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. | |
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> |
5a0e3ad6 | 41 | #include <linux/slab.h> |
4a3e2f71 | 42 | |
1da177e4 | 43 | #include <net/sock.h> |
285b4e90 | 44 | #include <linux/uaccess.h> |
1da177e4 LT |
45 | #include <asm/unaligned.h> |
46 | ||
47 | #include <net/bluetooth/bluetooth.h> | |
48 | #include <net/bluetooth/hci_core.h> | |
49 | #include <net/bluetooth/l2cap.h> | |
50 | #include <net/bluetooth/rfcomm.h> | |
51 | ||
5f9018af | 52 | #define VERSION "1.11" |
56f3a40a | 53 | |
eb939922 RR |
54 | static bool disable_cfc; |
55 | static bool l2cap_ertm; | |
98bcd08b | 56 | static int channel_mtu = -1; |
56f3a40a MH |
57 | static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU; |
58 | ||
1da177e4 LT |
59 | static struct task_struct *rfcomm_thread; |
60 | ||
4a3e2f71 AV |
61 | static DEFINE_MUTEX(rfcomm_mutex); |
62 | #define rfcomm_lock() mutex_lock(&rfcomm_mutex) | |
63 | #define rfcomm_unlock() mutex_unlock(&rfcomm_mutex) | |
1da177e4 | 64 | |
1da177e4 LT |
65 | |
66 | static LIST_HEAD(session_list); | |
1da177e4 | 67 | |
5436538f | 68 | static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len); |
1da177e4 LT |
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 | ||
63ce0900 LAD |
81 | static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, |
82 | bdaddr_t *dst, | |
83 | u8 sec_level, | |
84 | int *err); | |
1da177e4 LT |
85 | static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst); |
86 | static void rfcomm_session_del(struct rfcomm_session *s); | |
87 | ||
88 | /* ---- RFCOMM frame parsing macros ---- */ | |
89 | #define __get_dlci(b) ((b & 0xfc) >> 2) | |
90 | #define __get_channel(b) ((b & 0xf8) >> 3) | |
91 | #define __get_dir(b) ((b & 0x04) >> 2) | |
92 | #define __get_type(b) ((b & 0xef)) | |
93 | ||
94 | #define __test_ea(b) ((b & 0x01)) | |
95 | #define __test_cr(b) ((b & 0x02)) | |
96 | #define __test_pf(b) ((b & 0x10)) | |
97 | ||
98 | #define __addr(cr, dlci) (((dlci & 0x3f) << 2) | (cr << 1) | 0x01) | |
99 | #define __ctrl(type, pf) (((type & 0xef) | (pf << 4))) | |
100 | #define __dlci(dir, chn) (((chn & 0x1f) << 1) | dir) | |
101 | #define __srv_channel(dlci) (dlci >> 1) | |
102 | #define __dir(dlci) (dlci & 0x01) | |
103 | ||
104 | #define __len8(len) (((len) << 1) | 1) | |
105 | #define __len16(len) ((len) << 1) | |
106 | ||
107 | /* MCC macros */ | |
108 | #define __mcc_type(cr, type) (((type << 2) | (cr << 1) | 0x01)) | |
109 | #define __get_mcc_type(b) ((b & 0xfc) >> 2) | |
110 | #define __get_mcc_len(b) ((b & 0xfe) >> 1) | |
111 | ||
112 | /* RPN macros */ | |
3a5e903c | 113 | #define __rpn_line_settings(data, stop, parity) ((data & 0x3) | ((stop & 0x1) << 2) | ((parity & 0x7) << 3)) |
1da177e4 LT |
114 | #define __get_rpn_data_bits(line) ((line) & 0x3) |
115 | #define __get_rpn_stop_bits(line) (((line) >> 2) & 0x1) | |
3a5e903c | 116 | #define __get_rpn_parity(line) (((line) >> 3) & 0x7) |
1da177e4 | 117 | |
534c92fd | 118 | static inline void rfcomm_schedule(void) |
1da177e4 LT |
119 | { |
120 | if (!rfcomm_thread) | |
121 | return; | |
1da177e4 LT |
122 | wake_up_process(rfcomm_thread); |
123 | } | |
124 | ||
125 | static inline void rfcomm_session_put(struct rfcomm_session *s) | |
126 | { | |
127 | if (atomic_dec_and_test(&s->refcnt)) | |
128 | rfcomm_session_del(s); | |
129 | } | |
130 | ||
131 | /* ---- RFCOMM FCS computation ---- */ | |
132 | ||
408c1ce2 | 133 | /* reversed, 8-bit, poly=0x07 */ |
8e87d142 | 134 | static unsigned char rfcomm_crc_table[256] = { |
408c1ce2 MH |
135 | 0x00, 0x91, 0xe3, 0x72, 0x07, 0x96, 0xe4, 0x75, |
136 | 0x0e, 0x9f, 0xed, 0x7c, 0x09, 0x98, 0xea, 0x7b, | |
137 | 0x1c, 0x8d, 0xff, 0x6e, 0x1b, 0x8a, 0xf8, 0x69, | |
138 | 0x12, 0x83, 0xf1, 0x60, 0x15, 0x84, 0xf6, 0x67, | |
139 | ||
140 | 0x38, 0xa9, 0xdb, 0x4a, 0x3f, 0xae, 0xdc, 0x4d, | |
141 | 0x36, 0xa7, 0xd5, 0x44, 0x31, 0xa0, 0xd2, 0x43, | |
142 | 0x24, 0xb5, 0xc7, 0x56, 0x23, 0xb2, 0xc0, 0x51, | |
143 | 0x2a, 0xbb, 0xc9, 0x58, 0x2d, 0xbc, 0xce, 0x5f, | |
144 | ||
145 | 0x70, 0xe1, 0x93, 0x02, 0x77, 0xe6, 0x94, 0x05, | |
146 | 0x7e, 0xef, 0x9d, 0x0c, 0x79, 0xe8, 0x9a, 0x0b, | |
147 | 0x6c, 0xfd, 0x8f, 0x1e, 0x6b, 0xfa, 0x88, 0x19, | |
148 | 0x62, 0xf3, 0x81, 0x10, 0x65, 0xf4, 0x86, 0x17, | |
149 | ||
150 | 0x48, 0xd9, 0xab, 0x3a, 0x4f, 0xde, 0xac, 0x3d, | |
151 | 0x46, 0xd7, 0xa5, 0x34, 0x41, 0xd0, 0xa2, 0x33, | |
152 | 0x54, 0xc5, 0xb7, 0x26, 0x53, 0xc2, 0xb0, 0x21, | |
153 | 0x5a, 0xcb, 0xb9, 0x28, 0x5d, 0xcc, 0xbe, 0x2f, | |
154 | ||
155 | 0xe0, 0x71, 0x03, 0x92, 0xe7, 0x76, 0x04, 0x95, | |
156 | 0xee, 0x7f, 0x0d, 0x9c, 0xe9, 0x78, 0x0a, 0x9b, | |
157 | 0xfc, 0x6d, 0x1f, 0x8e, 0xfb, 0x6a, 0x18, 0x89, | |
158 | 0xf2, 0x63, 0x11, 0x80, 0xf5, 0x64, 0x16, 0x87, | |
159 | ||
160 | 0xd8, 0x49, 0x3b, 0xaa, 0xdf, 0x4e, 0x3c, 0xad, | |
161 | 0xd6, 0x47, 0x35, 0xa4, 0xd1, 0x40, 0x32, 0xa3, | |
162 | 0xc4, 0x55, 0x27, 0xb6, 0xc3, 0x52, 0x20, 0xb1, | |
163 | 0xca, 0x5b, 0x29, 0xb8, 0xcd, 0x5c, 0x2e, 0xbf, | |
164 | ||
165 | 0x90, 0x01, 0x73, 0xe2, 0x97, 0x06, 0x74, 0xe5, | |
166 | 0x9e, 0x0f, 0x7d, 0xec, 0x99, 0x08, 0x7a, 0xeb, | |
167 | 0x8c, 0x1d, 0x6f, 0xfe, 0x8b, 0x1a, 0x68, 0xf9, | |
168 | 0x82, 0x13, 0x61, 0xf0, 0x85, 0x14, 0x66, 0xf7, | |
169 | ||
170 | 0xa8, 0x39, 0x4b, 0xda, 0xaf, 0x3e, 0x4c, 0xdd, | |
171 | 0xa6, 0x37, 0x45, 0xd4, 0xa1, 0x30, 0x42, 0xd3, | |
172 | 0xb4, 0x25, 0x57, 0xc6, 0xb3, 0x22, 0x50, 0xc1, | |
173 | 0xba, 0x2b, 0x59, 0xc8, 0xbd, 0x2c, 0x5e, 0xcf | |
174 | }; | |
175 | ||
1da177e4 LT |
176 | /* CRC on 2 bytes */ |
177 | #define __crc(data) (rfcomm_crc_table[rfcomm_crc_table[0xff ^ data[0]] ^ data[1]]) | |
178 | ||
8e87d142 | 179 | /* FCS on 2 bytes */ |
1da177e4 LT |
180 | static inline u8 __fcs(u8 *data) |
181 | { | |
a02cec21 | 182 | return 0xff - __crc(data); |
1da177e4 LT |
183 | } |
184 | ||
8e87d142 | 185 | /* FCS on 3 bytes */ |
1da177e4 LT |
186 | static inline u8 __fcs2(u8 *data) |
187 | { | |
a02cec21 | 188 | return 0xff - rfcomm_crc_table[__crc(data) ^ data[2]]; |
1da177e4 LT |
189 | } |
190 | ||
191 | /* Check FCS */ | |
192 | static inline int __check_fcs(u8 *data, int type, u8 fcs) | |
193 | { | |
194 | u8 f = __crc(data); | |
195 | ||
196 | if (type != RFCOMM_UIH) | |
197 | f = rfcomm_crc_table[f ^ data[2]]; | |
198 | ||
199 | return rfcomm_crc_table[f ^ fcs] != 0xcf; | |
200 | } | |
201 | ||
202 | /* ---- L2CAP callbacks ---- */ | |
203 | static void rfcomm_l2state_change(struct sock *sk) | |
204 | { | |
205 | BT_DBG("%p state %d", sk, sk->sk_state); | |
534c92fd | 206 | rfcomm_schedule(); |
1da177e4 LT |
207 | } |
208 | ||
209 | static void rfcomm_l2data_ready(struct sock *sk, int bytes) | |
210 | { | |
211 | BT_DBG("%p bytes %d", sk, bytes); | |
534c92fd | 212 | rfcomm_schedule(); |
1da177e4 LT |
213 | } |
214 | ||
215 | static int rfcomm_l2sock_create(struct socket **sock) | |
216 | { | |
217 | int err; | |
218 | ||
219 | BT_DBG(""); | |
220 | ||
221 | err = sock_create_kern(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP, sock); | |
222 | if (!err) { | |
223 | struct sock *sk = (*sock)->sk; | |
224 | sk->sk_data_ready = rfcomm_l2data_ready; | |
225 | sk->sk_state_change = rfcomm_l2state_change; | |
226 | } | |
227 | return err; | |
228 | } | |
229 | ||
9f2c8a03 | 230 | static inline int rfcomm_check_security(struct rfcomm_dlc *d) |
77db1980 MH |
231 | { |
232 | struct sock *sk = d->session->sock->sk; | |
8c1d787b GP |
233 | struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; |
234 | ||
0684e5f9 MH |
235 | __u8 auth_type; |
236 | ||
237 | switch (d->sec_level) { | |
238 | case BT_SECURITY_HIGH: | |
239 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
240 | break; | |
241 | case BT_SECURITY_MEDIUM: | |
242 | auth_type = HCI_AT_GENERAL_BONDING; | |
243 | break; | |
244 | default: | |
245 | auth_type = HCI_AT_NO_BONDING; | |
246 | break; | |
247 | } | |
77db1980 | 248 | |
8c1d787b | 249 | return hci_conn_security(conn->hcon, d->sec_level, auth_type); |
77db1980 MH |
250 | } |
251 | ||
9e726b17 LAD |
252 | static void rfcomm_session_timeout(unsigned long arg) |
253 | { | |
254 | struct rfcomm_session *s = (void *) arg; | |
255 | ||
256 | BT_DBG("session %p state %ld", s, s->state); | |
257 | ||
258 | set_bit(RFCOMM_TIMED_OUT, &s->flags); | |
534c92fd | 259 | rfcomm_schedule(); |
9e726b17 LAD |
260 | } |
261 | ||
262 | static void rfcomm_session_set_timer(struct rfcomm_session *s, long timeout) | |
263 | { | |
264 | BT_DBG("session %p state %ld timeout %ld", s, s->state, timeout); | |
265 | ||
266 | if (!mod_timer(&s->timer, jiffies + timeout)) | |
267 | rfcomm_session_hold(s); | |
268 | } | |
269 | ||
270 | static void rfcomm_session_clear_timer(struct rfcomm_session *s) | |
271 | { | |
272 | BT_DBG("session %p state %ld", s, s->state); | |
273 | ||
274 | if (timer_pending(&s->timer) && del_timer(&s->timer)) | |
275 | rfcomm_session_put(s); | |
276 | } | |
277 | ||
1da177e4 LT |
278 | /* ---- RFCOMM DLCs ---- */ |
279 | static void rfcomm_dlc_timeout(unsigned long arg) | |
280 | { | |
281 | struct rfcomm_dlc *d = (void *) arg; | |
282 | ||
283 | BT_DBG("dlc %p state %ld", d, d->state); | |
284 | ||
285 | set_bit(RFCOMM_TIMED_OUT, &d->flags); | |
