Commit | Line | Data |
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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 | ||
09ab6f4c | 53 | #define VERSION "2.11" |
f0709e03 MH |
54 | |
55 | static u32 l2cap_feat_mask = 0x0000; | |
1da177e4 | 56 | |
90ddc4f0 | 57 | static const struct proto_ops l2cap_sock_ops; |
1da177e4 LT |
58 | |
59 | static struct bt_sock_list l2cap_sk_list = { | |
d5fb2962 | 60 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
1da177e4 LT |
61 | }; |
62 | ||
1da177e4 LT |
63 | static void __l2cap_sock_close(struct sock *sk, int reason); |
64 | static void l2cap_sock_close(struct sock *sk); | |
65 | static void l2cap_sock_kill(struct sock *sk); | |
66 | ||
67 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
68 | u8 code, u8 ident, u16 dlen, void *data); | |
69 | ||
70 | /* ---- L2CAP timers ---- */ | |
71 | static void l2cap_sock_timeout(unsigned long arg) | |
72 | { | |
73 | struct sock *sk = (struct sock *) arg; | |
b1235d79 | 74 | int reason; |
1da177e4 LT |
75 | |
76 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
77 | ||
78 | bh_lock_sock(sk); | |
b1235d79 MH |
79 | |
80 | if (sk->sk_state == BT_CONNECT && | |
81 | (l2cap_pi(sk)->link_mode & (L2CAP_LM_AUTH | | |
82 | L2CAP_LM_ENCRYPT | L2CAP_LM_SECURE))) | |
83 | reason = ECONNREFUSED; | |
84 | else | |
85 | reason = ETIMEDOUT; | |
86 | ||
87 | __l2cap_sock_close(sk, reason); | |
88 | ||
1da177e4 LT |
89 | bh_unlock_sock(sk); |
90 | ||
91 | l2cap_sock_kill(sk); | |
92 | sock_put(sk); | |
93 | } | |
94 | ||
95 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
96 | { | |
97 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
98 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
99 | } | |
100 | ||
101 | static void l2cap_sock_clear_timer(struct sock *sk) | |
102 | { | |
103 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
104 | sk_stop_timer(sk, &sk->sk_timer); | |
105 | } | |
106 | ||
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 | ||
b1235d79 | 248 | sk->sk_state = BT_CLOSED; |
0139418c MH |
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 | ||
79d554a6 MH |
261 | /* Service level security */ |
262 | static inline int l2cap_check_link_mode(struct sock *sk) | |
263 | { | |
264 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
265 | ||
266 | if ((l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) || | |
267 | (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) | |
268 | return hci_conn_encrypt(conn->hcon); | |
269 | ||
270 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_AUTH) | |
271 | return hci_conn_auth(conn->hcon); | |
272 | ||
273 | return 1; | |
274 | } | |
275 | ||
4e8402a3 MH |
276 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
277 | { | |
278 | u8 id; | |
279 | ||
280 | /* Get next available identificator. | |
281 | * 1 - 128 are used by kernel. | |
282 | * 129 - 199 are reserved. | |
283 | * 200 - 254 are used by utilities like l2ping, etc. | |
284 | */ | |
285 | ||
286 | spin_lock_bh(&conn->lock); | |
287 | ||
288 | if (++conn->tx_ident > 128) | |
289 | conn->tx_ident = 1; | |
290 | ||
291 | id = conn->tx_ident; | |
292 | ||
293 | spin_unlock_bh(&conn->lock); | |
294 | ||
295 | return id; | |
296 | } | |
297 | ||
298 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) | |
299 | { | |
300 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
301 | ||
302 | BT_DBG("code 0x%2.2x", code); | |
303 | ||
304 | if (!skb) | |
305 | return -ENOMEM; | |
306 | ||
307 | return hci_send_acl(conn->hcon, skb, 0); | |
308 | } | |
309 | ||
79d554a6 MH |
310 | static void l2cap_do_start(struct sock *sk) |
311 | { | |
312 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
313 | ||
314 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
b1235d79 MH |
315 | if (l2cap_check_link_mode(sk)) { |
316 | struct l2cap_conn_req req; | |
317 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
318 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 319 | |
b1235d79 | 320 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 321 | |
b1235d79 | 322 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 323 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 324 | } |
79d554a6 MH |
325 | } else { |
326 | struct l2cap_info_req req; | |
327 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
328 | ||
329 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
330 | conn->info_ident = l2cap_get_ident(conn); | |
331 | ||
332 | mod_timer(&conn->info_timer, jiffies + | |
333 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
334 | ||
335 | l2cap_send_cmd(conn, conn->info_ident, | |
336 | L2CAP_INFO_REQ, sizeof(req), &req); | |
337 | } | |
338 | } | |
339 | ||
1da177e4 | 340 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
341 | static void l2cap_conn_start(struct l2cap_conn *conn) |
342 | { | |
343 | struct l2cap_chan_list *l = &conn->chan_list; | |
344 | struct sock *sk; | |
345 | ||
346 | BT_DBG("conn %p", conn); | |
347 | ||
348 | read_lock(&l->lock); | |
349 | ||
350 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
351 | bh_lock_sock(sk); | |
352 | ||
353 | if (sk->sk_type != SOCK_SEQPACKET) { | |
79d554a6 MH |
354 | bh_unlock_sock(sk); |
355 | continue; | |
356 | } | |
357 | ||
358 | if (sk->sk_state == BT_CONNECT) { | |
b1235d79 MH |
359 | if (l2cap_check_link_mode(sk)) { |
360 | struct l2cap_conn_req req; | |
361 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
362 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 363 | |
b1235d79 | 364 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 365 | |
b1235d79 | 366 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4e8402a3 | 367 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 368 | } |
79d554a6 MH |
369 | } else if (sk->sk_state == BT_CONNECT2) { |
370 | struct l2cap_conn_rsp rsp; | |
371 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
372 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
373 | ||
374 | if (l2cap_check_link_mode(sk)) { | |
f66dc81f MH |
375 | if (bt_sk(sk)->defer_setup) { |
376 | struct sock *parent = bt_sk(sk)->parent; | |
377 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
378 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
379 | parent->sk_data_ready(parent, 0); | |
380 | ||
381 | } else { | |
382 | sk->sk_state = BT_CONFIG; | |
383 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
384 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
385 | } | |
79d554a6 MH |
386 | } else { |
387 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
388 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
389 | } | |
390 | ||
391 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
392 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4e8402a3 MH |
393 | } |
394 | ||
395 | bh_unlock_sock(sk); | |
396 | } | |
397 | ||
398 | read_unlock(&l->lock); | |
399 | } | |
400 | ||
401 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
402 | { | |
79d554a6 MH |
403 | struct l2cap_chan_list *l = &conn->chan_list; |
404 | struct sock *sk; | |
4e8402a3 | 405 | |
79d554a6 | 406 | BT_DBG("conn %p", conn); |
4e8402a3 | 407 | |
79d554a6 | 408 | read_lock(&l->lock); |
4e8402a3 | 409 | |
79d554a6 MH |
410 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
411 | bh_lock_sock(sk); | |
4e8402a3 | 412 | |
79d554a6 MH |
413 | if (sk->sk_type != SOCK_SEQPACKET) { |
414 | l2cap_sock_clear_timer(sk); | |
415 | sk->sk_state = BT_CONNECTED; | |
416 | sk->sk_state_change(sk); | |
417 | } else if (sk->sk_state == BT_CONNECT) | |
418 | l2cap_do_start(sk); | |
4e8402a3 | 419 | |
79d554a6 | 420 | bh_unlock_sock(sk); |
4e8402a3 | 421 | } |
79d554a6 MH |
422 | |
423 | read_unlock(&l->lock); | |
4e8402a3 MH |
424 | } |
425 | ||
426 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
427 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
428 | { | |
429 | struct l2cap_chan_list *l = &conn->chan_list; | |
430 | struct sock *sk; | |
431 | ||
432 | BT_DBG("conn %p", conn); | |
433 | ||
434 | read_lock(&l->lock); | |
435 | ||
436 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
437 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_RELIABLE) | |
438 | sk->sk_err = err; | |
439 | } | |
440 | ||
441 | read_unlock(&l->lock); | |
442 | } | |
443 | ||
444 | static void l2cap_info_timeout(unsigned long arg) | |
445 | { | |
446 | struct l2cap_conn *conn = (void *) arg; | |
447 | ||
448 | conn->info_ident = 0; | |
449 | ||
450 | l2cap_conn_start(conn); | |
451 | } | |
452 | ||
1da177e4 LT |
453 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
454 | { | |
0139418c | 455 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 456 | |
0139418c | 457 | if (conn || status) |
1da177e4 LT |
458 | return conn; |
459 | ||
0139418c MH |
460 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
461 | if (!conn) | |
1da177e4 | 462 | return NULL; |
1da177e4 LT |
463 | |
464 | hcon->l2cap_data = conn; | |
465 | conn->hcon = hcon; | |
466 | ||
0139418c MH |
467 | BT_DBG("hcon %p conn %p", hcon, conn); |
468 | ||
1da177e4 LT |
469 | conn->mtu = hcon->hdev->acl_mtu; |
470 | conn->src = &hcon->hdev->bdaddr; | |
471 | conn->dst = &hcon->dst; | |
472 | ||
4e8402a3 MH |
473 | conn->feat_mask = 0; |
474 | ||
b1235d79 MH |
475 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
476 | (unsigned long) conn); | |
4e8402a3 | 477 | |
1da177e4 LT |
478 | spin_lock_init(&conn->lock); |
479 | rwlock_init(&conn->chan_list.lock); | |
480 | ||
1da177e4 LT |
481 | return conn; |
482 | } | |
483 | ||
0139418c | 484 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 485 | { |
0139418c | 486 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
487 | struct sock *sk; |
488 | ||
0139418c MH |
489 | if (!conn) |
490 | return; | |
1da177e4 LT |
491 | |
492 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
493 | ||
