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 | ||
38b3fef1 | 110 | BT_DBG("hcon %p", conn); |
6ac59344 | 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 | ||
38b3fef1 | 123 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
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 | ||
38b3fef1 | 137 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
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 | ||
38b3fef1 | 155 | BT_DBG("hcon %p", conn); |
b6a0dc82 MH |
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 | ||
38b3fef1 | 199 | BT_DBG("hcon %p", conn); |
a7a595f6 VCG |
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 | ||
e73439d8 MH |
216 | if (!sco) |
217 | return; | |
218 | ||
38b3fef1 AE |
219 | BT_DBG("hcon %p", conn); |
220 | ||
e73439d8 MH |
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 | |
38b3fef1 | 238 | BT_DBG("hcon %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 | ||
38b3fef1 | 269 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
416dc94b GP |
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 | ||
38b3fef1 | 304 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
04837f64 MH |
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 | ||
38b3fef1 | 385 | BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle); |
1da177e4 | 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 | 444 | if (!test_bit(HCI_UP, &d->flags) || |
d300fa9b AE |
445 | test_bit(HCI_RAW, &d->flags) || |
446 | d->dev_type != HCI_BREDR) | |
1da177e4 LT |
447 | continue; |
448 | ||
8e87d142 | 449 | /* Simple routing: |
1da177e4 LT |
450 | * No source address - find interface with bdaddr != dst |
451 | * Source address - find interface with bdaddr == src | |
452 | */ | |
453 | ||
454 | if (use_src) { | |
455 | if (!bacmp(&d->bdaddr, src)) { | |
456 | hdev = d; break; | |
457 | } | |
458 | } else { | |
459 | if (bacmp(&d->bdaddr, dst)) { | |
460 | hdev = d; break; | |
461 | } | |
462 | } | |
463 | } | |
464 | ||
465 | if (hdev) | |
466 | hdev = hci_dev_hold(hdev); | |
467 | ||
f20d09d5 | 468 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
469 | return hdev; |
470 | } | |
471 | EXPORT_SYMBOL(hci_get_route); | |
472 | ||
fcd89c09 | 473 | /* Create SCO, ACL or LE connection. |
1da177e4 | 474 | * Device _must_ be locked */ |
b12f62cf AG |
475 | struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, |
476 | __u8 dst_type, __u8 sec_level, __u8 auth_type) | |
1da177e4 LT |
477 | { |
478 | struct hci_conn *acl; | |
5b7f9909 | 479 | struct hci_conn *sco; |
fcd89c09 | 480 | struct hci_conn *le; |
1da177e4 LT |
481 | |
482 | BT_DBG("%s dst %s", hdev->name, batostr(dst)); | |
483 | ||
fcd89c09 VT |
484 | if (type == LE_LINK) { |
485 | le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); | |
9f0caeb1 | 486 | if (!le) { |
dfc94dbd AK |
487 | le = hci_conn_hash_lookup_state(hdev, LE_LINK, |
488 | BT_CONNECT); | |
489 | if (le) | |
490 | return ERR_PTR(-EBUSY); | |
491 | ||
9f0caeb1 VCG |
492 | le = hci_conn_add(hdev, LE_LINK, dst); |
493 | if (!le) | |
494 | return ERR_PTR(-ENOMEM); | |
495 | ||
b12f62cf | 496 | le->dst_type = bdaddr_to_le(dst_type); |
9f0caeb1 VCG |
497 | hci_le_connect(le); |
498 | } | |
eda42b50 | 499 | |
9f0caeb1 VCG |
500 | le->pending_sec_level = sec_level; |
501 | le->auth_type = auth_type; | |
fcd89c09 VT |
502 | |
503 | hci_conn_hold(le); | |
504 | ||
505 | return le; | |
506 | } | |
507 | ||
70f23020 AE |
508 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
509 | if (!acl) { | |
510 | acl = hci_conn_add(hdev, ACL_LINK, dst); | |
511 | if (!acl) | |
48c7aba9 | 512 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
513 | } |
514 | ||
