Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 | 2 | BlueZ - Bluetooth protocol stack for Linux |
2d0a0346 | 3 | Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved. |
1da177e4 LT |
4 | |
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth HCI connection handling. */ | |
26 | ||
8c520a59 | 27 | #include <linux/export.h> |
1da177e4 LT |
28 | |
29 | #include <net/bluetooth/bluetooth.h> | |
30 | #include <net/bluetooth/hci_core.h> | |
9740e49d | 31 | #include <net/bluetooth/a2mp.h> |
1da177e4 | 32 | |
fcd89c09 VT |
33 | static void hci_le_connect(struct hci_conn *conn) |
34 | { | |
35 | struct hci_dev *hdev = conn->hdev; | |
36 | struct hci_cp_le_create_conn cp; | |
37 | ||
38 | conn->state = BT_CONNECT; | |
a0c808b3 | 39 | conn->out = true; |
b92a6223 | 40 | conn->link_mode |= HCI_LM_MASTER; |
7b5c0d52 | 41 | conn->sec_level = BT_SECURITY_LOW; |
fcd89c09 VT |
42 | |
43 | memset(&cp, 0, sizeof(cp)); | |
82781e63 AE |
44 | cp.scan_interval = __constant_cpu_to_le16(0x0060); |
45 | cp.scan_window = __constant_cpu_to_le16(0x0030); | |
fcd89c09 | 46 | bacpy(&cp.peer_addr, &conn->dst); |
6d3ce0e7 | 47 | cp.peer_addr_type = conn->dst_type; |
82781e63 AE |
48 | cp.conn_interval_min = __constant_cpu_to_le16(0x0028); |
49 | cp.conn_interval_max = __constant_cpu_to_le16(0x0038); | |
50 | cp.supervision_timeout = __constant_cpu_to_le16(0x002a); | |
51 | cp.min_ce_len = __constant_cpu_to_le16(0x0000); | |
52 | cp.max_ce_len = __constant_cpu_to_le16(0x0000); | |
fcd89c09 VT |
53 | |
54 | hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); | |
55 | } | |
56 | ||
57 | static void hci_le_connect_cancel(struct hci_conn *conn) | |
58 | { | |
59 | hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); | |
60 | } | |
61 | ||
4c67bc74 | 62 | void hci_acl_connect(struct hci_conn *conn) |
1da177e4 LT |
63 | { |
64 | struct hci_dev *hdev = conn->hdev; | |
65 | struct inquiry_entry *ie; | |
66 | struct hci_cp_create_conn cp; | |
67 | ||
42d2d87c | 68 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
69 | |
70 | conn->state = BT_CONNECT; | |
a0c808b3 | 71 | conn->out = true; |
a8746417 | 72 | |
1da177e4 LT |
73 | conn->link_mode = HCI_LM_MASTER; |
74 | ||
4c67bc74 MH |
75 | conn->attempt++; |
76 | ||
e4e8e37c MH |
77 | conn->link_policy = hdev->link_policy; |
78 | ||
1da177e4 LT |
79 | memset(&cp, 0, sizeof(cp)); |
80 | bacpy(&cp.bdaddr, &conn->dst); | |
81 | cp.pscan_rep_mode = 0x02; | |
82 | ||
70f23020 AE |
83 | ie = hci_inquiry_cache_lookup(hdev, &conn->dst); |
84 | if (ie) { | |
41a96212 MH |
85 | if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { |
86 | cp.pscan_rep_mode = ie->data.pscan_rep_mode; | |
87 | cp.pscan_mode = ie->data.pscan_mode; | |
88 | cp.clock_offset = ie->data.clock_offset | | |
82781e63 | 89 | __constant_cpu_to_le16(0x8000); |
41a96212 MH |
90 | } |
91 | ||
1da177e4 | 92 | memcpy(conn->dev_class, ie->data.dev_class, 3); |
58a681ef JH |
93 | if (ie->data.ssp_mode > 0) |
94 | set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); | |
1da177e4 LT |
95 | } |
96 | ||
a8746417 | 97 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 98 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) |
b6a0dc82 | 99 | cp.role_switch = 0x01; |
1da177e4 | 100 | else |
b6a0dc82 | 101 | cp.role_switch = 0x00; |
4c67bc74 | 102 | |
a9de9248 | 103 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); |
1da177e4 LT |
104 | } |
105 | ||
6ac59344 MH |
106 | static void hci_acl_connect_cancel(struct hci_conn *conn) |
107 | { | |
108 | struct hci_cp_create_conn_cancel cp; | |
109 | ||
110 | BT_DBG("%p", conn); | |
111 | ||
d095c1eb | 112 | if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2) |
6ac59344 MH |
113 | return; |
114 | ||
115 | bacpy(&cp.bdaddr, &conn->dst); | |
a9de9248 | 116 | hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); |
6ac59344 MH |
117 | } |
118 | ||
1da177e4 LT |
119 | void hci_acl_disconn(struct hci_conn *conn, __u8 reason) |
120 | { | |
121 | struct hci_cp_disconnect cp; | |
122 | ||
