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Commit | Line | Data |
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8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
ce5706bd | 4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> |
5d8868ff | 5 | Copyright (C) 2010 Google Inc. |
1da177e4 LT |
6 | |
7 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License version 2 as | |
11 | published by the Free Software Foundation; | |
12 | ||
13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
14 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
16 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
17 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
18 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
19 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
20 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
21 | ||
8e87d142 YH |
22 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
23 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
24 | SOFTWARE IS DISCLAIMED. |
25 | */ | |
26 | ||
27 | /* Bluetooth L2CAP core and sockets. */ | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | ||
31 | #include <linux/types.h> | |
4fc268d2 | 32 | #include <linux/capability.h> |
1da177e4 LT |
33 | #include <linux/errno.h> |
34 | #include <linux/kernel.h> | |
1da177e4 LT |
35 | #include <linux/sched.h> |
36 | #include <linux/slab.h> | |
37 | #include <linux/poll.h> | |
38 | #include <linux/fcntl.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/socket.h> | |
42 | #include <linux/skbuff.h> | |
1da177e4 | 43 | #include <linux/list.h> |
be9d1227 | 44 | #include <linux/device.h> |
aef7d97c MH |
45 | #include <linux/debugfs.h> |
46 | #include <linux/seq_file.h> | |
af05b30b | 47 | #include <linux/uaccess.h> |
fcc203c3 | 48 | #include <linux/crc16.h> |
1da177e4 LT |
49 | #include <net/sock.h> |
50 | ||
51 | #include <asm/system.h> | |
1da177e4 LT |
52 | #include <asm/unaligned.h> |
53 | ||
54 | #include <net/bluetooth/bluetooth.h> | |
55 | #include <net/bluetooth/hci_core.h> | |
56 | #include <net/bluetooth/l2cap.h> | |
57 | ||
dd135240 | 58 | #define VERSION "2.15" |
44dd46de | 59 | |
894718a6 | 60 | static int disable_ertm; |
f0709e03 | 61 | |
47ec1dcd | 62 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
e1027a7c | 63 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
1da177e4 | 64 | |
90ddc4f0 | 65 | static const struct proto_ops l2cap_sock_ops; |
1da177e4 | 66 | |
1890d36b GP |
67 | static struct workqueue_struct *_busy_wq; |
68 | ||
1da177e4 | 69 | static struct bt_sock_list l2cap_sk_list = { |
d5fb2962 | 70 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
1da177e4 LT |
71 | }; |
72 | ||
1890d36b GP |
73 | static void l2cap_busy_work(struct work_struct *work); |
74 | ||
1da177e4 LT |
75 | static void __l2cap_sock_close(struct sock *sk, int reason); |
76 | static void l2cap_sock_close(struct sock *sk); | |
77 | static void l2cap_sock_kill(struct sock *sk); | |
78 | ||
e9aeb2dd | 79 | static int l2cap_build_conf_req(struct sock *sk, void *data); |
1da177e4 LT |
80 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
81 | u8 code, u8 ident, u16 dlen, void *data); | |
82 | ||
218bb9df GP |
83 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb); |
84 | ||
1da177e4 | 85 | /* ---- L2CAP timers ---- */ |
940a9eea AE |
86 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) |
87 | { | |
88 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
89 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
90 | } | |
91 | ||
92 | static void l2cap_sock_clear_timer(struct sock *sk) | |
93 | { | |
94 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
95 | sk_stop_timer(sk, &sk->sk_timer); | |
96 | } | |
97 | ||
1da177e4 LT |
98 | static void l2cap_sock_timeout(unsigned long arg) |
99 | { | |
100 | struct sock *sk = (struct sock *) arg; | |
b1235d79 | 101 | int reason; |
1da177e4 LT |
102 | |
103 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
104 | ||
105 | bh_lock_sock(sk); | |
b1235d79 | 106 | |
940a9eea AE |
107 | if (sock_owned_by_user(sk)) { |
108 | /* sk is owned by user. Try again later */ | |
109 | l2cap_sock_set_timer(sk, HZ / 5); | |
110 | bh_unlock_sock(sk); | |
111 | sock_put(sk); | |
112 | return; | |
113 | } | |
114 | ||
f62e4323 MH |
115 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
116 | reason = ECONNREFUSED; | |
117 | else if (sk->sk_state == BT_CONNECT && | |
2af6b9d5 | 118 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
b1235d79 MH |
119 | reason = ECONNREFUSED; |
120 | else | |
121 | reason = ETIMEDOUT; | |
122 | ||
123 | __l2cap_sock_close(sk, reason); | |
124 | ||
1da177e4 LT |
125 | bh_unlock_sock(sk); |
126 | ||
127 | l2cap_sock_kill(sk); | |
128 | sock_put(sk); | |
129 | } | |
130 | ||
0139418c MH |
131 | /* ---- L2CAP channels ---- */ |
132 | static struct sock *__l2cap_get_chan_by_dcid(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)->dcid == cid) | |
137 | break; | |
138 | } | |
139 | return s; | |
140 | } | |
141 | ||
142 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
143 | { | |
144 | struct sock *s; | |
145 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
146 | if (l2cap_pi(s)->scid == cid) | |
147 | break; | |
148 | } | |
149 | return s; | |
150 | } | |
151 | ||
152 | /* Find channel with given SCID. | |
153 | * Returns locked socket */ | |
154 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
155 | { | |
156 | struct sock *s; | |
157 | read_lock(&l->lock); | |
158 | s = __l2cap_get_chan_by_scid(l, cid); | |
af05b30b GP |
159 | if (s) |
160 | bh_lock_sock(s); | |
0139418c MH |
161 | read_unlock(&l->lock); |
162 | return s; | |
163 | } | |
164 | ||
165 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
166 | { | |
167 | struct sock *s; | |
168 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
169 | if (l2cap_pi(s)->ident == ident) | |
170 | break; | |
171 | } | |
172 | return s; | |
173 | } | |
174 | ||
175 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
176 | { | |
177 | struct sock *s; | |
178 | read_lock(&l->lock); | |
179 | s = __l2cap_get_chan_by_ident(l, ident); | |
af05b30b GP |
180 | if (s) |
181 | bh_lock_sock(s); | |
0139418c MH |
182 | read_unlock(&l->lock); |
183 | return s; | |
184 | } | |
185 | ||
186 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
187 | { | |
8db4dc46 | 188 | u16 cid = L2CAP_CID_DYN_START; |
0139418c | 189 | |
8db4dc46 | 190 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
af05b30b | 191 | if (!__l2cap_get_chan_by_scid(l, cid)) |
0139418c MH |
192 | return cid; |
193 | } | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
199 | { | |
200 | sock_hold(sk); | |
201 | ||
202 | if (l->head) | |
203 | l2cap_pi(l->head)->prev_c = sk; | |
204 | ||
205 | l2cap_pi(sk)->next_c = l->head; | |
206 | l2cap_pi(sk)->prev_c = NULL; | |
207 | l->head = sk; | |
208 | } | |
209 | ||
210 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
211 | { | |
212 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
213 | ||
fd1278d7 | 214 | write_lock_bh(&l->lock); |
0139418c MH |
215 | if (sk == l->head) |
216 | l->head = next; | |
217 | ||
218 | if (next) | |
219 | l2cap_pi(next)->prev_c = prev; | |
220 | if (prev) | |
221 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 222 | write_unlock_bh(&l->lock); |
0139418c MH |
223 | |
224 | __sock_put(sk); | |
225 | } | |
226 | ||
227 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
228 | { | |
229 | struct l2cap_chan_list *l = &conn->chan_list; | |
230 | ||
af05b30b GP |
231 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
232 | l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
0139418c | 233 | |
2950f21a MH |
234 | conn->disc_reason = 0x13; |
235 | ||
0139418c MH |
236 | l2cap_pi(sk)->conn = conn; |
237 | ||
bd3c9e25 | 238 | if (sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) { |
0139418c MH |
239 | /* Alloc CID for connection-oriented socket */ |
240 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
241 | } else if (sk->sk_type == SOCK_DGRAM) { | |
242 | /* Connectionless socket */ | |
8db4dc46 GP |
243 | l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS; |
244 | l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS; | |
0139418c MH |
245 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
246 | } else { | |
247 | /* Raw socket can send/recv signalling messages only */ | |
8db4dc46 GP |
248 | l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING; |
249 | l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING; | |
0139418c MH |
250 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
251 | } | |
252 | ||
253 | __l2cap_chan_link(l, sk); | |
254 | ||
255 | if (parent) | |
256 | bt_accept_enqueue(parent, sk); | |
257 | } | |
258 | ||
8e87d142 | 259 | /* Delete channel. |
0139418c MH |
260 | * Must be called on the locked socket. */ |
261 | static void l2cap_chan_del(struct sock *sk, int err) | |
262 | { | |
263 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
264 | struct sock *parent = bt_sk(sk)->parent; | |
265 | ||
266 | l2cap_sock_clear_timer(sk); | |
267 | ||
268 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
269 | ||
8e87d142 | 270 | if (conn) { |
0139418c MH |
271 | /* Unlink from channel list */ |
272 | l2cap_chan_unlink(&conn->chan_list, sk); | |
273 | l2cap_pi(sk)->conn = NULL; | |
274 | hci_conn_put(conn->hcon); | |
275 | } | |
276 | ||
b1235d79 | 277 | sk->sk_state = BT_CLOSED; |
0139418c MH |
278 | sock_set_flag(sk, SOCK_ZAPPED); |
279 | ||
280 | if (err) | |
281 | sk->sk_err = err; | |
282 | ||
283 | if (parent) { | |
284 | bt_accept_unlink(sk); | |
285 | parent->sk_data_ready(parent, 0); | |
286 | } else | |
287 | sk->sk_state_change(sk); | |
c13ffa62 GP |
288 | |
289 | skb_queue_purge(TX_QUEUE(sk)); | |
290 | ||
291 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
292 | struct srej_list *l, *tmp; | |
293 | ||
294 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
295 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
296 | del_timer(&l2cap_pi(sk)->ack_timer); | |
297 | ||
298 | skb_queue_purge(SREJ_QUEUE(sk)); | |
299 | skb_queue_purge(BUSY_QUEUE(sk)); | |
300 | ||
301 | list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) { | |
302 | list_del(&l->list); | |
303 | kfree(l); | |
304 | } | |
305 | } | |
0139418c MH |
306 | } |
307 | ||
79d554a6 | 308 | /* Service level security */ |
2af6b9d5 | 309 | static inline int l2cap_check_security(struct sock *sk) |
79d554a6 MH |
310 | { |
311 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
0684e5f9 MH |
312 | __u8 auth_type; |
313 | ||
00ae4af9 MH |
314 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
315 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
316 | auth_type = HCI_AT_NO_BONDING_MITM; | |
317 | else | |
af05b30b | 318 | auth_type = HCI_AT_NO_BONDING; |
00ae4af9 MH |
319 | |
320 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
321 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
322 | } else { | |
323 | switch (l2cap_pi(sk)->sec_level) { | |
324 | case BT_SECURITY_HIGH: | |
325 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
326 | break; | |
327 | case BT_SECURITY_MEDIUM: | |
328 | auth_type = HCI_AT_GENERAL_BONDING; | |
329 | break; | |
330 | default: | |
331 | auth_type = HCI_AT_NO_BONDING; | |
332 | break; | |
333 | } | |
0684e5f9 | 334 | } |
79d554a6 | 335 | |
0684e5f9 MH |
336 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
337 | auth_type); | |
79d554a6 MH |
338 | } |
339 | ||
4e8402a3 MH |
340 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
341 | { | |
342 | u8 id; | |
343 | ||
344 | /* Get next available identificator. | |
345 | * 1 - 128 are used by kernel. | |
346 | * 129 - 199 are reserved. | |
347 | * 200 - 254 are used by utilities like l2ping, etc. | |
348 | */ | |
349 | ||
350 | spin_lock_bh(&conn->lock); | |
351 | ||
352 | if (++conn->tx_ident > 128) | |
353 | conn->tx_ident = 1; | |
354 | ||
355 | id = conn->tx_ident; | |
356 | ||
357 | spin_unlock_bh(&conn->lock); | |
358 | ||
359 | return id; | |
360 | } | |
361 | ||
9a9c6a34 | 362 | static inline void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) |
4e8402a3 MH |
363 | { |
364 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
365 | ||
366 | BT_DBG("code 0x%2.2x", code); | |
367 | ||
368 | if (!skb) | |
9a9c6a34 | 369 | return; |
4e8402a3 | 370 | |
9a9c6a34 | 371 | hci_send_acl(conn->hcon, skb, 0); |
4e8402a3 MH |
372 | } |
373 | ||
9a9c6a34 | 374 | static inline void l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control) |
1c2acffb GP |
375 | { |
376 | struct sk_buff *skb; | |
377 | struct l2cap_hdr *lh; | |
378 | struct l2cap_conn *conn = pi->conn; | |
c13ffa62 | 379 | struct sock *sk = (struct sock *)pi; |
fcc203c3 GP |
380 | int count, hlen = L2CAP_HDR_SIZE + 2; |
381 | ||
c13ffa62 GP |
382 | if (sk->sk_state != BT_CONNECTED) |
383 | return; | |
384 | ||
fcc203c3 GP |
385 | if (pi->fcs == L2CAP_FCS_CRC16) |
386 | hlen += 2; | |
1c2acffb GP |
387 | |
388 | BT_DBG("pi %p, control 0x%2.2x", pi, control); | |
389 | ||
fcc203c3 | 390 | count = min_t(unsigned int, conn->mtu, hlen); |
1c2acffb GP |
391 | control |= L2CAP_CTRL_FRAME_TYPE; |
392 | ||
9e917af1 GP |
393 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
394 | control |= L2CAP_CTRL_FINAL; | |
395 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
396 | } | |
397 | ||
f0946ccf GP |
398 | if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { |
399 | control |= L2CAP_CTRL_POLL; | |
400 | pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; | |
401 | } | |
402 | ||
1c2acffb GP |
403 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
404 | if (!skb) | |
9a9c6a34 | 405 | return; |
1c2acffb GP |
406 | |
407 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
fcc203c3 | 408 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
1c2acffb GP |
409 | lh->cid = cpu_to_le16(pi->dcid); |
410 | put_unaligned_le16(control, skb_put(skb, 2)); | |
411 | ||
fcc203c3 GP |
412 | if (pi->fcs == L2CAP_FCS_CRC16) { |
413 | u16 fcs = crc16(0, (u8 *)lh, count - 2); | |
414 | put_unaligned_le16(fcs, skb_put(skb, 2)); | |
415 | } | |
416 | ||
9a9c6a34 | 417 | hci_send_acl(pi->conn->hcon, skb, 0); |
1c2acffb GP |
418 | } |
419 | ||
9a9c6a34 | 420 | static inline void l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control) |
7e743090 | 421 | { |
1890d36b | 422 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { |
7e743090 | 423 | control |= L2CAP_SUPER_RCV_NOT_READY; |
1890d36b GP |
424 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
425 | } else | |
7e743090 GP |
426 | control |= L2CAP_SUPER_RCV_READY; |
427 | ||
2ab25cdd GP |
428 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
429 | ||
9a9c6a34 | 430 | l2cap_send_sframe(pi, control); |
7e743090 GP |
431 | } |
432 | ||
e501d055 AE |
433 | static inline int __l2cap_no_conn_pending(struct sock *sk) |
434 | { | |
435 | return !(l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND); | |
436 | } | |
437 | ||
79d554a6 MH |
438 | static void l2cap_do_start(struct sock *sk) |
439 | { | |
440 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
441 | ||
442 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
984947dc MH |
443 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
444 | return; | |
445 | ||
e501d055 | 446 | if (l2cap_check_security(sk) && __l2cap_no_conn_pending(sk)) { |
b1235d79 MH |
447 | struct l2cap_conn_req req; |
448 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
449 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 450 | |
b1235d79 | 451 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
e501d055 | 452 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
79d554a6 | 453 | |
b1235d79 | 454 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 455 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 456 | } |
79d554a6 MH |
457 | } else { |
458 | struct l2cap_info_req req; | |
459 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
460 | ||
461 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
462 | conn->info_ident = l2cap_get_ident(conn); | |
463 | ||
464 | mod_timer(&conn->info_timer, jiffies + | |
465 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
466 | ||
467 | l2cap_send_cmd(conn, conn->info_ident, | |
468 | L2CAP_INFO_REQ, sizeof(req), &req); | |
469 | } | |
470 | } | |
471 | ||
cf6c2c0b GP |
472 | static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
473 | { | |
474 | u32 local_feat_mask = l2cap_feat_mask; | |
d1c4a17d | 475 | if (!disable_ertm) |
cf6c2c0b GP |
476 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
477 | ||
478 | switch (mode) { | |
479 | case L2CAP_MODE_ERTM: | |
480 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; | |
481 | case L2CAP_MODE_STREAMING: | |
482 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; | |
483 | default: | |
484 | return 0x00; | |
485 | } | |
486 | } | |
487 | ||
9b108fc0 | 488 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk, int err) |
22121fc9 GP |
489 | { |
490 | struct l2cap_disconn_req req; | |
491 | ||
c13ffa62 GP |
492 | if (!conn) |
493 | return; | |
494 | ||
495 | skb_queue_purge(TX_QUEUE(sk)); | |
496 | ||
497 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
498 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
499 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
500 | del_timer(&l2cap_pi(sk)->ack_timer); | |
501 | } | |
502 | ||
22121fc9 GP |
503 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
504 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
505 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
506 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
c13ffa62 GP |
507 | |
508 | sk->sk_state = BT_DISCONN; | |
9b108fc0 | 509 | sk->sk_err = err; |
22121fc9 GP |
510 | } |
511 | ||
1da177e4 | 512 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
513 | static void l2cap_conn_start(struct l2cap_conn *conn) |
514 | { | |
515 | struct l2cap_chan_list *l = &conn->chan_list; | |
cf6c2c0b | 516 | struct sock_del_list del, *tmp1, *tmp2; |
4e8402a3 MH |
517 | struct sock *sk; |
518 | ||
519 | BT_DBG("conn %p", conn); | |
520 | ||
cf6c2c0b GP |
521 | INIT_LIST_HEAD(&del.list); |
522 | ||
4e8402a3 MH |
523 | read_lock(&l->lock); |
524 | ||
525 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
526 | bh_lock_sock(sk); | |
527 | ||
bd3c9e25 GP |
528 | if (sk->sk_type != SOCK_SEQPACKET && |
529 | sk->sk_type != SOCK_STREAM) { | |
79d554a6 MH |
530 | bh_unlock_sock(sk); |
531 | continue; | |
532 | } | |
533 | ||
534 | if (sk->sk_state == BT_CONNECT) { | |
47731de7 | 535 | struct l2cap_conn_req req; |
79d554a6 | 536 | |
47731de7 GP |
537 | if (!l2cap_check_security(sk) || |
538 | !__l2cap_no_conn_pending(sk)) { | |
539 | bh_unlock_sock(sk); | |
540 | continue; | |
541 | } | |
79d554a6 | 542 | |
47731de7 GP |
543 | if (!l2cap_mode_supported(l2cap_pi(sk)->mode, |
544 | conn->feat_mask) | |
545 | && l2cap_pi(sk)->conf_state & | |
546 | L2CAP_CONF_STATE2_DEVICE) { | |
547 | tmp1 = kzalloc(sizeof(struct sock_del_list), | |
548 | GFP_ATOMIC); | |
549 | tmp1->sk = sk; | |
550 | list_add_tail(&tmp1->list, &del.list); | |
551 | bh_unlock_sock(sk); | |
552 | continue; | |
b1235d79 | 553 | } |
47731de7 GP |
554 | |
555 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
556 | req.psm = l2cap_pi(sk)->psm; | |
557 | ||
558 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); | |
559 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; | |
560 | ||
561 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
562 | L2CAP_CONN_REQ, sizeof(req), &req); | |
563 | ||
79d554a6 MH |
564 | } else if (sk->sk_state == BT_CONNECT2) { |
565 | struct l2cap_conn_rsp rsp; | |
e9aeb2dd | 566 | char buf[128]; |
79d554a6 MH |
567 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
568 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
569 | ||
2af6b9d5 | 570 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
571 | if (bt_sk(sk)->defer_setup) { |
572 | struct sock *parent = bt_sk(sk)->parent; | |
573 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
574 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
575 | parent->sk_data_ready(parent, 0); | |
576 | ||
577 | } else { | |
578 | sk->sk_state = BT_CONFIG; | |
579 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
580 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
581 | } | |
79d554a6 MH |
582 | } else { |
583 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
584 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
585 | } | |
586 | ||
587 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
588 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
e9aeb2dd GP |
589 | |
590 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT || | |
591 | rsp.result != L2CAP_CR_SUCCESS) { | |
592 | bh_unlock_sock(sk); | |
593 | continue; | |
594 | } | |
595 | ||
596 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
597 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
598 | l2cap_build_conf_req(sk, buf), buf); | |
599 | l2cap_pi(sk)->num_conf_req++; | |
4e8402a3 MH |
600 | } |
601 | ||
602 | bh_unlock_sock(sk); | |
603 | } | |
604 | ||
605 | read_unlock(&l->lock); | |
cf6c2c0b GP |