286 | rfcomm_dlc_put(d); | |
534c92fd | 287 | rfcomm_schedule(); |
1da177e4 LT |
288 | } |
289 | ||
290 | static void rfcomm_dlc_set_timer(struct rfcomm_dlc *d, long timeout) | |
291 | { | |
292 | BT_DBG("dlc %p state %ld timeout %ld", d, d->state, timeout); | |
293 | ||
294 | if (!mod_timer(&d->timer, jiffies + timeout)) | |
295 | rfcomm_dlc_hold(d); | |
296 | } | |
297 | ||
298 | static void rfcomm_dlc_clear_timer(struct rfcomm_dlc *d) | |
299 | { | |
300 | BT_DBG("dlc %p state %ld", d, d->state); | |
301 | ||
302 | if (timer_pending(&d->timer) && del_timer(&d->timer)) | |
303 | rfcomm_dlc_put(d); | |
304 | } | |
305 | ||
306 | static void rfcomm_dlc_clear_state(struct rfcomm_dlc *d) | |
307 | { | |
308 | BT_DBG("%p", d); | |
309 | ||
310 | d->state = BT_OPEN; | |
311 | d->flags = 0; | |
312 | d->mscex = 0; | |
183f732c | 313 | d->sec_level = BT_SECURITY_LOW; |
1da177e4 LT |
314 | d->mtu = RFCOMM_DEFAULT_MTU; |
315 | d->v24_sig = RFCOMM_V24_RTC | RFCOMM_V24_RTR | RFCOMM_V24_DV; | |
316 | ||
317 | d->cfc = RFCOMM_CFC_DISABLED; | |
318 | d->rx_credits = RFCOMM_DEFAULT_CREDITS; | |
319 | } | |
320 | ||
dd0fc66f | 321 | struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio) |
1da177e4 | 322 | { |
25ea6db0 MH |
323 | struct rfcomm_dlc *d = kzalloc(sizeof(*d), prio); |
324 | ||
1da177e4 LT |
325 | if (!d) |
326 | return NULL; | |
1da177e4 | 327 | |
b24b8a24 | 328 | setup_timer(&d->timer, rfcomm_dlc_timeout, (unsigned long)d); |
1da177e4 LT |
329 | |
330 | skb_queue_head_init(&d->tx_queue); | |
331 | spin_lock_init(&d->lock); | |
332 | atomic_set(&d->refcnt, 1); | |
333 | ||
334 | rfcomm_dlc_clear_state(d); | |
8e87d142 | 335 | |
1da177e4 | 336 | BT_DBG("%p", d); |
25ea6db0 | 337 | |
1da177e4 LT |
338 | return d; |
339 | } | |
340 | ||
341 | void rfcomm_dlc_free(struct rfcomm_dlc *d) | |
342 | { | |
343 | BT_DBG("%p", d); | |
344 | ||
345 | skb_queue_purge(&d->tx_queue); | |
346 | kfree(d); | |
347 | } | |
348 | ||
349 | static void rfcomm_dlc_link(struct rfcomm_session *s, struct rfcomm_dlc *d) | |
350 | { | |
351 | BT_DBG("dlc %p session %p", d, s); | |
352 | ||
353 | rfcomm_session_hold(s); | |
354 | ||
9e726b17 | 355 | rfcomm_session_clear_timer(s); |
1da177e4 LT |
356 | rfcomm_dlc_hold(d); |
357 | list_add(&d->list, &s->dlcs); | |
358 | d->session = s; | |
359 | } | |
360 | ||
361 | static void rfcomm_dlc_unlink(struct rfcomm_dlc *d) | |
362 | { | |
363 | struct rfcomm_session *s = d->session; | |
364 | ||
365 | BT_DBG("dlc %p refcnt %d session %p", d, atomic_read(&d->refcnt), s); | |
366 | ||
367 | list_del(&d->list); | |
368 | d->session = NULL; | |
369 | rfcomm_dlc_put(d); | |
370 | ||
9e726b17 LAD |
371 | if (list_empty(&s->dlcs)) |
372 | rfcomm_session_set_timer(s, RFCOMM_IDLE_TIMEOUT); | |
373 | ||
1da177e4 LT |
374 | rfcomm_session_put(s); |
375 | } | |
376 | ||
377 | static struct rfcomm_dlc *rfcomm_dlc_get(struct rfcomm_session *s, u8 dlci) | |
378 | { | |
379 | struct rfcomm_dlc *d; | |
1da177e4 | 380 | |
8035ded4 | 381 | list_for_each_entry(d, &s->dlcs, list) |
1da177e4 LT |
382 | if (d->dlci == dlci) |
383 | return d; | |
8035ded4 | 384 | |
1da177e4 LT |
385 | return NULL; |
386 | } | |
387 | ||
388 | static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) | |
389 | { | |
390 | struct rfcomm_session *s; | |
391 | int err = 0; | |
392 | u8 dlci; | |
393 | ||
8e87d142 | 394 | BT_DBG("dlc %p state %ld %s %s channel %d", |
1da177e4 LT |
395 | d, d->state, batostr(src), batostr(dst), channel); |
396 | ||
397 | if (channel < 1 || channel > 30) | |
398 | return -EINVAL; | |
399 | ||
400 | if (d->state != BT_OPEN && d->state != BT_CLOSED) | |
401 | return 0; | |
402 | ||
403 | s = rfcomm_session_get(src, dst); | |
404 | if (!s) { | |
63ce0900 | 405 | s = rfcomm_session_create(src, dst, d->sec_level, &err); |
1da177e4 LT |
406 | if (!s) |
407 | return err; | |
408 | } | |
409 | ||
410 | dlci = __dlci(!s->initiator, channel); | |
411 | ||
412 | /* Check if DLCI already exists */ | |
413 | if (rfcomm_dlc_get(s, dlci)) | |
414 | return -EBUSY; | |
415 | ||
416 | rfcomm_dlc_clear_state(d); | |
417 | ||
418 | d->dlci = dlci; | |
419 | d->addr = __addr(s->initiator, dlci); | |
420 | d->priority = 7; | |
421 | ||
77db1980 | 422 | d->state = BT_CONFIG; |
1da177e4 LT |
423 | rfcomm_dlc_link(s, d); |
424 | ||
77db1980 MH |
425 | d->out = 1; |
426 | ||
1da177e4 LT |
427 | d->mtu = s->mtu; |
428 | d->cfc = (s->cfc == RFCOMM_CFC_UNKNOWN) ? 0 : s->cfc; | |
429 | ||
77db1980 | 430 | if (s->state == BT_CONNECTED) { |
9f2c8a03 | 431 | if (rfcomm_check_security(d)) |
77db1980 | 432 | rfcomm_send_pn(s, 1, d); |
8c1b2355 MH |
433 | else |
434 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); | |
77db1980 MH |
435 | } |
436 | ||
1da177e4 | 437 | rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT); |
77db1980 | 438 | |
1da177e4 LT |
439 | return 0; |
440 | } | |
441 | ||
442 | int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) | |
443 | { | |
444 | int r; | |
445 | ||
446 | rfcomm_lock(); | |
447 | ||
448 | r = __rfcomm_dlc_open(d, src, dst, channel); | |
449 | ||
450 | rfcomm_unlock(); | |
451 | return r; | |
452 | } | |
453 | ||
454 | static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err) | |
455 | { | |
456 | struct rfcomm_session *s = d->session; | |
457 | if (!s) | |
458 | return 0; | |
459 | ||
460 | BT_DBG("dlc %p state %ld dlci %d err %d session %p", | |
461 | d, d->state, d->dlci, err, s); | |
462 | ||
463 | switch (d->state) { | |
1da177e4 | 464 | case BT_CONNECT: |
bb23c0ab MH |
465 | case BT_CONFIG: |
466 | if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { | |
467 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
534c92fd | 468 | rfcomm_schedule(); |
bb23c0ab MH |
469 | break; |
470 | } | |
471 | /* Fall through */ | |
472 | ||
473 | case BT_CONNECTED: | |
1da177e4 LT |
474 | d->state = BT_DISCONN; |
475 | if (skb_queue_empty(&d->tx_queue)) { | |
476 | rfcomm_send_disc(s, d->dlci); | |
477 | rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT); | |
478 | } else { | |
479 | rfcomm_queue_disc(d); | |
480 | rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT * 2); | |
481 | } | |
482 | break; | |
483 | ||
bb23c0ab | 484 | case BT_OPEN: |
8bf47941 | 485 | case BT_CONNECT2: |
bb23c0ab MH |
486 | if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { |
487 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
534c92fd | 488 | rfcomm_schedule(); |
bb23c0ab MH |
489 | break; |
490 | } | |
491 | /* Fall through */ | |
492 | ||
1da177e4 LT |
493 | default: |
494 | rfcomm_dlc_clear_timer(d); | |
495 | ||
496 | rfcomm_dlc_lock(d); | |
497 | d->state = BT_CLOSED; | |
1905f6c7 | 498 | d->state_change(d, err); |
4c8411f8 | 499 | rfcomm_dlc_unlock(d); |
1da177e4 LT |
500 | |
501 | skb_queue_purge(&d->tx_queue); | |
1da177e4 LT |
502 | rfcomm_dlc_unlink(d); |
503 | } | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | int rfcomm_dlc_close(struct rfcomm_dlc *d, int err) | |
509 | { | |
510 | int r; | |
511 | ||
512 | rfcomm_lock(); | |
513 | ||
514 | r = __rfcomm_dlc_close(d, err); | |
515 | ||
516 | rfcomm_unlock(); | |
517 | return r; | |
518 | } | |
519 | ||
520 | int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb) | |
521 | { | |
522 | int len = skb->len; | |
523 | ||
524 | if (d->state != BT_CONNECTED) | |
525 | return -ENOTCONN; | |
526 | ||
527 | BT_DBG("dlc %p mtu %d len %d", d, d->mtu, len); | |
528 | ||
529 | if (len > d->mtu) | |
530 | return -EINVAL; | |
531 | ||
532 | rfcomm_make_uih(skb, d->addr); | |
533 | skb_queue_tail(&d->tx_queue, skb); | |
534 | ||
535 | if (!test_bit(RFCOMM_TX_THROTTLED, &d->flags)) | |
534c92fd | 536 | rfcomm_schedule(); |
1da177e4 LT |
537 | return len; |
538 | } | |
539 | ||
b5606c2d | 540 | void __rfcomm_dlc_throttle(struct rfcomm_dlc *d) |
1da177e4 LT |
541 | { |
542 | BT_DBG("dlc %p state %ld", d, d->state); | |
543 | ||
544 | if (!d->cfc) { | |
545 | d->v24_sig |= RFCOMM_V24_FC; | |
546 | set_bit(RFCOMM_MSC_PENDING, &d->flags); | |
547 | } | |
534c92fd | 548 | rfcomm_schedule(); |
1da177e4 LT |
549 | } |
550 | ||
b5606c2d | 551 | void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d) |
1da177e4 LT |
552 | { |
553 | BT_DBG("dlc %p state %ld", d, d->state); | |
554 | ||
555 | if (!d->cfc) { | |
556 | d->v24_sig &= ~RFCOMM_V24_FC; | |
557 | set_bit(RFCOMM_MSC_PENDING, &d->flags); | |
558 | } | |
534c92fd | 559 | rfcomm_schedule(); |
1da177e4 LT |
560 | } |
561 | ||
8e87d142 | 562 | /* |
1da177e4 LT |
563 | Set/get modem status functions use _local_ status i.e. what we report |
564 | to the other side. | |
565 | Remote status is provided by dlc->modem_status() callback. | |
566 | */ | |
567 | int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig) | |
568 | { | |
8e87d142 | 569 | BT_DBG("dlc %p state %ld v24_sig 0x%x", |
1da177e4 LT |
570 | d, d->state, v24_sig); |
571 | ||
572 | if (test_bit(RFCOMM_RX_THROTTLED, &d->flags)) | |
573 | v24_sig |= RFCOMM_V24_FC; | |
574 | else | |
575 | v24_sig &= ~RFCOMM_V24_FC; | |
8e87d142 | 576 | |
1da177e4 LT |
577 | d->v24_sig = v24_sig; |
578 | ||
579 | if (!test_and_set_bit(RFCOMM_MSC_PENDING, &d->flags)) | |
534c92fd | 580 | rfcomm_schedule(); |
1da177e4 LT |
581 | |
582 | return 0; | |
