]>
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 | ||
1da177e4 LT |
24 | /* |
25 | * Bluetooth RFCOMM core. | |
26 | * | |
27 | * $Id: core.c,v 1.42 2002/10/01 23:26:25 maxk Exp $ | |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/errno.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/sched.h> | |
34 | #include <linux/signal.h> | |
35 | #include <linux/init.h> | |
83144186 | 36 | #include <linux/freezer.h> |
1da177e4 | 37 | #include <linux/wait.h> |
be9d1227 | 38 | #include <linux/device.h> |
1da177e4 | 39 | #include <linux/net.h> |
4a3e2f71 AV |
40 | #include <linux/mutex.h> |
41 | ||
1da177e4 LT |
42 | #include <net/sock.h> |
43 | #include <asm/uaccess.h> | |
44 | #include <asm/unaligned.h> | |
45 | ||
46 | #include <net/bluetooth/bluetooth.h> | |
47 | #include <net/bluetooth/hci_core.h> | |
48 | #include <net/bluetooth/l2cap.h> | |
49 | #include <net/bluetooth/rfcomm.h> | |
50 | ||
1da177e4 LT |
51 | #ifndef CONFIG_BT_RFCOMM_DEBUG |
52 | #undef BT_DBG | |
53 | #define BT_DBG(D...) | |
54 | #endif | |
55 | ||
7c2660b0 | 56 | #define VERSION "1.8" |
56f3a40a | 57 | |
7c2660b0 | 58 | static int disable_cfc = 0; |
98bcd08b | 59 | static int channel_mtu = -1; |
56f3a40a MH |
60 | static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU; |
61 | ||
1da177e4 LT |
62 | static struct task_struct *rfcomm_thread; |
63 | ||
4a3e2f71 AV |
64 | static DEFINE_MUTEX(rfcomm_mutex); |
65 | #define rfcomm_lock() mutex_lock(&rfcomm_mutex) | |
66 | #define rfcomm_unlock() mutex_unlock(&rfcomm_mutex) | |
1da177e4 LT |
67 | |
68 | static unsigned long rfcomm_event; | |
69 | ||
70 | static LIST_HEAD(session_list); | |
71 | static atomic_t terminate, running; | |
72 | ||
73 | static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len); | |
74 | static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci); | |
75 | static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci); | |
76 | static int rfcomm_queue_disc(struct rfcomm_dlc *d); | |
77 | static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type); | |
78 | static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d); | |
79 | static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig); | |
80 | static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len); | |
81 | static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits); | |
82 | static void rfcomm_make_uih(struct sk_buff *skb, u8 addr); | |
83 | ||
84 | static void rfcomm_process_connect(struct rfcomm_session *s); | |
85 | ||
86 | static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, bdaddr_t *dst, int *err); | |
87 | static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst); | |
88 | static void rfcomm_session_del(struct rfcomm_session *s); | |
89 | ||
90 | /* ---- RFCOMM frame parsing macros ---- */ | |
91 | #define __get_dlci(b) ((b & 0xfc) >> 2) | |
92 | #define __get_channel(b) ((b & 0xf8) >> 3) | |
93 | #define __get_dir(b) ((b & 0x04) >> 2) | |
94 | #define __get_type(b) ((b & 0xef)) | |
95 | ||
96 | #define __test_ea(b) ((b & 0x01)) | |
97 | #define __test_cr(b) ((b & 0x02)) | |
98 | #define __test_pf(b) ((b & 0x10)) | |
99 | ||
100 | #define __addr(cr, dlci) (((dlci & 0x3f) << 2) | (cr << 1) | 0x01) | |
101 | #define __ctrl(type, pf) (((type & 0xef) | (pf << 4))) | |
102 | #define __dlci(dir, chn) (((chn & 0x1f) << 1) | dir) | |
103 | #define __srv_channel(dlci) (dlci >> 1) | |
104 | #define __dir(dlci) (dlci & 0x01) | |
105 | ||
106 | #define __len8(len) (((len) << 1) | 1) | |
107 | #define __len16(len) ((len) << 1) | |
108 | ||
109 | /* MCC macros */ | |
110 | #define __mcc_type(cr, type) (((type << 2) | (cr << 1) | 0x01)) | |
111 | #define __get_mcc_type(b) ((b & 0xfc) >> 2) | |
112 | #define __get_mcc_len(b) ((b & 0xfe) >> 1) | |
113 | ||
114 | /* RPN macros */ | |
3a5e903c | 115 | #define __rpn_line_settings(data, stop, parity) ((data & 0x3) | ((stop & 0x1) << 2) | ((parity & 0x7) << 3)) |
1da177e4 LT |
116 | #define __get_rpn_data_bits(line) ((line) & 0x3) |
117 | #define __get_rpn_stop_bits(line) (((line) >> 2) & 0x1) | |
3a5e903c | 118 | #define __get_rpn_parity(line) (((line) >> 3) & 0x7) |
1da177e4 LT |
119 | |
120 | static inline void rfcomm_schedule(uint event) | |
121 | { | |
122 | if (!rfcomm_thread) | |
123 | return; | |
124 | //set_bit(event, &rfcomm_event); | |
125 | set_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event); | |
126 | wake_up_process(rfcomm_thread); | |
127 | } | |
128 | ||
129 | static inline void rfcomm_session_put(struct rfcomm_session *s) | |
130 | { | |
131 | if (atomic_dec_and_test(&s->refcnt)) | |
132 | rfcomm_session_del(s); | |
133 | } | |
134 | ||
135 | /* ---- RFCOMM FCS computation ---- */ | |
136 | ||
408c1ce2 | 137 | /* reversed, 8-bit, poly=0x07 */ |
8e87d142 | 138 | static unsigned char rfcomm_crc_table[256] = { |
408c1ce2 MH |
139 | 0x00, 0x91, 0xe3, 0x72, 0x07, 0x96, 0xe4, 0x75, |
140 | 0x0e, 0x9f, 0xed, 0x7c, 0x09, 0x98, 0xea, 0x7b, | |
141 | 0x1c, 0x8d, 0xff, 0x6e, 0x1b, 0x8a, 0xf8, 0x69, | |
142 | 0x12, 0x83, 0xf1, 0x60, 0x15, 0x84, 0xf6, 0x67, | |
143 | ||
144 | 0x38, 0xa9, 0xdb, 0x4a, 0x3f, 0xae, 0xdc, 0x4d, | |
145 | 0x36, 0xa7, 0xd5, 0x44, 0x31, 0xa0, 0xd2, 0x43, | |
146 | 0x24, 0xb5, 0xc7, 0x56, 0x23, 0xb2, 0xc0, 0x51, | |
147 | 0x2a, 0xbb, 0xc9, 0x58, 0x2d, 0xbc, 0xce, 0x5f, | |
148 | ||
149 | 0x70, 0xe1, 0x93, 0x02, 0x77, 0xe6, 0x94, 0x05, | |
150 | 0x7e, 0xef, 0x9d, 0x0c, 0x79, 0xe8, 0x9a, 0x0b, | |
151 | 0x6c, 0xfd, 0x8f, 0x1e, 0x6b, 0xfa, 0x88, 0x19, | |
152 | 0x62, 0xf3, 0x81, 0x10, 0x65, 0xf4, 0x86, 0x17, | |
153 | ||
154 | 0x48, 0xd9, 0xab, 0x3a, 0x4f, 0xde, 0xac, 0x3d, | |
155 | 0x46, 0xd7, 0xa5, 0x34, 0x41, 0xd0, 0xa2, 0x33, | |
156 | 0x54, 0xc5, 0xb7, 0x26, 0x53, 0xc2, 0xb0, 0x21, | |
157 | 0x5a, 0xcb, 0xb9, 0x28, 0x5d, 0xcc, 0xbe, 0x2f, | |
158 | ||
159 | 0xe0, 0x71, 0x03, 0x92, 0xe7, 0x76, 0x04, 0x95, | |
160 | 0xee, 0x7f, 0x0d, 0x9c, 0xe9, 0x78, 0x0a, 0x9b, | |
161 | 0xfc, 0x6d, 0x1f, 0x8e, 0xfb, 0x6a, 0x18, 0x89, | |
162 | 0xf2, 0x63, 0x11, 0x80, 0xf5, 0x64, 0x16, 0x87, | |
163 | ||
164 | 0xd8, 0x49, 0x3b, 0xaa, 0xdf, 0x4e, 0x3c, 0xad, | |
165 | 0xd6, 0x47, 0x35, 0xa4, 0xd1, 0x40, 0x32, 0xa3, | |
166 | 0xc4, 0x55, 0x27, 0xb6, 0xc3, 0x52, 0x20, 0xb1, | |
167 | 0xca, 0x5b, 0x29, 0xb8, 0xcd, 0x5c, 0x2e, 0xbf, | |
168 | ||
169 | 0x90, 0x01, 0x73, 0xe2, 0x97, 0x06, 0x74, 0xe5, | |
170 | 0x9e, 0x0f, 0x7d, 0xec, 0x99, 0x08, 0x7a, 0xeb, | |
171 | 0x8c, 0x1d, 0x6f, 0xfe, 0x8b, 0x1a, 0x68, 0xf9, | |
172 | 0x82, 0x13, 0x61, 0xf0, 0x85, 0x14, 0x66, 0xf7, | |
173 | ||
174 | 0xa8, 0x39, 0x4b, 0xda, 0xaf, 0x3e, 0x4c, 0xdd, | |
175 | 0xa6, 0x37, 0x45, 0xd4, 0xa1, 0x30, 0x42, 0xd3, | |
176 | 0xb4, 0x25, 0x57, 0xc6, 0xb3, 0x22, 0x50, 0xc1, | |
177 | 0xba, 0x2b, 0x59, 0xc8, 0xbd, 0x2c, 0x5e, 0xcf | |
178 | }; | |
179 | ||
1da177e4 LT |
180 | /* CRC on 2 bytes */ |
181 | #define __crc(data) (rfcomm_crc_table[rfcomm_crc_table[0xff ^ data[0]] ^ data[1]]) | |
182 | ||
8e87d142 | 183 | /* FCS on 2 bytes */ |
1da177e4 LT |
184 | static inline u8 __fcs(u8 *data) |
185 | { | |
186 | return (0xff - __crc(data)); | |
187 | } | |
188 | ||
8e87d142 | 189 | /* FCS on 3 bytes */ |
1da177e4 LT |
190 | static inline u8 __fcs2(u8 *data) |
191 | { | |
192 | return (0xff - rfcomm_crc_table[__crc(data) ^ data[2]]); | |
193 | } | |
194 | ||
195 | /* Check FCS */ | |
196 | static inline int __check_fcs(u8 *data, int type, u8 fcs) | |
197 | { | |
198 | u8 f = __crc(data); | |
199 | ||
200 | if (type != RFCOMM_UIH) | |
201 | f = rfcomm_crc_table[f ^ data[2]]; | |
202 | ||
203 | return rfcomm_crc_table[f ^ fcs] != 0xcf; | |
204 | } | |
205 | ||
206 | /* ---- L2CAP callbacks ---- */ | |
207 | static void rfcomm_l2state_change(struct sock *sk) | |
208 | { | |
209 | BT_DBG("%p state %d", sk, sk->sk_state); | |
210 | rfcomm_schedule(RFCOMM_SCHED_STATE); | |
211 | } | |
212 | ||
213 | static void rfcomm_l2data_ready(struct sock *sk, int bytes) | |
214 | { | |
215 | BT_DBG("%p bytes %d", sk, bytes); | |
216 | rfcomm_schedule(RFCOMM_SCHED_RX); | |
217 | } | |
218 | ||
219 | static int rfcomm_l2sock_create(struct socket **sock) | |
220 | { | |
221 | int err; | |
222 | ||
223 | BT_DBG(""); | |
224 | ||
225 | err = sock_create_kern(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP, sock); | |
226 | if (!err) { | |
227 | struct sock *sk = (*sock)->sk; | |
228 | sk->sk_data_ready = rfcomm_l2data_ready; | |
229 | sk->sk_state_change = rfcomm_l2state_change; | |
230 | } | |
231 | return err; | |
232 | } | |
233 | ||
234 | /* ---- RFCOMM DLCs ---- */ | |
