Commit | Line | Data |
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8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth L2CAP core and sockets. */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
4fc268d2 | 30 | #include <linux/capability.h> |
1da177e4 LT |
31 | #include <linux/errno.h> |
32 | #include <linux/kernel.h> | |
1da177e4 LT |
33 | #include <linux/sched.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/fcntl.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/socket.h> | |
40 | #include <linux/skbuff.h> | |
1da177e4 | 41 | #include <linux/list.h> |
be9d1227 | 42 | #include <linux/device.h> |
aef7d97c MH |
43 | #include <linux/debugfs.h> |
44 | #include <linux/seq_file.h> | |
af05b30b | 45 | #include <linux/uaccess.h> |
fcc203c3 | 46 | #include <linux/crc16.h> |
1da177e4 LT |
47 | #include <net/sock.h> |
48 | ||
49 | #include <asm/system.h> | |
1da177e4 LT |
50 | #include <asm/unaligned.h> |
51 | ||
52 | #include <net/bluetooth/bluetooth.h> | |
53 | #include <net/bluetooth/hci_core.h> | |
54 | #include <net/bluetooth/l2cap.h> | |
55 | ||
44dd46de MH |
56 | #define VERSION "2.14" |
57 | ||
58 | static int enable_ertm = 0; | |
f0709e03 | 59 | |
47ec1dcd | 60 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
e1027a7c | 61 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
1da177e4 | 62 | |
90ddc4f0 | 63 | static const struct proto_ops l2cap_sock_ops; |
1da177e4 | 64 | |
1890d36b GP |
65 | static struct workqueue_struct *_busy_wq; |
66 | ||
1da177e4 | 67 | static struct bt_sock_list l2cap_sk_list = { |
d5fb2962 | 68 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
1da177e4 LT |
69 | }; |
70 | ||
1890d36b GP |
71 | static void l2cap_busy_work(struct work_struct *work); |
72 | ||
1da177e4 LT |
73 | static void __l2cap_sock_close(struct sock *sk, int reason); |
74 | static void l2cap_sock_close(struct sock *sk); | |
75 | static void l2cap_sock_kill(struct sock *sk); | |
76 | ||
e9aeb2dd | 77 | static int l2cap_build_conf_req(struct sock *sk, void *data); |
1da177e4 LT |
78 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
79 | u8 code, u8 ident, u16 dlen, void *data); | |
80 | ||
218bb9df GP |
81 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb); |
82 | ||
1da177e4 LT |
83 | /* ---- L2CAP timers ---- */ |
84 | static void l2cap_sock_timeout(unsigned long arg) | |
85 | { | |
86 | struct sock *sk = (struct sock *) arg; | |
b1235d79 | 87 | int reason; |
1da177e4 LT |
88 | |
89 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
90 | ||
91 | bh_lock_sock(sk); | |
b1235d79 | 92 | |
f62e4323 MH |
93 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
94 | reason = ECONNREFUSED; | |
95 | else if (sk->sk_state == BT_CONNECT && | |
2af6b9d5 | 96 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
b1235d79 MH |
97 | reason = ECONNREFUSED; |
98 | else | |
99 | reason = ETIMEDOUT; | |
100 | ||
101 | __l2cap_sock_close(sk, reason); | |
102 | ||
1da177e4 LT |
103 | bh_unlock_sock(sk); |
104 | ||
105 | l2cap_sock_kill(sk); | |
106 | sock_put(sk); | |
107 | } | |
108 | ||
109 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
110 | { | |
111 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
112 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
113 | } | |
114 | ||
115 | static void l2cap_sock_clear_timer(struct sock *sk) | |
116 | { | |
117 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
118 | sk_stop_timer(sk, &sk->sk_timer); | |
119 | } | |
120 | ||
0139418c MH |
121 | /* ---- L2CAP channels ---- */ |
122 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
123 | { | |
124 | struct sock *s; | |
125 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
126 | if (l2cap_pi(s)->dcid == cid) | |
127 | break; | |
128 | } | |
129 | return s; | |
130 | } | |
131 | ||
132 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
133 | { | |
134 | struct sock *s; | |
135 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
136 | if (l2cap_pi(s)->scid == cid) | |
137 | break; | |
138 | } | |
139 | return s; | |
140 | } | |
141 | ||
142 | /* Find channel with given SCID. | |
143 | * Returns locked socket */ | |
144 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
145 | { | |
146 | struct sock *s; | |
147 | read_lock(&l->lock); | |
148 | s = __l2cap_get_chan_by_scid(l, cid); | |
af05b30b GP |
149 | if (s) |
150 | bh_lock_sock(s); | |
0139418c MH |
151 | read_unlock(&l->lock); |
152 | return s; | |
153 | } | |
154 | ||
155 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
156 | { | |
157 | struct sock *s; | |
158 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
159 | if (l2cap_pi(s)->ident == ident) | |
160 | break; | |
161 | } | |
162 | return s; | |
163 | } | |
164 | ||
165 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
166 | { | |
167 | struct sock *s; | |
168 | read_lock(&l->lock); | |
169 | s = __l2cap_get_chan_by_ident(l, ident); | |
af05b30b GP |
170 | if (s) |
171 | bh_lock_sock(s); | |
0139418c MH |
172 | read_unlock(&l->lock); |
173 | return s; | |
174 | } | |
175 | ||
176 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
177 | { | |
8db4dc46 | 178 | u16 cid = L2CAP_CID_DYN_START; |
0139418c | 179 | |
8db4dc46 | 180 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
af05b30b | 181 | if (!__l2cap_get_chan_by_scid(l, cid)) |
0139418c MH |
182 | return cid; |
183 | } | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
189 | { | |
190 | sock_hold(sk); | |
191 | ||
192 | if (l->head) | |
193 | l2cap_pi(l->head)->prev_c = sk; | |
194 | ||
195 | l2cap_pi(sk)->next_c = l->head; | |
196 | l2cap_pi(sk)->prev_c = NULL; | |
197 | l->head = sk; | |
198 | } | |
199 | ||
200 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
201 | { | |
202 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
203 | ||
fd1278d7 | 204 | write_lock_bh(&l->lock); |
0139418c MH |
205 | if (sk == l->head) |
206 | l->head = next; | |
207 | ||
208 | if (next) | |
209 | l2cap_pi(next)->prev_c = prev; | |
210 | if (prev) | |
211 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 212 | write_unlock_bh(&l->lock); |
0139418c MH |
213 | |
214 | __sock_put(sk); | |
215 | } | |
216 | ||
217 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
218 | { | |
219 | struct l2cap_chan_list *l = &conn->chan_list; | |
220 | ||
af05b30b GP |
221 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
222 | l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
0139418c | 223 | |
2950f21a MH |
224 | conn->disc_reason = 0x13; |
225 | ||
0139418c MH |
226 | l2cap_pi(sk)->conn = conn; |
227 | ||
bd3c9e25 | 228 | if (sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) { |
0139418c MH |
229 | /* Alloc CID for connection-oriented socket */ |
230 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
231 | } else if (sk->sk_type == SOCK_DGRAM) { | |
232 | /* Connectionless socket */ | |
8db4dc46 GP |
233 | l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS; |
234 | l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS; | |
0139418c MH |
235 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
236 | } else { | |
237 | /* Raw socket can send/recv signalling messages only */ | |
8db4dc46 GP |
238 | l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING; |
239 | l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING; | |
0139418c MH |
240 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
241 | } | |
242 | ||
243 | __l2cap_chan_link(l, sk); | |
244 | ||
245 | if (parent) | |
246 | bt_accept_enqueue(parent, sk); | |
247 | } | |
248 | ||
8e87d142 | 249 | /* Delete channel. |
0139418c MH |
250 | * Must be called on the locked socket. */ |
251 | static void l2cap_chan_del(struct sock *sk, int err) | |
252 | { | |
253 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
254 | struct sock *parent = bt_sk(sk)->parent; | |
255 | ||
256 | l2cap_sock_clear_timer(sk); | |
257 | ||
258 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
259 | ||
8e87d142 | 260 | if (conn) { |
0139418c MH |
261 | /* Unlink from channel list */ |
262 | l2cap_chan_unlink(&conn->chan_list, sk); | |
263 | l2cap_pi(sk)->conn = NULL; | |
264 | hci_conn_put(conn->hcon); | |
265 | } | |
266 | ||
b1235d79 | 267 | sk->sk_state = BT_CLOSED; |
0139418c MH |
268 | sock_set_flag(sk, SOCK_ZAPPED); |
269 | ||
270 | if (err) | |
271 | sk->sk_err = err; | |
272 | ||
273 | if (parent) { | |
274 | bt_accept_unlink(sk); | |
275 | parent->sk_data_ready(parent, 0); | |
276 | } else | |
277 | sk->sk_state_change(sk); | |
c13ffa62 GP |
278 | |
279 | skb_queue_purge(TX_QUEUE(sk)); | |
280 | ||
281 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
282 | struct srej_list *l, *tmp; | |
283 | ||
284 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
285 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
286 | del_timer(&l2cap_pi(sk)->ack_timer); | |
287 | ||
288 | skb_queue_purge(SREJ_QUEUE(sk)); | |
289 | skb_queue_purge(BUSY_QUEUE(sk)); | |
290 | ||
291 | list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) { | |
292 | list_del(&l->list); | |
293 | kfree(l); | |
294 | } | |
295 | } | |
0139418c MH |
296 | } |
297 | ||
79d554a6 | 298 | /* Service level security */ |
2af6b9d5 | 299 | static inline int l2cap_check_security(struct sock *sk) |
79d554a6 MH |
300 | { |
301 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
0684e5f9 MH |
302 | __u8 auth_type; |
303 | ||
00ae4af9 MH |
304 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
305 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
306 | auth_type = HCI_AT_NO_BONDING_MITM; | |
307 | else | |
af05b30b | 308 | auth_type = HCI_AT_NO_BONDING; |
00ae4af9 MH |
309 | |
310 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
311 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
312 | } else { | |
313 | switch (l2cap_pi(sk)->sec_level) { | |
314 | case BT_SECURITY_HIGH: | |
315 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
316 | break; | |
317 | case BT_SECURITY_MEDIUM: | |
318 | auth_type = HCI_AT_GENERAL_BONDING; | |
319 | break; | |
320 | default: | |
321 | auth_type = HCI_AT_NO_BONDING; | |
322 | break; | |
323 | } | |
0684e5f9 | 324 | } |
79d554a6 | 325 | |
0684e5f9 MH |
326 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
327 | auth_type); | |
79d554a6 MH |
328 | } |
329 | ||
4e8402a3 MH |
330 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
331 | { | |
332 | u8 id; | |
333 | ||
334 | /* Get next available identificator. | |
335 | * 1 - 128 are used by kernel. | |
336 | * 129 - 199 are reserved. | |
337 | * 200 - 254 are used by utilities like l2ping, etc. | |
338 | */ | |
339 | ||
340 | spin_lock_bh(&conn->lock); | |
341 | ||
342 | if (++conn->tx_ident > 128) | |
343 | conn->tx_ident = 1; | |
344 | ||
345 | id = conn->tx_ident; | |
346 | ||
347 | spin_unlock_bh(&conn->lock); | |
348 | ||
349 | return id; | |
350 | } | |
351 | ||
9a9c6a34 | 352 | static inline void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) |
4e8402a3 MH |
353 | { |
354 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
355 | ||
356 | BT_DBG("code 0x%2.2x", code); | |
357 | ||
358 | if (!skb) | |
9a9c6a34 | 359 | return; |
4e8402a3 | 360 | |
9a9c6a34 | 361 | hci_send_acl(conn->hcon, skb, 0); |
4e8402a3 MH |
362 | } |
363 | ||
9a9c6a34 | 364 | static inline void l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control) |
1c2acffb GP |
365 | { |
366 | struct sk_buff *skb; | |
367 | struct l2cap_hdr *lh; | |
368 | struct l2cap_conn *conn = pi->conn; | |
c13ffa62 | 369 | struct sock *sk = (struct sock *)pi; |
fcc203c3 GP |
370 | int count, hlen = L2CAP_HDR_SIZE + 2; |
371 | ||
c13ffa62 GP |
372 | if (sk->sk_state != BT_CONNECTED) |
373 | return; | |
374 | ||
fcc203c3 GP |
375 | if (pi->fcs == L2CAP_FCS_CRC16) |
376 | hlen += 2; | |
1c2acffb GP |
377 | |
378 | BT_DBG("pi %p, control 0x%2.2x", pi, control); | |
379 | ||
fcc203c3 | 380 | count = min_t(unsigned int, conn->mtu, hlen); |
1c2acffb GP |
381 | control |= L2CAP_CTRL_FRAME_TYPE; |
382 | ||
9e917af1 GP |
383 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
384 | control |= L2CAP_CTRL_FINAL; | |
385 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
386 | } | |
387 | ||
f0946ccf GP |
388 | if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { |
389 | control |= L2CAP_CTRL_POLL; | |
390 | pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; | |
391 | } | |
392 | ||
1c2acffb GP |
393 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
394 | if (!skb) | |
9a9c6a34 | 395 | return; |
1c2acffb GP |
396 | |
397 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
fcc203c3 | 398 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
1c2acffb GP |
399 | lh->cid = cpu_to_le16(pi->dcid); |
400 | put_unaligned_le16(control, skb_put(skb, 2)); | |
401 | ||
fcc203c3 GP |
402 | if (pi->fcs == L2CAP_FCS_CRC16) { |
403 | u16 fcs = crc16(0, (u8 *)lh, count - 2); | |
404 | put_unaligned_le16(fcs, skb_put(skb, 2)); | |
405 | } | |
406 | ||
9a9c6a34 | 407 | hci_send_acl(pi->conn->hcon, skb, 0); |
1c2acffb GP |
408 | } |
409 | ||
9a9c6a34 | 410 | static inline void l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control) |
7e743090 | 411 | { |
1890d36b | 412 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { |
7e743090 | 413 | control |= L2CAP_SUPER_RCV_NOT_READY; |
1890d36b GP |
414 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
415 | } else | |
7e743090 GP |
416 | control |= L2CAP_SUPER_RCV_READY; |
417 | ||
2ab25cdd GP |
418 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
419 | ||
9a9c6a34 | 420 | l2cap_send_sframe(pi, control); |
7e743090 GP |
421 | } |
422 | ||
e501d055 AE |
423 | static inline int __l2cap_no_conn_pending(struct sock *sk) |
424 | { | |
425 | return !(l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND); | |
426 | } | |
427 | ||
79d554a6 MH |
428 | static void l2cap_do_start(struct sock *sk) |
429 | { | |
430 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
431 | ||
432 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
984947dc MH |
433 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
434 | return; | |
435 | ||
e501d055 | 436 | if (l2cap_check_security(sk) && __l2cap_no_conn_pending(sk)) { |
b1235d79 MH |
437 | struct l2cap_conn_req req; |
438 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
439 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 440 | |
b1235d79 | 441 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
e501d055 | 442 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
79d554a6 | 443 | |
b1235d79 | 444 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 445 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 446 | } |
79d554a6 MH |
447 | } else { |
448 | struct l2cap_info_req req; | |
449 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
450 | ||
451 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
452 | conn->info_ident = l2cap_get_ident(conn); | |
453 | ||
454 | mod_timer(&conn->info_timer, jiffies + | |
455 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
456 | ||
457 | l2cap_send_cmd(conn, conn->info_ident, | |
458 | L2CAP_INFO_REQ, sizeof(req), &req); | |
459 | } | |
460 | } | |
461 | ||
cf6c2c0b GP |
462 | static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
463 | { | |
464 | u32 local_feat_mask = l2cap_feat_mask; | |
465 | if (enable_ertm) | |
466 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; | |
467 | ||
468 | switch (mode) { | |
469 | case L2CAP_MODE_ERTM: | |
470 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; | |
471 | case L2CAP_MODE_STREAMING: | |
472 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; | |
473 | default: | |
474 | return 0x00; | |
475 | } | |
476 | } | |
477 | ||
9b108fc0 | 478 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk, int err) |
22121fc9 GP |
479 | { |
480 | struct l2cap_disconn_req req; | |
481 | ||
c13ffa62 GP |
482 | if (!conn) |
483 | return; | |
484 | ||
485 | skb_queue_purge(TX_QUEUE(sk)); | |
486 | ||
487 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
488 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
489 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
490 | del_timer(&l2cap_pi(sk)->ack_timer); | |
491 | } | |
492 | ||
22121fc9 GP |
493 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
494 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
495 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
496 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
c13ffa62 GP |
497 | |
498 | sk->sk_state = BT_DISCONN; | |
9b108fc0 | 499 | sk->sk_err = err; |
22121fc9 GP |
500 | } |
501 | ||
1da177e4 | 502 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
503 | static void l2cap_conn_start(struct l2cap_conn *conn) |
504 | { | |
505 | struct l2cap_chan_list *l = &conn->chan_list; | |
cf6c2c0b | 506 | struct sock_del_list del, *tmp1, *tmp2; |
4e8402a3 MH |
507 | struct sock *sk; |
508 | ||
509 | BT_DBG("conn %p", conn); | |
510 | ||
cf6c2c0b GP |
511 | INIT_LIST_HEAD(&del.list); |
512 | ||
4e8402a3 MH |
513 | read_lock(&l->lock); |
514 | ||
515 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
516 | bh_lock_sock(sk); | |
517 | ||
bd3c9e25 GP |
518 | if (sk->sk_type != SOCK_SEQPACKET && |
519 | sk->sk_type != SOCK_STREAM) { | |
79d554a6 MH |
520 | bh_unlock_sock(sk); |
521 | continue; | |
522 | } | |
523 | ||
524 | if (sk->sk_state == BT_CONNECT) { | |
47731de7 | 525 | struct l2cap_conn_req req; |
79d554a6 | 526 | |
47731de7 GP |
527 | if (!l2cap_check_security(sk) || |
528 | !__l2cap_no_conn_pending(sk)) { | |
529 | bh_unlock_sock(sk); | |
530 | continue; | |
531 | } | |
79d554a6 | 532 | |
47731de7 GP |
533 | if (!l2cap_mode_supported(l2cap_pi(sk)->mode, |
534 | conn->feat_mask) | |
535 | && l2cap_pi(sk)->conf_state & | |
536 | L2CAP_CONF_STATE2_DEVICE) { | |
537 | tmp1 = kzalloc(sizeof(struct sock_del_list), | |
538 | GFP_ATOMIC); | |
539 | tmp1->sk = sk; | |
540 | list_add_tail(&tmp1->list, &del.list); | |
541 | bh_unlock_sock(sk); | |
542 | continue; | |
b1235d79 | 543 | } |
47731de7 GP |
544 | |
545 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
546 | req.psm = l2cap_pi(sk)->psm; | |
547 | ||
548 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); | |
549 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; | |
550 | ||
551 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
552 | L2CAP_CONN_REQ, sizeof(req), &req); | |
553 | ||
79d554a6 MH |
554 | } else if (sk->sk_state == BT_CONNECT2) { |
555 | struct l2cap_conn_rsp rsp; | |
e9aeb2dd | 556 | char buf[128]; |
79d554a6 MH |
557 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
558 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
559 | ||
2af6b9d5 | 560 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
561 | if (bt_sk(sk)->defer_setup) { |
562 | struct sock *parent = bt_sk(sk)->parent; | |
563 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
564 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
565 | parent->sk_data_ready(parent, 0); | |
566 | ||
567 | } else { | |
568 | sk->sk_state = BT_CONFIG; | |
569 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
570 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
571 | } | |
79d554a6 MH |
572 | } else { |
573 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
574 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
575 | } | |
576 | ||
577 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
578 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
e9aeb2dd GP |
579 | |
580 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT || | |
581 | rsp.result != L2CAP_CR_SUCCESS) { | |
582 | bh_unlock_sock(sk); | |
583 | continue; | |
584 | } | |
585 | ||
586 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
587 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
588 | l2cap_build_conf_req(sk, buf), buf); | |
589 | l2cap_pi(sk)->num_conf_req++; | |
4e8402a3 MH |
590 | } |
591 | ||
592 | bh_unlock_sock(sk); | |
593 | } | |
594 | ||
595 | read_unlock(&l->lock); | |
cf6c2c0b GP |
596 | |
597 | list_for_each_entry_safe(tmp1, tmp2, &del.list, list) { | |
598 | bh_lock_sock(tmp1->sk); | |
599 | __l2cap_sock_close(tmp1->sk, ECONNRESET); | |
600 | bh_unlock_sock(tmp1->sk); | |
601 | list_del(&tmp1->list); | |
602 | kfree(tmp1); | |
603 | } | |
4e8402a3 MH |
604 | } |
605 | ||
606 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
607 | { | |
79d554a6 MH |
608 | struct l2cap_chan_list *l = &conn->chan_list; |
609 | struct sock *sk; | |
4e8402a3 | 610 | |
79d554a6 | 611 | BT_DBG("conn %p", conn); |
4e8402a3 | 612 | |
79d554a6 | 613 | read_lock(&l->lock); |
4e8402a3 | 614 | |
79d554a6 MH |
615 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
