Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
2 | RFCOMM implementation for Linux Bluetooth stack (BlueZ). |
3 | Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> | |
4 | Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org> | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License version 2 as | |
8 | published by the Free Software Foundation; | |
9 | ||
10 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
11 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
12 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
13 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
14 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
15 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
17 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
18 | ||
8e87d142 YH |
19 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
20 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
21 | SOFTWARE IS DISCLAIMED. |
22 | */ | |
23 | ||
24 | /* | |
25 | * RFCOMM TTY. | |
26 | * | |
27 | * $Id: tty.c,v 1.24 2002/10/03 01:54:38 holtmann Exp $ | |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | ||
32 | #include <linux/tty.h> | |
33 | #include <linux/tty_driver.h> | |
34 | #include <linux/tty_flip.h> | |
35 | ||
4fc268d2 | 36 | #include <linux/capability.h> |
1da177e4 LT |
37 | #include <linux/slab.h> |
38 | #include <linux/skbuff.h> | |
39 | ||
40 | #include <net/bluetooth/bluetooth.h> | |
0a85b964 | 41 | #include <net/bluetooth/hci_core.h> |
1da177e4 LT |
42 | #include <net/bluetooth/rfcomm.h> |
43 | ||
44 | #ifndef CONFIG_BT_RFCOMM_DEBUG | |
45 | #undef BT_DBG | |
46 | #define BT_DBG(D...) | |
47 | #endif | |
48 | ||
49 | #define RFCOMM_TTY_MAGIC 0x6d02 /* magic number for rfcomm struct */ | |
50 | #define RFCOMM_TTY_PORTS RFCOMM_MAX_DEV /* whole lotta rfcomm devices */ | |
51 | #define RFCOMM_TTY_MAJOR 216 /* device node major id of the usb/bluetooth.c driver */ | |
52 | #define RFCOMM_TTY_MINOR 0 | |
53 | ||
54 | static struct tty_driver *rfcomm_tty_driver; | |
55 | ||
56 | struct rfcomm_dev { | |
57 | struct list_head list; | |
58 | atomic_t refcnt; | |
59 | ||
60 | char name[12]; | |
61 | int id; | |
62 | unsigned long flags; | |
63 | int opened; | |
64 | int err; | |
65 | ||
66 | bdaddr_t src; | |
67 | bdaddr_t dst; | |
68 | u8 channel; | |
69 | ||
70 | uint modem_status; | |
71 | ||
72 | struct rfcomm_dlc *dlc; | |
73 | struct tty_struct *tty; | |
74 | wait_queue_head_t wait; | |
75 | struct tasklet_struct wakeup_task; | |
76 | ||
c1a33136 MH |
77 | struct device *tty_dev; |
78 | ||
1da177e4 LT |
79 | atomic_t wmem_alloc; |
80 | }; | |
81 | ||
82 | static LIST_HEAD(rfcomm_dev_list); | |
83 | static DEFINE_RWLOCK(rfcomm_dev_lock); | |
84 | ||
85 | static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb); | |
86 | static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err); | |
87 | static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig); | |
88 | ||
89 | static void rfcomm_tty_wakeup(unsigned long arg); | |
90 | ||
91 | /* ---- Device functions ---- */ | |
92 | static void rfcomm_dev_destruct(struct rfcomm_dev *dev) | |
93 | { | |
