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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> |
aef7d97c MH |
43 | #include <linux/debugfs.h> |
44 | #include <linux/seq_file.h> | |
af05b30b | 45 | #include <linux/uaccess.h> |
fcc203c3 | 46 | #include <linux/crc16.h> |
1da177e4 LT |
47 | #include <net/sock.h> |
48 | ||
49 | #include <asm/system.h> | |
1da177e4 LT |
50 | #include <asm/unaligned.h> |
51 | ||
52 | #include <net/bluetooth/bluetooth.h> | |
53 | #include <net/bluetooth/hci_core.h> | |
54 | #include <net/bluetooth/l2cap.h> | |
55 | ||
44dd46de MH |
56 | #define VERSION "2.14" |
57 | ||
58 | static int enable_ertm = 0; | |
f0709e03 | 59 | |
47ec1dcd | 60 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
e1027a7c | 61 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
1da177e4 | 62 | |
90ddc4f0 | 63 | static const struct proto_ops l2cap_sock_ops; |
1da177e4 | 64 | |
1890d36b GP |
65 | static struct workqueue_struct *_busy_wq; |
66 | ||
1da177e4 | 67 | static struct bt_sock_list l2cap_sk_list = { |
d5fb2962 | 68 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
1da177e4 LT |
69 | }; |
70 | ||
1890d36b GP |
71 | static void l2cap_busy_work(struct work_struct *work); |
72 | ||
1da177e4 LT |
73 | static void __l2cap_sock_close(struct sock *sk, int reason); |
74 | static void l2cap_sock_close(struct sock *sk); | |
75 | static void l2cap_sock_kill(struct sock *sk); | |
76 | ||
77 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
78 | u8 code, u8 ident, u16 dlen, void *data); | |
79 | ||
218bb9df GP |
80 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb); |
81 | ||
1da177e4 LT |
82 | /* ---- L2CAP timers ---- */ |
83 | static void l2cap_sock_timeout(unsigned long arg) | |
84 | { | |
85 | struct sock *sk = (struct sock *) arg; | |
b1235d79 | 86 | int reason; |
1da177e4 LT |
87 | |
88 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
89 | ||
90 | bh_lock_sock(sk); | |
b1235d79 | 91 | |
f62e4323 MH |
92 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
93 | reason = ECONNREFUSED; | |
94 | else if (sk->sk_state == BT_CONNECT && | |
2af6b9d5 | 95 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
b1235d79 MH |
96 | reason = ECONNREFUSED; |
97 | else | |
98 | reason = ETIMEDOUT; | |
99 | ||
100 | __l2cap_sock_close(sk, reason); | |
101 | ||
1da177e4 LT |
102 | bh_unlock_sock(sk); |
103 | ||
104 | l2cap_sock_kill(sk); | |
105 | sock_put(sk); | |
106 | } | |
107 | ||
108 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
109 | { | |
110 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
111 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
112 | } | |
113 | ||
114 | static void l2cap_sock_clear_timer(struct sock *sk) | |
115 | { | |
116 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
117 | sk_stop_timer(sk, &sk->sk_timer); | |
118 | } | |
119 | ||
0139418c MH |
120 | /* ---- L2CAP channels ---- */ |
121 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
122 | { | |
123 | struct sock *s; | |
124 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
125 | if (l2cap_pi(s)->dcid == cid) | |
126 | break; | |
127 | } | |
128 | return s; | |
129 | } | |
130 | ||
131 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
132 | { | |
133 | struct sock *s; | |
134 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
135 | if (l2cap_pi(s)->scid == cid) | |
136 | break; | |
137 | } | |
138 | return s; | |
139 | } | |
140 | ||
141 | /* Find channel with given SCID. | |
142 | * Returns locked socket */ | |
143 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
144 | { | |
145 | struct sock *s; | |
146 | read_lock(&l->lock); | |
147 | s = __l2cap_get_chan_by_scid(l, cid); | |
af05b30b GP |
148 | if (s) |
149 | bh_lock_sock(s); | |
0139418c MH |
150 | read_unlock(&l->lock); |
151 | return s; | |
152 | } | |
153 | ||
154 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
155 | { | |
156 | struct sock *s; | |
157 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
158 | if (l2cap_pi(s)->ident == ident) | |
159 | break; | |
160 | } | |
161 | return s; | |
162 | } | |
163 | ||
164 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
165 | { | |
166 | struct sock *s; | |
167 | read_lock(&l->lock); | |
168 | s = __l2cap_get_chan_by_ident(l, ident); | |
af05b30b GP |
169 | if (s) |
170 | bh_lock_sock(s); | |
0139418c MH |
171 | read_unlock(&l->lock); |
172 | return s; | |
173 | } | |
174 | ||
175 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
176 | { | |
8db4dc46 | 177 | u16 cid = L2CAP_CID_DYN_START; |
0139418c | 178 | |
8db4dc46 | 179 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
af05b30b | 180 | if (!__l2cap_get_chan_by_scid(l, cid)) |
0139418c MH |
181 | return cid; |
182 | } | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
188 | { | |
189 | sock_hold(sk); | |
190 | ||
191 | if (l->head) | |
192 | l2cap_pi(l->head)->prev_c = sk; | |
193 | ||
194 | l2cap_pi(sk)->next_c = l->head; | |
195 | l2cap_pi(sk)->prev_c = NULL; | |
196 | l->head = sk; | |
197 | } | |
198 | ||
199 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
200 | { | |
201 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
202 | ||
fd1278d7 | 203 | write_lock_bh(&l->lock); |
0139418c MH |
204 | if (sk == l->head) |
205 | l->head = next; | |
206 | ||
207 | if (next) | |
208 | l2cap_pi(next)->prev_c = prev; | |
209 | if (prev) | |
210 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 211 | write_unlock_bh(&l->lock); |
0139418c MH |
212 | |
213 | __sock_put(sk); | |
214 | } | |
215 | ||
216 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
217 | { | |
218 | struct l2cap_chan_list *l = &conn->chan_list; | |
219 | ||
af05b30b GP |
220 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
221 | l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
0139418c | 222 | |
2950f21a MH |
223 | conn->disc_reason = 0x13; |
224 | ||
0139418c MH |
225 | l2cap_pi(sk)->conn = conn; |
226 | ||
bd3c9e25 | 227 | if (sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) { |
0139418c MH |
228 | /* Alloc CID for connection-oriented socket */ |
229 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
230 | } else if (sk->sk_type == SOCK_DGRAM) { | |
231 | /* Connectionless socket */ | |
8db4dc46 GP |
232 | l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS; |
233 | l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS; | |
0139418c MH |
234 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
235 | } else { | |
236 | /* Raw socket can send/recv signalling messages only */ | |
8db4dc46 GP |
237 | l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING; |
238 | l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING; | |
0139418c MH |
239 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
240 | } | |
241 | ||
242 | __l2cap_chan_link(l, sk); | |
243 | ||
244 | if (parent) | |
245 | bt_accept_enqueue(parent, sk); | |
246 | } | |
247 | ||
8e87d142 | 248 | /* Delete channel. |
0139418c MH |
249 | * Must be called on the locked socket. */ |
250 | static void l2cap_chan_del(struct sock *sk, int err) | |
251 | { | |
252 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
253 | struct sock *parent = bt_sk(sk)->parent; | |
254 | ||
255 | l2cap_sock_clear_timer(sk); | |
256 | ||
257 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
258 | ||
8e87d142 | 259 | if (conn) { |
0139418c MH |
260 | /* Unlink from channel list */ |
261 | l2cap_chan_unlink(&conn->chan_list, sk); | |
262 | l2cap_pi(sk)->conn = NULL; | |
263 | hci_conn_put(conn->hcon); | |
264 | } | |
265 | ||
b1235d79 | 266 | sk->sk_state = BT_CLOSED; |
0139418c MH |
267 | sock_set_flag(sk, SOCK_ZAPPED); |
268 | ||
269 | if (err) | |
270 | sk->sk_err = err; | |
271 | ||
272 | if (parent) { | |
273 | bt_accept_unlink(sk); | |
274 | parent->sk_data_ready(parent, 0); | |
275 | } else | |
276 | sk->sk_state_change(sk); | |
c13ffa62 GP |
277 | |
278 | skb_queue_purge(TX_QUEUE(sk)); | |
279 | ||
280 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
281 | struct srej_list *l, *tmp; | |
282 | ||
283 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
284 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
285 | del_timer(&l2cap_pi(sk)->ack_timer); | |
286 | ||
287 | skb_queue_purge(SREJ_QUEUE(sk)); | |
288 | skb_queue_purge(BUSY_QUEUE(sk)); | |
289 | ||
290 | list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) { | |
291 | list_del(&l->list); | |
292 | kfree(l); | |
293 | } | |
294 | } | |
0139418c MH |
295 | } |
296 | ||
79d554a6 | 297 | /* Service level security */ |
2af6b9d5 | 298 | static inline int l2cap_check_security(struct sock *sk) |
79d554a6 MH |
299 | { |
300 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
0684e5f9 MH |
301 | __u8 auth_type; |
302 | ||
00ae4af9 MH |
303 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
304 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
305 | auth_type = HCI_AT_NO_BONDING_MITM; | |
306 | else | |
af05b30b | 307 | auth_type = HCI_AT_NO_BONDING; |
00ae4af9 MH |
308 | |
309 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
310 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
311 | } else { | |
312 | switch (l2cap_pi(sk)->sec_level) { | |
313 | case BT_SECURITY_HIGH: | |
314 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
315 | break; | |
316 | case BT_SECURITY_MEDIUM: | |
317 | auth_type = HCI_AT_GENERAL_BONDING; | |
318 | break; | |
319 | default: | |
320 | auth_type = HCI_AT_NO_BONDING; | |
321 | break; | |
322 | } | |
0684e5f9 | 323 | } |
79d554a6 | 324 | |
0684e5f9 MH |
325 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
326 | auth_type); | |
79d554a6 MH |
327 | } |
328 | ||
4e8402a3 MH |
329 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
330 | { | |
331 | u8 id; | |
332 | ||
333 | /* Get next available identificator. | |
334 | * 1 - 128 are used by kernel. | |
335 | * 129 - 199 are reserved. | |
336 | * 200 - 254 are used by utilities like l2ping, etc. | |
337 | */ | |
338 | ||
339 | spin_lock_bh(&conn->lock); | |
340 | ||
341 | if (++conn->tx_ident > 128) | |
342 | conn->tx_ident = 1; | |
343 | ||
344 | id = conn->tx_ident; | |
345 | ||
346 | spin_unlock_bh(&conn->lock); | |
347 | ||
348 | return id; | |
349 | } | |
350 | ||
9a9c6a34 | 351 | static inline void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) |
4e8402a3 MH |
352 | { |
353 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
354 | ||
355 | BT_DBG("code 0x%2.2x", code); | |
356 | ||
357 | if (!skb) | |
9a9c6a34 | 358 | return; |
4e8402a3 | 359 | |
9a9c6a34 | 360 | hci_send_acl(conn->hcon, skb, 0); |
4e8402a3 MH |
361 | } |
362 | ||
9a9c6a34 | 363 | static inline void l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control) |
1c2acffb GP |
364 | { |
365 | struct sk_buff *skb; | |
366 | struct l2cap_hdr *lh; | |
367 | struct l2cap_conn *conn = pi->conn; | |
c13ffa62 | 368 | struct sock *sk = (struct sock *)pi; |
fcc203c3 GP |
369 | int count, hlen = L2CAP_HDR_SIZE + 2; |
370 | ||
c13ffa62 GP |
371 | if (sk->sk_state != BT_CONNECTED) |
372 | return; | |
373 | ||
fcc203c3 GP |
374 | if (pi->fcs == L2CAP_FCS_CRC16) |
375 | hlen += 2; | |
1c2acffb GP |
376 | |
377 | BT_DBG("pi %p, control 0x%2.2x", pi, control); | |
378 | ||
fcc203c3 | 379 | count = min_t(unsigned int, conn->mtu, hlen); |
1c2acffb GP |
380 | control |= L2CAP_CTRL_FRAME_TYPE; |
381 | ||
9e917af1 GP |
382 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
383 | control |= L2CAP_CTRL_FINAL; | |
384 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
385 | } | |
386 | ||
f0946ccf GP |
387 | if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { |
388 | control |= L2CAP_CTRL_POLL; | |
389 | pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; | |
390 | } | |
391 | ||
1c2acffb GP |
392 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
393 | if (!skb) | |
9a9c6a34 | 394 | return; |
1c2acffb GP |
395 | |
396 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
fcc203c3 | 397 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
1c2acffb GP |
398 | lh->cid = cpu_to_le16(pi->dcid); |
399 | put_unaligned_le16(control, skb_put(skb, 2)); | |
400 | ||
fcc203c3 GP |
401 | if (pi->fcs == L2CAP_FCS_CRC16) { |
402 | u16 fcs = crc16(0, (u8 *)lh, count - 2); | |
403 | put_unaligned_le16(fcs, skb_put(skb, 2)); | |
404 | } | |
405 | ||
9a9c6a34 | 406 | hci_send_acl(pi->conn->hcon, skb, 0); |
1c2acffb GP |
407 | } |
408 | ||
9a9c6a34 | 409 | static inline void l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control) |
7e743090 | 410 | { |
1890d36b | 411 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { |
7e743090 | 412 | control |= L2CAP_SUPER_RCV_NOT_READY; |
1890d36b GP |
413 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
414 | } else | |
7e743090 GP |
415 | control |= L2CAP_SUPER_RCV_READY; |
416 | ||
2ab25cdd GP |
417 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
418 | ||
9a9c6a34 | 419 | l2cap_send_sframe(pi, control); |
7e743090 GP |
420 | } |
421 | ||
e501d055 AE |
422 | static inline int __l2cap_no_conn_pending(struct sock *sk) |
423 | { | |
424 | return !(l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND); | |
425 | } | |
426 | ||
79d554a6 MH |
427 | static void l2cap_do_start(struct sock *sk) |
428 | { | |
429 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
430 | ||
431 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
984947dc MH |
432 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
433 | return; | |
434 | ||
e501d055 | 435 | if (l2cap_check_security(sk) && __l2cap_no_conn_pending(sk)) { |
b1235d79 MH |
436 | struct l2cap_conn_req req; |
437 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
438 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 439 | |
b1235d79 | 440 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
e501d055 | 441 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
79d554a6 | 442 | |
b1235d79 | 443 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 444 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 445 | } |
79d554a6 MH |
446 | } else { |
447 | struct l2cap_info_req req; | |
448 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
449 | ||
450 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
451 | conn->info_ident = l2cap_get_ident(conn); | |
452 | ||
453 | mod_timer(&conn->info_timer, jiffies + | |
454 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
455 | ||
456 | l2cap_send_cmd(conn, conn->info_ident, | |
457 | L2CAP_INFO_REQ, sizeof(req), &req); | |
458 | } | |
459 | } | |
460 | ||
cf6c2c0b GP |
461 | static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
462 | { | |
463 | u32 local_feat_mask = l2cap_feat_mask; | |
464 | if (enable_ertm) | |
465 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; | |
466 | ||
467 | switch (mode) { | |
468 | case L2CAP_MODE_ERTM: | |
469 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; | |
470 | case L2CAP_MODE_STREAMING: | |
471 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; | |
472 | default: | |
473 | return 0x00; | |
474 | } | |
475 | } | |
476 | ||
9b108fc0 | 477 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk, int err) |
22121fc9 GP |
478 | { |
479 | struct l2cap_disconn_req req; | |
480 | ||
c13ffa62 GP |
481 | if (!conn) |
482 | return; | |
483 | ||
484 | skb_queue_purge(TX_QUEUE(sk)); | |
485 | ||
486 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
487 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
488 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
489 | del_timer(&l2cap_pi(sk)->ack_timer); | |
490 | } | |
491 | ||
22121fc9 GP |
492 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
493 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
494 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
495 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
c13ffa62 GP |
496 | |
497 | sk->sk_state = BT_DISCONN; | |
9b108fc0 | 498 | sk->sk_err = err; |
22121fc9 GP |
499 | } |
500 | ||
1da177e4 | 501 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
502 | static void l2cap_conn_start(struct l2cap_conn *conn) |
503 | { | |
504 | struct l2cap_chan_list *l = &conn->chan_list; | |
cf6c2c0b | 505 | struct sock_del_list del, *tmp1, *tmp2; |
4e8402a3 MH |
506 | struct sock *sk; |
507 | ||
508 | BT_DBG("conn %p", conn); | |
509 | ||
cf6c2c0b GP |
510 | INIT_LIST_HEAD(&del.list); |
511 | ||
4e8402a3 MH |
512 | read_lock(&l->lock); |
513 | ||
514 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
515 | bh_lock_sock(sk); | |
516 | ||
bd3c9e25 GP |
517 | if (sk->sk_type != SOCK_SEQPACKET && |
518 | sk->sk_type != SOCK_STREAM) { | |
79d554a6 MH |
519 | bh_unlock_sock(sk); |
520 | continue; | |
521 | } | |
522 | ||
523 | if (sk->sk_state == BT_CONNECT) { | |
e501d055 AE |
524 | if (l2cap_check_security(sk) && |
525 | __l2cap_no_conn_pending(sk)) { | |
b1235d79 | 526 | struct l2cap_conn_req req; |
cf6c2c0b GP |
527 | |
528 | if (!l2cap_mode_supported(l2cap_pi(sk)->mode, | |
529 | conn->feat_mask) | |
530 | && l2cap_pi(sk)->conf_state & | |
531 | L2CAP_CONF_STATE2_DEVICE) { | |
532 | tmp1 = kzalloc(sizeof(struct srej_list), | |
533 | GFP_ATOMIC); | |
534 | tmp1->sk = sk; | |
535 | list_add_tail(&tmp1->list, &del.list); | |
536 | bh_unlock_sock(sk); | |
537 | continue; | |
538 | } | |
539 | ||
b1235d79 MH |
540 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
541 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 542 | |
b1235d79 | 543 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
e501d055 | 544 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
79d554a6 | 545 | |
b1235d79 | 546 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4e8402a3 | 547 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 548 | } |
79d554a6 MH |
549 | } else if (sk->sk_state == BT_CONNECT2) { |
550 | struct l2cap_conn_rsp rsp; | |
551 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
552 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
553 | ||
2af6b9d5 | 554 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
555 | if (bt_sk(sk)->defer_setup) { |
556 | struct sock *parent = bt_sk(sk)->parent; | |
557 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
558 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
559 | parent->sk_data_ready(parent, 0); | |
560 | ||
561 | } else { | |
562 | sk->sk_state = BT_CONFIG; | |
563 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
564 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
565 | } | |
79d554a6 MH |
566 | } else { |
567 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
568 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
569 | } | |
570 | ||
571 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
572 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4e8402a3 MH |
573 | } |
574 | ||
575 | bh_unlock_sock(sk); | |
576 | } | |
577 | ||
578 | read_unlock(&l->lock); | |
cf6c2c0b GP |
579 | |
580 | list_for_each_entry_safe(tmp1, tmp2, &del.list, list) { | |
581 | bh_lock_sock(tmp1->sk); | |
582 | __l2cap_sock_close(tmp1->sk, ECONNRESET); | |
583 | bh_unlock_sock(tmp1->sk); | |
584 | list_del(&tmp1->list); | |
585 | kfree(tmp1); | |
586 | } | |
4e8402a3 MH |
587 | } |
588 | ||
589 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
590 | { | |
79d554a6 MH |
591 | struct l2cap_chan_list *l = &conn->chan_list; |
592 | struct sock *sk; | |
4e8402a3 | 593 | |
79d554a6 | 594 | BT_DBG("conn %p", conn); |
4e8402a3 | 595 | |
79d554a6 | 596 | read_lock(&l->lock); |
4e8402a3 | 597 | |
79d554a6 MH |
598 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
599 | bh_lock_sock(sk); | |
4e8402a3 | 600 | |
bd3c9e25 GP |
601 | if (sk->sk_type != SOCK_SEQPACKET && |
602 | sk->sk_type != SOCK_STREAM) { | |
79d554a6 MH |
603 | l2cap_sock_clear_timer(sk); |
604 | sk->sk_state = BT_CONNECTED; | |
605 | sk->sk_state_change(sk); | |
606 | } else if (sk->sk_state == BT_CONNECT) | |
607 | l2cap_do_start(sk); | |
4e8402a3 | 608 | |
79d554a6 | 609 | bh_unlock_sock(sk); |
4e8402a3 | 610 | } |
79d554a6 MH |
611 | |
612 | read_unlock(&l->lock); | |
4e8402a3 MH |
613 | } |
614 | ||
615 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
616 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
617 | { | |
618 | struct l2cap_chan_list *l = &conn->chan_list; | |
619 | struct sock *sk; | |
620 | ||
621 | BT_DBG("conn %p", conn); | |
622 | ||
623 | read_lock(&l->lock); | |
