Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
ce5706bd | 4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> |
5d8868ff | 5 | Copyright (C) 2010 Google Inc. |
1da177e4 LT |
6 | |
7 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License version 2 as | |
11 | published by the Free Software Foundation; | |
12 | ||
13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
14 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
16 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
17 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
18 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
19 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
20 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
21 | ||
8e87d142 YH |
22 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
23 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
24 | SOFTWARE IS DISCLAIMED. |
25 | */ | |
26 | ||
27 | /* Bluetooth L2CAP core and sockets. */ | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | ||
31 | #include <linux/types.h> | |
4fc268d2 | 32 | #include <linux/capability.h> |
1da177e4 LT |
33 | #include <linux/errno.h> |
34 | #include <linux/kernel.h> | |
1da177e4 LT |
35 | #include <linux/sched.h> |
36 | #include <linux/slab.h> | |
37 | #include <linux/poll.h> | |
38 | #include <linux/fcntl.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/socket.h> | |
42 | #include <linux/skbuff.h> | |
1da177e4 | 43 | #include <linux/list.h> |
be9d1227 | 44 | #include <linux/device.h> |
aef7d97c MH |
45 | #include <linux/debugfs.h> |
46 | #include <linux/seq_file.h> | |
af05b30b | 47 | #include <linux/uaccess.h> |
fcc203c3 | 48 | #include <linux/crc16.h> |
1da177e4 LT |
49 | #include <net/sock.h> |
50 | ||
51 | #include <asm/system.h> | |
1da177e4 LT |
52 | #include <asm/unaligned.h> |
53 | ||
54 | #include <net/bluetooth/bluetooth.h> | |
55 | #include <net/bluetooth/hci_core.h> | |
56 | #include <net/bluetooth/l2cap.h> | |
57 | ||
dd135240 | 58 | #define VERSION "2.15" |
44dd46de | 59 | |
d1c4a17d | 60 | static int disable_ertm = 0; |
f0709e03 | 61 | |
47ec1dcd | 62 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
e1027a7c | 63 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
1da177e4 | 64 | |
90ddc4f0 | 65 | static const struct proto_ops l2cap_sock_ops; |
1da177e4 | 66 | |
1890d36b GP |
67 | static struct workqueue_struct *_busy_wq; |
68 | ||
1da177e4 | 69 | static struct bt_sock_list l2cap_sk_list = { |
d5fb2962 | 70 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
1da177e4 LT |
71 | }; |
72 | ||
1890d36b GP |
73 | static void l2cap_busy_work(struct work_struct *work); |
74 | ||
1da177e4 LT |
75 | static void __l2cap_sock_close(struct sock *sk, int reason); |
76 | static void l2cap_sock_close(struct sock *sk); | |
77 | static void l2cap_sock_kill(struct sock *sk); | |
78 | ||
e9aeb2dd | 79 | static int l2cap_build_conf_req(struct sock *sk, void *data); |
1da177e4 LT |
80 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
81 | u8 code, u8 ident, u16 dlen, void *data); | |
82 | ||
218bb9df GP |
83 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb); |
84 | ||
1da177e4 LT |
85 | /* ---- L2CAP timers ---- */ |
86 | static void l2cap_sock_timeout(unsigned long arg) | |
87 | { | |
88 | struct sock *sk = (struct sock *) arg; | |
b1235d79 | 89 | int reason; |
1da177e4 LT |
90 | |
91 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
92 | ||
93 | bh_lock_sock(sk); | |
b1235d79 | 94 | |
f62e4323 MH |
95 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
96 | reason = ECONNREFUSED; | |
97 | else if (sk->sk_state == BT_CONNECT && | |
2af6b9d5 | 98 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
b1235d79 MH |
99 | reason = ECONNREFUSED; |
100 | else | |
101 | reason = ETIMEDOUT; | |
102 | ||
103 | __l2cap_sock_close(sk, reason); | |
104 | ||
1da177e4 LT |
105 | bh_unlock_sock(sk); |
106 | ||
107 | l2cap_sock_kill(sk); | |
108 | sock_put(sk); | |
109 | } | |
110 | ||
111 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
112 | { | |
113 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
114 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
115 | } | |
116 | ||
117 | static void l2cap_sock_clear_timer(struct sock *sk) | |
118 | { | |
119 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
120 | sk_stop_timer(sk, &sk->sk_timer); | |
121 | } | |
122 | ||
0139418c MH |
123 | /* ---- L2CAP channels ---- */ |
124 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
125 | { | |
126 | struct sock *s; | |
127 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
128 | if (l2cap_pi(s)->dcid == cid) | |
129 | break; | |
130 | } | |
131 | return s; | |
132 | } | |
133 | ||
134 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
135 | { | |
136 | struct sock *s; | |
137 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
138 | if (l2cap_pi(s)->scid == cid) | |
139 | break; | |
140 | } | |
141 | return s; | |
142 | } | |
143 | ||
144 | /* Find channel with given SCID. | |
145 | * Returns locked socket */ | |
146 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
147 | { | |
148 | struct sock *s; | |
149 | read_lock(&l->lock); | |
150 | s = __l2cap_get_chan_by_scid(l, cid); | |
af05b30b GP |
151 | if (s) |
152 | bh_lock_sock(s); | |
0139418c MH |
153 | read_unlock(&l->lock); |
154 | return s; | |
155 | } | |
156 | ||
157 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
158 | { | |
159 | struct sock *s; | |
160 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
161 | if (l2cap_pi(s)->ident == ident) | |
162 | break; | |
163 | } | |
164 | return s; | |
165 | } | |
166 | ||
167 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
168 | { | |
169 | struct sock *s; | |
170 | read_lock(&l->lock); | |
171 | s = __l2cap_get_chan_by_ident(l, ident); | |
af05b30b GP |
172 | if (s) |
173 | bh_lock_sock(s); | |
0139418c MH |
174 | read_unlock(&l->lock); |
175 | return s; | |
176 | } | |
177 | ||
178 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
179 | { | |
8db4dc46 | 180 | u16 cid = L2CAP_CID_DYN_START; |
0139418c | 181 | |
8db4dc46 | 182 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
af05b30b | 183 | if (!__l2cap_get_chan_by_scid(l, cid)) |
0139418c MH |
184 | return cid; |
185 | } | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
191 | { | |
192 | sock_hold(sk); | |
193 | ||
194 | if (l->head) | |
195 | l2cap_pi(l->head)->prev_c = sk; | |
196 | ||
197 | l2cap_pi(sk)->next_c = l->head; | |
198 | l2cap_pi(sk)->prev_c = NULL; | |
199 | l->head = sk; | |
200 | } | |
201 | ||
202 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
203 | { | |
204 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
205 | ||
fd1278d7 | 206 | write_lock_bh(&l->lock); |
0139418c MH |
207 | if (sk == l->head) |
208 | l->head = next; | |
209 | ||
210 | if (next) | |
211 | l2cap_pi(next)->prev_c = prev; | |
212 | if (prev) | |
213 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 214 | write_unlock_bh(&l->lock); |
0139418c MH |
215 | |
216 | __sock_put(sk); | |
217 | } | |
218 | ||
219 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
220 | { | |
221 | struct l2cap_chan_list *l = &conn->chan_list; | |
222 | ||
af05b30b GP |
223 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
224 | l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
0139418c | 225 | |
2950f21a MH |
226 | conn->disc_reason = 0x13; |
227 | ||
0139418c MH |
228 | l2cap_pi(sk)->conn = conn; |
229 | ||
bd3c9e25 | 230 | if (sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) { |
0139418c MH |
231 | /* Alloc CID for connection-oriented socket */ |
232 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
233 | } else if (sk->sk_type == SOCK_DGRAM) { | |
234 | /* Connectionless socket */ | |
8db4dc46 GP |
235 | l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS; |
236 | l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS; | |
0139418c MH |
237 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
238 | } else { | |
239 | /* Raw socket can send/recv signalling messages only */ | |
8db4dc46 GP |
240 | l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING; |
241 | l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING; | |
0139418c MH |
242 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
243 | } | |
244 | ||
245 | __l2cap_chan_link(l, sk); | |
246 | ||
247 | if (parent) | |
248 | bt_accept_enqueue(parent, sk); | |
249 | } | |
250 | ||
8e87d142 | 251 | /* Delete channel. |
0139418c MH |
252 | * Must be called on the locked socket. */ |
253 | static void l2cap_chan_del(struct sock *sk, int err) | |
254 | { | |
255 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
256 | struct sock *parent = bt_sk(sk)->parent; | |
257 | ||
258 | l2cap_sock_clear_timer(sk); | |
259 | ||
260 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
261 | ||
8e87d142 | 262 | if (conn) { |
0139418c MH |
263 | /* Unlink from channel list */ |
264 | l2cap_chan_unlink(&conn->chan_list, sk); | |
265 | l2cap_pi(sk)->conn = NULL; | |
266 | hci_conn_put(conn->hcon); | |
267 | } | |
268 | ||
b1235d79 | 269 | sk->sk_state = BT_CLOSED; |
0139418c MH |
270 | sock_set_flag(sk, SOCK_ZAPPED); |
271 | ||
272 | if (err) | |
273 | sk->sk_err = err; | |
274 | ||
275 | if (parent) { | |
276 | bt_accept_unlink(sk); | |
277 | parent->sk_data_ready(parent, 0); | |
278 | } else | |
279 | sk->sk_state_change(sk); | |
c13ffa62 GP |
280 | |
281 | skb_queue_purge(TX_QUEUE(sk)); | |
282 | ||
283 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
284 | struct srej_list *l, *tmp; | |
285 | ||
286 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
287 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
288 | del_timer(&l2cap_pi(sk)->ack_timer); | |
289 | ||
290 | skb_queue_purge(SREJ_QUEUE(sk)); | |
291 | skb_queue_purge(BUSY_QUEUE(sk)); | |
292 | ||
293 | list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) { | |
294 | list_del(&l->list); | |
295 | kfree(l); | |
296 | } | |
297 | } | |
0139418c MH |
298 | } |
299 | ||
79d554a6 | 300 | /* Service level security */ |
2af6b9d5 | 301 | static inline int l2cap_check_security(struct sock *sk) |
79d554a6 MH |
302 | { |
303 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
0684e5f9 MH |
304 | __u8 auth_type; |
305 | ||
00ae4af9 MH |
306 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
307 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
308 | auth_type = HCI_AT_NO_BONDING_MITM; | |
309 | else | |
af05b30b | 310 | auth_type = HCI_AT_NO_BONDING; |
00ae4af9 MH |
311 | |
312 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
313 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
314 | } else { | |
315 | switch (l2cap_pi(sk)->sec_level) { | |
316 | case BT_SECURITY_HIGH: | |
317 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
318 | break; | |
319 | case BT_SECURITY_MEDIUM: | |
320 | auth_type = HCI_AT_GENERAL_BONDING; | |
321 | break; | |
322 | default: | |
323 | auth_type = HCI_AT_NO_BONDING; | |
324 | break; | |
325 | } | |
0684e5f9 | 326 | } |
79d554a6 | 327 | |
0684e5f9 MH |
328 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
329 | auth_type); | |
79d554a6 MH |
330 | } |
331 | ||
4e8402a3 MH |
332 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
333 | { | |
334 | u8 id; | |
335 | ||
336 | /* Get next available identificator. | |
337 | * 1 - 128 are used by kernel. | |
338 | * 129 - 199 are reserved. | |
339 | * 200 - 254 are used by utilities like l2ping, etc. | |
340 | */ | |
341 | ||
342 | spin_lock_bh(&conn->lock); | |
343 | ||
344 | if (++conn->tx_ident > 128) | |
345 | conn->tx_ident = 1; | |
346 | ||
347 | id = conn->tx_ident; | |
348 | ||
349 | spin_unlock_bh(&conn->lock); | |
350 | ||
351 | return id; | |
352 | } | |
353 | ||
9a9c6a34 | 354 | static inline void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) |
4e8402a3 MH |
355 | { |
356 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
357 | ||
358 | BT_DBG("code 0x%2.2x", code); | |
359 | ||
360 | if (!skb) | |
9a9c6a34 | 361 | return; |
4e8402a3 | 362 | |
9a9c6a34 | 363 | hci_send_acl(conn->hcon, skb, 0); |
4e8402a3 MH |
364 | } |
365 | ||
9a9c6a34 | 366 | static inline void l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control) |
1c2acffb GP |
367 | { |
368 | struct sk_buff *skb; | |
369 | struct l2cap_hdr *lh; | |
370 | struct l2cap_conn *conn = pi->conn; | |
c13ffa62 | 371 | struct sock *sk = (struct sock *)pi; |
fcc203c3 GP |
372 | int count, hlen = L2CAP_HDR_SIZE + 2; |
373 | ||
c13ffa62 GP |
374 | if (sk->sk_state != BT_CONNECTED) |
375 | return; | |
376 | ||
fcc203c3 GP |
377 | if (pi->fcs == L2CAP_FCS_CRC16) |
378 | hlen += 2; | |
1c2acffb GP |
379 | |
380 | BT_DBG("pi %p, control 0x%2.2x", pi, control); | |
381 | ||
fcc203c3 | 382 | count = min_t(unsigned int, conn->mtu, hlen); |
1c2acffb GP |
383 | control |= L2CAP_CTRL_FRAME_TYPE; |
384 | ||
9e917af1 GP |
385 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
386 | control |= L2CAP_CTRL_FINAL; | |
387 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
388 | } | |
389 | ||
f0946ccf GP |
390 | if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { |
391 | control |= L2CAP_CTRL_POLL; | |
392 | pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; | |
393 | } | |
394 | ||
1c2acffb GP |
395 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
396 | if (!skb) | |
9a9c6a34 | 397 | return; |
1c2acffb GP |
398 | |
399 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
fcc203c3 | 400 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
1c2acffb GP |
401 | lh->cid = cpu_to_le16(pi->dcid); |
402 | put_unaligned_le16(control, skb_put(skb, 2)); | |
403 | ||
fcc203c3 GP |
404 | if (pi->fcs == L2CAP_FCS_CRC16) { |
405 | u16 fcs = crc16(0, (u8 *)lh, count - 2); | |
406 | put_unaligned_le16(fcs, skb_put(skb, 2)); | |
407 | } | |
408 | ||
9a9c6a34 | 409 | hci_send_acl(pi->conn->hcon, skb, 0); |
1c2acffb GP |
410 | } |
411 | ||
9a9c6a34 | 412 | static inline void l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control) |
7e743090 | 413 | { |
1890d36b | 414 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { |
7e743090 | 415 | control |= L2CAP_SUPER_RCV_NOT_READY; |
1890d36b GP |
416 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
417 | } else | |
7e743090 GP |
418 | control |= L2CAP_SUPER_RCV_READY; |
419 | ||
2ab25cdd GP |
420 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
421 | ||
9a9c6a34 | 422 | l2cap_send_sframe(pi, control); |
7e743090 GP |
423 | } |
424 | ||
e501d055 AE |
425 | static inline int __l2cap_no_conn_pending(struct sock *sk) |
426 | { | |
427 | return !(l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND); | |
428 | } | |
429 | ||
79d554a6 MH |
430 | static void l2cap_do_start(struct sock *sk) |
431 | { | |
432 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
433 | ||
434 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
984947dc MH |
435 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
436 | return; | |
437 | ||
e501d055 | 438 | if (l2cap_check_security(sk) && __l2cap_no_conn_pending(sk)) { |
b1235d79 MH |
439 | struct l2cap_conn_req req; |
440 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
441 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 442 | |
b1235d79 | 443 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
e501d055 | 444 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
79d554a6 | 445 | |
b1235d79 | 446 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 447 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 448 | } |
79d554a6 MH |
449 | } else { |
450 | struct l2cap_info_req req; | |
451 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
452 | ||
453 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
454 | conn->info_ident = l2cap_get_ident(conn); | |
455 | ||
456 | mod_timer(&conn->info_timer, jiffies + | |
457 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
458 | ||
459 | l2cap_send_cmd(conn, conn->info_ident, | |
460 | L2CAP_INFO_REQ, sizeof(req), &req); | |
461 | } | |
462 | } | |
463 | ||
cf6c2c0b GP |
464 | static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
465 | { | |
466 | u32 local_feat_mask = l2cap_feat_mask; | |
d1c4a17d | 467 | if (!disable_ertm) |
cf6c2c0b GP |
468 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
469 | ||
470 | switch (mode) { | |
471 | case L2CAP_MODE_ERTM: | |
472 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; | |
473 | case L2CAP_MODE_STREAMING: | |
474 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; | |
475 | default: | |
476 | return 0x00; | |
477 | } | |
478 | } | |
479 | ||
9b108fc0 | 480 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk, int err) |
22121fc9 GP |
481 | { |
482 | struct l2cap_disconn_req req; | |
483 | ||
c13ffa62 GP |
484 | if (!conn) |
485 | return; | |
486 | ||
487 | skb_queue_purge(TX_QUEUE(sk)); | |
488 | ||
489 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
490 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
491 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
492 | del_timer(&l2cap_pi(sk)->ack_timer); | |
493 | } | |
494 | ||
22121fc9 GP |
495 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
496 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
497 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
498 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
c13ffa62 GP |
499 | |
500 | sk->sk_state = BT_DISCONN; | |
9b108fc0 | 501 | sk->sk_err = err; |
22121fc9 GP |
502 | } |
503 | ||
1da177e4 | 504 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
505 | static void l2cap_conn_start(struct l2cap_conn *conn) |
506 | { | |
507 | struct l2cap_chan_list *l = &conn->chan_list; | |
cf6c2c0b | 508 | struct sock_del_list del, *tmp1, *tmp2; |
4e8402a3 MH |
509 | struct sock *sk; |
510 | ||
511 | BT_DBG("conn %p", conn); | |
512 | ||
cf6c2c0b GP |
513 | INIT_LIST_HEAD(&del.list); |
514 | ||
4e8402a3 MH |
515 | read_lock(&l->lock); |
516 | ||
517 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
518 | bh_lock_sock(sk); | |
519 | ||
bd3c9e25 GP |
520 | if (sk->sk_type != SOCK_SEQPACKET && |
521 | sk->sk_type != SOCK_STREAM) { | |
79d554a6 MH |
522 | bh_unlock_sock(sk); |
523 | continue; | |
524 | } | |
525 | ||
526 | if (sk->sk_state == BT_CONNECT) { | |
47731de7 | 527 | struct l2cap_conn_req req; |
79d554a6 | 528 | |
47731de7 GP |
529 | if (!l2cap_check_security(sk) || |
530 | !__l2cap_no_conn_pending(sk)) { | |
531 | bh_unlock_sock(sk); | |
532 | continue; | |
533 | } | |
79d554a6 | 534 | |
47731de7 GP |
535 | if (!l2cap_mode_supported(l2cap_pi(sk)->mode, |
536 | conn->feat_mask) | |
537 | && l2cap_pi(sk)->conf_state & | |
538 | L2CAP_CONF_STATE2_DEVICE) { | |
539 | tmp1 = kzalloc(sizeof(struct sock_del_list), | |
540 | GFP_ATOMIC); | |
541 | tmp1->sk = sk; | |
542 | list_add_tail(&tmp1->list, &del.list); | |
543 | bh_unlock_sock(sk); | |
544 | continue; | |
b1235d79 | 545 | } |
47731de7 GP |
546 | |
547 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
548 | req.psm = l2cap_pi(sk)->psm; | |
549 | ||
550 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); | |
551 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; | |
552 | ||
553 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
554 | L2CAP_CONN_REQ, sizeof(req), &req); | |
555 | ||
79d554a6 MH |
556 | } else if (sk->sk_state == BT_CONNECT2) { |
557 | struct l2cap_conn_rsp rsp; | |
e9aeb2dd | 558 | char buf[128]; |
79d554a6 MH |
559 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
560 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
561 | ||
2af6b9d5 | 562 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
563 | if (bt_sk(sk)->defer_setup) { |
564 | struct sock *parent = bt_sk(sk)->parent; | |
565 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
566 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
567 | parent->sk_data_ready(parent, 0); | |
568 | ||
569 | } else { | |
570 | sk->sk_state = BT_CONFIG; | |
571 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
572 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
573 | } | |
79d554a6 MH |
574 | } else { |
575 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
576 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
577 | } | |
578 | ||
579 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
580 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
e9aeb2dd GP |
581 | |
582 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT || | |
583 | rsp.result != L2CAP_CR_SUCCESS) { | |
584 | bh_unlock_sock(sk); | |
585 | continue; | |
586 | } | |
587 | ||
588 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
589 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
590 | l2cap_build_conf_req(sk, buf), buf); | |
591 | l2cap_pi(sk)->num_conf_req++; | |
4e8402a3 MH |
592 | } |
593 | ||
594 | bh_unlock_sock(sk); | |
595 | } | |
596 | ||
597 | read_unlock(&l->lock); | |
cf6c2c0b GP |
598 | |
599 | list_for_each_entry_safe(tmp1, tmp2, &del.list, list) { | |
600 | bh_lock_sock(tmp1->sk); | |
