Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth L2CAP core and sockets. */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
4fc268d2 | 30 | #include <linux/capability.h> |
1da177e4 LT |
31 | #include <linux/errno.h> |
32 | #include <linux/kernel.h> | |
1da177e4 LT |
33 | #include <linux/sched.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/fcntl.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/socket.h> | |
40 | #include <linux/skbuff.h> | |
1da177e4 | 41 | #include <linux/list.h> |
be9d1227 | 42 | #include <linux/device.h> |
1da177e4 LT |
43 | #include <net/sock.h> |
44 | ||
45 | #include <asm/system.h> | |
46 | #include <asm/uaccess.h> | |
47 | #include <asm/unaligned.h> | |
48 | ||
49 | #include <net/bluetooth/bluetooth.h> | |
50 | #include <net/bluetooth/hci_core.h> | |
51 | #include <net/bluetooth/l2cap.h> | |
52 | ||
e1027a7c | 53 | #define VERSION "2.13" |
f0709e03 | 54 | |
e1027a7c MH |
55 | static u32 l2cap_feat_mask = 0x0080; |
56 | static u8 l2cap_fixed_chan[8] = { 0x02, }; | |
1da177e4 | 57 | |
90ddc4f0 | 58 | static const struct proto_ops l2cap_sock_ops; |
1da177e4 LT |
59 | |
60 | static struct bt_sock_list l2cap_sk_list = { | |
d5fb2962 | 61 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
1da177e4 LT |
62 | }; |
63 | ||
1da177e4 LT |
64 | static void __l2cap_sock_close(struct sock *sk, int reason); |
65 | static void l2cap_sock_close(struct sock *sk); | |
66 | static void l2cap_sock_kill(struct sock *sk); | |
67 | ||
68 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
69 | u8 code, u8 ident, u16 dlen, void *data); | |
70 | ||
71 | /* ---- L2CAP timers ---- */ | |
72 | static void l2cap_sock_timeout(unsigned long arg) | |
73 | { | |
74 | struct sock *sk = (struct sock *) arg; | |
b1235d79 | 75 | int reason; |
1da177e4 LT |
76 | |
77 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
78 | ||
79 | bh_lock_sock(sk); | |
b1235d79 | 80 | |
f62e4323 MH |
81 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
82 | reason = ECONNREFUSED; | |
83 | else if (sk->sk_state == BT_CONNECT && | |
2af6b9d5 | 84 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
b1235d79 MH |
85 | reason = ECONNREFUSED; |
86 | else | |
87 | reason = ETIMEDOUT; | |
88 | ||
89 | __l2cap_sock_close(sk, reason); | |
90 | ||
1da177e4 LT |
91 | bh_unlock_sock(sk); |
92 | ||
93 | l2cap_sock_kill(sk); | |
94 | sock_put(sk); | |
95 | } | |
96 | ||
97 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
98 | { | |
99 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
100 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
101 | } | |
102 | ||
103 | static void l2cap_sock_clear_timer(struct sock *sk) | |
104 | { | |
105 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
106 | sk_stop_timer(sk, &sk->sk_timer); | |
107 | } | |
108 | ||
0139418c MH |
109 | /* ---- L2CAP channels ---- */ |
110 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
111 | { | |
112 | struct sock *s; | |
113 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
114 | if (l2cap_pi(s)->dcid == cid) | |
115 | break; | |
116 | } | |
117 | return s; | |
118 | } | |
119 | ||
120 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
121 | { | |
122 | struct sock *s; | |
123 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
124 | if (l2cap_pi(s)->scid == cid) | |
125 | break; | |
126 | } | |
127 | return s; | |
128 | } | |
129 | ||
130 | /* Find channel with given SCID. | |
131 | * Returns locked socket */ | |
132 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
133 | { | |
134 | struct sock *s; | |
135 | read_lock(&l->lock); | |
136 | s = __l2cap_get_chan_by_scid(l, cid); | |
137 | if (s) bh_lock_sock(s); | |
138 | read_unlock(&l->lock); | |
139 | return s; | |
140 | } | |
141 | ||
142 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
143 | { | |
144 | struct sock *s; | |
145 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
146 | if (l2cap_pi(s)->ident == ident) | |
147 | break; | |
148 | } | |
149 | return s; | |
150 | } | |
151 | ||
152 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
153 | { | |
154 | struct sock *s; | |
155 | read_lock(&l->lock); | |
156 | s = __l2cap_get_chan_by_ident(l, ident); | |
157 | if (s) bh_lock_sock(s); | |
158 | read_unlock(&l->lock); | |
159 | return s; | |
160 | } | |
161 | ||
162 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
163 | { | |
164 | u16 cid = 0x0040; | |
165 | ||
166 | for (; cid < 0xffff; cid++) { | |
167 | if(!__l2cap_get_chan_by_scid(l, cid)) | |
168 | return cid; | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
175 | { | |
176 | sock_hold(sk); | |
177 | ||
178 | if (l->head) | |
179 | l2cap_pi(l->head)->prev_c = sk; | |
180 | ||
181 | l2cap_pi(sk)->next_c = l->head; | |
182 | l2cap_pi(sk)->prev_c = NULL; | |
183 | l->head = sk; | |
184 | } | |
185 | ||
186 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
187 | { | |
188 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
189 | ||
fd1278d7 | 190 | write_lock_bh(&l->lock); |
0139418c MH |
191 | if (sk == l->head) |
192 | l->head = next; | |
193 | ||
194 | if (next) | |
195 | l2cap_pi(next)->prev_c = prev; | |
196 | if (prev) | |
197 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 198 | write_unlock_bh(&l->lock); |
0139418c MH |
199 | |
200 | __sock_put(sk); | |
201 | } | |
202 | ||
203 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
204 | { | |
205 | struct l2cap_chan_list *l = &conn->chan_list; | |
206 | ||
207 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
208 | ||
2950f21a MH |
209 | conn->disc_reason = 0x13; |
210 | ||
0139418c MH |
211 | l2cap_pi(sk)->conn = conn; |
212 | ||
213 | if (sk->sk_type == SOCK_SEQPACKET) { | |
214 | /* Alloc CID for connection-oriented socket */ | |
215 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
216 | } else if (sk->sk_type == SOCK_DGRAM) { | |
217 | /* Connectionless socket */ | |
218 | l2cap_pi(sk)->scid = 0x0002; | |
219 | l2cap_pi(sk)->dcid = 0x0002; | |
220 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
221 | } else { | |
222 | /* Raw socket can send/recv signalling messages only */ | |
223 | l2cap_pi(sk)->scid = 0x0001; | |
224 | l2cap_pi(sk)->dcid = 0x0001; | |
225 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; | |
226 | } | |
227 | ||
228 | __l2cap_chan_link(l, sk); | |
229 | ||
230 | if (parent) | |
231 | bt_accept_enqueue(parent, sk); | |
232 | } | |
233 | ||
8e87d142 | 234 | /* Delete channel. |
0139418c MH |
235 | * Must be called on the locked socket. */ |
236 | static void l2cap_chan_del(struct sock *sk, int err) | |
237 | { | |
238 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
239 | struct sock *parent = bt_sk(sk)->parent; | |
240 | ||
241 | l2cap_sock_clear_timer(sk); | |
242 | ||
243 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
244 | ||
8e87d142 | 245 | if (conn) { |
0139418c MH |
246 | /* Unlink from channel list */ |
247 | l2cap_chan_unlink(&conn->chan_list, sk); | |
248 | l2cap_pi(sk)->conn = NULL; | |
249 | hci_conn_put(conn->hcon); | |
250 | } | |
251 | ||
b1235d79 | 252 | sk->sk_state = BT_CLOSED; |
0139418c MH |
253 | sock_set_flag(sk, SOCK_ZAPPED); |
254 | ||
255 | if (err) | |
256 | sk->sk_err = err; | |
257 | ||
258 | if (parent) { | |
259 | bt_accept_unlink(sk); | |
260 | parent->sk_data_ready(parent, 0); | |
261 | } else | |
262 | sk->sk_state_change(sk); | |
263 | } | |
264 | ||
79d554a6 | 265 | /* Service level security */ |
2af6b9d5 | 266 | static inline int l2cap_check_security(struct sock *sk) |
79d554a6 MH |
267 | { |
268 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
0684e5f9 MH |
269 | __u8 auth_type; |
270 | ||
00ae4af9 MH |
271 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
272 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
273 | auth_type = HCI_AT_NO_BONDING_MITM; | |
274 | else | |
275 | auth_type = HCI_AT_NO_BONDING; | |
276 | ||
277 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
278 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
279 | } else { | |
280 | switch (l2cap_pi(sk)->sec_level) { | |
281 | case BT_SECURITY_HIGH: | |
282 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
283 | break; | |
284 | case BT_SECURITY_MEDIUM: | |
285 | auth_type = HCI_AT_GENERAL_BONDING; | |
286 | break; | |
287 | default: | |
288 | auth_type = HCI_AT_NO_BONDING; | |
289 | break; | |
290 | } | |
0684e5f9 | 291 | } |
79d554a6 | 292 | |
0684e5f9 MH |
293 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
294 | auth_type); | |
79d554a6 MH |
295 | } |
296 | ||
4e8402a3 MH |
297 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
298 | { | |
299 | u8 id; | |
300 | ||
301 | /* Get next available identificator. | |
302 | * 1 - 128 are used by kernel. | |
303 | * 129 - 199 are reserved. | |
304 | * 200 - 254 are used by utilities like l2ping, etc. | |
305 | */ | |
306 | ||
307 | spin_lock_bh(&conn->lock); | |
308 | ||
309 | if (++conn->tx_ident > 128) | |
310 | conn->tx_ident = 1; | |
311 | ||
312 | id = conn->tx_ident; | |
313 | ||
314 | spin_unlock_bh(&conn->lock); | |
315 | ||
316 | return id; | |
317 | } | |
318 | ||
319 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) | |
320 | { | |
321 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
322 | ||
323 | BT_DBG("code 0x%2.2x", code); | |
324 | ||
325 | if (!skb) | |
326 | return -ENOMEM; | |
327 | ||
328 | return hci_send_acl(conn->hcon, skb, 0); | |
329 | } | |
330 | ||
79d554a6 MH |
331 | static void l2cap_do_start(struct sock *sk) |
332 | { | |
333 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
334 | ||
335 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
984947dc MH |
336 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
337 | return; | |
338 | ||
2af6b9d5 | 339 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
340 | struct l2cap_conn_req req; |
341 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
342 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 343 | |
b1235d79 | 344 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 345 | |
b1235d79 | 346 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 347 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 348 | } |
79d554a6 MH |
349 | } else { |
350 | struct l2cap_info_req req; | |
351 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
352 | ||
353 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
354 | conn->info_ident = l2cap_get_ident(conn); | |
355 | ||
356 | mod_timer(&conn->info_timer, jiffies + | |
357 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
358 | ||
359 | l2cap_send_cmd(conn, conn->info_ident, | |
360 | L2CAP_INFO_REQ, sizeof(req), &req); | |
361 | } | |
362 | } | |
363 | ||
1da177e4 | 364 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
365 | static void l2cap_conn_start(struct l2cap_conn *conn) |
366 | { | |
367 | struct l2cap_chan_list *l = &conn->chan_list; | |
368 | struct sock *sk; | |
369 | ||
370 | BT_DBG("conn %p", conn); | |
371 | ||
372 | read_lock(&l->lock); | |
373 | ||
374 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
375 | bh_lock_sock(sk); | |
376 | ||
377 | if (sk->sk_type != SOCK_SEQPACKET) { | |
79d554a6 MH |
378 | bh_unlock_sock(sk); |