235 | static void rfcomm_dlc_timeout(unsigned long arg) | |
236 | { | |
237 | struct rfcomm_dlc *d = (void *) arg; | |
238 | ||
239 | BT_DBG("dlc %p state %ld", d, d->state); | |
240 | ||
241 | set_bit(RFCOMM_TIMED_OUT, &d->flags); | |
242 | rfcomm_dlc_put(d); | |
243 | rfcomm_schedule(RFCOMM_SCHED_TIMEO); | |
244 | } | |
245 | ||
246 | static void rfcomm_dlc_set_timer(struct rfcomm_dlc *d, long timeout) | |
247 | { | |
248 | BT_DBG("dlc %p state %ld timeout %ld", d, d->state, timeout); | |
249 | ||
250 | if (!mod_timer(&d->timer, jiffies + timeout)) | |
251 | rfcomm_dlc_hold(d); | |
252 | } | |
253 | ||
254 | static void rfcomm_dlc_clear_timer(struct rfcomm_dlc *d) | |
255 | { | |
256 | BT_DBG("dlc %p state %ld", d, d->state); | |
257 | ||
258 | if (timer_pending(&d->timer) && del_timer(&d->timer)) | |
259 | rfcomm_dlc_put(d); | |
260 | } | |
261 | ||
262 | static void rfcomm_dlc_clear_state(struct rfcomm_dlc *d) | |
263 | { | |
264 | BT_DBG("%p", d); | |
265 | ||
266 | d->state = BT_OPEN; | |
267 | d->flags = 0; | |
268 | d->mscex = 0; | |
269 | d->mtu = RFCOMM_DEFAULT_MTU; | |
270 | d->v24_sig = RFCOMM_V24_RTC | RFCOMM_V24_RTR | RFCOMM_V24_DV; | |
271 | ||
272 | d->cfc = RFCOMM_CFC_DISABLED; | |
273 | d->rx_credits = RFCOMM_DEFAULT_CREDITS; | |
274 | } | |
275 | ||
dd0fc66f | 276 | struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio) |
1da177e4 | 277 | { |
25ea6db0 MH |
278 | struct rfcomm_dlc *d = kzalloc(sizeof(*d), prio); |
279 | ||
1da177e4 LT |
280 | if (!d) |
281 | return NULL; | |
1da177e4 LT |
282 | |
283 | init_timer(&d->timer); | |
284 | d->timer.function = rfcomm_dlc_timeout; | |
285 | d->timer.data = (unsigned long) d; | |
286 | ||
287 | skb_queue_head_init(&d->tx_queue); | |
288 | spin_lock_init(&d->lock); | |
289 | atomic_set(&d->refcnt, 1); | |
290 | ||
291 | rfcomm_dlc_clear_state(d); | |
8e87d142 | 292 | |
1da177e4 | 293 | BT_DBG("%p", d); |
25ea6db0 | 294 | |
1da177e4 LT |
295 | return d; |
296 | } | |
297 | ||
298 | void rfcomm_dlc_free(struct rfcomm_dlc *d) | |
299 | { | |
300 | BT_DBG("%p", d); | |
301 | ||
302 | skb_queue_purge(&d->tx_queue); | |
303 | kfree(d); | |
304 | } | |
305 | ||
306 | static void rfcomm_dlc_link(struct rfcomm_session *s, struct rfcomm_dlc *d) | |
307 | { | |
308 | BT_DBG("dlc %p session %p", d, s); | |
309 | ||
310 | rfcomm_session_hold(s); | |
311 | ||
312 | rfcomm_dlc_hold(d); | |
313 | list_add(&d->list, &s->dlcs); | |
314 | d->session = s; | |
315 | } | |
316 | ||
317 | static void rfcomm_dlc_unlink(struct rfcomm_dlc *d) | |
318 | { | |
319 | struct rfcomm_session *s = d->session; | |
320 | ||
321 | BT_DBG("dlc %p refcnt %d session %p", d, atomic_read(&d->refcnt), s); | |
322 | ||
323 | list_del(&d->list); | |
324 | d->session = NULL; | |
325 | rfcomm_dlc_put(d); | |
326 | ||
327 | rfcomm_session_put(s); | |
328 | } | |
329 | ||
330 | static struct rfcomm_dlc *rfcomm_dlc_get(struct rfcomm_session *s, u8 dlci) | |
331 | { | |
332 | struct rfcomm_dlc *d; | |
333 | struct list_head *p; | |
334 | ||
335 | list_for_each(p, &s->dlcs) { | |
336 | d = list_entry(p, struct rfcomm_dlc, list); | |
337 | if (d->dlci == dlci) | |
338 | return d; | |
339 | } | |
340 | return NULL; | |
341 | } | |
342 | ||
343 | static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) | |
344 | { | |
345 | struct rfcomm_session *s; | |
346 | int err = 0; | |
347 | u8 dlci; | |
348 | ||
8e87d142 | 349 | BT_DBG("dlc %p state %ld %s %s channel %d", |
1da177e4 LT |
350 | d, d->state, batostr(src), batostr(dst), channel); |
351 | ||
352 | if (channel < 1 || channel > 30) | |
353 | return -EINVAL; | |
354 | ||
355 | if (d->state != BT_OPEN && d->state != BT_CLOSED) | |
356 | return 0; | |
357 | ||
358 | s = rfcomm_session_get(src, dst); | |
359 | if (!s) { | |
360 | s = rfcomm_session_create(src, dst, &err); | |
361 | if (!s) | |
362 | return err; | |
363 | } | |
364 | ||
365 | dlci = __dlci(!s->initiator, channel); | |
366 | ||
367 | /* Check if DLCI already exists */ | |
368 | if (rfcomm_dlc_get(s, dlci)) | |
369 | return -EBUSY; | |
370 | ||
371 | rfcomm_dlc_clear_state(d); | |
372 | ||
373 | d->dlci = dlci; | |
374 | d->addr = __addr(s->initiator, dlci); | |
375 | d->priority = 7; | |
376 | ||
377 | d->state = BT_CONFIG; | |
378 | rfcomm_dlc_link(s, d); | |
379 | ||
380 | d->mtu = s->mtu; | |
381 | d->cfc = (s->cfc == RFCOMM_CFC_UNKNOWN) ? 0 : s->cfc; | |
382 | ||
383 | if (s->state == BT_CONNECTED) | |
384 | rfcomm_send_pn(s, 1, d); | |
385 | rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT); | |
386 | return 0; | |
387 | } | |
388 | ||
389 | int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) | |
390 | { | |
391 | int r; | |
392 | ||
393 | rfcomm_lock(); | |
394 | ||
395 | r = __rfcomm_dlc_open(d, src, dst, channel); | |
396 | ||
397 | rfcomm_unlock(); | |
398 | return r; | |
399 | } | |
400 | ||
401 | static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err) | |
402 | { | |
403 | struct rfcomm_session *s = d->session; | |
404 | if (!s) | |
405 | return 0; | |
406 | ||
407 | BT_DBG("dlc %p state %ld dlci %d err %d session %p", | |
408 | d, d->state, d->dlci, err, s); | |
409 | ||
410 | switch (d->state) { | |
411 | case BT_CONNECTED: | |
412 | case BT_CONFIG: | |
413 | case BT_CONNECT: | |
414 | d->state = BT_DISCONN; | |
415 | if (skb_queue_empty(&d->tx_queue)) { | |
416 | rfcomm_send_disc(s, d->dlci); | |
417 | rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT); | |
418 | } else { | |
419 | rfcomm_queue_disc(d); | |
420 | rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT * 2); | |
421 | } | |
422 | break; | |
423 | ||
424 | default: | |
425 | rfcomm_dlc_clear_timer(d); | |
426 | ||
427 | rfcomm_dlc_lock(d); | |
428 | d->state = BT_CLOSED; | |
429 | d->state_change(d, err); | |
430 | rfcomm_dlc_unlock(d); | |
431 | ||
432 | skb_queue_purge(&d->tx_queue); | |
1da177e4 LT |
433 | rfcomm_dlc_unlink(d); |
434 | } | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | int rfcomm_dlc_close(struct rfcomm_dlc *d, int err) | |
440 | { | |
441 | int r; | |
442 | ||
443 | rfcomm_lock(); | |
444 | ||
445 | r = __rfcomm_dlc_close(d, err); | |
446 | ||
447 | rfcomm_unlock(); | |
448 | return r; | |
449 | } | |
450 | ||
451 | int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb) | |
452 | { | |
453 | int len = skb->len; | |
454 | ||
455 | if (d->state != BT_CONNECTED) | |
456 | return -ENOTCONN; | |
457 | ||
458 | BT_DBG("dlc %p mtu %d len %d", d, d->mtu, len); | |
459 | ||
460 | if (len > d->mtu) | |
461 | return -EINVAL; | |
462 | ||
463 | rfcomm_make_uih(skb, d->addr); | |
464 | skb_queue_tail(&d->tx_queue, skb); | |
465 | ||
466 | if (!test_bit(RFCOMM_TX_THROTTLED, &d->flags)) | |
467 | rfcomm_schedule(RFCOMM_SCHED_TX); | |
468 | return len; | |
469 | } | |
470 | ||
471 | void fastcall __rfcomm_dlc_throttle(struct rfcomm_dlc *d) | |
472 | { | |
473 | BT_DBG("dlc %p state %ld", d, d->state); | |
474 | ||
475 | if (!d->cfc) { | |
476 | d->v24_sig |= RFCOMM_V24_FC; | |
477 | set_bit(RFCOMM_MSC_PENDING, &d->flags); | |
478 | } | |
479 | rfcomm_schedule(RFCOMM_SCHED_TX); | |
480 | } | |
481 | ||
482 | void fastcall __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d) | |
483 | { | |
484 | BT_DBG("dlc %p state %ld", d, d->state); | |
485 | ||
486 | if (!d->cfc) { | |
487 | d->v24_sig &= ~RFCOMM_V24_FC; | |
488 | set_bit(RFCOMM_MSC_PENDING, &d->flags); | |
489 | } | |
490 | rfcomm_schedule(RFCOMM_SCHED_TX); | |
491 | } | |
492 | ||
8e87d142 | 493 | /* |
1da177e4 LT |
494 | Set/get modem status functions use _local_ status i.e. what we report |
495 | to the other side. | |
496 | Remote status is provided by dlc->modem_status() callback. | |
497 | */ | |
498 | int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig) | |
499 | { | |
8e87d142 | 500 | BT_DBG("dlc %p state %ld v24_sig 0x%x", |
1da177e4 LT |
501 | d, d->state, v24_sig); |
502 | ||
503 | if (test_bit(RFCOMM_RX_THROTTLED, &d->flags)) | |
504 | v24_sig |= RFCOMM_V24_FC; | |
505 | else | |
506 | v24_sig &= ~RFCOMM_V24_FC; | |
8e87d142 | 507 | |
1da177e4 LT |
508 | d->v24_sig = v24_sig; |
509 | ||
510 | if (!test_and_set_bit(RFCOMM_MSC_PENDING, &d->flags)) | |
511 | rfcomm_schedule(RFCOMM_SCHED_TX); | |
512 | ||
513 | return 0; | |
514 | } | |
515 | ||
516 | int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig) | |
517 | { | |
8e87d142 | 518 | BT_DBG("dlc %p state %ld v24_sig 0x%x", |
1da177e4 LT |
519 | d, d->state, d->v24_sig); |
520 | ||
521 | *v24_sig = d->v24_sig; | |
522 | return 0; | |
523 | } | |
524 | ||
525 | /* ---- RFCOMM sessions ---- */ | |
