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Commit | Line | Data |
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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> |
1da177e4 LT |
28 | |
29 | #include <net/bluetooth/bluetooth.h> | |
30 | #include <net/bluetooth/hci_core.h> | |
31 | ||
ac4b7236 | 32 | #include "smp.h" |
7024728e MH |
33 | #include "a2mp.h" |
34 | ||
2dea632f FD |
35 | struct sco_param { |
36 | u16 pkt_type; | |
37 | u16 max_latency; | |
38 | }; | |
39 | ||
40 | static const struct sco_param sco_param_cvsd[] = { | |
41 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a }, /* S3 */ | |
42 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007 }, /* S2 */ | |
43 | { EDR_ESCO_MASK | ESCO_EV3, 0x0007 }, /* S1 */ | |
44 | { EDR_ESCO_MASK | ESCO_HV3, 0xffff }, /* D1 */ | |
45 | { EDR_ESCO_MASK | ESCO_HV1, 0xffff }, /* D0 */ | |
46 | }; | |
47 | ||
48 | static const struct sco_param sco_param_wideband[] = { | |
49 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d }, /* T2 */ | |
50 | { EDR_ESCO_MASK | ESCO_EV3, 0x0008 }, /* T1 */ | |
51 | }; | |
52 | ||
1aef8669 | 53 | static void hci_le_create_connection_cancel(struct hci_conn *conn) |
fcd89c09 VT |
54 | { |
55 | hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); | |
56 | } | |
57 | ||
1aef8669 | 58 | static void hci_acl_create_connection(struct hci_conn *conn) |
1da177e4 LT |
59 | { |
60 | struct hci_dev *hdev = conn->hdev; | |
61 | struct inquiry_entry *ie; | |
62 | struct hci_cp_create_conn cp; | |
63 | ||
42d2d87c | 64 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
65 | |
66 | conn->state = BT_CONNECT; | |
a0c808b3 | 67 | conn->out = true; |
a8746417 | 68 | |
1da177e4 LT |
69 | conn->link_mode = HCI_LM_MASTER; |
70 | ||
4c67bc74 MH |
71 | conn->attempt++; |
72 | ||
e4e8e37c MH |
73 | conn->link_policy = hdev->link_policy; |
74 | ||
1da177e4 LT |
75 | memset(&cp, 0, sizeof(cp)); |
76 | bacpy(&cp.bdaddr, &conn->dst); | |
77 | cp.pscan_rep_mode = 0x02; | |
78 | ||
70f23020 AE |
79 | ie = hci_inquiry_cache_lookup(hdev, &conn->dst); |
80 | if (ie) { | |
41a96212 MH |
81 | if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { |
82 | cp.pscan_rep_mode = ie->data.pscan_rep_mode; | |
83 | cp.pscan_mode = ie->data.pscan_mode; | |
84 | cp.clock_offset = ie->data.clock_offset | | |
82781e63 | 85 | __constant_cpu_to_le16(0x8000); |
41a96212 MH |
86 | } |
87 | ||
1da177e4 | 88 | memcpy(conn->dev_class, ie->data.dev_class, 3); |
58a681ef JH |
89 | if (ie->data.ssp_mode > 0) |
90 | set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); | |
1da177e4 LT |
91 | } |
92 | ||
a8746417 | 93 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 94 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) |
b6a0dc82 | 95 | cp.role_switch = 0x01; |
1da177e4 | 96 | else |
b6a0dc82 | 97 | cp.role_switch = 0x00; |
4c67bc74 | 98 | |
a9de9248 | 99 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); |
1da177e4 LT |
100 | } |
101 | ||
1aef8669 | 102 | static void hci_acl_create_connection_cancel(struct hci_conn *conn) |
6ac59344 MH |
103 | { |
104 | struct hci_cp_create_conn_cancel cp; | |
105 | ||
38b3fef1 | 106 | BT_DBG("hcon %p", conn); |
6ac59344 | 107 | |
d095c1eb | 108 | if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2) |
6ac59344 MH |
109 | return; |
110 | ||
111 | bacpy(&cp.bdaddr, &conn->dst); | |
a9de9248 | 112 | hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); |
6ac59344 MH |
113 | } |
114 | ||
93796fa6 CT |
115 | static void hci_reject_sco(struct hci_conn *conn) |
116 | { | |
117 | struct hci_cp_reject_sync_conn_req cp; | |
118 | ||
119 | cp.reason = HCI_ERROR_REMOTE_USER_TERM; | |
120 | bacpy(&cp.bdaddr, &conn->dst); | |
121 | ||
122 | hci_send_cmd(conn->hdev, HCI_OP_REJECT_SYNC_CONN_REQ, sizeof(cp), &cp); | |
123 | } | |
124 | ||
bed71748 | 125 | void hci_disconnect(struct hci_conn *conn, __u8 reason) |
1da177e4 LT |
126 | { |
127 | struct hci_cp_disconnect cp; | |
128 | ||
38b3fef1 | 129 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
130 | |
131 | conn->state = BT_DISCONN; | |
132 | ||
aca3192c | 133 | cp.handle = cpu_to_le16(conn->handle); |
1da177e4 | 134 | cp.reason = reason; |
a9de9248 | 135 | hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); |
1da177e4 LT |
136 | } |
137 | ||
53502d69 AE |
138 | static void hci_amp_disconn(struct hci_conn *conn, __u8 reason) |
139 | { | |
140 | struct hci_cp_disconn_phy_link cp; | |
141 | ||
142 | BT_DBG("hcon %p", conn); | |
143 | ||
144 | conn->state = BT_DISCONN; | |
145 | ||
146 | cp.phy_handle = HCI_PHY_HANDLE(conn->handle); | |
147 | cp.reason = reason; | |
148 | hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK, | |
149 | sizeof(cp), &cp); | |
150 | } | |
151 | ||
57f5d0d1 | 152 | static void hci_add_sco(struct hci_conn *conn, __u16 handle) |
1da177e4 LT |
153 | { |
154 | struct hci_dev *hdev = conn->hdev; | |
155 | struct hci_cp_add_sco cp; | |
156 | ||
38b3fef1 | 157 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
158 | |
159 | conn->state = BT_CONNECT; | |
a0c808b3 | 160 | conn->out = true; |
1da177e4 | 161 | |
efc7688b MH |
162 | conn->attempt++; |
163 | ||
