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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 | ||
2ab25cdd GP |
376 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
377 | ||
7e743090 GP |
378 | return l2cap_send_sframe(pi, control); |
379 | } | |
380 | ||
79d554a6 MH |
381 | static void l2cap_do_start(struct sock *sk) |
382 | { | |
383 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
384 | ||
385 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
984947dc MH |
386 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
387 | return; | |
388 | ||
2af6b9d5 | 389 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
390 | struct l2cap_conn_req req; |
391 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
392 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 393 | |
b1235d79 | 394 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 395 | |
b1235d79 | 396 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 397 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 398 | } |
79d554a6 MH |
399 | } else { |
400 | struct l2cap_info_req req; | |
401 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
402 | ||
403 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
404 | conn->info_ident = l2cap_get_ident(conn); | |
405 | ||
406 | mod_timer(&conn->info_timer, jiffies + | |
407 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
408 | ||
409 | l2cap_send_cmd(conn, conn->info_ident, | |
410 | L2CAP_INFO_REQ, sizeof(req), &req); | |
411 | } | |
412 | } | |
413 | ||
22121fc9 GP |
414 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk) |
415 | { | |
416 | struct l2cap_disconn_req req; | |
417 | ||
418 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
419 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
420 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
421 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
422 | } | |
423 | ||
1da177e4 | 424 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
425 | static void l2cap_conn_start(struct l2cap_conn *conn) |
426 | { | |
427 | struct l2cap_chan_list *l = &conn->chan_list; | |
428 | struct sock *sk; | |
429 | ||
430 | BT_DBG("conn %p", conn); | |
431 | ||
432 | read_lock(&l->lock); | |
433 | ||
434 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
435 | bh_lock_sock(sk); | |
436 | ||
437 | if (sk->sk_type != SOCK_SEQPACKET) { | |
79d554a6 MH |
438 | bh_unlock_sock(sk); |
439 | continue; | |
440 | } | |
441 | ||
442 | if (sk->sk_state == BT_CONNECT) { | |
2af6b9d5 | 443 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
444 | struct l2cap_conn_req req; |
445 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
446 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 447 | |
b1235d79 | 448 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 449 | |
b1235d79 | 450 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4e8402a3 | 451 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 452 | } |
79d554a6 MH |
453 | } else if (sk->sk_state == BT_CONNECT2) { |
454 | struct l2cap_conn_rsp rsp; | |
455 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
456 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
457 | ||
2af6b9d5 | 458 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
459 | if (bt_sk(sk)->defer_setup) { |
460 | struct sock *parent = bt_sk(sk)->parent; | |
461 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
462 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
463 | parent->sk_data_ready(parent, 0); | |
464 | ||
465 | } else { | |
466 | sk->sk_state = BT_CONFIG; | |
467 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
468 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
469 | } | |
79d554a6 MH |
470 | } else { |
471 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
472 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
473 | } | |
474 | ||
475 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
476 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4e8402a3 MH |
477 | } |
478 | ||
479 | bh_unlock_sock(sk); | |
480 | } | |
481 | ||
482 | read_unlock(&l->lock); | |
483 | } | |
484 | ||
485 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
486 | { | |
79d554a6 MH |
487 | struct l2cap_chan_list *l = &conn->chan_list; |
488 | struct sock *sk; | |
4e8402a3 | 489 | |
79d554a6 | 490 | BT_DBG("conn %p", conn); |
4e8402a3 | 491 | |
79d554a6 | 492 | read_lock(&l->lock); |
4e8402a3 | 493 | |
79d554a6 MH |
494 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
495 | bh_lock_sock(sk); | |
4e8402a3 | 496 | |
79d554a6 MH |
497 | if (sk->sk_type != SOCK_SEQPACKET) { |
498 | l2cap_sock_clear_timer(sk); | |
499 | sk->sk_state = BT_CONNECTED; | |
500 | sk->sk_state_change(sk); | |
501 | } else if (sk->sk_state == BT_CONNECT) | |
502 | l2cap_do_start(sk); | |
4e8402a3 | 503 | |
79d554a6 | 504 | bh_unlock_sock(sk); |
4e8402a3 | 505 | } |
79d554a6 MH |
506 | |
507 | read_unlock(&l->lock); | |
4e8402a3 MH |
508 | } |
509 | ||
510 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
511 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
512 | { | |
513 | struct l2cap_chan_list *l = &conn->chan_list; | |
514 | struct sock *sk; | |
515 | ||
516 | BT_DBG("conn %p", conn); | |
517 | ||
518 | read_lock(&l->lock); | |
519 | ||
520 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 521 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
522 | sk->sk_err = err; |
523 | } | |
524 | ||
525 | read_unlock(&l->lock); | |
526 | } | |
527 | ||
528 | static void l2cap_info_timeout(unsigned long arg) | |
529 | { | |
530 | struct l2cap_conn *conn = (void *) arg; | |
531 | ||
984947dc | 532 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 533 | conn->info_ident = 0; |
984947dc | 534 | |
4e8402a3 MH |
535 | l2cap_conn_start(conn); |
536 | } | |
537 | ||
1da177e4 LT |
538 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
539 | { | |
0139418c | 540 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 541 | |
0139418c | 542 | if (conn || status) |
1da177e4 LT |
543 | return conn; |
544 | ||
0139418c MH |
545 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
546 | if (!conn) | |
1da177e4 | 547 | return NULL; |
1da177e4 LT |
548 | |
549 | hcon->l2cap_data = conn; | |
550 | conn->hcon = hcon; | |
551 | ||
0139418c MH |
552 | BT_DBG("hcon %p conn %p", hcon, conn); |
553 | ||
1da177e4 LT |
554 | conn->mtu = hcon->hdev->acl_mtu; |
555 | conn->src = &hcon->hdev->bdaddr; | |
556 | conn->dst = &hcon->dst; | |
557 | ||
4e8402a3 MH |
558 | conn->feat_mask = 0; |
559 | ||
1da177e4 LT |
560 | spin_lock_init(&conn->lock); |
561 | rwlock_init(&conn->chan_list.lock); | |
562 | ||
45054dc1 DY |
563 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
564 | (unsigned long) conn); | |
565 | ||
2950f21a MH |
566 | conn->disc_reason = 0x13; |
567 | ||
1da177e4 LT |
568 | return conn; |
569 | } | |
570 | ||
0139418c | 571 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 572 | { |
0139418c | 573 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
574 | struct sock *sk; |
575 | ||
0139418c MH |
576 | if (!conn) |
577 | return; | |
1da177e4 LT |
578 | |
579 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
580 | ||
7585b97a | 581 | kfree_skb(conn->rx_skb); |
1da177e4 LT |
582 | |
583 | /* Kill channels */ | |
584 | while ((sk = conn->chan_list.head)) { | |
585 | bh_lock_sock(sk); | |
586 | l2cap_chan_del(sk, err); | |
587 | bh_unlock_sock(sk); | |
588 | l2cap_sock_kill(sk); | |
589 | } | |
590 | ||
8e8440f5 DY |
591 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
592 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 593 | |
1da177e4 LT |
594 | hcon->l2cap_data = NULL; |
595 | kfree(conn); | |
1da177e4 LT |
596 | } |
597 | ||
598 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
599 | { | |
600 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 601 | write_lock_bh(&l->lock); |
1da177e4 | 602 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 603 | write_unlock_bh(&l->lock); |
1da177e4 LT |
604 | } |
605 | ||
1da177e4 | 606 | /* ---- Socket interface ---- */ |
8e036fc3 | 607 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
608 | { |
609 | struct sock *sk; | |
610 | struct hlist_node *node; | |
611 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
612 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
613 | goto found; | |
614 | sk = NULL; | |
615 | found: | |
616 | return sk; | |
617 | } | |
618 | ||
619 | /* Find socket with psm and source bdaddr. | |
620 | * Returns closest match. | |
621 | */ | |
8e036fc3 | 622 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
623 | { |
624 | struct sock *sk = NULL, *sk1 = NULL; | |
625 | struct hlist_node *node; | |
626 | ||
627 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
628 | if (state && sk->sk_state != state) | |
629 | continue; | |
630 | ||
631 | if (l2cap_pi(sk)->psm == psm) { | |
