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 | ||
5f9018af | 53 | #define VERSION "2.12" |
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 | 79 | |
f62e4323 MH |
80 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
81 | reason = ECONNREFUSED; | |
82 | else if (sk->sk_state == BT_CONNECT && | |
2af6b9d5 | 83 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
b1235d79 MH |
84 | reason = ECONNREFUSED; |
85 | else | |
86 | reason = ETIMEDOUT; | |
87 | ||
88 | __l2cap_sock_close(sk, reason); | |
89 | ||
1da177e4 LT |
90 | bh_unlock_sock(sk); |
91 | ||
92 | l2cap_sock_kill(sk); | |
93 | sock_put(sk); | |
94 | } | |
95 | ||
96 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
97 | { | |
98 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
99 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
100 | } | |
101 | ||
102 | static void l2cap_sock_clear_timer(struct sock *sk) | |
103 | { | |
104 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
105 | sk_stop_timer(sk, &sk->sk_timer); | |
106 | } | |
107 | ||
0139418c MH |
108 | /* ---- L2CAP channels ---- */ |
109 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
110 | { | |
111 | struct sock *s; | |
112 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
113 | if (l2cap_pi(s)->dcid == cid) | |
114 | break; | |
115 | } | |
116 | return s; | |
117 | } | |
118 | ||
119 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
120 | { | |
121 | struct sock *s; | |
122 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
123 | if (l2cap_pi(s)->scid == cid) | |
124 | break; | |
125 | } | |
126 | return s; | |
127 | } | |
128 | ||
129 | /* Find channel with given SCID. | |
130 | * Returns locked socket */ | |
131 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
132 | { | |
133 | struct sock *s; | |
134 | read_lock(&l->lock); | |
135 | s = __l2cap_get_chan_by_scid(l, cid); | |
136 | if (s) bh_lock_sock(s); | |
137 | read_unlock(&l->lock); | |
138 | return s; | |
139 | } | |
140 | ||
141 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
142 | { | |
143 | struct sock *s; | |
144 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
145 | if (l2cap_pi(s)->ident == ident) | |
146 | break; | |
147 | } | |
148 | return s; | |
149 | } | |
150 | ||
151 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
152 | { | |
153 | struct sock *s; | |
154 | read_lock(&l->lock); | |
155 | s = __l2cap_get_chan_by_ident(l, ident); | |
156 | if (s) bh_lock_sock(s); | |
157 | read_unlock(&l->lock); | |
158 | return s; | |
159 | } | |
160 | ||
161 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
162 | { | |
163 | u16 cid = 0x0040; | |
164 | ||
165 | for (; cid < 0xffff; cid++) { | |
166 | if(!__l2cap_get_chan_by_scid(l, cid)) | |
167 | return cid; | |
168 | } | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
174 | { | |
175 | sock_hold(sk); | |
176 | ||
177 | if (l->head) | |
178 | l2cap_pi(l->head)->prev_c = sk; | |
179 | ||
180 | l2cap_pi(sk)->next_c = l->head; | |
181 | l2cap_pi(sk)->prev_c = NULL; | |
182 | l->head = sk; | |
183 | } | |
184 | ||
185 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
186 | { | |
187 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
188 | ||
fd1278d7 | 189 | write_lock_bh(&l->lock); |
0139418c MH |
190 | if (sk == l->head) |
191 | l->head = next; | |
192 | ||
193 | if (next) | |
194 | l2cap_pi(next)->prev_c = prev; | |
195 | if (prev) | |
196 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 197 | write_unlock_bh(&l->lock); |
0139418c MH |
198 | |
199 | __sock_put(sk); | |
200 | } | |
201 | ||
202 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
203 | { | |
204 | struct l2cap_chan_list *l = &conn->chan_list; | |
205 | ||
206 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
207 | ||
208 | l2cap_pi(sk)->conn = conn; | |
209 | ||
210 | if (sk->sk_type == SOCK_SEQPACKET) { | |
211 | /* Alloc CID for connection-oriented socket */ | |
212 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
213 | } else if (sk->sk_type == SOCK_DGRAM) { | |
214 | /* Connectionless socket */ | |
215 | l2cap_pi(sk)->scid = 0x0002; | |
216 | l2cap_pi(sk)->dcid = 0x0002; | |
217 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
218 | } else { | |
219 | /* Raw socket can send/recv signalling messages only */ | |
220 | l2cap_pi(sk)->scid = 0x0001; | |
221 | l2cap_pi(sk)->dcid = 0x0001; | |
222 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
223 | } | |
224 | ||
225 | __l2cap_chan_link(l, sk); | |
226 | ||
227 | if (parent) | |
228 | bt_accept_enqueue(parent, sk); | |
229 | } | |
230 | ||
8e87d142 | 231 | /* Delete channel. |
0139418c MH |
232 | * Must be called on the locked socket. */ |
233 | static void l2cap_chan_del(struct sock *sk, int err) | |
234 | { | |
235 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
236 | struct sock *parent = bt_sk(sk)->parent; | |
237 | ||
238 | l2cap_sock_clear_timer(sk); | |
239 | ||
240 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
241 | ||
8e87d142 | 242 | if (conn) { |
0139418c MH |
243 | /* Unlink from channel list */ |
244 | l2cap_chan_unlink(&conn->chan_list, sk); | |
245 | l2cap_pi(sk)->conn = NULL; | |
246 | hci_conn_put(conn->hcon); | |
247 | } | |
248 | ||
b1235d79 | 249 | sk->sk_state = BT_CLOSED; |
0139418c MH |
250 | sock_set_flag(sk, SOCK_ZAPPED); |
251 | ||
252 | if (err) | |
253 | sk->sk_err = err; | |
254 | ||
255 | if (parent) { | |
256 | bt_accept_unlink(sk); | |
257 | parent->sk_data_ready(parent, 0); | |
258 | } else | |
259 | sk->sk_state_change(sk); | |
260 | } | |
261 | ||
79d554a6 | 262 | /* Service level security */ |
2af6b9d5 | 263 | static inline int l2cap_check_security(struct sock *sk) |
79d554a6 MH |
264 | { |
265 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
0684e5f9 MH |
266 | __u8 auth_type; |
267 | ||
268 | switch (l2cap_pi(sk)->sec_level) { | |
269 | case BT_SECURITY_HIGH: | |
270 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
271 | break; | |
272 | case BT_SECURITY_MEDIUM: | |
273 | auth_type = HCI_AT_GENERAL_BONDING; | |
274 | break; | |
275 | default: | |
276 | auth_type = HCI_AT_NO_BONDING; | |
277 | break; | |
278 | } | |
79d554a6 | 279 | |
0684e5f9 MH |
280 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
281 | auth_type); | |
79d554a6 MH |
282 | } |
283 | ||
4e8402a3 MH |
284 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
285 | { | |
286 | u8 id; | |
287 | ||
288 | /* Get next available identificator. | |
289 | * 1 - 128 are used by kernel. | |
290 | * 129 - 199 are reserved. | |
291 | * 200 - 254 are used by utilities like l2ping, etc. | |
292 | */ | |
293 | ||
294 | spin_lock_bh(&conn->lock); | |
295 | ||
296 | if (++conn->tx_ident > 128) | |
297 | conn->tx_ident = 1; | |
298 | ||
299 | id = conn->tx_ident; | |
300 | ||
301 | spin_unlock_bh(&conn->lock); | |
302 | ||
303 | return id; | |
304 | } | |
305 | ||
306 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) | |
307 | { | |
308 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
309 | ||
310 | BT_DBG("code 0x%2.2x", code); | |
311 | ||
312 | if (!skb) | |
313 | return -ENOMEM; | |
314 | ||
315 | return hci_send_acl(conn->hcon, skb, 0); | |
316 | } | |
317 | ||
79d554a6 MH |
318 | static void l2cap_do_start(struct sock *sk) |
319 | { | |
320 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
321 | ||
322 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
984947dc MH |
323 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
324 | return; | |
325 | ||
2af6b9d5 | 326 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
327 | struct l2cap_conn_req req; |
328 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
329 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 330 | |
b1235d79 | 331 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 332 | |
b1235d79 | 333 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 334 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 335 | } |
79d554a6 MH |
336 | } else { |
337 | struct l2cap_info_req req; | |
338 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
339 | ||
340 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
341 | conn->info_ident = l2cap_get_ident(conn); | |
342 | ||
343 | mod_timer(&conn->info_timer, jiffies + | |
344 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
345 | ||
346 | l2cap_send_cmd(conn, conn->info_ident, | |
347 | L2CAP_INFO_REQ, sizeof(req), &req); | |
348 | } | |
349 | } | |
350 | ||
1da177e4 | 351 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
352 | static void l2cap_conn_start(struct l2cap_conn *conn) |
353 | { | |
354 | struct l2cap_chan_list *l = &conn->chan_list; | |
355 | struct sock *sk; | |
356 | ||
357 | BT_DBG("conn %p", conn); | |
358 | ||
359 | read_lock(&l->lock); | |
360 | ||
361 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
362 | bh_lock_sock(sk); | |
363 | ||
364 | if (sk->sk_type != SOCK_SEQPACKET) { | |
79d554a6 MH |
365 | bh_unlock_sock(sk); |
366 | continue; | |
367 | } | |
368 | ||
369 | if (sk->sk_state == BT_CONNECT) { | |
2af6b9d5 | 370 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
371 | struct l2cap_conn_req req; |
372 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
373 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 374 | |
b1235d79 | 375 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 376 | |
b1235d79 | 377 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4e8402a3 | 378 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 379 | } |
79d554a6 MH |
380 | } else if (sk->sk_state == BT_CONNECT2) { |
381 | struct l2cap_conn_rsp rsp; | |
382 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
383 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
384 | ||
2af6b9d5 | 385 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
386 | if (bt_sk(sk)->defer_setup) { |
387 | struct sock *parent = bt_sk(sk)->parent; | |
388 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
389 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
390 | parent->sk_data_ready(parent, 0); | |
391 | ||
392 | } else { | |
393 | sk->sk_state = BT_CONFIG; | |
394 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
395 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
396 | } | |
79d554a6 MH |
397 | } else { |
398 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
399 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
400 | } | |
401 | ||
402 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
403 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4e8402a3 MH |
404 | } |
405 | ||
406 | bh_unlock_sock(sk); | |
407 | } | |
408 | ||
