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 | 172 | if (hci_pi(sk)->channel == HCI_CHANNEL_RAW) { |
bb77543e MH |
173 | if (bt_cb(skb)->pkt_type != HCI_COMMAND_PKT && |
174 | bt_cb(skb)->pkt_type != HCI_EVENT_PKT && | |
175 | bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT && | |
176 | bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) | |
177 | continue; | |
23500189 MH |
178 | if (is_filtered_packet(sk, skb)) |
179 | continue; | |
180 | } else if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { | |
181 | if (!bt_cb(skb)->incoming) | |
182 | continue; | |
183 | if (bt_cb(skb)->pkt_type != HCI_EVENT_PKT && | |
184 | bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT && | |
185 | bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) | |
186 | continue; | |
187 | } else { | |
188 | /* Don't send frame to other channel types */ | |
1da177e4 | 189 | continue; |
23500189 | 190 | } |
1da177e4 | 191 | |
e0edf373 MH |
192 | if (!skb_copy) { |
193 | /* Create a private copy with headroom */ | |
bad93e9d | 194 | skb_copy = __pskb_copy_fclone(skb, 1, GFP_ATOMIC, true); |
e0edf373 MH |
195 | if (!skb_copy) |
196 | continue; | |
197 | ||
198 | /* Put type byte before the data */ | |
199 | memcpy(skb_push(skb_copy, 1), &bt_cb(skb)->pkt_type, 1); | |
200 | } | |
201 | ||
202 | nskb = skb_clone(skb_copy, GFP_ATOMIC); | |
70f23020 | 203 | if (!nskb) |
1da177e4 LT |
204 | continue; |
205 | ||
470fe1b5 MH |
206 | if (sock_queue_rcv_skb(sk, nskb)) |
207 | kfree_skb(nskb); | |
208 | } | |
209 | ||
210 | read_unlock(&hci_sk_list.lock); | |
e0edf373 MH |
211 | |
212 | kfree_skb(skb_copy); | |
470fe1b5 MH |
213 | } |
214 | ||
7129069e JH |
215 | /* Send frame to sockets with specific channel */ |
216 | void hci_send_to_channel(unsigned short channel, struct sk_buff *skb, | |
c08b1a1d | 217 | int flag, struct sock *skip_sk) |
470fe1b5 MH |
218 | { |
219 | struct sock *sk; | |
470fe1b5 | 220 | |
7129069e | 221 | BT_DBG("channel %u len %d", channel, skb->len); |
470fe1b5 MH |
222 | |
223 | read_lock(&hci_sk_list.lock); | |
224 | ||
b67bfe0d | 225 | sk_for_each(sk, &hci_sk_list.head) { |
470fe1b5 MH |
226 | struct sk_buff *nskb; |
227 | ||
c08b1a1d | 228 | /* Ignore socket without the flag set */ |
c85be545 | 229 | if (!hci_sock_test_flag(sk, flag)) |
d7f72f61 MH |
230 | continue; |
231 | ||
c08b1a1d MH |
232 | /* Skip the original socket */ |
233 | if (sk == skip_sk) | |
17711c62 MH |
234 | continue; |
235 | ||
236 | if (sk->sk_state != BT_BOUND) | |
237 | continue; | |
238 | ||
239 | if (hci_pi(sk)->channel != channel) | |
240 | continue; | |
241 | ||
242 | nskb = skb_clone(skb, GFP_ATOMIC); | |
243 | if (!nskb) | |
244 | continue; | |
245 | ||
246 | if (sock_queue_rcv_skb(sk, nskb)) | |
247 | kfree_skb(nskb); | |
248 | } | |
249 | ||
250 | read_unlock(&hci_sk_list.lock); | |
251 | } | |
252 | ||
cd82e61c MH |
253 | /* Send frame to monitor socket */ |
254 | void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb) | |
255 | { | |
cd82e61c | 256 | struct sk_buff *skb_copy = NULL; |
2b531294 | 257 | struct hci_mon_hdr *hdr; |
cd82e61c MH |
258 | __le16 opcode; |
259 | ||
260 | if (!atomic_read(&monitor_promisc)) | |
261 | return; | |
262 | ||
263 | BT_DBG("hdev %p len %d", hdev, skb->len); | |
264 | ||
265 | switch (bt_cb(skb)->pkt_type) { | |
266 | case HCI_COMMAND_PKT: | |
dcf4adbf | 267 | opcode = cpu_to_le16(HCI_MON_COMMAND_PKT); |
cd82e61c MH |
268 | break; |
269 | case HCI_EVENT_PKT: | |
dcf4adbf | 270 | opcode = cpu_to_le16(HCI_MON_EVENT_PKT); |
cd82e61c MH |
271 | break; |
272 | case HCI_ACLDATA_PKT: | |
273 | if (bt_cb(skb)->incoming) | |
dcf4adbf | 274 | opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT); |
cd82e61c | 275 | else |
dcf4adbf | 276 | opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT); |
cd82e61c MH |
277 | break; |
278 | case HCI_SCODATA_PKT: | |
279 | if (bt_cb(skb)->incoming) | |
dcf4adbf | 280 | opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT); |
cd82e61c | 281 | else |
dcf4adbf | 282 | opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT); |
cd82e61c | 283 | break; |
e875ff84 MH |
284 | case HCI_DIAG_PKT: |
285 | opcode = cpu_to_le16(HCI_MON_VENDOR_DIAG); | |
286 | break; | |
cd82e61c MH |
287 | default: |
288 | return; | |
289 | } | |
290 | ||
2b531294 MH |
291 | /* Create a private copy with headroom */ |
292 | skb_copy = __pskb_copy_fclone(skb, HCI_MON_HDR_SIZE, GFP_ATOMIC, true); | |
293 | if (!skb_copy) | |
294 | return; | |
295 | ||
296 | /* Put header before the data */ | |
297 | hdr = (void *) skb_push(skb_copy, HCI_MON_HDR_SIZE); | |
298 | hdr->opcode = opcode; | |
299 | hdr->index = cpu_to_le16(hdev->id); | |
300 | hdr->len = cpu_to_le16(skb->len); | |
301 | ||
c08b1a1d MH |
302 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb_copy, |
303 | HCI_SOCK_TRUSTED, NULL); | |
cd82e61c MH |
304 | kfree_skb(skb_copy); |
305 | } | |
306 | ||
cd82e61c MH |
307 | static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event) |
308 | { | |
309 | struct hci_mon_hdr *hdr; | |
310 | struct hci_mon_new_index *ni; | |
6c566dd5 | 311 | struct hci_mon_index_info *ii; |
cd82e61c MH |
312 | struct sk_buff *skb; |
313 | __le16 opcode; | |
314 | ||
315 | switch (event) { | |
316 | case HCI_DEV_REG: | |
317 | skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC); | |
318 | if (!skb) | |
319 | return NULL; | |
320 | ||
6c566dd5 | 321 | ni = (void *)skb_put(skb, HCI_MON_NEW_INDEX_SIZE); |
cd82e61c MH |
322 | ni->type = hdev->dev_type; |
323 | ni->bus = hdev->bus; | |