123 | BT_DBG("%p", conn); | |
124 | ||
125 | conn->state = BT_DISCONN; | |
126 | ||
aca3192c | 127 | cp.handle = cpu_to_le16(conn->handle); |
1da177e4 | 128 | cp.reason = reason; |
a9de9248 | 129 | hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); |
1da177e4 LT |
130 | } |
131 | ||
132 | void hci_add_sco(struct hci_conn *conn, __u16 handle) | |
133 | { | |
134 | struct hci_dev *hdev = conn->hdev; | |
135 | struct hci_cp_add_sco cp; | |
136 | ||
137 | BT_DBG("%p", conn); | |
138 | ||
139 | conn->state = BT_CONNECT; | |
a0c808b3 | 140 | conn->out = true; |
1da177e4 | 141 | |
efc7688b MH |
142 | conn->attempt++; |
143 | ||
aca3192c | 144 | cp.handle = cpu_to_le16(handle); |
a8746417 | 145 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 146 | |
a9de9248 | 147 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); |
1da177e4 LT |
148 | } |
149 | ||
b6a0dc82 MH |
150 | void hci_setup_sync(struct hci_conn *conn, __u16 handle) |
151 | { | |
152 | struct hci_dev *hdev = conn->hdev; | |
153 | struct hci_cp_setup_sync_conn cp; | |
154 | ||
155 | BT_DBG("%p", conn); | |
156 | ||
157 | conn->state = BT_CONNECT; | |
a0c808b3 | 158 | conn->out = true; |
b6a0dc82 | 159 | |
efc7688b MH |
160 | conn->attempt++; |
161 | ||
b6a0dc82 | 162 | cp.handle = cpu_to_le16(handle); |
a8746417 | 163 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
b6a0dc82 | 164 | |
82781e63 AE |
165 | cp.tx_bandwidth = __constant_cpu_to_le32(0x00001f40); |
166 | cp.rx_bandwidth = __constant_cpu_to_le32(0x00001f40); | |
167 | cp.max_latency = __constant_cpu_to_le16(0xffff); | |
b6a0dc82 MH |
168 | cp.voice_setting = cpu_to_le16(hdev->voice_setting); |
169 | cp.retrans_effort = 0xff; | |
170 | ||
171 | hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp); | |
172 | } | |
173 | ||
2ce603eb | 174 | void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, |
5974e4c4 | 175 | u16 latency, u16 to_multiplier) |
2ce603eb CT |
176 | { |
177 | struct hci_cp_le_conn_update cp; | |
178 | struct hci_dev *hdev = conn->hdev; | |
179 | ||
180 | memset(&cp, 0, sizeof(cp)); | |
181 | ||
182 | cp.handle = cpu_to_le16(conn->handle); | |
183 | cp.conn_interval_min = cpu_to_le16(min); | |
184 | cp.conn_interval_max = cpu_to_le16(max); | |
185 | cp.conn_latency = cpu_to_le16(latency); | |
186 | cp.supervision_timeout = cpu_to_le16(to_multiplier); | |
82781e63 AE |
187 | cp.min_ce_len = __constant_cpu_to_le16(0x0001); |
188 | cp.max_ce_len = __constant_cpu_to_le16(0x0001); | |
2ce603eb CT |
189 | |
190 | hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); | |
191 | } | |
2ce603eb | 192 | |
a7a595f6 | 193 | void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8], |
5974e4c4 | 194 | __u8 ltk[16]) |
a7a595f6 VCG |
195 | { |
196 | struct hci_dev *hdev = conn->hdev; | |
197 | struct hci_cp_le_start_enc cp; | |
198 | ||
199 | BT_DBG("%p", conn); | |
200 | ||
201 | memset(&cp, 0, sizeof(cp)); | |
202 | ||
203 | cp.handle = cpu_to_le16(conn->handle); | |
204 | memcpy(cp.ltk, ltk, sizeof(cp.ltk)); | |
205 | cp.ediv = ediv; | |
51beabdf | 206 | memcpy(cp.rand, rand, sizeof(cp.rand)); |
a7a595f6 VCG |
207 | |
208 | hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); | |
209 | } | |
a7a595f6 | 210 | |
e73439d8 MH |
211 | /* Device _must_ be locked */ |
212 | void hci_sco_setup(struct hci_conn *conn, __u8 status) | |
213 | { | |
214 | struct hci_conn *sco = conn->link; | |
215 | ||
216 | BT_DBG("%p", conn); | |
217 | ||
218 | if (!sco) | |
219 | return; | |
220 | ||
221 | if (!status) { | |
222 | if (lmp_esco_capable(conn->hdev)) | |
223 | hci_setup_sync(sco, conn->handle); | |
224 | else | |
225 | hci_add_sco(sco, conn->handle); | |
226 | } else { | |
227 | hci_proto_connect_cfm(sco, status); | |
228 | hci_conn_del(sco); | |
229 | } | |
230 | } | |
231 | ||
19c40e3b | 232 | static void hci_conn_timeout(struct work_struct *work) |
1da177e4 | 233 | { |
19c40e3b | 234 | struct hci_conn *conn = container_of(work, struct hci_conn, |
5974e4c4 | 235 | disc_work.work); |
