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; | |
a0c808b3 | 54 | conn->out = true; |
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)); | |
0e833915 AL |
59 | cp.scan_interval = cpu_to_le16(0x0060); |
60 | cp.scan_window = cpu_to_le16(0x0030); | |
fcd89c09 | 61 | bacpy(&cp.peer_addr, &conn->dst); |
6d3ce0e7 | 62 | cp.peer_addr_type = conn->dst_type; |
0e833915 AL |
63 | cp.conn_interval_min = cpu_to_le16(0x0028); |
64 | cp.conn_interval_max = cpu_to_le16(0x0038); | |
65 | cp.supervision_timeout = cpu_to_le16(0x002a); | |
66 | cp.min_ce_len = cpu_to_le16(0x0000); | |
67 | cp.max_ce_len = cpu_to_le16(0x0000); | |
fcd89c09 VT |
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; | |
a0c808b3 | 86 | conn->out = true; |
a8746417 | 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); |
58a681ef JH |
108 | if (ie->data.ssp_mode > 0) |
109 | set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); | |
1da177e4 LT |
110 | } |
111 | ||
a8746417 | 112 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 113 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) |
b6a0dc82 | 114 | cp.role_switch = 0x01; |
1da177e4 | 115 | else |
b6a0dc82 | 116 | cp.role_switch = 0x00; |
4c67bc74 | 117 | |
a9de9248 | 118 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); |
1da177e4 LT |
119 | } |
120 | ||
6ac59344 MH |
121 | static void hci_acl_connect_cancel(struct hci_conn *conn) |
122 | { | |
123 | struct hci_cp_create_conn_cancel cp; | |
124 | ||
125 | BT_DBG("%p", conn); | |
126 | ||
d095c1eb | 127 | if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2) |
6ac59344 MH |
128 | return; |
129 | ||
130 | bacpy(&cp.bdaddr, &conn->dst); | |
a9de9248 | 131 | hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); |
6ac59344 MH |
132 | } |
133 | ||
1da177e4 LT |
134 | void hci_acl_disconn(struct hci_conn *conn, __u8 reason) |
135 | { | |
136 | struct hci_cp_disconnect cp; | |
137 | ||
138 | BT_DBG("%p", conn); | |
139 | ||
140 | conn->state = BT_DISCONN; | |
141 | ||
aca3192c | 142 | cp.handle = cpu_to_le16(conn->handle); |
1da177e4 | 143 | cp.reason = reason; |
a9de9248 | 144 | hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); |
1da177e4 LT |
145 | } |
146 | ||
147 | void hci_add_sco(struct hci_conn *conn, __u16 handle) | |
148 | { | |
149 | struct hci_dev *hdev = conn->hdev; | |
150 | struct hci_cp_add_sco cp; | |
151 | ||
152 | BT_DBG("%p", conn); | |
153 | ||
154 | conn->state = BT_CONNECT; | |
a0c808b3 | 155 | conn->out = true; |
1da177e4 | 156 | |
efc7688b MH |
157 | conn->attempt++; |
158 | ||
aca3192c | 159 | cp.handle = cpu_to_le16(handle); |
a8746417 | 160 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 161 | |
a9de9248 | 162 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); |
1da177e4 LT |
163 | } |
164 | ||
b6a0dc82 MH |
165 | void hci_setup_sync(struct hci_conn *conn, __u16 handle) |
166 | { | |
167 | struct hci_dev *hdev = conn->hdev; | |
168 | struct hci_cp_setup_sync_conn cp; | |
169 | ||
170 | BT_DBG("%p", conn); | |
171 | ||
172 | conn->state = BT_CONNECT; | |
a0c808b3 | 173 | conn->out = true; |
b6a0dc82 | 174 | |
efc7688b MH |
175 | conn->attempt++; |
176 | ||
b6a0dc82 | 177 | cp.handle = cpu_to_le16(handle); |
a8746417 | 178 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
b6a0dc82 MH |
179 | |
180 | cp.tx_bandwidth = cpu_to_le32(0x00001f40); | |
181 | cp.rx_bandwidth = cpu_to_le32(0x00001f40); | |
182 | cp.max_latency = cpu_to_le16(0xffff); | |
183 | cp.voice_setting = cpu_to_le16(hdev->voice_setting); | |
184 | cp.retrans_effort = 0xff; | |
185 | ||
186 | hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp); | |
187 | } | |
188 | ||
2ce603eb CT |
189 | void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, |
190 | u16 latency, u16 to_multiplier) | |
191 | { | |
192 | struct hci_cp_le_conn_update cp; | |