94 | struct rfcomm_dlc *dlc = dev->dlc; | |
95 | ||
96 | BT_DBG("dev %p dlc %p", dev, dlc); | |
97 | ||
f951375d DY |
98 | /* Refcount should only hit zero when called from rfcomm_dev_del() |
99 | which will have taken us off the list. Everything else are | |
100 | refcounting bugs. */ | |
101 | BUG_ON(!list_empty(&dev->list)); | |
8de0a154 | 102 | |
1da177e4 LT |
103 | rfcomm_dlc_lock(dlc); |
104 | /* Detach DLC if it's owned by this dev */ | |
105 | if (dlc->owner == dev) | |
106 | dlc->owner = NULL; | |
107 | rfcomm_dlc_unlock(dlc); | |
108 | ||
109 | rfcomm_dlc_put(dlc); | |
110 | ||
111 | tty_unregister_device(rfcomm_tty_driver, dev->id); | |
112 | ||
1da177e4 LT |
113 | kfree(dev); |
114 | ||
8e87d142 | 115 | /* It's safe to call module_put() here because socket still |
1da177e4 LT |
116 | holds reference to this module. */ |
117 | module_put(THIS_MODULE); | |
118 | } | |
119 | ||
120 | static inline void rfcomm_dev_hold(struct rfcomm_dev *dev) | |
121 | { | |
122 | atomic_inc(&dev->refcnt); | |
123 | } | |
124 | ||
125 | static inline void rfcomm_dev_put(struct rfcomm_dev *dev) | |
126 | { | |
127 | /* The reason this isn't actually a race, as you no | |
128 | doubt have a little voice screaming at you in your | |
129 | head, is that the refcount should never actually | |
130 | reach zero unless the device has already been taken | |
131 | off the list, in rfcomm_dev_del(). And if that's not | |
132 | true, we'll hit the BUG() in rfcomm_dev_destruct() | |
133 | anyway. */ | |
134 | if (atomic_dec_and_test(&dev->refcnt)) | |
135 | rfcomm_dev_destruct(dev); | |
136 | } | |
137 | ||
138 | static struct rfcomm_dev *__rfcomm_dev_get(int id) | |
139 | { | |
140 | struct rfcomm_dev *dev; | |
141 | struct list_head *p; | |
142 | ||
143 | list_for_each(p, &rfcomm_dev_list) { | |
144 | dev = list_entry(p, struct rfcomm_dev, list); | |
145 | if (dev->id == id) | |
146 | return dev; | |
147 | } | |
148 | ||
149 | return NULL; | |
150 | } | |
151 | ||
152 | static inline struct rfcomm_dev *rfcomm_dev_get(int id) | |
153 | { | |
154 | struct rfcomm_dev *dev; | |
155 | ||
156 | read_lock(&rfcomm_dev_lock); | |
157 | ||
158 | dev = __rfcomm_dev_get(id); | |
8de0a154 VT |
159 | |
160 | if (dev) { | |
161 | if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) | |
162 | dev = NULL; | |
163 | else | |
164 | rfcomm_dev_hold(dev); | |
165 | } | |
1da177e4 LT |
166 | |
167 | read_unlock(&rfcomm_dev_lock); | |
168 | ||
169 | return dev; | |
170 | } | |
171 | ||
0a85b964 MH |
172 | static struct device *rfcomm_get_device(struct rfcomm_dev *dev) |
173 | { | |
174 | struct hci_dev *hdev; | |
175 | struct hci_conn *conn; | |
176 | ||
177 | hdev = hci_get_route(&dev->dst, &dev->src); | |
178 | if (!hdev) | |
179 | return NULL; | |
180 | ||
181 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &dev->dst); | |
0a85b964 MH |
182 | |
183 | hci_dev_put(hdev); | |
184 | ||
b2cfcd75 | 185 | return conn ? &conn->dev : NULL; |
0a85b964 MH |
186 | } |
187 | ||
dae6a0f6 MH |
188 | static ssize_t show_address(struct device *tty_dev, struct device_attribute *attr, char *buf) |
189 | { | |