624 | ||
625 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 626 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
627 | sk->sk_err = err; |
628 | } | |
629 | ||
630 | read_unlock(&l->lock); | |
631 | } | |
632 | ||
633 | static void l2cap_info_timeout(unsigned long arg) | |
634 | { | |
635 | struct l2cap_conn *conn = (void *) arg; | |
636 | ||
984947dc | 637 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 638 | conn->info_ident = 0; |
984947dc | 639 | |
4e8402a3 MH |
640 | l2cap_conn_start(conn); |
641 | } | |
642 | ||
1da177e4 LT |
643 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
644 | { | |
0139418c | 645 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 646 | |
0139418c | 647 | if (conn || status) |
1da177e4 LT |
648 | return conn; |
649 | ||
0139418c MH |
650 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
651 | if (!conn) | |
1da177e4 | 652 | return NULL; |
1da177e4 LT |
653 | |
654 | hcon->l2cap_data = conn; | |
655 | conn->hcon = hcon; | |
656 | ||
0139418c MH |
657 | BT_DBG("hcon %p conn %p", hcon, conn); |
658 | ||
1da177e4 LT |
659 | conn->mtu = hcon->hdev->acl_mtu; |
660 | conn->src = &hcon->hdev->bdaddr; | |
661 | conn->dst = &hcon->dst; | |
662 | ||
4e8402a3 MH |
663 | conn->feat_mask = 0; |
664 | ||
1da177e4 LT |
665 | spin_lock_init(&conn->lock); |
666 | rwlock_init(&conn->chan_list.lock); | |
667 | ||
45054dc1 DY |
668 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
669 | (unsigned long) conn); | |
670 | ||
2950f21a MH |
671 | conn->disc_reason = 0x13; |
672 | ||
1da177e4 LT |
673 | return conn; |
674 | } | |
675 | ||
0139418c | 676 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 677 | { |
0139418c | 678 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
679 | struct sock *sk; |
680 | ||
0139418c MH |
681 | if (!conn) |
682 | return; | |
1da177e4 LT |
683 | |
684 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
685 | ||
7585b97a | 686 | kfree_skb(conn->rx_skb); |
1da177e4 LT |
687 | |
688 | /* Kill channels */ | |
689 | while ((sk = conn->chan_list.head)) { | |
690 | bh_lock_sock(sk); | |
691 | l2cap_chan_del(sk, err); | |
692 | bh_unlock_sock(sk); | |
693 | l2cap_sock_kill(sk); | |
694 | } | |
695 | ||
8e8440f5 DY |
696 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
697 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 698 | |
1da177e4 LT |
699 | hcon->l2cap_data = NULL; |
700 | kfree(conn); | |
1da177e4 LT |
701 | } |
702 | ||
703 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
704 | { | |
705 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 706 | write_lock_bh(&l->lock); |
1da177e4 | 707 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 708 | write_unlock_bh(&l->lock); |
1da177e4 LT |
709 | } |
710 | ||
1da177e4 | 711 | /* ---- Socket interface ---- */ |
8e036fc3 | 712 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
713 | { |
714 | struct sock *sk; | |
715 | struct hlist_node *node; | |
716 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
717 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
718 | goto found; | |
719 | sk = NULL; | |
720 | found: | |
721 | return sk; | |
722 | } | |
723 | ||
724 | /* Find socket with psm and source bdaddr. | |
725 | * Returns closest match. | |
726 | */ | |
8e036fc3 | 727 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
728 | { |
729 | struct sock *sk = NULL, *sk1 = NULL; | |
730 | struct hlist_node *node; | |
731 | ||
732 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
733 | if (state && sk->sk_state != state) | |
734 | continue; | |
735 | ||
736 | if (l2cap_pi(sk)->psm == psm) { | |
737 | /* Exact match. */ | |
738 | if (!bacmp(&bt_sk(sk)->src, src)) | |
739 | break; | |
740 | ||
741 | /* Closest match */ | |
742 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
743 | sk1 = sk; | |
744 | } | |
745 | } | |
746 | return node ? sk : sk1; | |
747 | } | |
748 | ||
749 | /* Find socket with given address (psm, src). | |
750 | * Returns locked socket */ | |
8e036fc3 | 751 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
752 | { |
753 | struct sock *s; | |
754 | read_lock(&l2cap_sk_list.lock); | |
755 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
af05b30b GP |
756 | if (s) |
757 | bh_lock_sock(s); | |
1da177e4 LT |
758 | read_unlock(&l2cap_sk_list.lock); |
759 | return s; | |
760 | } | |
761 | ||
762 | static void l2cap_sock_destruct(struct sock *sk) | |
763 | { | |
764 | BT_DBG("sk %p", sk); | |
765 | ||
766 | skb_queue_purge(&sk->sk_receive_queue); | |
767 | skb_queue_purge(&sk->sk_write_queue); | |
768 | } | |
769 | ||
770 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
771 | { | |
772 | struct sock *sk; | |
773 | ||
774 | BT_DBG("parent %p", parent); | |
775 | ||
776 | /* Close not yet accepted channels */ | |
777 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
778 | l2cap_sock_close(sk); | |
779 | ||
b1235d79 | 780 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
781 | sock_set_flag(parent, SOCK_ZAPPED); |
782 | } | |
783 | ||
784 | /* Kill socket (only if zapped and orphan) | |
785 | * Must be called on unlocked socket. | |
786 | */ | |
787 | static void l2cap_sock_kill(struct sock *sk) | |
788 | { | |
789 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
790 | return; | |
791 | ||
792 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
793 | ||
794 | /* Kill poor orphan */ | |
795 | bt_sock_unlink(&l2cap_sk_list, sk); | |
796 | sock_set_flag(sk, SOCK_DEAD); | |
797 | sock_put(sk); | |
798 | } | |
799 | ||
800 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
801 | { | |
802 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
803 | ||
804 | switch (sk->sk_state) { | |
805 | case BT_LISTEN: | |
806 | l2cap_sock_cleanup_listen(sk); | |
807 | break; | |
808 | ||
809 | case BT_CONNECTED: | |
810 | case BT_CONFIG: | |
bd3c9e25 GP |
811 | if (sk->sk_type == SOCK_SEQPACKET || |
812 | sk->sk_type == SOCK_STREAM) { | |
1da177e4 | 813 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
1da177e4 | 814 | |
1da177e4 | 815 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
9b108fc0 | 816 | l2cap_send_disconn_req(conn, sk, reason); |
b1235d79 | 817 | } else |
1da177e4 | 818 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
819 | break; |
820 | ||
f66dc81f | 821 | case BT_CONNECT2: |
bd3c9e25 GP |
822 | if (sk->sk_type == SOCK_SEQPACKET || |
823 | sk->sk_type == SOCK_STREAM) { | |
f66dc81f MH |
824 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
825 | struct l2cap_conn_rsp rsp; | |
826 | __u16 result; | |
827 | ||
828 | if (bt_sk(sk)->defer_setup) | |
829 | result = L2CAP_CR_SEC_BLOCK; | |
830 | else | |
831 | result = L2CAP_CR_BAD_PSM; | |
832 | ||
833 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
834 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
835 | rsp.result = cpu_to_le16(result); | |
836 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
837 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
838 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
839 | } else | |
840 | l2cap_chan_del(sk, reason); | |
841 | break; | |
842 | ||
1da177e4 LT |
843 | case BT_CONNECT: |
844 | case BT_DISCONN: | |
845 | l2cap_chan_del(sk, reason); | |
846 | break; | |
847 | ||
848 | default: | |
849 | sock_set_flag(sk, SOCK_ZAPPED); | |
850 | break; | |
851 | } | |
852 | } | |
853 | ||
854 | /* Must be called on unlocked socket. */ | |
855 | static void l2cap_sock_close(struct sock *sk) | |
856 | { | |
857 | l2cap_sock_clear_timer(sk); | |
858 | lock_sock(sk); | |
859 | __l2cap_sock_close(sk, ECONNRESET); | |
860 | release_sock(sk); | |
861 | l2cap_sock_kill(sk); | |
862 | } | |
863 | ||
864 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
865 | { | |
866 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
867 | ||
868 | BT_DBG("sk %p", sk); | |
869 | ||
870 | if (parent) { | |
871 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
872 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
873 | ||
1da177e4 LT |
874 | pi->imtu = l2cap_pi(parent)->imtu; |
875 | pi->omtu = l2cap_pi(parent)->omtu; | |
85eb53c6 | 876 | pi->conf_state = l2cap_pi(parent)->conf_state; |
c6b03cf9 MH |
877 | pi->mode = l2cap_pi(parent)->mode; |
878 | pi->fcs = l2cap_pi(parent)->fcs; | |
68d7f0ce | 879 | pi->max_tx = l2cap_pi(parent)->max_tx; |
14b5aa71 | 880 | pi->tx_win = l2cap_pi(parent)->tx_win; |
2af6b9d5 MH |
881 | pi->sec_level = l2cap_pi(parent)->sec_level; |
882 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
883 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
884 | } else { |
885 | pi->imtu = L2CAP_DEFAULT_MTU; | |
886 | pi->omtu = 0; | |
85eb53c6 | 887 | if (enable_ertm && sk->sk_type == SOCK_STREAM) { |
bd3c9e25 | 888 | pi->mode = L2CAP_MODE_ERTM; |
85eb53c6 GP |
889 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
890 | } else { | |
bd3c9e25 | 891 | pi->mode = L2CAP_MODE_BASIC; |
85eb53c6 | 892 | } |
fd059b9b | 893 | pi->max_tx = L2CAP_DEFAULT_MAX_TX; |
c6b03cf9 | 894 | pi->fcs = L2CAP_FCS_CRC16; |
fd059b9b | 895 | pi->tx_win = L2CAP_DEFAULT_TX_WINDOW; |
2af6b9d5 MH |
896 | pi->sec_level = BT_SECURITY_LOW; |
897 | pi->role_switch = 0; | |
898 | pi->force_reliable = 0; | |
1da177e4 LT |
899 | } |
900 | ||
901 | /* Default config options */ | |
5dee9e7c | 902 | pi->conf_len = 0; |
1da177e4 | 903 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
45054dc1 DY |
904 | skb_queue_head_init(TX_QUEUE(sk)); |
905 | skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b | 906 | skb_queue_head_init(BUSY_QUEUE(sk)); |
45054dc1 | 907 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
1da177e4 LT |
908 | } |
909 | ||
910 | static struct proto l2cap_proto = { | |
911 | .name = "L2CAP", | |
912 | .owner = THIS_MODULE, | |
913 | .obj_size = sizeof(struct l2cap_pinfo) | |
914 | }; | |
915 | ||
1b8d7ae4 | 916 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
917 | { |
918 | struct sock *sk; | |
919 | ||
6257ff21 | 920 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
921 | if (!sk) |
922 | return NULL; | |
923 | ||
924 | sock_init_data(sock, sk); | |
925 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
926 | ||
927 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 928 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
929 | |
930 | sock_reset_flag(sk, SOCK_ZAPPED); | |
931 | ||
932 | sk->sk_protocol = proto; | |
b1235d79 | 933 | sk->sk_state = BT_OPEN; |
1da177e4 | 934 | |
b1235d79 | 935 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
936 | |
937 | bt_sock_link(&l2cap_sk_list, sk); | |
938 | return sk; | |
939 | } | |
940 | ||
3f378b68 EP |
941 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, |
942 | int kern) | |
1da177e4 LT |
943 | { |
944 | struct sock *sk; | |
945 | ||
946 | BT_DBG("sock %p", sock); | |
947 | ||
948 | sock->state = SS_UNCONNECTED; | |
949 | ||
bd3c9e25 | 950 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && |
1da177e4 LT |
951 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
952 | return -ESOCKTNOSUPPORT; | |
953 | ||
c84b3268 | 954 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
1da177e4 LT |
955 | return -EPERM; |
956 | ||
957 | sock->ops = &l2cap_sock_ops; | |
958 | ||
1b8d7ae4 | 959 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
960 | if (!sk) |
961 | return -ENOMEM; | |
962 | ||
963 | l2cap_sock_init(sk, NULL); | |
964 | return 0; | |
965 | } | |
966 | ||
f29972de | 967 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
1da177e4 | 968 | { |
1da177e4 | 969 | struct sock *sk = sock->sk; |
f29972de MH |
970 | struct sockaddr_l2 la; |
971 | int len, err = 0; | |
1da177e4 | 972 | |
f29972de | 973 | BT_DBG("sk %p", sk); |
1da177e4 LT |
974 | |
975 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
976 | return -EINVAL; | |
977 | ||
f29972de MH |
978 | memset(&la, 0, sizeof(la)); |
979 | len = min_t(unsigned int, sizeof(la), alen); | |
980 | memcpy(&la, addr, len); | |
981 | ||
2a517ca6 MH |
982 | if (la.l2_cid) |
983 | return -EINVAL; | |
984 | ||
1da177e4 LT |
985 | lock_sock(sk); |
986 | ||
987 | if (sk->sk_state != BT_OPEN) { | |
988 | err = -EBADFD; | |
989 | goto done; | |
990 | } | |
991 | ||
b4324b5d | 992 | if (la.l2_psm && __le16_to_cpu(la.l2_psm) < 0x1001 && |
847641d7 MH |
993 | !capable(CAP_NET_BIND_SERVICE)) { |
994 | err = -EACCES; | |
995 | goto done; | |
996 | } | |
8e87d142 | 997 | |
1da177e4 LT |
998 | write_lock_bh(&l2cap_sk_list.lock); |
999 | ||
f29972de | 1000 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
1da177e4 LT |
1001 | err = -EADDRINUSE; |
1002 | } else { | |
1003 | /* Save source address */ | |
f29972de MH |
1004 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
1005 | l2cap_pi(sk)->psm = la.l2_psm; | |
1006 | l2cap_pi(sk)->sport = la.l2_psm; | |
1da177e4 | 1007 | sk->sk_state = BT_BOUND; |
2af6b9d5 | 1008 | |
b4324b5d MH |
1009 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
1010 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
2af6b9d5 | 1011 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
1da177e4 LT |
1012 | } |
1013 | ||
1014 | write_unlock_bh(&l2cap_sk_list.lock); | |
1015 | ||
1016 | done: | |
1017 | release_sock(sk); | |
1018 | return err; | |
1019 | } | |
1020 | ||
1021 | static int l2cap_do_connect(struct sock *sk) | |
1022 | { | |
1023 | bdaddr_t *src = &bt_sk(sk)->src; | |
1024 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
1025 | struct l2cap_conn *conn; | |
1026 | struct hci_conn *hcon; | |
1027 | struct hci_dev *hdev; | |
09ab6f4c | 1028 | __u8 auth_type; |
44d0e48e | 1029 | int err; |
1da177e4 | 1030 | |
f29972de MH |
1031 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
1032 | l2cap_pi(sk)->psm); | |
1da177e4 | 1033 | |
af05b30b GP |
1034 | hdev = hci_get_route(dst, src); |
1035 | if (!hdev) | |
1da177e4 LT |
1036 | return -EHOSTUNREACH; |
1037 | ||
1038 | hci_dev_lock_bh(hdev); | |
1039 | ||
1040 | err = -ENOMEM; | |
1041 | ||
8c1b2355 | 1042 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
1043 | switch (l2cap_pi(sk)->sec_level) { |
1044 | case BT_SECURITY_HIGH: | |
8c1b2355 | 1045 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
1046 | break; |
1047 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 1048 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
1049 | break; |
1050 | default: | |
09ab6f4c | 1051 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
1052 | break; |
1053 | } | |
8c1b2355 | 1054 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 1055 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 1056 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 1057 | else |
8c1b2355 | 1058 | auth_type = HCI_AT_NO_BONDING; |
435fef20 MH |
1059 | |
1060 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
1061 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
8c1b2355 | 1062 | } else { |
2af6b9d5 MH |
1063 | switch (l2cap_pi(sk)->sec_level) { |
1064 | case BT_SECURITY_HIGH: | |
8c1b2355 | 1065 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
1066 | break; |
1067 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 1068 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
1069 | break; |
1070 | default: | |
8c1b2355 | 1071 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
1072 | break; |
1073 | } | |
09ab6f4c MH |
1074 | } |
1075 | ||
2af6b9d5 MH |
1076 | hcon = hci_connect(hdev, ACL_LINK, dst, |
1077 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
1078 | if (!hcon) |
1079 | goto done; | |
1080 | ||
1081 | conn = l2cap_conn_add(hcon, 0); | |
1082 | if (!conn) { | |
1083 | hci_conn_put(hcon); | |
1084 | goto done; | |
1085 | } | |
1086 | ||
1087 | err = 0; | |
1088 | ||
1089 | /* Update source addr of the socket */ | |
1090 | bacpy(src, conn->src); | |
1091 | ||
1092 | l2cap_chan_add(conn, sk, NULL); | |
1093 | ||
1094 | sk->sk_state = BT_CONNECT; | |
1095 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1096 | ||
1097 | if (hcon->state == BT_CONNECTED) { | |
bd3c9e25 GP |
1098 | if (sk->sk_type != SOCK_SEQPACKET && |
1099 | sk->sk_type != SOCK_STREAM) { | |
1da177e4 LT |
1100 | l2cap_sock_clear_timer(sk); |
1101 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
1102 | } else |
1103 | l2cap_do_start(sk); | |
1da177e4 LT |
1104 | } |
1105 | ||
1106 | done: | |
1107 | hci_dev_unlock_bh(hdev); | |
1108 | hci_dev_put(hdev); | |
1109 | return err; | |
1110 | } | |
1111 | ||
1112 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
1113 | { | |
1da177e4 | 1114 | struct sock *sk = sock->sk; |
f29972de MH |
1115 | struct sockaddr_l2 la; |
1116 | int len, err = 0; | |
1da177e4 | 1117 | |
1da177e4 LT |
1118 | BT_DBG("sk %p", sk); |
1119 | ||
6503d961 CG |
1120 | if (!addr || alen < sizeof(addr->sa_family) || |
1121 | addr->sa_family != AF_BLUETOOTH) | |
2a517ca6 | 1122 | return -EINVAL; |
1da177e4 | 1123 | |
f29972de MH |
1124 | memset(&la, 0, sizeof(la)); |
1125 | len = min_t(unsigned int, sizeof(la), alen); | |
1126 | memcpy(&la, addr, len); | |
1127 | ||
2a517ca6 MH |
1128 | if (la.l2_cid) |
1129 | return -EINVAL; | |
1130 | ||
1131 | lock_sock(sk); | |
1132 | ||
bd3c9e25 GP |
1133 | if ((sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) |
1134 | && !la.l2_psm) { | |
1da177e4 LT |
1135 | err = -EINVAL; |
1136 | goto done; | |
1137 | } | |
1138 | ||
c6b03cf9 MH |
1139 | switch (l2cap_pi(sk)->mode) { |
1140 | case L2CAP_MODE_BASIC: | |
1141 | break; | |
1142 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1143 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1144 | if (enable_ertm) |
1145 | break; | |
1146 | /* fall through */ | |
1147 | default: | |
1148 | err = -ENOTSUPP; | |
1149 | goto done; | |
1150 | } | |
1151 | ||
af05b30b | 1152 | switch (sk->sk_state) { |
1da177e4 LT |
1153 | case BT_CONNECT: |
1154 | case BT_CONNECT2: | |
1155 | case BT_CONFIG: | |
1156 | /* Already connecting */ | |
1157 | goto wait; | |
1158 | ||
1159 | case BT_CONNECTED: | |
1160 | /* Already connected */ | |
8b0dc6dc | 1161 | err = -EISCONN; |
1da177e4 LT |
1162 | goto done; |
1163 | ||
1164 | case BT_OPEN: | |
1165 | case BT_BOUND: | |
1166 | /* Can connect */ | |
1167 | break; | |
1168 | ||
1169 | default: | |
1170 | err = -EBADFD; | |
1171 | goto done; | |
1172 | } | |
1173 | ||
1174 | /* Set destination address and psm */ | |
f29972de MH |
1175 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
1176 | l2cap_pi(sk)->psm = la.l2_psm; | |
1da177e4 | 1177 | |
af05b30b GP |
1178 | err = l2cap_do_connect(sk); |
1179 | if (err) | |
1da177e4 LT |
1180 | goto done; |
1181 | ||
1182 | wait: | |
1183 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
1184 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
1185 | done: | |
1186 | release_sock(sk); | |
1187 | return err; | |
1188 | } | |
1189 | ||
1190 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
1191 | { | |
1192 | struct sock *sk = sock->sk; | |
1193 | int err = 0; | |
1194 | ||
1195 | BT_DBG("sk %p backlog %d", sk, backlog); | |
1196 | ||
1197 | lock_sock(sk); | |
1198 | ||
bd3c9e25 GP |
1199 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) |
1200 | || sk->sk_state != BT_BOUND) { | |
1da177e4 LT |
1201 | err = -EBADFD; |
1202 | goto done; | |
1203 | } | |
1204 | ||
c6b03cf9 MH |
1205 | switch (l2cap_pi(sk)->mode) { |
1206 | case L2CAP_MODE_BASIC: | |
1207 | break; | |
1208 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1209 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1210 | if (enable_ertm) |
1211 | break; | |
1212 | /* fall through */ | |
1213 | default: | |
1214 | err = -ENOTSUPP; | |
1215 | goto done; | |
1216 | } | |
1217 | ||
1da177e4 LT |
1218 | if (!l2cap_pi(sk)->psm) { |
1219 | bdaddr_t *src = &bt_sk(sk)->src; | |
1220 | u16 psm; | |
1221 | ||
1222 | err = -EINVAL; | |
1223 | ||
1224 | write_lock_bh(&l2cap_sk_list.lock); | |
1225 | ||
1226 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
b4324b5d MH |
1227 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
1228 | l2cap_pi(sk)->psm = cpu_to_le16(psm); | |
1229 | l2cap_pi(sk)->sport = cpu_to_le16(psm); | |
1da177e4 LT |
1230 | err = 0; |
1231 | break; | |
1232 | } | |
1233 | ||
1234 | write_unlock_bh(&l2cap_sk_list.lock); | |
1235 | ||
1236 | if (err < 0) | |
1237 | goto done; | |
1238 | } | |
1239 | ||
1240 | sk->sk_max_ack_backlog = backlog; | |
1241 | sk->sk_ack_backlog = 0; | |
1242 | sk->sk_state = BT_LISTEN; | |
1243 | ||
1244 | done: | |
