Commit | Line | Data |
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8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth L2CAP core and sockets. */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
4fc268d2 | 30 | #include <linux/capability.h> |
1da177e4 LT |
31 | #include <linux/errno.h> |
32 | #include <linux/kernel.h> | |
1da177e4 LT |
33 | #include <linux/sched.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/fcntl.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/socket.h> | |
40 | #include <linux/skbuff.h> | |
1da177e4 | 41 | #include <linux/list.h> |
be9d1227 | 42 | #include <linux/device.h> |
af05b30b | 43 | #include <linux/uaccess.h> |
1da177e4 LT |
44 | #include <net/sock.h> |
45 | ||
46 | #include <asm/system.h> | |
1da177e4 LT |
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 | |
47ec1dcd | 55 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
e1027a7c | 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); | |
af05b30b GP |
137 | if (s) |
138 | bh_lock_sock(s); | |
0139418c MH |
139 | read_unlock(&l->lock); |
140 | return s; | |
141 | } | |
142 | ||
143 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
144 | { | |
145 | struct sock *s; | |
146 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
147 | if (l2cap_pi(s)->ident == ident) | |
148 | break; | |
149 | } | |
150 | return s; | |
151 | } | |
152 | ||
153 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
154 | { | |
155 | struct sock *s; | |
156 | read_lock(&l->lock); | |
157 | s = __l2cap_get_chan_by_ident(l, ident); | |
af05b30b GP |
158 | if (s) |
159 | bh_lock_sock(s); | |
0139418c MH |
160 | read_unlock(&l->lock); |
161 | return s; | |
162 | } | |
163 | ||
164 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
165 | { | |
8db4dc46 | 166 | u16 cid = L2CAP_CID_DYN_START; |
0139418c | 167 | |
8db4dc46 | 168 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
af05b30b | 169 | if (!__l2cap_get_chan_by_scid(l, cid)) |
0139418c MH |
170 | return cid; |
171 | } | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
177 | { | |
178 | sock_hold(sk); | |
179 | ||
180 | if (l->head) | |
181 | l2cap_pi(l->head)->prev_c = sk; | |
182 | ||
183 | l2cap_pi(sk)->next_c = l->head; | |
184 | l2cap_pi(sk)->prev_c = NULL; | |
185 | l->head = sk; | |
186 | } | |
187 | ||
188 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
189 | { | |
190 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
191 | ||
fd1278d7 | 192 | write_lock_bh(&l->lock); |
0139418c MH |
193 | if (sk == l->head) |
194 | l->head = next; | |
195 | ||
196 | if (next) | |
197 | l2cap_pi(next)->prev_c = prev; | |
198 | if (prev) | |
199 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 200 | write_unlock_bh(&l->lock); |
0139418c MH |
201 | |
202 | __sock_put(sk); | |
203 | } | |
204 | ||
205 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
206 | { | |
207 | struct l2cap_chan_list *l = &conn->chan_list; | |
208 | ||
af05b30b GP |
209 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
210 | l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
0139418c | 211 | |
2950f21a MH |
212 | conn->disc_reason = 0x13; |
213 | ||
0139418c MH |
214 | l2cap_pi(sk)->conn = conn; |
215 | ||
216 | if (sk->sk_type == SOCK_SEQPACKET) { | |
217 | /* Alloc CID for connection-oriented socket */ | |
218 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
219 | } else if (sk->sk_type == SOCK_DGRAM) { | |
220 | /* Connectionless socket */ | |
8db4dc46 GP |
221 | l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS; |
222 | l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS; | |
0139418c MH |
223 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
224 | } else { | |
225 | /* Raw socket can send/recv signalling messages only */ | |
8db4dc46 GP |
226 | l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING; |
227 | l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING; | |
0139418c MH |
228 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
229 | } | |
230 | ||
231 | __l2cap_chan_link(l, sk); | |
232 | ||
233 | if (parent) | |
234 | bt_accept_enqueue(parent, sk); | |
235 | } | |
236 | ||
8e87d142 | 237 | /* Delete channel. |
0139418c MH |
238 | * Must be called on the locked socket. */ |
239 | static void l2cap_chan_del(struct sock *sk, int err) | |
240 | { | |
241 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
242 | struct sock *parent = bt_sk(sk)->parent; | |
243 | ||
244 | l2cap_sock_clear_timer(sk); | |
245 | ||
246 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
247 | ||
8e87d142 | 248 | if (conn) { |
0139418c MH |
249 | /* Unlink from channel list */ |
250 | l2cap_chan_unlink(&conn->chan_list, sk); | |
251 | l2cap_pi(sk)->conn = NULL; | |
252 | hci_conn_put(conn->hcon); | |
253 | } | |
254 | ||
b1235d79 | 255 | sk->sk_state = BT_CLOSED; |
0139418c MH |
256 | sock_set_flag(sk, SOCK_ZAPPED); |
257 | ||
258 | if (err) | |
259 | sk->sk_err = err; | |
260 | ||
261 | if (parent) { | |
262 | bt_accept_unlink(sk); | |
263 | parent->sk_data_ready(parent, 0); | |
264 | } else | |
265 | sk->sk_state_change(sk); | |
266 | } | |
267 | ||
79d554a6 | 268 | /* Service level security */ |
2af6b9d5 | 269 | static inline int l2cap_check_security(struct sock *sk) |
79d554a6 MH |
270 | { |
271 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
0684e5f9 MH |
272 | __u8 auth_type; |
273 | ||
00ae4af9 MH |
274 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
275 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
276 | auth_type = HCI_AT_NO_BONDING_MITM; | |
277 | else | |
af05b30b | 278 | auth_type = HCI_AT_NO_BONDING; |
00ae4af9 MH |
279 | |
280 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
281 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
282 | } else { | |
283 | switch (l2cap_pi(sk)->sec_level) { | |
284 | case BT_SECURITY_HIGH: | |
285 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
286 | break; | |
287 | case BT_SECURITY_MEDIUM: | |
288 | auth_type = HCI_AT_GENERAL_BONDING; | |
289 | break; | |
290 | default: | |
291 | auth_type = HCI_AT_NO_BONDING; | |
292 | break; | |
293 | } | |
0684e5f9 | 294 | } |
79d554a6 | 295 | |
0684e5f9 MH |
296 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
297 | auth_type); | |
79d554a6 MH |
298 | } |
299 | ||
4e8402a3 MH |
300 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
301 | { | |
302 | u8 id; | |
303 | ||
304 | /* Get next available identificator. | |
305 | * 1 - 128 are used by kernel. | |
306 | * 129 - 199 are reserved. | |
307 | * 200 - 254 are used by utilities like l2ping, etc. | |
308 | */ | |
309 | ||
310 | spin_lock_bh(&conn->lock); | |
311 | ||
312 | if (++conn->tx_ident > 128) | |
313 | conn->tx_ident = 1; | |
314 | ||
315 | id = conn->tx_ident; | |
316 | ||
317 | spin_unlock_bh(&conn->lock); | |
318 | ||
319 | return id; | |
320 | } | |
321 | ||
322 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) | |
323 | { | |
324 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
325 | ||
326 | BT_DBG("code 0x%2.2x", code); | |
327 | ||
328 | if (!skb) | |
329 | return -ENOMEM; | |
330 | ||
331 | return hci_send_acl(conn->hcon, skb, 0); | |
332 | } | |
333 | ||
79d554a6 MH |
334 | static void l2cap_do_start(struct sock *sk) |
335 | { | |
336 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
337 | ||
338 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
984947dc MH |
339 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
340 | return; | |
341 | ||
2af6b9d5 | 342 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
343 | struct l2cap_conn_req req; |
344 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
345 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 346 | |
b1235d79 | 347 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 348 | |
b1235d79 | 349 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 350 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 351 | } |
79d554a6 MH |
352 | } else { |
353 | struct l2cap_info_req req; | |
354 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
355 | ||
356 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
357 | conn->info_ident = l2cap_get_ident(conn); | |
358 | ||
359 | mod_timer(&conn->info_timer, jiffies + | |
360 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
361 | ||
362 | l2cap_send_cmd(conn, conn->info_ident, | |
363 | L2CAP_INFO_REQ, sizeof(req), &req); | |
364 | } | |
365 | } | |
366 | ||
1da177e4 | 367 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
368 | static void l2cap_conn_start(struct l2cap_conn *conn) |
369 | { | |
370 | struct l2cap_chan_list *l = &conn->chan_list; | |
371 | struct sock *sk; | |
372 | ||
373 | BT_DBG("conn %p", conn); | |
374 | ||
375 | read_lock(&l->lock); | |
376 | ||
377 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
378 | bh_lock_sock(sk); | |
379 | ||
380 | if (sk->sk_type != SOCK_SEQPACKET) { | |
79d554a6 MH |
381 | bh_unlock_sock(sk); |
382 | continue; | |
383 | } | |
384 | ||
385 | if (sk->sk_state == BT_CONNECT) { | |
2af6b9d5 | 386 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
387 | struct l2cap_conn_req req; |
388 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
389 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 390 | |
b1235d79 | 391 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 392 | |
b1235d79 | 393 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4e8402a3 | 394 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 395 | } |
79d554a6 MH |
396 | } else if (sk->sk_state == BT_CONNECT2) { |
397 | struct l2cap_conn_rsp rsp; | |
398 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
399 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
400 | ||
2af6b9d5 | 401 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
402 | if (bt_sk(sk)->defer_setup) { |
403 | struct sock *parent = bt_sk(sk)->parent; | |
404 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
405 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
406 | parent->sk_data_ready(parent, 0); | |
407 | ||
408 | } else { | |
409 | sk->sk_state = BT_CONFIG; | |
410 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
411 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
412 | } | |
79d554a6 MH |
413 | } else { |
414 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
415 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
416 | } | |
417 | ||
418 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
419 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4e8402a3 MH |
420 | } |
421 | ||
422 | bh_unlock_sock(sk); | |
423 | } | |
424 | ||
425 | read_unlock(&l->lock); | |
426 | } | |
427 | ||
428 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
429 | { | |
79d554a6 MH |
430 | struct l2cap_chan_list *l = &conn->chan_list; |
431 | struct sock *sk; | |
4e8402a3 | 432 | |
79d554a6 | 433 | BT_DBG("conn %p", conn); |
4e8402a3 | 434 | |
79d554a6 | 435 | read_lock(&l->lock); |
4e8402a3 | 436 | |
79d554a6 MH |
437 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
