]>
Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
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 | |
8e87d142 YH |
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 | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth L2CAP core and sockets. */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
4fc268d2 | 30 | #include <linux/capability.h> |
1da177e4 LT |
31 | #include <linux/errno.h> |
32 | #include <linux/kernel.h> | |
1da177e4 LT |
33 | #include <linux/sched.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/fcntl.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/socket.h> | |
40 | #include <linux/skbuff.h> | |
1da177e4 | 41 | #include <linux/list.h> |
be9d1227 | 42 | #include <linux/device.h> |
1da177e4 LT |
43 | #include <net/sock.h> |
44 | ||
45 | #include <asm/system.h> | |
46 | #include <asm/uaccess.h> | |
47 | #include <asm/unaligned.h> | |
48 | ||
49 | #include <net/bluetooth/bluetooth.h> | |
50 | #include <net/bluetooth/hci_core.h> | |
51 | #include <net/bluetooth/l2cap.h> | |
52 | ||
53 | #ifndef CONFIG_BT_L2CAP_DEBUG | |
54 | #undef BT_DBG | |
55 | #define BT_DBG(D...) | |
56 | #endif | |
57 | ||
be9d1227 | 58 | #define VERSION "2.8" |
1da177e4 | 59 | |
90ddc4f0 | 60 | static const struct proto_ops l2cap_sock_ops; |
1da177e4 LT |
61 | |
62 | static struct bt_sock_list l2cap_sk_list = { | |
63 | .lock = RW_LOCK_UNLOCKED | |
64 | }; | |
65 | ||
1da177e4 LT |
66 | static void __l2cap_sock_close(struct sock *sk, int reason); |
67 | static void l2cap_sock_close(struct sock *sk); | |
68 | static void l2cap_sock_kill(struct sock *sk); | |
69 | ||
70 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
71 | u8 code, u8 ident, u16 dlen, void *data); | |
72 | ||
73 | /* ---- L2CAP timers ---- */ | |
74 | static void l2cap_sock_timeout(unsigned long arg) | |
75 | { | |
76 | struct sock *sk = (struct sock *) arg; | |
77 | ||
78 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
79 | ||
80 | bh_lock_sock(sk); | |
81 | __l2cap_sock_close(sk, ETIMEDOUT); | |
82 | bh_unlock_sock(sk); | |
83 | ||
84 | l2cap_sock_kill(sk); | |
85 | sock_put(sk); | |
86 | } | |
87 | ||
88 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
89 | { | |
90 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
91 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
92 | } | |
93 | ||
94 | static void l2cap_sock_clear_timer(struct sock *sk) | |
95 | { | |
96 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
97 | sk_stop_timer(sk, &sk->sk_timer); | |
98 | } | |
99 | ||
100 | static void l2cap_sock_init_timer(struct sock *sk) | |
101 | { | |
102 | init_timer(&sk->sk_timer); | |
103 | sk->sk_timer.function = l2cap_sock_timeout; | |
104 | sk->sk_timer.data = (unsigned long)sk; | |
105 | } | |
106 | ||
0139418c MH |
107 | /* ---- L2CAP channels ---- */ |
108 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
109 | { | |
110 | struct sock *s; | |
111 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
112 | if (l2cap_pi(s)->dcid == cid) | |
113 | break; | |
114 | } | |
115 | return s; | |
116 | } | |
117 | ||
118 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
119 | { | |
120 | struct sock *s; | |
121 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
122 | if (l2cap_pi(s)->scid == cid) | |
123 | break; | |
124 | } | |
125 | return s; | |
126 | } | |
127 | ||
128 | /* Find channel with given SCID. | |
129 | * Returns locked socket */ | |
130 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
131 | { | |
132 | struct sock *s; | |
133 | read_lock(&l->lock); | |
134 | s = __l2cap_get_chan_by_scid(l, cid); | |
135 | if (s) bh_lock_sock(s); | |
136 | read_unlock(&l->lock); | |
137 | return s; | |
138 | } | |
139 | ||
140 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
141 | { | |
142 | struct sock *s; | |
143 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
144 | if (l2cap_pi(s)->ident == ident) | |
145 | break; | |
146 | } | |
147 | return s; | |
148 | } | |
149 | ||
150 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
151 | { | |
152 | struct sock *s; | |
153 | read_lock(&l->lock); | |
154 | s = __l2cap_get_chan_by_ident(l, ident); | |
155 | if (s) bh_lock_sock(s); | |
156 | read_unlock(&l->lock); | |
157 | return s; | |
158 | } | |
159 | ||
160 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
161 | { | |
162 | u16 cid = 0x0040; | |
163 | ||
164 | for (; cid < 0xffff; cid++) { | |
165 | if(!__l2cap_get_chan_by_scid(l, cid)) | |
166 | return cid; | |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
173 | { | |
174 | sock_hold(sk); | |
175 | ||
176 | if (l->head) | |
177 | l2cap_pi(l->head)->prev_c = sk; | |
178 | ||
179 | l2cap_pi(sk)->next_c = l->head; | |
180 | l2cap_pi(sk)->prev_c = NULL; | |
181 | l->head = sk; | |
182 | } | |
183 | ||
184 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
185 | { | |
186 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
187 | ||
fd1278d7 | 188 | write_lock_bh(&l->lock); |
0139418c MH |
189 | if (sk == l->head) |
190 | l->head = next; | |
191 | ||
192 | if (next) | |
193 | l2cap_pi(next)->prev_c = prev; | |
194 | if (prev) | |
195 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 196 | write_unlock_bh(&l->lock); |
0139418c MH |
197 | |
198 | __sock_put(sk); | |
199 | } | |
200 | ||
201 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
202 | { | |
203 | struct l2cap_chan_list *l = &conn->chan_list; | |
204 | ||
205 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
206 | ||
207 | l2cap_pi(sk)->conn = conn; | |
208 | ||
209 | if (sk->sk_type == SOCK_SEQPACKET) { | |
210 | /* Alloc CID for connection-oriented socket */ | |
211 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
212 | } else if (sk->sk_type == SOCK_DGRAM) { | |
213 | /* Connectionless socket */ | |
214 | l2cap_pi(sk)->scid = 0x0002; | |
215 | l2cap_pi(sk)->dcid = 0x0002; | |
216 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
217 | } else { | |
218 | /* Raw socket can send/recv signalling messages only */ | |
219 | l2cap_pi(sk)->scid = 0x0001; | |
220 | l2cap_pi(sk)->dcid = 0x0001; | |
221 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
222 | } | |
223 | ||
224 | __l2cap_chan_link(l, sk); | |
225 | ||
226 | if (parent) | |
227 | bt_accept_enqueue(parent, sk); | |
228 | } | |
229 | ||
8e87d142 | 230 | /* Delete channel. |
0139418c MH |
231 | * Must be called on the locked socket. */ |
232 | static void l2cap_chan_del(struct sock *sk, int err) | |
233 | { | |
234 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
235 | struct sock *parent = bt_sk(sk)->parent; | |
236 | ||
237 | l2cap_sock_clear_timer(sk); | |
238 | ||
239 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
240 | ||
8e87d142 | 241 | if (conn) { |
0139418c MH |
242 | /* Unlink from channel list */ |
243 | l2cap_chan_unlink(&conn->chan_list, sk); | |
244 | l2cap_pi(sk)->conn = NULL; | |
245 | hci_conn_put(conn->hcon); | |
246 | } | |
247 | ||
248 | sk->sk_state = BT_CLOSED; | |
249 | sock_set_flag(sk, SOCK_ZAPPED); | |
250 | ||
251 | if (err) | |
252 | sk->sk_err = err; | |
253 | ||
254 | if (parent) { | |
255 | bt_accept_unlink(sk); | |
256 | parent->sk_data_ready(parent, 0); | |
257 | } else | |
258 | sk->sk_state_change(sk); | |
259 | } | |
260 | ||
1da177e4 LT |
261 | /* ---- L2CAP connections ---- */ |
262 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) | |
263 | { | |
0139418c | 264 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 265 | |
0139418c | 266 | if (conn || status) |
1da177e4 LT |
267 | return conn; |
268 | ||
0139418c MH |
269 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
270 | if (!conn) | |
1da177e4 | 271 | return NULL; |
1da177e4 LT |
272 | |
273 | hcon->l2cap_data = conn; | |
274 | conn->hcon = hcon; | |
275 | ||
0139418c MH |
276 | BT_DBG("hcon %p conn %p", hcon, conn); |
277 | ||
1da177e4 LT |
278 | conn->mtu = hcon->hdev->acl_mtu; |
279 | conn->src = &hcon->hdev->bdaddr; | |
280 | conn->dst = &hcon->dst; | |
281 | ||
282 | spin_lock_init(&conn->lock); | |
283 | rwlock_init(&conn->chan_list.lock); | |
284 | ||
1da177e4 LT |
285 | return conn; |
286 | } | |
287 | ||
0139418c | 288 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 289 | { |
0139418c | 290 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
291 | struct sock *sk; |
292 | ||
0139418c MH |
293 | if (!conn) |
294 | return; | |
1da177e4 LT |
295 | |
296 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
297 | ||
298 | if (conn->rx_skb) | |
299 | kfree_skb(conn->rx_skb); | |
300 | ||
301 | /* Kill channels */ | |
302 | while ((sk = conn->chan_list.head)) { | |
303 | bh_lock_sock(sk); | |
304 | l2cap_chan_del(sk, err); | |
305 | bh_unlock_sock(sk); | |
306 | l2cap_sock_kill(sk); | |
307 | } | |