324 | bacpy(&ni->bdaddr, &hdev->bdaddr); | |
325 | memcpy(ni->name, hdev->name, 8); | |
326 | ||
dcf4adbf | 327 | opcode = cpu_to_le16(HCI_MON_NEW_INDEX); |
cd82e61c MH |
328 | break; |
329 | ||
330 | case HCI_DEV_UNREG: | |
331 | skb = bt_skb_alloc(0, GFP_ATOMIC); | |
332 | if (!skb) | |
333 | return NULL; | |
334 | ||
dcf4adbf | 335 | opcode = cpu_to_le16(HCI_MON_DEL_INDEX); |
cd82e61c MH |
336 | break; |
337 | ||
e131d74a MH |
338 | case HCI_DEV_SETUP: |
339 | if (hdev->manufacturer == 0xffff) | |
340 | return NULL; | |
341 | ||
342 | /* fall through */ | |
343 | ||
6c566dd5 MH |
344 | case HCI_DEV_UP: |
345 | skb = bt_skb_alloc(HCI_MON_INDEX_INFO_SIZE, GFP_ATOMIC); | |
346 | if (!skb) | |
347 | return NULL; | |
348 | ||
349 | ii = (void *)skb_put(skb, HCI_MON_INDEX_INFO_SIZE); | |
350 | bacpy(&ii->bdaddr, &hdev->bdaddr); | |
351 | ii->manufacturer = cpu_to_le16(hdev->manufacturer); | |
352 | ||
353 | opcode = cpu_to_le16(HCI_MON_INDEX_INFO); | |
354 | break; | |
355 | ||
22db3cbc MH |
356 | case HCI_DEV_OPEN: |
357 | skb = bt_skb_alloc(0, GFP_ATOMIC); | |
358 | if (!skb) | |
359 | return NULL; | |
360 | ||
361 | opcode = cpu_to_le16(HCI_MON_OPEN_INDEX); | |
362 | break; | |
363 | ||
364 | case HCI_DEV_CLOSE: | |
365 | skb = bt_skb_alloc(0, GFP_ATOMIC); | |
366 | if (!skb) | |
367 | return NULL; | |
368 | ||
369 | opcode = cpu_to_le16(HCI_MON_CLOSE_INDEX); | |
370 | break; | |
371 | ||
cd82e61c MH |
372 | default: |
373 | return NULL; | |
374 | } | |
375 | ||
376 | __net_timestamp(skb); | |
377 | ||
378 | hdr = (void *) skb_push(skb, HCI_MON_HDR_SIZE); | |
379 | hdr->opcode = opcode; | |
380 | hdr->index = cpu_to_le16(hdev->id); | |
381 | hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); | |
382 | ||
383 | return skb; | |
384 | } | |
385 | ||
386 | static void send_monitor_replay(struct sock *sk) | |
387 | { | |
388 | struct hci_dev *hdev; | |
389 | ||
390 | read_lock(&hci_dev_list_lock); | |
391 | ||
392 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
393 | struct sk_buff *skb; | |
394 | ||
395 | skb = create_monitor_event(hdev, HCI_DEV_REG); | |
396 | if (!skb) | |
397 | continue; | |
398 | ||
399 | if (sock_queue_rcv_skb(sk, skb)) | |
400 | kfree_skb(skb); | |
22db3cbc MH |
401 | |
402 | if (!test_bit(HCI_RUNNING, &hdev->flags)) | |
403 | continue; | |
404 | ||
405 | skb = create_monitor_event(hdev, HCI_DEV_OPEN); | |
406 | if (!skb) | |
407 | continue; | |
408 | ||
409 | if (sock_queue_rcv_skb(sk, skb)) | |
410 | kfree_skb(skb); | |
6c566dd5 | 411 | |
e131d74a MH |
412 | if (test_bit(HCI_UP, &hdev->flags)) |
413 | skb = create_monitor_event(hdev, HCI_DEV_UP); | |
414 | else if (hci_dev_test_flag(hdev, HCI_SETUP)) | |
415 | skb = create_monitor_event(hdev, HCI_DEV_SETUP); | |
416 | else | |
417 | skb = NULL; | |
6c566dd5 | 418 | |
e131d74a MH |
419 | if (skb) { |
420 | if (sock_queue_rcv_skb(sk, skb)) | |
421 | kfree_skb(skb); | |
422 | } | |
cd82e61c MH |
423 | } |
424 | ||
425 | read_unlock(&hci_dev_list_lock); | |
426 | } | |
427 | ||
040030ef MH |
428 | /* Generate internal stack event */ |
429 | static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data) | |
430 | { | |
431 | struct hci_event_hdr *hdr; | |
432 | struct hci_ev_stack_internal *ev; | |
433 | struct sk_buff *skb; | |
434 | ||
435 | skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC); | |
436 | if (!skb) | |
437 | return; | |
438 | ||
439 | hdr = (void *) skb_put(skb, HCI_EVENT_HDR_SIZE); | |
440 | hdr->evt = HCI_EV_STACK_INTERNAL; | |
441 | hdr->plen = sizeof(*ev) + dlen; | |
442 | ||
443 | ev = (void *) skb_put(skb, sizeof(*ev) + dlen); | |
444 | ev->type = type; | |
445 | memcpy(ev->data, data, dlen); | |
446 | ||
447 | bt_cb(skb)->incoming = 1; | |
448 | __net_timestamp(skb); | |
449 | ||
450 | bt_cb(skb)->pkt_type = HCI_EVENT_PKT; | |
040030ef MH |
451 | hci_send_to_sock(hdev, skb); |
452 | kfree_skb(skb); | |
453 | } | |
454 | ||
455 | void hci_sock_dev_event(struct hci_dev *hdev, int event) | |
456 | { | |
040030ef MH |
457 | BT_DBG("hdev %s event %d", hdev->name, event); |
458 | ||
cd82e61c MH |
459 | if (atomic_read(&monitor_promisc)) { |
460 | struct sk_buff *skb; | |
461 | ||
ed1b28a4 | 462 | /* Send event to monitor */ |
cd82e61c MH |
463 | skb = create_monitor_event(hdev, event); |
464 | if (skb) { | |
c08b1a1d MH |
465 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, |
466 | HCI_SOCK_TRUSTED, NULL); | |
cd82e61c MH |
467 | kfree_skb(skb); |
468 | } | |
469 | } | |
470 | ||
ed1b28a4 MH |
471 | if (event <= HCI_DEV_DOWN) { |
472 | struct hci_ev_si_device ev; | |
473 | ||
474 | /* Send event to sockets */ | |
475 | ev.event = event; | |
476 | ev.dev_id = hdev->id; | |
477 | hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev); | |
478 | } | |
040030ef MH |
479 | |
480 | if (event == HCI_DEV_UNREG) { | |
481 | struct sock *sk; | |
040030ef MH |
482 | |
483 | /* Detach sockets from device */ | |
484 | read_lock(&hci_sk_list.lock); | |
b67bfe0d | 485 | sk_for_each(sk, &hci_sk_list.head) { |
040030ef MH |
486 | bh_lock_sock_nested(sk); |
487 | if (hci_pi(sk)->hdev == hdev) { | |
488 | hci_pi(sk)->hdev = NULL; | |
489 | sk->sk_err = EPIPE; | |
490 | sk->sk_state = BT_OPEN; | |
491 | sk->sk_state_change(sk); | |
492 | ||
493 | hci_dev_put(hdev); | |
494 | } | |
495 | bh_unlock_sock(sk); | |
496 | } | |
497 | read_unlock(&hci_sk_list.lock); | |
498 | } | |
499 | } | |
500 | ||
801c1e8d JH |
501 | static struct hci_mgmt_chan *__hci_mgmt_chan_find(unsigned short channel) |
502 | { | |
503 | struct hci_mgmt_chan *c; | |
504 | ||