601 | __l2cap_sock_close(tmp1->sk, ECONNRESET); | |
602 | bh_unlock_sock(tmp1->sk); | |
603 | list_del(&tmp1->list); | |
604 | kfree(tmp1); | |
605 | } | |
4e8402a3 MH |
606 | } |
607 | ||
608 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
609 | { | |
79d554a6 MH |
610 | struct l2cap_chan_list *l = &conn->chan_list; |
611 | struct sock *sk; | |
4e8402a3 | 612 | |
79d554a6 | 613 | BT_DBG("conn %p", conn); |
4e8402a3 | 614 | |
79d554a6 | 615 | read_lock(&l->lock); |
4e8402a3 | 616 | |
79d554a6 MH |
617 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
618 | bh_lock_sock(sk); | |
4e8402a3 | 619 | |
bd3c9e25 GP |
620 | if (sk->sk_type != SOCK_SEQPACKET && |
621 | sk->sk_type != SOCK_STREAM) { | |
79d554a6 MH |
622 | l2cap_sock_clear_timer(sk); |
623 | sk->sk_state = BT_CONNECTED; | |
624 | sk->sk_state_change(sk); | |
625 | } else if (sk->sk_state == BT_CONNECT) | |
626 | l2cap_do_start(sk); | |
4e8402a3 | 627 | |
79d554a6 | 628 | bh_unlock_sock(sk); |
4e8402a3 | 629 | } |
79d554a6 MH |
630 | |
631 | read_unlock(&l->lock); | |
4e8402a3 MH |
632 | } |
633 | ||
634 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
635 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
636 | { | |
637 | struct l2cap_chan_list *l = &conn->chan_list; | |
638 | struct sock *sk; | |
639 | ||
640 | BT_DBG("conn %p", conn); | |
641 | ||
642 | read_lock(&l->lock); | |
643 | ||
644 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 645 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
646 | sk->sk_err = err; |
647 | } | |
648 | ||
649 | read_unlock(&l->lock); | |
650 | } | |
651 | ||
652 | static void l2cap_info_timeout(unsigned long arg) | |
653 | { | |
654 | struct l2cap_conn *conn = (void *) arg; | |
655 | ||
984947dc | 656 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 657 | conn->info_ident = 0; |
984947dc | 658 | |
4e8402a3 MH |
659 | l2cap_conn_start(conn); |
660 | } | |
661 | ||
1da177e4 LT |
662 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
663 | { | |
0139418c | 664 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 665 | |
0139418c | 666 | if (conn || status) |
1da177e4 LT |
667 | return conn; |
668 | ||
0139418c MH |
669 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
670 | if (!conn) | |
1da177e4 | 671 | return NULL; |
1da177e4 LT |
672 | |
673 | hcon->l2cap_data = conn; | |
674 | conn->hcon = hcon; | |
675 | ||
0139418c MH |
676 | BT_DBG("hcon %p conn %p", hcon, conn); |
677 | ||
1da177e4 LT |
678 | conn->mtu = hcon->hdev->acl_mtu; |
679 | conn->src = &hcon->hdev->bdaddr; | |
680 | conn->dst = &hcon->dst; | |
681 | ||
4e8402a3 MH |
682 | conn->feat_mask = 0; |
683 | ||
1da177e4 LT |
684 | spin_lock_init(&conn->lock); |
685 | rwlock_init(&conn->chan_list.lock); | |
686 | ||
45054dc1 DY |
687 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
688 | (unsigned long) conn); | |
689 | ||
2950f21a MH |
690 | conn->disc_reason = 0x13; |
691 | ||
1da177e4 LT |
692 | return conn; |
693 | } | |
694 | ||
0139418c | 695 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 696 | { |
0139418c | 697 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
698 | struct sock *sk; |
699 | ||
0139418c MH |
700 | if (!conn) |
701 | return; | |
1da177e4 LT |
702 | |
703 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
704 | ||
7585b97a | 705 | kfree_skb(conn->rx_skb); |
1da177e4 LT |
706 | |
707 | /* Kill channels */ | |
708 | while ((sk = conn->chan_list.head)) { | |
709 | bh_lock_sock(sk); | |
710 | l2cap_chan_del(sk, err); | |
711 | bh_unlock_sock(sk); | |
712 | l2cap_sock_kill(sk); | |
713 | } | |
714 | ||
8e8440f5 DY |
715 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
716 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 717 | |
1da177e4 LT |
718 | hcon->l2cap_data = NULL; |
719 | kfree(conn); | |
1da177e4 LT |
720 | } |
721 | ||
722 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
723 | { | |
724 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 725 | write_lock_bh(&l->lock); |
1da177e4 | 726 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 727 | write_unlock_bh(&l->lock); |
1da177e4 LT |
728 | } |
729 | ||
1da177e4 | 730 | /* ---- Socket interface ---- */ |
8e036fc3 | 731 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
732 | { |
733 | struct sock *sk; | |
734 | struct hlist_node *node; | |
735 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
736 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
737 | goto found; | |
738 | sk = NULL; | |
739 | found: | |
740 | return sk; | |
741 | } | |
742 | ||
743 | /* Find socket with psm and source bdaddr. | |
744 | * Returns closest match. | |
745 | */ | |
8e036fc3 | 746 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
747 | { |
748 | struct sock *sk = NULL, *sk1 = NULL; | |
749 | struct hlist_node *node; | |
750 | ||
751 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
752 | if (state && sk->sk_state != state) | |
753 | continue; | |
754 | ||
755 | if (l2cap_pi(sk)->psm == psm) { | |
756 | /* Exact match. */ | |
757 | if (!bacmp(&bt_sk(sk)->src, src)) | |
758 | break; | |
759 | ||
760 | /* Closest match */ | |
761 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
762 | sk1 = sk; | |
763 | } | |
764 | } | |
765 | return node ? sk : sk1; | |
766 | } | |
767 | ||
768 | /* Find socket with given address (psm, src). | |
769 | * Returns locked socket */ | |
8e036fc3 | 770 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
771 | { |
772 | struct sock *s; | |
773 | read_lock(&l2cap_sk_list.lock); | |
774 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
af05b30b GP |
775 | if (s) |
776 | bh_lock_sock(s); | |
1da177e4 LT |
777 | read_unlock(&l2cap_sk_list.lock); |
778 | return s; | |
779 | } | |
780 | ||
781 | static void l2cap_sock_destruct(struct sock *sk) | |
782 | { | |
783 | BT_DBG("sk %p", sk); | |
784 | ||
785 | skb_queue_purge(&sk->sk_receive_queue); | |
786 | skb_queue_purge(&sk->sk_write_queue); | |
787 | } | |
788 | ||
789 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
790 | { | |
791 | struct sock *sk; | |
792 | ||
793 | BT_DBG("parent %p", parent); | |
794 | ||
795 | /* Close not yet accepted channels */ | |
796 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
797 | l2cap_sock_close(sk); | |
798 | ||
b1235d79 | 799 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
800 | sock_set_flag(parent, SOCK_ZAPPED); |
801 | } | |
802 | ||
803 | /* Kill socket (only if zapped and orphan) | |
804 | * Must be called on unlocked socket. | |
805 | */ | |
806 | static void l2cap_sock_kill(struct sock *sk) | |
807 | { | |
808 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
809 | return; | |
810 | ||
811 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
812 | ||
813 | /* Kill poor orphan */ | |
814 | bt_sock_unlink(&l2cap_sk_list, sk); | |
815 | sock_set_flag(sk, SOCK_DEAD); | |
816 | sock_put(sk); | |
817 | } | |
818 | ||
819 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
820 | { | |
821 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
822 | ||
823 | switch (sk->sk_state) { | |
824 | case BT_LISTEN: | |
825 | l2cap_sock_cleanup_listen(sk); | |
826 | break; | |
827 | ||
828 | case BT_CONNECTED: | |
829 | case BT_CONFIG: | |
bd3c9e25 GP |
830 | if (sk->sk_type == SOCK_SEQPACKET || |
831 | sk->sk_type == SOCK_STREAM) { | |
1da177e4 | 832 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
1da177e4 | 833 | |
1da177e4 | 834 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
9b108fc0 | 835 | l2cap_send_disconn_req(conn, sk, reason); |
b1235d79 | 836 | } else |
1da177e4 | 837 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
838 | break; |
839 | ||
f66dc81f | 840 | case BT_CONNECT2: |
bd3c9e25 GP |
841 | if (sk->sk_type == SOCK_SEQPACKET || |
842 | sk->sk_type == SOCK_STREAM) { | |
f66dc81f MH |
843 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
844 | struct l2cap_conn_rsp rsp; | |
845 | __u16 result; | |
846 | ||
847 | if (bt_sk(sk)->defer_setup) | |
848 | result = L2CAP_CR_SEC_BLOCK; | |
849 | else | |
850 | result = L2CAP_CR_BAD_PSM; | |
851 | ||
852 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
853 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
854 | rsp.result = cpu_to_le16(result); | |
855 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
856 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
857 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
858 | } else | |
859 | l2cap_chan_del(sk, reason); | |
860 | break; | |
861 | ||
1da177e4 LT |
862 | case BT_CONNECT: |
863 | case BT_DISCONN: | |
864 | l2cap_chan_del(sk, reason); | |
865 | break; | |
866 | ||
867 | default: | |
868 | sock_set_flag(sk, SOCK_ZAPPED); | |
869 | break; | |
870 | } | |
871 | } | |
872 | ||
873 | /* Must be called on unlocked socket. */ | |
874 | static void l2cap_sock_close(struct sock *sk) | |
875 | { | |
876 | l2cap_sock_clear_timer(sk); | |
877 | lock_sock(sk); | |
878 | __l2cap_sock_close(sk, ECONNRESET); | |
879 | release_sock(sk); | |
880 | l2cap_sock_kill(sk); | |
881 | } | |
882 | ||
883 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
884 | { | |
885 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
886 | ||
887 | BT_DBG("sk %p", sk); | |
888 | ||
889 | if (parent) { | |
890 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
891 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
892 | ||
1da177e4 LT |
893 | pi->imtu = l2cap_pi(parent)->imtu; |
894 | pi->omtu = l2cap_pi(parent)->omtu; | |
85eb53c6 | 895 | pi->conf_state = l2cap_pi(parent)->conf_state; |
c6b03cf9 MH |
896 | pi->mode = l2cap_pi(parent)->mode; |
897 | pi->fcs = l2cap_pi(parent)->fcs; | |
68d7f0ce | 898 | pi->max_tx = l2cap_pi(parent)->max_tx; |
14b5aa71 | 899 | pi->tx_win = l2cap_pi(parent)->tx_win; |
2af6b9d5 MH |
900 | pi->sec_level = l2cap_pi(parent)->sec_level; |
901 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
902 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
903 | } else { |
904 | pi->imtu = L2CAP_DEFAULT_MTU; | |
905 | pi->omtu = 0; | |
d1c4a17d | 906 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
bd3c9e25 | 907 | pi->mode = L2CAP_MODE_ERTM; |
85eb53c6 GP |
908 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
909 | } else { | |
bd3c9e25 | 910 | pi->mode = L2CAP_MODE_BASIC; |
85eb53c6 | 911 | } |
fd059b9b | 912 | pi->max_tx = L2CAP_DEFAULT_MAX_TX; |
c6b03cf9 | 913 | pi->fcs = L2CAP_FCS_CRC16; |
fd059b9b | 914 | pi->tx_win = L2CAP_DEFAULT_TX_WINDOW; |
2af6b9d5 MH |
915 | pi->sec_level = BT_SECURITY_LOW; |
916 | pi->role_switch = 0; | |
917 | pi->force_reliable = 0; | |
1da177e4 LT |
918 | } |
919 | ||
920 | /* Default config options */ | |
5dee9e7c | 921 | pi->conf_len = 0; |
1da177e4 | 922 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
45054dc1 DY |
923 | skb_queue_head_init(TX_QUEUE(sk)); |
924 | skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b | 925 | skb_queue_head_init(BUSY_QUEUE(sk)); |
45054dc1 | 926 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
1da177e4 LT |
927 | } |
928 | ||
929 | static struct proto l2cap_proto = { | |
930 | .name = "L2CAP", | |
931 | .owner = THIS_MODULE, | |
932 | .obj_size = sizeof(struct l2cap_pinfo) | |
933 | }; | |
934 | ||
1b8d7ae4 | 935 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
936 | { |
937 | struct sock *sk; | |
938 | ||
6257ff21 | 939 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
940 | if (!sk) |
941 | return NULL; | |
942 | ||
943 | sock_init_data(sock, sk); | |
944 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
945 | ||
946 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 947 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
948 | |
949 | sock_reset_flag(sk, SOCK_ZAPPED); | |
950 | ||
951 | sk->sk_protocol = proto; | |
b1235d79 | 952 | sk->sk_state = BT_OPEN; |
1da177e4 | 953 | |
b1235d79 | 954 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
955 | |
956 | bt_sock_link(&l2cap_sk_list, sk); | |
957 | return sk; | |
958 | } | |
959 | ||
3f378b68 EP |
960 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, |
961 | int kern) | |
1da177e4 LT |
962 | { |
963 | struct sock *sk; | |
964 | ||
965 | BT_DBG("sock %p", sock); | |
966 | ||
967 | sock->state = SS_UNCONNECTED; | |
968 | ||
bd3c9e25 | 969 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && |
1da177e4 LT |
970 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
971 | return -ESOCKTNOSUPPORT; | |
972 | ||
c84b3268 | 973 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
1da177e4 LT |
974 | return -EPERM; |
975 | ||
976 | sock->ops = &l2cap_sock_ops; | |
977 | ||
1b8d7ae4 | 978 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
979 | if (!sk) |
980 | return -ENOMEM; | |
981 | ||
982 | l2cap_sock_init(sk, NULL); | |
983 | return 0; | |
984 | } | |
985 | ||
f29972de | 986 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
1da177e4 | 987 | { |
1da177e4 | 988 | struct sock *sk = sock->sk; |
f29972de MH |
989 | struct sockaddr_l2 la; |
990 | int len, err = 0; | |
1da177e4 | 991 | |
f29972de | 992 | BT_DBG("sk %p", sk); |
1da177e4 LT |
993 | |
994 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
995 | return -EINVAL; | |
996 | ||
f29972de MH |
997 | memset(&la, 0, sizeof(la)); |
998 | len = min_t(unsigned int, sizeof(la), alen); | |
999 | memcpy(&la, addr, len); | |
1000 | ||
2a517ca6 MH |
1001 | if (la.l2_cid) |
1002 | return -EINVAL; | |
1003 | ||
1da177e4 LT |
1004 | lock_sock(sk); |
1005 | ||
1006 | if (sk->sk_state != BT_OPEN) { | |
1007 | err = -EBADFD; | |
1008 | goto done; | |
1009 | } | |
1010 | ||
0fba2558 MM |
1011 | if (la.l2_psm) { |
1012 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
1013 | ||
1014 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
1015 | if ((psm & 0x0101) != 0x0001) { | |
1016 | err = -EINVAL; | |
1017 | goto done; | |
1018 | } | |
1019 | ||
1020 | /* Restrict usage of well-known PSMs */ | |
1021 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
1022 | err = -EACCES; | |
1023 | goto done; | |
1024 | } | |
847641d7 | 1025 | } |
8e87d142 | 1026 | |
1da177e4 LT |
1027 | write_lock_bh(&l2cap_sk_list.lock); |
1028 | ||
f29972de | 1029 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
1da177e4 LT |
1030 | err = -EADDRINUSE; |
1031 | } else { | |
1032 | /* Save source address */ | |
f29972de MH |
1033 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
1034 | l2cap_pi(sk)->psm = la.l2_psm; | |
1035 | l2cap_pi(sk)->sport = la.l2_psm; | |
1da177e4 | 1036 | sk->sk_state = BT_BOUND; |
2af6b9d5 | 1037 | |
b4324b5d MH |
1038 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
1039 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
2af6b9d5 | 1040 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
1da177e4 LT |
1041 | } |
1042 | ||
1043 | write_unlock_bh(&l2cap_sk_list.lock); | |
1044 | ||
1045 | done: | |
1046 | release_sock(sk); | |
1047 | return err; | |
1048 | } | |
1049 | ||
1050 | static int l2cap_do_connect(struct sock *sk) | |
1051 | { | |
1052 | bdaddr_t *src = &bt_sk(sk)->src; | |
1053 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
1054 | struct l2cap_conn *conn; | |
1055 | struct hci_conn *hcon; | |
1056 | struct hci_dev *hdev; | |
09ab6f4c | 1057 | __u8 auth_type; |
44d0e48e | 1058 | int err; |
1da177e4 | 1059 | |
f29972de MH |
1060 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
1061 | l2cap_pi(sk)->psm); | |
1da177e4 | 1062 | |
af05b30b GP |
1063 | hdev = hci_get_route(dst, src); |
1064 | if (!hdev) | |
1da177e4 LT |
1065 | return -EHOSTUNREACH; |
1066 | ||
1067 | hci_dev_lock_bh(hdev); | |
1068 | ||
1069 | err = -ENOMEM; | |
1070 | ||
8c1b2355 | 1071 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
1072 | switch (l2cap_pi(sk)->sec_level) { |
1073 | case BT_SECURITY_HIGH: | |
8c1b2355 | 1074 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
1075 | break; |
1076 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 1077 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
1078 | break; |
1079 | default: | |
09ab6f4c | 1080 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
1081 | break; |
1082 | } | |
8c1b2355 | 1083 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 1084 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 1085 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 1086 | else |
8c1b2355 | 1087 | auth_type = HCI_AT_NO_BONDING; |
435fef20 MH |
1088 | |
1089 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
1090 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
8c1b2355 | 1091 | } else { |
2af6b9d5 MH |
1092 | switch (l2cap_pi(sk)->sec_level) { |
1093 | case BT_SECURITY_HIGH: | |
8c1b2355 | 1094 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
1095 | break; |
1096 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 1097 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
1098 | break; |
1099 | default: | |
8c1b2355 | 1100 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
1101 | break; |
1102 | } | |
09ab6f4c MH |
1103 | } |
1104 | ||
2af6b9d5 MH |
1105 | hcon = hci_connect(hdev, ACL_LINK, dst, |
1106 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
1107 | if (!hcon) |
1108 | goto done; | |
1109 | ||
1110 | conn = l2cap_conn_add(hcon, 0); | |
1111 | if (!conn) { | |
1112 | hci_conn_put(hcon); | |
1113 | goto done; | |
1114 | } | |
1115 | ||
1116 | err = 0; | |
1117 | ||
1118 | /* Update source addr of the socket */ | |
1119 | bacpy(src, conn->src); | |
1120 | ||
1121 | l2cap_chan_add(conn, sk, NULL); | |
1122 | ||
1123 | sk->sk_state = BT_CONNECT; | |
1124 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1125 | ||
1126 | if (hcon->state == BT_CONNECTED) { | |
bd3c9e25 GP |
1127 | if (sk->sk_type != SOCK_SEQPACKET && |
1128 | sk->sk_type != SOCK_STREAM) { | |
1da177e4 LT |
1129 | l2cap_sock_clear_timer(sk); |
1130 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
1131 | } else |
1132 | l2cap_do_start(sk); | |
1da177e4 LT |
1133 | } |
1134 | ||
1135 | done: | |
1136 | hci_dev_unlock_bh(hdev); | |
1137 | hci_dev_put(hdev); | |
1138 | return err; | |
1139 | } | |
1140 | ||
1141 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
1142 | { | |
1da177e4 | 1143 | struct sock *sk = sock->sk; |
f29972de MH |
1144 | struct sockaddr_l2 la; |
1145 | int len, err = 0; | |
1da177e4 | 1146 | |
1da177e4 LT |
1147 | BT_DBG("sk %p", sk); |
1148 | ||
6503d961 CG |
1149 | if (!addr || alen < sizeof(addr->sa_family) || |
1150 | addr->sa_family != AF_BLUETOOTH) | |
2a517ca6 | 1151 | return -EINVAL; |
1da177e4 | 1152 | |
f29972de MH |
1153 | memset(&la, 0, sizeof(la)); |
1154 | len = min_t(unsigned int, sizeof(la), alen); | |
1155 | memcpy(&la, addr, len); | |
1156 | ||
2a517ca6 MH |
1157 | if (la.l2_cid) |
1158 | return -EINVAL; | |
1159 | ||
1160 | lock_sock(sk); | |
1161 | ||
bd3c9e25 GP |
1162 | if ((sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) |
1163 | && !la.l2_psm) { | |
1da177e4 LT |
1164 | err = -EINVAL; |
1165 | goto done; | |
1166 | } | |
1167 | ||
c6b03cf9 MH |
1168 | switch (l2cap_pi(sk)->mode) { |
1169 | case L2CAP_MODE_BASIC: | |
1170 | break; | |
1171 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1172 | case L2CAP_MODE_STREAMING: |
d1c4a17d | 1173 | if (!disable_ertm) |
c6b03cf9 MH |
1174 | break; |
1175 | /* fall through */ | |
1176 | default: | |
1177 | err = -ENOTSUPP; | |
1178 | goto done; | |
1179 | } | |
1180 | ||
af05b30b | 1181 | switch (sk->sk_state) { |
1da177e4 LT |
1182 | case BT_CONNECT: |
1183 | case BT_CONNECT2: | |
1184 | case BT_CONFIG: | |
1185 | /* Already connecting */ | |
1186 | goto wait; | |
1187 | ||
1188 | case BT_CONNECTED: | |
1189 | /* Already connected */ | |
8b0dc6dc | 1190 | err = -EISCONN; |
1da177e4 LT |
1191 | goto done; |
1192 | ||
1193 | case BT_OPEN: | |
1194 | case BT_BOUND: | |
1195 | /* Can connect */ | |
1196 | break; | |
1197 | ||
1198 | default: | |
1199 | err = -EBADFD; | |
1200 | goto done; | |
1201 | } | |
1202 | ||
0fba2558 MM |
1203 | /* PSM must be odd and lsb of upper byte must be 0 */ |
1204 | if ((__le16_to_cpu(la.l2_psm) & 0x0101) != 0x0001 && | |
1205 | sk->sk_type != SOCK_RAW) { | |
1206 | err = -EINVAL; | |
1207 | goto done; | |
1208 | } | |
1209 | ||
1da177e4 | 1210 | /* Set destination address and psm */ |
f29972de MH |
1211 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
1212 | l2cap_pi(sk)->psm = la.l2_psm; | |
1da177e4 | 1213 | |
af05b30b GP |
1214 | err = l2cap_do_connect(sk); |
1215 | if (err) | |
1da177e4 LT |
1216 | goto done; |
1217 | ||
1218 | wait: | |
1219 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
1220 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
1221 | done: | |
1222 | release_sock(sk); | |
1223 | return err; | |
1224 | } | |
1225 | ||
1226 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
1227 | { | |
1228 | struct sock *sk = sock->sk; | |
1229 | int err = 0; | |
1230 | ||
1231 | BT_DBG("sk %p backlog %d", sk, backlog); | |
1232 | ||
1233 | lock_sock(sk); | |
1234 | ||
bd3c9e25 GP |
1235 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) |
1236 | || sk->sk_state != BT_BOUND) { | |
