]>
Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
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 sockets. */ | |
26 | ||
8c520a59 | 27 | #include <linux/export.h> |
1da177e4 LT |
28 | #include <asm/unaligned.h> |
29 | ||
30 | #include <net/bluetooth/bluetooth.h> | |
31 | #include <net/bluetooth/hci_core.h> | |
cd82e61c | 32 | #include <net/bluetooth/hci_mon.h> |
fa4335d7 JH |
33 | #include <net/bluetooth/mgmt.h> |
34 | ||
35 | #include "mgmt_util.h" | |
1da177e4 | 36 | |
801c1e8d JH |
37 | static LIST_HEAD(mgmt_chan_list); |
38 | static DEFINE_MUTEX(mgmt_chan_list_lock); | |
39 | ||
cd82e61c MH |
40 | static atomic_t monitor_promisc = ATOMIC_INIT(0); |
41 | ||
1da177e4 LT |
42 | /* ----- HCI socket interface ----- */ |
43 | ||
863def58 MH |
44 | /* Socket info */ |
45 | #define hci_pi(sk) ((struct hci_pinfo *) sk) | |
46 | ||
47 | struct hci_pinfo { | |
48 | struct bt_sock bt; | |
49 | struct hci_dev *hdev; | |
50 | struct hci_filter filter; | |
51 | __u32 cmsg_mask; | |
52 | unsigned short channel; | |
6befc644 | 53 | unsigned long flags; |
863def58 MH |
54 | }; |
55 | ||
6befc644 MH |
56 | void hci_sock_set_flag(struct sock *sk, int nr) |
57 | { | |
58 | set_bit(nr, &hci_pi(sk)->flags); | |
59 | } | |
60 | ||
61 | void hci_sock_clear_flag(struct sock *sk, int nr) | |
62 | { | |
63 | clear_bit(nr, &hci_pi(sk)->flags); | |
64 | } | |
65 | ||
c85be545 MH |
66 | int hci_sock_test_flag(struct sock *sk, int nr) |
67 | { | |
68 | return test_bit(nr, &hci_pi(sk)->flags); | |
69 | } | |
70 | ||
d0f172b1 JH |
71 | unsigned short hci_sock_get_channel(struct sock *sk) |
72 | { | |
73 | return hci_pi(sk)->channel; | |
74 | } | |
75 | ||
9391976a | 76 | static inline int hci_test_bit(int nr, const void *addr) |
1da177e4 | 77 | { |
9391976a | 78 | return *((const __u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31)); |
1da177e4 LT |
79 | } |
80 | ||
81 | /* Security filter */ | |
3ad254f7 MH |
82 | #define HCI_SFLT_MAX_OGF 5 |
83 | ||
84 | struct hci_sec_filter { | |
85 | __u32 type_mask; | |
86 | __u32 event_mask[2]; | |
87 | __u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4]; | |
88 | }; | |
89 | ||
7e67c112 | 90 | static const struct hci_sec_filter hci_sec_filter = { |
1da177e4 LT |
91 | /* Packet types */ |
92 | 0x10, | |
93 | /* Events */ | |
dd7f5527 | 94 | { 0x1000d9fe, 0x0000b00c }, |
1da177e4 LT |
95 | /* Commands */ |
96 | { | |
97 | { 0x0 }, | |
98 | /* OGF_LINK_CTL */ | |
7c631a67 | 99 | { 0xbe000006, 0x00000001, 0x00000000, 0x00 }, |
1da177e4 | 100 | /* OGF_LINK_POLICY */ |
7c631a67 | 101 | { 0x00005200, 0x00000000, 0x00000000, 0x00 }, |
1da177e4 | 102 | /* OGF_HOST_CTL */ |
7c631a67 | 103 | { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 }, |
1da177e4 | 104 | /* OGF_INFO_PARAM */ |
7c631a67 | 105 | { 0x000002be, 0x00000000, 0x00000000, 0x00 }, |
1da177e4 | 106 | /* OGF_STATUS_PARAM */ |
7c631a67 | 107 | { 0x000000ea, 0x00000000, 0x00000000, 0x00 } |
1da177e4 LT |
108 | } |
109 | }; | |
110 | ||
111 | static struct bt_sock_list hci_sk_list = { | |
d5fb2962 | 112 | .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock) |
1da177e4 LT |
113 | }; |
114 | ||
f81fe64f MH |
115 | static bool is_filtered_packet(struct sock *sk, struct sk_buff *skb) |
116 | { | |
117 | struct hci_filter *flt; | |
118 | int flt_type, flt_event; | |
119 | ||
120 | /* Apply filter */ | |
121 | flt = &hci_pi(sk)->filter; | |
122 | ||
8cd4f581 | 123 | flt_type = bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS; |
f81fe64f MH |
124 | |
125 | if (!test_bit(flt_type, &flt->type_mask)) | |
126 | return true; | |
127 | ||
128 | /* Extra filter for event packets only */ | |
129 | if (bt_cb(skb)->pkt_type != HCI_EVENT_PKT) | |
130 | return false; | |
131 | ||
132 | flt_event = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS); | |
133 | ||
134 | if (!hci_test_bit(flt_event, &flt->event_mask)) | |
135 | return true; | |
136 | ||
137 | /* Check filter only when opcode is set */ | |
138 | if (!flt->opcode) | |
139 | return false; | |
140 | ||
141 | if (flt_event == HCI_EV_CMD_COMPLETE && | |
142 | flt->opcode != get_unaligned((__le16 *)(skb->data + 3))) | |
143 | return true; | |
144 | ||
145 | if (flt_event == HCI_EV_CMD_STATUS && | |
146 | flt->opcode != get_unaligned((__le16 *)(skb->data + 4))) | |
147 | return true; | |
148 | ||
149 | return false; | |
150 | } | |
151 | ||
1da177e4 | 152 | /* Send frame to RAW socket */ |
470fe1b5 | 153 | void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 LT |
154 | { |
155 | struct sock *sk; | |
e0edf373 | 156 | struct sk_buff *skb_copy = NULL; |
1da177e4 LT |
157 | |
158 | BT_DBG("hdev %p len %d", hdev, skb->len); | |
159 | ||
160 | read_lock(&hci_sk_list.lock); | |
470fe1b5 | 161 | |
b67bfe0d | 162 | sk_for_each(sk, &hci_sk_list.head) { |
1da177e4 LT |
163 | struct sk_buff *nskb; |
164 | ||
165 | if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev) | |
166 | continue; | |
167 | ||
168 | /* Don't send frame to the socket it came from */ | |
169 | if (skb->sk == sk) | |
170 | continue; | |
171 | ||
23500189 MH |
172 | if (hci_pi(sk)->channel == HCI_CHANNEL_RAW) { |
173 | if (is_filtered_packet(sk, skb)) | |
174 | continue; | |
175 | } else if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { | |
176 | if (!bt_cb(skb)->incoming) | |
177 | continue; | |
178 | if (bt_cb(skb)->pkt_type != HCI_EVENT_PKT && | |
179 | bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT && | |
180 | bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) | |
181 | continue; | |
182 | } else { | |
183 | /* Don't send frame to other channel types */ | |
1da177e4 | 184 | continue; |
23500189 | 185 | } |
1da177e4 | 186 | |
e0edf373 MH |
187 | if (!skb_copy) { |
188 | /* Create a private copy with headroom */ | |
bad93e9d | 189 | skb_copy = __pskb_copy_fclone(skb, 1, GFP_ATOMIC, true); |
e0edf373 MH |
190 | if (!skb_copy) |
191 | continue; | |
192 | ||
193 | /* Put type byte before the data */ | |
194 | memcpy(skb_push(skb_copy, 1), &bt_cb(skb)->pkt_type, 1); | |
195 | } | |
196 | ||
