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 | 28 | #include <linux/module.h> |
aef7d97c | 29 | #include <linux/debugfs.h> |
a524eccc | 30 | #include <linux/kthread.h> |
1da177e4 LT |
31 | #include <asm/unaligned.h> |
32 | ||
33 | #include <net/bluetooth/bluetooth.h> | |
34 | #include <net/bluetooth/hci_core.h> | |
35 | #include <net/bluetooth/l2cap.h> | |
36 | #include <net/bluetooth/rfcomm.h> | |
37 | ||
5f9018af | 38 | #define VERSION "1.11" |
56f3a40a | 39 | |
eb939922 RR |
40 | static bool disable_cfc; |
41 | static bool l2cap_ertm; | |
98bcd08b | 42 | static int channel_mtu = -1; |
56f3a40a MH |
43 | static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU; |
44 | ||
1da177e4 LT |
45 | static struct task_struct *rfcomm_thread; |
46 | ||
4a3e2f71 AV |
47 | static DEFINE_MUTEX(rfcomm_mutex); |
48 | #define rfcomm_lock() mutex_lock(&rfcomm_mutex) | |
49 | #define rfcomm_unlock() mutex_unlock(&rfcomm_mutex) | |
1da177e4 | 50 | |
1da177e4 LT |
51 | |
52 | static LIST_HEAD(session_list); | |
1da177e4 | 53 | |
5436538f | 54 | static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len); |
1da177e4 LT |
55 | static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci); |
56 | static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci); | |
57 | static int rfcomm_queue_disc(struct rfcomm_dlc *d); | |
58 | static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type); | |
59 | static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d); | |
60 | static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig); | |
61 | static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len); | |
62 | static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits); | |
63 | static void rfcomm_make_uih(struct sk_buff *skb, u8 addr); | |
64 | ||
65 | static void rfcomm_process_connect(struct rfcomm_session *s); | |
66 | ||
63ce0900 LAD |
67 | static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, |
68 | bdaddr_t *dst, | |
69 | u8 sec_level, | |
70 | int *err); | |
1da177e4 LT |
71 | static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst); |
72 | static void rfcomm_session_del(struct rfcomm_session *s); | |
73 | ||
74 | /* ---- RFCOMM frame parsing macros ---- */ | |
75 | #define __get_dlci(b) ((b & 0xfc) >> 2) | |
76 | #define __get_channel(b) ((b & 0xf8) >> 3) | |
77 | #define __get_dir(b) ((b & 0x04) >> 2) | |
78 | #define __get_type(b) ((b & 0xef)) | |
79 | ||
80 | #define __test_ea(b) ((b & 0x01)) | |
81 | #define __test_cr(b) ((b & 0x02)) | |
82 | #define __test_pf(b) ((b & 0x10)) | |
83 | ||
84 | #define __addr(cr, dlci) (((dlci & 0x3f) << 2) | (cr << 1) | 0x01) | |
85 | #define __ctrl(type, pf) (((type & 0xef) | (pf << 4))) | |
86 | #define __dlci(dir, chn) (((chn & 0x1f) << 1) | dir) | |
87 | #define __srv_channel(dlci) (dlci >> 1) | |
88 | #define __dir(dlci) (dlci & 0x01) | |
89 | ||
90 | #define __len8(len) (((len) << 1) | 1) | |
91 | #define __len16(len) ((len) << 1) | |
92 | ||
93 | /* MCC macros */ | |
94 | #define __mcc_type(cr, type) (((type << 2) | (cr << 1) | 0x01)) | |
95 | #define __get_mcc_type(b) ((b & 0xfc) >> 2) | |
96 | #define __get_mcc_len(b) ((b & 0xfe) >> 1) | |
97 | ||
98 | /* RPN macros */ | |
3a5e903c | 99 | #define __rpn_line_settings(data, stop, parity) ((data & 0x3) | ((stop & 0x1) << 2) | ((parity & 0x7) << 3)) |
1da177e4 LT |
100 | #define __get_rpn_data_bits(line) ((line) & 0x3) |
101 | #define __get_rpn_stop_bits(line) (((line) >> 2) & 0x1) | |
3a5e903c | 102 | #define __get_rpn_parity(line) (((line) >> 3) & 0x7) |
1da177e4 | 103 | |
6039aa73 | 104 | static void rfcomm_schedule(void) |
1da177e4 LT |
105 | { |
106 | if (!rfcomm_thread) | |
107 | return; | |
1da177e4 LT |
108 | wake_up_process(rfcomm_thread); |
109 | } | |
110 | ||
6039aa73 | 111 | static void rfcomm_session_put(struct rfcomm_session *s) |
1da177e4 LT |
112 | { |
113 | if (atomic_dec_and_test(&s->refcnt)) | |
114 | rfcomm_session_del(s); | |
115 | } | |
116 | ||
117 | /* ---- RFCOMM FCS computation ---- */ | |
118 | ||
408c1ce2 | 119 | /* reversed, 8-bit, poly=0x07 */ |
8e87d142 | 120 | static unsigned char rfcomm_crc_table[256] = { |
408c1ce2 MH |
121 | 0x00, 0x91, 0xe3, 0x72, 0x07, 0x96, 0xe4, 0x75, |
122 | 0x0e, 0x9f, 0xed, 0x7c, 0x09, 0x98, 0xea, 0x7b, | |
123 | 0x1c, 0x8d, 0xff, 0x6e, 0x1b, 0x8a, 0xf8, 0x69, | |
124 | 0x12, 0x83, 0xf1, 0x60, 0x15, 0x84, 0xf6, 0x67, | |
125 | ||
126 | 0x38, 0xa9, 0xdb, 0x4a, 0x3f, 0xae, 0xdc, 0x4d, | |
127 | 0x36, 0xa7, 0xd5, 0x44, 0x31, 0xa0, 0xd2, 0x43, | |
128 | 0x24, 0xb5, 0xc7, 0x56, 0x23, 0xb2, 0xc0, 0x51, | |
129 | 0x2a, 0xbb, 0xc9, 0x58, 0x2d, 0xbc, 0xce, 0x5f, | |
130 | ||
131 | 0x70, 0xe1, 0x93, 0x02, 0x77, 0xe6, 0x94, 0x05, | |
132 | 0x7e, 0xef, 0x9d, 0x0c, 0x79, 0xe8, 0x9a, 0x0b, | |
133 | 0x6c, 0xfd, 0x8f, 0x1e, 0x6b, 0xfa, 0x88, 0x19, | |
134 | 0x62, 0xf3, 0x81, 0x10, 0x65, 0xf4, 0x86, 0x17, | |
135 | ||
136 | 0x48, 0xd9, 0xab, 0x3a, 0x4f, 0xde, 0xac, 0x3d, | |
137 | 0x46, 0xd7, 0xa5, 0x34, 0x41, 0xd0, 0xa2, 0x33, | |
138 | 0x54, 0xc5, 0xb7, 0x26, 0x53, 0xc2, 0xb0, 0x21, | |
139 | 0x5a, 0xcb, 0xb9, 0x28, 0x5d, 0xcc, 0xbe, 0x2f, | |
140 | ||
141 | 0xe0, 0x71, 0x03, 0x92, 0xe7, 0x76, 0x04, 0x95, | |
142 | 0xee, 0x7f, 0x0d, 0x9c, 0xe9, 0x78, 0x0a, 0x9b, | |
143 | 0xfc, 0x6d, 0x1f, 0x8e, 0xfb, 0x6a, 0x18, 0x89, | |
144 | 0xf2, 0x63, 0x11, 0x80, 0xf5, 0x64, 0x16, 0x87, | |
145 | ||
146 | 0xd8, 0x49, 0x3b, 0xaa, 0xdf, 0x4e, 0x3c, 0xad, | |
147 | 0xd6, 0x47, 0x35, 0xa4, 0xd1, 0x40, 0x32, 0xa3, | |
148 | 0xc4, 0x55, 0x27, 0xb6, 0xc3, 0x52, 0x20, 0xb1, | |
149 | 0xca, 0x5b, 0x29, 0xb8, 0xcd, 0x5c, 0x2e, 0xbf, | |
150 | ||
151 | 0x90, 0x01, 0x73, 0xe2, 0x97, 0x06, 0x74, 0xe5, | |
152 | 0x9e, 0x0f, 0x7d, 0xec, 0x99, 0x08, 0x7a, 0xeb, | |
153 | 0x8c, 0x1d, 0x6f, 0xfe, 0x8b, 0x1a, 0x68, 0xf9, | |
154 | 0x82, 0x13, 0x61, 0xf0, 0x85, 0x14, 0x66, 0xf7, | |
155 | ||
156 | 0xa8, 0x39, 0x4b, 0xda, 0xaf, 0x3e, 0x4c, 0xdd, | |
157 | 0xa6, 0x37, 0x45, 0xd4, 0xa1, 0x30, 0x42, 0xd3, | |
158 | 0xb4, 0x25, 0x57, 0xc6, 0xb3, 0x22, 0x50, 0xc1, | |
159 | 0xba, 0x2b, 0x59, 0xc8, 0xbd, 0x2c, 0x5e, 0xcf | |
160 | }; | |
161 | ||
1da177e4 LT |
162 | /* CRC on 2 bytes */ |
163 | #define __crc(data) (rfcomm_crc_table[rfcomm_crc_table[0xff ^ data[0]] ^ data[1]]) | |
164 | ||
8e87d142 | 165 | /* FCS on 2 bytes */ |
1da177e4 LT |
166 | static inline u8 __fcs(u8 *data) |
167 | { | |
a02cec21 | 168 | return 0xff - __crc(data); |
1da177e4 LT |
169 | } |
170 | ||
8e87d142 | 171 | /* FCS on 3 bytes */ |
1da177e4 LT |
172 | static inline u8 __fcs2(u8 *data) |
173 | { | |
a02cec21 | 174 | return 0xff - rfcomm_crc_table[__crc(data) ^ data[2]]; |
1da177e4 LT |
175 | } |
176 | ||
177 | /* Check FCS */ | |
178 | static inline int __check_fcs(u8 *data, int type, u8 fcs) | |
179 | { | |
180 | u8 f = __crc(data); | |
181 | ||
182 | if (type != RFCOMM_UIH) | |
183 | f = rfcomm_crc_table[f ^ data[2]]; | |
184 | ||
185 | return rfcomm_crc_table[f ^ fcs] != 0xcf; | |
186 | } | |
187 | ||
188 | /* ---- L2CAP callbacks ---- */ | |
189 | static void rfcomm_l2state_change(struct sock *sk) | |
190 | { | |
191 | BT_DBG("%p state %d", sk, sk->sk_state); | |
534c92fd | 192 | rfcomm_schedule(); |
1da177e4 LT |
193 | } |
194 | ||
195 | static void rfcomm_l2data_ready(struct sock *sk, int bytes) | |
196 | { | |
197 | BT_DBG("%p bytes %d", sk, bytes); | |
534c92fd | 198 | rfcomm_schedule(); |
1da177e4 LT |
199 | } |
200 | ||
201 | static int rfcomm_l2sock_create(struct socket **sock) | |
202 | { | |
203 | int err; | |
204 | ||
205 | BT_DBG(""); | |
206 | ||
207 | err = sock_create_kern(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP, sock); | |
208 | if (!err) { | |
209 | struct sock *sk = (*sock)->sk; | |
210 | sk->sk_data_ready = rfcomm_l2data_ready; | |
211 | sk->sk_state_change = rfcomm_l2state_change; | |
212 | } | |
213 | return err; | |
214 | } | |
215 | ||
6039aa73 | 216 | static int rfcomm_check_security(struct rfcomm_dlc *d) |
77db1980 MH |
217 | { |
218 | struct sock *sk = d->session->sock->sk; | |
8c1d787b GP |
219 | struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; |
220 | ||
0684e5f9 MH |
221 | __u8 auth_type; |
222 | ||
223 | switch (d->sec_level) { | |
224 | case BT_SECURITY_HIGH: | |
225 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
226 | break; | |
227 | case BT_SECURITY_MEDIUM: | |
228 | auth_type = HCI_AT_GENERAL_BONDING; | |
229 | break; | |
230 | default: | |
231 | auth_type = HCI_AT_NO_BONDING; | |
232 | break; | |
233 | } | |
77db1980 | 234 | |
8c1d787b | 235 | return hci_conn_security(conn->hcon, d->sec_level, auth_type); |
77db1980 MH |
236 | } |
237 | ||
9e726b17 LAD |
238 | static void rfcomm_session_timeout(unsigned long arg) |
239 | { | |
240 | struct rfcomm_session *s = (void *) arg; | |
241 | ||
242 | BT_DBG("session %p state %ld", s, s->state); | |
243 | ||
244 | set_bit(RFCOMM_TIMED_OUT, &s->flags); | |
534c92fd | 245 | rfcomm_schedule(); |
9e726b17 LAD |
246 | } |
247 | ||
248 | static void rfcomm_session_set_timer(struct rfcomm_session *s, long timeout) | |
249 | { | |
250 | BT_DBG("session %p state %ld timeout %ld", s, s->state, timeout); | |
251 | ||
252 | if (!mod_timer(&s->timer, jiffies + timeout)) | |
253 | rfcomm_session_hold(s); | |
254 | } | |