308 | ||
309 | hcon->l2cap_data = NULL; | |
310 | kfree(conn); | |
1da177e4 LT |
311 | } |
312 | ||
313 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
314 | { | |
315 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 316 | write_lock_bh(&l->lock); |
1da177e4 | 317 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 318 | write_unlock_bh(&l->lock); |
1da177e4 LT |
319 | } |
320 | ||
321 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) | |
322 | { | |
323 | u8 id; | |
324 | ||
325 | /* Get next available identificator. | |
326 | * 1 - 128 are used by kernel. | |
327 | * 129 - 199 are reserved. | |
328 | * 200 - 254 are used by utilities like l2ping, etc. | |
329 | */ | |
330 | ||
fd1278d7 | 331 | spin_lock_bh(&conn->lock); |
1da177e4 LT |
332 | |
333 | if (++conn->tx_ident > 128) | |
334 | conn->tx_ident = 1; | |
335 | ||
336 | id = conn->tx_ident; | |
337 | ||
fd1278d7 | 338 | spin_unlock_bh(&conn->lock); |
1da177e4 LT |
339 | |
340 | return id; | |
341 | } | |
342 | ||
343 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) | |
344 | { | |
345 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
346 | ||
347 | BT_DBG("code 0x%2.2x", code); | |
348 | ||
349 | if (!skb) | |
350 | return -ENOMEM; | |
351 | ||
352 | return hci_send_acl(conn->hcon, skb, 0); | |
353 | } | |
354 | ||
355 | /* ---- Socket interface ---- */ | |
8e036fc3 | 356 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
357 | { |
358 | struct sock *sk; | |
359 | struct hlist_node *node; | |
360 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
361 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
362 | goto found; | |
363 | sk = NULL; | |
364 | found: | |
365 | return sk; | |
366 | } | |
367 | ||
368 | /* Find socket with psm and source bdaddr. | |
369 | * Returns closest match. | |
370 | */ | |
8e036fc3 | 371 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
372 | { |
373 | struct sock *sk = NULL, *sk1 = NULL; | |
374 | struct hlist_node *node; | |
375 | ||
376 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
377 | if (state && sk->sk_state != state) | |
378 | continue; | |
379 | ||
380 | if (l2cap_pi(sk)->psm == psm) { | |
381 | /* Exact match. */ | |
382 | if (!bacmp(&bt_sk(sk)->src, src)) | |
383 | break; | |
384 | ||
385 | /* Closest match */ | |
386 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
387 | sk1 = sk; | |
388 | } | |
389 | } | |
390 | return node ? sk : sk1; | |
391 | } | |
392 | ||
393 | /* Find socket with given address (psm, src). | |
394 | * Returns locked socket */ | |
8e036fc3 | 395 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
396 | { |
397 | struct sock *s; | |
398 | read_lock(&l2cap_sk_list.lock); | |
399 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
400 | if (s) bh_lock_sock(s); | |
401 | read_unlock(&l2cap_sk_list.lock); | |
402 | return s; | |
403 | } | |
404 | ||
405 | static void l2cap_sock_destruct(struct sock *sk) | |
406 | { | |
407 | BT_DBG("sk %p", sk); | |
408 | ||
409 | skb_queue_purge(&sk->sk_receive_queue); | |
410 | skb_queue_purge(&sk->sk_write_queue); | |
411 | } | |
412 | ||
413 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
414 | { | |
415 | struct sock *sk; | |
416 | ||
417 | BT_DBG("parent %p", parent); | |
418 | ||
419 | /* Close not yet accepted channels */ | |
420 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
421 | l2cap_sock_close(sk); | |
422 | ||
423 | parent->sk_state = BT_CLOSED; | |
424 | sock_set_flag(parent, SOCK_ZAPPED); | |
425 | } | |
426 | ||
427 | /* Kill socket (only if zapped and orphan) | |
428 | * Must be called on unlocked socket. | |
429 | */ | |
430 | static void l2cap_sock_kill(struct sock *sk) | |
431 | { | |
432 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
433 | return; | |
434 | ||
435 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
436 | ||
437 | /* Kill poor orphan */ | |
438 | bt_sock_unlink(&l2cap_sk_list, sk); | |
439 | sock_set_flag(sk, SOCK_DEAD); | |
440 | sock_put(sk); | |
441 | } | |
442 | ||
443 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
444 | { | |
445 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
446 | ||
447 | switch (sk->sk_state) { | |
448 | case BT_LISTEN: | |
449 | l2cap_sock_cleanup_listen(sk); | |
450 | break; | |
451 | ||
452 | case BT_CONNECTED: | |
453 | case BT_CONFIG: | |
454 | case BT_CONNECT2: | |
455 | if (sk->sk_type == SOCK_SEQPACKET) { | |
456 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
457 | struct l2cap_disconn_req req; | |
458 | ||
459 | sk->sk_state = BT_DISCONN; | |
460 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
461 | ||
aca3192c YH |
462 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
463 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
464 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
465 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
466 | } else { | |
467 | l2cap_chan_del(sk, reason); | |
468 | } | |
469 | break; | |
470 | ||
471 | case BT_CONNECT: | |
472 | case BT_DISCONN: | |
473 | l2cap_chan_del(sk, reason); | |
474 | break; | |
475 | ||
476 | default: | |
477 | sock_set_flag(sk, SOCK_ZAPPED); | |
478 | break; | |
479 | } | |
480 | } | |
481 | ||
482 | /* Must be called on unlocked socket. */ | |
483 | static void l2cap_sock_close(struct sock *sk) | |
484 | { | |
485 | l2cap_sock_clear_timer(sk); | |
486 | lock_sock(sk); | |
487 | __l2cap_sock_close(sk, ECONNRESET); | |
488 | release_sock(sk); | |
489 | l2cap_sock_kill(sk); | |
490 | } | |
491 | ||
492 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
493 | { | |
494 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
495 | ||
496 | BT_DBG("sk %p", sk); | |
497 | ||
498 | if (parent) { | |
499 | sk->sk_type = parent->sk_type; | |
500 | pi->imtu = l2cap_pi(parent)->imtu; | |
501 | pi->omtu = l2cap_pi(parent)->omtu; | |
502 | pi->link_mode = l2cap_pi(parent)->link_mode; | |
503 | } else { | |
504 | pi->imtu = L2CAP_DEFAULT_MTU; | |
505 | pi->omtu = 0; | |
506 | pi->link_mode = 0; | |
507 | } | |
508 | ||
509 | /* Default config options */ | |
5dee9e7c | 510 | pi->conf_len = 0; |
1da177e4 LT |
511 | pi->conf_mtu = L2CAP_DEFAULT_MTU; |
512 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; | |
513 | } | |
514 | ||
515 | static struct proto l2cap_proto = { | |
516 | .name = "L2CAP", | |
517 | .owner = THIS_MODULE, | |
518 | .obj_size = sizeof(struct l2cap_pinfo) | |
519 | }; | |
520 | ||
dd0fc66f | 521 | static struct sock *l2cap_sock_alloc(struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
522 | { |
523 | struct sock *sk; | |
524 | ||
525 | sk = sk_alloc(PF_BLUETOOTH, prio, &l2cap_proto, 1); | |
526 | if (!sk) | |
527 | return NULL; | |
528 | ||
529 | sock_init_data(sock, sk); | |
530 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
531 | ||
532 | sk->sk_destruct = l2cap_sock_destruct; | |
533 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; | |
534 | ||
535 | sock_reset_flag(sk, SOCK_ZAPPED); | |
536 | ||
537 | sk->sk_protocol = proto; | |
538 | sk->sk_state = BT_OPEN; | |
539 | ||
540 | l2cap_sock_init_timer(sk); | |
541 | ||
542 | bt_sock_link(&l2cap_sk_list, sk); | |
543 | return sk; | |
544 | } | |
545 | ||
546 | static int l2cap_sock_create(struct socket *sock, int protocol) | |
547 | { | |
548 | struct sock *sk; | |
549 | ||
550 | BT_DBG("sock %p", sock); | |
551 | ||
552 | sock->state = SS_UNCONNECTED; | |
553 | ||
554 | if (sock->type != SOCK_SEQPACKET && | |
555 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
556 | return -ESOCKTNOSUPPORT; | |
557 | ||
558 | if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW)) | |
559 | return -EPERM; | |
560 | ||
561 | sock->ops = &l2cap_sock_ops; | |
562 | ||
74da626a | 563 | sk = l2cap_sock_alloc(sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
564 | if (!sk) |
565 | return -ENOMEM; | |
566 | ||
567 | l2cap_sock_init(sk, NULL); | |
568 | return 0; | |
569 | } | |
570 | ||
571 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
572 | { | |
573 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
574 | struct sock *sk = sock->sk; | |
575 | int err = 0; | |
576 | ||
577 | BT_DBG("sk %p, %s %d", sk, batostr(&la->l2_bdaddr), la->l2_psm); | |
578 | ||
579 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
580 | return -EINVAL; | |
581 | ||
582 | lock_sock(sk); | |
583 | ||
584 | if (sk->sk_state != BT_OPEN) { | |
585 | err = -EBADFD; | |
586 | goto done; | |
587 | } | |
588 | ||
8e036fc3 | 589 | if (la->l2_psm && btohs(la->l2_psm) < 0x1001 && |
847641d7 MH |
590 | !capable(CAP_NET_BIND_SERVICE)) { |
591 | err = -EACCES; | |
592 | goto done; | |
593 | } | |
8e87d142 | 594 | |
1da177e4 LT |
595 | write_lock_bh(&l2cap_sk_list.lock); |
596 | ||