583 | } | |
584 | ||
585 | int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig) | |
586 | { | |
8e87d142 | 587 | BT_DBG("dlc %p state %ld v24_sig 0x%x", |
1da177e4 LT |
588 | d, d->state, d->v24_sig); |
589 | ||
590 | *v24_sig = d->v24_sig; | |
591 | return 0; | |
592 | } | |
593 | ||
594 | /* ---- RFCOMM sessions ---- */ | |
595 | static struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state) | |
596 | { | |
25ea6db0 MH |
597 | struct rfcomm_session *s = kzalloc(sizeof(*s), GFP_KERNEL); |
598 | ||
1da177e4 LT |
599 | if (!s) |
600 | return NULL; | |
1da177e4 LT |
601 | |
602 | BT_DBG("session %p sock %p", s, sock); | |
603 | ||
9e726b17 LAD |
604 | setup_timer(&s->timer, rfcomm_session_timeout, (unsigned long) s); |
605 | ||
1da177e4 LT |
606 | INIT_LIST_HEAD(&s->dlcs); |
607 | s->state = state; | |
608 | s->sock = sock; | |
609 | ||
610 | s->mtu = RFCOMM_DEFAULT_MTU; | |
7c2660b0 | 611 | s->cfc = disable_cfc ? RFCOMM_CFC_DISABLED : RFCOMM_CFC_UNKNOWN; |
1da177e4 LT |
612 | |
613 | /* Do not increment module usage count for listening sessions. | |
614 | * Otherwise we won't be able to unload the module. */ | |
615 | if (state != BT_LISTEN) | |
616 | if (!try_module_get(THIS_MODULE)) { | |
617 | kfree(s); | |
618 | return NULL; | |
619 | } | |
620 | ||
621 | list_add(&s->list, &session_list); | |
622 | ||
623 | return s; | |
624 | } | |
625 | ||
626 | static void rfcomm_session_del(struct rfcomm_session *s) | |
627 | { | |
628 | int state = s->state; | |
629 | ||
630 | BT_DBG("session %p state %ld", s, s->state); | |
631 | ||
632 | list_del(&s->list); | |
633 | ||
634 | if (state == BT_CONNECTED) | |
635 | rfcomm_send_disc(s, 0); | |
636 | ||
9e726b17 | 637 | rfcomm_session_clear_timer(s); |
1da177e4 LT |
638 | sock_release(s->sock); |
639 | kfree(s); | |
640 | ||
641 | if (state != BT_LISTEN) | |
642 | module_put(THIS_MODULE); | |
643 | } | |
644 | ||
645 | static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst) | |
646 | { | |
647 | struct rfcomm_session *s; | |
648 | struct list_head *p, *n; | |
649 | struct bt_sock *sk; | |
650 | list_for_each_safe(p, n, &session_list) { | |
651 | s = list_entry(p, struct rfcomm_session, list); | |
8e87d142 | 652 | sk = bt_sk(s->sock->sk); |
1da177e4 LT |
653 | |
654 | if ((!bacmp(src, BDADDR_ANY) || !bacmp(&sk->src, src)) && | |
655 | !bacmp(&sk->dst, dst)) | |
656 | return s; | |
657 | } | |
658 | return NULL; | |
659 | } | |
660 | ||
661 | static void rfcomm_session_close(struct rfcomm_session *s, int err) | |
662 | { | |
663 | struct rfcomm_dlc *d; | |
664 | struct list_head *p, *n; | |
665 | ||
666 | BT_DBG("session %p state %ld err %d", s, s->state, err); | |
667 | ||
668 | rfcomm_session_hold(s); | |
669 | ||
670 | s->state = BT_CLOSED; | |
671 | ||
672 | /* Close all dlcs */ | |
673 | list_for_each_safe(p, n, &s->dlcs) { | |
674 | d = list_entry(p, struct rfcomm_dlc, list); | |
675 | d->state = BT_CLOSED; | |
676 | __rfcomm_dlc_close(d, err); | |
677 | } | |
678 | ||
9e726b17 | 679 | rfcomm_session_clear_timer(s); |
1da177e4 LT |
680 | rfcomm_session_put(s); |
681 | } | |
682 | ||
63ce0900 LAD |
683 | static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, |
684 | bdaddr_t *dst, | |
685 | u8 sec_level, | |
686 | int *err) | |
1da177e4 LT |
687 | { |
688 | struct rfcomm_session *s = NULL; | |
689 | struct sockaddr_l2 addr; | |
690 | struct socket *sock; | |
691 | struct sock *sk; | |
692 | ||
693 | BT_DBG("%s %s", batostr(src), batostr(dst)); | |
694 | ||
695 | *err = rfcomm_l2sock_create(&sock); | |
696 | if (*err < 0) | |
697 | return NULL; | |
698 | ||
699 | bacpy(&addr.l2_bdaddr, src); | |
700 | addr.l2_family = AF_BLUETOOTH; | |
701 | addr.l2_psm = 0; | |
37e62f55 | 702 | addr.l2_cid = 0; |
48db9ca4 | 703 | *err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); |
1da177e4 LT |
704 | if (*err < 0) |
705 | goto failed; | |
706 | ||
707 | /* Set L2CAP options */ | |
708 | sk = sock->sk; | |
709 | lock_sock(sk); | |
0c1bc5c6 | 710 | l2cap_pi(sk)->chan->imtu = l2cap_mtu; |
47d1ec61 | 711 | l2cap_pi(sk)->chan->sec_level = sec_level; |
eae38eed | 712 | if (l2cap_ertm) |
0c1bc5c6 | 713 | l2cap_pi(sk)->chan->mode = L2CAP_MODE_ERTM; |
1da177e4 LT |
714 | release_sock(sk); |
715 | ||
716 | s = rfcomm_session_add(sock, BT_BOUND); | |
717 | if (!s) { | |
718 | *err = -ENOMEM; | |
719 | goto failed; | |
720 | } | |
721 | ||
1da177e4 LT |
722 | s->initiator = 1; |
723 | ||
724 | bacpy(&addr.l2_bdaddr, dst); | |
725 | addr.l2_family = AF_BLUETOOTH; | |
b4324b5d | 726 | addr.l2_psm = cpu_to_le16(RFCOMM_PSM); |
37e62f55 | 727 | addr.l2_cid = 0; |
48db9ca4 | 728 | *err = kernel_connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK); |
b4c612a4 | 729 | if (*err == 0 || *err == -EINPROGRESS) |
1da177e4 LT |
730 | return s; |
731 | ||
732 | rfcomm_session_del(s); | |
733 | return NULL; | |
734 | ||
735 | failed: | |
736 | sock_release(sock); | |
737 | return NULL; | |
738 | } | |
739 | ||
740 | void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst) | |
741 | { | |
742 | struct sock *sk = s->sock->sk; | |
743 | if (src) | |
744 | bacpy(src, &bt_sk(sk)->src); | |
745 | if (dst) | |
746 | bacpy(dst, &bt_sk(sk)->dst); | |
747 | } | |
748 | ||
749 | /* ---- RFCOMM frame sending ---- */ | |
5436538f | 750 | static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len) |
1da177e4 | 751 | { |
1da177e4 LT |
752 | struct kvec iv = { data, len }; |
753 | struct msghdr msg; | |
754 | ||
5436538f | 755 | BT_DBG("session %p len %d", s, len); |
1da177e4 LT |
756 | |
757 | memset(&msg, 0, sizeof(msg)); | |
758 | ||
5436538f | 759 | return kernel_sendmsg(s->sock, &msg, &iv, 1, len); |
1da177e4 LT |
760 | } |
761 | ||
262038fc LAD |
762 | static int rfcomm_send_cmd(struct rfcomm_session *s, struct rfcomm_cmd *cmd) |
763 | { | |
764 | BT_DBG("%p cmd %u", s, cmd->ctrl); | |
765 | ||
5436538f | 766 | return rfcomm_send_frame(s, (void *) cmd, sizeof(*cmd)); |
262038fc LAD |
767 | } |
768 | ||
1da177e4 LT |
769 | static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci) |
770 | { | |
771 | struct rfcomm_cmd cmd; | |
772 | ||
773 | BT_DBG("%p dlci %d", s, dlci); | |
774 | ||
775 | cmd.addr = __addr(s->initiator, dlci); | |
776 | cmd.ctrl = __ctrl(RFCOMM_SABM, 1); | |
777 | cmd.len = __len8(0); | |
778 | cmd.fcs = __fcs2((u8 *) &cmd); | |
779 | ||
262038fc | 780 | return rfcomm_send_cmd(s, &cmd); |
1da177e4 LT |
781 | } |
782 | ||
783 | static int rfcomm_send_ua(struct rfcomm_session *s, u8 dlci) | |
784 | { | |
785 | struct rfcomm_cmd cmd; | |
786 | ||
787 | BT_DBG("%p dlci %d", s, dlci); | |
788 | ||
789 | cmd.addr = __addr(!s->initiator, dlci); | |
790 | cmd.ctrl = __ctrl(RFCOMM_UA, 1); | |
791 | cmd.len = __len8(0); | |
792 | cmd.fcs = __fcs2((u8 *) &cmd); | |
793 | ||
262038fc | 794 | return rfcomm_send_cmd(s, &cmd); |
1da177e4 LT |
795 | } |
796 | ||
797 | static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci) | |
798 | { | |
799 | struct rfcomm_cmd cmd; | |
800 | ||
801 | BT_DBG("%p dlci %d", s, dlci); | |
802 | ||
803 | cmd.addr = __addr(s->initiator, dlci); | |
804 | cmd.ctrl = __ctrl(RFCOMM_DISC, 1); | |
805 | cmd.len = __len8(0); | |
806 | cmd.fcs = __fcs2((u8 *) &cmd); | |
807 | ||
262038fc | 808 | return rfcomm_send_cmd(s, &cmd); |
1da177e4 LT |
809 | } |
810 | ||
811 | static int rfcomm_queue_disc(struct rfcomm_dlc *d) | |
812 | { | |
813 | struct rfcomm_cmd *cmd; | |
814 | struct sk_buff *skb; | |
815 | ||
816 | BT_DBG("dlc %p dlci %d", d, d->dlci); | |
817 | ||
818 | skb = alloc_skb(sizeof(*cmd), GFP_KERNEL); | |
819 | if (!skb) | |
820 | return -ENOMEM; | |
821 | ||
822 | cmd = (void *) __skb_put(skb, sizeof(*cmd)); | |
823 | cmd->addr = d->addr; | |
824 | cmd->ctrl = __ctrl(RFCOMM_DISC, 1); | |
825 | cmd->len = __len8(0); | |
826 | cmd->fcs = __fcs2((u8 *) cmd); | |
827 | ||
828 | skb_queue_tail(&d->tx_queue, skb); | |
534c92fd | 829 | rfcomm_schedule(); |
1da177e4 LT |
830 | return 0; |
831 | } | |
832 | ||
833 | static int rfcomm_send_dm(struct rfcomm_session *s, u8 dlci) | |
834 | { | |
835 | struct rfcomm_cmd cmd; | |
836 | ||
837 | BT_DBG("%p dlci %d", s, dlci); | |
838 | ||
839 | cmd.addr = __addr(!s->initiator, dlci); | |
840 | cmd.ctrl = __ctrl(RFCOMM_DM, 1); | |
841 | cmd.len = __len8(0); | |
842 | cmd.fcs = __fcs2((u8 *) &cmd); | |
843 | ||
262038fc | 844 | return rfcomm_send_cmd(s, &cmd); |
1da177e4 LT |
845 | } |
846 | ||
847 | static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type) | |
848 | { | |
849 | struct rfcomm_hdr *hdr; | |
850 | struct rfcomm_mcc *mcc; | |
851 | u8 buf[16], *ptr = buf; | |
852 | ||
853 | BT_DBG("%p cr %d type %d", s, cr, type); | |
854 | ||
855 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
856 | hdr->addr = __addr(s->initiator, 0); | |
857 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
858 | hdr->len = __len8(sizeof(*mcc) + 1); | |
859 | ||
860 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
861 | mcc->type = __mcc_type(cr, RFCOMM_NSC); | |
862 | mcc->len = __len8(1); | |
863 | ||
864 | /* Type that we didn't like */ | |
865 | *ptr = __mcc_type(cr, type); ptr++; | |
866 | ||
867 | *ptr = __fcs(buf); ptr++; | |
868 | ||
5436538f | 869 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