aca3192c | 164 | cp.handle = cpu_to_le16(handle); |
a8746417 | 165 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 166 | |
a9de9248 | 167 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); |
1da177e4 LT |
168 | } |
169 | ||
2dea632f | 170 | bool hci_setup_sync(struct hci_conn *conn, __u16 handle) |
b6a0dc82 MH |
171 | { |
172 | struct hci_dev *hdev = conn->hdev; | |
173 | struct hci_cp_setup_sync_conn cp; | |
2dea632f | 174 | const struct sco_param *param; |
b6a0dc82 | 175 | |
38b3fef1 | 176 | BT_DBG("hcon %p", conn); |
b6a0dc82 MH |
177 | |
178 | conn->state = BT_CONNECT; | |
a0c808b3 | 179 | conn->out = true; |
b6a0dc82 | 180 | |
efc7688b MH |
181 | conn->attempt++; |
182 | ||
b6a0dc82 | 183 | cp.handle = cpu_to_le16(handle); |
b6a0dc82 | 184 | |
82781e63 AE |
185 | cp.tx_bandwidth = __constant_cpu_to_le32(0x00001f40); |
186 | cp.rx_bandwidth = __constant_cpu_to_le32(0x00001f40); | |
10c62ddc FD |
187 | cp.voice_setting = cpu_to_le16(conn->setting); |
188 | ||
189 | switch (conn->setting & SCO_AIRMODE_MASK) { | |
190 | case SCO_AIRMODE_TRANSP: | |
2dea632f FD |
191 | if (conn->attempt > ARRAY_SIZE(sco_param_wideband)) |
192 | return false; | |
10c62ddc | 193 | cp.retrans_effort = 0x02; |
2dea632f | 194 | param = &sco_param_wideband[conn->attempt - 1]; |
10c62ddc FD |
195 | break; |
196 | case SCO_AIRMODE_CVSD: | |
2dea632f FD |
197 | if (conn->attempt > ARRAY_SIZE(sco_param_cvsd)) |
198 | return false; | |
199 | cp.retrans_effort = 0x01; | |
200 | param = &sco_param_cvsd[conn->attempt - 1]; | |
10c62ddc | 201 | break; |
2dea632f FD |
202 | default: |
203 | return false; | |
10c62ddc | 204 | } |
b6a0dc82 | 205 | |
2dea632f FD |
206 | cp.pkt_type = __cpu_to_le16(param->pkt_type); |
207 | cp.max_latency = __cpu_to_le16(param->max_latency); | |
208 | ||
209 | if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0) | |
210 | return false; | |
211 | ||
212 | return true; | |
b6a0dc82 MH |
213 | } |
214 | ||
2ce603eb | 215 | void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, |
5974e4c4 | 216 | u16 latency, u16 to_multiplier) |
2ce603eb CT |
217 | { |
218 | struct hci_cp_le_conn_update cp; | |
219 | struct hci_dev *hdev = conn->hdev; | |
220 | ||
221 | memset(&cp, 0, sizeof(cp)); | |
222 | ||
223 | cp.handle = cpu_to_le16(conn->handle); | |
224 | cp.conn_interval_min = cpu_to_le16(min); | |
225 | cp.conn_interval_max = cpu_to_le16(max); | |
226 | cp.conn_latency = cpu_to_le16(latency); | |
227 | cp.supervision_timeout = cpu_to_le16(to_multiplier); | |
82781e63 AE |
228 | cp.min_ce_len = __constant_cpu_to_le16(0x0001); |
229 | cp.max_ce_len = __constant_cpu_to_le16(0x0001); | |
2ce603eb CT |
230 | |
231 | hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); | |
232 | } | |
2ce603eb | 233 | |
a7a595f6 | 234 | void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8], |
5974e4c4 | 235 | __u8 ltk[16]) |
a7a595f6 VCG |
236 | { |
237 | struct hci_dev *hdev = conn->hdev; | |
238 | struct hci_cp_le_start_enc cp; | |
239 | ||
38b3fef1 | 240 | BT_DBG("hcon %p", conn); |
a7a595f6 VCG |
241 | |
242 | memset(&cp, 0, sizeof(cp)); | |
243 | ||
244 | cp.handle = cpu_to_le16(conn->handle); | |
245 | memcpy(cp.ltk, ltk, sizeof(cp.ltk)); | |
246 | cp.ediv = ediv; | |
51beabdf | 247 | memcpy(cp.rand, rand, sizeof(cp.rand)); |
a7a595f6 VCG |
248 | |
249 | hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); | |
250 | } | |
a7a595f6 | 251 | |
e73439d8 MH |
252 | /* Device _must_ be locked */ |
253 | void hci_sco_setup(struct hci_conn *conn, __u8 status) | |
254 | { | |
255 | struct hci_conn *sco = conn->link; | |
256 | ||
e73439d8 MH |
257 | if (!sco) |
258 | return; | |
259 | ||
38b3fef1 AE |
260 | BT_DBG("hcon %p", conn); |
261 | ||
e73439d8 MH |
262 | if (!status) { |
263 | if (lmp_esco_capable(conn->hdev)) | |
264 | hci_setup_sync(sco, conn->handle); | |
265 | else | |
266 | hci_add_sco(sco, conn->handle); | |
267 | } else { | |
268 | hci_proto_connect_cfm(sco, status); | |
269 | hci_conn_del(sco); | |
270 | } | |
271 | } | |
272 | ||
53502d69 AE |
273 | static void hci_conn_disconnect(struct hci_conn *conn) |
274 | { | |
275 | __u8 reason = hci_proto_disconn_ind(conn); | |
276 | ||
277 | switch (conn->type) { | |
53502d69 AE |
278 | case AMP_LINK: |
279 | hci_amp_disconn(conn, reason); | |
280 | break; | |
4c02e2d4 | 281 | default: |
bed71748 | 282 | hci_disconnect(conn, reason); |
4c02e2d4 | 283 | break; |
53502d69 AE |
284 | } |
285 | } | |
286 | ||
19c40e3b | 287 | static void hci_conn_timeout(struct work_struct *work) |
1da177e4 | 288 | { |
19c40e3b | 289 | struct hci_conn *conn = container_of(work, struct hci_conn, |
5974e4c4 | 290 | disc_work.work); |
1da177e4 | 291 | |
38b3fef1 | 292 | BT_DBG("hcon %p state %s", conn, state_to_string(conn->state)); |
1da177e4 LT |
293 | |
294 | if (atomic_read(&conn->refcnt)) | |
295 | return; | |
296 | ||
6ac59344 MH |
297 | switch (conn->state) { |
298 | case BT_CONNECT: | |
769be974 | 299 | case BT_CONNECT2: |
fcd89c09 VT |
300 | if (conn->out) { |
301 | if (conn->type == ACL_LINK) | |
1aef8669 | 302 | hci_acl_create_connection_cancel(conn); |
fcd89c09 | 303 | else if (conn->type == LE_LINK) |
1aef8669 | 304 | hci_le_create_connection_cancel(conn); |
