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 | ||
123 | if (bt_cb(skb)->pkt_type == HCI_VENDOR_PKT) | |
124 | flt_type = 0; | |
125 | else | |
126 | flt_type = bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS; | |
127 | ||
128 | if (!test_bit(flt_type, &flt->type_mask)) | |
129 | return true; | |
130 | ||
131 | /* Extra filter for event packets only */ | |
132 | if (bt_cb(skb)->pkt_type != HCI_EVENT_PKT) | |
133 | return false; | |
134 | ||
135 | flt_event = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS); | |
136 | ||
137 | if (!hci_test_bit(flt_event, &flt->event_mask)) | |
138 | return true; | |
139 | ||
140 | /* Check filter only when opcode is set */ | |
141 | if (!flt->opcode) | |
142 | return false; | |
143 | ||
144 | if (flt_event == HCI_EV_CMD_COMPLETE && | |
145 | flt->opcode != get_unaligned((__le16 *)(skb->data + 3))) | |
146 | return true; | |
147 | ||
148 | if (flt_event == HCI_EV_CMD_STATUS && | |
149 | flt->opcode != get_unaligned((__le16 *)(skb->data + 4))) | |
150 | return true; | |
151 | ||
152 | return false; | |
153 | } | |
154 | ||
1da177e4 | 155 | /* Send frame to RAW socket */ |
470fe1b5 | 156 | void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 LT |
157 | { |
158 | struct sock *sk; | |
e0edf373 | 159 | struct sk_buff *skb_copy = NULL; |
1da177e4 LT |
160 | |
161 | BT_DBG("hdev %p len %d", hdev, skb->len); | |
162 | ||
163 | read_lock(&hci_sk_list.lock); | |
470fe1b5 | 164 | |
b67bfe0d | 165 | sk_for_each(sk, &hci_sk_list.head) { |
1da177e4 LT |
166 | struct sk_buff *nskb; |
167 | ||
168 | if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev) | |
169 | continue; | |
170 | ||
171 | /* Don't send frame to the socket it came from */ | |
172 | if (skb->sk == sk) | |
173 | continue; | |
174 | ||
23500189 MH |
175 | if (hci_pi(sk)->channel == HCI_CHANNEL_RAW) { |
176 | if (is_filtered_packet(sk, skb)) | |
177 | continue; | |
178 | } else if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { | |
179 | if (!bt_cb(skb)->incoming) | |
180 | continue; | |
181 | if (bt_cb(skb)->pkt_type != HCI_EVENT_PKT && | |
182 | bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT && | |
183 | bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) | |
184 | continue; | |
185 | } else { | |
186 | /* Don't send frame to other channel types */ | |
1da177e4 | 187 | continue; |
23500189 | 188 | } |
1da177e4 | 189 | |
e0edf373 MH |
190 | if (!skb_copy) { |
191 | /* Create a private copy with headroom */ | |
bad93e9d | 192 | skb_copy = __pskb_copy_fclone(skb, 1, GFP_ATOMIC, true); |
e0edf373 MH |
193 | if (!skb_copy) |
194 | continue; | |
195 | ||
196 | /* Put type byte before the data */ | |
197 | memcpy(skb_push(skb_copy, 1), &bt_cb(skb)->pkt_type, 1); | |
198 | } | |
199 | ||
200 | nskb = skb_clone(skb_copy, GFP_ATOMIC); | |
70f23020 | 201 | if (!nskb) |
1da177e4 LT |
202 | continue; |
203 | ||
470fe1b5 MH |
204 | if (sock_queue_rcv_skb(sk, nskb)) |
205 | kfree_skb(nskb); | |
206 | } | |
207 | ||
208 | read_unlock(&hci_sk_list.lock); | |
e0edf373 MH |
209 | |
210 | kfree_skb(skb_copy); | |
470fe1b5 MH |
211 | } |
212 | ||
7129069e JH |
213 | /* Send frame to sockets with specific channel */ |
214 | void hci_send_to_channel(unsigned short channel, struct sk_buff *skb, | |
c08b1a1d | 215 | int flag, struct sock *skip_sk) |
470fe1b5 MH |
216 | { |
217 | struct sock *sk; | |
470fe1b5 | 218 | |
7129069e | 219 | BT_DBG("channel %u len %d", channel, skb->len); |
470fe1b5 MH |
220 | |
221 | read_lock(&hci_sk_list.lock); | |
222 | ||
b67bfe0d | 223 | sk_for_each(sk, &hci_sk_list.head) { |
470fe1b5 MH |
224 | struct sk_buff *nskb; |
225 | ||
c08b1a1d | 226 | /* Ignore socket without the flag set */ |
c85be545 | 227 | if (!hci_sock_test_flag(sk, flag)) |
d7f72f61 MH |
228 | continue; |
229 | ||
c08b1a1d MH |
230 | /* Skip the original socket */ |
231 | if (sk == skip_sk) | |
17711c62 MH |
232 | continue; |
233 | ||
234 | if (sk->sk_state != BT_BOUND) | |
235 | continue; | |
236 | ||
237 | if (hci_pi(sk)->channel != channel) | |
238 | continue; | |
239 | ||
240 | nskb = skb_clone(skb, GFP_ATOMIC); | |
241 | if (!nskb) | |
242 | continue; | |
243 | ||
244 | if (sock_queue_rcv_skb(sk, nskb)) | |
245 | kfree_skb(nskb); | |
246 | } | |
247 | ||
248 | read_unlock(&hci_sk_list.lock); | |
249 | } | |
250 | ||
cd82e61c MH |
251 | /* Send frame to monitor socket */ |
252 | void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb) | |
253 | { | |
cd82e61c | 254 | struct sk_buff *skb_copy = NULL; |
2b531294 | 255 | struct hci_mon_hdr *hdr; |
cd82e61c MH |
256 | __le16 opcode; |
257 | ||
258 | if (!atomic_read(&monitor_promisc)) | |
259 | return; | |
260 | ||
261 | BT_DBG("hdev %p len %d", hdev, skb->len); | |
262 | ||
263 | switch (bt_cb(skb)->pkt_type) { | |
264 | case HCI_COMMAND_PKT: | |
dcf4adbf | 265 | opcode = cpu_to_le16(HCI_MON_COMMAND_PKT); |
cd82e61c MH |
266 | break; |
267 | case HCI_EVENT_PKT: | |
dcf4adbf | 268 | opcode = cpu_to_le16(HCI_MON_EVENT_PKT); |
cd82e61c MH |
269 | break; |
270 | case HCI_ACLDATA_PKT: | |
271 | if (bt_cb(skb)->incoming) | |
dcf4adbf | 272 | opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT); |
cd82e61c | 273 | else |
dcf4adbf | 274 | opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT); |