870 | } |
871 | ||
872 | static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d) | |
873 | { | |
874 | struct rfcomm_hdr *hdr; | |
875 | struct rfcomm_mcc *mcc; | |
876 | struct rfcomm_pn *pn; | |
877 | u8 buf[16], *ptr = buf; | |
878 | ||
879 | BT_DBG("%p cr %d dlci %d mtu %d", s, cr, d->dlci, d->mtu); | |
880 | ||
881 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
882 | hdr->addr = __addr(s->initiator, 0); | |
883 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
884 | hdr->len = __len8(sizeof(*mcc) + sizeof(*pn)); | |
885 | ||
886 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
887 | mcc->type = __mcc_type(cr, RFCOMM_PN); | |
888 | mcc->len = __len8(sizeof(*pn)); | |
889 | ||
890 | pn = (void *) ptr; ptr += sizeof(*pn); | |
891 | pn->dlci = d->dlci; | |
892 | pn->priority = d->priority; | |
893 | pn->ack_timer = 0; | |
894 | pn->max_retrans = 0; | |
895 | ||
896 | if (s->cfc) { | |
897 | pn->flow_ctrl = cr ? 0xf0 : 0xe0; | |
898 | pn->credits = RFCOMM_DEFAULT_CREDITS; | |
899 | } else { | |
900 | pn->flow_ctrl = 0; | |
901 | pn->credits = 0; | |
902 | } | |
903 | ||
98bcd08b | 904 | if (cr && channel_mtu >= 0) |
b4324b5d | 905 | pn->mtu = cpu_to_le16(channel_mtu); |
98bcd08b | 906 | else |
b4324b5d | 907 | pn->mtu = cpu_to_le16(d->mtu); |
1da177e4 LT |
908 | |
909 | *ptr = __fcs(buf); ptr++; | |
910 | ||
5436538f | 911 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
912 | } |
913 | ||
3a5e903c S |
914 | int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci, |
915 | u8 bit_rate, u8 data_bits, u8 stop_bits, | |
8e87d142 | 916 | u8 parity, u8 flow_ctrl_settings, |
3a5e903c | 917 | u8 xon_char, u8 xoff_char, u16 param_mask) |
1da177e4 LT |
918 | { |
919 | struct rfcomm_hdr *hdr; | |
920 | struct rfcomm_mcc *mcc; | |
921 | struct rfcomm_rpn *rpn; | |
922 | u8 buf[16], *ptr = buf; | |
923 | ||
924 | BT_DBG("%p cr %d dlci %d bit_r 0x%x data_b 0x%x stop_b 0x%x parity 0x%x" | |
8e87d142 YH |
925 | " flwc_s 0x%x xon_c 0x%x xoff_c 0x%x p_mask 0x%x", |
926 | s, cr, dlci, bit_rate, data_bits, stop_bits, parity, | |
3a5e903c | 927 | flow_ctrl_settings, xon_char, xoff_char, param_mask); |
1da177e4 LT |
928 | |
929 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
930 | hdr->addr = __addr(s->initiator, 0); | |
931 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
932 | hdr->len = __len8(sizeof(*mcc) + sizeof(*rpn)); | |
933 | ||
934 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
935 | mcc->type = __mcc_type(cr, RFCOMM_RPN); | |
936 | mcc->len = __len8(sizeof(*rpn)); | |
937 | ||
938 | rpn = (void *) ptr; ptr += sizeof(*rpn); | |
939 | rpn->dlci = __addr(1, dlci); | |
940 | rpn->bit_rate = bit_rate; | |
941 | rpn->line_settings = __rpn_line_settings(data_bits, stop_bits, parity); | |
942 | rpn->flow_ctrl = flow_ctrl_settings; | |
943 | rpn->xon_char = xon_char; | |
944 | rpn->xoff_char = xoff_char; | |
e8db8c99 | 945 | rpn->param_mask = cpu_to_le16(param_mask); |
1da177e4 LT |
946 | |
947 | *ptr = __fcs(buf); ptr++; | |
948 | ||
5436538f | 949 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
950 | } |
951 | ||
952 | static int rfcomm_send_rls(struct rfcomm_session *s, int cr, u8 dlci, u8 status) | |
953 | { | |
954 | struct rfcomm_hdr *hdr; | |
955 | struct rfcomm_mcc *mcc; | |
956 | struct rfcomm_rls *rls; | |
957 | u8 buf[16], *ptr = buf; | |
958 | ||
959 | BT_DBG("%p cr %d status 0x%x", s, cr, status); | |
960 | ||
961 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
962 | hdr->addr = __addr(s->initiator, 0); | |
963 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
964 | hdr->len = __len8(sizeof(*mcc) + sizeof(*rls)); | |
965 | ||
966 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
967 | mcc->type = __mcc_type(cr, RFCOMM_RLS); | |
968 | mcc->len = __len8(sizeof(*rls)); | |
969 | ||
970 | rls = (void *) ptr; ptr += sizeof(*rls); | |
971 | rls->dlci = __addr(1, dlci); | |
972 | rls->status = status; | |
973 | ||
974 | *ptr = __fcs(buf); ptr++; | |
975 | ||
5436538f | 976 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
977 | } |
978 | ||
979 | static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig) | |
980 | { | |
981 | struct rfcomm_hdr *hdr; | |
982 | struct rfcomm_mcc *mcc; | |
983 | struct rfcomm_msc *msc; | |
984 | u8 buf[16], *ptr = buf; | |
985 | ||
986 | BT_DBG("%p cr %d v24 0x%x", s, cr, v24_sig); | |
987 | ||
988 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
989 | hdr->addr = __addr(s->initiator, 0); | |
990 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
991 | hdr->len = __len8(sizeof(*mcc) + sizeof(*msc)); | |
992 | ||
993 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
994 | mcc->type = __mcc_type(cr, RFCOMM_MSC); | |
995 | mcc->len = __len8(sizeof(*msc)); | |
996 | ||
997 | msc = (void *) ptr; ptr += sizeof(*msc); | |
998 | msc->dlci = __addr(1, dlci); | |
999 | msc->v24_sig = v24_sig | 0x01; | |
1000 | ||
1001 | *ptr = __fcs(buf); ptr++; | |
1002 | ||
5436538f | 1003 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
1004 | } |
1005 | ||
1006 | static int rfcomm_send_fcoff(struct rfcomm_session *s, int cr) | |
1007 | { | |
1008 | struct rfcomm_hdr *hdr; | |
1009 | struct rfcomm_mcc *mcc; | |
1010 | u8 buf[16], *ptr = buf; | |
1011 | ||
1012 | BT_DBG("%p cr %d", s, cr); | |
1013 | ||
1014 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1015 | hdr->addr = __addr(s->initiator, 0); | |
1016 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1017 | hdr->len = __len8(sizeof(*mcc)); | |
1018 | ||
1019 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
1020 | mcc->type = __mcc_type(cr, RFCOMM_FCOFF); | |
1021 | mcc->len = __len8(0); | |
1022 | ||
1023 | *ptr = __fcs(buf); ptr++; | |
1024 | ||
5436538f | 1025 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
1026 | } |
1027 | ||
1028 | static int rfcomm_send_fcon(struct rfcomm_session *s, int cr) | |
1029 | { | |
1030 | struct rfcomm_hdr *hdr; | |
1031 | struct rfcomm_mcc *mcc; | |
1032 | u8 buf[16], *ptr = buf; | |
1033 | ||
1034 | BT_DBG("%p cr %d", s, cr); | |
1035 | ||
1036 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1037 | hdr->addr = __addr(s->initiator, 0); | |
1038 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1039 | hdr->len = __len8(sizeof(*mcc)); | |
1040 | ||
1041 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
1042 | mcc->type = __mcc_type(cr, RFCOMM_FCON); | |
1043 | mcc->len = __len8(0); | |
1044 | ||
1045 | *ptr = __fcs(buf); ptr++; | |
1046 | ||
5436538f | 1047 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
1048 | } |
1049 | ||
1050 | static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len) | |
1051 | { | |
1052 | struct socket *sock = s->sock; | |
1053 | struct kvec iv[3]; | |
1054 | struct msghdr msg; | |
1055 | unsigned char hdr[5], crc[1]; | |
1056 | ||
1057 | if (len > 125) | |
1058 | return -EINVAL; | |
1059 | ||
1060 | BT_DBG("%p cr %d", s, cr); | |
1061 | ||
1062 | hdr[0] = __addr(s->initiator, 0); | |
1063 | hdr[1] = __ctrl(RFCOMM_UIH, 0); | |
1064 | hdr[2] = 0x01 | ((len + 2) << 1); | |
1065 | hdr[3] = 0x01 | ((cr & 0x01) << 1) | (RFCOMM_TEST << 2); | |
1066 | hdr[4] = 0x01 | (len << 1); | |
1067 | ||
1068 | crc[0] = __fcs(hdr); | |
1069 | ||
1070 | iv[0].iov_base = hdr; | |
1071 | iv[0].iov_len = 5; | |
1072 | iv[1].iov_base = pattern; | |
1073 | iv[1].iov_len = len; | |
1074 | iv[2].iov_base = crc; | |
1075 | iv[2].iov_len = 1; | |
1076 | ||
1077 | memset(&msg, 0, sizeof(msg)); | |
1078 | ||
1079 | return kernel_sendmsg(sock, &msg, iv, 3, 6 + len); | |
1080 | } | |
1081 | ||
1082 | static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits) | |
1083 | { | |
1084 | struct rfcomm_hdr *hdr; | |
1085 | u8 buf[16], *ptr = buf; | |
1086 | ||
1087 | BT_DBG("%p addr %d credits %d", s, addr, credits); | |
1088 | ||
1089 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1090 | hdr->addr = addr; | |
1091 | hdr->ctrl = __ctrl(RFCOMM_UIH, 1); | |
1092 | hdr->len = __len8(0); | |
1093 | ||
1094 | *ptr = credits; ptr++; | |
1095 | ||
1096 | *ptr = __fcs(buf); ptr++; | |
1097 | ||
5436538f | 1098 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
1099 | } |
1100 | ||
1101 | static void rfcomm_make_uih(struct sk_buff *skb, u8 addr) | |
1102 | { | |
1103 | struct rfcomm_hdr *hdr; | |
1104 | int len = skb->len; | |
1105 | u8 *crc; | |
1106 | ||
1107 | if (len > 127) { | |
1108 | hdr = (void *) skb_push(skb, 4); | |
b4324b5d | 1109 | put_unaligned(cpu_to_le16(__len16(len)), (__le16 *) &hdr->len); |
1da177e4 LT |
1110 | } else { |
1111 | hdr = (void *) skb_push(skb, 3); | |
1112 | hdr->len = __len8(len); | |
1113 | } | |
1114 | hdr->addr = addr; | |
1115 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1116 | ||
1117 | crc = skb_put(skb, 1); | |
1118 | *crc = __fcs((void *) hdr); | |
1119 | } | |
1120 | ||
1121 | /* ---- RFCOMM frame reception ---- */ | |
1122 | static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci) | |
1123 | { | |
1124 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1125 | ||
1126 | if (dlci) { | |
1127 | /* Data channel */ | |
1128 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1129 | if (!d) { | |
1130 | rfcomm_send_dm(s, dlci); | |
