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 | ||
f0709e03 MH |
58 | #define VERSION "2.9" |
59 | ||
60 | static u32 l2cap_feat_mask = 0x0000; | |
1da177e4 | 61 | |
90ddc4f0 | 62 | static const struct proto_ops l2cap_sock_ops; |
1da177e4 LT |
63 | |
64 | static struct bt_sock_list l2cap_sk_list = { | |
65 | .lock = RW_LOCK_UNLOCKED | |
66 | }; | |
67 | ||
1da177e4 LT |
68 | static void __l2cap_sock_close(struct sock *sk, int reason); |
69 | static void l2cap_sock_close(struct sock *sk); | |
70 | static void l2cap_sock_kill(struct sock *sk); | |
71 | ||
72 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
73 | u8 code, u8 ident, u16 dlen, void *data); | |
74 | ||
75 | /* ---- L2CAP timers ---- */ | |
76 | static void l2cap_sock_timeout(unsigned long arg) | |
77 | { | |
78 | struct sock *sk = (struct sock *) arg; | |
79 | ||
80 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
81 | ||
82 | bh_lock_sock(sk); | |
83 | __l2cap_sock_close(sk, ETIMEDOUT); | |
84 | bh_unlock_sock(sk); | |
85 | ||
86 | l2cap_sock_kill(sk); | |
87 | sock_put(sk); | |
88 | } | |
89 | ||
90 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
91 | { | |
92 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
93 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
94 | } | |
95 | ||
96 | static void l2cap_sock_clear_timer(struct sock *sk) | |
97 | { | |
98 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
99 | sk_stop_timer(sk, &sk->sk_timer); | |
100 | } | |
101 | ||
102 | static void l2cap_sock_init_timer(struct sock *sk) | |
103 | { | |
104 | init_timer(&sk->sk_timer); | |
105 | sk->sk_timer.function = l2cap_sock_timeout; | |
106 | sk->sk_timer.data = (unsigned long)sk; | |
107 | } | |
108 | ||
0139418c MH |
109 | /* ---- L2CAP channels ---- */ |
110 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
111 | { | |
112 | struct sock *s; | |
113 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
114 | if (l2cap_pi(s)->dcid == cid) | |
115 | break; | |
116 | } | |
117 | return s; | |
118 | } | |
119 | ||
120 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
121 | { | |
122 | struct sock *s; | |
123 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
124 | if (l2cap_pi(s)->scid == cid) | |
125 | break; | |
126 | } | |
127 | return s; | |
128 | } | |
129 | ||
130 | /* Find channel with given SCID. | |
131 | * Returns locked socket */ | |
132 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
133 | { | |
134 | struct sock *s; | |
135 | read_lock(&l->lock); | |
136 | s = __l2cap_get_chan_by_scid(l, cid); | |
137 | if (s) bh_lock_sock(s); | |
138 | read_unlock(&l->lock); | |
139 | return s; | |
140 | } | |
141 | ||
142 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
143 | { | |
144 | struct sock *s; | |
145 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
146 | if (l2cap_pi(s)->ident == ident) | |
147 | break; | |
148 | } | |
149 | return s; | |
150 | } | |
151 | ||
152 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
153 | { | |
154 | struct sock *s; | |
155 | read_lock(&l->lock); | |
156 | s = __l2cap_get_chan_by_ident(l, ident); | |
157 | if (s) bh_lock_sock(s); | |
158 | read_unlock(&l->lock); | |
159 | return s; | |
160 | } | |
161 | ||
162 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
163 | { | |
164 | u16 cid = 0x0040; | |
165 | ||
166 | for (; cid < 0xffff; cid++) { | |
167 | if(!__l2cap_get_chan_by_scid(l, cid)) | |
168 | return cid; | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
175 | { | |
176 | sock_hold(sk); | |
177 | ||
178 | if (l->head) | |
179 | l2cap_pi(l->head)->prev_c = sk; | |
180 | ||
181 | l2cap_pi(sk)->next_c = l->head; | |
182 | l2cap_pi(sk)->prev_c = NULL; | |
183 | l->head = sk; | |
184 | } | |
185 | ||
186 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
187 | { | |
188 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
189 | ||
fd1278d7 | 190 | write_lock_bh(&l->lock); |
0139418c MH |
191 | if (sk == l->head) |
192 | l->head = next; | |
193 | ||
194 | if (next) | |
195 | l2cap_pi(next)->prev_c = prev; | |
196 | if (prev) | |
197 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 198 | write_unlock_bh(&l->lock); |
0139418c MH |
199 | |
200 | __sock_put(sk); | |
201 | } | |
202 | ||
203 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
204 | { | |
205 | struct l2cap_chan_list *l = &conn->chan_list; | |
206 | ||
207 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
208 | ||
209 | l2cap_pi(sk)->conn = conn; | |
210 | ||
211 | if (sk->sk_type == SOCK_SEQPACKET) { | |
212 | /* Alloc CID for connection-oriented socket */ | |
213 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
214 | } else if (sk->sk_type == SOCK_DGRAM) { | |
215 | /* Connectionless socket */ | |
216 | l2cap_pi(sk)->scid = 0x0002; | |
217 | l2cap_pi(sk)->dcid = 0x0002; | |
218 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
219 | } else { | |
220 | /* Raw socket can send/recv signalling messages only */ | |
221 | l2cap_pi(sk)->scid = 0x0001; | |
222 | l2cap_pi(sk)->dcid = 0x0001; | |
223 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
224 | } | |
225 | ||
226 | __l2cap_chan_link(l, sk); | |
227 | ||
228 | if (parent) | |
229 | bt_accept_enqueue(parent, sk); | |
230 | } | |
231 | ||
8e87d142 | 232 | /* Delete channel. |
0139418c MH |
233 | * Must be called on the locked socket. */ |
234 | static void l2cap_chan_del(struct sock *sk, int err) | |
235 | { | |
236 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
237 | struct sock *parent = bt_sk(sk)->parent; | |
238 | ||
239 | l2cap_sock_clear_timer(sk); | |
240 | ||
241 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
242 | ||
8e87d142 | 243 | if (conn) { |
0139418c MH |
244 | /* Unlink from channel list */ |
245 | l2cap_chan_unlink(&conn->chan_list, sk); | |
246 | l2cap_pi(sk)->conn = NULL; | |
247 | hci_conn_put(conn->hcon); | |
248 | } | |
249 | ||
250 | sk->sk_state = BT_CLOSED; | |
251 | sock_set_flag(sk, SOCK_ZAPPED); | |
252 | ||
253 | if (err) | |
254 | sk->sk_err = err; | |
255 | ||
256 | if (parent) { | |
257 | bt_accept_unlink(sk); | |
258 | parent->sk_data_ready(parent, 0); | |
259 | } else | |
260 | sk->sk_state_change(sk); | |
261 | } | |
262 | ||
4e8402a3 MH |
263 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
264 | { | |
265 | u8 id; | |
266 | ||
267 | /* Get next available identificator. | |
268 | * 1 - 128 are used by kernel. | |
269 | * 129 - 199 are reserved. | |
270 | * 200 - 254 are used by utilities like l2ping, etc. | |
271 | */ | |
272 | ||
273 | spin_lock_bh(&conn->lock); | |
274 | ||
275 | if (++conn->tx_ident > 128) | |
276 | conn->tx_ident = 1; | |
277 | ||
278 | id = conn->tx_ident; | |
279 | ||
280 | spin_unlock_bh(&conn->lock); | |
281 | ||
282 | return id; | |
283 | } | |
284 | ||
285 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) | |
286 | { | |
287 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
288 | ||
289 | BT_DBG("code 0x%2.2x", code); | |
290 | ||
291 | if (!skb) | |
292 | return -ENOMEM; | |
293 | ||
294 | return hci_send_acl(conn->hcon, skb, 0); | |
295 | } | |
296 | ||
1da177e4 | 297 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
298 | static void l2cap_conn_start(struct l2cap_conn *conn) |
299 | { | |
300 | struct l2cap_chan_list *l = &conn->chan_list; | |
301 | struct sock *sk; | |
302 | ||
303 | BT_DBG("conn %p", conn); | |
304 | ||
305 | read_lock(&l->lock); | |
306 | ||
307 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
308 | bh_lock_sock(sk); | |
309 | ||
310 | if (sk->sk_type != SOCK_SEQPACKET) { | |
311 | l2cap_sock_clear_timer(sk); | |
312 | sk->sk_state = BT_CONNECTED; | |
313 | sk->sk_state_change(sk); | |
314 | } else if (sk->sk_state == BT_CONNECT) { | |
315 | struct l2cap_conn_req req; | |
316 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); | |
317 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
318 | req.psm = l2cap_pi(sk)->psm; | |
319 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
320 | L2CAP_CONN_REQ, sizeof(req), &req); | |
321 | } | |
322 | ||
323 | bh_unlock_sock(sk); | |
324 | } | |
325 | ||
326 | read_unlock(&l->lock); | |
327 | } | |
328 | ||
329 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
330 | { | |
331 | BT_DBG("conn %p", conn); | |
332 | ||
333 | if (conn->chan_list.head || !hlist_empty(&l2cap_sk_list.head)) { | |
334 | struct l2cap_info_req req; | |
335 | ||
336 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
337 | ||
338 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
339 | conn->info_ident = l2cap_get_ident(conn); | |
340 | ||
341 | mod_timer(&conn->info_timer, | |
342 | jiffies + msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
343 | ||
344 | l2cap_send_cmd(conn, conn->info_ident, | |
345 | L2CAP_INFO_REQ, sizeof(req), &req); | |
346 | } | |
347 | } | |
348 | ||
349 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
350 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
351 | { | |
