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 | 71 | static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst); |
8ff52f7d | 72 | static struct rfcomm_session *rfcomm_session_del(struct rfcomm_session *s); |
1da177e4 LT |
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 | ||
1da177e4 LT |
111 | /* ---- RFCOMM FCS computation ---- */ |
112 | ||
408c1ce2 | 113 | /* reversed, 8-bit, poly=0x07 */ |
8e87d142 | 114 | static unsigned char rfcomm_crc_table[256] = { |
408c1ce2 MH |
115 | 0x00, 0x91, 0xe3, 0x72, 0x07, 0x96, 0xe4, 0x75, |
116 | 0x0e, 0x9f, 0xed, 0x7c, 0x09, 0x98, 0xea, 0x7b, | |
117 | 0x1c, 0x8d, 0xff, 0x6e, 0x1b, 0x8a, 0xf8, 0x69, | |
118 | 0x12, 0x83, 0xf1, 0x60, 0x15, 0x84, 0xf6, 0x67, | |
119 | ||
120 | 0x38, 0xa9, 0xdb, 0x4a, 0x3f, 0xae, 0xdc, 0x4d, | |
121 | 0x36, 0xa7, 0xd5, 0x44, 0x31, 0xa0, 0xd2, 0x43, | |
122 | 0x24, 0xb5, 0xc7, 0x56, 0x23, 0xb2, 0xc0, 0x51, | |
123 | 0x2a, 0xbb, 0xc9, 0x58, 0x2d, 0xbc, 0xce, 0x5f, | |
124 | ||
125 | 0x70, 0xe1, 0x93, 0x02, 0x77, 0xe6, 0x94, 0x05, | |
126 | 0x7e, 0xef, 0x9d, 0x0c, 0x79, 0xe8, 0x9a, 0x0b, | |
127 | 0x6c, 0xfd, 0x8f, 0x1e, 0x6b, 0xfa, 0x88, 0x19, | |
128 | 0x62, 0xf3, 0x81, 0x10, 0x65, 0xf4, 0x86, 0x17, | |
129 | ||
130 | 0x48, 0xd9, 0xab, 0x3a, 0x4f, 0xde, 0xac, 0x3d, | |
131 | 0x46, 0xd7, 0xa5, 0x34, 0x41, 0xd0, 0xa2, 0x33, | |
132 | 0x54, 0xc5, 0xb7, 0x26, 0x53, 0xc2, 0xb0, 0x21, | |
133 | 0x5a, 0xcb, 0xb9, 0x28, 0x5d, 0xcc, 0xbe, 0x2f, | |
134 | ||
135 | 0xe0, 0x71, 0x03, 0x92, 0xe7, 0x76, 0x04, 0x95, | |
136 | 0xee, 0x7f, 0x0d, 0x9c, 0xe9, 0x78, 0x0a, 0x9b, | |
137 | 0xfc, 0x6d, 0x1f, 0x8e, 0xfb, 0x6a, 0x18, 0x89, | |
138 | 0xf2, 0x63, 0x11, 0x80, 0xf5, 0x64, 0x16, 0x87, | |
139 | ||
140 | 0xd8, 0x49, 0x3b, 0xaa, 0xdf, 0x4e, 0x3c, 0xad, | |
141 | 0xd6, 0x47, 0x35, 0xa4, 0xd1, 0x40, 0x32, 0xa3, | |
142 | 0xc4, 0x55, 0x27, 0xb6, 0xc3, 0x52, 0x20, 0xb1, | |
143 | 0xca, 0x5b, 0x29, 0xb8, 0xcd, 0x5c, 0x2e, 0xbf, | |
144 | ||
145 | 0x90, 0x01, 0x73, 0xe2, 0x97, 0x06, 0x74, 0xe5, | |
146 | 0x9e, 0x0f, 0x7d, 0xec, 0x99, 0x08, 0x7a, 0xeb, | |
147 | 0x8c, 0x1d, 0x6f, 0xfe, 0x8b, 0x1a, 0x68, 0xf9, | |
148 | 0x82, 0x13, 0x61, 0xf0, 0x85, 0x14, 0x66, 0xf7, | |
149 | ||
150 | 0xa8, 0x39, 0x4b, 0xda, 0xaf, 0x3e, 0x4c, 0xdd, | |
151 | 0xa6, 0x37, 0x45, 0xd4, 0xa1, 0x30, 0x42, 0xd3, | |
152 | 0xb4, 0x25, 0x57, 0xc6, 0xb3, 0x22, 0x50, 0xc1, | |
153 | 0xba, 0x2b, 0x59, 0xc8, 0xbd, 0x2c, 0x5e, 0xcf | |
154 | }; | |
155 | ||
1da177e4 LT |
156 | /* CRC on 2 bytes */ |
157 | #define __crc(data) (rfcomm_crc_table[rfcomm_crc_table[0xff ^ data[0]] ^ data[1]]) | |
158 | ||
8e87d142 | 159 | /* FCS on 2 bytes */ |
1da177e4 LT |
160 | static inline u8 __fcs(u8 *data) |
161 | { | |
a02cec21 | 162 | return 0xff - __crc(data); |
1da177e4 LT |
163 | } |
164 | ||
8e87d142 | 165 | /* FCS on 3 bytes */ |
1da177e4 LT |
166 | static inline u8 __fcs2(u8 *data) |
167 | { | |
a02cec21 | 168 | return 0xff - rfcomm_crc_table[__crc(data) ^ data[2]]; |
1da177e4 LT |
169 | } |
170 | ||
171 | /* Check FCS */ | |
172 | static inline int __check_fcs(u8 *data, int type, u8 fcs) | |
173 | { | |
174 | u8 f = __crc(data); | |
175 | ||
176 | if (type != RFCOMM_UIH) | |
177 | f = rfcomm_crc_table[f ^ data[2]]; | |
178 | ||
179 | return rfcomm_crc_table[f ^ fcs] != 0xcf; | |
180 | } | |
181 | ||
182 | /* ---- L2CAP callbacks ---- */ | |
183 | static void rfcomm_l2state_change(struct sock *sk) | |
184 | { | |
185 | BT_DBG("%p state %d", sk, sk->sk_state); | |
534c92fd | 186 | rfcomm_schedule(); |
1da177e4 LT |
187 | } |
188 | ||
189 | static void rfcomm_l2data_ready(struct sock *sk, int bytes) | |
190 | { | |
191 | BT_DBG("%p bytes %d", sk, bytes); | |
534c92fd | 192 | rfcomm_schedule(); |
1da177e4 LT |
193 | } |
194 | ||
195 | static int rfcomm_l2sock_create(struct socket **sock) | |
196 | { | |
197 | int err; | |
198 | ||
199 | BT_DBG(""); | |
200 | ||
201 | err = sock_create_kern(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP, sock); | |
202 | if (!err) { | |
203 | struct sock *sk = (*sock)->sk; | |
204 | sk->sk_data_ready = rfcomm_l2data_ready; | |
205 | sk->sk_state_change = rfcomm_l2state_change; | |
206 | } | |
207 | return err; | |
208 | } | |
209 | ||
6039aa73 | 210 | static int rfcomm_check_security(struct rfcomm_dlc *d) |
77db1980 MH |
211 | { |
212 | struct sock *sk = d->session->sock->sk; | |
8c1d787b GP |
213 | struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; |
214 | ||
0684e5f9 MH |
215 | __u8 auth_type; |
216 | ||
217 | switch (d->sec_level) { | |
218 | case BT_SECURITY_HIGH: | |
219 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
220 | break; | |
221 | case BT_SECURITY_MEDIUM: | |
222 | auth_type = HCI_AT_GENERAL_BONDING; | |
223 | break; | |
224 | default: | |
225 | auth_type = HCI_AT_NO_BONDING; | |
226 | break; | |
227 | } | |
77db1980 | 228 | |
8c1d787b | 229 | return hci_conn_security(conn->hcon, d->sec_level, auth_type); |
77db1980 MH |
230 | } |
231 | ||
9e726b17 LAD |
232 | static void rfcomm_session_timeout(unsigned long arg) |
233 | { | |
234 | struct rfcomm_session *s = (void *) arg; | |
235 | ||
236 | BT_DBG("session %p state %ld", s, s->state); | |
237 | ||
238 | set_bit(RFCOMM_TIMED_OUT, &s->flags); | |
534c92fd | 239 | rfcomm_schedule(); |
9e726b17 LAD |
240 | } |
241 | ||
242 | static void rfcomm_session_set_timer(struct rfcomm_session *s, long timeout) | |
243 | { | |
244 | BT_DBG("session %p state %ld timeout %ld", s, s->state, timeout); | |
245 | ||
08c30aca | 246 | mod_timer(&s->timer, jiffies + timeout); |
9e726b17 LAD |
247 | } |
248 | ||
249 | static void rfcomm_session_clear_timer(struct rfcomm_session *s) | |
250 | { | |
251 | BT_DBG("session %p state %ld", s, s->state); | |
252 | ||
08c30aca | 253 | del_timer_sync(&s->timer); |
9e726b17 LAD |
254 | } |
255 | ||
1da177e4 LT |
256 | /* ---- RFCOMM DLCs ---- */ |
257 | static void rfcomm_dlc_timeout(unsigned long arg) | |
258 | { | |
259 | struct rfcomm_dlc *d = (void *) arg; | |
260 | ||
261 | BT_DBG("dlc %p state %ld", d, d->state); | |
262 | ||
263 | set_bit(RFCOMM_TIMED_OUT, &d->flags); | |
264 | rfcomm_dlc_put(d); | |
534c92fd | 265 | rfcomm_schedule(); |
1da177e4 LT |
266 | } |
267 | ||
268 | static void rfcomm_dlc_set_timer(struct rfcomm_dlc *d, long timeout) | |
269 | { | |
270 | BT_DBG("dlc %p state %ld timeout %ld", d, d->state, timeout); | |
271 | ||
272 | if (!mod_timer(&d->timer, jiffies + timeout)) | |
273 | rfcomm_dlc_hold(d); | |
274 | } | |
275 | ||
276 | static void rfcomm_dlc_clear_timer(struct rfcomm_dlc *d) | |
277 | { | |
278 | BT_DBG("dlc %p state %ld", d, d->state); | |
279 | ||
25cc4ae9 | 280 | if (del_timer(&d->timer)) |
1da177e4 LT |
281 | rfcomm_dlc_put(d); |
282 | } | |
283 | ||
284 | static void rfcomm_dlc_clear_state(struct rfcomm_dlc *d) | |
285 | { | |
286 | BT_DBG("%p", d); | |
287 | ||
288 | d->state = BT_OPEN; | |
289 | d->flags = 0; | |
290 | d->mscex = 0; | |
183f732c | 291 | d->sec_level = BT_SECURITY_LOW; |
1da177e4 LT |
292 | d->mtu = RFCOMM_DEFAULT_MTU; |
293 | d->v24_sig = RFCOMM_V24_RTC | RFCOMM_V24_RTR | RFCOMM_V24_DV; | |
294 | ||
295 | d->cfc = RFCOMM_CFC_DISABLED; | |
296 | d->rx_credits = RFCOMM_DEFAULT_CREDITS; | |
297 | } | |
298 | ||
dd0fc66f | 299 | struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio) |
1da177e4 | 300 | { |
25ea6db0 MH |
301 | struct rfcomm_dlc *d = kzalloc(sizeof(*d), prio); |
302 | ||
1da177e4 LT |
303 | if (!d) |
304 | return NULL; | |
1da177e4 | 305 | |
b24b8a24 | 306 | setup_timer(&d->timer, rfcomm_dlc_timeout, (unsigned long)d); |
1da177e4 LT |
307 | |
308 | skb_queue_head_init(&d->tx_queue); | |
309 | spin_lock_init(&d->lock); | |
310 | atomic_set(&d->refcnt, 1); | |
311 | ||
312 | rfcomm_dlc_clear_state(d); | |
8e87d142 | 313 | |
1da177e4 | 314 | BT_DBG("%p", d); |
25ea6db0 | 315 | |
1da177e4 LT |
316 | return d; |
317 | } | |
318 | ||
319 | void rfcomm_dlc_free(struct rfcomm_dlc *d) | |
320 | { | |
321 | BT_DBG("%p", d); | |
322 | ||
323 | skb_queue_purge(&d->tx_queue); | |
324 | kfree(d); | |
325 | } | |
326 | ||
327 | static void rfcomm_dlc_link(struct rfcomm_session *s, struct rfcomm_dlc *d) | |
328 | { | |
329 | BT_DBG("dlc %p session %p", d, s); | |
330 | ||
9e726b17 | 331 | rfcomm_session_clear_timer(s); |
1da177e4 LT |
332 | rfcomm_dlc_hold(d); |
333 | list_add(&d->list, &s->dlcs); | |
334 | d->session = s; | |
335 | } | |
336 | ||
337 | static void rfcomm_dlc_unlink(struct rfcomm_dlc *d) | |
338 | { | |
339 | struct rfcomm_session *s = d->session; | |
340 | ||
341 | BT_DBG("dlc %p refcnt %d session %p", d, atomic_read(&d->refcnt), s); | |
342 | ||
343 | list_del(&d->list); | |
344 | d->session = NULL; | |
345 | rfcomm_dlc_put(d); | |
346 | ||
9e726b17 LAD |
347 | if (list_empty(&s->dlcs)) |
348 | rfcomm_session_set_timer(s, RFCOMM_IDLE_TIMEOUT); | |
1da177e4 LT |
349 | } |
350 | ||