632 | /* Exact match. */ | |
633 | if (!bacmp(&bt_sk(sk)->src, src)) | |
634 | break; | |
635 | ||
636 | /* Closest match */ | |
637 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
638 | sk1 = sk; | |
639 | } | |
640 | } | |
641 | return node ? sk : sk1; | |
642 | } | |
643 | ||
644 | /* Find socket with given address (psm, src). | |
645 | * Returns locked socket */ | |
8e036fc3 | 646 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
647 | { |
648 | struct sock *s; | |
649 | read_lock(&l2cap_sk_list.lock); | |
650 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
af05b30b GP |
651 | if (s) |
652 | bh_lock_sock(s); | |
1da177e4 LT |
653 | read_unlock(&l2cap_sk_list.lock); |
654 | return s; | |
655 | } | |
656 | ||
657 | static void l2cap_sock_destruct(struct sock *sk) | |
658 | { | |
659 | BT_DBG("sk %p", sk); | |
660 | ||
661 | skb_queue_purge(&sk->sk_receive_queue); | |
662 | skb_queue_purge(&sk->sk_write_queue); | |
663 | } | |
664 | ||
665 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
666 | { | |
667 | struct sock *sk; | |
668 | ||
669 | BT_DBG("parent %p", parent); | |
670 | ||
671 | /* Close not yet accepted channels */ | |
672 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
673 | l2cap_sock_close(sk); | |
674 | ||
b1235d79 | 675 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
676 | sock_set_flag(parent, SOCK_ZAPPED); |
677 | } | |
678 | ||
679 | /* Kill socket (only if zapped and orphan) | |
680 | * Must be called on unlocked socket. | |
681 | */ | |
682 | static void l2cap_sock_kill(struct sock *sk) | |
683 | { | |
684 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
685 | return; | |
686 | ||
687 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
688 | ||
689 | /* Kill poor orphan */ | |
690 | bt_sock_unlink(&l2cap_sk_list, sk); | |
691 | sock_set_flag(sk, SOCK_DEAD); | |
692 | sock_put(sk); | |
693 | } | |
694 | ||
695 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
696 | { | |
697 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
698 | ||
699 | switch (sk->sk_state) { | |
700 | case BT_LISTEN: | |
701 | l2cap_sock_cleanup_listen(sk); | |
702 | break; | |
703 | ||
704 | case BT_CONNECTED: | |
705 | case BT_CONFIG: | |
1da177e4 LT |
706 | if (sk->sk_type == SOCK_SEQPACKET) { |
707 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1da177e4 LT |
708 | |
709 | sk->sk_state = BT_DISCONN; | |
710 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
22121fc9 | 711 | l2cap_send_disconn_req(conn, sk); |
b1235d79 | 712 | } else |
1da177e4 | 713 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
714 | break; |
715 | ||
f66dc81f MH |
716 | case BT_CONNECT2: |
717 | if (sk->sk_type == SOCK_SEQPACKET) { | |
718 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
719 | struct l2cap_conn_rsp rsp; | |
720 | __u16 result; | |
721 | ||
722 | if (bt_sk(sk)->defer_setup) | |
723 | result = L2CAP_CR_SEC_BLOCK; | |
724 | else | |
725 | result = L2CAP_CR_BAD_PSM; | |
726 | ||
727 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
728 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
729 | rsp.result = cpu_to_le16(result); | |
730 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
731 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
732 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
733 | } else | |
734 | l2cap_chan_del(sk, reason); | |
735 | break; | |
736 | ||
1da177e4 LT |
737 | case BT_CONNECT: |
738 | case BT_DISCONN: | |
739 | l2cap_chan_del(sk, reason); | |
740 | break; | |
741 | ||
742 | default: | |
743 | sock_set_flag(sk, SOCK_ZAPPED); | |
744 | break; | |
745 | } | |
746 | } | |
747 | ||
748 | /* Must be called on unlocked socket. */ | |
749 | static void l2cap_sock_close(struct sock *sk) | |
750 | { | |
751 | l2cap_sock_clear_timer(sk); | |
752 | lock_sock(sk); | |
753 | __l2cap_sock_close(sk, ECONNRESET); | |
754 | release_sock(sk); | |
755 | l2cap_sock_kill(sk); | |
756 | } | |
757 | ||
758 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
759 | { | |
760 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
761 | ||
762 | BT_DBG("sk %p", sk); | |
763 | ||
764 | if (parent) { | |
765 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
766 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
767 | ||
1da177e4 LT |
768 | pi->imtu = l2cap_pi(parent)->imtu; |
769 | pi->omtu = l2cap_pi(parent)->omtu; | |
c6b03cf9 MH |
770 | pi->mode = l2cap_pi(parent)->mode; |
771 | pi->fcs = l2cap_pi(parent)->fcs; | |
2af6b9d5 MH |
772 | pi->sec_level = l2cap_pi(parent)->sec_level; |
773 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
774 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
775 | } else { |
776 | pi->imtu = L2CAP_DEFAULT_MTU; | |
777 | pi->omtu = 0; | |
c6b03cf9 MH |
778 | pi->mode = L2CAP_MODE_BASIC; |
779 | pi->fcs = L2CAP_FCS_CRC16; | |
2af6b9d5 MH |
780 | pi->sec_level = BT_SECURITY_LOW; |
781 | pi->role_switch = 0; | |
782 | pi->force_reliable = 0; | |
1da177e4 LT |
783 | } |
784 | ||
785 | /* Default config options */ | |
5dee9e7c | 786 | pi->conf_len = 0; |
1da177e4 | 787 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
45054dc1 DY |
788 | skb_queue_head_init(TX_QUEUE(sk)); |
789 | skb_queue_head_init(SREJ_QUEUE(sk)); | |
790 | INIT_LIST_HEAD(SREJ_LIST(sk)); | |
1da177e4 LT |
791 | } |
792 | ||
793 | static struct proto l2cap_proto = { | |
794 | .name = "L2CAP", | |
795 | .owner = THIS_MODULE, | |
796 | .obj_size = sizeof(struct l2cap_pinfo) | |
797 | }; | |
798 | ||
1b8d7ae4 | 799 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
800 | { |
801 | struct sock *sk; | |
802 | ||
6257ff21 | 803 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
804 | if (!sk) |
805 | return NULL; | |
806 | ||
807 | sock_init_data(sock, sk); | |
808 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
809 | ||
810 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 811 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
812 | |
813 | sock_reset_flag(sk, SOCK_ZAPPED); | |
814 | ||
815 | sk->sk_protocol = proto; | |
b1235d79 | 816 | sk->sk_state = BT_OPEN; |
1da177e4 | 817 | |
b1235d79 | 818 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
819 | |
820 | bt_sock_link(&l2cap_sk_list, sk); | |
821 | return sk; | |
822 | } | |
823 | ||
3f378b68 EP |
824 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, |
825 | int kern) | |
1da177e4 LT |
826 | { |
827 | struct sock *sk; | |
828 | ||
829 | BT_DBG("sock %p", sock); | |
830 | ||
831 | sock->state = SS_UNCONNECTED; | |
832 | ||
833 | if (sock->type != SOCK_SEQPACKET && | |
834 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
835 | return -ESOCKTNOSUPPORT; | |
836 | ||
c84b3268 | 837 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
1da177e4 LT |
838 | return -EPERM; |
839 | ||
840 | sock->ops = &l2cap_sock_ops; | |
841 | ||
1b8d7ae4 | 842 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
843 | if (!sk) |
844 | return -ENOMEM; | |
845 | ||
846 | l2cap_sock_init(sk, NULL); | |
847 | return 0; | |
848 | } | |
849 | ||
f29972de | 850 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
1da177e4 | 851 | { |
1da177e4 | 852 | struct sock *sk = sock->sk; |
f29972de MH |
853 | struct sockaddr_l2 la; |
854 | int len, err = 0; | |
1da177e4 | 855 | |
f29972de | 856 | BT_DBG("sk %p", sk); |
1da177e4 LT |
857 | |
858 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
859 | return -EINVAL; | |
860 | ||
f29972de MH |
861 | memset(&la, 0, sizeof(la)); |
862 | len = min_t(unsigned int, sizeof(la), alen); | |
863 | memcpy(&la, addr, len); | |
864 | ||
2a517ca6 MH |
865 | if (la.l2_cid) |
866 | return -EINVAL; | |
867 | ||
1da177e4 LT |
868 | lock_sock(sk); |
869 | ||
870 | if (sk->sk_state != BT_OPEN) { | |
871 | err = -EBADFD; | |
872 | goto done; | |
873 | } | |
874 | ||
b4324b5d | 875 | if (la.l2_psm && __le16_to_cpu(la.l2_psm) < 0x1001 && |
847641d7 MH |
876 | !capable(CAP_NET_BIND_SERVICE)) { |
877 | err = -EACCES; | |
878 | goto done; | |
879 | } | |
8e87d142 | 880 | |
1da177e4 LT |
881 | write_lock_bh(&l2cap_sk_list.lock); |
882 | ||
f29972de | 883 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
1da177e4 LT |
884 | err = -EADDRINUSE; |
885 | } else { | |
886 | /* Save source address */ | |
f29972de MH |
887 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
888 | l2cap_pi(sk)->psm = la.l2_psm; | |
889 | l2cap_pi(sk)->sport = la.l2_psm; | |
1da177e4 | 890 | sk->sk_state = BT_BOUND; |
2af6b9d5 | 891 | |
b4324b5d MH |
892 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
893 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
2af6b9d5 | 894 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
1da177e4 LT |
895 | } |
896 | ||
897 | write_unlock_bh(&l2cap_sk_list.lock); | |
898 | ||
899 | done: | |
900 | release_sock(sk); | |
901 | return err; | |
902 | } | |
903 | ||