438 | bh_lock_sock(sk); | |
4e8402a3 | 439 | |
79d554a6 MH |
440 | if (sk->sk_type != SOCK_SEQPACKET) { |
441 | l2cap_sock_clear_timer(sk); | |
442 | sk->sk_state = BT_CONNECTED; | |
443 | sk->sk_state_change(sk); | |
444 | } else if (sk->sk_state == BT_CONNECT) | |
445 | l2cap_do_start(sk); | |
4e8402a3 | 446 | |
79d554a6 | 447 | bh_unlock_sock(sk); |
4e8402a3 | 448 | } |
79d554a6 MH |
449 | |
450 | read_unlock(&l->lock); | |
4e8402a3 MH |
451 | } |
452 | ||
453 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
454 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
455 | { | |
456 | struct l2cap_chan_list *l = &conn->chan_list; | |
457 | struct sock *sk; | |
458 | ||
459 | BT_DBG("conn %p", conn); | |
460 | ||
461 | read_lock(&l->lock); | |
462 | ||
463 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 464 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
465 | sk->sk_err = err; |
466 | } | |
467 | ||
468 | read_unlock(&l->lock); | |
469 | } | |
470 | ||
471 | static void l2cap_info_timeout(unsigned long arg) | |
472 | { | |
473 | struct l2cap_conn *conn = (void *) arg; | |
474 | ||
984947dc | 475 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 476 | conn->info_ident = 0; |
984947dc | 477 | |
4e8402a3 MH |
478 | l2cap_conn_start(conn); |
479 | } | |
480 | ||
1da177e4 LT |
481 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
482 | { | |
0139418c | 483 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 484 | |
0139418c | 485 | if (conn || status) |
1da177e4 LT |
486 | return conn; |
487 | ||
0139418c MH |
488 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
489 | if (!conn) | |
1da177e4 | 490 | return NULL; |
1da177e4 LT |
491 | |
492 | hcon->l2cap_data = conn; | |
493 | conn->hcon = hcon; | |
494 | ||
0139418c MH |
495 | BT_DBG("hcon %p conn %p", hcon, conn); |
496 | ||
1da177e4 LT |
497 | conn->mtu = hcon->hdev->acl_mtu; |
498 | conn->src = &hcon->hdev->bdaddr; | |
499 | conn->dst = &hcon->dst; | |
500 | ||
4e8402a3 MH |
501 | conn->feat_mask = 0; |
502 | ||
b1235d79 MH |
503 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
504 | (unsigned long) conn); | |
4e8402a3 | 505 | |
1da177e4 LT |
506 | spin_lock_init(&conn->lock); |
507 | rwlock_init(&conn->chan_list.lock); | |
508 | ||
2950f21a MH |
509 | conn->disc_reason = 0x13; |
510 | ||
1da177e4 LT |
511 | return conn; |
512 | } | |
513 | ||
0139418c | 514 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 515 | { |
0139418c | 516 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
517 | struct sock *sk; |
518 | ||
0139418c MH |
519 | if (!conn) |
520 | return; | |
1da177e4 LT |
521 | |
522 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
523 | ||
7585b97a | 524 | kfree_skb(conn->rx_skb); |
1da177e4 LT |
525 | |
526 | /* Kill channels */ | |
527 | while ((sk = conn->chan_list.head)) { | |
528 | bh_lock_sock(sk); | |
529 | l2cap_chan_del(sk, err); | |
530 | bh_unlock_sock(sk); | |
531 | l2cap_sock_kill(sk); | |
532 | } | |
533 | ||
8e8440f5 DY |
534 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
535 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 536 | |
1da177e4 LT |
537 | hcon->l2cap_data = NULL; |
538 | kfree(conn); | |
1da177e4 LT |
539 | } |
540 | ||
541 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
542 | { | |
543 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 544 | write_lock_bh(&l->lock); |
1da177e4 | 545 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 546 | write_unlock_bh(&l->lock); |
1da177e4 LT |
547 | } |
548 | ||
1da177e4 | 549 | /* ---- Socket interface ---- */ |
8e036fc3 | 550 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
551 | { |
552 | struct sock *sk; | |
553 | struct hlist_node *node; | |
554 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
555 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
556 | goto found; | |
557 | sk = NULL; | |
558 | found: | |
559 | return sk; | |
560 | } | |
561 | ||
562 | /* Find socket with psm and source bdaddr. | |
563 | * Returns closest match. | |
564 | */ | |
8e036fc3 | 565 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
566 | { |
567 | struct sock *sk = NULL, *sk1 = NULL; | |
568 | struct hlist_node *node; | |
569 | ||
570 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
571 | if (state && sk->sk_state != state) | |
572 | continue; | |
573 | ||
574 | if (l2cap_pi(sk)->psm == psm) { | |
575 | /* Exact match. */ | |
576 | if (!bacmp(&bt_sk(sk)->src, src)) | |
577 | break; | |
578 | ||
579 | /* Closest match */ | |
580 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
581 | sk1 = sk; | |
582 | } | |
583 | } | |
584 | return node ? sk : sk1; | |
585 | } | |
586 | ||
587 | /* Find socket with given address (psm, src). | |
588 | * Returns locked socket */ | |
8e036fc3 | 589 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
590 | { |
591 | struct sock *s; | |
592 | read_lock(&l2cap_sk_list.lock); | |
593 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
af05b30b GP |
594 | if (s) |
595 | bh_lock_sock(s); | |
1da177e4 LT |
596 | read_unlock(&l2cap_sk_list.lock); |
597 | return s; | |
598 | } | |
599 | ||
600 | static void l2cap_sock_destruct(struct sock *sk) | |
601 | { | |
602 | BT_DBG("sk %p", sk); | |
603 | ||
604 | skb_queue_purge(&sk->sk_receive_queue); | |
605 | skb_queue_purge(&sk->sk_write_queue); | |
606 | } | |
607 | ||
608 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
609 | { | |
610 | struct sock *sk; | |
611 | ||
612 | BT_DBG("parent %p", parent); | |
613 | ||
614 | /* Close not yet accepted channels */ | |
615 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
616 | l2cap_sock_close(sk); | |
617 | ||
b1235d79 | 618 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
619 | sock_set_flag(parent, SOCK_ZAPPED); |
620 | } | |
621 | ||
622 | /* Kill socket (only if zapped and orphan) | |
623 | * Must be called on unlocked socket. | |
624 | */ | |
625 | static void l2cap_sock_kill(struct sock *sk) | |
626 | { | |
627 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
628 | return; | |
629 | ||
630 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
631 | ||
632 | /* Kill poor orphan */ | |
633 | bt_sock_unlink(&l2cap_sk_list, sk); | |
634 | sock_set_flag(sk, SOCK_DEAD); | |
635 | sock_put(sk); | |
636 | } | |
637 | ||
638 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
639 | { | |
640 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
641 | ||
642 | switch (sk->sk_state) { | |
643 | case BT_LISTEN: | |
644 | l2cap_sock_cleanup_listen(sk); | |
645 | break; | |
646 | ||
647 | case BT_CONNECTED: | |
648 | case BT_CONFIG: | |
1da177e4 LT |
649 | if (sk->sk_type == SOCK_SEQPACKET) { |
650 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
651 | struct l2cap_disconn_req req; | |
652 | ||
653 | sk->sk_state = BT_DISCONN; | |
654 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
655 | ||
aca3192c YH |
656 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
657 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
658 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
659 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
b1235d79 | 660 | } else |
1da177e4 | 661 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
662 | break; |
663 | ||
f66dc81f MH |
664 | case BT_CONNECT2: |
665 | if (sk->sk_type == SOCK_SEQPACKET) { | |
666 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
667 | struct l2cap_conn_rsp rsp; | |
668 | __u16 result; | |
669 | ||
670 | if (bt_sk(sk)->defer_setup) | |
671 | result = L2CAP_CR_SEC_BLOCK; | |
672 | else | |
673 | result = L2CAP_CR_BAD_PSM; | |
674 | ||
675 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
676 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
677 | rsp.result = cpu_to_le16(result); | |
678 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
679 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
680 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
681 | } else | |
682 | l2cap_chan_del(sk, reason); | |
683 | break; | |
684 | ||
1da177e4 LT |
685 | case BT_CONNECT: |
686 | case BT_DISCONN: | |
687 | l2cap_chan_del(sk, reason); | |
688 | break; | |
689 | ||
690 | default: | |
691 | sock_set_flag(sk, SOCK_ZAPPED); | |
692 | break; | |
693 | } | |
694 | } | |
695 | ||
696 | /* Must be called on unlocked socket. */ | |
697 | static void l2cap_sock_close(struct sock *sk) | |
698 | { | |
699 | l2cap_sock_clear_timer(sk); | |
700 | lock_sock(sk); | |
701 | __l2cap_sock_close(sk, ECONNRESET); | |
702 | release_sock(sk); | |
703 | l2cap_sock_kill(sk); | |
704 | } | |
705 | ||
706 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
707 | { | |
708 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
709 | ||
710 | BT_DBG("sk %p", sk); | |
711 | ||
712 | if (parent) { | |
713 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
714 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
715 | ||
1da177e4 LT |
716 | pi->imtu = l2cap_pi(parent)->imtu; |
717 | pi->omtu = l2cap_pi(parent)->omtu; | |
2af6b9d5 MH |
718 | pi->sec_level = l2cap_pi(parent)->sec_level; |
719 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
720 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
721 | } else { |
722 | pi->imtu = L2CAP_DEFAULT_MTU; | |
723 | pi->omtu = 0; | |
2af6b9d5 MH |
724 | pi->sec_level = BT_SECURITY_LOW; |
725 | pi->role_switch = 0; | |
726 | pi->force_reliable = 0; | |
1da177e4 LT |
727 | } |
728 | ||
729 | /* Default config options */ | |
5dee9e7c | 730 | pi->conf_len = 0; |
1da177e4 LT |
731 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
732 | } | |
733 | ||
734 | static struct proto l2cap_proto = { | |
735 | .name = "L2CAP", | |
736 | .owner = THIS_MODULE, | |
737 | .obj_size = sizeof(struct l2cap_pinfo) | |
738 | }; | |
739 | ||
1b8d7ae4 | 740 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
741 | { |
742 | struct sock *sk; | |
743 | ||
6257ff21 | 744 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
745 | if (!sk) |
746 | return NULL; | |
747 | ||
748 | sock_init_data(sock, sk); | |
749 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
750 | ||
751 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 752 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
753 | |
754 | sock_reset_flag(sk, SOCK_ZAPPED); | |
755 | ||
756 | sk->sk_protocol = proto; | |
b1235d79 | 757 | sk->sk_state = BT_OPEN; |
1da177e4 | 758 | |
b1235d79 | 759 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
760 | |
761 | bt_sock_link(&l2cap_sk_list, sk); | |
762 | return sk; | |
763 | } | |
764 | ||
1b8d7ae4 | 765 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
766 | { |
767 | struct sock *sk; | |
768 | ||
769 | BT_DBG("sock %p", sock); | |
770 | ||
771 | sock->state = SS_UNCONNECTED; | |
772 | ||
773 | if (sock->type != SOCK_SEQPACKET && | |
774 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
775 | return -ESOCKTNOSUPPORT; | |
776 | ||
777 | if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW)) | |
778 | return -EPERM; | |
779 | ||