379 | continue; | |
380 | } | |
381 | ||
382 | if (sk->sk_state == BT_CONNECT) { | |
2af6b9d5 | 383 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
384 | struct l2cap_conn_req req; |
385 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
386 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 387 | |
b1235d79 | 388 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 389 | |
b1235d79 | 390 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4e8402a3 | 391 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 392 | } |
79d554a6 MH |
393 | } else if (sk->sk_state == BT_CONNECT2) { |
394 | struct l2cap_conn_rsp rsp; | |
395 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
396 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
397 | ||
2af6b9d5 | 398 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
399 | if (bt_sk(sk)->defer_setup) { |
400 | struct sock *parent = bt_sk(sk)->parent; | |
401 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
402 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
403 | parent->sk_data_ready(parent, 0); | |
404 | ||
405 | } else { | |
406 | sk->sk_state = BT_CONFIG; | |
407 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
408 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
409 | } | |
79d554a6 MH |
410 | } else { |
411 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
412 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
413 | } | |
414 | ||
415 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
416 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4e8402a3 MH |
417 | } |
418 | ||
419 | bh_unlock_sock(sk); | |
420 | } | |
421 | ||
422 | read_unlock(&l->lock); | |
423 | } | |
424 | ||
425 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
426 | { | |
79d554a6 MH |
427 | struct l2cap_chan_list *l = &conn->chan_list; |
428 | struct sock *sk; | |
4e8402a3 | 429 | |
79d554a6 | 430 | BT_DBG("conn %p", conn); |
4e8402a3 | 431 | |
79d554a6 | 432 | read_lock(&l->lock); |
4e8402a3 | 433 | |
79d554a6 MH |
434 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
435 | bh_lock_sock(sk); | |
4e8402a3 | 436 | |
79d554a6 MH |
437 | if (sk->sk_type != SOCK_SEQPACKET) { |
438 | l2cap_sock_clear_timer(sk); | |
439 | sk->sk_state = BT_CONNECTED; | |
440 | sk->sk_state_change(sk); | |
441 | } else if (sk->sk_state == BT_CONNECT) | |
442 | l2cap_do_start(sk); | |
4e8402a3 | 443 | |
79d554a6 | 444 | bh_unlock_sock(sk); |
4e8402a3 | 445 | } |
79d554a6 MH |
446 | |
447 | read_unlock(&l->lock); | |
4e8402a3 MH |
448 | } |
449 | ||
450 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
451 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
452 | { | |
453 | struct l2cap_chan_list *l = &conn->chan_list; | |
454 | struct sock *sk; | |
455 | ||
456 | BT_DBG("conn %p", conn); | |
457 | ||
458 | read_lock(&l->lock); | |
459 | ||
460 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 461 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
462 | sk->sk_err = err; |
463 | } | |
464 | ||
465 | read_unlock(&l->lock); | |
466 | } | |
467 | ||
468 | static void l2cap_info_timeout(unsigned long arg) | |
469 | { | |
470 | struct l2cap_conn *conn = (void *) arg; | |
471 | ||
984947dc | 472 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 473 | conn->info_ident = 0; |
984947dc | 474 | |
4e8402a3 MH |
475 | l2cap_conn_start(conn); |
476 | } | |
477 | ||
1da177e4 LT |
478 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
479 | { | |
0139418c | 480 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 481 | |
0139418c | 482 | if (conn || status) |
1da177e4 LT |
483 | return conn; |
484 | ||
0139418c MH |
485 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
486 | if (!conn) | |
1da177e4 | 487 | return NULL; |
1da177e4 LT |
488 | |
489 | hcon->l2cap_data = conn; | |
490 | conn->hcon = hcon; | |
491 | ||
0139418c MH |
492 | BT_DBG("hcon %p conn %p", hcon, conn); |
493 | ||
1da177e4 LT |
494 | conn->mtu = hcon->hdev->acl_mtu; |
495 | conn->src = &hcon->hdev->bdaddr; | |
496 | conn->dst = &hcon->dst; | |
497 | ||
4e8402a3 MH |
498 | conn->feat_mask = 0; |
499 | ||
b1235d79 MH |
500 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
501 | (unsigned long) conn); | |
4e8402a3 | 502 | |
1da177e4 LT |
503 | spin_lock_init(&conn->lock); |
504 | rwlock_init(&conn->chan_list.lock); | |
505 | ||
2950f21a MH |
506 | conn->disc_reason = 0x13; |
507 | ||
1da177e4 LT |
508 | return conn; |
509 | } | |
510 | ||
0139418c | 511 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 512 | { |
0139418c | 513 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
514 | struct sock *sk; |
515 | ||
0139418c MH |
516 | if (!conn) |
517 | return; | |
1da177e4 LT |
518 | |
519 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
520 | ||
7585b97a | 521 | kfree_skb(conn->rx_skb); |
1da177e4 LT |
522 | |
523 | /* Kill channels */ | |
524 | while ((sk = conn->chan_list.head)) { | |
525 | bh_lock_sock(sk); | |
526 | l2cap_chan_del(sk, err); | |
527 | bh_unlock_sock(sk); | |
528 | l2cap_sock_kill(sk); | |
529 | } | |
530 | ||
8e8440f5 DY |
531 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
532 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 533 | |
1da177e4 LT |
534 | hcon->l2cap_data = NULL; |
535 | kfree(conn); | |
1da177e4 LT |
536 | } |
537 | ||
538 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
539 | { | |
540 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 541 | write_lock_bh(&l->lock); |
1da177e4 | 542 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 543 | write_unlock_bh(&l->lock); |
1da177e4 LT |
544 | } |
545 | ||
1da177e4 | 546 | /* ---- Socket interface ---- */ |
8e036fc3 | 547 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
548 | { |
549 | struct sock *sk; | |
550 | struct hlist_node *node; | |
551 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
552 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
553 | goto found; | |
554 | sk = NULL; | |
555 | found: | |
556 | return sk; | |
557 | } | |
558 | ||
559 | /* Find socket with psm and source bdaddr. | |
560 | * Returns closest match. | |
561 | */ | |
8e036fc3 | 562 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
563 | { |
564 | struct sock *sk = NULL, *sk1 = NULL; | |
565 | struct hlist_node *node; | |
566 | ||
567 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
568 | if (state && sk->sk_state != state) | |
569 | continue; | |
570 | ||
571 | if (l2cap_pi(sk)->psm == psm) { | |
572 | /* Exact match. */ | |
573 | if (!bacmp(&bt_sk(sk)->src, src)) | |
574 | break; | |
575 | ||
576 | /* Closest match */ | |
577 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
578 | sk1 = sk; | |
579 | } | |
580 | } | |
581 | return node ? sk : sk1; | |
582 | } | |
583 | ||
584 | /* Find socket with given address (psm, src). | |
585 | * Returns locked socket */ | |
8e036fc3 | 586 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
587 | { |
588 | struct sock *s; | |
589 | read_lock(&l2cap_sk_list.lock); | |
590 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
591 | if (s) bh_lock_sock(s); | |
592 | read_unlock(&l2cap_sk_list.lock); | |
593 | return s; | |
594 | } | |
595 | ||
596 | static void l2cap_sock_destruct(struct sock *sk) | |
597 | { | |
598 | BT_DBG("sk %p", sk); | |
599 | ||
600 | skb_queue_purge(&sk->sk_receive_queue); | |
601 | skb_queue_purge(&sk->sk_write_queue); | |
602 | } | |
603 | ||
604 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
605 | { | |
606 | struct sock *sk; | |
607 | ||
608 | BT_DBG("parent %p", parent); | |
609 | ||
610 | /* Close not yet accepted channels */ | |
611 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
612 | l2cap_sock_close(sk); | |
613 | ||
b1235d79 | 614 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
615 | sock_set_flag(parent, SOCK_ZAPPED); |
616 | } | |
617 | ||
618 | /* Kill socket (only if zapped and orphan) | |
619 | * Must be called on unlocked socket. | |
620 | */ | |
621 | static void l2cap_sock_kill(struct sock *sk) | |
622 | { | |
623 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
624 | return; | |
625 | ||
626 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
627 | ||
628 | /* Kill poor orphan */ | |
629 | bt_sock_unlink(&l2cap_sk_list, sk); | |
630 | sock_set_flag(sk, SOCK_DEAD); | |
631 | sock_put(sk); | |
632 | } | |
633 | ||
634 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
635 | { | |
636 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
637 | ||
638 | switch (sk->sk_state) { | |
639 | case BT_LISTEN: | |
640 | l2cap_sock_cleanup_listen(sk); | |
641 | break; | |
642 | ||
643 | case BT_CONNECTED: | |
644 | case BT_CONFIG: | |
1da177e4 LT |
645 | if (sk->sk_type == SOCK_SEQPACKET) { |
646 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
647 | struct l2cap_disconn_req req; | |
648 | ||
649 | sk->sk_state = BT_DISCONN; | |
650 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
651 | ||
aca3192c YH |
652 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
653 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
654 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
655 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
b1235d79 | 656 | } else |
1da177e4 | 657 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
658 | break; |
659 | ||
f66dc81f MH |
660 | case BT_CONNECT2: |
661 | if (sk->sk_type == SOCK_SEQPACKET) { | |
662 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
663 | struct l2cap_conn_rsp rsp; | |
664 | __u16 result; | |
665 | ||
666 | if (bt_sk(sk)->defer_setup) | |
667 | result = L2CAP_CR_SEC_BLOCK; | |
668 | else | |
669 | result = L2CAP_CR_BAD_PSM; | |
670 | ||
671 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
672 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
673 | rsp.result = cpu_to_le16(result); | |
674 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
675 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
676 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
677 | } else | |
678 | l2cap_chan_del(sk, reason); | |
679 | break; | |
680 | ||
1da177e4 LT |
681 | case BT_CONNECT: |
682 | case BT_DISCONN: | |
683 | l2cap_chan_del(sk, reason); | |
684 | break; | |
685 | ||
686 | default: | |
687 | sock_set_flag(sk, SOCK_ZAPPED); | |
688 | break; | |
689 | } | |
690 | } | |
691 | ||
692 | /* Must be called on unlocked socket. */ | |
693 | static void l2cap_sock_close(struct sock *sk) | |
694 | { | |
695 | l2cap_sock_clear_timer(sk); | |
696 | lock_sock(sk); | |
697 | __l2cap_sock_close(sk, ECONNRESET); | |
698 | release_sock(sk); | |
699 | l2cap_sock_kill(sk); | |
700 | } | |
701 | ||
702 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
703 | { | |
704 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
705 | ||
706 | BT_DBG("sk %p", sk); | |
707 | ||
708 | if (parent) { | |
709 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
710 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
711 | ||
1da177e4 LT |
712 | pi->imtu = l2cap_pi(parent)->imtu; |
713 | pi->omtu = l2cap_pi(parent)->omtu; | |
2af6b9d5 MH |
714 | pi->sec_level = l2cap_pi(parent)->sec_level; |
715 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