606 | |
607 | list_for_each_entry_safe(tmp1, tmp2, &del.list, list) { | |
608 | bh_lock_sock(tmp1->sk); | |
609 | __l2cap_sock_close(tmp1->sk, ECONNRESET); | |
610 | bh_unlock_sock(tmp1->sk); | |
611 | list_del(&tmp1->list); | |
612 | kfree(tmp1); | |
613 | } | |
4e8402a3 MH |
614 | } |
615 | ||
616 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
617 | { | |
79d554a6 MH |
618 | struct l2cap_chan_list *l = &conn->chan_list; |
619 | struct sock *sk; | |
4e8402a3 | 620 | |
79d554a6 | 621 | BT_DBG("conn %p", conn); |
4e8402a3 | 622 | |
79d554a6 | 623 | read_lock(&l->lock); |
4e8402a3 | 624 | |
79d554a6 MH |
625 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
626 | bh_lock_sock(sk); | |
4e8402a3 | 627 | |
bd3c9e25 GP |
628 | if (sk->sk_type != SOCK_SEQPACKET && |
629 | sk->sk_type != SOCK_STREAM) { | |
79d554a6 MH |
630 | l2cap_sock_clear_timer(sk); |
631 | sk->sk_state = BT_CONNECTED; | |
632 | sk->sk_state_change(sk); | |
633 | } else if (sk->sk_state == BT_CONNECT) | |
634 | l2cap_do_start(sk); | |
4e8402a3 | 635 | |
79d554a6 | 636 | bh_unlock_sock(sk); |
4e8402a3 | 637 | } |
79d554a6 MH |
638 | |
639 | read_unlock(&l->lock); | |
4e8402a3 MH |
640 | } |
641 | ||
642 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
643 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
644 | { | |
645 | struct l2cap_chan_list *l = &conn->chan_list; | |
646 | struct sock *sk; | |
647 | ||
648 | BT_DBG("conn %p", conn); | |
649 | ||
650 | read_lock(&l->lock); | |
651 | ||
652 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 653 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
654 | sk->sk_err = err; |
655 | } | |
656 | ||
657 | read_unlock(&l->lock); | |
658 | } | |
659 | ||
660 | static void l2cap_info_timeout(unsigned long arg) | |
661 | { | |
662 | struct l2cap_conn *conn = (void *) arg; | |
663 | ||
984947dc | 664 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 665 | conn->info_ident = 0; |
984947dc | 666 | |
4e8402a3 MH |
667 | l2cap_conn_start(conn); |
668 | } | |
669 | ||
1da177e4 LT |
670 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
671 | { | |
0139418c | 672 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 673 | |
0139418c | 674 | if (conn || status) |
1da177e4 LT |
675 | return conn; |
676 | ||
0139418c MH |
677 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
678 | if (!conn) | |
1da177e4 | 679 | return NULL; |
1da177e4 LT |
680 | |
681 | hcon->l2cap_data = conn; | |
682 | conn->hcon = hcon; | |
683 | ||
0139418c MH |
684 | BT_DBG("hcon %p conn %p", hcon, conn); |
685 | ||
1da177e4 LT |
686 | conn->mtu = hcon->hdev->acl_mtu; |
687 | conn->src = &hcon->hdev->bdaddr; | |
688 | conn->dst = &hcon->dst; | |
689 | ||
4e8402a3 MH |
690 | conn->feat_mask = 0; |
691 | ||
1da177e4 LT |
692 | spin_lock_init(&conn->lock); |
693 | rwlock_init(&conn->chan_list.lock); | |
694 | ||
45054dc1 DY |
695 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
696 | (unsigned long) conn); | |
697 | ||
2950f21a MH |
698 | conn->disc_reason = 0x13; |
699 | ||
1da177e4 LT |
700 | return conn; |
701 | } | |
702 | ||
0139418c | 703 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 704 | { |
0139418c | 705 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
706 | struct sock *sk; |
707 | ||
0139418c MH |
708 | if (!conn) |
709 | return; | |
1da177e4 LT |
710 | |
711 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
712 | ||
7585b97a | 713 | kfree_skb(conn->rx_skb); |
1da177e4 LT |
714 | |
715 | /* Kill channels */ | |
716 | while ((sk = conn->chan_list.head)) { | |
717 | bh_lock_sock(sk); | |
718 | l2cap_chan_del(sk, err); | |
719 | bh_unlock_sock(sk); | |
720 | l2cap_sock_kill(sk); | |
721 | } | |
722 | ||
8e8440f5 DY |
723 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
724 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 725 | |
1da177e4 LT |
726 | hcon->l2cap_data = NULL; |
727 | kfree(conn); | |
1da177e4 LT |
728 | } |
729 | ||
730 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
731 | { | |
732 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 733 | write_lock_bh(&l->lock); |
1da177e4 | 734 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 735 | write_unlock_bh(&l->lock); |
1da177e4 LT |
736 | } |
737 | ||
1da177e4 | 738 | /* ---- Socket interface ---- */ |
8e036fc3 | 739 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
740 | { |
741 | struct sock *sk; | |
742 | struct hlist_node *node; | |
743 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
744 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
745 | goto found; | |
746 | sk = NULL; | |
747 | found: | |
748 | return sk; | |
749 | } | |
750 | ||
751 | /* Find socket with psm and source bdaddr. | |
752 | * Returns closest match. | |
753 | */ | |
e0f0cb56 | 754 | static struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
755 | { |
756 | struct sock *sk = NULL, *sk1 = NULL; | |
757 | struct hlist_node *node; | |
758 | ||
e0f0cb56 GP |
759 | read_lock(&l2cap_sk_list.lock); |
760 | ||
1da177e4 LT |
761 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
762 | if (state && sk->sk_state != state) | |
763 | continue; | |
764 | ||
765 | if (l2cap_pi(sk)->psm == psm) { | |
766 | /* Exact match. */ | |
767 | if (!bacmp(&bt_sk(sk)->src, src)) | |
768 | break; | |
769 | ||
770 | /* Closest match */ | |
771 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
772 | sk1 = sk; | |
773 | } | |
774 | } | |
1da177e4 | 775 | |
1da177e4 | 776 | read_unlock(&l2cap_sk_list.lock); |
e0f0cb56 GP |
777 | |
778 | return node ? sk : sk1; | |
1da177e4 LT |
779 | } |
780 | ||
781 | static void l2cap_sock_destruct(struct sock *sk) | |
782 | { | |
783 | BT_DBG("sk %p", sk); | |
784 | ||
785 | skb_queue_purge(&sk->sk_receive_queue); | |
786 | skb_queue_purge(&sk->sk_write_queue); | |
787 | } | |
788 | ||
789 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
790 | { | |
791 | struct sock *sk; | |
792 | ||
793 | BT_DBG("parent %p", parent); | |
794 | ||
795 | /* Close not yet accepted channels */ | |
796 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
797 | l2cap_sock_close(sk); | |
798 | ||
b1235d79 | 799 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
800 | sock_set_flag(parent, SOCK_ZAPPED); |
801 | } | |
802 | ||
803 | /* Kill socket (only if zapped and orphan) | |
804 | * Must be called on unlocked socket. | |
805 | */ | |
806 | static void l2cap_sock_kill(struct sock *sk) | |
807 | { | |
808 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
809 | return; | |
810 | ||
811 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
812 | ||
813 | /* Kill poor orphan */ | |
814 | bt_sock_unlink(&l2cap_sk_list, sk); | |
815 | sock_set_flag(sk, SOCK_DEAD); | |
816 | sock_put(sk); | |
817 | } | |
818 | ||
819 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
820 | { | |
821 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
822 | ||
823 | switch (sk->sk_state) { | |
824 | case BT_LISTEN: | |
825 | l2cap_sock_cleanup_listen(sk); | |
826 | break; | |
827 | ||
828 | case BT_CONNECTED: | |
829 | case BT_CONFIG: | |
bd3c9e25 GP |
830 | if (sk->sk_type == SOCK_SEQPACKET || |
831 | sk->sk_type == SOCK_STREAM) { | |
1da177e4 | 832 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
1da177e4 | 833 | |
1da177e4 | 834 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
9b108fc0 | 835 | l2cap_send_disconn_req(conn, sk, reason); |
b1235d79 | 836 | } else |
1da177e4 | 837 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
838 | break; |
839 | ||
f66dc81f | 840 | case BT_CONNECT2: |
bd3c9e25 GP |
841 | if (sk->sk_type == SOCK_SEQPACKET || |
842 | sk->sk_type == SOCK_STREAM) { | |
f66dc81f MH |
843 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
844 | struct l2cap_conn_rsp rsp; | |
845 | __u16 result; | |
846 | ||
847 | if (bt_sk(sk)->defer_setup) | |
848 | result = L2CAP_CR_SEC_BLOCK; | |
849 | else | |
850 | result = L2CAP_CR_BAD_PSM; | |
851 | ||
852 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
853 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
854 | rsp.result = cpu_to_le16(result); | |
855 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
856 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
857 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
858 | } else | |
859 | l2cap_chan_del(sk, reason); | |
860 | break; | |
861 | ||
1da177e4 LT |
862 | case BT_CONNECT: |
863 | case BT_DISCONN: | |
864 | l2cap_chan_del(sk, reason); | |
865 | break; | |
866 | ||
867 | default: | |
868 | sock_set_flag(sk, SOCK_ZAPPED); | |
869 | break; | |
870 | } | |
871 | } | |
872 | ||
873 | /* Must be called on unlocked socket. */ | |
874 | static void l2cap_sock_close(struct sock *sk) | |
875 | { | |
876 | l2cap_sock_clear_timer(sk); | |
877 | lock_sock(sk); | |
878 | __l2cap_sock_close(sk, ECONNRESET); | |
879 | release_sock(sk); | |
880 | l2cap_sock_kill(sk); | |
881 | } | |
882 | ||
883 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
884 | { | |
885 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
886 | ||
887 | BT_DBG("sk %p", sk); | |
888 | ||
889 | if (parent) { | |
890 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
891 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
892 | ||
1da177e4 LT |
893 | pi->imtu = l2cap_pi(parent)->imtu; |
894 | pi->omtu = l2cap_pi(parent)->omtu; | |
85eb53c6 | 895 | pi->conf_state = l2cap_pi(parent)->conf_state; |
c6b03cf9 MH |
896 | pi->mode = l2cap_pi(parent)->mode; |
897 | pi->fcs = l2cap_pi(parent)->fcs; | |
68d7f0ce | 898 | pi->max_tx = l2cap_pi(parent)->max_tx; |
14b5aa71 | 899 | pi->tx_win = l2cap_pi(parent)->tx_win; |
2af6b9d5 MH |
900 | pi->sec_level = l2cap_pi(parent)->sec_level; |
901 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
902 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
903 | } else { |
904 | pi->imtu = L2CAP_DEFAULT_MTU; | |
905 | pi->omtu = 0; | |
d1c4a17d | 906 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
bd3c9e25 | 907 | pi->mode = L2CAP_MODE_ERTM; |
85eb53c6 GP |
908 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
909 | } else { | |
bd3c9e25 | 910 | pi->mode = L2CAP_MODE_BASIC; |
85eb53c6 | 911 | } |
fd059b9b | 912 | pi->max_tx = L2CAP_DEFAULT_MAX_TX; |
c6b03cf9 | 913 | pi->fcs = L2CAP_FCS_CRC16; |
fd059b9b | 914 | pi->tx_win = L2CAP_DEFAULT_TX_WINDOW; |
2af6b9d5 MH |
915 | pi->sec_level = BT_SECURITY_LOW; |
916 | pi->role_switch = 0; | |
917 | pi->force_reliable = 0; | |
1da177e4 LT |
918 | } |
919 | ||
920 | /* Default config options */ | |
5dee9e7c | 921 | pi->conf_len = 0; |
1da177e4 | 922 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
45054dc1 DY |
923 | skb_queue_head_init(TX_QUEUE(sk)); |
924 | skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b | 925 | skb_queue_head_init(BUSY_QUEUE(sk)); |
45054dc1 | 926 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
1da177e4 LT |
927 | } |
928 | ||
929 | static struct proto l2cap_proto = { | |
930 | .name = "L2CAP", | |
931 | .owner = THIS_MODULE, | |
932 | .obj_size = sizeof(struct l2cap_pinfo) | |
933 | }; | |
934 | ||
1b8d7ae4 | 935 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
936 | { |
937 | struct sock *sk; | |
938 | ||
6257ff21 | 939 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
940 | if (!sk) |
941 | return NULL; | |
942 | ||
943 | sock_init_data(sock, sk); | |
944 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
945 | ||
946 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 947 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
948 | |
949 | sock_reset_flag(sk, SOCK_ZAPPED); | |
950 | ||
951 | sk->sk_protocol = proto; | |
b1235d79 | 952 | sk->sk_state = BT_OPEN; |
1da177e4 | 953 | |
b1235d79 | 954 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
955 | |
956 | bt_sock_link(&l2cap_sk_list, sk); | |
957 | return sk; | |
958 | } | |
959 | ||
3f378b68 EP |
960 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, |
961 | int kern) | |
1da177e4 LT |
962 | { |
963 | struct sock *sk; | |
964 | ||
965 | BT_DBG("sock %p", sock); | |
966 | ||
967 | sock->state = SS_UNCONNECTED; | |
968 | ||
bd3c9e25 | 969 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && |
1da177e4 LT |
970 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
971 | return -ESOCKTNOSUPPORT; | |
972 | ||
c84b3268 | 973 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
1da177e4 LT |
974 | return -EPERM; |
975 | ||
976 | sock->ops = &l2cap_sock_ops; | |
977 | ||
1b8d7ae4 | 978 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
979 | if (!sk) |
980 | return -ENOMEM; | |
981 | ||
982 | l2cap_sock_init(sk, NULL); | |
983 | return 0; | |
984 | } | |
985 | ||
f29972de | 986 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
1da177e4 | 987 | { |
1da177e4 | 988 | struct sock *sk = sock->sk; |
f29972de MH |
989 | struct sockaddr_l2 la; |
990 | int len, err = 0; | |
1da177e4 | 991 | |
f29972de | 992 | BT_DBG("sk %p", sk); |
1da177e4 LT |
993 | |
994 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
995 | return -EINVAL; | |
996 | ||
f29972de MH |
997 | memset(&la, 0, sizeof(la)); |
998 | len = min_t(unsigned int, sizeof(la), alen); | |
999 | memcpy(&la, addr, len); | |
1000 | ||
2a517ca6 MH |
1001 | if (la.l2_cid) |
1002 | return -EINVAL; | |
1003 | ||
1da177e4 LT |
1004 | lock_sock(sk); |
1005 | ||
1006 | if (sk->sk_state != BT_OPEN) { | |
1007 | err = -EBADFD; | |
1008 | goto done; | |
1009 | } | |
1010 | ||
0fba2558 MM |
1011 | if (la.l2_psm) { |
1012 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
1013 | ||
1014 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
1015 | if ((psm & 0x0101) != 0x0001) { | |
1016 | err = -EINVAL; | |
1017 | goto done; | |
1018 | } | |
1019 | ||
1020 | /* Restrict usage of well-known PSMs */ | |
1021 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
1022 | err = -EACCES; | |
1023 | goto done; | |
1024 | } | |
847641d7 | 1025 | } |
8e87d142 | 1026 | |
1da177e4 LT |
1027 | write_lock_bh(&l2cap_sk_list.lock); |
1028 | ||
f29972de | 1029 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
1da177e4 LT |
1030 | err = -EADDRINUSE; |
1031 | } else { | |
1032 | /* Save source address */ | |
f29972de MH |
1033 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
1034 | l2cap_pi(sk)->psm = la.l2_psm; | |
1035 | l2cap_pi(sk)->sport = la.l2_psm; | |
1da177e4 | 1036 | sk->sk_state = BT_BOUND; |
2af6b9d5 | 1037 | |
b4324b5d MH |
1038 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
1039 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
2af6b9d5 | 1040 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
1da177e4 LT |
1041 | } |
1042 | ||
1043 | write_unlock_bh(&l2cap_sk_list.lock); | |
1044 | ||
1045 | done: | |
1046 | release_sock(sk); | |
1047 | return err; | |
1048 | } | |
1049 | ||
1050 | static int l2cap_do_connect(struct sock *sk) | |
1051 | { | |
1052 | bdaddr_t *src = &bt_sk(sk)->src; | |
1053 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
1054 | struct l2cap_conn *conn; | |
1055 | struct hci_conn *hcon; | |
1056 | struct hci_dev *hdev; | |
09ab6f4c | 1057 | __u8 auth_type; |
44d0e48e | 1058 | int err; |
1da177e4 | 1059 | |
f29972de MH |
1060 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
1061 | l2cap_pi(sk)->psm); | |
1da177e4 | 1062 | |
af05b30b GP |
1063 | hdev = hci_get_route(dst, src); |
1064 | if (!hdev) | |
1da177e4 LT |
1065 | return -EHOSTUNREACH; |
1066 | ||
1067 | hci_dev_lock_bh(hdev); | |
1068 | ||
1069 | err = -ENOMEM; | |
1070 | ||
8c1b2355 | 1071 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
1072 | switch (l2cap_pi(sk)->sec_level) { |
1073 | case BT_SECURITY_HIGH: | |
8c1b2355 | 1074 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
1075 | break; |
1076 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 1077 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
1078 | break; |
1079 | default: | |
09ab6f4c | 1080 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
1081 | break; |
1082 | } | |
8c1b2355 | 1083 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 1084 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 1085 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 1086 | else |
8c1b2355 | 1087 | auth_type = HCI_AT_NO_BONDING; |
435fef20 MH |
1088 | |
1089 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
1090 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
8c1b2355 | 1091 | } else { |
2af6b9d5 MH |
1092 | switch (l2cap_pi(sk)->sec_level) { |
1093 | case BT_SECURITY_HIGH: | |
8c1b2355 | 1094 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
1095 | break; |
1096 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 1097 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
1098 | break; |
1099 | default: | |
8c1b2355 | 1100 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
1101 | break; |
1102 | } | |
09ab6f4c MH |
1103 | } |
1104 | ||
2af6b9d5 MH |
1105 | hcon = hci_connect(hdev, ACL_LINK, dst, |
1106 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
1107 | if (!hcon) |
1108 | goto done; | |
1109 | ||
1110 | conn = l2cap_conn_add(hcon, 0); | |
1111 | if (!conn) { | |
1112 | hci_conn_put(hcon); | |
1113 | goto done; | |
1114 | } | |
1115 | ||
1116 | err = 0; | |
1117 | ||
1118 | /* Update source addr of the socket */ | |
1119 | bacpy(src, conn->src); | |
1120 | ||
1121 | l2cap_chan_add(conn, sk, NULL); | |
1122 | ||
1123 | sk->sk_state = BT_CONNECT; | |
1124 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
1125 | ||
1126 | if (hcon->state == BT_CONNECTED) { | |
bd3c9e25 GP |
1127 | if (sk->sk_type != SOCK_SEQPACKET && |
1128 | sk->sk_type != SOCK_STREAM) { | |
1da177e4 LT |
1129 | l2cap_sock_clear_timer(sk); |
1130 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
1131 | } else |
1132 | l2cap_do_start(sk); | |
1da177e4 LT |
1133 | } |
1134 | ||
1135 | done: | |
1136 | hci_dev_unlock_bh(hdev); | |
1137 | hci_dev_put(hdev); | |
1138 | return err; | |
1139 | } | |
1140 | ||
1141 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
1142 | { | |
1da177e4 | 1143 | struct sock *sk = sock->sk; |
f29972de MH |
1144 | struct sockaddr_l2 la; |
1145 | int len, err = 0; | |
1da177e4 | 1146 | |
1da177e4 LT |
1147 | BT_DBG("sk %p", sk); |
1148 | ||
6503d961 CG |
1149 | if (!addr || alen < sizeof(addr->sa_family) || |
1150 | addr->sa_family != AF_BLUETOOTH) | |
2a517ca6 | 1151 | return -EINVAL; |
1da177e4 | 1152 | |
f29972de MH |
1153 | memset(&la, 0, sizeof(la)); |
1154 | len = min_t(unsigned int, sizeof(la), alen); | |
1155 | memcpy(&la, addr, len); | |
1156 | ||
2a517ca6 MH |
1157 | if (la.l2_cid) |
1158 | return -EINVAL; | |
1159 | ||
1160 | lock_sock(sk); | |
1161 | ||
bd3c9e25 GP |
1162 | if ((sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) |
1163 | && !la.l2_psm) { | |
1da177e4 LT |
1164 | err = -EINVAL; |
1165 | goto done; | |
1166 | } | |
1167 | ||
c6b03cf9 MH |
1168 | switch (l2cap_pi(sk)->mode) { |
1169 | case L2CAP_MODE_BASIC: | |
1170 | break; | |
1171 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1172 | case L2CAP_MODE_STREAMING: |
d1c4a17d | 1173 | if (!disable_ertm) |
c6b03cf9 MH |
1174 | break; |
1175 | /* fall through */ | |
1176 | default: | |
1177 | err = -ENOTSUPP; | |
1178 | goto done; | |
1179 | } | |
1180 | ||
af05b30b | 1181 | switch (sk->sk_state) { |
1da177e4 LT |
1182 | case BT_CONNECT: |
1183 | case BT_CONNECT2: | |
1184 | case BT_CONFIG: | |
1185 | /* Already connecting */ | |
1186 | goto wait; | |
1187 | ||
1188 | case BT_CONNECTED: | |
1189 | /* Already connected */ | |
8b0dc6dc | 1190 | err = -EISCONN; |
1da177e4 LT |
1191 | goto done; |
1192 | ||
1193 | case BT_OPEN: | |
1194 | case BT_BOUND: | |
1195 | /* Can connect */ | |
1196 | break; | |
1197 | ||
1198 | default: | |
1199 | err = -EBADFD; | |
1200 | goto done; | |
1201 | } | |
1202 | ||
0fba2558 MM |
1203 | /* PSM must be odd and lsb of upper byte must be 0 */ |
1204 | if ((__le16_to_cpu(la.l2_psm) & 0x0101) != 0x0001 && | |
1205 | sk->sk_type != SOCK_RAW) { | |
1206 | err = -EINVAL; | |
1207 | goto done; | |
1208 | } | |
1209 | ||
1da177e4 | 1210 | /* Set destination address and psm */ |
f29972de MH |
1211 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
1212 | l2cap_pi(sk)->psm = la.l2_psm; | |
1da177e4 | 1213 | |
af05b30b GP |
1214 | err = l2cap_do_connect(sk); |
1215 | if (err) | |
1da177e4 LT |
1216 | goto done; |
1217 | ||
1218 | wait: | |
1219 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
1220 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
1221 | done: | |
1222 | release_sock(sk); | |
1223 | return err; | |
1224 | } | |
1225 | ||
1226 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
1227 | { | |
1228 | struct sock *sk = sock->sk; | |
1229 | int err = 0; | |
1230 | ||
1231 | BT_DBG("sk %p backlog %d", sk, backlog); | |
1232 | ||
1233 | lock_sock(sk); | |
1234 | ||
bd3c9e25 GP |
1235 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) |
1236 | || sk->sk_state != BT_BOUND) { | |
1da177e4 LT |
1237 | err = -EBADFD; |
1238 | goto done; | |
1239 | } | |
1240 | ||
c6b03cf9 MH |
1241 | switch (l2cap_pi(sk)->mode) { |
1242 | case L2CAP_MODE_BASIC: | |
1243 | break; | |
1244 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1245 | case L2CAP_MODE_STREAMING: |
d1c4a17d | 1246 | if (!disable_ertm) |