780 | sock->ops = &l2cap_sock_ops; | |
781 | ||
1b8d7ae4 | 782 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
783 | if (!sk) |
784 | return -ENOMEM; | |
785 | ||
786 | l2cap_sock_init(sk, NULL); | |
787 | return 0; | |
788 | } | |
789 | ||
f29972de | 790 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
1da177e4 | 791 | { |
1da177e4 | 792 | struct sock *sk = sock->sk; |
f29972de MH |
793 | struct sockaddr_l2 la; |
794 | int len, err = 0; | |
1da177e4 | 795 | |
f29972de | 796 | BT_DBG("sk %p", sk); |
1da177e4 LT |
797 | |
798 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
799 | return -EINVAL; | |
800 | ||
f29972de MH |
801 | memset(&la, 0, sizeof(la)); |
802 | len = min_t(unsigned int, sizeof(la), alen); | |
803 | memcpy(&la, addr, len); | |
804 | ||
2a517ca6 MH |
805 | if (la.l2_cid) |
806 | return -EINVAL; | |
807 | ||
1da177e4 LT |
808 | lock_sock(sk); |
809 | ||
810 | if (sk->sk_state != BT_OPEN) { | |
811 | err = -EBADFD; | |
812 | goto done; | |
813 | } | |
814 | ||
b4324b5d | 815 | if (la.l2_psm && __le16_to_cpu(la.l2_psm) < 0x1001 && |
847641d7 MH |
816 | !capable(CAP_NET_BIND_SERVICE)) { |
817 | err = -EACCES; | |
818 | goto done; | |
819 | } | |
8e87d142 | 820 | |
1da177e4 LT |
821 | write_lock_bh(&l2cap_sk_list.lock); |
822 | ||
f29972de | 823 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
1da177e4 LT |
824 | err = -EADDRINUSE; |
825 | } else { | |
826 | /* Save source address */ | |
f29972de MH |
827 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
828 | l2cap_pi(sk)->psm = la.l2_psm; | |
829 | l2cap_pi(sk)->sport = la.l2_psm; | |
1da177e4 | 830 | sk->sk_state = BT_BOUND; |
2af6b9d5 | 831 | |
b4324b5d MH |
832 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
833 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
2af6b9d5 | 834 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
1da177e4 LT |
835 | } |
836 | ||
837 | write_unlock_bh(&l2cap_sk_list.lock); | |
838 | ||
839 | done: | |
840 | release_sock(sk); | |
841 | return err; | |
842 | } | |
843 | ||
844 | static int l2cap_do_connect(struct sock *sk) | |
845 | { | |
846 | bdaddr_t *src = &bt_sk(sk)->src; | |
847 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
848 | struct l2cap_conn *conn; | |
849 | struct hci_conn *hcon; | |
850 | struct hci_dev *hdev; | |
09ab6f4c | 851 | __u8 auth_type; |
44d0e48e | 852 | int err; |
1da177e4 | 853 | |
f29972de MH |
854 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
855 | l2cap_pi(sk)->psm); | |
1da177e4 | 856 | |
af05b30b GP |
857 | hdev = hci_get_route(dst, src); |
858 | if (!hdev) | |
1da177e4 LT |
859 | return -EHOSTUNREACH; |
860 | ||
861 | hci_dev_lock_bh(hdev); | |
862 | ||
863 | err = -ENOMEM; | |
864 | ||
8c1b2355 | 865 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
866 | switch (l2cap_pi(sk)->sec_level) { |
867 | case BT_SECURITY_HIGH: | |
8c1b2355 | 868 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
869 | break; |
870 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 871 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
872 | break; |
873 | default: | |
09ab6f4c | 874 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
875 | break; |
876 | } | |
8c1b2355 | 877 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 878 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 879 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 880 | else |
8c1b2355 | 881 | auth_type = HCI_AT_NO_BONDING; |
435fef20 MH |
882 | |
883 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
884 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
8c1b2355 | 885 | } else { |
2af6b9d5 MH |
886 | switch (l2cap_pi(sk)->sec_level) { |
887 | case BT_SECURITY_HIGH: | |
8c1b2355 | 888 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
889 | break; |
890 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 891 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
892 | break; |
893 | default: | |
8c1b2355 | 894 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
895 | break; |
896 | } | |
09ab6f4c MH |
897 | } |
898 | ||
2af6b9d5 MH |
899 | hcon = hci_connect(hdev, ACL_LINK, dst, |
900 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
901 | if (!hcon) |
902 | goto done; | |
903 | ||
904 | conn = l2cap_conn_add(hcon, 0); | |
905 | if (!conn) { | |
906 | hci_conn_put(hcon); | |
907 | goto done; | |
908 | } | |
909 | ||
910 | err = 0; | |
911 | ||
912 | /* Update source addr of the socket */ | |
913 | bacpy(src, conn->src); | |
914 | ||
915 | l2cap_chan_add(conn, sk, NULL); | |
916 | ||
917 | sk->sk_state = BT_CONNECT; | |
918 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
919 | ||
920 | if (hcon->state == BT_CONNECTED) { | |
79d554a6 | 921 | if (sk->sk_type != SOCK_SEQPACKET) { |
1da177e4 LT |
922 | l2cap_sock_clear_timer(sk); |
923 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
924 | } else |
925 | l2cap_do_start(sk); | |
1da177e4 LT |
926 | } |
927 | ||
928 | done: | |
929 | hci_dev_unlock_bh(hdev); | |
930 | hci_dev_put(hdev); | |
931 | return err; | |
932 | } | |
933 | ||
934 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
935 | { | |
1da177e4 | 936 | struct sock *sk = sock->sk; |
f29972de MH |
937 | struct sockaddr_l2 la; |
938 | int len, err = 0; | |
1da177e4 | 939 | |
1da177e4 LT |
940 | BT_DBG("sk %p", sk); |
941 | ||
2a517ca6 MH |
942 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
943 | return -EINVAL; | |
1da177e4 | 944 | |
f29972de MH |
945 | memset(&la, 0, sizeof(la)); |
946 | len = min_t(unsigned int, sizeof(la), alen); | |
947 | memcpy(&la, addr, len); | |
948 | ||
2a517ca6 MH |
949 | if (la.l2_cid) |
950 | return -EINVAL; | |
951 | ||
952 | lock_sock(sk); | |
953 | ||
f29972de | 954 | if (sk->sk_type == SOCK_SEQPACKET && !la.l2_psm) { |
1da177e4 LT |
955 | err = -EINVAL; |
956 | goto done; | |
957 | } | |
958 | ||
af05b30b | 959 | switch (sk->sk_state) { |
1da177e4 LT |
960 | case BT_CONNECT: |
961 | case BT_CONNECT2: | |
962 | case BT_CONFIG: | |
963 | /* Already connecting */ | |
964 | goto wait; | |
965 | ||
966 | case BT_CONNECTED: | |
967 | /* Already connected */ | |
968 | goto done; | |
969 | ||
970 | case BT_OPEN: | |
971 | case BT_BOUND: | |
972 | /* Can connect */ | |
973 | break; | |
974 | ||
975 | default: | |
976 | err = -EBADFD; | |
977 | goto done; | |
978 | } | |
979 | ||
980 | /* Set destination address and psm */ | |
f29972de MH |
981 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
982 | l2cap_pi(sk)->psm = la.l2_psm; | |
1da177e4 | 983 | |
af05b30b GP |
984 | err = l2cap_do_connect(sk); |
985 | if (err) | |
1da177e4 LT |
986 | goto done; |
987 | ||
988 | wait: | |
989 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
990 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
991 | done: | |
992 | release_sock(sk); | |
993 | return err; | |
994 | } | |
995 | ||
996 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
997 | { | |
998 | struct sock *sk = sock->sk; | |
999 | int err = 0; | |
1000 | ||
1001 | BT_DBG("sk %p backlog %d", sk, backlog); | |
1002 | ||
1003 | lock_sock(sk); | |
1004 | ||
1005 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
1006 | err = -EBADFD; | |
1007 | goto done; | |
1008 | } | |
1009 | ||
1010 | if (!l2cap_pi(sk)->psm) { | |
1011 | bdaddr_t *src = &bt_sk(sk)->src; | |
1012 | u16 psm; | |
1013 | ||
1014 | err = -EINVAL; | |
1015 | ||
1016 | write_lock_bh(&l2cap_sk_list.lock); | |
1017 | ||
1018 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
b4324b5d MH |
1019 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
1020 | l2cap_pi(sk)->psm = cpu_to_le16(psm); | |
1021 | l2cap_pi(sk)->sport = cpu_to_le16(psm); | |
1da177e4 LT |
1022 | err = 0; |
1023 | break; | |
1024 | } | |
1025 | ||
1026 | write_unlock_bh(&l2cap_sk_list.lock); | |
1027 | ||
1028 | if (err < 0) | |
1029 | goto done; | |
1030 | } | |
1031 | ||
1032 | sk->sk_max_ack_backlog = backlog; | |
1033 | sk->sk_ack_backlog = 0; | |
1034 | sk->sk_state = BT_LISTEN; | |
1035 | ||
1036 | done: | |
1037 | release_sock(sk); | |
1038 | return err; | |
1039 | } | |
1040 | ||
1041 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
1042 | { | |
1043 | DECLARE_WAITQUEUE(wait, current); | |
1044 | struct sock *sk = sock->sk, *nsk; | |
1045 | long timeo; | |
1046 | int err = 0; | |
1047 | ||
fcc70d5f | 1048 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1049 | |
1050 | if (sk->sk_state != BT_LISTEN) { | |
1051 | err = -EBADFD; | |
1052 | goto done; | |
1053 | } | |
1054 | ||
1055 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1056 | ||
1057 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1058 | ||
1059 | /* Wait for an incoming connection. (wake-one). */ | |
1060 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
1061 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
1062 | set_current_state(TASK_INTERRUPTIBLE); | |
1063 | if (!timeo) { | |
1064 | err = -EAGAIN; | |
1065 | break; | |
1066 | } | |
1067 | ||
1068 | release_sock(sk); | |
1069 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1070 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1071 | |
1072 | if (sk->sk_state != BT_LISTEN) { | |
1073 | err = -EBADFD; | |
1074 | break; | |
1075 | } | |
1076 | ||
1077 | if (signal_pending(current)) { | |
1078 | err = sock_intr_errno(timeo); | |
1079 | break; | |
1080 | } | |
1081 | } | |
1082 | set_current_state(TASK_RUNNING); | |
1083 | remove_wait_queue(sk->sk_sleep, &wait); | |
1084 | ||
1085 | if (err) | |
1086 | goto done; | |
1087 | ||
1088 | newsock->state = SS_CONNECTED; | |
1089 | ||
1090 | BT_DBG("new socket %p", nsk); | |
1091 | ||
1092 | done: | |
1093 | release_sock(sk); | |
1094 | return err; | |
1095 | } | |
1096 | ||
1097 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1098 | { | |
1099 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1100 | struct sock *sk = sock->sk; | |
1101 | ||
1102 | BT_DBG("sock %p, sk %p", sock, sk); | |
1103 | ||
1104 | addr->sa_family = AF_BLUETOOTH; | |
1105 | *len = sizeof(struct sockaddr_l2); | |
1106 | ||
f29972de MH |
1107 | if (peer) { |
1108 | la->l2_psm = l2cap_pi(sk)->psm; | |
1da177e4 | 1109 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
b4324b5d | 1110 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
f29972de MH |
1111 | } else { |
1112 | la->l2_psm = l2cap_pi(sk)->sport; | |
1da177e4 | 1113 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
b4324b5d | 1114 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
f29972de | 1115 | } |
1da177e4 | 1116 | |
1da177e4 LT |
1117 | return 0; |
1118 | } | |
1119 | ||
1120 | static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len) | |
1121 | { | |
1122 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1123 | struct sk_buff *skb, **frag; | |
af05b30b | 1124 | int err, hlen, count, sent = 0; |
1da177e4 LT |
1125 | struct l2cap_hdr *lh; |
1126 | ||
1127 | BT_DBG("sk %p len %d", sk, len); | |
1128 | ||
1129 | /* First fragment (with L2CAP header) */ | |
1130 | if (sk->sk_type == SOCK_DGRAM) | |