526 | static struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state) | |
527 | { | |
25ea6db0 MH |
528 | struct rfcomm_session *s = kzalloc(sizeof(*s), GFP_KERNEL); |
529 | ||
1da177e4 LT |
530 | if (!s) |
531 | return NULL; | |
1da177e4 LT |
532 | |
533 | BT_DBG("session %p sock %p", s, sock); | |
534 | ||
535 | INIT_LIST_HEAD(&s->dlcs); | |
536 | s->state = state; | |
537 | s->sock = sock; | |
538 | ||
539 | s->mtu = RFCOMM_DEFAULT_MTU; | |
7c2660b0 | 540 | s->cfc = disable_cfc ? RFCOMM_CFC_DISABLED : RFCOMM_CFC_UNKNOWN; |
1da177e4 LT |
541 | |
542 | /* Do not increment module usage count for listening sessions. | |
543 | * Otherwise we won't be able to unload the module. */ | |
544 | if (state != BT_LISTEN) | |
545 | if (!try_module_get(THIS_MODULE)) { | |
546 | kfree(s); | |
547 | return NULL; | |
548 | } | |
549 | ||
550 | list_add(&s->list, &session_list); | |
551 | ||
552 | return s; | |
553 | } | |
554 | ||
555 | static void rfcomm_session_del(struct rfcomm_session *s) | |
556 | { | |
557 | int state = s->state; | |
558 | ||
559 | BT_DBG("session %p state %ld", s, s->state); | |
560 | ||
561 | list_del(&s->list); | |
562 | ||
563 | if (state == BT_CONNECTED) | |
564 | rfcomm_send_disc(s, 0); | |
565 | ||
566 | sock_release(s->sock); | |
567 | kfree(s); | |
568 | ||
569 | if (state != BT_LISTEN) | |
570 | module_put(THIS_MODULE); | |
571 | } | |
572 | ||
573 | static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst) | |
574 | { | |
575 | struct rfcomm_session *s; | |
576 | struct list_head *p, *n; | |
577 | struct bt_sock *sk; | |
578 | list_for_each_safe(p, n, &session_list) { | |
579 | s = list_entry(p, struct rfcomm_session, list); | |
8e87d142 | 580 | sk = bt_sk(s->sock->sk); |
1da177e4 LT |
581 | |
582 | if ((!bacmp(src, BDADDR_ANY) || !bacmp(&sk->src, src)) && | |
583 | !bacmp(&sk->dst, dst)) | |
584 | return s; | |
585 | } | |
586 | return NULL; | |
587 | } | |
588 | ||
589 | static void rfcomm_session_close(struct rfcomm_session *s, int err) | |
590 | { | |
591 | struct rfcomm_dlc *d; | |
592 | struct list_head *p, *n; | |
593 | ||
594 | BT_DBG("session %p state %ld err %d", s, s->state, err); | |
595 | ||
596 | rfcomm_session_hold(s); | |
597 | ||
598 | s->state = BT_CLOSED; | |
599 | ||
600 | /* Close all dlcs */ | |
601 | list_for_each_safe(p, n, &s->dlcs) { | |
602 | d = list_entry(p, struct rfcomm_dlc, list); | |
603 | d->state = BT_CLOSED; | |
604 | __rfcomm_dlc_close(d, err); | |
605 | } | |
606 | ||
607 | rfcomm_session_put(s); | |
608 | } | |
609 | ||
610 | static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, bdaddr_t *dst, int *err) | |
611 | { | |
612 | struct rfcomm_session *s = NULL; | |
613 | struct sockaddr_l2 addr; | |
614 | struct socket *sock; | |
615 | struct sock *sk; | |
616 | ||
617 | BT_DBG("%s %s", batostr(src), batostr(dst)); | |
618 | ||
619 | *err = rfcomm_l2sock_create(&sock); | |
620 | if (*err < 0) | |
621 | return NULL; | |
622 | ||
623 | bacpy(&addr.l2_bdaddr, src); | |
624 | addr.l2_family = AF_BLUETOOTH; | |
625 | addr.l2_psm = 0; | |
48db9ca4 | 626 | *err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); |
1da177e4 LT |
627 | if (*err < 0) |
628 | goto failed; | |
629 | ||
630 | /* Set L2CAP options */ | |
631 | sk = sock->sk; | |
632 | lock_sock(sk); | |
56f3a40a | 633 | l2cap_pi(sk)->imtu = l2cap_mtu; |
1da177e4 LT |
634 | release_sock(sk); |
635 | ||
636 | s = rfcomm_session_add(sock, BT_BOUND); | |
637 | if (!s) { | |
638 | *err = -ENOMEM; | |
639 | goto failed; | |
640 | } | |
641 | ||
1da177e4 LT |
642 | s->initiator = 1; |
643 | ||
644 | bacpy(&addr.l2_bdaddr, dst); | |
645 | addr.l2_family = AF_BLUETOOTH; | |
646 | addr.l2_psm = htobs(RFCOMM_PSM); | |
48db9ca4 | 647 | *err = kernel_connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK); |
b4c612a4 | 648 | if (*err == 0 || *err == -EINPROGRESS) |
1da177e4 LT |
649 | return s; |
650 | ||
651 | rfcomm_session_del(s); | |
652 | return NULL; | |
653 | ||
654 | failed: | |
655 | sock_release(sock); | |
656 | return NULL; | |
657 | } | |
658 | ||
659 | void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst) | |
660 | { | |
661 | struct sock *sk = s->sock->sk; | |
662 | if (src) | |
663 | bacpy(src, &bt_sk(sk)->src); | |
664 | if (dst) | |
665 | bacpy(dst, &bt_sk(sk)->dst); | |
666 | } | |
667 | ||
668 | /* ---- RFCOMM frame sending ---- */ | |
669 | static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len) | |
670 | { | |
671 | struct socket *sock = s->sock; | |
672 | struct kvec iv = { data, len }; | |
673 | struct msghdr msg; | |
674 | ||
675 | BT_DBG("session %p len %d", s, len); | |
676 | ||
677 | memset(&msg, 0, sizeof(msg)); | |
678 | ||
679 | return kernel_sendmsg(sock, &msg, &iv, 1, len); | |
680 | } | |
681 | ||
682 | static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci) | |
683 | { | |
684 | struct rfcomm_cmd cmd; | |
685 | ||
686 | BT_DBG("%p dlci %d", s, dlci); | |
687 | ||
688 | cmd.addr = __addr(s->initiator, dlci); | |
689 | cmd.ctrl = __ctrl(RFCOMM_SABM, 1); | |
690 | cmd.len = __len8(0); | |
691 | cmd.fcs = __fcs2((u8 *) &cmd); | |
692 | ||
693 | return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd)); | |
694 | } | |
695 | ||
696 | static int rfcomm_send_ua(struct rfcomm_session *s, u8 dlci) | |
697 | { | |
698 | struct rfcomm_cmd cmd; | |
699 | ||
700 | BT_DBG("%p dlci %d", s, dlci); | |
701 | ||
702 | cmd.addr = __addr(!s->initiator, dlci); | |
703 | cmd.ctrl = __ctrl(RFCOMM_UA, 1); | |
704 | cmd.len = __len8(0); | |
705 | cmd.fcs = __fcs2((u8 *) &cmd); | |
706 | ||
707 | return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd)); | |
708 | } | |
709 | ||
710 | static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci) | |
711 | { | |
712 | struct rfcomm_cmd cmd; | |
713 | ||
714 | BT_DBG("%p dlci %d", s, dlci); | |
715 | ||
716 | cmd.addr = __addr(s->initiator, dlci); | |
717 | cmd.ctrl = __ctrl(RFCOMM_DISC, 1); | |
718 | cmd.len = __len8(0); | |
719 | cmd.fcs = __fcs2((u8 *) &cmd); | |
720 | ||
721 | return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd)); | |
722 | } | |
723 | ||
724 | static int rfcomm_queue_disc(struct rfcomm_dlc *d) | |
725 | { | |
726 | struct rfcomm_cmd *cmd; | |
727 | struct sk_buff *skb; | |
728 | ||
729 | BT_DBG("dlc %p dlci %d", d, d->dlci); | |
730 | ||
731 | skb = alloc_skb(sizeof(*cmd), GFP_KERNEL); | |
732 | if (!skb) | |
733 | return -ENOMEM; | |
734 | ||
735 | cmd = (void *) __skb_put(skb, sizeof(*cmd)); | |
736 | cmd->addr = d->addr; | |
737 | cmd->ctrl = __ctrl(RFCOMM_DISC, 1); | |
738 | cmd->len = __len8(0); | |
739 | cmd->fcs = __fcs2((u8 *) cmd); | |
740 | ||
741 | skb_queue_tail(&d->tx_queue, skb); | |
742 | rfcomm_schedule(RFCOMM_SCHED_TX); | |
743 | return 0; | |
744 | } | |
745 | ||
746 | static int rfcomm_send_dm(struct rfcomm_session *s, u8 dlci) | |
747 | { | |
748 | struct rfcomm_cmd cmd; | |
749 | ||
750 | BT_DBG("%p dlci %d", s, dlci); | |
751 | ||
752 | cmd.addr = __addr(!s->initiator, dlci); | |
753 | cmd.ctrl = __ctrl(RFCOMM_DM, 1); | |
754 | cmd.len = __len8(0); | |
755 | cmd.fcs = __fcs2((u8 *) &cmd); | |
756 | ||
757 | return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd)); | |
758 | } | |
759 | ||
760 | static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type) | |
761 | { | |
762 | struct rfcomm_hdr *hdr; | |
763 | struct rfcomm_mcc *mcc; | |
764 | u8 buf[16], *ptr = buf; | |
765 | ||
766 | BT_DBG("%p cr %d type %d", s, cr, type); | |
767 | ||
768 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
769 | hdr->addr = __addr(s->initiator, 0); | |
770 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
771 | hdr->len = __len8(sizeof(*mcc) + 1); | |
772 | ||
773 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
774 | mcc->type = __mcc_type(cr, RFCOMM_NSC); | |
775 | mcc->len = __len8(1); | |
776 | ||
777 | /* Type that we didn't like */ | |
778 | *ptr = __mcc_type(cr, type); ptr++; | |
779 | ||
780 | *ptr = __fcs(buf); ptr++; | |
781 | ||
782 | return rfcomm_send_frame(s, buf, ptr - buf); | |
783 | } | |
784 | ||
785 | static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d) | |
786 | { | |
787 | struct rfcomm_hdr *hdr; | |
788 | struct rfcomm_mcc *mcc; | |
789 | struct rfcomm_pn *pn; | |
790 | u8 buf[16], *ptr = buf; | |
791 | ||
792 | BT_DBG("%p cr %d dlci %d mtu %d", s, cr, d->dlci, d->mtu); | |
793 | ||
794 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
795 | hdr->addr = __addr(s->initiator, 0); | |
796 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
797 | hdr->len = __len8(sizeof(*mcc) + sizeof(*pn)); | |