494 | if (conn->rx_skb) | |
495 | kfree_skb(conn->rx_skb); | |
496 | ||
497 | /* Kill channels */ | |
498 | while ((sk = conn->chan_list.head)) { | |
499 | bh_lock_sock(sk); | |
500 | l2cap_chan_del(sk, err); | |
501 | bh_unlock_sock(sk); | |
502 | l2cap_sock_kill(sk); | |
503 | } | |
504 | ||
8e8440f5 DY |
505 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
506 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 507 | |
1da177e4 LT |
508 | hcon->l2cap_data = NULL; |
509 | kfree(conn); | |
1da177e4 LT |
510 | } |
511 | ||
512 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
513 | { | |
514 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 515 | write_lock_bh(&l->lock); |
1da177e4 | 516 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 517 | write_unlock_bh(&l->lock); |
1da177e4 LT |
518 | } |
519 | ||
1da177e4 | 520 | /* ---- Socket interface ---- */ |
8e036fc3 | 521 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
522 | { |
523 | struct sock *sk; | |
524 | struct hlist_node *node; | |
525 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
526 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
527 | goto found; | |
528 | sk = NULL; | |
529 | found: | |
530 | return sk; | |
531 | } | |
532 | ||
533 | /* Find socket with psm and source bdaddr. | |
534 | * Returns closest match. | |
535 | */ | |
8e036fc3 | 536 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
537 | { |
538 | struct sock *sk = NULL, *sk1 = NULL; | |
539 | struct hlist_node *node; | |
540 | ||
541 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
542 | if (state && sk->sk_state != state) | |
543 | continue; | |
544 | ||
545 | if (l2cap_pi(sk)->psm == psm) { | |
546 | /* Exact match. */ | |
547 | if (!bacmp(&bt_sk(sk)->src, src)) | |
548 | break; | |
549 | ||
550 | /* Closest match */ | |
551 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
552 | sk1 = sk; | |
553 | } | |
554 | } | |
555 | return node ? sk : sk1; | |
556 | } | |
557 | ||
558 | /* Find socket with given address (psm, src). | |
559 | * Returns locked socket */ | |
8e036fc3 | 560 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
561 | { |
562 | struct sock *s; | |
563 | read_lock(&l2cap_sk_list.lock); | |
564 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
565 | if (s) bh_lock_sock(s); | |
566 | read_unlock(&l2cap_sk_list.lock); | |
567 | return s; | |
568 | } | |
569 | ||
570 | static void l2cap_sock_destruct(struct sock *sk) | |
571 | { | |
572 | BT_DBG("sk %p", sk); | |
573 | ||
574 | skb_queue_purge(&sk->sk_receive_queue); | |
575 | skb_queue_purge(&sk->sk_write_queue); | |
576 | } | |
577 | ||
578 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
579 | { | |
580 | struct sock *sk; | |
581 | ||
582 | BT_DBG("parent %p", parent); | |
583 | ||
584 | /* Close not yet accepted channels */ | |
585 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
586 | l2cap_sock_close(sk); | |
587 | ||
b1235d79 | 588 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
589 | sock_set_flag(parent, SOCK_ZAPPED); |
590 | } | |
591 | ||
592 | /* Kill socket (only if zapped and orphan) | |
593 | * Must be called on unlocked socket. | |
594 | */ | |
595 | static void l2cap_sock_kill(struct sock *sk) | |
596 | { | |
597 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
598 | return; | |
599 | ||
600 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
601 | ||
602 | /* Kill poor orphan */ | |
603 | bt_sock_unlink(&l2cap_sk_list, sk); | |
604 | sock_set_flag(sk, SOCK_DEAD); | |
605 | sock_put(sk); | |
606 | } | |
607 | ||
608 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
609 | { | |
610 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
611 | ||
612 | switch (sk->sk_state) { | |
613 | case BT_LISTEN: | |
614 | l2cap_sock_cleanup_listen(sk); | |
615 | break; | |
616 | ||
617 | case BT_CONNECTED: | |
618 | case BT_CONFIG: | |
1da177e4 LT |
619 | if (sk->sk_type == SOCK_SEQPACKET) { |
620 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
621 | struct l2cap_disconn_req req; | |
622 | ||
623 | sk->sk_state = BT_DISCONN; | |
624 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
625 | ||
aca3192c YH |
626 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
627 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
628 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
629 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
b1235d79 | 630 | } else |
1da177e4 | 631 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
632 | break; |
633 | ||
f66dc81f MH |
634 | case BT_CONNECT2: |
635 | if (sk->sk_type == SOCK_SEQPACKET) { | |
636 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
637 | struct l2cap_conn_rsp rsp; | |
638 | __u16 result; | |
639 | ||
640 | if (bt_sk(sk)->defer_setup) | |
641 | result = L2CAP_CR_SEC_BLOCK; | |
642 | else | |
643 | result = L2CAP_CR_BAD_PSM; | |
644 | ||
645 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
646 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
647 | rsp.result = cpu_to_le16(result); | |
648 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
649 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
650 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
651 | } else | |
652 | l2cap_chan_del(sk, reason); | |
653 | break; | |
654 | ||
1da177e4 LT |
655 | case BT_CONNECT: |
656 | case BT_DISCONN: | |
657 | l2cap_chan_del(sk, reason); | |
658 | break; | |
659 | ||
660 | default: | |
661 | sock_set_flag(sk, SOCK_ZAPPED); | |
662 | break; | |
663 | } | |
664 | } | |
665 | ||
666 | /* Must be called on unlocked socket. */ | |
667 | static void l2cap_sock_close(struct sock *sk) | |
668 | { | |
669 | l2cap_sock_clear_timer(sk); | |
670 | lock_sock(sk); | |
671 | __l2cap_sock_close(sk, ECONNRESET); | |
672 | release_sock(sk); | |
673 | l2cap_sock_kill(sk); | |
674 | } | |
675 | ||
676 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
677 | { | |
678 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
679 | ||
680 | BT_DBG("sk %p", sk); | |
681 | ||
682 | if (parent) { | |
683 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
684 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
685 | ||
1da177e4 LT |
686 | pi->imtu = l2cap_pi(parent)->imtu; |
687 | pi->omtu = l2cap_pi(parent)->omtu; | |
688 | pi->link_mode = l2cap_pi(parent)->link_mode; | |
689 | } else { | |
690 | pi->imtu = L2CAP_DEFAULT_MTU; | |
691 | pi->omtu = 0; | |
692 | pi->link_mode = 0; | |
693 | } | |
694 | ||
695 | /* Default config options */ | |
5dee9e7c | 696 | pi->conf_len = 0; |
1da177e4 LT |
697 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
698 | } | |
699 | ||
700 | static struct proto l2cap_proto = { | |
701 | .name = "L2CAP", | |
702 | .owner = THIS_MODULE, | |
703 | .obj_size = sizeof(struct l2cap_pinfo) | |
704 | }; | |
705 | ||
1b8d7ae4 | 706 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
707 | { |
708 | struct sock *sk; | |
709 | ||
6257ff21 | 710 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
711 | if (!sk) |
712 | return NULL; | |
713 | ||
714 | sock_init_data(sock, sk); | |
715 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
716 | ||
717 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 718 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
719 | |
720 | sock_reset_flag(sk, SOCK_ZAPPED); | |
721 | ||
722 | sk->sk_protocol = proto; | |
b1235d79 | 723 | sk->sk_state = BT_OPEN; |
1da177e4 | 724 | |
b1235d79 | 725 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
726 | |
727 | bt_sock_link(&l2cap_sk_list, sk); | |
728 | return sk; | |
729 | } | |
730 | ||
1b8d7ae4 | 731 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
732 | { |
733 | struct sock *sk; | |
734 | ||
735 | BT_DBG("sock %p", sock); | |
736 | ||
737 | sock->state = SS_UNCONNECTED; | |
738 | ||
739 | if (sock->type != SOCK_SEQPACKET && | |
740 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
741 | return -ESOCKTNOSUPPORT; | |
742 | ||
743 | if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW)) | |
744 | return -EPERM; | |
745 | ||
746 | sock->ops = &l2cap_sock_ops; | |
747 | ||
1b8d7ae4 | 748 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
749 | if (!sk) |
750 | return -ENOMEM; | |
751 | ||
752 | l2cap_sock_init(sk, NULL); | |
753 | return 0; | |
754 | } | |
755 | ||
756 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
757 | { | |
758 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
759 | struct sock *sk = sock->sk; | |
760 | int err = 0; | |
761 | ||
762 | BT_DBG("sk %p, %s %d", sk, batostr(&la->l2_bdaddr), la->l2_psm); | |
763 | ||
764 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
765 | return -EINVAL; | |
766 | ||
767 | lock_sock(sk); | |
768 | ||
769 | if (sk->sk_state != BT_OPEN) { | |
770 | err = -EBADFD; | |
771 | goto done; | |
772 | } | |
773 | ||
8e036fc3 | 774 | if (la->l2_psm && btohs(la->l2_psm) < 0x1001 && |
847641d7 MH |
775 | !capable(CAP_NET_BIND_SERVICE)) { |
776 | err = -EACCES; | |
777 | goto done; | |
778 | } | |
8e87d142 | 779 | |
1da177e4 LT |
780 | write_lock_bh(&l2cap_sk_list.lock); |
781 | ||
782 | if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) { | |
783 | err = -EADDRINUSE; | |
784 | } else { | |
785 | /* Save source address */ | |
786 | bacpy(&bt_sk(sk)->src, &la->l2_bdaddr); | |
787 | l2cap_pi(sk)->psm = la->l2_psm; | |
788 | l2cap_pi(sk)->sport = la->l2_psm; | |
789 | sk->sk_state = BT_BOUND; | |
790 | } | |
791 | ||
792 | write_unlock_bh(&l2cap_sk_list.lock); | |
793 | ||
794 | done: | |
795 | release_sock(sk); | |
796 | return err; | |
797 | } | |
798 | ||
799 | static int l2cap_do_connect(struct sock *sk) | |
800 | { | |
801 | bdaddr_t *src = &bt_sk(sk)->src; | |
802 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
803 | struct l2cap_conn *conn; | |
804 | struct hci_conn *hcon; | |
805 | struct hci_dev *hdev; | |
