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> |
787b306c | 28 | #include <linux/utsname.h> |
70ecce91 | 29 | #include <linux/sched.h> |
1da177e4 LT |
30 | #include <asm/unaligned.h> |
31 | ||
32 | #include <net/bluetooth/bluetooth.h> | |
33 | #include <net/bluetooth/hci_core.h> | |
cd82e61c | 34 | #include <net/bluetooth/hci_mon.h> |
fa4335d7 JH |
35 | #include <net/bluetooth/mgmt.h> |
36 | ||
37 | #include "mgmt_util.h" | |
1da177e4 | 38 | |
801c1e8d JH |
39 | static LIST_HEAD(mgmt_chan_list); |
40 | static DEFINE_MUTEX(mgmt_chan_list_lock); | |
41 | ||
70ecce91 MH |
42 | static DEFINE_IDA(sock_cookie_ida); |
43 | ||
cd82e61c MH |
44 | static atomic_t monitor_promisc = ATOMIC_INIT(0); |
45 | ||
1da177e4 LT |
46 | /* ----- HCI socket interface ----- */ |
47 | ||
863def58 MH |
48 | /* Socket info */ |
49 | #define hci_pi(sk) ((struct hci_pinfo *) sk) | |
50 | ||
51 | struct hci_pinfo { | |
52 | struct bt_sock bt; | |
53 | struct hci_dev *hdev; | |
54 | struct hci_filter filter; | |
55 | __u32 cmsg_mask; | |
56 | unsigned short channel; | |
6befc644 | 57 | unsigned long flags; |
70ecce91 MH |
58 | __u32 cookie; |
59 | char comm[TASK_COMM_LEN]; | |
863def58 MH |
60 | }; |
61 | ||
6befc644 MH |
62 | void hci_sock_set_flag(struct sock *sk, int nr) |
63 | { | |
64 | set_bit(nr, &hci_pi(sk)->flags); | |
65 | } | |
66 | ||
67 | void hci_sock_clear_flag(struct sock *sk, int nr) | |
68 | { | |
69 | clear_bit(nr, &hci_pi(sk)->flags); | |
70 | } | |
71 | ||
c85be545 MH |
72 | int hci_sock_test_flag(struct sock *sk, int nr) |
73 | { | |
74 | return test_bit(nr, &hci_pi(sk)->flags); | |
75 | } | |
76 | ||
d0f172b1 JH |
77 | unsigned short hci_sock_get_channel(struct sock *sk) |
78 | { | |
79 | return hci_pi(sk)->channel; | |
80 | } | |
81 | ||
70ecce91 MH |
82 | u32 hci_sock_get_cookie(struct sock *sk) |
83 | { | |
84 | return hci_pi(sk)->cookie; | |
85 | } | |
86 | ||
df1cb87a MH |
87 | static bool hci_sock_gen_cookie(struct sock *sk) |
88 | { | |
89 | int id = hci_pi(sk)->cookie; | |
90 | ||
91 | if (!id) { | |
92 | id = ida_simple_get(&sock_cookie_ida, 1, 0, GFP_KERNEL); | |
93 | if (id < 0) | |
94 | id = 0xffffffff; | |
95 | ||
96 | hci_pi(sk)->cookie = id; | |
97 | get_task_comm(hci_pi(sk)->comm, current); | |
98 | return true; | |
99 | } | |
100 | ||
101 | return false; | |
102 | } | |
103 | ||
104 | static void hci_sock_free_cookie(struct sock *sk) | |
105 | { | |
106 | int id = hci_pi(sk)->cookie; | |
107 | ||
108 | if (id) { | |
109 | hci_pi(sk)->cookie = 0xffffffff; | |
110 | ida_simple_remove(&sock_cookie_ida, id); | |
111 | } | |
112 | } | |
113 | ||
9391976a | 114 | static inline int hci_test_bit(int nr, const void *addr) |
1da177e4 | 115 | { |
9391976a | 116 | return *((const __u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31)); |
1da177e4 LT |
117 | } |
118 | ||
119 | /* Security filter */ | |
3ad254f7 MH |
120 | #define HCI_SFLT_MAX_OGF 5 |
121 | ||
122 | struct hci_sec_filter { | |
123 | __u32 type_mask; | |
124 | __u32 event_mask[2]; | |
125 | __u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4]; | |
126 | }; | |
127 | ||
7e67c112 | 128 | static const struct hci_sec_filter hci_sec_filter = { |
1da177e4 LT |
129 | /* Packet types */ |
130 | 0x10, | |
131 | /* Events */ | |
dd7f5527 | 132 | { 0x1000d9fe, 0x0000b00c }, |
1da177e4 LT |
133 | /* Commands */ |
134 | { | |
135 | { 0x0 }, | |
136 | /* OGF_LINK_CTL */ | |
7c631a67 | 137 | { 0xbe000006, 0x00000001, 0x00000000, 0x00 }, |
1da177e4 | 138 | /* OGF_LINK_POLICY */ |
7c631a67 | 139 | { 0x00005200, 0x00000000, 0x00000000, 0x00 }, |
1da177e4 | 140 | /* OGF_HOST_CTL */ |
7c631a67 | 141 | { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 }, |
1da177e4 | 142 | /* OGF_INFO_PARAM */ |
7c631a67 | 143 | { 0x000002be, 0x00000000, 0x00000000, 0x00 }, |
1da177e4 | 144 | /* OGF_STATUS_PARAM */ |
7c631a67 | 145 | { 0x000000ea, 0x00000000, 0x00000000, 0x00 } |
1da177e4 LT |
146 | } |
147 | }; | |
148 | ||
149 | static struct bt_sock_list hci_sk_list = { | |
d5fb2962 | 150 | .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock) |
1da177e4 LT |
151 | }; |
152 | ||
f81fe64f MH |
153 | static bool is_filtered_packet(struct sock *sk, struct sk_buff *skb) |
154 | { | |
155 | struct hci_filter *flt; | |
156 | int flt_type, flt_event; | |
157 | ||
158 | /* Apply filter */ | |
159 | flt = &hci_pi(sk)->filter; | |
160 | ||
d79f34e3 | 161 | flt_type = hci_skb_pkt_type(skb) & HCI_FLT_TYPE_BITS; |
f81fe64f MH |
162 | |
163 | if (!test_bit(flt_type, &flt->type_mask)) | |
164 | return true; | |
165 | ||
166 | /* Extra filter for event packets only */ | |
d79f34e3 | 167 | if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT) |
f81fe64f MH |
168 | return false; |
169 | ||
170 | flt_event = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS); | |
171 | ||
172 | if (!hci_test_bit(flt_event, &flt->event_mask)) | |
173 | return true; | |
174 | ||
175 | /* Check filter only when opcode is set */ | |
176 | if (!flt->opcode) | |
177 | return false; | |
178 | ||
179 | if (flt_event == HCI_EV_CMD_COMPLETE && | |
180 | flt->opcode != get_unaligned((__le16 *)(skb->data + 3))) | |
181 | return true; | |
182 | ||
183 | if (flt_event == HCI_EV_CMD_STATUS && | |
184 | flt->opcode != get_unaligned((__le16 *)(skb->data + 4))) | |
185 | return true; | |
186 | ||
187 | return false; | |
188 | } | |
189 | ||
1da177e4 | 190 | /* Send frame to RAW socket */ |
470fe1b5 | 191 | void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 LT |
192 | { |
193 | struct sock *sk; | |
e0edf373 | 194 | struct sk_buff *skb_copy = NULL; |
1da177e4 LT |
195 | |
196 | BT_DBG("hdev %p len %d", hdev, skb->len); | |
197 | ||
198 | read_lock(&hci_sk_list.lock); | |
470fe1b5 | 199 | |
b67bfe0d | 200 | sk_for_each(sk, &hci_sk_list.head) { |
1da177e4 LT |
201 | struct sk_buff *nskb; |
202 | ||
203 | if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev) | |
204 | continue; | |
205 | ||
206 | /* Don't send frame to the socket it came from */ | |
207 | if (skb->sk == sk) | |
208 | continue; | |
209 | ||
23500189 | 210 | if (hci_pi(sk)->channel == HCI_CHANNEL_RAW) { |
d79f34e3 MH |
211 | if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT && |
212 | hci_skb_pkt_type(skb) != HCI_EVENT_PKT && | |
213 | hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT && | |
214 | hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) | |
bb77543e | 215 | continue; |
23500189 MH |
216 | if (is_filtered_packet(sk, skb)) |
217 | continue; | |
218 | } else if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { | |
219 | if (!bt_cb(skb)->incoming) | |
220 | continue; | |
d79f34e3 MH |
221 | if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT && |
222 | hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT && | |
223 | hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) | |
23500189 MH |
224 | continue; |
225 | } else { | |
226 | /* Don't send frame to other channel types */ | |
1da177e4 | 227 | continue; |
23500189 | 228 | } |
1da177e4 | 229 | |
e0edf373 MH |
230 | if (!skb_copy) { |
231 | /* Create a private copy with headroom */ | |
bad93e9d | 232 | skb_copy = __pskb_copy_fclone(skb, 1, GFP_ATOMIC, true); |
e0edf373 MH |
233 | if (!skb_copy) |
234 | continue; | |
235 | ||
236 | /* Put type byte before the data */ | |
d79f34e3 | 237 | memcpy(skb_push(skb_copy, 1), &hci_skb_pkt_type(skb), 1); |
e0edf373 MH |
238 | } |
239 | ||
240 | nskb = skb_clone(skb_copy, GFP_ATOMIC); | |
70f23020 | 241 | if (!nskb) |
1da177e4 LT |
242 | continue; |
243 | ||
470fe1b5 MH |
244 | if (sock_queue_rcv_skb(sk, nskb)) |
245 | kfree_skb(nskb); | |
246 | } | |
247 | ||
248 | read_unlock(&hci_sk_list.lock); | |
e0edf373 MH |
249 | |
250 | kfree_skb(skb_copy); | |
470fe1b5 MH |
251 | } |
252 | ||
7129069e JH |
253 | /* Send frame to sockets with specific channel */ |
254 | void hci_send_to_channel(unsigned short channel, struct sk_buff *skb, | |
c08b1a1d | 255 | int flag, struct sock *skip_sk) |
470fe1b5 MH |
256 | { |
257 | struct sock *sk; | |
470fe1b5 | 258 | |
7129069e | 259 | BT_DBG("channel %u len %d", channel, skb->len); |
470fe1b5 MH |
260 | |
261 | read_lock(&hci_sk_list.lock); | |
262 | ||
b67bfe0d | 263 | sk_for_each(sk, &hci_sk_list.head) { |
470fe1b5 MH |
264 | struct sk_buff *nskb; |
265 | ||
c08b1a1d | 266 | /* Ignore socket without the flag set */ |
c85be545 | 267 | if (!hci_sock_test_flag(sk, flag)) |
d7f72f61 MH |
268 | continue; |
269 | ||
c08b1a1d MH |
270 | /* Skip the original socket */ |
271 | if (sk == skip_sk) | |
17711c62 MH |
272 | continue; |