616 | bh_lock_sock(sk); | |
4e8402a3 | 617 | |
bd3c9e25 GP |
618 | if (sk->sk_type != SOCK_SEQPACKET && |
619 | sk->sk_type != SOCK_STREAM) { | |
79d554a6 MH |
620 | l2cap_sock_clear_timer(sk); |
621 | sk->sk_state = BT_CONNECTED; | |
622 | sk->sk_state_change(sk); | |
623 | } else if (sk->sk_state == BT_CONNECT) | |
624 | l2cap_do_start(sk); | |
4e8402a3 | 625 | |
79d554a6 | 626 | bh_unlock_sock(sk); |
4e8402a3 | 627 | } |
79d554a6 MH |
628 | |
629 | read_unlock(&l->lock); | |
4e8402a3 MH |
630 | } |
631 | ||
632 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
633 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
634 | { | |
635 | struct l2cap_chan_list *l = &conn->chan_list; | |
636 | struct sock *sk; | |
637 | ||
638 | BT_DBG("conn %p", conn); | |
639 | ||
640 | read_lock(&l->lock); | |
641 | ||
642 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 643 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
644 | sk->sk_err = err; |
645 | } | |
646 | ||
647 | read_unlock(&l->lock); | |
648 | } | |
649 | ||
650 | static void l2cap_info_timeout(unsigned long arg) | |
651 | { | |
652 | struct l2cap_conn *conn = (void *) arg; | |
653 | ||
984947dc | 654 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 655 | conn->info_ident = 0; |
984947dc | 656 | |
4e8402a3 MH |
657 | l2cap_conn_start(conn); |
658 | } | |
659 | ||
1da177e4 LT |
660 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
661 | { | |
0139418c | 662 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 663 | |
0139418c | 664 | if (conn || status) |
1da177e4 LT |
665 | return conn; |
666 | ||
0139418c MH |
667 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
668 | if (!conn) | |
1da177e4 | 669 | return NULL; |
1da177e4 LT |
670 | |
671 | hcon->l2cap_data = conn; | |
672 | conn->hcon = hcon; | |
673 | ||
0139418c MH |
674 | BT_DBG("hcon %p conn %p", hcon, conn); |
675 | ||
1da177e4 LT |
676 | conn->mtu = hcon->hdev->acl_mtu; |
677 | conn->src = &hcon->hdev->bdaddr; | |
678 | conn->dst = &hcon->dst; | |
679 | ||
4e8402a3 MH |
680 | conn->feat_mask = 0; |
681 | ||
1da177e4 LT |
682 | spin_lock_init(&conn->lock); |
683 | rwlock_init(&conn->chan_list.lock); | |
684 | ||
45054dc1 DY |
685 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
686 | (unsigned long) conn); | |
687 | ||
2950f21a MH |
688 | conn->disc_reason = 0x13; |
689 | ||
1da177e4 LT |
690 | return conn; |
691 | } | |
692 | ||
0139418c | 693 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 694 | { |
0139418c | 695 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
696 | struct sock *sk; |
697 | ||
0139418c MH |
698 | if (!conn) |
699 | return; | |
1da177e4 LT |
700 | |
701 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
702 | ||
7585b97a | 703 | kfree_skb(conn->rx_skb); |
1da177e4 LT |
704 | |
705 | /* Kill channels */ | |
706 | while ((sk = conn->chan_list.head)) { | |
707 | bh_lock_sock(sk); | |
708 | l2cap_chan_del(sk, err); | |
709 | bh_unlock_sock(sk); | |
710 | l2cap_sock_kill(sk); | |
711 | } | |
712 | ||
8e8440f5 DY |
713 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
714 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 715 | |
1da177e4 LT |
716 | hcon->l2cap_data = NULL; |
717 | kfree(conn); | |
1da177e4 LT |
718 | } |
719 | ||
720 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
721 | { | |
722 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 723 | write_lock_bh(&l->lock); |
1da177e4 | 724 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 725 | write_unlock_bh(&l->lock); |
1da177e4 LT |
726 | } |
727 | ||
1da177e4 | 728 | /* ---- Socket interface ---- */ |
8e036fc3 | 729 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
730 | { |
731 | struct sock *sk; | |
732 | struct hlist_node *node; | |
733 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
734 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
735 | goto found; | |
736 | sk = NULL; | |
737 | found: | |
738 | return sk; | |
739 | } | |
740 | ||
741 | /* Find socket with psm and source bdaddr. | |
742 | * Returns closest match. | |
743 | */ | |
8e036fc3 | 744 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
745 | { |
746 | struct sock *sk = NULL, *sk1 = NULL; | |
747 | struct hlist_node *node; | |
748 | ||
749 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
750 | if (state && sk->sk_state != state) | |
751 | continue; | |
752 | ||
753 | if (l2cap_pi(sk)->psm == psm) { | |
754 | /* Exact match. */ | |
755 | if (!bacmp(&bt_sk(sk)->src, src)) | |
756 | break; | |
757 | ||
758 | /* Closest match */ | |
759 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
760 | sk1 = sk; | |
761 | } | |
762 | } | |
763 | return node ? sk : sk1; | |
764 | } | |
765 | ||
766 | /* Find socket with given address (psm, src). | |
767 | * Returns locked socket */ | |
8e036fc3 | 768 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
769 | { |
770 | struct sock *s; | |
771 | read_lock(&l2cap_sk_list.lock); | |
772 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
af05b30b GP |
773 | if (s) |
774 | bh_lock_sock(s); | |
1da177e4 LT |
775 | read_unlock(&l2cap_sk_list.lock); |
776 | return s; | |
777 | } | |
778 | ||
779 | static void l2cap_sock_destruct(struct sock *sk) | |
780 | { | |
781 | BT_DBG("sk %p", sk); | |
782 | ||
783 | skb_queue_purge(&sk->sk_receive_queue); | |
784 | skb_queue_purge(&sk->sk_write_queue); | |
785 | } | |
786 | ||
787 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
788 | { | |
789 | struct sock *sk; | |
790 | ||
791 | BT_DBG("parent %p", parent); | |
792 | ||
793 | /* Close not yet accepted channels */ | |
794 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
795 | l2cap_sock_close(sk); | |
796 | ||
b1235d79 | 797 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
798 | sock_set_flag(parent, SOCK_ZAPPED); |
799 | } | |
800 | ||
801 | /* Kill socket (only if zapped and orphan) | |
802 | * Must be called on unlocked socket. | |
803 | */ | |
804 | static void l2cap_sock_kill(struct sock *sk) | |
805 | { | |
806 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
807 | return; | |
808 | ||
809 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
810 | ||
811 | /* Kill poor orphan */ | |
812 | bt_sock_unlink(&l2cap_sk_list, sk); | |
813 | sock_set_flag(sk, SOCK_DEAD); | |
814 | sock_put(sk); | |
815 | } | |
816 | ||
817 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
818 | { | |
819 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
820 | ||
821 | switch (sk->sk_state) { | |
822 | case BT_LISTEN: | |
823 | l2cap_sock_cleanup_listen(sk); | |
824 | break; | |
825 | ||
826 | case BT_CONNECTED: | |
827 | case BT_CONFIG: | |
bd3c9e25 GP |
828 | if (sk->sk_type == SOCK_SEQPACKET || |
829 | sk->sk_type == SOCK_STREAM) { | |
1da177e4 | 830 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
1da177e4 | 831 | |
1da177e4 | 832 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
9b108fc0 | 833 | l2cap_send_disconn_req(conn, sk, reason); |
b1235d79 | 834 | } else |
1da177e4 | 835 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
836 | break; |
837 | ||
f66dc81f | 838 | case BT_CONNECT2: |
bd3c9e25 GP |
839 | if (sk->sk_type == SOCK_SEQPACKET || |
840 | sk->sk_type == SOCK_STREAM) { | |
f66dc81f MH |
841 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
842 | struct l2cap_conn_rsp rsp; | |
843 | __u16 result; | |
844 | ||
845 | if (bt_sk(sk)->defer_setup) | |
846 | result = L2CAP_CR_SEC_BLOCK; | |
847 | else | |
848 | result = L2CAP_CR_BAD_PSM; | |
849 | ||
850 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
851 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
852 | rsp.result = cpu_to_le16(result); | |
853 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
854 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
855 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
856 | } else | |
857 | l2cap_chan_del(sk, reason); | |
858 | break; | |
859 | ||
1da177e4 LT |
860 | case BT_CONNECT: |
861 | case BT_DISCONN: | |
862 | l2cap_chan_del(sk, reason); | |
863 | break; | |
864 | ||
865 | default: | |
866 | sock_set_flag(sk, SOCK_ZAPPED); | |
867 | break; | |
868 | } | |
869 | } | |
870 | ||
871 | /* Must be called on unlocked socket. */ | |
872 | static void l2cap_sock_close(struct sock *sk) | |
873 | { | |
874 | l2cap_sock_clear_timer(sk); | |
875 | lock_sock(sk); | |
876 | __l2cap_sock_close(sk, ECONNRESET); | |
877 | release_sock(sk); | |
878 | l2cap_sock_kill(sk); | |
879 | } | |
880 | ||
881 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
882 | { | |
883 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
884 | ||
885 | BT_DBG("sk %p", sk); | |
886 | ||
887 | if (parent) { | |
888 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
889 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
890 | ||
1da177e4 LT |
891 | pi->imtu = l2cap_pi(parent)->imtu; |
892 | pi->omtu = l2cap_pi(parent)->omtu; | |
85eb53c6 | 893 | pi->conf_state = l2cap_pi(parent)->conf_state; |
c6b03cf9 MH |
894 | pi->mode = l2cap_pi(parent)->mode; |
895 | pi->fcs = l2cap_pi(parent)->fcs; | |
68d7f0ce | 896 | pi->max_tx = l2cap_pi(parent)->max_tx; |
14b5aa71 | 897 | pi->tx_win = l2cap_pi(parent)->tx_win; |
2af6b9d5 MH |
898 | pi->sec_level = l2cap_pi(parent)->sec_level; |
899 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
900 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
901 | } else { |
902 | pi->imtu = L2CAP_DEFAULT_MTU; | |
903 | pi->omtu = 0; | |
85eb53c6 | 904 | if (enable_ertm && sk->sk_type == SOCK_STREAM) { |
bd3c9e25 | 905 | pi->mode = L2CAP_MODE_ERTM; |
85eb53c6 GP |
906 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
907 | } else { | |
bd3c9e25 | 908 | pi->mode = L2CAP_MODE_BASIC; |
85eb53c6 | 909 | } |
fd059b9b | 910 | pi->max_tx = L2CAP_DEFAULT_MAX_TX; |
c6b03cf9 | 911 | pi->fcs = L2CAP_FCS_CRC16; |
fd059b9b | 912 | pi->tx_win = L2CAP_DEFAULT_TX_WINDOW; |
2af6b9d5 MH |
913 | pi->sec_level = BT_SECURITY_LOW; |
914 | pi->role_switch = 0; | |
915 | pi->force_reliable = 0; | |
1da177e4 LT |
916 | } |
917 | ||
918 | /* Default config options */ | |
5dee9e7c | 919 | pi->conf_len = 0; |
1da177e4 | 920 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
45054dc1 DY |
921 | skb_queue_head_init(TX_QUEUE(sk)); |
922 | skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b | 923 | skb_queue_head_init(BUSY_QUEUE(sk)); |
45054dc1 | 924 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
1da177e4 LT |
925 | } |
926 | ||
927 | static struct proto l2cap_proto = { | |
928 | .name = "L2CAP", | |
929 | .owner = THIS_MODULE, | |
930 | .obj_size = sizeof(struct l2cap_pinfo) | |
931 | }; | |
932 | ||
1b8d7ae4 | 933 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
934 | { |
935 | struct sock *sk; | |
936 | ||
6257ff21 | 937 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
938 | if (!sk) |
939 | return NULL; | |
940 | ||
941 | sock_init_data(sock, sk); | |
942 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
943 | ||
944 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 945 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
946 | |
947 | sock_reset_flag(sk, SOCK_ZAPPED); | |
948 | ||
949 | sk->sk_protocol = proto; | |
b1235d79 | 950 | sk->sk_state = BT_OPEN; |
1da177e4 | 951 | |
b1235d79 | 952 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
953 | |
954 | bt_sock_link(&l2cap_sk_list, sk); | |
955 | return sk; | |
956 | } | |
957 | ||
3f378b68 EP |
958 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, |
959 | int kern) | |
1da177e4 LT |
960 | { |
961 | struct sock *sk; | |
962 | ||
963 | BT_DBG("sock %p", sock); | |
964 | ||
965 | sock->state = SS_UNCONNECTED; | |
966 | ||
bd3c9e25 | 967 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && |
1da177e4 LT |
968 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
969 | return -ESOCKTNOSUPPORT; | |
970 | ||
c84b3268 | 971 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
1da177e4 LT |
972 | return -EPERM; |
973 | ||
974 | sock->ops = &l2cap_sock_ops; | |
975 | ||
1b8d7ae4 | 976 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
977 | if (!sk) |
978 | return -ENOMEM; | |
979 | ||
980 | l2cap_sock_init(sk, NULL); | |
981 | return 0; | |
982 | } | |
983 | ||
f29972de | 984 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
1da177e4 | 985 | { |
1da177e4 | 986 | struct sock *sk = sock->sk; |
f29972de MH |
987 | struct sockaddr_l2 la; |
988 | int len, err = 0; | |
1da177e4 | 989 | |
f29972de | 990 | BT_DBG("sk %p", sk); |
1da177e4 LT |
991 | |
992 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
993 | return -EINVAL; | |
994 | ||
f29972de MH |
995 | memset(&la, 0, sizeof(la)); |
996 | len = min_t(unsigned int, sizeof(la), alen); | |
997 | memcpy(&la, addr, len); | |
998 | ||
2a517ca6 MH |
999 | if (la.l2_cid) |
1000 | return -EINVAL; | |
1001 | ||
1da177e4 LT |
1002 | lock_sock(sk); |
1003 | ||
1004 | if (sk->sk_state != BT_OPEN) { | |
1005 | err = -EBADFD; | |
1006 | goto done; | |
1007 | } | |
1008 | ||
b4324b5d | 1009 | if (la.l2_psm && __le16_to_cpu(la.l2_psm) < 0x1001 && |
847641d7 MH |
1010 | !capable(CAP_NET_BIND_SERVICE)) { |
1011 | err = -EACCES; | |
1012 | goto done; | |
1013 | } | |
8e87d142 | 1014 | |
1da177e4 LT |
1015 | write_lock_bh(&l2cap_sk_list.lock); |
1016 | ||
f29972de | 1017 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
1da177e4 LT |
1018 | err = -EADDRINUSE; |
1019 | } else { | |
1020 | /* Save source address */ | |
f29972de MH |
1021 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
1022 | l2cap_pi(sk)->psm = la.l2_psm; | |
1023 | l2cap_pi(sk)->sport = la.l2_psm; | |
1da177e4 | 1024 | sk->sk_state = BT_BOUND; |
2af6b9d5 | 1025 | |
b4324b5d MH |
1026 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
1027 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
2af6b9d5 | 1028 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
1da177e4 LT |
1029 | } |
1030 | ||
1031 | write_unlock_bh(&l2cap_sk_list.lock); | |
1032 | ||
1033 | done: | |
1034 | release_sock(sk); | |
1035 | return err; | |
1036 | } | |
1037 | ||
1038 | static int l2cap_do_connect(struct sock *sk) | |
1039 | { | |
1040 | bdaddr_t *src = &bt_sk(sk)->src; | |
1041 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
1042 | struct l2cap_conn *conn; | |
1043 | struct hci_conn *hcon; | |
1044 | struct hci_dev *hdev; | |
09ab6f4c | 1045 | __u8 auth_type; |
44d0e48e | 1046 | int err; |
1da177e4 | 1047 | |
f29972de MH |
1048 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
1049 | l2cap_pi(sk)->psm); | |
1da177e4 | 1050 | |
af05b30b GP |
1051 | hdev = hci_get_route(dst, src); |
1052 | if (!hdev) | |
1da177e4 LT |
1053 | return -EHOSTUNREACH; |
1054 | ||
1055 | hci_dev_lock_bh(hdev); | |
1056 | ||
1057 | err = -ENOMEM; | |
1058 | ||
8c1b2355 | 1059 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
1060 | switch (l2cap_pi(sk)->sec_level) { |
1061 | case BT_SECURITY_HIGH: | |
8c1b2355 | 1062 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
1063 | break; |
1064 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 1065 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
1066 | break; |
1067 | default: | |
09ab6f4c | 1068 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
1069 | break; |
1070 | } | |
8c1b2355 | 1071 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 1072 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 1073 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 1074 | else |
8c1b2355 | 1075 | auth_type = HCI_AT_NO_BONDING; |
435fef20 MH |
1076 | |
1077 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
1078 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
8c1b2355 | 1079 | } else { |
2af6b9d5 MH |
1080 | switch (l2cap_pi(sk)->sec_level) { |
1081 | case BT_SECURITY_HIGH: | |
8c1b2355 | 1082 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
1083 | break; |
1084 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 1085 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
1086 | break; |
1087 | default: | |
8c1b2355 | 1088 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
1089 | break; |
1090 | } | |
09ab6f4c MH |
1091 | } |
1092 | ||
2af6b9d5 MH |
1093 | hcon = hci_connect(hdev, ACL_LINK, dst, |
1094 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
1095 | if (!hcon) |
1096 | goto done; | |
1097 | ||
1098 | conn = l2cap_conn_add(hcon, 0); | |
1099 | if (!conn) { | |
1100 | hci_conn_put(hcon); | |
1101 | goto done; | |
1102 | } | |
1103 | ||
1104 | err = 0; | |
1105 | ||
1106 | /* Update source addr of the socket */ | |
1107 | bacpy(src, conn->src); | |
1108 | ||
1109 | l2cap_chan_add(conn, sk, NULL); | |
1110 | ||
1111 | sk->sk_state = BT_CONNECT; | |
1112 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1113 | ||
1114 | if (hcon->state == BT_CONNECTED) { | |
bd3c9e25 GP |
1115 | if (sk->sk_type != SOCK_SEQPACKET && |
1116 | sk->sk_type != SOCK_STREAM) { | |
1da177e4 LT |
1117 | l2cap_sock_clear_timer(sk); |
1118 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
1119 | } else |
1120 | l2cap_do_start(sk); | |
1da177e4 LT |
1121 | } |
1122 | ||
1123 | done: | |
1124 | hci_dev_unlock_bh(hdev); | |
1125 | hci_dev_put(hdev); | |
1126 | return err; | |
1127 | } | |
1128 | ||
1129 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
1130 | { | |
1da177e4 | 1131 | struct sock *sk = sock->sk; |
f29972de MH |
1132 | struct sockaddr_l2 la; |
1133 | int len, err = 0; | |
1da177e4 | 1134 | |
1da177e4 LT |
1135 | BT_DBG("sk %p", sk); |
1136 | ||
6503d961 CG |
1137 | if (!addr || alen < sizeof(addr->sa_family) || |
1138 | addr->sa_family != AF_BLUETOOTH) | |
2a517ca6 | 1139 | return -EINVAL; |
1da177e4 | 1140 | |
f29972de MH |
1141 | memset(&la, 0, sizeof(la)); |
1142 | len = min_t(unsigned int, sizeof(la), alen); | |
1143 | memcpy(&la, addr, len); | |
1144 | ||
2a517ca6 MH |
1145 | if (la.l2_cid) |
1146 | return -EINVAL; | |
1147 | ||
1148 | lock_sock(sk); | |
1149 | ||
bd3c9e25 GP |
1150 | if ((sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) |
1151 | && !la.l2_psm) { | |
1da177e4 LT |
1152 | err = -EINVAL; |
1153 | goto done; | |
1154 | } | |
1155 | ||
c6b03cf9 MH |
1156 | switch (l2cap_pi(sk)->mode) { |
1157 | case L2CAP_MODE_BASIC: | |
1158 | break; | |
1159 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1160 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1161 | if (enable_ertm) |
1162 | break; | |
1163 | /* fall through */ | |
1164 | default: | |
1165 | err = -ENOTSUPP; | |
1166 | goto done; | |
1167 | } | |
1168 | ||
af05b30b | 1169 | switch (sk->sk_state) { |
1da177e4 LT |
1170 | case BT_CONNECT: |
1171 | case BT_CONNECT2: | |
1172 | case BT_CONFIG: | |
1173 | /* Already connecting */ | |
1174 | goto wait; | |
1175 | ||
1176 | case BT_CONNECTED: | |
1177 | /* Already connected */ | |
8b0dc6dc | 1178 | err = -EISCONN; |
1da177e4 LT |
1179 | goto done; |
1180 | ||
1181 | case BT_OPEN: | |
1182 | case BT_BOUND: | |
1183 | /* Can connect */ | |
1184 | break; | |
1185 | ||
1186 | default: | |
1187 | err = -EBADFD; | |
1188 | goto done; | |
1189 | } | |
1190 | ||
1191 | /* Set destination address and psm */ | |
f29972de MH |
1192 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
1193 | l2cap_pi(sk)->psm = la.l2_psm; | |
1da177e4 | 1194 | |
af05b30b GP |
1195 | err = l2cap_do_connect(sk); |
1196 | if (err) | |
1da177e4 LT |
1197 | goto done; |
1198 | ||
1199 | wait: | |
1200 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
1201 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
1202 | done: | |
1203 | release_sock(sk); | |
1204 | return err; | |
1205 | } | |
1206 | ||
1207 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
1208 | { | |
1209 | struct sock *sk = sock->sk; | |
1210 | int err = 0; | |
1211 | ||
1212 | BT_DBG("sk %p backlog %d", sk, backlog); | |
1213 | ||
1214 | lock_sock(sk); | |
1215 | ||
bd3c9e25 GP |
1216 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) |
1217 | || sk->sk_state != BT_BOUND) { | |
1da177e4 LT |
1218 | err = -EBADFD; |
1219 | goto done; | |
1220 | } | |
1221 | ||
c6b03cf9 MH |
1222 | switch (l2cap_pi(sk)->mode) { |
1223 | case L2CAP_MODE_BASIC: | |
1224 | break; | |
1225 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1226 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1227 | if (enable_ertm) |
1228 | break; | |
1229 | /* fall through */ | |
1230 | default: | |
1231 | err = -ENOTSUPP; | |
1232 | goto done; | |
1233 | } | |
1234 | ||
1da177e4 LT |
1235 | if (!l2cap_pi(sk)->psm) { |
1236 | bdaddr_t *src = &bt_sk(sk)->src; | |
1237 | u16 psm; | |
1238 | ||
1239 | err = -EINVAL; | |
1240 | ||
1241 | write_lock_bh(&l2cap_sk_list.lock); | |
1242 | ||
1243 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