798 | ||
799 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
800 | mcc->type = __mcc_type(cr, RFCOMM_PN); | |
801 | mcc->len = __len8(sizeof(*pn)); | |
802 | ||
803 | pn = (void *) ptr; ptr += sizeof(*pn); | |
804 | pn->dlci = d->dlci; | |
805 | pn->priority = d->priority; | |
806 | pn->ack_timer = 0; | |
807 | pn->max_retrans = 0; | |
808 | ||
809 | if (s->cfc) { | |
810 | pn->flow_ctrl = cr ? 0xf0 : 0xe0; | |
811 | pn->credits = RFCOMM_DEFAULT_CREDITS; | |
812 | } else { | |
813 | pn->flow_ctrl = 0; | |
814 | pn->credits = 0; | |
815 | } | |
816 | ||
98bcd08b MH |
817 | if (cr && channel_mtu >= 0) |
818 | pn->mtu = htobs(channel_mtu); | |
819 | else | |
820 | pn->mtu = htobs(d->mtu); | |
1da177e4 LT |
821 | |
822 | *ptr = __fcs(buf); ptr++; | |
823 | ||
824 | return rfcomm_send_frame(s, buf, ptr - buf); | |
825 | } | |
826 | ||
3a5e903c S |
827 | int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci, |
828 | u8 bit_rate, u8 data_bits, u8 stop_bits, | |
8e87d142 | 829 | u8 parity, u8 flow_ctrl_settings, |
3a5e903c | 830 | u8 xon_char, u8 xoff_char, u16 param_mask) |
1da177e4 LT |
831 | { |
832 | struct rfcomm_hdr *hdr; | |
833 | struct rfcomm_mcc *mcc; | |
834 | struct rfcomm_rpn *rpn; | |
835 | u8 buf[16], *ptr = buf; | |
836 | ||
837 | BT_DBG("%p cr %d dlci %d bit_r 0x%x data_b 0x%x stop_b 0x%x parity 0x%x" | |
8e87d142 YH |
838 | " flwc_s 0x%x xon_c 0x%x xoff_c 0x%x p_mask 0x%x", |
839 | s, cr, dlci, bit_rate, data_bits, stop_bits, parity, | |
3a5e903c | 840 | flow_ctrl_settings, xon_char, xoff_char, param_mask); |
1da177e4 LT |
841 | |
842 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
843 | hdr->addr = __addr(s->initiator, 0); | |
844 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
845 | hdr->len = __len8(sizeof(*mcc) + sizeof(*rpn)); | |
846 | ||
847 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
848 | mcc->type = __mcc_type(cr, RFCOMM_RPN); | |
849 | mcc->len = __len8(sizeof(*rpn)); | |
850 | ||
851 | rpn = (void *) ptr; ptr += sizeof(*rpn); | |
852 | rpn->dlci = __addr(1, dlci); | |
853 | rpn->bit_rate = bit_rate; | |
854 | rpn->line_settings = __rpn_line_settings(data_bits, stop_bits, parity); | |
855 | rpn->flow_ctrl = flow_ctrl_settings; | |
856 | rpn->xon_char = xon_char; | |
857 | rpn->xoff_char = xoff_char; | |
e8db8c99 | 858 | rpn->param_mask = cpu_to_le16(param_mask); |
1da177e4 LT |
859 | |
860 | *ptr = __fcs(buf); ptr++; | |
861 | ||
862 | return rfcomm_send_frame(s, buf, ptr - buf); | |
863 | } | |
864 | ||
865 | static int rfcomm_send_rls(struct rfcomm_session *s, int cr, u8 dlci, u8 status) | |
866 | { | |
867 | struct rfcomm_hdr *hdr; | |
868 | struct rfcomm_mcc *mcc; | |
869 | struct rfcomm_rls *rls; | |
870 | u8 buf[16], *ptr = buf; | |
871 | ||
872 | BT_DBG("%p cr %d status 0x%x", s, cr, status); | |
873 | ||
874 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
875 | hdr->addr = __addr(s->initiator, 0); | |
876 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
877 | hdr->len = __len8(sizeof(*mcc) + sizeof(*rls)); | |
878 | ||
879 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
880 | mcc->type = __mcc_type(cr, RFCOMM_RLS); | |
881 | mcc->len = __len8(sizeof(*rls)); | |
882 | ||
883 | rls = (void *) ptr; ptr += sizeof(*rls); | |
884 | rls->dlci = __addr(1, dlci); | |
885 | rls->status = status; | |
886 | ||
887 | *ptr = __fcs(buf); ptr++; | |
888 | ||
889 | return rfcomm_send_frame(s, buf, ptr - buf); | |
890 | } | |
891 | ||
892 | static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig) | |
893 | { | |
894 | struct rfcomm_hdr *hdr; | |
895 | struct rfcomm_mcc *mcc; | |
896 | struct rfcomm_msc *msc; | |
897 | u8 buf[16], *ptr = buf; | |
898 | ||
899 | BT_DBG("%p cr %d v24 0x%x", s, cr, v24_sig); | |
900 | ||
901 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
902 | hdr->addr = __addr(s->initiator, 0); | |
903 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
904 | hdr->len = __len8(sizeof(*mcc) + sizeof(*msc)); | |
905 | ||
906 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
907 | mcc->type = __mcc_type(cr, RFCOMM_MSC); | |
908 | mcc->len = __len8(sizeof(*msc)); | |
909 | ||
910 | msc = (void *) ptr; ptr += sizeof(*msc); | |
911 | msc->dlci = __addr(1, dlci); | |
912 | msc->v24_sig = v24_sig | 0x01; | |
913 | ||
914 | *ptr = __fcs(buf); ptr++; | |
915 | ||
916 | return rfcomm_send_frame(s, buf, ptr - buf); | |
917 | } | |
918 | ||
919 | static int rfcomm_send_fcoff(struct rfcomm_session *s, int cr) | |
920 | { | |
921 | struct rfcomm_hdr *hdr; | |
922 | struct rfcomm_mcc *mcc; | |
923 | u8 buf[16], *ptr = buf; | |
924 | ||
925 | BT_DBG("%p cr %d", s, cr); | |
926 | ||
927 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
928 | hdr->addr = __addr(s->initiator, 0); | |
929 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
930 | hdr->len = __len8(sizeof(*mcc)); | |
931 | ||
932 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
933 | mcc->type = __mcc_type(cr, RFCOMM_FCOFF); | |
934 | mcc->len = __len8(0); | |
935 | ||
936 | *ptr = __fcs(buf); ptr++; | |
937 | ||
938 | return rfcomm_send_frame(s, buf, ptr - buf); | |
939 | } | |
940 | ||
941 | static int rfcomm_send_fcon(struct rfcomm_session *s, int cr) | |
942 | { | |
943 | struct rfcomm_hdr *hdr; | |
944 | struct rfcomm_mcc *mcc; | |
945 | u8 buf[16], *ptr = buf; | |
946 | ||
947 | BT_DBG("%p cr %d", s, cr); | |
948 | ||
949 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
950 | hdr->addr = __addr(s->initiator, 0); | |
951 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
952 | hdr->len = __len8(sizeof(*mcc)); | |
953 | ||
954 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
955 | mcc->type = __mcc_type(cr, RFCOMM_FCON); | |
956 | mcc->len = __len8(0); | |
957 | ||
958 | *ptr = __fcs(buf); ptr++; | |
959 | ||
960 | return rfcomm_send_frame(s, buf, ptr - buf); | |
961 | } | |
962 | ||
963 | static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len) | |
964 | { | |
965 | struct socket *sock = s->sock; | |
966 | struct kvec iv[3]; | |
967 | struct msghdr msg; | |
968 | unsigned char hdr[5], crc[1]; | |
969 | ||
970 | if (len > 125) | |
971 | return -EINVAL; | |
972 | ||
973 | BT_DBG("%p cr %d", s, cr); | |
974 | ||
975 | hdr[0] = __addr(s->initiator, 0); | |
976 | hdr[1] = __ctrl(RFCOMM_UIH, 0); | |
977 | hdr[2] = 0x01 | ((len + 2) << 1); | |
978 | hdr[3] = 0x01 | ((cr & 0x01) << 1) | (RFCOMM_TEST << 2); | |
979 | hdr[4] = 0x01 | (len << 1); | |
980 | ||
981 | crc[0] = __fcs(hdr); | |
982 | ||
983 | iv[0].iov_base = hdr; | |
984 | iv[0].iov_len = 5; | |
985 | iv[1].iov_base = pattern; | |
986 | iv[1].iov_len = len; | |
987 | iv[2].iov_base = crc; | |
988 | iv[2].iov_len = 1; | |
989 | ||
990 | memset(&msg, 0, sizeof(msg)); | |
991 | ||
992 | return kernel_sendmsg(sock, &msg, iv, 3, 6 + len); | |
993 | } | |
994 | ||
995 | static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits) | |
996 | { | |
997 | struct rfcomm_hdr *hdr; | |
998 | u8 buf[16], *ptr = buf; | |
999 | ||
1000 | BT_DBG("%p addr %d credits %d", s, addr, credits); | |
1001 | ||
1002 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1003 | hdr->addr = addr; | |
1004 | hdr->ctrl = __ctrl(RFCOMM_UIH, 1); | |
1005 | hdr->len = __len8(0); | |
1006 | ||
1007 | *ptr = credits; ptr++; | |
1008 | ||
1009 | *ptr = __fcs(buf); ptr++; | |
1010 | ||
1011 | return rfcomm_send_frame(s, buf, ptr - buf); | |
1012 | } | |
1013 | ||
1014 | static void rfcomm_make_uih(struct sk_buff *skb, u8 addr) | |
1015 | { | |
1016 | struct rfcomm_hdr *hdr; | |
1017 | int len = skb->len; | |
1018 | u8 *crc; | |
1019 | ||
1020 | if (len > 127) { | |
1021 | hdr = (void *) skb_push(skb, 4); | |
6ba9c755 | 1022 | put_unaligned(htobs(__len16(len)), (__le16 *) &hdr->len); |
1da177e4 LT |
1023 | } else { |
1024 | hdr = (void *) skb_push(skb, 3); | |
1025 | hdr->len = __len8(len); | |
1026 | } | |
1027 | hdr->addr = addr; | |
1028 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1029 | ||
1030 | crc = skb_put(skb, 1); | |
1031 | *crc = __fcs((void *) hdr); | |
1032 | } | |
1033 | ||
1034 | /* ---- RFCOMM frame reception ---- */ | |
1035 | static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci) | |
1036 | { | |
1037 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1038 | ||
1039 | if (dlci) { | |
1040 | /* Data channel */ | |
1041 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1042 | if (!d) { | |
1043 | rfcomm_send_dm(s, dlci); | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | switch (d->state) { | |
1048 | case BT_CONNECT: | |