255 | ||
256 | static void rfcomm_session_clear_timer(struct rfcomm_session *s) | |
257 | { | |
258 | BT_DBG("session %p state %ld", s, s->state); | |
259 | ||
25cc4ae9 | 260 | if (del_timer(&s->timer)) |
9e726b17 LAD |
261 | rfcomm_session_put(s); |
262 | } | |
263 | ||
1da177e4 LT |
264 | /* ---- RFCOMM DLCs ---- */ |
265 | static void rfcomm_dlc_timeout(unsigned long arg) | |
266 | { | |
267 | struct rfcomm_dlc *d = (void *) arg; | |
268 | ||
269 | BT_DBG("dlc %p state %ld", d, d->state); | |
270 | ||
271 | set_bit(RFCOMM_TIMED_OUT, &d->flags); | |
272 | rfcomm_dlc_put(d); | |
534c92fd | 273 | rfcomm_schedule(); |
1da177e4 LT |
274 | } |
275 | ||
276 | static void rfcomm_dlc_set_timer(struct rfcomm_dlc *d, long timeout) | |
277 | { | |
278 | BT_DBG("dlc %p state %ld timeout %ld", d, d->state, timeout); | |
279 | ||
280 | if (!mod_timer(&d->timer, jiffies + timeout)) | |
281 | rfcomm_dlc_hold(d); | |
282 | } | |
283 | ||
284 | static void rfcomm_dlc_clear_timer(struct rfcomm_dlc *d) | |
285 | { | |
286 | BT_DBG("dlc %p state %ld", d, d->state); | |
287 | ||
25cc4ae9 | 288 | if (del_timer(&d->timer)) |
1da177e4 LT |
289 | rfcomm_dlc_put(d); |
290 | } | |
291 | ||
292 | static void rfcomm_dlc_clear_state(struct rfcomm_dlc *d) | |
293 | { | |
294 | BT_DBG("%p", d); | |
295 | ||
296 | d->state = BT_OPEN; | |
297 | d->flags = 0; | |
298 | d->mscex = 0; | |
183f732c | 299 | d->sec_level = BT_SECURITY_LOW; |
1da177e4 LT |
300 | d->mtu = RFCOMM_DEFAULT_MTU; |
301 | d->v24_sig = RFCOMM_V24_RTC | RFCOMM_V24_RTR | RFCOMM_V24_DV; | |
302 | ||
303 | d->cfc = RFCOMM_CFC_DISABLED; | |
304 | d->rx_credits = RFCOMM_DEFAULT_CREDITS; | |
305 | } | |
306 | ||
dd0fc66f | 307 | struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio) |
1da177e4 | 308 | { |
25ea6db0 MH |
309 | struct rfcomm_dlc *d = kzalloc(sizeof(*d), prio); |
310 | ||
1da177e4 LT |
311 | if (!d) |
312 | return NULL; | |
1da177e4 | 313 | |
b24b8a24 | 314 | setup_timer(&d->timer, rfcomm_dlc_timeout, (unsigned long)d); |
1da177e4 LT |
315 | |
316 | skb_queue_head_init(&d->tx_queue); | |
317 | spin_lock_init(&d->lock); | |
318 | atomic_set(&d->refcnt, 1); | |
319 | ||
320 | rfcomm_dlc_clear_state(d); | |
8e87d142 | 321 | |
1da177e4 | 322 | BT_DBG("%p", d); |
25ea6db0 | 323 | |
1da177e4 LT |
324 | return d; |
325 | } | |
326 | ||
327 | void rfcomm_dlc_free(struct rfcomm_dlc *d) | |
328 | { | |
329 | BT_DBG("%p", d); | |
330 | ||
331 | skb_queue_purge(&d->tx_queue); | |
332 | kfree(d); | |
333 | } | |
334 | ||
335 | static void rfcomm_dlc_link(struct rfcomm_session *s, struct rfcomm_dlc *d) | |
336 | { | |
337 | BT_DBG("dlc %p session %p", d, s); | |
338 | ||
339 | rfcomm_session_hold(s); | |
340 | ||
9e726b17 | 341 | rfcomm_session_clear_timer(s); |
1da177e4 LT |
342 | rfcomm_dlc_hold(d); |
343 | list_add(&d->list, &s->dlcs); | |
344 | d->session = s; | |
345 | } | |
346 | ||
347 | static void rfcomm_dlc_unlink(struct rfcomm_dlc *d) | |
348 | { | |
349 | struct rfcomm_session *s = d->session; | |
350 | ||
351 | BT_DBG("dlc %p refcnt %d session %p", d, atomic_read(&d->refcnt), s); | |
352 | ||
353 | list_del(&d->list); | |
354 | d->session = NULL; | |
355 | rfcomm_dlc_put(d); | |
356 | ||
9e726b17 LAD |
357 | if (list_empty(&s->dlcs)) |
358 | rfcomm_session_set_timer(s, RFCOMM_IDLE_TIMEOUT); | |
359 | ||
1da177e4 LT |
360 | rfcomm_session_put(s); |
361 | } | |
362 | ||
363 | static struct rfcomm_dlc *rfcomm_dlc_get(struct rfcomm_session *s, u8 dlci) | |
364 | { | |
365 | struct rfcomm_dlc *d; | |
1da177e4 | 366 | |
8035ded4 | 367 | list_for_each_entry(d, &s->dlcs, list) |
1da177e4 LT |
368 | if (d->dlci == dlci) |
369 | return d; | |
8035ded4 | 370 | |
1da177e4 LT |
371 | return NULL; |
372 | } | |
373 | ||
374 | static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) | |
375 | { | |
376 | struct rfcomm_session *s; | |
377 | int err = 0; | |
378 | u8 dlci; | |
379 | ||
6ed93dc6 AE |
380 | BT_DBG("dlc %p state %ld %pMR -> %pMR channel %d", |
381 | d, d->state, src, dst, channel); | |
1da177e4 LT |
382 | |
383 | if (channel < 1 || channel > 30) | |
384 | return -EINVAL; | |
385 | ||
386 | if (d->state != BT_OPEN && d->state != BT_CLOSED) | |
387 | return 0; | |
388 | ||
389 | s = rfcomm_session_get(src, dst); | |
390 | if (!s) { | |
63ce0900 | 391 | s = rfcomm_session_create(src, dst, d->sec_level, &err); |
1da177e4 LT |
392 | if (!s) |
393 | return err; | |
394 | } | |
395 | ||
396 | dlci = __dlci(!s->initiator, channel); | |
397 | ||
398 | /* Check if DLCI already exists */ | |
399 | if (rfcomm_dlc_get(s, dlci)) | |
400 | return -EBUSY; | |
401 | ||
402 | rfcomm_dlc_clear_state(d); | |
403 | ||
404 | d->dlci = dlci; | |
405 | d->addr = __addr(s->initiator, dlci); | |
406 | d->priority = 7; | |
407 | ||
77db1980 | 408 | d->state = BT_CONFIG; |
1da177e4 LT |
409 | rfcomm_dlc_link(s, d); |
410 | ||
77db1980 MH |
411 | d->out = 1; |
412 | ||
1da177e4 LT |
413 | d->mtu = s->mtu; |
414 | d->cfc = (s->cfc == RFCOMM_CFC_UNKNOWN) ? 0 : s->cfc; | |
415 | ||
77db1980 | 416 | if (s->state == BT_CONNECTED) { |
9f2c8a03 | 417 | if (rfcomm_check_security(d)) |
77db1980 | 418 | rfcomm_send_pn(s, 1, d); |
8c1b2355 MH |
419 | else |
420 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); | |
77db1980 MH |
421 | } |
422 | ||
1da177e4 | 423 | rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT); |
77db1980 | 424 | |
1da177e4 LT |
425 | return 0; |
426 | } | |
427 | ||
428 | int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) | |
429 | { | |
430 | int r; | |
431 | ||
432 | rfcomm_lock(); | |
433 | ||
434 | r = __rfcomm_dlc_open(d, src, dst, channel); | |
435 | ||
436 | rfcomm_unlock(); | |
437 | return r; | |
438 | } | |
439 | ||
440 | static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err) | |
441 | { | |
442 | struct rfcomm_session *s = d->session; | |
443 | if (!s) | |
444 | return 0; | |
445 | ||
446 | BT_DBG("dlc %p state %ld dlci %d err %d session %p", | |
447 | d, d->state, d->dlci, err, s); | |
448 | ||
449 | switch (d->state) { | |
1da177e4 | 450 | case BT_CONNECT: |
bb23c0ab MH |
451 | case BT_CONFIG: |
452 | if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { | |
453 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
534c92fd | 454 | rfcomm_schedule(); |
bb23c0ab MH |
455 | break; |
456 | } | |
457 | /* Fall through */ | |
458 | ||
459 | case BT_CONNECTED: | |
1da177e4 LT |
460 | d->state = BT_DISCONN; |
461 | if (skb_queue_empty(&d->tx_queue)) { | |
462 | rfcomm_send_disc(s, d->dlci); | |
463 | rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT); | |
464 | } else { | |
465 | rfcomm_queue_disc(d); | |
466 | rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT * 2); | |
467 | } | |
468 | break; | |
469 | ||
bb23c0ab | 470 | case BT_OPEN: |
8bf47941 | 471 | case BT_CONNECT2: |
bb23c0ab MH |
472 | if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { |
473 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
534c92fd | 474 | rfcomm_schedule(); |
bb23c0ab MH |
475 | break; |
476 | } | |
477 | /* Fall through */ | |
478 | ||
1da177e4 LT |
479 | default: |
480 | rfcomm_dlc_clear_timer(d); | |
481 | ||
482 | rfcomm_dlc_lock(d); | |
483 | d->state = BT_CLOSED; | |
1905f6c7 | 484 | d->state_change(d, err); |
4c8411f8 | 485 | rfcomm_dlc_unlock(d); |
1da177e4 LT |
486 | |
487 | skb_queue_purge(&d->tx_queue); | |
1da177e4 LT |
488 | rfcomm_dlc_unlink(d); |
489 | } | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | int rfcomm_dlc_close(struct rfcomm_dlc *d, int err) | |
495 | { | |
496 | int r; | |
497 | ||
498 | rfcomm_lock(); | |
499 | ||
500 | r = __rfcomm_dlc_close(d, err); | |
501 | ||
502 | rfcomm_unlock(); | |
503 | return r; | |
504 | } | |
505 | ||
506 | int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb) | |
507 | { | |
508 | int len = skb->len; | |
509 | ||
510 | if (d->state != BT_CONNECTED) | |
511 | return -ENOTCONN; | |
512 | ||
513 | BT_DBG("dlc %p mtu %d len %d", d, d->mtu, len); | |
514 | ||
515 | if (len > d->mtu) | |
516 | return -EINVAL; | |
517 | ||
518 | rfcomm_make_uih(skb, d->addr); | |
519 | skb_queue_tail(&d->tx_queue, skb); | |
520 | ||
521 | if (!test_bit(RFCOMM_TX_THROTTLED, &d->flags)) | |
534c92fd | 522 | rfcomm_schedule(); |
1da177e4 LT |
523 | return len; |
524 | } | |
525 | ||
b5606c2d | 526 | void __rfcomm_dlc_throttle(struct rfcomm_dlc *d) |
1da177e4 LT |
527 | { |
528 | BT_DBG("dlc %p state %ld", d, d->state); | |
529 | ||
530 | if (!d->cfc) { | |
531 | d->v24_sig |= RFCOMM_V24_FC; | |
532 | set_bit(RFCOMM_MSC_PENDING, &d->flags); | |
533 | } | |
534c92fd | 534 | rfcomm_schedule(); |
1da177e4 LT |
535 | } |
536 | ||
b5606c2d | 537 | void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d) |
1da177e4 LT |
538 | { |
539 | BT_DBG("dlc %p state %ld", d, d->state); | |
540 | ||
541 | if (!d->cfc) { | |
542 | d->v24_sig &= ~RFCOMM_V24_FC; | |
543 | set_bit(RFCOMM_MSC_PENDING, &d->flags); | |
544 | } | |
534c92fd | 545 | rfcomm_schedule(); |
1da177e4 LT |
546 | } |
547 | ||
8e87d142 | 548 | /* |
1da177e4 LT |
549 | Set/get modem status functions use _local_ status i.e. what we report |
550 | to the other side. | |
551 | Remote status is provided by dlc->modem_status() callback. | |
552 | */ | |