1245 | release_sock(sk); | |
1246 | return err; | |
1247 | } | |
1248 | ||
1249 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
1250 | { | |
1251 | DECLARE_WAITQUEUE(wait, current); | |
1252 | struct sock *sk = sock->sk, *nsk; | |
1253 | long timeo; | |
1254 | int err = 0; | |
1255 | ||
fcc70d5f | 1256 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1257 | |
1258 | if (sk->sk_state != BT_LISTEN) { | |
1259 | err = -EBADFD; | |
1260 | goto done; | |
1261 | } | |
1262 | ||
1263 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1264 | ||
1265 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1266 | ||
1267 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 1268 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
1da177e4 LT |
1269 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { |
1270 | set_current_state(TASK_INTERRUPTIBLE); | |
1271 | if (!timeo) { | |
1272 | err = -EAGAIN; | |
1273 | break; | |
1274 | } | |
1275 | ||
1276 | release_sock(sk); | |
1277 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1278 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1279 | |
1280 | if (sk->sk_state != BT_LISTEN) { | |
1281 | err = -EBADFD; | |
1282 | break; | |
1283 | } | |
1284 | ||
1285 | if (signal_pending(current)) { | |
1286 | err = sock_intr_errno(timeo); | |
1287 | break; | |
1288 | } | |
1289 | } | |
1290 | set_current_state(TASK_RUNNING); | |
aa395145 | 1291 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
1292 | |
1293 | if (err) | |
1294 | goto done; | |
1295 | ||
1296 | newsock->state = SS_CONNECTED; | |
1297 | ||
1298 | BT_DBG("new socket %p", nsk); | |
1299 | ||
1300 | done: | |
1301 | release_sock(sk); | |
1302 | return err; | |
1303 | } | |
1304 | ||
1305 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1306 | { | |
1307 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1308 | struct sock *sk = sock->sk; | |
1309 | ||
1310 | BT_DBG("sock %p, sk %p", sock, sk); | |
1311 | ||
1312 | addr->sa_family = AF_BLUETOOTH; | |
1313 | *len = sizeof(struct sockaddr_l2); | |
1314 | ||
f29972de MH |
1315 | if (peer) { |
1316 | la->l2_psm = l2cap_pi(sk)->psm; | |
1da177e4 | 1317 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
b4324b5d | 1318 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
f29972de MH |
1319 | } else { |
1320 | la->l2_psm = l2cap_pi(sk)->sport; | |
1da177e4 | 1321 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
b4324b5d | 1322 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
f29972de | 1323 | } |
1da177e4 | 1324 | |
1da177e4 LT |
1325 | return 0; |
1326 | } | |
1327 | ||
6161c038 GP |
1328 | static int __l2cap_wait_ack(struct sock *sk) |
1329 | { | |
1330 | DECLARE_WAITQUEUE(wait, current); | |
1331 | int err = 0; | |
1332 | int timeo = HZ/5; | |
1333 | ||
2b0b05dd | 1334 | add_wait_queue(sk_sleep(sk), &wait); |
6161c038 GP |
1335 | while ((l2cap_pi(sk)->unacked_frames > 0 && l2cap_pi(sk)->conn)) { |
1336 | set_current_state(TASK_INTERRUPTIBLE); | |
1337 | ||
1338 | if (!timeo) | |
1339 | timeo = HZ/5; | |
1340 | ||
1341 | if (signal_pending(current)) { | |
1342 | err = sock_intr_errno(timeo); | |
1343 | break; | |
1344 | } | |
1345 | ||
1346 | release_sock(sk); | |
1347 | timeo = schedule_timeout(timeo); | |
1348 | lock_sock(sk); | |
1349 | ||
1350 | err = sock_error(sk); | |
1351 | if (err) | |
1352 | break; | |
1353 | } | |
1354 | set_current_state(TASK_RUNNING); | |
2b0b05dd | 1355 | remove_wait_queue(sk_sleep(sk), &wait); |
6161c038 GP |
1356 | return err; |
1357 | } | |
1358 | ||
e90bac06 GP |
1359 | static void l2cap_monitor_timeout(unsigned long arg) |
1360 | { | |
1361 | struct sock *sk = (void *) arg; | |
e90bac06 | 1362 | |
0e98958d GP |
1363 | BT_DBG("sk %p", sk); |
1364 | ||
e686219a | 1365 | bh_lock_sock(sk); |
e90bac06 | 1366 | if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { |
9b108fc0 | 1367 | l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk, ECONNABORTED); |
b13f5860 | 1368 | bh_unlock_sock(sk); |
e90bac06 GP |
1369 | return; |
1370 | } | |
1371 | ||
1372 | l2cap_pi(sk)->retry_count++; | |
1373 | __mod_monitor_timer(); | |
1374 | ||
a2e12a2a | 1375 | l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL); |
e686219a | 1376 | bh_unlock_sock(sk); |
e90bac06 GP |
1377 | } |
1378 | ||
1379 | static void l2cap_retrans_timeout(unsigned long arg) | |
1380 | { | |
1381 | struct sock *sk = (void *) arg; | |
e90bac06 | 1382 | |
0e98958d GP |
1383 | BT_DBG("sk %p", sk); |
1384 | ||
e686219a | 1385 | bh_lock_sock(sk); |
e90bac06 GP |
1386 | l2cap_pi(sk)->retry_count = 1; |
1387 | __mod_monitor_timer(); | |
1388 | ||
1389 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
1390 | ||
a2e12a2a | 1391 | l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL); |
e686219a | 1392 | bh_unlock_sock(sk); |
e90bac06 GP |
1393 | } |
1394 | ||
1c2acffb | 1395 | static void l2cap_drop_acked_frames(struct sock *sk) |
1da177e4 | 1396 | { |
1c2acffb | 1397 | struct sk_buff *skb; |
1da177e4 | 1398 | |
812e737e GP |
1399 | while ((skb = skb_peek(TX_QUEUE(sk))) && |
1400 | l2cap_pi(sk)->unacked_frames) { | |
1c2acffb GP |
1401 | if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq) |
1402 | break; | |
1da177e4 | 1403 | |
1c2acffb GP |
1404 | skb = skb_dequeue(TX_QUEUE(sk)); |
1405 | kfree_skb(skb); | |
1da177e4 | 1406 | |
1c2acffb GP |
1407 | l2cap_pi(sk)->unacked_frames--; |
1408 | } | |
1da177e4 | 1409 | |
e90bac06 GP |
1410 | if (!l2cap_pi(sk)->unacked_frames) |
1411 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
1c2acffb | 1412 | } |
1da177e4 | 1413 | |
9a9c6a34 | 1414 | static inline void l2cap_do_send(struct sock *sk, struct sk_buff *skb) |
1c2acffb GP |
1415 | { |
1416 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1c2acffb GP |
1417 | |
1418 | BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len); | |
1da177e4 | 1419 | |
9a9c6a34 | 1420 | hci_send_acl(pi->conn->hcon, skb, 0); |
1c2acffb GP |
1421 | } |
1422 | ||
305682e8 | 1423 | static void l2cap_streaming_send(struct sock *sk) |
6840ed07 GP |
1424 | { |
1425 | struct sk_buff *skb, *tx_skb; | |
1426 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1427 | u16 control, fcs; |
6840ed07 GP |
1428 | |
1429 | while ((skb = sk->sk_send_head)) { | |
1430 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1431 | ||
1432 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
1433 | control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; | |
1434 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1435 | ||
e8235c6b | 1436 | if (pi->fcs == L2CAP_FCS_CRC16) { |
fcc203c3 GP |
1437 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); |
1438 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1439 | } | |
1440 | ||
9a9c6a34 | 1441 | l2cap_do_send(sk, tx_skb); |
6840ed07 GP |
1442 | |
1443 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1444 | ||
1445 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1446 | sk->sk_send_head = NULL; | |
1447 | else | |
1448 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
1449 | ||
1450 | skb = skb_dequeue(TX_QUEUE(sk)); | |
1451 | kfree_skb(skb); | |
1452 | } | |
6840ed07 GP |
1453 | } |
1454 | ||
dfc909be | 1455 | static void l2cap_retransmit_one_frame(struct sock *sk, u8 tx_seq) |
8f17154f GP |
1456 | { |
1457 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1458 | struct sk_buff *skb, *tx_skb; | |
1459 | u16 control, fcs; | |
8f17154f GP |
1460 | |
1461 | skb = skb_peek(TX_QUEUE(sk)); | |
f11d676d GP |
1462 | if (!skb) |
1463 | return; | |
8f17154f | 1464 | |
f11d676d GP |
1465 | do { |
1466 | if (bt_cb(skb)->tx_seq == tx_seq) | |
8f17154f | 1467 | break; |
8f17154f | 1468 | |
f11d676d GP |
1469 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
1470 | return; | |
8f17154f | 1471 | |
f11d676d | 1472 | } while ((skb = skb_queue_next(TX_QUEUE(sk), skb))); |
8f17154f | 1473 | |
f11d676d GP |
1474 | if (pi->remote_max_tx && |
1475 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
9b108fc0 | 1476 | l2cap_send_disconn_req(pi->conn, sk, ECONNABORTED); |
f11d676d GP |
1477 | return; |
1478 | } | |
1479 | ||
1480 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1481 | bt_cb(skb)->retries++; | |
1482 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
3cb123d1 GP |
1483 | |
1484 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { | |
1485 | control |= L2CAP_CTRL_FINAL; | |
1486 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
1487 | } | |
95ffa978 | 1488 | |
f11d676d GP |
1489 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
1490 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); | |
3cb123d1 | 1491 | |
f11d676d GP |
1492 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
1493 | ||
1494 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
1495 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1496 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1497 | } | |
1498 | ||
1499 | l2cap_do_send(sk, tx_skb); | |
8f17154f GP |
1500 | } |
1501 | ||
1c2acffb GP |
1502 | static int l2cap_ertm_send(struct sock *sk) |
1503 | { | |
1504 | struct sk_buff *skb, *tx_skb; | |
1505 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1506 | u16 control, fcs; |
9a9c6a34 | 1507 | int nsent = 0; |
1c2acffb | 1508 | |
c13ffa62 GP |
1509 | if (sk->sk_state != BT_CONNECTED) |
1510 | return -ENOTCONN; | |
e90bac06 | 1511 | |
6e2b6722 | 1512 | while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk))) { |
1c2acffb | 1513 | |
e90bac06 GP |
1514 | if (pi->remote_max_tx && |
1515 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
9b108fc0 | 1516 | l2cap_send_disconn_req(pi->conn, sk, ECONNABORTED); |
e90bac06 GP |
1517 | break; |
1518 | } | |
1519 | ||
e420aba3 AE |
1520 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
1521 | ||
e90bac06 GP |
1522 | bt_cb(skb)->retries++; |
1523 | ||
1c2acffb | 1524 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
95ffa978 GP |
1525 | control &= L2CAP_CTRL_SAR; |
1526 | ||
d5392c8f GP |
1527 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
1528 | control |= L2CAP_CTRL_FINAL; | |
1529 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
1530 | } | |
9f121a5a | 1531 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
1c2acffb GP |
1532 | | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
1533 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1534 | ||
e90bac06 | 1535 | |
e8235c6b | 1536 | if (pi->fcs == L2CAP_FCS_CRC16) { |
fcc203c3 GP |
1537 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); |
1538 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); | |
1539 | } | |
1540 | ||
9a9c6a34 GP |
1541 | l2cap_do_send(sk, tx_skb); |
1542 | ||
e90bac06 | 1543 | __mod_retrans_timer(); |
1c2acffb GP |
1544 | |
1545 | bt_cb(skb)->tx_seq = pi->next_tx_seq; | |
1546 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1547 | ||
1548 | pi->unacked_frames++; | |
d5392c8f | 1549 | pi->frames_sent++; |
1c2acffb GP |
1550 | |
1551 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1552 | sk->sk_send_head = NULL; | |
1553 | else | |
1554 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
9e917af1 GP |
1555 | |
1556 | nsent++; | |
1c2acffb GP |
1557 | } |
1558 | ||
9e917af1 GP |
1559 | return nsent; |
1560 | } | |
1561 | ||
dfc909be GP |
1562 | static int l2cap_retransmit_frames(struct sock *sk) |
1563 | { | |
1564 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1565 | int ret; | |
1566 | ||
dfc909be GP |
1567 | if (!skb_queue_empty(TX_QUEUE(sk))) |
1568 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
1569 | ||
1570 | pi->next_tx_seq = pi->expected_ack_seq; | |
1571 | ret = l2cap_ertm_send(sk); | |
dfc909be GP |
1572 | return ret; |
1573 | } | |
1574 | ||
9a9c6a34 | 1575 | static void l2cap_send_ack(struct l2cap_pinfo *pi) |
9e917af1 GP |
1576 | { |
1577 | struct sock *sk = (struct sock *)pi; | |
1578 | u16 control = 0; | |
1579 | ||
1580 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
1581 | ||
1582 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
1583 | control |= L2CAP_SUPER_RCV_NOT_READY; | |
1890d36b | 1584 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
9a9c6a34 GP |
1585 | l2cap_send_sframe(pi, control); |
1586 | return; | |
9e917af1 | 1587 | } |
dfc909be | 1588 | |
e0f66218 | 1589 | if (l2cap_ertm_send(sk) > 0) |
dfc909be GP |
1590 | return; |
1591 | ||
1592 | control |= L2CAP_SUPER_RCV_READY; | |
1593 | l2cap_send_sframe(pi, control); | |
1c2acffb GP |
1594 | } |
1595 | ||
9a9c6a34 | 1596 | static void l2cap_send_srejtail(struct sock *sk) |
99b0d4b7 GP |
1597 | { |
1598 | struct srej_list *tail; | |
1599 | u16 control; | |
1600 | ||
1601 | control = L2CAP_SUPER_SELECT_REJECT; | |
1602 | control |= L2CAP_CTRL_FINAL; | |
1603 | ||
1604 | tail = list_entry(SREJ_LIST(sk)->prev, struct srej_list, list); | |
1605 | control |= tail->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
1606 | ||
1607 | l2cap_send_sframe(l2cap_pi(sk), control); | |
99b0d4b7 GP |
1608 | } |
1609 | ||
1c2acffb GP |
1610 | static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb) |
1611 | { | |
1612 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1613 | struct sk_buff **frag; | |
1614 | int err, sent = 0; | |
1da177e4 | 1615 | |
59203a21 | 1616 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
1c2acffb | 1617 | return -EFAULT; |
1da177e4 LT |
1618 | |
1619 | sent += count; | |
1620 | len -= count; | |
1621 | ||
1622 | /* Continuation fragments (no L2CAP header) */ | |
1623 | frag = &skb_shinfo(skb)->frag_list; | |
1624 | while (len) { | |
1625 | count = min_t(unsigned int, conn->mtu, len); | |
1626 | ||
1627 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1628 | if (!*frag) | |
1c2acffb GP |
1629 | return -EFAULT; |
1630 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) | |
1631 | return -EFAULT; | |
1da177e4 LT |
1632 | |
1633 | sent += count; | |
1634 | len -= count; | |
1635 | ||
1636 | frag = &(*frag)->next; | |
1637 | } | |
1da177e4 LT |
1638 | |
1639 | return sent; | |
1c2acffb | 1640 | } |
1da177e4 | 1641 | |
1c2acffb GP |
1642 | static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
1643 | { | |
1644 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1645 | struct sk_buff *skb; | |
1646 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1647 | struct l2cap_hdr *lh; | |
1648 | ||
1649 | BT_DBG("sk %p len %d", sk, (int)len); | |
1650 | ||
1651 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1652 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1653 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1654 | if (!skb) | |
1655 | return ERR_PTR(-ENOMEM); | |
1656 | ||
1657 | /* Create L2CAP header */ | |
1658 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1659 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1660 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1661 | put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2)); | |
1662 | ||
1663 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1664 | if (unlikely(err < 0)) { | |
1665 | kfree_skb(skb); | |
1666 | return ERR_PTR(err); | |
1667 | } | |
1668 | return skb; | |
1669 | } | |
1670 | ||
1671 | static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len) | |
1672 | { | |
1673 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1674 | struct sk_buff *skb; | |
1675 | int err, count, hlen = L2CAP_HDR_SIZE; | |
1676 | struct l2cap_hdr *lh; | |
1677 | ||
1678 | BT_DBG("sk %p len %d", sk, (int)len); | |
1679 | ||
1680 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1681 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1682 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1683 | if (!skb) | |
1684 | return ERR_PTR(-ENOMEM); | |
1685 | ||
1686 | /* Create L2CAP header */ | |
1687 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1688 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1689 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1690 | ||
1691 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1692 | if (unlikely(err < 0)) { | |
1693 | kfree_skb(skb); | |
1694 | return ERR_PTR(err); | |
1695 | } | |
1696 | return skb; | |
1697 | } | |
1698 | ||
6840ed07 | 1699 | static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
1c2acffb GP |
1700 | { |
1701 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1702 | struct sk_buff *skb; | |
1703 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1704 | struct l2cap_hdr *lh; | |
1705 | ||
1706 | BT_DBG("sk %p len %d", sk, (int)len); | |
1707 | ||
0ee0d208 GP |
1708 | if (!conn) |
1709 | return ERR_PTR(-ENOTCONN); | |
1710 | ||
c74e560c GP |
1711 | if (sdulen) |
1712 | hlen += 2; | |
1713 | ||
fcc203c3 GP |
1714 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1715 | hlen += 2; | |
1716 | ||
1c2acffb GP |
1717 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
1718 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1719 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1720 | if (!skb) | |
1721 | return ERR_PTR(-ENOMEM); | |
1722 | ||
1723 | /* Create L2CAP header */ | |
1724 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1725 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1726 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1727 | put_unaligned_le16(control, skb_put(skb, 2)); | |
c74e560c GP |
1728 | if (sdulen) |
1729 | put_unaligned_le16(sdulen, skb_put(skb, 2)); | |
1c2acffb GP |
1730 | |
1731 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1732 | if (unlikely(err < 0)) { | |
1733 | kfree_skb(skb); | |
1734 | return ERR_PTR(err); | |
1735 | } | |
e90bac06 | 1736 | |
fcc203c3 GP |
1737 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1738 | put_unaligned_le16(0, skb_put(skb, 2)); | |
1739 | ||
e90bac06 | 1740 | bt_cb(skb)->retries = 0; |
1c2acffb | 1741 | return skb; |
1da177e4 LT |
1742 | } |
1743 | ||
c74e560c GP |
1744 | static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len) |
1745 | { | |
1746 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1747 | struct sk_buff *skb; | |
1748 | struct sk_buff_head sar_queue; | |
1749 | u16 control; | |
1750 | size_t size = 0; | |
1751 | ||
ff12fd64 | 1752 | skb_queue_head_init(&sar_queue); |
c74e560c | 1753 | control = L2CAP_SDU_START; |
1c762159 | 1754 | skb = l2cap_create_iframe_pdu(sk, msg, pi->remote_mps, control, len); |
c74e560c GP |
1755 | if (IS_ERR(skb)) |
1756 | return PTR_ERR(skb); | |
1757 | ||
1758 | __skb_queue_tail(&sar_queue, skb); | |
1c762159 GP |
1759 | len -= pi->remote_mps; |
1760 | size += pi->remote_mps; | |
c74e560c GP |
1761 | |
1762 | while (len > 0) { | |
1763 | size_t buflen; | |
1764 | ||
1c762159 | 1765 | if (len > pi->remote_mps) { |
44651b85 | 1766 | control = L2CAP_SDU_CONTINUE; |
1c762159 | 1767 | buflen = pi->remote_mps; |
c74e560c | 1768 | } else { |
44651b85 | 1769 | control = L2CAP_SDU_END; |
c74e560c GP |
1770 | buflen = len; |
1771 | } | |
1772 | ||
6840ed07 | 1773 | skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0); |
c74e560c GP |
1774 | if (IS_ERR(skb)) { |
1775 | skb_queue_purge(&sar_queue); | |
1776 | return PTR_ERR(skb); | |
1777 | } | |
1778 | ||
1779 | __skb_queue_tail(&sar_queue, skb); | |
1780 | len -= buflen; | |
1781 | size += buflen; | |
c74e560c GP |
1782 | } |
1783 | skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk)); | |
1784 | if (sk->sk_send_head == NULL) | |
1785 | sk->sk_send_head = sar_queue.next; | |
1786 | ||
1787 | return size; | |
1788 | } | |
1789 | ||
1da177e4 LT |
1790 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
1791 | { | |
1792 | struct sock *sk = sock->sk; | |
1c2acffb GP |
1793 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
1794 | struct sk_buff *skb; | |
1795 | u16 control; | |
1796 | int err; | |
1da177e4 LT |
1797 | |
1798 | BT_DBG("sock %p, sk %p", sock, sk); | |
1799 | ||
c1cbe4b7 BL |
1800 | err = sock_error(sk); |
1801 | if (err) | |
1802 | return err; | |
1da177e4 LT |
1803 | |
1804 | if (msg->msg_flags & MSG_OOB) | |
1805 | return -EOPNOTSUPP; | |
1806 | ||
1da177e4 LT |
1807 | lock_sock(sk); |
1808 | ||
1c2acffb | 1809 | if (sk->sk_state != BT_CONNECTED) { |
1da177e4 | 1810 | err = -ENOTCONN; |
1c2acffb GP |
1811 | goto done; |
1812 | } | |
1da177e4 | 1813 | |
1c2acffb GP |
1814 | /* Connectionless channel */ |
1815 | if (sk->sk_type == SOCK_DGRAM) { | |
1816 | skb = l2cap_create_connless_pdu(sk, msg, len); | |
9a9c6a34 | 1817 | if (IS_ERR(skb)) { |