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | switch (d->state) { | |
1135 | case BT_CONNECT: | |
1136 | rfcomm_dlc_clear_timer(d); | |
1137 | ||
1138 | rfcomm_dlc_lock(d); | |
1139 | d->state = BT_CONNECTED; | |
1140 | d->state_change(d, 0); | |
1141 | rfcomm_dlc_unlock(d); | |
1142 | ||
1143 | rfcomm_send_msc(s, 1, dlci, d->v24_sig); | |
1144 | break; | |
1145 | ||
1146 | case BT_DISCONN: | |
1147 | d->state = BT_CLOSED; | |
1148 | __rfcomm_dlc_close(d, 0); | |
9cf5b0ea MH |
1149 | |
1150 | if (list_empty(&s->dlcs)) { | |
1151 | s->state = BT_DISCONN; | |
1152 | rfcomm_send_disc(s, 0); | |
79e65478 | 1153 | rfcomm_session_clear_timer(s); |
9cf5b0ea MH |
1154 | } |
1155 | ||
1da177e4 LT |
1156 | break; |
1157 | } | |
1158 | } else { | |
1159 | /* Control channel */ | |
1160 | switch (s->state) { | |
1161 | case BT_CONNECT: | |
1162 | s->state = BT_CONNECTED; | |
1163 | rfcomm_process_connect(s); | |
1164 | break; | |
9cf5b0ea MH |
1165 | |
1166 | case BT_DISCONN: | |
cf33e77b OP |
1167 | /* rfcomm_session_put is called later so don't do |
1168 | * anything here otherwise we will mess up the session | |
1169 | * reference counter: | |
1170 | * | |
1171 | * (a) when we are the initiator dlc_unlink will drive | |
1172 | * the reference counter to 0 (there is no initial put | |
1173 | * after session_add) | |
1174 | * | |
1175 | * (b) when we are not the initiator rfcomm_rx_process | |
1176 | * will explicitly call put to balance the initial hold | |
1177 | * done after session add. | |
1178 | */ | |
9cf5b0ea | 1179 | break; |
1da177e4 LT |
1180 | } |
1181 | } | |
1182 | return 0; | |
1183 | } | |
1184 | ||
1185 | static int rfcomm_recv_dm(struct rfcomm_session *s, u8 dlci) | |
1186 | { | |
1187 | int err = 0; | |
1188 | ||
1189 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1190 | ||
1191 | if (dlci) { | |
1192 | /* Data DLC */ | |
1193 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1194 | if (d) { | |
1195 | if (d->state == BT_CONNECT || d->state == BT_CONFIG) | |
1196 | err = ECONNREFUSED; | |
1197 | else | |
1198 | err = ECONNRESET; | |
1199 | ||
1200 | d->state = BT_CLOSED; | |
1201 | __rfcomm_dlc_close(d, err); | |
1202 | } | |
1203 | } else { | |
1204 | if (s->state == BT_CONNECT) | |
1205 | err = ECONNREFUSED; | |
1206 | else | |
1207 | err = ECONNRESET; | |
1208 | ||
1209 | s->state = BT_CLOSED; | |
1210 | rfcomm_session_close(s, err); | |
1211 | } | |
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | static int rfcomm_recv_disc(struct rfcomm_session *s, u8 dlci) | |
1216 | { | |
1217 | int err = 0; | |
1218 | ||
1219 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1220 | ||
1221 | if (dlci) { | |
1222 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1223 | if (d) { | |
1224 | rfcomm_send_ua(s, dlci); | |
1225 | ||
1226 | if (d->state == BT_CONNECT || d->state == BT_CONFIG) | |
1227 | err = ECONNREFUSED; | |
1228 | else | |
1229 | err = ECONNRESET; | |
1230 | ||
1231 | d->state = BT_CLOSED; | |
1232 | __rfcomm_dlc_close(d, err); | |
8e87d142 | 1233 | } else |
1da177e4 | 1234 | rfcomm_send_dm(s, dlci); |
8e87d142 | 1235 | |
1da177e4 LT |
1236 | } else { |
1237 | rfcomm_send_ua(s, 0); | |
1238 | ||
1239 | if (s->state == BT_CONNECT) | |
1240 | err = ECONNREFUSED; | |
1241 | else | |
1242 | err = ECONNRESET; | |
1243 | ||
1244 | s->state = BT_CLOSED; | |
1245 | rfcomm_session_close(s, err); | |
1246 | } | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
bb23c0ab | 1251 | void rfcomm_dlc_accept(struct rfcomm_dlc *d) |
1da177e4 | 1252 | { |
300b9397 | 1253 | struct sock *sk = d->session->sock->sk; |
8c1d787b | 1254 | struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; |
300b9397 | 1255 | |
1da177e4 LT |
1256 | BT_DBG("dlc %p", d); |
1257 | ||
1258 | rfcomm_send_ua(d->session, d->dlci); | |
1259 | ||
e2139b32 JH |
1260 | rfcomm_dlc_clear_timer(d); |
1261 | ||
1da177e4 LT |
1262 | rfcomm_dlc_lock(d); |
1263 | d->state = BT_CONNECTED; | |
1264 | d->state_change(d, 0); | |
1265 | rfcomm_dlc_unlock(d); | |
1266 | ||
9f2c8a03 | 1267 | if (d->role_switch) |
8c1d787b | 1268 | hci_conn_switch_role(conn->hcon, 0x00); |
300b9397 | 1269 | |
1da177e4 LT |
1270 | rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); |
1271 | } | |
1272 | ||
bb23c0ab MH |
1273 | static void rfcomm_check_accept(struct rfcomm_dlc *d) |
1274 | { | |
9f2c8a03 | 1275 | if (rfcomm_check_security(d)) { |
bb23c0ab MH |
1276 | if (d->defer_setup) { |
1277 | set_bit(RFCOMM_DEFER_SETUP, &d->flags); | |
1278 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8bf47941 MH |
1279 | |
1280 | rfcomm_dlc_lock(d); | |
1281 | d->state = BT_CONNECT2; | |
1282 | d->state_change(d, 0); | |
1283 | rfcomm_dlc_unlock(d); | |
bb23c0ab MH |
1284 | } else |
1285 | rfcomm_dlc_accept(d); | |
8c1b2355 MH |
1286 | } else { |
1287 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); | |
1288 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
bb23c0ab MH |
1289 | } |
1290 | } | |
1291 | ||
1da177e4 LT |
1292 | static int rfcomm_recv_sabm(struct rfcomm_session *s, u8 dlci) |
1293 | { | |
1294 | struct rfcomm_dlc *d; | |
1295 | u8 channel; | |
1296 | ||
1297 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1298 | ||
1299 | if (!dlci) { | |
1300 | rfcomm_send_ua(s, 0); | |
1301 | ||
1302 | if (s->state == BT_OPEN) { | |
1303 | s->state = BT_CONNECTED; | |
1304 | rfcomm_process_connect(s); | |
1305 | } | |
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | /* Check if DLC exists */ | |
1310 | d = rfcomm_dlc_get(s, dlci); | |
1311 | if (d) { | |
1312 | if (d->state == BT_OPEN) { | |
1313 | /* DLC was previously opened by PN request */ | |
bb23c0ab | 1314 | rfcomm_check_accept(d); |
1da177e4 LT |
1315 | } |
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | /* Notify socket layer about incoming connection */ | |
1320 | channel = __srv_channel(dlci); | |
1321 | if (rfcomm_connect_ind(s, channel, &d)) { | |
1322 | d->dlci = dlci; | |
1323 | d->addr = __addr(s->initiator, dlci); | |
1324 | rfcomm_dlc_link(s, d); | |
1325 | ||
bb23c0ab | 1326 | rfcomm_check_accept(d); |
1da177e4 LT |
1327 | } else { |
1328 | rfcomm_send_dm(s, dlci); | |
1329 | } | |
1330 | ||
1331 | return 0; | |
1332 | } | |
1333 | ||
1334 | static int rfcomm_apply_pn(struct rfcomm_dlc *d, int cr, struct rfcomm_pn *pn) | |
1335 | { | |
1336 | struct rfcomm_session *s = d->session; | |
1337 | ||
8e87d142 | 1338 | BT_DBG("dlc %p state %ld dlci %d mtu %d fc 0x%x credits %d", |
1da177e4 LT |
1339 | d, d->state, d->dlci, pn->mtu, pn->flow_ctrl, pn->credits); |
1340 | ||
7c2660b0 MH |
1341 | if ((pn->flow_ctrl == 0xf0 && s->cfc != RFCOMM_CFC_DISABLED) || |
1342 | pn->flow_ctrl == 0xe0) { | |
1343 | d->cfc = RFCOMM_CFC_ENABLED; | |
1da177e4 LT |
1344 | d->tx_credits = pn->credits; |
1345 | } else { | |
7c2660b0 | 1346 | d->cfc = RFCOMM_CFC_DISABLED; |
1da177e4 LT |
1347 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); |
1348 | } | |
1349 | ||
7c2660b0 MH |
1350 | if (s->cfc == RFCOMM_CFC_UNKNOWN) |
1351 | s->cfc = d->cfc; | |
1352 | ||
1da177e4 LT |
1353 | d->priority = pn->priority; |
1354 | ||
b4324b5d | 1355 | d->mtu = __le16_to_cpu(pn->mtu); |
98bcd08b MH |
1356 | |
1357 | if (cr && d->mtu > s->mtu) | |
1358 | d->mtu = s->mtu; | |
1da177e4 LT |
1359 | |
1360 | return 0; | |
1361 | } | |
1362 | ||
1363 | static int rfcomm_recv_pn(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1364 | { | |
1365 | struct rfcomm_pn *pn = (void *) skb->data; | |
1366 | struct rfcomm_dlc *d; | |
1367 | u8 dlci = pn->dlci; | |
1368 | ||
1369 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1370 | ||
1371 | if (!dlci) | |
1372 | return 0; | |
1373 | ||
1374 | d = rfcomm_dlc_get(s, dlci); | |
1375 | if (d) { | |
1376 | if (cr) { | |
1377 | /* PN request */ | |
1378 | rfcomm_apply_pn(d, cr, pn); | |
1379 | rfcomm_send_pn(s, 0, d); | |
1380 | } else { | |
1381 | /* PN response */ | |
1382 | switch (d->state) { | |
1383 | case BT_CONFIG: | |
1384 | rfcomm_apply_pn(d, cr, pn); | |
1385 | ||
1386 | d->state = BT_CONNECT; | |
1387 | rfcomm_send_sabm(s, d->dlci); | |
1388 | break; | |
1389 | } | |
1390 | } | |
1391 | } else { | |
1392 | u8 channel = __srv_channel(dlci); | |
1393 | ||
1394 | if (!cr) | |
1395 | return 0; | |
1396 | ||
1397 | /* PN request for non existing DLC. | |
1398 | * Assume incoming connection. */ | |
1399 | if (rfcomm_connect_ind(s, channel, &d)) { | |
1400 | d->dlci = dlci; | |
1401 | d->addr = __addr(s->initiator, dlci); | |
1402 | rfcomm_dlc_link(s, d); | |
1403 | ||
1404 | rfcomm_apply_pn(d, cr, pn); | |
1405 | ||
1406 | d->state = BT_OPEN; | |
1407 | rfcomm_send_pn(s, 0, d); | |
1408 | } else { | |
1409 | rfcomm_send_dm(s, dlci); | |
1410 | } | |
1411 | } | |
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_buff *skb) | |
1416 | { | |
1417 | struct rfcomm_rpn *rpn = (void *) skb->data; | |
1418 | u8 dlci = __get_dlci(rpn->dlci); | |
1419 | ||
1420 | u8 bit_rate = 0; | |
1421 | u8 data_bits = 0; | |
1422 | u8 stop_bits = 0; | |
1423 | u8 parity = 0; | |
1424 | u8 flow_ctrl = 0; | |
1425 | u8 xon_char = 0; | |
1426 | u8 xoff_char = 0; | |
1427 | u16 rpn_mask = RFCOMM_RPN_PM_ALL; | |
3a5e903c S |
1428 | |
1429 | 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", | |