cd82e61c MH |
275 | break; |
276 | case HCI_SCODATA_PKT: | |
277 | if (bt_cb(skb)->incoming) | |
dcf4adbf | 278 | opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT); |
cd82e61c | 279 | else |
dcf4adbf | 280 | opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT); |
cd82e61c MH |
281 | break; |
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; | |
306 | struct sk_buff *skb; | |
307 | __le16 opcode; | |
308 | ||
309 | switch (event) { | |
310 | case HCI_DEV_REG: | |
311 | skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC); | |
312 | if (!skb) | |
313 | return NULL; | |
314 | ||
315 | ni = (void *) skb_put(skb, HCI_MON_NEW_INDEX_SIZE); | |
316 | ni->type = hdev->dev_type; | |
317 | ni->bus = hdev->bus; | |
318 | bacpy(&ni->bdaddr, &hdev->bdaddr); | |
319 | memcpy(ni->name, hdev->name, 8); | |
320 | ||
dcf4adbf | 321 | opcode = cpu_to_le16(HCI_MON_NEW_INDEX); |
cd82e61c MH |
322 | break; |
323 | ||
324 | case HCI_DEV_UNREG: | |
325 | skb = bt_skb_alloc(0, GFP_ATOMIC); | |
326 | if (!skb) | |
327 | return NULL; | |
328 | ||
dcf4adbf | 329 | opcode = cpu_to_le16(HCI_MON_DEL_INDEX); |
cd82e61c MH |
330 | break; |
331 | ||
332 | default: | |
333 | return NULL; | |
334 | } | |
335 | ||
336 | __net_timestamp(skb); | |
337 | ||
338 | hdr = (void *) skb_push(skb, HCI_MON_HDR_SIZE); | |
339 | hdr->opcode = opcode; | |
340 | hdr->index = cpu_to_le16(hdev->id); | |
341 | hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); | |
342 | ||
343 | return skb; | |
344 | } | |
345 | ||
346 | static void send_monitor_replay(struct sock *sk) | |
347 | { | |
348 | struct hci_dev *hdev; | |
349 | ||
350 | read_lock(&hci_dev_list_lock); | |
351 | ||
352 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
353 | struct sk_buff *skb; | |
354 | ||
355 | skb = create_monitor_event(hdev, HCI_DEV_REG); | |
356 | if (!skb) | |
357 | continue; | |
358 | ||
359 | if (sock_queue_rcv_skb(sk, skb)) | |
360 | kfree_skb(skb); | |
361 | } | |
362 | ||
363 | read_unlock(&hci_dev_list_lock); | |
364 | } | |
365 | ||
040030ef MH |
366 | /* Generate internal stack event */ |
367 | static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data) | |
368 | { | |
369 | struct hci_event_hdr *hdr; | |
370 | struct hci_ev_stack_internal *ev; | |
371 | struct sk_buff *skb; | |
372 | ||
373 | skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC); | |
374 | if (!skb) | |
375 | return; | |
376 | ||
377 | hdr = (void *) skb_put(skb, HCI_EVENT_HDR_SIZE); | |
378 | hdr->evt = HCI_EV_STACK_INTERNAL; | |
379 | hdr->plen = sizeof(*ev) + dlen; | |
380 | ||
381 | ev = (void *) skb_put(skb, sizeof(*ev) + dlen); | |
382 | ev->type = type; | |
383 | memcpy(ev->data, data, dlen); | |
384 | ||
385 | bt_cb(skb)->incoming = 1; | |
386 | __net_timestamp(skb); | |
387 | ||
388 | bt_cb(skb)->pkt_type = HCI_EVENT_PKT; | |
040030ef MH |
389 | hci_send_to_sock(hdev, skb); |
390 | kfree_skb(skb); | |
391 | } | |
392 | ||
393 | void hci_sock_dev_event(struct hci_dev *hdev, int event) | |
394 | { | |
395 | struct hci_ev_si_device ev; | |
396 | ||
397 | BT_DBG("hdev %s event %d", hdev->name, event); | |
398 | ||
cd82e61c MH |
399 | /* Send event to monitor */ |
400 | if (atomic_read(&monitor_promisc)) { | |
401 | struct sk_buff *skb; | |
402 | ||
403 | skb = create_monitor_event(hdev, event); | |
404 | if (skb) { | |
c08b1a1d MH |
405 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, |
406 | HCI_SOCK_TRUSTED, NULL); | |
cd82e61c MH |
407 | kfree_skb(skb); |
408 | } | |
409 | } | |
410 | ||
040030ef MH |
411 | /* Send event to sockets */ |
412 | ev.event = event; | |
413 | ev.dev_id = hdev->id; | |
414 | hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev); | |
415 | ||
416 | if (event == HCI_DEV_UNREG) { | |
417 | struct sock *sk; | |
040030ef MH |
418 | |
419 | /* Detach sockets from device */ | |
420 | read_lock(&hci_sk_list.lock); | |
b67bfe0d | 421 | sk_for_each(sk, &hci_sk_list.head) { |
040030ef MH |
422 | bh_lock_sock_nested(sk); |
423 | if (hci_pi(sk)->hdev == hdev) { | |
424 | hci_pi(sk)->hdev = NULL; | |
425 | sk->sk_err = EPIPE; | |
426 | sk->sk_state = BT_OPEN; | |
427 | sk->sk_state_change(sk); | |
428 | ||
429 | hci_dev_put(hdev); | |
430 | } | |
431 | bh_unlock_sock(sk); | |
432 | } | |
433 | read_unlock(&hci_sk_list.lock); | |
434 | } | |
435 | } | |
436 | ||
801c1e8d JH |
437 | static struct hci_mgmt_chan *__hci_mgmt_chan_find(unsigned short channel) |
438 | { | |
439 | struct hci_mgmt_chan *c; | |
440 | ||
441 | list_for_each_entry(c, &mgmt_chan_list, list) { | |
442 | if (c->channel == channel) | |
443 | return c; | |
444 | } | |
445 | ||
446 | return NULL; | |
447 | } | |
448 | ||
449 | static struct hci_mgmt_chan *hci_mgmt_chan_find(unsigned short channel) | |
450 | { | |
451 | struct hci_mgmt_chan *c; | |
452 | ||
453 | mutex_lock(&mgmt_chan_list_lock); | |
454 | c = __hci_mgmt_chan_find(channel); | |
455 | mutex_unlock(&mgmt_chan_list_lock); | |
456 | ||
457 | return c; | |
458 | } | |
459 | ||
460 | int hci_mgmt_chan_register(struct hci_mgmt_chan *c) | |
461 | { | |
462 | if (c->channel < HCI_CHANNEL_CONTROL) | |
463 | return -EINVAL; | |
464 | ||
465 | mutex_lock(&mgmt_chan_list_lock); | |