193 | struct hci_dev *hdev = conn->hdev; | |
194 | ||
195 | memset(&cp, 0, sizeof(cp)); | |
196 | ||
197 | cp.handle = cpu_to_le16(conn->handle); | |
198 | cp.conn_interval_min = cpu_to_le16(min); | |
199 | cp.conn_interval_max = cpu_to_le16(max); | |
200 | cp.conn_latency = cpu_to_le16(latency); | |
201 | cp.supervision_timeout = cpu_to_le16(to_multiplier); | |
202 | cp.min_ce_len = cpu_to_le16(0x0001); | |
203 | cp.max_ce_len = cpu_to_le16(0x0001); | |
204 | ||
205 | hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); | |
206 | } | |
207 | EXPORT_SYMBOL(hci_le_conn_update); | |
208 | ||
a7a595f6 VCG |
209 | void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8], |
210 | __u8 ltk[16]) | |
211 | { | |
212 | struct hci_dev *hdev = conn->hdev; | |
213 | struct hci_cp_le_start_enc cp; | |
214 | ||
215 | BT_DBG("%p", conn); | |
216 | ||
217 | memset(&cp, 0, sizeof(cp)); | |
218 | ||
219 | cp.handle = cpu_to_le16(conn->handle); | |
220 | memcpy(cp.ltk, ltk, sizeof(cp.ltk)); | |
221 | cp.ediv = ediv; | |
51beabdf | 222 | memcpy(cp.rand, rand, sizeof(cp.rand)); |
a7a595f6 VCG |
223 | |
224 | hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); | |
225 | } | |
226 | EXPORT_SYMBOL(hci_le_start_enc); | |
227 | ||
228 | void hci_le_ltk_reply(struct hci_conn *conn, u8 ltk[16]) | |
229 | { | |
230 | struct hci_dev *hdev = conn->hdev; | |
231 | struct hci_cp_le_ltk_reply cp; | |
232 | ||
233 | BT_DBG("%p", conn); | |
234 | ||
235 | memset(&cp, 0, sizeof(cp)); | |
236 | ||
237 | cp.handle = cpu_to_le16(conn->handle); | |
238 | memcpy(cp.ltk, ltk, sizeof(ltk)); | |
239 | ||
240 | hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp); | |
241 | } | |
242 | EXPORT_SYMBOL(hci_le_ltk_reply); | |
243 | ||
244 | void hci_le_ltk_neg_reply(struct hci_conn *conn) | |
245 | { | |
246 | struct hci_dev *hdev = conn->hdev; | |
247 | struct hci_cp_le_ltk_neg_reply cp; | |
248 | ||
249 | BT_DBG("%p", conn); | |
250 | ||
251 | memset(&cp, 0, sizeof(cp)); | |
252 | ||
253 | cp.handle = cpu_to_le16(conn->handle); | |
254 | ||
255 | hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(cp), &cp); | |
256 | } | |
257 | ||
e73439d8 MH |
258 | /* Device _must_ be locked */ |
259 | void hci_sco_setup(struct hci_conn *conn, __u8 status) | |
260 | { | |
261 | struct hci_conn *sco = conn->link; | |
262 | ||
263 | BT_DBG("%p", conn); | |
264 | ||
265 | if (!sco) | |
266 | return; | |
267 | ||
268 | if (!status) { | |
269 | if (lmp_esco_capable(conn->hdev)) | |
270 | hci_setup_sync(sco, conn->handle); | |
271 | else | |
272 | hci_add_sco(sco, conn->handle); | |
273 | } else { | |
274 | hci_proto_connect_cfm(sco, status); | |
275 | hci_conn_del(sco); | |
276 | } | |
277 | } | |
278 | ||
19c40e3b | 279 | static void hci_conn_timeout(struct work_struct *work) |
1da177e4 | 280 | { |
19c40e3b GP |
281 | struct hci_conn *conn = container_of(work, struct hci_conn, |
282 | disc_work.work); | |
2950f21a | 283 | __u8 reason; |
1da177e4 LT |
284 | |
285 | BT_DBG("conn %p state %d", conn, conn->state); | |
286 | ||
287 | if (atomic_read(&conn->refcnt)) | |
288 | return; | |
289 | ||
6ac59344 MH |
290 | switch (conn->state) { |
291 | case BT_CONNECT: | |
769be974 | 292 | case BT_CONNECT2: |
fcd89c09 VT |
293 | if (conn->out) { |
294 | if (conn->type == ACL_LINK) | |
295 | hci_acl_connect_cancel(conn); | |
296 | else if (conn->type == LE_LINK) | |
297 | hci_le_connect_cancel(conn); | |
298 | } | |
6ac59344 | 299 | break; |
769be974 | 300 | case BT_CONFIG: |
8e87d142 | 301 | case BT_CONNECTED: |
2950f21a MH |
302 | reason = hci_proto_disconn_ind(conn); |
303 | hci_acl_disconn(conn, reason); | |
6ac59344 MH |
304 | break; |
305 | default: | |
1da177e4 | 306 | conn->state = BT_CLOSED; |
6ac59344 MH |
307 | break; |
308 | } | |
1da177e4 LT |
309 | } |
310 | ||