477fffb0 | 1818 | err = PTR_ERR(skb); |
9a9c6a34 GP |
1819 | } else { |
1820 | l2cap_do_send(sk, skb); | |
1821 | err = len; | |
1822 | } | |
1c2acffb GP |
1823 | goto done; |
1824 | } | |
1825 | ||
1826 | switch (pi->mode) { | |
1827 | case L2CAP_MODE_BASIC: | |
c69163e9 GP |
1828 | /* Check outgoing MTU */ |
1829 | if (len > pi->omtu) { | |
1830 | err = -EINVAL; | |
1831 | goto done; | |
1832 | } | |
1833 | ||
1c2acffb GP |
1834 | /* Create a basic PDU */ |
1835 | skb = l2cap_create_basic_pdu(sk, msg, len); | |
1836 | if (IS_ERR(skb)) { | |
1837 | err = PTR_ERR(skb); | |
1838 | goto done; | |
1839 | } | |
1840 | ||
9a9c6a34 GP |
1841 | l2cap_do_send(sk, skb); |
1842 | err = len; | |
1c2acffb GP |
1843 | break; |
1844 | ||
1845 | case L2CAP_MODE_ERTM: | |
6840ed07 | 1846 | case L2CAP_MODE_STREAMING: |
1c2acffb | 1847 | /* Entire SDU fits into one PDU */ |
1c762159 | 1848 | if (len <= pi->remote_mps) { |
1c2acffb | 1849 | control = L2CAP_SDU_UNSEGMENTED; |
6840ed07 | 1850 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
1c2acffb GP |
1851 | if (IS_ERR(skb)) { |
1852 | err = PTR_ERR(skb); | |
1853 | goto done; | |
1854 | } | |
c74e560c | 1855 | __skb_queue_tail(TX_QUEUE(sk), skb); |
dfc909be | 1856 | |
c74e560c GP |
1857 | if (sk->sk_send_head == NULL) |
1858 | sk->sk_send_head = skb; | |
dfc909be | 1859 | |
1c2acffb | 1860 | } else { |
c74e560c GP |
1861 | /* Segment SDU into multiples PDUs */ |
1862 | err = l2cap_sar_segment_sdu(sk, msg, len); | |
1863 | if (err < 0) | |
1864 | goto done; | |
1c2acffb | 1865 | } |
1c2acffb | 1866 | |
dfc909be | 1867 | if (pi->mode == L2CAP_MODE_STREAMING) { |
305682e8 | 1868 | l2cap_streaming_send(sk); |
dfc909be | 1869 | } else { |
6e2b6722 GP |
1870 | if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY && |
1871 | pi->conn_state && L2CAP_CONN_WAIT_F) { | |
1872 | err = len; | |
1873 | break; | |
1874 | } | |
6840ed07 | 1875 | err = l2cap_ertm_send(sk); |
dfc909be | 1876 | } |
6840ed07 | 1877 | |
9e917af1 | 1878 | if (err >= 0) |
1c2acffb GP |
1879 | err = len; |
1880 | break; | |
1881 | ||
1882 | default: | |
1883 | BT_DBG("bad state %1.1x", pi->mode); | |
1884 | err = -EINVAL; | |
1885 | } | |
1886 | ||
1887 | done: | |
1da177e4 LT |
1888 | release_sock(sk); |
1889 | return err; | |
1890 | } | |
1891 | ||
f66dc81f MH |
1892 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1893 | { | |
1894 | struct sock *sk = sock->sk; | |
1895 | ||
1896 | lock_sock(sk); | |
1897 | ||
1898 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1899 | struct l2cap_conn_rsp rsp; | |
1900 | ||
1901 | sk->sk_state = BT_CONFIG; | |
1902 | ||
1903 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1904 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1905 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1906 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1907 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1908 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1909 | ||
1910 | release_sock(sk); | |
1911 | return 0; | |
1912 | } | |
1913 | ||
1914 | release_sock(sk); | |
1915 | ||
1916 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1917 | } | |
1918 | ||
b7058842 | 1919 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
1920 | { |
1921 | struct sock *sk = sock->sk; | |
1922 | struct l2cap_options opts; | |
f29972de | 1923 | int len, err = 0; |
1da177e4 LT |
1924 | u32 opt; |
1925 | ||
1926 | BT_DBG("sk %p", sk); | |
1927 | ||
1928 | lock_sock(sk); | |
1929 | ||
1930 | switch (optname) { | |
1931 | case L2CAP_OPTIONS: | |
0878b666 MH |
1932 | opts.imtu = l2cap_pi(sk)->imtu; |
1933 | opts.omtu = l2cap_pi(sk)->omtu; | |
1934 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1935 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1936 | opts.fcs = l2cap_pi(sk)->fcs; |
68d7f0ce | 1937 | opts.max_tx = l2cap_pi(sk)->max_tx; |
14b5aa71 | 1938 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
0878b666 | 1939 | |
1da177e4 LT |
1940 | len = min_t(unsigned int, sizeof(opts), optlen); |
1941 | if (copy_from_user((char *) &opts, optval, len)) { | |
1942 | err = -EFAULT; | |
1943 | break; | |
1944 | } | |
0878b666 | 1945 | |
45d65c46 GP |
1946 | if (opts.txwin_size > L2CAP_DEFAULT_TX_WINDOW) { |
1947 | err = -EINVAL; | |
1948 | break; | |
1949 | } | |
1950 | ||
0041ecfa JPRV |
1951 | l2cap_pi(sk)->mode = opts.mode; |
1952 | switch (l2cap_pi(sk)->mode) { | |
1953 | case L2CAP_MODE_BASIC: | |
85eb53c6 | 1954 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_STATE2_DEVICE; |
0041ecfa JPRV |
1955 | break; |
1956 | case L2CAP_MODE_ERTM: | |
1957 | case L2CAP_MODE_STREAMING: | |
1958 | if (enable_ertm) | |
1959 | break; | |
1960 | /* fall through */ | |
1961 | default: | |
1962 | err = -EINVAL; | |
1963 | break; | |
1964 | } | |
1965 | ||
c6b03cf9 MH |
1966 | l2cap_pi(sk)->imtu = opts.imtu; |
1967 | l2cap_pi(sk)->omtu = opts.omtu; | |
fcc203c3 | 1968 | l2cap_pi(sk)->fcs = opts.fcs; |
68d7f0ce | 1969 | l2cap_pi(sk)->max_tx = opts.max_tx; |
14b5aa71 | 1970 | l2cap_pi(sk)->tx_win = (__u8)opts.txwin_size; |
1da177e4 LT |
1971 | break; |
1972 | ||
1973 | case L2CAP_LM: | |
1974 | if (get_user(opt, (u32 __user *) optval)) { | |
1975 | err = -EFAULT; | |
1976 | break; | |
1977 | } | |
1978 | ||
2af6b9d5 MH |
1979 | if (opt & L2CAP_LM_AUTH) |
1980 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
1981 | if (opt & L2CAP_LM_ENCRYPT) | |
1982 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
1983 | if (opt & L2CAP_LM_SECURE) | |
1984 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
1985 | ||
1986 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
1987 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
1988 | break; |
1989 | ||
1990 | default: | |
1991 | err = -ENOPROTOOPT; | |
1992 | break; | |
1993 | } | |
1994 | ||
1995 | release_sock(sk); | |
1996 | return err; | |
1997 | } | |
1998 | ||
b7058842 | 1999 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
d58daf42 MH |
2000 | { |
2001 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
2002 | struct bt_security sec; |
2003 | int len, err = 0; | |
f66dc81f | 2004 | u32 opt; |
d58daf42 MH |
2005 | |
2006 | BT_DBG("sk %p", sk); | |
2007 | ||
2008 | if (level == SOL_L2CAP) | |
2009 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
2010 | ||
0588d94f MH |
2011 | if (level != SOL_BLUETOOTH) |
2012 | return -ENOPROTOOPT; | |
2013 | ||
d58daf42 MH |
2014 | lock_sock(sk); |
2015 | ||
2016 | switch (optname) { | |
2af6b9d5 | 2017 | case BT_SECURITY: |
bd3c9e25 GP |
2018 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
2019 | && sk->sk_type != SOCK_RAW) { | |
0588d94f MH |
2020 | err = -EINVAL; |
2021 | break; | |
2022 | } | |
2023 | ||
2af6b9d5 MH |
2024 | sec.level = BT_SECURITY_LOW; |
2025 | ||
2026 | len = min_t(unsigned int, sizeof(sec), optlen); | |
2027 | if (copy_from_user((char *) &sec, optval, len)) { | |
2028 | err = -EFAULT; | |
2029 | break; | |
2030 | } | |
2031 | ||
2032 | if (sec.level < BT_SECURITY_LOW || | |
2033 | sec.level > BT_SECURITY_HIGH) { | |
2034 | err = -EINVAL; | |
2035 | break; | |
2036 | } | |
2037 | ||
2038 | l2cap_pi(sk)->sec_level = sec.level; | |
2039 | break; | |
2040 | ||
f66dc81f MH |
2041 | case BT_DEFER_SETUP: |
2042 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
2043 | err = -EINVAL; | |
2044 | break; | |
2045 | } | |
2046 | ||
2047 | if (get_user(opt, (u32 __user *) optval)) { | |
2048 | err = -EFAULT; | |
2049 | break; | |
2050 | } | |
2051 | ||
2052 | bt_sk(sk)->defer_setup = opt; | |
2053 | break; | |
2054 | ||
d58daf42 MH |
2055 | default: |
2056 | err = -ENOPROTOOPT; | |
2057 | break; | |
2058 | } | |
2059 | ||
2060 | release_sock(sk); | |
2061 | return err; | |
2062 | } | |
2063 | ||
2064 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
2065 | { |
2066 | struct sock *sk = sock->sk; | |
2067 | struct l2cap_options opts; | |
2068 | struct l2cap_conninfo cinfo; | |
2069 | int len, err = 0; | |
2af6b9d5 | 2070 | u32 opt; |
1da177e4 LT |
2071 | |
2072 | BT_DBG("sk %p", sk); | |
2073 | ||
2074 | if (get_user(len, optlen)) | |
2075 | return -EFAULT; | |
2076 | ||
2077 | lock_sock(sk); | |
2078 | ||
2079 | switch (optname) { | |
2080 | case L2CAP_OPTIONS: | |
2081 | opts.imtu = l2cap_pi(sk)->imtu; | |
2082 | opts.omtu = l2cap_pi(sk)->omtu; | |
2083 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 2084 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 2085 | opts.fcs = l2cap_pi(sk)->fcs; |
68d7f0ce | 2086 | opts.max_tx = l2cap_pi(sk)->max_tx; |
14b5aa71 | 2087 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
1da177e4 LT |
2088 | |
2089 | len = min_t(unsigned int, len, sizeof(opts)); | |
2090 | if (copy_to_user(optval, (char *) &opts, len)) | |
2091 | err = -EFAULT; | |
2092 | ||
2093 | break; | |
2094 | ||
2095 | case L2CAP_LM: | |
2af6b9d5 MH |
2096 | switch (l2cap_pi(sk)->sec_level) { |
2097 | case BT_SECURITY_LOW: | |
2098 | opt = L2CAP_LM_AUTH; | |
2099 | break; | |
2100 | case BT_SECURITY_MEDIUM: | |
2101 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
2102 | break; | |
2103 | case BT_SECURITY_HIGH: | |
2104 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2105 | L2CAP_LM_SECURE; | |
2106 | break; | |
2107 | default: | |
2108 | opt = 0; | |
2109 | break; | |
2110 | } | |
2111 | ||
2112 | if (l2cap_pi(sk)->role_switch) | |
2113 | opt |= L2CAP_LM_MASTER; | |
2114 | ||
2115 | if (l2cap_pi(sk)->force_reliable) | |
2116 | opt |= L2CAP_LM_RELIABLE; | |
2117 | ||
2118 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
2119 | err = -EFAULT; |
2120 | break; | |
2121 | ||
2122 | case L2CAP_CONNINFO: | |
f66dc81f MH |
2123 | if (sk->sk_state != BT_CONNECTED && |
2124 | !(sk->sk_state == BT_CONNECT2 && | |
2125 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
2126 | err = -ENOTCONN; |
2127 | break; | |
2128 | } | |
2129 | ||
2130 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
2131 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
2132 | ||
2133 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
2134 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
2135 | err = -EFAULT; | |
2136 | ||
2137 | break; | |
2138 | ||
2139 | default: | |
2140 | err = -ENOPROTOOPT; | |
2141 | break; | |
2142 | } | |
2143 | ||
2144 | release_sock(sk); | |
2145 | return err; | |
2146 | } | |
2147 | ||
d58daf42 MH |
2148 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
2149 | { | |
2150 | struct sock *sk = sock->sk; | |
2af6b9d5 | 2151 | struct bt_security sec; |
d58daf42 MH |
2152 | int len, err = 0; |
2153 | ||
2154 | BT_DBG("sk %p", sk); | |
2155 | ||
2156 | if (level == SOL_L2CAP) | |
2157 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
2158 | ||
0588d94f MH |
2159 | if (level != SOL_BLUETOOTH) |
2160 | return -ENOPROTOOPT; | |
2161 | ||
d58daf42 MH |
2162 | if (get_user(len, optlen)) |
2163 | return -EFAULT; | |
2164 | ||
2165 | lock_sock(sk); | |
2166 | ||
2167 | switch (optname) { | |
2af6b9d5 | 2168 | case BT_SECURITY: |
bd3c9e25 GP |
2169 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
2170 | && sk->sk_type != SOCK_RAW) { | |
0588d94f MH |
2171 | err = -EINVAL; |
2172 | break; | |
2173 | } | |
2174 | ||
2af6b9d5 MH |
2175 | sec.level = l2cap_pi(sk)->sec_level; |
2176 | ||
2177 | len = min_t(unsigned int, len, sizeof(sec)); | |
2178 | if (copy_to_user(optval, (char *) &sec, len)) | |
2179 | err = -EFAULT; | |
2180 | ||
2181 | break; | |
2182 | ||
f66dc81f MH |
2183 | case BT_DEFER_SETUP: |
2184 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
2185 | err = -EINVAL; | |
2186 | break; | |
2187 | } | |
2188 | ||
2189 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
2190 | err = -EFAULT; | |
2191 | ||
2192 | break; | |
2193 | ||
d58daf42 MH |
2194 | default: |
2195 | err = -ENOPROTOOPT; | |
2196 | break; | |
2197 | } | |
2198 | ||
2199 | release_sock(sk); | |
2200 | return err; | |
2201 | } | |
2202 | ||
1da177e4 LT |
2203 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
2204 | { | |
2205 | struct sock *sk = sock->sk; | |
2206 | int err = 0; | |
2207 | ||
2208 | BT_DBG("sock %p, sk %p", sock, sk); | |
2209 | ||
2210 | if (!sk) | |
2211 | return 0; | |
2212 | ||
2213 | lock_sock(sk); | |
2214 | if (!sk->sk_shutdown) { | |
6161c038 GP |
2215 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
2216 | err = __l2cap_wait_ack(sk); | |
2217 | ||
1da177e4 LT |
2218 | sk->sk_shutdown = SHUTDOWN_MASK; |
2219 | l2cap_sock_clear_timer(sk); | |
2220 | __l2cap_sock_close(sk, 0); | |
2221 | ||
2222 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
2223 | err = bt_sock_wait_state(sk, BT_CLOSED, |
2224 | sk->sk_lingertime); | |
1da177e4 | 2225 | } |
9b108fc0 GP |
2226 | |
2227 | if (!err && sk->sk_err) | |
2228 | err = -sk->sk_err; | |
2229 | ||
1da177e4 LT |
2230 | release_sock(sk); |
2231 | return err; | |
2232 | } | |
2233 | ||
2234 | static int l2cap_sock_release(struct socket *sock) | |
2235 | { | |
2236 | struct sock *sk = sock->sk; | |
2237 | int err; | |
2238 | ||
2239 | BT_DBG("sock %p, sk %p", sock, sk); | |
2240 | ||
2241 | if (!sk) | |
2242 | return 0; | |
2243 | ||
2244 | err = l2cap_sock_shutdown(sock, 2); | |
2245 | ||
2246 | sock_orphan(sk); | |
2247 | l2cap_sock_kill(sk); | |
2248 | return err; | |
2249 | } | |
2250 | ||
1da177e4 LT |
2251 | static void l2cap_chan_ready(struct sock *sk) |
2252 | { | |
2253 | struct sock *parent = bt_sk(sk)->parent; | |
2254 | ||
2255 | BT_DBG("sk %p, parent %p", sk, parent); | |
2256 | ||
2257 | l2cap_pi(sk)->conf_state = 0; | |
2258 | l2cap_sock_clear_timer(sk); | |
2259 | ||
2260 | if (!parent) { | |
2261 | /* Outgoing channel. | |
2262 | * Wake up socket sleeping on connect. | |
2263 | */ | |
2264 | sk->sk_state = BT_CONNECTED; | |
2265 | sk->sk_state_change(sk); | |
2266 | } else { | |
2267 | /* Incoming channel. | |
2268 | * Wake up socket sleeping on accept. | |
2269 | */ | |
2270 | parent->sk_data_ready(parent, 0); | |
2271 | } | |
2272 | } | |
2273 | ||
2274 | /* Copy frame to all raw sockets on that connection */ | |
2275 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
2276 | { | |
2277 | struct l2cap_chan_list *l = &conn->chan_list; | |
2278 | struct sk_buff *nskb; | |
af05b30b | 2279 | struct sock *sk; |
1da177e4 LT |
2280 | |
2281 | BT_DBG("conn %p", conn); | |
2282 | ||
2283 | read_lock(&l->lock); | |
2284 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2285 | if (sk->sk_type != SOCK_RAW) | |
2286 | continue; | |
2287 | ||
2288 | /* Don't send frame to the socket it came from */ | |
2289 | if (skb->sk == sk) | |
2290 | continue; | |
af05b30b GP |
2291 | nskb = skb_clone(skb, GFP_ATOMIC); |
2292 | if (!nskb) | |
1da177e4 LT |
2293 | continue; |
2294 | ||
2295 | if (sock_queue_rcv_skb(sk, nskb)) | |
2296 | kfree_skb(nskb); | |
2297 | } | |
2298 | read_unlock(&l->lock); | |
2299 | } | |
2300 | ||
2301 | /* ---- L2CAP signalling commands ---- */ | |
2302 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
2303 | u8 code, u8 ident, u16 dlen, void *data) | |
2304 | { | |
2305 | struct sk_buff *skb, **frag; | |
2306 | struct l2cap_cmd_hdr *cmd; | |
2307 | struct l2cap_hdr *lh; | |
2308 | int len, count; | |
2309 | ||
af05b30b GP |
2310 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
2311 | conn, code, ident, dlen); | |
1da177e4 LT |
2312 | |
2313 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
2314 | count = min_t(unsigned int, conn->mtu, len); | |
2315 | ||
2316 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
2317 | if (!skb) | |
2318 | return NULL; | |
2319 | ||
2320 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c | 2321 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
8db4dc46 | 2322 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
1da177e4 LT |
2323 | |
2324 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
2325 | cmd->code = code; | |
2326 | cmd->ident = ident; | |
aca3192c | 2327 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
2328 | |
2329 | if (dlen) { | |
2330 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
2331 | memcpy(skb_put(skb, count), data, count); | |
2332 | data += count; | |
2333 | } | |
2334 | ||
2335 | len -= skb->len; | |
2336 | ||
2337 | /* Continuation fragments (no L2CAP header) */ | |
2338 | frag = &skb_shinfo(skb)->frag_list; | |
2339 | while (len) { | |
2340 | count = min_t(unsigned int, conn->mtu, len); | |
2341 | ||
2342 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
2343 | if (!*frag) | |
2344 | goto fail; | |
2345 | ||
2346 | memcpy(skb_put(*frag, count), data, count); | |
2347 | ||
2348 | len -= count; | |
2349 | data += count; | |
2350 | ||
2351 | frag = &(*frag)->next; | |
2352 | } | |
2353 | ||
2354 | return skb; | |
2355 | ||
2356 | fail: | |
2357 | kfree_skb(skb); | |
2358 | return NULL; | |
2359 | } | |
2360 | ||
2361 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
2362 | { | |
2363 | struct l2cap_conf_opt *opt = *ptr; | |
2364 | int len; | |
2365 | ||
2366 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
2367 | *ptr += len; | |
2368 | ||
2369 | *type = opt->type; | |
2370 | *olen = opt->len; | |
2371 | ||
2372 | switch (opt->len) { | |
2373 | case 1: | |
2374 | *val = *((u8 *) opt->val); | |
2375 | break; | |
2376 | ||
2377 | case 2: | |
861d6882 | 2378 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
2379 | break; |
2380 | ||
2381 | case 4: | |
861d6882 | 2382 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
2383 | break; |
2384 | ||
2385 | default: | |
2386 | *val = (unsigned long) opt->val; | |
2387 | break; | |
2388 | } | |
2389 | ||
2390 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
2391 | return len; | |
2392 | } | |
2393 | ||
1da177e4 LT |
2394 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
2395 | { | |
2396 | struct l2cap_conf_opt *opt = *ptr; | |
2397 | ||
2398 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
2399 | ||
2400 | opt->type = type; | |
2401 | opt->len = len; | |
2402 | ||
2403 | switch (len) { | |
2404 | case 1: | |
2405 | *((u8 *) opt->val) = val; | |
2406 | break; | |
2407 | ||
2408 | case 2: | |
8e036fc3 | 2409 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
2410 | break; |
2411 | ||
2412 | case 4: | |
8e036fc3 | 2413 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
2414 | break; |
2415 | ||
2416 | default: | |
2417 | memcpy(opt->val, (void *) val, len); | |
2418 | break; | |
2419 | } | |
2420 | ||
2421 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
2422 | } | |
2423 | ||
c1b4f43b GP |
2424 | static void l2cap_ack_timeout(unsigned long arg) |
2425 | { | |
2426 | struct sock *sk = (void *) arg; | |
2427 | ||
2428 | bh_lock_sock(sk); | |
2429 | l2cap_send_ack(l2cap_pi(sk)); | |
2430 | bh_unlock_sock(sk); | |
2431 | } | |
2432 | ||
0565c1c2 GP |
2433 | static inline void l2cap_ertm_init(struct sock *sk) |
2434 | { | |
2435 | l2cap_pi(sk)->expected_ack_seq = 0; | |
2436 | l2cap_pi(sk)->unacked_frames = 0; | |
2437 | l2cap_pi(sk)->buffer_seq = 0; | |
803020c6 | 2438 | l2cap_pi(sk)->num_acked = 0; |
d5392c8f | 2439 | l2cap_pi(sk)->frames_sent = 0; |
0565c1c2 GP |
2440 | |
2441 | setup_timer(&l2cap_pi(sk)->retrans_timer, | |
2442 | l2cap_retrans_timeout, (unsigned long) sk); | |
2443 | setup_timer(&l2cap_pi(sk)->monitor_timer, | |
2444 | l2cap_monitor_timeout, (unsigned long) sk); | |
c1b4f43b GP |
2445 | setup_timer(&l2cap_pi(sk)->ack_timer, |
2446 | l2cap_ack_timeout, (unsigned long) sk); | |
0565c1c2 GP |
2447 | |
2448 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b GP |
2449 | __skb_queue_head_init(BUSY_QUEUE(sk)); |
2450 | ||
2451 | INIT_WORK(&l2cap_pi(sk)->busy_work, l2cap_busy_work); | |
218bb9df GP |
2452 | |
2453 | sk->sk_backlog_rcv = l2cap_ertm_data_rcv; | |
0565c1c2 GP |
2454 | } |
2455 | ||
f2fcfcd6 GP |
2456 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
2457 | { | |
2458 | switch (mode) { | |
2459 | case L2CAP_MODE_STREAMING: | |
2460 | case L2CAP_MODE_ERTM: | |
2461 | if (l2cap_mode_supported(mode, remote_feat_mask)) | |
2462 | return mode; | |
2463 | /* fall through */ | |
2464 | default: | |
2465 | return L2CAP_MODE_BASIC; | |
2466 | } | |
2467 | } | |
2468 | ||
1da177e4 LT |
2469 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
2470 | { | |
2471 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2472 | struct l2cap_conf_req *req = data; | |
bd3c9e25 | 2473 | struct l2cap_conf_rfc rfc = { .mode = pi->mode }; |
1da177e4 LT |