515 | hci_conn_hold(acl); | |
516 | ||
09ab6f4c | 517 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
518 | acl->sec_level = BT_SECURITY_LOW; |
519 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 520 | acl->auth_type = auth_type; |
1da177e4 | 521 | hci_acl_connect(acl); |
09ab6f4c | 522 | } |
1da177e4 | 523 | |
5b7f9909 MH |
524 | if (type == ACL_LINK) |
525 | return acl; | |
1da177e4 | 526 | |
70f23020 AE |
527 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
528 | if (!sco) { | |
529 | sco = hci_conn_add(hdev, type, dst); | |
530 | if (!sco) { | |
5b7f9909 | 531 | hci_conn_put(acl); |
48c7aba9 | 532 | return ERR_PTR(-ENOMEM); |
1da177e4 | 533 | } |
5b7f9909 | 534 | } |
1da177e4 | 535 | |
5b7f9909 MH |
536 | acl->link = sco; |
537 | sco->link = acl; | |
1da177e4 | 538 | |
5b7f9909 | 539 | hci_conn_hold(sco); |
1da177e4 | 540 | |
5b7f9909 | 541 | if (acl->state == BT_CONNECTED && |
5974e4c4 | 542 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
58a681ef | 543 | set_bit(HCI_CONN_POWER_SAVE, &acl->flags); |
14b12d0b | 544 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 545 | |
51a8efd7 | 546 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { |
e73439d8 | 547 | /* defer SCO setup until mode change completed */ |
51a8efd7 | 548 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); |
e73439d8 MH |
549 | return sco; |
550 | } | |
551 | ||
552 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 553 | } |
5b7f9909 MH |
554 | |
555 | return sco; | |
1da177e4 | 556 | } |
1da177e4 | 557 | |
e7c29cb1 MH |
558 | /* Check link security requirement */ |
559 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
560 | { | |
38b3fef1 | 561 | BT_DBG("hcon %p", conn); |
e7c29cb1 | 562 | |
aa64a8b5 | 563 | if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT)) |
e7c29cb1 MH |
564 | return 0; |
565 | ||
566 | return 1; | |
567 | } | |
e7c29cb1 | 568 | |
1da177e4 | 569 | /* Authenticate remote device */ |
0684e5f9 | 570 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 | 571 | { |
38b3fef1 | 572 | BT_DBG("hcon %p", conn); |
1da177e4 | 573 | |
765c2a96 JH |
574 | if (conn->pending_sec_level > sec_level) |
575 | sec_level = conn->pending_sec_level; | |
576 | ||
96a31833 | 577 | if (sec_level > conn->sec_level) |
765c2a96 | 578 | conn->pending_sec_level = sec_level; |
96a31833 | 579 | else if (conn->link_mode & HCI_LM_AUTH) |
1da177e4 LT |
580 | return 1; |
581 | ||
65cf686e JH |
582 | /* Make sure we preserve an existing MITM requirement*/ |
583 | auth_type |= (conn->auth_type & 0x01); | |
584 | ||
96a31833 MH |
585 | conn->auth_type = auth_type; |
586 | ||
51a8efd7 | 587 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 588 | struct hci_cp_auth_requested cp; |
b7d05bad PH |
589 | |
590 | /* encrypt must be pending if auth is also pending */ | |
591 | set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); | |
592 | ||
aca3192c | 593 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 594 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
5974e4c4 | 595 | sizeof(cp), &cp); |
19f8def0 | 596 | if (conn->key_type != 0xff) |
51a8efd7 | 597 | set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); |
1da177e4 | 598 | } |
8c1b2355 | 599 | |
1da177e4 LT |
600 | return 0; |
601 | } | |
1da177e4 | 602 | |
13d39315 WR |
603 | /* Encrypt the the link */ |
604 | static void hci_conn_encrypt(struct hci_conn *conn) | |
605 | { | |
38b3fef1 | 606 | BT_DBG("hcon %p", conn); |
13d39315 | 607 | |
51a8efd7 | 608 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { |
13d39315 WR |
609 | struct hci_cp_set_conn_encrypt cp; |
610 | cp.handle = cpu_to_le16(conn->handle); | |
611 | cp.encrypt = 0x01; | |
