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 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/kernel.h> | |
1da177e4 LT |
32 | #include <linux/slab.h> |
33 | #include <linux/poll.h> | |
34 | #include <linux/fcntl.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/skbuff.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/notifier.h> | |
39 | #include <net/sock.h> | |
40 | ||
41 | #include <asm/system.h> | |
70f23020 | 42 | #include <linux/uaccess.h> |
1da177e4 LT |
43 | #include <asm/unaligned.h> |
44 | ||
45 | #include <net/bluetooth/bluetooth.h> | |
46 | #include <net/bluetooth/hci_core.h> | |
47 | ||
fcd89c09 VT |
48 | static void hci_le_connect(struct hci_conn *conn) |
49 | { | |
50 | struct hci_dev *hdev = conn->hdev; | |
51 | struct hci_cp_le_create_conn cp; | |
52 | ||
53 | conn->state = BT_CONNECT; | |
54 | conn->out = 1; | |
b92a6223 | 55 | conn->link_mode |= HCI_LM_MASTER; |
7b5c0d52 | 56 | conn->sec_level = BT_SECURITY_LOW; |
fcd89c09 VT |
57 | |
58 | memset(&cp, 0, sizeof(cp)); | |
59 | cp.scan_interval = cpu_to_le16(0x0004); | |
60 | cp.scan_window = cpu_to_le16(0x0004); | |
61 | bacpy(&cp.peer_addr, &conn->dst); | |
6d3ce0e7 | 62 | cp.peer_addr_type = conn->dst_type; |
fcd89c09 VT |
63 | cp.conn_interval_min = cpu_to_le16(0x0008); |
64 | cp.conn_interval_max = cpu_to_le16(0x0100); | |
65 | cp.supervision_timeout = cpu_to_le16(0x0064); | |
66 | cp.min_ce_len = cpu_to_le16(0x0001); | |
67 | cp.max_ce_len = cpu_to_le16(0x0001); | |
68 | ||
69 | hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); | |
70 | } | |
71 | ||
72 | static void hci_le_connect_cancel(struct hci_conn *conn) | |
73 | { | |
74 | hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); | |
75 | } | |
76 | ||
4c67bc74 | 77 | void hci_acl_connect(struct hci_conn *conn) |
1da177e4 LT |
78 | { |
79 | struct hci_dev *hdev = conn->hdev; | |
80 | struct inquiry_entry *ie; | |
81 | struct hci_cp_create_conn cp; | |
82 | ||
83 | BT_DBG("%p", conn); | |
84 | ||
85 | conn->state = BT_CONNECT; | |
a8746417 MH |
86 | conn->out = 1; |
87 | ||
1da177e4 LT |
88 | conn->link_mode = HCI_LM_MASTER; |
89 | ||
4c67bc74 MH |
90 | conn->attempt++; |
91 | ||
e4e8e37c MH |
92 | conn->link_policy = hdev->link_policy; |
93 | ||
1da177e4 LT |
94 | memset(&cp, 0, sizeof(cp)); |
95 | bacpy(&cp.bdaddr, &conn->dst); | |
96 | cp.pscan_rep_mode = 0x02; | |
97 | ||
70f23020 AE |
98 | ie = hci_inquiry_cache_lookup(hdev, &conn->dst); |
99 | if (ie) { | |
41a96212 MH |
100 | if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { |
101 | cp.pscan_rep_mode = ie->data.pscan_rep_mode; | |
102 | cp.pscan_mode = ie->data.pscan_mode; | |
103 | cp.clock_offset = ie->data.clock_offset | | |
104 | cpu_to_le16(0x8000); | |
105 | } | |
106 | ||
1da177e4 | 107 | memcpy(conn->dev_class, ie->data.dev_class, 3); |
41a96212 | 108 | conn->ssp_mode = ie->data.ssp_mode; |
1da177e4 LT |
109 | } |
110 | ||
a8746417 | 111 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 112 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) |
b6a0dc82 | 113 | cp.role_switch = 0x01; |
1da177e4 | 114 | else |
b6a0dc82 | 115 | cp.role_switch = 0x00; |
4c67bc74 | 116 | |
a9de9248 | 117 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); |
1da177e4 LT |
118 | } |
119 | ||
6ac59344 MH |
120 | static void hci_acl_connect_cancel(struct hci_conn *conn) |
121 | { | |
122 | struct hci_cp_create_conn_cancel cp; | |
123 | ||
124 | BT_DBG("%p", conn); | |
125 | ||
126 | if (conn->hdev->hci_ver < 2) | |
127 | return; | |
128 | ||
129 | bacpy(&cp.bdaddr, &conn->dst); | |
a9de9248 | 130 | hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); |
6ac59344 MH |
131 | } |
132 | ||
1da177e4 LT |
133 | void hci_acl_disconn(struct hci_conn *conn, __u8 reason) |
134 | { | |
135 | struct hci_cp_disconnect cp; | |
136 | ||
137 | BT_DBG("%p", conn); | |
138 | ||
139 | conn->state = BT_DISCONN; | |
