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 && | |
2af6b9d5 | 81 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
b1235d79 MH |
82 | reason = ECONNREFUSED; |
83 | else | |
84 | reason = ETIMEDOUT; | |
85 | ||
86 | __l2cap_sock_close(sk, reason); | |
87 | ||
1da177e4 LT |
88 | bh_unlock_sock(sk); |
89 | ||
90 | l2cap_sock_kill(sk); | |
91 | sock_put(sk); | |
92 | } | |
93 | ||
94 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
95 | { | |
96 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
97 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
98 | } | |
99 | ||
100 | static void l2cap_sock_clear_timer(struct sock *sk) | |
101 | { | |
102 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
103 | sk_stop_timer(sk, &sk->sk_timer); | |
104 | } | |
105 | ||
0139418c MH |
106 | /* ---- L2CAP channels ---- */ |
107 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
108 | { | |
109 | struct sock *s; | |
110 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
111 | if (l2cap_pi(s)->dcid == cid) | |
112 | break; | |
113 | } | |
114 | return s; | |
115 | } | |
116 | ||
117 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
118 | { | |
119 | struct sock *s; | |
120 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
121 | if (l2cap_pi(s)->scid == cid) | |
122 | break; | |
123 | } | |
124 | return s; | |
125 | } | |
126 | ||
127 | /* Find channel with given SCID. | |
128 | * Returns locked socket */ | |
129 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
130 | { | |
131 | struct sock *s; | |
132 | read_lock(&l->lock); | |
133 | s = __l2cap_get_chan_by_scid(l, cid); | |
134 | if (s) bh_lock_sock(s); | |
135 | read_unlock(&l->lock); | |
136 | return s; | |
137 | } | |
138 | ||
139 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
140 | { | |
141 | struct sock *s; | |
142 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
143 | if (l2cap_pi(s)->ident == ident) | |
144 | break; | |
145 | } | |
146 | return s; | |
147 | } | |
148 | ||
149 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
150 | { | |
151 | struct sock *s; | |
152 | read_lock(&l->lock); | |
153 | s = __l2cap_get_chan_by_ident(l, ident); | |
154 | if (s) bh_lock_sock(s); | |
155 | read_unlock(&l->lock); | |
156 | return s; | |
157 | } | |
158 | ||
159 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
160 | { | |
161 | u16 cid = 0x0040; | |
162 | ||
163 | for (; cid < 0xffff; cid++) { | |
164 | if(!__l2cap_get_chan_by_scid(l, cid)) | |
165 | return cid; | |
166 | } | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
172 | { | |
173 | sock_hold(sk); | |
174 | ||
175 | if (l->head) | |
176 | l2cap_pi(l->head)->prev_c = sk; | |
177 | ||
178 | l2cap_pi(sk)->next_c = l->head; | |
179 | l2cap_pi(sk)->prev_c = NULL; | |
180 | l->head = sk; | |
181 | } | |
182 | ||
183 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
184 | { | |
185 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
186 | ||
fd1278d7 | 187 | write_lock_bh(&l->lock); |
0139418c MH |
188 | if (sk == l->head) |
189 | l->head = next; | |
190 | ||
191 | if (next) | |
192 | l2cap_pi(next)->prev_c = prev; | |
193 | if (prev) | |
194 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 195 | write_unlock_bh(&l->lock); |
0139418c MH |
196 | |
197 | __sock_put(sk); | |
198 | } | |
199 | ||
200 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
201 | { | |
202 | struct l2cap_chan_list *l = &conn->chan_list; | |
203 | ||
204 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
205 | ||
206 | l2cap_pi(sk)->conn = conn; | |
207 | ||
208 | if (sk->sk_type == SOCK_SEQPACKET) { | |
209 | /* Alloc CID for connection-oriented socket */ | |
210 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
211 | } else if (sk->sk_type == SOCK_DGRAM) { | |
212 | /* Connectionless socket */ | |
213 | l2cap_pi(sk)->scid = 0x0002; | |
214 | l2cap_pi(sk)->dcid = 0x0002; | |
215 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
216 | } else { | |
217 | /* Raw socket can send/recv signalling messages only */ | |
218 | l2cap_pi(sk)->scid = 0x0001; | |
219 | l2cap_pi(sk)->dcid = 0x0001; | |
220 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
221 | } | |
222 | ||
223 | __l2cap_chan_link(l, sk); | |
224 | ||
225 | if (parent) | |
226 | bt_accept_enqueue(parent, sk); | |
227 | } | |
228 | ||
8e87d142 | 229 | /* Delete channel. |
0139418c MH |
230 | * Must be called on the locked socket. */ |
231 | static void l2cap_chan_del(struct sock *sk, int err) | |
232 | { | |
233 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
234 | struct sock *parent = bt_sk(sk)->parent; | |
235 | ||
236 | l2cap_sock_clear_timer(sk); | |
237 | ||
238 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
239 | ||
8e87d142 | 240 | if (conn) { |
0139418c MH |
241 | /* Unlink from channel list */ |
242 | l2cap_chan_unlink(&conn->chan_list, sk); | |
243 | l2cap_pi(sk)->conn = NULL; | |
244 | hci_conn_put(conn->hcon); | |
245 | } | |
246 | ||
b1235d79 | 247 | sk->sk_state = BT_CLOSED; |
0139418c MH |
248 | sock_set_flag(sk, SOCK_ZAPPED); |
249 | ||
250 | if (err) | |
251 | sk->sk_err = err; | |
252 | ||
253 | if (parent) { | |
254 | bt_accept_unlink(sk); | |
255 | parent->sk_data_ready(parent, 0); | |
256 | } else | |
257 | sk->sk_state_change(sk); | |
258 | } | |
259 | ||
79d554a6 | 260 | /* Service level security */ |
2af6b9d5 | 261 | static inline int l2cap_check_security(struct sock *sk) |
79d554a6 MH |
262 | { |
263 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
264 | ||
2af6b9d5 | 265 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level); |
79d554a6 MH |
266 | } |
267 | ||
4e8402a3 MH |
268 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
269 | { | |
270 | u8 id; | |
271 | ||
272 | /* Get next available identificator. | |
273 | * 1 - 128 are used by kernel. | |
274 | * 129 - 199 are reserved. | |
275 | * 200 - 254 are used by utilities like l2ping, etc. | |
276 | */ | |
277 | ||
278 | spin_lock_bh(&conn->lock); | |
279 | ||
280 | if (++conn->tx_ident > 128) | |
281 | conn->tx_ident = 1; | |
282 | ||
283 | id = conn->tx_ident; | |
284 | ||
285 | spin_unlock_bh(&conn->lock); | |
286 | ||
287 | return id; | |
288 | } | |
289 | ||
290 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) | |
291 | { | |
292 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
293 | ||
294 | BT_DBG("code 0x%2.2x", code); | |
295 | ||
296 | if (!skb) | |
297 | return -ENOMEM; | |
298 | ||
299 | return hci_send_acl(conn->hcon, skb, 0); | |
300 | } | |
301 | ||
79d554a6 MH |
302 | static void l2cap_do_start(struct sock *sk) |
303 | { | |
304 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
305 | ||
306 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
2af6b9d5 | 307 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
308 | struct l2cap_conn_req req; |
309 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
310 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 311 | |
b1235d79 | 312 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 313 | |
b1235d79 | 314 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 315 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 316 | } |
79d554a6 MH |
317 | } else { |
318 | struct l2cap_info_req req; | |
319 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
320 | ||
321 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
322 | conn->info_ident = l2cap_get_ident(conn); | |
323 | ||
324 | mod_timer(&conn->info_timer, jiffies + | |
325 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
326 | ||
327 | l2cap_send_cmd(conn, conn->info_ident, | |
328 | L2CAP_INFO_REQ, sizeof(req), &req); | |
329 | } | |
330 | } | |
331 | ||
1da177e4 | 332 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
333 | static void l2cap_conn_start(struct l2cap_conn *conn) |
334 | { | |
335 | struct l2cap_chan_list *l = &conn->chan_list; | |
336 | struct sock *sk; | |
337 | ||
338 | BT_DBG("conn %p", conn); | |
339 | ||
340 | read_lock(&l->lock); | |
341 | ||
342 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
343 | bh_lock_sock(sk); | |
344 | ||
345 | if (sk->sk_type != SOCK_SEQPACKET) { | |
79d554a6 MH |
346 | bh_unlock_sock(sk); |
347 | continue; | |
348 | } | |
349 | ||
350 | if (sk->sk_state == BT_CONNECT) { | |
2af6b9d5 | 351 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
352 | struct l2cap_conn_req req; |
353 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
354 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 355 | |
b1235d79 | 356 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 357 | |
b1235d79 | 358 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4e8402a3 | 359 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 360 | } |
79d554a6 MH |
361 | } else if (sk->sk_state == BT_CONNECT2) { |
362 | struct l2cap_conn_rsp rsp; | |
363 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
364 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
365 | ||
2af6b9d5 | 366 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
367 | if (bt_sk(sk)->defer_setup) { |
368 | struct sock *parent = bt_sk(sk)->parent; | |
369 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
370 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
371 | parent->sk_data_ready(parent, 0); | |
372 | ||
373 | } else { | |
374 | sk->sk_state = BT_CONFIG; | |
375 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
376 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
377 | } | |
79d554a6 MH |
378 | } else { |
379 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
380 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
381 | } | |
382 | ||
383 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
384 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4e8402a3 MH |
385 | } |
386 | ||
387 | bh_unlock_sock(sk); | |
388 | } | |
389 | ||
390 | read_unlock(&l->lock); | |
391 | } | |
392 | ||
393 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
394 | { | |
79d554a6 MH |
395 | struct l2cap_chan_list *l = &conn->chan_list; |
396 | struct sock *sk; | |
4e8402a3 | 397 | |
79d554a6 | 398 | BT_DBG("conn %p", conn); |
4e8402a3 | 399 | |
79d554a6 | 400 | read_lock(&l->lock); |
4e8402a3 | 401 | |
79d554a6 MH |
402 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
403 | bh_lock_sock(sk); | |