553 | int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig) | |
554 | { | |
8e87d142 | 555 | BT_DBG("dlc %p state %ld v24_sig 0x%x", |
1da177e4 LT |
556 | d, d->state, v24_sig); |
557 | ||
558 | if (test_bit(RFCOMM_RX_THROTTLED, &d->flags)) | |
559 | v24_sig |= RFCOMM_V24_FC; | |
560 | else | |
561 | v24_sig &= ~RFCOMM_V24_FC; | |
8e87d142 | 562 | |
1da177e4 LT |
563 | d->v24_sig = v24_sig; |
564 | ||
565 | if (!test_and_set_bit(RFCOMM_MSC_PENDING, &d->flags)) | |
534c92fd | 566 | rfcomm_schedule(); |
1da177e4 LT |
567 | |
568 | return 0; | |
569 | } | |
570 | ||
571 | int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig) | |
572 | { | |
8e87d142 | 573 | BT_DBG("dlc %p state %ld v24_sig 0x%x", |
1da177e4 LT |
574 | d, d->state, d->v24_sig); |
575 | ||
576 | *v24_sig = d->v24_sig; | |
577 | return 0; | |
578 | } | |
579 | ||
580 | /* ---- RFCOMM sessions ---- */ | |
581 | static struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state) | |
582 | { | |
25ea6db0 MH |
583 | struct rfcomm_session *s = kzalloc(sizeof(*s), GFP_KERNEL); |
584 | ||
1da177e4 LT |
585 | if (!s) |
586 | return NULL; | |
1da177e4 LT |
587 | |
588 | BT_DBG("session %p sock %p", s, sock); | |
589 | ||
9e726b17 LAD |
590 | setup_timer(&s->timer, rfcomm_session_timeout, (unsigned long) s); |
591 | ||
1da177e4 LT |
592 | INIT_LIST_HEAD(&s->dlcs); |
593 | s->state = state; | |
594 | s->sock = sock; | |
595 | ||
596 | s->mtu = RFCOMM_DEFAULT_MTU; | |
7c2660b0 | 597 | s->cfc = disable_cfc ? RFCOMM_CFC_DISABLED : RFCOMM_CFC_UNKNOWN; |
1da177e4 LT |
598 | |
599 | /* Do not increment module usage count for listening sessions. | |
600 | * Otherwise we won't be able to unload the module. */ | |
601 | if (state != BT_LISTEN) | |
602 | if (!try_module_get(THIS_MODULE)) { | |
603 | kfree(s); | |
604 | return NULL; | |
605 | } | |
606 | ||
607 | list_add(&s->list, &session_list); | |
608 | ||
609 | return s; | |
610 | } | |
611 | ||
612 | static void rfcomm_session_del(struct rfcomm_session *s) | |
613 | { | |
614 | int state = s->state; | |
615 | ||
616 | BT_DBG("session %p state %ld", s, s->state); | |
617 | ||
618 | list_del(&s->list); | |
619 | ||
620 | if (state == BT_CONNECTED) | |
621 | rfcomm_send_disc(s, 0); | |
622 | ||
9e726b17 | 623 | rfcomm_session_clear_timer(s); |
1da177e4 LT |
624 | sock_release(s->sock); |
625 | kfree(s); | |
626 | ||
627 | if (state != BT_LISTEN) | |
628 | module_put(THIS_MODULE); | |
629 | } | |
630 | ||
631 | static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst) | |
632 | { | |
633 | struct rfcomm_session *s; | |
634 | struct list_head *p, *n; | |
635 | struct bt_sock *sk; | |
636 | list_for_each_safe(p, n, &session_list) { | |
637 | s = list_entry(p, struct rfcomm_session, list); | |
8e87d142 | 638 | sk = bt_sk(s->sock->sk); |
1da177e4 LT |
639 | |
640 | if ((!bacmp(src, BDADDR_ANY) || !bacmp(&sk->src, src)) && | |
641 | !bacmp(&sk->dst, dst)) | |
642 | return s; | |
643 | } | |
644 | return NULL; | |
645 | } | |
646 | ||
647 | static void rfcomm_session_close(struct rfcomm_session *s, int err) | |
648 | { | |
649 | struct rfcomm_dlc *d; | |
650 | struct list_head *p, *n; | |
651 | ||
652 | BT_DBG("session %p state %ld err %d", s, s->state, err); | |
653 | ||
654 | rfcomm_session_hold(s); | |
655 | ||
656 | s->state = BT_CLOSED; | |
657 | ||
658 | /* Close all dlcs */ | |
659 | list_for_each_safe(p, n, &s->dlcs) { | |
660 | d = list_entry(p, struct rfcomm_dlc, list); | |
661 | d->state = BT_CLOSED; | |
662 | __rfcomm_dlc_close(d, err); | |
663 | } | |
664 | ||
9e726b17 | 665 | rfcomm_session_clear_timer(s); |
1da177e4 LT |
666 | rfcomm_session_put(s); |
667 | } | |
668 | ||
63ce0900 LAD |
669 | static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, |
670 | bdaddr_t *dst, | |
671 | u8 sec_level, | |
672 | int *err) | |
1da177e4 LT |
673 | { |
674 | struct rfcomm_session *s = NULL; | |
675 | struct sockaddr_l2 addr; | |
676 | struct socket *sock; | |
677 | struct sock *sk; | |
678 | ||
6ed93dc6 | 679 | BT_DBG("%pMR -> %pMR", src, dst); |
1da177e4 LT |
680 | |
681 | *err = rfcomm_l2sock_create(&sock); | |
682 | if (*err < 0) | |
683 | return NULL; | |
684 | ||
685 | bacpy(&addr.l2_bdaddr, src); | |
686 | addr.l2_family = AF_BLUETOOTH; | |
687 | addr.l2_psm = 0; | |
37e62f55 | 688 | addr.l2_cid = 0; |
48db9ca4 | 689 | *err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); |
1da177e4 LT |
690 | if (*err < 0) |
691 | goto failed; | |
692 | ||
693 | /* Set L2CAP options */ | |
694 | sk = sock->sk; | |
695 | lock_sock(sk); | |
0c1bc5c6 | 696 | l2cap_pi(sk)->chan->imtu = l2cap_mtu; |
47d1ec61 | 697 | l2cap_pi(sk)->chan->sec_level = sec_level; |
eae38eed | 698 | if (l2cap_ertm) |
0c1bc5c6 | 699 | l2cap_pi(sk)->chan->mode = L2CAP_MODE_ERTM; |
1da177e4 LT |
700 | release_sock(sk); |
701 | ||
702 | s = rfcomm_session_add(sock, BT_BOUND); | |
703 | if (!s) { | |
704 | *err = -ENOMEM; | |
705 | goto failed; | |
706 | } | |
707 | ||
1da177e4 LT |
708 | s->initiator = 1; |
709 | ||
710 | bacpy(&addr.l2_bdaddr, dst); | |
711 | addr.l2_family = AF_BLUETOOTH; | |
5bcb8094 | 712 | addr.l2_psm = __constant_cpu_to_le16(RFCOMM_PSM); |
37e62f55 | 713 | addr.l2_cid = 0; |
48db9ca4 | 714 | *err = kernel_connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK); |
b4c612a4 | 715 | if (*err == 0 || *err == -EINPROGRESS) |
1da177e4 LT |
716 | return s; |
717 | ||
718 | rfcomm_session_del(s); | |
719 | return NULL; | |
720 | ||
721 | failed: | |
722 | sock_release(sock); | |
723 | return NULL; | |
724 | } | |
725 | ||
726 | void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst) | |
727 | { | |
728 | struct sock *sk = s->sock->sk; | |
729 | if (src) | |
730 | bacpy(src, &bt_sk(sk)->src); | |
731 | if (dst) | |
732 | bacpy(dst, &bt_sk(sk)->dst); | |
733 | } | |
734 | ||
735 | /* ---- RFCOMM frame sending ---- */ | |
5436538f | 736 | static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len) |
1da177e4 | 737 | { |
1da177e4 LT |
738 | struct kvec iv = { data, len }; |
739 | struct msghdr msg; | |
740 | ||
5436538f | 741 | BT_DBG("session %p len %d", s, len); |
1da177e4 LT |
742 | |
743 | memset(&msg, 0, sizeof(msg)); | |
744 | ||
5436538f | 745 | return kernel_sendmsg(s->sock, &msg, &iv, 1, len); |
1da177e4 LT |
746 | } |
747 | ||
262038fc LAD |
748 | static int rfcomm_send_cmd(struct rfcomm_session *s, struct rfcomm_cmd *cmd) |
749 | { | |
750 | BT_DBG("%p cmd %u", s, cmd->ctrl); | |
751 | ||
5436538f | 752 | return rfcomm_send_frame(s, (void *) cmd, sizeof(*cmd)); |
262038fc LAD |
753 | } |
754 | ||
1da177e4 LT |
755 | static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci) |
756 | { | |
757 | struct rfcomm_cmd cmd; | |
758 | ||
759 | BT_DBG("%p dlci %d", s, dlci); | |
760 | ||
761 | cmd.addr = __addr(s->initiator, dlci); | |
762 | cmd.ctrl = __ctrl(RFCOMM_SABM, 1); | |
763 | cmd.len = __len8(0); | |
764 | cmd.fcs = __fcs2((u8 *) &cmd); | |
765 | ||
262038fc | 766 | return rfcomm_send_cmd(s, &cmd); |
1da177e4 LT |
767 | } |
768 | ||
769 | static int rfcomm_send_ua(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_UA, 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_disc(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_DISC, 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_queue_disc(struct rfcomm_dlc *d) | |
798 | { | |
799 | struct rfcomm_cmd *cmd; | |
800 | struct sk_buff *skb; | |
801 | ||
802 | BT_DBG("dlc %p dlci %d", d, d->dlci); | |
803 | ||
804 | skb = alloc_skb(sizeof(*cmd), GFP_KERNEL); | |
805 | if (!skb) | |
806 | return -ENOMEM; | |
807 | ||
808 | cmd = (void *) __skb_put(skb, sizeof(*cmd)); | |
809 | cmd->addr = d->addr; | |
810 | cmd->ctrl = __ctrl(RFCOMM_DISC, 1); | |
811 | cmd->len = __len8(0); | |
812 | cmd->fcs = __fcs2((u8 *) cmd); | |
813 | ||
814 | skb_queue_tail(&d->tx_queue, skb); | |
534c92fd | 815 | rfcomm_schedule(); |
1da177e4 LT |
816 | return 0; |
817 | } | |
818 | ||
819 | static int rfcomm_send_dm(struct rfcomm_session *s, u8 dlci) | |
820 | { | |
821 | struct rfcomm_cmd cmd; | |
822 | ||
823 | BT_DBG("%p dlci %d", s, dlci); | |
824 | ||
825 | cmd.addr = __addr(!s->initiator, dlci); | |
826 | cmd.ctrl = __ctrl(RFCOMM_DM, 1); | |
827 | cmd.len = __len8(0); | |
828 | cmd.fcs = __fcs2((u8 *) &cmd); | |
829 | ||
262038fc | 830 | return rfcomm_send_cmd(s, &cmd); |
1da177e4 LT |
831 | } |
832 | ||
833 | static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type) | |
834 | { | |
835 | struct rfcomm_hdr *hdr; | |
836 | struct rfcomm_mcc *mcc; | |
837 | u8 buf[16], *ptr = buf; | |
838 | ||
839 | BT_DBG("%p cr %d type %d", s, cr, type); | |
840 | ||
841 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
842 | hdr->addr = __addr(s->initiator, 0); | |
843 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
844 | hdr->len = __len8(sizeof(*mcc) + 1); | |
845 | ||
846 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
847 | mcc->type = __mcc_type(cr, RFCOMM_NSC); | |
848 | mcc->len = __len8(1); | |
849 | ||
850 | /* Type that we didn't like */ | |
851 | *ptr = __mcc_type(cr, type); ptr++; | |
852 | ||
853 | *ptr = __fcs(buf); ptr++; | |
854 | ||
5436538f | 855 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
856 | } |
857 | ||
858 | static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d) | |