1430 | dlci, cr, len, rpn->bit_rate, rpn->line_settings, rpn->flow_ctrl, | |
1431 | rpn->xon_char, rpn->xoff_char, rpn->param_mask); | |
1432 | ||
1433 | if (!cr) | |
1da177e4 | 1434 | return 0; |
3a5e903c | 1435 | |
1da177e4 | 1436 | if (len == 1) { |
08601469 YK |
1437 | /* This is a request, return default (according to ETSI TS 07.10) settings */ |
1438 | bit_rate = RFCOMM_RPN_BR_9600; | |
1da177e4 LT |
1439 | data_bits = RFCOMM_RPN_DATA_8; |
1440 | stop_bits = RFCOMM_RPN_STOP_1; | |
1441 | parity = RFCOMM_RPN_PARITY_NONE; | |
1442 | flow_ctrl = RFCOMM_RPN_FLOW_NONE; | |
1443 | xon_char = RFCOMM_RPN_XON_CHAR; | |
1444 | xoff_char = RFCOMM_RPN_XOFF_CHAR; | |
1da177e4 LT |
1445 | goto rpn_out; |
1446 | } | |
3a5e903c S |
1447 | |
1448 | /* Check for sane values, ignore/accept bit_rate, 8 bits, 1 stop bit, | |
1449 | * no parity, no flow control lines, normal XON/XOFF chars */ | |
1450 | ||
e8db8c99 | 1451 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_BITRATE)) { |
1da177e4 | 1452 | bit_rate = rpn->bit_rate; |
08601469 | 1453 | if (bit_rate > RFCOMM_RPN_BR_230400) { |
1da177e4 | 1454 | BT_DBG("RPN bit rate mismatch 0x%x", bit_rate); |
08601469 | 1455 | bit_rate = RFCOMM_RPN_BR_9600; |
1da177e4 LT |
1456 | rpn_mask ^= RFCOMM_RPN_PM_BITRATE; |
1457 | } | |
1458 | } | |
3a5e903c | 1459 | |
e8db8c99 | 1460 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_DATA)) { |
1da177e4 LT |
1461 | data_bits = __get_rpn_data_bits(rpn->line_settings); |
1462 | if (data_bits != RFCOMM_RPN_DATA_8) { | |
1463 | BT_DBG("RPN data bits mismatch 0x%x", data_bits); | |
1464 | data_bits = RFCOMM_RPN_DATA_8; | |
1465 | rpn_mask ^= RFCOMM_RPN_PM_DATA; | |
1466 | } | |
1467 | } | |
3a5e903c | 1468 | |
e8db8c99 | 1469 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_STOP)) { |
1da177e4 LT |
1470 | stop_bits = __get_rpn_stop_bits(rpn->line_settings); |
1471 | if (stop_bits != RFCOMM_RPN_STOP_1) { | |
1472 | BT_DBG("RPN stop bits mismatch 0x%x", stop_bits); | |
1473 | stop_bits = RFCOMM_RPN_STOP_1; | |
1474 | rpn_mask ^= RFCOMM_RPN_PM_STOP; | |
1475 | } | |
1476 | } | |
3a5e903c | 1477 | |
e8db8c99 | 1478 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_PARITY)) { |
1da177e4 LT |
1479 | parity = __get_rpn_parity(rpn->line_settings); |
1480 | if (parity != RFCOMM_RPN_PARITY_NONE) { | |
1481 | BT_DBG("RPN parity mismatch 0x%x", parity); | |
1482 | parity = RFCOMM_RPN_PARITY_NONE; | |
1483 | rpn_mask ^= RFCOMM_RPN_PM_PARITY; | |
1484 | } | |
1485 | } | |
3a5e903c | 1486 | |
e8db8c99 | 1487 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_FLOW)) { |
1da177e4 LT |
1488 | flow_ctrl = rpn->flow_ctrl; |
1489 | if (flow_ctrl != RFCOMM_RPN_FLOW_NONE) { | |
1490 | BT_DBG("RPN flow ctrl mismatch 0x%x", flow_ctrl); | |
1491 | flow_ctrl = RFCOMM_RPN_FLOW_NONE; | |
1492 | rpn_mask ^= RFCOMM_RPN_PM_FLOW; | |
1493 | } | |
1494 | } | |
3a5e903c | 1495 | |
e8db8c99 | 1496 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XON)) { |
1da177e4 LT |
1497 | xon_char = rpn->xon_char; |
1498 | if (xon_char != RFCOMM_RPN_XON_CHAR) { | |
1499 | BT_DBG("RPN XON char mismatch 0x%x", xon_char); | |
1500 | xon_char = RFCOMM_RPN_XON_CHAR; | |
1501 | rpn_mask ^= RFCOMM_RPN_PM_XON; | |
1502 | } | |
1503 | } | |
3a5e903c | 1504 | |
e8db8c99 | 1505 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XOFF)) { |
1da177e4 LT |
1506 | xoff_char = rpn->xoff_char; |
1507 | if (xoff_char != RFCOMM_RPN_XOFF_CHAR) { | |
1508 | BT_DBG("RPN XOFF char mismatch 0x%x", xoff_char); | |
1509 | xoff_char = RFCOMM_RPN_XOFF_CHAR; | |
1510 | rpn_mask ^= RFCOMM_RPN_PM_XOFF; | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | rpn_out: | |
3a5e903c S |
1515 | rfcomm_send_rpn(s, 0, dlci, bit_rate, data_bits, stop_bits, |
1516 | parity, flow_ctrl, xon_char, xoff_char, rpn_mask); | |
1da177e4 LT |
1517 | |
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | static int rfcomm_recv_rls(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1522 | { | |
1523 | struct rfcomm_rls *rls = (void *) skb->data; | |
1524 | u8 dlci = __get_dlci(rls->dlci); | |
1525 | ||
1526 | BT_DBG("dlci %d cr %d status 0x%x", dlci, cr, rls->status); | |
3a5e903c | 1527 | |
1da177e4 LT |
1528 | if (!cr) |
1529 | return 0; | |
1530 | ||
3a5e903c S |
1531 | /* We should probably do something with this information here. But |
1532 | * for now it's sufficient just to reply -- Bluetooth 1.1 says it's | |
1533 | * mandatory to recognise and respond to RLS */ | |
1da177e4 LT |
1534 | |
1535 | rfcomm_send_rls(s, 0, dlci, rls->status); | |
1536 | ||
1537 | return 0; | |
1538 | } | |
1539 | ||
1540 | static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1541 | { | |
1542 | struct rfcomm_msc *msc = (void *) skb->data; | |
1543 | struct rfcomm_dlc *d; | |
1544 | u8 dlci = __get_dlci(msc->dlci); | |
1545 | ||
1546 | BT_DBG("dlci %d cr %d v24 0x%x", dlci, cr, msc->v24_sig); | |
1547 | ||
1548 | d = rfcomm_dlc_get(s, dlci); | |
3a5e903c | 1549 | if (!d) |
1da177e4 LT |
1550 | return 0; |
1551 | ||
1552 | if (cr) { | |
1553 | if (msc->v24_sig & RFCOMM_V24_FC && !d->cfc) | |
1554 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1555 | else | |
1556 | clear_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
3a5e903c | 1557 | |
1da177e4 | 1558 | rfcomm_dlc_lock(d); |
8b6b3da7 MH |
1559 | |
1560 | d->remote_v24_sig = msc->v24_sig; | |
1561 | ||
1da177e4 LT |
1562 | if (d->modem_status) |
1563 | d->modem_status(d, msc->v24_sig); | |
8b6b3da7 | 1564 | |
1da177e4 | 1565 | rfcomm_dlc_unlock(d); |
8e87d142 | 1566 | |
1da177e4 LT |
1567 | rfcomm_send_msc(s, 0, dlci, msc->v24_sig); |
1568 | ||
1569 | d->mscex |= RFCOMM_MSCEX_RX; | |
3a5e903c | 1570 | } else |
1da177e4 LT |
1571 | d->mscex |= RFCOMM_MSCEX_TX; |
1572 | ||
1573 | return 0; | |
1574 | } | |
1575 | ||
1576 | static int rfcomm_recv_mcc(struct rfcomm_session *s, struct sk_buff *skb) | |
1577 | { | |
1578 | struct rfcomm_mcc *mcc = (void *) skb->data; | |
1579 | u8 type, cr, len; | |
1580 | ||
1581 | cr = __test_cr(mcc->type); | |
1582 | type = __get_mcc_type(mcc->type); | |
1583 | len = __get_mcc_len(mcc->len); | |
1584 | ||
1585 | BT_DBG("%p type 0x%x cr %d", s, type, cr); | |
1586 | ||
1587 | skb_pull(skb, 2); | |
1588 | ||
1589 | switch (type) { | |
1590 | case RFCOMM_PN: | |
1591 | rfcomm_recv_pn(s, cr, skb); | |
1592 | break; | |
1593 | ||
1594 | case RFCOMM_RPN: | |
1595 | rfcomm_recv_rpn(s, cr, len, skb); | |
1596 | break; | |
1597 | ||
1598 | case RFCOMM_RLS: | |
1599 | rfcomm_recv_rls(s, cr, skb); | |
1600 | break; | |
1601 | ||
1602 | case RFCOMM_MSC: | |
1603 | rfcomm_recv_msc(s, cr, skb); | |
1604 | break; | |
1605 | ||
1606 | case RFCOMM_FCOFF: | |
1607 | if (cr) { | |
1608 | set_bit(RFCOMM_TX_THROTTLED, &s->flags); | |
1609 | rfcomm_send_fcoff(s, 0); | |
1610 | } | |
1611 | break; | |
1612 | ||
1613 | case RFCOMM_FCON: | |
1614 | if (cr) { | |
1615 | clear_bit(RFCOMM_TX_THROTTLED, &s->flags); | |
1616 | rfcomm_send_fcon(s, 0); | |
1617 | } | |
1618 | break; | |
1619 | ||
1620 | case RFCOMM_TEST: | |
1621 | if (cr) | |
1622 | rfcomm_send_test(s, 0, skb->data, skb->len); | |
1623 | break; | |
1624 | ||
1625 | case RFCOMM_NSC: | |
1626 | break; | |
1627 | ||
1628 | default: | |
1629 | BT_ERR("Unknown control type 0x%02x", type); | |
1630 | rfcomm_send_nsc(s, cr, type); | |
1631 | break; | |
1632 | } | |
1633 | return 0; | |
1634 | } | |
1635 | ||
1636 | static int rfcomm_recv_data(struct rfcomm_session *s, u8 dlci, int pf, struct sk_buff *skb) | |
1637 | { | |
1638 | struct rfcomm_dlc *d; | |
1639 | ||
1640 | BT_DBG("session %p state %ld dlci %d pf %d", s, s->state, dlci, pf); | |
1641 | ||
1642 | d = rfcomm_dlc_get(s, dlci); | |
1643 | if (!d) { | |
1644 | rfcomm_send_dm(s, dlci); | |
1645 | goto drop; | |
1646 | } | |
1647 | ||
1648 | if (pf && d->cfc) { | |
1649 | u8 credits = *(u8 *) skb->data; skb_pull(skb, 1); | |
1650 | ||
1651 | d->tx_credits += credits; | |
1652 | if (d->tx_credits) | |
1653 | clear_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1654 | } | |
1655 | ||
1656 | if (skb->len && d->state == BT_CONNECTED) { | |
1657 | rfcomm_dlc_lock(d); | |
1658 | d->rx_credits--; | |
1659 | d->data_ready(d, skb); | |
1660 | rfcomm_dlc_unlock(d); | |
1661 | return 0; | |
1662 | } | |
1663 | ||
1664 | drop: | |
1665 | kfree_skb(skb); | |
1666 | return 0; | |
1667 | } | |
1668 | ||
1669 | static int rfcomm_recv_frame(struct rfcomm_session *s, struct sk_buff *skb) | |
1670 | { | |
1671 | struct rfcomm_hdr *hdr = (void *) skb->data; | |
1672 | u8 type, dlci, fcs; | |
1673 | ||
1674 | dlci = __get_dlci(hdr->addr); | |
1675 | type = __get_type(hdr->ctrl); | |
1676 | ||
1677 | /* Trim FCS */ | |
1678 | skb->len--; skb->tail--; | |
27a884dc | 1679 | fcs = *(u8 *)skb_tail_pointer(skb); |
1da177e4 LT |
1680 | |
1681 | if (__check_fcs(skb->data, type, fcs)) { | |
1682 | BT_ERR("bad checksum in packet"); | |
1683 | kfree_skb(skb); | |
1684 | return -EILSEQ; | |
1685 | } | |
1686 | ||
1687 | if (__test_ea(hdr->len)) | |
1688 | skb_pull(skb, 3); | |
1689 | else | |
1690 | skb_pull(skb, 4); | |
1691 | ||
1692 | switch (type) { | |
1693 | case RFCOMM_SABM: | |
1694 | if (__test_pf(hdr->ctrl)) | |
1695 | rfcomm_recv_sabm(s, dlci); | |