1da177e4 LT |
1237 | err = -EBADFD; |
1238 | goto done; | |
1239 | } | |
1240 | ||
c6b03cf9 MH |
1241 | switch (l2cap_pi(sk)->mode) { |
1242 | case L2CAP_MODE_BASIC: | |
1243 | break; | |
1244 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1245 | case L2CAP_MODE_STREAMING: |
d1c4a17d | 1246 | if (!disable_ertm) |
c6b03cf9 MH |
1247 | break; |
1248 | /* fall through */ | |
1249 | default: | |
1250 | err = -ENOTSUPP; | |
1251 | goto done; | |
1252 | } | |
1253 | ||
1da177e4 LT |
1254 | if (!l2cap_pi(sk)->psm) { |
1255 | bdaddr_t *src = &bt_sk(sk)->src; | |
1256 | u16 psm; | |
1257 | ||
1258 | err = -EINVAL; | |
1259 | ||
1260 | write_lock_bh(&l2cap_sk_list.lock); | |
1261 | ||
1262 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
b4324b5d MH |
1263 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
1264 | l2cap_pi(sk)->psm = cpu_to_le16(psm); | |
1265 | l2cap_pi(sk)->sport = cpu_to_le16(psm); | |
1da177e4 LT |
1266 | err = 0; |
1267 | break; | |
1268 | } | |
1269 | ||
1270 | write_unlock_bh(&l2cap_sk_list.lock); | |
1271 | ||
1272 | if (err < 0) | |
1273 | goto done; | |
1274 | } | |
1275 | ||
1276 | sk->sk_max_ack_backlog = backlog; | |
1277 | sk->sk_ack_backlog = 0; | |
1278 | sk->sk_state = BT_LISTEN; | |
1279 | ||
1280 | done: | |
1281 | release_sock(sk); | |
1282 | return err; | |
1283 | } | |
1284 | ||
1285 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
1286 | { | |
1287 | DECLARE_WAITQUEUE(wait, current); | |
1288 | struct sock *sk = sock->sk, *nsk; | |
1289 | long timeo; | |
1290 | int err = 0; | |
1291 | ||
fcc70d5f | 1292 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1293 | |
1294 | if (sk->sk_state != BT_LISTEN) { | |
1295 | err = -EBADFD; | |
1296 | goto done; | |
1297 | } | |
1298 | ||
1299 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1300 | ||
1301 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1302 | ||
1303 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 1304 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
1da177e4 LT |
1305 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { |
1306 | set_current_state(TASK_INTERRUPTIBLE); | |
1307 | if (!timeo) { | |
1308 | err = -EAGAIN; | |
1309 | break; | |
1310 | } | |
1311 | ||
1312 | release_sock(sk); | |
1313 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1314 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1315 | |
1316 | if (sk->sk_state != BT_LISTEN) { | |
1317 | err = -EBADFD; | |
1318 | break; | |
1319 | } | |
1320 | ||
1321 | if (signal_pending(current)) { | |
1322 | err = sock_intr_errno(timeo); | |
1323 | break; | |
1324 | } | |
1325 | } | |
1326 | set_current_state(TASK_RUNNING); | |
aa395145 | 1327 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
1328 | |
1329 | if (err) | |
1330 | goto done; | |
1331 | ||
1332 | newsock->state = SS_CONNECTED; | |
1333 | ||
1334 | BT_DBG("new socket %p", nsk); | |
1335 | ||
1336 | done: | |
1337 | release_sock(sk); | |
1338 | return err; | |
1339 | } | |
1340 | ||
1341 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1342 | { | |
1343 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1344 | struct sock *sk = sock->sk; | |
1345 | ||
1346 | BT_DBG("sock %p, sk %p", sock, sk); | |
1347 | ||
1348 | addr->sa_family = AF_BLUETOOTH; | |
1349 | *len = sizeof(struct sockaddr_l2); | |
1350 | ||
f29972de MH |
1351 | if (peer) { |
1352 | la->l2_psm = l2cap_pi(sk)->psm; | |
1da177e4 | 1353 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
b4324b5d | 1354 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
f29972de MH |
1355 | } else { |
1356 | la->l2_psm = l2cap_pi(sk)->sport; | |
1da177e4 | 1357 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
b4324b5d | 1358 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
f29972de | 1359 | } |
1da177e4 | 1360 | |
1da177e4 LT |
1361 | return 0; |
1362 | } | |
1363 | ||
6161c038 GP |
1364 | static int __l2cap_wait_ack(struct sock *sk) |
1365 | { | |
1366 | DECLARE_WAITQUEUE(wait, current); | |
1367 | int err = 0; | |
1368 | int timeo = HZ/5; | |
1369 | ||
2b0b05dd | 1370 | add_wait_queue(sk_sleep(sk), &wait); |
6161c038 GP |
1371 | while ((l2cap_pi(sk)->unacked_frames > 0 && l2cap_pi(sk)->conn)) { |
1372 | set_current_state(TASK_INTERRUPTIBLE); | |
1373 | ||
1374 | if (!timeo) | |
1375 | timeo = HZ/5; | |
1376 | ||
1377 | if (signal_pending(current)) { | |
1378 | err = sock_intr_errno(timeo); | |
1379 | break; | |
1380 | } | |
1381 | ||
1382 | release_sock(sk); | |
1383 | timeo = schedule_timeout(timeo); | |
1384 | lock_sock(sk); | |
1385 | ||
1386 | err = sock_error(sk); | |
1387 | if (err) | |
1388 | break; | |
1389 | } | |
1390 | set_current_state(TASK_RUNNING); | |
2b0b05dd | 1391 | remove_wait_queue(sk_sleep(sk), &wait); |
6161c038 GP |
1392 | return err; |
1393 | } | |
1394 | ||
e90bac06 GP |
1395 | static void l2cap_monitor_timeout(unsigned long arg) |
1396 | { | |
1397 | struct sock *sk = (void *) arg; | |
e90bac06 | 1398 | |
0e98958d GP |
1399 | BT_DBG("sk %p", sk); |
1400 | ||
e686219a | 1401 | bh_lock_sock(sk); |
e90bac06 | 1402 | if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { |
9b108fc0 | 1403 | l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk, ECONNABORTED); |
b13f5860 | 1404 | bh_unlock_sock(sk); |
e90bac06 GP |
1405 | return; |
1406 | } | |
1407 | ||
1408 | l2cap_pi(sk)->retry_count++; | |
1409 | __mod_monitor_timer(); | |
1410 | ||
a2e12a2a | 1411 | l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL); |
e686219a | 1412 | bh_unlock_sock(sk); |
e90bac06 GP |
1413 | } |
1414 | ||
1415 | static void l2cap_retrans_timeout(unsigned long arg) | |
1416 | { | |
1417 | struct sock *sk = (void *) arg; | |
e90bac06 | 1418 | |
0e98958d GP |
1419 | BT_DBG("sk %p", sk); |
1420 | ||
e686219a | 1421 | bh_lock_sock(sk); |
e90bac06 GP |
1422 | l2cap_pi(sk)->retry_count = 1; |
1423 | __mod_monitor_timer(); | |
1424 | ||
1425 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
1426 | ||
a2e12a2a | 1427 | l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL); |
e686219a | 1428 | bh_unlock_sock(sk); |
e90bac06 GP |
1429 | } |
1430 | ||
1c2acffb | 1431 | static void l2cap_drop_acked_frames(struct sock *sk) |
1da177e4 | 1432 | { |
1c2acffb | 1433 | struct sk_buff *skb; |
1da177e4 | 1434 | |
812e737e GP |
1435 | while ((skb = skb_peek(TX_QUEUE(sk))) && |
1436 | l2cap_pi(sk)->unacked_frames) { | |
1c2acffb GP |
1437 | if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq) |
1438 | break; | |
1da177e4 | 1439 | |
1c2acffb GP |
1440 | skb = skb_dequeue(TX_QUEUE(sk)); |
1441 | kfree_skb(skb); | |
1da177e4 | 1442 | |
1c2acffb GP |
1443 | l2cap_pi(sk)->unacked_frames--; |
1444 | } | |
1da177e4 | 1445 | |
e90bac06 GP |
1446 | if (!l2cap_pi(sk)->unacked_frames) |
1447 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
1c2acffb | 1448 | } |
1da177e4 | 1449 | |
9a9c6a34 | 1450 | static inline void l2cap_do_send(struct sock *sk, struct sk_buff *skb) |
1c2acffb GP |
1451 | { |
1452 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1c2acffb GP |
1453 | |
1454 | BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len); | |
1da177e4 | 1455 | |
9a9c6a34 | 1456 | hci_send_acl(pi->conn->hcon, skb, 0); |
1c2acffb GP |
1457 | } |
1458 | ||
305682e8 | 1459 | static void l2cap_streaming_send(struct sock *sk) |
6840ed07 | 1460 | { |
ccbb84af | 1461 | struct sk_buff *skb; |
6840ed07 | 1462 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
fcc203c3 | 1463 | u16 control, fcs; |
6840ed07 | 1464 | |
ccbb84af GP |
1465 | while ((skb = skb_dequeue(TX_QUEUE(sk)))) { |
1466 | control = get_unaligned_le16(skb->data + L2CAP_HDR_SIZE); | |
6840ed07 | 1467 | control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; |
ccbb84af | 1468 | put_unaligned_le16(control, skb->data + L2CAP_HDR_SIZE); |
6840ed07 | 1469 | |
e8235c6b | 1470 | if (pi->fcs == L2CAP_FCS_CRC16) { |
ccbb84af GP |
1471 | fcs = crc16(0, (u8 *)skb->data, skb->len - 2); |
1472 | put_unaligned_le16(fcs, skb->data + skb->len - 2); | |
fcc203c3 GP |
1473 | } |
1474 | ||
ccbb84af | 1475 | l2cap_do_send(sk, skb); |
6840ed07 GP |
1476 | |
1477 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
6840ed07 | 1478 | } |
6840ed07 GP |
1479 | } |
1480 | ||
dfc909be | 1481 | static void l2cap_retransmit_one_frame(struct sock *sk, u8 tx_seq) |
8f17154f GP |
1482 | { |
1483 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1484 | struct sk_buff *skb, *tx_skb; | |
1485 | u16 control, fcs; | |
8f17154f GP |
1486 | |
1487 | skb = skb_peek(TX_QUEUE(sk)); | |
f11d676d GP |
1488 | if (!skb) |
1489 | return; | |
8f17154f | 1490 | |
f11d676d GP |
1491 | do { |
1492 | if (bt_cb(skb)->tx_seq == tx_seq) | |
8f17154f | 1493 | break; |
8f17154f | 1494 | |
f11d676d GP |
1495 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
1496 | return; | |
8f17154f | 1497 | |
f11d676d | 1498 | } while ((skb = skb_queue_next(TX_QUEUE(sk), skb))); |
8f17154f | 1499 | |
f11d676d GP |
1500 | if (pi->remote_max_tx && |
1501 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
9b108fc0 | 1502 | l2cap_send_disconn_req(pi->conn, sk, ECONNABORTED); |
f11d676d GP |
1503 | return; |
1504 | } | |
1505 | ||
1506 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1507 | bt_cb(skb)->retries++; | |
1508 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
3cb123d1 GP |
1509 | |
1510 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { | |
1511 | control |= L2CAP_CTRL_FINAL; | |
1512 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
1513 | } | |
95ffa978 | 1514 | |
f11d676d GP |
1515 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
1516 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); | |
3cb123d1 | 1517 | |
f11d676d GP |
1518 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
1519 | ||
1520 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
1521 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1522 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1523 | } | |
1524 | ||
1525 | l2cap_do_send(sk, tx_skb); | |
8f17154f GP |
1526 | } |
1527 | ||
1c2acffb GP |
1528 | static int l2cap_ertm_send(struct sock *sk) |
1529 | { | |
1530 | struct sk_buff *skb, *tx_skb; | |
1531 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1532 | u16 control, fcs; |
9a9c6a34 | 1533 | int nsent = 0; |
1c2acffb | 1534 | |
c13ffa62 GP |
1535 | if (sk->sk_state != BT_CONNECTED) |
1536 | return -ENOTCONN; | |
e90bac06 | 1537 | |
6e2b6722 | 1538 | while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk))) { |
1c2acffb | 1539 | |
e90bac06 GP |
1540 | if (pi->remote_max_tx && |
1541 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
9b108fc0 | 1542 | l2cap_send_disconn_req(pi->conn, sk, ECONNABORTED); |
e90bac06 GP |
1543 | break; |
1544 | } | |
1545 | ||
e420aba3 AE |
1546 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
1547 | ||
e90bac06 GP |
1548 | bt_cb(skb)->retries++; |
1549 | ||
1c2acffb | 1550 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
95ffa978 GP |
1551 | control &= L2CAP_CTRL_SAR; |
1552 | ||
d5392c8f GP |
1553 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
1554 | control |= L2CAP_CTRL_FINAL; | |
1555 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
1556 | } | |
9f121a5a | 1557 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
1c2acffb GP |
1558 | | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
1559 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1560 | ||
e90bac06 | 1561 | |
e8235c6b | 1562 | if (pi->fcs == L2CAP_FCS_CRC16) { |
fcc203c3 GP |
1563 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); |
1564 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); | |
1565 | } | |
1566 | ||
9a9c6a34 GP |
1567 | l2cap_do_send(sk, tx_skb); |
1568 | ||
e90bac06 | 1569 | __mod_retrans_timer(); |
1c2acffb GP |
1570 | |
1571 | bt_cb(skb)->tx_seq = pi->next_tx_seq; | |
1572 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1573 | ||
1574 | pi->unacked_frames++; | |
d5392c8f | 1575 | pi->frames_sent++; |
1c2acffb GP |
1576 | |
1577 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1578 | sk->sk_send_head = NULL; | |
1579 | else | |
1580 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
9e917af1 GP |
1581 | |
1582 | nsent++; | |
1c2acffb GP |
1583 | } |
1584 | ||
9e917af1 GP |
1585 | return nsent; |
1586 | } | |
1587 | ||
dfc909be GP |
1588 | static int l2cap_retransmit_frames(struct sock *sk) |
1589 | { | |
1590 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1591 | int ret; | |
1592 | ||
dfc909be GP |
1593 | if (!skb_queue_empty(TX_QUEUE(sk))) |
1594 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
1595 | ||
1596 | pi->next_tx_seq = pi->expected_ack_seq; | |
1597 | ret = l2cap_ertm_send(sk); | |
dfc909be GP |
1598 | return ret; |
1599 | } | |
1600 | ||
9a9c6a34 | 1601 | static void l2cap_send_ack(struct l2cap_pinfo *pi) |
9e917af1 GP |
1602 | { |
1603 | struct sock *sk = (struct sock *)pi; | |
1604 | u16 control = 0; | |
1605 | ||
1606 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
1607 | ||
1608 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
1609 | control |= L2CAP_SUPER_RCV_NOT_READY; | |
1890d36b | 1610 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
9a9c6a34 GP |
1611 | l2cap_send_sframe(pi, control); |
1612 | return; | |
9e917af1 | 1613 | } |
dfc909be | 1614 | |
e0f66218 | 1615 | if (l2cap_ertm_send(sk) > 0) |
dfc909be GP |
1616 | return; |
1617 | ||
1618 | control |= L2CAP_SUPER_RCV_READY; | |
1619 | l2cap_send_sframe(pi, control); | |
1c2acffb GP |
1620 | } |
1621 | ||
9a9c6a34 | 1622 | static void l2cap_send_srejtail(struct sock *sk) |
99b0d4b7 GP |
1623 | { |
1624 | struct srej_list *tail; | |
1625 | u16 control; | |
1626 | ||
1627 | control = L2CAP_SUPER_SELECT_REJECT; | |
1628 | control |= L2CAP_CTRL_FINAL; | |
1629 | ||
1630 | tail = list_entry(SREJ_LIST(sk)->prev, struct srej_list, list); | |
1631 | control |= tail->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
1632 | ||
1633 | l2cap_send_sframe(l2cap_pi(sk), control); | |
99b0d4b7 GP |
1634 | } |
1635 | ||
1c2acffb GP |
1636 | static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb) |
1637 | { | |
1638 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1639 | struct sk_buff **frag; | |
1640 | int err, sent = 0; | |
1da177e4 | 1641 | |
59203a21 | 1642 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
1c2acffb | 1643 | return -EFAULT; |
1da177e4 LT |
1644 | |
1645 | sent += count; | |
1646 | len -= count; | |
1647 | ||
1648 | /* Continuation fragments (no L2CAP header) */ | |
1649 | frag = &skb_shinfo(skb)->frag_list; | |
1650 | while (len) { | |
1651 | count = min_t(unsigned int, conn->mtu, len); | |
1652 | ||
1653 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1654 | if (!*frag) | |
0175d629 | 1655 | return err; |
1c2acffb GP |
1656 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
1657 | return -EFAULT; | |
1da177e4 LT |
1658 | |
1659 | sent += count; | |
1660 | len -= count; | |
1661 | ||
1662 | frag = &(*frag)->next; | |
1663 | } | |
1da177e4 LT |
1664 | |
1665 | return sent; | |
1c2acffb | 1666 | } |
1da177e4 | 1667 | |
1c2acffb GP |
1668 | static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
1669 | { | |
1670 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1671 | struct sk_buff *skb; | |
1672 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1673 | struct l2cap_hdr *lh; | |
1674 | ||
1675 | BT_DBG("sk %p len %d", sk, (int)len); | |
1676 | ||
1677 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1678 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1679 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1680 | if (!skb) | |
0175d629 | 1681 | return ERR_PTR(err); |
1c2acffb GP |
1682 | |
1683 | /* Create L2CAP header */ | |
1684 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1685 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1686 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1687 | put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2)); | |
1688 | ||
1689 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1690 | if (unlikely(err < 0)) { | |
1691 | kfree_skb(skb); | |
1692 | return ERR_PTR(err); | |
1693 | } | |
1694 | return skb; | |
1695 | } | |
1696 | ||
1697 | static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len) | |
1698 | { | |
1699 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1700 | struct sk_buff *skb; | |
1701 | int err, count, hlen = L2CAP_HDR_SIZE; | |
1702 | struct l2cap_hdr *lh; | |
1703 | ||
1704 | BT_DBG("sk %p len %d", sk, (int)len); | |
1705 | ||
1706 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1707 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1708 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1709 | if (!skb) | |
0175d629 | 1710 | return ERR_PTR(err); |
1c2acffb GP |
1711 | |
1712 | /* Create L2CAP header */ | |
1713 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1714 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1715 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1716 | ||
1717 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1718 | if (unlikely(err < 0)) { | |
1719 | kfree_skb(skb); | |
1720 | return ERR_PTR(err); | |
1721 | } | |
1722 | return skb; | |
1723 | } | |
1724 | ||
6840ed07 | 1725 | static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
1c2acffb GP |
1726 | { |
1727 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1728 | struct sk_buff *skb; | |
1729 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1730 | struct l2cap_hdr *lh; | |
1731 | ||
1732 | BT_DBG("sk %p len %d", sk, (int)len); | |
1733 | ||
0ee0d208 GP |
1734 | if (!conn) |
1735 | return ERR_PTR(-ENOTCONN); | |
1736 | ||
c74e560c GP |
1737 | if (sdulen) |
1738 | hlen += 2; | |
1739 | ||
fcc203c3 GP |
1740 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1741 | hlen += 2; | |
1742 | ||
1c2acffb GP |
1743 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
1744 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1745 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1746 | if (!skb) | |
0175d629 | 1747 | return ERR_PTR(err); |
1c2acffb GP |
1748 | |
1749 | /* Create L2CAP header */ | |
1750 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1751 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1752 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1753 | put_unaligned_le16(control, skb_put(skb, 2)); | |
c74e560c GP |
1754 | if (sdulen) |
1755 | put_unaligned_le16(sdulen, skb_put(skb, 2)); | |
1c2acffb GP |
1756 | |
1757 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1758 | if (unlikely(err < 0)) { | |
1759 | kfree_skb(skb); | |
1760 | return ERR_PTR(err); | |
1761 | } | |
e90bac06 | 1762 | |
fcc203c3 GP |
1763 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1764 | put_unaligned_le16(0, skb_put(skb, 2)); | |
1765 | ||
e90bac06 | 1766 | bt_cb(skb)->retries = 0; |
1c2acffb | 1767 | return skb; |
1da177e4 LT |
1768 | } |
1769 | ||
c74e560c GP |
1770 | static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len) |
1771 | { | |
1772 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1773 | struct sk_buff *skb; | |
1774 | struct sk_buff_head sar_queue; | |
1775 | u16 control; | |
1776 | size_t size = 0; | |
1777 | ||
ff12fd64 | 1778 | skb_queue_head_init(&sar_queue); |
c74e560c | 1779 | control = L2CAP_SDU_START; |
1c762159 | 1780 | skb = l2cap_create_iframe_pdu(sk, msg, pi->remote_mps, control, len); |
c74e560c GP |
1781 | if (IS_ERR(skb)) |
1782 | return PTR_ERR(skb); | |
1783 | ||
1784 | __skb_queue_tail(&sar_queue, skb); | |
1c762159 GP |
1785 | len -= pi->remote_mps; |
1786 | size += pi->remote_mps; | |
c74e560c GP |
1787 | |
1788 | while (len > 0) { | |
1789 | size_t buflen; | |
1790 | ||
1c762159 | 1791 | if (len > pi->remote_mps) { |
44651b85 | 1792 | control = L2CAP_SDU_CONTINUE; |
1c762159 | 1793 | buflen = pi->remote_mps; |
c74e560c | 1794 | } else { |
44651b85 | 1795 | control = L2CAP_SDU_END; |
c74e560c GP |
1796 | buflen = len; |
1797 | } | |
1798 | ||
6840ed07 | 1799 | skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0); |
c74e560c GP |
1800 | if (IS_ERR(skb)) { |
1801 | skb_queue_purge(&sar_queue); | |
1802 | return PTR_ERR(skb); | |
1803 | } | |
1804 | ||
1805 | __skb_queue_tail(&sar_queue, skb); | |
1806 | len -= buflen; | |
1807 | size += buflen; | |
c74e560c GP |
1808 | } |
1809 | skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk)); | |
1810 | if (sk->sk_send_head == NULL) | |
1811 | sk->sk_send_head = sar_queue.next; | |
1812 | ||
1813 | return size; | |
1814 | } | |
1815 | ||
1da177e4 LT |
1816 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
1817 | { | |
1818 | struct sock *sk = sock->sk; | |
1c2acffb GP |
1819 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
1820 | struct sk_buff *skb; | |
1821 | u16 control; | |
1822 | int err; | |
1da177e4 LT |
1823 | |
1824 | BT_DBG("sock %p, sk %p", sock, sk); | |
1825 | ||
c1cbe4b7 BL |
1826 | err = sock_error(sk); |
1827 | if (err) | |
1828 | return err; | |
1da177e4 LT |
1829 | |
1830 | if (msg->msg_flags & MSG_OOB) | |
