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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> |
fcc203c3 | 44 | #include <linux/crc16.h> |
1da177e4 LT |
45 | #include <net/sock.h> |
46 | ||
47 | #include <asm/system.h> | |
1da177e4 LT |
48 | #include <asm/unaligned.h> |
49 | ||
50 | #include <net/bluetooth/bluetooth.h> | |
51 | #include <net/bluetooth/hci_core.h> | |
52 | #include <net/bluetooth/l2cap.h> | |
53 | ||
44dd46de MH |
54 | #define VERSION "2.14" |
55 | ||
56 | static int enable_ertm = 0; | |
f0709e03 | 57 | |
47ec1dcd | 58 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
e1027a7c | 59 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
1da177e4 | 60 | |
90ddc4f0 | 61 | static const struct proto_ops l2cap_sock_ops; |
1da177e4 LT |
62 | |
63 | static struct bt_sock_list l2cap_sk_list = { | |
d5fb2962 | 64 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
1da177e4 LT |
65 | }; |
66 | ||
1da177e4 LT |
67 | static void __l2cap_sock_close(struct sock *sk, int reason); |
68 | static void l2cap_sock_close(struct sock *sk); | |
69 | static void l2cap_sock_kill(struct sock *sk); | |
70 | ||
71 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
72 | u8 code, u8 ident, u16 dlen, void *data); | |
73 | ||
74 | /* ---- L2CAP timers ---- */ | |
75 | static void l2cap_sock_timeout(unsigned long arg) | |
76 | { | |
77 | struct sock *sk = (struct sock *) arg; | |
b1235d79 | 78 | int reason; |
1da177e4 LT |
79 | |
80 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
81 | ||
82 | bh_lock_sock(sk); | |
b1235d79 | 83 | |
f62e4323 MH |
84 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
85 | reason = ECONNREFUSED; | |
86 | else if (sk->sk_state == BT_CONNECT && | |
2af6b9d5 | 87 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
b1235d79 MH |
88 | reason = ECONNREFUSED; |
89 | else | |
90 | reason = ETIMEDOUT; | |
91 | ||
92 | __l2cap_sock_close(sk, reason); | |
93 | ||
1da177e4 LT |
94 | bh_unlock_sock(sk); |
95 | ||
96 | l2cap_sock_kill(sk); | |
97 | sock_put(sk); | |
98 | } | |
99 | ||
100 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
101 | { | |
102 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
103 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
104 | } | |
105 | ||
106 | static void l2cap_sock_clear_timer(struct sock *sk) | |
107 | { | |
108 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
109 | sk_stop_timer(sk, &sk->sk_timer); | |
110 | } | |
111 | ||
0139418c MH |
112 | /* ---- L2CAP channels ---- */ |
113 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
114 | { | |
115 | struct sock *s; | |
116 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
117 | if (l2cap_pi(s)->dcid == cid) | |
118 | break; | |
119 | } | |
120 | return s; | |
121 | } | |
122 | ||
123 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
124 | { | |
125 | struct sock *s; | |
126 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
127 | if (l2cap_pi(s)->scid == cid) | |
128 | break; | |
129 | } | |
130 | return s; | |
131 | } | |
132 | ||
133 | /* Find channel with given SCID. | |
134 | * Returns locked socket */ | |
135 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
136 | { | |
137 | struct sock *s; | |
138 | read_lock(&l->lock); | |
139 | s = __l2cap_get_chan_by_scid(l, cid); | |
af05b30b GP |
140 | if (s) |
141 | bh_lock_sock(s); | |
0139418c MH |
142 | read_unlock(&l->lock); |
143 | return s; | |
144 | } | |
145 | ||
146 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
147 | { | |
148 | struct sock *s; | |
149 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
150 | if (l2cap_pi(s)->ident == ident) | |
151 | break; | |
152 | } | |
153 | return s; | |
154 | } | |
155 | ||
156 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
157 | { | |
158 | struct sock *s; | |
159 | read_lock(&l->lock); | |
160 | s = __l2cap_get_chan_by_ident(l, ident); | |
af05b30b GP |
161 | if (s) |
162 | bh_lock_sock(s); | |
0139418c MH |
163 | read_unlock(&l->lock); |
164 | return s; | |
165 | } | |
166 | ||
167 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
168 | { | |
8db4dc46 | 169 | u16 cid = L2CAP_CID_DYN_START; |
0139418c | 170 | |
8db4dc46 | 171 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
af05b30b | 172 | if (!__l2cap_get_chan_by_scid(l, cid)) |
0139418c MH |
173 | return cid; |
174 | } | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
180 | { | |
181 | sock_hold(sk); | |
182 | ||
183 | if (l->head) | |
184 | l2cap_pi(l->head)->prev_c = sk; | |
185 | ||
186 | l2cap_pi(sk)->next_c = l->head; | |
187 | l2cap_pi(sk)->prev_c = NULL; | |
188 | l->head = sk; | |
189 | } | |
190 | ||
191 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
192 | { | |
193 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
194 | ||
fd1278d7 | 195 | write_lock_bh(&l->lock); |
0139418c MH |
196 | if (sk == l->head) |
197 | l->head = next; | |
198 | ||
199 | if (next) | |
200 | l2cap_pi(next)->prev_c = prev; | |
201 | if (prev) | |
202 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 203 | write_unlock_bh(&l->lock); |
0139418c MH |
204 | |
205 | __sock_put(sk); | |
206 | } | |
207 | ||
208 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
209 | { | |
210 | struct l2cap_chan_list *l = &conn->chan_list; | |
211 | ||
af05b30b GP |
212 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
213 | l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
0139418c | 214 | |
2950f21a MH |
215 | conn->disc_reason = 0x13; |
216 | ||
0139418c MH |
217 | l2cap_pi(sk)->conn = conn; |
218 | ||
219 | if (sk->sk_type == SOCK_SEQPACKET) { | |
220 | /* Alloc CID for connection-oriented socket */ | |
221 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
222 | } else if (sk->sk_type == SOCK_DGRAM) { | |
223 | /* Connectionless socket */ | |
8db4dc46 GP |
224 | l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS; |
225 | l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS; | |
0139418c MH |
226 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
227 | } else { | |
228 | /* Raw socket can send/recv signalling messages only */ | |
8db4dc46 GP |
229 | l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING; |
230 | l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING; | |
0139418c MH |
231 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
232 | } | |
233 | ||
234 | __l2cap_chan_link(l, sk); | |
235 | ||
236 | if (parent) | |
237 | bt_accept_enqueue(parent, sk); | |
238 | } | |
239 | ||
8e87d142 | 240 | /* Delete channel. |
0139418c MH |
241 | * Must be called on the locked socket. */ |
242 | static void l2cap_chan_del(struct sock *sk, int err) | |
243 | { | |
244 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
245 | struct sock *parent = bt_sk(sk)->parent; | |
246 | ||
247 | l2cap_sock_clear_timer(sk); | |
248 | ||
249 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
250 | ||
8e87d142 | 251 | if (conn) { |
0139418c MH |
252 | /* Unlink from channel list */ |
253 | l2cap_chan_unlink(&conn->chan_list, sk); | |
254 | l2cap_pi(sk)->conn = NULL; | |
255 | hci_conn_put(conn->hcon); | |
256 | } | |
257 | ||
b1235d79 | 258 | sk->sk_state = BT_CLOSED; |
0139418c MH |
259 | sock_set_flag(sk, SOCK_ZAPPED); |
260 | ||
261 | if (err) | |
262 | sk->sk_err = err; | |
263 | ||
264 | if (parent) { | |
265 | bt_accept_unlink(sk); | |
266 | parent->sk_data_ready(parent, 0); | |
267 | } else | |
268 | sk->sk_state_change(sk); | |
269 | } | |
270 | ||
79d554a6 | 271 | /* Service level security */ |
2af6b9d5 | 272 | static inline int l2cap_check_security(struct sock *sk) |
79d554a6 MH |
273 | { |
274 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
0684e5f9 MH |
275 | __u8 auth_type; |
276 | ||
00ae4af9 MH |
277 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
278 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
279 | auth_type = HCI_AT_NO_BONDING_MITM; | |
280 | else | |
af05b30b | 281 | auth_type = HCI_AT_NO_BONDING; |
00ae4af9 MH |
282 | |
283 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
284 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
285 | } else { | |
286 | switch (l2cap_pi(sk)->sec_level) { | |
287 | case BT_SECURITY_HIGH: | |
288 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
289 | break; | |
290 | case BT_SECURITY_MEDIUM: | |
291 | auth_type = HCI_AT_GENERAL_BONDING; | |
292 | break; | |
293 | default: | |
294 | auth_type = HCI_AT_NO_BONDING; | |
295 | break; | |
296 | } | |
0684e5f9 | 297 | } |
79d554a6 | 298 | |
0684e5f9 MH |
299 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
300 | auth_type); | |
79d554a6 MH |
301 | } |
302 | ||
4e8402a3 MH |
303 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
304 | { | |
305 | u8 id; | |
306 | ||
307 | /* Get next available identificator. | |
308 | * 1 - 128 are used by kernel. | |
309 | * 129 - 199 are reserved. | |
310 | * 200 - 254 are used by utilities like l2ping, etc. | |
311 | */ | |
312 | ||
313 | spin_lock_bh(&conn->lock); | |
314 | ||
315 | if (++conn->tx_ident > 128) | |
316 | conn->tx_ident = 1; | |
317 | ||
318 | id = conn->tx_ident; | |
319 | ||
320 | spin_unlock_bh(&conn->lock); | |
321 | ||
322 | return id; | |
323 | } | |
324 | ||
325 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) | |
326 | { | |
327 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
328 | ||
329 | BT_DBG("code 0x%2.2x", code); | |
330 | ||
331 | if (!skb) | |
332 | return -ENOMEM; | |
333 | ||
334 | return hci_send_acl(conn->hcon, skb, 0); | |
335 | } | |
336 | ||
1c2acffb GP |
337 | static inline int l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control) |
338 | { | |
339 | struct sk_buff *skb; | |
340 | struct l2cap_hdr *lh; | |
341 | struct l2cap_conn *conn = pi->conn; | |
fcc203c3 GP |
342 | int count, hlen = L2CAP_HDR_SIZE + 2; |
343 | ||
344 | if (pi->fcs == L2CAP_FCS_CRC16) | |
345 | hlen += 2; | |
1c2acffb GP |
346 | |
347 | BT_DBG("pi %p, control 0x%2.2x", pi, control); | |
348 | ||
fcc203c3 | 349 | count = min_t(unsigned int, conn->mtu, hlen); |
1c2acffb GP |
350 | control |= L2CAP_CTRL_FRAME_TYPE; |
351 | ||
352 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
353 | if (!skb) | |
354 | return -ENOMEM; | |
355 | ||
356 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
fcc203c3 | 357 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
1c2acffb GP |
358 | lh->cid = cpu_to_le16(pi->dcid); |
359 | put_unaligned_le16(control, skb_put(skb, 2)); | |
360 | ||
fcc203c3 GP |
361 | if (pi->fcs == L2CAP_FCS_CRC16) { |
362 | u16 fcs = crc16(0, (u8 *)lh, count - 2); | |
363 | put_unaligned_le16(fcs, skb_put(skb, 2)); | |
364 | } | |
365 | ||
1c2acffb GP |
366 | return hci_send_acl(pi->conn->hcon, skb, 0); |
367 | } | |
368 | ||
79d554a6 MH |
369 | static void l2cap_do_start(struct sock *sk) |
370 | { | |
371 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
372 | ||
373 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
984947dc MH |
374 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
375 | return; | |
376 | ||
2af6b9d5 | 377 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
378 | struct l2cap_conn_req req; |
379 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
380 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 381 | |
b1235d79 | 382 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 383 | |
b1235d79 | 384 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 385 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 386 | } |
79d554a6 MH |
387 | } else { |
388 | struct l2cap_info_req req; | |
389 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
390 | ||
391 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
392 | conn->info_ident = l2cap_get_ident(conn); | |
393 | ||
394 | mod_timer(&conn->info_timer, jiffies + | |
395 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
396 | ||
397 | l2cap_send_cmd(conn, conn->info_ident, | |
398 | L2CAP_INFO_REQ, sizeof(req), &req); | |
399 | } | |
400 | } | |
401 | ||
22121fc9 GP |
402 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk) |
403 | { | |
404 | struct l2cap_disconn_req req; | |
405 | ||
406 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
407 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
408 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
409 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
410 | } | |
411 | ||
1da177e4 | 412 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
413 | static void l2cap_conn_start(struct l2cap_conn *conn) |
414 | { | |
415 | struct l2cap_chan_list *l = &conn->chan_list; | |
416 | struct sock *sk; | |
417 | ||
418 | BT_DBG("conn %p", conn); | |
419 | ||
420 | read_lock(&l->lock); | |
421 | ||
422 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
423 | bh_lock_sock(sk); | |
424 | ||
425 | if (sk->sk_type != SOCK_SEQPACKET) { | |
79d554a6 MH |
426 | bh_unlock_sock(sk); |
427 | continue; | |
428 | } | |
429 | ||
430 | if (sk->sk_state == BT_CONNECT) { | |
2af6b9d5 | 431 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
432 | struct l2cap_conn_req req; |
433 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
434 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 435 | |
b1235d79 | 436 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 437 | |
b1235d79 | 438 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4e8402a3 | 439 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 440 | } |
79d554a6 MH |
441 | } else if (sk->sk_state == BT_CONNECT2) { |
442 | struct l2cap_conn_rsp rsp; | |
443 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
444 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
445 | ||
2af6b9d5 | 446 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
447 | if (bt_sk(sk)->defer_setup) { |
448 | struct sock *parent = bt_sk(sk)->parent; | |
449 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
450 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
451 | parent->sk_data_ready(parent, 0); | |
452 | ||
453 | } else { | |
454 | sk->sk_state = BT_CONFIG; | |
455 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
456 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
457 | } | |
79d554a6 MH |
458 | } else { |
459 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
460 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
461 | } | |
462 | ||
463 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
464 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4e8402a3 MH |
465 | } |
466 | ||
467 | bh_unlock_sock(sk); | |
468 | } | |
469 | ||
470 | read_unlock(&l->lock); | |
471 | } | |
472 | ||
473 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
474 | { | |
79d554a6 MH |
475 | struct l2cap_chan_list *l = &conn->chan_list; |
476 | struct sock *sk; | |
4e8402a3 | 477 | |
79d554a6 | 478 | BT_DBG("conn %p", conn); |
4e8402a3 | 479 | |
79d554a6 | 480 | read_lock(&l->lock); |
4e8402a3 | 481 | |
79d554a6 MH |
482 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
483 | bh_lock_sock(sk); | |
4e8402a3 | 484 | |
79d554a6 MH |
485 | if (sk->sk_type != SOCK_SEQPACKET) { |
486 | l2cap_sock_clear_timer(sk); | |
487 | sk->sk_state = BT_CONNECTED; | |
488 | sk->sk_state_change(sk); | |
489 | } else if (sk->sk_state == BT_CONNECT) | |
490 | l2cap_do_start(sk); | |
4e8402a3 | 491 | |
79d554a6 | 492 | bh_unlock_sock(sk); |
4e8402a3 | 493 | } |
79d554a6 MH |
494 | |
495 | read_unlock(&l->lock); | |
4e8402a3 MH |
496 | } |
497 | ||
498 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
499 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
500 | { | |
501 | struct l2cap_chan_list *l = &conn->chan_list; | |
502 | struct sock *sk; | |
503 | ||
504 | BT_DBG("conn %p", conn); | |
505 | ||
506 | read_lock(&l->lock); | |
507 | ||
508 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 509 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
510 | sk->sk_err = err; |
511 | } | |
512 | ||
513 | read_unlock(&l->lock); | |
514 | } | |
515 | ||
516 | static void l2cap_info_timeout(unsigned long arg) | |
517 | { | |
518 | struct l2cap_conn *conn = (void *) arg; | |
519 | ||
984947dc | 520 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 521 | conn->info_ident = 0; |
984947dc | 522 | |
4e8402a3 MH |
523 | l2cap_conn_start(conn); |
524 | } | |
525 | ||
1da177e4 LT |