1696 | break; | |
1697 | ||
1698 | case RFCOMM_DISC: | |
1699 | if (__test_pf(hdr->ctrl)) | |
1700 | rfcomm_recv_disc(s, dlci); | |
1701 | break; | |
1702 | ||
1703 | case RFCOMM_UA: | |
1704 | if (__test_pf(hdr->ctrl)) | |
1705 | rfcomm_recv_ua(s, dlci); | |
1706 | break; | |
1707 | ||
1708 | case RFCOMM_DM: | |
1709 | rfcomm_recv_dm(s, dlci); | |
1710 | break; | |
1711 | ||
1712 | case RFCOMM_UIH: | |
1713 | if (dlci) | |
1714 | return rfcomm_recv_data(s, dlci, __test_pf(hdr->ctrl), skb); | |
1715 | ||
1716 | rfcomm_recv_mcc(s, skb); | |
1717 | break; | |
1718 | ||
1719 | default: | |
5017d8dd | 1720 | BT_ERR("Unknown packet type 0x%02x", type); |
1da177e4 LT |
1721 | break; |
1722 | } | |
1723 | kfree_skb(skb); | |
1724 | return 0; | |
1725 | } | |
1726 | ||
1727 | /* ---- Connection and data processing ---- */ | |
1728 | ||
1729 | static void rfcomm_process_connect(struct rfcomm_session *s) | |
1730 | { | |
1731 | struct rfcomm_dlc *d; | |
1732 | struct list_head *p, *n; | |
1733 | ||
1734 | BT_DBG("session %p state %ld", s, s->state); | |
1735 | ||
1736 | list_for_each_safe(p, n, &s->dlcs) { | |
1737 | d = list_entry(p, struct rfcomm_dlc, list); | |
1738 | if (d->state == BT_CONFIG) { | |
1739 | d->mtu = s->mtu; | |
9f2c8a03 | 1740 | if (rfcomm_check_security(d)) { |
8c1b2355 MH |
1741 | rfcomm_send_pn(s, 1, d); |
1742 | } else { | |
77db1980 MH |
1743 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); |
1744 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8c1b2355 | 1745 | } |
1da177e4 LT |
1746 | } |
1747 | } | |
1748 | } | |
1749 | ||
1750 | /* Send data queued for the DLC. | |
1751 | * Return number of frames left in the queue. | |
1752 | */ | |
1753 | static inline int rfcomm_process_tx(struct rfcomm_dlc *d) | |
1754 | { | |
1755 | struct sk_buff *skb; | |
1756 | int err; | |
1757 | ||
8e87d142 | 1758 | BT_DBG("dlc %p state %ld cfc %d rx_credits %d tx_credits %d", |
1da177e4 LT |
1759 | d, d->state, d->cfc, d->rx_credits, d->tx_credits); |
1760 | ||
1761 | /* Send pending MSC */ | |
1762 | if (test_and_clear_bit(RFCOMM_MSC_PENDING, &d->flags)) | |
8e87d142 | 1763 | rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); |
1da177e4 LT |
1764 | |
1765 | if (d->cfc) { | |
8e87d142 | 1766 | /* CFC enabled. |
1da177e4 LT |
1767 | * Give them some credits */ |
1768 | if (!test_bit(RFCOMM_RX_THROTTLED, &d->flags) && | |
8e87d142 | 1769 | d->rx_credits <= (d->cfc >> 2)) { |
1da177e4 LT |
1770 | rfcomm_send_credits(d->session, d->addr, d->cfc - d->rx_credits); |
1771 | d->rx_credits = d->cfc; | |
1772 | } | |
1773 | } else { | |
1774 | /* CFC disabled. | |
1775 | * Give ourselves some credits */ | |
1776 | d->tx_credits = 5; | |
1777 | } | |
1778 | ||
1779 | if (test_bit(RFCOMM_TX_THROTTLED, &d->flags)) | |
1780 | return skb_queue_len(&d->tx_queue); | |
1781 | ||
1782 | while (d->tx_credits && (skb = skb_dequeue(&d->tx_queue))) { | |
5436538f | 1783 | err = rfcomm_send_frame(d->session, skb->data, skb->len); |
1da177e4 LT |
1784 | if (err < 0) { |
1785 | skb_queue_head(&d->tx_queue, skb); | |
1786 | break; | |
1787 | } | |
1788 | kfree_skb(skb); | |
1789 | d->tx_credits--; | |
1790 | } | |
1791 | ||
1792 | if (d->cfc && !d->tx_credits) { | |
1793 | /* We're out of TX credits. | |
1794 | * Set TX_THROTTLED flag to avoid unnesary wakeups by dlc_send. */ | |
1795 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1796 | } | |
1797 | ||
1798 | return skb_queue_len(&d->tx_queue); | |
1799 | } | |
1800 | ||
1801 | static inline void rfcomm_process_dlcs(struct rfcomm_session *s) | |
1802 | { | |
1803 | struct rfcomm_dlc *d; | |
1804 | struct list_head *p, *n; | |
1805 | ||
1806 | BT_DBG("session %p state %ld", s, s->state); | |
1807 | ||
1808 | list_for_each_safe(p, n, &s->dlcs) { | |
1809 | d = list_entry(p, struct rfcomm_dlc, list); | |
1810 | ||
1811 | if (test_bit(RFCOMM_TIMED_OUT, &d->flags)) { | |
1812 | __rfcomm_dlc_close(d, ETIMEDOUT); | |
1813 | continue; | |
1814 | } | |
1815 | ||
db54467a SJ |
1816 | if (test_bit(RFCOMM_ENC_DROP, &d->flags)) { |
1817 | __rfcomm_dlc_close(d, ECONNREFUSED); | |
1818 | continue; | |
1819 | } | |
1820 | ||
1da177e4 LT |
1821 | if (test_and_clear_bit(RFCOMM_AUTH_ACCEPT, &d->flags)) { |
1822 | rfcomm_dlc_clear_timer(d); | |
77db1980 MH |
1823 | if (d->out) { |
1824 | rfcomm_send_pn(s, 1, d); | |
1825 | rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT); | |
bb23c0ab MH |
1826 | } else { |
1827 | if (d->defer_setup) { | |
1828 | set_bit(RFCOMM_DEFER_SETUP, &d->flags); | |
1829 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8bf47941 MH |
1830 | |
1831 | rfcomm_dlc_lock(d); | |
1832 | d->state = BT_CONNECT2; | |
1833 | d->state_change(d, 0); | |
1834 | rfcomm_dlc_unlock(d); | |
bb23c0ab MH |
1835 | } else |
1836 | rfcomm_dlc_accept(d); | |
1837 | } | |
1da177e4 LT |
1838 | continue; |
1839 | } else if (test_and_clear_bit(RFCOMM_AUTH_REJECT, &d->flags)) { | |
1840 | rfcomm_dlc_clear_timer(d); | |
77db1980 MH |
1841 | if (!d->out) |
1842 | rfcomm_send_dm(s, d->dlci); | |
1843 | else | |
1844 | d->state = BT_CLOSED; | |
1da177e4 LT |
1845 | __rfcomm_dlc_close(d, ECONNREFUSED); |
1846 | continue; | |
1847 | } | |
1848 | ||
6e1031a4 JG |
1849 | if (test_bit(RFCOMM_SEC_PENDING, &d->flags)) |
1850 | continue; | |
1851 | ||
1da177e4 LT |
1852 | if (test_bit(RFCOMM_TX_THROTTLED, &s->flags)) |
1853 | continue; | |
1854 | ||
1855 | if ((d->state == BT_CONNECTED || d->state == BT_DISCONN) && | |
77db1980 | 1856 | d->mscex == RFCOMM_MSCEX_OK) |
1da177e4 LT |
1857 | rfcomm_process_tx(d); |
1858 | } | |
1859 | } | |
1860 | ||
1861 | static inline void rfcomm_process_rx(struct rfcomm_session *s) | |
1862 | { | |
1863 | struct socket *sock = s->sock; | |
1864 | struct sock *sk = sock->sk; | |
1865 | struct sk_buff *skb; | |
1866 | ||
1867 | BT_DBG("session %p state %ld qlen %d", s, s->state, skb_queue_len(&sk->sk_receive_queue)); | |
1868 | ||
1869 | /* Get data directly from socket receive queue without copying it. */ | |
1870 | while ((skb = skb_dequeue(&sk->sk_receive_queue))) { | |
1871 | skb_orphan(skb); | |
44935720 MM |
1872 | if (!skb_linearize(skb)) |
1873 | rfcomm_recv_frame(s, skb); | |
1874 | else | |
1875 | kfree_skb(skb); | |
1da177e4 LT |
1876 | } |
1877 | ||
1878 | if (sk->sk_state == BT_CLOSED) { | |
1879 | if (!s->initiator) | |
1880 | rfcomm_session_put(s); | |
1881 | ||
1882 | rfcomm_session_close(s, sk->sk_err); | |
1883 | } | |
1884 | } | |
1885 | ||
1886 | static inline void rfcomm_accept_connection(struct rfcomm_session *s) | |
1887 | { | |
1888 | struct socket *sock = s->sock, *nsock; | |
1889 | int err; | |
1890 | ||
1891 | /* Fast check for a new connection. | |
1892 | * Avoids unnesesary socket allocations. */ | |
1893 | if (list_empty(&bt_sk(sock->sk)->accept_q)) | |
1894 | return; | |
1895 | ||
1896 | BT_DBG("session %p", s); | |
1897 | ||
48db9ca4 MH |
1898 | err = kernel_accept(sock, &nsock, O_NONBLOCK); |
1899 | if (err < 0) | |
1da177e4 LT |
1900 | return; |
1901 | ||
1da177e4 LT |
1902 | /* Set our callbacks */ |
1903 | nsock->sk->sk_data_ready = rfcomm_l2data_ready; | |
1904 | nsock->sk->sk_state_change = rfcomm_l2state_change; | |
1905 | ||
1906 | s = rfcomm_session_add(nsock, BT_OPEN); | |
1907 | if (s) { | |
1908 | rfcomm_session_hold(s); | |
98bcd08b MH |
1909 | |
1910 | /* We should adjust MTU on incoming sessions. | |
1911 | * L2CAP MTU minus UIH header and FCS. */ | |
0c1bc5c6 GP |
1912 | s->mtu = min(l2cap_pi(nsock->sk)->chan->omtu, |
1913 | l2cap_pi(nsock->sk)->chan->imtu) - 5; | |
98bcd08b | 1914 | |
534c92fd | 1915 | rfcomm_schedule(); |
1da177e4 LT |
1916 | } else |
1917 | sock_release(nsock); | |
1918 | } | |
1919 | ||
1920 | static inline void rfcomm_check_connection(struct rfcomm_session *s) | |
1921 | { | |
1922 | struct sock *sk = s->sock->sk; | |
1923 | ||
1924 | BT_DBG("%p state %ld", s, s->state); | |
1925 | ||
285b4e90 | 1926 | switch (sk->sk_state) { |
1da177e4 LT |
1927 | case BT_CONNECTED: |
1928 | s->state = BT_CONNECT; | |
1929 | ||
1930 | /* We can adjust MTU on outgoing sessions. | |
1931 | * L2CAP MTU minus UIH header and FCS. */ | |
0c1bc5c6 | 1932 | s->mtu = min(l2cap_pi(sk)->chan->omtu, l2cap_pi(sk)->chan->imtu) - 5; |
1da177e4 LT |
1933 | |
1934 | rfcomm_send_sabm(s, 0); | |
1935 | break; | |
1936 | ||
1937 | case BT_CLOSED: | |
1938 | s->state = BT_CLOSED; | |
1939 | rfcomm_session_close(s, sk->sk_err); | |
1940 | break; | |
1941 | } | |
1942 | } | |
1943 | ||
1944 | static inline void rfcomm_process_sessions(void) | |
1945 | { | |
1946 | struct list_head *p, *n; | |
1947 | ||
1948 | rfcomm_lock(); | |
1949 | ||
1950 | list_for_each_safe(p, n, &session_list) { | |
1951 | struct rfcomm_session *s; | |
1952 | s = list_entry(p, struct rfcomm_session, list); | |
1953 | ||
9e726b17 LAD |
1954 | if (test_and_clear_bit(RFCOMM_TIMED_OUT, &s->flags)) { |
1955 | s->state = BT_DISCONN; | |
1956 | rfcomm_send_disc(s, 0); | |
485f1eff | 1957 | rfcomm_session_put(s); |
9e726b17 LAD |
1958 | continue; |
1959 | } | |
1960 | ||
1da177e4 LT |
1961 | if (s->state == BT_LISTEN) { |
1962 | rfcomm_accept_connection(s); | |
1963 | continue; | |
1964 | } | |
1965 | ||
1966 | rfcomm_session_hold(s); | |
1967 | ||
1968 | switch (s->state) { | |