2474 | void *ptr = req->data; |
2475 | ||
2476 | BT_DBG("sk %p", sk); | |
2477 | ||
f2fcfcd6 GP |
2478 | if (pi->num_conf_req || pi->num_conf_rsp) |
2479 | goto done; | |
2480 | ||
2481 | switch (pi->mode) { | |
2482 | case L2CAP_MODE_STREAMING: | |
2483 | case L2CAP_MODE_ERTM: | |
2ba13ed6 | 2484 | if (pi->conf_state & L2CAP_CONF_STATE2_DEVICE) |
85eb53c6 | 2485 | break; |
85eb53c6 | 2486 | |
2ba13ed6 | 2487 | /* fall through */ |
f2fcfcd6 GP |
2488 | default: |
2489 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2490 | break; | |
2491 | } | |
2492 | ||
2493 | done: | |
65c7c491 MH |
2494 | switch (pi->mode) { |
2495 | case L2CAP_MODE_BASIC: | |
2496 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
2497 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
62547752 GP |
2498 | |
2499 | rfc.mode = L2CAP_MODE_BASIC; | |
2500 | rfc.txwin_size = 0; | |
2501 | rfc.max_transmit = 0; | |
2502 | rfc.retrans_timeout = 0; | |
2503 | rfc.monitor_timeout = 0; | |
2504 | rfc.max_pdu_size = 0; | |
2505 | ||
65c7c491 MH |
2506 | break; |
2507 | ||
2508 | case L2CAP_MODE_ERTM: | |
2509 | rfc.mode = L2CAP_MODE_ERTM; | |
14b5aa71 | 2510 | rfc.txwin_size = pi->tx_win; |
68d7f0ce | 2511 | rfc.max_transmit = pi->max_tx; |
f2fcfcd6 GP |
2512 | rfc.retrans_timeout = 0; |
2513 | rfc.monitor_timeout = 0; | |
c74e560c | 2514 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
d1daa091 | 2515 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
1c762159 | 2516 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
f2fcfcd6 | 2517 | |
fcc203c3 GP |
2518 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
2519 | break; | |
2520 | ||
2521 | if (pi->fcs == L2CAP_FCS_NONE || | |
2522 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2523 | pi->fcs = L2CAP_FCS_NONE; | |
2524 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2525 | } | |
f2fcfcd6 GP |
2526 | break; |
2527 | ||
2528 | case L2CAP_MODE_STREAMING: | |
2529 | rfc.mode = L2CAP_MODE_STREAMING; | |
2530 | rfc.txwin_size = 0; | |
2531 | rfc.max_transmit = 0; | |
2532 | rfc.retrans_timeout = 0; | |
2533 | rfc.monitor_timeout = 0; | |
c74e560c | 2534 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
d1daa091 | 2535 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
1c762159 | 2536 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
65c7c491 | 2537 | |
fcc203c3 GP |
2538 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
2539 | break; | |
2540 | ||
2541 | if (pi->fcs == L2CAP_FCS_NONE || | |
2542 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2543 | pi->fcs = L2CAP_FCS_NONE; | |
2544 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2545 | } | |
65c7c491 MH |
2546 | break; |
2547 | } | |
1da177e4 | 2548 | |
62547752 GP |
2549 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
2550 | (unsigned long) &rfc); | |
2551 | ||
1da177e4 LT |
2552 | /* FIXME: Need actual value of the flush timeout */ |
2553 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
2554 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
2555 | ||
aca3192c YH |
2556 | req->dcid = cpu_to_le16(pi->dcid); |
2557 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
2558 | |
2559 | return ptr - data; | |
2560 | } | |
2561 | ||
5dee9e7c | 2562 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
2563 | { |
2564 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
2565 | struct l2cap_conf_rsp *rsp = data; |
2566 | void *ptr = rsp->data; | |
2567 | void *req = pi->conf_req; | |
2568 | int len = pi->conf_len; | |
2569 | int type, hint, olen; | |
2570 | unsigned long val; | |
6464f35f | 2571 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 2572 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 2573 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 2574 | |
5dee9e7c | 2575 | BT_DBG("sk %p", sk); |
820ae1b8 | 2576 | |
5dee9e7c MH |
2577 | while (len >= L2CAP_CONF_OPT_SIZE) { |
2578 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 2579 | |
589d2746 | 2580 | hint = type & L2CAP_CONF_HINT; |
47ec1dcd | 2581 | type &= L2CAP_CONF_MASK; |
5dee9e7c MH |
2582 | |
2583 | switch (type) { | |
2584 | case L2CAP_CONF_MTU: | |
861d6882 | 2585 | mtu = val; |
5dee9e7c MH |
2586 | break; |
2587 | ||
2588 | case L2CAP_CONF_FLUSH_TO: | |
2589 | pi->flush_to = val; | |
2590 | break; | |
2591 | ||
2592 | case L2CAP_CONF_QOS: | |
2593 | break; | |
2594 | ||
6464f35f MH |
2595 | case L2CAP_CONF_RFC: |
2596 | if (olen == sizeof(rfc)) | |
2597 | memcpy(&rfc, (void *) val, olen); | |
2598 | break; | |
2599 | ||
fcc203c3 GP |
2600 | case L2CAP_CONF_FCS: |
2601 | if (val == L2CAP_FCS_NONE) | |
2602 | pi->conf_state |= L2CAP_CONF_NO_FCS_RECV; | |
2603 | ||
2604 | break; | |
2605 | ||
5dee9e7c MH |
2606 | default: |
2607 | if (hint) | |
2608 | break; | |
2609 | ||
2610 | result = L2CAP_CONF_UNKNOWN; | |
2611 | *((u8 *) ptr++) = type; | |
2612 | break; | |
2613 | } | |
2614 | } | |
2615 | ||
f2fcfcd6 GP |
2616 | if (pi->num_conf_rsp || pi->num_conf_req) |
2617 | goto done; | |
2618 | ||
2619 | switch (pi->mode) { | |
2620 | case L2CAP_MODE_STREAMING: | |
2621 | case L2CAP_MODE_ERTM: | |
85eb53c6 GP |
2622 | if (!(pi->conf_state & L2CAP_CONF_STATE2_DEVICE)) { |
2623 | pi->mode = l2cap_select_mode(rfc.mode, | |
2624 | pi->conn->feat_mask); | |
2625 | break; | |
2626 | } | |
2627 | ||
742e519b | 2628 | if (pi->mode != rfc.mode) |
f2fcfcd6 | 2629 | return -ECONNREFUSED; |
742e519b | 2630 | |
f2fcfcd6 | 2631 | break; |
f2fcfcd6 GP |
2632 | } |
2633 | ||
2634 | done: | |
2635 | if (pi->mode != rfc.mode) { | |
2636 | result = L2CAP_CONF_UNACCEPT; | |
2637 | rfc.mode = pi->mode; | |
2638 | ||
2639 | if (pi->num_conf_rsp == 1) | |
2640 | return -ECONNREFUSED; | |
2641 | ||
2642 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2643 | sizeof(rfc), (unsigned long) &rfc); | |
2644 | } | |
2645 | ||
2646 | ||
5dee9e7c MH |
2647 | if (result == L2CAP_CONF_SUCCESS) { |
2648 | /* Configure output options and let the other side know | |
2649 | * which ones we don't like. */ | |
2650 | ||
f2fcfcd6 GP |
2651 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
2652 | result = L2CAP_CONF_UNACCEPT; | |
2653 | else { | |
2654 | pi->omtu = mtu; | |
2655 | pi->conf_state |= L2CAP_CONF_MTU_DONE; | |
2656 | } | |
2657 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
6464f35f | 2658 | |
f2fcfcd6 GP |
2659 | switch (rfc.mode) { |
2660 | case L2CAP_MODE_BASIC: | |
2661 | pi->fcs = L2CAP_FCS_NONE; | |
2662 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
2663 | break; | |
2664 | ||
2665 | case L2CAP_MODE_ERTM: | |
2666 | pi->remote_tx_win = rfc.txwin_size; | |
2667 | pi->remote_max_tx = rfc.max_transmit; | |
1c762159 GP |
2668 | if (rfc.max_pdu_size > pi->conn->mtu - 10) |
2669 | rfc.max_pdu_size = le16_to_cpu(pi->conn->mtu - 10); | |
2670 | ||
2671 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); | |
f2fcfcd6 | 2672 | |
10467e9e GP |
2673 | rfc.retrans_timeout = |
2674 | le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO); | |
2675 | rfc.monitor_timeout = | |
2676 | le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO); | |
f2fcfcd6 GP |
2677 | |
2678 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2679 | |
2680 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2681 | sizeof(rfc), (unsigned long) &rfc); | |
2682 | ||
f2fcfcd6 GP |
2683 | break; |
2684 | ||
2685 | case L2CAP_MODE_STREAMING: | |
1c762159 GP |
2686 | if (rfc.max_pdu_size > pi->conn->mtu - 10) |
2687 | rfc.max_pdu_size = le16_to_cpu(pi->conn->mtu - 10); | |
2688 | ||
2689 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); | |
f2fcfcd6 GP |
2690 | |
2691 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2692 | |
2693 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2694 | sizeof(rfc), (unsigned long) &rfc); | |
2695 | ||
f2fcfcd6 GP |
2696 | break; |
2697 | ||
2698 | default: | |
5dee9e7c | 2699 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 2700 | |
6464f35f | 2701 | memset(&rfc, 0, sizeof(rfc)); |
f2fcfcd6 GP |
2702 | rfc.mode = pi->mode; |
2703 | } | |
6464f35f | 2704 | |
f2fcfcd6 GP |
2705 | if (result == L2CAP_CONF_SUCCESS) |
2706 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
2707 | } | |
5dee9e7c MH |
2708 | rsp->scid = cpu_to_le16(pi->dcid); |
2709 | rsp->result = cpu_to_le16(result); | |
2710 | rsp->flags = cpu_to_le16(0x0000); | |
2711 | ||
2712 | return ptr - data; | |
1da177e4 LT |
2713 | } |
2714 | ||
f2fcfcd6 GP |
2715 | static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result) |
2716 | { | |
2717 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2718 | struct l2cap_conf_req *req = data; | |
2719 | void *ptr = req->data; | |
2720 | int type, olen; | |
2721 | unsigned long val; | |
2722 | struct l2cap_conf_rfc rfc; | |
2723 | ||
2724 | BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data); | |
2725 | ||
2726 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2727 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2728 | ||
2729 | switch (type) { | |
2730 | case L2CAP_CONF_MTU: | |
2731 | if (val < L2CAP_DEFAULT_MIN_MTU) { | |
2732 | *result = L2CAP_CONF_UNACCEPT; | |
2733 | pi->omtu = L2CAP_DEFAULT_MIN_MTU; | |
2734 | } else | |
2735 | pi->omtu = val; | |
2736 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
2737 | break; | |
2738 | ||
2739 | case L2CAP_CONF_FLUSH_TO: | |
2740 | pi->flush_to = val; | |
2741 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, | |
2742 | 2, pi->flush_to); | |
2743 | break; | |
2744 | ||
2745 | case L2CAP_CONF_RFC: | |
2746 | if (olen == sizeof(rfc)) | |
2747 | memcpy(&rfc, (void *)val, olen); | |
2748 | ||
2749 | if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) && | |
2750 | rfc.mode != pi->mode) | |
2751 | return -ECONNREFUSED; | |
2752 | ||
f2fcfcd6 GP |
2753 | pi->fcs = 0; |
2754 | ||
2755 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2756 | sizeof(rfc), (unsigned long) &rfc); | |
2757 | break; | |
2758 | } | |
2759 | } | |
2760 | ||
6c2ea7a8 GP |
2761 | if (pi->mode == L2CAP_MODE_BASIC && pi->mode != rfc.mode) |
2762 | return -ECONNREFUSED; | |
2763 | ||
2764 | pi->mode = rfc.mode; | |
2765 | ||
f2fcfcd6 GP |
2766 | if (*result == L2CAP_CONF_SUCCESS) { |
2767 | switch (rfc.mode) { | |
2768 | case L2CAP_MODE_ERTM: | |
2769 | pi->remote_tx_win = rfc.txwin_size; | |
10467e9e GP |
2770 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
2771 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); | |
1c762159 | 2772 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
f2fcfcd6 GP |
2773 | break; |
2774 | case L2CAP_MODE_STREAMING: | |
1c762159 | 2775 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
f2fcfcd6 GP |
2776 | } |
2777 | } | |
2778 | ||
2779 | req->dcid = cpu_to_le16(pi->dcid); | |
2780 | req->flags = cpu_to_le16(0x0000); | |
2781 | ||
2782 | return ptr - data; | |
2783 | } | |
2784 | ||
5dee9e7c | 2785 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
2786 | { |
2787 | struct l2cap_conf_rsp *rsp = data; | |
2788 | void *ptr = rsp->data; | |
1da177e4 | 2789 | |
5dee9e7c | 2790 | BT_DBG("sk %p", sk); |
1da177e4 | 2791 | |
aca3192c | 2792 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 2793 | rsp->result = cpu_to_le16(result); |
aca3192c | 2794 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
2795 | |
2796 | return ptr - data; | |
2797 | } | |
2798 | ||
7b1c0049 GP |
2799 | static void l2cap_conf_rfc_get(struct sock *sk, void *rsp, int len) |
2800 | { | |
2801 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2802 | int type, olen; | |
2803 | unsigned long val; | |
2804 | struct l2cap_conf_rfc rfc; | |
2805 | ||
2806 | BT_DBG("sk %p, rsp %p, len %d", sk, rsp, len); | |
2807 | ||
2808 | if ((pi->mode != L2CAP_MODE_ERTM) && (pi->mode != L2CAP_MODE_STREAMING)) | |
2809 | return; | |
2810 | ||
2811 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2812 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2813 | ||
2814 | switch (type) { | |
2815 | case L2CAP_CONF_RFC: | |
2816 | if (olen == sizeof(rfc)) | |
2817 | memcpy(&rfc, (void *)val, olen); | |
2818 | goto done; | |
2819 | } | |
2820 | } | |
2821 | ||
2822 | done: | |
2823 | switch (rfc.mode) { | |
2824 | case L2CAP_MODE_ERTM: | |
2825 | pi->remote_tx_win = rfc.txwin_size; | |
10467e9e GP |
2826 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
2827 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); | |
7b1c0049 GP |
2828 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
2829 | break; | |
2830 | case L2CAP_MODE_STREAMING: | |
2831 | pi->mps = le16_to_cpu(rfc.max_pdu_size); | |
2832 | } | |
2833 | } | |
2834 | ||
4e8402a3 MH |
2835 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2836 | { | |
2837 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
2838 | ||
2839 | if (rej->reason != 0x0000) | |
2840 | return 0; | |
2841 | ||
2842 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
2843 | cmd->ident == conn->info_ident) { | |
4e8402a3 | 2844 | del_timer(&conn->info_timer); |
984947dc MH |
2845 | |
2846 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
e1027a7c | 2847 | conn->info_ident = 0; |
984947dc | 2848 | |
4e8402a3 MH |
2849 | l2cap_conn_start(conn); |
2850 | } | |
2851 | ||
2852 | return 0; | |
2853 | } | |
2854 | ||
1da177e4 LT |
2855 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2856 | { | |
2857 | struct l2cap_chan_list *list = &conn->chan_list; | |
2858 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
2859 | struct l2cap_conn_rsp rsp; | |
2860 | struct sock *sk, *parent; | |
e7c29cb1 | 2861 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
2862 | |
2863 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 2864 | __le16 psm = req->psm; |
1da177e4 LT |
2865 | |
2866 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
2867 | ||
2868 | /* Check if we have socket listening on psm */ | |
2869 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
2870 | if (!parent) { | |
2871 | result = L2CAP_CR_BAD_PSM; | |
2872 | goto sendresp; | |
2873 | } | |
2874 | ||
e7c29cb1 MH |
2875 | /* Check if the ACL is secure enough (if not SDP) */ |
2876 | if (psm != cpu_to_le16(0x0001) && | |
2877 | !hci_conn_check_link_mode(conn->hcon)) { | |
2950f21a | 2878 | conn->disc_reason = 0x05; |
e7c29cb1 MH |
2879 | result = L2CAP_CR_SEC_BLOCK; |
2880 | goto response; | |
2881 | } | |
2882 | ||
1da177e4 LT |
2883 | result = L2CAP_CR_NO_MEM; |
2884 | ||
2885 | /* Check for backlog size */ | |
2886 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 2887 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
2888 | goto response; |
2889 | } | |
2890 | ||
3b1e0a65 | 2891 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
2892 | if (!sk) |
2893 | goto response; | |
2894 | ||
fd1278d7 | 2895 | write_lock_bh(&list->lock); |
1da177e4 LT |
2896 | |
2897 | /* Check if we already have channel with that dcid */ | |
2898 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 2899 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2900 | sock_set_flag(sk, SOCK_ZAPPED); |
2901 | l2cap_sock_kill(sk); | |
2902 | goto response; | |
2903 | } | |
2904 | ||
2905 | hci_conn_hold(conn->hcon); | |
2906 | ||
2907 | l2cap_sock_init(sk, parent); | |
2908 | bacpy(&bt_sk(sk)->src, conn->src); | |
2909 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
2910 | l2cap_pi(sk)->psm = psm; | |
2911 | l2cap_pi(sk)->dcid = scid; | |
2912 | ||
2913 | __l2cap_chan_add(conn, sk, parent); | |
2914 | dcid = l2cap_pi(sk)->scid; | |
2915 | ||
2916 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
2917 | ||
1da177e4 LT |
2918 | l2cap_pi(sk)->ident = cmd->ident; |
2919 | ||
984947dc | 2920 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
2af6b9d5 | 2921 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
2922 | if (bt_sk(sk)->defer_setup) { |
2923 | sk->sk_state = BT_CONNECT2; | |
2924 | result = L2CAP_CR_PEND; | |
2925 | status = L2CAP_CS_AUTHOR_PEND; | |
2926 | parent->sk_data_ready(parent, 0); | |
2927 | } else { | |
2928 | sk->sk_state = BT_CONFIG; | |
2929 | result = L2CAP_CR_SUCCESS; | |
2930 | status = L2CAP_CS_NO_INFO; | |
2931 | } | |
79d554a6 MH |
2932 | } else { |
2933 | sk->sk_state = BT_CONNECT2; | |
2934 | result = L2CAP_CR_PEND; | |
2935 | status = L2CAP_CS_AUTHEN_PEND; | |
2936 | } | |
2937 | } else { | |
2938 | sk->sk_state = BT_CONNECT2; | |
2939 | result = L2CAP_CR_PEND; | |
2940 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
2941 | } |
2942 | ||
fd1278d7 | 2943 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2944 | |
2945 | response: | |
2946 | bh_unlock_sock(parent); | |
2947 | ||
2948 | sendresp: | |
aca3192c YH |
2949 | rsp.scid = cpu_to_le16(scid); |
2950 | rsp.dcid = cpu_to_le16(dcid); | |
2951 | rsp.result = cpu_to_le16(result); | |
2952 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 2953 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
2954 | |
2955 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
2956 | struct l2cap_info_req info; | |
2957 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2958 | ||
2959 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
2960 | conn->info_ident = l2cap_get_ident(conn); | |
2961 | ||
2962 | mod_timer(&conn->info_timer, jiffies + | |
2963 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
2964 | ||
2965 | l2cap_send_cmd(conn, conn->info_ident, | |
2966 | L2CAP_INFO_REQ, sizeof(info), &info); | |
2967 | } | |
2968 | ||
1da177e4 LT |
2969 | return 0; |
2970 | } | |
2971 | ||
2972 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2973 | { | |
2974 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
2975 | u16 scid, dcid, result, status; | |
2976 | struct sock *sk; | |
2977 | u8 req[128]; | |
2978 | ||
2979 | scid = __le16_to_cpu(rsp->scid); | |
2980 | dcid = __le16_to_cpu(rsp->dcid); | |
2981 | result = __le16_to_cpu(rsp->result); | |
2982 | status = __le16_to_cpu(rsp->status); | |
2983 | ||
2984 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
2985 | ||
2986 | if (scid) { | |
af05b30b GP |
2987 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2988 | if (!sk) | |
1da177e4 LT |
2989 | return 0; |
2990 | } else { | |
af05b30b GP |
2991 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
2992 | if (!sk) | |
1da177e4 LT |
2993 | return 0; |
2994 | } | |
2995 | ||
2996 | switch (result) { | |
2997 | case L2CAP_CR_SUCCESS: | |
2998 | sk->sk_state = BT_CONFIG; | |
2999 | l2cap_pi(sk)->ident = 0; | |
3000 | l2cap_pi(sk)->dcid = dcid; | |
3001 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
6a8d3010 MH |
3002 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
3003 | ||
1da177e4 LT |
3004 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
3005 | l2cap_build_conf_req(sk, req), req); | |
f2fcfcd6 | 3006 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
3007 | break; |
3008 | ||
3009 | case L2CAP_CR_PEND: | |
6a8d3010 | 3010 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 LT |
3011 | break; |
3012 | ||
3013 | default: | |
3014 | l2cap_chan_del(sk, ECONNREFUSED); | |
3015 | break; | |
3016 | } | |
3017 | ||
3018 | bh_unlock_sock(sk); | |
3019 | return 0; | |
3020 | } | |
3021 | ||
88219a0f | 3022 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
3023 | { |
3024 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
3025 | u16 dcid, flags; | |
3026 | u8 rsp[64]; | |
3027 | struct sock *sk; | |
5dee9e7c | 3028 | int len; |
1da177e4 LT |
3029 | |
3030 | dcid = __le16_to_cpu(req->dcid); | |
3031 | flags = __le16_to_cpu(req->flags); | |
3032 | ||
3033 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
3034 | ||
af05b30b GP |
3035 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
3036 | if (!sk) | |
1da177e4 LT |
3037 | return -ENOENT; |
3038 | ||
8cb8e6f1 GP |
3039 | if (sk->sk_state != BT_CONFIG) { |
3040 | struct l2cap_cmd_rej rej; | |
3041 | ||
3042 | rej.reason = cpu_to_le16(0x0002); | |
3043 | l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, | |
3044 | sizeof(rej), &rej); | |
354f60a9 | 3045 | goto unlock; |
8cb8e6f1 | 3046 | } |
354f60a9 | 3047 | |
5dee9e7c | 3048 | /* Reject if config buffer is too small. */ |
88219a0f | 3049 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
3050 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
3051 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
3052 | l2cap_build_conf_rsp(sk, rsp, | |
3053 | L2CAP_CONF_REJECT, flags), rsp); | |
3054 | goto unlock; | |