526 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
527 | { | |
0139418c | 528 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 529 | |
0139418c | 530 | if (conn || status) |
1da177e4 LT |
531 | return conn; |
532 | ||
0139418c MH |
533 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
534 | if (!conn) | |
1da177e4 | 535 | return NULL; |
1da177e4 LT |
536 | |
537 | hcon->l2cap_data = conn; | |
538 | conn->hcon = hcon; | |
539 | ||
0139418c MH |
540 | BT_DBG("hcon %p conn %p", hcon, conn); |
541 | ||
1da177e4 LT |
542 | conn->mtu = hcon->hdev->acl_mtu; |
543 | conn->src = &hcon->hdev->bdaddr; | |
544 | conn->dst = &hcon->dst; | |
545 | ||
4e8402a3 MH |
546 | conn->feat_mask = 0; |
547 | ||
b1235d79 MH |
548 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
549 | (unsigned long) conn); | |
4e8402a3 | 550 | |
1da177e4 LT |
551 | spin_lock_init(&conn->lock); |
552 | rwlock_init(&conn->chan_list.lock); | |
553 | ||
2950f21a MH |
554 | conn->disc_reason = 0x13; |
555 | ||
1da177e4 LT |
556 | return conn; |
557 | } | |
558 | ||
0139418c | 559 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 560 | { |
0139418c | 561 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
562 | struct sock *sk; |
563 | ||
0139418c MH |
564 | if (!conn) |
565 | return; | |
1da177e4 LT |
566 | |
567 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
568 | ||
7585b97a | 569 | kfree_skb(conn->rx_skb); |
1da177e4 LT |
570 | |
571 | /* Kill channels */ | |
572 | while ((sk = conn->chan_list.head)) { | |
573 | bh_lock_sock(sk); | |
574 | l2cap_chan_del(sk, err); | |
575 | bh_unlock_sock(sk); | |
576 | l2cap_sock_kill(sk); | |
577 | } | |
578 | ||
8e8440f5 DY |
579 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
580 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 581 | |
1da177e4 LT |
582 | hcon->l2cap_data = NULL; |
583 | kfree(conn); | |
1da177e4 LT |
584 | } |
585 | ||
586 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
587 | { | |
588 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 589 | write_lock_bh(&l->lock); |
1da177e4 | 590 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 591 | write_unlock_bh(&l->lock); |
1da177e4 LT |
592 | } |
593 | ||
1da177e4 | 594 | /* ---- Socket interface ---- */ |
8e036fc3 | 595 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
596 | { |
597 | struct sock *sk; | |
598 | struct hlist_node *node; | |
599 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
600 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
601 | goto found; | |
602 | sk = NULL; | |
603 | found: | |
604 | return sk; | |
605 | } | |
606 | ||
607 | /* Find socket with psm and source bdaddr. | |
608 | * Returns closest match. | |
609 | */ | |
8e036fc3 | 610 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
611 | { |
612 | struct sock *sk = NULL, *sk1 = NULL; | |
613 | struct hlist_node *node; | |
614 | ||
615 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
616 | if (state && sk->sk_state != state) | |
617 | continue; | |
618 | ||
619 | if (l2cap_pi(sk)->psm == psm) { | |
620 | /* Exact match. */ | |
621 | if (!bacmp(&bt_sk(sk)->src, src)) | |
622 | break; | |
623 | ||
624 | /* Closest match */ | |
625 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
626 | sk1 = sk; | |
627 | } | |
628 | } | |
629 | return node ? sk : sk1; | |
630 | } | |
631 | ||
632 | /* Find socket with given address (psm, src). | |
633 | * Returns locked socket */ | |
8e036fc3 | 634 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
635 | { |
636 | struct sock *s; | |
637 | read_lock(&l2cap_sk_list.lock); | |
638 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
af05b30b GP |
639 | if (s) |
640 | bh_lock_sock(s); | |
1da177e4 LT |
641 | read_unlock(&l2cap_sk_list.lock); |
642 | return s; | |
643 | } | |
644 | ||
645 | static void l2cap_sock_destruct(struct sock *sk) | |
646 | { | |
647 | BT_DBG("sk %p", sk); | |
648 | ||
649 | skb_queue_purge(&sk->sk_receive_queue); | |
650 | skb_queue_purge(&sk->sk_write_queue); | |
651 | } | |
652 | ||
653 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
654 | { | |
655 | struct sock *sk; | |
656 | ||
657 | BT_DBG("parent %p", parent); | |
658 | ||
659 | /* Close not yet accepted channels */ | |
660 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
661 | l2cap_sock_close(sk); | |
662 | ||
b1235d79 | 663 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
664 | sock_set_flag(parent, SOCK_ZAPPED); |
665 | } | |
666 | ||
667 | /* Kill socket (only if zapped and orphan) | |
668 | * Must be called on unlocked socket. | |
669 | */ | |
670 | static void l2cap_sock_kill(struct sock *sk) | |
671 | { | |
672 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
673 | return; | |
674 | ||
675 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
676 | ||
677 | /* Kill poor orphan */ | |
678 | bt_sock_unlink(&l2cap_sk_list, sk); | |
679 | sock_set_flag(sk, SOCK_DEAD); | |
680 | sock_put(sk); | |
681 | } | |
682 | ||
683 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
684 | { | |
685 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
686 | ||
687 | switch (sk->sk_state) { | |
688 | case BT_LISTEN: | |
689 | l2cap_sock_cleanup_listen(sk); | |
690 | break; | |
691 | ||
692 | case BT_CONNECTED: | |
693 | case BT_CONFIG: | |
1da177e4 LT |
694 | if (sk->sk_type == SOCK_SEQPACKET) { |
695 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1da177e4 LT |
696 | |
697 | sk->sk_state = BT_DISCONN; | |
698 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
22121fc9 | 699 | l2cap_send_disconn_req(conn, sk); |
b1235d79 | 700 | } else |
1da177e4 | 701 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
702 | break; |
703 | ||
f66dc81f MH |
704 | case BT_CONNECT2: |
705 | if (sk->sk_type == SOCK_SEQPACKET) { | |
706 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
707 | struct l2cap_conn_rsp rsp; | |
708 | __u16 result; | |
709 | ||
710 | if (bt_sk(sk)->defer_setup) | |
711 | result = L2CAP_CR_SEC_BLOCK; | |
712 | else | |
713 | result = L2CAP_CR_BAD_PSM; | |
714 | ||
715 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
716 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
717 | rsp.result = cpu_to_le16(result); | |
718 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
719 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
720 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
721 | } else | |
722 | l2cap_chan_del(sk, reason); | |
723 | break; | |
724 | ||
1da177e4 LT |
725 | case BT_CONNECT: |
726 | case BT_DISCONN: | |
727 | l2cap_chan_del(sk, reason); | |
728 | break; | |
729 | ||
730 | default: | |
731 | sock_set_flag(sk, SOCK_ZAPPED); | |
732 | break; | |
733 | } | |
734 | } | |
735 | ||
736 | /* Must be called on unlocked socket. */ | |
737 | static void l2cap_sock_close(struct sock *sk) | |
738 | { | |
739 | l2cap_sock_clear_timer(sk); | |
740 | lock_sock(sk); | |
741 | __l2cap_sock_close(sk, ECONNRESET); | |
742 | release_sock(sk); | |
743 | l2cap_sock_kill(sk); | |
744 | } | |
745 | ||
746 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
747 | { | |
748 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
749 | ||
750 | BT_DBG("sk %p", sk); | |
751 | ||
752 | if (parent) { | |
753 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
754 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
755 | ||
1da177e4 LT |
756 | pi->imtu = l2cap_pi(parent)->imtu; |
757 | pi->omtu = l2cap_pi(parent)->omtu; | |
c6b03cf9 MH |
758 | pi->mode = l2cap_pi(parent)->mode; |
759 | pi->fcs = l2cap_pi(parent)->fcs; | |
2af6b9d5 MH |
760 | pi->sec_level = l2cap_pi(parent)->sec_level; |
761 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
762 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
763 | } else { |
764 | pi->imtu = L2CAP_DEFAULT_MTU; | |
765 | pi->omtu = 0; | |
c6b03cf9 MH |
766 | pi->mode = L2CAP_MODE_BASIC; |
767 | pi->fcs = L2CAP_FCS_CRC16; | |
2af6b9d5 MH |
768 | pi->sec_level = BT_SECURITY_LOW; |
769 | pi->role_switch = 0; | |
770 | pi->force_reliable = 0; | |
1da177e4 LT |
771 | } |
772 | ||
773 | /* Default config options */ | |
5dee9e7c | 774 | pi->conf_len = 0; |
1da177e4 LT |
775 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
776 | } | |
777 | ||
778 | static struct proto l2cap_proto = { | |
779 | .name = "L2CAP", | |
780 | .owner = THIS_MODULE, | |
781 | .obj_size = sizeof(struct l2cap_pinfo) | |
782 | }; | |
783 | ||
1b8d7ae4 | 784 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
785 | { |
786 | struct sock *sk; | |
787 | ||
6257ff21 | 788 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
789 | if (!sk) |
790 | return NULL; | |
791 | ||
792 | sock_init_data(sock, sk); | |
793 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
794 | ||
795 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 796 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
797 | |
798 | sock_reset_flag(sk, SOCK_ZAPPED); | |
799 | ||
800 | sk->sk_protocol = proto; | |
b1235d79 | 801 | sk->sk_state = BT_OPEN; |
1da177e4 | 802 | |
b1235d79 | 803 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
804 | |
805 | bt_sock_link(&l2cap_sk_list, sk); | |
806 | return sk; | |
807 | } | |
808 | ||
1b8d7ae4 | 809 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
810 | { |
811 | struct sock *sk; | |
812 | ||
813 | BT_DBG("sock %p", sock); | |
814 | ||
815 | sock->state = SS_UNCONNECTED; | |
816 | ||
817 | if (sock->type != SOCK_SEQPACKET && | |
818 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
819 | return -ESOCKTNOSUPPORT; | |
820 | ||
821 | if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW)) | |
822 | return -EPERM; | |
823 | ||
824 | sock->ops = &l2cap_sock_ops; | |
825 | ||
1b8d7ae4 | 826 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
827 | if (!sk) |
828 | return -ENOMEM; | |
829 | ||
830 | l2cap_sock_init(sk, NULL); | |
831 | return 0; | |
832 | } | |
833 | ||
f29972de | 834 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
1da177e4 | 835 | { |
1da177e4 | 836 | struct sock *sk = sock->sk; |
f29972de MH |
837 | struct sockaddr_l2 la; |
838 | int len, err = 0; | |
1da177e4 | 839 | |
f29972de | 840 | BT_DBG("sk %p", sk); |
1da177e4 LT |
841 | |
842 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
843 | return -EINVAL; | |
844 | ||
f29972de MH |
845 | memset(&la, 0, sizeof(la)); |
846 | len = min_t(unsigned int, sizeof(la), alen); | |
847 | memcpy(&la, addr, len); | |
848 | ||
2a517ca6 MH |
849 | if (la.l2_cid) |
850 | return -EINVAL; | |
851 | ||
1da177e4 LT |
852 | lock_sock(sk); |
853 | ||
854 | if (sk->sk_state != BT_OPEN) { | |
855 | err = -EBADFD; | |
856 | goto done; | |
857 | } | |
858 | ||
b4324b5d | 859 | if (la.l2_psm && __le16_to_cpu(la.l2_psm) < 0x1001 && |
847641d7 MH |
860 | !capable(CAP_NET_BIND_SERVICE)) { |
861 | err = -EACCES; | |
862 | goto done; | |
863 | } | |
8e87d142 | 864 | |
1da177e4 LT |
865 | write_lock_bh(&l2cap_sk_list.lock); |
866 | ||
f29972de | 867 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
1da177e4 LT |
868 | err = -EADDRINUSE; |
869 | } else { | |
870 | /* Save source address */ | |
f29972de MH |
871 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
872 | l2cap_pi(sk)->psm = la.l2_psm; | |
873 | l2cap_pi(sk)->sport = la.l2_psm; | |
1da177e4 | 874 | sk->sk_state = BT_BOUND; |
2af6b9d5 | 875 | |
b4324b5d MH |
876 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
877 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
2af6b9d5 | 878 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
1da177e4 LT |
879 | } |
880 | ||
881 | write_unlock_bh(&l2cap_sk_list.lock); | |
882 | ||
883 | done: | |
884 | release_sock(sk); | |
885 | return err; | |
886 | } | |
887 | ||
888 | static int l2cap_do_connect(struct sock *sk) | |
889 | { | |
890 | bdaddr_t *src = &bt_sk(sk)->src; | |
891 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
892 | struct l2cap_conn *conn; | |
893 | struct hci_conn *hcon; | |
894 | struct hci_dev *hdev; | |
09ab6f4c | 895 | __u8 auth_type; |
44d0e48e | 896 | int err; |
1da177e4 | 897 | |
f29972de MH |
898 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
899 | l2cap_pi(sk)->psm); | |
1da177e4 | 900 | |
af05b30b GP |
901 | hdev = hci_get_route(dst, src); |
902 | if (!hdev) | |
1da177e4 LT |
903 | return -EHOSTUNREACH; |
904 | ||
905 | hci_dev_lock_bh(hdev); | |
906 | ||
907 | err = -ENOMEM; | |
908 | ||
8c1b2355 | 909 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
910 | switch (l2cap_pi(sk)->sec_level) { |
911 | case BT_SECURITY_HIGH: | |
8c1b2355 | 912 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
913 | break; |
914 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 915 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
916 | break; |
917 | default: | |
09ab6f4c | 918 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
919 | break; |
920 | } | |
8c1b2355 | 921 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 922 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 923 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 924 | else |
8c1b2355 | 925 | auth_type = HCI_AT_NO_BONDING; |
435fef20 MH |
926 | |
927 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
928 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
8c1b2355 | 929 | } else { |
2af6b9d5 MH |
930 | switch (l2cap_pi(sk)->sec_level) { |
931 | case BT_SECURITY_HIGH: | |
8c1b2355 | 932 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
933 | break; |
934 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 935 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
936 | break; |
937 | default: | |
8c1b2355 | 938 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
939 | break; |
940 | } | |
09ab6f4c MH |
941 | } |
942 | ||
2af6b9d5 MH |
943 | hcon = hci_connect(hdev, ACL_LINK, dst, |
944 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
945 | if (!hcon) |
946 | goto done; | |
947 | ||
948 | conn = l2cap_conn_add(hcon, 0); | |
949 | if (!conn) { | |
950 | hci_conn_put(hcon); | |
951 | goto done; | |
952 | } | |
953 | ||
954 | err = 0; | |
955 | ||
956 | /* Update source addr of the socket */ | |
957 | bacpy(src, conn->src); | |
958 | ||
959 | l2cap_chan_add(conn, sk, NULL); | |
960 | ||
961 | sk->sk_state = BT_CONNECT; | |
962 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
963 | ||
964 | if (hcon->state == BT_CONNECTED) { | |
79d554a6 | 965 | if (sk->sk_type != SOCK_SEQPACKET) { |
1da177e4 LT |
966 | l2cap_sock_clear_timer(sk); |
967 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
968 | } else |
969 | l2cap_do_start(sk); | |
1da177e4 LT |
970 | } |
971 | ||
972 | done: | |
973 | hci_dev_unlock_bh(hdev); | |
974 | hci_dev_put(hdev); | |
975 | return err; | |
976 | } | |
977 | ||
978 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
979 | { | |
1da177e4 | 980 | struct sock *sk = sock->sk; |
f29972de MH |
981 | struct sockaddr_l2 la; |
982 | int len, err = 0; | |
1da177e4 | 983 | |
1da177e4 LT |
984 | BT_DBG("sk %p", sk); |
985 | ||
2a517ca6 MH |
986 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
987 | return -EINVAL; | |
1da177e4 | 988 | |
f29972de MH |
989 | memset(&la, 0, sizeof(la)); |
990 | len = min_t(unsigned int, sizeof(la), alen); | |
991 | memcpy(&la, addr, len); | |
992 | ||
2a517ca6 MH |
993 | if (la.l2_cid) |
994 | return -EINVAL; | |
995 | ||
996 | lock_sock(sk); | |
997 | ||
f29972de | 998 | if (sk->sk_type == SOCK_SEQPACKET && !la.l2_psm) { |
1da177e4 LT |
999 | err = -EINVAL; |
1000 | goto done; | |
1001 | } | |
1002 | ||
c6b03cf9 MH |
1003 | switch (l2cap_pi(sk)->mode) { |
1004 | case L2CAP_MODE_BASIC: | |
1005 | break; | |
1006 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1007 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1008 | if (enable_ertm) |
1009 | break; | |
1010 | /* fall through */ | |
1011 | default: | |
1012 | err = -ENOTSUPP; | |
1013 | goto done; | |
1014 | } | |
1015 | ||
af05b30b | 1016 | switch (sk->sk_state) { |
1da177e4 LT |
1017 | case BT_CONNECT: |
1018 | case BT_CONNECT2: | |
1019 | case BT_CONFIG: | |
1020 | /* Already connecting */ | |
1021 | goto wait; | |
1022 | ||
1023 | case BT_CONNECTED: | |
1024 | /* Already connected */ | |
1025 | goto done; | |
1026 | ||
1027 | case BT_OPEN: | |
1028 | case BT_BOUND: | |
1029 | /* Can connect */ | |
1030 | break; | |
1031 | ||
1032 | default: | |