409 | read_unlock(&l->lock); | |
410 | } | |
411 | ||
412 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
413 | { | |
79d554a6 MH |
414 | struct l2cap_chan_list *l = &conn->chan_list; |
415 | struct sock *sk; | |
4e8402a3 | 416 | |
79d554a6 | 417 | BT_DBG("conn %p", conn); |
4e8402a3 | 418 | |
79d554a6 | 419 | read_lock(&l->lock); |
4e8402a3 | 420 | |
79d554a6 MH |
421 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
422 | bh_lock_sock(sk); | |
4e8402a3 | 423 | |
79d554a6 MH |
424 | if (sk->sk_type != SOCK_SEQPACKET) { |
425 | l2cap_sock_clear_timer(sk); | |
426 | sk->sk_state = BT_CONNECTED; | |
427 | sk->sk_state_change(sk); | |
428 | } else if (sk->sk_state == BT_CONNECT) | |
429 | l2cap_do_start(sk); | |
4e8402a3 | 430 | |
79d554a6 | 431 | bh_unlock_sock(sk); |
4e8402a3 | 432 | } |
79d554a6 MH |
433 | |
434 | read_unlock(&l->lock); | |
4e8402a3 MH |
435 | } |
436 | ||
437 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
438 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
439 | { | |
440 | struct l2cap_chan_list *l = &conn->chan_list; | |
441 | struct sock *sk; | |
442 | ||
443 | BT_DBG("conn %p", conn); | |
444 | ||
445 | read_lock(&l->lock); | |
446 | ||
447 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 448 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
449 | sk->sk_err = err; |
450 | } | |
451 | ||
452 | read_unlock(&l->lock); | |
453 | } | |
454 | ||
455 | static void l2cap_info_timeout(unsigned long arg) | |
456 | { | |
457 | struct l2cap_conn *conn = (void *) arg; | |
458 | ||
459 | conn->info_ident = 0; | |
460 | ||
984947dc MH |
461 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
462 | ||
4e8402a3 MH |
463 | l2cap_conn_start(conn); |
464 | } | |
465 | ||
1da177e4 LT |
466 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
467 | { | |
0139418c | 468 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 469 | |
0139418c | 470 | if (conn || status) |
1da177e4 LT |
471 | return conn; |
472 | ||
0139418c MH |
473 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
474 | if (!conn) | |
1da177e4 | 475 | return NULL; |
1da177e4 LT |
476 | |
477 | hcon->l2cap_data = conn; | |
478 | conn->hcon = hcon; | |
479 | ||
0139418c MH |
480 | BT_DBG("hcon %p conn %p", hcon, conn); |
481 | ||
1da177e4 LT |
482 | conn->mtu = hcon->hdev->acl_mtu; |
483 | conn->src = &hcon->hdev->bdaddr; | |
484 | conn->dst = &hcon->dst; | |
485 | ||
4e8402a3 MH |
486 | conn->feat_mask = 0; |
487 | ||
b1235d79 MH |
488 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
489 | (unsigned long) conn); | |
4e8402a3 | 490 | |
1da177e4 LT |
491 | spin_lock_init(&conn->lock); |
492 | rwlock_init(&conn->chan_list.lock); | |
493 | ||
1da177e4 LT |
494 | return conn; |
495 | } | |
496 | ||
0139418c | 497 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 498 | { |
0139418c | 499 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
500 | struct sock *sk; |
501 | ||
0139418c MH |
502 | if (!conn) |
503 | return; | |
1da177e4 LT |
504 | |
505 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
506 | ||
507 | if (conn->rx_skb) | |
508 | kfree_skb(conn->rx_skb); | |
509 | ||
510 | /* Kill channels */ | |
511 | while ((sk = conn->chan_list.head)) { | |
512 | bh_lock_sock(sk); | |
513 | l2cap_chan_del(sk, err); | |
514 | bh_unlock_sock(sk); | |
515 | l2cap_sock_kill(sk); | |
516 | } | |
517 | ||
8e8440f5 DY |
518 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
519 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 520 | |
1da177e4 LT |
521 | hcon->l2cap_data = NULL; |
522 | kfree(conn); | |
1da177e4 LT |
523 | } |
524 | ||
525 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
526 | { | |
527 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 528 | write_lock_bh(&l->lock); |
1da177e4 | 529 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 530 | write_unlock_bh(&l->lock); |
1da177e4 LT |
531 | } |
532 | ||
1da177e4 | 533 | /* ---- Socket interface ---- */ |
8e036fc3 | 534 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
535 | { |
536 | struct sock *sk; | |
537 | struct hlist_node *node; | |
538 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
539 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
540 | goto found; | |
541 | sk = NULL; | |
542 | found: | |
543 | return sk; | |
544 | } | |
545 | ||
546 | /* Find socket with psm and source bdaddr. | |
547 | * Returns closest match. | |
548 | */ | |
8e036fc3 | 549 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
550 | { |
551 | struct sock *sk = NULL, *sk1 = NULL; | |
552 | struct hlist_node *node; | |
553 | ||
554 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
555 | if (state && sk->sk_state != state) | |
556 | continue; | |
557 | ||
558 | if (l2cap_pi(sk)->psm == psm) { | |
559 | /* Exact match. */ | |
560 | if (!bacmp(&bt_sk(sk)->src, src)) | |
561 | break; | |
562 | ||
563 | /* Closest match */ | |
564 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
565 | sk1 = sk; | |
566 | } | |
567 | } | |
568 | return node ? sk : sk1; | |
569 | } | |
570 | ||
571 | /* Find socket with given address (psm, src). | |
572 | * Returns locked socket */ | |
8e036fc3 | 573 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
574 | { |
575 | struct sock *s; | |
576 | read_lock(&l2cap_sk_list.lock); | |
577 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
578 | if (s) bh_lock_sock(s); | |
579 | read_unlock(&l2cap_sk_list.lock); | |
580 | return s; | |
581 | } | |
582 | ||
583 | static void l2cap_sock_destruct(struct sock *sk) | |
584 | { | |
585 | BT_DBG("sk %p", sk); | |
586 | ||
587 | skb_queue_purge(&sk->sk_receive_queue); | |
588 | skb_queue_purge(&sk->sk_write_queue); | |
589 | } | |
590 | ||
591 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
592 | { | |
593 | struct sock *sk; | |
594 | ||
595 | BT_DBG("parent %p", parent); | |
596 | ||
597 | /* Close not yet accepted channels */ | |
598 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
599 | l2cap_sock_close(sk); | |
600 | ||
b1235d79 | 601 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
602 | sock_set_flag(parent, SOCK_ZAPPED); |
603 | } | |
604 | ||
605 | /* Kill socket (only if zapped and orphan) | |
606 | * Must be called on unlocked socket. | |
607 | */ | |
608 | static void l2cap_sock_kill(struct sock *sk) | |
609 | { | |
610 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
611 | return; | |
612 | ||
613 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
614 | ||
615 | /* Kill poor orphan */ | |
616 | bt_sock_unlink(&l2cap_sk_list, sk); | |
617 | sock_set_flag(sk, SOCK_DEAD); | |
618 | sock_put(sk); | |
619 | } | |
620 | ||
621 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
622 | { | |
623 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
624 | ||
625 | switch (sk->sk_state) { | |
626 | case BT_LISTEN: | |
627 | l2cap_sock_cleanup_listen(sk); | |
628 | break; | |
629 | ||
630 | case BT_CONNECTED: | |
631 | case BT_CONFIG: | |
1da177e4 LT |
632 | if (sk->sk_type == SOCK_SEQPACKET) { |
633 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
634 | struct l2cap_disconn_req req; | |
635 | ||
636 | sk->sk_state = BT_DISCONN; | |
637 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
638 | ||
aca3192c YH |
639 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
640 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
641 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
642 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
b1235d79 | 643 | } else |
1da177e4 | 644 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
645 | break; |
646 | ||
f66dc81f MH |
647 | case BT_CONNECT2: |
648 | if (sk->sk_type == SOCK_SEQPACKET) { | |
649 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
650 | struct l2cap_conn_rsp rsp; | |
651 | __u16 result; | |
652 | ||
653 | if (bt_sk(sk)->defer_setup) | |
654 | result = L2CAP_CR_SEC_BLOCK; | |
655 | else | |
656 | result = L2CAP_CR_BAD_PSM; | |
657 | ||
658 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
659 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
660 | rsp.result = cpu_to_le16(result); | |
661 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
662 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
663 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
664 | } else | |
665 | l2cap_chan_del(sk, reason); | |
666 | break; | |
667 | ||
1da177e4 LT |
668 | case BT_CONNECT: |
669 | case BT_DISCONN: | |
670 | l2cap_chan_del(sk, reason); | |
671 | break; | |
672 | ||
673 | default: | |
674 | sock_set_flag(sk, SOCK_ZAPPED); | |
675 | break; | |
676 | } | |
677 | } | |
678 | ||
679 | /* Must be called on unlocked socket. */ | |
680 | static void l2cap_sock_close(struct sock *sk) | |
681 | { | |
682 | l2cap_sock_clear_timer(sk); | |
683 | lock_sock(sk); | |
684 | __l2cap_sock_close(sk, ECONNRESET); | |
685 | release_sock(sk); | |
686 | l2cap_sock_kill(sk); | |
687 | } | |
688 | ||
689 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
690 | { | |
691 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
692 | ||
693 | BT_DBG("sk %p", sk); | |
694 | ||
695 | if (parent) { | |
696 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
697 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
698 | ||
1da177e4 LT |
699 | pi->imtu = l2cap_pi(parent)->imtu; |
700 | pi->omtu = l2cap_pi(parent)->omtu; | |
2af6b9d5 MH |
701 | pi->sec_level = l2cap_pi(parent)->sec_level; |
702 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
703 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
704 | } else { |
705 | pi->imtu = L2CAP_DEFAULT_MTU; | |
706 | pi->omtu = 0; | |
2af6b9d5 MH |
707 | pi->sec_level = BT_SECURITY_LOW; |
708 | pi->role_switch = 0; | |
709 | pi->force_reliable = 0; | |
1da177e4 LT |
710 | } |
711 | ||
712 | /* Default config options */ | |
5dee9e7c | 713 | pi->conf_len = 0; |
1da177e4 LT |
714 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
715 | } | |
716 | ||
717 | static struct proto l2cap_proto = { | |
718 | .name = "L2CAP", | |
719 | .owner = THIS_MODULE, | |
720 | .obj_size = sizeof(struct l2cap_pinfo) | |
721 | }; | |
722 | ||
1b8d7ae4 | 723 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
724 | { |
725 | struct sock *sk; | |
726 | ||
6257ff21 | 727 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
728 | if (!sk) |
729 | return NULL; | |
730 | ||
731 | sock_init_data(sock, sk); | |
732 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
733 | ||
734 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 735 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
736 | |