197 | nskb = skb_clone(skb_copy, GFP_ATOMIC); | |
70f23020 | 198 | if (!nskb) |
1da177e4 LT |
199 | continue; |
200 | ||
470fe1b5 MH |
201 | if (sock_queue_rcv_skb(sk, nskb)) |
202 | kfree_skb(nskb); | |
203 | } | |
204 | ||
205 | read_unlock(&hci_sk_list.lock); | |
e0edf373 MH |
206 | |
207 | kfree_skb(skb_copy); | |
470fe1b5 MH |
208 | } |
209 | ||
7129069e JH |
210 | /* Send frame to sockets with specific channel */ |
211 | void hci_send_to_channel(unsigned short channel, struct sk_buff *skb, | |
c08b1a1d | 212 | int flag, struct sock *skip_sk) |
470fe1b5 MH |
213 | { |
214 | struct sock *sk; | |
470fe1b5 | 215 | |
7129069e | 216 | BT_DBG("channel %u len %d", channel, skb->len); |
470fe1b5 MH |
217 | |
218 | read_lock(&hci_sk_list.lock); | |
219 | ||
b67bfe0d | 220 | sk_for_each(sk, &hci_sk_list.head) { |
470fe1b5 MH |
221 | struct sk_buff *nskb; |
222 | ||
c08b1a1d | 223 | /* Ignore socket without the flag set */ |
c85be545 | 224 | if (!hci_sock_test_flag(sk, flag)) |
d7f72f61 MH |
225 | continue; |
226 | ||
c08b1a1d MH |
227 | /* Skip the original socket */ |
228 | if (sk == skip_sk) | |
17711c62 MH |
229 | continue; |
230 | ||
231 | if (sk->sk_state != BT_BOUND) | |
232 | continue; | |
233 | ||
234 | if (hci_pi(sk)->channel != channel) | |
235 | continue; | |
236 | ||
237 | nskb = skb_clone(skb, GFP_ATOMIC); | |
238 | if (!nskb) | |
239 | continue; | |
240 | ||
241 | if (sock_queue_rcv_skb(sk, nskb)) | |
242 | kfree_skb(nskb); | |
243 | } | |
244 | ||
245 | read_unlock(&hci_sk_list.lock); | |
246 | } | |
247 | ||
cd82e61c MH |
248 | /* Send frame to monitor socket */ |
249 | void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb) | |
250 | { | |
cd82e61c | 251 | struct sk_buff *skb_copy = NULL; |
2b531294 | 252 | struct hci_mon_hdr *hdr; |
cd82e61c MH |
253 | __le16 opcode; |
254 | ||
255 | if (!atomic_read(&monitor_promisc)) | |
256 | return; | |
257 | ||
258 | BT_DBG("hdev %p len %d", hdev, skb->len); | |
259 | ||
260 | switch (bt_cb(skb)->pkt_type) { | |
261 | case HCI_COMMAND_PKT: | |
dcf4adbf | 262 | opcode = cpu_to_le16(HCI_MON_COMMAND_PKT); |
cd82e61c MH |
263 | break; |
264 | case HCI_EVENT_PKT: | |
dcf4adbf | 265 | opcode = cpu_to_le16(HCI_MON_EVENT_PKT); |
cd82e61c MH |
266 | break; |
267 | case HCI_ACLDATA_PKT: | |
268 | if (bt_cb(skb)->incoming) | |
dcf4adbf | 269 | opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT); |
cd82e61c | 270 | else |
dcf4adbf | 271 | opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT); |
cd82e61c MH |
272 | break; |
273 | case HCI_SCODATA_PKT: | |
274 | if (bt_cb(skb)->incoming) | |
dcf4adbf | 275 | opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT); |
cd82e61c | 276 | else |
dcf4adbf | 277 | opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT); |
cd82e61c | 278 | break; |
e875ff84 MH |
279 | case HCI_DIAG_PKT: |
280 | opcode = cpu_to_le16(HCI_MON_VENDOR_DIAG); | |
281 | break; | |
cd82e61c MH |
282 | default: |
283 | return; | |
284 | } | |
285 | ||
2b531294 MH |
286 | /* Create a private copy with headroom */ |
287 | skb_copy = __pskb_copy_fclone(skb, HCI_MON_HDR_SIZE, GFP_ATOMIC, true); | |
288 | if (!skb_copy) | |
289 | return; | |
290 | ||
291 | /* Put header before the data */ | |
292 | hdr = (void *) skb_push(skb_copy, HCI_MON_HDR_SIZE); | |
293 | hdr->opcode = opcode; | |
294 | hdr->index = cpu_to_le16(hdev->id); | |
295 | hdr->len = cpu_to_le16(skb->len); | |
296 | ||
c08b1a1d MH |
297 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb_copy, |
298 | HCI_SOCK_TRUSTED, NULL); | |
cd82e61c MH |
299 | kfree_skb(skb_copy); |
300 | } | |
301 | ||
cd82e61c MH |
302 | static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event) |
303 | { | |
304 | struct hci_mon_hdr *hdr; | |
305 | struct hci_mon_new_index *ni; | |
6c566dd5 | 306 | struct hci_mon_index_info *ii; |
cd82e61c MH |
307 | struct sk_buff *skb; |
308 | __le16 opcode; | |
309 | ||
310 | switch (event) { | |
311 | case HCI_DEV_REG: | |
312 | skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC); | |
313 | if (!skb) | |
314 | return NULL; | |
315 | ||
6c566dd5 | 316 | ni = (void *)skb_put(skb, HCI_MON_NEW_INDEX_SIZE); |
cd82e61c MH |
317 | ni->type = hdev->dev_type; |
318 | ni->bus = hdev->bus; | |
319 | bacpy(&ni->bdaddr, &hdev->bdaddr); | |
320 | memcpy(ni->name, hdev->name, 8); | |
321 | ||
dcf4adbf | 322 | opcode = cpu_to_le16(HCI_MON_NEW_INDEX); |
cd82e61c MH |
323 | break; |
324 | ||
325 | case HCI_DEV_UNREG: | |
326 | skb = bt_skb_alloc(0, GFP_ATOMIC); | |
327 | if (!skb) | |
328 | return NULL; | |
329 | ||
dcf4adbf | 330 | opcode = cpu_to_le16(HCI_MON_DEL_INDEX); |
cd82e61c MH |
331 | break; |
332 | ||
6c566dd5 MH |
333 | case HCI_DEV_UP: |
334 | skb = bt_skb_alloc(HCI_MON_INDEX_INFO_SIZE, GFP_ATOMIC); | |
335 | if (!skb) | |
336 | return NULL; | |
337 | ||
338 | ii = (void *)skb_put(skb, HCI_MON_INDEX_INFO_SIZE); | |
339 | bacpy(&ii->bdaddr, &hdev->bdaddr); | |
340 | ii->manufacturer = cpu_to_le16(hdev->manufacturer); | |
341 | ||
342 | opcode = cpu_to_le16(HCI_MON_INDEX_INFO); | |
343 | break; | |
344 | ||
22db3cbc MH |
345 | case HCI_DEV_OPEN: |
346 | skb = bt_skb_alloc(0, GFP_ATOMIC); | |
347 | if (!skb) | |
348 | return NULL; | |
349 | ||
350 | opcode = cpu_to_le16(HCI_MON_OPEN_INDEX); | |
351 | break; | |
352 | ||
353 | case HCI_DEV_CLOSE: | |
354 | skb = bt_skb_alloc(0, GFP_ATOMIC); | |
355 | if (!skb) | |
356 | return NULL; | |
357 | ||
358 | opcode = cpu_to_le16(HCI_MON_CLOSE_INDEX); | |
359 | break; | |
360 | ||
cd82e61c MH |
361 | default: |
362 | return NULL; | |
363 | } | |
364 | ||
365 | __net_timestamp(skb); | |
366 | ||
367 | hdr = (void *) skb_push(skb, HCI_MON_HDR_SIZE); | |
368 | hdr->opcode = opcode; | |
369 | hdr->index = cpu_to_le16(hdev->id); | |
370 | hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); | |
371 | ||
372 | return skb; | |
373 | } | |
374 | ||
375 | static void send_monitor_replay(struct sock *sk) | |
376 | { | |
377 | struct hci_dev *hdev; | |
378 | ||
379 | read_lock(&hci_dev_list_lock); | |
380 | ||
381 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
