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Commit | Line | Data |
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8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth L2CAP core and sockets. */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
4fc268d2 | 30 | #include <linux/capability.h> |
1da177e4 LT |
31 | #include <linux/errno.h> |
32 | #include <linux/kernel.h> | |
1da177e4 LT |
33 | #include <linux/sched.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/fcntl.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/socket.h> | |
40 | #include <linux/skbuff.h> | |
1da177e4 | 41 | #include <linux/list.h> |
be9d1227 | 42 | #include <linux/device.h> |
af05b30b | 43 | #include <linux/uaccess.h> |
fcc203c3 | 44 | #include <linux/crc16.h> |
1da177e4 LT |
45 | #include <net/sock.h> |
46 | ||
47 | #include <asm/system.h> | |
1da177e4 LT |
48 | #include <asm/unaligned.h> |
49 | ||
50 | #include <net/bluetooth/bluetooth.h> | |
51 | #include <net/bluetooth/hci_core.h> | |
52 | #include <net/bluetooth/l2cap.h> | |
53 | ||
44dd46de MH |
54 | #define VERSION "2.14" |
55 | ||
56 | static int enable_ertm = 0; | |
f0709e03 | 57 | |
47ec1dcd | 58 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
e1027a7c | 59 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
1da177e4 | 60 | |
90ddc4f0 | 61 | static const struct proto_ops l2cap_sock_ops; |
1da177e4 LT |
62 | |
63 | static struct bt_sock_list l2cap_sk_list = { | |
d5fb2962 | 64 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
1da177e4 LT |
65 | }; |
66 | ||
1da177e4 LT |
67 | static void __l2cap_sock_close(struct sock *sk, int reason); |
68 | static void l2cap_sock_close(struct sock *sk); | |
69 | static void l2cap_sock_kill(struct sock *sk); | |
70 | ||
71 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
72 | u8 code, u8 ident, u16 dlen, void *data); | |
73 | ||
74 | /* ---- L2CAP timers ---- */ | |
75 | static void l2cap_sock_timeout(unsigned long arg) | |
76 | { | |
77 | struct sock *sk = (struct sock *) arg; | |
b1235d79 | 78 | int reason; |
1da177e4 LT |
79 | |
80 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
81 | ||
82 | bh_lock_sock(sk); | |
b1235d79 | 83 | |
f62e4323 MH |
84 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
85 | reason = ECONNREFUSED; | |
86 | else if (sk->sk_state == BT_CONNECT && | |
2af6b9d5 | 87 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
b1235d79 MH |
88 | reason = ECONNREFUSED; |
89 | else | |
90 | reason = ETIMEDOUT; | |
91 | ||
92 | __l2cap_sock_close(sk, reason); | |
93 | ||
1da177e4 LT |
94 | bh_unlock_sock(sk); |
95 | ||
96 | l2cap_sock_kill(sk); | |
97 | sock_put(sk); | |
98 | } | |
99 | ||
100 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
101 | { | |
102 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
103 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
104 | } | |
105 | ||
106 | static void l2cap_sock_clear_timer(struct sock *sk) | |
107 | { | |
108 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
109 | sk_stop_timer(sk, &sk->sk_timer); | |
110 | } | |
111 | ||
0139418c MH |
112 | /* ---- L2CAP channels ---- */ |
113 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
114 | { | |
115 | struct sock *s; | |
116 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
117 | if (l2cap_pi(s)->dcid == cid) | |
118 | break; | |
119 | } | |
120 | return s; | |
121 | } | |
122 | ||
123 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
124 | { | |
125 | struct sock *s; | |
126 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
127 | if (l2cap_pi(s)->scid == cid) | |
128 | break; | |
129 | } | |
130 | return s; | |
131 | } | |
132 | ||
133 | /* Find channel with given SCID. | |
134 | * Returns locked socket */ | |
135 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
136 | { | |
137 | struct sock *s; | |
138 | read_lock(&l->lock); | |
139 | s = __l2cap_get_chan_by_scid(l, cid); | |
af05b30b GP |
140 | if (s) |
141 | bh_lock_sock(s); | |
0139418c MH |
142 | read_unlock(&l->lock); |
143 | return s; | |
144 | } | |
145 | ||
146 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
147 | { | |
148 | struct sock *s; | |
149 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
150 | if (l2cap_pi(s)->ident == ident) | |
151 | break; | |
152 | } | |
153 | return s; | |
154 | } | |
155 | ||
156 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
157 | { | |
158 | struct sock *s; | |
159 | read_lock(&l->lock); | |
160 | s = __l2cap_get_chan_by_ident(l, ident); | |
af05b30b GP |
161 | if (s) |
162 | bh_lock_sock(s); | |
0139418c MH |
163 | read_unlock(&l->lock); |
164 | return s; | |
165 | } | |
166 | ||
167 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
168 | { | |
8db4dc46 | 169 | u16 cid = L2CAP_CID_DYN_START; |
0139418c | 170 | |
8db4dc46 | 171 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
af05b30b | 172 | if (!__l2cap_get_chan_by_scid(l, cid)) |
0139418c MH |
173 | return cid; |
174 | } | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
180 | { | |
181 | sock_hold(sk); | |
182 | ||
183 | if (l->head) | |
184 | l2cap_pi(l->head)->prev_c = sk; | |
185 | ||
186 | l2cap_pi(sk)->next_c = l->head; | |
187 | l2cap_pi(sk)->prev_c = NULL; | |
188 | l->head = sk; | |
189 | } | |
190 | ||
191 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
192 | { | |
193 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
194 | ||
fd1278d7 | 195 | write_lock_bh(&l->lock); |
0139418c MH |
196 | if (sk == l->head) |
197 | l->head = next; | |
198 | ||
199 | if (next) | |
200 | l2cap_pi(next)->prev_c = prev; | |
201 | if (prev) | |
202 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 203 | write_unlock_bh(&l->lock); |
0139418c MH |
204 | |
205 | __sock_put(sk); | |
206 | } | |
207 | ||
208 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
209 | { | |
210 | struct l2cap_chan_list *l = &conn->chan_list; | |
211 | ||
af05b30b GP |
212 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
213 | l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
0139418c | 214 | |
2950f21a MH |
215 | conn->disc_reason = 0x13; |
216 | ||
0139418c MH |
217 | l2cap_pi(sk)->conn = conn; |
218 | ||
219 | if (sk->sk_type == SOCK_SEQPACKET) { | |
220 | /* Alloc CID for connection-oriented socket */ | |
221 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
222 | } else if (sk->sk_type == SOCK_DGRAM) { | |
223 | /* Connectionless socket */ | |
8db4dc46 GP |
224 | l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS; |
225 | l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS; | |
0139418c MH |
226 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
227 | } else { | |
228 | /* Raw socket can send/recv signalling messages only */ | |
8db4dc46 GP |
229 | l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING; |
230 | l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING; | |
0139418c MH |
231 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
232 | } | |
233 | ||
234 | __l2cap_chan_link(l, sk); | |
235 | ||
236 | if (parent) | |
237 | bt_accept_enqueue(parent, sk); | |
238 | } | |
239 | ||
8e87d142 | 240 | /* Delete channel. |
0139418c MH |
241 | * Must be called on the locked socket. */ |
242 | static void l2cap_chan_del(struct sock *sk, int err) | |
243 | { | |
244 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
245 | struct sock *parent = bt_sk(sk)->parent; | |
246 | ||
247 | l2cap_sock_clear_timer(sk); | |
248 | ||
249 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
250 | ||
8e87d142 | 251 | if (conn) { |
0139418c MH |
252 | /* Unlink from channel list */ |
253 | l2cap_chan_unlink(&conn->chan_list, sk); | |
254 | l2cap_pi(sk)->conn = NULL; | |
255 | hci_conn_put(conn->hcon); | |
256 | } | |
257 | ||
b1235d79 | 258 | sk->sk_state = BT_CLOSED; |
0139418c MH |
259 | sock_set_flag(sk, SOCK_ZAPPED); |
260 | ||
261 | if (err) | |
262 | sk->sk_err = err; | |
263 | ||
264 | if (parent) { | |
265 | bt_accept_unlink(sk); | |
266 | parent->sk_data_ready(parent, 0); | |
267 | } else | |
268 | sk->sk_state_change(sk); | |
269 | } | |
270 | ||
79d554a6 | 271 | /* Service level security */ |
2af6b9d5 | 272 | static inline int l2cap_check_security(struct sock *sk) |
79d554a6 MH |
273 | { |
274 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
0684e5f9 MH |
275 | __u8 auth_type; |
276 | ||
00ae4af9 MH |
277 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
278 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
279 | auth_type = HCI_AT_NO_BONDING_MITM; | |
280 | else | |
af05b30b | 281 | auth_type = HCI_AT_NO_BONDING; |
00ae4af9 MH |
282 | |
283 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
284 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
285 | } else { | |
286 | switch (l2cap_pi(sk)->sec_level) { | |
287 | case BT_SECURITY_HIGH: | |
288 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
289 | break; | |
290 | case BT_SECURITY_MEDIUM: | |
291 | auth_type = HCI_AT_GENERAL_BONDING; | |
292 | break; | |
293 | default: | |
294 | auth_type = HCI_AT_NO_BONDING; | |
295 | break; | |
296 | } | |
0684e5f9 | 297 | } |
79d554a6 | 298 | |
0684e5f9 MH |
299 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
300 | auth_type); | |
79d554a6 MH |
301 | } |
302 | ||
4e8402a3 MH |
303 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
304 | { | |
305 | u8 id; | |
306 | ||
307 | /* Get next available identificator. | |
308 | * 1 - 128 are used by kernel. | |
309 | * 129 - 199 are reserved. | |
310 | * 200 - 254 are used by utilities like l2ping, etc. | |
311 | */ | |
312 | ||
313 | spin_lock_bh(&conn->lock); | |
314 | ||
315 | if (++conn->tx_ident > 128) | |
316 | conn->tx_ident = 1; | |
317 | ||
318 | id = conn->tx_ident; | |
319 | ||
320 | spin_unlock_bh(&conn->lock); | |
321 | ||
322 | return id; | |
323 | } | |
324 | ||
325 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) | |
326 | { | |
327 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
328 | ||
329 | BT_DBG("code 0x%2.2x", code); | |
330 | ||
331 | if (!skb) | |
332 | return -ENOMEM; | |
333 | ||
334 | return hci_send_acl(conn->hcon, skb, 0); | |
335 | } | |
336 | ||
1c2acffb GP |
337 | static inline int l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control) |
338 | { | |
339 | struct sk_buff *skb; | |
340 | struct l2cap_hdr *lh; | |
341 | struct l2cap_conn *conn = pi->conn; | |
fcc203c3 GP |
342 | int count, hlen = L2CAP_HDR_SIZE + 2; |
343 | ||
344 | if (pi->fcs == L2CAP_FCS_CRC16) | |
345 | hlen += 2; | |
1c2acffb GP |
346 | |
347 | BT_DBG("pi %p, control 0x%2.2x", pi, control); | |
348 | ||
fcc203c3 | 349 | count = min_t(unsigned int, conn->mtu, hlen); |
1c2acffb GP |
350 | control |= L2CAP_CTRL_FRAME_TYPE; |
351 | ||
352 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
353 | if (!skb) | |
354 | return -ENOMEM; | |
355 | ||
356 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
fcc203c3 | 357 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
1c2acffb GP |
358 | lh->cid = cpu_to_le16(pi->dcid); |
359 | put_unaligned_le16(control, skb_put(skb, 2)); | |
360 | ||
fcc203c3 GP |
361 | if (pi->fcs == L2CAP_FCS_CRC16) { |
362 | u16 fcs = crc16(0, (u8 *)lh, count - 2); | |
363 | put_unaligned_le16(fcs, skb_put(skb, 2)); | |
364 | } | |
365 | ||
1c2acffb GP |
366 | return hci_send_acl(pi->conn->hcon, skb, 0); |
367 | } | |
368 | ||
7e743090 GP |
369 | static inline int l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control) |
370 | { | |
371 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) | |
372 | control |= L2CAP_SUPER_RCV_NOT_READY; | |
373 | else | |
374 | control |= L2CAP_SUPER_RCV_READY; | |
375 | ||
376 | return l2cap_send_sframe(pi, control); | |
377 | } | |
378 | ||
79d554a6 MH |
379 | static void l2cap_do_start(struct sock *sk) |
380 | { | |
381 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
382 | ||
383 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
984947dc MH |
384 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
385 | return; | |
386 | ||
2af6b9d5 | 387 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
388 | struct l2cap_conn_req req; |
389 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
390 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 391 | |
b1235d79 | 392 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 393 | |
b1235d79 | 394 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 395 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 396 | } |
79d554a6 MH |
397 | } else { |
398 | struct l2cap_info_req req; | |
399 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
400 | ||
401 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
402 | conn->info_ident = l2cap_get_ident(conn); | |
403 | ||
404 | mod_timer(&conn->info_timer, jiffies + | |
405 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
406 | ||
407 | l2cap_send_cmd(conn, conn->info_ident, | |
408 | L2CAP_INFO_REQ, sizeof(req), &req); | |
409 | } | |
410 | } | |
411 | ||
22121fc9 GP |
412 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk) |
413 | { | |
414 | struct l2cap_disconn_req req; | |
415 | ||
416 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
417 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
418 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
419 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
420 | } | |
421 | ||
1da177e4 | 422 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
423 | static void l2cap_conn_start(struct l2cap_conn *conn) |
424 | { | |
425 | struct l2cap_chan_list *l = &conn->chan_list; | |
426 | struct sock *sk; | |
427 | ||
428 | BT_DBG("conn %p", conn); | |
429 | ||
430 | read_lock(&l->lock); | |
431 | ||
432 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
433 | bh_lock_sock(sk); | |
434 | ||
435 | if (sk->sk_type != SOCK_SEQPACKET) { | |
79d554a6 MH |
436 | bh_unlock_sock(sk); |
437 | continue; | |
438 | } | |
439 | ||
440 | if (sk->sk_state == BT_CONNECT) { | |
2af6b9d5 | 441 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
442 | struct l2cap_conn_req req; |
443 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
444 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 445 | |
b1235d79 | 446 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 447 | |
b1235d79 | 448 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4e8402a3 | 449 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 450 | } |
79d554a6 MH |
451 | } else if (sk->sk_state == BT_CONNECT2) { |
452 | struct l2cap_conn_rsp rsp; | |
453 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
454 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
455 | ||
2af6b9d5 | 456 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
457 | if (bt_sk(sk)->defer_setup) { |
458 | struct sock *parent = bt_sk(sk)->parent; | |
459 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
460 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
461 | parent->sk_data_ready(parent, 0); | |
462 | ||
463 | } else { | |
464 | sk->sk_state = BT_CONFIG; | |
465 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
466 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
467 | } | |
79d554a6 MH |
468 | } else { |
469 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
470 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
471 | } | |
472 | ||
473 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
474 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4e8402a3 MH |
475 | } |
476 | ||
477 | bh_unlock_sock(sk); | |
478 | } | |
479 | ||
480 | read_unlock(&l->lock); | |
481 | } | |
482 | ||
483 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
484 | { | |
79d554a6 MH |
485 | struct l2cap_chan_list *l = &conn->chan_list; |
486 | struct sock *sk; | |
4e8402a3 | 487 | |
79d554a6 | 488 | BT_DBG("conn %p", conn); |
4e8402a3 | 489 | |
79d554a6 | 490 | read_lock(&l->lock); |
4e8402a3 | 491 | |
79d554a6 MH |
492 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
493 | bh_lock_sock(sk); | |
4e8402a3 | 494 | |
79d554a6 MH |
495 | if (sk->sk_type != SOCK_SEQPACKET) { |
496 | l2cap_sock_clear_timer(sk); | |
497 | sk->sk_state = BT_CONNECTED; | |
498 | sk->sk_state_change(sk); | |
499 | } else if (sk->sk_state == BT_CONNECT) | |
500 | l2cap_do_start(sk); | |
4e8402a3 | 501 | |
79d554a6 | 502 | bh_unlock_sock(sk); |
4e8402a3 | 503 | } |
79d554a6 MH |
504 | |
505 | read_unlock(&l->lock); | |
4e8402a3 MH |
506 | } |
507 | ||
508 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
509 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
510 | { | |
511 | struct l2cap_chan_list *l = &conn->chan_list; | |
512 | struct sock *sk; | |
513 | ||
514 | BT_DBG("conn %p", conn); | |
515 | ||
516 | read_lock(&l->lock); | |