505 | list_for_each_entry(c, &mgmt_chan_list, list) { | |
506 | if (c->channel == channel) | |
507 | return c; | |
508 | } | |
509 | ||
510 | return NULL; | |
511 | } | |
512 | ||
513 | static struct hci_mgmt_chan *hci_mgmt_chan_find(unsigned short channel) | |
514 | { | |
515 | struct hci_mgmt_chan *c; | |
516 | ||
517 | mutex_lock(&mgmt_chan_list_lock); | |
518 | c = __hci_mgmt_chan_find(channel); | |
519 | mutex_unlock(&mgmt_chan_list_lock); | |
520 | ||
521 | return c; | |
522 | } | |
523 | ||
524 | int hci_mgmt_chan_register(struct hci_mgmt_chan *c) | |
525 | { | |
526 | if (c->channel < HCI_CHANNEL_CONTROL) | |
527 | return -EINVAL; | |
528 | ||
529 | mutex_lock(&mgmt_chan_list_lock); | |
530 | if (__hci_mgmt_chan_find(c->channel)) { | |
531 | mutex_unlock(&mgmt_chan_list_lock); | |
532 | return -EALREADY; | |
533 | } | |
534 | ||
535 | list_add_tail(&c->list, &mgmt_chan_list); | |
536 | ||
537 | mutex_unlock(&mgmt_chan_list_lock); | |
538 | ||
539 | return 0; | |
540 | } | |
541 | EXPORT_SYMBOL(hci_mgmt_chan_register); | |
542 | ||
543 | void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c) | |
544 | { | |
545 | mutex_lock(&mgmt_chan_list_lock); | |
546 | list_del(&c->list); | |
547 | mutex_unlock(&mgmt_chan_list_lock); | |
548 | } | |
549 | EXPORT_SYMBOL(hci_mgmt_chan_unregister); | |
550 | ||
1da177e4 LT |
551 | static int hci_sock_release(struct socket *sock) |
552 | { | |
553 | struct sock *sk = sock->sk; | |
7b005bd3 | 554 | struct hci_dev *hdev; |
1da177e4 LT |
555 | |
556 | BT_DBG("sock %p sk %p", sock, sk); | |
557 | ||
558 | if (!sk) | |
559 | return 0; | |
560 | ||
7b005bd3 MH |
561 | hdev = hci_pi(sk)->hdev; |
562 | ||
cd82e61c MH |
563 | if (hci_pi(sk)->channel == HCI_CHANNEL_MONITOR) |
564 | atomic_dec(&monitor_promisc); | |
565 | ||
1da177e4 LT |
566 | bt_sock_unlink(&hci_sk_list, sk); |
567 | ||
568 | if (hdev) { | |
23500189 | 569 | if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { |
6b3cc1db SF |
570 | /* When releasing an user channel exclusive access, |
571 | * call hci_dev_do_close directly instead of calling | |
572 | * hci_dev_close to ensure the exclusive access will | |
573 | * be released and the controller brought back down. | |
574 | * | |
575 | * The checking of HCI_AUTO_OFF is not needed in this | |
576 | * case since it will have been cleared already when | |
577 | * opening the user channel. | |
578 | */ | |
579 | hci_dev_do_close(hdev); | |
9380f9ea LP |
580 | hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); |
581 | mgmt_index_added(hdev); | |
23500189 MH |
582 | } |
583 | ||
1da177e4 LT |
584 | atomic_dec(&hdev->promisc); |
585 | hci_dev_put(hdev); | |
586 | } | |
587 | ||
588 | sock_orphan(sk); | |
589 | ||
590 | skb_queue_purge(&sk->sk_receive_queue); | |
591 | skb_queue_purge(&sk->sk_write_queue); | |
592 | ||
593 | sock_put(sk); | |
594 | return 0; | |
595 | } | |
596 | ||
b2a66aad | 597 | static int hci_sock_blacklist_add(struct hci_dev *hdev, void __user *arg) |
f0358568 JH |
598 | { |
599 | bdaddr_t bdaddr; | |
5e762444 | 600 | int err; |
f0358568 JH |
601 | |
602 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
603 | return -EFAULT; | |
604 | ||
09fd0de5 | 605 | hci_dev_lock(hdev); |
5e762444 | 606 | |
dcc36c16 | 607 | err = hci_bdaddr_list_add(&hdev->blacklist, &bdaddr, BDADDR_BREDR); |
5e762444 | 608 | |
09fd0de5 | 609 | hci_dev_unlock(hdev); |
5e762444 AJ |
610 | |
611 | return err; | |
f0358568 JH |
612 | } |
613 | ||
b2a66aad | 614 | static int hci_sock_blacklist_del(struct hci_dev *hdev, void __user *arg) |
f0358568 JH |
615 | { |
616 | bdaddr_t bdaddr; | |
5e762444 | 617 | int err; |
f0358568 JH |
618 | |
619 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
620 | return -EFAULT; | |
621 | ||
09fd0de5 | 622 | hci_dev_lock(hdev); |
5e762444 | 623 | |
dcc36c16 | 624 | err = hci_bdaddr_list_del(&hdev->blacklist, &bdaddr, BDADDR_BREDR); |
5e762444 | 625 | |
09fd0de5 | 626 | hci_dev_unlock(hdev); |
5e762444 AJ |
627 | |
628 | return err; | |
f0358568 JH |
629 | } |
630 | ||
8e87d142 | 631 | /* Ioctls that require bound socket */ |
6039aa73 GP |
632 | static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, |
633 | unsigned long arg) | |
1da177e4 LT |
634 | { |
635 | struct hci_dev *hdev = hci_pi(sk)->hdev; | |
636 | ||
637 | if (!hdev) | |
638 | return -EBADFD; | |
639 | ||
d7a5a11d | 640 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) |
0736cfa8 MH |
641 | return -EBUSY; |
642 | ||
d7a5a11d | 643 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) |
fee746b0 MH |
644 | return -EOPNOTSUPP; |
645 | ||
5b69bef5 MH |
646 | if (hdev->dev_type != HCI_BREDR) |
647 | return -EOPNOTSUPP; | |
648 | ||
1da177e4 LT |
649 | switch (cmd) { |
650 | case HCISETRAW: | |
651 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 652 | return -EPERM; |
db596681 | 653 | return -EOPNOTSUPP; |
1da177e4 | 654 | |
1da177e4 | 655 | case HCIGETCONNINFO: |
40be492f MH |
656 | return hci_get_conn_info(hdev, (void __user *) arg); |
657 | ||
658 | case HCIGETAUTHINFO: | |
659 | return hci_get_auth_info(hdev, (void __user *) arg); | |
1da177e4 | 660 | |
f0358568 JH |
661 | case HCIBLOCKADDR: |
662 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 663 | return -EPERM; |
b2a66aad | 664 | return hci_sock_blacklist_add(hdev, (void __user *) arg); |
f0358568 JH |
665 | |
666 | case HCIUNBLOCKADDR: | |
667 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 668 | return -EPERM; |
b2a66aad | 669 | return hci_sock_blacklist_del(hdev, (void __user *) arg); |
1da177e4 | 670 | } |