382 | struct sk_buff *skb; | |
383 | ||
384 | skb = create_monitor_event(hdev, HCI_DEV_REG); | |
385 | if (!skb) | |
386 | continue; | |
387 | ||
388 | if (sock_queue_rcv_skb(sk, skb)) | |
389 | kfree_skb(skb); | |
22db3cbc MH |
390 | |
391 | if (!test_bit(HCI_RUNNING, &hdev->flags)) | |
392 | continue; | |
393 | ||
394 | skb = create_monitor_event(hdev, HCI_DEV_OPEN); | |
395 | if (!skb) | |
396 | continue; | |
397 | ||
398 | if (sock_queue_rcv_skb(sk, skb)) | |
399 | kfree_skb(skb); | |
6c566dd5 MH |
400 | |
401 | if (!test_bit(HCI_UP, &hdev->flags)) | |
402 | continue; | |
403 | ||
404 | skb = create_monitor_event(hdev, HCI_DEV_UP); | |
405 | if (!skb) | |
406 | continue; | |
407 | ||
408 | if (sock_queue_rcv_skb(sk, skb)) | |
409 | kfree_skb(skb); | |
cd82e61c MH |
410 | } |
411 | ||
412 | read_unlock(&hci_dev_list_lock); | |
413 | } | |
414 | ||
040030ef MH |
415 | /* Generate internal stack event */ |
416 | static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data) | |
417 | { | |
418 | struct hci_event_hdr *hdr; | |
419 | struct hci_ev_stack_internal *ev; | |
420 | struct sk_buff *skb; | |
421 | ||
422 | skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC); | |
423 | if (!skb) | |
424 | return; | |
425 | ||
426 | hdr = (void *) skb_put(skb, HCI_EVENT_HDR_SIZE); | |
427 | hdr->evt = HCI_EV_STACK_INTERNAL; | |
428 | hdr->plen = sizeof(*ev) + dlen; | |
429 | ||
430 | ev = (void *) skb_put(skb, sizeof(*ev) + dlen); | |
431 | ev->type = type; | |
432 | memcpy(ev->data, data, dlen); | |
433 | ||
434 | bt_cb(skb)->incoming = 1; | |
435 | __net_timestamp(skb); | |
436 | ||
437 | bt_cb(skb)->pkt_type = HCI_EVENT_PKT; | |
040030ef MH |
438 | hci_send_to_sock(hdev, skb); |
439 | kfree_skb(skb); | |
440 | } | |
441 | ||
442 | void hci_sock_dev_event(struct hci_dev *hdev, int event) | |
443 | { | |
040030ef MH |
444 | BT_DBG("hdev %s event %d", hdev->name, event); |
445 | ||
cd82e61c MH |
446 | if (atomic_read(&monitor_promisc)) { |
447 | struct sk_buff *skb; | |
448 | ||
ed1b28a4 | 449 | /* Send event to monitor */ |
cd82e61c MH |
450 | skb = create_monitor_event(hdev, event); |
451 | if (skb) { | |
c08b1a1d MH |
452 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, |
453 | HCI_SOCK_TRUSTED, NULL); | |
cd82e61c MH |
454 | kfree_skb(skb); |
455 | } | |
456 | } | |
457 | ||
ed1b28a4 MH |
458 | if (event <= HCI_DEV_DOWN) { |
459 | struct hci_ev_si_device ev; | |
460 | ||
461 | /* Send event to sockets */ | |
462 | ev.event = event; | |
463 | ev.dev_id = hdev->id; | |
464 | hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev); | |
465 | } | |
040030ef MH |
466 | |
467 | if (event == HCI_DEV_UNREG) { | |
468 | struct sock *sk; | |
040030ef MH |
469 | |
470 | /* Detach sockets from device */ | |
471 | read_lock(&hci_sk_list.lock); | |
b67bfe0d | 472 | sk_for_each(sk, &hci_sk_list.head) { |
040030ef MH |
473 | bh_lock_sock_nested(sk); |
474 | if (hci_pi(sk)->hdev == hdev) { | |
475 | hci_pi(sk)->hdev = NULL; | |
476 | sk->sk_err = EPIPE; | |
477 | sk->sk_state = BT_OPEN; | |
478 | sk->sk_state_change(sk); | |
479 | ||
480 | hci_dev_put(hdev); | |
481 | } | |
482 | bh_unlock_sock(sk); | |
483 | } | |
484 | read_unlock(&hci_sk_list.lock); | |
485 | } | |
486 | } | |
487 | ||
801c1e8d JH |
488 | static struct hci_mgmt_chan *__hci_mgmt_chan_find(unsigned short channel) |
489 | { | |
490 | struct hci_mgmt_chan *c; | |
491 | ||
492 | list_for_each_entry(c, &mgmt_chan_list, list) { | |
493 | if (c->channel == channel) | |
494 | return c; | |
495 | } | |
496 | ||
497 | return NULL; | |
498 | } | |
499 | ||
500 | static struct hci_mgmt_chan *hci_mgmt_chan_find(unsigned short channel) | |
501 | { | |
502 | struct hci_mgmt_chan *c; | |
503 | ||
504 | mutex_lock(&mgmt_chan_list_lock); | |
505 | c = __hci_mgmt_chan_find(channel); | |
506 | mutex_unlock(&mgmt_chan_list_lock); | |
507 | ||
508 | return c; | |
509 | } | |
510 | ||
511 | int hci_mgmt_chan_register(struct hci_mgmt_chan *c) | |
512 | { | |
513 | if (c->channel < HCI_CHANNEL_CONTROL) | |
514 | return -EINVAL; | |
515 | ||
516 | mutex_lock(&mgmt_chan_list_lock); | |
517 | if (__hci_mgmt_chan_find(c->channel)) { | |
518 | mutex_unlock(&mgmt_chan_list_lock); | |
519 | return -EALREADY; | |
520 | } | |
521 | ||
522 | list_add_tail(&c->list, &mgmt_chan_list); | |
523 | ||
524 | mutex_unlock(&mgmt_chan_list_lock); | |
525 | ||
526 | return 0; | |
527 | } | |
528 | EXPORT_SYMBOL(hci_mgmt_chan_register); | |
529 | ||
530 | void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c) | |
531 | { | |
532 | mutex_lock(&mgmt_chan_list_lock); | |
533 | list_del(&c->list); | |
534 | mutex_unlock(&mgmt_chan_list_lock); | |
535 | } | |
536 | EXPORT_SYMBOL(hci_mgmt_chan_unregister); | |
537 | ||
1da177e4 LT |
538 | static int hci_sock_release(struct socket *sock) |
539 | { | |
540 | struct sock *sk = sock->sk; | |
7b005bd3 | 541 | struct hci_dev *hdev; |
1da177e4 LT |
542 | |
543 | BT_DBG("sock %p sk %p", sock, sk); | |
544 | ||
545 | if (!sk) | |
546 | return 0; | |
547 | ||
7b005bd3 MH |
548 | hdev = hci_pi(sk)->hdev; |
549 | ||
cd82e61c MH |
550 | if (hci_pi(sk)->channel == HCI_CHANNEL_MONITOR) |
551 | atomic_dec(&monitor_promisc); | |
552 | ||
1da177e4 LT |
553 | bt_sock_unlink(&hci_sk_list, sk); |
554 | ||
555 | if (hdev) { | |
23500189 | 556 | if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { |
6b3cc1db SF |
557 | /* When releasing an user channel exclusive access, |
558 | * call hci_dev_do_close directly instead of calling | |
559 | * hci_dev_close to ensure the exclusive access will | |
560 | * be released and the controller brought back down. | |
561 | * | |
562 | * The checking of HCI_AUTO_OFF is not needed in this | |
563 | * case since it will have been cleared already when | |
564 | * opening the user channel. | |
565 | */ | |
566 | hci_dev_do_close(hdev); | |
9380f9ea LP |
567 | hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); |
568 | mgmt_index_added(hdev); | |
23500189 MH |
569 | } |
570 | ||
1da177e4 LT |
571 | atomic_dec(&hdev->promisc); |
572 | hci_dev_put(hdev); | |