737 | sock_reset_flag(sk, SOCK_ZAPPED); | |
738 | ||
739 | sk->sk_protocol = proto; | |
b1235d79 | 740 | sk->sk_state = BT_OPEN; |
1da177e4 | 741 | |
b1235d79 | 742 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
743 | |
744 | bt_sock_link(&l2cap_sk_list, sk); | |
745 | return sk; | |
746 | } | |
747 | ||
1b8d7ae4 | 748 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
749 | { |
750 | struct sock *sk; | |
751 | ||
752 | BT_DBG("sock %p", sock); | |
753 | ||
754 | sock->state = SS_UNCONNECTED; | |
755 | ||
756 | if (sock->type != SOCK_SEQPACKET && | |
757 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
758 | return -ESOCKTNOSUPPORT; | |
759 | ||
760 | if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW)) | |
761 | return -EPERM; | |
762 | ||
763 | sock->ops = &l2cap_sock_ops; | |
764 | ||
1b8d7ae4 | 765 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
766 | if (!sk) |
767 | return -ENOMEM; | |
768 | ||
769 | l2cap_sock_init(sk, NULL); | |
770 | return 0; | |
771 | } | |
772 | ||
773 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
774 | { | |
775 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
776 | struct sock *sk = sock->sk; | |
777 | int err = 0; | |
778 | ||
779 | BT_DBG("sk %p, %s %d", sk, batostr(&la->l2_bdaddr), la->l2_psm); | |
780 | ||
781 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
782 | return -EINVAL; | |
783 | ||
784 | lock_sock(sk); | |
785 | ||
786 | if (sk->sk_state != BT_OPEN) { | |
787 | err = -EBADFD; | |
788 | goto done; | |
789 | } | |
790 | ||
8e036fc3 | 791 | if (la->l2_psm && btohs(la->l2_psm) < 0x1001 && |
847641d7 MH |
792 | !capable(CAP_NET_BIND_SERVICE)) { |
793 | err = -EACCES; | |
794 | goto done; | |
795 | } | |
8e87d142 | 796 | |
1da177e4 LT |
797 | write_lock_bh(&l2cap_sk_list.lock); |
798 | ||
799 | if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) { | |
800 | err = -EADDRINUSE; | |
801 | } else { | |
802 | /* Save source address */ | |
803 | bacpy(&bt_sk(sk)->src, &la->l2_bdaddr); | |
804 | l2cap_pi(sk)->psm = la->l2_psm; | |
805 | l2cap_pi(sk)->sport = la->l2_psm; | |
806 | sk->sk_state = BT_BOUND; | |
2af6b9d5 | 807 | |
435fef20 | 808 | if (btohs(la->l2_psm) == 0x0001 || btohs(la->l2_psm) == 0x0003) |
2af6b9d5 | 809 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
1da177e4 LT |
810 | } |
811 | ||
812 | write_unlock_bh(&l2cap_sk_list.lock); | |
813 | ||
814 | done: | |
815 | release_sock(sk); | |
816 | return err; | |
817 | } | |
818 | ||
819 | static int l2cap_do_connect(struct sock *sk) | |
820 | { | |
821 | bdaddr_t *src = &bt_sk(sk)->src; | |
822 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
823 | struct l2cap_conn *conn; | |
824 | struct hci_conn *hcon; | |
825 | struct hci_dev *hdev; | |
09ab6f4c | 826 | __u8 auth_type; |
1da177e4 LT |
827 | int err = 0; |
828 | ||
829 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), l2cap_pi(sk)->psm); | |
830 | ||
831 | if (!(hdev = hci_get_route(dst, src))) | |
832 | return -EHOSTUNREACH; | |
833 | ||
834 | hci_dev_lock_bh(hdev); | |
835 | ||
836 | err = -ENOMEM; | |
837 | ||
8c1b2355 | 838 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
839 | switch (l2cap_pi(sk)->sec_level) { |
840 | case BT_SECURITY_HIGH: | |
8c1b2355 | 841 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
842 | break; |
843 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 844 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
845 | break; |
846 | default: | |
09ab6f4c | 847 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
848 | break; |
849 | } | |
8c1b2355 | 850 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 851 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 852 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 853 | else |
8c1b2355 | 854 | auth_type = HCI_AT_NO_BONDING; |
435fef20 MH |
855 | |
856 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
857 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
8c1b2355 | 858 | } else { |
2af6b9d5 MH |
859 | switch (l2cap_pi(sk)->sec_level) { |
860 | case BT_SECURITY_HIGH: | |
8c1b2355 | 861 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
862 | break; |
863 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 864 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
865 | break; |
866 | default: | |
8c1b2355 | 867 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
868 | break; |
869 | } | |
09ab6f4c MH |
870 | } |
871 | ||
2af6b9d5 MH |
872 | hcon = hci_connect(hdev, ACL_LINK, dst, |
873 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
874 | if (!hcon) |
875 | goto done; | |
876 | ||
877 | conn = l2cap_conn_add(hcon, 0); | |
878 | if (!conn) { | |
879 | hci_conn_put(hcon); | |
880 | goto done; | |
881 | } | |
882 | ||
883 | err = 0; | |
884 | ||
885 | /* Update source addr of the socket */ | |
886 | bacpy(src, conn->src); | |
887 | ||
888 | l2cap_chan_add(conn, sk, NULL); | |
889 | ||
890 | sk->sk_state = BT_CONNECT; | |
891 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
892 | ||
893 | if (hcon->state == BT_CONNECTED) { | |
79d554a6 | 894 | if (sk->sk_type != SOCK_SEQPACKET) { |
1da177e4 LT |
895 | l2cap_sock_clear_timer(sk); |
896 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
897 | } else |
898 | l2cap_do_start(sk); | |
1da177e4 LT |
899 | } |
900 | ||
901 | done: | |
902 | hci_dev_unlock_bh(hdev); | |
903 | hci_dev_put(hdev); | |
904 | return err; | |
905 | } | |
906 | ||
907 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
908 | { | |
909 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
910 | struct sock *sk = sock->sk; | |
911 | int err = 0; | |
912 | ||
913 | lock_sock(sk); | |
914 | ||
915 | BT_DBG("sk %p", sk); | |
916 | ||
917 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_l2)) { | |
918 | err = -EINVAL; | |
919 | goto done; | |
920 | } | |
921 | ||
922 | if (sk->sk_type == SOCK_SEQPACKET && !la->l2_psm) { | |
923 | err = -EINVAL; | |
924 | goto done; | |
925 | } | |
926 | ||
927 | switch(sk->sk_state) { | |
928 | case BT_CONNECT: | |
929 | case BT_CONNECT2: | |
930 | case BT_CONFIG: | |
931 | /* Already connecting */ | |
932 | goto wait; | |
933 | ||
934 | case BT_CONNECTED: | |
935 | /* Already connected */ | |
936 | goto done; | |
937 | ||
938 | case BT_OPEN: | |
939 | case BT_BOUND: | |
940 | /* Can connect */ | |
941 | break; | |
942 | ||
943 | default: | |
944 | err = -EBADFD; | |
945 | goto done; | |
946 | } | |
947 | ||
948 | /* Set destination address and psm */ | |
949 | bacpy(&bt_sk(sk)->dst, &la->l2_bdaddr); | |
950 | l2cap_pi(sk)->psm = la->l2_psm; | |
951 | ||
952 | if ((err = l2cap_do_connect(sk))) | |
953 | goto done; | |
954 | ||
955 | wait: | |
956 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
957 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
958 | done: | |
959 | release_sock(sk); | |
960 | return err; | |
961 | } | |
962 | ||
963 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
964 | { | |
965 | struct sock *sk = sock->sk; | |
966 | int err = 0; | |
967 | ||
968 | BT_DBG("sk %p backlog %d", sk, backlog); | |
969 | ||
970 | lock_sock(sk); | |
971 | ||
972 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
973 | err = -EBADFD; | |
974 | goto done; | |
975 | } | |
976 | ||
977 | if (!l2cap_pi(sk)->psm) { | |
978 | bdaddr_t *src = &bt_sk(sk)->src; | |
979 | u16 psm; | |
980 | ||
981 | err = -EINVAL; | |
982 | ||
983 | write_lock_bh(&l2cap_sk_list.lock); | |
984 | ||
985 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
6dc0c208 | 986 | if (!__l2cap_get_sock_by_addr(htobs(psm), src)) { |
1da177e4 LT |
987 | l2cap_pi(sk)->psm = htobs(psm); |
988 | l2cap_pi(sk)->sport = htobs(psm); | |
989 | err = 0; | |
990 | break; | |
991 | } | |
992 | ||
993 | write_unlock_bh(&l2cap_sk_list.lock); | |
994 | ||
995 | if (err < 0) | |
996 | goto done; | |
997 | } | |
998 | ||
999 | sk->sk_max_ack_backlog = backlog; | |
1000 | sk->sk_ack_backlog = 0; | |
1001 | sk->sk_state = BT_LISTEN; | |
1002 | ||
1003 | done: | |
1004 | release_sock(sk); | |
1005 | return err; | |
1006 | } | |
1007 | ||
1008 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
1009 | { | |
1010 | DECLARE_WAITQUEUE(wait, current); | |
1011 | struct sock *sk = sock->sk, *nsk; | |
1012 | long timeo; | |
1013 | int err = 0; | |
1014 | ||
fcc70d5f | 1015 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1016 | |
1017 | if (sk->sk_state != BT_LISTEN) { | |
1018 | err = -EBADFD; | |
1019 | goto done; | |
1020 | } | |
1021 | ||
1022 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1023 | ||
1024 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1025 | ||
1026 | /* Wait for an incoming connection. (wake-one). */ | |
1027 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
1028 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
1029 | set_current_state(TASK_INTERRUPTIBLE); | |
1030 | if (!timeo) { | |
1031 | err = -EAGAIN; | |
1032 | break; | |
1033 | } | |
1034 | ||
1035 | release_sock(sk); | |
1036 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1037 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1038 | |
1039 | if (sk->sk_state != BT_LISTEN) { | |
1040 | err = -EBADFD; | |
1041 | break; | |
1042 | } | |
1043 | ||
1044 | if (signal_pending(current)) { | |
1045 | err = sock_intr_errno(timeo); | |
1046 | break; | |
1047 | } | |
1048 | } | |
1049 | set_current_state(TASK_RUNNING); | |
1050 | remove_wait_queue(sk->sk_sleep, &wait); | |
1051 | ||
1052 | if (err) | |
1053 | goto done; | |
1054 | ||
1055 | newsock->state = SS_CONNECTED; | |
1056 | ||
1057 | BT_DBG("new socket %p", nsk); | |
1058 | ||
1059 | done: | |
1060 | release_sock(sk); | |
1061 | return err; | |
1062 | } | |
1063 | ||
1064 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1065 | { | |
1066 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1067 | struct sock *sk = sock->sk; | |
1068 | ||
1069 | BT_DBG("sock %p, sk %p", sock, sk); | |
1070 | ||
1071 | addr->sa_family = AF_BLUETOOTH; | |
1072 | *len = sizeof(struct sockaddr_l2); | |
1073 | ||
1074 | if (peer) | |
1075 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); | |
1076 | else | |
1077 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); | |
1078 | ||
1079 | la->l2_psm = l2cap_pi(sk)->psm; | |
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len) | |
1084 | { | |
1085 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1086 | struct sk_buff *skb, **frag; | |
1087 | int err, hlen, count, sent=0; | |
1088 | struct l2cap_hdr *lh; | |
1089 | ||
1090 | BT_DBG("sk %p len %d", sk, len); | |
1091 | ||
1092 | /* First fragment (with L2CAP header) */ | |