140 | ||
aca3192c | 141 | cp.handle = cpu_to_le16(conn->handle); |
1da177e4 | 142 | cp.reason = reason; |
a9de9248 | 143 | hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); |
1da177e4 LT |
144 | } |
145 | ||
146 | void hci_add_sco(struct hci_conn *conn, __u16 handle) | |
147 | { | |
148 | struct hci_dev *hdev = conn->hdev; | |
149 | struct hci_cp_add_sco cp; | |
150 | ||
151 | BT_DBG("%p", conn); | |
152 | ||
153 | conn->state = BT_CONNECT; | |
154 | conn->out = 1; | |
155 | ||
efc7688b MH |
156 | conn->attempt++; |
157 | ||
aca3192c | 158 | cp.handle = cpu_to_le16(handle); |
a8746417 | 159 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 160 | |
a9de9248 | 161 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); |
1da177e4 LT |
162 | } |
163 | ||
b6a0dc82 MH |
164 | void hci_setup_sync(struct hci_conn *conn, __u16 handle) |
165 | { | |
166 | struct hci_dev *hdev = conn->hdev; | |
167 | struct hci_cp_setup_sync_conn cp; | |
168 | ||
169 | BT_DBG("%p", conn); | |
170 | ||
171 | conn->state = BT_CONNECT; | |
172 | conn->out = 1; | |
173 | ||
efc7688b MH |
174 | conn->attempt++; |
175 | ||
b6a0dc82 | 176 | cp.handle = cpu_to_le16(handle); |
a8746417 | 177 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
b6a0dc82 MH |
178 | |
179 | cp.tx_bandwidth = cpu_to_le32(0x00001f40); | |
180 | cp.rx_bandwidth = cpu_to_le32(0x00001f40); | |
181 | cp.max_latency = cpu_to_le16(0xffff); | |
182 | cp.voice_setting = cpu_to_le16(hdev->voice_setting); | |
183 | cp.retrans_effort = 0xff; | |
184 | ||
185 | hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp); | |
186 | } | |
187 | ||
2ce603eb CT |
188 | void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, |
189 | u16 latency, u16 to_multiplier) | |
190 | { | |
191 | struct hci_cp_le_conn_update cp; | |
192 | struct hci_dev *hdev = conn->hdev; | |
193 | ||
194 | memset(&cp, 0, sizeof(cp)); | |
195 | ||
196 | cp.handle = cpu_to_le16(conn->handle); | |
197 | cp.conn_interval_min = cpu_to_le16(min); | |
198 | cp.conn_interval_max = cpu_to_le16(max); | |
199 | cp.conn_latency = cpu_to_le16(latency); | |
200 | cp.supervision_timeout = cpu_to_le16(to_multiplier); | |
201 | cp.min_ce_len = cpu_to_le16(0x0001); | |
202 | cp.max_ce_len = cpu_to_le16(0x0001); | |
203 | ||
204 | hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); | |
205 | } | |
206 | EXPORT_SYMBOL(hci_le_conn_update); | |
207 | ||
a7a595f6 VCG |
208 | void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8], |
209 | __u8 ltk[16]) | |
210 | { | |
211 | struct hci_dev *hdev = conn->hdev; | |
212 | struct hci_cp_le_start_enc cp; | |
213 | ||
214 | BT_DBG("%p", conn); | |
215 | ||
216 | memset(&cp, 0, sizeof(cp)); | |
217 | ||
218 | cp.handle = cpu_to_le16(conn->handle); | |
219 | memcpy(cp.ltk, ltk, sizeof(cp.ltk)); | |
220 | cp.ediv = ediv; | |
221 | memcpy(cp.rand, rand, sizeof(rand)); | |
222 | ||
223 | hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); | |
224 | } | |
225 | EXPORT_SYMBOL(hci_le_start_enc); | |
226 | ||
227 | void hci_le_ltk_reply(struct hci_conn *conn, u8 ltk[16]) | |
228 | { | |
229 | struct hci_dev *hdev = conn->hdev; | |
230 | struct hci_cp_le_ltk_reply cp; | |
231 | ||
232 | BT_DBG("%p", conn); | |
233 | ||
234 | memset(&cp, 0, sizeof(cp)); | |
235 | ||
236 | cp.handle = cpu_to_le16(conn->handle); | |
237 | memcpy(cp.ltk, ltk, sizeof(ltk)); | |
238 | ||
239 | hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp); | |
240 | } | |
241 | EXPORT_SYMBOL(hci_le_ltk_reply); | |
242 | ||
243 | void hci_le_ltk_neg_reply(struct hci_conn *conn) | |
244 | { | |
245 | struct hci_dev *hdev = conn->hdev; | |
246 | struct hci_cp_le_ltk_neg_reply cp; | |
247 | ||
248 | BT_DBG("%p", conn); | |
249 | ||
250 | memset(&cp, 0, sizeof(cp)); | |
251 | ||
252 | cp.handle = cpu_to_le16(conn->handle); | |
253 | ||
254 | hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(cp), &cp); | |