904 | static int l2cap_do_connect(struct sock *sk) | |
905 | { | |
906 | bdaddr_t *src = &bt_sk(sk)->src; | |
907 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
908 | struct l2cap_conn *conn; | |
909 | struct hci_conn *hcon; | |
910 | struct hci_dev *hdev; | |
09ab6f4c | 911 | __u8 auth_type; |
44d0e48e | 912 | int err; |
1da177e4 | 913 | |
f29972de MH |
914 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
915 | l2cap_pi(sk)->psm); | |
1da177e4 | 916 | |
af05b30b GP |
917 | hdev = hci_get_route(dst, src); |
918 | if (!hdev) | |
1da177e4 LT |
919 | return -EHOSTUNREACH; |
920 | ||
921 | hci_dev_lock_bh(hdev); | |
922 | ||
923 | err = -ENOMEM; | |
924 | ||
8c1b2355 | 925 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
926 | switch (l2cap_pi(sk)->sec_level) { |
927 | case BT_SECURITY_HIGH: | |
8c1b2355 | 928 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
929 | break; |
930 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 931 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
932 | break; |
933 | default: | |
09ab6f4c | 934 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
935 | break; |
936 | } | |
8c1b2355 | 937 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 938 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 939 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 940 | else |
8c1b2355 | 941 | auth_type = HCI_AT_NO_BONDING; |
435fef20 MH |
942 | |
943 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
944 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
8c1b2355 | 945 | } else { |
2af6b9d5 MH |
946 | switch (l2cap_pi(sk)->sec_level) { |
947 | case BT_SECURITY_HIGH: | |
8c1b2355 | 948 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
949 | break; |
950 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 951 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
952 | break; |
953 | default: | |
8c1b2355 | 954 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
955 | break; |
956 | } | |
09ab6f4c MH |
957 | } |
958 | ||
2af6b9d5 MH |
959 | hcon = hci_connect(hdev, ACL_LINK, dst, |
960 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
961 | if (!hcon) |
962 | goto done; | |
963 | ||
964 | conn = l2cap_conn_add(hcon, 0); | |
965 | if (!conn) { | |
966 | hci_conn_put(hcon); | |
967 | goto done; | |
968 | } | |
969 | ||
970 | err = 0; | |
971 | ||
972 | /* Update source addr of the socket */ | |
973 | bacpy(src, conn->src); | |
974 | ||
975 | l2cap_chan_add(conn, sk, NULL); | |
976 | ||
977 | sk->sk_state = BT_CONNECT; | |
978 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
979 | ||
980 | if (hcon->state == BT_CONNECTED) { | |
79d554a6 | 981 | if (sk->sk_type != SOCK_SEQPACKET) { |
1da177e4 LT |
982 | l2cap_sock_clear_timer(sk); |
983 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
984 | } else |
985 | l2cap_do_start(sk); | |
1da177e4 LT |
986 | } |
987 | ||
988 | done: | |
989 | hci_dev_unlock_bh(hdev); | |
990 | hci_dev_put(hdev); | |
991 | return err; | |
992 | } | |
993 | ||
994 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
995 | { | |
1da177e4 | 996 | struct sock *sk = sock->sk; |
f29972de MH |
997 | struct sockaddr_l2 la; |
998 | int len, err = 0; | |
1da177e4 | 999 | |
1da177e4 LT |
1000 | BT_DBG("sk %p", sk); |
1001 | ||
2a517ca6 MH |
1002 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
1003 | return -EINVAL; | |
1da177e4 | 1004 | |
f29972de MH |
1005 | memset(&la, 0, sizeof(la)); |
1006 | len = min_t(unsigned int, sizeof(la), alen); | |
1007 | memcpy(&la, addr, len); | |
1008 | ||
2a517ca6 MH |
1009 | if (la.l2_cid) |
1010 | return -EINVAL; | |
1011 | ||
1012 | lock_sock(sk); | |
1013 | ||
f29972de | 1014 | if (sk->sk_type == SOCK_SEQPACKET && !la.l2_psm) { |
1da177e4 LT |
1015 | err = -EINVAL; |
1016 | goto done; | |
1017 | } | |
1018 | ||
c6b03cf9 MH |
1019 | switch (l2cap_pi(sk)->mode) { |
1020 | case L2CAP_MODE_BASIC: | |
1021 | break; | |
1022 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1023 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1024 | if (enable_ertm) |
1025 | break; | |
1026 | /* fall through */ | |
1027 | default: | |
1028 | err = -ENOTSUPP; | |
1029 | goto done; | |
1030 | } | |
1031 | ||
af05b30b | 1032 | switch (sk->sk_state) { |
1da177e4 LT |
1033 | case BT_CONNECT: |
1034 | case BT_CONNECT2: | |
1035 | case BT_CONFIG: | |
1036 | /* Already connecting */ | |
1037 | goto wait; | |
1038 | ||
1039 | case BT_CONNECTED: | |
1040 | /* Already connected */ | |
1041 | goto done; | |
1042 | ||
1043 | case BT_OPEN: | |
1044 | case BT_BOUND: | |
1045 | /* Can connect */ | |
1046 | break; | |
1047 | ||
1048 | default: | |
1049 | err = -EBADFD; | |
1050 | goto done; | |
1051 | } | |
1052 | ||
1053 | /* Set destination address and psm */ | |
f29972de MH |
1054 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
1055 | l2cap_pi(sk)->psm = la.l2_psm; | |
1da177e4 | 1056 | |
af05b30b GP |
1057 | err = l2cap_do_connect(sk); |
1058 | if (err) | |
1da177e4 LT |
1059 | goto done; |
1060 | ||
1061 | wait: | |
1062 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
1063 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
1064 | done: | |
1065 | release_sock(sk); | |
1066 | return err; | |
1067 | } | |
1068 | ||
1069 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
1070 | { | |
1071 | struct sock *sk = sock->sk; | |
1072 | int err = 0; | |
1073 | ||
1074 | BT_DBG("sk %p backlog %d", sk, backlog); | |
1075 | ||
1076 | lock_sock(sk); | |
1077 | ||
1078 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
1079 | err = -EBADFD; | |
1080 | goto done; | |
1081 | } | |
1082 | ||
c6b03cf9 MH |
1083 | switch (l2cap_pi(sk)->mode) { |
1084 | case L2CAP_MODE_BASIC: | |
1085 | break; | |
1086 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1087 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1088 | if (enable_ertm) |
1089 | break; | |
1090 | /* fall through */ | |
1091 | default: | |
1092 | err = -ENOTSUPP; | |
1093 | goto done; | |
1094 | } | |
1095 | ||
1da177e4 LT |
1096 | if (!l2cap_pi(sk)->psm) { |
1097 | bdaddr_t *src = &bt_sk(sk)->src; | |
1098 | u16 psm; | |
1099 | ||
1100 | err = -EINVAL; | |
1101 | ||
1102 | write_lock_bh(&l2cap_sk_list.lock); | |
1103 | ||
1104 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
b4324b5d MH |
1105 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
1106 | l2cap_pi(sk)->psm = cpu_to_le16(psm); | |
1107 | l2cap_pi(sk)->sport = cpu_to_le16(psm); | |
1da177e4 LT |
1108 | err = 0; |
1109 | break; | |
1110 | } | |
1111 | ||
1112 | write_unlock_bh(&l2cap_sk_list.lock); | |
1113 | ||
1114 | if (err < 0) | |
1115 | goto done; | |
1116 | } | |
1117 | ||
1118 | sk->sk_max_ack_backlog = backlog; | |
1119 | sk->sk_ack_backlog = 0; | |
1120 | sk->sk_state = BT_LISTEN; | |
1121 | ||
1122 | done: | |
1123 | release_sock(sk); | |
1124 | return err; | |
1125 | } | |
1126 | ||
1127 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
1128 | { | |
1129 | DECLARE_WAITQUEUE(wait, current); | |
1130 | struct sock *sk = sock->sk, *nsk; | |
1131 | long timeo; | |
1132 | int err = 0; | |
1133 | ||
fcc70d5f | 1134 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1135 | |
1136 | if (sk->sk_state != BT_LISTEN) { | |
1137 | err = -EBADFD; | |
1138 | goto done; | |
1139 | } | |
1140 | ||
1141 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1142 | ||
1143 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1144 | ||
1145 | /* Wait for an incoming connection. (wake-one). */ | |
1146 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
1147 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
1148 | set_current_state(TASK_INTERRUPTIBLE); | |
1149 | if (!timeo) { | |
1150 | err = -EAGAIN; | |
1151 | break; | |
1152 | } | |
1153 | ||
1154 | release_sock(sk); | |
1155 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1156 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1157 | |
1158 | if (sk->sk_state != BT_LISTEN) { | |
1159 | err = -EBADFD; | |
1160 | break; | |
1161 | } | |
1162 | ||
1163 | if (signal_pending(current)) { | |
1164 | err = sock_intr_errno(timeo); | |
1165 | break; | |
1166 | } | |
1167 | } | |
1168 | set_current_state(TASK_RUNNING); | |
1169 | remove_wait_queue(sk->sk_sleep, &wait); | |
1170 | ||
1171 | if (err) | |
1172 | goto done; | |
1173 | ||
1174 | newsock->state = SS_CONNECTED; | |
1175 | ||
1176 | BT_DBG("new socket %p", nsk); | |
1177 | ||
1178 | done: | |
1179 | release_sock(sk); | |
1180 | return err; | |
1181 | } | |
1182 | ||
1183 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1184 | { | |
1185 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1186 | struct sock *sk = sock->sk; | |
1187 | ||
1188 | BT_DBG("sock %p, sk %p", sock, sk); | |
1189 | ||
1190 | addr->sa_family = AF_BLUETOOTH; | |
1191 | *len = sizeof(struct sockaddr_l2); | |
1192 | ||
f29972de MH |
1193 | if (peer) { |
