Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
19 | ||
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
22 | SOFTWARE IS DISCLAIMED. | |
23 | */ | |
24 | ||
25 | /* Bluetooth L2CAP core and sockets. */ | |
26 | ||
27 | #include <linux/config.h> | |
28 | #include <linux/module.h> | |
29 | ||
30 | #include <linux/types.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/major.h> | |
34 | #include <linux/sched.h> | |
35 | #include <linux/slab.h> | |
36 | #include <linux/poll.h> | |
37 | #include <linux/fcntl.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/interrupt.h> | |
40 | #include <linux/socket.h> | |
41 | #include <linux/skbuff.h> | |
42 | #include <linux/proc_fs.h> | |
43 | #include <linux/seq_file.h> | |
44 | #include <linux/list.h> | |
45 | #include <net/sock.h> | |
46 | ||
47 | #include <asm/system.h> | |
48 | #include <asm/uaccess.h> | |
49 | #include <asm/unaligned.h> | |
50 | ||
51 | #include <net/bluetooth/bluetooth.h> | |
52 | #include <net/bluetooth/hci_core.h> | |
53 | #include <net/bluetooth/l2cap.h> | |
54 | ||
55 | #ifndef CONFIG_BT_L2CAP_DEBUG | |
56 | #undef BT_DBG | |
57 | #define BT_DBG(D...) | |
58 | #endif | |
59 | ||
60 | #define VERSION "2.7" | |
61 | ||
62 | static struct proto_ops l2cap_sock_ops; | |
63 | ||
64 | static struct bt_sock_list l2cap_sk_list = { | |
65 | .lock = RW_LOCK_UNLOCKED | |
66 | }; | |
67 | ||
68 | static int l2cap_conn_del(struct hci_conn *conn, int err); | |
69 | ||
70 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent); | |
71 | static void l2cap_chan_del(struct sock *sk, int err); | |
72 | ||
73 | static void __l2cap_sock_close(struct sock *sk, int reason); | |
74 | static void l2cap_sock_close(struct sock *sk); | |
75 | static void l2cap_sock_kill(struct sock *sk); | |
76 | ||
77 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
78 | u8 code, u8 ident, u16 dlen, void *data); | |
79 | ||
80 | /* ---- L2CAP timers ---- */ | |
81 | static void l2cap_sock_timeout(unsigned long arg) | |
82 | { | |
83 | struct sock *sk = (struct sock *) arg; | |
84 | ||
85 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
86 | ||
87 | bh_lock_sock(sk); | |
88 | __l2cap_sock_close(sk, ETIMEDOUT); | |
89 | bh_unlock_sock(sk); | |
90 | ||
91 | l2cap_sock_kill(sk); | |
92 | sock_put(sk); | |
93 | } | |
94 | ||
95 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
96 | { | |
97 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
98 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
99 | } | |
100 | ||
101 | static void l2cap_sock_clear_timer(struct sock *sk) | |
102 | { | |
103 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
104 | sk_stop_timer(sk, &sk->sk_timer); | |
105 | } | |
106 | ||
107 | static void l2cap_sock_init_timer(struct sock *sk) | |
108 | { | |
109 | init_timer(&sk->sk_timer); | |
110 | sk->sk_timer.function = l2cap_sock_timeout; | |
111 | sk->sk_timer.data = (unsigned long)sk; | |
112 | } | |
113 | ||
114 | /* ---- L2CAP connections ---- */ | |
115 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) | |
116 | { | |
117 | struct l2cap_conn *conn; | |
118 | ||
119 | if ((conn = hcon->l2cap_data)) | |
120 | return conn; | |
121 | ||
122 | if (status) | |
123 | return conn; | |
124 | ||
125 | if (!(conn = kmalloc(sizeof(struct l2cap_conn), GFP_ATOMIC))) | |
126 | return NULL; | |
127 | memset(conn, 0, sizeof(struct l2cap_conn)); | |
128 | ||
129 | hcon->l2cap_data = conn; | |
130 | conn->hcon = hcon; | |
131 | ||
132 | conn->mtu = hcon->hdev->acl_mtu; | |
133 | conn->src = &hcon->hdev->bdaddr; | |
134 | conn->dst = &hcon->dst; | |
135 | ||
136 | spin_lock_init(&conn->lock); | |
137 | rwlock_init(&conn->chan_list.lock); | |
138 | ||
139 | BT_DBG("hcon %p conn %p", hcon, conn); | |
140 | return conn; | |
141 | } | |
142 | ||
143 | static int l2cap_conn_del(struct hci_conn *hcon, int err) | |
144 | { | |
145 | struct l2cap_conn *conn; | |
146 | struct sock *sk; | |
147 | ||
148 | if (!(conn = hcon->l2cap_data)) | |
149 | return 0; | |
150 | ||
151 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
152 | ||
153 | if (conn->rx_skb) | |
154 | kfree_skb(conn->rx_skb); | |
155 | ||
156 | /* Kill channels */ | |
157 | while ((sk = conn->chan_list.head)) { | |
158 | bh_lock_sock(sk); | |
159 | l2cap_chan_del(sk, err); | |
160 | bh_unlock_sock(sk); | |
161 | l2cap_sock_kill(sk); | |
162 | } | |
163 | ||
164 | hcon->l2cap_data = NULL; | |
165 | kfree(conn); | |
166 | return 0; | |
167 | } | |
168 | ||
169 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
170 | { | |
171 | struct l2cap_chan_list *l = &conn->chan_list; | |
172 | write_lock(&l->lock); | |
173 | __l2cap_chan_add(conn, sk, parent); | |
174 | write_unlock(&l->lock); | |
175 | } | |
176 | ||
177 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) | |
178 | { | |
179 | u8 id; | |
180 | ||
181 | /* Get next available identificator. | |
182 | * 1 - 128 are used by kernel. | |
183 | * 129 - 199 are reserved. | |
184 | * 200 - 254 are used by utilities like l2ping, etc. | |
185 | */ | |
186 | ||
187 | spin_lock(&conn->lock); | |
188 | ||
189 | if (++conn->tx_ident > 128) | |
190 | conn->tx_ident = 1; | |
191 | ||
192 | id = conn->tx_ident; | |
193 | ||
194 | spin_unlock(&conn->lock); | |
195 | ||
196 | return id; | |
197 | } | |
198 | ||
199 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) | |
200 | { | |
201 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
202 | ||
203 | BT_DBG("code 0x%2.2x", code); | |
204 | ||
205 | if (!skb) | |
206 | return -ENOMEM; | |
207 | ||
208 | return hci_send_acl(conn->hcon, skb, 0); | |
209 | } | |
210 | ||
211 | /* ---- Socket interface ---- */ | |
212 | static struct sock *__l2cap_get_sock_by_addr(u16 psm, bdaddr_t *src) | |
213 | { | |
214 | struct sock *sk; | |
215 | struct hlist_node *node; | |
216 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
217 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
218 | goto found; | |
219 | sk = NULL; | |
220 | found: | |
221 | return sk; | |
222 | } | |
223 | ||
224 | /* Find socket with psm and source bdaddr. | |
225 | * Returns closest match. | |
226 | */ | |
227 | static struct sock *__l2cap_get_sock_by_psm(int state, u16 psm, bdaddr_t *src) | |
228 | { | |
229 | struct sock *sk = NULL, *sk1 = NULL; | |
230 | struct hlist_node *node; | |
231 | ||
232 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
233 | if (state && sk->sk_state != state) | |
234 | continue; | |
235 | ||
236 | if (l2cap_pi(sk)->psm == psm) { | |
237 | /* Exact match. */ | |
238 | if (!bacmp(&bt_sk(sk)->src, src)) | |
239 | break; | |
240 | ||
241 | /* Closest match */ | |
242 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
243 | sk1 = sk; | |
244 | } | |
245 | } | |
246 | return node ? sk : sk1; | |
247 | } | |
248 | ||
249 | /* Find socket with given address (psm, src). | |
250 | * Returns locked socket */ | |
251 | static inline struct sock *l2cap_get_sock_by_psm(int state, u16 psm, bdaddr_t *src) | |
252 | { | |
253 | struct sock *s; | |
254 | read_lock(&l2cap_sk_list.lock); | |
255 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
256 | if (s) bh_lock_sock(s); | |
257 | read_unlock(&l2cap_sk_list.lock); | |
258 | return s; | |
259 | } | |
260 | ||
261 | static void l2cap_sock_destruct(struct sock *sk) | |
262 | { | |
263 | BT_DBG("sk %p", sk); | |
264 | ||
265 | skb_queue_purge(&sk->sk_receive_queue); | |
266 | skb_queue_purge(&sk->sk_write_queue); | |
267 | } | |
268 | ||
269 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
270 | { | |
271 | struct sock *sk; | |
272 | ||
273 | BT_DBG("parent %p", parent); | |
274 | ||
275 | /* Close not yet accepted channels */ | |
276 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
277 | l2cap_sock_close(sk); | |
278 | ||
279 | parent->sk_state = BT_CLOSED; | |
280 | sock_set_flag(parent, SOCK_ZAPPED); | |
281 | } | |
282 | ||
283 | /* Kill socket (only if zapped and orphan) | |
284 | * Must be called on unlocked socket. | |
285 | */ | |
286 | static void l2cap_sock_kill(struct sock *sk) | |
287 | { | |
288 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
289 | return; | |
290 | ||
291 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
292 | ||
293 | /* Kill poor orphan */ | |
294 | bt_sock_unlink(&l2cap_sk_list, sk); | |
295 | sock_set_flag(sk, SOCK_DEAD); | |
296 | sock_put(sk); | |
297 | } | |
298 | ||
299 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
300 | { | |
301 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
302 | ||
303 | switch (sk->sk_state) { | |
304 | case BT_LISTEN: | |
305 | l2cap_sock_cleanup_listen(sk); | |
306 | break; | |
307 | ||