1033 | err = -EBADFD; | |
1034 | goto done; | |
1035 | } | |
1036 | ||
1037 | /* Set destination address and psm */ | |
f29972de MH |
1038 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
1039 | l2cap_pi(sk)->psm = la.l2_psm; | |
1da177e4 | 1040 | |
af05b30b GP |
1041 | err = l2cap_do_connect(sk); |
1042 | if (err) | |
1da177e4 LT |
1043 | goto done; |
1044 | ||
1045 | wait: | |
1046 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
1047 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
1048 | done: | |
1049 | release_sock(sk); | |
1050 | return err; | |
1051 | } | |
1052 | ||
1053 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
1054 | { | |
1055 | struct sock *sk = sock->sk; | |
1056 | int err = 0; | |
1057 | ||
1058 | BT_DBG("sk %p backlog %d", sk, backlog); | |
1059 | ||
1060 | lock_sock(sk); | |
1061 | ||
1062 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
1063 | err = -EBADFD; | |
1064 | goto done; | |
1065 | } | |
1066 | ||
c6b03cf9 MH |
1067 | switch (l2cap_pi(sk)->mode) { |
1068 | case L2CAP_MODE_BASIC: | |
1069 | break; | |
1070 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1071 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1072 | if (enable_ertm) |
1073 | break; | |
1074 | /* fall through */ | |
1075 | default: | |
1076 | err = -ENOTSUPP; | |
1077 | goto done; | |
1078 | } | |
1079 | ||
1da177e4 LT |
1080 | if (!l2cap_pi(sk)->psm) { |
1081 | bdaddr_t *src = &bt_sk(sk)->src; | |
1082 | u16 psm; | |
1083 | ||
1084 | err = -EINVAL; | |
1085 | ||
1086 | write_lock_bh(&l2cap_sk_list.lock); | |
1087 | ||
1088 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
b4324b5d MH |
1089 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
1090 | l2cap_pi(sk)->psm = cpu_to_le16(psm); | |
1091 | l2cap_pi(sk)->sport = cpu_to_le16(psm); | |
1da177e4 LT |
1092 | err = 0; |
1093 | break; | |
1094 | } | |
1095 | ||
1096 | write_unlock_bh(&l2cap_sk_list.lock); | |
1097 | ||
1098 | if (err < 0) | |
1099 | goto done; | |
1100 | } | |
1101 | ||
1102 | sk->sk_max_ack_backlog = backlog; | |
1103 | sk->sk_ack_backlog = 0; | |
1104 | sk->sk_state = BT_LISTEN; | |
1105 | ||
1106 | done: | |
1107 | release_sock(sk); | |
1108 | return err; | |
1109 | } | |
1110 | ||
1111 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
1112 | { | |
1113 | DECLARE_WAITQUEUE(wait, current); | |
1114 | struct sock *sk = sock->sk, *nsk; | |
1115 | long timeo; | |
1116 | int err = 0; | |
1117 | ||
fcc70d5f | 1118 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1119 | |
1120 | if (sk->sk_state != BT_LISTEN) { | |
1121 | err = -EBADFD; | |
1122 | goto done; | |
1123 | } | |
1124 | ||
1125 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1126 | ||
1127 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1128 | ||
1129 | /* Wait for an incoming connection. (wake-one). */ | |
1130 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
1131 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
1132 | set_current_state(TASK_INTERRUPTIBLE); | |
1133 | if (!timeo) { | |
1134 | err = -EAGAIN; | |
1135 | break; | |
1136 | } | |
1137 | ||
1138 | release_sock(sk); | |
1139 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1140 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1141 | |
1142 | if (sk->sk_state != BT_LISTEN) { | |
1143 | err = -EBADFD; | |
1144 | break; | |
1145 | } | |
1146 | ||
1147 | if (signal_pending(current)) { | |
1148 | err = sock_intr_errno(timeo); | |
1149 | break; | |
1150 | } | |
1151 | } | |
1152 | set_current_state(TASK_RUNNING); | |
1153 | remove_wait_queue(sk->sk_sleep, &wait); | |
1154 | ||
1155 | if (err) | |
1156 | goto done; | |
1157 | ||
1158 | newsock->state = SS_CONNECTED; | |
1159 | ||
1160 | BT_DBG("new socket %p", nsk); | |
1161 | ||
1162 | done: | |
1163 | release_sock(sk); | |
1164 | return err; | |
1165 | } | |
1166 | ||
1167 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1168 | { | |
1169 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1170 | struct sock *sk = sock->sk; | |
1171 | ||
1172 | BT_DBG("sock %p, sk %p", sock, sk); | |
1173 | ||
1174 | addr->sa_family = AF_BLUETOOTH; | |
1175 | *len = sizeof(struct sockaddr_l2); | |
1176 | ||
f29972de MH |
1177 | if (peer) { |
1178 | la->l2_psm = l2cap_pi(sk)->psm; | |
1da177e4 | 1179 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
b4324b5d | 1180 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
f29972de MH |
1181 | } else { |
1182 | la->l2_psm = l2cap_pi(sk)->sport; | |
1da177e4 | 1183 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
b4324b5d | 1184 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
f29972de | 1185 | } |
1da177e4 | 1186 | |
1da177e4 LT |
1187 | return 0; |
1188 | } | |
1189 | ||
e90bac06 GP |
1190 | static void l2cap_monitor_timeout(unsigned long arg) |
1191 | { | |
1192 | struct sock *sk = (void *) arg; | |
1193 | u16 control; | |
1194 | ||
1195 | if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { | |
1196 | l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk); | |
1197 | return; | |
1198 | } | |
1199 | ||
1200 | l2cap_pi(sk)->retry_count++; | |
1201 | __mod_monitor_timer(); | |
1202 | ||
1203 | control = L2CAP_CTRL_POLL; | |
1204 | control |= L2CAP_SUPER_RCV_READY; | |
1205 | l2cap_send_sframe(l2cap_pi(sk), control); | |
1206 | } | |
1207 | ||
1208 | static void l2cap_retrans_timeout(unsigned long arg) | |
1209 | { | |
1210 | struct sock *sk = (void *) arg; | |
1211 | u16 control; | |
1212 | ||
1213 | l2cap_pi(sk)->retry_count = 1; | |
1214 | __mod_monitor_timer(); | |
1215 | ||
1216 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
1217 | ||
1218 | control = L2CAP_CTRL_POLL; | |
1219 | control |= L2CAP_SUPER_RCV_READY; | |
1220 | l2cap_send_sframe(l2cap_pi(sk), control); | |
1221 | } | |
1222 | ||
1c2acffb | 1223 | static void l2cap_drop_acked_frames(struct sock *sk) |
1da177e4 | 1224 | { |
1c2acffb | 1225 | struct sk_buff *skb; |
1da177e4 | 1226 | |
1c2acffb GP |
1227 | while ((skb = skb_peek(TX_QUEUE(sk)))) { |
1228 | if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq) | |
1229 | break; | |
1da177e4 | 1230 | |
1c2acffb GP |
1231 | skb = skb_dequeue(TX_QUEUE(sk)); |
1232 | kfree_skb(skb); | |
1da177e4 | 1233 | |
1c2acffb GP |
1234 | l2cap_pi(sk)->unacked_frames--; |
1235 | } | |
1da177e4 | 1236 | |
e90bac06 GP |
1237 | if (!l2cap_pi(sk)->unacked_frames) |
1238 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
1239 | ||
1c2acffb GP |
1240 | return; |
1241 | } | |
1da177e4 | 1242 | |
1c2acffb GP |
1243 | static inline int l2cap_do_send(struct sock *sk, struct sk_buff *skb) |
1244 | { | |
1245 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1246 | int err; | |
1247 | ||
1248 | BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len); | |
1da177e4 | 1249 | |
1c2acffb GP |
1250 | err = hci_send_acl(pi->conn->hcon, skb, 0); |
1251 | if (err < 0) | |
1252 | kfree_skb(skb); | |
1253 | ||
1254 | return err; | |
1255 | } | |
1256 | ||
6840ed07 GP |
1257 | static int l2cap_streaming_send(struct sock *sk) |
1258 | { | |
1259 | struct sk_buff *skb, *tx_skb; | |
1260 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1261 | u16 control, fcs; |
6840ed07 GP |
1262 | int err; |
1263 | ||
1264 | while ((skb = sk->sk_send_head)) { | |
1265 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1266 | ||
1267 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
1268 | control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; | |
1269 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1270 | ||
fcc203c3 GP |
1271 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { |
1272 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1273 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1274 | } | |
1275 | ||
6840ed07 GP |
1276 | err = l2cap_do_send(sk, tx_skb); |
1277 | if (err < 0) { | |
1278 | l2cap_send_disconn_req(pi->conn, sk); | |
1279 | return err; | |
1280 | } | |
1281 | ||
1282 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1283 | ||
1284 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1285 | sk->sk_send_head = NULL; | |
1286 | else | |
1287 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
1288 | ||
1289 | skb = skb_dequeue(TX_QUEUE(sk)); | |
1290 | kfree_skb(skb); | |
1291 | } | |
1292 | return 0; | |
1293 | } | |
1294 | ||
8f17154f GP |
1295 | static int l2cap_retransmit_frame(struct sock *sk, u8 tx_seq) |
1296 | { | |
1297 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1298 | struct sk_buff *skb, *tx_skb; | |
1299 | u16 control, fcs; | |
1300 | int err; | |
1301 | ||
1302 | skb = skb_peek(TX_QUEUE(sk)); | |
1303 | do { | |
1304 | if (bt_cb(skb)->tx_seq != tx_seq) { | |
1305 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1306 | break; | |
1307 | skb = skb_queue_next(TX_QUEUE(sk), skb); | |
1308 | continue; | |
1309 | } | |
1310 | ||
1311 | if (pi->remote_max_tx && | |
1312 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
1313 | l2cap_send_disconn_req(pi->conn, sk); | |
1314 | break; | |
1315 | } | |
1316 | ||
1317 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1318 | bt_cb(skb)->retries++; | |
1319 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
1320 | control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT) | |
1321 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); | |
1322 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1323 | ||
1324 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { | |
1325 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1326 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1327 | } | |
1328 | ||
1329 | err = l2cap_do_send(sk, tx_skb); | |
1330 | if (err < 0) { | |
1331 | l2cap_send_disconn_req(pi->conn, sk); | |
1332 | return err; | |
1333 | } | |
1334 | break; | |
1335 | } while(1); | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1c2acffb GP |
1339 | static int l2cap_ertm_send(struct sock *sk) |
1340 | { | |
1341 | struct sk_buff *skb, *tx_skb; | |
1342 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1343 | u16 control, fcs; |
1c2acffb GP |
1344 | int err; |
1345 | ||
e90bac06 GP |
1346 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
1347 | return 0; | |
1348 | ||
1c2acffb GP |
1349 | while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk))) { |
1350 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1351 | ||
e90bac06 GP |
1352 | if (pi->remote_max_tx && |
1353 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
1354 | l2cap_send_disconn_req(pi->conn, sk); | |
1355 | break; | |
1356 | } | |
1357 | ||
1358 | bt_cb(skb)->retries++; | |
1359 | ||
1c2acffb GP |
1360 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
1361 | control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT) | |
1362 | | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); | |
1363 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1364 | ||
e90bac06 | 1365 | |
fcc203c3 GP |
1366 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { |
1367 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); | |
1368 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); | |
1369 | } | |
1370 | ||
1c2acffb GP |
1371 | err = l2cap_do_send(sk, tx_skb); |
1372 | if (err < 0) { | |
1373 | l2cap_send_disconn_req(pi->conn, sk); | |
1374 | return err; | |
1375 | } | |
e90bac06 | 1376 | __mod_retrans_timer(); |
1c2acffb GP |
1377 | |
1378 | bt_cb(skb)->tx_seq = pi->next_tx_seq; | |
1379 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1380 | ||
1381 | pi->unacked_frames++; | |
1382 | ||
1383 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1384 | sk->sk_send_head = NULL; | |
1385 | else | |
1386 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
1387 | } | |
1388 | ||
1389 | return 0; | |
1390 | } | |
1391 | ||
1392 | static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb) | |
1393 | { | |
1394 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1395 | struct sk_buff **frag; | |
1396 | int err, sent = 0; | |
1da177e4 LT |
1397 | |
1398 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
1c2acffb | 1399 | return -EFAULT; |
1da177e4 LT |
1400 | } |
1401 | ||
1402 | sent += count; | |
1403 | len -= count; | |
1404 | ||
1405 | /* Continuation fragments (no L2CAP header) */ | |
1406 | frag = &skb_shinfo(skb)->frag_list; | |
1407 | while (len) { | |
1408 | count = min_t(unsigned int, conn->mtu, len); | |
1409 | ||
1410 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1411 | if (!*frag) | |
1c2acffb GP |
1412 | return -EFAULT; |
1413 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) | |
1414 | return -EFAULT; | |
1da177e4 LT |
1415 | |
1416 | sent += count; | |
1417 | len -= count; | |
1418 | ||
1419 | frag = &(*frag)->next; | |
1420 | } | |
1da177e4 LT |
1421 | |
1422 | return sent; | |
1c2acffb | 1423 | } |
1da177e4 | 1424 | |
1c2acffb GP |
1425 | static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
1426 | { | |
1427 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1428 | struct sk_buff *skb; | |
1429 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1430 | struct l2cap_hdr *lh; | |
1431 | ||
1432 | BT_DBG("sk %p len %d", sk, (int)len); | |
1433 | ||
1434 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1435 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1436 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1437 | if (!skb) | |
1438 | return ERR_PTR(-ENOMEM); | |
1439 | ||
1440 | /* Create L2CAP header */ | |
1441 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1442 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1443 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1444 | put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2)); | |
1445 | ||
1446 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1447 | if (unlikely(err < 0)) { | |
1448 | kfree_skb(skb); | |
1449 | return ERR_PTR(err); | |
1450 | } | |
1451 | return skb; | |
1452 | } | |
1453 | ||
1454 | static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len) | |
1455 | { | |
1456 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1457 | struct sk_buff *skb; | |
1458 | int err, count, hlen = L2CAP_HDR_SIZE; | |
1459 | struct l2cap_hdr *lh; | |
1460 | ||
1461 | BT_DBG("sk %p len %d", sk, (int)len); | |
1462 | ||
1463 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1464 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1465 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1466 | if (!skb) | |
1467 | return ERR_PTR(-ENOMEM); | |
1468 | ||
1469 | /* Create L2CAP header */ | |
1470 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1471 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1472 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1473 | ||
1474 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1475 | if (unlikely(err < 0)) { | |
1476 | kfree_skb(skb); | |
1477 | return ERR_PTR(err); | |
1478 | } | |
1479 | return skb; | |
1480 | } | |
1481 | ||
6840ed07 | 1482 | static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
1c2acffb GP |
1483 | { |
1484 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1485 | struct sk_buff *skb; | |
1486 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1487 | struct l2cap_hdr *lh; | |
1488 | ||
1489 | BT_DBG("sk %p len %d", sk, (int)len); | |
1490 | ||
c74e560c GP |
1491 | if (sdulen) |
1492 | hlen += 2; | |
1493 | ||
fcc203c3 GP |
1494 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1495 | hlen += 2; | |
1496 | ||
1c2acffb GP |
1497 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
1498 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1499 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1500 | if (!skb) | |
1501 | return ERR_PTR(-ENOMEM); | |
1502 | ||
1503 | /* Create L2CAP header */ | |
1504 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1505 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1506 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1507 | put_unaligned_le16(control, skb_put(skb, 2)); | |
c74e560c GP |
1508 | if (sdulen) |
1509 | put_unaligned_le16(sdulen, skb_put(skb, 2)); | |
1c2acffb GP |
1510 | |
1511 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1512 | if (unlikely(err < 0)) { | |
1513 | kfree_skb(skb); | |
1514 | return ERR_PTR(err); | |
1515 | } | |
e90bac06 | 1516 | |
fcc203c3 GP |