1093 | if (sk->sk_type == SOCK_DGRAM) | |
1094 | hlen = L2CAP_HDR_SIZE + 2; | |
1095 | else | |
1096 | hlen = L2CAP_HDR_SIZE; | |
1097 | ||
1098 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1099 | ||
1100 | skb = bt_skb_send_alloc(sk, hlen + count, | |
1101 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1102 | if (!skb) | |
1103 | return err; | |
1104 | ||
1105 | /* Create L2CAP header */ | |
1106 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
1107 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
1108 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1da177e4 LT |
1109 | |
1110 | if (sk->sk_type == SOCK_DGRAM) | |
8e036fc3 | 1111 | put_unaligned(l2cap_pi(sk)->psm, (__le16 *) skb_put(skb, 2)); |
1da177e4 LT |
1112 | |
1113 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
1114 | err = -EFAULT; | |
1115 | goto fail; | |
1116 | } | |
1117 | ||
1118 | sent += count; | |
1119 | len -= count; | |
1120 | ||
1121 | /* Continuation fragments (no L2CAP header) */ | |
1122 | frag = &skb_shinfo(skb)->frag_list; | |
1123 | while (len) { | |
1124 | count = min_t(unsigned int, conn->mtu, len); | |
1125 | ||
1126 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1127 | if (!*frag) | |
1128 | goto fail; | |
8e87d142 | 1129 | |
1da177e4 LT |
1130 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) { |
1131 | err = -EFAULT; | |
1132 | goto fail; | |
1133 | } | |
1134 | ||
1135 | sent += count; | |
1136 | len -= count; | |
1137 | ||
1138 | frag = &(*frag)->next; | |
1139 | } | |
1140 | ||
1141 | if ((err = hci_send_acl(conn->hcon, skb, 0)) < 0) | |
1142 | goto fail; | |
1143 | ||
1144 | return sent; | |
1145 | ||
1146 | fail: | |
1147 | kfree_skb(skb); | |
1148 | return err; | |
1149 | } | |
1150 | ||
1151 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
1152 | { | |
1153 | struct sock *sk = sock->sk; | |
1154 | int err = 0; | |
1155 | ||
1156 | BT_DBG("sock %p, sk %p", sock, sk); | |
1157 | ||
c1cbe4b7 BL |
1158 | err = sock_error(sk); |
1159 | if (err) | |
1160 | return err; | |
1da177e4 LT |
1161 | |
1162 | if (msg->msg_flags & MSG_OOB) | |
1163 | return -EOPNOTSUPP; | |
1164 | ||
1165 | /* Check outgoing MTU */ | |
1166 | if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu) | |
1167 | return -EINVAL; | |
1168 | ||
1169 | lock_sock(sk); | |
1170 | ||
1171 | if (sk->sk_state == BT_CONNECTED) | |
1172 | err = l2cap_do_send(sk, msg, len); | |
1173 | else | |
1174 | err = -ENOTCONN; | |
1175 | ||
1176 | release_sock(sk); | |
1177 | return err; | |
1178 | } | |
1179 | ||
f66dc81f MH |
1180 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1181 | { | |
1182 | struct sock *sk = sock->sk; | |
1183 | ||
1184 | lock_sock(sk); | |
1185 | ||
1186 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1187 | struct l2cap_conn_rsp rsp; | |
1188 | ||
1189 | sk->sk_state = BT_CONFIG; | |
1190 | ||
1191 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1192 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1193 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1194 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1195 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1196 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1197 | ||
1198 | release_sock(sk); | |
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | release_sock(sk); | |
1203 | ||
1204 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1205 | } | |
1206 | ||
d58daf42 | 1207 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen) |
1da177e4 LT |
1208 | { |
1209 | struct sock *sk = sock->sk; | |
1210 | struct l2cap_options opts; | |
1211 | int err = 0, len; | |
1212 | u32 opt; | |
1213 | ||
1214 | BT_DBG("sk %p", sk); | |
1215 | ||
1216 | lock_sock(sk); | |
1217 | ||
1218 | switch (optname) { | |
1219 | case L2CAP_OPTIONS: | |
0878b666 MH |
1220 | opts.imtu = l2cap_pi(sk)->imtu; |
1221 | opts.omtu = l2cap_pi(sk)->omtu; | |
1222 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
6464f35f | 1223 | opts.mode = L2CAP_MODE_BASIC; |
0878b666 | 1224 | |
1da177e4 LT |
1225 | len = min_t(unsigned int, sizeof(opts), optlen); |
1226 | if (copy_from_user((char *) &opts, optval, len)) { | |
1227 | err = -EFAULT; | |
1228 | break; | |
1229 | } | |
0878b666 | 1230 | |
1da177e4 LT |
1231 | l2cap_pi(sk)->imtu = opts.imtu; |
1232 | l2cap_pi(sk)->omtu = opts.omtu; | |
1233 | break; | |
1234 | ||
1235 | case L2CAP_LM: | |
1236 | if (get_user(opt, (u32 __user *) optval)) { | |
1237 | err = -EFAULT; | |
1238 | break; | |
1239 | } | |
1240 | ||
2af6b9d5 MH |
1241 | if (opt & L2CAP_LM_AUTH) |
1242 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
1243 | if (opt & L2CAP_LM_ENCRYPT) | |
1244 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
1245 | if (opt & L2CAP_LM_SECURE) | |
1246 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
1247 | ||
1248 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
1249 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
1250 | break; |
1251 | ||
1252 | default: | |
1253 | err = -ENOPROTOOPT; | |
1254 | break; | |
1255 | } | |
1256 | ||
1257 | release_sock(sk); | |
1258 | return err; | |
1259 | } | |
1260 | ||
d58daf42 MH |
1261 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) |
1262 | { | |
1263 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
1264 | struct bt_security sec; |
1265 | int len, err = 0; | |
f66dc81f | 1266 | u32 opt; |
d58daf42 MH |
1267 | |
1268 | BT_DBG("sk %p", sk); | |
1269 | ||
1270 | if (level == SOL_L2CAP) | |
1271 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
1272 | ||
0588d94f MH |
1273 | if (level != SOL_BLUETOOTH) |
1274 | return -ENOPROTOOPT; | |
1275 | ||
d58daf42 MH |
1276 | lock_sock(sk); |
1277 | ||
1278 | switch (optname) { | |
2af6b9d5 | 1279 | case BT_SECURITY: |
0588d94f MH |
1280 | if (sk->sk_type != SOCK_SEQPACKET) { |
1281 | err = -EINVAL; | |
1282 | break; | |
1283 | } | |
1284 | ||
2af6b9d5 MH |
1285 | sec.level = BT_SECURITY_LOW; |
1286 | ||
1287 | len = min_t(unsigned int, sizeof(sec), optlen); | |
1288 | if (copy_from_user((char *) &sec, optval, len)) { | |
1289 | err = -EFAULT; | |
1290 | break; | |
1291 | } | |
1292 | ||
1293 | if (sec.level < BT_SECURITY_LOW || | |
1294 | sec.level > BT_SECURITY_HIGH) { | |
1295 | err = -EINVAL; | |
1296 | break; | |
1297 | } | |
1298 | ||
1299 | l2cap_pi(sk)->sec_level = sec.level; | |
1300 | break; | |
1301 | ||
f66dc81f MH |
1302 | case BT_DEFER_SETUP: |
1303 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1304 | err = -EINVAL; | |
1305 | break; | |
1306 | } | |
1307 | ||
1308 | if (get_user(opt, (u32 __user *) optval)) { | |
1309 | err = -EFAULT; | |
1310 | break; | |
1311 | } | |
1312 | ||
1313 | bt_sk(sk)->defer_setup = opt; | |
1314 | break; | |
1315 | ||
d58daf42 MH |
1316 | default: |
1317 | err = -ENOPROTOOPT; | |
1318 | break; | |
1319 | } | |
1320 | ||
1321 | release_sock(sk); | |
1322 | return err; | |
1323 | } | |
1324 | ||
1325 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
1326 | { |
1327 | struct sock *sk = sock->sk; | |
1328 | struct l2cap_options opts; | |
1329 | struct l2cap_conninfo cinfo; | |
1330 | int len, err = 0; | |
2af6b9d5 | 1331 | u32 opt; |
1da177e4 LT |
1332 | |
1333 | BT_DBG("sk %p", sk); | |
1334 | ||
1335 | if (get_user(len, optlen)) | |
1336 | return -EFAULT; | |
1337 | ||
1338 | lock_sock(sk); | |
1339 | ||
1340 | switch (optname) { | |
1341 | case L2CAP_OPTIONS: | |
1342 | opts.imtu = l2cap_pi(sk)->imtu; | |
1343 | opts.omtu = l2cap_pi(sk)->omtu; | |
1344 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
6464f35f | 1345 | opts.mode = L2CAP_MODE_BASIC; |
1da177e4 LT |
1346 | |
1347 | len = min_t(unsigned int, len, sizeof(opts)); | |
1348 | if (copy_to_user(optval, (char *) &opts, len)) | |
1349 | err = -EFAULT; | |
1350 | ||
1351 | break; | |
1352 | ||
1353 | case L2CAP_LM: | |
2af6b9d5 MH |
1354 | switch (l2cap_pi(sk)->sec_level) { |
1355 | case BT_SECURITY_LOW: | |
1356 | opt = L2CAP_LM_AUTH; | |
1357 | break; | |
1358 | case BT_SECURITY_MEDIUM: | |
1359 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
1360 | break; | |
1361 | case BT_SECURITY_HIGH: | |
1362 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
1363 | L2CAP_LM_SECURE; | |
1364 | break; | |
1365 | default: | |
1366 | opt = 0; | |
1367 | break; | |
1368 | } | |
1369 | ||
1370 | if (l2cap_pi(sk)->role_switch) | |
1371 | opt |= L2CAP_LM_MASTER; | |
1372 | ||
1373 | if (l2cap_pi(sk)->force_reliable) | |
1374 | opt |= L2CAP_LM_RELIABLE; | |
1375 | ||
1376 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
1377 | err = -EFAULT; |
1378 | break; | |
1379 | ||
1380 | case L2CAP_CONNINFO: | |
f66dc81f MH |
1381 | if (sk->sk_state != BT_CONNECTED && |
1382 | !(sk->sk_state == BT_CONNECT2 && | |
1383 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
1384 | err = -ENOTCONN; |
1385 | break; | |
1386 | } | |
1387 | ||
1388 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
1389 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
1390 | ||
1391 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
1392 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
1393 | err = -EFAULT; | |
1394 | ||
1395 | break; | |
1396 | ||
1397 | default: | |
1398 | err = -ENOPROTOOPT; | |
1399 | break; | |
1400 | } | |
1401 | ||
1402 | release_sock(sk); | |
1403 | return err; | |
1404 | } | |
1405 | ||
d58daf42 MH |
1406 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
1407 | { | |
1408 | struct sock *sk = sock->sk; | |
2af6b9d5 | 1409 | struct bt_security sec; |
d58daf42 MH |
1410 | int len, err = 0; |
1411 | ||
1412 | BT_DBG("sk %p", sk); | |
1413 | ||
1414 | if (level == SOL_L2CAP) | |
1415 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
1416 | ||
0588d94f MH |
1417 | if (level != SOL_BLUETOOTH) |
1418 | return -ENOPROTOOPT; | |
1419 | ||
d58daf42 MH |
1420 | if (get_user(len, optlen)) |
1421 | return -EFAULT; | |
1422 | ||
1423 | lock_sock(sk); | |
1424 | ||
1425 | switch (optname) { | |
2af6b9d5 | 1426 | case BT_SECURITY: |
0588d94f MH |
1427 | if (sk->sk_type != SOCK_SEQPACKET) { |
1428 | err = -EINVAL; | |
1429 | break; | |
1430 | } | |
1431 | ||
2af6b9d5 MH |
1432 | sec.level = l2cap_pi(sk)->sec_level; |
1433 | ||
1434 | len = min_t(unsigned int, len, sizeof(sec)); | |
1435 | if (copy_to_user(optval, (char *) &sec, len)) | |
1436 | err = -EFAULT; | |
1437 | ||
1438 | break; | |
1439 | ||
f66dc81f MH |
1440 | case BT_DEFER_SETUP: |
1441 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1442 | err = -EINVAL; | |
1443 | break; | |
1444 | } | |
1445 | ||
1446 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
1447 | err = -EFAULT; | |