308 | case BT_CONNECTED: | |
309 | case BT_CONFIG: | |
310 | case BT_CONNECT2: | |
311 | if (sk->sk_type == SOCK_SEQPACKET) { | |
312 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
313 | struct l2cap_disconn_req req; | |
314 | ||
315 | sk->sk_state = BT_DISCONN; | |
316 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
317 | ||
318 | req.dcid = __cpu_to_le16(l2cap_pi(sk)->dcid); | |
319 | req.scid = __cpu_to_le16(l2cap_pi(sk)->scid); | |
320 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
321 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
322 | } else { | |
323 | l2cap_chan_del(sk, reason); | |
324 | } | |
325 | break; | |
326 | ||
327 | case BT_CONNECT: | |
328 | case BT_DISCONN: | |
329 | l2cap_chan_del(sk, reason); | |
330 | break; | |
331 | ||
332 | default: | |
333 | sock_set_flag(sk, SOCK_ZAPPED); | |
334 | break; | |
335 | } | |
336 | } | |
337 | ||
338 | /* Must be called on unlocked socket. */ | |
339 | static void l2cap_sock_close(struct sock *sk) | |
340 | { | |
341 | l2cap_sock_clear_timer(sk); | |
342 | lock_sock(sk); | |
343 | __l2cap_sock_close(sk, ECONNRESET); | |
344 | release_sock(sk); | |
345 | l2cap_sock_kill(sk); | |
346 | } | |
347 | ||
348 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
349 | { | |
350 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
351 | ||
352 | BT_DBG("sk %p", sk); | |
353 | ||
354 | if (parent) { | |
355 | sk->sk_type = parent->sk_type; | |
356 | pi->imtu = l2cap_pi(parent)->imtu; | |
357 | pi->omtu = l2cap_pi(parent)->omtu; | |
358 | pi->link_mode = l2cap_pi(parent)->link_mode; | |
359 | } else { | |
360 | pi->imtu = L2CAP_DEFAULT_MTU; | |
361 | pi->omtu = 0; | |
362 | pi->link_mode = 0; | |
363 | } | |
364 | ||
365 | /* Default config options */ | |
366 | pi->conf_mtu = L2CAP_DEFAULT_MTU; | |
367 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; | |
368 | } | |
369 | ||
370 | static struct proto l2cap_proto = { | |
371 | .name = "L2CAP", | |
372 | .owner = THIS_MODULE, | |
373 | .obj_size = sizeof(struct l2cap_pinfo) | |
374 | }; | |
375 | ||
376 | static struct sock *l2cap_sock_alloc(struct socket *sock, int proto, int prio) | |
377 | { | |
378 | struct sock *sk; | |
379 | ||
380 | sk = sk_alloc(PF_BLUETOOTH, prio, &l2cap_proto, 1); | |
381 | if (!sk) | |
382 | return NULL; | |
383 | ||
384 | sock_init_data(sock, sk); | |
385 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
386 | ||
387 | sk->sk_destruct = l2cap_sock_destruct; | |
388 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; | |
389 | ||
390 | sock_reset_flag(sk, SOCK_ZAPPED); | |
391 | ||
392 | sk->sk_protocol = proto; | |
393 | sk->sk_state = BT_OPEN; | |
394 | ||
395 | l2cap_sock_init_timer(sk); | |
396 | ||
397 | bt_sock_link(&l2cap_sk_list, sk); | |
398 | return sk; | |
399 | } | |
400 | ||
401 | static int l2cap_sock_create(struct socket *sock, int protocol) | |
402 | { | |
403 | struct sock *sk; | |
404 | ||
405 | BT_DBG("sock %p", sock); | |
406 | ||
407 | sock->state = SS_UNCONNECTED; | |
408 | ||
409 | if (sock->type != SOCK_SEQPACKET && | |
410 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
411 | return -ESOCKTNOSUPPORT; | |
412 | ||
413 | if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW)) | |
414 | return -EPERM; | |
415 | ||
416 | sock->ops = &l2cap_sock_ops; | |
417 | ||
418 | sk = l2cap_sock_alloc(sock, protocol, GFP_KERNEL); | |
419 | if (!sk) | |
420 | return -ENOMEM; | |
421 | ||
422 | l2cap_sock_init(sk, NULL); | |
423 | return 0; | |
424 | } | |
425 | ||
426 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
427 | { | |
428 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
429 | struct sock *sk = sock->sk; | |
430 | int err = 0; | |
431 | ||
432 | BT_DBG("sk %p, %s %d", sk, batostr(&la->l2_bdaddr), la->l2_psm); | |
433 | ||
434 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
435 | return -EINVAL; | |
436 | ||
437 | lock_sock(sk); | |
438 | ||
439 | if (sk->sk_state != BT_OPEN) { | |
440 | err = -EBADFD; | |
441 | goto done; | |
442 | } | |
443 | ||
444 | write_lock_bh(&l2cap_sk_list.lock); | |
445 | ||
446 | if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) { | |
447 | err = -EADDRINUSE; | |
448 | } else { | |
449 | /* Save source address */ | |
450 | bacpy(&bt_sk(sk)->src, &la->l2_bdaddr); | |
451 | l2cap_pi(sk)->psm = la->l2_psm; | |
452 | l2cap_pi(sk)->sport = la->l2_psm; | |
453 | sk->sk_state = BT_BOUND; | |
454 | } | |
455 | ||
456 | write_unlock_bh(&l2cap_sk_list.lock); | |
457 | ||
458 | done: | |
459 | release_sock(sk); | |
460 | return err; | |
461 | } | |
462 | ||
463 | static int l2cap_do_connect(struct sock *sk) | |
464 | { | |
465 | bdaddr_t *src = &bt_sk(sk)->src; | |
466 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
467 | struct l2cap_conn *conn; | |
468 | struct hci_conn *hcon; | |
469 | struct hci_dev *hdev; | |
470 | int err = 0; | |
471 | ||
472 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), l2cap_pi(sk)->psm); | |
473 | ||
474 | if (!(hdev = hci_get_route(dst, src))) | |
475 | return -EHOSTUNREACH; | |
476 | ||
477 | hci_dev_lock_bh(hdev); | |
478 | ||
479 | err = -ENOMEM; | |
480 | ||
481 | hcon = hci_connect(hdev, ACL_LINK, dst); | |
482 | if (!hcon) | |
483 | goto done; | |
484 | ||
485 | conn = l2cap_conn_add(hcon, 0); | |
486 | if (!conn) { | |
487 | hci_conn_put(hcon); | |
488 | goto done; | |
489 | } | |
490 | ||
491 | err = 0; | |
492 | ||
493 | /* Update source addr of the socket */ | |
494 | bacpy(src, conn->src); | |
495 | ||
496 | l2cap_chan_add(conn, sk, NULL); | |
497 | ||
498 | sk->sk_state = BT_CONNECT; | |
499 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
500 | ||
501 | if (hcon->state == BT_CONNECTED) { | |
502 | if (sk->sk_type == SOCK_SEQPACKET) { | |
503 | struct l2cap_conn_req req; | |
504 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); | |
505 | req.scid = __cpu_to_le16(l2cap_pi(sk)->scid); | |
506 | req.psm = l2cap_pi(sk)->psm; | |
507 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
508 | L2CAP_CONN_REQ, sizeof(req), &req); | |
509 | } else { | |
510 | l2cap_sock_clear_timer(sk); | |
511 | sk->sk_state = BT_CONNECTED; | |
512 | } | |
513 | } | |
514 | ||
515 | done: | |
516 | hci_dev_unlock_bh(hdev); | |
517 | hci_dev_put(hdev); | |
518 | return err; | |
519 | } | |
520 | ||
521 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
522 | { | |
523 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
524 | struct sock *sk = sock->sk; | |
525 | int err = 0; | |
526 | ||
527 | lock_sock(sk); | |
528 | ||
529 | BT_DBG("sk %p", sk); | |
530 | ||
531 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_l2)) { | |
532 | err = -EINVAL; | |
533 | goto done; | |
534 | } | |
535 | ||
536 | if (sk->sk_type == SOCK_SEQPACKET && !la->l2_psm) { | |
537 | err = -EINVAL; | |
538 | goto done; | |
539 | } | |
540 | ||
541 | switch(sk->sk_state) { | |
542 | case BT_CONNECT: | |
543 | case BT_CONNECT2: | |
544 | case BT_CONFIG: | |
545 | /* Already connecting */ | |
546 | goto wait; | |
547 | ||
548 | case BT_CONNECTED: | |
549 | /* Already connected */ | |
550 | goto done; | |
551 | ||
552 | case BT_OPEN: | |
553 | case BT_BOUND: | |
554 | /* Can connect */ | |
555 | break; | |
556 | ||
557 | default: | |
558 | err = -EBADFD; | |
559 | goto done; | |
560 | } | |
561 | ||
562 | /* Set destination address and psm */ | |
563 | bacpy(&bt_sk(sk)->dst, &la->l2_bdaddr); | |
564 | l2cap_pi(sk)->psm = la->l2_psm; | |
565 | ||
566 | if ((err = l2cap_do_connect(sk))) | |
567 | goto done; | |
568 | ||
569 | wait: | |
570 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
571 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
572 | done: | |
573 | release_sock(sk); | |
574 | return err; | |
575 | } | |
576 | ||
577 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
578 | { | |
579 | struct sock *sk = sock->sk; | |
580 | int err = 0; | |
581 | ||
582 | BT_DBG("sk %p backlog %d", sk, backlog); | |
583 | ||
584 | lock_sock(sk); | |
585 | ||
586 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
587 | err = -EBADFD; | |
588 | goto done; | |
589 | } | |
590 | ||
591 | if (!l2cap_pi(sk)->psm) { | |
592 | bdaddr_t *src = &bt_sk(sk)->src; | |
593 | u16 psm; | |
594 | ||
595 | err = -EINVAL; | |
596 | ||
597 | write_lock_bh(&l2cap_sk_list.lock); | |
598 | ||
599 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
600 | if (!__l2cap_get_sock_by_addr(psm, src)) { | |
601 | l2cap_pi(sk)->psm = htobs(psm); | |
602 | l2cap_pi(sk)->sport = htobs(psm); | |
603 | err = 0; | |
604 | break; | |
605 | } | |
606 | ||
607 | write_unlock_bh(&l2cap_sk_list.lock); | |
608 | ||
609 | if (err < 0) | |