273 | ||
274 | if (sk->sk_state != BT_BOUND) | |
275 | continue; | |
276 | ||
277 | if (hci_pi(sk)->channel != channel) | |
278 | continue; | |
279 | ||
280 | nskb = skb_clone(skb, GFP_ATOMIC); | |
281 | if (!nskb) | |
282 | continue; | |
283 | ||
284 | if (sock_queue_rcv_skb(sk, nskb)) | |
285 | kfree_skb(nskb); | |
286 | } | |
287 | ||
288 | read_unlock(&hci_sk_list.lock); | |
289 | } | |
290 | ||
cd82e61c MH |
291 | /* Send frame to monitor socket */ |
292 | void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb) | |
293 | { | |
cd82e61c | 294 | struct sk_buff *skb_copy = NULL; |
2b531294 | 295 | struct hci_mon_hdr *hdr; |
cd82e61c MH |
296 | __le16 opcode; |
297 | ||
298 | if (!atomic_read(&monitor_promisc)) | |
299 | return; | |
300 | ||
301 | BT_DBG("hdev %p len %d", hdev, skb->len); | |
302 | ||
d79f34e3 | 303 | switch (hci_skb_pkt_type(skb)) { |
cd82e61c | 304 | case HCI_COMMAND_PKT: |
dcf4adbf | 305 | opcode = cpu_to_le16(HCI_MON_COMMAND_PKT); |
cd82e61c MH |
306 | break; |
307 | case HCI_EVENT_PKT: | |
dcf4adbf | 308 | opcode = cpu_to_le16(HCI_MON_EVENT_PKT); |
cd82e61c MH |
309 | break; |
310 | case HCI_ACLDATA_PKT: | |
311 | if (bt_cb(skb)->incoming) | |
dcf4adbf | 312 | opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT); |
cd82e61c | 313 | else |
dcf4adbf | 314 | opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT); |
cd82e61c MH |
315 | break; |
316 | case HCI_SCODATA_PKT: | |
317 | if (bt_cb(skb)->incoming) | |
dcf4adbf | 318 | opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT); |
cd82e61c | 319 | else |
dcf4adbf | 320 | opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT); |
cd82e61c | 321 | break; |
e875ff84 MH |
322 | case HCI_DIAG_PKT: |
323 | opcode = cpu_to_le16(HCI_MON_VENDOR_DIAG); | |
324 | break; | |
cd82e61c MH |
325 | default: |
326 | return; | |
327 | } | |
328 | ||
2b531294 MH |
329 | /* Create a private copy with headroom */ |
330 | skb_copy = __pskb_copy_fclone(skb, HCI_MON_HDR_SIZE, GFP_ATOMIC, true); | |
331 | if (!skb_copy) | |
332 | return; | |
333 | ||
334 | /* Put header before the data */ | |
8528d3f7 | 335 | hdr = (void *)skb_push(skb_copy, HCI_MON_HDR_SIZE); |
2b531294 MH |
336 | hdr->opcode = opcode; |
337 | hdr->index = cpu_to_le16(hdev->id); | |
338 | hdr->len = cpu_to_le16(skb->len); | |
339 | ||
c08b1a1d MH |
340 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb_copy, |
341 | HCI_SOCK_TRUSTED, NULL); | |
cd82e61c MH |
342 | kfree_skb(skb_copy); |
343 | } | |
344 | ||
38ceaa00 MH |
345 | void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event, |
346 | void *data, u16 data_len, ktime_t tstamp, | |
347 | int flag, struct sock *skip_sk) | |
348 | { | |
349 | struct sock *sk; | |
350 | __le16 index; | |
351 | ||
352 | if (hdev) | |
353 | index = cpu_to_le16(hdev->id); | |
354 | else | |
355 | index = cpu_to_le16(MGMT_INDEX_NONE); | |
356 | ||
357 | read_lock(&hci_sk_list.lock); | |
358 | ||
359 | sk_for_each(sk, &hci_sk_list.head) { | |
360 | struct hci_mon_hdr *hdr; | |
361 | struct sk_buff *skb; | |
362 | ||
363 | if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL) | |
364 | continue; | |
365 | ||
366 | /* Ignore socket without the flag set */ | |
367 | if (!hci_sock_test_flag(sk, flag)) | |
368 | continue; | |
369 | ||
370 | /* Skip the original socket */ | |
371 | if (sk == skip_sk) | |
372 | continue; | |
373 | ||
374 | skb = bt_skb_alloc(6 + data_len, GFP_ATOMIC); | |
375 | if (!skb) | |
376 | continue; | |
377 | ||
378 | put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4)); | |
379 | put_unaligned_le16(event, skb_put(skb, 2)); | |
380 | ||
381 | if (data) | |
382 | memcpy(skb_put(skb, data_len), data, data_len); | |
383 | ||
384 | skb->tstamp = tstamp; | |
385 | ||
386 | hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE); | |
387 | hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT); | |
388 | hdr->index = index; | |
389 | hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); | |
390 | ||
391 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, | |
392 | HCI_SOCK_TRUSTED, NULL); | |
393 | kfree_skb(skb); | |
394 | } | |
395 | ||
396 | read_unlock(&hci_sk_list.lock); | |
397 | } | |
398 | ||
cd82e61c MH |
399 | static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event) |
400 | { | |
401 | struct hci_mon_hdr *hdr; | |
402 | struct hci_mon_new_index *ni; | |
6c566dd5 | 403 | struct hci_mon_index_info *ii; |
cd82e61c MH |
404 | struct sk_buff *skb; |
405 | __le16 opcode; | |
406 | ||
407 | switch (event) { | |
408 | case HCI_DEV_REG: | |
409 | skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC); | |
410 | if (!skb) | |
411 | return NULL; | |
412 | ||
6c566dd5 | 413 | ni = (void *)skb_put(skb, HCI_MON_NEW_INDEX_SIZE); |
cd82e61c MH |
414 | ni->type = hdev->dev_type; |
415 | ni->bus = hdev->bus; | |
416 | bacpy(&ni->bdaddr, &hdev->bdaddr); | |
417 | memcpy(ni->name, hdev->name, 8); | |
418 | ||
dcf4adbf | 419 | opcode = cpu_to_le16(HCI_MON_NEW_INDEX); |
cd82e61c MH |
420 | break; |
421 | ||
422 | case HCI_DEV_UNREG: | |
423 | skb = bt_skb_alloc(0, GFP_ATOMIC); | |
424 | if (!skb) | |
425 | return NULL; | |
426 | ||
dcf4adbf | 427 | opcode = cpu_to_le16(HCI_MON_DEL_INDEX); |
cd82e61c MH |
428 | break; |
429 | ||
e131d74a MH |
430 | case HCI_DEV_SETUP: |
431 | if (hdev->manufacturer == 0xffff) | |
432 | return NULL; | |
433 | ||
434 | /* fall through */ | |
435 | ||
6c566dd5 MH |
436 | case HCI_DEV_UP: |
437 | skb = bt_skb_alloc(HCI_MON_INDEX_INFO_SIZE, GFP_ATOMIC); | |
438 | if (!skb) | |
439 | return NULL; | |
440 | ||
441 | ii = (void *)skb_put(skb, HCI_MON_INDEX_INFO_SIZE); | |
442 | bacpy(&ii->bdaddr, &hdev->bdaddr); | |
443 | ii->manufacturer = cpu_to_le16(hdev->manufacturer); | |
444 | ||
445 | opcode = cpu_to_le16(HCI_MON_INDEX_INFO); | |
446 | break; | |
447 | ||
22db3cbc MH |
448 | case HCI_DEV_OPEN: |
449 | skb = bt_skb_alloc(0, GFP_ATOMIC); | |
450 | if (!skb) | |
451 | return NULL; | |
452 | ||
453 | opcode = cpu_to_le16(HCI_MON_OPEN_INDEX); | |
454 | break; | |
455 | ||
456 | case HCI_DEV_CLOSE: | |
457 | skb = bt_skb_alloc(0, GFP_ATOMIC); | |
458 | if (!skb) | |
459 | return NULL; | |
460 | ||
461 | opcode = cpu_to_le16(HCI_MON_CLOSE_INDEX); | |
462 | break; | |
463 | ||
cd82e61c MH |
464 | default: |
465 | return NULL; | |
466 | } | |
467 | ||
468 | __net_timestamp(skb); | |
469 | ||
8528d3f7 | 470 | hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE); |
cd82e61c MH |
471 | hdr->opcode = opcode; |
472 | hdr->index = cpu_to_le16(hdev->id); | |
473 | hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); | |
474 | ||
475 | return skb; | |
476 | } | |
477 | ||
249fa169 MH |
478 | static struct sk_buff *create_monitor_ctrl_open(struct sock *sk) |
479 | { | |
480 | struct hci_mon_hdr *hdr; | |
481 | struct sk_buff *skb; | |
d0bef1d2 | 482 | u16 format; |
249fa169 MH |
483 | u8 ver[3]; |
484 | u32 flags; | |
485 | ||
0ef2c42f MH |
486 | /* No message needed when cookie is not present */ |
487 | if (!hci_pi(sk)->cookie) | |
488 | return NULL; | |
489 | ||
d0bef1d2 | 490 | switch (hci_pi(sk)->channel) { |
f81f5b2d MH |
491 | case HCI_CHANNEL_RAW: |
492 | format = 0x0000; | |
493 | ver[0] = BT_SUBSYS_VERSION; | |
494 | put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1); | |
495 | break; | |
aa1638dd MH |
496 | case HCI_CHANNEL_USER: |
497 | format = 0x0001; | |
498 | ver[0] = BT_SUBSYS_VERSION; | |
499 | put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1); | |
500 | break; | |
d0bef1d2 MH |
501 | case HCI_CHANNEL_CONTROL: |
502 | format = 0x0002; | |
503 | mgmt_fill_version_info(ver); | |
504 | break; | |
505 | default: | |
506 | /* No message for unsupported format */ | |
507 | return NULL; | |
508 | } | |
509 | ||
249fa169 MH |
510 | skb = bt_skb_alloc(14 + TASK_COMM_LEN , GFP_ATOMIC); |
511 | if (!skb) | |
512 | return NULL; | |
513 | ||
249fa169 MH |
514 | flags = hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) ? 0x1 : 0x0; |
515 | ||
516 | put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4)); | |
517 | put_unaligned_le16(format, skb_put(skb, 2)); | |
518 | memcpy(skb_put(skb, sizeof(ver)), ver, sizeof(ver)); | |
519 | put_unaligned_le32(flags, skb_put(skb, 4)); | |
520 | *skb_put(skb, 1) = TASK_COMM_LEN; | |
521 | memcpy(skb_put(skb, TASK_COMM_LEN), hci_pi(sk)->comm, TASK_COMM_LEN); | |
522 | ||
523 | __net_timestamp(skb); | |
524 | ||
525 | hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE); | |
526 | hdr->opcode = cpu_to_le16(HCI_MON_CTRL_OPEN); | |
0ef2c42f MH |
527 | if (hci_pi(sk)->hdev) |