1517 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1518 | put_unaligned_le16(0, skb_put(skb, 2)); | |
1519 | ||
e90bac06 | 1520 | bt_cb(skb)->retries = 0; |
1c2acffb | 1521 | return skb; |
1da177e4 LT |
1522 | } |
1523 | ||
c74e560c GP |
1524 | static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len) |
1525 | { | |
1526 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1527 | struct sk_buff *skb; | |
1528 | struct sk_buff_head sar_queue; | |
1529 | u16 control; | |
1530 | size_t size = 0; | |
1531 | ||
1532 | __skb_queue_head_init(&sar_queue); | |
1533 | control = L2CAP_SDU_START; | |
6840ed07 | 1534 | skb = l2cap_create_iframe_pdu(sk, msg, pi->max_pdu_size, control, len); |
c74e560c GP |
1535 | if (IS_ERR(skb)) |
1536 | return PTR_ERR(skb); | |
1537 | ||
1538 | __skb_queue_tail(&sar_queue, skb); | |
1539 | len -= pi->max_pdu_size; | |
1540 | size +=pi->max_pdu_size; | |
1541 | control = 0; | |
1542 | ||
1543 | while (len > 0) { | |
1544 | size_t buflen; | |
1545 | ||
1546 | if (len > pi->max_pdu_size) { | |
1547 | control |= L2CAP_SDU_CONTINUE; | |
1548 | buflen = pi->max_pdu_size; | |
1549 | } else { | |
1550 | control |= L2CAP_SDU_END; | |
1551 | buflen = len; | |
1552 | } | |
1553 | ||
6840ed07 | 1554 | skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0); |
c74e560c GP |
1555 | if (IS_ERR(skb)) { |
1556 | skb_queue_purge(&sar_queue); | |
1557 | return PTR_ERR(skb); | |
1558 | } | |
1559 | ||
1560 | __skb_queue_tail(&sar_queue, skb); | |
1561 | len -= buflen; | |
1562 | size += buflen; | |
1563 | control = 0; | |
1564 | } | |
1565 | skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk)); | |
1566 | if (sk->sk_send_head == NULL) | |
1567 | sk->sk_send_head = sar_queue.next; | |
1568 | ||
1569 | return size; | |
1570 | } | |
1571 | ||
1da177e4 LT |
1572 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
1573 | { | |
1574 | struct sock *sk = sock->sk; | |
1c2acffb GP |
1575 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
1576 | struct sk_buff *skb; | |
1577 | u16 control; | |
1578 | int err; | |
1da177e4 LT |
1579 | |
1580 | BT_DBG("sock %p, sk %p", sock, sk); | |
1581 | ||
c1cbe4b7 BL |
1582 | err = sock_error(sk); |
1583 | if (err) | |
1584 | return err; | |
1da177e4 LT |
1585 | |
1586 | if (msg->msg_flags & MSG_OOB) | |
1587 | return -EOPNOTSUPP; | |
1588 | ||
1589 | /* Check outgoing MTU */ | |
1c2acffb GP |
1590 | if (sk->sk_type == SOCK_SEQPACKET && pi->mode == L2CAP_MODE_BASIC |
1591 | && len > pi->omtu) | |
1da177e4 LT |
1592 | return -EINVAL; |
1593 | ||
1594 | lock_sock(sk); | |
1595 | ||
1c2acffb | 1596 | if (sk->sk_state != BT_CONNECTED) { |
1da177e4 | 1597 | err = -ENOTCONN; |
1c2acffb GP |
1598 | goto done; |
1599 | } | |
1da177e4 | 1600 | |
1c2acffb GP |
1601 | /* Connectionless channel */ |
1602 | if (sk->sk_type == SOCK_DGRAM) { | |
1603 | skb = l2cap_create_connless_pdu(sk, msg, len); | |
1604 | err = l2cap_do_send(sk, skb); | |
1605 | goto done; | |
1606 | } | |
1607 | ||
1608 | switch (pi->mode) { | |
1609 | case L2CAP_MODE_BASIC: | |
1610 | /* Create a basic PDU */ | |
1611 | skb = l2cap_create_basic_pdu(sk, msg, len); | |
1612 | if (IS_ERR(skb)) { | |
1613 | err = PTR_ERR(skb); | |
1614 | goto done; | |
1615 | } | |
1616 | ||
1617 | err = l2cap_do_send(sk, skb); | |
1618 | if (!err) | |
1619 | err = len; | |
1620 | break; | |
1621 | ||
1622 | case L2CAP_MODE_ERTM: | |
6840ed07 | 1623 | case L2CAP_MODE_STREAMING: |
1c2acffb | 1624 | /* Entire SDU fits into one PDU */ |
c74e560c | 1625 | if (len <= pi->max_pdu_size) { |
1c2acffb | 1626 | control = L2CAP_SDU_UNSEGMENTED; |
6840ed07 | 1627 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
1c2acffb GP |
1628 | if (IS_ERR(skb)) { |
1629 | err = PTR_ERR(skb); | |
1630 | goto done; | |
1631 | } | |
c74e560c GP |
1632 | __skb_queue_tail(TX_QUEUE(sk), skb); |
1633 | if (sk->sk_send_head == NULL) | |
1634 | sk->sk_send_head = skb; | |
1c2acffb | 1635 | } else { |
c74e560c GP |
1636 | /* Segment SDU into multiples PDUs */ |
1637 | err = l2cap_sar_segment_sdu(sk, msg, len); | |
1638 | if (err < 0) | |
1639 | goto done; | |
1c2acffb | 1640 | } |
1c2acffb | 1641 | |
6840ed07 GP |
1642 | if (pi->mode == L2CAP_MODE_STREAMING) |
1643 | err = l2cap_streaming_send(sk); | |
1644 | else | |
1645 | err = l2cap_ertm_send(sk); | |
1646 | ||
1c2acffb GP |
1647 | if (!err) |
1648 | err = len; | |
1649 | break; | |
1650 | ||
1651 | default: | |
1652 | BT_DBG("bad state %1.1x", pi->mode); | |
1653 | err = -EINVAL; | |
1654 | } | |
1655 | ||
1656 | done: | |
1da177e4 LT |
1657 | release_sock(sk); |
1658 | return err; | |
1659 | } | |
1660 | ||
f66dc81f MH |
1661 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1662 | { | |
1663 | struct sock *sk = sock->sk; | |
1664 | ||
1665 | lock_sock(sk); | |
1666 | ||
1667 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1668 | struct l2cap_conn_rsp rsp; | |
1669 | ||
1670 | sk->sk_state = BT_CONFIG; | |
1671 | ||
1672 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1673 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1674 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1675 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1676 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1677 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1678 | ||
1679 | release_sock(sk); | |
1680 | return 0; | |
1681 | } | |
1682 | ||
1683 | release_sock(sk); | |
1684 | ||
1685 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1686 | } | |
1687 | ||
d58daf42 | 1688 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen) |
1da177e4 LT |
1689 | { |
1690 | struct sock *sk = sock->sk; | |
1691 | struct l2cap_options opts; | |
f29972de | 1692 | int len, err = 0; |
1da177e4 LT |
1693 | u32 opt; |
1694 | ||
1695 | BT_DBG("sk %p", sk); | |
1696 | ||
1697 | lock_sock(sk); | |
1698 | ||
1699 | switch (optname) { | |
1700 | case L2CAP_OPTIONS: | |
0878b666 MH |
1701 | opts.imtu = l2cap_pi(sk)->imtu; |
1702 | opts.omtu = l2cap_pi(sk)->omtu; | |
1703 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1704 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1705 | opts.fcs = l2cap_pi(sk)->fcs; |
0878b666 | 1706 | |
1da177e4 LT |
1707 | len = min_t(unsigned int, sizeof(opts), optlen); |
1708 | if (copy_from_user((char *) &opts, optval, len)) { | |
1709 | err = -EFAULT; | |
1710 | break; | |
1711 | } | |
0878b666 | 1712 | |
c6b03cf9 MH |
1713 | l2cap_pi(sk)->imtu = opts.imtu; |
1714 | l2cap_pi(sk)->omtu = opts.omtu; | |
1715 | l2cap_pi(sk)->mode = opts.mode; | |
fcc203c3 | 1716 | l2cap_pi(sk)->fcs = opts.fcs; |
1da177e4 LT |
1717 | break; |
1718 | ||
1719 | case L2CAP_LM: | |
1720 | if (get_user(opt, (u32 __user *) optval)) { | |
1721 | err = -EFAULT; | |
1722 | break; | |
1723 | } | |
1724 | ||
2af6b9d5 MH |
1725 | if (opt & L2CAP_LM_AUTH) |
1726 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
1727 | if (opt & L2CAP_LM_ENCRYPT) | |
1728 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
1729 | if (opt & L2CAP_LM_SECURE) | |
1730 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
1731 | ||
1732 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
1733 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
1734 | break; |
1735 | ||
1736 | default: | |
1737 | err = -ENOPROTOOPT; | |
1738 | break; | |
1739 | } | |
1740 | ||
1741 | release_sock(sk); | |
1742 | return err; | |
1743 | } | |
1744 | ||
d58daf42 MH |
1745 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) |
1746 | { | |
1747 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
1748 | struct bt_security sec; |
1749 | int len, err = 0; | |
f66dc81f | 1750 | u32 opt; |
d58daf42 MH |
1751 | |
1752 | BT_DBG("sk %p", sk); | |
1753 | ||
1754 | if (level == SOL_L2CAP) | |
1755 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
1756 | ||
0588d94f MH |
1757 | if (level != SOL_BLUETOOTH) |
1758 | return -ENOPROTOOPT; | |
1759 | ||
d58daf42 MH |
1760 | lock_sock(sk); |
1761 | ||
1762 | switch (optname) { | |
2af6b9d5 | 1763 | case BT_SECURITY: |
2526d3d8 | 1764 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1765 | err = -EINVAL; |
1766 | break; | |
1767 | } | |
1768 | ||
2af6b9d5 MH |
1769 | sec.level = BT_SECURITY_LOW; |
1770 | ||
1771 | len = min_t(unsigned int, sizeof(sec), optlen); | |
1772 | if (copy_from_user((char *) &sec, optval, len)) { | |
1773 | err = -EFAULT; | |
1774 | break; | |
1775 | } | |
1776 | ||
1777 | if (sec.level < BT_SECURITY_LOW || | |
1778 | sec.level > BT_SECURITY_HIGH) { | |
1779 | err = -EINVAL; | |
1780 | break; | |
1781 | } | |
1782 | ||
1783 | l2cap_pi(sk)->sec_level = sec.level; | |
1784 | break; | |
1785 | ||
f66dc81f MH |
1786 | case BT_DEFER_SETUP: |
1787 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1788 | err = -EINVAL; | |
1789 | break; | |
1790 | } | |
1791 | ||
1792 | if (get_user(opt, (u32 __user *) optval)) { | |
1793 | err = -EFAULT; | |
1794 | break; | |
1795 | } | |
1796 | ||
1797 | bt_sk(sk)->defer_setup = opt; | |
1798 | break; | |
1799 | ||
d58daf42 MH |
1800 | default: |
1801 | err = -ENOPROTOOPT; | |
1802 | break; | |
1803 | } | |
1804 | ||
1805 | release_sock(sk); | |
1806 | return err; | |
1807 | } | |
1808 | ||
1809 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
1810 | { |
1811 | struct sock *sk = sock->sk; | |
1812 | struct l2cap_options opts; | |
1813 | struct l2cap_conninfo cinfo; | |
1814 | int len, err = 0; | |
2af6b9d5 | 1815 | u32 opt; |
1da177e4 LT |
1816 | |
1817 | BT_DBG("sk %p", sk); | |
1818 | ||
1819 | if (get_user(len, optlen)) | |
1820 | return -EFAULT; | |
1821 | ||
1822 | lock_sock(sk); | |
1823 | ||
1824 | switch (optname) { | |
1825 | case L2CAP_OPTIONS: | |
1826 | opts.imtu = l2cap_pi(sk)->imtu; | |
1827 | opts.omtu = l2cap_pi(sk)->omtu; | |
1828 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1829 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1830 | opts.fcs = l2cap_pi(sk)->fcs; |
1da177e4 LT |
1831 | |
1832 | len = min_t(unsigned int, len, sizeof(opts)); | |
1833 | if (copy_to_user(optval, (char *) &opts, len)) | |
1834 | err = -EFAULT; | |
1835 | ||
1836 | break; | |
1837 | ||
1838 | case L2CAP_LM: | |
2af6b9d5 MH |
1839 | switch (l2cap_pi(sk)->sec_level) { |
1840 | case BT_SECURITY_LOW: | |
1841 | opt = L2CAP_LM_AUTH; | |
1842 | break; | |
1843 | case BT_SECURITY_MEDIUM: | |
1844 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
1845 | break; | |
1846 | case BT_SECURITY_HIGH: | |
1847 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
1848 | L2CAP_LM_SECURE; | |
1849 | break; | |
1850 | default: | |
1851 | opt = 0; | |
1852 | break; | |
1853 | } | |
1854 | ||
1855 | if (l2cap_pi(sk)->role_switch) | |
1856 | opt |= L2CAP_LM_MASTER; | |
1857 | ||
1858 | if (l2cap_pi(sk)->force_reliable) | |
1859 | opt |= L2CAP_LM_RELIABLE; | |
1860 | ||
1861 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
1862 | err = -EFAULT; |
1863 | break; | |
1864 | ||
1865 | case L2CAP_CONNINFO: | |
f66dc81f MH |
1866 | if (sk->sk_state != BT_CONNECTED && |
1867 | !(sk->sk_state == BT_CONNECT2 && | |
1868 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
1869 | err = -ENOTCONN; |
1870 | break; | |
1871 | } | |
1872 | ||
1873 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
1874 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
1875 | ||
1876 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
1877 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
1878 | err = -EFAULT; | |
1879 | ||
1880 | break; | |
1881 | ||
1882 | default: | |
1883 | err = -ENOPROTOOPT; | |
1884 | break; | |
1885 | } | |
1886 | ||
1887 | release_sock(sk); | |
1888 | return err; | |
1889 | } | |
1890 | ||
d58daf42 MH |
1891 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
1892 | { | |
1893 | struct sock *sk = sock->sk; | |
2af6b9d5 | 1894 | struct bt_security sec; |
d58daf42 MH |
1895 | int len, err = 0; |
1896 | ||
1897 | BT_DBG("sk %p", sk); | |
1898 | ||
1899 | if (level == SOL_L2CAP) | |
1900 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
1901 | ||
0588d94f MH |
1902 | if (level != SOL_BLUETOOTH) |
1903 | return -ENOPROTOOPT; | |
1904 | ||
d58daf42 MH |
1905 | if (get_user(len, optlen)) |
1906 | return -EFAULT; | |
1907 | ||
1908 | lock_sock(sk); | |
1909 | ||
1910 | switch (optname) { | |
2af6b9d5 | 1911 | case BT_SECURITY: |
2526d3d8 | 1912 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1913 | err = -EINVAL; |
1914 | break; | |
1915 | } | |
1916 | ||
2af6b9d5 MH |
1917 | sec.level = l2cap_pi(sk)->sec_level; |
1918 | ||
1919 | len = min_t(unsigned int, len, sizeof(sec)); | |
1920 | if (copy_to_user(optval, (char *) &sec, len)) | |
1921 | err = -EFAULT; | |
1922 | ||
1923 | break; | |
1924 | ||
f66dc81f MH |
1925 | case BT_DEFER_SETUP: |
1926 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1927 | err = -EINVAL; | |
1928 | break; | |
1929 | } | |
1930 | ||
1931 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
1932 | err = -EFAULT; | |
1933 | ||
1934 | break; | |
1935 | ||
d58daf42 MH |
1936 | default: |
1937 | err = -ENOPROTOOPT; | |
1938 | break; | |
1939 | } | |
1940 | ||
1941 | release_sock(sk); | |
1942 | return err; | |
1943 | } | |
1944 | ||
1da177e4 LT |
1945 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1946 | { | |
1947 | struct sock *sk = sock->sk; | |
1948 | int err = 0; | |
1949 | ||
1950 | BT_DBG("sock %p, sk %p", sock, sk); | |
1951 | ||
1952 | if (!sk) | |
1953 | return 0; | |
1954 | ||
1955 | lock_sock(sk); | |
1956 | if (!sk->sk_shutdown) { | |
1957 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1958 | l2cap_sock_clear_timer(sk); | |
1959 | __l2cap_sock_close(sk, 0); | |
1960 | ||
1961 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
1962 | err = bt_sock_wait_state(sk, BT_CLOSED, |
1963 | sk->sk_lingertime); | |
1da177e4 LT |
1964 | } |
1965 | release_sock(sk); | |
1966 | return err; | |
1967 | } | |
1968 | ||
1969 | static int l2cap_sock_release(struct socket *sock) | |
1970 | { | |
1971 | struct sock *sk = sock->sk; | |
1972 | int err; | |
1973 | ||
1974 | BT_DBG("sock %p, sk %p", sock, sk); | |
1975 | ||
1976 | if (!sk) | |
1977 | return 0; | |
1978 | ||
1979 | err = l2cap_sock_shutdown(sock, 2); | |
1980 | ||
1981 | sock_orphan(sk); | |
1982 | l2cap_sock_kill(sk); | |
1983 | return err; | |
1984 | } | |
1985 | ||
1da177e4 LT |
1986 | static void l2cap_chan_ready(struct sock *sk) |
1987 | { | |
1988 | struct sock *parent = bt_sk(sk)->parent; | |
1989 | ||
1990 | BT_DBG("sk %p, parent %p", sk, parent); | |
1991 | ||
1992 | l2cap_pi(sk)->conf_state = 0; | |
1993 | l2cap_sock_clear_timer(sk); | |
1994 | ||
1995 | if (!parent) { | |
1996 | /* Outgoing channel. | |
1997 | * Wake up socket sleeping on connect. | |
1998 | */ | |
1999 | sk->sk_state = BT_CONNECTED; | |
2000 | sk->sk_state_change(sk); | |
2001 | } else { | |
2002 | /* Incoming channel. | |
2003 | * Wake up socket sleeping on accept. | |
2004 | */ | |
2005 | parent->sk_data_ready(parent, 0); | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | /* Copy frame to all raw sockets on that connection */ | |
2010 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
2011 | { | |
2012 | struct l2cap_chan_list *l = &conn->chan_list; | |
2013 | struct sk_buff *nskb; | |
af05b30b | 2014 | struct sock *sk; |
1da177e4 LT |
2015 | |
2016 | BT_DBG("conn %p", conn); | |
2017 | ||
2018 | read_lock(&l->lock); | |
2019 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2020 | if (sk->sk_type != SOCK_RAW) | |
2021 | continue; | |
2022 | ||
2023 | /* Don't send frame to the socket it came from */ | |
2024 | if (skb->sk == sk) | |
2025 | continue; | |
af05b30b GP |
2026 | nskb = skb_clone(skb, GFP_ATOMIC); |
2027 | if (!nskb) | |
1da177e4 LT |
2028 | continue; |
2029 | ||
2030 | if (sock_queue_rcv_skb(sk, nskb)) | |
2031 | kfree_skb(nskb); | |
2032 | } | |
2033 | read_unlock(&l->lock); | |
2034 | } | |
2035 | ||
2036 | /* ---- L2CAP signalling commands ---- */ | |
2037 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
2038 | u8 code, u8 ident, u16 dlen, void *data) | |
2039 | { | |
2040 | struct sk_buff *skb, **frag; | |
2041 | struct l2cap_cmd_hdr *cmd; | |
2042 | struct l2cap_hdr *lh; | |
2043 | int len, count; | |
2044 | ||
af05b30b GP |
2045 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
2046 | conn, code, ident, dlen); | |
1da177e4 LT |
2047 | |
