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Commit | Line | Data |
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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. | |
1da177e4 LT |
26 | */ |
27 | ||
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/errno.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/sched.h> | |
32 | #include <linux/signal.h> | |
33 | #include <linux/init.h> | |
34 | #include <linux/wait.h> | |
be9d1227 | 35 | #include <linux/device.h> |
aef7d97c MH |
36 | #include <linux/debugfs.h> |
37 | #include <linux/seq_file.h> | |
1da177e4 | 38 | #include <linux/net.h> |
4a3e2f71 | 39 | #include <linux/mutex.h> |
a524eccc | 40 | #include <linux/kthread.h> |
4a3e2f71 | 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 | ||
5f9018af | 51 | #define VERSION "1.11" |
56f3a40a | 52 | |
7c2660b0 | 53 | static int disable_cfc = 0; |
98bcd08b | 54 | static int channel_mtu = -1; |
56f3a40a | 55 | static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU; |
eae38eed | 56 | static int l2cap_ertm = 0; |
56f3a40a | 57 | |
1da177e4 LT |
58 | static struct task_struct *rfcomm_thread; |
59 | ||
4a3e2f71 AV |
60 | static DEFINE_MUTEX(rfcomm_mutex); |
61 | #define rfcomm_lock() mutex_lock(&rfcomm_mutex) | |
62 | #define rfcomm_unlock() mutex_unlock(&rfcomm_mutex) | |
1da177e4 LT |
63 | |
64 | static unsigned long rfcomm_event; | |
65 | ||
66 | static LIST_HEAD(session_list); | |
1da177e4 LT |
67 | |
68 | static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len); | |
69 | static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci); | |
70 | static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci); | |
71 | static int rfcomm_queue_disc(struct rfcomm_dlc *d); | |
72 | static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type); | |
73 | static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d); | |
74 | static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig); | |
75 | static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len); | |
76 | static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits); | |
77 | static void rfcomm_make_uih(struct sk_buff *skb, u8 addr); | |
78 | ||
79 | static void rfcomm_process_connect(struct rfcomm_session *s); | |
80 | ||
81 | static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, bdaddr_t *dst, int *err); | |
82 | static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst); | |
83 | static void rfcomm_session_del(struct rfcomm_session *s); | |
84 | ||
85 | /* ---- RFCOMM frame parsing macros ---- */ | |
86 | #define __get_dlci(b) ((b & 0xfc) >> 2) | |
87 | #define __get_channel(b) ((b & 0xf8) >> 3) | |
88 | #define __get_dir(b) ((b & 0x04) >> 2) | |
89 | #define __get_type(b) ((b & 0xef)) | |
90 | ||
91 | #define __test_ea(b) ((b & 0x01)) | |
92 | #define __test_cr(b) ((b & 0x02)) | |
93 | #define __test_pf(b) ((b & 0x10)) | |
94 | ||
95 | #define __addr(cr, dlci) (((dlci & 0x3f) << 2) | (cr << 1) | 0x01) | |
96 | #define __ctrl(type, pf) (((type & 0xef) | (pf << 4))) | |
97 | #define __dlci(dir, chn) (((chn & 0x1f) << 1) | dir) | |
98 | #define __srv_channel(dlci) (dlci >> 1) | |
99 | #define __dir(dlci) (dlci & 0x01) | |
100 | ||
101 | #define __len8(len) (((len) << 1) | 1) | |
102 | #define __len16(len) ((len) << 1) | |
103 | ||
104 | /* MCC macros */ | |
105 | #define __mcc_type(cr, type) (((type << 2) | (cr << 1) | 0x01)) | |
106 | #define __get_mcc_type(b) ((b & 0xfc) >> 2) | |
107 | #define __get_mcc_len(b) ((b & 0xfe) >> 1) | |
108 | ||
109 | /* RPN macros */ | |
3a5e903c | 110 | #define __rpn_line_settings(data, stop, parity) ((data & 0x3) | ((stop & 0x1) << 2) | ((parity & 0x7) << 3)) |
1da177e4 LT |
111 | #define __get_rpn_data_bits(line) ((line) & 0x3) |
112 | #define __get_rpn_stop_bits(line) (((line) >> 2) & 0x1) | |
3a5e903c | 113 | #define __get_rpn_parity(line) (((line) >> 3) & 0x7) |
1da177e4 LT |
114 | |
115 | static inline void rfcomm_schedule(uint event) | |
116 | { | |
117 | if (!rfcomm_thread) | |
118 | return; | |
119 | //set_bit(event, &rfcomm_event); | |
120 | set_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event); | |
121 | wake_up_process(rfcomm_thread); | |
122 | } | |
123 | ||
124 | static inline void rfcomm_session_put(struct rfcomm_session *s) | |
125 | { | |
126 | if (atomic_dec_and_test(&s->refcnt)) | |
127 | rfcomm_session_del(s); | |
128 | } | |
129 | ||
130 | /* ---- RFCOMM FCS computation ---- */ | |
131 | ||
408c1ce2 | 132 | /* reversed, 8-bit, poly=0x07 */ |
8e87d142 | 133 | static unsigned char rfcomm_crc_table[256] = { |
408c1ce2 MH |
134 | 0x00, 0x91, 0xe3, 0x72, 0x07, 0x96, 0xe4, 0x75, |
135 | 0x0e, 0x9f, 0xed, 0x7c, 0x09, 0x98, 0xea, 0x7b, | |
136 | 0x1c, 0x8d, 0xff, 0x6e, 0x1b, 0x8a, 0xf8, 0x69, | |
137 | 0x12, 0x83, 0xf1, 0x60, 0x15, 0x84, 0xf6, 0x67, | |
138 | ||
139 | 0x38, 0xa9, 0xdb, 0x4a, 0x3f, 0xae, 0xdc, 0x4d, | |
140 | 0x36, 0xa7, 0xd5, 0x44, 0x31, 0xa0, 0xd2, 0x43, | |
141 | 0x24, 0xb5, 0xc7, 0x56, 0x23, 0xb2, 0xc0, 0x51, | |
142 | 0x2a, 0xbb, 0xc9, 0x58, 0x2d, 0xbc, 0xce, 0x5f, | |
143 | ||
144 | 0x70, 0xe1, 0x93, 0x02, 0x77, 0xe6, 0x94, 0x05, | |
145 | 0x7e, 0xef, 0x9d, 0x0c, 0x79, 0xe8, 0x9a, 0x0b, | |
146 | 0x6c, 0xfd, 0x8f, 0x1e, 0x6b, 0xfa, 0x88, 0x19, | |
147 | 0x62, 0xf3, 0x81, 0x10, 0x65, 0xf4, 0x86, 0x17, | |
148 | ||
149 | 0x48, 0xd9, 0xab, 0x3a, 0x4f, 0xde, 0xac, 0x3d, | |
150 | 0x46, 0xd7, 0xa5, 0x34, 0x41, 0xd0, 0xa2, 0x33, | |
151 | 0x54, 0xc5, 0xb7, 0x26, 0x53, 0xc2, 0xb0, 0x21, | |
152 | 0x5a, 0xcb, 0xb9, 0x28, 0x5d, 0xcc, 0xbe, 0x2f, | |
153 | ||
154 | 0xe0, 0x71, 0x03, 0x92, 0xe7, 0x76, 0x04, 0x95, | |
155 | 0xee, 0x7f, 0x0d, 0x9c, 0xe9, 0x78, 0x0a, 0x9b, | |
156 | 0xfc, 0x6d, 0x1f, 0x8e, 0xfb, 0x6a, 0x18, 0x89, | |
157 | 0xf2, 0x63, 0x11, 0x80, 0xf5, 0x64, 0x16, 0x87, | |
158 | ||
159 | 0xd8, 0x49, 0x3b, 0xaa, 0xdf, 0x4e, 0x3c, 0xad, | |
160 | 0xd6, 0x47, 0x35, 0xa4, 0xd1, 0x40, 0x32, 0xa3, | |
161 | 0xc4, 0x55, 0x27, 0xb6, 0xc3, 0x52, 0x20, 0xb1, | |
162 | 0xca, 0x5b, 0x29, 0xb8, 0xcd, 0x5c, 0x2e, 0xbf, | |
163 | ||
164 | 0x90, 0x01, 0x73, 0xe2, 0x97, 0x06, 0x74, 0xe5, | |
165 | 0x9e, 0x0f, 0x7d, 0xec, 0x99, 0x08, 0x7a, 0xeb, | |
166 | 0x8c, 0x1d, 0x6f, 0xfe, 0x8b, 0x1a, 0x68, 0xf9, | |
167 | 0x82, 0x13, 0x61, 0xf0, 0x85, 0x14, 0x66, 0xf7, | |
168 | ||
169 | 0xa8, 0x39, 0x4b, 0xda, 0xaf, 0x3e, 0x4c, 0xdd, | |
170 | 0xa6, 0x37, 0x45, 0xd4, 0xa1, 0x30, 0x42, 0xd3, | |
171 | 0xb4, 0x25, 0x57, 0xc6, 0xb3, 0x22, 0x50, 0xc1, | |
172 | 0xba, 0x2b, 0x59, 0xc8, 0xbd, 0x2c, 0x5e, 0xcf | |
173 | }; | |
174 | ||
1da177e4 LT |
175 | /* CRC on 2 bytes */ |
176 | #define __crc(data) (rfcomm_crc_table[rfcomm_crc_table[0xff ^ data[0]] ^ data[1]]) | |
177 | ||
8e87d142 | 178 | /* FCS on 2 bytes */ |
1da177e4 LT |
179 | static inline u8 __fcs(u8 *data) |
180 | { | |
181 | return (0xff - __crc(data)); | |
182 | } | |
183 | ||
8e87d142 | 184 | /* FCS on 3 bytes */ |
1da177e4 LT |
185 | static inline u8 __fcs2(u8 *data) |
186 | { | |
187 | return (0xff - rfcomm_crc_table[__crc(data) ^ data[2]]); | |
188 | } | |
189 | ||
190 | /* Check FCS */ | |
191 | static inline int __check_fcs(u8 *data, int type, u8 fcs) | |
192 | { | |
193 | u8 f = __crc(data); | |
194 | ||
195 | if (type != RFCOMM_UIH) | |
196 | f = rfcomm_crc_table[f ^ data[2]]; | |
197 | ||
198 | return rfcomm_crc_table[f ^ fcs] != 0xcf; | |
199 | } | |
200 | ||
201 | /* ---- L2CAP callbacks ---- */ | |
202 | static void rfcomm_l2state_change(struct sock *sk) | |
203 | { | |
204 | BT_DBG("%p state %d", sk, sk->sk_state); | |
205 | rfcomm_schedule(RFCOMM_SCHED_STATE); | |
206 | } | |
207 | ||
208 | static void rfcomm_l2data_ready(struct sock *sk, int bytes) | |
209 | { | |
210 | BT_DBG("%p bytes %d", sk, bytes); | |
211 | rfcomm_schedule(RFCOMM_SCHED_RX); | |
212 | } | |
213 | ||
214 | static int rfcomm_l2sock_create(struct socket **sock) | |
215 | { | |
216 | int err; | |
217 | ||
218 | BT_DBG(""); | |
219 | ||
220 | err = sock_create_kern(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP, sock); | |
221 | if (!err) { | |
222 | struct sock *sk = (*sock)->sk; | |
223 | sk->sk_data_ready = rfcomm_l2data_ready; | |
224 | sk->sk_state_change = rfcomm_l2state_change; | |
225 | } | |
226 | return err; | |
227 | } | |
228 | ||
9f2c8a03 | 229 | static inline int rfcomm_check_security(struct rfcomm_dlc *d) |
77db1980 MH |
230 | { |
231 | struct sock *sk = d->session->sock->sk; | |
0684e5f9 MH |
232 | __u8 auth_type; |
233 | ||
234 | switch (d->sec_level) { | |
235 | case BT_SECURITY_HIGH: | |
236 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
237 | break; | |
238 | case BT_SECURITY_MEDIUM: | |
239 | auth_type = HCI_AT_GENERAL_BONDING; | |
240 | break; | |
241 | default: | |
242 | auth_type = HCI_AT_NO_BONDING; | |
243 | break; | |
244 | } | |
77db1980 | 245 | |
0684e5f9 MH |
246 | return hci_conn_security(l2cap_pi(sk)->conn->hcon, d->sec_level, |
247 | auth_type); | |
77db1980 MH |
248 | } |
249 | ||
9e726b17 LAD |
250 | static void rfcomm_session_timeout(unsigned long arg) |
251 | { | |
252 | struct rfcomm_session *s = (void *) arg; | |
253 | ||
254 | BT_DBG("session %p state %ld", s, s->state); | |
255 | ||