c6b03cf9 MH |
1247 | break; |
1248 | /* fall through */ | |
1249 | default: | |
1250 | err = -ENOTSUPP; | |
1251 | goto done; | |
1252 | } | |
1253 | ||
1da177e4 LT |
1254 | if (!l2cap_pi(sk)->psm) { |
1255 | bdaddr_t *src = &bt_sk(sk)->src; | |
1256 | u16 psm; | |
1257 | ||
1258 | err = -EINVAL; | |
1259 | ||
1260 | write_lock_bh(&l2cap_sk_list.lock); | |
1261 | ||
1262 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
b4324b5d MH |
1263 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
1264 | l2cap_pi(sk)->psm = cpu_to_le16(psm); | |
1265 | l2cap_pi(sk)->sport = cpu_to_le16(psm); | |
1da177e4 LT |
1266 | err = 0; |
1267 | break; | |
1268 | } | |
1269 | ||
1270 | write_unlock_bh(&l2cap_sk_list.lock); | |
1271 | ||
1272 | if (err < 0) | |
1273 | goto done; | |
1274 | } | |
1275 | ||
1276 | sk->sk_max_ack_backlog = backlog; | |
1277 | sk->sk_ack_backlog = 0; | |
1278 | sk->sk_state = BT_LISTEN; | |
1279 | ||
1280 | done: | |
1281 | release_sock(sk); | |
1282 | return err; | |
1283 | } | |
1284 | ||
1285 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
1286 | { | |
1287 | DECLARE_WAITQUEUE(wait, current); | |
1288 | struct sock *sk = sock->sk, *nsk; | |
1289 | long timeo; | |
1290 | int err = 0; | |
1291 | ||
fcc70d5f | 1292 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1293 | |
1294 | if (sk->sk_state != BT_LISTEN) { | |
1295 | err = -EBADFD; | |
1296 | goto done; | |
1297 | } | |
1298 | ||
1299 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1300 | ||
1301 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1302 | ||
1303 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 1304 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
1da177e4 LT |
1305 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { |
1306 | set_current_state(TASK_INTERRUPTIBLE); | |
1307 | if (!timeo) { | |
1308 | err = -EAGAIN; | |
1309 | break; | |
1310 | } | |
1311 | ||
1312 | release_sock(sk); | |
1313 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1314 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1315 | |
1316 | if (sk->sk_state != BT_LISTEN) { | |
1317 | err = -EBADFD; | |
1318 | break; | |
1319 | } | |
1320 | ||
1321 | if (signal_pending(current)) { | |
1322 | err = sock_intr_errno(timeo); | |
1323 | break; | |
1324 | } | |
1325 | } | |
1326 | set_current_state(TASK_RUNNING); | |
aa395145 | 1327 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
1328 | |
1329 | if (err) | |
1330 | goto done; | |
1331 | ||
1332 | newsock->state = SS_CONNECTED; | |
1333 | ||
1334 | BT_DBG("new socket %p", nsk); | |
1335 | ||
1336 | done: | |
1337 | release_sock(sk); | |
1338 | return err; | |
1339 | } | |
1340 | ||
1341 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1342 | { | |
1343 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1344 | struct sock *sk = sock->sk; | |
1345 | ||
1346 | BT_DBG("sock %p, sk %p", sock, sk); | |
1347 | ||
1348 | addr->sa_family = AF_BLUETOOTH; | |
1349 | *len = sizeof(struct sockaddr_l2); | |
1350 | ||
f29972de MH |
1351 | if (peer) { |
1352 | la->l2_psm = l2cap_pi(sk)->psm; | |
1da177e4 | 1353 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
b4324b5d | 1354 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
f29972de MH |
1355 | } else { |
1356 | la->l2_psm = l2cap_pi(sk)->sport; | |
1da177e4 | 1357 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
b4324b5d | 1358 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
f29972de | 1359 | } |
1da177e4 | 1360 | |
1da177e4 LT |
1361 | return 0; |
1362 | } | |
1363 | ||
6161c038 GP |
1364 | static int __l2cap_wait_ack(struct sock *sk) |
1365 | { | |
1366 | DECLARE_WAITQUEUE(wait, current); | |
1367 | int err = 0; | |
1368 | int timeo = HZ/5; | |
1369 | ||
2b0b05dd | 1370 | add_wait_queue(sk_sleep(sk), &wait); |
6161c038 GP |
1371 | while ((l2cap_pi(sk)->unacked_frames > 0 && l2cap_pi(sk)->conn)) { |
1372 | set_current_state(TASK_INTERRUPTIBLE); | |
1373 | ||
1374 | if (!timeo) | |
1375 | timeo = HZ/5; | |
1376 | ||
1377 | if (signal_pending(current)) { | |
1378 | err = sock_intr_errno(timeo); | |
1379 | break; | |
1380 | } | |
1381 | ||
1382 | release_sock(sk); | |
1383 | timeo = schedule_timeout(timeo); | |
1384 | lock_sock(sk); | |
1385 | ||
1386 | err = sock_error(sk); | |
1387 | if (err) | |
1388 | break; | |
1389 | } | |
1390 | set_current_state(TASK_RUNNING); | |
2b0b05dd | 1391 | remove_wait_queue(sk_sleep(sk), &wait); |
6161c038 GP |
1392 | return err; |
1393 | } | |
1394 | ||
e90bac06 GP |
1395 | static void l2cap_monitor_timeout(unsigned long arg) |
1396 | { | |
1397 | struct sock *sk = (void *) arg; | |
e90bac06 | 1398 | |
0e98958d GP |
1399 | BT_DBG("sk %p", sk); |
1400 | ||
e686219a | 1401 | bh_lock_sock(sk); |
e90bac06 | 1402 | if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { |
9b108fc0 | 1403 | l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk, ECONNABORTED); |
b13f5860 | 1404 | bh_unlock_sock(sk); |
e90bac06 GP |
1405 | return; |
1406 | } | |
1407 | ||
1408 | l2cap_pi(sk)->retry_count++; | |
1409 | __mod_monitor_timer(); | |
1410 | ||
a2e12a2a | 1411 | l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL); |
e686219a | 1412 | bh_unlock_sock(sk); |
e90bac06 GP |
1413 | } |
1414 | ||
1415 | static void l2cap_retrans_timeout(unsigned long arg) | |
1416 | { | |
1417 | struct sock *sk = (void *) arg; | |
e90bac06 | 1418 | |
0e98958d GP |
1419 | BT_DBG("sk %p", sk); |
1420 | ||
e686219a | 1421 | bh_lock_sock(sk); |
e90bac06 GP |
1422 | l2cap_pi(sk)->retry_count = 1; |
1423 | __mod_monitor_timer(); | |
1424 | ||
1425 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
1426 | ||
a2e12a2a | 1427 | l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL); |
e686219a | 1428 | bh_unlock_sock(sk); |
e90bac06 GP |
1429 | } |
1430 | ||
1c2acffb | 1431 | static void l2cap_drop_acked_frames(struct sock *sk) |
1da177e4 | 1432 | { |
1c2acffb | 1433 | struct sk_buff *skb; |
1da177e4 | 1434 | |
812e737e GP |
1435 | while ((skb = skb_peek(TX_QUEUE(sk))) && |
1436 | l2cap_pi(sk)->unacked_frames) { | |
1c2acffb GP |
1437 | if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq) |
1438 | break; | |
1da177e4 | 1439 | |
1c2acffb GP |
1440 | skb = skb_dequeue(TX_QUEUE(sk)); |
1441 | kfree_skb(skb); | |
1da177e4 | 1442 | |
1c2acffb GP |
1443 | l2cap_pi(sk)->unacked_frames--; |
1444 | } | |
1da177e4 | 1445 | |
e90bac06 GP |
1446 | if (!l2cap_pi(sk)->unacked_frames) |
1447 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
1c2acffb | 1448 | } |
1da177e4 | 1449 | |
9a9c6a34 | 1450 | static inline void l2cap_do_send(struct sock *sk, struct sk_buff *skb) |
1c2acffb GP |
1451 | { |
1452 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1c2acffb GP |
1453 | |
1454 | BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len); | |
1da177e4 | 1455 | |
9a9c6a34 | 1456 | hci_send_acl(pi->conn->hcon, skb, 0); |
1c2acffb GP |
1457 | } |
1458 | ||
305682e8 | 1459 | static void l2cap_streaming_send(struct sock *sk) |
6840ed07 | 1460 | { |
ccbb84af | 1461 | struct sk_buff *skb; |
6840ed07 | 1462 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
fcc203c3 | 1463 | u16 control, fcs; |
6840ed07 | 1464 | |
ccbb84af GP |
1465 | while ((skb = skb_dequeue(TX_QUEUE(sk)))) { |
1466 | control = get_unaligned_le16(skb->data + L2CAP_HDR_SIZE); | |
6840ed07 | 1467 | control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; |
ccbb84af | 1468 | put_unaligned_le16(control, skb->data + L2CAP_HDR_SIZE); |
6840ed07 | 1469 | |
e8235c6b | 1470 | if (pi->fcs == L2CAP_FCS_CRC16) { |
ccbb84af GP |
1471 | fcs = crc16(0, (u8 *)skb->data, skb->len - 2); |
1472 | put_unaligned_le16(fcs, skb->data + skb->len - 2); | |
fcc203c3 GP |
1473 | } |
1474 | ||
ccbb84af | 1475 | l2cap_do_send(sk, skb); |
6840ed07 GP |
1476 | |
1477 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
6840ed07 | 1478 | } |
6840ed07 GP |
1479 | } |
1480 | ||
dfc909be | 1481 | static void l2cap_retransmit_one_frame(struct sock *sk, u8 tx_seq) |
8f17154f GP |
1482 | { |
1483 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1484 | struct sk_buff *skb, *tx_skb; | |
1485 | u16 control, fcs; | |
8f17154f GP |
1486 | |
1487 | skb = skb_peek(TX_QUEUE(sk)); | |
f11d676d GP |
1488 | if (!skb) |
1489 | return; | |
8f17154f | 1490 | |
f11d676d GP |
1491 | do { |
1492 | if (bt_cb(skb)->tx_seq == tx_seq) | |
8f17154f | 1493 | break; |
8f17154f | 1494 | |
f11d676d GP |
1495 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
1496 | return; | |
8f17154f | 1497 | |
f11d676d | 1498 | } while ((skb = skb_queue_next(TX_QUEUE(sk), skb))); |
8f17154f | 1499 | |
f11d676d GP |
1500 | if (pi->remote_max_tx && |
1501 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
9b108fc0 | 1502 | l2cap_send_disconn_req(pi->conn, sk, ECONNABORTED); |
f11d676d GP |
1503 | return; |
1504 | } | |
1505 | ||
1506 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1507 | bt_cb(skb)->retries++; | |
1508 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
3cb123d1 GP |
1509 | |
1510 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { | |
1511 | control |= L2CAP_CTRL_FINAL; | |
1512 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
1513 | } | |
95ffa978 | 1514 | |
f11d676d GP |
1515 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
1516 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); | |
3cb123d1 | 1517 | |
f11d676d GP |
1518 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
1519 | ||
1520 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
1521 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1522 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1523 | } | |
1524 | ||
1525 | l2cap_do_send(sk, tx_skb); | |
8f17154f GP |
1526 | } |
1527 | ||
1c2acffb GP |
1528 | static int l2cap_ertm_send(struct sock *sk) |
1529 | { | |
1530 | struct sk_buff *skb, *tx_skb; | |
1531 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1532 | u16 control, fcs; |
9a9c6a34 | 1533 | int nsent = 0; |
1c2acffb | 1534 | |
c13ffa62 GP |
1535 | if (sk->sk_state != BT_CONNECTED) |
1536 | return -ENOTCONN; | |
e90bac06 | 1537 | |
6e2b6722 | 1538 | while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk))) { |
1c2acffb | 1539 | |
e90bac06 GP |
1540 | if (pi->remote_max_tx && |
1541 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
9b108fc0 | 1542 | l2cap_send_disconn_req(pi->conn, sk, ECONNABORTED); |
e90bac06 GP |
1543 | break; |
1544 | } | |
1545 | ||
e420aba3 AE |
1546 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
1547 | ||
e90bac06 GP |
1548 | bt_cb(skb)->retries++; |
1549 | ||
1c2acffb | 1550 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
95ffa978 GP |
1551 | control &= L2CAP_CTRL_SAR; |
1552 | ||
d5392c8f GP |
1553 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
1554 | control |= L2CAP_CTRL_FINAL; | |
1555 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; | |
1556 | } | |
9f121a5a | 1557 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
1c2acffb GP |
1558 | | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
1559 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1560 | ||
e90bac06 | 1561 | |
e8235c6b | 1562 | if (pi->fcs == L2CAP_FCS_CRC16) { |
fcc203c3 GP |
1563 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); |
1564 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); | |
1565 | } | |
1566 | ||
9a9c6a34 GP |
1567 | l2cap_do_send(sk, tx_skb); |
1568 | ||
e90bac06 | 1569 | __mod_retrans_timer(); |
1c2acffb GP |
1570 | |
1571 | bt_cb(skb)->tx_seq = pi->next_tx_seq; | |
1572 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1573 | ||
1574 | pi->unacked_frames++; | |
d5392c8f | 1575 | pi->frames_sent++; |
1c2acffb GP |
1576 | |
1577 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1578 | sk->sk_send_head = NULL; | |
1579 | else | |
1580 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
9e917af1 GP |
1581 | |
1582 | nsent++; | |
1c2acffb GP |
1583 | } |
1584 | ||
9e917af1 GP |
1585 | return nsent; |
1586 | } | |
1587 | ||
dfc909be GP |
1588 | static int l2cap_retransmit_frames(struct sock *sk) |
1589 | { | |
1590 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1591 | int ret; | |
1592 | ||
dfc909be GP |
1593 | if (!skb_queue_empty(TX_QUEUE(sk))) |
1594 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
1595 | ||
1596 | pi->next_tx_seq = pi->expected_ack_seq; | |
1597 | ret = l2cap_ertm_send(sk); | |
dfc909be GP |
1598 | return ret; |
1599 | } | |
1600 | ||
9a9c6a34 | 1601 | static void l2cap_send_ack(struct l2cap_pinfo *pi) |
9e917af1 GP |
1602 | { |
1603 | struct sock *sk = (struct sock *)pi; | |
1604 | u16 control = 0; | |
1605 | ||
1606 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
1607 | ||
1608 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
1609 | control |= L2CAP_SUPER_RCV_NOT_READY; | |
1890d36b | 1610 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
9a9c6a34 GP |
1611 | l2cap_send_sframe(pi, control); |
1612 | return; | |
9e917af1 | 1613 | } |
dfc909be | 1614 | |
e0f66218 | 1615 | if (l2cap_ertm_send(sk) > 0) |
dfc909be GP |
1616 | return; |
1617 | ||
1618 | control |= L2CAP_SUPER_RCV_READY; | |
1619 | l2cap_send_sframe(pi, control); | |
1c2acffb GP |
1620 | } |
1621 | ||
9a9c6a34 | 1622 | static void l2cap_send_srejtail(struct sock *sk) |
99b0d4b7 GP |
1623 | { |
1624 | struct srej_list *tail; | |
1625 | u16 control; | |
1626 | ||
1627 | control = L2CAP_SUPER_SELECT_REJECT; | |
1628 | control |= L2CAP_CTRL_FINAL; | |
1629 | ||
1630 | tail = list_entry(SREJ_LIST(sk)->prev, struct srej_list, list); | |
1631 | control |= tail->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
1632 | ||
1633 | l2cap_send_sframe(l2cap_pi(sk), control); | |
99b0d4b7 GP |
1634 | } |
1635 | ||
1c2acffb GP |
1636 | static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb) |
1637 | { | |
1638 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1639 | struct sk_buff **frag; | |
1640 | int err, sent = 0; | |
1da177e4 | 1641 | |
59203a21 | 1642 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
1c2acffb | 1643 | return -EFAULT; |
1da177e4 LT |
1644 | |
1645 | sent += count; | |
1646 | len -= count; | |
1647 | ||
1648 | /* Continuation fragments (no L2CAP header) */ | |
1649 | frag = &skb_shinfo(skb)->frag_list; | |
1650 | while (len) { | |
1651 | count = min_t(unsigned int, conn->mtu, len); | |
1652 | ||
1653 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1654 | if (!*frag) | |
0175d629 | 1655 | return err; |
1c2acffb GP |
1656 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
1657 | return -EFAULT; | |
1da177e4 LT |
1658 | |
1659 | sent += count; | |
1660 | len -= count; | |
1661 | ||
1662 | frag = &(*frag)->next; | |
1663 | } | |
1da177e4 LT |
1664 | |
1665 | return sent; | |
1c2acffb | 1666 | } |
1da177e4 | 1667 | |
1c2acffb GP |
1668 | static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
1669 | { | |
1670 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1671 | struct sk_buff *skb; | |
1672 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1673 | struct l2cap_hdr *lh; | |
1674 | ||
1675 | BT_DBG("sk %p len %d", sk, (int)len); | |
1676 | ||
1677 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1678 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1679 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1680 | if (!skb) | |
0175d629 | 1681 | return ERR_PTR(err); |
1c2acffb GP |
1682 | |
1683 | /* Create L2CAP header */ | |
1684 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1685 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1686 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1687 | put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2)); | |
1688 | ||
1689 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1690 | if (unlikely(err < 0)) { | |
1691 | kfree_skb(skb); | |
1692 | return ERR_PTR(err); | |
1693 | } | |
1694 | return skb; | |
1695 | } | |
1696 | ||
1697 | static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len) | |
1698 | { | |
1699 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1700 | struct sk_buff *skb; | |
1701 | int err, count, hlen = L2CAP_HDR_SIZE; | |
1702 | struct l2cap_hdr *lh; | |
1703 | ||
1704 | BT_DBG("sk %p len %d", sk, (int)len); | |
1705 | ||
1706 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1707 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1708 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1709 | if (!skb) | |
0175d629 | 1710 | return ERR_PTR(err); |
1c2acffb GP |
1711 | |
1712 | /* Create L2CAP header */ | |
1713 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1714 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1715 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1716 | ||
1717 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1718 | if (unlikely(err < 0)) { | |
1719 | kfree_skb(skb); | |
1720 | return ERR_PTR(err); | |
1721 | } | |
1722 | return skb; | |
1723 | } | |
1724 | ||
6840ed07 | 1725 | static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
1c2acffb GP |
1726 | { |
1727 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1728 | struct sk_buff *skb; | |
1729 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1730 | struct l2cap_hdr *lh; | |
1731 | ||
1732 | BT_DBG("sk %p len %d", sk, (int)len); | |
1733 | ||
0ee0d208 GP |
1734 | if (!conn) |
1735 | return ERR_PTR(-ENOTCONN); | |
1736 | ||
c74e560c GP |
1737 | if (sdulen) |
1738 | hlen += 2; | |
1739 | ||
fcc203c3 GP |
1740 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1741 | hlen += 2; | |
1742 | ||
1c2acffb GP |
1743 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
1744 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1745 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1746 | if (!skb) | |
0175d629 | 1747 | return ERR_PTR(err); |
1c2acffb GP |
1748 | |
1749 | /* Create L2CAP header */ | |
1750 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1751 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1752 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1753 | put_unaligned_le16(control, skb_put(skb, 2)); | |
c74e560c GP |
1754 | if (sdulen) |
1755 | put_unaligned_le16(sdulen, skb_put(skb, 2)); | |
1c2acffb GP |
1756 | |
1757 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1758 | if (unlikely(err < 0)) { | |
1759 | kfree_skb(skb); | |
1760 | return ERR_PTR(err); | |
1761 | } | |
e90bac06 | 1762 | |
fcc203c3 GP |
1763 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1764 | put_unaligned_le16(0, skb_put(skb, 2)); | |
1765 | ||
e90bac06 | 1766 | bt_cb(skb)->retries = 0; |
1c2acffb | 1767 | return skb; |
1da177e4 LT |
1768 | } |
1769 | ||
c74e560c GP |
1770 | static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len) |
1771 | { | |
1772 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1773 | struct sk_buff *skb; | |
1774 | struct sk_buff_head sar_queue; | |
1775 | u16 control; | |
1776 | size_t size = 0; | |
1777 | ||
ff12fd64 | 1778 | skb_queue_head_init(&sar_queue); |
c74e560c | 1779 | control = L2CAP_SDU_START; |
1c762159 | 1780 | skb = l2cap_create_iframe_pdu(sk, msg, pi->remote_mps, control, len); |
c74e560c GP |
1781 | if (IS_ERR(skb)) |
1782 | return PTR_ERR(skb); | |
1783 | ||
1784 | __skb_queue_tail(&sar_queue, skb); | |
1c762159 GP |
1785 | len -= pi->remote_mps; |
1786 | size += pi->remote_mps; | |
c74e560c GP |
1787 | |
1788 | while (len > 0) { | |
1789 | size_t buflen; | |
1790 | ||
1c762159 | 1791 | if (len > pi->remote_mps) { |
44651b85 | 1792 | control = L2CAP_SDU_CONTINUE; |
1c762159 | 1793 | buflen = pi->remote_mps; |
c74e560c | 1794 | } else { |
44651b85 | 1795 | control = L2CAP_SDU_END; |
c74e560c GP |
1796 | buflen = len; |
1797 | } | |
1798 | ||
6840ed07 | 1799 | skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0); |
c74e560c GP |
1800 | if (IS_ERR(skb)) { |
1801 | skb_queue_purge(&sar_queue); | |
1802 | return PTR_ERR(skb); | |
1803 | } | |
1804 | ||
1805 | __skb_queue_tail(&sar_queue, skb); | |
1806 | len -= buflen; | |
1807 | size += buflen; | |
c74e560c GP |
1808 | } |
1809 | skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk)); | |
1810 | if (sk->sk_send_head == NULL) | |
1811 | sk->sk_send_head = sar_queue.next; | |
1812 | ||
1813 | return size; | |
1814 | } | |
1815 | ||
1da177e4 LT |
1816 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
1817 | { | |
1818 | struct sock *sk = sock->sk; | |
1c2acffb GP |
1819 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
1820 | struct sk_buff *skb; | |
1821 | u16 control; | |
1822 | int err; | |
1da177e4 LT |
1823 | |
1824 | BT_DBG("sock %p, sk %p", sock, sk); | |
1825 | ||
c1cbe4b7 BL |
1826 | err = sock_error(sk); |
1827 | if (err) | |
1828 | return err; | |
1da177e4 LT |
1829 | |
1830 | if (msg->msg_flags & MSG_OOB) | |
1831 | return -EOPNOTSUPP; | |
1832 | ||
1da177e4 LT |
1833 | lock_sock(sk); |
1834 | ||
1c2acffb | 1835 | if (sk->sk_state != BT_CONNECTED) { |
1da177e4 | 1836 | err = -ENOTCONN; |
1c2acffb GP |
1837 | goto done; |
1838 | } | |
1da177e4 | 1839 | |
1c2acffb GP |
1840 | /* Connectionless channel */ |
1841 | if (sk->sk_type == SOCK_DGRAM) { | |
1842 | skb = l2cap_create_connless_pdu(sk, msg, len); | |
9a9c6a34 | 1843 | if (IS_ERR(skb)) { |
477fffb0 | 1844 | err = PTR_ERR(skb); |
9a9c6a34 GP |