190 | struct rfcomm_dev *dev = dev_get_drvdata(tty_dev); | |
191 | bdaddr_t bdaddr; | |
192 | baswap(&bdaddr, &dev->dst); | |
193 | return sprintf(buf, "%s\n", batostr(&bdaddr)); | |
194 | } | |
195 | ||
196 | static ssize_t show_channel(struct device *tty_dev, struct device_attribute *attr, char *buf) | |
197 | { | |
198 | struct rfcomm_dev *dev = dev_get_drvdata(tty_dev); | |
199 | return sprintf(buf, "%d\n", dev->channel); | |
200 | } | |
201 | ||
202 | static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); | |
203 | static DEVICE_ATTR(channel, S_IRUGO, show_channel, NULL); | |
204 | ||
1da177e4 LT |
205 | static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc) |
206 | { | |
207 | struct rfcomm_dev *dev; | |
208 | struct list_head *head = &rfcomm_dev_list, *p; | |
209 | int err = 0; | |
210 | ||
211 | BT_DBG("id %d channel %d", req->dev_id, req->channel); | |
8e87d142 | 212 | |
25ea6db0 | 213 | dev = kzalloc(sizeof(struct rfcomm_dev), GFP_KERNEL); |
1da177e4 LT |
214 | if (!dev) |
215 | return -ENOMEM; | |
1da177e4 LT |
216 | |
217 | write_lock_bh(&rfcomm_dev_lock); | |
218 | ||
219 | if (req->dev_id < 0) { | |
220 | dev->id = 0; | |
221 | ||
222 | list_for_each(p, &rfcomm_dev_list) { | |
223 | if (list_entry(p, struct rfcomm_dev, list)->id != dev->id) | |
224 | break; | |
225 | ||
226 | dev->id++; | |
227 | head = p; | |
228 | } | |
229 | } else { | |
230 | dev->id = req->dev_id; | |
231 | ||
232 | list_for_each(p, &rfcomm_dev_list) { | |
233 | struct rfcomm_dev *entry = list_entry(p, struct rfcomm_dev, list); | |
234 | ||
235 | if (entry->id == dev->id) { | |
236 | err = -EADDRINUSE; | |
237 | goto out; | |
238 | } | |
239 | ||
240 | if (entry->id > dev->id - 1) | |
241 | break; | |
242 | ||
243 | head = p; | |
244 | } | |
245 | } | |
246 | ||
247 | if ((dev->id < 0) || (dev->id > RFCOMM_MAX_DEV - 1)) { | |
248 | err = -ENFILE; | |
249 | goto out; | |
250 | } | |
251 | ||
252 | sprintf(dev->name, "rfcomm%d", dev->id); | |
253 | ||
254 | list_add(&dev->list, head); | |
255 | atomic_set(&dev->refcnt, 1); | |
256 | ||
257 | bacpy(&dev->src, &req->src); | |
258 | bacpy(&dev->dst, &req->dst); | |
259 | dev->channel = req->channel; | |
260 | ||
8e87d142 | 261 | dev->flags = req->flags & |
1da177e4 LT |
262 | ((1 << RFCOMM_RELEASE_ONHUP) | (1 << RFCOMM_REUSE_DLC)); |
263 | ||
264 | init_waitqueue_head(&dev->wait); | |
265 | tasklet_init(&dev->wakeup_task, rfcomm_tty_wakeup, (unsigned long) dev); | |
266 | ||
267 | rfcomm_dlc_lock(dlc); | |
268 | dlc->data_ready = rfcomm_dev_data_ready; | |
269 | dlc->state_change = rfcomm_dev_state_change; | |
270 | dlc->modem_status = rfcomm_dev_modem_status; | |
271 | ||
272 | dlc->owner = dev; | |
273 | dev->dlc = dlc; | |
274 | rfcomm_dlc_unlock(dlc); | |
275 | ||
8e87d142 | 276 | /* It's safe to call __module_get() here because socket already |
1da177e4 LT |
277 | holds reference to this module. */ |
278 | __module_get(THIS_MODULE); | |
279 | ||
280 | out: | |
281 | write_unlock_bh(&rfcomm_dev_lock); | |
282 | ||
09c7d829 | 283 | if (err < 0) { |
1da177e4 LT |
284 | kfree(dev); |
285 | return err; | |
286 | } | |
287 | ||