256 | set_bit(RFCOMM_TIMED_OUT, &s->flags); | |
9e726b17 LAD |
257 | rfcomm_schedule(RFCOMM_SCHED_TIMEO); |
258 | } | |
259 | ||
260 | static void rfcomm_session_set_timer(struct rfcomm_session *s, long timeout) | |
261 | { | |
262 | BT_DBG("session %p state %ld timeout %ld", s, s->state, timeout); | |
263 | ||
264 | if (!mod_timer(&s->timer, jiffies + timeout)) | |
265 | rfcomm_session_hold(s); | |
266 | } | |
267 | ||
268 | static void rfcomm_session_clear_timer(struct rfcomm_session *s) | |
269 | { | |
270 | BT_DBG("session %p state %ld", s, s->state); | |
271 | ||
272 | if (timer_pending(&s->timer) && del_timer(&s->timer)) | |
273 | rfcomm_session_put(s); | |
274 | } | |
275 | ||
1da177e4 LT |
276 | /* ---- RFCOMM DLCs ---- */ |
277 | static void rfcomm_dlc_timeout(unsigned long arg) | |
278 | { | |
279 | struct rfcomm_dlc *d = (void *) arg; | |
280 | ||
281 | BT_DBG("dlc %p state %ld", d, d->state); | |
282 | ||
283 | set_bit(RFCOMM_TIMED_OUT, &d->flags); | |
284 | rfcomm_dlc_put(d); | |
285 | rfcomm_schedule(RFCOMM_SCHED_TIMEO); | |
286 | } | |
287 | ||
288 | static void rfcomm_dlc_set_timer(struct rfcomm_dlc *d, long timeout) | |
289 | { | |
290 | BT_DBG("dlc %p state %ld timeout %ld", d, d->state, timeout); | |
291 | ||
292 | if (!mod_timer(&d->timer, jiffies + timeout)) | |
293 | rfcomm_dlc_hold(d); | |
294 | } | |
295 | ||
296 | static void rfcomm_dlc_clear_timer(struct rfcomm_dlc *d) | |
297 | { | |
298 | BT_DBG("dlc %p state %ld", d, d->state); | |
299 | ||
300 | if (timer_pending(&d->timer) && del_timer(&d->timer)) | |
301 | rfcomm_dlc_put(d); | |
302 | } | |
303 | ||
304 | static void rfcomm_dlc_clear_state(struct rfcomm_dlc *d) | |
305 | { | |
306 | BT_DBG("%p", d); | |
307 | ||
308 | d->state = BT_OPEN; | |
309 | d->flags = 0; | |
310 | d->mscex = 0; | |
311 | d->mtu = RFCOMM_DEFAULT_MTU; | |
312 | d->v24_sig = RFCOMM_V24_RTC | RFCOMM_V24_RTR | RFCOMM_V24_DV; | |
313 | ||
314 | d->cfc = RFCOMM_CFC_DISABLED; | |
315 | d->rx_credits = RFCOMM_DEFAULT_CREDITS; | |
316 | } | |
317 | ||
dd0fc66f | 318 | struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio) |
1da177e4 | 319 | { |
25ea6db0 MH |
320 | struct rfcomm_dlc *d = kzalloc(sizeof(*d), prio); |
321 | ||
1da177e4 LT |
322 | if (!d) |
323 | return NULL; | |
1da177e4 | 324 | |
b24b8a24 | 325 | setup_timer(&d->timer, rfcomm_dlc_timeout, (unsigned long)d); |
1da177e4 LT |
326 | |
327 | skb_queue_head_init(&d->tx_queue); | |
328 | spin_lock_init(&d->lock); | |
329 | atomic_set(&d->refcnt, 1); | |
330 | ||
331 | rfcomm_dlc_clear_state(d); | |
8e87d142 | 332 | |
1da177e4 | 333 | BT_DBG("%p", d); |
25ea6db0 | 334 | |
1da177e4 LT |
335 | return d; |
336 | } | |
337 | ||
338 | void rfcomm_dlc_free(struct rfcomm_dlc *d) | |
339 | { | |
340 | BT_DBG("%p", d); | |
341 | ||
342 | skb_queue_purge(&d->tx_queue); | |
343 | kfree(d); | |
344 | } | |
345 | ||
346 | static void rfcomm_dlc_link(struct rfcomm_session *s, struct rfcomm_dlc *d) | |
347 | { | |
348 | BT_DBG("dlc %p session %p", d, s); | |
349 | ||
350 | rfcomm_session_hold(s); | |
351 | ||
9e726b17 | 352 | rfcomm_session_clear_timer(s); |
1da177e4 LT |
353 | rfcomm_dlc_hold(d); |
354 | list_add(&d->list, &s->dlcs); | |
355 | d->session = s; | |
356 | } | |
357 | ||
358 | static void rfcomm_dlc_unlink(struct rfcomm_dlc *d) | |
359 | { | |
360 | struct rfcomm_session *s = d->session; | |
361 | ||
362 | BT_DBG("dlc %p refcnt %d session %p", d, atomic_read(&d->refcnt), s); | |
363 | ||
364 | list_del(&d->list); | |
365 | d->session = NULL; | |
366 | rfcomm_dlc_put(d); | |
367 | ||
9e726b17 LAD |
368 | if (list_empty(&s->dlcs)) |
369 | rfcomm_session_set_timer(s, RFCOMM_IDLE_TIMEOUT); | |
370 | ||
1da177e4 LT |
371 | rfcomm_session_put(s); |
372 | } | |
373 | ||
374 | static struct rfcomm_dlc *rfcomm_dlc_get(struct rfcomm_session *s, u8 dlci) | |
375 | { | |
376 | struct rfcomm_dlc *d; | |
377 | struct list_head *p; | |
378 | ||
379 | list_for_each(p, &s->dlcs) { | |
380 | d = list_entry(p, struct rfcomm_dlc, list); | |
381 | if (d->dlci == dlci) | |
382 | return d; | |
383 | } | |
384 | return NULL; | |
385 | } | |
386 | ||
387 | static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) | |
388 | { | |
389 | struct rfcomm_session *s; | |
390 | int err = 0; | |
391 | u8 dlci; | |
392 | ||
8e87d142 | 393 | BT_DBG("dlc %p state %ld %s %s channel %d", |
1da177e4 LT |
394 | d, d->state, batostr(src), batostr(dst), channel); |
395 | ||
396 | if (channel < 1 || channel > 30) | |
397 | return -EINVAL; | |
398 | ||
399 | if (d->state != BT_OPEN && d->state != BT_CLOSED) | |
400 | return 0; | |
401 | ||
402 | s = rfcomm_session_get(src, dst); | |
403 | if (!s) { | |
404 | s = rfcomm_session_create(src, dst, &err); | |
405 | if (!s) | |
406 | return err; | |
407 | } | |
408 | ||
409 | dlci = __dlci(!s->initiator, channel); | |
410 | ||
411 | /* Check if DLCI already exists */ | |
412 | if (rfcomm_dlc_get(s, dlci)) | |
413 | return -EBUSY; | |
414 | ||
415 | rfcomm_dlc_clear_state(d); | |
416 | ||
417 | d->dlci = dlci; | |
418 | d->addr = __addr(s->initiator, dlci); | |
419 | d->priority = 7; | |
420 | ||
77db1980 | 421 | d->state = BT_CONFIG; |
1da177e4 LT |
422 | rfcomm_dlc_link(s, d); |
423 | ||
77db1980 MH |
424 | d->out = 1; |
425 | ||
1da177e4 LT |
426 | d->mtu = s->mtu; |
427 | d->cfc = (s->cfc == RFCOMM_CFC_UNKNOWN) ? 0 : s->cfc; | |
428 | ||
77db1980 | 429 | if (s->state == BT_CONNECTED) { |
9f2c8a03 | 430 | if (rfcomm_check_security(d)) |
77db1980 | 431 | rfcomm_send_pn(s, 1, d); |
8c1b2355 MH |
432 | else |
433 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); | |
77db1980 MH |
434 | } |
435 | ||
1da177e4 | 436 | rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT); |
77db1980 | 437 | |
1da177e4 LT |
438 | return 0; |
439 | } | |
440 | ||
441 | int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) | |
442 | { | |
443 | int r; | |
444 | ||
445 | rfcomm_lock(); | |
446 | ||
447 | r = __rfcomm_dlc_open(d, src, dst, channel); | |
448 | ||
449 | rfcomm_unlock(); | |
450 | return r; | |
451 | } | |
452 | ||
453 | static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err) | |
454 | { | |
455 | struct rfcomm_session *s = d->session; | |
456 | if (!s) | |
457 | return 0; | |
458 | ||
459 | BT_DBG("dlc %p state %ld dlci %d err %d session %p", | |
460 | d, d->state, d->dlci, err, s); | |
461 | ||
462 | switch (d->state) { | |
1da177e4 | 463 | case BT_CONNECT: |
bb23c0ab MH |
464 | case BT_CONFIG: |
465 | if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { | |
466 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
467 | rfcomm_schedule(RFCOMM_SCHED_AUTH); | |
468 | break; | |
469 | } | |
470 | /* Fall through */ | |
471 | ||
472 | case BT_CONNECTED: | |
1da177e4 LT |
473 | d->state = BT_DISCONN; |
474 | if (skb_queue_empty(&d->tx_queue)) { | |
475 | rfcomm_send_disc(s, d->dlci); | |
476 | rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT); | |
477 | } else { | |
478 | rfcomm_queue_disc(d); | |
479 | rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT * 2); | |
480 | } | |
481 | break; | |
482 | ||
bb23c0ab | 483 | case BT_OPEN: |
8bf47941 | 484 | case BT_CONNECT2: |
bb23c0ab MH |
485 | if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { |
486 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
487 | rfcomm_schedule(RFCOMM_SCHED_AUTH); | |
488 | break; | |
489 | } | |
490 | /* Fall through */ | |
491 | ||
1da177e4 LT |
492 | default: |
493 | rfcomm_dlc_clear_timer(d); | |
494 | ||
495 | rfcomm_dlc_lock(d); | |
496 | d->state = BT_CLOSED; | |
1905f6c7 | 497 | d->state_change(d, err); |
4c8411f8 | 498 | rfcomm_dlc_unlock(d); |
1da177e4 LT |
499 | |
500 | skb_queue_purge(&d->tx_queue); | |
1da177e4 LT |
501 | rfcomm_dlc_unlink(d); |
502 | } | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
507 | int rfcomm_dlc_close(struct rfcomm_dlc *d, int err) | |
508 | { | |
509 | int r; | |
510 | ||
511 | rfcomm_lock(); | |
512 | ||
513 | r = __rfcomm_dlc_close(d, err); | |
514 | ||
515 | rfcomm_unlock(); | |
516 | return r; | |
517 | } | |
518 | ||
519 | int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb) | |
520 | { | |
521 | int len = skb->len; | |
522 | ||
523 | if (d->state != BT_CONNECTED) | |
524 | return -ENOTCONN; | |
525 | ||
526 | BT_DBG("dlc %p mtu %d len %d", d, d->mtu, len); | |
527 | ||
528 | if (len > d->mtu) | |
529 | return -EINVAL; | |
530 | ||
531 | rfcomm_make_uih(skb, d->addr); | |
532 | skb_queue_tail(&d->tx_queue, skb); | |
533 | ||
534 | if (!test_bit(RFCOMM_TX_THROTTLED, &d->flags)) | |
535 | rfcomm_schedule(RFCOMM_SCHED_TX); | |
536 | return len; | |
537 | } | |
538 | ||
b5606c2d | 539 | void __rfcomm_dlc_throttle(struct rfcomm_dlc *d) |
1da177e4 LT |
540 | { |
541 | BT_DBG("dlc %p state %ld", d, d->state); | |
542 | ||
543 | if (!d->cfc) { | |
544 | d->v24_sig |= RFCOMM_V24_FC; | |
545 | set_bit(RFCOMM_MSC_PENDING, &d->flags); | |
546 | } | |
547 | rfcomm_schedule(RFCOMM_SCHED_TX); | |
548 | } | |
549 | ||
b5606c2d | 550 | void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d) |
1da177e4 LT |
551 | { |
552 | BT_DBG("dlc %p state %ld", d, d->state); | |
553 | ||
554 | if (!d->cfc) { | |
555 | d->v24_sig &= ~RFCOMM_V24_FC; | |