4e8402a3 | 404 | |
79d554a6 MH |
405 | if (sk->sk_type != SOCK_SEQPACKET) { |
406 | l2cap_sock_clear_timer(sk); | |
407 | sk->sk_state = BT_CONNECTED; | |
408 | sk->sk_state_change(sk); | |
409 | } else if (sk->sk_state == BT_CONNECT) | |
410 | l2cap_do_start(sk); | |
4e8402a3 | 411 | |
79d554a6 | 412 | bh_unlock_sock(sk); |
4e8402a3 | 413 | } |
79d554a6 MH |
414 | |
415 | read_unlock(&l->lock); | |
4e8402a3 MH |
416 | } |
417 | ||
418 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
419 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
420 | { | |
421 | struct l2cap_chan_list *l = &conn->chan_list; | |
422 | struct sock *sk; | |
423 | ||
424 | BT_DBG("conn %p", conn); | |
425 | ||
426 | read_lock(&l->lock); | |
427 | ||
428 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 429 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
430 | sk->sk_err = err; |
431 | } | |
432 | ||
433 | read_unlock(&l->lock); | |
434 | } | |
435 | ||
436 | static void l2cap_info_timeout(unsigned long arg) | |
437 | { | |
438 | struct l2cap_conn *conn = (void *) arg; | |
439 | ||
440 | conn->info_ident = 0; | |
441 | ||
442 | l2cap_conn_start(conn); | |
443 | } | |
444 | ||
1da177e4 LT |
445 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
446 | { | |
0139418c | 447 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 448 | |
0139418c | 449 | if (conn || status) |
1da177e4 LT |
450 | return conn; |
451 | ||
0139418c MH |
452 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
453 | if (!conn) | |
1da177e4 | 454 | return NULL; |
1da177e4 LT |
455 | |
456 | hcon->l2cap_data = conn; | |
457 | conn->hcon = hcon; | |
458 | ||
0139418c MH |
459 | BT_DBG("hcon %p conn %p", hcon, conn); |
460 | ||
1da177e4 LT |
461 | conn->mtu = hcon->hdev->acl_mtu; |
462 | conn->src = &hcon->hdev->bdaddr; | |
463 | conn->dst = &hcon->dst; | |
464 | ||
4e8402a3 MH |
465 | conn->feat_mask = 0; |
466 | ||
b1235d79 MH |
467 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
468 | (unsigned long) conn); | |
4e8402a3 | 469 | |
1da177e4 LT |
470 | spin_lock_init(&conn->lock); |
471 | rwlock_init(&conn->chan_list.lock); | |
472 | ||
1da177e4 LT |
473 | return conn; |
474 | } | |
475 | ||
0139418c | 476 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 477 | { |
0139418c | 478 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
479 | struct sock *sk; |
480 | ||
0139418c MH |
481 | if (!conn) |
482 | return; | |
1da177e4 LT |
483 | |
484 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
485 | ||
486 | if (conn->rx_skb) | |
487 | kfree_skb(conn->rx_skb); | |
488 | ||
489 | /* Kill channels */ | |
490 | while ((sk = conn->chan_list.head)) { | |
491 | bh_lock_sock(sk); | |
492 | l2cap_chan_del(sk, err); | |
493 | bh_unlock_sock(sk); | |
494 | l2cap_sock_kill(sk); | |
495 | } | |
496 | ||
8e8440f5 DY |
497 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
498 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 499 | |
1da177e4 LT |
500 | hcon->l2cap_data = NULL; |
501 | kfree(conn); | |
1da177e4 LT |
502 | } |
503 | ||
504 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
505 | { | |
506 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 507 | write_lock_bh(&l->lock); |
1da177e4 | 508 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 509 | write_unlock_bh(&l->lock); |
1da177e4 LT |
510 | } |
511 | ||
1da177e4 | 512 | /* ---- Socket interface ---- */ |
8e036fc3 | 513 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
514 | { |
515 | struct sock *sk; | |
516 | struct hlist_node *node; | |
517 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
518 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
519 | goto found; | |
520 | sk = NULL; | |
521 | found: | |
522 | return sk; | |
523 | } | |
524 | ||
525 | /* Find socket with psm and source bdaddr. | |
526 | * Returns closest match. | |
527 | */ | |
8e036fc3 | 528 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
529 | { |
530 | struct sock *sk = NULL, *sk1 = NULL; | |
531 | struct hlist_node *node; | |
532 | ||
533 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
534 | if (state && sk->sk_state != state) | |
535 | continue; | |
536 | ||
537 | if (l2cap_pi(sk)->psm == psm) { | |
538 | /* Exact match. */ | |
539 | if (!bacmp(&bt_sk(sk)->src, src)) | |
540 | break; | |
541 | ||
542 | /* Closest match */ | |
543 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
544 | sk1 = sk; | |
545 | } | |
546 | } | |
547 | return node ? sk : sk1; | |
548 | } | |
549 | ||
550 | /* Find socket with given address (psm, src). | |
551 | * Returns locked socket */ | |
8e036fc3 | 552 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
553 | { |
554 | struct sock *s; | |
555 | read_lock(&l2cap_sk_list.lock); | |
556 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
557 | if (s) bh_lock_sock(s); | |
558 | read_unlock(&l2cap_sk_list.lock); | |
559 | return s; | |
560 | } | |
561 | ||
562 | static void l2cap_sock_destruct(struct sock *sk) | |
563 | { | |
564 | BT_DBG("sk %p", sk); | |
565 | ||
566 | skb_queue_purge(&sk->sk_receive_queue); | |
567 | skb_queue_purge(&sk->sk_write_queue); | |
568 | } | |
569 | ||
570 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
571 | { | |
572 | struct sock *sk; | |
573 | ||
574 | BT_DBG("parent %p", parent); | |
575 | ||
576 | /* Close not yet accepted channels */ | |
577 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
578 | l2cap_sock_close(sk); | |
579 | ||
b1235d79 | 580 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
581 | sock_set_flag(parent, SOCK_ZAPPED); |
582 | } | |
583 | ||
584 | /* Kill socket (only if zapped and orphan) | |
585 | * Must be called on unlocked socket. | |
586 | */ | |
587 | static void l2cap_sock_kill(struct sock *sk) | |
588 | { | |
589 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
590 | return; | |
591 | ||
592 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
593 | ||
594 | /* Kill poor orphan */ | |
595 | bt_sock_unlink(&l2cap_sk_list, sk); | |
596 | sock_set_flag(sk, SOCK_DEAD); | |
597 | sock_put(sk); | |
598 | } | |
599 | ||
600 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
601 | { | |
602 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
603 | ||
604 | switch (sk->sk_state) { | |
605 | case BT_LISTEN: | |
606 | l2cap_sock_cleanup_listen(sk); | |
607 | break; | |
608 | ||
609 | case BT_CONNECTED: | |
610 | case BT_CONFIG: | |
1da177e4 LT |
611 | if (sk->sk_type == SOCK_SEQPACKET) { |
612 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
613 | struct l2cap_disconn_req req; | |
614 | ||
615 | sk->sk_state = BT_DISCONN; | |
616 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
617 | ||
aca3192c YH |
618 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
619 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
620 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
621 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
b1235d79 | 622 | } else |
1da177e4 | 623 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
624 | break; |
625 | ||
f66dc81f MH |
626 | case BT_CONNECT2: |
627 | if (sk->sk_type == SOCK_SEQPACKET) { | |
628 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
629 | struct l2cap_conn_rsp rsp; | |
630 | __u16 result; | |
631 | ||
632 | if (bt_sk(sk)->defer_setup) | |
633 | result = L2CAP_CR_SEC_BLOCK; | |
634 | else | |
635 | result = L2CAP_CR_BAD_PSM; | |
636 | ||
637 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
638 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
639 | rsp.result = cpu_to_le16(result); | |
640 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
641 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
642 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
643 | } else | |
644 | l2cap_chan_del(sk, reason); | |
645 | break; | |
646 | ||
1da177e4 LT |
647 | case BT_CONNECT: |
648 | case BT_DISCONN: | |
649 | l2cap_chan_del(sk, reason); | |
650 | break; | |
651 | ||
652 | default: | |
653 | sock_set_flag(sk, SOCK_ZAPPED); | |
654 | break; | |
655 | } | |
656 | } | |
657 | ||
658 | /* Must be called on unlocked socket. */ | |
659 | static void l2cap_sock_close(struct sock *sk) | |
660 | { | |
661 | l2cap_sock_clear_timer(sk); | |
662 | lock_sock(sk); | |
663 | __l2cap_sock_close(sk, ECONNRESET); | |
664 | release_sock(sk); | |
665 | l2cap_sock_kill(sk); | |
666 | } | |
667 | ||
668 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
669 | { | |
670 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
671 | ||
672 | BT_DBG("sk %p", sk); | |
673 | ||
674 | if (parent) { | |
675 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
676 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
677 | ||
1da177e4 LT |
678 | pi->imtu = l2cap_pi(parent)->imtu; |
679 | pi->omtu = l2cap_pi(parent)->omtu; | |
2af6b9d5 MH |
680 | pi->sec_level = l2cap_pi(parent)->sec_level; |
681 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
682 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
683 | } else { |
684 | pi->imtu = L2CAP_DEFAULT_MTU; | |
685 | pi->omtu = 0; | |
2af6b9d5 MH |
686 | pi->sec_level = BT_SECURITY_LOW; |
687 | pi->role_switch = 0; | |
688 | pi->force_reliable = 0; | |
1da177e4 LT |
689 | } |
690 | ||
691 | /* Default config options */ | |
5dee9e7c | 692 | pi->conf_len = 0; |
1da177e4 LT |
693 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
694 | } | |
695 | ||
696 | static struct proto l2cap_proto = { | |
697 | .name = "L2CAP", | |
698 | .owner = THIS_MODULE, | |
699 | .obj_size = sizeof(struct l2cap_pinfo) | |
700 | }; | |
701 | ||
1b8d7ae4 | 702 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
703 | { |
704 | struct sock *sk; | |
705 | ||
6257ff21 | 706 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
707 | if (!sk) |
708 | return NULL; | |
709 | ||
710 | sock_init_data(sock, sk); | |
711 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
712 | ||
713 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 714 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
715 | |
716 | sock_reset_flag(sk, SOCK_ZAPPED); | |
717 | ||
718 | sk->sk_protocol = proto; | |
b1235d79 | 719 | sk->sk_state = BT_OPEN; |
1da177e4 | 720 | |
b1235d79 | 721 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
722 | |