0736cfa8 | 671 | |
324d36ed | 672 | return -ENOIOCTLCMD; |
1da177e4 LT |
673 | } |
674 | ||
8fc9ced3 GP |
675 | static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, |
676 | unsigned long arg) | |
1da177e4 | 677 | { |
40be492f | 678 | void __user *argp = (void __user *) arg; |
0736cfa8 | 679 | struct sock *sk = sock->sk; |
1da177e4 LT |
680 | int err; |
681 | ||
682 | BT_DBG("cmd %x arg %lx", cmd, arg); | |
683 | ||
c1c4f956 MH |
684 | lock_sock(sk); |
685 | ||
686 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { | |
687 | err = -EBADFD; | |
688 | goto done; | |
689 | } | |
690 | ||
691 | release_sock(sk); | |
692 | ||
1da177e4 LT |
693 | switch (cmd) { |
694 | case HCIGETDEVLIST: | |
695 | return hci_get_dev_list(argp); | |
696 | ||
697 | case HCIGETDEVINFO: | |
698 | return hci_get_dev_info(argp); | |
699 | ||
700 | case HCIGETCONNLIST: | |
701 | return hci_get_conn_list(argp); | |
702 | ||
703 | case HCIDEVUP: | |
704 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 705 | return -EPERM; |
1da177e4 LT |
706 | return hci_dev_open(arg); |
707 | ||
708 | case HCIDEVDOWN: | |
709 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 710 | return -EPERM; |
1da177e4 LT |
711 | return hci_dev_close(arg); |
712 | ||
713 | case HCIDEVRESET: | |
714 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 715 | return -EPERM; |
1da177e4 LT |
716 | return hci_dev_reset(arg); |
717 | ||
718 | case HCIDEVRESTAT: | |
719 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 720 | return -EPERM; |
1da177e4 LT |
721 | return hci_dev_reset_stat(arg); |
722 | ||
723 | case HCISETSCAN: | |
724 | case HCISETAUTH: | |
725 | case HCISETENCRYPT: | |
726 | case HCISETPTYPE: | |
727 | case HCISETLINKPOL: | |
728 | case HCISETLINKMODE: | |
729 | case HCISETACLMTU: | |
730 | case HCISETSCOMTU: | |
731 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 732 | return -EPERM; |
1da177e4 LT |
733 | return hci_dev_cmd(cmd, argp); |
734 | ||
735 | case HCIINQUIRY: | |
736 | return hci_inquiry(argp); | |
1da177e4 | 737 | } |
c1c4f956 MH |
738 | |
739 | lock_sock(sk); | |
740 | ||
741 | err = hci_sock_bound_ioctl(sk, cmd, arg); | |
742 | ||
743 | done: | |
744 | release_sock(sk); | |
745 | return err; | |
1da177e4 LT |
746 | } |
747 | ||
8fc9ced3 GP |
748 | static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, |
749 | int addr_len) | |
1da177e4 | 750 | { |
0381101f | 751 | struct sockaddr_hci haddr; |
1da177e4 LT |
752 | struct sock *sk = sock->sk; |
753 | struct hci_dev *hdev = NULL; | |
0381101f | 754 | int len, err = 0; |
1da177e4 LT |
755 | |
756 | BT_DBG("sock %p sk %p", sock, sk); | |
757 | ||
0381101f JH |
758 | if (!addr) |
759 | return -EINVAL; | |
760 | ||
761 | memset(&haddr, 0, sizeof(haddr)); | |
762 | len = min_t(unsigned int, sizeof(haddr), addr_len); | |
763 | memcpy(&haddr, addr, len); | |
764 | ||
765 | if (haddr.hci_family != AF_BLUETOOTH) | |
766 | return -EINVAL; | |
767 | ||
1da177e4 LT |
768 | lock_sock(sk); |
769 | ||
7cc2ade2 | 770 | if (sk->sk_state == BT_BOUND) { |
1da177e4 LT |
771 | err = -EALREADY; |
772 | goto done; | |
773 | } | |
774 | ||
7cc2ade2 MH |
775 | switch (haddr.hci_channel) { |
776 | case HCI_CHANNEL_RAW: | |
777 | if (hci_pi(sk)->hdev) { | |
778 | err = -EALREADY; | |
1da177e4 LT |
779 | goto done; |
780 | } | |
781 | ||
7cc2ade2 MH |
782 | if (haddr.hci_dev != HCI_DEV_NONE) { |
783 | hdev = hci_dev_get(haddr.hci_dev); | |
784 | if (!hdev) { | |
785 | err = -ENODEV; | |
786 | goto done; | |
787 | } | |
788 | ||
789 | atomic_inc(&hdev->promisc); | |
790 | } | |
791 | ||
792 | hci_pi(sk)->hdev = hdev; | |
793 | break; | |
794 | ||
23500189 MH |
795 | case HCI_CHANNEL_USER: |
796 | if (hci_pi(sk)->hdev) { | |
797 | err = -EALREADY; | |
798 | goto done; | |
799 | } | |
800 | ||
801 | if (haddr.hci_dev == HCI_DEV_NONE) { | |
802 | err = -EINVAL; | |
803 | goto done; | |
804 | } | |
805 | ||
10a8b86f | 806 | if (!capable(CAP_NET_ADMIN)) { |
23500189 MH |
807 | err = -EPERM; |
808 | goto done; | |
809 | } | |
810 | ||
811 | hdev = hci_dev_get(haddr.hci_dev); | |
812 | if (!hdev) { | |
813 | err = -ENODEV; | |
814 | goto done; | |
815 | } | |
816 | ||
781f899f | 817 | if (test_bit(HCI_INIT, &hdev->flags) || |
d7a5a11d | 818 | hci_dev_test_flag(hdev, HCI_SETUP) || |
781f899f MH |
819 | hci_dev_test_flag(hdev, HCI_CONFIG) || |
820 | (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) && | |
821 | test_bit(HCI_UP, &hdev->flags))) { | |
23500189 MH |
822 | err = -EBUSY; |
823 | hci_dev_put(hdev); | |
824 | goto done; | |
825 | } | |
826 | ||
238be788 | 827 | if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) { |
23500189 MH |
828 | err = -EUSERS; |
829 | hci_dev_put(hdev); | |
830 | goto done; | |
831 | } | |
832 | ||
0602a8ad | 833 | mgmt_index_removed(hdev); |
23500189 MH |
834 | |
835 | err = hci_dev_open(hdev->id); | |
836 | if (err) { | |
781f899f MH |
837 | if (err == -EALREADY) { |
838 | /* In case the transport is already up and | |
839 | * running, clear the error here. | |
840 | * | |
841 | * This can happen when opening an user | |
842 | * channel and HCI_AUTO_OFF grace period | |
843 | * is still active. | |
844 | */ | |
845 | err = 0; | |
846 | } else { | |
847 | hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); | |
848 | mgmt_index_added(hdev); | |
849 | hci_dev_put(hdev); | |
850 | goto done; | |
851 | } | |
23500189 MH |
852 | } |
853 | ||
854 | atomic_inc(&hdev->promisc); | |
855 | ||
856 | hci_pi(sk)->hdev = hdev; | |
857 | break; | |
858 | ||
cd82e61c MH |