1131 | hlen = L2CAP_HDR_SIZE + 2; | |
1132 | else | |
1133 | hlen = L2CAP_HDR_SIZE; | |
1134 | ||
1135 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1136 | ||
1137 | skb = bt_skb_send_alloc(sk, hlen + count, | |
1138 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1139 | if (!skb) | |
1140 | return err; | |
1141 | ||
1142 | /* Create L2CAP header */ | |
1143 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c YH |
1144 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
1145 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1da177e4 LT |
1146 | |
1147 | if (sk->sk_type == SOCK_DGRAM) | |
8e036fc3 | 1148 | put_unaligned(l2cap_pi(sk)->psm, (__le16 *) skb_put(skb, 2)); |
1da177e4 LT |
1149 | |
1150 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
1151 | err = -EFAULT; | |
1152 | goto fail; | |
1153 | } | |
1154 | ||
1155 | sent += count; | |
1156 | len -= count; | |
1157 | ||
1158 | /* Continuation fragments (no L2CAP header) */ | |
1159 | frag = &skb_shinfo(skb)->frag_list; | |
1160 | while (len) { | |
1161 | count = min_t(unsigned int, conn->mtu, len); | |
1162 | ||
1163 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1164 | if (!*frag) | |
1165 | goto fail; | |
8e87d142 | 1166 | |
1da177e4 LT |
1167 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) { |
1168 | err = -EFAULT; | |
1169 | goto fail; | |
1170 | } | |
1171 | ||
1172 | sent += count; | |
1173 | len -= count; | |
1174 | ||
1175 | frag = &(*frag)->next; | |
1176 | } | |
af05b30b GP |
1177 | err = hci_send_acl(conn->hcon, skb, 0); |
1178 | if (err < 0) | |
1da177e4 LT |
1179 | goto fail; |
1180 | ||
1181 | return sent; | |
1182 | ||
1183 | fail: | |
1184 | kfree_skb(skb); | |
1185 | return err; | |
1186 | } | |
1187 | ||
1188 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
1189 | { | |
1190 | struct sock *sk = sock->sk; | |
1191 | int err = 0; | |
1192 | ||
1193 | BT_DBG("sock %p, sk %p", sock, sk); | |
1194 | ||
c1cbe4b7 BL |
1195 | err = sock_error(sk); |
1196 | if (err) | |
1197 | return err; | |
1da177e4 LT |
1198 | |
1199 | if (msg->msg_flags & MSG_OOB) | |
1200 | return -EOPNOTSUPP; | |
1201 | ||
1202 | /* Check outgoing MTU */ | |
1203 | if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu) | |
1204 | return -EINVAL; | |
1205 | ||
1206 | lock_sock(sk); | |
1207 | ||
1208 | if (sk->sk_state == BT_CONNECTED) | |
1209 | err = l2cap_do_send(sk, msg, len); | |
1210 | else | |
1211 | err = -ENOTCONN; | |
1212 | ||
1213 | release_sock(sk); | |
1214 | return err; | |
1215 | } | |
1216 | ||
f66dc81f MH |
1217 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1218 | { | |
1219 | struct sock *sk = sock->sk; | |
1220 | ||
1221 | lock_sock(sk); | |
1222 | ||
1223 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1224 | struct l2cap_conn_rsp rsp; | |
1225 | ||
1226 | sk->sk_state = BT_CONFIG; | |
1227 | ||
1228 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1229 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1230 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1231 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1232 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1233 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1234 | ||
1235 | release_sock(sk); | |
1236 | return 0; | |
1237 | } | |
1238 | ||
1239 | release_sock(sk); | |
1240 | ||
1241 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1242 | } | |
1243 | ||
d58daf42 | 1244 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen) |
1da177e4 LT |
1245 | { |
1246 | struct sock *sk = sock->sk; | |
1247 | struct l2cap_options opts; | |
f29972de | 1248 | int len, err = 0; |
1da177e4 LT |
1249 | u32 opt; |
1250 | ||
1251 | BT_DBG("sk %p", sk); | |
1252 | ||
1253 | lock_sock(sk); | |
1254 | ||
1255 | switch (optname) { | |
1256 | case L2CAP_OPTIONS: | |
0878b666 MH |
1257 | opts.imtu = l2cap_pi(sk)->imtu; |
1258 | opts.omtu = l2cap_pi(sk)->omtu; | |
1259 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
6464f35f | 1260 | opts.mode = L2CAP_MODE_BASIC; |
0878b666 | 1261 | |
1da177e4 LT |
1262 | len = min_t(unsigned int, sizeof(opts), optlen); |
1263 | if (copy_from_user((char *) &opts, optval, len)) { | |
1264 | err = -EFAULT; | |
1265 | break; | |
1266 | } | |
0878b666 | 1267 | |
1da177e4 LT |
1268 | l2cap_pi(sk)->imtu = opts.imtu; |
1269 | l2cap_pi(sk)->omtu = opts.omtu; | |
1270 | break; | |
1271 | ||
1272 | case L2CAP_LM: | |
1273 | if (get_user(opt, (u32 __user *) optval)) { | |
1274 | err = -EFAULT; | |
1275 | break; | |
1276 | } | |
1277 | ||
2af6b9d5 MH |
1278 | if (opt & L2CAP_LM_AUTH) |
1279 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
1280 | if (opt & L2CAP_LM_ENCRYPT) | |
1281 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
1282 | if (opt & L2CAP_LM_SECURE) | |
1283 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
1284 | ||
1285 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
1286 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
1287 | break; |
1288 | ||
1289 | default: | |
1290 | err = -ENOPROTOOPT; | |
1291 | break; | |
1292 | } | |
1293 | ||
1294 | release_sock(sk); | |
1295 | return err; | |
1296 | } | |
1297 | ||
d58daf42 MH |
1298 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) |
1299 | { | |
1300 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
1301 | struct bt_security sec; |
1302 | int len, err = 0; | |
f66dc81f | 1303 | u32 opt; |
d58daf42 MH |
1304 | |
1305 | BT_DBG("sk %p", sk); | |
1306 | ||
1307 | if (level == SOL_L2CAP) | |
1308 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
1309 | ||
0588d94f MH |
1310 | if (level != SOL_BLUETOOTH) |
1311 | return -ENOPROTOOPT; | |
1312 | ||
d58daf42 MH |
1313 | lock_sock(sk); |
1314 | ||
1315 | switch (optname) { | |
2af6b9d5 | 1316 | case BT_SECURITY: |
2526d3d8 | 1317 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1318 | err = -EINVAL; |
1319 | break; | |
1320 | } | |
1321 | ||
2af6b9d5 MH |
1322 | sec.level = BT_SECURITY_LOW; |
1323 | ||
1324 | len = min_t(unsigned int, sizeof(sec), optlen); | |
1325 | if (copy_from_user((char *) &sec, optval, len)) { | |
1326 | err = -EFAULT; | |
1327 | break; | |
1328 | } | |
1329 | ||
1330 | if (sec.level < BT_SECURITY_LOW || | |
1331 | sec.level > BT_SECURITY_HIGH) { | |
1332 | err = -EINVAL; | |
1333 | break; | |
1334 | } | |
1335 | ||
1336 | l2cap_pi(sk)->sec_level = sec.level; | |
1337 | break; | |
1338 | ||
f66dc81f MH |
1339 | case BT_DEFER_SETUP: |
1340 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1341 | err = -EINVAL; | |
1342 | break; | |
1343 | } | |
1344 | ||
1345 | if (get_user(opt, (u32 __user *) optval)) { | |
1346 | err = -EFAULT; | |
1347 | break; | |
1348 | } | |
1349 | ||
1350 | bt_sk(sk)->defer_setup = opt; | |
1351 | break; | |
1352 | ||
d58daf42 MH |
1353 | default: |
1354 | err = -ENOPROTOOPT; | |
1355 | break; | |
1356 | } | |
1357 | ||
1358 | release_sock(sk); | |
1359 | return err; | |
1360 | } | |
1361 | ||
1362 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
1363 | { |
1364 | struct sock *sk = sock->sk; | |
1365 | struct l2cap_options opts; | |
1366 | struct l2cap_conninfo cinfo; | |
1367 | int len, err = 0; | |
2af6b9d5 | 1368 | u32 opt; |
1da177e4 LT |
1369 | |
1370 | BT_DBG("sk %p", sk); | |
1371 | ||
1372 | if (get_user(len, optlen)) | |
1373 | return -EFAULT; | |
1374 | ||
1375 | lock_sock(sk); | |
1376 | ||
1377 | switch (optname) { | |
1378 | case L2CAP_OPTIONS: | |
1379 | opts.imtu = l2cap_pi(sk)->imtu; | |
1380 | opts.omtu = l2cap_pi(sk)->omtu; | |
1381 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
6464f35f | 1382 | opts.mode = L2CAP_MODE_BASIC; |
1da177e4 LT |
1383 | |
1384 | len = min_t(unsigned int, len, sizeof(opts)); | |
1385 | if (copy_to_user(optval, (char *) &opts, len)) | |
1386 | err = -EFAULT; | |
1387 | ||
1388 | break; | |
1389 | ||
1390 | case L2CAP_LM: | |
2af6b9d5 MH |
1391 | switch (l2cap_pi(sk)->sec_level) { |
1392 | case BT_SECURITY_LOW: | |
1393 | opt = L2CAP_LM_AUTH; | |
1394 | break; | |
1395 | case BT_SECURITY_MEDIUM: | |
1396 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
1397 | break; | |
1398 | case BT_SECURITY_HIGH: | |
1399 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
1400 | L2CAP_LM_SECURE; | |
1401 | break; | |
1402 | default: | |
1403 | opt = 0; | |
1404 | break; | |
1405 | } | |
1406 | ||
1407 | if (l2cap_pi(sk)->role_switch) | |
1408 | opt |= L2CAP_LM_MASTER; | |
1409 | ||
1410 | if (l2cap_pi(sk)->force_reliable) | |
1411 | opt |= L2CAP_LM_RELIABLE; | |
1412 | ||
1413 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
1414 | err = -EFAULT; |
1415 | break; | |
1416 | ||
1417 | case L2CAP_CONNINFO: | |
f66dc81f MH |
1418 | if (sk->sk_state != BT_CONNECTED && |
1419 | !(sk->sk_state == BT_CONNECT2 && | |
1420 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
1421 | err = -ENOTCONN; |
1422 | break; | |
1423 | } | |
1424 | ||
1425 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
1426 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
1427 | ||
1428 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
1429 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
1430 | err = -EFAULT; | |
1431 | ||
1432 | break; | |
1433 | ||
1434 | default: | |
1435 | err = -ENOPROTOOPT; | |
1436 | break; | |
1437 | } | |
1438 | ||
1439 | release_sock(sk); | |
1440 | return err; | |
1441 | } | |
1442 | ||
d58daf42 MH |
1443 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
1444 | { | |
1445 | struct sock *sk = sock->sk; | |
2af6b9d5 | 1446 | struct bt_security sec; |
d58daf42 MH |
1447 | int len, err = 0; |
1448 | ||
1449 | BT_DBG("sk %p", sk); | |
1450 | ||
1451 | if (level == SOL_L2CAP) | |
1452 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
1453 | ||
0588d94f MH |
1454 | if (level != SOL_BLUETOOTH) |
1455 | return -ENOPROTOOPT; | |
1456 | ||
d58daf42 MH |
1457 | if (get_user(len, optlen)) |
1458 | return -EFAULT; | |
1459 | ||
1460 | lock_sock(sk); | |
1461 | ||
1462 | switch (optname) { | |
2af6b9d5 | 1463 | case BT_SECURITY: |
2526d3d8 | 1464 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1465 | err = -EINVAL; |
1466 | break; | |
1467 | } | |
1468 | ||
2af6b9d5 MH |
1469 | sec.level = l2cap_pi(sk)->sec_level; |
1470 | ||
1471 | len = min_t(unsigned int, len, sizeof(sec)); | |
1472 | if (copy_to_user(optval, (char *) &sec, len)) | |
1473 | err = -EFAULT; | |
1474 | ||
1475 | break; | |
1476 | ||
f66dc81f MH |
1477 | case BT_DEFER_SETUP: |
1478 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1479 | err = -EINVAL; | |
1480 | break; | |
1481 | } | |
1482 | ||
1483 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
1484 | err = -EFAULT; | |
1485 | ||
1486 | break; | |
1487 | ||
d58daf42 MH |
1488 | default: |
1489 | err = -ENOPROTOOPT; | |
1490 | break; | |
1491 | } | |
1492 | ||
1493 | release_sock(sk); | |
1494 | return err; | |
1495 | } | |
1496 | ||
1da177e4 LT |
1497 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1498 | { | |
1499 | struct sock *sk = sock->sk; | |
1500 | int err = 0; | |
1501 | ||