b4324b5d MH |
1244 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
1245 | l2cap_pi(sk)->psm = cpu_to_le16(psm); | |
1246 | l2cap_pi(sk)->sport = cpu_to_le16(psm); | |
1da177e4 LT |
1247 | err = 0; |
1248 | break; | |
1249 | } | |
1250 | ||
1251 | write_unlock_bh(&l2cap_sk_list.lock); | |
1252 | ||
1253 | if (err < 0) | |
1254 | goto done; | |
1255 | } | |
1256 | ||
1257 | sk->sk_max_ack_backlog = backlog; | |
1258 | sk->sk_ack_backlog = 0; | |
1259 | sk->sk_state = BT_LISTEN; | |
1260 | ||
1261 | done: | |
1262 | release_sock(sk); | |
1263 | return err; | |
1264 | } | |
1265 | ||
1266 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
1267 | { | |
1268 | DECLARE_WAITQUEUE(wait, current); | |
1269 | struct sock *sk = sock->sk, *nsk; | |
1270 | long timeo; | |
1271 | int err = 0; | |
1272 | ||
fcc70d5f | 1273 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1274 | |
1275 | if (sk->sk_state != BT_LISTEN) { | |
1276 | err = -EBADFD; | |
1277 | goto done; | |
1278 | } | |
1279 | ||
1280 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1281 | ||
1282 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1283 | ||
1284 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 1285 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
1da177e4 LT |
1286 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { |
1287 | set_current_state(TASK_INTERRUPTIBLE); | |
1288 | if (!timeo) { | |
1289 | err = -EAGAIN; | |
1290 | break; | |
1291 | } | |
1292 | ||
1293 | release_sock(sk); | |
1294 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1295 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1296 | |
1297 | if (sk->sk_state != BT_LISTEN) { | |
1298 | err = -EBADFD; | |
1299 | break; | |
1300 | } | |
1301 | ||
1302 | if (signal_pending(current)) { | |
1303 | err = sock_intr_errno(timeo); | |
1304 | break; | |
1305 | } | |
1306 | } | |
1307 | set_current_state(TASK_RUNNING); | |
aa395145 | 1308 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
1309 | |
1310 | if (err) | |
1311 | goto done; | |
1312 | ||
1313 | newsock->state = SS_CONNECTED; | |
1314 | ||
1315 | BT_DBG("new socket %p", nsk); | |
1316 | ||
1317 | done: | |
1318 | release_sock(sk); | |
1319 | return err; | |
1320 | } | |
1321 | ||
1322 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1323 | { | |
1324 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1325 | struct sock *sk = sock->sk; | |
1326 | ||
1327 | BT_DBG("sock %p, sk %p", sock, sk); | |
1328 | ||
1329 | addr->sa_family = AF_BLUETOOTH; | |
1330 | *len = sizeof(struct sockaddr_l2); | |
1331 | ||
f29972de MH |
1332 | if (peer) { |
1333 | la->l2_psm = l2cap_pi(sk)->psm; | |
1da177e4 | 1334 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
b4324b5d | 1335 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
f29972de MH |
1336 | } else { |
1337 | la->l2_psm = l2cap_pi(sk)->sport; | |
1da177e4 | 1338 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
b4324b5d | 1339 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
f29972de | 1340 | } |
1da177e4 | 1341 | |
1da177e4 LT |
1342 | return 0; |
1343 | } | |
1344 | ||
6161c038 GP |
1345 | static int __l2cap_wait_ack(struct sock *sk) |
1346 | { | |
1347 | DECLARE_WAITQUEUE(wait, current); | |
1348 | int err = 0; | |
1349 | int timeo = HZ/5; | |
1350 | ||
2b0b05dd | 1351 | add_wait_queue(sk_sleep(sk), &wait); |
6161c038 GP |
1352 | while ((l2cap_pi(sk)->unacked_frames > 0 && l2cap_pi(sk)->conn)) { |
1353 | set_current_state(TASK_INTERRUPTIBLE); | |
1354 | ||
1355 | if (!timeo) | |
1356 | timeo = HZ/5; | |
1357 | ||
1358 | if (signal_pending(current)) { | |
1359 | err = sock_intr_errno(timeo); | |
1360 | break; | |
1361 | } | |
1362 | ||
1363 | release_sock(sk); | |
1364 | timeo = schedule_timeout(timeo); | |
1365 | lock_sock(sk); | |
1366 | ||
1367 | err = sock_error(sk); | |
1368 | if (err) | |
1369 | break; | |
1370 | } | |
1371 | set_current_state(TASK_RUNNING); | |
2b0b05dd | 1372 | remove_wait_queue(sk_sleep(sk), &wait); |
6161c038 GP |
1373 | return err; |
1374 | } | |
1375 | ||
e90bac06 GP |
1376 | static void l2cap_monitor_timeout(unsigned long arg) |
1377 | { | |
1378 | struct sock *sk = (void *) arg; | |
e90bac06 | 1379 | |
0e98958d GP |
1380 | BT_DBG("sk %p", sk); |
1381 | ||
e686219a | 1382 | bh_lock_sock(sk); |
e90bac06 | 1383 | if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { |
9b108fc0 | 1384 | l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk, ECONNABORTED); |
b13f5860 | 1385 | bh_unlock_sock(sk); |
e90bac06 GP |
1386 | return; |
1387 | } | |
1388 | ||
1389 | l2cap_pi(sk)->retry_count++; | |
1390 | __mod_monitor_timer(); | |
1391 | ||
a2e12a2a | 1392 | l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL); |
e686219a | 1393 | bh_unlock_sock(sk); |
e90bac06 GP |
1394 | } |
1395 | ||
1396 | static void l2cap_retrans_timeout(unsigned long arg) | |
1397 | { | |
1398 | struct sock *sk = (void *) arg; | |
e90bac06 | 1399 | |
0e98958d GP |
1400 | BT_DBG("sk %p", sk); |
1401 | ||
e686219a | 1402 | bh_lock_sock(sk); |
e90bac06 GP |
1403 | l2cap_pi(sk)->retry_count = 1; |
1404 | __mod_monitor_timer(); | |
1405 | ||
1406 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
1407 | ||
a2e12a2a | 1408 | l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL); |
e686219a | 1409 | bh_unlock_sock(sk); |
e90bac06 GP |
1410 | } |
1411 | ||
1c2acffb | 1412 | static void l2cap_drop_acked_frames(struct sock *sk) |
1da177e4 | 1413 | { |
1c2acffb | 1414 | struct sk_buff *skb; |
1da177e4 | 1415 | |
812e737e GP |
1416 | while ((skb = skb_peek(TX_QUEUE(sk))) && |
1417 | l2cap_pi(sk)->unacked_frames) { | |
1c2acffb GP |
1418 | if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq) |
1419 | break; | |
1da177e4 | 1420 | |
1c2acffb GP |
1421 | skb = skb_dequeue(TX_QUEUE(sk)); |
1422 | kfree_skb(skb); | |
1da177e4 | 1423 | |
1c2acffb GP |
1424 | l2cap_pi(sk)->unacked_frames--; |
1425 | } | |
1da177e4 | 1426 | |
e90bac06 GP |
1427 | if (!l2cap_pi(sk)->unacked_frames) |
1428 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
1c2acffb | 1429 | } |
1da177e4 | 1430 | |
9a9c6a34 | 1431 | static inline void l2cap_do_send(struct sock *sk, struct sk_buff *skb) |
1c2acffb GP |
1432 | { |
1433 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1c2acffb GP |
1434 | |
1435 | BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len); | |
1da177e4 | 1436 | |
9a9c6a34 | 1437 | hci_send_acl(pi->conn->hcon, skb, 0); |
1c2acffb GP |
1438 | } |
1439 | ||
305682e8 | 1440 | static void l2cap_streaming_send(struct sock *sk) |
6840ed07 GP |
1441 | { |
1442 | struct sk_buff *skb, *tx_skb; | |
1443 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1444 | u16 control, fcs; |
6840ed07 GP |
1445 | |
1446 | while ((skb = sk->sk_send_head)) { | |
1447 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1448 | ||
1449 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
1450 | control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; | |
1451 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1452 | ||
e8235c6b | 1453 | if (pi->fcs == L2CAP_FCS_CRC16) { |
fcc203c3 GP |
1454 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); |
1455 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1456 | } | |
1457 | ||
9a9c6a34 | 1458 | l2cap_do_send(sk, tx_skb); |
6840ed07 GP |
1459 | |
1460 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1461 | ||
1462 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1463 | sk->sk_send_head = NULL; | |
1464 | else | |
1465 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
1466 | ||
1467 | skb = skb_dequeue(TX_QUEUE(sk)); | |
1468 | kfree_skb(skb); | |
1469 | } | |
6840ed07 GP |
1470 | } |
1471 | ||
dfc909be | 1472 | static void l2cap_retransmit_one_frame(struct sock *sk, u8 tx_seq) |
8f17154f GP |
1473 | { |
1474 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1475 | struct sk_buff *skb, *tx_skb; | |
1476 | u16 control, fcs; | |
8f17154f GP |
1477 | |
1478 | skb = skb_peek(TX_QUEUE(sk)); | |
f11d676d GP |
1479 | if (!skb) |
1480 | return; | |
8f17154f | 1481 | |
f11d676d GP |
1482 | do { |
1483 | if (bt_cb(skb)->tx_seq == tx_seq) | |
8f17154f | 1484 | break; |
8f17154f | 1485 | |
f11d676d GP |
1486 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
1487 | return; | |
8f17154f | 1488 | |
f11d676d | 1489 | } while ((skb = skb_queue_next(TX_QUEUE(sk), skb))); |
8f17154f | 1490 | |
f11d676d GP |
1491 | if (pi->remote_max_tx && |
1492 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
9b108fc0 | 1493 | l2cap_send_disconn_req(pi->conn, sk, ECONNABORTED); |
f11d676d GP |
1494 | return; |
1495 | } | |
1496 | ||
1497 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1498 | bt_cb(skb)->retries++; | |
1499 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
3cb123d1 GP |
1500 | |
1501 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { | |
1502 | control |= L2CAP_CTRL_FINAL; | |
1503 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
1504 | } | |
95ffa978 | 1505 | |
f11d676d GP |
1506 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
1507 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); | |
3cb123d1 | 1508 | |
f11d676d GP |
1509 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
1510 | ||
1511 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
1512 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1513 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1514 | } | |
1515 | ||
1516 | l2cap_do_send(sk, tx_skb); | |
8f17154f GP |
1517 | } |
1518 | ||
1c2acffb GP |
1519 | static int l2cap_ertm_send(struct sock *sk) |
1520 | { | |
1521 | struct sk_buff *skb, *tx_skb; | |
1522 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1523 | u16 control, fcs; |
9a9c6a34 | 1524 | int nsent = 0; |
1c2acffb | 1525 | |
c13ffa62 GP |
1526 | if (sk->sk_state != BT_CONNECTED) |
1527 | return -ENOTCONN; | |
e90bac06 | 1528 | |
6e2b6722 | 1529 | while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk))) { |
1c2acffb | 1530 | |
e90bac06 GP |
1531 | if (pi->remote_max_tx && |
1532 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
9b108fc0 | 1533 | l2cap_send_disconn_req(pi->conn, sk, ECONNABORTED); |
e90bac06 GP |
1534 | break; |
1535 | } | |
1536 | ||
e420aba3 AE |
1537 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
1538 | ||
e90bac06 GP |
1539 | bt_cb(skb)->retries++; |
1540 | ||
1c2acffb | 1541 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
95ffa978 GP |
1542 | control &= L2CAP_CTRL_SAR; |
1543 | ||
d5392c8f GP |
1544 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
1545 | control |= L2CAP_CTRL_FINAL; | |
1546 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
1547 | } | |
9f121a5a | 1548 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
1c2acffb GP |
1549 | | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
1550 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1551 | ||
e90bac06 | 1552 | |
e8235c6b | 1553 | if (pi->fcs == L2CAP_FCS_CRC16) { |
fcc203c3 GP |
1554 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); |
1555 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); | |
1556 | } | |
1557 | ||
9a9c6a34 GP |
1558 | l2cap_do_send(sk, tx_skb); |
1559 | ||
e90bac06 | 1560 | __mod_retrans_timer(); |
1c2acffb GP |
1561 | |
1562 | bt_cb(skb)->tx_seq = pi->next_tx_seq; | |
1563 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1564 | ||
1565 | pi->unacked_frames++; | |
d5392c8f | 1566 | pi->frames_sent++; |
1c2acffb GP |
1567 | |
1568 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1569 | sk->sk_send_head = NULL; | |
1570 | else | |
1571 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
9e917af1 GP |
1572 | |
1573 | nsent++; | |
1c2acffb GP |
1574 | } |
1575 | ||
9e917af1 GP |
1576 | return nsent; |
1577 | } | |
1578 | ||
dfc909be GP |
1579 | static int l2cap_retransmit_frames(struct sock *sk) |
1580 | { | |
1581 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1582 | int ret; | |
1583 | ||
dfc909be GP |
1584 | if (!skb_queue_empty(TX_QUEUE(sk))) |
1585 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
1586 | ||
1587 | pi->next_tx_seq = pi->expected_ack_seq; | |
1588 | ret = l2cap_ertm_send(sk); | |
dfc909be GP |
1589 | return ret; |
1590 | } | |
1591 | ||
9a9c6a34 | 1592 | static void l2cap_send_ack(struct l2cap_pinfo *pi) |
9e917af1 GP |
1593 | { |
1594 | struct sock *sk = (struct sock *)pi; | |
1595 | u16 control = 0; | |
1596 | ||
1597 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
1598 | ||
1599 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
1600 | control |= L2CAP_SUPER_RCV_NOT_READY; | |
1890d36b | 1601 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
9a9c6a34 GP |
1602 | l2cap_send_sframe(pi, control); |
1603 | return; | |
9e917af1 | 1604 | } |
dfc909be | 1605 | |
e0f66218 | 1606 | if (l2cap_ertm_send(sk) > 0) |
dfc909be GP |
1607 | return; |
1608 | ||
1609 | control |= L2CAP_SUPER_RCV_READY; | |
1610 | l2cap_send_sframe(pi, control); | |
1c2acffb GP |
1611 | } |
1612 | ||
9a9c6a34 | 1613 | static void l2cap_send_srejtail(struct sock *sk) |
99b0d4b7 GP |
1614 | { |
1615 | struct srej_list *tail; | |
1616 | u16 control; | |
1617 | ||
1618 | control = L2CAP_SUPER_SELECT_REJECT; | |
1619 | control |= L2CAP_CTRL_FINAL; | |
1620 | ||
1621 | tail = list_entry(SREJ_LIST(sk)->prev, struct srej_list, list); | |
1622 | control |= tail->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
1623 | ||
1624 | l2cap_send_sframe(l2cap_pi(sk), control); | |
99b0d4b7 GP |
1625 | } |
1626 | ||
1c2acffb GP |
1627 | static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb) |
1628 | { | |
1629 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1630 | struct sk_buff **frag; | |
1631 | int err, sent = 0; | |
1da177e4 | 1632 | |
59203a21 | 1633 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
1c2acffb | 1634 | return -EFAULT; |
1da177e4 LT |
1635 | |
1636 | sent += count; | |
1637 | len -= count; | |
1638 | ||
1639 | /* Continuation fragments (no L2CAP header) */ | |
1640 | frag = &skb_shinfo(skb)->frag_list; | |
1641 | while (len) { | |
1642 | count = min_t(unsigned int, conn->mtu, len); | |
1643 | ||
1644 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1645 | if (!*frag) | |
1c2acffb GP |
1646 | return -EFAULT; |
1647 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) | |
1648 | return -EFAULT; | |
1da177e4 LT |
1649 | |
1650 | sent += count; | |
1651 | len -= count; | |
1652 | ||
1653 | frag = &(*frag)->next; | |
1654 | } | |
1da177e4 LT |
1655 | |
1656 | return sent; | |
1c2acffb | 1657 | } |
1da177e4 | 1658 | |
1c2acffb GP |
1659 | static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
1660 | { | |
1661 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1662 | struct sk_buff *skb; | |
1663 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1664 | struct l2cap_hdr *lh; | |
1665 | ||
1666 | BT_DBG("sk %p len %d", sk, (int)len); | |
1667 | ||
1668 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1669 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1670 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1671 | if (!skb) | |
1672 | return ERR_PTR(-ENOMEM); | |
1673 | ||
1674 | /* Create L2CAP header */ | |
1675 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1676 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1677 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1678 | put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2)); | |
1679 | ||
1680 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1681 | if (unlikely(err < 0)) { | |
1682 | kfree_skb(skb); | |
1683 | return ERR_PTR(err); | |
1684 | } | |
1685 | return skb; | |
1686 | } | |
1687 | ||
1688 | static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len) | |
1689 | { | |
1690 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1691 | struct sk_buff *skb; | |
1692 | int err, count, hlen = L2CAP_HDR_SIZE; | |
1693 | struct l2cap_hdr *lh; | |
1694 | ||
1695 | BT_DBG("sk %p len %d", sk, (int)len); | |
1696 | ||
1697 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1698 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1699 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1700 | if (!skb) | |
1701 | return ERR_PTR(-ENOMEM); | |
1702 | ||
1703 | /* Create L2CAP header */ | |
1704 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1705 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1706 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1707 | ||
1708 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1709 | if (unlikely(err < 0)) { | |
1710 | kfree_skb(skb); | |
1711 | return ERR_PTR(err); | |
1712 | } | |
1713 | return skb; | |
1714 | } | |
1715 | ||
6840ed07 | 1716 | static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
1c2acffb GP |
1717 | { |
1718 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1719 | struct sk_buff *skb; | |
1720 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1721 | struct l2cap_hdr *lh; | |
1722 | ||
1723 | BT_DBG("sk %p len %d", sk, (int)len); | |
1724 | ||
0ee0d208 GP |
1725 | if (!conn) |
1726 | return ERR_PTR(-ENOTCONN); | |
1727 | ||
c74e560c GP |
1728 | if (sdulen) |
1729 | hlen += 2; | |
1730 | ||
fcc203c3 GP |
1731 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1732 | hlen += 2; | |
1733 | ||
1c2acffb GP |
1734 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
1735 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1736 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1737 | if (!skb) | |
1738 | return ERR_PTR(-ENOMEM); | |
1739 | ||
1740 | /* Create L2CAP header */ | |
1741 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1742 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1743 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1744 | put_unaligned_le16(control, skb_put(skb, 2)); | |
c74e560c GP |
1745 | if (sdulen) |
1746 | put_unaligned_le16(sdulen, skb_put(skb, 2)); | |
1c2acffb GP |
1747 | |
1748 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1749 | if (unlikely(err < 0)) { | |
1750 | kfree_skb(skb); | |
1751 | return ERR_PTR(err); | |
1752 | } | |
e90bac06 | 1753 | |
fcc203c3 GP |
1754 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1755 | put_unaligned_le16(0, skb_put(skb, 2)); | |
1756 | ||
e90bac06 | 1757 | bt_cb(skb)->retries = 0; |
1c2acffb | 1758 | return skb; |
1da177e4 LT |
1759 | } |
1760 | ||
c74e560c GP |
1761 | static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len) |
1762 | { | |
1763 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1764 | struct sk_buff *skb; | |
1765 | struct sk_buff_head sar_queue; | |
1766 | u16 control; | |
1767 | size_t size = 0; | |
1768 | ||
ff12fd64 | 1769 | skb_queue_head_init(&sar_queue); |
c74e560c | 1770 | control = L2CAP_SDU_START; |
1c762159 | 1771 | skb = l2cap_create_iframe_pdu(sk, msg, pi->remote_mps, control, len); |
c74e560c GP |
1772 | if (IS_ERR(skb)) |
1773 | return PTR_ERR(skb); | |
1774 | ||
1775 | __skb_queue_tail(&sar_queue, skb); | |
1c762159 GP |
1776 | len -= pi->remote_mps; |
1777 | size += pi->remote_mps; | |
c74e560c GP |
1778 | |
1779 | while (len > 0) { | |
1780 | size_t buflen; | |
1781 | ||
1c762159 | 1782 | if (len > pi->remote_mps) { |
44651b85 | 1783 | control = L2CAP_SDU_CONTINUE; |
1c762159 | 1784 | buflen = pi->remote_mps; |
c74e560c | 1785 | } else { |
44651b85 | 1786 | control = L2CAP_SDU_END; |
c74e560c GP |
1787 | buflen = len; |
1788 | } | |
1789 | ||
6840ed07 | 1790 | skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0); |
c74e560c GP |
1791 | if (IS_ERR(skb)) { |
1792 | skb_queue_purge(&sar_queue); | |
1793 | return PTR_ERR(skb); | |
1794 | } | |
1795 | ||
1796 | __skb_queue_tail(&sar_queue, skb); | |
1797 | len -= buflen; | |
1798 | size += buflen; | |
c74e560c GP |
1799 | } |
1800 | skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk)); | |
1801 | if (sk->sk_send_head == NULL) | |
1802 | sk->sk_send_head = sar_queue.next; | |
1803 | ||
1804 | return size; | |
1805 | } | |
1806 | ||
1da177e4 LT |
1807 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
1808 | { | |
1809 | struct sock *sk = sock->sk; | |
1c2acffb GP |
1810 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
1811 | struct sk_buff *skb; | |
1812 | u16 control; | |
1813 | int err; | |
1da177e4 LT |
1814 | |
1815 | BT_DBG("sock %p, sk %p", sock, sk); | |
1816 | ||
c1cbe4b7 BL |
1817 | err = sock_error(sk); |
1818 | if (err) | |
1819 | return err; | |
1da177e4 LT |
1820 | |
1821 | if (msg->msg_flags & MSG_OOB) | |
1822 | return -EOPNOTSUPP; | |
1823 | ||
1da177e4 LT |
1824 | lock_sock(sk); |
1825 | ||
1c2acffb | 1826 | if (sk->sk_state != BT_CONNECTED) { |
1da177e4 | 1827 | err = -ENOTCONN; |