c1a33136 | 288 | dev->tty_dev = tty_register_device(rfcomm_tty_driver, dev->id, NULL); |
1da177e4 | 289 | |
8de0a154 | 290 | if (IS_ERR(dev->tty_dev)) { |
09c7d829 | 291 | err = PTR_ERR(dev->tty_dev); |
8de0a154 VT |
292 | list_del(&dev->list); |
293 | kfree(dev); | |
09c7d829 | 294 | return err; |
8de0a154 VT |
295 | } |
296 | ||
dae6a0f6 MH |
297 | dev_set_drvdata(dev->tty_dev, dev); |
298 | ||
299 | if (device_create_file(dev->tty_dev, &dev_attr_address) < 0) | |
300 | BT_ERR("Failed to create address attribute"); | |
301 | ||
302 | if (device_create_file(dev->tty_dev, &dev_attr_channel) < 0) | |
303 | BT_ERR("Failed to create channel attribute"); | |
304 | ||
1da177e4 LT |
305 | return dev->id; |
306 | } | |
307 | ||
308 | static void rfcomm_dev_del(struct rfcomm_dev *dev) | |
309 | { | |
310 | BT_DBG("dev %p", dev); | |
311 | ||
f951375d DY |
312 | if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) |
313 | BUG_ON(1); | |
314 | else | |
315 | set_bit(RFCOMM_TTY_RELEASED, &dev->flags); | |
316 | ||
317 | write_lock_bh(&rfcomm_dev_lock); | |
318 | list_del_init(&dev->list); | |
319 | write_unlock_bh(&rfcomm_dev_lock); | |
320 | ||
1da177e4 LT |
321 | rfcomm_dev_put(dev); |
322 | } | |
323 | ||
324 | /* ---- Send buffer ---- */ | |
325 | static inline unsigned int rfcomm_room(struct rfcomm_dlc *dlc) | |
326 | { | |
327 | /* We can't let it be zero, because we don't get a callback | |
328 | when tx_credits becomes nonzero, hence we'd never wake up */ | |
329 | return dlc->mtu * (dlc->tx_credits?:1); | |
330 | } | |
331 | ||
332 | static void rfcomm_wfree(struct sk_buff *skb) | |
333 | { | |
334 | struct rfcomm_dev *dev = (void *) skb->sk; | |
335 | atomic_sub(skb->truesize, &dev->wmem_alloc); | |
336 | if (test_bit(RFCOMM_TTY_ATTACHED, &dev->flags)) | |
337 | tasklet_schedule(&dev->wakeup_task); | |
338 | rfcomm_dev_put(dev); | |
339 | } | |
340 | ||
341 | static inline void rfcomm_set_owner_w(struct sk_buff *skb, struct rfcomm_dev *dev) | |
342 | { | |
343 | rfcomm_dev_hold(dev); | |
344 | atomic_add(skb->truesize, &dev->wmem_alloc); | |
345 | skb->sk = (void *) dev; | |
346 | skb->destructor = rfcomm_wfree; | |
347 | } | |
348 | ||
dd0fc66f | 349 | static struct sk_buff *rfcomm_wmalloc(struct rfcomm_dev *dev, unsigned long size, gfp_t priority) |
1da177e4 LT |
350 | { |
351 | if (atomic_read(&dev->wmem_alloc) < rfcomm_room(dev->dlc)) { | |
352 | struct sk_buff *skb = alloc_skb(size, priority); | |
353 | if (skb) { | |
354 | rfcomm_set_owner_w(skb, dev); | |
355 | return skb; | |
356 | } | |
357 | } | |
358 | return NULL; | |
359 | } | |
360 | ||
361 | /* ---- Device IOCTLs ---- */ | |
362 | ||
363 | #define NOCAP_FLAGS ((1 << RFCOMM_REUSE_DLC) | (1 << RFCOMM_RELEASE_ONHUP)) | |
364 | ||
365 | static int rfcomm_create_dev(struct sock *sk, void __user *arg) | |
366 | { | |
367 | struct rfcomm_dev_req req; | |
368 | struct rfcomm_dlc *dlc; | |
369 | int id; | |
370 | ||
371 | if (copy_from_user(&req, arg, sizeof(req))) | |
372 | return -EFAULT; | |
373 | ||
8de0a154 | 374 | BT_DBG("sk %p dev_id %d flags 0x%x", sk, req.dev_id, req.flags); |
1da177e4 LT |
375 | |