716 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
717 | } else { |
718 | pi->imtu = L2CAP_DEFAULT_MTU; | |
719 | pi->omtu = 0; | |
2af6b9d5 MH |
720 | pi->sec_level = BT_SECURITY_LOW; |
721 | pi->role_switch = 0; | |
722 | pi->force_reliable = 0; | |
1da177e4 LT |
723 | } |
724 | ||
725 | /* Default config options */ | |
5dee9e7c | 726 | pi->conf_len = 0; |
1da177e4 LT |
727 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
728 | } | |
729 | ||
730 | static struct proto l2cap_proto = { | |
731 | .name = "L2CAP", | |
732 | .owner = THIS_MODULE, | |
733 | .obj_size = sizeof(struct l2cap_pinfo) | |
734 | }; | |
735 | ||
1b8d7ae4 | 736 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
737 | { |
738 | struct sock *sk; | |
739 | ||
6257ff21 | 740 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
741 | if (!sk) |
742 | return NULL; | |
743 | ||
744 | sock_init_data(sock, sk); | |
745 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
746 | ||
747 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 748 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
749 | |
750 | sock_reset_flag(sk, SOCK_ZAPPED); | |
751 | ||
752 | sk->sk_protocol = proto; | |
b1235d79 | 753 | sk->sk_state = BT_OPEN; |
1da177e4 | 754 | |
b1235d79 | 755 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
756 | |
757 | bt_sock_link(&l2cap_sk_list, sk); | |
758 | return sk; | |
759 | } | |
760 | ||
1b8d7ae4 | 761 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
762 | { |
763 | struct sock *sk; | |
764 | ||
765 | BT_DBG("sock %p", sock); | |
766 | ||
767 | sock->state = SS_UNCONNECTED; | |
768 | ||
769 | if (sock->type != SOCK_SEQPACKET && | |
770 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
771 | return -ESOCKTNOSUPPORT; | |
772 | ||
773 | if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW)) | |
774 | return -EPERM; | |
775 | ||
776 | sock->ops = &l2cap_sock_ops; | |
777 | ||
1b8d7ae4 | 778 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
779 | if (!sk) |
780 | return -ENOMEM; | |
781 | ||
782 | l2cap_sock_init(sk, NULL); | |
783 | return 0; | |
784 | } | |
785 | ||
f29972de | 786 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
1da177e4 | 787 | { |
1da177e4 | 788 | struct sock *sk = sock->sk; |
f29972de MH |
789 | struct sockaddr_l2 la; |
790 | int len, err = 0; | |
1da177e4 | 791 | |
f29972de | 792 | BT_DBG("sk %p", sk); |
1da177e4 LT |
793 | |
794 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
795 | return -EINVAL; | |
796 | ||
f29972de MH |
797 | memset(&la, 0, sizeof(la)); |
798 | len = min_t(unsigned int, sizeof(la), alen); | |
799 | memcpy(&la, addr, len); | |
800 | ||
2a517ca6 MH |
801 | if (la.l2_cid) |
802 | return -EINVAL; | |
803 | ||
1da177e4 LT |
804 | lock_sock(sk); |
805 | ||
806 | if (sk->sk_state != BT_OPEN) { | |
807 | err = -EBADFD; | |
808 | goto done; | |
809 | } | |
810 | ||
f29972de | 811 | if (la.l2_psm && btohs(la.l2_psm) < 0x1001 && |
847641d7 MH |
812 | !capable(CAP_NET_BIND_SERVICE)) { |
813 | err = -EACCES; | |
814 | goto done; | |
815 | } | |
8e87d142 | 816 | |
1da177e4 LT |
817 | write_lock_bh(&l2cap_sk_list.lock); |
818 | ||
f29972de | 819 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
1da177e4 LT |
820 | err = -EADDRINUSE; |
821 | } else { | |
822 | /* Save source address */ | |
f29972de MH |
823 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
824 | l2cap_pi(sk)->psm = la.l2_psm; | |
825 | l2cap_pi(sk)->sport = la.l2_psm; | |
1da177e4 | 826 | sk->sk_state = BT_BOUND; |
2af6b9d5 | 827 | |
f29972de | 828 | if (btohs(la.l2_psm) == 0x0001 || btohs(la.l2_psm) == 0x0003) |
2af6b9d5 | 829 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
1da177e4 LT |
830 | } |
831 | ||
832 | write_unlock_bh(&l2cap_sk_list.lock); | |
833 | ||
834 | done: | |
835 | release_sock(sk); | |
836 | return err; | |
837 | } | |
838 | ||
839 | static int l2cap_do_connect(struct sock *sk) | |
840 | { | |
841 | bdaddr_t *src = &bt_sk(sk)->src; | |
842 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
843 | struct l2cap_conn *conn; | |
844 | struct hci_conn *hcon; | |
845 | struct hci_dev *hdev; | |
09ab6f4c | 846 | __u8 auth_type; |
1da177e4 LT |
847 | int err = 0; |
848 | ||
f29972de MH |
849 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
850 | l2cap_pi(sk)->psm); | |
1da177e4 LT |
851 | |
852 | if (!(hdev = hci_get_route(dst, src))) | |
853 | return -EHOSTUNREACH; | |
854 | ||
855 | hci_dev_lock_bh(hdev); | |
856 | ||
857 | err = -ENOMEM; | |
858 | ||
8c1b2355 | 859 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
860 | switch (l2cap_pi(sk)->sec_level) { |
861 | case BT_SECURITY_HIGH: | |
8c1b2355 | 862 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
863 | break; |
864 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 865 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
866 | break; |
867 | default: | |
09ab6f4c | 868 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
869 | break; |
870 | } | |
8c1b2355 | 871 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 872 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 873 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 874 | else |
8c1b2355 | 875 | auth_type = HCI_AT_NO_BONDING; |
435fef20 MH |
876 | |
877 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
878 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
8c1b2355 | 879 | } else { |
2af6b9d5 MH |
880 | switch (l2cap_pi(sk)->sec_level) { |
881 | case BT_SECURITY_HIGH: | |
8c1b2355 | 882 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
883 | break; |
884 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 885 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
886 | break; |
887 | default: | |
8c1b2355 | 888 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
889 | break; |
890 | } | |
09ab6f4c MH |
891 | } |
892 | ||
2af6b9d5 MH |
893 | hcon = hci_connect(hdev, ACL_LINK, dst, |
894 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
895 | if (!hcon) |
896 | goto done; | |
897 | ||
898 | conn = l2cap_conn_add(hcon, 0); | |
899 | if (!conn) { | |
900 | hci_conn_put(hcon); | |
901 | goto done; | |
902 | } | |
903 | ||
904 | err = 0; | |
905 | ||
906 | /* Update source addr of the socket */ | |
907 | bacpy(src, conn->src); | |
908 | ||
909 | l2cap_chan_add(conn, sk, NULL); | |
910 | ||
911 | sk->sk_state = BT_CONNECT; | |
912 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
913 | ||
914 | if (hcon->state == BT_CONNECTED) { | |
79d554a6 | 915 | if (sk->sk_type != SOCK_SEQPACKET) { |
1da177e4 LT |
916 | l2cap_sock_clear_timer(sk); |
917 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
918 | } else |
919 | l2cap_do_start(sk); | |
1da177e4 LT |
920 | } |
921 | ||
922 | done: | |
923 | hci_dev_unlock_bh(hdev); | |
924 | hci_dev_put(hdev); | |
925 | return err; | |
926 | } | |
927 | ||
928 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
929 | { | |
1da177e4 | 930 | struct sock *sk = sock->sk; |
f29972de MH |
931 | struct sockaddr_l2 la; |
932 | int len, err = 0; | |
1da177e4 | 933 | |
1da177e4 LT |
934 | BT_DBG("sk %p", sk); |
935 | ||
2a517ca6 MH |
936 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
937 | return -EINVAL; | |
1da177e4 | 938 | |
f29972de MH |
939 | memset(&la, 0, sizeof(la)); |
940 | len = min_t(unsigned int, sizeof(la), alen); | |
941 | memcpy(&la, addr, len); | |
942 | ||
2a517ca6 MH |
943 | if (la.l2_cid) |
944 | return -EINVAL; | |
945 | ||
946 | lock_sock(sk); | |
947 | ||
f29972de | 948 | if (sk->sk_type == SOCK_SEQPACKET && !la.l2_psm) { |
1da177e4 LT |
949 | err = -EINVAL; |
950 | goto done; | |
951 | } | |
952 | ||
953 | switch(sk->sk_state) { | |
954 | case BT_CONNECT: | |
955 | case BT_CONNECT2: | |
956 | case BT_CONFIG: | |
957 | /* Already connecting */ | |
958 | goto wait; | |
959 | ||
960 | case BT_CONNECTED: | |
961 | /* Already connected */ | |
962 | goto done; | |
963 | ||
964 | case BT_OPEN: | |
965 | case BT_BOUND: | |
966 | /* Can connect */ | |
967 | break; | |
968 | ||
969 | default: | |
970 | err = -EBADFD; | |
971 | goto done; | |
972 | } | |
973 | ||
974 | /* Set destination address and psm */ | |
f29972de MH |
975 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
976 | l2cap_pi(sk)->psm = la.l2_psm; | |
1da177e4 LT |
977 | |
978 | if ((err = l2cap_do_connect(sk))) | |
979 | goto done; | |
980 | ||
981 | wait: | |
982 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
983 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
984 | done: | |
985 | release_sock(sk); | |
986 | return err; | |
987 | } | |
988 | ||
989 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
990 | { | |
991 | struct sock *sk = sock->sk; | |
992 | int err = 0; | |
993 | ||
994 | BT_DBG("sk %p backlog %d", sk, backlog); | |
995 | ||
996 | lock_sock(sk); | |
997 | ||
998 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
999 | err = -EBADFD; | |
1000 | goto done; | |
1001 | } | |
1002 | ||
1003 | if (!l2cap_pi(sk)->psm) { | |
1004 | bdaddr_t *src = &bt_sk(sk)->src; | |
1005 | u16 psm; | |
1006 | ||
1007 | err = -EINVAL; | |
1008 | ||
1009 | write_lock_bh(&l2cap_sk_list.lock); | |
1010 | ||
1011 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
6dc0c208 | 1012 | if (!__l2cap_get_sock_by_addr(htobs(psm), src)) { |
1da177e4 LT |
1013 | l2cap_pi(sk)->psm = htobs(psm); |
1014 | l2cap_pi(sk)->sport = htobs(psm); | |
1015 | err = 0; | |
1016 | break; | |
1017 | } | |
1018 | ||
1019 | write_unlock_bh(&l2cap_sk_list.lock); | |
1020 | ||
1021 | if (err < 0) | |
1022 | goto done; | |
1023 | } | |
1024 | ||
1025 | sk->sk_max_ack_backlog = backlog; | |
1026 | sk->sk_ack_backlog = 0; | |
1027 | sk->sk_state = BT_LISTEN; | |
1028 | ||
1029 | done: | |
1030 | release_sock(sk); | |
1031 | return err; | |
1032 | } | |
1033 | ||
1034 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
1035 | { | |
1036 | DECLARE_WAITQUEUE(wait, current); | |
1037 | struct sock *sk = sock->sk, *nsk; | |
1038 | long timeo; | |
1039 | int err = 0; | |
1040 | ||
fcc70d5f | 1041 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1042 | |
1043 | if (sk->sk_state != BT_LISTEN) { | |
1044 | err = -EBADFD; | |
1045 | goto done; | |
1046 | } | |
1047 | ||
1048 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1049 | ||
1050 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1051 | ||
1052 | /* Wait for an incoming connection. (wake-one). */ | |
1053 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
1054 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
1055 | set_current_state(TASK_INTERRUPTIBLE); | |
1056 | if (!timeo) { | |
1057 | err = -EAGAIN; | |
1058 | break; | |
1059 | } | |
1060 | ||
1061 | release_sock(sk); | |
1062 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1063 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1064 | |
1065 | if (sk->sk_state != BT_LISTEN) { | |
1066 | err = -EBADFD; | |
1067 | break; | |
1068 | } | |
1069 | ||
1070 | if (signal_pending(current)) { | |
1071 | err = sock_intr_errno(timeo); | |
1072 | break; | |
1073 | } | |
1074 | } | |
1075 | set_current_state(TASK_RUNNING); | |
1076 | remove_wait_queue(sk->sk_sleep, &wait); | |
1077 | ||
1078 | if (err) | |
1079 | goto done; | |