1c2acffb GP |
1828 | goto done; |
1829 | } | |
1da177e4 | 1830 | |
1c2acffb GP |
1831 | /* Connectionless channel */ |
1832 | if (sk->sk_type == SOCK_DGRAM) { | |
1833 | skb = l2cap_create_connless_pdu(sk, msg, len); | |
9a9c6a34 | 1834 | if (IS_ERR(skb)) { |
477fffb0 | 1835 | err = PTR_ERR(skb); |
9a9c6a34 GP |
1836 | } else { |
1837 | l2cap_do_send(sk, skb); | |
1838 | err = len; | |
1839 | } | |
1c2acffb GP |
1840 | goto done; |
1841 | } | |
1842 | ||
1843 | switch (pi->mode) { | |
1844 | case L2CAP_MODE_BASIC: | |
c69163e9 GP |
1845 | /* Check outgoing MTU */ |
1846 | if (len > pi->omtu) { | |
f9dd11b0 | 1847 | err = -EMSGSIZE; |
c69163e9 GP |
1848 | goto done; |
1849 | } | |
1850 | ||
1c2acffb GP |
1851 | /* Create a basic PDU */ |
1852 | skb = l2cap_create_basic_pdu(sk, msg, len); | |
1853 | if (IS_ERR(skb)) { | |
1854 | err = PTR_ERR(skb); | |
1855 | goto done; | |
1856 | } | |
1857 | ||
9a9c6a34 GP |
1858 | l2cap_do_send(sk, skb); |
1859 | err = len; | |
1c2acffb GP |
1860 | break; |
1861 | ||
1862 | case L2CAP_MODE_ERTM: | |
6840ed07 | 1863 | case L2CAP_MODE_STREAMING: |
1c2acffb | 1864 | /* Entire SDU fits into one PDU */ |
1c762159 | 1865 | if (len <= pi->remote_mps) { |
1c2acffb | 1866 | control = L2CAP_SDU_UNSEGMENTED; |
6840ed07 | 1867 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
1c2acffb GP |
1868 | if (IS_ERR(skb)) { |
1869 | err = PTR_ERR(skb); | |
1870 | goto done; | |
1871 | } | |
c74e560c | 1872 | __skb_queue_tail(TX_QUEUE(sk), skb); |
dfc909be | 1873 | |
c74e560c GP |
1874 | if (sk->sk_send_head == NULL) |
1875 | sk->sk_send_head = skb; | |
dfc909be | 1876 | |
1c2acffb | 1877 | } else { |
c74e560c GP |
1878 | /* Segment SDU into multiples PDUs */ |
1879 | err = l2cap_sar_segment_sdu(sk, msg, len); | |
1880 | if (err < 0) | |
1881 | goto done; | |
1c2acffb | 1882 | } |
1c2acffb | 1883 | |
dfc909be | 1884 | if (pi->mode == L2CAP_MODE_STREAMING) { |
305682e8 | 1885 | l2cap_streaming_send(sk); |
dfc909be | 1886 | } else { |
6e2b6722 GP |
1887 | if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY && |
1888 | pi->conn_state && L2CAP_CONN_WAIT_F) { | |
1889 | err = len; | |
1890 | break; | |
1891 | } | |
6840ed07 | 1892 | err = l2cap_ertm_send(sk); |
dfc909be | 1893 | } |
6840ed07 | 1894 | |
9e917af1 | 1895 | if (err >= 0) |
1c2acffb GP |
1896 | err = len; |
1897 | break; | |
1898 | ||
1899 | default: | |
1900 | BT_DBG("bad state %1.1x", pi->mode); | |
bc766db2 | 1901 | err = -EBADFD; |
1c2acffb GP |
1902 | } |
1903 | ||
1904 | done: | |
1da177e4 LT |
1905 | release_sock(sk); |
1906 | return err; | |
1907 | } | |
1908 | ||
f66dc81f MH |
1909 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1910 | { | |
1911 | struct sock *sk = sock->sk; | |
1912 | ||
1913 | lock_sock(sk); | |
1914 | ||
1915 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1916 | struct l2cap_conn_rsp rsp; | |
e9aeb2dd GP |
1917 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
1918 | u8 buf[128]; | |
f66dc81f MH |
1919 | |
1920 | sk->sk_state = BT_CONFIG; | |
1921 | ||
1922 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1923 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1924 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1925 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1926 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1927 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1928 | ||
e9aeb2dd GP |
1929 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) { |
1930 | release_sock(sk); | |
1931 | return 0; | |
1932 | } | |
1933 | ||
1934 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
1935 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1936 | l2cap_build_conf_req(sk, buf), buf); | |
1937 | l2cap_pi(sk)->num_conf_req++; | |
1938 | ||
f66dc81f MH |
1939 | release_sock(sk); |
1940 | return 0; | |
1941 | } | |
1942 | ||
1943 | release_sock(sk); | |
1944 | ||
1945 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1946 | } | |
1947 | ||
b7058842 | 1948 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
1949 | { |
1950 | struct sock *sk = sock->sk; | |
1951 | struct l2cap_options opts; | |
f29972de | 1952 | int len, err = 0; |
1da177e4 LT |
1953 | u32 opt; |
1954 | ||
1955 | BT_DBG("sk %p", sk); | |
1956 | ||
1957 | lock_sock(sk); | |
1958 | ||
1959 | switch (optname) { | |
1960 | case L2CAP_OPTIONS: | |
0878b666 MH |
1961 | opts.imtu = l2cap_pi(sk)->imtu; |
1962 | opts.omtu = l2cap_pi(sk)->omtu; | |
1963 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1964 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1965 | opts.fcs = l2cap_pi(sk)->fcs; |
68d7f0ce | 1966 | opts.max_tx = l2cap_pi(sk)->max_tx; |
14b5aa71 | 1967 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
0878b666 | 1968 | |
1da177e4 LT |
1969 | len = min_t(unsigned int, sizeof(opts), optlen); |
1970 | if (copy_from_user((char *) &opts, optval, len)) { | |
1971 | err = -EFAULT; | |
1972 | break; | |
1973 | } | |
0878b666 | 1974 | |
45d65c46 GP |
1975 | if (opts.txwin_size > L2CAP_DEFAULT_TX_WINDOW) { |
1976 | err = -EINVAL; | |
1977 | break; | |
1978 | } | |
1979 | ||
0041ecfa JPRV |
1980 | l2cap_pi(sk)->mode = opts.mode; |
1981 | switch (l2cap_pi(sk)->mode) { | |
1982 | case L2CAP_MODE_BASIC: | |
85eb53c6 | 1983 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_STATE2_DEVICE; |
0041ecfa JPRV |
1984 | break; |
1985 | case L2CAP_MODE_ERTM: | |
1986 | case L2CAP_MODE_STREAMING: | |
1987 | if (enable_ertm) | |
1988 | break; | |
1989 | /* fall through */ | |
1990 | default: | |
1991 | err = -EINVAL; | |
1992 | break; | |
1993 | } | |
1994 | ||
c6b03cf9 MH |
1995 | l2cap_pi(sk)->imtu = opts.imtu; |
1996 | l2cap_pi(sk)->omtu = opts.omtu; | |
fcc203c3 | 1997 | l2cap_pi(sk)->fcs = opts.fcs; |
68d7f0ce | 1998 | l2cap_pi(sk)->max_tx = opts.max_tx; |
14b5aa71 | 1999 | l2cap_pi(sk)->tx_win = (__u8)opts.txwin_size; |
1da177e4 LT |
2000 | break; |
2001 | ||
2002 | case L2CAP_LM: | |
2003 | if (get_user(opt, (u32 __user *) optval)) { | |
2004 | err = -EFAULT; | |
2005 | break; | |
2006 | } | |
2007 | ||
2af6b9d5 MH |
2008 | if (opt & L2CAP_LM_AUTH) |
2009 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
2010 | if (opt & L2CAP_LM_ENCRYPT) | |
2011 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
2012 | if (opt & L2CAP_LM_SECURE) | |
2013 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
2014 | ||
2015 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
2016 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
2017 | break; |
2018 | ||
2019 | default: | |
2020 | err = -ENOPROTOOPT; | |
2021 | break; | |
2022 | } | |
2023 | ||
2024 | release_sock(sk); | |
2025 | return err; | |
2026 | } | |
2027 | ||
b7058842 | 2028 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
d58daf42 MH |
2029 | { |
2030 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
2031 | struct bt_security sec; |
2032 | int len, err = 0; | |
f66dc81f | 2033 | u32 opt; |
d58daf42 MH |
2034 | |
2035 | BT_DBG("sk %p", sk); | |
2036 | ||
2037 | if (level == SOL_L2CAP) | |
2038 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
2039 | ||
0588d94f MH |
2040 | if (level != SOL_BLUETOOTH) |
2041 | return -ENOPROTOOPT; | |
2042 | ||
d58daf42 MH |
2043 | lock_sock(sk); |
2044 | ||
2045 | switch (optname) { | |
2af6b9d5 | 2046 | case BT_SECURITY: |
bd3c9e25 GP |
2047 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
2048 | && sk->sk_type != SOCK_RAW) { | |
0588d94f MH |
2049 | err = -EINVAL; |
2050 | break; | |
2051 | } | |
2052 | ||
2af6b9d5 MH |
2053 | sec.level = BT_SECURITY_LOW; |
2054 | ||
2055 | len = min_t(unsigned int, sizeof(sec), optlen); | |
2056 | if (copy_from_user((char *) &sec, optval, len)) { | |
2057 | err = -EFAULT; | |
2058 | break; | |
2059 | } | |
2060 | ||
2061 | if (sec.level < BT_SECURITY_LOW || | |
2062 | sec.level > BT_SECURITY_HIGH) { | |
2063 | err = -EINVAL; | |
2064 | break; | |
2065 | } | |
2066 | ||
2067 | l2cap_pi(sk)->sec_level = sec.level; | |
2068 | break; | |
2069 | ||
f66dc81f MH |
2070 | case BT_DEFER_SETUP: |
2071 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
2072 | err = -EINVAL; | |
2073 | break; | |
2074 | } | |
2075 | ||
2076 | if (get_user(opt, (u32 __user *) optval)) { | |
2077 | err = -EFAULT; | |
2078 | break; | |
2079 | } | |
2080 | ||
2081 | bt_sk(sk)->defer_setup = opt; | |
2082 | break; | |
2083 | ||
d58daf42 MH |
2084 | default: |
2085 | err = -ENOPROTOOPT; | |
2086 | break; | |
2087 | } | |
2088 | ||
2089 | release_sock(sk); | |
2090 | return err; | |
2091 | } | |
2092 | ||
2093 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
2094 | { |
2095 | struct sock *sk = sock->sk; | |
2096 | struct l2cap_options opts; | |
2097 | struct l2cap_conninfo cinfo; | |
2098 | int len, err = 0; | |
2af6b9d5 | 2099 | u32 opt; |
1da177e4 LT |
2100 | |
2101 | BT_DBG("sk %p", sk); | |
2102 | ||
2103 | if (get_user(len, optlen)) | |
2104 | return -EFAULT; | |
2105 | ||
2106 | lock_sock(sk); | |
2107 | ||
2108 | switch (optname) { | |
2109 | case L2CAP_OPTIONS: | |
2110 | opts.imtu = l2cap_pi(sk)->imtu; | |
2111 | opts.omtu = l2cap_pi(sk)->omtu; | |
2112 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 2113 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 2114 | opts.fcs = l2cap_pi(sk)->fcs; |
68d7f0ce | 2115 | opts.max_tx = l2cap_pi(sk)->max_tx; |
14b5aa71 | 2116 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
1da177e4 LT |
2117 | |
2118 | len = min_t(unsigned int, len, sizeof(opts)); | |
2119 | if (copy_to_user(optval, (char *) &opts, len)) | |
2120 | err = -EFAULT; | |
2121 | ||
2122 | break; | |
2123 | ||
2124 | case L2CAP_LM: | |
2af6b9d5 MH |
2125 | switch (l2cap_pi(sk)->sec_level) { |
2126 | case BT_SECURITY_LOW: | |
2127 | opt = L2CAP_LM_AUTH; | |
2128 | break; | |
2129 | case BT_SECURITY_MEDIUM: | |
2130 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
2131 | break; | |
2132 | case BT_SECURITY_HIGH: | |
2133 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2134 | L2CAP_LM_SECURE; | |
2135 | break; | |
2136 | default: | |
2137 | opt = 0; | |
2138 | break; | |
2139 | } | |
2140 | ||
2141 | if (l2cap_pi(sk)->role_switch) | |
2142 | opt |= L2CAP_LM_MASTER; | |
2143 | ||
2144 | if (l2cap_pi(sk)->force_reliable) | |
2145 | opt |= L2CAP_LM_RELIABLE; | |
2146 | ||
2147 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
2148 | err = -EFAULT; |
2149 | break; | |
2150 | ||
2151 | case L2CAP_CONNINFO: | |
f66dc81f MH |
2152 | if (sk->sk_state != BT_CONNECTED && |
2153 | !(sk->sk_state == BT_CONNECT2 && | |
2154 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
2155 | err = -ENOTCONN; |
2156 | break; | |
2157 | } | |
2158 | ||
2159 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
2160 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
2161 | ||
2162 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
2163 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
2164 | err = -EFAULT; | |
2165 | ||
2166 | break; | |
2167 | ||
2168 | default: | |
2169 | err = -ENOPROTOOPT; | |
2170 | break; | |
2171 | } | |
2172 | ||
2173 | release_sock(sk); | |
2174 | return err; | |
2175 | } | |
2176 | ||
d58daf42 MH |
2177 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
2178 | { | |
2179 | struct sock *sk = sock->sk; | |
2af6b9d5 | 2180 | struct bt_security sec; |
d58daf42 MH |
2181 | int len, err = 0; |
2182 | ||
2183 | BT_DBG("sk %p", sk); | |
2184 | ||
2185 | if (level == SOL_L2CAP) | |
2186 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
2187 | ||
0588d94f MH |
2188 | if (level != SOL_BLUETOOTH) |
2189 | return -ENOPROTOOPT; | |
2190 | ||
d58daf42 MH |
2191 | if (get_user(len, optlen)) |
2192 | return -EFAULT; | |
2193 | ||
2194 | lock_sock(sk); | |
2195 | ||
2196 | switch (optname) { | |
2af6b9d5 | 2197 | case BT_SECURITY: |
bd3c9e25 GP |
2198 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
2199 | && sk->sk_type != SOCK_RAW) { | |
0588d94f MH |
2200 | err = -EINVAL; |
2201 | break; | |
2202 | } | |
2203 | ||
2af6b9d5 MH |
2204 | sec.level = l2cap_pi(sk)->sec_level; |
2205 | ||
2206 | len = min_t(unsigned int, len, sizeof(sec)); | |
2207 | if (copy_to_user(optval, (char *) &sec, len)) | |
2208 | err = -EFAULT; | |
2209 | ||
2210 | break; | |
2211 | ||
f66dc81f MH |
2212 | case BT_DEFER_SETUP: |
2213 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
2214 | err = -EINVAL; | |
2215 | break; | |
2216 | } | |
2217 | ||
2218 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
2219 | err = -EFAULT; | |
2220 | ||
2221 | break; | |
2222 | ||
d58daf42 MH |
2223 | default: |
2224 | err = -ENOPROTOOPT; | |
2225 | break; | |
2226 | } | |
2227 | ||
2228 | release_sock(sk); | |
2229 | return err; | |
2230 | } | |
2231 | ||
1da177e4 LT |
2232 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
2233 | { | |
2234 | struct sock *sk = sock->sk; | |
2235 | int err = 0; | |
2236 | ||
2237 | BT_DBG("sock %p, sk %p", sock, sk); | |
2238 | ||
2239 | if (!sk) | |
2240 | return 0; | |
2241 | ||
2242 | lock_sock(sk); | |
2243 | if (!sk->sk_shutdown) { | |
6161c038 GP |
2244 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
2245 | err = __l2cap_wait_ack(sk); | |
2246 | ||
1da177e4 LT |
2247 | sk->sk_shutdown = SHUTDOWN_MASK; |
2248 | l2cap_sock_clear_timer(sk); | |
2249 | __l2cap_sock_close(sk, 0); | |
2250 | ||
2251 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
2252 | err = bt_sock_wait_state(sk, BT_CLOSED, |
2253 | sk->sk_lingertime); | |
1da177e4 | 2254 | } |
9b108fc0 GP |
2255 | |
2256 | if (!err && sk->sk_err) | |
2257 | err = -sk->sk_err; | |
2258 | ||
1da177e4 LT |
2259 | release_sock(sk); |
2260 | return err; | |
2261 | } | |
2262 | ||
2263 | static int l2cap_sock_release(struct socket *sock) | |
2264 | { | |
2265 | struct sock *sk = sock->sk; | |
2266 | int err; | |
2267 | ||
2268 | BT_DBG("sock %p, sk %p", sock, sk); | |
2269 | ||
2270 | if (!sk) | |
2271 | return 0; | |
2272 | ||
2273 | err = l2cap_sock_shutdown(sock, 2); | |
2274 | ||
2275 | sock_orphan(sk); | |
2276 | l2cap_sock_kill(sk); | |
2277 | return err; | |
2278 | } | |
2279 | ||
1da177e4 LT |
2280 | static void l2cap_chan_ready(struct sock *sk) |
2281 | { | |
2282 | struct sock *parent = bt_sk(sk)->parent; | |
2283 | ||
2284 | BT_DBG("sk %p, parent %p", sk, parent); | |
2285 | ||
2286 | l2cap_pi(sk)->conf_state = 0; | |
2287 | l2cap_sock_clear_timer(sk); | |
2288 | ||
2289 | if (!parent) { | |
2290 | /* Outgoing channel. | |
2291 | * Wake up socket sleeping on connect. | |
2292 | */ | |
2293 | sk->sk_state = BT_CONNECTED; | |
2294 | sk->sk_state_change(sk); | |
2295 | } else { | |
2296 | /* Incoming channel. | |
2297 | * Wake up socket sleeping on accept. | |
2298 | */ | |
2299 | parent->sk_data_ready(parent, 0); | |
2300 | } | |
2301 | } | |
2302 | ||
2303 | /* Copy frame to all raw sockets on that connection */ | |
2304 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
2305 | { | |
2306 | struct l2cap_chan_list *l = &conn->chan_list; | |
2307 | struct sk_buff *nskb; | |
af05b30b | 2308 | struct sock *sk; |
1da177e4 LT |
2309 | |
2310 | BT_DBG("conn %p", conn); | |
2311 | ||
2312 | read_lock(&l->lock); | |
2313 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2314 | if (sk->sk_type != SOCK_RAW) | |
2315 | continue; | |
2316 | ||
2317 | /* Don't send frame to the socket it came from */ | |
2318 | if (skb->sk == sk) | |
2319 | continue; | |
af05b30b GP |
2320 | nskb = skb_clone(skb, GFP_ATOMIC); |
2321 | if (!nskb) | |
1da177e4 LT |
2322 | continue; |
2323 | ||
2324 | if (sock_queue_rcv_skb(sk, nskb)) | |
2325 | kfree_skb(nskb); | |
2326 | } | |
2327 | read_unlock(&l->lock); | |
2328 | } | |
2329 | ||
2330 | /* ---- L2CAP signalling commands ---- */ | |
2331 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
2332 | u8 code, u8 ident, u16 dlen, void *data) | |
2333 | { | |
2334 | struct sk_buff *skb, **frag; | |
2335 | struct l2cap_cmd_hdr *cmd; | |
2336 | struct l2cap_hdr *lh; | |
2337 | int len, count; | |
2338 | ||
af05b30b GP |
2339 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
2340 | conn, code, ident, dlen); | |
1da177e4 LT |
2341 | |
2342 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
2343 | count = min_t(unsigned int, conn->mtu, len); | |
2344 | ||
2345 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
2346 | if (!skb) | |
2347 | return NULL; | |
2348 | ||
2349 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c | 2350 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
8db4dc46 | 2351 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
1da177e4 LT |
2352 | |
2353 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
2354 | cmd->code = code; | |
2355 | cmd->ident = ident; | |
aca3192c | 2356 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
2357 | |
2358 | if (dlen) { | |
2359 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
2360 | memcpy(skb_put(skb, count), data, count); | |
2361 | data += count; | |
2362 | } | |
2363 | ||
2364 | len -= skb->len; | |
2365 | ||
2366 | /* Continuation fragments (no L2CAP header) */ | |
2367 | frag = &skb_shinfo(skb)->frag_list; | |
2368 | while (len) { | |
2369 | count = min_t(unsigned int, conn->mtu, len); | |
2370 | ||
2371 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
2372 | if (!*frag) | |
2373 | goto fail; | |
2374 | ||
2375 | memcpy(skb_put(*frag, count), data, count); | |
2376 | ||
2377 | len -= count; | |
2378 | data += count; | |
2379 | ||
2380 | frag = &(*frag)->next; | |
2381 | } | |
2382 | ||
2383 | return skb; | |
2384 | ||
2385 | fail: | |
2386 | kfree_skb(skb); | |
2387 | return NULL; | |
2388 | } | |
2389 | ||
2390 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
2391 | { | |
2392 | struct l2cap_conf_opt *opt = *ptr; | |
2393 | int len; | |
2394 | ||
2395 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
2396 | *ptr += len; | |
2397 | ||
2398 | *type = opt->type; | |
2399 | *olen = opt->len; | |
2400 | ||
2401 | switch (opt->len) { | |
2402 | case 1: | |
2403 | *val = *((u8 *) opt->val); | |
2404 | break; | |
2405 | ||
2406 | case 2: | |
861d6882 | 2407 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
2408 | break; |
2409 | ||
2410 | case 4: | |
861d6882 | 2411 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
2412 | break; |
2413 | ||
2414 | default: | |
2415 | *val = (unsigned long) opt->val; | |
2416 | break; | |
2417 | } | |
2418 | ||
2419 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
2420 | return len; | |
2421 | } | |
2422 | ||
1da177e4 LT |
2423 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
2424 | { | |
2425 | struct l2cap_conf_opt *opt = *ptr; | |
2426 | ||
2427 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
2428 | ||
2429 | opt->type = type; | |
2430 | opt->len = len; | |
2431 | ||
2432 | switch (len) { | |
2433 | case 1: | |
2434 | *((u8 *) opt->val) = val; | |
2435 | break; | |
2436 | ||
2437 | case 2: | |
8e036fc3 | 2438 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
2439 | break; |
2440 | ||
2441 | case 4: | |
8e036fc3 | 2442 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
2443 | break; |
2444 | ||
2445 | default: | |
2446 | memcpy(opt->val, (void *) val, len); | |
2447 | break; | |
2448 | } | |
2449 | ||
2450 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
2451 | } | |
2452 | ||
c1b4f43b GP |
2453 | static void l2cap_ack_timeout(unsigned long arg) |
2454 | { | |
2455 | struct sock *sk = (void *) arg; | |
2456 | ||
2457 | bh_lock_sock(sk); | |
2458 | l2cap_send_ack(l2cap_pi(sk)); | |
2459 | bh_unlock_sock(sk); | |
2460 | } | |
2461 | ||
0565c1c2 GP |
2462 | static inline void l2cap_ertm_init(struct sock *sk) |
2463 | { | |
2464 | l2cap_pi(sk)->expected_ack_seq = 0; | |
2465 | l2cap_pi(sk)->unacked_frames = 0; | |
2466 | l2cap_pi(sk)->buffer_seq = 0; | |
803020c6 | 2467 | l2cap_pi(sk)->num_acked = 0; |
d5392c8f | 2468 | l2cap_pi(sk)->frames_sent = 0; |
0565c1c2 GP |
2469 | |
2470 | setup_timer(&l2cap_pi(sk)->retrans_timer, | |
2471 | l2cap_retrans_timeout, (unsigned long) sk); | |
2472 | setup_timer(&l2cap_pi(sk)->monitor_timer, | |
2473 | l2cap_monitor_timeout, (unsigned long) sk); | |
c1b4f43b GP |
2474 | setup_timer(&l2cap_pi(sk)->ack_timer, |
2475 | l2cap_ack_timeout, (unsigned long) sk); | |
0565c1c2 GP |
2476 | |
2477 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b GP |
2478 | __skb_queue_head_init(BUSY_QUEUE(sk)); |
2479 | ||
2480 | INIT_WORK(&l2cap_pi(sk)->busy_work, l2cap_busy_work); | |
218bb9df GP |
2481 | |
2482 | sk->sk_backlog_rcv = l2cap_ertm_data_rcv; | |
0565c1c2 GP |
2483 | } |
2484 | ||
f2fcfcd6 GP |
2485 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
2486 | { | |
2487 | switch (mode) { | |
2488 | case L2CAP_MODE_STREAMING: | |
2489 | case L2CAP_MODE_ERTM: | |