1049 | rfcomm_dlc_clear_timer(d); | |
1050 | ||
1051 | rfcomm_dlc_lock(d); | |
1052 | d->state = BT_CONNECTED; | |
1053 | d->state_change(d, 0); | |
1054 | rfcomm_dlc_unlock(d); | |
1055 | ||
1056 | rfcomm_send_msc(s, 1, dlci, d->v24_sig); | |
1057 | break; | |
1058 | ||
1059 | case BT_DISCONN: | |
1060 | d->state = BT_CLOSED; | |
1061 | __rfcomm_dlc_close(d, 0); | |
9cf5b0ea MH |
1062 | |
1063 | if (list_empty(&s->dlcs)) { | |
1064 | s->state = BT_DISCONN; | |
1065 | rfcomm_send_disc(s, 0); | |
1066 | } | |
1067 | ||
1da177e4 LT |
1068 | break; |
1069 | } | |
1070 | } else { | |
1071 | /* Control channel */ | |
1072 | switch (s->state) { | |
1073 | case BT_CONNECT: | |
1074 | s->state = BT_CONNECTED; | |
1075 | rfcomm_process_connect(s); | |
1076 | break; | |
9cf5b0ea MH |
1077 | |
1078 | case BT_DISCONN: | |
1079 | rfcomm_session_put(s); | |
1080 | break; | |
1da177e4 LT |
1081 | } |
1082 | } | |
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | static int rfcomm_recv_dm(struct rfcomm_session *s, u8 dlci) | |
1087 | { | |
1088 | int err = 0; | |
1089 | ||
1090 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1091 | ||
1092 | if (dlci) { | |
1093 | /* Data DLC */ | |
1094 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1095 | if (d) { | |
1096 | if (d->state == BT_CONNECT || d->state == BT_CONFIG) | |
1097 | err = ECONNREFUSED; | |
1098 | else | |
1099 | err = ECONNRESET; | |
1100 | ||
1101 | d->state = BT_CLOSED; | |
1102 | __rfcomm_dlc_close(d, err); | |
1103 | } | |
1104 | } else { | |
1105 | if (s->state == BT_CONNECT) | |
1106 | err = ECONNREFUSED; | |
1107 | else | |
1108 | err = ECONNRESET; | |
1109 | ||
1110 | s->state = BT_CLOSED; | |
1111 | rfcomm_session_close(s, err); | |
1112 | } | |
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | static int rfcomm_recv_disc(struct rfcomm_session *s, u8 dlci) | |
1117 | { | |
1118 | int err = 0; | |
1119 | ||
1120 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1121 | ||
1122 | if (dlci) { | |
1123 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1124 | if (d) { | |
1125 | rfcomm_send_ua(s, dlci); | |
1126 | ||
1127 | if (d->state == BT_CONNECT || d->state == BT_CONFIG) | |
1128 | err = ECONNREFUSED; | |
1129 | else | |
1130 | err = ECONNRESET; | |
1131 | ||
1132 | d->state = BT_CLOSED; | |
1133 | __rfcomm_dlc_close(d, err); | |
8e87d142 | 1134 | } else |
1da177e4 | 1135 | rfcomm_send_dm(s, dlci); |
8e87d142 | 1136 | |
1da177e4 LT |
1137 | } else { |
1138 | rfcomm_send_ua(s, 0); | |
1139 | ||
1140 | if (s->state == BT_CONNECT) | |
1141 | err = ECONNREFUSED; | |
1142 | else | |
1143 | err = ECONNRESET; | |
1144 | ||
1145 | s->state = BT_CLOSED; | |
1146 | rfcomm_session_close(s, err); | |
1147 | } | |
1148 | ||
1149 | return 0; | |
1150 | } | |
1151 | ||
1152 | static inline int rfcomm_check_link_mode(struct rfcomm_dlc *d) | |
1153 | { | |
1154 | struct sock *sk = d->session->sock->sk; | |
1155 | ||
1156 | if (d->link_mode & (RFCOMM_LM_ENCRYPT | RFCOMM_LM_SECURE)) { | |
1157 | if (!hci_conn_encrypt(l2cap_pi(sk)->conn->hcon)) | |
1158 | return 1; | |
1159 | } else if (d->link_mode & RFCOMM_LM_AUTH) { | |
1160 | if (!hci_conn_auth(l2cap_pi(sk)->conn->hcon)) | |
1161 | return 1; | |
1162 | } | |
1163 | ||
1164 | return 0; | |
1165 | } | |
1166 | ||
1167 | static void rfcomm_dlc_accept(struct rfcomm_dlc *d) | |
1168 | { | |
300b9397 MH |
1169 | struct sock *sk = d->session->sock->sk; |
1170 | ||
1da177e4 LT |
1171 | BT_DBG("dlc %p", d); |
1172 | ||
1173 | rfcomm_send_ua(d->session, d->dlci); | |
1174 | ||
1175 | rfcomm_dlc_lock(d); | |
1176 | d->state = BT_CONNECTED; | |
1177 | d->state_change(d, 0); | |
1178 | rfcomm_dlc_unlock(d); | |
1179 | ||
300b9397 MH |
1180 | if (d->link_mode & RFCOMM_LM_MASTER) |
1181 | hci_conn_switch_role(l2cap_pi(sk)->conn->hcon, 0x00); | |
1182 | ||
1da177e4 LT |
1183 | rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); |
1184 | } | |
1185 | ||
1186 | static int rfcomm_recv_sabm(struct rfcomm_session *s, u8 dlci) | |
1187 | { | |
1188 | struct rfcomm_dlc *d; | |
1189 | u8 channel; | |
1190 | ||
1191 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1192 | ||
1193 | if (!dlci) { | |
1194 | rfcomm_send_ua(s, 0); | |
1195 | ||
1196 | if (s->state == BT_OPEN) { | |
1197 | s->state = BT_CONNECTED; | |
1198 | rfcomm_process_connect(s); | |
1199 | } | |
1200 | return 0; | |
1201 | } | |
1202 | ||
1203 | /* Check if DLC exists */ | |
1204 | d = rfcomm_dlc_get(s, dlci); | |
1205 | if (d) { | |
1206 | if (d->state == BT_OPEN) { | |
1207 | /* DLC was previously opened by PN request */ | |
1208 | if (rfcomm_check_link_mode(d)) { | |
1209 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); | |
1210 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | rfcomm_dlc_accept(d); | |
1215 | } | |
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | /* Notify socket layer about incoming connection */ | |
1220 | channel = __srv_channel(dlci); | |
1221 | if (rfcomm_connect_ind(s, channel, &d)) { | |
1222 | d->dlci = dlci; | |
1223 | d->addr = __addr(s->initiator, dlci); | |
1224 | rfcomm_dlc_link(s, d); | |
1225 | ||
1226 | if (rfcomm_check_link_mode(d)) { | |
1227 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); | |
1228 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
1229 | return 0; | |
1230 | } | |
1231 | ||
1232 | rfcomm_dlc_accept(d); | |
1233 | } else { | |
1234 | rfcomm_send_dm(s, dlci); | |
1235 | } | |
1236 | ||
1237 | return 0; | |
1238 | } | |
1239 | ||
1240 | static int rfcomm_apply_pn(struct rfcomm_dlc *d, int cr, struct rfcomm_pn *pn) | |
1241 | { | |
1242 | struct rfcomm_session *s = d->session; | |
1243 | ||
8e87d142 | 1244 | BT_DBG("dlc %p state %ld dlci %d mtu %d fc 0x%x credits %d", |
1da177e4 LT |
1245 | d, d->state, d->dlci, pn->mtu, pn->flow_ctrl, pn->credits); |
1246 | ||
7c2660b0 MH |
1247 | if ((pn->flow_ctrl == 0xf0 && s->cfc != RFCOMM_CFC_DISABLED) || |
1248 | pn->flow_ctrl == 0xe0) { | |
1249 | d->cfc = RFCOMM_CFC_ENABLED; | |
1da177e4 LT |
1250 | d->tx_credits = pn->credits; |
1251 | } else { | |
7c2660b0 | 1252 | d->cfc = RFCOMM_CFC_DISABLED; |
1da177e4 LT |
1253 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); |
1254 | } | |
1255 | ||
7c2660b0 MH |
1256 | if (s->cfc == RFCOMM_CFC_UNKNOWN) |
1257 | s->cfc = d->cfc; | |
1258 | ||
1da177e4 LT |
1259 | d->priority = pn->priority; |
1260 | ||
98bcd08b MH |
1261 | d->mtu = btohs(pn->mtu); |
1262 | ||
1263 | if (cr && d->mtu > s->mtu) | |
1264 | d->mtu = s->mtu; | |
1da177e4 LT |
1265 | |
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | static int rfcomm_recv_pn(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1270 | { | |
1271 | struct rfcomm_pn *pn = (void *) skb->data; | |
1272 | struct rfcomm_dlc *d; | |
1273 | u8 dlci = pn->dlci; | |
1274 | ||
1275 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1276 | ||
1277 | if (!dlci) | |
1278 | return 0; | |
1279 | ||
1280 | d = rfcomm_dlc_get(s, dlci); | |
1281 | if (d) { | |
1282 | if (cr) { | |
1283 | /* PN request */ | |
1284 | rfcomm_apply_pn(d, cr, pn); | |
1285 | rfcomm_send_pn(s, 0, d); | |
1286 | } else { | |
1287 | /* PN response */ | |
1288 | switch (d->state) { | |
1289 | case BT_CONFIG: | |
1290 | rfcomm_apply_pn(d, cr, pn); | |
1291 | ||
1292 | d->state = BT_CONNECT; | |
1293 | rfcomm_send_sabm(s, d->dlci); | |
1294 | break; | |
1295 | } | |
1296 | } | |
1297 | } else { | |
1298 | u8 channel = __srv_channel(dlci); | |
1299 | ||
1300 | if (!cr) | |
1301 | return 0; | |
1302 | ||
1303 | /* PN request for non existing DLC. | |
1304 | * Assume incoming connection. */ | |
1305 | if (rfcomm_connect_ind(s, channel, &d)) { | |
1306 | d->dlci = dlci; | |
1307 | d->addr = __addr(s->initiator, dlci); | |
1308 | rfcomm_dlc_link(s, d); | |
1309 | ||
1310 | rfcomm_apply_pn(d, cr, pn); | |
1311 | ||
1312 | d->state = BT_OPEN; | |
1313 | rfcomm_send_pn(s, 0, d); | |
1314 | } else { | |
1315 | rfcomm_send_dm(s, dlci); | |
1316 | } | |
1317 | } | |
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_buff *skb) | |
1322 | { | |
1323 | struct rfcomm_rpn *rpn = (void *) skb->data; | |
1324 | u8 dlci = __get_dlci(rpn->dlci); | |
1325 | ||
1326 | u8 bit_rate = 0; | |
1327 | u8 data_bits = 0; | |
1328 | u8 stop_bits = 0; | |
1329 | u8 parity = 0; | |
1330 | u8 flow_ctrl = 0; | |
1331 | u8 xon_char = 0; | |
1332 | u8 xoff_char = 0; | |
1333 | u16 rpn_mask = RFCOMM_RPN_PM_ALL; | |
3a5e903c S |
1334 | |
1335 | BT_DBG("dlci %d cr %d len 0x%x bitr 0x%x line 0x%x flow 0x%x xonc 0x%x xoffc 0x%x pm 0x%x", | |