1194 | la->l2_psm = l2cap_pi(sk)->psm; | |
1da177e4 | 1195 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
b4324b5d | 1196 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
f29972de MH |
1197 | } else { |
1198 | la->l2_psm = l2cap_pi(sk)->sport; | |
1da177e4 | 1199 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
b4324b5d | 1200 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
f29972de | 1201 | } |
1da177e4 | 1202 | |
1da177e4 LT |
1203 | return 0; |
1204 | } | |
1205 | ||
e90bac06 GP |
1206 | static void l2cap_monitor_timeout(unsigned long arg) |
1207 | { | |
1208 | struct sock *sk = (void *) arg; | |
1209 | u16 control; | |
1210 | ||
e686219a | 1211 | bh_lock_sock(sk); |
e90bac06 GP |
1212 | if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { |
1213 | l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk); | |
1214 | return; | |
1215 | } | |
1216 | ||
1217 | l2cap_pi(sk)->retry_count++; | |
1218 | __mod_monitor_timer(); | |
1219 | ||
1220 | control = L2CAP_CTRL_POLL; | |
7e743090 | 1221 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); |
e686219a | 1222 | bh_unlock_sock(sk); |
e90bac06 GP |
1223 | } |
1224 | ||
1225 | static void l2cap_retrans_timeout(unsigned long arg) | |
1226 | { | |
1227 | struct sock *sk = (void *) arg; | |
1228 | u16 control; | |
1229 | ||
e686219a | 1230 | bh_lock_sock(sk); |
e90bac06 GP |
1231 | l2cap_pi(sk)->retry_count = 1; |
1232 | __mod_monitor_timer(); | |
1233 | ||
1234 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
1235 | ||
1236 | control = L2CAP_CTRL_POLL; | |
7e743090 | 1237 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); |
e686219a | 1238 | bh_unlock_sock(sk); |
e90bac06 GP |
1239 | } |
1240 | ||
1c2acffb | 1241 | static void l2cap_drop_acked_frames(struct sock *sk) |
1da177e4 | 1242 | { |
1c2acffb | 1243 | struct sk_buff *skb; |
1da177e4 | 1244 | |
1c2acffb GP |
1245 | while ((skb = skb_peek(TX_QUEUE(sk)))) { |
1246 | if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq) | |
1247 | break; | |
1da177e4 | 1248 | |
1c2acffb GP |
1249 | skb = skb_dequeue(TX_QUEUE(sk)); |
1250 | kfree_skb(skb); | |
1da177e4 | 1251 | |
1c2acffb GP |
1252 | l2cap_pi(sk)->unacked_frames--; |
1253 | } | |
1da177e4 | 1254 | |
e90bac06 GP |
1255 | if (!l2cap_pi(sk)->unacked_frames) |
1256 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
1257 | ||
1c2acffb GP |
1258 | return; |
1259 | } | |
1da177e4 | 1260 | |
1c2acffb GP |
1261 | static inline int l2cap_do_send(struct sock *sk, struct sk_buff *skb) |
1262 | { | |
1263 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1264 | int err; | |
1265 | ||
1266 | BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len); | |
1da177e4 | 1267 | |
1c2acffb GP |
1268 | err = hci_send_acl(pi->conn->hcon, skb, 0); |
1269 | if (err < 0) | |
1270 | kfree_skb(skb); | |
1271 | ||
1272 | return err; | |
1273 | } | |
1274 | ||
6840ed07 GP |
1275 | static int l2cap_streaming_send(struct sock *sk) |
1276 | { | |
1277 | struct sk_buff *skb, *tx_skb; | |
1278 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1279 | u16 control, fcs; |
6840ed07 GP |
1280 | int err; |
1281 | ||
1282 | while ((skb = sk->sk_send_head)) { | |
1283 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1284 | ||
1285 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
1286 | control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; | |
1287 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1288 | ||
fcc203c3 GP |
1289 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { |
1290 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1291 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1292 | } | |
1293 | ||
6840ed07 GP |
1294 | err = l2cap_do_send(sk, tx_skb); |
1295 | if (err < 0) { | |
1296 | l2cap_send_disconn_req(pi->conn, sk); | |
1297 | return err; | |
1298 | } | |
1299 | ||
1300 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1301 | ||
1302 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1303 | sk->sk_send_head = NULL; | |
1304 | else | |
1305 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
1306 | ||
1307 | skb = skb_dequeue(TX_QUEUE(sk)); | |
1308 | kfree_skb(skb); | |
1309 | } | |
1310 | return 0; | |
1311 | } | |
1312 | ||
8f17154f GP |
1313 | static int l2cap_retransmit_frame(struct sock *sk, u8 tx_seq) |
1314 | { | |
1315 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1316 | struct sk_buff *skb, *tx_skb; | |
1317 | u16 control, fcs; | |
1318 | int err; | |
1319 | ||
1320 | skb = skb_peek(TX_QUEUE(sk)); | |
1321 | do { | |
1322 | if (bt_cb(skb)->tx_seq != tx_seq) { | |
1323 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1324 | break; | |
1325 | skb = skb_queue_next(TX_QUEUE(sk), skb); | |
1326 | continue; | |
1327 | } | |
1328 | ||
1329 | if (pi->remote_max_tx && | |
1330 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
1331 | l2cap_send_disconn_req(pi->conn, sk); | |
1332 | break; | |
1333 | } | |
1334 | ||
1335 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1336 | bt_cb(skb)->retries++; | |
1337 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
9f121a5a | 1338 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
8f17154f GP |
1339 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
1340 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1341 | ||
1342 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { | |
1343 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1344 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1345 | } | |
1346 | ||
1347 | err = l2cap_do_send(sk, tx_skb); | |
1348 | if (err < 0) { | |
1349 | l2cap_send_disconn_req(pi->conn, sk); | |
1350 | return err; | |
1351 | } | |
1352 | break; | |
1353 | } while(1); | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1c2acffb GP |
1357 | static int l2cap_ertm_send(struct sock *sk) |
1358 | { | |
1359 | struct sk_buff *skb, *tx_skb; | |
1360 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1361 | u16 control, fcs; |
1c2acffb GP |
1362 | int err; |
1363 | ||
e90bac06 GP |
1364 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
1365 | return 0; | |
1366 | ||
f64f9e71 JP |
1367 | while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk)) && |
1368 | !(pi->conn_state & L2CAP_CONN_REMOTE_BUSY)) { | |
1c2acffb GP |
1369 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
1370 | ||
e90bac06 GP |
1371 | if (pi->remote_max_tx && |
1372 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
1373 | l2cap_send_disconn_req(pi->conn, sk); | |
1374 | break; | |
1375 | } | |
1376 | ||
1377 | bt_cb(skb)->retries++; | |
1378 | ||
1c2acffb | 1379 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
9f121a5a | 1380 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
1c2acffb GP |
1381 | | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
1382 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1383 | ||
e90bac06 | 1384 | |
fcc203c3 GP |
1385 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { |
1386 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); | |
1387 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); | |
1388 | } | |
1389 | ||
1c2acffb GP |
1390 | err = l2cap_do_send(sk, tx_skb); |
1391 | if (err < 0) { | |
1392 | l2cap_send_disconn_req(pi->conn, sk); | |
1393 | return err; | |
1394 | } | |
e90bac06 | 1395 | __mod_retrans_timer(); |
1c2acffb GP |
1396 | |
1397 | bt_cb(skb)->tx_seq = pi->next_tx_seq; | |
1398 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1399 | ||
1400 | pi->unacked_frames++; | |
1401 | ||
1402 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1403 | sk->sk_send_head = NULL; | |
1404 | else | |
1405 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
1406 | } | |
1407 | ||
1408 | return 0; | |
1409 | } | |
1410 | ||
1411 | static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb) | |
1412 | { | |
1413 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1414 | struct sk_buff **frag; | |
1415 | int err, sent = 0; | |
1da177e4 LT |
1416 | |
1417 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
1c2acffb | 1418 | return -EFAULT; |
1da177e4 LT |
1419 | } |
1420 | ||
1421 | sent += count; | |
1422 | len -= count; | |
1423 | ||
1424 | /* Continuation fragments (no L2CAP header) */ | |
1425 | frag = &skb_shinfo(skb)->frag_list; | |
1426 | while (len) { | |
1427 | count = min_t(unsigned int, conn->mtu, len); | |
1428 | ||
1429 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1430 | if (!*frag) | |
1c2acffb GP |
1431 | return -EFAULT; |
1432 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) | |
1433 | return -EFAULT; | |
1da177e4 LT |
1434 | |
1435 | sent += count; | |
1436 | len -= count; | |
1437 | ||
1438 | frag = &(*frag)->next; | |
1439 | } | |
1da177e4 LT |
1440 | |
1441 | return sent; | |
1c2acffb | 1442 | } |
1da177e4 | 1443 | |
1c2acffb GP |
1444 | static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