859 | case HCI_CHANNEL_MONITOR: |
860 | if (haddr.hci_dev != HCI_DEV_NONE) { | |
861 | err = -EINVAL; | |
862 | goto done; | |
863 | } | |
864 | ||
865 | if (!capable(CAP_NET_RAW)) { | |
866 | err = -EPERM; | |
867 | goto done; | |
868 | } | |
869 | ||
50ebc055 MH |
870 | /* The monitor interface is restricted to CAP_NET_RAW |
871 | * capabilities and with that implicitly trusted. | |
872 | */ | |
873 | hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); | |
874 | ||
cd82e61c MH |
875 | send_monitor_replay(sk); |
876 | ||
877 | atomic_inc(&monitor_promisc); | |
878 | break; | |
879 | ||
7cc2ade2 | 880 | default: |
801c1e8d JH |
881 | if (!hci_mgmt_chan_find(haddr.hci_channel)) { |
882 | err = -EINVAL; | |
883 | goto done; | |
884 | } | |
885 | ||
886 | if (haddr.hci_dev != HCI_DEV_NONE) { | |
887 | err = -EINVAL; | |
888 | goto done; | |
889 | } | |
890 | ||
1195fbb8 MH |
891 | /* Users with CAP_NET_ADMIN capabilities are allowed |
892 | * access to all management commands and events. For | |
893 | * untrusted users the interface is restricted and | |
894 | * also only untrusted events are sent. | |
50ebc055 | 895 | */ |
1195fbb8 MH |
896 | if (capable(CAP_NET_ADMIN)) |
897 | hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); | |
50ebc055 | 898 | |
f9207338 MH |
899 | /* At the moment the index and unconfigured index events |
900 | * are enabled unconditionally. Setting them on each | |
901 | * socket when binding keeps this functionality. They | |
902 | * however might be cleared later and then sending of these | |
903 | * events will be disabled, but that is then intentional. | |
f6b7712e MH |
904 | * |
905 | * This also enables generic events that are safe to be | |
906 | * received by untrusted users. Example for such events | |
907 | * are changes to settings, class of device, name etc. | |
f9207338 MH |
908 | */ |
909 | if (haddr.hci_channel == HCI_CHANNEL_CONTROL) { | |
910 | hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS); | |
911 | hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS); | |
f6b7712e | 912 | hci_sock_set_flag(sk, HCI_MGMT_GENERIC_EVENTS); |
f9207338 | 913 | } |
801c1e8d | 914 | break; |
1da177e4 LT |
915 | } |
916 | ||
7cc2ade2 | 917 | |
0381101f | 918 | hci_pi(sk)->channel = haddr.hci_channel; |
1da177e4 LT |
919 | sk->sk_state = BT_BOUND; |
920 | ||
921 | done: | |
922 | release_sock(sk); | |
923 | return err; | |
924 | } | |
925 | ||
8fc9ced3 GP |
926 | static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, |
927 | int *addr_len, int peer) | |
1da177e4 LT |
928 | { |
929 | struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr; | |
930 | struct sock *sk = sock->sk; | |
9d4b68b2 MH |
931 | struct hci_dev *hdev; |
932 | int err = 0; | |
1da177e4 LT |
933 | |
934 | BT_DBG("sock %p sk %p", sock, sk); | |
935 | ||
06f43cbc MH |
936 | if (peer) |
937 | return -EOPNOTSUPP; | |
938 | ||
1da177e4 LT |
939 | lock_sock(sk); |
940 | ||
9d4b68b2 MH |
941 | hdev = hci_pi(sk)->hdev; |
942 | if (!hdev) { | |
943 | err = -EBADFD; | |
944 | goto done; | |
945 | } | |
946 | ||
1da177e4 LT |
947 | *addr_len = sizeof(*haddr); |
948 | haddr->hci_family = AF_BLUETOOTH; | |
7b005bd3 | 949 | haddr->hci_dev = hdev->id; |
9d4b68b2 | 950 | haddr->hci_channel= hci_pi(sk)->channel; |
1da177e4 | 951 | |
9d4b68b2 | 952 | done: |
1da177e4 | 953 | release_sock(sk); |
9d4b68b2 | 954 | return err; |
1da177e4 LT |
955 | } |
956 | ||
6039aa73 GP |
957 | static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, |
958 | struct sk_buff *skb) | |
1da177e4 LT |
959 | { |
960 | __u32 mask = hci_pi(sk)->cmsg_mask; | |
961 | ||
0d48d939 MH |
962 | if (mask & HCI_CMSG_DIR) { |
963 | int incoming = bt_cb(skb)->incoming; | |
8fc9ced3 GP |
964 | put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), |
965 | &incoming); | |
0d48d939 | 966 | } |
1da177e4 | 967 | |
a61bbcf2 | 968 | if (mask & HCI_CMSG_TSTAMP) { |
f6e623a6 JFS |
969 | #ifdef CONFIG_COMPAT |
970 | struct compat_timeval ctv; | |
971 | #endif | |
a61bbcf2 | 972 | struct timeval tv; |
767c5eb5 MH |
973 | void *data; |
974 | int len; | |
a61bbcf2 PM |
975 | |
976 | skb_get_timestamp(skb, &tv); | |
767c5eb5 | 977 | |
1da97f83 DM |
978 | data = &tv; |
979 | len = sizeof(tv); | |
980 | #ifdef CONFIG_COMPAT | |
da88cea1 L |
981 | if (!COMPAT_USE_64BIT_TIME && |
982 | (msg->msg_flags & MSG_CMSG_COMPAT)) { | |
767c5eb5 MH |
983 | ctv.tv_sec = tv.tv_sec; |
984 | ctv.tv_usec = tv.tv_usec; | |
985 | data = &ctv; | |
986 | len = sizeof(ctv); | |
767c5eb5 | 987 | } |
1da97f83 | 988 | #endif |
767c5eb5 MH |
989 | |
990 | put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data); | |
a61bbcf2 | 991 | } |
1da177e4 | 992 | } |
8e87d142 | 993 | |
1b784140 YX |
994 | static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
995 | int flags) | |
1da177e4 LT |
996 | { |
997 | int noblock = flags & MSG_DONTWAIT; | |
998 | struct sock *sk = sock->sk; | |
999 | struct sk_buff *skb; | |
1000 | int copied, err; | |
1001 | ||
1002 | BT_DBG("sock %p, sk %p", sock, sk); | |
1003 | ||
d94a6104 | 1004 | if (flags & MSG_OOB) |
1da177e4 LT |
1005 | return -EOPNOTSUPP; |
1006 | ||
1007 | if (sk->sk_state == BT_CLOSED) | |
1008 | return 0; | |
1009 | ||
70f23020 AE |
1010 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
1011 | if (!skb) | |
1da177e4 LT |
1012 | return err; |
1013 | ||
1da177e4 LT |
1014 | copied = skb->len; |
1015 | if (len < copied) { | |
1016 | msg->msg_flags |= MSG_TRUNC; | |
1017 | copied = len; | |
1018 | } | |
1019 | ||
badff6d0 | 1020 | skb_reset_transport_header(skb); |