416dc94b GP |
311 | /* Enter sniff mode */ |
312 | static void hci_conn_enter_sniff_mode(struct hci_conn *conn) | |
313 | { | |
314 | struct hci_dev *hdev = conn->hdev; | |
315 | ||
316 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
317 | ||
318 | if (test_bit(HCI_RAW, &hdev->flags)) | |
319 | return; | |
320 | ||
321 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) | |
322 | return; | |
323 | ||
324 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
325 | return; | |
326 | ||
327 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
328 | struct hci_cp_sniff_subrate cp; | |
329 | cp.handle = cpu_to_le16(conn->handle); | |
330 | cp.max_latency = cpu_to_le16(0); | |
331 | cp.min_remote_timeout = cpu_to_le16(0); | |
332 | cp.min_local_timeout = cpu_to_le16(0); | |
333 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); | |
334 | } | |
335 | ||
51a8efd7 | 336 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
416dc94b GP |
337 | struct hci_cp_sniff_mode cp; |
338 | cp.handle = cpu_to_le16(conn->handle); | |
339 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
340 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
341 | cp.attempt = cpu_to_le16(4); | |
342 | cp.timeout = cpu_to_le16(1); | |
343 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); | |
344 | } | |
345 | } | |
346 | ||
04837f64 | 347 | static void hci_conn_idle(unsigned long arg) |
1da177e4 | 348 | { |
04837f64 MH |
349 | struct hci_conn *conn = (void *) arg; |
350 | ||
351 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
352 | ||
353 | hci_conn_enter_sniff_mode(conn); | |
1da177e4 LT |
354 | } |
355 | ||
9f61656a JH |
356 | static void hci_conn_auto_accept(unsigned long arg) |
357 | { | |
358 | struct hci_conn *conn = (void *) arg; | |
359 | struct hci_dev *hdev = conn->hdev; | |
360 | ||
9f61656a JH |
361 | hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), |
362 | &conn->dst); | |
9f61656a JH |
363 | } |
364 | ||
1da177e4 LT |
365 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst) |
366 | { | |
367 | struct hci_conn *conn; | |
368 | ||
369 | BT_DBG("%s dst %s", hdev->name, batostr(dst)); | |
370 | ||
cb601d7e | 371 | conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL); |
04837f64 | 372 | if (!conn) |
1da177e4 | 373 | return NULL; |
1da177e4 LT |
374 | |
375 | bacpy(&conn->dst, dst); | |
a8746417 MH |
376 | conn->hdev = hdev; |
377 | conn->type = type; | |
378 | conn->mode = HCI_CM_ACTIVE; | |
379 | conn->state = BT_OPEN; | |
93f19c9f | 380 | conn->auth_type = HCI_AT_GENERAL_BONDING; |
17fa4b9d | 381 | conn->io_capability = hdev->io_capability; |
a9583556 | 382 | conn->remote_auth = 0xff; |
13d39315 | 383 | conn->key_type = 0xff; |
1da177e4 | 384 | |
58a681ef | 385 | set_bit(HCI_CONN_POWER_SAVE, &conn->flags); |
052b30b0 | 386 | conn->disc_timeout = HCI_DISCONN_TIMEOUT; |
04837f64 | 387 | |
a8746417 MH |
388 | switch (type) { |
389 | case ACL_LINK: | |
390 | conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; | |
391 | break; | |
392 | case SCO_LINK: | |
393 | if (lmp_esco_capable(hdev)) | |
efc7688b MH |
394 | conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | |
395 | (hdev->esco_type & EDR_ESCO_MASK); | |
a8746417 MH |
396 | else |
397 | conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; | |
398 | break; | |
399 | case ESCO_LINK: | |
efc7688b | 400 | conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; |
a8746417 MH |
401 | break; |
402 | } | |
403 | ||
1da177e4 | 404 | skb_queue_head_init(&conn->data_q); |
04837f64 | 405 | |
2c33c06a | 406 | INIT_LIST_HEAD(&conn->chan_list);; |
73d80deb | 407 | |
19c40e3b | 408 | INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout); |
b24b8a24 | 409 | setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn); |
9f61656a JH |