1969 | case BT_BOUND: | |
1970 | rfcomm_check_connection(s); | |
1971 | break; | |
1972 | ||
1973 | default: | |
1974 | rfcomm_process_rx(s); | |
1975 | break; | |
1976 | } | |
1977 | ||
1978 | rfcomm_process_dlcs(s); | |
1979 | ||
1980 | rfcomm_session_put(s); | |
1981 | } | |
1982 | ||
1983 | rfcomm_unlock(); | |
1984 | } | |
1985 | ||
1da177e4 LT |
1986 | static int rfcomm_add_listener(bdaddr_t *ba) |
1987 | { | |
1988 | struct sockaddr_l2 addr; | |
1989 | struct socket *sock; | |
1990 | struct sock *sk; | |
1991 | struct rfcomm_session *s; | |
1992 | int err = 0; | |
1993 | ||
1994 | /* Create socket */ | |
1995 | err = rfcomm_l2sock_create(&sock); | |
8e87d142 | 1996 | if (err < 0) { |
1da177e4 LT |
1997 | BT_ERR("Create socket failed %d", err); |
1998 | return err; | |
1999 | } | |
2000 | ||
2001 | /* Bind socket */ | |
2002 | bacpy(&addr.l2_bdaddr, ba); | |
2003 | addr.l2_family = AF_BLUETOOTH; | |
b4324b5d | 2004 | addr.l2_psm = cpu_to_le16(RFCOMM_PSM); |
37e62f55 | 2005 | addr.l2_cid = 0; |
48db9ca4 | 2006 | err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); |
1da177e4 LT |
2007 | if (err < 0) { |
2008 | BT_ERR("Bind failed %d", err); | |
2009 | goto failed; | |
2010 | } | |
2011 | ||
2012 | /* Set L2CAP options */ | |
2013 | sk = sock->sk; | |
2014 | lock_sock(sk); | |
0c1bc5c6 | 2015 | l2cap_pi(sk)->chan->imtu = l2cap_mtu; |
1da177e4 LT |
2016 | release_sock(sk); |
2017 | ||
2018 | /* Start listening on the socket */ | |
48db9ca4 | 2019 | err = kernel_listen(sock, 10); |
1da177e4 LT |
2020 | if (err) { |
2021 | BT_ERR("Listen failed %d", err); | |
2022 | goto failed; | |
2023 | } | |
2024 | ||
2025 | /* Add listening session */ | |
2026 | s = rfcomm_session_add(sock, BT_LISTEN); | |
2027 | if (!s) | |
2028 | goto failed; | |
2029 | ||
2030 | rfcomm_session_hold(s); | |
2031 | return 0; | |
2032 | failed: | |
2033 | sock_release(sock); | |
2034 | return err; | |
2035 | } | |
2036 | ||
2037 | static void rfcomm_kill_listener(void) | |
2038 | { | |
2039 | struct rfcomm_session *s; | |
2040 | struct list_head *p, *n; | |
2041 | ||
2042 | BT_DBG(""); | |
2043 | ||
2044 | list_for_each_safe(p, n, &session_list) { | |
2045 | s = list_entry(p, struct rfcomm_session, list); | |
2046 | rfcomm_session_del(s); | |
2047 | } | |
2048 | } | |
2049 | ||
2050 | static int rfcomm_run(void *unused) | |
2051 | { | |
a524eccc | 2052 | BT_DBG(""); |
1da177e4 | 2053 | |
1da177e4 | 2054 | set_user_nice(current, -10); |
1da177e4 | 2055 | |
1da177e4 LT |
2056 | rfcomm_add_listener(BDADDR_ANY); |
2057 | ||
e5842cdb | 2058 | while (1) { |
a524eccc | 2059 | set_current_state(TASK_INTERRUPTIBLE); |
e5842cdb PH |
2060 | |
2061 | if (kthread_should_stop()) | |
2062 | break; | |
a524eccc MH |
2063 | |
2064 | /* Process stuff */ | |
a524eccc | 2065 | rfcomm_process_sessions(); |
e5842cdb PH |
2066 | |
2067 | schedule(); | |
a524eccc | 2068 | } |
e5842cdb | 2069 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
2070 | |
2071 | rfcomm_kill_listener(); | |
2072 | ||
1da177e4 LT |
2073 | return 0; |
2074 | } | |
2075 | ||
8c1b2355 | 2076 | static void rfcomm_security_cfm(struct hci_conn *conn, u8 status, u8 encrypt) |
1da177e4 LT |
2077 | { |
2078 | struct rfcomm_session *s; | |
2079 | struct rfcomm_dlc *d; | |
2080 | struct list_head *p, *n; | |
2081 | ||
2082 | BT_DBG("conn %p status 0x%02x encrypt 0x%02x", conn, status, encrypt); | |
2083 | ||
2084 | s = rfcomm_session_get(&conn->hdev->bdaddr, &conn->dst); | |
2085 | if (!s) | |
2086 | return; | |
2087 | ||
2088 | rfcomm_session_hold(s); | |
2089 | ||
2090 | list_for_each_safe(p, n, &s->dlcs) { | |
2091 | d = list_entry(p, struct rfcomm_dlc, list); | |
2092 | ||
8c84b830 MH |
2093 | if (test_and_clear_bit(RFCOMM_SEC_PENDING, &d->flags)) { |
2094 | rfcomm_dlc_clear_timer(d); | |
2095 | if (status || encrypt == 0x00) { | |
db54467a | 2096 | set_bit(RFCOMM_ENC_DROP, &d->flags); |
8c84b830 MH |
2097 | continue; |
2098 | } | |
2099 | } | |
2100 | ||
2101 | if (d->state == BT_CONNECTED && !status && encrypt == 0x00) { | |
2102 | if (d->sec_level == BT_SECURITY_MEDIUM) { | |
2103 | set_bit(RFCOMM_SEC_PENDING, &d->flags); | |
2104 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
2105 | continue; | |
2106 | } else if (d->sec_level == BT_SECURITY_HIGH) { | |
db54467a | 2107 | set_bit(RFCOMM_ENC_DROP, &d->flags); |
8c84b830 MH |
2108 | continue; |
2109 | } | |
9719f8af MH |
2110 | } |
2111 | ||
1da177e4 LT |
2112 | if (!test_and_clear_bit(RFCOMM_AUTH_PENDING, &d->flags)) |
2113 | continue; | |
2114 | ||
b3b1b061 | 2115 | if (!status && hci_conn_check_secure(conn, d->sec_level)) |
1da177e4 LT |
2116 | set_bit(RFCOMM_AUTH_ACCEPT, &d->flags); |
2117 | else | |
2118 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
2119 | } | |
2120 | ||
2121 | rfcomm_session_put(s); | |
2122 | ||
534c92fd | 2123 | rfcomm_schedule(); |
1da177e4 LT |
2124 | } |
2125 | ||
2126 | static struct hci_cb rfcomm_cb = { | |
2127 | .name = "RFCOMM", | |
8c1b2355 | 2128 | .security_cfm = rfcomm_security_cfm |
1da177e4 LT |
2129 | }; |
2130 | ||
aef7d97c | 2131 | static int rfcomm_dlc_debugfs_show(struct seq_file *f, void *x) |
1da177e4 LT |
2132 | { |
2133 | struct rfcomm_session *s; | |
1da177e4 LT |
2134 | |
2135 | rfcomm_lock(); | |
2136 | ||
8035ded4 LAD |
2137 | list_for_each_entry(s, &session_list, list) { |
2138 | struct rfcomm_dlc *d; | |
2139 | list_for_each_entry(d, &s->dlcs, list) { | |
be9d1227 | 2140 | struct sock *sk = s->sock->sk; |
1da177e4 | 2141 | |
aef7d97c MH |
2142 | seq_printf(f, "%s %s %ld %d %d %d %d\n", |
2143 | batostr(&bt_sk(sk)->src), | |
2144 | batostr(&bt_sk(sk)->dst), | |
2145 | d->state, d->dlci, d->mtu, | |
2146 | d->rx_credits, d->tx_credits); | |
1da177e4 LT |
2147 | } |
2148 | } | |
1da177e4 | 2149 | |
1da177e4 | 2150 | rfcomm_unlock(); |
1da177e4 | 2151 | |
aef7d97c MH |
2152 | return 0; |
2153 | } | |
2154 | ||
2155 | static int rfcomm_dlc_debugfs_open(struct inode *inode, struct file *file) | |
2156 | { | |
2157 | return single_open(file, rfcomm_dlc_debugfs_show, inode->i_private); | |
1da177e4 LT |
2158 | } |
2159 | ||
aef7d97c MH |
2160 | static const struct file_operations rfcomm_dlc_debugfs_fops = { |
2161 | .open = rfcomm_dlc_debugfs_open, | |
2162 | .read = seq_read, | |
2163 | .llseek = seq_lseek, | |
2164 | .release = single_release, | |
2165 | }; | |
2166 | ||
2167 | static struct dentry *rfcomm_dlc_debugfs; | |
1da177e4 LT |
2168 | |
2169 | /* ---- Initialization ---- */ | |
2170 | static int __init rfcomm_init(void) | |
2171 | { | |
52d18347 | 2172 | int err; |
af0d3b10 | 2173 | |
1da177e4 LT |
2174 | hci_register_cb(&rfcomm_cb); |
2175 | ||
a524eccc MH |
2176 | rfcomm_thread = kthread_run(rfcomm_run, NULL, "krfcommd"); |
2177 | if (IS_ERR(rfcomm_thread)) { | |
52d18347 MH |
2178 | err = PTR_ERR(rfcomm_thread); |
2179 | goto unregister; | |
a524eccc | 2180 | } |
1da177e4 | 2181 | |
aef7d97c MH |
2182 | if (bt_debugfs) { |
2183 | rfcomm_dlc_debugfs = debugfs_create_file("rfcomm_dlc", 0444, | |
2184 | bt_debugfs, NULL, &rfcomm_dlc_debugfs_fops); | |
2185 | if (!rfcomm_dlc_debugfs) | |
2186 | BT_ERR("Failed to create RFCOMM debug file"); | |
2187 | } | |
1da177e4 | 2188 | |
52d18347 MH |
2189 | err = rfcomm_init_ttys(); |
2190 | if (err < 0) | |
2191 | goto stop; | |
1da177e4 | 2192 | |
52d18347 MH |
2193 | err = rfcomm_init_sockets(); |
2194 | if (err < 0) | |
2195 | goto cleanup; | |
1da177e4 | 2196 | |
be9d1227 MH |
2197 | BT_INFO("RFCOMM ver %s", VERSION); |
2198 | ||
1da177e4 | 2199 | return 0; |
af0d3b10 | 2200 | |
52d18347 | 2201 | cleanup: |
af0d3b10 | 2202 | rfcomm_cleanup_ttys(); |
52d18347 MH |
2203 | |
2204 | stop: | |
af0d3b10 | 2205 | kthread_stop(rfcomm_thread); |
52d18347 MH |
2206 | |
2207 | unregister: | |
af0d3b10 DY |
2208 | hci_unregister_cb(&rfcomm_cb); |
2209 | ||
52d18347 | 2210 | return err; |
1da177e4 LT |
2211 | } |
2212 | ||
2213 | static void __exit rfcomm_exit(void) | |
2214 | { | |
aef7d97c | 2215 | debugfs_remove(rfcomm_dlc_debugfs); |
be9d1227 | 2216 | |
1da177e4 LT |
2217 | hci_unregister_cb(&rfcomm_cb); |
2218 | ||
a524eccc | 2219 | kthread_stop(rfcomm_thread); |
1da177e4 | 2220 | |
1da177e4 | 2221 | rfcomm_cleanup_ttys(); |
1da177e4 LT |
2222 | |
2223 | rfcomm_cleanup_sockets(); | |
1da177e4 LT |
2224 | } |
2225 | ||
2226 | module_init(rfcomm_init); | |
2227 | module_exit(rfcomm_exit); | |
2228 | ||
7c2660b0 MH |
2229 | module_param(disable_cfc, bool, 0644); |
2230 | MODULE_PARM_DESC(disable_cfc, "Disable credit based flow control"); | |
2231 | ||
98bcd08b MH |
2232 | module_param(channel_mtu, int, 0644); |
2233 | MODULE_PARM_DESC(channel_mtu, "Default MTU for the RFCOMM channel"); | |
2234 | ||
56f3a40a MH |
2235 | module_param(l2cap_mtu, uint, 0644); |
2236 | MODULE_PARM_DESC(l2cap_mtu, "Default MTU for the L2CAP connection"); | |
2237 | ||
eae38eed MH |
2238 | module_param(l2cap_ertm, bool, 0644); |
2239 | MODULE_PARM_DESC(l2cap_ertm, "Use L2CAP ERTM mode for connection"); | |
2240 | ||
63fbd24e | 2241 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
2242 | MODULE_DESCRIPTION("Bluetooth RFCOMM ver " VERSION); |
2243 | MODULE_VERSION(VERSION); | |
2244 | MODULE_LICENSE("GPL"); | |
2245 | MODULE_ALIAS("bt-proto-3"); |