1502 | BT_DBG("sock %p, sk %p", sock, sk); | |
1503 | ||
1504 | if (!sk) | |
1505 | return 0; | |
1506 | ||
1507 | lock_sock(sk); | |
1508 | if (!sk->sk_shutdown) { | |
1509 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1510 | l2cap_sock_clear_timer(sk); | |
1511 | __l2cap_sock_close(sk, 0); | |
1512 | ||
1513 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
1514 | err = bt_sock_wait_state(sk, BT_CLOSED, |
1515 | sk->sk_lingertime); | |
1da177e4 LT |
1516 | } |
1517 | release_sock(sk); | |
1518 | return err; | |
1519 | } | |
1520 | ||
1521 | static int l2cap_sock_release(struct socket *sock) | |
1522 | { | |
1523 | struct sock *sk = sock->sk; | |
1524 | int err; | |
1525 | ||
1526 | BT_DBG("sock %p, sk %p", sock, sk); | |
1527 | ||
1528 | if (!sk) | |
1529 | return 0; | |
1530 | ||
1531 | err = l2cap_sock_shutdown(sock, 2); | |
1532 | ||
1533 | sock_orphan(sk); | |
1534 | l2cap_sock_kill(sk); | |
1535 | return err; | |
1536 | } | |
1537 | ||
1da177e4 LT |
1538 | static void l2cap_chan_ready(struct sock *sk) |
1539 | { | |
1540 | struct sock *parent = bt_sk(sk)->parent; | |
1541 | ||
1542 | BT_DBG("sk %p, parent %p", sk, parent); | |
1543 | ||
1544 | l2cap_pi(sk)->conf_state = 0; | |
1545 | l2cap_sock_clear_timer(sk); | |
1546 | ||
1547 | if (!parent) { | |
1548 | /* Outgoing channel. | |
1549 | * Wake up socket sleeping on connect. | |
1550 | */ | |
1551 | sk->sk_state = BT_CONNECTED; | |
1552 | sk->sk_state_change(sk); | |
1553 | } else { | |
1554 | /* Incoming channel. | |
1555 | * Wake up socket sleeping on accept. | |
1556 | */ | |
1557 | parent->sk_data_ready(parent, 0); | |
1558 | } | |
1559 | } | |
1560 | ||
1561 | /* Copy frame to all raw sockets on that connection */ | |
1562 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
1563 | { | |
1564 | struct l2cap_chan_list *l = &conn->chan_list; | |
1565 | struct sk_buff *nskb; | |
af05b30b | 1566 | struct sock *sk; |
1da177e4 LT |
1567 | |
1568 | BT_DBG("conn %p", conn); | |
1569 | ||
1570 | read_lock(&l->lock); | |
1571 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
1572 | if (sk->sk_type != SOCK_RAW) | |
1573 | continue; | |
1574 | ||
1575 | /* Don't send frame to the socket it came from */ | |
1576 | if (skb->sk == sk) | |
1577 | continue; | |
af05b30b GP |
1578 | nskb = skb_clone(skb, GFP_ATOMIC); |
1579 | if (!nskb) | |
1da177e4 LT |
1580 | continue; |
1581 | ||
1582 | if (sock_queue_rcv_skb(sk, nskb)) | |
1583 | kfree_skb(nskb); | |
1584 | } | |
1585 | read_unlock(&l->lock); | |
1586 | } | |
1587 | ||
1588 | /* ---- L2CAP signalling commands ---- */ | |
1589 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
1590 | u8 code, u8 ident, u16 dlen, void *data) | |
1591 | { | |
1592 | struct sk_buff *skb, **frag; | |
1593 | struct l2cap_cmd_hdr *cmd; | |
1594 | struct l2cap_hdr *lh; | |
1595 | int len, count; | |
1596 | ||
af05b30b GP |
1597 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
1598 | conn, code, ident, dlen); | |
1da177e4 LT |
1599 | |
1600 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
1601 | count = min_t(unsigned int, conn->mtu, len); | |
1602 | ||
1603 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
1604 | if (!skb) | |
1605 | return NULL; | |
1606 | ||
1607 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c | 1608 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
8db4dc46 | 1609 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
1da177e4 LT |
1610 | |
1611 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
1612 | cmd->code = code; | |
1613 | cmd->ident = ident; | |
aca3192c | 1614 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
1615 | |
1616 | if (dlen) { | |
1617 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
1618 | memcpy(skb_put(skb, count), data, count); | |
1619 | data += count; | |
1620 | } | |
1621 | ||
1622 | len -= skb->len; | |
1623 | ||
1624 | /* Continuation fragments (no L2CAP header) */ | |
1625 | frag = &skb_shinfo(skb)->frag_list; | |
1626 | while (len) { | |
1627 | count = min_t(unsigned int, conn->mtu, len); | |
1628 | ||
1629 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
1630 | if (!*frag) | |
1631 | goto fail; | |
1632 | ||
1633 | memcpy(skb_put(*frag, count), data, count); | |
1634 | ||
1635 | len -= count; | |
1636 | data += count; | |
1637 | ||
1638 | frag = &(*frag)->next; | |
1639 | } | |
1640 | ||
1641 | return skb; | |
1642 | ||
1643 | fail: | |
1644 | kfree_skb(skb); | |
1645 | return NULL; | |
1646 | } | |
1647 | ||
1648 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
1649 | { | |
1650 | struct l2cap_conf_opt *opt = *ptr; | |
1651 | int len; | |
1652 | ||
1653 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
1654 | *ptr += len; | |
1655 | ||
1656 | *type = opt->type; | |
1657 | *olen = opt->len; | |
1658 | ||
1659 | switch (opt->len) { | |
1660 | case 1: | |
1661 | *val = *((u8 *) opt->val); | |
1662 | break; | |
1663 | ||
1664 | case 2: | |
861d6882 | 1665 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
1666 | break; |
1667 | ||
1668 | case 4: | |
861d6882 | 1669 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
1670 | break; |
1671 | ||
1672 | default: | |
1673 | *val = (unsigned long) opt->val; | |
1674 | break; | |
1675 | } | |
1676 | ||
1677 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
1678 | return len; | |
1679 | } | |
1680 | ||
1da177e4 LT |
1681 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
1682 | { | |
1683 | struct l2cap_conf_opt *opt = *ptr; | |
1684 | ||
1685 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
1686 | ||
1687 | opt->type = type; | |
1688 | opt->len = len; | |
1689 | ||
1690 | switch (len) { | |
1691 | case 1: | |
1692 | *((u8 *) opt->val) = val; | |
1693 | break; | |
1694 | ||
1695 | case 2: | |
8e036fc3 | 1696 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
1697 | break; |
1698 | ||
1699 | case 4: | |
8e036fc3 | 1700 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
1701 | break; |
1702 | ||
1703 | default: | |
1704 | memcpy(opt->val, (void *) val, len); | |
1705 | break; | |
1706 | } | |
1707 | ||
1708 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
1709 | } | |
1710 | ||
1711 | static int l2cap_build_conf_req(struct sock *sk, void *data) | |
1712 | { | |
1713 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1714 | struct l2cap_conf_req *req = data; | |
1715 | void *ptr = req->data; | |
1716 | ||
1717 | BT_DBG("sk %p", sk); | |
1718 | ||
1719 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
1720 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
1721 | ||
1722 | /* FIXME: Need actual value of the flush timeout */ | |
1723 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
1724 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
1725 | ||
aca3192c YH |
1726 | req->dcid = cpu_to_le16(pi->dcid); |
1727 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
1728 | |
1729 | return ptr - data; | |
1730 | } | |
1731 | ||
5dee9e7c | 1732 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
1733 | { |
1734 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
1735 | struct l2cap_conf_rsp *rsp = data; |
1736 | void *ptr = rsp->data; | |
1737 | void *req = pi->conf_req; | |
1738 | int len = pi->conf_len; | |
1739 | int type, hint, olen; | |
1740 | unsigned long val; | |
6464f35f | 1741 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 1742 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 1743 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 1744 | |
5dee9e7c | 1745 | BT_DBG("sk %p", sk); |
820ae1b8 | 1746 | |
5dee9e7c MH |
1747 | while (len >= L2CAP_CONF_OPT_SIZE) { |
1748 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 1749 | |
589d2746 | 1750 | hint = type & L2CAP_CONF_HINT; |
47ec1dcd | 1751 | type &= L2CAP_CONF_MASK; |
5dee9e7c MH |
1752 | |
1753 | switch (type) { | |
1754 | case L2CAP_CONF_MTU: | |
861d6882 | 1755 | mtu = val; |
5dee9e7c MH |
1756 | break; |
1757 | ||
1758 | case L2CAP_CONF_FLUSH_TO: | |
1759 | pi->flush_to = val; | |
1760 | break; | |
1761 | ||
1762 | case L2CAP_CONF_QOS: | |
1763 | break; | |
1764 | ||
6464f35f MH |
1765 | case L2CAP_CONF_RFC: |
1766 | if (olen == sizeof(rfc)) | |
1767 | memcpy(&rfc, (void *) val, olen); | |
1768 | break; | |
1769 | ||
5dee9e7c MH |
1770 | default: |
1771 | if (hint) | |
1772 | break; | |
1773 | ||
1774 | result = L2CAP_CONF_UNKNOWN; | |
1775 | *((u8 *) ptr++) = type; | |
1776 | break; | |
1777 | } | |
1778 | } | |
1779 | ||
1780 | if (result == L2CAP_CONF_SUCCESS) { | |
1781 | /* Configure output options and let the other side know | |
1782 | * which ones we don't like. */ | |
1783 | ||
6464f35f MH |
1784 | if (rfc.mode == L2CAP_MODE_BASIC) { |
1785 | if (mtu < pi->omtu) | |
1786 | result = L2CAP_CONF_UNACCEPT; | |
1787 | else { | |
1788 | pi->omtu = mtu; | |
1789 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
1790 | } | |
1791 | ||
1792 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
1793 | } else { | |
5dee9e7c | 1794 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 1795 | |
6464f35f MH |
1796 | memset(&rfc, 0, sizeof(rfc)); |
1797 | rfc.mode = L2CAP_MODE_BASIC; | |
1798 | ||
1799 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
1800 | sizeof(rfc), (unsigned long) &rfc); | |
1801 | } | |
5dee9e7c MH |
1802 | } |
1803 | ||
1804 | rsp->scid = cpu_to_le16(pi->dcid); | |
1805 | rsp->result = cpu_to_le16(result); | |
1806 | rsp->flags = cpu_to_le16(0x0000); | |
1807 | ||
1808 | return ptr - data; | |
1da177e4 LT |
1809 | } |
1810 | ||
5dee9e7c | 1811 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
1812 | { |
1813 | struct l2cap_conf_rsp *rsp = data; | |
1814 | void *ptr = rsp->data; | |
1da177e4 | 1815 | |
5dee9e7c | 1816 | BT_DBG("sk %p", sk); |
1da177e4 | 1817 | |
aca3192c | 1818 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 1819 | rsp->result = cpu_to_le16(result); |
aca3192c | 1820 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
1821 | |
1822 | return ptr - data; | |
1823 | } | |
1824 | ||
4e8402a3 MH |
1825 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1826 | { | |
1827 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
1828 | ||
1829 | if (rej->reason != 0x0000) | |
1830 | return 0; | |
1831 | ||
1832 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
1833 | cmd->ident == conn->info_ident) { | |
4e8402a3 | 1834 | del_timer(&conn->info_timer); |
984947dc MH |
1835 | |
1836 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
e1027a7c | 1837 | conn->info_ident = 0; |
984947dc | 1838 | |
4e8402a3 MH |
1839 | l2cap_conn_start(conn); |
1840 | } | |
1841 | ||
1842 | return 0; | |
1843 | } | |
1844 | ||
1da177e4 LT |
1845 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
1846 | { | |
1847 | struct l2cap_chan_list *list = &conn->chan_list; | |
1848 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
1849 | struct l2cap_conn_rsp rsp; | |
1850 | struct sock *sk, *parent; | |
e7c29cb1 | 1851 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
1852 | |