1448 | ||
1449 | break; | |
1450 | ||
d58daf42 MH |
1451 | default: |
1452 | err = -ENOPROTOOPT; | |
1453 | break; | |
1454 | } | |
1455 | ||
1456 | release_sock(sk); | |
1457 | return err; | |
1458 | } | |
1459 | ||
1da177e4 LT |
1460 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1461 | { | |
1462 | struct sock *sk = sock->sk; | |
1463 | int err = 0; | |
1464 | ||
1465 | BT_DBG("sock %p, sk %p", sock, sk); | |
1466 | ||
1467 | if (!sk) | |
1468 | return 0; | |
1469 | ||
1470 | lock_sock(sk); | |
1471 | if (!sk->sk_shutdown) { | |
1472 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1473 | l2cap_sock_clear_timer(sk); | |
1474 | __l2cap_sock_close(sk, 0); | |
1475 | ||
1476 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
1477 | err = bt_sock_wait_state(sk, BT_CLOSED, |
1478 | sk->sk_lingertime); | |
1da177e4 LT |
1479 | } |
1480 | release_sock(sk); | |
1481 | return err; | |
1482 | } | |
1483 | ||
1484 | static int l2cap_sock_release(struct socket *sock) | |
1485 | { | |
1486 | struct sock *sk = sock->sk; | |
1487 | int err; | |
1488 | ||
1489 | BT_DBG("sock %p, sk %p", sock, sk); | |
1490 | ||
1491 | if (!sk) | |
1492 | return 0; | |
1493 | ||
1494 | err = l2cap_sock_shutdown(sock, 2); | |
1495 | ||
1496 | sock_orphan(sk); | |
1497 | l2cap_sock_kill(sk); | |
1498 | return err; | |
1499 | } | |
1500 | ||
1da177e4 LT |
1501 | static void l2cap_chan_ready(struct sock *sk) |
1502 | { | |
1503 | struct sock *parent = bt_sk(sk)->parent; | |
1504 | ||
1505 | BT_DBG("sk %p, parent %p", sk, parent); | |
1506 | ||
1507 | l2cap_pi(sk)->conf_state = 0; | |
1508 | l2cap_sock_clear_timer(sk); | |
1509 | ||
1510 | if (!parent) { | |
1511 | /* Outgoing channel. | |
1512 | * Wake up socket sleeping on connect. | |
1513 | */ | |
1514 | sk->sk_state = BT_CONNECTED; | |
1515 | sk->sk_state_change(sk); | |
1516 | } else { | |
1517 | /* Incoming channel. | |
1518 | * Wake up socket sleeping on accept. | |
1519 | */ | |
1520 | parent->sk_data_ready(parent, 0); | |
1521 | } | |
1522 | } | |
1523 | ||
1524 | /* Copy frame to all raw sockets on that connection */ | |
1525 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
1526 | { | |
1527 | struct l2cap_chan_list *l = &conn->chan_list; | |
1528 | struct sk_buff *nskb; | |
1529 | struct sock * sk; | |
1530 | ||
1531 | BT_DBG("conn %p", conn); | |
1532 | ||
1533 | read_lock(&l->lock); | |
1534 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1535 | if (sk->sk_type != SOCK_RAW) | |
1536 | continue; | |
1537 | ||
1538 | /* Don't send frame to the socket it came from */ | |
1539 | if (skb->sk == sk) | |
1540 | continue; | |
1541 | ||
1542 | if (!(nskb = skb_clone(skb, GFP_ATOMIC))) | |
1543 | continue; | |
1544 | ||
1545 | if (sock_queue_rcv_skb(sk, nskb)) | |
1546 | kfree_skb(nskb); | |
1547 | } | |
1548 | read_unlock(&l->lock); | |
1549 | } | |
1550 | ||
1551 | /* ---- L2CAP signalling commands ---- */ | |
1552 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
1553 | u8 code, u8 ident, u16 dlen, void *data) | |
1554 | { | |
1555 | struct sk_buff *skb, **frag; | |
1556 | struct l2cap_cmd_hdr *cmd; | |
1557 | struct l2cap_hdr *lh; | |
1558 | int len, count; | |
1559 | ||
1560 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", conn, code, ident, dlen); | |
1561 | ||
1562 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
1563 | count = min_t(unsigned int, conn->mtu, len); | |
1564 | ||
1565 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
1566 | if (!skb) | |
1567 | return NULL; | |
1568 | ||
1569 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
1570 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
1571 | lh->cid = cpu_to_le16(0x0001); | |
1da177e4 LT |
1572 | |
1573 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
1574 | cmd->code = code; | |
1575 | cmd->ident = ident; | |
aca3192c | 1576 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
1577 | |
1578 | if (dlen) { | |
1579 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
1580 | memcpy(skb_put(skb, count), data, count); | |
1581 | data += count; | |
1582 | } | |
1583 | ||
1584 | len -= skb->len; | |
1585 | ||
1586 | /* Continuation fragments (no L2CAP header) */ | |
1587 | frag = &skb_shinfo(skb)->frag_list; | |
1588 | while (len) { | |
1589 | count = min_t(unsigned int, conn->mtu, len); | |
1590 | ||
1591 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
1592 | if (!*frag) | |
1593 | goto fail; | |
1594 | ||
1595 | memcpy(skb_put(*frag, count), data, count); | |
1596 | ||
1597 | len -= count; | |
1598 | data += count; | |
1599 | ||
1600 | frag = &(*frag)->next; | |
1601 | } | |
1602 | ||
1603 | return skb; | |
1604 | ||
1605 | fail: | |
1606 | kfree_skb(skb); | |
1607 | return NULL; | |
1608 | } | |
1609 | ||
1610 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
1611 | { | |
1612 | struct l2cap_conf_opt *opt = *ptr; | |
1613 | int len; | |
1614 | ||
1615 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
1616 | *ptr += len; | |
1617 | ||
1618 | *type = opt->type; | |
1619 | *olen = opt->len; | |
1620 | ||
1621 | switch (opt->len) { | |
1622 | case 1: | |
1623 | *val = *((u8 *) opt->val); | |
1624 | break; | |
1625 | ||
1626 | case 2: | |
861d6882 | 1627 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
1628 | break; |
1629 | ||
1630 | case 4: | |
861d6882 | 1631 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
1632 | break; |
1633 | ||
1634 | default: | |
1635 | *val = (unsigned long) opt->val; | |
1636 | break; | |
1637 | } | |
1638 | ||
1639 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
1640 | return len; | |
1641 | } | |
1642 | ||
1da177e4 LT |
1643 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
1644 | { | |
1645 | struct l2cap_conf_opt *opt = *ptr; | |
1646 | ||
1647 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
1648 | ||
1649 | opt->type = type; | |
1650 | opt->len = len; | |
1651 | ||
1652 | switch (len) { | |
1653 | case 1: | |
1654 | *((u8 *) opt->val) = val; | |
1655 | break; | |
1656 | ||
1657 | case 2: | |
8e036fc3 | 1658 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
1659 | break; |
1660 | ||
1661 | case 4: | |
8e036fc3 | 1662 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
1663 | break; |
1664 | ||
1665 | default: | |
1666 | memcpy(opt->val, (void *) val, len); | |
1667 | break; | |
1668 | } | |
1669 | ||
1670 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
1671 | } | |
1672 | ||
1673 | static int l2cap_build_conf_req(struct sock *sk, void *data) | |
1674 | { | |
1675 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1676 | struct l2cap_conf_req *req = data; | |
1677 | void *ptr = req->data; | |
1678 | ||
1679 | BT_DBG("sk %p", sk); | |
1680 | ||
1681 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
1682 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
1683 | ||
1684 | /* FIXME: Need actual value of the flush timeout */ | |
1685 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
1686 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
1687 | ||
aca3192c YH |
1688 | req->dcid = cpu_to_le16(pi->dcid); |
1689 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
1690 | |
1691 | return ptr - data; | |
1692 | } | |
1693 | ||
5dee9e7c | 1694 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
1695 | { |
1696 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
1697 | struct l2cap_conf_rsp *rsp = data; |
1698 | void *ptr = rsp->data; | |
1699 | void *req = pi->conf_req; | |
1700 | int len = pi->conf_len; | |
1701 | int type, hint, olen; | |
1702 | unsigned long val; | |
6464f35f | 1703 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 1704 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 1705 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 1706 | |
5dee9e7c | 1707 | BT_DBG("sk %p", sk); |
820ae1b8 | 1708 | |
5dee9e7c MH |
1709 | while (len >= L2CAP_CONF_OPT_SIZE) { |
1710 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 1711 | |
5dee9e7c MH |
1712 | hint = type & 0x80; |
1713 | type &= 0x7f; | |
1714 | ||
1715 | switch (type) { | |
1716 | case L2CAP_CONF_MTU: | |
861d6882 | 1717 | mtu = val; |
5dee9e7c MH |
1718 | break; |
1719 | ||
1720 | case L2CAP_CONF_FLUSH_TO: | |
1721 | pi->flush_to = val; | |
1722 | break; | |
1723 | ||
1724 | case L2CAP_CONF_QOS: | |
1725 | break; | |
1726 | ||
6464f35f MH |
1727 | case L2CAP_CONF_RFC: |
1728 | if (olen == sizeof(rfc)) | |
1729 | memcpy(&rfc, (void *) val, olen); | |
1730 | break; | |
1731 | ||
5dee9e7c MH |
1732 | default: |
1733 | if (hint) | |
1734 | break; | |
1735 | ||
1736 | result = L2CAP_CONF_UNKNOWN; | |
1737 | *((u8 *) ptr++) = type; | |
1738 | break; | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | if (result == L2CAP_CONF_SUCCESS) { | |
1743 | /* Configure output options and let the other side know | |
1744 | * which ones we don't like. */ | |
1745 | ||
6464f35f MH |
1746 | if (rfc.mode == L2CAP_MODE_BASIC) { |
1747 | if (mtu < pi->omtu) | |
1748 | result = L2CAP_CONF_UNACCEPT; | |
1749 | else { | |
1750 | pi->omtu = mtu; | |
1751 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
1752 | } | |
1753 | ||
1754 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
1755 | } else { | |
5dee9e7c | 1756 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 1757 | |
6464f35f MH |
1758 | memset(&rfc, 0, sizeof(rfc)); |
1759 | rfc.mode = L2CAP_MODE_BASIC; | |
1760 | ||
1761 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
1762 | sizeof(rfc), (unsigned long) &rfc); | |
1763 | } | |
5dee9e7c MH |
1764 | } |
1765 | ||
1766 | rsp->scid = cpu_to_le16(pi->dcid); | |
1767 | rsp->result = cpu_to_le16(result); | |
1768 | rsp->flags = cpu_to_le16(0x0000); | |
1769 | ||
1770 | return ptr - data; | |
1da177e4 LT |
1771 | } |
1772 | ||
5dee9e7c | 1773 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
1774 | { |
1775 | struct l2cap_conf_rsp *rsp = data; | |
1776 | void *ptr = rsp->data; | |
1da177e4 | 1777 | |
5dee9e7c | 1778 | BT_DBG("sk %p", sk); |
1da177e4 | 1779 | |
aca3192c | 1780 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 1781 | rsp->result = cpu_to_le16(result); |
aca3192c | 1782 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
1783 | |
1784 | return ptr - data; | |
1785 | } | |
1786 | ||
4e8402a3 MH |
1787 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1788 | { | |
1789 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
1790 | ||
1791 | if (rej->reason != 0x0000) | |
1792 | return 0; | |
1793 | ||
1794 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
1795 | cmd->ident == conn->info_ident) { | |
1796 | conn->info_ident = 0; | |