1445 | { | |
1446 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1447 | struct sk_buff *skb; | |
1448 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1449 | struct l2cap_hdr *lh; | |
1450 | ||
1451 | BT_DBG("sk %p len %d", sk, (int)len); | |
1452 | ||
1453 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1454 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1455 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1456 | if (!skb) | |
1457 | return ERR_PTR(-ENOMEM); | |
1458 | ||
1459 | /* Create L2CAP header */ | |
1460 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1461 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1462 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1463 | put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2)); | |
1464 | ||
1465 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1466 | if (unlikely(err < 0)) { | |
1467 | kfree_skb(skb); | |
1468 | return ERR_PTR(err); | |
1469 | } | |
1470 | return skb; | |
1471 | } | |
1472 | ||
1473 | static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len) | |
1474 | { | |
1475 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1476 | struct sk_buff *skb; | |
1477 | int err, count, hlen = L2CAP_HDR_SIZE; | |
1478 | struct l2cap_hdr *lh; | |
1479 | ||
1480 | BT_DBG("sk %p len %d", sk, (int)len); | |
1481 | ||
1482 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1483 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1484 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1485 | if (!skb) | |
1486 | return ERR_PTR(-ENOMEM); | |
1487 | ||
1488 | /* Create L2CAP header */ | |
1489 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1490 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1491 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1492 | ||
1493 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1494 | if (unlikely(err < 0)) { | |
1495 | kfree_skb(skb); | |
1496 | return ERR_PTR(err); | |
1497 | } | |
1498 | return skb; | |
1499 | } | |
1500 | ||
6840ed07 | 1501 | static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
1c2acffb GP |
1502 | { |
1503 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1504 | struct sk_buff *skb; | |
1505 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1506 | struct l2cap_hdr *lh; | |
1507 | ||
1508 | BT_DBG("sk %p len %d", sk, (int)len); | |
1509 | ||
c74e560c GP |
1510 | if (sdulen) |
1511 | hlen += 2; | |
1512 | ||
fcc203c3 GP |
1513 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1514 | hlen += 2; | |
1515 | ||
1c2acffb GP |
1516 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
1517 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1518 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1519 | if (!skb) | |
1520 | return ERR_PTR(-ENOMEM); | |
1521 | ||
1522 | /* Create L2CAP header */ | |
1523 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1524 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1525 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1526 | put_unaligned_le16(control, skb_put(skb, 2)); | |
c74e560c GP |
1527 | if (sdulen) |
1528 | put_unaligned_le16(sdulen, skb_put(skb, 2)); | |
1c2acffb GP |
1529 | |
1530 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1531 | if (unlikely(err < 0)) { | |
1532 | kfree_skb(skb); | |
1533 | return ERR_PTR(err); | |
1534 | } | |
e90bac06 | 1535 | |
fcc203c3 GP |
1536 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1537 | put_unaligned_le16(0, skb_put(skb, 2)); | |
1538 | ||
e90bac06 | 1539 | bt_cb(skb)->retries = 0; |
1c2acffb | 1540 | return skb; |
1da177e4 LT |
1541 | } |
1542 | ||
c74e560c GP |
1543 | static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len) |
1544 | { | |
1545 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1546 | struct sk_buff *skb; | |
1547 | struct sk_buff_head sar_queue; | |
1548 | u16 control; | |
1549 | size_t size = 0; | |
1550 | ||
1551 | __skb_queue_head_init(&sar_queue); | |
1552 | control = L2CAP_SDU_START; | |
6840ed07 | 1553 | skb = l2cap_create_iframe_pdu(sk, msg, pi->max_pdu_size, control, len); |
c74e560c GP |
1554 | if (IS_ERR(skb)) |
1555 | return PTR_ERR(skb); | |
1556 | ||
1557 | __skb_queue_tail(&sar_queue, skb); | |
1558 | len -= pi->max_pdu_size; | |
1559 | size +=pi->max_pdu_size; | |
1560 | control = 0; | |
1561 | ||
1562 | while (len > 0) { | |
1563 | size_t buflen; | |
1564 | ||
1565 | if (len > pi->max_pdu_size) { | |
1566 | control |= L2CAP_SDU_CONTINUE; | |
1567 | buflen = pi->max_pdu_size; | |
1568 | } else { | |
1569 | control |= L2CAP_SDU_END; | |
1570 | buflen = len; | |
1571 | } | |
1572 | ||
6840ed07 | 1573 | skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0); |
c74e560c GP |
1574 | if (IS_ERR(skb)) { |
1575 | skb_queue_purge(&sar_queue); | |
1576 | return PTR_ERR(skb); | |
1577 | } | |
1578 | ||
1579 | __skb_queue_tail(&sar_queue, skb); | |
1580 | len -= buflen; | |
1581 | size += buflen; | |
1582 | control = 0; | |
1583 | } | |
1584 | skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk)); | |
1585 | if (sk->sk_send_head == NULL) | |
1586 | sk->sk_send_head = sar_queue.next; | |
1587 | ||
1588 | return size; | |
1589 | } | |
1590 | ||
1da177e4 LT |
1591 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
1592 | { | |
1593 | struct sock *sk = sock->sk; | |
1c2acffb GP |
1594 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
1595 | struct sk_buff *skb; | |
1596 | u16 control; | |
1597 | int err; | |
1da177e4 LT |
1598 | |
1599 | BT_DBG("sock %p, sk %p", sock, sk); | |
1600 | ||
c1cbe4b7 BL |
1601 | err = sock_error(sk); |
1602 | if (err) | |
1603 | return err; | |
1da177e4 LT |
1604 | |
1605 | if (msg->msg_flags & MSG_OOB) | |
1606 | return -EOPNOTSUPP; | |
1607 | ||
1608 | /* Check outgoing MTU */ | |
f64f9e71 JP |
1609 | if (sk->sk_type == SOCK_SEQPACKET && pi->mode == L2CAP_MODE_BASIC && |
1610 | len > pi->omtu) | |
1da177e4 LT |
1611 | return -EINVAL; |
1612 | ||
1613 | lock_sock(sk); | |
1614 | ||
1c2acffb | 1615 | if (sk->sk_state != BT_CONNECTED) { |
1da177e4 | 1616 | err = -ENOTCONN; |
1c2acffb GP |
1617 | goto done; |
1618 | } | |
1da177e4 | 1619 | |
1c2acffb GP |
1620 | /* Connectionless channel */ |
1621 | if (sk->sk_type == SOCK_DGRAM) { | |
1622 | skb = l2cap_create_connless_pdu(sk, msg, len); | |
1623 | err = l2cap_do_send(sk, skb); | |
1624 | goto done; | |
1625 | } | |
1626 | ||
1627 | switch (pi->mode) { | |
1628 | case L2CAP_MODE_BASIC: | |
1629 | /* Create a basic PDU */ | |
1630 | skb = l2cap_create_basic_pdu(sk, msg, len); | |
1631 | if (IS_ERR(skb)) { | |
1632 | err = PTR_ERR(skb); | |
1633 | goto done; | |
1634 | } | |
1635 | ||
1636 | err = l2cap_do_send(sk, skb); | |
1637 | if (!err) | |
1638 | err = len; | |
1639 | break; | |
1640 | ||
1641 | case L2CAP_MODE_ERTM: | |
6840ed07 | 1642 | case L2CAP_MODE_STREAMING: |
1c2acffb | 1643 | /* Entire SDU fits into one PDU */ |
c74e560c | 1644 | if (len <= pi->max_pdu_size) { |
1c2acffb | 1645 | control = L2CAP_SDU_UNSEGMENTED; |
6840ed07 | 1646 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
1c2acffb GP |
1647 | if (IS_ERR(skb)) { |
1648 | err = PTR_ERR(skb); | |
1649 | goto done; | |
1650 | } | |
c74e560c GP |
1651 | __skb_queue_tail(TX_QUEUE(sk), skb); |
1652 | if (sk->sk_send_head == NULL) | |
1653 | sk->sk_send_head = skb; | |
1c2acffb | 1654 | } else { |
c74e560c GP |
1655 | /* Segment SDU into multiples PDUs */ |
1656 | err = l2cap_sar_segment_sdu(sk, msg, len); | |
1657 | if (err < 0) | |
1658 | goto done; | |
1c2acffb | 1659 | } |
1c2acffb | 1660 | |
6840ed07 GP |
1661 | if (pi->mode == L2CAP_MODE_STREAMING) |
1662 | err = l2cap_streaming_send(sk); | |
1663 | else | |
1664 | err = l2cap_ertm_send(sk); | |
1665 | ||
1c2acffb GP |
1666 | if (!err) |
1667 | err = len; | |
1668 | break; | |
1669 | ||
1670 | default: | |
1671 | BT_DBG("bad state %1.1x", pi->mode); | |
1672 | err = -EINVAL; | |
1673 | } | |
1674 | ||
1675 | done: | |
1da177e4 LT |
1676 | release_sock(sk); |
1677 | return err; | |
1678 | } | |
1679 | ||
f66dc81f MH |
1680 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1681 | { | |
1682 | struct sock *sk = sock->sk; | |
1683 | ||
1684 | lock_sock(sk); | |
1685 | ||
1686 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1687 | struct l2cap_conn_rsp rsp; | |
1688 | ||
1689 | sk->sk_state = BT_CONFIG; | |
1690 | ||
1691 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1692 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1693 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1694 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1695 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1696 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1697 | ||
1698 | release_sock(sk); | |
1699 | return 0; | |
1700 | } | |
1701 | ||
1702 | release_sock(sk); | |
1703 | ||
1704 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1705 | } | |