723 | bt_sock_link(&l2cap_sk_list, sk); | |
724 | return sk; | |
725 | } | |
726 | ||
1b8d7ae4 | 727 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
728 | { |
729 | struct sock *sk; | |
730 | ||
731 | BT_DBG("sock %p", sock); | |
732 | ||
733 | sock->state = SS_UNCONNECTED; | |
734 | ||
735 | if (sock->type != SOCK_SEQPACKET && | |
736 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
737 | return -ESOCKTNOSUPPORT; | |
738 | ||
739 | if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW)) | |
740 | return -EPERM; | |
741 | ||
742 | sock->ops = &l2cap_sock_ops; | |
743 | ||
1b8d7ae4 | 744 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
745 | if (!sk) |
746 | return -ENOMEM; | |
747 | ||
748 | l2cap_sock_init(sk, NULL); | |
749 | return 0; | |
750 | } | |
751 | ||
752 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
753 | { | |
754 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
755 | struct sock *sk = sock->sk; | |
756 | int err = 0; | |
757 | ||
758 | BT_DBG("sk %p, %s %d", sk, batostr(&la->l2_bdaddr), la->l2_psm); | |
759 | ||
760 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
761 | return -EINVAL; | |
762 | ||
763 | lock_sock(sk); | |
764 | ||
765 | if (sk->sk_state != BT_OPEN) { | |
766 | err = -EBADFD; | |
767 | goto done; | |
768 | } | |
769 | ||
8e036fc3 | 770 | if (la->l2_psm && btohs(la->l2_psm) < 0x1001 && |
847641d7 MH |
771 | !capable(CAP_NET_BIND_SERVICE)) { |
772 | err = -EACCES; | |
773 | goto done; | |
774 | } | |
8e87d142 | 775 | |
1da177e4 LT |
776 | write_lock_bh(&l2cap_sk_list.lock); |
777 | ||
778 | if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) { | |
779 | err = -EADDRINUSE; | |
780 | } else { | |
781 | /* Save source address */ | |
782 | bacpy(&bt_sk(sk)->src, &la->l2_bdaddr); | |
783 | l2cap_pi(sk)->psm = la->l2_psm; | |
784 | l2cap_pi(sk)->sport = la->l2_psm; | |
785 | sk->sk_state = BT_BOUND; | |
2af6b9d5 MH |
786 | |
787 | if (btohs(la->l2_psm) == 0x0001) | |
788 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
1da177e4 LT |
789 | } |
790 | ||
791 | write_unlock_bh(&l2cap_sk_list.lock); | |
792 | ||
793 | done: | |
794 | release_sock(sk); | |
795 | return err; | |
796 | } | |
797 | ||
798 | static int l2cap_do_connect(struct sock *sk) | |
799 | { | |
800 | bdaddr_t *src = &bt_sk(sk)->src; | |
801 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
802 | struct l2cap_conn *conn; | |
803 | struct hci_conn *hcon; | |
804 | struct hci_dev *hdev; | |
09ab6f4c | 805 | __u8 auth_type; |
1da177e4 LT |
806 | int err = 0; |
807 | ||
808 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), l2cap_pi(sk)->psm); | |
809 | ||
810 | if (!(hdev = hci_get_route(dst, src))) | |
811 | return -EHOSTUNREACH; | |
812 | ||
813 | hci_dev_lock_bh(hdev); | |
814 | ||
815 | err = -ENOMEM; | |
816 | ||
8c1b2355 | 817 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
818 | switch (l2cap_pi(sk)->sec_level) { |
819 | case BT_SECURITY_HIGH: | |
8c1b2355 | 820 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
821 | break; |
822 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 823 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
824 | break; |
825 | default: | |
09ab6f4c | 826 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
827 | break; |
828 | } | |
8c1b2355 | 829 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 830 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 831 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 832 | else |
8c1b2355 MH |
833 | auth_type = HCI_AT_NO_BONDING; |
834 | } else { | |
2af6b9d5 MH |
835 | switch (l2cap_pi(sk)->sec_level) { |
836 | case BT_SECURITY_HIGH: | |
8c1b2355 | 837 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
838 | break; |
839 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 840 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
841 | break; |
842 | default: | |
8c1b2355 | 843 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
844 | break; |
845 | } | |
09ab6f4c MH |
846 | } |
847 | ||
2af6b9d5 MH |
848 | hcon = hci_connect(hdev, ACL_LINK, dst, |
849 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
850 | if (!hcon) |
851 | goto done; | |
852 | ||
853 | conn = l2cap_conn_add(hcon, 0); | |
854 | if (!conn) { | |
855 | hci_conn_put(hcon); | |
856 | goto done; | |
857 | } | |
858 | ||
859 | err = 0; | |
860 | ||
861 | /* Update source addr of the socket */ | |
862 | bacpy(src, conn->src); | |
863 | ||
864 | l2cap_chan_add(conn, sk, NULL); | |
865 | ||
866 | sk->sk_state = BT_CONNECT; | |
867 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
868 | ||
869 | if (hcon->state == BT_CONNECTED) { | |
79d554a6 | 870 | if (sk->sk_type != SOCK_SEQPACKET) { |
1da177e4 LT |
871 | l2cap_sock_clear_timer(sk); |
872 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
873 | } else |
874 | l2cap_do_start(sk); | |
1da177e4 LT |
875 | } |
876 | ||
877 | done: | |
878 | hci_dev_unlock_bh(hdev); | |
879 | hci_dev_put(hdev); | |
880 | return err; | |
881 | } | |
882 | ||
883 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
884 | { | |
885 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
886 | struct sock *sk = sock->sk; | |
887 | int err = 0; | |
888 | ||
889 | lock_sock(sk); | |
890 | ||
891 | BT_DBG("sk %p", sk); | |
892 | ||
893 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_l2)) { | |
894 | err = -EINVAL; | |
895 | goto done; | |
896 | } | |
897 | ||
898 | if (sk->sk_type == SOCK_SEQPACKET && !la->l2_psm) { | |
899 | err = -EINVAL; | |
900 | goto done; | |
901 | } | |
902 | ||
903 | switch(sk->sk_state) { | |
904 | case BT_CONNECT: | |
905 | case BT_CONNECT2: | |
906 | case BT_CONFIG: | |
907 | /* Already connecting */ | |
908 | goto wait; | |
909 | ||
910 | case BT_CONNECTED: | |
911 | /* Already connected */ | |
912 | goto done; | |
913 | ||
914 | case BT_OPEN: | |
915 | case BT_BOUND: | |
916 | /* Can connect */ | |
917 | break; | |
918 | ||
919 | default: | |
920 | err = -EBADFD; | |
921 | goto done; | |
922 | } | |
923 | ||
924 | /* Set destination address and psm */ | |
925 | bacpy(&bt_sk(sk)->dst, &la->l2_bdaddr); | |
926 | l2cap_pi(sk)->psm = la->l2_psm; | |
927 | ||
928 | if ((err = l2cap_do_connect(sk))) | |
929 | goto done; | |
930 | ||
931 | wait: | |
932 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
933 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
934 | done: | |
935 | release_sock(sk); | |
936 | return err; | |
937 | } | |
938 | ||
939 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
940 | { | |
941 | struct sock *sk = sock->sk; | |
942 | int err = 0; | |
943 | ||
944 | BT_DBG("sk %p backlog %d", sk, backlog); | |
945 | ||
946 | lock_sock(sk); | |
947 | ||
948 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
949 | err = -EBADFD; | |
950 | goto done; | |
951 | } | |
952 | ||
953 | if (!l2cap_pi(sk)->psm) { | |
954 | bdaddr_t *src = &bt_sk(sk)->src; | |
955 | u16 psm; | |
956 | ||
957 | err = -EINVAL; | |
958 | ||
959 | write_lock_bh(&l2cap_sk_list.lock); | |
960 | ||
961 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
6dc0c208 | 962 | if (!__l2cap_get_sock_by_addr(htobs(psm), src)) { |
1da177e4 LT |
963 | l2cap_pi(sk)->psm = htobs(psm); |
964 | l2cap_pi(sk)->sport = htobs(psm); | |
965 | err = 0; | |
966 | break; | |
967 | } | |
968 | ||
969 | write_unlock_bh(&l2cap_sk_list.lock); | |
970 | ||
971 | if (err < 0) | |
972 | goto done; | |
973 | } | |
974 | ||
975 | sk->sk_max_ack_backlog = backlog; | |
976 | sk->sk_ack_backlog = 0; | |
977 | sk->sk_state = BT_LISTEN; | |
978 | ||
979 | done: | |
980 | release_sock(sk); | |
981 | return err; | |
982 | } | |
983 | ||
984 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
985 | { | |
986 | DECLARE_WAITQUEUE(wait, current); | |
987 | struct sock *sk = sock->sk, *nsk; | |
988 | long timeo; | |
989 | int err = 0; | |
990 | ||
fcc70d5f | 991 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
992 | |
993 | if (sk->sk_state != BT_LISTEN) { | |
994 | err = -EBADFD; | |
995 | goto done; | |
996 | } | |
997 | ||
998 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
999 | ||
1000 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1001 | ||
1002 | /* Wait for an incoming connection. (wake-one). */ | |
1003 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
1004 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
1005 | set_current_state(TASK_INTERRUPTIBLE); | |
1006 | if (!timeo) { | |
1007 | err = -EAGAIN; | |
1008 | break; | |
1009 | } | |
1010 | ||
1011 | release_sock(sk); | |
1012 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1013 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1014 | |
1015 | if (sk->sk_state != BT_LISTEN) { | |
1016 | err = -EBADFD; | |
1017 | break; | |
1018 | } | |
1019 | ||
1020 | if (signal_pending(current)) { | |
1021 | err = sock_intr_errno(timeo); | |
1022 | break; | |
1023 | } | |
1024 | } | |
1025 | set_current_state(TASK_RUNNING); | |
1026 | remove_wait_queue(sk->sk_sleep, &wait); | |
1027 | ||
1028 | if (err) | |
1029 | goto done; | |
1030 | ||
1031 | newsock->state = SS_CONNECTED; | |
1032 | ||
1033 | BT_DBG("new socket %p", nsk); | |
1034 | ||
1035 | done: | |
1036 | release_sock(sk); | |
1037 | return err; | |
1038 | } | |
1039 | ||
1040 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1041 | { | |
1042 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1043 | struct sock *sk = sock->sk; | |
1044 | ||
1045 | BT_DBG("sock %p, sk %p", sock, sk); | |
1046 | ||
1047 | addr->sa_family = AF_BLUETOOTH; | |
1048 | *len = sizeof(struct sockaddr_l2); | |
1049 | ||
1050 | if (peer) | |
1051 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); | |
1052 | else | |
1053 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); | |
1054 | ||
1055 | la->l2_psm = l2cap_pi(sk)->psm; | |
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len) | |
1060 | { | |
1061 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1062 | struct sk_buff *skb, **frag; | |
1063 | int err, hlen, count, sent=0; | |
1064 | struct l2cap_hdr *lh; | |
1065 | ||
1066 | BT_DBG("sk %p len %d", sk, len); | |
1067 | ||
1068 | /* First fragment (with L2CAP header) */ | |
1069 | if (sk->sk_type == SOCK_DGRAM) | |
1070 | hlen = L2CAP_HDR_SIZE + 2; | |
1071 | else | |
1072 | hlen = L2CAP_HDR_SIZE; | |