610 | goto done; | |
611 | } | |
612 | ||
613 | sk->sk_max_ack_backlog = backlog; | |
614 | sk->sk_ack_backlog = 0; | |
615 | sk->sk_state = BT_LISTEN; | |
616 | ||
617 | done: | |
618 | release_sock(sk); | |
619 | return err; | |
620 | } | |
621 | ||
622 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
623 | { | |
624 | DECLARE_WAITQUEUE(wait, current); | |
625 | struct sock *sk = sock->sk, *nsk; | |
626 | long timeo; | |
627 | int err = 0; | |
628 | ||
629 | lock_sock(sk); | |
630 | ||
631 | if (sk->sk_state != BT_LISTEN) { | |
632 | err = -EBADFD; | |
633 | goto done; | |
634 | } | |
635 | ||
636 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
637 | ||
638 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
639 | ||
640 | /* Wait for an incoming connection. (wake-one). */ | |
641 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
642 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
643 | set_current_state(TASK_INTERRUPTIBLE); | |
644 | if (!timeo) { | |
645 | err = -EAGAIN; | |
646 | break; | |
647 | } | |
648 | ||
649 | release_sock(sk); | |
650 | timeo = schedule_timeout(timeo); | |
651 | lock_sock(sk); | |
652 | ||
653 | if (sk->sk_state != BT_LISTEN) { | |
654 | err = -EBADFD; | |
655 | break; | |
656 | } | |
657 | ||
658 | if (signal_pending(current)) { | |
659 | err = sock_intr_errno(timeo); | |
660 | break; | |
661 | } | |
662 | } | |
663 | set_current_state(TASK_RUNNING); | |
664 | remove_wait_queue(sk->sk_sleep, &wait); | |
665 | ||
666 | if (err) | |
667 | goto done; | |
668 | ||
669 | newsock->state = SS_CONNECTED; | |
670 | ||
671 | BT_DBG("new socket %p", nsk); | |
672 | ||
673 | done: | |
674 | release_sock(sk); | |
675 | return err; | |
676 | } | |
677 | ||
678 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
679 | { | |
680 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
681 | struct sock *sk = sock->sk; | |
682 | ||
683 | BT_DBG("sock %p, sk %p", sock, sk); | |
684 | ||
685 | addr->sa_family = AF_BLUETOOTH; | |
686 | *len = sizeof(struct sockaddr_l2); | |
687 | ||
688 | if (peer) | |
689 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); | |
690 | else | |
691 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); | |
692 | ||
693 | la->l2_psm = l2cap_pi(sk)->psm; | |
694 | return 0; | |
695 | } | |
696 | ||
697 | static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len) | |
698 | { | |
699 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
700 | struct sk_buff *skb, **frag; | |
701 | int err, hlen, count, sent=0; | |
702 | struct l2cap_hdr *lh; | |
703 | ||
704 | BT_DBG("sk %p len %d", sk, len); | |
705 | ||
706 | /* First fragment (with L2CAP header) */ | |
707 | if (sk->sk_type == SOCK_DGRAM) | |
708 | hlen = L2CAP_HDR_SIZE + 2; | |
709 | else | |
710 | hlen = L2CAP_HDR_SIZE; | |
711 | ||
712 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
713 | ||
714 | skb = bt_skb_send_alloc(sk, hlen + count, | |
715 | msg->msg_flags & MSG_DONTWAIT, &err); | |
716 | if (!skb) | |
717 | return err; | |
718 | ||
719 | /* Create L2CAP header */ | |
720 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
721 | lh->cid = __cpu_to_le16(l2cap_pi(sk)->dcid); | |
722 | lh->len = __cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
723 | ||
724 | if (sk->sk_type == SOCK_DGRAM) | |
725 | put_unaligned(l2cap_pi(sk)->psm, (u16 *) skb_put(skb, 2)); | |
726 | ||
727 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
728 | err = -EFAULT; | |
729 | goto fail; | |
730 | } | |
731 | ||
732 | sent += count; | |
733 | len -= count; | |
734 | ||
735 | /* Continuation fragments (no L2CAP header) */ | |
736 | frag = &skb_shinfo(skb)->frag_list; | |
737 | while (len) { | |
738 | count = min_t(unsigned int, conn->mtu, len); | |
739 | ||
740 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
741 | if (!*frag) | |
742 | goto fail; | |
743 | ||
744 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) { | |
745 | err = -EFAULT; | |
746 | goto fail; | |
747 | } | |
748 | ||
749 | sent += count; | |
750 | len -= count; | |
751 | ||
752 | frag = &(*frag)->next; | |
753 | } | |
754 | ||
755 | if ((err = hci_send_acl(conn->hcon, skb, 0)) < 0) | |
756 | goto fail; | |
757 | ||
758 | return sent; | |
759 | ||
760 | fail: | |
761 | kfree_skb(skb); | |
762 | return err; | |
763 | } | |
764 | ||
765 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
766 | { | |
767 | struct sock *sk = sock->sk; | |
768 | int err = 0; | |
769 | ||
770 | BT_DBG("sock %p, sk %p", sock, sk); | |
771 | ||
772 | if (sk->sk_err) | |
773 | return sock_error(sk); | |
774 | ||
775 | if (msg->msg_flags & MSG_OOB) | |
776 | return -EOPNOTSUPP; | |
777 | ||
778 | /* Check outgoing MTU */ | |
779 | if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu) | |
780 | return -EINVAL; | |
781 | ||
782 | lock_sock(sk); | |
783 | ||
784 | if (sk->sk_state == BT_CONNECTED) | |
785 | err = l2cap_do_send(sk, msg, len); | |
786 | else | |
787 | err = -ENOTCONN; | |
788 | ||
789 | release_sock(sk); | |
790 | return err; | |
791 | } | |
792 | ||
793 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) | |
794 | { | |
795 | struct sock *sk = sock->sk; | |
796 | struct l2cap_options opts; | |
797 | int err = 0, len; | |
798 | u32 opt; | |
799 | ||
800 | BT_DBG("sk %p", sk); | |
801 | ||
802 | lock_sock(sk); | |
803 | ||
804 | switch (optname) { | |
805 | case L2CAP_OPTIONS: | |
806 | len = min_t(unsigned int, sizeof(opts), optlen); | |
807 | if (copy_from_user((char *) &opts, optval, len)) { | |
808 | err = -EFAULT; | |
809 | break; | |
810 | } | |
811 | l2cap_pi(sk)->imtu = opts.imtu; | |
812 | l2cap_pi(sk)->omtu = opts.omtu; | |
813 | break; | |
814 | ||
815 | case L2CAP_LM: | |
816 | if (get_user(opt, (u32 __user *) optval)) { | |
817 | err = -EFAULT; | |
818 | break; | |
819 | } | |
820 | ||
821 | l2cap_pi(sk)->link_mode = opt; | |
822 | break; | |
823 | ||
824 | default: | |
825 | err = -ENOPROTOOPT; | |
826 | break; | |
827 | } | |
828 | ||
829 | release_sock(sk); | |
830 | return err; | |
831 | } | |
832 | ||
833 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
834 | { | |
835 | struct sock *sk = sock->sk; | |
836 | struct l2cap_options opts; | |
837 | struct l2cap_conninfo cinfo; | |
838 | int len, err = 0; | |
839 | ||
840 | BT_DBG("sk %p", sk); | |
841 | ||
842 | if (get_user(len, optlen)) | |
843 | return -EFAULT; | |
844 | ||
845 | lock_sock(sk); | |
846 | ||
847 | switch (optname) { | |
848 | case L2CAP_OPTIONS: | |
849 | opts.imtu = l2cap_pi(sk)->imtu; | |
850 | opts.omtu = l2cap_pi(sk)->omtu; | |
851 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
852 | opts.mode = 0x00; | |
853 | ||
854 | len = min_t(unsigned int, len, sizeof(opts)); | |
855 | if (copy_to_user(optval, (char *) &opts, len)) | |
856 | err = -EFAULT; | |
857 | ||
858 | break; | |
859 | ||
860 | case L2CAP_LM: | |
861 | if (put_user(l2cap_pi(sk)->link_mode, (u32 __user *) optval)) | |
862 | err = -EFAULT; | |
863 | break; | |
864 | ||
865 | case L2CAP_CONNINFO: | |
866 | if (sk->sk_state != BT_CONNECTED) { | |
867 | err = -ENOTCONN; | |
868 | break; | |
869 | } | |
870 | ||
871 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
872 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
873 | ||
874 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
875 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
876 | err = -EFAULT; | |
877 | ||
878 | break; | |
879 | ||
880 | default: | |
881 | err = -ENOPROTOOPT; | |
882 | break; | |
883 | } | |
884 | ||
885 | release_sock(sk); | |
886 | return err; | |
887 | } | |
888 | ||
889 | static int l2cap_sock_shutdown(struct socket *sock, int how) | |
890 | { | |
891 | struct sock *sk = sock->sk; | |
892 | int err = 0; | |
893 | ||
894 | BT_DBG("sock %p, sk %p", sock, sk); | |
895 | ||
896 | if (!sk) | |
897 | return 0; | |
898 | ||
899 | lock_sock(sk); | |
900 | if (!sk->sk_shutdown) { | |
901 | sk->sk_shutdown = SHUTDOWN_MASK; | |
902 | l2cap_sock_clear_timer(sk); | |
903 | __l2cap_sock_close(sk, 0); | |
904 | ||
905 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
906 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
907 | } | |
908 | release_sock(sk); | |
909 | return err; | |
910 | } | |
911 | ||
912 | static int l2cap_sock_release(struct socket *sock) | |
913 | { | |
914 | struct sock *sk = sock->sk; | |
915 | int err; | |
916 | ||
917 | BT_DBG("sock %p, sk %p", sock, sk); | |
918 | ||
919 | if (!sk) | |
920 | return 0; | |
921 | ||
922 | err = l2cap_sock_shutdown(sock, 2); | |
923 | ||
924 | sock_orphan(sk); | |
925 | l2cap_sock_kill(sk); | |
926 | return err; | |
927 | } | |
928 | ||