410 | setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept, |
411 | (unsigned long) conn); | |
1da177e4 LT |
412 | |
413 | atomic_set(&conn->refcnt, 0); | |
414 | ||
415 | hci_dev_hold(hdev); | |
416 | ||
1da177e4 | 417 | hci_conn_hash_add(hdev, conn); |
3c54711c | 418 | if (hdev->notify) |
1da177e4 LT |
419 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); |
420 | ||
9eba32b8 MH |
421 | atomic_set(&conn->devref, 0); |
422 | ||
a67e899c MH |
423 | hci_conn_init_sysfs(conn); |
424 | ||
1da177e4 LT |
425 | return conn; |
426 | } | |
427 | ||
428 | int hci_conn_del(struct hci_conn *conn) | |
429 | { | |
430 | struct hci_dev *hdev = conn->hdev; | |
431 | ||
432 | BT_DBG("%s conn %p handle %d", hdev->name, conn, conn->handle); | |
433 | ||
04837f64 MH |
434 | del_timer(&conn->idle_timer); |
435 | ||
19c40e3b | 436 | cancel_delayed_work_sync(&conn->disc_work); |
1da177e4 | 437 | |
9f61656a JH |
438 | del_timer(&conn->auto_accept_timer); |
439 | ||
5b7f9909 | 440 | if (conn->type == ACL_LINK) { |
1da177e4 LT |
441 | struct hci_conn *sco = conn->link; |
442 | if (sco) | |
443 | sco->link = NULL; | |
444 | ||
445 | /* Unacked frames */ | |
446 | hdev->acl_cnt += conn->sent; | |
6ed58ec5 VT |
447 | } else if (conn->type == LE_LINK) { |
448 | if (hdev->le_pkts) | |
449 | hdev->le_cnt += conn->sent; | |
450 | else | |
451 | hdev->acl_cnt += conn->sent; | |
5b7f9909 MH |
452 | } else { |
453 | struct hci_conn *acl = conn->link; | |
454 | if (acl) { | |
455 | acl->link = NULL; | |
456 | hci_conn_put(acl); | |
457 | } | |
1da177e4 LT |
458 | } |
459 | ||
7d0db0a3 | 460 | |
2c33c06a | 461 | hci_chan_list_flush(conn); |
73d80deb | 462 | |
1da177e4 | 463 | hci_conn_hash_del(hdev, conn); |
3c54711c | 464 | if (hdev->notify) |
1da177e4 | 465 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); |
7d0db0a3 | 466 | |
1da177e4 | 467 | skb_queue_purge(&conn->data_q); |
1da177e4 | 468 | |
9eba32b8 | 469 | hci_conn_put_device(conn); |
2ae9a6be | 470 | |
384943ec MH |
471 | hci_dev_put(hdev); |
472 | ||
163f4dab TT |
473 | if (conn->handle == 0) |
474 | kfree(conn); | |
475 | ||
1da177e4 LT |
476 | return 0; |
477 | } | |
478 | ||
479 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
480 | { | |
481 | int use_src = bacmp(src, BDADDR_ANY); | |
8035ded4 | 482 | struct hci_dev *hdev = NULL, *d; |
1da177e4 LT |
483 | |
484 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
485 | ||
f20d09d5 | 486 | read_lock(&hci_dev_list_lock); |
1da177e4 | 487 | |
8035ded4 | 488 | list_for_each_entry(d, &hci_dev_list, list) { |
1da177e4 LT |
489 | if (!test_bit(HCI_UP, &d->flags) || test_bit(HCI_RAW, &d->flags)) |
490 | continue; | |
491 | ||
8e87d142 | 492 | /* Simple routing: |
1da177e4 LT |
493 | * No source address - find interface with bdaddr != dst |
494 | * Source address - find interface with bdaddr == src | |
495 | */ | |
496 | ||
497 | if (use_src) { | |
498 | if (!bacmp(&d->bdaddr, src)) { | |
499 | hdev = d; break; | |
500 | } | |
501 | } else { | |
502 | if (bacmp(&d->bdaddr, dst)) { | |
503 | hdev = d; break; | |
504 | } | |
505 | } | |
506 | } | |
507 | ||
508 | if (hdev) | |
509 | hdev = hci_dev_hold(hdev); | |
510 | ||
f20d09d5 | 511 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
512 | return hdev; |
513 | } | |
514 | EXPORT_SYMBOL(hci_get_route); | |
515 | ||
fcd89c09 | 516 | /* Create SCO, ACL or LE connection. |
1da177e4 | 517 | * Device _must_ be locked */ |
8c1b2355 | 518 | struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, __u8 sec_level, __u8 auth_type) |
1da177e4 LT |
519 | { |
520 | struct hci_conn *acl; | |
5b7f9909 | 521 | struct hci_conn *sco; |
fcd89c09 | 522 | struct hci_conn *le; |
1da177e4 LT |
523 | |
524 | BT_DBG("%s dst %s", hdev->name, batostr(dst)); | |
525 | ||
fcd89c09 | 526 | if (type == LE_LINK) { |
eda42b50 AG |
527 | struct adv_entry *entry; |