255 | } | |
256 | ||
e73439d8 MH |
257 | /* Device _must_ be locked */ |
258 | void hci_sco_setup(struct hci_conn *conn, __u8 status) | |
259 | { | |
260 | struct hci_conn *sco = conn->link; | |
261 | ||
262 | BT_DBG("%p", conn); | |
263 | ||
264 | if (!sco) | |
265 | return; | |
266 | ||
267 | if (!status) { | |
268 | if (lmp_esco_capable(conn->hdev)) | |
269 | hci_setup_sync(sco, conn->handle); | |
270 | else | |
271 | hci_add_sco(sco, conn->handle); | |
272 | } else { | |
273 | hci_proto_connect_cfm(sco, status); | |
274 | hci_conn_del(sco); | |
275 | } | |
276 | } | |
277 | ||
1da177e4 LT |
278 | static void hci_conn_timeout(unsigned long arg) |
279 | { | |
04837f64 MH |
280 | struct hci_conn *conn = (void *) arg; |
281 | struct hci_dev *hdev = conn->hdev; | |
2950f21a | 282 | __u8 reason; |
1da177e4 LT |
283 | |
284 | BT_DBG("conn %p state %d", conn, conn->state); | |
285 | ||
286 | if (atomic_read(&conn->refcnt)) | |
287 | return; | |
288 | ||
289 | hci_dev_lock(hdev); | |
6ac59344 MH |
290 | |
291 | switch (conn->state) { | |
292 | case BT_CONNECT: | |
769be974 | 293 | case BT_CONNECT2: |
fcd89c09 VT |
294 | if (conn->out) { |
295 | if (conn->type == ACL_LINK) | |
296 | hci_acl_connect_cancel(conn); | |
297 | else if (conn->type == LE_LINK) | |
298 | hci_le_connect_cancel(conn); | |
299 | } | |
6ac59344 | 300 | break; |
769be974 | 301 | case BT_CONFIG: |
8e87d142 | 302 | case BT_CONNECTED: |
2950f21a MH |
303 | reason = hci_proto_disconn_ind(conn); |
304 | hci_acl_disconn(conn, reason); | |
6ac59344 MH |
305 | break; |
306 | default: | |
1da177e4 | 307 | conn->state = BT_CLOSED; |
6ac59344 MH |
308 | break; |
309 | } | |
310 | ||
1da177e4 | 311 | hci_dev_unlock(hdev); |
1da177e4 LT |
312 | } |
313 | ||
04837f64 | 314 | static void hci_conn_idle(unsigned long arg) |
1da177e4 | 315 | { |
04837f64 MH |
316 | struct hci_conn *conn = (void *) arg; |
317 | ||
318 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
319 | ||
320 | hci_conn_enter_sniff_mode(conn); | |
1da177e4 LT |
321 | } |
322 | ||
9f61656a JH |
323 | static void hci_conn_auto_accept(unsigned long arg) |
324 | { | |
325 | struct hci_conn *conn = (void *) arg; | |
326 | struct hci_dev *hdev = conn->hdev; | |
327 | ||
328 | hci_dev_lock(hdev); | |
329 | ||
330 | hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), | |
331 | &conn->dst); | |
332 | ||
333 | hci_dev_unlock(hdev); | |
334 | } | |
335 | ||
1da177e4 LT |
336 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst) |
337 | { | |
338 | struct hci_conn *conn; | |
339 | ||
340 | BT_DBG("%s dst %s", hdev->name, batostr(dst)); | |
341 | ||
04837f64 MH |
342 | conn = kzalloc(sizeof(struct hci_conn), GFP_ATOMIC); |
343 | if (!conn) | |
1da177e4 | 344 | return NULL; |
1da177e4 LT |
345 | |
346 | bacpy(&conn->dst, dst); | |
a8746417 MH |
347 | conn->hdev = hdev; |
348 | conn->type = type; | |
349 | conn->mode = HCI_CM_ACTIVE; | |
350 | conn->state = BT_OPEN; | |
93f19c9f | 351 | conn->auth_type = HCI_AT_GENERAL_BONDING; |
17fa4b9d | 352 | conn->io_capability = hdev->io_capability; |
a9583556 | 353 | conn->remote_auth = 0xff; |
13d39315 | 354 | conn->key_type = 0xff; |
1da177e4 | 355 | |
04837f64 | 356 | conn->power_save = 1; |
052b30b0 | 357 | conn->disc_timeout = HCI_DISCONN_TIMEOUT; |
04837f64 | 358 | |
a8746417 MH |
359 | switch (type) { |
360 | case ACL_LINK: | |
361 | conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; | |
362 | break; | |
363 | case SCO_LINK: | |
364 | if (lmp_esco_capable(hdev)) | |
efc7688b MH |
365 | conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | |
366 | (hdev->esco_type & EDR_ESCO_MASK); | |
a8746417 MH |
367 | else |
368 | conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; | |
369 | break; | |
370 | case ESCO_LINK: | |
efc7688b | 371 | conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; |