1831 | return -EOPNOTSUPP; | |
1832 | ||
1da177e4 LT |
1833 | lock_sock(sk); |
1834 | ||
1c2acffb | 1835 | if (sk->sk_state != BT_CONNECTED) { |
1da177e4 | 1836 | err = -ENOTCONN; |
1c2acffb GP |
1837 | goto done; |
1838 | } | |
1da177e4 | 1839 | |
1c2acffb GP |
1840 | /* Connectionless channel */ |
1841 | if (sk->sk_type == SOCK_DGRAM) { | |
1842 | skb = l2cap_create_connless_pdu(sk, msg, len); | |
9a9c6a34 | 1843 | if (IS_ERR(skb)) { |
477fffb0 | 1844 | err = PTR_ERR(skb); |
9a9c6a34 GP |
1845 | } else { |
1846 | l2cap_do_send(sk, skb); | |
1847 | err = len; | |
1848 | } | |
1c2acffb GP |
1849 | goto done; |
1850 | } | |
1851 | ||
1852 | switch (pi->mode) { | |
1853 | case L2CAP_MODE_BASIC: | |
c69163e9 GP |
1854 | /* Check outgoing MTU */ |
1855 | if (len > pi->omtu) { | |
f9dd11b0 | 1856 | err = -EMSGSIZE; |
c69163e9 GP |
1857 | goto done; |
1858 | } | |
1859 | ||
1c2acffb GP |
1860 | /* Create a basic PDU */ |
1861 | skb = l2cap_create_basic_pdu(sk, msg, len); | |
1862 | if (IS_ERR(skb)) { | |
1863 | err = PTR_ERR(skb); | |
1864 | goto done; | |
1865 | } | |
1866 | ||
9a9c6a34 GP |
1867 | l2cap_do_send(sk, skb); |
1868 | err = len; | |
1c2acffb GP |
1869 | break; |
1870 | ||
1871 | case L2CAP_MODE_ERTM: | |
6840ed07 | 1872 | case L2CAP_MODE_STREAMING: |
1c2acffb | 1873 | /* Entire SDU fits into one PDU */ |
1c762159 | 1874 | if (len <= pi->remote_mps) { |
1c2acffb | 1875 | control = L2CAP_SDU_UNSEGMENTED; |
6840ed07 | 1876 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
1c2acffb GP |
1877 | if (IS_ERR(skb)) { |
1878 | err = PTR_ERR(skb); | |
1879 | goto done; | |
1880 | } | |
c74e560c | 1881 | __skb_queue_tail(TX_QUEUE(sk), skb); |
dfc909be | 1882 | |
c74e560c GP |
1883 | if (sk->sk_send_head == NULL) |
1884 | sk->sk_send_head = skb; | |
dfc909be | 1885 | |
1c2acffb | 1886 | } else { |
c74e560c GP |
1887 | /* Segment SDU into multiples PDUs */ |
1888 | err = l2cap_sar_segment_sdu(sk, msg, len); | |
1889 | if (err < 0) | |
1890 | goto done; | |
1c2acffb | 1891 | } |
1c2acffb | 1892 | |
dfc909be | 1893 | if (pi->mode == L2CAP_MODE_STREAMING) { |
305682e8 | 1894 | l2cap_streaming_send(sk); |
dfc909be | 1895 | } else { |
6e2b6722 GP |
1896 | if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY && |
1897 | pi->conn_state && L2CAP_CONN_WAIT_F) { | |
1898 | err = len; | |
1899 | break; | |
1900 | } | |
6840ed07 | 1901 | err = l2cap_ertm_send(sk); |
dfc909be | 1902 | } |
6840ed07 | 1903 | |
9e917af1 | 1904 | if (err >= 0) |
1c2acffb GP |
1905 | err = len; |
1906 | break; | |
1907 | ||
1908 | default: | |
1909 | BT_DBG("bad state %1.1x", pi->mode); | |
bc766db2 | 1910 | err = -EBADFD; |
1c2acffb GP |
1911 | } |
1912 | ||
1913 | done: | |
1da177e4 LT |
1914 | release_sock(sk); |
1915 | return err; | |
1916 | } | |
1917 | ||
f66dc81f MH |
1918 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1919 | { | |
1920 | struct sock *sk = sock->sk; | |
1921 | ||
1922 | lock_sock(sk); | |
1923 | ||
1924 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1925 | struct l2cap_conn_rsp rsp; | |
e9aeb2dd GP |
1926 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
1927 | u8 buf[128]; | |
f66dc81f MH |
1928 | |
1929 | sk->sk_state = BT_CONFIG; | |
1930 | ||
1931 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1932 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1933 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1934 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1935 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1936 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1937 | ||
e9aeb2dd GP |
1938 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) { |
1939 | release_sock(sk); | |
1940 | return 0; | |
1941 | } | |
1942 | ||
1943 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
1944 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1945 | l2cap_build_conf_req(sk, buf), buf); | |
1946 | l2cap_pi(sk)->num_conf_req++; | |
1947 | ||
f66dc81f MH |
1948 | release_sock(sk); |
1949 | return 0; | |
1950 | } | |
1951 | ||
1952 | release_sock(sk); | |
1953 | ||
6fdf482b MM |
1954 | if (sock->type == SOCK_STREAM) |
1955 | return bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); | |
1956 | ||
f66dc81f MH |
1957 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); |
1958 | } | |
1959 | ||
b7058842 | 1960 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
1961 | { |
1962 | struct sock *sk = sock->sk; | |
1963 | struct l2cap_options opts; | |
f29972de | 1964 | int len, err = 0; |
1da177e4 LT |
1965 | u32 opt; |
1966 | ||
1967 | BT_DBG("sk %p", sk); | |
1968 | ||
1969 | lock_sock(sk); | |
1970 | ||
1971 | switch (optname) { | |
1972 | case L2CAP_OPTIONS: | |
eaa71b31 GP |
1973 | if (sk->sk_state == BT_CONNECTED) { |
1974 | err = -EINVAL; | |
1975 | break; | |
1976 | } | |
1977 | ||
0878b666 MH |
1978 | opts.imtu = l2cap_pi(sk)->imtu; |
1979 | opts.omtu = l2cap_pi(sk)->omtu; | |
1980 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1981 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1982 | opts.fcs = l2cap_pi(sk)->fcs; |
68d7f0ce | 1983 | opts.max_tx = l2cap_pi(sk)->max_tx; |
14b5aa71 | 1984 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
0878b666 | 1985 | |
1da177e4 LT |
1986 | len = min_t(unsigned int, sizeof(opts), optlen); |
1987 | if (copy_from_user((char *) &opts, optval, len)) { | |
1988 | err = -EFAULT; | |
1989 | break; | |
1990 | } | |
0878b666 | 1991 | |
45d65c46 GP |
1992 | if (opts.txwin_size > L2CAP_DEFAULT_TX_WINDOW) { |
1993 | err = -EINVAL; | |
1994 | break; | |
1995 | } | |
1996 | ||
0041ecfa JPRV |
1997 | l2cap_pi(sk)->mode = opts.mode; |
1998 | switch (l2cap_pi(sk)->mode) { | |
1999 | case L2CAP_MODE_BASIC: | |
85eb53c6 | 2000 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_STATE2_DEVICE; |
0041ecfa JPRV |
2001 | break; |
2002 | case L2CAP_MODE_ERTM: | |
2003 | case L2CAP_MODE_STREAMING: | |
d1c4a17d | 2004 | if (!disable_ertm) |
0041ecfa JPRV |
2005 | break; |
2006 | /* fall through */ | |
2007 | default: | |
2008 | err = -EINVAL; | |
2009 | break; | |
2010 | } | |
2011 | ||
c6b03cf9 MH |
2012 | l2cap_pi(sk)->imtu = opts.imtu; |
2013 | l2cap_pi(sk)->omtu = opts.omtu; | |
fcc203c3 | 2014 | l2cap_pi(sk)->fcs = opts.fcs; |
68d7f0ce | 2015 | l2cap_pi(sk)->max_tx = opts.max_tx; |
14b5aa71 | 2016 | l2cap_pi(sk)->tx_win = (__u8)opts.txwin_size; |
1da177e4 LT |
2017 | break; |
2018 | ||
2019 | case L2CAP_LM: | |
2020 | if (get_user(opt, (u32 __user *) optval)) { | |
2021 | err = -EFAULT; | |
2022 | break; | |
2023 | } | |
2024 | ||
2af6b9d5 MH |
2025 | if (opt & L2CAP_LM_AUTH) |
2026 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
2027 | if (opt & L2CAP_LM_ENCRYPT) | |
2028 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
2029 | if (opt & L2CAP_LM_SECURE) | |
2030 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
2031 | ||
2032 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
2033 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
2034 | break; |
2035 | ||
2036 | default: | |
2037 | err = -ENOPROTOOPT; | |
2038 | break; | |
2039 | } | |
2040 | ||
2041 | release_sock(sk); | |
2042 | return err; | |
2043 | } | |
2044 | ||
b7058842 | 2045 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
d58daf42 MH |
2046 | { |
2047 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
2048 | struct bt_security sec; |
2049 | int len, err = 0; | |
f66dc81f | 2050 | u32 opt; |
d58daf42 MH |
2051 | |
2052 | BT_DBG("sk %p", sk); | |
2053 | ||
2054 | if (level == SOL_L2CAP) | |
2055 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
2056 | ||
0588d94f MH |
2057 | if (level != SOL_BLUETOOTH) |
2058 | return -ENOPROTOOPT; | |
2059 | ||
d58daf42 MH |
2060 | lock_sock(sk); |
2061 | ||
2062 | switch (optname) { | |
2af6b9d5 | 2063 | case BT_SECURITY: |
bd3c9e25 GP |
2064 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
2065 | && sk->sk_type != SOCK_RAW) { | |
0588d94f MH |
2066 | err = -EINVAL; |
2067 | break; | |
2068 | } | |
2069 | ||
2af6b9d5 MH |
2070 | sec.level = BT_SECURITY_LOW; |
2071 | ||
2072 | len = min_t(unsigned int, sizeof(sec), optlen); | |
2073 | if (copy_from_user((char *) &sec, optval, len)) { | |
2074 | err = -EFAULT; | |
2075 | break; | |
2076 | } | |
2077 | ||
2078 | if (sec.level < BT_SECURITY_LOW || | |
2079 | sec.level > BT_SECURITY_HIGH) { | |
2080 | err = -EINVAL; | |
2081 | break; | |
2082 | } | |
2083 | ||
2084 | l2cap_pi(sk)->sec_level = sec.level; | |
2085 | break; | |
2086 | ||
f66dc81f MH |
2087 | case BT_DEFER_SETUP: |
2088 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
2089 | err = -EINVAL; | |
2090 | break; | |
2091 | } | |
2092 | ||
2093 | if (get_user(opt, (u32 __user *) optval)) { | |
2094 | err = -EFAULT; | |
2095 | break; | |
2096 | } | |
2097 | ||
2098 | bt_sk(sk)->defer_setup = opt; | |
2099 | break; | |
2100 | ||
d58daf42 MH |
2101 | default: |
2102 | err = -ENOPROTOOPT; | |
2103 | break; | |
2104 | } | |
2105 | ||
2106 | release_sock(sk); | |
2107 | return err; | |
2108 | } | |
2109 | ||
2110 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
2111 | { |
2112 | struct sock *sk = sock->sk; | |
2113 | struct l2cap_options opts; | |
2114 | struct l2cap_conninfo cinfo; | |
2115 | int len, err = 0; | |
2af6b9d5 | 2116 | u32 opt; |
1da177e4 LT |
2117 | |
2118 | BT_DBG("sk %p", sk); | |
2119 | ||
2120 | if (get_user(len, optlen)) | |
2121 | return -EFAULT; | |
2122 | ||
2123 | lock_sock(sk); | |
2124 | ||
2125 | switch (optname) { | |
2126 | case L2CAP_OPTIONS: | |
2127 | opts.imtu = l2cap_pi(sk)->imtu; | |
2128 | opts.omtu = l2cap_pi(sk)->omtu; | |
2129 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 2130 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 2131 | opts.fcs = l2cap_pi(sk)->fcs; |
68d7f0ce | 2132 | opts.max_tx = l2cap_pi(sk)->max_tx; |
14b5aa71 | 2133 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
1da177e4 LT |
2134 | |
2135 | len = min_t(unsigned int, len, sizeof(opts)); | |
2136 | if (copy_to_user(optval, (char *) &opts, len)) | |
2137 | err = -EFAULT; | |
2138 | ||
2139 | break; | |
2140 | ||
2141 | case L2CAP_LM: | |
2af6b9d5 MH |
2142 | switch (l2cap_pi(sk)->sec_level) { |
2143 | case BT_SECURITY_LOW: | |
2144 | opt = L2CAP_LM_AUTH; | |
2145 | break; | |
2146 | case BT_SECURITY_MEDIUM: | |
2147 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
2148 | break; | |
2149 | case BT_SECURITY_HIGH: | |
2150 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2151 | L2CAP_LM_SECURE; | |
2152 | break; | |
2153 | default: | |
2154 | opt = 0; | |
2155 | break; | |
2156 | } | |
2157 | ||
2158 | if (l2cap_pi(sk)->role_switch) | |
2159 | opt |= L2CAP_LM_MASTER; | |
2160 | ||
2161 | if (l2cap_pi(sk)->force_reliable) | |
2162 | opt |= L2CAP_LM_RELIABLE; | |
2163 | ||
2164 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
2165 | err = -EFAULT; |
2166 | break; | |
2167 | ||
2168 | case L2CAP_CONNINFO: | |
f66dc81f MH |
2169 | if (sk->sk_state != BT_CONNECTED && |
2170 | !(sk->sk_state == BT_CONNECT2 && | |
2171 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
2172 | err = -ENOTCONN; |
2173 | break; | |
2174 | } | |
2175 | ||
2176 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
2177 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
2178 | ||
2179 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
2180 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
2181 | err = -EFAULT; | |
2182 | ||
2183 | break; | |
2184 | ||
2185 | default: | |
2186 | err = -ENOPROTOOPT; | |
2187 | break; | |
2188 | } | |
2189 | ||
2190 | release_sock(sk); | |
2191 | return err; | |
2192 | } | |
2193 | ||
d58daf42 MH |
2194 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
2195 | { | |
2196 | struct sock *sk = sock->sk; | |
2af6b9d5 | 2197 | struct bt_security sec; |
d58daf42 MH |
2198 | int len, err = 0; |
2199 | ||
2200 | BT_DBG("sk %p", sk); | |
2201 | ||
2202 | if (level == SOL_L2CAP) | |
2203 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
2204 | ||
0588d94f MH |
2205 | if (level != SOL_BLUETOOTH) |
2206 | return -ENOPROTOOPT; | |
2207 | ||
d58daf42 MH |
2208 | if (get_user(len, optlen)) |
2209 | return -EFAULT; | |
2210 | ||
2211 | lock_sock(sk); | |
2212 | ||
2213 | switch (optname) { | |
2af6b9d5 | 2214 | case BT_SECURITY: |
bd3c9e25 GP |
2215 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
2216 | && sk->sk_type != SOCK_RAW) { | |
0588d94f MH |
2217 | err = -EINVAL; |
2218 | break; | |
2219 | } | |
2220 | ||
2af6b9d5 MH |
2221 | sec.level = l2cap_pi(sk)->sec_level; |
2222 | ||
2223 | len = min_t(unsigned int, len, sizeof(sec)); | |
2224 | if (copy_to_user(optval, (char *) &sec, len)) | |
2225 | err = -EFAULT; | |
2226 | ||
2227 | break; | |
2228 | ||
f66dc81f MH |
2229 | case BT_DEFER_SETUP: |
2230 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
2231 | err = -EINVAL; | |
2232 | break; | |
2233 | } | |
2234 | ||
2235 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
2236 | err = -EFAULT; | |
2237 | ||
2238 | break; | |
2239 | ||
d58daf42 MH |
2240 | default: |
2241 | err = -ENOPROTOOPT; | |
2242 | break; | |
2243 | } | |
2244 | ||
2245 | release_sock(sk); | |
2246 | return err; | |
2247 | } | |
2248 | ||
1da177e4 LT |
2249 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
2250 | { | |
2251 | struct sock *sk = sock->sk; | |
2252 | int err = 0; | |
2253 | ||
2254 | BT_DBG("sock %p, sk %p", sock, sk); | |
2255 | ||
2256 | if (!sk) | |
2257 | return 0; | |
2258 | ||
2259 | lock_sock(sk); | |
2260 | if (!sk->sk_shutdown) { | |
6161c038 GP |
2261 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
2262 | err = __l2cap_wait_ack(sk); | |
2263 | ||
1da177e4 LT |
2264 | sk->sk_shutdown = SHUTDOWN_MASK; |
2265 | l2cap_sock_clear_timer(sk); | |
2266 | __l2cap_sock_close(sk, 0); | |
2267 | ||
2268 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
2269 | err = bt_sock_wait_state(sk, BT_CLOSED, |
2270 | sk->sk_lingertime); | |
1da177e4 | 2271 | } |
9b108fc0 GP |
2272 | |
2273 | if (!err && sk->sk_err) | |
2274 | err = -sk->sk_err; | |
2275 | ||
1da177e4 LT |
2276 | release_sock(sk); |
2277 | return err; | |
2278 | } | |
2279 | ||
2280 | static int l2cap_sock_release(struct socket *sock) | |
2281 | { | |
2282 | struct sock *sk = sock->sk; | |
2283 | int err; | |
2284 | ||
2285 | BT_DBG("sock %p, sk %p", sock, sk); | |
2286 | ||
2287 | if (!sk) | |
2288 | return 0; | |
2289 | ||
2290 | err = l2cap_sock_shutdown(sock, 2); | |
2291 | ||
2292 | sock_orphan(sk); | |
2293 | l2cap_sock_kill(sk); | |
2294 | return err; | |
2295 | } | |
2296 | ||
1da177e4 LT |
2297 | static void l2cap_chan_ready(struct sock *sk) |
2298 | { | |
2299 | struct sock *parent = bt_sk(sk)->parent; | |
2300 | ||
2301 | BT_DBG("sk %p, parent %p", sk, parent); | |
2302 | ||
2303 | l2cap_pi(sk)->conf_state = 0; | |
2304 | l2cap_sock_clear_timer(sk); | |
2305 | ||
2306 | if (!parent) { | |
2307 | /* Outgoing channel. | |
2308 | * Wake up socket sleeping on connect. | |
2309 | */ | |
2310 | sk->sk_state = BT_CONNECTED; | |
2311 | sk->sk_state_change(sk); | |
2312 | } else { | |
2313 | /* Incoming channel. | |
2314 | * Wake up socket sleeping on accept. | |
2315 | */ | |
2316 | parent->sk_data_ready(parent, 0); | |
2317 | } | |
2318 | } | |
2319 | ||
2320 | /* Copy frame to all raw sockets on that connection */ | |
2321 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
2322 | { | |
2323 | struct l2cap_chan_list *l = &conn->chan_list; | |
2324 | struct sk_buff *nskb; | |
af05b30b | 2325 | struct sock *sk; |
1da177e4 LT |
2326 | |
2327 | BT_DBG("conn %p", conn); | |
2328 | ||
2329 | read_lock(&l->lock); | |
2330 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2331 | if (sk->sk_type != SOCK_RAW) | |
2332 | continue; | |
2333 | ||
2334 | /* Don't send frame to the socket it came from */ | |
2335 | if (skb->sk == sk) | |
2336 | continue; | |
af05b30b GP |
2337 | nskb = skb_clone(skb, GFP_ATOMIC); |
2338 | if (!nskb) | |
1da177e4 LT |
2339 | continue; |
2340 | ||
2341 | if (sock_queue_rcv_skb(sk, nskb)) | |
2342 | kfree_skb(nskb); | |
2343 | } | |
2344 | read_unlock(&l->lock); | |
2345 | } | |
2346 | ||
2347 | /* ---- L2CAP signalling commands ---- */ | |
2348 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
2349 | u8 code, u8 ident, u16 dlen, void *data) | |
2350 | { | |
2351 | struct sk_buff *skb, **frag; | |
2352 | struct l2cap_cmd_hdr *cmd; | |
2353 | struct l2cap_hdr *lh; | |
2354 | int len, count; | |
2355 | ||
af05b30b GP |
2356 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
2357 | conn, code, ident, dlen); | |
1da177e4 LT |
2358 | |
2359 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
2360 | count = min_t(unsigned int, conn->mtu, len); | |
2361 | ||
2362 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
2363 | if (!skb) | |
2364 | return NULL; | |
2365 | ||
2366 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c | 2367 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
8db4dc46 | 2368 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
1da177e4 LT |
2369 | |
2370 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
2371 | cmd->code = code; | |
2372 | cmd->ident = ident; | |
aca3192c | 2373 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
2374 | |
2375 | if (dlen) { | |
2376 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
2377 | memcpy(skb_put(skb, count), data, count); | |
2378 | data += count; | |
2379 | } | |
2380 | ||
2381 | len -= skb->len; | |
2382 | ||
2383 | /* Continuation fragments (no L2CAP header) */ | |
2384 | frag = &skb_shinfo(skb)->frag_list; | |
2385 | while (len) { | |
2386 | count = min_t(unsigned int, conn->mtu, len); | |
2387 | ||
2388 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
2389 | if (!*frag) | |
2390 | goto fail; | |
2391 | ||
2392 | memcpy(skb_put(*frag, count), data, count); | |
2393 | ||
2394 | len -= count; | |
2395 | data += count; | |
2396 | ||
2397 | frag = &(*frag)->next; | |
2398 | } | |
2399 | ||
2400 | return skb; | |
2401 | ||
2402 | fail: | |
2403 | kfree_skb(skb); | |
2404 | return NULL; | |
2405 | } | |
2406 | ||
2407 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
2408 | { | |
2409 | struct l2cap_conf_opt *opt = *ptr; | |
2410 | int len; | |
2411 | ||
2412 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
2413 | *ptr += len; | |
2414 | ||
2415 | *type = opt->type; | |
2416 | *olen = opt->len; | |
2417 | ||
2418 | switch (opt->len) { | |
2419 | case 1: | |
2420 | *val = *((u8 *) opt->val); | |
2421 | break; | |
2422 | ||
2423 | case 2: | |
861d6882 | 2424 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
2425 | break; |
2426 | ||
2427 | case 4: | |
861d6882 | 2428 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
2429 | break; |
2430 | ||
2431 | default: | |
2432 | *val = (unsigned long) opt->val; | |
2433 | break; | |
2434 | } | |
2435 | ||
2436 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
2437 | return len; | |
2438 | } | |
2439 | ||
1da177e4 LT |
2440 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
2441 | { | |
2442 | struct l2cap_conf_opt *opt = *ptr; | |
2443 | ||
2444 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
2445 | ||
2446 | opt->type = type; | |
2447 | opt->len = len; | |
2448 | ||
2449 | switch (len) { | |
2450 | case 1: | |
2451 | *((u8 *) opt->val) = val; | |
2452 | break; | |
2453 | ||
2454 | case 2: | |
8e036fc3 | 2455 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
2456 | break; |
2457 | ||
2458 | case 4: | |
8e036fc3 | 2459 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
2460 | break; |
2461 | ||
2462 | default: | |
2463 | memcpy(opt->val, (void *) val, len); | |
2464 | break; | |
2465 | } | |
2466 | ||
2467 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
2468 | } | |
2469 | ||
c1b4f43b GP |
2470 | static void l2cap_ack_timeout(unsigned long arg) |
2471 | { | |
2472 | struct sock *sk = (void *) arg; | |
2473 | ||
2474 | bh_lock_sock(sk); | |
2475 | l2cap_send_ack(l2cap_pi(sk)); | |
2476 | bh_unlock_sock(sk); | |
2477 | } | |
2478 | ||
0565c1c2 GP |
2479 | static inline void l2cap_ertm_init(struct sock *sk) |
2480 | { | |
2481 | l2cap_pi(sk)->expected_ack_seq = 0; | |
2482 | l2cap_pi(sk)->unacked_frames = 0; | |
2483 | l2cap_pi(sk)->buffer_seq = 0; | |
803020c6 | 2484 | l2cap_pi(sk)->num_acked = 0; |
d5392c8f | 2485 | l2cap_pi(sk)->frames_sent = 0; |
0565c1c2 GP |
2486 | |
2487 | setup_timer(&l2cap_pi(sk)->retrans_timer, | |
2488 | l2cap_retrans_timeout, (unsigned long) sk); | |
2489 | setup_timer(&l2cap_pi(sk)->monitor_timer, | |
2490 | l2cap_monitor_timeout, (unsigned long) sk); | |
c1b4f43b GP |
2491 | setup_timer(&l2cap_pi(sk)->ack_timer, |
2492 | l2cap_ack_timeout, (unsigned long) sk); | |
0565c1c2 GP |
2493 | |
2494 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b GP |
2495 | __skb_queue_head_init(BUSY_QUEUE(sk)); |
2496 | ||
2497 | INIT_WORK(&l2cap_pi(sk)->busy_work, l2cap_busy_work); | |
218bb9df GP |
2498 | |
2499 | sk->sk_backlog_rcv = l2cap_ertm_data_rcv; | |
0565c1c2 GP |
2500 | } |
2501 | ||
f2fcfcd6 GP |
2502 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