2048 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
2049 | count = min_t(unsigned int, conn->mtu, len); | |
2050 | ||
2051 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
2052 | if (!skb) | |
2053 | return NULL; | |
2054 | ||
2055 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c | 2056 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
8db4dc46 | 2057 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
1da177e4 LT |
2058 | |
2059 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
2060 | cmd->code = code; | |
2061 | cmd->ident = ident; | |
aca3192c | 2062 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
2063 | |
2064 | if (dlen) { | |
2065 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
2066 | memcpy(skb_put(skb, count), data, count); | |
2067 | data += count; | |
2068 | } | |
2069 | ||
2070 | len -= skb->len; | |
2071 | ||
2072 | /* Continuation fragments (no L2CAP header) */ | |
2073 | frag = &skb_shinfo(skb)->frag_list; | |
2074 | while (len) { | |
2075 | count = min_t(unsigned int, conn->mtu, len); | |
2076 | ||
2077 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
2078 | if (!*frag) | |
2079 | goto fail; | |
2080 | ||
2081 | memcpy(skb_put(*frag, count), data, count); | |
2082 | ||
2083 | len -= count; | |
2084 | data += count; | |
2085 | ||
2086 | frag = &(*frag)->next; | |
2087 | } | |
2088 | ||
2089 | return skb; | |
2090 | ||
2091 | fail: | |
2092 | kfree_skb(skb); | |
2093 | return NULL; | |
2094 | } | |
2095 | ||
2096 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
2097 | { | |
2098 | struct l2cap_conf_opt *opt = *ptr; | |
2099 | int len; | |
2100 | ||
2101 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
2102 | *ptr += len; | |
2103 | ||
2104 | *type = opt->type; | |
2105 | *olen = opt->len; | |
2106 | ||
2107 | switch (opt->len) { | |
2108 | case 1: | |
2109 | *val = *((u8 *) opt->val); | |
2110 | break; | |
2111 | ||
2112 | case 2: | |
861d6882 | 2113 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
2114 | break; |
2115 | ||
2116 | case 4: | |
861d6882 | 2117 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
2118 | break; |
2119 | ||
2120 | default: | |
2121 | *val = (unsigned long) opt->val; | |
2122 | break; | |
2123 | } | |
2124 | ||
2125 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
2126 | return len; | |
2127 | } | |
2128 | ||
1da177e4 LT |
2129 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
2130 | { | |
2131 | struct l2cap_conf_opt *opt = *ptr; | |
2132 | ||
2133 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
2134 | ||
2135 | opt->type = type; | |
2136 | opt->len = len; | |
2137 | ||
2138 | switch (len) { | |
2139 | case 1: | |
2140 | *((u8 *) opt->val) = val; | |
2141 | break; | |
2142 | ||
2143 | case 2: | |
8e036fc3 | 2144 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
2145 | break; |
2146 | ||
2147 | case 4: | |
8e036fc3 | 2148 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
2149 | break; |
2150 | ||
2151 | default: | |
2152 | memcpy(opt->val, (void *) val, len); | |
2153 | break; | |
2154 | } | |
2155 | ||
2156 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
2157 | } | |
2158 | ||
f2fcfcd6 GP |
2159 | static int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
2160 | { | |
2161 | u32 local_feat_mask = l2cap_feat_mask; | |
2162 | if (enable_ertm) | |
6840ed07 | 2163 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
f2fcfcd6 GP |
2164 | |
2165 | switch (mode) { | |
2166 | case L2CAP_MODE_ERTM: | |
2167 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; | |
2168 | case L2CAP_MODE_STREAMING: | |
2169 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; | |
2170 | default: | |
2171 | return 0x00; | |
2172 | } | |
2173 | } | |
2174 | ||
2175 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) | |
2176 | { | |
2177 | switch (mode) { | |
2178 | case L2CAP_MODE_STREAMING: | |
2179 | case L2CAP_MODE_ERTM: | |
2180 | if (l2cap_mode_supported(mode, remote_feat_mask)) | |
2181 | return mode; | |
2182 | /* fall through */ | |
2183 | default: | |
2184 | return L2CAP_MODE_BASIC; | |
2185 | } | |
2186 | } | |
2187 | ||
1da177e4 LT |
2188 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
2189 | { | |
2190 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2191 | struct l2cap_conf_req *req = data; | |
f2fcfcd6 | 2192 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_ERTM }; |
1da177e4 LT |
2193 | void *ptr = req->data; |
2194 | ||
2195 | BT_DBG("sk %p", sk); | |
2196 | ||
f2fcfcd6 GP |
2197 | if (pi->num_conf_req || pi->num_conf_rsp) |
2198 | goto done; | |
2199 | ||
2200 | switch (pi->mode) { | |
2201 | case L2CAP_MODE_STREAMING: | |
2202 | case L2CAP_MODE_ERTM: | |
2203 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; | |
22121fc9 GP |
2204 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) |
2205 | l2cap_send_disconn_req(pi->conn, sk); | |
f2fcfcd6 GP |
2206 | break; |
2207 | default: | |
2208 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2209 | break; | |
2210 | } | |
2211 | ||
2212 | done: | |
65c7c491 MH |
2213 | switch (pi->mode) { |
2214 | case L2CAP_MODE_BASIC: | |
2215 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
2216 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
2217 | break; | |
2218 | ||
2219 | case L2CAP_MODE_ERTM: | |
2220 | rfc.mode = L2CAP_MODE_ERTM; | |
f2fcfcd6 | 2221 | rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW; |
e90bac06 | 2222 | rfc.max_transmit = L2CAP_DEFAULT_MAX_TX; |
f2fcfcd6 GP |
2223 | rfc.retrans_timeout = 0; |
2224 | rfc.monitor_timeout = 0; | |
c74e560c | 2225 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
f2fcfcd6 GP |
2226 | |
2227 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2228 | sizeof(rfc), (unsigned long) &rfc); | |
fcc203c3 GP |
2229 | |
2230 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) | |
2231 | break; | |
2232 | ||
2233 | if (pi->fcs == L2CAP_FCS_NONE || | |
2234 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2235 | pi->fcs = L2CAP_FCS_NONE; | |
2236 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2237 | } | |
f2fcfcd6 GP |
2238 | break; |
2239 | ||
2240 | case L2CAP_MODE_STREAMING: | |
2241 | rfc.mode = L2CAP_MODE_STREAMING; | |
2242 | rfc.txwin_size = 0; | |
2243 | rfc.max_transmit = 0; | |
2244 | rfc.retrans_timeout = 0; | |
2245 | rfc.monitor_timeout = 0; | |
c74e560c | 2246 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
65c7c491 MH |
2247 | |
2248 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2249 | sizeof(rfc), (unsigned long) &rfc); | |
fcc203c3 GP |
2250 | |
2251 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) | |
2252 | break; | |
2253 | ||
2254 | if (pi->fcs == L2CAP_FCS_NONE || | |
2255 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2256 | pi->fcs = L2CAP_FCS_NONE; | |
2257 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2258 | } | |
65c7c491 MH |
2259 | break; |
2260 | } | |
1da177e4 LT |
2261 | |
2262 | /* FIXME: Need actual value of the flush timeout */ | |
2263 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
2264 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
2265 | ||
aca3192c YH |
2266 | req->dcid = cpu_to_le16(pi->dcid); |
2267 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
2268 | |
2269 | return ptr - data; | |
2270 | } | |
2271 | ||
5dee9e7c | 2272 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
2273 | { |
2274 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
2275 | struct l2cap_conf_rsp *rsp = data; |
2276 | void *ptr = rsp->data; | |
2277 | void *req = pi->conf_req; | |
2278 | int len = pi->conf_len; | |
2279 | int type, hint, olen; | |
2280 | unsigned long val; | |
6464f35f | 2281 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 2282 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 2283 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 2284 | |
5dee9e7c | 2285 | BT_DBG("sk %p", sk); |
820ae1b8 | 2286 | |
5dee9e7c MH |
2287 | while (len >= L2CAP_CONF_OPT_SIZE) { |
2288 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 2289 | |
589d2746 | 2290 | hint = type & L2CAP_CONF_HINT; |
47ec1dcd | 2291 | type &= L2CAP_CONF_MASK; |
5dee9e7c MH |
2292 | |
2293 | switch (type) { | |
2294 | case L2CAP_CONF_MTU: | |
861d6882 | 2295 | mtu = val; |
5dee9e7c MH |
2296 | break; |
2297 | ||
2298 | case L2CAP_CONF_FLUSH_TO: | |
2299 | pi->flush_to = val; | |
2300 | break; | |
2301 | ||
2302 | case L2CAP_CONF_QOS: | |
2303 | break; | |
2304 | ||
6464f35f MH |
2305 | case L2CAP_CONF_RFC: |
2306 | if (olen == sizeof(rfc)) | |
2307 | memcpy(&rfc, (void *) val, olen); | |
2308 | break; | |
2309 | ||
fcc203c3 GP |
2310 | case L2CAP_CONF_FCS: |
2311 | if (val == L2CAP_FCS_NONE) | |
2312 | pi->conf_state |= L2CAP_CONF_NO_FCS_RECV; | |
2313 | ||
2314 | break; | |
2315 | ||
5dee9e7c MH |
2316 | default: |
2317 | if (hint) | |
2318 | break; | |
2319 | ||
2320 | result = L2CAP_CONF_UNKNOWN; | |
2321 | *((u8 *) ptr++) = type; | |
2322 | break; | |
2323 | } | |
2324 | } | |
2325 | ||
f2fcfcd6 GP |
2326 | if (pi->num_conf_rsp || pi->num_conf_req) |
2327 | goto done; | |
2328 | ||
2329 | switch (pi->mode) { | |
2330 | case L2CAP_MODE_STREAMING: | |
2331 | case L2CAP_MODE_ERTM: | |
2332 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; | |
2333 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) | |
2334 | return -ECONNREFUSED; | |
2335 | break; | |
2336 | default: | |
2337 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2338 | break; | |
2339 | } | |
2340 | ||
2341 | done: | |
2342 | if (pi->mode != rfc.mode) { | |
2343 | result = L2CAP_CONF_UNACCEPT; | |
2344 | rfc.mode = pi->mode; | |
2345 | ||
2346 | if (pi->num_conf_rsp == 1) | |
2347 | return -ECONNREFUSED; | |
2348 | ||
2349 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2350 | sizeof(rfc), (unsigned long) &rfc); | |
2351 | } | |
2352 | ||
2353 | ||
5dee9e7c MH |
2354 | if (result == L2CAP_CONF_SUCCESS) { |
2355 | /* Configure output options and let the other side know | |
2356 | * which ones we don't like. */ | |
2357 | ||
f2fcfcd6 GP |
2358 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
2359 | result = L2CAP_CONF_UNACCEPT; | |
2360 | else { | |
2361 | pi->omtu = mtu; | |
2362 | pi->conf_state |= L2CAP_CONF_MTU_DONE; | |
2363 | } | |
2364 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
6464f35f | 2365 | |
f2fcfcd6 GP |
2366 | switch (rfc.mode) { |
2367 | case L2CAP_MODE_BASIC: | |
2368 | pi->fcs = L2CAP_FCS_NONE; | |
2369 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
2370 | break; | |
2371 | ||
2372 | case L2CAP_MODE_ERTM: | |
2373 | pi->remote_tx_win = rfc.txwin_size; | |
2374 | pi->remote_max_tx = rfc.max_transmit; | |
2375 | pi->max_pdu_size = rfc.max_pdu_size; | |
2376 | ||
2377 | rfc.retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; | |
2378 | rfc.monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; | |
2379 | ||
2380 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
2381 | break; | |
2382 | ||
2383 | case L2CAP_MODE_STREAMING: | |
2384 | pi->remote_tx_win = rfc.txwin_size; | |
2385 | pi->max_pdu_size = rfc.max_pdu_size; | |
2386 | ||
2387 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
2388 | break; | |
2389 | ||
2390 | default: | |
5dee9e7c | 2391 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 2392 | |
6464f35f | 2393 | memset(&rfc, 0, sizeof(rfc)); |
f2fcfcd6 GP |
2394 | rfc.mode = pi->mode; |
2395 | } | |
6464f35f | 2396 | |
f2fcfcd6 | 2397 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
65c7c491 | 2398 | sizeof(rfc), (unsigned long) &rfc); |
5dee9e7c | 2399 | |
f2fcfcd6 GP |
2400 | if (result == L2CAP_CONF_SUCCESS) |
2401 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
2402 | } | |
5dee9e7c MH |
2403 | rsp->scid = cpu_to_le16(pi->dcid); |
2404 | rsp->result = cpu_to_le16(result); | |
2405 | rsp->flags = cpu_to_le16(0x0000); | |
2406 | ||
2407 | return ptr - data; | |
1da177e4 LT |
2408 | } |
2409 | ||
f2fcfcd6 GP |
2410 | static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result) |
2411 | { | |
2412 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2413 | struct l2cap_conf_req *req = data; | |
2414 | void *ptr = req->data; | |
2415 | int type, olen; | |
2416 | unsigned long val; | |
2417 | struct l2cap_conf_rfc rfc; | |
2418 | ||
2419 | BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data); | |
2420 | ||
2421 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2422 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2423 | ||
2424 | switch (type) { | |
2425 | case L2CAP_CONF_MTU: | |
2426 | if (val < L2CAP_DEFAULT_MIN_MTU) { | |
2427 | *result = L2CAP_CONF_UNACCEPT; | |
2428 | pi->omtu = L2CAP_DEFAULT_MIN_MTU; | |
2429 | } else | |
2430 | pi->omtu = val; | |
2431 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
2432 | break; | |
2433 | ||
2434 | case L2CAP_CONF_FLUSH_TO: | |
2435 | pi->flush_to = val; | |
2436 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, | |
2437 | 2, pi->flush_to); | |
2438 | break; | |
2439 | ||
2440 | case L2CAP_CONF_RFC: | |
2441 | if (olen == sizeof(rfc)) | |
2442 | memcpy(&rfc, (void *)val, olen); | |
2443 | ||
2444 | if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) && | |
2445 | rfc.mode != pi->mode) | |
2446 | return -ECONNREFUSED; | |
2447 | ||
2448 | pi->mode = rfc.mode; | |
2449 | pi->fcs = 0; | |
2450 | ||
2451 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2452 | sizeof(rfc), (unsigned long) &rfc); | |
2453 | break; | |
2454 | } | |
2455 | } | |
2456 | ||
2457 | if (*result == L2CAP_CONF_SUCCESS) { | |
2458 | switch (rfc.mode) { | |
2459 | case L2CAP_MODE_ERTM: | |
2460 | pi->remote_tx_win = rfc.txwin_size; | |
2461 | pi->retrans_timeout = rfc.retrans_timeout; | |
2462 | pi->monitor_timeout = rfc.monitor_timeout; | |
2463 | pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size); | |
2464 | break; | |
2465 | case L2CAP_MODE_STREAMING: | |
2466 | pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size); | |
2467 | break; | |
2468 | } | |
2469 | } | |
2470 | ||
2471 | req->dcid = cpu_to_le16(pi->dcid); | |
2472 | req->flags = cpu_to_le16(0x0000); | |
2473 | ||
2474 | return ptr - data; | |
2475 | } | |
2476 | ||
5dee9e7c | 2477 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
2478 | { |
2479 | struct l2cap_conf_rsp *rsp = data; | |
2480 | void *ptr = rsp->data; | |
1da177e4 | 2481 | |
5dee9e7c | 2482 | BT_DBG("sk %p", sk); |
1da177e4 | 2483 | |
aca3192c | 2484 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 2485 | rsp->result = cpu_to_le16(result); |
aca3192c | 2486 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
2487 | |
2488 | return ptr - data; | |
2489 | } | |
2490 | ||
4e8402a3 MH |
2491 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2492 | { | |
2493 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
2494 | ||
2495 | if (rej->reason != 0x0000) | |
2496 | return 0; | |
2497 | ||
2498 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
2499 | cmd->ident == conn->info_ident) { | |
4e8402a3 | 2500 | del_timer(&conn->info_timer); |
984947dc MH |
2501 | |
2502 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
e1027a7c | 2503 | conn->info_ident = 0; |
984947dc | 2504 | |
4e8402a3 MH |
2505 | l2cap_conn_start(conn); |
2506 | } | |
2507 | ||
2508 | return 0; | |
2509 | } | |
2510 | ||
1da177e4 LT |
2511 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2512 | { | |
2513 | struct l2cap_chan_list *list = &conn->chan_list; | |
2514 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
2515 | struct l2cap_conn_rsp rsp; | |
2516 | struct sock *sk, *parent; | |
e7c29cb1 | 2517 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
2518 | |
2519 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 2520 | __le16 psm = req->psm; |
1da177e4 LT |
2521 | |
2522 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
2523 | ||
2524 | /* Check if we have socket listening on psm */ | |
2525 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
2526 | if (!parent) { | |
2527 | result = L2CAP_CR_BAD_PSM; | |
2528 | goto sendresp; | |
2529 | } | |
2530 | ||
e7c29cb1 MH |
2531 | /* Check if the ACL is secure enough (if not SDP) */ |
2532 | if (psm != cpu_to_le16(0x0001) && | |
2533 | !hci_conn_check_link_mode(conn->hcon)) { | |
2950f21a | 2534 | conn->disc_reason = 0x05; |