351 | static struct rfcomm_dlc *rfcomm_dlc_get(struct rfcomm_session *s, u8 dlci) | |
352 | { | |
353 | struct rfcomm_dlc *d; | |
1da177e4 | 354 | |
8035ded4 | 355 | list_for_each_entry(d, &s->dlcs, list) |
1da177e4 LT |
356 | if (d->dlci == dlci) |
357 | return d; | |
8035ded4 | 358 | |
1da177e4 LT |
359 | return NULL; |
360 | } | |
361 | ||
362 | static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) | |
363 | { | |
364 | struct rfcomm_session *s; | |
365 | int err = 0; | |
366 | u8 dlci; | |
367 | ||
6ed93dc6 AE |
368 | BT_DBG("dlc %p state %ld %pMR -> %pMR channel %d", |
369 | d, d->state, src, dst, channel); | |
1da177e4 LT |
370 | |
371 | if (channel < 1 || channel > 30) | |
372 | return -EINVAL; | |
373 | ||
374 | if (d->state != BT_OPEN && d->state != BT_CLOSED) | |
375 | return 0; | |
376 | ||
377 | s = rfcomm_session_get(src, dst); | |
378 | if (!s) { | |
63ce0900 | 379 | s = rfcomm_session_create(src, dst, d->sec_level, &err); |
1da177e4 LT |
380 | if (!s) |
381 | return err; | |
382 | } | |
383 | ||
384 | dlci = __dlci(!s->initiator, channel); | |
385 | ||
386 | /* Check if DLCI already exists */ | |
387 | if (rfcomm_dlc_get(s, dlci)) | |
388 | return -EBUSY; | |
389 | ||
390 | rfcomm_dlc_clear_state(d); | |
391 | ||
392 | d->dlci = dlci; | |
393 | d->addr = __addr(s->initiator, dlci); | |
394 | d->priority = 7; | |
395 | ||
77db1980 | 396 | d->state = BT_CONFIG; |
1da177e4 LT |
397 | rfcomm_dlc_link(s, d); |
398 | ||
77db1980 MH |
399 | d->out = 1; |
400 | ||
1da177e4 LT |
401 | d->mtu = s->mtu; |
402 | d->cfc = (s->cfc == RFCOMM_CFC_UNKNOWN) ? 0 : s->cfc; | |
403 | ||
77db1980 | 404 | if (s->state == BT_CONNECTED) { |
9f2c8a03 | 405 | if (rfcomm_check_security(d)) |
77db1980 | 406 | rfcomm_send_pn(s, 1, d); |
8c1b2355 MH |
407 | else |
408 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); | |
77db1980 MH |
409 | } |
410 | ||
1da177e4 | 411 | rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT); |
77db1980 | 412 | |
1da177e4 LT |
413 | return 0; |
414 | } | |
415 | ||
416 | int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel) | |
417 | { | |
418 | int r; | |
419 | ||
420 | rfcomm_lock(); | |
421 | ||
422 | r = __rfcomm_dlc_open(d, src, dst, channel); | |
423 | ||
424 | rfcomm_unlock(); | |
425 | return r; | |
426 | } | |
427 | ||
428 | static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err) | |
429 | { | |
430 | struct rfcomm_session *s = d->session; | |
431 | if (!s) | |
432 | return 0; | |
433 | ||
434 | BT_DBG("dlc %p state %ld dlci %d err %d session %p", | |
435 | d, d->state, d->dlci, err, s); | |
436 | ||
437 | switch (d->state) { | |
1da177e4 | 438 | case BT_CONNECT: |
bb23c0ab MH |
439 | case BT_CONFIG: |
440 | if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { | |
441 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
534c92fd | 442 | rfcomm_schedule(); |
bb23c0ab MH |
443 | break; |
444 | } | |
445 | /* Fall through */ | |
446 | ||
447 | case BT_CONNECTED: | |
1da177e4 LT |
448 | d->state = BT_DISCONN; |
449 | if (skb_queue_empty(&d->tx_queue)) { | |
450 | rfcomm_send_disc(s, d->dlci); | |
451 | rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT); | |
452 | } else { | |
453 | rfcomm_queue_disc(d); | |
454 | rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT * 2); | |
455 | } | |
456 | break; | |
457 | ||
bb23c0ab | 458 | case BT_OPEN: |
8bf47941 | 459 | case BT_CONNECT2: |
bb23c0ab MH |
460 | if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { |
461 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
534c92fd | 462 | rfcomm_schedule(); |
bb23c0ab MH |
463 | break; |
464 | } | |
465 | /* Fall through */ | |
466 | ||
1da177e4 LT |
467 | default: |
468 | rfcomm_dlc_clear_timer(d); | |
469 | ||
470 | rfcomm_dlc_lock(d); | |
471 | d->state = BT_CLOSED; | |
1905f6c7 | 472 | d->state_change(d, err); |
4c8411f8 | 473 | rfcomm_dlc_unlock(d); |
1da177e4 LT |
474 | |
475 | skb_queue_purge(&d->tx_queue); | |
1da177e4 LT |
476 | rfcomm_dlc_unlink(d); |
477 | } | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
482 | int rfcomm_dlc_close(struct rfcomm_dlc *d, int err) | |
483 | { | |
c06f7d53 DJ |
484 | int r = 0; |
485 | struct rfcomm_dlc *d_list; | |
486 | struct rfcomm_session *s, *s_list; | |
487 | ||
488 | BT_DBG("dlc %p state %ld dlci %d err %d", d, d->state, d->dlci, err); | |
1da177e4 LT |
489 | |
490 | rfcomm_lock(); | |
491 | ||
c06f7d53 DJ |
492 | s = d->session; |
493 | if (!s) | |
494 | goto no_session; | |
495 | ||
496 | /* after waiting on the mutex check the session still exists | |
497 | * then check the dlc still exists | |
498 | */ | |
499 | list_for_each_entry(s_list, &session_list, list) { | |
500 | if (s_list == s) { | |
501 | list_for_each_entry(d_list, &s->dlcs, list) { | |
502 | if (d_list == d) { | |
503 | r = __rfcomm_dlc_close(d, err); | |
504 | break; | |
505 | } | |
506 | } | |
507 | break; | |
508 | } | |
509 | } | |
1da177e4 | 510 | |
c06f7d53 | 511 | no_session: |
1da177e4 LT |
512 | rfcomm_unlock(); |
513 | return r; | |
514 | } | |
515 | ||
516 | int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb) | |
517 | { | |
518 | int len = skb->len; | |
519 | ||
520 | if (d->state != BT_CONNECTED) | |
521 | return -ENOTCONN; | |
522 | ||
523 | BT_DBG("dlc %p mtu %d len %d", d, d->mtu, len); | |
524 | ||
525 | if (len > d->mtu) | |
526 | return -EINVAL; | |
527 | ||
528 | rfcomm_make_uih(skb, d->addr); | |
529 | skb_queue_tail(&d->tx_queue, skb); | |
530 | ||
531 | if (!test_bit(RFCOMM_TX_THROTTLED, &d->flags)) | |
534c92fd | 532 | rfcomm_schedule(); |
1da177e4 LT |
533 | return len; |
534 | } | |
535 | ||
b5606c2d | 536 | void __rfcomm_dlc_throttle(struct rfcomm_dlc *d) |
1da177e4 LT |
537 | { |
538 | BT_DBG("dlc %p state %ld", d, d->state); | |
539 | ||
540 | if (!d->cfc) { | |
541 | d->v24_sig |= RFCOMM_V24_FC; | |
542 | set_bit(RFCOMM_MSC_PENDING, &d->flags); | |
543 | } | |
534c92fd | 544 | rfcomm_schedule(); |
1da177e4 LT |
545 | } |
546 | ||
b5606c2d | 547 | void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d) |
1da177e4 LT |
548 | { |
549 | BT_DBG("dlc %p state %ld", d, d->state); | |
550 | ||
551 | if (!d->cfc) { | |
552 | d->v24_sig &= ~RFCOMM_V24_FC; | |
553 | set_bit(RFCOMM_MSC_PENDING, &d->flags); | |
554 | } | |
534c92fd | 555 | rfcomm_schedule(); |
1da177e4 LT |
556 | } |
557 | ||
8e87d142 | 558 | /* |
1da177e4 LT |
559 | Set/get modem status functions use _local_ status i.e. what we report |
560 | to the other side. | |
561 | Remote status is provided by dlc->modem_status() callback. | |
562 | */ | |
563 | int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig) | |
564 | { | |
8e87d142 | 565 | BT_DBG("dlc %p state %ld v24_sig 0x%x", |
1da177e4 LT |
566 | d, d->state, v24_sig); |
567 | ||
568 | if (test_bit(RFCOMM_RX_THROTTLED, &d->flags)) | |
569 | v24_sig |= RFCOMM_V24_FC; | |
570 | else | |
571 | v24_sig &= ~RFCOMM_V24_FC; | |
8e87d142 | 572 | |
1da177e4 LT |
573 | d->v24_sig = v24_sig; |
574 | ||
575 | if (!test_and_set_bit(RFCOMM_MSC_PENDING, &d->flags)) | |
534c92fd | 576 | rfcomm_schedule(); |
1da177e4 LT |
577 | |
578 | return 0; | |
579 | } | |
580 | ||
581 | int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig) | |
582 | { | |
8e87d142 | 583 | BT_DBG("dlc %p state %ld v24_sig 0x%x", |
1da177e4 LT |
584 | d, d->state, d->v24_sig); |
585 | ||
586 | *v24_sig = d->v24_sig; | |
587 | return 0; | |
588 | } | |
589 | ||
590 | /* ---- RFCOMM sessions ---- */ | |
591 | static struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state) | |
592 | { | |
25ea6db0 MH |
593 | struct rfcomm_session *s = kzalloc(sizeof(*s), GFP_KERNEL); |
594 | ||
1da177e4 LT |
595 | if (!s) |
596 | return NULL; | |
1da177e4 LT |
597 | |
598 | BT_DBG("session %p sock %p", s, sock); | |
599 | ||
9e726b17 LAD |
600 | setup_timer(&s->timer, rfcomm_session_timeout, (unsigned long) s); |
601 | ||
1da177e4 LT |
602 | INIT_LIST_HEAD(&s->dlcs); |
603 | s->state = state; | |
604 | s->sock = sock; | |
605 | ||
606 | s->mtu = RFCOMM_DEFAULT_MTU; | |
7c2660b0 | 607 | s->cfc = disable_cfc ? RFCOMM_CFC_DISABLED : RFCOMM_CFC_UNKNOWN; |
1da177e4 LT |
608 | |
609 | /* Do not increment module usage count for listening sessions. | |
610 | * Otherwise we won't be able to unload the module. */ | |
611 | if (state != BT_LISTEN) | |
612 | if (!try_module_get(THIS_MODULE)) { | |
613 | kfree(s); | |
614 | return NULL; | |
615 | } | |
616 | ||
617 | list_add(&s->list, &session_list); | |
618 | ||
619 | return s; | |
620 | } | |
621 | ||
8ff52f7d | 622 | static struct rfcomm_session *rfcomm_session_del(struct rfcomm_session *s) |
1da177e4 LT |
623 | { |
624 | int state = s->state; | |
625 | ||
626 | BT_DBG("session %p state %ld", s, s->state); | |
627 | ||
628 | list_del(&s->list); | |
629 | ||
9e726b17 | 630 | rfcomm_session_clear_timer(s); |
1da177e4 LT |
631 | sock_release(s->sock); |
632 | kfree(s); | |