517 | ||
518 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 519 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
520 | sk->sk_err = err; |
521 | } | |
522 | ||
523 | read_unlock(&l->lock); | |
524 | } | |
525 | ||
526 | static void l2cap_info_timeout(unsigned long arg) | |
527 | { | |
528 | struct l2cap_conn *conn = (void *) arg; | |
529 | ||
984947dc | 530 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 531 | conn->info_ident = 0; |
984947dc | 532 | |
4e8402a3 MH |
533 | l2cap_conn_start(conn); |
534 | } | |
535 | ||
1da177e4 LT |
536 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
537 | { | |
0139418c | 538 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 539 | |
0139418c | 540 | if (conn || status) |
1da177e4 LT |
541 | return conn; |
542 | ||
0139418c MH |
543 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
544 | if (!conn) | |
1da177e4 | 545 | return NULL; |
1da177e4 LT |
546 | |
547 | hcon->l2cap_data = conn; | |
548 | conn->hcon = hcon; | |
549 | ||
0139418c MH |
550 | BT_DBG("hcon %p conn %p", hcon, conn); |
551 | ||
1da177e4 LT |
552 | conn->mtu = hcon->hdev->acl_mtu; |
553 | conn->src = &hcon->hdev->bdaddr; | |
554 | conn->dst = &hcon->dst; | |
555 | ||
4e8402a3 MH |
556 | conn->feat_mask = 0; |
557 | ||
1da177e4 LT |
558 | spin_lock_init(&conn->lock); |
559 | rwlock_init(&conn->chan_list.lock); | |
560 | ||
45054dc1 DY |
561 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
562 | (unsigned long) conn); | |
563 | ||
2950f21a MH |
564 | conn->disc_reason = 0x13; |
565 | ||
1da177e4 LT |
566 | return conn; |
567 | } | |
568 | ||
0139418c | 569 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 570 | { |
0139418c | 571 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
572 | struct sock *sk; |
573 | ||
0139418c MH |
574 | if (!conn) |
575 | return; | |
1da177e4 LT |
576 | |
577 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
578 | ||
7585b97a | 579 | kfree_skb(conn->rx_skb); |
1da177e4 LT |
580 | |
581 | /* Kill channels */ | |
582 | while ((sk = conn->chan_list.head)) { | |
583 | bh_lock_sock(sk); | |
584 | l2cap_chan_del(sk, err); | |
585 | bh_unlock_sock(sk); | |
586 | l2cap_sock_kill(sk); | |
587 | } | |
588 | ||
8e8440f5 DY |
589 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
590 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 591 | |
1da177e4 LT |
592 | hcon->l2cap_data = NULL; |
593 | kfree(conn); | |
1da177e4 LT |
594 | } |
595 | ||
596 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
597 | { | |
598 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 599 | write_lock_bh(&l->lock); |
1da177e4 | 600 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 601 | write_unlock_bh(&l->lock); |
1da177e4 LT |
602 | } |
603 | ||
1da177e4 | 604 | /* ---- Socket interface ---- */ |
8e036fc3 | 605 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
606 | { |
607 | struct sock *sk; | |
608 | struct hlist_node *node; | |
609 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
610 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
611 | goto found; | |
612 | sk = NULL; | |
613 | found: | |
614 | return sk; | |
615 | } | |
616 | ||
617 | /* Find socket with psm and source bdaddr. | |
618 | * Returns closest match. | |
619 | */ | |
8e036fc3 | 620 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
621 | { |
622 | struct sock *sk = NULL, *sk1 = NULL; | |
623 | struct hlist_node *node; | |
624 | ||
625 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
626 | if (state && sk->sk_state != state) | |
627 | continue; | |
628 | ||
629 | if (l2cap_pi(sk)->psm == psm) { | |
630 | /* Exact match. */ | |
631 | if (!bacmp(&bt_sk(sk)->src, src)) | |
632 | break; | |
633 | ||
634 | /* Closest match */ | |
635 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
636 | sk1 = sk; | |
637 | } | |
638 | } | |
639 | return node ? sk : sk1; | |
640 | } | |
641 | ||
642 | /* Find socket with given address (psm, src). | |
643 | * Returns locked socket */ | |
8e036fc3 | 644 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
645 | { |
646 | struct sock *s; | |
647 | read_lock(&l2cap_sk_list.lock); | |
648 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
af05b30b GP |
649 | if (s) |
650 | bh_lock_sock(s); | |
1da177e4 LT |
651 | read_unlock(&l2cap_sk_list.lock); |
652 | return s; | |
653 | } | |
654 | ||
655 | static void l2cap_sock_destruct(struct sock *sk) | |
656 | { | |
657 | BT_DBG("sk %p", sk); | |
658 | ||
659 | skb_queue_purge(&sk->sk_receive_queue); | |
660 | skb_queue_purge(&sk->sk_write_queue); | |
661 | } | |
662 | ||
663 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
664 | { | |
665 | struct sock *sk; | |
666 | ||
667 | BT_DBG("parent %p", parent); | |
668 | ||
669 | /* Close not yet accepted channels */ | |
670 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
671 | l2cap_sock_close(sk); | |
672 | ||
b1235d79 | 673 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
674 | sock_set_flag(parent, SOCK_ZAPPED); |
675 | } | |
676 | ||
677 | /* Kill socket (only if zapped and orphan) | |
678 | * Must be called on unlocked socket. | |
679 | */ | |
680 | static void l2cap_sock_kill(struct sock *sk) | |
681 | { | |
682 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
683 | return; | |
684 | ||
685 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
686 | ||
687 | /* Kill poor orphan */ | |
688 | bt_sock_unlink(&l2cap_sk_list, sk); | |
689 | sock_set_flag(sk, SOCK_DEAD); | |
690 | sock_put(sk); | |
691 | } | |
692 | ||
693 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
694 | { | |
695 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
696 | ||
697 | switch (sk->sk_state) { | |
698 | case BT_LISTEN: | |
699 | l2cap_sock_cleanup_listen(sk); | |
700 | break; | |
701 | ||
702 | case BT_CONNECTED: | |
703 | case BT_CONFIG: | |
1da177e4 LT |
704 | if (sk->sk_type == SOCK_SEQPACKET) { |
705 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1da177e4 LT |
706 | |
707 | sk->sk_state = BT_DISCONN; | |
708 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
22121fc9 | 709 | l2cap_send_disconn_req(conn, sk); |
b1235d79 | 710 | } else |
1da177e4 | 711 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
712 | break; |
713 | ||
f66dc81f MH |
714 | case BT_CONNECT2: |
715 | if (sk->sk_type == SOCK_SEQPACKET) { | |
716 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
717 | struct l2cap_conn_rsp rsp; | |
718 | __u16 result; | |
719 | ||
720 | if (bt_sk(sk)->defer_setup) | |
721 | result = L2CAP_CR_SEC_BLOCK; | |
722 | else | |
723 | result = L2CAP_CR_BAD_PSM; | |
724 | ||
725 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
726 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
727 | rsp.result = cpu_to_le16(result); | |
728 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
729 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
730 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
731 | } else | |
732 | l2cap_chan_del(sk, reason); | |
733 | break; | |
734 | ||
1da177e4 LT |
735 | case BT_CONNECT: |
736 | case BT_DISCONN: | |
737 | l2cap_chan_del(sk, reason); | |
738 | break; | |
739 | ||
740 | default: | |
741 | sock_set_flag(sk, SOCK_ZAPPED); | |
742 | break; | |
743 | } | |
744 | } | |
745 | ||
746 | /* Must be called on unlocked socket. */ | |
747 | static void l2cap_sock_close(struct sock *sk) | |
748 | { | |
749 | l2cap_sock_clear_timer(sk); | |
750 | lock_sock(sk); | |
751 | __l2cap_sock_close(sk, ECONNRESET); | |
752 | release_sock(sk); | |
753 | l2cap_sock_kill(sk); | |
754 | } | |
755 | ||
756 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
757 | { | |
758 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
759 | ||
760 | BT_DBG("sk %p", sk); | |
761 | ||
762 | if (parent) { | |
763 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
764 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
765 | ||
1da177e4 LT |
766 | pi->imtu = l2cap_pi(parent)->imtu; |
767 | pi->omtu = l2cap_pi(parent)->omtu; | |
c6b03cf9 MH |
768 | pi->mode = l2cap_pi(parent)->mode; |
769 | pi->fcs = l2cap_pi(parent)->fcs; | |
2af6b9d5 MH |
770 | pi->sec_level = l2cap_pi(parent)->sec_level; |
771 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
772 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
773 | } else { |
774 | pi->imtu = L2CAP_DEFAULT_MTU; | |
775 | pi->omtu = 0; | |
c6b03cf9 MH |
776 | pi->mode = L2CAP_MODE_BASIC; |
777 | pi->fcs = L2CAP_FCS_CRC16; | |
2af6b9d5 MH |
778 | pi->sec_level = BT_SECURITY_LOW; |
779 | pi->role_switch = 0; | |
780 | pi->force_reliable = 0; | |
1da177e4 LT |
781 | } |
782 | ||
783 | /* Default config options */ | |
5dee9e7c | 784 | pi->conf_len = 0; |
1da177e4 | 785 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
45054dc1 DY |
786 | skb_queue_head_init(TX_QUEUE(sk)); |
787 | skb_queue_head_init(SREJ_QUEUE(sk)); | |
788 | INIT_LIST_HEAD(SREJ_LIST(sk)); | |
1da177e4 LT |
789 | } |
790 | ||
791 | static struct proto l2cap_proto = { | |
792 | .name = "L2CAP", | |
793 | .owner = THIS_MODULE, | |
794 | .obj_size = sizeof(struct l2cap_pinfo) | |
795 | }; | |
796 | ||
1b8d7ae4 | 797 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
798 | { |
799 | struct sock *sk; | |
800 | ||
6257ff21 | 801 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
802 | if (!sk) |
803 | return NULL; | |
804 | ||
805 | sock_init_data(sock, sk); | |
806 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
807 | ||
808 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 809 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
810 | |
811 | sock_reset_flag(sk, SOCK_ZAPPED); | |
812 | ||
813 | sk->sk_protocol = proto; | |
b1235d79 | 814 | sk->sk_state = BT_OPEN; |
1da177e4 | 815 | |
b1235d79 | 816 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
817 | |
818 | bt_sock_link(&l2cap_sk_list, sk); | |
819 | return sk; | |
820 | } | |
821 | ||
3f378b68 EP |
822 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, |
823 | int kern) | |
1da177e4 LT |
824 | { |
825 | struct sock *sk; | |
826 | ||
827 | BT_DBG("sock %p", sock); | |
828 | ||
829 | sock->state = SS_UNCONNECTED; | |
830 | ||
831 | if (sock->type != SOCK_SEQPACKET && | |
832 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
833 | return -ESOCKTNOSUPPORT; | |
834 | ||
c84b3268 | 835 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
1da177e4 LT |
836 | return -EPERM; |
837 | ||
838 | sock->ops = &l2cap_sock_ops; | |
839 | ||
1b8d7ae4 | 840 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
841 | if (!sk) |
842 | return -ENOMEM; | |
843 | ||
844 | l2cap_sock_init(sk, NULL); | |
845 | return 0; | |
846 | } | |
847 | ||
f29972de | 848 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
1da177e4 | 849 | { |
1da177e4 | 850 | struct sock *sk = sock->sk; |
f29972de MH |
851 | struct sockaddr_l2 la; |
852 | int len, err = 0; | |
1da177e4 | 853 | |
f29972de | 854 | BT_DBG("sk %p", sk); |
1da177e4 LT |
855 | |
856 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
857 | return -EINVAL; | |
858 | ||
f29972de MH |
859 | memset(&la, 0, sizeof(la)); |
860 | len = min_t(unsigned int, sizeof(la), alen); | |
861 | memcpy(&la, addr, len); | |
862 | ||
2a517ca6 MH |
863 | if (la.l2_cid) |
864 | return -EINVAL; | |
865 | ||
1da177e4 LT |
866 | lock_sock(sk); |
867 | ||
868 | if (sk->sk_state != BT_OPEN) { | |
869 | err = -EBADFD; | |
870 | goto done; | |
871 | } | |
872 | ||
b4324b5d | 873 | if (la.l2_psm && __le16_to_cpu(la.l2_psm) < 0x1001 && |
847641d7 MH |
874 | !capable(CAP_NET_BIND_SERVICE)) { |
875 | err = -EACCES; | |
876 | goto done; | |
877 | } | |
8e87d142 | 878 | |
1da177e4 LT |
879 | write_lock_bh(&l2cap_sk_list.lock); |
880 | ||
f29972de | 881 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
1da177e4 LT |
882 | err = -EADDRINUSE; |
883 | } else { | |
884 | /* Save source address */ | |
f29972de MH |
885 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
886 | l2cap_pi(sk)->psm = la.l2_psm; | |
887 | l2cap_pi(sk)->sport = la.l2_psm; | |
1da177e4 | 888 | sk->sk_state = BT_BOUND; |
2af6b9d5 | 889 | |
b4324b5d MH |
890 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
891 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
2af6b9d5 | 892 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
1da177e4 LT |
893 | } |
894 | ||
895 | write_unlock_bh(&l2cap_sk_list.lock); | |
896 | ||
897 | done: | |
898 | release_sock(sk); | |
899 | return err; | |
900 | } | |
901 | ||
902 | static int l2cap_do_connect(struct sock *sk) | |
903 | { | |
904 | bdaddr_t *src = &bt_sk(sk)->src; | |
905 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
906 | struct l2cap_conn *conn; | |
907 | struct hci_conn *hcon; | |
908 | struct hci_dev *hdev; | |
09ab6f4c | 909 | __u8 auth_type; |
44d0e48e | 910 | int err; |
1da177e4 | 911 | |
f29972de MH |
912 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
913 | l2cap_pi(sk)->psm); | |
1da177e4 | 914 | |
af05b30b GP |
915 | hdev = hci_get_route(dst, src); |
916 | if (!hdev) | |
1da177e4 LT |
917 | return -EHOSTUNREACH; |
918 | ||
919 | hci_dev_lock_bh(hdev); | |
920 | ||
921 | err = -ENOMEM; | |
922 | ||
8c1b2355 | 923 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
924 | switch (l2cap_pi(sk)->sec_level) { |
925 | case BT_SECURITY_HIGH: | |
8c1b2355 | 926 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
927 | break; |
928 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 929 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
930 | break; |
931 | default: | |
09ab6f4c | 932 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
933 | break; |
934 | } | |
8c1b2355 | 935 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 936 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 937 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 938 | else |
8c1b2355 | 939 | auth_type = HCI_AT_NO_BONDING; |
435fef20 MH |
940 | |
941 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
942 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
8c1b2355 | 943 | } else { |
2af6b9d5 MH |
944 | switch (l2cap_pi(sk)->sec_level) { |
945 | case BT_SECURITY_HIGH: | |
8c1b2355 | 946 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
947 | break; |
948 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 949 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
950 | break; |
951 | default: | |
8c1b2355 | 952 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
953 | break; |
954 | } | |
09ab6f4c MH |
955 | } |
956 | ||
2af6b9d5 MH |
957 | hcon = hci_connect(hdev, ACL_LINK, dst, |
958 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
959 | if (!hcon) |
960 | goto done; | |
961 | ||
962 | conn = l2cap_conn_add(hcon, 0); | |
963 | if (!conn) { | |
964 | hci_conn_put(hcon); | |
965 | goto done; | |
966 | } | |
967 | ||
968 | err = 0; | |
969 | ||
970 | /* Update source addr of the socket */ | |
971 | bacpy(src, conn->src); | |
972 | ||
973 | l2cap_chan_add(conn, sk, NULL); | |
974 | ||
975 | sk->sk_state = BT_CONNECT; | |
976 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
977 | ||
978 | if (hcon->state == BT_CONNECTED) { | |
79d554a6 | 979 | if (sk->sk_type != SOCK_SEQPACKET) { |
1da177e4 LT |
980 | l2cap_sock_clear_timer(sk); |
981 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
982 | } else |
983 | l2cap_do_start(sk); | |
1da177e4 LT |
984 | } |
985 | ||
986 | done: | |
987 | hci_dev_unlock_bh(hdev); | |
988 | hci_dev_put(hdev); | |
989 | return err; | |
990 | } | |
991 | ||
992 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
993 | { | |
1da177e4 | 994 | struct sock *sk = sock->sk; |
f29972de MH |
995 | struct sockaddr_l2 la; |
996 | int len, err = 0; | |
1da177e4 | 997 | |
1da177e4 LT |
998 | BT_DBG("sk %p", sk); |
999 | ||
2a517ca6 MH |
1000 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
1001 | return -EINVAL; | |
1da177e4 | 1002 | |
f29972de MH |
1003 | memset(&la, 0, sizeof(la)); |
1004 | len = min_t(unsigned int, sizeof(la), alen); | |
1005 | memcpy(&la, addr, len); | |
1006 | ||
2a517ca6 MH |
1007 | if (la.l2_cid) |
1008 | return -EINVAL; | |
1009 | ||
1010 | lock_sock(sk); | |
1011 | ||
f29972de | 1012 | if (sk->sk_type == SOCK_SEQPACKET && !la.l2_psm) { |
1da177e4 LT |
1013 | err = -EINVAL; |
1014 | goto done; | |
1015 | } | |
1016 | ||
c6b03cf9 MH |
1017 | switch (l2cap_pi(sk)->mode) { |
1018 | case L2CAP_MODE_BASIC: | |
1019 | break; | |
1020 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1021 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1022 | if (enable_ertm) |
1023 | break; | |
1024 | /* fall through */ | |
1025 | default: | |
1026 | err = -ENOTSUPP; | |
1027 | goto done; | |
1028 | } | |
1029 | ||
af05b30b | 1030 | switch (sk->sk_state) { |