1336 | dlci, cr, len, rpn->bit_rate, rpn->line_settings, rpn->flow_ctrl, | |
1337 | rpn->xon_char, rpn->xoff_char, rpn->param_mask); | |
1338 | ||
1339 | if (!cr) | |
1da177e4 | 1340 | return 0; |
3a5e903c | 1341 | |
1da177e4 | 1342 | if (len == 1) { |
3a5e903c | 1343 | /* This is a request, return default settings */ |
1da177e4 LT |
1344 | bit_rate = RFCOMM_RPN_BR_115200; |
1345 | data_bits = RFCOMM_RPN_DATA_8; | |
1346 | stop_bits = RFCOMM_RPN_STOP_1; | |
1347 | parity = RFCOMM_RPN_PARITY_NONE; | |
1348 | flow_ctrl = RFCOMM_RPN_FLOW_NONE; | |
1349 | xon_char = RFCOMM_RPN_XON_CHAR; | |
1350 | xoff_char = RFCOMM_RPN_XOFF_CHAR; | |
1da177e4 LT |
1351 | goto rpn_out; |
1352 | } | |
3a5e903c S |
1353 | |
1354 | /* Check for sane values, ignore/accept bit_rate, 8 bits, 1 stop bit, | |
1355 | * no parity, no flow control lines, normal XON/XOFF chars */ | |
1356 | ||
e8db8c99 | 1357 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_BITRATE)) { |
1da177e4 LT |
1358 | bit_rate = rpn->bit_rate; |
1359 | if (bit_rate != RFCOMM_RPN_BR_115200) { | |
1360 | BT_DBG("RPN bit rate mismatch 0x%x", bit_rate); | |
1361 | bit_rate = RFCOMM_RPN_BR_115200; | |
1362 | rpn_mask ^= RFCOMM_RPN_PM_BITRATE; | |
1363 | } | |
1364 | } | |
3a5e903c | 1365 | |
e8db8c99 | 1366 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_DATA)) { |
1da177e4 LT |
1367 | data_bits = __get_rpn_data_bits(rpn->line_settings); |
1368 | if (data_bits != RFCOMM_RPN_DATA_8) { | |
1369 | BT_DBG("RPN data bits mismatch 0x%x", data_bits); | |
1370 | data_bits = RFCOMM_RPN_DATA_8; | |
1371 | rpn_mask ^= RFCOMM_RPN_PM_DATA; | |
1372 | } | |
1373 | } | |
3a5e903c | 1374 | |
e8db8c99 | 1375 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_STOP)) { |
1da177e4 LT |
1376 | stop_bits = __get_rpn_stop_bits(rpn->line_settings); |
1377 | if (stop_bits != RFCOMM_RPN_STOP_1) { | |
1378 | BT_DBG("RPN stop bits mismatch 0x%x", stop_bits); | |
1379 | stop_bits = RFCOMM_RPN_STOP_1; | |
1380 | rpn_mask ^= RFCOMM_RPN_PM_STOP; | |
1381 | } | |
1382 | } | |
3a5e903c | 1383 | |
e8db8c99 | 1384 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_PARITY)) { |
1da177e4 LT |
1385 | parity = __get_rpn_parity(rpn->line_settings); |
1386 | if (parity != RFCOMM_RPN_PARITY_NONE) { | |
1387 | BT_DBG("RPN parity mismatch 0x%x", parity); | |
1388 | parity = RFCOMM_RPN_PARITY_NONE; | |
1389 | rpn_mask ^= RFCOMM_RPN_PM_PARITY; | |
1390 | } | |
1391 | } | |
3a5e903c | 1392 | |
e8db8c99 | 1393 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_FLOW)) { |
1da177e4 LT |
1394 | flow_ctrl = rpn->flow_ctrl; |
1395 | if (flow_ctrl != RFCOMM_RPN_FLOW_NONE) { | |
1396 | BT_DBG("RPN flow ctrl mismatch 0x%x", flow_ctrl); | |
1397 | flow_ctrl = RFCOMM_RPN_FLOW_NONE; | |
1398 | rpn_mask ^= RFCOMM_RPN_PM_FLOW; | |
1399 | } | |
1400 | } | |
3a5e903c | 1401 | |
e8db8c99 | 1402 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XON)) { |
1da177e4 LT |
1403 | xon_char = rpn->xon_char; |
1404 | if (xon_char != RFCOMM_RPN_XON_CHAR) { | |
1405 | BT_DBG("RPN XON char mismatch 0x%x", xon_char); | |
1406 | xon_char = RFCOMM_RPN_XON_CHAR; | |
1407 | rpn_mask ^= RFCOMM_RPN_PM_XON; | |
1408 | } | |
1409 | } | |
3a5e903c | 1410 | |
e8db8c99 | 1411 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XOFF)) { |
1da177e4 LT |
1412 | xoff_char = rpn->xoff_char; |
1413 | if (xoff_char != RFCOMM_RPN_XOFF_CHAR) { | |
1414 | BT_DBG("RPN XOFF char mismatch 0x%x", xoff_char); | |
1415 | xoff_char = RFCOMM_RPN_XOFF_CHAR; | |
1416 | rpn_mask ^= RFCOMM_RPN_PM_XOFF; | |
1417 | } | |
1418 | } | |
1419 | ||
1420 | rpn_out: | |
3a5e903c S |
1421 | rfcomm_send_rpn(s, 0, dlci, bit_rate, data_bits, stop_bits, |
1422 | parity, flow_ctrl, xon_char, xoff_char, rpn_mask); | |
1da177e4 LT |
1423 | |
1424 | return 0; | |
1425 | } | |
1426 | ||
1427 | static int rfcomm_recv_rls(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1428 | { | |
1429 | struct rfcomm_rls *rls = (void *) skb->data; | |
1430 | u8 dlci = __get_dlci(rls->dlci); | |
1431 | ||
1432 | BT_DBG("dlci %d cr %d status 0x%x", dlci, cr, rls->status); | |
3a5e903c | 1433 | |
1da177e4 LT |
1434 | if (!cr) |
1435 | return 0; | |
1436 | ||
3a5e903c S |
1437 | /* We should probably do something with this information here. But |
1438 | * for now it's sufficient just to reply -- Bluetooth 1.1 says it's | |
1439 | * mandatory to recognise and respond to RLS */ | |
1da177e4 LT |
1440 | |
1441 | rfcomm_send_rls(s, 0, dlci, rls->status); | |
1442 | ||
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1447 | { | |
1448 | struct rfcomm_msc *msc = (void *) skb->data; | |
1449 | struct rfcomm_dlc *d; | |
1450 | u8 dlci = __get_dlci(msc->dlci); | |
1451 | ||
1452 | BT_DBG("dlci %d cr %d v24 0x%x", dlci, cr, msc->v24_sig); | |
1453 | ||
1454 | d = rfcomm_dlc_get(s, dlci); | |
3a5e903c | 1455 | if (!d) |
1da177e4 LT |
1456 | return 0; |
1457 | ||
1458 | if (cr) { | |
1459 | if (msc->v24_sig & RFCOMM_V24_FC && !d->cfc) | |
1460 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1461 | else | |
1462 | clear_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
3a5e903c | 1463 | |
1da177e4 LT |
1464 | rfcomm_dlc_lock(d); |
1465 | if (d->modem_status) | |
1466 | d->modem_status(d, msc->v24_sig); | |
1467 | rfcomm_dlc_unlock(d); | |
8e87d142 | 1468 | |
1da177e4 LT |
1469 | rfcomm_send_msc(s, 0, dlci, msc->v24_sig); |
1470 | ||
1471 | d->mscex |= RFCOMM_MSCEX_RX; | |
3a5e903c | 1472 | } else |
1da177e4 LT |
1473 | d->mscex |= RFCOMM_MSCEX_TX; |
1474 | ||
1475 | return 0; | |
1476 | } | |
1477 | ||
1478 | static int rfcomm_recv_mcc(struct rfcomm_session *s, struct sk_buff *skb) | |
1479 | { | |
1480 | struct rfcomm_mcc *mcc = (void *) skb->data; | |
1481 | u8 type, cr, len; | |
1482 | ||
1483 | cr = __test_cr(mcc->type); | |
1484 | type = __get_mcc_type(mcc->type); | |
1485 | len = __get_mcc_len(mcc->len); | |
1486 | ||
1487 | BT_DBG("%p type 0x%x cr %d", s, type, cr); | |
1488 | ||
1489 | skb_pull(skb, 2); | |
1490 | ||
1491 | switch (type) { | |
1492 | case RFCOMM_PN: | |
1493 | rfcomm_recv_pn(s, cr, skb); | |
1494 | break; | |
1495 | ||
1496 | case RFCOMM_RPN: | |
1497 | rfcomm_recv_rpn(s, cr, len, skb); | |
1498 | break; | |
1499 | ||
1500 | case RFCOMM_RLS: | |
1501 | rfcomm_recv_rls(s, cr, skb); | |
1502 | break; | |
1503 | ||
1504 | case RFCOMM_MSC: | |
1505 | rfcomm_recv_msc(s, cr, skb); | |
1506 | break; | |
1507 | ||
1508 | case RFCOMM_FCOFF: | |
1509 | if (cr) { | |
1510 | set_bit(RFCOMM_TX_THROTTLED, &s->flags); | |
1511 | rfcomm_send_fcoff(s, 0); | |
1512 | } | |
1513 | break; | |
1514 | ||
1515 | case RFCOMM_FCON: | |
1516 | if (cr) { | |
1517 | clear_bit(RFCOMM_TX_THROTTLED, &s->flags); | |
1518 | rfcomm_send_fcon(s, 0); | |
1519 | } | |
1520 | break; | |
1521 | ||
1522 | case RFCOMM_TEST: | |
1523 | if (cr) | |
1524 | rfcomm_send_test(s, 0, skb->data, skb->len); | |
1525 | break; | |
1526 | ||
1527 | case RFCOMM_NSC: | |
1528 | break; | |
1529 | ||
1530 | default: | |
1531 | BT_ERR("Unknown control type 0x%02x", type); | |
1532 | rfcomm_send_nsc(s, cr, type); | |
1533 | break; | |
1534 | } | |
1535 | return 0; | |
1536 | } | |
1537 | ||
1538 | static int rfcomm_recv_data(struct rfcomm_session *s, u8 dlci, int pf, struct sk_buff *skb) | |
1539 | { | |
1540 | struct rfcomm_dlc *d; | |
1541 | ||
1542 | BT_DBG("session %p state %ld dlci %d pf %d", s, s->state, dlci, pf); | |
1543 | ||
1544 | d = rfcomm_dlc_get(s, dlci); | |
1545 | if (!d) { | |
1546 | rfcomm_send_dm(s, dlci); | |
1547 | goto drop; | |
1548 | } | |
1549 | ||
1550 | if (pf && d->cfc) { | |
1551 | u8 credits = *(u8 *) skb->data; skb_pull(skb, 1); | |
1552 | ||
1553 | d->tx_credits += credits; | |
1554 | if (d->tx_credits) | |
1555 | clear_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1556 | } | |
1557 | ||
1558 | if (skb->len && d->state == BT_CONNECTED) { | |
1559 | rfcomm_dlc_lock(d); | |
1560 | d->rx_credits--; | |
1561 | d->data_ready(d, skb); | |
1562 | rfcomm_dlc_unlock(d); | |
1563 | return 0; | |
1564 | } | |
1565 | ||
1566 | drop: | |
1567 | kfree_skb(skb); | |
1568 | return 0; | |
1569 | } | |
1570 | ||
1571 | static int rfcomm_recv_frame(struct rfcomm_session *s, struct sk_buff *skb) | |
1572 | { | |
1573 | struct rfcomm_hdr *hdr = (void *) skb->data; | |
1574 | u8 type, dlci, fcs; | |
1575 | ||
1576 | dlci = __get_dlci(hdr->addr); | |
1577 | type = __get_type(hdr->ctrl); | |
1578 | ||
1579 | /* Trim FCS */ | |
1580 | skb->len--; skb->tail--; | |
27a884dc | 1581 | fcs = *(u8 *)skb_tail_pointer(skb); |
1da177e4 LT |
1582 | |
1583 | if (__check_fcs(skb->data, type, fcs)) { | |
