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