633 | ||
634 | if (state != BT_LISTEN) | |
635 | module_put(THIS_MODULE); | |
8ff52f7d DJ |
636 | |
637 | return NULL; | |
1da177e4 LT |
638 | } |
639 | ||
640 | static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst) | |
641 | { | |
642 | struct rfcomm_session *s; | |
643 | struct list_head *p, *n; | |
644 | struct bt_sock *sk; | |
645 | list_for_each_safe(p, n, &session_list) { | |
646 | s = list_entry(p, struct rfcomm_session, list); | |
8e87d142 | 647 | sk = bt_sk(s->sock->sk); |
1da177e4 LT |
648 | |
649 | if ((!bacmp(src, BDADDR_ANY) || !bacmp(&sk->src, src)) && | |
650 | !bacmp(&sk->dst, dst)) | |
651 | return s; | |
652 | } | |
653 | return NULL; | |
654 | } | |
655 | ||
8ff52f7d DJ |
656 | static struct rfcomm_session *rfcomm_session_close(struct rfcomm_session *s, |
657 | int err) | |
1da177e4 LT |
658 | { |
659 | struct rfcomm_dlc *d; | |
660 | struct list_head *p, *n; | |
661 | ||
1da177e4 LT |
662 | s->state = BT_CLOSED; |
663 | ||
24fd642c DJ |
664 | BT_DBG("session %p state %ld err %d", s, s->state, err); |
665 | ||
1da177e4 LT |
666 | /* Close all dlcs */ |
667 | list_for_each_safe(p, n, &s->dlcs) { | |
668 | d = list_entry(p, struct rfcomm_dlc, list); | |
669 | d->state = BT_CLOSED; | |
670 | __rfcomm_dlc_close(d, err); | |
671 | } | |
672 | ||
9e726b17 | 673 | rfcomm_session_clear_timer(s); |
08c30aca | 674 | return rfcomm_session_del(s); |
1da177e4 LT |
675 | } |
676 | ||
63ce0900 LAD |
677 | static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, |
678 | bdaddr_t *dst, | |
679 | u8 sec_level, | |
680 | int *err) | |
1da177e4 LT |
681 | { |
682 | struct rfcomm_session *s = NULL; | |
683 | struct sockaddr_l2 addr; | |
684 | struct socket *sock; | |
685 | struct sock *sk; | |
686 | ||
6ed93dc6 | 687 | BT_DBG("%pMR -> %pMR", src, dst); |
1da177e4 LT |
688 | |
689 | *err = rfcomm_l2sock_create(&sock); | |
690 | if (*err < 0) | |
691 | return NULL; | |
692 | ||
693 | bacpy(&addr.l2_bdaddr, src); | |
694 | addr.l2_family = AF_BLUETOOTH; | |
695 | addr.l2_psm = 0; | |
37e62f55 | 696 | addr.l2_cid = 0; |
48db9ca4 | 697 | *err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); |
1da177e4 LT |
698 | if (*err < 0) |
699 | goto failed; | |
700 | ||
701 | /* Set L2CAP options */ | |
702 | sk = sock->sk; | |
703 | lock_sock(sk); | |
0c1bc5c6 | 704 | l2cap_pi(sk)->chan->imtu = l2cap_mtu; |
47d1ec61 | 705 | l2cap_pi(sk)->chan->sec_level = sec_level; |
eae38eed | 706 | if (l2cap_ertm) |
0c1bc5c6 | 707 | l2cap_pi(sk)->chan->mode = L2CAP_MODE_ERTM; |
1da177e4 LT |
708 | release_sock(sk); |
709 | ||
710 | s = rfcomm_session_add(sock, BT_BOUND); | |
711 | if (!s) { | |
712 | *err = -ENOMEM; | |
713 | goto failed; | |
714 | } | |
715 | ||
1da177e4 LT |
716 | s->initiator = 1; |
717 | ||
718 | bacpy(&addr.l2_bdaddr, dst); | |
719 | addr.l2_family = AF_BLUETOOTH; | |
5bcb8094 | 720 | addr.l2_psm = __constant_cpu_to_le16(RFCOMM_PSM); |
37e62f55 | 721 | addr.l2_cid = 0; |
48db9ca4 | 722 | *err = kernel_connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK); |
b4c612a4 | 723 | if (*err == 0 || *err == -EINPROGRESS) |
1da177e4 LT |
724 | return s; |
725 | ||
8ff52f7d | 726 | return rfcomm_session_del(s); |
1da177e4 LT |
727 | |
728 | failed: | |
729 | sock_release(sock); | |
730 | return NULL; | |
731 | } | |
732 | ||
733 | void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst) | |
734 | { | |
735 | struct sock *sk = s->sock->sk; | |
736 | if (src) | |
737 | bacpy(src, &bt_sk(sk)->src); | |
738 | if (dst) | |
739 | bacpy(dst, &bt_sk(sk)->dst); | |
740 | } | |
741 | ||
742 | /* ---- RFCOMM frame sending ---- */ | |
5436538f | 743 | static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len) |
1da177e4 | 744 | { |
1da177e4 LT |
745 | struct kvec iv = { data, len }; |
746 | struct msghdr msg; | |
747 | ||
5436538f | 748 | BT_DBG("session %p len %d", s, len); |
1da177e4 LT |
749 | |
750 | memset(&msg, 0, sizeof(msg)); | |
751 | ||
5436538f | 752 | return kernel_sendmsg(s->sock, &msg, &iv, 1, len); |
1da177e4 LT |
753 | } |
754 | ||
262038fc LAD |
755 | static int rfcomm_send_cmd(struct rfcomm_session *s, struct rfcomm_cmd *cmd) |
756 | { | |
757 | BT_DBG("%p cmd %u", s, cmd->ctrl); | |
758 | ||
5436538f | 759 | return rfcomm_send_frame(s, (void *) cmd, sizeof(*cmd)); |
262038fc LAD |
760 | } |
761 | ||
1da177e4 LT |
762 | static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci) |
763 | { | |
764 | struct rfcomm_cmd cmd; | |
765 | ||
766 | BT_DBG("%p dlci %d", s, dlci); | |
767 | ||
768 | cmd.addr = __addr(s->initiator, dlci); | |
769 | cmd.ctrl = __ctrl(RFCOMM_SABM, 1); | |
770 | cmd.len = __len8(0); | |
771 | cmd.fcs = __fcs2((u8 *) &cmd); | |
772 | ||
262038fc | 773 | return rfcomm_send_cmd(s, &cmd); |
1da177e4 LT |
774 | } |
775 | ||
776 | static int rfcomm_send_ua(struct rfcomm_session *s, u8 dlci) | |
777 | { | |
778 | struct rfcomm_cmd cmd; | |
779 | ||
780 | BT_DBG("%p dlci %d", s, dlci); | |
781 | ||
782 | cmd.addr = __addr(!s->initiator, dlci); | |
783 | cmd.ctrl = __ctrl(RFCOMM_UA, 1); | |
784 | cmd.len = __len8(0); | |
785 | cmd.fcs = __fcs2((u8 *) &cmd); | |
786 | ||
262038fc | 787 | return rfcomm_send_cmd(s, &cmd); |
1da177e4 LT |
788 | } |
789 | ||
790 | static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci) | |
791 | { | |
792 | struct rfcomm_cmd cmd; | |
793 | ||
794 | BT_DBG("%p dlci %d", s, dlci); | |
795 | ||
796 | cmd.addr = __addr(s->initiator, dlci); | |
797 | cmd.ctrl = __ctrl(RFCOMM_DISC, 1); | |
798 | cmd.len = __len8(0); | |
799 | cmd.fcs = __fcs2((u8 *) &cmd); | |
800 | ||
262038fc | 801 | return rfcomm_send_cmd(s, &cmd); |
1da177e4 LT |
802 | } |
803 | ||
804 | static int rfcomm_queue_disc(struct rfcomm_dlc *d) | |
805 | { | |
806 | struct rfcomm_cmd *cmd; | |
807 | struct sk_buff *skb; | |
808 | ||
809 | BT_DBG("dlc %p dlci %d", d, d->dlci); | |
810 | ||
811 | skb = alloc_skb(sizeof(*cmd), GFP_KERNEL); | |
812 | if (!skb) | |
813 | return -ENOMEM; | |
814 | ||
815 | cmd = (void *) __skb_put(skb, sizeof(*cmd)); | |
816 | cmd->addr = d->addr; | |
817 | cmd->ctrl = __ctrl(RFCOMM_DISC, 1); | |
818 | cmd->len = __len8(0); | |
819 | cmd->fcs = __fcs2((u8 *) cmd); | |
820 | ||
821 | skb_queue_tail(&d->tx_queue, skb); | |
534c92fd | 822 | rfcomm_schedule(); |
1da177e4 LT |
823 | return 0; |
824 | } | |
825 | ||
826 | static int rfcomm_send_dm(struct rfcomm_session *s, u8 dlci) | |
827 | { | |
828 | struct rfcomm_cmd cmd; | |
829 | ||
830 | BT_DBG("%p dlci %d", s, dlci); | |
831 | ||
832 | cmd.addr = __addr(!s->initiator, dlci); | |
833 | cmd.ctrl = __ctrl(RFCOMM_DM, 1); | |
834 | cmd.len = __len8(0); | |
835 | cmd.fcs = __fcs2((u8 *) &cmd); | |
836 | ||
262038fc | 837 | return rfcomm_send_cmd(s, &cmd); |
1da177e4 LT |
838 | } |
839 | ||
840 | static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type) | |
841 | { | |
842 | struct rfcomm_hdr *hdr; | |
843 | struct rfcomm_mcc *mcc; | |
844 | u8 buf[16], *ptr = buf; | |
845 | ||
846 | BT_DBG("%p cr %d type %d", s, cr, type); | |
847 | ||
848 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
849 | hdr->addr = __addr(s->initiator, 0); | |
850 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
851 | hdr->len = __len8(sizeof(*mcc) + 1); | |
852 | ||
853 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
854 | mcc->type = __mcc_type(cr, RFCOMM_NSC); | |
855 | mcc->len = __len8(1); | |
856 | ||
857 | /* Type that we didn't like */ | |
858 | *ptr = __mcc_type(cr, type); ptr++; | |
859 | ||
860 | *ptr = __fcs(buf); ptr++; | |
861 | ||
5436538f | 862 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
863 | } |
864 | ||
865 | static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d) | |
866 | { | |
867 | struct rfcomm_hdr *hdr; | |
868 | struct rfcomm_mcc *mcc; | |
869 | struct rfcomm_pn *pn; | |
870 | u8 buf[16], *ptr = buf; | |
871 | ||
872 | BT_DBG("%p cr %d dlci %d mtu %d", s, cr, d->dlci, d->mtu); | |
873 | ||
874 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
875 | hdr->addr = __addr(s->initiator, 0); | |
876 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
877 | hdr->len = __len8(sizeof(*mcc) + sizeof(*pn)); | |
878 | ||
879 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
880 | mcc->type = __mcc_type(cr, RFCOMM_PN); | |
881 | mcc->len = __len8(sizeof(*pn)); | |
882 | ||
883 | pn = (void *) ptr; ptr += sizeof(*pn); | |
884 | pn->dlci = d->dlci; | |
885 | pn->priority = d->priority; | |
886 | pn->ack_timer = 0; | |
887 | pn->max_retrans = 0; | |
888 | ||
889 | if (s->cfc) { | |
890 | pn->flow_ctrl = cr ? 0xf0 : 0xe0; | |
891 | pn->credits = RFCOMM_DEFAULT_CREDITS; | |
892 | } else { | |
893 | pn->flow_ctrl = 0; | |
894 | pn->credits = 0; | |
895 | } | |
896 | ||
98bcd08b | 897 | if (cr && channel_mtu >= 0) |
b4324b5d | 898 | pn->mtu = cpu_to_le16(channel_mtu); |
98bcd08b | 899 | else |
b4324b5d | 900 | pn->mtu = cpu_to_le16(d->mtu); |