1706 | ||
b7058842 | 1707 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
1708 | { |
1709 | struct sock *sk = sock->sk; | |
1710 | struct l2cap_options opts; | |
f29972de | 1711 | int len, err = 0; |
1da177e4 LT |
1712 | u32 opt; |
1713 | ||
1714 | BT_DBG("sk %p", sk); | |
1715 | ||
1716 | lock_sock(sk); | |
1717 | ||
1718 | switch (optname) { | |
1719 | case L2CAP_OPTIONS: | |
0878b666 MH |
1720 | opts.imtu = l2cap_pi(sk)->imtu; |
1721 | opts.omtu = l2cap_pi(sk)->omtu; | |
1722 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1723 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1724 | opts.fcs = l2cap_pi(sk)->fcs; |
0878b666 | 1725 | |
1da177e4 LT |
1726 | len = min_t(unsigned int, sizeof(opts), optlen); |
1727 | if (copy_from_user((char *) &opts, optval, len)) { | |
1728 | err = -EFAULT; | |
1729 | break; | |
1730 | } | |
0878b666 | 1731 | |
c6b03cf9 MH |
1732 | l2cap_pi(sk)->imtu = opts.imtu; |
1733 | l2cap_pi(sk)->omtu = opts.omtu; | |
1734 | l2cap_pi(sk)->mode = opts.mode; | |
fcc203c3 | 1735 | l2cap_pi(sk)->fcs = opts.fcs; |
1da177e4 LT |
1736 | break; |
1737 | ||
1738 | case L2CAP_LM: | |
1739 | if (get_user(opt, (u32 __user *) optval)) { | |
1740 | err = -EFAULT; | |
1741 | break; | |
1742 | } | |
1743 | ||
2af6b9d5 MH |
1744 | if (opt & L2CAP_LM_AUTH) |
1745 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
1746 | if (opt & L2CAP_LM_ENCRYPT) | |
1747 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
1748 | if (opt & L2CAP_LM_SECURE) | |
1749 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
1750 | ||
1751 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
1752 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
1753 | break; |
1754 | ||
1755 | default: | |
1756 | err = -ENOPROTOOPT; | |
1757 | break; | |
1758 | } | |
1759 | ||
1760 | release_sock(sk); | |
1761 | return err; | |
1762 | } | |
1763 | ||
b7058842 | 1764 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
d58daf42 MH |
1765 | { |
1766 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
1767 | struct bt_security sec; |
1768 | int len, err = 0; | |
f66dc81f | 1769 | u32 opt; |
d58daf42 MH |
1770 | |
1771 | BT_DBG("sk %p", sk); | |
1772 | ||
1773 | if (level == SOL_L2CAP) | |
1774 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
1775 | ||
0588d94f MH |
1776 | if (level != SOL_BLUETOOTH) |
1777 | return -ENOPROTOOPT; | |
1778 | ||
d58daf42 MH |
1779 | lock_sock(sk); |
1780 | ||
1781 | switch (optname) { | |
2af6b9d5 | 1782 | case BT_SECURITY: |
2526d3d8 | 1783 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1784 | err = -EINVAL; |
1785 | break; | |
1786 | } | |
1787 | ||
2af6b9d5 MH |
1788 | sec.level = BT_SECURITY_LOW; |
1789 | ||
1790 | len = min_t(unsigned int, sizeof(sec), optlen); | |
1791 | if (copy_from_user((char *) &sec, optval, len)) { | |
1792 | err = -EFAULT; | |
1793 | break; | |
1794 | } | |
1795 | ||
1796 | if (sec.level < BT_SECURITY_LOW || | |
1797 | sec.level > BT_SECURITY_HIGH) { | |
1798 | err = -EINVAL; | |
1799 | break; | |
1800 | } | |
1801 | ||
1802 | l2cap_pi(sk)->sec_level = sec.level; | |
1803 | break; | |
1804 | ||
f66dc81f MH |
1805 | case BT_DEFER_SETUP: |
1806 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1807 | err = -EINVAL; | |
1808 | break; | |
1809 | } | |
1810 | ||
1811 | if (get_user(opt, (u32 __user *) optval)) { | |
1812 | err = -EFAULT; | |
1813 | break; | |
1814 | } | |
1815 | ||
1816 | bt_sk(sk)->defer_setup = opt; | |
1817 | break; | |
1818 | ||
d58daf42 MH |
1819 | default: |
1820 | err = -ENOPROTOOPT; | |
1821 | break; | |
1822 | } | |
1823 | ||
1824 | release_sock(sk); | |
1825 | return err; | |
1826 | } | |
1827 | ||
1828 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
1829 | { |
1830 | struct sock *sk = sock->sk; | |
1831 | struct l2cap_options opts; | |
1832 | struct l2cap_conninfo cinfo; | |
1833 | int len, err = 0; | |
2af6b9d5 | 1834 | u32 opt; |
1da177e4 LT |
1835 | |
1836 | BT_DBG("sk %p", sk); | |
1837 | ||
1838 | if (get_user(len, optlen)) | |
1839 | return -EFAULT; | |
1840 | ||
1841 | lock_sock(sk); | |
1842 | ||
1843 | switch (optname) { | |
1844 | case L2CAP_OPTIONS: | |
1845 | opts.imtu = l2cap_pi(sk)->imtu; | |
1846 | opts.omtu = l2cap_pi(sk)->omtu; | |
1847 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1848 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1849 | opts.fcs = l2cap_pi(sk)->fcs; |
1da177e4 LT |
1850 | |
1851 | len = min_t(unsigned int, len, sizeof(opts)); | |
1852 | if (copy_to_user(optval, (char *) &opts, len)) | |
1853 | err = -EFAULT; | |
1854 | ||
1855 | break; | |
1856 | ||
1857 | case L2CAP_LM: | |
2af6b9d5 MH |
1858 | switch (l2cap_pi(sk)->sec_level) { |
1859 | case BT_SECURITY_LOW: | |
1860 | opt = L2CAP_LM_AUTH; | |
1861 | break; | |
1862 | case BT_SECURITY_MEDIUM: | |
1863 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
1864 | break; | |
1865 | case BT_SECURITY_HIGH: | |
1866 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
1867 | L2CAP_LM_SECURE; | |
1868 | break; | |
1869 | default: | |
1870 | opt = 0; | |
1871 | break; | |
1872 | } | |
1873 | ||
1874 | if (l2cap_pi(sk)->role_switch) | |
1875 | opt |= L2CAP_LM_MASTER; | |
1876 | ||
1877 | if (l2cap_pi(sk)->force_reliable) | |
1878 | opt |= L2CAP_LM_RELIABLE; | |
1879 | ||
1880 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
1881 | err = -EFAULT; |
1882 | break; | |
1883 | ||
1884 | case L2CAP_CONNINFO: | |
f66dc81f MH |
1885 | if (sk->sk_state != BT_CONNECTED && |
1886 | !(sk->sk_state == BT_CONNECT2 && | |
1887 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
1888 | err = -ENOTCONN; |
1889 | break; | |
1890 | } | |
1891 | ||
1892 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
1893 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
1894 | ||
1895 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
1896 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
1897 | err = -EFAULT; | |
1898 | ||
1899 | break; | |
1900 | ||
1901 | default: | |
1902 | err = -ENOPROTOOPT; | |
1903 | break; | |
1904 | } | |
1905 | ||
1906 | release_sock(sk); | |
1907 | return err; | |
1908 | } | |
1909 | ||
d58daf42 MH |
1910 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
1911 | { | |
1912 | struct sock *sk = sock->sk; | |
2af6b9d5 | 1913 | struct bt_security sec; |
d58daf42 MH |
1914 | int len, err = 0; |
1915 | ||
1916 | BT_DBG("sk %p", sk); | |
1917 | ||
1918 | if (level == SOL_L2CAP) | |
1919 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
1920 | ||
0588d94f MH |
1921 | if (level != SOL_BLUETOOTH) |
1922 | return -ENOPROTOOPT; | |
1923 | ||
d58daf42 MH |
1924 | if (get_user(len, optlen)) |
1925 | return -EFAULT; | |
1926 | ||
1927 | lock_sock(sk); | |
1928 | ||
1929 | switch (optname) { | |
2af6b9d5 | 1930 | case BT_SECURITY: |
2526d3d8 | 1931 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1932 | err = -EINVAL; |
1933 | break; | |
1934 | } | |
1935 | ||
2af6b9d5 MH |
1936 | sec.level = l2cap_pi(sk)->sec_level; |
1937 | ||
1938 | len = min_t(unsigned int, len, sizeof(sec)); | |
1939 | if (copy_to_user(optval, (char *) &sec, len)) | |
1940 | err = -EFAULT; | |
1941 | ||
1942 | break; | |
1943 | ||
f66dc81f MH |
1944 | case BT_DEFER_SETUP: |
1945 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1946 | err = -EINVAL; | |
1947 | break; | |
1948 | } | |
1949 | ||
1950 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
1951 | err = -EFAULT; | |
1952 | ||
1953 | break; | |
1954 | ||
d58daf42 MH |
1955 | default: |
1956 | err = -ENOPROTOOPT; | |
1957 | break; | |
1958 | } | |
1959 | ||
1960 | release_sock(sk); | |
1961 | return err; | |
1962 | } | |
1963 | ||
1da177e4 LT |
1964 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1965 | { | |
1966 | struct sock *sk = sock->sk; | |
1967 | int err = 0; | |
1968 | ||
1969 | BT_DBG("sock %p, sk %p", sock, sk); | |
1970 | ||
1971 | if (!sk) | |
1972 | return 0; | |
1973 | ||
1974 | lock_sock(sk); | |
1975 | if (!sk->sk_shutdown) { | |
1976 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1977 | l2cap_sock_clear_timer(sk); | |
1978 | __l2cap_sock_close(sk, 0); | |
1979 | ||
1980 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
1981 | err = bt_sock_wait_state(sk, BT_CLOSED, |
1982 | sk->sk_lingertime); | |
1da177e4 LT |
1983 | } |
1984 | release_sock(sk); | |
1985 | return err; | |
1986 | } | |
1987 | ||
1988 | static int l2cap_sock_release(struct socket *sock) | |
1989 | { | |
1990 | struct sock *sk = sock->sk; | |
1991 | int err; | |
1992 | ||
1993 | BT_DBG("sock %p, sk %p", sock, sk); | |
1994 | ||
1995 | if (!sk) | |
1996 | return 0; | |
1997 | ||
1998 | err = l2cap_sock_shutdown(sock, 2); | |
1999 | ||
2000 | sock_orphan(sk); | |
2001 | l2cap_sock_kill(sk); | |
2002 | return err; | |
2003 | } | |
2004 | ||
1da177e4 LT |
2005 | static void l2cap_chan_ready(struct sock *sk) |
2006 | { | |