1584 | BT_ERR("bad checksum in packet"); | |
1585 | kfree_skb(skb); | |
1586 | return -EILSEQ; | |
1587 | } | |
1588 | ||
1589 | if (__test_ea(hdr->len)) | |
1590 | skb_pull(skb, 3); | |
1591 | else | |
1592 | skb_pull(skb, 4); | |
1593 | ||
1594 | switch (type) { | |
1595 | case RFCOMM_SABM: | |
1596 | if (__test_pf(hdr->ctrl)) | |
1597 | rfcomm_recv_sabm(s, dlci); | |
1598 | break; | |
1599 | ||
1600 | case RFCOMM_DISC: | |
1601 | if (__test_pf(hdr->ctrl)) | |
1602 | rfcomm_recv_disc(s, dlci); | |
1603 | break; | |
1604 | ||
1605 | case RFCOMM_UA: | |
1606 | if (__test_pf(hdr->ctrl)) | |
1607 | rfcomm_recv_ua(s, dlci); | |
1608 | break; | |
1609 | ||
1610 | case RFCOMM_DM: | |
1611 | rfcomm_recv_dm(s, dlci); | |
1612 | break; | |
1613 | ||
1614 | case RFCOMM_UIH: | |
1615 | if (dlci) | |
1616 | return rfcomm_recv_data(s, dlci, __test_pf(hdr->ctrl), skb); | |
1617 | ||
1618 | rfcomm_recv_mcc(s, skb); | |
1619 | break; | |
1620 | ||
1621 | default: | |
1622 | BT_ERR("Unknown packet type 0x%02x\n", type); | |
1623 | break; | |
1624 | } | |
1625 | kfree_skb(skb); | |
1626 | return 0; | |
1627 | } | |
1628 | ||
1629 | /* ---- Connection and data processing ---- */ | |
1630 | ||
1631 | static void rfcomm_process_connect(struct rfcomm_session *s) | |
1632 | { | |
1633 | struct rfcomm_dlc *d; | |
1634 | struct list_head *p, *n; | |
1635 | ||
1636 | BT_DBG("session %p state %ld", s, s->state); | |
1637 | ||
1638 | list_for_each_safe(p, n, &s->dlcs) { | |
1639 | d = list_entry(p, struct rfcomm_dlc, list); | |
1640 | if (d->state == BT_CONFIG) { | |
1641 | d->mtu = s->mtu; | |
1642 | rfcomm_send_pn(s, 1, d); | |
1643 | } | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | /* Send data queued for the DLC. | |
1648 | * Return number of frames left in the queue. | |
1649 | */ | |
1650 | static inline int rfcomm_process_tx(struct rfcomm_dlc *d) | |
1651 | { | |
1652 | struct sk_buff *skb; | |
1653 | int err; | |
1654 | ||
8e87d142 | 1655 | BT_DBG("dlc %p state %ld cfc %d rx_credits %d tx_credits %d", |
1da177e4 LT |
1656 | d, d->state, d->cfc, d->rx_credits, d->tx_credits); |
1657 | ||
1658 | /* Send pending MSC */ | |
1659 | if (test_and_clear_bit(RFCOMM_MSC_PENDING, &d->flags)) | |
8e87d142 | 1660 | rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); |
1da177e4 LT |
1661 | |
1662 | if (d->cfc) { | |
8e87d142 | 1663 | /* CFC enabled. |
1da177e4 LT |
1664 | * Give them some credits */ |
1665 | if (!test_bit(RFCOMM_RX_THROTTLED, &d->flags) && | |
8e87d142 | 1666 | d->rx_credits <= (d->cfc >> 2)) { |
1da177e4 LT |
1667 | rfcomm_send_credits(d->session, d->addr, d->cfc - d->rx_credits); |
1668 | d->rx_credits = d->cfc; | |
1669 | } | |
1670 | } else { | |
1671 | /* CFC disabled. | |
1672 | * Give ourselves some credits */ | |
1673 | d->tx_credits = 5; | |
1674 | } | |
1675 | ||
1676 | if (test_bit(RFCOMM_TX_THROTTLED, &d->flags)) | |
1677 | return skb_queue_len(&d->tx_queue); | |
1678 | ||
1679 | while (d->tx_credits && (skb = skb_dequeue(&d->tx_queue))) { | |
1680 | err = rfcomm_send_frame(d->session, skb->data, skb->len); | |
1681 | if (err < 0) { | |
1682 | skb_queue_head(&d->tx_queue, skb); | |
1683 | break; | |
1684 | } | |
1685 | kfree_skb(skb); | |
1686 | d->tx_credits--; | |
1687 | } | |
1688 | ||
1689 | if (d->cfc && !d->tx_credits) { | |
1690 | /* We're out of TX credits. | |
1691 | * Set TX_THROTTLED flag to avoid unnesary wakeups by dlc_send. */ | |
1692 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1693 | } | |
1694 | ||
1695 | return skb_queue_len(&d->tx_queue); | |
1696 | } | |
1697 | ||
1698 | static inline void rfcomm_process_dlcs(struct rfcomm_session *s) | |
1699 | { | |
1700 | struct rfcomm_dlc *d; | |
1701 | struct list_head *p, *n; | |
1702 | ||
1703 | BT_DBG("session %p state %ld", s, s->state); | |
1704 | ||
1705 | list_for_each_safe(p, n, &s->dlcs) { | |
1706 | d = list_entry(p, struct rfcomm_dlc, list); | |
1707 | ||
1708 | if (test_bit(RFCOMM_TIMED_OUT, &d->flags)) { | |
1709 | __rfcomm_dlc_close(d, ETIMEDOUT); | |
1710 | continue; | |
1711 | } | |
1712 | ||
1713 | if (test_and_clear_bit(RFCOMM_AUTH_ACCEPT, &d->flags)) { | |
1714 | rfcomm_dlc_clear_timer(d); | |
1715 | rfcomm_dlc_accept(d); | |
1716 | if (d->link_mode & RFCOMM_LM_SECURE) { | |
1717 | struct sock *sk = s->sock->sk; | |
1718 | hci_conn_change_link_key(l2cap_pi(sk)->conn->hcon); | |
1719 | } | |
1720 | continue; | |
1721 | } else if (test_and_clear_bit(RFCOMM_AUTH_REJECT, &d->flags)) { | |
1722 | rfcomm_dlc_clear_timer(d); | |
1723 | rfcomm_send_dm(s, d->dlci); | |
1724 | __rfcomm_dlc_close(d, ECONNREFUSED); | |
1725 | continue; | |
1726 | } | |
1727 | ||
1728 | if (test_bit(RFCOMM_TX_THROTTLED, &s->flags)) | |
1729 | continue; | |
1730 | ||
1731 | if ((d->state == BT_CONNECTED || d->state == BT_DISCONN) && | |
1732 | d->mscex == RFCOMM_MSCEX_OK) | |
1733 | rfcomm_process_tx(d); | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | static inline void rfcomm_process_rx(struct rfcomm_session *s) | |
1738 | { | |
1739 | struct socket *sock = s->sock; | |
1740 | struct sock *sk = sock->sk; | |
1741 | struct sk_buff *skb; | |
1742 | ||
1743 | BT_DBG("session %p state %ld qlen %d", s, s->state, skb_queue_len(&sk->sk_receive_queue)); | |
1744 | ||
1745 | /* Get data directly from socket receive queue without copying it. */ | |
1746 | while ((skb = skb_dequeue(&sk->sk_receive_queue))) { | |
1747 | skb_orphan(skb); | |
1748 | rfcomm_recv_frame(s, skb); | |
1749 | } | |
1750 | ||
1751 | if (sk->sk_state == BT_CLOSED) { | |
1752 | if (!s->initiator) | |
1753 | rfcomm_session_put(s); | |
1754 | ||
1755 | rfcomm_session_close(s, sk->sk_err); | |
1756 | } | |
1757 | } | |
1758 | ||
1759 | static inline void rfcomm_accept_connection(struct rfcomm_session *s) | |
1760 | { | |
1761 | struct socket *sock = s->sock, *nsock; | |
1762 | int err; | |
1763 | ||
1764 | /* Fast check for a new connection. | |
1765 | * Avoids unnesesary socket allocations. */ | |
1766 | if (list_empty(&bt_sk(sock->sk)->accept_q)) | |
1767 | return; | |
1768 | ||
1769 | BT_DBG("session %p", s); | |
1770 | ||
48db9ca4 MH |
1771 | err = kernel_accept(sock, &nsock, O_NONBLOCK); |
1772 | if (err < 0) | |
1da177e4 LT |
1773 | return; |
1774 | ||
1da177e4 LT |
1775 | __module_get(nsock->ops->owner); |
1776 | ||
1da177e4 LT |
1777 | /* Set our callbacks */ |
1778 | nsock->sk->sk_data_ready = rfcomm_l2data_ready; | |
1779 | nsock->sk->sk_state_change = rfcomm_l2state_change; | |
1780 | ||
1781 | s = rfcomm_session_add(nsock, BT_OPEN); | |
1782 | if (s) { | |
1783 | rfcomm_session_hold(s); | |
98bcd08b MH |
1784 | |
1785 | /* We should adjust MTU on incoming sessions. | |
1786 | * L2CAP MTU minus UIH header and FCS. */ | |
1787 | s->mtu = min(l2cap_pi(nsock->sk)->omtu, l2cap_pi(nsock->sk)->imtu) - 5; | |
1788 | ||
1da177e4 LT |
1789 | rfcomm_schedule(RFCOMM_SCHED_RX); |
1790 | } else | |
1791 | sock_release(nsock); | |
1792 | } | |
1793 | ||
1794 | static inline void rfcomm_check_connection(struct rfcomm_session *s) | |
1795 | { | |
1796 | struct sock *sk = s->sock->sk; | |
1797 | ||
1798 | BT_DBG("%p state %ld", s, s->state); | |
1799 | ||
1800 | switch(sk->sk_state) { | |
1801 | case BT_CONNECTED: | |
1802 | s->state = BT_CONNECT; | |
1803 | ||
1804 | /* We can adjust MTU on outgoing sessions. | |
1805 | * L2CAP MTU minus UIH header and FCS. */ | |
1806 | s->mtu = min(l2cap_pi(sk)->omtu, l2cap_pi(sk)->imtu) - 5; | |
1807 | ||
1808 | rfcomm_send_sabm(s, 0); | |
1809 | break; | |
1810 | ||
1811 | case BT_CLOSED: | |
1812 | s->state = BT_CLOSED; | |
1813 | rfcomm_session_close(s, sk->sk_err); | |
1814 | break; | |
1815 | } | |
1816 | } | |
1817 | ||
1818 | static inline void rfcomm_process_sessions(void) | |
1819 | { | |
1820 | struct list_head *p, *n; | |
1821 | ||
1822 | rfcomm_lock(); | |
1823 | ||
1824 | list_for_each_safe(p, n, &session_list) { | |
1825 | struct rfcomm_session *s; | |
1826 | s = list_entry(p, struct rfcomm_session, list); | |
1827 | ||
1828 | if (s->state == BT_LISTEN) { | |
1829 | rfcomm_accept_connection(s); | |
1830 | continue; | |
1831 | } | |
1832 | ||
1833 | rfcomm_session_hold(s); | |
1834 | ||
1835 | switch (s->state) { | |
1836 | case BT_BOUND: | |
1837 | rfcomm_check_connection(s); | |
1838 | break; | |
1839 | ||
1840 | default: | |
1841 | rfcomm_process_rx(s); | |
1842 | break; | |
1843 | } | |
1844 | ||
1845 | rfcomm_process_dlcs(s); | |
1846 | ||
1847 | rfcomm_session_put(s); | |
1848 | } | |
1849 | ||
1850 | rfcomm_unlock(); | |
1851 | } | |
1852 | ||
1853 | static void rfcomm_worker(void) | |