556 | set_bit(RFCOMM_MSC_PENDING, &d->flags); | |
557 | } | |
558 | rfcomm_schedule(RFCOMM_SCHED_TX); | |
559 | } | |
560 | ||
8e87d142 | 561 | /* |
1da177e4 LT |
562 | Set/get modem status functions use _local_ status i.e. what we report |
563 | to the other side. | |
564 | Remote status is provided by dlc->modem_status() callback. | |
565 | */ | |
566 | int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig) | |
567 | { | |
8e87d142 | 568 | BT_DBG("dlc %p state %ld v24_sig 0x%x", |
1da177e4 LT |
569 | d, d->state, v24_sig); |
570 | ||
571 | if (test_bit(RFCOMM_RX_THROTTLED, &d->flags)) | |
572 | v24_sig |= RFCOMM_V24_FC; | |
573 | else | |
574 | v24_sig &= ~RFCOMM_V24_FC; | |
8e87d142 | 575 | |
1da177e4 LT |
576 | d->v24_sig = v24_sig; |
577 | ||
578 | if (!test_and_set_bit(RFCOMM_MSC_PENDING, &d->flags)) | |
579 | rfcomm_schedule(RFCOMM_SCHED_TX); | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig) | |
585 | { | |
8e87d142 | 586 | BT_DBG("dlc %p state %ld v24_sig 0x%x", |
1da177e4 LT |
587 | d, d->state, d->v24_sig); |
588 | ||
589 | *v24_sig = d->v24_sig; | |
590 | return 0; | |
591 | } | |
592 | ||
593 | /* ---- RFCOMM sessions ---- */ | |
594 | static struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state) | |
595 | { | |
25ea6db0 MH |
596 | struct rfcomm_session *s = kzalloc(sizeof(*s), GFP_KERNEL); |
597 | ||
1da177e4 LT |
598 | if (!s) |
599 | return NULL; | |
1da177e4 LT |
600 | |
601 | BT_DBG("session %p sock %p", s, sock); | |
602 | ||
9e726b17 LAD |
603 | setup_timer(&s->timer, rfcomm_session_timeout, (unsigned long) s); |
604 | ||
1da177e4 LT |
605 | INIT_LIST_HEAD(&s->dlcs); |
606 | s->state = state; | |
607 | s->sock = sock; | |
608 | ||
609 | s->mtu = RFCOMM_DEFAULT_MTU; | |
7c2660b0 | 610 | s->cfc = disable_cfc ? RFCOMM_CFC_DISABLED : RFCOMM_CFC_UNKNOWN; |
1da177e4 LT |
611 | |
612 | /* Do not increment module usage count for listening sessions. | |
613 | * Otherwise we won't be able to unload the module. */ | |
614 | if (state != BT_LISTEN) | |
615 | if (!try_module_get(THIS_MODULE)) { | |
616 | kfree(s); | |
617 | return NULL; | |
618 | } | |
619 | ||
620 | list_add(&s->list, &session_list); | |
621 | ||
622 | return s; | |
623 | } | |
624 | ||
625 | static void rfcomm_session_del(struct rfcomm_session *s) | |
626 | { | |
627 | int state = s->state; | |
628 | ||
629 | BT_DBG("session %p state %ld", s, s->state); | |
630 | ||
631 | list_del(&s->list); | |
632 | ||
633 | if (state == BT_CONNECTED) | |
634 | rfcomm_send_disc(s, 0); | |
635 | ||
9e726b17 | 636 | rfcomm_session_clear_timer(s); |
1da177e4 LT |
637 | sock_release(s->sock); |
638 | kfree(s); | |
639 | ||
640 | if (state != BT_LISTEN) | |
641 | module_put(THIS_MODULE); | |
642 | } | |
643 | ||
644 | static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst) | |
645 | { | |
646 | struct rfcomm_session *s; | |
647 | struct list_head *p, *n; | |
648 | struct bt_sock *sk; | |
649 | list_for_each_safe(p, n, &session_list) { | |
650 | s = list_entry(p, struct rfcomm_session, list); | |
8e87d142 | 651 | sk = bt_sk(s->sock->sk); |
1da177e4 LT |
652 | |
653 | if ((!bacmp(src, BDADDR_ANY) || !bacmp(&sk->src, src)) && | |
654 | !bacmp(&sk->dst, dst)) | |
655 | return s; | |
656 | } | |
657 | return NULL; | |
658 | } | |
659 | ||
660 | static void rfcomm_session_close(struct rfcomm_session *s, int err) | |
661 | { | |
662 | struct rfcomm_dlc *d; | |
663 | struct list_head *p, *n; | |
664 | ||
665 | BT_DBG("session %p state %ld err %d", s, s->state, err); | |
666 | ||
667 | rfcomm_session_hold(s); | |
668 | ||
669 | s->state = BT_CLOSED; | |
670 | ||
671 | /* Close all dlcs */ | |
672 | list_for_each_safe(p, n, &s->dlcs) { | |
673 | d = list_entry(p, struct rfcomm_dlc, list); | |
674 | d->state = BT_CLOSED; | |
675 | __rfcomm_dlc_close(d, err); | |
676 | } | |
677 | ||
9e726b17 | 678 | rfcomm_session_clear_timer(s); |
1da177e4 LT |
679 | rfcomm_session_put(s); |
680 | } | |
681 | ||
682 | static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, bdaddr_t *dst, int *err) | |
683 | { | |
684 | struct rfcomm_session *s = NULL; | |
685 | struct sockaddr_l2 addr; | |
686 | struct socket *sock; | |
687 | struct sock *sk; | |
688 | ||
689 | BT_DBG("%s %s", batostr(src), batostr(dst)); | |
690 | ||
691 | *err = rfcomm_l2sock_create(&sock); | |
692 | if (*err < 0) | |
693 | return NULL; | |
694 | ||
695 | bacpy(&addr.l2_bdaddr, src); | |
696 | addr.l2_family = AF_BLUETOOTH; | |
697 | addr.l2_psm = 0; | |
37e62f55 | 698 | addr.l2_cid = 0; |
48db9ca4 | 699 | *err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); |
1da177e4 LT |
700 | if (*err < 0) |
701 | goto failed; | |
702 | ||
703 | /* Set L2CAP options */ | |
704 | sk = sock->sk; | |
705 | lock_sock(sk); | |
56f3a40a | 706 | l2cap_pi(sk)->imtu = l2cap_mtu; |
eae38eed MH |
707 | if (l2cap_ertm) |
708 | l2cap_pi(sk)->mode = L2CAP_MODE_ERTM; | |
1da177e4 LT |
709 | release_sock(sk); |
710 | ||
711 | s = rfcomm_session_add(sock, BT_BOUND); | |
712 | if (!s) { | |
713 | *err = -ENOMEM; | |
714 | goto failed; | |
715 | } | |
716 | ||
1da177e4 LT |
717 | s->initiator = 1; |
718 | ||
719 | bacpy(&addr.l2_bdaddr, dst); | |
720 | addr.l2_family = AF_BLUETOOTH; | |
b4324b5d | 721 | addr.l2_psm = cpu_to_le16(RFCOMM_PSM); |
37e62f55 | 722 | addr.l2_cid = 0; |
48db9ca4 | 723 | *err = kernel_connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK); |
b4c612a4 | 724 | if (*err == 0 || *err == -EINPROGRESS) |
1da177e4 LT |
725 | return s; |
726 | ||
727 | rfcomm_session_del(s); | |
728 | return NULL; | |
729 | ||
730 | failed: | |
731 | sock_release(sock); | |
732 | return NULL; | |
733 | } | |
734 | ||
735 | void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst) | |
736 | { | |
737 | struct sock *sk = s->sock->sk; | |
738 | if (src) | |
739 | bacpy(src, &bt_sk(sk)->src); | |
740 | if (dst) | |
741 | bacpy(dst, &bt_sk(sk)->dst); | |
742 | } | |
743 | ||
744 | /* ---- RFCOMM frame sending ---- */ | |
745 | static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len) | |
746 | { | |
747 | struct socket *sock = s->sock; | |
748 | struct kvec iv = { data, len }; | |
749 | struct msghdr msg; | |
750 | ||
751 | BT_DBG("session %p len %d", s, len); | |
752 | ||
753 | memset(&msg, 0, sizeof(msg)); | |
754 | ||
755 | return kernel_sendmsg(sock, &msg, &iv, 1, len); | |
756 | } | |
757 | ||
758 | static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci) | |
759 | { | |
760 | struct rfcomm_cmd cmd; | |
761 | ||
762 | BT_DBG("%p dlci %d", s, dlci); | |
763 | ||
764 | cmd.addr = __addr(s->initiator, dlci); | |
765 | cmd.ctrl = __ctrl(RFCOMM_SABM, 1); | |
766 | cmd.len = __len8(0); | |
767 | cmd.fcs = __fcs2((u8 *) &cmd); | |
768 | ||
769 | return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd)); | |
770 | } | |
771 | ||
772 | static int rfcomm_send_ua(struct rfcomm_session *s, u8 dlci) | |
773 | { | |
774 | struct rfcomm_cmd cmd; | |
775 | ||
776 | BT_DBG("%p dlci %d", s, dlci); | |
777 | ||
778 | cmd.addr = __addr(!s->initiator, dlci); | |
779 | cmd.ctrl = __ctrl(RFCOMM_UA, 1); | |
780 | cmd.len = __len8(0); | |
781 | cmd.fcs = __fcs2((u8 *) &cmd); | |
782 | ||
783 | return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd)); | |
784 | } | |
785 | ||
786 | static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci) | |
787 | { | |
788 | struct rfcomm_cmd cmd; | |
789 | ||
790 | BT_DBG("%p dlci %d", s, dlci); | |
791 | ||
792 | cmd.addr = __addr(s->initiator, dlci); | |
793 | cmd.ctrl = __ctrl(RFCOMM_DISC, 1); | |
794 | cmd.len = __len8(0); | |
795 | cmd.fcs = __fcs2((u8 *) &cmd); | |
796 | ||
797 | return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd)); | |
798 | } | |
799 | ||
800 | static int rfcomm_queue_disc(struct rfcomm_dlc *d) | |
801 | { | |
802 | struct rfcomm_cmd *cmd; | |
803 | struct sk_buff *skb; | |
804 | ||
805 | BT_DBG("dlc %p dlci %d", d, d->dlci); | |
806 | ||
807 | skb = alloc_skb(sizeof(*cmd), GFP_KERNEL); | |
808 | if (!skb) | |
809 | return -ENOMEM; | |
810 | ||
811 | cmd = (void *) __skb_put(skb, sizeof(*cmd)); | |
812 | cmd->addr = d->addr; | |
813 | cmd->ctrl = __ctrl(RFCOMM_DISC, 1); | |
814 | cmd->len = __len8(0); | |
815 | cmd->fcs = __fcs2((u8 *) cmd); | |
816 | ||
817 | skb_queue_tail(&d->tx_queue, skb); | |
818 | rfcomm_schedule(RFCOMM_SCHED_TX); | |
819 | return 0; | |
820 | } | |
821 | ||
822 | static int rfcomm_send_dm(struct rfcomm_session *s, u8 dlci) | |
823 | { | |
824 | struct rfcomm_cmd cmd; | |
825 | ||
826 | BT_DBG("%p dlci %d", s, dlci); | |
827 | ||
828 | cmd.addr = __addr(!s->initiator, dlci); | |
829 | cmd.ctrl = __ctrl(RFCOMM_DM, 1); | |
830 | cmd.len = __len8(0); | |
831 | cmd.fcs = __fcs2((u8 *) &cmd); | |
832 | ||
833 | return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd)); | |
834 | } | |
835 | ||
836 | static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type) | |
837 | { | |
838 | struct rfcomm_hdr *hdr; | |
839 | struct rfcomm_mcc *mcc; | |
840 | u8 buf[16], *ptr = buf; | |
841 | ||
842 | BT_DBG("%p cr %d type %d", s, cr, type); | |
843 | ||
844 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
845 | hdr->addr = __addr(s->initiator, 0); | |