352 | struct l2cap_chan_list *l = &conn->chan_list; | |
353 | struct sock *sk; | |
354 | ||
355 | BT_DBG("conn %p", conn); | |
356 | ||
357 | read_lock(&l->lock); | |
358 | ||
359 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
360 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_RELIABLE) | |
361 | sk->sk_err = err; | |
362 | } | |
363 | ||
364 | read_unlock(&l->lock); | |
365 | } | |
366 | ||
367 | static void l2cap_info_timeout(unsigned long arg) | |
368 | { | |
369 | struct l2cap_conn *conn = (void *) arg; | |
370 | ||
371 | conn->info_ident = 0; | |
372 | ||
373 | l2cap_conn_start(conn); | |
374 | } | |
375 | ||
1da177e4 LT |
376 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
377 | { | |
0139418c | 378 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 379 | |
0139418c | 380 | if (conn || status) |
1da177e4 LT |
381 | return conn; |
382 | ||
0139418c MH |
383 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
384 | if (!conn) | |
1da177e4 | 385 | return NULL; |
1da177e4 LT |
386 | |
387 | hcon->l2cap_data = conn; | |
388 | conn->hcon = hcon; | |
389 | ||
0139418c MH |
390 | BT_DBG("hcon %p conn %p", hcon, conn); |
391 | ||
1da177e4 LT |
392 | conn->mtu = hcon->hdev->acl_mtu; |
393 | conn->src = &hcon->hdev->bdaddr; | |
394 | conn->dst = &hcon->dst; | |
395 | ||
4e8402a3 MH |
396 | conn->feat_mask = 0; |
397 | ||
398 | init_timer(&conn->info_timer); | |
399 | conn->info_timer.function = l2cap_info_timeout; | |
400 | conn->info_timer.data = (unsigned long) conn; | |
401 | ||
1da177e4 LT |
402 | spin_lock_init(&conn->lock); |
403 | rwlock_init(&conn->chan_list.lock); | |
404 | ||
1da177e4 LT |
405 | return conn; |
406 | } | |
407 | ||
0139418c | 408 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 409 | { |
0139418c | 410 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
411 | struct sock *sk; |
412 | ||
0139418c MH |
413 | if (!conn) |
414 | return; | |
1da177e4 LT |
415 | |
416 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
417 | ||
418 | if (conn->rx_skb) | |
419 | kfree_skb(conn->rx_skb); | |
420 | ||
421 | /* Kill channels */ | |
422 | while ((sk = conn->chan_list.head)) { | |
423 | bh_lock_sock(sk); | |
424 | l2cap_chan_del(sk, err); | |
425 | bh_unlock_sock(sk); | |
426 | l2cap_sock_kill(sk); | |
427 | } | |
428 | ||
429 | hcon->l2cap_data = NULL; | |
430 | kfree(conn); | |
1da177e4 LT |
431 | } |
432 | ||
433 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
434 | { | |
435 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 436 | write_lock_bh(&l->lock); |
1da177e4 | 437 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 438 | write_unlock_bh(&l->lock); |
1da177e4 LT |
439 | } |
440 | ||
1da177e4 | 441 | /* ---- Socket interface ---- */ |
8e036fc3 | 442 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
443 | { |
444 | struct sock *sk; | |
445 | struct hlist_node *node; | |
446 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
447 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
448 | goto found; | |
449 | sk = NULL; | |
450 | found: | |
451 | return sk; | |
452 | } | |
453 | ||
454 | /* Find socket with psm and source bdaddr. | |
455 | * Returns closest match. | |
456 | */ | |
8e036fc3 | 457 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
458 | { |
459 | struct sock *sk = NULL, *sk1 = NULL; | |
460 | struct hlist_node *node; | |
461 | ||
462 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
463 | if (state && sk->sk_state != state) | |
464 | continue; | |
465 | ||
466 | if (l2cap_pi(sk)->psm == psm) { | |
467 | /* Exact match. */ | |
468 | if (!bacmp(&bt_sk(sk)->src, src)) | |
469 | break; | |
470 | ||
471 | /* Closest match */ | |
472 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
473 | sk1 = sk; | |
474 | } | |
475 | } | |
476 | return node ? sk : sk1; | |
477 | } | |
478 | ||
479 | /* Find socket with given address (psm, src). | |
480 | * Returns locked socket */ | |
8e036fc3 | 481 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
482 | { |
483 | struct sock *s; | |
484 | read_lock(&l2cap_sk_list.lock); | |
485 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
486 | if (s) bh_lock_sock(s); | |
487 | read_unlock(&l2cap_sk_list.lock); | |
488 | return s; | |
489 | } | |
490 | ||
491 | static void l2cap_sock_destruct(struct sock *sk) | |
492 | { | |
493 | BT_DBG("sk %p", sk); | |
494 | ||
495 | skb_queue_purge(&sk->sk_receive_queue); | |
496 | skb_queue_purge(&sk->sk_write_queue); | |
497 | } | |
498 | ||
499 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
500 | { | |
501 | struct sock *sk; | |
502 | ||
503 | BT_DBG("parent %p", parent); | |
504 | ||
505 | /* Close not yet accepted channels */ | |
506 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
507 | l2cap_sock_close(sk); | |
508 | ||
509 | parent->sk_state = BT_CLOSED; | |
510 | sock_set_flag(parent, SOCK_ZAPPED); | |
511 | } | |
512 | ||
513 | /* Kill socket (only if zapped and orphan) | |
514 | * Must be called on unlocked socket. | |
515 | */ | |
516 | static void l2cap_sock_kill(struct sock *sk) | |
517 | { | |
518 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
519 | return; | |
520 | ||
521 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
522 | ||
523 | /* Kill poor orphan */ | |
524 | bt_sock_unlink(&l2cap_sk_list, sk); | |
525 | sock_set_flag(sk, SOCK_DEAD); | |
526 | sock_put(sk); | |
527 | } | |
528 | ||
529 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
530 | { | |
531 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
532 | ||
533 | switch (sk->sk_state) { | |
534 | case BT_LISTEN: | |
535 | l2cap_sock_cleanup_listen(sk); | |
536 | break; | |
537 | ||
538 | case BT_CONNECTED: | |
539 | case BT_CONFIG: | |
540 | case BT_CONNECT2: | |
541 | if (sk->sk_type == SOCK_SEQPACKET) { | |
542 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
543 | struct l2cap_disconn_req req; | |
544 | ||
545 | sk->sk_state = BT_DISCONN; | |
546 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
547 | ||
aca3192c YH |
548 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
549 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
550 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
551 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
552 | } else { | |
553 | l2cap_chan_del(sk, reason); | |
554 | } | |
555 | break; | |
556 | ||
557 | case BT_CONNECT: | |
558 | case BT_DISCONN: | |
559 | l2cap_chan_del(sk, reason); | |
560 | break; | |
561 | ||
562 | default: | |
563 | sock_set_flag(sk, SOCK_ZAPPED); | |
564 | break; | |
565 | } | |
566 | } | |
567 | ||
568 | /* Must be called on unlocked socket. */ | |
569 | static void l2cap_sock_close(struct sock *sk) | |
570 | { | |
571 | l2cap_sock_clear_timer(sk); | |
572 | lock_sock(sk); | |
573 | __l2cap_sock_close(sk, ECONNRESET); | |
574 | release_sock(sk); | |
575 | l2cap_sock_kill(sk); | |
576 | } | |
577 | ||
578 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
579 | { | |
580 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
581 | ||
582 | BT_DBG("sk %p", sk); | |
583 | ||
584 | if (parent) { | |
585 | sk->sk_type = parent->sk_type; | |
586 | pi->imtu = l2cap_pi(parent)->imtu; | |
587 | pi->omtu = l2cap_pi(parent)->omtu; | |
588 | pi->link_mode = l2cap_pi(parent)->link_mode; | |
589 | } else { | |
590 | pi->imtu = L2CAP_DEFAULT_MTU; | |
591 | pi->omtu = 0; | |
592 | pi->link_mode = 0; | |
593 | } | |
594 | ||
595 | /* Default config options */ | |
5dee9e7c | 596 | pi->conf_len = 0; |
1da177e4 LT |
597 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
598 | } | |
599 | ||
600 | static struct proto l2cap_proto = { | |
601 | .name = "L2CAP", | |
602 | .owner = THIS_MODULE, | |
603 | .obj_size = sizeof(struct l2cap_pinfo) | |
604 | }; | |
605 | ||
1b8d7ae4 | 606 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
607 | { |
608 | struct sock *sk; | |
609 | ||
1b8d7ae4 | 610 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto, 1); |
1da177e4 LT |
611 | if (!sk) |
612 | return NULL; | |
613 | ||
614 | sock_init_data(sock, sk); | |
615 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
616 | ||
617 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 618 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
619 | |
620 | sock_reset_flag(sk, SOCK_ZAPPED); | |
621 | ||
622 | sk->sk_protocol = proto; | |
623 | sk->sk_state = BT_OPEN; | |
624 | ||
625 | l2cap_sock_init_timer(sk); | |
626 | ||
627 | bt_sock_link(&l2cap_sk_list, sk); | |
628 | return sk; | |
629 | } | |
630 | ||
1b8d7ae4 | 631 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
632 | { |
633 | struct sock *sk; | |
634 | ||
635 | BT_DBG("sock %p", sock); | |
636 | ||
637 | sock->state = SS_UNCONNECTED; | |
638 | ||
639 | if (sock->type != SOCK_SEQPACKET && | |
640 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
641 | return -ESOCKTNOSUPPORT; | |
642 | ||
643 | if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW)) | |
644 | return -EPERM; | |
645 | ||
646 | sock->ops = &l2cap_sock_ops; | |