1080 | ||
1081 | newsock->state = SS_CONNECTED; | |
1082 | ||
1083 | BT_DBG("new socket %p", nsk); | |
1084 | ||
1085 | done: | |
1086 | release_sock(sk); | |
1087 | return err; | |
1088 | } | |
1089 | ||
1090 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1091 | { | |
1092 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1093 | struct sock *sk = sock->sk; | |
1094 | ||
1095 | BT_DBG("sock %p, sk %p", sock, sk); | |
1096 | ||
1097 | addr->sa_family = AF_BLUETOOTH; | |
1098 | *len = sizeof(struct sockaddr_l2); | |
1099 | ||
f29972de MH |
1100 | if (peer) { |
1101 | la->l2_psm = l2cap_pi(sk)->psm; | |
1da177e4 | 1102 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
f29972de MH |
1103 | la->l2_cid = htobs(l2cap_pi(sk)->dcid); |
1104 | } else { | |
1105 | la->l2_psm = l2cap_pi(sk)->sport; | |
1da177e4 | 1106 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
f29972de MH |
1107 | la->l2_cid = htobs(l2cap_pi(sk)->scid); |
1108 | } | |
1da177e4 | 1109 | |
1da177e4 LT |
1110 | return 0; |
1111 | } | |
1112 | ||
1113 | static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len) | |
1114 | { | |
1115 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1116 | struct sk_buff *skb, **frag; | |
1117 | int err, hlen, count, sent=0; | |
1118 | struct l2cap_hdr *lh; | |
1119 | ||
1120 | BT_DBG("sk %p len %d", sk, len); | |
1121 | ||
1122 | /* First fragment (with L2CAP header) */ | |
1123 | if (sk->sk_type == SOCK_DGRAM) | |
1124 | hlen = L2CAP_HDR_SIZE + 2; | |
1125 | else | |
1126 | hlen = L2CAP_HDR_SIZE; | |
1127 | ||
1128 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1129 | ||
1130 | skb = bt_skb_send_alloc(sk, hlen + count, | |
1131 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1132 | if (!skb) | |
1133 | return err; | |
1134 | ||
1135 | /* Create L2CAP header */ | |
1136 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
1137 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
1138 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1da177e4 LT |
1139 | |
1140 | if (sk->sk_type == SOCK_DGRAM) | |
8e036fc3 | 1141 | put_unaligned(l2cap_pi(sk)->psm, (__le16 *) skb_put(skb, 2)); |
1da177e4 LT |
1142 | |
1143 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
1144 | err = -EFAULT; | |
1145 | goto fail; | |
1146 | } | |
1147 | ||
1148 | sent += count; | |
1149 | len -= count; | |
1150 | ||
1151 | /* Continuation fragments (no L2CAP header) */ | |
1152 | frag = &skb_shinfo(skb)->frag_list; | |
1153 | while (len) { | |
1154 | count = min_t(unsigned int, conn->mtu, len); | |
1155 | ||
1156 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1157 | if (!*frag) | |
1158 | goto fail; | |
8e87d142 | 1159 | |
1da177e4 LT |
1160 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) { |
1161 | err = -EFAULT; | |
1162 | goto fail; | |
1163 | } | |
1164 | ||
1165 | sent += count; | |
1166 | len -= count; | |
1167 | ||
1168 | frag = &(*frag)->next; | |
1169 | } | |
1170 | ||
1171 | if ((err = hci_send_acl(conn->hcon, skb, 0)) < 0) | |
1172 | goto fail; | |
1173 | ||
1174 | return sent; | |
1175 | ||
1176 | fail: | |
1177 | kfree_skb(skb); | |
1178 | return err; | |
1179 | } | |
1180 | ||
1181 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
1182 | { | |
1183 | struct sock *sk = sock->sk; | |
1184 | int err = 0; | |
1185 | ||
1186 | BT_DBG("sock %p, sk %p", sock, sk); | |
1187 | ||
c1cbe4b7 BL |
1188 | err = sock_error(sk); |
1189 | if (err) | |
1190 | return err; | |
1da177e4 LT |
1191 | |
1192 | if (msg->msg_flags & MSG_OOB) | |
1193 | return -EOPNOTSUPP; | |
1194 | ||
1195 | /* Check outgoing MTU */ | |
1196 | if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu) | |
1197 | return -EINVAL; | |
1198 | ||
1199 | lock_sock(sk); | |
1200 | ||
1201 | if (sk->sk_state == BT_CONNECTED) | |
1202 | err = l2cap_do_send(sk, msg, len); | |
1203 | else | |
1204 | err = -ENOTCONN; | |
1205 | ||
1206 | release_sock(sk); | |
1207 | return err; | |
1208 | } | |
1209 | ||
f66dc81f MH |
1210 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1211 | { | |
1212 | struct sock *sk = sock->sk; | |
1213 | ||
1214 | lock_sock(sk); | |
1215 | ||
1216 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1217 | struct l2cap_conn_rsp rsp; | |
1218 | ||
1219 | sk->sk_state = BT_CONFIG; | |
1220 | ||
1221 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1222 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1223 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1224 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1225 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1226 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1227 | ||
1228 | release_sock(sk); | |
1229 | return 0; | |
1230 | } | |
1231 | ||
1232 | release_sock(sk); | |
1233 | ||
1234 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1235 | } | |
1236 | ||
d58daf42 | 1237 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen) |
1da177e4 LT |
1238 | { |
1239 | struct sock *sk = sock->sk; | |
1240 | struct l2cap_options opts; | |
f29972de | 1241 | int len, err = 0; |
1da177e4 LT |
1242 | u32 opt; |
1243 | ||
1244 | BT_DBG("sk %p", sk); | |
1245 | ||
1246 | lock_sock(sk); | |
1247 | ||
1248 | switch (optname) { | |
1249 | case L2CAP_OPTIONS: | |
0878b666 MH |
1250 | opts.imtu = l2cap_pi(sk)->imtu; |
1251 | opts.omtu = l2cap_pi(sk)->omtu; | |
1252 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
6464f35f | 1253 | opts.mode = L2CAP_MODE_BASIC; |
0878b666 | 1254 | |
1da177e4 LT |
1255 | len = min_t(unsigned int, sizeof(opts), optlen); |
1256 | if (copy_from_user((char *) &opts, optval, len)) { | |
1257 | err = -EFAULT; | |
1258 | break; | |
1259 | } | |
0878b666 | 1260 | |
1da177e4 LT |
1261 | l2cap_pi(sk)->imtu = opts.imtu; |
1262 | l2cap_pi(sk)->omtu = opts.omtu; | |
1263 | break; | |
1264 | ||
1265 | case L2CAP_LM: | |
1266 | if (get_user(opt, (u32 __user *) optval)) { | |
1267 | err = -EFAULT; | |
1268 | break; | |
1269 | } | |
1270 | ||
2af6b9d5 MH |
1271 | if (opt & L2CAP_LM_AUTH) |
1272 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
1273 | if (opt & L2CAP_LM_ENCRYPT) | |
1274 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
1275 | if (opt & L2CAP_LM_SECURE) | |
1276 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
1277 | ||
1278 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
1279 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
1280 | break; |
1281 | ||
1282 | default: | |
1283 | err = -ENOPROTOOPT; | |
1284 | break; | |
1285 | } | |
1286 | ||
1287 | release_sock(sk); | |
1288 | return err; | |
1289 | } | |
1290 | ||
d58daf42 MH |
1291 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) |
1292 | { | |
1293 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
1294 | struct bt_security sec; |
1295 | int len, err = 0; | |
f66dc81f | 1296 | u32 opt; |
d58daf42 MH |
1297 | |
1298 | BT_DBG("sk %p", sk); | |
1299 | ||
1300 | if (level == SOL_L2CAP) | |
1301 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
1302 | ||
0588d94f MH |
1303 | if (level != SOL_BLUETOOTH) |
1304 | return -ENOPROTOOPT; | |
1305 | ||
d58daf42 MH |
1306 | lock_sock(sk); |
1307 | ||
1308 | switch (optname) { | |
2af6b9d5 | 1309 | case BT_SECURITY: |
2526d3d8 | 1310 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1311 | err = -EINVAL; |
1312 | break; | |
1313 | } | |
1314 | ||
2af6b9d5 MH |
1315 | sec.level = BT_SECURITY_LOW; |
1316 | ||
1317 | len = min_t(unsigned int, sizeof(sec), optlen); | |
1318 | if (copy_from_user((char *) &sec, optval, len)) { | |
1319 | err = -EFAULT; | |
1320 | break; | |
1321 | } | |
1322 | ||
1323 | if (sec.level < BT_SECURITY_LOW || | |
1324 | sec.level > BT_SECURITY_HIGH) { | |
1325 | err = -EINVAL; | |
1326 | break; | |
1327 | } | |
1328 | ||
1329 | l2cap_pi(sk)->sec_level = sec.level; | |
1330 | break; | |
1331 | ||
f66dc81f MH |
1332 | case BT_DEFER_SETUP: |
1333 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1334 | err = -EINVAL; | |
1335 | break; | |
1336 | } | |
1337 | ||
1338 | if (get_user(opt, (u32 __user *) optval)) { | |
1339 | err = -EFAULT; | |
1340 | break; | |
1341 | } | |
1342 | ||
1343 | bt_sk(sk)->defer_setup = opt; | |
1344 | break; | |
1345 | ||
d58daf42 MH |
1346 | default: |
1347 | err = -ENOPROTOOPT; | |
1348 | break; | |
1349 | } | |
1350 | ||
1351 | release_sock(sk); | |
1352 | return err; | |
1353 | } | |
1354 | ||
1355 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
1356 | { |
1357 | struct sock *sk = sock->sk; | |
1358 | struct l2cap_options opts; | |
1359 | struct l2cap_conninfo cinfo; | |
1360 | int len, err = 0; | |
2af6b9d5 | 1361 | u32 opt; |
1da177e4 LT |
1362 | |
1363 | BT_DBG("sk %p", sk); | |
1364 | ||
1365 | if (get_user(len, optlen)) | |
1366 | return -EFAULT; | |
1367 | ||
1368 | lock_sock(sk); | |
1369 | ||
1370 | switch (optname) { | |
1371 | case L2CAP_OPTIONS: | |
1372 | opts.imtu = l2cap_pi(sk)->imtu; | |
1373 | opts.omtu = l2cap_pi(sk)->omtu; | |
1374 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
6464f35f | 1375 | opts.mode = L2CAP_MODE_BASIC; |
1da177e4 LT |
1376 | |
1377 | len = min_t(unsigned int, len, sizeof(opts)); | |
1378 | if (copy_to_user(optval, (char *) &opts, len)) | |
1379 | err = -EFAULT; | |
1380 | ||
1381 | break; | |
1382 | ||
1383 | case L2CAP_LM: | |
2af6b9d5 MH |
1384 | switch (l2cap_pi(sk)->sec_level) { |
1385 | case BT_SECURITY_LOW: | |
1386 | opt = L2CAP_LM_AUTH; | |
1387 | break; | |
1388 | case BT_SECURITY_MEDIUM: | |
1389 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
1390 | break; | |
1391 | case BT_SECURITY_HIGH: | |
1392 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
1393 | L2CAP_LM_SECURE; | |
1394 | break; | |
1395 | default: | |
1396 | opt = 0; | |
1397 | break; | |
1398 | } | |
1399 | ||
1400 | if (l2cap_pi(sk)->role_switch) | |
1401 | opt |= L2CAP_LM_MASTER; | |
1402 | ||
1403 | if (l2cap_pi(sk)->force_reliable) | |
1404 | opt |= L2CAP_LM_RELIABLE; | |
1405 | ||
1406 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
1407 | err = -EFAULT; |
1408 | break; | |
1409 | ||
1410 | case L2CAP_CONNINFO: | |
f66dc81f MH |
1411 | if (sk->sk_state != BT_CONNECTED && |
1412 | !(sk->sk_state == BT_CONNECT2 && | |
1413 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
1414 | err = -ENOTCONN; |
1415 | break; | |
1416 | } | |
1417 | ||
1418 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
1419 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
1420 | ||
1421 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
1422 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
1423 | err = -EFAULT; | |
1424 | ||
1425 | break; | |
1426 | ||
1427 | default: | |
1428 | err = -ENOPROTOOPT; | |
1429 | break; | |
1430 | } | |
1431 | ||
1432 | release_sock(sk); | |
1433 | return err; | |
1434 | } | |
1435 | ||
d58daf42 MH |
1436 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
1437 | { | |
1438 | struct sock *sk = sock->sk; | |
2af6b9d5 | 1439 | struct bt_security sec; |
d58daf42 MH |
1440 | int len, err = 0; |
1441 | ||
1442 | BT_DBG("sk %p", sk); | |
1443 | ||
1444 | if (level == SOL_L2CAP) | |
1445 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
1446 | ||
0588d94f MH |
1447 | if (level != SOL_BLUETOOTH) |