e7c29cb1 MH |
2535 | result = L2CAP_CR_SEC_BLOCK; |
2536 | goto response; | |
2537 | } | |
2538 | ||
1da177e4 LT |
2539 | result = L2CAP_CR_NO_MEM; |
2540 | ||
2541 | /* Check for backlog size */ | |
2542 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 2543 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
2544 | goto response; |
2545 | } | |
2546 | ||
3b1e0a65 | 2547 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
2548 | if (!sk) |
2549 | goto response; | |
2550 | ||
fd1278d7 | 2551 | write_lock_bh(&list->lock); |
1da177e4 LT |
2552 | |
2553 | /* Check if we already have channel with that dcid */ | |
2554 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 2555 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2556 | sock_set_flag(sk, SOCK_ZAPPED); |
2557 | l2cap_sock_kill(sk); | |
2558 | goto response; | |
2559 | } | |
2560 | ||
2561 | hci_conn_hold(conn->hcon); | |
2562 | ||
2563 | l2cap_sock_init(sk, parent); | |
2564 | bacpy(&bt_sk(sk)->src, conn->src); | |
2565 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
2566 | l2cap_pi(sk)->psm = psm; | |
2567 | l2cap_pi(sk)->dcid = scid; | |
2568 | ||
2569 | __l2cap_chan_add(conn, sk, parent); | |
2570 | dcid = l2cap_pi(sk)->scid; | |
2571 | ||
2572 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
2573 | ||
1da177e4 LT |
2574 | l2cap_pi(sk)->ident = cmd->ident; |
2575 | ||
984947dc | 2576 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
2af6b9d5 | 2577 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
2578 | if (bt_sk(sk)->defer_setup) { |
2579 | sk->sk_state = BT_CONNECT2; | |
2580 | result = L2CAP_CR_PEND; | |
2581 | status = L2CAP_CS_AUTHOR_PEND; | |
2582 | parent->sk_data_ready(parent, 0); | |
2583 | } else { | |
2584 | sk->sk_state = BT_CONFIG; | |
2585 | result = L2CAP_CR_SUCCESS; | |
2586 | status = L2CAP_CS_NO_INFO; | |
2587 | } | |
79d554a6 MH |
2588 | } else { |
2589 | sk->sk_state = BT_CONNECT2; | |
2590 | result = L2CAP_CR_PEND; | |
2591 | status = L2CAP_CS_AUTHEN_PEND; | |
2592 | } | |
2593 | } else { | |
2594 | sk->sk_state = BT_CONNECT2; | |
2595 | result = L2CAP_CR_PEND; | |
2596 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
2597 | } |
2598 | ||
fd1278d7 | 2599 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2600 | |
2601 | response: | |
2602 | bh_unlock_sock(parent); | |
2603 | ||
2604 | sendresp: | |
aca3192c YH |
2605 | rsp.scid = cpu_to_le16(scid); |
2606 | rsp.dcid = cpu_to_le16(dcid); | |
2607 | rsp.result = cpu_to_le16(result); | |
2608 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 2609 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
2610 | |
2611 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
2612 | struct l2cap_info_req info; | |
2613 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2614 | ||
2615 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
2616 | conn->info_ident = l2cap_get_ident(conn); | |
2617 | ||
2618 | mod_timer(&conn->info_timer, jiffies + | |
2619 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
2620 | ||
2621 | l2cap_send_cmd(conn, conn->info_ident, | |
2622 | L2CAP_INFO_REQ, sizeof(info), &info); | |
2623 | } | |
2624 | ||
1da177e4 LT |
2625 | return 0; |
2626 | } | |
2627 | ||
2628 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2629 | { | |
2630 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
2631 | u16 scid, dcid, result, status; | |
2632 | struct sock *sk; | |
2633 | u8 req[128]; | |
2634 | ||
2635 | scid = __le16_to_cpu(rsp->scid); | |
2636 | dcid = __le16_to_cpu(rsp->dcid); | |
2637 | result = __le16_to_cpu(rsp->result); | |
2638 | status = __le16_to_cpu(rsp->status); | |
2639 | ||
2640 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
2641 | ||
2642 | if (scid) { | |
af05b30b GP |
2643 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2644 | if (!sk) | |
1da177e4 LT |
2645 | return 0; |
2646 | } else { | |
af05b30b GP |
2647 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
2648 | if (!sk) | |
1da177e4 LT |
2649 | return 0; |
2650 | } | |
2651 | ||
2652 | switch (result) { | |
2653 | case L2CAP_CR_SUCCESS: | |
2654 | sk->sk_state = BT_CONFIG; | |
2655 | l2cap_pi(sk)->ident = 0; | |
2656 | l2cap_pi(sk)->dcid = dcid; | |
2657 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
2658 | ||
6a8d3010 MH |
2659 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
2660 | ||
1da177e4 LT |
2661 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
2662 | l2cap_build_conf_req(sk, req), req); | |
f2fcfcd6 | 2663 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
2664 | break; |
2665 | ||
2666 | case L2CAP_CR_PEND: | |
6a8d3010 | 2667 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 LT |
2668 | break; |
2669 | ||
2670 | default: | |
2671 | l2cap_chan_del(sk, ECONNREFUSED); | |
2672 | break; | |
2673 | } | |
2674 | ||
2675 | bh_unlock_sock(sk); | |
2676 | return 0; | |
2677 | } | |
2678 | ||
88219a0f | 2679 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
2680 | { |
2681 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
2682 | u16 dcid, flags; | |
2683 | u8 rsp[64]; | |
2684 | struct sock *sk; | |
5dee9e7c | 2685 | int len; |
1da177e4 LT |
2686 | |
2687 | dcid = __le16_to_cpu(req->dcid); | |
2688 | flags = __le16_to_cpu(req->flags); | |
2689 | ||
2690 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
2691 | ||
af05b30b GP |
2692 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
2693 | if (!sk) | |
1da177e4 LT |
2694 | return -ENOENT; |
2695 | ||
354f60a9 MH |
2696 | if (sk->sk_state == BT_DISCONN) |
2697 | goto unlock; | |
2698 | ||
5dee9e7c | 2699 | /* Reject if config buffer is too small. */ |
88219a0f | 2700 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
2701 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
2702 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
2703 | l2cap_build_conf_rsp(sk, rsp, | |
2704 | L2CAP_CONF_REJECT, flags), rsp); | |
2705 | goto unlock; | |
2706 | } | |
2707 | ||
2708 | /* Store config. */ | |
2709 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
2710 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
2711 | |
2712 | if (flags & 0x0001) { | |
2713 | /* Incomplete config. Send empty response. */ | |
2714 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
2715 | l2cap_build_conf_rsp(sk, rsp, |
2716 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
2717 | goto unlock; |
2718 | } | |
2719 | ||
2720 | /* Complete config. */ | |
5dee9e7c | 2721 | len = l2cap_parse_conf_req(sk, rsp); |
f2fcfcd6 | 2722 | if (len < 0) { |
22121fc9 | 2723 | l2cap_send_disconn_req(conn, sk); |
1da177e4 | 2724 | goto unlock; |
f2fcfcd6 | 2725 | } |
1da177e4 | 2726 | |
5dee9e7c | 2727 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
f2fcfcd6 | 2728 | l2cap_pi(sk)->num_conf_rsp++; |
5dee9e7c | 2729 | |
5dee9e7c MH |
2730 | /* Reset config buffer. */ |
2731 | l2cap_pi(sk)->conf_len = 0; | |
2732 | ||
876d9484 MH |
2733 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
2734 | goto unlock; | |
2735 | ||
1da177e4 | 2736 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
fcc203c3 GP |
2737 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) |
2738 | || l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
2739 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; | |
2740 | ||
1da177e4 | 2741 | sk->sk_state = BT_CONNECTED; |
1c2acffb GP |
2742 | l2cap_pi(sk)->next_tx_seq = 0; |
2743 | l2cap_pi(sk)->expected_ack_seq = 0; | |
2744 | l2cap_pi(sk)->unacked_frames = 0; | |
e90bac06 GP |
2745 | |
2746 | setup_timer(&l2cap_pi(sk)->retrans_timer, | |
2747 | l2cap_retrans_timeout, (unsigned long) sk); | |
2748 | setup_timer(&l2cap_pi(sk)->monitor_timer, | |
2749 | l2cap_monitor_timeout, (unsigned long) sk); | |
2750 | ||
1c2acffb | 2751 | __skb_queue_head_init(TX_QUEUE(sk)); |
8f17154f | 2752 | __skb_queue_head_init(SREJ_QUEUE(sk)); |
1da177e4 | 2753 | l2cap_chan_ready(sk); |
876d9484 MH |
2754 | goto unlock; |
2755 | } | |
2756 | ||
2757 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 2758 | u8 buf[64]; |
1da177e4 | 2759 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 2760 | l2cap_build_conf_req(sk, buf), buf); |
f2fcfcd6 | 2761 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
2762 | } |
2763 | ||
2764 | unlock: | |
2765 | bh_unlock_sock(sk); | |
2766 | return 0; | |
2767 | } | |
2768 | ||
2769 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2770 | { | |
2771 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
2772 | u16 scid, flags, result; | |
2773 | struct sock *sk; | |
2774 | ||
2775 | scid = __le16_to_cpu(rsp->scid); | |
2776 | flags = __le16_to_cpu(rsp->flags); | |
2777 | result = __le16_to_cpu(rsp->result); | |
2778 | ||
af05b30b GP |
2779 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
2780 | scid, flags, result); | |
1da177e4 | 2781 | |
af05b30b GP |
2782 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2783 | if (!sk) | |
1da177e4 LT |
2784 | return 0; |
2785 | ||
2786 | switch (result) { | |
2787 | case L2CAP_CONF_SUCCESS: | |
2788 | break; | |
2789 | ||
2790 | case L2CAP_CONF_UNACCEPT: | |
f2fcfcd6 GP |
2791 | if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
2792 | int len = cmd->len - sizeof(*rsp); | |
2793 | char req[64]; | |
2794 | ||
2795 | /* throw out any old stored conf requests */ | |
2796 | result = L2CAP_CONF_SUCCESS; | |
2797 | len = l2cap_parse_conf_rsp(sk, rsp->data, | |
2798 | len, req, &result); | |
2799 | if (len < 0) { | |
22121fc9 | 2800 | l2cap_send_disconn_req(conn, sk); |
f2fcfcd6 GP |
2801 | goto done; |
2802 | } | |
2803 | ||
2804 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
2805 | L2CAP_CONF_REQ, len, req); | |
2806 | l2cap_pi(sk)->num_conf_req++; | |
2807 | if (result != L2CAP_CONF_SUCCESS) | |
2808 | goto done; | |
2809 | break; | |
1da177e4 LT |
2810 | } |
2811 | ||
8e87d142 | 2812 | default: |
1da177e4 | 2813 | sk->sk_state = BT_DISCONN; |
b1235d79 | 2814 | sk->sk_err = ECONNRESET; |
1da177e4 | 2815 | l2cap_sock_set_timer(sk, HZ * 5); |
22121fc9 | 2816 | l2cap_send_disconn_req(conn, sk); |
1da177e4 LT |
2817 | goto done; |
2818 | } | |
2819 | ||
2820 | if (flags & 0x01) | |
2821 | goto done; | |
2822 | ||
1da177e4 LT |
2823 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
2824 | ||
2825 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
fcc203c3 GP |
2826 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) |
2827 | || l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
2828 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; | |
2829 | ||
1da177e4 | 2830 | sk->sk_state = BT_CONNECTED; |
1c2acffb | 2831 | l2cap_pi(sk)->expected_tx_seq = 0; |
8f17154f | 2832 | l2cap_pi(sk)->buffer_seq = 0; |
1c2acffb GP |
2833 | l2cap_pi(sk)->num_to_ack = 0; |
2834 | __skb_queue_head_init(TX_QUEUE(sk)); | |
8f17154f | 2835 | __skb_queue_head_init(SREJ_QUEUE(sk)); |
1da177e4 LT |
2836 | l2cap_chan_ready(sk); |
2837 | } | |
2838 | ||
2839 | done: | |
2840 | bh_unlock_sock(sk); | |
2841 | return 0; | |
2842 | } | |
2843 | ||
2844 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2845 | { | |
2846 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
2847 | struct l2cap_disconn_rsp rsp; | |
2848 | u16 dcid, scid; | |
2849 | struct sock *sk; | |
2850 | ||
2851 | scid = __le16_to_cpu(req->scid); | |
2852 | dcid = __le16_to_cpu(req->dcid); | |
2853 | ||
2854 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
2855 | ||
af05b30b GP |
2856 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
2857 | if (!sk) | |
1da177e4 LT |
2858 | return 0; |
2859 | ||
aca3192c YH |
2860 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
2861 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
2862 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
2863 | ||
2864 | sk->sk_shutdown = SHUTDOWN_MASK; | |
2865 | ||
1c2acffb | 2866 | skb_queue_purge(TX_QUEUE(sk)); |
8f17154f | 2867 | skb_queue_purge(SREJ_QUEUE(sk)); |
e90bac06 GP |
2868 | del_timer(&l2cap_pi(sk)->retrans_timer); |
2869 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
1c2acffb | 2870 | |
1da177e4 LT |
2871 | l2cap_chan_del(sk, ECONNRESET); |
2872 | bh_unlock_sock(sk); | |
2873 | ||
2874 | l2cap_sock_kill(sk); | |
2875 | return 0; | |
2876 | } | |
2877 | ||
2878 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2879 | { | |
2880 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
2881 | u16 dcid, scid; | |
2882 | struct sock *sk; | |
2883 | ||
2884 | scid = __le16_to_cpu(rsp->scid); | |
2885 | dcid = __le16_to_cpu(rsp->dcid); | |
2886 | ||
2887 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
2888 | ||
af05b30b GP |
2889 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2890 | if (!sk) | |
1da177e4 LT |
2891 | return 0; |
2892 | ||
1c2acffb | 2893 | skb_queue_purge(TX_QUEUE(sk)); |
8f17154f | 2894 | skb_queue_purge(SREJ_QUEUE(sk)); |
e90bac06 GP |
2895 | del_timer(&l2cap_pi(sk)->retrans_timer); |
2896 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
1c2acffb | 2897 | |
1da177e4 LT |
2898 | l2cap_chan_del(sk, 0); |
2899 | bh_unlock_sock(sk); | |
2900 | ||
2901 | l2cap_sock_kill(sk); | |
2902 | return 0; | |
2903 | } | |
2904 | ||
2905 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2906 | { | |
2907 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
2908 | u16 type; |
2909 | ||
2910 | type = __le16_to_cpu(req->type); | |
2911 | ||
2912 | BT_DBG("type 0x%4.4x", type); | |
2913 | ||
f0709e03 MH |
2914 | if (type == L2CAP_IT_FEAT_MASK) { |
2915 | u8 buf[8]; | |
44dd46de | 2916 | u32 feat_mask = l2cap_feat_mask; |
f0709e03 MH |
2917 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
2918 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2919 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
44dd46de | 2920 | if (enable_ertm) |
fcc203c3 GP |
2921 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
2922 | | L2CAP_FEAT_FCS; | |
44dd46de | 2923 | put_unaligned(cpu_to_le32(feat_mask), (__le32 *) rsp->data); |
f0709e03 MH |
2924 | l2cap_send_cmd(conn, cmd->ident, |
2925 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
e1027a7c MH |
2926 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
2927 | u8 buf[12]; | |
2928 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
2929 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
2930 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
2931 | memcpy(buf + 4, l2cap_fixed_chan, 8); | |
2932 | l2cap_send_cmd(conn, cmd->ident, | |
2933 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
f0709e03 MH |
2934 | } else { |
2935 | struct l2cap_info_rsp rsp; | |
2936 | rsp.type = cpu_to_le16(type); | |
2937 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
2938 | l2cap_send_cmd(conn, cmd->ident, | |
2939 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
2940 | } | |
1da177e4 LT |
2941 | |
2942 | return 0; | |
2943 | } | |
2944 | ||
2945 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2946 | { | |
2947 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
2948 | u16 type, result; | |
2949 | ||
2950 | type = __le16_to_cpu(rsp->type); | |
2951 | result = __le16_to_cpu(rsp->result); | |
2952 | ||
2953 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
2954 | ||
4e8402a3 MH |
2955 | del_timer(&conn->info_timer); |
2956 | ||
984947dc | 2957 | if (type == L2CAP_IT_FEAT_MASK) { |
83985319 | 2958 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 | 2959 | |
47ec1dcd | 2960 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
e1027a7c MH |
2961 | struct l2cap_info_req req; |
2962 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
2963 | ||
2964 | conn->info_ident = l2cap_get_ident(conn); | |
2965 | ||
2966 | l2cap_send_cmd(conn, conn->info_ident, | |
2967 | L2CAP_INFO_REQ, sizeof(req), &req); | |
2968 | } else { | |
2969 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
2970 | conn->info_ident = 0; | |
2971 | ||
2972 | l2cap_conn_start(conn); | |
2973 | } | |
2974 | } else if (type == L2CAP_IT_FIXED_CHAN) { | |
984947dc | 2975 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 2976 | conn->info_ident = 0; |
984947dc MH |
2977 | |
2978 | l2cap_conn_start(conn); | |
2979 | } | |
4e8402a3 | 2980 | |
1da177e4 LT |
2981 | return 0; |
2982 | } | |
2983 | ||
2984 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
2985 | { | |