647 | ||
1b8d7ae4 | 648 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
649 | if (!sk) |
650 | return -ENOMEM; | |
651 | ||
652 | l2cap_sock_init(sk, NULL); | |
653 | return 0; | |
654 | } | |
655 | ||
656 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
657 | { | |
658 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
659 | struct sock *sk = sock->sk; | |
660 | int err = 0; | |
661 | ||
662 | BT_DBG("sk %p, %s %d", sk, batostr(&la->l2_bdaddr), la->l2_psm); | |
663 | ||
664 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
665 | return -EINVAL; | |
666 | ||
667 | lock_sock(sk); | |
668 | ||
669 | if (sk->sk_state != BT_OPEN) { | |
670 | err = -EBADFD; | |
671 | goto done; | |
672 | } | |
673 | ||
8e036fc3 | 674 | if (la->l2_psm && btohs(la->l2_psm) < 0x1001 && |
847641d7 MH |
675 | !capable(CAP_NET_BIND_SERVICE)) { |
676 | err = -EACCES; | |
677 | goto done; | |
678 | } | |
8e87d142 | 679 | |
1da177e4 LT |
680 | write_lock_bh(&l2cap_sk_list.lock); |
681 | ||
682 | if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) { | |
683 | err = -EADDRINUSE; | |
684 | } else { | |
685 | /* Save source address */ | |
686 | bacpy(&bt_sk(sk)->src, &la->l2_bdaddr); | |
687 | l2cap_pi(sk)->psm = la->l2_psm; | |
688 | l2cap_pi(sk)->sport = la->l2_psm; | |
689 | sk->sk_state = BT_BOUND; | |
690 | } | |
691 | ||
692 | write_unlock_bh(&l2cap_sk_list.lock); | |
693 | ||
694 | done: | |
695 | release_sock(sk); | |
696 | return err; | |
697 | } | |
698 | ||
699 | static int l2cap_do_connect(struct sock *sk) | |
700 | { | |
701 | bdaddr_t *src = &bt_sk(sk)->src; | |
702 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
703 | struct l2cap_conn *conn; | |
704 | struct hci_conn *hcon; | |
705 | struct hci_dev *hdev; | |
706 | int err = 0; | |
707 | ||
708 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), l2cap_pi(sk)->psm); | |
709 | ||
710 | if (!(hdev = hci_get_route(dst, src))) | |
711 | return -EHOSTUNREACH; | |
712 | ||
713 | hci_dev_lock_bh(hdev); | |
714 | ||
715 | err = -ENOMEM; | |
716 | ||
717 | hcon = hci_connect(hdev, ACL_LINK, dst); | |
718 | if (!hcon) | |
719 | goto done; | |
720 | ||
721 | conn = l2cap_conn_add(hcon, 0); | |
722 | if (!conn) { | |
723 | hci_conn_put(hcon); | |
724 | goto done; | |
725 | } | |
726 | ||
727 | err = 0; | |
728 | ||
729 | /* Update source addr of the socket */ | |
730 | bacpy(src, conn->src); | |
731 | ||
732 | l2cap_chan_add(conn, sk, NULL); | |
733 | ||
734 | sk->sk_state = BT_CONNECT; | |
735 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
736 | ||
737 | if (hcon->state == BT_CONNECTED) { | |
4e8402a3 MH |
738 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)) { |
739 | l2cap_conn_ready(conn); | |
740 | goto done; | |
741 | } | |
742 | ||
1da177e4 LT |
743 | if (sk->sk_type == SOCK_SEQPACKET) { |
744 | struct l2cap_conn_req req; | |
745 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); | |
aca3192c | 746 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
1da177e4 LT |
747 | req.psm = l2cap_pi(sk)->psm; |
748 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
749 | L2CAP_CONN_REQ, sizeof(req), &req); | |
750 | } else { | |
751 | l2cap_sock_clear_timer(sk); | |
752 | sk->sk_state = BT_CONNECTED; | |
753 | } | |
754 | } | |
755 | ||
756 | done: | |
757 | hci_dev_unlock_bh(hdev); | |
758 | hci_dev_put(hdev); | |
759 | return err; | |
760 | } | |
761 | ||
762 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
763 | { | |
764 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
765 | struct sock *sk = sock->sk; | |
766 | int err = 0; | |
767 | ||
768 | lock_sock(sk); | |
769 | ||
770 | BT_DBG("sk %p", sk); | |
771 | ||
772 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_l2)) { | |
773 | err = -EINVAL; | |
774 | goto done; | |
775 | } | |
776 | ||
777 | if (sk->sk_type == SOCK_SEQPACKET && !la->l2_psm) { | |
778 | err = -EINVAL; | |
779 | goto done; | |
780 | } | |
781 | ||
782 | switch(sk->sk_state) { | |
783 | case BT_CONNECT: | |
784 | case BT_CONNECT2: | |
785 | case BT_CONFIG: | |
786 | /* Already connecting */ | |
787 | goto wait; | |
788 | ||
789 | case BT_CONNECTED: | |
790 | /* Already connected */ | |
791 | goto done; | |
792 | ||
793 | case BT_OPEN: | |
794 | case BT_BOUND: | |
795 | /* Can connect */ | |
796 | break; | |
797 | ||
798 | default: | |
799 | err = -EBADFD; | |
800 | goto done; | |
801 | } | |
802 | ||
803 | /* Set destination address and psm */ | |
804 | bacpy(&bt_sk(sk)->dst, &la->l2_bdaddr); | |
805 | l2cap_pi(sk)->psm = la->l2_psm; | |
806 | ||
807 | if ((err = l2cap_do_connect(sk))) | |
808 | goto done; | |
809 | ||
810 | wait: | |
811 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
812 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
813 | done: | |
814 | release_sock(sk); | |
815 | return err; | |
816 | } | |
817 | ||
818 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
819 | { | |
820 | struct sock *sk = sock->sk; | |
821 | int err = 0; | |
822 | ||
823 | BT_DBG("sk %p backlog %d", sk, backlog); | |
824 | ||
825 | lock_sock(sk); | |
826 | ||
827 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
828 | err = -EBADFD; | |
829 | goto done; | |
830 | } | |
831 | ||
832 | if (!l2cap_pi(sk)->psm) { | |
833 | bdaddr_t *src = &bt_sk(sk)->src; | |
834 | u16 psm; | |
835 | ||
836 | err = -EINVAL; | |
837 | ||
838 | write_lock_bh(&l2cap_sk_list.lock); | |
839 | ||
840 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
6dc0c208 | 841 | if (!__l2cap_get_sock_by_addr(htobs(psm), src)) { |
1da177e4 LT |
842 | l2cap_pi(sk)->psm = htobs(psm); |
843 | l2cap_pi(sk)->sport = htobs(psm); | |
844 | err = 0; | |
845 | break; | |
846 | } | |
847 | ||
848 | write_unlock_bh(&l2cap_sk_list.lock); | |
849 | ||
850 | if (err < 0) | |
851 | goto done; | |
852 | } | |
853 | ||
854 | sk->sk_max_ack_backlog = backlog; | |
855 | sk->sk_ack_backlog = 0; | |
856 | sk->sk_state = BT_LISTEN; | |
857 | ||
858 | done: | |
859 | release_sock(sk); | |
860 | return err; | |
861 | } | |
862 | ||
863 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
864 | { | |
865 | DECLARE_WAITQUEUE(wait, current); | |
866 | struct sock *sk = sock->sk, *nsk; | |
867 | long timeo; | |
868 | int err = 0; | |
869 | ||
fcc70d5f | 870 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
871 | |
872 | if (sk->sk_state != BT_LISTEN) { | |
873 | err = -EBADFD; | |
874 | goto done; | |
875 | } | |
876 | ||
877 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
878 | ||
879 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
880 | ||
881 | /* Wait for an incoming connection. (wake-one). */ | |
882 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
883 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
884 | set_current_state(TASK_INTERRUPTIBLE); | |
885 | if (!timeo) { | |
886 | err = -EAGAIN; | |
887 | break; | |
888 | } | |
889 | ||
890 | release_sock(sk); | |
891 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 892 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
893 | |
894 | if (sk->sk_state != BT_LISTEN) { | |
895 | err = -EBADFD; | |
896 | break; | |
897 | } | |
898 | ||
899 | if (signal_pending(current)) { | |
900 | err = sock_intr_errno(timeo); | |
901 | break; | |
902 | } | |
903 | } | |
904 | set_current_state(TASK_RUNNING); | |
905 | remove_wait_queue(sk->sk_sleep, &wait); | |
906 | ||
907 | if (err) | |
908 | goto done; | |
909 | ||
910 | newsock->state = SS_CONNECTED; | |
911 | ||
912 | BT_DBG("new socket %p", nsk); | |
913 | ||
914 | done: | |
915 | release_sock(sk); | |
916 | return err; | |
917 | } | |
918 | ||
919 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
920 | { | |
921 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
922 | struct sock *sk = sock->sk; | |
923 | ||
924 | BT_DBG("sock %p, sk %p", sock, sk); | |
925 | ||
926 | addr->sa_family = AF_BLUETOOTH; | |
927 | *len = sizeof(struct sockaddr_l2); | |
928 | ||
929 | if (peer) | |
930 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); | |
931 | else | |
932 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); | |
933 | ||
934 | la->l2_psm = l2cap_pi(sk)->psm; | |
935 | return 0; | |
936 | } | |
937 | ||
938 | static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len) | |
939 | { | |
940 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
941 | struct sk_buff *skb, **frag; | |
942 | int err, hlen, count, sent=0; | |
943 | struct l2cap_hdr *lh; | |
944 | ||
945 | BT_DBG("sk %p len %d", sk, len); | |
946 | ||
947 | /* First fragment (with L2CAP header) */ | |
948 | if (sk->sk_type == SOCK_DGRAM) | |
949 | hlen = L2CAP_HDR_SIZE + 2; | |
950 | else | |
951 | hlen = L2CAP_HDR_SIZE; | |
952 | ||
953 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
954 | ||
955 | skb = bt_skb_send_alloc(sk, hlen + count, | |
956 | msg->msg_flags & MSG_DONTWAIT, &err); | |
957 | if (!skb) | |
958 | return err; | |
959 | ||
960 | /* Create L2CAP header */ | |
961 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