2490 | if (l2cap_mode_supported(mode, remote_feat_mask)) | |
2491 | return mode; | |
2492 | /* fall through */ | |
2493 | default: | |
2494 | return L2CAP_MODE_BASIC; | |
2495 | } | |
2496 | } | |
2497 | ||
1da177e4 LT |
2498 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
2499 | { | |
2500 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2501 | struct l2cap_conf_req *req = data; | |
bd3c9e25 | 2502 | struct l2cap_conf_rfc rfc = { .mode = pi->mode }; |
1da177e4 LT |
2503 | void *ptr = req->data; |
2504 | ||
2505 | BT_DBG("sk %p", sk); | |
2506 | ||
f2fcfcd6 GP |
2507 | if (pi->num_conf_req || pi->num_conf_rsp) |
2508 | goto done; | |
2509 | ||
2510 | switch (pi->mode) { | |
2511 | case L2CAP_MODE_STREAMING: | |
2512 | case L2CAP_MODE_ERTM: | |
2ba13ed6 | 2513 | if (pi->conf_state & L2CAP_CONF_STATE2_DEVICE) |
85eb53c6 | 2514 | break; |
85eb53c6 | 2515 | |
2ba13ed6 | 2516 | /* fall through */ |
f2fcfcd6 GP |
2517 | default: |
2518 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2519 | break; | |
2520 | } | |
2521 | ||
2522 | done: | |
65c7c491 MH |
2523 | switch (pi->mode) { |
2524 | case L2CAP_MODE_BASIC: | |
2525 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
2526 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
62547752 GP |
2527 | |
2528 | rfc.mode = L2CAP_MODE_BASIC; | |
2529 | rfc.txwin_size = 0; | |
2530 | rfc.max_transmit = 0; | |
2531 | rfc.retrans_timeout = 0; | |
2532 | rfc.monitor_timeout = 0; | |
2533 | rfc.max_pdu_size = 0; | |
2534 | ||
65c7c491 MH |
2535 | break; |
2536 | ||
2537 | case L2CAP_MODE_ERTM: | |
2538 | rfc.mode = L2CAP_MODE_ERTM; | |
14b5aa71 | 2539 | rfc.txwin_size = pi->tx_win; |
68d7f0ce | 2540 | rfc.max_transmit = pi->max_tx; |
f2fcfcd6 GP |
2541 | rfc.retrans_timeout = 0; |
2542 | rfc.monitor_timeout = 0; | |
c74e560c | 2543 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
d1daa091 | 2544 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
1c762159 | 2545 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
f2fcfcd6 | 2546 | |
fcc203c3 GP |
2547 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
2548 | break; | |
2549 | ||
2550 | if (pi->fcs == L2CAP_FCS_NONE || | |
2551 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2552 | pi->fcs = L2CAP_FCS_NONE; | |
2553 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2554 | } | |
f2fcfcd6 GP |
2555 | break; |
2556 | ||
2557 | case L2CAP_MODE_STREAMING: | |
2558 | rfc.mode = L2CAP_MODE_STREAMING; | |
2559 | rfc.txwin_size = 0; | |
2560 | rfc.max_transmit = 0; | |
2561 | rfc.retrans_timeout = 0; | |
2562 | rfc.monitor_timeout = 0; | |
c74e560c | 2563 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
d1daa091 | 2564 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
1c762159 | 2565 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
65c7c491 | 2566 | |
fcc203c3 GP |
2567 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
2568 | break; | |
2569 | ||
2570 | if (pi->fcs == L2CAP_FCS_NONE || | |
2571 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2572 | pi->fcs = L2CAP_FCS_NONE; | |
2573 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2574 | } | |
65c7c491 MH |
2575 | break; |
2576 | } | |
1da177e4 | 2577 | |
62547752 GP |
2578 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
2579 | (unsigned long) &rfc); | |
2580 | ||
1da177e4 LT |
2581 | /* FIXME: Need actual value of the flush timeout */ |
2582 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
2583 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
2584 | ||
aca3192c YH |
2585 | req->dcid = cpu_to_le16(pi->dcid); |
2586 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
2587 | |
2588 | return ptr - data; | |
2589 | } | |
2590 | ||
5dee9e7c | 2591 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
2592 | { |
2593 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
2594 | struct l2cap_conf_rsp *rsp = data; |
2595 | void *ptr = rsp->data; | |
2596 | void *req = pi->conf_req; | |
2597 | int len = pi->conf_len; | |
2598 | int type, hint, olen; | |
2599 | unsigned long val; | |
6464f35f | 2600 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 2601 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 2602 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 2603 | |
5dee9e7c | 2604 | BT_DBG("sk %p", sk); |
820ae1b8 | 2605 | |
5dee9e7c MH |
2606 | while (len >= L2CAP_CONF_OPT_SIZE) { |
2607 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 2608 | |
589d2746 | 2609 | hint = type & L2CAP_CONF_HINT; |
47ec1dcd | 2610 | type &= L2CAP_CONF_MASK; |
5dee9e7c MH |
2611 | |
2612 | switch (type) { | |
2613 | case L2CAP_CONF_MTU: | |
861d6882 | 2614 | mtu = val; |
5dee9e7c MH |
2615 | break; |
2616 | ||
2617 | case L2CAP_CONF_FLUSH_TO: | |
2618 | pi->flush_to = val; | |
2619 | break; | |
2620 | ||
2621 | case L2CAP_CONF_QOS: | |
2622 | break; | |
2623 | ||
6464f35f MH |
2624 | case L2CAP_CONF_RFC: |
2625 | if (olen == sizeof(rfc)) | |
2626 | memcpy(&rfc, (void *) val, olen); | |
2627 | break; | |
2628 | ||
fcc203c3 GP |
2629 | case L2CAP_CONF_FCS: |
2630 | if (val == L2CAP_FCS_NONE) | |
2631 | pi->conf_state |= L2CAP_CONF_NO_FCS_RECV; | |
2632 | ||
2633 | break; | |
2634 | ||
5dee9e7c MH |
2635 | default: |
2636 | if (hint) | |
2637 | break; | |
2638 | ||
2639 | result = L2CAP_CONF_UNKNOWN; | |
2640 | *((u8 *) ptr++) = type; | |
2641 | break; | |
2642 | } | |
2643 | } | |
2644 | ||
e9aeb2dd | 2645 | if (pi->num_conf_rsp || pi->num_conf_req > 1) |
f2fcfcd6 GP |
2646 | goto done; |
2647 | ||
2648 | switch (pi->mode) { | |
2649 | case L2CAP_MODE_STREAMING: | |
2650 | case L2CAP_MODE_ERTM: | |
85eb53c6 GP |
2651 | if (!(pi->conf_state & L2CAP_CONF_STATE2_DEVICE)) { |
2652 | pi->mode = l2cap_select_mode(rfc.mode, | |
2653 | pi->conn->feat_mask); | |
2654 | break; | |
2655 | } | |
2656 | ||
742e519b | 2657 | if (pi->mode != rfc.mode) |
f2fcfcd6 | 2658 | return -ECONNREFUSED; |
742e519b | 2659 | |
f2fcfcd6 | 2660 | break; |
f2fcfcd6 GP |
2661 | } |
2662 | ||
2663 | done: | |
2664 | if (pi->mode != rfc.mode) { | |
2665 | result = L2CAP_CONF_UNACCEPT; | |
2666 | rfc.mode = pi->mode; | |
2667 | ||
2668 | if (pi->num_conf_rsp == 1) | |
2669 | return -ECONNREFUSED; | |
2670 | ||
2671 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2672 | sizeof(rfc), (unsigned long) &rfc); | |
2673 | } | |
2674 | ||
2675 | ||
5dee9e7c MH |
2676 | if (result == L2CAP_CONF_SUCCESS) { |
2677 | /* Configure output options and let the other side know | |
2678 | * which ones we don't like. */ | |
2679 | ||
f2fcfcd6 GP |
2680 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
2681 | result = L2CAP_CONF_UNACCEPT; | |
2682 | else { | |
2683 | pi->omtu = mtu; | |
2684 | pi->conf_state |= L2CAP_CONF_MTU_DONE; | |
2685 | } | |
2686 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
6464f35f | 2687 | |
f2fcfcd6 GP |
2688 | switch (rfc.mode) { |
2689 | case L2CAP_MODE_BASIC: | |
2690 | pi->fcs = L2CAP_FCS_NONE; | |
2691 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
2692 | break; | |
2693 | ||
2694 | case L2CAP_MODE_ERTM: | |
2695 | pi->remote_tx_win = rfc.txwin_size; | |
2696 | pi->remote_max_tx = rfc.max_transmit; | |
1c762159 GP |
2697 | if (rfc.max_pdu_size > pi->conn->mtu - 10) |
2698 | rfc.max_pdu_size = le16_to_cpu(pi->conn->mtu - 10); | |
2699 | ||
2700 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); | |
f2fcfcd6 | 2701 | |
10467e9e GP |
2702 | rfc.retrans_timeout = |
2703 | le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO); | |
2704 | rfc.monitor_timeout = | |
2705 | le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO); | |
f2fcfcd6 GP |
2706 | |
2707 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2708 | |
2709 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2710 | sizeof(rfc), (unsigned long) &rfc); | |
2711 | ||
f2fcfcd6 GP |
2712 | break; |
2713 | ||
2714 | case L2CAP_MODE_STREAMING: | |
1c762159 GP |
2715 | if (rfc.max_pdu_size > pi->conn->mtu - 10) |
2716 | rfc.max_pdu_size = le16_to_cpu(pi->conn->mtu - 10); | |
2717 | ||
2718 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); | |
f2fcfcd6 GP |
2719 | |
2720 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2721 | |
2722 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2723 | sizeof(rfc), (unsigned long) &rfc); | |
2724 | ||
f2fcfcd6 GP |
2725 | break; |
2726 | ||
2727 | default: | |
5dee9e7c | 2728 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 2729 | |
6464f35f | 2730 | memset(&rfc, 0, sizeof(rfc)); |
f2fcfcd6 GP |
2731 | rfc.mode = pi->mode; |
2732 | } | |
6464f35f | 2733 | |
f2fcfcd6 GP |
2734 | if (result == L2CAP_CONF_SUCCESS) |
2735 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
2736 | } | |
5dee9e7c MH |
2737 | rsp->scid = cpu_to_le16(pi->dcid); |
2738 | rsp->result = cpu_to_le16(result); | |
2739 | rsp->flags = cpu_to_le16(0x0000); | |
2740 | ||
2741 | return ptr - data; | |
1da177e4 LT |
2742 | } |
2743 | ||
f2fcfcd6 GP |
2744 | static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result) |
2745 | { | |
2746 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2747 | struct l2cap_conf_req *req = data; | |
2748 | void *ptr = req->data; | |
2749 | int type, olen; | |
2750 | unsigned long val; | |
2751 | struct l2cap_conf_rfc rfc; | |
2752 | ||
2753 | BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data); | |
2754 | ||
2755 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2756 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2757 | ||
2758 | switch (type) { | |
2759 | case L2CAP_CONF_MTU: | |
2760 | if (val < L2CAP_DEFAULT_MIN_MTU) { | |
2761 | *result = L2CAP_CONF_UNACCEPT; | |
2762 | pi->omtu = L2CAP_DEFAULT_MIN_MTU; | |
2763 | } else | |
2764 | pi->omtu = val; | |
2765 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
2766 | break; | |
2767 | ||
2768 | case L2CAP_CONF_FLUSH_TO: | |
2769 | pi->flush_to = val; | |
2770 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, | |
2771 | 2, pi->flush_to); | |
2772 | break; | |
2773 | ||
2774 | case L2CAP_CONF_RFC: | |
2775 | if (olen == sizeof(rfc)) | |
2776 | memcpy(&rfc, (void *)val, olen); | |
2777 | ||
2778 | if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) && | |
2779 | rfc.mode != pi->mode) | |
2780 | return -ECONNREFUSED; | |
2781 | ||
f2fcfcd6 GP |
2782 | pi->fcs = 0; |
2783 | ||
2784 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2785 | sizeof(rfc), (unsigned long) &rfc); | |
2786 | break; | |
2787 | } | |
2788 | } | |
2789 | ||
6c2ea7a8 GP |
2790 | if (pi->mode == L2CAP_MODE_BASIC && pi->mode != rfc.mode) |
2791 | return -ECONNREFUSED; | |
2792 | ||
2793 | pi->mode = rfc.mode; | |
2794 | ||
f2fcfcd6 GP |
2795 | if (*result == L2CAP_CONF_SUCCESS) { |
2796 | switch (rfc.mode) { | |
2797 | case L2CAP_MODE_ERTM: | |
2798 | pi->remote_tx_win = rfc.txwin_size; | |
10467e9e GP |
2799 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
2800 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); | |
1c762159 | 2801 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
f2fcfcd6 GP |
2802 | break; |
2803 | case L2CAP_MODE_STREAMING: | |
1c762159 | 2804 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
f2fcfcd6 GP |
2805 | } |
2806 | } | |
2807 | ||
2808 | req->dcid = cpu_to_le16(pi->dcid); | |
2809 | req->flags = cpu_to_le16(0x0000); | |
2810 | ||
2811 | return ptr - data; | |
2812 | } | |
2813 | ||
5dee9e7c | 2814 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
2815 | { |
2816 | struct l2cap_conf_rsp *rsp = data; | |
2817 | void *ptr = rsp->data; | |
1da177e4 | 2818 | |
5dee9e7c | 2819 | BT_DBG("sk %p", sk); |
1da177e4 | 2820 | |
aca3192c | 2821 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 2822 | rsp->result = cpu_to_le16(result); |
aca3192c | 2823 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
2824 | |
2825 | return ptr - data; | |
2826 | } | |
2827 | ||
7b1c0049 GP |
2828 | static void l2cap_conf_rfc_get(struct sock *sk, void *rsp, int len) |
2829 | { | |
2830 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2831 | int type, olen; | |
2832 | unsigned long val; | |
2833 | struct l2cap_conf_rfc rfc; | |
2834 | ||
2835 | BT_DBG("sk %p, rsp %p, len %d", sk, rsp, len); | |
2836 | ||
2837 | if ((pi->mode != L2CAP_MODE_ERTM) && (pi->mode != L2CAP_MODE_STREAMING)) | |
2838 | return; | |
2839 | ||
2840 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2841 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2842 | ||
2843 | switch (type) { | |
2844 | case L2CAP_CONF_RFC: | |
2845 | if (olen == sizeof(rfc)) | |
2846 | memcpy(&rfc, (void *)val, olen); | |
2847 | goto done; | |
2848 | } | |
2849 | } | |
2850 | ||
2851 | done: | |
2852 | switch (rfc.mode) { | |
2853 | case L2CAP_MODE_ERTM: | |
2854 | pi->remote_tx_win = rfc.txwin_size; | |
10467e9e GP |
2855 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
2856 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); | |
7b1c0049 GP |
2857 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
2858 | break; | |
2859 | case L2CAP_MODE_STREAMING: | |
2860 | pi->mps = le16_to_cpu(rfc.max_pdu_size); | |
2861 | } | |
2862 | } | |
2863 | ||
4e8402a3 MH |
2864 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2865 | { | |
2866 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
2867 | ||
2868 | if (rej->reason != 0x0000) | |
2869 | return 0; | |
2870 | ||
2871 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
2872 | cmd->ident == conn->info_ident) { | |
4e8402a3 | 2873 | del_timer(&conn->info_timer); |
984947dc MH |
2874 | |
2875 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
e1027a7c | 2876 | conn->info_ident = 0; |
984947dc | 2877 | |
4e8402a3 MH |
2878 | l2cap_conn_start(conn); |
2879 | } | |
2880 | ||
2881 | return 0; | |
2882 | } | |
2883 | ||
1da177e4 LT |
2884 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2885 | { | |
2886 | struct l2cap_chan_list *list = &conn->chan_list; | |
2887 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
2888 | struct l2cap_conn_rsp rsp; | |
e9aeb2dd | 2889 | struct sock *parent, *uninitialized_var(sk); |
e7c29cb1 | 2890 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
2891 | |
2892 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 2893 | __le16 psm = req->psm; |
1da177e4 LT |
2894 | |
2895 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
2896 | ||
2897 | /* Check if we have socket listening on psm */ | |
2898 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
2899 | if (!parent) { | |
2900 | result = L2CAP_CR_BAD_PSM; | |
2901 | goto sendresp; | |
2902 | } | |
2903 | ||
e7c29cb1 MH |
2904 | /* Check if the ACL is secure enough (if not SDP) */ |
2905 | if (psm != cpu_to_le16(0x0001) && | |
2906 | !hci_conn_check_link_mode(conn->hcon)) { | |
2950f21a | 2907 | conn->disc_reason = 0x05; |
e7c29cb1 MH |
2908 | result = L2CAP_CR_SEC_BLOCK; |
2909 | goto response; | |
2910 | } | |
2911 | ||
1da177e4 LT |
2912 | result = L2CAP_CR_NO_MEM; |
2913 | ||
2914 | /* Check for backlog size */ | |
2915 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 2916 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
2917 | goto response; |
2918 | } | |
2919 | ||
3b1e0a65 | 2920 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
2921 | if (!sk) |
2922 | goto response; | |
2923 | ||
fd1278d7 | 2924 | write_lock_bh(&list->lock); |
1da177e4 LT |
2925 | |
2926 | /* Check if we already have channel with that dcid */ | |
2927 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 2928 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2929 | sock_set_flag(sk, SOCK_ZAPPED); |
2930 | l2cap_sock_kill(sk); | |
2931 | goto response; | |
2932 | } | |
2933 | ||
2934 | hci_conn_hold(conn->hcon); | |
2935 | ||
2936 | l2cap_sock_init(sk, parent); | |
2937 | bacpy(&bt_sk(sk)->src, conn->src); | |
2938 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
2939 | l2cap_pi(sk)->psm = psm; | |
2940 | l2cap_pi(sk)->dcid = scid; | |
2941 | ||
2942 | __l2cap_chan_add(conn, sk, parent); | |
2943 | dcid = l2cap_pi(sk)->scid; | |
2944 | ||
2945 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
2946 | ||
1da177e4 LT |
2947 | l2cap_pi(sk)->ident = cmd->ident; |
2948 | ||
984947dc | 2949 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
2af6b9d5 | 2950 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
2951 | if (bt_sk(sk)->defer_setup) { |
2952 | sk->sk_state = BT_CONNECT2; | |
2953 | result = L2CAP_CR_PEND; | |
2954 | status = L2CAP_CS_AUTHOR_PEND; | |
2955 | parent->sk_data_ready(parent, 0); | |
2956 | } else { | |
2957 | sk->sk_state = BT_CONFIG; | |
2958 | result = L2CAP_CR_SUCCESS; | |
2959 | status = L2CAP_CS_NO_INFO; | |
2960 | } | |
79d554a6 MH |
2961 | } else { |
2962 | sk->sk_state = BT_CONNECT2; | |
2963 | result = L2CAP_CR_PEND; | |
2964 | status = L2CAP_CS_AUTHEN_PEND; | |
2965 | } | |
2966 | } else { | |
2967 | sk->sk_state = BT_CONNECT2; | |
2968 | result = L2CAP_CR_PEND; | |
2969 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
2970 | } |
2971 | ||
fd1278d7 | 2972 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2973 | |
2974 | response: | |
2975 | bh_unlock_sock(parent); | |
2976 | ||
2977 | sendresp: | |
aca3192c YH |
2978 | rsp.scid = cpu_to_le16(scid); |
2979 | rsp.dcid = cpu_to_le16(dcid); | |
2980 | rsp.result = cpu_to_le16(result); | |
2981 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 2982 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
2983 | |
2984 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
2985 | struct l2cap_info_req info; | |
2986 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2987 | ||
2988 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
2989 | conn->info_ident = l2cap_get_ident(conn); | |
2990 | ||
2991 | mod_timer(&conn->info_timer, jiffies + | |
2992 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
2993 | ||
2994 | l2cap_send_cmd(conn, conn->info_ident, | |
2995 | L2CAP_INFO_REQ, sizeof(info), &info); | |
2996 | } | |
2997 | ||
e9aeb2dd GP |
2998 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) && |
2999 | result == L2CAP_CR_SUCCESS) { | |
3000 | u8 buf[128]; | |
3001 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
3002 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
3003 | l2cap_build_conf_req(sk, buf), buf); | |
3004 | l2cap_pi(sk)->num_conf_req++; | |
3005 | } | |
3006 | ||
1da177e4 LT |
3007 | return 0; |
3008 | } | |
3009 | ||
3010 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3011 | { | |
3012 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
3013 | u16 scid, dcid, result, status; | |
3014 | struct sock *sk; | |
3015 | u8 req[128]; | |
3016 | ||
3017 | scid = __le16_to_cpu(rsp->scid); | |
3018 | dcid = __le16_to_cpu(rsp->dcid); | |
3019 | result = __le16_to_cpu(rsp->result); | |
3020 | status = __le16_to_cpu(rsp->status); | |
3021 | ||
3022 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
3023 | ||
3024 | if (scid) { | |
af05b30b GP |
3025 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
3026 | if (!sk) | |
57d3b22b | 3027 | return -EFAULT; |
1da177e4 | 3028 | } else { |
af05b30b GP |
3029 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
3030 | if (!sk) | |
57d3b22b | 3031 | return -EFAULT; |
1da177e4 LT |
3032 | } |
3033 | ||
3034 | switch (result) { | |
3035 | case L2CAP_CR_SUCCESS: | |
3036 | sk->sk_state = BT_CONFIG; | |
3037 | l2cap_pi(sk)->ident = 0; | |
3038 | l2cap_pi(sk)->dcid = dcid; | |
6a8d3010 MH |
3039 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
3040 | ||
e9aeb2dd GP |
3041 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) |
3042 | break; | |
3043 | ||
3044 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
3045 | ||
1da177e4 LT |
3046 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
3047 | l2cap_build_conf_req(sk, req), req); | |
f2fcfcd6 | 3048 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
3049 | break; |
3050 | ||
3051 | case L2CAP_CR_PEND: | |
6a8d3010 | 3052 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 LT |
3053 | break; |
3054 | ||
3055 | default: | |
3056 | l2cap_chan_del(sk, ECONNREFUSED); | |
3057 | break; | |
3058 | } | |
3059 | ||
3060 | bh_unlock_sock(sk); | |
3061 | return 0; | |
3062 | } | |
3063 | ||
88219a0f | 3064 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
3065 | { |
3066 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
3067 | u16 dcid, flags; | |
3068 | u8 rsp[64]; | |
3069 | struct sock *sk; | |
5dee9e7c | 3070 | int len; |
1da177e4 LT |
3071 | |
3072 | dcid = __le16_to_cpu(req->dcid); | |
3073 | flags = __le16_to_cpu(req->flags); | |
3074 | ||
3075 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
3076 | ||
af05b30b GP |
3077 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