2986 | u8 *data = skb->data; | |
2987 | int len = skb->len; | |
2988 | struct l2cap_cmd_hdr cmd; | |
2989 | int err = 0; | |
2990 | ||
2991 | l2cap_raw_recv(conn, skb); | |
2992 | ||
2993 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 2994 | u16 cmd_len; |
1da177e4 LT |
2995 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
2996 | data += L2CAP_CMD_HDR_SIZE; | |
2997 | len -= L2CAP_CMD_HDR_SIZE; | |
2998 | ||
88219a0f | 2999 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 3000 | |
88219a0f | 3001 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 3002 | |
88219a0f | 3003 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
3004 | BT_DBG("corrupted command"); |
3005 | break; | |
3006 | } | |
3007 | ||
3008 | switch (cmd.code) { | |
3009 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 3010 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
3011 | break; |
3012 | ||
3013 | case L2CAP_CONN_REQ: | |
3014 | err = l2cap_connect_req(conn, &cmd, data); | |
3015 | break; | |
3016 | ||
3017 | case L2CAP_CONN_RSP: | |
3018 | err = l2cap_connect_rsp(conn, &cmd, data); | |
3019 | break; | |
3020 | ||
3021 | case L2CAP_CONF_REQ: | |
88219a0f | 3022 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
3023 | break; |
3024 | ||
3025 | case L2CAP_CONF_RSP: | |
3026 | err = l2cap_config_rsp(conn, &cmd, data); | |
3027 | break; | |
3028 | ||
3029 | case L2CAP_DISCONN_REQ: | |
3030 | err = l2cap_disconnect_req(conn, &cmd, data); | |
3031 | break; | |
3032 | ||
3033 | case L2CAP_DISCONN_RSP: | |
3034 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
3035 | break; | |
3036 | ||
3037 | case L2CAP_ECHO_REQ: | |
88219a0f | 3038 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
3039 | break; |
3040 | ||
3041 | case L2CAP_ECHO_RSP: | |
3042 | break; | |
3043 | ||
3044 | case L2CAP_INFO_REQ: | |
3045 | err = l2cap_information_req(conn, &cmd, data); | |
3046 | break; | |
3047 | ||
3048 | case L2CAP_INFO_RSP: | |
3049 | err = l2cap_information_rsp(conn, &cmd, data); | |
3050 | break; | |
3051 | ||
3052 | default: | |
3053 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
3054 | err = -EINVAL; | |
3055 | break; | |
3056 | } | |
3057 | ||
3058 | if (err) { | |
3059 | struct l2cap_cmd_rej rej; | |
3060 | BT_DBG("error %d", err); | |
3061 | ||
3062 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 3063 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
3064 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
3065 | } | |
3066 | ||
88219a0f AV |
3067 | data += cmd_len; |
3068 | len -= cmd_len; | |
1da177e4 LT |
3069 | } |
3070 | ||
3071 | kfree_skb(skb); | |
3072 | } | |
3073 | ||
fcc203c3 GP |
3074 | static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb) |
3075 | { | |
3076 | u16 our_fcs, rcv_fcs; | |
3077 | int hdr_size = L2CAP_HDR_SIZE + 2; | |
3078 | ||
3079 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
3080 | skb_trim(skb, skb->len - 2); | |
3081 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); | |
3082 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); | |
3083 | ||
3084 | if (our_fcs != rcv_fcs) | |
3085 | return -EINVAL; | |
3086 | } | |
3087 | return 0; | |
3088 | } | |
3089 | ||
8f17154f GP |
3090 | static void l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar) |
3091 | { | |
3092 | struct sk_buff *next_skb; | |
3093 | ||
3094 | bt_cb(skb)->tx_seq = tx_seq; | |
3095 | bt_cb(skb)->sar = sar; | |
3096 | ||
3097 | next_skb = skb_peek(SREJ_QUEUE(sk)); | |
3098 | if (!next_skb) { | |
3099 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
3100 | return; | |
3101 | } | |
3102 | ||
3103 | do { | |
3104 | if (bt_cb(next_skb)->tx_seq > tx_seq) { | |
3105 | __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb); | |
3106 | return; | |
3107 | } | |
3108 | ||
3109 | if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb)) | |
3110 | break; | |
3111 | ||
3112 | } while((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb))); | |
3113 | ||
3114 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
3115 | } | |
3116 | ||
c74e560c GP |
3117 | static int l2cap_sar_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
3118 | { | |
3119 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3120 | struct sk_buff *_skb; | |
3121 | int err = -EINVAL; | |
3122 | ||
3123 | switch (control & L2CAP_CTRL_SAR) { | |
3124 | case L2CAP_SDU_UNSEGMENTED: | |
3125 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3126 | kfree_skb(pi->sdu); | |
3127 | break; | |
3128 | } | |
3129 | ||
3130 | err = sock_queue_rcv_skb(sk, skb); | |
3131 | if (!err) | |
3132 | return 0; | |
3133 | ||
3134 | break; | |
3135 | ||
3136 | case L2CAP_SDU_START: | |
3137 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3138 | kfree_skb(pi->sdu); | |
3139 | break; | |
3140 | } | |
3141 | ||
3142 | pi->sdu_len = get_unaligned_le16(skb->data); | |
3143 | skb_pull(skb, 2); | |
3144 | ||
3145 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); | |
3146 | if (!pi->sdu) { | |
3147 | err = -ENOMEM; | |
3148 | break; | |
3149 | } | |
3150 | ||
3151 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3152 | ||
3153 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3154 | pi->partial_sdu_len = skb->len; | |
3155 | err = 0; | |
3156 | break; | |
3157 | ||
3158 | case L2CAP_SDU_CONTINUE: | |
3159 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3160 | break; | |
3161 | ||
3162 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3163 | ||
3164 | pi->partial_sdu_len += skb->len; | |
3165 | if (pi->partial_sdu_len > pi->sdu_len) | |
3166 | kfree_skb(pi->sdu); | |
3167 | else | |
3168 | err = 0; | |
3169 | ||
3170 | break; | |
3171 | ||
3172 | case L2CAP_SDU_END: | |
3173 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3174 | break; | |
3175 | ||
3176 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3177 | ||
3178 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
3179 | pi->partial_sdu_len += skb->len; | |
3180 | ||
3181 | if (pi->partial_sdu_len == pi->sdu_len) { | |
3182 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
3183 | err = sock_queue_rcv_skb(sk, _skb); | |
3184 | if (err < 0) | |
3185 | kfree_skb(_skb); | |
3186 | } | |
3187 | kfree_skb(pi->sdu); | |
3188 | err = 0; | |
3189 | ||
3190 | break; | |
3191 | } | |
3192 | ||
3193 | kfree_skb(skb); | |
3194 | return err; | |
3195 | } | |
3196 | ||
8f17154f GP |
3197 | static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq) |
3198 | { | |
3199 | struct sk_buff *skb; | |
3200 | u16 control = 0; | |
3201 | ||
3202 | while((skb = skb_peek(SREJ_QUEUE(sk)))) { | |
3203 | if (bt_cb(skb)->tx_seq != tx_seq) | |
3204 | break; | |
3205 | ||
3206 | skb = skb_dequeue(SREJ_QUEUE(sk)); | |
3207 | control |= bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; | |
3208 | l2cap_sar_reassembly_sdu(sk, skb, control); | |
3209 | l2cap_pi(sk)->buffer_seq_srej = | |
3210 | (l2cap_pi(sk)->buffer_seq_srej + 1) % 64; | |
3211 | tx_seq++; | |
3212 | } | |
3213 | } | |
3214 | ||
3215 | static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq) | |
3216 | { | |
3217 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3218 | struct srej_list *l, *tmp; | |
3219 | u16 control; | |
3220 | ||
3221 | list_for_each_entry_safe(l,tmp, SREJ_LIST(sk), list) { | |
3222 | if (l->tx_seq == tx_seq) { | |
3223 | list_del(&l->list); | |
3224 | kfree(l); | |
3225 | return; | |
3226 | } | |
3227 | control = L2CAP_SUPER_SELECT_REJECT; | |
3228 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3229 | l2cap_send_sframe(pi, control); | |
3230 | list_del(&l->list); | |
3231 | list_add_tail(&l->list, SREJ_LIST(sk)); | |
3232 | } | |
3233 | } | |
3234 | ||
3235 | static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) | |
3236 | { | |
3237 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3238 | struct srej_list *new; | |
3239 | u16 control; | |
3240 | ||
3241 | while (tx_seq != pi->expected_tx_seq) { | |
3242 | control = L2CAP_SUPER_SELECT_REJECT; | |
3243 | control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
ef54fd93 GP |
3244 | if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { |
3245 | control |= L2CAP_CTRL_POLL; | |
3246 | pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; | |
3247 | } | |
8f17154f GP |
3248 | l2cap_send_sframe(pi, control); |
3249 | ||
3250 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); | |
3251 | new->tx_seq = pi->expected_tx_seq++; | |
3252 | list_add_tail(&new->list, SREJ_LIST(sk)); | |
3253 | } | |
3254 | pi->expected_tx_seq++; | |
3255 | } | |
3256 | ||
1c2acffb GP |
3257 | static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
3258 | { | |
3259 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3260 | u8 tx_seq = __get_txseq(rx_control); | |
3261 | u16 tx_control = 0; | |
8f17154f | 3262 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
1c2acffb GP |
3263 | int err = 0; |
3264 | ||
3265 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
3266 | ||
8f17154f GP |
3267 | if (tx_seq == pi->expected_tx_seq) |
3268 | goto expected; | |
1c2acffb | 3269 | |
8f17154f GP |
3270 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
3271 | struct srej_list *first; | |
30afb5b2 | 3272 | |
8f17154f GP |
3273 | first = list_first_entry(SREJ_LIST(sk), |
3274 | struct srej_list, list); | |
3275 | if (tx_seq == first->tx_seq) { | |
3276 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3277 | l2cap_check_srej_gap(sk, tx_seq); | |
3278 | ||
3279 | list_del(&first->list); | |
3280 | kfree(first); | |
3281 | ||
3282 | if (list_empty(SREJ_LIST(sk))) { | |
3283 | pi->buffer_seq = pi->buffer_seq_srej; | |
3284 | pi->conn_state &= ~L2CAP_CONN_SREJ_SENT; | |
3285 | } | |
3286 | } else { | |
3287 | struct srej_list *l; | |
3288 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3289 | ||
3290 | list_for_each_entry(l, SREJ_LIST(sk), list) { | |
3291 | if (l->tx_seq == tx_seq) { | |
3292 | l2cap_resend_srejframe(sk, tx_seq); | |
3293 | return 0; | |
3294 | } | |
3295 | } | |
3296 | l2cap_send_srejframe(sk, tx_seq); | |
30afb5b2 GP |
3297 | } |
3298 | } else { | |
8f17154f | 3299 | pi->conn_state |= L2CAP_CONN_SREJ_SENT; |
1c2acffb | 3300 | |
8f17154f GP |
3301 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
3302 | pi->buffer_seq_srej = pi->buffer_seq; | |
3303 | ||
3304 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
3305 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3306 | ||
ef54fd93 GP |
3307 | pi->conn_state |= L2CAP_CONN_SEND_PBIT; |
3308 | ||
8f17154f | 3309 | l2cap_send_srejframe(sk, tx_seq); |
1c2acffb | 3310 | } |
30afb5b2 GP |
3311 | return 0; |
3312 | ||
8f17154f GP |
3313 | expected: |
3314 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
3315 | ||
3316 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { | |
3317 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3318 | return 0; | |
3319 | } | |
3320 | ||
3321 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; | |
3322 | ||
3323 | err = l2cap_sar_reassembly_sdu(sk, skb, rx_control); | |
3324 | if (err < 0) | |
3325 | return err; | |
3326 | ||
3327 | pi->num_to_ack = (pi->num_to_ack + 1) % L2CAP_DEFAULT_NUM_TO_ACK; | |
3328 | if (pi->num_to_ack == L2CAP_DEFAULT_NUM_TO_ACK - 1) { | |
3329 | tx_control |= L2CAP_SUPER_RCV_READY; | |
3330 | tx_control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3331 | l2cap_send_sframe(pi, tx_control); | |
3332 | } | |
3333 | return 0; | |
1c2acffb GP |
3334 | } |
3335 | ||
3336 | static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) | |
3337 | { | |
3338 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
8f17154f | 3339 | u8 tx_seq = __get_reqseq(rx_control); |
1c2acffb GP |
3340 | |
3341 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
3342 | ||
3343 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { | |
3344 | case L2CAP_SUPER_RCV_READY: | |
e90bac06 GP |
3345 | if (rx_control & L2CAP_CTRL_POLL) { |
3346 | u16 control = L2CAP_CTRL_FINAL; | |
3347 | control |= L2CAP_SUPER_RCV_READY; | |
3348 | l2cap_send_sframe(l2cap_pi(sk), control); | |
3349 | } else if (rx_control & L2CAP_CTRL_FINAL) { | |
3350 | if (!(pi->conn_state & L2CAP_CONN_WAIT_F)) | |
3351 | break; | |
3352 | ||
3353 | pi->conn_state &= ~L2CAP_CONN_WAIT_F; | |
3354 | del_timer(&pi->monitor_timer); | |
3355 | ||
3356 | if (pi->unacked_frames > 0) | |
3357 | __mod_retrans_timer(); | |
3358 | } else { | |
8f17154f | 3359 | pi->expected_ack_seq = tx_seq; |
e90bac06 GP |
3360 | l2cap_drop_acked_frames(sk); |
3361 | if (pi->unacked_frames > 0) | |
3362 | __mod_retrans_timer(); | |
3363 | l2cap_ertm_send(sk); | |
3364 | } | |
1c2acffb GP |
3365 | break; |
3366 | ||
1c2acffb | 3367 | case L2CAP_SUPER_REJECT: |
30afb5b2 GP |
3368 | pi->expected_ack_seq = __get_reqseq(rx_control); |
3369 | l2cap_drop_acked_frames(sk); | |
3370 | ||
3371 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
3372 | pi->next_tx_seq = pi->expected_ack_seq; | |
3373 | ||
3374 | l2cap_ertm_send(sk); | |
3375 | ||
3376 | break; | |
3377 | ||
1c2acffb | 3378 | case L2CAP_SUPER_SELECT_REJECT: |
ef54fd93 GP |
3379 | if (rx_control & L2CAP_CTRL_POLL) { |
3380 | l2cap_retransmit_frame(sk, tx_seq); | |
3381 | pi->expected_ack_seq = tx_seq; | |
3382 | l2cap_drop_acked_frames(sk); | |
3383 | l2cap_ertm_send(sk); | |
3384 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { | |
3385 | pi->srej_save_reqseq = tx_seq; | |
3386 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
3387 | } | |
3388 | } else if (rx_control & L2CAP_CTRL_FINAL) { | |
3389 | if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && | |
3390 | pi->srej_save_reqseq == tx_seq) | |
3391 | pi->srej_save_reqseq &= ~L2CAP_CONN_SREJ_ACT; | |
3392 | else | |
3393 | l2cap_retransmit_frame(sk, tx_seq); | |
3394 | } | |
3395 | else { | |
3396 | l2cap_retransmit_frame(sk, tx_seq); | |
3397 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { | |
3398 | pi->srej_save_reqseq = tx_seq; | |
3399 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
3400 | } | |
3401 | } | |
8f17154f GP |
3402 | break; |
3403 | ||
3404 | case L2CAP_SUPER_RCV_NOT_READY: | |
1c2acffb GP |
3405 | break; |
3406 | } | |
3407 | ||
3408 | return 0; | |
3409 | } | |
3410 | ||
1da177e4 LT |
3411 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
3412 | { | |
3413 | struct sock *sk; | |
6840ed07 | 3414 | struct l2cap_pinfo *pi; |
c74e560c | 3415 | u16 control, len; |
6840ed07 | 3416 | u8 tx_seq; |
1c2acffb | 3417 | int err; |
1da177e4 LT |
3418 | |
3419 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
3420 | if (!sk) { | |
3421 | BT_DBG("unknown cid 0x%4.4x", cid); | |
3422 | goto drop; | |
3423 | } | |
3424 | ||
6840ed07 GP |
3425 | pi = l2cap_pi(sk); |
3426 | ||
1da177e4 LT |
3427 | BT_DBG("sk %p, len %d", sk, skb->len); |
3428 | ||
3429 | if (sk->sk_state != BT_CONNECTED) | |
3430 | goto drop; | |
3431 | ||
6840ed07 | 3432 | switch (pi->mode) { |
1c2acffb GP |
3433 | case L2CAP_MODE_BASIC: |
3434 | /* If socket recv buffers overflows we drop data here | |
3435 | * which is *bad* because L2CAP has to be reliable. | |
3436 | * But we don't have any other choice. L2CAP doesn't | |
3437 | * provide flow control mechanism. */ | |
1da177e4 | 3438 | |
6840ed07 | 3439 | if (pi->imtu < skb->len) |
1c2acffb | 3440 | goto drop; |
1da177e4 | 3441 | |
1c2acffb GP |
3442 | if (!sock_queue_rcv_skb(sk, skb)) |
3443 | goto done; | |
3444 | break; | |
3445 | ||
3446 | case L2CAP_MODE_ERTM: | |
3447 | control = get_unaligned_le16(skb->data); | |
3448 | skb_pull(skb, 2); | |
c74e560c | 3449 | len = skb->len; |
1c2acffb | 3450 | |
c74e560c GP |
3451 | if (__is_sar_start(control)) |
3452 | len -= 2; | |
3453 | ||
fcc203c3 GP |
3454 | if (pi->fcs == L2CAP_FCS_CRC16) |
3455 | len -= 2; | |
3456 | ||
30afb5b2 GP |
3457 | /* |
3458 | * We can just drop the corrupted I-frame here. | |
3459 | * Receiver will miss it and start proper recovery | |
3460 | * procedures and ask retransmission. | |
3461 | */ | |
c74e560c | 3462 | if (len > L2CAP_DEFAULT_MAX_PDU_SIZE) |
1c2acffb GP |
3463 | goto drop; |
3464 | ||
fcc203c3 GP |
3465 | if (l2cap_check_fcs(pi, skb)) |
3466 | goto drop; | |
3467 | ||
1c2acffb GP |
3468 | if (__is_iframe(control)) |
3469 | err = l2cap_data_channel_iframe(sk, control, skb); | |
3470 | else | |