466 | if (__hci_mgmt_chan_find(c->channel)) { | |
467 | mutex_unlock(&mgmt_chan_list_lock); | |
468 | return -EALREADY; | |
469 | } | |
470 | ||
471 | list_add_tail(&c->list, &mgmt_chan_list); | |
472 | ||
473 | mutex_unlock(&mgmt_chan_list_lock); | |
474 | ||
475 | return 0; | |
476 | } | |
477 | EXPORT_SYMBOL(hci_mgmt_chan_register); | |
478 | ||
479 | void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c) | |
480 | { | |
481 | mutex_lock(&mgmt_chan_list_lock); | |
482 | list_del(&c->list); | |
483 | mutex_unlock(&mgmt_chan_list_lock); | |
484 | } | |
485 | EXPORT_SYMBOL(hci_mgmt_chan_unregister); | |
486 | ||
1da177e4 LT |
487 | static int hci_sock_release(struct socket *sock) |
488 | { | |
489 | struct sock *sk = sock->sk; | |
7b005bd3 | 490 | struct hci_dev *hdev; |
1da177e4 LT |
491 | |
492 | BT_DBG("sock %p sk %p", sock, sk); | |
493 | ||
494 | if (!sk) | |
495 | return 0; | |
496 | ||
7b005bd3 MH |
497 | hdev = hci_pi(sk)->hdev; |
498 | ||
cd82e61c MH |
499 | if (hci_pi(sk)->channel == HCI_CHANNEL_MONITOR) |
500 | atomic_dec(&monitor_promisc); | |
501 | ||
1da177e4 LT |
502 | bt_sock_unlink(&hci_sk_list, sk); |
503 | ||
504 | if (hdev) { | |
23500189 | 505 | if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { |
0602a8ad | 506 | mgmt_index_added(hdev); |
a358dc11 | 507 | hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); |
23500189 MH |
508 | hci_dev_close(hdev->id); |
509 | } | |
510 | ||
1da177e4 LT |
511 | atomic_dec(&hdev->promisc); |
512 | hci_dev_put(hdev); | |
513 | } | |
514 | ||
515 | sock_orphan(sk); | |
516 | ||
517 | skb_queue_purge(&sk->sk_receive_queue); | |
518 | skb_queue_purge(&sk->sk_write_queue); | |
519 | ||
520 | sock_put(sk); | |
521 | return 0; | |
522 | } | |
523 | ||
b2a66aad | 524 | static int hci_sock_blacklist_add(struct hci_dev *hdev, void __user *arg) |
f0358568 JH |
525 | { |
526 | bdaddr_t bdaddr; | |
5e762444 | 527 | int err; |
f0358568 JH |
528 | |
529 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
530 | return -EFAULT; | |
531 | ||
09fd0de5 | 532 | hci_dev_lock(hdev); |
5e762444 | 533 | |
dcc36c16 | 534 | err = hci_bdaddr_list_add(&hdev->blacklist, &bdaddr, BDADDR_BREDR); |
5e762444 | 535 | |
09fd0de5 | 536 | hci_dev_unlock(hdev); |
5e762444 AJ |
537 | |
538 | return err; | |
f0358568 JH |
539 | } |
540 | ||
b2a66aad | 541 | static int hci_sock_blacklist_del(struct hci_dev *hdev, void __user *arg) |
f0358568 JH |
542 | { |
543 | bdaddr_t bdaddr; | |
5e762444 | 544 | int err; |
f0358568 JH |
545 | |
546 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
547 | return -EFAULT; | |
548 | ||
09fd0de5 | 549 | hci_dev_lock(hdev); |
5e762444 | 550 | |
dcc36c16 | 551 | err = hci_bdaddr_list_del(&hdev->blacklist, &bdaddr, BDADDR_BREDR); |
5e762444 | 552 | |
09fd0de5 | 553 | hci_dev_unlock(hdev); |
5e762444 AJ |
554 | |
555 | return err; | |
f0358568 JH |
556 | } |
557 | ||
8e87d142 | 558 | /* Ioctls that require bound socket */ |
6039aa73 GP |
559 | static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, |
560 | unsigned long arg) | |
1da177e4 LT |
561 | { |
562 | struct hci_dev *hdev = hci_pi(sk)->hdev; | |
563 | ||
564 | if (!hdev) | |
565 | return -EBADFD; | |
566 | ||
d7a5a11d | 567 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) |
0736cfa8 MH |
568 | return -EBUSY; |
569 | ||
d7a5a11d | 570 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) |
fee746b0 MH |
571 | return -EOPNOTSUPP; |
572 | ||
5b69bef5 MH |
573 | if (hdev->dev_type != HCI_BREDR) |
574 | return -EOPNOTSUPP; | |
575 | ||
1da177e4 LT |
576 | switch (cmd) { |
577 | case HCISETRAW: | |
578 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 579 | return -EPERM; |
db596681 | 580 | return -EOPNOTSUPP; |
1da177e4 | 581 | |
1da177e4 | 582 | case HCIGETCONNINFO: |
40be492f MH |
583 | return hci_get_conn_info(hdev, (void __user *) arg); |
584 | ||
585 | case HCIGETAUTHINFO: | |
586 | return hci_get_auth_info(hdev, (void __user *) arg); | |
1da177e4 | 587 | |
f0358568 JH |
588 | case HCIBLOCKADDR: |
589 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 590 | return -EPERM; |
b2a66aad | 591 | return hci_sock_blacklist_add(hdev, (void __user *) arg); |
f0358568 JH |
592 | |
593 | case HCIUNBLOCKADDR: | |
594 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 595 | return -EPERM; |
b2a66aad | 596 | return hci_sock_blacklist_del(hdev, (void __user *) arg); |
1da177e4 | 597 | } |
0736cfa8 | 598 | |
324d36ed | 599 | return -ENOIOCTLCMD; |
1da177e4 LT |
600 | } |
601 | ||
8fc9ced3 GP |
602 | static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, |
603 | unsigned long arg) | |
1da177e4 | 604 | { |
40be492f | 605 | void __user *argp = (void __user *) arg; |
0736cfa8 | 606 | struct sock *sk = sock->sk; |
1da177e4 LT |
607 | int err; |
608 | ||
609 | BT_DBG("cmd %x arg %lx", cmd, arg); | |
610 | ||
c1c4f956 MH |
611 | lock_sock(sk); |
612 | ||
613 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { | |
614 | err = -EBADFD; | |
615 | goto done; | |
616 | } | |
617 | ||
618 | release_sock(sk); | |
619 | ||
1da177e4 LT |
620 | switch (cmd) { |
621 | case HCIGETDEVLIST: | |
622 | return hci_get_dev_list(argp); | |
623 | ||
624 | case HCIGETDEVINFO: | |
625 | return hci_get_dev_info(argp); | |