09ab6f4c | 806 | __u8 auth_type; |
1da177e4 LT |
807 | int err = 0; |
808 | ||
809 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), l2cap_pi(sk)->psm); | |
810 | ||
811 | if (!(hdev = hci_get_route(dst, src))) | |
812 | return -EHOSTUNREACH; | |
813 | ||
814 | hci_dev_lock_bh(hdev); | |
815 | ||
816 | err = -ENOMEM; | |
817 | ||
09ab6f4c MH |
818 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_AUTH || |
819 | l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT || | |
820 | l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE) { | |
821 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) | |
822 | auth_type = HCI_AT_NO_BONDING_MITM; | |
823 | else | |
824 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
825 | } else { | |
826 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) | |
827 | auth_type = HCI_AT_NO_BONDING; | |
828 | else | |
829 | auth_type = HCI_AT_GENERAL_BONDING; | |
830 | } | |
831 | ||
832 | hcon = hci_connect(hdev, ACL_LINK, dst, auth_type); | |
1da177e4 LT |
833 | if (!hcon) |
834 | goto done; | |
835 | ||
836 | conn = l2cap_conn_add(hcon, 0); | |
837 | if (!conn) { | |
838 | hci_conn_put(hcon); | |
839 | goto done; | |
840 | } | |
841 | ||
842 | err = 0; | |
843 | ||
844 | /* Update source addr of the socket */ | |
845 | bacpy(src, conn->src); | |
846 | ||
847 | l2cap_chan_add(conn, sk, NULL); | |
848 | ||
849 | sk->sk_state = BT_CONNECT; | |
850 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
851 | ||
852 | if (hcon->state == BT_CONNECTED) { | |
79d554a6 | 853 | if (sk->sk_type != SOCK_SEQPACKET) { |
1da177e4 LT |
854 | l2cap_sock_clear_timer(sk); |
855 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
856 | } else |
857 | l2cap_do_start(sk); | |
1da177e4 LT |
858 | } |
859 | ||
860 | done: | |
861 | hci_dev_unlock_bh(hdev); | |
862 | hci_dev_put(hdev); | |
863 | return err; | |
864 | } | |
865 | ||
866 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
867 | { | |
868 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
869 | struct sock *sk = sock->sk; | |
870 | int err = 0; | |
871 | ||
872 | lock_sock(sk); | |
873 | ||
874 | BT_DBG("sk %p", sk); | |
875 | ||
876 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_l2)) { | |
877 | err = -EINVAL; | |
878 | goto done; | |
879 | } | |
880 | ||
881 | if (sk->sk_type == SOCK_SEQPACKET && !la->l2_psm) { | |
882 | err = -EINVAL; | |
883 | goto done; | |
884 | } | |
885 | ||
886 | switch(sk->sk_state) { | |
887 | case BT_CONNECT: | |
888 | case BT_CONNECT2: | |
889 | case BT_CONFIG: | |
890 | /* Already connecting */ | |
891 | goto wait; | |
892 | ||
893 | case BT_CONNECTED: | |
894 | /* Already connected */ | |
895 | goto done; | |
896 | ||
897 | case BT_OPEN: | |
898 | case BT_BOUND: | |
899 | /* Can connect */ | |
900 | break; | |
901 | ||
902 | default: | |
903 | err = -EBADFD; | |
904 | goto done; | |
905 | } | |
906 | ||
907 | /* Set destination address and psm */ | |
908 | bacpy(&bt_sk(sk)->dst, &la->l2_bdaddr); | |
909 | l2cap_pi(sk)->psm = la->l2_psm; | |
910 | ||
911 | if ((err = l2cap_do_connect(sk))) | |
912 | goto done; | |
913 | ||
914 | wait: | |
915 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
916 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
917 | done: | |
918 | release_sock(sk); | |
919 | return err; | |
920 | } | |
921 | ||
922 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
923 | { | |
924 | struct sock *sk = sock->sk; | |
925 | int err = 0; | |
926 | ||
927 | BT_DBG("sk %p backlog %d", sk, backlog); | |
928 | ||
929 | lock_sock(sk); | |
930 | ||
931 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
932 | err = -EBADFD; | |
933 | goto done; | |
934 | } | |
935 | ||
936 | if (!l2cap_pi(sk)->psm) { | |
937 | bdaddr_t *src = &bt_sk(sk)->src; | |
938 | u16 psm; | |
939 | ||
940 | err = -EINVAL; | |
941 | ||
942 | write_lock_bh(&l2cap_sk_list.lock); | |
943 | ||
944 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
6dc0c208 | 945 | if (!__l2cap_get_sock_by_addr(htobs(psm), src)) { |
1da177e4 LT |
946 | l2cap_pi(sk)->psm = htobs(psm); |
947 | l2cap_pi(sk)->sport = htobs(psm); | |
948 | err = 0; | |
949 | break; | |
950 | } | |
951 | ||
952 | write_unlock_bh(&l2cap_sk_list.lock); | |
953 | ||
954 | if (err < 0) | |
955 | goto done; | |
956 | } | |
957 | ||
958 | sk->sk_max_ack_backlog = backlog; | |
959 | sk->sk_ack_backlog = 0; | |
960 | sk->sk_state = BT_LISTEN; | |
961 | ||
962 | done: | |
963 | release_sock(sk); | |
964 | return err; | |
965 | } | |
966 | ||
967 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
968 | { | |
969 | DECLARE_WAITQUEUE(wait, current); | |
970 | struct sock *sk = sock->sk, *nsk; | |
971 | long timeo; | |
972 | int err = 0; | |
973 | ||
fcc70d5f | 974 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
975 | |
976 | if (sk->sk_state != BT_LISTEN) { | |
977 | err = -EBADFD; | |
978 | goto done; | |
979 | } | |
980 | ||
981 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
982 | ||
983 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
984 | ||
985 | /* Wait for an incoming connection. (wake-one). */ | |
986 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
987 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
988 | set_current_state(TASK_INTERRUPTIBLE); | |
989 | if (!timeo) { | |
990 | err = -EAGAIN; | |
991 | break; | |
992 | } | |
993 | ||
994 | release_sock(sk); | |
995 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 996 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
997 | |
998 | if (sk->sk_state != BT_LISTEN) { | |
999 | err = -EBADFD; | |
1000 | break; | |
1001 | } | |
1002 | ||
1003 | if (signal_pending(current)) { | |
1004 | err = sock_intr_errno(timeo); | |
1005 | break; | |
1006 | } | |
1007 | } | |
1008 | set_current_state(TASK_RUNNING); | |
1009 | remove_wait_queue(sk->sk_sleep, &wait); | |
1010 | ||
1011 | if (err) | |
1012 | goto done; | |
1013 | ||
1014 | newsock->state = SS_CONNECTED; | |
1015 | ||
1016 | BT_DBG("new socket %p", nsk); | |
1017 | ||
1018 | done: | |
1019 | release_sock(sk); | |
1020 | return err; | |
1021 | } | |
1022 | ||
1023 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1024 | { | |
1025 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1026 | struct sock *sk = sock->sk; | |
1027 | ||
1028 | BT_DBG("sock %p, sk %p", sock, sk); | |
1029 | ||
1030 | addr->sa_family = AF_BLUETOOTH; | |
1031 | *len = sizeof(struct sockaddr_l2); | |
1032 | ||
1033 | if (peer) | |
1034 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); | |
1035 | else | |
1036 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); | |
1037 | ||
1038 | la->l2_psm = l2cap_pi(sk)->psm; | |
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len) | |
1043 | { | |
1044 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1045 | struct sk_buff *skb, **frag; | |
1046 | int err, hlen, count, sent=0; | |
1047 | struct l2cap_hdr *lh; | |
1048 | ||
1049 | BT_DBG("sk %p len %d", sk, len); | |
1050 | ||
1051 | /* First fragment (with L2CAP header) */ | |
1052 | if (sk->sk_type == SOCK_DGRAM) | |
1053 | hlen = L2CAP_HDR_SIZE + 2; | |
1054 | else | |
1055 | hlen = L2CAP_HDR_SIZE; | |
1056 | ||
1057 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1058 | ||
1059 | skb = bt_skb_send_alloc(sk, hlen + count, | |
1060 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1061 | if (!skb) | |
1062 | return err; | |
1063 | ||
1064 | /* Create L2CAP header */ | |
1065 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
1066 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
1067 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1da177e4 LT |
1068 | |
1069 | if (sk->sk_type == SOCK_DGRAM) | |
8e036fc3 | 1070 | put_unaligned(l2cap_pi(sk)->psm, (__le16 *) skb_put(skb, 2)); |
1da177e4 LT |
1071 | |
1072 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
1073 | err = -EFAULT; | |
1074 | goto fail; | |
1075 | } | |
1076 | ||
1077 | sent += count; | |
1078 | len -= count; | |
1079 | ||
1080 | /* Continuation fragments (no L2CAP header) */ | |
1081 | frag = &skb_shinfo(skb)->frag_list; | |
1082 | while (len) { | |
1083 | count = min_t(unsigned int, conn->mtu, len); | |
1084 | ||
1085 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1086 | if (!*frag) | |
1087 | goto fail; | |
8e87d142 | 1088 | |
1da177e4 LT |
1089 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) { |
1090 | err = -EFAULT; | |
1091 | goto fail; | |
1092 | } | |
1093 | ||
1094 | sent += count; | |
1095 | len -= count; | |
1096 | ||
1097 | frag = &(*frag)->next; | |
1098 | } | |
1099 | ||
1100 | if ((err = hci_send_acl(conn->hcon, skb, 0)) < 0) | |
1101 | goto fail; | |
1102 | ||
1103 | return sent; | |
1104 | ||
1105 | fail: | |
1106 | kfree_skb(skb); | |
1107 | return err; | |
1108 | } | |
1109 | ||
1110 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
1111 | { | |
1112 | struct sock *sk = sock->sk; | |
1113 | int err = 0; | |
1114 | ||
1115 | BT_DBG("sock %p, sk %p", sock, sk); | |
1116 | ||
c1cbe4b7 BL |
1117 | err = sock_error(sk); |
1118 | if (err) | |
1119 | return err; | |
1da177e4 LT |
1120 | |
1121 | if (msg->msg_flags & MSG_OOB) | |
1122 | return -EOPNOTSUPP; | |
1123 | ||
1124 | /* Check outgoing MTU */ | |
1125 | if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu) | |
1126 | return -EINVAL; | |
1127 | ||
1128 | lock_sock(sk); | |
1129 | ||
1130 | if (sk->sk_state == BT_CONNECTED) | |
1131 | err = l2cap_do_send(sk, msg, len); | |
1132 | else | |
1133 | err = -ENOTCONN; | |
1134 | ||
1135 | release_sock(sk); | |
1136 | return err; | |
1137 | } | |
1138 | ||
f66dc81f MH |
1139 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1140 | { | |
1141 | struct sock *sk = sock->sk; | |
1142 | ||
1143 | lock_sock(sk); | |
1144 | ||
1145 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1146 | struct l2cap_conn_rsp rsp; | |
1147 | ||