962 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
963 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1da177e4 LT |
964 | |
965 | if (sk->sk_type == SOCK_DGRAM) | |
8e036fc3 | 966 | put_unaligned(l2cap_pi(sk)->psm, (__le16 *) skb_put(skb, 2)); |
1da177e4 LT |
967 | |
968 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
969 | err = -EFAULT; | |
970 | goto fail; | |
971 | } | |
972 | ||
973 | sent += count; | |
974 | len -= count; | |
975 | ||
976 | /* Continuation fragments (no L2CAP header) */ | |
977 | frag = &skb_shinfo(skb)->frag_list; | |
978 | while (len) { | |
979 | count = min_t(unsigned int, conn->mtu, len); | |
980 | ||
981 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
982 | if (!*frag) | |
983 | goto fail; | |
8e87d142 | 984 | |
1da177e4 LT |
985 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) { |
986 | err = -EFAULT; | |
987 | goto fail; | |
988 | } | |
989 | ||
990 | sent += count; | |
991 | len -= count; | |
992 | ||
993 | frag = &(*frag)->next; | |
994 | } | |
995 | ||
996 | if ((err = hci_send_acl(conn->hcon, skb, 0)) < 0) | |
997 | goto fail; | |
998 | ||
999 | return sent; | |
1000 | ||
1001 | fail: | |
1002 | kfree_skb(skb); | |
1003 | return err; | |
1004 | } | |
1005 | ||
1006 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
1007 | { | |
1008 | struct sock *sk = sock->sk; | |
1009 | int err = 0; | |
1010 | ||
1011 | BT_DBG("sock %p, sk %p", sock, sk); | |
1012 | ||
c1cbe4b7 BL |
1013 | err = sock_error(sk); |
1014 | if (err) | |
1015 | return err; | |
1da177e4 LT |
1016 | |
1017 | if (msg->msg_flags & MSG_OOB) | |
1018 | return -EOPNOTSUPP; | |
1019 | ||
1020 | /* Check outgoing MTU */ | |
1021 | if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu) | |
1022 | return -EINVAL; | |
1023 | ||
1024 | lock_sock(sk); | |
1025 | ||
1026 | if (sk->sk_state == BT_CONNECTED) | |
1027 | err = l2cap_do_send(sk, msg, len); | |
1028 | else | |
1029 | err = -ENOTCONN; | |
1030 | ||
1031 | release_sock(sk); | |
1032 | return err; | |
1033 | } | |
1034 | ||
1035 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) | |
1036 | { | |
1037 | struct sock *sk = sock->sk; | |
1038 | struct l2cap_options opts; | |
1039 | int err = 0, len; | |
1040 | u32 opt; | |
1041 | ||
1042 | BT_DBG("sk %p", sk); | |
1043 | ||
1044 | lock_sock(sk); | |
1045 | ||
1046 | switch (optname) { | |
1047 | case L2CAP_OPTIONS: | |
0878b666 MH |
1048 | opts.imtu = l2cap_pi(sk)->imtu; |
1049 | opts.omtu = l2cap_pi(sk)->omtu; | |
1050 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
1051 | opts.mode = 0x00; | |
1052 | ||
1da177e4 LT |
1053 | len = min_t(unsigned int, sizeof(opts), optlen); |
1054 | if (copy_from_user((char *) &opts, optval, len)) { | |
1055 | err = -EFAULT; | |
1056 | break; | |
1057 | } | |
0878b666 | 1058 | |
1da177e4 LT |
1059 | l2cap_pi(sk)->imtu = opts.imtu; |
1060 | l2cap_pi(sk)->omtu = opts.omtu; | |
1061 | break; | |
1062 | ||
1063 | case L2CAP_LM: | |
1064 | if (get_user(opt, (u32 __user *) optval)) { | |
1065 | err = -EFAULT; | |
1066 | break; | |
1067 | } | |
1068 | ||
1069 | l2cap_pi(sk)->link_mode = opt; | |
1070 | break; | |
1071 | ||
1072 | default: | |
1073 | err = -ENOPROTOOPT; | |
1074 | break; | |
1075 | } | |
1076 | ||
1077 | release_sock(sk); | |
1078 | return err; | |
1079 | } | |
1080 | ||
1081 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
1082 | { | |
1083 | struct sock *sk = sock->sk; | |
1084 | struct l2cap_options opts; | |
1085 | struct l2cap_conninfo cinfo; | |
1086 | int len, err = 0; | |
1087 | ||
1088 | BT_DBG("sk %p", sk); | |
1089 | ||
1090 | if (get_user(len, optlen)) | |
1091 | return -EFAULT; | |
1092 | ||
1093 | lock_sock(sk); | |
1094 | ||
1095 | switch (optname) { | |
1096 | case L2CAP_OPTIONS: | |
1097 | opts.imtu = l2cap_pi(sk)->imtu; | |
1098 | opts.omtu = l2cap_pi(sk)->omtu; | |
1099 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
1100 | opts.mode = 0x00; | |
1101 | ||
1102 | len = min_t(unsigned int, len, sizeof(opts)); | |
1103 | if (copy_to_user(optval, (char *) &opts, len)) | |
1104 | err = -EFAULT; | |
1105 | ||
1106 | break; | |
1107 | ||
1108 | case L2CAP_LM: | |
1109 | if (put_user(l2cap_pi(sk)->link_mode, (u32 __user *) optval)) | |
1110 | err = -EFAULT; | |
1111 | break; | |
1112 | ||
1113 | case L2CAP_CONNINFO: | |
1114 | if (sk->sk_state != BT_CONNECTED) { | |
1115 | err = -ENOTCONN; | |
1116 | break; | |
1117 | } | |
1118 | ||
1119 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
1120 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
1121 | ||
1122 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
1123 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
1124 | err = -EFAULT; | |
1125 | ||
1126 | break; | |
1127 | ||
1128 | default: | |
1129 | err = -ENOPROTOOPT; | |
1130 | break; | |
1131 | } | |
1132 | ||
1133 | release_sock(sk); | |
1134 | return err; | |
1135 | } | |
1136 | ||
1137 | static int l2cap_sock_shutdown(struct socket *sock, int how) | |
1138 | { | |
1139 | struct sock *sk = sock->sk; | |
1140 | int err = 0; | |
1141 | ||
1142 | BT_DBG("sock %p, sk %p", sock, sk); | |
1143 | ||
1144 | if (!sk) | |
1145 | return 0; | |
1146 | ||
1147 | lock_sock(sk); | |
1148 | if (!sk->sk_shutdown) { | |
1149 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1150 | l2cap_sock_clear_timer(sk); | |
1151 | __l2cap_sock_close(sk, 0); | |
1152 | ||
1153 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
1154 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
1155 | } | |
1156 | release_sock(sk); | |
1157 | return err; | |
1158 | } | |
1159 | ||
1160 | static int l2cap_sock_release(struct socket *sock) | |
1161 | { | |
1162 | struct sock *sk = sock->sk; | |
1163 | int err; | |
1164 | ||
1165 | BT_DBG("sock %p, sk %p", sock, sk); | |
1166 | ||
1167 | if (!sk) | |
1168 | return 0; | |
1169 | ||
1170 | err = l2cap_sock_shutdown(sock, 2); | |
1171 | ||
1172 | sock_orphan(sk); | |
1173 | l2cap_sock_kill(sk); | |
1174 | return err; | |
1175 | } | |
1176 | ||
1da177e4 LT |
1177 | static void l2cap_chan_ready(struct sock *sk) |
1178 | { | |
1179 | struct sock *parent = bt_sk(sk)->parent; | |
1180 | ||
1181 | BT_DBG("sk %p, parent %p", sk, parent); | |
1182 | ||
1183 | l2cap_pi(sk)->conf_state = 0; | |
1184 | l2cap_sock_clear_timer(sk); | |
1185 | ||
1186 | if (!parent) { | |
1187 | /* Outgoing channel. | |
1188 | * Wake up socket sleeping on connect. | |
1189 | */ | |
1190 | sk->sk_state = BT_CONNECTED; | |
1191 | sk->sk_state_change(sk); | |
1192 | } else { | |
1193 | /* Incoming channel. | |
1194 | * Wake up socket sleeping on accept. | |
1195 | */ | |
1196 | parent->sk_data_ready(parent, 0); | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | /* Copy frame to all raw sockets on that connection */ | |
1201 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
1202 | { | |
1203 | struct l2cap_chan_list *l = &conn->chan_list; | |
1204 | struct sk_buff *nskb; | |
1205 | struct sock * sk; | |
1206 | ||
1207 | BT_DBG("conn %p", conn); | |
1208 | ||
1209 | read_lock(&l->lock); | |
1210 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1211 | if (sk->sk_type != SOCK_RAW) | |
1212 | continue; | |
1213 | ||
1214 | /* Don't send frame to the socket it came from */ | |
1215 | if (skb->sk == sk) | |
1216 | continue; | |
1217 | ||
1218 | if (!(nskb = skb_clone(skb, GFP_ATOMIC))) | |
1219 | continue; | |
1220 | ||
1221 | if (sock_queue_rcv_skb(sk, nskb)) | |
1222 | kfree_skb(nskb); | |
1223 | } | |
1224 | read_unlock(&l->lock); | |
1225 | } | |
1226 | ||
1227 | /* ---- L2CAP signalling commands ---- */ | |
1228 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
1229 | u8 code, u8 ident, u16 dlen, void *data) | |
1230 | { | |
1231 | struct sk_buff *skb, **frag; | |
1232 | struct l2cap_cmd_hdr *cmd; | |
1233 | struct l2cap_hdr *lh; | |
1234 | int len, count; | |
1235 | ||
1236 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", conn, code, ident, dlen); | |
1237 | ||
1238 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
1239 | count = min_t(unsigned int, conn->mtu, len); | |
1240 | ||
1241 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
1242 | if (!skb) | |
1243 | return NULL; | |
1244 | ||
1245 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
1246 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
1247 | lh->cid = cpu_to_le16(0x0001); | |
1da177e4 LT |
1248 | |
1249 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
1250 | cmd->code = code; | |
1251 | cmd->ident = ident; | |
aca3192c | 1252 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
1253 | |
1254 | if (dlen) { | |
1255 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
1256 | memcpy(skb_put(skb, count), data, count); | |
1257 | data += count; | |
1258 | } | |
1259 | ||
1260 | len -= skb->len; | |
1261 | ||
1262 | /* Continuation fragments (no L2CAP header) */ | |
1263 | frag = &skb_shinfo(skb)->frag_list; | |
1264 | while (len) { | |
1265 | count = min_t(unsigned int, conn->mtu, len); | |