626 | ||
627 | case HCIGETCONNLIST: | |
628 | return hci_get_conn_list(argp); | |
629 | ||
630 | case HCIDEVUP: | |
631 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 632 | return -EPERM; |
1da177e4 LT |
633 | return hci_dev_open(arg); |
634 | ||
635 | case HCIDEVDOWN: | |
636 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 637 | return -EPERM; |
1da177e4 LT |
638 | return hci_dev_close(arg); |
639 | ||
640 | case HCIDEVRESET: | |
641 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 642 | return -EPERM; |
1da177e4 LT |
643 | return hci_dev_reset(arg); |
644 | ||
645 | case HCIDEVRESTAT: | |
646 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 647 | return -EPERM; |
1da177e4 LT |
648 | return hci_dev_reset_stat(arg); |
649 | ||
650 | case HCISETSCAN: | |
651 | case HCISETAUTH: | |
652 | case HCISETENCRYPT: | |
653 | case HCISETPTYPE: | |
654 | case HCISETLINKPOL: | |
655 | case HCISETLINKMODE: | |
656 | case HCISETACLMTU: | |
657 | case HCISETSCOMTU: | |
658 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 659 | return -EPERM; |
1da177e4 LT |
660 | return hci_dev_cmd(cmd, argp); |
661 | ||
662 | case HCIINQUIRY: | |
663 | return hci_inquiry(argp); | |
1da177e4 | 664 | } |
c1c4f956 MH |
665 | |
666 | lock_sock(sk); | |
667 | ||
668 | err = hci_sock_bound_ioctl(sk, cmd, arg); | |
669 | ||
670 | done: | |
671 | release_sock(sk); | |
672 | return err; | |
1da177e4 LT |
673 | } |
674 | ||
8fc9ced3 GP |
675 | static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, |
676 | int addr_len) | |
1da177e4 | 677 | { |
0381101f | 678 | struct sockaddr_hci haddr; |
1da177e4 LT |
679 | struct sock *sk = sock->sk; |
680 | struct hci_dev *hdev = NULL; | |
0381101f | 681 | int len, err = 0; |
1da177e4 LT |
682 | |
683 | BT_DBG("sock %p sk %p", sock, sk); | |
684 | ||
0381101f JH |
685 | if (!addr) |
686 | return -EINVAL; | |
687 | ||
688 | memset(&haddr, 0, sizeof(haddr)); | |
689 | len = min_t(unsigned int, sizeof(haddr), addr_len); | |
690 | memcpy(&haddr, addr, len); | |
691 | ||
692 | if (haddr.hci_family != AF_BLUETOOTH) | |
693 | return -EINVAL; | |
694 | ||
1da177e4 LT |
695 | lock_sock(sk); |
696 | ||
7cc2ade2 | 697 | if (sk->sk_state == BT_BOUND) { |
1da177e4 LT |
698 | err = -EALREADY; |
699 | goto done; | |
700 | } | |
701 | ||
7cc2ade2 MH |
702 | switch (haddr.hci_channel) { |
703 | case HCI_CHANNEL_RAW: | |
704 | if (hci_pi(sk)->hdev) { | |
705 | err = -EALREADY; | |
1da177e4 LT |
706 | goto done; |
707 | } | |
708 | ||
7cc2ade2 MH |
709 | if (haddr.hci_dev != HCI_DEV_NONE) { |
710 | hdev = hci_dev_get(haddr.hci_dev); | |
711 | if (!hdev) { | |
712 | err = -ENODEV; | |
713 | goto done; | |
714 | } | |
715 | ||
716 | atomic_inc(&hdev->promisc); | |
717 | } | |
718 | ||
719 | hci_pi(sk)->hdev = hdev; | |
720 | break; | |
721 | ||
23500189 MH |
722 | case HCI_CHANNEL_USER: |
723 | if (hci_pi(sk)->hdev) { | |
724 | err = -EALREADY; | |
725 | goto done; | |
726 | } | |
727 | ||
728 | if (haddr.hci_dev == HCI_DEV_NONE) { | |
729 | err = -EINVAL; | |
730 | goto done; | |
731 | } | |
732 | ||
10a8b86f | 733 | if (!capable(CAP_NET_ADMIN)) { |
23500189 MH |
734 | err = -EPERM; |
735 | goto done; | |
736 | } | |
737 | ||
738 | hdev = hci_dev_get(haddr.hci_dev); | |
739 | if (!hdev) { | |
740 | err = -ENODEV; | |
741 | goto done; | |
742 | } | |
743 | ||
744 | if (test_bit(HCI_UP, &hdev->flags) || | |
745 | test_bit(HCI_INIT, &hdev->flags) || | |
d7a5a11d MH |
746 | hci_dev_test_flag(hdev, HCI_SETUP) || |
747 | hci_dev_test_flag(hdev, HCI_CONFIG)) { | |
23500189 MH |
748 | err = -EBUSY; |
749 | hci_dev_put(hdev); | |
750 | goto done; | |
751 | } | |
752 | ||
238be788 | 753 | if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) { |
23500189 MH |
754 | err = -EUSERS; |
755 | hci_dev_put(hdev); | |
756 | goto done; | |
757 | } | |
758 | ||
0602a8ad | 759 | mgmt_index_removed(hdev); |
23500189 MH |
760 | |
761 | err = hci_dev_open(hdev->id); | |
762 | if (err) { | |
a358dc11 | 763 | hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); |
0602a8ad | 764 | mgmt_index_added(hdev); |
23500189 MH |
765 | hci_dev_put(hdev); |
766 | goto done; | |
767 | } | |
768 | ||
769 | atomic_inc(&hdev->promisc); | |
770 | ||
771 | hci_pi(sk)->hdev = hdev; | |
772 | break; | |
773 | ||
cd82e61c MH |
774 | case HCI_CHANNEL_MONITOR: |
775 | if (haddr.hci_dev != HCI_DEV_NONE) { | |
776 | err = -EINVAL; | |
777 | goto done; | |
778 | } | |
779 | ||
780 | if (!capable(CAP_NET_RAW)) { | |
781 | err = -EPERM; | |
782 | goto done; | |
783 | } | |
784 | ||
50ebc055 MH |
785 | /* The monitor interface is restricted to CAP_NET_RAW |
786 | * capabilities and with that implicitly trusted. | |
787 | */ | |
788 | hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); | |
789 | ||
cd82e61c MH |
790 | send_monitor_replay(sk); |
791 | ||
792 | atomic_inc(&monitor_promisc); | |
793 | break; | |
794 | ||
7cc2ade2 | 795 | default: |
801c1e8d JH |
796 | if (!hci_mgmt_chan_find(haddr.hci_channel)) { |
797 | err = -EINVAL; | |
798 | goto done; | |
799 | } | |
800 | ||
801 | if (haddr.hci_dev != HCI_DEV_NONE) { | |
802 | err = -EINVAL; | |
803 | goto done; | |
804 | } | |
805 | ||
1195fbb8 MH |
806 | /* Users with CAP_NET_ADMIN capabilities are allowed |