612 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
5974e4c4 | 613 | &cp); |
13d39315 WR |
614 | } |
615 | } | |
616 | ||
8c1b2355 | 617 | /* Enable security */ |
0684e5f9 | 618 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 | 619 | { |
38b3fef1 | 620 | BT_DBG("hcon %p", conn); |
1da177e4 | 621 | |
13d39315 | 622 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
623 | if (sec_level == BT_SECURITY_SDP) |
624 | return 1; | |
625 | ||
13d39315 WR |
626 | /* For non 2.1 devices and low security level we don't need the link |
627 | key. */ | |
aa64a8b5 | 628 | if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) |
3fdca1e1 | 629 | return 1; |
8c1b2355 | 630 | |
13d39315 WR |
631 | /* For other security levels we need the link key. */ |
632 | if (!(conn->link_mode & HCI_LM_AUTH)) | |
633 | goto auth; | |
634 | ||
635 | /* An authenticated combination key has sufficient security for any | |
636 | security level. */ | |
637 | if (conn->key_type == HCI_LK_AUTH_COMBINATION) | |
638 | goto encrypt; | |
639 | ||
640 | /* An unauthenticated combination key has sufficient security for | |
641 | security level 1 and 2. */ | |
642 | if (conn->key_type == HCI_LK_UNAUTH_COMBINATION && | |
5974e4c4 | 643 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW)) |
13d39315 WR |
644 | goto encrypt; |
645 | ||
646 | /* A combination key has always sufficient security for the security | |
647 | levels 1 or 2. High security level requires the combination key | |
648 | is generated using maximum PIN code length (16). | |
649 | For pre 2.1 units. */ | |
650 | if (conn->key_type == HCI_LK_COMBINATION && | |
5974e4c4 | 651 | (sec_level != BT_SECURITY_HIGH || conn->pin_length == 16)) |
13d39315 WR |
652 | goto encrypt; |
653 | ||
654 | auth: | |
51a8efd7 | 655 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) |
1da177e4 LT |
656 | return 0; |
657 | ||
6fdf658c LAD |
658 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
659 | return 0; | |
13d39315 WR |
660 | |
661 | encrypt: | |
662 | if (conn->link_mode & HCI_LM_ENCRYPT) | |
663 | return 1; | |
8c1b2355 | 664 | |
13d39315 | 665 | hci_conn_encrypt(conn); |
1da177e4 LT |
666 | return 0; |
667 | } | |
8c1b2355 | 668 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 669 | |
b3b1b061 WR |
670 | /* Check secure link requirement */ |
671 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
672 | { | |
38b3fef1 | 673 | BT_DBG("hcon %p", conn); |
b3b1b061 WR |
674 | |
675 | if (sec_level != BT_SECURITY_HIGH) | |
676 | return 1; /* Accept if non-secure is required */ | |
677 | ||
ef4177e2 | 678 | if (conn->sec_level == BT_SECURITY_HIGH) |
b3b1b061 WR |
679 | return 1; |
680 | ||
681 | return 0; /* Reject not secure link */ | |
682 | } | |
683 | EXPORT_SYMBOL(hci_conn_check_secure); | |
684 | ||
1da177e4 LT |
685 | /* Change link key */ |
686 | int hci_conn_change_link_key(struct hci_conn *conn) | |
687 | { | |
38b3fef1 | 688 | BT_DBG("hcon %p", conn); |
1da177e4 | 689 | |
51a8efd7 | 690 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 691 | struct hci_cp_change_conn_link_key cp; |
aca3192c | 692 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 693 | hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY, |
5974e4c4 | 694 | sizeof(cp), &cp); |
1da177e4 | 695 | } |
8c1b2355 | 696 | |
1da177e4 LT |
697 | return 0; |
698 | } | |
1da177e4 LT |
699 | |
700 | /* Switch role */ | |
8c1b2355 | 701 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 | 702 | { |
38b3fef1 | 703 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
704 | |
705 | if (!role && conn->link_mode & HCI_LM_MASTER) | |
706 | return 1; | |
707 | ||
51a8efd7 | 708 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { |
