | atomic_set(&conn->refcnt, 0); | |
540 | ||
541 | hci_dev_hold(hdev); | |
542 | ||
1da177e4 | 543 | hci_conn_hash_add(hdev, conn); |
3c54711c | 544 | if (hdev->notify) |
1da177e4 LT |
545 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); |
546 | ||
a67e899c MH |
547 | hci_conn_init_sysfs(conn); |
548 | ||
1da177e4 LT |
549 | return conn; |
550 | } | |
551 | ||
552 | int hci_conn_del(struct hci_conn *conn) | |
553 | { | |
554 | struct hci_dev *hdev = conn->hdev; | |
555 | ||
38b3fef1 | 556 | BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle); |
1da177e4 | 557 | |
19c40e3b | 558 | cancel_delayed_work_sync(&conn->disc_work); |
7bc18d9d | 559 | cancel_delayed_work_sync(&conn->auto_accept_work); |
a74a84f6 | 560 | cancel_delayed_work_sync(&conn->idle_work); |
9f61656a | 561 | |
5b7f9909 | 562 | if (conn->type == ACL_LINK) { |
1da177e4 LT |
563 | struct hci_conn *sco = conn->link; |
564 | if (sco) | |
565 | sco->link = NULL; | |
566 | ||
567 | /* Unacked frames */ | |
568 | hdev->acl_cnt += conn->sent; | |
6ed58ec5 | 569 | } else if (conn->type == LE_LINK) { |
980ffc0a | 570 | cancel_delayed_work(&conn->le_conn_timeout); |
9489eca4 | 571 | |
6ed58ec5 VT |
572 | if (hdev->le_pkts) |
573 | hdev->le_cnt += conn->sent; | |
574 | else | |
575 | hdev->acl_cnt += conn->sent; | |
5b7f9909 MH |
576 | } else { |
577 | struct hci_conn *acl = conn->link; | |
578 | if (acl) { | |
579 | acl->link = NULL; | |
76a68ba0 | 580 | hci_conn_drop(acl); |
5b7f9909 | 581 | } |
1da177e4 LT |
582 | } |
583 | ||
2c33c06a | 584 | hci_chan_list_flush(conn); |
73d80deb | 585 | |
9740e49d AE |
586 | if (conn->amp_mgr) |
587 | amp_mgr_put(conn->amp_mgr); | |
588 | ||
1da177e4 | 589 | hci_conn_hash_del(hdev, conn); |
3c54711c | 590 | if (hdev->notify) |
1da177e4 | 591 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); |
7d0db0a3 | 592 | |
1da177e4 | 593 | skb_queue_purge(&conn->data_q); |
1da177e4 | 594 | |
fc225c3f | 595 | hci_conn_del_sysfs(conn); |
2ae9a6be | 596 | |
23b9ceb7 MH |
597 | debugfs_remove_recursive(conn->debugfs); |
598 | ||
89cbb063 AA |
599 | if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags)) |
600 | hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type); | |
601 | ||
384943ec MH |
602 | hci_dev_put(hdev); |
603 | ||
8d12356f | 604 | hci_conn_put(conn); |
163f4dab | 605 | |
1da177e4 LT |
606 | return 0; |
607 | } | |
608 | ||
609 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
610 | { | |
611 | int use_src = bacmp(src, BDADDR_ANY); | |
8035ded4 | 612 | struct hci_dev *hdev = NULL, *d; |
1da177e4 | 613 | |
6ed93dc6 | 614 | BT_DBG("%pMR -> %pMR", src, dst); |
1da177e4 | 615 | |
f20d09d5 | 616 | read_lock(&hci_dev_list_lock); |
1da177e4 | 617 | |
8035ded4 | 618 | list_for_each_entry(d, &hci_dev_list, list) { |
8fc9ced3 | 619 | if (!test_bit(HCI_UP, &d->flags) || |
d7a5a11d | 620 | hci_dev_test_flag(d, HCI_USER_CHANNEL) || |
d300fa9b | 621 | d->dev_type != HCI_BREDR) |
1da177e4 LT |
622 | continue; |
623 | ||
8e87d142 | 624 | /* Simple routing: |
1da177e4 LT |
625 | * No source address - find interface with bdaddr != dst |
626 | * Source address - find interface with bdaddr == src | |
627 | */ | |
628 | ||
629 | if (use_src) { | |
630 | if (!bacmp(&d->bdaddr, src)) { | |
631 | hdev = d; break; | |
632 | } | |
633 | } else { | |
634 | if (bacmp(&d->bdaddr, dst)) { | |
635 | hdev = d; break; | |
636 | } | |
637 | } | |
638 | } | |
639 | ||
640 | if (hdev) | |
641 | hdev = hci_dev_hold(hdev); | |
642 | ||
f20d09d5 | 643 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
644 | return hdev; |
645 | } | |
646 | EXPORT_SYMBOL(hci_get_route); | |
647 | ||
9bb3c01f | 648 | /* This function requires the caller holds hdev->lock */ |
06c053fb | 649 | void hci_le_conn_failed(struct hci_conn *conn, u8 status) |
9bb3c01f AG |
650 | { |
651 | struct hci_dev *hdev = conn->hdev; | |
f161dd41 JH |
652 | struct hci_conn_params *params; |
653 | ||
654 | params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst, | |
655 | conn->dst_type); | |
656 | if (params && params->conn) { | |
657 | hci_conn_drop(params->conn); | |
f8aaf9b6 | 658 | hci_conn_put(params->conn); |
f161dd41 JH |
659 | params->conn = NULL; |
660 | } | |
9bb3c01f AG |
661 | |
662 | conn->state = BT_CLOSED; | |
663 | ||
664 | mgmt_connect_failed(hdev, &conn->dst, conn->type, conn->dst_type, | |
665 | status); | |
666 | ||
539c496d | 667 | hci_connect_cfm(conn, status); |
9bb3c01f AG |
668 | |
669 | hci_conn_del(conn); | |
a4790dbd AG |
670 | |
671 | /* Since we may have temporarily stopped the background scanning in | |
672 | * favor of connection establishment, we should restart it. | |
673 | */ | |
674 | hci_update_background_scan(hdev); | |
3c857757 JH |
675 | |
676 | /* Re-enable advertising in case this was a failed connection | |
677 | * attempt as a peripheral. | |
678 | */ | |