597 | if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) { | |
598 | err = -EADDRINUSE; | |
599 | } else { | |
600 | /* Save source address */ | |
601 | bacpy(&bt_sk(sk)->src, &la->l2_bdaddr); | |
602 | l2cap_pi(sk)->psm = la->l2_psm; | |
603 | l2cap_pi(sk)->sport = la->l2_psm; | |
604 | sk->sk_state = BT_BOUND; | |
605 | } | |
606 | ||
607 | write_unlock_bh(&l2cap_sk_list.lock); | |
608 | ||
609 | done: | |
610 | release_sock(sk); | |
611 | return err; | |
612 | } | |
613 | ||
614 | static int l2cap_do_connect(struct sock *sk) | |
615 | { | |
616 | bdaddr_t *src = &bt_sk(sk)->src; | |
617 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
618 | struct l2cap_conn *conn; | |
619 | struct hci_conn *hcon; | |
620 | struct hci_dev *hdev; | |
621 | int err = 0; | |
622 | ||
623 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), l2cap_pi(sk)->psm); | |
624 | ||
625 | if (!(hdev = hci_get_route(dst, src))) | |
626 | return -EHOSTUNREACH; | |
627 | ||
628 | hci_dev_lock_bh(hdev); | |
629 | ||
630 | err = -ENOMEM; | |
631 | ||
632 | hcon = hci_connect(hdev, ACL_LINK, dst); | |
633 | if (!hcon) | |
634 | goto done; | |
635 | ||
636 | conn = l2cap_conn_add(hcon, 0); | |
637 | if (!conn) { | |
638 | hci_conn_put(hcon); | |
639 | goto done; | |
640 | } | |
641 | ||
642 | err = 0; | |
643 | ||
644 | /* Update source addr of the socket */ | |
645 | bacpy(src, conn->src); | |
646 | ||
647 | l2cap_chan_add(conn, sk, NULL); | |
648 | ||
649 | sk->sk_state = BT_CONNECT; | |
650 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
651 | ||
652 | if (hcon->state == BT_CONNECTED) { | |
653 | if (sk->sk_type == SOCK_SEQPACKET) { | |
654 | struct l2cap_conn_req req; | |
655 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); | |
aca3192c | 656 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
1da177e4 LT |
657 | req.psm = l2cap_pi(sk)->psm; |
658 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
659 | L2CAP_CONN_REQ, sizeof(req), &req); | |
660 | } else { | |
661 | l2cap_sock_clear_timer(sk); | |
662 | sk->sk_state = BT_CONNECTED; | |
663 | } | |
664 | } | |
665 | ||
666 | done: | |
667 | hci_dev_unlock_bh(hdev); | |
668 | hci_dev_put(hdev); | |
669 | return err; | |
670 | } | |
671 | ||
672 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
673 | { | |
674 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
675 | struct sock *sk = sock->sk; | |
676 | int err = 0; | |
677 | ||
678 | lock_sock(sk); | |
679 | ||
680 | BT_DBG("sk %p", sk); | |
681 | ||
682 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_l2)) { | |
683 | err = -EINVAL; | |
684 | goto done; | |
685 | } | |
686 | ||
687 | if (sk->sk_type == SOCK_SEQPACKET && !la->l2_psm) { | |
688 | err = -EINVAL; | |
689 | goto done; | |
690 | } | |
691 | ||
692 | switch(sk->sk_state) { | |
693 | case BT_CONNECT: | |
694 | case BT_CONNECT2: | |
695 | case BT_CONFIG: | |
696 | /* Already connecting */ | |
697 | goto wait; | |
698 | ||
699 | case BT_CONNECTED: | |
700 | /* Already connected */ | |
701 | goto done; | |
702 | ||
703 | case BT_OPEN: | |
704 | case BT_BOUND: | |
705 | /* Can connect */ | |
706 | break; | |
707 | ||
708 | default: | |
709 | err = -EBADFD; | |
710 | goto done; | |
711 | } | |
712 | ||
713 | /* Set destination address and psm */ | |
714 | bacpy(&bt_sk(sk)->dst, &la->l2_bdaddr); | |
715 | l2cap_pi(sk)->psm = la->l2_psm; | |
716 | ||
717 | if ((err = l2cap_do_connect(sk))) | |
718 | goto done; | |
719 | ||
720 | wait: | |
721 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
722 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
723 | done: | |
724 | release_sock(sk); | |
725 | return err; | |
726 | } | |
727 | ||
728 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
729 | { | |
730 | struct sock *sk = sock->sk; | |
731 | int err = 0; | |
732 | ||
733 | BT_DBG("sk %p backlog %d", sk, backlog); | |
734 | ||
735 | lock_sock(sk); | |
736 | ||
737 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
738 | err = -EBADFD; | |
739 | goto done; | |
740 | } | |
741 | ||
742 | if (!l2cap_pi(sk)->psm) { | |
743 | bdaddr_t *src = &bt_sk(sk)->src; | |
744 | u16 psm; | |
745 | ||
746 | err = -EINVAL; | |
747 | ||
748 | write_lock_bh(&l2cap_sk_list.lock); | |
749 | ||
750 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
6dc0c208 | 751 | if (!__l2cap_get_sock_by_addr(htobs(psm), src)) { |
1da177e4 LT |
752 | l2cap_pi(sk)->psm = htobs(psm); |
753 | l2cap_pi(sk)->sport = htobs(psm); | |
754 | err = 0; | |
755 | break; | |
756 | } | |
757 | ||
758 | write_unlock_bh(&l2cap_sk_list.lock); | |
759 | ||
760 | if (err < 0) | |
761 | goto done; | |
762 | } | |
763 | ||
764 | sk->sk_max_ack_backlog = backlog; | |
765 | sk->sk_ack_backlog = 0; | |
766 | sk->sk_state = BT_LISTEN; | |
767 | ||
768 | done: | |
769 | release_sock(sk); | |
770 | return err; | |
771 | } | |
772 | ||
773 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
774 | { | |
775 | DECLARE_WAITQUEUE(wait, current); | |
776 | struct sock *sk = sock->sk, *nsk; | |
777 | long timeo; | |
778 | int err = 0; | |
779 | ||
fcc70d5f | 780 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
781 | |
782 | if (sk->sk_state != BT_LISTEN) { | |
783 | err = -EBADFD; | |
784 | goto done; | |
785 | } | |
786 | ||
787 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
788 | ||
789 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
790 | ||
791 | /* Wait for an incoming connection. (wake-one). */ | |
792 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
793 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
794 | set_current_state(TASK_INTERRUPTIBLE); | |
795 | if (!timeo) { | |
796 | err = -EAGAIN; | |
797 | break; | |
798 | } | |
799 | ||
800 | release_sock(sk); | |
801 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 802 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
803 | |
804 | if (sk->sk_state != BT_LISTEN) { | |
805 | err = -EBADFD; | |
806 | break; | |
807 | } | |
808 | ||
809 | if (signal_pending(current)) { | |
810 | err = sock_intr_errno(timeo); | |
811 | break; | |
812 | } | |
813 | } | |
814 | set_current_state(TASK_RUNNING); | |
815 | remove_wait_queue(sk->sk_sleep, &wait); | |
816 | ||
817 | if (err) | |
818 | goto done; | |
819 | ||
820 | newsock->state = SS_CONNECTED; | |
821 | ||
822 | BT_DBG("new socket %p", nsk); | |
823 | ||
824 | done: | |
825 | release_sock(sk); | |
826 | return err; | |
827 | } | |
828 | ||
829 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
830 | { | |
831 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
832 | struct sock *sk = sock->sk; | |
833 | ||
834 | BT_DBG("sock %p, sk %p", sock, sk); | |
835 | ||
836 | addr->sa_family = AF_BLUETOOTH; | |
837 | *len = sizeof(struct sockaddr_l2); | |
838 | ||
839 | if (peer) | |
840 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); | |
841 | else | |
842 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); | |
843 | ||
844 | la->l2_psm = l2cap_pi(sk)->psm; | |
845 | return 0; | |
846 | } | |
847 | ||
848 | static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len) | |
849 | { | |
850 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
851 | struct sk_buff *skb, **frag; | |
852 | int err, hlen, count, sent=0; | |
853 | struct l2cap_hdr *lh; | |
854 | ||
855 | BT_DBG("sk %p len %d", sk, len); | |
856 | ||
857 | /* First fragment (with L2CAP header) */ | |
858 | if (sk->sk_type == SOCK_DGRAM) | |
859 | hlen = L2CAP_HDR_SIZE + 2; | |
860 | else | |
861 | hlen = L2CAP_HDR_SIZE; | |
862 | ||
863 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
864 | ||
865 | skb = bt_skb_send_alloc(sk, hlen + count, | |
866 | msg->msg_flags & MSG_DONTWAIT, &err); | |
867 | if (!skb) | |
868 | return err; | |
869 | ||
870 | /* Create L2CAP header */ | |
871 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
872 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
873 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1da177e4 LT |
874 | |
875 | if (sk->sk_type == SOCK_DGRAM) | |
8e036fc3 | 876 | put_unaligned(l2cap_pi(sk)->psm, (__le16 *) skb_put(skb, 2)); |
1da177e4 LT |
877 | |
878 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
879 | err = -EFAULT; | |
880 | goto fail; | |
881 | } | |
882 | ||
883 | sent += count; | |
884 | len -= count; | |
885 | ||
886 | /* Continuation fragments (no L2CAP header) */ | |
887 | frag = &skb_shinfo(skb)->frag_list; | |
888 | while (len) { | |
889 | count = min_t(unsigned int, conn->mtu, len); | |
890 | ||
891 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
892 | if (!*frag) | |
893 | goto fail; | |
8e87d142 | 894 | |
1da177e4 LT |
895 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) { |
896 | err = -EFAULT; | |
897 | goto fail; | |
898 | } | |
899 | ||
900 | sent += count; | |