1845 | } else { |
1846 | l2cap_do_send(sk, skb); | |
1847 | err = len; | |
1848 | } | |
1c2acffb GP |
1849 | goto done; |
1850 | } | |
1851 | ||
1852 | switch (pi->mode) { | |
1853 | case L2CAP_MODE_BASIC: | |
c69163e9 GP |
1854 | /* Check outgoing MTU */ |
1855 | if (len > pi->omtu) { | |
f9dd11b0 | 1856 | err = -EMSGSIZE; |
c69163e9 GP |
1857 | goto done; |
1858 | } | |
1859 | ||
1c2acffb GP |
1860 | /* Create a basic PDU */ |
1861 | skb = l2cap_create_basic_pdu(sk, msg, len); | |
1862 | if (IS_ERR(skb)) { | |
1863 | err = PTR_ERR(skb); | |
1864 | goto done; | |
1865 | } | |
1866 | ||
9a9c6a34 GP |
1867 | l2cap_do_send(sk, skb); |
1868 | err = len; | |
1c2acffb GP |
1869 | break; |
1870 | ||
1871 | case L2CAP_MODE_ERTM: | |
6840ed07 | 1872 | case L2CAP_MODE_STREAMING: |
1c2acffb | 1873 | /* Entire SDU fits into one PDU */ |
1c762159 | 1874 | if (len <= pi->remote_mps) { |
1c2acffb | 1875 | control = L2CAP_SDU_UNSEGMENTED; |
6840ed07 | 1876 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
1c2acffb GP |
1877 | if (IS_ERR(skb)) { |
1878 | err = PTR_ERR(skb); | |
1879 | goto done; | |
1880 | } | |
c74e560c | 1881 | __skb_queue_tail(TX_QUEUE(sk), skb); |
dfc909be | 1882 | |
c74e560c GP |
1883 | if (sk->sk_send_head == NULL) |
1884 | sk->sk_send_head = skb; | |
dfc909be | 1885 | |
1c2acffb | 1886 | } else { |
c74e560c GP |
1887 | /* Segment SDU into multiples PDUs */ |
1888 | err = l2cap_sar_segment_sdu(sk, msg, len); | |
1889 | if (err < 0) | |
1890 | goto done; | |
1c2acffb | 1891 | } |
1c2acffb | 1892 | |
dfc909be | 1893 | if (pi->mode == L2CAP_MODE_STREAMING) { |
305682e8 | 1894 | l2cap_streaming_send(sk); |
dfc909be | 1895 | } else { |
6e2b6722 GP |
1896 | if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY && |
1897 | pi->conn_state && L2CAP_CONN_WAIT_F) { | |
1898 | err = len; | |
1899 | break; | |
1900 | } | |
6840ed07 | 1901 | err = l2cap_ertm_send(sk); |
dfc909be | 1902 | } |
6840ed07 | 1903 | |
9e917af1 | 1904 | if (err >= 0) |
1c2acffb GP |
1905 | err = len; |
1906 | break; | |
1907 | ||
1908 | default: | |
1909 | BT_DBG("bad state %1.1x", pi->mode); | |
bc766db2 | 1910 | err = -EBADFD; |
1c2acffb GP |
1911 | } |
1912 | ||
1913 | done: | |
1da177e4 LT |
1914 | release_sock(sk); |
1915 | return err; | |
1916 | } | |
1917 | ||
f66dc81f MH |
1918 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1919 | { | |
1920 | struct sock *sk = sock->sk; | |
1921 | ||
1922 | lock_sock(sk); | |
1923 | ||
1924 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1925 | struct l2cap_conn_rsp rsp; | |
e9aeb2dd GP |
1926 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
1927 | u8 buf[128]; | |
f66dc81f MH |
1928 | |
1929 | sk->sk_state = BT_CONFIG; | |
1930 | ||
1931 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1932 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1933 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1934 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1935 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1936 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1937 | ||
e9aeb2dd GP |
1938 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) { |
1939 | release_sock(sk); | |
1940 | return 0; | |
1941 | } | |
1942 | ||
1943 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
1944 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
1945 | l2cap_build_conf_req(sk, buf), buf); | |
1946 | l2cap_pi(sk)->num_conf_req++; | |
1947 | ||
f66dc81f MH |
1948 | release_sock(sk); |
1949 | return 0; | |
1950 | } | |
1951 | ||
1952 | release_sock(sk); | |
1953 | ||
6fdf482b MM |
1954 | if (sock->type == SOCK_STREAM) |
1955 | return bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); | |
1956 | ||
f66dc81f MH |
1957 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); |
1958 | } | |
1959 | ||
b7058842 | 1960 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
1961 | { |
1962 | struct sock *sk = sock->sk; | |
1963 | struct l2cap_options opts; | |
f29972de | 1964 | int len, err = 0; |
1da177e4 LT |
1965 | u32 opt; |
1966 | ||
1967 | BT_DBG("sk %p", sk); | |
1968 | ||
1969 | lock_sock(sk); | |
1970 | ||
1971 | switch (optname) { | |
1972 | case L2CAP_OPTIONS: | |
eaa71b31 GP |
1973 | if (sk->sk_state == BT_CONNECTED) { |
1974 | err = -EINVAL; | |
1975 | break; | |
1976 | } | |
1977 | ||
0878b666 MH |
1978 | opts.imtu = l2cap_pi(sk)->imtu; |
1979 | opts.omtu = l2cap_pi(sk)->omtu; | |
1980 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1981 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1982 | opts.fcs = l2cap_pi(sk)->fcs; |
68d7f0ce | 1983 | opts.max_tx = l2cap_pi(sk)->max_tx; |
14b5aa71 | 1984 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
0878b666 | 1985 | |
1da177e4 LT |
1986 | len = min_t(unsigned int, sizeof(opts), optlen); |
1987 | if (copy_from_user((char *) &opts, optval, len)) { | |
1988 | err = -EFAULT; | |
1989 | break; | |
1990 | } | |
0878b666 | 1991 | |
45d65c46 GP |
1992 | if (opts.txwin_size > L2CAP_DEFAULT_TX_WINDOW) { |
1993 | err = -EINVAL; | |
1994 | break; | |
1995 | } | |
1996 | ||
0041ecfa JPRV |
1997 | l2cap_pi(sk)->mode = opts.mode; |
1998 | switch (l2cap_pi(sk)->mode) { | |
1999 | case L2CAP_MODE_BASIC: | |
85eb53c6 | 2000 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_STATE2_DEVICE; |
0041ecfa JPRV |
2001 | break; |
2002 | case L2CAP_MODE_ERTM: | |
2003 | case L2CAP_MODE_STREAMING: | |
d1c4a17d | 2004 | if (!disable_ertm) |
0041ecfa JPRV |
2005 | break; |
2006 | /* fall through */ | |
2007 | default: | |
2008 | err = -EINVAL; | |
2009 | break; | |
2010 | } | |
2011 | ||
c6b03cf9 MH |
2012 | l2cap_pi(sk)->imtu = opts.imtu; |
2013 | l2cap_pi(sk)->omtu = opts.omtu; | |
fcc203c3 | 2014 | l2cap_pi(sk)->fcs = opts.fcs; |
68d7f0ce | 2015 | l2cap_pi(sk)->max_tx = opts.max_tx; |
14b5aa71 | 2016 | l2cap_pi(sk)->tx_win = (__u8)opts.txwin_size; |
1da177e4 LT |
2017 | break; |
2018 | ||
2019 | case L2CAP_LM: | |
2020 | if (get_user(opt, (u32 __user *) optval)) { | |
2021 | err = -EFAULT; | |
2022 | break; | |
2023 | } | |
2024 | ||
2af6b9d5 MH |
2025 | if (opt & L2CAP_LM_AUTH) |
2026 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
2027 | if (opt & L2CAP_LM_ENCRYPT) | |
2028 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
2029 | if (opt & L2CAP_LM_SECURE) | |
2030 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
2031 | ||
2032 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
2033 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
2034 | break; |
2035 | ||
2036 | default: | |
2037 | err = -ENOPROTOOPT; | |
2038 | break; | |
2039 | } | |
2040 | ||
2041 | release_sock(sk); | |
2042 | return err; | |
2043 | } | |
2044 | ||
b7058842 | 2045 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
d58daf42 MH |
2046 | { |
2047 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
2048 | struct bt_security sec; |
2049 | int len, err = 0; | |
f66dc81f | 2050 | u32 opt; |
d58daf42 MH |
2051 | |
2052 | BT_DBG("sk %p", sk); | |
2053 | ||
2054 | if (level == SOL_L2CAP) | |
2055 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
2056 | ||
0588d94f MH |
2057 | if (level != SOL_BLUETOOTH) |
2058 | return -ENOPROTOOPT; | |
2059 | ||
d58daf42 MH |
2060 | lock_sock(sk); |
2061 | ||
2062 | switch (optname) { | |
2af6b9d5 | 2063 | case BT_SECURITY: |
bd3c9e25 GP |
2064 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
2065 | && sk->sk_type != SOCK_RAW) { | |
0588d94f MH |
2066 | err = -EINVAL; |
2067 | break; | |
2068 | } | |
2069 | ||
2af6b9d5 MH |
2070 | sec.level = BT_SECURITY_LOW; |
2071 | ||
2072 | len = min_t(unsigned int, sizeof(sec), optlen); | |
2073 | if (copy_from_user((char *) &sec, optval, len)) { | |
2074 | err = -EFAULT; | |
2075 | break; | |
2076 | } | |
2077 | ||
2078 | if (sec.level < BT_SECURITY_LOW || | |
2079 | sec.level > BT_SECURITY_HIGH) { | |
2080 | err = -EINVAL; | |
2081 | break; | |
2082 | } | |
2083 | ||
2084 | l2cap_pi(sk)->sec_level = sec.level; | |
2085 | break; | |
2086 | ||
f66dc81f MH |
2087 | case BT_DEFER_SETUP: |
2088 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
2089 | err = -EINVAL; | |
2090 | break; | |
2091 | } | |
2092 | ||
2093 | if (get_user(opt, (u32 __user *) optval)) { | |
2094 | err = -EFAULT; | |
2095 | break; | |
2096 | } | |
2097 | ||
2098 | bt_sk(sk)->defer_setup = opt; | |
2099 | break; | |
2100 | ||
d58daf42 MH |
2101 | default: |
2102 | err = -ENOPROTOOPT; | |
2103 | break; | |
2104 | } | |
2105 | ||
2106 | release_sock(sk); | |
2107 | return err; | |
2108 | } | |
2109 | ||
2110 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
2111 | { |
2112 | struct sock *sk = sock->sk; | |
2113 | struct l2cap_options opts; | |
2114 | struct l2cap_conninfo cinfo; | |
2115 | int len, err = 0; | |
2af6b9d5 | 2116 | u32 opt; |
1da177e4 LT |
2117 | |
2118 | BT_DBG("sk %p", sk); | |
2119 | ||
2120 | if (get_user(len, optlen)) | |
2121 | return -EFAULT; | |
2122 | ||
2123 | lock_sock(sk); | |
2124 | ||
2125 | switch (optname) { | |
2126 | case L2CAP_OPTIONS: | |
2127 | opts.imtu = l2cap_pi(sk)->imtu; | |
2128 | opts.omtu = l2cap_pi(sk)->omtu; | |
2129 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 2130 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 2131 | opts.fcs = l2cap_pi(sk)->fcs; |
68d7f0ce | 2132 | opts.max_tx = l2cap_pi(sk)->max_tx; |
14b5aa71 | 2133 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
1da177e4 LT |
2134 | |
2135 | len = min_t(unsigned int, len, sizeof(opts)); | |
2136 | if (copy_to_user(optval, (char *) &opts, len)) | |
2137 | err = -EFAULT; | |
2138 | ||
2139 | break; | |
2140 | ||
2141 | case L2CAP_LM: | |
2af6b9d5 MH |
2142 | switch (l2cap_pi(sk)->sec_level) { |
2143 | case BT_SECURITY_LOW: | |
2144 | opt = L2CAP_LM_AUTH; | |
2145 | break; | |
2146 | case BT_SECURITY_MEDIUM: | |
2147 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
2148 | break; | |
2149 | case BT_SECURITY_HIGH: | |
2150 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2151 | L2CAP_LM_SECURE; | |
2152 | break; | |
2153 | default: | |
2154 | opt = 0; | |
2155 | break; | |
2156 | } | |
2157 | ||
2158 | if (l2cap_pi(sk)->role_switch) | |
2159 | opt |= L2CAP_LM_MASTER; | |
2160 | ||
2161 | if (l2cap_pi(sk)->force_reliable) | |
2162 | opt |= L2CAP_LM_RELIABLE; | |
2163 | ||
2164 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
2165 | err = -EFAULT; |
2166 | break; | |
2167 | ||
2168 | case L2CAP_CONNINFO: | |
f66dc81f MH |
2169 | if (sk->sk_state != BT_CONNECTED && |
2170 | !(sk->sk_state == BT_CONNECT2 && | |
2171 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
2172 | err = -ENOTCONN; |
2173 | break; | |
2174 | } | |
2175 | ||
2176 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
2177 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
2178 | ||
2179 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
2180 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
2181 | err = -EFAULT; | |
2182 | ||
2183 | break; | |
2184 | ||
2185 | default: | |
2186 | err = -ENOPROTOOPT; | |
2187 | break; | |
2188 | } | |
2189 | ||
2190 | release_sock(sk); | |
2191 | return err; | |
2192 | } | |
2193 | ||
d58daf42 MH |
2194 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
2195 | { | |
2196 | struct sock *sk = sock->sk; | |
2af6b9d5 | 2197 | struct bt_security sec; |
d58daf42 MH |
2198 | int len, err = 0; |
2199 | ||
2200 | BT_DBG("sk %p", sk); | |
2201 | ||
2202 | if (level == SOL_L2CAP) | |
2203 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
2204 | ||
0588d94f MH |
2205 | if (level != SOL_BLUETOOTH) |
2206 | return -ENOPROTOOPT; | |
2207 | ||
d58daf42 MH |
2208 | if (get_user(len, optlen)) |
2209 | return -EFAULT; | |
2210 | ||
2211 | lock_sock(sk); | |
2212 | ||
2213 | switch (optname) { | |
2af6b9d5 | 2214 | case BT_SECURITY: |
bd3c9e25 GP |
2215 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
2216 | && sk->sk_type != SOCK_RAW) { | |
0588d94f MH |
2217 | err = -EINVAL; |
2218 | break; | |
2219 | } | |
2220 | ||
2af6b9d5 MH |
2221 | sec.level = l2cap_pi(sk)->sec_level; |
2222 | ||
2223 | len = min_t(unsigned int, len, sizeof(sec)); | |
2224 | if (copy_to_user(optval, (char *) &sec, len)) | |
2225 | err = -EFAULT; | |
2226 | ||
2227 | break; | |
2228 | ||
f66dc81f MH |
2229 | case BT_DEFER_SETUP: |
2230 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
2231 | err = -EINVAL; | |
2232 | break; | |
2233 | } | |
2234 | ||
2235 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
2236 | err = -EFAULT; | |
2237 | ||
2238 | break; | |
2239 | ||
d58daf42 MH |
2240 | default: |
2241 | err = -ENOPROTOOPT; | |
2242 | break; | |
2243 | } | |
2244 | ||
2245 | release_sock(sk); | |
2246 | return err; | |
2247 | } | |
2248 | ||
1da177e4 LT |
2249 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
2250 | { | |
2251 | struct sock *sk = sock->sk; | |
2252 | int err = 0; | |
2253 | ||
2254 | BT_DBG("sock %p, sk %p", sock, sk); | |
2255 | ||
2256 | if (!sk) | |
2257 | return 0; | |
2258 | ||
2259 | lock_sock(sk); | |
2260 | if (!sk->sk_shutdown) { | |
6161c038 GP |
2261 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
2262 | err = __l2cap_wait_ack(sk); | |
2263 | ||
1da177e4 LT |
2264 | sk->sk_shutdown = SHUTDOWN_MASK; |
2265 | l2cap_sock_clear_timer(sk); | |
2266 | __l2cap_sock_close(sk, 0); | |
2267 | ||
2268 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
2269 | err = bt_sock_wait_state(sk, BT_CLOSED, |
2270 | sk->sk_lingertime); | |
1da177e4 | 2271 | } |
9b108fc0 GP |
2272 | |
2273 | if (!err && sk->sk_err) | |
2274 | err = -sk->sk_err; | |
2275 | ||
1da177e4 LT |
2276 | release_sock(sk); |
2277 | return err; | |
2278 | } | |
2279 | ||
2280 | static int l2cap_sock_release(struct socket *sock) | |
2281 | { | |
2282 | struct sock *sk = sock->sk; | |
2283 | int err; | |
2284 | ||
2285 | BT_DBG("sock %p, sk %p", sock, sk); | |
2286 | ||
2287 | if (!sk) | |
2288 | return 0; | |
2289 | ||
2290 | err = l2cap_sock_shutdown(sock, 2); | |
2291 | ||
2292 | sock_orphan(sk); | |
2293 | l2cap_sock_kill(sk); | |
2294 | return err; | |
2295 | } | |
2296 | ||
1da177e4 LT |
2297 | static void l2cap_chan_ready(struct sock *sk) |
2298 | { | |
2299 | struct sock *parent = bt_sk(sk)->parent; | |
2300 | ||
2301 | BT_DBG("sk %p, parent %p", sk, parent); | |
2302 | ||
2303 | l2cap_pi(sk)->conf_state = 0; | |
2304 | l2cap_sock_clear_timer(sk); | |
2305 | ||
2306 | if (!parent) { | |
2307 | /* Outgoing channel. | |
2308 | * Wake up socket sleeping on connect. | |
2309 | */ | |
2310 | sk->sk_state = BT_CONNECTED; | |
2311 | sk->sk_state_change(sk); | |
2312 | } else { | |
2313 | /* Incoming channel. | |
2314 | * Wake up socket sleeping on accept. | |
2315 | */ | |
2316 | parent->sk_data_ready(parent, 0); | |
2317 | } | |
2318 | } | |
2319 | ||
2320 | /* Copy frame to all raw sockets on that connection */ | |
2321 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
2322 | { | |
2323 | struct l2cap_chan_list *l = &conn->chan_list; | |
2324 | struct sk_buff *nskb; | |
af05b30b | 2325 | struct sock *sk; |
1da177e4 LT |
2326 | |
2327 | BT_DBG("conn %p", conn); | |
2328 | ||
2329 | read_lock(&l->lock); | |
2330 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2331 | if (sk->sk_type != SOCK_RAW) | |
2332 | continue; | |
2333 | ||
2334 | /* Don't send frame to the socket it came from */ | |
2335 | if (skb->sk == sk) | |
2336 | continue; | |
af05b30b GP |
2337 | nskb = skb_clone(skb, GFP_ATOMIC); |
2338 | if (!nskb) | |
1da177e4 LT |
2339 | continue; |
2340 | ||
2341 | if (sock_queue_rcv_skb(sk, nskb)) | |
2342 | kfree_skb(nskb); | |
2343 | } | |
2344 | read_unlock(&l->lock); | |
2345 | } | |
2346 | ||
2347 | /* ---- L2CAP signalling commands ---- */ | |
2348 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
2349 | u8 code, u8 ident, u16 dlen, void *data) | |
2350 | { | |
2351 | struct sk_buff *skb, **frag; | |
2352 | struct l2cap_cmd_hdr *cmd; | |
2353 | struct l2cap_hdr *lh; | |
2354 | int len, count; | |
2355 | ||
af05b30b GP |
2356 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
2357 | conn, code, ident, dlen); | |
1da177e4 LT |
2358 | |
2359 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
2360 | count = min_t(unsigned int, conn->mtu, len); | |
2361 | ||
2362 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
2363 | if (!skb) | |
2364 | return NULL; | |
2365 | ||
2366 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c | 2367 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
8db4dc46 | 2368 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
1da177e4 LT |
2369 | |
2370 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
2371 | cmd->code = code; | |
2372 | cmd->ident = ident; | |
aca3192c | 2373 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
2374 | |
2375 | if (dlen) { | |
2376 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
2377 | memcpy(skb_put(skb, count), data, count); | |
2378 | data += count; | |
2379 | } | |
2380 | ||
2381 | len -= skb->len; | |
2382 | ||
2383 | /* Continuation fragments (no L2CAP header) */ | |
2384 | frag = &skb_shinfo(skb)->frag_list; | |
2385 | while (len) { | |
2386 | count = min_t(unsigned int, conn->mtu, len); | |
2387 | ||
2388 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
2389 | if (!*frag) | |
2390 | goto fail; | |
2391 | ||
2392 | memcpy(skb_put(*frag, count), data, count); | |
2393 | ||
2394 | len -= count; | |
2395 | data += count; | |
2396 | ||
2397 | frag = &(*frag)->next; | |
2398 | } | |
2399 | ||
2400 | return skb; | |
2401 | ||
2402 | fail: | |
2403 | kfree_skb(skb); | |
2404 | return NULL; | |
2405 | } | |
2406 | ||
2407 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
2408 | { | |
2409 | struct l2cap_conf_opt *opt = *ptr; | |
2410 | int len; | |
2411 | ||
2412 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
2413 | *ptr += len; | |
2414 | ||
2415 | *type = opt->type; | |
2416 | *olen = opt->len; | |
2417 | ||
2418 | switch (opt->len) { | |
2419 | case 1: | |
2420 | *val = *((u8 *) opt->val); | |
2421 | break; | |
2422 | ||
2423 | case 2: | |
bfaaeb3e | 2424 | *val = get_unaligned_le16(opt->val); |
1da177e4 LT |
2425 | break; |
2426 | ||
2427 | case 4: | |
bfaaeb3e | 2428 | *val = get_unaligned_le32(opt->val); |
1da177e4 LT |
2429 | break; |
2430 | ||
2431 | default: | |
2432 | *val = (unsigned long) opt->val; | |
2433 | break; | |
2434 | } | |
2435 | ||
2436 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
2437 | return len; | |
2438 | } | |
2439 | ||
1da177e4 LT |
2440 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
2441 | { | |
2442 | struct l2cap_conf_opt *opt = *ptr; | |
2443 | ||
2444 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
2445 | ||
2446 | opt->type = type; | |
2447 | opt->len = len; | |
2448 | ||
2449 | switch (len) { | |
2450 | case 1: | |
2451 | *((u8 *) opt->val) = val; | |
2452 | break; | |
2453 | ||
2454 | case 2: | |
4f8b691c | 2455 | put_unaligned_le16(val, opt->val); |
1da177e4 LT |
2456 | break; |
2457 | ||
2458 | case 4: | |
4f8b691c | 2459 | put_unaligned_le32(val, opt->val); |
1da177e4 LT |
2460 | break; |
2461 | ||
2462 | default: | |
2463 | memcpy(opt->val, (void *) val, len); | |
2464 | break; | |
2465 | } | |
2466 | ||
2467 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
2468 | } | |
2469 | ||
c1b4f43b GP |
2470 | static void l2cap_ack_timeout(unsigned long arg) |
2471 | { | |
2472 | struct sock *sk = (void *) arg; | |
2473 | ||
2474 | bh_lock_sock(sk); | |
2475 | l2cap_send_ack(l2cap_pi(sk)); | |
2476 | bh_unlock_sock(sk); | |
2477 | } | |
2478 | ||
0565c1c2 GP |
2479 | static inline void l2cap_ertm_init(struct sock *sk) |
2480 | { | |
2481 | l2cap_pi(sk)->expected_ack_seq = 0; | |
2482 | l2cap_pi(sk)->unacked_frames = 0; | |
2483 | l2cap_pi(sk)->buffer_seq = 0; | |
803020c6 | 2484 | l2cap_pi(sk)->num_acked = 0; |
d5392c8f | 2485 | l2cap_pi(sk)->frames_sent = 0; |
0565c1c2 GP |
2486 | |
2487 | setup_timer(&l2cap_pi(sk)->retrans_timer, | |
2488 | l2cap_retrans_timeout, (unsigned long) sk); | |
2489 | setup_timer(&l2cap_pi(sk)->monitor_timer, | |
2490 | l2cap_monitor_timeout, (unsigned long) sk); | |
c1b4f43b GP |
2491 | setup_timer(&l2cap_pi(sk)->ack_timer, |
2492 | l2cap_ack_timeout, (unsigned long) sk); | |
0565c1c2 GP |
2493 | |
2494 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b GP |
2495 | __skb_queue_head_init(BUSY_QUEUE(sk)); |
2496 | ||
2497 | INIT_WORK(&l2cap_pi(sk)->busy_work, l2cap_busy_work); | |
218bb9df GP |
2498 | |
2499 | sk->sk_backlog_rcv = l2cap_ertm_data_rcv; | |
0565c1c2 GP |
2500 | } |
2501 | ||
f2fcfcd6 GP |
2502 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
2503 | { | |
2504 | switch (mode) { | |
2505 | case L2CAP_MODE_STREAMING: | |
2506 | case L2CAP_MODE_ERTM: | |
2507 | if (l2cap_mode_supported(mode, remote_feat_mask)) | |
2508 | return mode; | |
2509 | /* fall through */ | |
2510 | default: | |
2511 | return L2CAP_MODE_BASIC; | |
2512 | } | |
2513 | } | |
2514 | ||
1da177e4 LT |
2515 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
2516 | { | |
2517 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2518 | struct l2cap_conf_req *req = data; | |
bd3c9e25 | 2519 | struct l2cap_conf_rfc rfc = { .mode = pi->mode }; |
1da177e4 LT |
2520 | void *ptr = req->data; |
2521 | ||
2522 | BT_DBG("sk %p", sk); | |