846 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
847 | hdr->len = __len8(sizeof(*mcc) + 1); | |
848 | ||
849 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
850 | mcc->type = __mcc_type(cr, RFCOMM_NSC); | |
851 | mcc->len = __len8(1); | |
852 | ||
853 | /* Type that we didn't like */ | |
854 | *ptr = __mcc_type(cr, type); ptr++; | |
855 | ||
856 | *ptr = __fcs(buf); ptr++; | |
857 | ||
858 | return rfcomm_send_frame(s, buf, ptr - buf); | |
859 | } | |
860 | ||
861 | static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d) | |
862 | { | |
863 | struct rfcomm_hdr *hdr; | |
864 | struct rfcomm_mcc *mcc; | |
865 | struct rfcomm_pn *pn; | |
866 | u8 buf[16], *ptr = buf; | |
867 | ||
868 | BT_DBG("%p cr %d dlci %d mtu %d", s, cr, d->dlci, d->mtu); | |
869 | ||
870 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
871 | hdr->addr = __addr(s->initiator, 0); | |
872 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
873 | hdr->len = __len8(sizeof(*mcc) + sizeof(*pn)); | |
874 | ||
875 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
876 | mcc->type = __mcc_type(cr, RFCOMM_PN); | |
877 | mcc->len = __len8(sizeof(*pn)); | |
878 | ||
879 | pn = (void *) ptr; ptr += sizeof(*pn); | |
880 | pn->dlci = d->dlci; | |
881 | pn->priority = d->priority; | |
882 | pn->ack_timer = 0; | |
883 | pn->max_retrans = 0; | |
884 | ||
885 | if (s->cfc) { | |
886 | pn->flow_ctrl = cr ? 0xf0 : 0xe0; | |
887 | pn->credits = RFCOMM_DEFAULT_CREDITS; | |
888 | } else { | |
889 | pn->flow_ctrl = 0; | |
890 | pn->credits = 0; | |
891 | } | |
892 | ||
98bcd08b | 893 | if (cr && channel_mtu >= 0) |
b4324b5d | 894 | pn->mtu = cpu_to_le16(channel_mtu); |
98bcd08b | 895 | else |
b4324b5d | 896 | pn->mtu = cpu_to_le16(d->mtu); |
1da177e4 LT |
897 | |
898 | *ptr = __fcs(buf); ptr++; | |
899 | ||
900 | return rfcomm_send_frame(s, buf, ptr - buf); | |
901 | } | |
902 | ||
3a5e903c S |
903 | int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci, |
904 | u8 bit_rate, u8 data_bits, u8 stop_bits, | |
8e87d142 | 905 | u8 parity, u8 flow_ctrl_settings, |
3a5e903c | 906 | u8 xon_char, u8 xoff_char, u16 param_mask) |
1da177e4 LT |
907 | { |
908 | struct rfcomm_hdr *hdr; | |
909 | struct rfcomm_mcc *mcc; | |
910 | struct rfcomm_rpn *rpn; | |
911 | u8 buf[16], *ptr = buf; | |
912 | ||
913 | BT_DBG("%p cr %d dlci %d bit_r 0x%x data_b 0x%x stop_b 0x%x parity 0x%x" | |
8e87d142 YH |
914 | " flwc_s 0x%x xon_c 0x%x xoff_c 0x%x p_mask 0x%x", |
915 | s, cr, dlci, bit_rate, data_bits, stop_bits, parity, | |
3a5e903c | 916 | flow_ctrl_settings, xon_char, xoff_char, param_mask); |
1da177e4 LT |
917 | |
918 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
919 | hdr->addr = __addr(s->initiator, 0); | |
920 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
921 | hdr->len = __len8(sizeof(*mcc) + sizeof(*rpn)); | |
922 | ||
923 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
924 | mcc->type = __mcc_type(cr, RFCOMM_RPN); | |
925 | mcc->len = __len8(sizeof(*rpn)); | |
926 | ||
927 | rpn = (void *) ptr; ptr += sizeof(*rpn); | |
928 | rpn->dlci = __addr(1, dlci); | |
929 | rpn->bit_rate = bit_rate; | |
930 | rpn->line_settings = __rpn_line_settings(data_bits, stop_bits, parity); | |
931 | rpn->flow_ctrl = flow_ctrl_settings; | |
932 | rpn->xon_char = xon_char; | |
933 | rpn->xoff_char = xoff_char; | |
e8db8c99 | 934 | rpn->param_mask = cpu_to_le16(param_mask); |
1da177e4 LT |
935 | |
936 | *ptr = __fcs(buf); ptr++; | |
937 | ||
938 | return rfcomm_send_frame(s, buf, ptr - buf); | |
939 | } | |
940 | ||
941 | static int rfcomm_send_rls(struct rfcomm_session *s, int cr, u8 dlci, u8 status) | |
942 | { | |
943 | struct rfcomm_hdr *hdr; | |
944 | struct rfcomm_mcc *mcc; | |
945 | struct rfcomm_rls *rls; | |
946 | u8 buf[16], *ptr = buf; | |
947 | ||
948 | BT_DBG("%p cr %d status 0x%x", s, cr, status); | |
949 | ||
950 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
951 | hdr->addr = __addr(s->initiator, 0); | |
952 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
953 | hdr->len = __len8(sizeof(*mcc) + sizeof(*rls)); | |
954 | ||
955 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
956 | mcc->type = __mcc_type(cr, RFCOMM_RLS); | |
957 | mcc->len = __len8(sizeof(*rls)); | |
958 | ||
959 | rls = (void *) ptr; ptr += sizeof(*rls); | |
960 | rls->dlci = __addr(1, dlci); | |
961 | rls->status = status; | |
962 | ||
963 | *ptr = __fcs(buf); ptr++; | |
964 | ||
965 | return rfcomm_send_frame(s, buf, ptr - buf); | |
966 | } | |
967 | ||
968 | static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig) | |
969 | { | |
970 | struct rfcomm_hdr *hdr; | |
971 | struct rfcomm_mcc *mcc; | |
972 | struct rfcomm_msc *msc; | |
973 | u8 buf[16], *ptr = buf; | |
974 | ||
975 | BT_DBG("%p cr %d v24 0x%x", s, cr, v24_sig); | |
976 | ||
977 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
978 | hdr->addr = __addr(s->initiator, 0); | |
979 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
980 | hdr->len = __len8(sizeof(*mcc) + sizeof(*msc)); | |
981 | ||
982 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
983 | mcc->type = __mcc_type(cr, RFCOMM_MSC); | |
984 | mcc->len = __len8(sizeof(*msc)); | |
985 | ||
986 | msc = (void *) ptr; ptr += sizeof(*msc); | |
987 | msc->dlci = __addr(1, dlci); | |
988 | msc->v24_sig = v24_sig | 0x01; | |
989 | ||
990 | *ptr = __fcs(buf); ptr++; | |
991 | ||
992 | return rfcomm_send_frame(s, buf, ptr - buf); | |
993 | } | |
994 | ||
995 | static int rfcomm_send_fcoff(struct rfcomm_session *s, int cr) | |
996 | { | |
997 | struct rfcomm_hdr *hdr; | |
998 | struct rfcomm_mcc *mcc; | |
999 | u8 buf[16], *ptr = buf; | |
1000 | ||
1001 | BT_DBG("%p cr %d", s, cr); | |
1002 | ||
1003 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1004 | hdr->addr = __addr(s->initiator, 0); | |
1005 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1006 | hdr->len = __len8(sizeof(*mcc)); | |
1007 | ||
1008 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
1009 | mcc->type = __mcc_type(cr, RFCOMM_FCOFF); | |
1010 | mcc->len = __len8(0); | |
1011 | ||
1012 | *ptr = __fcs(buf); ptr++; | |
1013 | ||
1014 | return rfcomm_send_frame(s, buf, ptr - buf); | |
1015 | } | |
1016 | ||
1017 | static int rfcomm_send_fcon(struct rfcomm_session *s, int cr) | |
1018 | { | |
1019 | struct rfcomm_hdr *hdr; | |
1020 | struct rfcomm_mcc *mcc; | |
1021 | u8 buf[16], *ptr = buf; | |
1022 | ||
1023 | BT_DBG("%p cr %d", s, cr); | |
1024 | ||
1025 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1026 | hdr->addr = __addr(s->initiator, 0); | |
1027 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1028 | hdr->len = __len8(sizeof(*mcc)); | |
1029 | ||
1030 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
1031 | mcc->type = __mcc_type(cr, RFCOMM_FCON); | |
1032 | mcc->len = __len8(0); | |
1033 | ||
1034 | *ptr = __fcs(buf); ptr++; | |
1035 | ||
1036 | return rfcomm_send_frame(s, buf, ptr - buf); | |
1037 | } | |
1038 | ||
1039 | static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len) | |
1040 | { | |
1041 | struct socket *sock = s->sock; | |
1042 | struct kvec iv[3]; | |
1043 | struct msghdr msg; | |
1044 | unsigned char hdr[5], crc[1]; | |
1045 | ||
1046 | if (len > 125) | |
1047 | return -EINVAL; | |
1048 | ||
1049 | BT_DBG("%p cr %d", s, cr); | |
1050 | ||
1051 | hdr[0] = __addr(s->initiator, 0); | |
1052 | hdr[1] = __ctrl(RFCOMM_UIH, 0); | |
1053 | hdr[2] = 0x01 | ((len + 2) << 1); | |
1054 | hdr[3] = 0x01 | ((cr & 0x01) << 1) | (RFCOMM_TEST << 2); | |
1055 | hdr[4] = 0x01 | (len << 1); | |
1056 | ||
1057 | crc[0] = __fcs(hdr); | |
1058 | ||
1059 | iv[0].iov_base = hdr; | |
1060 | iv[0].iov_len = 5; | |
1061 | iv[1].iov_base = pattern; | |
1062 | iv[1].iov_len = len; | |
1063 | iv[2].iov_base = crc; | |
1064 | iv[2].iov_len = 1; | |
1065 | ||
1066 | memset(&msg, 0, sizeof(msg)); | |
1067 | ||
1068 | return kernel_sendmsg(sock, &msg, iv, 3, 6 + len); | |
1069 | } | |
1070 | ||
1071 | static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits) | |
1072 | { | |
1073 | struct rfcomm_hdr *hdr; | |
1074 | u8 buf[16], *ptr = buf; | |
1075 | ||
1076 | BT_DBG("%p addr %d credits %d", s, addr, credits); | |
1077 | ||
1078 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1079 | hdr->addr = addr; | |
1080 | hdr->ctrl = __ctrl(RFCOMM_UIH, 1); | |
1081 | hdr->len = __len8(0); | |
1082 | ||
1083 | *ptr = credits; ptr++; | |
1084 | ||
1085 | *ptr = __fcs(buf); ptr++; | |
1086 | ||
1087 | return rfcomm_send_frame(s, buf, ptr - buf); | |
1088 | } | |
1089 | ||
1090 | static void rfcomm_make_uih(struct sk_buff *skb, u8 addr) | |
1091 | { | |
1092 | struct rfcomm_hdr *hdr; | |
1093 | int len = skb->len; | |
1094 | u8 *crc; | |
1095 | ||
1096 | if (len > 127) { | |
1097 | hdr = (void *) skb_push(skb, 4); | |
b4324b5d | 1098 | put_unaligned(cpu_to_le16(__len16(len)), (__le16 *) &hdr->len); |
1da177e4 LT |
1099 | } else { |
1100 | hdr = (void *) skb_push(skb, 3); | |
1101 | hdr->len = __len8(len); | |
1102 | } | |
1103 | hdr->addr = addr; | |
1104 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1105 | ||
1106 | crc = skb_put(skb, 1); | |
1107 | *crc = __fcs((void *) hdr); | |