901 | len -= count; | |
902 | ||
903 | frag = &(*frag)->next; | |
904 | } | |
905 | ||
906 | if ((err = hci_send_acl(conn->hcon, skb, 0)) < 0) | |
907 | goto fail; | |
908 | ||
909 | return sent; | |
910 | ||
911 | fail: | |
912 | kfree_skb(skb); | |
913 | return err; | |
914 | } | |
915 | ||
916 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
917 | { | |
918 | struct sock *sk = sock->sk; | |
919 | int err = 0; | |
920 | ||
921 | BT_DBG("sock %p, sk %p", sock, sk); | |
922 | ||
c1cbe4b7 BL |
923 | err = sock_error(sk); |
924 | if (err) | |
925 | return err; | |
1da177e4 LT |
926 | |
927 | if (msg->msg_flags & MSG_OOB) | |
928 | return -EOPNOTSUPP; | |
929 | ||
930 | /* Check outgoing MTU */ | |
931 | if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu) | |
932 | return -EINVAL; | |
933 | ||
934 | lock_sock(sk); | |
935 | ||
936 | if (sk->sk_state == BT_CONNECTED) | |
937 | err = l2cap_do_send(sk, msg, len); | |
938 | else | |
939 | err = -ENOTCONN; | |
940 | ||
941 | release_sock(sk); | |
942 | return err; | |
943 | } | |
944 | ||
945 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) | |
946 | { | |
947 | struct sock *sk = sock->sk; | |
948 | struct l2cap_options opts; | |
949 | int err = 0, len; | |
950 | u32 opt; | |
951 | ||
952 | BT_DBG("sk %p", sk); | |
953 | ||
954 | lock_sock(sk); | |
955 | ||
956 | switch (optname) { | |
957 | case L2CAP_OPTIONS: | |
0878b666 MH |
958 | opts.imtu = l2cap_pi(sk)->imtu; |
959 | opts.omtu = l2cap_pi(sk)->omtu; | |
960 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
961 | opts.mode = 0x00; | |
962 | ||
1da177e4 LT |
963 | len = min_t(unsigned int, sizeof(opts), optlen); |
964 | if (copy_from_user((char *) &opts, optval, len)) { | |
965 | err = -EFAULT; | |
966 | break; | |
967 | } | |
0878b666 | 968 | |
1da177e4 LT |
969 | l2cap_pi(sk)->imtu = opts.imtu; |
970 | l2cap_pi(sk)->omtu = opts.omtu; | |
971 | break; | |
972 | ||
973 | case L2CAP_LM: | |
974 | if (get_user(opt, (u32 __user *) optval)) { | |
975 | err = -EFAULT; | |
976 | break; | |
977 | } | |
978 | ||
979 | l2cap_pi(sk)->link_mode = opt; | |
980 | break; | |
981 | ||
982 | default: | |
983 | err = -ENOPROTOOPT; | |
984 | break; | |
985 | } | |
986 | ||
987 | release_sock(sk); | |
988 | return err; | |
989 | } | |
990 | ||
991 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
992 | { | |
993 | struct sock *sk = sock->sk; | |
994 | struct l2cap_options opts; | |
995 | struct l2cap_conninfo cinfo; | |
996 | int len, err = 0; | |
997 | ||
998 | BT_DBG("sk %p", sk); | |
999 | ||
1000 | if (get_user(len, optlen)) | |
1001 | return -EFAULT; | |
1002 | ||
1003 | lock_sock(sk); | |
1004 | ||
1005 | switch (optname) { | |
1006 | case L2CAP_OPTIONS: | |
1007 | opts.imtu = l2cap_pi(sk)->imtu; | |
1008 | opts.omtu = l2cap_pi(sk)->omtu; | |
1009 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
1010 | opts.mode = 0x00; | |
1011 | ||
1012 | len = min_t(unsigned int, len, sizeof(opts)); | |
1013 | if (copy_to_user(optval, (char *) &opts, len)) | |
1014 | err = -EFAULT; | |
1015 | ||
1016 | break; | |
1017 | ||
1018 | case L2CAP_LM: | |
1019 | if (put_user(l2cap_pi(sk)->link_mode, (u32 __user *) optval)) | |
1020 | err = -EFAULT; | |
1021 | break; | |
1022 | ||
1023 | case L2CAP_CONNINFO: | |
1024 | if (sk->sk_state != BT_CONNECTED) { | |
1025 | err = -ENOTCONN; | |
1026 | break; | |
1027 | } | |
1028 | ||
1029 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
1030 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
1031 | ||
1032 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
1033 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
1034 | err = -EFAULT; | |
1035 | ||
1036 | break; | |
1037 | ||
1038 | default: | |
1039 | err = -ENOPROTOOPT; | |
1040 | break; | |
1041 | } | |
1042 | ||
1043 | release_sock(sk); | |
1044 | return err; | |
1045 | } | |
1046 | ||
1047 | static int l2cap_sock_shutdown(struct socket *sock, int how) | |
1048 | { | |
1049 | struct sock *sk = sock->sk; | |
1050 | int err = 0; | |
1051 | ||
1052 | BT_DBG("sock %p, sk %p", sock, sk); | |
1053 | ||
1054 | if (!sk) | |
1055 | return 0; | |
1056 | ||
1057 | lock_sock(sk); | |
1058 | if (!sk->sk_shutdown) { | |
1059 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1060 | l2cap_sock_clear_timer(sk); | |
1061 | __l2cap_sock_close(sk, 0); | |
1062 | ||
1063 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
1064 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
1065 | } | |
1066 | release_sock(sk); | |
1067 | return err; | |
1068 | } | |
1069 | ||
1070 | static int l2cap_sock_release(struct socket *sock) | |
1071 | { | |
1072 | struct sock *sk = sock->sk; | |
1073 | int err; | |
1074 | ||
1075 | BT_DBG("sock %p, sk %p", sock, sk); | |
1076 | ||
1077 | if (!sk) | |
1078 | return 0; | |
1079 | ||
1080 | err = l2cap_sock_shutdown(sock, 2); | |
1081 | ||
1082 | sock_orphan(sk); | |
1083 | l2cap_sock_kill(sk); | |
1084 | return err; | |
1085 | } | |
1086 | ||
1da177e4 LT |
1087 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
1088 | { | |
1089 | struct l2cap_chan_list *l = &conn->chan_list; | |
1090 | struct sock *sk; | |
1091 | ||
1092 | BT_DBG("conn %p", conn); | |
1093 | ||
1094 | read_lock(&l->lock); | |
1095 | ||
1096 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1097 | bh_lock_sock(sk); | |
1098 | ||
1099 | if (sk->sk_type != SOCK_SEQPACKET) { | |
1100 | l2cap_sock_clear_timer(sk); | |
1101 | sk->sk_state = BT_CONNECTED; | |
1102 | sk->sk_state_change(sk); | |
1103 | } else if (sk->sk_state == BT_CONNECT) { | |
1104 | struct l2cap_conn_req req; | |
1105 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); | |
aca3192c | 1106 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
1da177e4 LT |
1107 | req.psm = l2cap_pi(sk)->psm; |
1108 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, L2CAP_CONN_REQ, sizeof(req), &req); | |
1109 | } | |
1110 | ||
1111 | bh_unlock_sock(sk); | |
1112 | } | |
1113 | ||
1114 | read_unlock(&l->lock); | |
1115 | } | |
1116 | ||
1117 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
1118 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
1119 | { | |
1120 | struct l2cap_chan_list *l = &conn->chan_list; | |
1121 | struct sock *sk; | |
1122 | ||
1123 | BT_DBG("conn %p", conn); | |
1124 | ||
1125 | read_lock(&l->lock); | |
1126 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1127 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_RELIABLE) | |
1128 | sk->sk_err = err; | |
1129 | } | |
1130 | read_unlock(&l->lock); | |
1131 | } | |
1132 | ||
1133 | static void l2cap_chan_ready(struct sock *sk) | |
1134 | { | |
1135 | struct sock *parent = bt_sk(sk)->parent; | |
1136 | ||
1137 | BT_DBG("sk %p, parent %p", sk, parent); | |
1138 | ||
1139 | l2cap_pi(sk)->conf_state = 0; | |
1140 | l2cap_sock_clear_timer(sk); | |
1141 | ||
1142 | if (!parent) { | |
1143 | /* Outgoing channel. | |
1144 | * Wake up socket sleeping on connect. | |
1145 | */ | |
1146 | sk->sk_state = BT_CONNECTED; | |
1147 | sk->sk_state_change(sk); | |
1148 | } else { | |
1149 | /* Incoming channel. | |
1150 | * Wake up socket sleeping on accept. | |
1151 | */ | |
1152 | parent->sk_data_ready(parent, 0); | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | /* Copy frame to all raw sockets on that connection */ | |
1157 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
1158 | { | |
1159 | struct l2cap_chan_list *l = &conn->chan_list; | |
1160 | struct sk_buff *nskb; | |
1161 | struct sock * sk; | |
1162 | ||
1163 | BT_DBG("conn %p", conn); | |
1164 | ||
1165 | read_lock(&l->lock); | |
1166 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1167 | if (sk->sk_type != SOCK_RAW) | |
1168 | continue; | |
1169 | ||
1170 | /* Don't send frame to the socket it came from */ | |
1171 | if (skb->sk == sk) | |
1172 | continue; | |
1173 | ||
1174 | if (!(nskb = skb_clone(skb, GFP_ATOMIC))) | |
1175 | continue; | |
1176 | ||
1177 | if (sock_queue_rcv_skb(sk, nskb)) | |
1178 | kfree_skb(nskb); | |
1179 | } | |
1180 | read_unlock(&l->lock); | |
1181 | } | |
1182 | ||
1183 | /* ---- L2CAP signalling commands ---- */ | |
1184 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
1185 | u8 code, u8 ident, u16 dlen, void *data) | |
1186 | { | |
1187 | struct sk_buff *skb, **frag; | |
1188 | struct l2cap_cmd_hdr *cmd; | |
1189 | struct l2cap_hdr *lh; | |
1190 | int len, count; | |
1191 | ||
1192 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", conn, code, ident, dlen); | |
1193 | ||
1194 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
1195 | count = min_t(unsigned int, conn->mtu, len); | |
1196 | ||
1197 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
1198 | if (!skb) | |
1199 | return NULL; | |
1200 | ||