93796fa6 CT |
305 | } else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) { |
306 | hci_reject_sco(conn); | |
fcd89c09 | 307 | } |
6ac59344 | 308 | break; |
769be974 | 309 | case BT_CONFIG: |
8e87d142 | 310 | case BT_CONNECTED: |
53502d69 | 311 | hci_conn_disconnect(conn); |
6ac59344 MH |
312 | break; |
313 | default: | |
1da177e4 | 314 | conn->state = BT_CLOSED; |
6ac59344 MH |
315 | break; |
316 | } | |
1da177e4 LT |
317 | } |
318 | ||
416dc94b | 319 | /* Enter sniff mode */ |
a74a84f6 | 320 | static void hci_conn_idle(struct work_struct *work) |
416dc94b | 321 | { |
a74a84f6 JH |
322 | struct hci_conn *conn = container_of(work, struct hci_conn, |
323 | idle_work.work); | |
416dc94b GP |
324 | struct hci_dev *hdev = conn->hdev; |
325 | ||
38b3fef1 | 326 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
416dc94b GP |
327 | |
328 | if (test_bit(HCI_RAW, &hdev->flags)) | |
329 | return; | |
330 | ||
331 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) | |
332 | return; | |
333 | ||
334 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
335 | return; | |
336 | ||
337 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
338 | struct hci_cp_sniff_subrate cp; | |
339 | cp.handle = cpu_to_le16(conn->handle); | |
82781e63 AE |
340 | cp.max_latency = __constant_cpu_to_le16(0); |
341 | cp.min_remote_timeout = __constant_cpu_to_le16(0); | |
342 | cp.min_local_timeout = __constant_cpu_to_le16(0); | |
416dc94b GP |
343 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); |
344 | } | |
345 | ||
51a8efd7 | 346 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
416dc94b GP |
347 | struct hci_cp_sniff_mode cp; |
348 | cp.handle = cpu_to_le16(conn->handle); | |
349 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
350 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
82781e63 AE |
351 | cp.attempt = __constant_cpu_to_le16(4); |
352 | cp.timeout = __constant_cpu_to_le16(1); | |
416dc94b GP |
353 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); |
354 | } | |
355 | } | |
356 | ||
7bc18d9d | 357 | static void hci_conn_auto_accept(struct work_struct *work) |
9f61656a | 358 | { |
7bc18d9d JH |
359 | struct hci_conn *conn = container_of(work, struct hci_conn, |
360 | auto_accept_work.work); | |
9f61656a | 361 | |
7bc18d9d | 362 | hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), |
5974e4c4 | 363 | &conn->dst); |
9f61656a JH |
364 | } |
365 | ||
1da177e4 LT |
366 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst) |
367 | { | |
368 | struct hci_conn *conn; | |
369 | ||
6ed93dc6 | 370 | BT_DBG("%s dst %pMR", hdev->name, dst); |
1da177e4 | 371 | |
cb601d7e | 372 | conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL); |
04837f64 | 373 | if (!conn) |
1da177e4 | 374 | return NULL; |
1da177e4 LT |
375 | |
376 | bacpy(&conn->dst, dst); | |
662e8820 | 377 | bacpy(&conn->src, &hdev->bdaddr); |
a8746417 MH |
378 | conn->hdev = hdev; |
379 | conn->type = type; | |
380 | conn->mode = HCI_CM_ACTIVE; | |
381 | conn->state = BT_OPEN; | |
93f19c9f | 382 | conn->auth_type = HCI_AT_GENERAL_BONDING; |
17fa4b9d | 383 | conn->io_capability = hdev->io_capability; |
a9583556 | 384 | conn->remote_auth = 0xff; |
13d39315 | 385 | conn->key_type = 0xff; |
1da177e4 | 386 | |
58a681ef | 387 | set_bit(HCI_CONN_POWER_SAVE, &conn->flags); |
052b30b0 | 388 | conn->disc_timeout = HCI_DISCONN_TIMEOUT; |
04837f64 | 389 | |
a8746417 MH |
390 | switch (type) { |
391 | case ACL_LINK: | |
392 | conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; | |
393 | break; | |
394 | case SCO_LINK: | |
395 | if (lmp_esco_capable(hdev)) | |
efc7688b MH |
396 | conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | |
397 | (hdev->esco_type & EDR_ESCO_MASK); | |
a8746417 MH |
398 | else |
399 | conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; | |
400 | break; | |
401 | case ESCO_LINK: | |
efc7688b | 402 | conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; |
a8746417 MH |
403 | break; |
404 | } | |
405 | ||
1da177e4 | 406 | skb_queue_head_init(&conn->data_q); |
04837f64 | 407 | |
70c1f20b | 408 | INIT_LIST_HEAD(&conn->chan_list); |
73d80deb | 409 | |
19c40e3b | 410 | INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout); |
7bc18d9d | 411 | INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept); |
a74a84f6 | 412 | INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle); |
1da177e4 LT |
413 | |
414 | atomic_set(&conn->refcnt, 0); | |
415 | ||
416 | hci_dev_hold(hdev); | |
417 | ||
1da177e4 | 418 | hci_conn_hash_add(hdev, conn); |
3c54711c | 419 | if (hdev->notify) |
1da177e4 LT |
420 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); |
421 | ||
a67e899c MH |
422 | hci_conn_init_sysfs(conn); |
423 | ||
1da177e4 LT |
424 | return conn; |
425 | } | |
426 | ||
427 | int hci_conn_del(struct hci_conn *conn) | |
428 | { | |
429 | struct hci_dev *hdev = conn->hdev; | |
430 | ||
38b3fef1 | 431 | BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle); |
1da177e4 | 432 | |
19c40e3b | 433 | cancel_delayed_work_sync(&conn->disc_work); |
7bc18d9d | 434 | cancel_delayed_work_sync(&conn->auto_accept_work); |
a74a84f6 | 435 | cancel_delayed_work_sync(&conn->idle_work); |