573 | } | |
574 | ||
575 | sock_orphan(sk); | |
576 | ||
577 | skb_queue_purge(&sk->sk_receive_queue); | |
578 | skb_queue_purge(&sk->sk_write_queue); | |
579 | ||
580 | sock_put(sk); | |
581 | return 0; | |
582 | } | |
583 | ||
b2a66aad | 584 | static int hci_sock_blacklist_add(struct hci_dev *hdev, void __user *arg) |
f0358568 JH |
585 | { |
586 | bdaddr_t bdaddr; | |
5e762444 | 587 | int err; |
f0358568 JH |
588 | |
589 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
590 | return -EFAULT; | |
591 | ||
09fd0de5 | 592 | hci_dev_lock(hdev); |
5e762444 | 593 | |
dcc36c16 | 594 | err = hci_bdaddr_list_add(&hdev->blacklist, &bdaddr, BDADDR_BREDR); |
5e762444 | 595 | |
09fd0de5 | 596 | hci_dev_unlock(hdev); |
5e762444 AJ |
597 | |
598 | return err; | |
f0358568 JH |
599 | } |
600 | ||
b2a66aad | 601 | static int hci_sock_blacklist_del(struct hci_dev *hdev, void __user *arg) |
f0358568 JH |
602 | { |
603 | bdaddr_t bdaddr; | |
5e762444 | 604 | int err; |
f0358568 JH |
605 | |
606 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
607 | return -EFAULT; | |
608 | ||
09fd0de5 | 609 | hci_dev_lock(hdev); |
5e762444 | 610 | |
dcc36c16 | 611 | err = hci_bdaddr_list_del(&hdev->blacklist, &bdaddr, BDADDR_BREDR); |
5e762444 | 612 | |
09fd0de5 | 613 | hci_dev_unlock(hdev); |
5e762444 AJ |
614 | |
615 | return err; | |
f0358568 JH |
616 | } |
617 | ||
8e87d142 | 618 | /* Ioctls that require bound socket */ |
6039aa73 GP |
619 | static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, |
620 | unsigned long arg) | |
1da177e4 LT |
621 | { |
622 | struct hci_dev *hdev = hci_pi(sk)->hdev; | |
623 | ||
624 | if (!hdev) | |
625 | return -EBADFD; | |
626 | ||
d7a5a11d | 627 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) |
0736cfa8 MH |
628 | return -EBUSY; |
629 | ||
d7a5a11d | 630 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) |
fee746b0 MH |
631 | return -EOPNOTSUPP; |
632 | ||
5b69bef5 MH |
633 | if (hdev->dev_type != HCI_BREDR) |
634 | return -EOPNOTSUPP; | |
635 | ||
1da177e4 LT |
636 | switch (cmd) { |
637 | case HCISETRAW: | |
638 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 639 | return -EPERM; |
db596681 | 640 | return -EOPNOTSUPP; |
1da177e4 | 641 | |
1da177e4 | 642 | case HCIGETCONNINFO: |
40be492f MH |
643 | return hci_get_conn_info(hdev, (void __user *) arg); |
644 | ||
645 | case HCIGETAUTHINFO: | |
646 | return hci_get_auth_info(hdev, (void __user *) arg); | |
1da177e4 | 647 | |
f0358568 JH |
648 | case HCIBLOCKADDR: |
649 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 650 | return -EPERM; |
b2a66aad | 651 | return hci_sock_blacklist_add(hdev, (void __user *) arg); |
f0358568 JH |
652 | |
653 | case HCIUNBLOCKADDR: | |
654 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 655 | return -EPERM; |
b2a66aad | 656 | return hci_sock_blacklist_del(hdev, (void __user *) arg); |
1da177e4 | 657 | } |
0736cfa8 | 658 | |
324d36ed | 659 | return -ENOIOCTLCMD; |
1da177e4 LT |
660 | } |
661 | ||
8fc9ced3 GP |
662 | static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, |
663 | unsigned long arg) | |
1da177e4 | 664 | { |
40be492f | 665 | void __user *argp = (void __user *) arg; |
0736cfa8 | 666 | struct sock *sk = sock->sk; |
1da177e4 LT |
667 | int err; |
668 | ||
669 | BT_DBG("cmd %x arg %lx", cmd, arg); | |
670 | ||
c1c4f956 MH |
671 | lock_sock(sk); |
672 | ||
673 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { | |
674 | err = -EBADFD; | |
675 | goto done; | |
676 | } | |
677 | ||
678 | release_sock(sk); | |
679 | ||
1da177e4 LT |
680 | switch (cmd) { |
681 | case HCIGETDEVLIST: | |
682 | return hci_get_dev_list(argp); | |
683 | ||
684 | case HCIGETDEVINFO: | |
685 | return hci_get_dev_info(argp); | |
686 | ||
687 | case HCIGETCONNLIST: | |
688 | return hci_get_conn_list(argp); | |
689 | ||
690 | case HCIDEVUP: | |
691 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 692 | return -EPERM; |
1da177e4 LT |
693 | return hci_dev_open(arg); |
694 | ||
695 | case HCIDEVDOWN: | |
696 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 697 | return -EPERM; |
1da177e4 LT |
698 | return hci_dev_close(arg); |
699 | ||
700 | case HCIDEVRESET: | |
701 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 702 | return -EPERM; |
1da177e4 LT |
703 | return hci_dev_reset(arg); |
704 | ||
705 | case HCIDEVRESTAT: | |
706 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 707 | return -EPERM; |
1da177e4 LT |
708 | return hci_dev_reset_stat(arg); |
709 | ||
710 | case HCISETSCAN: | |
711 | case HCISETAUTH: | |
712 | case HCISETENCRYPT: | |
713 | case HCISETPTYPE: | |
714 | case HCISETLINKPOL: | |
715 | case HCISETLINKMODE: | |
716 | case HCISETACLMTU: | |
717 | case HCISETSCOMTU: | |
718 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 719 | return -EPERM; |
1da177e4 LT |
720 | return hci_dev_cmd(cmd, argp); |
721 | ||
722 | case HCIINQUIRY: | |
723 | return hci_inquiry(argp); | |
1da177e4 | 724 | } |
c1c4f956 MH |
725 | |
726 | lock_sock(sk); | |
727 | ||
728 | err = hci_sock_bound_ioctl(sk, cmd, arg); | |
729 | ||
730 | done: | |
731 | release_sock(sk); | |
732 | return err; | |
1da177e4 LT |
733 | } |
734 | ||
8fc9ced3 GP |
735 | static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, |
736 | int addr_len) | |
1da177e4 | 737 | { |
0381101f | 738 | struct sockaddr_hci haddr; |
1da177e4 LT |
739 | struct sock *sk = sock->sk; |
740 | struct hci_dev *hdev = NULL; | |
0381101f | 741 | int len, err = 0; |
1da177e4 LT |
742 | |
743 | BT_DBG("sock %p sk %p", sock, sk); | |
744 | ||
0381101f JH |
745 | if (!addr) |
746 | return -EINVAL; | |
747 | ||
748 | memset(&haddr, 0, sizeof(haddr)); | |
749 | len = min_t(unsigned int, sizeof(haddr), addr_len); | |
750 | memcpy(&haddr, addr, len); | |
751 | ||
752 | if (haddr.hci_family != AF_BLUETOOTH) | |
753 | return -EINVAL; | |
754 | ||
1da177e4 LT |
755 | lock_sock(sk); |
756 | ||
7cc2ade2 | 757 | if (sk->sk_state == BT_BOUND) { |
1da177e4 LT |
758 | err = -EALREADY; |
759 | goto done; | |
760 | } | |
761 | ||
7cc2ade2 MH |
762 | switch (haddr.hci_channel) { |