528 | ||
fcd89c09 | 529 | le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); |
15c4794f | 530 | if (le) |
30e76272 | 531 | return ERR_PTR(-EBUSY); |
eda42b50 AG |
532 | |
533 | entry = hci_find_adv_entry(hdev, dst); | |
534 | if (!entry) | |
535 | return ERR_PTR(-EHOSTUNREACH); | |
536 | ||
15c4794f | 537 | le = hci_conn_add(hdev, LE_LINK, dst); |
fcd89c09 | 538 | if (!le) |
30e76272 | 539 | return ERR_PTR(-ENOMEM); |
893d6751 | 540 | |
eda42b50 AG |
541 | le->dst_type = entry->bdaddr_type; |
542 | ||
893d6751 | 543 | hci_le_connect(le); |
fcd89c09 VT |
544 | |
545 | hci_conn_hold(le); | |
546 | ||
547 | return le; | |
548 | } | |
549 | ||
70f23020 AE |
550 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
551 | if (!acl) { | |
552 | acl = hci_conn_add(hdev, ACL_LINK, dst); | |
553 | if (!acl) | |
1da177e4 LT |
554 | return NULL; |
555 | } | |
556 | ||
557 | hci_conn_hold(acl); | |
558 | ||
09ab6f4c | 559 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
560 | acl->sec_level = BT_SECURITY_LOW; |
561 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 562 | acl->auth_type = auth_type; |
1da177e4 | 563 | hci_acl_connect(acl); |
09ab6f4c | 564 | } |
1da177e4 | 565 | |
5b7f9909 MH |
566 | if (type == ACL_LINK) |
567 | return acl; | |
1da177e4 | 568 | |
70f23020 AE |
569 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
570 | if (!sco) { | |
571 | sco = hci_conn_add(hdev, type, dst); | |
572 | if (!sco) { | |
5b7f9909 MH |
573 | hci_conn_put(acl); |
574 | return NULL; | |
1da177e4 | 575 | } |
5b7f9909 | 576 | } |
1da177e4 | 577 | |
5b7f9909 MH |
578 | acl->link = sco; |
579 | sco->link = acl; | |
1da177e4 | 580 | |
5b7f9909 | 581 | hci_conn_hold(sco); |
1da177e4 | 582 | |
5b7f9909 | 583 | if (acl->state == BT_CONNECTED && |
b6a0dc82 | 584 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
58a681ef | 585 | set_bit(HCI_CONN_POWER_SAVE, &acl->flags); |
14b12d0b | 586 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 587 | |
51a8efd7 | 588 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { |
e73439d8 | 589 | /* defer SCO setup until mode change completed */ |
51a8efd7 | 590 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); |
e73439d8 MH |
591 | return sco; |
592 | } | |
593 | ||
594 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 595 | } |
5b7f9909 MH |
596 | |
597 | return sco; | |
1da177e4 LT |
598 | } |
599 | EXPORT_SYMBOL(hci_connect); | |
600 | ||
e7c29cb1 MH |
601 | /* Check link security requirement */ |
602 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
603 | { | |
604 | BT_DBG("conn %p", conn); | |
605 | ||
aa64a8b5 | 606 | if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT)) |
e7c29cb1 MH |
607 | return 0; |
608 | ||
609 | return 1; | |
610 | } | |
611 | EXPORT_SYMBOL(hci_conn_check_link_mode); | |
612 | ||
1da177e4 | 613 | /* Authenticate remote device */ |
0684e5f9 | 614 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 LT |
615 | { |
616 | BT_DBG("conn %p", conn); | |
617 | ||
765c2a96 JH |
618 | if (conn->pending_sec_level > sec_level) |
619 | sec_level = conn->pending_sec_level; | |
620 | ||
96a31833 | 621 | if (sec_level > conn->sec_level) |
765c2a96 | 622 | conn->pending_sec_level = sec_level; |
96a31833 | 623 | else if (conn->link_mode & HCI_LM_AUTH) |
1da177e4 LT |
624 | return 1; |
625 | ||
65cf686e JH |
626 | /* Make sure we preserve an existing MITM requirement*/ |
627 | auth_type |= (conn->auth_type & 0x01); | |
628 | ||
96a31833 MH |
629 | conn->auth_type = auth_type; |
630 | ||
51a8efd7 | 631 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 632 | struct hci_cp_auth_requested cp; |
aca3192c | 633 | cp.handle = cpu_to_le16(conn->handle); |
40be492f MH |
634 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
635 | sizeof(cp), &cp); | |