528 | hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id); | |
529 | else | |
530 | hdr->index = cpu_to_le16(HCI_DEV_NONE); | |
249fa169 MH |
531 | hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); |
532 | ||
533 | return skb; | |
534 | } | |
535 | ||
536 | static struct sk_buff *create_monitor_ctrl_close(struct sock *sk) | |
537 | { | |
538 | struct hci_mon_hdr *hdr; | |
539 | struct sk_buff *skb; | |
540 | ||
0ef2c42f MH |
541 | /* No message needed when cookie is not present */ |
542 | if (!hci_pi(sk)->cookie) | |
543 | return NULL; | |
544 | ||
d0bef1d2 | 545 | switch (hci_pi(sk)->channel) { |
f81f5b2d | 546 | case HCI_CHANNEL_RAW: |
aa1638dd | 547 | case HCI_CHANNEL_USER: |
d0bef1d2 MH |
548 | case HCI_CHANNEL_CONTROL: |
549 | break; | |
550 | default: | |
551 | /* No message for unsupported format */ | |
552 | return NULL; | |
553 | } | |
554 | ||
249fa169 MH |
555 | skb = bt_skb_alloc(4, GFP_ATOMIC); |
556 | if (!skb) | |
557 | return NULL; | |
558 | ||
559 | put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4)); | |
560 | ||
561 | __net_timestamp(skb); | |
562 | ||
563 | hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE); | |
564 | hdr->opcode = cpu_to_le16(HCI_MON_CTRL_CLOSE); | |
0ef2c42f MH |
565 | if (hci_pi(sk)->hdev) |
566 | hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id); | |
567 | else | |
568 | hdr->index = cpu_to_le16(HCI_DEV_NONE); | |
249fa169 MH |
569 | hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); |
570 | ||
571 | return skb; | |
572 | } | |
573 | ||
38ceaa00 MH |
574 | static struct sk_buff *create_monitor_ctrl_command(struct sock *sk, u16 index, |
575 | u16 opcode, u16 len, | |
576 | const void *buf) | |
577 | { | |
578 | struct hci_mon_hdr *hdr; | |
579 | struct sk_buff *skb; | |
580 | ||
581 | skb = bt_skb_alloc(6 + len, GFP_ATOMIC); | |
582 | if (!skb) | |
583 | return NULL; | |
584 | ||
585 | put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4)); | |
586 | put_unaligned_le16(opcode, skb_put(skb, 2)); | |
587 | ||
588 | if (buf) | |
589 | memcpy(skb_put(skb, len), buf, len); | |
590 | ||
591 | __net_timestamp(skb); | |
592 | ||
593 | hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE); | |
594 | hdr->opcode = cpu_to_le16(HCI_MON_CTRL_COMMAND); | |
595 | hdr->index = cpu_to_le16(index); | |
596 | hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); | |
597 | ||
598 | return skb; | |
599 | } | |
600 | ||
787b306c JB |
601 | static void __printf(2, 3) |
602 | send_monitor_note(struct sock *sk, const char *fmt, ...) | |
dd31506d | 603 | { |
787b306c | 604 | size_t len; |
dd31506d MH |
605 | struct hci_mon_hdr *hdr; |
606 | struct sk_buff *skb; | |
787b306c JB |
607 | va_list args; |
608 | ||
609 | va_start(args, fmt); | |
610 | len = vsnprintf(NULL, 0, fmt, args); | |
611 | va_end(args); | |
dd31506d MH |
612 | |
613 | skb = bt_skb_alloc(len + 1, GFP_ATOMIC); | |
614 | if (!skb) | |
615 | return; | |
616 | ||
787b306c JB |
617 | va_start(args, fmt); |
618 | vsprintf(skb_put(skb, len), fmt, args); | |
619 | *skb_put(skb, 1) = 0; | |
620 | va_end(args); | |
dd31506d MH |
621 | |
622 | __net_timestamp(skb); | |
623 | ||
624 | hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE); | |
625 | hdr->opcode = cpu_to_le16(HCI_MON_SYSTEM_NOTE); | |
626 | hdr->index = cpu_to_le16(HCI_DEV_NONE); | |
627 | hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); | |
628 | ||
629 | if (sock_queue_rcv_skb(sk, skb)) | |
630 | kfree_skb(skb); | |
631 | } | |
632 | ||
cd82e61c MH |
633 | static void send_monitor_replay(struct sock *sk) |
634 | { | |
635 | struct hci_dev *hdev; | |
636 | ||
637 | read_lock(&hci_dev_list_lock); | |
638 | ||
639 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
640 | struct sk_buff *skb; | |
641 | ||
642 | skb = create_monitor_event(hdev, HCI_DEV_REG); | |
643 | if (!skb) | |
644 | continue; | |
645 | ||
646 | if (sock_queue_rcv_skb(sk, skb)) | |
647 | kfree_skb(skb); | |
22db3cbc MH |
648 | |
649 | if (!test_bit(HCI_RUNNING, &hdev->flags)) | |
650 | continue; | |
651 | ||
652 | skb = create_monitor_event(hdev, HCI_DEV_OPEN); | |
653 | if (!skb) | |
654 | continue; | |
655 | ||
656 | if (sock_queue_rcv_skb(sk, skb)) | |
657 | kfree_skb(skb); | |
6c566dd5 | 658 | |
e131d74a MH |
659 | if (test_bit(HCI_UP, &hdev->flags)) |
660 | skb = create_monitor_event(hdev, HCI_DEV_UP); | |
661 | else if (hci_dev_test_flag(hdev, HCI_SETUP)) | |
662 | skb = create_monitor_event(hdev, HCI_DEV_SETUP); | |
663 | else | |
664 | skb = NULL; | |
6c566dd5 | 665 | |
e131d74a MH |
666 | if (skb) { |
667 | if (sock_queue_rcv_skb(sk, skb)) | |
668 | kfree_skb(skb); | |
669 | } | |
cd82e61c MH |
670 | } |
671 | ||
672 | read_unlock(&hci_dev_list_lock); | |
673 | } | |
674 | ||
249fa169 MH |
675 | static void send_monitor_control_replay(struct sock *mon_sk) |
676 | { | |
677 | struct sock *sk; | |
678 | ||
679 | read_lock(&hci_sk_list.lock); | |
680 | ||
681 | sk_for_each(sk, &hci_sk_list.head) { | |
682 | struct sk_buff *skb; | |
683 | ||
249fa169 MH |
684 | skb = create_monitor_ctrl_open(sk); |
685 | if (!skb) | |
686 | continue; | |
687 | ||
688 | if (sock_queue_rcv_skb(mon_sk, skb)) | |
689 | kfree_skb(skb); | |
690 | } | |
691 | ||
692 | read_unlock(&hci_sk_list.lock); | |
693 | } | |
694 | ||
040030ef MH |
695 | /* Generate internal stack event */ |
696 | static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data) | |
697 | { | |
698 | struct hci_event_hdr *hdr; | |
699 | struct hci_ev_stack_internal *ev; | |
700 | struct sk_buff *skb; | |
701 | ||
702 | skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC); | |
703 | if (!skb) | |
704 | return; | |
705 | ||
8528d3f7 | 706 | hdr = (void *)skb_put(skb, HCI_EVENT_HDR_SIZE); |
040030ef MH |
707 | hdr->evt = HCI_EV_STACK_INTERNAL; |
708 | hdr->plen = sizeof(*ev) + dlen; | |
709 | ||
8528d3f7 | 710 | ev = (void *)skb_put(skb, sizeof(*ev) + dlen); |
040030ef MH |
711 | ev->type = type; |
712 | memcpy(ev->data, data, dlen); | |
713 | ||
714 | bt_cb(skb)->incoming = 1; | |
715 | __net_timestamp(skb); | |
716 | ||
d79f34e3 | 717 | hci_skb_pkt_type(skb) = HCI_EVENT_PKT; |
040030ef MH |
718 | hci_send_to_sock(hdev, skb); |
719 | kfree_skb(skb); | |
720 | } | |
721 | ||
722 | void hci_sock_dev_event(struct hci_dev *hdev, int event) | |
723 | { | |
040030ef MH |
724 | BT_DBG("hdev %s event %d", hdev->name, event); |
725 | ||
cd82e61c MH |
726 | if (atomic_read(&monitor_promisc)) { |
727 | struct sk_buff *skb; | |
728 | ||
ed1b28a4 | 729 | /* Send event to monitor */ |
cd82e61c MH |
730 | skb = create_monitor_event(hdev, event); |
731 | if (skb) { | |
c08b1a1d MH |
732 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, |
733 | HCI_SOCK_TRUSTED, NULL); | |
cd82e61c MH |
734 | kfree_skb(skb); |
735 | } | |
736 | } | |
737 | ||
ed1b28a4 MH |
738 | if (event <= HCI_DEV_DOWN) { |
739 | struct hci_ev_si_device ev; | |
740 | ||
741 | /* Send event to sockets */ | |
742 | ev.event = event; | |
743 | ev.dev_id = hdev->id; | |
744 | hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev); | |
745 | } | |
040030ef MH |
746 | |
747 | if (event == HCI_DEV_UNREG) { | |
748 | struct sock *sk; | |
040030ef MH |
749 | |
750 | /* Detach sockets from device */ | |
751 | read_lock(&hci_sk_list.lock); | |
b67bfe0d | 752 | sk_for_each(sk, &hci_sk_list.head) { |
040030ef MH |
753 | bh_lock_sock_nested(sk); |
754 | if (hci_pi(sk)->hdev == hdev) { | |
755 | hci_pi(sk)->hdev = NULL; | |
756 | sk->sk_err = EPIPE; | |
757 | sk->sk_state = BT_OPEN; | |
758 | sk->sk_state_change(sk); | |
759 | ||
760 | hci_dev_put(hdev); | |
761 | } | |
762 | bh_unlock_sock(sk); | |
763 | } | |
764 | read_unlock(&hci_sk_list.lock); | |
765 | } | |
766 | } | |
767 | ||
801c1e8d JH |
768 | static struct hci_mgmt_chan *__hci_mgmt_chan_find(unsigned short channel) |
769 | { | |
770 | struct hci_mgmt_chan *c; | |
771 | ||
772 | list_for_each_entry(c, &mgmt_chan_list, list) { | |
773 | if (c->channel == channel) | |
774 | return c; | |
775 | } | |
776 | ||
777 | return NULL; | |
778 | } | |
779 | ||
780 | static struct hci_mgmt_chan *hci_mgmt_chan_find(unsigned short channel) | |
781 | { | |
782 | struct hci_mgmt_chan *c; | |
783 | ||
784 | mutex_lock(&mgmt_chan_list_lock); | |
785 | c = __hci_mgmt_chan_find(channel); | |
786 | mutex_unlock(&mgmt_chan_list_lock); | |
787 | ||
788 | return c; | |
789 | } | |
790 | ||
791 | int hci_mgmt_chan_register(struct hci_mgmt_chan *c) | |
792 | { | |
793 | if (c->channel < HCI_CHANNEL_CONTROL) | |
794 | return -EINVAL; | |
795 | ||