a8746417 MH |
372 | break; |
373 | } | |
374 | ||
1da177e4 | 375 | skb_queue_head_init(&conn->data_q); |
04837f64 | 376 | |
b24b8a24 PE |
377 | setup_timer(&conn->disc_timer, hci_conn_timeout, (unsigned long)conn); |
378 | setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn); | |
9f61656a JH |
379 | setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept, |
380 | (unsigned long) conn); | |
1da177e4 LT |
381 | |
382 | atomic_set(&conn->refcnt, 0); | |
383 | ||
384 | hci_dev_hold(hdev); | |
385 | ||
386 | tasklet_disable(&hdev->tx_task); | |
387 | ||
388 | hci_conn_hash_add(hdev, conn); | |
389 | if (hdev->notify) | |
390 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); | |
391 | ||
9eba32b8 MH |
392 | atomic_set(&conn->devref, 0); |
393 | ||
a67e899c MH |
394 | hci_conn_init_sysfs(conn); |
395 | ||
1da177e4 LT |
396 | tasklet_enable(&hdev->tx_task); |
397 | ||
398 | return conn; | |
399 | } | |
400 | ||
401 | int hci_conn_del(struct hci_conn *conn) | |
402 | { | |
403 | struct hci_dev *hdev = conn->hdev; | |
404 | ||
405 | BT_DBG("%s conn %p handle %d", hdev->name, conn, conn->handle); | |
406 | ||
04837f64 MH |
407 | del_timer(&conn->idle_timer); |
408 | ||
409 | del_timer(&conn->disc_timer); | |
1da177e4 | 410 | |
9f61656a JH |
411 | del_timer(&conn->auto_accept_timer); |
412 | ||
5b7f9909 | 413 | if (conn->type == ACL_LINK) { |
1da177e4 LT |
414 | struct hci_conn *sco = conn->link; |
415 | if (sco) | |
416 | sco->link = NULL; | |
417 | ||
418 | /* Unacked frames */ | |
419 | hdev->acl_cnt += conn->sent; | |
6ed58ec5 VT |
420 | } else if (conn->type == LE_LINK) { |
421 | if (hdev->le_pkts) | |
422 | hdev->le_cnt += conn->sent; | |
423 | else | |
424 | hdev->acl_cnt += conn->sent; | |
5b7f9909 MH |
425 | } else { |
426 | struct hci_conn *acl = conn->link; | |
427 | if (acl) { | |
428 | acl->link = NULL; | |
429 | hci_conn_put(acl); | |
430 | } | |
1da177e4 LT |
431 | } |
432 | ||
433 | tasklet_disable(&hdev->tx_task); | |
7d0db0a3 | 434 | |
1da177e4 LT |
435 | hci_conn_hash_del(hdev, conn); |
436 | if (hdev->notify) | |
437 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); | |
7d0db0a3 | 438 | |
1da177e4 | 439 | tasklet_enable(&hdev->tx_task); |
7d0db0a3 | 440 | |
1da177e4 | 441 | skb_queue_purge(&conn->data_q); |
1da177e4 | 442 | |
9eba32b8 | 443 | hci_conn_put_device(conn); |
2ae9a6be | 444 | |
384943ec MH |
445 | hci_dev_put(hdev); |
446 | ||
163f4dab TT |
447 | if (conn->handle == 0) |
448 | kfree(conn); | |
449 | ||
1da177e4 LT |
450 | return 0; |
451 | } | |
452 | ||
453 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
454 | { | |
455 | int use_src = bacmp(src, BDADDR_ANY); | |
456 | struct hci_dev *hdev = NULL; | |
457 | struct list_head *p; | |
458 | ||
459 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
460 | ||
461 | read_lock_bh(&hci_dev_list_lock); | |
462 | ||
463 | list_for_each(p, &hci_dev_list) { | |
464 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
465 | ||
466 | if (!test_bit(HCI_UP, &d->flags) || test_bit(HCI_RAW, &d->flags)) | |
467 | continue; | |
468 | ||
8e87d142 | 469 | /* Simple routing: |
1da177e4 LT |
470 | * No source address - find interface with bdaddr != dst |
471 | * Source address - find interface with bdaddr == src | |
472 | */ | |
473 | ||
474 | if (use_src) { | |
475 | if (!bacmp(&d->bdaddr, src)) { | |
476 | hdev = d; break; | |
477 | } | |
478 | } else { | |
479 | if (bacmp(&d->bdaddr, dst)) { | |
480 | hdev = d; break; | |
481 | } | |
482 | } | |
483 | } | |
484 | ||
485 | if (hdev) | |
486 | hdev = hci_dev_hold(hdev); | |
487 | ||
488 | read_unlock_bh(&hci_dev_list_lock); | |
489 | return hdev; | |
490 | } | |
491 | EXPORT_SYMBOL(hci_get_route); | |
492 | ||
fcd89c09 | 493 | /* Create SCO, ACL or LE connection. |
1da177e4 | 494 | * Device _must_ be locked */ |
8c1b2355 | 495 | struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, __u8 sec_level, __u8 auth_type) |