679 | mgmt_reenable_advertising(hdev); | |
9bb3c01f AG |
680 | } |
681 | ||
1904a853 | 682 | static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode) |
1d399ae5 AG |
683 | { |
684 | struct hci_conn *conn; | |
685 | ||
28a667c9 JP |
686 | hci_dev_lock(hdev); |
687 | ||
688 | conn = hci_lookup_le_connect(hdev); | |
689 | ||
690 | if (!status) { | |
691 | hci_connect_le_scan_cleanup(conn); | |
692 | goto done; | |
693 | } | |
1d399ae5 AG |
694 | |
695 | BT_ERR("HCI request failed to create LE connection: status 0x%2.2x", | |
696 | status); | |
697 | ||
1d399ae5 AG |
698 | if (!conn) |
699 | goto done; | |
700 | ||
06c053fb | 701 | hci_le_conn_failed(conn, status); |
1d399ae5 AG |
702 | |
703 | done: | |
704 | hci_dev_unlock(hdev); | |
705 | } | |
706 | ||
2acf3d90 AG |
707 | static void hci_req_add_le_create_conn(struct hci_request *req, |
708 | struct hci_conn *conn) | |
709 | { | |
710 | struct hci_cp_le_create_conn cp; | |
711 | struct hci_dev *hdev = conn->hdev; | |
712 | u8 own_addr_type; | |
713 | ||
714 | memset(&cp, 0, sizeof(cp)); | |
715 | ||
716 | /* Update random address, but set require_privacy to false so | |
9437d2ed | 717 | * that we never connect with an non-resolvable address. |
2acf3d90 AG |
718 | */ |
719 | if (hci_update_random_address(req, false, &own_addr_type)) | |
720 | return; | |
721 | ||
2acf3d90 AG |
722 | cp.scan_interval = cpu_to_le16(hdev->le_scan_interval); |
723 | cp.scan_window = cpu_to_le16(hdev->le_scan_window); | |
724 | bacpy(&cp.peer_addr, &conn->dst); | |
725 | cp.peer_addr_type = conn->dst_type; | |
726 | cp.own_address_type = own_addr_type; | |
727 | cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval); | |
728 | cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval); | |
037fc415 MH |
729 | cp.conn_latency = cpu_to_le16(conn->le_conn_latency); |
730 | cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout); | |
dcf4adbf JP |
731 | cp.min_ce_len = cpu_to_le16(0x0000); |
732 | cp.max_ce_len = cpu_to_le16(0x0000); | |
2acf3d90 AG |
733 | |
734 | hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); | |
b46e0030 JH |
735 | |
736 | conn->state = BT_CONNECT; | |
28a667c9 | 737 | clear_bit(HCI_CONN_SCANNING, &conn->flags); |
2acf3d90 AG |
738 | } |
739 | ||
3c857757 JH |
740 | static void hci_req_directed_advertising(struct hci_request *req, |
741 | struct hci_conn *conn) | |
742 | { | |
743 | struct hci_dev *hdev = req->hdev; | |
744 | struct hci_cp_le_set_adv_param cp; | |
745 | u8 own_addr_type; | |
746 | u8 enable; | |
747 | ||
5ce194c4 | 748 | /* Clear the HCI_LE_ADV bit temporarily so that the |
3c857757 JH |
749 | * hci_update_random_address knows that it's safe to go ahead |
750 | * and write a new random address. The flag will be set back on | |
751 | * as soon as the SET_ADV_ENABLE HCI command completes. | |
752 | */ | |
a358dc11 | 753 | hci_dev_clear_flag(hdev, HCI_LE_ADV); |
3c857757 JH |
754 | |
755 | /* Set require_privacy to false so that the remote device has a | |
756 | * chance of identifying us. | |
757 | */ | |
758 | if (hci_update_random_address(req, false, &own_addr_type) < 0) | |
759 | return; | |
760 | ||
761 | memset(&cp, 0, sizeof(cp)); | |
762 | cp.type = LE_ADV_DIRECT_IND; | |
763 | cp.own_address_type = own_addr_type; | |
764 | cp.direct_addr_type = conn->dst_type; | |
765 | bacpy(&cp.direct_addr, &conn->dst); | |
766 | cp.channel_map = hdev->le_adv_channel_map; | |
767 | ||
768 | hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp); | |
769 | ||
770 | enable = 0x01; | |
771 | hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable); | |
772 | ||
773 | conn->state = BT_CONNECT; | |
774 | } | |
775 | ||
04a6c589 | 776 | struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, |
cdd6275e | 777 | u8 dst_type, u8 sec_level, u16 conn_timeout, |
e804d25d | 778 | u8 role) |
1da177e4 | 779 | { |
4292f1f3 | 780 | struct hci_conn_params *params; |
28a667c9 | 781 | struct hci_conn *conn, *conn_unfinished; |
1ebfcc1f | 782 | struct smp_irk *irk; |
2acf3d90 | 783 | struct hci_request req; |
1d399ae5 | 784 | int err; |
1da177e4 | 785 | |
152d386e | 786 | /* Let's make sure that le is enabled.*/ |
d7a5a11d | 787 | if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { |
152d386e LR |
788 | if (lmp_le_capable(hdev)) |
789 | return ERR_PTR(-ECONNREFUSED); | |
790 | ||
791 | return ERR_PTR(-EOPNOTSUPP); | |
792 | } | |
793 | ||
620ad521 AG |
794 | /* Some devices send ATT messages as soon as the physical link is |
795 | * established. To be able to handle these ATT messages, the user- | |
796 | * space first establishes the connection and then starts the pairing | |
797 | * process. | |
798 | * | |
799 | * So if a hci_conn object already exists for the following connection | |
800 | * attempt, we simply update pending_sec_level and auth_type fields | |