2950f21a | 236 | __u8 reason; |
1da177e4 | 237 | |
e05dcc32 | 238 | BT_DBG("conn %p state %s", conn, state_to_string(conn->state)); |
1da177e4 LT |
239 | |
240 | if (atomic_read(&conn->refcnt)) | |
241 | return; | |
242 | ||
6ac59344 MH |
243 | switch (conn->state) { |
244 | case BT_CONNECT: | |
769be974 | 245 | case BT_CONNECT2: |
fcd89c09 VT |
246 | if (conn->out) { |
247 | if (conn->type == ACL_LINK) | |
248 | hci_acl_connect_cancel(conn); | |
249 | else if (conn->type == LE_LINK) | |
250 | hci_le_connect_cancel(conn); | |
251 | } | |
6ac59344 | 252 | break; |
769be974 | 253 | case BT_CONFIG: |
8e87d142 | 254 | case BT_CONNECTED: |
2950f21a MH |
255 | reason = hci_proto_disconn_ind(conn); |
256 | hci_acl_disconn(conn, reason); | |
6ac59344 MH |
257 | break; |
258 | default: | |
1da177e4 | 259 | conn->state = BT_CLOSED; |
6ac59344 MH |
260 | break; |
261 | } | |
1da177e4 LT |
262 | } |
263 | ||
416dc94b GP |
264 | /* Enter sniff mode */ |
265 | static void hci_conn_enter_sniff_mode(struct hci_conn *conn) | |
266 | { | |
267 | struct hci_dev *hdev = conn->hdev; | |
268 | ||
269 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
270 | ||
271 | if (test_bit(HCI_RAW, &hdev->flags)) | |
272 | return; | |
273 | ||
274 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) | |
275 | return; | |
276 | ||
277 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
278 | return; | |
279 | ||
280 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
281 | struct hci_cp_sniff_subrate cp; | |
282 | cp.handle = cpu_to_le16(conn->handle); | |
82781e63 AE |
283 | cp.max_latency = __constant_cpu_to_le16(0); |
284 | cp.min_remote_timeout = __constant_cpu_to_le16(0); | |
285 | cp.min_local_timeout = __constant_cpu_to_le16(0); | |
416dc94b GP |
286 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); |
287 | } | |
288 | ||
51a8efd7 | 289 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
416dc94b GP |
290 | struct hci_cp_sniff_mode cp; |
291 | cp.handle = cpu_to_le16(conn->handle); | |
292 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
293 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
82781e63 AE |
294 | cp.attempt = __constant_cpu_to_le16(4); |
295 | cp.timeout = __constant_cpu_to_le16(1); | |
416dc94b GP |
296 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); |
297 | } | |
298 | } | |
299 | ||
04837f64 | 300 | static void hci_conn_idle(unsigned long arg) |
1da177e4 | 301 | { |
04837f64 MH |
302 | struct hci_conn *conn = (void *) arg; |
303 | ||
304 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
305 | ||
306 | hci_conn_enter_sniff_mode(conn); | |
1da177e4 LT |
307 | } |
308 | ||
9f61656a JH |
309 | static void hci_conn_auto_accept(unsigned long arg) |
310 | { | |
311 | struct hci_conn *conn = (void *) arg; | |
312 | struct hci_dev *hdev = conn->hdev; | |
313 | ||
9f61656a | 314 | hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), |
5974e4c4 | 315 | &conn->dst); |
9f61656a JH |
316 | } |
317 | ||
1da177e4 LT |
318 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst) |
319 | { | |
320 | struct hci_conn *conn; | |
321 | ||
322 | BT_DBG("%s dst %s", hdev->name, batostr(dst)); | |
323 | ||
cb601d7e | 324 | conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL); |
04837f64 | 325 | if (!conn) |
1da177e4 | 326 | return NULL; |
1da177e4 LT |
327 | |
328 | bacpy(&conn->dst, dst); | |
a8746417 MH |
329 | conn->hdev = hdev; |
330 | conn->type = type; | |
331 | conn->mode = HCI_CM_ACTIVE; | |
332 | conn->state = BT_OPEN; | |
93f19c9f | 333 | conn->auth_type = HCI_AT_GENERAL_BONDING; |
17fa4b9d | 334 | conn->io_capability = hdev->io_capability; |
a9583556 | 335 | conn->remote_auth = 0xff; |
13d39315 | 336 | conn->key_type = 0xff; |
1da177e4 | 337 | |
58a681ef | 338 | set_bit(HCI_CONN_POWER_SAVE, &conn->flags); |
052b30b0 | 339 | conn->disc_timeout = HCI_DISCONN_TIMEOUT; |
04837f64 | 340 | |
a8746417 MH |
341 | switch (type) { |
342 | case ACL_LINK: | |
343 | conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; | |