1266 | ||
1267 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
1268 | if (!*frag) | |
1269 | goto fail; | |
1270 | ||
1271 | memcpy(skb_put(*frag, count), data, count); | |
1272 | ||
1273 | len -= count; | |
1274 | data += count; | |
1275 | ||
1276 | frag = &(*frag)->next; | |
1277 | } | |
1278 | ||
1279 | return skb; | |
1280 | ||
1281 | fail: | |
1282 | kfree_skb(skb); | |
1283 | return NULL; | |
1284 | } | |
1285 | ||
1286 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
1287 | { | |
1288 | struct l2cap_conf_opt *opt = *ptr; | |
1289 | int len; | |
1290 | ||
1291 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
1292 | *ptr += len; | |
1293 | ||
1294 | *type = opt->type; | |
1295 | *olen = opt->len; | |
1296 | ||
1297 | switch (opt->len) { | |
1298 | case 1: | |
1299 | *val = *((u8 *) opt->val); | |
1300 | break; | |
1301 | ||
1302 | case 2: | |
861d6882 | 1303 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
1304 | break; |
1305 | ||
1306 | case 4: | |
861d6882 | 1307 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
1308 | break; |
1309 | ||
1310 | default: | |
1311 | *val = (unsigned long) opt->val; | |
1312 | break; | |
1313 | } | |
1314 | ||
1315 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
1316 | return len; | |
1317 | } | |
1318 | ||
1da177e4 LT |
1319 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
1320 | { | |
1321 | struct l2cap_conf_opt *opt = *ptr; | |
1322 | ||
1323 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
1324 | ||
1325 | opt->type = type; | |
1326 | opt->len = len; | |
1327 | ||
1328 | switch (len) { | |
1329 | case 1: | |
1330 | *((u8 *) opt->val) = val; | |
1331 | break; | |
1332 | ||
1333 | case 2: | |
8e036fc3 | 1334 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
1335 | break; |
1336 | ||
1337 | case 4: | |
8e036fc3 | 1338 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
1339 | break; |
1340 | ||
1341 | default: | |
1342 | memcpy(opt->val, (void *) val, len); | |
1343 | break; | |
1344 | } | |
1345 | ||
1346 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
1347 | } | |
1348 | ||
1349 | static int l2cap_build_conf_req(struct sock *sk, void *data) | |
1350 | { | |
1351 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1352 | struct l2cap_conf_req *req = data; | |
1353 | void *ptr = req->data; | |
1354 | ||
1355 | BT_DBG("sk %p", sk); | |
1356 | ||
1357 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
1358 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
1359 | ||
1360 | /* FIXME: Need actual value of the flush timeout */ | |
1361 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
1362 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
1363 | ||
aca3192c YH |
1364 | req->dcid = cpu_to_le16(pi->dcid); |
1365 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
1366 | |
1367 | return ptr - data; | |
1368 | } | |
1369 | ||
5dee9e7c | 1370 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
1371 | { |
1372 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
1373 | struct l2cap_conf_rsp *rsp = data; |
1374 | void *ptr = rsp->data; | |
1375 | void *req = pi->conf_req; | |
1376 | int len = pi->conf_len; | |
1377 | int type, hint, olen; | |
1378 | unsigned long val; | |
861d6882 | 1379 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 1380 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 1381 | |
5dee9e7c | 1382 | BT_DBG("sk %p", sk); |
820ae1b8 | 1383 | |
5dee9e7c MH |
1384 | while (len >= L2CAP_CONF_OPT_SIZE) { |
1385 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 1386 | |
5dee9e7c MH |
1387 | hint = type & 0x80; |
1388 | type &= 0x7f; | |
1389 | ||
1390 | switch (type) { | |
1391 | case L2CAP_CONF_MTU: | |
861d6882 | 1392 | mtu = val; |
5dee9e7c MH |
1393 | break; |
1394 | ||
1395 | case L2CAP_CONF_FLUSH_TO: | |
1396 | pi->flush_to = val; | |
1397 | break; | |
1398 | ||
1399 | case L2CAP_CONF_QOS: | |
1400 | break; | |
1401 | ||
1402 | default: | |
1403 | if (hint) | |
1404 | break; | |
1405 | ||
1406 | result = L2CAP_CONF_UNKNOWN; | |
1407 | *((u8 *) ptr++) = type; | |
1408 | break; | |
1409 | } | |
1410 | } | |
1411 | ||
1412 | if (result == L2CAP_CONF_SUCCESS) { | |
1413 | /* Configure output options and let the other side know | |
1414 | * which ones we don't like. */ | |
1415 | ||
861d6882 | 1416 | if (mtu < pi->omtu) |
5dee9e7c | 1417 | result = L2CAP_CONF_UNACCEPT; |
876d9484 | 1418 | else { |
861d6882 | 1419 | pi->omtu = mtu; |
876d9484 MH |
1420 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; |
1421 | } | |
5dee9e7c MH |
1422 | |
1423 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
1424 | } | |
1425 | ||
1426 | rsp->scid = cpu_to_le16(pi->dcid); | |
1427 | rsp->result = cpu_to_le16(result); | |
1428 | rsp->flags = cpu_to_le16(0x0000); | |
1429 | ||
1430 | return ptr - data; | |
1da177e4 LT |
1431 | } |
1432 | ||
5dee9e7c | 1433 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
1434 | { |
1435 | struct l2cap_conf_rsp *rsp = data; | |
1436 | void *ptr = rsp->data; | |
1da177e4 | 1437 | |
5dee9e7c | 1438 | BT_DBG("sk %p", sk); |
1da177e4 | 1439 | |
aca3192c | 1440 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 1441 | rsp->result = cpu_to_le16(result); |
aca3192c | 1442 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
1443 | |
1444 | return ptr - data; | |
1445 | } | |
1446 | ||
4e8402a3 MH |
1447 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1448 | { | |
1449 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
1450 | ||
1451 | if (rej->reason != 0x0000) | |
1452 | return 0; | |
1453 | ||
1454 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
1455 | cmd->ident == conn->info_ident) { | |
1456 | conn->info_ident = 0; | |
1457 | del_timer(&conn->info_timer); | |
1458 | l2cap_conn_start(conn); | |
1459 | } | |
1460 | ||
1461 | return 0; | |
1462 | } | |
1463 | ||
1da177e4 LT |
1464 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1465 | { | |
1466 | struct l2cap_chan_list *list = &conn->chan_list; | |
1467 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
1468 | struct l2cap_conn_rsp rsp; | |
1469 | struct sock *sk, *parent; | |
1470 | int result = 0, status = 0; | |
1471 | ||
1472 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
8e036fc3 | 1473 | __le16 psm = req->psm; |
1da177e4 LT |
1474 | |
1475 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
1476 | ||
1477 | /* Check if we have socket listening on psm */ | |
1478 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
1479 | if (!parent) { | |
1480 | result = L2CAP_CR_BAD_PSM; | |
1481 | goto sendresp; | |
1482 | } | |
1483 | ||
1484 | result = L2CAP_CR_NO_MEM; | |
1485 | ||
1486 | /* Check for backlog size */ | |
1487 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 1488 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
1489 | goto response; |
1490 | } | |
1491 | ||
1b8d7ae4 | 1492 | sk = l2cap_sock_alloc(parent->sk_net, NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
1493 | if (!sk) |
1494 | goto response; | |
1495 | ||
fd1278d7 | 1496 | write_lock_bh(&list->lock); |
1da177e4 LT |
1497 | |
1498 | /* Check if we already have channel with that dcid */ | |
1499 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 1500 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1501 | sock_set_flag(sk, SOCK_ZAPPED); |
1502 | l2cap_sock_kill(sk); | |
1503 | goto response; | |
1504 | } | |
1505 | ||
1506 | hci_conn_hold(conn->hcon); | |
1507 | ||
1508 | l2cap_sock_init(sk, parent); | |
1509 | bacpy(&bt_sk(sk)->src, conn->src); | |
1510 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
1511 | l2cap_pi(sk)->psm = psm; | |
1512 | l2cap_pi(sk)->dcid = scid; | |
1513 | ||
1514 | __l2cap_chan_add(conn, sk, parent); | |
1515 | dcid = l2cap_pi(sk)->scid; | |
1516 | ||
1517 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1518 | ||
1519 | /* Service level security */ | |
1520 | result = L2CAP_CR_PEND; | |
1521 | status = L2CAP_CS_AUTHEN_PEND; | |
1522 | sk->sk_state = BT_CONNECT2; | |
1523 | l2cap_pi(sk)->ident = cmd->ident; | |
1524 | ||
1525 | if ((l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) || | |
1526 | (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) { | |
1527 | if (!hci_conn_encrypt(conn->hcon)) | |
1528 | goto done; | |
1529 | } else if (l2cap_pi(sk)->link_mode & L2CAP_LM_AUTH) { | |
1530 | if (!hci_conn_auth(conn->hcon)) | |
1531 | goto done; | |
1532 | } | |
1533 | ||
1534 | sk->sk_state = BT_CONFIG; | |
1535 | result = status = 0; | |
1536 | ||
1537 | done: | |
fd1278d7 | 1538 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1539 | |
1540 | response: | |
1541 | bh_unlock_sock(parent); | |
1542 | ||
1543 | sendresp: | |
aca3192c YH |
1544 | rsp.scid = cpu_to_le16(scid); |
1545 | rsp.dcid = cpu_to_le16(dcid); | |
1546 | rsp.result = cpu_to_le16(result); | |
1547 | rsp.status = cpu_to_le16(status); | |
1da177e4 LT |
1548 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
1549 | return 0; | |