19f8def0 | 636 | if (conn->key_type != 0xff) |
51a8efd7 | 637 | set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); |
1da177e4 | 638 | } |
8c1b2355 | 639 | |
1da177e4 LT |
640 | return 0; |
641 | } | |
1da177e4 | 642 | |
13d39315 WR |
643 | /* Encrypt the the link */ |
644 | static void hci_conn_encrypt(struct hci_conn *conn) | |
645 | { | |
646 | BT_DBG("conn %p", conn); | |
647 | ||
51a8efd7 | 648 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { |
13d39315 WR |
649 | struct hci_cp_set_conn_encrypt cp; |
650 | cp.handle = cpu_to_le16(conn->handle); | |
651 | cp.encrypt = 0x01; | |
652 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
653 | &cp); | |
654 | } | |
655 | } | |
656 | ||
8c1b2355 | 657 | /* Enable security */ |
0684e5f9 | 658 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 LT |
659 | { |
660 | BT_DBG("conn %p", conn); | |
661 | ||
13d39315 | 662 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
663 | if (sec_level == BT_SECURITY_SDP) |
664 | return 1; | |
665 | ||
13d39315 WR |
666 | /* For non 2.1 devices and low security level we don't need the link |
667 | key. */ | |
aa64a8b5 | 668 | if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) |
3fdca1e1 | 669 | return 1; |
8c1b2355 | 670 | |
13d39315 WR |
671 | /* For other security levels we need the link key. */ |
672 | if (!(conn->link_mode & HCI_LM_AUTH)) | |
673 | goto auth; | |
674 | ||
675 | /* An authenticated combination key has sufficient security for any | |
676 | security level. */ | |
677 | if (conn->key_type == HCI_LK_AUTH_COMBINATION) | |
678 | goto encrypt; | |
679 | ||
680 | /* An unauthenticated combination key has sufficient security for | |
681 | security level 1 and 2. */ | |
682 | if (conn->key_type == HCI_LK_UNAUTH_COMBINATION && | |
683 | (sec_level == BT_SECURITY_MEDIUM || | |
684 | sec_level == BT_SECURITY_LOW)) | |
685 | goto encrypt; | |
686 | ||
687 | /* A combination key has always sufficient security for the security | |
688 | levels 1 or 2. High security level requires the combination key | |
689 | is generated using maximum PIN code length (16). | |
690 | For pre 2.1 units. */ | |
691 | if (conn->key_type == HCI_LK_COMBINATION && | |
692 | (sec_level != BT_SECURITY_HIGH || | |
693 | conn->pin_length == 16)) | |
694 | goto encrypt; | |
695 | ||
696 | auth: | |
51a8efd7 | 697 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) |
1da177e4 LT |
698 | return 0; |
699 | ||
6fdf658c LAD |
700 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
701 | return 0; | |
13d39315 WR |
702 | |
703 | encrypt: | |
704 | if (conn->link_mode & HCI_LM_ENCRYPT) | |
705 | return 1; | |
8c1b2355 | 706 | |
13d39315 | 707 | hci_conn_encrypt(conn); |
1da177e4 LT |
708 | return 0; |
709 | } | |
8c1b2355 | 710 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 711 | |
b3b1b061 WR |
712 | /* Check secure link requirement */ |
713 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
714 | { | |
715 | BT_DBG("conn %p", conn); | |
716 | ||
717 | if (sec_level != BT_SECURITY_HIGH) | |
718 | return 1; /* Accept if non-secure is required */ | |
719 | ||
ef4177e2 | 720 | if (conn->sec_level == BT_SECURITY_HIGH) |
b3b1b061 WR |
721 | return 1; |
722 | ||
723 | return 0; /* Reject not secure link */ | |
724 | } | |
725 | EXPORT_SYMBOL(hci_conn_check_secure); | |
726 | ||
1da177e4 LT |
727 | /* Change link key */ |
728 | int hci_conn_change_link_key(struct hci_conn *conn) | |
729 | { | |
730 | BT_DBG("conn %p", conn); | |
731 | ||
51a8efd7 | 732 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 733 | struct hci_cp_change_conn_link_key cp; |
aca3192c | 734 | cp.handle = cpu_to_le16(conn->handle); |
40be492f MH |
735 | hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY, |
736 | sizeof(cp), &cp); | |
1da177e4 | 737 | } |
8c1b2355 | 738 | |
1da177e4 LT |