344 | break; | |
345 | case SCO_LINK: | |
346 | if (lmp_esco_capable(hdev)) | |
efc7688b MH |
347 | conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | |
348 | (hdev->esco_type & EDR_ESCO_MASK); | |
a8746417 MH |
349 | else |
350 | conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; | |
351 | break; | |
352 | case ESCO_LINK: | |
efc7688b | 353 | conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; |
a8746417 MH |
354 | break; |
355 | } | |
356 | ||
1da177e4 | 357 | skb_queue_head_init(&conn->data_q); |
04837f64 | 358 | |
70c1f20b | 359 | INIT_LIST_HEAD(&conn->chan_list); |
73d80deb | 360 | |
19c40e3b | 361 | INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout); |
b24b8a24 | 362 | setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn); |
9f61656a | 363 | setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept, |
5974e4c4 | 364 | (unsigned long) conn); |
1da177e4 LT |
365 | |
366 | atomic_set(&conn->refcnt, 0); | |
367 | ||
368 | hci_dev_hold(hdev); | |
369 | ||
1da177e4 | 370 | hci_conn_hash_add(hdev, conn); |
3c54711c | 371 | if (hdev->notify) |
1da177e4 LT |
372 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); |
373 | ||
9eba32b8 MH |
374 | atomic_set(&conn->devref, 0); |
375 | ||
a67e899c MH |
376 | hci_conn_init_sysfs(conn); |
377 | ||
1da177e4 LT |
378 | return conn; |
379 | } | |
380 | ||
381 | int hci_conn_del(struct hci_conn *conn) | |
382 | { | |
383 | struct hci_dev *hdev = conn->hdev; | |
384 | ||
385 | BT_DBG("%s conn %p handle %d", hdev->name, conn, conn->handle); | |
386 | ||
04837f64 MH |
387 | del_timer(&conn->idle_timer); |
388 | ||
19c40e3b | 389 | cancel_delayed_work_sync(&conn->disc_work); |
1da177e4 | 390 | |
9f61656a JH |
391 | del_timer(&conn->auto_accept_timer); |
392 | ||
5b7f9909 | 393 | if (conn->type == ACL_LINK) { |
1da177e4 LT |
394 | struct hci_conn *sco = conn->link; |
395 | if (sco) | |
396 | sco->link = NULL; | |
397 | ||
398 | /* Unacked frames */ | |
399 | hdev->acl_cnt += conn->sent; | |
6ed58ec5 VT |
400 | } else if (conn->type == LE_LINK) { |
401 | if (hdev->le_pkts) | |
402 | hdev->le_cnt += conn->sent; | |
403 | else | |
404 | hdev->acl_cnt += conn->sent; | |
5b7f9909 MH |
405 | } else { |
406 | struct hci_conn *acl = conn->link; | |
407 | if (acl) { | |
408 | acl->link = NULL; | |
409 | hci_conn_put(acl); | |
410 | } | |
1da177e4 LT |
411 | } |
412 | ||
2c33c06a | 413 | hci_chan_list_flush(conn); |
73d80deb | 414 | |
9740e49d AE |
415 | if (conn->amp_mgr) |
416 | amp_mgr_put(conn->amp_mgr); | |
417 | ||
1da177e4 | 418 | hci_conn_hash_del(hdev, conn); |
3c54711c | 419 | if (hdev->notify) |
1da177e4 | 420 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); |
7d0db0a3 | 421 | |
1da177e4 | 422 | skb_queue_purge(&conn->data_q); |
1da177e4 | 423 | |
9eba32b8 | 424 | hci_conn_put_device(conn); |
2ae9a6be | 425 | |
384943ec MH |
426 | hci_dev_put(hdev); |
427 | ||
163f4dab TT |
428 | if (conn->handle == 0) |
429 | kfree(conn); | |
430 | ||
1da177e4 LT |
431 | return 0; |
432 | } | |
433 | ||
434 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
435 | { | |
436 | int use_src = bacmp(src, BDADDR_ANY); | |
8035ded4 | 437 | struct hci_dev *hdev = NULL, *d; |
1da177e4 LT |
438 | |
439 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
440 | ||
f20d09d5 | 441 | read_lock(&hci_dev_list_lock); |
1da177e4 | 442 | |
8035ded4 | 443 | list_for_each_entry(d, &hci_dev_list, list) { |
8fc9ced3 GP |
444 | if (!test_bit(HCI_UP, &d->flags) || |
445 | test_bit(HCI_RAW, &d->flags)) | |
1da177e4 LT |
446 | continue; |
447 | ||
8e87d142 | 448 | /* Simple routing: |
1da177e4 LT |
449 | * No source address - find interface with bdaddr != dst |
450 | * Source address - find interface with bdaddr == src | |
451 | */ | |
452 | ||
453 | if (use_src) { | |
454 | if (!bacmp(&d->bdaddr, src)) { | |
455 | hdev = d; break; | |
456 | } | |
457 | } else { | |
458 | if (bacmp(&d->bdaddr, dst)) { | |
459 | hdev = d; break; | |
460 | } | |
461 | } | |
462 | } | |
463 | ||
464 | if (hdev) | |