1da177e4 LT |
1031 | case BT_CONNECT: |
1032 | case BT_CONNECT2: | |
1033 | case BT_CONFIG: | |
1034 | /* Already connecting */ | |
1035 | goto wait; | |
1036 | ||
1037 | case BT_CONNECTED: | |
1038 | /* Already connected */ | |
1039 | goto done; | |
1040 | ||
1041 | case BT_OPEN: | |
1042 | case BT_BOUND: | |
1043 | /* Can connect */ | |
1044 | break; | |
1045 | ||
1046 | default: | |
1047 | err = -EBADFD; | |
1048 | goto done; | |
1049 | } | |
1050 | ||
1051 | /* Set destination address and psm */ | |
f29972de MH |
1052 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
1053 | l2cap_pi(sk)->psm = la.l2_psm; | |
1da177e4 | 1054 | |
af05b30b GP |
1055 | err = l2cap_do_connect(sk); |
1056 | if (err) | |
1da177e4 LT |
1057 | goto done; |
1058 | ||
1059 | wait: | |
1060 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
1061 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
1062 | done: | |
1063 | release_sock(sk); | |
1064 | return err; | |
1065 | } | |
1066 | ||
1067 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
1068 | { | |
1069 | struct sock *sk = sock->sk; | |
1070 | int err = 0; | |
1071 | ||
1072 | BT_DBG("sk %p backlog %d", sk, backlog); | |
1073 | ||
1074 | lock_sock(sk); | |
1075 | ||
1076 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
1077 | err = -EBADFD; | |
1078 | goto done; | |
1079 | } | |
1080 | ||
c6b03cf9 MH |
1081 | switch (l2cap_pi(sk)->mode) { |
1082 | case L2CAP_MODE_BASIC: | |
1083 | break; | |
1084 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1085 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1086 | if (enable_ertm) |
1087 | break; | |
1088 | /* fall through */ | |
1089 | default: | |
1090 | err = -ENOTSUPP; | |
1091 | goto done; | |
1092 | } | |
1093 | ||
1da177e4 LT |
1094 | if (!l2cap_pi(sk)->psm) { |
1095 | bdaddr_t *src = &bt_sk(sk)->src; | |
1096 | u16 psm; | |
1097 | ||
1098 | err = -EINVAL; | |
1099 | ||
1100 | write_lock_bh(&l2cap_sk_list.lock); | |
1101 | ||
1102 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
b4324b5d MH |
1103 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
1104 | l2cap_pi(sk)->psm = cpu_to_le16(psm); | |
1105 | l2cap_pi(sk)->sport = cpu_to_le16(psm); | |
1da177e4 LT |
1106 | err = 0; |
1107 | break; | |
1108 | } | |
1109 | ||
1110 | write_unlock_bh(&l2cap_sk_list.lock); | |
1111 | ||
1112 | if (err < 0) | |
1113 | goto done; | |
1114 | } | |
1115 | ||
1116 | sk->sk_max_ack_backlog = backlog; | |
1117 | sk->sk_ack_backlog = 0; | |
1118 | sk->sk_state = BT_LISTEN; | |
1119 | ||
1120 | done: | |
1121 | release_sock(sk); | |
1122 | return err; | |
1123 | } | |
1124 | ||
1125 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
1126 | { | |
1127 | DECLARE_WAITQUEUE(wait, current); | |
1128 | struct sock *sk = sock->sk, *nsk; | |
1129 | long timeo; | |
1130 | int err = 0; | |
1131 | ||
fcc70d5f | 1132 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1133 | |
1134 | if (sk->sk_state != BT_LISTEN) { | |
1135 | err = -EBADFD; | |
1136 | goto done; | |
1137 | } | |
1138 | ||
1139 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1140 | ||
1141 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1142 | ||
1143 | /* Wait for an incoming connection. (wake-one). */ | |
1144 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
1145 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
1146 | set_current_state(TASK_INTERRUPTIBLE); | |
1147 | if (!timeo) { | |
1148 | err = -EAGAIN; | |
1149 | break; | |
1150 | } | |
1151 | ||
1152 | release_sock(sk); | |
1153 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1154 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1155 | |
1156 | if (sk->sk_state != BT_LISTEN) { | |
1157 | err = -EBADFD; | |
1158 | break; | |
1159 | } | |
1160 | ||
1161 | if (signal_pending(current)) { | |
1162 | err = sock_intr_errno(timeo); | |
1163 | break; | |
1164 | } | |
1165 | } | |
1166 | set_current_state(TASK_RUNNING); | |
1167 | remove_wait_queue(sk->sk_sleep, &wait); | |
1168 | ||
1169 | if (err) | |
1170 | goto done; | |
1171 | ||
1172 | newsock->state = SS_CONNECTED; | |
1173 | ||
1174 | BT_DBG("new socket %p", nsk); | |
1175 | ||
1176 | done: | |
1177 | release_sock(sk); | |
1178 | return err; | |
1179 | } | |
1180 | ||
1181 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1182 | { | |
1183 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1184 | struct sock *sk = sock->sk; | |
1185 | ||
1186 | BT_DBG("sock %p, sk %p", sock, sk); | |
1187 | ||
1188 | addr->sa_family = AF_BLUETOOTH; | |
1189 | *len = sizeof(struct sockaddr_l2); | |
1190 | ||
f29972de MH |
1191 | if (peer) { |
1192 | la->l2_psm = l2cap_pi(sk)->psm; | |
1da177e4 | 1193 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
b4324b5d | 1194 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
f29972de MH |
1195 | } else { |
1196 | la->l2_psm = l2cap_pi(sk)->sport; | |
1da177e4 | 1197 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
b4324b5d | 1198 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
f29972de | 1199 | } |
1da177e4 | 1200 | |
1da177e4 LT |
1201 | return 0; |
1202 | } | |
1203 | ||
e90bac06 GP |
1204 | static void l2cap_monitor_timeout(unsigned long arg) |
1205 | { | |
1206 | struct sock *sk = (void *) arg; | |
1207 | u16 control; | |
1208 | ||
e686219a | 1209 | bh_lock_sock(sk); |
e90bac06 GP |
1210 | if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { |
1211 | l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk); | |
1212 | return; | |
1213 | } | |
1214 | ||
1215 | l2cap_pi(sk)->retry_count++; | |
1216 | __mod_monitor_timer(); | |
1217 | ||
1218 | control = L2CAP_CTRL_POLL; | |
7e743090 | 1219 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); |
e686219a | 1220 | bh_unlock_sock(sk); |
e90bac06 GP |
1221 | } |
1222 | ||
1223 | static void l2cap_retrans_timeout(unsigned long arg) | |
1224 | { | |
1225 | struct sock *sk = (void *) arg; | |
1226 | u16 control; | |
1227 | ||
e686219a | 1228 | bh_lock_sock(sk); |
e90bac06 GP |
1229 | l2cap_pi(sk)->retry_count = 1; |
1230 | __mod_monitor_timer(); | |
1231 | ||
1232 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
1233 | ||
1234 | control = L2CAP_CTRL_POLL; | |
7e743090 | 1235 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); |
e686219a | 1236 | bh_unlock_sock(sk); |
e90bac06 GP |
1237 | } |
1238 | ||
1c2acffb | 1239 | static void l2cap_drop_acked_frames(struct sock *sk) |
1da177e4 | 1240 | { |
1c2acffb | 1241 | struct sk_buff *skb; |
1da177e4 | 1242 | |
1c2acffb GP |
1243 | while ((skb = skb_peek(TX_QUEUE(sk)))) { |
1244 | if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq) | |
1245 | break; | |
1da177e4 | 1246 | |
1c2acffb GP |
1247 | skb = skb_dequeue(TX_QUEUE(sk)); |
1248 | kfree_skb(skb); | |
1da177e4 | 1249 | |
1c2acffb GP |
1250 | l2cap_pi(sk)->unacked_frames--; |
1251 | } | |
1da177e4 | 1252 | |
e90bac06 GP |
1253 | if (!l2cap_pi(sk)->unacked_frames) |
1254 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
1255 | ||
1c2acffb GP |
1256 | return; |
1257 | } | |
1da177e4 | 1258 | |
1c2acffb GP |
1259 | static inline int l2cap_do_send(struct sock *sk, struct sk_buff *skb) |
1260 | { | |
1261 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1262 | int err; | |
1263 | ||
1264 | BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len); | |
1da177e4 | 1265 | |
1c2acffb GP |
1266 | err = hci_send_acl(pi->conn->hcon, skb, 0); |
1267 | if (err < 0) | |
1268 | kfree_skb(skb); | |
1269 | ||
1270 | return err; | |
1271 | } | |
1272 | ||
6840ed07 GP |
1273 | static int l2cap_streaming_send(struct sock *sk) |
1274 | { | |
1275 | struct sk_buff *skb, *tx_skb; | |
1276 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1277 | u16 control, fcs; |
6840ed07 GP |
1278 | int err; |
1279 | ||
1280 | while ((skb = sk->sk_send_head)) { | |
1281 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1282 | ||
1283 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
1284 | control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; | |
1285 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1286 | ||
fcc203c3 GP |
1287 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { |
1288 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1289 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1290 | } | |
1291 | ||
6840ed07 GP |
1292 | err = l2cap_do_send(sk, tx_skb); |
1293 | if (err < 0) { | |
1294 | l2cap_send_disconn_req(pi->conn, sk); | |
1295 | return err; | |
1296 | } | |
1297 | ||
1298 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1299 | ||
1300 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1301 | sk->sk_send_head = NULL; | |
1302 | else | |
1303 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
1304 | ||
1305 | skb = skb_dequeue(TX_QUEUE(sk)); | |
1306 | kfree_skb(skb); | |
1307 | } | |
1308 | return 0; | |
1309 | } | |
1310 | ||
8f17154f GP |
1311 | static int l2cap_retransmit_frame(struct sock *sk, u8 tx_seq) |
1312 | { | |
1313 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1314 | struct sk_buff *skb, *tx_skb; | |
1315 | u16 control, fcs; | |
1316 | int err; | |
1317 | ||
1318 | skb = skb_peek(TX_QUEUE(sk)); | |
1319 | do { | |
1320 | if (bt_cb(skb)->tx_seq != tx_seq) { | |
1321 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1322 | break; | |
1323 | skb = skb_queue_next(TX_QUEUE(sk), skb); | |
1324 | continue; | |
1325 | } | |
1326 | ||
1327 | if (pi->remote_max_tx && | |
1328 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
1329 | l2cap_send_disconn_req(pi->conn, sk); | |
1330 | break; | |
1331 | } | |
1332 | ||
1333 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1334 | bt_cb(skb)->retries++; | |
1335 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
1336 | control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT) | |
1337 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); | |
1338 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1339 | ||
1340 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { | |
1341 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1342 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1343 | } | |
1344 | ||
1345 | err = l2cap_do_send(sk, tx_skb); | |
1346 | if (err < 0) { | |
1347 | l2cap_send_disconn_req(pi->conn, sk); | |
1348 | return err; | |
1349 | } | |
1350 | break; | |
1351 | } while(1); | |
1352 | return 0; | |
1353 | } | |
1354 | ||
1c2acffb GP |
1355 | static int l2cap_ertm_send(struct sock *sk) |
1356 | { | |
1357 | struct sk_buff *skb, *tx_skb; | |
1358 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1359 | u16 control, fcs; |
1c2acffb GP |
1360 | int err; |
1361 | ||
e90bac06 GP |
1362 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
1363 | return 0; | |
1364 | ||
f64f9e71 JP |
1365 | while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk)) && |
1366 | !(pi->conn_state & L2CAP_CONN_REMOTE_BUSY)) { | |
1c2acffb GP |
1367 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
1368 | ||
e90bac06 GP |
1369 | if (pi->remote_max_tx && |
1370 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
1371 | l2cap_send_disconn_req(pi->conn, sk); | |
1372 | break; | |
1373 | } | |
1374 | ||
1375 | bt_cb(skb)->retries++; | |
1376 | ||
1c2acffb GP |
1377 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
1378 | control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT) | |
1379 | | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); | |
1380 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1381 | ||
e90bac06 | 1382 | |
fcc203c3 GP |
1383 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { |
1384 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); | |
1385 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); | |
1386 | } | |
1387 | ||
1c2acffb GP |
1388 | err = l2cap_do_send(sk, tx_skb); |
1389 | if (err < 0) { | |
1390 | l2cap_send_disconn_req(pi->conn, sk); | |
1391 | return err; | |
1392 | } | |
e90bac06 | 1393 | __mod_retrans_timer(); |
1c2acffb GP |
1394 | |
1395 | bt_cb(skb)->tx_seq = pi->next_tx_seq; | |
1396 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1397 | ||
1398 | pi->unacked_frames++; | |
1399 | ||
1400 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1401 | sk->sk_send_head = NULL; | |
1402 | else | |
1403 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
1404 | } | |
1405 | ||
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb) | |
1410 | { | |
1411 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1412 | struct sk_buff **frag; | |
1413 | int err, sent = 0; | |
1da177e4 LT |
1414 | |
1415 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
1c2acffb | 1416 | return -EFAULT; |
1da177e4 LT |
1417 | } |
1418 | ||
1419 | sent += count; | |
1420 | len -= count; | |
1421 | ||
1422 | /* Continuation fragments (no L2CAP header) */ | |
1423 | frag = &skb_shinfo(skb)->frag_list; | |
1424 | while (len) { | |
1425 | count = min_t(unsigned int, conn->mtu, len); | |
1426 | ||
1427 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1428 | if (!*frag) | |
1c2acffb GP |
1429 | return -EFAULT; |
1430 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) | |
1431 | return -EFAULT; | |
1da177e4 LT |
1432 | |
1433 | sent += count; | |
1434 | len -= count; | |
1435 | ||
1436 | frag = &(*frag)->next; | |
1437 | } | |
1da177e4 LT |
1438 | |
1439 | return sent; | |
1c2acffb | 1440 | } |
1da177e4 | 1441 | |
1c2acffb GP |
1442 | static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
1443 | { | |
1444 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1445 | struct sk_buff *skb; | |
1446 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1447 | struct l2cap_hdr *lh; | |
1448 | ||
1449 | BT_DBG("sk %p len %d", sk, (int)len); | |
1450 | ||
1451 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1452 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1453 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1454 | if (!skb) | |
1455 | return ERR_PTR(-ENOMEM); | |
1456 | ||
1457 | /* Create L2CAP header */ | |
1458 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1459 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1460 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1461 | put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2)); | |
1462 | ||
1463 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1464 | if (unlikely(err < 0)) { | |
1465 | kfree_skb(skb); | |
1466 | return ERR_PTR(err); | |
1467 | } | |
1468 | return skb; | |
1469 | } | |
1470 | ||
1471 | static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len) | |
1472 | { | |
1473 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1474 | struct sk_buff *skb; | |
1475 | int err, count, hlen = L2CAP_HDR_SIZE; | |
1476 | struct l2cap_hdr *lh; | |
1477 | ||
1478 | BT_DBG("sk %p len %d", sk, (int)len); | |
1479 | ||
1480 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1481 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1482 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1483 | if (!skb) | |
1484 | return ERR_PTR(-ENOMEM); | |
1485 | ||
1486 | /* Create L2CAP header */ | |
1487 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1488 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1489 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1490 | ||
1491 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1492 | if (unlikely(err < 0)) { | |
1493 | kfree_skb(skb); | |
1494 | return ERR_PTR(err); | |
1495 | } | |
1496 | return skb; | |
1497 | } | |
1498 | ||
6840ed07 | 1499 | static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
1c2acffb GP |
1500 | { |
1501 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1502 | struct sk_buff *skb; | |
1503 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1504 | struct l2cap_hdr *lh; | |
1505 | ||
1506 | BT_DBG("sk %p len %d", sk, (int)len); | |
1507 | ||
c74e560c GP |
1508 | if (sdulen) |
1509 | hlen += 2; | |
1510 | ||
fcc203c3 GP |
1511 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1512 | hlen += 2; | |
1513 | ||
1c2acffb GP |
1514 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
1515 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1516 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1517 | if (!skb) | |
1518 | return ERR_PTR(-ENOMEM); | |
1519 | ||
1520 | /* Create L2CAP header */ | |
1521 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1522 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1523 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1524 | put_unaligned_le16(control, skb_put(skb, 2)); | |
c74e560c GP |
1525 | if (sdulen) |
1526 | put_unaligned_le16(sdulen, skb_put(skb, 2)); | |
1c2acffb GP |
1527 | |
1528 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1529 | if (unlikely(err < 0)) { | |