1073 | ||
1074 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1075 | ||
1076 | skb = bt_skb_send_alloc(sk, hlen + count, | |
1077 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1078 | if (!skb) | |
1079 | return err; | |
1080 | ||
1081 | /* Create L2CAP header */ | |
1082 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
1083 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
1084 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1da177e4 LT |
1085 | |
1086 | if (sk->sk_type == SOCK_DGRAM) | |
8e036fc3 | 1087 | put_unaligned(l2cap_pi(sk)->psm, (__le16 *) skb_put(skb, 2)); |
1da177e4 LT |
1088 | |
1089 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
1090 | err = -EFAULT; | |
1091 | goto fail; | |
1092 | } | |
1093 | ||
1094 | sent += count; | |
1095 | len -= count; | |
1096 | ||
1097 | /* Continuation fragments (no L2CAP header) */ | |
1098 | frag = &skb_shinfo(skb)->frag_list; | |
1099 | while (len) { | |
1100 | count = min_t(unsigned int, conn->mtu, len); | |
1101 | ||
1102 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1103 | if (!*frag) | |
1104 | goto fail; | |
8e87d142 | 1105 | |
1da177e4 LT |
1106 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) { |
1107 | err = -EFAULT; | |
1108 | goto fail; | |
1109 | } | |
1110 | ||
1111 | sent += count; | |
1112 | len -= count; | |
1113 | ||
1114 | frag = &(*frag)->next; | |
1115 | } | |
1116 | ||
1117 | if ((err = hci_send_acl(conn->hcon, skb, 0)) < 0) | |
1118 | goto fail; | |
1119 | ||
1120 | return sent; | |
1121 | ||
1122 | fail: | |
1123 | kfree_skb(skb); | |
1124 | return err; | |
1125 | } | |
1126 | ||
1127 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
1128 | { | |
1129 | struct sock *sk = sock->sk; | |
1130 | int err = 0; | |
1131 | ||
1132 | BT_DBG("sock %p, sk %p", sock, sk); | |
1133 | ||
c1cbe4b7 BL |
1134 | err = sock_error(sk); |
1135 | if (err) | |
1136 | return err; | |
1da177e4 LT |
1137 | |
1138 | if (msg->msg_flags & MSG_OOB) | |
1139 | return -EOPNOTSUPP; | |
1140 | ||
1141 | /* Check outgoing MTU */ | |
1142 | if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu) | |
1143 | return -EINVAL; | |
1144 | ||
1145 | lock_sock(sk); | |
1146 | ||
1147 | if (sk->sk_state == BT_CONNECTED) | |
1148 | err = l2cap_do_send(sk, msg, len); | |
1149 | else | |
1150 | err = -ENOTCONN; | |
1151 | ||
1152 | release_sock(sk); | |
1153 | return err; | |
1154 | } | |
1155 | ||
f66dc81f MH |
1156 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1157 | { | |
1158 | struct sock *sk = sock->sk; | |
1159 | ||
1160 | lock_sock(sk); | |
1161 | ||
1162 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1163 | struct l2cap_conn_rsp rsp; | |
1164 | ||
1165 | sk->sk_state = BT_CONFIG; | |
1166 | ||
1167 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1168 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1169 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1170 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1171 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1172 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1173 | ||
1174 | release_sock(sk); | |
1175 | return 0; | |
1176 | } | |
1177 | ||
1178 | release_sock(sk); | |
1179 | ||
1180 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1181 | } | |
1182 | ||
d58daf42 | 1183 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen) |
1da177e4 LT |
1184 | { |
1185 | struct sock *sk = sock->sk; | |
1186 | struct l2cap_options opts; | |
1187 | int err = 0, len; | |
1188 | u32 opt; | |
1189 | ||
1190 | BT_DBG("sk %p", sk); | |
1191 | ||
1192 | lock_sock(sk); | |
1193 | ||
1194 | switch (optname) { | |
1195 | case L2CAP_OPTIONS: | |
0878b666 MH |
1196 | opts.imtu = l2cap_pi(sk)->imtu; |
1197 | opts.omtu = l2cap_pi(sk)->omtu; | |
1198 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
6464f35f | 1199 | opts.mode = L2CAP_MODE_BASIC; |
0878b666 | 1200 | |
1da177e4 LT |
1201 | len = min_t(unsigned int, sizeof(opts), optlen); |
1202 | if (copy_from_user((char *) &opts, optval, len)) { | |
1203 | err = -EFAULT; | |
1204 | break; | |
1205 | } | |
0878b666 | 1206 | |
1da177e4 LT |
1207 | l2cap_pi(sk)->imtu = opts.imtu; |
1208 | l2cap_pi(sk)->omtu = opts.omtu; | |
1209 | break; | |
1210 | ||
1211 | case L2CAP_LM: | |
1212 | if (get_user(opt, (u32 __user *) optval)) { | |
1213 | err = -EFAULT; | |
1214 | break; | |
1215 | } | |
1216 | ||
2af6b9d5 MH |
1217 | if (opt & L2CAP_LM_AUTH) |
1218 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
1219 | if (opt & L2CAP_LM_ENCRYPT) | |
1220 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
1221 | if (opt & L2CAP_LM_SECURE) | |
1222 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
1223 | ||
1224 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
1225 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
1226 | break; |
1227 | ||
1228 | default: | |
1229 | err = -ENOPROTOOPT; | |
1230 | break; | |
1231 | } | |
1232 | ||
1233 | release_sock(sk); | |
1234 | return err; | |
1235 | } | |
1236 | ||
d58daf42 MH |
1237 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) |
1238 | { | |
1239 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
1240 | struct bt_security sec; |
1241 | int len, err = 0; | |
f66dc81f | 1242 | u32 opt; |
d58daf42 MH |
1243 | |
1244 | BT_DBG("sk %p", sk); | |
1245 | ||
1246 | if (level == SOL_L2CAP) | |
1247 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
1248 | ||
1249 | lock_sock(sk); | |
1250 | ||
1251 | switch (optname) { | |
2af6b9d5 MH |
1252 | case BT_SECURITY: |
1253 | sec.level = BT_SECURITY_LOW; | |
1254 | ||
1255 | len = min_t(unsigned int, sizeof(sec), optlen); | |
1256 | if (copy_from_user((char *) &sec, optval, len)) { | |
1257 | err = -EFAULT; | |
1258 | break; | |
1259 | } | |
1260 | ||
1261 | if (sec.level < BT_SECURITY_LOW || | |
1262 | sec.level > BT_SECURITY_HIGH) { | |
1263 | err = -EINVAL; | |
1264 | break; | |
1265 | } | |
1266 | ||
1267 | l2cap_pi(sk)->sec_level = sec.level; | |
1268 | break; | |
1269 | ||
f66dc81f MH |
1270 | case BT_DEFER_SETUP: |
1271 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1272 | err = -EINVAL; | |
1273 | break; | |
1274 | } | |
1275 | ||
1276 | if (get_user(opt, (u32 __user *) optval)) { | |
1277 | err = -EFAULT; | |
1278 | break; | |
1279 | } | |
1280 | ||
1281 | bt_sk(sk)->defer_setup = opt; | |
1282 | break; | |
1283 | ||
d58daf42 MH |
1284 | default: |
1285 | err = -ENOPROTOOPT; | |
1286 | break; | |
1287 | } | |
1288 | ||
1289 | release_sock(sk); | |
1290 | return err; | |
1291 | } | |
1292 | ||
1293 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
1294 | { |
1295 | struct sock *sk = sock->sk; | |
1296 | struct l2cap_options opts; | |
1297 | struct l2cap_conninfo cinfo; | |
1298 | int len, err = 0; | |
2af6b9d5 | 1299 | u32 opt; |
1da177e4 LT |
1300 | |
1301 | BT_DBG("sk %p", sk); | |
1302 | ||
1303 | if (get_user(len, optlen)) | |
1304 | return -EFAULT; | |
1305 | ||
1306 | lock_sock(sk); | |
1307 | ||
1308 | switch (optname) { | |
1309 | case L2CAP_OPTIONS: | |
1310 | opts.imtu = l2cap_pi(sk)->imtu; | |
1311 | opts.omtu = l2cap_pi(sk)->omtu; | |
1312 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
6464f35f | 1313 | opts.mode = L2CAP_MODE_BASIC; |
1da177e4 LT |
1314 | |
1315 | len = min_t(unsigned int, len, sizeof(opts)); | |
1316 | if (copy_to_user(optval, (char *) &opts, len)) | |
1317 | err = -EFAULT; | |
1318 | ||
1319 | break; | |
1320 | ||
1321 | case L2CAP_LM: | |
2af6b9d5 MH |
1322 | switch (l2cap_pi(sk)->sec_level) { |
1323 | case BT_SECURITY_LOW: | |
1324 | opt = L2CAP_LM_AUTH; | |
1325 | break; | |
1326 | case BT_SECURITY_MEDIUM: | |
1327 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
1328 | break; | |
1329 | case BT_SECURITY_HIGH: | |
1330 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
1331 | L2CAP_LM_SECURE; | |
1332 | break; | |
1333 | default: | |
1334 | opt = 0; | |
1335 | break; | |
1336 | } | |
1337 | ||
1338 | if (l2cap_pi(sk)->role_switch) | |
1339 | opt |= L2CAP_LM_MASTER; | |
1340 | ||
1341 | if (l2cap_pi(sk)->force_reliable) | |
1342 | opt |= L2CAP_LM_RELIABLE; | |
1343 | ||
1344 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
1345 | err = -EFAULT; |
1346 | break; | |
1347 | ||
1348 | case L2CAP_CONNINFO: | |
f66dc81f MH |
1349 | if (sk->sk_state != BT_CONNECTED && |
1350 | !(sk->sk_state == BT_CONNECT2 && | |
1351 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
1352 | err = -ENOTCONN; |
1353 | break; | |
1354 | } | |
1355 | ||
1356 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
1357 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
1358 | ||
1359 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
1360 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
1361 | err = -EFAULT; | |
1362 | ||
1363 | break; | |
1364 | ||
1365 | default: | |
1366 | err = -ENOPROTOOPT; | |
1367 | break; | |
1368 | } | |
1369 | ||
1370 | release_sock(sk); | |
1371 | return err; | |
1372 | } | |
1373 | ||
d58daf42 MH |
1374 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
1375 | { | |
1376 | struct sock *sk = sock->sk; | |
2af6b9d5 | 1377 | struct bt_security sec; |
d58daf42 MH |
1378 | int len, err = 0; |
1379 | ||
1380 | BT_DBG("sk %p", sk); | |
1381 | ||
1382 | if (level == SOL_L2CAP) | |
1383 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
1384 | ||
1385 | if (get_user(len, optlen)) | |
1386 | return -EFAULT; | |
1387 | ||
1388 | lock_sock(sk); | |
1389 | ||
1390 | switch (optname) { | |
2af6b9d5 MH |
1391 | case BT_SECURITY: |
1392 | sec.level = l2cap_pi(sk)->sec_level; | |
1393 | ||
1394 | len = min_t(unsigned int, len, sizeof(sec)); | |
1395 | if (copy_to_user(optval, (char *) &sec, len)) | |
1396 | err = -EFAULT; | |
1397 | ||
1398 | break; | |
1399 | ||
f66dc81f MH |
1400 | case BT_DEFER_SETUP: |
1401 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1402 | err = -EINVAL; | |
1403 | break; | |
1404 | } | |
1405 | ||
1406 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
1407 | err = -EFAULT; | |
1408 | ||
1409 | break; | |
1410 | ||
d58daf42 MH |
1411 | default: |
1412 | err = -ENOPROTOOPT; | |
1413 | break; | |
1414 | } | |
1415 | ||
1416 | release_sock(sk); | |
1417 | return err; | |
1418 | } | |
1419 | ||
1da177e4 LT |
1420 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1421 | { | |