1148 | sk->sk_state = BT_CONFIG; | |
1149 | ||
1150 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1151 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1152 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1153 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1154 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1155 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1156 | ||
1157 | release_sock(sk); | |
1158 | return 0; | |
1159 | } | |
1160 | ||
1161 | release_sock(sk); | |
1162 | ||
1163 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1164 | } | |
1165 | ||
d58daf42 | 1166 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen) |
1da177e4 LT |
1167 | { |
1168 | struct sock *sk = sock->sk; | |
1169 | struct l2cap_options opts; | |
1170 | int err = 0, len; | |
1171 | u32 opt; | |
1172 | ||
1173 | BT_DBG("sk %p", sk); | |
1174 | ||
1175 | lock_sock(sk); | |
1176 | ||
1177 | switch (optname) { | |
1178 | case L2CAP_OPTIONS: | |
0878b666 MH |
1179 | opts.imtu = l2cap_pi(sk)->imtu; |
1180 | opts.omtu = l2cap_pi(sk)->omtu; | |
1181 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
6464f35f | 1182 | opts.mode = L2CAP_MODE_BASIC; |
0878b666 | 1183 | |
1da177e4 LT |
1184 | len = min_t(unsigned int, sizeof(opts), optlen); |
1185 | if (copy_from_user((char *) &opts, optval, len)) { | |
1186 | err = -EFAULT; | |
1187 | break; | |
1188 | } | |
0878b666 | 1189 | |
1da177e4 LT |
1190 | l2cap_pi(sk)->imtu = opts.imtu; |
1191 | l2cap_pi(sk)->omtu = opts.omtu; | |
1192 | break; | |
1193 | ||
1194 | case L2CAP_LM: | |
1195 | if (get_user(opt, (u32 __user *) optval)) { | |
1196 | err = -EFAULT; | |
1197 | break; | |
1198 | } | |
1199 | ||
1200 | l2cap_pi(sk)->link_mode = opt; | |
1201 | break; | |
1202 | ||
1203 | default: | |
1204 | err = -ENOPROTOOPT; | |
1205 | break; | |
1206 | } | |
1207 | ||
1208 | release_sock(sk); | |
1209 | return err; | |
1210 | } | |
1211 | ||
d58daf42 MH |
1212 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) |
1213 | { | |
1214 | struct sock *sk = sock->sk; | |
1215 | int err = 0; | |
f66dc81f | 1216 | u32 opt; |
d58daf42 MH |
1217 | |
1218 | BT_DBG("sk %p", sk); | |
1219 | ||
1220 | if (level == SOL_L2CAP) | |
1221 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
1222 | ||
1223 | lock_sock(sk); | |
1224 | ||
1225 | switch (optname) { | |
f66dc81f MH |
1226 | case BT_DEFER_SETUP: |
1227 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1228 | err = -EINVAL; | |
1229 | break; | |
1230 | } | |
1231 | ||
1232 | if (get_user(opt, (u32 __user *) optval)) { | |
1233 | err = -EFAULT; | |
1234 | break; | |
1235 | } | |
1236 | ||
1237 | bt_sk(sk)->defer_setup = opt; | |
1238 | break; | |
1239 | ||
d58daf42 MH |
1240 | default: |
1241 | err = -ENOPROTOOPT; | |
1242 | break; | |
1243 | } | |
1244 | ||
1245 | release_sock(sk); | |
1246 | return err; | |
1247 | } | |
1248 | ||
1249 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
1250 | { |
1251 | struct sock *sk = sock->sk; | |
1252 | struct l2cap_options opts; | |
1253 | struct l2cap_conninfo cinfo; | |
1254 | int len, err = 0; | |
1255 | ||
1256 | BT_DBG("sk %p", sk); | |
1257 | ||
1258 | if (get_user(len, optlen)) | |
1259 | return -EFAULT; | |
1260 | ||
1261 | lock_sock(sk); | |
1262 | ||
1263 | switch (optname) { | |
1264 | case L2CAP_OPTIONS: | |
1265 | opts.imtu = l2cap_pi(sk)->imtu; | |
1266 | opts.omtu = l2cap_pi(sk)->omtu; | |
1267 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
6464f35f | 1268 | opts.mode = L2CAP_MODE_BASIC; |
1da177e4 LT |
1269 | |
1270 | len = min_t(unsigned int, len, sizeof(opts)); | |
1271 | if (copy_to_user(optval, (char *) &opts, len)) | |
1272 | err = -EFAULT; | |
1273 | ||
1274 | break; | |
1275 | ||
1276 | case L2CAP_LM: | |
1277 | if (put_user(l2cap_pi(sk)->link_mode, (u32 __user *) optval)) | |
1278 | err = -EFAULT; | |
1279 | break; | |
1280 | ||
1281 | case L2CAP_CONNINFO: | |
f66dc81f MH |
1282 | if (sk->sk_state != BT_CONNECTED && |
1283 | !(sk->sk_state == BT_CONNECT2 && | |
1284 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
1285 | err = -ENOTCONN; |
1286 | break; | |
1287 | } | |
1288 | ||
1289 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
1290 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
1291 | ||
1292 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
1293 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
1294 | err = -EFAULT; | |
1295 | ||
1296 | break; | |
1297 | ||
1298 | default: | |
1299 | err = -ENOPROTOOPT; | |
1300 | break; | |
1301 | } | |
1302 | ||
1303 | release_sock(sk); | |
1304 | return err; | |
1305 | } | |
1306 | ||
d58daf42 MH |
1307 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
1308 | { | |
1309 | struct sock *sk = sock->sk; | |
1310 | int len, err = 0; | |
1311 | ||
1312 | BT_DBG("sk %p", sk); | |
1313 | ||
1314 | if (level == SOL_L2CAP) | |
1315 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
1316 | ||
1317 | if (get_user(len, optlen)) | |
1318 | return -EFAULT; | |
1319 | ||
1320 | lock_sock(sk); | |
1321 | ||
1322 | switch (optname) { | |
f66dc81f MH |
1323 | case BT_DEFER_SETUP: |
1324 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1325 | err = -EINVAL; | |
1326 | break; | |
1327 | } | |
1328 | ||
1329 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
1330 | err = -EFAULT; | |
1331 | ||
1332 | break; | |
1333 | ||
d58daf42 MH |
1334 | default: |
1335 | err = -ENOPROTOOPT; | |
1336 | break; | |
1337 | } | |
1338 | ||
1339 | release_sock(sk); | |
1340 | return err; | |
1341 | } | |
1342 | ||
1da177e4 LT |
1343 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1344 | { | |
1345 | struct sock *sk = sock->sk; | |
1346 | int err = 0; | |
1347 | ||
1348 | BT_DBG("sock %p, sk %p", sock, sk); | |
1349 | ||
1350 | if (!sk) | |
1351 | return 0; | |
1352 | ||
1353 | lock_sock(sk); | |
1354 | if (!sk->sk_shutdown) { | |
1355 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1356 | l2cap_sock_clear_timer(sk); | |
1357 | __l2cap_sock_close(sk, 0); | |
1358 | ||
1359 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
1360 | err = bt_sock_wait_state(sk, BT_CLOSED, |
1361 | sk->sk_lingertime); | |
1da177e4 LT |
1362 | } |
1363 | release_sock(sk); | |
1364 | return err; | |
1365 | } | |
1366 | ||
1367 | static int l2cap_sock_release(struct socket *sock) | |
1368 | { | |
1369 | struct sock *sk = sock->sk; | |
1370 | int err; | |
1371 | ||
1372 | BT_DBG("sock %p, sk %p", sock, sk); | |
1373 | ||
1374 | if (!sk) | |
1375 | return 0; | |
1376 | ||
1377 | err = l2cap_sock_shutdown(sock, 2); | |
1378 | ||
1379 | sock_orphan(sk); | |
1380 | l2cap_sock_kill(sk); | |
1381 | return err; | |
1382 | } | |
1383 | ||
1da177e4 LT |
1384 | static void l2cap_chan_ready(struct sock *sk) |
1385 | { | |
1386 | struct sock *parent = bt_sk(sk)->parent; | |
1387 | ||
1388 | BT_DBG("sk %p, parent %p", sk, parent); | |
1389 | ||
1390 | l2cap_pi(sk)->conf_state = 0; | |
1391 | l2cap_sock_clear_timer(sk); | |
1392 | ||
1393 | if (!parent) { | |
1394 | /* Outgoing channel. | |
1395 | * Wake up socket sleeping on connect. | |
1396 | */ | |
1397 | sk->sk_state = BT_CONNECTED; | |
1398 | sk->sk_state_change(sk); | |
1399 | } else { | |
1400 | /* Incoming channel. | |
1401 | * Wake up socket sleeping on accept. | |
1402 | */ | |
1403 | parent->sk_data_ready(parent, 0); | |
1404 | } | |
b1235d79 MH |
1405 | |
1406 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE) { | |
1407 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1408 | hci_conn_change_link_key(conn->hcon); | |
1409 | } | |
1da177e4 LT |
1410 | } |
1411 | ||
1412 | /* Copy frame to all raw sockets on that connection */ | |
1413 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
1414 | { | |
1415 | struct l2cap_chan_list *l = &conn->chan_list; | |
1416 | struct sk_buff *nskb; | |
1417 | struct sock * sk; | |
1418 | ||
1419 | BT_DBG("conn %p", conn); | |
1420 | ||
1421 | read_lock(&l->lock); | |
1422 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1423 | if (sk->sk_type != SOCK_RAW) | |
1424 | continue; | |
1425 | ||
1426 | /* Don't send frame to the socket it came from */ | |
1427 | if (skb->sk == sk) | |
1428 | continue; | |
1429 | ||
1430 | if (!(nskb = skb_clone(skb, GFP_ATOMIC))) | |
1431 | continue; | |
1432 | ||
1433 | if (sock_queue_rcv_skb(sk, nskb)) | |
1434 | kfree_skb(nskb); | |
1435 | } | |
1436 | read_unlock(&l->lock); | |
1437 | } | |
1438 | ||
1439 | /* ---- L2CAP signalling commands ---- */ | |
1440 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
1441 | u8 code, u8 ident, u16 dlen, void *data) | |
1442 | { | |
1443 | struct sk_buff *skb, **frag; | |
1444 | struct l2cap_cmd_hdr *cmd; | |
1445 | struct l2cap_hdr *lh; | |
1446 | int len, count; | |
1447 | ||
1448 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", conn, code, ident, dlen); | |
1449 | ||
1450 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
1451 | count = min_t(unsigned int, conn->mtu, len); | |
1452 | ||
1453 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
1454 | if (!skb) | |
1455 | return NULL; | |
1456 | ||
1457 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
1458 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
1459 | lh->cid = cpu_to_le16(0x0001); | |
1da177e4 LT |
1460 | |
1461 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
1462 | cmd->code = code; | |
1463 | cmd->ident = ident; | |
aca3192c | 1464 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
1465 | |
1466 | if (dlen) { | |
1467 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
1468 | memcpy(skb_put(skb, count), data, count); | |
1469 | data += count; | |
1470 | } | |
1471 | ||
1472 | len -= skb->len; | |
1473 | ||
1474 | /* Continuation fragments (no L2CAP header) */ | |
1475 | frag = &skb_shinfo(skb)->frag_list; | |
1476 | while (len) { | |
1477 | count = min_t(unsigned int, conn->mtu, len); | |