3055 | } | |
3056 | ||
3057 | /* Store config. */ | |
3058 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
3059 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
3060 | |
3061 | if (flags & 0x0001) { | |
3062 | /* Incomplete config. Send empty response. */ | |
3063 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
3064 | l2cap_build_conf_rsp(sk, rsp, |
3065 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
3066 | goto unlock; |
3067 | } | |
3068 | ||
3069 | /* Complete config. */ | |
5dee9e7c | 3070 | len = l2cap_parse_conf_req(sk, rsp); |
f2fcfcd6 | 3071 | if (len < 0) { |
9b108fc0 | 3072 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
1da177e4 | 3073 | goto unlock; |
f2fcfcd6 | 3074 | } |
1da177e4 | 3075 | |
5dee9e7c | 3076 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
f2fcfcd6 | 3077 | l2cap_pi(sk)->num_conf_rsp++; |
5dee9e7c | 3078 | |
5dee9e7c MH |
3079 | /* Reset config buffer. */ |
3080 | l2cap_pi(sk)->conf_len = 0; | |
3081 | ||
876d9484 MH |
3082 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
3083 | goto unlock; | |
3084 | ||
1da177e4 | 3085 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
f64f9e71 JP |
3086 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
3087 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
fcc203c3 GP |
3088 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
3089 | ||
1da177e4 | 3090 | sk->sk_state = BT_CONNECTED; |
e90bac06 | 3091 | |
0565c1c2 GP |
3092 | l2cap_pi(sk)->next_tx_seq = 0; |
3093 | l2cap_pi(sk)->expected_tx_seq = 0; | |
1c2acffb | 3094 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
3095 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
3096 | l2cap_ertm_init(sk); | |
3097 | ||
1da177e4 | 3098 | l2cap_chan_ready(sk); |
876d9484 MH |
3099 | goto unlock; |
3100 | } | |
3101 | ||
3102 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 3103 | u8 buf[64]; |
1da177e4 | 3104 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 3105 | l2cap_build_conf_req(sk, buf), buf); |
f2fcfcd6 | 3106 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
3107 | } |
3108 | ||
3109 | unlock: | |
3110 | bh_unlock_sock(sk); | |
3111 | return 0; | |
3112 | } | |
3113 | ||
3114 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3115 | { | |
3116 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
3117 | u16 scid, flags, result; | |
3118 | struct sock *sk; | |
7b1c0049 | 3119 | int len = cmd->len - sizeof(*rsp); |
1da177e4 LT |
3120 | |
3121 | scid = __le16_to_cpu(rsp->scid); | |
3122 | flags = __le16_to_cpu(rsp->flags); | |
3123 | result = __le16_to_cpu(rsp->result); | |
3124 | ||
af05b30b GP |
3125 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
3126 | scid, flags, result); | |
1da177e4 | 3127 | |
af05b30b GP |
3128 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
3129 | if (!sk) | |
1da177e4 LT |
3130 | return 0; |
3131 | ||
3132 | switch (result) { | |
3133 | case L2CAP_CONF_SUCCESS: | |
7b1c0049 | 3134 | l2cap_conf_rfc_get(sk, rsp->data, len); |
1da177e4 LT |
3135 | break; |
3136 | ||
3137 | case L2CAP_CONF_UNACCEPT: | |
f2fcfcd6 | 3138 | if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
f2fcfcd6 GP |
3139 | char req[64]; |
3140 | ||
c2c77ec8 | 3141 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
9b108fc0 | 3142 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
c2c77ec8 AE |
3143 | goto done; |
3144 | } | |
3145 | ||
f2fcfcd6 GP |
3146 | /* throw out any old stored conf requests */ |
3147 | result = L2CAP_CONF_SUCCESS; | |
3148 | len = l2cap_parse_conf_rsp(sk, rsp->data, | |
3149 | len, req, &result); | |
3150 | if (len < 0) { | |
9b108fc0 | 3151 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
f2fcfcd6 GP |
3152 | goto done; |
3153 | } | |
3154 | ||
3155 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
3156 | L2CAP_CONF_REQ, len, req); | |
3157 | l2cap_pi(sk)->num_conf_req++; | |
3158 | if (result != L2CAP_CONF_SUCCESS) | |
3159 | goto done; | |
3160 | break; | |
1da177e4 LT |
3161 | } |
3162 | ||
8e87d142 | 3163 | default: |
b1235d79 | 3164 | sk->sk_err = ECONNRESET; |
1da177e4 | 3165 | l2cap_sock_set_timer(sk, HZ * 5); |
9b108fc0 | 3166 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
1da177e4 LT |
3167 | goto done; |
3168 | } | |
3169 | ||
3170 | if (flags & 0x01) | |
3171 | goto done; | |
3172 | ||
1da177e4 LT |
3173 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
3174 | ||
3175 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
f64f9e71 JP |
3176 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
3177 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
fcc203c3 GP |
3178 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
3179 | ||
1da177e4 | 3180 | sk->sk_state = BT_CONNECTED; |
0565c1c2 | 3181 | l2cap_pi(sk)->next_tx_seq = 0; |
1c2acffb | 3182 | l2cap_pi(sk)->expected_tx_seq = 0; |
1c2acffb | 3183 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
3184 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
3185 | l2cap_ertm_init(sk); | |
3186 | ||
1da177e4 LT |
3187 | l2cap_chan_ready(sk); |
3188 | } | |
3189 | ||
3190 | done: | |
3191 | bh_unlock_sock(sk); | |
3192 | return 0; | |
3193 | } | |
3194 | ||
3195 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3196 | { | |
3197 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
3198 | struct l2cap_disconn_rsp rsp; | |
3199 | u16 dcid, scid; | |
3200 | struct sock *sk; | |
3201 | ||
3202 | scid = __le16_to_cpu(req->scid); | |
3203 | dcid = __le16_to_cpu(req->dcid); | |
3204 | ||
3205 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
3206 | ||
af05b30b GP |
3207 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
3208 | if (!sk) | |
1da177e4 LT |
3209 | return 0; |
3210 | ||
aca3192c YH |
3211 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
3212 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
3213 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
3214 | ||
3215 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3216 | ||
3217 | l2cap_chan_del(sk, ECONNRESET); | |
3218 | bh_unlock_sock(sk); | |
3219 | ||
3220 | l2cap_sock_kill(sk); | |
3221 | return 0; | |
3222 | } | |
3223 | ||
3224 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3225 | { | |
3226 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
3227 | u16 dcid, scid; | |
3228 | struct sock *sk; | |
3229 | ||
3230 | scid = __le16_to_cpu(rsp->scid); | |
3231 | dcid = __le16_to_cpu(rsp->dcid); | |
3232 | ||
3233 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
3234 | ||
af05b30b GP |
3235 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
3236 | if (!sk) | |
1da177e4 LT |
3237 | return 0; |
3238 | ||
3239 | l2cap_chan_del(sk, 0); | |
3240 | bh_unlock_sock(sk); | |
3241 | ||
3242 | l2cap_sock_kill(sk); | |
3243 | return 0; | |
3244 | } | |
3245 | ||
3246 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3247 | { | |
3248 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
3249 | u16 type; |
3250 | ||
3251 | type = __le16_to_cpu(req->type); | |
3252 | ||
3253 | BT_DBG("type 0x%4.4x", type); | |
3254 | ||
f0709e03 MH |
3255 | if (type == L2CAP_IT_FEAT_MASK) { |
3256 | u8 buf[8]; | |
44dd46de | 3257 | u32 feat_mask = l2cap_feat_mask; |
f0709e03 MH |
3258 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
3259 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
3260 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
44dd46de | 3261 | if (enable_ertm) |
fcc203c3 GP |
3262 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
3263 | | L2CAP_FEAT_FCS; | |
1b7bf4ed | 3264 | put_unaligned_le32(feat_mask, rsp->data); |
f0709e03 MH |
3265 | l2cap_send_cmd(conn, cmd->ident, |
3266 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
e1027a7c MH |
3267 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
3268 | u8 buf[12]; | |
3269 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
3270 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
3271 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
3272 | memcpy(buf + 4, l2cap_fixed_chan, 8); | |
3273 | l2cap_send_cmd(conn, cmd->ident, | |
3274 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
f0709e03 MH |
3275 | } else { |
3276 | struct l2cap_info_rsp rsp; | |
3277 | rsp.type = cpu_to_le16(type); | |
3278 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
3279 | l2cap_send_cmd(conn, cmd->ident, | |
3280 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
3281 | } | |
1da177e4 LT |
3282 | |
3283 | return 0; | |
3284 | } | |
3285 | ||
3286 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3287 | { | |
3288 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
3289 | u16 type, result; | |
3290 | ||
3291 | type = __le16_to_cpu(rsp->type); | |
3292 | result = __le16_to_cpu(rsp->result); | |
3293 | ||
3294 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
3295 | ||
4e8402a3 MH |
3296 | del_timer(&conn->info_timer); |
3297 | ||
984947dc | 3298 | if (type == L2CAP_IT_FEAT_MASK) { |
83985319 | 3299 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 | 3300 | |
47ec1dcd | 3301 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
e1027a7c MH |
3302 | struct l2cap_info_req req; |
3303 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
3304 | ||
3305 | conn->info_ident = l2cap_get_ident(conn); | |
3306 | ||
3307 | l2cap_send_cmd(conn, conn->info_ident, | |
3308 | L2CAP_INFO_REQ, sizeof(req), &req); | |
3309 | } else { | |
3310 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
3311 | conn->info_ident = 0; | |
3312 | ||
3313 | l2cap_conn_start(conn); | |
3314 | } | |
3315 | } else if (type == L2CAP_IT_FIXED_CHAN) { | |
984947dc | 3316 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 3317 | conn->info_ident = 0; |
984947dc MH |
3318 | |
3319 | l2cap_conn_start(conn); | |
3320 | } | |
4e8402a3 | 3321 | |
1da177e4 LT |
3322 | return 0; |
3323 | } | |
3324 | ||
3325 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
3326 | { | |
3327 | u8 *data = skb->data; | |
3328 | int len = skb->len; | |
3329 | struct l2cap_cmd_hdr cmd; | |
3330 | int err = 0; | |
3331 | ||
3332 | l2cap_raw_recv(conn, skb); | |
3333 | ||
3334 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 3335 | u16 cmd_len; |
1da177e4 LT |
3336 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
3337 | data += L2CAP_CMD_HDR_SIZE; | |
3338 | len -= L2CAP_CMD_HDR_SIZE; | |
3339 | ||
88219a0f | 3340 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 3341 | |
88219a0f | 3342 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 3343 | |
88219a0f | 3344 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
3345 | BT_DBG("corrupted command"); |
3346 | break; | |
3347 | } | |
3348 | ||
3349 | switch (cmd.code) { | |
3350 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 3351 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
3352 | break; |
3353 | ||
3354 | case L2CAP_CONN_REQ: | |
3355 | err = l2cap_connect_req(conn, &cmd, data); | |
3356 | break; | |
3357 | ||
3358 | case L2CAP_CONN_RSP: | |
3359 | err = l2cap_connect_rsp(conn, &cmd, data); | |
3360 | break; | |
3361 | ||
3362 | case L2CAP_CONF_REQ: | |
88219a0f | 3363 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
3364 | break; |
3365 | ||
3366 | case L2CAP_CONF_RSP: | |
3367 | err = l2cap_config_rsp(conn, &cmd, data); | |
3368 | break; | |
3369 | ||
3370 | case L2CAP_DISCONN_REQ: | |
3371 | err = l2cap_disconnect_req(conn, &cmd, data); | |
3372 | break; | |
3373 | ||
3374 | case L2CAP_DISCONN_RSP: | |
3375 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
3376 | break; | |
3377 | ||
3378 | case L2CAP_ECHO_REQ: | |
88219a0f | 3379 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
3380 | break; |
3381 | ||
3382 | case L2CAP_ECHO_RSP: | |
3383 | break; | |
3384 | ||
3385 | case L2CAP_INFO_REQ: | |
3386 | err = l2cap_information_req(conn, &cmd, data); | |
3387 | break; | |
3388 | ||
3389 | case L2CAP_INFO_RSP: | |
3390 | err = l2cap_information_rsp(conn, &cmd, data); | |
3391 | break; | |
3392 | ||
3393 | default: | |
3394 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
3395 | err = -EINVAL; | |
3396 | break; | |
3397 | } | |
3398 | ||
3399 | if (err) { | |
3400 | struct l2cap_cmd_rej rej; | |
3401 | BT_DBG("error %d", err); | |
3402 | ||
3403 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 3404 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
3405 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
3406 | } | |
3407 | ||
88219a0f AV |
3408 | data += cmd_len; |
3409 | len -= cmd_len; | |
1da177e4 LT |
3410 | } |
3411 | ||
3412 | kfree_skb(skb); | |
3413 | } | |
3414 | ||
fcc203c3 GP |
3415 | static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb) |
3416 | { | |
3417 | u16 our_fcs, rcv_fcs; | |
3418 | int hdr_size = L2CAP_HDR_SIZE + 2; | |
3419 | ||
3420 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
3421 | skb_trim(skb, skb->len - 2); | |
3422 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); | |
3423 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); | |
3424 | ||
3425 | if (our_fcs != rcv_fcs) | |
3426 | return -EINVAL; | |
3427 | } | |
3428 | return 0; | |
3429 | } | |
3430 | ||
d5392c8f GP |
3431 | static inline void l2cap_send_i_or_rr_or_rnr(struct sock *sk) |
3432 | { | |
3433 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3434 | u16 control = 0; | |
3435 | ||
3436 | pi->frames_sent = 0; | |
d5392c8f GP |
3437 | |
3438 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3439 | ||
3440 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
64988868 | 3441 | control |= L2CAP_SUPER_RCV_NOT_READY; |
d5392c8f | 3442 | l2cap_send_sframe(pi, control); |
1890d36b | 3443 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
d5392c8f GP |
3444 | } |
3445 | ||
4ea727ef GP |
3446 | if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY) |
3447 | l2cap_retransmit_frames(sk); | |
d5392c8f GP |
3448 | |
3449 | l2cap_ertm_send(sk); | |
3450 | ||
3451 | if (!(pi->conn_state & L2CAP_CONN_LOCAL_BUSY) && | |
3452 | pi->frames_sent == 0) { | |
3453 | control |= L2CAP_SUPER_RCV_READY; | |
d5392c8f GP |
3454 | l2cap_send_sframe(pi, control); |
3455 | } | |
3456 | } | |
3457 | ||
9b53350d | 3458 | static int l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar) |
8f17154f GP |
3459 | { |
3460 | struct sk_buff *next_skb; | |
bfbacc11 JPRV |
3461 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
3462 | int tx_seq_offset, next_tx_seq_offset; | |
8f17154f GP |
3463 | |
3464 | bt_cb(skb)->tx_seq = tx_seq; | |
3465 | bt_cb(skb)->sar = sar; | |
3466 | ||
3467 | next_skb = skb_peek(SREJ_QUEUE(sk)); | |
3468 | if (!next_skb) { | |
3469 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
9b53350d | 3470 | return 0; |
8f17154f GP |
3471 | } |
3472 | ||
bfbacc11 JPRV |
3473 | tx_seq_offset = (tx_seq - pi->buffer_seq) % 64; |
3474 | if (tx_seq_offset < 0) | |
3475 | tx_seq_offset += 64; | |
3476 | ||
8f17154f | 3477 | do { |
9b53350d JPRV |
3478 | if (bt_cb(next_skb)->tx_seq == tx_seq) |
3479 | return -EINVAL; | |
3480 | ||
bfbacc11 JPRV |
3481 | next_tx_seq_offset = (bt_cb(next_skb)->tx_seq - |
3482 | pi->buffer_seq) % 64; | |
3483 | if (next_tx_seq_offset < 0) | |
3484 | next_tx_seq_offset += 64; | |
3485 | ||
3486 | if (next_tx_seq_offset > tx_seq_offset) { | |
8f17154f | 3487 | __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb); |
9b53350d | 3488 | return 0; |
8f17154f GP |
3489 | } |
3490 | ||
3491 | if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb)) | |
3492 | break; | |
3493 | ||
59203a21 | 3494 | } while ((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb))); |
8f17154f GP |
3495 | |
3496 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
9b53350d JPRV |
3497 | |
3498 | return 0; | |
8f17154f GP |
3499 | } |
3500 | ||
18778a63 GP |
3501 | static int l2cap_ertm_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
3502 | { | |
3503 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3504 | struct sk_buff *_skb; | |
1890d36b | 3505 | int err; |
18778a63 GP |
3506 | |
3507 | switch (control & L2CAP_CTRL_SAR) { | |
3508 | case L2CAP_SDU_UNSEGMENTED: | |
3509 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) | |
3510 | goto drop; | |
3511 | ||
3512 | err = sock_queue_rcv_skb(sk, skb); | |
3513 | if (!err) | |
3514 | return err; | |
3515 | ||
3516 | break; | |
3517 | ||
3518 | case L2CAP_SDU_START: | |
3519 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) | |
3520 | goto drop; | |
3521 | ||
3522 | pi->sdu_len = get_unaligned_le16(skb->data); | |
18778a63 GP |
3523 | |
3524 | if (pi->sdu_len > pi->imtu) | |
3525 | goto disconnect; | |
3526 | ||
3527 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); | |
1890d36b GP |
3528 | if (!pi->sdu) |
3529 | return -ENOMEM; | |
3530 | ||
3531 | /* pull sdu_len bytes only after alloc, because of Local Busy | |
3532 | * condition we have to be sure that this will be executed | |
3533 | * only once, i.e., when alloc does not fail */ | |
3534 | skb_pull(skb, 2); | |
18778a63 GP |
3535 | |
3536 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3537 | ||
3538 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3539 | pi->partial_sdu_len = skb->len; | |
3540 | break; | |
3541 | ||
3542 | case L2CAP_SDU_CONTINUE: | |
3543 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3544 | goto disconnect; | |
3545 | ||
3546 | if (!pi->sdu) | |
3547 | goto disconnect; | |
3548 | ||
18778a63 GP |
3549 | pi->partial_sdu_len += skb->len; |
3550 | if (pi->partial_sdu_len > pi->sdu_len) | |
3551 | goto drop; | |
3552 | ||
4178ba46 GP |
3553 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
3554 | ||
18778a63 GP |
3555 | break; |
3556 | ||
3557 | case L2CAP_SDU_END: | |
3558 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3559 | goto disconnect; | |
3560 | ||
3561 | if (!pi->sdu) | |
3562 | goto disconnect; | |
3563 | ||
1890d36b | 3564 | if (!(pi->conn_state & L2CAP_CONN_SAR_RETRY)) { |
1890d36b | 3565 | pi->partial_sdu_len += skb->len; |
18778a63 | 3566 | |
1890d36b GP |
3567 | if (pi->partial_sdu_len > pi->imtu) |
3568 | goto drop; | |
18778a63 | 3569 | |
1890d36b GP |
3570 | if (pi->partial_sdu_len != pi->sdu_len) |
3571 | goto drop; | |
4178ba46 GP |
3572 | |
3573 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
1890d36b | 3574 | } |
18778a63 GP |
3575 | |
3576 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
1890d36b GP |
3577 | if (!_skb) { |
3578 | pi->conn_state |= L2CAP_CONN_SAR_RETRY; | |
3579 | return -ENOMEM; | |
3580 | } | |
3581 | ||
18778a63 | 3582 | err = sock_queue_rcv_skb(sk, _skb); |
1890d36b | 3583 | if (err < 0) { |
18778a63 | 3584 | kfree_skb(_skb); |
1890d36b GP |
3585 | pi->conn_state |= L2CAP_CONN_SAR_RETRY; |
3586 | return err; | |
3587 | } | |
3588 | ||
3589 | pi->conn_state &= ~L2CAP_CONN_SAR_RETRY; | |
3590 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
18778a63 GP |
3591 | |
3592 | kfree_skb(pi->sdu); | |
3593 | break; | |
3594 | } | |
3595 | ||
3596 | kfree_skb(skb); | |
1890d36b | 3597 | return 0; |
18778a63 GP |
3598 | |
3599 | drop: | |
3600 | kfree_skb(pi->sdu); | |
3601 | pi->sdu = NULL; | |
3602 | ||
3603 | disconnect: | |
9b108fc0 | 3604 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); |
18778a63 GP |
3605 | kfree_skb(skb); |
3606 | return 0; | |
3607 | } | |
3608 | ||
712132eb GP |
3609 | static int l2cap_try_push_rx_skb(struct sock *sk) |
3610 | { | |
3611 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3612 | struct sk_buff *skb; | |
3613 | u16 control; | |
3614 | int err; | |
3615 | ||
3616 | while ((skb = skb_dequeue(BUSY_QUEUE(sk)))) { | |
3617 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; | |
3618 | err = l2cap_ertm_reassembly_sdu(sk, skb, control); | |
3619 | if (err < 0) { | |
3620 | skb_queue_head(BUSY_QUEUE(sk), skb); | |
3621 | return -EBUSY; | |
3622 | } | |
3623 | ||
3624 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; | |
3625 | } | |
3626 | ||
3627 | if (!(pi->conn_state & L2CAP_CONN_RNR_SENT)) | |
3628 | goto done; | |
3629 | ||
3630 | control = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3631 | control |= L2CAP_SUPER_RCV_READY | L2CAP_CTRL_POLL; | |
3632 | l2cap_send_sframe(pi, control); | |
3633 | l2cap_pi(sk)->retry_count = 1; | |
3634 | ||
3635 | del_timer(&pi->retrans_timer); | |
3636 | __mod_monitor_timer(); | |
3637 | ||
3638 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
3639 | ||