1448 | return -ENOPROTOOPT; | |
1449 | ||
d58daf42 MH |
1450 | if (get_user(len, optlen)) |
1451 | return -EFAULT; | |
1452 | ||
1453 | lock_sock(sk); | |
1454 | ||
1455 | switch (optname) { | |
2af6b9d5 | 1456 | case BT_SECURITY: |
2526d3d8 | 1457 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1458 | err = -EINVAL; |
1459 | break; | |
1460 | } | |
1461 | ||
2af6b9d5 MH |
1462 | sec.level = l2cap_pi(sk)->sec_level; |
1463 | ||
1464 | len = min_t(unsigned int, len, sizeof(sec)); | |
1465 | if (copy_to_user(optval, (char *) &sec, len)) | |
1466 | err = -EFAULT; | |
1467 | ||
1468 | break; | |
1469 | ||
f66dc81f MH |
1470 | case BT_DEFER_SETUP: |
1471 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1472 | err = -EINVAL; | |
1473 | break; | |
1474 | } | |
1475 | ||
1476 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
1477 | err = -EFAULT; | |
1478 | ||
1479 | break; | |
1480 | ||
d58daf42 MH |
1481 | default: |
1482 | err = -ENOPROTOOPT; | |
1483 | break; | |
1484 | } | |
1485 | ||
1486 | release_sock(sk); | |
1487 | return err; | |
1488 | } | |
1489 | ||
1da177e4 LT |
1490 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1491 | { | |
1492 | struct sock *sk = sock->sk; | |
1493 | int err = 0; | |
1494 | ||
1495 | BT_DBG("sock %p, sk %p", sock, sk); | |
1496 | ||
1497 | if (!sk) | |
1498 | return 0; | |
1499 | ||
1500 | lock_sock(sk); | |
1501 | if (!sk->sk_shutdown) { | |
1502 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1503 | l2cap_sock_clear_timer(sk); | |
1504 | __l2cap_sock_close(sk, 0); | |
1505 | ||
1506 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
1507 | err = bt_sock_wait_state(sk, BT_CLOSED, |
1508 | sk->sk_lingertime); | |
1da177e4 LT |
1509 | } |
1510 | release_sock(sk); | |
1511 | return err; | |
1512 | } | |
1513 | ||
1514 | static int l2cap_sock_release(struct socket *sock) | |
1515 | { | |
1516 | struct sock *sk = sock->sk; | |
1517 | int err; | |
1518 | ||
1519 | BT_DBG("sock %p, sk %p", sock, sk); | |
1520 | ||
1521 | if (!sk) | |
1522 | return 0; | |
1523 | ||
1524 | err = l2cap_sock_shutdown(sock, 2); | |
1525 | ||
1526 | sock_orphan(sk); | |
1527 | l2cap_sock_kill(sk); | |
1528 | return err; | |
1529 | } | |
1530 | ||
1da177e4 LT |
1531 | static void l2cap_chan_ready(struct sock *sk) |
1532 | { | |
1533 | struct sock *parent = bt_sk(sk)->parent; | |
1534 | ||
1535 | BT_DBG("sk %p, parent %p", sk, parent); | |
1536 | ||
1537 | l2cap_pi(sk)->conf_state = 0; | |
1538 | l2cap_sock_clear_timer(sk); | |
1539 | ||
1540 | if (!parent) { | |
1541 | /* Outgoing channel. | |
1542 | * Wake up socket sleeping on connect. | |
1543 | */ | |
1544 | sk->sk_state = BT_CONNECTED; | |
1545 | sk->sk_state_change(sk); | |
1546 | } else { | |
1547 | /* Incoming channel. | |
1548 | * Wake up socket sleeping on accept. | |
1549 | */ | |
1550 | parent->sk_data_ready(parent, 0); | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | /* Copy frame to all raw sockets on that connection */ | |
1555 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
1556 | { | |
1557 | struct l2cap_chan_list *l = &conn->chan_list; | |
1558 | struct sk_buff *nskb; | |
1559 | struct sock * sk; | |
1560 | ||
1561 | BT_DBG("conn %p", conn); | |
1562 | ||
1563 | read_lock(&l->lock); | |
1564 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1565 | if (sk->sk_type != SOCK_RAW) | |
1566 | continue; | |
1567 | ||
1568 | /* Don't send frame to the socket it came from */ | |
1569 | if (skb->sk == sk) | |
1570 | continue; | |
1571 | ||
1572 | if (!(nskb = skb_clone(skb, GFP_ATOMIC))) | |
1573 | continue; | |
1574 | ||
1575 | if (sock_queue_rcv_skb(sk, nskb)) | |
1576 | kfree_skb(nskb); | |
1577 | } | |
1578 | read_unlock(&l->lock); | |
1579 | } | |
1580 | ||
1581 | /* ---- L2CAP signalling commands ---- */ | |
1582 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
1583 | u8 code, u8 ident, u16 dlen, void *data) | |
1584 | { | |
1585 | struct sk_buff *skb, **frag; | |
1586 | struct l2cap_cmd_hdr *cmd; | |
1587 | struct l2cap_hdr *lh; | |
1588 | int len, count; | |
1589 | ||
1590 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", conn, code, ident, dlen); | |
1591 | ||
1592 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
1593 | count = min_t(unsigned int, conn->mtu, len); | |
1594 | ||
1595 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
1596 | if (!skb) | |
1597 | return NULL; | |
1598 | ||
1599 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
1600 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
1601 | lh->cid = cpu_to_le16(0x0001); | |
1da177e4 LT |
1602 | |
1603 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
1604 | cmd->code = code; | |
1605 | cmd->ident = ident; | |
aca3192c | 1606 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
1607 | |
1608 | if (dlen) { | |
1609 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
1610 | memcpy(skb_put(skb, count), data, count); | |
1611 | data += count; | |
1612 | } | |
1613 | ||
1614 | len -= skb->len; | |
1615 | ||
1616 | /* Continuation fragments (no L2CAP header) */ | |
1617 | frag = &skb_shinfo(skb)->frag_list; | |
1618 | while (len) { | |
1619 | count = min_t(unsigned int, conn->mtu, len); | |
1620 | ||
1621 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
1622 | if (!*frag) | |
1623 | goto fail; | |
1624 | ||
1625 | memcpy(skb_put(*frag, count), data, count); | |
1626 | ||
1627 | len -= count; | |
1628 | data += count; | |
1629 | ||
1630 | frag = &(*frag)->next; | |
1631 | } | |
1632 | ||
1633 | return skb; | |
1634 | ||
1635 | fail: | |
1636 | kfree_skb(skb); | |
1637 | return NULL; | |
1638 | } | |
1639 | ||
1640 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
1641 | { | |
1642 | struct l2cap_conf_opt *opt = *ptr; | |
1643 | int len; | |
1644 | ||
1645 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
1646 | *ptr += len; | |
1647 | ||
1648 | *type = opt->type; | |
1649 | *olen = opt->len; | |
1650 | ||
1651 | switch (opt->len) { | |
1652 | case 1: | |
1653 | *val = *((u8 *) opt->val); | |
1654 | break; | |
1655 | ||
1656 | case 2: | |
861d6882 | 1657 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
1658 | break; |
1659 | ||
1660 | case 4: | |
861d6882 | 1661 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
1662 | break; |
1663 | ||
1664 | default: | |
1665 | *val = (unsigned long) opt->val; | |
1666 | break; | |
1667 | } | |
1668 | ||
1669 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
1670 | return len; | |
1671 | } | |
1672 | ||
1da177e4 LT |
1673 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
1674 | { | |
1675 | struct l2cap_conf_opt *opt = *ptr; | |
1676 | ||
1677 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
1678 | ||
1679 | opt->type = type; | |
1680 | opt->len = len; | |
1681 | ||
1682 | switch (len) { | |
1683 | case 1: | |
1684 | *((u8 *) opt->val) = val; | |
1685 | break; | |
1686 | ||
1687 | case 2: | |
8e036fc3 | 1688 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
1689 | break; |
1690 | ||
1691 | case 4: | |
8e036fc3 | 1692 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
1693 | break; |
1694 | ||
1695 | default: | |
1696 | memcpy(opt->val, (void *) val, len); | |
1697 | break; | |
1698 | } | |
1699 | ||
1700 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
1701 | } | |
1702 | ||
1703 | static int l2cap_build_conf_req(struct sock *sk, void *data) | |
1704 | { | |
1705 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1706 | struct l2cap_conf_req *req = data; | |
1707 | void *ptr = req->data; | |
1708 | ||
1709 | BT_DBG("sk %p", sk); | |
1710 | ||
1711 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
1712 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
1713 | ||
1714 | /* FIXME: Need actual value of the flush timeout */ | |
1715 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
1716 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
1717 | ||
aca3192c YH |
1718 | req->dcid = cpu_to_le16(pi->dcid); |
1719 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
1720 | |
1721 | return ptr - data; | |
1722 | } | |
1723 | ||
5dee9e7c | 1724 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
1725 | { |
1726 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
1727 | struct l2cap_conf_rsp *rsp = data; |
1728 | void *ptr = rsp->data; | |
1729 | void *req = pi->conf_req; | |
1730 | int len = pi->conf_len; | |
1731 | int type, hint, olen; | |
1732 | unsigned long val; | |
6464f35f | 1733 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 1734 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 1735 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 1736 | |
5dee9e7c | 1737 | BT_DBG("sk %p", sk); |
820ae1b8 | 1738 | |
5dee9e7c MH |
1739 | while (len >= L2CAP_CONF_OPT_SIZE) { |
1740 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 1741 | |
5dee9e7c MH |
1742 | hint = type & 0x80; |
1743 | type &= 0x7f; | |
1744 | ||
1745 | switch (type) { | |
1746 | case L2CAP_CONF_MTU: | |
861d6882 | 1747 | mtu = val; |
5dee9e7c MH |
1748 | break; |
1749 | ||
1750 | case L2CAP_CONF_FLUSH_TO: | |
1751 | pi->flush_to = val; | |
1752 | break; | |
1753 | ||
1754 | case L2CAP_CONF_QOS: | |
1755 | break; | |
1756 | ||
6464f35f MH |
1757 | case L2CAP_CONF_RFC: |
1758 | if (olen == sizeof(rfc)) | |
1759 | memcpy(&rfc, (void *) val, olen); | |
1760 | break; | |
1761 | ||
5dee9e7c MH |
1762 | default: |
1763 | if (hint) | |
1764 | break; | |
1765 | ||
1766 | result = L2CAP_CONF_UNKNOWN; | |
1767 | *((u8 *) ptr++) = type; | |
1768 | break; | |
1769 | } | |
1770 | } | |
1771 | ||
1772 | if (result == L2CAP_CONF_SUCCESS) { | |
1773 | /* Configure output options and let the other side know | |
1774 | * which ones we don't like. */ | |
1775 | ||
6464f35f MH |
1776 | if (rfc.mode == L2CAP_MODE_BASIC) { |
1777 | if (mtu < pi->omtu) | |
1778 | result = L2CAP_CONF_UNACCEPT; | |
1779 | else { | |
1780 | pi->omtu = mtu; | |
1781 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
1782 | } | |
1783 | ||
1784 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
1785 | } else { | |
5dee9e7c | 1786 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 1787 | |
6464f35f MH |
1788 | memset(&rfc, 0, sizeof(rfc)); |
1789 | rfc.mode = L2CAP_MODE_BASIC; | |
1790 | ||
1791 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
1792 | sizeof(rfc), (unsigned long) &rfc); | |
1793 | } | |
5dee9e7c MH |
1794 | } |
1795 | ||
1796 | rsp->scid = cpu_to_le16(pi->dcid); | |
1797 | rsp->result = cpu_to_le16(result); | |
1798 | rsp->flags = cpu_to_le16(0x0000); | |
1799 | ||
1800 | return ptr - data; | |
1da177e4 LT |
1801 | } |
1802 | ||
5dee9e7c | 1803 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
1804 | { |
1805 | struct l2cap_conf_rsp *rsp = data; | |
1806 | void *ptr = rsp->data; | |
1da177e4 | 1807 | |
5dee9e7c | 1808 | BT_DBG("sk %p", sk); |
1da177e4 | 1809 | |
aca3192c | 1810 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 1811 | rsp->result = cpu_to_le16(result); |
aca3192c | 1812 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
1813 | |
1814 | return ptr - data; | |
1815 | } | |
1816 | ||
4e8402a3 MH |
1817 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1818 | { | |