3078 | if (!sk) | |
1da177e4 LT |
3079 | return -ENOENT; |
3080 | ||
8cb8e6f1 GP |
3081 | if (sk->sk_state != BT_CONFIG) { |
3082 | struct l2cap_cmd_rej rej; | |
3083 | ||
3084 | rej.reason = cpu_to_le16(0x0002); | |
3085 | l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, | |
3086 | sizeof(rej), &rej); | |
354f60a9 | 3087 | goto unlock; |
8cb8e6f1 | 3088 | } |
354f60a9 | 3089 | |
5dee9e7c | 3090 | /* Reject if config buffer is too small. */ |
88219a0f | 3091 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
3092 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
3093 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
3094 | l2cap_build_conf_rsp(sk, rsp, | |
3095 | L2CAP_CONF_REJECT, flags), rsp); | |
3096 | goto unlock; | |
3097 | } | |
3098 | ||
3099 | /* Store config. */ | |
3100 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
3101 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
3102 | |
3103 | if (flags & 0x0001) { | |
3104 | /* Incomplete config. Send empty response. */ | |
3105 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
3106 | l2cap_build_conf_rsp(sk, rsp, |
3107 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
3108 | goto unlock; |
3109 | } | |
3110 | ||
3111 | /* Complete config. */ | |
5dee9e7c | 3112 | len = l2cap_parse_conf_req(sk, rsp); |
f2fcfcd6 | 3113 | if (len < 0) { |
9b108fc0 | 3114 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
1da177e4 | 3115 | goto unlock; |
f2fcfcd6 | 3116 | } |
1da177e4 | 3117 | |
5dee9e7c | 3118 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
f2fcfcd6 | 3119 | l2cap_pi(sk)->num_conf_rsp++; |
5dee9e7c | 3120 | |
5dee9e7c MH |
3121 | /* Reset config buffer. */ |
3122 | l2cap_pi(sk)->conf_len = 0; | |
3123 | ||
876d9484 MH |
3124 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
3125 | goto unlock; | |
3126 | ||
1da177e4 | 3127 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
f64f9e71 JP |
3128 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
3129 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
fcc203c3 GP |
3130 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
3131 | ||
1da177e4 | 3132 | sk->sk_state = BT_CONNECTED; |
e90bac06 | 3133 | |
0565c1c2 GP |
3134 | l2cap_pi(sk)->next_tx_seq = 0; |
3135 | l2cap_pi(sk)->expected_tx_seq = 0; | |
1c2acffb | 3136 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
3137 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
3138 | l2cap_ertm_init(sk); | |
3139 | ||
1da177e4 | 3140 | l2cap_chan_ready(sk); |
876d9484 MH |
3141 | goto unlock; |
3142 | } | |
3143 | ||
3144 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 3145 | u8 buf[64]; |
1da177e4 | 3146 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 3147 | l2cap_build_conf_req(sk, buf), buf); |
f2fcfcd6 | 3148 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
3149 | } |
3150 | ||
3151 | unlock: | |
3152 | bh_unlock_sock(sk); | |
3153 | return 0; | |
3154 | } | |
3155 | ||
3156 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3157 | { | |
3158 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
3159 | u16 scid, flags, result; | |
3160 | struct sock *sk; | |
7b1c0049 | 3161 | int len = cmd->len - sizeof(*rsp); |
1da177e4 LT |
3162 | |
3163 | scid = __le16_to_cpu(rsp->scid); | |
3164 | flags = __le16_to_cpu(rsp->flags); | |
3165 | result = __le16_to_cpu(rsp->result); | |
3166 | ||
af05b30b GP |
3167 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
3168 | scid, flags, result); | |
1da177e4 | 3169 | |
af05b30b GP |
3170 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
3171 | if (!sk) | |
1da177e4 LT |
3172 | return 0; |
3173 | ||
3174 | switch (result) { | |
3175 | case L2CAP_CONF_SUCCESS: | |
7b1c0049 | 3176 | l2cap_conf_rfc_get(sk, rsp->data, len); |
1da177e4 LT |
3177 | break; |
3178 | ||
3179 | case L2CAP_CONF_UNACCEPT: | |
f2fcfcd6 | 3180 | if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
f2fcfcd6 GP |
3181 | char req[64]; |
3182 | ||
c2c77ec8 | 3183 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
9b108fc0 | 3184 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
c2c77ec8 AE |
3185 | goto done; |
3186 | } | |
3187 | ||
f2fcfcd6 GP |
3188 | /* throw out any old stored conf requests */ |
3189 | result = L2CAP_CONF_SUCCESS; | |
3190 | len = l2cap_parse_conf_rsp(sk, rsp->data, | |
3191 | len, req, &result); | |
3192 | if (len < 0) { | |
9b108fc0 | 3193 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
f2fcfcd6 GP |
3194 | goto done; |
3195 | } | |
3196 | ||
3197 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
3198 | L2CAP_CONF_REQ, len, req); | |
3199 | l2cap_pi(sk)->num_conf_req++; | |
3200 | if (result != L2CAP_CONF_SUCCESS) | |
3201 | goto done; | |
3202 | break; | |
1da177e4 LT |
3203 | } |
3204 | ||
8e87d142 | 3205 | default: |
b1235d79 | 3206 | sk->sk_err = ECONNRESET; |
1da177e4 | 3207 | l2cap_sock_set_timer(sk, HZ * 5); |
9b108fc0 | 3208 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
1da177e4 LT |
3209 | goto done; |
3210 | } | |
3211 | ||
3212 | if (flags & 0x01) | |
3213 | goto done; | |
3214 | ||
1da177e4 LT |
3215 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
3216 | ||
3217 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
f64f9e71 JP |
3218 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
3219 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
fcc203c3 GP |
3220 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
3221 | ||
1da177e4 | 3222 | sk->sk_state = BT_CONNECTED; |
0565c1c2 | 3223 | l2cap_pi(sk)->next_tx_seq = 0; |
1c2acffb | 3224 | l2cap_pi(sk)->expected_tx_seq = 0; |
1c2acffb | 3225 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
3226 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
3227 | l2cap_ertm_init(sk); | |
3228 | ||
1da177e4 LT |
3229 | l2cap_chan_ready(sk); |
3230 | } | |
3231 | ||
3232 | done: | |
3233 | bh_unlock_sock(sk); | |
3234 | return 0; | |
3235 | } | |
3236 | ||
3237 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3238 | { | |
3239 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
3240 | struct l2cap_disconn_rsp rsp; | |
3241 | u16 dcid, scid; | |
3242 | struct sock *sk; | |
3243 | ||
3244 | scid = __le16_to_cpu(req->scid); | |
3245 | dcid = __le16_to_cpu(req->dcid); | |
3246 | ||
3247 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
3248 | ||
af05b30b GP |
3249 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
3250 | if (!sk) | |
1da177e4 LT |
3251 | return 0; |
3252 | ||
aca3192c YH |
3253 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
3254 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
3255 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
3256 | ||
3257 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3258 | ||
3259 | l2cap_chan_del(sk, ECONNRESET); | |
3260 | bh_unlock_sock(sk); | |
3261 | ||
3262 | l2cap_sock_kill(sk); | |
3263 | return 0; | |
3264 | } | |
3265 | ||
3266 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3267 | { | |
3268 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
3269 | u16 dcid, scid; | |
3270 | struct sock *sk; | |
3271 | ||
3272 | scid = __le16_to_cpu(rsp->scid); | |
3273 | dcid = __le16_to_cpu(rsp->dcid); | |
3274 | ||
3275 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
3276 | ||
af05b30b GP |
3277 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
3278 | if (!sk) | |
1da177e4 LT |
3279 | return 0; |
3280 | ||
3281 | l2cap_chan_del(sk, 0); | |
3282 | bh_unlock_sock(sk); | |
3283 | ||
3284 | l2cap_sock_kill(sk); | |
3285 | return 0; | |
3286 | } | |
3287 | ||
3288 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3289 | { | |
3290 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
3291 | u16 type; |
3292 | ||
3293 | type = __le16_to_cpu(req->type); | |
3294 | ||
3295 | BT_DBG("type 0x%4.4x", type); | |
3296 | ||
f0709e03 MH |
3297 | if (type == L2CAP_IT_FEAT_MASK) { |
3298 | u8 buf[8]; | |
44dd46de | 3299 | u32 feat_mask = l2cap_feat_mask; |
f0709e03 MH |
3300 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
3301 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
3302 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
44dd46de | 3303 | if (enable_ertm) |
fcc203c3 GP |
3304 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
3305 | | L2CAP_FEAT_FCS; | |
1b7bf4ed | 3306 | put_unaligned_le32(feat_mask, rsp->data); |
f0709e03 MH |
3307 | l2cap_send_cmd(conn, cmd->ident, |
3308 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
e1027a7c MH |
3309 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
3310 | u8 buf[12]; | |
3311 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
3312 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
3313 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
3314 | memcpy(buf + 4, l2cap_fixed_chan, 8); | |
3315 | l2cap_send_cmd(conn, cmd->ident, | |
3316 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
f0709e03 MH |
3317 | } else { |
3318 | struct l2cap_info_rsp rsp; | |
3319 | rsp.type = cpu_to_le16(type); | |
3320 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
3321 | l2cap_send_cmd(conn, cmd->ident, | |
3322 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
3323 | } | |
1da177e4 LT |
3324 | |
3325 | return 0; | |
3326 | } | |
3327 | ||
3328 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3329 | { | |
3330 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
3331 | u16 type, result; | |
3332 | ||
3333 | type = __le16_to_cpu(rsp->type); | |
3334 | result = __le16_to_cpu(rsp->result); | |
3335 | ||
3336 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
3337 | ||
4e8402a3 MH |
3338 | del_timer(&conn->info_timer); |
3339 | ||
984947dc | 3340 | if (type == L2CAP_IT_FEAT_MASK) { |
83985319 | 3341 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 | 3342 | |
47ec1dcd | 3343 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
e1027a7c MH |
3344 | struct l2cap_info_req req; |
3345 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
3346 | ||
3347 | conn->info_ident = l2cap_get_ident(conn); | |
3348 | ||
3349 | l2cap_send_cmd(conn, conn->info_ident, | |
3350 | L2CAP_INFO_REQ, sizeof(req), &req); | |
3351 | } else { | |
3352 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
3353 | conn->info_ident = 0; | |
3354 | ||
3355 | l2cap_conn_start(conn); | |
3356 | } | |
3357 | } else if (type == L2CAP_IT_FIXED_CHAN) { | |
984947dc | 3358 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 3359 | conn->info_ident = 0; |
984947dc MH |
3360 | |
3361 | l2cap_conn_start(conn); | |
3362 | } | |
4e8402a3 | 3363 | |
1da177e4 LT |
3364 | return 0; |
3365 | } | |
3366 | ||
3367 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
3368 | { | |
3369 | u8 *data = skb->data; | |
3370 | int len = skb->len; | |
3371 | struct l2cap_cmd_hdr cmd; | |
3372 | int err = 0; | |
3373 | ||
3374 | l2cap_raw_recv(conn, skb); | |
3375 | ||
3376 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 3377 | u16 cmd_len; |
1da177e4 LT |
3378 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
3379 | data += L2CAP_CMD_HDR_SIZE; | |
3380 | len -= L2CAP_CMD_HDR_SIZE; | |
3381 | ||
88219a0f | 3382 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 3383 | |
88219a0f | 3384 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 3385 | |
88219a0f | 3386 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
3387 | BT_DBG("corrupted command"); |
3388 | break; | |
3389 | } | |
3390 | ||
3391 | switch (cmd.code) { | |
3392 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 3393 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
3394 | break; |
3395 | ||
3396 | case L2CAP_CONN_REQ: | |
3397 | err = l2cap_connect_req(conn, &cmd, data); | |
3398 | break; | |
3399 | ||
3400 | case L2CAP_CONN_RSP: | |
3401 | err = l2cap_connect_rsp(conn, &cmd, data); | |
3402 | break; | |
3403 | ||
3404 | case L2CAP_CONF_REQ: | |
88219a0f | 3405 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
3406 | break; |
3407 | ||
3408 | case L2CAP_CONF_RSP: | |
3409 | err = l2cap_config_rsp(conn, &cmd, data); | |
3410 | break; | |
3411 | ||
3412 | case L2CAP_DISCONN_REQ: | |
3413 | err = l2cap_disconnect_req(conn, &cmd, data); | |
3414 | break; | |
3415 | ||
3416 | case L2CAP_DISCONN_RSP: | |
3417 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
3418 | break; | |
3419 | ||
3420 | case L2CAP_ECHO_REQ: | |
88219a0f | 3421 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
3422 | break; |
3423 | ||
3424 | case L2CAP_ECHO_RSP: | |
3425 | break; | |
3426 | ||
3427 | case L2CAP_INFO_REQ: | |
3428 | err = l2cap_information_req(conn, &cmd, data); | |
3429 | break; | |
3430 | ||
3431 | case L2CAP_INFO_RSP: | |
3432 | err = l2cap_information_rsp(conn, &cmd, data); | |
3433 | break; | |
3434 | ||
3435 | default: | |
3436 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
3437 | err = -EINVAL; | |
3438 | break; | |
3439 | } | |
3440 | ||
3441 | if (err) { | |
3442 | struct l2cap_cmd_rej rej; | |
3443 | BT_DBG("error %d", err); | |
3444 | ||
3445 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 3446 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
3447 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
3448 | } | |
3449 | ||
88219a0f AV |
3450 | data += cmd_len; |
3451 | len -= cmd_len; | |
1da177e4 LT |
3452 | } |
3453 | ||
3454 | kfree_skb(skb); | |
3455 | } | |
3456 | ||
fcc203c3 GP |
3457 | static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb) |
3458 | { | |
3459 | u16 our_fcs, rcv_fcs; | |
3460 | int hdr_size = L2CAP_HDR_SIZE + 2; | |
3461 | ||
3462 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
3463 | skb_trim(skb, skb->len - 2); | |
3464 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); | |
3465 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); | |
3466 | ||
3467 | if (our_fcs != rcv_fcs) | |
7a560e5c | 3468 | return -EBADMSG; |
fcc203c3 GP |
3469 | } |
3470 | return 0; | |
3471 | } | |
3472 | ||
d5392c8f GP |
3473 | static inline void l2cap_send_i_or_rr_or_rnr(struct sock *sk) |
3474 | { | |
3475 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3476 | u16 control = 0; | |
3477 | ||
3478 | pi->frames_sent = 0; | |
d5392c8f GP |
3479 | |
3480 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3481 | ||
3482 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
64988868 | 3483 | control |= L2CAP_SUPER_RCV_NOT_READY; |
d5392c8f | 3484 | l2cap_send_sframe(pi, control); |
1890d36b | 3485 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
d5392c8f GP |
3486 | } |
3487 | ||
4ea727ef GP |
3488 | if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY) |
3489 | l2cap_retransmit_frames(sk); | |
d5392c8f GP |
3490 | |
3491 | l2cap_ertm_send(sk); | |
3492 | ||
3493 | if (!(pi->conn_state & L2CAP_CONN_LOCAL_BUSY) && | |
3494 | pi->frames_sent == 0) { | |
3495 | control |= L2CAP_SUPER_RCV_READY; | |
d5392c8f GP |
3496 | l2cap_send_sframe(pi, control); |
3497 | } | |
3498 | } | |
3499 | ||
9b53350d | 3500 | static int l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar) |
8f17154f GP |
3501 | { |
3502 | struct sk_buff *next_skb; | |
bfbacc11 JPRV |
3503 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
3504 | int tx_seq_offset, next_tx_seq_offset; | |
8f17154f GP |
3505 | |
3506 | bt_cb(skb)->tx_seq = tx_seq; | |
3507 | bt_cb(skb)->sar = sar; | |
3508 | ||
3509 | next_skb = skb_peek(SREJ_QUEUE(sk)); | |
3510 | if (!next_skb) { | |
3511 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
9b53350d | 3512 | return 0; |
8f17154f GP |
3513 | } |
3514 | ||
bfbacc11 JPRV |
3515 | tx_seq_offset = (tx_seq - pi->buffer_seq) % 64; |
3516 | if (tx_seq_offset < 0) | |
3517 | tx_seq_offset += 64; | |
3518 | ||
8f17154f | 3519 | do { |
9b53350d JPRV |
3520 | if (bt_cb(next_skb)->tx_seq == tx_seq) |
3521 | return -EINVAL; | |
3522 | ||
bfbacc11 JPRV |
3523 | next_tx_seq_offset = (bt_cb(next_skb)->tx_seq - |
3524 | pi->buffer_seq) % 64; | |
3525 | if (next_tx_seq_offset < 0) | |
3526 | next_tx_seq_offset += 64; | |
3527 | ||
3528 | if (next_tx_seq_offset > tx_seq_offset) { | |
8f17154f | 3529 | __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb); |
9b53350d | 3530 | return 0; |
8f17154f GP |
3531 | } |
3532 | ||
3533 | if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb)) | |
3534 | break; | |
3535 | ||
59203a21 | 3536 | } while ((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb))); |
8f17154f GP |
3537 | |
3538 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
9b53350d JPRV |
3539 | |
3540 | return 0; | |
8f17154f GP |
3541 | } |
3542 | ||
18778a63 GP |
3543 | static int l2cap_ertm_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
3544 | { | |
3545 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3546 | struct sk_buff *_skb; | |
1890d36b | 3547 | int err; |
18778a63 GP |
3548 | |
3549 | switch (control & L2CAP_CTRL_SAR) { | |
3550 | case L2CAP_SDU_UNSEGMENTED: | |
3551 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) | |
3552 | goto drop; | |
3553 | ||
3554 | err = sock_queue_rcv_skb(sk, skb); | |
3555 | if (!err) | |
3556 | return err; | |
3557 | ||
3558 | break; | |
3559 | ||
3560 | case L2CAP_SDU_START: | |
3561 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) | |
3562 | goto drop; | |
3563 | ||
3564 | pi->sdu_len = get_unaligned_le16(skb->data); | |
18778a63 GP |
3565 | |
3566 | if (pi->sdu_len > pi->imtu) | |
3567 | goto disconnect; | |
3568 | ||
3569 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); | |
1890d36b GP |
3570 | if (!pi->sdu) |
3571 | return -ENOMEM; | |
3572 | ||
3573 | /* pull sdu_len bytes only after alloc, because of Local Busy | |
3574 | * condition we have to be sure that this will be executed | |
3575 | * only once, i.e., when alloc does not fail */ | |
3576 | skb_pull(skb, 2); | |
18778a63 GP |
3577 | |
3578 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3579 | ||
3580 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3581 | pi->partial_sdu_len = skb->len; | |
3582 | break; | |
3583 | ||
3584 | case L2CAP_SDU_CONTINUE: | |
3585 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3586 | goto disconnect; | |
3587 | ||
3588 | if (!pi->sdu) | |
3589 | goto disconnect; | |
3590 | ||
18778a63 GP |
3591 | pi->partial_sdu_len += skb->len; |
3592 | if (pi->partial_sdu_len > pi->sdu_len) | |
3593 | goto drop; | |
3594 | ||
4178ba46 GP |
3595 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
3596 | ||
18778a63 GP |
3597 | break; |
3598 | ||
3599 | case L2CAP_SDU_END: | |
3600 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3601 | goto disconnect; | |
3602 | ||
3603 | if (!pi->sdu) | |
3604 | goto disconnect; | |
3605 | ||
1890d36b | 3606 | if (!(pi->conn_state & L2CAP_CONN_SAR_RETRY)) { |
1890d36b | 3607 | pi->partial_sdu_len += skb->len; |
18778a63 | 3608 | |
1890d36b GP |
3609 | if (pi->partial_sdu_len > pi->imtu) |
3610 | goto drop; | |
18778a63 | 3611 | |
1890d36b GP |
3612 | if (pi->partial_sdu_len != pi->sdu_len) |
3613 | goto drop; | |
4178ba46 GP |
3614 | |
3615 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
1890d36b | 3616 | } |
18778a63 GP |
3617 | |
3618 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
1890d36b GP |
3619 | if (!_skb) { |
3620 | pi->conn_state |= L2CAP_CONN_SAR_RETRY; | |
3621 | return -ENOMEM; | |
3622 | } | |
3623 | ||
18778a63 | 3624 | err = sock_queue_rcv_skb(sk, _skb); |
1890d36b | 3625 | if (err < 0) { |
18778a63 | 3626 | kfree_skb(_skb); |
1890d36b GP |
3627 | pi->conn_state |= L2CAP_CONN_SAR_RETRY; |
3628 | return err; | |
3629 | } | |
3630 | ||
3631 | pi->conn_state &= ~L2CAP_CONN_SAR_RETRY; | |
3632 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
18778a63 GP |
3633 | |
3634 | kfree_skb(pi->sdu); | |
3635 | break; | |
3636 | } | |
3637 | ||
3638 | kfree_skb(skb); | |
1890d36b | 3639 | return 0; |
18778a63 GP |
3640 | |
3641 | drop: | |
3642 | kfree_skb(pi->sdu); | |
3643 | pi->sdu = NULL; | |
3644 | ||
3645 | disconnect: | |
9b108fc0 | 3646 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); |
18778a63 GP |
3647 | kfree_skb(skb); |
3648 | return 0; | |
3649 | } | |
3650 | ||
712132eb GP |
3651 | static int l2cap_try_push_rx_skb(struct sock *sk) |
3652 | { | |
3653 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3654 | struct sk_buff *skb; | |
3655 | u16 control; | |
3656 | int err; | |
3657 | ||
3658 | while ((skb = skb_dequeue(BUSY_QUEUE(sk)))) { | |
3659 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; | |
3660 | err = l2cap_ertm_reassembly_sdu(sk, skb, control); | |
3661 | if (err < 0) { | |
3662 | skb_queue_head(BUSY_QUEUE(sk), skb); | |
3663 | return -EBUSY; | |
3664 | } | |
3665 | ||
3666 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; | |