859 | { | |
860 | struct rfcomm_hdr *hdr; | |
861 | struct rfcomm_mcc *mcc; | |
862 | struct rfcomm_pn *pn; | |
863 | u8 buf[16], *ptr = buf; | |
864 | ||
865 | BT_DBG("%p cr %d dlci %d mtu %d", s, cr, d->dlci, d->mtu); | |
866 | ||
867 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
868 | hdr->addr = __addr(s->initiator, 0); | |
869 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
870 | hdr->len = __len8(sizeof(*mcc) + sizeof(*pn)); | |
871 | ||
872 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
873 | mcc->type = __mcc_type(cr, RFCOMM_PN); | |
874 | mcc->len = __len8(sizeof(*pn)); | |
875 | ||
876 | pn = (void *) ptr; ptr += sizeof(*pn); | |
877 | pn->dlci = d->dlci; | |
878 | pn->priority = d->priority; | |
879 | pn->ack_timer = 0; | |
880 | pn->max_retrans = 0; | |
881 | ||
882 | if (s->cfc) { | |
883 | pn->flow_ctrl = cr ? 0xf0 : 0xe0; | |
884 | pn->credits = RFCOMM_DEFAULT_CREDITS; | |
885 | } else { | |
886 | pn->flow_ctrl = 0; | |
887 | pn->credits = 0; | |
888 | } | |
889 | ||
98bcd08b | 890 | if (cr && channel_mtu >= 0) |
b4324b5d | 891 | pn->mtu = cpu_to_le16(channel_mtu); |
98bcd08b | 892 | else |
b4324b5d | 893 | pn->mtu = cpu_to_le16(d->mtu); |
1da177e4 LT |
894 | |
895 | *ptr = __fcs(buf); ptr++; | |
896 | ||
5436538f | 897 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
898 | } |
899 | ||
3a5e903c S |
900 | int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci, |
901 | u8 bit_rate, u8 data_bits, u8 stop_bits, | |
8e87d142 | 902 | u8 parity, u8 flow_ctrl_settings, |
3a5e903c | 903 | u8 xon_char, u8 xoff_char, u16 param_mask) |
1da177e4 LT |
904 | { |
905 | struct rfcomm_hdr *hdr; | |
906 | struct rfcomm_mcc *mcc; | |
907 | struct rfcomm_rpn *rpn; | |
908 | u8 buf[16], *ptr = buf; | |
909 | ||
910 | BT_DBG("%p cr %d dlci %d bit_r 0x%x data_b 0x%x stop_b 0x%x parity 0x%x" | |
8e87d142 YH |
911 | " flwc_s 0x%x xon_c 0x%x xoff_c 0x%x p_mask 0x%x", |
912 | s, cr, dlci, bit_rate, data_bits, stop_bits, parity, | |
3a5e903c | 913 | flow_ctrl_settings, xon_char, xoff_char, param_mask); |
1da177e4 LT |
914 | |
915 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
916 | hdr->addr = __addr(s->initiator, 0); | |
917 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
918 | hdr->len = __len8(sizeof(*mcc) + sizeof(*rpn)); | |
919 | ||
920 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
921 | mcc->type = __mcc_type(cr, RFCOMM_RPN); | |
922 | mcc->len = __len8(sizeof(*rpn)); | |
923 | ||
924 | rpn = (void *) ptr; ptr += sizeof(*rpn); | |
925 | rpn->dlci = __addr(1, dlci); | |
926 | rpn->bit_rate = bit_rate; | |
927 | rpn->line_settings = __rpn_line_settings(data_bits, stop_bits, parity); | |
928 | rpn->flow_ctrl = flow_ctrl_settings; | |
929 | rpn->xon_char = xon_char; | |
930 | rpn->xoff_char = xoff_char; | |
e8db8c99 | 931 | rpn->param_mask = cpu_to_le16(param_mask); |
1da177e4 LT |
932 | |
933 | *ptr = __fcs(buf); ptr++; | |
934 | ||
5436538f | 935 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
936 | } |
937 | ||
938 | static int rfcomm_send_rls(struct rfcomm_session *s, int cr, u8 dlci, u8 status) | |
939 | { | |
940 | struct rfcomm_hdr *hdr; | |
941 | struct rfcomm_mcc *mcc; | |
942 | struct rfcomm_rls *rls; | |
943 | u8 buf[16], *ptr = buf; | |
944 | ||
945 | BT_DBG("%p cr %d status 0x%x", s, cr, status); | |
946 | ||
947 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
948 | hdr->addr = __addr(s->initiator, 0); | |
949 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
950 | hdr->len = __len8(sizeof(*mcc) + sizeof(*rls)); | |
951 | ||
952 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
953 | mcc->type = __mcc_type(cr, RFCOMM_RLS); | |
954 | mcc->len = __len8(sizeof(*rls)); | |
955 | ||
956 | rls = (void *) ptr; ptr += sizeof(*rls); | |
957 | rls->dlci = __addr(1, dlci); | |
958 | rls->status = status; | |
959 | ||
960 | *ptr = __fcs(buf); ptr++; | |
961 | ||
5436538f | 962 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
963 | } |
964 | ||
965 | static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig) | |
966 | { | |
967 | struct rfcomm_hdr *hdr; | |
968 | struct rfcomm_mcc *mcc; | |
969 | struct rfcomm_msc *msc; | |
970 | u8 buf[16], *ptr = buf; | |
971 | ||
972 | BT_DBG("%p cr %d v24 0x%x", s, cr, v24_sig); | |
973 | ||
974 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
975 | hdr->addr = __addr(s->initiator, 0); | |
976 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
977 | hdr->len = __len8(sizeof(*mcc) + sizeof(*msc)); | |
978 | ||
979 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
980 | mcc->type = __mcc_type(cr, RFCOMM_MSC); | |
981 | mcc->len = __len8(sizeof(*msc)); | |
982 | ||
983 | msc = (void *) ptr; ptr += sizeof(*msc); | |
984 | msc->dlci = __addr(1, dlci); | |
985 | msc->v24_sig = v24_sig | 0x01; | |
986 | ||
987 | *ptr = __fcs(buf); ptr++; | |
988 | ||
5436538f | 989 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
990 | } |
991 | ||
992 | static int rfcomm_send_fcoff(struct rfcomm_session *s, int cr) | |
993 | { | |
994 | struct rfcomm_hdr *hdr; | |
995 | struct rfcomm_mcc *mcc; | |
996 | u8 buf[16], *ptr = buf; | |
997 | ||
998 | BT_DBG("%p cr %d", s, cr); | |
999 | ||
1000 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1001 | hdr->addr = __addr(s->initiator, 0); | |
1002 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1003 | hdr->len = __len8(sizeof(*mcc)); | |
1004 | ||
1005 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
1006 | mcc->type = __mcc_type(cr, RFCOMM_FCOFF); | |
1007 | mcc->len = __len8(0); | |
1008 | ||
1009 | *ptr = __fcs(buf); ptr++; | |
1010 | ||
5436538f | 1011 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
1012 | } |
1013 | ||
1014 | static int rfcomm_send_fcon(struct rfcomm_session *s, int cr) | |
1015 | { | |
1016 | struct rfcomm_hdr *hdr; | |
1017 | struct rfcomm_mcc *mcc; | |
1018 | u8 buf[16], *ptr = buf; | |
1019 | ||
1020 | BT_DBG("%p cr %d", s, cr); | |
1021 | ||
1022 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1023 | hdr->addr = __addr(s->initiator, 0); | |
1024 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1025 | hdr->len = __len8(sizeof(*mcc)); | |
1026 | ||
1027 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
1028 | mcc->type = __mcc_type(cr, RFCOMM_FCON); | |
1029 | mcc->len = __len8(0); | |
1030 | ||
1031 | *ptr = __fcs(buf); ptr++; | |
1032 | ||
5436538f | 1033 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
1034 | } |
1035 | ||
1036 | static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len) | |
1037 | { | |
1038 | struct socket *sock = s->sock; | |
1039 | struct kvec iv[3]; | |
1040 | struct msghdr msg; | |
1041 | unsigned char hdr[5], crc[1]; | |
1042 | ||
1043 | if (len > 125) | |
1044 | return -EINVAL; | |
1045 | ||
1046 | BT_DBG("%p cr %d", s, cr); | |
1047 | ||
1048 | hdr[0] = __addr(s->initiator, 0); | |
1049 | hdr[1] = __ctrl(RFCOMM_UIH, 0); | |
1050 | hdr[2] = 0x01 | ((len + 2) << 1); | |
1051 | hdr[3] = 0x01 | ((cr & 0x01) << 1) | (RFCOMM_TEST << 2); | |
1052 | hdr[4] = 0x01 | (len << 1); | |
1053 | ||
1054 | crc[0] = __fcs(hdr); | |
1055 | ||
1056 | iv[0].iov_base = hdr; | |
1057 | iv[0].iov_len = 5; | |
1058 | iv[1].iov_base = pattern; | |
1059 | iv[1].iov_len = len; | |
1060 | iv[2].iov_base = crc; | |
1061 | iv[2].iov_len = 1; | |
1062 | ||
1063 | memset(&msg, 0, sizeof(msg)); | |
1064 | ||
1065 | return kernel_sendmsg(sock, &msg, iv, 3, 6 + len); | |
1066 | } | |
1067 | ||
1068 | static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits) | |
1069 | { | |
1070 | struct rfcomm_hdr *hdr; | |
1071 | u8 buf[16], *ptr = buf; | |
1072 | ||
1073 | BT_DBG("%p addr %d credits %d", s, addr, credits); | |
1074 | ||
1075 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1076 | hdr->addr = addr; | |
1077 | hdr->ctrl = __ctrl(RFCOMM_UIH, 1); | |
1078 | hdr->len = __len8(0); | |
1079 | ||
1080 | *ptr = credits; ptr++; | |
1081 | ||
1082 | *ptr = __fcs(buf); ptr++; | |
1083 | ||
5436538f | 1084 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
1085 | } |
1086 | ||
1087 | static void rfcomm_make_uih(struct sk_buff *skb, u8 addr) | |
1088 | { | |
1089 | struct rfcomm_hdr *hdr; | |
1090 | int len = skb->len; | |
1091 | u8 *crc; | |
1092 | ||
1093 | if (len > 127) { | |
1094 | hdr = (void *) skb_push(skb, 4); | |
b4324b5d | 1095 | put_unaligned(cpu_to_le16(__len16(len)), (__le16 *) &hdr->len); |
1da177e4 LT |
1096 | } else { |
1097 | hdr = (void *) skb_push(skb, 3); | |
1098 | hdr->len = __len8(len); | |
1099 | } | |
1100 | hdr->addr = addr; | |
1101 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1102 | ||
1103 | crc = skb_put(skb, 1); | |
1104 | *crc = __fcs((void *) hdr); | |
1105 | } | |
1106 | ||
1107 | /* ---- RFCOMM frame reception ---- */ | |
1108 | static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci) | |
1109 | { | |
1110 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1111 | ||
1112 | if (dlci) { | |
1113 | /* Data channel */ | |
1114 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1115 | if (!d) { | |
1116 | rfcomm_send_dm(s, dlci); | |
1117 | return 0; | |
1118 | } | |
1119 | ||
1120 | switch (d->state) { | |
1121 | case BT_CONNECT: | |