1819 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
1820 | ||
1821 | if (rej->reason != 0x0000) | |
1822 | return 0; | |
1823 | ||
1824 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
1825 | cmd->ident == conn->info_ident) { | |
4e8402a3 | 1826 | del_timer(&conn->info_timer); |
984947dc MH |
1827 | |
1828 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
e1027a7c | 1829 | conn->info_ident = 0; |
984947dc | 1830 | |
4e8402a3 MH |
1831 | l2cap_conn_start(conn); |
1832 | } | |
1833 | ||
1834 | return 0; | |
1835 | } | |
1836 | ||
1da177e4 LT |
1837 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1838 | { | |
1839 | struct l2cap_chan_list *list = &conn->chan_list; | |
1840 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
1841 | struct l2cap_conn_rsp rsp; | |
1842 | struct sock *sk, *parent; | |
e7c29cb1 | 1843 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
1844 | |
1845 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 1846 | __le16 psm = req->psm; |
1da177e4 LT |
1847 | |
1848 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
1849 | ||
1850 | /* Check if we have socket listening on psm */ | |
1851 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
1852 | if (!parent) { | |
1853 | result = L2CAP_CR_BAD_PSM; | |
1854 | goto sendresp; | |
1855 | } | |
1856 | ||
e7c29cb1 MH |
1857 | /* Check if the ACL is secure enough (if not SDP) */ |
1858 | if (psm != cpu_to_le16(0x0001) && | |
1859 | !hci_conn_check_link_mode(conn->hcon)) { | |
2950f21a | 1860 | conn->disc_reason = 0x05; |
e7c29cb1 MH |
1861 | result = L2CAP_CR_SEC_BLOCK; |
1862 | goto response; | |
1863 | } | |
1864 | ||
1da177e4 LT |
1865 | result = L2CAP_CR_NO_MEM; |
1866 | ||
1867 | /* Check for backlog size */ | |
1868 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 1869 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
1870 | goto response; |
1871 | } | |
1872 | ||
3b1e0a65 | 1873 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
1874 | if (!sk) |
1875 | goto response; | |
1876 | ||
fd1278d7 | 1877 | write_lock_bh(&list->lock); |
1da177e4 LT |
1878 | |
1879 | /* Check if we already have channel with that dcid */ | |
1880 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 1881 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1882 | sock_set_flag(sk, SOCK_ZAPPED); |
1883 | l2cap_sock_kill(sk); | |
1884 | goto response; | |
1885 | } | |
1886 | ||
1887 | hci_conn_hold(conn->hcon); | |
1888 | ||
1889 | l2cap_sock_init(sk, parent); | |
1890 | bacpy(&bt_sk(sk)->src, conn->src); | |
1891 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
1892 | l2cap_pi(sk)->psm = psm; | |
1893 | l2cap_pi(sk)->dcid = scid; | |
1894 | ||
1895 | __l2cap_chan_add(conn, sk, parent); | |
1896 | dcid = l2cap_pi(sk)->scid; | |
1897 | ||
1898 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1899 | ||
1da177e4 LT |
1900 | l2cap_pi(sk)->ident = cmd->ident; |
1901 | ||
984947dc | 1902 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
2af6b9d5 | 1903 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
1904 | if (bt_sk(sk)->defer_setup) { |
1905 | sk->sk_state = BT_CONNECT2; | |
1906 | result = L2CAP_CR_PEND; | |
1907 | status = L2CAP_CS_AUTHOR_PEND; | |
1908 | parent->sk_data_ready(parent, 0); | |
1909 | } else { | |
1910 | sk->sk_state = BT_CONFIG; | |
1911 | result = L2CAP_CR_SUCCESS; | |
1912 | status = L2CAP_CS_NO_INFO; | |
1913 | } | |
79d554a6 MH |
1914 | } else { |
1915 | sk->sk_state = BT_CONNECT2; | |
1916 | result = L2CAP_CR_PEND; | |
1917 | status = L2CAP_CS_AUTHEN_PEND; | |
1918 | } | |
1919 | } else { | |
1920 | sk->sk_state = BT_CONNECT2; | |
1921 | result = L2CAP_CR_PEND; | |
1922 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
1923 | } |
1924 | ||
fd1278d7 | 1925 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1926 | |
1927 | response: | |
1928 | bh_unlock_sock(parent); | |
1929 | ||
1930 | sendresp: | |
aca3192c YH |
1931 | rsp.scid = cpu_to_le16(scid); |
1932 | rsp.dcid = cpu_to_le16(dcid); | |
1933 | rsp.result = cpu_to_le16(result); | |
1934 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 1935 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
1936 | |
1937 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
1938 | struct l2cap_info_req info; | |
1939 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
1940 | ||
1941 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
1942 | conn->info_ident = l2cap_get_ident(conn); | |
1943 | ||
1944 | mod_timer(&conn->info_timer, jiffies + | |
1945 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
1946 | ||
1947 | l2cap_send_cmd(conn, conn->info_ident, | |
1948 | L2CAP_INFO_REQ, sizeof(info), &info); | |
1949 | } | |
1950 | ||
1da177e4 LT |
1951 | return 0; |
1952 | } | |
1953 | ||
1954 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1955 | { | |
1956 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
1957 | u16 scid, dcid, result, status; | |
1958 | struct sock *sk; | |
1959 | u8 req[128]; | |
1960 | ||
1961 | scid = __le16_to_cpu(rsp->scid); | |
1962 | dcid = __le16_to_cpu(rsp->dcid); | |
1963 | result = __le16_to_cpu(rsp->result); | |
1964 | status = __le16_to_cpu(rsp->status); | |
1965 | ||
1966 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
1967 | ||
1968 | if (scid) { | |
1969 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
1970 | return 0; | |
1971 | } else { | |
1972 | if (!(sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident))) | |
1973 | return 0; | |
1974 | } | |
1975 | ||
1976 | switch (result) { | |
1977 | case L2CAP_CR_SUCCESS: | |
1978 | sk->sk_state = BT_CONFIG; | |
1979 | l2cap_pi(sk)->ident = 0; | |
1980 | l2cap_pi(sk)->dcid = dcid; | |
1981 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
1982 | ||
6a8d3010 MH |
1983 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
1984 | ||
1da177e4 LT |
1985 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
1986 | l2cap_build_conf_req(sk, req), req); | |
1987 | break; | |
1988 | ||
1989 | case L2CAP_CR_PEND: | |
6a8d3010 | 1990 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 LT |
1991 | break; |
1992 | ||
1993 | default: | |
1994 | l2cap_chan_del(sk, ECONNREFUSED); | |
1995 | break; | |
1996 | } | |
1997 | ||
1998 | bh_unlock_sock(sk); | |
1999 | return 0; | |
2000 | } | |
2001 | ||
88219a0f | 2002 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
2003 | { |
2004 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
2005 | u16 dcid, flags; | |
2006 | u8 rsp[64]; | |
2007 | struct sock *sk; | |
5dee9e7c | 2008 | int len; |
1da177e4 LT |
2009 | |
2010 | dcid = __le16_to_cpu(req->dcid); | |
2011 | flags = __le16_to_cpu(req->flags); | |
2012 | ||
2013 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
2014 | ||
2015 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
2016 | return -ENOENT; | |
2017 | ||
354f60a9 MH |
2018 | if (sk->sk_state == BT_DISCONN) |
2019 | goto unlock; | |
2020 | ||
5dee9e7c | 2021 | /* Reject if config buffer is too small. */ |
88219a0f | 2022 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
2023 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
2024 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
2025 | l2cap_build_conf_rsp(sk, rsp, | |
2026 | L2CAP_CONF_REJECT, flags), rsp); | |
2027 | goto unlock; | |
2028 | } | |
2029 | ||
2030 | /* Store config. */ | |
2031 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
2032 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
2033 | |
2034 | if (flags & 0x0001) { | |
2035 | /* Incomplete config. Send empty response. */ | |
2036 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
2037 | l2cap_build_conf_rsp(sk, rsp, |
2038 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
2039 | goto unlock; |
2040 | } | |
2041 | ||
2042 | /* Complete config. */ | |
5dee9e7c MH |
2043 | len = l2cap_parse_conf_req(sk, rsp); |
2044 | if (len < 0) | |
1da177e4 LT |
2045 | goto unlock; |
2046 | ||
5dee9e7c MH |
2047 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
2048 | ||
5dee9e7c MH |
2049 | /* Reset config buffer. */ |
2050 | l2cap_pi(sk)->conf_len = 0; | |
2051 | ||
876d9484 MH |
2052 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
2053 | goto unlock; | |
2054 | ||
1da177e4 LT |
2055 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
2056 | sk->sk_state = BT_CONNECTED; | |
2057 | l2cap_chan_ready(sk); | |
876d9484 MH |
2058 | goto unlock; |
2059 | } | |
2060 | ||
2061 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 2062 | u8 buf[64]; |
1da177e4 | 2063 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 2064 | l2cap_build_conf_req(sk, buf), buf); |
1da177e4 LT |
2065 | } |
2066 | ||
2067 | unlock: | |
2068 | bh_unlock_sock(sk); | |
2069 | return 0; | |
2070 | } | |
2071 | ||
2072 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2073 | { | |
2074 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
2075 | u16 scid, flags, result; | |
2076 | struct sock *sk; | |
2077 | ||
2078 | scid = __le16_to_cpu(rsp->scid); | |
2079 | flags = __le16_to_cpu(rsp->flags); | |
2080 | result = __le16_to_cpu(rsp->result); | |
2081 | ||
2082 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", scid, flags, result); | |
2083 | ||
2084 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
2085 | return 0; | |
2086 | ||
2087 | switch (result) { | |
2088 | case L2CAP_CONF_SUCCESS: | |
2089 | break; | |
2090 | ||
2091 | case L2CAP_CONF_UNACCEPT: | |
2092 | if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) { | |
2093 | char req[128]; | |
2094 | /* It does not make sense to adjust L2CAP parameters | |
2095 | * that are currently defined in the spec. We simply | |
2096 | * resend config request that we sent earlier. It is | |
2097 | * stupid, but it helps qualification testing which | |
2098 | * expects at least some response from us. */ | |
2099 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
2100 | l2cap_build_conf_req(sk, req), req); | |
2101 | goto done; | |
2102 | } | |
2103 | ||
8e87d142 | 2104 | default: |
1da177e4 | 2105 | sk->sk_state = BT_DISCONN; |
b1235d79 | 2106 | sk->sk_err = ECONNRESET; |
1da177e4 LT |
2107 | l2cap_sock_set_timer(sk, HZ * 5); |
2108 | { | |
2109 | struct l2cap_disconn_req req; | |
aca3192c YH |
2110 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
2111 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
2112 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
2113 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
2114 | } | |
2115 | goto done; | |
2116 | } | |
2117 | ||
2118 | if (flags & 0x01) | |
2119 | goto done; | |
2120 | ||
1da177e4 LT |
2121 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
2122 | ||
2123 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
2124 | sk->sk_state = BT_CONNECTED; | |
2125 | l2cap_chan_ready(sk); | |
2126 | } | |
2127 | ||
2128 | done: | |
2129 | bh_unlock_sock(sk); | |
2130 | return 0; | |
2131 | } | |
2132 | ||
2133 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2134 | { | |
2135 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
2136 | struct l2cap_disconn_rsp rsp; | |
2137 | u16 dcid, scid; | |
2138 | struct sock *sk; | |
2139 | ||