801 | * and return the object found. | |
802 | */ | |
f1e5d547 | 803 | conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); |
28a667c9 | 804 | conn_unfinished = NULL; |
620ad521 | 805 | if (conn) { |
28a667c9 JP |
806 | if (conn->state == BT_CONNECT && |
807 | test_bit(HCI_CONN_SCANNING, &conn->flags)) { | |
808 | BT_DBG("will continue unfinished conn %pMR", dst); | |
809 | conn_unfinished = conn; | |
810 | } else { | |
811 | if (conn->pending_sec_level < sec_level) | |
812 | conn->pending_sec_level = sec_level; | |
813 | goto done; | |
814 | } | |
620ad521 | 815 | } |
dfc94dbd | 816 | |
620ad521 AG |
817 | /* Since the controller supports only one LE connection attempt at a |
818 | * time, we return -EBUSY if there is any connection attempt running. | |
819 | */ | |
e7d9ab73 | 820 | if (hci_lookup_le_connect(hdev)) |
620ad521 | 821 | return ERR_PTR(-EBUSY); |
46a190cb | 822 | |
edb4b466 MH |
823 | /* When given an identity address with existing identity |
824 | * resolving key, the connection needs to be established | |
825 | * to a resolvable random address. | |
826 | * | |
edb4b466 MH |
827 | * Storing the resolvable random address is required here |
828 | * to handle connection failures. The address will later | |
829 | * be resolved back into the original identity address | |
830 | * from the connect request. | |
831 | */ | |
1ebfcc1f JH |
832 | irk = hci_find_irk_by_addr(hdev, dst, dst_type); |
833 | if (irk && bacmp(&irk->rpa, BDADDR_ANY)) { | |
834 | dst = &irk->rpa; | |
835 | dst_type = ADDR_LE_DEV_RANDOM; | |
836 | } | |
837 | ||
28a667c9 JP |
838 | if (conn_unfinished) { |
839 | conn = conn_unfinished; | |
840 | bacpy(&conn->dst, dst); | |
841 | } else { | |
842 | conn = hci_conn_add(hdev, LE_LINK, dst, role); | |
843 | } | |
844 | ||
620ad521 AG |
845 | if (!conn) |
846 | return ERR_PTR(-ENOMEM); | |
9f0caeb1 | 847 | |
1ebfcc1f | 848 | conn->dst_type = dst_type; |
620ad521 | 849 | conn->sec_level = BT_SECURITY_LOW; |
09ae260b | 850 | conn->conn_timeout = conn_timeout; |
4292f1f3 | 851 | |
28a667c9 JP |
852 | if (!conn_unfinished) |
853 | conn->pending_sec_level = sec_level; | |
854 | ||
3c857757 JH |
855 | hci_req_init(&req, hdev); |
856 | ||
376f54c1 JH |
857 | /* Disable advertising if we're active. For master role |
858 | * connections most controllers will refuse to connect if | |
859 | * advertising is enabled, and for slave role connections we | |
860 | * anyway have to disable it in order to start directed | |
861 | * advertising. | |
862 | */ | |
d7a5a11d | 863 | if (hci_dev_test_flag(hdev, HCI_LE_ADV)) { |
376f54c1 JH |
864 | u8 enable = 0x00; |
865 | hci_req_add(&req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), | |
866 | &enable); | |
867 | } | |
868 | ||
cdd6275e | 869 | /* If requested to connect as slave use directed advertising */ |
e804d25d | 870 | if (conn->role == HCI_ROLE_SLAVE) { |
e8bb6b97 JH |
871 | /* If we're active scanning most controllers are unable |
872 | * to initiate advertising. Simply reject the attempt. | |
873 | */ | |
d7a5a11d | 874 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN) && |
e8bb6b97 JH |
875 | hdev->le_scan_type == LE_SCAN_ACTIVE) { |
876 | skb_queue_purge(&req.cmd_q); | |
877 | hci_conn_del(conn); | |
878 | return ERR_PTR(-EBUSY); | |
879 | } | |
880 | ||
3c857757 JH |
881 | hci_req_directed_advertising(&req, conn); |
882 | goto create_conn; | |
883 | } | |
884 | ||
4292f1f3 AG |
885 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); |
886 | if (params) { | |
887 | conn->le_conn_min_interval = params->conn_min_interval; | |
888 | conn->le_conn_max_interval = params->conn_max_interval; | |
037fc415 MH |
889 | conn->le_conn_latency = params->conn_latency; |
890 | conn->le_supv_timeout = params->supervision_timeout; | |
4292f1f3 AG |
891 | } else { |
892 | conn->le_conn_min_interval = hdev->le_conn_min_interval; | |
893 | conn->le_conn_max_interval = hdev->le_conn_max_interval; | |
04fb7d90 MH |
894 | conn->le_conn_latency = hdev->le_conn_latency; |
895 | conn->le_supv_timeout = hdev->le_supv_timeout; | |
4292f1f3 | 896 | } |
eda42b50 | 897 | |
2acf3d90 | 898 | /* If controller is scanning, we stop it since some controllers are |
81ad6fd9 JH |
899 | * not able to scan and connect at the same time. Also set the |
900 | * HCI_LE_SCAN_INTERRUPTED flag so that the command complete | |
901 | * handler for scan disabling knows to set the correct discovery | |
902 | * state. | |
2acf3d90 | 903 | */ |
d7a5a11d | 904 | if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) { |
2acf3d90 | 905 | hci_req_add_le_scan_disable(&req); |
a1536da2 | 906 | hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED); |
2acf3d90 AG |
907 | } |
908 | ||
81ad6fd9 JH |
909 | hci_req_add_le_create_conn(&req, conn); |
910 | ||
3c857757 | 911 | create_conn: |
81ad6fd9 | 912 | err = hci_req_run(&req, create_le_conn_complete); |