1530 | kfree_skb(skb); | |
1531 | return ERR_PTR(err); | |
1532 | } | |
e90bac06 | 1533 | |
fcc203c3 GP |
1534 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1535 | put_unaligned_le16(0, skb_put(skb, 2)); | |
1536 | ||
e90bac06 | 1537 | bt_cb(skb)->retries = 0; |
1c2acffb | 1538 | return skb; |
1da177e4 LT |
1539 | } |
1540 | ||
c74e560c GP |
1541 | static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len) |
1542 | { | |
1543 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1544 | struct sk_buff *skb; | |
1545 | struct sk_buff_head sar_queue; | |
1546 | u16 control; | |
1547 | size_t size = 0; | |
1548 | ||
1549 | __skb_queue_head_init(&sar_queue); | |
1550 | control = L2CAP_SDU_START; | |
6840ed07 | 1551 | skb = l2cap_create_iframe_pdu(sk, msg, pi->max_pdu_size, control, len); |
c74e560c GP |
1552 | if (IS_ERR(skb)) |
1553 | return PTR_ERR(skb); | |
1554 | ||
1555 | __skb_queue_tail(&sar_queue, skb); | |
1556 | len -= pi->max_pdu_size; | |
1557 | size +=pi->max_pdu_size; | |
1558 | control = 0; | |
1559 | ||
1560 | while (len > 0) { | |
1561 | size_t buflen; | |
1562 | ||
1563 | if (len > pi->max_pdu_size) { | |
1564 | control |= L2CAP_SDU_CONTINUE; | |
1565 | buflen = pi->max_pdu_size; | |
1566 | } else { | |
1567 | control |= L2CAP_SDU_END; | |
1568 | buflen = len; | |
1569 | } | |
1570 | ||
6840ed07 | 1571 | skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0); |
c74e560c GP |
1572 | if (IS_ERR(skb)) { |
1573 | skb_queue_purge(&sar_queue); | |
1574 | return PTR_ERR(skb); | |
1575 | } | |
1576 | ||
1577 | __skb_queue_tail(&sar_queue, skb); | |
1578 | len -= buflen; | |
1579 | size += buflen; | |
1580 | control = 0; | |
1581 | } | |
1582 | skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk)); | |
1583 | if (sk->sk_send_head == NULL) | |
1584 | sk->sk_send_head = sar_queue.next; | |
1585 | ||
1586 | return size; | |
1587 | } | |
1588 | ||
1da177e4 LT |
1589 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
1590 | { | |
1591 | struct sock *sk = sock->sk; | |
1c2acffb GP |
1592 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
1593 | struct sk_buff *skb; | |
1594 | u16 control; | |
1595 | int err; | |
1da177e4 LT |
1596 | |
1597 | BT_DBG("sock %p, sk %p", sock, sk); | |
1598 | ||
c1cbe4b7 BL |
1599 | err = sock_error(sk); |
1600 | if (err) | |
1601 | return err; | |
1da177e4 LT |
1602 | |
1603 | if (msg->msg_flags & MSG_OOB) | |
1604 | return -EOPNOTSUPP; | |
1605 | ||
1606 | /* Check outgoing MTU */ | |
f64f9e71 JP |
1607 | if (sk->sk_type == SOCK_SEQPACKET && pi->mode == L2CAP_MODE_BASIC && |
1608 | len > pi->omtu) | |
1da177e4 LT |
1609 | return -EINVAL; |
1610 | ||
1611 | lock_sock(sk); | |
1612 | ||
1c2acffb | 1613 | if (sk->sk_state != BT_CONNECTED) { |
1da177e4 | 1614 | err = -ENOTCONN; |
1c2acffb GP |
1615 | goto done; |
1616 | } | |
1da177e4 | 1617 | |
1c2acffb GP |
1618 | /* Connectionless channel */ |
1619 | if (sk->sk_type == SOCK_DGRAM) { | |
1620 | skb = l2cap_create_connless_pdu(sk, msg, len); | |
1621 | err = l2cap_do_send(sk, skb); | |
1622 | goto done; | |
1623 | } | |
1624 | ||
1625 | switch (pi->mode) { | |
1626 | case L2CAP_MODE_BASIC: | |
1627 | /* Create a basic PDU */ | |
1628 | skb = l2cap_create_basic_pdu(sk, msg, len); | |
1629 | if (IS_ERR(skb)) { | |
1630 | err = PTR_ERR(skb); | |
1631 | goto done; | |
1632 | } | |
1633 | ||
1634 | err = l2cap_do_send(sk, skb); | |
1635 | if (!err) | |
1636 | err = len; | |
1637 | break; | |
1638 | ||
1639 | case L2CAP_MODE_ERTM: | |
6840ed07 | 1640 | case L2CAP_MODE_STREAMING: |
1c2acffb | 1641 | /* Entire SDU fits into one PDU */ |
c74e560c | 1642 | if (len <= pi->max_pdu_size) { |
1c2acffb | 1643 | control = L2CAP_SDU_UNSEGMENTED; |
6840ed07 | 1644 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
1c2acffb GP |
1645 | if (IS_ERR(skb)) { |
1646 | err = PTR_ERR(skb); | |
1647 | goto done; | |
1648 | } | |
c74e560c GP |
1649 | __skb_queue_tail(TX_QUEUE(sk), skb); |
1650 | if (sk->sk_send_head == NULL) | |
1651 | sk->sk_send_head = skb; | |
1c2acffb | 1652 | } else { |
c74e560c GP |
1653 | /* Segment SDU into multiples PDUs */ |
1654 | err = l2cap_sar_segment_sdu(sk, msg, len); | |
1655 | if (err < 0) | |
1656 | goto done; | |
1c2acffb | 1657 | } |
1c2acffb | 1658 | |
6840ed07 GP |
1659 | if (pi->mode == L2CAP_MODE_STREAMING) |
1660 | err = l2cap_streaming_send(sk); | |
1661 | else | |
1662 | err = l2cap_ertm_send(sk); | |
1663 | ||
1c2acffb GP |
1664 | if (!err) |
1665 | err = len; | |
1666 | break; | |
1667 | ||
1668 | default: | |
1669 | BT_DBG("bad state %1.1x", pi->mode); | |
1670 | err = -EINVAL; | |
1671 | } | |
1672 | ||
1673 | done: | |
1da177e4 LT |
1674 | release_sock(sk); |
1675 | return err; | |
1676 | } | |
1677 | ||
f66dc81f MH |
1678 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1679 | { | |
1680 | struct sock *sk = sock->sk; | |
1681 | ||
1682 | lock_sock(sk); | |
1683 | ||
1684 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1685 | struct l2cap_conn_rsp rsp; | |
1686 | ||
1687 | sk->sk_state = BT_CONFIG; | |
1688 | ||
1689 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1690 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1691 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1692 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1693 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1694 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1695 | ||
1696 | release_sock(sk); | |
1697 | return 0; | |
1698 | } | |
1699 | ||
1700 | release_sock(sk); | |
1701 | ||
1702 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1703 | } | |
1704 | ||
b7058842 | 1705 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
1706 | { |
1707 | struct sock *sk = sock->sk; | |
1708 | struct l2cap_options opts; | |
f29972de | 1709 | int len, err = 0; |
1da177e4 LT |
1710 | u32 opt; |
1711 | ||
1712 | BT_DBG("sk %p", sk); | |
1713 | ||
1714 | lock_sock(sk); | |
1715 | ||
1716 | switch (optname) { | |
1717 | case L2CAP_OPTIONS: | |
0878b666 MH |
1718 | opts.imtu = l2cap_pi(sk)->imtu; |
1719 | opts.omtu = l2cap_pi(sk)->omtu; | |
1720 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1721 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1722 | opts.fcs = l2cap_pi(sk)->fcs; |
0878b666 | 1723 | |
1da177e4 LT |
1724 | len = min_t(unsigned int, sizeof(opts), optlen); |
1725 | if (copy_from_user((char *) &opts, optval, len)) { | |
1726 | err = -EFAULT; | |
1727 | break; | |
1728 | } | |
0878b666 | 1729 | |
c6b03cf9 MH |
1730 | l2cap_pi(sk)->imtu = opts.imtu; |
1731 | l2cap_pi(sk)->omtu = opts.omtu; | |
1732 | l2cap_pi(sk)->mode = opts.mode; | |
fcc203c3 | 1733 | l2cap_pi(sk)->fcs = opts.fcs; |
1da177e4 LT |
1734 | break; |
1735 | ||
1736 | case L2CAP_LM: | |
1737 | if (get_user(opt, (u32 __user *) optval)) { | |
1738 | err = -EFAULT; | |
1739 | break; | |
1740 | } | |
1741 | ||
2af6b9d5 MH |
1742 | if (opt & L2CAP_LM_AUTH) |
1743 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
1744 | if (opt & L2CAP_LM_ENCRYPT) | |
1745 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
1746 | if (opt & L2CAP_LM_SECURE) | |
1747 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
1748 | ||
1749 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
1750 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
1751 | break; |
1752 | ||
1753 | default: | |
1754 | err = -ENOPROTOOPT; | |
1755 | break; | |
1756 | } | |
1757 | ||
1758 | release_sock(sk); | |
1759 | return err; | |
1760 | } | |
1761 | ||
b7058842 | 1762 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
d58daf42 MH |
1763 | { |
1764 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
1765 | struct bt_security sec; |
1766 | int len, err = 0; | |
f66dc81f | 1767 | u32 opt; |
d58daf42 MH |
1768 | |
1769 | BT_DBG("sk %p", sk); | |
1770 | ||
1771 | if (level == SOL_L2CAP) | |
1772 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
1773 | ||
0588d94f MH |
1774 | if (level != SOL_BLUETOOTH) |
1775 | return -ENOPROTOOPT; | |
1776 | ||
d58daf42 MH |
1777 | lock_sock(sk); |
1778 | ||
1779 | switch (optname) { | |
2af6b9d5 | 1780 | case BT_SECURITY: |
2526d3d8 | 1781 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1782 | err = -EINVAL; |
1783 | break; | |
1784 | } | |
1785 | ||
2af6b9d5 MH |
1786 | sec.level = BT_SECURITY_LOW; |
1787 | ||
1788 | len = min_t(unsigned int, sizeof(sec), optlen); | |
1789 | if (copy_from_user((char *) &sec, optval, len)) { | |
1790 | err = -EFAULT; | |
1791 | break; | |
1792 | } | |
1793 | ||
1794 | if (sec.level < BT_SECURITY_LOW || | |
1795 | sec.level > BT_SECURITY_HIGH) { | |
1796 | err = -EINVAL; | |
1797 | break; | |
1798 | } | |
1799 | ||
1800 | l2cap_pi(sk)->sec_level = sec.level; | |
1801 | break; | |
1802 | ||
f66dc81f MH |
1803 | case BT_DEFER_SETUP: |
1804 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1805 | err = -EINVAL; | |
1806 | break; | |
1807 | } | |
1808 | ||
1809 | if (get_user(opt, (u32 __user *) optval)) { | |
1810 | err = -EFAULT; | |
1811 | break; | |
1812 | } | |
1813 | ||
1814 | bt_sk(sk)->defer_setup = opt; | |
1815 | break; | |
1816 | ||
d58daf42 MH |
1817 | default: |
1818 | err = -ENOPROTOOPT; | |
1819 | break; | |
1820 | } | |
1821 | ||
1822 | release_sock(sk); | |
1823 | return err; | |
1824 | } | |
1825 | ||
1826 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
1827 | { |
1828 | struct sock *sk = sock->sk; | |
1829 | struct l2cap_options opts; | |
1830 | struct l2cap_conninfo cinfo; | |
1831 | int len, err = 0; | |
2af6b9d5 | 1832 | u32 opt; |
1da177e4 LT |
1833 | |
1834 | BT_DBG("sk %p", sk); | |
1835 | ||
1836 | if (get_user(len, optlen)) | |
1837 | return -EFAULT; | |
1838 | ||
1839 | lock_sock(sk); | |
1840 | ||
1841 | switch (optname) { | |
1842 | case L2CAP_OPTIONS: | |
1843 | opts.imtu = l2cap_pi(sk)->imtu; | |
1844 | opts.omtu = l2cap_pi(sk)->omtu; | |
1845 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1846 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1847 | opts.fcs = l2cap_pi(sk)->fcs; |
1da177e4 LT |
1848 | |
1849 | len = min_t(unsigned int, len, sizeof(opts)); | |
1850 | if (copy_to_user(optval, (char *) &opts, len)) | |
1851 | err = -EFAULT; | |
1852 | ||
1853 | break; | |
1854 | ||
1855 | case L2CAP_LM: | |
2af6b9d5 MH |
1856 | switch (l2cap_pi(sk)->sec_level) { |
1857 | case BT_SECURITY_LOW: | |
1858 | opt = L2CAP_LM_AUTH; | |
1859 | break; | |
1860 | case BT_SECURITY_MEDIUM: | |
1861 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
1862 | break; | |
1863 | case BT_SECURITY_HIGH: | |
1864 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
1865 | L2CAP_LM_SECURE; | |
1866 | break; | |
1867 | default: | |
1868 | opt = 0; | |
1869 | break; | |
1870 | } | |
1871 | ||
1872 | if (l2cap_pi(sk)->role_switch) | |
1873 | opt |= L2CAP_LM_MASTER; | |
1874 | ||
1875 | if (l2cap_pi(sk)->force_reliable) | |
1876 | opt |= L2CAP_LM_RELIABLE; | |
1877 | ||
1878 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
1879 | err = -EFAULT; |
1880 | break; | |
1881 | ||
1882 | case L2CAP_CONNINFO: | |
f66dc81f MH |
1883 | if (sk->sk_state != BT_CONNECTED && |
1884 | !(sk->sk_state == BT_CONNECT2 && | |
1885 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
1886 | err = -ENOTCONN; |
1887 | break; | |
1888 | } | |
1889 | ||
1890 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
1891 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
1892 | ||
1893 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
1894 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
1895 | err = -EFAULT; | |
1896 | ||
1897 | break; | |
1898 | ||
1899 | default: | |
1900 | err = -ENOPROTOOPT; | |
1901 | break; | |
1902 | } | |
1903 | ||
1904 | release_sock(sk); | |
1905 | return err; | |
1906 | } | |
1907 | ||
d58daf42 MH |
1908 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
1909 | { | |
1910 | struct sock *sk = sock->sk; | |
2af6b9d5 | 1911 | struct bt_security sec; |
d58daf42 MH |
1912 | int len, err = 0; |
1913 | ||
1914 | BT_DBG("sk %p", sk); | |
1915 | ||
1916 | if (level == SOL_L2CAP) | |
1917 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
1918 | ||
0588d94f MH |
1919 | if (level != SOL_BLUETOOTH) |
1920 | return -ENOPROTOOPT; | |
1921 | ||
d58daf42 MH |
1922 | if (get_user(len, optlen)) |
1923 | return -EFAULT; | |
1924 | ||
1925 | lock_sock(sk); | |
1926 | ||
1927 | switch (optname) { | |
2af6b9d5 | 1928 | case BT_SECURITY: |
2526d3d8 | 1929 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1930 | err = -EINVAL; |
1931 | break; | |
1932 | } | |
1933 | ||
2af6b9d5 MH |
1934 | sec.level = l2cap_pi(sk)->sec_level; |
1935 | ||
1936 | len = min_t(unsigned int, len, sizeof(sec)); | |
1937 | if (copy_to_user(optval, (char *) &sec, len)) | |
1938 | err = -EFAULT; | |
1939 | ||
1940 | break; | |
1941 | ||
f66dc81f MH |
1942 | case BT_DEFER_SETUP: |
1943 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1944 | err = -EINVAL; | |
1945 | break; | |
1946 | } | |
1947 | ||
1948 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
1949 | err = -EFAULT; | |
1950 | ||
1951 | break; | |
1952 | ||
d58daf42 MH |
1953 | default: |
1954 | err = -ENOPROTOOPT; | |
1955 | break; | |
1956 | } | |
1957 | ||
1958 | release_sock(sk); | |
1959 | return err; | |
1960 | } | |
1961 | ||
1da177e4 LT |
1962 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1963 | { | |
1964 | struct sock *sk = sock->sk; | |
1965 | int err = 0; | |
1966 | ||
1967 | BT_DBG("sock %p, sk %p", sock, sk); | |
1968 | ||
1969 | if (!sk) | |
1970 | return 0; | |
1971 | ||
1972 | lock_sock(sk); | |
1973 | if (!sk->sk_shutdown) { | |
1974 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1975 | l2cap_sock_clear_timer(sk); | |
1976 | __l2cap_sock_close(sk, 0); | |
1977 | ||
1978 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
1979 | err = bt_sock_wait_state(sk, BT_CLOSED, |
1980 | sk->sk_lingertime); | |
1da177e4 LT |
1981 | } |
1982 | release_sock(sk); | |
1983 | return err; | |
1984 | } | |
1985 | ||
1986 | static int l2cap_sock_release(struct socket *sock) | |
1987 | { | |
1988 | struct sock *sk = sock->sk; | |
1989 | int err; | |
1990 | ||
1991 | BT_DBG("sock %p, sk %p", sock, sk); | |
1992 | ||
1993 | if (!sk) | |
1994 | return 0; | |
1995 | ||
1996 | err = l2cap_sock_shutdown(sock, 2); | |
1997 | ||
1998 | sock_orphan(sk); | |
1999 | l2cap_sock_kill(sk); | |
2000 | return err; | |
2001 | } | |
2002 | ||
1da177e4 LT |
2003 | static void l2cap_chan_ready(struct sock *sk) |
2004 | { | |
2005 | struct sock *parent = bt_sk(sk)->parent; | |
2006 | ||
2007 | BT_DBG("sk %p, parent %p", sk, parent); | |
2008 | ||
2009 | l2cap_pi(sk)->conf_state = 0; | |
2010 | l2cap_sock_clear_timer(sk); | |
2011 | ||
2012 | if (!parent) { | |
2013 | /* Outgoing channel. | |
2014 | * Wake up socket sleeping on connect. | |
2015 | */ | |
2016 | sk->sk_state = BT_CONNECTED; | |
2017 | sk->sk_state_change(sk); | |
2018 | } else { | |
2019 | /* Incoming channel. | |
2020 | * Wake up socket sleeping on accept. | |
2021 | */ | |
2022 | parent->sk_data_ready(parent, 0); | |
2023 | } | |
2024 | } | |
2025 | ||
2026 | /* Copy frame to all raw sockets on that connection */ | |
2027 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
2028 | { | |
2029 | struct l2cap_chan_list *l = &conn->chan_list; | |
2030 | struct sk_buff *nskb; | |
af05b30b | 2031 | struct sock *sk; |
1da177e4 LT |
2032 | |
2033 | BT_DBG("conn %p", conn); | |
2034 | ||
2035 | read_lock(&l->lock); | |
2036 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2037 | if (sk->sk_type != SOCK_RAW) | |
2038 | continue; | |
2039 | ||
2040 | /* Don't send frame to the socket it came from */ | |
2041 | if (skb->sk == sk) | |
2042 | continue; | |
af05b30b GP |
2043 | nskb = skb_clone(skb, GFP_ATOMIC); |
2044 | if (!nskb) | |
1da177e4 LT |
2045 | continue; |
2046 | ||
2047 | if (sock_queue_rcv_skb(sk, nskb)) | |
2048 | kfree_skb(nskb); | |
2049 | } | |
2050 | read_unlock(&l->lock); | |
2051 | } | |
2052 | ||
2053 | /* ---- L2CAP signalling commands ---- */ | |
2054 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
2055 | u8 code, u8 ident, u16 dlen, void *data) | |
2056 | { | |
2057 | struct sk_buff *skb, **frag; | |
2058 | struct l2cap_cmd_hdr *cmd; | |
2059 | struct l2cap_hdr *lh; | |
2060 | int len, count; | |
2061 | ||
af05b30b GP |
2062 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
2063 | conn, code, ident, dlen); | |
1da177e4 LT |
2064 | |
2065 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
2066 | count = min_t(unsigned int, conn->mtu, len); | |
2067 | ||
2068 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
2069 | if (!skb) | |
2070 | return NULL; | |
2071 | ||