1da177e4 LT |
496 | { |
497 | struct hci_conn *acl; | |
5b7f9909 | 498 | struct hci_conn *sco; |
fcd89c09 | 499 | struct hci_conn *le; |
1da177e4 LT |
500 | |
501 | BT_DBG("%s dst %s", hdev->name, batostr(dst)); | |
502 | ||
fcd89c09 | 503 | if (type == LE_LINK) { |
eda42b50 AG |
504 | struct adv_entry *entry; |
505 | ||
fcd89c09 | 506 | le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); |
15c4794f | 507 | if (le) |
30e76272 | 508 | return ERR_PTR(-EBUSY); |
eda42b50 AG |
509 | |
510 | entry = hci_find_adv_entry(hdev, dst); | |
511 | if (!entry) | |
512 | return ERR_PTR(-EHOSTUNREACH); | |
513 | ||
15c4794f | 514 | le = hci_conn_add(hdev, LE_LINK, dst); |
fcd89c09 | 515 | if (!le) |
30e76272 | 516 | return ERR_PTR(-ENOMEM); |
893d6751 | 517 | |
eda42b50 AG |
518 | le->dst_type = entry->bdaddr_type; |
519 | ||
893d6751 | 520 | hci_le_connect(le); |
fcd89c09 VT |
521 | |
522 | hci_conn_hold(le); | |
523 | ||
524 | return le; | |
525 | } | |
526 | ||
70f23020 AE |
527 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
528 | if (!acl) { | |
529 | acl = hci_conn_add(hdev, ACL_LINK, dst); | |
530 | if (!acl) | |
1da177e4 LT |
531 | return NULL; |
532 | } | |
533 | ||
534 | hci_conn_hold(acl); | |
535 | ||
09ab6f4c | 536 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
537 | acl->sec_level = BT_SECURITY_LOW; |
538 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 539 | acl->auth_type = auth_type; |
1da177e4 | 540 | hci_acl_connect(acl); |
09ab6f4c | 541 | } |
1da177e4 | 542 | |
5b7f9909 MH |
543 | if (type == ACL_LINK) |
544 | return acl; | |
1da177e4 | 545 | |
70f23020 AE |
546 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
547 | if (!sco) { | |
548 | sco = hci_conn_add(hdev, type, dst); | |
549 | if (!sco) { | |
5b7f9909 MH |
550 | hci_conn_put(acl); |
551 | return NULL; | |
1da177e4 | 552 | } |
5b7f9909 | 553 | } |
1da177e4 | 554 | |
5b7f9909 MH |
555 | acl->link = sco; |
556 | sco->link = acl; | |
1da177e4 | 557 | |
5b7f9909 | 558 | hci_conn_hold(sco); |
1da177e4 | 559 | |
5b7f9909 | 560 | if (acl->state == BT_CONNECTED && |
b6a0dc82 | 561 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
c390216b | 562 | acl->power_save = 1; |
14b12d0b | 563 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 564 | |
e73439d8 MH |
565 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->pend)) { |
566 | /* defer SCO setup until mode change completed */ | |
567 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->pend); | |
568 | return sco; | |
569 | } | |
570 | ||
571 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 572 | } |
5b7f9909 MH |
573 | |
574 | return sco; | |
1da177e4 LT |
575 | } |
576 | EXPORT_SYMBOL(hci_connect); | |
577 | ||
e7c29cb1 MH |
578 | /* Check link security requirement */ |
579 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
580 | { | |
581 | BT_DBG("conn %p", conn); | |
582 | ||
583 | if (conn->ssp_mode > 0 && conn->hdev->ssp_mode > 0 && | |
584 | !(conn->link_mode & HCI_LM_ENCRYPT)) | |
585 | return 0; | |
586 | ||
587 | return 1; | |
588 | } | |
589 | EXPORT_SYMBOL(hci_conn_check_link_mode); | |
590 | ||
1da177e4 | 591 | /* Authenticate remote device */ |
0684e5f9 | 592 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 LT |
593 | { |
594 | BT_DBG("conn %p", conn); | |
595 | ||
765c2a96 JH |
596 | if (conn->pending_sec_level > sec_level) |
597 | sec_level = conn->pending_sec_level; | |
598 | ||
96a31833 | 599 | if (sec_level > conn->sec_level) |
765c2a96 | 600 | conn->pending_sec_level = sec_level; |
96a31833 | 601 | else if (conn->link_mode & HCI_LM_AUTH) |
1da177e4 LT |
602 | return 1; |
603 | ||
65cf686e JH |
604 | /* Make sure we preserve an existing MITM requirement*/ |
605 | auth_type |= (conn->auth_type & 0x01); | |
606 | ||
96a31833 MH |
607 | conn->auth_type = auth_type; |
608 | ||