2503 | { | |
2504 | switch (mode) { | |
2505 | case L2CAP_MODE_STREAMING: | |
2506 | case L2CAP_MODE_ERTM: | |
2507 | if (l2cap_mode_supported(mode, remote_feat_mask)) | |
2508 | return mode; | |
2509 | /* fall through */ | |
2510 | default: | |
2511 | return L2CAP_MODE_BASIC; | |
2512 | } | |
2513 | } | |
2514 | ||
1da177e4 LT |
2515 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
2516 | { | |
2517 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2518 | struct l2cap_conf_req *req = data; | |
bd3c9e25 | 2519 | struct l2cap_conf_rfc rfc = { .mode = pi->mode }; |
1da177e4 LT |
2520 | void *ptr = req->data; |
2521 | ||
2522 | BT_DBG("sk %p", sk); | |
2523 | ||
f2fcfcd6 GP |
2524 | if (pi->num_conf_req || pi->num_conf_rsp) |
2525 | goto done; | |
2526 | ||
2527 | switch (pi->mode) { | |
2528 | case L2CAP_MODE_STREAMING: | |
2529 | case L2CAP_MODE_ERTM: | |
2ba13ed6 | 2530 | if (pi->conf_state & L2CAP_CONF_STATE2_DEVICE) |
85eb53c6 | 2531 | break; |
85eb53c6 | 2532 | |
2ba13ed6 | 2533 | /* fall through */ |
f2fcfcd6 GP |
2534 | default: |
2535 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2536 | break; | |
2537 | } | |
2538 | ||
2539 | done: | |
65c7c491 MH |
2540 | switch (pi->mode) { |
2541 | case L2CAP_MODE_BASIC: | |
2542 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
2543 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
62547752 | 2544 | |
63406504 GP |
2545 | if (!(pi->conn->feat_mask & L2CAP_FEAT_ERTM) && |
2546 | !(pi->conn->feat_mask & L2CAP_FEAT_STREAMING)) | |
2547 | break; | |
2548 | ||
62547752 GP |
2549 | rfc.mode = L2CAP_MODE_BASIC; |
2550 | rfc.txwin_size = 0; | |
2551 | rfc.max_transmit = 0; | |
2552 | rfc.retrans_timeout = 0; | |
2553 | rfc.monitor_timeout = 0; | |
2554 | rfc.max_pdu_size = 0; | |
2555 | ||
63406504 GP |
2556 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
2557 | (unsigned long) &rfc); | |
65c7c491 MH |
2558 | break; |
2559 | ||
2560 | case L2CAP_MODE_ERTM: | |
2561 | rfc.mode = L2CAP_MODE_ERTM; | |
14b5aa71 | 2562 | rfc.txwin_size = pi->tx_win; |
68d7f0ce | 2563 | rfc.max_transmit = pi->max_tx; |
f2fcfcd6 GP |
2564 | rfc.retrans_timeout = 0; |
2565 | rfc.monitor_timeout = 0; | |
c74e560c | 2566 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
d1daa091 | 2567 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
1c762159 | 2568 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
f2fcfcd6 | 2569 | |
63406504 GP |
2570 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
2571 | (unsigned long) &rfc); | |
2572 | ||
fcc203c3 GP |
2573 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
2574 | break; | |
2575 | ||
2576 | if (pi->fcs == L2CAP_FCS_NONE || | |
2577 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2578 | pi->fcs = L2CAP_FCS_NONE; | |
2579 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2580 | } | |
f2fcfcd6 GP |
2581 | break; |
2582 | ||
2583 | case L2CAP_MODE_STREAMING: | |
2584 | rfc.mode = L2CAP_MODE_STREAMING; | |
2585 | rfc.txwin_size = 0; | |
2586 | rfc.max_transmit = 0; | |
2587 | rfc.retrans_timeout = 0; | |
2588 | rfc.monitor_timeout = 0; | |
c74e560c | 2589 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
d1daa091 | 2590 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
1c762159 | 2591 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
65c7c491 | 2592 | |
63406504 GP |
2593 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
2594 | (unsigned long) &rfc); | |
2595 | ||
fcc203c3 GP |
2596 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
2597 | break; | |
2598 | ||
2599 | if (pi->fcs == L2CAP_FCS_NONE || | |
2600 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2601 | pi->fcs = L2CAP_FCS_NONE; | |
2602 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2603 | } | |
65c7c491 MH |
2604 | break; |
2605 | } | |
1da177e4 LT |
2606 | |
2607 | /* FIXME: Need actual value of the flush timeout */ | |
2608 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
2609 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
2610 | ||
aca3192c YH |
2611 | req->dcid = cpu_to_le16(pi->dcid); |
2612 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
2613 | |
2614 | return ptr - data; | |
2615 | } | |
2616 | ||
5dee9e7c | 2617 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
2618 | { |
2619 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
2620 | struct l2cap_conf_rsp *rsp = data; |
2621 | void *ptr = rsp->data; | |
2622 | void *req = pi->conf_req; | |
2623 | int len = pi->conf_len; | |
2624 | int type, hint, olen; | |
2625 | unsigned long val; | |
6464f35f | 2626 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 2627 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 2628 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 2629 | |
5dee9e7c | 2630 | BT_DBG("sk %p", sk); |
820ae1b8 | 2631 | |
5dee9e7c MH |
2632 | while (len >= L2CAP_CONF_OPT_SIZE) { |
2633 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 2634 | |
589d2746 | 2635 | hint = type & L2CAP_CONF_HINT; |
47ec1dcd | 2636 | type &= L2CAP_CONF_MASK; |
5dee9e7c MH |
2637 | |
2638 | switch (type) { | |
2639 | case L2CAP_CONF_MTU: | |
861d6882 | 2640 | mtu = val; |
5dee9e7c MH |
2641 | break; |
2642 | ||
2643 | case L2CAP_CONF_FLUSH_TO: | |
2644 | pi->flush_to = val; | |
2645 | break; | |
2646 | ||
2647 | case L2CAP_CONF_QOS: | |
2648 | break; | |
2649 | ||
6464f35f MH |
2650 | case L2CAP_CONF_RFC: |
2651 | if (olen == sizeof(rfc)) | |
2652 | memcpy(&rfc, (void *) val, olen); | |
2653 | break; | |
2654 | ||
fcc203c3 GP |
2655 | case L2CAP_CONF_FCS: |
2656 | if (val == L2CAP_FCS_NONE) | |
2657 | pi->conf_state |= L2CAP_CONF_NO_FCS_RECV; | |
2658 | ||
2659 | break; | |
2660 | ||
5dee9e7c MH |
2661 | default: |
2662 | if (hint) | |
2663 | break; | |
2664 | ||
2665 | result = L2CAP_CONF_UNKNOWN; | |
2666 | *((u8 *) ptr++) = type; | |
2667 | break; | |
2668 | } | |
2669 | } | |
2670 | ||
e9aeb2dd | 2671 | if (pi->num_conf_rsp || pi->num_conf_req > 1) |
f2fcfcd6 GP |
2672 | goto done; |
2673 | ||
2674 | switch (pi->mode) { | |
2675 | case L2CAP_MODE_STREAMING: | |
2676 | case L2CAP_MODE_ERTM: | |
85eb53c6 GP |
2677 | if (!(pi->conf_state & L2CAP_CONF_STATE2_DEVICE)) { |
2678 | pi->mode = l2cap_select_mode(rfc.mode, | |
2679 | pi->conn->feat_mask); | |
2680 | break; | |
2681 | } | |
2682 | ||
742e519b | 2683 | if (pi->mode != rfc.mode) |
f2fcfcd6 | 2684 | return -ECONNREFUSED; |
742e519b | 2685 | |
f2fcfcd6 | 2686 | break; |
f2fcfcd6 GP |
2687 | } |
2688 | ||
2689 | done: | |
2690 | if (pi->mode != rfc.mode) { | |
2691 | result = L2CAP_CONF_UNACCEPT; | |
2692 | rfc.mode = pi->mode; | |
2693 | ||
2694 | if (pi->num_conf_rsp == 1) | |
2695 | return -ECONNREFUSED; | |
2696 | ||
2697 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2698 | sizeof(rfc), (unsigned long) &rfc); | |
2699 | } | |
2700 | ||
2701 | ||
5dee9e7c MH |
2702 | if (result == L2CAP_CONF_SUCCESS) { |
2703 | /* Configure output options and let the other side know | |
2704 | * which ones we don't like. */ | |
2705 | ||
f2fcfcd6 GP |
2706 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
2707 | result = L2CAP_CONF_UNACCEPT; | |
2708 | else { | |
2709 | pi->omtu = mtu; | |
2710 | pi->conf_state |= L2CAP_CONF_MTU_DONE; | |
2711 | } | |
2712 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
6464f35f | 2713 | |
f2fcfcd6 GP |
2714 | switch (rfc.mode) { |
2715 | case L2CAP_MODE_BASIC: | |
2716 | pi->fcs = L2CAP_FCS_NONE; | |
2717 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
2718 | break; | |
2719 | ||
2720 | case L2CAP_MODE_ERTM: | |
2721 | pi->remote_tx_win = rfc.txwin_size; | |
2722 | pi->remote_max_tx = rfc.max_transmit; | |
86b1b263 MM |
2723 | |
2724 | if (le16_to_cpu(rfc.max_pdu_size) > pi->conn->mtu - 10) | |
2725 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); | |
1c762159 GP |
2726 | |
2727 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); | |
f2fcfcd6 | 2728 | |
10467e9e GP |
2729 | rfc.retrans_timeout = |
2730 | le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO); | |
2731 | rfc.monitor_timeout = | |
2732 | le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO); | |
f2fcfcd6 GP |
2733 | |
2734 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2735 | |
2736 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2737 | sizeof(rfc), (unsigned long) &rfc); | |
2738 | ||
f2fcfcd6 GP |
2739 | break; |
2740 | ||
2741 | case L2CAP_MODE_STREAMING: | |
86b1b263 MM |
2742 | if (le16_to_cpu(rfc.max_pdu_size) > pi->conn->mtu - 10) |
2743 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); | |
1c762159 GP |
2744 | |
2745 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); | |
f2fcfcd6 GP |
2746 | |
2747 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2748 | |
2749 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2750 | sizeof(rfc), (unsigned long) &rfc); | |
2751 | ||
f2fcfcd6 GP |
2752 | break; |
2753 | ||
2754 | default: | |
5dee9e7c | 2755 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 2756 | |
6464f35f | 2757 | memset(&rfc, 0, sizeof(rfc)); |
f2fcfcd6 GP |
2758 | rfc.mode = pi->mode; |
2759 | } | |
6464f35f | 2760 | |
f2fcfcd6 GP |
2761 | if (result == L2CAP_CONF_SUCCESS) |
2762 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
2763 | } | |
5dee9e7c MH |
2764 | rsp->scid = cpu_to_le16(pi->dcid); |
2765 | rsp->result = cpu_to_le16(result); | |
2766 | rsp->flags = cpu_to_le16(0x0000); | |
2767 | ||
2768 | return ptr - data; | |
1da177e4 LT |
2769 | } |
2770 | ||
f2fcfcd6 GP |
2771 | static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result) |
2772 | { | |
2773 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2774 | struct l2cap_conf_req *req = data; | |
2775 | void *ptr = req->data; | |
2776 | int type, olen; | |
2777 | unsigned long val; | |
2778 | struct l2cap_conf_rfc rfc; | |
2779 | ||
2780 | BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data); | |
2781 | ||
2782 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2783 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2784 | ||
2785 | switch (type) { | |
2786 | case L2CAP_CONF_MTU: | |
2787 | if (val < L2CAP_DEFAULT_MIN_MTU) { | |
2788 | *result = L2CAP_CONF_UNACCEPT; | |
8183b775 | 2789 | pi->imtu = L2CAP_DEFAULT_MIN_MTU; |
f2fcfcd6 | 2790 | } else |
8183b775 AE |
2791 | pi->imtu = val; |
2792 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
f2fcfcd6 GP |
2793 | break; |
2794 | ||
2795 | case L2CAP_CONF_FLUSH_TO: | |
2796 | pi->flush_to = val; | |
2797 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, | |
2798 | 2, pi->flush_to); | |
2799 | break; | |
2800 | ||
2801 | case L2CAP_CONF_RFC: | |
2802 | if (olen == sizeof(rfc)) | |
2803 | memcpy(&rfc, (void *)val, olen); | |
2804 | ||
2805 | if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) && | |
2806 | rfc.mode != pi->mode) | |
2807 | return -ECONNREFUSED; | |
2808 | ||
f2fcfcd6 GP |
2809 | pi->fcs = 0; |
2810 | ||
2811 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2812 | sizeof(rfc), (unsigned long) &rfc); | |
2813 | break; | |
2814 | } | |
2815 | } | |
2816 | ||
6c2ea7a8 GP |
2817 | if (pi->mode == L2CAP_MODE_BASIC && pi->mode != rfc.mode) |
2818 | return -ECONNREFUSED; | |
2819 | ||
2820 | pi->mode = rfc.mode; | |
2821 | ||
f2fcfcd6 GP |
2822 | if (*result == L2CAP_CONF_SUCCESS) { |
2823 | switch (rfc.mode) { | |
2824 | case L2CAP_MODE_ERTM: | |
10467e9e GP |
2825 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
2826 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); | |
1c762159 | 2827 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
f2fcfcd6 GP |
2828 | break; |
2829 | case L2CAP_MODE_STREAMING: | |
1c762159 | 2830 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
f2fcfcd6 GP |
2831 | } |
2832 | } | |
2833 | ||
2834 | req->dcid = cpu_to_le16(pi->dcid); | |
2835 | req->flags = cpu_to_le16(0x0000); | |
2836 | ||
2837 | return ptr - data; | |
2838 | } | |
2839 | ||
5dee9e7c | 2840 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
2841 | { |
2842 | struct l2cap_conf_rsp *rsp = data; | |
2843 | void *ptr = rsp->data; | |
1da177e4 | 2844 | |
5dee9e7c | 2845 | BT_DBG("sk %p", sk); |
1da177e4 | 2846 | |
aca3192c | 2847 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 2848 | rsp->result = cpu_to_le16(result); |
aca3192c | 2849 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
2850 | |
2851 | return ptr - data; | |
2852 | } | |
2853 | ||
7b1c0049 GP |
2854 | static void l2cap_conf_rfc_get(struct sock *sk, void *rsp, int len) |
2855 | { | |
2856 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2857 | int type, olen; | |
2858 | unsigned long val; | |
2859 | struct l2cap_conf_rfc rfc; | |
2860 | ||
2861 | BT_DBG("sk %p, rsp %p, len %d", sk, rsp, len); | |
2862 | ||
2863 | if ((pi->mode != L2CAP_MODE_ERTM) && (pi->mode != L2CAP_MODE_STREAMING)) | |
2864 | return; | |
2865 | ||
2866 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2867 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2868 | ||
2869 | switch (type) { | |
2870 | case L2CAP_CONF_RFC: | |
2871 | if (olen == sizeof(rfc)) | |
2872 | memcpy(&rfc, (void *)val, olen); | |
2873 | goto done; | |
2874 | } | |
2875 | } | |
2876 | ||
2877 | done: | |
2878 | switch (rfc.mode) { | |
2879 | case L2CAP_MODE_ERTM: | |
10467e9e GP |
2880 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
2881 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); | |
7b1c0049 GP |
2882 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
2883 | break; | |
2884 | case L2CAP_MODE_STREAMING: | |
2885 | pi->mps = le16_to_cpu(rfc.max_pdu_size); | |
2886 | } | |
2887 | } | |
2888 | ||
4e8402a3 MH |
2889 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2890 | { | |
2891 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
2892 | ||
2893 | if (rej->reason != 0x0000) | |
2894 | return 0; | |
2895 | ||
2896 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
2897 | cmd->ident == conn->info_ident) { | |
4e8402a3 | 2898 | del_timer(&conn->info_timer); |
984947dc MH |
2899 | |
2900 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
e1027a7c | 2901 | conn->info_ident = 0; |
984947dc | 2902 | |
4e8402a3 MH |
2903 | l2cap_conn_start(conn); |
2904 | } | |
2905 | ||
2906 | return 0; | |
2907 | } | |
2908 | ||
1da177e4 LT |
2909 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2910 | { | |
2911 | struct l2cap_chan_list *list = &conn->chan_list; | |
2912 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
2913 | struct l2cap_conn_rsp rsp; | |
d793fe8c | 2914 | struct sock *parent, *sk = NULL; |
e7c29cb1 | 2915 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
2916 | |
2917 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 2918 | __le16 psm = req->psm; |
1da177e4 LT |
2919 | |
2920 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
2921 | ||
2922 | /* Check if we have socket listening on psm */ | |
2923 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
2924 | if (!parent) { | |
2925 | result = L2CAP_CR_BAD_PSM; | |
2926 | goto sendresp; | |
2927 | } | |
2928 | ||
e7c29cb1 MH |
2929 | /* Check if the ACL is secure enough (if not SDP) */ |
2930 | if (psm != cpu_to_le16(0x0001) && | |
2931 | !hci_conn_check_link_mode(conn->hcon)) { | |
2950f21a | 2932 | conn->disc_reason = 0x05; |
e7c29cb1 MH |
2933 | result = L2CAP_CR_SEC_BLOCK; |
2934 | goto response; | |
2935 | } | |
2936 | ||
1da177e4 LT |
2937 | result = L2CAP_CR_NO_MEM; |
2938 | ||
2939 | /* Check for backlog size */ | |
2940 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 2941 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
2942 | goto response; |
2943 | } | |
2944 | ||
3b1e0a65 | 2945 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
2946 | if (!sk) |
2947 | goto response; | |
2948 | ||
fd1278d7 | 2949 | write_lock_bh(&list->lock); |
1da177e4 LT |
2950 | |
2951 | /* Check if we already have channel with that dcid */ | |
2952 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 2953 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2954 | sock_set_flag(sk, SOCK_ZAPPED); |
2955 | l2cap_sock_kill(sk); | |
2956 | goto response; | |
2957 | } | |
2958 | ||
2959 | hci_conn_hold(conn->hcon); | |
2960 | ||
2961 | l2cap_sock_init(sk, parent); | |
2962 | bacpy(&bt_sk(sk)->src, conn->src); | |
2963 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
2964 | l2cap_pi(sk)->psm = psm; | |
2965 | l2cap_pi(sk)->dcid = scid; | |
2966 | ||
2967 | __l2cap_chan_add(conn, sk, parent); | |
2968 | dcid = l2cap_pi(sk)->scid; | |
2969 | ||
2970 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
2971 | ||
1da177e4 LT |
2972 | l2cap_pi(sk)->ident = cmd->ident; |
2973 | ||
984947dc | 2974 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
2af6b9d5 | 2975 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
2976 | if (bt_sk(sk)->defer_setup) { |
2977 | sk->sk_state = BT_CONNECT2; | |
2978 | result = L2CAP_CR_PEND; | |
2979 | status = L2CAP_CS_AUTHOR_PEND; | |
2980 | parent->sk_data_ready(parent, 0); | |
2981 | } else { | |
2982 | sk->sk_state = BT_CONFIG; | |
2983 | result = L2CAP_CR_SUCCESS; | |
2984 | status = L2CAP_CS_NO_INFO; | |
2985 | } | |
79d554a6 MH |
2986 | } else { |
2987 | sk->sk_state = BT_CONNECT2; | |
2988 | result = L2CAP_CR_PEND; | |
2989 | status = L2CAP_CS_AUTHEN_PEND; | |
2990 | } | |
2991 | } else { | |
2992 | sk->sk_state = BT_CONNECT2; | |
2993 | result = L2CAP_CR_PEND; | |
2994 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
2995 | } |
2996 | ||
fd1278d7 | 2997 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2998 | |
2999 | response: | |
3000 | bh_unlock_sock(parent); | |
3001 | ||
3002 | sendresp: | |
aca3192c YH |
3003 | rsp.scid = cpu_to_le16(scid); |
3004 | rsp.dcid = cpu_to_le16(dcid); | |
3005 | rsp.result = cpu_to_le16(result); | |
3006 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 3007 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
3008 | |
3009 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
3010 | struct l2cap_info_req info; | |
3011 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
3012 | ||
3013 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
3014 | conn->info_ident = l2cap_get_ident(conn); | |
3015 | ||
3016 | mod_timer(&conn->info_timer, jiffies + | |
3017 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
3018 | ||
3019 | l2cap_send_cmd(conn, conn->info_ident, | |
3020 | L2CAP_INFO_REQ, sizeof(info), &info); | |
3021 | } | |
3022 | ||
d793fe8c | 3023 | if (sk && !(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) && |
e9aeb2dd GP |
3024 | result == L2CAP_CR_SUCCESS) { |
3025 | u8 buf[128]; | |
3026 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
3027 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
3028 | l2cap_build_conf_req(sk, buf), buf); | |
3029 | l2cap_pi(sk)->num_conf_req++; | |
3030 | } | |
3031 | ||
1da177e4 LT |
3032 | return 0; |
3033 | } | |
3034 | ||
3035 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3036 | { | |
3037 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
3038 | u16 scid, dcid, result, status; | |
3039 | struct sock *sk; | |
3040 | u8 req[128]; | |
3041 | ||
3042 | scid = __le16_to_cpu(rsp->scid); | |
3043 | dcid = __le16_to_cpu(rsp->dcid); | |
3044 | result = __le16_to_cpu(rsp->result); | |
3045 | status = __le16_to_cpu(rsp->status); | |
3046 | ||
3047 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
3048 | ||
3049 | if (scid) { | |
af05b30b GP |
3050 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
3051 | if (!sk) | |
57d3b22b | 3052 | return -EFAULT; |
1da177e4 | 3053 | } else { |
af05b30b GP |
3054 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
3055 | if (!sk) | |
57d3b22b | 3056 | return -EFAULT; |
1da177e4 LT |
3057 | } |
3058 | ||
3059 | switch (result) { | |
3060 | case L2CAP_CR_SUCCESS: | |
3061 | sk->sk_state = BT_CONFIG; | |
3062 | l2cap_pi(sk)->ident = 0; | |
3063 | l2cap_pi(sk)->dcid = dcid; | |
6a8d3010 MH |
3064 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
3065 | ||
e9aeb2dd GP |
3066 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) |
3067 | break; | |
3068 | ||
3069 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
3070 | ||
1da177e4 LT |
3071 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
3072 | l2cap_build_conf_req(sk, req), req); | |
f2fcfcd6 | 3073 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
3074 | break; |
3075 | ||
3076 | case L2CAP_CR_PEND: | |
6a8d3010 | 3077 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 LT |
3078 | break; |
3079 | ||
3080 | default: | |
3081 | l2cap_chan_del(sk, ECONNREFUSED); | |
3082 | break; | |
3083 | } | |
3084 | ||
3085 | bh_unlock_sock(sk); | |
3086 | return 0; | |
3087 | } | |
3088 | ||
8c462b60 MM |
3089 | static inline void set_default_fcs(struct l2cap_pinfo *pi) |
3090 | { | |
3091 | /* FCS is enabled only in ERTM or streaming mode, if one or both | |
3092 | * sides request it. | |
3093 | */ | |
3094 | if (pi->mode != L2CAP_MODE_ERTM && pi->mode != L2CAP_MODE_STREAMING) | |
3095 | pi->fcs = L2CAP_FCS_NONE; | |