2072 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c | 2073 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
8db4dc46 | 2074 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
1da177e4 LT |
2075 | |
2076 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
2077 | cmd->code = code; | |
2078 | cmd->ident = ident; | |
aca3192c | 2079 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
2080 | |
2081 | if (dlen) { | |
2082 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
2083 | memcpy(skb_put(skb, count), data, count); | |
2084 | data += count; | |
2085 | } | |
2086 | ||
2087 | len -= skb->len; | |
2088 | ||
2089 | /* Continuation fragments (no L2CAP header) */ | |
2090 | frag = &skb_shinfo(skb)->frag_list; | |
2091 | while (len) { | |
2092 | count = min_t(unsigned int, conn->mtu, len); | |
2093 | ||
2094 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
2095 | if (!*frag) | |
2096 | goto fail; | |
2097 | ||
2098 | memcpy(skb_put(*frag, count), data, count); | |
2099 | ||
2100 | len -= count; | |
2101 | data += count; | |
2102 | ||
2103 | frag = &(*frag)->next; | |
2104 | } | |
2105 | ||
2106 | return skb; | |
2107 | ||
2108 | fail: | |
2109 | kfree_skb(skb); | |
2110 | return NULL; | |
2111 | } | |
2112 | ||
2113 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
2114 | { | |
2115 | struct l2cap_conf_opt *opt = *ptr; | |
2116 | int len; | |
2117 | ||
2118 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
2119 | *ptr += len; | |
2120 | ||
2121 | *type = opt->type; | |
2122 | *olen = opt->len; | |
2123 | ||
2124 | switch (opt->len) { | |
2125 | case 1: | |
2126 | *val = *((u8 *) opt->val); | |
2127 | break; | |
2128 | ||
2129 | case 2: | |
861d6882 | 2130 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
2131 | break; |
2132 | ||
2133 | case 4: | |
861d6882 | 2134 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
2135 | break; |
2136 | ||
2137 | default: | |
2138 | *val = (unsigned long) opt->val; | |
2139 | break; | |
2140 | } | |
2141 | ||
2142 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
2143 | return len; | |
2144 | } | |
2145 | ||
1da177e4 LT |
2146 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
2147 | { | |
2148 | struct l2cap_conf_opt *opt = *ptr; | |
2149 | ||
2150 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
2151 | ||
2152 | opt->type = type; | |
2153 | opt->len = len; | |
2154 | ||
2155 | switch (len) { | |
2156 | case 1: | |
2157 | *((u8 *) opt->val) = val; | |
2158 | break; | |
2159 | ||
2160 | case 2: | |
8e036fc3 | 2161 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
2162 | break; |
2163 | ||
2164 | case 4: | |
8e036fc3 | 2165 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
2166 | break; |
2167 | ||
2168 | default: | |
2169 | memcpy(opt->val, (void *) val, len); | |
2170 | break; | |
2171 | } | |
2172 | ||
2173 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
2174 | } | |
2175 | ||
0565c1c2 GP |
2176 | static inline void l2cap_ertm_init(struct sock *sk) |
2177 | { | |
2178 | l2cap_pi(sk)->expected_ack_seq = 0; | |
2179 | l2cap_pi(sk)->unacked_frames = 0; | |
2180 | l2cap_pi(sk)->buffer_seq = 0; | |
2181 | l2cap_pi(sk)->num_to_ack = 0; | |
2182 | ||
2183 | setup_timer(&l2cap_pi(sk)->retrans_timer, | |
2184 | l2cap_retrans_timeout, (unsigned long) sk); | |
2185 | setup_timer(&l2cap_pi(sk)->monitor_timer, | |
2186 | l2cap_monitor_timeout, (unsigned long) sk); | |
2187 | ||
2188 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
2189 | } | |
2190 | ||
f2fcfcd6 GP |
2191 | static int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
2192 | { | |
2193 | u32 local_feat_mask = l2cap_feat_mask; | |
2194 | if (enable_ertm) | |
6840ed07 | 2195 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
f2fcfcd6 GP |
2196 | |
2197 | switch (mode) { | |
2198 | case L2CAP_MODE_ERTM: | |
2199 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; | |
2200 | case L2CAP_MODE_STREAMING: | |
2201 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; | |
2202 | default: | |
2203 | return 0x00; | |
2204 | } | |
2205 | } | |
2206 | ||
2207 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) | |
2208 | { | |
2209 | switch (mode) { | |
2210 | case L2CAP_MODE_STREAMING: | |
2211 | case L2CAP_MODE_ERTM: | |
2212 | if (l2cap_mode_supported(mode, remote_feat_mask)) | |
2213 | return mode; | |
2214 | /* fall through */ | |
2215 | default: | |
2216 | return L2CAP_MODE_BASIC; | |
2217 | } | |
2218 | } | |
2219 | ||
1da177e4 LT |
2220 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
2221 | { | |
2222 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2223 | struct l2cap_conf_req *req = data; | |
a0e55a32 | 2224 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
1da177e4 LT |
2225 | void *ptr = req->data; |
2226 | ||
2227 | BT_DBG("sk %p", sk); | |
2228 | ||
f2fcfcd6 GP |
2229 | if (pi->num_conf_req || pi->num_conf_rsp) |
2230 | goto done; | |
2231 | ||
2232 | switch (pi->mode) { | |
2233 | case L2CAP_MODE_STREAMING: | |
2234 | case L2CAP_MODE_ERTM: | |
2235 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; | |
22121fc9 GP |
2236 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) |
2237 | l2cap_send_disconn_req(pi->conn, sk); | |
f2fcfcd6 GP |
2238 | break; |
2239 | default: | |
2240 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2241 | break; | |
2242 | } | |
2243 | ||
2244 | done: | |
65c7c491 MH |
2245 | switch (pi->mode) { |
2246 | case L2CAP_MODE_BASIC: | |
2247 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
2248 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
2249 | break; | |
2250 | ||
2251 | case L2CAP_MODE_ERTM: | |
2252 | rfc.mode = L2CAP_MODE_ERTM; | |
f2fcfcd6 | 2253 | rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW; |
e90bac06 | 2254 | rfc.max_transmit = L2CAP_DEFAULT_MAX_TX; |
f2fcfcd6 GP |
2255 | rfc.retrans_timeout = 0; |
2256 | rfc.monitor_timeout = 0; | |
c74e560c | 2257 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
f2fcfcd6 GP |
2258 | |
2259 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2260 | sizeof(rfc), (unsigned long) &rfc); | |
fcc203c3 GP |
2261 | |
2262 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) | |
2263 | break; | |
2264 | ||
2265 | if (pi->fcs == L2CAP_FCS_NONE || | |
2266 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2267 | pi->fcs = L2CAP_FCS_NONE; | |
2268 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2269 | } | |
f2fcfcd6 GP |
2270 | break; |
2271 | ||
2272 | case L2CAP_MODE_STREAMING: | |
2273 | rfc.mode = L2CAP_MODE_STREAMING; | |
2274 | rfc.txwin_size = 0; | |
2275 | rfc.max_transmit = 0; | |
2276 | rfc.retrans_timeout = 0; | |
2277 | rfc.monitor_timeout = 0; | |
c74e560c | 2278 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
65c7c491 MH |
2279 | |
2280 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2281 | sizeof(rfc), (unsigned long) &rfc); | |
fcc203c3 GP |
2282 | |
2283 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) | |
2284 | break; | |
2285 | ||
2286 | if (pi->fcs == L2CAP_FCS_NONE || | |
2287 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2288 | pi->fcs = L2CAP_FCS_NONE; | |
2289 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2290 | } | |
65c7c491 MH |
2291 | break; |
2292 | } | |
1da177e4 LT |
2293 | |
2294 | /* FIXME: Need actual value of the flush timeout */ | |
2295 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
2296 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
2297 | ||
aca3192c YH |
2298 | req->dcid = cpu_to_le16(pi->dcid); |
2299 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
2300 | |
2301 | return ptr - data; | |
2302 | } | |
2303 | ||
5dee9e7c | 2304 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
2305 | { |
2306 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
2307 | struct l2cap_conf_rsp *rsp = data; |
2308 | void *ptr = rsp->data; | |
2309 | void *req = pi->conf_req; | |
2310 | int len = pi->conf_len; | |
2311 | int type, hint, olen; | |
2312 | unsigned long val; | |
6464f35f | 2313 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 2314 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 2315 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 2316 | |
5dee9e7c | 2317 | BT_DBG("sk %p", sk); |
820ae1b8 | 2318 | |
5dee9e7c MH |
2319 | while (len >= L2CAP_CONF_OPT_SIZE) { |
2320 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 2321 | |
589d2746 | 2322 | hint = type & L2CAP_CONF_HINT; |
47ec1dcd | 2323 | type &= L2CAP_CONF_MASK; |
5dee9e7c MH |
2324 | |
2325 | switch (type) { | |
2326 | case L2CAP_CONF_MTU: | |
861d6882 | 2327 | mtu = val; |
5dee9e7c MH |
2328 | break; |
2329 | ||
2330 | case L2CAP_CONF_FLUSH_TO: | |
2331 | pi->flush_to = val; | |
2332 | break; | |
2333 | ||
2334 | case L2CAP_CONF_QOS: | |
2335 | break; | |
2336 | ||
6464f35f MH |
2337 | case L2CAP_CONF_RFC: |
2338 | if (olen == sizeof(rfc)) | |
2339 | memcpy(&rfc, (void *) val, olen); | |
2340 | break; | |
2341 | ||
fcc203c3 GP |
2342 | case L2CAP_CONF_FCS: |
2343 | if (val == L2CAP_FCS_NONE) | |
2344 | pi->conf_state |= L2CAP_CONF_NO_FCS_RECV; | |
2345 | ||
2346 | break; | |
2347 | ||
5dee9e7c MH |
2348 | default: |
2349 | if (hint) | |
2350 | break; | |
2351 | ||
2352 | result = L2CAP_CONF_UNKNOWN; | |
2353 | *((u8 *) ptr++) = type; | |
2354 | break; | |
2355 | } | |
2356 | } | |
2357 | ||
f2fcfcd6 GP |
2358 | if (pi->num_conf_rsp || pi->num_conf_req) |
2359 | goto done; | |
2360 | ||
2361 | switch (pi->mode) { | |
2362 | case L2CAP_MODE_STREAMING: | |
2363 | case L2CAP_MODE_ERTM: | |
2364 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; | |
2365 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) | |
2366 | return -ECONNREFUSED; | |
2367 | break; | |
2368 | default: | |
2369 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2370 | break; | |
2371 | } | |
2372 | ||
2373 | done: | |
2374 | if (pi->mode != rfc.mode) { | |
2375 | result = L2CAP_CONF_UNACCEPT; | |
2376 | rfc.mode = pi->mode; | |
2377 | ||
2378 | if (pi->num_conf_rsp == 1) | |
2379 | return -ECONNREFUSED; | |
2380 | ||
2381 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2382 | sizeof(rfc), (unsigned long) &rfc); | |
2383 | } | |
2384 | ||
2385 | ||
5dee9e7c MH |
2386 | if (result == L2CAP_CONF_SUCCESS) { |
2387 | /* Configure output options and let the other side know | |
2388 | * which ones we don't like. */ | |
2389 | ||
f2fcfcd6 GP |
2390 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
2391 | result = L2CAP_CONF_UNACCEPT; | |
2392 | else { | |
2393 | pi->omtu = mtu; | |
2394 | pi->conf_state |= L2CAP_CONF_MTU_DONE; | |
2395 | } | |
2396 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
6464f35f | 2397 | |
f2fcfcd6 GP |
2398 | switch (rfc.mode) { |
2399 | case L2CAP_MODE_BASIC: | |
2400 | pi->fcs = L2CAP_FCS_NONE; | |
2401 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
2402 | break; | |
2403 | ||
2404 | case L2CAP_MODE_ERTM: | |
2405 | pi->remote_tx_win = rfc.txwin_size; | |
2406 | pi->remote_max_tx = rfc.max_transmit; | |
2407 | pi->max_pdu_size = rfc.max_pdu_size; | |
2408 | ||
2409 | rfc.retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; | |
2410 | rfc.monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; | |
2411 | ||
2412 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2413 | |
2414 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2415 | sizeof(rfc), (unsigned long) &rfc); | |
2416 | ||
f2fcfcd6 GP |
2417 | break; |
2418 | ||
2419 | case L2CAP_MODE_STREAMING: | |
2420 | pi->remote_tx_win = rfc.txwin_size; | |
2421 | pi->max_pdu_size = rfc.max_pdu_size; | |
2422 | ||
2423 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2424 | |
2425 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2426 | sizeof(rfc), (unsigned long) &rfc); | |
2427 | ||
f2fcfcd6 GP |
2428 | break; |
2429 | ||
2430 | default: | |
5dee9e7c | 2431 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 2432 | |
6464f35f | 2433 | memset(&rfc, 0, sizeof(rfc)); |
f2fcfcd6 GP |
2434 | rfc.mode = pi->mode; |
2435 | } | |
6464f35f | 2436 | |
f2fcfcd6 GP |
2437 | if (result == L2CAP_CONF_SUCCESS) |
2438 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
2439 | } | |
5dee9e7c MH |
2440 | rsp->scid = cpu_to_le16(pi->dcid); |
2441 | rsp->result = cpu_to_le16(result); | |
2442 | rsp->flags = cpu_to_le16(0x0000); | |
2443 | ||
2444 | return ptr - data; | |
1da177e4 LT |
2445 | } |
2446 | ||
f2fcfcd6 GP |
2447 | static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result) |
2448 | { | |
2449 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2450 | struct l2cap_conf_req *req = data; | |
2451 | void *ptr = req->data; | |
2452 | int type, olen; | |
2453 | unsigned long val; | |
2454 | struct l2cap_conf_rfc rfc; | |
2455 | ||
2456 | BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data); | |
2457 | ||
2458 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2459 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2460 | ||
2461 | switch (type) { | |
2462 | case L2CAP_CONF_MTU: | |
2463 | if (val < L2CAP_DEFAULT_MIN_MTU) { | |
2464 | *result = L2CAP_CONF_UNACCEPT; | |
2465 | pi->omtu = L2CAP_DEFAULT_MIN_MTU; | |
2466 | } else | |
2467 | pi->omtu = val; | |
2468 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
2469 | break; | |
2470 | ||
2471 | case L2CAP_CONF_FLUSH_TO: | |
2472 | pi->flush_to = val; | |
2473 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, | |
2474 | 2, pi->flush_to); | |
2475 | break; | |
2476 | ||
2477 | case L2CAP_CONF_RFC: | |
2478 | if (olen == sizeof(rfc)) | |
2479 | memcpy(&rfc, (void *)val, olen); | |
2480 | ||
2481 | if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) && | |
2482 | rfc.mode != pi->mode) | |
2483 | return -ECONNREFUSED; | |
2484 | ||
2485 | pi->mode = rfc.mode; | |
2486 | pi->fcs = 0; | |
2487 | ||
2488 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2489 | sizeof(rfc), (unsigned long) &rfc); | |
2490 | break; | |
2491 | } | |
2492 | } | |
2493 | ||
2494 | if (*result == L2CAP_CONF_SUCCESS) { | |
2495 | switch (rfc.mode) { | |
2496 | case L2CAP_MODE_ERTM: | |
2497 | pi->remote_tx_win = rfc.txwin_size; | |
2498 | pi->retrans_timeout = rfc.retrans_timeout; | |
2499 | pi->monitor_timeout = rfc.monitor_timeout; | |
2500 | pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size); | |
2501 | break; | |
2502 | case L2CAP_MODE_STREAMING: | |
2503 | pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size); | |
2504 | break; | |
2505 | } | |
2506 | } | |
2507 | ||
2508 | req->dcid = cpu_to_le16(pi->dcid); | |
2509 | req->flags = cpu_to_le16(0x0000); | |
2510 | ||
2511 | return ptr - data; | |
2512 | } | |
2513 | ||
5dee9e7c | 2514 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
2515 | { |
2516 | struct l2cap_conf_rsp *rsp = data; | |
2517 | void *ptr = rsp->data; | |
1da177e4 | 2518 | |
5dee9e7c | 2519 | BT_DBG("sk %p", sk); |
1da177e4 | 2520 | |
aca3192c | 2521 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 2522 | rsp->result = cpu_to_le16(result); |
aca3192c | 2523 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
2524 | |
2525 | return ptr - data; | |
2526 | } | |
2527 | ||
4e8402a3 MH |
2528 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2529 | { | |
2530 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
2531 | ||
2532 | if (rej->reason != 0x0000) | |
2533 | return 0; | |
2534 | ||
2535 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
2536 | cmd->ident == conn->info_ident) { | |
4e8402a3 | 2537 | del_timer(&conn->info_timer); |
984947dc MH |
2538 | |
2539 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
e1027a7c | 2540 | conn->info_ident = 0; |
984947dc | 2541 | |
4e8402a3 MH |
2542 | l2cap_conn_start(conn); |
2543 | } | |
2544 | ||
2545 | return 0; | |
2546 | } | |
2547 | ||
1da177e4 LT |
2548 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2549 | { | |
2550 | struct l2cap_chan_list *list = &conn->chan_list; | |
2551 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
2552 | struct l2cap_conn_rsp rsp; | |
2553 | struct sock *sk, *parent; | |
e7c29cb1 | 2554 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
2555 | |
2556 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 2557 | __le16 psm = req->psm; |
1da177e4 LT |
2558 | |
2559 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
2560 | ||
2561 | /* Check if we have socket listening on psm */ | |
2562 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
2563 | if (!parent) { | |
2564 | result = L2CAP_CR_BAD_PSM; | |
2565 | goto sendresp; | |
2566 | } | |
2567 | ||
e7c29cb1 MH |
2568 | /* Check if the ACL is secure enough (if not SDP) */ |
2569 | if (psm != cpu_to_le16(0x0001) && | |
2570 | !hci_conn_check_link_mode(conn->hcon)) { | |