1201 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
1202 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
1203 | lh->cid = cpu_to_le16(0x0001); | |
1da177e4 LT |
1204 | |
1205 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
1206 | cmd->code = code; | |
1207 | cmd->ident = ident; | |
aca3192c | 1208 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
1209 | |
1210 | if (dlen) { | |
1211 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
1212 | memcpy(skb_put(skb, count), data, count); | |
1213 | data += count; | |
1214 | } | |
1215 | ||
1216 | len -= skb->len; | |
1217 | ||
1218 | /* Continuation fragments (no L2CAP header) */ | |
1219 | frag = &skb_shinfo(skb)->frag_list; | |
1220 | while (len) { | |
1221 | count = min_t(unsigned int, conn->mtu, len); | |
1222 | ||
1223 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
1224 | if (!*frag) | |
1225 | goto fail; | |
1226 | ||
1227 | memcpy(skb_put(*frag, count), data, count); | |
1228 | ||
1229 | len -= count; | |
1230 | data += count; | |
1231 | ||
1232 | frag = &(*frag)->next; | |
1233 | } | |
1234 | ||
1235 | return skb; | |
1236 | ||
1237 | fail: | |
1238 | kfree_skb(skb); | |
1239 | return NULL; | |
1240 | } | |
1241 | ||
1242 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
1243 | { | |
1244 | struct l2cap_conf_opt *opt = *ptr; | |
1245 | int len; | |
1246 | ||
1247 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
1248 | *ptr += len; | |
1249 | ||
1250 | *type = opt->type; | |
1251 | *olen = opt->len; | |
1252 | ||
1253 | switch (opt->len) { | |
1254 | case 1: | |
1255 | *val = *((u8 *) opt->val); | |
1256 | break; | |
1257 | ||
1258 | case 2: | |
8e036fc3 | 1259 | *val = __le16_to_cpu(*((__le16 *)opt->val)); |
1da177e4 LT |
1260 | break; |
1261 | ||
1262 | case 4: | |
8e036fc3 | 1263 | *val = __le32_to_cpu(*((__le32 *)opt->val)); |
1da177e4 LT |
1264 | break; |
1265 | ||
1266 | default: | |
1267 | *val = (unsigned long) opt->val; | |
1268 | break; | |
1269 | } | |
1270 | ||
1271 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
1272 | return len; | |
1273 | } | |
1274 | ||
1da177e4 LT |
1275 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
1276 | { | |
1277 | struct l2cap_conf_opt *opt = *ptr; | |
1278 | ||
1279 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
1280 | ||
1281 | opt->type = type; | |
1282 | opt->len = len; | |
1283 | ||
1284 | switch (len) { | |
1285 | case 1: | |
1286 | *((u8 *) opt->val) = val; | |
1287 | break; | |
1288 | ||
1289 | case 2: | |
8e036fc3 | 1290 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
1291 | break; |
1292 | ||
1293 | case 4: | |
8e036fc3 | 1294 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
1295 | break; |
1296 | ||
1297 | default: | |
1298 | memcpy(opt->val, (void *) val, len); | |
1299 | break; | |
1300 | } | |
1301 | ||
1302 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
1303 | } | |
1304 | ||
1305 | static int l2cap_build_conf_req(struct sock *sk, void *data) | |
1306 | { | |
1307 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1308 | struct l2cap_conf_req *req = data; | |
1309 | void *ptr = req->data; | |
1310 | ||
1311 | BT_DBG("sk %p", sk); | |
1312 | ||
1313 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
1314 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
1315 | ||
1316 | /* FIXME: Need actual value of the flush timeout */ | |
1317 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
1318 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
1319 | ||
aca3192c YH |
1320 | req->dcid = cpu_to_le16(pi->dcid); |
1321 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
1322 | |
1323 | return ptr - data; | |
1324 | } | |
1325 | ||
5dee9e7c | 1326 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
1327 | { |
1328 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
1329 | struct l2cap_conf_rsp *rsp = data; |
1330 | void *ptr = rsp->data; | |
1331 | void *req = pi->conf_req; | |
1332 | int len = pi->conf_len; | |
1333 | int type, hint, olen; | |
1334 | unsigned long val; | |
1335 | u16 result = L2CAP_CONF_SUCCESS; | |
1da177e4 | 1336 | |
5dee9e7c | 1337 | BT_DBG("sk %p", sk); |
820ae1b8 | 1338 | |
5dee9e7c MH |
1339 | while (len >= L2CAP_CONF_OPT_SIZE) { |
1340 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 1341 | |
5dee9e7c MH |
1342 | hint = type & 0x80; |
1343 | type &= 0x7f; | |
1344 | ||
1345 | switch (type) { | |
1346 | case L2CAP_CONF_MTU: | |
1347 | pi->conf_mtu = val; | |
1348 | break; | |
1349 | ||
1350 | case L2CAP_CONF_FLUSH_TO: | |
1351 | pi->flush_to = val; | |
1352 | break; | |
1353 | ||
1354 | case L2CAP_CONF_QOS: | |
1355 | break; | |
1356 | ||
1357 | default: | |
1358 | if (hint) | |
1359 | break; | |
1360 | ||
1361 | result = L2CAP_CONF_UNKNOWN; | |
1362 | *((u8 *) ptr++) = type; | |
1363 | break; | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | if (result == L2CAP_CONF_SUCCESS) { | |
1368 | /* Configure output options and let the other side know | |
1369 | * which ones we don't like. */ | |
1370 | ||
1371 | if (pi->conf_mtu < pi->omtu) | |
1372 | result = L2CAP_CONF_UNACCEPT; | |
1373 | else | |
1374 | pi->omtu = pi->conf_mtu; | |
1375 | ||
1376 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
1377 | } | |
1378 | ||
1379 | rsp->scid = cpu_to_le16(pi->dcid); | |
1380 | rsp->result = cpu_to_le16(result); | |
1381 | rsp->flags = cpu_to_le16(0x0000); | |
1382 | ||
1383 | return ptr - data; | |
1da177e4 LT |
1384 | } |
1385 | ||
5dee9e7c | 1386 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
1387 | { |
1388 | struct l2cap_conf_rsp *rsp = data; | |
1389 | void *ptr = rsp->data; | |
1da177e4 | 1390 | |
5dee9e7c | 1391 | BT_DBG("sk %p", sk); |
1da177e4 | 1392 | |
aca3192c | 1393 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 1394 | rsp->result = cpu_to_le16(result); |
aca3192c | 1395 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
1396 | |
1397 | return ptr - data; | |
1398 | } | |
1399 | ||
1400 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1401 | { | |
1402 | struct l2cap_chan_list *list = &conn->chan_list; | |
1403 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
1404 | struct l2cap_conn_rsp rsp; | |
1405 | struct sock *sk, *parent; | |
1406 | int result = 0, status = 0; | |
1407 | ||
1408 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
8e036fc3 | 1409 | __le16 psm = req->psm; |
1da177e4 LT |
1410 | |
1411 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
1412 | ||
1413 | /* Check if we have socket listening on psm */ | |
1414 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
1415 | if (!parent) { | |
1416 | result = L2CAP_CR_BAD_PSM; | |
1417 | goto sendresp; | |
1418 | } | |
1419 | ||
1420 | result = L2CAP_CR_NO_MEM; | |
1421 | ||
1422 | /* Check for backlog size */ | |
1423 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 1424 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
1425 | goto response; |
1426 | } | |
1427 | ||
1428 | sk = l2cap_sock_alloc(NULL, BTPROTO_L2CAP, GFP_ATOMIC); | |
1429 | if (!sk) | |
1430 | goto response; | |
1431 | ||
fd1278d7 | 1432 | write_lock_bh(&list->lock); |
1da177e4 LT |
1433 | |
1434 | /* Check if we already have channel with that dcid */ | |
1435 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 1436 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1437 | sock_set_flag(sk, SOCK_ZAPPED); |
1438 | l2cap_sock_kill(sk); | |
1439 | goto response; | |
1440 | } | |
1441 | ||
1442 | hci_conn_hold(conn->hcon); | |
1443 | ||
1444 | l2cap_sock_init(sk, parent); | |
1445 | bacpy(&bt_sk(sk)->src, conn->src); | |
1446 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
1447 | l2cap_pi(sk)->psm = psm; | |
1448 | l2cap_pi(sk)->dcid = scid; | |
1449 | ||
1450 | __l2cap_chan_add(conn, sk, parent); | |
1451 | dcid = l2cap_pi(sk)->scid; | |
1452 | ||
1453 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1454 | ||
1455 | /* Service level security */ | |
1456 | result = L2CAP_CR_PEND; | |
1457 | status = L2CAP_CS_AUTHEN_PEND; | |
1458 | sk->sk_state = BT_CONNECT2; | |
1459 | l2cap_pi(sk)->ident = cmd->ident; | |
1460 | ||
1461 | if ((l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) || | |
1462 | (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) { | |
1463 | if (!hci_conn_encrypt(conn->hcon)) | |
1464 | goto done; | |
1465 | } else if (l2cap_pi(sk)->link_mode & L2CAP_LM_AUTH) { | |
1466 | if (!hci_conn_auth(conn->hcon)) | |
1467 | goto done; | |
1468 | } | |
1469 | ||
1470 | sk->sk_state = BT_CONFIG; | |
1471 | result = status = 0; | |
1472 | ||
1473 | done: | |
fd1278d7 | 1474 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1475 | |
1476 | response: | |
1477 | bh_unlock_sock(parent); | |
1478 | ||
1479 | sendresp: | |
aca3192c YH |