1550 | } | |
1551 | ||
1552 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1553 | { | |
1554 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
1555 | u16 scid, dcid, result, status; | |
1556 | struct sock *sk; | |
1557 | u8 req[128]; | |
1558 | ||
1559 | scid = __le16_to_cpu(rsp->scid); | |
1560 | dcid = __le16_to_cpu(rsp->dcid); | |
1561 | result = __le16_to_cpu(rsp->result); | |
1562 | status = __le16_to_cpu(rsp->status); | |
1563 | ||
1564 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
1565 | ||
1566 | if (scid) { | |
1567 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1568 | return 0; | |
1569 | } else { | |
1570 | if (!(sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident))) | |
1571 | return 0; | |
1572 | } | |
1573 | ||
1574 | switch (result) { | |
1575 | case L2CAP_CR_SUCCESS: | |
1576 | sk->sk_state = BT_CONFIG; | |
1577 | l2cap_pi(sk)->ident = 0; | |
1578 | l2cap_pi(sk)->dcid = dcid; | |
1579 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
1580 | ||
1581 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1582 | l2cap_build_conf_req(sk, req), req); | |
1583 | break; | |
1584 | ||
1585 | case L2CAP_CR_PEND: | |
1586 | break; | |
1587 | ||
1588 | default: | |
1589 | l2cap_chan_del(sk, ECONNREFUSED); | |
1590 | break; | |
1591 | } | |
1592 | ||
1593 | bh_unlock_sock(sk); | |
1594 | return 0; | |
1595 | } | |
1596 | ||
88219a0f | 1597 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
1598 | { |
1599 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
1600 | u16 dcid, flags; | |
1601 | u8 rsp[64]; | |
1602 | struct sock *sk; | |
5dee9e7c | 1603 | int len; |
1da177e4 LT |
1604 | |
1605 | dcid = __le16_to_cpu(req->dcid); | |
1606 | flags = __le16_to_cpu(req->flags); | |
1607 | ||
1608 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
1609 | ||
1610 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
1611 | return -ENOENT; | |
1612 | ||
354f60a9 MH |
1613 | if (sk->sk_state == BT_DISCONN) |
1614 | goto unlock; | |
1615 | ||
5dee9e7c | 1616 | /* Reject if config buffer is too small. */ |
88219a0f | 1617 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
1618 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
1619 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
1620 | l2cap_build_conf_rsp(sk, rsp, | |
1621 | L2CAP_CONF_REJECT, flags), rsp); | |
1622 | goto unlock; | |
1623 | } | |
1624 | ||
1625 | /* Store config. */ | |
1626 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
1627 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
1628 | |
1629 | if (flags & 0x0001) { | |
1630 | /* Incomplete config. Send empty response. */ | |
1631 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
1632 | l2cap_build_conf_rsp(sk, rsp, |
1633 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
1634 | goto unlock; |
1635 | } | |
1636 | ||
1637 | /* Complete config. */ | |
5dee9e7c MH |
1638 | len = l2cap_parse_conf_req(sk, rsp); |
1639 | if (len < 0) | |
1da177e4 LT |
1640 | goto unlock; |
1641 | ||
5dee9e7c MH |
1642 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
1643 | ||
5dee9e7c MH |
1644 | /* Reset config buffer. */ |
1645 | l2cap_pi(sk)->conf_len = 0; | |
1646 | ||
876d9484 MH |
1647 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
1648 | goto unlock; | |
1649 | ||
1da177e4 LT |
1650 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
1651 | sk->sk_state = BT_CONNECTED; | |
1652 | l2cap_chan_ready(sk); | |
876d9484 MH |
1653 | goto unlock; |
1654 | } | |
1655 | ||
1656 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
1da177e4 LT |
1657 | u8 req[64]; |
1658 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1659 | l2cap_build_conf_req(sk, req), req); | |
1660 | } | |
1661 | ||
1662 | unlock: | |
1663 | bh_unlock_sock(sk); | |
1664 | return 0; | |
1665 | } | |
1666 | ||
1667 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1668 | { | |
1669 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
1670 | u16 scid, flags, result; | |
1671 | struct sock *sk; | |
1672 | ||
1673 | scid = __le16_to_cpu(rsp->scid); | |
1674 | flags = __le16_to_cpu(rsp->flags); | |
1675 | result = __le16_to_cpu(rsp->result); | |
1676 | ||
1677 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", scid, flags, result); | |
1678 | ||
1679 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1680 | return 0; | |
1681 | ||
1682 | switch (result) { | |
1683 | case L2CAP_CONF_SUCCESS: | |
1684 | break; | |
1685 | ||
1686 | case L2CAP_CONF_UNACCEPT: | |
1687 | if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) { | |
1688 | char req[128]; | |
1689 | /* It does not make sense to adjust L2CAP parameters | |
1690 | * that are currently defined in the spec. We simply | |
1691 | * resend config request that we sent earlier. It is | |
1692 | * stupid, but it helps qualification testing which | |
1693 | * expects at least some response from us. */ | |
1694 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1695 | l2cap_build_conf_req(sk, req), req); | |
1696 | goto done; | |
1697 | } | |
1698 | ||
8e87d142 | 1699 | default: |
1da177e4 LT |
1700 | sk->sk_state = BT_DISCONN; |
1701 | sk->sk_err = ECONNRESET; | |
1702 | l2cap_sock_set_timer(sk, HZ * 5); | |
1703 | { | |
1704 | struct l2cap_disconn_req req; | |
aca3192c YH |
1705 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
1706 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
1707 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
1708 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
1709 | } | |
1710 | goto done; | |
1711 | } | |
1712 | ||
1713 | if (flags & 0x01) | |
1714 | goto done; | |
1715 | ||
1da177e4 LT |
1716 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
1717 | ||
1718 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
1719 | sk->sk_state = BT_CONNECTED; | |
1720 | l2cap_chan_ready(sk); | |
1721 | } | |
1722 | ||
1723 | done: | |
1724 | bh_unlock_sock(sk); | |
1725 | return 0; | |
1726 | } | |
1727 | ||
1728 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1729 | { | |
1730 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
1731 | struct l2cap_disconn_rsp rsp; | |
1732 | u16 dcid, scid; | |
1733 | struct sock *sk; | |
1734 | ||
1735 | scid = __le16_to_cpu(req->scid); | |
1736 | dcid = __le16_to_cpu(req->dcid); | |
1737 | ||
1738 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
1739 | ||
1740 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
1741 | return 0; | |
1742 | ||
aca3192c YH |
1743 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
1744 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
1745 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
1746 | ||
1747 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1748 | ||
1749 | l2cap_chan_del(sk, ECONNRESET); | |
1750 | bh_unlock_sock(sk); | |
1751 | ||
1752 | l2cap_sock_kill(sk); | |
1753 | return 0; | |
1754 | } | |
1755 | ||
1756 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1757 | { | |
1758 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
1759 | u16 dcid, scid; | |
1760 | struct sock *sk; | |
1761 | ||
1762 | scid = __le16_to_cpu(rsp->scid); | |
1763 | dcid = __le16_to_cpu(rsp->dcid); | |
1764 | ||
1765 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
1766 | ||
1767 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1768 | return 0; | |
1769 | ||
1770 | l2cap_chan_del(sk, 0); | |
1771 | bh_unlock_sock(sk); | |
1772 | ||
1773 | l2cap_sock_kill(sk); | |
1774 | return 0; | |
1775 | } | |
1776 | ||
1777 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1778 | { | |
1779 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
1780 | u16 type; |
1781 | ||
1782 | type = __le16_to_cpu(req->type); | |
1783 | ||
1784 | BT_DBG("type 0x%4.4x", type); | |
1785 | ||
f0709e03 MH |
1786 | if (type == L2CAP_IT_FEAT_MASK) { |
1787 | u8 buf[8]; | |
1788 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
1789 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
1790 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
1791 | put_unaligned(cpu_to_le32(l2cap_feat_mask), (__le32 *) rsp->data); | |
1792 | l2cap_send_cmd(conn, cmd->ident, | |
1793 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
1794 | } else { | |
1795 | struct l2cap_info_rsp rsp; | |
1796 | rsp.type = cpu_to_le16(type); | |
1797 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
1798 | l2cap_send_cmd(conn, cmd->ident, | |
1799 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
1800 | } | |
1da177e4 LT |
1801 | |
1802 | return 0; | |
1803 | } | |
1804 | ||
1805 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1806 | { | |
1807 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
1808 | u16 type, result; | |
1809 | ||
1810 | type = __le16_to_cpu(rsp->type); | |
1811 | result = __le16_to_cpu(rsp->result); | |
1812 | ||
1813 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
1814 | ||
4e8402a3 MH |
1815 | conn->info_ident = 0; |
1816 | ||
1817 | del_timer(&conn->info_timer); | |