1797 | del_timer(&conn->info_timer); | |
984947dc MH |
1798 | |
1799 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
1800 | ||
4e8402a3 MH |
1801 | l2cap_conn_start(conn); |
1802 | } | |
1803 | ||
1804 | return 0; | |
1805 | } | |
1806 | ||
1da177e4 LT |
1807 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1808 | { | |
1809 | struct l2cap_chan_list *list = &conn->chan_list; | |
1810 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
1811 | struct l2cap_conn_rsp rsp; | |
1812 | struct sock *sk, *parent; | |
e7c29cb1 | 1813 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
1814 | |
1815 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 1816 | __le16 psm = req->psm; |
1da177e4 LT |
1817 | |
1818 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
1819 | ||
1820 | /* Check if we have socket listening on psm */ | |
1821 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
1822 | if (!parent) { | |
1823 | result = L2CAP_CR_BAD_PSM; | |
1824 | goto sendresp; | |
1825 | } | |
1826 | ||
e7c29cb1 MH |
1827 | /* Check if the ACL is secure enough (if not SDP) */ |
1828 | if (psm != cpu_to_le16(0x0001) && | |
1829 | !hci_conn_check_link_mode(conn->hcon)) { | |
1830 | result = L2CAP_CR_SEC_BLOCK; | |
1831 | goto response; | |
1832 | } | |
1833 | ||
1da177e4 LT |
1834 | result = L2CAP_CR_NO_MEM; |
1835 | ||
1836 | /* Check for backlog size */ | |
1837 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 1838 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
1839 | goto response; |
1840 | } | |
1841 | ||
3b1e0a65 | 1842 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
1843 | if (!sk) |
1844 | goto response; | |
1845 | ||
fd1278d7 | 1846 | write_lock_bh(&list->lock); |
1da177e4 LT |
1847 | |
1848 | /* Check if we already have channel with that dcid */ | |
1849 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 1850 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1851 | sock_set_flag(sk, SOCK_ZAPPED); |
1852 | l2cap_sock_kill(sk); | |
1853 | goto response; | |
1854 | } | |
1855 | ||
1856 | hci_conn_hold(conn->hcon); | |
1857 | ||
1858 | l2cap_sock_init(sk, parent); | |
1859 | bacpy(&bt_sk(sk)->src, conn->src); | |
1860 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
1861 | l2cap_pi(sk)->psm = psm; | |
1862 | l2cap_pi(sk)->dcid = scid; | |
1863 | ||
1864 | __l2cap_chan_add(conn, sk, parent); | |
1865 | dcid = l2cap_pi(sk)->scid; | |
1866 | ||
1867 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1868 | ||
1da177e4 LT |
1869 | l2cap_pi(sk)->ident = cmd->ident; |
1870 | ||
984947dc | 1871 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
2af6b9d5 | 1872 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
1873 | if (bt_sk(sk)->defer_setup) { |
1874 | sk->sk_state = BT_CONNECT2; | |
1875 | result = L2CAP_CR_PEND; | |
1876 | status = L2CAP_CS_AUTHOR_PEND; | |
1877 | parent->sk_data_ready(parent, 0); | |
1878 | } else { | |
1879 | sk->sk_state = BT_CONFIG; | |
1880 | result = L2CAP_CR_SUCCESS; | |
1881 | status = L2CAP_CS_NO_INFO; | |
1882 | } | |
79d554a6 MH |
1883 | } else { |
1884 | sk->sk_state = BT_CONNECT2; | |
1885 | result = L2CAP_CR_PEND; | |
1886 | status = L2CAP_CS_AUTHEN_PEND; | |
1887 | } | |
1888 | } else { | |
1889 | sk->sk_state = BT_CONNECT2; | |
1890 | result = L2CAP_CR_PEND; | |
1891 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
1892 | } |
1893 | ||
fd1278d7 | 1894 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1895 | |
1896 | response: | |
1897 | bh_unlock_sock(parent); | |
1898 | ||
1899 | sendresp: | |
aca3192c YH |
1900 | rsp.scid = cpu_to_le16(scid); |
1901 | rsp.dcid = cpu_to_le16(dcid); | |
1902 | rsp.result = cpu_to_le16(result); | |
1903 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 1904 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
1905 | |
1906 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
1907 | struct l2cap_info_req info; | |
1908 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
1909 | ||
1910 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
1911 | conn->info_ident = l2cap_get_ident(conn); | |
1912 | ||
1913 | mod_timer(&conn->info_timer, jiffies + | |
1914 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
1915 | ||
1916 | l2cap_send_cmd(conn, conn->info_ident, | |
1917 | L2CAP_INFO_REQ, sizeof(info), &info); | |
1918 | } | |
1919 | ||
1da177e4 LT |
1920 | return 0; |
1921 | } | |
1922 | ||
1923 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1924 | { | |
1925 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
1926 | u16 scid, dcid, result, status; | |
1927 | struct sock *sk; | |
1928 | u8 req[128]; | |
1929 | ||
1930 | scid = __le16_to_cpu(rsp->scid); | |
1931 | dcid = __le16_to_cpu(rsp->dcid); | |
1932 | result = __le16_to_cpu(rsp->result); | |
1933 | status = __le16_to_cpu(rsp->status); | |
1934 | ||
1935 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
1936 | ||
1937 | if (scid) { | |
1938 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1939 | return 0; | |
1940 | } else { | |
1941 | if (!(sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident))) | |
1942 | return 0; | |
1943 | } | |
1944 | ||
1945 | switch (result) { | |
1946 | case L2CAP_CR_SUCCESS: | |
1947 | sk->sk_state = BT_CONFIG; | |
1948 | l2cap_pi(sk)->ident = 0; | |
1949 | l2cap_pi(sk)->dcid = dcid; | |
1950 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
1951 | ||
6a8d3010 MH |
1952 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
1953 | ||
1da177e4 LT |
1954 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
1955 | l2cap_build_conf_req(sk, req), req); | |
1956 | break; | |
1957 | ||
1958 | case L2CAP_CR_PEND: | |
6a8d3010 | 1959 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 LT |
1960 | break; |
1961 | ||
1962 | default: | |
1963 | l2cap_chan_del(sk, ECONNREFUSED); | |
1964 | break; | |
1965 | } | |
1966 | ||
1967 | bh_unlock_sock(sk); | |
1968 | return 0; | |
1969 | } | |
1970 | ||
88219a0f | 1971 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
1972 | { |
1973 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
1974 | u16 dcid, flags; | |
1975 | u8 rsp[64]; | |
1976 | struct sock *sk; | |
5dee9e7c | 1977 | int len; |
1da177e4 LT |
1978 | |
1979 | dcid = __le16_to_cpu(req->dcid); | |
1980 | flags = __le16_to_cpu(req->flags); | |
1981 | ||
1982 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
1983 | ||
1984 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
1985 | return -ENOENT; | |
1986 | ||
354f60a9 MH |
1987 | if (sk->sk_state == BT_DISCONN) |
1988 | goto unlock; | |
1989 | ||
5dee9e7c | 1990 | /* Reject if config buffer is too small. */ |
88219a0f | 1991 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
1992 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
1993 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
1994 | l2cap_build_conf_rsp(sk, rsp, | |
1995 | L2CAP_CONF_REJECT, flags), rsp); | |
1996 | goto unlock; | |
1997 | } | |
1998 | ||
1999 | /* Store config. */ | |
2000 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
2001 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
2002 | |
2003 | if (flags & 0x0001) { | |
2004 | /* Incomplete config. Send empty response. */ | |
2005 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
2006 | l2cap_build_conf_rsp(sk, rsp, |
2007 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
2008 | goto unlock; |
2009 | } | |
2010 | ||
2011 | /* Complete config. */ | |
5dee9e7c MH |
2012 | len = l2cap_parse_conf_req(sk, rsp); |
2013 | if (len < 0) | |
1da177e4 LT |
2014 | goto unlock; |
2015 | ||
5dee9e7c MH |
2016 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
2017 | ||
5dee9e7c MH |
2018 | /* Reset config buffer. */ |
2019 | l2cap_pi(sk)->conf_len = 0; | |
2020 | ||
876d9484 MH |
2021 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
2022 | goto unlock; | |
2023 | ||
1da177e4 LT |
2024 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
2025 | sk->sk_state = BT_CONNECTED; | |
2026 | l2cap_chan_ready(sk); | |
876d9484 MH |
2027 | goto unlock; |
2028 | } | |
2029 | ||
2030 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 2031 | u8 buf[64]; |
1da177e4 | 2032 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 2033 | l2cap_build_conf_req(sk, buf), buf); |
1da177e4 LT |
2034 | } |
2035 | ||
2036 | unlock: | |
2037 | bh_unlock_sock(sk); | |
2038 | return 0; | |
2039 | } | |
2040 | ||
2041 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2042 | { | |
2043 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
2044 | u16 scid, flags, result; | |
2045 | struct sock *sk; | |
2046 | ||
2047 | scid = __le16_to_cpu(rsp->scid); | |
2048 | flags = __le16_to_cpu(rsp->flags); | |
2049 | result = __le16_to_cpu(rsp->result); | |
2050 | ||
2051 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", scid, flags, result); | |
2052 | ||
2053 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
2054 | return 0; | |
2055 | ||
2056 | switch (result) { | |
2057 | case L2CAP_CONF_SUCCESS: | |
2058 | break; | |
2059 | ||
2060 | case L2CAP_CONF_UNACCEPT: | |
2061 | if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) { | |
2062 | char req[128]; | |
2063 | /* It does not make sense to adjust L2CAP parameters | |
2064 | * that are currently defined in the spec. We simply | |
2065 | * resend config request that we sent earlier. It is | |
2066 | * stupid, but it helps qualification testing which | |
2067 | * expects at least some response from us. */ | |
2068 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
2069 | l2cap_build_conf_req(sk, req), req); | |
2070 | goto done; | |
2071 | } | |
2072 | ||
8e87d142 | 2073 | default: |
1da177e4 | 2074 | sk->sk_state = BT_DISCONN; |
b1235d79 | 2075 | sk->sk_err = ECONNRESET; |
1da177e4 LT |
2076 | l2cap_sock_set_timer(sk, HZ * 5); |
2077 | { | |
2078 | struct l2cap_disconn_req req; | |
aca3192c YH |
2079 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
2080 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
2081 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
2082 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
2083 | } | |
2084 | goto done; | |
2085 | } | |
2086 | ||
2087 | if (flags & 0x01) | |
2088 | goto done; | |
2089 | ||
1da177e4 LT |
2090 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
2091 | ||
2092 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
2093 | sk->sk_state = BT_CONNECTED; | |
2094 | l2cap_chan_ready(sk); | |
2095 | } | |
2096 | ||
2097 | done: | |
2098 | bh_unlock_sock(sk); | |
2099 | return 0; | |
2100 | } | |
2101 | ||