9f61656a | 436 | |
5b7f9909 | 437 | if (conn->type == ACL_LINK) { |
1da177e4 LT |
438 | struct hci_conn *sco = conn->link; |
439 | if (sco) | |
440 | sco->link = NULL; | |
441 | ||
442 | /* Unacked frames */ | |
443 | hdev->acl_cnt += conn->sent; | |
6ed58ec5 VT |
444 | } else if (conn->type == LE_LINK) { |
445 | if (hdev->le_pkts) | |
446 | hdev->le_cnt += conn->sent; | |
447 | else | |
448 | hdev->acl_cnt += conn->sent; | |
5b7f9909 MH |
449 | } else { |
450 | struct hci_conn *acl = conn->link; | |
451 | if (acl) { | |
452 | acl->link = NULL; | |
76a68ba0 | 453 | hci_conn_drop(acl); |
5b7f9909 | 454 | } |
1da177e4 LT |
455 | } |
456 | ||
2c33c06a | 457 | hci_chan_list_flush(conn); |
73d80deb | 458 | |
9740e49d AE |
459 | if (conn->amp_mgr) |
460 | amp_mgr_put(conn->amp_mgr); | |
461 | ||
1da177e4 | 462 | hci_conn_hash_del(hdev, conn); |
3c54711c | 463 | if (hdev->notify) |
1da177e4 | 464 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); |
7d0db0a3 | 465 | |
1da177e4 | 466 | skb_queue_purge(&conn->data_q); |
1da177e4 | 467 | |
fc225c3f | 468 | hci_conn_del_sysfs(conn); |
2ae9a6be | 469 | |
384943ec MH |
470 | hci_dev_put(hdev); |
471 | ||
8d12356f | 472 | hci_conn_put(conn); |
163f4dab | 473 | |
1da177e4 LT |
474 | return 0; |
475 | } | |
476 | ||
477 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
478 | { | |
479 | int use_src = bacmp(src, BDADDR_ANY); | |
8035ded4 | 480 | struct hci_dev *hdev = NULL, *d; |
1da177e4 | 481 | |
6ed93dc6 | 482 | BT_DBG("%pMR -> %pMR", src, dst); |
1da177e4 | 483 | |
f20d09d5 | 484 | read_lock(&hci_dev_list_lock); |
1da177e4 | 485 | |
8035ded4 | 486 | list_for_each_entry(d, &hci_dev_list, list) { |
8fc9ced3 | 487 | if (!test_bit(HCI_UP, &d->flags) || |
d300fa9b | 488 | test_bit(HCI_RAW, &d->flags) || |
af750e94 | 489 | test_bit(HCI_USER_CHANNEL, &d->dev_flags) || |
d300fa9b | 490 | d->dev_type != HCI_BREDR) |
1da177e4 LT |
491 | continue; |
492 | ||
8e87d142 | 493 | /* Simple routing: |
1da177e4 LT |
494 | * No source address - find interface with bdaddr != dst |
495 | * Source address - find interface with bdaddr == src | |
496 | */ | |
497 | ||
498 | if (use_src) { | |
499 | if (!bacmp(&d->bdaddr, src)) { | |
500 | hdev = d; break; | |
501 | } | |
502 | } else { | |
503 | if (bacmp(&d->bdaddr, dst)) { | |
504 | hdev = d; break; | |
505 | } | |
506 | } | |
507 | } | |
508 | ||
509 | if (hdev) | |
510 | hdev = hci_dev_hold(hdev); | |
511 | ||
f20d09d5 | 512 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
513 | return hdev; |
514 | } | |
515 | EXPORT_SYMBOL(hci_get_route); | |
516 | ||
9bb3c01f AG |
517 | /* This function requires the caller holds hdev->lock */ |
518 | static void le_conn_failed(struct hci_conn *conn, u8 status) | |
519 | { | |
520 | struct hci_dev *hdev = conn->hdev; | |
521 | ||
522 | conn->state = BT_CLOSED; | |
523 | ||
524 | mgmt_connect_failed(hdev, &conn->dst, conn->type, conn->dst_type, | |
525 | status); | |
526 | ||
527 | hci_proto_connect_cfm(conn, status); | |
528 | ||
529 | hci_conn_del(conn); | |
530 | } | |
531 | ||
1d399ae5 AG |
532 | static void create_le_conn_complete(struct hci_dev *hdev, u8 status) |
533 | { | |
534 | struct hci_conn *conn; | |
535 | ||
536 | if (status == 0) | |
537 | return; | |
538 | ||
539 | BT_ERR("HCI request failed to create LE connection: status 0x%2.2x", | |
540 | status); | |
541 | ||
542 | hci_dev_lock(hdev); | |
543 | ||
544 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
545 | if (!conn) | |
546 | goto done; | |
547 | ||
9bb3c01f | 548 | le_conn_failed(conn, status); |
1d399ae5 AG |
549 | |
550 | done: | |
551 | hci_dev_unlock(hdev); | |
552 | } | |
553 | ||
554 | static int hci_create_le_conn(struct hci_conn *conn) | |
555 | { | |
556 | struct hci_dev *hdev = conn->hdev; | |
557 | struct hci_cp_le_create_conn cp; | |
558 | struct hci_request req; | |
559 | int err; | |
560 | ||
561 | hci_req_init(&req, hdev); | |
562 | ||
563 | memset(&cp, 0, sizeof(cp)); | |
bef64738 MH |
564 | cp.scan_interval = cpu_to_le16(hdev->le_scan_interval); |
565 | cp.scan_window = cpu_to_le16(hdev->le_scan_window); | |
1d399ae5 AG |
566 | bacpy(&cp.peer_addr, &conn->dst); |
567 | cp.peer_addr_type = conn->dst_type; | |
e7c4096e | 568 | cp.own_address_type = conn->src_type; |
1e406eef AG |
569 | cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval); |
570 | cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval); | |
1d399ae5 AG |
571 | cp.supervision_timeout = __constant_cpu_to_le16(0x002a); |
572 | cp.min_ce_len = __constant_cpu_to_le16(0x0000); | |
573 | cp.max_ce_len = __constant_cpu_to_le16(0x0000); | |
4e70c7e7 | 574 | |
1d399ae5 AG |
575 | hci_req_add(&req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); |
576 | ||
577 | err = hci_req_run(&req, create_le_conn_complete); | |
578 | if (err) { | |
579 | hci_conn_del(conn); | |
580 | return err; | |
581 | } | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
d04aef4c VCG |
586 | static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, |
587 | u8 dst_type, u8 sec_level, u8 auth_type) | |
1da177e4 | 588 | { |
4292f1f3 | 589 | struct hci_conn_params *params; |