1818 | ||
1819 | if (type == L2CAP_IT_FEAT_MASK) | |
1820 | conn->feat_mask = __le32_to_cpu(get_unaligned((__le32 *) rsp->data)); | |
1821 | ||
1822 | l2cap_conn_start(conn); | |
1823 | ||
1da177e4 LT |
1824 | return 0; |
1825 | } | |
1826 | ||
1827 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
1828 | { | |
1829 | u8 *data = skb->data; | |
1830 | int len = skb->len; | |
1831 | struct l2cap_cmd_hdr cmd; | |
1832 | int err = 0; | |
1833 | ||
1834 | l2cap_raw_recv(conn, skb); | |
1835 | ||
1836 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 1837 | u16 cmd_len; |
1da177e4 LT |
1838 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
1839 | data += L2CAP_CMD_HDR_SIZE; | |
1840 | len -= L2CAP_CMD_HDR_SIZE; | |
1841 | ||
88219a0f | 1842 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 1843 | |
88219a0f | 1844 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 1845 | |
88219a0f | 1846 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
1847 | BT_DBG("corrupted command"); |
1848 | break; | |
1849 | } | |
1850 | ||
1851 | switch (cmd.code) { | |
1852 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 1853 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
1854 | break; |
1855 | ||
1856 | case L2CAP_CONN_REQ: | |
1857 | err = l2cap_connect_req(conn, &cmd, data); | |
1858 | break; | |
1859 | ||
1860 | case L2CAP_CONN_RSP: | |
1861 | err = l2cap_connect_rsp(conn, &cmd, data); | |
1862 | break; | |
1863 | ||
1864 | case L2CAP_CONF_REQ: | |
88219a0f | 1865 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
1866 | break; |
1867 | ||
1868 | case L2CAP_CONF_RSP: | |
1869 | err = l2cap_config_rsp(conn, &cmd, data); | |
1870 | break; | |
1871 | ||
1872 | case L2CAP_DISCONN_REQ: | |
1873 | err = l2cap_disconnect_req(conn, &cmd, data); | |
1874 | break; | |
1875 | ||
1876 | case L2CAP_DISCONN_RSP: | |
1877 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
1878 | break; | |
1879 | ||
1880 | case L2CAP_ECHO_REQ: | |
88219a0f | 1881 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
1882 | break; |
1883 | ||
1884 | case L2CAP_ECHO_RSP: | |
1885 | break; | |
1886 | ||
1887 | case L2CAP_INFO_REQ: | |
1888 | err = l2cap_information_req(conn, &cmd, data); | |
1889 | break; | |
1890 | ||
1891 | case L2CAP_INFO_RSP: | |
1892 | err = l2cap_information_rsp(conn, &cmd, data); | |
1893 | break; | |
1894 | ||
1895 | default: | |
1896 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
1897 | err = -EINVAL; | |
1898 | break; | |
1899 | } | |
1900 | ||
1901 | if (err) { | |
1902 | struct l2cap_cmd_rej rej; | |
1903 | BT_DBG("error %d", err); | |
1904 | ||
1905 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 1906 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
1907 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
1908 | } | |
1909 | ||
88219a0f AV |
1910 | data += cmd_len; |
1911 | len -= cmd_len; | |
1da177e4 LT |
1912 | } |
1913 | ||
1914 | kfree_skb(skb); | |
1915 | } | |
1916 | ||
1917 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) | |
1918 | { | |
1919 | struct sock *sk; | |
1920 | ||
1921 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
1922 | if (!sk) { | |
1923 | BT_DBG("unknown cid 0x%4.4x", cid); | |
1924 | goto drop; | |
1925 | } | |
1926 | ||
1927 | BT_DBG("sk %p, len %d", sk, skb->len); | |
1928 | ||
1929 | if (sk->sk_state != BT_CONNECTED) | |
1930 | goto drop; | |
1931 | ||
1932 | if (l2cap_pi(sk)->imtu < skb->len) | |
1933 | goto drop; | |
1934 | ||
1935 | /* If socket recv buffers overflows we drop data here | |
1936 | * which is *bad* because L2CAP has to be reliable. | |
1937 | * But we don't have any other choice. L2CAP doesn't | |
1938 | * provide flow control mechanism. */ | |
1939 | ||
1940 | if (!sock_queue_rcv_skb(sk, skb)) | |
1941 | goto done; | |
1942 | ||
1943 | drop: | |
1944 | kfree_skb(skb); | |
1945 | ||
1946 | done: | |
0139418c MH |
1947 | if (sk) |
1948 | bh_unlock_sock(sk); | |
1949 | ||
1da177e4 LT |
1950 | return 0; |
1951 | } | |
1952 | ||
8e036fc3 | 1953 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
1954 | { |
1955 | struct sock *sk; | |
1956 | ||
1957 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
1958 | if (!sk) | |
1959 | goto drop; | |
1960 | ||
1961 | BT_DBG("sk %p, len %d", sk, skb->len); | |
1962 | ||
1963 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
1964 | goto drop; | |
1965 | ||
1966 | if (l2cap_pi(sk)->imtu < skb->len) | |
1967 | goto drop; | |
1968 | ||
1969 | if (!sock_queue_rcv_skb(sk, skb)) | |
1970 | goto done; | |
1971 | ||
1972 | drop: | |
1973 | kfree_skb(skb); | |
1974 | ||
1975 | done: | |
1976 | if (sk) bh_unlock_sock(sk); | |
1977 | return 0; | |
1978 | } | |
1979 | ||
1980 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
1981 | { | |
1982 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
1983 | u16 cid, len; |
1984 | __le16 psm; | |
1da177e4 LT |
1985 | |
1986 | skb_pull(skb, L2CAP_HDR_SIZE); | |
1987 | cid = __le16_to_cpu(lh->cid); | |
1988 | len = __le16_to_cpu(lh->len); | |
1989 | ||
1990 | BT_DBG("len %d, cid 0x%4.4x", len, cid); | |
1991 | ||
1992 | switch (cid) { | |
1993 | case 0x0001: | |
1994 | l2cap_sig_channel(conn, skb); | |
1995 | break; | |
1996 | ||
1997 | case 0x0002: | |
8e036fc3 | 1998 | psm = get_unaligned((__le16 *) skb->data); |
1da177e4 LT |
1999 | skb_pull(skb, 2); |
2000 | l2cap_conless_channel(conn, psm, skb); | |
2001 | break; | |
2002 | ||
2003 | default: | |
2004 | l2cap_data_channel(conn, cid, skb); | |
2005 | break; | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
2010 | ||
2011 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
2012 | { | |
2013 | int exact = 0, lm1 = 0, lm2 = 0; | |
2014 | register struct sock *sk; | |
2015 | struct hlist_node *node; | |
2016 | ||
2017 | if (type != ACL_LINK) | |
2018 | return 0; | |
2019 | ||
2020 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
2021 | ||
2022 | /* Find listening sockets and check their link_mode */ | |
2023 | read_lock(&l2cap_sk_list.lock); | |
2024 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
2025 | if (sk->sk_state != BT_LISTEN) | |
2026 | continue; | |
2027 | ||
2028 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2029 | lm1 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode); | |
2030 | exact++; | |
2031 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
2032 | lm2 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode); | |
2033 | } | |
2034 | read_unlock(&l2cap_sk_list.lock); | |
2035 | ||
2036 | return exact ? lm1 : lm2; | |
2037 | } | |
2038 | ||
2039 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
2040 | { | |
0139418c MH |
2041 | struct l2cap_conn *conn; |
2042 | ||
1da177e4 LT |
2043 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
2044 | ||
2045 | if (hcon->type != ACL_LINK) | |
2046 | return 0; | |
2047 | ||
2048 | if (!status) { | |
1da177e4 LT |
2049 | conn = l2cap_conn_add(hcon, status); |
2050 | if (conn) | |
2051 | l2cap_conn_ready(conn); | |
0139418c | 2052 | } else |
1da177e4 LT |
2053 | l2cap_conn_del(hcon, bt_err(status)); |
2054 | ||
2055 | return 0; | |
2056 | } | |
2057 | ||
2058 | static int l2cap_disconn_ind(struct hci_conn *hcon, u8 reason) | |
2059 | { | |
2060 | BT_DBG("hcon %p reason %d", hcon, reason); | |
2061 | ||
2062 | if (hcon->type != ACL_LINK) | |
2063 | return 0; | |
2064 | ||
2065 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 2066 | |
1da177e4 LT |
2067 | return 0; |
2068 | } | |
2069 | ||
2070 | static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status) | |
2071 | { | |
2072 | struct l2cap_chan_list *l; | |
0139418c | 2073 | struct l2cap_conn *conn = conn = hcon->l2cap_data; |
1da177e4 LT |
2074 | struct l2cap_conn_rsp rsp; |
2075 | struct sock *sk; | |
2076 | int result; | |
2077 | ||
0139418c | 2078 | if (!conn) |
1da177e4 | 2079 | return 0; |
0139418c | 2080 | |
1da177e4 LT |
2081 | l = &conn->chan_list; |
2082 | ||
2083 | BT_DBG("conn %p", conn); | |
2084 | ||
2085 | read_lock(&l->lock); | |
2086 | ||
2087 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2088 | bh_lock_sock(sk); | |
2089 | ||
2090 | if (sk->sk_state != BT_CONNECT2 || | |
2091 | (l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) || | |
2092 | (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) { | |
2093 | bh_unlock_sock(sk); | |
2094 | continue; | |
2095 | } | |
2096 | ||
2097 | if (!status) { | |
2098 | sk->sk_state = BT_CONFIG; | |
2099 | result = 0; | |
2100 | } else { | |
2101 | sk->sk_state = BT_DISCONN; | |
2102 | l2cap_sock_set_timer(sk, HZ/10); | |
2103 | result = L2CAP_CR_SEC_BLOCK; | |
2104 | } | |
2105 | ||
aca3192c YH |
2106 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
2107 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2108 | rsp.result = cpu_to_le16(result); | |
2109 | rsp.status = cpu_to_le16(0); | |
1da177e4 LT |
2110 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2111 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
2112 | ||