1480 | rsp.scid = cpu_to_le16(scid); |
1481 | rsp.dcid = cpu_to_le16(dcid); | |
1482 | rsp.result = cpu_to_le16(result); | |
1483 | rsp.status = cpu_to_le16(status); | |
1da177e4 LT |
1484 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
1485 | return 0; | |
1486 | } | |
1487 | ||
1488 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1489 | { | |
1490 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
1491 | u16 scid, dcid, result, status; | |
1492 | struct sock *sk; | |
1493 | u8 req[128]; | |
1494 | ||
1495 | scid = __le16_to_cpu(rsp->scid); | |
1496 | dcid = __le16_to_cpu(rsp->dcid); | |
1497 | result = __le16_to_cpu(rsp->result); | |
1498 | status = __le16_to_cpu(rsp->status); | |
1499 | ||
1500 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
1501 | ||
1502 | if (scid) { | |
1503 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1504 | return 0; | |
1505 | } else { | |
1506 | if (!(sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident))) | |
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | switch (result) { | |
1511 | case L2CAP_CR_SUCCESS: | |
1512 | sk->sk_state = BT_CONFIG; | |
1513 | l2cap_pi(sk)->ident = 0; | |
1514 | l2cap_pi(sk)->dcid = dcid; | |
1515 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
1516 | ||
1517 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1518 | l2cap_build_conf_req(sk, req), req); | |
1519 | break; | |
1520 | ||
1521 | case L2CAP_CR_PEND: | |
1522 | break; | |
1523 | ||
1524 | default: | |
1525 | l2cap_chan_del(sk, ECONNREFUSED); | |
1526 | break; | |
1527 | } | |
1528 | ||
1529 | bh_unlock_sock(sk); | |
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1534 | { | |
1535 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
1536 | u16 dcid, flags; | |
1537 | u8 rsp[64]; | |
1538 | struct sock *sk; | |
5dee9e7c | 1539 | int len; |
1da177e4 LT |
1540 | |
1541 | dcid = __le16_to_cpu(req->dcid); | |
1542 | flags = __le16_to_cpu(req->flags); | |
1543 | ||
1544 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
1545 | ||
1546 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
1547 | return -ENOENT; | |
1548 | ||
354f60a9 MH |
1549 | if (sk->sk_state == BT_DISCONN) |
1550 | goto unlock; | |
1551 | ||
5dee9e7c MH |
1552 | /* Reject if config buffer is too small. */ |
1553 | len = cmd->len - sizeof(*req); | |
1554 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { | |
1555 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
1556 | l2cap_build_conf_rsp(sk, rsp, | |
1557 | L2CAP_CONF_REJECT, flags), rsp); | |
1558 | goto unlock; | |
1559 | } | |
1560 | ||
1561 | /* Store config. */ | |
1562 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
1563 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
1564 | |
1565 | if (flags & 0x0001) { | |
1566 | /* Incomplete config. Send empty response. */ | |
1567 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
1568 | l2cap_build_conf_rsp(sk, rsp, |
1569 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
1570 | goto unlock; |
1571 | } | |
1572 | ||
1573 | /* Complete config. */ | |
5dee9e7c MH |
1574 | len = l2cap_parse_conf_req(sk, rsp); |
1575 | if (len < 0) | |
1da177e4 LT |
1576 | goto unlock; |
1577 | ||
5dee9e7c MH |
1578 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
1579 | ||
1580 | /* Output config done. */ | |
1da177e4 LT |
1581 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_OUTPUT_DONE; |
1582 | ||
5dee9e7c MH |
1583 | /* Reset config buffer. */ |
1584 | l2cap_pi(sk)->conf_len = 0; | |
1585 | ||
1da177e4 LT |
1586 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
1587 | sk->sk_state = BT_CONNECTED; | |
1588 | l2cap_chan_ready(sk); | |
1589 | } else if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
1590 | u8 req[64]; | |
1591 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1592 | l2cap_build_conf_req(sk, req), req); | |
1593 | } | |
1594 | ||
1595 | unlock: | |
1596 | bh_unlock_sock(sk); | |
1597 | return 0; | |
1598 | } | |
1599 | ||
1600 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1601 | { | |
1602 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
1603 | u16 scid, flags, result; | |
1604 | struct sock *sk; | |
1605 | ||
1606 | scid = __le16_to_cpu(rsp->scid); | |
1607 | flags = __le16_to_cpu(rsp->flags); | |
1608 | result = __le16_to_cpu(rsp->result); | |
1609 | ||
1610 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", scid, flags, result); | |
1611 | ||
1612 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1613 | return 0; | |
1614 | ||
1615 | switch (result) { | |
1616 | case L2CAP_CONF_SUCCESS: | |
1617 | break; | |
1618 | ||
1619 | case L2CAP_CONF_UNACCEPT: | |
1620 | if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) { | |
1621 | char req[128]; | |
1622 | /* It does not make sense to adjust L2CAP parameters | |
1623 | * that are currently defined in the spec. We simply | |
1624 | * resend config request that we sent earlier. It is | |
1625 | * stupid, but it helps qualification testing which | |
1626 | * expects at least some response from us. */ | |
1627 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1628 | l2cap_build_conf_req(sk, req), req); | |
1629 | goto done; | |
1630 | } | |
1631 | ||
8e87d142 | 1632 | default: |
1da177e4 LT |
1633 | sk->sk_state = BT_DISCONN; |
1634 | sk->sk_err = ECONNRESET; | |
1635 | l2cap_sock_set_timer(sk, HZ * 5); | |
1636 | { | |
1637 | struct l2cap_disconn_req req; | |
aca3192c YH |
1638 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
1639 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
1640 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
1641 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
1642 | } | |
1643 | goto done; | |
1644 | } | |
1645 | ||
1646 | if (flags & 0x01) | |
1647 | goto done; | |
1648 | ||
1649 | /* Input config done */ | |
1650 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; | |
1651 | ||
1652 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
1653 | sk->sk_state = BT_CONNECTED; | |
1654 | l2cap_chan_ready(sk); | |
1655 | } | |
1656 | ||
1657 | done: | |
1658 | bh_unlock_sock(sk); | |
1659 | return 0; | |
1660 | } | |
1661 | ||
1662 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1663 | { | |
1664 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
1665 | struct l2cap_disconn_rsp rsp; | |
1666 | u16 dcid, scid; | |
1667 | struct sock *sk; | |
1668 | ||
1669 | scid = __le16_to_cpu(req->scid); | |
1670 | dcid = __le16_to_cpu(req->dcid); | |
1671 | ||
1672 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
1673 | ||
1674 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
1675 | return 0; | |
1676 | ||
aca3192c YH |
1677 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
1678 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
1679 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
1680 | ||
1681 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1682 | ||
1683 | l2cap_chan_del(sk, ECONNRESET); | |
1684 | bh_unlock_sock(sk); | |
1685 | ||
1686 | l2cap_sock_kill(sk); | |
1687 | return 0; | |
1688 | } | |
1689 | ||
1690 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1691 | { | |
1692 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
1693 | u16 dcid, scid; | |
1694 | struct sock *sk; | |
1695 | ||
1696 | scid = __le16_to_cpu(rsp->scid); | |
1697 | dcid = __le16_to_cpu(rsp->dcid); | |
1698 | ||
1699 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
1700 | ||
1701 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1702 | return 0; | |
1703 | ||
1704 | l2cap_chan_del(sk, 0); | |
1705 | bh_unlock_sock(sk); | |
1706 | ||
1707 | l2cap_sock_kill(sk); | |
1708 | return 0; | |
1709 | } | |
1710 | ||
1711 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1712 | { | |
1713 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1714 | struct l2cap_info_rsp rsp; | |
1715 | u16 type; | |
1716 | ||
1717 | type = __le16_to_cpu(req->type); | |
1718 | ||
1719 | BT_DBG("type 0x%4.4x", type); | |
1720 | ||
aca3192c YH |
1721 | rsp.type = cpu_to_le16(type); |
1722 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
1da177e4 LT |
1723 | l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
1724 | ||
1725 | return 0; | |
1726 | } | |
1727 | ||
1728 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1729 | { | |
1730 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
1731 | u16 type, result; | |
1732 | ||
1733 | type = __le16_to_cpu(rsp->type); | |
1734 | result = __le16_to_cpu(rsp->result); | |
1735 | ||
1736 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
1737 | ||
1738 | return 0; | |
1739 | } | |
1740 | ||
1741 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
1742 | { | |
1743 | u8 *data = skb->data; | |
1744 | int len = skb->len; | |