376 | if (req.flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN)) | |
377 | return -EPERM; | |
378 | ||
379 | if (req.flags & (1 << RFCOMM_REUSE_DLC)) { | |
380 | /* Socket must be connected */ | |
381 | if (sk->sk_state != BT_CONNECTED) | |
382 | return -EBADFD; | |
383 | ||
384 | dlc = rfcomm_pi(sk)->dlc; | |
385 | rfcomm_dlc_hold(dlc); | |
386 | } else { | |
387 | dlc = rfcomm_dlc_alloc(GFP_KERNEL); | |
388 | if (!dlc) | |
389 | return -ENOMEM; | |
390 | } | |
391 | ||
392 | id = rfcomm_dev_add(&req, dlc); | |
393 | if (id < 0) { | |
394 | rfcomm_dlc_put(dlc); | |
395 | return id; | |
396 | } | |
397 | ||
398 | if (req.flags & (1 << RFCOMM_REUSE_DLC)) { | |
399 | /* DLC is now used by device. | |
400 | * Socket must be disconnected */ | |
401 | sk->sk_state = BT_CLOSED; | |
402 | } | |
403 | ||
404 | return id; | |
405 | } | |
406 | ||
407 | static int rfcomm_release_dev(void __user *arg) | |
408 | { | |
409 | struct rfcomm_dev_req req; | |
410 | struct rfcomm_dev *dev; | |
411 | ||
412 | if (copy_from_user(&req, arg, sizeof(req))) | |
413 | return -EFAULT; | |
414 | ||
8de0a154 | 415 | BT_DBG("dev_id %d flags 0x%x", req.dev_id, req.flags); |
1da177e4 LT |
416 | |
417 | if (!(dev = rfcomm_dev_get(req.dev_id))) | |
418 | return -ENODEV; | |
419 | ||
420 | if (dev->flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN)) { | |
421 | rfcomm_dev_put(dev); | |
422 | return -EPERM; | |
423 | } | |
424 | ||
425 | if (req.flags & (1 << RFCOMM_HANGUP_NOW)) | |
426 | rfcomm_dlc_close(dev->dlc, 0); | |
427 | ||
84950cf0 MR |
428 | /* Shut down TTY synchronously before freeing rfcomm_dev */ |
429 | if (dev->tty) | |
430 | tty_vhangup(dev->tty); | |
431 | ||
93d80740 DY |
432 | if (!test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) |
433 | rfcomm_dev_del(dev); | |
1da177e4 LT |
434 | rfcomm_dev_put(dev); |
435 | return 0; | |
436 | } | |
437 | ||
438 | static int rfcomm_get_dev_list(void __user *arg) | |
439 | { | |
440 | struct rfcomm_dev_list_req *dl; | |
441 | struct rfcomm_dev_info *di; | |
442 | struct list_head *p; | |
443 | int n = 0, size, err; | |
444 | u16 dev_num; | |
445 | ||
446 | BT_DBG(""); | |
447 | ||
448 | if (get_user(dev_num, (u16 __user *) arg)) | |
449 | return -EFAULT; | |
450 | ||
451 | if (!dev_num || dev_num > (PAGE_SIZE * 4) / sizeof(*di)) | |
452 | return -EINVAL; | |
453 | ||
454 | size = sizeof(*dl) + dev_num * sizeof(*di); | |
455 | ||
456 | if (!(dl = kmalloc(size, GFP_KERNEL))) | |
457 | return -ENOMEM; | |
458 | ||
459 | di = dl->dev_info; | |
460 | ||
461 | read_lock_bh(&rfcomm_dev_lock); | |
462 | ||
463 | list_for_each(p, &rfcomm_dev_list) { | |
464 | struct rfcomm_dev *dev = list_entry(p, struct rfcomm_dev, list); | |
8de0a154 VT |
465 | if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) |
466 | continue; | |
1da177e4 LT |
467 | (di + n)->id = dev->id; |
468 | (di + n)->flags = dev->flags; | |
469 | (di + n)->state = dev->dlc->state; | |
470 | (di + n)->channel = dev->channel; | |
471 | bacpy(&(di + n)->src, &dev->src); | |
472 | bacpy(&(di + n)->dst, &dev->dst); | |
473 | if (++n >= dev_num) | |
474 | break; | |