1da177e4 LT |
609 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) { |
610 | struct hci_cp_auth_requested cp; | |
aca3192c | 611 | cp.handle = cpu_to_le16(conn->handle); |
40be492f MH |
612 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
613 | sizeof(cp), &cp); | |
19f8def0 WR |
614 | if (conn->key_type != 0xff) |
615 | set_bit(HCI_CONN_REAUTH_PEND, &conn->pend); | |
1da177e4 | 616 | } |
8c1b2355 | 617 | |
1da177e4 LT |
618 | return 0; |
619 | } | |
1da177e4 | 620 | |
13d39315 WR |
621 | /* Encrypt the the link */ |
622 | static void hci_conn_encrypt(struct hci_conn *conn) | |
623 | { | |
624 | BT_DBG("conn %p", conn); | |
625 | ||
626 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend)) { | |
627 | struct hci_cp_set_conn_encrypt cp; | |
628 | cp.handle = cpu_to_le16(conn->handle); | |
629 | cp.encrypt = 0x01; | |
630 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
631 | &cp); | |
632 | } | |
633 | } | |
634 | ||
8c1b2355 | 635 | /* Enable security */ |
0684e5f9 | 636 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 LT |
637 | { |
638 | BT_DBG("conn %p", conn); | |
639 | ||
13d39315 | 640 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
641 | if (sec_level == BT_SECURITY_SDP) |
642 | return 1; | |
643 | ||
13d39315 WR |
644 | /* For non 2.1 devices and low security level we don't need the link |
645 | key. */ | |
3fdca1e1 MH |
646 | if (sec_level == BT_SECURITY_LOW && |
647 | (!conn->ssp_mode || !conn->hdev->ssp_mode)) | |
648 | return 1; | |
8c1b2355 | 649 | |
13d39315 WR |
650 | /* For other security levels we need the link key. */ |
651 | if (!(conn->link_mode & HCI_LM_AUTH)) | |
652 | goto auth; | |
653 | ||
654 | /* An authenticated combination key has sufficient security for any | |
655 | security level. */ | |
656 | if (conn->key_type == HCI_LK_AUTH_COMBINATION) | |
657 | goto encrypt; | |
658 | ||
659 | /* An unauthenticated combination key has sufficient security for | |
660 | security level 1 and 2. */ | |
661 | if (conn->key_type == HCI_LK_UNAUTH_COMBINATION && | |
662 | (sec_level == BT_SECURITY_MEDIUM || | |
663 | sec_level == BT_SECURITY_LOW)) | |
664 | goto encrypt; | |
665 | ||
666 | /* A combination key has always sufficient security for the security | |
667 | levels 1 or 2. High security level requires the combination key | |
668 | is generated using maximum PIN code length (16). | |
669 | For pre 2.1 units. */ | |
670 | if (conn->key_type == HCI_LK_COMBINATION && | |
671 | (sec_level != BT_SECURITY_HIGH || | |
672 | conn->pin_length == 16)) | |
673 | goto encrypt; | |
674 | ||
675 | auth: | |
33060542 | 676 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend)) |
1da177e4 LT |
677 | return 0; |
678 | ||
6fdf658c LAD |
679 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
680 | return 0; | |
13d39315 WR |
681 | |
682 | encrypt: | |
683 | if (conn->link_mode & HCI_LM_ENCRYPT) | |
684 | return 1; | |
8c1b2355 | 685 | |
13d39315 | 686 | hci_conn_encrypt(conn); |
1da177e4 LT |
687 | return 0; |
688 | } | |
8c1b2355 | 689 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 690 | |
b3b1b061 WR |
691 | /* Check secure link requirement */ |
692 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
693 | { | |
694 | BT_DBG("conn %p", conn); | |
695 | ||
696 | if (sec_level != BT_SECURITY_HIGH) | |
697 | return 1; /* Accept if non-secure is required */ | |
698 | ||
ef4177e2 | 699 | if (conn->sec_level == BT_SECURITY_HIGH) |
b3b1b061 WR |
700 | return 1; |
701 | ||
702 | return 0; /* Reject not secure link */ | |
703 | } | |
704 | EXPORT_SYMBOL(hci_conn_check_secure); | |
705 | ||
1da177e4 LT |
706 | /* Change link key */ |
707 | int hci_conn_change_link_key(struct hci_conn *conn) | |
708 | { | |
709 | BT_DBG("conn %p", conn); | |
710 | ||
711 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) { | |
712 | struct hci_cp_change_conn_link_key cp; | |