796 | mutex_lock(&mgmt_chan_list_lock); | |
797 | if (__hci_mgmt_chan_find(c->channel)) { | |
798 | mutex_unlock(&mgmt_chan_list_lock); | |
799 | return -EALREADY; | |
800 | } | |
801 | ||
802 | list_add_tail(&c->list, &mgmt_chan_list); | |
803 | ||
804 | mutex_unlock(&mgmt_chan_list_lock); | |
805 | ||
806 | return 0; | |
807 | } | |
808 | EXPORT_SYMBOL(hci_mgmt_chan_register); | |
809 | ||
810 | void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c) | |
811 | { | |
812 | mutex_lock(&mgmt_chan_list_lock); | |
813 | list_del(&c->list); | |
814 | mutex_unlock(&mgmt_chan_list_lock); | |
815 | } | |
816 | EXPORT_SYMBOL(hci_mgmt_chan_unregister); | |
817 | ||
1da177e4 LT |
818 | static int hci_sock_release(struct socket *sock) |
819 | { | |
820 | struct sock *sk = sock->sk; | |
7b005bd3 | 821 | struct hci_dev *hdev; |
249fa169 | 822 | struct sk_buff *skb; |
1da177e4 LT |
823 | |
824 | BT_DBG("sock %p sk %p", sock, sk); | |
825 | ||
826 | if (!sk) | |
827 | return 0; | |
828 | ||
7b005bd3 MH |
829 | hdev = hci_pi(sk)->hdev; |
830 | ||
70ecce91 MH |
831 | switch (hci_pi(sk)->channel) { |
832 | case HCI_CHANNEL_MONITOR: | |
cd82e61c | 833 | atomic_dec(&monitor_promisc); |
70ecce91 | 834 | break; |
f81f5b2d | 835 | case HCI_CHANNEL_RAW: |
aa1638dd | 836 | case HCI_CHANNEL_USER: |
70ecce91 | 837 | case HCI_CHANNEL_CONTROL: |
249fa169 MH |
838 | /* Send event to monitor */ |
839 | skb = create_monitor_ctrl_close(sk); | |
840 | if (skb) { | |
841 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, | |
842 | HCI_SOCK_TRUSTED, NULL); | |
843 | kfree_skb(skb); | |
844 | } | |
845 | ||
df1cb87a | 846 | hci_sock_free_cookie(sk); |
70ecce91 MH |
847 | break; |
848 | } | |
cd82e61c | 849 | |
1da177e4 LT |
850 | bt_sock_unlink(&hci_sk_list, sk); |
851 | ||
852 | if (hdev) { | |
23500189 | 853 | if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { |
6b3cc1db SF |
854 | /* When releasing an user channel exclusive access, |
855 | * call hci_dev_do_close directly instead of calling | |
856 | * hci_dev_close to ensure the exclusive access will | |
857 | * be released and the controller brought back down. | |
858 | * | |
859 | * The checking of HCI_AUTO_OFF is not needed in this | |
860 | * case since it will have been cleared already when | |
861 | * opening the user channel. | |
862 | */ | |
863 | hci_dev_do_close(hdev); | |
9380f9ea LP |
864 | hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); |
865 | mgmt_index_added(hdev); | |
23500189 MH |
866 | } |
867 | ||
1da177e4 LT |
868 | atomic_dec(&hdev->promisc); |
869 | hci_dev_put(hdev); | |
870 | } | |
871 | ||
872 | sock_orphan(sk); | |
873 | ||
874 | skb_queue_purge(&sk->sk_receive_queue); | |
875 | skb_queue_purge(&sk->sk_write_queue); | |
876 | ||
877 | sock_put(sk); | |
878 | return 0; | |
879 | } | |
880 | ||
b2a66aad | 881 | static int hci_sock_blacklist_add(struct hci_dev *hdev, void __user *arg) |
f0358568 JH |
882 | { |
883 | bdaddr_t bdaddr; | |
5e762444 | 884 | int err; |
f0358568 JH |
885 | |
886 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
887 | return -EFAULT; | |
888 | ||
09fd0de5 | 889 | hci_dev_lock(hdev); |
5e762444 | 890 | |
dcc36c16 | 891 | err = hci_bdaddr_list_add(&hdev->blacklist, &bdaddr, BDADDR_BREDR); |
5e762444 | 892 | |
09fd0de5 | 893 | hci_dev_unlock(hdev); |
5e762444 AJ |
894 | |
895 | return err; | |
f0358568 JH |
896 | } |
897 | ||
b2a66aad | 898 | static int hci_sock_blacklist_del(struct hci_dev *hdev, void __user *arg) |
f0358568 JH |
899 | { |
900 | bdaddr_t bdaddr; | |
5e762444 | 901 | int err; |
f0358568 JH |
902 | |
903 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
904 | return -EFAULT; | |
905 | ||
09fd0de5 | 906 | hci_dev_lock(hdev); |
5e762444 | 907 | |
dcc36c16 | 908 | err = hci_bdaddr_list_del(&hdev->blacklist, &bdaddr, BDADDR_BREDR); |
5e762444 | 909 | |
09fd0de5 | 910 | hci_dev_unlock(hdev); |
5e762444 AJ |
911 | |
912 | return err; | |
f0358568 JH |
913 | } |
914 | ||
8e87d142 | 915 | /* Ioctls that require bound socket */ |
6039aa73 GP |
916 | static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, |
917 | unsigned long arg) | |
1da177e4 LT |
918 | { |
919 | struct hci_dev *hdev = hci_pi(sk)->hdev; | |
920 | ||
921 | if (!hdev) | |
922 | return -EBADFD; | |
923 | ||
d7a5a11d | 924 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) |
0736cfa8 MH |
925 | return -EBUSY; |
926 | ||
d7a5a11d | 927 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) |
fee746b0 MH |
928 | return -EOPNOTSUPP; |
929 | ||
ca8bee5d | 930 | if (hdev->dev_type != HCI_PRIMARY) |
5b69bef5 MH |
931 | return -EOPNOTSUPP; |
932 | ||
1da177e4 LT |
933 | switch (cmd) { |
934 | case HCISETRAW: | |
935 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 936 | return -EPERM; |
db596681 | 937 | return -EOPNOTSUPP; |
1da177e4 | 938 | |
1da177e4 | 939 | case HCIGETCONNINFO: |
8528d3f7 | 940 | return hci_get_conn_info(hdev, (void __user *)arg); |
40be492f MH |
941 | |
942 | case HCIGETAUTHINFO: | |
8528d3f7 | 943 | return hci_get_auth_info(hdev, (void __user *)arg); |
1da177e4 | 944 | |
f0358568 JH |
945 | case HCIBLOCKADDR: |
946 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 947 | return -EPERM; |
8528d3f7 | 948 | return hci_sock_blacklist_add(hdev, (void __user *)arg); |
f0358568 JH |
949 | |
950 | case HCIUNBLOCKADDR: | |
951 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 952 | return -EPERM; |
8528d3f7 | 953 | return hci_sock_blacklist_del(hdev, (void __user *)arg); |
1da177e4 | 954 | } |
0736cfa8 | 955 | |
324d36ed | 956 | return -ENOIOCTLCMD; |
1da177e4 LT |
957 | } |
958 | ||
8fc9ced3 GP |
959 | static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, |
960 | unsigned long arg) | |
1da177e4 | 961 | { |
8528d3f7 | 962 | void __user *argp = (void __user *)arg; |
0736cfa8 | 963 | struct sock *sk = sock->sk; |
1da177e4 LT |
964 | int err; |
965 | ||
966 | BT_DBG("cmd %x arg %lx", cmd, arg); | |
967 | ||
c1c4f956 MH |
968 | lock_sock(sk); |
969 | ||
970 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { | |
971 | err = -EBADFD; | |
972 | goto done; | |
973 | } | |
974 | ||
f81f5b2d MH |
975 | /* When calling an ioctl on an unbound raw socket, then ensure |
976 | * that the monitor gets informed. Ensure that the resulting event | |
977 | * is only send once by checking if the cookie exists or not. The | |
978 | * socket cookie will be only ever generated once for the lifetime | |
979 | * of a given socket. | |
980 | */ | |
981 | if (hci_sock_gen_cookie(sk)) { | |
982 | struct sk_buff *skb; | |
983 | ||
984 | if (capable(CAP_NET_ADMIN)) | |
985 | hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); | |
986 | ||
987 | /* Send event to monitor */ | |
988 | skb = create_monitor_ctrl_open(sk); | |
989 | if (skb) { | |
990 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, | |
991 | HCI_SOCK_TRUSTED, NULL); | |
992 | kfree_skb(skb); | |
993 | } | |
994 | } | |
995 | ||
c1c4f956 MH |
996 | release_sock(sk); |
997 | ||
1da177e4 LT |
998 | switch (cmd) { |
999 | case HCIGETDEVLIST: | |
1000 | return hci_get_dev_list(argp); | |
1001 | ||
1002 | case HCIGETDEVINFO: | |
1003 | return hci_get_dev_info(argp); | |
1004 | ||
1005 | case HCIGETCONNLIST: | |
1006 | return hci_get_conn_list(argp); | |
1007 | ||
1008 | case HCIDEVUP: | |
1009 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 1010 | return -EPERM; |
1da177e4 LT |
1011 | return hci_dev_open(arg); |
1012 | ||
1013 | case HCIDEVDOWN: | |
1014 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 1015 | return -EPERM; |
1da177e4 LT |
1016 | return hci_dev_close(arg); |
1017 | ||
1018 | case HCIDEVRESET: | |
1019 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 1020 | return -EPERM; |
1da177e4 LT |
1021 | return hci_dev_reset(arg); |
1022 | ||
1023 | case HCIDEVRESTAT: | |
1024 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 1025 | return -EPERM; |
1da177e4 LT |
1026 | return hci_dev_reset_stat(arg); |
1027 | ||
1028 | case HCISETSCAN: | |
1029 | case HCISETAUTH: | |
1030 | case HCISETENCRYPT: | |
1031 | case HCISETPTYPE: | |
1032 | case HCISETLINKPOL: | |
1033 | case HCISETLINKMODE: | |
1034 | case HCISETACLMTU: | |
1035 | case HCISETSCOMTU: | |
1036 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 1037 | return -EPERM; |
1da177e4 LT |
1038 | return hci_dev_cmd(cmd, argp); |
1039 | ||
1040 | case HCIINQUIRY: | |
1041 | return hci_inquiry(argp); | |
1da177e4 | 1042 | } |
c1c4f956 MH |
1043 | |
1044 | lock_sock(sk); | |
1045 | ||
1046 | err = hci_sock_bound_ioctl(sk, cmd, arg); | |
1047 | ||