1122 | rfcomm_dlc_clear_timer(d); | |
1123 | ||
1124 | rfcomm_dlc_lock(d); | |
1125 | d->state = BT_CONNECTED; | |
1126 | d->state_change(d, 0); | |
1127 | rfcomm_dlc_unlock(d); | |
1128 | ||
1129 | rfcomm_send_msc(s, 1, dlci, d->v24_sig); | |
1130 | break; | |
1131 | ||
1132 | case BT_DISCONN: | |
1133 | d->state = BT_CLOSED; | |
1134 | __rfcomm_dlc_close(d, 0); | |
9cf5b0ea MH |
1135 | |
1136 | if (list_empty(&s->dlcs)) { | |
1137 | s->state = BT_DISCONN; | |
1138 | rfcomm_send_disc(s, 0); | |
79e65478 | 1139 | rfcomm_session_clear_timer(s); |
9cf5b0ea MH |
1140 | } |
1141 | ||
1da177e4 LT |
1142 | break; |
1143 | } | |
1144 | } else { | |
1145 | /* Control channel */ | |
1146 | switch (s->state) { | |
1147 | case BT_CONNECT: | |
1148 | s->state = BT_CONNECTED; | |
1149 | rfcomm_process_connect(s); | |
1150 | break; | |
9cf5b0ea MH |
1151 | |
1152 | case BT_DISCONN: | |
cf33e77b OP |
1153 | /* rfcomm_session_put is called later so don't do |
1154 | * anything here otherwise we will mess up the session | |
1155 | * reference counter: | |
1156 | * | |
1157 | * (a) when we are the initiator dlc_unlink will drive | |
1158 | * the reference counter to 0 (there is no initial put | |
1159 | * after session_add) | |
1160 | * | |
1161 | * (b) when we are not the initiator rfcomm_rx_process | |
1162 | * will explicitly call put to balance the initial hold | |
1163 | * done after session add. | |
1164 | */ | |
9cf5b0ea | 1165 | break; |
1da177e4 LT |
1166 | } |
1167 | } | |
1168 | return 0; | |
1169 | } | |
1170 | ||
1171 | static int rfcomm_recv_dm(struct rfcomm_session *s, u8 dlci) | |
1172 | { | |
1173 | int err = 0; | |
1174 | ||
1175 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1176 | ||
1177 | if (dlci) { | |
1178 | /* Data DLC */ | |
1179 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1180 | if (d) { | |
1181 | if (d->state == BT_CONNECT || d->state == BT_CONFIG) | |
1182 | err = ECONNREFUSED; | |
1183 | else | |
1184 | err = ECONNRESET; | |
1185 | ||
1186 | d->state = BT_CLOSED; | |
1187 | __rfcomm_dlc_close(d, err); | |
1188 | } | |
1189 | } else { | |
1190 | if (s->state == BT_CONNECT) | |
1191 | err = ECONNREFUSED; | |
1192 | else | |
1193 | err = ECONNRESET; | |
1194 | ||
1195 | s->state = BT_CLOSED; | |
1196 | rfcomm_session_close(s, err); | |
1197 | } | |
1198 | return 0; | |
1199 | } | |
1200 | ||
1201 | static int rfcomm_recv_disc(struct rfcomm_session *s, u8 dlci) | |
1202 | { | |
1203 | int err = 0; | |
1204 | ||
1205 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1206 | ||
1207 | if (dlci) { | |
1208 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1209 | if (d) { | |
1210 | rfcomm_send_ua(s, dlci); | |
1211 | ||
1212 | if (d->state == BT_CONNECT || d->state == BT_CONFIG) | |
1213 | err = ECONNREFUSED; | |
1214 | else | |
1215 | err = ECONNRESET; | |
1216 | ||
1217 | d->state = BT_CLOSED; | |
1218 | __rfcomm_dlc_close(d, err); | |
8e87d142 | 1219 | } else |
1da177e4 | 1220 | rfcomm_send_dm(s, dlci); |
8e87d142 | 1221 | |
1da177e4 LT |
1222 | } else { |
1223 | rfcomm_send_ua(s, 0); | |
1224 | ||
1225 | if (s->state == BT_CONNECT) | |
1226 | err = ECONNREFUSED; | |
1227 | else | |
1228 | err = ECONNRESET; | |
1229 | ||
1230 | s->state = BT_CLOSED; | |
1231 | rfcomm_session_close(s, err); | |
1232 | } | |
1233 | ||
1234 | return 0; | |
1235 | } | |
1236 | ||
bb23c0ab | 1237 | void rfcomm_dlc_accept(struct rfcomm_dlc *d) |
1da177e4 | 1238 | { |
300b9397 | 1239 | struct sock *sk = d->session->sock->sk; |
8c1d787b | 1240 | struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; |
300b9397 | 1241 | |
1da177e4 LT |
1242 | BT_DBG("dlc %p", d); |
1243 | ||
1244 | rfcomm_send_ua(d->session, d->dlci); | |
1245 | ||
e2139b32 JH |
1246 | rfcomm_dlc_clear_timer(d); |
1247 | ||
1da177e4 LT |
1248 | rfcomm_dlc_lock(d); |
1249 | d->state = BT_CONNECTED; | |
1250 | d->state_change(d, 0); | |
1251 | rfcomm_dlc_unlock(d); | |
1252 | ||
9f2c8a03 | 1253 | if (d->role_switch) |
8c1d787b | 1254 | hci_conn_switch_role(conn->hcon, 0x00); |
300b9397 | 1255 | |
1da177e4 LT |
1256 | rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); |
1257 | } | |
1258 | ||
bb23c0ab MH |
1259 | static void rfcomm_check_accept(struct rfcomm_dlc *d) |
1260 | { | |
9f2c8a03 | 1261 | if (rfcomm_check_security(d)) { |
bb23c0ab MH |
1262 | if (d->defer_setup) { |
1263 | set_bit(RFCOMM_DEFER_SETUP, &d->flags); | |
1264 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8bf47941 MH |
1265 | |
1266 | rfcomm_dlc_lock(d); | |
1267 | d->state = BT_CONNECT2; | |
1268 | d->state_change(d, 0); | |
1269 | rfcomm_dlc_unlock(d); | |
bb23c0ab MH |
1270 | } else |
1271 | rfcomm_dlc_accept(d); | |
8c1b2355 MH |
1272 | } else { |
1273 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); | |
1274 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
bb23c0ab MH |
1275 | } |
1276 | } | |
1277 | ||
1da177e4 LT |
1278 | static int rfcomm_recv_sabm(struct rfcomm_session *s, u8 dlci) |
1279 | { | |
1280 | struct rfcomm_dlc *d; | |
1281 | u8 channel; | |
1282 | ||
1283 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1284 | ||
1285 | if (!dlci) { | |
1286 | rfcomm_send_ua(s, 0); | |
1287 | ||
1288 | if (s->state == BT_OPEN) { | |
1289 | s->state = BT_CONNECTED; | |
1290 | rfcomm_process_connect(s); | |
1291 | } | |
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | /* Check if DLC exists */ | |
1296 | d = rfcomm_dlc_get(s, dlci); | |
1297 | if (d) { | |
1298 | if (d->state == BT_OPEN) { | |
1299 | /* DLC was previously opened by PN request */ | |
bb23c0ab | 1300 | rfcomm_check_accept(d); |
1da177e4 LT |
1301 | } |
1302 | return 0; | |
1303 | } | |
1304 | ||
1305 | /* Notify socket layer about incoming connection */ | |
1306 | channel = __srv_channel(dlci); | |
1307 | if (rfcomm_connect_ind(s, channel, &d)) { | |
1308 | d->dlci = dlci; | |
1309 | d->addr = __addr(s->initiator, dlci); | |
1310 | rfcomm_dlc_link(s, d); | |
1311 | ||
bb23c0ab | 1312 | rfcomm_check_accept(d); |
1da177e4 LT |
1313 | } else { |
1314 | rfcomm_send_dm(s, dlci); | |
1315 | } | |
1316 | ||
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | static int rfcomm_apply_pn(struct rfcomm_dlc *d, int cr, struct rfcomm_pn *pn) | |
1321 | { | |
1322 | struct rfcomm_session *s = d->session; | |
1323 | ||
8e87d142 | 1324 | BT_DBG("dlc %p state %ld dlci %d mtu %d fc 0x%x credits %d", |
1da177e4 LT |
1325 | d, d->state, d->dlci, pn->mtu, pn->flow_ctrl, pn->credits); |
1326 | ||
7c2660b0 MH |
1327 | if ((pn->flow_ctrl == 0xf0 && s->cfc != RFCOMM_CFC_DISABLED) || |
1328 | pn->flow_ctrl == 0xe0) { | |
1329 | d->cfc = RFCOMM_CFC_ENABLED; | |
1da177e4 LT |
1330 | d->tx_credits = pn->credits; |
1331 | } else { | |
7c2660b0 | 1332 | d->cfc = RFCOMM_CFC_DISABLED; |
1da177e4 LT |
1333 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); |
1334 | } | |
1335 | ||
7c2660b0 MH |
1336 | if (s->cfc == RFCOMM_CFC_UNKNOWN) |
1337 | s->cfc = d->cfc; | |
1338 | ||
1da177e4 LT |
1339 | d->priority = pn->priority; |
1340 | ||
b4324b5d | 1341 | d->mtu = __le16_to_cpu(pn->mtu); |
98bcd08b MH |
1342 | |
1343 | if (cr && d->mtu > s->mtu) | |
1344 | d->mtu = s->mtu; | |
1da177e4 LT |
1345 | |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | static int rfcomm_recv_pn(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1350 | { | |
1351 | struct rfcomm_pn *pn = (void *) skb->data; | |
1352 | struct rfcomm_dlc *d; | |
1353 | u8 dlci = pn->dlci; | |
1354 | ||
1355 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1356 | ||
1357 | if (!dlci) | |
1358 | return 0; | |
1359 | ||
1360 | d = rfcomm_dlc_get(s, dlci); | |
1361 | if (d) { | |
1362 | if (cr) { | |
1363 | /* PN request */ | |
1364 | rfcomm_apply_pn(d, cr, pn); | |
1365 | rfcomm_send_pn(s, 0, d); | |
1366 | } else { | |
1367 | /* PN response */ | |
1368 | switch (d->state) { | |
1369 | case BT_CONFIG: | |
1370 | rfcomm_apply_pn(d, cr, pn); | |
1371 | ||
1372 | d->state = BT_CONNECT; | |
1373 | rfcomm_send_sabm(s, d->dlci); | |
1374 | break; | |
1375 | } | |
1376 | } | |
1377 | } else { | |
1378 | u8 channel = __srv_channel(dlci); | |
1379 | ||
1380 | if (!cr) | |
1381 | return 0; | |
1382 | ||
1383 | /* PN request for non existing DLC. | |
1384 | * Assume incoming connection. */ | |
1385 | if (rfcomm_connect_ind(s, channel, &d)) { | |
1386 | d->dlci = dlci; | |
1387 | d->addr = __addr(s->initiator, dlci); | |
1388 | rfcomm_dlc_link(s, d); | |
1389 | ||
1390 | rfcomm_apply_pn(d, cr, pn); | |
1391 | ||
1392 | d->state = BT_OPEN; | |
1393 | rfcomm_send_pn(s, 0, d); | |
1394 | } else { | |
1395 | rfcomm_send_dm(s, dlci); | |
1396 | } | |
1397 | } | |
1398 | return 0; | |
1399 | } | |
1400 | ||
1401 | static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_buff *skb) | |
1402 | { | |
1403 | struct rfcomm_rpn *rpn = (void *) skb->data; | |
1404 | u8 dlci = __get_dlci(rpn->dlci); | |
1405 | ||
1406 | u8 bit_rate = 0; | |
1407 | u8 data_bits = 0; | |
1408 | u8 stop_bits = 0; | |
1409 | u8 parity = 0; | |
1410 | u8 flow_ctrl = 0; | |
1411 | u8 xon_char = 0; | |
1412 | u8 xoff_char = 0; | |
1413 | u16 rpn_mask = RFCOMM_RPN_PM_ALL; | |
3a5e903c S |
1414 | |
1415 | 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", | |