763 | case HCI_CHANNEL_RAW: | |
764 | if (hci_pi(sk)->hdev) { | |
765 | err = -EALREADY; | |
1da177e4 LT |
766 | goto done; |
767 | } | |
768 | ||
7cc2ade2 MH |
769 | if (haddr.hci_dev != HCI_DEV_NONE) { |
770 | hdev = hci_dev_get(haddr.hci_dev); | |
771 | if (!hdev) { | |
772 | err = -ENODEV; | |
773 | goto done; | |
774 | } | |
775 | ||
776 | atomic_inc(&hdev->promisc); | |
777 | } | |
778 | ||
779 | hci_pi(sk)->hdev = hdev; | |
780 | break; | |
781 | ||
23500189 MH |
782 | case HCI_CHANNEL_USER: |
783 | if (hci_pi(sk)->hdev) { | |
784 | err = -EALREADY; | |
785 | goto done; | |
786 | } | |
787 | ||
788 | if (haddr.hci_dev == HCI_DEV_NONE) { | |
789 | err = -EINVAL; | |
790 | goto done; | |
791 | } | |
792 | ||
10a8b86f | 793 | if (!capable(CAP_NET_ADMIN)) { |
23500189 MH |
794 | err = -EPERM; |
795 | goto done; | |
796 | } | |
797 | ||
798 | hdev = hci_dev_get(haddr.hci_dev); | |
799 | if (!hdev) { | |
800 | err = -ENODEV; | |
801 | goto done; | |
802 | } | |
803 | ||
781f899f | 804 | if (test_bit(HCI_INIT, &hdev->flags) || |
d7a5a11d | 805 | hci_dev_test_flag(hdev, HCI_SETUP) || |
781f899f MH |
806 | hci_dev_test_flag(hdev, HCI_CONFIG) || |
807 | (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) && | |
808 | test_bit(HCI_UP, &hdev->flags))) { | |
23500189 MH |
809 | err = -EBUSY; |
810 | hci_dev_put(hdev); | |
811 | goto done; | |
812 | } | |
813 | ||
238be788 | 814 | if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) { |
23500189 MH |
815 | err = -EUSERS; |
816 | hci_dev_put(hdev); | |
817 | goto done; | |
818 | } | |
819 | ||
0602a8ad | 820 | mgmt_index_removed(hdev); |
23500189 MH |
821 | |
822 | err = hci_dev_open(hdev->id); | |
823 | if (err) { | |
781f899f MH |
824 | if (err == -EALREADY) { |
825 | /* In case the transport is already up and | |
826 | * running, clear the error here. | |
827 | * | |
828 | * This can happen when opening an user | |
829 | * channel and HCI_AUTO_OFF grace period | |
830 | * is still active. | |
831 | */ | |
832 | err = 0; | |
833 | } else { | |
834 | hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); | |
835 | mgmt_index_added(hdev); | |
836 | hci_dev_put(hdev); | |
837 | goto done; | |
838 | } | |
23500189 MH |
839 | } |
840 | ||
841 | atomic_inc(&hdev->promisc); | |
842 | ||
843 | hci_pi(sk)->hdev = hdev; | |
844 | break; | |
845 | ||
cd82e61c MH |
846 | case HCI_CHANNEL_MONITOR: |
847 | if (haddr.hci_dev != HCI_DEV_NONE) { | |
848 | err = -EINVAL; | |
849 | goto done; | |
850 | } | |
851 | ||
852 | if (!capable(CAP_NET_RAW)) { | |
853 | err = -EPERM; | |
854 | goto done; | |
855 | } | |
856 | ||
50ebc055 MH |
857 | /* The monitor interface is restricted to CAP_NET_RAW |
858 | * capabilities and with that implicitly trusted. | |
859 | */ | |
860 | hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); | |
861 | ||
cd82e61c MH |
862 | send_monitor_replay(sk); |
863 | ||
864 | atomic_inc(&monitor_promisc); | |
865 | break; | |
866 | ||
7cc2ade2 | 867 | default: |
801c1e8d JH |
868 | if (!hci_mgmt_chan_find(haddr.hci_channel)) { |
869 | err = -EINVAL; | |
870 | goto done; | |
871 | } | |
872 | ||
873 | if (haddr.hci_dev != HCI_DEV_NONE) { | |
874 | err = -EINVAL; | |
875 | goto done; | |
876 | } | |
877 | ||
1195fbb8 MH |
878 | /* Users with CAP_NET_ADMIN capabilities are allowed |
879 | * access to all management commands and events. For | |
880 | * untrusted users the interface is restricted and | |
881 | * also only untrusted events are sent. | |
50ebc055 | 882 | */ |
1195fbb8 MH |
883 | if (capable(CAP_NET_ADMIN)) |
884 | hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); | |
50ebc055 | 885 | |
f9207338 MH |
886 | /* At the moment the index and unconfigured index events |
887 | * are enabled unconditionally. Setting them on each | |
888 | * socket when binding keeps this functionality. They | |
889 | * however might be cleared later and then sending of these | |
890 | * events will be disabled, but that is then intentional. | |
f6b7712e MH |
891 | * |
892 | * This also enables generic events that are safe to be | |
893 | * received by untrusted users. Example for such events | |
894 | * are changes to settings, class of device, name etc. | |
f9207338 MH |
895 | */ |
896 | if (haddr.hci_channel == HCI_CHANNEL_CONTROL) { | |
897 | hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS); | |
898 | hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS); | |
f6b7712e | 899 | hci_sock_set_flag(sk, HCI_MGMT_GENERIC_EVENTS); |
f9207338 | 900 | } |
801c1e8d | 901 | break; |
1da177e4 LT |
902 | } |
903 | ||
7cc2ade2 | 904 | |
0381101f | 905 | hci_pi(sk)->channel = haddr.hci_channel; |
1da177e4 LT |
906 | sk->sk_state = BT_BOUND; |
907 | ||
908 | done: | |
909 | release_sock(sk); | |
910 | return err; | |
911 | } | |
912 | ||
8fc9ced3 GP |
913 | static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, |
914 | int *addr_len, int peer) | |
1da177e4 LT |
915 | { |
916 | struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr; | |
917 | struct sock *sk = sock->sk; | |
9d4b68b2 MH |
918 | struct hci_dev *hdev; |
919 | int err = 0; | |
1da177e4 LT |
920 | |
921 | BT_DBG("sock %p sk %p", sock, sk); | |
922 | ||
06f43cbc MH |
923 | if (peer) |
924 | return -EOPNOTSUPP; | |
925 | ||
1da177e4 LT |
926 | lock_sock(sk); |
927 | ||
9d4b68b2 MH |
928 | hdev = hci_pi(sk)->hdev; |
929 | if (!hdev) { | |
930 | err = -EBADFD; | |
931 | goto done; | |
932 | } | |
933 | ||
1da177e4 LT |
934 | *addr_len = sizeof(*haddr); |
935 | haddr->hci_family = AF_BLUETOOTH; | |
7b005bd3 | 936 | haddr->hci_dev = hdev->id; |
9d4b68b2 | 937 | haddr->hci_channel= hci_pi(sk)->channel; |
1da177e4 | 938 | |
9d4b68b2 | 939 | done: |
1da177e4 | 940 | release_sock(sk); |
9d4b68b2 | 941 | return err; |
1da177e4 LT |
942 | } |
943 | ||
6039aa73 GP |
944 | static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, |
945 | struct sk_buff *skb) | |
1da177e4 LT |
946 | { |
947 | __u32 mask = hci_pi(sk)->cmsg_mask; | |
948 | ||
0d48d939 MH |
949 | if (mask & HCI_CMSG_DIR) { |
950 | int incoming = bt_cb(skb)->incoming; | |