3667 | } | |
3668 | ||
3669 | if (!(pi->conn_state & L2CAP_CONN_RNR_SENT)) | |
3670 | goto done; | |
3671 | ||
3672 | control = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3673 | control |= L2CAP_SUPER_RCV_READY | L2CAP_CTRL_POLL; | |
3674 | l2cap_send_sframe(pi, control); | |
3675 | l2cap_pi(sk)->retry_count = 1; | |
3676 | ||
3677 | del_timer(&pi->retrans_timer); | |
3678 | __mod_monitor_timer(); | |
3679 | ||
3680 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
3681 | ||
3682 | done: | |
3683 | pi->conn_state &= ~L2CAP_CONN_LOCAL_BUSY; | |
3684 | pi->conn_state &= ~L2CAP_CONN_RNR_SENT; | |
3685 | ||
3686 | BT_DBG("sk %p, Exit local busy", sk); | |
3687 | ||
3688 | return 0; | |
3689 | } | |
3690 | ||
1890d36b GP |
3691 | static void l2cap_busy_work(struct work_struct *work) |
3692 | { | |
3693 | DECLARE_WAITQUEUE(wait, current); | |
3694 | struct l2cap_pinfo *pi = | |
3695 | container_of(work, struct l2cap_pinfo, busy_work); | |
3696 | struct sock *sk = (struct sock *)pi; | |
3697 | int n_tries = 0, timeo = HZ/5, err; | |
3698 | struct sk_buff *skb; | |
1890d36b GP |
3699 | |
3700 | lock_sock(sk); | |
3701 | ||
2b0b05dd | 3702 | add_wait_queue(sk_sleep(sk), &wait); |
1890d36b GP |
3703 | while ((skb = skb_peek(BUSY_QUEUE(sk)))) { |
3704 | set_current_state(TASK_INTERRUPTIBLE); | |
3705 | ||
3706 | if (n_tries++ > L2CAP_LOCAL_BUSY_TRIES) { | |
3707 | err = -EBUSY; | |
9b108fc0 | 3708 | l2cap_send_disconn_req(pi->conn, sk, EBUSY); |
712132eb | 3709 | break; |
1890d36b GP |
3710 | } |
3711 | ||
3712 | if (!timeo) | |
3713 | timeo = HZ/5; | |
3714 | ||
3715 | if (signal_pending(current)) { | |
3716 | err = sock_intr_errno(timeo); | |
712132eb | 3717 | break; |
1890d36b GP |
3718 | } |
3719 | ||
3720 | release_sock(sk); | |
3721 | timeo = schedule_timeout(timeo); | |
3722 | lock_sock(sk); | |
3723 | ||
3724 | err = sock_error(sk); | |
3725 | if (err) | |
712132eb | 3726 | break; |
1890d36b | 3727 | |
712132eb | 3728 | if (l2cap_try_push_rx_skb(sk) == 0) |
1890d36b GP |
3729 | break; |
3730 | } | |
3731 | ||
1890d36b | 3732 | set_current_state(TASK_RUNNING); |
2b0b05dd | 3733 | remove_wait_queue(sk_sleep(sk), &wait); |
1890d36b GP |
3734 | |
3735 | release_sock(sk); | |
3736 | } | |
3737 | ||
3738 | static int l2cap_push_rx_skb(struct sock *sk, struct sk_buff *skb, u16 control) | |
3739 | { | |
3740 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3741 | int sctrl, err; | |
3742 | ||
3743 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
3744 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; | |
3745 | __skb_queue_tail(BUSY_QUEUE(sk), skb); | |
712132eb GP |
3746 | return l2cap_try_push_rx_skb(sk); |
3747 | ||
3748 | ||
1890d36b GP |
3749 | } |
3750 | ||
3751 | err = l2cap_ertm_reassembly_sdu(sk, skb, control); | |
3752 | if (err >= 0) { | |
3753 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; | |
3754 | return err; | |
3755 | } | |
3756 | ||
3757 | /* Busy Condition */ | |
0e98958d GP |
3758 | BT_DBG("sk %p, Enter local busy", sk); |
3759 | ||
1890d36b GP |
3760 | pi->conn_state |= L2CAP_CONN_LOCAL_BUSY; |
3761 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; | |
3762 | __skb_queue_tail(BUSY_QUEUE(sk), skb); | |
3763 | ||
3764 | sctrl = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3765 | sctrl |= L2CAP_SUPER_RCV_NOT_READY; | |
3766 | l2cap_send_sframe(pi, sctrl); | |
3767 | ||
3768 | pi->conn_state |= L2CAP_CONN_RNR_SENT; | |
3769 | ||
7fe9b298 GP |
3770 | del_timer(&pi->ack_timer); |
3771 | ||
1890d36b GP |
3772 | queue_work(_busy_wq, &pi->busy_work); |
3773 | ||
3774 | return err; | |
3775 | } | |
3776 | ||
18778a63 | 3777 | static int l2cap_streaming_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
c74e560c GP |
3778 | { |
3779 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3780 | struct sk_buff *_skb; | |
3781 | int err = -EINVAL; | |
3782 | ||
18778a63 GP |
3783 | /* |
3784 | * TODO: We have to notify the userland if some data is lost with the | |
3785 | * Streaming Mode. | |
3786 | */ | |
3787 | ||
c74e560c GP |
3788 | switch (control & L2CAP_CTRL_SAR) { |
3789 | case L2CAP_SDU_UNSEGMENTED: | |
3790 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3791 | kfree_skb(pi->sdu); | |
3792 | break; | |
3793 | } | |
3794 | ||
3795 | err = sock_queue_rcv_skb(sk, skb); | |
3796 | if (!err) | |
3797 | return 0; | |
3798 | ||
3799 | break; | |
3800 | ||
3801 | case L2CAP_SDU_START: | |
3802 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3803 | kfree_skb(pi->sdu); | |
3804 | break; | |
3805 | } | |
3806 | ||
3807 | pi->sdu_len = get_unaligned_le16(skb->data); | |
3808 | skb_pull(skb, 2); | |
3809 | ||
052897ca GP |
3810 | if (pi->sdu_len > pi->imtu) { |
3811 | err = -EMSGSIZE; | |
3812 | break; | |
3813 | } | |
3814 | ||
c74e560c GP |
3815 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); |
3816 | if (!pi->sdu) { | |
3817 | err = -ENOMEM; | |
3818 | break; | |
3819 | } | |
3820 | ||
3821 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3822 | ||
3823 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3824 | pi->partial_sdu_len = skb->len; | |
3825 | err = 0; | |
3826 | break; | |
3827 | ||
3828 | case L2CAP_SDU_CONTINUE: | |
3829 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3830 | break; | |
3831 | ||
3832 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3833 | ||
3834 | pi->partial_sdu_len += skb->len; | |
3835 | if (pi->partial_sdu_len > pi->sdu_len) | |
3836 | kfree_skb(pi->sdu); | |
3837 | else | |
3838 | err = 0; | |
3839 | ||
3840 | break; | |
3841 | ||
3842 | case L2CAP_SDU_END: | |
3843 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3844 | break; | |
3845 | ||
3846 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3847 | ||
3848 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
3849 | pi->partial_sdu_len += skb->len; | |
3850 | ||
36f2fd58 GP |
3851 | if (pi->partial_sdu_len > pi->imtu) |
3852 | goto drop; | |
3853 | ||
c74e560c GP |
3854 | if (pi->partial_sdu_len == pi->sdu_len) { |
3855 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
3856 | err = sock_queue_rcv_skb(sk, _skb); | |
3857 | if (err < 0) | |
3858 | kfree_skb(_skb); | |
3859 | } | |
c74e560c GP |
3860 | err = 0; |
3861 | ||
36f2fd58 GP |
3862 | drop: |
3863 | kfree_skb(pi->sdu); | |
c74e560c GP |
3864 | break; |
3865 | } | |
3866 | ||
3867 | kfree_skb(skb); | |
3868 | return err; | |
3869 | } | |
3870 | ||
8f17154f GP |
3871 | static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq) |
3872 | { | |
3873 | struct sk_buff *skb; | |
afefdbc4 | 3874 | u16 control; |
8f17154f | 3875 | |
59203a21 | 3876 | while ((skb = skb_peek(SREJ_QUEUE(sk)))) { |
8f17154f GP |
3877 | if (bt_cb(skb)->tx_seq != tx_seq) |
3878 | break; | |
3879 | ||
3880 | skb = skb_dequeue(SREJ_QUEUE(sk)); | |
afefdbc4 | 3881 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
18778a63 | 3882 | l2cap_ertm_reassembly_sdu(sk, skb, control); |
8f17154f GP |
3883 | l2cap_pi(sk)->buffer_seq_srej = |
3884 | (l2cap_pi(sk)->buffer_seq_srej + 1) % 64; | |
8ff50ec0 | 3885 | tx_seq = (tx_seq + 1) % 64; |
8f17154f GP |
3886 | } |
3887 | } | |
3888 | ||
3889 | static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq) | |
3890 | { | |
3891 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3892 | struct srej_list *l, *tmp; | |
3893 | u16 control; | |
3894 | ||
59203a21 | 3895 | list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) { |
8f17154f GP |
3896 | if (l->tx_seq == tx_seq) { |
3897 | list_del(&l->list); | |
3898 | kfree(l); | |
3899 | return; | |
3900 | } | |
3901 | control = L2CAP_SUPER_SELECT_REJECT; | |
3902 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3903 | l2cap_send_sframe(pi, control); | |
3904 | list_del(&l->list); | |
3905 | list_add_tail(&l->list, SREJ_LIST(sk)); | |
3906 | } | |
3907 | } | |
3908 | ||
3909 | static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) | |
3910 | { | |
3911 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3912 | struct srej_list *new; | |
3913 | u16 control; | |
3914 | ||
3915 | while (tx_seq != pi->expected_tx_seq) { | |
3916 | control = L2CAP_SUPER_SELECT_REJECT; | |
3917 | control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3918 | l2cap_send_sframe(pi, control); | |
3919 | ||
3920 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); | |
8ff50ec0 GP |
3921 | new->tx_seq = pi->expected_tx_seq; |
3922 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
8f17154f GP |
3923 | list_add_tail(&new->list, SREJ_LIST(sk)); |
3924 | } | |
8ff50ec0 | 3925 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; |
8f17154f GP |
3926 | } |
3927 | ||
1c2acffb GP |
3928 | static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
3929 | { | |
3930 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3931 | u8 tx_seq = __get_txseq(rx_control); | |
9f121a5a | 3932 | u8 req_seq = __get_reqseq(rx_control); |
8f17154f | 3933 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
f6337c77 | 3934 | int tx_seq_offset, expected_tx_seq_offset; |
803020c6 | 3935 | int num_to_ack = (pi->tx_win/6) + 1; |
1c2acffb GP |
3936 | int err = 0; |
3937 | ||
0e98958d GP |
3938 | BT_DBG("sk %p len %d tx_seq %d rx_control 0x%4.4x", sk, skb->len, tx_seq, |
3939 | rx_control); | |
1c2acffb | 3940 | |
9b16dc65 GP |
3941 | if (L2CAP_CTRL_FINAL & rx_control && |
3942 | l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) { | |
1d8f5d16 GP |
3943 | del_timer(&pi->monitor_timer); |
3944 | if (pi->unacked_frames > 0) | |
3945 | __mod_retrans_timer(); | |
3946 | pi->conn_state &= ~L2CAP_CONN_WAIT_F; | |
3947 | } | |
3948 | ||
9f121a5a GP |
3949 | pi->expected_ack_seq = req_seq; |
3950 | l2cap_drop_acked_frames(sk); | |
3951 | ||
8f17154f GP |
3952 | if (tx_seq == pi->expected_tx_seq) |
3953 | goto expected; | |
1c2acffb | 3954 | |
9b53350d JPRV |
3955 | tx_seq_offset = (tx_seq - pi->buffer_seq) % 64; |
3956 | if (tx_seq_offset < 0) | |
3957 | tx_seq_offset += 64; | |
3958 | ||
3959 | /* invalid tx_seq */ | |
3960 | if (tx_seq_offset >= pi->tx_win) { | |
9b108fc0 | 3961 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); |
9b53350d JPRV |
3962 | goto drop; |
3963 | } | |
3964 | ||
1890d36b GP |
3965 | if (pi->conn_state == L2CAP_CONN_LOCAL_BUSY) |
3966 | goto drop; | |
3967 | ||
8f17154f GP |
3968 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
3969 | struct srej_list *first; | |
30afb5b2 | 3970 | |
8f17154f GP |
3971 | first = list_first_entry(SREJ_LIST(sk), |
3972 | struct srej_list, list); | |
3973 | if (tx_seq == first->tx_seq) { | |
3974 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3975 | l2cap_check_srej_gap(sk, tx_seq); | |
3976 | ||
3977 | list_del(&first->list); | |
3978 | kfree(first); | |
3979 | ||
3980 | if (list_empty(SREJ_LIST(sk))) { | |
3981 | pi->buffer_seq = pi->buffer_seq_srej; | |
3982 | pi->conn_state &= ~L2CAP_CONN_SREJ_SENT; | |
855666cc | 3983 | l2cap_send_ack(pi); |
0e98958d | 3984 | BT_DBG("sk %p, Exit SREJ_SENT", sk); |
8f17154f GP |
3985 | } |
3986 | } else { | |
3987 | struct srej_list *l; | |
9b53350d JPRV |
3988 | |
3989 | /* duplicated tx_seq */ | |
3990 | if (l2cap_add_to_srej_queue(sk, skb, tx_seq, sar) < 0) | |
3991 | goto drop; | |
8f17154f GP |
3992 | |
3993 | list_for_each_entry(l, SREJ_LIST(sk), list) { | |
3994 | if (l->tx_seq == tx_seq) { | |
3995 | l2cap_resend_srejframe(sk, tx_seq); | |
3996 | return 0; | |
3997 | } | |
3998 | } | |
3999 | l2cap_send_srejframe(sk, tx_seq); | |
30afb5b2 GP |
4000 | } |
4001 | } else { | |
9b53350d JPRV |
4002 | expected_tx_seq_offset = |
4003 | (pi->expected_tx_seq - pi->buffer_seq) % 64; | |
4004 | if (expected_tx_seq_offset < 0) | |
4005 | expected_tx_seq_offset += 64; | |
4006 | ||
4007 | /* duplicated tx_seq */ | |
4008 | if (tx_seq_offset < expected_tx_seq_offset) | |
4009 | goto drop; | |
4010 | ||
8f17154f | 4011 | pi->conn_state |= L2CAP_CONN_SREJ_SENT; |
1c2acffb | 4012 | |
0e98958d GP |
4013 | BT_DBG("sk %p, Enter SREJ", sk); |
4014 | ||
8f17154f GP |
4015 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
4016 | pi->buffer_seq_srej = pi->buffer_seq; | |
4017 | ||
4018 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b | 4019 | __skb_queue_head_init(BUSY_QUEUE(sk)); |
8f17154f GP |
4020 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
4021 | ||
ef54fd93 GP |
4022 | pi->conn_state |= L2CAP_CONN_SEND_PBIT; |
4023 | ||
8f17154f | 4024 | l2cap_send_srejframe(sk, tx_seq); |
7fe9b298 GP |
4025 | |
4026 | del_timer(&pi->ack_timer); | |
1c2acffb | 4027 | } |
30afb5b2 GP |
4028 | return 0; |
4029 | ||
8f17154f GP |
4030 | expected: |
4031 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
4032 | ||
4033 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { | |
3b1a9f3f GP |
4034 | bt_cb(skb)->tx_seq = tx_seq; |
4035 | bt_cb(skb)->sar = sar; | |
4036 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
8f17154f GP |
4037 | return 0; |
4038 | } | |
4039 | ||
2ece3684 GP |
4040 | err = l2cap_push_rx_skb(sk, skb, rx_control); |
4041 | if (err < 0) | |
4042 | return 0; | |
4043 | ||
4ec10d97 GP |
4044 | if (rx_control & L2CAP_CTRL_FINAL) { |
4045 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
4046 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4047 | else |
4048 | l2cap_retransmit_frames(sk); | |
4ec10d97 GP |
4049 | } |
4050 | ||
c1b4f43b GP |
4051 | __mod_ack_timer(); |
4052 | ||
803020c6 GP |
4053 | pi->num_acked = (pi->num_acked + 1) % num_to_ack; |
4054 | if (pi->num_acked == num_to_ack - 1) | |
9e917af1 GP |
4055 | l2cap_send_ack(pi); |
4056 | ||
8f17154f | 4057 | return 0; |
9b53350d JPRV |
4058 | |
4059 | drop: | |
4060 | kfree_skb(skb); | |
4061 | return 0; | |
1c2acffb GP |
4062 | } |
4063 | ||
e072745f | 4064 | static inline void l2cap_data_channel_rrframe(struct sock *sk, u16 rx_control) |
1c2acffb GP |
4065 | { |
4066 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
6e3a5981 | 4067 | |
0e98958d GP |
4068 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, __get_reqseq(rx_control), |
4069 | rx_control); | |
4070 | ||
6e3a5981 GP |
4071 | pi->expected_ack_seq = __get_reqseq(rx_control); |
4072 | l2cap_drop_acked_frames(sk); | |
1c2acffb | 4073 | |
e072745f | 4074 | if (rx_control & L2CAP_CTRL_POLL) { |
3cb123d1 | 4075 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; |
05fbd89d GP |
4076 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
4077 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && | |
4078 | (pi->unacked_frames > 0)) | |
4079 | __mod_retrans_timer(); | |
4080 | ||
4081 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; | |
4082 | l2cap_send_srejtail(sk); | |
4083 | } else { | |
4084 | l2cap_send_i_or_rr_or_rnr(sk); | |
05fbd89d | 4085 | } |
1d8f5d16 | 4086 | |
e072745f GP |
4087 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
4088 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; | |
4ec10d97 | 4089 | |
e072745f GP |
4090 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
4091 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4092 | else |
4093 | l2cap_retransmit_frames(sk); | |
2246b2f1 | 4094 | |
e072745f | 4095 | } else { |
e072745f GP |
4096 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
4097 | (pi->unacked_frames > 0)) | |
4098 | __mod_retrans_timer(); | |
1c2acffb | 4099 | |
2246b2f1 | 4100 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
dfc909be | 4101 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
e072745f | 4102 | l2cap_send_ack(pi); |
dfc909be | 4103 | } else { |
e072745f | 4104 | l2cap_ertm_send(sk); |
dfc909be | 4105 | } |
e072745f GP |
4106 | } |
4107 | } | |
2246b2f1 | 4108 | |
e072745f GP |
4109 | static inline void l2cap_data_channel_rejframe(struct sock *sk, u16 rx_control) |
4110 | { | |
4111 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4112 | u8 tx_seq = __get_reqseq(rx_control); | |
30afb5b2 | 4113 | |
0e98958d GP |
4114 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4115 | ||
e072745f GP |
4116 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
4117 | ||
8abb52ee | 4118 | pi->expected_ack_seq = tx_seq; |
e072745f GP |
4119 | l2cap_drop_acked_frames(sk); |
4120 | ||
4121 | if (rx_control & L2CAP_CTRL_FINAL) { | |
4122 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
4123 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4124 | else |
4125 | l2cap_retransmit_frames(sk); | |
e072745f | 4126 | } else { |
dfc909be | 4127 | l2cap_retransmit_frames(sk); |
30afb5b2 | 4128 | |
0301ef04 | 4129 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
e072745f | 4130 | pi->conn_state |= L2CAP_CONN_REJ_ACT; |
e072745f GP |
4131 | } |
4132 | } | |
4133 | static inline void l2cap_data_channel_srejframe(struct sock *sk, u16 rx_control) | |
4134 | { | |
4135 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4136 | u8 tx_seq = __get_reqseq(rx_control); | |
30afb5b2 | 4137 | |
0e98958d GP |
4138 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4139 | ||
e072745f | 4140 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
2246b2f1 | 4141 | |
e072745f GP |
4142 | if (rx_control & L2CAP_CTRL_POLL) { |
4143 | pi->expected_ack_seq = tx_seq; | |
4144 | l2cap_drop_acked_frames(sk); | |
3cb123d1 GP |
4145 | |
4146 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; | |
dfc909be GP |
4147 | l2cap_retransmit_one_frame(sk, tx_seq); |
4148 | ||
e072745f | 4149 | l2cap_ertm_send(sk); |
dfc909be | 4150 | |
e072745f GP |
4151 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
4152 | pi->srej_save_reqseq = tx_seq; | |
4153 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
ef54fd93 | 4154 | } |
e072745f GP |
4155 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
4156 | if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && | |
4157 | pi->srej_save_reqseq == tx_seq) | |
4158 | pi->conn_state &= ~L2CAP_CONN_SREJ_ACT; | |
4159 | else | |
dfc909be | 4160 | l2cap_retransmit_one_frame(sk, tx_seq); |
e072745f | 4161 | } else { |
dfc909be | 4162 | l2cap_retransmit_one_frame(sk, tx_seq); |
e072745f GP |
4163 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
4164 | pi->srej_save_reqseq = tx_seq; | |
4165 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
ef54fd93 | 4166 | } |
e072745f GP |
4167 | } |
4168 | } | |
4169 | ||
4170 | static inline void l2cap_data_channel_rnrframe(struct sock *sk, u16 rx_control) | |
4171 | { | |
4172 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4173 | u8 tx_seq = __get_reqseq(rx_control); | |
4174 | ||
0e98958d GP |
4175 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4176 | ||
e072745f GP |
4177 | pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; |
4178 | pi->expected_ack_seq = tx_seq; | |
4179 | l2cap_drop_acked_frames(sk); | |
4180 | ||
3cb123d1 GP |
4181 | if (rx_control & L2CAP_CTRL_POLL) |
4182 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; | |
4183 | ||
99b0d4b7 GP |
4184 | if (!(pi->conn_state & L2CAP_CONN_SREJ_SENT)) { |
4185 | del_timer(&pi->retrans_timer); | |
a2e12a2a GP |
4186 | if (rx_control & L2CAP_CTRL_POLL) |
4187 | l2cap_send_rr_or_rnr(pi, L2CAP_CTRL_FINAL); | |
99b0d4b7 | 4188 | return; |
e072745f | 4189 | } |
99b0d4b7 GP |
4190 | |
4191 | if (rx_control & L2CAP_CTRL_POLL) | |
4192 | l2cap_send_srejtail(sk); | |
4193 | else | |
4194 | l2cap_send_sframe(pi, L2CAP_SUPER_RCV_READY); | |
e072745f GP |
4195 | } |
4196 | ||
4197 | static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) | |
4198 | { | |
4199 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
4200 | ||
9b16dc65 GP |
4201 | if (L2CAP_CTRL_FINAL & rx_control && |
4202 | l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) { | |
e072745f GP |
4203 | del_timer(&l2cap_pi(sk)->monitor_timer); |
4204 | if (l2cap_pi(sk)->unacked_frames > 0) | |
4205 | __mod_retrans_timer(); | |
4206 | l2cap_pi(sk)->conn_state &= ~L2CAP_CONN_WAIT_F; | |
4207 | } | |
4208 | ||
4209 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { | |
4210 | case L2CAP_SUPER_RCV_READY: | |
4211 | l2cap_data_channel_rrframe(sk, rx_control); | |
8f17154f GP |
4212 | break; |
4213 | ||
e072745f GP |
4214 | case L2CAP_SUPER_REJECT: |
4215 | l2cap_data_channel_rejframe(sk, rx_control); | |
4216 | break; | |
2246b2f1 | 4217 | |
e072745f GP |
4218 | case L2CAP_SUPER_SELECT_REJECT: |
4219 | l2cap_data_channel_srejframe(sk, rx_control); | |
4220 | break; | |
4221 | ||
4222 | case L2CAP_SUPER_RCV_NOT_READY: | |
4223 | l2cap_data_channel_rnrframe(sk, rx_control); | |
1c2acffb GP |
4224 | break; |
4225 | } | |
4226 | ||
faaebd19 | 4227 | kfree_skb(skb); |
1c2acffb GP |
4228 | return 0; |
4229 | } | |
4230 | ||
218bb9df GP |
4231 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb) |
4232 | { | |