2007 | struct sock *parent = bt_sk(sk)->parent; | |
2008 | ||
2009 | BT_DBG("sk %p, parent %p", sk, parent); | |
2010 | ||
2011 | l2cap_pi(sk)->conf_state = 0; | |
2012 | l2cap_sock_clear_timer(sk); | |
2013 | ||
2014 | if (!parent) { | |
2015 | /* Outgoing channel. | |
2016 | * Wake up socket sleeping on connect. | |
2017 | */ | |
2018 | sk->sk_state = BT_CONNECTED; | |
2019 | sk->sk_state_change(sk); | |
2020 | } else { | |
2021 | /* Incoming channel. | |
2022 | * Wake up socket sleeping on accept. | |
2023 | */ | |
2024 | parent->sk_data_ready(parent, 0); | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | /* Copy frame to all raw sockets on that connection */ | |
2029 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
2030 | { | |
2031 | struct l2cap_chan_list *l = &conn->chan_list; | |
2032 | struct sk_buff *nskb; | |
af05b30b | 2033 | struct sock *sk; |
1da177e4 LT |
2034 | |
2035 | BT_DBG("conn %p", conn); | |
2036 | ||
2037 | read_lock(&l->lock); | |
2038 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2039 | if (sk->sk_type != SOCK_RAW) | |
2040 | continue; | |
2041 | ||
2042 | /* Don't send frame to the socket it came from */ | |
2043 | if (skb->sk == sk) | |
2044 | continue; | |
af05b30b GP |
2045 | nskb = skb_clone(skb, GFP_ATOMIC); |
2046 | if (!nskb) | |
1da177e4 LT |
2047 | continue; |
2048 | ||
2049 | if (sock_queue_rcv_skb(sk, nskb)) | |
2050 | kfree_skb(nskb); | |
2051 | } | |
2052 | read_unlock(&l->lock); | |
2053 | } | |
2054 | ||
2055 | /* ---- L2CAP signalling commands ---- */ | |
2056 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
2057 | u8 code, u8 ident, u16 dlen, void *data) | |
2058 | { | |
2059 | struct sk_buff *skb, **frag; | |
2060 | struct l2cap_cmd_hdr *cmd; | |
2061 | struct l2cap_hdr *lh; | |
2062 | int len, count; | |
2063 | ||
af05b30b GP |
2064 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
2065 | conn, code, ident, dlen); | |
1da177e4 LT |
2066 | |
2067 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
2068 | count = min_t(unsigned int, conn->mtu, len); | |
2069 | ||
2070 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
2071 | if (!skb) | |
2072 | return NULL; | |
2073 | ||
2074 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c | 2075 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
8db4dc46 | 2076 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
1da177e4 LT |
2077 | |
2078 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
2079 | cmd->code = code; | |
2080 | cmd->ident = ident; | |
aca3192c | 2081 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
2082 | |
2083 | if (dlen) { | |
2084 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
2085 | memcpy(skb_put(skb, count), data, count); | |
2086 | data += count; | |
2087 | } | |
2088 | ||
2089 | len -= skb->len; | |
2090 | ||
2091 | /* Continuation fragments (no L2CAP header) */ | |
2092 | frag = &skb_shinfo(skb)->frag_list; | |
2093 | while (len) { | |
2094 | count = min_t(unsigned int, conn->mtu, len); | |
2095 | ||
2096 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
2097 | if (!*frag) | |
2098 | goto fail; | |
2099 | ||
2100 | memcpy(skb_put(*frag, count), data, count); | |
2101 | ||
2102 | len -= count; | |
2103 | data += count; | |
2104 | ||
2105 | frag = &(*frag)->next; | |
2106 | } | |
2107 | ||
2108 | return skb; | |
2109 | ||
2110 | fail: | |
2111 | kfree_skb(skb); | |
2112 | return NULL; | |
2113 | } | |
2114 | ||
2115 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
2116 | { | |
2117 | struct l2cap_conf_opt *opt = *ptr; | |
2118 | int len; | |
2119 | ||
2120 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
2121 | *ptr += len; | |
2122 | ||
2123 | *type = opt->type; | |
2124 | *olen = opt->len; | |
2125 | ||
2126 | switch (opt->len) { | |
2127 | case 1: | |
2128 | *val = *((u8 *) opt->val); | |
2129 | break; | |
2130 | ||
2131 | case 2: | |
861d6882 | 2132 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
2133 | break; |
2134 | ||
2135 | case 4: | |
861d6882 | 2136 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
2137 | break; |
2138 | ||
2139 | default: | |
2140 | *val = (unsigned long) opt->val; | |
2141 | break; | |
2142 | } | |
2143 | ||
2144 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
2145 | return len; | |
2146 | } | |
2147 | ||
1da177e4 LT |
2148 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
2149 | { | |
2150 | struct l2cap_conf_opt *opt = *ptr; | |
2151 | ||
2152 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
2153 | ||
2154 | opt->type = type; | |
2155 | opt->len = len; | |
2156 | ||
2157 | switch (len) { | |
2158 | case 1: | |
2159 | *((u8 *) opt->val) = val; | |
2160 | break; | |
2161 | ||
2162 | case 2: | |
8e036fc3 | 2163 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
2164 | break; |
2165 | ||
2166 | case 4: | |
8e036fc3 | 2167 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
2168 | break; |
2169 | ||
2170 | default: | |
2171 | memcpy(opt->val, (void *) val, len); | |
2172 | break; | |
2173 | } | |
2174 | ||
2175 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
2176 | } | |
2177 | ||
0565c1c2 GP |
2178 | static inline void l2cap_ertm_init(struct sock *sk) |
2179 | { | |
2180 | l2cap_pi(sk)->expected_ack_seq = 0; | |
2181 | l2cap_pi(sk)->unacked_frames = 0; | |
2182 | l2cap_pi(sk)->buffer_seq = 0; | |
2183 | l2cap_pi(sk)->num_to_ack = 0; | |
2184 | ||
2185 | setup_timer(&l2cap_pi(sk)->retrans_timer, | |
2186 | l2cap_retrans_timeout, (unsigned long) sk); | |
2187 | setup_timer(&l2cap_pi(sk)->monitor_timer, | |
2188 | l2cap_monitor_timeout, (unsigned long) sk); | |
2189 | ||
2190 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
2191 | } | |
2192 | ||
f2fcfcd6 GP |
2193 | static int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
2194 | { | |
2195 | u32 local_feat_mask = l2cap_feat_mask; | |
2196 | if (enable_ertm) | |
6840ed07 | 2197 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
f2fcfcd6 GP |
2198 | |
2199 | switch (mode) { | |
2200 | case L2CAP_MODE_ERTM: | |
2201 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; | |
2202 | case L2CAP_MODE_STREAMING: | |
2203 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; | |
2204 | default: | |
2205 | return 0x00; | |
2206 | } | |
2207 | } | |
2208 | ||
2209 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) | |
2210 | { | |
2211 | switch (mode) { | |
2212 | case L2CAP_MODE_STREAMING: | |
2213 | case L2CAP_MODE_ERTM: | |
2214 | if (l2cap_mode_supported(mode, remote_feat_mask)) | |
2215 | return mode; | |
2216 | /* fall through */ | |
2217 | default: | |
2218 | return L2CAP_MODE_BASIC; | |
2219 | } | |
2220 | } | |
2221 | ||
1da177e4 LT |
2222 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
2223 | { | |
2224 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2225 | struct l2cap_conf_req *req = data; | |
a0e55a32 | 2226 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
1da177e4 LT |
2227 | void *ptr = req->data; |
2228 | ||
2229 | BT_DBG("sk %p", sk); | |
2230 | ||
f2fcfcd6 GP |
2231 | if (pi->num_conf_req || pi->num_conf_rsp) |
2232 | goto done; | |
2233 | ||
2234 | switch (pi->mode) { | |
2235 | case L2CAP_MODE_STREAMING: | |
2236 | case L2CAP_MODE_ERTM: | |
2237 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; | |
22121fc9 GP |
2238 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) |
2239 | l2cap_send_disconn_req(pi->conn, sk); | |
f2fcfcd6 GP |
2240 | break; |
2241 | default: | |
2242 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2243 | break; | |
2244 | } | |
2245 | ||
2246 | done: | |
65c7c491 MH |
2247 | switch (pi->mode) { |
2248 | case L2CAP_MODE_BASIC: | |
2249 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
2250 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
2251 | break; | |
2252 | ||
2253 | case L2CAP_MODE_ERTM: | |
2254 | rfc.mode = L2CAP_MODE_ERTM; | |
f2fcfcd6 | 2255 | rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW; |
e90bac06 | 2256 | rfc.max_transmit = L2CAP_DEFAULT_MAX_TX; |
f2fcfcd6 GP |
2257 | rfc.retrans_timeout = 0; |
2258 | rfc.monitor_timeout = 0; | |
c74e560c | 2259 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
f2fcfcd6 GP |
2260 | |
2261 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2262 | sizeof(rfc), (unsigned long) &rfc); | |
fcc203c3 GP |
2263 | |
2264 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) | |
2265 | break; | |
2266 | ||
2267 | if (pi->fcs == L2CAP_FCS_NONE || | |
2268 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2269 | pi->fcs = L2CAP_FCS_NONE; | |
2270 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2271 | } | |
f2fcfcd6 GP |
2272 | break; |
2273 | ||
2274 | case L2CAP_MODE_STREAMING: | |
2275 | rfc.mode = L2CAP_MODE_STREAMING; | |
2276 | rfc.txwin_size = 0; | |
2277 | rfc.max_transmit = 0; | |
2278 | rfc.retrans_timeout = 0; | |