1478 | ||
1479 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
1480 | if (!*frag) | |
1481 | goto fail; | |
1482 | ||
1483 | memcpy(skb_put(*frag, count), data, count); | |
1484 | ||
1485 | len -= count; | |
1486 | data += count; | |
1487 | ||
1488 | frag = &(*frag)->next; | |
1489 | } | |
1490 | ||
1491 | return skb; | |
1492 | ||
1493 | fail: | |
1494 | kfree_skb(skb); | |
1495 | return NULL; | |
1496 | } | |
1497 | ||
1498 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
1499 | { | |
1500 | struct l2cap_conf_opt *opt = *ptr; | |
1501 | int len; | |
1502 | ||
1503 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
1504 | *ptr += len; | |
1505 | ||
1506 | *type = opt->type; | |
1507 | *olen = opt->len; | |
1508 | ||
1509 | switch (opt->len) { | |
1510 | case 1: | |
1511 | *val = *((u8 *) opt->val); | |
1512 | break; | |
1513 | ||
1514 | case 2: | |
861d6882 | 1515 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
1516 | break; |
1517 | ||
1518 | case 4: | |
861d6882 | 1519 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
1520 | break; |
1521 | ||
1522 | default: | |
1523 | *val = (unsigned long) opt->val; | |
1524 | break; | |
1525 | } | |
1526 | ||
1527 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
1528 | return len; | |
1529 | } | |
1530 | ||
1da177e4 LT |
1531 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
1532 | { | |
1533 | struct l2cap_conf_opt *opt = *ptr; | |
1534 | ||
1535 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
1536 | ||
1537 | opt->type = type; | |
1538 | opt->len = len; | |
1539 | ||
1540 | switch (len) { | |
1541 | case 1: | |
1542 | *((u8 *) opt->val) = val; | |
1543 | break; | |
1544 | ||
1545 | case 2: | |
8e036fc3 | 1546 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
1547 | break; |
1548 | ||
1549 | case 4: | |
8e036fc3 | 1550 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
1551 | break; |
1552 | ||
1553 | default: | |
1554 | memcpy(opt->val, (void *) val, len); | |
1555 | break; | |
1556 | } | |
1557 | ||
1558 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
1559 | } | |
1560 | ||
1561 | static int l2cap_build_conf_req(struct sock *sk, void *data) | |
1562 | { | |
1563 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1564 | struct l2cap_conf_req *req = data; | |
1565 | void *ptr = req->data; | |
1566 | ||
1567 | BT_DBG("sk %p", sk); | |
1568 | ||
1569 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
1570 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
1571 | ||
1572 | /* FIXME: Need actual value of the flush timeout */ | |
1573 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
1574 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
1575 | ||
aca3192c YH |
1576 | req->dcid = cpu_to_le16(pi->dcid); |
1577 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
1578 | |
1579 | return ptr - data; | |
1580 | } | |
1581 | ||
5dee9e7c | 1582 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
1583 | { |
1584 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
1585 | struct l2cap_conf_rsp *rsp = data; |
1586 | void *ptr = rsp->data; | |
1587 | void *req = pi->conf_req; | |
1588 | int len = pi->conf_len; | |
1589 | int type, hint, olen; | |
1590 | unsigned long val; | |
6464f35f | 1591 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 1592 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 1593 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 1594 | |
5dee9e7c | 1595 | BT_DBG("sk %p", sk); |
820ae1b8 | 1596 | |
5dee9e7c MH |
1597 | while (len >= L2CAP_CONF_OPT_SIZE) { |
1598 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 1599 | |
5dee9e7c MH |
1600 | hint = type & 0x80; |
1601 | type &= 0x7f; | |
1602 | ||
1603 | switch (type) { | |
1604 | case L2CAP_CONF_MTU: | |
861d6882 | 1605 | mtu = val; |
5dee9e7c MH |
1606 | break; |
1607 | ||
1608 | case L2CAP_CONF_FLUSH_TO: | |
1609 | pi->flush_to = val; | |
1610 | break; | |
1611 | ||
1612 | case L2CAP_CONF_QOS: | |
1613 | break; | |
1614 | ||
6464f35f MH |
1615 | case L2CAP_CONF_RFC: |
1616 | if (olen == sizeof(rfc)) | |
1617 | memcpy(&rfc, (void *) val, olen); | |
1618 | break; | |
1619 | ||
5dee9e7c MH |
1620 | default: |
1621 | if (hint) | |
1622 | break; | |
1623 | ||
1624 | result = L2CAP_CONF_UNKNOWN; | |
1625 | *((u8 *) ptr++) = type; | |
1626 | break; | |
1627 | } | |
1628 | } | |
1629 | ||
1630 | if (result == L2CAP_CONF_SUCCESS) { | |
1631 | /* Configure output options and let the other side know | |
1632 | * which ones we don't like. */ | |
1633 | ||
6464f35f MH |
1634 | if (rfc.mode == L2CAP_MODE_BASIC) { |
1635 | if (mtu < pi->omtu) | |
1636 | result = L2CAP_CONF_UNACCEPT; | |
1637 | else { | |
1638 | pi->omtu = mtu; | |
1639 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
1640 | } | |
1641 | ||
1642 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
1643 | } else { | |
5dee9e7c | 1644 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 1645 | |
6464f35f MH |
1646 | memset(&rfc, 0, sizeof(rfc)); |
1647 | rfc.mode = L2CAP_MODE_BASIC; | |
1648 | ||
1649 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
1650 | sizeof(rfc), (unsigned long) &rfc); | |
1651 | } | |
5dee9e7c MH |
1652 | } |
1653 | ||
1654 | rsp->scid = cpu_to_le16(pi->dcid); | |
1655 | rsp->result = cpu_to_le16(result); | |
1656 | rsp->flags = cpu_to_le16(0x0000); | |
1657 | ||
1658 | return ptr - data; | |
1da177e4 LT |
1659 | } |
1660 | ||
5dee9e7c | 1661 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
1662 | { |
1663 | struct l2cap_conf_rsp *rsp = data; | |
1664 | void *ptr = rsp->data; | |
1da177e4 | 1665 | |
5dee9e7c | 1666 | BT_DBG("sk %p", sk); |
1da177e4 | 1667 | |
aca3192c | 1668 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 1669 | rsp->result = cpu_to_le16(result); |
aca3192c | 1670 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
1671 | |
1672 | return ptr - data; | |
1673 | } | |
1674 | ||
4e8402a3 MH |
1675 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1676 | { | |
1677 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
1678 | ||
1679 | if (rej->reason != 0x0000) | |
1680 | return 0; | |
1681 | ||
1682 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
1683 | cmd->ident == conn->info_ident) { | |
1684 | conn->info_ident = 0; | |
1685 | del_timer(&conn->info_timer); | |
1686 | l2cap_conn_start(conn); | |
1687 | } | |
1688 | ||
1689 | return 0; | |
1690 | } | |
1691 | ||
1da177e4 LT |
1692 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1693 | { | |
1694 | struct l2cap_chan_list *list = &conn->chan_list; | |
1695 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
1696 | struct l2cap_conn_rsp rsp; | |
1697 | struct sock *sk, *parent; | |
e7c29cb1 | 1698 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
1699 | |
1700 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 1701 | __le16 psm = req->psm; |
1da177e4 LT |
1702 | |
1703 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
1704 | ||
1705 | /* Check if we have socket listening on psm */ | |
1706 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
1707 | if (!parent) { | |
1708 | result = L2CAP_CR_BAD_PSM; | |
1709 | goto sendresp; | |
1710 | } | |
1711 | ||
e7c29cb1 MH |
1712 | /* Check if the ACL is secure enough (if not SDP) */ |
1713 | if (psm != cpu_to_le16(0x0001) && | |
1714 | !hci_conn_check_link_mode(conn->hcon)) { | |
1715 | result = L2CAP_CR_SEC_BLOCK; | |
1716 | goto response; | |
1717 | } | |
1718 | ||
1da177e4 LT |
1719 | result = L2CAP_CR_NO_MEM; |
1720 | ||
1721 | /* Check for backlog size */ | |
1722 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 1723 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
1724 | goto response; |
1725 | } | |
1726 | ||
3b1e0a65 | 1727 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
1728 | if (!sk) |
1729 | goto response; | |
1730 | ||
fd1278d7 | 1731 | write_lock_bh(&list->lock); |
1da177e4 LT |
1732 | |
1733 | /* Check if we already have channel with that dcid */ | |
1734 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 1735 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1736 | sock_set_flag(sk, SOCK_ZAPPED); |
1737 | l2cap_sock_kill(sk); | |
1738 | goto response; | |
1739 | } | |
1740 | ||
1741 | hci_conn_hold(conn->hcon); | |
1742 | ||
1743 | l2cap_sock_init(sk, parent); | |
1744 | bacpy(&bt_sk(sk)->src, conn->src); | |
1745 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
1746 | l2cap_pi(sk)->psm = psm; | |
1747 | l2cap_pi(sk)->dcid = scid; | |
1748 | ||
1749 | __l2cap_chan_add(conn, sk, parent); | |
1750 | dcid = l2cap_pi(sk)->scid; | |
1751 | ||
1752 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1753 | ||
1da177e4 LT |
1754 | l2cap_pi(sk)->ident = cmd->ident; |
1755 | ||
79d554a6 MH |
1756 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
1757 | if (l2cap_check_link_mode(sk)) { | |
f66dc81f MH |
1758 | if (bt_sk(sk)->defer_setup) { |
1759 | sk->sk_state = BT_CONNECT2; | |
1760 | result = L2CAP_CR_PEND; | |
1761 | status = L2CAP_CS_AUTHOR_PEND; | |
1762 | parent->sk_data_ready(parent, 0); | |
1763 | } else { | |
1764 | sk->sk_state = BT_CONFIG; | |
1765 | result = L2CAP_CR_SUCCESS; | |
1766 | status = L2CAP_CS_NO_INFO; | |
1767 | } | |
79d554a6 MH |
1768 | } else { |
1769 | sk->sk_state = BT_CONNECT2; | |
1770 | result = L2CAP_CR_PEND; | |
1771 | status = L2CAP_CS_AUTHEN_PEND; | |
1772 | } | |
1773 | } else { | |
1774 | sk->sk_state = BT_CONNECT2; | |
1775 | result = L2CAP_CR_PEND; | |
1776 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
1777 | } |
1778 | ||
fd1278d7 | 1779 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1780 | |
1781 | response: | |
1782 | bh_unlock_sock(parent); | |
1783 | ||
1784 | sendresp: | |
aca3192c YH |
1785 | rsp.scid = cpu_to_le16(scid); |
1786 | rsp.dcid = cpu_to_le16(dcid); | |
1787 | rsp.result = cpu_to_le16(result); | |