1422 | struct sock *sk = sock->sk; | |
1423 | int err = 0; | |
1424 | ||
1425 | BT_DBG("sock %p, sk %p", sock, sk); | |
1426 | ||
1427 | if (!sk) | |
1428 | return 0; | |
1429 | ||
1430 | lock_sock(sk); | |
1431 | if (!sk->sk_shutdown) { | |
1432 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1433 | l2cap_sock_clear_timer(sk); | |
1434 | __l2cap_sock_close(sk, 0); | |
1435 | ||
1436 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
1437 | err = bt_sock_wait_state(sk, BT_CLOSED, |
1438 | sk->sk_lingertime); | |
1da177e4 LT |
1439 | } |
1440 | release_sock(sk); | |
1441 | return err; | |
1442 | } | |
1443 | ||
1444 | static int l2cap_sock_release(struct socket *sock) | |
1445 | { | |
1446 | struct sock *sk = sock->sk; | |
1447 | int err; | |
1448 | ||
1449 | BT_DBG("sock %p, sk %p", sock, sk); | |
1450 | ||
1451 | if (!sk) | |
1452 | return 0; | |
1453 | ||
1454 | err = l2cap_sock_shutdown(sock, 2); | |
1455 | ||
1456 | sock_orphan(sk); | |
1457 | l2cap_sock_kill(sk); | |
1458 | return err; | |
1459 | } | |
1460 | ||
1da177e4 LT |
1461 | static void l2cap_chan_ready(struct sock *sk) |
1462 | { | |
1463 | struct sock *parent = bt_sk(sk)->parent; | |
1464 | ||
1465 | BT_DBG("sk %p, parent %p", sk, parent); | |
1466 | ||
1467 | l2cap_pi(sk)->conf_state = 0; | |
1468 | l2cap_sock_clear_timer(sk); | |
1469 | ||
1470 | if (!parent) { | |
1471 | /* Outgoing channel. | |
1472 | * Wake up socket sleeping on connect. | |
1473 | */ | |
1474 | sk->sk_state = BT_CONNECTED; | |
1475 | sk->sk_state_change(sk); | |
1476 | } else { | |
1477 | /* Incoming channel. | |
1478 | * Wake up socket sleeping on accept. | |
1479 | */ | |
1480 | parent->sk_data_ready(parent, 0); | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | /* Copy frame to all raw sockets on that connection */ | |
1485 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
1486 | { | |
1487 | struct l2cap_chan_list *l = &conn->chan_list; | |
1488 | struct sk_buff *nskb; | |
1489 | struct sock * sk; | |
1490 | ||
1491 | BT_DBG("conn %p", conn); | |
1492 | ||
1493 | read_lock(&l->lock); | |
1494 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1495 | if (sk->sk_type != SOCK_RAW) | |
1496 | continue; | |
1497 | ||
1498 | /* Don't send frame to the socket it came from */ | |
1499 | if (skb->sk == sk) | |
1500 | continue; | |
1501 | ||
1502 | if (!(nskb = skb_clone(skb, GFP_ATOMIC))) | |
1503 | continue; | |
1504 | ||
1505 | if (sock_queue_rcv_skb(sk, nskb)) | |
1506 | kfree_skb(nskb); | |
1507 | } | |
1508 | read_unlock(&l->lock); | |
1509 | } | |
1510 | ||
1511 | /* ---- L2CAP signalling commands ---- */ | |
1512 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
1513 | u8 code, u8 ident, u16 dlen, void *data) | |
1514 | { | |
1515 | struct sk_buff *skb, **frag; | |
1516 | struct l2cap_cmd_hdr *cmd; | |
1517 | struct l2cap_hdr *lh; | |
1518 | int len, count; | |
1519 | ||
1520 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", conn, code, ident, dlen); | |
1521 | ||
1522 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
1523 | count = min_t(unsigned int, conn->mtu, len); | |
1524 | ||
1525 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
1526 | if (!skb) | |
1527 | return NULL; | |
1528 | ||
1529 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
1530 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
1531 | lh->cid = cpu_to_le16(0x0001); | |
1da177e4 LT |
1532 | |
1533 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
1534 | cmd->code = code; | |
1535 | cmd->ident = ident; | |
aca3192c | 1536 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
1537 | |
1538 | if (dlen) { | |
1539 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
1540 | memcpy(skb_put(skb, count), data, count); | |
1541 | data += count; | |
1542 | } | |
1543 | ||
1544 | len -= skb->len; | |
1545 | ||
1546 | /* Continuation fragments (no L2CAP header) */ | |
1547 | frag = &skb_shinfo(skb)->frag_list; | |
1548 | while (len) { | |
1549 | count = min_t(unsigned int, conn->mtu, len); | |
1550 | ||
1551 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
1552 | if (!*frag) | |
1553 | goto fail; | |
1554 | ||
1555 | memcpy(skb_put(*frag, count), data, count); | |
1556 | ||
1557 | len -= count; | |
1558 | data += count; | |
1559 | ||
1560 | frag = &(*frag)->next; | |
1561 | } | |
1562 | ||
1563 | return skb; | |
1564 | ||
1565 | fail: | |
1566 | kfree_skb(skb); | |
1567 | return NULL; | |
1568 | } | |
1569 | ||
1570 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
1571 | { | |
1572 | struct l2cap_conf_opt *opt = *ptr; | |
1573 | int len; | |
1574 | ||
1575 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
1576 | *ptr += len; | |
1577 | ||
1578 | *type = opt->type; | |
1579 | *olen = opt->len; | |
1580 | ||
1581 | switch (opt->len) { | |
1582 | case 1: | |
1583 | *val = *((u8 *) opt->val); | |
1584 | break; | |
1585 | ||
1586 | case 2: | |
861d6882 | 1587 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
1588 | break; |
1589 | ||
1590 | case 4: | |
861d6882 | 1591 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
1592 | break; |
1593 | ||
1594 | default: | |
1595 | *val = (unsigned long) opt->val; | |
1596 | break; | |
1597 | } | |
1598 | ||
1599 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
1600 | return len; | |
1601 | } | |
1602 | ||
1da177e4 LT |
1603 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
1604 | { | |
1605 | struct l2cap_conf_opt *opt = *ptr; | |
1606 | ||
1607 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
1608 | ||
1609 | opt->type = type; | |
1610 | opt->len = len; | |
1611 | ||
1612 | switch (len) { | |
1613 | case 1: | |
1614 | *((u8 *) opt->val) = val; | |
1615 | break; | |
1616 | ||
1617 | case 2: | |
8e036fc3 | 1618 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
1619 | break; |
1620 | ||
1621 | case 4: | |
8e036fc3 | 1622 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
1623 | break; |
1624 | ||
1625 | default: | |
1626 | memcpy(opt->val, (void *) val, len); | |
1627 | break; | |
1628 | } | |
1629 | ||
1630 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
1631 | } | |
1632 | ||
1633 | static int l2cap_build_conf_req(struct sock *sk, void *data) | |
1634 | { | |
1635 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1636 | struct l2cap_conf_req *req = data; | |
1637 | void *ptr = req->data; | |
1638 | ||
1639 | BT_DBG("sk %p", sk); | |
1640 | ||
1641 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
1642 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
1643 | ||
1644 | /* FIXME: Need actual value of the flush timeout */ | |
1645 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
1646 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
1647 | ||
aca3192c YH |
1648 | req->dcid = cpu_to_le16(pi->dcid); |
1649 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
1650 | |
1651 | return ptr - data; | |
1652 | } | |
1653 | ||
5dee9e7c | 1654 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
1655 | { |
1656 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
1657 | struct l2cap_conf_rsp *rsp = data; |
1658 | void *ptr = rsp->data; | |
1659 | void *req = pi->conf_req; | |
1660 | int len = pi->conf_len; | |
1661 | int type, hint, olen; | |
1662 | unsigned long val; | |
6464f35f | 1663 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 1664 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 1665 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 1666 | |
5dee9e7c | 1667 | BT_DBG("sk %p", sk); |
820ae1b8 | 1668 | |
5dee9e7c MH |
1669 | while (len >= L2CAP_CONF_OPT_SIZE) { |
1670 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 1671 | |
5dee9e7c MH |
1672 | hint = type & 0x80; |
1673 | type &= 0x7f; | |
1674 | ||
1675 | switch (type) { | |
1676 | case L2CAP_CONF_MTU: | |
861d6882 | 1677 | mtu = val; |
5dee9e7c MH |
1678 | break; |
1679 | ||
1680 | case L2CAP_CONF_FLUSH_TO: | |
1681 | pi->flush_to = val; | |
1682 | break; | |
1683 | ||
1684 | case L2CAP_CONF_QOS: | |
1685 | break; | |
1686 | ||
6464f35f MH |
1687 | case L2CAP_CONF_RFC: |
1688 | if (olen == sizeof(rfc)) | |
1689 | memcpy(&rfc, (void *) val, olen); | |
1690 | break; | |
1691 | ||
5dee9e7c MH |
1692 | default: |
1693 | if (hint) | |
1694 | break; | |
1695 | ||
1696 | result = L2CAP_CONF_UNKNOWN; | |
1697 | *((u8 *) ptr++) = type; | |
1698 | break; | |
1699 | } | |
1700 | } | |
1701 | ||
1702 | if (result == L2CAP_CONF_SUCCESS) { | |
1703 | /* Configure output options and let the other side know | |
1704 | * which ones we don't like. */ | |
1705 | ||
6464f35f MH |
1706 | if (rfc.mode == L2CAP_MODE_BASIC) { |
1707 | if (mtu < pi->omtu) | |
1708 | result = L2CAP_CONF_UNACCEPT; | |
1709 | else { | |
1710 | pi->omtu = mtu; | |
1711 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
1712 | } | |
1713 | ||
1714 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
1715 | } else { | |
5dee9e7c | 1716 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 1717 | |
6464f35f MH |
1718 | memset(&rfc, 0, sizeof(rfc)); |
1719 | rfc.mode = L2CAP_MODE_BASIC; | |
1720 | ||
1721 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
1722 | sizeof(rfc), (unsigned long) &rfc); | |
1723 | } | |
5dee9e7c MH |
1724 | } |
1725 | ||
1726 | rsp->scid = cpu_to_le16(pi->dcid); | |
1727 | rsp->result = cpu_to_le16(result); | |
1728 | rsp->flags = cpu_to_le16(0x0000); | |
1729 | ||
1730 | return ptr - data; | |
1da177e4 LT |
1731 | } |
1732 | ||
5dee9e7c | 1733 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
1734 | { |
1735 | struct l2cap_conf_rsp *rsp = data; | |
1736 | void *ptr = rsp->data; | |
1da177e4 | 1737 | |
5dee9e7c | 1738 | BT_DBG("sk %p", sk); |
1da177e4 | 1739 | |
aca3192c | 1740 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 1741 | rsp->result = cpu_to_le16(result); |
aca3192c | 1742 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
1743 | |
1744 | return ptr - data; | |
1745 | } | |
1746 | ||
4e8402a3 MH |
1747 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1748 | { | |
1749 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
1750 | ||
1751 | if (rej->reason != 0x0000) | |
1752 | return 0; | |
1753 | ||
1754 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
1755 | cmd->ident == conn->info_ident) { | |