929 | /* ---- L2CAP channels ---- */ | |
930 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
931 | { | |
932 | struct sock *s; | |
933 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
934 | if (l2cap_pi(s)->dcid == cid) | |
935 | break; | |
936 | } | |
937 | return s; | |
938 | } | |
939 | ||
940 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
941 | { | |
942 | struct sock *s; | |
943 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
944 | if (l2cap_pi(s)->scid == cid) | |
945 | break; | |
946 | } | |
947 | return s; | |
948 | } | |
949 | ||
950 | /* Find channel with given SCID. | |
951 | * Returns locked socket */ | |
952 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
953 | { | |
954 | struct sock *s; | |
955 | read_lock(&l->lock); | |
956 | s = __l2cap_get_chan_by_scid(l, cid); | |
957 | if (s) bh_lock_sock(s); | |
958 | read_unlock(&l->lock); | |
959 | return s; | |
960 | } | |
961 | ||
962 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
963 | { | |
964 | struct sock *s; | |
965 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
966 | if (l2cap_pi(s)->ident == ident) | |
967 | break; | |
968 | } | |
969 | return s; | |
970 | } | |
971 | ||
972 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
973 | { | |
974 | struct sock *s; | |
975 | read_lock(&l->lock); | |
976 | s = __l2cap_get_chan_by_ident(l, ident); | |
977 | if (s) bh_lock_sock(s); | |
978 | read_unlock(&l->lock); | |
979 | return s; | |
980 | } | |
981 | ||
982 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
983 | { | |
984 | u16 cid = 0x0040; | |
985 | ||
986 | for (; cid < 0xffff; cid++) { | |
987 | if(!__l2cap_get_chan_by_scid(l, cid)) | |
988 | return cid; | |
989 | } | |
990 | ||
991 | return 0; | |
992 | } | |
993 | ||
994 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
995 | { | |
996 | sock_hold(sk); | |
997 | ||
998 | if (l->head) | |
999 | l2cap_pi(l->head)->prev_c = sk; | |
1000 | ||
1001 | l2cap_pi(sk)->next_c = l->head; | |
1002 | l2cap_pi(sk)->prev_c = NULL; | |
1003 | l->head = sk; | |
1004 | } | |
1005 | ||
1006 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
1007 | { | |
1008 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
1009 | ||
1010 | write_lock(&l->lock); | |
1011 | if (sk == l->head) | |
1012 | l->head = next; | |
1013 | ||
1014 | if (next) | |
1015 | l2cap_pi(next)->prev_c = prev; | |
1016 | if (prev) | |
1017 | l2cap_pi(prev)->next_c = next; | |
1018 | write_unlock(&l->lock); | |
1019 | ||
1020 | __sock_put(sk); | |
1021 | } | |
1022 | ||
1023 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
1024 | { | |
1025 | struct l2cap_chan_list *l = &conn->chan_list; | |
1026 | ||
1027 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
1028 | ||
1029 | l2cap_pi(sk)->conn = conn; | |
1030 | ||
1031 | if (sk->sk_type == SOCK_SEQPACKET) { | |
1032 | /* Alloc CID for connection-oriented socket */ | |
1033 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
1034 | } else if (sk->sk_type == SOCK_DGRAM) { | |
1035 | /* Connectionless socket */ | |
1036 | l2cap_pi(sk)->scid = 0x0002; | |
1037 | l2cap_pi(sk)->dcid = 0x0002; | |
1038 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
1039 | } else { | |
1040 | /* Raw socket can send/recv signalling messages only */ | |
1041 | l2cap_pi(sk)->scid = 0x0001; | |
1042 | l2cap_pi(sk)->dcid = 0x0001; | |
1043 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
1044 | } | |
1045 | ||
1046 | __l2cap_chan_link(l, sk); | |
1047 | ||
1048 | if (parent) | |
1049 | bt_accept_enqueue(parent, sk); | |
1050 | } | |
1051 | ||
1052 | /* Delete channel. | |
1053 | * Must be called on the locked socket. */ | |
1054 | static void l2cap_chan_del(struct sock *sk, int err) | |
1055 | { | |
1056 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1057 | struct sock *parent = bt_sk(sk)->parent; | |
1058 | ||
1059 | l2cap_sock_clear_timer(sk); | |
1060 | ||
1061 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
1062 | ||
1063 | if (conn) { | |
1064 | /* Unlink from channel list */ | |
1065 | l2cap_chan_unlink(&conn->chan_list, sk); | |
1066 | l2cap_pi(sk)->conn = NULL; | |
1067 | hci_conn_put(conn->hcon); | |
1068 | } | |
1069 | ||
1070 | sk->sk_state = BT_CLOSED; | |
1071 | sock_set_flag(sk, SOCK_ZAPPED); | |
1072 | ||
1073 | if (err) | |
1074 | sk->sk_err = err; | |
1075 | ||
1076 | if (parent) { | |
1077 | bt_accept_unlink(sk); | |
1078 | parent->sk_data_ready(parent, 0); | |
1079 | } else | |
1080 | sk->sk_state_change(sk); | |
1081 | } | |
1082 | ||
1083 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
1084 | { | |
1085 | struct l2cap_chan_list *l = &conn->chan_list; | |
1086 | struct sock *sk; | |
1087 | ||
1088 | BT_DBG("conn %p", conn); | |
1089 | ||
1090 | read_lock(&l->lock); | |
1091 | ||
1092 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1093 | bh_lock_sock(sk); | |
1094 | ||
1095 | if (sk->sk_type != SOCK_SEQPACKET) { | |
1096 | l2cap_sock_clear_timer(sk); | |
1097 | sk->sk_state = BT_CONNECTED; | |
1098 | sk->sk_state_change(sk); | |
1099 | } else if (sk->sk_state == BT_CONNECT) { | |
1100 | struct l2cap_conn_req req; | |
1101 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); | |
1102 | req.scid = __cpu_to_le16(l2cap_pi(sk)->scid); | |
1103 | req.psm = l2cap_pi(sk)->psm; | |
1104 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, L2CAP_CONN_REQ, sizeof(req), &req); | |
1105 | } | |
1106 | ||
1107 | bh_unlock_sock(sk); | |
1108 | } | |
1109 | ||
1110 | read_unlock(&l->lock); | |
1111 | } | |
1112 | ||
1113 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
1114 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
1115 | { | |
1116 | struct l2cap_chan_list *l = &conn->chan_list; | |
1117 | struct sock *sk; | |
1118 | ||
1119 | BT_DBG("conn %p", conn); | |
1120 | ||
1121 | read_lock(&l->lock); | |
1122 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1123 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_RELIABLE) | |
1124 | sk->sk_err = err; | |
1125 | } | |
1126 | read_unlock(&l->lock); | |
1127 | } | |
1128 | ||
1129 | static void l2cap_chan_ready(struct sock *sk) | |
1130 | { | |
1131 | struct sock *parent = bt_sk(sk)->parent; | |
1132 | ||
1133 | BT_DBG("sk %p, parent %p", sk, parent); | |
1134 | ||
1135 | l2cap_pi(sk)->conf_state = 0; | |
1136 | l2cap_sock_clear_timer(sk); | |
1137 | ||
1138 | if (!parent) { | |
1139 | /* Outgoing channel. | |
1140 | * Wake up socket sleeping on connect. | |
1141 | */ | |
1142 | sk->sk_state = BT_CONNECTED; | |
1143 | sk->sk_state_change(sk); | |
1144 | } else { | |
1145 | /* Incoming channel. | |
1146 | * Wake up socket sleeping on accept. | |
1147 | */ | |
1148 | parent->sk_data_ready(parent, 0); | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | /* Copy frame to all raw sockets on that connection */ | |
1153 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
1154 | { | |
1155 | struct l2cap_chan_list *l = &conn->chan_list; | |
1156 | struct sk_buff *nskb; | |
1157 | struct sock * sk; | |
1158 | ||
1159 | BT_DBG("conn %p", conn); | |
1160 | ||
1161 | read_lock(&l->lock); | |
1162 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1163 | if (sk->sk_type != SOCK_RAW) | |
1164 | continue; | |
1165 | ||
1166 | /* Don't send frame to the socket it came from */ | |
1167 | if (skb->sk == sk) | |
1168 | continue; | |
1169 | ||
1170 | if (!(nskb = skb_clone(skb, GFP_ATOMIC))) | |
1171 | continue; | |
1172 | ||
1173 | if (sock_queue_rcv_skb(sk, nskb)) | |
1174 | kfree_skb(nskb); | |
1175 | } | |
1176 | read_unlock(&l->lock); | |
1177 | } | |
1178 | ||
1179 | /* ---- L2CAP signalling commands ---- */ | |
1180 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
1181 | u8 code, u8 ident, u16 dlen, void *data) | |
1182 | { | |
1183 | struct sk_buff *skb, **frag; | |
1184 | struct l2cap_cmd_hdr *cmd; | |
1185 | struct l2cap_hdr *lh; | |
1186 | int len, count; | |
1187 | ||
1188 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", conn, code, ident, dlen); | |
1189 | ||
1190 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
1191 | count = min_t(unsigned int, conn->mtu, len); | |
1192 | ||
1193 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
1194 | if (!skb) | |
1195 | return NULL; | |
1196 | ||
1197 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1198 | lh->len = __cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); | |
1199 | lh->cid = __cpu_to_le16(0x0001); | |
1200 | ||
1201 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
1202 | cmd->code = code; | |
1203 | cmd->ident = ident; | |
1204 | cmd->len = __cpu_to_le16(dlen); | |
1205 | ||
1206 | if (dlen) { | |