2102 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2103 | { | |
2104 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
2105 | struct l2cap_disconn_rsp rsp; | |
2106 | u16 dcid, scid; | |
2107 | struct sock *sk; | |
2108 | ||
2109 | scid = __le16_to_cpu(req->scid); | |
2110 | dcid = __le16_to_cpu(req->dcid); | |
2111 | ||
2112 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
2113 | ||
2114 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
2115 | return 0; | |
2116 | ||
aca3192c YH |
2117 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
2118 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
2119 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
2120 | ||
2121 | sk->sk_shutdown = SHUTDOWN_MASK; | |
2122 | ||
2123 | l2cap_chan_del(sk, ECONNRESET); | |
2124 | bh_unlock_sock(sk); | |
2125 | ||
2126 | l2cap_sock_kill(sk); | |
2127 | return 0; | |
2128 | } | |
2129 | ||
2130 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2131 | { | |
2132 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
2133 | u16 dcid, scid; | |
2134 | struct sock *sk; | |
2135 | ||
2136 | scid = __le16_to_cpu(rsp->scid); | |
2137 | dcid = __le16_to_cpu(rsp->dcid); | |
2138 | ||
2139 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
2140 | ||
2141 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
2142 | return 0; | |
2143 | ||
2144 | l2cap_chan_del(sk, 0); | |
2145 | bh_unlock_sock(sk); | |
2146 | ||
2147 | l2cap_sock_kill(sk); | |
2148 | return 0; | |
2149 | } | |
2150 | ||
2151 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2152 | { | |
2153 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
2154 | u16 type; |
2155 | ||
2156 | type = __le16_to_cpu(req->type); | |
2157 | ||
2158 | BT_DBG("type 0x%4.4x", type); | |
2159 | ||
f0709e03 MH |
2160 | if (type == L2CAP_IT_FEAT_MASK) { |
2161 | u8 buf[8]; | |
2162 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
2163 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2164 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
2165 | put_unaligned(cpu_to_le32(l2cap_feat_mask), (__le32 *) rsp->data); | |
2166 | l2cap_send_cmd(conn, cmd->ident, | |
2167 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
2168 | } else { | |
2169 | struct l2cap_info_rsp rsp; | |
2170 | rsp.type = cpu_to_le16(type); | |
2171 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
2172 | l2cap_send_cmd(conn, cmd->ident, | |
2173 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
2174 | } | |
1da177e4 LT |
2175 | |
2176 | return 0; | |
2177 | } | |
2178 | ||
2179 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2180 | { | |
2181 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
2182 | u16 type, result; | |
2183 | ||
2184 | type = __le16_to_cpu(rsp->type); | |
2185 | result = __le16_to_cpu(rsp->result); | |
2186 | ||
2187 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
2188 | ||
4e8402a3 MH |
2189 | conn->info_ident = 0; |
2190 | ||
2191 | del_timer(&conn->info_timer); | |
2192 | ||
984947dc | 2193 | if (type == L2CAP_IT_FEAT_MASK) { |
83985319 | 2194 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 | 2195 | |
984947dc MH |
2196 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
2197 | ||
2198 | l2cap_conn_start(conn); | |
2199 | } | |
4e8402a3 | 2200 | |
1da177e4 LT |
2201 | return 0; |
2202 | } | |
2203 | ||
2204 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
2205 | { | |
2206 | u8 *data = skb->data; | |
2207 | int len = skb->len; | |
2208 | struct l2cap_cmd_hdr cmd; | |
2209 | int err = 0; | |
2210 | ||
2211 | l2cap_raw_recv(conn, skb); | |
2212 | ||
2213 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 2214 | u16 cmd_len; |
1da177e4 LT |
2215 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
2216 | data += L2CAP_CMD_HDR_SIZE; | |
2217 | len -= L2CAP_CMD_HDR_SIZE; | |
2218 | ||
88219a0f | 2219 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 2220 | |
88219a0f | 2221 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 2222 | |
88219a0f | 2223 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
2224 | BT_DBG("corrupted command"); |
2225 | break; | |
2226 | } | |
2227 | ||
2228 | switch (cmd.code) { | |
2229 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 2230 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
2231 | break; |
2232 | ||
2233 | case L2CAP_CONN_REQ: | |
2234 | err = l2cap_connect_req(conn, &cmd, data); | |
2235 | break; | |
2236 | ||
2237 | case L2CAP_CONN_RSP: | |
2238 | err = l2cap_connect_rsp(conn, &cmd, data); | |
2239 | break; | |
2240 | ||
2241 | case L2CAP_CONF_REQ: | |
88219a0f | 2242 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
2243 | break; |
2244 | ||
2245 | case L2CAP_CONF_RSP: | |
2246 | err = l2cap_config_rsp(conn, &cmd, data); | |
2247 | break; | |
2248 | ||
2249 | case L2CAP_DISCONN_REQ: | |
2250 | err = l2cap_disconnect_req(conn, &cmd, data); | |
2251 | break; | |
2252 | ||
2253 | case L2CAP_DISCONN_RSP: | |
2254 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
2255 | break; | |
2256 | ||
2257 | case L2CAP_ECHO_REQ: | |
88219a0f | 2258 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
2259 | break; |
2260 | ||
2261 | case L2CAP_ECHO_RSP: | |
2262 | break; | |
2263 | ||
2264 | case L2CAP_INFO_REQ: | |
2265 | err = l2cap_information_req(conn, &cmd, data); | |
2266 | break; | |
2267 | ||
2268 | case L2CAP_INFO_RSP: | |
2269 | err = l2cap_information_rsp(conn, &cmd, data); | |
2270 | break; | |
2271 | ||
2272 | default: | |
2273 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
2274 | err = -EINVAL; | |
2275 | break; | |
2276 | } | |
2277 | ||
2278 | if (err) { | |
2279 | struct l2cap_cmd_rej rej; | |
2280 | BT_DBG("error %d", err); | |
2281 | ||
2282 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 2283 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
2284 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
2285 | } | |
2286 | ||
88219a0f AV |
2287 | data += cmd_len; |
2288 | len -= cmd_len; | |
1da177e4 LT |
2289 | } |
2290 | ||
2291 | kfree_skb(skb); | |
2292 | } | |
2293 | ||
2294 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) | |
2295 | { | |
2296 | struct sock *sk; | |
2297 | ||
2298 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
2299 | if (!sk) { | |
2300 | BT_DBG("unknown cid 0x%4.4x", cid); | |
2301 | goto drop; | |
2302 | } | |
2303 | ||
2304 | BT_DBG("sk %p, len %d", sk, skb->len); | |
2305 | ||
2306 | if (sk->sk_state != BT_CONNECTED) | |
2307 | goto drop; | |
2308 | ||
2309 | if (l2cap_pi(sk)->imtu < skb->len) | |
2310 | goto drop; | |
2311 | ||
2312 | /* If socket recv buffers overflows we drop data here | |
2313 | * which is *bad* because L2CAP has to be reliable. | |
2314 | * But we don't have any other choice. L2CAP doesn't | |
2315 | * provide flow control mechanism. */ | |
2316 | ||
2317 | if (!sock_queue_rcv_skb(sk, skb)) | |
2318 | goto done; | |
2319 | ||
2320 | drop: | |
2321 | kfree_skb(skb); | |
2322 | ||
2323 | done: | |
0139418c MH |
2324 | if (sk) |
2325 | bh_unlock_sock(sk); | |
2326 | ||
1da177e4 LT |
2327 | return 0; |
2328 | } | |
2329 | ||
8e036fc3 | 2330 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
2331 | { |
2332 | struct sock *sk; | |
2333 | ||
2334 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
2335 | if (!sk) | |
2336 | goto drop; | |
2337 | ||
2338 | BT_DBG("sk %p, len %d", sk, skb->len); | |
2339 | ||
2340 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
2341 | goto drop; | |
2342 | ||
2343 | if (l2cap_pi(sk)->imtu < skb->len) | |
2344 | goto drop; | |
2345 | ||
2346 | if (!sock_queue_rcv_skb(sk, skb)) | |
2347 | goto done; | |
2348 | ||
2349 | drop: | |
2350 | kfree_skb(skb); | |
2351 | ||
2352 | done: | |
2353 | if (sk) bh_unlock_sock(sk); | |
2354 | return 0; | |
2355 | } | |
2356 | ||
2357 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
2358 | { | |
2359 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
2360 | u16 cid, len; |
2361 | __le16 psm; | |
1da177e4 LT |
2362 | |
2363 | skb_pull(skb, L2CAP_HDR_SIZE); | |
2364 | cid = __le16_to_cpu(lh->cid); | |
2365 | len = __le16_to_cpu(lh->len); | |
2366 | ||
2367 | BT_DBG("len %d, cid 0x%4.4x", len, cid); | |
2368 | ||
2369 | switch (cid) { | |
2370 | case 0x0001: | |
2371 | l2cap_sig_channel(conn, skb); | |
2372 | break; | |
2373 | ||
2374 | case 0x0002: | |
8e036fc3 | 2375 | psm = get_unaligned((__le16 *) skb->data); |
1da177e4 LT |
2376 | skb_pull(skb, 2); |
2377 | l2cap_conless_channel(conn, psm, skb); | |
2378 | break; | |
2379 | ||
2380 | default: | |
2381 | l2cap_data_channel(conn, cid, skb); | |
2382 | break; | |
2383 | } | |
2384 | } | |
2385 | ||
2386 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
2387 | ||
2388 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
2389 | { | |
2390 | int exact = 0, lm1 = 0, lm2 = 0; | |
2391 | register struct sock *sk; | |
2392 | struct hlist_node *node; | |
2393 | ||
2394 | if (type != ACL_LINK) | |
2395 | return 0; | |
2396 | ||
2397 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
2398 | ||
2399 | /* Find listening sockets and check their link_mode */ | |
2400 | read_lock(&l2cap_sk_list.lock); | |
2401 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
2402 | if (sk->sk_state != BT_LISTEN) | |
2403 | continue; | |
2404 | ||
2405 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
2406 | lm1 |= HCI_LM_ACCEPT; |
2407 | if (l2cap_pi(sk)->role_switch) | |
2408 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 2409 | exact++; |
2af6b9d5 MH |
2410 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
2411 | lm2 |= HCI_LM_ACCEPT; | |
2412 | if (l2cap_pi(sk)->role_switch) | |
2413 | lm2 |= HCI_LM_MASTER; | |
2414 | } | |
1da177e4 LT |
2415 | } |
2416 | read_unlock(&l2cap_sk_list.lock); | |
2417 | ||
2418 | return exact ? lm1 : lm2; | |
2419 | } | |
2420 | ||
2421 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
2422 | { | |
0139418c MH |
2423 | struct l2cap_conn *conn; |
2424 | ||
1da177e4 LT |
2425 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
2426 | ||
2427 | if (hcon->type != ACL_LINK) | |
2428 | return 0; | |
2429 | ||
2430 | if (!status) { | |
1da177e4 LT |
2431 | conn = l2cap_conn_add(hcon, status); |
2432 | if (conn) | |
2433 | l2cap_conn_ready(conn); | |
0139418c | 2434 | } else |
1da177e4 LT |
2435 | l2cap_conn_del(hcon, bt_err(status)); |
2436 | ||
2437 | return 0; | |
2438 | } | |
2439 | ||
2440 | static int l2cap_disconn_ind(struct hci_conn *hcon, u8 reason) | |
2441 | { | |
2442 | BT_DBG("hcon %p reason %d", hcon, reason); | |
2443 | ||
2444 | if (hcon->type != ACL_LINK) | |
2445 | return 0; | |
2446 | ||