2950f21a | 2571 | conn->disc_reason = 0x05; |
e7c29cb1 MH |
2572 | result = L2CAP_CR_SEC_BLOCK; |
2573 | goto response; | |
2574 | } | |
2575 | ||
1da177e4 LT |
2576 | result = L2CAP_CR_NO_MEM; |
2577 | ||
2578 | /* Check for backlog size */ | |
2579 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 2580 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
2581 | goto response; |
2582 | } | |
2583 | ||
3b1e0a65 | 2584 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
2585 | if (!sk) |
2586 | goto response; | |
2587 | ||
fd1278d7 | 2588 | write_lock_bh(&list->lock); |
1da177e4 LT |
2589 | |
2590 | /* Check if we already have channel with that dcid */ | |
2591 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 2592 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2593 | sock_set_flag(sk, SOCK_ZAPPED); |
2594 | l2cap_sock_kill(sk); | |
2595 | goto response; | |
2596 | } | |
2597 | ||
2598 | hci_conn_hold(conn->hcon); | |
2599 | ||
2600 | l2cap_sock_init(sk, parent); | |
2601 | bacpy(&bt_sk(sk)->src, conn->src); | |
2602 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
2603 | l2cap_pi(sk)->psm = psm; | |
2604 | l2cap_pi(sk)->dcid = scid; | |
2605 | ||
2606 | __l2cap_chan_add(conn, sk, parent); | |
2607 | dcid = l2cap_pi(sk)->scid; | |
2608 | ||
2609 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
2610 | ||
1da177e4 LT |
2611 | l2cap_pi(sk)->ident = cmd->ident; |
2612 | ||
984947dc | 2613 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
2af6b9d5 | 2614 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
2615 | if (bt_sk(sk)->defer_setup) { |
2616 | sk->sk_state = BT_CONNECT2; | |
2617 | result = L2CAP_CR_PEND; | |
2618 | status = L2CAP_CS_AUTHOR_PEND; | |
2619 | parent->sk_data_ready(parent, 0); | |
2620 | } else { | |
2621 | sk->sk_state = BT_CONFIG; | |
2622 | result = L2CAP_CR_SUCCESS; | |
2623 | status = L2CAP_CS_NO_INFO; | |
2624 | } | |
79d554a6 MH |
2625 | } else { |
2626 | sk->sk_state = BT_CONNECT2; | |
2627 | result = L2CAP_CR_PEND; | |
2628 | status = L2CAP_CS_AUTHEN_PEND; | |
2629 | } | |
2630 | } else { | |
2631 | sk->sk_state = BT_CONNECT2; | |
2632 | result = L2CAP_CR_PEND; | |
2633 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
2634 | } |
2635 | ||
fd1278d7 | 2636 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2637 | |
2638 | response: | |
2639 | bh_unlock_sock(parent); | |
2640 | ||
2641 | sendresp: | |
aca3192c YH |
2642 | rsp.scid = cpu_to_le16(scid); |
2643 | rsp.dcid = cpu_to_le16(dcid); | |
2644 | rsp.result = cpu_to_le16(result); | |
2645 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 2646 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
2647 | |
2648 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
2649 | struct l2cap_info_req info; | |
2650 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2651 | ||
2652 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
2653 | conn->info_ident = l2cap_get_ident(conn); | |
2654 | ||
2655 | mod_timer(&conn->info_timer, jiffies + | |
2656 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
2657 | ||
2658 | l2cap_send_cmd(conn, conn->info_ident, | |
2659 | L2CAP_INFO_REQ, sizeof(info), &info); | |
2660 | } | |
2661 | ||
1da177e4 LT |
2662 | return 0; |
2663 | } | |
2664 | ||
2665 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2666 | { | |
2667 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
2668 | u16 scid, dcid, result, status; | |
2669 | struct sock *sk; | |
2670 | u8 req[128]; | |
2671 | ||
2672 | scid = __le16_to_cpu(rsp->scid); | |
2673 | dcid = __le16_to_cpu(rsp->dcid); | |
2674 | result = __le16_to_cpu(rsp->result); | |
2675 | status = __le16_to_cpu(rsp->status); | |
2676 | ||
2677 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
2678 | ||
2679 | if (scid) { | |
af05b30b GP |
2680 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2681 | if (!sk) | |
1da177e4 LT |
2682 | return 0; |
2683 | } else { | |
af05b30b GP |
2684 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
2685 | if (!sk) | |
1da177e4 LT |
2686 | return 0; |
2687 | } | |
2688 | ||
2689 | switch (result) { | |
2690 | case L2CAP_CR_SUCCESS: | |
2691 | sk->sk_state = BT_CONFIG; | |
2692 | l2cap_pi(sk)->ident = 0; | |
2693 | l2cap_pi(sk)->dcid = dcid; | |
2694 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
2695 | ||
6a8d3010 MH |
2696 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
2697 | ||
1da177e4 LT |
2698 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
2699 | l2cap_build_conf_req(sk, req), req); | |
f2fcfcd6 | 2700 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
2701 | break; |
2702 | ||
2703 | case L2CAP_CR_PEND: | |
6a8d3010 | 2704 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 LT |
2705 | break; |
2706 | ||
2707 | default: | |
2708 | l2cap_chan_del(sk, ECONNREFUSED); | |
2709 | break; | |
2710 | } | |
2711 | ||
2712 | bh_unlock_sock(sk); | |
2713 | return 0; | |
2714 | } | |
2715 | ||
88219a0f | 2716 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
2717 | { |
2718 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
2719 | u16 dcid, flags; | |
2720 | u8 rsp[64]; | |
2721 | struct sock *sk; | |
5dee9e7c | 2722 | int len; |
1da177e4 LT |
2723 | |
2724 | dcid = __le16_to_cpu(req->dcid); | |
2725 | flags = __le16_to_cpu(req->flags); | |
2726 | ||
2727 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
2728 | ||
af05b30b GP |
2729 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
2730 | if (!sk) | |
1da177e4 LT |
2731 | return -ENOENT; |
2732 | ||
354f60a9 MH |
2733 | if (sk->sk_state == BT_DISCONN) |
2734 | goto unlock; | |
2735 | ||
5dee9e7c | 2736 | /* Reject if config buffer is too small. */ |
88219a0f | 2737 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
2738 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
2739 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
2740 | l2cap_build_conf_rsp(sk, rsp, | |
2741 | L2CAP_CONF_REJECT, flags), rsp); | |
2742 | goto unlock; | |
2743 | } | |
2744 | ||
2745 | /* Store config. */ | |
2746 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
2747 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
2748 | |
2749 | if (flags & 0x0001) { | |
2750 | /* Incomplete config. Send empty response. */ | |
2751 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
2752 | l2cap_build_conf_rsp(sk, rsp, |
2753 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
2754 | goto unlock; |
2755 | } | |
2756 | ||
2757 | /* Complete config. */ | |
5dee9e7c | 2758 | len = l2cap_parse_conf_req(sk, rsp); |
f2fcfcd6 | 2759 | if (len < 0) { |
22121fc9 | 2760 | l2cap_send_disconn_req(conn, sk); |
1da177e4 | 2761 | goto unlock; |
f2fcfcd6 | 2762 | } |
1da177e4 | 2763 | |
5dee9e7c | 2764 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
f2fcfcd6 | 2765 | l2cap_pi(sk)->num_conf_rsp++; |
5dee9e7c | 2766 | |
5dee9e7c MH |
2767 | /* Reset config buffer. */ |
2768 | l2cap_pi(sk)->conf_len = 0; | |
2769 | ||
876d9484 MH |
2770 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
2771 | goto unlock; | |
2772 | ||
1da177e4 | 2773 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
f64f9e71 JP |
2774 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
2775 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
fcc203c3 GP |
2776 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
2777 | ||
1da177e4 | 2778 | sk->sk_state = BT_CONNECTED; |
e90bac06 | 2779 | |
0565c1c2 GP |
2780 | l2cap_pi(sk)->next_tx_seq = 0; |
2781 | l2cap_pi(sk)->expected_tx_seq = 0; | |
1c2acffb | 2782 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
2783 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
2784 | l2cap_ertm_init(sk); | |
2785 | ||
1da177e4 | 2786 | l2cap_chan_ready(sk); |
876d9484 MH |
2787 | goto unlock; |
2788 | } | |
2789 | ||
2790 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 2791 | u8 buf[64]; |
1da177e4 | 2792 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 2793 | l2cap_build_conf_req(sk, buf), buf); |
f2fcfcd6 | 2794 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
2795 | } |
2796 | ||
2797 | unlock: | |
2798 | bh_unlock_sock(sk); | |
2799 | return 0; | |
2800 | } | |
2801 | ||
2802 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2803 | { | |
2804 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
2805 | u16 scid, flags, result; | |
2806 | struct sock *sk; | |
2807 | ||
2808 | scid = __le16_to_cpu(rsp->scid); | |
2809 | flags = __le16_to_cpu(rsp->flags); | |
2810 | result = __le16_to_cpu(rsp->result); | |
2811 | ||
af05b30b GP |
2812 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
2813 | scid, flags, result); | |
1da177e4 | 2814 | |
af05b30b GP |
2815 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2816 | if (!sk) | |
1da177e4 LT |
2817 | return 0; |
2818 | ||
2819 | switch (result) { | |
2820 | case L2CAP_CONF_SUCCESS: | |
2821 | break; | |
2822 | ||
2823 | case L2CAP_CONF_UNACCEPT: | |
f2fcfcd6 GP |
2824 | if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
2825 | int len = cmd->len - sizeof(*rsp); | |
2826 | char req[64]; | |
2827 | ||
2828 | /* throw out any old stored conf requests */ | |
2829 | result = L2CAP_CONF_SUCCESS; | |
2830 | len = l2cap_parse_conf_rsp(sk, rsp->data, | |
2831 | len, req, &result); | |
2832 | if (len < 0) { | |
22121fc9 | 2833 | l2cap_send_disconn_req(conn, sk); |
f2fcfcd6 GP |
2834 | goto done; |
2835 | } | |
2836 | ||
2837 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
2838 | L2CAP_CONF_REQ, len, req); | |
2839 | l2cap_pi(sk)->num_conf_req++; | |
2840 | if (result != L2CAP_CONF_SUCCESS) | |
2841 | goto done; | |
2842 | break; | |
1da177e4 LT |
2843 | } |
2844 | ||
8e87d142 | 2845 | default: |
1da177e4 | 2846 | sk->sk_state = BT_DISCONN; |
b1235d79 | 2847 | sk->sk_err = ECONNRESET; |
1da177e4 | 2848 | l2cap_sock_set_timer(sk, HZ * 5); |
22121fc9 | 2849 | l2cap_send_disconn_req(conn, sk); |
1da177e4 LT |
2850 | goto done; |
2851 | } | |
2852 | ||
2853 | if (flags & 0x01) | |
2854 | goto done; | |
2855 | ||
1da177e4 LT |
2856 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
2857 | ||
2858 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
f64f9e71 JP |
2859 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
2860 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
fcc203c3 GP |
2861 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
2862 | ||
1da177e4 | 2863 | sk->sk_state = BT_CONNECTED; |
0565c1c2 | 2864 | l2cap_pi(sk)->next_tx_seq = 0; |
1c2acffb | 2865 | l2cap_pi(sk)->expected_tx_seq = 0; |
1c2acffb | 2866 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
2867 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
2868 | l2cap_ertm_init(sk); | |
2869 | ||
1da177e4 LT |
2870 | l2cap_chan_ready(sk); |
2871 | } | |
2872 | ||
2873 | done: | |
2874 | bh_unlock_sock(sk); | |
2875 | return 0; | |
2876 | } | |
2877 | ||
2878 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2879 | { | |
2880 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
2881 | struct l2cap_disconn_rsp rsp; | |
2882 | u16 dcid, scid; | |
2883 | struct sock *sk; | |
2884 | ||
2885 | scid = __le16_to_cpu(req->scid); | |
2886 | dcid = __le16_to_cpu(req->dcid); | |
2887 | ||
2888 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
2889 | ||
af05b30b GP |
2890 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
2891 | if (!sk) | |
1da177e4 LT |
2892 | return 0; |
2893 | ||
aca3192c YH |
2894 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
2895 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
2896 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
2897 | ||
2898 | sk->sk_shutdown = SHUTDOWN_MASK; | |
2899 | ||
1c2acffb | 2900 | skb_queue_purge(TX_QUEUE(sk)); |
0565c1c2 GP |
2901 | |
2902 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
2903 | skb_queue_purge(SREJ_QUEUE(sk)); | |
2904 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
2905 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
2906 | } | |
1c2acffb | 2907 | |
1da177e4 LT |
2908 | l2cap_chan_del(sk, ECONNRESET); |
2909 | bh_unlock_sock(sk); | |
2910 | ||
2911 | l2cap_sock_kill(sk); | |
2912 | return 0; | |
2913 | } | |
2914 | ||
2915 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2916 | { | |
2917 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
2918 | u16 dcid, scid; | |
2919 | struct sock *sk; | |
2920 | ||
2921 | scid = __le16_to_cpu(rsp->scid); | |
2922 | dcid = __le16_to_cpu(rsp->dcid); | |
2923 | ||
2924 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
2925 | ||
af05b30b GP |
2926 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2927 | if (!sk) | |
1da177e4 LT |
2928 | return 0; |
2929 | ||
1c2acffb | 2930 | skb_queue_purge(TX_QUEUE(sk)); |
0565c1c2 GP |
2931 | |
2932 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
2933 | skb_queue_purge(SREJ_QUEUE(sk)); | |
2934 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
2935 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
2936 | } | |
1c2acffb | 2937 | |
1da177e4 LT |
2938 | l2cap_chan_del(sk, 0); |
2939 | bh_unlock_sock(sk); | |
2940 | ||
2941 | l2cap_sock_kill(sk); | |
2942 | return 0; | |
2943 | } | |
2944 | ||
2945 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2946 | { | |
2947 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
2948 | u16 type; |
2949 | ||
2950 | type = __le16_to_cpu(req->type); | |
2951 | ||
2952 | BT_DBG("type 0x%4.4x", type); | |
2953 | ||
f0709e03 MH |
2954 | if (type == L2CAP_IT_FEAT_MASK) { |
2955 | u8 buf[8]; | |
44dd46de | 2956 | u32 feat_mask = l2cap_feat_mask; |
f0709e03 MH |
2957 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
2958 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2959 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
44dd46de | 2960 | if (enable_ertm) |
fcc203c3 GP |
2961 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
2962 | | L2CAP_FEAT_FCS; | |
1b7bf4ed | 2963 | put_unaligned_le32(feat_mask, rsp->data); |
f0709e03 MH |
2964 | l2cap_send_cmd(conn, cmd->ident, |
2965 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
e1027a7c MH |
2966 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
2967 | u8 buf[12]; | |
2968 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
2969 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
2970 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
2971 | memcpy(buf + 4, l2cap_fixed_chan, 8); | |
2972 | l2cap_send_cmd(conn, cmd->ident, | |
2973 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
f0709e03 MH |
2974 | } else { |
2975 | struct l2cap_info_rsp rsp; | |
2976 | rsp.type = cpu_to_le16(type); | |
2977 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
2978 | l2cap_send_cmd(conn, cmd->ident, | |
2979 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
2980 | } | |
1da177e4 LT |
2981 | |
2982 | return 0; | |
2983 | } | |
2984 | ||
2985 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2986 | { | |
2987 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
2988 | u16 type, result; | |
2989 | ||
2990 | type = __le16_to_cpu(rsp->type); | |
2991 | result = __le16_to_cpu(rsp->result); | |
2992 | ||
2993 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
2994 | ||
4e8402a3 MH |
2995 | del_timer(&conn->info_timer); |
2996 | ||
984947dc | 2997 | if (type == L2CAP_IT_FEAT_MASK) { |
83985319 | 2998 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 | 2999 | |
47ec1dcd | 3000 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
e1027a7c MH |
3001 | struct l2cap_info_req req; |
3002 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
3003 | ||
3004 | conn->info_ident = l2cap_get_ident(conn); | |
3005 | ||
3006 | l2cap_send_cmd(conn, conn->info_ident, | |
3007 | L2CAP_INFO_REQ, sizeof(req), &req); | |
3008 | } else { | |
3009 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
3010 | conn->info_ident = 0; | |
3011 | ||
3012 | l2cap_conn_start(conn); | |
3013 | } | |
3014 | } else if (type == L2CAP_IT_FIXED_CHAN) { | |
984947dc | 3015 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 3016 | conn->info_ident = 0; |
984947dc MH |
3017 | |
3018 | l2cap_conn_start(conn); | |
3019 | } | |
4e8402a3 | 3020 | |
1da177e4 LT |
3021 | return 0; |
3022 | } | |
3023 | ||
3024 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
3025 | { | |
3026 | u8 *data = skb->data; | |
3027 | int len = skb->len; | |
3028 | struct l2cap_cmd_hdr cmd; | |
3029 | int err = 0; | |
3030 | ||
3031 | l2cap_raw_recv(conn, skb); | |
3032 | ||
3033 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 3034 | u16 cmd_len; |
1da177e4 LT |
3035 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
3036 | data += L2CAP_CMD_HDR_SIZE; | |
3037 | len -= L2CAP_CMD_HDR_SIZE; | |