1207 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
1208 | memcpy(skb_put(skb, count), data, count); | |
1209 | data += count; | |
1210 | } | |
1211 | ||
1212 | len -= skb->len; | |
1213 | ||
1214 | /* Continuation fragments (no L2CAP header) */ | |
1215 | frag = &skb_shinfo(skb)->frag_list; | |
1216 | while (len) { | |
1217 | count = min_t(unsigned int, conn->mtu, len); | |
1218 | ||
1219 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
1220 | if (!*frag) | |
1221 | goto fail; | |
1222 | ||
1223 | memcpy(skb_put(*frag, count), data, count); | |
1224 | ||
1225 | len -= count; | |
1226 | data += count; | |
1227 | ||
1228 | frag = &(*frag)->next; | |
1229 | } | |
1230 | ||
1231 | return skb; | |
1232 | ||
1233 | fail: | |
1234 | kfree_skb(skb); | |
1235 | return NULL; | |
1236 | } | |
1237 | ||
1238 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
1239 | { | |
1240 | struct l2cap_conf_opt *opt = *ptr; | |
1241 | int len; | |
1242 | ||
1243 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
1244 | *ptr += len; | |
1245 | ||
1246 | *type = opt->type; | |
1247 | *olen = opt->len; | |
1248 | ||
1249 | switch (opt->len) { | |
1250 | case 1: | |
1251 | *val = *((u8 *) opt->val); | |
1252 | break; | |
1253 | ||
1254 | case 2: | |
1255 | *val = __le16_to_cpu(*((u16 *)opt->val)); | |
1256 | break; | |
1257 | ||
1258 | case 4: | |
1259 | *val = __le32_to_cpu(*((u32 *)opt->val)); | |
1260 | break; | |
1261 | ||
1262 | default: | |
1263 | *val = (unsigned long) opt->val; | |
1264 | break; | |
1265 | } | |
1266 | ||
1267 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
1268 | return len; | |
1269 | } | |
1270 | ||
1271 | static inline void l2cap_parse_conf_req(struct sock *sk, void *data, int len) | |
1272 | { | |
1273 | int type, hint, olen; | |
1274 | unsigned long val; | |
1275 | void *ptr = data; | |
1276 | ||
1277 | BT_DBG("sk %p len %d", sk, len); | |
1278 | ||
1279 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
1280 | len -= l2cap_get_conf_opt(&ptr, &type, &olen, &val); | |
1281 | ||
1282 | hint = type & 0x80; | |
1283 | type &= 0x7f; | |
1284 | ||
1285 | switch (type) { | |
1286 | case L2CAP_CONF_MTU: | |
1287 | l2cap_pi(sk)->conf_mtu = val; | |
1288 | break; | |
1289 | ||
1290 | case L2CAP_CONF_FLUSH_TO: | |
1291 | l2cap_pi(sk)->flush_to = val; | |
1292 | break; | |
1293 | ||
1294 | case L2CAP_CONF_QOS: | |
1295 | break; | |
1296 | ||
1297 | default: | |
1298 | if (hint) | |
1299 | break; | |
1300 | ||
1301 | /* FIXME: Reject unknown option */ | |
1302 | break; | |
1303 | } | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) | |
1308 | { | |
1309 | struct l2cap_conf_opt *opt = *ptr; | |
1310 | ||
1311 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
1312 | ||
1313 | opt->type = type; | |
1314 | opt->len = len; | |
1315 | ||
1316 | switch (len) { | |
1317 | case 1: | |
1318 | *((u8 *) opt->val) = val; | |
1319 | break; | |
1320 | ||
1321 | case 2: | |
1322 | *((u16 *) opt->val) = __cpu_to_le16(val); | |
1323 | break; | |
1324 | ||
1325 | case 4: | |
1326 | *((u32 *) opt->val) = __cpu_to_le32(val); | |
1327 | break; | |
1328 | ||
1329 | default: | |
1330 | memcpy(opt->val, (void *) val, len); | |
1331 | break; | |
1332 | } | |
1333 | ||
1334 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
1335 | } | |
1336 | ||
1337 | static int l2cap_build_conf_req(struct sock *sk, void *data) | |
1338 | { | |
1339 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1340 | struct l2cap_conf_req *req = data; | |
1341 | void *ptr = req->data; | |
1342 | ||
1343 | BT_DBG("sk %p", sk); | |
1344 | ||
1345 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
1346 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
1347 | ||
1348 | /* FIXME: Need actual value of the flush timeout */ | |
1349 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
1350 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
1351 | ||
1352 | req->dcid = __cpu_to_le16(pi->dcid); | |
1353 | req->flags = __cpu_to_le16(0); | |
1354 | ||
1355 | return ptr - data; | |
1356 | } | |
1357 | ||
1358 | static inline int l2cap_conf_output(struct sock *sk, void **ptr) | |
1359 | { | |
1360 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1361 | int result = 0; | |
1362 | ||
1363 | /* Configure output options and let the other side know | |
1364 | * which ones we don't like. */ | |
1365 | if (pi->conf_mtu < pi->omtu) { | |
1366 | l2cap_add_conf_opt(ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
1367 | result = L2CAP_CONF_UNACCEPT; | |
1368 | } else { | |
1369 | pi->omtu = pi->conf_mtu; | |
1370 | } | |
1371 | ||
1372 | BT_DBG("sk %p result %d", sk, result); | |
1373 | return result; | |
1374 | } | |
1375 | ||
1376 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, int *result) | |
1377 | { | |
1378 | struct l2cap_conf_rsp *rsp = data; | |
1379 | void *ptr = rsp->data; | |
1380 | u16 flags = 0; | |
1381 | ||
1382 | BT_DBG("sk %p complete %d", sk, result ? 1 : 0); | |
1383 | ||
1384 | if (result) | |
1385 | *result = l2cap_conf_output(sk, &ptr); | |
1386 | else | |
1387 | flags = 0x0001; | |
1388 | ||
1389 | rsp->scid = __cpu_to_le16(l2cap_pi(sk)->dcid); | |
1390 | rsp->result = __cpu_to_le16(result ? *result : 0); | |
1391 | rsp->flags = __cpu_to_le16(flags); | |
1392 | ||
1393 | return ptr - data; | |
1394 | } | |
1395 | ||
1396 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1397 | { | |
1398 | struct l2cap_chan_list *list = &conn->chan_list; | |
1399 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
1400 | struct l2cap_conn_rsp rsp; | |
1401 | struct sock *sk, *parent; | |
1402 | int result = 0, status = 0; | |
1403 | ||
1404 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
1405 | u16 psm = req->psm; | |
1406 | ||
1407 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
1408 | ||
1409 | /* Check if we have socket listening on psm */ | |
1410 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
1411 | if (!parent) { | |
1412 | result = L2CAP_CR_BAD_PSM; | |
1413 | goto sendresp; | |
1414 | } | |
1415 | ||
1416 | result = L2CAP_CR_NO_MEM; | |
1417 | ||
1418 | /* Check for backlog size */ | |
1419 | if (sk_acceptq_is_full(parent)) { | |
1420 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
1421 | goto response; | |
1422 | } | |
1423 | ||
1424 | sk = l2cap_sock_alloc(NULL, BTPROTO_L2CAP, GFP_ATOMIC); | |
1425 | if (!sk) | |
1426 | goto response; | |
1427 | ||
1428 | write_lock(&list->lock); | |
1429 | ||
1430 | /* Check if we already have channel with that dcid */ | |
1431 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
1432 | write_unlock(&list->lock); | |
1433 | sock_set_flag(sk, SOCK_ZAPPED); | |
1434 | l2cap_sock_kill(sk); | |
1435 | goto response; | |
1436 | } | |
1437 | ||
1438 | hci_conn_hold(conn->hcon); | |
1439 | ||
1440 | l2cap_sock_init(sk, parent); | |
1441 | bacpy(&bt_sk(sk)->src, conn->src); | |
1442 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
1443 | l2cap_pi(sk)->psm = psm; | |
1444 | l2cap_pi(sk)->dcid = scid; | |
1445 | ||
1446 | __l2cap_chan_add(conn, sk, parent); | |
1447 | dcid = l2cap_pi(sk)->scid; | |
1448 | ||
1449 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1450 | ||
1451 | /* Service level security */ | |
1452 | result = L2CAP_CR_PEND; | |
1453 | status = L2CAP_CS_AUTHEN_PEND; | |
1454 | sk->sk_state = BT_CONNECT2; | |
1455 | l2cap_pi(sk)->ident = cmd->ident; | |
1456 | ||
1457 | if ((l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) || | |
1458 | (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) { | |
1459 | if (!hci_conn_encrypt(conn->hcon)) | |
1460 | goto done; | |
1461 | } else if (l2cap_pi(sk)->link_mode & L2CAP_LM_AUTH) { | |
1462 | if (!hci_conn_auth(conn->hcon)) | |
1463 | goto done; | |
1464 | } | |
1465 | ||
1466 | sk->sk_state = BT_CONFIG; | |
1467 | result = status = 0; | |
1468 | ||
1469 | done: | |
1470 | write_unlock(&list->lock); | |
1471 | ||
1472 | response: | |
1473 | bh_unlock_sock(parent); | |
1474 | ||
1475 | sendresp: | |
1476 | rsp.scid = __cpu_to_le16(scid); | |
1477 | rsp.dcid = __cpu_to_le16(dcid); | |
1478 | rsp.result = __cpu_to_le16(result); | |
1479 | rsp.status = __cpu_to_le16(status); | |
1480 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1481 | return 0; | |
1482 | } | |
1483 | ||
1484 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1485 | { | |
1486 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
1487 | u16 scid, dcid, result, status; | |
1488 | struct sock *sk; | |
1489 | u8 req[128]; | |
1490 | ||
1491 | scid = __le16_to_cpu(rsp->scid); | |
1492 | dcid = __le16_to_cpu(rsp->dcid); | |
1493 | result = __le16_to_cpu(rsp->result); | |