1788 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 1789 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
1790 | |
1791 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
1792 | struct l2cap_info_req info; | |
1793 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
1794 | ||
1795 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
1796 | conn->info_ident = l2cap_get_ident(conn); | |
1797 | ||
1798 | mod_timer(&conn->info_timer, jiffies + | |
1799 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
1800 | ||
1801 | l2cap_send_cmd(conn, conn->info_ident, | |
1802 | L2CAP_INFO_REQ, sizeof(info), &info); | |
1803 | } | |
1804 | ||
1da177e4 LT |
1805 | return 0; |
1806 | } | |
1807 | ||
1808 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1809 | { | |
1810 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
1811 | u16 scid, dcid, result, status; | |
1812 | struct sock *sk; | |
1813 | u8 req[128]; | |
1814 | ||
1815 | scid = __le16_to_cpu(rsp->scid); | |
1816 | dcid = __le16_to_cpu(rsp->dcid); | |
1817 | result = __le16_to_cpu(rsp->result); | |
1818 | status = __le16_to_cpu(rsp->status); | |
1819 | ||
1820 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
1821 | ||
1822 | if (scid) { | |
1823 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1824 | return 0; | |
1825 | } else { | |
1826 | if (!(sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident))) | |
1827 | return 0; | |
1828 | } | |
1829 | ||
1830 | switch (result) { | |
1831 | case L2CAP_CR_SUCCESS: | |
1832 | sk->sk_state = BT_CONFIG; | |
1833 | l2cap_pi(sk)->ident = 0; | |
1834 | l2cap_pi(sk)->dcid = dcid; | |
1835 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
1836 | ||
1837 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1838 | l2cap_build_conf_req(sk, req), req); | |
1839 | break; | |
1840 | ||
1841 | case L2CAP_CR_PEND: | |
1842 | break; | |
1843 | ||
1844 | default: | |
1845 | l2cap_chan_del(sk, ECONNREFUSED); | |
1846 | break; | |
1847 | } | |
1848 | ||
1849 | bh_unlock_sock(sk); | |
1850 | return 0; | |
1851 | } | |
1852 | ||
88219a0f | 1853 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
1854 | { |
1855 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
1856 | u16 dcid, flags; | |
1857 | u8 rsp[64]; | |
1858 | struct sock *sk; | |
5dee9e7c | 1859 | int len; |
1da177e4 LT |
1860 | |
1861 | dcid = __le16_to_cpu(req->dcid); | |
1862 | flags = __le16_to_cpu(req->flags); | |
1863 | ||
1864 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
1865 | ||
1866 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
1867 | return -ENOENT; | |
1868 | ||
354f60a9 MH |
1869 | if (sk->sk_state == BT_DISCONN) |
1870 | goto unlock; | |
1871 | ||
5dee9e7c | 1872 | /* Reject if config buffer is too small. */ |
88219a0f | 1873 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
1874 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
1875 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
1876 | l2cap_build_conf_rsp(sk, rsp, | |
1877 | L2CAP_CONF_REJECT, flags), rsp); | |
1878 | goto unlock; | |
1879 | } | |
1880 | ||
1881 | /* Store config. */ | |
1882 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
1883 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
1884 | |
1885 | if (flags & 0x0001) { | |
1886 | /* Incomplete config. Send empty response. */ | |
1887 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
1888 | l2cap_build_conf_rsp(sk, rsp, |
1889 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
1890 | goto unlock; |
1891 | } | |
1892 | ||
1893 | /* Complete config. */ | |
5dee9e7c MH |
1894 | len = l2cap_parse_conf_req(sk, rsp); |
1895 | if (len < 0) | |
1da177e4 LT |
1896 | goto unlock; |
1897 | ||
5dee9e7c MH |
1898 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
1899 | ||
5dee9e7c MH |
1900 | /* Reset config buffer. */ |
1901 | l2cap_pi(sk)->conf_len = 0; | |
1902 | ||
876d9484 MH |
1903 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
1904 | goto unlock; | |
1905 | ||
1da177e4 LT |
1906 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
1907 | sk->sk_state = BT_CONNECTED; | |
1908 | l2cap_chan_ready(sk); | |
876d9484 MH |
1909 | goto unlock; |
1910 | } | |
1911 | ||
1912 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 1913 | u8 buf[64]; |
1da177e4 | 1914 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 1915 | l2cap_build_conf_req(sk, buf), buf); |
1da177e4 LT |
1916 | } |
1917 | ||
1918 | unlock: | |
1919 | bh_unlock_sock(sk); | |
1920 | return 0; | |
1921 | } | |
1922 | ||
1923 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1924 | { | |
1925 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
1926 | u16 scid, flags, result; | |
1927 | struct sock *sk; | |
1928 | ||
1929 | scid = __le16_to_cpu(rsp->scid); | |
1930 | flags = __le16_to_cpu(rsp->flags); | |
1931 | result = __le16_to_cpu(rsp->result); | |
1932 | ||
1933 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", scid, flags, result); | |
1934 | ||
1935 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1936 | return 0; | |
1937 | ||
1938 | switch (result) { | |
1939 | case L2CAP_CONF_SUCCESS: | |
1940 | break; | |
1941 | ||
1942 | case L2CAP_CONF_UNACCEPT: | |
1943 | if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) { | |
1944 | char req[128]; | |
1945 | /* It does not make sense to adjust L2CAP parameters | |
1946 | * that are currently defined in the spec. We simply | |
1947 | * resend config request that we sent earlier. It is | |
1948 | * stupid, but it helps qualification testing which | |
1949 | * expects at least some response from us. */ | |
1950 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1951 | l2cap_build_conf_req(sk, req), req); | |
1952 | goto done; | |
1953 | } | |
1954 | ||
8e87d142 | 1955 | default: |
1da177e4 | 1956 | sk->sk_state = BT_DISCONN; |
b1235d79 | 1957 | sk->sk_err = ECONNRESET; |
1da177e4 LT |
1958 | l2cap_sock_set_timer(sk, HZ * 5); |
1959 | { | |
1960 | struct l2cap_disconn_req req; | |
aca3192c YH |
1961 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
1962 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
1963 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
1964 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
1965 | } | |
1966 | goto done; | |
1967 | } | |
1968 | ||
1969 | if (flags & 0x01) | |
1970 | goto done; | |
1971 | ||
1da177e4 LT |
1972 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
1973 | ||
1974 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
1975 | sk->sk_state = BT_CONNECTED; | |
1976 | l2cap_chan_ready(sk); | |
1977 | } | |
1978 | ||
1979 | done: | |
1980 | bh_unlock_sock(sk); | |
1981 | return 0; | |
1982 | } | |
1983 | ||
1984 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1985 | { | |
1986 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
1987 | struct l2cap_disconn_rsp rsp; | |
1988 | u16 dcid, scid; | |
1989 | struct sock *sk; | |
1990 | ||
1991 | scid = __le16_to_cpu(req->scid); | |
1992 | dcid = __le16_to_cpu(req->dcid); | |
1993 | ||
1994 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
1995 | ||
1996 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
1997 | return 0; | |
1998 | ||
aca3192c YH |
1999 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
2000 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
2001 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
2002 | ||
2003 | sk->sk_shutdown = SHUTDOWN_MASK; | |
2004 | ||
2005 | l2cap_chan_del(sk, ECONNRESET); | |
2006 | bh_unlock_sock(sk); | |
2007 | ||
2008 | l2cap_sock_kill(sk); | |
2009 | return 0; | |
2010 | } | |
2011 | ||
2012 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2013 | { | |
2014 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
2015 | u16 dcid, scid; | |
2016 | struct sock *sk; | |
2017 | ||
2018 | scid = __le16_to_cpu(rsp->scid); | |
2019 | dcid = __le16_to_cpu(rsp->dcid); | |
2020 | ||
2021 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
2022 | ||
2023 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
2024 | return 0; | |
2025 | ||
2026 | l2cap_chan_del(sk, 0); | |
2027 | bh_unlock_sock(sk); | |
2028 | ||
2029 | l2cap_sock_kill(sk); | |
2030 | return 0; | |
2031 | } | |
2032 | ||
2033 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2034 | { | |
2035 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
2036 | u16 type; |
2037 | ||
2038 | type = __le16_to_cpu(req->type); | |
2039 | ||
2040 | BT_DBG("type 0x%4.4x", type); | |
2041 | ||
f0709e03 MH |
2042 | if (type == L2CAP_IT_FEAT_MASK) { |
2043 | u8 buf[8]; | |
2044 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
2045 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2046 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
2047 | put_unaligned(cpu_to_le32(l2cap_feat_mask), (__le32 *) rsp->data); | |
2048 | l2cap_send_cmd(conn, cmd->ident, | |
2049 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
2050 | } else { | |
2051 | struct l2cap_info_rsp rsp; | |
2052 | rsp.type = cpu_to_le16(type); | |
2053 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
2054 | l2cap_send_cmd(conn, cmd->ident, | |
2055 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
2056 | } | |
1da177e4 LT |
2057 | |
2058 | return 0; | |
2059 | } | |
2060 | ||
2061 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2062 | { | |
2063 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
2064 | u16 type, result; | |
2065 | ||
2066 | type = __le16_to_cpu(rsp->type); | |
2067 | result = __le16_to_cpu(rsp->result); | |
2068 | ||
2069 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
2070 | ||
4e8402a3 MH |
2071 | conn->info_ident = 0; |
2072 | ||
2073 | del_timer(&conn->info_timer); | |
2074 | ||
2075 | if (type == L2CAP_IT_FEAT_MASK) | |
83985319 | 2076 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 MH |