1756 | conn->info_ident = 0; | |
1757 | del_timer(&conn->info_timer); | |
1758 | l2cap_conn_start(conn); | |
1759 | } | |
1760 | ||
1761 | return 0; | |
1762 | } | |
1763 | ||
1da177e4 LT |
1764 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1765 | { | |
1766 | struct l2cap_chan_list *list = &conn->chan_list; | |
1767 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
1768 | struct l2cap_conn_rsp rsp; | |
1769 | struct sock *sk, *parent; | |
e7c29cb1 | 1770 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
1771 | |
1772 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 1773 | __le16 psm = req->psm; |
1da177e4 LT |
1774 | |
1775 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
1776 | ||
1777 | /* Check if we have socket listening on psm */ | |
1778 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
1779 | if (!parent) { | |
1780 | result = L2CAP_CR_BAD_PSM; | |
1781 | goto sendresp; | |
1782 | } | |
1783 | ||
e7c29cb1 MH |
1784 | /* Check if the ACL is secure enough (if not SDP) */ |
1785 | if (psm != cpu_to_le16(0x0001) && | |
1786 | !hci_conn_check_link_mode(conn->hcon)) { | |
1787 | result = L2CAP_CR_SEC_BLOCK; | |
1788 | goto response; | |
1789 | } | |
1790 | ||
1da177e4 LT |
1791 | result = L2CAP_CR_NO_MEM; |
1792 | ||
1793 | /* Check for backlog size */ | |
1794 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 1795 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
1796 | goto response; |
1797 | } | |
1798 | ||
3b1e0a65 | 1799 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
1800 | if (!sk) |
1801 | goto response; | |
1802 | ||
fd1278d7 | 1803 | write_lock_bh(&list->lock); |
1da177e4 LT |
1804 | |
1805 | /* Check if we already have channel with that dcid */ | |
1806 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 1807 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1808 | sock_set_flag(sk, SOCK_ZAPPED); |
1809 | l2cap_sock_kill(sk); | |
1810 | goto response; | |
1811 | } | |
1812 | ||
1813 | hci_conn_hold(conn->hcon); | |
1814 | ||
1815 | l2cap_sock_init(sk, parent); | |
1816 | bacpy(&bt_sk(sk)->src, conn->src); | |
1817 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
1818 | l2cap_pi(sk)->psm = psm; | |
1819 | l2cap_pi(sk)->dcid = scid; | |
1820 | ||
1821 | __l2cap_chan_add(conn, sk, parent); | |
1822 | dcid = l2cap_pi(sk)->scid; | |
1823 | ||
1824 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1825 | ||
1da177e4 LT |
1826 | l2cap_pi(sk)->ident = cmd->ident; |
1827 | ||
79d554a6 | 1828 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
2af6b9d5 | 1829 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
1830 | if (bt_sk(sk)->defer_setup) { |
1831 | sk->sk_state = BT_CONNECT2; | |
1832 | result = L2CAP_CR_PEND; | |
1833 | status = L2CAP_CS_AUTHOR_PEND; | |
1834 | parent->sk_data_ready(parent, 0); | |
1835 | } else { | |
1836 | sk->sk_state = BT_CONFIG; | |
1837 | result = L2CAP_CR_SUCCESS; | |
1838 | status = L2CAP_CS_NO_INFO; | |
1839 | } | |
79d554a6 MH |
1840 | } else { |
1841 | sk->sk_state = BT_CONNECT2; | |
1842 | result = L2CAP_CR_PEND; | |
1843 | status = L2CAP_CS_AUTHEN_PEND; | |
1844 | } | |
1845 | } else { | |
1846 | sk->sk_state = BT_CONNECT2; | |
1847 | result = L2CAP_CR_PEND; | |
1848 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
1849 | } |
1850 | ||
fd1278d7 | 1851 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1852 | |
1853 | response: | |
1854 | bh_unlock_sock(parent); | |
1855 | ||
1856 | sendresp: | |
aca3192c YH |
1857 | rsp.scid = cpu_to_le16(scid); |
1858 | rsp.dcid = cpu_to_le16(dcid); | |
1859 | rsp.result = cpu_to_le16(result); | |
1860 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 1861 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
1862 | |
1863 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
1864 | struct l2cap_info_req info; | |
1865 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
1866 | ||
1867 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
1868 | conn->info_ident = l2cap_get_ident(conn); | |
1869 | ||
1870 | mod_timer(&conn->info_timer, jiffies + | |
1871 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
1872 | ||
1873 | l2cap_send_cmd(conn, conn->info_ident, | |
1874 | L2CAP_INFO_REQ, sizeof(info), &info); | |
1875 | } | |
1876 | ||
1da177e4 LT |
1877 | return 0; |
1878 | } | |
1879 | ||
1880 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1881 | { | |
1882 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
1883 | u16 scid, dcid, result, status; | |
1884 | struct sock *sk; | |
1885 | u8 req[128]; | |
1886 | ||
1887 | scid = __le16_to_cpu(rsp->scid); | |
1888 | dcid = __le16_to_cpu(rsp->dcid); | |
1889 | result = __le16_to_cpu(rsp->result); | |
1890 | status = __le16_to_cpu(rsp->status); | |
1891 | ||
1892 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
1893 | ||
1894 | if (scid) { | |
1895 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1896 | return 0; | |
1897 | } else { | |
1898 | if (!(sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident))) | |
1899 | return 0; | |
1900 | } | |
1901 | ||
1902 | switch (result) { | |
1903 | case L2CAP_CR_SUCCESS: | |
1904 | sk->sk_state = BT_CONFIG; | |
1905 | l2cap_pi(sk)->ident = 0; | |
1906 | l2cap_pi(sk)->dcid = dcid; | |
1907 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
1908 | ||
1909 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1910 | l2cap_build_conf_req(sk, req), req); | |
1911 | break; | |
1912 | ||
1913 | case L2CAP_CR_PEND: | |
1914 | break; | |
1915 | ||
1916 | default: | |
1917 | l2cap_chan_del(sk, ECONNREFUSED); | |
1918 | break; | |
1919 | } | |
1920 | ||
1921 | bh_unlock_sock(sk); | |
1922 | return 0; | |
1923 | } | |
1924 | ||
88219a0f | 1925 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
1926 | { |
1927 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
1928 | u16 dcid, flags; | |
1929 | u8 rsp[64]; | |
1930 | struct sock *sk; | |
5dee9e7c | 1931 | int len; |
1da177e4 LT |
1932 | |
1933 | dcid = __le16_to_cpu(req->dcid); | |
1934 | flags = __le16_to_cpu(req->flags); | |
1935 | ||
1936 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
1937 | ||
1938 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
1939 | return -ENOENT; | |
1940 | ||
354f60a9 MH |
1941 | if (sk->sk_state == BT_DISCONN) |
1942 | goto unlock; | |
1943 | ||
5dee9e7c | 1944 | /* Reject if config buffer is too small. */ |
88219a0f | 1945 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
1946 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
1947 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
1948 | l2cap_build_conf_rsp(sk, rsp, | |
1949 | L2CAP_CONF_REJECT, flags), rsp); | |
1950 | goto unlock; | |
1951 | } | |
1952 | ||
1953 | /* Store config. */ | |
1954 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
1955 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
1956 | |
1957 | if (flags & 0x0001) { | |
1958 | /* Incomplete config. Send empty response. */ | |
1959 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
1960 | l2cap_build_conf_rsp(sk, rsp, |
1961 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
1962 | goto unlock; |
1963 | } | |
1964 | ||
1965 | /* Complete config. */ | |
5dee9e7c MH |
1966 | len = l2cap_parse_conf_req(sk, rsp); |
1967 | if (len < 0) | |
1da177e4 LT |
1968 | goto unlock; |
1969 | ||
5dee9e7c MH |
1970 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
1971 | ||
5dee9e7c MH |
1972 | /* Reset config buffer. */ |
1973 | l2cap_pi(sk)->conf_len = 0; | |
1974 | ||
876d9484 MH |
1975 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
1976 | goto unlock; | |
1977 | ||
1da177e4 LT |
1978 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
1979 | sk->sk_state = BT_CONNECTED; | |
1980 | l2cap_chan_ready(sk); | |
876d9484 MH |
1981 | goto unlock; |
1982 | } | |
1983 | ||
1984 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 1985 | u8 buf[64]; |
1da177e4 | 1986 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 1987 | l2cap_build_conf_req(sk, buf), buf); |
1da177e4 LT |
1988 | } |
1989 | ||
1990 | unlock: | |
1991 | bh_unlock_sock(sk); | |
1992 | return 0; | |
1993 | } | |
1994 | ||
1995 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1996 | { | |
1997 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
1998 | u16 scid, flags, result; | |
1999 | struct sock *sk; | |
2000 | ||
2001 | scid = __le16_to_cpu(rsp->scid); | |
2002 | flags = __le16_to_cpu(rsp->flags); | |
2003 | result = __le16_to_cpu(rsp->result); | |
2004 | ||
2005 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", scid, flags, result); | |
2006 | ||
2007 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
2008 | return 0; | |
2009 | ||
2010 | switch (result) { | |
2011 | case L2CAP_CONF_SUCCESS: | |
2012 | break; | |
2013 | ||
2014 | case L2CAP_CONF_UNACCEPT: | |
2015 | if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) { | |
2016 | char req[128]; | |
2017 | /* It does not make sense to adjust L2CAP parameters | |
2018 | * that are currently defined in the spec. We simply | |
2019 | * resend config request that we sent earlier. It is | |
2020 | * stupid, but it helps qualification testing which | |
2021 | * expects at least some response from us. */ | |
2022 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
2023 | l2cap_build_conf_req(sk, req), req); | |
2024 | goto done; | |
2025 | } | |
2026 | ||
8e87d142 | 2027 | default: |
1da177e4 | 2028 | sk->sk_state = BT_DISCONN; |
b1235d79 | 2029 | sk->sk_err = ECONNRESET; |
1da177e4 LT |
2030 | l2cap_sock_set_timer(sk, HZ * 5); |
2031 | { | |
2032 | struct l2cap_disconn_req req; | |
aca3192c YH |
2033 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
2034 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
2035 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
2036 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
2037 | } | |
2038 | goto done; | |
2039 | } | |
2040 | ||
2041 | if (flags & 0x01) | |
2042 | goto done; | |
2043 | ||
1da177e4 LT |
2044 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
2045 | ||
2046 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
2047 | sk->sk_state = BT_CONNECTED; | |
2048 | l2cap_chan_ready(sk); | |
2049 | } | |
2050 | ||
2051 | done: | |
2052 | bh_unlock_sock(sk); | |