1108 | } | |
1109 | ||
1110 | /* ---- RFCOMM frame reception ---- */ | |
1111 | static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci) | |
1112 | { | |
1113 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1114 | ||
1115 | if (dlci) { | |
1116 | /* Data channel */ | |
1117 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1118 | if (!d) { | |
1119 | rfcomm_send_dm(s, dlci); | |
1120 | return 0; | |
1121 | } | |
1122 | ||
1123 | switch (d->state) { | |
1124 | case BT_CONNECT: | |
1125 | rfcomm_dlc_clear_timer(d); | |
1126 | ||
1127 | rfcomm_dlc_lock(d); | |
1128 | d->state = BT_CONNECTED; | |
1129 | d->state_change(d, 0); | |
1130 | rfcomm_dlc_unlock(d); | |
1131 | ||
1132 | rfcomm_send_msc(s, 1, dlci, d->v24_sig); | |
1133 | break; | |
1134 | ||
1135 | case BT_DISCONN: | |
1136 | d->state = BT_CLOSED; | |
1137 | __rfcomm_dlc_close(d, 0); | |
9cf5b0ea MH |
1138 | |
1139 | if (list_empty(&s->dlcs)) { | |
1140 | s->state = BT_DISCONN; | |
1141 | rfcomm_send_disc(s, 0); | |
1142 | } | |
1143 | ||
1da177e4 LT |
1144 | break; |
1145 | } | |
1146 | } else { | |
1147 | /* Control channel */ | |
1148 | switch (s->state) { | |
1149 | case BT_CONNECT: | |
1150 | s->state = BT_CONNECTED; | |
1151 | rfcomm_process_connect(s); | |
1152 | break; | |
9cf5b0ea MH |
1153 | |
1154 | case BT_DISCONN: | |
6c2718da NP |
1155 | /* When socket is closed and we are not RFCOMM |
1156 | * initiator rfcomm_process_rx already calls | |
1157 | * rfcomm_session_put() */ | |
1158 | if (s->sock->sk->sk_state != BT_CLOSED) | |
1159 | rfcomm_session_put(s); | |
9cf5b0ea | 1160 | break; |
1da177e4 LT |
1161 | } |
1162 | } | |
1163 | return 0; | |
1164 | } | |
1165 | ||
1166 | static int rfcomm_recv_dm(struct rfcomm_session *s, u8 dlci) | |
1167 | { | |
1168 | int err = 0; | |
1169 | ||
1170 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1171 | ||
1172 | if (dlci) { | |
1173 | /* Data DLC */ | |
1174 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1175 | if (d) { | |
1176 | if (d->state == BT_CONNECT || d->state == BT_CONFIG) | |
1177 | err = ECONNREFUSED; | |
1178 | else | |
1179 | err = ECONNRESET; | |
1180 | ||
1181 | d->state = BT_CLOSED; | |
1182 | __rfcomm_dlc_close(d, err); | |
1183 | } | |
1184 | } else { | |
1185 | if (s->state == BT_CONNECT) | |
1186 | err = ECONNREFUSED; | |
1187 | else | |
1188 | err = ECONNRESET; | |
1189 | ||
1190 | s->state = BT_CLOSED; | |
1191 | rfcomm_session_close(s, err); | |
1192 | } | |
1193 | return 0; | |
1194 | } | |
1195 | ||
1196 | static int rfcomm_recv_disc(struct rfcomm_session *s, u8 dlci) | |
1197 | { | |
1198 | int err = 0; | |
1199 | ||
1200 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1201 | ||
1202 | if (dlci) { | |
1203 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1204 | if (d) { | |
1205 | rfcomm_send_ua(s, dlci); | |
1206 | ||
1207 | if (d->state == BT_CONNECT || d->state == BT_CONFIG) | |
1208 | err = ECONNREFUSED; | |
1209 | else | |
1210 | err = ECONNRESET; | |
1211 | ||
1212 | d->state = BT_CLOSED; | |
1213 | __rfcomm_dlc_close(d, err); | |
8e87d142 | 1214 | } else |
1da177e4 | 1215 | rfcomm_send_dm(s, dlci); |
8e87d142 | 1216 | |
1da177e4 LT |
1217 | } else { |
1218 | rfcomm_send_ua(s, 0); | |
1219 | ||
1220 | if (s->state == BT_CONNECT) | |
1221 | err = ECONNREFUSED; | |
1222 | else | |
1223 | err = ECONNRESET; | |
1224 | ||
1225 | s->state = BT_CLOSED; | |
1226 | rfcomm_session_close(s, err); | |
1227 | } | |
1228 | ||
1229 | return 0; | |
1230 | } | |
1231 | ||
bb23c0ab | 1232 | void rfcomm_dlc_accept(struct rfcomm_dlc *d) |
1da177e4 | 1233 | { |
300b9397 MH |
1234 | struct sock *sk = d->session->sock->sk; |
1235 | ||
1da177e4 LT |
1236 | BT_DBG("dlc %p", d); |
1237 | ||
1238 | rfcomm_send_ua(d->session, d->dlci); | |
1239 | ||
e2139b32 JH |
1240 | rfcomm_dlc_clear_timer(d); |
1241 | ||
1da177e4 LT |
1242 | rfcomm_dlc_lock(d); |
1243 | d->state = BT_CONNECTED; | |
1244 | d->state_change(d, 0); | |
1245 | rfcomm_dlc_unlock(d); | |
1246 | ||
9f2c8a03 | 1247 | if (d->role_switch) |
300b9397 MH |
1248 | hci_conn_switch_role(l2cap_pi(sk)->conn->hcon, 0x00); |
1249 | ||
1da177e4 LT |
1250 | rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); |
1251 | } | |
1252 | ||
bb23c0ab MH |
1253 | static void rfcomm_check_accept(struct rfcomm_dlc *d) |
1254 | { | |
9f2c8a03 | 1255 | if (rfcomm_check_security(d)) { |
bb23c0ab MH |
1256 | if (d->defer_setup) { |
1257 | set_bit(RFCOMM_DEFER_SETUP, &d->flags); | |
1258 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8bf47941 MH |
1259 | |
1260 | rfcomm_dlc_lock(d); | |
1261 | d->state = BT_CONNECT2; | |
1262 | d->state_change(d, 0); | |
1263 | rfcomm_dlc_unlock(d); | |
bb23c0ab MH |
1264 | } else |
1265 | rfcomm_dlc_accept(d); | |
8c1b2355 MH |
1266 | } else { |
1267 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); | |
1268 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
bb23c0ab MH |
1269 | } |
1270 | } | |
1271 | ||
1da177e4 LT |
1272 | static int rfcomm_recv_sabm(struct rfcomm_session *s, u8 dlci) |
1273 | { | |
1274 | struct rfcomm_dlc *d; | |
1275 | u8 channel; | |
1276 | ||
1277 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1278 | ||
1279 | if (!dlci) { | |
1280 | rfcomm_send_ua(s, 0); | |
1281 | ||
1282 | if (s->state == BT_OPEN) { | |
1283 | s->state = BT_CONNECTED; | |
1284 | rfcomm_process_connect(s); | |
1285 | } | |
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | /* Check if DLC exists */ | |
1290 | d = rfcomm_dlc_get(s, dlci); | |
1291 | if (d) { | |
1292 | if (d->state == BT_OPEN) { | |
1293 | /* DLC was previously opened by PN request */ | |
bb23c0ab | 1294 | rfcomm_check_accept(d); |
1da177e4 LT |
1295 | } |
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | /* Notify socket layer about incoming connection */ | |
1300 | channel = __srv_channel(dlci); | |
1301 | if (rfcomm_connect_ind(s, channel, &d)) { | |
1302 | d->dlci = dlci; | |
1303 | d->addr = __addr(s->initiator, dlci); | |
1304 | rfcomm_dlc_link(s, d); | |
1305 | ||
bb23c0ab | 1306 | rfcomm_check_accept(d); |
1da177e4 LT |
1307 | } else { |
1308 | rfcomm_send_dm(s, dlci); | |
1309 | } | |
1310 | ||
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static int rfcomm_apply_pn(struct rfcomm_dlc *d, int cr, struct rfcomm_pn *pn) | |
1315 | { | |
1316 | struct rfcomm_session *s = d->session; | |
1317 | ||
8e87d142 | 1318 | BT_DBG("dlc %p state %ld dlci %d mtu %d fc 0x%x credits %d", |
1da177e4 LT |
1319 | d, d->state, d->dlci, pn->mtu, pn->flow_ctrl, pn->credits); |
1320 | ||
7c2660b0 MH |
1321 | if ((pn->flow_ctrl == 0xf0 && s->cfc != RFCOMM_CFC_DISABLED) || |
1322 | pn->flow_ctrl == 0xe0) { | |
1323 | d->cfc = RFCOMM_CFC_ENABLED; | |
1da177e4 LT |
1324 | d->tx_credits = pn->credits; |
1325 | } else { | |
7c2660b0 | 1326 | d->cfc = RFCOMM_CFC_DISABLED; |
1da177e4 LT |
1327 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); |
1328 | } | |
1329 | ||
7c2660b0 MH |
1330 | if (s->cfc == RFCOMM_CFC_UNKNOWN) |
1331 | s->cfc = d->cfc; | |
1332 | ||
1da177e4 LT |
1333 | d->priority = pn->priority; |
1334 | ||
b4324b5d | 1335 | d->mtu = __le16_to_cpu(pn->mtu); |
98bcd08b MH |
1336 | |
1337 | if (cr && d->mtu > s->mtu) | |
1338 | d->mtu = s->mtu; | |
1da177e4 LT |
1339 | |
1340 | return 0; | |
1341 | } | |
1342 | ||
1343 | static int rfcomm_recv_pn(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1344 | { | |
1345 | struct rfcomm_pn *pn = (void *) skb->data; | |
1346 | struct rfcomm_dlc *d; | |
1347 | u8 dlci = pn->dlci; | |
1348 | ||
1349 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1350 | ||
1351 | if (!dlci) | |
1352 | return 0; | |
1353 | ||
1354 | d = rfcomm_dlc_get(s, dlci); | |
1355 | if (d) { | |
1356 | if (cr) { | |
1357 | /* PN request */ | |
1358 | rfcomm_apply_pn(d, cr, pn); | |
1359 | rfcomm_send_pn(s, 0, d); | |
1360 | } else { | |
1361 | /* PN response */ | |
1362 | switch (d->state) { | |
1363 | case BT_CONFIG: | |
1364 | rfcomm_apply_pn(d, cr, pn); | |
1365 | ||
1366 | d->state = BT_CONNECT; | |
1367 | rfcomm_send_sabm(s, d->dlci); | |
1368 | break; | |
1369 | } | |
1370 | } | |
1371 | } else { | |
1372 | u8 channel = __srv_channel(dlci); | |
1373 | ||
1374 | if (!cr) | |
1375 | return 0; | |
1376 | ||
1377 | /* PN request for non existing DLC. | |
1378 | * Assume incoming connection. */ | |
1379 | if (rfcomm_connect_ind(s, channel, &d)) { | |
1380 | d->dlci = dlci; | |
1381 | d->addr = __addr(s->initiator, dlci); | |
1382 | rfcomm_dlc_link(s, d); | |
1383 | ||
1384 | rfcomm_apply_pn(d, cr, pn); | |
1385 | ||
1386 | d->state = BT_OPEN; | |
1387 | rfcomm_send_pn(s, 0, d); | |
1388 | } else { | |
1389 | rfcomm_send_dm(s, dlci); | |
1390 | } | |
1391 | } | |
1392 | return 0; | |
1393 | } | |
1394 | ||
1395 | static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_buff *skb) | |
1396 | { | |
1397 | struct rfcomm_rpn *rpn = (void *) skb->data; | |
1398 | u8 dlci = __get_dlci(rpn->dlci); | |
1399 | ||
1400 | u8 bit_rate = 0; | |
1401 | u8 data_bits = 0; | |
1402 | u8 stop_bits = 0; | |
1403 | u8 parity = 0; | |
1404 | u8 flow_ctrl = 0; | |
1405 | u8 xon_char = 0; | |
1406 | u8 xoff_char = 0; | |