2077 | |
2078 | l2cap_conn_start(conn); | |
2079 | ||
1da177e4 LT |
2080 | return 0; |
2081 | } | |
2082 | ||
2083 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
2084 | { | |
2085 | u8 *data = skb->data; | |
2086 | int len = skb->len; | |
2087 | struct l2cap_cmd_hdr cmd; | |
2088 | int err = 0; | |
2089 | ||
2090 | l2cap_raw_recv(conn, skb); | |
2091 | ||
2092 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 2093 | u16 cmd_len; |
1da177e4 LT |
2094 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
2095 | data += L2CAP_CMD_HDR_SIZE; | |
2096 | len -= L2CAP_CMD_HDR_SIZE; | |
2097 | ||
88219a0f | 2098 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 2099 | |
88219a0f | 2100 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 2101 | |
88219a0f | 2102 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
2103 | BT_DBG("corrupted command"); |
2104 | break; | |
2105 | } | |
2106 | ||
2107 | switch (cmd.code) { | |
2108 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 2109 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
2110 | break; |
2111 | ||
2112 | case L2CAP_CONN_REQ: | |
2113 | err = l2cap_connect_req(conn, &cmd, data); | |
2114 | break; | |
2115 | ||
2116 | case L2CAP_CONN_RSP: | |
2117 | err = l2cap_connect_rsp(conn, &cmd, data); | |
2118 | break; | |
2119 | ||
2120 | case L2CAP_CONF_REQ: | |
88219a0f | 2121 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
2122 | break; |
2123 | ||
2124 | case L2CAP_CONF_RSP: | |
2125 | err = l2cap_config_rsp(conn, &cmd, data); | |
2126 | break; | |
2127 | ||
2128 | case L2CAP_DISCONN_REQ: | |
2129 | err = l2cap_disconnect_req(conn, &cmd, data); | |
2130 | break; | |
2131 | ||
2132 | case L2CAP_DISCONN_RSP: | |
2133 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
2134 | break; | |
2135 | ||
2136 | case L2CAP_ECHO_REQ: | |
88219a0f | 2137 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
2138 | break; |
2139 | ||
2140 | case L2CAP_ECHO_RSP: | |
2141 | break; | |
2142 | ||
2143 | case L2CAP_INFO_REQ: | |
2144 | err = l2cap_information_req(conn, &cmd, data); | |
2145 | break; | |
2146 | ||
2147 | case L2CAP_INFO_RSP: | |
2148 | err = l2cap_information_rsp(conn, &cmd, data); | |
2149 | break; | |
2150 | ||
2151 | default: | |
2152 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
2153 | err = -EINVAL; | |
2154 | break; | |
2155 | } | |
2156 | ||
2157 | if (err) { | |
2158 | struct l2cap_cmd_rej rej; | |
2159 | BT_DBG("error %d", err); | |
2160 | ||
2161 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 2162 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
2163 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
2164 | } | |
2165 | ||
88219a0f AV |
2166 | data += cmd_len; |
2167 | len -= cmd_len; | |
1da177e4 LT |
2168 | } |
2169 | ||
2170 | kfree_skb(skb); | |
2171 | } | |
2172 | ||
2173 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) | |
2174 | { | |
2175 | struct sock *sk; | |
2176 | ||
2177 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
2178 | if (!sk) { | |
2179 | BT_DBG("unknown cid 0x%4.4x", cid); | |
2180 | goto drop; | |
2181 | } | |
2182 | ||
2183 | BT_DBG("sk %p, len %d", sk, skb->len); | |
2184 | ||
2185 | if (sk->sk_state != BT_CONNECTED) | |
2186 | goto drop; | |
2187 | ||
2188 | if (l2cap_pi(sk)->imtu < skb->len) | |
2189 | goto drop; | |
2190 | ||
2191 | /* If socket recv buffers overflows we drop data here | |
2192 | * which is *bad* because L2CAP has to be reliable. | |
2193 | * But we don't have any other choice. L2CAP doesn't | |
2194 | * provide flow control mechanism. */ | |
2195 | ||
2196 | if (!sock_queue_rcv_skb(sk, skb)) | |
2197 | goto done; | |
2198 | ||
2199 | drop: | |
2200 | kfree_skb(skb); | |
2201 | ||
2202 | done: | |
0139418c MH |
2203 | if (sk) |
2204 | bh_unlock_sock(sk); | |
2205 | ||
1da177e4 LT |
2206 | return 0; |
2207 | } | |
2208 | ||
8e036fc3 | 2209 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
2210 | { |
2211 | struct sock *sk; | |
2212 | ||
2213 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
2214 | if (!sk) | |
2215 | goto drop; | |
2216 | ||
2217 | BT_DBG("sk %p, len %d", sk, skb->len); | |
2218 | ||
2219 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
2220 | goto drop; | |
2221 | ||
2222 | if (l2cap_pi(sk)->imtu < skb->len) | |
2223 | goto drop; | |
2224 | ||
2225 | if (!sock_queue_rcv_skb(sk, skb)) | |
2226 | goto done; | |
2227 | ||
2228 | drop: | |
2229 | kfree_skb(skb); | |
2230 | ||
2231 | done: | |
2232 | if (sk) bh_unlock_sock(sk); | |
2233 | return 0; | |
2234 | } | |
2235 | ||
2236 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
2237 | { | |
2238 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
2239 | u16 cid, len; |
2240 | __le16 psm; | |
1da177e4 LT |
2241 | |
2242 | skb_pull(skb, L2CAP_HDR_SIZE); | |
2243 | cid = __le16_to_cpu(lh->cid); | |
2244 | len = __le16_to_cpu(lh->len); | |
2245 | ||
2246 | BT_DBG("len %d, cid 0x%4.4x", len, cid); | |
2247 | ||
2248 | switch (cid) { | |
2249 | case 0x0001: | |
2250 | l2cap_sig_channel(conn, skb); | |
2251 | break; | |
2252 | ||
2253 | case 0x0002: | |
8e036fc3 | 2254 | psm = get_unaligned((__le16 *) skb->data); |
1da177e4 LT |
2255 | skb_pull(skb, 2); |
2256 | l2cap_conless_channel(conn, psm, skb); | |
2257 | break; | |
2258 | ||
2259 | default: | |
2260 | l2cap_data_channel(conn, cid, skb); | |
2261 | break; | |
2262 | } | |
2263 | } | |
2264 | ||
2265 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
2266 | ||
2267 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
2268 | { | |
2269 | int exact = 0, lm1 = 0, lm2 = 0; | |
2270 | register struct sock *sk; | |
2271 | struct hlist_node *node; | |
2272 | ||
2273 | if (type != ACL_LINK) | |
2274 | return 0; | |
2275 | ||
2276 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
2277 | ||
2278 | /* Find listening sockets and check their link_mode */ | |
2279 | read_lock(&l2cap_sk_list.lock); | |
2280 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
2281 | if (sk->sk_state != BT_LISTEN) | |
2282 | continue; | |
2283 | ||
2284 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2285 | lm1 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode); | |
2286 | exact++; | |
2287 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
2288 | lm2 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode); | |
2289 | } | |
2290 | read_unlock(&l2cap_sk_list.lock); | |
2291 | ||
2292 | return exact ? lm1 : lm2; | |
2293 | } | |
2294 | ||
2295 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
2296 | { | |
0139418c MH |
2297 | struct l2cap_conn *conn; |
2298 | ||
1da177e4 LT |
2299 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
2300 | ||
2301 | if (hcon->type != ACL_LINK) | |
2302 | return 0; | |
2303 | ||
2304 | if (!status) { | |
1da177e4 LT |
2305 | conn = l2cap_conn_add(hcon, status); |
2306 | if (conn) | |
2307 | l2cap_conn_ready(conn); | |
0139418c | 2308 | } else |
1da177e4 LT |
2309 | l2cap_conn_del(hcon, bt_err(status)); |
2310 | ||
2311 | return 0; | |
2312 | } | |
2313 | ||
2314 | static int l2cap_disconn_ind(struct hci_conn *hcon, u8 reason) | |
2315 | { | |
2316 | BT_DBG("hcon %p reason %d", hcon, reason); | |
2317 | ||
2318 | if (hcon->type != ACL_LINK) | |
2319 | return 0; | |
2320 | ||
2321 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 2322 | |
1da177e4 LT |
2323 | return 0; |
2324 | } | |
2325 | ||
2326 | static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status) | |
2327 | { | |
2328 | struct l2cap_chan_list *l; | |
40be492f | 2329 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 2330 | struct sock *sk; |
1da177e4 | 2331 | |
0139418c | 2332 | if (!conn) |
1da177e4 | 2333 | return 0; |
0139418c | 2334 | |
1da177e4 LT |
2335 | l = &conn->chan_list; |
2336 | ||
2337 | BT_DBG("conn %p", conn); | |
2338 | ||
2339 | read_lock(&l->lock); | |
2340 | ||
2341 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
40be492f MH |
2342 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
2343 | ||
1da177e4 LT |
2344 | bh_lock_sock(sk); |
2345 | ||
40be492f | 2346 | if ((pi->link_mode & (L2CAP_LM_ENCRYPT | L2CAP_LM_SECURE)) && |
b1235d79 MH |
2347 | !(hcon->link_mode & HCI_LM_ENCRYPT) && |
2348 | !status) { | |
1da177e4 LT |
2349 | bh_unlock_sock(sk); |
2350 | continue; | |
2351 | } | |
2352 | ||
b1235d79 MH |
2353 | if (sk->sk_state == BT_CONNECT) { |
2354 | if (!status) { | |
2355 | struct l2cap_conn_req req; | |
2356 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2357 | req.psm = l2cap_pi(sk)->psm; | |
2358 | ||
2359 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); | |
2360 | ||
2361 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
2362 | L2CAP_CONN_REQ, sizeof(req), &req); | |
2363 | } else { | |
2364 | l2cap_sock_clear_timer(sk); | |
2365 | l2cap_sock_set_timer(sk, HZ / 10); | |
2366 | } | |
2367 | } else if (sk->sk_state == BT_CONNECT2) { | |
2368 | struct l2cap_conn_rsp rsp; | |
2369 | __u16 result; | |
2370 | ||
2371 | if (!status) { | |
2372 | sk->sk_state = BT_CONFIG; | |
2373 | result = L2CAP_CR_SUCCESS; | |
2374 | } else { | |
2375 | sk->sk_state = BT_DISCONN; | |
2376 | l2cap_sock_set_timer(sk, HZ / 10); | |
2377 | result = L2CAP_CR_SEC_BLOCK; | |
2378 | } | |
1da177e4 | 2379 | |
b1235d79 MH |
2380 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
2381 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2382 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 2383 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
2384 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2385 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
2386 | } | |
1da177e4 LT |
2387 | |
2388 | bh_unlock_sock(sk); | |
2389 | } | |
2390 | ||
2391 | read_unlock(&l->lock); | |
b1235d79 | 2392 | |
1da177e4 LT |
2393 | return 0; |
2394 | } | |
2395 | ||