1da177e4 LT |
901 | |
902 | *ptr = __fcs(buf); ptr++; | |
903 | ||
5436538f | 904 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
905 | } |
906 | ||
3a5e903c S |
907 | int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci, |
908 | u8 bit_rate, u8 data_bits, u8 stop_bits, | |
8e87d142 | 909 | u8 parity, u8 flow_ctrl_settings, |
3a5e903c | 910 | u8 xon_char, u8 xoff_char, u16 param_mask) |
1da177e4 LT |
911 | { |
912 | struct rfcomm_hdr *hdr; | |
913 | struct rfcomm_mcc *mcc; | |
914 | struct rfcomm_rpn *rpn; | |
915 | u8 buf[16], *ptr = buf; | |
916 | ||
917 | BT_DBG("%p cr %d dlci %d bit_r 0x%x data_b 0x%x stop_b 0x%x parity 0x%x" | |
8e87d142 YH |
918 | " flwc_s 0x%x xon_c 0x%x xoff_c 0x%x p_mask 0x%x", |
919 | s, cr, dlci, bit_rate, data_bits, stop_bits, parity, | |
3a5e903c | 920 | flow_ctrl_settings, xon_char, xoff_char, param_mask); |
1da177e4 LT |
921 | |
922 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
923 | hdr->addr = __addr(s->initiator, 0); | |
924 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
925 | hdr->len = __len8(sizeof(*mcc) + sizeof(*rpn)); | |
926 | ||
927 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
928 | mcc->type = __mcc_type(cr, RFCOMM_RPN); | |
929 | mcc->len = __len8(sizeof(*rpn)); | |
930 | ||
931 | rpn = (void *) ptr; ptr += sizeof(*rpn); | |
932 | rpn->dlci = __addr(1, dlci); | |
933 | rpn->bit_rate = bit_rate; | |
934 | rpn->line_settings = __rpn_line_settings(data_bits, stop_bits, parity); | |
935 | rpn->flow_ctrl = flow_ctrl_settings; | |
936 | rpn->xon_char = xon_char; | |
937 | rpn->xoff_char = xoff_char; | |
e8db8c99 | 938 | rpn->param_mask = cpu_to_le16(param_mask); |
1da177e4 LT |
939 | |
940 | *ptr = __fcs(buf); ptr++; | |
941 | ||
5436538f | 942 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
943 | } |
944 | ||
945 | static int rfcomm_send_rls(struct rfcomm_session *s, int cr, u8 dlci, u8 status) | |
946 | { | |
947 | struct rfcomm_hdr *hdr; | |
948 | struct rfcomm_mcc *mcc; | |
949 | struct rfcomm_rls *rls; | |
950 | u8 buf[16], *ptr = buf; | |
951 | ||
952 | BT_DBG("%p cr %d status 0x%x", s, cr, status); | |
953 | ||
954 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
955 | hdr->addr = __addr(s->initiator, 0); | |
956 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
957 | hdr->len = __len8(sizeof(*mcc) + sizeof(*rls)); | |
958 | ||
959 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
960 | mcc->type = __mcc_type(cr, RFCOMM_RLS); | |
961 | mcc->len = __len8(sizeof(*rls)); | |
962 | ||
963 | rls = (void *) ptr; ptr += sizeof(*rls); | |
964 | rls->dlci = __addr(1, dlci); | |
965 | rls->status = status; | |
966 | ||
967 | *ptr = __fcs(buf); ptr++; | |
968 | ||
5436538f | 969 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
970 | } |
971 | ||
972 | static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig) | |
973 | { | |
974 | struct rfcomm_hdr *hdr; | |
975 | struct rfcomm_mcc *mcc; | |
976 | struct rfcomm_msc *msc; | |
977 | u8 buf[16], *ptr = buf; | |
978 | ||
979 | BT_DBG("%p cr %d v24 0x%x", s, cr, v24_sig); | |
980 | ||
981 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
982 | hdr->addr = __addr(s->initiator, 0); | |
983 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
984 | hdr->len = __len8(sizeof(*mcc) + sizeof(*msc)); | |
985 | ||
986 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
987 | mcc->type = __mcc_type(cr, RFCOMM_MSC); | |
988 | mcc->len = __len8(sizeof(*msc)); | |
989 | ||
990 | msc = (void *) ptr; ptr += sizeof(*msc); | |
991 | msc->dlci = __addr(1, dlci); | |
992 | msc->v24_sig = v24_sig | 0x01; | |
993 | ||
994 | *ptr = __fcs(buf); ptr++; | |
995 | ||
5436538f | 996 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
997 | } |
998 | ||
999 | static int rfcomm_send_fcoff(struct rfcomm_session *s, int cr) | |
1000 | { | |
1001 | struct rfcomm_hdr *hdr; | |
1002 | struct rfcomm_mcc *mcc; | |
1003 | u8 buf[16], *ptr = buf; | |
1004 | ||
1005 | BT_DBG("%p cr %d", s, cr); | |
1006 | ||
1007 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1008 | hdr->addr = __addr(s->initiator, 0); | |
1009 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1010 | hdr->len = __len8(sizeof(*mcc)); | |
1011 | ||
1012 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
1013 | mcc->type = __mcc_type(cr, RFCOMM_FCOFF); | |
1014 | mcc->len = __len8(0); | |
1015 | ||
1016 | *ptr = __fcs(buf); ptr++; | |
1017 | ||
5436538f | 1018 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
1019 | } |
1020 | ||
1021 | static int rfcomm_send_fcon(struct rfcomm_session *s, int cr) | |
1022 | { | |
1023 | struct rfcomm_hdr *hdr; | |
1024 | struct rfcomm_mcc *mcc; | |
1025 | u8 buf[16], *ptr = buf; | |
1026 | ||
1027 | BT_DBG("%p cr %d", s, cr); | |
1028 | ||
1029 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1030 | hdr->addr = __addr(s->initiator, 0); | |
1031 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1032 | hdr->len = __len8(sizeof(*mcc)); | |
1033 | ||
1034 | mcc = (void *) ptr; ptr += sizeof(*mcc); | |
1035 | mcc->type = __mcc_type(cr, RFCOMM_FCON); | |
1036 | mcc->len = __len8(0); | |
1037 | ||
1038 | *ptr = __fcs(buf); ptr++; | |
1039 | ||
5436538f | 1040 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
1041 | } |
1042 | ||
1043 | static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len) | |
1044 | { | |
1045 | struct socket *sock = s->sock; | |
1046 | struct kvec iv[3]; | |
1047 | struct msghdr msg; | |
1048 | unsigned char hdr[5], crc[1]; | |
1049 | ||
1050 | if (len > 125) | |
1051 | return -EINVAL; | |
1052 | ||
1053 | BT_DBG("%p cr %d", s, cr); | |
1054 | ||
1055 | hdr[0] = __addr(s->initiator, 0); | |
1056 | hdr[1] = __ctrl(RFCOMM_UIH, 0); | |
1057 | hdr[2] = 0x01 | ((len + 2) << 1); | |
1058 | hdr[3] = 0x01 | ((cr & 0x01) << 1) | (RFCOMM_TEST << 2); | |
1059 | hdr[4] = 0x01 | (len << 1); | |
1060 | ||
1061 | crc[0] = __fcs(hdr); | |
1062 | ||
1063 | iv[0].iov_base = hdr; | |
1064 | iv[0].iov_len = 5; | |
1065 | iv[1].iov_base = pattern; | |
1066 | iv[1].iov_len = len; | |
1067 | iv[2].iov_base = crc; | |
1068 | iv[2].iov_len = 1; | |
1069 | ||
1070 | memset(&msg, 0, sizeof(msg)); | |
1071 | ||
1072 | return kernel_sendmsg(sock, &msg, iv, 3, 6 + len); | |
1073 | } | |
1074 | ||
1075 | static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits) | |
1076 | { | |
1077 | struct rfcomm_hdr *hdr; | |
1078 | u8 buf[16], *ptr = buf; | |
1079 | ||
1080 | BT_DBG("%p addr %d credits %d", s, addr, credits); | |
1081 | ||
1082 | hdr = (void *) ptr; ptr += sizeof(*hdr); | |
1083 | hdr->addr = addr; | |
1084 | hdr->ctrl = __ctrl(RFCOMM_UIH, 1); | |
1085 | hdr->len = __len8(0); | |
1086 | ||
1087 | *ptr = credits; ptr++; | |
1088 | ||
1089 | *ptr = __fcs(buf); ptr++; | |
1090 | ||
5436538f | 1091 | return rfcomm_send_frame(s, buf, ptr - buf); |
1da177e4 LT |
1092 | } |
1093 | ||
1094 | static void rfcomm_make_uih(struct sk_buff *skb, u8 addr) | |
1095 | { | |
1096 | struct rfcomm_hdr *hdr; | |
1097 | int len = skb->len; | |
1098 | u8 *crc; | |
1099 | ||
1100 | if (len > 127) { | |
1101 | hdr = (void *) skb_push(skb, 4); | |
b4324b5d | 1102 | put_unaligned(cpu_to_le16(__len16(len)), (__le16 *) &hdr->len); |
1da177e4 LT |
1103 | } else { |
1104 | hdr = (void *) skb_push(skb, 3); | |
1105 | hdr->len = __len8(len); | |
1106 | } | |
1107 | hdr->addr = addr; | |
1108 | hdr->ctrl = __ctrl(RFCOMM_UIH, 0); | |
1109 | ||
1110 | crc = skb_put(skb, 1); | |
1111 | *crc = __fcs((void *) hdr); | |
1112 | } | |
1113 | ||
1114 | /* ---- RFCOMM frame reception ---- */ | |
8ff52f7d | 1115 | static struct rfcomm_session *rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci) |
1da177e4 LT |
1116 | { |
1117 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1118 | ||
1119 | if (dlci) { | |
1120 | /* Data channel */ | |
1121 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1122 | if (!d) { | |
1123 | rfcomm_send_dm(s, dlci); | |
8ff52f7d | 1124 | return s; |
1da177e4 LT |
1125 | } |
1126 | ||
1127 | switch (d->state) { | |
1128 | case BT_CONNECT: | |
1129 | rfcomm_dlc_clear_timer(d); | |
1130 | ||
1131 | rfcomm_dlc_lock(d); | |
1132 | d->state = BT_CONNECTED; | |
1133 | d->state_change(d, 0); | |
1134 | rfcomm_dlc_unlock(d); | |
1135 | ||
1136 | rfcomm_send_msc(s, 1, dlci, d->v24_sig); | |
1137 | break; | |
1138 | ||
1139 | case BT_DISCONN: | |
1140 | d->state = BT_CLOSED; | |
1141 | __rfcomm_dlc_close(d, 0); | |
9cf5b0ea MH |
1142 | |
1143 | if (list_empty(&s->dlcs)) { | |
1144 | s->state = BT_DISCONN; | |
1145 | rfcomm_send_disc(s, 0); | |
79e65478 | 1146 | rfcomm_session_clear_timer(s); |
9cf5b0ea MH |
1147 | } |
1148 | ||
1da177e4 LT |
1149 | break; |
1150 | } | |
1151 | } else { | |
1152 | /* Control channel */ | |
1153 | switch (s->state) { | |
1154 | case BT_CONNECT: | |
1155 | s->state = BT_CONNECTED; | |