1407 | u16 rpn_mask = RFCOMM_RPN_PM_ALL; | |
3a5e903c S |
1408 | |
1409 | 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", | |
1410 | dlci, cr, len, rpn->bit_rate, rpn->line_settings, rpn->flow_ctrl, | |
1411 | rpn->xon_char, rpn->xoff_char, rpn->param_mask); | |
1412 | ||
1413 | if (!cr) | |
1da177e4 | 1414 | return 0; |
3a5e903c | 1415 | |
1da177e4 | 1416 | if (len == 1) { |
3a5e903c | 1417 | /* This is a request, return default settings */ |
1da177e4 LT |
1418 | bit_rate = RFCOMM_RPN_BR_115200; |
1419 | data_bits = RFCOMM_RPN_DATA_8; | |
1420 | stop_bits = RFCOMM_RPN_STOP_1; | |
1421 | parity = RFCOMM_RPN_PARITY_NONE; | |
1422 | flow_ctrl = RFCOMM_RPN_FLOW_NONE; | |
1423 | xon_char = RFCOMM_RPN_XON_CHAR; | |
1424 | xoff_char = RFCOMM_RPN_XOFF_CHAR; | |
1da177e4 LT |
1425 | goto rpn_out; |
1426 | } | |
3a5e903c S |
1427 | |
1428 | /* Check for sane values, ignore/accept bit_rate, 8 bits, 1 stop bit, | |
1429 | * no parity, no flow control lines, normal XON/XOFF chars */ | |
1430 | ||
e8db8c99 | 1431 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_BITRATE)) { |
1da177e4 LT |
1432 | bit_rate = rpn->bit_rate; |
1433 | if (bit_rate != RFCOMM_RPN_BR_115200) { | |
1434 | BT_DBG("RPN bit rate mismatch 0x%x", bit_rate); | |
1435 | bit_rate = RFCOMM_RPN_BR_115200; | |
1436 | rpn_mask ^= RFCOMM_RPN_PM_BITRATE; | |
1437 | } | |
1438 | } | |
3a5e903c | 1439 | |
e8db8c99 | 1440 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_DATA)) { |
1da177e4 LT |
1441 | data_bits = __get_rpn_data_bits(rpn->line_settings); |
1442 | if (data_bits != RFCOMM_RPN_DATA_8) { | |
1443 | BT_DBG("RPN data bits mismatch 0x%x", data_bits); | |
1444 | data_bits = RFCOMM_RPN_DATA_8; | |
1445 | rpn_mask ^= RFCOMM_RPN_PM_DATA; | |
1446 | } | |
1447 | } | |
3a5e903c | 1448 | |
e8db8c99 | 1449 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_STOP)) { |
1da177e4 LT |
1450 | stop_bits = __get_rpn_stop_bits(rpn->line_settings); |
1451 | if (stop_bits != RFCOMM_RPN_STOP_1) { | |
1452 | BT_DBG("RPN stop bits mismatch 0x%x", stop_bits); | |
1453 | stop_bits = RFCOMM_RPN_STOP_1; | |
1454 | rpn_mask ^= RFCOMM_RPN_PM_STOP; | |
1455 | } | |
1456 | } | |
3a5e903c | 1457 | |
e8db8c99 | 1458 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_PARITY)) { |
1da177e4 LT |
1459 | parity = __get_rpn_parity(rpn->line_settings); |
1460 | if (parity != RFCOMM_RPN_PARITY_NONE) { | |
1461 | BT_DBG("RPN parity mismatch 0x%x", parity); | |
1462 | parity = RFCOMM_RPN_PARITY_NONE; | |
1463 | rpn_mask ^= RFCOMM_RPN_PM_PARITY; | |
1464 | } | |
1465 | } | |
3a5e903c | 1466 | |
e8db8c99 | 1467 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_FLOW)) { |
1da177e4 LT |
1468 | flow_ctrl = rpn->flow_ctrl; |
1469 | if (flow_ctrl != RFCOMM_RPN_FLOW_NONE) { | |
1470 | BT_DBG("RPN flow ctrl mismatch 0x%x", flow_ctrl); | |
1471 | flow_ctrl = RFCOMM_RPN_FLOW_NONE; | |
1472 | rpn_mask ^= RFCOMM_RPN_PM_FLOW; | |
1473 | } | |
1474 | } | |
3a5e903c | 1475 | |
e8db8c99 | 1476 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XON)) { |
1da177e4 LT |
1477 | xon_char = rpn->xon_char; |
1478 | if (xon_char != RFCOMM_RPN_XON_CHAR) { | |
1479 | BT_DBG("RPN XON char mismatch 0x%x", xon_char); | |
1480 | xon_char = RFCOMM_RPN_XON_CHAR; | |
1481 | rpn_mask ^= RFCOMM_RPN_PM_XON; | |
1482 | } | |
1483 | } | |
3a5e903c | 1484 | |
e8db8c99 | 1485 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XOFF)) { |
1da177e4 LT |
1486 | xoff_char = rpn->xoff_char; |
1487 | if (xoff_char != RFCOMM_RPN_XOFF_CHAR) { | |
1488 | BT_DBG("RPN XOFF char mismatch 0x%x", xoff_char); | |
1489 | xoff_char = RFCOMM_RPN_XOFF_CHAR; | |
1490 | rpn_mask ^= RFCOMM_RPN_PM_XOFF; | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | rpn_out: | |
3a5e903c S |
1495 | rfcomm_send_rpn(s, 0, dlci, bit_rate, data_bits, stop_bits, |
1496 | parity, flow_ctrl, xon_char, xoff_char, rpn_mask); | |
1da177e4 LT |
1497 | |
1498 | return 0; | |
1499 | } | |
1500 | ||
1501 | static int rfcomm_recv_rls(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1502 | { | |
1503 | struct rfcomm_rls *rls = (void *) skb->data; | |
1504 | u8 dlci = __get_dlci(rls->dlci); | |
1505 | ||
1506 | BT_DBG("dlci %d cr %d status 0x%x", dlci, cr, rls->status); | |
3a5e903c | 1507 | |
1da177e4 LT |
1508 | if (!cr) |
1509 | return 0; | |
1510 | ||
3a5e903c S |
1511 | /* We should probably do something with this information here. But |
1512 | * for now it's sufficient just to reply -- Bluetooth 1.1 says it's | |
1513 | * mandatory to recognise and respond to RLS */ | |
1da177e4 LT |
1514 | |
1515 | rfcomm_send_rls(s, 0, dlci, rls->status); | |
1516 | ||
1517 | return 0; | |
1518 | } | |
1519 | ||
1520 | static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1521 | { | |
1522 | struct rfcomm_msc *msc = (void *) skb->data; | |
1523 | struct rfcomm_dlc *d; | |
1524 | u8 dlci = __get_dlci(msc->dlci); | |
1525 | ||
1526 | BT_DBG("dlci %d cr %d v24 0x%x", dlci, cr, msc->v24_sig); | |
1527 | ||
1528 | d = rfcomm_dlc_get(s, dlci); | |
3a5e903c | 1529 | if (!d) |
1da177e4 LT |
1530 | return 0; |
1531 | ||
1532 | if (cr) { | |
1533 | if (msc->v24_sig & RFCOMM_V24_FC && !d->cfc) | |
1534 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1535 | else | |
1536 | clear_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
3a5e903c | 1537 | |
1da177e4 | 1538 | rfcomm_dlc_lock(d); |
8b6b3da7 MH |
1539 | |
1540 | d->remote_v24_sig = msc->v24_sig; | |
1541 | ||
1da177e4 LT |
1542 | if (d->modem_status) |
1543 | d->modem_status(d, msc->v24_sig); | |
8b6b3da7 | 1544 | |
1da177e4 | 1545 | rfcomm_dlc_unlock(d); |
8e87d142 | 1546 | |
1da177e4 LT |
1547 | rfcomm_send_msc(s, 0, dlci, msc->v24_sig); |
1548 | ||
1549 | d->mscex |= RFCOMM_MSCEX_RX; | |
3a5e903c | 1550 | } else |
1da177e4 LT |
1551 | d->mscex |= RFCOMM_MSCEX_TX; |
1552 | ||
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | static int rfcomm_recv_mcc(struct rfcomm_session *s, struct sk_buff *skb) | |
1557 | { | |
1558 | struct rfcomm_mcc *mcc = (void *) skb->data; | |
1559 | u8 type, cr, len; | |
1560 | ||
1561 | cr = __test_cr(mcc->type); | |
1562 | type = __get_mcc_type(mcc->type); | |
1563 | len = __get_mcc_len(mcc->len); | |
1564 | ||
1565 | BT_DBG("%p type 0x%x cr %d", s, type, cr); | |
1566 | ||
1567 | skb_pull(skb, 2); | |
1568 | ||
1569 | switch (type) { | |
1570 | case RFCOMM_PN: | |
1571 | rfcomm_recv_pn(s, cr, skb); | |
1572 | break; | |
1573 | ||
1574 | case RFCOMM_RPN: | |
1575 | rfcomm_recv_rpn(s, cr, len, skb); | |
1576 | break; | |
1577 | ||
1578 | case RFCOMM_RLS: | |
1579 | rfcomm_recv_rls(s, cr, skb); | |
1580 | break; | |
1581 | ||
1582 | case RFCOMM_MSC: | |
1583 | rfcomm_recv_msc(s, cr, skb); | |
1584 | break; | |
1585 | ||
1586 | case RFCOMM_FCOFF: | |
1587 | if (cr) { | |
1588 | set_bit(RFCOMM_TX_THROTTLED, &s->flags); | |
1589 | rfcomm_send_fcoff(s, 0); | |
1590 | } | |
1591 | break; | |
1592 | ||
1593 | case RFCOMM_FCON: | |
1594 | if (cr) { | |
1595 | clear_bit(RFCOMM_TX_THROTTLED, &s->flags); | |
1596 | rfcomm_send_fcon(s, 0); | |
1597 | } | |
1598 | break; | |
1599 | ||
1600 | case RFCOMM_TEST: | |
1601 | if (cr) | |
1602 | rfcomm_send_test(s, 0, skb->data, skb->len); | |
1603 | break; | |
1604 | ||
1605 | case RFCOMM_NSC: | |
1606 | break; | |
1607 | ||
1608 | default: | |
1609 | BT_ERR("Unknown control type 0x%02x", type); | |
1610 | rfcomm_send_nsc(s, cr, type); | |
1611 | break; | |
1612 | } | |
1613 | return 0; | |
1614 | } | |
1615 | ||
1616 | static int rfcomm_recv_data(struct rfcomm_session *s, u8 dlci, int pf, struct sk_buff *skb) | |
1617 | { | |
1618 | struct rfcomm_dlc *d; | |
1619 | ||
1620 | BT_DBG("session %p state %ld dlci %d pf %d", s, s->state, dlci, pf); | |
1621 | ||
1622 | d = rfcomm_dlc_get(s, dlci); | |
1623 | if (!d) { | |
1624 | rfcomm_send_dm(s, dlci); | |
1625 | goto drop; | |
1626 | } | |
1627 | ||
1628 | if (pf && d->cfc) { | |
1629 | u8 credits = *(u8 *) skb->data; skb_pull(skb, 1); | |
1630 | ||
1631 | d->tx_credits += credits; | |
1632 | if (d->tx_credits) | |
1633 | clear_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1634 | } | |
1635 | ||
1636 | if (skb->len && d->state == BT_CONNECTED) { | |
1637 | rfcomm_dlc_lock(d); | |
1638 | d->rx_credits--; | |
1639 | d->data_ready(d, skb); | |
1640 | rfcomm_dlc_unlock(d); | |
1641 | return 0; | |
1642 | } | |
1643 | ||
1644 | drop: | |
1645 | kfree_skb(skb); | |
1646 | return 0; | |
1647 | } | |
1648 | ||
1649 | static int rfcomm_recv_frame(struct rfcomm_session *s, struct sk_buff *skb) | |
1650 | { | |
1651 | struct rfcomm_hdr *hdr = (void *) skb->data; | |
1652 | u8 type, dlci, fcs; | |
1653 | ||
1654 | dlci = __get_dlci(hdr->addr); | |
1655 | type = __get_type(hdr->ctrl); | |
1656 | ||
1657 | /* Trim FCS */ | |
1658 | skb->len--; skb->tail--; | |
27a884dc | 1659 | fcs = *(u8 *)skb_tail_pointer(skb); |
1da177e4 LT |
1660 | |
1661 | if (__check_fcs(skb->data, type, fcs)) { | |
1662 | BT_ERR("bad checksum in packet"); | |
1663 | kfree_skb(skb); | |
1664 | return -EILSEQ; | |
1665 | } | |
1666 | ||
1667 | if (__test_ea(hdr->len)) | |
1668 | skb_pull(skb, 3); | |
1669 | else | |
1670 | skb_pull(skb, 4); | |
1671 | ||
1672 | switch (type) { | |
