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