1da177e4 LT |
709 | struct hci_cp_switch_role cp; |
710 | bacpy(&cp.bdaddr, &conn->dst); | |
711 | cp.role = role; | |
a9de9248 | 712 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 713 | } |
8c1b2355 | 714 | |
1da177e4 LT |
715 | return 0; |
716 | } | |
717 | EXPORT_SYMBOL(hci_conn_switch_role); | |
718 | ||
04837f64 | 719 | /* Enter active mode */ |
14b12d0b | 720 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
721 | { |
722 | struct hci_dev *hdev = conn->hdev; | |
723 | ||
38b3fef1 | 724 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
04837f64 MH |
725 | |
726 | if (test_bit(HCI_RAW, &hdev->flags)) | |
727 | return; | |
728 | ||
14b12d0b JG |
729 | if (conn->mode != HCI_CM_SNIFF) |
730 | goto timer; | |
731 | ||
58a681ef | 732 | if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) |
04837f64 MH |
733 | goto timer; |
734 | ||
51a8efd7 | 735 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
04837f64 | 736 | struct hci_cp_exit_sniff_mode cp; |
aca3192c | 737 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 738 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
739 | } |
740 | ||
741 | timer: | |
742 | if (hdev->idle_timeout > 0) | |
743 | mod_timer(&conn->idle_timer, | |
5974e4c4 | 744 | jiffies + msecs_to_jiffies(hdev->idle_timeout)); |
04837f64 MH |
745 | } |
746 | ||
1da177e4 LT |
747 | /* Drop all connection on the device */ |
748 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
749 | { | |
750 | struct hci_conn_hash *h = &hdev->conn_hash; | |
3c4e0df0 | 751 | struct hci_conn *c, *n; |
1da177e4 LT |
752 | |
753 | BT_DBG("hdev %s", hdev->name); | |
754 | ||
3c4e0df0 | 755 | list_for_each_entry_safe(c, n, &h->list, list) { |
1da177e4 LT |
756 | c->state = BT_CLOSED; |
757 | ||
9f5a0d7b | 758 | hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); |
1da177e4 LT |
759 | hci_conn_del(c); |
760 | } | |
761 | } | |
762 | ||
a9de9248 MH |
763 | /* Check pending connect attempts */ |
764 | void hci_conn_check_pending(struct hci_dev *hdev) | |
765 | { | |
766 | struct hci_conn *conn; | |
767 | ||
768 | BT_DBG("hdev %s", hdev->name); | |
769 | ||
770 | hci_dev_lock(hdev); | |
771 | ||
772 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
773 | if (conn) | |
774 | hci_acl_connect(conn); | |
775 | ||
776 | hci_dev_unlock(hdev); | |
777 | } | |
778 | ||
9eba32b8 MH |
779 | void hci_conn_hold_device(struct hci_conn *conn) |
780 | { | |
781 | atomic_inc(&conn->devref); | |
782 | } | |
783 | EXPORT_SYMBOL(hci_conn_hold_device); | |
784 | ||
785 | void hci_conn_put_device(struct hci_conn *conn) | |
786 | { | |
787 | if (atomic_dec_and_test(&conn->devref)) | |
788 | hci_conn_del_sysfs(conn); | |
789 | } | |
790 | EXPORT_SYMBOL(hci_conn_put_device); | |
791 | ||
1da177e4 LT |
792 | int hci_get_conn_list(void __user *arg) |
793 | { | |
fc5fef61 | 794 | struct hci_conn *c; |
1da177e4 LT |
795 | struct hci_conn_list_req req, *cl; |
796 | struct hci_conn_info *ci; | |
797 | struct hci_dev *hdev; | |
1da177e4 LT |
798 | int n = 0, size, err; |
799 | ||
800 | if (copy_from_user(&req, arg, sizeof(req))) | |
801 | return -EFAULT; | |
802 | ||
803 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
804 | return -EINVAL; | |
805 | ||
806 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
807 | ||
70f23020 AE |
808 | cl = kmalloc(size, GFP_KERNEL); |
809 | if (!cl) | |
1da177e4 LT |
810 | return -ENOMEM; |
811 | ||
70f23020 AE |
812 | hdev = hci_dev_get(req.dev_id); |
813 | if (!hdev) { | |
1da177e4 LT |
814 | kfree(cl); |
815 | return -ENODEV; | |
816 | } | |
817 | ||
818 | ci = cl->conn_info; | |
819 | ||
09fd0de5 | 820 | hci_dev_lock(hdev); |