3640 | done: | |
3641 | pi->conn_state &= ~L2CAP_CONN_LOCAL_BUSY; | |
3642 | pi->conn_state &= ~L2CAP_CONN_RNR_SENT; | |
3643 | ||
3644 | BT_DBG("sk %p, Exit local busy", sk); | |
3645 | ||
3646 | return 0; | |
3647 | } | |
3648 | ||
1890d36b GP |
3649 | static void l2cap_busy_work(struct work_struct *work) |
3650 | { | |
3651 | DECLARE_WAITQUEUE(wait, current); | |
3652 | struct l2cap_pinfo *pi = | |
3653 | container_of(work, struct l2cap_pinfo, busy_work); | |
3654 | struct sock *sk = (struct sock *)pi; | |
3655 | int n_tries = 0, timeo = HZ/5, err; | |
3656 | struct sk_buff *skb; | |
1890d36b GP |
3657 | |
3658 | lock_sock(sk); | |
3659 | ||
2b0b05dd | 3660 | add_wait_queue(sk_sleep(sk), &wait); |
1890d36b GP |
3661 | while ((skb = skb_peek(BUSY_QUEUE(sk)))) { |
3662 | set_current_state(TASK_INTERRUPTIBLE); | |
3663 | ||
3664 | if (n_tries++ > L2CAP_LOCAL_BUSY_TRIES) { | |
3665 | err = -EBUSY; | |
9b108fc0 | 3666 | l2cap_send_disconn_req(pi->conn, sk, EBUSY); |
712132eb | 3667 | break; |
1890d36b GP |
3668 | } |
3669 | ||
3670 | if (!timeo) | |
3671 | timeo = HZ/5; | |
3672 | ||
3673 | if (signal_pending(current)) { | |
3674 | err = sock_intr_errno(timeo); | |
712132eb | 3675 | break; |
1890d36b GP |
3676 | } |
3677 | ||
3678 | release_sock(sk); | |
3679 | timeo = schedule_timeout(timeo); | |
3680 | lock_sock(sk); | |
3681 | ||
3682 | err = sock_error(sk); | |
3683 | if (err) | |
712132eb | 3684 | break; |
1890d36b | 3685 | |
712132eb | 3686 | if (l2cap_try_push_rx_skb(sk) == 0) |
1890d36b GP |
3687 | break; |
3688 | } | |
3689 | ||
1890d36b | 3690 | set_current_state(TASK_RUNNING); |
2b0b05dd | 3691 | remove_wait_queue(sk_sleep(sk), &wait); |
1890d36b GP |
3692 | |
3693 | release_sock(sk); | |
3694 | } | |
3695 | ||
3696 | static int l2cap_push_rx_skb(struct sock *sk, struct sk_buff *skb, u16 control) | |
3697 | { | |
3698 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3699 | int sctrl, err; | |
3700 | ||
3701 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
3702 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; | |
3703 | __skb_queue_tail(BUSY_QUEUE(sk), skb); | |
712132eb GP |
3704 | return l2cap_try_push_rx_skb(sk); |
3705 | ||
3706 | ||
1890d36b GP |
3707 | } |
3708 | ||
3709 | err = l2cap_ertm_reassembly_sdu(sk, skb, control); | |
3710 | if (err >= 0) { | |
3711 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; | |
3712 | return err; | |
3713 | } | |
3714 | ||
3715 | /* Busy Condition */ | |
0e98958d GP |
3716 | BT_DBG("sk %p, Enter local busy", sk); |
3717 | ||
1890d36b GP |
3718 | pi->conn_state |= L2CAP_CONN_LOCAL_BUSY; |
3719 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; | |
3720 | __skb_queue_tail(BUSY_QUEUE(sk), skb); | |
3721 | ||
3722 | sctrl = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3723 | sctrl |= L2CAP_SUPER_RCV_NOT_READY; | |
3724 | l2cap_send_sframe(pi, sctrl); | |
3725 | ||
3726 | pi->conn_state |= L2CAP_CONN_RNR_SENT; | |
3727 | ||
7fe9b298 GP |
3728 | del_timer(&pi->ack_timer); |
3729 | ||
1890d36b GP |
3730 | queue_work(_busy_wq, &pi->busy_work); |
3731 | ||
3732 | return err; | |
3733 | } | |
3734 | ||
18778a63 | 3735 | static int l2cap_streaming_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
c74e560c GP |
3736 | { |
3737 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3738 | struct sk_buff *_skb; | |
3739 | int err = -EINVAL; | |
3740 | ||
18778a63 GP |
3741 | /* |
3742 | * TODO: We have to notify the userland if some data is lost with the | |
3743 | * Streaming Mode. | |
3744 | */ | |
3745 | ||
c74e560c GP |
3746 | switch (control & L2CAP_CTRL_SAR) { |
3747 | case L2CAP_SDU_UNSEGMENTED: | |
3748 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3749 | kfree_skb(pi->sdu); | |
3750 | break; | |
3751 | } | |
3752 | ||
3753 | err = sock_queue_rcv_skb(sk, skb); | |
3754 | if (!err) | |
3755 | return 0; | |
3756 | ||
3757 | break; | |
3758 | ||
3759 | case L2CAP_SDU_START: | |
3760 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3761 | kfree_skb(pi->sdu); | |
3762 | break; | |
3763 | } | |
3764 | ||
3765 | pi->sdu_len = get_unaligned_le16(skb->data); | |
3766 | skb_pull(skb, 2); | |
3767 | ||
052897ca GP |
3768 | if (pi->sdu_len > pi->imtu) { |
3769 | err = -EMSGSIZE; | |
3770 | break; | |
3771 | } | |
3772 | ||
c74e560c GP |
3773 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); |
3774 | if (!pi->sdu) { | |
3775 | err = -ENOMEM; | |
3776 | break; | |
3777 | } | |
3778 | ||
3779 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3780 | ||
3781 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3782 | pi->partial_sdu_len = skb->len; | |
3783 | err = 0; | |
3784 | break; | |
3785 | ||
3786 | case L2CAP_SDU_CONTINUE: | |
3787 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3788 | break; | |
3789 | ||
3790 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3791 | ||
3792 | pi->partial_sdu_len += skb->len; | |
3793 | if (pi->partial_sdu_len > pi->sdu_len) | |
3794 | kfree_skb(pi->sdu); | |
3795 | else | |
3796 | err = 0; | |
3797 | ||
3798 | break; | |
3799 | ||
3800 | case L2CAP_SDU_END: | |
3801 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3802 | break; | |
3803 | ||
3804 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3805 | ||
3806 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
3807 | pi->partial_sdu_len += skb->len; | |
3808 | ||
36f2fd58 GP |
3809 | if (pi->partial_sdu_len > pi->imtu) |
3810 | goto drop; | |
3811 | ||
c74e560c GP |
3812 | if (pi->partial_sdu_len == pi->sdu_len) { |
3813 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
3814 | err = sock_queue_rcv_skb(sk, _skb); | |
3815 | if (err < 0) | |
3816 | kfree_skb(_skb); | |
3817 | } | |
c74e560c GP |
3818 | err = 0; |
3819 | ||
36f2fd58 GP |
3820 | drop: |
3821 | kfree_skb(pi->sdu); | |
c74e560c GP |
3822 | break; |
3823 | } | |
3824 | ||
3825 | kfree_skb(skb); | |
3826 | return err; | |
3827 | } | |
3828 | ||
8f17154f GP |
3829 | static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq) |
3830 | { | |
3831 | struct sk_buff *skb; | |
afefdbc4 | 3832 | u16 control; |
8f17154f | 3833 | |
59203a21 | 3834 | while ((skb = skb_peek(SREJ_QUEUE(sk)))) { |
8f17154f GP |
3835 | if (bt_cb(skb)->tx_seq != tx_seq) |
3836 | break; | |
3837 | ||
3838 | skb = skb_dequeue(SREJ_QUEUE(sk)); | |
afefdbc4 | 3839 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
18778a63 | 3840 | l2cap_ertm_reassembly_sdu(sk, skb, control); |
8f17154f GP |
3841 | l2cap_pi(sk)->buffer_seq_srej = |
3842 | (l2cap_pi(sk)->buffer_seq_srej + 1) % 64; | |
8ff50ec0 | 3843 | tx_seq = (tx_seq + 1) % 64; |
8f17154f GP |
3844 | } |
3845 | } | |
3846 | ||
3847 | static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq) | |
3848 | { | |
3849 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3850 | struct srej_list *l, *tmp; | |
3851 | u16 control; | |
3852 | ||
59203a21 | 3853 | list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) { |
8f17154f GP |
3854 | if (l->tx_seq == tx_seq) { |
3855 | list_del(&l->list); | |
3856 | kfree(l); | |
3857 | return; | |
3858 | } | |
3859 | control = L2CAP_SUPER_SELECT_REJECT; | |
3860 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3861 | l2cap_send_sframe(pi, control); | |
3862 | list_del(&l->list); | |
3863 | list_add_tail(&l->list, SREJ_LIST(sk)); | |
3864 | } | |
3865 | } | |
3866 | ||
3867 | static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) | |
3868 | { | |
3869 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3870 | struct srej_list *new; | |
3871 | u16 control; | |
3872 | ||
3873 | while (tx_seq != pi->expected_tx_seq) { | |
3874 | control = L2CAP_SUPER_SELECT_REJECT; | |
3875 | control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3876 | l2cap_send_sframe(pi, control); | |
3877 | ||
3878 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); | |
8ff50ec0 GP |
3879 | new->tx_seq = pi->expected_tx_seq; |
3880 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
8f17154f GP |
3881 | list_add_tail(&new->list, SREJ_LIST(sk)); |
3882 | } | |
8ff50ec0 | 3883 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; |
8f17154f GP |
3884 | } |
3885 | ||
1c2acffb GP |
3886 | static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
3887 | { | |
3888 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3889 | u8 tx_seq = __get_txseq(rx_control); | |
9f121a5a | 3890 | u8 req_seq = __get_reqseq(rx_control); |
8f17154f | 3891 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
f6337c77 | 3892 | int tx_seq_offset, expected_tx_seq_offset; |
803020c6 | 3893 | int num_to_ack = (pi->tx_win/6) + 1; |
1c2acffb GP |
3894 | int err = 0; |
3895 | ||
0e98958d GP |
3896 | BT_DBG("sk %p len %d tx_seq %d rx_control 0x%4.4x", sk, skb->len, tx_seq, |
3897 | rx_control); | |
1c2acffb | 3898 | |
9b16dc65 GP |
3899 | if (L2CAP_CTRL_FINAL & rx_control && |
3900 | l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) { | |
1d8f5d16 GP |
3901 | del_timer(&pi->monitor_timer); |
3902 | if (pi->unacked_frames > 0) | |
3903 | __mod_retrans_timer(); | |
3904 | pi->conn_state &= ~L2CAP_CONN_WAIT_F; | |
3905 | } | |
3906 | ||
9f121a5a GP |
3907 | pi->expected_ack_seq = req_seq; |
3908 | l2cap_drop_acked_frames(sk); | |
3909 | ||
8f17154f GP |
3910 | if (tx_seq == pi->expected_tx_seq) |
3911 | goto expected; | |
1c2acffb | 3912 | |
9b53350d JPRV |
3913 | tx_seq_offset = (tx_seq - pi->buffer_seq) % 64; |
3914 | if (tx_seq_offset < 0) | |
3915 | tx_seq_offset += 64; | |
3916 | ||
3917 | /* invalid tx_seq */ | |
3918 | if (tx_seq_offset >= pi->tx_win) { | |
9b108fc0 | 3919 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); |
9b53350d JPRV |
3920 | goto drop; |
3921 | } | |
3922 | ||
1890d36b GP |
3923 | if (pi->conn_state == L2CAP_CONN_LOCAL_BUSY) |
3924 | goto drop; | |
3925 | ||
8f17154f GP |
3926 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
3927 | struct srej_list *first; | |
30afb5b2 | 3928 | |
8f17154f GP |
3929 | first = list_first_entry(SREJ_LIST(sk), |
3930 | struct srej_list, list); | |
3931 | if (tx_seq == first->tx_seq) { | |
3932 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3933 | l2cap_check_srej_gap(sk, tx_seq); | |
3934 | ||
3935 | list_del(&first->list); | |
3936 | kfree(first); | |
3937 | ||
3938 | if (list_empty(SREJ_LIST(sk))) { | |
3939 | pi->buffer_seq = pi->buffer_seq_srej; | |
3940 | pi->conn_state &= ~L2CAP_CONN_SREJ_SENT; | |
855666cc | 3941 | l2cap_send_ack(pi); |
0e98958d | 3942 | BT_DBG("sk %p, Exit SREJ_SENT", sk); |
8f17154f GP |
3943 | } |
3944 | } else { | |
3945 | struct srej_list *l; | |
9b53350d JPRV |
3946 | |
3947 | /* duplicated tx_seq */ | |
3948 | if (l2cap_add_to_srej_queue(sk, skb, tx_seq, sar) < 0) | |
3949 | goto drop; | |
8f17154f GP |
3950 | |
3951 | list_for_each_entry(l, SREJ_LIST(sk), list) { | |
3952 | if (l->tx_seq == tx_seq) { | |
3953 | l2cap_resend_srejframe(sk, tx_seq); | |
3954 | return 0; | |
3955 | } | |
3956 | } | |
3957 | l2cap_send_srejframe(sk, tx_seq); | |
30afb5b2 GP |
3958 | } |
3959 | } else { | |
9b53350d JPRV |
3960 | expected_tx_seq_offset = |
3961 | (pi->expected_tx_seq - pi->buffer_seq) % 64; | |
3962 | if (expected_tx_seq_offset < 0) | |
3963 | expected_tx_seq_offset += 64; | |
3964 | ||
3965 | /* duplicated tx_seq */ | |
3966 | if (tx_seq_offset < expected_tx_seq_offset) | |
3967 | goto drop; | |
3968 | ||
8f17154f | 3969 | pi->conn_state |= L2CAP_CONN_SREJ_SENT; |
1c2acffb | 3970 | |
0e98958d GP |
3971 | BT_DBG("sk %p, Enter SREJ", sk); |
3972 | ||
8f17154f GP |
3973 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
3974 | pi->buffer_seq_srej = pi->buffer_seq; | |
3975 | ||
3976 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b | 3977 | __skb_queue_head_init(BUSY_QUEUE(sk)); |
8f17154f GP |
3978 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
3979 | ||
ef54fd93 GP |
3980 | pi->conn_state |= L2CAP_CONN_SEND_PBIT; |
3981 | ||
8f17154f | 3982 | l2cap_send_srejframe(sk, tx_seq); |
7fe9b298 GP |
3983 | |
3984 | del_timer(&pi->ack_timer); | |
1c2acffb | 3985 | } |
30afb5b2 GP |
3986 | return 0; |
3987 | ||
8f17154f GP |
3988 | expected: |
3989 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
3990 | ||
3991 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { | |
3b1a9f3f GP |
3992 | bt_cb(skb)->tx_seq = tx_seq; |
3993 | bt_cb(skb)->sar = sar; | |
3994 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
8f17154f GP |
3995 | return 0; |
3996 | } | |
3997 | ||
2ece3684 GP |
3998 | err = l2cap_push_rx_skb(sk, skb, rx_control); |
3999 | if (err < 0) | |
4000 | return 0; | |
4001 | ||
4ec10d97 GP |
4002 | if (rx_control & L2CAP_CTRL_FINAL) { |
4003 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
4004 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4005 | else |
4006 | l2cap_retransmit_frames(sk); | |
4ec10d97 GP |
4007 | } |
4008 | ||
c1b4f43b GP |
4009 | __mod_ack_timer(); |
4010 | ||
803020c6 GP |
4011 | pi->num_acked = (pi->num_acked + 1) % num_to_ack; |
4012 | if (pi->num_acked == num_to_ack - 1) | |
9e917af1 GP |
4013 | l2cap_send_ack(pi); |
4014 | ||
8f17154f | 4015 | return 0; |
9b53350d JPRV |
4016 | |
4017 | drop: | |
4018 | kfree_skb(skb); | |
4019 | return 0; | |
1c2acffb GP |
4020 | } |
4021 | ||
e072745f | 4022 | static inline void l2cap_data_channel_rrframe(struct sock *sk, u16 rx_control) |
1c2acffb GP |
4023 | { |
4024 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
6e3a5981 | 4025 | |
0e98958d GP |
4026 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, __get_reqseq(rx_control), |
4027 | rx_control); | |
4028 | ||
6e3a5981 GP |
4029 | pi->expected_ack_seq = __get_reqseq(rx_control); |
4030 | l2cap_drop_acked_frames(sk); | |
1c2acffb | 4031 | |
e072745f | 4032 | if (rx_control & L2CAP_CTRL_POLL) { |
3cb123d1 | 4033 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; |
05fbd89d GP |
4034 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
4035 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && | |
4036 | (pi->unacked_frames > 0)) | |
4037 | __mod_retrans_timer(); | |
4038 | ||
4039 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; | |
4040 | l2cap_send_srejtail(sk); | |
4041 | } else { | |
4042 | l2cap_send_i_or_rr_or_rnr(sk); | |
05fbd89d | 4043 | } |
1d8f5d16 | 4044 | |
e072745f GP |
4045 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
4046 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; | |
4ec10d97 | 4047 | |
e072745f GP |
4048 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
4049 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4050 | else |
4051 | l2cap_retransmit_frames(sk); | |
2246b2f1 | 4052 | |
e072745f | 4053 | } else { |
e072745f GP |
4054 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
4055 | (pi->unacked_frames > 0)) | |
4056 | __mod_retrans_timer(); | |
1c2acffb | 4057 | |
2246b2f1 | 4058 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
dfc909be | 4059 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
e072745f | 4060 | l2cap_send_ack(pi); |
dfc909be | 4061 | } else { |
e072745f | 4062 | l2cap_ertm_send(sk); |
dfc909be | 4063 | } |
e072745f GP |
4064 | } |
4065 | } | |
2246b2f1 | 4066 | |
e072745f GP |
4067 | static inline void l2cap_data_channel_rejframe(struct sock *sk, u16 rx_control) |
4068 | { | |
4069 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4070 | u8 tx_seq = __get_reqseq(rx_control); | |
30afb5b2 | 4071 | |
0e98958d GP |
4072 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4073 | ||
e072745f GP |
4074 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
4075 | ||
8abb52ee | 4076 | pi->expected_ack_seq = tx_seq; |
e072745f GP |
4077 | l2cap_drop_acked_frames(sk); |
4078 | ||
4079 | if (rx_control & L2CAP_CTRL_FINAL) { | |
4080 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
4081 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4082 | else |
4083 | l2cap_retransmit_frames(sk); | |
e072745f | 4084 | } else { |
dfc909be | 4085 | l2cap_retransmit_frames(sk); |
30afb5b2 | 4086 | |
0301ef04 | 4087 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
e072745f | 4088 | pi->conn_state |= L2CAP_CONN_REJ_ACT; |
e072745f GP |
4089 | } |
4090 | } | |
4091 | static inline void l2cap_data_channel_srejframe(struct sock *sk, u16 rx_control) | |
4092 | { | |
4093 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4094 | u8 tx_seq = __get_reqseq(rx_control); | |
30afb5b2 | 4095 | |
0e98958d GP |
4096 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4097 | ||
e072745f | 4098 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
2246b2f1 | 4099 | |
e072745f GP |
4100 | if (rx_control & L2CAP_CTRL_POLL) { |
4101 | pi->expected_ack_seq = tx_seq; | |
4102 | l2cap_drop_acked_frames(sk); | |
3cb123d1 GP |
4103 | |
4104 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; | |
dfc909be GP |
4105 | l2cap_retransmit_one_frame(sk, tx_seq); |
4106 | ||
e072745f | 4107 | l2cap_ertm_send(sk); |
dfc909be | 4108 | |
e072745f GP |
4109 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
4110 | pi->srej_save_reqseq = tx_seq; | |
4111 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
ef54fd93 | 4112 | } |
e072745f GP |
4113 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
4114 | if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && | |
4115 | pi->srej_save_reqseq == tx_seq) | |
4116 | pi->conn_state &= ~L2CAP_CONN_SREJ_ACT; | |
4117 | else | |
dfc909be | 4118 | l2cap_retransmit_one_frame(sk, tx_seq); |
e072745f | 4119 | } else { |
dfc909be | 4120 | l2cap_retransmit_one_frame(sk, tx_seq); |
e072745f GP |
4121 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
4122 | pi->srej_save_reqseq = tx_seq; | |
4123 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
ef54fd93 | 4124 | } |
e072745f GP |
4125 | } |
4126 | } | |
4127 | ||
4128 | static inline void l2cap_data_channel_rnrframe(struct sock *sk, u16 rx_control) | |
4129 | { | |
4130 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4131 | u8 tx_seq = __get_reqseq(rx_control); | |
4132 | ||
0e98958d GP |
4133 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4134 | ||
e072745f GP |
4135 | pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; |
4136 | pi->expected_ack_seq = tx_seq; | |
4137 | l2cap_drop_acked_frames(sk); | |
4138 | ||
3cb123d1 GP |
4139 | if (rx_control & L2CAP_CTRL_POLL) |
4140 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; | |
4141 | ||
99b0d4b7 GP |
4142 | if (!(pi->conn_state & L2CAP_CONN_SREJ_SENT)) { |
4143 | del_timer(&pi->retrans_timer); | |
a2e12a2a GP |
4144 | if (rx_control & L2CAP_CTRL_POLL) |
4145 | l2cap_send_rr_or_rnr(pi, L2CAP_CTRL_FINAL); | |
99b0d4b7 | 4146 | return; |
e072745f | 4147 | } |
99b0d4b7 GP |
4148 | |
4149 | if (rx_control & L2CAP_CTRL_POLL) | |
4150 | l2cap_send_srejtail(sk); | |
4151 | else | |
4152 | l2cap_send_sframe(pi, L2CAP_SUPER_RCV_READY); | |
e072745f GP |
4153 | } |
4154 | ||
4155 | static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) | |
4156 | { | |
4157 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
4158 | ||
9b16dc65 GP |
4159 | if (L2CAP_CTRL_FINAL & rx_control && |
4160 | l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) { | |
e072745f GP |
4161 | del_timer(&l2cap_pi(sk)->monitor_timer); |
4162 | if (l2cap_pi(sk)->unacked_frames > 0) | |
4163 | __mod_retrans_timer(); | |
4164 | l2cap_pi(sk)->conn_state &= ~L2CAP_CONN_WAIT_F; | |
4165 | } | |
4166 | ||
4167 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { | |
4168 | case L2CAP_SUPER_RCV_READY: | |
4169 | l2cap_data_channel_rrframe(sk, rx_control); | |
8f17154f GP |
4170 | break; |
4171 | ||
e072745f GP |
4172 | case L2CAP_SUPER_REJECT: |
4173 | l2cap_data_channel_rejframe(sk, rx_control); | |
4174 | break; | |
2246b2f1 | 4175 | |
e072745f GP |
4176 | case L2CAP_SUPER_SELECT_REJECT: |
4177 | l2cap_data_channel_srejframe(sk, rx_control); | |
4178 | break; | |
4179 | ||
4180 | case L2CAP_SUPER_RCV_NOT_READY: | |
4181 | l2cap_data_channel_rnrframe(sk, rx_control); | |
1c2acffb GP |
4182 | break; |
4183 | } | |
4184 | ||
faaebd19 | 4185 | kfree_skb(skb); |
1c2acffb GP |
4186 | return 0; |
4187 | } | |
4188 | ||
218bb9df GP |
4189 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb) |
4190 | { | |
4191 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4192 | u16 control; | |
4193 | u8 req_seq; | |
4194 | int len, next_tx_seq_offset, req_seq_offset; | |
4195 | ||
4196 | control = get_unaligned_le16(skb->data); | |