8fc9ced3 GP |
951 | put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), |
952 | &incoming); | |
0d48d939 | 953 | } |
1da177e4 | 954 | |
a61bbcf2 | 955 | if (mask & HCI_CMSG_TSTAMP) { |
f6e623a6 JFS |
956 | #ifdef CONFIG_COMPAT |
957 | struct compat_timeval ctv; | |
958 | #endif | |
a61bbcf2 | 959 | struct timeval tv; |
767c5eb5 MH |
960 | void *data; |
961 | int len; | |
a61bbcf2 PM |
962 | |
963 | skb_get_timestamp(skb, &tv); | |
767c5eb5 | 964 | |
1da97f83 DM |
965 | data = &tv; |
966 | len = sizeof(tv); | |
967 | #ifdef CONFIG_COMPAT | |
da88cea1 L |
968 | if (!COMPAT_USE_64BIT_TIME && |
969 | (msg->msg_flags & MSG_CMSG_COMPAT)) { | |
767c5eb5 MH |
970 | ctv.tv_sec = tv.tv_sec; |
971 | ctv.tv_usec = tv.tv_usec; | |
972 | data = &ctv; | |
973 | len = sizeof(ctv); | |
767c5eb5 | 974 | } |
1da97f83 | 975 | #endif |
767c5eb5 MH |
976 | |
977 | put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data); | |
a61bbcf2 | 978 | } |
1da177e4 | 979 | } |
8e87d142 | 980 | |
1b784140 YX |
981 | static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
982 | int flags) | |
1da177e4 LT |
983 | { |
984 | int noblock = flags & MSG_DONTWAIT; | |
985 | struct sock *sk = sock->sk; | |
986 | struct sk_buff *skb; | |
987 | int copied, err; | |
988 | ||
989 | BT_DBG("sock %p, sk %p", sock, sk); | |
990 | ||
991 | if (flags & (MSG_OOB)) | |
992 | return -EOPNOTSUPP; | |
993 | ||
994 | if (sk->sk_state == BT_CLOSED) | |
995 | return 0; | |
996 | ||
70f23020 AE |
997 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
998 | if (!skb) | |
1da177e4 LT |
999 | return err; |
1000 | ||
1da177e4 LT |
1001 | copied = skb->len; |
1002 | if (len < copied) { | |
1003 | msg->msg_flags |= MSG_TRUNC; | |
1004 | copied = len; | |
1005 | } | |
1006 | ||
badff6d0 | 1007 | skb_reset_transport_header(skb); |
51f3d02b | 1008 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 | 1009 | |
3a208627 MH |
1010 | switch (hci_pi(sk)->channel) { |
1011 | case HCI_CHANNEL_RAW: | |
1012 | hci_sock_cmsg(sk, msg, skb); | |
1013 | break; | |
23500189 | 1014 | case HCI_CHANNEL_USER: |
cd82e61c MH |
1015 | case HCI_CHANNEL_MONITOR: |
1016 | sock_recv_timestamp(msg, sk, skb); | |
1017 | break; | |
801c1e8d JH |
1018 | default: |
1019 | if (hci_mgmt_chan_find(hci_pi(sk)->channel)) | |
1020 | sock_recv_timestamp(msg, sk, skb); | |
1021 | break; | |
3a208627 | 1022 | } |
1da177e4 LT |
1023 | |
1024 | skb_free_datagram(sk, skb); | |
1025 | ||
1026 | return err ? : copied; | |
1027 | } | |
1028 | ||
fa4335d7 JH |
1029 | static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk, |
1030 | struct msghdr *msg, size_t msglen) | |
1031 | { | |
1032 | void *buf; | |
1033 | u8 *cp; | |
1034 | struct mgmt_hdr *hdr; | |
1035 | u16 opcode, index, len; | |
1036 | struct hci_dev *hdev = NULL; | |
1037 | const struct hci_mgmt_handler *handler; | |
1038 | bool var_len, no_hdev; | |
1039 | int err; | |
1040 | ||
1041 | BT_DBG("got %zu bytes", msglen); | |
1042 | ||
1043 | if (msglen < sizeof(*hdr)) | |
1044 | return -EINVAL; | |
1045 | ||
1046 | buf = kmalloc(msglen, GFP_KERNEL); | |
1047 | if (!buf) | |
1048 | return -ENOMEM; | |
1049 | ||
1050 | if (memcpy_from_msg(buf, msg, msglen)) { | |
1051 | err = -EFAULT; | |
1052 | goto done; | |
1053 | } | |
1054 | ||
1055 | hdr = buf; | |
1056 | opcode = __le16_to_cpu(hdr->opcode); | |
1057 | index = __le16_to_cpu(hdr->index); | |
1058 | len = __le16_to_cpu(hdr->len); | |
1059 | ||
1060 | if (len != msglen - sizeof(*hdr)) { | |
1061 | err = -EINVAL; | |
1062 | goto done; | |
1063 | } | |
1064 | ||
1065 | if (opcode >= chan->handler_count || | |
1066 | chan->handlers[opcode].func == NULL) { | |
1067 | BT_DBG("Unknown op %u", opcode); | |
1068 | err = mgmt_cmd_status(sk, index, opcode, | |
1069 | MGMT_STATUS_UNKNOWN_COMMAND); | |
1070 | goto done; | |
1071 | } | |
1072 | ||
1073 | handler = &chan->handlers[opcode]; | |
1074 | ||
1075 | if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) && | |
1076 | !(handler->flags & HCI_MGMT_UNTRUSTED)) { | |
1077 | err = mgmt_cmd_status(sk, index, opcode, | |
1078 | MGMT_STATUS_PERMISSION_DENIED); | |
1079 | goto done; | |
1080 | } | |
1081 | ||
1082 | if (index != MGMT_INDEX_NONE) { | |
1083 | hdev = hci_dev_get(index); | |
1084 | if (!hdev) { | |
1085 | err = mgmt_cmd_status(sk, index, opcode, | |
1086 | MGMT_STATUS_INVALID_INDEX); | |
1087 | goto done; | |
1088 | } | |
1089 | ||
1090 | if (hci_dev_test_flag(hdev, HCI_SETUP) || | |
1091 | hci_dev_test_flag(hdev, HCI_CONFIG) || | |
1092 | hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { | |
1093 | err = mgmt_cmd_status(sk, index, opcode, | |
1094 | MGMT_STATUS_INVALID_INDEX); | |
1095 | goto done; | |
1096 | } | |
1097 | ||
1098 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) && | |
1099 | !(handler->flags & HCI_MGMT_UNCONFIGURED)) { | |
1100 | err = mgmt_cmd_status(sk, index, opcode, | |
1101 | MGMT_STATUS_INVALID_INDEX); | |
1102 | goto done; | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | no_hdev = (handler->flags & HCI_MGMT_NO_HDEV); | |
1107 | if (no_hdev != !hdev) { | |
1108 | err = mgmt_cmd_status(sk, index, opcode, | |
1109 | MGMT_STATUS_INVALID_INDEX); | |
1110 | goto done; | |
1111 | } | |
1112 | ||
1113 | var_len = (handler->flags & HCI_MGMT_VAR_LEN); | |
1114 | if ((var_len && len < handler->data_len) || | |
1115 | (!var_len && len != handler->data_len)) { | |
1116 | err = mgmt_cmd_status(sk, index, opcode, | |
1117 | MGMT_STATUS_INVALID_PARAMS); | |
1118 | goto done; | |
1119 | } | |
1120 | ||
1121 | if (hdev && chan->hdev_init) | |
1122 | chan->hdev_init(sk, hdev); | |
1123 | ||
1124 | cp = buf + sizeof(*hdr); | |
1125 | ||
1126 | err = handler->func(sk, hdev, cp, len); | |
1127 | if (err < 0) | |
1128 | goto done; | |
1129 | ||
1130 | err = msglen; | |
1131 | ||
1132 | done: | |
1133 | if (hdev) | |
1134 | hci_dev_put(hdev); | |
1135 | ||
1136 | kfree(buf); | |
1137 | return err; | |
1138 | } | |
1139 | ||
1b784140 YX |
1140 | static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
1141 | size_t len) | |
1da177e4 LT |