2113 | bh_unlock_sock(sk); | |
2114 | } | |
2115 | ||
2116 | read_unlock(&l->lock); | |
2117 | return 0; | |
2118 | } | |
2119 | ||
2120 | static int l2cap_encrypt_cfm(struct hci_conn *hcon, u8 status) | |
2121 | { | |
2122 | struct l2cap_chan_list *l; | |
0139418c | 2123 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
2124 | struct l2cap_conn_rsp rsp; |
2125 | struct sock *sk; | |
2126 | int result; | |
2127 | ||
0139418c | 2128 | if (!conn) |
1da177e4 | 2129 | return 0; |
0139418c | 2130 | |
1da177e4 LT |
2131 | l = &conn->chan_list; |
2132 | ||
2133 | BT_DBG("conn %p", conn); | |
2134 | ||
2135 | read_lock(&l->lock); | |
2136 | ||
2137 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2138 | bh_lock_sock(sk); | |
2139 | ||
2140 | if (sk->sk_state != BT_CONNECT2) { | |
2141 | bh_unlock_sock(sk); | |
2142 | continue; | |
2143 | } | |
2144 | ||
2145 | if (!status) { | |
2146 | sk->sk_state = BT_CONFIG; | |
2147 | result = 0; | |
2148 | } else { | |
2149 | sk->sk_state = BT_DISCONN; | |
2150 | l2cap_sock_set_timer(sk, HZ/10); | |
2151 | result = L2CAP_CR_SEC_BLOCK; | |
2152 | } | |
2153 | ||
aca3192c YH |
2154 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
2155 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2156 | rsp.result = cpu_to_le16(result); | |
2157 | rsp.status = cpu_to_le16(0); | |
1da177e4 LT |
2158 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2159 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
2160 | ||
2161 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE) | |
2162 | hci_conn_change_link_key(hcon); | |
2163 | ||
2164 | bh_unlock_sock(sk); | |
2165 | } | |
2166 | ||
2167 | read_unlock(&l->lock); | |
2168 | return 0; | |
2169 | } | |
2170 | ||
2171 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
2172 | { | |
2173 | struct l2cap_conn *conn = hcon->l2cap_data; | |
2174 | ||
2175 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
2176 | goto drop; | |
2177 | ||
2178 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
2179 | ||
2180 | if (flags & ACL_START) { | |
2181 | struct l2cap_hdr *hdr; | |
2182 | int len; | |
2183 | ||
2184 | if (conn->rx_len) { | |
2185 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
2186 | kfree_skb(conn->rx_skb); | |
2187 | conn->rx_skb = NULL; | |
2188 | conn->rx_len = 0; | |
2189 | l2cap_conn_unreliable(conn, ECOMM); | |
2190 | } | |
2191 | ||
2192 | if (skb->len < 2) { | |
2193 | BT_ERR("Frame is too short (len %d)", skb->len); | |
2194 | l2cap_conn_unreliable(conn, ECOMM); | |
2195 | goto drop; | |
2196 | } | |
2197 | ||
2198 | hdr = (struct l2cap_hdr *) skb->data; | |
2199 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
2200 | ||
2201 | if (len == skb->len) { | |
2202 | /* Complete frame received */ | |
2203 | l2cap_recv_frame(conn, skb); | |
2204 | return 0; | |
2205 | } | |
2206 | ||
2207 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
2208 | ||
2209 | if (skb->len > len) { | |
2210 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
2211 | skb->len, len); | |
2212 | l2cap_conn_unreliable(conn, ECOMM); | |
2213 | goto drop; | |
2214 | } | |
2215 | ||
2216 | /* Allocate skb for the complete frame (with header) */ | |
2217 | if (!(conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC))) | |
2218 | goto drop; | |
2219 | ||
d626f62b ACM |
2220 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
2221 | skb->len); | |
1da177e4 LT |
2222 | conn->rx_len = len - skb->len; |
2223 | } else { | |
2224 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
2225 | ||
2226 | if (!conn->rx_len) { | |
2227 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
2228 | l2cap_conn_unreliable(conn, ECOMM); | |
2229 | goto drop; | |
2230 | } | |
2231 | ||
2232 | if (skb->len > conn->rx_len) { | |
2233 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
2234 | skb->len, conn->rx_len); | |
2235 | kfree_skb(conn->rx_skb); | |
2236 | conn->rx_skb = NULL; | |
2237 | conn->rx_len = 0; | |
2238 | l2cap_conn_unreliable(conn, ECOMM); | |
2239 | goto drop; | |
2240 | } | |
2241 | ||
d626f62b ACM |
2242 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
2243 | skb->len); | |
1da177e4 LT |
2244 | conn->rx_len -= skb->len; |
2245 | ||
2246 | if (!conn->rx_len) { | |
2247 | /* Complete frame received */ | |
2248 | l2cap_recv_frame(conn, conn->rx_skb); | |
2249 | conn->rx_skb = NULL; | |
2250 | } | |
2251 | } | |
2252 | ||
2253 | drop: | |
2254 | kfree_skb(skb); | |
2255 | return 0; | |
2256 | } | |
2257 | ||
be9d1227 | 2258 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
2259 | { |
2260 | struct sock *sk; | |
2261 | struct hlist_node *node; | |
be9d1227 | 2262 | char *str = buf; |
1da177e4 LT |
2263 | |
2264 | read_lock_bh(&l2cap_sk_list.lock); | |
2265 | ||
be9d1227 MH |
2266 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
2267 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1da177e4 | 2268 | |
be9d1227 MH |
2269 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d 0x%x\n", |
2270 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), | |
73863976 MH |
2271 | sk->sk_state, btohs(pi->psm), pi->scid, pi->dcid, |
2272 | pi->imtu, pi->omtu, pi->link_mode); | |
be9d1227 | 2273 | } |
1da177e4 | 2274 | |
1da177e4 | 2275 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 2276 | |
be9d1227 | 2277 | return (str - buf); |
1da177e4 LT |
2278 | } |
2279 | ||
be9d1227 | 2280 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
1da177e4 | 2281 | |
90ddc4f0 | 2282 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
2283 | .family = PF_BLUETOOTH, |
2284 | .owner = THIS_MODULE, | |
2285 | .release = l2cap_sock_release, | |
2286 | .bind = l2cap_sock_bind, | |
2287 | .connect = l2cap_sock_connect, | |
2288 | .listen = l2cap_sock_listen, | |
2289 | .accept = l2cap_sock_accept, | |
2290 | .getname = l2cap_sock_getname, | |
2291 | .sendmsg = l2cap_sock_sendmsg, | |
2292 | .recvmsg = bt_sock_recvmsg, | |
2293 | .poll = bt_sock_poll, | |
2294 | .mmap = sock_no_mmap, | |
2295 | .socketpair = sock_no_socketpair, | |
2296 | .ioctl = sock_no_ioctl, | |
2297 | .shutdown = l2cap_sock_shutdown, | |
2298 | .setsockopt = l2cap_sock_setsockopt, | |
2299 | .getsockopt = l2cap_sock_getsockopt | |
2300 | }; | |
2301 | ||
2302 | static struct net_proto_family l2cap_sock_family_ops = { | |
2303 | .family = PF_BLUETOOTH, | |
2304 | .owner = THIS_MODULE, | |
2305 | .create = l2cap_sock_create, | |
2306 | }; | |
2307 | ||
2308 | static struct hci_proto l2cap_hci_proto = { | |
2309 | .name = "L2CAP", | |
2310 | .id = HCI_PROTO_L2CAP, | |
2311 | .connect_ind = l2cap_connect_ind, | |
2312 | .connect_cfm = l2cap_connect_cfm, | |
2313 | .disconn_ind = l2cap_disconn_ind, | |
2314 | .auth_cfm = l2cap_auth_cfm, | |
2315 | .encrypt_cfm = l2cap_encrypt_cfm, | |
2316 | .recv_acldata = l2cap_recv_acldata | |
2317 | }; | |
2318 | ||
2319 | static int __init l2cap_init(void) | |
2320 | { | |
2321 | int err; | |
be9d1227 | 2322 | |
1da177e4 LT |
2323 | err = proto_register(&l2cap_proto, 0); |
2324 | if (err < 0) | |
2325 | return err; | |
2326 | ||
2327 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
2328 | if (err < 0) { | |
2329 | BT_ERR("L2CAP socket registration failed"); | |
2330 | goto error; | |
2331 | } | |
2332 | ||
2333 | err = hci_register_proto(&l2cap_hci_proto); | |
2334 | if (err < 0) { | |
2335 | BT_ERR("L2CAP protocol registration failed"); | |
2336 | bt_sock_unregister(BTPROTO_L2CAP); | |
2337 | goto error; | |
2338 | } | |
2339 | ||
df5c37ea MH |
2340 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
2341 | BT_ERR("Failed to create L2CAP info file"); | |
1da177e4 LT |
2342 | |
2343 | BT_INFO("L2CAP ver %s", VERSION); | |
2344 | BT_INFO("L2CAP socket layer initialized"); | |
2345 | ||
2346 | return 0; | |
2347 | ||
2348 | error: | |
2349 | proto_unregister(&l2cap_proto); | |
2350 | return err; | |
2351 | } | |
2352 | ||
2353 | static void __exit l2cap_exit(void) | |
2354 | { | |
a91f2e39 | 2355 | class_remove_file(bt_class, &class_attr_l2cap); |
1da177e4 LT |
2356 | |
2357 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
2358 | BT_ERR("L2CAP socket unregistration failed"); | |
2359 | ||
2360 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
2361 | BT_ERR("L2CAP protocol unregistration failed"); | |
2362 | ||
2363 | proto_unregister(&l2cap_proto); | |
2364 | } | |
2365 | ||
2366 | void l2cap_load(void) | |
2367 | { | |
2368 | /* Dummy function to trigger automatic L2CAP module loading by | |
2369 | * other modules that use L2CAP sockets but don't use any other | |
2370 | * symbols from it. */ | |
2371 | return; | |
2372 | } | |
2373 | EXPORT_SYMBOL(l2cap_load); | |
2374 | ||
2375 | module_init(l2cap_init); | |
2376 | module_exit(l2cap_exit); | |
2377 | ||
2378 | MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>"); | |
2379 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); | |
2380 | MODULE_VERSION(VERSION); | |
2381 | MODULE_LICENSE("GPL"); | |
2382 | MODULE_ALIAS("bt-proto-0"); |