1048 | done: | |
1049 | release_sock(sk); | |
1050 | return err; | |
1da177e4 LT |
1051 | } |
1052 | ||
8fc9ced3 GP |
1053 | static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, |
1054 | int addr_len) | |
1da177e4 | 1055 | { |
0381101f | 1056 | struct sockaddr_hci haddr; |
1da177e4 LT |
1057 | struct sock *sk = sock->sk; |
1058 | struct hci_dev *hdev = NULL; | |
f4cdbb3f | 1059 | struct sk_buff *skb; |
0381101f | 1060 | int len, err = 0; |
1da177e4 LT |
1061 | |
1062 | BT_DBG("sock %p sk %p", sock, sk); | |
1063 | ||
0381101f JH |
1064 | if (!addr) |
1065 | return -EINVAL; | |
1066 | ||
1067 | memset(&haddr, 0, sizeof(haddr)); | |
1068 | len = min_t(unsigned int, sizeof(haddr), addr_len); | |
1069 | memcpy(&haddr, addr, len); | |
1070 | ||
1071 | if (haddr.hci_family != AF_BLUETOOTH) | |
1072 | return -EINVAL; | |
1073 | ||
1da177e4 LT |
1074 | lock_sock(sk); |
1075 | ||
7cc2ade2 | 1076 | if (sk->sk_state == BT_BOUND) { |
1da177e4 LT |
1077 | err = -EALREADY; |
1078 | goto done; | |
1079 | } | |
1080 | ||
7cc2ade2 MH |
1081 | switch (haddr.hci_channel) { |
1082 | case HCI_CHANNEL_RAW: | |
1083 | if (hci_pi(sk)->hdev) { | |
1084 | err = -EALREADY; | |
1da177e4 LT |
1085 | goto done; |
1086 | } | |
1087 | ||
7cc2ade2 MH |
1088 | if (haddr.hci_dev != HCI_DEV_NONE) { |
1089 | hdev = hci_dev_get(haddr.hci_dev); | |
1090 | if (!hdev) { | |
1091 | err = -ENODEV; | |
1092 | goto done; | |
1093 | } | |
1094 | ||
1095 | atomic_inc(&hdev->promisc); | |
1096 | } | |
1097 | ||
5a6d2cf5 | 1098 | hci_pi(sk)->channel = haddr.hci_channel; |
f81f5b2d | 1099 | |
f4cdbb3f MH |
1100 | if (!hci_sock_gen_cookie(sk)) { |
1101 | /* In the case when a cookie has already been assigned, | |
1102 | * then there has been already an ioctl issued against | |
1103 | * an unbound socket and with that triggerd an open | |
1104 | * notification. Send a close notification first to | |
1105 | * allow the state transition to bounded. | |
1106 | */ | |
1107 | skb = create_monitor_ctrl_close(sk); | |
f81f5b2d MH |
1108 | if (skb) { |
1109 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, | |
1110 | HCI_SOCK_TRUSTED, NULL); | |
1111 | kfree_skb(skb); | |
1112 | } | |
1113 | } | |
f4cdbb3f MH |
1114 | |
1115 | if (capable(CAP_NET_ADMIN)) | |
1116 | hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); | |
1117 | ||
1118 | hci_pi(sk)->hdev = hdev; | |
1119 | ||
1120 | /* Send event to monitor */ | |
1121 | skb = create_monitor_ctrl_open(sk); | |
1122 | if (skb) { | |
1123 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, | |
1124 | HCI_SOCK_TRUSTED, NULL); | |
1125 | kfree_skb(skb); | |
1126 | } | |
7cc2ade2 MH |
1127 | break; |
1128 | ||
23500189 MH |
1129 | case HCI_CHANNEL_USER: |
1130 | if (hci_pi(sk)->hdev) { | |
1131 | err = -EALREADY; | |
1132 | goto done; | |
1133 | } | |
1134 | ||
1135 | if (haddr.hci_dev == HCI_DEV_NONE) { | |
1136 | err = -EINVAL; | |
1137 | goto done; | |
1138 | } | |
1139 | ||
10a8b86f | 1140 | if (!capable(CAP_NET_ADMIN)) { |
23500189 MH |
1141 | err = -EPERM; |
1142 | goto done; | |
1143 | } | |
1144 | ||
1145 | hdev = hci_dev_get(haddr.hci_dev); | |
1146 | if (!hdev) { | |
1147 | err = -ENODEV; | |
1148 | goto done; | |
1149 | } | |
1150 | ||
781f899f | 1151 | if (test_bit(HCI_INIT, &hdev->flags) || |
d7a5a11d | 1152 | hci_dev_test_flag(hdev, HCI_SETUP) || |
781f899f MH |
1153 | hci_dev_test_flag(hdev, HCI_CONFIG) || |
1154 | (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) && | |
1155 | test_bit(HCI_UP, &hdev->flags))) { | |
23500189 MH |
1156 | err = -EBUSY; |
1157 | hci_dev_put(hdev); | |
1158 | goto done; | |
1159 | } | |
1160 | ||
238be788 | 1161 | if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) { |
23500189 MH |
1162 | err = -EUSERS; |
1163 | hci_dev_put(hdev); | |
1164 | goto done; | |
1165 | } | |
1166 | ||
0602a8ad | 1167 | mgmt_index_removed(hdev); |
23500189 MH |
1168 | |
1169 | err = hci_dev_open(hdev->id); | |
1170 | if (err) { | |
781f899f MH |
1171 | if (err == -EALREADY) { |
1172 | /* In case the transport is already up and | |
1173 | * running, clear the error here. | |
1174 | * | |
1175 | * This can happen when opening an user | |
1176 | * channel and HCI_AUTO_OFF grace period | |
1177 | * is still active. | |
1178 | */ | |
1179 | err = 0; | |
1180 | } else { | |
1181 | hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); | |
1182 | mgmt_index_added(hdev); | |
1183 | hci_dev_put(hdev); | |
1184 | goto done; | |
1185 | } | |
23500189 MH |
1186 | } |
1187 | ||
5a6d2cf5 | 1188 | hci_pi(sk)->channel = haddr.hci_channel; |
aa1638dd MH |
1189 | |
1190 | if (!hci_sock_gen_cookie(sk)) { | |
1191 | /* In the case when a cookie has already been assigned, | |
1192 | * this socket will transition from a raw socket into | |
1193 | * an user channel socket. For a clean transition, send | |
1194 | * the close notification first. | |
1195 | */ | |
1196 | skb = create_monitor_ctrl_close(sk); | |
1197 | if (skb) { | |
1198 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, | |
1199 | HCI_SOCK_TRUSTED, NULL); | |
1200 | kfree_skb(skb); | |
1201 | } | |
1202 | } | |
1203 | ||
1204 | /* The user channel is restricted to CAP_NET_ADMIN | |
1205 | * capabilities and with that implicitly trusted. | |
1206 | */ | |
1207 | hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); | |
1208 | ||
23500189 | 1209 | hci_pi(sk)->hdev = hdev; |
5a6d2cf5 | 1210 | |
aa1638dd MH |
1211 | /* Send event to monitor */ |
1212 | skb = create_monitor_ctrl_open(sk); | |
1213 | if (skb) { | |
1214 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, | |
1215 | HCI_SOCK_TRUSTED, NULL); | |
1216 | kfree_skb(skb); | |
1217 | } | |
1218 | ||
5a6d2cf5 | 1219 | atomic_inc(&hdev->promisc); |
23500189 MH |
1220 | break; |
1221 | ||
cd82e61c MH |
1222 | case HCI_CHANNEL_MONITOR: |
1223 | if (haddr.hci_dev != HCI_DEV_NONE) { | |
1224 | err = -EINVAL; | |
1225 | goto done; | |
1226 | } | |
1227 | ||
1228 | if (!capable(CAP_NET_RAW)) { | |
1229 | err = -EPERM; | |
1230 | goto done; | |
1231 | } | |
1232 | ||
5a6d2cf5 MH |
1233 | hci_pi(sk)->channel = haddr.hci_channel; |
1234 | ||
50ebc055 MH |
1235 | /* The monitor interface is restricted to CAP_NET_RAW |
1236 | * capabilities and with that implicitly trusted. | |
1237 | */ | |
1238 | hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); | |
1239 | ||
787b306c JB |
1240 | send_monitor_note(sk, "Linux version %s (%s)", |
1241 | init_utsname()->release, | |
1242 | init_utsname()->machine); | |
9e8305b3 MH |
1243 | send_monitor_note(sk, "Bluetooth subsystem version %u.%u", |
1244 | BT_SUBSYS_VERSION, BT_SUBSYS_REVISION); | |
cd82e61c | 1245 | send_monitor_replay(sk); |
249fa169 | 1246 | send_monitor_control_replay(sk); |
cd82e61c MH |
1247 | |
1248 | atomic_inc(&monitor_promisc); | |
1249 | break; | |
1250 | ||
ac714949 MH |
1251 | case HCI_CHANNEL_LOGGING: |
1252 | if (haddr.hci_dev != HCI_DEV_NONE) { | |
1253 | err = -EINVAL; | |
1254 | goto done; | |
1255 | } | |
1256 | ||
1257 | if (!capable(CAP_NET_ADMIN)) { | |
1258 | err = -EPERM; | |
1259 | goto done; | |
1260 | } | |
5a6d2cf5 MH |
1261 | |
1262 | hci_pi(sk)->channel = haddr.hci_channel; | |
ac714949 MH |
1263 | break; |
1264 | ||
7cc2ade2 | 1265 | default: |
801c1e8d JH |
1266 | if (!hci_mgmt_chan_find(haddr.hci_channel)) { |
1267 | err = -EINVAL; | |
1268 | goto done; | |
1269 | } | |
1270 | ||
1271 | if (haddr.hci_dev != HCI_DEV_NONE) { | |
1272 | err = -EINVAL; | |
1273 | goto done; | |
1274 | } | |
1275 | ||
1195fbb8 MH |
1276 | /* Users with CAP_NET_ADMIN capabilities are allowed |
1277 | * access to all management commands and events. For | |
1278 | * untrusted users the interface is restricted and | |
1279 | * also only untrusted events are sent. | |
50ebc055 | 1280 | */ |
1195fbb8 MH |
1281 | if (capable(CAP_NET_ADMIN)) |
1282 | hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); | |
50ebc055 | 1283 | |
5a6d2cf5 MH |
1284 | hci_pi(sk)->channel = haddr.hci_channel; |
1285 | ||
f9207338 MH |
1286 | /* At the moment the index and unconfigured index events |
1287 | * are enabled unconditionally. Setting them on each | |
1288 | * socket when binding keeps this functionality. They | |
1289 | * however might be cleared later and then sending of these | |
1290 | * events will be disabled, but that is then intentional. | |
f6b7712e MH |
1291 | * |
1292 | * This also enables generic events that are safe to be | |
1293 | * received by untrusted users. Example for such events | |
1294 | * are changes to settings, class of device, name etc. | |