1156 | rfcomm_process_connect(s); | |
1157 | break; | |
9cf5b0ea MH |
1158 | |
1159 | case BT_DISCONN: | |
8ff52f7d | 1160 | s = rfcomm_session_close(s, ECONNRESET); |
9cf5b0ea | 1161 | break; |
1da177e4 LT |
1162 | } |
1163 | } | |
8ff52f7d | 1164 | return s; |
1da177e4 LT |
1165 | } |
1166 | ||
8ff52f7d | 1167 | static struct rfcomm_session *rfcomm_recv_dm(struct rfcomm_session *s, u8 dlci) |
1da177e4 LT |
1168 | { |
1169 | int err = 0; | |
1170 | ||
1171 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1172 | ||
1173 | if (dlci) { | |
1174 | /* Data DLC */ | |
1175 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1176 | if (d) { | |
1177 | if (d->state == BT_CONNECT || d->state == BT_CONFIG) | |
1178 | err = ECONNREFUSED; | |
1179 | else | |
1180 | err = ECONNRESET; | |
1181 | ||
1182 | d->state = BT_CLOSED; | |
1183 | __rfcomm_dlc_close(d, err); | |
1184 | } | |
1185 | } else { | |
1186 | if (s->state == BT_CONNECT) | |
1187 | err = ECONNREFUSED; | |
1188 | else | |
1189 | err = ECONNRESET; | |
1190 | ||
8ff52f7d | 1191 | s = rfcomm_session_close(s, err); |
1da177e4 | 1192 | } |
8ff52f7d | 1193 | return s; |
1da177e4 LT |
1194 | } |
1195 | ||
8ff52f7d DJ |
1196 | static struct rfcomm_session *rfcomm_recv_disc(struct rfcomm_session *s, |
1197 | u8 dlci) | |
1da177e4 LT |
1198 | { |
1199 | int err = 0; | |
1200 | ||
1201 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1202 | ||
1203 | if (dlci) { | |
1204 | struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci); | |
1205 | if (d) { | |
1206 | rfcomm_send_ua(s, dlci); | |
1207 | ||
1208 | if (d->state == BT_CONNECT || d->state == BT_CONFIG) | |
1209 | err = ECONNREFUSED; | |
1210 | else | |
1211 | err = ECONNRESET; | |
1212 | ||
1213 | d->state = BT_CLOSED; | |
1214 | __rfcomm_dlc_close(d, err); | |
8e87d142 | 1215 | } else |
1da177e4 | 1216 | rfcomm_send_dm(s, dlci); |
8e87d142 | 1217 | |
1da177e4 LT |
1218 | } else { |
1219 | rfcomm_send_ua(s, 0); | |
1220 | ||
1221 | if (s->state == BT_CONNECT) | |
1222 | err = ECONNREFUSED; | |
1223 | else | |
1224 | err = ECONNRESET; | |
1225 | ||
8ff52f7d | 1226 | s = rfcomm_session_close(s, err); |
1da177e4 | 1227 | } |
8ff52f7d | 1228 | return s; |
1da177e4 LT |
1229 | } |
1230 | ||
bb23c0ab | 1231 | void rfcomm_dlc_accept(struct rfcomm_dlc *d) |
1da177e4 | 1232 | { |
300b9397 | 1233 | struct sock *sk = d->session->sock->sk; |
8c1d787b | 1234 | struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; |
300b9397 | 1235 | |
1da177e4 LT |
1236 | BT_DBG("dlc %p", d); |
1237 | ||
1238 | rfcomm_send_ua(d->session, d->dlci); | |
1239 | ||
e2139b32 JH |
1240 | rfcomm_dlc_clear_timer(d); |
1241 | ||
1da177e4 LT |
1242 | rfcomm_dlc_lock(d); |
1243 | d->state = BT_CONNECTED; | |
1244 | d->state_change(d, 0); | |
1245 | rfcomm_dlc_unlock(d); | |
1246 | ||
9f2c8a03 | 1247 | if (d->role_switch) |
8c1d787b | 1248 | hci_conn_switch_role(conn->hcon, 0x00); |
300b9397 | 1249 | |
1da177e4 LT |
1250 | rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); |
1251 | } | |
1252 | ||
bb23c0ab MH |
1253 | static void rfcomm_check_accept(struct rfcomm_dlc *d) |
1254 | { | |
9f2c8a03 | 1255 | if (rfcomm_check_security(d)) { |
bb23c0ab MH |
1256 | if (d->defer_setup) { |
1257 | set_bit(RFCOMM_DEFER_SETUP, &d->flags); | |
1258 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8bf47941 MH |
1259 | |
1260 | rfcomm_dlc_lock(d); | |
1261 | d->state = BT_CONNECT2; | |
1262 | d->state_change(d, 0); | |
1263 | rfcomm_dlc_unlock(d); | |
bb23c0ab MH |
1264 | } else |
1265 | rfcomm_dlc_accept(d); | |
8c1b2355 MH |
1266 | } else { |
1267 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); | |
1268 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
bb23c0ab MH |
1269 | } |
1270 | } | |
1271 | ||
1da177e4 LT |
1272 | static int rfcomm_recv_sabm(struct rfcomm_session *s, u8 dlci) |
1273 | { | |
1274 | struct rfcomm_dlc *d; | |
1275 | u8 channel; | |
1276 | ||
1277 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1278 | ||
1279 | if (!dlci) { | |
1280 | rfcomm_send_ua(s, 0); | |
1281 | ||
1282 | if (s->state == BT_OPEN) { | |
1283 | s->state = BT_CONNECTED; | |
1284 | rfcomm_process_connect(s); | |
1285 | } | |
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | /* Check if DLC exists */ | |
1290 | d = rfcomm_dlc_get(s, dlci); | |
1291 | if (d) { | |
1292 | if (d->state == BT_OPEN) { | |
1293 | /* DLC was previously opened by PN request */ | |
bb23c0ab | 1294 | rfcomm_check_accept(d); |
1da177e4 LT |
1295 | } |
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | /* Notify socket layer about incoming connection */ | |
1300 | channel = __srv_channel(dlci); | |
1301 | if (rfcomm_connect_ind(s, channel, &d)) { | |
1302 | d->dlci = dlci; | |
1303 | d->addr = __addr(s->initiator, dlci); | |
1304 | rfcomm_dlc_link(s, d); | |
1305 | ||
bb23c0ab | 1306 | rfcomm_check_accept(d); |
1da177e4 LT |
1307 | } else { |
1308 | rfcomm_send_dm(s, dlci); | |
1309 | } | |
1310 | ||
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static int rfcomm_apply_pn(struct rfcomm_dlc *d, int cr, struct rfcomm_pn *pn) | |
1315 | { | |
1316 | struct rfcomm_session *s = d->session; | |
1317 | ||
8e87d142 | 1318 | BT_DBG("dlc %p state %ld dlci %d mtu %d fc 0x%x credits %d", |
1da177e4 LT |
1319 | d, d->state, d->dlci, pn->mtu, pn->flow_ctrl, pn->credits); |
1320 | ||
7c2660b0 MH |
1321 | if ((pn->flow_ctrl == 0xf0 && s->cfc != RFCOMM_CFC_DISABLED) || |
1322 | pn->flow_ctrl == 0xe0) { | |
1323 | d->cfc = RFCOMM_CFC_ENABLED; | |
1da177e4 LT |
1324 | d->tx_credits = pn->credits; |
1325 | } else { | |
7c2660b0 | 1326 | d->cfc = RFCOMM_CFC_DISABLED; |
1da177e4 LT |
1327 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); |
1328 | } | |
1329 | ||
7c2660b0 MH |
1330 | if (s->cfc == RFCOMM_CFC_UNKNOWN) |
1331 | s->cfc = d->cfc; | |
1332 | ||
1da177e4 LT |
1333 | d->priority = pn->priority; |
1334 | ||
b4324b5d | 1335 | d->mtu = __le16_to_cpu(pn->mtu); |
98bcd08b MH |
1336 | |
1337 | if (cr && d->mtu > s->mtu) | |
1338 | d->mtu = s->mtu; | |
1da177e4 LT |
1339 | |
1340 | return 0; | |
1341 | } | |
1342 | ||
1343 | static int rfcomm_recv_pn(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1344 | { | |
1345 | struct rfcomm_pn *pn = (void *) skb->data; | |
1346 | struct rfcomm_dlc *d; | |
1347 | u8 dlci = pn->dlci; | |
1348 | ||
1349 | BT_DBG("session %p state %ld dlci %d", s, s->state, dlci); | |
1350 | ||
1351 | if (!dlci) | |
1352 | return 0; | |
1353 | ||
1354 | d = rfcomm_dlc_get(s, dlci); | |
1355 | if (d) { | |
1356 | if (cr) { | |
1357 | /* PN request */ | |
1358 | rfcomm_apply_pn(d, cr, pn); | |
1359 | rfcomm_send_pn(s, 0, d); | |
1360 | } else { | |
1361 | /* PN response */ | |
1362 | switch (d->state) { | |
1363 | case BT_CONFIG: | |
1364 | rfcomm_apply_pn(d, cr, pn); | |
1365 | ||
1366 | d->state = BT_CONNECT; | |
1367 | rfcomm_send_sabm(s, d->dlci); | |
1368 | break; | |
1369 | } | |
1370 | } | |
1371 | } else { | |
1372 | u8 channel = __srv_channel(dlci); | |
1373 | ||
1374 | if (!cr) | |
1375 | return 0; | |
1376 | ||
1377 | /* PN request for non existing DLC. | |
1378 | * Assume incoming connection. */ | |
1379 | if (rfcomm_connect_ind(s, channel, &d)) { | |
1380 | d->dlci = dlci; | |
1381 | d->addr = __addr(s->initiator, dlci); | |
1382 | rfcomm_dlc_link(s, d); | |
1383 | ||
1384 | rfcomm_apply_pn(d, cr, pn); | |
1385 | ||
1386 | d->state = BT_OPEN; | |
1387 | rfcomm_send_pn(s, 0, d); | |
1388 | } else { | |
1389 | rfcomm_send_dm(s, dlci); | |
1390 | } | |
1391 | } | |
1392 | return 0; | |
1393 | } | |
1394 | ||
1395 | static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_buff *skb) | |
1396 | { | |
1397 | struct rfcomm_rpn *rpn = (void *) skb->data; | |
1398 | u8 dlci = __get_dlci(rpn->dlci); | |
1399 | ||
1400 | u8 bit_rate = 0; | |
1401 | u8 data_bits = 0; | |
1402 | u8 stop_bits = 0; | |
1403 | u8 parity = 0; | |
1404 | u8 flow_ctrl = 0; | |
1405 | u8 xon_char = 0; | |
1406 | u8 xoff_char = 0; | |
1407 | u16 rpn_mask = RFCOMM_RPN_PM_ALL; | |
3a5e903c S |
1408 | |
1409 | BT_DBG("dlci %d cr %d len 0x%x bitr 0x%x line 0x%x flow 0x%x xonc 0x%x xoffc 0x%x pm 0x%x", | |
1410 | dlci, cr, len, rpn->bit_rate, rpn->line_settings, rpn->flow_ctrl, | |
1411 | rpn->xon_char, rpn->xoff_char, rpn->param_mask); | |
1412 | ||
1413 | if (!cr) | |
1da177e4 | 1414 | return 0; |
3a5e903c | 1415 | |
1da177e4 | 1416 | if (len == 1) { |
08601469 YK |
1417 | /* This is a request, return default (according to ETSI TS 07.10) settings */ |
1418 | bit_rate = RFCOMM_RPN_BR_9600; | |
1da177e4 LT |
1419 | data_bits = RFCOMM_RPN_DATA_8; |
1420 | stop_bits = RFCOMM_RPN_STOP_1; | |
1421 | parity = RFCOMM_RPN_PARITY_NONE; | |
1422 | flow_ctrl = RFCOMM_RPN_FLOW_NONE; | |
1423 | xon_char = RFCOMM_RPN_XON_CHAR; | |
1424 | xoff_char = RFCOMM_RPN_XOFF_CHAR; | |
1da177e4 LT |
1425 | goto rpn_out; |
1426 | } | |
3a5e903c S |
1427 | |