739 | return 0; |
740 | } | |
741 | EXPORT_SYMBOL(hci_conn_change_link_key); | |
742 | ||
743 | /* Switch role */ | |
8c1b2355 | 744 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 LT |
745 | { |
746 | BT_DBG("conn %p", conn); | |
747 | ||
748 | if (!role && conn->link_mode & HCI_LM_MASTER) | |
749 | return 1; | |
750 | ||
51a8efd7 | 751 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { |
1da177e4 LT |
752 | struct hci_cp_switch_role cp; |
753 | bacpy(&cp.bdaddr, &conn->dst); | |
754 | cp.role = role; | |
a9de9248 | 755 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 756 | } |
8c1b2355 | 757 | |
1da177e4 LT |
758 | return 0; |
759 | } | |
760 | EXPORT_SYMBOL(hci_conn_switch_role); | |
761 | ||
04837f64 | 762 | /* Enter active mode */ |
14b12d0b | 763 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
764 | { |
765 | struct hci_dev *hdev = conn->hdev; | |
766 | ||
767 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
768 | ||
769 | if (test_bit(HCI_RAW, &hdev->flags)) | |
770 | return; | |
771 | ||
14b12d0b JG |
772 | if (conn->mode != HCI_CM_SNIFF) |
773 | goto timer; | |
774 | ||
58a681ef | 775 | if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) |
04837f64 MH |
776 | goto timer; |
777 | ||
51a8efd7 | 778 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
04837f64 | 779 | struct hci_cp_exit_sniff_mode cp; |
aca3192c | 780 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 781 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
782 | } |
783 | ||
784 | timer: | |
785 | if (hdev->idle_timeout > 0) | |
786 | mod_timer(&conn->idle_timer, | |
787 | jiffies + msecs_to_jiffies(hdev->idle_timeout)); | |
788 | } | |
789 | ||
1da177e4 LT |
790 | /* Drop all connection on the device */ |
791 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
792 | { | |
793 | struct hci_conn_hash *h = &hdev->conn_hash; | |
3e9c40a6 | 794 | struct hci_conn *c; |
1da177e4 LT |
795 | |
796 | BT_DBG("hdev %s", hdev->name); | |
797 | ||
bf4c6325 | 798 | list_for_each_entry_rcu(c, &h->list, list) { |
1da177e4 LT |
799 | c->state = BT_CLOSED; |
800 | ||
9f5a0d7b | 801 | hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); |
1da177e4 LT |
802 | hci_conn_del(c); |
803 | } | |
804 | } | |
805 | ||
a9de9248 MH |
806 | /* Check pending connect attempts */ |
807 | void hci_conn_check_pending(struct hci_dev *hdev) | |
808 | { | |
809 | struct hci_conn *conn; | |
810 | ||
811 | BT_DBG("hdev %s", hdev->name); | |
812 | ||
813 | hci_dev_lock(hdev); | |
814 | ||
815 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
816 | if (conn) | |
817 | hci_acl_connect(conn); | |
818 | ||
819 | hci_dev_unlock(hdev); | |
820 | } | |
821 | ||
9eba32b8 MH |
822 | void hci_conn_hold_device(struct hci_conn *conn) |
823 | { | |
824 | atomic_inc(&conn->devref); | |
825 | } | |
826 | EXPORT_SYMBOL(hci_conn_hold_device); | |
827 | ||
828 | void hci_conn_put_device(struct hci_conn *conn) | |
829 | { | |
830 | if (atomic_dec_and_test(&conn->devref)) | |
831 | hci_conn_del_sysfs(conn); | |
832 | } | |
833 | EXPORT_SYMBOL(hci_conn_put_device); | |
834 | ||
1da177e4 LT |
835 | int hci_get_conn_list(void __user *arg) |
836 | { | |
8035ded4 | 837 | register struct hci_conn *c; |
1da177e4 LT |
838 | struct hci_conn_list_req req, *cl; |
839 | struct hci_conn_info *ci; | |
840 | struct hci_dev *hdev; | |
1da177e4 LT |
841 | int n = 0, size, err; |
842 | ||
843 | if (copy_from_user(&req, arg, sizeof(req))) | |
844 | return -EFAULT; | |
845 | ||
846 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
847 | return -EINVAL; | |
848 | ||
849 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
850 | ||
70f23020 AE |
851 | cl = kmalloc(size, GFP_KERNEL); |
852 | if (!cl) | |
1da177e4 LT |
853 | return -ENOMEM; |
854 | ||
70f23020 AE |
855 | hdev = hci_dev_get(req.dev_id); |