3471 | err = l2cap_data_channel_sframe(sk, control, skb); | |
3472 | ||
3473 | if (!err) | |
3474 | goto done; | |
3475 | break; | |
3476 | ||
6840ed07 GP |
3477 | case L2CAP_MODE_STREAMING: |
3478 | control = get_unaligned_le16(skb->data); | |
3479 | skb_pull(skb, 2); | |
3480 | len = skb->len; | |
3481 | ||
3482 | if (__is_sar_start(control)) | |
3483 | len -= 2; | |
3484 | ||
fcc203c3 GP |
3485 | if (pi->fcs == L2CAP_FCS_CRC16) |
3486 | len -= 2; | |
3487 | ||
6840ed07 GP |
3488 | if (len > L2CAP_DEFAULT_MAX_PDU_SIZE || __is_sframe(control)) |
3489 | goto drop; | |
3490 | ||
fcc203c3 GP |
3491 | if (l2cap_check_fcs(pi, skb)) |
3492 | goto drop; | |
3493 | ||
6840ed07 GP |
3494 | tx_seq = __get_txseq(control); |
3495 | ||
3496 | if (pi->expected_tx_seq == tx_seq) | |
3497 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
3498 | else | |
3499 | pi->expected_tx_seq = tx_seq + 1; | |
3500 | ||
3501 | err = l2cap_sar_reassembly_sdu(sk, skb, control); | |
3502 | ||
3503 | goto done; | |
3504 | ||
1c2acffb GP |
3505 | default: |
3506 | BT_DBG("sk %p: bad mode 0x%2.2x", sk, l2cap_pi(sk)->mode); | |
3507 | break; | |
3508 | } | |
1da177e4 LT |
3509 | |
3510 | drop: | |
3511 | kfree_skb(skb); | |
3512 | ||
3513 | done: | |
0139418c MH |
3514 | if (sk) |
3515 | bh_unlock_sock(sk); | |
3516 | ||
1da177e4 LT |
3517 | return 0; |
3518 | } | |
3519 | ||
8e036fc3 | 3520 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
3521 | { |
3522 | struct sock *sk; | |
3523 | ||
3524 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
3525 | if (!sk) | |
3526 | goto drop; | |
3527 | ||
3528 | BT_DBG("sk %p, len %d", sk, skb->len); | |
3529 | ||
3530 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
3531 | goto drop; | |
3532 | ||
3533 | if (l2cap_pi(sk)->imtu < skb->len) | |
3534 | goto drop; | |
3535 | ||
3536 | if (!sock_queue_rcv_skb(sk, skb)) | |
3537 | goto done; | |
3538 | ||
3539 | drop: | |
3540 | kfree_skb(skb); | |
3541 | ||
3542 | done: | |
af05b30b GP |
3543 | if (sk) |
3544 | bh_unlock_sock(sk); | |
1da177e4 LT |
3545 | return 0; |
3546 | } | |
3547 | ||
3548 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
3549 | { | |
3550 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
3551 | u16 cid, len; |
3552 | __le16 psm; | |
1da177e4 LT |
3553 | |
3554 | skb_pull(skb, L2CAP_HDR_SIZE); | |
3555 | cid = __le16_to_cpu(lh->cid); | |
3556 | len = __le16_to_cpu(lh->len); | |
3557 | ||
1c2acffb GP |
3558 | if (len != skb->len) { |
3559 | kfree_skb(skb); | |
3560 | return; | |
3561 | } | |
3562 | ||
1da177e4 LT |
3563 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
3564 | ||
3565 | switch (cid) { | |
8db4dc46 | 3566 | case L2CAP_CID_SIGNALING: |
1da177e4 LT |
3567 | l2cap_sig_channel(conn, skb); |
3568 | break; | |
3569 | ||
8db4dc46 | 3570 | case L2CAP_CID_CONN_LESS: |
8e036fc3 | 3571 | psm = get_unaligned((__le16 *) skb->data); |
1da177e4 LT |
3572 | skb_pull(skb, 2); |
3573 | l2cap_conless_channel(conn, psm, skb); | |
3574 | break; | |
3575 | ||
3576 | default: | |
3577 | l2cap_data_channel(conn, cid, skb); | |
3578 | break; | |
3579 | } | |
3580 | } | |
3581 | ||
3582 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
3583 | ||
3584 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
3585 | { | |
3586 | int exact = 0, lm1 = 0, lm2 = 0; | |
3587 | register struct sock *sk; | |
3588 | struct hlist_node *node; | |
3589 | ||
3590 | if (type != ACL_LINK) | |
3591 | return 0; | |
3592 | ||
3593 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
3594 | ||
3595 | /* Find listening sockets and check their link_mode */ | |
3596 | read_lock(&l2cap_sk_list.lock); | |
3597 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
3598 | if (sk->sk_state != BT_LISTEN) | |
3599 | continue; | |
3600 | ||
3601 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
3602 | lm1 |= HCI_LM_ACCEPT; |
3603 | if (l2cap_pi(sk)->role_switch) | |
3604 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 3605 | exact++; |
2af6b9d5 MH |
3606 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
3607 | lm2 |= HCI_LM_ACCEPT; | |
3608 | if (l2cap_pi(sk)->role_switch) | |
3609 | lm2 |= HCI_LM_MASTER; | |
3610 | } | |
1da177e4 LT |
3611 | } |
3612 | read_unlock(&l2cap_sk_list.lock); | |
3613 | ||
3614 | return exact ? lm1 : lm2; | |
3615 | } | |
3616 | ||
3617 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
3618 | { | |
0139418c MH |
3619 | struct l2cap_conn *conn; |
3620 | ||
1da177e4 LT |
3621 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
3622 | ||
3623 | if (hcon->type != ACL_LINK) | |
3624 | return 0; | |
3625 | ||
3626 | if (!status) { | |
1da177e4 LT |
3627 | conn = l2cap_conn_add(hcon, status); |
3628 | if (conn) | |
3629 | l2cap_conn_ready(conn); | |
0139418c | 3630 | } else |
1da177e4 LT |
3631 | l2cap_conn_del(hcon, bt_err(status)); |
3632 | ||
3633 | return 0; | |
3634 | } | |
3635 | ||
2950f21a MH |
3636 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
3637 | { | |
3638 | struct l2cap_conn *conn = hcon->l2cap_data; | |
3639 | ||
3640 | BT_DBG("hcon %p", hcon); | |
3641 | ||
3642 | if (hcon->type != ACL_LINK || !conn) | |
3643 | return 0x13; | |
3644 | ||
3645 | return conn->disc_reason; | |
3646 | } | |
3647 | ||
3648 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) | |
1da177e4 LT |
3649 | { |
3650 | BT_DBG("hcon %p reason %d", hcon, reason); | |
3651 | ||
3652 | if (hcon->type != ACL_LINK) | |
3653 | return 0; | |
3654 | ||
3655 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 3656 | |
1da177e4 LT |
3657 | return 0; |
3658 | } | |
3659 | ||
f62e4323 MH |
3660 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
3661 | { | |
255c7601 MH |
3662 | if (sk->sk_type != SOCK_SEQPACKET) |
3663 | return; | |
3664 | ||
f62e4323 MH |
3665 | if (encrypt == 0x00) { |
3666 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { | |
3667 | l2cap_sock_clear_timer(sk); | |
3668 | l2cap_sock_set_timer(sk, HZ * 5); | |
3669 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
3670 | __l2cap_sock_close(sk, ECONNREFUSED); | |
3671 | } else { | |
3672 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) | |
3673 | l2cap_sock_clear_timer(sk); | |
3674 | } | |
3675 | } | |
3676 | ||
8c1b2355 | 3677 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
3678 | { |
3679 | struct l2cap_chan_list *l; | |
0139418c | 3680 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 3681 | struct sock *sk; |
1da177e4 | 3682 | |
0139418c | 3683 | if (!conn) |
1da177e4 | 3684 | return 0; |
0139418c | 3685 | |
1da177e4 LT |
3686 | l = &conn->chan_list; |
3687 | ||
3688 | BT_DBG("conn %p", conn); | |
3689 | ||
3690 | read_lock(&l->lock); | |
3691 | ||
3692 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
3693 | bh_lock_sock(sk); | |
3694 | ||
6a8d3010 MH |
3695 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
3696 | bh_unlock_sock(sk); | |
3697 | continue; | |
3698 | } | |
3699 | ||
f62e4323 | 3700 | if (!status && (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 3701 | sk->sk_state == BT_CONFIG)) { |
f62e4323 | 3702 | l2cap_check_encryption(sk, encrypt); |
9719f8af MH |
3703 | bh_unlock_sock(sk); |
3704 | continue; | |
3705 | } | |
3706 | ||
b1235d79 MH |
3707 | if (sk->sk_state == BT_CONNECT) { |
3708 | if (!status) { | |
3709 | struct l2cap_conn_req req; | |
3710 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
3711 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 3712 | |
b1235d79 | 3713 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
1da177e4 | 3714 | |
b1235d79 MH |
3715 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
3716 | L2CAP_CONN_REQ, sizeof(req), &req); | |
3717 | } else { | |
3718 | l2cap_sock_clear_timer(sk); | |
3719 | l2cap_sock_set_timer(sk, HZ / 10); | |
3720 | } | |
3721 | } else if (sk->sk_state == BT_CONNECT2) { | |
3722 | struct l2cap_conn_rsp rsp; | |
3723 | __u16 result; | |
1da177e4 | 3724 | |
b1235d79 MH |
3725 | if (!status) { |
3726 | sk->sk_state = BT_CONFIG; | |
3727 | result = L2CAP_CR_SUCCESS; | |
3728 | } else { | |
3729 | sk->sk_state = BT_DISCONN; | |
3730 | l2cap_sock_set_timer(sk, HZ / 10); | |
3731 | result = L2CAP_CR_SEC_BLOCK; | |
3732 | } | |
3733 | ||
3734 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
3735 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
3736 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 3737 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
3738 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
3739 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
3740 | } | |
1da177e4 LT |
3741 | |
3742 | bh_unlock_sock(sk); | |
3743 | } | |
3744 | ||
3745 | read_unlock(&l->lock); | |
b1235d79 | 3746 | |
1da177e4 LT |
3747 | return 0; |
3748 | } | |
3749 | ||
3750 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
3751 | { | |
3752 | struct l2cap_conn *conn = hcon->l2cap_data; | |
3753 | ||
3754 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
3755 | goto drop; | |
3756 | ||
3757 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
3758 | ||
3759 | if (flags & ACL_START) { | |
3760 | struct l2cap_hdr *hdr; | |
3761 | int len; | |
3762 | ||
3763 | if (conn->rx_len) { | |
3764 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
3765 | kfree_skb(conn->rx_skb); | |
3766 | conn->rx_skb = NULL; | |
3767 | conn->rx_len = 0; | |
3768 | l2cap_conn_unreliable(conn, ECOMM); | |
3769 | } | |
3770 | ||
3771 | if (skb->len < 2) { | |
3772 | BT_ERR("Frame is too short (len %d)", skb->len); | |
3773 | l2cap_conn_unreliable(conn, ECOMM); | |
3774 | goto drop; | |
3775 | } | |
3776 | ||
3777 | hdr = (struct l2cap_hdr *) skb->data; | |
3778 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
3779 | ||
3780 | if (len == skb->len) { | |
3781 | /* Complete frame received */ | |
3782 | l2cap_recv_frame(conn, skb); | |
3783 | return 0; | |
3784 | } | |
3785 | ||
3786 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
3787 | ||
3788 | if (skb->len > len) { | |
3789 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
3790 | skb->len, len); | |
3791 | l2cap_conn_unreliable(conn, ECOMM); | |
3792 | goto drop; | |
3793 | } | |
3794 | ||
3795 | /* Allocate skb for the complete frame (with header) */ | |
af05b30b GP |
3796 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
3797 | if (!conn->rx_skb) | |
1da177e4 LT |
3798 | goto drop; |
3799 | ||
d626f62b | 3800 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 3801 | skb->len); |
1da177e4 LT |
3802 | conn->rx_len = len - skb->len; |
3803 | } else { | |
3804 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
3805 | ||
3806 | if (!conn->rx_len) { | |
3807 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
3808 | l2cap_conn_unreliable(conn, ECOMM); | |
3809 | goto drop; | |
3810 | } | |
3811 | ||
3812 | if (skb->len > conn->rx_len) { | |
3813 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
3814 | skb->len, conn->rx_len); | |
3815 | kfree_skb(conn->rx_skb); | |
3816 | conn->rx_skb = NULL; | |
3817 | conn->rx_len = 0; | |
3818 | l2cap_conn_unreliable(conn, ECOMM); | |
3819 | goto drop; | |
3820 | } | |
3821 | ||
d626f62b | 3822 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 3823 | skb->len); |
1da177e4 LT |
3824 | conn->rx_len -= skb->len; |
3825 | ||
3826 | if (!conn->rx_len) { | |
3827 | /* Complete frame received */ | |
3828 | l2cap_recv_frame(conn, conn->rx_skb); | |
3829 | conn->rx_skb = NULL; | |
3830 | } | |
3831 | } | |
3832 | ||
3833 | drop: | |
3834 | kfree_skb(skb); | |
3835 | return 0; | |
3836 | } | |
3837 | ||
be9d1227 | 3838 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
3839 | { |
3840 | struct sock *sk; | |
3841 | struct hlist_node *node; | |
be9d1227 | 3842 | char *str = buf; |
1da177e4 LT |
3843 | |
3844 | read_lock_bh(&l2cap_sk_list.lock); | |
3845 | ||
be9d1227 MH |
3846 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
3847 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1da177e4 | 3848 | |
2af6b9d5 | 3849 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
be9d1227 | 3850 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), |
b4324b5d MH |
3851 | sk->sk_state, __le16_to_cpu(pi->psm), pi->scid, |
3852 | pi->dcid, pi->imtu, pi->omtu, pi->sec_level); | |
be9d1227 | 3853 | } |
1da177e4 | 3854 | |
1da177e4 | 3855 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 3856 | |
af05b30b | 3857 | return str - buf; |
1da177e4 LT |
3858 | } |
3859 | ||
be9d1227 | 3860 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
1da177e4 | 3861 | |
90ddc4f0 | 3862 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
3863 | .family = PF_BLUETOOTH, |
3864 | .owner = THIS_MODULE, | |
3865 | .release = l2cap_sock_release, | |
3866 | .bind = l2cap_sock_bind, | |
3867 | .connect = l2cap_sock_connect, | |
3868 | .listen = l2cap_sock_listen, | |
3869 | .accept = l2cap_sock_accept, | |
3870 | .getname = l2cap_sock_getname, | |
3871 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 3872 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 3873 | .poll = bt_sock_poll, |
3241ad82 | 3874 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
3875 | .mmap = sock_no_mmap, |
3876 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
3877 | .shutdown = l2cap_sock_shutdown, |
3878 | .setsockopt = l2cap_sock_setsockopt, | |
3879 | .getsockopt = l2cap_sock_getsockopt | |
3880 | }; | |
3881 | ||
3882 | static struct net_proto_family l2cap_sock_family_ops = { | |
3883 | .family = PF_BLUETOOTH, | |
3884 | .owner = THIS_MODULE, | |
3885 | .create = l2cap_sock_create, | |
3886 | }; | |
3887 | ||
3888 | static struct hci_proto l2cap_hci_proto = { | |
3889 | .name = "L2CAP", | |
3890 | .id = HCI_PROTO_L2CAP, | |
3891 | .connect_ind = l2cap_connect_ind, | |
3892 | .connect_cfm = l2cap_connect_cfm, | |
3893 | .disconn_ind = l2cap_disconn_ind, | |
2950f21a | 3894 | .disconn_cfm = l2cap_disconn_cfm, |
8c1b2355 | 3895 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
3896 | .recv_acldata = l2cap_recv_acldata |
3897 | }; | |
3898 | ||
3899 | static int __init l2cap_init(void) | |
3900 | { | |
3901 | int err; | |
be9d1227 | 3902 | |
1da177e4 LT |
3903 | err = proto_register(&l2cap_proto, 0); |
3904 | if (err < 0) | |
3905 | return err; | |
3906 | ||
3907 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
3908 | if (err < 0) { | |
3909 | BT_ERR("L2CAP socket registration failed"); | |
3910 | goto error; | |
3911 | } | |
3912 | ||
3913 | err = hci_register_proto(&l2cap_hci_proto); | |
3914 | if (err < 0) { | |
3915 | BT_ERR("L2CAP protocol registration failed"); | |
3916 | bt_sock_unregister(BTPROTO_L2CAP); | |
3917 | goto error; | |
3918 | } | |
3919 | ||
df5c37ea MH |
3920 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
3921 | BT_ERR("Failed to create L2CAP info file"); | |
1da177e4 LT |
3922 | |
3923 | BT_INFO("L2CAP ver %s", VERSION); | |
3924 | BT_INFO("L2CAP socket layer initialized"); | |
3925 | ||
3926 | return 0; | |
3927 | ||
3928 | error: | |
3929 | proto_unregister(&l2cap_proto); | |
3930 | return err; | |
3931 | } | |
3932 | ||
3933 | static void __exit l2cap_exit(void) | |
3934 | { | |
a91f2e39 | 3935 | class_remove_file(bt_class, &class_attr_l2cap); |
1da177e4 LT |
3936 | |
3937 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
3938 | BT_ERR("L2CAP socket unregistration failed"); | |
3939 | ||
3940 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
3941 | BT_ERR("L2CAP protocol unregistration failed"); | |
3942 | ||
3943 | proto_unregister(&l2cap_proto); | |
3944 | } | |
3945 | ||
3946 | void l2cap_load(void) | |
3947 | { | |
3948 | /* Dummy function to trigger automatic L2CAP module loading by | |
3949 | * other modules that use L2CAP sockets but don't use any other | |
3950 | * symbols from it. */ | |
3951 | return; | |
3952 | } | |
3953 | EXPORT_SYMBOL(l2cap_load); | |
3954 | ||
3955 | module_init(l2cap_init); | |
3956 | module_exit(l2cap_exit); | |
3957 | ||
44dd46de MH |
3958 | module_param(enable_ertm, bool, 0644); |
3959 | MODULE_PARM_DESC(enable_ertm, "Enable enhanced retransmission mode"); | |
3960 | ||
63fbd24e | 3961 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
3962 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
3963 | MODULE_VERSION(VERSION); | |
3964 | MODULE_LICENSE("GPL"); | |
3965 | MODULE_ALIAS("bt-proto-0"); |