1673 | case RFCOMM_SABM: | |
1674 | if (__test_pf(hdr->ctrl)) | |
1675 | rfcomm_recv_sabm(s, dlci); | |
1676 | break; | |
1677 | ||
1678 | case RFCOMM_DISC: | |
1679 | if (__test_pf(hdr->ctrl)) | |
1680 | rfcomm_recv_disc(s, dlci); | |
1681 | break; | |
1682 | ||
1683 | case RFCOMM_UA: | |
1684 | if (__test_pf(hdr->ctrl)) | |
1685 | rfcomm_recv_ua(s, dlci); | |
1686 | break; | |
1687 | ||
1688 | case RFCOMM_DM: | |
1689 | rfcomm_recv_dm(s, dlci); | |
1690 | break; | |
1691 | ||
1692 | case RFCOMM_UIH: | |
1693 | if (dlci) | |
1694 | return rfcomm_recv_data(s, dlci, __test_pf(hdr->ctrl), skb); | |
1695 | ||
1696 | rfcomm_recv_mcc(s, skb); | |
1697 | break; | |
1698 | ||
1699 | default: | |
1700 | BT_ERR("Unknown packet type 0x%02x\n", type); | |
1701 | break; | |
1702 | } | |
1703 | kfree_skb(skb); | |
1704 | return 0; | |
1705 | } | |
1706 | ||
1707 | /* ---- Connection and data processing ---- */ | |
1708 | ||
1709 | static void rfcomm_process_connect(struct rfcomm_session *s) | |
1710 | { | |
1711 | struct rfcomm_dlc *d; | |
1712 | struct list_head *p, *n; | |
1713 | ||
1714 | BT_DBG("session %p state %ld", s, s->state); | |
1715 | ||
1716 | list_for_each_safe(p, n, &s->dlcs) { | |
1717 | d = list_entry(p, struct rfcomm_dlc, list); | |
1718 | if (d->state == BT_CONFIG) { | |
1719 | d->mtu = s->mtu; | |
9f2c8a03 | 1720 | if (rfcomm_check_security(d)) { |
8c1b2355 MH |
1721 | rfcomm_send_pn(s, 1, d); |
1722 | } else { | |
77db1980 MH |
1723 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); |
1724 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8c1b2355 | 1725 | } |
1da177e4 LT |
1726 | } |
1727 | } | |
1728 | } | |
1729 | ||
1730 | /* Send data queued for the DLC. | |
1731 | * Return number of frames left in the queue. | |
1732 | */ | |
1733 | static inline int rfcomm_process_tx(struct rfcomm_dlc *d) | |
1734 | { | |
1735 | struct sk_buff *skb; | |
1736 | int err; | |
1737 | ||
8e87d142 | 1738 | BT_DBG("dlc %p state %ld cfc %d rx_credits %d tx_credits %d", |
1da177e4 LT |
1739 | d, d->state, d->cfc, d->rx_credits, d->tx_credits); |
1740 | ||
1741 | /* Send pending MSC */ | |
1742 | if (test_and_clear_bit(RFCOMM_MSC_PENDING, &d->flags)) | |
8e87d142 | 1743 | rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); |
1da177e4 LT |
1744 | |
1745 | if (d->cfc) { | |
8e87d142 | 1746 | /* CFC enabled. |
1da177e4 LT |
1747 | * Give them some credits */ |
1748 | if (!test_bit(RFCOMM_RX_THROTTLED, &d->flags) && | |
8e87d142 | 1749 | d->rx_credits <= (d->cfc >> 2)) { |
1da177e4 LT |
1750 | rfcomm_send_credits(d->session, d->addr, d->cfc - d->rx_credits); |
1751 | d->rx_credits = d->cfc; | |
1752 | } | |
1753 | } else { | |
1754 | /* CFC disabled. | |
1755 | * Give ourselves some credits */ | |
1756 | d->tx_credits = 5; | |
1757 | } | |
1758 | ||
1759 | if (test_bit(RFCOMM_TX_THROTTLED, &d->flags)) | |
1760 | return skb_queue_len(&d->tx_queue); | |
1761 | ||
1762 | while (d->tx_credits && (skb = skb_dequeue(&d->tx_queue))) { | |
1763 | err = rfcomm_send_frame(d->session, skb->data, skb->len); | |
1764 | if (err < 0) { | |
1765 | skb_queue_head(&d->tx_queue, skb); | |
1766 | break; | |
1767 | } | |
1768 | kfree_skb(skb); | |
1769 | d->tx_credits--; | |
1770 | } | |
1771 | ||
1772 | if (d->cfc && !d->tx_credits) { | |
1773 | /* We're out of TX credits. | |
1774 | * Set TX_THROTTLED flag to avoid unnesary wakeups by dlc_send. */ | |
1775 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1776 | } | |
1777 | ||
1778 | return skb_queue_len(&d->tx_queue); | |
1779 | } | |
1780 | ||
1781 | static inline void rfcomm_process_dlcs(struct rfcomm_session *s) | |
1782 | { | |
1783 | struct rfcomm_dlc *d; | |
1784 | struct list_head *p, *n; | |
1785 | ||
1786 | BT_DBG("session %p state %ld", s, s->state); | |
1787 | ||
1788 | list_for_each_safe(p, n, &s->dlcs) { | |
1789 | d = list_entry(p, struct rfcomm_dlc, list); | |
1790 | ||
1791 | if (test_bit(RFCOMM_TIMED_OUT, &d->flags)) { | |
1792 | __rfcomm_dlc_close(d, ETIMEDOUT); | |
1793 | continue; | |
1794 | } | |
1795 | ||
1796 | if (test_and_clear_bit(RFCOMM_AUTH_ACCEPT, &d->flags)) { | |
1797 | rfcomm_dlc_clear_timer(d); | |
77db1980 MH |
1798 | if (d->out) { |
1799 | rfcomm_send_pn(s, 1, d); | |
1800 | rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT); | |
bb23c0ab MH |
1801 | } else { |
1802 | if (d->defer_setup) { | |
1803 | set_bit(RFCOMM_DEFER_SETUP, &d->flags); | |
1804 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8bf47941 MH |
1805 | |
1806 | rfcomm_dlc_lock(d); | |
1807 | d->state = BT_CONNECT2; | |
1808 | d->state_change(d, 0); | |
1809 | rfcomm_dlc_unlock(d); | |
bb23c0ab MH |
1810 | } else |
1811 | rfcomm_dlc_accept(d); | |
1812 | } | |
1da177e4 LT |
1813 | continue; |
1814 | } else if (test_and_clear_bit(RFCOMM_AUTH_REJECT, &d->flags)) { | |
1815 | rfcomm_dlc_clear_timer(d); | |
77db1980 MH |
1816 | if (!d->out) |
1817 | rfcomm_send_dm(s, d->dlci); | |
1818 | else | |
1819 | d->state = BT_CLOSED; | |
1da177e4 LT |
1820 | __rfcomm_dlc_close(d, ECONNREFUSED); |
1821 | continue; | |
1822 | } | |
1823 | ||
6e1031a4 JG |
1824 | if (test_bit(RFCOMM_SEC_PENDING, &d->flags)) |
1825 | continue; | |
1826 | ||
1da177e4 LT |
1827 | if (test_bit(RFCOMM_TX_THROTTLED, &s->flags)) |
1828 | continue; | |
1829 | ||
1830 | if ((d->state == BT_CONNECTED || d->state == BT_DISCONN) && | |
77db1980 | 1831 | d->mscex == RFCOMM_MSCEX_OK) |
1da177e4 LT |
1832 | rfcomm_process_tx(d); |
1833 | } | |
1834 | } | |
1835 | ||
1836 | static inline void rfcomm_process_rx(struct rfcomm_session *s) | |
1837 | { | |
1838 | struct socket *sock = s->sock; | |
1839 | struct sock *sk = sock->sk; | |
1840 | struct sk_buff *skb; | |
1841 | ||
1842 | BT_DBG("session %p state %ld qlen %d", s, s->state, skb_queue_len(&sk->sk_receive_queue)); | |
1843 | ||
1844 | /* Get data directly from socket receive queue without copying it. */ | |
1845 | while ((skb = skb_dequeue(&sk->sk_receive_queue))) { | |
1846 | skb_orphan(skb); | |
1847 | rfcomm_recv_frame(s, skb); | |
1848 | } | |
1849 | ||
1850 | if (sk->sk_state == BT_CLOSED) { | |
1851 | if (!s->initiator) | |
1852 | rfcomm_session_put(s); | |
1853 | ||
1854 | rfcomm_session_close(s, sk->sk_err); | |
1855 | } | |
1856 | } | |
1857 | ||
1858 | static inline void rfcomm_accept_connection(struct rfcomm_session *s) | |
1859 | { | |
1860 | struct socket *sock = s->sock, *nsock; | |
1861 | int err; | |
1862 | ||
1863 | /* Fast check for a new connection. | |
1864 | * Avoids unnesesary socket allocations. */ | |
1865 | if (list_empty(&bt_sk(sock->sk)->accept_q)) | |
1866 | return; | |
1867 | ||
1868 | BT_DBG("session %p", s); | |
1869 | ||
48db9ca4 MH |
1870 | err = kernel_accept(sock, &nsock, O_NONBLOCK); |
1871 | if (err < 0) | |
1da177e4 LT |
1872 | return; |
1873 | ||
1da177e4 LT |
1874 | /* Set our callbacks */ |
1875 | nsock->sk->sk_data_ready = rfcomm_l2data_ready; | |
1876 | nsock->sk->sk_state_change = rfcomm_l2state_change; | |
1877 | ||
1878 | s = rfcomm_session_add(nsock, BT_OPEN); | |
1879 | if (s) { | |
1880 | rfcomm_session_hold(s); | |
98bcd08b MH |
1881 | |
1882 | /* We should adjust MTU on incoming sessions. | |
1883 | * L2CAP MTU minus UIH header and FCS. */ | |
1884 | s->mtu = min(l2cap_pi(nsock->sk)->omtu, l2cap_pi(nsock->sk)->imtu) - 5; | |
1885 | ||
1da177e4 LT |
1886 | rfcomm_schedule(RFCOMM_SCHED_RX); |
1887 | } else | |
1888 | sock_release(nsock); | |
1889 | } | |
1890 | ||
1891 | static inline void rfcomm_check_connection(struct rfcomm_session *s) | |
1892 | { | |
1893 | struct sock *sk = s->sock->sk; | |
1894 | ||
1895 | BT_DBG("%p state %ld", s, s->state); | |
1896 | ||
1897 | switch(sk->sk_state) { | |
1898 | case BT_CONNECTED: | |
1899 | s->state = BT_CONNECT; | |
1900 | ||
1901 | /* We can adjust MTU on outgoing sessions. | |
1902 | * L2CAP MTU minus UIH header and FCS. */ | |
1903 | s->mtu = min(l2cap_pi(sk)->omtu, l2cap_pi(sk)->imtu) - 5; | |
1904 | ||
1905 | rfcomm_send_sabm(s, 0); | |
1906 | break; | |
1907 | ||
1908 | case BT_CLOSED: | |
1909 | s->state = BT_CLOSED; | |
1910 | rfcomm_session_close(s, sk->sk_err); | |
1911 | break; | |
1912 | } | |
1913 | } | |
1914 | ||
1915 | static inline void rfcomm_process_sessions(void) | |
1916 | { | |
1917 | struct list_head *p, *n; | |
1918 | ||
1919 | rfcomm_lock(); | |
1920 | ||
1921 | list_for_each_safe(p, n, &session_list) { | |
1922 | struct rfcomm_session *s; | |
1923 | s = list_entry(p, struct rfcomm_session, list); | |
1924 | ||
9e726b17 LAD |
1925 | if (test_and_clear_bit(RFCOMM_TIMED_OUT, &s->flags)) { |
1926 | s->state = BT_DISCONN; | |
1927 | rfcomm_send_disc(s, 0); | |
485f1eff | 1928 | rfcomm_session_put(s); |
9e726b17 LAD |
1929 | continue; |
1930 | } | |
1931 | ||
1da177e4 LT |
1932 | if (s->state == BT_LISTEN) { |
1933 | rfcomm_accept_connection(s); | |
1934 | continue; | |
1935 | } | |
1936 | ||
1937 | rfcomm_session_hold(s); | |
1938 | ||
1939 | switch (s->state) { | |
1940 | case BT_BOUND: | |
1941 | rfcomm_check_connection(s); | |
1942 | break; | |
1943 | ||
1944 | default: | |
1945 | rfcomm_process_rx(s); | |
1946 | break; | |
1947 | } | |
1948 | ||
1949 | rfcomm_process_dlcs(s); | |
1950 | ||