2523 | ||
f2fcfcd6 GP |
2524 | if (pi->num_conf_req || pi->num_conf_rsp) |
2525 | goto done; | |
2526 | ||
2527 | switch (pi->mode) { | |
2528 | case L2CAP_MODE_STREAMING: | |
2529 | case L2CAP_MODE_ERTM: | |
2ba13ed6 | 2530 | if (pi->conf_state & L2CAP_CONF_STATE2_DEVICE) |
85eb53c6 | 2531 | break; |
85eb53c6 | 2532 | |
2ba13ed6 | 2533 | /* fall through */ |
f2fcfcd6 GP |
2534 | default: |
2535 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2536 | break; | |
2537 | } | |
2538 | ||
2539 | done: | |
65c7c491 MH |
2540 | switch (pi->mode) { |
2541 | case L2CAP_MODE_BASIC: | |
2542 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
2543 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
62547752 | 2544 | |
63406504 GP |
2545 | if (!(pi->conn->feat_mask & L2CAP_FEAT_ERTM) && |
2546 | !(pi->conn->feat_mask & L2CAP_FEAT_STREAMING)) | |
2547 | break; | |
2548 | ||
62547752 GP |
2549 | rfc.mode = L2CAP_MODE_BASIC; |
2550 | rfc.txwin_size = 0; | |
2551 | rfc.max_transmit = 0; | |
2552 | rfc.retrans_timeout = 0; | |
2553 | rfc.monitor_timeout = 0; | |
2554 | rfc.max_pdu_size = 0; | |
2555 | ||
63406504 GP |
2556 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
2557 | (unsigned long) &rfc); | |
65c7c491 MH |
2558 | break; |
2559 | ||
2560 | case L2CAP_MODE_ERTM: | |
2561 | rfc.mode = L2CAP_MODE_ERTM; | |
14b5aa71 | 2562 | rfc.txwin_size = pi->tx_win; |
68d7f0ce | 2563 | rfc.max_transmit = pi->max_tx; |
f2fcfcd6 GP |
2564 | rfc.retrans_timeout = 0; |
2565 | rfc.monitor_timeout = 0; | |
c74e560c | 2566 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
d1daa091 | 2567 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
1c762159 | 2568 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
f2fcfcd6 | 2569 | |
63406504 GP |
2570 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
2571 | (unsigned long) &rfc); | |
2572 | ||
fcc203c3 GP |
2573 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
2574 | break; | |
2575 | ||
2576 | if (pi->fcs == L2CAP_FCS_NONE || | |
2577 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2578 | pi->fcs = L2CAP_FCS_NONE; | |
2579 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2580 | } | |
f2fcfcd6 GP |
2581 | break; |
2582 | ||
2583 | case L2CAP_MODE_STREAMING: | |
2584 | rfc.mode = L2CAP_MODE_STREAMING; | |
2585 | rfc.txwin_size = 0; | |
2586 | rfc.max_transmit = 0; | |
2587 | rfc.retrans_timeout = 0; | |
2588 | rfc.monitor_timeout = 0; | |
c74e560c | 2589 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
d1daa091 | 2590 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
1c762159 | 2591 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
65c7c491 | 2592 | |
63406504 GP |
2593 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
2594 | (unsigned long) &rfc); | |
2595 | ||
fcc203c3 GP |
2596 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
2597 | break; | |
2598 | ||
2599 | if (pi->fcs == L2CAP_FCS_NONE || | |
2600 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2601 | pi->fcs = L2CAP_FCS_NONE; | |
2602 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2603 | } | |
65c7c491 MH |
2604 | break; |
2605 | } | |
1da177e4 LT |
2606 | |
2607 | /* FIXME: Need actual value of the flush timeout */ | |
2608 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
2609 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
2610 | ||
aca3192c YH |
2611 | req->dcid = cpu_to_le16(pi->dcid); |
2612 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
2613 | |
2614 | return ptr - data; | |
2615 | } | |
2616 | ||
5dee9e7c | 2617 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
2618 | { |
2619 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
2620 | struct l2cap_conf_rsp *rsp = data; |
2621 | void *ptr = rsp->data; | |
2622 | void *req = pi->conf_req; | |
2623 | int len = pi->conf_len; | |
2624 | int type, hint, olen; | |
2625 | unsigned long val; | |
6464f35f | 2626 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 2627 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 2628 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 2629 | |
5dee9e7c | 2630 | BT_DBG("sk %p", sk); |
820ae1b8 | 2631 | |
5dee9e7c MH |
2632 | while (len >= L2CAP_CONF_OPT_SIZE) { |
2633 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 2634 | |
589d2746 | 2635 | hint = type & L2CAP_CONF_HINT; |
47ec1dcd | 2636 | type &= L2CAP_CONF_MASK; |
5dee9e7c MH |
2637 | |
2638 | switch (type) { | |
2639 | case L2CAP_CONF_MTU: | |
861d6882 | 2640 | mtu = val; |
5dee9e7c MH |
2641 | break; |
2642 | ||
2643 | case L2CAP_CONF_FLUSH_TO: | |
2644 | pi->flush_to = val; | |
2645 | break; | |
2646 | ||
2647 | case L2CAP_CONF_QOS: | |
2648 | break; | |
2649 | ||
6464f35f MH |
2650 | case L2CAP_CONF_RFC: |
2651 | if (olen == sizeof(rfc)) | |
2652 | memcpy(&rfc, (void *) val, olen); | |
2653 | break; | |
2654 | ||
fcc203c3 GP |
2655 | case L2CAP_CONF_FCS: |
2656 | if (val == L2CAP_FCS_NONE) | |
2657 | pi->conf_state |= L2CAP_CONF_NO_FCS_RECV; | |
2658 | ||
2659 | break; | |
2660 | ||
5dee9e7c MH |
2661 | default: |
2662 | if (hint) | |
2663 | break; | |
2664 | ||
2665 | result = L2CAP_CONF_UNKNOWN; | |
2666 | *((u8 *) ptr++) = type; | |
2667 | break; | |
2668 | } | |
2669 | } | |
2670 | ||
e9aeb2dd | 2671 | if (pi->num_conf_rsp || pi->num_conf_req > 1) |
f2fcfcd6 GP |
2672 | goto done; |
2673 | ||
2674 | switch (pi->mode) { | |
2675 | case L2CAP_MODE_STREAMING: | |
2676 | case L2CAP_MODE_ERTM: | |
85eb53c6 GP |
2677 | if (!(pi->conf_state & L2CAP_CONF_STATE2_DEVICE)) { |
2678 | pi->mode = l2cap_select_mode(rfc.mode, | |
2679 | pi->conn->feat_mask); | |
2680 | break; | |
2681 | } | |
2682 | ||
742e519b | 2683 | if (pi->mode != rfc.mode) |
f2fcfcd6 | 2684 | return -ECONNREFUSED; |
742e519b | 2685 | |
f2fcfcd6 | 2686 | break; |
f2fcfcd6 GP |
2687 | } |
2688 | ||
2689 | done: | |
2690 | if (pi->mode != rfc.mode) { | |
2691 | result = L2CAP_CONF_UNACCEPT; | |
2692 | rfc.mode = pi->mode; | |
2693 | ||
2694 | if (pi->num_conf_rsp == 1) | |
2695 | return -ECONNREFUSED; | |
2696 | ||
2697 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2698 | sizeof(rfc), (unsigned long) &rfc); | |
2699 | } | |
2700 | ||
2701 | ||
5dee9e7c MH |
2702 | if (result == L2CAP_CONF_SUCCESS) { |
2703 | /* Configure output options and let the other side know | |
2704 | * which ones we don't like. */ | |
2705 | ||
f2fcfcd6 GP |
2706 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
2707 | result = L2CAP_CONF_UNACCEPT; | |
2708 | else { | |
2709 | pi->omtu = mtu; | |
2710 | pi->conf_state |= L2CAP_CONF_MTU_DONE; | |
2711 | } | |
2712 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
6464f35f | 2713 | |
f2fcfcd6 GP |
2714 | switch (rfc.mode) { |
2715 | case L2CAP_MODE_BASIC: | |
2716 | pi->fcs = L2CAP_FCS_NONE; | |
2717 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
2718 | break; | |
2719 | ||
2720 | case L2CAP_MODE_ERTM: | |
2721 | pi->remote_tx_win = rfc.txwin_size; | |
2722 | pi->remote_max_tx = rfc.max_transmit; | |
86b1b263 MM |
2723 | |
2724 | if (le16_to_cpu(rfc.max_pdu_size) > pi->conn->mtu - 10) | |
2725 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); | |
1c762159 GP |
2726 | |
2727 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); | |
f2fcfcd6 | 2728 | |
10467e9e GP |
2729 | rfc.retrans_timeout = |
2730 | le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO); | |
2731 | rfc.monitor_timeout = | |
2732 | le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO); | |
f2fcfcd6 GP |
2733 | |
2734 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2735 | |
2736 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2737 | sizeof(rfc), (unsigned long) &rfc); | |
2738 | ||
f2fcfcd6 GP |
2739 | break; |
2740 | ||
2741 | case L2CAP_MODE_STREAMING: | |
86b1b263 MM |
2742 | if (le16_to_cpu(rfc.max_pdu_size) > pi->conn->mtu - 10) |
2743 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); | |
1c762159 GP |
2744 | |
2745 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); | |
f2fcfcd6 GP |
2746 | |
2747 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2748 | |
2749 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2750 | sizeof(rfc), (unsigned long) &rfc); | |
2751 | ||
f2fcfcd6 GP |
2752 | break; |
2753 | ||
2754 | default: | |
5dee9e7c | 2755 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 2756 | |
6464f35f | 2757 | memset(&rfc, 0, sizeof(rfc)); |
f2fcfcd6 GP |
2758 | rfc.mode = pi->mode; |
2759 | } | |
6464f35f | 2760 | |
f2fcfcd6 GP |
2761 | if (result == L2CAP_CONF_SUCCESS) |
2762 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
2763 | } | |
5dee9e7c MH |
2764 | rsp->scid = cpu_to_le16(pi->dcid); |
2765 | rsp->result = cpu_to_le16(result); | |
2766 | rsp->flags = cpu_to_le16(0x0000); | |
2767 | ||
2768 | return ptr - data; | |
1da177e4 LT |
2769 | } |
2770 | ||
f2fcfcd6 GP |
2771 | static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result) |
2772 | { | |
2773 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2774 | struct l2cap_conf_req *req = data; | |
2775 | void *ptr = req->data; | |
2776 | int type, olen; | |
2777 | unsigned long val; | |
2778 | struct l2cap_conf_rfc rfc; | |
2779 | ||
2780 | BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data); | |
2781 | ||
2782 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2783 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2784 | ||
2785 | switch (type) { | |
2786 | case L2CAP_CONF_MTU: | |
2787 | if (val < L2CAP_DEFAULT_MIN_MTU) { | |
2788 | *result = L2CAP_CONF_UNACCEPT; | |
8183b775 | 2789 | pi->imtu = L2CAP_DEFAULT_MIN_MTU; |
f2fcfcd6 | 2790 | } else |
8183b775 AE |
2791 | pi->imtu = val; |
2792 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
f2fcfcd6 GP |
2793 | break; |
2794 | ||
2795 | case L2CAP_CONF_FLUSH_TO: | |
2796 | pi->flush_to = val; | |
2797 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, | |
2798 | 2, pi->flush_to); | |
2799 | break; | |
2800 | ||
2801 | case L2CAP_CONF_RFC: | |
2802 | if (olen == sizeof(rfc)) | |
2803 | memcpy(&rfc, (void *)val, olen); | |
2804 | ||
2805 | if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) && | |
2806 | rfc.mode != pi->mode) | |
2807 | return -ECONNREFUSED; | |
2808 | ||
f2fcfcd6 GP |
2809 | pi->fcs = 0; |
2810 | ||
2811 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2812 | sizeof(rfc), (unsigned long) &rfc); | |
2813 | break; | |
2814 | } | |
2815 | } | |
2816 | ||
6c2ea7a8 GP |
2817 | if (pi->mode == L2CAP_MODE_BASIC && pi->mode != rfc.mode) |
2818 | return -ECONNREFUSED; | |
2819 | ||
2820 | pi->mode = rfc.mode; | |
2821 | ||
f2fcfcd6 GP |
2822 | if (*result == L2CAP_CONF_SUCCESS) { |
2823 | switch (rfc.mode) { | |
2824 | case L2CAP_MODE_ERTM: | |
10467e9e GP |
2825 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
2826 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); | |
1c762159 | 2827 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
f2fcfcd6 GP |
2828 | break; |
2829 | case L2CAP_MODE_STREAMING: | |
1c762159 | 2830 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
f2fcfcd6 GP |
2831 | } |
2832 | } | |
2833 | ||
2834 | req->dcid = cpu_to_le16(pi->dcid); | |
2835 | req->flags = cpu_to_le16(0x0000); | |
2836 | ||
2837 | return ptr - data; | |
2838 | } | |
2839 | ||
5dee9e7c | 2840 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
2841 | { |
2842 | struct l2cap_conf_rsp *rsp = data; | |
2843 | void *ptr = rsp->data; | |
1da177e4 | 2844 | |
5dee9e7c | 2845 | BT_DBG("sk %p", sk); |
1da177e4 | 2846 | |
aca3192c | 2847 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 2848 | rsp->result = cpu_to_le16(result); |
aca3192c | 2849 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
2850 | |
2851 | return ptr - data; | |
2852 | } | |
2853 | ||
7b1c0049 GP |
2854 | static void l2cap_conf_rfc_get(struct sock *sk, void *rsp, int len) |
2855 | { | |
2856 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2857 | int type, olen; | |
2858 | unsigned long val; | |
2859 | struct l2cap_conf_rfc rfc; | |
2860 | ||
2861 | BT_DBG("sk %p, rsp %p, len %d", sk, rsp, len); | |
2862 | ||
2863 | if ((pi->mode != L2CAP_MODE_ERTM) && (pi->mode != L2CAP_MODE_STREAMING)) | |
2864 | return; | |
2865 | ||
2866 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2867 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2868 | ||
2869 | switch (type) { | |
2870 | case L2CAP_CONF_RFC: | |
2871 | if (olen == sizeof(rfc)) | |
2872 | memcpy(&rfc, (void *)val, olen); | |
2873 | goto done; | |
2874 | } | |
2875 | } | |
2876 | ||
2877 | done: | |
2878 | switch (rfc.mode) { | |
2879 | case L2CAP_MODE_ERTM: | |
10467e9e GP |
2880 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
2881 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); | |
7b1c0049 GP |
2882 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
2883 | break; | |
2884 | case L2CAP_MODE_STREAMING: | |
2885 | pi->mps = le16_to_cpu(rfc.max_pdu_size); | |
2886 | } | |
2887 | } | |
2888 | ||
4e8402a3 MH |
2889 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2890 | { | |
2891 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
2892 | ||
2893 | if (rej->reason != 0x0000) | |
2894 | return 0; | |
2895 | ||
2896 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
2897 | cmd->ident == conn->info_ident) { | |
4e8402a3 | 2898 | del_timer(&conn->info_timer); |
984947dc MH |
2899 | |
2900 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
e1027a7c | 2901 | conn->info_ident = 0; |
984947dc | 2902 | |
4e8402a3 MH |
2903 | l2cap_conn_start(conn); |
2904 | } | |
2905 | ||
2906 | return 0; | |
2907 | } | |
2908 | ||
1da177e4 LT |
2909 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2910 | { | |
2911 | struct l2cap_chan_list *list = &conn->chan_list; | |
2912 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
2913 | struct l2cap_conn_rsp rsp; | |
d793fe8c | 2914 | struct sock *parent, *sk = NULL; |
e7c29cb1 | 2915 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
2916 | |
2917 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 2918 | __le16 psm = req->psm; |
1da177e4 LT |
2919 | |
2920 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
2921 | ||
2922 | /* Check if we have socket listening on psm */ | |
2923 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
2924 | if (!parent) { | |
2925 | result = L2CAP_CR_BAD_PSM; | |
2926 | goto sendresp; | |
2927 | } | |
2928 | ||
e0f0cb56 GP |
2929 | bh_lock_sock(parent); |
2930 | ||
e7c29cb1 MH |
2931 | /* Check if the ACL is secure enough (if not SDP) */ |
2932 | if (psm != cpu_to_le16(0x0001) && | |
2933 | !hci_conn_check_link_mode(conn->hcon)) { | |
2950f21a | 2934 | conn->disc_reason = 0x05; |
e7c29cb1 MH |
2935 | result = L2CAP_CR_SEC_BLOCK; |
2936 | goto response; | |
2937 | } | |
2938 | ||
1da177e4 LT |
2939 | result = L2CAP_CR_NO_MEM; |
2940 | ||
2941 | /* Check for backlog size */ | |
2942 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 2943 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
2944 | goto response; |
2945 | } | |
2946 | ||
3b1e0a65 | 2947 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
2948 | if (!sk) |
2949 | goto response; | |
2950 | ||
fd1278d7 | 2951 | write_lock_bh(&list->lock); |
1da177e4 LT |
2952 | |
2953 | /* Check if we already have channel with that dcid */ | |
2954 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 2955 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2956 | sock_set_flag(sk, SOCK_ZAPPED); |
2957 | l2cap_sock_kill(sk); | |
2958 | goto response; | |
2959 | } | |
2960 | ||
2961 | hci_conn_hold(conn->hcon); | |
2962 | ||
2963 | l2cap_sock_init(sk, parent); | |
2964 | bacpy(&bt_sk(sk)->src, conn->src); | |
2965 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
2966 | l2cap_pi(sk)->psm = psm; | |
2967 | l2cap_pi(sk)->dcid = scid; | |
2968 | ||
2969 | __l2cap_chan_add(conn, sk, parent); | |
2970 | dcid = l2cap_pi(sk)->scid; | |
2971 | ||
2972 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
2973 | ||
1da177e4 LT |
2974 | l2cap_pi(sk)->ident = cmd->ident; |
2975 | ||
984947dc | 2976 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
2af6b9d5 | 2977 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
2978 | if (bt_sk(sk)->defer_setup) { |
2979 | sk->sk_state = BT_CONNECT2; | |
2980 | result = L2CAP_CR_PEND; | |
2981 | status = L2CAP_CS_AUTHOR_PEND; | |
2982 | parent->sk_data_ready(parent, 0); | |
2983 | } else { | |
2984 | sk->sk_state = BT_CONFIG; | |
2985 | result = L2CAP_CR_SUCCESS; | |
2986 | status = L2CAP_CS_NO_INFO; | |
2987 | } | |
79d554a6 MH |
2988 | } else { |
2989 | sk->sk_state = BT_CONNECT2; | |
2990 | result = L2CAP_CR_PEND; | |
2991 | status = L2CAP_CS_AUTHEN_PEND; | |
2992 | } | |
2993 | } else { | |
2994 | sk->sk_state = BT_CONNECT2; | |
2995 | result = L2CAP_CR_PEND; | |
2996 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
2997 | } |
2998 | ||
fd1278d7 | 2999 | write_unlock_bh(&list->lock); |
1da177e4 LT |
3000 | |
3001 | response: | |
3002 | bh_unlock_sock(parent); | |
3003 | ||
3004 | sendresp: | |
aca3192c YH |
3005 | rsp.scid = cpu_to_le16(scid); |
3006 | rsp.dcid = cpu_to_le16(dcid); | |
3007 | rsp.result = cpu_to_le16(result); | |
3008 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 3009 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
3010 | |
3011 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
3012 | struct l2cap_info_req info; | |
3013 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
3014 | ||
3015 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
3016 | conn->info_ident = l2cap_get_ident(conn); | |
3017 | ||
3018 | mod_timer(&conn->info_timer, jiffies + | |
3019 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
3020 | ||
3021 | l2cap_send_cmd(conn, conn->info_ident, | |
3022 | L2CAP_INFO_REQ, sizeof(info), &info); | |
3023 | } | |
3024 | ||
d793fe8c | 3025 | if (sk && !(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) && |
e9aeb2dd GP |
3026 | result == L2CAP_CR_SUCCESS) { |
3027 | u8 buf[128]; | |
3028 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
3029 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
3030 | l2cap_build_conf_req(sk, buf), buf); | |
3031 | l2cap_pi(sk)->num_conf_req++; | |
3032 | } | |
3033 | ||
1da177e4 LT |
3034 | return 0; |
3035 | } | |
3036 | ||
3037 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3038 | { | |
3039 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
3040 | u16 scid, dcid, result, status; | |
3041 | struct sock *sk; | |
3042 | u8 req[128]; | |
3043 | ||
3044 | scid = __le16_to_cpu(rsp->scid); | |
3045 | dcid = __le16_to_cpu(rsp->dcid); | |
3046 | result = __le16_to_cpu(rsp->result); | |
3047 | status = __le16_to_cpu(rsp->status); | |
3048 | ||
3049 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
3050 | ||
3051 | if (scid) { | |
af05b30b GP |
3052 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
3053 | if (!sk) | |
57d3b22b | 3054 | return -EFAULT; |
1da177e4 | 3055 | } else { |
af05b30b GP |
3056 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
3057 | if (!sk) | |
57d3b22b | 3058 | return -EFAULT; |
1da177e4 LT |
3059 | } |
3060 | ||
3061 | switch (result) { | |
3062 | case L2CAP_CR_SUCCESS: | |
3063 | sk->sk_state = BT_CONFIG; | |
3064 | l2cap_pi(sk)->ident = 0; | |
3065 | l2cap_pi(sk)->dcid = dcid; | |
6a8d3010 MH |
3066 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
3067 | ||
e9aeb2dd GP |
3068 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) |
3069 | break; | |
3070 | ||
3071 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
3072 | ||
1da177e4 LT |
3073 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
3074 | l2cap_build_conf_req(sk, req), req); | |
f2fcfcd6 | 3075 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
3076 | break; |
3077 | ||
3078 | case L2CAP_CR_PEND: | |
6a8d3010 | 3079 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 LT |
3080 | break; |
3081 | ||
3082 | default: | |
a49184c2 AE |
3083 | /* don't delete l2cap channel if sk is owned by user */ |
3084 | if (sock_owned_by_user(sk)) { | |
3085 | sk->sk_state = BT_DISCONN; | |
3086 | l2cap_sock_clear_timer(sk); | |
3087 | l2cap_sock_set_timer(sk, HZ / 5); | |
3088 | break; | |
3089 | } | |
3090 | ||
1da177e4 LT |
3091 | l2cap_chan_del(sk, ECONNREFUSED); |
3092 | break; | |
3093 | } | |
3094 | ||
3095 | bh_unlock_sock(sk); | |
3096 | return 0; | |
3097 | } | |
3098 | ||
8c462b60 MM |
3099 | static inline void set_default_fcs(struct l2cap_pinfo *pi) |
3100 | { | |
3101 | /* FCS is enabled only in ERTM or streaming mode, if one or both | |
3102 | * sides request it. | |
3103 | */ | |
3104 | if (pi->mode != L2CAP_MODE_ERTM && pi->mode != L2CAP_MODE_STREAMING) | |
3105 | pi->fcs = L2CAP_FCS_NONE; | |
3106 | else if (!(pi->conf_state & L2CAP_CONF_NO_FCS_RECV)) | |
3107 | pi->fcs = L2CAP_FCS_CRC16; | |
3108 | } | |
3109 | ||
88219a0f | 3110 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
3111 | { |
3112 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
3113 | u16 dcid, flags; | |
3114 | u8 rsp[64]; | |
3115 | struct sock *sk; | |
5dee9e7c | 3116 | int len; |
1da177e4 LT |
3117 | |
3118 | dcid = __le16_to_cpu(req->dcid); | |
3119 | flags = __le16_to_cpu(req->flags); | |
3120 | ||
3121 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