f9207338 | 1295 | */ |
5a6d2cf5 | 1296 | if (hci_pi(sk)->channel == HCI_CHANNEL_CONTROL) { |
f4cdbb3f MH |
1297 | if (!hci_sock_gen_cookie(sk)) { |
1298 | /* In the case when a cookie has already been | |
1299 | * assigned, this socket will transtion from | |
1300 | * a raw socket into a control socket. To | |
1301 | * allow for a clean transtion, send the | |
1302 | * close notification first. | |
1303 | */ | |
1304 | skb = create_monitor_ctrl_close(sk); | |
1305 | if (skb) { | |
1306 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, | |
1307 | HCI_SOCK_TRUSTED, NULL); | |
1308 | kfree_skb(skb); | |
1309 | } | |
1310 | } | |
70ecce91 | 1311 | |
249fa169 MH |
1312 | /* Send event to monitor */ |
1313 | skb = create_monitor_ctrl_open(sk); | |
1314 | if (skb) { | |
1315 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, | |
1316 | HCI_SOCK_TRUSTED, NULL); | |
1317 | kfree_skb(skb); | |
1318 | } | |
1319 | ||
f9207338 MH |
1320 | hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS); |
1321 | hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS); | |
5504c3a3 MH |
1322 | hci_sock_set_flag(sk, HCI_MGMT_OPTION_EVENTS); |
1323 | hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS); | |
1324 | hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS); | |
1325 | hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS); | |
f9207338 | 1326 | } |
801c1e8d | 1327 | break; |
1da177e4 LT |
1328 | } |
1329 | ||
1da177e4 LT |
1330 | sk->sk_state = BT_BOUND; |
1331 | ||
1332 | done: | |
1333 | release_sock(sk); | |
1334 | return err; | |
1335 | } | |
1336 | ||
8fc9ced3 GP |
1337 | static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, |
1338 | int *addr_len, int peer) | |
1da177e4 | 1339 | { |
8528d3f7 | 1340 | struct sockaddr_hci *haddr = (struct sockaddr_hci *)addr; |
1da177e4 | 1341 | struct sock *sk = sock->sk; |
9d4b68b2 MH |
1342 | struct hci_dev *hdev; |
1343 | int err = 0; | |
1da177e4 LT |
1344 | |
1345 | BT_DBG("sock %p sk %p", sock, sk); | |
1346 | ||
06f43cbc MH |
1347 | if (peer) |
1348 | return -EOPNOTSUPP; | |
1349 | ||
1da177e4 LT |
1350 | lock_sock(sk); |
1351 | ||
9d4b68b2 MH |
1352 | hdev = hci_pi(sk)->hdev; |
1353 | if (!hdev) { | |
1354 | err = -EBADFD; | |
1355 | goto done; | |
1356 | } | |
1357 | ||
1da177e4 LT |
1358 | *addr_len = sizeof(*haddr); |
1359 | haddr->hci_family = AF_BLUETOOTH; | |
7b005bd3 | 1360 | haddr->hci_dev = hdev->id; |
9d4b68b2 | 1361 | haddr->hci_channel= hci_pi(sk)->channel; |
1da177e4 | 1362 | |
9d4b68b2 | 1363 | done: |
1da177e4 | 1364 | release_sock(sk); |
9d4b68b2 | 1365 | return err; |
1da177e4 LT |
1366 | } |
1367 | ||
6039aa73 GP |
1368 | static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, |
1369 | struct sk_buff *skb) | |
1da177e4 LT |
1370 | { |
1371 | __u32 mask = hci_pi(sk)->cmsg_mask; | |
1372 | ||
0d48d939 MH |
1373 | if (mask & HCI_CMSG_DIR) { |
1374 | int incoming = bt_cb(skb)->incoming; | |
8fc9ced3 GP |
1375 | put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), |
1376 | &incoming); | |
0d48d939 | 1377 | } |
1da177e4 | 1378 | |
a61bbcf2 | 1379 | if (mask & HCI_CMSG_TSTAMP) { |
f6e623a6 JFS |
1380 | #ifdef CONFIG_COMPAT |
1381 | struct compat_timeval ctv; | |
1382 | #endif | |
a61bbcf2 | 1383 | struct timeval tv; |
767c5eb5 MH |
1384 | void *data; |
1385 | int len; | |
a61bbcf2 PM |
1386 | |
1387 | skb_get_timestamp(skb, &tv); | |
767c5eb5 | 1388 | |
1da97f83 DM |
1389 | data = &tv; |
1390 | len = sizeof(tv); | |
1391 | #ifdef CONFIG_COMPAT | |
da88cea1 L |
1392 | if (!COMPAT_USE_64BIT_TIME && |
1393 | (msg->msg_flags & MSG_CMSG_COMPAT)) { | |
767c5eb5 MH |
1394 | ctv.tv_sec = tv.tv_sec; |
1395 | ctv.tv_usec = tv.tv_usec; | |
1396 | data = &ctv; | |
1397 | len = sizeof(ctv); | |
767c5eb5 | 1398 | } |
1da97f83 | 1399 | #endif |
767c5eb5 MH |
1400 | |
1401 | put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data); | |
a61bbcf2 | 1402 | } |
1da177e4 | 1403 | } |
8e87d142 | 1404 | |
8528d3f7 MH |
1405 | static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1406 | size_t len, int flags) | |
1da177e4 LT |
1407 | { |
1408 | int noblock = flags & MSG_DONTWAIT; | |
1409 | struct sock *sk = sock->sk; | |
1410 | struct sk_buff *skb; | |
1411 | int copied, err; | |
83871f8c | 1412 | unsigned int skblen; |
1da177e4 LT |
1413 | |
1414 | BT_DBG("sock %p, sk %p", sock, sk); | |
1415 | ||
d94a6104 | 1416 | if (flags & MSG_OOB) |
1da177e4 LT |
1417 | return -EOPNOTSUPP; |
1418 | ||
ac714949 MH |
1419 | if (hci_pi(sk)->channel == HCI_CHANNEL_LOGGING) |
1420 | return -EOPNOTSUPP; | |
1421 | ||
1da177e4 LT |
1422 | if (sk->sk_state == BT_CLOSED) |
1423 | return 0; | |
1424 | ||
70f23020 AE |
1425 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
1426 | if (!skb) | |
1da177e4 LT |
1427 | return err; |
1428 | ||
83871f8c | 1429 | skblen = skb->len; |
1da177e4 LT |
1430 | copied = skb->len; |
1431 | if (len < copied) { | |
1432 | msg->msg_flags |= MSG_TRUNC; | |
1433 | copied = len; | |
1434 | } | |
1435 | ||
badff6d0 | 1436 | skb_reset_transport_header(skb); |
51f3d02b | 1437 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 | 1438 | |
3a208627 MH |
1439 | switch (hci_pi(sk)->channel) { |
1440 | case HCI_CHANNEL_RAW: | |
1441 | hci_sock_cmsg(sk, msg, skb); | |
1442 | break; | |
23500189 | 1443 | case HCI_CHANNEL_USER: |
cd82e61c MH |
1444 | case HCI_CHANNEL_MONITOR: |
1445 | sock_recv_timestamp(msg, sk, skb); | |
1446 | break; | |
801c1e8d JH |
1447 | default: |
1448 | if (hci_mgmt_chan_find(hci_pi(sk)->channel)) | |
1449 | sock_recv_timestamp(msg, sk, skb); | |
1450 | break; | |
3a208627 | 1451 | } |
1da177e4 LT |
1452 | |
1453 | skb_free_datagram(sk, skb); | |
1454 | ||
4f34228b | 1455 | if (flags & MSG_TRUNC) |
83871f8c DK |
1456 | copied = skblen; |
1457 | ||
1da177e4 LT |
1458 | return err ? : copied; |
1459 | } | |
1460 | ||
fa4335d7 JH |
1461 | static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk, |
1462 | struct msghdr *msg, size_t msglen) | |
1463 | { | |
1464 | void *buf; | |
1465 | u8 *cp; | |
1466 | struct mgmt_hdr *hdr; | |
1467 | u16 opcode, index, len; | |
1468 | struct hci_dev *hdev = NULL; | |
1469 | const struct hci_mgmt_handler *handler; | |
1470 | bool var_len, no_hdev; | |
1471 | int err; | |
1472 | ||
1473 | BT_DBG("got %zu bytes", msglen); | |
1474 | ||
1475 | if (msglen < sizeof(*hdr)) | |
1476 | return -EINVAL; | |
1477 | ||
1478 | buf = kmalloc(msglen, GFP_KERNEL); | |
1479 | if (!buf) | |
1480 | return -ENOMEM; | |
1481 | ||
1482 | if (memcpy_from_msg(buf, msg, msglen)) { | |
1483 | err = -EFAULT; | |
1484 | goto done; | |
1485 | } | |
1486 | ||
1487 | hdr = buf; | |
1488 | opcode = __le16_to_cpu(hdr->opcode); | |
1489 | index = __le16_to_cpu(hdr->index); | |
1490 | len = __le16_to_cpu(hdr->len); | |
1491 | ||
1492 | if (len != msglen - sizeof(*hdr)) { | |
1493 | err = -EINVAL; | |
1494 | goto done; | |
1495 | } | |
1496 | ||
38ceaa00 MH |
1497 | if (chan->channel == HCI_CHANNEL_CONTROL) { |
1498 | struct sk_buff *skb; | |
1499 | ||
1500 | /* Send event to monitor */ | |
1501 | skb = create_monitor_ctrl_command(sk, index, opcode, len, | |
1502 | buf + sizeof(*hdr)); | |
1503 | if (skb) { | |
1504 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, | |
1505 | HCI_SOCK_TRUSTED, NULL); | |
1506 | kfree_skb(skb); | |
1507 | } | |
1508 | } | |
1509 | ||
fa4335d7 JH |
1510 | if (opcode >= chan->handler_count || |
1511 | chan->handlers[opcode].func == NULL) { | |
1512 | BT_DBG("Unknown op %u", opcode); | |
1513 | err = mgmt_cmd_status(sk, index, opcode, | |
1514 | MGMT_STATUS_UNKNOWN_COMMAND); | |
1515 | goto done; | |
1516 | } | |
1517 | ||
1518 | handler = &chan->handlers[opcode]; | |
1519 | ||
1520 | if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) && | |
1521 | !(handler->flags & HCI_MGMT_UNTRUSTED)) { | |
1522 | err = mgmt_cmd_status(sk, index, opcode, | |
1523 | MGMT_STATUS_PERMISSION_DENIED); | |
1524 | goto done; | |
1525 | } | |
1526 | ||
1527 | if (index != MGMT_INDEX_NONE) { | |
1528 | hdev = hci_dev_get(index); | |
1529 | if (!hdev) { | |
1530 | err = mgmt_cmd_status(sk, index, opcode, | |
1531 | MGMT_STATUS_INVALID_INDEX); | |
1532 | goto done; | |
1533 | } | |
1534 | ||
1535 | if (hci_dev_test_flag(hdev, HCI_SETUP) || | |
1536 | hci_dev_test_flag(hdev, HCI_CONFIG) || | |
1537 | hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { | |
1538 | err = mgmt_cmd_status(sk, index, opcode, | |
1539 | MGMT_STATUS_INVALID_INDEX); | |
1540 | goto done; | |
1541 | } | |
1542 | ||
1543 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) && | |