1416 | dlci, cr, len, rpn->bit_rate, rpn->line_settings, rpn->flow_ctrl, | |
1417 | rpn->xon_char, rpn->xoff_char, rpn->param_mask); | |
1418 | ||
1419 | if (!cr) | |
1da177e4 | 1420 | return 0; |
3a5e903c | 1421 | |
1da177e4 | 1422 | if (len == 1) { |
08601469 YK |
1423 | /* This is a request, return default (according to ETSI TS 07.10) settings */ |
1424 | bit_rate = RFCOMM_RPN_BR_9600; | |
1da177e4 LT |
1425 | data_bits = RFCOMM_RPN_DATA_8; |
1426 | stop_bits = RFCOMM_RPN_STOP_1; | |
1427 | parity = RFCOMM_RPN_PARITY_NONE; | |
1428 | flow_ctrl = RFCOMM_RPN_FLOW_NONE; | |
1429 | xon_char = RFCOMM_RPN_XON_CHAR; | |
1430 | xoff_char = RFCOMM_RPN_XOFF_CHAR; | |
1da177e4 LT |
1431 | goto rpn_out; |
1432 | } | |
3a5e903c S |
1433 | |
1434 | /* Check for sane values, ignore/accept bit_rate, 8 bits, 1 stop bit, | |
1435 | * no parity, no flow control lines, normal XON/XOFF chars */ | |
1436 | ||
e8db8c99 | 1437 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_BITRATE)) { |
1da177e4 | 1438 | bit_rate = rpn->bit_rate; |
08601469 | 1439 | if (bit_rate > RFCOMM_RPN_BR_230400) { |
1da177e4 | 1440 | BT_DBG("RPN bit rate mismatch 0x%x", bit_rate); |
08601469 | 1441 | bit_rate = RFCOMM_RPN_BR_9600; |
1da177e4 LT |
1442 | rpn_mask ^= RFCOMM_RPN_PM_BITRATE; |
1443 | } | |
1444 | } | |
3a5e903c | 1445 | |
e8db8c99 | 1446 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_DATA)) { |
1da177e4 LT |
1447 | data_bits = __get_rpn_data_bits(rpn->line_settings); |
1448 | if (data_bits != RFCOMM_RPN_DATA_8) { | |
1449 | BT_DBG("RPN data bits mismatch 0x%x", data_bits); | |
1450 | data_bits = RFCOMM_RPN_DATA_8; | |
1451 | rpn_mask ^= RFCOMM_RPN_PM_DATA; | |
1452 | } | |
1453 | } | |
3a5e903c | 1454 | |
e8db8c99 | 1455 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_STOP)) { |
1da177e4 LT |
1456 | stop_bits = __get_rpn_stop_bits(rpn->line_settings); |
1457 | if (stop_bits != RFCOMM_RPN_STOP_1) { | |
1458 | BT_DBG("RPN stop bits mismatch 0x%x", stop_bits); | |
1459 | stop_bits = RFCOMM_RPN_STOP_1; | |
1460 | rpn_mask ^= RFCOMM_RPN_PM_STOP; | |
1461 | } | |
1462 | } | |
3a5e903c | 1463 | |
e8db8c99 | 1464 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_PARITY)) { |
1da177e4 LT |
1465 | parity = __get_rpn_parity(rpn->line_settings); |
1466 | if (parity != RFCOMM_RPN_PARITY_NONE) { | |
1467 | BT_DBG("RPN parity mismatch 0x%x", parity); | |
1468 | parity = RFCOMM_RPN_PARITY_NONE; | |
1469 | rpn_mask ^= RFCOMM_RPN_PM_PARITY; | |
1470 | } | |
1471 | } | |
3a5e903c | 1472 | |
e8db8c99 | 1473 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_FLOW)) { |
1da177e4 LT |
1474 | flow_ctrl = rpn->flow_ctrl; |
1475 | if (flow_ctrl != RFCOMM_RPN_FLOW_NONE) { | |
1476 | BT_DBG("RPN flow ctrl mismatch 0x%x", flow_ctrl); | |
1477 | flow_ctrl = RFCOMM_RPN_FLOW_NONE; | |
1478 | rpn_mask ^= RFCOMM_RPN_PM_FLOW; | |
1479 | } | |
1480 | } | |
3a5e903c | 1481 | |
e8db8c99 | 1482 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XON)) { |
1da177e4 LT |
1483 | xon_char = rpn->xon_char; |
1484 | if (xon_char != RFCOMM_RPN_XON_CHAR) { | |
1485 | BT_DBG("RPN XON char mismatch 0x%x", xon_char); | |
1486 | xon_char = RFCOMM_RPN_XON_CHAR; | |
1487 | rpn_mask ^= RFCOMM_RPN_PM_XON; | |
1488 | } | |
1489 | } | |
3a5e903c | 1490 | |
e8db8c99 | 1491 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XOFF)) { |
1da177e4 LT |
1492 | xoff_char = rpn->xoff_char; |
1493 | if (xoff_char != RFCOMM_RPN_XOFF_CHAR) { | |
1494 | BT_DBG("RPN XOFF char mismatch 0x%x", xoff_char); | |
1495 | xoff_char = RFCOMM_RPN_XOFF_CHAR; | |
1496 | rpn_mask ^= RFCOMM_RPN_PM_XOFF; | |
1497 | } | |
1498 | } | |
1499 | ||
1500 | rpn_out: | |
3a5e903c S |
1501 | rfcomm_send_rpn(s, 0, dlci, bit_rate, data_bits, stop_bits, |
1502 | parity, flow_ctrl, xon_char, xoff_char, rpn_mask); | |
1da177e4 LT |
1503 | |
1504 | return 0; | |
1505 | } | |
1506 | ||
1507 | static int rfcomm_recv_rls(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1508 | { | |
1509 | struct rfcomm_rls *rls = (void *) skb->data; | |
1510 | u8 dlci = __get_dlci(rls->dlci); | |
1511 | ||
1512 | BT_DBG("dlci %d cr %d status 0x%x", dlci, cr, rls->status); | |
3a5e903c | 1513 | |
1da177e4 LT |
1514 | if (!cr) |
1515 | return 0; | |
1516 | ||
3a5e903c S |
1517 | /* We should probably do something with this information here. But |
1518 | * for now it's sufficient just to reply -- Bluetooth 1.1 says it's | |
1519 | * mandatory to recognise and respond to RLS */ | |
1da177e4 LT |
1520 | |
1521 | rfcomm_send_rls(s, 0, dlci, rls->status); | |
1522 | ||
1523 | return 0; | |
1524 | } | |
1525 | ||
1526 | static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1527 | { | |
1528 | struct rfcomm_msc *msc = (void *) skb->data; | |
1529 | struct rfcomm_dlc *d; | |
1530 | u8 dlci = __get_dlci(msc->dlci); | |
1531 | ||
1532 | BT_DBG("dlci %d cr %d v24 0x%x", dlci, cr, msc->v24_sig); | |
1533 | ||
1534 | d = rfcomm_dlc_get(s, dlci); | |
3a5e903c | 1535 | if (!d) |
1da177e4 LT |
1536 | return 0; |
1537 | ||
1538 | if (cr) { | |
1539 | if (msc->v24_sig & RFCOMM_V24_FC && !d->cfc) | |
1540 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1541 | else | |
1542 | clear_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
3a5e903c | 1543 | |
1da177e4 | 1544 | rfcomm_dlc_lock(d); |
8b6b3da7 MH |
1545 | |
1546 | d->remote_v24_sig = msc->v24_sig; | |
1547 | ||
1da177e4 LT |
1548 | if (d->modem_status) |
1549 | d->modem_status(d, msc->v24_sig); | |
8b6b3da7 | 1550 | |
1da177e4 | 1551 | rfcomm_dlc_unlock(d); |
8e87d142 | 1552 | |
1da177e4 LT |
1553 | rfcomm_send_msc(s, 0, dlci, msc->v24_sig); |
1554 | ||
1555 | d->mscex |= RFCOMM_MSCEX_RX; | |
3a5e903c | 1556 | } else |
1da177e4 LT |
1557 | d->mscex |= RFCOMM_MSCEX_TX; |
1558 | ||
1559 | return 0; | |
1560 | } | |
1561 | ||
1562 | static int rfcomm_recv_mcc(struct rfcomm_session *s, struct sk_buff *skb) | |
1563 | { | |
1564 | struct rfcomm_mcc *mcc = (void *) skb->data; | |
1565 | u8 type, cr, len; | |
1566 | ||
1567 | cr = __test_cr(mcc->type); | |
1568 | type = __get_mcc_type(mcc->type); | |
1569 | len = __get_mcc_len(mcc->len); | |
1570 | ||
1571 | BT_DBG("%p type 0x%x cr %d", s, type, cr); | |
1572 | ||
1573 | skb_pull(skb, 2); | |
1574 | ||
1575 | switch (type) { | |
1576 | case RFCOMM_PN: | |
1577 | rfcomm_recv_pn(s, cr, skb); | |
1578 | break; | |
1579 | ||
1580 | case RFCOMM_RPN: | |
1581 | rfcomm_recv_rpn(s, cr, len, skb); | |
1582 | break; | |
1583 | ||
1584 | case RFCOMM_RLS: | |
1585 | rfcomm_recv_rls(s, cr, skb); | |
1586 | break; | |
1587 | ||
1588 | case RFCOMM_MSC: | |
1589 | rfcomm_recv_msc(s, cr, skb); | |
1590 | break; | |
1591 | ||
1592 | case RFCOMM_FCOFF: | |
1593 | if (cr) { | |
1594 | set_bit(RFCOMM_TX_THROTTLED, &s->flags); | |
1595 | rfcomm_send_fcoff(s, 0); | |
1596 | } | |
1597 | break; | |
1598 | ||
1599 | case RFCOMM_FCON: | |
1600 | if (cr) { | |
1601 | clear_bit(RFCOMM_TX_THROTTLED, &s->flags); | |
1602 | rfcomm_send_fcon(s, 0); | |
1603 | } | |
1604 | break; | |
1605 | ||
1606 | case RFCOMM_TEST: | |
1607 | if (cr) | |
1608 | rfcomm_send_test(s, 0, skb->data, skb->len); | |
1609 | break; | |
1610 | ||
1611 | case RFCOMM_NSC: | |
1612 | break; | |
1613 | ||
1614 | default: | |
1615 | BT_ERR("Unknown control type 0x%02x", type); | |
1616 | rfcomm_send_nsc(s, cr, type); | |
1617 | break; | |
1618 | } | |
1619 | return 0; | |
1620 | } | |
1621 | ||
1622 | static int rfcomm_recv_data(struct rfcomm_session *s, u8 dlci, int pf, struct sk_buff *skb) | |
1623 | { | |
1624 | struct rfcomm_dlc *d; | |
1625 | ||
1626 | BT_DBG("session %p state %ld dlci %d pf %d", s, s->state, dlci, pf); | |
1627 | ||
1628 | d = rfcomm_dlc_get(s, dlci); | |
1629 | if (!d) { | |
1630 | rfcomm_send_dm(s, dlci); | |
1631 | goto drop; | |
1632 | } | |
1633 | ||
1634 | if (pf && d->cfc) { | |
1635 | u8 credits = *(u8 *) skb->data; skb_pull(skb, 1); | |
1636 | ||
1637 | d->tx_credits += credits; | |
1638 | if (d->tx_credits) | |
1639 | clear_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1640 | } | |
1641 | ||
1642 | if (skb->len && d->state == BT_CONNECTED) { | |
1643 | rfcomm_dlc_lock(d); | |
1644 | d->rx_credits--; | |
1645 | d->data_ready(d, skb); | |
1646 | rfcomm_dlc_unlock(d); | |
1647 | return 0; | |
1648 | } | |
1649 | ||
1650 | drop: | |
1651 | kfree_skb(skb); | |
1652 | return 0; | |
1653 | } | |
1654 | ||
1655 | static int rfcomm_recv_frame(struct rfcomm_session *s, struct sk_buff *skb) | |
1656 | { | |
1657 | struct rfcomm_hdr *hdr = (void *) skb->data; | |
1658 | u8 type, dlci, fcs; | |
1659 | ||
1660 | dlci = __get_dlci(hdr->addr); | |
1661 | type = __get_type(hdr->ctrl); | |
1662 | ||
1663 | /* Trim FCS */ | |
1664 | skb->len--; skb->tail--; | |
27a884dc | 1665 | fcs = *(u8 *)skb_tail_pointer(skb); |
1da177e4 LT |
1666 | |
1667 | if (__check_fcs(skb->data, type, fcs)) { | |
1668 | BT_ERR("bad checksum in packet"); | |
1669 | kfree_skb(skb); | |
1670 | return -EILSEQ; | |
1671 | } | |
1672 | ||
1673 | if (__test_ea(hdr->len)) | |
1674 | skb_pull(skb, 3); | |
1675 | else | |
1676 | skb_pull(skb, 4); | |
1677 | ||
1678 | switch (type) { | |
1679 | case RFCOMM_SABM: | |
1680 | if (__test_pf(hdr->ctrl)) | |
1681 | rfcomm_recv_sabm(s, dlci); | |
1682 | break; | |
1683 | ||
1684 | case RFCOMM_DISC: | |