807 | * access to all management commands and events. For | |
808 | * untrusted users the interface is restricted and | |
809 | * also only untrusted events are sent. | |
50ebc055 | 810 | */ |
1195fbb8 MH |
811 | if (capable(CAP_NET_ADMIN)) |
812 | hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); | |
50ebc055 | 813 | |
f9207338 MH |
814 | /* At the moment the index and unconfigured index events |
815 | * are enabled unconditionally. Setting them on each | |
816 | * socket when binding keeps this functionality. They | |
817 | * however might be cleared later and then sending of these | |
818 | * events will be disabled, but that is then intentional. | |
f6b7712e MH |
819 | * |
820 | * This also enables generic events that are safe to be | |
821 | * received by untrusted users. Example for such events | |
822 | * are changes to settings, class of device, name etc. | |
f9207338 MH |
823 | */ |
824 | if (haddr.hci_channel == HCI_CHANNEL_CONTROL) { | |
825 | hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS); | |
826 | hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS); | |
f6b7712e | 827 | hci_sock_set_flag(sk, HCI_MGMT_GENERIC_EVENTS); |
f9207338 | 828 | } |
801c1e8d | 829 | break; |
1da177e4 LT |
830 | } |
831 | ||
7cc2ade2 | 832 | |
0381101f | 833 | hci_pi(sk)->channel = haddr.hci_channel; |
1da177e4 LT |
834 | sk->sk_state = BT_BOUND; |
835 | ||
836 | done: | |
837 | release_sock(sk); | |
838 | return err; | |
839 | } | |
840 | ||
8fc9ced3 GP |
841 | static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, |
842 | int *addr_len, int peer) | |
1da177e4 LT |
843 | { |
844 | struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr; | |
845 | struct sock *sk = sock->sk; | |
9d4b68b2 MH |
846 | struct hci_dev *hdev; |
847 | int err = 0; | |
1da177e4 LT |
848 | |
849 | BT_DBG("sock %p sk %p", sock, sk); | |
850 | ||
06f43cbc MH |
851 | if (peer) |
852 | return -EOPNOTSUPP; | |
853 | ||
1da177e4 LT |
854 | lock_sock(sk); |
855 | ||
9d4b68b2 MH |
856 | hdev = hci_pi(sk)->hdev; |
857 | if (!hdev) { | |
858 | err = -EBADFD; | |
859 | goto done; | |
860 | } | |
861 | ||
1da177e4 LT |
862 | *addr_len = sizeof(*haddr); |
863 | haddr->hci_family = AF_BLUETOOTH; | |
7b005bd3 | 864 | haddr->hci_dev = hdev->id; |
9d4b68b2 | 865 | haddr->hci_channel= hci_pi(sk)->channel; |
1da177e4 | 866 | |
9d4b68b2 | 867 | done: |
1da177e4 | 868 | release_sock(sk); |
9d4b68b2 | 869 | return err; |
1da177e4 LT |
870 | } |
871 | ||
6039aa73 GP |
872 | static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, |
873 | struct sk_buff *skb) | |
1da177e4 LT |
874 | { |
875 | __u32 mask = hci_pi(sk)->cmsg_mask; | |
876 | ||
0d48d939 MH |
877 | if (mask & HCI_CMSG_DIR) { |
878 | int incoming = bt_cb(skb)->incoming; | |
8fc9ced3 GP |
879 | put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), |
880 | &incoming); | |
0d48d939 | 881 | } |
1da177e4 | 882 | |
a61bbcf2 | 883 | if (mask & HCI_CMSG_TSTAMP) { |
f6e623a6 JFS |
884 | #ifdef CONFIG_COMPAT |
885 | struct compat_timeval ctv; | |
886 | #endif | |
a61bbcf2 | 887 | struct timeval tv; |
767c5eb5 MH |
888 | void *data; |
889 | int len; | |
a61bbcf2 PM |
890 | |
891 | skb_get_timestamp(skb, &tv); | |
767c5eb5 | 892 | |
1da97f83 DM |
893 | data = &tv; |
894 | len = sizeof(tv); | |
895 | #ifdef CONFIG_COMPAT | |
da88cea1 L |
896 | if (!COMPAT_USE_64BIT_TIME && |
897 | (msg->msg_flags & MSG_CMSG_COMPAT)) { | |
767c5eb5 MH |
898 | ctv.tv_sec = tv.tv_sec; |
899 | ctv.tv_usec = tv.tv_usec; | |
900 | data = &ctv; | |
901 | len = sizeof(ctv); | |
767c5eb5 | 902 | } |
1da97f83 | 903 | #endif |
767c5eb5 MH |
904 | |
905 | put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data); | |
a61bbcf2 | 906 | } |
1da177e4 | 907 | } |
8e87d142 | 908 | |
1b784140 YX |
909 | static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
910 | int flags) | |
1da177e4 LT |
911 | { |
912 | int noblock = flags & MSG_DONTWAIT; | |
913 | struct sock *sk = sock->sk; | |
914 | struct sk_buff *skb; | |
915 | int copied, err; | |
916 | ||
917 | BT_DBG("sock %p, sk %p", sock, sk); | |
918 | ||
919 | if (flags & (MSG_OOB)) | |
920 | return -EOPNOTSUPP; | |
921 | ||
922 | if (sk->sk_state == BT_CLOSED) | |
923 | return 0; | |
924 | ||
70f23020 AE |
925 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
926 | if (!skb) | |
1da177e4 LT |
927 | return err; |
928 | ||
1da177e4 LT |
929 | copied = skb->len; |
930 | if (len < copied) { | |
931 | msg->msg_flags |= MSG_TRUNC; | |
932 | copied = len; | |
933 | } | |
934 | ||
badff6d0 | 935 | skb_reset_transport_header(skb); |
51f3d02b | 936 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 | 937 | |
3a208627 MH |
938 | switch (hci_pi(sk)->channel) { |
939 | case HCI_CHANNEL_RAW: | |
940 | hci_sock_cmsg(sk, msg, skb); | |
941 | break; | |
23500189 | 942 | case HCI_CHANNEL_USER: |
cd82e61c MH |
943 | case HCI_CHANNEL_MONITOR: |
944 | sock_recv_timestamp(msg, sk, skb); | |
945 | break; | |
801c1e8d JH |
946 | default: |
947 | if (hci_mgmt_chan_find(hci_pi(sk)->channel)) | |
948 | sock_recv_timestamp(msg, sk, skb); | |
949 | break; | |
3a208627 | 950 | } |
1da177e4 LT |
951 | |
952 | skb_free_datagram(sk, skb); | |
953 | ||
954 | return err ? : copied; | |
955 | } | |