1544 | !(handler->flags & HCI_MGMT_UNCONFIGURED)) { | |
1545 | err = mgmt_cmd_status(sk, index, opcode, | |
1546 | MGMT_STATUS_INVALID_INDEX); | |
1547 | goto done; | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | no_hdev = (handler->flags & HCI_MGMT_NO_HDEV); | |
1552 | if (no_hdev != !hdev) { | |
1553 | err = mgmt_cmd_status(sk, index, opcode, | |
1554 | MGMT_STATUS_INVALID_INDEX); | |
1555 | goto done; | |
1556 | } | |
1557 | ||
1558 | var_len = (handler->flags & HCI_MGMT_VAR_LEN); | |
1559 | if ((var_len && len < handler->data_len) || | |
1560 | (!var_len && len != handler->data_len)) { | |
1561 | err = mgmt_cmd_status(sk, index, opcode, | |
1562 | MGMT_STATUS_INVALID_PARAMS); | |
1563 | goto done; | |
1564 | } | |
1565 | ||
1566 | if (hdev && chan->hdev_init) | |
1567 | chan->hdev_init(sk, hdev); | |
1568 | ||
1569 | cp = buf + sizeof(*hdr); | |
1570 | ||
1571 | err = handler->func(sk, hdev, cp, len); | |
1572 | if (err < 0) | |
1573 | goto done; | |
1574 | ||
1575 | err = msglen; | |
1576 | ||
1577 | done: | |
1578 | if (hdev) | |
1579 | hci_dev_put(hdev); | |
1580 | ||
1581 | kfree(buf); | |
1582 | return err; | |
1583 | } | |
1584 | ||
ac714949 MH |
1585 | static int hci_logging_frame(struct sock *sk, struct msghdr *msg, int len) |
1586 | { | |
1587 | struct hci_mon_hdr *hdr; | |
1588 | struct sk_buff *skb; | |
1589 | struct hci_dev *hdev; | |
1590 | u16 index; | |
1591 | int err; | |
1592 | ||
1593 | /* The logging frame consists at minimum of the standard header, | |
1594 | * the priority byte, the ident length byte and at least one string | |
1595 | * terminator NUL byte. Anything shorter are invalid packets. | |
1596 | */ | |
1597 | if (len < sizeof(*hdr) + 3) | |
1598 | return -EINVAL; | |
1599 | ||
1600 | skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err); | |
1601 | if (!skb) | |
1602 | return err; | |
1603 | ||
1604 | if (memcpy_from_msg(skb_put(skb, len), msg, len)) { | |
1605 | err = -EFAULT; | |
1606 | goto drop; | |
1607 | } | |
1608 | ||
1609 | hdr = (void *)skb->data; | |
1610 | ||
1611 | if (__le16_to_cpu(hdr->len) != len - sizeof(*hdr)) { | |
1612 | err = -EINVAL; | |
1613 | goto drop; | |
1614 | } | |
1615 | ||
1616 | if (__le16_to_cpu(hdr->opcode) == 0x0000) { | |
1617 | __u8 priority = skb->data[sizeof(*hdr)]; | |
1618 | __u8 ident_len = skb->data[sizeof(*hdr) + 1]; | |
1619 | ||
1620 | /* Only the priorities 0-7 are valid and with that any other | |
1621 | * value results in an invalid packet. | |
1622 | * | |
1623 | * The priority byte is followed by an ident length byte and | |
1624 | * the NUL terminated ident string. Check that the ident | |
1625 | * length is not overflowing the packet and also that the | |
1626 | * ident string itself is NUL terminated. In case the ident | |
1627 | * length is zero, the length value actually doubles as NUL | |
1628 | * terminator identifier. | |
1629 | * | |
1630 | * The message follows the ident string (if present) and | |
1631 | * must be NUL terminated. Otherwise it is not a valid packet. | |
1632 | */ | |
1633 | if (priority > 7 || skb->data[len - 1] != 0x00 || | |
1634 | ident_len > len - sizeof(*hdr) - 3 || | |
1635 | skb->data[sizeof(*hdr) + ident_len + 1] != 0x00) { | |
1636 | err = -EINVAL; | |
1637 | goto drop; | |
1638 | } | |
1639 | } else { | |
1640 | err = -EINVAL; | |
1641 | goto drop; | |
1642 | } | |
1643 | ||
1644 | index = __le16_to_cpu(hdr->index); | |
1645 | ||
1646 | if (index != MGMT_INDEX_NONE) { | |
1647 | hdev = hci_dev_get(index); | |
1648 | if (!hdev) { | |
1649 | err = -ENODEV; | |
1650 | goto drop; | |
1651 | } | |
1652 | } else { | |
1653 | hdev = NULL; | |
1654 | } | |
1655 | ||
1656 | hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING); | |
1657 | ||
1658 | hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL); | |
1659 | err = len; | |
1660 | ||
1661 | if (hdev) | |
1662 | hci_dev_put(hdev); | |
1663 | ||
1664 | drop: | |
1665 | kfree_skb(skb); | |
1666 | return err; | |
1667 | } | |
1668 | ||
1b784140 YX |
1669 | static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
1670 | size_t len) | |
1da177e4 LT |
1671 | { |
1672 | struct sock *sk = sock->sk; | |
801c1e8d | 1673 | struct hci_mgmt_chan *chan; |
1da177e4 LT |
1674 | struct hci_dev *hdev; |
1675 | struct sk_buff *skb; | |
1676 | int err; | |
1677 | ||
1678 | BT_DBG("sock %p sk %p", sock, sk); | |
1679 | ||
1680 | if (msg->msg_flags & MSG_OOB) | |
1681 | return -EOPNOTSUPP; | |
1682 | ||
1683 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE)) | |
1684 | return -EINVAL; | |
1685 | ||
1686 | if (len < 4 || len > HCI_MAX_FRAME_SIZE) | |
1687 | return -EINVAL; | |
1688 | ||
1689 | lock_sock(sk); | |
1690 | ||
0381101f JH |
1691 | switch (hci_pi(sk)->channel) { |
1692 | case HCI_CHANNEL_RAW: | |
23500189 | 1693 | case HCI_CHANNEL_USER: |
0381101f | 1694 | break; |
cd82e61c MH |
1695 | case HCI_CHANNEL_MONITOR: |
1696 | err = -EOPNOTSUPP; | |
1697 | goto done; | |
ac714949 MH |
1698 | case HCI_CHANNEL_LOGGING: |
1699 | err = hci_logging_frame(sk, msg, len); | |
1700 | goto done; | |
0381101f | 1701 | default: |
801c1e8d JH |
1702 | mutex_lock(&mgmt_chan_list_lock); |
1703 | chan = __hci_mgmt_chan_find(hci_pi(sk)->channel); | |
1704 | if (chan) | |
fa4335d7 | 1705 | err = hci_mgmt_cmd(chan, sk, msg, len); |
801c1e8d JH |
1706 | else |
1707 | err = -EINVAL; | |
1708 | ||
1709 | mutex_unlock(&mgmt_chan_list_lock); | |
0381101f JH |
1710 | goto done; |
1711 | } | |
1712 | ||
70f23020 AE |
1713 | hdev = hci_pi(sk)->hdev; |
1714 | if (!hdev) { | |
1da177e4 LT |
1715 | err = -EBADFD; |
1716 | goto done; | |
1717 | } | |
1718 | ||
7e21addc MH |
1719 | if (!test_bit(HCI_UP, &hdev->flags)) { |
1720 | err = -ENETDOWN; | |
1721 | goto done; | |
1722 | } | |
1723 | ||
70f23020 AE |
1724 | skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err); |
1725 | if (!skb) | |
1da177e4 LT |
1726 | goto done; |
1727 | ||
6ce8e9ce | 1728 | if (memcpy_from_msg(skb_put(skb, len), msg, len)) { |
1da177e4 LT |
1729 | err = -EFAULT; |
1730 | goto drop; | |
1731 | } | |
1732 | ||
8528d3f7 | 1733 | hci_skb_pkt_type(skb) = skb->data[0]; |
1da177e4 | 1734 | skb_pull(skb, 1); |
1da177e4 | 1735 | |
1bc5ad16 MH |
1736 | if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { |
1737 | /* No permission check is needed for user channel | |
1738 | * since that gets enforced when binding the socket. | |
1739 | * | |
1740 | * However check that the packet type is valid. | |
1741 | */ | |
d79f34e3 MH |
1742 | if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT && |
1743 | hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT && | |
1744 | hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) { | |
1bc5ad16 MH |
1745 | err = -EINVAL; |
1746 | goto drop; | |
1747 | } | |
1748 | ||
1749 | skb_queue_tail(&hdev->raw_q, skb); | |
1750 | queue_work(hdev->workqueue, &hdev->tx_work); | |
d79f34e3 | 1751 | } else if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT) { |
83985319 | 1752 | u16 opcode = get_unaligned_le16(skb->data); |
1da177e4 LT |
1753 | u16 ogf = hci_opcode_ogf(opcode); |
1754 | u16 ocf = hci_opcode_ocf(opcode); | |
1755 | ||
1756 | if (((ogf > HCI_SFLT_MAX_OGF) || | |
3bb3c755 GP |
1757 | !hci_test_bit(ocf & HCI_FLT_OCF_BITS, |
1758 | &hci_sec_filter.ocf_mask[ogf])) && | |
1759 | !capable(CAP_NET_RAW)) { | |
1da177e4 LT |
1760 | err = -EPERM; |
1761 | goto drop; | |
1762 | } | |
1763 | ||
1982162b MH |
1764 | /* Since the opcode has already been extracted here, store |
1765 | * a copy of the value for later use by the drivers. | |
1766 | */ | |
1767 | hci_skb_opcode(skb) = opcode; | |
1768 | ||
fee746b0 | 1769 | if (ogf == 0x3f) { |
1da177e4 | 1770 | skb_queue_tail(&hdev->raw_q, skb); |
3eff45ea | 1771 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 | 1772 | } else { |
49c922bb | 1773 | /* Stand-alone HCI commands must be flagged as |
11714b3d JH |
1774 | * single-command requests. |
1775 | */ | |
44d27137 | 1776 | bt_cb(skb)->hci.req_flags |= HCI_REQ_START; |
11714b3d | 1777 | |
1da177e4 | 1778 | skb_queue_tail(&hdev->cmd_q, skb); |
c347b765 | 1779 | queue_work(hdev->workqueue, &hdev->cmd_work); |
1da177e4 LT |
1780 | } |
1781 | } else { | |
1782 | if (!capable(CAP_NET_RAW)) { | |
1783 | err = -EPERM; | |
1784 | goto drop; | |
1785 | } | |
1786 | ||
d79f34e3 MH |
1787 | if (hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT && |
1788 | hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) { | |
bb77543e MH |
1789 | err = -EINVAL; |
1790 | goto drop; | |
1791 | } | |
1792 | ||