51f3d02b | 1021 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 | 1022 | |
3a208627 MH |
1023 | switch (hci_pi(sk)->channel) { |
1024 | case HCI_CHANNEL_RAW: | |
1025 | hci_sock_cmsg(sk, msg, skb); | |
1026 | break; | |
23500189 | 1027 | case HCI_CHANNEL_USER: |
cd82e61c MH |
1028 | case HCI_CHANNEL_MONITOR: |
1029 | sock_recv_timestamp(msg, sk, skb); | |
1030 | break; | |
801c1e8d JH |
1031 | default: |
1032 | if (hci_mgmt_chan_find(hci_pi(sk)->channel)) | |
1033 | sock_recv_timestamp(msg, sk, skb); | |
1034 | break; | |
3a208627 | 1035 | } |
1da177e4 LT |
1036 | |
1037 | skb_free_datagram(sk, skb); | |
1038 | ||
1039 | return err ? : copied; | |
1040 | } | |
1041 | ||
fa4335d7 JH |
1042 | static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk, |
1043 | struct msghdr *msg, size_t msglen) | |
1044 | { | |
1045 | void *buf; | |
1046 | u8 *cp; | |
1047 | struct mgmt_hdr *hdr; | |
1048 | u16 opcode, index, len; | |
1049 | struct hci_dev *hdev = NULL; | |
1050 | const struct hci_mgmt_handler *handler; | |
1051 | bool var_len, no_hdev; | |
1052 | int err; | |
1053 | ||
1054 | BT_DBG("got %zu bytes", msglen); | |
1055 | ||
1056 | if (msglen < sizeof(*hdr)) | |
1057 | return -EINVAL; | |
1058 | ||
1059 | buf = kmalloc(msglen, GFP_KERNEL); | |
1060 | if (!buf) | |
1061 | return -ENOMEM; | |
1062 | ||
1063 | if (memcpy_from_msg(buf, msg, msglen)) { | |
1064 | err = -EFAULT; | |
1065 | goto done; | |
1066 | } | |
1067 | ||
1068 | hdr = buf; | |
1069 | opcode = __le16_to_cpu(hdr->opcode); | |
1070 | index = __le16_to_cpu(hdr->index); | |
1071 | len = __le16_to_cpu(hdr->len); | |
1072 | ||
1073 | if (len != msglen - sizeof(*hdr)) { | |
1074 | err = -EINVAL; | |
1075 | goto done; | |
1076 | } | |
1077 | ||
1078 | if (opcode >= chan->handler_count || | |
1079 | chan->handlers[opcode].func == NULL) { | |
1080 | BT_DBG("Unknown op %u", opcode); | |
1081 | err = mgmt_cmd_status(sk, index, opcode, | |
1082 | MGMT_STATUS_UNKNOWN_COMMAND); | |
1083 | goto done; | |
1084 | } | |
1085 | ||
1086 | handler = &chan->handlers[opcode]; | |
1087 | ||
1088 | if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) && | |
1089 | !(handler->flags & HCI_MGMT_UNTRUSTED)) { | |
1090 | err = mgmt_cmd_status(sk, index, opcode, | |
1091 | MGMT_STATUS_PERMISSION_DENIED); | |
1092 | goto done; | |
1093 | } | |
1094 | ||
1095 | if (index != MGMT_INDEX_NONE) { | |
1096 | hdev = hci_dev_get(index); | |
1097 | if (!hdev) { | |
1098 | err = mgmt_cmd_status(sk, index, opcode, | |
1099 | MGMT_STATUS_INVALID_INDEX); | |
1100 | goto done; | |
1101 | } | |
1102 | ||
1103 | if (hci_dev_test_flag(hdev, HCI_SETUP) || | |
1104 | hci_dev_test_flag(hdev, HCI_CONFIG) || | |
1105 | hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { | |
1106 | err = mgmt_cmd_status(sk, index, opcode, | |
1107 | MGMT_STATUS_INVALID_INDEX); | |
1108 | goto done; | |
1109 | } | |
1110 | ||
1111 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) && | |
1112 | !(handler->flags & HCI_MGMT_UNCONFIGURED)) { | |
1113 | err = mgmt_cmd_status(sk, index, opcode, | |
1114 | MGMT_STATUS_INVALID_INDEX); | |
1115 | goto done; | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | no_hdev = (handler->flags & HCI_MGMT_NO_HDEV); | |
1120 | if (no_hdev != !hdev) { | |
1121 | err = mgmt_cmd_status(sk, index, opcode, | |
1122 | MGMT_STATUS_INVALID_INDEX); | |
1123 | goto done; | |
1124 | } | |
1125 | ||
1126 | var_len = (handler->flags & HCI_MGMT_VAR_LEN); | |
1127 | if ((var_len && len < handler->data_len) || | |
1128 | (!var_len && len != handler->data_len)) { | |
1129 | err = mgmt_cmd_status(sk, index, opcode, | |
1130 | MGMT_STATUS_INVALID_PARAMS); | |
1131 | goto done; | |
1132 | } | |
1133 | ||
1134 | if (hdev && chan->hdev_init) | |
1135 | chan->hdev_init(sk, hdev); | |
1136 | ||
1137 | cp = buf + sizeof(*hdr); | |
1138 | ||
1139 | err = handler->func(sk, hdev, cp, len); | |
1140 | if (err < 0) | |
1141 | goto done; | |
1142 | ||
1143 | err = msglen; | |
1144 | ||
1145 | done: | |
1146 | if (hdev) | |
1147 | hci_dev_put(hdev); | |
1148 | ||
1149 | kfree(buf); | |
1150 | return err; | |
1151 | } | |
1152 | ||
1b784140 YX |
1153 | static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
1154 | size_t len) | |
1da177e4 LT |
1155 | { |
1156 | struct sock *sk = sock->sk; | |
801c1e8d | 1157 | struct hci_mgmt_chan *chan; |
1da177e4 LT |
1158 | struct hci_dev *hdev; |
1159 | struct sk_buff *skb; | |
1160 | int err; | |
1161 | ||
1162 | BT_DBG("sock %p sk %p", sock, sk); | |
1163 | ||
1164 | if (msg->msg_flags & MSG_OOB) | |
1165 | return -EOPNOTSUPP; | |
1166 | ||
1167 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE)) | |
1168 | return -EINVAL; | |
1169 | ||
1170 | if (len < 4 || len > HCI_MAX_FRAME_SIZE) | |
1171 | return -EINVAL; | |
1172 | ||
1173 | lock_sock(sk); | |
1174 | ||
0381101f JH |
1175 | switch (hci_pi(sk)->channel) { |
1176 | case HCI_CHANNEL_RAW: | |
23500189 | 1177 | case HCI_CHANNEL_USER: |
0381101f | 1178 | break; |
cd82e61c MH |
1179 | case HCI_CHANNEL_MONITOR: |
1180 | err = -EOPNOTSUPP; | |
1181 | goto done; | |
0381101f | 1182 | default: |
801c1e8d JH |
1183 | mutex_lock(&mgmt_chan_list_lock); |
1184 | chan = __hci_mgmt_chan_find(hci_pi(sk)->channel); | |
1185 | if (chan) | |
fa4335d7 | 1186 | err = hci_mgmt_cmd(chan, sk, msg, len); |
801c1e8d JH |
1187 | else |
1188 | err = -EINVAL; | |
1189 | ||
1190 | mutex_unlock(&mgmt_chan_list_lock); | |
0381101f JH |
1191 | goto done; |
1192 | } | |
1193 | ||
70f23020 AE |
1194 | hdev = hci_pi(sk)->hdev; |
1195 | if (!hdev) { | |