1853 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 1854 | __le16 psm = req->psm; |
1da177e4 LT |
1855 | |
1856 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
1857 | ||
1858 | /* Check if we have socket listening on psm */ | |
1859 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
1860 | if (!parent) { | |
1861 | result = L2CAP_CR_BAD_PSM; | |
1862 | goto sendresp; | |
1863 | } | |
1864 | ||
e7c29cb1 MH |
1865 | /* Check if the ACL is secure enough (if not SDP) */ |
1866 | if (psm != cpu_to_le16(0x0001) && | |
1867 | !hci_conn_check_link_mode(conn->hcon)) { | |
2950f21a | 1868 | conn->disc_reason = 0x05; |
e7c29cb1 MH |
1869 | result = L2CAP_CR_SEC_BLOCK; |
1870 | goto response; | |
1871 | } | |
1872 | ||
1da177e4 LT |
1873 | result = L2CAP_CR_NO_MEM; |
1874 | ||
1875 | /* Check for backlog size */ | |
1876 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 1877 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
1878 | goto response; |
1879 | } | |
1880 | ||
3b1e0a65 | 1881 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
1882 | if (!sk) |
1883 | goto response; | |
1884 | ||
fd1278d7 | 1885 | write_lock_bh(&list->lock); |
1da177e4 LT |
1886 | |
1887 | /* Check if we already have channel with that dcid */ | |
1888 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 1889 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1890 | sock_set_flag(sk, SOCK_ZAPPED); |
1891 | l2cap_sock_kill(sk); | |
1892 | goto response; | |
1893 | } | |
1894 | ||
1895 | hci_conn_hold(conn->hcon); | |
1896 | ||
1897 | l2cap_sock_init(sk, parent); | |
1898 | bacpy(&bt_sk(sk)->src, conn->src); | |
1899 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
1900 | l2cap_pi(sk)->psm = psm; | |
1901 | l2cap_pi(sk)->dcid = scid; | |
1902 | ||
1903 | __l2cap_chan_add(conn, sk, parent); | |
1904 | dcid = l2cap_pi(sk)->scid; | |
1905 | ||
1906 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1907 | ||
1da177e4 LT |
1908 | l2cap_pi(sk)->ident = cmd->ident; |
1909 | ||
984947dc | 1910 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
2af6b9d5 | 1911 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
1912 | if (bt_sk(sk)->defer_setup) { |
1913 | sk->sk_state = BT_CONNECT2; | |
1914 | result = L2CAP_CR_PEND; | |
1915 | status = L2CAP_CS_AUTHOR_PEND; | |
1916 | parent->sk_data_ready(parent, 0); | |
1917 | } else { | |
1918 | sk->sk_state = BT_CONFIG; | |
1919 | result = L2CAP_CR_SUCCESS; | |
1920 | status = L2CAP_CS_NO_INFO; | |
1921 | } | |
79d554a6 MH |
1922 | } else { |
1923 | sk->sk_state = BT_CONNECT2; | |
1924 | result = L2CAP_CR_PEND; | |
1925 | status = L2CAP_CS_AUTHEN_PEND; | |
1926 | } | |
1927 | } else { | |
1928 | sk->sk_state = BT_CONNECT2; | |
1929 | result = L2CAP_CR_PEND; | |
1930 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
1931 | } |
1932 | ||
fd1278d7 | 1933 | write_unlock_bh(&list->lock); |
1da177e4 LT |
1934 | |
1935 | response: | |
1936 | bh_unlock_sock(parent); | |
1937 | ||
1938 | sendresp: | |
aca3192c YH |
1939 | rsp.scid = cpu_to_le16(scid); |
1940 | rsp.dcid = cpu_to_le16(dcid); | |
1941 | rsp.result = cpu_to_le16(result); | |
1942 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 1943 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
1944 | |
1945 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
1946 | struct l2cap_info_req info; | |
1947 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
1948 | ||
1949 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
1950 | conn->info_ident = l2cap_get_ident(conn); | |
1951 | ||
1952 | mod_timer(&conn->info_timer, jiffies + | |
1953 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
1954 | ||
1955 | l2cap_send_cmd(conn, conn->info_ident, | |
1956 | L2CAP_INFO_REQ, sizeof(info), &info); | |
1957 | } | |
1958 | ||
1da177e4 LT |
1959 | return 0; |
1960 | } | |
1961 | ||
1962 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
1963 | { | |
1964 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
1965 | u16 scid, dcid, result, status; | |
1966 | struct sock *sk; | |
1967 | u8 req[128]; | |
1968 | ||
1969 | scid = __le16_to_cpu(rsp->scid); | |
1970 | dcid = __le16_to_cpu(rsp->dcid); | |
1971 | result = __le16_to_cpu(rsp->result); | |
1972 | status = __le16_to_cpu(rsp->status); | |
1973 | ||
1974 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
1975 | ||
1976 | if (scid) { | |
af05b30b GP |
1977 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
1978 | if (!sk) | |
1da177e4 LT |
1979 | return 0; |
1980 | } else { | |
af05b30b GP |
1981 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
1982 | if (!sk) | |
1da177e4 LT |
1983 | return 0; |
1984 | } | |
1985 | ||
1986 | switch (result) { | |
1987 | case L2CAP_CR_SUCCESS: | |
1988 | sk->sk_state = BT_CONFIG; | |
1989 | l2cap_pi(sk)->ident = 0; | |
1990 | l2cap_pi(sk)->dcid = dcid; | |
1991 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
1992 | ||
6a8d3010 MH |
1993 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
1994 | ||
1da177e4 LT |
1995 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
1996 | l2cap_build_conf_req(sk, req), req); | |
1997 | break; | |
1998 | ||
1999 | case L2CAP_CR_PEND: | |
6a8d3010 | 2000 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 LT |
2001 | break; |
2002 | ||
2003 | default: | |
2004 | l2cap_chan_del(sk, ECONNREFUSED); | |
2005 | break; | |
2006 | } | |
2007 | ||
2008 | bh_unlock_sock(sk); | |
2009 | return 0; | |
2010 | } | |
2011 | ||
88219a0f | 2012 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
2013 | { |
2014 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
2015 | u16 dcid, flags; | |
2016 | u8 rsp[64]; | |
2017 | struct sock *sk; | |
5dee9e7c | 2018 | int len; |
1da177e4 LT |
2019 | |
2020 | dcid = __le16_to_cpu(req->dcid); | |
2021 | flags = __le16_to_cpu(req->flags); | |
2022 | ||
2023 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
2024 | ||
af05b30b GP |
2025 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
2026 | if (!sk) | |
1da177e4 LT |
2027 | return -ENOENT; |
2028 | ||
354f60a9 MH |
2029 | if (sk->sk_state == BT_DISCONN) |
2030 | goto unlock; | |
2031 | ||
5dee9e7c | 2032 | /* Reject if config buffer is too small. */ |
88219a0f | 2033 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
2034 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
2035 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
2036 | l2cap_build_conf_rsp(sk, rsp, | |
2037 | L2CAP_CONF_REJECT, flags), rsp); | |
2038 | goto unlock; | |
2039 | } | |
2040 | ||
2041 | /* Store config. */ | |
2042 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
2043 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
2044 | |
2045 | if (flags & 0x0001) { | |
2046 | /* Incomplete config. Send empty response. */ | |
2047 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
2048 | l2cap_build_conf_rsp(sk, rsp, |
2049 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
2050 | goto unlock; |
2051 | } | |
2052 | ||
2053 | /* Complete config. */ | |
5dee9e7c MH |
2054 | len = l2cap_parse_conf_req(sk, rsp); |
2055 | if (len < 0) | |
1da177e4 LT |
2056 | goto unlock; |
2057 | ||
5dee9e7c MH |
2058 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
2059 | ||
5dee9e7c MH |
2060 | /* Reset config buffer. */ |
2061 | l2cap_pi(sk)->conf_len = 0; | |
2062 | ||
876d9484 MH |
2063 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
2064 | goto unlock; | |
2065 | ||
1da177e4 LT |
2066 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
2067 | sk->sk_state = BT_CONNECTED; | |
2068 | l2cap_chan_ready(sk); | |
876d9484 MH |
2069 | goto unlock; |
2070 | } | |
2071 | ||
2072 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 2073 | u8 buf[64]; |
1da177e4 | 2074 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 2075 | l2cap_build_conf_req(sk, buf), buf); |
1da177e4 LT |
2076 | } |
2077 | ||
2078 | unlock: | |
2079 | bh_unlock_sock(sk); | |
2080 | return 0; | |
2081 | } | |
2082 | ||
2083 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2084 | { | |
2085 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
2086 | u16 scid, flags, result; | |
2087 | struct sock *sk; | |
2088 | ||
2089 | scid = __le16_to_cpu(rsp->scid); | |
2090 | flags = __le16_to_cpu(rsp->flags); | |
2091 | result = __le16_to_cpu(rsp->result); | |
2092 | ||
af05b30b GP |
2093 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
2094 | scid, flags, result); | |
1da177e4 | 2095 | |
af05b30b GP |
2096 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2097 | if (!sk) | |
1da177e4 LT |
2098 | return 0; |
2099 | ||
2100 | switch (result) { | |
2101 | case L2CAP_CONF_SUCCESS: | |
2102 | break; | |
2103 | ||
2104 | case L2CAP_CONF_UNACCEPT: | |
2105 | if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) { | |
2106 | char req[128]; | |
2107 | /* It does not make sense to adjust L2CAP parameters | |
2108 | * that are currently defined in the spec. We simply | |
2109 | * resend config request that we sent earlier. It is | |
2110 | * stupid, but it helps qualification testing which | |
2111 | * expects at least some response from us. */ | |
2112 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
2113 | l2cap_build_conf_req(sk, req), req); | |
2114 | goto done; | |
2115 | } | |
2116 | ||
8e87d142 | 2117 | default: |
1da177e4 | 2118 | sk->sk_state = BT_DISCONN; |
b1235d79 | 2119 | sk->sk_err = ECONNRESET; |
1da177e4 LT |
2120 | l2cap_sock_set_timer(sk, HZ * 5); |
2121 | { | |
2122 | struct l2cap_disconn_req req; | |
aca3192c YH |
2123 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
2124 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1da177e4 LT |
2125 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
2126 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
2127 | } | |
2128 | goto done; | |
2129 | } | |
2130 | ||
2131 | if (flags & 0x01) | |
2132 | goto done; | |
2133 | ||
1da177e4 LT |
2134 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
2135 | ||
2136 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
2137 | sk->sk_state = BT_CONNECTED; | |
2138 | l2cap_chan_ready(sk); | |
2139 | } | |
2140 | ||
2141 | done: | |
2142 | bh_unlock_sock(sk); | |
2143 | return 0; | |
2144 | } | |
2145 | ||
2146 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2147 | { | |
2148 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
2149 | struct l2cap_disconn_rsp rsp; | |
2150 | u16 dcid, scid; | |
2151 | struct sock *sk; | |
2152 | ||
2153 | scid = __le16_to_cpu(req->scid); | |
2154 | dcid = __le16_to_cpu(req->dcid); | |
2155 | ||
2156 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
2157 | ||
af05b30b GP |
2158 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
2159 | if (!sk) | |
1da177e4 LT |
2160 | return 0; |
2161 | ||
aca3192c YH |
2162 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
2163 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
2164 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
2165 | ||
2166 | sk->sk_shutdown = SHUTDOWN_MASK; | |
2167 | ||