1951 | rfcomm_session_put(s); | |
1952 | } | |
1953 | ||
1954 | rfcomm_unlock(); | |
1955 | } | |
1956 | ||
1da177e4 LT |
1957 | static int rfcomm_add_listener(bdaddr_t *ba) |
1958 | { | |
1959 | struct sockaddr_l2 addr; | |
1960 | struct socket *sock; | |
1961 | struct sock *sk; | |
1962 | struct rfcomm_session *s; | |
1963 | int err = 0; | |
1964 | ||
1965 | /* Create socket */ | |
1966 | err = rfcomm_l2sock_create(&sock); | |
8e87d142 | 1967 | if (err < 0) { |
1da177e4 LT |
1968 | BT_ERR("Create socket failed %d", err); |
1969 | return err; | |
1970 | } | |
1971 | ||
1972 | /* Bind socket */ | |
1973 | bacpy(&addr.l2_bdaddr, ba); | |
1974 | addr.l2_family = AF_BLUETOOTH; | |
b4324b5d | 1975 | addr.l2_psm = cpu_to_le16(RFCOMM_PSM); |
37e62f55 | 1976 | addr.l2_cid = 0; |
48db9ca4 | 1977 | err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); |
1da177e4 LT |
1978 | if (err < 0) { |
1979 | BT_ERR("Bind failed %d", err); | |
1980 | goto failed; | |
1981 | } | |
1982 | ||
1983 | /* Set L2CAP options */ | |
1984 | sk = sock->sk; | |
1985 | lock_sock(sk); | |
56f3a40a | 1986 | l2cap_pi(sk)->imtu = l2cap_mtu; |
1da177e4 LT |
1987 | release_sock(sk); |
1988 | ||
1989 | /* Start listening on the socket */ | |
48db9ca4 | 1990 | err = kernel_listen(sock, 10); |
1da177e4 LT |
1991 | if (err) { |
1992 | BT_ERR("Listen failed %d", err); | |
1993 | goto failed; | |
1994 | } | |
1995 | ||
1996 | /* Add listening session */ | |
1997 | s = rfcomm_session_add(sock, BT_LISTEN); | |
1998 | if (!s) | |
1999 | goto failed; | |
2000 | ||
2001 | rfcomm_session_hold(s); | |
2002 | return 0; | |
2003 | failed: | |
2004 | sock_release(sock); | |
2005 | return err; | |
2006 | } | |
2007 | ||
2008 | static void rfcomm_kill_listener(void) | |
2009 | { | |
2010 | struct rfcomm_session *s; | |
2011 | struct list_head *p, *n; | |
2012 | ||
2013 | BT_DBG(""); | |
2014 | ||
2015 | list_for_each_safe(p, n, &session_list) { | |
2016 | s = list_entry(p, struct rfcomm_session, list); | |
2017 | rfcomm_session_del(s); | |
2018 | } | |
2019 | } | |
2020 | ||
2021 | static int rfcomm_run(void *unused) | |
2022 | { | |
a524eccc | 2023 | BT_DBG(""); |
1da177e4 | 2024 | |
1da177e4 | 2025 | set_user_nice(current, -10); |
1da177e4 | 2026 | |
1da177e4 LT |
2027 | rfcomm_add_listener(BDADDR_ANY); |
2028 | ||
a524eccc MH |
2029 | while (!kthread_should_stop()) { |
2030 | set_current_state(TASK_INTERRUPTIBLE); | |
2031 | if (!test_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event)) { | |
2032 | /* No pending events. Let's sleep. | |
2033 | * Incoming connections and data will wake us up. */ | |
2034 | schedule(); | |
2035 | } | |
2036 | set_current_state(TASK_RUNNING); | |
2037 | ||
2038 | /* Process stuff */ | |
2039 | clear_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event); | |
2040 | rfcomm_process_sessions(); | |
2041 | } | |
1da177e4 LT |
2042 | |
2043 | rfcomm_kill_listener(); | |
2044 | ||
1da177e4 LT |
2045 | return 0; |
2046 | } | |
2047 | ||
8c1b2355 | 2048 | static void rfcomm_security_cfm(struct hci_conn *conn, u8 status, u8 encrypt) |
1da177e4 LT |
2049 | { |
2050 | struct rfcomm_session *s; | |
2051 | struct rfcomm_dlc *d; | |
2052 | struct list_head *p, *n; | |
2053 | ||
2054 | BT_DBG("conn %p status 0x%02x encrypt 0x%02x", conn, status, encrypt); | |
2055 | ||
2056 | s = rfcomm_session_get(&conn->hdev->bdaddr, &conn->dst); | |
2057 | if (!s) | |
2058 | return; | |
2059 | ||
2060 | rfcomm_session_hold(s); | |
2061 | ||
2062 | list_for_each_safe(p, n, &s->dlcs) { | |
2063 | d = list_entry(p, struct rfcomm_dlc, list); | |
2064 | ||
8c84b830 MH |
2065 | if (test_and_clear_bit(RFCOMM_SEC_PENDING, &d->flags)) { |
2066 | rfcomm_dlc_clear_timer(d); | |
2067 | if (status || encrypt == 0x00) { | |
2068 | __rfcomm_dlc_close(d, ECONNREFUSED); | |
2069 | continue; | |
2070 | } | |
2071 | } | |
2072 | ||
2073 | if (d->state == BT_CONNECTED && !status && encrypt == 0x00) { | |
2074 | if (d->sec_level == BT_SECURITY_MEDIUM) { | |
2075 | set_bit(RFCOMM_SEC_PENDING, &d->flags); | |
2076 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
2077 | continue; | |
2078 | } else if (d->sec_level == BT_SECURITY_HIGH) { | |
2079 | __rfcomm_dlc_close(d, ECONNREFUSED); | |
2080 | continue; | |
2081 | } | |
9719f8af MH |
2082 | } |
2083 | ||
1da177e4 LT |
2084 | if (!test_and_clear_bit(RFCOMM_AUTH_PENDING, &d->flags)) |
2085 | continue; | |
2086 | ||
8c1b2355 | 2087 | if (!status) |
1da177e4 LT |
2088 | set_bit(RFCOMM_AUTH_ACCEPT, &d->flags); |
2089 | else | |
2090 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
2091 | } | |
2092 | ||
2093 | rfcomm_session_put(s); | |
2094 | ||
2095 | rfcomm_schedule(RFCOMM_SCHED_AUTH); | |
2096 | } | |
2097 | ||
2098 | static struct hci_cb rfcomm_cb = { | |
2099 | .name = "RFCOMM", | |
8c1b2355 | 2100 | .security_cfm = rfcomm_security_cfm |
1da177e4 LT |
2101 | }; |
2102 | ||
aef7d97c | 2103 | static int rfcomm_dlc_debugfs_show(struct seq_file *f, void *x) |
1da177e4 LT |
2104 | { |
2105 | struct rfcomm_session *s; | |
2106 | struct list_head *pp, *p; | |
1da177e4 LT |
2107 | |
2108 | rfcomm_lock(); | |
2109 | ||
2110 | list_for_each(p, &session_list) { | |
2111 | s = list_entry(p, struct rfcomm_session, list); | |
be9d1227 MH |
2112 | list_for_each(pp, &s->dlcs) { |
2113 | struct sock *sk = s->sock->sk; | |
2114 | struct rfcomm_dlc *d = list_entry(pp, struct rfcomm_dlc, list); | |
1da177e4 | 2115 | |
aef7d97c MH |
2116 | seq_printf(f, "%s %s %ld %d %d %d %d\n", |
2117 | batostr(&bt_sk(sk)->src), | |
2118 | batostr(&bt_sk(sk)->dst), | |
2119 | d->state, d->dlci, d->mtu, | |
2120 | d->rx_credits, d->tx_credits); | |
1da177e4 LT |
2121 | } |
2122 | } | |
1da177e4 | 2123 | |
1da177e4 | 2124 | rfcomm_unlock(); |
1da177e4 | 2125 | |
aef7d97c MH |
2126 | return 0; |
2127 | } | |
2128 | ||
2129 | static int rfcomm_dlc_debugfs_open(struct inode *inode, struct file *file) | |
2130 | { | |
2131 | return single_open(file, rfcomm_dlc_debugfs_show, inode->i_private); | |
1da177e4 LT |
2132 | } |
2133 | ||
aef7d97c MH |
2134 | static const struct file_operations rfcomm_dlc_debugfs_fops = { |
2135 | .open = rfcomm_dlc_debugfs_open, | |
2136 | .read = seq_read, | |
2137 | .llseek = seq_lseek, | |
2138 | .release = single_release, | |
2139 | }; | |
2140 | ||
2141 | static struct dentry *rfcomm_dlc_debugfs; | |
1da177e4 LT |
2142 | |
2143 | /* ---- Initialization ---- */ | |
2144 | static int __init rfcomm_init(void) | |
2145 | { | |
52d18347 | 2146 | int err; |
af0d3b10 | 2147 | |
1da177e4 LT |
2148 | l2cap_load(); |
2149 | ||
2150 | hci_register_cb(&rfcomm_cb); | |
2151 | ||
a524eccc MH |
2152 | rfcomm_thread = kthread_run(rfcomm_run, NULL, "krfcommd"); |
2153 | if (IS_ERR(rfcomm_thread)) { | |
52d18347 MH |
2154 | err = PTR_ERR(rfcomm_thread); |
2155 | goto unregister; | |
a524eccc | 2156 | } |
1da177e4 | 2157 | |
aef7d97c MH |
2158 | if (bt_debugfs) { |
2159 | rfcomm_dlc_debugfs = debugfs_create_file("rfcomm_dlc", 0444, | |
2160 | bt_debugfs, NULL, &rfcomm_dlc_debugfs_fops); | |
2161 | if (!rfcomm_dlc_debugfs) | |
2162 | BT_ERR("Failed to create RFCOMM debug file"); | |
2163 | } | |
1da177e4 | 2164 | |
52d18347 MH |
2165 | err = rfcomm_init_ttys(); |
2166 | if (err < 0) | |
2167 | goto stop; | |
1da177e4 | 2168 | |
52d18347 MH |
2169 | err = rfcomm_init_sockets(); |
2170 | if (err < 0) | |
2171 | goto cleanup; | |
1da177e4 | 2172 | |
be9d1227 MH |
2173 | BT_INFO("RFCOMM ver %s", VERSION); |
2174 | ||
1da177e4 | 2175 | return 0; |
af0d3b10 | 2176 | |
52d18347 | 2177 | cleanup: |
af0d3b10 | 2178 | rfcomm_cleanup_ttys(); |
52d18347 MH |
2179 | |
2180 | stop: | |
af0d3b10 | 2181 | kthread_stop(rfcomm_thread); |
52d18347 MH |
2182 | |
2183 | unregister: | |
af0d3b10 DY |
2184 | hci_unregister_cb(&rfcomm_cb); |
2185 | ||
52d18347 | 2186 | return err; |
1da177e4 LT |
2187 | } |
2188 | ||
2189 | static void __exit rfcomm_exit(void) | |
2190 | { | |
aef7d97c | 2191 | debugfs_remove(rfcomm_dlc_debugfs); |
be9d1227 | 2192 | |
1da177e4 LT |
2193 | hci_unregister_cb(&rfcomm_cb); |
2194 | ||
a524eccc | 2195 | kthread_stop(rfcomm_thread); |
1da177e4 | 2196 | |
1da177e4 | 2197 | rfcomm_cleanup_ttys(); |
1da177e4 LT |
2198 | |
2199 | rfcomm_cleanup_sockets(); | |
1da177e4 LT |
2200 | } |
2201 | ||
2202 | module_init(rfcomm_init); | |
2203 | module_exit(rfcomm_exit); | |
2204 | ||
7c2660b0 MH |
2205 | module_param(disable_cfc, bool, 0644); |
2206 | MODULE_PARM_DESC(disable_cfc, "Disable credit based flow control"); | |
2207 | ||
98bcd08b MH |
2208 | module_param(channel_mtu, int, 0644); |
2209 | MODULE_PARM_DESC(channel_mtu, "Default MTU for the RFCOMM channel"); | |
2210 | ||
56f3a40a MH |
2211 | module_param(l2cap_mtu, uint, 0644); |
2212 | MODULE_PARM_DESC(l2cap_mtu, "Default MTU for the L2CAP connection"); | |
2213 | ||
eae38eed MH |
2214 | module_param(l2cap_ertm, bool, 0644); |
2215 | MODULE_PARM_DESC(l2cap_ertm, "Use L2CAP ERTM mode for connection"); | |
2216 | ||
63fbd24e | 2217 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
2218 | MODULE_DESCRIPTION("Bluetooth RFCOMM ver " VERSION); |
2219 | MODULE_VERSION(VERSION); | |
2220 | MODULE_LICENSE("GPL"); | |
2221 | MODULE_ALIAS("bt-proto-3"); |