2053 | return 0; | |
2054 | } | |
2055 | ||
2056 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2057 | { | |
2058 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
2059 | struct l2cap_disconn_rsp rsp; | |
2060 | u16 dcid, scid; | |
2061 | struct sock *sk; | |
2062 | ||
2063 | scid = __le16_to_cpu(req->scid); | |
2064 | dcid = __le16_to_cpu(req->dcid); | |
2065 | ||
2066 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
2067 | ||
2068 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
2069 | return 0; | |
2070 | ||
aca3192c YH |
2071 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
2072 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
2073 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
2074 | ||
2075 | sk->sk_shutdown = SHUTDOWN_MASK; | |
2076 | ||
2077 | l2cap_chan_del(sk, ECONNRESET); | |
2078 | bh_unlock_sock(sk); | |
2079 | ||
2080 | l2cap_sock_kill(sk); | |
2081 | return 0; | |
2082 | } | |
2083 | ||
2084 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2085 | { | |
2086 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
2087 | u16 dcid, scid; | |
2088 | struct sock *sk; | |
2089 | ||
2090 | scid = __le16_to_cpu(rsp->scid); | |
2091 | dcid = __le16_to_cpu(rsp->dcid); | |
2092 | ||
2093 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
2094 | ||
2095 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
2096 | return 0; | |
2097 | ||
2098 | l2cap_chan_del(sk, 0); | |
2099 | bh_unlock_sock(sk); | |
2100 | ||
2101 | l2cap_sock_kill(sk); | |
2102 | return 0; | |
2103 | } | |
2104 | ||
2105 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2106 | { | |
2107 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
2108 | u16 type; |
2109 | ||
2110 | type = __le16_to_cpu(req->type); | |
2111 | ||
2112 | BT_DBG("type 0x%4.4x", type); | |
2113 | ||
f0709e03 MH |
2114 | if (type == L2CAP_IT_FEAT_MASK) { |
2115 | u8 buf[8]; | |
2116 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
2117 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2118 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
2119 | put_unaligned(cpu_to_le32(l2cap_feat_mask), (__le32 *) rsp->data); | |
2120 | l2cap_send_cmd(conn, cmd->ident, | |
2121 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
2122 | } else { | |
2123 | struct l2cap_info_rsp rsp; | |
2124 | rsp.type = cpu_to_le16(type); | |
2125 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
2126 | l2cap_send_cmd(conn, cmd->ident, | |
2127 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
2128 | } | |
1da177e4 LT |
2129 | |
2130 | return 0; | |
2131 | } | |
2132 | ||
2133 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2134 | { | |
2135 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
2136 | u16 type, result; | |
2137 | ||
2138 | type = __le16_to_cpu(rsp->type); | |
2139 | result = __le16_to_cpu(rsp->result); | |
2140 | ||
2141 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
2142 | ||
4e8402a3 MH |
2143 | conn->info_ident = 0; |
2144 | ||
2145 | del_timer(&conn->info_timer); | |
2146 | ||
2147 | if (type == L2CAP_IT_FEAT_MASK) | |
83985319 | 2148 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 MH |
2149 | |
2150 | l2cap_conn_start(conn); | |
2151 | ||
1da177e4 LT |
2152 | return 0; |
2153 | } | |
2154 | ||
2155 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
2156 | { | |
2157 | u8 *data = skb->data; | |
2158 | int len = skb->len; | |
2159 | struct l2cap_cmd_hdr cmd; | |
2160 | int err = 0; | |
2161 | ||
2162 | l2cap_raw_recv(conn, skb); | |
2163 | ||
2164 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 2165 | u16 cmd_len; |
1da177e4 LT |
2166 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
2167 | data += L2CAP_CMD_HDR_SIZE; | |
2168 | len -= L2CAP_CMD_HDR_SIZE; | |
2169 | ||
88219a0f | 2170 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 2171 | |
88219a0f | 2172 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 2173 | |
88219a0f | 2174 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
2175 | BT_DBG("corrupted command"); |
2176 | break; | |
2177 | } | |
2178 | ||
2179 | switch (cmd.code) { | |
2180 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 2181 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
2182 | break; |
2183 | ||
2184 | case L2CAP_CONN_REQ: | |
2185 | err = l2cap_connect_req(conn, &cmd, data); | |
2186 | break; | |
2187 | ||
2188 | case L2CAP_CONN_RSP: | |
2189 | err = l2cap_connect_rsp(conn, &cmd, data); | |
2190 | break; | |
2191 | ||
2192 | case L2CAP_CONF_REQ: | |
88219a0f | 2193 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
2194 | break; |
2195 | ||
2196 | case L2CAP_CONF_RSP: | |
2197 | err = l2cap_config_rsp(conn, &cmd, data); | |
2198 | break; | |
2199 | ||
2200 | case L2CAP_DISCONN_REQ: | |
2201 | err = l2cap_disconnect_req(conn, &cmd, data); | |
2202 | break; | |
2203 | ||
2204 | case L2CAP_DISCONN_RSP: | |
2205 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
2206 | break; | |
2207 | ||
2208 | case L2CAP_ECHO_REQ: | |
88219a0f | 2209 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
2210 | break; |
2211 | ||
2212 | case L2CAP_ECHO_RSP: | |
2213 | break; | |
2214 | ||
2215 | case L2CAP_INFO_REQ: | |
2216 | err = l2cap_information_req(conn, &cmd, data); | |
2217 | break; | |
2218 | ||
2219 | case L2CAP_INFO_RSP: | |
2220 | err = l2cap_information_rsp(conn, &cmd, data); | |
2221 | break; | |
2222 | ||
2223 | default: | |
2224 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
2225 | err = -EINVAL; | |
2226 | break; | |
2227 | } | |
2228 | ||
2229 | if (err) { | |
2230 | struct l2cap_cmd_rej rej; | |
2231 | BT_DBG("error %d", err); | |
2232 | ||
2233 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 2234 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
2235 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
2236 | } | |
2237 | ||
88219a0f AV |
2238 | data += cmd_len; |
2239 | len -= cmd_len; | |
1da177e4 LT |
2240 | } |
2241 | ||
2242 | kfree_skb(skb); | |
2243 | } | |
2244 | ||
2245 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) | |
2246 | { | |
2247 | struct sock *sk; | |
2248 | ||
2249 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
2250 | if (!sk) { | |
2251 | BT_DBG("unknown cid 0x%4.4x", cid); | |
2252 | goto drop; | |
2253 | } | |
2254 | ||
2255 | BT_DBG("sk %p, len %d", sk, skb->len); | |
2256 | ||
2257 | if (sk->sk_state != BT_CONNECTED) | |
2258 | goto drop; | |
2259 | ||
2260 | if (l2cap_pi(sk)->imtu < skb->len) | |
2261 | goto drop; | |
2262 | ||
2263 | /* If socket recv buffers overflows we drop data here | |
2264 | * which is *bad* because L2CAP has to be reliable. | |
2265 | * But we don't have any other choice. L2CAP doesn't | |
2266 | * provide flow control mechanism. */ | |
2267 | ||
2268 | if (!sock_queue_rcv_skb(sk, skb)) | |
2269 | goto done; | |
2270 | ||
2271 | drop: | |
2272 | kfree_skb(skb); | |
2273 | ||
2274 | done: | |
0139418c MH |
2275 | if (sk) |
2276 | bh_unlock_sock(sk); | |
2277 | ||
1da177e4 LT |
2278 | return 0; |
2279 | } | |
2280 | ||
8e036fc3 | 2281 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
2282 | { |
2283 | struct sock *sk; | |
2284 | ||
2285 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
2286 | if (!sk) | |
2287 | goto drop; | |
2288 | ||
2289 | BT_DBG("sk %p, len %d", sk, skb->len); | |
2290 | ||
2291 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
2292 | goto drop; | |
2293 | ||
2294 | if (l2cap_pi(sk)->imtu < skb->len) | |
2295 | goto drop; | |
2296 | ||
2297 | if (!sock_queue_rcv_skb(sk, skb)) | |
2298 | goto done; | |
2299 | ||
2300 | drop: | |
2301 | kfree_skb(skb); | |
2302 | ||
2303 | done: | |
2304 | if (sk) bh_unlock_sock(sk); | |
2305 | return 0; | |
2306 | } | |
2307 | ||
2308 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
2309 | { | |
2310 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
2311 | u16 cid, len; |
2312 | __le16 psm; | |
1da177e4 LT |
2313 | |
2314 | skb_pull(skb, L2CAP_HDR_SIZE); | |
2315 | cid = __le16_to_cpu(lh->cid); | |
2316 | len = __le16_to_cpu(lh->len); | |
2317 | ||
2318 | BT_DBG("len %d, cid 0x%4.4x", len, cid); | |
2319 | ||
2320 | switch (cid) { | |
2321 | case 0x0001: | |
2322 | l2cap_sig_channel(conn, skb); | |
2323 | break; | |
2324 | ||
2325 | case 0x0002: | |
8e036fc3 | 2326 | psm = get_unaligned((__le16 *) skb->data); |
1da177e4 LT |
2327 | skb_pull(skb, 2); |
2328 | l2cap_conless_channel(conn, psm, skb); | |
2329 | break; | |
2330 | ||
2331 | default: | |
2332 | l2cap_data_channel(conn, cid, skb); | |
2333 | break; | |
2334 | } | |
2335 | } | |
2336 | ||
2337 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
2338 | ||
2339 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
2340 | { | |
2341 | int exact = 0, lm1 = 0, lm2 = 0; | |
2342 | register struct sock *sk; | |
2343 | struct hlist_node *node; | |
2344 | ||
2345 | if (type != ACL_LINK) | |
2346 | return 0; | |
2347 | ||
2348 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
2349 | ||
2350 | /* Find listening sockets and check their link_mode */ | |
2351 | read_lock(&l2cap_sk_list.lock); | |
2352 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
2353 | if (sk->sk_state != BT_LISTEN) | |
2354 | continue; | |
2355 | ||
2356 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
2357 | lm1 |= HCI_LM_ACCEPT; |
2358 | if (l2cap_pi(sk)->role_switch) | |
2359 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 2360 | exact++; |
2af6b9d5 MH |
2361 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
2362 | lm2 |= HCI_LM_ACCEPT; | |
2363 | if (l2cap_pi(sk)->role_switch) | |
2364 | lm2 |= HCI_LM_MASTER; | |
2365 | } | |
1da177e4 LT |
2366 | } |
2367 | read_unlock(&l2cap_sk_list.lock); | |
2368 | ||
2369 | return exact ? lm1 : lm2; | |
2370 | } | |
2371 | ||
2372 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
2373 | { | |
0139418c MH |
2374 | struct l2cap_conn *conn; |
2375 | ||
1da177e4 LT |
2376 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
2377 | ||
2378 | if (hcon->type != ACL_LINK) | |
2379 | return 0; | |
2380 | ||
2381 | if (!status) { | |
1da177e4 LT |
2382 | conn = l2cap_conn_add(hcon, status); |
2383 | if (conn) | |
2384 | l2cap_conn_ready(conn); | |
0139418c | 2385 | } else |
1da177e4 LT |
2386 | l2cap_conn_del(hcon, bt_err(status)); |