1da177e4 LT |
1196 | err = -EBADFD; |
1197 | goto done; | |
1198 | } | |
1199 | ||
7e21addc MH |
1200 | if (!test_bit(HCI_UP, &hdev->flags)) { |
1201 | err = -ENETDOWN; | |
1202 | goto done; | |
1203 | } | |
1204 | ||
70f23020 AE |
1205 | skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err); |
1206 | if (!skb) | |
1da177e4 LT |
1207 | goto done; |
1208 | ||
6ce8e9ce | 1209 | if (memcpy_from_msg(skb_put(skb, len), msg, len)) { |
1da177e4 LT |
1210 | err = -EFAULT; |
1211 | goto drop; | |
1212 | } | |
1213 | ||
0d48d939 | 1214 | bt_cb(skb)->pkt_type = *((unsigned char *) skb->data); |
1da177e4 | 1215 | skb_pull(skb, 1); |
1da177e4 | 1216 | |
1bc5ad16 MH |
1217 | if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { |
1218 | /* No permission check is needed for user channel | |
1219 | * since that gets enforced when binding the socket. | |
1220 | * | |
1221 | * However check that the packet type is valid. | |
1222 | */ | |
1223 | if (bt_cb(skb)->pkt_type != HCI_COMMAND_PKT && | |
1224 | bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT && | |
1225 | bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) { | |
1226 | err = -EINVAL; | |
1227 | goto drop; | |
1228 | } | |
1229 | ||
1230 | skb_queue_tail(&hdev->raw_q, skb); | |
1231 | queue_work(hdev->workqueue, &hdev->tx_work); | |
1232 | } else if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) { | |
83985319 | 1233 | u16 opcode = get_unaligned_le16(skb->data); |
1da177e4 LT |
1234 | u16 ogf = hci_opcode_ogf(opcode); |
1235 | u16 ocf = hci_opcode_ocf(opcode); | |
1236 | ||
1237 | if (((ogf > HCI_SFLT_MAX_OGF) || | |
3bb3c755 GP |
1238 | !hci_test_bit(ocf & HCI_FLT_OCF_BITS, |
1239 | &hci_sec_filter.ocf_mask[ogf])) && | |
1240 | !capable(CAP_NET_RAW)) { | |
1da177e4 LT |
1241 | err = -EPERM; |
1242 | goto drop; | |
1243 | } | |
1244 | ||
fee746b0 | 1245 | if (ogf == 0x3f) { |
1da177e4 | 1246 | skb_queue_tail(&hdev->raw_q, skb); |
3eff45ea | 1247 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 | 1248 | } else { |
49c922bb | 1249 | /* Stand-alone HCI commands must be flagged as |
11714b3d JH |
1250 | * single-command requests. |
1251 | */ | |
242c0ebd | 1252 | bt_cb(skb)->hci.req_start = true; |
11714b3d | 1253 | |
1da177e4 | 1254 | skb_queue_tail(&hdev->cmd_q, skb); |
c347b765 | 1255 | queue_work(hdev->workqueue, &hdev->cmd_work); |
1da177e4 LT |
1256 | } |
1257 | } else { | |
1258 | if (!capable(CAP_NET_RAW)) { | |
1259 | err = -EPERM; | |
1260 | goto drop; | |
1261 | } | |
1262 | ||
bb77543e MH |
1263 | if (bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT && |
1264 | bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) { | |
1265 | err = -EINVAL; | |
1266 | goto drop; | |
1267 | } | |
1268 | ||
1da177e4 | 1269 | skb_queue_tail(&hdev->raw_q, skb); |
3eff45ea | 1270 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 LT |
1271 | } |
1272 | ||
1273 | err = len; | |
1274 | ||
1275 | done: | |
1276 | release_sock(sk); | |
1277 | return err; | |
1278 | ||
1279 | drop: | |
1280 | kfree_skb(skb); | |
1281 | goto done; | |
1282 | } | |
1283 | ||
8fc9ced3 GP |
1284 | static int hci_sock_setsockopt(struct socket *sock, int level, int optname, |
1285 | char __user *optval, unsigned int len) | |
1da177e4 LT |
1286 | { |
1287 | struct hci_ufilter uf = { .opcode = 0 }; | |
1288 | struct sock *sk = sock->sk; | |
1289 | int err = 0, opt = 0; | |
1290 | ||
1291 | BT_DBG("sk %p, opt %d", sk, optname); | |
1292 | ||
1293 | lock_sock(sk); | |
1294 | ||
2f39cdb7 | 1295 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { |
c2371e80 | 1296 | err = -EBADFD; |
2f39cdb7 MH |
1297 | goto done; |
1298 | } | |
1299 | ||
1da177e4 LT |
1300 | switch (optname) { |
1301 | case HCI_DATA_DIR: | |
1302 | if (get_user(opt, (int __user *)optval)) { | |
1303 | err = -EFAULT; | |
1304 | break; | |
1305 | } | |
1306 | ||
1307 | if (opt) | |
1308 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR; | |
1309 | else | |
1310 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR; | |
1311 | break; | |
1312 | ||
1313 | case HCI_TIME_STAMP: | |
1314 | if (get_user(opt, (int __user *)optval)) { | |
1315 | err = -EFAULT; | |
1316 | break; | |
1317 | } | |
1318 | ||
1319 | if (opt) | |
1320 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP; | |
1321 | else | |
1322 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP; | |
1323 | break; | |
1324 | ||
1325 | case HCI_FILTER: | |
0878b666 MH |
1326 | { |
1327 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1328 | ||
1329 | uf.type_mask = f->type_mask; | |
1330 | uf.opcode = f->opcode; | |
1331 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
1332 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
1333 | } | |
1334 | ||
1da177e4 LT |
1335 | len = min_t(unsigned int, len, sizeof(uf)); |
1336 | if (copy_from_user(&uf, optval, len)) { | |
1337 | err = -EFAULT; | |
1338 | break; | |
1339 | } | |
1340 | ||
1341 | if (!capable(CAP_NET_RAW)) { | |
1342 | uf.type_mask &= hci_sec_filter.type_mask; | |
1343 | uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0); | |
1344 | uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1); | |
1345 | } | |
1346 | ||
1347 | { | |
1348 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1349 | ||
1350 | f->type_mask = uf.type_mask; | |
1351 | f->opcode = uf.opcode; | |
1352 | *((u32 *) f->event_mask + 0) = uf.event_mask[0]; | |
1353 | *((u32 *) f->event_mask + 1) = uf.event_mask[1]; | |
1354 | } | |
8e87d142 | 1355 | break; |
1da177e4 LT |
1356 | |
1357 | default: | |
1358 | err = -ENOPROTOOPT; | |