1428 | /* Check for sane values, ignore/accept bit_rate, 8 bits, 1 stop bit, | |
1429 | * no parity, no flow control lines, normal XON/XOFF chars */ | |
1430 | ||
e8db8c99 | 1431 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_BITRATE)) { |
1da177e4 | 1432 | bit_rate = rpn->bit_rate; |
08601469 | 1433 | if (bit_rate > RFCOMM_RPN_BR_230400) { |
1da177e4 | 1434 | BT_DBG("RPN bit rate mismatch 0x%x", bit_rate); |
08601469 | 1435 | bit_rate = RFCOMM_RPN_BR_9600; |
1da177e4 LT |
1436 | rpn_mask ^= RFCOMM_RPN_PM_BITRATE; |
1437 | } | |
1438 | } | |
3a5e903c | 1439 | |
e8db8c99 | 1440 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_DATA)) { |
1da177e4 LT |
1441 | data_bits = __get_rpn_data_bits(rpn->line_settings); |
1442 | if (data_bits != RFCOMM_RPN_DATA_8) { | |
1443 | BT_DBG("RPN data bits mismatch 0x%x", data_bits); | |
1444 | data_bits = RFCOMM_RPN_DATA_8; | |
1445 | rpn_mask ^= RFCOMM_RPN_PM_DATA; | |
1446 | } | |
1447 | } | |
3a5e903c | 1448 | |
e8db8c99 | 1449 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_STOP)) { |
1da177e4 LT |
1450 | stop_bits = __get_rpn_stop_bits(rpn->line_settings); |
1451 | if (stop_bits != RFCOMM_RPN_STOP_1) { | |
1452 | BT_DBG("RPN stop bits mismatch 0x%x", stop_bits); | |
1453 | stop_bits = RFCOMM_RPN_STOP_1; | |
1454 | rpn_mask ^= RFCOMM_RPN_PM_STOP; | |
1455 | } | |
1456 | } | |
3a5e903c | 1457 | |
e8db8c99 | 1458 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_PARITY)) { |
1da177e4 LT |
1459 | parity = __get_rpn_parity(rpn->line_settings); |
1460 | if (parity != RFCOMM_RPN_PARITY_NONE) { | |
1461 | BT_DBG("RPN parity mismatch 0x%x", parity); | |
1462 | parity = RFCOMM_RPN_PARITY_NONE; | |
1463 | rpn_mask ^= RFCOMM_RPN_PM_PARITY; | |
1464 | } | |
1465 | } | |
3a5e903c | 1466 | |
e8db8c99 | 1467 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_FLOW)) { |
1da177e4 LT |
1468 | flow_ctrl = rpn->flow_ctrl; |
1469 | if (flow_ctrl != RFCOMM_RPN_FLOW_NONE) { | |
1470 | BT_DBG("RPN flow ctrl mismatch 0x%x", flow_ctrl); | |
1471 | flow_ctrl = RFCOMM_RPN_FLOW_NONE; | |
1472 | rpn_mask ^= RFCOMM_RPN_PM_FLOW; | |
1473 | } | |
1474 | } | |
3a5e903c | 1475 | |
e8db8c99 | 1476 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XON)) { |
1da177e4 LT |
1477 | xon_char = rpn->xon_char; |
1478 | if (xon_char != RFCOMM_RPN_XON_CHAR) { | |
1479 | BT_DBG("RPN XON char mismatch 0x%x", xon_char); | |
1480 | xon_char = RFCOMM_RPN_XON_CHAR; | |
1481 | rpn_mask ^= RFCOMM_RPN_PM_XON; | |
1482 | } | |
1483 | } | |
3a5e903c | 1484 | |
e8db8c99 | 1485 | if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XOFF)) { |
1da177e4 LT |
1486 | xoff_char = rpn->xoff_char; |
1487 | if (xoff_char != RFCOMM_RPN_XOFF_CHAR) { | |
1488 | BT_DBG("RPN XOFF char mismatch 0x%x", xoff_char); | |
1489 | xoff_char = RFCOMM_RPN_XOFF_CHAR; | |
1490 | rpn_mask ^= RFCOMM_RPN_PM_XOFF; | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | rpn_out: | |
3a5e903c S |
1495 | rfcomm_send_rpn(s, 0, dlci, bit_rate, data_bits, stop_bits, |
1496 | parity, flow_ctrl, xon_char, xoff_char, rpn_mask); | |
1da177e4 LT |
1497 | |
1498 | return 0; | |
1499 | } | |
1500 | ||
1501 | static int rfcomm_recv_rls(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1502 | { | |
1503 | struct rfcomm_rls *rls = (void *) skb->data; | |
1504 | u8 dlci = __get_dlci(rls->dlci); | |
1505 | ||
1506 | BT_DBG("dlci %d cr %d status 0x%x", dlci, cr, rls->status); | |
3a5e903c | 1507 | |
1da177e4 LT |
1508 | if (!cr) |
1509 | return 0; | |
1510 | ||
3a5e903c S |
1511 | /* We should probably do something with this information here. But |
1512 | * for now it's sufficient just to reply -- Bluetooth 1.1 says it's | |
1513 | * mandatory to recognise and respond to RLS */ | |
1da177e4 LT |
1514 | |
1515 | rfcomm_send_rls(s, 0, dlci, rls->status); | |
1516 | ||
1517 | return 0; | |
1518 | } | |
1519 | ||
1520 | static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb) | |
1521 | { | |
1522 | struct rfcomm_msc *msc = (void *) skb->data; | |
1523 | struct rfcomm_dlc *d; | |
1524 | u8 dlci = __get_dlci(msc->dlci); | |
1525 | ||
1526 | BT_DBG("dlci %d cr %d v24 0x%x", dlci, cr, msc->v24_sig); | |
1527 | ||
1528 | d = rfcomm_dlc_get(s, dlci); | |
3a5e903c | 1529 | if (!d) |
1da177e4 LT |
1530 | return 0; |
1531 | ||
1532 | if (cr) { | |
1533 | if (msc->v24_sig & RFCOMM_V24_FC && !d->cfc) | |
1534 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1535 | else | |
1536 | clear_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
3a5e903c | 1537 | |
1da177e4 | 1538 | rfcomm_dlc_lock(d); |
8b6b3da7 MH |
1539 | |
1540 | d->remote_v24_sig = msc->v24_sig; | |
1541 | ||
1da177e4 LT |
1542 | if (d->modem_status) |
1543 | d->modem_status(d, msc->v24_sig); | |
8b6b3da7 | 1544 | |
1da177e4 | 1545 | rfcomm_dlc_unlock(d); |
8e87d142 | 1546 | |
1da177e4 LT |
1547 | rfcomm_send_msc(s, 0, dlci, msc->v24_sig); |
1548 | ||
1549 | d->mscex |= RFCOMM_MSCEX_RX; | |
3a5e903c | 1550 | } else |
1da177e4 LT |
1551 | d->mscex |= RFCOMM_MSCEX_TX; |
1552 | ||
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | static int rfcomm_recv_mcc(struct rfcomm_session *s, struct sk_buff *skb) | |
1557 | { | |
1558 | struct rfcomm_mcc *mcc = (void *) skb->data; | |
1559 | u8 type, cr, len; | |
1560 | ||
1561 | cr = __test_cr(mcc->type); | |
1562 | type = __get_mcc_type(mcc->type); | |
1563 | len = __get_mcc_len(mcc->len); | |
1564 | ||
1565 | BT_DBG("%p type 0x%x cr %d", s, type, cr); | |
1566 | ||
1567 | skb_pull(skb, 2); | |
1568 | ||
1569 | switch (type) { | |
1570 | case RFCOMM_PN: | |
1571 | rfcomm_recv_pn(s, cr, skb); | |
1572 | break; | |
1573 | ||
1574 | case RFCOMM_RPN: | |
1575 | rfcomm_recv_rpn(s, cr, len, skb); | |
1576 | break; | |
1577 | ||
1578 | case RFCOMM_RLS: | |
1579 | rfcomm_recv_rls(s, cr, skb); | |
1580 | break; | |
1581 | ||
1582 | case RFCOMM_MSC: | |
1583 | rfcomm_recv_msc(s, cr, skb); | |
1584 | break; | |
1585 | ||
1586 | case RFCOMM_FCOFF: | |
1587 | if (cr) { | |
1588 | set_bit(RFCOMM_TX_THROTTLED, &s->flags); | |
1589 | rfcomm_send_fcoff(s, 0); | |
1590 | } | |
1591 | break; | |
1592 | ||
1593 | case RFCOMM_FCON: | |
1594 | if (cr) { | |
1595 | clear_bit(RFCOMM_TX_THROTTLED, &s->flags); | |
1596 | rfcomm_send_fcon(s, 0); | |
1597 | } | |
1598 | break; | |
1599 | ||
1600 | case RFCOMM_TEST: | |
1601 | if (cr) | |
1602 | rfcomm_send_test(s, 0, skb->data, skb->len); | |
1603 | break; | |
1604 | ||
1605 | case RFCOMM_NSC: | |
1606 | break; | |
1607 | ||
1608 | default: | |
1609 | BT_ERR("Unknown control type 0x%02x", type); | |
1610 | rfcomm_send_nsc(s, cr, type); | |
1611 | break; | |
1612 | } | |
1613 | return 0; | |
1614 | } | |
1615 | ||
1616 | static int rfcomm_recv_data(struct rfcomm_session *s, u8 dlci, int pf, struct sk_buff *skb) | |
1617 | { | |
1618 | struct rfcomm_dlc *d; | |
1619 | ||
1620 | BT_DBG("session %p state %ld dlci %d pf %d", s, s->state, dlci, pf); | |
1621 | ||
1622 | d = rfcomm_dlc_get(s, dlci); | |
1623 | if (!d) { | |
1624 | rfcomm_send_dm(s, dlci); | |
1625 | goto drop; | |
1626 | } | |
1627 | ||
1628 | if (pf && d->cfc) { | |
1629 | u8 credits = *(u8 *) skb->data; skb_pull(skb, 1); | |
1630 | ||
1631 | d->tx_credits += credits; | |
1632 | if (d->tx_credits) | |
1633 | clear_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1634 | } | |
1635 | ||
1636 | if (skb->len && d->state == BT_CONNECTED) { | |
1637 | rfcomm_dlc_lock(d); | |
1638 | d->rx_credits--; | |
1639 | d->data_ready(d, skb); | |
1640 | rfcomm_dlc_unlock(d); | |
1641 | return 0; | |
1642 | } | |
1643 | ||
1644 | drop: | |
1645 | kfree_skb(skb); | |
1646 | return 0; | |
1647 | } | |
1648 | ||
8ff52f7d DJ |
1649 | static struct rfcomm_session *rfcomm_recv_frame(struct rfcomm_session *s, |
1650 | struct sk_buff *skb) | |
1da177e4 LT |
1651 | { |
1652 | struct rfcomm_hdr *hdr = (void *) skb->data; | |
1653 | u8 type, dlci, fcs; | |
1654 | ||
8ff52f7d DJ |
1655 | if (!s) { |
1656 | /* no session, so free socket data */ | |
1657 | kfree_skb(skb); | |
1658 | return s; | |
1659 | } | |
1660 | ||
1da177e4 LT |
1661 | dlci = __get_dlci(hdr->addr); |
1662 | type = __get_type(hdr->ctrl); | |
1663 | ||
1664 | /* Trim FCS */ | |
1665 | skb->len--; skb->tail--; | |
27a884dc | 1666 | fcs = *(u8 *)skb_tail_pointer(skb); |
1da177e4 LT |
1667 | |
1668 | if (__check_fcs(skb->data, type, fcs)) { | |
1669 | BT_ERR("bad checksum in packet"); | |
1670 | kfree_skb(skb); | |
8ff52f7d | 1671 | return s; |
1da177e4 LT |
1672 | } |
1673 | ||
1674 | if (__test_ea(hdr->len)) | |
1675 | skb_pull(skb, 3); | |
1676 | else | |
1677 | skb_pull(skb, 4); | |
1678 | ||
1679 | switch (type) { | |
1680 | case RFCOMM_SABM: | |
1681 | if (__test_pf(hdr->ctrl)) | |
1682 | rfcomm_recv_sabm(s, dlci); | |
1683 | break; | |
1684 | ||
1685 | case RFCOMM_DISC: | |
1686 | if (__test_pf(hdr->ctrl)) | |
8ff52f7d | 1687 | s = rfcomm_recv_disc(s, dlci); |