2acf3d90 AG |
913 | if (err) { |
914 | hci_conn_del(conn); | |
620ad521 | 915 | return ERR_PTR(err); |
2acf3d90 | 916 | } |
fcd89c09 | 917 | |
620ad521 | 918 | done: |
28a667c9 JP |
919 | /* If this is continuation of connect started by hci_connect_le_scan, |
920 | * it already called hci_conn_hold and calling it again would mess the | |
921 | * counter. | |
922 | */ | |
923 | if (!conn_unfinished) | |
924 | hci_conn_hold(conn); | |
925 | ||
f1e5d547 | 926 | return conn; |
d04aef4c | 927 | } |
fcd89c09 | 928 | |
f75113a2 JP |
929 | static void hci_connect_le_scan_complete(struct hci_dev *hdev, u8 status, |
930 | u16 opcode) | |
931 | { | |
932 | struct hci_conn *conn; | |
933 | ||
934 | if (!status) | |
935 | return; | |
936 | ||
937 | BT_ERR("Failed to add device to auto conn whitelist: status 0x%2.2x", | |
938 | status); | |
939 | ||
940 | hci_dev_lock(hdev); | |
941 | ||
942 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
943 | if (conn) | |
944 | hci_le_conn_failed(conn, status); | |
945 | ||
946 | hci_dev_unlock(hdev); | |
947 | } | |
948 | ||
949 | static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type) | |
950 | { | |
951 | struct hci_conn *conn; | |
952 | ||
953 | conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, addr); | |
954 | if (!conn) | |
955 | return false; | |
956 | ||
957 | if (conn->dst_type != type) | |
958 | return false; | |
959 | ||
960 | if (conn->state != BT_CONNECTED) | |
961 | return false; | |
962 | ||
963 | return true; | |
964 | } | |
965 | ||
966 | /* This function requires the caller holds hdev->lock */ | |
967 | static int hci_explicit_conn_params_set(struct hci_request *req, | |
968 | bdaddr_t *addr, u8 addr_type) | |
969 | { | |
970 | struct hci_dev *hdev = req->hdev; | |
971 | struct hci_conn_params *params; | |
972 | ||
973 | if (is_connected(hdev, addr, addr_type)) | |
974 | return -EISCONN; | |
975 | ||
976 | params = hci_conn_params_add(hdev, addr, addr_type); | |
977 | if (!params) | |
978 | return -EIO; | |
979 | ||
980 | /* If we created new params, or existing params were marked as disabled, | |
981 | * mark them to be used just once to connect. | |
982 | */ | |
983 | if (params->auto_connect == HCI_AUTO_CONN_DISABLED) { | |
984 | params->auto_connect = HCI_AUTO_CONN_EXPLICIT; | |
985 | list_del_init(¶ms->action); | |
986 | list_add(¶ms->action, &hdev->pend_le_conns); | |
987 | } | |
988 | ||
989 | params->explicit_connect = true; | |
990 | __hci_update_background_scan(req); | |
991 | ||
992 | BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type, | |
993 | params->auto_connect); | |
994 | ||
995 | return 0; | |
996 | } | |
997 | ||
998 | /* This function requires the caller holds hdev->lock */ | |
999 | struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst, | |
1000 | u8 dst_type, u8 sec_level, | |
1001 | u16 conn_timeout, u8 role) | |
1002 | { | |
1003 | struct hci_conn *conn; | |
1004 | struct hci_request req; | |
1005 | int err; | |
1006 | ||
1007 | /* Let's make sure that le is enabled.*/ | |
1008 | if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { | |
1009 | if (lmp_le_capable(hdev)) | |
1010 | return ERR_PTR(-ECONNREFUSED); | |
1011 | ||
1012 | return ERR_PTR(-EOPNOTSUPP); | |
1013 | } | |
1014 | ||
1015 | /* Some devices send ATT messages as soon as the physical link is | |
1016 | * established. To be able to handle these ATT messages, the user- | |
1017 | * space first establishes the connection and then starts the pairing | |
1018 | * process. | |
1019 | * | |
1020 | * So if a hci_conn object already exists for the following connection | |
1021 | * attempt, we simply update pending_sec_level and auth_type fields | |
1022 | * and return the object found. | |
1023 | */ | |
1024 | conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); | |
1025 | if (conn) { | |
1026 | if (conn->pending_sec_level < sec_level) | |
1027 | conn->pending_sec_level = sec_level; | |
1028 | goto done; | |
1029 | } | |
1030 | ||
1031 | BT_DBG("requesting refresh of dst_addr"); | |
1032 | ||
1033 | conn = hci_conn_add(hdev, LE_LINK, dst, role); | |
1034 | if (!conn) | |
1035 | return ERR_PTR(-ENOMEM); | |
1036 | ||
1037 | hci_req_init(&req, hdev); | |
1038 | ||
1039 | if (hci_explicit_conn_params_set(&req, dst, dst_type) < 0) | |
1040 | return ERR_PTR(-EBUSY); | |
1041 | ||
1042 | conn->state = BT_CONNECT; | |
1043 | set_bit(HCI_CONN_SCANNING, &conn->flags); | |
1044 | ||
1045 | err = hci_req_run(&req, hci_connect_le_scan_complete); | |
1046 | if (err && err != -ENODATA) { | |
1047 | hci_conn_del(conn); | |
1048 | return ERR_PTR(err); | |
1049 | } | |
1050 | ||
1051 | conn->dst_type = dst_type; | |
1052 | conn->sec_level = BT_SECURITY_LOW; | |
1053 | conn->pending_sec_level = sec_level; | |
1054 | conn->conn_timeout = conn_timeout; | |
1055 | ||
1056 | done: | |