f1e5d547 | 590 | struct hci_conn *conn; |
1d399ae5 | 591 | int err; |
1da177e4 | 592 | |
f3d3444a | 593 | if (test_bit(HCI_ADVERTISING, &hdev->flags)) |
f1550478 JH |
594 | return ERR_PTR(-ENOTSUPP); |
595 | ||
620ad521 AG |
596 | /* Some devices send ATT messages as soon as the physical link is |
597 | * established. To be able to handle these ATT messages, the user- | |
598 | * space first establishes the connection and then starts the pairing | |
599 | * process. | |
600 | * | |
601 | * So if a hci_conn object already exists for the following connection | |
602 | * attempt, we simply update pending_sec_level and auth_type fields | |
603 | * and return the object found. | |
604 | */ | |
f1e5d547 | 605 | conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); |
620ad521 AG |
606 | if (conn) { |
607 | conn->pending_sec_level = sec_level; | |
608 | conn->auth_type = auth_type; | |
609 | goto done; | |
610 | } | |
dfc94dbd | 611 | |
620ad521 AG |
612 | /* Since the controller supports only one LE connection attempt at a |
613 | * time, we return -EBUSY if there is any connection attempt running. | |
614 | */ | |
615 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
616 | if (conn) | |
617 | return ERR_PTR(-EBUSY); | |
46a190cb | 618 | |
620ad521 AG |
619 | conn = hci_conn_add(hdev, LE_LINK, dst); |
620 | if (!conn) | |
621 | return ERR_PTR(-ENOMEM); | |
9f0caeb1 | 622 | |
79d95a19 MH |
623 | if (dst_type == BDADDR_LE_PUBLIC) |
624 | conn->dst_type = ADDR_LE_DEV_PUBLIC; | |
625 | else | |
626 | conn->dst_type = ADDR_LE_DEV_RANDOM; | |
e7c4096e | 627 | |
79830f66 | 628 | conn->src_type = hdev->own_addr_type; |
e7c4096e | 629 | |
620ad521 AG |
630 | conn->state = BT_CONNECT; |
631 | conn->out = true; | |
632 | conn->link_mode |= HCI_LM_MASTER; | |
633 | conn->sec_level = BT_SECURITY_LOW; | |
f1e5d547 AG |
634 | conn->pending_sec_level = sec_level; |
635 | conn->auth_type = auth_type; | |
4292f1f3 AG |
636 | |
637 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); | |
638 | if (params) { | |
639 | conn->le_conn_min_interval = params->conn_min_interval; | |
640 | conn->le_conn_max_interval = params->conn_max_interval; | |
641 | } else { | |
642 | conn->le_conn_min_interval = hdev->le_conn_min_interval; | |
643 | conn->le_conn_max_interval = hdev->le_conn_max_interval; | |
644 | } | |
eda42b50 | 645 | |
620ad521 AG |
646 | err = hci_create_le_conn(conn); |
647 | if (err) | |
648 | return ERR_PTR(err); | |
fcd89c09 | 649 | |
620ad521 AG |
650 | done: |
651 | hci_conn_hold(conn); | |
f1e5d547 | 652 | return conn; |
d04aef4c | 653 | } |
fcd89c09 | 654 | |
db474275 VCG |
655 | static struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst, |
656 | u8 sec_level, u8 auth_type) | |
1da177e4 LT |
657 | { |
658 | struct hci_conn *acl; | |
fcd89c09 | 659 | |
56f87901 JH |
660 | if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) |
661 | return ERR_PTR(-ENOTSUPP); | |
662 | ||
70f23020 AE |
663 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
664 | if (!acl) { | |
665 | acl = hci_conn_add(hdev, ACL_LINK, dst); | |
666 | if (!acl) | |
48c7aba9 | 667 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
668 | } |
669 | ||
670 | hci_conn_hold(acl); | |
671 | ||
09ab6f4c | 672 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
673 | acl->sec_level = BT_SECURITY_LOW; |
674 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 675 | acl->auth_type = auth_type; |
1aef8669 | 676 | hci_acl_create_connection(acl); |
09ab6f4c | 677 | } |
1da177e4 | 678 | |
db474275 VCG |
679 | return acl; |
680 | } | |
681 | ||
10c62ddc FD |
682 | struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst, |
683 | __u16 setting) | |
db474275 VCG |
684 | { |
685 | struct hci_conn *acl; | |
686 | struct hci_conn *sco; | |
687 | ||
e660ed6c | 688 | acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
db474275 | 689 | if (IS_ERR(acl)) |
5b7f9909 | 690 | return acl; |
1da177e4 | 691 | |
70f23020 AE |
692 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
693 | if (!sco) { | |
694 | sco = hci_conn_add(hdev, type, dst); | |
695 | if (!sco) { | |
76a68ba0 | 696 | hci_conn_drop(acl); |
48c7aba9 | 697 | return ERR_PTR(-ENOMEM); |
1da177e4 | 698 | } |
5b7f9909 | 699 | } |
1da177e4 | 700 | |
5b7f9909 MH |
701 | acl->link = sco; |
702 | sco->link = acl; | |
1da177e4 | 703 | |
5b7f9909 | 704 | hci_conn_hold(sco); |
1da177e4 | 705 | |
10c62ddc FD |
706 | sco->setting = setting; |
707 | ||
5b7f9909 | 708 | if (acl->state == BT_CONNECTED && |
5974e4c4 | 709 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
58a681ef | 710 | set_bit(HCI_CONN_POWER_SAVE, &acl->flags); |
14b12d0b | 711 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 712 | |
51a8efd7 | 713 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { |
e73439d8 | 714 | /* defer SCO setup until mode change completed */ |
51a8efd7 | 715 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); |
e73439d8 MH |
716 | return sco; |
717 | } | |
718 | ||
719 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 720 | } |
5b7f9909 MH |
721 | |
722 | return sco; | |
1da177e4 | 723 | } |
1da177e4 | 724 | |
b7d839bf VCG |
725 | /* Create SCO, ACL or LE connection. */ |