1685 | if (__test_pf(hdr->ctrl)) | |
1686 | rfcomm_recv_disc(s, dlci); | |
1687 | break; | |
1688 | ||
1689 | case RFCOMM_UA: | |
1690 | if (__test_pf(hdr->ctrl)) | |
1691 | rfcomm_recv_ua(s, dlci); | |
1692 | break; | |
1693 | ||
1694 | case RFCOMM_DM: | |
1695 | rfcomm_recv_dm(s, dlci); | |
1696 | break; | |
1697 | ||
1698 | case RFCOMM_UIH: | |
1699 | if (dlci) | |
1700 | return rfcomm_recv_data(s, dlci, __test_pf(hdr->ctrl), skb); | |
1701 | ||
1702 | rfcomm_recv_mcc(s, skb); | |
1703 | break; | |
1704 | ||
1705 | default: | |
5017d8dd | 1706 | BT_ERR("Unknown packet type 0x%02x", type); |
1da177e4 LT |
1707 | break; |
1708 | } | |
1709 | kfree_skb(skb); | |
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | /* ---- Connection and data processing ---- */ | |
1714 | ||
1715 | static void rfcomm_process_connect(struct rfcomm_session *s) | |
1716 | { | |
1717 | struct rfcomm_dlc *d; | |
1718 | struct list_head *p, *n; | |
1719 | ||
1720 | BT_DBG("session %p state %ld", s, s->state); | |
1721 | ||
1722 | list_for_each_safe(p, n, &s->dlcs) { | |
1723 | d = list_entry(p, struct rfcomm_dlc, list); | |
1724 | if (d->state == BT_CONFIG) { | |
1725 | d->mtu = s->mtu; | |
9f2c8a03 | 1726 | if (rfcomm_check_security(d)) { |
8c1b2355 MH |
1727 | rfcomm_send_pn(s, 1, d); |
1728 | } else { | |
77db1980 MH |
1729 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); |
1730 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8c1b2355 | 1731 | } |
1da177e4 LT |
1732 | } |
1733 | } | |
1734 | } | |
1735 | ||
1736 | /* Send data queued for the DLC. | |
1737 | * Return number of frames left in the queue. | |
1738 | */ | |
6039aa73 | 1739 | static int rfcomm_process_tx(struct rfcomm_dlc *d) |
1da177e4 LT |
1740 | { |
1741 | struct sk_buff *skb; | |
1742 | int err; | |
1743 | ||
8e87d142 | 1744 | BT_DBG("dlc %p state %ld cfc %d rx_credits %d tx_credits %d", |
1da177e4 LT |
1745 | d, d->state, d->cfc, d->rx_credits, d->tx_credits); |
1746 | ||
1747 | /* Send pending MSC */ | |
1748 | if (test_and_clear_bit(RFCOMM_MSC_PENDING, &d->flags)) | |
8e87d142 | 1749 | rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); |
1da177e4 LT |
1750 | |
1751 | if (d->cfc) { | |
8e87d142 | 1752 | /* CFC enabled. |
1da177e4 LT |
1753 | * Give them some credits */ |
1754 | if (!test_bit(RFCOMM_RX_THROTTLED, &d->flags) && | |
8e87d142 | 1755 | d->rx_credits <= (d->cfc >> 2)) { |
1da177e4 LT |
1756 | rfcomm_send_credits(d->session, d->addr, d->cfc - d->rx_credits); |
1757 | d->rx_credits = d->cfc; | |
1758 | } | |
1759 | } else { | |
1760 | /* CFC disabled. | |
1761 | * Give ourselves some credits */ | |
1762 | d->tx_credits = 5; | |
1763 | } | |
1764 | ||
1765 | if (test_bit(RFCOMM_TX_THROTTLED, &d->flags)) | |
1766 | return skb_queue_len(&d->tx_queue); | |
1767 | ||
1768 | while (d->tx_credits && (skb = skb_dequeue(&d->tx_queue))) { | |
5436538f | 1769 | err = rfcomm_send_frame(d->session, skb->data, skb->len); |
1da177e4 LT |
1770 | if (err < 0) { |
1771 | skb_queue_head(&d->tx_queue, skb); | |
1772 | break; | |
1773 | } | |
1774 | kfree_skb(skb); | |
1775 | d->tx_credits--; | |
1776 | } | |
1777 | ||
1778 | if (d->cfc && !d->tx_credits) { | |
1779 | /* We're out of TX credits. | |
1780 | * Set TX_THROTTLED flag to avoid unnesary wakeups by dlc_send. */ | |
1781 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1782 | } | |
1783 | ||
1784 | return skb_queue_len(&d->tx_queue); | |
1785 | } | |
1786 | ||
6039aa73 | 1787 | static void rfcomm_process_dlcs(struct rfcomm_session *s) |
1da177e4 LT |
1788 | { |
1789 | struct rfcomm_dlc *d; | |
1790 | struct list_head *p, *n; | |
1791 | ||
1792 | BT_DBG("session %p state %ld", s, s->state); | |
1793 | ||
1794 | list_for_each_safe(p, n, &s->dlcs) { | |
1795 | d = list_entry(p, struct rfcomm_dlc, list); | |
1796 | ||
1797 | if (test_bit(RFCOMM_TIMED_OUT, &d->flags)) { | |
1798 | __rfcomm_dlc_close(d, ETIMEDOUT); | |
1799 | continue; | |
1800 | } | |
1801 | ||
db54467a SJ |
1802 | if (test_bit(RFCOMM_ENC_DROP, &d->flags)) { |
1803 | __rfcomm_dlc_close(d, ECONNREFUSED); | |
1804 | continue; | |
1805 | } | |
1806 | ||
1da177e4 LT |
1807 | if (test_and_clear_bit(RFCOMM_AUTH_ACCEPT, &d->flags)) { |
1808 | rfcomm_dlc_clear_timer(d); | |
77db1980 MH |
1809 | if (d->out) { |
1810 | rfcomm_send_pn(s, 1, d); | |
1811 | rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT); | |
bb23c0ab MH |
1812 | } else { |
1813 | if (d->defer_setup) { | |
1814 | set_bit(RFCOMM_DEFER_SETUP, &d->flags); | |
1815 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8bf47941 MH |
1816 | |
1817 | rfcomm_dlc_lock(d); | |
1818 | d->state = BT_CONNECT2; | |
1819 | d->state_change(d, 0); | |
1820 | rfcomm_dlc_unlock(d); | |
bb23c0ab MH |
1821 | } else |
1822 | rfcomm_dlc_accept(d); | |
1823 | } | |
1da177e4 LT |
1824 | continue; |
1825 | } else if (test_and_clear_bit(RFCOMM_AUTH_REJECT, &d->flags)) { | |
1826 | rfcomm_dlc_clear_timer(d); | |
77db1980 MH |
1827 | if (!d->out) |
1828 | rfcomm_send_dm(s, d->dlci); | |
1829 | else | |
1830 | d->state = BT_CLOSED; | |
1da177e4 LT |
1831 | __rfcomm_dlc_close(d, ECONNREFUSED); |
1832 | continue; | |
1833 | } | |
1834 | ||
6e1031a4 JG |
1835 | if (test_bit(RFCOMM_SEC_PENDING, &d->flags)) |
1836 | continue; | |
1837 | ||
1da177e4 LT |
1838 | if (test_bit(RFCOMM_TX_THROTTLED, &s->flags)) |
1839 | continue; | |
1840 | ||
1841 | if ((d->state == BT_CONNECTED || d->state == BT_DISCONN) && | |
77db1980 | 1842 | d->mscex == RFCOMM_MSCEX_OK) |
1da177e4 LT |
1843 | rfcomm_process_tx(d); |
1844 | } | |
1845 | } | |
1846 | ||
6039aa73 | 1847 | static void rfcomm_process_rx(struct rfcomm_session *s) |
1da177e4 LT |
1848 | { |
1849 | struct socket *sock = s->sock; | |
1850 | struct sock *sk = sock->sk; | |
1851 | struct sk_buff *skb; | |
1852 | ||
1853 | BT_DBG("session %p state %ld qlen %d", s, s->state, skb_queue_len(&sk->sk_receive_queue)); | |
1854 | ||
1855 | /* Get data directly from socket receive queue without copying it. */ | |
1856 | while ((skb = skb_dequeue(&sk->sk_receive_queue))) { | |
1857 | skb_orphan(skb); | |
44935720 MM |
1858 | if (!skb_linearize(skb)) |
1859 | rfcomm_recv_frame(s, skb); | |
1860 | else | |
1861 | kfree_skb(skb); | |
1da177e4 LT |
1862 | } |
1863 | ||
1864 | if (sk->sk_state == BT_CLOSED) { | |
1865 | if (!s->initiator) | |
1866 | rfcomm_session_put(s); | |
1867 | ||
1868 | rfcomm_session_close(s, sk->sk_err); | |
1869 | } | |
1870 | } | |
1871 | ||
6039aa73 | 1872 | static void rfcomm_accept_connection(struct rfcomm_session *s) |
1da177e4 LT |
1873 | { |
1874 | struct socket *sock = s->sock, *nsock; | |
1875 | int err; | |
1876 | ||
1877 | /* Fast check for a new connection. | |
1878 | * Avoids unnesesary socket allocations. */ | |
1879 | if (list_empty(&bt_sk(sock->sk)->accept_q)) | |
1880 | return; | |
1881 | ||
1882 | BT_DBG("session %p", s); | |
1883 | ||
48db9ca4 MH |
1884 | err = kernel_accept(sock, &nsock, O_NONBLOCK); |
1885 | if (err < 0) | |
1da177e4 LT |
1886 | return; |
1887 | ||
1da177e4 LT |
1888 | /* Set our callbacks */ |
1889 | nsock->sk->sk_data_ready = rfcomm_l2data_ready; | |
1890 | nsock->sk->sk_state_change = rfcomm_l2state_change; | |
1891 | ||
1892 | s = rfcomm_session_add(nsock, BT_OPEN); | |
1893 | if (s) { | |
1894 | rfcomm_session_hold(s); | |
98bcd08b MH |
1895 | |
1896 | /* We should adjust MTU on incoming sessions. | |
1897 | * L2CAP MTU minus UIH header and FCS. */ | |
0c1bc5c6 GP |
1898 | s->mtu = min(l2cap_pi(nsock->sk)->chan->omtu, |
1899 | l2cap_pi(nsock->sk)->chan->imtu) - 5; | |
98bcd08b | 1900 | |
534c92fd | 1901 | rfcomm_schedule(); |
1da177e4 LT |
1902 | } else |
1903 | sock_release(nsock); | |
1904 | } | |
1905 | ||
6039aa73 | 1906 | static void rfcomm_check_connection(struct rfcomm_session *s) |
1da177e4 LT |
1907 | { |
1908 | struct sock *sk = s->sock->sk; | |
1909 | ||
1910 | BT_DBG("%p state %ld", s, s->state); | |
1911 | ||
285b4e90 | 1912 | switch (sk->sk_state) { |
1da177e4 LT |
1913 | case BT_CONNECTED: |
1914 | s->state = BT_CONNECT; | |
1915 | ||
1916 | /* We can adjust MTU on outgoing sessions. | |
1917 | * L2CAP MTU minus UIH header and FCS. */ | |
0c1bc5c6 | 1918 | s->mtu = min(l2cap_pi(sk)->chan->omtu, l2cap_pi(sk)->chan->imtu) - 5; |
1da177e4 LT |
1919 | |
1920 | rfcomm_send_sabm(s, 0); | |
1921 | break; | |
1922 | ||
1923 | case BT_CLOSED: | |
1924 | s->state = BT_CLOSED; | |
1925 | rfcomm_session_close(s, sk->sk_err); | |
1926 | break; | |
1927 | } | |
1928 | } | |
1929 | ||
6039aa73 | 1930 | static void rfcomm_process_sessions(void) |
1da177e4 LT |
1931 | { |
1932 | struct list_head *p, *n; | |
1933 | ||
1934 | rfcomm_lock(); | |
1935 | ||
1936 | list_for_each_safe(p, n, &session_list) { | |
1937 | struct rfcomm_session *s; | |
1938 | s = list_entry(p, struct rfcomm_session, list); | |
1939 | ||
9e726b17 LAD |
1940 | if (test_and_clear_bit(RFCOMM_TIMED_OUT, &s->flags)) { |
1941 | s->state = BT_DISCONN; | |
1942 | rfcomm_send_disc(s, 0); | |
485f1eff | 1943 | rfcomm_session_put(s); |
9e726b17 LAD |
1944 | continue; |
1945 | } | |
1946 | ||
1da177e4 LT |
1947 | if (s->state == BT_LISTEN) { |
1948 | rfcomm_accept_connection(s); | |
1949 | continue; | |
1950 | } | |
1951 | ||
1952 | rfcomm_session_hold(s); | |
1953 | ||