1854 | { | |
1855 | BT_DBG(""); | |
1856 | ||
1857 | while (!atomic_read(&terminate)) { | |
74da9d88 | 1858 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 LT |
1859 | if (!test_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event)) { |
1860 | /* No pending events. Let's sleep. | |
1861 | * Incoming connections and data will wake us up. */ | |
1da177e4 LT |
1862 | schedule(); |
1863 | } | |
74da9d88 | 1864 | set_current_state(TASK_RUNNING); |
1da177e4 LT |
1865 | |
1866 | /* Process stuff */ | |
1867 | clear_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event); | |
1868 | rfcomm_process_sessions(); | |
1869 | } | |
1da177e4 LT |
1870 | return; |
1871 | } | |
1872 | ||
1873 | static int rfcomm_add_listener(bdaddr_t *ba) | |
1874 | { | |
1875 | struct sockaddr_l2 addr; | |
1876 | struct socket *sock; | |
1877 | struct sock *sk; | |
1878 | struct rfcomm_session *s; | |
1879 | int err = 0; | |
1880 | ||
1881 | /* Create socket */ | |
1882 | err = rfcomm_l2sock_create(&sock); | |
8e87d142 | 1883 | if (err < 0) { |
1da177e4 LT |
1884 | BT_ERR("Create socket failed %d", err); |
1885 | return err; | |
1886 | } | |
1887 | ||
1888 | /* Bind socket */ | |
1889 | bacpy(&addr.l2_bdaddr, ba); | |
1890 | addr.l2_family = AF_BLUETOOTH; | |
1891 | addr.l2_psm = htobs(RFCOMM_PSM); | |
48db9ca4 | 1892 | err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); |
1da177e4 LT |
1893 | if (err < 0) { |
1894 | BT_ERR("Bind failed %d", err); | |
1895 | goto failed; | |
1896 | } | |
1897 | ||
1898 | /* Set L2CAP options */ | |
1899 | sk = sock->sk; | |
1900 | lock_sock(sk); | |
56f3a40a | 1901 | l2cap_pi(sk)->imtu = l2cap_mtu; |
1da177e4 LT |
1902 | release_sock(sk); |
1903 | ||
1904 | /* Start listening on the socket */ | |
48db9ca4 | 1905 | err = kernel_listen(sock, 10); |
1da177e4 LT |
1906 | if (err) { |
1907 | BT_ERR("Listen failed %d", err); | |
1908 | goto failed; | |
1909 | } | |
1910 | ||
1911 | /* Add listening session */ | |
1912 | s = rfcomm_session_add(sock, BT_LISTEN); | |
1913 | if (!s) | |
1914 | goto failed; | |
1915 | ||
1916 | rfcomm_session_hold(s); | |
1917 | return 0; | |
1918 | failed: | |
1919 | sock_release(sock); | |
1920 | return err; | |
1921 | } | |
1922 | ||
1923 | static void rfcomm_kill_listener(void) | |
1924 | { | |
1925 | struct rfcomm_session *s; | |
1926 | struct list_head *p, *n; | |
1927 | ||
1928 | BT_DBG(""); | |
1929 | ||
1930 | list_for_each_safe(p, n, &session_list) { | |
1931 | s = list_entry(p, struct rfcomm_session, list); | |
1932 | rfcomm_session_del(s); | |
1933 | } | |
1934 | } | |
1935 | ||
1936 | static int rfcomm_run(void *unused) | |
1937 | { | |
1938 | rfcomm_thread = current; | |
1939 | ||
1940 | atomic_inc(&running); | |
1941 | ||
1942 | daemonize("krfcommd"); | |
1943 | set_user_nice(current, -10); | |
1da177e4 LT |
1944 | |
1945 | BT_DBG(""); | |
1946 | ||
1947 | rfcomm_add_listener(BDADDR_ANY); | |
1948 | ||
1949 | rfcomm_worker(); | |
1950 | ||
1951 | rfcomm_kill_listener(); | |
1952 | ||
1953 | atomic_dec(&running); | |
1954 | return 0; | |
1955 | } | |
1956 | ||
1957 | static void rfcomm_auth_cfm(struct hci_conn *conn, u8 status) | |
1958 | { | |
1959 | struct rfcomm_session *s; | |
1960 | struct rfcomm_dlc *d; | |
1961 | struct list_head *p, *n; | |
1962 | ||
1963 | BT_DBG("conn %p status 0x%02x", conn, status); | |
1964 | ||
1965 | s = rfcomm_session_get(&conn->hdev->bdaddr, &conn->dst); | |
1966 | if (!s) | |
1967 | return; | |
1968 | ||
1969 | rfcomm_session_hold(s); | |
1970 | ||
1971 | list_for_each_safe(p, n, &s->dlcs) { | |
1972 | d = list_entry(p, struct rfcomm_dlc, list); | |
1973 | ||
1974 | if (d->link_mode & (RFCOMM_LM_ENCRYPT | RFCOMM_LM_SECURE)) | |
1975 | continue; | |
1976 | ||
1977 | if (!test_and_clear_bit(RFCOMM_AUTH_PENDING, &d->flags)) | |
1978 | continue; | |
1979 | ||
1980 | if (!status) | |
1981 | set_bit(RFCOMM_AUTH_ACCEPT, &d->flags); | |
1982 | else | |
1983 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
1984 | } | |
1985 | ||
1986 | rfcomm_session_put(s); | |
1987 | ||
1988 | rfcomm_schedule(RFCOMM_SCHED_AUTH); | |
1989 | } | |
1990 | ||
1991 | static void rfcomm_encrypt_cfm(struct hci_conn *conn, u8 status, u8 encrypt) | |
1992 | { | |
1993 | struct rfcomm_session *s; | |
1994 | struct rfcomm_dlc *d; | |
1995 | struct list_head *p, *n; | |
1996 | ||
1997 | BT_DBG("conn %p status 0x%02x encrypt 0x%02x", conn, status, encrypt); | |
1998 | ||
1999 | s = rfcomm_session_get(&conn->hdev->bdaddr, &conn->dst); | |
2000 | if (!s) | |
2001 | return; | |
2002 | ||
2003 | rfcomm_session_hold(s); | |
2004 | ||
2005 | list_for_each_safe(p, n, &s->dlcs) { | |
2006 | d = list_entry(p, struct rfcomm_dlc, list); | |
2007 | ||
2008 | if (!test_and_clear_bit(RFCOMM_AUTH_PENDING, &d->flags)) | |
2009 | continue; | |
2010 | ||
2011 | if (!status && encrypt) | |
2012 | set_bit(RFCOMM_AUTH_ACCEPT, &d->flags); | |
2013 | else | |
2014 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
2015 | } | |
2016 | ||
2017 | rfcomm_session_put(s); | |
2018 | ||
2019 | rfcomm_schedule(RFCOMM_SCHED_AUTH); | |
2020 | } | |
2021 | ||
2022 | static struct hci_cb rfcomm_cb = { | |
2023 | .name = "RFCOMM", | |
2024 | .auth_cfm = rfcomm_auth_cfm, | |
2025 | .encrypt_cfm = rfcomm_encrypt_cfm | |
2026 | }; | |
2027 | ||
be9d1227 | 2028 | static ssize_t rfcomm_dlc_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
2029 | { |
2030 | struct rfcomm_session *s; | |
2031 | struct list_head *pp, *p; | |
be9d1227 | 2032 | char *str = buf; |
1da177e4 LT |
2033 | |
2034 | rfcomm_lock(); | |
2035 | ||
2036 | list_for_each(p, &session_list) { | |
2037 | s = list_entry(p, struct rfcomm_session, list); | |
be9d1227 MH |
2038 | list_for_each(pp, &s->dlcs) { |
2039 | struct sock *sk = s->sock->sk; | |
2040 | struct rfcomm_dlc *d = list_entry(pp, struct rfcomm_dlc, list); | |
1da177e4 | 2041 | |
be9d1227 MH |
2042 | str += sprintf(str, "%s %s %ld %d %d %d %d\n", |
2043 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), | |
2044 | d->state, d->dlci, d->mtu, d->rx_credits, d->tx_credits); | |
1da177e4 LT |
2045 | } |
2046 | } | |
1da177e4 | 2047 | |
1da177e4 | 2048 | rfcomm_unlock(); |
1da177e4 | 2049 | |
be9d1227 | 2050 | return (str - buf); |
1da177e4 LT |
2051 | } |
2052 | ||
be9d1227 | 2053 | static CLASS_ATTR(rfcomm_dlc, S_IRUGO, rfcomm_dlc_sysfs_show, NULL); |
1da177e4 LT |
2054 | |
2055 | /* ---- Initialization ---- */ | |
2056 | static int __init rfcomm_init(void) | |
2057 | { | |
2058 | l2cap_load(); | |
2059 | ||
2060 | hci_register_cb(&rfcomm_cb); | |
2061 | ||
2062 | kernel_thread(rfcomm_run, NULL, CLONE_KERNEL); | |
2063 | ||
df5c37ea MH |
2064 | if (class_create_file(bt_class, &class_attr_rfcomm_dlc) < 0) |
2065 | BT_ERR("Failed to create RFCOMM info file"); | |
1da177e4 LT |
2066 | |
2067 | rfcomm_init_sockets(); | |
2068 | ||
2069 | #ifdef CONFIG_BT_RFCOMM_TTY | |
2070 | rfcomm_init_ttys(); | |
2071 | #endif | |
2072 | ||
be9d1227 MH |
2073 | BT_INFO("RFCOMM ver %s", VERSION); |
2074 | ||
1da177e4 LT |
2075 | return 0; |
2076 | } | |
2077 | ||
2078 | static void __exit rfcomm_exit(void) | |
2079 | { | |
a91f2e39 | 2080 | class_remove_file(bt_class, &class_attr_rfcomm_dlc); |
be9d1227 | 2081 | |
1da177e4 LT |
2082 | hci_unregister_cb(&rfcomm_cb); |
2083 | ||
2084 | /* Terminate working thread. | |
2085 | * ie. Set terminate flag and wake it up */ | |
2086 | atomic_inc(&terminate); | |
2087 | rfcomm_schedule(RFCOMM_SCHED_STATE); | |
2088 | ||
2089 | /* Wait until thread is running */ | |
2090 | while (atomic_read(&running)) | |
2091 | schedule(); | |
2092 | ||
2093 | #ifdef CONFIG_BT_RFCOMM_TTY | |
2094 | rfcomm_cleanup_ttys(); | |
2095 | #endif | |
2096 | ||
2097 | rfcomm_cleanup_sockets(); | |
1da177e4 LT |
2098 | } |
2099 | ||
2100 | module_init(rfcomm_init); | |
2101 | module_exit(rfcomm_exit); | |
2102 | ||
7c2660b0 MH |
2103 | module_param(disable_cfc, bool, 0644); |
2104 | MODULE_PARM_DESC(disable_cfc, "Disable credit based flow control"); | |
2105 | ||
98bcd08b MH |
2106 | module_param(channel_mtu, int, 0644); |
2107 | MODULE_PARM_DESC(channel_mtu, "Default MTU for the RFCOMM channel"); | |
2108 | ||
56f3a40a MH |
2109 | module_param(l2cap_mtu, uint, 0644); |
2110 | MODULE_PARM_DESC(l2cap_mtu, "Default MTU for the L2CAP connection"); | |
2111 | ||
1da177e4 LT |
2112 | MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>"); |
2113 | MODULE_DESCRIPTION("Bluetooth RFCOMM ver " VERSION); | |
2114 | MODULE_VERSION(VERSION); | |
2115 | MODULE_LICENSE("GPL"); | |
2116 | MODULE_ALIAS("bt-proto-3"); |