1da177e4 | 1793 | skb_queue_tail(&hdev->raw_q, skb); |
3eff45ea | 1794 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 LT |
1795 | } |
1796 | ||
1797 | err = len; | |
1798 | ||
1799 | done: | |
1800 | release_sock(sk); | |
1801 | return err; | |
1802 | ||
1803 | drop: | |
1804 | kfree_skb(skb); | |
1805 | goto done; | |
1806 | } | |
1807 | ||
8fc9ced3 GP |
1808 | static int hci_sock_setsockopt(struct socket *sock, int level, int optname, |
1809 | char __user *optval, unsigned int len) | |
1da177e4 LT |
1810 | { |
1811 | struct hci_ufilter uf = { .opcode = 0 }; | |
1812 | struct sock *sk = sock->sk; | |
1813 | int err = 0, opt = 0; | |
1814 | ||
1815 | BT_DBG("sk %p, opt %d", sk, optname); | |
1816 | ||
47b0f573 MH |
1817 | if (level != SOL_HCI) |
1818 | return -ENOPROTOOPT; | |
1819 | ||
1da177e4 LT |
1820 | lock_sock(sk); |
1821 | ||
2f39cdb7 | 1822 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { |
c2371e80 | 1823 | err = -EBADFD; |
2f39cdb7 MH |
1824 | goto done; |
1825 | } | |
1826 | ||
1da177e4 LT |
1827 | switch (optname) { |
1828 | case HCI_DATA_DIR: | |
1829 | if (get_user(opt, (int __user *)optval)) { | |
1830 | err = -EFAULT; | |
1831 | break; | |
1832 | } | |
1833 | ||
1834 | if (opt) | |
1835 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR; | |
1836 | else | |
1837 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR; | |
1838 | break; | |
1839 | ||
1840 | case HCI_TIME_STAMP: | |
1841 | if (get_user(opt, (int __user *)optval)) { | |
1842 | err = -EFAULT; | |
1843 | break; | |
1844 | } | |
1845 | ||
1846 | if (opt) | |
1847 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP; | |
1848 | else | |
1849 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP; | |
1850 | break; | |
1851 | ||
1852 | case HCI_FILTER: | |
0878b666 MH |
1853 | { |
1854 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1855 | ||
1856 | uf.type_mask = f->type_mask; | |
1857 | uf.opcode = f->opcode; | |
1858 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
1859 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
1860 | } | |
1861 | ||
1da177e4 LT |
1862 | len = min_t(unsigned int, len, sizeof(uf)); |
1863 | if (copy_from_user(&uf, optval, len)) { | |
1864 | err = -EFAULT; | |
1865 | break; | |
1866 | } | |
1867 | ||
1868 | if (!capable(CAP_NET_RAW)) { | |
1869 | uf.type_mask &= hci_sec_filter.type_mask; | |
1870 | uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0); | |
1871 | uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1); | |
1872 | } | |
1873 | ||
1874 | { | |
1875 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1876 | ||
1877 | f->type_mask = uf.type_mask; | |
1878 | f->opcode = uf.opcode; | |
1879 | *((u32 *) f->event_mask + 0) = uf.event_mask[0]; | |
1880 | *((u32 *) f->event_mask + 1) = uf.event_mask[1]; | |
1881 | } | |
8e87d142 | 1882 | break; |
1da177e4 LT |
1883 | |
1884 | default: | |
1885 | err = -ENOPROTOOPT; | |
1886 | break; | |
1887 | } | |
1888 | ||
2f39cdb7 | 1889 | done: |
1da177e4 LT |
1890 | release_sock(sk); |
1891 | return err; | |
1892 | } | |
1893 | ||
8fc9ced3 GP |
1894 | static int hci_sock_getsockopt(struct socket *sock, int level, int optname, |
1895 | char __user *optval, int __user *optlen) | |
1da177e4 LT |
1896 | { |
1897 | struct hci_ufilter uf; | |
1898 | struct sock *sk = sock->sk; | |
cedc5469 MH |
1899 | int len, opt, err = 0; |
1900 | ||
1901 | BT_DBG("sk %p, opt %d", sk, optname); | |
1da177e4 | 1902 | |
47b0f573 MH |
1903 | if (level != SOL_HCI) |
1904 | return -ENOPROTOOPT; | |
1905 | ||
1da177e4 LT |
1906 | if (get_user(len, optlen)) |
1907 | return -EFAULT; | |
1908 | ||
cedc5469 MH |
1909 | lock_sock(sk); |
1910 | ||
1911 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { | |
c2371e80 | 1912 | err = -EBADFD; |
cedc5469 MH |
1913 | goto done; |
1914 | } | |
1915 | ||
1da177e4 LT |
1916 | switch (optname) { |
1917 | case HCI_DATA_DIR: | |
1918 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR) | |
1919 | opt = 1; | |
8e87d142 | 1920 | else |
1da177e4 LT |
1921 | opt = 0; |
1922 | ||
1923 | if (put_user(opt, optval)) | |
cedc5469 | 1924 | err = -EFAULT; |
1da177e4 LT |
1925 | break; |
1926 | ||
1927 | case HCI_TIME_STAMP: | |
1928 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP) | |
1929 | opt = 1; | |
8e87d142 | 1930 | else |
1da177e4 LT |
1931 | opt = 0; |
1932 | ||
1933 | if (put_user(opt, optval)) | |
cedc5469 | 1934 | err = -EFAULT; |
1da177e4 LT |
1935 | break; |
1936 | ||
1937 | case HCI_FILTER: | |
1938 | { | |
1939 | struct hci_filter *f = &hci_pi(sk)->filter; | |
1940 | ||
e15ca9a0 | 1941 | memset(&uf, 0, sizeof(uf)); |
1da177e4 LT |
1942 | uf.type_mask = f->type_mask; |
1943 | uf.opcode = f->opcode; | |
1944 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
1945 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
1946 | } | |
1947 | ||
1948 | len = min_t(unsigned int, len, sizeof(uf)); | |
1949 | if (copy_to_user(optval, &uf, len)) | |
cedc5469 | 1950 | err = -EFAULT; |
1da177e4 LT |
1951 | break; |
1952 | ||
1953 | default: | |
cedc5469 | 1954 | err = -ENOPROTOOPT; |
1da177e4 LT |
1955 | break; |
1956 | } | |
1957 | ||
cedc5469 MH |
1958 | done: |
1959 | release_sock(sk); | |
1960 | return err; | |
1da177e4 LT |
1961 | } |
1962 | ||
90ddc4f0 | 1963 | static const struct proto_ops hci_sock_ops = { |
1da177e4 LT |
1964 | .family = PF_BLUETOOTH, |
1965 | .owner = THIS_MODULE, | |
1966 | .release = hci_sock_release, | |
1967 | .bind = hci_sock_bind, | |
1968 | .getname = hci_sock_getname, | |
1969 | .sendmsg = hci_sock_sendmsg, | |
1970 | .recvmsg = hci_sock_recvmsg, | |
1971 | .ioctl = hci_sock_ioctl, | |
1972 | .poll = datagram_poll, | |
1973 | .listen = sock_no_listen, | |
1974 | .shutdown = sock_no_shutdown, | |
1975 | .setsockopt = hci_sock_setsockopt, | |
1976 | .getsockopt = hci_sock_getsockopt, | |
1977 | .connect = sock_no_connect, | |
1978 | .socketpair = sock_no_socketpair, | |
1979 | .accept = sock_no_accept, | |
1980 | .mmap = sock_no_mmap | |
1981 | }; | |
1982 | ||
1983 | static struct proto hci_sk_proto = { | |
1984 | .name = "HCI", | |
1985 | .owner = THIS_MODULE, | |
1986 | .obj_size = sizeof(struct hci_pinfo) | |
1987 | }; | |
1988 | ||
3f378b68 EP |
1989 | static int hci_sock_create(struct net *net, struct socket *sock, int protocol, |
1990 | int kern) | |
1da177e4 LT |
1991 | { |
1992 | struct sock *sk; | |
1993 | ||
1994 | BT_DBG("sock %p", sock); | |
1995 | ||
1996 | if (sock->type != SOCK_RAW) | |
1997 | return -ESOCKTNOSUPPORT; | |
1998 | ||
1999 | sock->ops = &hci_sock_ops; | |
2000 | ||
11aa9c28 | 2001 | sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern); |
1da177e4 LT |
2002 | if (!sk) |
2003 | return -ENOMEM; | |
2004 | ||
2005 | sock_init_data(sock, sk); | |
2006 | ||
2007 | sock_reset_flag(sk, SOCK_ZAPPED); | |
2008 | ||
2009 | sk->sk_protocol = protocol; | |
2010 | ||
2011 | sock->state = SS_UNCONNECTED; | |
2012 | sk->sk_state = BT_OPEN; | |
2013 | ||
2014 | bt_sock_link(&hci_sk_list, sk); | |
2015 | return 0; | |
2016 | } | |
2017 | ||
ec1b4cf7 | 2018 | static const struct net_proto_family hci_sock_family_ops = { |
1da177e4 LT |
2019 | .family = PF_BLUETOOTH, |
2020 | .owner = THIS_MODULE, | |
2021 | .create = hci_sock_create, | |
2022 | }; | |
2023 | ||
1da177e4 LT |
2024 | int __init hci_sock_init(void) |
2025 | { | |
2026 | int err; | |
2027 | ||
b0a8e282 MH |
2028 | BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr)); |
2029 | ||
1da177e4 LT |
2030 | err = proto_register(&hci_sk_proto, 0); |
2031 | if (err < 0) | |
2032 | return err; | |
2033 | ||
2034 | err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops); | |
f7c86637 MY |
2035 | if (err < 0) { |
2036 | BT_ERR("HCI socket registration failed"); | |
1da177e4 | 2037 | goto error; |
f7c86637 MY |
2038 | } |
2039 | ||
b0316615 | 2040 | err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL); |
f7c86637 MY |
2041 | if (err < 0) { |
2042 | BT_ERR("Failed to create HCI proc file"); | |
2043 | bt_sock_unregister(BTPROTO_HCI); | |
2044 | goto error; | |
2045 | } | |
1da177e4 | 2046 | |
1da177e4 LT |
2047 | BT_INFO("HCI socket layer initialized"); |
2048 | ||
2049 | return 0; | |
2050 | ||
2051 | error: | |
1da177e4 LT |
2052 | proto_unregister(&hci_sk_proto); |
2053 | return err; | |
2054 | } | |
2055 | ||
b7440a14 | 2056 | void hci_sock_cleanup(void) |
1da177e4 | 2057 | { |
f7c86637 | 2058 | bt_procfs_cleanup(&init_net, "hci"); |
5e9d7f86 | 2059 | bt_sock_unregister(BTPROTO_HCI); |
1da177e4 | 2060 | proto_unregister(&hci_sk_proto); |
1da177e4 | 2061 | } |