1954 | switch (s->state) { | |
1955 | case BT_BOUND: | |
1956 | rfcomm_check_connection(s); | |
1957 | break; | |
1958 | ||
1959 | default: | |
1960 | rfcomm_process_rx(s); | |
1961 | break; | |
1962 | } | |
1963 | ||
1964 | rfcomm_process_dlcs(s); | |
1965 | ||
1966 | rfcomm_session_put(s); | |
1967 | } | |
1968 | ||
1969 | rfcomm_unlock(); | |
1970 | } | |
1971 | ||
1da177e4 LT |
1972 | static int rfcomm_add_listener(bdaddr_t *ba) |
1973 | { | |
1974 | struct sockaddr_l2 addr; | |
1975 | struct socket *sock; | |
1976 | struct sock *sk; | |
1977 | struct rfcomm_session *s; | |
1978 | int err = 0; | |
1979 | ||
1980 | /* Create socket */ | |
1981 | err = rfcomm_l2sock_create(&sock); | |
8e87d142 | 1982 | if (err < 0) { |
1da177e4 LT |
1983 | BT_ERR("Create socket failed %d", err); |
1984 | return err; | |
1985 | } | |
1986 | ||
1987 | /* Bind socket */ | |
1988 | bacpy(&addr.l2_bdaddr, ba); | |
1989 | addr.l2_family = AF_BLUETOOTH; | |
5bcb8094 | 1990 | addr.l2_psm = __constant_cpu_to_le16(RFCOMM_PSM); |
37e62f55 | 1991 | addr.l2_cid = 0; |
48db9ca4 | 1992 | err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); |
1da177e4 LT |
1993 | if (err < 0) { |
1994 | BT_ERR("Bind failed %d", err); | |
1995 | goto failed; | |
1996 | } | |
1997 | ||
1998 | /* Set L2CAP options */ | |
1999 | sk = sock->sk; | |
2000 | lock_sock(sk); | |
0c1bc5c6 | 2001 | l2cap_pi(sk)->chan->imtu = l2cap_mtu; |
1da177e4 LT |
2002 | release_sock(sk); |
2003 | ||
2004 | /* Start listening on the socket */ | |
48db9ca4 | 2005 | err = kernel_listen(sock, 10); |
1da177e4 LT |
2006 | if (err) { |
2007 | BT_ERR("Listen failed %d", err); | |
2008 | goto failed; | |
2009 | } | |
2010 | ||
2011 | /* Add listening session */ | |
2012 | s = rfcomm_session_add(sock, BT_LISTEN); | |
2013 | if (!s) | |
2014 | goto failed; | |
2015 | ||
2016 | rfcomm_session_hold(s); | |
2017 | return 0; | |
2018 | failed: | |
2019 | sock_release(sock); | |
2020 | return err; | |
2021 | } | |
2022 | ||
2023 | static void rfcomm_kill_listener(void) | |
2024 | { | |
2025 | struct rfcomm_session *s; | |
2026 | struct list_head *p, *n; | |
2027 | ||
2028 | BT_DBG(""); | |
2029 | ||
2030 | list_for_each_safe(p, n, &session_list) { | |
2031 | s = list_entry(p, struct rfcomm_session, list); | |
2032 | rfcomm_session_del(s); | |
2033 | } | |
2034 | } | |
2035 | ||
2036 | static int rfcomm_run(void *unused) | |
2037 | { | |
a524eccc | 2038 | BT_DBG(""); |
1da177e4 | 2039 | |
1da177e4 | 2040 | set_user_nice(current, -10); |
1da177e4 | 2041 | |
1da177e4 LT |
2042 | rfcomm_add_listener(BDADDR_ANY); |
2043 | ||
e5842cdb | 2044 | while (1) { |
a524eccc | 2045 | set_current_state(TASK_INTERRUPTIBLE); |
e5842cdb PH |
2046 | |
2047 | if (kthread_should_stop()) | |
2048 | break; | |
a524eccc MH |
2049 | |
2050 | /* Process stuff */ | |
a524eccc | 2051 | rfcomm_process_sessions(); |
e5842cdb PH |
2052 | |
2053 | schedule(); | |
a524eccc | 2054 | } |
e5842cdb | 2055 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
2056 | |
2057 | rfcomm_kill_listener(); | |
2058 | ||
1da177e4 LT |
2059 | return 0; |
2060 | } | |
2061 | ||
8c1b2355 | 2062 | static void rfcomm_security_cfm(struct hci_conn *conn, u8 status, u8 encrypt) |
1da177e4 LT |
2063 | { |
2064 | struct rfcomm_session *s; | |
2065 | struct rfcomm_dlc *d; | |
2066 | struct list_head *p, *n; | |
2067 | ||
2068 | BT_DBG("conn %p status 0x%02x encrypt 0x%02x", conn, status, encrypt); | |
2069 | ||
2070 | s = rfcomm_session_get(&conn->hdev->bdaddr, &conn->dst); | |
2071 | if (!s) | |
2072 | return; | |
2073 | ||
2074 | rfcomm_session_hold(s); | |
2075 | ||
2076 | list_for_each_safe(p, n, &s->dlcs) { | |
2077 | d = list_entry(p, struct rfcomm_dlc, list); | |
2078 | ||
8c84b830 MH |
2079 | if (test_and_clear_bit(RFCOMM_SEC_PENDING, &d->flags)) { |
2080 | rfcomm_dlc_clear_timer(d); | |
2081 | if (status || encrypt == 0x00) { | |
db54467a | 2082 | set_bit(RFCOMM_ENC_DROP, &d->flags); |
8c84b830 MH |
2083 | continue; |
2084 | } | |
2085 | } | |
2086 | ||
2087 | if (d->state == BT_CONNECTED && !status && encrypt == 0x00) { | |
2088 | if (d->sec_level == BT_SECURITY_MEDIUM) { | |
2089 | set_bit(RFCOMM_SEC_PENDING, &d->flags); | |
2090 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
2091 | continue; | |
2092 | } else if (d->sec_level == BT_SECURITY_HIGH) { | |
db54467a | 2093 | set_bit(RFCOMM_ENC_DROP, &d->flags); |
8c84b830 MH |
2094 | continue; |
2095 | } | |
9719f8af MH |
2096 | } |
2097 | ||
1da177e4 LT |
2098 | if (!test_and_clear_bit(RFCOMM_AUTH_PENDING, &d->flags)) |
2099 | continue; | |
2100 | ||
b3b1b061 | 2101 | if (!status && hci_conn_check_secure(conn, d->sec_level)) |
1da177e4 LT |
2102 | set_bit(RFCOMM_AUTH_ACCEPT, &d->flags); |
2103 | else | |
2104 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
2105 | } | |
2106 | ||
2107 | rfcomm_session_put(s); | |
2108 | ||
534c92fd | 2109 | rfcomm_schedule(); |
1da177e4 LT |
2110 | } |
2111 | ||
2112 | static struct hci_cb rfcomm_cb = { | |
2113 | .name = "RFCOMM", | |
8c1b2355 | 2114 | .security_cfm = rfcomm_security_cfm |
1da177e4 LT |
2115 | }; |
2116 | ||
aef7d97c | 2117 | static int rfcomm_dlc_debugfs_show(struct seq_file *f, void *x) |
1da177e4 LT |
2118 | { |
2119 | struct rfcomm_session *s; | |
1da177e4 LT |
2120 | |
2121 | rfcomm_lock(); | |
2122 | ||
8035ded4 LAD |
2123 | list_for_each_entry(s, &session_list, list) { |
2124 | struct rfcomm_dlc *d; | |
2125 | list_for_each_entry(d, &s->dlcs, list) { | |
be9d1227 | 2126 | struct sock *sk = s->sock->sk; |
1da177e4 | 2127 | |
fcb73338 AE |
2128 | seq_printf(f, "%pMR %pMR %ld %d %d %d %d\n", |
2129 | &bt_sk(sk)->src, &bt_sk(sk)->dst, | |
2130 | d->state, d->dlci, d->mtu, | |
2131 | d->rx_credits, d->tx_credits); | |
1da177e4 LT |
2132 | } |
2133 | } | |
1da177e4 | 2134 | |
1da177e4 | 2135 | rfcomm_unlock(); |
1da177e4 | 2136 | |
aef7d97c MH |
2137 | return 0; |
2138 | } | |
2139 | ||
2140 | static int rfcomm_dlc_debugfs_open(struct inode *inode, struct file *file) | |
2141 | { | |
2142 | return single_open(file, rfcomm_dlc_debugfs_show, inode->i_private); | |
1da177e4 LT |
2143 | } |
2144 | ||
aef7d97c MH |
2145 | static const struct file_operations rfcomm_dlc_debugfs_fops = { |
2146 | .open = rfcomm_dlc_debugfs_open, | |
2147 | .read = seq_read, | |
2148 | .llseek = seq_lseek, | |
2149 | .release = single_release, | |
2150 | }; | |
2151 | ||
2152 | static struct dentry *rfcomm_dlc_debugfs; | |
1da177e4 LT |
2153 | |
2154 | /* ---- Initialization ---- */ | |
2155 | static int __init rfcomm_init(void) | |
2156 | { | |
52d18347 | 2157 | int err; |
af0d3b10 | 2158 | |
1da177e4 LT |
2159 | hci_register_cb(&rfcomm_cb); |
2160 | ||
a524eccc MH |
2161 | rfcomm_thread = kthread_run(rfcomm_run, NULL, "krfcommd"); |
2162 | if (IS_ERR(rfcomm_thread)) { | |
52d18347 MH |
2163 | err = PTR_ERR(rfcomm_thread); |
2164 | goto unregister; | |
a524eccc | 2165 | } |
1da177e4 | 2166 | |
aef7d97c MH |
2167 | if (bt_debugfs) { |
2168 | rfcomm_dlc_debugfs = debugfs_create_file("rfcomm_dlc", 0444, | |
2169 | bt_debugfs, NULL, &rfcomm_dlc_debugfs_fops); | |
2170 | if (!rfcomm_dlc_debugfs) | |
2171 | BT_ERR("Failed to create RFCOMM debug file"); | |
2172 | } | |
1da177e4 | 2173 | |
52d18347 MH |
2174 | err = rfcomm_init_ttys(); |
2175 | if (err < 0) | |
2176 | goto stop; | |
1da177e4 | 2177 | |
52d18347 MH |
2178 | err = rfcomm_init_sockets(); |
2179 | if (err < 0) | |
2180 | goto cleanup; | |
1da177e4 | 2181 | |
be9d1227 MH |
2182 | BT_INFO("RFCOMM ver %s", VERSION); |
2183 | ||
1da177e4 | 2184 | return 0; |
af0d3b10 | 2185 | |
52d18347 | 2186 | cleanup: |
af0d3b10 | 2187 | rfcomm_cleanup_ttys(); |
52d18347 MH |
2188 | |
2189 | stop: | |
af0d3b10 | 2190 | kthread_stop(rfcomm_thread); |
52d18347 MH |
2191 | |
2192 | unregister: | |
af0d3b10 DY |
2193 | hci_unregister_cb(&rfcomm_cb); |
2194 | ||
52d18347 | 2195 | return err; |
1da177e4 LT |
2196 | } |
2197 | ||
2198 | static void __exit rfcomm_exit(void) | |
2199 | { | |
aef7d97c | 2200 | debugfs_remove(rfcomm_dlc_debugfs); |
be9d1227 | 2201 | |
1da177e4 LT |
2202 | hci_unregister_cb(&rfcomm_cb); |
2203 | ||
a524eccc | 2204 | kthread_stop(rfcomm_thread); |
1da177e4 | 2205 | |
1da177e4 | 2206 | rfcomm_cleanup_ttys(); |
1da177e4 LT |
2207 | |
2208 | rfcomm_cleanup_sockets(); | |
1da177e4 LT |
2209 | } |
2210 | ||
2211 | module_init(rfcomm_init); | |
2212 | module_exit(rfcomm_exit); | |
2213 | ||
7c2660b0 MH |
2214 | module_param(disable_cfc, bool, 0644); |
2215 | MODULE_PARM_DESC(disable_cfc, "Disable credit based flow control"); | |
2216 | ||
98bcd08b MH |
2217 | module_param(channel_mtu, int, 0644); |
2218 | MODULE_PARM_DESC(channel_mtu, "Default MTU for the RFCOMM channel"); | |
2219 | ||
56f3a40a MH |
2220 | module_param(l2cap_mtu, uint, 0644); |
2221 | MODULE_PARM_DESC(l2cap_mtu, "Default MTU for the L2CAP connection"); | |
2222 | ||
eae38eed MH |
2223 | module_param(l2cap_ertm, bool, 0644); |
2224 | MODULE_PARM_DESC(l2cap_ertm, "Use L2CAP ERTM mode for connection"); | |
2225 | ||
63fbd24e | 2226 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
2227 | MODULE_DESCRIPTION("Bluetooth RFCOMM ver " VERSION); |
2228 | MODULE_VERSION(VERSION); | |
2229 | MODULE_LICENSE("GPL"); | |
2230 | MODULE_ALIAS("bt-proto-3"); |