956 | ||
fa4335d7 JH |
957 | static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk, |
958 | struct msghdr *msg, size_t msglen) | |
959 | { | |
960 | void *buf; | |
961 | u8 *cp; | |
962 | struct mgmt_hdr *hdr; | |
963 | u16 opcode, index, len; | |
964 | struct hci_dev *hdev = NULL; | |
965 | const struct hci_mgmt_handler *handler; | |
966 | bool var_len, no_hdev; | |
967 | int err; | |
968 | ||
969 | BT_DBG("got %zu bytes", msglen); | |
970 | ||
971 | if (msglen < sizeof(*hdr)) | |
972 | return -EINVAL; | |
973 | ||
974 | buf = kmalloc(msglen, GFP_KERNEL); | |
975 | if (!buf) | |
976 | return -ENOMEM; | |
977 | ||
978 | if (memcpy_from_msg(buf, msg, msglen)) { | |
979 | err = -EFAULT; | |
980 | goto done; | |
981 | } | |
982 | ||
983 | hdr = buf; | |
984 | opcode = __le16_to_cpu(hdr->opcode); | |
985 | index = __le16_to_cpu(hdr->index); | |
986 | len = __le16_to_cpu(hdr->len); | |
987 | ||
988 | if (len != msglen - sizeof(*hdr)) { | |
989 | err = -EINVAL; | |
990 | goto done; | |
991 | } | |
992 | ||
993 | if (opcode >= chan->handler_count || | |
994 | chan->handlers[opcode].func == NULL) { | |
995 | BT_DBG("Unknown op %u", opcode); | |
996 | err = mgmt_cmd_status(sk, index, opcode, | |
997 | MGMT_STATUS_UNKNOWN_COMMAND); | |
998 | goto done; | |
999 | } | |
1000 | ||
1001 | handler = &chan->handlers[opcode]; | |
1002 | ||
1003 | if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) && | |
1004 | !(handler->flags & HCI_MGMT_UNTRUSTED)) { | |
1005 | err = mgmt_cmd_status(sk, index, opcode, | |
1006 | MGMT_STATUS_PERMISSION_DENIED); | |
1007 | goto done; | |
1008 | } | |
1009 | ||
1010 | if (index != MGMT_INDEX_NONE) { | |
1011 | hdev = hci_dev_get(index); | |
1012 | if (!hdev) { | |
1013 | err = mgmt_cmd_status(sk, index, opcode, | |
1014 | MGMT_STATUS_INVALID_INDEX); | |
1015 | goto done; | |
1016 | } | |
1017 | ||
1018 | if (hci_dev_test_flag(hdev, HCI_SETUP) || | |
1019 | hci_dev_test_flag(hdev, HCI_CONFIG) || | |
1020 | hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { | |
1021 | err = mgmt_cmd_status(sk, index, opcode, | |
1022 | MGMT_STATUS_INVALID_INDEX); | |
1023 | goto done; | |
1024 | } | |
1025 | ||
1026 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) && | |
1027 | !(handler->flags & HCI_MGMT_UNCONFIGURED)) { | |
1028 | err = mgmt_cmd_status(sk, index, opcode, | |
1029 | MGMT_STATUS_INVALID_INDEX); | |
1030 | goto done; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | no_hdev = (handler->flags & HCI_MGMT_NO_HDEV); | |
1035 | if (no_hdev != !hdev) { | |
1036 | err = mgmt_cmd_status(sk, index, opcode, | |
1037 | MGMT_STATUS_INVALID_INDEX); | |
1038 | goto done; | |
1039 | } | |
1040 | ||
1041 | var_len = (handler->flags & HCI_MGMT_VAR_LEN); | |
1042 | if ((var_len && len < handler->data_len) || | |
1043 | (!var_len && len != handler->data_len)) { | |
1044 | err = mgmt_cmd_status(sk, index, opcode, | |
1045 | MGMT_STATUS_INVALID_PARAMS); | |
1046 | goto done; | |
1047 | } | |
1048 | ||
1049 | if (hdev && chan->hdev_init) | |
1050 | chan->hdev_init(sk, hdev); | |
1051 | ||
1052 | cp = buf + sizeof(*hdr); | |
1053 | ||
1054 | err = handler->func(sk, hdev, cp, len); | |
1055 | if (err < 0) | |
1056 | goto done; | |
1057 | ||
1058 | err = msglen; | |
1059 | ||
1060 | done: | |
1061 | if (hdev) | |
1062 | hci_dev_put(hdev); | |
1063 | ||
1064 | kfree(buf); | |
1065 | return err; | |
1066 | } | |
1067 | ||
1b784140 YX |
1068 | static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
1069 | size_t len) | |
1da177e4 LT |
1070 | { |
1071 | struct sock *sk = sock->sk; | |
801c1e8d | 1072 | struct hci_mgmt_chan *chan; |
1da177e4 LT |
1073 | struct hci_dev *hdev; |
1074 | struct sk_buff *skb; | |
1075 | int err; | |
1076 | ||
1077 | BT_DBG("sock %p sk %p", sock, sk); | |
1078 | ||
1079 | if (msg->msg_flags & MSG_OOB) | |
1080 | return -EOPNOTSUPP; | |
1081 | ||
1082 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE)) | |
1083 | return -EINVAL; | |
1084 | ||
1085 | if (len < 4 || len > HCI_MAX_FRAME_SIZE) | |
1086 | return -EINVAL; | |
1087 | ||
1088 | lock_sock(sk); | |
1089 | ||
0381101f JH |
1090 | switch (hci_pi(sk)->channel) { |
1091 | case HCI_CHANNEL_RAW: | |
23500189 | 1092 | case HCI_CHANNEL_USER: |
0381101f | 1093 | break; |
cd82e61c MH |
1094 | case HCI_CHANNEL_MONITOR: |
1095 | err = -EOPNOTSUPP; | |
1096 | goto done; | |
0381101f | 1097 | default: |
801c1e8d JH |
1098 | mutex_lock(&mgmt_chan_list_lock); |
1099 | chan = __hci_mgmt_chan_find(hci_pi(sk)->channel); | |
1100 | if (chan) | |
fa4335d7 | 1101 | err = hci_mgmt_cmd(chan, sk, msg, len); |
801c1e8d JH |
1102 | else |
1103 | err = -EINVAL; | |
1104 | ||
1105 | mutex_unlock(&mgmt_chan_list_lock); | |
0381101f JH |
1106 | goto done; |
1107 | } | |
1108 | ||
70f23020 AE |
1109 | hdev = hci_pi(sk)->hdev; |
1110 | if (!hdev) { | |
1da177e4 LT |
1111 | err = -EBADFD; |
1112 | goto done; | |
1113 | } | |
1114 | ||
7e21addc MH |
1115 | if (!test_bit(HCI_UP, &hdev->flags)) { |
1116 | err = -ENETDOWN; | |
1117 | goto done; | |
1118 | } | |
1119 | ||
70f23020 AE |
1120 | skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err); |
1121 | if (!skb) | |
1da177e4 LT |
1122 | goto done; |
1123 | ||