3038 | ||
88219a0f | 3039 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 3040 | |
88219a0f | 3041 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 3042 | |
88219a0f | 3043 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
3044 | BT_DBG("corrupted command"); |
3045 | break; | |
3046 | } | |
3047 | ||
3048 | switch (cmd.code) { | |
3049 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 3050 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
3051 | break; |
3052 | ||
3053 | case L2CAP_CONN_REQ: | |
3054 | err = l2cap_connect_req(conn, &cmd, data); | |
3055 | break; | |
3056 | ||
3057 | case L2CAP_CONN_RSP: | |
3058 | err = l2cap_connect_rsp(conn, &cmd, data); | |
3059 | break; | |
3060 | ||
3061 | case L2CAP_CONF_REQ: | |
88219a0f | 3062 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
3063 | break; |
3064 | ||
3065 | case L2CAP_CONF_RSP: | |
3066 | err = l2cap_config_rsp(conn, &cmd, data); | |
3067 | break; | |
3068 | ||
3069 | case L2CAP_DISCONN_REQ: | |
3070 | err = l2cap_disconnect_req(conn, &cmd, data); | |
3071 | break; | |
3072 | ||
3073 | case L2CAP_DISCONN_RSP: | |
3074 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
3075 | break; | |
3076 | ||
3077 | case L2CAP_ECHO_REQ: | |
88219a0f | 3078 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
3079 | break; |
3080 | ||
3081 | case L2CAP_ECHO_RSP: | |
3082 | break; | |
3083 | ||
3084 | case L2CAP_INFO_REQ: | |
3085 | err = l2cap_information_req(conn, &cmd, data); | |
3086 | break; | |
3087 | ||
3088 | case L2CAP_INFO_RSP: | |
3089 | err = l2cap_information_rsp(conn, &cmd, data); | |
3090 | break; | |
3091 | ||
3092 | default: | |
3093 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
3094 | err = -EINVAL; | |
3095 | break; | |
3096 | } | |
3097 | ||
3098 | if (err) { | |
3099 | struct l2cap_cmd_rej rej; | |
3100 | BT_DBG("error %d", err); | |
3101 | ||
3102 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 3103 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
3104 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
3105 | } | |
3106 | ||
88219a0f AV |
3107 | data += cmd_len; |
3108 | len -= cmd_len; | |
1da177e4 LT |
3109 | } |
3110 | ||
3111 | kfree_skb(skb); | |
3112 | } | |
3113 | ||
fcc203c3 GP |
3114 | static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb) |
3115 | { | |
3116 | u16 our_fcs, rcv_fcs; | |
3117 | int hdr_size = L2CAP_HDR_SIZE + 2; | |
3118 | ||
3119 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
3120 | skb_trim(skb, skb->len - 2); | |
3121 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); | |
3122 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); | |
3123 | ||
3124 | if (our_fcs != rcv_fcs) | |
3125 | return -EINVAL; | |
3126 | } | |
3127 | return 0; | |
3128 | } | |
3129 | ||
8f17154f GP |
3130 | static void l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar) |
3131 | { | |
3132 | struct sk_buff *next_skb; | |
3133 | ||
3134 | bt_cb(skb)->tx_seq = tx_seq; | |
3135 | bt_cb(skb)->sar = sar; | |
3136 | ||
3137 | next_skb = skb_peek(SREJ_QUEUE(sk)); | |
3138 | if (!next_skb) { | |
3139 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
3140 | return; | |
3141 | } | |
3142 | ||
3143 | do { | |
3144 | if (bt_cb(next_skb)->tx_seq > tx_seq) { | |
3145 | __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb); | |
3146 | return; | |
3147 | } | |
3148 | ||
3149 | if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb)) | |
3150 | break; | |
3151 | ||
3152 | } while((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb))); | |
3153 | ||
3154 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
3155 | } | |
3156 | ||
c74e560c GP |
3157 | static int l2cap_sar_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
3158 | { | |
3159 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3160 | struct sk_buff *_skb; | |
3161 | int err = -EINVAL; | |
3162 | ||
3163 | switch (control & L2CAP_CTRL_SAR) { | |
3164 | case L2CAP_SDU_UNSEGMENTED: | |
3165 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3166 | kfree_skb(pi->sdu); | |
3167 | break; | |
3168 | } | |
3169 | ||
3170 | err = sock_queue_rcv_skb(sk, skb); | |
3171 | if (!err) | |
3172 | return 0; | |
3173 | ||
3174 | break; | |
3175 | ||
3176 | case L2CAP_SDU_START: | |
3177 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3178 | kfree_skb(pi->sdu); | |
3179 | break; | |
3180 | } | |
3181 | ||
3182 | pi->sdu_len = get_unaligned_le16(skb->data); | |
3183 | skb_pull(skb, 2); | |
3184 | ||
3185 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); | |
3186 | if (!pi->sdu) { | |
3187 | err = -ENOMEM; | |
3188 | break; | |
3189 | } | |
3190 | ||
3191 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3192 | ||
3193 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3194 | pi->partial_sdu_len = skb->len; | |
3195 | err = 0; | |
3196 | break; | |
3197 | ||
3198 | case L2CAP_SDU_CONTINUE: | |
3199 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3200 | break; | |
3201 | ||
3202 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3203 | ||
3204 | pi->partial_sdu_len += skb->len; | |
3205 | if (pi->partial_sdu_len > pi->sdu_len) | |
3206 | kfree_skb(pi->sdu); | |
3207 | else | |
3208 | err = 0; | |
3209 | ||
3210 | break; | |
3211 | ||
3212 | case L2CAP_SDU_END: | |
3213 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3214 | break; | |
3215 | ||
3216 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3217 | ||
3218 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
3219 | pi->partial_sdu_len += skb->len; | |
3220 | ||
3221 | if (pi->partial_sdu_len == pi->sdu_len) { | |
3222 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
3223 | err = sock_queue_rcv_skb(sk, _skb); | |
3224 | if (err < 0) | |
3225 | kfree_skb(_skb); | |
3226 | } | |
3227 | kfree_skb(pi->sdu); | |
3228 | err = 0; | |
3229 | ||
3230 | break; | |
3231 | } | |
3232 | ||
3233 | kfree_skb(skb); | |
3234 | return err; | |
3235 | } | |
3236 | ||
8f17154f GP |
3237 | static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq) |
3238 | { | |
3239 | struct sk_buff *skb; | |
3240 | u16 control = 0; | |
3241 | ||
3242 | while((skb = skb_peek(SREJ_QUEUE(sk)))) { | |
3243 | if (bt_cb(skb)->tx_seq != tx_seq) | |
3244 | break; | |
3245 | ||
3246 | skb = skb_dequeue(SREJ_QUEUE(sk)); | |
3247 | control |= bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; | |
3248 | l2cap_sar_reassembly_sdu(sk, skb, control); | |
3249 | l2cap_pi(sk)->buffer_seq_srej = | |
3250 | (l2cap_pi(sk)->buffer_seq_srej + 1) % 64; | |
3251 | tx_seq++; | |
3252 | } | |
3253 | } | |
3254 | ||
3255 | static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq) | |
3256 | { | |
3257 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3258 | struct srej_list *l, *tmp; | |
3259 | u16 control; | |
3260 | ||
3261 | list_for_each_entry_safe(l,tmp, SREJ_LIST(sk), list) { | |
3262 | if (l->tx_seq == tx_seq) { | |
3263 | list_del(&l->list); | |
3264 | kfree(l); | |
3265 | return; | |
3266 | } | |
3267 | control = L2CAP_SUPER_SELECT_REJECT; | |
3268 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3269 | l2cap_send_sframe(pi, control); | |
3270 | list_del(&l->list); | |
3271 | list_add_tail(&l->list, SREJ_LIST(sk)); | |
3272 | } | |
3273 | } | |
3274 | ||
3275 | static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) | |
3276 | { | |
3277 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3278 | struct srej_list *new; | |
3279 | u16 control; | |
3280 | ||
3281 | while (tx_seq != pi->expected_tx_seq) { | |
3282 | control = L2CAP_SUPER_SELECT_REJECT; | |
3283 | control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
ef54fd93 GP |
3284 | if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { |
3285 | control |= L2CAP_CTRL_POLL; | |
3286 | pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; | |
3287 | } | |
8f17154f GP |
3288 | l2cap_send_sframe(pi, control); |
3289 | ||
3290 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); | |
3291 | new->tx_seq = pi->expected_tx_seq++; | |
3292 | list_add_tail(&new->list, SREJ_LIST(sk)); | |
3293 | } | |
3294 | pi->expected_tx_seq++; | |
3295 | } | |
3296 | ||
1c2acffb GP |
3297 | static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
3298 | { | |
3299 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3300 | u8 tx_seq = __get_txseq(rx_control); | |
3301 | u16 tx_control = 0; | |
8f17154f | 3302 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
1c2acffb GP |
3303 | int err = 0; |
3304 | ||
3305 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
3306 | ||
8f17154f GP |
3307 | if (tx_seq == pi->expected_tx_seq) |
3308 | goto expected; | |
1c2acffb | 3309 | |
8f17154f GP |
3310 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
3311 | struct srej_list *first; | |
30afb5b2 | 3312 | |
8f17154f GP |
3313 | first = list_first_entry(SREJ_LIST(sk), |
3314 | struct srej_list, list); | |
3315 | if (tx_seq == first->tx_seq) { | |
3316 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3317 | l2cap_check_srej_gap(sk, tx_seq); | |
3318 | ||
3319 | list_del(&first->list); | |
3320 | kfree(first); | |
3321 | ||
3322 | if (list_empty(SREJ_LIST(sk))) { | |
3323 | pi->buffer_seq = pi->buffer_seq_srej; | |
3324 | pi->conn_state &= ~L2CAP_CONN_SREJ_SENT; | |
3325 | } | |
3326 | } else { | |
3327 | struct srej_list *l; | |
3328 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3329 | ||
3330 | list_for_each_entry(l, SREJ_LIST(sk), list) { | |
3331 | if (l->tx_seq == tx_seq) { | |
3332 | l2cap_resend_srejframe(sk, tx_seq); | |
3333 | return 0; | |
3334 | } | |
3335 | } | |
3336 | l2cap_send_srejframe(sk, tx_seq); | |
30afb5b2 GP |
3337 | } |
3338 | } else { | |
8f17154f | 3339 | pi->conn_state |= L2CAP_CONN_SREJ_SENT; |
1c2acffb | 3340 | |
8f17154f GP |
3341 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
3342 | pi->buffer_seq_srej = pi->buffer_seq; | |
3343 | ||
3344 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
3345 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3346 | ||
ef54fd93 GP |
3347 | pi->conn_state |= L2CAP_CONN_SEND_PBIT; |
3348 | ||
8f17154f | 3349 | l2cap_send_srejframe(sk, tx_seq); |
1c2acffb | 3350 | } |
30afb5b2 GP |
3351 | return 0; |
3352 | ||
8f17154f GP |
3353 | expected: |
3354 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
3355 | ||
3356 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { | |
3357 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3358 | return 0; | |
3359 | } | |
3360 | ||
3361 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; | |
3362 | ||
3363 | err = l2cap_sar_reassembly_sdu(sk, skb, rx_control); | |
3364 | if (err < 0) | |
3365 | return err; | |
3366 | ||
3367 | pi->num_to_ack = (pi->num_to_ack + 1) % L2CAP_DEFAULT_NUM_TO_ACK; | |
3368 | if (pi->num_to_ack == L2CAP_DEFAULT_NUM_TO_ACK - 1) { | |
3369 | tx_control |= L2CAP_SUPER_RCV_READY; | |
3370 | tx_control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3371 | l2cap_send_sframe(pi, tx_control); | |
3372 | } | |
3373 | return 0; | |
1c2acffb GP |
3374 | } |
3375 | ||
3376 | static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) | |
3377 | { | |
3378 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
8f17154f | 3379 | u8 tx_seq = __get_reqseq(rx_control); |
1c2acffb GP |
3380 | |
3381 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
3382 | ||
3383 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { | |
3384 | case L2CAP_SUPER_RCV_READY: | |
e90bac06 GP |
3385 | if (rx_control & L2CAP_CTRL_POLL) { |
3386 | u16 control = L2CAP_CTRL_FINAL; | |
ca42a613 GP |
3387 | control |= L2CAP_SUPER_RCV_READY | |
3388 | (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT); | |
e90bac06 | 3389 | l2cap_send_sframe(l2cap_pi(sk), control); |
2246b2f1 GP |
3390 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
3391 | ||
e90bac06 | 3392 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
2246b2f1 | 3393 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
ca42a613 GP |
3394 | pi->expected_ack_seq = tx_seq; |
3395 | l2cap_drop_acked_frames(sk); | |
3396 | ||
e90bac06 GP |
3397 | if (!(pi->conn_state & L2CAP_CONN_WAIT_F)) |
3398 | break; | |
3399 | ||
3400 | pi->conn_state &= ~L2CAP_CONN_WAIT_F; | |
3401 | del_timer(&pi->monitor_timer); | |
3402 | ||
3403 | if (pi->unacked_frames > 0) | |
3404 | __mod_retrans_timer(); | |
3405 | } else { | |
8f17154f | 3406 | pi->expected_ack_seq = tx_seq; |
e90bac06 | 3407 | l2cap_drop_acked_frames(sk); |
2246b2f1 | 3408 | |
f64f9e71 JP |
3409 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
3410 | (pi->unacked_frames > 0)) | |
e90bac06 | 3411 | __mod_retrans_timer(); |
2246b2f1 | 3412 | |
e90bac06 | 3413 | l2cap_ertm_send(sk); |
2246b2f1 | 3414 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
e90bac06 | 3415 | } |
1c2acffb GP |
3416 | break; |
3417 | ||
1c2acffb | 3418 | case L2CAP_SUPER_REJECT: |
2246b2f1 GP |
3419 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
3420 | ||
30afb5b2 GP |
3421 | pi->expected_ack_seq = __get_reqseq(rx_control); |
3422 | l2cap_drop_acked_frames(sk); | |
3423 | ||
3424 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
3425 | pi->next_tx_seq = pi->expected_ack_seq; | |
3426 | ||
3427 | l2cap_ertm_send(sk); | |
3428 | ||
3429 | break; | |
3430 | ||
1c2acffb | 3431 | case L2CAP_SUPER_SELECT_REJECT: |
2246b2f1 GP |
3432 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
3433 | ||
ef54fd93 GP |
3434 | if (rx_control & L2CAP_CTRL_POLL) { |
3435 | l2cap_retransmit_frame(sk, tx_seq); | |
3436 | pi->expected_ack_seq = tx_seq; | |
3437 | l2cap_drop_acked_frames(sk); | |
3438 | l2cap_ertm_send(sk); | |
3439 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { | |
3440 | pi->srej_save_reqseq = tx_seq; | |
3441 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
3442 | } | |
3443 | } else if (rx_control & L2CAP_CTRL_FINAL) { | |
3444 | if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && | |
3445 | pi->srej_save_reqseq == tx_seq) | |
889a3ca4 | 3446 | pi->conn_state &= ~L2CAP_CONN_SREJ_ACT; |
ef54fd93 GP |
3447 | else |
3448 | l2cap_retransmit_frame(sk, tx_seq); | |
3449 | } | |
3450 | else { | |
3451 | l2cap_retransmit_frame(sk, tx_seq); | |
3452 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { | |
3453 | pi->srej_save_reqseq = tx_seq; | |
3454 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
3455 | } | |
3456 | } | |
8f17154f GP |
3457 | break; |
3458 | ||
3459 | case L2CAP_SUPER_RCV_NOT_READY: | |
2246b2f1 GP |
3460 | pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; |
3461 | pi->expected_ack_seq = tx_seq; | |
3462 | l2cap_drop_acked_frames(sk); | |
3463 | ||
3464 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
3465 | if (rx_control & L2CAP_CTRL_POLL) { | |
7e743090 GP |
3466 | u16 control = L2CAP_CTRL_FINAL; |
3467 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); | |
2246b2f1 | 3468 | } |
1c2acffb GP |
3469 | break; |
3470 | } | |
3471 | ||
3472 | return 0; | |
3473 | } | |
3474 | ||
1da177e4 LT |
3475 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
3476 | { | |
3477 | struct sock *sk; | |
6840ed07 | 3478 | struct l2cap_pinfo *pi; |
c74e560c | 3479 | u16 control, len; |
6840ed07 | 3480 | u8 tx_seq; |
1c2acffb | 3481 | int err; |
1da177e4 LT |
3482 | |
3483 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
3484 | if (!sk) { | |
3485 | BT_DBG("unknown cid 0x%4.4x", cid); | |
3486 | goto drop; | |
3487 | } | |
3488 | ||
6840ed07 GP |
3489 | pi = l2cap_pi(sk); |
3490 | ||
1da177e4 LT |
3491 | BT_DBG("sk %p, len %d", sk, skb->len); |
3492 | ||
3493 | if (sk->sk_state != BT_CONNECTED) | |
3494 | goto drop; | |
3495 | ||
6840ed07 | 3496 | switch (pi->mode) { |
1c2acffb GP |
3497 | case L2CAP_MODE_BASIC: |
3498 | /* If socket recv buffers overflows we drop data here | |
3499 | * which is *bad* because L2CAP has to be reliable. | |
3500 | * But we don't have any other choice. L2CAP doesn't | |
3501 | * provide flow control mechanism. */ | |
1da177e4 | 3502 | |
6840ed07 | 3503 | if (pi->imtu < skb->len) |
1c2acffb | 3504 | goto drop; |
1da177e4 | 3505 | |
1c2acffb GP |
3506 | if (!sock_queue_rcv_skb(sk, skb)) |
3507 | goto done; | |
3508 | break; | |
3509 | ||
3510 | case L2CAP_MODE_ERTM: | |
3511 | control = get_unaligned_le16(skb->data); | |
3512 | skb_pull(skb, 2); | |
c74e560c | 3513 | len = skb->len; |
1c2acffb | 3514 | |
c74e560c GP |
3515 | if (__is_sar_start(control)) |
3516 | len -= 2; | |
3517 | ||
fcc203c3 GP |
3518 | if (pi->fcs == L2CAP_FCS_CRC16) |
3519 | len -= 2; | |
3520 | ||
30afb5b2 GP |
3521 | /* |
3522 | * We can just drop the corrupted I-frame here. | |
3523 | * Receiver will miss it and start proper recovery | |