465 | hdev = hci_dev_hold(hdev); | |
466 | ||
f20d09d5 | 467 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
468 | return hdev; |
469 | } | |
470 | EXPORT_SYMBOL(hci_get_route); | |
471 | ||
fcd89c09 | 472 | /* Create SCO, ACL or LE connection. |
1da177e4 | 473 | * Device _must_ be locked */ |
b12f62cf AG |
474 | struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, |
475 | __u8 dst_type, __u8 sec_level, __u8 auth_type) | |
1da177e4 LT |
476 | { |
477 | struct hci_conn *acl; | |
5b7f9909 | 478 | struct hci_conn *sco; |
fcd89c09 | 479 | struct hci_conn *le; |
1da177e4 LT |
480 | |
481 | BT_DBG("%s dst %s", hdev->name, batostr(dst)); | |
482 | ||
fcd89c09 VT |
483 | if (type == LE_LINK) { |
484 | le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); | |
9f0caeb1 | 485 | if (!le) { |
9f0caeb1 VCG |
486 | le = hci_conn_add(hdev, LE_LINK, dst); |
487 | if (!le) | |
488 | return ERR_PTR(-ENOMEM); | |
489 | ||
b12f62cf | 490 | le->dst_type = bdaddr_to_le(dst_type); |
9f0caeb1 VCG |
491 | hci_le_connect(le); |
492 | } | |
eda42b50 | 493 | |
9f0caeb1 VCG |
494 | le->pending_sec_level = sec_level; |
495 | le->auth_type = auth_type; | |
fcd89c09 VT |
496 | |
497 | hci_conn_hold(le); | |
498 | ||
499 | return le; | |
500 | } | |
501 | ||
70f23020 AE |
502 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
503 | if (!acl) { | |
504 | acl = hci_conn_add(hdev, ACL_LINK, dst); | |
505 | if (!acl) | |
48c7aba9 | 506 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
507 | } |
508 | ||
509 | hci_conn_hold(acl); | |
510 | ||
09ab6f4c | 511 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
512 | acl->sec_level = BT_SECURITY_LOW; |
513 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 514 | acl->auth_type = auth_type; |
1da177e4 | 515 | hci_acl_connect(acl); |
09ab6f4c | 516 | } |
1da177e4 | 517 | |
5b7f9909 MH |
518 | if (type == ACL_LINK) |
519 | return acl; | |
1da177e4 | 520 | |
70f23020 AE |
521 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
522 | if (!sco) { | |
523 | sco = hci_conn_add(hdev, type, dst); | |
524 | if (!sco) { | |
5b7f9909 | 525 | hci_conn_put(acl); |
48c7aba9 | 526 | return ERR_PTR(-ENOMEM); |
1da177e4 | 527 | } |
5b7f9909 | 528 | } |
1da177e4 | 529 | |
5b7f9909 MH |
530 | acl->link = sco; |
531 | sco->link = acl; | |
1da177e4 | 532 | |
5b7f9909 | 533 | hci_conn_hold(sco); |
1da177e4 | 534 | |
5b7f9909 | 535 | if (acl->state == BT_CONNECTED && |
5974e4c4 | 536 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
58a681ef | 537 | set_bit(HCI_CONN_POWER_SAVE, &acl->flags); |
14b12d0b | 538 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 539 | |
51a8efd7 | 540 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { |
e73439d8 | 541 | /* defer SCO setup until mode change completed */ |
51a8efd7 | 542 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); |
e73439d8 MH |
543 | return sco; |
544 | } | |
545 | ||
546 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 547 | } |
5b7f9909 MH |
548 | |
549 | return sco; | |
1da177e4 | 550 | } |
1da177e4 | 551 | |
e7c29cb1 MH |
552 | /* Check link security requirement */ |
553 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
554 | { | |
555 | BT_DBG("conn %p", conn); | |
556 | ||
aa64a8b5 | 557 | if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT)) |
e7c29cb1 MH |
558 | return 0; |
559 | ||
560 | return 1; | |
561 | } | |
e7c29cb1 | 562 | |
1da177e4 | 563 | /* Authenticate remote device */ |
0684e5f9 | 564 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 LT |
565 | { |
566 | BT_DBG("conn %p", conn); | |
567 | ||
765c2a96 JH |
568 | if (conn->pending_sec_level > sec_level) |
569 | sec_level = conn->pending_sec_level; | |
570 | ||
96a31833 | 571 | if (sec_level > conn->sec_level) |
765c2a96 | 572 | conn->pending_sec_level = sec_level; |
96a31833 | 573 | else if (conn->link_mode & HCI_LM_AUTH) |
1da177e4 LT |
574 | return 1; |
575 | ||
65cf686e JH |
576 | /* Make sure we preserve an existing MITM requirement*/ |