1da177e4 LT |
1688 | break; |
1689 | ||
1690 | case RFCOMM_UA: | |
1691 | if (__test_pf(hdr->ctrl)) | |
8ff52f7d | 1692 | s = rfcomm_recv_ua(s, dlci); |
1da177e4 LT |
1693 | break; |
1694 | ||
1695 | case RFCOMM_DM: | |
8ff52f7d | 1696 | s = rfcomm_recv_dm(s, dlci); |
1da177e4 LT |
1697 | break; |
1698 | ||
1699 | case RFCOMM_UIH: | |
8ff52f7d DJ |
1700 | if (dlci) { |
1701 | rfcomm_recv_data(s, dlci, __test_pf(hdr->ctrl), skb); | |
1702 | return s; | |
1703 | } | |
1da177e4 LT |
1704 | rfcomm_recv_mcc(s, skb); |
1705 | break; | |
1706 | ||
1707 | default: | |
5017d8dd | 1708 | BT_ERR("Unknown packet type 0x%02x", type); |
1da177e4 LT |
1709 | break; |
1710 | } | |
1711 | kfree_skb(skb); | |
8ff52f7d | 1712 | return s; |
1da177e4 LT |
1713 | } |
1714 | ||
1715 | /* ---- Connection and data processing ---- */ | |
1716 | ||
1717 | static void rfcomm_process_connect(struct rfcomm_session *s) | |
1718 | { | |
1719 | struct rfcomm_dlc *d; | |
1720 | struct list_head *p, *n; | |
1721 | ||
1722 | BT_DBG("session %p state %ld", s, s->state); | |
1723 | ||
1724 | list_for_each_safe(p, n, &s->dlcs) { | |
1725 | d = list_entry(p, struct rfcomm_dlc, list); | |
1726 | if (d->state == BT_CONFIG) { | |
1727 | d->mtu = s->mtu; | |
9f2c8a03 | 1728 | if (rfcomm_check_security(d)) { |
8c1b2355 MH |
1729 | rfcomm_send_pn(s, 1, d); |
1730 | } else { | |
77db1980 MH |
1731 | set_bit(RFCOMM_AUTH_PENDING, &d->flags); |
1732 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8c1b2355 | 1733 | } |
1da177e4 LT |
1734 | } |
1735 | } | |
1736 | } | |
1737 | ||
1738 | /* Send data queued for the DLC. | |
1739 | * Return number of frames left in the queue. | |
1740 | */ | |
6039aa73 | 1741 | static int rfcomm_process_tx(struct rfcomm_dlc *d) |
1da177e4 LT |
1742 | { |
1743 | struct sk_buff *skb; | |
1744 | int err; | |
1745 | ||
8e87d142 | 1746 | BT_DBG("dlc %p state %ld cfc %d rx_credits %d tx_credits %d", |
1da177e4 LT |
1747 | d, d->state, d->cfc, d->rx_credits, d->tx_credits); |
1748 | ||
1749 | /* Send pending MSC */ | |
1750 | if (test_and_clear_bit(RFCOMM_MSC_PENDING, &d->flags)) | |
8e87d142 | 1751 | rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); |
1da177e4 LT |
1752 | |
1753 | if (d->cfc) { | |
8e87d142 | 1754 | /* CFC enabled. |
1da177e4 LT |
1755 | * Give them some credits */ |
1756 | if (!test_bit(RFCOMM_RX_THROTTLED, &d->flags) && | |
8e87d142 | 1757 | d->rx_credits <= (d->cfc >> 2)) { |
1da177e4 LT |
1758 | rfcomm_send_credits(d->session, d->addr, d->cfc - d->rx_credits); |
1759 | d->rx_credits = d->cfc; | |
1760 | } | |
1761 | } else { | |
1762 | /* CFC disabled. | |
1763 | * Give ourselves some credits */ | |
1764 | d->tx_credits = 5; | |
1765 | } | |
1766 | ||
1767 | if (test_bit(RFCOMM_TX_THROTTLED, &d->flags)) | |
1768 | return skb_queue_len(&d->tx_queue); | |
1769 | ||
1770 | while (d->tx_credits && (skb = skb_dequeue(&d->tx_queue))) { | |
5436538f | 1771 | err = rfcomm_send_frame(d->session, skb->data, skb->len); |
1da177e4 LT |
1772 | if (err < 0) { |
1773 | skb_queue_head(&d->tx_queue, skb); | |
1774 | break; | |
1775 | } | |
1776 | kfree_skb(skb); | |
1777 | d->tx_credits--; | |
1778 | } | |
1779 | ||
1780 | if (d->cfc && !d->tx_credits) { | |
1781 | /* We're out of TX credits. | |
1782 | * Set TX_THROTTLED flag to avoid unnesary wakeups by dlc_send. */ | |
1783 | set_bit(RFCOMM_TX_THROTTLED, &d->flags); | |
1784 | } | |
1785 | ||
1786 | return skb_queue_len(&d->tx_queue); | |
1787 | } | |
1788 | ||
6039aa73 | 1789 | static void rfcomm_process_dlcs(struct rfcomm_session *s) |
1da177e4 LT |
1790 | { |
1791 | struct rfcomm_dlc *d; | |
1792 | struct list_head *p, *n; | |
1793 | ||
1794 | BT_DBG("session %p state %ld", s, s->state); | |
1795 | ||
1796 | list_for_each_safe(p, n, &s->dlcs) { | |
1797 | d = list_entry(p, struct rfcomm_dlc, list); | |
1798 | ||
1799 | if (test_bit(RFCOMM_TIMED_OUT, &d->flags)) { | |
1800 | __rfcomm_dlc_close(d, ETIMEDOUT); | |
1801 | continue; | |
1802 | } | |
1803 | ||
db54467a SJ |
1804 | if (test_bit(RFCOMM_ENC_DROP, &d->flags)) { |
1805 | __rfcomm_dlc_close(d, ECONNREFUSED); | |
1806 | continue; | |
1807 | } | |
1808 | ||
1da177e4 LT |
1809 | if (test_and_clear_bit(RFCOMM_AUTH_ACCEPT, &d->flags)) { |
1810 | rfcomm_dlc_clear_timer(d); | |
77db1980 MH |
1811 | if (d->out) { |
1812 | rfcomm_send_pn(s, 1, d); | |
1813 | rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT); | |
bb23c0ab MH |
1814 | } else { |
1815 | if (d->defer_setup) { | |
1816 | set_bit(RFCOMM_DEFER_SETUP, &d->flags); | |
1817 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
8bf47941 MH |
1818 | |
1819 | rfcomm_dlc_lock(d); | |
1820 | d->state = BT_CONNECT2; | |
1821 | d->state_change(d, 0); | |
1822 | rfcomm_dlc_unlock(d); | |
bb23c0ab MH |
1823 | } else |
1824 | rfcomm_dlc_accept(d); | |
1825 | } | |
1da177e4 LT |
1826 | continue; |
1827 | } else if (test_and_clear_bit(RFCOMM_AUTH_REJECT, &d->flags)) { | |
1828 | rfcomm_dlc_clear_timer(d); | |
77db1980 MH |
1829 | if (!d->out) |
1830 | rfcomm_send_dm(s, d->dlci); | |
1831 | else | |
1832 | d->state = BT_CLOSED; | |
1da177e4 LT |
1833 | __rfcomm_dlc_close(d, ECONNREFUSED); |
1834 | continue; | |
1835 | } | |
1836 | ||
6e1031a4 JG |
1837 | if (test_bit(RFCOMM_SEC_PENDING, &d->flags)) |
1838 | continue; | |
1839 | ||
1da177e4 LT |
1840 | if (test_bit(RFCOMM_TX_THROTTLED, &s->flags)) |
1841 | continue; | |
1842 | ||
1843 | if ((d->state == BT_CONNECTED || d->state == BT_DISCONN) && | |
77db1980 | 1844 | d->mscex == RFCOMM_MSCEX_OK) |
1da177e4 LT |
1845 | rfcomm_process_tx(d); |
1846 | } | |
1847 | } | |
1848 | ||
8ff52f7d | 1849 | static struct rfcomm_session *rfcomm_process_rx(struct rfcomm_session *s) |
1da177e4 LT |
1850 | { |
1851 | struct socket *sock = s->sock; | |
1852 | struct sock *sk = sock->sk; | |
1853 | struct sk_buff *skb; | |
1854 | ||
1855 | BT_DBG("session %p state %ld qlen %d", s, s->state, skb_queue_len(&sk->sk_receive_queue)); | |
1856 | ||
1857 | /* Get data directly from socket receive queue without copying it. */ | |
1858 | while ((skb = skb_dequeue(&sk->sk_receive_queue))) { | |
1859 | skb_orphan(skb); | |
44935720 | 1860 | if (!skb_linearize(skb)) |
8ff52f7d | 1861 | s = rfcomm_recv_frame(s, skb); |
44935720 MM |
1862 | else |
1863 | kfree_skb(skb); | |
1da177e4 LT |
1864 | } |
1865 | ||
08c30aca DJ |
1866 | if (s && (sk->sk_state == BT_CLOSED)) |
1867 | s = rfcomm_session_close(s, sk->sk_err); | |
8ff52f7d DJ |
1868 | |
1869 | return s; | |
1da177e4 LT |
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) { | |
98bcd08b MH |
1894 | /* We should adjust MTU on incoming sessions. |
1895 | * L2CAP MTU minus UIH header and FCS. */ | |
0c1bc5c6 GP |
1896 | s->mtu = min(l2cap_pi(nsock->sk)->chan->omtu, |
1897 | l2cap_pi(nsock->sk)->chan->imtu) - 5; | |
98bcd08b | 1898 | |
534c92fd | 1899 | rfcomm_schedule(); |
1da177e4 LT |
1900 | } else |
1901 | sock_release(nsock); | |
1902 | } | |
1903 | ||
8ff52f7d | 1904 | static struct rfcomm_session *rfcomm_check_connection(struct rfcomm_session *s) |
1da177e4 LT |
1905 | { |
1906 | struct sock *sk = s->sock->sk; | |
1907 | ||
1908 | BT_DBG("%p state %ld", s, s->state); | |
1909 | ||
285b4e90 | 1910 | switch (sk->sk_state) { |
1da177e4 LT |
1911 | case BT_CONNECTED: |
1912 | s->state = BT_CONNECT; | |
1913 | ||
1914 | /* We can adjust MTU on outgoing sessions. | |
1915 | * L2CAP MTU minus UIH header and FCS. */ | |
0c1bc5c6 | 1916 | s->mtu = min(l2cap_pi(sk)->chan->omtu, l2cap_pi(sk)->chan->imtu) - 5; |
1da177e4 LT |
1917 | |
1918 | rfcomm_send_sabm(s, 0); | |
1919 | break; | |
1920 | ||
1921 | case BT_CLOSED: | |
8ff52f7d | 1922 | s = rfcomm_session_close(s, sk->sk_err); |
1da177e4 LT |
1923 | break; |
1924 | } | |
8ff52f7d | 1925 | return s; |
1da177e4 LT |
1926 | } |
1927 | ||
6039aa73 | 1928 | static void rfcomm_process_sessions(void) |
1da177e4 LT |
1929 | { |
1930 | struct list_head *p, *n; | |
1931 | ||
1932 | rfcomm_lock(); | |
1933 | ||
1934 | list_for_each_safe(p, n, &session_list) { | |
1935 | struct rfcomm_session *s; | |
1936 | s = list_entry(p, struct rfcomm_session, list); | |
1937 | ||
9e726b17 LAD |
1938 | if (test_and_clear_bit(RFCOMM_TIMED_OUT, &s->flags)) { |
1939 | s->state = BT_DISCONN; | |
1940 | rfcomm_send_disc(s, 0); | |
1941 | continue; | |
1942 | } | |
1943 | ||
1da177e4 LT |
1944 | if (s->state == BT_LISTEN) { |
1945 | rfcomm_accept_connection(s); | |
1946 | continue; | |
1947 | } | |
1948 | ||
1da177e4 LT |
1949 | switch (s->state) { |
1950 | case BT_BOUND: | |
8ff52f7d | 1951 | s = rfcomm_check_connection(s); |
1da177e4 LT |
1952 | break; |
1953 | ||
1954 | default: | |
8ff52f7d | 1955 | s = rfcomm_process_rx(s); |
1da177e4 LT |
1956 | break; |
1957 | } | |
1958 | ||
8ff52f7d DJ |
1959 | if (s) |
1960 | rfcomm_process_dlcs(s); | |
1da177e4 LT |
1961 | } |
1962 | ||
1963 | rfcomm_unlock(); | |
1964 | } | |