726 | struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, | |
727 | __u8 dst_type, __u8 sec_level, __u8 auth_type) | |
728 | { | |
6ed93dc6 | 729 | BT_DBG("%s dst %pMR type 0x%x", hdev->name, dst, type); |
b7d839bf | 730 | |
4cd2d983 VCG |
731 | switch (type) { |
732 | case LE_LINK: | |
b7d839bf | 733 | return hci_connect_le(hdev, dst, dst_type, sec_level, auth_type); |
4cd2d983 | 734 | case ACL_LINK: |
b7d839bf | 735 | return hci_connect_acl(hdev, dst, sec_level, auth_type); |
4cd2d983 | 736 | } |
b7d839bf | 737 | |
4cd2d983 | 738 | return ERR_PTR(-EINVAL); |
b7d839bf VCG |
739 | } |
740 | ||
e7c29cb1 MH |
741 | /* Check link security requirement */ |
742 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
743 | { | |
38b3fef1 | 744 | BT_DBG("hcon %p", conn); |
e7c29cb1 | 745 | |
aa64a8b5 | 746 | if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT)) |
e7c29cb1 MH |
747 | return 0; |
748 | ||
749 | return 1; | |
750 | } | |
e7c29cb1 | 751 | |
1da177e4 | 752 | /* Authenticate remote device */ |
0684e5f9 | 753 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 | 754 | { |
38b3fef1 | 755 | BT_DBG("hcon %p", conn); |
1da177e4 | 756 | |
765c2a96 JH |
757 | if (conn->pending_sec_level > sec_level) |
758 | sec_level = conn->pending_sec_level; | |
759 | ||
96a31833 | 760 | if (sec_level > conn->sec_level) |
765c2a96 | 761 | conn->pending_sec_level = sec_level; |
96a31833 | 762 | else if (conn->link_mode & HCI_LM_AUTH) |
1da177e4 LT |
763 | return 1; |
764 | ||
65cf686e JH |
765 | /* Make sure we preserve an existing MITM requirement*/ |
766 | auth_type |= (conn->auth_type & 0x01); | |
767 | ||
96a31833 MH |
768 | conn->auth_type = auth_type; |
769 | ||
51a8efd7 | 770 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 771 | struct hci_cp_auth_requested cp; |
b7d05bad PH |
772 | |
773 | /* encrypt must be pending if auth is also pending */ | |
774 | set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); | |
775 | ||
aca3192c | 776 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 777 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
5974e4c4 | 778 | sizeof(cp), &cp); |
19f8def0 | 779 | if (conn->key_type != 0xff) |
51a8efd7 | 780 | set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); |
1da177e4 | 781 | } |
8c1b2355 | 782 | |
1da177e4 LT |
783 | return 0; |
784 | } | |
1da177e4 | 785 | |
13d39315 WR |
786 | /* Encrypt the the link */ |
787 | static void hci_conn_encrypt(struct hci_conn *conn) | |
788 | { | |
38b3fef1 | 789 | BT_DBG("hcon %p", conn); |
13d39315 | 790 | |
51a8efd7 | 791 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { |
13d39315 WR |
792 | struct hci_cp_set_conn_encrypt cp; |
793 | cp.handle = cpu_to_le16(conn->handle); | |
794 | cp.encrypt = 0x01; | |
795 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
5974e4c4 | 796 | &cp); |
13d39315 WR |
797 | } |
798 | } | |
799 | ||
8c1b2355 | 800 | /* Enable security */ |
0684e5f9 | 801 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 | 802 | { |
38b3fef1 | 803 | BT_DBG("hcon %p", conn); |
1da177e4 | 804 | |
d8343f12 VCG |
805 | if (conn->type == LE_LINK) |
806 | return smp_conn_security(conn, sec_level); | |
807 | ||
13d39315 | 808 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
809 | if (sec_level == BT_SECURITY_SDP) |
810 | return 1; | |
811 | ||
13d39315 WR |
812 | /* For non 2.1 devices and low security level we don't need the link |
813 | key. */ | |
aa64a8b5 | 814 | if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) |
3fdca1e1 | 815 | return 1; |
8c1b2355 | 816 | |
13d39315 WR |
817 | /* For other security levels we need the link key. */ |
818 | if (!(conn->link_mode & HCI_LM_AUTH)) | |
819 | goto auth; | |
820 | ||
7b5a9241 MH |
821 | /* An authenticated FIPS approved combination key has sufficient |
822 | * security for security level 4. */ | |
823 | if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 && | |
824 | sec_level == BT_SECURITY_FIPS) | |
825 | goto encrypt; | |
826 | ||
827 | /* An authenticated combination key has sufficient security for | |
828 | security level 3. */ | |
829 | if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 || | |
830 | conn->key_type == HCI_LK_AUTH_COMBINATION_P256) && | |
831 | sec_level == BT_SECURITY_HIGH) | |
13d39315 WR |
832 | goto encrypt; |
833 | ||
834 | /* An unauthenticated combination key has sufficient security for | |
835 | security level 1 and 2. */ | |
66138ce8 MH |
836 | if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 || |
837 | conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) && | |
5974e4c4 | 838 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW)) |
13d39315 WR |
839 | goto encrypt; |
840 | ||
841 | /* A combination key has always sufficient security for the security | |
842 | levels 1 or 2. High security level requires the combination key | |
843 | is generated using maximum PIN code length (16). | |
844 | For pre 2.1 units. */ | |
845 | if (conn->key_type == HCI_LK_COMBINATION && | |
7b5a9241 MH |
846 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW || |
847 | conn->pin_length == 16)) | |
13d39315 WR |
848 | goto encrypt; |
849 | ||