1142 | { |
1143 | struct sock *sk = sock->sk; | |
801c1e8d | 1144 | struct hci_mgmt_chan *chan; |
1da177e4 LT |
1145 | struct hci_dev *hdev; |
1146 | struct sk_buff *skb; | |
1147 | int err; | |
1148 | ||
1149 | BT_DBG("sock %p sk %p", sock, sk); | |
1150 | ||
1151 | if (msg->msg_flags & MSG_OOB) | |
1152 | return -EOPNOTSUPP; | |
1153 | ||
1154 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE)) | |
1155 | return -EINVAL; | |
1156 | ||
1157 | if (len < 4 || len > HCI_MAX_FRAME_SIZE) | |
1158 | return -EINVAL; | |
1159 | ||
1160 | lock_sock(sk); | |
1161 | ||
0381101f JH |
1162 | switch (hci_pi(sk)->channel) { |
1163 | case HCI_CHANNEL_RAW: | |
23500189 | 1164 | case HCI_CHANNEL_USER: |
0381101f | 1165 | break; |
cd82e61c MH |
1166 | case HCI_CHANNEL_MONITOR: |
1167 | err = -EOPNOTSUPP; | |
1168 | goto done; | |
0381101f | 1169 | default: |
801c1e8d JH |
1170 | mutex_lock(&mgmt_chan_list_lock); |
1171 | chan = __hci_mgmt_chan_find(hci_pi(sk)->channel); | |
1172 | if (chan) | |
fa4335d7 | 1173 | err = hci_mgmt_cmd(chan, sk, msg, len); |
801c1e8d JH |
1174 | else |
1175 | err = -EINVAL; | |
1176 | ||
1177 | mutex_unlock(&mgmt_chan_list_lock); | |
0381101f JH |
1178 | goto done; |
1179 | } | |
1180 | ||
70f23020 AE |
1181 | hdev = hci_pi(sk)->hdev; |
1182 | if (!hdev) { | |
1da177e4 LT |
1183 | err = -EBADFD; |
1184 | goto done; | |
1185 | } | |
1186 | ||
7e21addc MH |
1187 | if (!test_bit(HCI_UP, &hdev->flags)) { |
1188 | err = -ENETDOWN; | |
1189 | goto done; | |
1190 | } | |
1191 | ||
70f23020 AE |
1192 | skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err); |
1193 | if (!skb) | |
1da177e4 LT |
1194 | goto done; |
1195 | ||
6ce8e9ce | 1196 | if (memcpy_from_msg(skb_put(skb, len), msg, len)) { |
1da177e4 LT |
1197 | err = -EFAULT; |
1198 | goto drop; | |
1199 | } | |
1200 | ||
0d48d939 | 1201 | bt_cb(skb)->pkt_type = *((unsigned char *) skb->data); |
1da177e4 | 1202 | skb_pull(skb, 1); |
1da177e4 | 1203 | |
1bc5ad16 MH |
1204 | if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { |
1205 | /* No permission check is needed for user channel | |
1206 | * since that gets enforced when binding the socket. | |
1207 | * | |
1208 | * However check that the packet type is valid. | |
1209 | */ | |
1210 | if (bt_cb(skb)->pkt_type != HCI_COMMAND_PKT && | |
1211 | bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT && | |
1212 | bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) { | |
1213 | err = -EINVAL; | |
1214 | goto drop; | |
1215 | } | |
1216 | ||
1217 | skb_queue_tail(&hdev->raw_q, skb); | |
1218 | queue_work(hdev->workqueue, &hdev->tx_work); | |
1219 | } else if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) { | |
83985319 | 1220 | u16 opcode = get_unaligned_le16(skb->data); |
1da177e4 LT |
1221 | u16 ogf = hci_opcode_ogf(opcode); |
1222 | u16 ocf = hci_opcode_ocf(opcode); | |
1223 | ||
1224 | if (((ogf > HCI_SFLT_MAX_OGF) || | |
3bb3c755 GP |
1225 | !hci_test_bit(ocf & HCI_FLT_OCF_BITS, |
1226 | &hci_sec_filter.ocf_mask[ogf])) && | |
1227 | !capable(CAP_NET_RAW)) { | |
1da177e4 LT |
1228 | err = -EPERM; |
1229 | goto drop; | |
1230 | } | |
1231 | ||
fee746b0 | 1232 | if (ogf == 0x3f) { |
1da177e4 | 1233 | skb_queue_tail(&hdev->raw_q, skb); |
3eff45ea | 1234 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 | 1235 | } else { |
49c922bb | 1236 | /* Stand-alone HCI commands must be flagged as |
11714b3d JH |
1237 | * single-command requests. |
1238 | */ | |
db6e3e8d | 1239 | bt_cb(skb)->req.start = true; |
11714b3d | 1240 | |
1da177e4 | 1241 | skb_queue_tail(&hdev->cmd_q, skb); |
c347b765 | 1242 | queue_work(hdev->workqueue, &hdev->cmd_work); |
1da177e4 LT |
1243 | } |
1244 | } else { | |
1245 | if (!capable(CAP_NET_RAW)) { | |
1246 | err = -EPERM; | |
1247 | goto drop; | |
1248 | } | |
1249 | ||
1250 | skb_queue_tail(&hdev->raw_q, skb); | |
3eff45ea | 1251 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | err = len; | |
1255 | ||
1256 | done: | |
1257 | release_sock(sk); | |
1258 | return err; | |
1259 | ||
1260 | drop: | |
1261 | kfree_skb(skb); | |
1262 | goto done; | |
1263 | } | |
1264 | ||
8fc9ced3 GP |
1265 | static int hci_sock_setsockopt(struct socket *sock, int level, int optname, |
1266 | char __user *optval, unsigned int len) | |
1da177e4 LT |
1267 | { |
1268 | struct hci_ufilter uf = { .opcode = 0 }; | |
1269 | struct sock *sk = sock->sk; | |
1270 | int err = 0, opt = 0; | |
1271 | ||
1272 | BT_DBG("sk %p, opt %d", sk, optname); | |
1273 | ||
1274 | lock_sock(sk); | |
1275 | ||
2f39cdb7 | 1276 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { |
c2371e80 | 1277 | err = -EBADFD; |
2f39cdb7 MH |
1278 | goto done; |
1279 | } | |
1280 | ||
1da177e4 LT |
1281 | switch (optname) { |
1282 | case HCI_DATA_DIR: | |
1283 | if (get_user(opt, (int __user *)optval)) { | |
1284 | err = -EFAULT; | |
1285 | break; | |
1286 | } | |
1287 | ||
1288 | if (opt) | |
1289 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR; | |
1290 | else | |
1291 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR; | |
1292 | break; | |
1293 | ||
1294 | case HCI_TIME_STAMP: | |
1295 | if (get_user(opt, (int __user *)optval)) { | |
1296 | err = -EFAULT; | |
1297 | break; | |
1298 | } | |
1299 | ||
1300 | if (opt) | |
1301 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP; | |
1302 | else | |
1303 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP; | |
1304 | break; | |
1305 | ||
1306 | case HCI_FILTER: | |
0878b666 MH |
1307 | { |
1308 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1309 | ||
1310 | uf.type_mask = f->type_mask; | |
1311 | uf.opcode = f->opcode; | |
1312 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
1313 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
1314 | } | |
1315 | ||
1da177e4 LT |
1316 | len = min_t(unsigned int, len, sizeof(uf)); |
1317 | if (copy_from_user(&uf, optval, len)) { | |
1318 | err = -EFAULT; | |
1319 | break; | |
1320 | } | |
1321 | ||
1322 | if (!capable(CAP_NET_RAW)) { | |
1323 | uf.type_mask &= hci_sec_filter.type_mask; | |