4233 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4234 | u16 control; | |
4235 | u8 req_seq; | |
4236 | int len, next_tx_seq_offset, req_seq_offset; | |
4237 | ||
4238 | control = get_unaligned_le16(skb->data); | |
4239 | skb_pull(skb, 2); | |
4240 | len = skb->len; | |
4241 | ||
4242 | /* | |
4243 | * We can just drop the corrupted I-frame here. | |
4244 | * Receiver will miss it and start proper recovery | |
4245 | * procedures and ask retransmission. | |
4246 | */ | |
4247 | if (l2cap_check_fcs(pi, skb)) | |
4248 | goto drop; | |
4249 | ||
4250 | if (__is_sar_start(control) && __is_iframe(control)) | |
4251 | len -= 2; | |
4252 | ||
4253 | if (pi->fcs == L2CAP_FCS_CRC16) | |
4254 | len -= 2; | |
4255 | ||
4256 | if (len > pi->mps) { | |
4257 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4258 | goto drop; | |
4259 | } | |
4260 | ||
4261 | req_seq = __get_reqseq(control); | |
4262 | req_seq_offset = (req_seq - pi->expected_ack_seq) % 64; | |
4263 | if (req_seq_offset < 0) | |
4264 | req_seq_offset += 64; | |
4265 | ||
4266 | next_tx_seq_offset = | |
4267 | (pi->next_tx_seq - pi->expected_ack_seq) % 64; | |
4268 | if (next_tx_seq_offset < 0) | |
4269 | next_tx_seq_offset += 64; | |
4270 | ||
4271 | /* check for invalid req-seq */ | |
4272 | if (req_seq_offset > next_tx_seq_offset) { | |
4273 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4274 | goto drop; | |
4275 | } | |
4276 | ||
4277 | if (__is_iframe(control)) { | |
4278 | if (len < 0) { | |
4279 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4280 | goto drop; | |
4281 | } | |
4282 | ||
4283 | l2cap_data_channel_iframe(sk, control, skb); | |
4284 | } else { | |
4285 | if (len != 0) { | |
4286 | BT_ERR("%d", len); | |
4287 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4288 | goto drop; | |
4289 | } | |
4290 | ||
4291 | l2cap_data_channel_sframe(sk, control, skb); | |
4292 | } | |
4293 | ||
4294 | return 0; | |
4295 | ||
4296 | drop: | |
4297 | kfree_skb(skb); | |
4298 | return 0; | |
4299 | } | |
4300 | ||
1da177e4 LT |
4301 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
4302 | { | |
4303 | struct sock *sk; | |
6840ed07 | 4304 | struct l2cap_pinfo *pi; |
51893f88 | 4305 | u16 control; |
218bb9df GP |
4306 | u8 tx_seq; |
4307 | int len; | |
1da177e4 LT |
4308 | |
4309 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
4310 | if (!sk) { | |
4311 | BT_DBG("unknown cid 0x%4.4x", cid); | |
4312 | goto drop; | |
4313 | } | |
4314 | ||
6840ed07 GP |
4315 | pi = l2cap_pi(sk); |
4316 | ||
1da177e4 LT |
4317 | BT_DBG("sk %p, len %d", sk, skb->len); |
4318 | ||
4319 | if (sk->sk_state != BT_CONNECTED) | |
4320 | goto drop; | |
4321 | ||
6840ed07 | 4322 | switch (pi->mode) { |
1c2acffb GP |
4323 | case L2CAP_MODE_BASIC: |
4324 | /* If socket recv buffers overflows we drop data here | |
4325 | * which is *bad* because L2CAP has to be reliable. | |
4326 | * But we don't have any other choice. L2CAP doesn't | |
4327 | * provide flow control mechanism. */ | |
1da177e4 | 4328 | |
6840ed07 | 4329 | if (pi->imtu < skb->len) |
1c2acffb | 4330 | goto drop; |
1da177e4 | 4331 | |
1c2acffb GP |
4332 | if (!sock_queue_rcv_skb(sk, skb)) |
4333 | goto done; | |
4334 | break; | |
4335 | ||
4336 | case L2CAP_MODE_ERTM: | |
218bb9df GP |
4337 | if (!sock_owned_by_user(sk)) { |
4338 | l2cap_ertm_data_rcv(sk, skb); | |
277ffbe3 | 4339 | } else { |
218bb9df | 4340 | if (sk_add_backlog(sk, skb)) |
277ffbe3 | 4341 | goto drop; |
277ffbe3 | 4342 | } |
1c2acffb | 4343 | |
fcafde2e | 4344 | goto done; |
1c2acffb | 4345 | |
6840ed07 GP |
4346 | case L2CAP_MODE_STREAMING: |
4347 | control = get_unaligned_le16(skb->data); | |
4348 | skb_pull(skb, 2); | |
4349 | len = skb->len; | |
4350 | ||
26000089 GP |
4351 | if (l2cap_check_fcs(pi, skb)) |
4352 | goto drop; | |
4353 | ||
6840ed07 GP |
4354 | if (__is_sar_start(control)) |
4355 | len -= 2; | |
4356 | ||
fcc203c3 GP |
4357 | if (pi->fcs == L2CAP_FCS_CRC16) |
4358 | len -= 2; | |
4359 | ||
51893f88 | 4360 | if (len > pi->mps || len < 0 || __is_sframe(control)) |
6840ed07 GP |
4361 | goto drop; |
4362 | ||
4363 | tx_seq = __get_txseq(control); | |
4364 | ||
4365 | if (pi->expected_tx_seq == tx_seq) | |
4366 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
4367 | else | |
7dffe421 | 4368 | pi->expected_tx_seq = (tx_seq + 1) % 64; |
6840ed07 | 4369 | |
18778a63 | 4370 | l2cap_streaming_reassembly_sdu(sk, skb, control); |
6840ed07 GP |
4371 | |
4372 | goto done; | |
4373 | ||
1c2acffb | 4374 | default: |
e8235c6b | 4375 | BT_DBG("sk %p: bad mode 0x%2.2x", sk, pi->mode); |
1c2acffb GP |
4376 | break; |
4377 | } | |
1da177e4 LT |
4378 | |
4379 | drop: | |
4380 | kfree_skb(skb); | |
4381 | ||
4382 | done: | |
0139418c MH |
4383 | if (sk) |
4384 | bh_unlock_sock(sk); | |
4385 | ||
1da177e4 LT |
4386 | return 0; |
4387 | } | |
4388 | ||
8e036fc3 | 4389 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
4390 | { |
4391 | struct sock *sk; | |
4392 | ||
4393 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
4394 | if (!sk) | |
4395 | goto drop; | |
4396 | ||
4397 | BT_DBG("sk %p, len %d", sk, skb->len); | |
4398 | ||
4399 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
4400 | goto drop; | |
4401 | ||
4402 | if (l2cap_pi(sk)->imtu < skb->len) | |
4403 | goto drop; | |
4404 | ||
4405 | if (!sock_queue_rcv_skb(sk, skb)) | |
4406 | goto done; | |
4407 | ||
4408 | drop: | |
4409 | kfree_skb(skb); | |
4410 | ||
4411 | done: | |
af05b30b GP |
4412 | if (sk) |
4413 | bh_unlock_sock(sk); | |
1da177e4 LT |
4414 | return 0; |
4415 | } | |
4416 | ||
4417 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
4418 | { | |
4419 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
4420 | u16 cid, len; |
4421 | __le16 psm; | |
1da177e4 LT |
4422 | |
4423 | skb_pull(skb, L2CAP_HDR_SIZE); | |
4424 | cid = __le16_to_cpu(lh->cid); | |
4425 | len = __le16_to_cpu(lh->len); | |
4426 | ||
1c2acffb GP |
4427 | if (len != skb->len) { |
4428 | kfree_skb(skb); | |
4429 | return; | |
4430 | } | |
4431 | ||
1da177e4 LT |
4432 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
4433 | ||
4434 | switch (cid) { | |
8db4dc46 | 4435 | case L2CAP_CID_SIGNALING: |
1da177e4 LT |
4436 | l2cap_sig_channel(conn, skb); |
4437 | break; | |
4438 | ||
8db4dc46 | 4439 | case L2CAP_CID_CONN_LESS: |
1b7bf4ed | 4440 | psm = get_unaligned_le16(skb->data); |
1da177e4 LT |
4441 | skb_pull(skb, 2); |
4442 | l2cap_conless_channel(conn, psm, skb); | |
4443 | break; | |
4444 | ||
4445 | default: | |
4446 | l2cap_data_channel(conn, cid, skb); | |
4447 | break; | |
4448 | } | |
4449 | } | |
4450 | ||
4451 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
4452 | ||
4453 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
4454 | { | |
4455 | int exact = 0, lm1 = 0, lm2 = 0; | |
4456 | register struct sock *sk; | |
4457 | struct hlist_node *node; | |
4458 | ||
4459 | if (type != ACL_LINK) | |
963cf687 | 4460 | return -EINVAL; |
1da177e4 LT |
4461 | |
4462 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
4463 | ||
4464 | /* Find listening sockets and check their link_mode */ | |
4465 | read_lock(&l2cap_sk_list.lock); | |
4466 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
4467 | if (sk->sk_state != BT_LISTEN) | |
4468 | continue; | |
4469 | ||
4470 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
4471 | lm1 |= HCI_LM_ACCEPT; |
4472 | if (l2cap_pi(sk)->role_switch) | |
4473 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 4474 | exact++; |
2af6b9d5 MH |
4475 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
4476 | lm2 |= HCI_LM_ACCEPT; | |
4477 | if (l2cap_pi(sk)->role_switch) | |
4478 | lm2 |= HCI_LM_MASTER; | |
4479 | } | |
1da177e4 LT |
4480 | } |
4481 | read_unlock(&l2cap_sk_list.lock); | |
4482 | ||
4483 | return exact ? lm1 : lm2; | |
4484 | } | |
4485 | ||
4486 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
4487 | { | |
0139418c MH |
4488 | struct l2cap_conn *conn; |
4489 | ||
1da177e4 LT |
4490 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
4491 | ||
4492 | if (hcon->type != ACL_LINK) | |
963cf687 | 4493 | return -EINVAL; |
1da177e4 LT |
4494 | |
4495 | if (!status) { | |
1da177e4 LT |
4496 | conn = l2cap_conn_add(hcon, status); |
4497 | if (conn) | |
4498 | l2cap_conn_ready(conn); | |
0139418c | 4499 | } else |
1da177e4 LT |
4500 | l2cap_conn_del(hcon, bt_err(status)); |
4501 | ||
4502 | return 0; | |
4503 | } | |
4504 | ||
2950f21a MH |
4505 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
4506 | { | |
4507 | struct l2cap_conn *conn = hcon->l2cap_data; | |
4508 | ||
4509 | BT_DBG("hcon %p", hcon); | |
4510 | ||
4511 | if (hcon->type != ACL_LINK || !conn) | |
4512 | return 0x13; | |
4513 | ||
4514 | return conn->disc_reason; | |
4515 | } | |
4516 | ||
4517 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) | |
1da177e4 LT |
4518 | { |
4519 | BT_DBG("hcon %p reason %d", hcon, reason); | |
4520 | ||
4521 | if (hcon->type != ACL_LINK) | |
963cf687 | 4522 | return -EINVAL; |
1da177e4 LT |
4523 | |
4524 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 4525 | |
1da177e4 LT |
4526 | return 0; |
4527 | } | |
4528 | ||
f62e4323 MH |
4529 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
4530 | { | |
bd3c9e25 | 4531 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) |
255c7601 MH |
4532 | return; |
4533 | ||
f62e4323 MH |
4534 | if (encrypt == 0x00) { |
4535 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { | |
4536 | l2cap_sock_clear_timer(sk); | |
4537 | l2cap_sock_set_timer(sk, HZ * 5); | |
4538 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
4539 | __l2cap_sock_close(sk, ECONNREFUSED); | |
4540 | } else { | |
4541 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) | |
4542 | l2cap_sock_clear_timer(sk); | |
4543 | } | |
4544 | } | |
4545 | ||
8c1b2355 | 4546 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
4547 | { |
4548 | struct l2cap_chan_list *l; | |
0139418c | 4549 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 4550 | struct sock *sk; |
1da177e4 | 4551 | |
0139418c | 4552 | if (!conn) |
1da177e4 | 4553 | return 0; |
0139418c | 4554 | |
1da177e4 LT |
4555 | l = &conn->chan_list; |
4556 | ||
4557 | BT_DBG("conn %p", conn); | |
4558 | ||
4559 | read_lock(&l->lock); | |
4560 | ||
4561 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
4562 | bh_lock_sock(sk); | |
4563 | ||
6a8d3010 MH |
4564 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
4565 | bh_unlock_sock(sk); | |
4566 | continue; | |
4567 | } | |
4568 | ||
f62e4323 | 4569 | if (!status && (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 4570 | sk->sk_state == BT_CONFIG)) { |
f62e4323 | 4571 | l2cap_check_encryption(sk, encrypt); |
9719f8af MH |
4572 | bh_unlock_sock(sk); |
4573 | continue; | |
4574 | } | |
4575 | ||
b1235d79 MH |
4576 | if (sk->sk_state == BT_CONNECT) { |
4577 | if (!status) { | |
4578 | struct l2cap_conn_req req; | |
4579 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
4580 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 4581 | |
b1235d79 | 4582 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
e501d055 | 4583 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 | 4584 | |
b1235d79 MH |
4585 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4586 | L2CAP_CONN_REQ, sizeof(req), &req); | |
4587 | } else { | |
4588 | l2cap_sock_clear_timer(sk); | |
4589 | l2cap_sock_set_timer(sk, HZ / 10); | |
4590 | } | |
4591 | } else if (sk->sk_state == BT_CONNECT2) { | |
4592 | struct l2cap_conn_rsp rsp; | |
4593 | __u16 result; | |
1da177e4 | 4594 | |
b1235d79 MH |
4595 | if (!status) { |
4596 | sk->sk_state = BT_CONFIG; | |
4597 | result = L2CAP_CR_SUCCESS; | |
4598 | } else { | |
4599 | sk->sk_state = BT_DISCONN; | |
4600 | l2cap_sock_set_timer(sk, HZ / 10); | |
4601 | result = L2CAP_CR_SEC_BLOCK; | |
4602 | } | |
4603 | ||
4604 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
4605 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
4606 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 4607 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
4608 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4609 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4610 | } | |
1da177e4 LT |
4611 | |
4612 | bh_unlock_sock(sk); | |
4613 | } | |
4614 | ||
4615 | read_unlock(&l->lock); | |
b1235d79 | 4616 | |
1da177e4 LT |
4617 | return 0; |
4618 | } | |
4619 | ||
4620 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
4621 | { | |
4622 | struct l2cap_conn *conn = hcon->l2cap_data; | |
4623 | ||
4624 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
4625 | goto drop; | |
4626 | ||
4627 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
4628 | ||
4629 | if (flags & ACL_START) { | |
4630 | struct l2cap_hdr *hdr; | |
4631 | int len; | |
4632 | ||
4633 | if (conn->rx_len) { | |
4634 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
4635 | kfree_skb(conn->rx_skb); | |
4636 | conn->rx_skb = NULL; | |
4637 | conn->rx_len = 0; | |
4638 | l2cap_conn_unreliable(conn, ECOMM); | |
4639 | } | |
4640 | ||
4641 | if (skb->len < 2) { | |
4642 | BT_ERR("Frame is too short (len %d)", skb->len); | |
4643 | l2cap_conn_unreliable(conn, ECOMM); | |
4644 | goto drop; | |
4645 | } | |
4646 | ||
4647 | hdr = (struct l2cap_hdr *) skb->data; | |
4648 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
4649 | ||
4650 | if (len == skb->len) { | |
4651 | /* Complete frame received */ | |
4652 | l2cap_recv_frame(conn, skb); | |
4653 | return 0; | |
4654 | } | |
4655 | ||
4656 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
4657 | ||
4658 | if (skb->len > len) { | |
4659 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
4660 | skb->len, len); | |
4661 | l2cap_conn_unreliable(conn, ECOMM); | |
4662 | goto drop; | |
4663 | } | |
4664 | ||
4665 | /* Allocate skb for the complete frame (with header) */ | |
af05b30b GP |
4666 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
4667 | if (!conn->rx_skb) | |
1da177e4 LT |
4668 | goto drop; |
4669 | ||
d626f62b | 4670 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 4671 | skb->len); |
1da177e4 LT |
4672 | conn->rx_len = len - skb->len; |
4673 | } else { | |
4674 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
4675 | ||
4676 | if (!conn->rx_len) { | |
4677 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
4678 | l2cap_conn_unreliable(conn, ECOMM); | |
4679 | goto drop; | |
4680 | } | |
4681 | ||
4682 | if (skb->len > conn->rx_len) { | |
4683 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
4684 | skb->len, conn->rx_len); | |
4685 | kfree_skb(conn->rx_skb); | |
4686 | conn->rx_skb = NULL; | |
4687 | conn->rx_len = 0; | |
4688 | l2cap_conn_unreliable(conn, ECOMM); | |
4689 | goto drop; | |
4690 | } | |
4691 | ||
d626f62b | 4692 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 4693 | skb->len); |
1da177e4 LT |
4694 | conn->rx_len -= skb->len; |
4695 | ||
4696 | if (!conn->rx_len) { | |
4697 | /* Complete frame received */ | |
4698 | l2cap_recv_frame(conn, conn->rx_skb); | |
4699 | conn->rx_skb = NULL; | |
4700 | } | |
4701 | } | |
4702 | ||
4703 | drop: | |
4704 | kfree_skb(skb); | |
4705 | return 0; | |
4706 | } | |
4707 | ||
aef7d97c | 4708 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
4709 | { |
4710 | struct sock *sk; | |
4711 | struct hlist_node *node; | |
1da177e4 LT |
4712 | |
4713 | read_lock_bh(&l2cap_sk_list.lock); | |
4714 | ||
be9d1227 MH |
4715 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
4716 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
101545f6 | 4717 | |
aef7d97c MH |
4718 | seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
4719 | batostr(&bt_sk(sk)->src), | |
4720 | batostr(&bt_sk(sk)->dst), | |
4721 | sk->sk_state, __le16_to_cpu(pi->psm), | |
4722 | pi->scid, pi->dcid, | |
4723 | pi->imtu, pi->omtu, pi->sec_level); | |
be9d1227 | 4724 | } |
1da177e4 | 4725 | |
1da177e4 | 4726 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 4727 | |
aef7d97c | 4728 | return 0; |
1da177e4 LT |
4729 | } |
4730 | ||
aef7d97c MH |
4731 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
4732 | { | |
4733 | return single_open(file, l2cap_debugfs_show, inode->i_private); | |
4734 | } | |
4735 | ||
4736 | static const struct file_operations l2cap_debugfs_fops = { | |
4737 | .open = l2cap_debugfs_open, | |
4738 | .read = seq_read, | |
4739 | .llseek = seq_lseek, | |
4740 | .release = single_release, | |
4741 | }; | |
4742 | ||
4743 | static struct dentry *l2cap_debugfs; | |
1da177e4 | 4744 | |
90ddc4f0 | 4745 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
4746 | .family = PF_BLUETOOTH, |
4747 | .owner = THIS_MODULE, | |
4748 | .release = l2cap_sock_release, | |
4749 | .bind = l2cap_sock_bind, | |
4750 | .connect = l2cap_sock_connect, | |
4751 | .listen = l2cap_sock_listen, | |
4752 | .accept = l2cap_sock_accept, | |
4753 | .getname = l2cap_sock_getname, | |
4754 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 4755 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 4756 | .poll = bt_sock_poll, |
3241ad82 | 4757 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
4758 | .mmap = sock_no_mmap, |
4759 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
4760 | .shutdown = l2cap_sock_shutdown, |
4761 | .setsockopt = l2cap_sock_setsockopt, | |
4762 | .getsockopt = l2cap_sock_getsockopt | |
4763 | }; | |
4764 | ||
ec1b4cf7 | 4765 | static const struct net_proto_family l2cap_sock_family_ops = { |
1da177e4 LT |
4766 | .family = PF_BLUETOOTH, |
4767 | .owner = THIS_MODULE, | |
4768 | .create = l2cap_sock_create, | |
4769 | }; | |
4770 | ||
4771 | static struct hci_proto l2cap_hci_proto = { | |
4772 | .name = "L2CAP", | |
4773 | .id = HCI_PROTO_L2CAP, | |
4774 | .connect_ind = l2cap_connect_ind, | |
4775 | .connect_cfm = l2cap_connect_cfm, | |
4776 | .disconn_ind = l2cap_disconn_ind, | |
2950f21a | 4777 | .disconn_cfm = l2cap_disconn_cfm, |
8c1b2355 | 4778 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
4779 | .recv_acldata = l2cap_recv_acldata |
4780 | }; | |
4781 | ||
4782 | static int __init l2cap_init(void) | |
4783 | { | |
4784 | int err; | |
be9d1227 | 4785 | |
1da177e4 LT |
4786 | err = proto_register(&l2cap_proto, 0); |
4787 | if (err < 0) | |
4788 | return err; | |
4789 | ||
1890d36b GP |
4790 | _busy_wq = create_singlethread_workqueue("l2cap"); |
4791 | if (!_busy_wq) | |
4792 | goto error; | |
4793 | ||
1da177e4 LT |
4794 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
4795 | if (err < 0) { | |
4796 | BT_ERR("L2CAP socket registration failed"); | |
4797 | goto error; | |
4798 | } | |
4799 | ||
4800 | err = hci_register_proto(&l2cap_hci_proto); | |
4801 | if (err < 0) { | |
4802 | BT_ERR("L2CAP protocol registration failed"); | |
4803 | bt_sock_unregister(BTPROTO_L2CAP); | |
4804 | goto error; | |
4805 | } | |
4806 | ||
aef7d97c MH |
4807 | if (bt_debugfs) { |
4808 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, | |
4809 | bt_debugfs, NULL, &l2cap_debugfs_fops); | |
4810 | if (!l2cap_debugfs) | |
4811 | BT_ERR("Failed to create L2CAP debug file"); | |
4812 | } | |
1da177e4 LT |
4813 | |
4814 | BT_INFO("L2CAP ver %s", VERSION); | |
4815 | BT_INFO("L2CAP socket layer initialized"); | |
4816 | ||
4817 | return 0; | |
4818 | ||
4819 | error: | |
4820 | proto_unregister(&l2cap_proto); | |
4821 | return err; | |
4822 | } | |
4823 | ||
4824 | static void __exit l2cap_exit(void) | |
4825 | { | |
aef7d97c | 4826 | debugfs_remove(l2cap_debugfs); |
1da177e4 | 4827 | |
1890d36b GP |
4828 | flush_workqueue(_busy_wq); |
4829 | destroy_workqueue(_busy_wq); | |
4830 | ||
1da177e4 LT |
4831 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
4832 | BT_ERR("L2CAP socket unregistration failed"); | |
4833 | ||
4834 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
4835 | BT_ERR("L2CAP protocol unregistration failed"); | |
4836 | ||
4837 | proto_unregister(&l2cap_proto); | |
4838 | } | |
4839 | ||
4840 | void l2cap_load(void) | |
4841 | { | |
4842 | /* Dummy function to trigger automatic L2CAP module loading by | |
4843 | * other modules that use L2CAP sockets but don't use any other | |
4844 | * symbols from it. */ | |
1da177e4 LT |
4845 | } |
4846 | EXPORT_SYMBOL(l2cap_load); | |
4847 | ||
4848 | module_init(l2cap_init); | |
4849 | module_exit(l2cap_exit); | |
4850 | ||
44dd46de MH |
4851 | module_param(enable_ertm, bool, 0644); |
4852 | MODULE_PARM_DESC(enable_ertm, "Enable enhanced retransmission mode"); | |
4853 | ||
63fbd24e | 4854 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
4855 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
4856 | MODULE_VERSION(VERSION); | |
4857 | MODULE_LICENSE("GPL"); | |
4858 | MODULE_ALIAS("bt-proto-0"); |