1965 | ||
1da177e4 LT |
1966 | static int rfcomm_add_listener(bdaddr_t *ba) |
1967 | { | |
1968 | struct sockaddr_l2 addr; | |
1969 | struct socket *sock; | |
1970 | struct sock *sk; | |
1971 | struct rfcomm_session *s; | |
1972 | int err = 0; | |
1973 | ||
1974 | /* Create socket */ | |
1975 | err = rfcomm_l2sock_create(&sock); | |
8e87d142 | 1976 | if (err < 0) { |
1da177e4 LT |
1977 | BT_ERR("Create socket failed %d", err); |
1978 | return err; | |
1979 | } | |
1980 | ||
1981 | /* Bind socket */ | |
1982 | bacpy(&addr.l2_bdaddr, ba); | |
1983 | addr.l2_family = AF_BLUETOOTH; | |
5bcb8094 | 1984 | addr.l2_psm = __constant_cpu_to_le16(RFCOMM_PSM); |
37e62f55 | 1985 | addr.l2_cid = 0; |
48db9ca4 | 1986 | err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr)); |
1da177e4 LT |
1987 | if (err < 0) { |
1988 | BT_ERR("Bind failed %d", err); | |
1989 | goto failed; | |
1990 | } | |
1991 | ||
1992 | /* Set L2CAP options */ | |
1993 | sk = sock->sk; | |
1994 | lock_sock(sk); | |
0c1bc5c6 | 1995 | l2cap_pi(sk)->chan->imtu = l2cap_mtu; |
1da177e4 LT |
1996 | release_sock(sk); |
1997 | ||
1998 | /* Start listening on the socket */ | |
48db9ca4 | 1999 | err = kernel_listen(sock, 10); |
1da177e4 LT |
2000 | if (err) { |
2001 | BT_ERR("Listen failed %d", err); | |
2002 | goto failed; | |
2003 | } | |
2004 | ||
2005 | /* Add listening session */ | |
2006 | s = rfcomm_session_add(sock, BT_LISTEN); | |
0227c7b5 WY |
2007 | if (!s) { |
2008 | err = -ENOMEM; | |
1da177e4 | 2009 | goto failed; |
0227c7b5 | 2010 | } |
1da177e4 | 2011 | |
1da177e4 LT |
2012 | return 0; |
2013 | failed: | |
2014 | sock_release(sock); | |
2015 | return err; | |
2016 | } | |
2017 | ||
2018 | static void rfcomm_kill_listener(void) | |
2019 | { | |
2020 | struct rfcomm_session *s; | |
2021 | struct list_head *p, *n; | |
2022 | ||
2023 | BT_DBG(""); | |
2024 | ||
2025 | list_for_each_safe(p, n, &session_list) { | |
2026 | s = list_entry(p, struct rfcomm_session, list); | |
2027 | rfcomm_session_del(s); | |
2028 | } | |
2029 | } | |
2030 | ||
2031 | static int rfcomm_run(void *unused) | |
2032 | { | |
a524eccc | 2033 | BT_DBG(""); |
1da177e4 | 2034 | |
1da177e4 | 2035 | set_user_nice(current, -10); |
1da177e4 | 2036 | |
1da177e4 LT |
2037 | rfcomm_add_listener(BDADDR_ANY); |
2038 | ||
e5842cdb | 2039 | while (1) { |
a524eccc | 2040 | set_current_state(TASK_INTERRUPTIBLE); |
e5842cdb PH |
2041 | |
2042 | if (kthread_should_stop()) | |
2043 | break; | |
a524eccc MH |
2044 | |
2045 | /* Process stuff */ | |
a524eccc | 2046 | rfcomm_process_sessions(); |
e5842cdb PH |
2047 | |
2048 | schedule(); | |
a524eccc | 2049 | } |
e5842cdb | 2050 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
2051 | |
2052 | rfcomm_kill_listener(); | |
2053 | ||
1da177e4 LT |
2054 | return 0; |
2055 | } | |
2056 | ||
8c1b2355 | 2057 | static void rfcomm_security_cfm(struct hci_conn *conn, u8 status, u8 encrypt) |
1da177e4 LT |
2058 | { |
2059 | struct rfcomm_session *s; | |
2060 | struct rfcomm_dlc *d; | |
2061 | struct list_head *p, *n; | |
2062 | ||
2063 | BT_DBG("conn %p status 0x%02x encrypt 0x%02x", conn, status, encrypt); | |
2064 | ||
2065 | s = rfcomm_session_get(&conn->hdev->bdaddr, &conn->dst); | |
2066 | if (!s) | |
2067 | return; | |
2068 | ||
1da177e4 LT |
2069 | list_for_each_safe(p, n, &s->dlcs) { |
2070 | d = list_entry(p, struct rfcomm_dlc, list); | |
2071 | ||
8c84b830 MH |
2072 | if (test_and_clear_bit(RFCOMM_SEC_PENDING, &d->flags)) { |
2073 | rfcomm_dlc_clear_timer(d); | |
2074 | if (status || encrypt == 0x00) { | |
db54467a | 2075 | set_bit(RFCOMM_ENC_DROP, &d->flags); |
8c84b830 MH |
2076 | continue; |
2077 | } | |
2078 | } | |
2079 | ||
2080 | if (d->state == BT_CONNECTED && !status && encrypt == 0x00) { | |
2081 | if (d->sec_level == BT_SECURITY_MEDIUM) { | |
2082 | set_bit(RFCOMM_SEC_PENDING, &d->flags); | |
2083 | rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); | |
2084 | continue; | |
2085 | } else if (d->sec_level == BT_SECURITY_HIGH) { | |
db54467a | 2086 | set_bit(RFCOMM_ENC_DROP, &d->flags); |
8c84b830 MH |
2087 | continue; |
2088 | } | |
9719f8af MH |
2089 | } |
2090 | ||
1da177e4 LT |
2091 | if (!test_and_clear_bit(RFCOMM_AUTH_PENDING, &d->flags)) |
2092 | continue; | |
2093 | ||
b3b1b061 | 2094 | if (!status && hci_conn_check_secure(conn, d->sec_level)) |
1da177e4 LT |
2095 | set_bit(RFCOMM_AUTH_ACCEPT, &d->flags); |
2096 | else | |
2097 | set_bit(RFCOMM_AUTH_REJECT, &d->flags); | |
2098 | } | |
2099 | ||
534c92fd | 2100 | rfcomm_schedule(); |
1da177e4 LT |
2101 | } |
2102 | ||
2103 | static struct hci_cb rfcomm_cb = { | |
2104 | .name = "RFCOMM", | |
8c1b2355 | 2105 | .security_cfm = rfcomm_security_cfm |
1da177e4 LT |
2106 | }; |
2107 | ||
aef7d97c | 2108 | static int rfcomm_dlc_debugfs_show(struct seq_file *f, void *x) |
1da177e4 LT |
2109 | { |
2110 | struct rfcomm_session *s; | |
1da177e4 LT |
2111 | |
2112 | rfcomm_lock(); | |
2113 | ||
8035ded4 LAD |
2114 | list_for_each_entry(s, &session_list, list) { |
2115 | struct rfcomm_dlc *d; | |
2116 | list_for_each_entry(d, &s->dlcs, list) { | |
be9d1227 | 2117 | struct sock *sk = s->sock->sk; |
1da177e4 | 2118 | |
fcb73338 AE |
2119 | seq_printf(f, "%pMR %pMR %ld %d %d %d %d\n", |
2120 | &bt_sk(sk)->src, &bt_sk(sk)->dst, | |
2121 | d->state, d->dlci, d->mtu, | |
2122 | d->rx_credits, d->tx_credits); | |
1da177e4 LT |
2123 | } |
2124 | } | |
1da177e4 | 2125 | |
1da177e4 | 2126 | rfcomm_unlock(); |
1da177e4 | 2127 | |
aef7d97c MH |
2128 | return 0; |
2129 | } | |
2130 | ||
2131 | static int rfcomm_dlc_debugfs_open(struct inode *inode, struct file *file) | |
2132 | { | |
2133 | return single_open(file, rfcomm_dlc_debugfs_show, inode->i_private); | |
1da177e4 LT |
2134 | } |
2135 | ||
aef7d97c MH |
2136 | static const struct file_operations rfcomm_dlc_debugfs_fops = { |
2137 | .open = rfcomm_dlc_debugfs_open, | |
2138 | .read = seq_read, | |
2139 | .llseek = seq_lseek, | |
2140 | .release = single_release, | |
2141 | }; | |
2142 | ||
2143 | static struct dentry *rfcomm_dlc_debugfs; | |
1da177e4 LT |
2144 | |
2145 | /* ---- Initialization ---- */ | |
2146 | static int __init rfcomm_init(void) | |
2147 | { | |
52d18347 | 2148 | int err; |
af0d3b10 | 2149 | |
1da177e4 LT |
2150 | hci_register_cb(&rfcomm_cb); |
2151 | ||
a524eccc MH |
2152 | rfcomm_thread = kthread_run(rfcomm_run, NULL, "krfcommd"); |
2153 | if (IS_ERR(rfcomm_thread)) { | |
52d18347 MH |
2154 | err = PTR_ERR(rfcomm_thread); |
2155 | goto unregister; | |
a524eccc | 2156 | } |
1da177e4 | 2157 | |
aef7d97c MH |
2158 | if (bt_debugfs) { |
2159 | rfcomm_dlc_debugfs = debugfs_create_file("rfcomm_dlc", 0444, | |
2160 | bt_debugfs, NULL, &rfcomm_dlc_debugfs_fops); | |
2161 | if (!rfcomm_dlc_debugfs) | |
2162 | BT_ERR("Failed to create RFCOMM debug file"); | |
2163 | } | |
1da177e4 | 2164 | |
52d18347 MH |
2165 | err = rfcomm_init_ttys(); |
2166 | if (err < 0) | |
2167 | goto stop; | |
1da177e4 | 2168 | |
52d18347 MH |
2169 | err = rfcomm_init_sockets(); |
2170 | if (err < 0) | |
2171 | goto cleanup; | |
1da177e4 | 2172 | |
be9d1227 MH |
2173 | BT_INFO("RFCOMM ver %s", VERSION); |
2174 | ||
1da177e4 | 2175 | return 0; |
af0d3b10 | 2176 | |
52d18347 | 2177 | cleanup: |
af0d3b10 | 2178 | rfcomm_cleanup_ttys(); |
52d18347 MH |
2179 | |
2180 | stop: | |
af0d3b10 | 2181 | kthread_stop(rfcomm_thread); |
52d18347 MH |
2182 | |
2183 | unregister: | |
af0d3b10 DY |
2184 | hci_unregister_cb(&rfcomm_cb); |
2185 | ||
52d18347 | 2186 | return err; |
1da177e4 LT |
2187 | } |
2188 | ||
2189 | static void __exit rfcomm_exit(void) | |
2190 | { | |
aef7d97c | 2191 | debugfs_remove(rfcomm_dlc_debugfs); |
be9d1227 | 2192 | |
1da177e4 LT |
2193 | hci_unregister_cb(&rfcomm_cb); |
2194 | ||
a524eccc | 2195 | kthread_stop(rfcomm_thread); |
1da177e4 | 2196 | |
1da177e4 | 2197 | rfcomm_cleanup_ttys(); |
1da177e4 LT |
2198 | |
2199 | rfcomm_cleanup_sockets(); | |
1da177e4 LT |
2200 | } |
2201 | ||
2202 | module_init(rfcomm_init); | |
2203 | module_exit(rfcomm_exit); | |
2204 | ||
7c2660b0 MH |
2205 | module_param(disable_cfc, bool, 0644); |
2206 | MODULE_PARM_DESC(disable_cfc, "Disable credit based flow control"); | |
2207 | ||
98bcd08b MH |
2208 | module_param(channel_mtu, int, 0644); |
2209 | MODULE_PARM_DESC(channel_mtu, "Default MTU for the RFCOMM channel"); | |
2210 | ||
56f3a40a MH |
2211 | module_param(l2cap_mtu, uint, 0644); |
2212 | MODULE_PARM_DESC(l2cap_mtu, "Default MTU for the L2CAP connection"); | |
2213 | ||
eae38eed MH |
2214 | module_param(l2cap_ertm, bool, 0644); |
2215 | MODULE_PARM_DESC(l2cap_ertm, "Use L2CAP ERTM mode for connection"); | |
2216 | ||
63fbd24e | 2217 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
2218 | MODULE_DESCRIPTION("Bluetooth RFCOMM ver " VERSION); |
2219 | MODULE_VERSION(VERSION); | |
2220 | MODULE_LICENSE("GPL"); | |
2221 | MODULE_ALIAS("bt-proto-3"); |