1057 | hci_conn_hold(conn); | |
1058 | return conn; | |
1059 | } | |
1060 | ||
04a6c589 AG |
1061 | struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst, |
1062 | u8 sec_level, u8 auth_type) | |
1da177e4 LT |
1063 | { |
1064 | struct hci_conn *acl; | |
fcd89c09 | 1065 | |
d7a5a11d | 1066 | if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) { |
c411110e LR |
1067 | if (lmp_bredr_capable(hdev)) |
1068 | return ERR_PTR(-ECONNREFUSED); | |
1069 | ||
beb19e4c | 1070 | return ERR_PTR(-EOPNOTSUPP); |
c411110e | 1071 | } |
56f87901 | 1072 | |
70f23020 AE |
1073 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
1074 | if (!acl) { | |
a5c4e309 | 1075 | acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER); |
70f23020 | 1076 | if (!acl) |
48c7aba9 | 1077 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
1078 | } |
1079 | ||
1080 | hci_conn_hold(acl); | |
1081 | ||
09ab6f4c | 1082 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
1083 | acl->sec_level = BT_SECURITY_LOW; |
1084 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 1085 | acl->auth_type = auth_type; |
1aef8669 | 1086 | hci_acl_create_connection(acl); |
09ab6f4c | 1087 | } |
1da177e4 | 1088 | |
db474275 VCG |
1089 | return acl; |
1090 | } | |
1091 | ||
10c62ddc FD |
1092 | struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst, |
1093 | __u16 setting) | |
db474275 VCG |
1094 | { |
1095 | struct hci_conn *acl; | |
1096 | struct hci_conn *sco; | |
1097 | ||
e660ed6c | 1098 | acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
db474275 | 1099 | if (IS_ERR(acl)) |
5b7f9909 | 1100 | return acl; |
1da177e4 | 1101 | |
70f23020 AE |
1102 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
1103 | if (!sco) { | |
a5c4e309 | 1104 | sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER); |
70f23020 | 1105 | if (!sco) { |
76a68ba0 | 1106 | hci_conn_drop(acl); |
48c7aba9 | 1107 | return ERR_PTR(-ENOMEM); |
1da177e4 | 1108 | } |
5b7f9909 | 1109 | } |
1da177e4 | 1110 | |
5b7f9909 MH |
1111 | acl->link = sco; |
1112 | sco->link = acl; | |
1da177e4 | 1113 | |
5b7f9909 | 1114 | hci_conn_hold(sco); |
1da177e4 | 1115 | |
10c62ddc FD |
1116 | sco->setting = setting; |
1117 | ||
5b7f9909 | 1118 | if (acl->state == BT_CONNECTED && |
5974e4c4 | 1119 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
58a681ef | 1120 | set_bit(HCI_CONN_POWER_SAVE, &acl->flags); |
14b12d0b | 1121 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 1122 | |
51a8efd7 | 1123 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { |
e73439d8 | 1124 | /* defer SCO setup until mode change completed */ |
51a8efd7 | 1125 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); |
e73439d8 MH |
1126 | return sco; |
1127 | } | |
1128 | ||
1129 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 1130 | } |
5b7f9909 MH |
1131 | |
1132 | return sco; | |
1da177e4 | 1133 | } |
1da177e4 | 1134 | |
e7c29cb1 MH |
1135 | /* Check link security requirement */ |
1136 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
1137 | { | |
38b3fef1 | 1138 | BT_DBG("hcon %p", conn); |
e7c29cb1 | 1139 | |
40b552aa MH |
1140 | /* In Secure Connections Only mode, it is required that Secure |
1141 | * Connections is used and the link is encrypted with AES-CCM | |
1142 | * using a P-256 authenticated combination key. | |
1143 | */ | |
d7a5a11d | 1144 | if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) { |
40b552aa MH |
1145 | if (!hci_conn_sc_enabled(conn) || |
1146 | !test_bit(HCI_CONN_AES_CCM, &conn->flags) || | |
1147 | conn->key_type != HCI_LK_AUTH_COMBINATION_P256) | |
1148 | return 0; | |
1149 | } | |
1150 | ||
4dae2798 JH |
1151 | if (hci_conn_ssp_enabled(conn) && |
1152 | !test_bit(HCI_CONN_ENCRYPT, &conn->flags)) | |
e7c29cb1 MH |
1153 | return 0; |
1154 | ||
1155 | return 1; | |
1156 | } | |
e7c29cb1 | 1157 | |
1da177e4 | 1158 | /* Authenticate remote device */ |
0684e5f9 | 1159 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 | 1160 | { |
38b3fef1 | 1161 | BT_DBG("hcon %p", conn); |
1da177e4 | 1162 | |
765c2a96 JH |
1163 | if (conn->pending_sec_level > sec_level) |
1164 | sec_level = conn->pending_sec_level; | |
1165 | ||
96a31833 | 1166 | if (sec_level > conn->sec_level) |
765c2a96 | 1167 | conn->pending_sec_level = sec_level; |
4dae2798 | 1168 | else if (test_bit(HCI_CONN_AUTH, &conn->flags)) |
1da177e4 LT |
1169 | return 1; |
1170 | ||
65cf686e JH |
1171 | /* Make sure we preserve an existing MITM requirement*/ |
1172 | auth_type |= (conn->auth_type & 0x01); | |
1173 | ||
96a31833 MH |
1174 | conn->auth_type = auth_type; |
1175 | ||
51a8efd7 | 1176 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 1177 | struct hci_cp_auth_requested cp; |
b7d05bad | 1178 | |
aca3192c | 1179 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 1180 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