1359 | break; | |
1360 | } | |
1361 | ||
2f39cdb7 | 1362 | done: |
1da177e4 LT |
1363 | release_sock(sk); |
1364 | return err; | |
1365 | } | |
1366 | ||
8fc9ced3 GP |
1367 | static int hci_sock_getsockopt(struct socket *sock, int level, int optname, |
1368 | char __user *optval, int __user *optlen) | |
1da177e4 LT |
1369 | { |
1370 | struct hci_ufilter uf; | |
1371 | struct sock *sk = sock->sk; | |
cedc5469 MH |
1372 | int len, opt, err = 0; |
1373 | ||
1374 | BT_DBG("sk %p, opt %d", sk, optname); | |
1da177e4 LT |
1375 | |
1376 | if (get_user(len, optlen)) | |
1377 | return -EFAULT; | |
1378 | ||
cedc5469 MH |
1379 | lock_sock(sk); |
1380 | ||
1381 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { | |
c2371e80 | 1382 | err = -EBADFD; |
cedc5469 MH |
1383 | goto done; |
1384 | } | |
1385 | ||
1da177e4 LT |
1386 | switch (optname) { |
1387 | case HCI_DATA_DIR: | |
1388 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR) | |
1389 | opt = 1; | |
8e87d142 | 1390 | else |
1da177e4 LT |
1391 | opt = 0; |
1392 | ||
1393 | if (put_user(opt, optval)) | |
cedc5469 | 1394 | err = -EFAULT; |
1da177e4 LT |
1395 | break; |
1396 | ||
1397 | case HCI_TIME_STAMP: | |
1398 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP) | |
1399 | opt = 1; | |
8e87d142 | 1400 | else |
1da177e4 LT |
1401 | opt = 0; |
1402 | ||
1403 | if (put_user(opt, optval)) | |
cedc5469 | 1404 | err = -EFAULT; |
1da177e4 LT |
1405 | break; |
1406 | ||
1407 | case HCI_FILTER: | |
1408 | { | |
1409 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1410 | ||
e15ca9a0 | 1411 | memset(&uf, 0, sizeof(uf)); |
1da177e4 LT |
1412 | uf.type_mask = f->type_mask; |
1413 | uf.opcode = f->opcode; | |
1414 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
1415 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
1416 | } | |
1417 | ||
1418 | len = min_t(unsigned int, len, sizeof(uf)); | |
1419 | if (copy_to_user(optval, &uf, len)) | |
cedc5469 | 1420 | err = -EFAULT; |
1da177e4 LT |
1421 | break; |
1422 | ||
1423 | default: | |
cedc5469 | 1424 | err = -ENOPROTOOPT; |
1da177e4 LT |
1425 | break; |
1426 | } | |
1427 | ||
cedc5469 MH |
1428 | done: |
1429 | release_sock(sk); | |
1430 | return err; | |
1da177e4 LT |
1431 | } |
1432 | ||
90ddc4f0 | 1433 | static const struct proto_ops hci_sock_ops = { |
1da177e4 LT |
1434 | .family = PF_BLUETOOTH, |
1435 | .owner = THIS_MODULE, | |
1436 | .release = hci_sock_release, | |
1437 | .bind = hci_sock_bind, | |
1438 | .getname = hci_sock_getname, | |
1439 | .sendmsg = hci_sock_sendmsg, | |
1440 | .recvmsg = hci_sock_recvmsg, | |
1441 | .ioctl = hci_sock_ioctl, | |
1442 | .poll = datagram_poll, | |
1443 | .listen = sock_no_listen, | |
1444 | .shutdown = sock_no_shutdown, | |
1445 | .setsockopt = hci_sock_setsockopt, | |
1446 | .getsockopt = hci_sock_getsockopt, | |
1447 | .connect = sock_no_connect, | |
1448 | .socketpair = sock_no_socketpair, | |
1449 | .accept = sock_no_accept, | |
1450 | .mmap = sock_no_mmap | |
1451 | }; | |
1452 | ||
1453 | static struct proto hci_sk_proto = { | |
1454 | .name = "HCI", | |
1455 | .owner = THIS_MODULE, | |
1456 | .obj_size = sizeof(struct hci_pinfo) | |
1457 | }; | |
1458 | ||
3f378b68 EP |
1459 | static int hci_sock_create(struct net *net, struct socket *sock, int protocol, |
1460 | int kern) | |
1da177e4 LT |
1461 | { |
1462 | struct sock *sk; | |
1463 | ||
1464 | BT_DBG("sock %p", sock); | |
1465 | ||
1466 | if (sock->type != SOCK_RAW) | |
1467 | return -ESOCKTNOSUPPORT; | |
1468 | ||
1469 | sock->ops = &hci_sock_ops; | |
1470 | ||
11aa9c28 | 1471 | sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern); |
1da177e4 LT |
1472 | if (!sk) |
1473 | return -ENOMEM; | |
1474 | ||
1475 | sock_init_data(sock, sk); | |
1476 | ||
1477 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1478 | ||
1479 | sk->sk_protocol = protocol; | |
1480 | ||
1481 | sock->state = SS_UNCONNECTED; | |
1482 | sk->sk_state = BT_OPEN; | |
1483 | ||
1484 | bt_sock_link(&hci_sk_list, sk); | |
1485 | return 0; | |
1486 | } | |
1487 | ||
ec1b4cf7 | 1488 | static const struct net_proto_family hci_sock_family_ops = { |
1da177e4 LT |
1489 | .family = PF_BLUETOOTH, |
1490 | .owner = THIS_MODULE, | |
1491 | .create = hci_sock_create, | |
1492 | }; | |
1493 | ||
1da177e4 LT |
1494 | int __init hci_sock_init(void) |
1495 | { | |
1496 | int err; | |
1497 | ||
b0a8e282 MH |
1498 | BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr)); |
1499 | ||
1da177e4 LT |
1500 | err = proto_register(&hci_sk_proto, 0); |
1501 | if (err < 0) | |
1502 | return err; | |
1503 | ||
1504 | err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops); | |
f7c86637 MY |
1505 | if (err < 0) { |
1506 | BT_ERR("HCI socket registration failed"); | |
1da177e4 | 1507 | goto error; |
f7c86637 MY |
1508 | } |
1509 | ||
b0316615 | 1510 | err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL); |
f7c86637 MY |
1511 | if (err < 0) { |
1512 | BT_ERR("Failed to create HCI proc file"); | |
1513 | bt_sock_unregister(BTPROTO_HCI); | |
1514 | goto error; | |
1515 | } | |
1da177e4 | 1516 | |
1da177e4 LT |
1517 | BT_INFO("HCI socket layer initialized"); |
1518 | ||
1519 | return 0; | |
1520 | ||
1521 | error: | |
1da177e4 LT |
1522 | proto_unregister(&hci_sk_proto); |
1523 | return err; | |
1524 | } | |
1525 | ||
b7440a14 | 1526 | void hci_sock_cleanup(void) |
1da177e4 | 1527 | { |
f7c86637 | 1528 | bt_procfs_cleanup(&init_net, "hci"); |
5e9d7f86 | 1529 | bt_sock_unregister(BTPROTO_HCI); |
1da177e4 | 1530 | proto_unregister(&hci_sk_proto); |
1da177e4 | 1531 | } |