1494 | status = __le16_to_cpu(rsp->status); | |
1495 | ||
1496 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
1497 | ||
1498 | if (scid) { | |
1499 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1500 | return 0; | |
1501 | } else { | |
1502 | if (!(sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident))) | |
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | switch (result) { | |
1507 | case L2CAP_CR_SUCCESS: | |
1508 | sk->sk_state = BT_CONFIG; | |
1509 | l2cap_pi(sk)->ident = 0; | |
1510 | l2cap_pi(sk)->dcid = dcid; | |
1511 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
1512 | ||
1513 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1514 | l2cap_build_conf_req(sk, req), req); | |
1515 | break; | |
1516 | ||
1517 | case L2CAP_CR_PEND: | |
1518 | break; | |
1519 | ||
1520 | default: | |
1521 | l2cap_chan_del(sk, ECONNREFUSED); | |
1522 | break; | |
1523 | } | |
1524 | ||
1525 | bh_unlock_sock(sk); | |
1526 | return 0; | |
1527 | } | |
1528 | ||
1529 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1530 | { | |
1531 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
1532 | u16 dcid, flags; | |
1533 | u8 rsp[64]; | |
1534 | struct sock *sk; | |
1535 | int result; | |
1536 | ||
1537 | dcid = __le16_to_cpu(req->dcid); | |
1538 | flags = __le16_to_cpu(req->flags); | |
1539 | ||
1540 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
1541 | ||
1542 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
1543 | return -ENOENT; | |
1544 | ||
1545 | l2cap_parse_conf_req(sk, req->data, cmd->len - sizeof(*req)); | |
1546 | ||
1547 | if (flags & 0x0001) { | |
1548 | /* Incomplete config. Send empty response. */ | |
1549 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
1550 | l2cap_build_conf_rsp(sk, rsp, NULL), rsp); | |
1551 | goto unlock; | |
1552 | } | |
1553 | ||
1554 | /* Complete config. */ | |
1555 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
1556 | l2cap_build_conf_rsp(sk, rsp, &result), rsp); | |
1557 | ||
1558 | if (result) | |
1559 | goto unlock; | |
1560 | ||
1561 | /* Output config done */ | |
1562 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
1563 | ||
1564 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { | |
1565 | sk->sk_state = BT_CONNECTED; | |
1566 | l2cap_chan_ready(sk); | |
1567 | } else if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
1568 | u8 req[64]; | |
1569 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1570 | l2cap_build_conf_req(sk, req), req); | |
1571 | } | |
1572 | ||
1573 | unlock: | |
1574 | bh_unlock_sock(sk); | |
1575 | return 0; | |
1576 | } | |
1577 | ||
1578 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1579 | { | |
1580 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
1581 | u16 scid, flags, result; | |
1582 | struct sock *sk; | |
1583 | ||
1584 | scid = __le16_to_cpu(rsp->scid); | |
1585 | flags = __le16_to_cpu(rsp->flags); | |
1586 | result = __le16_to_cpu(rsp->result); | |
1587 | ||
1588 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", scid, flags, result); | |
1589 | ||
1590 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1591 | return 0; | |
1592 | ||
1593 | switch (result) { | |
1594 | case L2CAP_CONF_SUCCESS: | |
1595 | break; | |
1596 | ||
1597 | case L2CAP_CONF_UNACCEPT: | |
1598 | if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) { | |
1599 | char req[128]; | |
1600 | /* It does not make sense to adjust L2CAP parameters | |
1601 | * that are currently defined in the spec. We simply | |
1602 | * resend config request that we sent earlier. It is | |
1603 | * stupid, but it helps qualification testing which | |
1604 | * expects at least some response from us. */ | |
1605 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1606 | l2cap_build_conf_req(sk, req), req); | |
1607 | goto done; | |
1608 | } | |
1609 | ||
1610 | default: | |
1611 | sk->sk_state = BT_DISCONN; | |
1612 | sk->sk_err = ECONNRESET; | |
1613 | l2cap_sock_set_timer(sk, HZ * 5); | |
1614 | { | |
1615 | struct l2cap_disconn_req req; | |
1616 | req.dcid = __cpu_to_le16(l2cap_pi(sk)->dcid); | |
1617 | req.scid = __cpu_to_le16(l2cap_pi(sk)->scid); | |
1618 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
1619 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
1620 | } | |
1621 | goto done; | |
1622 | } | |
1623 | ||
1624 | if (flags & 0x01) | |
1625 | goto done; | |
1626 | ||
1627 | /* Input config done */ | |
1628 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; | |
1629 | ||
1630 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
1631 | sk->sk_state = BT_CONNECTED; | |
1632 | l2cap_chan_ready(sk); | |
1633 | } | |
1634 | ||
1635 | done: | |
1636 | bh_unlock_sock(sk); | |
1637 | return 0; | |
1638 | } | |
1639 | ||
1640 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1641 | { | |
1642 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
1643 | struct l2cap_disconn_rsp rsp; | |
1644 | u16 dcid, scid; | |
1645 | struct sock *sk; | |
1646 | ||
1647 | scid = __le16_to_cpu(req->scid); | |
1648 | dcid = __le16_to_cpu(req->dcid); | |
1649 | ||
1650 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
1651 | ||
1652 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
1653 | return 0; | |
1654 | ||
1655 | rsp.dcid = __cpu_to_le16(l2cap_pi(sk)->scid); | |
1656 | rsp.scid = __cpu_to_le16(l2cap_pi(sk)->dcid); | |
1657 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); | |
1658 | ||
1659 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1660 | ||
1661 | l2cap_chan_del(sk, ECONNRESET); | |
1662 | bh_unlock_sock(sk); | |
1663 | ||
1664 | l2cap_sock_kill(sk); | |
1665 | return 0; | |
1666 | } | |
1667 | ||
1668 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1669 | { | |
1670 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
1671 | u16 dcid, scid; | |
1672 | struct sock *sk; | |
1673 | ||
1674 | scid = __le16_to_cpu(rsp->scid); | |
1675 | dcid = __le16_to_cpu(rsp->dcid); | |
1676 | ||
1677 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
1678 | ||
1679 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1680 | return 0; | |
1681 | ||
1682 | l2cap_chan_del(sk, 0); | |
1683 | bh_unlock_sock(sk); | |
1684 | ||
1685 | l2cap_sock_kill(sk); | |
1686 | return 0; | |
1687 | } | |
1688 | ||
1689 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1690 | { | |
1691 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1692 | struct l2cap_info_rsp rsp; | |
1693 | u16 type; | |
1694 | ||
1695 | type = __le16_to_cpu(req->type); | |
1696 | ||
1697 | BT_DBG("type 0x%4.4x", type); | |
1698 | ||
1699 | rsp.type = __cpu_to_le16(type); | |
1700 | rsp.result = __cpu_to_le16(L2CAP_IR_NOTSUPP); | |
1701 | l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
1702 | ||
1703 | return 0; | |
1704 | } | |
1705 | ||
1706 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1707 | { | |
1708 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
1709 | u16 type, result; | |
1710 | ||
1711 | type = __le16_to_cpu(rsp->type); | |
1712 | result = __le16_to_cpu(rsp->result); | |
1713 | ||
1714 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
1715 | ||
1716 | return 0; | |
1717 | } | |
1718 | ||
1719 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
1720 | { | |
1721 | u8 *data = skb->data; | |
1722 | int len = skb->len; | |
1723 | struct l2cap_cmd_hdr cmd; | |
1724 | int err = 0; | |
1725 | ||
1726 | l2cap_raw_recv(conn, skb); | |
1727 | ||
1728 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
1729 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); | |
1730 | data += L2CAP_CMD_HDR_SIZE; | |
1731 | len -= L2CAP_CMD_HDR_SIZE; | |
1732 | ||
1733 | cmd.len = __le16_to_cpu(cmd.len); | |
1734 | ||
1735 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd.len, cmd.ident); | |
1736 | ||
1737 | if (cmd.len > len || !cmd.ident) { | |
1738 | BT_DBG("corrupted command"); | |
1739 | break; | |
1740 | } | |
1741 | ||
1742 | switch (cmd.code) { | |
1743 | case L2CAP_COMMAND_REJ: | |
1744 | /* FIXME: We should process this */ | |
1745 | break; | |
1746 | ||
1747 | case L2CAP_CONN_REQ: | |
1748 | err = l2cap_connect_req(conn, &cmd, data); | |
1749 | break; | |
1750 | ||
1751 | case L2CAP_CONN_RSP: | |
1752 | err = l2cap_connect_rsp(conn, &cmd, data); | |
1753 | break; | |
1754 | ||
1755 | case L2CAP_CONF_REQ: | |
1756 | err = l2cap_config_req(conn, &cmd, data); | |
1757 | break; | |
1758 | ||
1759 | case L2CAP_CONF_RSP: | |
1760 | err = l2cap_config_rsp(conn, &cmd, data); | |
1761 | break; | |
1762 | ||
1763 | case L2CAP_DISCONN_REQ: | |
1764 | err = l2cap_disconnect_req(conn, &cmd, data); | |
1765 | break; | |
1766 | ||