3122 | ||
af05b30b GP |
3123 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
3124 | if (!sk) | |
1da177e4 LT |
3125 | return -ENOENT; |
3126 | ||
df6bd743 GP |
3127 | if (sk->sk_state != BT_CONFIG) { |
3128 | struct l2cap_cmd_rej rej; | |
3129 | ||
3130 | rej.reason = cpu_to_le16(0x0002); | |
3131 | l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, | |
3132 | sizeof(rej), &rej); | |
354f60a9 | 3133 | goto unlock; |
df6bd743 | 3134 | } |
354f60a9 | 3135 | |
5dee9e7c | 3136 | /* Reject if config buffer is too small. */ |
88219a0f | 3137 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
3138 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
3139 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
3140 | l2cap_build_conf_rsp(sk, rsp, | |
3141 | L2CAP_CONF_REJECT, flags), rsp); | |
3142 | goto unlock; | |
3143 | } | |
3144 | ||
3145 | /* Store config. */ | |
3146 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
3147 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
3148 | |
3149 | if (flags & 0x0001) { | |
3150 | /* Incomplete config. Send empty response. */ | |
3151 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
3152 | l2cap_build_conf_rsp(sk, rsp, |
3153 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
3154 | goto unlock; |
3155 | } | |
3156 | ||
3157 | /* Complete config. */ | |
5dee9e7c | 3158 | len = l2cap_parse_conf_req(sk, rsp); |
f2fcfcd6 | 3159 | if (len < 0) { |
9b108fc0 | 3160 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
1da177e4 | 3161 | goto unlock; |
f2fcfcd6 | 3162 | } |
1da177e4 | 3163 | |
5dee9e7c | 3164 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
f2fcfcd6 | 3165 | l2cap_pi(sk)->num_conf_rsp++; |
5dee9e7c | 3166 | |
5dee9e7c MH |
3167 | /* Reset config buffer. */ |
3168 | l2cap_pi(sk)->conf_len = 0; | |
3169 | ||
876d9484 MH |
3170 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
3171 | goto unlock; | |
3172 | ||
1da177e4 | 3173 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
8c462b60 | 3174 | set_default_fcs(l2cap_pi(sk)); |
fcc203c3 | 3175 | |
1da177e4 | 3176 | sk->sk_state = BT_CONNECTED; |
e90bac06 | 3177 | |
0565c1c2 GP |
3178 | l2cap_pi(sk)->next_tx_seq = 0; |
3179 | l2cap_pi(sk)->expected_tx_seq = 0; | |
1c2acffb | 3180 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
3181 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
3182 | l2cap_ertm_init(sk); | |
3183 | ||
1da177e4 | 3184 | l2cap_chan_ready(sk); |
876d9484 MH |
3185 | goto unlock; |
3186 | } | |
3187 | ||
3188 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 3189 | u8 buf[64]; |
ab3e5715 | 3190 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; |
1da177e4 | 3191 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 3192 | l2cap_build_conf_req(sk, buf), buf); |
f2fcfcd6 | 3193 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
3194 | } |
3195 | ||
3196 | unlock: | |
3197 | bh_unlock_sock(sk); | |
3198 | return 0; | |
3199 | } | |
3200 | ||
3201 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3202 | { | |
3203 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
3204 | u16 scid, flags, result; | |
3205 | struct sock *sk; | |
7b1c0049 | 3206 | int len = cmd->len - sizeof(*rsp); |
1da177e4 LT |
3207 | |
3208 | scid = __le16_to_cpu(rsp->scid); | |
3209 | flags = __le16_to_cpu(rsp->flags); | |
3210 | result = __le16_to_cpu(rsp->result); | |
3211 | ||
af05b30b GP |
3212 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
3213 | scid, flags, result); | |
1da177e4 | 3214 | |
af05b30b GP |
3215 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
3216 | if (!sk) | |
1da177e4 LT |
3217 | return 0; |
3218 | ||
3219 | switch (result) { | |
3220 | case L2CAP_CONF_SUCCESS: | |
7b1c0049 | 3221 | l2cap_conf_rfc_get(sk, rsp->data, len); |
1da177e4 LT |
3222 | break; |
3223 | ||
3224 | case L2CAP_CONF_UNACCEPT: | |
f2fcfcd6 | 3225 | if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
f2fcfcd6 GP |
3226 | char req[64]; |
3227 | ||
c2c77ec8 | 3228 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
9b108fc0 | 3229 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
c2c77ec8 AE |
3230 | goto done; |
3231 | } | |
3232 | ||
f2fcfcd6 GP |
3233 | /* throw out any old stored conf requests */ |
3234 | result = L2CAP_CONF_SUCCESS; | |
3235 | len = l2cap_parse_conf_rsp(sk, rsp->data, | |
3236 | len, req, &result); | |
3237 | if (len < 0) { | |
9b108fc0 | 3238 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
f2fcfcd6 GP |
3239 | goto done; |
3240 | } | |
3241 | ||
3242 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
3243 | L2CAP_CONF_REQ, len, req); | |
3244 | l2cap_pi(sk)->num_conf_req++; | |
3245 | if (result != L2CAP_CONF_SUCCESS) | |
3246 | goto done; | |
3247 | break; | |
1da177e4 LT |
3248 | } |
3249 | ||
8e87d142 | 3250 | default: |
b1235d79 | 3251 | sk->sk_err = ECONNRESET; |
1da177e4 | 3252 | l2cap_sock_set_timer(sk, HZ * 5); |
9b108fc0 | 3253 | l2cap_send_disconn_req(conn, sk, ECONNRESET); |
1da177e4 LT |
3254 | goto done; |
3255 | } | |
3256 | ||
3257 | if (flags & 0x01) | |
3258 | goto done; | |
3259 | ||
1da177e4 LT |
3260 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
3261 | ||
3262 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
8c462b60 | 3263 | set_default_fcs(l2cap_pi(sk)); |
fcc203c3 | 3264 | |
1da177e4 | 3265 | sk->sk_state = BT_CONNECTED; |
0565c1c2 | 3266 | l2cap_pi(sk)->next_tx_seq = 0; |
1c2acffb | 3267 | l2cap_pi(sk)->expected_tx_seq = 0; |
1c2acffb | 3268 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
3269 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
3270 | l2cap_ertm_init(sk); | |
3271 | ||
1da177e4 LT |
3272 | l2cap_chan_ready(sk); |
3273 | } | |
3274 | ||
3275 | done: | |
3276 | bh_unlock_sock(sk); | |
3277 | return 0; | |
3278 | } | |
3279 | ||
3280 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3281 | { | |
3282 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
3283 | struct l2cap_disconn_rsp rsp; | |
3284 | u16 dcid, scid; | |
3285 | struct sock *sk; | |
3286 | ||
3287 | scid = __le16_to_cpu(req->scid); | |
3288 | dcid = __le16_to_cpu(req->dcid); | |
3289 | ||
3290 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
3291 | ||
af05b30b GP |
3292 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
3293 | if (!sk) | |
1da177e4 LT |
3294 | return 0; |
3295 | ||
aca3192c YH |
3296 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
3297 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
3298 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
3299 | ||
3300 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3301 | ||
a49184c2 AE |
3302 | /* don't delete l2cap channel if sk is owned by user */ |
3303 | if (sock_owned_by_user(sk)) { | |
3304 | sk->sk_state = BT_DISCONN; | |
3305 | l2cap_sock_clear_timer(sk); | |
3306 | l2cap_sock_set_timer(sk, HZ / 5); | |
3307 | bh_unlock_sock(sk); | |
3308 | return 0; | |
3309 | } | |
3310 | ||
1da177e4 LT |
3311 | l2cap_chan_del(sk, ECONNRESET); |
3312 | bh_unlock_sock(sk); | |
3313 | ||
3314 | l2cap_sock_kill(sk); | |
3315 | return 0; | |
3316 | } | |
3317 | ||
3318 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3319 | { | |
3320 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
3321 | u16 dcid, scid; | |
3322 | struct sock *sk; | |
3323 | ||
3324 | scid = __le16_to_cpu(rsp->scid); | |
3325 | dcid = __le16_to_cpu(rsp->dcid); | |
3326 | ||
3327 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
3328 | ||
af05b30b GP |
3329 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
3330 | if (!sk) | |
1da177e4 LT |
3331 | return 0; |
3332 | ||
a49184c2 AE |
3333 | /* don't delete l2cap channel if sk is owned by user */ |
3334 | if (sock_owned_by_user(sk)) { | |
3335 | sk->sk_state = BT_DISCONN; | |
3336 | l2cap_sock_clear_timer(sk); | |
3337 | l2cap_sock_set_timer(sk, HZ / 5); | |
3338 | bh_unlock_sock(sk); | |
3339 | return 0; | |
3340 | } | |
3341 | ||
1da177e4 LT |
3342 | l2cap_chan_del(sk, 0); |
3343 | bh_unlock_sock(sk); | |
3344 | ||
3345 | l2cap_sock_kill(sk); | |
3346 | return 0; | |
3347 | } | |
3348 | ||
3349 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3350 | { | |
3351 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
3352 | u16 type; |
3353 | ||
3354 | type = __le16_to_cpu(req->type); | |
3355 | ||
3356 | BT_DBG("type 0x%4.4x", type); | |
3357 | ||
f0709e03 MH |
3358 | if (type == L2CAP_IT_FEAT_MASK) { |
3359 | u8 buf[8]; | |
44dd46de | 3360 | u32 feat_mask = l2cap_feat_mask; |
f0709e03 MH |
3361 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
3362 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
3363 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
d1c4a17d | 3364 | if (!disable_ertm) |
fcc203c3 GP |
3365 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
3366 | | L2CAP_FEAT_FCS; | |
1b7bf4ed | 3367 | put_unaligned_le32(feat_mask, rsp->data); |
f0709e03 MH |
3368 | l2cap_send_cmd(conn, cmd->ident, |
3369 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
e1027a7c MH |
3370 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
3371 | u8 buf[12]; | |
3372 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
3373 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
3374 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
3375 | memcpy(buf + 4, l2cap_fixed_chan, 8); | |
3376 | l2cap_send_cmd(conn, cmd->ident, | |
3377 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
f0709e03 MH |
3378 | } else { |
3379 | struct l2cap_info_rsp rsp; | |
3380 | rsp.type = cpu_to_le16(type); | |
3381 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
3382 | l2cap_send_cmd(conn, cmd->ident, | |
3383 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
3384 | } | |
1da177e4 LT |
3385 | |
3386 | return 0; | |
3387 | } | |
3388 | ||
3389 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
3390 | { | |
3391 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
3392 | u16 type, result; | |
3393 | ||
3394 | type = __le16_to_cpu(rsp->type); | |
3395 | result = __le16_to_cpu(rsp->result); | |
3396 | ||
3397 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
3398 | ||
4e8402a3 MH |
3399 | del_timer(&conn->info_timer); |
3400 | ||
adb08ede VT |
3401 | if (result != L2CAP_IR_SUCCESS) { |
3402 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
3403 | conn->info_ident = 0; | |
3404 | ||
3405 | l2cap_conn_start(conn); | |
3406 | ||
3407 | return 0; | |
3408 | } | |
3409 | ||
984947dc | 3410 | if (type == L2CAP_IT_FEAT_MASK) { |
83985319 | 3411 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 | 3412 | |
47ec1dcd | 3413 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
e1027a7c MH |
3414 | struct l2cap_info_req req; |
3415 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
3416 | ||
3417 | conn->info_ident = l2cap_get_ident(conn); | |
3418 | ||
3419 | l2cap_send_cmd(conn, conn->info_ident, | |
3420 | L2CAP_INFO_REQ, sizeof(req), &req); | |
3421 | } else { | |
3422 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
3423 | conn->info_ident = 0; | |
3424 | ||
3425 | l2cap_conn_start(conn); | |
3426 | } | |
3427 | } else if (type == L2CAP_IT_FIXED_CHAN) { | |
984947dc | 3428 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 3429 | conn->info_ident = 0; |
984947dc MH |
3430 | |
3431 | l2cap_conn_start(conn); | |
3432 | } | |
4e8402a3 | 3433 | |
1da177e4 LT |
3434 | return 0; |
3435 | } | |
3436 | ||
3437 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
3438 | { | |
3439 | u8 *data = skb->data; | |
3440 | int len = skb->len; | |
3441 | struct l2cap_cmd_hdr cmd; | |
3442 | int err = 0; | |
3443 | ||
3444 | l2cap_raw_recv(conn, skb); | |
3445 | ||
3446 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 3447 | u16 cmd_len; |
1da177e4 LT |
3448 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
3449 | data += L2CAP_CMD_HDR_SIZE; | |
3450 | len -= L2CAP_CMD_HDR_SIZE; | |
3451 | ||
88219a0f | 3452 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 3453 | |
88219a0f | 3454 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 3455 | |
88219a0f | 3456 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
3457 | BT_DBG("corrupted command"); |
3458 | break; | |
3459 | } | |
3460 | ||
3461 | switch (cmd.code) { | |
3462 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 3463 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
3464 | break; |
3465 | ||
3466 | case L2CAP_CONN_REQ: | |
3467 | err = l2cap_connect_req(conn, &cmd, data); | |
3468 | break; | |
3469 | ||
3470 | case L2CAP_CONN_RSP: | |
3471 | err = l2cap_connect_rsp(conn, &cmd, data); | |
3472 | break; | |
3473 | ||
3474 | case L2CAP_CONF_REQ: | |
88219a0f | 3475 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
3476 | break; |
3477 | ||
3478 | case L2CAP_CONF_RSP: | |
3479 | err = l2cap_config_rsp(conn, &cmd, data); | |
3480 | break; | |
3481 | ||
3482 | case L2CAP_DISCONN_REQ: | |
3483 | err = l2cap_disconnect_req(conn, &cmd, data); | |
3484 | break; | |
3485 | ||
3486 | case L2CAP_DISCONN_RSP: | |
3487 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
3488 | break; | |
3489 | ||
3490 | case L2CAP_ECHO_REQ: | |
88219a0f | 3491 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
3492 | break; |
3493 | ||
3494 | case L2CAP_ECHO_RSP: | |
3495 | break; | |
3496 | ||
3497 | case L2CAP_INFO_REQ: | |
3498 | err = l2cap_information_req(conn, &cmd, data); | |
3499 | break; | |
3500 | ||
3501 | case L2CAP_INFO_RSP: | |
3502 | err = l2cap_information_rsp(conn, &cmd, data); | |
3503 | break; | |
3504 | ||
3505 | default: | |
3506 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
3507 | err = -EINVAL; | |
3508 | break; | |
3509 | } | |
3510 | ||
3511 | if (err) { | |
3512 | struct l2cap_cmd_rej rej; | |
3513 | BT_DBG("error %d", err); | |
3514 | ||
3515 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 3516 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
3517 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
3518 | } | |
3519 | ||
88219a0f AV |
3520 | data += cmd_len; |
3521 | len -= cmd_len; | |
1da177e4 LT |
3522 | } |
3523 | ||
3524 | kfree_skb(skb); | |
3525 | } | |
3526 | ||
fcc203c3 GP |
3527 | static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb) |
3528 | { | |
3529 | u16 our_fcs, rcv_fcs; | |
3530 | int hdr_size = L2CAP_HDR_SIZE + 2; | |
3531 | ||
3532 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
3533 | skb_trim(skb, skb->len - 2); | |
3534 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); | |
3535 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); | |
3536 | ||
3537 | if (our_fcs != rcv_fcs) | |
7a560e5c | 3538 | return -EBADMSG; |
fcc203c3 GP |
3539 | } |
3540 | return 0; | |
3541 | } | |
3542 | ||
d5392c8f GP |
3543 | static inline void l2cap_send_i_or_rr_or_rnr(struct sock *sk) |
3544 | { | |
3545 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3546 | u16 control = 0; | |
3547 | ||
3548 | pi->frames_sent = 0; | |
d5392c8f GP |
3549 | |
3550 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3551 | ||
3552 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
64988868 | 3553 | control |= L2CAP_SUPER_RCV_NOT_READY; |
d5392c8f | 3554 | l2cap_send_sframe(pi, control); |
1890d36b | 3555 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
d5392c8f GP |
3556 | } |
3557 | ||
4ea727ef GP |
3558 | if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY) |
3559 | l2cap_retransmit_frames(sk); | |
d5392c8f GP |
3560 | |
3561 | l2cap_ertm_send(sk); | |
3562 | ||
3563 | if (!(pi->conn_state & L2CAP_CONN_LOCAL_BUSY) && | |
3564 | pi->frames_sent == 0) { | |
3565 | control |= L2CAP_SUPER_RCV_READY; | |
d5392c8f GP |
3566 | l2cap_send_sframe(pi, control); |
3567 | } | |
3568 | } | |
3569 | ||
9b53350d | 3570 | static int l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar) |
8f17154f GP |
3571 | { |
3572 | struct sk_buff *next_skb; | |
bfbacc11 JPRV |
3573 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
3574 | int tx_seq_offset, next_tx_seq_offset; | |
8f17154f GP |
3575 | |
3576 | bt_cb(skb)->tx_seq = tx_seq; | |
3577 | bt_cb(skb)->sar = sar; | |
3578 | ||
3579 | next_skb = skb_peek(SREJ_QUEUE(sk)); | |
3580 | if (!next_skb) { | |
3581 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
9b53350d | 3582 | return 0; |
8f17154f GP |
3583 | } |
3584 | ||
bfbacc11 JPRV |
3585 | tx_seq_offset = (tx_seq - pi->buffer_seq) % 64; |
3586 | if (tx_seq_offset < 0) | |
3587 | tx_seq_offset += 64; | |
3588 | ||
8f17154f | 3589 | do { |
9b53350d JPRV |
3590 | if (bt_cb(next_skb)->tx_seq == tx_seq) |
3591 | return -EINVAL; | |
3592 | ||
bfbacc11 JPRV |
3593 | next_tx_seq_offset = (bt_cb(next_skb)->tx_seq - |
3594 | pi->buffer_seq) % 64; | |
3595 | if (next_tx_seq_offset < 0) | |
3596 | next_tx_seq_offset += 64; | |
3597 | ||
3598 | if (next_tx_seq_offset > tx_seq_offset) { | |
8f17154f | 3599 | __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb); |
9b53350d | 3600 | return 0; |
8f17154f GP |
3601 | } |
3602 | ||
3603 | if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb)) | |
3604 | break; | |
3605 | ||
59203a21 | 3606 | } while ((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb))); |
8f17154f GP |
3607 | |
3608 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
9b53350d JPRV |
3609 | |
3610 | return 0; | |
8f17154f GP |
3611 | } |
3612 | ||
18778a63 GP |
3613 | static int l2cap_ertm_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
3614 | { | |
3615 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3616 | struct sk_buff *_skb; | |
1890d36b | 3617 | int err; |
18778a63 GP |
3618 | |
3619 | switch (control & L2CAP_CTRL_SAR) { | |
3620 | case L2CAP_SDU_UNSEGMENTED: | |
3621 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) | |
3622 | goto drop; | |
3623 | ||
3624 | err = sock_queue_rcv_skb(sk, skb); | |
3625 | if (!err) | |
3626 | return err; | |
3627 | ||
3628 | break; | |
3629 | ||
3630 | case L2CAP_SDU_START: | |
3631 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) | |
3632 | goto drop; | |
3633 | ||
3634 | pi->sdu_len = get_unaligned_le16(skb->data); | |
18778a63 GP |
3635 | |
3636 | if (pi->sdu_len > pi->imtu) | |
3637 | goto disconnect; | |
3638 | ||
3639 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); | |
1890d36b GP |
3640 | if (!pi->sdu) |
3641 | return -ENOMEM; | |
3642 | ||
3643 | /* pull sdu_len bytes only after alloc, because of Local Busy | |
3644 | * condition we have to be sure that this will be executed | |
3645 | * only once, i.e., when alloc does not fail */ | |
3646 | skb_pull(skb, 2); | |
18778a63 GP |
3647 | |
3648 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3649 | ||
3650 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3651 | pi->partial_sdu_len = skb->len; | |
3652 | break; | |
3653 | ||
3654 | case L2CAP_SDU_CONTINUE: | |
3655 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3656 | goto disconnect; | |
3657 | ||
3658 | if (!pi->sdu) | |
3659 | goto disconnect; | |
3660 | ||
18778a63 GP |
3661 | pi->partial_sdu_len += skb->len; |
3662 | if (pi->partial_sdu_len > pi->sdu_len) | |
3663 | goto drop; | |
3664 | ||
4178ba46 GP |
3665 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
3666 | ||
18778a63 GP |
3667 | break; |
3668 | ||
3669 | case L2CAP_SDU_END: | |
3670 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3671 | goto disconnect; | |
3672 | ||
3673 | if (!pi->sdu) | |
3674 | goto disconnect; | |
3675 | ||
1890d36b | 3676 | if (!(pi->conn_state & L2CAP_CONN_SAR_RETRY)) { |
1890d36b | 3677 | pi->partial_sdu_len += skb->len; |
18778a63 | 3678 | |
1890d36b GP |
3679 | if (pi->partial_sdu_len > pi->imtu) |
3680 | goto drop; | |
18778a63 | 3681 | |
1890d36b GP |
3682 | if (pi->partial_sdu_len != pi->sdu_len) |
3683 | goto drop; | |
4178ba46 GP |
3684 | |
3685 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
1890d36b | 3686 | } |
18778a63 GP |
3687 | |
3688 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
1890d36b GP |
3689 | if (!_skb) { |
3690 | pi->conn_state |= L2CAP_CONN_SAR_RETRY; | |
3691 | return -ENOMEM; | |
3692 | } | |
3693 | ||
18778a63 | 3694 | err = sock_queue_rcv_skb(sk, _skb); |
1890d36b | 3695 | if (err < 0) { |
18778a63 | 3696 | kfree_skb(_skb); |
1890d36b GP |
3697 | pi->conn_state |= L2CAP_CONN_SAR_RETRY; |
3698 | return err; | |
3699 | } | |
3700 | ||
3701 | pi->conn_state &= ~L2CAP_CONN_SAR_RETRY; | |
3702 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
18778a63 GP |
3703 | |
3704 | kfree_skb(pi->sdu); | |
3705 | break; | |
3706 | } | |
3707 | ||
3708 | kfree_skb(skb); | |
1890d36b | 3709 | return 0; |
18778a63 GP |
3710 | |
3711 | drop: | |
3712 | kfree_skb(pi->sdu); | |
3713 | pi->sdu = NULL; | |
3714 | ||
3715 | disconnect: | |
9b108fc0 | 3716 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); |
18778a63 GP |
3717 | kfree_skb(skb); |
3718 | return 0; | |
3719 | } | |
3720 | ||
712132eb GP |
3721 | static int l2cap_try_push_rx_skb(struct sock *sk) |
3722 | { | |
3723 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3724 | struct sk_buff *skb; | |
3725 | u16 control; | |
3726 | int err; | |
3727 | ||
3728 | while ((skb = skb_dequeue(BUSY_QUEUE(sk)))) { | |
3729 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; | |
3730 | err = l2cap_ertm_reassembly_sdu(sk, skb, control); | |