3096 | else if (!(pi->conf_state & L2CAP_CONF_NO_FCS_RECV)) | |
3097 | pi->fcs = L2CAP_FCS_CRC16; | |
3098 | } | |
3099 | ||
88219a0f | 3100 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
3101 | { |
3102 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
3103 | u16 dcid, flags; | |
3104 | u8 rsp[64]; | |
3105 | struct sock *sk; | |
5dee9e7c | 3106 | int len; |
1da177e4 LT |
3107 | |
3108 | dcid = __le16_to_cpu(req->dcid); | |
3109 | flags = __le16_to_cpu(req->flags); | |
3110 | ||
3111 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
3112 | ||
af05b30b GP |
3113 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
3114 | if (!sk) | |
1da177e4 LT |
3115 | return -ENOENT; |
3116 | ||
b0239c80 | 3117 | if (sk->sk_state == BT_DISCONN) |
354f60a9 MH |
3118 | goto unlock; |
3119 | ||
5dee9e7c | 3120 | /* Reject if config buffer is too small. */ |
88219a0f | 3121 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
3122 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
3123 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
3124 | l2cap_build_conf_rsp(sk, rsp, | |
3125 | L2CAP_CONF_REJECT, flags), rsp); | |
3126 | goto unlock; | |
3127 | } | |
3128 | ||
3129 | /* Store config. */ | |
3130 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
3131 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
3132 | |
3133 | if (flags & 0x0001) { | |
3134 | /* Incomplete config. Send empty response. */ | |
3135 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
3136 | l2cap_build_conf_rsp(sk, rsp, |
3137 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
3138 | goto unlock; |
3139 | } | |
3140 | ||
3141 | /* Complete config. */ | |
5dee9e7c | 3142 | len = l2cap_parse_conf_req(sk, rsp); |
f2fcfcd6 | 3143 | if (len < 0) { |
9b108fc0 | 3144 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
1da177e4 | 3145 | goto unlock; |
f2fcfcd6 | 3146 | } |
1da177e4 | 3147 | |
5dee9e7c | 3148 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
f2fcfcd6 | 3149 | l2cap_pi(sk)->num_conf_rsp++; |
5dee9e7c | 3150 | |
5dee9e7c MH |
3151 | /* Reset config buffer. */ |
3152 | l2cap_pi(sk)->conf_len = 0; | |
3153 | ||
876d9484 MH |
3154 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
3155 | goto unlock; | |
3156 | ||
1da177e4 | 3157 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
8c462b60 | 3158 | set_default_fcs(l2cap_pi(sk)); |
fcc203c3 | 3159 | |
1da177e4 | 3160 | sk->sk_state = BT_CONNECTED; |
e90bac06 | 3161 | |
0565c1c2 GP |
3162 | l2cap_pi(sk)->next_tx_seq = 0; |
3163 | l2cap_pi(sk)->expected_tx_seq = 0; | |
1c2acffb | 3164 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
3165 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
3166 | l2cap_ertm_init(sk); | |
3167 | ||
1da177e4 | 3168 | l2cap_chan_ready(sk); |
876d9484 MH |
3169 | goto unlock; |
3170 | } | |
3171 | ||
3172 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 3173 | u8 buf[64]; |
ab3e5715 | 3174 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; |
1da177e4 | 3175 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 3176 | l2cap_build_conf_req(sk, buf), buf); |
f2fcfcd6 | 3177 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
3178 | } |
3179 | ||
3180 | unlock: | |
3181 | bh_unlock_sock(sk); | |
3182 | return 0; | |
3183 | } | |
3184 | ||
3185 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3186 | { | |
3187 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
3188 | u16 scid, flags, result; | |
3189 | struct sock *sk; | |
7b1c0049 | 3190 | int len = cmd->len - sizeof(*rsp); |
1da177e4 LT |
3191 | |
3192 | scid = __le16_to_cpu(rsp->scid); | |
3193 | flags = __le16_to_cpu(rsp->flags); | |
3194 | result = __le16_to_cpu(rsp->result); | |
3195 | ||
af05b30b GP |
3196 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
3197 | scid, flags, result); | |
1da177e4 | 3198 | |
af05b30b GP |
3199 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
3200 | if (!sk) | |
1da177e4 LT |
3201 | return 0; |
3202 | ||
3203 | switch (result) { | |
3204 | case L2CAP_CONF_SUCCESS: | |
7b1c0049 | 3205 | l2cap_conf_rfc_get(sk, rsp->data, len); |
1da177e4 LT |
3206 | break; |
3207 | ||
3208 | case L2CAP_CONF_UNACCEPT: | |
f2fcfcd6 | 3209 | if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
f2fcfcd6 GP |
3210 | char req[64]; |
3211 | ||
c2c77ec8 | 3212 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
9b108fc0 | 3213 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
c2c77ec8 AE |
3214 | goto done; |
3215 | } | |
3216 | ||
f2fcfcd6 GP |
3217 | /* throw out any old stored conf requests */ |
3218 | result = L2CAP_CONF_SUCCESS; | |
3219 | len = l2cap_parse_conf_rsp(sk, rsp->data, | |
3220 | len, req, &result); | |
3221 | if (len < 0) { | |
9b108fc0 | 3222 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
f2fcfcd6 GP |
3223 | goto done; |
3224 | } | |
3225 | ||
3226 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
3227 | L2CAP_CONF_REQ, len, req); | |
3228 | l2cap_pi(sk)->num_conf_req++; | |
3229 | if (result != L2CAP_CONF_SUCCESS) | |
3230 | goto done; | |
3231 | break; | |
1da177e4 LT |
3232 | } |
3233 | ||
8e87d142 | 3234 | default: |
b1235d79 | 3235 | sk->sk_err = ECONNRESET; |
1da177e4 | 3236 | l2cap_sock_set_timer(sk, HZ * 5); |
9b108fc0 | 3237 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
1da177e4 LT |
3238 | goto done; |
3239 | } | |
3240 | ||
3241 | if (flags & 0x01) | |
3242 | goto done; | |
3243 | ||
1da177e4 LT |
3244 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
3245 | ||
3246 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
8c462b60 | 3247 | set_default_fcs(l2cap_pi(sk)); |
fcc203c3 | 3248 | |
1da177e4 | 3249 | sk->sk_state = BT_CONNECTED; |
0565c1c2 | 3250 | l2cap_pi(sk)->next_tx_seq = 0; |
1c2acffb | 3251 | l2cap_pi(sk)->expected_tx_seq = 0; |
1c2acffb | 3252 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
3253 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
3254 | l2cap_ertm_init(sk); | |
3255 | ||
1da177e4 LT |
3256 | l2cap_chan_ready(sk); |
3257 | } | |
3258 | ||
3259 | done: | |
3260 | bh_unlock_sock(sk); | |
3261 | return 0; | |
3262 | } | |
3263 | ||
3264 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3265 | { | |
3266 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
3267 | struct l2cap_disconn_rsp rsp; | |
3268 | u16 dcid, scid; | |
3269 | struct sock *sk; | |
3270 | ||
3271 | scid = __le16_to_cpu(req->scid); | |
3272 | dcid = __le16_to_cpu(req->dcid); | |
3273 | ||
3274 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
3275 | ||
af05b30b GP |
3276 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
3277 | if (!sk) | |
1da177e4 LT |
3278 | return 0; |
3279 | ||
aca3192c YH |
3280 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
3281 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
3282 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
3283 | ||
3284 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3285 | ||
3286 | l2cap_chan_del(sk, ECONNRESET); | |
3287 | bh_unlock_sock(sk); | |
3288 | ||
3289 | l2cap_sock_kill(sk); | |
3290 | return 0; | |
3291 | } | |
3292 | ||
3293 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3294 | { | |
3295 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
3296 | u16 dcid, scid; | |
3297 | struct sock *sk; | |
3298 | ||
3299 | scid = __le16_to_cpu(rsp->scid); | |
3300 | dcid = __le16_to_cpu(rsp->dcid); | |
3301 | ||
3302 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
3303 | ||
af05b30b GP |
3304 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
3305 | if (!sk) | |
1da177e4 LT |
3306 | return 0; |
3307 | ||
3308 | l2cap_chan_del(sk, 0); | |
3309 | bh_unlock_sock(sk); | |
3310 | ||
3311 | l2cap_sock_kill(sk); | |
3312 | return 0; | |
3313 | } | |
3314 | ||
3315 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3316 | { | |
3317 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
3318 | u16 type; |
3319 | ||
3320 | type = __le16_to_cpu(req->type); | |
3321 | ||
3322 | BT_DBG("type 0x%4.4x", type); | |
3323 | ||
f0709e03 MH |
3324 | if (type == L2CAP_IT_FEAT_MASK) { |
3325 | u8 buf[8]; | |
44dd46de | 3326 | u32 feat_mask = l2cap_feat_mask; |
f0709e03 MH |
3327 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
3328 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
3329 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
d1c4a17d | 3330 | if (!disable_ertm) |
fcc203c3 GP |
3331 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
3332 | | L2CAP_FEAT_FCS; | |
1b7bf4ed | 3333 | put_unaligned_le32(feat_mask, rsp->data); |
f0709e03 MH |
3334 | l2cap_send_cmd(conn, cmd->ident, |
3335 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
e1027a7c MH |
3336 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
3337 | u8 buf[12]; | |
3338 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
3339 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
3340 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
3341 | memcpy(buf + 4, l2cap_fixed_chan, 8); | |
3342 | l2cap_send_cmd(conn, cmd->ident, | |
3343 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
f0709e03 MH |
3344 | } else { |
3345 | struct l2cap_info_rsp rsp; | |
3346 | rsp.type = cpu_to_le16(type); | |
3347 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
3348 | l2cap_send_cmd(conn, cmd->ident, | |
3349 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
3350 | } | |
1da177e4 LT |
3351 | |
3352 | return 0; | |
3353 | } | |
3354 | ||
3355 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3356 | { | |
3357 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
3358 | u16 type, result; | |
3359 | ||
3360 | type = __le16_to_cpu(rsp->type); | |
3361 | result = __le16_to_cpu(rsp->result); | |
3362 | ||
3363 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
3364 | ||
4e8402a3 MH |
3365 | del_timer(&conn->info_timer); |
3366 | ||
adb08ede VT |
3367 | if (result != L2CAP_IR_SUCCESS) { |
3368 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
3369 | conn->info_ident = 0; | |
3370 | ||
3371 | l2cap_conn_start(conn); | |
3372 | ||
3373 | return 0; | |
3374 | } | |
3375 | ||
984947dc | 3376 | if (type == L2CAP_IT_FEAT_MASK) { |
83985319 | 3377 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 | 3378 | |
47ec1dcd | 3379 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
e1027a7c MH |
3380 | struct l2cap_info_req req; |
3381 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
3382 | ||
3383 | conn->info_ident = l2cap_get_ident(conn); | |
3384 | ||
3385 | l2cap_send_cmd(conn, conn->info_ident, | |
3386 | L2CAP_INFO_REQ, sizeof(req), &req); | |
3387 | } else { | |
3388 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
3389 | conn->info_ident = 0; | |
3390 | ||
3391 | l2cap_conn_start(conn); | |
3392 | } | |
3393 | } else if (type == L2CAP_IT_FIXED_CHAN) { | |
984947dc | 3394 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 3395 | conn->info_ident = 0; |
984947dc MH |
3396 | |
3397 | l2cap_conn_start(conn); | |
3398 | } | |
4e8402a3 | 3399 | |
1da177e4 LT |
3400 | return 0; |
3401 | } | |
3402 | ||
3403 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
3404 | { | |
3405 | u8 *data = skb->data; | |
3406 | int len = skb->len; | |
3407 | struct l2cap_cmd_hdr cmd; | |
3408 | int err = 0; | |
3409 | ||
3410 | l2cap_raw_recv(conn, skb); | |
3411 | ||
3412 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 3413 | u16 cmd_len; |
1da177e4 LT |
3414 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
3415 | data += L2CAP_CMD_HDR_SIZE; | |
3416 | len -= L2CAP_CMD_HDR_SIZE; | |
3417 | ||
88219a0f | 3418 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 3419 | |
88219a0f | 3420 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 3421 | |
88219a0f | 3422 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
3423 | BT_DBG("corrupted command"); |
3424 | break; | |
3425 | } | |
3426 | ||
3427 | switch (cmd.code) { | |
3428 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 3429 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
3430 | break; |
3431 | ||
3432 | case L2CAP_CONN_REQ: | |
3433 | err = l2cap_connect_req(conn, &cmd, data); | |
3434 | break; | |
3435 | ||
3436 | case L2CAP_CONN_RSP: | |
3437 | err = l2cap_connect_rsp(conn, &cmd, data); | |
3438 | break; | |
3439 | ||
3440 | case L2CAP_CONF_REQ: | |
88219a0f | 3441 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
3442 | break; |
3443 | ||
3444 | case L2CAP_CONF_RSP: | |
3445 | err = l2cap_config_rsp(conn, &cmd, data); | |
3446 | break; | |
3447 | ||
3448 | case L2CAP_DISCONN_REQ: | |
3449 | err = l2cap_disconnect_req(conn, &cmd, data); | |
3450 | break; | |
3451 | ||
3452 | case L2CAP_DISCONN_RSP: | |
3453 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
3454 | break; | |
3455 | ||
3456 | case L2CAP_ECHO_REQ: | |
88219a0f | 3457 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
3458 | break; |
3459 | ||
3460 | case L2CAP_ECHO_RSP: | |
3461 | break; | |
3462 | ||
3463 | case L2CAP_INFO_REQ: | |
3464 | err = l2cap_information_req(conn, &cmd, data); | |
3465 | break; | |
3466 | ||
3467 | case L2CAP_INFO_RSP: | |
3468 | err = l2cap_information_rsp(conn, &cmd, data); | |
3469 | break; | |
3470 | ||
3471 | default: | |
3472 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
3473 | err = -EINVAL; | |
3474 | break; | |
3475 | } | |
3476 | ||
3477 | if (err) { | |
3478 | struct l2cap_cmd_rej rej; | |
3479 | BT_DBG("error %d", err); | |
3480 | ||
3481 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 3482 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
3483 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
3484 | } | |
3485 | ||
88219a0f AV |
3486 | data += cmd_len; |
3487 | len -= cmd_len; | |
1da177e4 LT |
3488 | } |
3489 | ||
3490 | kfree_skb(skb); | |
3491 | } | |
3492 | ||
fcc203c3 GP |
3493 | static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb) |
3494 | { | |
3495 | u16 our_fcs, rcv_fcs; | |
3496 | int hdr_size = L2CAP_HDR_SIZE + 2; | |
3497 | ||
3498 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
3499 | skb_trim(skb, skb->len - 2); | |
3500 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); | |
3501 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); | |
3502 | ||
3503 | if (our_fcs != rcv_fcs) | |
7a560e5c | 3504 | return -EBADMSG; |
fcc203c3 GP |
3505 | } |
3506 | return 0; | |
3507 | } | |
3508 | ||
d5392c8f GP |
3509 | static inline void l2cap_send_i_or_rr_or_rnr(struct sock *sk) |
3510 | { | |
3511 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3512 | u16 control = 0; | |
3513 | ||
3514 | pi->frames_sent = 0; | |
d5392c8f GP |
3515 | |
3516 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3517 | ||
3518 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
64988868 | 3519 | control |= L2CAP_SUPER_RCV_NOT_READY; |
d5392c8f | 3520 | l2cap_send_sframe(pi, control); |
1890d36b | 3521 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
d5392c8f GP |
3522 | } |
3523 | ||
4ea727ef GP |
3524 | if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY) |
3525 | l2cap_retransmit_frames(sk); | |
d5392c8f GP |
3526 | |
3527 | l2cap_ertm_send(sk); | |
3528 | ||
3529 | if (!(pi->conn_state & L2CAP_CONN_LOCAL_BUSY) && | |
3530 | pi->frames_sent == 0) { | |
3531 | control |= L2CAP_SUPER_RCV_READY; | |
d5392c8f GP |
3532 | l2cap_send_sframe(pi, control); |
3533 | } | |
3534 | } | |
3535 | ||
9b53350d | 3536 | static int l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar) |
8f17154f GP |
3537 | { |
3538 | struct sk_buff *next_skb; | |
bfbacc11 JPRV |
3539 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
3540 | int tx_seq_offset, next_tx_seq_offset; | |
8f17154f GP |
3541 | |
3542 | bt_cb(skb)->tx_seq = tx_seq; | |
3543 | bt_cb(skb)->sar = sar; | |
3544 | ||
3545 | next_skb = skb_peek(SREJ_QUEUE(sk)); | |
3546 | if (!next_skb) { | |
3547 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
9b53350d | 3548 | return 0; |
8f17154f GP |
3549 | } |
3550 | ||
bfbacc11 JPRV |
3551 | tx_seq_offset = (tx_seq - pi->buffer_seq) % 64; |
3552 | if (tx_seq_offset < 0) | |
3553 | tx_seq_offset += 64; | |
3554 | ||
8f17154f | 3555 | do { |
9b53350d JPRV |
3556 | if (bt_cb(next_skb)->tx_seq == tx_seq) |
3557 | return -EINVAL; | |
3558 | ||
bfbacc11 JPRV |
3559 | next_tx_seq_offset = (bt_cb(next_skb)->tx_seq - |
3560 | pi->buffer_seq) % 64; | |
3561 | if (next_tx_seq_offset < 0) | |
3562 | next_tx_seq_offset += 64; | |
3563 | ||
3564 | if (next_tx_seq_offset > tx_seq_offset) { | |
8f17154f | 3565 | __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb); |
9b53350d | 3566 | return 0; |
8f17154f GP |
3567 | } |
3568 | ||
3569 | if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb)) | |
3570 | break; | |
3571 | ||
59203a21 | 3572 | } while ((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb))); |
8f17154f GP |
3573 | |
3574 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
9b53350d JPRV |
3575 | |
3576 | return 0; | |
8f17154f GP |
3577 | } |
3578 | ||
18778a63 GP |
3579 | static int l2cap_ertm_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
3580 | { | |
3581 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3582 | struct sk_buff *_skb; | |
1890d36b | 3583 | int err; |
18778a63 GP |
3584 | |
3585 | switch (control & L2CAP_CTRL_SAR) { | |
3586 | case L2CAP_SDU_UNSEGMENTED: | |
3587 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) | |
3588 | goto drop; | |
3589 | ||
3590 | err = sock_queue_rcv_skb(sk, skb); | |
3591 | if (!err) | |
3592 | return err; | |
3593 | ||
3594 | break; | |
3595 | ||
3596 | case L2CAP_SDU_START: | |
3597 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) | |
3598 | goto drop; | |
3599 | ||
3600 | pi->sdu_len = get_unaligned_le16(skb->data); | |
18778a63 GP |
3601 | |
3602 | if (pi->sdu_len > pi->imtu) | |
3603 | goto disconnect; | |
3604 | ||
3605 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); | |
1890d36b GP |
3606 | if (!pi->sdu) |
3607 | return -ENOMEM; | |
3608 | ||
3609 | /* pull sdu_len bytes only after alloc, because of Local Busy | |
3610 | * condition we have to be sure that this will be executed | |
3611 | * only once, i.e., when alloc does not fail */ | |
3612 | skb_pull(skb, 2); | |
18778a63 GP |
3613 | |
3614 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3615 | ||
3616 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3617 | pi->partial_sdu_len = skb->len; | |
3618 | break; | |
3619 | ||
3620 | case L2CAP_SDU_CONTINUE: | |
3621 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3622 | goto disconnect; | |
3623 | ||
3624 | if (!pi->sdu) | |
3625 | goto disconnect; | |
3626 | ||
18778a63 GP |
3627 | pi->partial_sdu_len += skb->len; |
3628 | if (pi->partial_sdu_len > pi->sdu_len) | |
3629 | goto drop; | |
3630 | ||
4178ba46 GP |
3631 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
3632 | ||
18778a63 GP |
3633 | break; |
3634 | ||
3635 | case L2CAP_SDU_END: | |
3636 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3637 | goto disconnect; | |
3638 | ||
3639 | if (!pi->sdu) | |
3640 | goto disconnect; | |
3641 | ||
1890d36b | 3642 | if (!(pi->conn_state & L2CAP_CONN_SAR_RETRY)) { |
1890d36b | 3643 | pi->partial_sdu_len += skb->len; |
18778a63 | 3644 | |
1890d36b GP |
3645 | if (pi->partial_sdu_len > pi->imtu) |
3646 | goto drop; | |
18778a63 | 3647 | |
1890d36b GP |
3648 | if (pi->partial_sdu_len != pi->sdu_len) |
3649 | goto drop; | |
4178ba46 GP |
3650 | |
3651 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
1890d36b | 3652 | } |
18778a63 GP |
3653 | |
3654 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
1890d36b GP |
3655 | if (!_skb) { |
3656 | pi->conn_state |= L2CAP_CONN_SAR_RETRY; | |
3657 | return -ENOMEM; | |
3658 | } | |
3659 | ||
18778a63 | 3660 | err = sock_queue_rcv_skb(sk, _skb); |
1890d36b | 3661 | if (err < 0) { |
18778a63 | 3662 | kfree_skb(_skb); |
1890d36b GP |
3663 | pi->conn_state |= L2CAP_CONN_SAR_RETRY; |
3664 | return err; | |
3665 | } | |
3666 | ||
3667 | pi->conn_state &= ~L2CAP_CONN_SAR_RETRY; | |
3668 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
18778a63 GP |
3669 | |
3670 | kfree_skb(pi->sdu); | |
3671 | break; | |
3672 | } | |
3673 | ||
3674 | kfree_skb(skb); | |
1890d36b | 3675 | return 0; |
18778a63 GP |
3676 | |
3677 | drop: | |
3678 | kfree_skb(pi->sdu); | |
3679 | pi->sdu = NULL; | |
3680 | ||
3681 | disconnect: | |
9b108fc0 | 3682 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); |
18778a63 GP |
3683 | kfree_skb(skb); |
3684 | return 0; | |
3685 | } | |
3686 | ||
712132eb GP |
3687 | static int l2cap_try_push_rx_skb(struct sock *sk) |
3688 | { | |
3689 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3690 | struct sk_buff *skb; | |
3691 | u16 control; | |
3692 | int err; | |
3693 | ||
3694 | while ((skb = skb_dequeue(BUSY_QUEUE(sk)))) { | |
3695 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; | |
3696 | err = l2cap_ertm_reassembly_sdu(sk, skb, control); | |
3697 | if (err < 0) { | |
3698 | skb_queue_head(BUSY_QUEUE(sk), skb); | |
3699 | return -EBUSY; | |
3700 | } | |
3701 | ||