aca3192c | 713 | cp.handle = cpu_to_le16(conn->handle); |
40be492f MH |
714 | hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY, |
715 | sizeof(cp), &cp); | |
1da177e4 | 716 | } |
8c1b2355 | 717 | |
1da177e4 LT |
718 | return 0; |
719 | } | |
720 | EXPORT_SYMBOL(hci_conn_change_link_key); | |
721 | ||
722 | /* Switch role */ | |
8c1b2355 | 723 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 LT |
724 | { |
725 | BT_DBG("conn %p", conn); | |
726 | ||
727 | if (!role && conn->link_mode & HCI_LM_MASTER) | |
728 | return 1; | |
729 | ||
730 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->pend)) { | |
731 | struct hci_cp_switch_role cp; | |
732 | bacpy(&cp.bdaddr, &conn->dst); | |
733 | cp.role = role; | |
a9de9248 | 734 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 735 | } |
8c1b2355 | 736 | |
1da177e4 LT |
737 | return 0; |
738 | } | |
739 | EXPORT_SYMBOL(hci_conn_switch_role); | |
740 | ||
04837f64 | 741 | /* Enter active mode */ |
14b12d0b | 742 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
743 | { |
744 | struct hci_dev *hdev = conn->hdev; | |
745 | ||
746 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
747 | ||
748 | if (test_bit(HCI_RAW, &hdev->flags)) | |
749 | return; | |
750 | ||
14b12d0b JG |
751 | if (conn->mode != HCI_CM_SNIFF) |
752 | goto timer; | |
753 | ||
754 | if (!conn->power_save && !force_active) | |
04837f64 MH |
755 | goto timer; |
756 | ||
757 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend)) { | |
758 | struct hci_cp_exit_sniff_mode cp; | |
aca3192c | 759 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 760 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
761 | } |
762 | ||
763 | timer: | |
764 | if (hdev->idle_timeout > 0) | |
765 | mod_timer(&conn->idle_timer, | |
766 | jiffies + msecs_to_jiffies(hdev->idle_timeout)); | |
767 | } | |
768 | ||
769 | /* Enter sniff mode */ | |
770 | void hci_conn_enter_sniff_mode(struct hci_conn *conn) | |
771 | { | |
772 | struct hci_dev *hdev = conn->hdev; | |
773 | ||
774 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
775 | ||
776 | if (test_bit(HCI_RAW, &hdev->flags)) | |
777 | return; | |
778 | ||
779 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) | |
780 | return; | |
781 | ||
782 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
783 | return; | |
784 | ||
785 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
786 | struct hci_cp_sniff_subrate cp; | |
aca3192c YH |
787 | cp.handle = cpu_to_le16(conn->handle); |
788 | cp.max_latency = cpu_to_le16(0); | |
789 | cp.min_remote_timeout = cpu_to_le16(0); | |
790 | cp.min_local_timeout = cpu_to_le16(0); | |
a9de9248 | 791 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); |
04837f64 MH |
792 | } |
793 | ||
794 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend)) { | |
795 | struct hci_cp_sniff_mode cp; | |
aca3192c YH |
796 | cp.handle = cpu_to_le16(conn->handle); |
797 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
798 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
799 | cp.attempt = cpu_to_le16(4); | |
800 | cp.timeout = cpu_to_le16(1); | |
a9de9248 | 801 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
802 | } |
803 | } | |
804 | ||
1da177e4 LT |
805 | /* Drop all connection on the device */ |
806 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
807 | { | |
808 | struct hci_conn_hash *h = &hdev->conn_hash; | |
809 | struct list_head *p; | |
810 | ||
811 | BT_DBG("hdev %s", hdev->name); | |
812 | ||
813 | p = h->list.next; | |
814 | while (p != &h->list) { | |
815 | struct hci_conn *c; | |
816 | ||
817 | c = list_entry(p, struct hci_conn, list); | |
818 | p = p->next; | |
819 | ||
820 | c->state = BT_CLOSED; | |
821 | ||
2950f21a | 822 | hci_proto_disconn_cfm(c, 0x16); |
1da177e4 LT |
823 | hci_conn_del(c); |
824 | } | |
825 | } | |
826 | ||
a9de9248 MH |
827 | /* Check pending connect attempts */ |