1745 | struct l2cap_cmd_hdr cmd; | |
1746 | int err = 0; | |
1747 | ||
1748 | l2cap_raw_recv(conn, skb); | |
1749 | ||
1750 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
1751 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); | |
1752 | data += L2CAP_CMD_HDR_SIZE; | |
1753 | len -= L2CAP_CMD_HDR_SIZE; | |
1754 | ||
1755 | cmd.len = __le16_to_cpu(cmd.len); | |
1756 | ||
1757 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd.len, cmd.ident); | |
1758 | ||
1759 | if (cmd.len > len || !cmd.ident) { | |
1760 | BT_DBG("corrupted command"); | |
1761 | break; | |
1762 | } | |
1763 | ||
1764 | switch (cmd.code) { | |
1765 | case L2CAP_COMMAND_REJ: | |
1766 | /* FIXME: We should process this */ | |
1767 | break; | |
1768 | ||
1769 | case L2CAP_CONN_REQ: | |
1770 | err = l2cap_connect_req(conn, &cmd, data); | |
1771 | break; | |
1772 | ||
1773 | case L2CAP_CONN_RSP: | |
1774 | err = l2cap_connect_rsp(conn, &cmd, data); | |
1775 | break; | |
1776 | ||
1777 | case L2CAP_CONF_REQ: | |
1778 | err = l2cap_config_req(conn, &cmd, data); | |
1779 | break; | |
1780 | ||
1781 | case L2CAP_CONF_RSP: | |
1782 | err = l2cap_config_rsp(conn, &cmd, data); | |
1783 | break; | |
1784 | ||
1785 | case L2CAP_DISCONN_REQ: | |
1786 | err = l2cap_disconnect_req(conn, &cmd, data); | |
1787 | break; | |
1788 | ||
1789 | case L2CAP_DISCONN_RSP: | |
1790 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
1791 | break; | |
1792 | ||
1793 | case L2CAP_ECHO_REQ: | |
1794 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd.len, data); | |
1795 | break; | |
1796 | ||
1797 | case L2CAP_ECHO_RSP: | |
1798 | break; | |
1799 | ||
1800 | case L2CAP_INFO_REQ: | |
1801 | err = l2cap_information_req(conn, &cmd, data); | |
1802 | break; | |
1803 | ||
1804 | case L2CAP_INFO_RSP: | |
1805 | err = l2cap_information_rsp(conn, &cmd, data); | |
1806 | break; | |
1807 | ||
1808 | default: | |
1809 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
1810 | err = -EINVAL; | |
1811 | break; | |
1812 | } | |
1813 | ||
1814 | if (err) { | |
1815 | struct l2cap_cmd_rej rej; | |
1816 | BT_DBG("error %d", err); | |
1817 | ||
1818 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 1819 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
1820 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
1821 | } | |
1822 | ||
1823 | data += cmd.len; | |
1824 | len -= cmd.len; | |
1825 | } | |
1826 | ||
1827 | kfree_skb(skb); | |
1828 | } | |
1829 | ||
1830 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) | |
1831 | { | |
1832 | struct sock *sk; | |
1833 | ||
1834 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
1835 | if (!sk) { | |
1836 | BT_DBG("unknown cid 0x%4.4x", cid); | |
1837 | goto drop; | |
1838 | } | |
1839 | ||
1840 | BT_DBG("sk %p, len %d", sk, skb->len); | |
1841 | ||
1842 | if (sk->sk_state != BT_CONNECTED) | |
1843 | goto drop; | |
1844 | ||
1845 | if (l2cap_pi(sk)->imtu < skb->len) | |
1846 | goto drop; | |
1847 | ||
1848 | /* If socket recv buffers overflows we drop data here | |
1849 | * which is *bad* because L2CAP has to be reliable. | |
1850 | * But we don't have any other choice. L2CAP doesn't | |
1851 | * provide flow control mechanism. */ | |
1852 | ||
1853 | if (!sock_queue_rcv_skb(sk, skb)) | |
1854 | goto done; | |
1855 | ||
1856 | drop: | |
1857 | kfree_skb(skb); | |
1858 | ||
1859 | done: | |
0139418c MH |
1860 | if (sk) |
1861 | bh_unlock_sock(sk); | |
1862 | ||
1da177e4 LT |
1863 | return 0; |
1864 | } | |
1865 | ||
8e036fc3 | 1866 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
1867 | { |
1868 | struct sock *sk; | |
1869 | ||
1870 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
1871 | if (!sk) | |
1872 | goto drop; | |
1873 | ||
1874 | BT_DBG("sk %p, len %d", sk, skb->len); | |
1875 | ||
1876 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
1877 | goto drop; | |
1878 | ||
1879 | if (l2cap_pi(sk)->imtu < skb->len) | |
1880 | goto drop; | |
1881 | ||
1882 | if (!sock_queue_rcv_skb(sk, skb)) | |
1883 | goto done; | |
1884 | ||
1885 | drop: | |
1886 | kfree_skb(skb); | |
1887 | ||
1888 | done: | |
1889 | if (sk) bh_unlock_sock(sk); | |
1890 | return 0; | |
1891 | } | |
1892 | ||
1893 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
1894 | { | |
1895 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
1896 | u16 cid, len; |
1897 | __le16 psm; | |
1da177e4 LT |
1898 | |
1899 | skb_pull(skb, L2CAP_HDR_SIZE); | |
1900 | cid = __le16_to_cpu(lh->cid); | |
1901 | len = __le16_to_cpu(lh->len); | |
1902 | ||
1903 | BT_DBG("len %d, cid 0x%4.4x", len, cid); | |
1904 | ||
1905 | switch (cid) { | |
1906 | case 0x0001: | |
1907 | l2cap_sig_channel(conn, skb); | |
1908 | break; | |
1909 | ||
1910 | case 0x0002: | |
8e036fc3 | 1911 | psm = get_unaligned((__le16 *) skb->data); |
1da177e4 LT |
1912 | skb_pull(skb, 2); |
1913 | l2cap_conless_channel(conn, psm, skb); | |
1914 | break; | |
1915 | ||
1916 | default: | |
1917 | l2cap_data_channel(conn, cid, skb); | |
1918 | break; | |
1919 | } | |
1920 | } | |
1921 | ||
1922 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
1923 | ||
1924 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
1925 | { | |
1926 | int exact = 0, lm1 = 0, lm2 = 0; | |
1927 | register struct sock *sk; | |
1928 | struct hlist_node *node; | |
1929 | ||
1930 | if (type != ACL_LINK) | |
1931 | return 0; | |
1932 | ||
1933 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
1934 | ||
1935 | /* Find listening sockets and check their link_mode */ | |
1936 | read_lock(&l2cap_sk_list.lock); | |
1937 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
1938 | if (sk->sk_state != BT_LISTEN) | |
1939 | continue; | |
1940 | ||
1941 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
1942 | lm1 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode); | |
1943 | exact++; | |
1944 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
1945 | lm2 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode); | |
1946 | } | |
1947 | read_unlock(&l2cap_sk_list.lock); | |
1948 | ||
1949 | return exact ? lm1 : lm2; | |
1950 | } | |
1951 | ||
1952 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
1953 | { | |
0139418c MH |
1954 | struct l2cap_conn *conn; |
1955 | ||
1da177e4 LT |
1956 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
1957 | ||
1958 | if (hcon->type != ACL_LINK) | |
1959 | return 0; | |
1960 | ||
1961 | if (!status) { | |
1da177e4 LT |
1962 | conn = l2cap_conn_add(hcon, status); |
1963 | if (conn) | |
1964 | l2cap_conn_ready(conn); | |
0139418c | 1965 | } else |
1da177e4 LT |
1966 | l2cap_conn_del(hcon, bt_err(status)); |
1967 | ||
1968 | return 0; | |
1969 | } | |
1970 | ||
1971 | static int l2cap_disconn_ind(struct hci_conn *hcon, u8 reason) | |
1972 | { | |
1973 | BT_DBG("hcon %p reason %d", hcon, reason); | |
1974 | ||
1975 | if (hcon->type != ACL_LINK) | |
1976 | return 0; | |
1977 | ||
1978 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 1979 | |
1da177e4 LT |
1980 | return 0; |
1981 | } | |
1982 | ||
1983 | static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status) | |
1984 | { | |
1985 | struct l2cap_chan_list *l; | |
0139418c | 1986 | struct l2cap_conn *conn = conn = hcon->l2cap_data; |
1da177e4 LT |
1987 | struct l2cap_conn_rsp rsp; |
1988 | struct sock *sk; | |
1989 | int result; | |
1990 | ||
0139418c | 1991 | if (!conn) |
1da177e4 | 1992 | return 0; |
0139418c | 1993 | |
1da177e4 LT |
1994 | l = &conn->chan_list; |
1995 | ||
1996 | BT_DBG("conn %p", conn); | |
1997 | ||
1998 | read_lock(&l->lock); | |
1999 | ||
2000 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2001 | bh_lock_sock(sk); | |
2002 | ||
2003 | if (sk->sk_state != BT_CONNECT2 || | |
2004 | (l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) || | |
2005 | (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) { | |
2006 | bh_unlock_sock(sk); | |
2007 | continue; | |
2008 | } | |
2009 | ||
2010 | if (!status) { | |
2011 | sk->sk_state = BT_CONFIG; | |
2012 | result = 0; | |
2013 | } else { | |
2014 | sk->sk_state = BT_DISCONN; | |
2015 | l2cap_sock_set_timer(sk, HZ/10); | |
2016 | result = L2CAP_CR_SEC_BLOCK; | |
2017 | } | |
2018 | ||
aca3192c YH |
2019 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
2020 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2021 | rsp.result = cpu_to_le16(result); | |
2022 | rsp.status = cpu_to_le16(0); | |
1da177e4 LT |
2023 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2024 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
2025 | ||
2026 | bh_unlock_sock(sk); | |
2027 | } | |
2028 | ||
2029 | read_unlock(&l->lock); | |
2030 | return 0; | |
2031 | } | |
2032 | ||
2033 | static int l2cap_encrypt_cfm(struct hci_conn *hcon, u8 status) | |
2034 | { | |