6ce8e9ce | 1124 | if (memcpy_from_msg(skb_put(skb, len), msg, len)) { |
1da177e4 LT |
1125 | err = -EFAULT; |
1126 | goto drop; | |
1127 | } | |
1128 | ||
0d48d939 | 1129 | bt_cb(skb)->pkt_type = *((unsigned char *) skb->data); |
1da177e4 | 1130 | skb_pull(skb, 1); |
1da177e4 | 1131 | |
1bc5ad16 MH |
1132 | if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { |
1133 | /* No permission check is needed for user channel | |
1134 | * since that gets enforced when binding the socket. | |
1135 | * | |
1136 | * However check that the packet type is valid. | |
1137 | */ | |
1138 | if (bt_cb(skb)->pkt_type != HCI_COMMAND_PKT && | |
1139 | bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT && | |
1140 | bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) { | |
1141 | err = -EINVAL; | |
1142 | goto drop; | |
1143 | } | |
1144 | ||
1145 | skb_queue_tail(&hdev->raw_q, skb); | |
1146 | queue_work(hdev->workqueue, &hdev->tx_work); | |
1147 | } else if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) { | |
83985319 | 1148 | u16 opcode = get_unaligned_le16(skb->data); |
1da177e4 LT |
1149 | u16 ogf = hci_opcode_ogf(opcode); |
1150 | u16 ocf = hci_opcode_ocf(opcode); | |
1151 | ||
1152 | if (((ogf > HCI_SFLT_MAX_OGF) || | |
3bb3c755 GP |
1153 | !hci_test_bit(ocf & HCI_FLT_OCF_BITS, |
1154 | &hci_sec_filter.ocf_mask[ogf])) && | |
1155 | !capable(CAP_NET_RAW)) { | |
1da177e4 LT |
1156 | err = -EPERM; |
1157 | goto drop; | |
1158 | } | |
1159 | ||
fee746b0 | 1160 | if (ogf == 0x3f) { |
1da177e4 | 1161 | skb_queue_tail(&hdev->raw_q, skb); |
3eff45ea | 1162 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 | 1163 | } else { |
49c922bb | 1164 | /* Stand-alone HCI commands must be flagged as |
11714b3d JH |
1165 | * single-command requests. |
1166 | */ | |
db6e3e8d | 1167 | bt_cb(skb)->req.start = true; |
11714b3d | 1168 | |
1da177e4 | 1169 | skb_queue_tail(&hdev->cmd_q, skb); |
c347b765 | 1170 | queue_work(hdev->workqueue, &hdev->cmd_work); |
1da177e4 LT |
1171 | } |
1172 | } else { | |
1173 | if (!capable(CAP_NET_RAW)) { | |
1174 | err = -EPERM; | |
1175 | goto drop; | |
1176 | } | |
1177 | ||
1178 | skb_queue_tail(&hdev->raw_q, skb); | |
3eff45ea | 1179 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 LT |
1180 | } |
1181 | ||
1182 | err = len; | |
1183 | ||
1184 | done: | |
1185 | release_sock(sk); | |
1186 | return err; | |
1187 | ||
1188 | drop: | |
1189 | kfree_skb(skb); | |
1190 | goto done; | |
1191 | } | |
1192 | ||
8fc9ced3 GP |
1193 | static int hci_sock_setsockopt(struct socket *sock, int level, int optname, |
1194 | char __user *optval, unsigned int len) | |
1da177e4 LT |
1195 | { |
1196 | struct hci_ufilter uf = { .opcode = 0 }; | |
1197 | struct sock *sk = sock->sk; | |
1198 | int err = 0, opt = 0; | |
1199 | ||
1200 | BT_DBG("sk %p, opt %d", sk, optname); | |
1201 | ||
1202 | lock_sock(sk); | |
1203 | ||
2f39cdb7 | 1204 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { |
c2371e80 | 1205 | err = -EBADFD; |
2f39cdb7 MH |
1206 | goto done; |
1207 | } | |
1208 | ||
1da177e4 LT |
1209 | switch (optname) { |
1210 | case HCI_DATA_DIR: | |
1211 | if (get_user(opt, (int __user *)optval)) { | |
1212 | err = -EFAULT; | |
1213 | break; | |
1214 | } | |
1215 | ||
1216 | if (opt) | |
1217 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR; | |
1218 | else | |
1219 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR; | |
1220 | break; | |
1221 | ||
1222 | case HCI_TIME_STAMP: | |
1223 | if (get_user(opt, (int __user *)optval)) { | |
1224 | err = -EFAULT; | |
1225 | break; | |
1226 | } | |
1227 | ||
1228 | if (opt) | |
1229 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP; | |
1230 | else | |
1231 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP; | |
1232 | break; | |
1233 | ||
1234 | case HCI_FILTER: | |
0878b666 MH |
1235 | { |
1236 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1237 | ||
1238 | uf.type_mask = f->type_mask; | |
1239 | uf.opcode = f->opcode; | |
1240 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
1241 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
1242 | } | |
1243 | ||
1da177e4 LT |
1244 | len = min_t(unsigned int, len, sizeof(uf)); |
1245 | if (copy_from_user(&uf, optval, len)) { | |
1246 | err = -EFAULT; | |
1247 | break; | |
1248 | } | |
1249 | ||
1250 | if (!capable(CAP_NET_RAW)) { | |
1251 | uf.type_mask &= hci_sec_filter.type_mask; | |
1252 | uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0); | |
1253 | uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1); | |
1254 | } | |
1255 | ||
1256 | { | |
1257 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1258 | ||
1259 | f->type_mask = uf.type_mask; | |
1260 | f->opcode = uf.opcode; | |
1261 | *((u32 *) f->event_mask + 0) = uf.event_mask[0]; | |
1262 | *((u32 *) f->event_mask + 1) = uf.event_mask[1]; | |
1263 | } | |
8e87d142 | 1264 | break; |
1da177e4 LT |
1265 | |
1266 | default: | |
1267 | err = -ENOPROTOOPT; | |
1268 | break; | |
1269 | } | |
1270 | ||
2f39cdb7 | 1271 | done: |
1da177e4 LT |
1272 | release_sock(sk); |
1273 | return err; | |
1274 | } | |
1275 | ||
8fc9ced3 GP |
1276 | static int hci_sock_getsockopt(struct socket *sock, int level, int optname, |
1277 | char __user *optval, int __user *optlen) | |
1da177e4 LT |