5974e4c4 | 1181 | sizeof(cp), &cp); |
09da1f34 JH |
1182 | |
1183 | /* If we're already encrypted set the REAUTH_PEND flag, | |
1184 | * otherwise set the ENCRYPT_PEND. | |
1185 | */ | |
4dae2798 | 1186 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) |
51a8efd7 | 1187 | set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); |
09da1f34 JH |
1188 | else |
1189 | set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); | |
1da177e4 | 1190 | } |
8c1b2355 | 1191 | |
1da177e4 LT |
1192 | return 0; |
1193 | } | |
1da177e4 | 1194 | |
13d39315 WR |
1195 | /* Encrypt the the link */ |
1196 | static void hci_conn_encrypt(struct hci_conn *conn) | |
1197 | { | |
38b3fef1 | 1198 | BT_DBG("hcon %p", conn); |
13d39315 | 1199 | |
51a8efd7 | 1200 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { |
13d39315 WR |
1201 | struct hci_cp_set_conn_encrypt cp; |
1202 | cp.handle = cpu_to_le16(conn->handle); | |
1203 | cp.encrypt = 0x01; | |
1204 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
5974e4c4 | 1205 | &cp); |
13d39315 WR |
1206 | } |
1207 | } | |
1208 | ||
8c1b2355 | 1209 | /* Enable security */ |
e7cafc45 JH |
1210 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type, |
1211 | bool initiator) | |
1da177e4 | 1212 | { |
38b3fef1 | 1213 | BT_DBG("hcon %p", conn); |
1da177e4 | 1214 | |
d8343f12 VCG |
1215 | if (conn->type == LE_LINK) |
1216 | return smp_conn_security(conn, sec_level); | |
1217 | ||
13d39315 | 1218 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
1219 | if (sec_level == BT_SECURITY_SDP) |
1220 | return 1; | |
1221 | ||
13d39315 WR |
1222 | /* For non 2.1 devices and low security level we don't need the link |
1223 | key. */ | |
aa64a8b5 | 1224 | if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) |
3fdca1e1 | 1225 | return 1; |
8c1b2355 | 1226 | |
13d39315 | 1227 | /* For other security levels we need the link key. */ |
4dae2798 | 1228 | if (!test_bit(HCI_CONN_AUTH, &conn->flags)) |
13d39315 WR |
1229 | goto auth; |
1230 | ||
7b5a9241 MH |
1231 | /* An authenticated FIPS approved combination key has sufficient |
1232 | * security for security level 4. */ | |
1233 | if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 && | |
1234 | sec_level == BT_SECURITY_FIPS) | |
1235 | goto encrypt; | |
1236 | ||
1237 | /* An authenticated combination key has sufficient security for | |
1238 | security level 3. */ | |
1239 | if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 || | |
1240 | conn->key_type == HCI_LK_AUTH_COMBINATION_P256) && | |
1241 | sec_level == BT_SECURITY_HIGH) | |
13d39315 WR |
1242 | goto encrypt; |
1243 | ||
1244 | /* An unauthenticated combination key has sufficient security for | |
1245 | security level 1 and 2. */ | |
66138ce8 MH |
1246 | if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 || |
1247 | conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) && | |
5974e4c4 | 1248 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW)) |
13d39315 WR |
1249 | goto encrypt; |
1250 | ||
1251 | /* A combination key has always sufficient security for the security | |
1252 | levels 1 or 2. High security level requires the combination key | |
1253 | is generated using maximum PIN code length (16). | |
1254 | For pre 2.1 units. */ | |
1255 | if (conn->key_type == HCI_LK_COMBINATION && | |
7b5a9241 MH |
1256 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW || |
1257 | conn->pin_length == 16)) | |
13d39315 WR |
1258 | goto encrypt; |
1259 | ||
1260 | auth: | |
51a8efd7 | 1261 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) |
1da177e4 LT |
1262 | return 0; |
1263 | ||
977f8fce JH |
1264 | if (initiator) |
1265 | set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); | |
1266 | ||
6fdf658c LAD |
1267 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
1268 | return 0; | |
13d39315 WR |
1269 | |
1270 | encrypt: | |
4dae2798 | 1271 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) |
13d39315 | 1272 | return 1; |
8c1b2355 | 1273 | |
13d39315 | 1274 | hci_conn_encrypt(conn); |
1da177e4 LT |
1275 | return 0; |
1276 | } | |
8c1b2355 | 1277 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 1278 | |
b3b1b061 WR |
1279 | /* Check secure link requirement */ |
1280 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
1281 | { | |
38b3fef1 | 1282 | BT_DBG("hcon %p", conn); |
b3b1b061 | 1283 | |
9cb2e030 MH |
1284 | /* Accept if non-secure or higher security level is required */ |
1285 | if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS) | |
1286 | return 1; | |
b3b1b061 | 1287 | |
9cb2e030 MH |
1288 | /* Accept if secure or higher security level is already present */ |
1289 | if (conn->sec_level == BT_SECURITY_HIGH || | |
1290 | conn->sec_level == BT_SECURITY_FIPS) | |
b3b1b061 WR |
1291 | return 1; |
1292 | ||
9cb2e030 MH |
1293 | /* Reject not secure link */ |
1294 | return 0; | |