3702 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; | |
3703 | } | |
3704 | ||
3705 | if (!(pi->conn_state & L2CAP_CONN_RNR_SENT)) | |
3706 | goto done; | |
3707 | ||
3708 | control = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3709 | control |= L2CAP_SUPER_RCV_READY | L2CAP_CTRL_POLL; | |
3710 | l2cap_send_sframe(pi, control); | |
3711 | l2cap_pi(sk)->retry_count = 1; | |
3712 | ||
3713 | del_timer(&pi->retrans_timer); | |
3714 | __mod_monitor_timer(); | |
3715 | ||
3716 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
3717 | ||
3718 | done: | |
3719 | pi->conn_state &= ~L2CAP_CONN_LOCAL_BUSY; | |
3720 | pi->conn_state &= ~L2CAP_CONN_RNR_SENT; | |
3721 | ||
3722 | BT_DBG("sk %p, Exit local busy", sk); | |
3723 | ||
3724 | return 0; | |
3725 | } | |
3726 | ||
1890d36b GP |
3727 | static void l2cap_busy_work(struct work_struct *work) |
3728 | { | |
3729 | DECLARE_WAITQUEUE(wait, current); | |
3730 | struct l2cap_pinfo *pi = | |
3731 | container_of(work, struct l2cap_pinfo, busy_work); | |
3732 | struct sock *sk = (struct sock *)pi; | |
3733 | int n_tries = 0, timeo = HZ/5, err; | |
3734 | struct sk_buff *skb; | |
1890d36b GP |
3735 | |
3736 | lock_sock(sk); | |
3737 | ||
2b0b05dd | 3738 | add_wait_queue(sk_sleep(sk), &wait); |
1890d36b GP |
3739 | while ((skb = skb_peek(BUSY_QUEUE(sk)))) { |
3740 | set_current_state(TASK_INTERRUPTIBLE); | |
3741 | ||
3742 | if (n_tries++ > L2CAP_LOCAL_BUSY_TRIES) { | |
3743 | err = -EBUSY; | |
9b108fc0 | 3744 | l2cap_send_disconn_req(pi->conn, sk, EBUSY); |
712132eb | 3745 | break; |
1890d36b GP |
3746 | } |
3747 | ||
3748 | if (!timeo) | |
3749 | timeo = HZ/5; | |
3750 | ||
3751 | if (signal_pending(current)) { | |
3752 | err = sock_intr_errno(timeo); | |
712132eb | 3753 | break; |
1890d36b GP |
3754 | } |
3755 | ||
3756 | release_sock(sk); | |
3757 | timeo = schedule_timeout(timeo); | |
3758 | lock_sock(sk); | |
3759 | ||
3760 | err = sock_error(sk); | |
3761 | if (err) | |
712132eb | 3762 | break; |
1890d36b | 3763 | |
712132eb | 3764 | if (l2cap_try_push_rx_skb(sk) == 0) |
1890d36b GP |
3765 | break; |
3766 | } | |
3767 | ||
1890d36b | 3768 | set_current_state(TASK_RUNNING); |
2b0b05dd | 3769 | remove_wait_queue(sk_sleep(sk), &wait); |
1890d36b GP |
3770 | |
3771 | release_sock(sk); | |
3772 | } | |
3773 | ||
3774 | static int l2cap_push_rx_skb(struct sock *sk, struct sk_buff *skb, u16 control) | |
3775 | { | |
3776 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3777 | int sctrl, err; | |
3778 | ||
3779 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
3780 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; | |
3781 | __skb_queue_tail(BUSY_QUEUE(sk), skb); | |
712132eb GP |
3782 | return l2cap_try_push_rx_skb(sk); |
3783 | ||
3784 | ||
1890d36b GP |
3785 | } |
3786 | ||
3787 | err = l2cap_ertm_reassembly_sdu(sk, skb, control); | |
3788 | if (err >= 0) { | |
3789 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; | |
3790 | return err; | |
3791 | } | |
3792 | ||
3793 | /* Busy Condition */ | |
0e98958d GP |
3794 | BT_DBG("sk %p, Enter local busy", sk); |
3795 | ||
1890d36b GP |
3796 | pi->conn_state |= L2CAP_CONN_LOCAL_BUSY; |
3797 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; | |
3798 | __skb_queue_tail(BUSY_QUEUE(sk), skb); | |
3799 | ||
3800 | sctrl = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3801 | sctrl |= L2CAP_SUPER_RCV_NOT_READY; | |
3802 | l2cap_send_sframe(pi, sctrl); | |
3803 | ||
3804 | pi->conn_state |= L2CAP_CONN_RNR_SENT; | |
3805 | ||
7fe9b298 GP |
3806 | del_timer(&pi->ack_timer); |
3807 | ||
1890d36b GP |
3808 | queue_work(_busy_wq, &pi->busy_work); |
3809 | ||
3810 | return err; | |
3811 | } | |
3812 | ||
18778a63 | 3813 | static int l2cap_streaming_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
c74e560c GP |
3814 | { |
3815 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3816 | struct sk_buff *_skb; | |
3817 | int err = -EINVAL; | |
3818 | ||
18778a63 GP |
3819 | /* |
3820 | * TODO: We have to notify the userland if some data is lost with the | |
3821 | * Streaming Mode. | |
3822 | */ | |
3823 | ||
c74e560c GP |
3824 | switch (control & L2CAP_CTRL_SAR) { |
3825 | case L2CAP_SDU_UNSEGMENTED: | |
3826 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3827 | kfree_skb(pi->sdu); | |
3828 | break; | |
3829 | } | |
3830 | ||
3831 | err = sock_queue_rcv_skb(sk, skb); | |
3832 | if (!err) | |
3833 | return 0; | |
3834 | ||
3835 | break; | |
3836 | ||
3837 | case L2CAP_SDU_START: | |
3838 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3839 | kfree_skb(pi->sdu); | |
3840 | break; | |
3841 | } | |
3842 | ||
3843 | pi->sdu_len = get_unaligned_le16(skb->data); | |
3844 | skb_pull(skb, 2); | |
3845 | ||
052897ca GP |
3846 | if (pi->sdu_len > pi->imtu) { |
3847 | err = -EMSGSIZE; | |
3848 | break; | |
3849 | } | |
3850 | ||
c74e560c GP |
3851 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); |
3852 | if (!pi->sdu) { | |
3853 | err = -ENOMEM; | |
3854 | break; | |
3855 | } | |
3856 | ||
3857 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3858 | ||
3859 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3860 | pi->partial_sdu_len = skb->len; | |
3861 | err = 0; | |
3862 | break; | |
3863 | ||
3864 | case L2CAP_SDU_CONTINUE: | |
3865 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3866 | break; | |
3867 | ||
3868 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3869 | ||
3870 | pi->partial_sdu_len += skb->len; | |
3871 | if (pi->partial_sdu_len > pi->sdu_len) | |
3872 | kfree_skb(pi->sdu); | |
3873 | else | |
3874 | err = 0; | |
3875 | ||
3876 | break; | |
3877 | ||
3878 | case L2CAP_SDU_END: | |
3879 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3880 | break; | |
3881 | ||
3882 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3883 | ||
3884 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
3885 | pi->partial_sdu_len += skb->len; | |
3886 | ||
36f2fd58 GP |
3887 | if (pi->partial_sdu_len > pi->imtu) |
3888 | goto drop; | |
3889 | ||
c74e560c GP |
3890 | if (pi->partial_sdu_len == pi->sdu_len) { |
3891 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
3892 | err = sock_queue_rcv_skb(sk, _skb); | |
3893 | if (err < 0) | |
3894 | kfree_skb(_skb); | |
3895 | } | |
c74e560c GP |
3896 | err = 0; |
3897 | ||
36f2fd58 GP |
3898 | drop: |
3899 | kfree_skb(pi->sdu); | |
c74e560c GP |
3900 | break; |
3901 | } | |
3902 | ||
3903 | kfree_skb(skb); | |
3904 | return err; | |
3905 | } | |
3906 | ||
8f17154f GP |
3907 | static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq) |
3908 | { | |
3909 | struct sk_buff *skb; | |
afefdbc4 | 3910 | u16 control; |
8f17154f | 3911 | |
59203a21 | 3912 | while ((skb = skb_peek(SREJ_QUEUE(sk)))) { |
8f17154f GP |
3913 | if (bt_cb(skb)->tx_seq != tx_seq) |
3914 | break; | |
3915 | ||
3916 | skb = skb_dequeue(SREJ_QUEUE(sk)); | |
afefdbc4 | 3917 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
18778a63 | 3918 | l2cap_ertm_reassembly_sdu(sk, skb, control); |
8f17154f GP |
3919 | l2cap_pi(sk)->buffer_seq_srej = |
3920 | (l2cap_pi(sk)->buffer_seq_srej + 1) % 64; | |
8ff50ec0 | 3921 | tx_seq = (tx_seq + 1) % 64; |
8f17154f GP |
3922 | } |
3923 | } | |
3924 | ||
3925 | static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq) | |
3926 | { | |
3927 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3928 | struct srej_list *l, *tmp; | |
3929 | u16 control; | |
3930 | ||
59203a21 | 3931 | list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) { |
8f17154f GP |
3932 | if (l->tx_seq == tx_seq) { |
3933 | list_del(&l->list); | |
3934 | kfree(l); | |
3935 | return; | |
3936 | } | |
3937 | control = L2CAP_SUPER_SELECT_REJECT; | |
3938 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3939 | l2cap_send_sframe(pi, control); | |
3940 | list_del(&l->list); | |
3941 | list_add_tail(&l->list, SREJ_LIST(sk)); | |
3942 | } | |
3943 | } | |
3944 | ||
3945 | static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) | |
3946 | { | |
3947 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3948 | struct srej_list *new; | |
3949 | u16 control; | |
3950 | ||
3951 | while (tx_seq != pi->expected_tx_seq) { | |
3952 | control = L2CAP_SUPER_SELECT_REJECT; | |
3953 | control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3954 | l2cap_send_sframe(pi, control); | |
3955 | ||
3956 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); | |
8ff50ec0 GP |
3957 | new->tx_seq = pi->expected_tx_seq; |
3958 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
8f17154f GP |
3959 | list_add_tail(&new->list, SREJ_LIST(sk)); |
3960 | } | |
8ff50ec0 | 3961 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; |
8f17154f GP |
3962 | } |
3963 | ||
1c2acffb GP |
3964 | static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
3965 | { | |
3966 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3967 | u8 tx_seq = __get_txseq(rx_control); | |
9f121a5a | 3968 | u8 req_seq = __get_reqseq(rx_control); |
8f17154f | 3969 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
f6337c77 | 3970 | int tx_seq_offset, expected_tx_seq_offset; |
803020c6 | 3971 | int num_to_ack = (pi->tx_win/6) + 1; |
1c2acffb GP |
3972 | int err = 0; |
3973 | ||
0e98958d GP |
3974 | BT_DBG("sk %p len %d tx_seq %d rx_control 0x%4.4x", sk, skb->len, tx_seq, |
3975 | rx_control); | |
1c2acffb | 3976 | |
9b16dc65 GP |
3977 | if (L2CAP_CTRL_FINAL & rx_control && |
3978 | l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) { | |
1d8f5d16 GP |
3979 | del_timer(&pi->monitor_timer); |
3980 | if (pi->unacked_frames > 0) | |
3981 | __mod_retrans_timer(); | |
3982 | pi->conn_state &= ~L2CAP_CONN_WAIT_F; | |
3983 | } | |
3984 | ||
9f121a5a GP |
3985 | pi->expected_ack_seq = req_seq; |
3986 | l2cap_drop_acked_frames(sk); | |
3987 | ||
8f17154f GP |
3988 | if (tx_seq == pi->expected_tx_seq) |
3989 | goto expected; | |
1c2acffb | 3990 | |
9b53350d JPRV |
3991 | tx_seq_offset = (tx_seq - pi->buffer_seq) % 64; |
3992 | if (tx_seq_offset < 0) | |
3993 | tx_seq_offset += 64; | |
3994 | ||
3995 | /* invalid tx_seq */ | |
3996 | if (tx_seq_offset >= pi->tx_win) { | |
9b108fc0 | 3997 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); |
9b53350d JPRV |
3998 | goto drop; |
3999 | } | |
4000 | ||
1890d36b GP |
4001 | if (pi->conn_state == L2CAP_CONN_LOCAL_BUSY) |
4002 | goto drop; | |
4003 | ||
8f17154f GP |
4004 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
4005 | struct srej_list *first; | |
30afb5b2 | 4006 | |
8f17154f GP |
4007 | first = list_first_entry(SREJ_LIST(sk), |
4008 | struct srej_list, list); | |
4009 | if (tx_seq == first->tx_seq) { | |
4010 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
4011 | l2cap_check_srej_gap(sk, tx_seq); | |
4012 | ||
4013 | list_del(&first->list); | |
4014 | kfree(first); | |
4015 | ||
4016 | if (list_empty(SREJ_LIST(sk))) { | |
4017 | pi->buffer_seq = pi->buffer_seq_srej; | |
4018 | pi->conn_state &= ~L2CAP_CONN_SREJ_SENT; | |
855666cc | 4019 | l2cap_send_ack(pi); |
0e98958d | 4020 | BT_DBG("sk %p, Exit SREJ_SENT", sk); |
8f17154f GP |
4021 | } |
4022 | } else { | |
4023 | struct srej_list *l; | |
9b53350d JPRV |
4024 | |
4025 | /* duplicated tx_seq */ | |
4026 | if (l2cap_add_to_srej_queue(sk, skb, tx_seq, sar) < 0) | |
4027 | goto drop; | |
8f17154f GP |
4028 | |
4029 | list_for_each_entry(l, SREJ_LIST(sk), list) { | |
4030 | if (l->tx_seq == tx_seq) { | |
4031 | l2cap_resend_srejframe(sk, tx_seq); | |
4032 | return 0; | |
4033 | } | |
4034 | } | |
4035 | l2cap_send_srejframe(sk, tx_seq); | |
30afb5b2 GP |
4036 | } |
4037 | } else { | |
9b53350d JPRV |
4038 | expected_tx_seq_offset = |
4039 | (pi->expected_tx_seq - pi->buffer_seq) % 64; | |
4040 | if (expected_tx_seq_offset < 0) | |
4041 | expected_tx_seq_offset += 64; | |
4042 | ||
4043 | /* duplicated tx_seq */ | |
4044 | if (tx_seq_offset < expected_tx_seq_offset) | |
4045 | goto drop; | |
4046 | ||
8f17154f | 4047 | pi->conn_state |= L2CAP_CONN_SREJ_SENT; |
1c2acffb | 4048 | |
0e98958d GP |
4049 | BT_DBG("sk %p, Enter SREJ", sk); |
4050 | ||
8f17154f GP |
4051 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
4052 | pi->buffer_seq_srej = pi->buffer_seq; | |
4053 | ||
4054 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b | 4055 | __skb_queue_head_init(BUSY_QUEUE(sk)); |
8f17154f GP |
4056 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
4057 | ||
ef54fd93 GP |
4058 | pi->conn_state |= L2CAP_CONN_SEND_PBIT; |
4059 | ||
8f17154f | 4060 | l2cap_send_srejframe(sk, tx_seq); |
7fe9b298 GP |
4061 | |
4062 | del_timer(&pi->ack_timer); | |
1c2acffb | 4063 | } |
30afb5b2 GP |
4064 | return 0; |
4065 | ||
8f17154f GP |
4066 | expected: |
4067 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
4068 | ||
4069 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { | |
3b1a9f3f GP |
4070 | bt_cb(skb)->tx_seq = tx_seq; |
4071 | bt_cb(skb)->sar = sar; | |
4072 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
8f17154f GP |
4073 | return 0; |
4074 | } | |
4075 | ||
2ece3684 GP |
4076 | err = l2cap_push_rx_skb(sk, skb, rx_control); |
4077 | if (err < 0) | |
4078 | return 0; | |
4079 | ||
4ec10d97 GP |
4080 | if (rx_control & L2CAP_CTRL_FINAL) { |
4081 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
4082 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4083 | else |
4084 | l2cap_retransmit_frames(sk); | |
4ec10d97 GP |
4085 | } |
4086 | ||
c1b4f43b GP |
4087 | __mod_ack_timer(); |
4088 | ||
803020c6 GP |
4089 | pi->num_acked = (pi->num_acked + 1) % num_to_ack; |
4090 | if (pi->num_acked == num_to_ack - 1) | |
9e917af1 GP |
4091 | l2cap_send_ack(pi); |
4092 | ||
8f17154f | 4093 | return 0; |
9b53350d JPRV |
4094 | |
4095 | drop: | |
4096 | kfree_skb(skb); | |
4097 | return 0; | |
1c2acffb GP |
4098 | } |
4099 | ||
e072745f | 4100 | static inline void l2cap_data_channel_rrframe(struct sock *sk, u16 rx_control) |
1c2acffb GP |
4101 | { |
4102 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
6e3a5981 | 4103 | |
0e98958d GP |
4104 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, __get_reqseq(rx_control), |
4105 | rx_control); | |
4106 | ||
6e3a5981 GP |
4107 | pi->expected_ack_seq = __get_reqseq(rx_control); |
4108 | l2cap_drop_acked_frames(sk); | |
1c2acffb | 4109 | |
e072745f | 4110 | if (rx_control & L2CAP_CTRL_POLL) { |
3cb123d1 | 4111 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; |
05fbd89d GP |
4112 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
4113 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && | |
4114 | (pi->unacked_frames > 0)) | |
4115 | __mod_retrans_timer(); | |
4116 | ||
4117 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; | |
4118 | l2cap_send_srejtail(sk); | |
4119 | } else { | |
4120 | l2cap_send_i_or_rr_or_rnr(sk); | |
05fbd89d | 4121 | } |
1d8f5d16 | 4122 | |
e072745f GP |
4123 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
4124 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; | |
4ec10d97 | 4125 | |
e072745f GP |
4126 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
4127 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4128 | else |
4129 | l2cap_retransmit_frames(sk); | |
2246b2f1 | 4130 | |
e072745f | 4131 | } else { |
e072745f GP |
4132 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
4133 | (pi->unacked_frames > 0)) | |
4134 | __mod_retrans_timer(); | |
1c2acffb | 4135 | |
2246b2f1 | 4136 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
dfc909be | 4137 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
e072745f | 4138 | l2cap_send_ack(pi); |
dfc909be | 4139 | } else { |
e072745f | 4140 | l2cap_ertm_send(sk); |
dfc909be | 4141 | } |
e072745f GP |
4142 | } |
4143 | } | |
2246b2f1 | 4144 | |
e072745f GP |
4145 | static inline void l2cap_data_channel_rejframe(struct sock *sk, u16 rx_control) |
4146 | { | |
4147 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4148 | u8 tx_seq = __get_reqseq(rx_control); | |
30afb5b2 | 4149 | |
0e98958d GP |
4150 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4151 | ||
e072745f GP |
4152 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
4153 | ||
8abb52ee | 4154 | pi->expected_ack_seq = tx_seq; |
e072745f GP |
4155 | l2cap_drop_acked_frames(sk); |
4156 | ||
4157 | if (rx_control & L2CAP_CTRL_FINAL) { | |
4158 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
4159 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4160 | else |
4161 | l2cap_retransmit_frames(sk); | |
e072745f | 4162 | } else { |
dfc909be | 4163 | l2cap_retransmit_frames(sk); |
30afb5b2 | 4164 | |
0301ef04 | 4165 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
e072745f | 4166 | pi->conn_state |= L2CAP_CONN_REJ_ACT; |
e072745f GP |
4167 | } |
4168 | } | |
4169 | static inline void l2cap_data_channel_srejframe(struct sock *sk, u16 rx_control) | |
4170 | { | |
4171 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4172 | u8 tx_seq = __get_reqseq(rx_control); | |
30afb5b2 | 4173 | |
0e98958d GP |
4174 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4175 | ||
e072745f | 4176 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
2246b2f1 | 4177 | |
e072745f GP |
4178 | if (rx_control & L2CAP_CTRL_POLL) { |
4179 | pi->expected_ack_seq = tx_seq; | |
4180 | l2cap_drop_acked_frames(sk); | |
3cb123d1 GP |
4181 | |
4182 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; | |
dfc909be GP |
4183 | l2cap_retransmit_one_frame(sk, tx_seq); |
4184 | ||
e072745f | 4185 | l2cap_ertm_send(sk); |
dfc909be | 4186 | |
e072745f GP |
4187 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
4188 | pi->srej_save_reqseq = tx_seq; | |
4189 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
ef54fd93 | 4190 | } |
e072745f GP |
4191 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
4192 | if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && | |
4193 | pi->srej_save_reqseq == tx_seq) | |
4194 | pi->conn_state &= ~L2CAP_CONN_SREJ_ACT; | |
4195 | else | |
dfc909be | 4196 | l2cap_retransmit_one_frame(sk, tx_seq); |
e072745f | 4197 | } else { |
dfc909be | 4198 | l2cap_retransmit_one_frame(sk, tx_seq); |
e072745f GP |
4199 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
4200 | pi->srej_save_reqseq = tx_seq; | |
4201 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
ef54fd93 | 4202 | } |
e072745f GP |
4203 | } |
4204 | } | |
4205 | ||
4206 | static inline void l2cap_data_channel_rnrframe(struct sock *sk, u16 rx_control) | |
4207 | { | |
4208 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4209 | u8 tx_seq = __get_reqseq(rx_control); | |
4210 | ||
0e98958d GP |
4211 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4212 | ||
e072745f GP |
4213 | pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; |
4214 | pi->expected_ack_seq = tx_seq; | |
4215 | l2cap_drop_acked_frames(sk); | |
4216 | ||
3cb123d1 GP |
4217 | if (rx_control & L2CAP_CTRL_POLL) |
4218 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; | |
4219 | ||
99b0d4b7 GP |
4220 | if (!(pi->conn_state & L2CAP_CONN_SREJ_SENT)) { |
4221 | del_timer(&pi->retrans_timer); | |
a2e12a2a GP |
4222 | if (rx_control & L2CAP_CTRL_POLL) |
4223 | l2cap_send_rr_or_rnr(pi, L2CAP_CTRL_FINAL); | |
99b0d4b7 | 4224 | return; |
e072745f | 4225 | } |
99b0d4b7 GP |
4226 | |
4227 | if (rx_control & L2CAP_CTRL_POLL) | |
4228 | l2cap_send_srejtail(sk); | |
4229 | else | |
4230 | l2cap_send_sframe(pi, L2CAP_SUPER_RCV_READY); | |
e072745f GP |
4231 | } |
4232 | ||
4233 | static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) | |
4234 | { | |
4235 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
4236 | ||
9b16dc65 GP |
4237 | if (L2CAP_CTRL_FINAL & rx_control && |
4238 | l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) { | |
e072745f GP |
4239 | del_timer(&l2cap_pi(sk)->monitor_timer); |
4240 | if (l2cap_pi(sk)->unacked_frames > 0) | |
4241 | __mod_retrans_timer(); | |
4242 | l2cap_pi(sk)->conn_state &= ~L2CAP_CONN_WAIT_F; | |
4243 | } | |
4244 | ||
4245 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { | |
4246 | case L2CAP_SUPER_RCV_READY: | |
4247 | l2cap_data_channel_rrframe(sk, rx_control); | |
8f17154f GP |
4248 | break; |
4249 | ||
e072745f GP |
4250 | case L2CAP_SUPER_REJECT: |
4251 | l2cap_data_channel_rejframe(sk, rx_control); | |
4252 | break; | |
2246b2f1 | 4253 | |
e072745f GP |
4254 | case L2CAP_SUPER_SELECT_REJECT: |
4255 | l2cap_data_channel_srejframe(sk, rx_control); | |
4256 | break; | |
4257 | ||
4258 | case L2CAP_SUPER_RCV_NOT_READY: | |
4259 | l2cap_data_channel_rnrframe(sk, rx_control); | |
1c2acffb GP |
4260 | break; |
4261 | } | |
4262 | ||
faaebd19 | 4263 | kfree_skb(skb); |
1c2acffb GP |
4264 | return 0; |
4265 | } | |
4266 | ||
218bb9df GP |
4267 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb) |
4268 | { | |
4269 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4270 | u16 control; | |
4271 | u8 req_seq; | |
4272 | int len, next_tx_seq_offset, req_seq_offset; | |
4273 | ||
4274 | control = get_unaligned_le16(skb->data); | |
4275 | skb_pull(skb, 2); | |
4276 | len = skb->len; | |
4277 | ||
4278 | /* | |