2140 | scid = __le16_to_cpu(req->scid); | |
2141 | dcid = __le16_to_cpu(req->dcid); | |
2142 | ||
2143 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
2144 | ||
2145 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) | |
2146 | return 0; | |
2147 | ||
aca3192c YH |
2148 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
2149 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
2150 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
2151 | ||
2152 | sk->sk_shutdown = SHUTDOWN_MASK; | |
2153 | ||
2154 | l2cap_chan_del(sk, ECONNRESET); | |
2155 | bh_unlock_sock(sk); | |
2156 | ||
2157 | l2cap_sock_kill(sk); | |
2158 | return 0; | |
2159 | } | |
2160 | ||
2161 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2162 | { | |
2163 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
2164 | u16 dcid, scid; | |
2165 | struct sock *sk; | |
2166 | ||
2167 | scid = __le16_to_cpu(rsp->scid); | |
2168 | dcid = __le16_to_cpu(rsp->dcid); | |
2169 | ||
2170 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
2171 | ||
2172 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) | |
2173 | return 0; | |
2174 | ||
2175 | l2cap_chan_del(sk, 0); | |
2176 | bh_unlock_sock(sk); | |
2177 | ||
2178 | l2cap_sock_kill(sk); | |
2179 | return 0; | |
2180 | } | |
2181 | ||
2182 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2183 | { | |
2184 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
2185 | u16 type; |
2186 | ||
2187 | type = __le16_to_cpu(req->type); | |
2188 | ||
2189 | BT_DBG("type 0x%4.4x", type); | |
2190 | ||
f0709e03 MH |
2191 | if (type == L2CAP_IT_FEAT_MASK) { |
2192 | u8 buf[8]; | |
2193 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
2194 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2195 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
2196 | put_unaligned(cpu_to_le32(l2cap_feat_mask), (__le32 *) rsp->data); | |
2197 | l2cap_send_cmd(conn, cmd->ident, | |
2198 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
e1027a7c MH |
2199 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
2200 | u8 buf[12]; | |
2201 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
2202 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
2203 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
2204 | memcpy(buf + 4, l2cap_fixed_chan, 8); | |
2205 | l2cap_send_cmd(conn, cmd->ident, | |
2206 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
f0709e03 MH |
2207 | } else { |
2208 | struct l2cap_info_rsp rsp; | |
2209 | rsp.type = cpu_to_le16(type); | |
2210 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
2211 | l2cap_send_cmd(conn, cmd->ident, | |
2212 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
2213 | } | |
1da177e4 LT |
2214 | |
2215 | return 0; | |
2216 | } | |
2217 | ||
2218 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2219 | { | |
2220 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
2221 | u16 type, result; | |
2222 | ||
2223 | type = __le16_to_cpu(rsp->type); | |
2224 | result = __le16_to_cpu(rsp->result); | |
2225 | ||
2226 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
2227 | ||
4e8402a3 MH |
2228 | del_timer(&conn->info_timer); |
2229 | ||
984947dc | 2230 | if (type == L2CAP_IT_FEAT_MASK) { |
83985319 | 2231 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 | 2232 | |
e1027a7c MH |
2233 | if (conn->feat_mask & 0x0080) { |
2234 | struct l2cap_info_req req; | |
2235 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
2236 | ||
2237 | conn->info_ident = l2cap_get_ident(conn); | |
2238 | ||
2239 | l2cap_send_cmd(conn, conn->info_ident, | |
2240 | L2CAP_INFO_REQ, sizeof(req), &req); | |
2241 | } else { | |
2242 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
2243 | conn->info_ident = 0; | |
2244 | ||
2245 | l2cap_conn_start(conn); | |
2246 | } | |
2247 | } else if (type == L2CAP_IT_FIXED_CHAN) { | |
984947dc | 2248 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 2249 | conn->info_ident = 0; |
984947dc MH |
2250 | |
2251 | l2cap_conn_start(conn); | |
2252 | } | |
4e8402a3 | 2253 | |
1da177e4 LT |
2254 | return 0; |
2255 | } | |
2256 | ||
2257 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
2258 | { | |
2259 | u8 *data = skb->data; | |
2260 | int len = skb->len; | |
2261 | struct l2cap_cmd_hdr cmd; | |
2262 | int err = 0; | |
2263 | ||
2264 | l2cap_raw_recv(conn, skb); | |
2265 | ||
2266 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 2267 | u16 cmd_len; |
1da177e4 LT |
2268 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
2269 | data += L2CAP_CMD_HDR_SIZE; | |
2270 | len -= L2CAP_CMD_HDR_SIZE; | |
2271 | ||
88219a0f | 2272 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 2273 | |
88219a0f | 2274 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 2275 | |
88219a0f | 2276 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
2277 | BT_DBG("corrupted command"); |
2278 | break; | |
2279 | } | |
2280 | ||
2281 | switch (cmd.code) { | |
2282 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 2283 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
2284 | break; |
2285 | ||
2286 | case L2CAP_CONN_REQ: | |
2287 | err = l2cap_connect_req(conn, &cmd, data); | |
2288 | break; | |
2289 | ||
2290 | case L2CAP_CONN_RSP: | |
2291 | err = l2cap_connect_rsp(conn, &cmd, data); | |
2292 | break; | |
2293 | ||
2294 | case L2CAP_CONF_REQ: | |
88219a0f | 2295 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
2296 | break; |
2297 | ||
2298 | case L2CAP_CONF_RSP: | |
2299 | err = l2cap_config_rsp(conn, &cmd, data); | |
2300 | break; | |
2301 | ||
2302 | case L2CAP_DISCONN_REQ: | |
2303 | err = l2cap_disconnect_req(conn, &cmd, data); | |
2304 | break; | |
2305 | ||
2306 | case L2CAP_DISCONN_RSP: | |
2307 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
2308 | break; | |
2309 | ||
2310 | case L2CAP_ECHO_REQ: | |
88219a0f | 2311 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
2312 | break; |
2313 | ||
2314 | case L2CAP_ECHO_RSP: | |
2315 | break; | |
2316 | ||
2317 | case L2CAP_INFO_REQ: | |
2318 | err = l2cap_information_req(conn, &cmd, data); | |
2319 | break; | |
2320 | ||
2321 | case L2CAP_INFO_RSP: | |
2322 | err = l2cap_information_rsp(conn, &cmd, data); | |
2323 | break; | |
2324 | ||
2325 | default: | |
2326 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
2327 | err = -EINVAL; | |
2328 | break; | |
2329 | } | |
2330 | ||
2331 | if (err) { | |
2332 | struct l2cap_cmd_rej rej; | |
2333 | BT_DBG("error %d", err); | |
2334 | ||
2335 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 2336 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
2337 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
2338 | } | |
2339 | ||
88219a0f AV |
2340 | data += cmd_len; |
2341 | len -= cmd_len; | |
1da177e4 LT |
2342 | } |
2343 | ||
2344 | kfree_skb(skb); | |
2345 | } | |
2346 | ||
2347 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) | |
2348 | { | |
2349 | struct sock *sk; | |
2350 | ||
2351 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
2352 | if (!sk) { | |
2353 | BT_DBG("unknown cid 0x%4.4x", cid); | |
2354 | goto drop; | |
2355 | } | |
2356 | ||
2357 | BT_DBG("sk %p, len %d", sk, skb->len); | |
2358 | ||
2359 | if (sk->sk_state != BT_CONNECTED) | |
2360 | goto drop; | |
2361 | ||
2362 | if (l2cap_pi(sk)->imtu < skb->len) | |
2363 | goto drop; | |
2364 | ||
2365 | /* If socket recv buffers overflows we drop data here | |
2366 | * which is *bad* because L2CAP has to be reliable. | |
2367 | * But we don't have any other choice. L2CAP doesn't | |
2368 | * provide flow control mechanism. */ | |
2369 | ||
2370 | if (!sock_queue_rcv_skb(sk, skb)) | |
2371 | goto done; | |
2372 | ||
2373 | drop: | |
2374 | kfree_skb(skb); | |
2375 | ||
2376 | done: | |
0139418c MH |
2377 | if (sk) |
2378 | bh_unlock_sock(sk); | |
2379 | ||
1da177e4 LT |
2380 | return 0; |
2381 | } | |
2382 | ||
8e036fc3 | 2383 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
2384 | { |
2385 | struct sock *sk; | |
2386 | ||
2387 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
2388 | if (!sk) | |
2389 | goto drop; | |
2390 | ||
2391 | BT_DBG("sk %p, len %d", sk, skb->len); | |
2392 | ||
2393 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
2394 | goto drop; | |
2395 | ||
2396 | if (l2cap_pi(sk)->imtu < skb->len) | |
2397 | goto drop; | |
2398 | ||
2399 | if (!sock_queue_rcv_skb(sk, skb)) | |
2400 | goto done; | |
2401 | ||
2402 | drop: | |
2403 | kfree_skb(skb); | |
2404 | ||
2405 | done: | |
2406 | if (sk) bh_unlock_sock(sk); | |
2407 | return 0; | |
2408 | } | |
2409 | ||
2410 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
2411 | { | |
2412 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
2413 | u16 cid, len; |
2414 | __le16 psm; | |
1da177e4 LT |
2415 | |
2416 | skb_pull(skb, L2CAP_HDR_SIZE); | |
2417 | cid = __le16_to_cpu(lh->cid); | |
2418 | len = __le16_to_cpu(lh->len); | |
2419 | ||
2420 | BT_DBG("len %d, cid 0x%4.4x", len, cid); | |
2421 | ||
2422 | switch (cid) { | |
2423 | case 0x0001: | |
2424 | l2cap_sig_channel(conn, skb); | |
2425 | break; | |
2426 | ||
2427 | case 0x0002: | |
8e036fc3 | 2428 | psm = get_unaligned((__le16 *) skb->data); |
1da177e4 LT |
2429 | skb_pull(skb, 2); |
2430 | l2cap_conless_channel(conn, psm, skb); | |
2431 | break; | |
2432 | ||
2433 | default: | |
2434 | l2cap_data_channel(conn, cid, skb); | |
2435 | break; | |
2436 | } | |
2437 | } | |
2438 | ||
2439 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
2440 | ||
2441 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
2442 | { | |
2443 | int exact = 0, lm1 = 0, lm2 = 0; | |
2444 | register struct sock *sk; | |
2445 | struct hlist_node *node; | |
2446 | ||
2447 | if (type != ACL_LINK) | |
2448 | return 0; | |
2449 | ||
2450 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
2451 | ||
2452 | /* Find listening sockets and check their link_mode */ | |
2453 | read_lock(&l2cap_sk_list.lock); | |
2454 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
2455 | if (sk->sk_state != BT_LISTEN) | |
2456 | continue; | |
2457 | ||
2458 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
2459 | lm1 |= HCI_LM_ACCEPT; |
2460 | if (l2cap_pi(sk)->role_switch) | |
2461 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 2462 | exact++; |
2af6b9d5 MH |
2463 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
2464 | lm2 |= HCI_LM_ACCEPT; | |
2465 | if (l2cap_pi(sk)->role_switch) | |
2466 | lm2 |= HCI_LM_MASTER; | |
2467 | } | |
1da177e4 LT |
2468 | } |
2469 | read_unlock(&l2cap_sk_list.lock); | |
2470 | ||
2471 | return exact ? lm1 : lm2; | |
2472 | } | |
2473 | ||
2474 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
2475 | { | |
0139418c MH |
2476 | struct l2cap_conn *conn; |
2477 | ||
1da177e4 LT |
2478 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
2479 | ||
2480 | if (hcon->type != ACL_LINK) | |
2481 | return 0; | |
2482 | ||
2483 | if (!status) { | |
1da177e4 LT |
2484 | conn = l2cap_conn_add(hcon, status); |
2485 | if (conn) | |
2486 | l2cap_conn_ready(conn); | |
0139418c | 2487 | } else |
1da177e4 LT |
2488 | l2cap_conn_del(hcon, bt_err(status)); |
2489 | ||
2490 | return 0; | |
2491 | } | |
2492 | ||
2950f21a MH |