1767 | case L2CAP_DISCONN_RSP: | |
1768 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
1769 | break; | |
1770 | ||
1771 | case L2CAP_ECHO_REQ: | |
1772 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd.len, data); | |
1773 | break; | |
1774 | ||
1775 | case L2CAP_ECHO_RSP: | |
1776 | break; | |
1777 | ||
1778 | case L2CAP_INFO_REQ: | |
1779 | err = l2cap_information_req(conn, &cmd, data); | |
1780 | break; | |
1781 | ||
1782 | case L2CAP_INFO_RSP: | |
1783 | err = l2cap_information_rsp(conn, &cmd, data); | |
1784 | break; | |
1785 | ||
1786 | default: | |
1787 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
1788 | err = -EINVAL; | |
1789 | break; | |
1790 | } | |
1791 | ||
1792 | if (err) { | |
1793 | struct l2cap_cmd_rej rej; | |
1794 | BT_DBG("error %d", err); | |
1795 | ||
1796 | /* FIXME: Map err to a valid reason */ | |
1797 | rej.reason = __cpu_to_le16(0); | |
1798 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); | |
1799 | } | |
1800 | ||
1801 | data += cmd.len; | |
1802 | len -= cmd.len; | |
1803 | } | |
1804 | ||
1805 | kfree_skb(skb); | |
1806 | } | |
1807 | ||
1808 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) | |
1809 | { | |
1810 | struct sock *sk; | |
1811 | ||
1812 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
1813 | if (!sk) { | |
1814 | BT_DBG("unknown cid 0x%4.4x", cid); | |
1815 | goto drop; | |
1816 | } | |
1817 | ||
1818 | BT_DBG("sk %p, len %d", sk, skb->len); | |
1819 | ||
1820 | if (sk->sk_state != BT_CONNECTED) | |
1821 | goto drop; | |
1822 | ||
1823 | if (l2cap_pi(sk)->imtu < skb->len) | |
1824 | goto drop; | |
1825 | ||
1826 | /* If socket recv buffers overflows we drop data here | |
1827 | * which is *bad* because L2CAP has to be reliable. | |
1828 | * But we don't have any other choice. L2CAP doesn't | |
1829 | * provide flow control mechanism. */ | |
1830 | ||
1831 | if (!sock_queue_rcv_skb(sk, skb)) | |
1832 | goto done; | |
1833 | ||
1834 | drop: | |
1835 | kfree_skb(skb); | |
1836 | ||
1837 | done: | |
1838 | if (sk) bh_unlock_sock(sk); | |
1839 | return 0; | |
1840 | } | |
1841 | ||
1842 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, u16 psm, struct sk_buff *skb) | |
1843 | { | |
1844 | struct sock *sk; | |
1845 | ||
1846 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
1847 | if (!sk) | |
1848 | goto drop; | |
1849 | ||
1850 | BT_DBG("sk %p, len %d", sk, skb->len); | |
1851 | ||
1852 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
1853 | goto drop; | |
1854 | ||
1855 | if (l2cap_pi(sk)->imtu < skb->len) | |
1856 | goto drop; | |
1857 | ||
1858 | if (!sock_queue_rcv_skb(sk, skb)) | |
1859 | goto done; | |
1860 | ||
1861 | drop: | |
1862 | kfree_skb(skb); | |
1863 | ||
1864 | done: | |
1865 | if (sk) bh_unlock_sock(sk); | |
1866 | return 0; | |
1867 | } | |
1868 | ||
1869 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
1870 | { | |
1871 | struct l2cap_hdr *lh = (void *) skb->data; | |
1872 | u16 cid, psm, len; | |
1873 | ||
1874 | skb_pull(skb, L2CAP_HDR_SIZE); | |
1875 | cid = __le16_to_cpu(lh->cid); | |
1876 | len = __le16_to_cpu(lh->len); | |
1877 | ||
1878 | BT_DBG("len %d, cid 0x%4.4x", len, cid); | |
1879 | ||
1880 | switch (cid) { | |
1881 | case 0x0001: | |
1882 | l2cap_sig_channel(conn, skb); | |
1883 | break; | |
1884 | ||
1885 | case 0x0002: | |
1886 | psm = get_unaligned((u16 *) skb->data); | |
1887 | skb_pull(skb, 2); | |
1888 | l2cap_conless_channel(conn, psm, skb); | |
1889 | break; | |
1890 | ||
1891 | default: | |
1892 | l2cap_data_channel(conn, cid, skb); | |
1893 | break; | |
1894 | } | |
1895 | } | |
1896 | ||
1897 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
1898 | ||
1899 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
1900 | { | |
1901 | int exact = 0, lm1 = 0, lm2 = 0; | |
1902 | register struct sock *sk; | |
1903 | struct hlist_node *node; | |
1904 | ||
1905 | if (type != ACL_LINK) | |
1906 | return 0; | |
1907 | ||
1908 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
1909 | ||
1910 | /* Find listening sockets and check their link_mode */ | |
1911 | read_lock(&l2cap_sk_list.lock); | |
1912 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
1913 | if (sk->sk_state != BT_LISTEN) | |
1914 | continue; | |
1915 | ||
1916 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
1917 | lm1 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode); | |
1918 | exact++; | |
1919 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
1920 | lm2 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode); | |
1921 | } | |
1922 | read_unlock(&l2cap_sk_list.lock); | |
1923 | ||
1924 | return exact ? lm1 : lm2; | |
1925 | } | |
1926 | ||
1927 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
1928 | { | |
1929 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
1930 | ||
1931 | if (hcon->type != ACL_LINK) | |
1932 | return 0; | |
1933 | ||
1934 | if (!status) { | |
1935 | struct l2cap_conn *conn; | |
1936 | ||
1937 | conn = l2cap_conn_add(hcon, status); | |
1938 | if (conn) | |
1939 | l2cap_conn_ready(conn); | |
1940 | } else | |
1941 | l2cap_conn_del(hcon, bt_err(status)); | |
1942 | ||
1943 | return 0; | |
1944 | } | |
1945 | ||
1946 | static int l2cap_disconn_ind(struct hci_conn *hcon, u8 reason) | |
1947 | { | |
1948 | BT_DBG("hcon %p reason %d", hcon, reason); | |
1949 | ||
1950 | if (hcon->type != ACL_LINK) | |
1951 | return 0; | |
1952 | ||
1953 | l2cap_conn_del(hcon, bt_err(reason)); | |
1954 | return 0; | |
1955 | } | |
1956 | ||
1957 | static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status) | |
1958 | { | |
1959 | struct l2cap_chan_list *l; | |
1960 | struct l2cap_conn *conn; | |
1961 | struct l2cap_conn_rsp rsp; | |
1962 | struct sock *sk; | |
1963 | int result; | |
1964 | ||
1965 | if (!(conn = hcon->l2cap_data)) | |
1966 | return 0; | |
1967 | l = &conn->chan_list; | |
1968 | ||
1969 | BT_DBG("conn %p", conn); | |
1970 | ||
1971 | read_lock(&l->lock); | |
1972 | ||
1973 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1974 | bh_lock_sock(sk); | |
1975 | ||
1976 | if (sk->sk_state != BT_CONNECT2 || | |
1977 | (l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) || | |
1978 | (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) { | |
1979 | bh_unlock_sock(sk); | |
1980 | continue; | |
1981 | } | |
1982 | ||
1983 | if (!status) { | |
1984 | sk->sk_state = BT_CONFIG; | |
1985 | result = 0; | |
1986 | } else { | |
1987 | sk->sk_state = BT_DISCONN; | |
1988 | l2cap_sock_set_timer(sk, HZ/10); | |
1989 | result = L2CAP_CR_SEC_BLOCK; | |
1990 | } | |
1991 | ||
1992 | rsp.scid = __cpu_to_le16(l2cap_pi(sk)->dcid); | |
1993 | rsp.dcid = __cpu_to_le16(l2cap_pi(sk)->scid); | |
1994 | rsp.result = __cpu_to_le16(result); | |
1995 | rsp.status = __cpu_to_le16(0); | |
1996 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
1997 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1998 | ||
1999 | bh_unlock_sock(sk); | |
2000 | } | |
2001 | ||
2002 | read_unlock(&l->lock); | |
2003 | return 0; | |
2004 | } | |
2005 | ||
2006 | static int l2cap_encrypt_cfm(struct hci_conn *hcon, u8 status) | |
2007 | { | |
2008 | struct l2cap_chan_list *l; | |
2009 | struct l2cap_conn *conn; | |
2010 | struct l2cap_conn_rsp rsp; | |
2011 | struct sock *sk; | |
2012 | int result; | |
2013 | ||
2014 | if (!(conn = hcon->l2cap_data)) | |
2015 | return 0; | |
2016 | l = &conn->chan_list; | |
2017 | ||
2018 | BT_DBG("conn %p", conn); | |
2019 | ||
2020 | read_lock(&l->lock); | |
2021 | ||
2022 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2023 | bh_lock_sock(sk); | |
2024 | ||
2025 | if (sk->sk_state != BT_CONNECT2) { | |
2026 | bh_unlock_sock(sk); | |
2027 | continue; | |
2028 | } | |
2029 | ||
2030 | if (!status) { | |
2031 | sk->sk_state = BT_CONFIG; | |
2032 | result = 0; | |
2033 | } else { | |
2034 | sk->sk_state = BT_DISCONN; | |
2035 | l2cap_sock_set_timer(sk, HZ/10); | |
2036 | result = L2CAP_CR_SEC_BLOCK; | |
2037 | } | |
2038 | ||
2039 | rsp.scid = __cpu_to_le16(l2cap_pi(sk)->dcid); | |
2040 | rsp.dcid = __cpu_to_le16(l2cap_pi(sk)->scid); | |
2041 | rsp.result = __cpu_to_le16(result); | |
2042 | rsp.status = __cpu_to_le16(0); | |
2043 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
2044 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
2045 | ||
2046 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE) | |
2047 | hci_conn_change_link_key(hcon); | |
2048 | ||
2049 | bh_unlock_sock(sk); | |
2050 | } | |
2051 | ||
2052 | read_unlock(&l->lock); | |
2053 | return 0; | |
2054 | } | |
2055 | ||
2056 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
2057 | { | |