3731 | if (err < 0) { | |
3732 | skb_queue_head(BUSY_QUEUE(sk), skb); | |
3733 | return -EBUSY; | |
3734 | } | |
3735 | ||
3736 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; | |
3737 | } | |
3738 | ||
3739 | if (!(pi->conn_state & L2CAP_CONN_RNR_SENT)) | |
3740 | goto done; | |
3741 | ||
3742 | control = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3743 | control |= L2CAP_SUPER_RCV_READY | L2CAP_CTRL_POLL; | |
3744 | l2cap_send_sframe(pi, control); | |
3745 | l2cap_pi(sk)->retry_count = 1; | |
3746 | ||
3747 | del_timer(&pi->retrans_timer); | |
3748 | __mod_monitor_timer(); | |
3749 | ||
3750 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
3751 | ||
3752 | done: | |
3753 | pi->conn_state &= ~L2CAP_CONN_LOCAL_BUSY; | |
3754 | pi->conn_state &= ~L2CAP_CONN_RNR_SENT; | |
3755 | ||
3756 | BT_DBG("sk %p, Exit local busy", sk); | |
3757 | ||
3758 | return 0; | |
3759 | } | |
3760 | ||
1890d36b GP |
3761 | static void l2cap_busy_work(struct work_struct *work) |
3762 | { | |
3763 | DECLARE_WAITQUEUE(wait, current); | |
3764 | struct l2cap_pinfo *pi = | |
3765 | container_of(work, struct l2cap_pinfo, busy_work); | |
3766 | struct sock *sk = (struct sock *)pi; | |
3767 | int n_tries = 0, timeo = HZ/5, err; | |
3768 | struct sk_buff *skb; | |
1890d36b GP |
3769 | |
3770 | lock_sock(sk); | |
3771 | ||
2b0b05dd | 3772 | add_wait_queue(sk_sleep(sk), &wait); |
1890d36b GP |
3773 | while ((skb = skb_peek(BUSY_QUEUE(sk)))) { |
3774 | set_current_state(TASK_INTERRUPTIBLE); | |
3775 | ||
3776 | if (n_tries++ > L2CAP_LOCAL_BUSY_TRIES) { | |
3777 | err = -EBUSY; | |
9b108fc0 | 3778 | l2cap_send_disconn_req(pi->conn, sk, EBUSY); |
712132eb | 3779 | break; |
1890d36b GP |
3780 | } |
3781 | ||
3782 | if (!timeo) | |
3783 | timeo = HZ/5; | |
3784 | ||
3785 | if (signal_pending(current)) { | |
3786 | err = sock_intr_errno(timeo); | |
712132eb | 3787 | break; |
1890d36b GP |
3788 | } |
3789 | ||
3790 | release_sock(sk); | |
3791 | timeo = schedule_timeout(timeo); | |
3792 | lock_sock(sk); | |
3793 | ||
3794 | err = sock_error(sk); | |
3795 | if (err) | |
712132eb | 3796 | break; |
1890d36b | 3797 | |
712132eb | 3798 | if (l2cap_try_push_rx_skb(sk) == 0) |
1890d36b GP |
3799 | break; |
3800 | } | |
3801 | ||
1890d36b | 3802 | set_current_state(TASK_RUNNING); |
2b0b05dd | 3803 | remove_wait_queue(sk_sleep(sk), &wait); |
1890d36b GP |
3804 | |
3805 | release_sock(sk); | |
3806 | } | |
3807 | ||
3808 | static int l2cap_push_rx_skb(struct sock *sk, struct sk_buff *skb, u16 control) | |
3809 | { | |
3810 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3811 | int sctrl, err; | |
3812 | ||
3813 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { | |
3814 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; | |
3815 | __skb_queue_tail(BUSY_QUEUE(sk), skb); | |
712132eb GP |
3816 | return l2cap_try_push_rx_skb(sk); |
3817 | ||
3818 | ||
1890d36b GP |
3819 | } |
3820 | ||
3821 | err = l2cap_ertm_reassembly_sdu(sk, skb, control); | |
3822 | if (err >= 0) { | |
3823 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; | |
3824 | return err; | |
3825 | } | |
3826 | ||
3827 | /* Busy Condition */ | |
0e98958d GP |
3828 | BT_DBG("sk %p, Enter local busy", sk); |
3829 | ||
1890d36b GP |
3830 | pi->conn_state |= L2CAP_CONN_LOCAL_BUSY; |
3831 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; | |
3832 | __skb_queue_tail(BUSY_QUEUE(sk), skb); | |
3833 | ||
3834 | sctrl = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3835 | sctrl |= L2CAP_SUPER_RCV_NOT_READY; | |
3836 | l2cap_send_sframe(pi, sctrl); | |
3837 | ||
3838 | pi->conn_state |= L2CAP_CONN_RNR_SENT; | |
3839 | ||
7fe9b298 GP |
3840 | del_timer(&pi->ack_timer); |
3841 | ||
1890d36b GP |
3842 | queue_work(_busy_wq, &pi->busy_work); |
3843 | ||
3844 | return err; | |
3845 | } | |
3846 | ||
18778a63 | 3847 | static int l2cap_streaming_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
c74e560c GP |
3848 | { |
3849 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3850 | struct sk_buff *_skb; | |
3851 | int err = -EINVAL; | |
3852 | ||
18778a63 GP |
3853 | /* |
3854 | * TODO: We have to notify the userland if some data is lost with the | |
3855 | * Streaming Mode. | |
3856 | */ | |
3857 | ||
c74e560c GP |
3858 | switch (control & L2CAP_CTRL_SAR) { |
3859 | case L2CAP_SDU_UNSEGMENTED: | |
3860 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3861 | kfree_skb(pi->sdu); | |
3862 | break; | |
3863 | } | |
3864 | ||
3865 | err = sock_queue_rcv_skb(sk, skb); | |
3866 | if (!err) | |
3867 | return 0; | |
3868 | ||
3869 | break; | |
3870 | ||
3871 | case L2CAP_SDU_START: | |
3872 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3873 | kfree_skb(pi->sdu); | |
3874 | break; | |
3875 | } | |
3876 | ||
3877 | pi->sdu_len = get_unaligned_le16(skb->data); | |
3878 | skb_pull(skb, 2); | |
3879 | ||
052897ca GP |
3880 | if (pi->sdu_len > pi->imtu) { |
3881 | err = -EMSGSIZE; | |
3882 | break; | |
3883 | } | |
3884 | ||
c74e560c GP |
3885 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); |
3886 | if (!pi->sdu) { | |
3887 | err = -ENOMEM; | |
3888 | break; | |
3889 | } | |
3890 | ||
3891 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3892 | ||
3893 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3894 | pi->partial_sdu_len = skb->len; | |
3895 | err = 0; | |
3896 | break; | |
3897 | ||
3898 | case L2CAP_SDU_CONTINUE: | |
3899 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3900 | break; | |
3901 | ||
3902 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3903 | ||
3904 | pi->partial_sdu_len += skb->len; | |
3905 | if (pi->partial_sdu_len > pi->sdu_len) | |
3906 | kfree_skb(pi->sdu); | |
3907 | else | |
3908 | err = 0; | |
3909 | ||
3910 | break; | |
3911 | ||
3912 | case L2CAP_SDU_END: | |
3913 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3914 | break; | |
3915 | ||
3916 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3917 | ||
3918 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
3919 | pi->partial_sdu_len += skb->len; | |
3920 | ||
36f2fd58 GP |
3921 | if (pi->partial_sdu_len > pi->imtu) |
3922 | goto drop; | |
3923 | ||
c74e560c GP |
3924 | if (pi->partial_sdu_len == pi->sdu_len) { |
3925 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
3926 | err = sock_queue_rcv_skb(sk, _skb); | |
3927 | if (err < 0) | |
3928 | kfree_skb(_skb); | |
3929 | } | |
c74e560c GP |
3930 | err = 0; |
3931 | ||
36f2fd58 GP |
3932 | drop: |
3933 | kfree_skb(pi->sdu); | |
c74e560c GP |
3934 | break; |
3935 | } | |
3936 | ||
3937 | kfree_skb(skb); | |
3938 | return err; | |
3939 | } | |
3940 | ||
8f17154f GP |
3941 | static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq) |
3942 | { | |
3943 | struct sk_buff *skb; | |
afefdbc4 | 3944 | u16 control; |
8f17154f | 3945 | |
59203a21 | 3946 | while ((skb = skb_peek(SREJ_QUEUE(sk)))) { |
8f17154f GP |
3947 | if (bt_cb(skb)->tx_seq != tx_seq) |
3948 | break; | |
3949 | ||
3950 | skb = skb_dequeue(SREJ_QUEUE(sk)); | |
afefdbc4 | 3951 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
18778a63 | 3952 | l2cap_ertm_reassembly_sdu(sk, skb, control); |
8f17154f GP |
3953 | l2cap_pi(sk)->buffer_seq_srej = |
3954 | (l2cap_pi(sk)->buffer_seq_srej + 1) % 64; | |
8ff50ec0 | 3955 | tx_seq = (tx_seq + 1) % 64; |
8f17154f GP |
3956 | } |
3957 | } | |
3958 | ||
3959 | static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq) | |
3960 | { | |
3961 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3962 | struct srej_list *l, *tmp; | |
3963 | u16 control; | |
3964 | ||
59203a21 | 3965 | list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) { |
8f17154f GP |
3966 | if (l->tx_seq == tx_seq) { |
3967 | list_del(&l->list); | |
3968 | kfree(l); | |
3969 | return; | |
3970 | } | |
3971 | control = L2CAP_SUPER_SELECT_REJECT; | |
3972 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3973 | l2cap_send_sframe(pi, control); | |
3974 | list_del(&l->list); | |
3975 | list_add_tail(&l->list, SREJ_LIST(sk)); | |
3976 | } | |
3977 | } | |
3978 | ||
3979 | static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) | |
3980 | { | |
3981 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3982 | struct srej_list *new; | |
3983 | u16 control; | |
3984 | ||
3985 | while (tx_seq != pi->expected_tx_seq) { | |
3986 | control = L2CAP_SUPER_SELECT_REJECT; | |
3987 | control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3988 | l2cap_send_sframe(pi, control); | |
3989 | ||
3990 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); | |
8ff50ec0 GP |
3991 | new->tx_seq = pi->expected_tx_seq; |
3992 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
8f17154f GP |
3993 | list_add_tail(&new->list, SREJ_LIST(sk)); |
3994 | } | |
8ff50ec0 | 3995 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; |
8f17154f GP |
3996 | } |
3997 | ||
1c2acffb GP |
3998 | static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
3999 | { | |
4000 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4001 | u8 tx_seq = __get_txseq(rx_control); | |
9f121a5a | 4002 | u8 req_seq = __get_reqseq(rx_control); |
8f17154f | 4003 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
f6337c77 | 4004 | int tx_seq_offset, expected_tx_seq_offset; |
803020c6 | 4005 | int num_to_ack = (pi->tx_win/6) + 1; |
1c2acffb GP |
4006 | int err = 0; |
4007 | ||
0e98958d GP |
4008 | BT_DBG("sk %p len %d tx_seq %d rx_control 0x%4.4x", sk, skb->len, tx_seq, |
4009 | rx_control); | |
1c2acffb | 4010 | |
9b16dc65 GP |
4011 | if (L2CAP_CTRL_FINAL & rx_control && |
4012 | l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) { | |
1d8f5d16 GP |
4013 | del_timer(&pi->monitor_timer); |
4014 | if (pi->unacked_frames > 0) | |
4015 | __mod_retrans_timer(); | |
4016 | pi->conn_state &= ~L2CAP_CONN_WAIT_F; | |
4017 | } | |
4018 | ||
9f121a5a GP |
4019 | pi->expected_ack_seq = req_seq; |
4020 | l2cap_drop_acked_frames(sk); | |
4021 | ||
8f17154f GP |
4022 | if (tx_seq == pi->expected_tx_seq) |
4023 | goto expected; | |
1c2acffb | 4024 | |
9b53350d JPRV |
4025 | tx_seq_offset = (tx_seq - pi->buffer_seq) % 64; |
4026 | if (tx_seq_offset < 0) | |
4027 | tx_seq_offset += 64; | |
4028 | ||
4029 | /* invalid tx_seq */ | |
4030 | if (tx_seq_offset >= pi->tx_win) { | |
9b108fc0 | 4031 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); |
9b53350d JPRV |
4032 | goto drop; |
4033 | } | |
4034 | ||
1890d36b GP |
4035 | if (pi->conn_state == L2CAP_CONN_LOCAL_BUSY) |
4036 | goto drop; | |
4037 | ||
8f17154f GP |
4038 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
4039 | struct srej_list *first; | |
30afb5b2 | 4040 | |
8f17154f GP |
4041 | first = list_first_entry(SREJ_LIST(sk), |
4042 | struct srej_list, list); | |
4043 | if (tx_seq == first->tx_seq) { | |
4044 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
4045 | l2cap_check_srej_gap(sk, tx_seq); | |
4046 | ||
4047 | list_del(&first->list); | |
4048 | kfree(first); | |
4049 | ||
4050 | if (list_empty(SREJ_LIST(sk))) { | |
4051 | pi->buffer_seq = pi->buffer_seq_srej; | |
4052 | pi->conn_state &= ~L2CAP_CONN_SREJ_SENT; | |
855666cc | 4053 | l2cap_send_ack(pi); |
0e98958d | 4054 | BT_DBG("sk %p, Exit SREJ_SENT", sk); |
8f17154f GP |
4055 | } |
4056 | } else { | |
4057 | struct srej_list *l; | |
9b53350d JPRV |
4058 | |
4059 | /* duplicated tx_seq */ | |
4060 | if (l2cap_add_to_srej_queue(sk, skb, tx_seq, sar) < 0) | |
4061 | goto drop; | |
8f17154f GP |
4062 | |
4063 | list_for_each_entry(l, SREJ_LIST(sk), list) { | |
4064 | if (l->tx_seq == tx_seq) { | |
4065 | l2cap_resend_srejframe(sk, tx_seq); | |
4066 | return 0; | |
4067 | } | |
4068 | } | |
4069 | l2cap_send_srejframe(sk, tx_seq); | |
30afb5b2 GP |
4070 | } |
4071 | } else { | |
9b53350d JPRV |
4072 | expected_tx_seq_offset = |
4073 | (pi->expected_tx_seq - pi->buffer_seq) % 64; | |
4074 | if (expected_tx_seq_offset < 0) | |
4075 | expected_tx_seq_offset += 64; | |
4076 | ||
4077 | /* duplicated tx_seq */ | |
4078 | if (tx_seq_offset < expected_tx_seq_offset) | |
4079 | goto drop; | |
4080 | ||
8f17154f | 4081 | pi->conn_state |= L2CAP_CONN_SREJ_SENT; |
1c2acffb | 4082 | |
0e98958d GP |
4083 | BT_DBG("sk %p, Enter SREJ", sk); |
4084 | ||
8f17154f GP |
4085 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
4086 | pi->buffer_seq_srej = pi->buffer_seq; | |
4087 | ||
4088 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
1890d36b | 4089 | __skb_queue_head_init(BUSY_QUEUE(sk)); |
8f17154f GP |
4090 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
4091 | ||
ef54fd93 GP |
4092 | pi->conn_state |= L2CAP_CONN_SEND_PBIT; |
4093 | ||
8f17154f | 4094 | l2cap_send_srejframe(sk, tx_seq); |
7fe9b298 GP |
4095 | |
4096 | del_timer(&pi->ack_timer); | |
1c2acffb | 4097 | } |
30afb5b2 GP |
4098 | return 0; |
4099 | ||
8f17154f GP |
4100 | expected: |
4101 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
4102 | ||
4103 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { | |
3b1a9f3f GP |
4104 | bt_cb(skb)->tx_seq = tx_seq; |
4105 | bt_cb(skb)->sar = sar; | |
4106 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
8f17154f GP |
4107 | return 0; |
4108 | } | |
4109 | ||
2ece3684 GP |
4110 | err = l2cap_push_rx_skb(sk, skb, rx_control); |
4111 | if (err < 0) | |
4112 | return 0; | |
4113 | ||
4ec10d97 GP |
4114 | if (rx_control & L2CAP_CTRL_FINAL) { |
4115 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
4116 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4117 | else |
4118 | l2cap_retransmit_frames(sk); | |
4ec10d97 GP |
4119 | } |
4120 | ||
c1b4f43b GP |
4121 | __mod_ack_timer(); |
4122 | ||
803020c6 GP |
4123 | pi->num_acked = (pi->num_acked + 1) % num_to_ack; |
4124 | if (pi->num_acked == num_to_ack - 1) | |
9e917af1 GP |
4125 | l2cap_send_ack(pi); |
4126 | ||
8f17154f | 4127 | return 0; |
9b53350d JPRV |
4128 | |
4129 | drop: | |
4130 | kfree_skb(skb); | |
4131 | return 0; | |
1c2acffb GP |
4132 | } |
4133 | ||
e072745f | 4134 | static inline void l2cap_data_channel_rrframe(struct sock *sk, u16 rx_control) |
1c2acffb GP |
4135 | { |
4136 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
6e3a5981 | 4137 | |
0e98958d GP |
4138 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, __get_reqseq(rx_control), |
4139 | rx_control); | |
4140 | ||
6e3a5981 GP |
4141 | pi->expected_ack_seq = __get_reqseq(rx_control); |
4142 | l2cap_drop_acked_frames(sk); | |
1c2acffb | 4143 | |
e072745f | 4144 | if (rx_control & L2CAP_CTRL_POLL) { |
3cb123d1 | 4145 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; |
05fbd89d GP |
4146 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
4147 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && | |
4148 | (pi->unacked_frames > 0)) | |
4149 | __mod_retrans_timer(); | |
4150 | ||
4151 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; | |
4152 | l2cap_send_srejtail(sk); | |
4153 | } else { | |
4154 | l2cap_send_i_or_rr_or_rnr(sk); | |
05fbd89d | 4155 | } |
1d8f5d16 | 4156 | |
e072745f GP |
4157 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
4158 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; | |
4ec10d97 | 4159 | |
e072745f GP |
4160 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
4161 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4162 | else |
4163 | l2cap_retransmit_frames(sk); | |
2246b2f1 | 4164 | |
e072745f | 4165 | } else { |
e072745f GP |
4166 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
4167 | (pi->unacked_frames > 0)) | |
4168 | __mod_retrans_timer(); | |
1c2acffb | 4169 | |
2246b2f1 | 4170 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
894718a6 | 4171 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) |
e072745f | 4172 | l2cap_send_ack(pi); |
894718a6 | 4173 | else |
e072745f GP |
4174 | l2cap_ertm_send(sk); |
4175 | } | |
4176 | } | |
2246b2f1 | 4177 | |
e072745f GP |
4178 | static inline void l2cap_data_channel_rejframe(struct sock *sk, u16 rx_control) |
4179 | { | |
4180 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4181 | u8 tx_seq = __get_reqseq(rx_control); | |
30afb5b2 | 4182 | |
0e98958d GP |
4183 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4184 | ||
e072745f GP |
4185 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
4186 | ||
8abb52ee | 4187 | pi->expected_ack_seq = tx_seq; |
e072745f GP |
4188 | l2cap_drop_acked_frames(sk); |
4189 | ||
4190 | if (rx_control & L2CAP_CTRL_FINAL) { | |
4191 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
4192 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
dfc909be GP |
4193 | else |
4194 | l2cap_retransmit_frames(sk); | |
e072745f | 4195 | } else { |
dfc909be | 4196 | l2cap_retransmit_frames(sk); |
30afb5b2 | 4197 | |
0301ef04 | 4198 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
e072745f | 4199 | pi->conn_state |= L2CAP_CONN_REJ_ACT; |
e072745f GP |
4200 | } |
4201 | } | |
4202 | static inline void l2cap_data_channel_srejframe(struct sock *sk, u16 rx_control) | |
4203 | { | |
4204 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4205 | u8 tx_seq = __get_reqseq(rx_control); | |
30afb5b2 | 4206 | |
0e98958d GP |
4207 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4208 | ||
e072745f | 4209 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
2246b2f1 | 4210 | |
e072745f GP |
4211 | if (rx_control & L2CAP_CTRL_POLL) { |
4212 | pi->expected_ack_seq = tx_seq; | |
4213 | l2cap_drop_acked_frames(sk); | |
3cb123d1 GP |
4214 | |
4215 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; | |
dfc909be GP |
4216 | l2cap_retransmit_one_frame(sk, tx_seq); |
4217 | ||
e072745f | 4218 | l2cap_ertm_send(sk); |
dfc909be | 4219 | |
e072745f GP |
4220 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
4221 | pi->srej_save_reqseq = tx_seq; | |
4222 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
ef54fd93 | 4223 | } |
e072745f GP |
4224 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
4225 | if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && | |
4226 | pi->srej_save_reqseq == tx_seq) | |
4227 | pi->conn_state &= ~L2CAP_CONN_SREJ_ACT; | |
4228 | else | |
dfc909be | 4229 | l2cap_retransmit_one_frame(sk, tx_seq); |
e072745f | 4230 | } else { |
dfc909be | 4231 | l2cap_retransmit_one_frame(sk, tx_seq); |
e072745f GP |
4232 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
4233 | pi->srej_save_reqseq = tx_seq; | |
4234 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
ef54fd93 | 4235 | } |
e072745f GP |
4236 | } |
4237 | } | |
4238 | ||
4239 | static inline void l2cap_data_channel_rnrframe(struct sock *sk, u16 rx_control) | |
4240 | { | |
4241 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4242 | u8 tx_seq = __get_reqseq(rx_control); | |
4243 | ||
0e98958d GP |
4244 | BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control); |
4245 | ||
e072745f GP |
4246 | pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; |
4247 | pi->expected_ack_seq = tx_seq; | |
4248 | l2cap_drop_acked_frames(sk); | |
4249 | ||
3cb123d1 GP |
4250 | if (rx_control & L2CAP_CTRL_POLL) |
4251 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; | |
4252 | ||
99b0d4b7 GP |
4253 | if (!(pi->conn_state & L2CAP_CONN_SREJ_SENT)) { |
4254 | del_timer(&pi->retrans_timer); | |
a2e12a2a GP |
4255 | if (rx_control & L2CAP_CTRL_POLL) |
4256 | l2cap_send_rr_or_rnr(pi, L2CAP_CTRL_FINAL); | |
99b0d4b7 | 4257 | return; |
e072745f | 4258 | } |
99b0d4b7 GP |
4259 | |
4260 | if (rx_control & L2CAP_CTRL_POLL) | |
4261 | l2cap_send_srejtail(sk); | |
4262 | else | |
4263 | l2cap_send_sframe(pi, L2CAP_SUPER_RCV_READY); | |
e072745f GP |
4264 | } |
4265 | ||
4266 | static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) | |
4267 | { | |
4268 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
4269 | ||
9b16dc65 GP |
4270 | if (L2CAP_CTRL_FINAL & rx_control && |
4271 | l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) { | |
e072745f GP |
4272 | del_timer(&l2cap_pi(sk)->monitor_timer); |
4273 | if (l2cap_pi(sk)->unacked_frames > 0) | |
4274 | __mod_retrans_timer(); | |
4275 | l2cap_pi(sk)->conn_state &= ~L2CAP_CONN_WAIT_F; | |
4276 | } | |
4277 | ||
4278 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { | |
4279 | case L2CAP_SUPER_RCV_READY: | |
4280 | l2cap_data_channel_rrframe(sk, rx_control); | |
8f17154f GP |
4281 | break; |
4282 | ||
e072745f GP |
4283 | case L2CAP_SUPER_REJECT: |
4284 | l2cap_data_channel_rejframe(sk, rx_control); | |
4285 | break; | |
2246b2f1 | 4286 | |
e072745f GP |
4287 | case L2CAP_SUPER_SELECT_REJECT: |
4288 | l2cap_data_channel_srejframe(sk, rx_control); | |
4289 | break; | |
4290 | ||
4291 | case L2CAP_SUPER_RCV_NOT_READY: | |
4292 | l2cap_data_channel_rnrframe(sk, rx_control); | |
1c2acffb GP |
4293 | break; |
4294 | } | |
4295 | ||
faaebd19 | 4296 | kfree_skb(skb); |
1c2acffb GP |
4297 | return 0; |
4298 | } | |
4299 | ||
218bb9df GP |
4300 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb) |
4301 | { | |
4302 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
4303 | u16 control; | |
4304 | u8 req_seq; | |
4305 | int len, next_tx_seq_offset, req_seq_offset; | |
4306 | ||
4307 | control = get_unaligned_le16(skb->data); | |
4308 | skb_pull(skb, 2); | |
4309 | len = skb->len; | |
4310 | ||
4311 | /* | |
4312 | * We can just drop the corrupted I-frame here. | |