2168 | l2cap_chan_del(sk, ECONNRESET); | |
2169 | bh_unlock_sock(sk); | |
2170 | ||
2171 | l2cap_sock_kill(sk); | |
2172 | return 0; | |
2173 | } | |
2174 | ||
2175 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2176 | { | |
2177 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
2178 | u16 dcid, scid; | |
2179 | struct sock *sk; | |
2180 | ||
2181 | scid = __le16_to_cpu(rsp->scid); | |
2182 | dcid = __le16_to_cpu(rsp->dcid); | |
2183 | ||
2184 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
2185 | ||
af05b30b GP |
2186 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2187 | if (!sk) | |
1da177e4 LT |
2188 | return 0; |
2189 | ||
2190 | l2cap_chan_del(sk, 0); | |
2191 | bh_unlock_sock(sk); | |
2192 | ||
2193 | l2cap_sock_kill(sk); | |
2194 | return 0; | |
2195 | } | |
2196 | ||
2197 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2198 | { | |
2199 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
2200 | u16 type; |
2201 | ||
2202 | type = __le16_to_cpu(req->type); | |
2203 | ||
2204 | BT_DBG("type 0x%4.4x", type); | |
2205 | ||
f0709e03 MH |
2206 | if (type == L2CAP_IT_FEAT_MASK) { |
2207 | u8 buf[8]; | |
2208 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
2209 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2210 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
2211 | put_unaligned(cpu_to_le32(l2cap_feat_mask), (__le32 *) rsp->data); | |
2212 | l2cap_send_cmd(conn, cmd->ident, | |
2213 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
e1027a7c MH |
2214 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
2215 | u8 buf[12]; | |
2216 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
2217 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
2218 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
2219 | memcpy(buf + 4, l2cap_fixed_chan, 8); | |
2220 | l2cap_send_cmd(conn, cmd->ident, | |
2221 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
f0709e03 MH |
2222 | } else { |
2223 | struct l2cap_info_rsp rsp; | |
2224 | rsp.type = cpu_to_le16(type); | |
2225 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
2226 | l2cap_send_cmd(conn, cmd->ident, | |
2227 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
2228 | } | |
1da177e4 LT |
2229 | |
2230 | return 0; | |
2231 | } | |
2232 | ||
2233 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2234 | { | |
2235 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
2236 | u16 type, result; | |
2237 | ||
2238 | type = __le16_to_cpu(rsp->type); | |
2239 | result = __le16_to_cpu(rsp->result); | |
2240 | ||
2241 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
2242 | ||
4e8402a3 MH |
2243 | del_timer(&conn->info_timer); |
2244 | ||
984947dc | 2245 | if (type == L2CAP_IT_FEAT_MASK) { |
83985319 | 2246 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 | 2247 | |
47ec1dcd | 2248 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
e1027a7c MH |
2249 | struct l2cap_info_req req; |
2250 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
2251 | ||
2252 | conn->info_ident = l2cap_get_ident(conn); | |
2253 | ||
2254 | l2cap_send_cmd(conn, conn->info_ident, | |
2255 | L2CAP_INFO_REQ, sizeof(req), &req); | |
2256 | } else { | |
2257 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
2258 | conn->info_ident = 0; | |
2259 | ||
2260 | l2cap_conn_start(conn); | |
2261 | } | |
2262 | } else if (type == L2CAP_IT_FIXED_CHAN) { | |
984947dc | 2263 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 2264 | conn->info_ident = 0; |
984947dc MH |
2265 | |
2266 | l2cap_conn_start(conn); | |
2267 | } | |
4e8402a3 | 2268 | |
1da177e4 LT |
2269 | return 0; |
2270 | } | |
2271 | ||
2272 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
2273 | { | |
2274 | u8 *data = skb->data; | |
2275 | int len = skb->len; | |
2276 | struct l2cap_cmd_hdr cmd; | |
2277 | int err = 0; | |
2278 | ||
2279 | l2cap_raw_recv(conn, skb); | |
2280 | ||
2281 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 2282 | u16 cmd_len; |
1da177e4 LT |
2283 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
2284 | data += L2CAP_CMD_HDR_SIZE; | |
2285 | len -= L2CAP_CMD_HDR_SIZE; | |
2286 | ||
88219a0f | 2287 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 2288 | |
88219a0f | 2289 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 2290 | |
88219a0f | 2291 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
2292 | BT_DBG("corrupted command"); |
2293 | break; | |
2294 | } | |
2295 | ||
2296 | switch (cmd.code) { | |
2297 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 2298 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
2299 | break; |
2300 | ||
2301 | case L2CAP_CONN_REQ: | |
2302 | err = l2cap_connect_req(conn, &cmd, data); | |
2303 | break; | |
2304 | ||
2305 | case L2CAP_CONN_RSP: | |
2306 | err = l2cap_connect_rsp(conn, &cmd, data); | |
2307 | break; | |
2308 | ||
2309 | case L2CAP_CONF_REQ: | |
88219a0f | 2310 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
2311 | break; |
2312 | ||
2313 | case L2CAP_CONF_RSP: | |
2314 | err = l2cap_config_rsp(conn, &cmd, data); | |
2315 | break; | |
2316 | ||
2317 | case L2CAP_DISCONN_REQ: | |
2318 | err = l2cap_disconnect_req(conn, &cmd, data); | |
2319 | break; | |
2320 | ||
2321 | case L2CAP_DISCONN_RSP: | |
2322 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
2323 | break; | |
2324 | ||
2325 | case L2CAP_ECHO_REQ: | |
88219a0f | 2326 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
2327 | break; |
2328 | ||
2329 | case L2CAP_ECHO_RSP: | |
2330 | break; | |
2331 | ||
2332 | case L2CAP_INFO_REQ: | |
2333 | err = l2cap_information_req(conn, &cmd, data); | |
2334 | break; | |
2335 | ||
2336 | case L2CAP_INFO_RSP: | |
2337 | err = l2cap_information_rsp(conn, &cmd, data); | |
2338 | break; | |
2339 | ||
2340 | default: | |
2341 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
2342 | err = -EINVAL; | |
2343 | break; | |
2344 | } | |
2345 | ||
2346 | if (err) { | |
2347 | struct l2cap_cmd_rej rej; | |
2348 | BT_DBG("error %d", err); | |
2349 | ||
2350 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 2351 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
2352 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
2353 | } | |
2354 | ||
88219a0f AV |
2355 | data += cmd_len; |
2356 | len -= cmd_len; | |
1da177e4 LT |
2357 | } |
2358 | ||
2359 | kfree_skb(skb); | |
2360 | } | |
2361 | ||
2362 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) | |
2363 | { | |
2364 | struct sock *sk; | |
2365 | ||
2366 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
2367 | if (!sk) { | |
2368 | BT_DBG("unknown cid 0x%4.4x", cid); | |
2369 | goto drop; | |
2370 | } | |
2371 | ||
2372 | BT_DBG("sk %p, len %d", sk, skb->len); | |
2373 | ||
2374 | if (sk->sk_state != BT_CONNECTED) | |
2375 | goto drop; | |
2376 | ||
2377 | if (l2cap_pi(sk)->imtu < skb->len) | |
2378 | goto drop; | |
2379 | ||
2380 | /* If socket recv buffers overflows we drop data here | |
2381 | * which is *bad* because L2CAP has to be reliable. | |
2382 | * But we don't have any other choice. L2CAP doesn't | |
2383 | * provide flow control mechanism. */ | |
2384 | ||
2385 | if (!sock_queue_rcv_skb(sk, skb)) | |
2386 | goto done; | |
2387 | ||
2388 | drop: | |
2389 | kfree_skb(skb); | |
2390 | ||
2391 | done: | |
0139418c MH |
2392 | if (sk) |
2393 | bh_unlock_sock(sk); | |
2394 | ||
1da177e4 LT |
2395 | return 0; |
2396 | } | |
2397 | ||
8e036fc3 | 2398 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
2399 | { |
2400 | struct sock *sk; | |
2401 | ||
2402 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
2403 | if (!sk) | |
2404 | goto drop; | |
2405 | ||
2406 | BT_DBG("sk %p, len %d", sk, skb->len); | |
2407 | ||
2408 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
2409 | goto drop; | |
2410 | ||
2411 | if (l2cap_pi(sk)->imtu < skb->len) | |
2412 | goto drop; | |
2413 | ||
2414 | if (!sock_queue_rcv_skb(sk, skb)) | |
2415 | goto done; | |
2416 | ||
2417 | drop: | |
2418 | kfree_skb(skb); | |
2419 | ||
2420 | done: | |
af05b30b GP |
2421 | if (sk) |
2422 | bh_unlock_sock(sk); | |
1da177e4 LT |
2423 | return 0; |
2424 | } | |
2425 | ||
2426 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
2427 | { | |
2428 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
2429 | u16 cid, len; |
2430 | __le16 psm; | |
1da177e4 LT |
2431 | |
2432 | skb_pull(skb, L2CAP_HDR_SIZE); | |
2433 | cid = __le16_to_cpu(lh->cid); | |
2434 | len = __le16_to_cpu(lh->len); | |
2435 | ||
2436 | BT_DBG("len %d, cid 0x%4.4x", len, cid); | |
2437 | ||
2438 | switch (cid) { | |
8db4dc46 | 2439 | case L2CAP_CID_SIGNALING: |
1da177e4 LT |
2440 | l2cap_sig_channel(conn, skb); |
2441 | break; | |
2442 | ||
8db4dc46 | 2443 | case L2CAP_CID_CONN_LESS: |
8e036fc3 | 2444 | psm = get_unaligned((__le16 *) skb->data); |
1da177e4 LT |
2445 | skb_pull(skb, 2); |
2446 | l2cap_conless_channel(conn, psm, skb); | |
2447 | break; | |
2448 | ||
2449 | default: | |
2450 | l2cap_data_channel(conn, cid, skb); | |
2451 | break; | |
2452 | } | |
2453 | } | |
2454 | ||
2455 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
2456 | ||
2457 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
2458 | { | |
2459 | int exact = 0, lm1 = 0, lm2 = 0; | |
2460 | register struct sock *sk; | |
2461 | struct hlist_node *node; | |
2462 | ||
2463 | if (type != ACL_LINK) | |
2464 | return 0; | |
2465 | ||
2466 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
2467 | ||
2468 | /* Find listening sockets and check their link_mode */ | |
2469 | read_lock(&l2cap_sk_list.lock); | |
2470 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
2471 | if (sk->sk_state != BT_LISTEN) | |
2472 | continue; | |
2473 | ||
2474 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
2475 | lm1 |= HCI_LM_ACCEPT; |
2476 | if (l2cap_pi(sk)->role_switch) | |
2477 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 2478 | exact++; |
2af6b9d5 MH |
2479 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
2480 | lm2 |= HCI_LM_ACCEPT; | |
2481 | if (l2cap_pi(sk)->role_switch) | |
2482 | lm2 |= HCI_LM_MASTER; | |
2483 | } | |
1da177e4 LT |
2484 | } |
2485 | read_unlock(&l2cap_sk_list.lock); | |
2486 | ||
2487 | return exact ? lm1 : lm2; | |
2488 | } | |
2489 | ||
2490 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
2491 | { | |
0139418c MH |
2492 | struct l2cap_conn *conn; |
2493 | ||
1da177e4 LT |
2494 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
2495 | ||
2496 | if (hcon->type != ACL_LINK) | |
2497 | return 0; | |
2498 | ||
2499 | if (!status) { | |
1da177e4 LT |
2500 | conn = l2cap_conn_add(hcon, status); |
2501 | if (conn) | |
2502 | l2cap_conn_ready(conn); | |
0139418c | 2503 | } else |
1da177e4 LT |
2504 | l2cap_conn_del(hcon, bt_err(status)); |
2505 | ||
2506 | return 0; | |
2507 | } | |
2508 | ||
2950f21a MH |
2509 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
2510 | { | |
2511 | struct l2cap_conn *conn = hcon->l2cap_data; | |
2512 | ||
2513 | BT_DBG("hcon %p", hcon); | |
2514 | ||
2515 | if (hcon->type != ACL_LINK || !conn) | |