850 | auth: | |
51a8efd7 | 851 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) |
1da177e4 LT |
852 | return 0; |
853 | ||
6fdf658c LAD |
854 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
855 | return 0; | |
13d39315 WR |
856 | |
857 | encrypt: | |
858 | if (conn->link_mode & HCI_LM_ENCRYPT) | |
859 | return 1; | |
8c1b2355 | 860 | |
13d39315 | 861 | hci_conn_encrypt(conn); |
1da177e4 LT |
862 | return 0; |
863 | } | |
8c1b2355 | 864 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 865 | |
b3b1b061 WR |
866 | /* Check secure link requirement */ |
867 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
868 | { | |
38b3fef1 | 869 | BT_DBG("hcon %p", conn); |
b3b1b061 | 870 | |
9cb2e030 MH |
871 | /* Accept if non-secure or higher security level is required */ |
872 | if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS) | |
873 | return 1; | |
b3b1b061 | 874 | |
9cb2e030 MH |
875 | /* Accept if secure or higher security level is already present */ |
876 | if (conn->sec_level == BT_SECURITY_HIGH || | |
877 | conn->sec_level == BT_SECURITY_FIPS) | |
b3b1b061 WR |
878 | return 1; |
879 | ||
9cb2e030 MH |
880 | /* Reject not secure link */ |
881 | return 0; | |
b3b1b061 WR |
882 | } |
883 | EXPORT_SYMBOL(hci_conn_check_secure); | |
884 | ||
1da177e4 LT |
885 | /* Change link key */ |
886 | int hci_conn_change_link_key(struct hci_conn *conn) | |
887 | { | |
38b3fef1 | 888 | BT_DBG("hcon %p", conn); |
1da177e4 | 889 | |
51a8efd7 | 890 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 891 | struct hci_cp_change_conn_link_key cp; |
aca3192c | 892 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 893 | hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY, |
5974e4c4 | 894 | sizeof(cp), &cp); |
1da177e4 | 895 | } |
8c1b2355 | 896 | |
1da177e4 LT |
897 | return 0; |
898 | } | |
1da177e4 LT |
899 | |
900 | /* Switch role */ | |
8c1b2355 | 901 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 | 902 | { |
38b3fef1 | 903 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
904 | |
905 | if (!role && conn->link_mode & HCI_LM_MASTER) | |
906 | return 1; | |
907 | ||
51a8efd7 | 908 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { |
1da177e4 LT |
909 | struct hci_cp_switch_role cp; |
910 | bacpy(&cp.bdaddr, &conn->dst); | |
911 | cp.role = role; | |
a9de9248 | 912 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 913 | } |
8c1b2355 | 914 | |
1da177e4 LT |
915 | return 0; |
916 | } | |
917 | EXPORT_SYMBOL(hci_conn_switch_role); | |
918 | ||
04837f64 | 919 | /* Enter active mode */ |
14b12d0b | 920 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
921 | { |
922 | struct hci_dev *hdev = conn->hdev; | |
923 | ||
38b3fef1 | 924 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
04837f64 MH |
925 | |
926 | if (test_bit(HCI_RAW, &hdev->flags)) | |
927 | return; | |
928 | ||
14b12d0b JG |
929 | if (conn->mode != HCI_CM_SNIFF) |
930 | goto timer; | |
931 | ||
58a681ef | 932 | if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) |
04837f64 MH |
933 | goto timer; |
934 | ||
51a8efd7 | 935 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
04837f64 | 936 | struct hci_cp_exit_sniff_mode cp; |
aca3192c | 937 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 938 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
939 | } |
940 | ||
941 | timer: | |
942 | if (hdev->idle_timeout > 0) | |
a74a84f6 JH |
943 | queue_delayed_work(hdev->workqueue, &conn->idle_work, |
944 | msecs_to_jiffies(hdev->idle_timeout)); | |
04837f64 MH |
945 | } |
946 | ||
1da177e4 LT |
947 | /* Drop all connection on the device */ |
948 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
949 | { | |
950 | struct hci_conn_hash *h = &hdev->conn_hash; | |
3c4e0df0 | 951 | struct hci_conn *c, *n; |
1da177e4 LT |
952 | |
953 | BT_DBG("hdev %s", hdev->name); | |
954 | ||
3c4e0df0 | 955 | list_for_each_entry_safe(c, n, &h->list, list) { |
1da177e4 LT |
956 | c->state = BT_CLOSED; |
957 | ||
9f5a0d7b | 958 | hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); |
1da177e4 LT |
959 | hci_conn_del(c); |
960 | } | |
961 | } | |
962 | ||
a9de9248 MH |
963 | /* Check pending connect attempts */ |
964 | void hci_conn_check_pending(struct hci_dev *hdev) | |
965 | { | |
966 | struct hci_conn *conn; | |
967 | ||
968 | BT_DBG("hdev %s", hdev->name); | |
969 | ||
970 | hci_dev_lock(hdev); | |
971 | ||
972 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
973 | if (conn) | |
1aef8669 | 974 | hci_acl_create_connection(conn); |
a9de9248 MH |
975 | |
976 | hci_dev_unlock(hdev); | |
977 | } | |
978 | ||
1da177e4 LT |
979 | int hci_get_conn_list(void __user *arg) |
980 | { | |
fc5fef61 | 981 | struct hci_conn *c; |
1da177e4 LT |
982 | struct hci_conn_list_req req, *cl; |
983 | struct hci_conn_info *ci; | |
984 | struct hci_dev *hdev; | |
1da177e4 LT |
985 | int n = 0, size, err; |
986 | ||
987 | if (copy_from_user(&req, arg, sizeof(req))) | |
988 | return -EFAULT; | |
989 | ||
990 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
991 | return -EINVAL; | |
992 | ||
993 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
994 | ||
70f23020 AE |
995 | cl = kmalloc(size, GFP_KERNEL); |