9719f8af | 2396 | static int l2cap_encrypt_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
2397 | { |
2398 | struct l2cap_chan_list *l; | |
0139418c | 2399 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 2400 | struct sock *sk; |
1da177e4 | 2401 | |
0139418c | 2402 | if (!conn) |
1da177e4 | 2403 | return 0; |
0139418c | 2404 | |
1da177e4 LT |
2405 | l = &conn->chan_list; |
2406 | ||
2407 | BT_DBG("conn %p", conn); | |
2408 | ||
2409 | read_lock(&l->lock); | |
2410 | ||
2411 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
9719f8af MH |
2412 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
2413 | ||
1da177e4 LT |
2414 | bh_lock_sock(sk); |
2415 | ||
9719f8af MH |
2416 | if ((pi->link_mode & (L2CAP_LM_ENCRYPT | L2CAP_LM_SECURE)) && |
2417 | (sk->sk_state == BT_CONNECTED || | |
2418 | sk->sk_state == BT_CONFIG) && | |
2419 | !status && encrypt == 0x00) { | |
2420 | __l2cap_sock_close(sk, ECONNREFUSED); | |
2421 | bh_unlock_sock(sk); | |
2422 | continue; | |
2423 | } | |
2424 | ||
b1235d79 MH |
2425 | if (sk->sk_state == BT_CONNECT) { |
2426 | if (!status) { | |
2427 | struct l2cap_conn_req req; | |
2428 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2429 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 2430 | |
b1235d79 | 2431 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
1da177e4 | 2432 | |
b1235d79 MH |
2433 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2434 | L2CAP_CONN_REQ, sizeof(req), &req); | |
2435 | } else { | |
2436 | l2cap_sock_clear_timer(sk); | |
2437 | l2cap_sock_set_timer(sk, HZ / 10); | |
2438 | } | |
2439 | } else if (sk->sk_state == BT_CONNECT2) { | |
2440 | struct l2cap_conn_rsp rsp; | |
2441 | __u16 result; | |
1da177e4 | 2442 | |
b1235d79 MH |
2443 | if (!status) { |
2444 | sk->sk_state = BT_CONFIG; | |
2445 | result = L2CAP_CR_SUCCESS; | |
2446 | } else { | |
2447 | sk->sk_state = BT_DISCONN; | |
2448 | l2cap_sock_set_timer(sk, HZ / 10); | |
2449 | result = L2CAP_CR_SEC_BLOCK; | |
2450 | } | |
2451 | ||
2452 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
2453 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2454 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 2455 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
2456 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2457 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
2458 | } | |
1da177e4 LT |
2459 | |
2460 | bh_unlock_sock(sk); | |
2461 | } | |
2462 | ||
2463 | read_unlock(&l->lock); | |
b1235d79 | 2464 | |
1da177e4 LT |
2465 | return 0; |
2466 | } | |
2467 | ||
2468 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
2469 | { | |
2470 | struct l2cap_conn *conn = hcon->l2cap_data; | |
2471 | ||
2472 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
2473 | goto drop; | |
2474 | ||
2475 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
2476 | ||
2477 | if (flags & ACL_START) { | |
2478 | struct l2cap_hdr *hdr; | |
2479 | int len; | |
2480 | ||
2481 | if (conn->rx_len) { | |
2482 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
2483 | kfree_skb(conn->rx_skb); | |
2484 | conn->rx_skb = NULL; | |
2485 | conn->rx_len = 0; | |
2486 | l2cap_conn_unreliable(conn, ECOMM); | |
2487 | } | |
2488 | ||
2489 | if (skb->len < 2) { | |
2490 | BT_ERR("Frame is too short (len %d)", skb->len); | |
2491 | l2cap_conn_unreliable(conn, ECOMM); | |
2492 | goto drop; | |
2493 | } | |
2494 | ||
2495 | hdr = (struct l2cap_hdr *) skb->data; | |
2496 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
2497 | ||
2498 | if (len == skb->len) { | |
2499 | /* Complete frame received */ | |
2500 | l2cap_recv_frame(conn, skb); | |
2501 | return 0; | |
2502 | } | |
2503 | ||
2504 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
2505 | ||
2506 | if (skb->len > len) { | |
2507 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
2508 | skb->len, len); | |
2509 | l2cap_conn_unreliable(conn, ECOMM); | |
2510 | goto drop; | |
2511 | } | |
2512 | ||
2513 | /* Allocate skb for the complete frame (with header) */ | |
2514 | if (!(conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC))) | |
2515 | goto drop; | |
2516 | ||
d626f62b ACM |
2517 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
2518 | skb->len); | |
1da177e4 LT |
2519 | conn->rx_len = len - skb->len; |
2520 | } else { | |
2521 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
2522 | ||
2523 | if (!conn->rx_len) { | |
2524 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
2525 | l2cap_conn_unreliable(conn, ECOMM); | |
2526 | goto drop; | |
2527 | } | |
2528 | ||
2529 | if (skb->len > conn->rx_len) { | |
2530 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
2531 | skb->len, conn->rx_len); | |
2532 | kfree_skb(conn->rx_skb); | |
2533 | conn->rx_skb = NULL; | |
2534 | conn->rx_len = 0; | |
2535 | l2cap_conn_unreliable(conn, ECOMM); | |
2536 | goto drop; | |
2537 | } | |
2538 | ||
d626f62b ACM |
2539 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
2540 | skb->len); | |
1da177e4 LT |
2541 | conn->rx_len -= skb->len; |
2542 | ||
2543 | if (!conn->rx_len) { | |
2544 | /* Complete frame received */ | |
2545 | l2cap_recv_frame(conn, conn->rx_skb); | |
2546 | conn->rx_skb = NULL; | |
2547 | } | |
2548 | } | |
2549 | ||
2550 | drop: | |
2551 | kfree_skb(skb); | |
2552 | return 0; | |
2553 | } | |
2554 | ||
be9d1227 | 2555 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
2556 | { |
2557 | struct sock *sk; | |
2558 | struct hlist_node *node; | |
be9d1227 | 2559 | char *str = buf; |
1da177e4 LT |
2560 | |
2561 | read_lock_bh(&l2cap_sk_list.lock); | |
2562 | ||
be9d1227 MH |
2563 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
2564 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1da177e4 | 2565 | |
be9d1227 MH |
2566 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d 0x%x\n", |
2567 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), | |
73863976 MH |
2568 | sk->sk_state, btohs(pi->psm), pi->scid, pi->dcid, |
2569 | pi->imtu, pi->omtu, pi->link_mode); | |
be9d1227 | 2570 | } |
1da177e4 | 2571 | |
1da177e4 | 2572 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 2573 | |
be9d1227 | 2574 | return (str - buf); |
1da177e4 LT |
2575 | } |
2576 | ||
be9d1227 | 2577 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
1da177e4 | 2578 | |
90ddc4f0 | 2579 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
2580 | .family = PF_BLUETOOTH, |
2581 | .owner = THIS_MODULE, | |
2582 | .release = l2cap_sock_release, | |
2583 | .bind = l2cap_sock_bind, | |
2584 | .connect = l2cap_sock_connect, | |
2585 | .listen = l2cap_sock_listen, | |
2586 | .accept = l2cap_sock_accept, | |
2587 | .getname = l2cap_sock_getname, | |
2588 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 2589 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 2590 | .poll = bt_sock_poll, |
3241ad82 | 2591 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
2592 | .mmap = sock_no_mmap, |
2593 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
2594 | .shutdown = l2cap_sock_shutdown, |
2595 | .setsockopt = l2cap_sock_setsockopt, | |
2596 | .getsockopt = l2cap_sock_getsockopt | |
2597 | }; | |
2598 | ||
2599 | static struct net_proto_family l2cap_sock_family_ops = { | |
2600 | .family = PF_BLUETOOTH, | |
2601 | .owner = THIS_MODULE, | |
2602 | .create = l2cap_sock_create, | |
2603 | }; | |
2604 | ||
2605 | static struct hci_proto l2cap_hci_proto = { | |
2606 | .name = "L2CAP", | |
2607 | .id = HCI_PROTO_L2CAP, | |
2608 | .connect_ind = l2cap_connect_ind, | |
2609 | .connect_cfm = l2cap_connect_cfm, | |
2610 | .disconn_ind = l2cap_disconn_ind, | |
2611 | .auth_cfm = l2cap_auth_cfm, | |
2612 | .encrypt_cfm = l2cap_encrypt_cfm, | |
2613 | .recv_acldata = l2cap_recv_acldata | |
2614 | }; | |
2615 | ||
2616 | static int __init l2cap_init(void) | |
2617 | { | |
2618 | int err; | |
be9d1227 | 2619 | |
1da177e4 LT |
2620 | err = proto_register(&l2cap_proto, 0); |
2621 | if (err < 0) | |
2622 | return err; | |
2623 | ||
2624 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
2625 | if (err < 0) { | |
2626 | BT_ERR("L2CAP socket registration failed"); | |
2627 | goto error; | |
2628 | } | |
2629 | ||
2630 | err = hci_register_proto(&l2cap_hci_proto); | |
2631 | if (err < 0) { | |
2632 | BT_ERR("L2CAP protocol registration failed"); | |
2633 | bt_sock_unregister(BTPROTO_L2CAP); | |
2634 | goto error; | |
2635 | } | |
2636 | ||
df5c37ea MH |
2637 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
2638 | BT_ERR("Failed to create L2CAP info file"); | |
1da177e4 LT |
2639 | |
2640 | BT_INFO("L2CAP ver %s", VERSION); | |
2641 | BT_INFO("L2CAP socket layer initialized"); | |
2642 | ||
2643 | return 0; | |
2644 | ||
2645 | error: | |
2646 | proto_unregister(&l2cap_proto); | |
2647 | return err; | |
2648 | } | |
2649 | ||
2650 | static void __exit l2cap_exit(void) | |
2651 | { | |
a91f2e39 | 2652 | class_remove_file(bt_class, &class_attr_l2cap); |
1da177e4 LT |
2653 | |
2654 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
2655 | BT_ERR("L2CAP socket unregistration failed"); | |
2656 | ||
2657 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
2658 | BT_ERR("L2CAP protocol unregistration failed"); | |
2659 | ||
2660 | proto_unregister(&l2cap_proto); | |
2661 | } | |
2662 | ||
2663 | void l2cap_load(void) | |
2664 | { | |
2665 | /* Dummy function to trigger automatic L2CAP module loading by | |
2666 | * other modules that use L2CAP sockets but don't use any other | |
2667 | * symbols from it. */ | |
2668 | return; | |
2669 | } | |
2670 | EXPORT_SYMBOL(l2cap_load); | |
2671 | ||
2672 | module_init(l2cap_init); | |
2673 | module_exit(l2cap_exit); | |
2674 | ||
63fbd24e | 2675 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
2676 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
2677 | MODULE_VERSION(VERSION); | |
2678 | MODULE_LICENSE("GPL"); | |
2679 | MODULE_ALIAS("bt-proto-0"); |