b3b1b061 WR |
1295 | } |
1296 | EXPORT_SYMBOL(hci_conn_check_secure); | |
1297 | ||
1da177e4 | 1298 | /* Switch role */ |
8c1b2355 | 1299 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 | 1300 | { |
38b3fef1 | 1301 | BT_DBG("hcon %p", conn); |
1da177e4 | 1302 | |
40bef302 | 1303 | if (role == conn->role) |
1da177e4 LT |
1304 | return 1; |
1305 | ||
51a8efd7 | 1306 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { |
1da177e4 LT |
1307 | struct hci_cp_switch_role cp; |
1308 | bacpy(&cp.bdaddr, &conn->dst); | |
1309 | cp.role = role; | |
a9de9248 | 1310 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 1311 | } |
8c1b2355 | 1312 | |
1da177e4 LT |
1313 | return 0; |
1314 | } | |
1315 | EXPORT_SYMBOL(hci_conn_switch_role); | |
1316 | ||
04837f64 | 1317 | /* Enter active mode */ |
14b12d0b | 1318 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
1319 | { |
1320 | struct hci_dev *hdev = conn->hdev; | |
1321 | ||
38b3fef1 | 1322 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
04837f64 | 1323 | |
14b12d0b JG |
1324 | if (conn->mode != HCI_CM_SNIFF) |
1325 | goto timer; | |
1326 | ||
58a681ef | 1327 | if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) |
04837f64 MH |
1328 | goto timer; |
1329 | ||
51a8efd7 | 1330 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
04837f64 | 1331 | struct hci_cp_exit_sniff_mode cp; |
aca3192c | 1332 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 1333 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
1334 | } |
1335 | ||
1336 | timer: | |
1337 | if (hdev->idle_timeout > 0) | |
a74a84f6 JH |
1338 | queue_delayed_work(hdev->workqueue, &conn->idle_work, |
1339 | msecs_to_jiffies(hdev->idle_timeout)); | |
04837f64 MH |
1340 | } |
1341 | ||
1da177e4 LT |
1342 | /* Drop all connection on the device */ |
1343 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
1344 | { | |
1345 | struct hci_conn_hash *h = &hdev->conn_hash; | |
3c4e0df0 | 1346 | struct hci_conn *c, *n; |
1da177e4 LT |
1347 | |
1348 | BT_DBG("hdev %s", hdev->name); | |
1349 | ||
3c4e0df0 | 1350 | list_for_each_entry_safe(c, n, &h->list, list) { |
1da177e4 LT |
1351 | c->state = BT_CLOSED; |
1352 | ||
3a6d576b | 1353 | hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); |
1da177e4 LT |
1354 | hci_conn_del(c); |
1355 | } | |
1356 | } | |
1357 | ||
a9de9248 MH |
1358 | /* Check pending connect attempts */ |
1359 | void hci_conn_check_pending(struct hci_dev *hdev) | |
1360 | { | |
1361 | struct hci_conn *conn; | |
1362 | ||
1363 | BT_DBG("hdev %s", hdev->name); | |
1364 | ||
1365 | hci_dev_lock(hdev); | |
1366 | ||
1367 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
1368 | if (conn) | |
1aef8669 | 1369 | hci_acl_create_connection(conn); |
a9de9248 MH |
1370 | |
1371 | hci_dev_unlock(hdev); | |
1372 | } | |
1373 | ||
4dae2798 JH |
1374 | static u32 get_link_mode(struct hci_conn *conn) |
1375 | { | |
1376 | u32 link_mode = 0; | |
1377 | ||
40bef302 | 1378 | if (conn->role == HCI_ROLE_MASTER) |
4dae2798 JH |
1379 | link_mode |= HCI_LM_MASTER; |
1380 | ||
1381 | if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) | |
1382 | link_mode |= HCI_LM_ENCRYPT; | |
1383 | ||
1384 | if (test_bit(HCI_CONN_AUTH, &conn->flags)) | |
1385 | link_mode |= HCI_LM_AUTH; | |
1386 | ||
1387 | if (test_bit(HCI_CONN_SECURE, &conn->flags)) | |
1388 | link_mode |= HCI_LM_SECURE; | |
1389 | ||
1390 | if (test_bit(HCI_CONN_FIPS, &conn->flags)) | |
1391 | link_mode |= HCI_LM_FIPS; | |
1392 | ||
1393 | return link_mode; | |
1394 | } | |
1395 | ||
1da177e4 LT |
1396 | int hci_get_conn_list(void __user *arg) |
1397 | { | |
fc5fef61 | 1398 | struct hci_conn *c; |
1da177e4 LT |
1399 | struct hci_conn_list_req req, *cl; |
1400 | struct hci_conn_info *ci; | |
1401 | struct hci_dev *hdev; | |
1da177e4 LT |
1402 | int n = 0, size, err; |
1403 | ||
1404 | if (copy_from_user(&req, arg, sizeof(req))) | |
1405 | return -EFAULT; | |
1406 | ||
1407 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
1408 | return -EINVAL; | |
1409 | ||
1410 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
1411 | ||
70f23020 AE |
1412 | cl = kmalloc(size, GFP_KERNEL); |
1413 | if (!cl) | |
1da177e4 LT |
1414 | return -ENOMEM; |
1415 | ||
70f23020 AE |
1416 | hdev = hci_dev_get(req.dev_id); |
1417 | if (!hdev) { | |
1da177e4 LT |
1418 | kfree(cl); |
1419 | return -ENODEV; | |
1420 | } | |
1421 | ||
1422 | ci = cl->conn_info; | |
1423 | ||
09fd0de5 | 1424 | hci_dev_lock(hdev); |
8035ded4 | 1425 | list_for_each_entry(c, &hdev->conn_hash.list, list) { |
1da177e4 LT |
1426 | bacpy(&(ci + n)->bdaddr, &c->dst); |
1427 | (ci + n)->handle = c->handle; | |
1428 | (ci + n)->type = c->type; | |
1429 | (ci + n)->out = c->out; | |
1430 | (ci + n)->state = c->state; | |
4dae2798 | 1431 | (ci + n)->link_mode = get_link_mode(c); |
1da177e4 LT |
1432 | if (++n >= req.conn_num) |
1433 | break; | |