996 | if (!cl) | |
1da177e4 LT |
997 | return -ENOMEM; |
998 | ||
70f23020 AE |
999 | hdev = hci_dev_get(req.dev_id); |
1000 | if (!hdev) { | |
1da177e4 LT |
1001 | kfree(cl); |
1002 | return -ENODEV; | |
1003 | } | |
1004 | ||
1005 | ci = cl->conn_info; | |
1006 | ||
09fd0de5 | 1007 | hci_dev_lock(hdev); |
8035ded4 | 1008 | list_for_each_entry(c, &hdev->conn_hash.list, list) { |
1da177e4 LT |
1009 | bacpy(&(ci + n)->bdaddr, &c->dst); |
1010 | (ci + n)->handle = c->handle; | |
1011 | (ci + n)->type = c->type; | |
1012 | (ci + n)->out = c->out; | |
1013 | (ci + n)->state = c->state; | |
1014 | (ci + n)->link_mode = c->link_mode; | |
1015 | if (++n >= req.conn_num) | |
1016 | break; | |
1017 | } | |
09fd0de5 | 1018 | hci_dev_unlock(hdev); |
1da177e4 LT |
1019 | |
1020 | cl->dev_id = hdev->id; | |
1021 | cl->conn_num = n; | |
1022 | size = sizeof(req) + n * sizeof(*ci); | |
1023 | ||
1024 | hci_dev_put(hdev); | |
1025 | ||
1026 | err = copy_to_user(arg, cl, size); | |
1027 | kfree(cl); | |
1028 | ||
1029 | return err ? -EFAULT : 0; | |
1030 | } | |
1031 | ||
1032 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
1033 | { | |
1034 | struct hci_conn_info_req req; | |
1035 | struct hci_conn_info ci; | |
1036 | struct hci_conn *conn; | |
1037 | char __user *ptr = arg + sizeof(req); | |
1038 | ||
1039 | if (copy_from_user(&req, arg, sizeof(req))) | |
1040 | return -EFAULT; | |
1041 | ||
09fd0de5 | 1042 | hci_dev_lock(hdev); |
1da177e4 LT |
1043 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); |
1044 | if (conn) { | |
1045 | bacpy(&ci.bdaddr, &conn->dst); | |
1046 | ci.handle = conn->handle; | |
1047 | ci.type = conn->type; | |
1048 | ci.out = conn->out; | |
1049 | ci.state = conn->state; | |
1050 | ci.link_mode = conn->link_mode; | |
1051 | } | |
09fd0de5 | 1052 | hci_dev_unlock(hdev); |
1da177e4 LT |
1053 | |
1054 | if (!conn) | |
1055 | return -ENOENT; | |
1056 | ||
1057 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
1058 | } | |
40be492f MH |
1059 | |
1060 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
1061 | { | |
1062 | struct hci_auth_info_req req; | |
1063 | struct hci_conn *conn; | |
1064 | ||
1065 | if (copy_from_user(&req, arg, sizeof(req))) | |
1066 | return -EFAULT; | |
1067 | ||
09fd0de5 | 1068 | hci_dev_lock(hdev); |
40be492f MH |
1069 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); |
1070 | if (conn) | |
1071 | req.type = conn->auth_type; | |
09fd0de5 | 1072 | hci_dev_unlock(hdev); |
40be492f MH |
1073 | |
1074 | if (!conn) | |
1075 | return -ENOENT; | |
1076 | ||
1077 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
1078 | } | |
73d80deb LAD |
1079 | |
1080 | struct hci_chan *hci_chan_create(struct hci_conn *conn) | |
1081 | { | |
1082 | struct hci_dev *hdev = conn->hdev; | |
1083 | struct hci_chan *chan; | |
1084 | ||
38b3fef1 | 1085 | BT_DBG("%s hcon %p", hdev->name, conn); |
73d80deb | 1086 | |
75d7735c | 1087 | chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL); |
73d80deb LAD |
1088 | if (!chan) |
1089 | return NULL; | |
1090 | ||
1091 | chan->conn = conn; | |
1092 | skb_queue_head_init(&chan->data_q); | |
168df8e5 | 1093 | chan->state = BT_CONNECTED; |
73d80deb | 1094 | |
8192edef | 1095 | list_add_rcu(&chan->list, &conn->chan_list); |
73d80deb LAD |
1096 | |
1097 | return chan; | |
1098 | } | |
1099 | ||
9472007c | 1100 | void hci_chan_del(struct hci_chan *chan) |
73d80deb LAD |
1101 | { |
1102 | struct hci_conn *conn = chan->conn; | |
1103 | struct hci_dev *hdev = conn->hdev; | |
1104 | ||
38b3fef1 | 1105 | BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan); |
73d80deb | 1106 | |
8192edef GP |
1107 | list_del_rcu(&chan->list); |
1108 | ||
1109 | synchronize_rcu(); | |
73d80deb | 1110 | |
76a68ba0 | 1111 | hci_conn_drop(conn); |
e9b02748 | 1112 | |
73d80deb LAD |
1113 | skb_queue_purge(&chan->data_q); |
1114 | kfree(chan); | |
73d80deb LAD |
1115 | } |
1116 | ||
2c33c06a | 1117 | void hci_chan_list_flush(struct hci_conn *conn) |
73d80deb | 1118 | { |
2a5a5ec6 | 1119 | struct hci_chan *chan, *n; |
73d80deb | 1120 | |
38b3fef1 | 1121 | BT_DBG("hcon %p", conn); |
73d80deb | 1122 | |
2a5a5ec6 | 1123 | list_for_each_entry_safe(chan, n, &conn->chan_list, list) |
73d80deb LAD |
1124 | hci_chan_del(chan); |
1125 | } | |
42c4e53e AE |
1126 | |
1127 | static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon, | |
1128 | __u16 handle) | |
1129 | { | |
1130 | struct hci_chan *hchan; | |
1131 | ||
1132 | list_for_each_entry(hchan, &hcon->chan_list, list) { | |
1133 | if (hchan->handle == handle) | |
1134 | return hchan; | |
1135 | } | |
1136 | ||
1137 | return NULL; | |
1138 | } | |
1139 | ||
1140 | struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle) | |
1141 | { | |
1142 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1143 | struct hci_conn *hcon; | |
1144 | struct hci_chan *hchan = NULL; | |
1145 | ||
1146 | rcu_read_lock(); | |
1147 | ||
1148 | list_for_each_entry_rcu(hcon, &h->list, list) { | |
1149 | hchan = __hci_chan_lookup_handle(hcon, handle); | |
1150 | if (hchan) | |
1151 | break; | |
1152 | } | |
1153 | ||
1154 | rcu_read_unlock(); | |
1155 | ||
1156 | return hchan; | |
1157 | } |