475 | } | |
476 | ||
477 | read_unlock_bh(&rfcomm_dev_lock); | |
478 | ||
479 | dl->dev_num = n; | |
480 | size = sizeof(*dl) + n * sizeof(*di); | |
481 | ||
482 | err = copy_to_user(arg, dl, size); | |
483 | kfree(dl); | |
484 | ||
485 | return err ? -EFAULT : 0; | |
486 | } | |
487 | ||
488 | static int rfcomm_get_dev_info(void __user *arg) | |
489 | { | |
490 | struct rfcomm_dev *dev; | |
491 | struct rfcomm_dev_info di; | |
492 | int err = 0; | |
493 | ||
494 | BT_DBG(""); | |
495 | ||
496 | if (copy_from_user(&di, arg, sizeof(di))) | |
497 | return -EFAULT; | |
498 | ||
499 | if (!(dev = rfcomm_dev_get(di.id))) | |
500 | return -ENODEV; | |
501 | ||
502 | di.flags = dev->flags; | |
503 | di.channel = dev->channel; | |
504 | di.state = dev->dlc->state; | |
505 | bacpy(&di.src, &dev->src); | |
506 | bacpy(&di.dst, &dev->dst); | |
507 | ||
508 | if (copy_to_user(arg, &di, sizeof(di))) | |
509 | err = -EFAULT; | |
510 | ||
511 | rfcomm_dev_put(dev); | |
512 | return err; | |
513 | } | |
514 | ||
515 | int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) | |
516 | { | |
517 | BT_DBG("cmd %d arg %p", cmd, arg); | |
518 | ||
519 | switch (cmd) { | |
520 | case RFCOMMCREATEDEV: | |
521 | return rfcomm_create_dev(sk, arg); | |
522 | ||
523 | case RFCOMMRELEASEDEV: | |
524 | return rfcomm_release_dev(arg); | |
525 | ||
526 | case RFCOMMGETDEVLIST: | |
527 | return rfcomm_get_dev_list(arg); | |
528 | ||
529 | case RFCOMMGETDEVINFO: | |
530 | return rfcomm_get_dev_info(arg); | |
531 | } | |
532 | ||
533 | return -EINVAL; | |
534 | } | |
535 | ||
536 | /* ---- DLC callbacks ---- */ | |
537 | static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb) | |
538 | { | |
539 | struct rfcomm_dev *dev = dlc->owner; | |
540 | struct tty_struct *tty; | |
8e87d142 | 541 | |
1da177e4 LT |
542 | if (!dev || !(tty = dev->tty)) { |
543 | kfree_skb(skb); | |
544 | return; | |
545 | } | |
546 | ||
547 | BT_DBG("dlc %p tty %p len %d", dlc, tty, skb->len); | |
548 | ||
817d6d3b PF |
549 | tty_insert_flip_string(tty, skb->data, skb->len); |
550 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
551 | |
552 | kfree_skb(skb); | |
553 | } | |
554 | ||
555 | static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err) | |
556 | { | |
557 | struct rfcomm_dev *dev = dlc->owner; | |
558 | if (!dev) | |
559 | return; | |
8e87d142 | 560 | |
1da177e4 LT |
561 | BT_DBG("dlc %p dev %p err %d", dlc, dev, err); |
562 | ||
563 | dev->err = err; | |
564 | wake_up_interruptible(&dev->wait); | |
565 | ||
566 | if (dlc->state == BT_CLOSED) { | |
567 | if (!dev->tty) { | |
568 | if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) { | |
77f2a45f MH |
569 | if (rfcomm_dev_get(dev->id) == NULL) |
570 | return; | |
1da177e4 | 571 | |
77f2a45f | 572 | rfcomm_dev_del(dev); |
1da177e4 | 573 | rfcomm_dev_put(dev); |
1da177e4 | 574 | } |
8e87d142 | 575 | } else |
1da177e4 LT |
576 | tty_hangup(dev->tty); |
577 | } | |
578 | } | |
579 | ||
580 | static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig) | |
581 | { | |
582 | struct rfcomm_dev *dev = dlc->owner; | |
583 | if (!dev) | |
584 | return; |