577 | auth_type |= (conn->auth_type & 0x01); | |
578 | ||
96a31833 MH |
579 | conn->auth_type = auth_type; |
580 | ||
51a8efd7 | 581 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 582 | struct hci_cp_auth_requested cp; |
b7d05bad PH |
583 | |
584 | /* encrypt must be pending if auth is also pending */ | |
585 | set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); | |
586 | ||
aca3192c | 587 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 588 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
5974e4c4 | 589 | sizeof(cp), &cp); |
19f8def0 | 590 | if (conn->key_type != 0xff) |
51a8efd7 | 591 | set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); |
1da177e4 | 592 | } |
8c1b2355 | 593 | |
1da177e4 LT |
594 | return 0; |
595 | } | |
1da177e4 | 596 | |
13d39315 WR |
597 | /* Encrypt the the link */ |
598 | static void hci_conn_encrypt(struct hci_conn *conn) | |
599 | { | |
600 | BT_DBG("conn %p", conn); | |
601 | ||
51a8efd7 | 602 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { |
13d39315 WR |
603 | struct hci_cp_set_conn_encrypt cp; |
604 | cp.handle = cpu_to_le16(conn->handle); | |
605 | cp.encrypt = 0x01; | |
606 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
5974e4c4 | 607 | &cp); |
13d39315 WR |
608 | } |
609 | } | |
610 | ||
8c1b2355 | 611 | /* Enable security */ |
0684e5f9 | 612 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 LT |
613 | { |
614 | BT_DBG("conn %p", conn); | |
615 | ||
13d39315 | 616 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
617 | if (sec_level == BT_SECURITY_SDP) |
618 | return 1; | |
619 | ||
13d39315 WR |
620 | /* For non 2.1 devices and low security level we don't need the link |
621 | key. */ | |
aa64a8b5 | 622 | if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) |
3fdca1e1 | 623 | return 1; |
8c1b2355 | 624 | |
13d39315 WR |
625 | /* For other security levels we need the link key. */ |
626 | if (!(conn->link_mode & HCI_LM_AUTH)) | |
627 | goto auth; | |
628 | ||
629 | /* An authenticated combination key has sufficient security for any | |
630 | security level. */ | |
631 | if (conn->key_type == HCI_LK_AUTH_COMBINATION) | |
632 | goto encrypt; | |
633 | ||
634 | /* An unauthenticated combination key has sufficient security for | |
635 | security level 1 and 2. */ | |
636 | if (conn->key_type == HCI_LK_UNAUTH_COMBINATION && | |
5974e4c4 | 637 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW)) |
13d39315 WR |
638 | goto encrypt; |
639 | ||
640 | /* A combination key has always sufficient security for the security | |
641 | levels 1 or 2. High security level requires the combination key | |
642 | is generated using maximum PIN code length (16). | |
643 | For pre 2.1 units. */ | |
644 | if (conn->key_type == HCI_LK_COMBINATION && | |
5974e4c4 | 645 | (sec_level != BT_SECURITY_HIGH || conn->pin_length == 16)) |
13d39315 WR |
646 | goto encrypt; |
647 | ||
648 | auth: | |
51a8efd7 | 649 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) |
1da177e4 LT |
650 | return 0; |
651 | ||
6fdf658c LAD |
652 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
653 | return 0; | |
13d39315 WR |
654 | |
655 | encrypt: | |
656 | if (conn->link_mode & HCI_LM_ENCRYPT) | |
657 | return 1; | |
8c1b2355 | 658 | |
13d39315 | 659 | hci_conn_encrypt(conn); |
1da177e4 LT |
660 | return 0; |
661 | } | |
8c1b2355 | 662 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 663 | |
b3b1b061 WR |
664 | /* Check secure link requirement */ |
665 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
666 | { | |
667 | BT_DBG("conn %p", conn); | |
668 | ||
669 | if (sec_level != BT_SECURITY_HIGH) | |
670 | return 1; /* Accept if non-secure is required */ | |
671 | ||
ef4177e2 | 672 | if (conn->sec_level == BT_SECURITY_HIGH) |
b3b1b061 WR |
673 | return 1; |
674 | ||
675 | return 0; /* Reject not secure link */ | |
676 | } | |
677 | EXPORT_SYMBOL(hci_conn_check_secure); | |
678 | ||
1da177e4 LT |
679 | /* Change link key */ |
680 | int hci_conn_change_link_key(struct hci_conn *conn) | |