856 | if (!hdev) { | |
1da177e4 LT |
857 | kfree(cl); |
858 | return -ENODEV; | |
859 | } | |
860 | ||
861 | ci = cl->conn_info; | |
862 | ||
09fd0de5 | 863 | hci_dev_lock(hdev); |
8035ded4 | 864 | list_for_each_entry(c, &hdev->conn_hash.list, list) { |
1da177e4 LT |
865 | bacpy(&(ci + n)->bdaddr, &c->dst); |
866 | (ci + n)->handle = c->handle; | |
867 | (ci + n)->type = c->type; | |
868 | (ci + n)->out = c->out; | |
869 | (ci + n)->state = c->state; | |
870 | (ci + n)->link_mode = c->link_mode; | |
871 | if (++n >= req.conn_num) | |
872 | break; | |
873 | } | |
09fd0de5 | 874 | hci_dev_unlock(hdev); |
1da177e4 LT |
875 | |
876 | cl->dev_id = hdev->id; | |
877 | cl->conn_num = n; | |
878 | size = sizeof(req) + n * sizeof(*ci); | |
879 | ||
880 | hci_dev_put(hdev); | |
881 | ||
882 | err = copy_to_user(arg, cl, size); | |
883 | kfree(cl); | |
884 | ||
885 | return err ? -EFAULT : 0; | |
886 | } | |
887 | ||
888 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
889 | { | |
890 | struct hci_conn_info_req req; | |
891 | struct hci_conn_info ci; | |
892 | struct hci_conn *conn; | |
893 | char __user *ptr = arg + sizeof(req); | |
894 | ||
895 | if (copy_from_user(&req, arg, sizeof(req))) | |
896 | return -EFAULT; | |
897 | ||
09fd0de5 | 898 | hci_dev_lock(hdev); |
1da177e4 LT |
899 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); |
900 | if (conn) { | |
901 | bacpy(&ci.bdaddr, &conn->dst); | |
902 | ci.handle = conn->handle; | |
903 | ci.type = conn->type; | |
904 | ci.out = conn->out; | |
905 | ci.state = conn->state; | |
906 | ci.link_mode = conn->link_mode; | |
907 | } | |
09fd0de5 | 908 | hci_dev_unlock(hdev); |
1da177e4 LT |
909 | |
910 | if (!conn) | |
911 | return -ENOENT; | |
912 | ||
913 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
914 | } | |
40be492f MH |
915 | |
916 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
917 | { | |
918 | struct hci_auth_info_req req; | |
919 | struct hci_conn *conn; | |
920 | ||
921 | if (copy_from_user(&req, arg, sizeof(req))) | |
922 | return -EFAULT; | |
923 | ||
09fd0de5 | 924 | hci_dev_lock(hdev); |
40be492f MH |
925 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); |
926 | if (conn) | |
927 | req.type = conn->auth_type; | |
09fd0de5 | 928 | hci_dev_unlock(hdev); |
40be492f MH |
929 | |
930 | if (!conn) | |
931 | return -ENOENT; | |
932 | ||
933 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
934 | } | |
73d80deb LAD |
935 | |
936 | struct hci_chan *hci_chan_create(struct hci_conn *conn) | |
937 | { | |
938 | struct hci_dev *hdev = conn->hdev; | |
939 | struct hci_chan *chan; | |
940 | ||
941 | BT_DBG("%s conn %p", hdev->name, conn); | |
942 | ||
75d7735c | 943 | chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL); |
73d80deb LAD |
944 | if (!chan) |
945 | return NULL; | |
946 | ||
947 | chan->conn = conn; | |
948 | skb_queue_head_init(&chan->data_q); | |
949 | ||
8192edef | 950 | list_add_rcu(&chan->list, &conn->chan_list); |
73d80deb LAD |
951 | |
952 | return chan; | |
953 | } | |
954 | ||
955 | int hci_chan_del(struct hci_chan *chan) | |
956 | { | |
957 | struct hci_conn *conn = chan->conn; | |
958 | struct hci_dev *hdev = conn->hdev; | |
959 | ||
960 | BT_DBG("%s conn %p chan %p", hdev->name, conn, chan); | |
961 | ||
8192edef GP |
962 | list_del_rcu(&chan->list); |
963 | ||
964 | synchronize_rcu(); | |
73d80deb LAD |
965 | |
966 | skb_queue_purge(&chan->data_q); | |
967 | kfree(chan); | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
2c33c06a | 972 | void hci_chan_list_flush(struct hci_conn *conn) |
73d80deb | 973 | { |
8192edef | 974 | struct hci_chan *chan; |
73d80deb LAD |
975 | |
976 | BT_DBG("conn %p", conn); | |
977 | ||
8192edef | 978 | list_for_each_entry_rcu(chan, &conn->chan_list, list) |
73d80deb LAD |
979 | hci_chan_del(chan); |
980 | } |