2447 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 2448 | |
1da177e4 LT |
2449 | return 0; |
2450 | } | |
2451 | ||
f62e4323 MH |
2452 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
2453 | { | |
255c7601 MH |
2454 | if (sk->sk_type != SOCK_SEQPACKET) |
2455 | return; | |
2456 | ||
f62e4323 MH |
2457 | if (encrypt == 0x00) { |
2458 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { | |
2459 | l2cap_sock_clear_timer(sk); | |
2460 | l2cap_sock_set_timer(sk, HZ * 5); | |
2461 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
2462 | __l2cap_sock_close(sk, ECONNREFUSED); | |
2463 | } else { | |
2464 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) | |
2465 | l2cap_sock_clear_timer(sk); | |
2466 | } | |
2467 | } | |
2468 | ||
8c1b2355 | 2469 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
2470 | { |
2471 | struct l2cap_chan_list *l; | |
0139418c | 2472 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 2473 | struct sock *sk; |
1da177e4 | 2474 | |
0139418c | 2475 | if (!conn) |
1da177e4 | 2476 | return 0; |
0139418c | 2477 | |
1da177e4 LT |
2478 | l = &conn->chan_list; |
2479 | ||
2480 | BT_DBG("conn %p", conn); | |
2481 | ||
2482 | read_lock(&l->lock); | |
2483 | ||
2484 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2485 | bh_lock_sock(sk); | |
2486 | ||
6a8d3010 MH |
2487 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
2488 | bh_unlock_sock(sk); | |
2489 | continue; | |
2490 | } | |
2491 | ||
f62e4323 | 2492 | if (!status && (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 2493 | sk->sk_state == BT_CONFIG)) { |
f62e4323 | 2494 | l2cap_check_encryption(sk, encrypt); |
9719f8af MH |
2495 | bh_unlock_sock(sk); |
2496 | continue; | |
2497 | } | |
2498 | ||
b1235d79 MH |
2499 | if (sk->sk_state == BT_CONNECT) { |
2500 | if (!status) { | |
2501 | struct l2cap_conn_req req; | |
2502 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2503 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 2504 | |
b1235d79 | 2505 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
1da177e4 | 2506 | |
b1235d79 MH |
2507 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2508 | L2CAP_CONN_REQ, sizeof(req), &req); | |
2509 | } else { | |
2510 | l2cap_sock_clear_timer(sk); | |
2511 | l2cap_sock_set_timer(sk, HZ / 10); | |
2512 | } | |
2513 | } else if (sk->sk_state == BT_CONNECT2) { | |
2514 | struct l2cap_conn_rsp rsp; | |
2515 | __u16 result; | |
1da177e4 | 2516 | |
b1235d79 MH |
2517 | if (!status) { |
2518 | sk->sk_state = BT_CONFIG; | |
2519 | result = L2CAP_CR_SUCCESS; | |
2520 | } else { | |
2521 | sk->sk_state = BT_DISCONN; | |
2522 | l2cap_sock_set_timer(sk, HZ / 10); | |
2523 | result = L2CAP_CR_SEC_BLOCK; | |
2524 | } | |
2525 | ||
2526 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
2527 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2528 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 2529 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
2530 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2531 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
2532 | } | |
1da177e4 LT |
2533 | |
2534 | bh_unlock_sock(sk); | |
2535 | } | |
2536 | ||
2537 | read_unlock(&l->lock); | |
b1235d79 | 2538 | |
1da177e4 LT |
2539 | return 0; |
2540 | } | |
2541 | ||
2542 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
2543 | { | |
2544 | struct l2cap_conn *conn = hcon->l2cap_data; | |
2545 | ||
2546 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
2547 | goto drop; | |
2548 | ||
2549 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
2550 | ||
2551 | if (flags & ACL_START) { | |
2552 | struct l2cap_hdr *hdr; | |
2553 | int len; | |
2554 | ||
2555 | if (conn->rx_len) { | |
2556 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
2557 | kfree_skb(conn->rx_skb); | |
2558 | conn->rx_skb = NULL; | |
2559 | conn->rx_len = 0; | |
2560 | l2cap_conn_unreliable(conn, ECOMM); | |
2561 | } | |
2562 | ||
2563 | if (skb->len < 2) { | |
2564 | BT_ERR("Frame is too short (len %d)", skb->len); | |
2565 | l2cap_conn_unreliable(conn, ECOMM); | |
2566 | goto drop; | |
2567 | } | |
2568 | ||
2569 | hdr = (struct l2cap_hdr *) skb->data; | |
2570 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
2571 | ||
2572 | if (len == skb->len) { | |
2573 | /* Complete frame received */ | |
2574 | l2cap_recv_frame(conn, skb); | |
2575 | return 0; | |
2576 | } | |
2577 | ||
2578 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
2579 | ||
2580 | if (skb->len > len) { | |
2581 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
2582 | skb->len, len); | |
2583 | l2cap_conn_unreliable(conn, ECOMM); | |
2584 | goto drop; | |
2585 | } | |
2586 | ||
2587 | /* Allocate skb for the complete frame (with header) */ | |
2588 | if (!(conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC))) | |
2589 | goto drop; | |
2590 | ||
d626f62b ACM |
2591 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
2592 | skb->len); | |
1da177e4 LT |
2593 | conn->rx_len = len - skb->len; |
2594 | } else { | |
2595 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
2596 | ||
2597 | if (!conn->rx_len) { | |
2598 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
2599 | l2cap_conn_unreliable(conn, ECOMM); | |
2600 | goto drop; | |
2601 | } | |
2602 | ||
2603 | if (skb->len > conn->rx_len) { | |
2604 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
2605 | skb->len, conn->rx_len); | |
2606 | kfree_skb(conn->rx_skb); | |
2607 | conn->rx_skb = NULL; | |
2608 | conn->rx_len = 0; | |
2609 | l2cap_conn_unreliable(conn, ECOMM); | |
2610 | goto drop; | |
2611 | } | |
2612 | ||
d626f62b ACM |
2613 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
2614 | skb->len); | |
1da177e4 LT |
2615 | conn->rx_len -= skb->len; |
2616 | ||
2617 | if (!conn->rx_len) { | |
2618 | /* Complete frame received */ | |
2619 | l2cap_recv_frame(conn, conn->rx_skb); | |
2620 | conn->rx_skb = NULL; | |
2621 | } | |
2622 | } | |
2623 | ||
2624 | drop: | |
2625 | kfree_skb(skb); | |
2626 | return 0; | |
2627 | } | |
2628 | ||
be9d1227 | 2629 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
2630 | { |
2631 | struct sock *sk; | |
2632 | struct hlist_node *node; | |
be9d1227 | 2633 | char *str = buf; |
1da177e4 LT |
2634 | |
2635 | read_lock_bh(&l2cap_sk_list.lock); | |
2636 | ||
be9d1227 MH |
2637 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
2638 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1da177e4 | 2639 | |
2af6b9d5 | 2640 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
be9d1227 | 2641 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), |
73863976 | 2642 | sk->sk_state, btohs(pi->psm), pi->scid, pi->dcid, |
2af6b9d5 | 2643 | pi->imtu, pi->omtu, pi->sec_level); |
be9d1227 | 2644 | } |
1da177e4 | 2645 | |
1da177e4 | 2646 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 2647 | |
be9d1227 | 2648 | return (str - buf); |
1da177e4 LT |
2649 | } |
2650 | ||
be9d1227 | 2651 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
1da177e4 | 2652 | |
90ddc4f0 | 2653 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
2654 | .family = PF_BLUETOOTH, |
2655 | .owner = THIS_MODULE, | |
2656 | .release = l2cap_sock_release, | |
2657 | .bind = l2cap_sock_bind, | |
2658 | .connect = l2cap_sock_connect, | |
2659 | .listen = l2cap_sock_listen, | |
2660 | .accept = l2cap_sock_accept, | |
2661 | .getname = l2cap_sock_getname, | |
2662 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 2663 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 2664 | .poll = bt_sock_poll, |
3241ad82 | 2665 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
2666 | .mmap = sock_no_mmap, |
2667 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
2668 | .shutdown = l2cap_sock_shutdown, |
2669 | .setsockopt = l2cap_sock_setsockopt, | |
2670 | .getsockopt = l2cap_sock_getsockopt | |
2671 | }; | |
2672 | ||
2673 | static struct net_proto_family l2cap_sock_family_ops = { | |
2674 | .family = PF_BLUETOOTH, | |
2675 | .owner = THIS_MODULE, | |
2676 | .create = l2cap_sock_create, | |
2677 | }; | |
2678 | ||
2679 | static struct hci_proto l2cap_hci_proto = { | |
2680 | .name = "L2CAP", | |
2681 | .id = HCI_PROTO_L2CAP, | |
2682 | .connect_ind = l2cap_connect_ind, | |
2683 | .connect_cfm = l2cap_connect_cfm, | |
2684 | .disconn_ind = l2cap_disconn_ind, | |
8c1b2355 | 2685 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
2686 | .recv_acldata = l2cap_recv_acldata |
2687 | }; | |
2688 | ||
2689 | static int __init l2cap_init(void) | |
2690 | { | |
2691 | int err; | |
be9d1227 | 2692 | |
1da177e4 LT |
2693 | err = proto_register(&l2cap_proto, 0); |
2694 | if (err < 0) | |
2695 | return err; | |
2696 | ||
2697 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
2698 | if (err < 0) { | |
2699 | BT_ERR("L2CAP socket registration failed"); | |
2700 | goto error; | |
2701 | } | |
2702 | ||
2703 | err = hci_register_proto(&l2cap_hci_proto); | |
2704 | if (err < 0) { | |
2705 | BT_ERR("L2CAP protocol registration failed"); | |
2706 | bt_sock_unregister(BTPROTO_L2CAP); | |
2707 | goto error; | |
2708 | } | |
2709 | ||
df5c37ea MH |
2710 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
2711 | BT_ERR("Failed to create L2CAP info file"); | |
1da177e4 LT |
2712 | |
2713 | BT_INFO("L2CAP ver %s", VERSION); | |
2714 | BT_INFO("L2CAP socket layer initialized"); | |
2715 | ||
2716 | return 0; | |
2717 | ||
2718 | error: | |
2719 | proto_unregister(&l2cap_proto); | |
2720 | return err; | |
2721 | } | |
2722 | ||
2723 | static void __exit l2cap_exit(void) | |
2724 | { | |
a91f2e39 | 2725 | class_remove_file(bt_class, &class_attr_l2cap); |
1da177e4 LT |
2726 | |
2727 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
2728 | BT_ERR("L2CAP socket unregistration failed"); | |
2729 | ||
2730 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
2731 | BT_ERR("L2CAP protocol unregistration failed"); | |
2732 | ||
2733 | proto_unregister(&l2cap_proto); | |
2734 | } | |
2735 | ||
2736 | void l2cap_load(void) | |
2737 | { | |
2738 | /* Dummy function to trigger automatic L2CAP module loading by | |
2739 | * other modules that use L2CAP sockets but don't use any other | |
2740 | * symbols from it. */ | |
2741 | return; | |
2742 | } | |
2743 | EXPORT_SYMBOL(l2cap_load); | |
2744 | ||
2745 | module_init(l2cap_init); | |
2746 | module_exit(l2cap_exit); | |
2747 | ||
63fbd24e | 2748 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
2749 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
2750 | MODULE_VERSION(VERSION); | |
2751 | MODULE_LICENSE("GPL"); | |
2752 | MODULE_ALIAS("bt-proto-0"); |