1324 | uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0); | |
1325 | uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1); | |
1326 | } | |
1327 | ||
1328 | { | |
1329 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1330 | ||
1331 | f->type_mask = uf.type_mask; | |
1332 | f->opcode = uf.opcode; | |
1333 | *((u32 *) f->event_mask + 0) = uf.event_mask[0]; | |
1334 | *((u32 *) f->event_mask + 1) = uf.event_mask[1]; | |
1335 | } | |
8e87d142 | 1336 | break; |
1da177e4 LT |
1337 | |
1338 | default: | |
1339 | err = -ENOPROTOOPT; | |
1340 | break; | |
1341 | } | |
1342 | ||
2f39cdb7 | 1343 | done: |
1da177e4 LT |
1344 | release_sock(sk); |
1345 | return err; | |
1346 | } | |
1347 | ||
8fc9ced3 GP |
1348 | static int hci_sock_getsockopt(struct socket *sock, int level, int optname, |
1349 | char __user *optval, int __user *optlen) | |
1da177e4 LT |
1350 | { |
1351 | struct hci_ufilter uf; | |
1352 | struct sock *sk = sock->sk; | |
cedc5469 MH |
1353 | int len, opt, err = 0; |
1354 | ||
1355 | BT_DBG("sk %p, opt %d", sk, optname); | |
1da177e4 LT |
1356 | |
1357 | if (get_user(len, optlen)) | |
1358 | return -EFAULT; | |
1359 | ||
cedc5469 MH |
1360 | lock_sock(sk); |
1361 | ||
1362 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { | |
c2371e80 | 1363 | err = -EBADFD; |
cedc5469 MH |
1364 | goto done; |
1365 | } | |
1366 | ||
1da177e4 LT |
1367 | switch (optname) { |
1368 | case HCI_DATA_DIR: | |
1369 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR) | |
1370 | opt = 1; | |
8e87d142 | 1371 | else |
1da177e4 LT |
1372 | opt = 0; |
1373 | ||
1374 | if (put_user(opt, optval)) | |
cedc5469 | 1375 | err = -EFAULT; |
1da177e4 LT |
1376 | break; |
1377 | ||
1378 | case HCI_TIME_STAMP: | |
1379 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP) | |
1380 | opt = 1; | |
8e87d142 | 1381 | else |
1da177e4 LT |
1382 | opt = 0; |
1383 | ||
1384 | if (put_user(opt, optval)) | |
cedc5469 | 1385 | err = -EFAULT; |
1da177e4 LT |
1386 | break; |
1387 | ||
1388 | case HCI_FILTER: | |
1389 | { | |
1390 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1391 | ||
e15ca9a0 | 1392 | memset(&uf, 0, sizeof(uf)); |
1da177e4 LT |
1393 | uf.type_mask = f->type_mask; |
1394 | uf.opcode = f->opcode; | |
1395 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
1396 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
1397 | } | |
1398 | ||
1399 | len = min_t(unsigned int, len, sizeof(uf)); | |
1400 | if (copy_to_user(optval, &uf, len)) | |
cedc5469 | 1401 | err = -EFAULT; |
1da177e4 LT |
1402 | break; |
1403 | ||
1404 | default: | |
cedc5469 | 1405 | err = -ENOPROTOOPT; |
1da177e4 LT |
1406 | break; |
1407 | } | |
1408 | ||
cedc5469 MH |
1409 | done: |
1410 | release_sock(sk); | |
1411 | return err; | |
1da177e4 LT |
1412 | } |
1413 | ||
90ddc4f0 | 1414 | static const struct proto_ops hci_sock_ops = { |
1da177e4 LT |
1415 | .family = PF_BLUETOOTH, |
1416 | .owner = THIS_MODULE, | |
1417 | .release = hci_sock_release, | |
1418 | .bind = hci_sock_bind, | |
1419 | .getname = hci_sock_getname, | |
1420 | .sendmsg = hci_sock_sendmsg, | |
1421 | .recvmsg = hci_sock_recvmsg, | |
1422 | .ioctl = hci_sock_ioctl, | |
1423 | .poll = datagram_poll, | |
1424 | .listen = sock_no_listen, | |
1425 | .shutdown = sock_no_shutdown, | |
1426 | .setsockopt = hci_sock_setsockopt, | |
1427 | .getsockopt = hci_sock_getsockopt, | |
1428 | .connect = sock_no_connect, | |
1429 | .socketpair = sock_no_socketpair, | |
1430 | .accept = sock_no_accept, | |
1431 | .mmap = sock_no_mmap | |
1432 | }; | |
1433 | ||
1434 | static struct proto hci_sk_proto = { | |
1435 | .name = "HCI", | |
1436 | .owner = THIS_MODULE, | |
1437 | .obj_size = sizeof(struct hci_pinfo) | |
1438 | }; | |
1439 | ||
3f378b68 EP |
1440 | static int hci_sock_create(struct net *net, struct socket *sock, int protocol, |
1441 | int kern) | |
1da177e4 LT |
1442 | { |
1443 | struct sock *sk; | |
1444 | ||
1445 | BT_DBG("sock %p", sock); | |
1446 | ||
1447 | if (sock->type != SOCK_RAW) | |
1448 | return -ESOCKTNOSUPPORT; | |
1449 | ||
1450 | sock->ops = &hci_sock_ops; | |
1451 | ||
11aa9c28 | 1452 | sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern); |
1da177e4 LT |
1453 | if (!sk) |
1454 | return -ENOMEM; | |
1455 | ||
1456 | sock_init_data(sock, sk); | |
1457 | ||
1458 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1459 | ||
1460 | sk->sk_protocol = protocol; | |
1461 | ||
1462 | sock->state = SS_UNCONNECTED; | |
1463 | sk->sk_state = BT_OPEN; | |
1464 | ||
1465 | bt_sock_link(&hci_sk_list, sk); | |
1466 | return 0; | |
1467 | } | |
1468 | ||
ec1b4cf7 | 1469 | static const struct net_proto_family hci_sock_family_ops = { |
1da177e4 LT |
1470 | .family = PF_BLUETOOTH, |
1471 | .owner = THIS_MODULE, | |
1472 | .create = hci_sock_create, | |
1473 | }; | |
1474 | ||
1da177e4 LT |
1475 | int __init hci_sock_init(void) |
1476 | { | |
1477 | int err; | |
1478 | ||
b0a8e282 MH |
1479 | BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr)); |
1480 | ||
1da177e4 LT |
1481 | err = proto_register(&hci_sk_proto, 0); |
1482 | if (err < 0) | |
1483 | return err; | |
1484 | ||
1485 | err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops); | |
f7c86637 MY |
1486 | if (err < 0) { |
1487 | BT_ERR("HCI socket registration failed"); | |
1da177e4 | 1488 | goto error; |
f7c86637 MY |
1489 | } |
1490 | ||
b0316615 | 1491 | err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL); |
f7c86637 MY |
1492 | if (err < 0) { |
1493 | BT_ERR("Failed to create HCI proc file"); | |
1494 | bt_sock_unregister(BTPROTO_HCI); | |
1495 | goto error; | |
1496 | } | |
1da177e4 | 1497 | |
1da177e4 LT |
1498 | BT_INFO("HCI socket layer initialized"); |
1499 | ||
1500 | return 0; | |
1501 | ||
1502 | error: | |
1da177e4 LT |
1503 | proto_unregister(&hci_sk_proto); |
1504 | return err; | |
1505 | } | |
1506 | ||
b7440a14 | 1507 | void hci_sock_cleanup(void) |
1da177e4 | 1508 | { |
f7c86637 | 1509 | bt_procfs_cleanup(&init_net, "hci"); |
5e9d7f86 | 1510 | bt_sock_unregister(BTPROTO_HCI); |
1da177e4 | 1511 | proto_unregister(&hci_sk_proto); |
1da177e4 | 1512 | } |