3524 | * procedures and ask retransmission. | |
3525 | */ | |
c74e560c | 3526 | if (len > L2CAP_DEFAULT_MAX_PDU_SIZE) |
1c2acffb GP |
3527 | goto drop; |
3528 | ||
fcc203c3 GP |
3529 | if (l2cap_check_fcs(pi, skb)) |
3530 | goto drop; | |
3531 | ||
1c2acffb GP |
3532 | if (__is_iframe(control)) |
3533 | err = l2cap_data_channel_iframe(sk, control, skb); | |
3534 | else | |
3535 | err = l2cap_data_channel_sframe(sk, control, skb); | |
3536 | ||
3537 | if (!err) | |
3538 | goto done; | |
3539 | break; | |
3540 | ||
6840ed07 GP |
3541 | case L2CAP_MODE_STREAMING: |
3542 | control = get_unaligned_le16(skb->data); | |
3543 | skb_pull(skb, 2); | |
3544 | len = skb->len; | |
3545 | ||
3546 | if (__is_sar_start(control)) | |
3547 | len -= 2; | |
3548 | ||
fcc203c3 GP |
3549 | if (pi->fcs == L2CAP_FCS_CRC16) |
3550 | len -= 2; | |
3551 | ||
6840ed07 GP |
3552 | if (len > L2CAP_DEFAULT_MAX_PDU_SIZE || __is_sframe(control)) |
3553 | goto drop; | |
3554 | ||
fcc203c3 GP |
3555 | if (l2cap_check_fcs(pi, skb)) |
3556 | goto drop; | |
3557 | ||
6840ed07 GP |
3558 | tx_seq = __get_txseq(control); |
3559 | ||
3560 | if (pi->expected_tx_seq == tx_seq) | |
3561 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
3562 | else | |
3563 | pi->expected_tx_seq = tx_seq + 1; | |
3564 | ||
3565 | err = l2cap_sar_reassembly_sdu(sk, skb, control); | |
3566 | ||
3567 | goto done; | |
3568 | ||
1c2acffb GP |
3569 | default: |
3570 | BT_DBG("sk %p: bad mode 0x%2.2x", sk, l2cap_pi(sk)->mode); | |
3571 | break; | |
3572 | } | |
1da177e4 LT |
3573 | |
3574 | drop: | |
3575 | kfree_skb(skb); | |
3576 | ||
3577 | done: | |
0139418c MH |
3578 | if (sk) |
3579 | bh_unlock_sock(sk); | |
3580 | ||
1da177e4 LT |
3581 | return 0; |
3582 | } | |
3583 | ||
8e036fc3 | 3584 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
3585 | { |
3586 | struct sock *sk; | |
3587 | ||
3588 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
3589 | if (!sk) | |
3590 | goto drop; | |
3591 | ||
3592 | BT_DBG("sk %p, len %d", sk, skb->len); | |
3593 | ||
3594 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
3595 | goto drop; | |
3596 | ||
3597 | if (l2cap_pi(sk)->imtu < skb->len) | |
3598 | goto drop; | |
3599 | ||
3600 | if (!sock_queue_rcv_skb(sk, skb)) | |
3601 | goto done; | |
3602 | ||
3603 | drop: | |
3604 | kfree_skb(skb); | |
3605 | ||
3606 | done: | |
af05b30b GP |
3607 | if (sk) |
3608 | bh_unlock_sock(sk); | |
1da177e4 LT |
3609 | return 0; |
3610 | } | |
3611 | ||
3612 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
3613 | { | |
3614 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
3615 | u16 cid, len; |
3616 | __le16 psm; | |
1da177e4 LT |
3617 | |
3618 | skb_pull(skb, L2CAP_HDR_SIZE); | |
3619 | cid = __le16_to_cpu(lh->cid); | |
3620 | len = __le16_to_cpu(lh->len); | |
3621 | ||
1c2acffb GP |
3622 | if (len != skb->len) { |
3623 | kfree_skb(skb); | |
3624 | return; | |
3625 | } | |
3626 | ||
1da177e4 LT |
3627 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
3628 | ||
3629 | switch (cid) { | |
8db4dc46 | 3630 | case L2CAP_CID_SIGNALING: |
1da177e4 LT |
3631 | l2cap_sig_channel(conn, skb); |
3632 | break; | |
3633 | ||
8db4dc46 | 3634 | case L2CAP_CID_CONN_LESS: |
1b7bf4ed | 3635 | psm = get_unaligned_le16(skb->data); |
1da177e4 LT |
3636 | skb_pull(skb, 2); |
3637 | l2cap_conless_channel(conn, psm, skb); | |
3638 | break; | |
3639 | ||
3640 | default: | |
3641 | l2cap_data_channel(conn, cid, skb); | |
3642 | break; | |
3643 | } | |
3644 | } | |
3645 | ||
3646 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
3647 | ||
3648 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
3649 | { | |
3650 | int exact = 0, lm1 = 0, lm2 = 0; | |
3651 | register struct sock *sk; | |
3652 | struct hlist_node *node; | |
3653 | ||
3654 | if (type != ACL_LINK) | |
3655 | return 0; | |
3656 | ||
3657 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
3658 | ||
3659 | /* Find listening sockets and check their link_mode */ | |
3660 | read_lock(&l2cap_sk_list.lock); | |
3661 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
3662 | if (sk->sk_state != BT_LISTEN) | |
3663 | continue; | |
3664 | ||
3665 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
3666 | lm1 |= HCI_LM_ACCEPT; |
3667 | if (l2cap_pi(sk)->role_switch) | |
3668 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 3669 | exact++; |
2af6b9d5 MH |
3670 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
3671 | lm2 |= HCI_LM_ACCEPT; | |
3672 | if (l2cap_pi(sk)->role_switch) | |
3673 | lm2 |= HCI_LM_MASTER; | |
3674 | } | |
1da177e4 LT |
3675 | } |
3676 | read_unlock(&l2cap_sk_list.lock); | |
3677 | ||
3678 | return exact ? lm1 : lm2; | |
3679 | } | |
3680 | ||
3681 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
3682 | { | |
0139418c MH |
3683 | struct l2cap_conn *conn; |
3684 | ||
1da177e4 LT |
3685 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
3686 | ||
3687 | if (hcon->type != ACL_LINK) | |
3688 | return 0; | |
3689 | ||
3690 | if (!status) { | |
1da177e4 LT |
3691 | conn = l2cap_conn_add(hcon, status); |
3692 | if (conn) | |
3693 | l2cap_conn_ready(conn); | |
0139418c | 3694 | } else |
1da177e4 LT |
3695 | l2cap_conn_del(hcon, bt_err(status)); |
3696 | ||
3697 | return 0; | |
3698 | } | |
3699 | ||
2950f21a MH |
3700 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
3701 | { | |
3702 | struct l2cap_conn *conn = hcon->l2cap_data; | |
3703 | ||
3704 | BT_DBG("hcon %p", hcon); | |
3705 | ||
3706 | if (hcon->type != ACL_LINK || !conn) | |
3707 | return 0x13; | |
3708 | ||
3709 | return conn->disc_reason; | |
3710 | } | |
3711 | ||
3712 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) | |
1da177e4 LT |
3713 | { |
3714 | BT_DBG("hcon %p reason %d", hcon, reason); | |
3715 | ||
3716 | if (hcon->type != ACL_LINK) | |
3717 | return 0; | |
3718 | ||
3719 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 3720 | |
1da177e4 LT |
3721 | return 0; |
3722 | } | |
3723 | ||
f62e4323 MH |
3724 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
3725 | { | |
255c7601 MH |
3726 | if (sk->sk_type != SOCK_SEQPACKET) |
3727 | return; | |
3728 | ||
f62e4323 MH |
3729 | if (encrypt == 0x00) { |
3730 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { | |
3731 | l2cap_sock_clear_timer(sk); | |
3732 | l2cap_sock_set_timer(sk, HZ * 5); | |
3733 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
3734 | __l2cap_sock_close(sk, ECONNREFUSED); | |
3735 | } else { | |
3736 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) | |
3737 | l2cap_sock_clear_timer(sk); | |
3738 | } | |
3739 | } | |
3740 | ||
8c1b2355 | 3741 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
3742 | { |
3743 | struct l2cap_chan_list *l; | |
0139418c | 3744 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 3745 | struct sock *sk; |
1da177e4 | 3746 | |
0139418c | 3747 | if (!conn) |
1da177e4 | 3748 | return 0; |
0139418c | 3749 | |
1da177e4 LT |
3750 | l = &conn->chan_list; |
3751 | ||
3752 | BT_DBG("conn %p", conn); | |
3753 | ||
3754 | read_lock(&l->lock); | |
3755 | ||
3756 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
3757 | bh_lock_sock(sk); | |
3758 | ||
6a8d3010 MH |
3759 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
3760 | bh_unlock_sock(sk); | |
3761 | continue; | |
3762 | } | |
3763 | ||
f62e4323 | 3764 | if (!status && (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 3765 | sk->sk_state == BT_CONFIG)) { |
f62e4323 | 3766 | l2cap_check_encryption(sk, encrypt); |
9719f8af MH |
3767 | bh_unlock_sock(sk); |
3768 | continue; | |
3769 | } | |
3770 | ||
b1235d79 MH |
3771 | if (sk->sk_state == BT_CONNECT) { |
3772 | if (!status) { | |
3773 | struct l2cap_conn_req req; | |
3774 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
3775 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 3776 | |
b1235d79 | 3777 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
1da177e4 | 3778 | |
b1235d79 MH |
3779 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
3780 | L2CAP_CONN_REQ, sizeof(req), &req); | |
3781 | } else { | |
3782 | l2cap_sock_clear_timer(sk); | |
3783 | l2cap_sock_set_timer(sk, HZ / 10); | |
3784 | } | |
3785 | } else if (sk->sk_state == BT_CONNECT2) { | |
3786 | struct l2cap_conn_rsp rsp; | |
3787 | __u16 result; | |
1da177e4 | 3788 | |
b1235d79 MH |
3789 | if (!status) { |
3790 | sk->sk_state = BT_CONFIG; | |
3791 | result = L2CAP_CR_SUCCESS; | |
3792 | } else { | |
3793 | sk->sk_state = BT_DISCONN; | |
3794 | l2cap_sock_set_timer(sk, HZ / 10); | |
3795 | result = L2CAP_CR_SEC_BLOCK; | |
3796 | } | |
3797 | ||
3798 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
3799 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
3800 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 3801 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
3802 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
3803 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
3804 | } | |
1da177e4 LT |
3805 | |
3806 | bh_unlock_sock(sk); | |
3807 | } | |
3808 | ||
3809 | read_unlock(&l->lock); | |
b1235d79 | 3810 | |
1da177e4 LT |
3811 | return 0; |
3812 | } | |
3813 | ||
3814 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
3815 | { | |
3816 | struct l2cap_conn *conn = hcon->l2cap_data; | |
3817 | ||
3818 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
3819 | goto drop; | |
3820 | ||
3821 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
3822 | ||
3823 | if (flags & ACL_START) { | |
3824 | struct l2cap_hdr *hdr; | |
3825 | int len; | |
3826 | ||
3827 | if (conn->rx_len) { | |
3828 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
3829 | kfree_skb(conn->rx_skb); | |
3830 | conn->rx_skb = NULL; | |
3831 | conn->rx_len = 0; | |
3832 | l2cap_conn_unreliable(conn, ECOMM); | |
3833 | } | |
3834 | ||
3835 | if (skb->len < 2) { | |
3836 | BT_ERR("Frame is too short (len %d)", skb->len); | |
3837 | l2cap_conn_unreliable(conn, ECOMM); | |
3838 | goto drop; | |
3839 | } | |
3840 | ||
3841 | hdr = (struct l2cap_hdr *) skb->data; | |
3842 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
3843 | ||
3844 | if (len == skb->len) { | |
3845 | /* Complete frame received */ | |
3846 | l2cap_recv_frame(conn, skb); | |
3847 | return 0; | |
3848 | } | |
3849 | ||
3850 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
3851 | ||
3852 | if (skb->len > len) { | |
3853 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
3854 | skb->len, len); | |
3855 | l2cap_conn_unreliable(conn, ECOMM); | |
3856 | goto drop; | |
3857 | } | |
3858 | ||
3859 | /* Allocate skb for the complete frame (with header) */ | |
af05b30b GP |
3860 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
3861 | if (!conn->rx_skb) | |
1da177e4 LT |
3862 | goto drop; |
3863 | ||
d626f62b | 3864 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 3865 | skb->len); |
1da177e4 LT |
3866 | conn->rx_len = len - skb->len; |
3867 | } else { | |
3868 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
3869 | ||
3870 | if (!conn->rx_len) { | |
3871 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
3872 | l2cap_conn_unreliable(conn, ECOMM); | |
3873 | goto drop; | |
3874 | } | |
3875 | ||
3876 | if (skb->len > conn->rx_len) { | |
3877 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
3878 | skb->len, conn->rx_len); | |
3879 | kfree_skb(conn->rx_skb); | |
3880 | conn->rx_skb = NULL; | |
3881 | conn->rx_len = 0; | |
3882 | l2cap_conn_unreliable(conn, ECOMM); | |
3883 | goto drop; | |
3884 | } | |
3885 | ||
d626f62b | 3886 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 3887 | skb->len); |
1da177e4 LT |
3888 | conn->rx_len -= skb->len; |
3889 | ||
3890 | if (!conn->rx_len) { | |
3891 | /* Complete frame received */ | |
3892 | l2cap_recv_frame(conn, conn->rx_skb); | |
3893 | conn->rx_skb = NULL; | |
3894 | } | |
3895 | } | |
3896 | ||
3897 | drop: | |
3898 | kfree_skb(skb); | |
3899 | return 0; | |
3900 | } | |
3901 | ||
be9d1227 | 3902 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
3903 | { |
3904 | struct sock *sk; | |
3905 | struct hlist_node *node; | |
be9d1227 | 3906 | char *str = buf; |
1da177e4 LT |
3907 | |
3908 | read_lock_bh(&l2cap_sk_list.lock); | |
3909 | ||
be9d1227 MH |
3910 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
3911 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1da177e4 | 3912 | |
2af6b9d5 | 3913 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
be9d1227 | 3914 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), |
b4324b5d MH |
3915 | sk->sk_state, __le16_to_cpu(pi->psm), pi->scid, |
3916 | pi->dcid, pi->imtu, pi->omtu, pi->sec_level); | |
be9d1227 | 3917 | } |
1da177e4 | 3918 | |
1da177e4 | 3919 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 3920 | |
af05b30b | 3921 | return str - buf; |
1da177e4 LT |
3922 | } |
3923 | ||
be9d1227 | 3924 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
1da177e4 | 3925 | |
90ddc4f0 | 3926 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
3927 | .family = PF_BLUETOOTH, |
3928 | .owner = THIS_MODULE, | |
3929 | .release = l2cap_sock_release, | |
3930 | .bind = l2cap_sock_bind, | |
3931 | .connect = l2cap_sock_connect, | |
3932 | .listen = l2cap_sock_listen, | |
3933 | .accept = l2cap_sock_accept, | |
3934 | .getname = l2cap_sock_getname, | |
3935 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 3936 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 3937 | .poll = bt_sock_poll, |
3241ad82 | 3938 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
3939 | .mmap = sock_no_mmap, |
3940 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
3941 | .shutdown = l2cap_sock_shutdown, |
3942 | .setsockopt = l2cap_sock_setsockopt, | |
3943 | .getsockopt = l2cap_sock_getsockopt | |
3944 | }; | |
3945 | ||
ec1b4cf7 | 3946 | static const struct net_proto_family l2cap_sock_family_ops = { |
1da177e4 LT |
3947 | .family = PF_BLUETOOTH, |
3948 | .owner = THIS_MODULE, | |
3949 | .create = l2cap_sock_create, | |
3950 | }; | |
3951 | ||
3952 | static struct hci_proto l2cap_hci_proto = { | |
3953 | .name = "L2CAP", | |
3954 | .id = HCI_PROTO_L2CAP, | |
3955 | .connect_ind = l2cap_connect_ind, | |
3956 | .connect_cfm = l2cap_connect_cfm, | |
3957 | .disconn_ind = l2cap_disconn_ind, | |
2950f21a | 3958 | .disconn_cfm = l2cap_disconn_cfm, |
8c1b2355 | 3959 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
3960 | .recv_acldata = l2cap_recv_acldata |
3961 | }; | |
3962 | ||
3963 | static int __init l2cap_init(void) | |
3964 | { | |
3965 | int err; | |
be9d1227 | 3966 | |
1da177e4 LT |
3967 | err = proto_register(&l2cap_proto, 0); |
3968 | if (err < 0) | |
3969 | return err; | |
3970 | ||
3971 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
3972 | if (err < 0) { | |
3973 | BT_ERR("L2CAP socket registration failed"); | |
3974 | goto error; | |
3975 | } | |
3976 | ||
3977 | err = hci_register_proto(&l2cap_hci_proto); | |
3978 | if (err < 0) { | |
3979 | BT_ERR("L2CAP protocol registration failed"); | |
3980 | bt_sock_unregister(BTPROTO_L2CAP); | |
3981 | goto error; | |
3982 | } | |
3983 | ||
df5c37ea MH |
3984 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
3985 | BT_ERR("Failed to create L2CAP info file"); | |
1da177e4 LT |
3986 | |
3987 | BT_INFO("L2CAP ver %s", VERSION); | |
3988 | BT_INFO("L2CAP socket layer initialized"); | |
3989 | ||
3990 | return 0; | |
3991 | ||
3992 | error: | |
3993 | proto_unregister(&l2cap_proto); | |
3994 | return err; | |
3995 | } | |
3996 | ||
3997 | static void __exit l2cap_exit(void) | |
3998 | { | |
a91f2e39 | 3999 | class_remove_file(bt_class, &class_attr_l2cap); |
1da177e4 LT |
4000 | |
4001 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
4002 | BT_ERR("L2CAP socket unregistration failed"); | |
4003 | ||
4004 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
4005 | BT_ERR("L2CAP protocol unregistration failed"); | |
4006 | ||
4007 | proto_unregister(&l2cap_proto); | |
4008 | } | |
4009 | ||
4010 | void l2cap_load(void) | |
4011 | { | |
4012 | /* Dummy function to trigger automatic L2CAP module loading by | |
4013 | * other modules that use L2CAP sockets but don't use any other | |
4014 | * symbols from it. */ | |
4015 | return; | |
4016 | } | |
4017 | EXPORT_SYMBOL(l2cap_load); | |
4018 | ||
4019 | module_init(l2cap_init); | |
4020 | module_exit(l2cap_exit); | |
4021 | ||
44dd46de MH |
4022 | module_param(enable_ertm, bool, 0644); |
4023 | MODULE_PARM_DESC(enable_ertm, "Enable enhanced retransmission mode"); | |
4024 | ||
63fbd24e | 4025 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
4026 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
4027 | MODULE_VERSION(VERSION); | |
4028 | MODULE_LICENSE("GPL"); | |
4029 | MODULE_ALIAS("bt-proto-0"); |