8035ded4 | 821 | list_for_each_entry(c, &hdev->conn_hash.list, list) { |
1da177e4 LT |
822 | bacpy(&(ci + n)->bdaddr, &c->dst); |
823 | (ci + n)->handle = c->handle; | |
824 | (ci + n)->type = c->type; | |
825 | (ci + n)->out = c->out; | |
826 | (ci + n)->state = c->state; | |
827 | (ci + n)->link_mode = c->link_mode; | |
828 | if (++n >= req.conn_num) | |
829 | break; | |
830 | } | |
09fd0de5 | 831 | hci_dev_unlock(hdev); |
1da177e4 LT |
832 | |
833 | cl->dev_id = hdev->id; | |
834 | cl->conn_num = n; | |
835 | size = sizeof(req) + n * sizeof(*ci); | |
836 | ||
837 | hci_dev_put(hdev); | |
838 | ||
839 | err = copy_to_user(arg, cl, size); | |
840 | kfree(cl); | |
841 | ||
842 | return err ? -EFAULT : 0; | |
843 | } | |
844 | ||
845 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
846 | { | |
847 | struct hci_conn_info_req req; | |
848 | struct hci_conn_info ci; | |
849 | struct hci_conn *conn; | |
850 | char __user *ptr = arg + sizeof(req); | |
851 | ||
852 | if (copy_from_user(&req, arg, sizeof(req))) | |
853 | return -EFAULT; | |
854 | ||
09fd0de5 | 855 | hci_dev_lock(hdev); |
1da177e4 LT |
856 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); |
857 | if (conn) { | |
858 | bacpy(&ci.bdaddr, &conn->dst); | |
859 | ci.handle = conn->handle; | |
860 | ci.type = conn->type; | |
861 | ci.out = conn->out; | |
862 | ci.state = conn->state; | |
863 | ci.link_mode = conn->link_mode; | |
864 | } | |
09fd0de5 | 865 | hci_dev_unlock(hdev); |
1da177e4 LT |
866 | |
867 | if (!conn) | |
868 | return -ENOENT; | |
869 | ||
870 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
871 | } | |
40be492f MH |
872 | |
873 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
874 | { | |
875 | struct hci_auth_info_req req; | |
876 | struct hci_conn *conn; | |
877 | ||
878 | if (copy_from_user(&req, arg, sizeof(req))) | |
879 | return -EFAULT; | |
880 | ||
09fd0de5 | 881 | hci_dev_lock(hdev); |
40be492f MH |
882 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); |
883 | if (conn) | |
884 | req.type = conn->auth_type; | |
09fd0de5 | 885 | hci_dev_unlock(hdev); |
40be492f MH |
886 | |
887 | if (!conn) | |
888 | return -ENOENT; | |
889 | ||
890 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
891 | } | |
73d80deb LAD |
892 | |
893 | struct hci_chan *hci_chan_create(struct hci_conn *conn) | |
894 | { | |
895 | struct hci_dev *hdev = conn->hdev; | |
896 | struct hci_chan *chan; | |
897 | ||
38b3fef1 | 898 | BT_DBG("%s hcon %p", hdev->name, conn); |
73d80deb | 899 | |
75d7735c | 900 | chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL); |
73d80deb LAD |
901 | if (!chan) |
902 | return NULL; | |
903 | ||
904 | chan->conn = conn; | |
905 | skb_queue_head_init(&chan->data_q); | |
906 | ||
8192edef | 907 | list_add_rcu(&chan->list, &conn->chan_list); |
73d80deb LAD |
908 | |
909 | return chan; | |
910 | } | |
911 | ||
912 | int hci_chan_del(struct hci_chan *chan) | |
913 | { | |
914 | struct hci_conn *conn = chan->conn; | |
915 | struct hci_dev *hdev = conn->hdev; | |
916 | ||
38b3fef1 | 917 | BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan); |
73d80deb | 918 | |
8192edef GP |
919 | list_del_rcu(&chan->list); |
920 | ||
921 | synchronize_rcu(); | |
73d80deb LAD |
922 | |
923 | skb_queue_purge(&chan->data_q); | |
924 | kfree(chan); | |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
2c33c06a | 929 | void hci_chan_list_flush(struct hci_conn *conn) |
73d80deb | 930 | { |
2a5a5ec6 | 931 | struct hci_chan *chan, *n; |
73d80deb | 932 | |
38b3fef1 | 933 | BT_DBG("hcon %p", conn); |
73d80deb | 934 | |
2a5a5ec6 | 935 | list_for_each_entry_safe(chan, n, &conn->chan_list, list) |
73d80deb LAD |
936 | hci_chan_del(chan); |
937 | } |