1434 | } | |
09fd0de5 | 1435 | hci_dev_unlock(hdev); |
1da177e4 LT |
1436 | |
1437 | cl->dev_id = hdev->id; | |
1438 | cl->conn_num = n; | |
1439 | size = sizeof(req) + n * sizeof(*ci); | |
1440 | ||
1441 | hci_dev_put(hdev); | |
1442 | ||
1443 | err = copy_to_user(arg, cl, size); | |
1444 | kfree(cl); | |
1445 | ||
1446 | return err ? -EFAULT : 0; | |
1447 | } | |
1448 | ||
1449 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
1450 | { | |
1451 | struct hci_conn_info_req req; | |
1452 | struct hci_conn_info ci; | |
1453 | struct hci_conn *conn; | |
1454 | char __user *ptr = arg + sizeof(req); | |
1455 | ||
1456 | if (copy_from_user(&req, arg, sizeof(req))) | |
1457 | return -EFAULT; | |
1458 | ||
09fd0de5 | 1459 | hci_dev_lock(hdev); |
1da177e4 LT |
1460 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); |
1461 | if (conn) { | |
1462 | bacpy(&ci.bdaddr, &conn->dst); | |
1463 | ci.handle = conn->handle; | |
1464 | ci.type = conn->type; | |
1465 | ci.out = conn->out; | |
1466 | ci.state = conn->state; | |
4dae2798 | 1467 | ci.link_mode = get_link_mode(conn); |
1da177e4 | 1468 | } |
09fd0de5 | 1469 | hci_dev_unlock(hdev); |
1da177e4 LT |
1470 | |
1471 | if (!conn) | |
1472 | return -ENOENT; | |
1473 | ||
1474 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
1475 | } | |
40be492f MH |
1476 | |
1477 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
1478 | { | |
1479 | struct hci_auth_info_req req; | |
1480 | struct hci_conn *conn; | |
1481 | ||
1482 | if (copy_from_user(&req, arg, sizeof(req))) | |
1483 | return -EFAULT; | |
1484 | ||
09fd0de5 | 1485 | hci_dev_lock(hdev); |
40be492f MH |
1486 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); |
1487 | if (conn) | |
1488 | req.type = conn->auth_type; | |
09fd0de5 | 1489 | hci_dev_unlock(hdev); |
40be492f MH |
1490 | |
1491 | if (!conn) | |
1492 | return -ENOENT; | |
1493 | ||
1494 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
1495 | } | |
73d80deb LAD |
1496 | |
1497 | struct hci_chan *hci_chan_create(struct hci_conn *conn) | |
1498 | { | |
1499 | struct hci_dev *hdev = conn->hdev; | |
1500 | struct hci_chan *chan; | |
1501 | ||
38b3fef1 | 1502 | BT_DBG("%s hcon %p", hdev->name, conn); |
73d80deb | 1503 | |
f94b665d JH |
1504 | if (test_bit(HCI_CONN_DROP, &conn->flags)) { |
1505 | BT_DBG("Refusing to create new hci_chan"); | |
1506 | return NULL; | |
1507 | } | |
1508 | ||
27f70f3e | 1509 | chan = kzalloc(sizeof(*chan), GFP_KERNEL); |
73d80deb LAD |
1510 | if (!chan) |
1511 | return NULL; | |
1512 | ||
6c388d32 | 1513 | chan->conn = hci_conn_get(conn); |
73d80deb | 1514 | skb_queue_head_init(&chan->data_q); |
168df8e5 | 1515 | chan->state = BT_CONNECTED; |
73d80deb | 1516 | |
8192edef | 1517 | list_add_rcu(&chan->list, &conn->chan_list); |
73d80deb LAD |
1518 | |
1519 | return chan; | |
1520 | } | |
1521 | ||
9472007c | 1522 | void hci_chan_del(struct hci_chan *chan) |
73d80deb LAD |
1523 | { |
1524 | struct hci_conn *conn = chan->conn; | |
1525 | struct hci_dev *hdev = conn->hdev; | |
1526 | ||
38b3fef1 | 1527 | BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan); |
73d80deb | 1528 | |
8192edef GP |
1529 | list_del_rcu(&chan->list); |
1530 | ||
1531 | synchronize_rcu(); | |
73d80deb | 1532 | |
bcbb655a | 1533 | /* Prevent new hci_chan's to be created for this hci_conn */ |
f94b665d | 1534 | set_bit(HCI_CONN_DROP, &conn->flags); |
b3ff670a | 1535 | |
6c388d32 | 1536 | hci_conn_put(conn); |
e9b02748 | 1537 | |
73d80deb LAD |
1538 | skb_queue_purge(&chan->data_q); |
1539 | kfree(chan); | |
73d80deb LAD |
1540 | } |
1541 | ||
2c33c06a | 1542 | void hci_chan_list_flush(struct hci_conn *conn) |
73d80deb | 1543 | { |
2a5a5ec6 | 1544 | struct hci_chan *chan, *n; |
73d80deb | 1545 | |
38b3fef1 | 1546 | BT_DBG("hcon %p", conn); |
73d80deb | 1547 | |
2a5a5ec6 | 1548 | list_for_each_entry_safe(chan, n, &conn->chan_list, list) |
73d80deb LAD |
1549 | hci_chan_del(chan); |
1550 | } | |
42c4e53e AE |
1551 | |
1552 | static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon, | |
1553 | __u16 handle) | |
1554 | { | |
1555 | struct hci_chan *hchan; | |
1556 | ||
1557 | list_for_each_entry(hchan, &hcon->chan_list, list) { | |
1558 | if (hchan->handle == handle) | |
1559 | return hchan; | |
1560 | } | |
1561 | ||
1562 | return NULL; | |
1563 | } | |
1564 | ||
1565 | struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle) | |
1566 | { | |
1567 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1568 | struct hci_conn *hcon; | |
1569 | struct hci_chan *hchan = NULL; | |
1570 | ||
1571 | rcu_read_lock(); | |
1572 | ||
1573 | list_for_each_entry_rcu(hcon, &h->list, list) { | |
1574 | hchan = __hci_chan_lookup_handle(hcon, handle); | |
1575 | if (hchan) | |
1576 | break; | |
1577 | } | |
1578 | ||
1579 | rcu_read_unlock(); | |
1580 | ||
1581 | return hchan; | |
1582 | } |