1278 | { |
1279 | struct hci_ufilter uf; | |
1280 | struct sock *sk = sock->sk; | |
cedc5469 MH |
1281 | int len, opt, err = 0; |
1282 | ||
1283 | BT_DBG("sk %p, opt %d", sk, optname); | |
1da177e4 LT |
1284 | |
1285 | if (get_user(len, optlen)) | |
1286 | return -EFAULT; | |
1287 | ||
cedc5469 MH |
1288 | lock_sock(sk); |
1289 | ||
1290 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { | |
c2371e80 | 1291 | err = -EBADFD; |
cedc5469 MH |
1292 | goto done; |
1293 | } | |
1294 | ||
1da177e4 LT |
1295 | switch (optname) { |
1296 | case HCI_DATA_DIR: | |
1297 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR) | |
1298 | opt = 1; | |
8e87d142 | 1299 | else |
1da177e4 LT |
1300 | opt = 0; |
1301 | ||
1302 | if (put_user(opt, optval)) | |
cedc5469 | 1303 | err = -EFAULT; |
1da177e4 LT |
1304 | break; |
1305 | ||
1306 | case HCI_TIME_STAMP: | |
1307 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP) | |
1308 | opt = 1; | |
8e87d142 | 1309 | else |
1da177e4 LT |
1310 | opt = 0; |
1311 | ||
1312 | if (put_user(opt, optval)) | |
cedc5469 | 1313 | err = -EFAULT; |
1da177e4 LT |
1314 | break; |
1315 | ||
1316 | case HCI_FILTER: | |
1317 | { | |
1318 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1319 | ||
e15ca9a0 | 1320 | memset(&uf, 0, sizeof(uf)); |
1da177e4 LT |
1321 | uf.type_mask = f->type_mask; |
1322 | uf.opcode = f->opcode; | |
1323 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
1324 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
1325 | } | |
1326 | ||
1327 | len = min_t(unsigned int, len, sizeof(uf)); | |
1328 | if (copy_to_user(optval, &uf, len)) | |
cedc5469 | 1329 | err = -EFAULT; |
1da177e4 LT |
1330 | break; |
1331 | ||
1332 | default: | |
cedc5469 | 1333 | err = -ENOPROTOOPT; |
1da177e4 LT |
1334 | break; |
1335 | } | |
1336 | ||
cedc5469 MH |
1337 | done: |
1338 | release_sock(sk); | |
1339 | return err; | |
1da177e4 LT |
1340 | } |
1341 | ||
90ddc4f0 | 1342 | static const struct proto_ops hci_sock_ops = { |
1da177e4 LT |
1343 | .family = PF_BLUETOOTH, |
1344 | .owner = THIS_MODULE, | |
1345 | .release = hci_sock_release, | |
1346 | .bind = hci_sock_bind, | |
1347 | .getname = hci_sock_getname, | |
1348 | .sendmsg = hci_sock_sendmsg, | |
1349 | .recvmsg = hci_sock_recvmsg, | |
1350 | .ioctl = hci_sock_ioctl, | |
1351 | .poll = datagram_poll, | |
1352 | .listen = sock_no_listen, | |
1353 | .shutdown = sock_no_shutdown, | |
1354 | .setsockopt = hci_sock_setsockopt, | |
1355 | .getsockopt = hci_sock_getsockopt, | |
1356 | .connect = sock_no_connect, | |
1357 | .socketpair = sock_no_socketpair, | |
1358 | .accept = sock_no_accept, | |
1359 | .mmap = sock_no_mmap | |
1360 | }; | |
1361 | ||
1362 | static struct proto hci_sk_proto = { | |
1363 | .name = "HCI", | |
1364 | .owner = THIS_MODULE, | |
1365 | .obj_size = sizeof(struct hci_pinfo) | |
1366 | }; | |
1367 | ||
3f378b68 EP |
1368 | static int hci_sock_create(struct net *net, struct socket *sock, int protocol, |
1369 | int kern) | |
1da177e4 LT |
1370 | { |
1371 | struct sock *sk; | |
1372 | ||
1373 | BT_DBG("sock %p", sock); | |
1374 | ||
1375 | if (sock->type != SOCK_RAW) | |
1376 | return -ESOCKTNOSUPPORT; | |
1377 | ||
1378 | sock->ops = &hci_sock_ops; | |
1379 | ||
6257ff21 | 1380 | sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto); |
1da177e4 LT |
1381 | if (!sk) |
1382 | return -ENOMEM; | |
1383 | ||
1384 | sock_init_data(sock, sk); | |
1385 | ||
1386 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1387 | ||
1388 | sk->sk_protocol = protocol; | |
1389 | ||
1390 | sock->state = SS_UNCONNECTED; | |
1391 | sk->sk_state = BT_OPEN; | |
1392 | ||
1393 | bt_sock_link(&hci_sk_list, sk); | |
1394 | return 0; | |
1395 | } | |
1396 | ||
ec1b4cf7 | 1397 | static const struct net_proto_family hci_sock_family_ops = { |
1da177e4 LT |
1398 | .family = PF_BLUETOOTH, |
1399 | .owner = THIS_MODULE, | |
1400 | .create = hci_sock_create, | |
1401 | }; | |
1402 | ||
1da177e4 LT |
1403 | int __init hci_sock_init(void) |
1404 | { | |
1405 | int err; | |
1406 | ||
b0a8e282 MH |
1407 | BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr)); |
1408 | ||
1da177e4 LT |
1409 | err = proto_register(&hci_sk_proto, 0); |
1410 | if (err < 0) | |
1411 | return err; | |
1412 | ||
1413 | err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops); | |
f7c86637 MY |
1414 | if (err < 0) { |
1415 | BT_ERR("HCI socket registration failed"); | |
1da177e4 | 1416 | goto error; |
f7c86637 MY |
1417 | } |
1418 | ||
b0316615 | 1419 | err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL); |
f7c86637 MY |
1420 | if (err < 0) { |
1421 | BT_ERR("Failed to create HCI proc file"); | |
1422 | bt_sock_unregister(BTPROTO_HCI); | |
1423 | goto error; | |
1424 | } | |
1da177e4 | 1425 | |
1da177e4 LT |
1426 | BT_INFO("HCI socket layer initialized"); |
1427 | ||
1428 | return 0; | |
1429 | ||
1430 | error: | |
1da177e4 LT |
1431 | proto_unregister(&hci_sk_proto); |
1432 | return err; | |
1433 | } | |
1434 | ||
b7440a14 | 1435 | void hci_sock_cleanup(void) |
1da177e4 | 1436 | { |
f7c86637 | 1437 | bt_procfs_cleanup(&init_net, "hci"); |
5e9d7f86 | 1438 | bt_sock_unregister(BTPROTO_HCI); |
1da177e4 | 1439 | proto_unregister(&hci_sk_proto); |
1da177e4 | 1440 | } |