4197 | skb_pull(skb, 2); | |
4198 | len = skb->len; | |
4199 | ||
4200 | /* | |
4201 | * We can just drop the corrupted I-frame here. | |
4202 | * Receiver will miss it and start proper recovery | |
4203 | * procedures and ask retransmission. | |
4204 | */ | |
4205 | if (l2cap_check_fcs(pi, skb)) | |
4206 | goto drop; | |
4207 | ||
4208 | if (__is_sar_start(control) && __is_iframe(control)) | |
4209 | len -= 2; | |
4210 | ||
4211 | if (pi->fcs == L2CAP_FCS_CRC16) | |
4212 | len -= 2; | |
4213 | ||
4214 | if (len > pi->mps) { | |
4215 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4216 | goto drop; | |
4217 | } | |
4218 | ||
4219 | req_seq = __get_reqseq(control); | |
4220 | req_seq_offset = (req_seq - pi->expected_ack_seq) % 64; | |
4221 | if (req_seq_offset < 0) | |
4222 | req_seq_offset += 64; | |
4223 | ||
4224 | next_tx_seq_offset = | |
4225 | (pi->next_tx_seq - pi->expected_ack_seq) % 64; | |
4226 | if (next_tx_seq_offset < 0) | |
4227 | next_tx_seq_offset += 64; | |
4228 | ||
4229 | /* check for invalid req-seq */ | |
4230 | if (req_seq_offset > next_tx_seq_offset) { | |
4231 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4232 | goto drop; | |
4233 | } | |
4234 | ||
4235 | if (__is_iframe(control)) { | |
4236 | if (len < 0) { | |
4237 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4238 | goto drop; | |
4239 | } | |
4240 | ||
4241 | l2cap_data_channel_iframe(sk, control, skb); | |
4242 | } else { | |
4243 | if (len != 0) { | |
4244 | BT_ERR("%d", len); | |
4245 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4246 | goto drop; | |
4247 | } | |
4248 | ||
4249 | l2cap_data_channel_sframe(sk, control, skb); | |
4250 | } | |
4251 | ||
4252 | return 0; | |
4253 | ||
4254 | drop: | |
4255 | kfree_skb(skb); | |
4256 | return 0; | |
4257 | } | |
4258 | ||
1da177e4 LT |
4259 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
4260 | { | |
4261 | struct sock *sk; | |
6840ed07 | 4262 | struct l2cap_pinfo *pi; |
51893f88 | 4263 | u16 control; |
218bb9df GP |
4264 | u8 tx_seq; |
4265 | int len; | |
1da177e4 LT |
4266 | |
4267 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
4268 | if (!sk) { | |
4269 | BT_DBG("unknown cid 0x%4.4x", cid); | |
4270 | goto drop; | |
4271 | } | |
4272 | ||
6840ed07 GP |
4273 | pi = l2cap_pi(sk); |
4274 | ||
1da177e4 LT |
4275 | BT_DBG("sk %p, len %d", sk, skb->len); |
4276 | ||
4277 | if (sk->sk_state != BT_CONNECTED) | |
4278 | goto drop; | |
4279 | ||
6840ed07 | 4280 | switch (pi->mode) { |
1c2acffb GP |
4281 | case L2CAP_MODE_BASIC: |
4282 | /* If socket recv buffers overflows we drop data here | |
4283 | * which is *bad* because L2CAP has to be reliable. | |
4284 | * But we don't have any other choice. L2CAP doesn't | |
4285 | * provide flow control mechanism. */ | |
1da177e4 | 4286 | |
6840ed07 | 4287 | if (pi->imtu < skb->len) |
1c2acffb | 4288 | goto drop; |
1da177e4 | 4289 | |
1c2acffb GP |
4290 | if (!sock_queue_rcv_skb(sk, skb)) |
4291 | goto done; | |
4292 | break; | |
4293 | ||
4294 | case L2CAP_MODE_ERTM: | |
218bb9df GP |
4295 | if (!sock_owned_by_user(sk)) { |
4296 | l2cap_ertm_data_rcv(sk, skb); | |
277ffbe3 | 4297 | } else { |
218bb9df | 4298 | if (sk_add_backlog(sk, skb)) |
277ffbe3 | 4299 | goto drop; |
277ffbe3 | 4300 | } |
1c2acffb | 4301 | |
fcafde2e | 4302 | goto done; |
1c2acffb | 4303 | |
6840ed07 GP |
4304 | case L2CAP_MODE_STREAMING: |
4305 | control = get_unaligned_le16(skb->data); | |
4306 | skb_pull(skb, 2); | |
4307 | len = skb->len; | |
4308 | ||
26000089 GP |
4309 | if (l2cap_check_fcs(pi, skb)) |
4310 | goto drop; | |
4311 | ||
6840ed07 GP |
4312 | if (__is_sar_start(control)) |
4313 | len -= 2; | |
4314 | ||
fcc203c3 GP |
4315 | if (pi->fcs == L2CAP_FCS_CRC16) |
4316 | len -= 2; | |
4317 | ||
51893f88 | 4318 | if (len > pi->mps || len < 0 || __is_sframe(control)) |
6840ed07 GP |
4319 | goto drop; |
4320 | ||
4321 | tx_seq = __get_txseq(control); | |
4322 | ||
4323 | if (pi->expected_tx_seq == tx_seq) | |
4324 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
4325 | else | |
7dffe421 | 4326 | pi->expected_tx_seq = (tx_seq + 1) % 64; |
6840ed07 | 4327 | |
18778a63 | 4328 | l2cap_streaming_reassembly_sdu(sk, skb, control); |
6840ed07 GP |
4329 | |
4330 | goto done; | |
4331 | ||
1c2acffb | 4332 | default: |
e8235c6b | 4333 | BT_DBG("sk %p: bad mode 0x%2.2x", sk, pi->mode); |
1c2acffb GP |
4334 | break; |
4335 | } | |
1da177e4 LT |
4336 | |
4337 | drop: | |
4338 | kfree_skb(skb); | |
4339 | ||
4340 | done: | |
0139418c MH |
4341 | if (sk) |
4342 | bh_unlock_sock(sk); | |
4343 | ||
1da177e4 LT |
4344 | return 0; |
4345 | } | |
4346 | ||
8e036fc3 | 4347 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
4348 | { |
4349 | struct sock *sk; | |
4350 | ||
4351 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
4352 | if (!sk) | |
4353 | goto drop; | |
4354 | ||
4355 | BT_DBG("sk %p, len %d", sk, skb->len); | |
4356 | ||
4357 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
4358 | goto drop; | |
4359 | ||
4360 | if (l2cap_pi(sk)->imtu < skb->len) | |
4361 | goto drop; | |
4362 | ||
4363 | if (!sock_queue_rcv_skb(sk, skb)) | |
4364 | goto done; | |
4365 | ||
4366 | drop: | |
4367 | kfree_skb(skb); | |
4368 | ||
4369 | done: | |
af05b30b GP |
4370 | if (sk) |
4371 | bh_unlock_sock(sk); | |
1da177e4 LT |
4372 | return 0; |
4373 | } | |
4374 | ||
4375 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
4376 | { | |
4377 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
4378 | u16 cid, len; |
4379 | __le16 psm; | |
1da177e4 LT |
4380 | |
4381 | skb_pull(skb, L2CAP_HDR_SIZE); | |
4382 | cid = __le16_to_cpu(lh->cid); | |
4383 | len = __le16_to_cpu(lh->len); | |
4384 | ||
1c2acffb GP |
4385 | if (len != skb->len) { |
4386 | kfree_skb(skb); | |
4387 | return; | |
4388 | } | |
4389 | ||
1da177e4 LT |
4390 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
4391 | ||
4392 | switch (cid) { | |
8db4dc46 | 4393 | case L2CAP_CID_SIGNALING: |
1da177e4 LT |
4394 | l2cap_sig_channel(conn, skb); |
4395 | break; | |
4396 | ||
8db4dc46 | 4397 | case L2CAP_CID_CONN_LESS: |
1b7bf4ed | 4398 | psm = get_unaligned_le16(skb->data); |
1da177e4 LT |
4399 | skb_pull(skb, 2); |
4400 | l2cap_conless_channel(conn, psm, skb); | |
4401 | break; | |
4402 | ||
4403 | default: | |
4404 | l2cap_data_channel(conn, cid, skb); | |
4405 | break; | |
4406 | } | |
4407 | } | |
4408 | ||
4409 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
4410 | ||
4411 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
4412 | { | |
4413 | int exact = 0, lm1 = 0, lm2 = 0; | |
4414 | register struct sock *sk; | |
4415 | struct hlist_node *node; | |
4416 | ||
4417 | if (type != ACL_LINK) | |
4418 | return 0; | |
4419 | ||
4420 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
4421 | ||
4422 | /* Find listening sockets and check their link_mode */ | |
4423 | read_lock(&l2cap_sk_list.lock); | |
4424 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
4425 | if (sk->sk_state != BT_LISTEN) | |
4426 | continue; | |
4427 | ||
4428 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
4429 | lm1 |= HCI_LM_ACCEPT; |
4430 | if (l2cap_pi(sk)->role_switch) | |
4431 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 4432 | exact++; |
2af6b9d5 MH |
4433 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
4434 | lm2 |= HCI_LM_ACCEPT; | |
4435 | if (l2cap_pi(sk)->role_switch) | |
4436 | lm2 |= HCI_LM_MASTER; | |
4437 | } | |
1da177e4 LT |
4438 | } |
4439 | read_unlock(&l2cap_sk_list.lock); | |
4440 | ||
4441 | return exact ? lm1 : lm2; | |
4442 | } | |
4443 | ||
4444 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
4445 | { | |
0139418c MH |
4446 | struct l2cap_conn *conn; |
4447 | ||
1da177e4 LT |
4448 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
4449 | ||
4450 | if (hcon->type != ACL_LINK) | |
4451 | return 0; | |
4452 | ||
4453 | if (!status) { | |
1da177e4 LT |
4454 | conn = l2cap_conn_add(hcon, status); |
4455 | if (conn) | |
4456 | l2cap_conn_ready(conn); | |
0139418c | 4457 | } else |
1da177e4 LT |
4458 | l2cap_conn_del(hcon, bt_err(status)); |
4459 | ||
4460 | return 0; | |
4461 | } | |
4462 | ||
2950f21a MH |
4463 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
4464 | { | |
4465 | struct l2cap_conn *conn = hcon->l2cap_data; | |
4466 | ||
4467 | BT_DBG("hcon %p", hcon); | |
4468 | ||
4469 | if (hcon->type != ACL_LINK || !conn) | |
4470 | return 0x13; | |
4471 | ||
4472 | return conn->disc_reason; | |
4473 | } | |
4474 | ||
4475 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) | |
1da177e4 LT |
4476 | { |
4477 | BT_DBG("hcon %p reason %d", hcon, reason); | |
4478 | ||
4479 | if (hcon->type != ACL_LINK) | |
4480 | return 0; | |
4481 | ||
4482 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 4483 | |
1da177e4 LT |
4484 | return 0; |
4485 | } | |
4486 | ||
f62e4323 MH |
4487 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
4488 | { | |
bd3c9e25 | 4489 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) |
255c7601 MH |
4490 | return; |
4491 | ||
f62e4323 MH |
4492 | if (encrypt == 0x00) { |
4493 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { | |
4494 | l2cap_sock_clear_timer(sk); | |
4495 | l2cap_sock_set_timer(sk, HZ * 5); | |
4496 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
4497 | __l2cap_sock_close(sk, ECONNREFUSED); | |
4498 | } else { | |
4499 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) | |
4500 | l2cap_sock_clear_timer(sk); | |
4501 | } | |
4502 | } | |
4503 | ||
8c1b2355 | 4504 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
4505 | { |
4506 | struct l2cap_chan_list *l; | |
0139418c | 4507 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 4508 | struct sock *sk; |
1da177e4 | 4509 | |
0139418c | 4510 | if (!conn) |
1da177e4 | 4511 | return 0; |
0139418c | 4512 | |
1da177e4 LT |
4513 | l = &conn->chan_list; |
4514 | ||
4515 | BT_DBG("conn %p", conn); | |
4516 | ||
4517 | read_lock(&l->lock); | |
4518 | ||
4519 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
4520 | bh_lock_sock(sk); | |
4521 | ||
6a8d3010 MH |
4522 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
4523 | bh_unlock_sock(sk); | |
4524 | continue; | |
4525 | } | |
4526 | ||
f62e4323 | 4527 | if (!status && (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 4528 | sk->sk_state == BT_CONFIG)) { |
f62e4323 | 4529 | l2cap_check_encryption(sk, encrypt); |
9719f8af MH |
4530 | bh_unlock_sock(sk); |
4531 | continue; | |
4532 | } | |
4533 | ||
b1235d79 MH |
4534 | if (sk->sk_state == BT_CONNECT) { |
4535 | if (!status) { | |
4536 | struct l2cap_conn_req req; | |
4537 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
4538 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 4539 | |
b1235d79 | 4540 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
e501d055 | 4541 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 | 4542 | |
b1235d79 MH |
4543 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4544 | L2CAP_CONN_REQ, sizeof(req), &req); | |
4545 | } else { | |
4546 | l2cap_sock_clear_timer(sk); | |
4547 | l2cap_sock_set_timer(sk, HZ / 10); | |
4548 | } | |
4549 | } else if (sk->sk_state == BT_CONNECT2) { | |
4550 | struct l2cap_conn_rsp rsp; | |
4551 | __u16 result; | |
1da177e4 | 4552 | |
b1235d79 MH |
4553 | if (!status) { |
4554 | sk->sk_state = BT_CONFIG; | |
4555 | result = L2CAP_CR_SUCCESS; | |
4556 | } else { | |
4557 | sk->sk_state = BT_DISCONN; | |
4558 | l2cap_sock_set_timer(sk, HZ / 10); | |
4559 | result = L2CAP_CR_SEC_BLOCK; | |
4560 | } | |
4561 | ||
4562 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
4563 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
4564 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 4565 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
4566 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4567 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4568 | } | |
1da177e4 LT |
4569 | |
4570 | bh_unlock_sock(sk); | |
4571 | } | |
4572 | ||
4573 | read_unlock(&l->lock); | |
b1235d79 | 4574 | |
1da177e4 LT |
4575 | return 0; |
4576 | } | |
4577 | ||
4578 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
4579 | { | |
4580 | struct l2cap_conn *conn = hcon->l2cap_data; | |
4581 | ||
4582 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
4583 | goto drop; | |
4584 | ||
4585 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
4586 | ||
4587 | if (flags & ACL_START) { | |
4588 | struct l2cap_hdr *hdr; | |
4589 | int len; | |
4590 | ||
4591 | if (conn->rx_len) { | |
4592 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
4593 | kfree_skb(conn->rx_skb); | |
4594 | conn->rx_skb = NULL; | |
4595 | conn->rx_len = 0; | |
4596 | l2cap_conn_unreliable(conn, ECOMM); | |
4597 | } | |
4598 | ||
4599 | if (skb->len < 2) { | |
4600 | BT_ERR("Frame is too short (len %d)", skb->len); | |
4601 | l2cap_conn_unreliable(conn, ECOMM); | |
4602 | goto drop; | |
4603 | } | |
4604 | ||
4605 | hdr = (struct l2cap_hdr *) skb->data; | |
4606 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
4607 | ||
4608 | if (len == skb->len) { | |
4609 | /* Complete frame received */ | |
4610 | l2cap_recv_frame(conn, skb); | |
4611 | return 0; | |
4612 | } | |
4613 | ||
4614 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
4615 | ||
4616 | if (skb->len > len) { | |
4617 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
4618 | skb->len, len); | |
4619 | l2cap_conn_unreliable(conn, ECOMM); | |
4620 | goto drop; | |
4621 | } | |
4622 | ||
4623 | /* Allocate skb for the complete frame (with header) */ | |
af05b30b GP |
4624 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
4625 | if (!conn->rx_skb) | |
1da177e4 LT |
4626 | goto drop; |
4627 | ||
d626f62b | 4628 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 4629 | skb->len); |
1da177e4 LT |
4630 | conn->rx_len = len - skb->len; |
4631 | } else { | |
4632 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
4633 | ||
4634 | if (!conn->rx_len) { | |
4635 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
4636 | l2cap_conn_unreliable(conn, ECOMM); | |
4637 | goto drop; | |
4638 | } | |
4639 | ||
4640 | if (skb->len > conn->rx_len) { | |
4641 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
4642 | skb->len, conn->rx_len); | |
4643 | kfree_skb(conn->rx_skb); | |
4644 | conn->rx_skb = NULL; | |
4645 | conn->rx_len = 0; | |
4646 | l2cap_conn_unreliable(conn, ECOMM); | |
4647 | goto drop; | |
4648 | } | |
4649 | ||
d626f62b | 4650 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 4651 | skb->len); |
1da177e4 LT |
4652 | conn->rx_len -= skb->len; |
4653 | ||
4654 | if (!conn->rx_len) { | |
4655 | /* Complete frame received */ | |
4656 | l2cap_recv_frame(conn, conn->rx_skb); | |
4657 | conn->rx_skb = NULL; | |
4658 | } | |
4659 | } | |
4660 | ||
4661 | drop: | |
4662 | kfree_skb(skb); | |
4663 | return 0; | |
4664 | } | |
4665 | ||
aef7d97c | 4666 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
4667 | { |
4668 | struct sock *sk; | |
4669 | struct hlist_node *node; | |
1da177e4 LT |
4670 | |
4671 | read_lock_bh(&l2cap_sk_list.lock); | |
4672 | ||
be9d1227 MH |
4673 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
4674 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
101545f6 | 4675 | |
aef7d97c MH |
4676 | seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
4677 | batostr(&bt_sk(sk)->src), | |
4678 | batostr(&bt_sk(sk)->dst), | |
4679 | sk->sk_state, __le16_to_cpu(pi->psm), | |
4680 | pi->scid, pi->dcid, | |
4681 | pi->imtu, pi->omtu, pi->sec_level); | |
be9d1227 | 4682 | } |
1da177e4 | 4683 | |
1da177e4 | 4684 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 4685 | |
aef7d97c | 4686 | return 0; |
1da177e4 LT |
4687 | } |
4688 | ||
aef7d97c MH |
4689 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
4690 | { | |
4691 | return single_open(file, l2cap_debugfs_show, inode->i_private); | |
4692 | } | |
4693 | ||
4694 | static const struct file_operations l2cap_debugfs_fops = { | |
4695 | .open = l2cap_debugfs_open, | |
4696 | .read = seq_read, | |
4697 | .llseek = seq_lseek, | |
4698 | .release = single_release, | |
4699 | }; | |
4700 | ||
4701 | static struct dentry *l2cap_debugfs; | |
1da177e4 | 4702 | |
90ddc4f0 | 4703 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
4704 | .family = PF_BLUETOOTH, |
4705 | .owner = THIS_MODULE, | |
4706 | .release = l2cap_sock_release, | |
4707 | .bind = l2cap_sock_bind, | |
4708 | .connect = l2cap_sock_connect, | |
4709 | .listen = l2cap_sock_listen, | |
4710 | .accept = l2cap_sock_accept, | |
4711 | .getname = l2cap_sock_getname, | |
4712 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 4713 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 4714 | .poll = bt_sock_poll, |
3241ad82 | 4715 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
4716 | .mmap = sock_no_mmap, |
4717 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
4718 | .shutdown = l2cap_sock_shutdown, |
4719 | .setsockopt = l2cap_sock_setsockopt, | |
4720 | .getsockopt = l2cap_sock_getsockopt | |
4721 | }; | |
4722 | ||
ec1b4cf7 | 4723 | static const struct net_proto_family l2cap_sock_family_ops = { |
1da177e4 LT |
4724 | .family = PF_BLUETOOTH, |
4725 | .owner = THIS_MODULE, | |
4726 | .create = l2cap_sock_create, | |
4727 | }; | |
4728 | ||
4729 | static struct hci_proto l2cap_hci_proto = { | |
4730 | .name = "L2CAP", | |
4731 | .id = HCI_PROTO_L2CAP, | |
4732 | .connect_ind = l2cap_connect_ind, | |
4733 | .connect_cfm = l2cap_connect_cfm, | |
4734 | .disconn_ind = l2cap_disconn_ind, | |
2950f21a | 4735 | .disconn_cfm = l2cap_disconn_cfm, |
8c1b2355 | 4736 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
4737 | .recv_acldata = l2cap_recv_acldata |
4738 | }; | |
4739 | ||
4740 | static int __init l2cap_init(void) | |
4741 | { | |
4742 | int err; | |
be9d1227 | 4743 | |
1da177e4 LT |
4744 | err = proto_register(&l2cap_proto, 0); |
4745 | if (err < 0) | |
4746 | return err; | |
4747 | ||
1890d36b GP |
4748 | _busy_wq = create_singlethread_workqueue("l2cap"); |
4749 | if (!_busy_wq) | |
4750 | goto error; | |
4751 | ||
1da177e4 LT |
4752 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
4753 | if (err < 0) { | |
4754 | BT_ERR("L2CAP socket registration failed"); | |
4755 | goto error; | |
4756 | } | |
4757 | ||
4758 | err = hci_register_proto(&l2cap_hci_proto); | |
4759 | if (err < 0) { | |
4760 | BT_ERR("L2CAP protocol registration failed"); | |
4761 | bt_sock_unregister(BTPROTO_L2CAP); | |
4762 | goto error; | |
4763 | } | |
4764 | ||
aef7d97c MH |
4765 | if (bt_debugfs) { |
4766 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, | |
4767 | bt_debugfs, NULL, &l2cap_debugfs_fops); | |
4768 | if (!l2cap_debugfs) | |
4769 | BT_ERR("Failed to create L2CAP debug file"); | |
4770 | } | |
1da177e4 LT |
4771 | |
4772 | BT_INFO("L2CAP ver %s", VERSION); | |
4773 | BT_INFO("L2CAP socket layer initialized"); | |
4774 | ||
4775 | return 0; | |
4776 | ||
4777 | error: | |
4778 | proto_unregister(&l2cap_proto); | |
4779 | return err; | |
4780 | } | |
4781 | ||
4782 | static void __exit l2cap_exit(void) | |
4783 | { | |
aef7d97c | 4784 | debugfs_remove(l2cap_debugfs); |
1da177e4 | 4785 | |
1890d36b GP |
4786 | flush_workqueue(_busy_wq); |
4787 | destroy_workqueue(_busy_wq); | |
4788 | ||
1da177e4 LT |
4789 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
4790 | BT_ERR("L2CAP socket unregistration failed"); | |
4791 | ||
4792 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
4793 | BT_ERR("L2CAP protocol unregistration failed"); | |
4794 | ||
4795 | proto_unregister(&l2cap_proto); | |
4796 | } | |
4797 | ||
4798 | void l2cap_load(void) | |
4799 | { | |
4800 | /* Dummy function to trigger automatic L2CAP module loading by | |
4801 | * other modules that use L2CAP sockets but don't use any other | |
4802 | * symbols from it. */ | |
1da177e4 LT |
4803 | } |
4804 | EXPORT_SYMBOL(l2cap_load); | |
4805 | ||
4806 | module_init(l2cap_init); | |
4807 | module_exit(l2cap_exit); | |
4808 | ||
44dd46de MH |
4809 | module_param(enable_ertm, bool, 0644); |
4810 | MODULE_PARM_DESC(enable_ertm, "Enable enhanced retransmission mode"); | |
4811 | ||
63fbd24e | 4812 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
4813 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
4814 | MODULE_VERSION(VERSION); | |
4815 | MODULE_LICENSE("GPL"); | |
4816 | MODULE_ALIAS("bt-proto-0"); |