2493 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
2494 | { | |
2495 | struct l2cap_conn *conn = hcon->l2cap_data; | |
2496 | ||
2497 | BT_DBG("hcon %p", hcon); | |
2498 | ||
2499 | if (hcon->type != ACL_LINK || !conn) | |
2500 | return 0x13; | |
2501 | ||
2502 | return conn->disc_reason; | |
2503 | } | |
2504 | ||
2505 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) | |
1da177e4 LT |
2506 | { |
2507 | BT_DBG("hcon %p reason %d", hcon, reason); | |
2508 | ||
2509 | if (hcon->type != ACL_LINK) | |
2510 | return 0; | |
2511 | ||
2512 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 2513 | |
1da177e4 LT |
2514 | return 0; |
2515 | } | |
2516 | ||
f62e4323 MH |
2517 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
2518 | { | |
255c7601 MH |
2519 | if (sk->sk_type != SOCK_SEQPACKET) |
2520 | return; | |
2521 | ||
f62e4323 MH |
2522 | if (encrypt == 0x00) { |
2523 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { | |
2524 | l2cap_sock_clear_timer(sk); | |
2525 | l2cap_sock_set_timer(sk, HZ * 5); | |
2526 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
2527 | __l2cap_sock_close(sk, ECONNREFUSED); | |
2528 | } else { | |
2529 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) | |
2530 | l2cap_sock_clear_timer(sk); | |
2531 | } | |
2532 | } | |
2533 | ||
8c1b2355 | 2534 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
2535 | { |
2536 | struct l2cap_chan_list *l; | |
0139418c | 2537 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 2538 | struct sock *sk; |
1da177e4 | 2539 | |
0139418c | 2540 | if (!conn) |
1da177e4 | 2541 | return 0; |
0139418c | 2542 | |
1da177e4 LT |
2543 | l = &conn->chan_list; |
2544 | ||
2545 | BT_DBG("conn %p", conn); | |
2546 | ||
2547 | read_lock(&l->lock); | |
2548 | ||
2549 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2550 | bh_lock_sock(sk); | |
2551 | ||
6a8d3010 MH |
2552 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
2553 | bh_unlock_sock(sk); | |
2554 | continue; | |
2555 | } | |
2556 | ||
f62e4323 | 2557 | if (!status && (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 2558 | sk->sk_state == BT_CONFIG)) { |
f62e4323 | 2559 | l2cap_check_encryption(sk, encrypt); |
9719f8af MH |
2560 | bh_unlock_sock(sk); |
2561 | continue; | |
2562 | } | |
2563 | ||
b1235d79 MH |
2564 | if (sk->sk_state == BT_CONNECT) { |
2565 | if (!status) { | |
2566 | struct l2cap_conn_req req; | |
2567 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2568 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 2569 | |
b1235d79 | 2570 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
1da177e4 | 2571 | |
b1235d79 MH |
2572 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2573 | L2CAP_CONN_REQ, sizeof(req), &req); | |
2574 | } else { | |
2575 | l2cap_sock_clear_timer(sk); | |
2576 | l2cap_sock_set_timer(sk, HZ / 10); | |
2577 | } | |
2578 | } else if (sk->sk_state == BT_CONNECT2) { | |
2579 | struct l2cap_conn_rsp rsp; | |
2580 | __u16 result; | |
1da177e4 | 2581 | |
b1235d79 MH |
2582 | if (!status) { |
2583 | sk->sk_state = BT_CONFIG; | |
2584 | result = L2CAP_CR_SUCCESS; | |
2585 | } else { | |
2586 | sk->sk_state = BT_DISCONN; | |
2587 | l2cap_sock_set_timer(sk, HZ / 10); | |
2588 | result = L2CAP_CR_SEC_BLOCK; | |
2589 | } | |
2590 | ||
2591 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
2592 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2593 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 2594 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
2595 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2596 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
2597 | } | |
1da177e4 LT |
2598 | |
2599 | bh_unlock_sock(sk); | |
2600 | } | |
2601 | ||
2602 | read_unlock(&l->lock); | |
b1235d79 | 2603 | |
1da177e4 LT |
2604 | return 0; |
2605 | } | |
2606 | ||
2607 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
2608 | { | |
2609 | struct l2cap_conn *conn = hcon->l2cap_data; | |
2610 | ||
2611 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
2612 | goto drop; | |
2613 | ||
2614 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
2615 | ||
2616 | if (flags & ACL_START) { | |
2617 | struct l2cap_hdr *hdr; | |
2618 | int len; | |
2619 | ||
2620 | if (conn->rx_len) { | |
2621 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
2622 | kfree_skb(conn->rx_skb); | |
2623 | conn->rx_skb = NULL; | |
2624 | conn->rx_len = 0; | |
2625 | l2cap_conn_unreliable(conn, ECOMM); | |
2626 | } | |
2627 | ||
2628 | if (skb->len < 2) { | |
2629 | BT_ERR("Frame is too short (len %d)", skb->len); | |
2630 | l2cap_conn_unreliable(conn, ECOMM); | |
2631 | goto drop; | |
2632 | } | |
2633 | ||
2634 | hdr = (struct l2cap_hdr *) skb->data; | |
2635 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
2636 | ||
2637 | if (len == skb->len) { | |
2638 | /* Complete frame received */ | |
2639 | l2cap_recv_frame(conn, skb); | |
2640 | return 0; | |
2641 | } | |
2642 | ||
2643 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
2644 | ||
2645 | if (skb->len > len) { | |
2646 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
2647 | skb->len, len); | |
2648 | l2cap_conn_unreliable(conn, ECOMM); | |
2649 | goto drop; | |
2650 | } | |
2651 | ||
2652 | /* Allocate skb for the complete frame (with header) */ | |
2653 | if (!(conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC))) | |
2654 | goto drop; | |
2655 | ||
d626f62b | 2656 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 2657 | skb->len); |
1da177e4 LT |
2658 | conn->rx_len = len - skb->len; |
2659 | } else { | |
2660 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
2661 | ||
2662 | if (!conn->rx_len) { | |
2663 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
2664 | l2cap_conn_unreliable(conn, ECOMM); | |
2665 | goto drop; | |
2666 | } | |
2667 | ||
2668 | if (skb->len > conn->rx_len) { | |
2669 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
2670 | skb->len, conn->rx_len); | |
2671 | kfree_skb(conn->rx_skb); | |
2672 | conn->rx_skb = NULL; | |
2673 | conn->rx_len = 0; | |
2674 | l2cap_conn_unreliable(conn, ECOMM); | |
2675 | goto drop; | |
2676 | } | |
2677 | ||
d626f62b | 2678 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 2679 | skb->len); |
1da177e4 LT |
2680 | conn->rx_len -= skb->len; |
2681 | ||
2682 | if (!conn->rx_len) { | |
2683 | /* Complete frame received */ | |
2684 | l2cap_recv_frame(conn, conn->rx_skb); | |
2685 | conn->rx_skb = NULL; | |
2686 | } | |
2687 | } | |
2688 | ||
2689 | drop: | |
2690 | kfree_skb(skb); | |
2691 | return 0; | |
2692 | } | |
2693 | ||
be9d1227 | 2694 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
2695 | { |
2696 | struct sock *sk; | |
2697 | struct hlist_node *node; | |
be9d1227 | 2698 | char *str = buf; |
1da177e4 LT |
2699 | |
2700 | read_lock_bh(&l2cap_sk_list.lock); | |
2701 | ||
be9d1227 MH |
2702 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
2703 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1da177e4 | 2704 | |
2af6b9d5 | 2705 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
be9d1227 | 2706 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), |
73863976 | 2707 | sk->sk_state, btohs(pi->psm), pi->scid, pi->dcid, |
2af6b9d5 | 2708 | pi->imtu, pi->omtu, pi->sec_level); |
be9d1227 | 2709 | } |
1da177e4 | 2710 | |
1da177e4 | 2711 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 2712 | |
be9d1227 | 2713 | return (str - buf); |
1da177e4 LT |
2714 | } |
2715 | ||
be9d1227 | 2716 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
1da177e4 | 2717 | |
90ddc4f0 | 2718 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
2719 | .family = PF_BLUETOOTH, |
2720 | .owner = THIS_MODULE, | |
2721 | .release = l2cap_sock_release, | |
2722 | .bind = l2cap_sock_bind, | |
2723 | .connect = l2cap_sock_connect, | |
2724 | .listen = l2cap_sock_listen, | |
2725 | .accept = l2cap_sock_accept, | |
2726 | .getname = l2cap_sock_getname, | |
2727 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 2728 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 2729 | .poll = bt_sock_poll, |
3241ad82 | 2730 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
2731 | .mmap = sock_no_mmap, |
2732 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
2733 | .shutdown = l2cap_sock_shutdown, |
2734 | .setsockopt = l2cap_sock_setsockopt, | |
2735 | .getsockopt = l2cap_sock_getsockopt | |
2736 | }; | |
2737 | ||
2738 | static struct net_proto_family l2cap_sock_family_ops = { | |
2739 | .family = PF_BLUETOOTH, | |
2740 | .owner = THIS_MODULE, | |
2741 | .create = l2cap_sock_create, | |
2742 | }; | |
2743 | ||
2744 | static struct hci_proto l2cap_hci_proto = { | |
2745 | .name = "L2CAP", | |
2746 | .id = HCI_PROTO_L2CAP, | |
2747 | .connect_ind = l2cap_connect_ind, | |
2748 | .connect_cfm = l2cap_connect_cfm, | |
2749 | .disconn_ind = l2cap_disconn_ind, | |
2950f21a | 2750 | .disconn_cfm = l2cap_disconn_cfm, |
8c1b2355 | 2751 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
2752 | .recv_acldata = l2cap_recv_acldata |
2753 | }; | |
2754 | ||
2755 | static int __init l2cap_init(void) | |
2756 | { | |
2757 | int err; | |
be9d1227 | 2758 | |
1da177e4 LT |
2759 | err = proto_register(&l2cap_proto, 0); |
2760 | if (err < 0) | |
2761 | return err; | |
2762 | ||
2763 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
2764 | if (err < 0) { | |
2765 | BT_ERR("L2CAP socket registration failed"); | |
2766 | goto error; | |
2767 | } | |
2768 | ||
2769 | err = hci_register_proto(&l2cap_hci_proto); | |
2770 | if (err < 0) { | |
2771 | BT_ERR("L2CAP protocol registration failed"); | |
2772 | bt_sock_unregister(BTPROTO_L2CAP); | |
2773 | goto error; | |
2774 | } | |
2775 | ||
df5c37ea MH |
2776 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
2777 | BT_ERR("Failed to create L2CAP info file"); | |
1da177e4 LT |
2778 | |
2779 | BT_INFO("L2CAP ver %s", VERSION); | |
2780 | BT_INFO("L2CAP socket layer initialized"); | |
2781 | ||
2782 | return 0; | |
2783 | ||
2784 | error: | |
2785 | proto_unregister(&l2cap_proto); | |
2786 | return err; | |
2787 | } | |
2788 | ||
2789 | static void __exit l2cap_exit(void) | |
2790 | { | |
a91f2e39 | 2791 | class_remove_file(bt_class, &class_attr_l2cap); |
1da177e4 LT |
2792 | |
2793 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
2794 | BT_ERR("L2CAP socket unregistration failed"); | |
2795 | ||
2796 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
2797 | BT_ERR("L2CAP protocol unregistration failed"); | |
2798 | ||
2799 | proto_unregister(&l2cap_proto); | |
2800 | } | |
2801 | ||
2802 | void l2cap_load(void) | |
2803 | { | |
2804 | /* Dummy function to trigger automatic L2CAP module loading by | |
2805 | * other modules that use L2CAP sockets but don't use any other | |
2806 | * symbols from it. */ | |
2807 | return; | |
2808 | } | |
2809 | EXPORT_SYMBOL(l2cap_load); | |
2810 | ||
2811 | module_init(l2cap_init); | |
2812 | module_exit(l2cap_exit); | |
2813 | ||
63fbd24e | 2814 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
2815 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
2816 | MODULE_VERSION(VERSION); | |
2817 | MODULE_LICENSE("GPL"); | |
2818 | MODULE_ALIAS("bt-proto-0"); |