2058 | struct l2cap_conn *conn = hcon->l2cap_data; | |
2059 | ||
2060 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
2061 | goto drop; | |
2062 | ||
2063 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
2064 | ||
2065 | if (flags & ACL_START) { | |
2066 | struct l2cap_hdr *hdr; | |
2067 | int len; | |
2068 | ||
2069 | if (conn->rx_len) { | |
2070 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
2071 | kfree_skb(conn->rx_skb); | |
2072 | conn->rx_skb = NULL; | |
2073 | conn->rx_len = 0; | |
2074 | l2cap_conn_unreliable(conn, ECOMM); | |
2075 | } | |
2076 | ||
2077 | if (skb->len < 2) { | |
2078 | BT_ERR("Frame is too short (len %d)", skb->len); | |
2079 | l2cap_conn_unreliable(conn, ECOMM); | |
2080 | goto drop; | |
2081 | } | |
2082 | ||
2083 | hdr = (struct l2cap_hdr *) skb->data; | |
2084 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
2085 | ||
2086 | if (len == skb->len) { | |
2087 | /* Complete frame received */ | |
2088 | l2cap_recv_frame(conn, skb); | |
2089 | return 0; | |
2090 | } | |
2091 | ||
2092 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
2093 | ||
2094 | if (skb->len > len) { | |
2095 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
2096 | skb->len, len); | |
2097 | l2cap_conn_unreliable(conn, ECOMM); | |
2098 | goto drop; | |
2099 | } | |
2100 | ||
2101 | /* Allocate skb for the complete frame (with header) */ | |
2102 | if (!(conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC))) | |
2103 | goto drop; | |
2104 | ||
2105 | memcpy(skb_put(conn->rx_skb, skb->len), skb->data, skb->len); | |
2106 | conn->rx_len = len - skb->len; | |
2107 | } else { | |
2108 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
2109 | ||
2110 | if (!conn->rx_len) { | |
2111 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
2112 | l2cap_conn_unreliable(conn, ECOMM); | |
2113 | goto drop; | |
2114 | } | |
2115 | ||
2116 | if (skb->len > conn->rx_len) { | |
2117 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
2118 | skb->len, conn->rx_len); | |
2119 | kfree_skb(conn->rx_skb); | |
2120 | conn->rx_skb = NULL; | |
2121 | conn->rx_len = 0; | |
2122 | l2cap_conn_unreliable(conn, ECOMM); | |
2123 | goto drop; | |
2124 | } | |
2125 | ||
2126 | memcpy(skb_put(conn->rx_skb, skb->len), skb->data, skb->len); | |
2127 | conn->rx_len -= skb->len; | |
2128 | ||
2129 | if (!conn->rx_len) { | |
2130 | /* Complete frame received */ | |
2131 | l2cap_recv_frame(conn, conn->rx_skb); | |
2132 | conn->rx_skb = NULL; | |
2133 | } | |
2134 | } | |
2135 | ||
2136 | drop: | |
2137 | kfree_skb(skb); | |
2138 | return 0; | |
2139 | } | |
2140 | ||
2141 | /* ---- Proc fs support ---- */ | |
2142 | #ifdef CONFIG_PROC_FS | |
2143 | static void *l2cap_seq_start(struct seq_file *seq, loff_t *pos) | |
2144 | { | |
2145 | struct sock *sk; | |
2146 | struct hlist_node *node; | |
2147 | loff_t l = *pos; | |
2148 | ||
2149 | read_lock_bh(&l2cap_sk_list.lock); | |
2150 | ||
2151 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
2152 | if (!l--) | |
2153 | goto found; | |
2154 | sk = NULL; | |
2155 | found: | |
2156 | return sk; | |
2157 | } | |
2158 | ||
2159 | static void *l2cap_seq_next(struct seq_file *seq, void *e, loff_t *pos) | |
2160 | { | |
2161 | (*pos)++; | |
2162 | return sk_next(e); | |
2163 | } | |
2164 | ||
2165 | static void l2cap_seq_stop(struct seq_file *seq, void *e) | |
2166 | { | |
2167 | read_unlock_bh(&l2cap_sk_list.lock); | |
2168 | } | |
2169 | ||
2170 | static int l2cap_seq_show(struct seq_file *seq, void *e) | |
2171 | { | |
2172 | struct sock *sk = e; | |
2173 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2174 | ||
2175 | seq_printf(seq, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d 0x%x\n", | |
2176 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), | |
2177 | sk->sk_state, pi->psm, pi->scid, pi->dcid, pi->imtu, | |
2178 | pi->omtu, pi->link_mode); | |
2179 | return 0; | |
2180 | } | |
2181 | ||
2182 | static struct seq_operations l2cap_seq_ops = { | |
2183 | .start = l2cap_seq_start, | |
2184 | .next = l2cap_seq_next, | |
2185 | .stop = l2cap_seq_stop, | |
2186 | .show = l2cap_seq_show | |
2187 | }; | |
2188 | ||
2189 | static int l2cap_seq_open(struct inode *inode, struct file *file) | |
2190 | { | |
2191 | return seq_open(file, &l2cap_seq_ops); | |
2192 | } | |
2193 | ||
2194 | static struct file_operations l2cap_seq_fops = { | |
2195 | .owner = THIS_MODULE, | |
2196 | .open = l2cap_seq_open, | |
2197 | .read = seq_read, | |
2198 | .llseek = seq_lseek, | |
2199 | .release = seq_release, | |
2200 | }; | |
2201 | ||
2202 | static int __init l2cap_proc_init(void) | |
2203 | { | |
2204 | struct proc_dir_entry *p = create_proc_entry("l2cap", S_IRUGO, proc_bt); | |
2205 | if (!p) | |
2206 | return -ENOMEM; | |
2207 | p->owner = THIS_MODULE; | |
2208 | p->proc_fops = &l2cap_seq_fops; | |
2209 | return 0; | |
2210 | } | |
2211 | ||
2212 | static void __exit l2cap_proc_cleanup(void) | |
2213 | { | |
2214 | remove_proc_entry("l2cap", proc_bt); | |
2215 | } | |
2216 | ||
2217 | #else /* CONFIG_PROC_FS */ | |
2218 | ||
2219 | static int __init l2cap_proc_init(void) | |
2220 | { | |
2221 | return 0; | |
2222 | } | |
2223 | ||
2224 | static void __exit l2cap_proc_cleanup(void) | |
2225 | { | |
2226 | return; | |
2227 | } | |
2228 | #endif /* CONFIG_PROC_FS */ | |
2229 | ||
2230 | static struct proto_ops l2cap_sock_ops = { | |
2231 | .family = PF_BLUETOOTH, | |
2232 | .owner = THIS_MODULE, | |
2233 | .release = l2cap_sock_release, | |
2234 | .bind = l2cap_sock_bind, | |
2235 | .connect = l2cap_sock_connect, | |
2236 | .listen = l2cap_sock_listen, | |
2237 | .accept = l2cap_sock_accept, | |
2238 | .getname = l2cap_sock_getname, | |
2239 | .sendmsg = l2cap_sock_sendmsg, | |
2240 | .recvmsg = bt_sock_recvmsg, | |
2241 | .poll = bt_sock_poll, | |
2242 | .mmap = sock_no_mmap, | |
2243 | .socketpair = sock_no_socketpair, | |
2244 | .ioctl = sock_no_ioctl, | |
2245 | .shutdown = l2cap_sock_shutdown, | |
2246 | .setsockopt = l2cap_sock_setsockopt, | |
2247 | .getsockopt = l2cap_sock_getsockopt | |
2248 | }; | |
2249 | ||
2250 | static struct net_proto_family l2cap_sock_family_ops = { | |
2251 | .family = PF_BLUETOOTH, | |
2252 | .owner = THIS_MODULE, | |
2253 | .create = l2cap_sock_create, | |
2254 | }; | |
2255 | ||
2256 | static struct hci_proto l2cap_hci_proto = { | |
2257 | .name = "L2CAP", | |
2258 | .id = HCI_PROTO_L2CAP, | |
2259 | .connect_ind = l2cap_connect_ind, | |
2260 | .connect_cfm = l2cap_connect_cfm, | |
2261 | .disconn_ind = l2cap_disconn_ind, | |
2262 | .auth_cfm = l2cap_auth_cfm, | |
2263 | .encrypt_cfm = l2cap_encrypt_cfm, | |
2264 | .recv_acldata = l2cap_recv_acldata | |
2265 | }; | |
2266 | ||
2267 | static int __init l2cap_init(void) | |
2268 | { | |
2269 | int err; | |
2270 | ||
2271 | err = proto_register(&l2cap_proto, 0); | |
2272 | if (err < 0) | |
2273 | return err; | |
2274 | ||
2275 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
2276 | if (err < 0) { | |
2277 | BT_ERR("L2CAP socket registration failed"); | |
2278 | goto error; | |
2279 | } | |
2280 | ||
2281 | err = hci_register_proto(&l2cap_hci_proto); | |
2282 | if (err < 0) { | |
2283 | BT_ERR("L2CAP protocol registration failed"); | |
2284 | bt_sock_unregister(BTPROTO_L2CAP); | |
2285 | goto error; | |
2286 | } | |
2287 | ||
2288 | l2cap_proc_init(); | |
2289 | ||
2290 | BT_INFO("L2CAP ver %s", VERSION); | |
2291 | BT_INFO("L2CAP socket layer initialized"); | |
2292 | ||
2293 | return 0; | |
2294 | ||
2295 | error: | |
2296 | proto_unregister(&l2cap_proto); | |
2297 | return err; | |
2298 | } | |
2299 | ||
2300 | static void __exit l2cap_exit(void) | |
2301 | { | |
2302 | l2cap_proc_cleanup(); | |
2303 | ||
2304 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
2305 | BT_ERR("L2CAP socket unregistration failed"); | |
2306 | ||
2307 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
2308 | BT_ERR("L2CAP protocol unregistration failed"); | |
2309 | ||
2310 | proto_unregister(&l2cap_proto); | |
2311 | } | |
2312 | ||
2313 | void l2cap_load(void) | |
2314 | { | |
2315 | /* Dummy function to trigger automatic L2CAP module loading by | |
2316 | * other modules that use L2CAP sockets but don't use any other | |
2317 | * symbols from it. */ | |
2318 | return; | |
2319 | } | |
2320 | EXPORT_SYMBOL(l2cap_load); | |
2321 | ||
2322 | module_init(l2cap_init); | |
2323 | module_exit(l2cap_exit); | |
2324 | ||
2325 | MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>"); | |
2326 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); | |
2327 | MODULE_VERSION(VERSION); | |
2328 | MODULE_LICENSE("GPL"); | |
2329 | MODULE_ALIAS("bt-proto-0"); |