2387 | ||
2388 | return 0; | |
2389 | } | |
2390 | ||
2391 | static int l2cap_disconn_ind(struct hci_conn *hcon, u8 reason) | |
2392 | { | |
2393 | BT_DBG("hcon %p reason %d", hcon, reason); | |
2394 | ||
2395 | if (hcon->type != ACL_LINK) | |
2396 | return 0; | |
2397 | ||
2398 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 2399 | |
1da177e4 LT |
2400 | return 0; |
2401 | } | |
2402 | ||
8c1b2355 | 2403 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
2404 | { |
2405 | struct l2cap_chan_list *l; | |
0139418c | 2406 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 2407 | struct sock *sk; |
1da177e4 | 2408 | |
0139418c | 2409 | if (!conn) |
1da177e4 | 2410 | return 0; |
0139418c | 2411 | |
1da177e4 LT |
2412 | l = &conn->chan_list; |
2413 | ||
2414 | BT_DBG("conn %p", conn); | |
2415 | ||
2416 | read_lock(&l->lock); | |
2417 | ||
2418 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
9719f8af MH |
2419 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
2420 | ||
1da177e4 LT |
2421 | bh_lock_sock(sk); |
2422 | ||
8c1b2355 | 2423 | if (!status && encrypt == 0x00 && |
2af6b9d5 | 2424 | pi->sec_level == BT_SECURITY_HIGH && |
9719f8af | 2425 | (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 2426 | sk->sk_state == BT_CONFIG)) { |
9719f8af MH |
2427 | __l2cap_sock_close(sk, ECONNREFUSED); |
2428 | bh_unlock_sock(sk); | |
2429 | continue; | |
2430 | } | |
2431 | ||
b1235d79 MH |
2432 | if (sk->sk_state == BT_CONNECT) { |
2433 | if (!status) { | |
2434 | struct l2cap_conn_req req; | |
2435 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2436 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 2437 | |
b1235d79 | 2438 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
1da177e4 | 2439 | |
b1235d79 MH |
2440 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2441 | L2CAP_CONN_REQ, sizeof(req), &req); | |
2442 | } else { | |
2443 | l2cap_sock_clear_timer(sk); | |
2444 | l2cap_sock_set_timer(sk, HZ / 10); | |
2445 | } | |
2446 | } else if (sk->sk_state == BT_CONNECT2) { | |
2447 | struct l2cap_conn_rsp rsp; | |
2448 | __u16 result; | |
1da177e4 | 2449 | |
b1235d79 MH |
2450 | if (!status) { |
2451 | sk->sk_state = BT_CONFIG; | |
2452 | result = L2CAP_CR_SUCCESS; | |
2453 | } else { | |
2454 | sk->sk_state = BT_DISCONN; | |
2455 | l2cap_sock_set_timer(sk, HZ / 10); | |
2456 | result = L2CAP_CR_SEC_BLOCK; | |
2457 | } | |
2458 | ||
2459 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
2460 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2461 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 2462 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
2463 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2464 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
2465 | } | |
1da177e4 LT |
2466 | |
2467 | bh_unlock_sock(sk); | |
2468 | } | |
2469 | ||
2470 | read_unlock(&l->lock); | |
b1235d79 | 2471 | |
1da177e4 LT |
2472 | return 0; |
2473 | } | |
2474 | ||
2475 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
2476 | { | |
2477 | struct l2cap_conn *conn = hcon->l2cap_data; | |
2478 | ||
2479 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
2480 | goto drop; | |
2481 | ||
2482 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
2483 | ||
2484 | if (flags & ACL_START) { | |
2485 | struct l2cap_hdr *hdr; | |
2486 | int len; | |
2487 | ||
2488 | if (conn->rx_len) { | |
2489 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
2490 | kfree_skb(conn->rx_skb); | |
2491 | conn->rx_skb = NULL; | |
2492 | conn->rx_len = 0; | |
2493 | l2cap_conn_unreliable(conn, ECOMM); | |
2494 | } | |
2495 | ||
2496 | if (skb->len < 2) { | |
2497 | BT_ERR("Frame is too short (len %d)", skb->len); | |
2498 | l2cap_conn_unreliable(conn, ECOMM); | |
2499 | goto drop; | |
2500 | } | |
2501 | ||
2502 | hdr = (struct l2cap_hdr *) skb->data; | |
2503 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
2504 | ||
2505 | if (len == skb->len) { | |
2506 | /* Complete frame received */ | |
2507 | l2cap_recv_frame(conn, skb); | |
2508 | return 0; | |
2509 | } | |
2510 | ||
2511 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
2512 | ||
2513 | if (skb->len > len) { | |
2514 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
2515 | skb->len, len); | |
2516 | l2cap_conn_unreliable(conn, ECOMM); | |
2517 | goto drop; | |
2518 | } | |
2519 | ||
2520 | /* Allocate skb for the complete frame (with header) */ | |
2521 | if (!(conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC))) | |
2522 | goto drop; | |
2523 | ||
d626f62b ACM |
2524 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
2525 | skb->len); | |
1da177e4 LT |
2526 | conn->rx_len = len - skb->len; |
2527 | } else { | |
2528 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
2529 | ||
2530 | if (!conn->rx_len) { | |
2531 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
2532 | l2cap_conn_unreliable(conn, ECOMM); | |
2533 | goto drop; | |
2534 | } | |
2535 | ||
2536 | if (skb->len > conn->rx_len) { | |
2537 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
2538 | skb->len, conn->rx_len); | |
2539 | kfree_skb(conn->rx_skb); | |
2540 | conn->rx_skb = NULL; | |
2541 | conn->rx_len = 0; | |
2542 | l2cap_conn_unreliable(conn, ECOMM); | |
2543 | goto drop; | |
2544 | } | |
2545 | ||
d626f62b ACM |
2546 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
2547 | skb->len); | |
1da177e4 LT |
2548 | conn->rx_len -= skb->len; |
2549 | ||
2550 | if (!conn->rx_len) { | |
2551 | /* Complete frame received */ | |
2552 | l2cap_recv_frame(conn, conn->rx_skb); | |
2553 | conn->rx_skb = NULL; | |
2554 | } | |
2555 | } | |
2556 | ||
2557 | drop: | |
2558 | kfree_skb(skb); | |
2559 | return 0; | |
2560 | } | |
2561 | ||
be9d1227 | 2562 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
2563 | { |
2564 | struct sock *sk; | |
2565 | struct hlist_node *node; | |
be9d1227 | 2566 | char *str = buf; |
1da177e4 LT |
2567 | |
2568 | read_lock_bh(&l2cap_sk_list.lock); | |
2569 | ||
be9d1227 MH |
2570 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
2571 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1da177e4 | 2572 | |
2af6b9d5 | 2573 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
be9d1227 | 2574 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), |
73863976 | 2575 | sk->sk_state, btohs(pi->psm), pi->scid, pi->dcid, |
2af6b9d5 | 2576 | pi->imtu, pi->omtu, pi->sec_level); |
be9d1227 | 2577 | } |
1da177e4 | 2578 | |
1da177e4 | 2579 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 2580 | |
be9d1227 | 2581 | return (str - buf); |
1da177e4 LT |
2582 | } |
2583 | ||
be9d1227 | 2584 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
1da177e4 | 2585 | |
90ddc4f0 | 2586 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
2587 | .family = PF_BLUETOOTH, |
2588 | .owner = THIS_MODULE, | |
2589 | .release = l2cap_sock_release, | |
2590 | .bind = l2cap_sock_bind, | |
2591 | .connect = l2cap_sock_connect, | |
2592 | .listen = l2cap_sock_listen, | |
2593 | .accept = l2cap_sock_accept, | |
2594 | .getname = l2cap_sock_getname, | |
2595 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 2596 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 2597 | .poll = bt_sock_poll, |
3241ad82 | 2598 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
2599 | .mmap = sock_no_mmap, |
2600 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
2601 | .shutdown = l2cap_sock_shutdown, |
2602 | .setsockopt = l2cap_sock_setsockopt, | |
2603 | .getsockopt = l2cap_sock_getsockopt | |
2604 | }; | |
2605 | ||
2606 | static struct net_proto_family l2cap_sock_family_ops = { | |
2607 | .family = PF_BLUETOOTH, | |
2608 | .owner = THIS_MODULE, | |
2609 | .create = l2cap_sock_create, | |
2610 | }; | |
2611 | ||
2612 | static struct hci_proto l2cap_hci_proto = { | |
2613 | .name = "L2CAP", | |
2614 | .id = HCI_PROTO_L2CAP, | |
2615 | .connect_ind = l2cap_connect_ind, | |
2616 | .connect_cfm = l2cap_connect_cfm, | |
2617 | .disconn_ind = l2cap_disconn_ind, | |
8c1b2355 | 2618 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
2619 | .recv_acldata = l2cap_recv_acldata |
2620 | }; | |
2621 | ||
2622 | static int __init l2cap_init(void) | |
2623 | { | |
2624 | int err; | |
be9d1227 | 2625 | |
1da177e4 LT |
2626 | err = proto_register(&l2cap_proto, 0); |
2627 | if (err < 0) | |
2628 | return err; | |
2629 | ||
2630 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
2631 | if (err < 0) { | |
2632 | BT_ERR("L2CAP socket registration failed"); | |
2633 | goto error; | |
2634 | } | |
2635 | ||
2636 | err = hci_register_proto(&l2cap_hci_proto); | |
2637 | if (err < 0) { | |
2638 | BT_ERR("L2CAP protocol registration failed"); | |
2639 | bt_sock_unregister(BTPROTO_L2CAP); | |
2640 | goto error; | |
2641 | } | |
2642 | ||
df5c37ea MH |
2643 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
2644 | BT_ERR("Failed to create L2CAP info file"); | |
1da177e4 LT |
2645 | |
2646 | BT_INFO("L2CAP ver %s", VERSION); | |
2647 | BT_INFO("L2CAP socket layer initialized"); | |
2648 | ||
2649 | return 0; | |
2650 | ||
2651 | error: | |
2652 | proto_unregister(&l2cap_proto); | |
2653 | return err; | |
2654 | } | |
2655 | ||
2656 | static void __exit l2cap_exit(void) | |
2657 | { | |
a91f2e39 | 2658 | class_remove_file(bt_class, &class_attr_l2cap); |
1da177e4 LT |
2659 | |
2660 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
2661 | BT_ERR("L2CAP socket unregistration failed"); | |
2662 | ||
2663 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
2664 | BT_ERR("L2CAP protocol unregistration failed"); | |
2665 | ||
2666 | proto_unregister(&l2cap_proto); | |
2667 | } | |
2668 | ||
2669 | void l2cap_load(void) | |
2670 | { | |
2671 | /* Dummy function to trigger automatic L2CAP module loading by | |
2672 | * other modules that use L2CAP sockets but don't use any other | |
2673 | * symbols from it. */ | |
2674 | return; | |
2675 | } | |
2676 | EXPORT_SYMBOL(l2cap_load); | |
2677 | ||
2678 | module_init(l2cap_init); | |
2679 | module_exit(l2cap_exit); | |
2680 | ||
63fbd24e | 2681 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
2682 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
2683 | MODULE_VERSION(VERSION); | |
2684 | MODULE_LICENSE("GPL"); | |
2685 | MODULE_ALIAS("bt-proto-0"); |