4313 | * Receiver will miss it and start proper recovery | |
4314 | * procedures and ask retransmission. | |
4315 | */ | |
4316 | if (l2cap_check_fcs(pi, skb)) | |
4317 | goto drop; | |
4318 | ||
4319 | if (__is_sar_start(control) && __is_iframe(control)) | |
4320 | len -= 2; | |
4321 | ||
4322 | if (pi->fcs == L2CAP_FCS_CRC16) | |
4323 | len -= 2; | |
4324 | ||
4325 | if (len > pi->mps) { | |
4326 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4327 | goto drop; | |
4328 | } | |
4329 | ||
4330 | req_seq = __get_reqseq(control); | |
4331 | req_seq_offset = (req_seq - pi->expected_ack_seq) % 64; | |
4332 | if (req_seq_offset < 0) | |
4333 | req_seq_offset += 64; | |
4334 | ||
4335 | next_tx_seq_offset = | |
4336 | (pi->next_tx_seq - pi->expected_ack_seq) % 64; | |
4337 | if (next_tx_seq_offset < 0) | |
4338 | next_tx_seq_offset += 64; | |
4339 | ||
4340 | /* check for invalid req-seq */ | |
4341 | if (req_seq_offset > next_tx_seq_offset) { | |
4342 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4343 | goto drop; | |
4344 | } | |
4345 | ||
4346 | if (__is_iframe(control)) { | |
4347 | if (len < 0) { | |
4348 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4349 | goto drop; | |
4350 | } | |
4351 | ||
4352 | l2cap_data_channel_iframe(sk, control, skb); | |
4353 | } else { | |
4354 | if (len != 0) { | |
4355 | BT_ERR("%d", len); | |
4356 | l2cap_send_disconn_req(pi->conn, sk, ECONNRESET); | |
4357 | goto drop; | |
4358 | } | |
4359 | ||
4360 | l2cap_data_channel_sframe(sk, control, skb); | |
4361 | } | |
4362 | ||
4363 | return 0; | |
4364 | ||
4365 | drop: | |
4366 | kfree_skb(skb); | |
4367 | return 0; | |
4368 | } | |
4369 | ||
1da177e4 LT |
4370 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
4371 | { | |
4372 | struct sock *sk; | |
6840ed07 | 4373 | struct l2cap_pinfo *pi; |
51893f88 | 4374 | u16 control; |
218bb9df GP |
4375 | u8 tx_seq; |
4376 | int len; | |
1da177e4 LT |
4377 | |
4378 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
4379 | if (!sk) { | |
4380 | BT_DBG("unknown cid 0x%4.4x", cid); | |
4381 | goto drop; | |
4382 | } | |
4383 | ||
6840ed07 GP |
4384 | pi = l2cap_pi(sk); |
4385 | ||
1da177e4 LT |
4386 | BT_DBG("sk %p, len %d", sk, skb->len); |
4387 | ||
4388 | if (sk->sk_state != BT_CONNECTED) | |
4389 | goto drop; | |
4390 | ||
6840ed07 | 4391 | switch (pi->mode) { |
1c2acffb GP |
4392 | case L2CAP_MODE_BASIC: |
4393 | /* If socket recv buffers overflows we drop data here | |
4394 | * which is *bad* because L2CAP has to be reliable. | |
4395 | * But we don't have any other choice. L2CAP doesn't | |
4396 | * provide flow control mechanism. */ | |
1da177e4 | 4397 | |
6840ed07 | 4398 | if (pi->imtu < skb->len) |
1c2acffb | 4399 | goto drop; |
1da177e4 | 4400 | |
1c2acffb GP |
4401 | if (!sock_queue_rcv_skb(sk, skb)) |
4402 | goto done; | |
4403 | break; | |
4404 | ||
4405 | case L2CAP_MODE_ERTM: | |
218bb9df GP |
4406 | if (!sock_owned_by_user(sk)) { |
4407 | l2cap_ertm_data_rcv(sk, skb); | |
277ffbe3 | 4408 | } else { |
218bb9df | 4409 | if (sk_add_backlog(sk, skb)) |
277ffbe3 | 4410 | goto drop; |
277ffbe3 | 4411 | } |
1c2acffb | 4412 | |
fcafde2e | 4413 | goto done; |
1c2acffb | 4414 | |
6840ed07 GP |
4415 | case L2CAP_MODE_STREAMING: |
4416 | control = get_unaligned_le16(skb->data); | |
4417 | skb_pull(skb, 2); | |
4418 | len = skb->len; | |
4419 | ||
26000089 GP |
4420 | if (l2cap_check_fcs(pi, skb)) |
4421 | goto drop; | |
4422 | ||
6840ed07 GP |
4423 | if (__is_sar_start(control)) |
4424 | len -= 2; | |
4425 | ||
fcc203c3 GP |
4426 | if (pi->fcs == L2CAP_FCS_CRC16) |
4427 | len -= 2; | |
4428 | ||
51893f88 | 4429 | if (len > pi->mps || len < 0 || __is_sframe(control)) |
6840ed07 GP |
4430 | goto drop; |
4431 | ||
4432 | tx_seq = __get_txseq(control); | |
4433 | ||
4434 | if (pi->expected_tx_seq == tx_seq) | |
4435 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
4436 | else | |
7dffe421 | 4437 | pi->expected_tx_seq = (tx_seq + 1) % 64; |
6840ed07 | 4438 | |
18778a63 | 4439 | l2cap_streaming_reassembly_sdu(sk, skb, control); |
6840ed07 GP |
4440 | |
4441 | goto done; | |
4442 | ||
1c2acffb | 4443 | default: |
e8235c6b | 4444 | BT_DBG("sk %p: bad mode 0x%2.2x", sk, pi->mode); |
1c2acffb GP |
4445 | break; |
4446 | } | |
1da177e4 LT |
4447 | |
4448 | drop: | |
4449 | kfree_skb(skb); | |
4450 | ||
4451 | done: | |
0139418c MH |
4452 | if (sk) |
4453 | bh_unlock_sock(sk); | |
4454 | ||
1da177e4 LT |
4455 | return 0; |
4456 | } | |
4457 | ||
8e036fc3 | 4458 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
4459 | { |
4460 | struct sock *sk; | |
4461 | ||
4462 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
4463 | if (!sk) | |
4464 | goto drop; | |
4465 | ||
e0f0cb56 GP |
4466 | bh_lock_sock(sk); |
4467 | ||
1da177e4 LT |
4468 | BT_DBG("sk %p, len %d", sk, skb->len); |
4469 | ||
4470 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
4471 | goto drop; | |
4472 | ||
4473 | if (l2cap_pi(sk)->imtu < skb->len) | |
4474 | goto drop; | |
4475 | ||
4476 | if (!sock_queue_rcv_skb(sk, skb)) | |
4477 | goto done; | |
4478 | ||
4479 | drop: | |
4480 | kfree_skb(skb); | |
4481 | ||
4482 | done: | |
af05b30b GP |
4483 | if (sk) |
4484 | bh_unlock_sock(sk); | |
1da177e4 LT |
4485 | return 0; |
4486 | } | |
4487 | ||
4488 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
4489 | { | |
4490 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
4491 | u16 cid, len; |
4492 | __le16 psm; | |
1da177e4 LT |
4493 | |
4494 | skb_pull(skb, L2CAP_HDR_SIZE); | |
4495 | cid = __le16_to_cpu(lh->cid); | |
4496 | len = __le16_to_cpu(lh->len); | |
4497 | ||
1c2acffb GP |
4498 | if (len != skb->len) { |
4499 | kfree_skb(skb); | |
4500 | return; | |
4501 | } | |
4502 | ||
1da177e4 LT |
4503 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
4504 | ||
4505 | switch (cid) { | |
8db4dc46 | 4506 | case L2CAP_CID_SIGNALING: |
1da177e4 LT |
4507 | l2cap_sig_channel(conn, skb); |
4508 | break; | |
4509 | ||
8db4dc46 | 4510 | case L2CAP_CID_CONN_LESS: |
1b7bf4ed | 4511 | psm = get_unaligned_le16(skb->data); |
1da177e4 LT |
4512 | skb_pull(skb, 2); |
4513 | l2cap_conless_channel(conn, psm, skb); | |
4514 | break; | |
4515 | ||
4516 | default: | |
4517 | l2cap_data_channel(conn, cid, skb); | |
4518 | break; | |
4519 | } | |
4520 | } | |
4521 | ||
4522 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
4523 | ||
4524 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
4525 | { | |
4526 | int exact = 0, lm1 = 0, lm2 = 0; | |
4527 | register struct sock *sk; | |
4528 | struct hlist_node *node; | |
4529 | ||
4530 | if (type != ACL_LINK) | |
963cf687 | 4531 | return -EINVAL; |
1da177e4 LT |
4532 | |
4533 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
4534 | ||
4535 | /* Find listening sockets and check their link_mode */ | |
4536 | read_lock(&l2cap_sk_list.lock); | |
4537 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
4538 | if (sk->sk_state != BT_LISTEN) | |
4539 | continue; | |
4540 | ||
4541 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
4542 | lm1 |= HCI_LM_ACCEPT; |
4543 | if (l2cap_pi(sk)->role_switch) | |
4544 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 4545 | exact++; |
2af6b9d5 MH |
4546 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
4547 | lm2 |= HCI_LM_ACCEPT; | |
4548 | if (l2cap_pi(sk)->role_switch) | |
4549 | lm2 |= HCI_LM_MASTER; | |
4550 | } | |
1da177e4 LT |
4551 | } |
4552 | read_unlock(&l2cap_sk_list.lock); | |
4553 | ||
4554 | return exact ? lm1 : lm2; | |
4555 | } | |
4556 | ||
4557 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
4558 | { | |
0139418c MH |
4559 | struct l2cap_conn *conn; |
4560 | ||
1da177e4 LT |
4561 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
4562 | ||
4563 | if (hcon->type != ACL_LINK) | |
963cf687 | 4564 | return -EINVAL; |
1da177e4 LT |
4565 | |
4566 | if (!status) { | |
1da177e4 LT |
4567 | conn = l2cap_conn_add(hcon, status); |
4568 | if (conn) | |
4569 | l2cap_conn_ready(conn); | |
0139418c | 4570 | } else |
1da177e4 LT |
4571 | l2cap_conn_del(hcon, bt_err(status)); |
4572 | ||
4573 | return 0; | |
4574 | } | |
4575 | ||
2950f21a MH |
4576 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
4577 | { | |
4578 | struct l2cap_conn *conn = hcon->l2cap_data; | |
4579 | ||
4580 | BT_DBG("hcon %p", hcon); | |
4581 | ||
4582 | if (hcon->type != ACL_LINK || !conn) | |
4583 | return 0x13; | |
4584 | ||
4585 | return conn->disc_reason; | |
4586 | } | |
4587 | ||
4588 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) | |
1da177e4 LT |
4589 | { |
4590 | BT_DBG("hcon %p reason %d", hcon, reason); | |
4591 | ||
4592 | if (hcon->type != ACL_LINK) | |
963cf687 | 4593 | return -EINVAL; |
1da177e4 LT |
4594 | |
4595 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 4596 | |
1da177e4 LT |
4597 | return 0; |
4598 | } | |
4599 | ||
f62e4323 MH |
4600 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
4601 | { | |
bd3c9e25 | 4602 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) |
255c7601 MH |
4603 | return; |
4604 | ||
f62e4323 MH |
4605 | if (encrypt == 0x00) { |
4606 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { | |
4607 | l2cap_sock_clear_timer(sk); | |
4608 | l2cap_sock_set_timer(sk, HZ * 5); | |
4609 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
4610 | __l2cap_sock_close(sk, ECONNREFUSED); | |
4611 | } else { | |
4612 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) | |
4613 | l2cap_sock_clear_timer(sk); | |
4614 | } | |
4615 | } | |
4616 | ||
8c1b2355 | 4617 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
4618 | { |
4619 | struct l2cap_chan_list *l; | |
0139418c | 4620 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 4621 | struct sock *sk; |
1da177e4 | 4622 | |
0139418c | 4623 | if (!conn) |
1da177e4 | 4624 | return 0; |
0139418c | 4625 | |
1da177e4 LT |
4626 | l = &conn->chan_list; |
4627 | ||
4628 | BT_DBG("conn %p", conn); | |
4629 | ||
4630 | read_lock(&l->lock); | |
4631 | ||
4632 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
4633 | bh_lock_sock(sk); | |
4634 | ||
6a8d3010 MH |
4635 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
4636 | bh_unlock_sock(sk); | |
4637 | continue; | |
4638 | } | |
4639 | ||
f62e4323 | 4640 | if (!status && (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 4641 | sk->sk_state == BT_CONFIG)) { |
f62e4323 | 4642 | l2cap_check_encryption(sk, encrypt); |
9719f8af MH |
4643 | bh_unlock_sock(sk); |
4644 | continue; | |
4645 | } | |
4646 | ||
b1235d79 MH |
4647 | if (sk->sk_state == BT_CONNECT) { |
4648 | if (!status) { | |
4649 | struct l2cap_conn_req req; | |
4650 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
4651 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 4652 | |
b1235d79 | 4653 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
e501d055 | 4654 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 | 4655 | |
b1235d79 MH |
4656 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4657 | L2CAP_CONN_REQ, sizeof(req), &req); | |
4658 | } else { | |
4659 | l2cap_sock_clear_timer(sk); | |
4660 | l2cap_sock_set_timer(sk, HZ / 10); | |
4661 | } | |
4662 | } else if (sk->sk_state == BT_CONNECT2) { | |
4663 | struct l2cap_conn_rsp rsp; | |
4664 | __u16 result; | |
1da177e4 | 4665 | |
b1235d79 MH |
4666 | if (!status) { |
4667 | sk->sk_state = BT_CONFIG; | |
4668 | result = L2CAP_CR_SUCCESS; | |
4669 | } else { | |
4670 | sk->sk_state = BT_DISCONN; | |
4671 | l2cap_sock_set_timer(sk, HZ / 10); | |
4672 | result = L2CAP_CR_SEC_BLOCK; | |
4673 | } | |
4674 | ||
4675 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
4676 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
4677 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 4678 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
4679 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4680 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4681 | } | |
1da177e4 LT |
4682 | |
4683 | bh_unlock_sock(sk); | |
4684 | } | |
4685 | ||
4686 | read_unlock(&l->lock); | |
b1235d79 | 4687 | |
1da177e4 LT |
4688 | return 0; |
4689 | } | |
4690 | ||
4691 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
4692 | { | |
4693 | struct l2cap_conn *conn = hcon->l2cap_data; | |
4694 | ||
4695 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
4696 | goto drop; | |
4697 | ||
4698 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
4699 | ||
4700 | if (flags & ACL_START) { | |
4701 | struct l2cap_hdr *hdr; | |
89794813 AE |
4702 | struct sock *sk; |
4703 | u16 cid; | |
1da177e4 LT |
4704 | int len; |
4705 | ||
4706 | if (conn->rx_len) { | |
4707 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
4708 | kfree_skb(conn->rx_skb); | |
4709 | conn->rx_skb = NULL; | |
4710 | conn->rx_len = 0; | |
4711 | l2cap_conn_unreliable(conn, ECOMM); | |
4712 | } | |
4713 | ||
aae7fe22 AE |
4714 | /* Start fragment always begin with Basic L2CAP header */ |
4715 | if (skb->len < L2CAP_HDR_SIZE) { | |
1da177e4 LT |
4716 | BT_ERR("Frame is too short (len %d)", skb->len); |
4717 | l2cap_conn_unreliable(conn, ECOMM); | |
4718 | goto drop; | |
4719 | } | |
4720 | ||
4721 | hdr = (struct l2cap_hdr *) skb->data; | |
4722 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
89794813 | 4723 | cid = __le16_to_cpu(hdr->cid); |
1da177e4 LT |
4724 | |
4725 | if (len == skb->len) { | |
4726 | /* Complete frame received */ | |
4727 | l2cap_recv_frame(conn, skb); | |
4728 | return 0; | |
4729 | } | |
4730 | ||
4731 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
4732 | ||
4733 | if (skb->len > len) { | |
4734 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
4735 | skb->len, len); | |
4736 | l2cap_conn_unreliable(conn, ECOMM); | |
4737 | goto drop; | |
4738 | } | |
4739 | ||
89794813 AE |
4740 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); |
4741 | ||
4742 | if (sk && l2cap_pi(sk)->imtu < len - L2CAP_HDR_SIZE) { | |
4743 | BT_ERR("Frame exceeding recv MTU (len %d, MTU %d)", | |
4744 | len, l2cap_pi(sk)->imtu); | |
4745 | bh_unlock_sock(sk); | |
4746 | l2cap_conn_unreliable(conn, ECOMM); | |
4747 | goto drop; | |
4748 | } | |
4749 | ||
4750 | if (sk) | |
4751 | bh_unlock_sock(sk); | |
4752 | ||
1da177e4 | 4753 | /* Allocate skb for the complete frame (with header) */ |
af05b30b GP |
4754 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
4755 | if (!conn->rx_skb) | |
1da177e4 LT |
4756 | goto drop; |
4757 | ||
d626f62b | 4758 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 4759 | skb->len); |
1da177e4 LT |
4760 | conn->rx_len = len - skb->len; |
4761 | } else { | |
4762 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
4763 | ||
4764 | if (!conn->rx_len) { | |
4765 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
4766 | l2cap_conn_unreliable(conn, ECOMM); | |
4767 | goto drop; | |
4768 | } | |
4769 | ||
4770 | if (skb->len > conn->rx_len) { | |
4771 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
4772 | skb->len, conn->rx_len); | |
4773 | kfree_skb(conn->rx_skb); | |
4774 | conn->rx_skb = NULL; | |
4775 | conn->rx_len = 0; | |
4776 | l2cap_conn_unreliable(conn, ECOMM); | |
4777 | goto drop; | |
4778 | } | |
4779 | ||
d626f62b | 4780 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 4781 | skb->len); |
1da177e4 LT |
4782 | conn->rx_len -= skb->len; |
4783 | ||
4784 | if (!conn->rx_len) { | |
4785 | /* Complete frame received */ | |
4786 | l2cap_recv_frame(conn, conn->rx_skb); | |
4787 | conn->rx_skb = NULL; | |
4788 | } | |
4789 | } | |
4790 | ||
4791 | drop: | |
4792 | kfree_skb(skb); | |
4793 | return 0; | |
4794 | } | |
4795 | ||
aef7d97c | 4796 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
4797 | { |
4798 | struct sock *sk; | |
4799 | struct hlist_node *node; | |
1da177e4 LT |
4800 | |
4801 | read_lock_bh(&l2cap_sk_list.lock); | |
4802 | ||
be9d1227 MH |
4803 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
4804 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
101545f6 | 4805 | |
aef7d97c MH |
4806 | seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
4807 | batostr(&bt_sk(sk)->src), | |
4808 | batostr(&bt_sk(sk)->dst), | |
4809 | sk->sk_state, __le16_to_cpu(pi->psm), | |
4810 | pi->scid, pi->dcid, | |
4811 | pi->imtu, pi->omtu, pi->sec_level); | |
be9d1227 | 4812 | } |
1da177e4 | 4813 | |
1da177e4 | 4814 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 4815 | |
aef7d97c | 4816 | return 0; |
1da177e4 LT |
4817 | } |
4818 | ||
aef7d97c MH |
4819 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
4820 | { | |
4821 | return single_open(file, l2cap_debugfs_show, inode->i_private); | |
4822 | } | |
4823 | ||
4824 | static const struct file_operations l2cap_debugfs_fops = { | |
4825 | .open = l2cap_debugfs_open, | |
4826 | .read = seq_read, | |
4827 | .llseek = seq_lseek, | |
4828 | .release = single_release, | |
4829 | }; | |
4830 | ||
4831 | static struct dentry *l2cap_debugfs; | |
1da177e4 | 4832 | |
90ddc4f0 | 4833 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
4834 | .family = PF_BLUETOOTH, |
4835 | .owner = THIS_MODULE, | |
4836 | .release = l2cap_sock_release, | |
4837 | .bind = l2cap_sock_bind, | |
4838 | .connect = l2cap_sock_connect, | |
4839 | .listen = l2cap_sock_listen, | |
4840 | .accept = l2cap_sock_accept, | |
4841 | .getname = l2cap_sock_getname, | |
4842 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 4843 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 4844 | .poll = bt_sock_poll, |
3241ad82 | 4845 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
4846 | .mmap = sock_no_mmap, |
4847 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
4848 | .shutdown = l2cap_sock_shutdown, |
4849 | .setsockopt = l2cap_sock_setsockopt, | |
4850 | .getsockopt = l2cap_sock_getsockopt | |
4851 | }; | |
4852 | ||
ec1b4cf7 | 4853 | static const struct net_proto_family l2cap_sock_family_ops = { |
1da177e4 LT |
4854 | .family = PF_BLUETOOTH, |
4855 | .owner = THIS_MODULE, | |
4856 | .create = l2cap_sock_create, | |
4857 | }; | |
4858 | ||
4859 | static struct hci_proto l2cap_hci_proto = { | |
4860 | .name = "L2CAP", | |
4861 | .id = HCI_PROTO_L2CAP, | |
4862 | .connect_ind = l2cap_connect_ind, | |
4863 | .connect_cfm = l2cap_connect_cfm, | |
4864 | .disconn_ind = l2cap_disconn_ind, | |
2950f21a | 4865 | .disconn_cfm = l2cap_disconn_cfm, |
8c1b2355 | 4866 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
4867 | .recv_acldata = l2cap_recv_acldata |
4868 | }; | |
4869 | ||
4870 | static int __init l2cap_init(void) | |
4871 | { | |
4872 | int err; | |
be9d1227 | 4873 | |
1da177e4 LT |
4874 | err = proto_register(&l2cap_proto, 0); |
4875 | if (err < 0) | |
4876 | return err; | |
4877 | ||
1890d36b | 4878 | _busy_wq = create_singlethread_workqueue("l2cap"); |
b78d7b4f AL |
4879 | if (!_busy_wq) { |
4880 | proto_unregister(&l2cap_proto); | |
4881 | return -ENOMEM; | |
4882 | } | |
1890d36b | 4883 | |
1da177e4 LT |
4884 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
4885 | if (err < 0) { | |
4886 | BT_ERR("L2CAP socket registration failed"); | |
4887 | goto error; | |
4888 | } | |
4889 | ||
4890 | err = hci_register_proto(&l2cap_hci_proto); | |
4891 | if (err < 0) { | |
4892 | BT_ERR("L2CAP protocol registration failed"); | |
4893 | bt_sock_unregister(BTPROTO_L2CAP); | |
4894 | goto error; | |
4895 | } | |
4896 | ||
aef7d97c MH |
4897 | if (bt_debugfs) { |
4898 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, | |
4899 | bt_debugfs, NULL, &l2cap_debugfs_fops); | |
4900 | if (!l2cap_debugfs) | |
4901 | BT_ERR("Failed to create L2CAP debug file"); | |
4902 | } | |
1da177e4 LT |
4903 | |
4904 | BT_INFO("L2CAP ver %s", VERSION); | |
4905 | BT_INFO("L2CAP socket layer initialized"); | |
4906 | ||
4907 | return 0; | |
4908 | ||
4909 | error: | |
b78d7b4f | 4910 | destroy_workqueue(_busy_wq); |
1da177e4 LT |
4911 | proto_unregister(&l2cap_proto); |
4912 | return err; | |
4913 | } | |
4914 | ||
4915 | static void __exit l2cap_exit(void) | |
4916 | { | |
aef7d97c | 4917 | debugfs_remove(l2cap_debugfs); |
1da177e4 | 4918 | |
1890d36b GP |
4919 | flush_workqueue(_busy_wq); |
4920 | destroy_workqueue(_busy_wq); | |
4921 | ||
1da177e4 LT |
4922 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
4923 | BT_ERR("L2CAP socket unregistration failed"); | |
4924 | ||
4925 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
4926 | BT_ERR("L2CAP protocol unregistration failed"); | |
4927 | ||
4928 | proto_unregister(&l2cap_proto); | |
4929 | } | |
4930 | ||
4931 | void l2cap_load(void) | |
4932 | { | |
4933 | /* Dummy function to trigger automatic L2CAP module loading by | |
4934 | * other modules that use L2CAP sockets but don't use any other | |
4935 | * symbols from it. */ | |
1da177e4 LT |
4936 | } |
4937 | EXPORT_SYMBOL(l2cap_load); | |
4938 | ||
4939 | module_init(l2cap_init); | |
4940 | module_exit(l2cap_exit); | |
4941 | ||
d1c4a17d GP |
4942 | module_param(disable_ertm, bool, 0644); |
4943 | MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode"); | |
44dd46de | 4944 | |
63fbd24e | 4945 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
4946 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
4947 | MODULE_VERSION(VERSION); | |
4948 | MODULE_LICENSE("GPL"); | |
4949 | MODULE_ALIAS("bt-proto-0"); |