681 | { | |
682 | BT_DBG("conn %p", conn); | |
683 | ||
51a8efd7 | 684 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 685 | struct hci_cp_change_conn_link_key cp; |
aca3192c | 686 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 687 | hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY, |
5974e4c4 | 688 | sizeof(cp), &cp); |
1da177e4 | 689 | } |
8c1b2355 | 690 | |
1da177e4 LT |
691 | return 0; |
692 | } | |
1da177e4 LT |
693 | |
694 | /* Switch role */ | |
8c1b2355 | 695 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 LT |
696 | { |
697 | BT_DBG("conn %p", conn); | |
698 | ||
699 | if (!role && conn->link_mode & HCI_LM_MASTER) | |
700 | return 1; | |
701 | ||
51a8efd7 | 702 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { |
1da177e4 LT |
703 | struct hci_cp_switch_role cp; |
704 | bacpy(&cp.bdaddr, &conn->dst); | |
705 | cp.role = role; | |
a9de9248 | 706 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 707 | } |
8c1b2355 | 708 | |
1da177e4 LT |
709 | return 0; |
710 | } | |
711 | EXPORT_SYMBOL(hci_conn_switch_role); | |
712 | ||
04837f64 | 713 | /* Enter active mode */ |
14b12d0b | 714 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
715 | { |
716 | struct hci_dev *hdev = conn->hdev; | |
717 | ||
718 | BT_DBG("conn %p mode %d", conn, conn->mode); | |
719 | ||
720 | if (test_bit(HCI_RAW, &hdev->flags)) | |
721 | return; | |
722 | ||
14b12d0b JG |
723 | if (conn->mode != HCI_CM_SNIFF) |
724 | goto timer; | |
725 | ||
58a681ef | 726 | if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) |
04837f64 MH |
727 | goto timer; |
728 | ||
51a8efd7 | 729 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
04837f64 | 730 | struct hci_cp_exit_sniff_mode cp; |
aca3192c | 731 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 732 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
733 | } |
734 | ||
735 | timer: | |
736 | if (hdev->idle_timeout > 0) | |
737 | mod_timer(&conn->idle_timer, | |
5974e4c4 | 738 | jiffies + msecs_to_jiffies(hdev->idle_timeout)); |
04837f64 MH |
739 | } |
740 | ||
1da177e4 LT |
741 | /* Drop all connection on the device */ |
742 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
743 | { | |
744 | struct hci_conn_hash *h = &hdev->conn_hash; | |
3c4e0df0 | 745 | struct hci_conn *c, *n; |
1da177e4 LT |
746 | |
747 | BT_DBG("hdev %s", hdev->name); | |
748 | ||
3c4e0df0 | 749 | list_for_each_entry_safe(c, n, &h->list, list) { |
1da177e4 LT |
750 | c->state = BT_CLOSED; |
751 | ||
9f5a0d7b | 752 | hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); |
1da177e4 LT |
753 | hci_conn_del(c); |
754 | } | |
755 | } | |
756 | ||
a9de9248 MH |
757 | /* Check pending connect attempts */ |
758 | void hci_conn_check_pending(struct hci_dev *hdev) | |
759 | { | |
760 | struct hci_conn *conn; | |
761 | ||
762 | BT_DBG("hdev %s", hdev->name); | |
763 | ||
764 | hci_dev_lock(hdev); | |
765 | ||
766 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
767 | if (conn) | |
768 | hci_acl_connect(conn); | |
769 | ||
770 | hci_dev_unlock(hdev); | |
771 | } | |
772 | ||
9eba32b8 MH |
773 | void hci_conn_hold_device(struct hci_conn *conn) |
774 | { | |
775 | atomic_inc(&conn->devref); | |
776 | } | |
777 | EXPORT_SYMBOL(hci_conn_hold_device); | |
778 | ||
779 | void hci_conn_put_device(struct hci_conn *conn) | |
780 | { | |
781 | if (atomic_dec_and_test(&conn->devref)) | |
782 | hci_conn_del_sysfs(conn); | |
783 | } | |
784 | EXPORT_SYMBOL(hci_conn_put_device); | |
785 | ||
1da177e4 LT |
786 | int hci_get_conn_list(void __user *arg) |
787 | { | |
fc5fef61 | 788 | struct hci_conn *c; |
1da177e4 LT |
789 | struct hci_conn_list_req req, *cl; |
790 | struct hci_conn_info *ci; | |
791 | struct hci_dev *hdev; | |
1da177e4 LT |
792 | int n = 0, size, err; |
793 | ||
794 | if (copy_from_user(&req, arg, sizeof(req))) | |
795 | return -EFAULT; | |
796 | ||
797 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
798 | return -EINVAL; | |
799 | ||
800 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