4279 | * We can just drop the corrupted I-frame here. | |
4280 | * Receiver will miss it and start proper recovery | |
4281 | * procedures and ask retransmission. | |
4282 | */ | |
4283 | if (l2cap_check_fcs(pi, skb)) | |
4284 | goto drop; | |
4285 | ||
4286 | if (__is_sar_start(control) && __is_iframe(control)) | |
4287 | len -= 2; | |
4288 | ||
4289 | if (pi->fcs == L2CAP_FCS_CRC16) | |
4290 | len -= 2; | |
4291 | ||
4292 | if (len > pi->mps) { | |
4293 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4294 | goto drop; | |
4295 | } | |
4296 | ||
4297 | req_seq = __get_reqseq(control); | |
4298 | req_seq_offset = (req_seq - pi->expected_ack_seq) % 64; | |
4299 | if (req_seq_offset < 0) | |
4300 | req_seq_offset += 64; | |
4301 | ||
4302 | next_tx_seq_offset = | |
4303 | (pi->next_tx_seq - pi->expected_ack_seq) % 64; | |
4304 | if (next_tx_seq_offset < 0) | |
4305 | next_tx_seq_offset += 64; | |
4306 | ||
4307 | /* check for invalid req-seq */ | |
4308 | if (req_seq_offset > next_tx_seq_offset) { | |
4309 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4310 | goto drop; | |
4311 | } | |
4312 | ||
4313 | if (__is_iframe(control)) { | |
4314 | if (len < 0) { | |
4315 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4316 | goto drop; | |
4317 | } | |
4318 | ||
4319 | l2cap_data_channel_iframe(sk, control, skb); | |
4320 | } else { | |
4321 | if (len != 0) { | |
4322 | BT_ERR("%d", len); | |
4323 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4324 | goto drop; | |
4325 | } | |
4326 | ||
4327 | l2cap_data_channel_sframe(sk, control, skb); | |
4328 | } | |
4329 | ||
4330 | return 0; | |
4331 | ||
4332 | drop: | |
4333 | kfree_skb(skb); | |
4334 | return 0; | |
4335 | } | |
4336 | ||
1da177e4 LT |
4337 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
4338 | { | |
4339 | struct sock *sk; | |
6840ed07 | 4340 | struct l2cap_pinfo *pi; |
51893f88 | 4341 | u16 control; |
218bb9df GP |
4342 | u8 tx_seq; |
4343 | int len; | |
1da177e4 LT |
4344 | |
4345 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
4346 | if (!sk) { | |
4347 | BT_DBG("unknown cid 0x%4.4x", cid); | |
4348 | goto drop; | |
4349 | } | |
4350 | ||
6840ed07 GP |
4351 | pi = l2cap_pi(sk); |
4352 | ||
1da177e4 LT |
4353 | BT_DBG("sk %p, len %d", sk, skb->len); |
4354 | ||
4355 | if (sk->sk_state != BT_CONNECTED) | |
4356 | goto drop; | |
4357 | ||
6840ed07 | 4358 | switch (pi->mode) { |
1c2acffb GP |
4359 | case L2CAP_MODE_BASIC: |
4360 | /* If socket recv buffers overflows we drop data here | |
4361 | * which is *bad* because L2CAP has to be reliable. | |
4362 | * But we don't have any other choice. L2CAP doesn't | |
4363 | * provide flow control mechanism. */ | |
1da177e4 | 4364 | |
6840ed07 | 4365 | if (pi->imtu < skb->len) |
1c2acffb | 4366 | goto drop; |
1da177e4 | 4367 | |
1c2acffb GP |
4368 | if (!sock_queue_rcv_skb(sk, skb)) |
4369 | goto done; | |
4370 | break; | |
4371 | ||
4372 | case L2CAP_MODE_ERTM: | |
218bb9df GP |
4373 | if (!sock_owned_by_user(sk)) { |
4374 | l2cap_ertm_data_rcv(sk, skb); | |
277ffbe3 | 4375 | } else { |
218bb9df | 4376 | if (sk_add_backlog(sk, skb)) |
277ffbe3 | 4377 | goto drop; |
277ffbe3 | 4378 | } |
1c2acffb | 4379 | |
fcafde2e | 4380 | goto done; |
1c2acffb | 4381 | |
6840ed07 GP |
4382 | case L2CAP_MODE_STREAMING: |
4383 | control = get_unaligned_le16(skb->data); | |
4384 | skb_pull(skb, 2); | |
4385 | len = skb->len; | |
4386 | ||
26000089 GP |
4387 | if (l2cap_check_fcs(pi, skb)) |
4388 | goto drop; | |
4389 | ||
6840ed07 GP |
4390 | if (__is_sar_start(control)) |
4391 | len -= 2; | |
4392 | ||
fcc203c3 GP |
4393 | if (pi->fcs == L2CAP_FCS_CRC16) |
4394 | len -= 2; | |
4395 | ||
51893f88 | 4396 | if (len > pi->mps || len < 0 || __is_sframe(control)) |
6840ed07 GP |
4397 | goto drop; |
4398 | ||
4399 | tx_seq = __get_txseq(control); | |
4400 | ||
4401 | if (pi->expected_tx_seq == tx_seq) | |
4402 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
4403 | else | |
7dffe421 | 4404 | pi->expected_tx_seq = (tx_seq + 1) % 64; |
6840ed07 | 4405 | |
18778a63 | 4406 | l2cap_streaming_reassembly_sdu(sk, skb, control); |
6840ed07 GP |
4407 | |
4408 | goto done; | |
4409 | ||
1c2acffb | 4410 | default: |
e8235c6b | 4411 | BT_DBG("sk %p: bad mode 0x%2.2x", sk, pi->mode); |
1c2acffb GP |
4412 | break; |
4413 | } | |
1da177e4 LT |
4414 | |
4415 | drop: | |
4416 | kfree_skb(skb); | |
4417 | ||
4418 | done: | |
0139418c MH |
4419 | if (sk) |
4420 | bh_unlock_sock(sk); | |
4421 | ||
1da177e4 LT |
4422 | return 0; |
4423 | } | |
4424 | ||
8e036fc3 | 4425 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
4426 | { |
4427 | struct sock *sk; | |
4428 | ||
4429 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
4430 | if (!sk) | |
4431 | goto drop; | |
4432 | ||
4433 | BT_DBG("sk %p, len %d", sk, skb->len); | |
4434 | ||
4435 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
4436 | goto drop; | |
4437 | ||
4438 | if (l2cap_pi(sk)->imtu < skb->len) | |
4439 | goto drop; | |
4440 | ||
4441 | if (!sock_queue_rcv_skb(sk, skb)) | |
4442 | goto done; | |
4443 | ||
4444 | drop: | |
4445 | kfree_skb(skb); | |
4446 | ||
4447 | done: | |
af05b30b GP |
4448 | if (sk) |
4449 | bh_unlock_sock(sk); | |
1da177e4 LT |
4450 | return 0; |
4451 | } | |
4452 | ||
4453 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
4454 | { | |
4455 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
4456 | u16 cid, len; |
4457 | __le16 psm; | |
1da177e4 LT |
4458 | |
4459 | skb_pull(skb, L2CAP_HDR_SIZE); | |
4460 | cid = __le16_to_cpu(lh->cid); | |
4461 | len = __le16_to_cpu(lh->len); | |
4462 | ||
1c2acffb GP |
4463 | if (len != skb->len) { |
4464 | kfree_skb(skb); | |
4465 | return; | |
4466 | } | |
4467 | ||
1da177e4 LT |
4468 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
4469 | ||
4470 | switch (cid) { | |
8db4dc46 | 4471 | case L2CAP_CID_SIGNALING: |
1da177e4 LT |
4472 | l2cap_sig_channel(conn, skb); |
4473 | break; | |
4474 | ||
8db4dc46 | 4475 | case L2CAP_CID_CONN_LESS: |
1b7bf4ed | 4476 | psm = get_unaligned_le16(skb->data); |
1da177e4 LT |
4477 | skb_pull(skb, 2); |
4478 | l2cap_conless_channel(conn, psm, skb); | |
4479 | break; | |
4480 | ||
4481 | default: | |
4482 | l2cap_data_channel(conn, cid, skb); | |
4483 | break; | |
4484 | } | |
4485 | } | |
4486 | ||
4487 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
4488 | ||
4489 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
4490 | { | |
4491 | int exact = 0, lm1 = 0, lm2 = 0; | |
4492 | register struct sock *sk; | |
4493 | struct hlist_node *node; | |
4494 | ||
4495 | if (type != ACL_LINK) | |
963cf687 | 4496 | return -EINVAL; |
1da177e4 LT |
4497 | |
4498 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
4499 | ||
4500 | /* Find listening sockets and check their link_mode */ | |
4501 | read_lock(&l2cap_sk_list.lock); | |
4502 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
4503 | if (sk->sk_state != BT_LISTEN) | |
4504 | continue; | |
4505 | ||
4506 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
4507 | lm1 |= HCI_LM_ACCEPT; |
4508 | if (l2cap_pi(sk)->role_switch) | |
4509 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 4510 | exact++; |
2af6b9d5 MH |
4511 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
4512 | lm2 |= HCI_LM_ACCEPT; | |
4513 | if (l2cap_pi(sk)->role_switch) | |
4514 | lm2 |= HCI_LM_MASTER; | |
4515 | } | |
1da177e4 LT |
4516 | } |
4517 | read_unlock(&l2cap_sk_list.lock); | |
4518 | ||
4519 | return exact ? lm1 : lm2; | |
4520 | } | |
4521 | ||
4522 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
4523 | { | |
0139418c MH |
4524 | struct l2cap_conn *conn; |
4525 | ||
1da177e4 LT |
4526 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
4527 | ||
4528 | if (hcon->type != ACL_LINK) | |
963cf687 | 4529 | return -EINVAL; |
1da177e4 LT |
4530 | |
4531 | if (!status) { | |
1da177e4 LT |
4532 | conn = l2cap_conn_add(hcon, status); |
4533 | if (conn) | |
4534 | l2cap_conn_ready(conn); | |
0139418c | 4535 | } else |
1da177e4 LT |
4536 | l2cap_conn_del(hcon, bt_err(status)); |
4537 | ||
4538 | return 0; | |
4539 | } | |
4540 | ||
2950f21a MH |
4541 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
4542 | { | |
4543 | struct l2cap_conn *conn = hcon->l2cap_data; | |
4544 | ||
4545 | BT_DBG("hcon %p", hcon); | |
4546 | ||
4547 | if (hcon->type != ACL_LINK || !conn) | |
4548 | return 0x13; | |
4549 | ||
4550 | return conn->disc_reason; | |
4551 | } | |
4552 | ||
4553 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) | |
1da177e4 LT |
4554 | { |
4555 | BT_DBG("hcon %p reason %d", hcon, reason); | |
4556 | ||
4557 | if (hcon->type != ACL_LINK) | |
963cf687 | 4558 | return -EINVAL; |
1da177e4 LT |
4559 | |
4560 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 4561 | |
1da177e4 LT |
4562 | return 0; |
4563 | } | |
4564 | ||
f62e4323 MH |
4565 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
4566 | { | |
bd3c9e25 | 4567 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) |
255c7601 MH |
4568 | return; |
4569 | ||
f62e4323 MH |
4570 | if (encrypt == 0x00) { |
4571 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { | |
4572 | l2cap_sock_clear_timer(sk); | |
4573 | l2cap_sock_set_timer(sk, HZ * 5); | |
4574 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
4575 | __l2cap_sock_close(sk, ECONNREFUSED); | |
4576 | } else { | |
4577 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) | |
4578 | l2cap_sock_clear_timer(sk); | |
4579 | } | |
4580 | } | |
4581 | ||
8c1b2355 | 4582 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
4583 | { |
4584 | struct l2cap_chan_list *l; | |
0139418c | 4585 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 4586 | struct sock *sk; |
1da177e4 | 4587 | |
0139418c | 4588 | if (!conn) |
1da177e4 | 4589 | return 0; |
0139418c | 4590 | |
1da177e4 LT |
4591 | l = &conn->chan_list; |
4592 | ||
4593 | BT_DBG("conn %p", conn); | |
4594 | ||
4595 | read_lock(&l->lock); | |
4596 | ||
4597 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
4598 | bh_lock_sock(sk); | |
4599 | ||
6a8d3010 MH |
4600 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
4601 | bh_unlock_sock(sk); | |
4602 | continue; | |
4603 | } | |
4604 | ||
f62e4323 | 4605 | if (!status && (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 4606 | sk->sk_state == BT_CONFIG)) { |
f62e4323 | 4607 | l2cap_check_encryption(sk, encrypt); |
9719f8af MH |
4608 | bh_unlock_sock(sk); |
4609 | continue; | |
4610 | } | |
4611 | ||
b1235d79 MH |
4612 | if (sk->sk_state == BT_CONNECT) { |
4613 | if (!status) { | |
4614 | struct l2cap_conn_req req; | |
4615 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
4616 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 4617 | |
b1235d79 | 4618 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
e501d055 | 4619 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 | 4620 | |
b1235d79 MH |
4621 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4622 | L2CAP_CONN_REQ, sizeof(req), &req); | |
4623 | } else { | |
4624 | l2cap_sock_clear_timer(sk); | |
4625 | l2cap_sock_set_timer(sk, HZ / 10); | |
4626 | } | |
4627 | } else if (sk->sk_state == BT_CONNECT2) { | |
4628 | struct l2cap_conn_rsp rsp; | |
4629 | __u16 result; | |
1da177e4 | 4630 | |
b1235d79 MH |
4631 | if (!status) { |
4632 | sk->sk_state = BT_CONFIG; | |
4633 | result = L2CAP_CR_SUCCESS; | |
4634 | } else { | |
4635 | sk->sk_state = BT_DISCONN; | |
4636 | l2cap_sock_set_timer(sk, HZ / 10); | |
4637 | result = L2CAP_CR_SEC_BLOCK; | |
4638 | } | |
4639 | ||
4640 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
4641 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
4642 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 4643 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
4644 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4645 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4646 | } | |
1da177e4 LT |
4647 | |
4648 | bh_unlock_sock(sk); | |
4649 | } | |
4650 | ||
4651 | read_unlock(&l->lock); | |
b1235d79 | 4652 | |
1da177e4 LT |
4653 | return 0; |
4654 | } | |
4655 | ||
4656 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
4657 | { | |
4658 | struct l2cap_conn *conn = hcon->l2cap_data; | |
4659 | ||
4660 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
4661 | goto drop; | |
4662 | ||
4663 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
4664 | ||
4665 | if (flags & ACL_START) { | |
4666 | struct l2cap_hdr *hdr; | |
89794813 AE |
4667 | struct sock *sk; |
4668 | u16 cid; | |
1da177e4 LT |
4669 | int len; |
4670 | ||
4671 | if (conn->rx_len) { | |
4672 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
4673 | kfree_skb(conn->rx_skb); | |
4674 | conn->rx_skb = NULL; | |
4675 | conn->rx_len = 0; | |
4676 | l2cap_conn_unreliable(conn, ECOMM); | |
4677 | } | |
4678 | ||
aae7fe22 AE |
4679 | /* Start fragment always begin with Basic L2CAP header */ |
4680 | if (skb->len < L2CAP_HDR_SIZE) { | |
1da177e4 LT |
4681 | BT_ERR("Frame is too short (len %d)", skb->len); |
4682 | l2cap_conn_unreliable(conn, ECOMM); | |
4683 | goto drop; | |
4684 | } | |
4685 | ||
4686 | hdr = (struct l2cap_hdr *) skb->data; | |
4687 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
89794813 | 4688 | cid = __le16_to_cpu(hdr->cid); |
1da177e4 LT |
4689 | |
4690 | if (len == skb->len) { | |
4691 | /* Complete frame received */ | |
4692 | l2cap_recv_frame(conn, skb); | |
4693 | return 0; | |
4694 | } | |
4695 | ||
4696 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
4697 | ||
4698 | if (skb->len > len) { | |
4699 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
4700 | skb->len, len); | |
4701 | l2cap_conn_unreliable(conn, ECOMM); | |
4702 | goto drop; | |
4703 | } | |
4704 | ||
89794813 AE |
4705 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); |
4706 | ||
4707 | if (sk && l2cap_pi(sk)->imtu < len - L2CAP_HDR_SIZE) { | |
4708 | BT_ERR("Frame exceeding recv MTU (len %d, MTU %d)", | |
4709 | len, l2cap_pi(sk)->imtu); | |
4710 | bh_unlock_sock(sk); | |
4711 | l2cap_conn_unreliable(conn, ECOMM); | |
4712 | goto drop; | |
4713 | } | |
4714 | ||
4715 | if (sk) | |
4716 | bh_unlock_sock(sk); | |
4717 | ||
1da177e4 | 4718 | /* Allocate skb for the complete frame (with header) */ |
af05b30b GP |
4719 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
4720 | if (!conn->rx_skb) | |
1da177e4 LT |
4721 | goto drop; |
4722 | ||
d626f62b | 4723 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 4724 | skb->len); |
1da177e4 LT |
4725 | conn->rx_len = len - skb->len; |
4726 | } else { | |
4727 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
4728 | ||
4729 | if (!conn->rx_len) { | |
4730 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
4731 | l2cap_conn_unreliable(conn, ECOMM); | |
4732 | goto drop; | |
4733 | } | |
4734 | ||
4735 | if (skb->len > conn->rx_len) { | |
4736 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
4737 | skb->len, conn->rx_len); | |
4738 | kfree_skb(conn->rx_skb); | |
4739 | conn->rx_skb = NULL; | |
4740 | conn->rx_len = 0; | |
4741 | l2cap_conn_unreliable(conn, ECOMM); | |
4742 | goto drop; | |
4743 | } | |
4744 | ||
d626f62b | 4745 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 4746 | skb->len); |
1da177e4 LT |
4747 | conn->rx_len -= skb->len; |
4748 | ||
4749 | if (!conn->rx_len) { | |
4750 | /* Complete frame received */ | |
4751 | l2cap_recv_frame(conn, conn->rx_skb); | |
4752 | conn->rx_skb = NULL; | |
4753 | } | |
4754 | } | |
4755 | ||
4756 | drop: | |
4757 | kfree_skb(skb); | |
4758 | return 0; | |
4759 | } | |
4760 | ||
aef7d97c | 4761 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
4762 | { |
4763 | struct sock *sk; | |
4764 | struct hlist_node *node; | |
1da177e4 LT |
4765 | |
4766 | read_lock_bh(&l2cap_sk_list.lock); | |
4767 | ||
be9d1227 MH |
4768 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
4769 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
101545f6 | 4770 | |
aef7d97c MH |
4771 | seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
4772 | batostr(&bt_sk(sk)->src), | |
4773 | batostr(&bt_sk(sk)->dst), | |
4774 | sk->sk_state, __le16_to_cpu(pi->psm), | |
4775 | pi->scid, pi->dcid, | |
4776 | pi->imtu, pi->omtu, pi->sec_level); | |
be9d1227 | 4777 | } |
1da177e4 | 4778 | |
1da177e4 | 4779 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 4780 | |
aef7d97c | 4781 | return 0; |
1da177e4 LT |
4782 | } |
4783 | ||
aef7d97c MH |
4784 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
4785 | { | |
4786 | return single_open(file, l2cap_debugfs_show, inode->i_private); | |
4787 | } | |
4788 | ||
4789 | static const struct file_operations l2cap_debugfs_fops = { | |
4790 | .open = l2cap_debugfs_open, | |
4791 | .read = seq_read, | |
4792 | .llseek = seq_lseek, | |
4793 | .release = single_release, | |
4794 | }; | |
4795 | ||
4796 | static struct dentry *l2cap_debugfs; | |
1da177e4 | 4797 | |
90ddc4f0 | 4798 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
4799 | .family = PF_BLUETOOTH, |
4800 | .owner = THIS_MODULE, | |
4801 | .release = l2cap_sock_release, | |
4802 | .bind = l2cap_sock_bind, | |
4803 | .connect = l2cap_sock_connect, | |
4804 | .listen = l2cap_sock_listen, | |
4805 | .accept = l2cap_sock_accept, | |
4806 | .getname = l2cap_sock_getname, | |
4807 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 4808 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 4809 | .poll = bt_sock_poll, |
3241ad82 | 4810 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
4811 | .mmap = sock_no_mmap, |
4812 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
4813 | .shutdown = l2cap_sock_shutdown, |
4814 | .setsockopt = l2cap_sock_setsockopt, | |
4815 | .getsockopt = l2cap_sock_getsockopt | |
4816 | }; | |
4817 | ||
ec1b4cf7 | 4818 | static const struct net_proto_family l2cap_sock_family_ops = { |
1da177e4 LT |
4819 | .family = PF_BLUETOOTH, |
4820 | .owner = THIS_MODULE, | |
4821 | .create = l2cap_sock_create, | |
4822 | }; | |
4823 | ||
4824 | static struct hci_proto l2cap_hci_proto = { | |
4825 | .name = "L2CAP", | |
4826 | .id = HCI_PROTO_L2CAP, | |
4827 | .connect_ind = l2cap_connect_ind, | |
4828 | .connect_cfm = l2cap_connect_cfm, | |
4829 | .disconn_ind = l2cap_disconn_ind, | |
2950f21a | 4830 | .disconn_cfm = l2cap_disconn_cfm, |
8c1b2355 | 4831 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
4832 | .recv_acldata = l2cap_recv_acldata |
4833 | }; | |
4834 | ||
4835 | static int __init l2cap_init(void) | |
4836 | { | |
4837 | int err; | |
be9d1227 | 4838 | |
1da177e4 LT |
4839 | err = proto_register(&l2cap_proto, 0); |
4840 | if (err < 0) | |
4841 | return err; | |
4842 | ||
1890d36b GP |
4843 | _busy_wq = create_singlethread_workqueue("l2cap"); |
4844 | if (!_busy_wq) | |
4845 | goto error; | |
4846 | ||
1da177e4 LT |
4847 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
4848 | if (err < 0) { | |
4849 | BT_ERR("L2CAP socket registration failed"); | |
4850 | goto error; | |
4851 | } | |
4852 | ||
4853 | err = hci_register_proto(&l2cap_hci_proto); | |
4854 | if (err < 0) { | |
4855 | BT_ERR("L2CAP protocol registration failed"); | |
4856 | bt_sock_unregister(BTPROTO_L2CAP); | |
4857 | goto error; | |
4858 | } | |
4859 | ||
aef7d97c MH |
4860 | if (bt_debugfs) { |
4861 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, | |
4862 | bt_debugfs, NULL, &l2cap_debugfs_fops); | |
4863 | if (!l2cap_debugfs) | |
4864 | BT_ERR("Failed to create L2CAP debug file"); | |
4865 | } | |
1da177e4 LT |
4866 | |
4867 | BT_INFO("L2CAP ver %s", VERSION); | |
4868 | BT_INFO("L2CAP socket layer initialized"); | |
4869 | ||
4870 | return 0; | |
4871 | ||
4872 | error: | |
4873 | proto_unregister(&l2cap_proto); | |
4874 | return err; | |
4875 | } | |
4876 | ||
4877 | static void __exit l2cap_exit(void) | |
4878 | { | |
aef7d97c | 4879 | debugfs_remove(l2cap_debugfs); |
1da177e4 | 4880 | |
1890d36b GP |
4881 | flush_workqueue(_busy_wq); |
4882 | destroy_workqueue(_busy_wq); | |
4883 | ||
1da177e4 LT |
4884 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
4885 | BT_ERR("L2CAP socket unregistration failed"); | |
4886 | ||
4887 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
4888 | BT_ERR("L2CAP protocol unregistration failed"); | |
4889 | ||
4890 | proto_unregister(&l2cap_proto); | |
4891 | } | |
4892 | ||
4893 | void l2cap_load(void) | |
4894 | { | |
4895 | /* Dummy function to trigger automatic L2CAP module loading by | |
4896 | * other modules that use L2CAP sockets but don't use any other | |
4897 | * symbols from it. */ | |
1da177e4 LT |
4898 | } |
4899 | EXPORT_SYMBOL(l2cap_load); | |
4900 | ||
4901 | module_init(l2cap_init); | |
4902 | module_exit(l2cap_exit); | |
4903 | ||
d1c4a17d GP |
4904 | module_param(disable_ertm, bool, 0644); |
4905 | MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode"); | |
44dd46de | 4906 | |
63fbd24e | 4907 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
4908 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
4909 | MODULE_VERSION(VERSION); | |
4910 | MODULE_LICENSE("GPL"); | |
4911 | MODULE_ALIAS("bt-proto-0"); |