2516 | return 0x13; | |
2517 | ||
2518 | return conn->disc_reason; | |
2519 | } | |
2520 | ||
2521 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) | |
1da177e4 LT |
2522 | { |
2523 | BT_DBG("hcon %p reason %d", hcon, reason); | |
2524 | ||
2525 | if (hcon->type != ACL_LINK) | |
2526 | return 0; | |
2527 | ||
2528 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 2529 | |
1da177e4 LT |
2530 | return 0; |
2531 | } | |
2532 | ||
f62e4323 MH |
2533 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
2534 | { | |
255c7601 MH |
2535 | if (sk->sk_type != SOCK_SEQPACKET) |
2536 | return; | |
2537 | ||
f62e4323 MH |
2538 | if (encrypt == 0x00) { |
2539 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { | |
2540 | l2cap_sock_clear_timer(sk); | |
2541 | l2cap_sock_set_timer(sk, HZ * 5); | |
2542 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
2543 | __l2cap_sock_close(sk, ECONNREFUSED); | |
2544 | } else { | |
2545 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) | |
2546 | l2cap_sock_clear_timer(sk); | |
2547 | } | |
2548 | } | |
2549 | ||
8c1b2355 | 2550 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
2551 | { |
2552 | struct l2cap_chan_list *l; | |
0139418c | 2553 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 2554 | struct sock *sk; |
1da177e4 | 2555 | |
0139418c | 2556 | if (!conn) |
1da177e4 | 2557 | return 0; |
0139418c | 2558 | |
1da177e4 LT |
2559 | l = &conn->chan_list; |
2560 | ||
2561 | BT_DBG("conn %p", conn); | |
2562 | ||
2563 | read_lock(&l->lock); | |
2564 | ||
2565 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2566 | bh_lock_sock(sk); | |
2567 | ||
6a8d3010 MH |
2568 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
2569 | bh_unlock_sock(sk); | |
2570 | continue; | |
2571 | } | |
2572 | ||
f62e4323 | 2573 | if (!status && (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 2574 | sk->sk_state == BT_CONFIG)) { |
f62e4323 | 2575 | l2cap_check_encryption(sk, encrypt); |
9719f8af MH |
2576 | bh_unlock_sock(sk); |
2577 | continue; | |
2578 | } | |
2579 | ||
b1235d79 MH |
2580 | if (sk->sk_state == BT_CONNECT) { |
2581 | if (!status) { | |
2582 | struct l2cap_conn_req req; | |
2583 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2584 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 2585 | |
b1235d79 | 2586 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
1da177e4 | 2587 | |
b1235d79 MH |
2588 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2589 | L2CAP_CONN_REQ, sizeof(req), &req); | |
2590 | } else { | |
2591 | l2cap_sock_clear_timer(sk); | |
2592 | l2cap_sock_set_timer(sk, HZ / 10); | |
2593 | } | |
2594 | } else if (sk->sk_state == BT_CONNECT2) { | |
2595 | struct l2cap_conn_rsp rsp; | |
2596 | __u16 result; | |
1da177e4 | 2597 | |
b1235d79 MH |
2598 | if (!status) { |
2599 | sk->sk_state = BT_CONFIG; | |
2600 | result = L2CAP_CR_SUCCESS; | |
2601 | } else { | |
2602 | sk->sk_state = BT_DISCONN; | |
2603 | l2cap_sock_set_timer(sk, HZ / 10); | |
2604 | result = L2CAP_CR_SEC_BLOCK; | |
2605 | } | |
2606 | ||
2607 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
2608 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
2609 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 2610 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
2611 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
2612 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
2613 | } | |
1da177e4 LT |
2614 | |
2615 | bh_unlock_sock(sk); | |
2616 | } | |
2617 | ||
2618 | read_unlock(&l->lock); | |
b1235d79 | 2619 | |
1da177e4 LT |
2620 | return 0; |
2621 | } | |
2622 | ||
2623 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
2624 | { | |
2625 | struct l2cap_conn *conn = hcon->l2cap_data; | |
2626 | ||
2627 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
2628 | goto drop; | |
2629 | ||
2630 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
2631 | ||
2632 | if (flags & ACL_START) { | |
2633 | struct l2cap_hdr *hdr; | |
2634 | int len; | |
2635 | ||
2636 | if (conn->rx_len) { | |
2637 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
2638 | kfree_skb(conn->rx_skb); | |
2639 | conn->rx_skb = NULL; | |
2640 | conn->rx_len = 0; | |
2641 | l2cap_conn_unreliable(conn, ECOMM); | |
2642 | } | |
2643 | ||
2644 | if (skb->len < 2) { | |
2645 | BT_ERR("Frame is too short (len %d)", skb->len); | |
2646 | l2cap_conn_unreliable(conn, ECOMM); | |
2647 | goto drop; | |
2648 | } | |
2649 | ||
2650 | hdr = (struct l2cap_hdr *) skb->data; | |
2651 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
2652 | ||
2653 | if (len == skb->len) { | |
2654 | /* Complete frame received */ | |
2655 | l2cap_recv_frame(conn, skb); | |
2656 | return 0; | |
2657 | } | |
2658 | ||
2659 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
2660 | ||
2661 | if (skb->len > len) { | |
2662 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
2663 | skb->len, len); | |
2664 | l2cap_conn_unreliable(conn, ECOMM); | |
2665 | goto drop; | |
2666 | } | |
2667 | ||
2668 | /* Allocate skb for the complete frame (with header) */ | |
af05b30b GP |
2669 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
2670 | if (!conn->rx_skb) | |
1da177e4 LT |
2671 | goto drop; |
2672 | ||
d626f62b | 2673 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 2674 | skb->len); |
1da177e4 LT |
2675 | conn->rx_len = len - skb->len; |
2676 | } else { | |
2677 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
2678 | ||
2679 | if (!conn->rx_len) { | |
2680 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
2681 | l2cap_conn_unreliable(conn, ECOMM); | |
2682 | goto drop; | |
2683 | } | |
2684 | ||
2685 | if (skb->len > conn->rx_len) { | |
2686 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
2687 | skb->len, conn->rx_len); | |
2688 | kfree_skb(conn->rx_skb); | |
2689 | conn->rx_skb = NULL; | |
2690 | conn->rx_len = 0; | |
2691 | l2cap_conn_unreliable(conn, ECOMM); | |
2692 | goto drop; | |
2693 | } | |
2694 | ||
d626f62b | 2695 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 2696 | skb->len); |
1da177e4 LT |
2697 | conn->rx_len -= skb->len; |
2698 | ||
2699 | if (!conn->rx_len) { | |
2700 | /* Complete frame received */ | |
2701 | l2cap_recv_frame(conn, conn->rx_skb); | |
2702 | conn->rx_skb = NULL; | |
2703 | } | |
2704 | } | |
2705 | ||
2706 | drop: | |
2707 | kfree_skb(skb); | |
2708 | return 0; | |
2709 | } | |
2710 | ||
be9d1227 | 2711 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
2712 | { |
2713 | struct sock *sk; | |
2714 | struct hlist_node *node; | |
be9d1227 | 2715 | char *str = buf; |
1da177e4 LT |
2716 | |
2717 | read_lock_bh(&l2cap_sk_list.lock); | |
2718 | ||
be9d1227 MH |
2719 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
2720 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1da177e4 | 2721 | |
2af6b9d5 | 2722 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
be9d1227 | 2723 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), |
b4324b5d MH |
2724 | sk->sk_state, __le16_to_cpu(pi->psm), pi->scid, |
2725 | pi->dcid, pi->imtu, pi->omtu, pi->sec_level); | |
be9d1227 | 2726 | } |
1da177e4 | 2727 | |
1da177e4 | 2728 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 2729 | |
af05b30b | 2730 | return str - buf; |
1da177e4 LT |
2731 | } |
2732 | ||
be9d1227 | 2733 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
1da177e4 | 2734 | |
90ddc4f0 | 2735 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
2736 | .family = PF_BLUETOOTH, |
2737 | .owner = THIS_MODULE, | |
2738 | .release = l2cap_sock_release, | |
2739 | .bind = l2cap_sock_bind, | |
2740 | .connect = l2cap_sock_connect, | |
2741 | .listen = l2cap_sock_listen, | |
2742 | .accept = l2cap_sock_accept, | |
2743 | .getname = l2cap_sock_getname, | |
2744 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 2745 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 2746 | .poll = bt_sock_poll, |
3241ad82 | 2747 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
2748 | .mmap = sock_no_mmap, |
2749 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
2750 | .shutdown = l2cap_sock_shutdown, |
2751 | .setsockopt = l2cap_sock_setsockopt, | |
2752 | .getsockopt = l2cap_sock_getsockopt | |
2753 | }; | |
2754 | ||
2755 | static struct net_proto_family l2cap_sock_family_ops = { | |
2756 | .family = PF_BLUETOOTH, | |
2757 | .owner = THIS_MODULE, | |
2758 | .create = l2cap_sock_create, | |
2759 | }; | |
2760 | ||
2761 | static struct hci_proto l2cap_hci_proto = { | |
2762 | .name = "L2CAP", | |
2763 | .id = HCI_PROTO_L2CAP, | |
2764 | .connect_ind = l2cap_connect_ind, | |
2765 | .connect_cfm = l2cap_connect_cfm, | |
2766 | .disconn_ind = l2cap_disconn_ind, | |
2950f21a | 2767 | .disconn_cfm = l2cap_disconn_cfm, |
8c1b2355 | 2768 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
2769 | .recv_acldata = l2cap_recv_acldata |
2770 | }; | |
2771 | ||
2772 | static int __init l2cap_init(void) | |
2773 | { | |
2774 | int err; | |
be9d1227 | 2775 | |
1da177e4 LT |
2776 | err = proto_register(&l2cap_proto, 0); |
2777 | if (err < 0) | |
2778 | return err; | |
2779 | ||
2780 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
2781 | if (err < 0) { | |
2782 | BT_ERR("L2CAP socket registration failed"); | |
2783 | goto error; | |
2784 | } | |
2785 | ||
2786 | err = hci_register_proto(&l2cap_hci_proto); | |
2787 | if (err < 0) { | |
2788 | BT_ERR("L2CAP protocol registration failed"); | |
2789 | bt_sock_unregister(BTPROTO_L2CAP); | |
2790 | goto error; | |
2791 | } | |
2792 | ||
df5c37ea MH |
2793 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
2794 | BT_ERR("Failed to create L2CAP info file"); | |
1da177e4 LT |
2795 | |
2796 | BT_INFO("L2CAP ver %s", VERSION); | |
2797 | BT_INFO("L2CAP socket layer initialized"); | |
2798 | ||
2799 | return 0; | |
2800 | ||
2801 | error: | |
2802 | proto_unregister(&l2cap_proto); | |
2803 | return err; | |
2804 | } | |
2805 | ||
2806 | static void __exit l2cap_exit(void) | |
2807 | { | |
a91f2e39 | 2808 | class_remove_file(bt_class, &class_attr_l2cap); |
1da177e4 LT |
2809 | |
2810 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
2811 | BT_ERR("L2CAP socket unregistration failed"); | |
2812 | ||
2813 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
2814 | BT_ERR("L2CAP protocol unregistration failed"); | |
2815 | ||
2816 | proto_unregister(&l2cap_proto); | |
2817 | } | |
2818 | ||
2819 | void l2cap_load(void) | |
2820 | { | |
2821 | /* Dummy function to trigger automatic L2CAP module loading by | |
2822 | * other modules that use L2CAP sockets but don't use any other | |
2823 | * symbols from it. */ | |
2824 | return; | |
2825 | } | |
2826 | EXPORT_SYMBOL(l2cap_load); | |
2827 | ||
2828 | module_init(l2cap_init); | |
2829 | module_exit(l2cap_exit); | |
2830 | ||
63fbd24e | 2831 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
2832 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
2833 | MODULE_VERSION(VERSION); | |
2834 | MODULE_LICENSE("GPL"); | |
2835 | MODULE_ALIAS("bt-proto-0"); |