828 | void hci_conn_check_pending(struct hci_dev *hdev) | |
829 | { | |
830 | struct hci_conn *conn; | |
831 | ||
832 | BT_DBG("hdev %s", hdev->name); | |
833 | ||
834 | hci_dev_lock(hdev); | |
835 | ||
836 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
837 | if (conn) | |
838 | hci_acl_connect(conn); | |
839 | ||
840 | hci_dev_unlock(hdev); | |
841 | } | |
842 | ||
9eba32b8 MH |
843 | void hci_conn_hold_device(struct hci_conn *conn) |
844 | { | |
845 | atomic_inc(&conn->devref); | |
846 | } | |
847 | EXPORT_SYMBOL(hci_conn_hold_device); | |
848 | ||
849 | void hci_conn_put_device(struct hci_conn *conn) | |
850 | { | |
851 | if (atomic_dec_and_test(&conn->devref)) | |
852 | hci_conn_del_sysfs(conn); | |
853 | } | |
854 | EXPORT_SYMBOL(hci_conn_put_device); | |
855 | ||
1da177e4 LT |
856 | int hci_get_conn_list(void __user *arg) |
857 | { | |
858 | struct hci_conn_list_req req, *cl; | |
859 | struct hci_conn_info *ci; | |
860 | struct hci_dev *hdev; | |
861 | struct list_head *p; | |
862 | int n = 0, size, err; | |
863 | ||
864 | if (copy_from_user(&req, arg, sizeof(req))) | |
865 | return -EFAULT; | |
866 | ||
867 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
868 | return -EINVAL; | |
869 | ||
870 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
871 | ||
70f23020 AE |
872 | cl = kmalloc(size, GFP_KERNEL); |
873 | if (!cl) | |
1da177e4 LT |
874 | return -ENOMEM; |
875 | ||
70f23020 AE |
876 | hdev = hci_dev_get(req.dev_id); |
877 | if (!hdev) { | |
1da177e4 LT |
878 | kfree(cl); |
879 | return -ENODEV; | |
880 | } | |
881 | ||
882 | ci = cl->conn_info; | |
883 | ||
884 | hci_dev_lock_bh(hdev); | |
885 | list_for_each(p, &hdev->conn_hash.list) { | |
886 | register struct hci_conn *c; | |
887 | c = list_entry(p, struct hci_conn, list); | |
888 | ||
889 | bacpy(&(ci + n)->bdaddr, &c->dst); | |
890 | (ci + n)->handle = c->handle; | |
891 | (ci + n)->type = c->type; | |
892 | (ci + n)->out = c->out; | |
893 | (ci + n)->state = c->state; | |
894 | (ci + n)->link_mode = c->link_mode; | |
895 | if (++n >= req.conn_num) | |
896 | break; | |
897 | } | |
898 | hci_dev_unlock_bh(hdev); | |
899 | ||
900 | cl->dev_id = hdev->id; | |
901 | cl->conn_num = n; | |
902 | size = sizeof(req) + n * sizeof(*ci); | |
903 | ||
904 | hci_dev_put(hdev); | |
905 | ||
906 | err = copy_to_user(arg, cl, size); | |
907 | kfree(cl); | |
908 | ||
909 | return err ? -EFAULT : 0; | |
910 | } | |
911 | ||
912 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
913 | { | |
914 | struct hci_conn_info_req req; | |
915 | struct hci_conn_info ci; | |
916 | struct hci_conn *conn; | |
917 | char __user *ptr = arg + sizeof(req); | |
918 | ||
919 | if (copy_from_user(&req, arg, sizeof(req))) | |
920 | return -EFAULT; | |
921 | ||
922 | hci_dev_lock_bh(hdev); | |
923 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); | |
924 | if (conn) { | |
925 | bacpy(&ci.bdaddr, &conn->dst); | |
926 | ci.handle = conn->handle; | |
927 | ci.type = conn->type; | |
928 | ci.out = conn->out; | |
929 | ci.state = conn->state; | |
930 | ci.link_mode = conn->link_mode; | |
931 | } | |
932 | hci_dev_unlock_bh(hdev); | |
933 | ||
934 | if (!conn) | |
935 | return -ENOENT; | |
936 | ||
937 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
938 | } | |
40be492f MH |
939 | |
940 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
941 | { | |
942 | struct hci_auth_info_req req; | |
943 | struct hci_conn *conn; | |
944 | ||
945 | if (copy_from_user(&req, arg, sizeof(req))) | |
946 | return -EFAULT; | |
947 | ||
948 | hci_dev_lock_bh(hdev); | |
949 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); | |
950 | if (conn) | |
951 | req.type = conn->auth_type; | |
952 | hci_dev_unlock_bh(hdev); | |
953 | ||
954 | if (!conn) | |
955 | return -ENOENT; | |
956 | ||
957 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
958 | } |