2035 | struct l2cap_chan_list *l; | |
0139418c | 2036 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
2037 | struct l2cap_conn_rsp rsp; |
2038 | struct sock *sk; | |
2039 | int result; | |
2040 | ||
0139418c | 2041 | if (!conn) |
1da177e4 | 2042 | return 0; |
0139418c | 2043 | |
1da177e4 LT |
2044 | l = &conn->chan_list; |
2045 | ||
2046 | BT_DBG("conn %p", conn); | |
2047 | ||
2048 | read_lock(&l->lock); | |
2049 | ||
2050 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2051 | bh_lock_sock(sk); | |
2052 | ||
2053 | if (sk->sk_state != BT_CONNECT2) { | |
2054 | bh_unlock_sock(sk); | |
2055 | continue; | |
2056 | } | |
2057 | ||
2058 | if (!status) { | |
2059 | sk->sk_state = BT_CONFIG; | |
2060 | result = 0; | |
2061 | } else { | |
2062 | sk->sk_state = BT_DISCONN; | |
2063 | l2cap_sock_set_timer(sk, HZ/10); | |
2064 | result = L2CAP_CR_SEC_BLOCK; | |
2065 | } | |
2066 | ||
aca3192c YH |
2067 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
2068 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2069 | rsp.result = cpu_to_le16(result); | |
2070 | rsp.status = cpu_to_le16(0); | |
1da177e4 LT |
2071 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2072 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
2073 | ||
2074 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE) | |
2075 | hci_conn_change_link_key(hcon); | |
2076 | ||
2077 | bh_unlock_sock(sk); | |
2078 | } | |
2079 | ||
2080 | read_unlock(&l->lock); | |
2081 | return 0; | |
2082 | } | |
2083 | ||
2084 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
2085 | { | |
2086 | struct l2cap_conn *conn = hcon->l2cap_data; | |
2087 | ||
2088 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
2089 | goto drop; | |
2090 | ||
2091 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
2092 | ||
2093 | if (flags & ACL_START) { | |
2094 | struct l2cap_hdr *hdr; | |
2095 | int len; | |
2096 | ||
2097 | if (conn->rx_len) { | |
2098 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
2099 | kfree_skb(conn->rx_skb); | |
2100 | conn->rx_skb = NULL; | |
2101 | conn->rx_len = 0; | |
2102 | l2cap_conn_unreliable(conn, ECOMM); | |
2103 | } | |
2104 | ||
2105 | if (skb->len < 2) { | |
2106 | BT_ERR("Frame is too short (len %d)", skb->len); | |
2107 | l2cap_conn_unreliable(conn, ECOMM); | |
2108 | goto drop; | |
2109 | } | |
2110 | ||
2111 | hdr = (struct l2cap_hdr *) skb->data; | |
2112 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
2113 | ||
2114 | if (len == skb->len) { | |
2115 | /* Complete frame received */ | |
2116 | l2cap_recv_frame(conn, skb); | |
2117 | return 0; | |
2118 | } | |
2119 | ||
2120 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
2121 | ||
2122 | if (skb->len > len) { | |
2123 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
2124 | skb->len, len); | |
2125 | l2cap_conn_unreliable(conn, ECOMM); | |
2126 | goto drop; | |
2127 | } | |
2128 | ||
2129 | /* Allocate skb for the complete frame (with header) */ | |
2130 | if (!(conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC))) | |
2131 | goto drop; | |
2132 | ||
d626f62b ACM |
2133 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
2134 | skb->len); | |
1da177e4 LT |
2135 | conn->rx_len = len - skb->len; |
2136 | } else { | |
2137 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
2138 | ||
2139 | if (!conn->rx_len) { | |
2140 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
2141 | l2cap_conn_unreliable(conn, ECOMM); | |
2142 | goto drop; | |
2143 | } | |
2144 | ||
2145 | if (skb->len > conn->rx_len) { | |
2146 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
2147 | skb->len, conn->rx_len); | |
2148 | kfree_skb(conn->rx_skb); | |
2149 | conn->rx_skb = NULL; | |
2150 | conn->rx_len = 0; | |
2151 | l2cap_conn_unreliable(conn, ECOMM); | |
2152 | goto drop; | |
2153 | } | |
2154 | ||
d626f62b ACM |
2155 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
2156 | skb->len); | |
1da177e4 LT |
2157 | conn->rx_len -= skb->len; |
2158 | ||
2159 | if (!conn->rx_len) { | |
2160 | /* Complete frame received */ | |
2161 | l2cap_recv_frame(conn, conn->rx_skb); | |
2162 | conn->rx_skb = NULL; | |
2163 | } | |
2164 | } | |
2165 | ||
2166 | drop: | |
2167 | kfree_skb(skb); | |
2168 | return 0; | |
2169 | } | |
2170 | ||
be9d1227 | 2171 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
2172 | { |
2173 | struct sock *sk; | |
2174 | struct hlist_node *node; | |
be9d1227 | 2175 | char *str = buf; |
1da177e4 LT |
2176 | |
2177 | read_lock_bh(&l2cap_sk_list.lock); | |
2178 | ||
be9d1227 MH |
2179 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
2180 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1da177e4 | 2181 | |
be9d1227 MH |
2182 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d 0x%x\n", |
2183 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), | |
73863976 MH |
2184 | sk->sk_state, btohs(pi->psm), pi->scid, pi->dcid, |
2185 | pi->imtu, pi->omtu, pi->link_mode); | |
be9d1227 | 2186 | } |
1da177e4 | 2187 | |
1da177e4 | 2188 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 2189 | |
be9d1227 | 2190 | return (str - buf); |
1da177e4 LT |
2191 | } |
2192 | ||
be9d1227 | 2193 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
1da177e4 | 2194 | |
90ddc4f0 | 2195 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
2196 | .family = PF_BLUETOOTH, |
2197 | .owner = THIS_MODULE, | |
2198 | .release = l2cap_sock_release, | |
2199 | .bind = l2cap_sock_bind, | |
2200 | .connect = l2cap_sock_connect, | |
2201 | .listen = l2cap_sock_listen, | |
2202 | .accept = l2cap_sock_accept, | |
2203 | .getname = l2cap_sock_getname, | |
2204 | .sendmsg = l2cap_sock_sendmsg, | |
2205 | .recvmsg = bt_sock_recvmsg, | |
2206 | .poll = bt_sock_poll, | |
2207 | .mmap = sock_no_mmap, | |
2208 | .socketpair = sock_no_socketpair, | |
2209 | .ioctl = sock_no_ioctl, | |
2210 | .shutdown = l2cap_sock_shutdown, | |
2211 | .setsockopt = l2cap_sock_setsockopt, | |
2212 | .getsockopt = l2cap_sock_getsockopt | |
2213 | }; | |
2214 | ||
2215 | static struct net_proto_family l2cap_sock_family_ops = { | |
2216 | .family = PF_BLUETOOTH, | |
2217 | .owner = THIS_MODULE, | |
2218 | .create = l2cap_sock_create, | |
2219 | }; | |
2220 | ||
2221 | static struct hci_proto l2cap_hci_proto = { | |
2222 | .name = "L2CAP", | |
2223 | .id = HCI_PROTO_L2CAP, | |
2224 | .connect_ind = l2cap_connect_ind, | |
2225 | .connect_cfm = l2cap_connect_cfm, | |
2226 | .disconn_ind = l2cap_disconn_ind, | |
2227 | .auth_cfm = l2cap_auth_cfm, | |
2228 | .encrypt_cfm = l2cap_encrypt_cfm, | |
2229 | .recv_acldata = l2cap_recv_acldata | |
2230 | }; | |
2231 | ||
2232 | static int __init l2cap_init(void) | |
2233 | { | |
2234 | int err; | |
be9d1227 | 2235 | |
1da177e4 LT |
2236 | err = proto_register(&l2cap_proto, 0); |
2237 | if (err < 0) | |
2238 | return err; | |
2239 | ||
2240 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
2241 | if (err < 0) { | |
2242 | BT_ERR("L2CAP socket registration failed"); | |
2243 | goto error; | |
2244 | } | |
2245 | ||
2246 | err = hci_register_proto(&l2cap_hci_proto); | |
2247 | if (err < 0) { | |
2248 | BT_ERR("L2CAP protocol registration failed"); | |
2249 | bt_sock_unregister(BTPROTO_L2CAP); | |
2250 | goto error; | |
2251 | } | |
2252 | ||
df5c37ea MH |
2253 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
2254 | BT_ERR("Failed to create L2CAP info file"); | |
1da177e4 LT |
2255 | |
2256 | BT_INFO("L2CAP ver %s", VERSION); | |
2257 | BT_INFO("L2CAP socket layer initialized"); | |
2258 | ||
2259 | return 0; | |
2260 | ||
2261 | error: | |
2262 | proto_unregister(&l2cap_proto); | |
2263 | return err; | |
2264 | } | |
2265 | ||
2266 | static void __exit l2cap_exit(void) | |
2267 | { | |
a91f2e39 | 2268 | class_remove_file(bt_class, &class_attr_l2cap); |
1da177e4 LT |
2269 | |
2270 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
2271 | BT_ERR("L2CAP socket unregistration failed"); | |
2272 | ||
2273 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
2274 | BT_ERR("L2CAP protocol unregistration failed"); | |
2275 | ||
2276 | proto_unregister(&l2cap_proto); | |
2277 | } | |
2278 | ||
2279 | void l2cap_load(void) | |
2280 | { | |
2281 | /* Dummy function to trigger automatic L2CAP module loading by | |
2282 | * other modules that use L2CAP sockets but don't use any other | |
2283 | * symbols from it. */ | |
2284 | return; | |
2285 | } | |
2286 | EXPORT_SYMBOL(l2cap_load); | |
2287 | ||
2288 | module_init(l2cap_init); | |
2289 | module_exit(l2cap_exit); | |
2290 | ||
2291 | MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>"); | |
2292 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); | |
2293 | MODULE_VERSION(VERSION); | |
2294 | MODULE_LICENSE("GPL"); | |
2295 | MODULE_ALIAS("bt-proto-0"); |