801 | ||
70f23020 AE |
802 | cl = kmalloc(size, GFP_KERNEL); |
803 | if (!cl) | |
1da177e4 LT |
804 | return -ENOMEM; |
805 | ||
70f23020 AE |
806 | hdev = hci_dev_get(req.dev_id); |
807 | if (!hdev) { | |
1da177e4 LT |
808 | kfree(cl); |
809 | return -ENODEV; | |
810 | } | |
811 | ||
812 | ci = cl->conn_info; | |
813 | ||
09fd0de5 | 814 | hci_dev_lock(hdev); |
8035ded4 | 815 | list_for_each_entry(c, &hdev->conn_hash.list, list) { |
1da177e4 LT |
816 | bacpy(&(ci + n)->bdaddr, &c->dst); |
817 | (ci + n)->handle = c->handle; | |
818 | (ci + n)->type = c->type; | |
819 | (ci + n)->out = c->out; | |
820 | (ci + n)->state = c->state; | |
821 | (ci + n)->link_mode = c->link_mode; | |
822 | if (++n >= req.conn_num) | |
823 | break; | |
824 | } | |
09fd0de5 | 825 | hci_dev_unlock(hdev); |
1da177e4 LT |
826 | |
827 | cl->dev_id = hdev->id; | |
828 | cl->conn_num = n; | |
829 | size = sizeof(req) + n * sizeof(*ci); | |
830 | ||
831 | hci_dev_put(hdev); | |
832 | ||
833 | err = copy_to_user(arg, cl, size); | |
834 | kfree(cl); | |
835 | ||
836 | return err ? -EFAULT : 0; | |
837 | } | |
838 | ||
839 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
840 | { | |
841 | struct hci_conn_info_req req; | |
842 | struct hci_conn_info ci; | |
843 | struct hci_conn *conn; | |
844 | char __user *ptr = arg + sizeof(req); | |
845 | ||
846 | if (copy_from_user(&req, arg, sizeof(req))) | |
847 | return -EFAULT; | |
848 | ||
09fd0de5 | 849 | hci_dev_lock(hdev); |
1da177e4 LT |
850 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); |
851 | if (conn) { | |
852 | bacpy(&ci.bdaddr, &conn->dst); | |
853 | ci.handle = conn->handle; | |
854 | ci.type = conn->type; | |
855 | ci.out = conn->out; | |
856 | ci.state = conn->state; | |
857 | ci.link_mode = conn->link_mode; | |
858 | } | |
09fd0de5 | 859 | hci_dev_unlock(hdev); |
1da177e4 LT |
860 | |
861 | if (!conn) | |
862 | return -ENOENT; | |
863 | ||
864 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
865 | } | |
40be492f MH |
866 | |
867 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
868 | { | |
869 | struct hci_auth_info_req req; | |
870 | struct hci_conn *conn; | |
871 | ||
872 | if (copy_from_user(&req, arg, sizeof(req))) | |
873 | return -EFAULT; | |
874 | ||
09fd0de5 | 875 | hci_dev_lock(hdev); |
40be492f MH |
876 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); |
877 | if (conn) | |
878 | req.type = conn->auth_type; | |
09fd0de5 | 879 | hci_dev_unlock(hdev); |
40be492f MH |
880 | |
881 | if (!conn) | |
882 | return -ENOENT; | |
883 | ||
884 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
885 | } | |
73d80deb LAD |
886 | |
887 | struct hci_chan *hci_chan_create(struct hci_conn *conn) | |
888 | { | |
889 | struct hci_dev *hdev = conn->hdev; | |
890 | struct hci_chan *chan; | |
891 | ||
892 | BT_DBG("%s conn %p", hdev->name, conn); | |
893 | ||
75d7735c | 894 | chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL); |
73d80deb LAD |
895 | if (!chan) |
896 | return NULL; | |
897 | ||
898 | chan->conn = conn; | |
899 | skb_queue_head_init(&chan->data_q); | |
900 | ||
8192edef | 901 | list_add_rcu(&chan->list, &conn->chan_list); |
73d80deb LAD |
902 | |
903 | return chan; | |
904 | } | |
905 | ||
906 | int hci_chan_del(struct hci_chan *chan) | |
907 | { | |
908 | struct hci_conn *conn = chan->conn; | |
909 | struct hci_dev *hdev = conn->hdev; | |
910 | ||
911 | BT_DBG("%s conn %p chan %p", hdev->name, conn, chan); | |
912 | ||
8192edef GP |
913 | list_del_rcu(&chan->list); |
914 | ||
915 | synchronize_rcu(); | |
73d80deb LAD |
916 | |
917 | skb_queue_purge(&chan->data_q); | |
918 | kfree(chan); | |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
2c33c06a | 923 | void hci_chan_list_flush(struct hci_conn *conn) |
73d80deb | 924 | { |
2a5a5ec6 | 925 | struct hci_chan *chan, *n; |
73d80deb LAD |
926 | |
927 | BT_DBG("conn %p", conn); | |
928 | ||
2a5a5ec6 | 929 | list_for_each_entry_safe(chan, n, &conn->chan_list, list) |
73d80deb LAD |
930 | hci_chan_del(chan); |
931 | } |