2279 | rfc.monitor_timeout = 0; | |
c74e560c | 2280 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
65c7c491 MH |
2281 | |
2282 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2283 | sizeof(rfc), (unsigned long) &rfc); | |
fcc203c3 GP |
2284 | |
2285 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) | |
2286 | break; | |
2287 | ||
2288 | if (pi->fcs == L2CAP_FCS_NONE || | |
2289 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2290 | pi->fcs = L2CAP_FCS_NONE; | |
2291 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2292 | } | |
65c7c491 MH |
2293 | break; |
2294 | } | |
1da177e4 LT |
2295 | |
2296 | /* FIXME: Need actual value of the flush timeout */ | |
2297 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
2298 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
2299 | ||
aca3192c YH |
2300 | req->dcid = cpu_to_le16(pi->dcid); |
2301 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
2302 | |
2303 | return ptr - data; | |
2304 | } | |
2305 | ||
5dee9e7c | 2306 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
2307 | { |
2308 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
2309 | struct l2cap_conf_rsp *rsp = data; |
2310 | void *ptr = rsp->data; | |
2311 | void *req = pi->conf_req; | |
2312 | int len = pi->conf_len; | |
2313 | int type, hint, olen; | |
2314 | unsigned long val; | |
6464f35f | 2315 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 2316 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 2317 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 2318 | |
5dee9e7c | 2319 | BT_DBG("sk %p", sk); |
820ae1b8 | 2320 | |
5dee9e7c MH |
2321 | while (len >= L2CAP_CONF_OPT_SIZE) { |
2322 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 2323 | |
589d2746 | 2324 | hint = type & L2CAP_CONF_HINT; |
47ec1dcd | 2325 | type &= L2CAP_CONF_MASK; |
5dee9e7c MH |
2326 | |
2327 | switch (type) { | |
2328 | case L2CAP_CONF_MTU: | |
861d6882 | 2329 | mtu = val; |
5dee9e7c MH |
2330 | break; |
2331 | ||
2332 | case L2CAP_CONF_FLUSH_TO: | |
2333 | pi->flush_to = val; | |
2334 | break; | |
2335 | ||
2336 | case L2CAP_CONF_QOS: | |
2337 | break; | |
2338 | ||
6464f35f MH |
2339 | case L2CAP_CONF_RFC: |
2340 | if (olen == sizeof(rfc)) | |
2341 | memcpy(&rfc, (void *) val, olen); | |
2342 | break; | |
2343 | ||
fcc203c3 GP |
2344 | case L2CAP_CONF_FCS: |
2345 | if (val == L2CAP_FCS_NONE) | |
2346 | pi->conf_state |= L2CAP_CONF_NO_FCS_RECV; | |
2347 | ||
2348 | break; | |
2349 | ||
5dee9e7c MH |
2350 | default: |
2351 | if (hint) | |
2352 | break; | |
2353 | ||
2354 | result = L2CAP_CONF_UNKNOWN; | |
2355 | *((u8 *) ptr++) = type; | |
2356 | break; | |
2357 | } | |
2358 | } | |
2359 | ||
f2fcfcd6 GP |
2360 | if (pi->num_conf_rsp || pi->num_conf_req) |
2361 | goto done; | |
2362 | ||
2363 | switch (pi->mode) { | |
2364 | case L2CAP_MODE_STREAMING: | |
2365 | case L2CAP_MODE_ERTM: | |
2366 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; | |
2367 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) | |
2368 | return -ECONNREFUSED; | |
2369 | break; | |
2370 | default: | |
2371 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2372 | break; | |
2373 | } | |
2374 | ||
2375 | done: | |
2376 | if (pi->mode != rfc.mode) { | |
2377 | result = L2CAP_CONF_UNACCEPT; | |
2378 | rfc.mode = pi->mode; | |
2379 | ||
2380 | if (pi->num_conf_rsp == 1) | |
2381 | return -ECONNREFUSED; | |
2382 | ||
2383 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2384 | sizeof(rfc), (unsigned long) &rfc); | |
2385 | } | |
2386 | ||
2387 | ||
5dee9e7c MH |
2388 | if (result == L2CAP_CONF_SUCCESS) { |
2389 | /* Configure output options and let the other side know | |
2390 | * which ones we don't like. */ | |
2391 | ||
f2fcfcd6 GP |
2392 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
2393 | result = L2CAP_CONF_UNACCEPT; | |
2394 | else { | |
2395 | pi->omtu = mtu; | |
2396 | pi->conf_state |= L2CAP_CONF_MTU_DONE; | |
2397 | } | |
2398 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
6464f35f | 2399 | |
f2fcfcd6 GP |
2400 | switch (rfc.mode) { |
2401 | case L2CAP_MODE_BASIC: | |
2402 | pi->fcs = L2CAP_FCS_NONE; | |
2403 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
2404 | break; | |
2405 | ||
2406 | case L2CAP_MODE_ERTM: | |
2407 | pi->remote_tx_win = rfc.txwin_size; | |
2408 | pi->remote_max_tx = rfc.max_transmit; | |
2409 | pi->max_pdu_size = rfc.max_pdu_size; | |
2410 | ||
2411 | rfc.retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; | |
2412 | rfc.monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; | |
2413 | ||
2414 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2415 | |
2416 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2417 | sizeof(rfc), (unsigned long) &rfc); | |
2418 | ||
f2fcfcd6 GP |
2419 | break; |
2420 | ||
2421 | case L2CAP_MODE_STREAMING: | |
2422 | pi->remote_tx_win = rfc.txwin_size; | |
2423 | pi->max_pdu_size = rfc.max_pdu_size; | |
2424 | ||
2425 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2426 | |
2427 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2428 | sizeof(rfc), (unsigned long) &rfc); | |
2429 | ||
f2fcfcd6 GP |
2430 | break; |
2431 | ||
2432 | default: | |
5dee9e7c | 2433 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 2434 | |
6464f35f | 2435 | memset(&rfc, 0, sizeof(rfc)); |
f2fcfcd6 GP |
2436 | rfc.mode = pi->mode; |
2437 | } | |
6464f35f | 2438 | |
f2fcfcd6 GP |
2439 | if (result == L2CAP_CONF_SUCCESS) |
2440 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
2441 | } | |
5dee9e7c MH |
2442 | rsp->scid = cpu_to_le16(pi->dcid); |
2443 | rsp->result = cpu_to_le16(result); | |
2444 | rsp->flags = cpu_to_le16(0x0000); | |
2445 | ||
2446 | return ptr - data; | |
1da177e4 LT |
2447 | } |
2448 | ||
f2fcfcd6 GP |
2449 | static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result) |
2450 | { | |
2451 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2452 | struct l2cap_conf_req *req = data; | |
2453 | void *ptr = req->data; | |
2454 | int type, olen; | |
2455 | unsigned long val; | |
2456 | struct l2cap_conf_rfc rfc; | |
2457 | ||
2458 | BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data); | |
2459 | ||
2460 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2461 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2462 | ||
2463 | switch (type) { | |
2464 | case L2CAP_CONF_MTU: | |
2465 | if (val < L2CAP_DEFAULT_MIN_MTU) { | |
2466 | *result = L2CAP_CONF_UNACCEPT; | |
2467 | pi->omtu = L2CAP_DEFAULT_MIN_MTU; | |
2468 | } else | |
2469 | pi->omtu = val; | |
2470 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
2471 | break; | |
2472 | ||
2473 | case L2CAP_CONF_FLUSH_TO: | |
2474 | pi->flush_to = val; | |
2475 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, | |
2476 | 2, pi->flush_to); | |
2477 | break; | |
2478 | ||
2479 | case L2CAP_CONF_RFC: | |
2480 | if (olen == sizeof(rfc)) | |
2481 | memcpy(&rfc, (void *)val, olen); | |
2482 | ||
2483 | if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) && | |
2484 | rfc.mode != pi->mode) | |
2485 | return -ECONNREFUSED; | |
2486 | ||
2487 | pi->mode = rfc.mode; | |
2488 | pi->fcs = 0; | |
2489 | ||
2490 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2491 | sizeof(rfc), (unsigned long) &rfc); | |
2492 | break; | |
2493 | } | |
2494 | } | |
2495 | ||
2496 | if (*result == L2CAP_CONF_SUCCESS) { | |
2497 | switch (rfc.mode) { | |
2498 | case L2CAP_MODE_ERTM: | |
2499 | pi->remote_tx_win = rfc.txwin_size; | |
2500 | pi->retrans_timeout = rfc.retrans_timeout; | |
2501 | pi->monitor_timeout = rfc.monitor_timeout; | |
2502 | pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size); | |
2503 | break; | |
2504 | case L2CAP_MODE_STREAMING: | |
2505 | pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size); | |
2506 | break; | |
2507 | } | |
2508 | } | |
2509 | ||
2510 | req->dcid = cpu_to_le16(pi->dcid); | |
2511 | req->flags = cpu_to_le16(0x0000); | |
2512 | ||
2513 | return ptr - data; | |
2514 | } | |
2515 | ||
5dee9e7c | 2516 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
2517 | { |
2518 | struct l2cap_conf_rsp *rsp = data; | |
2519 | void *ptr = rsp->data; | |
1da177e4 | 2520 | |
5dee9e7c | 2521 | BT_DBG("sk %p", sk); |
1da177e4 | 2522 | |
aca3192c | 2523 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 2524 | rsp->result = cpu_to_le16(result); |
aca3192c | 2525 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
2526 | |
2527 | return ptr - data; | |
2528 | } | |
2529 | ||
4e8402a3 MH |
2530 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2531 | { | |
2532 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
2533 | ||
2534 | if (rej->reason != 0x0000) | |
2535 | return 0; | |
2536 | ||
2537 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
2538 | cmd->ident == conn->info_ident) { | |
4e8402a3 | 2539 | del_timer(&conn->info_timer); |
984947dc MH |
2540 | |
2541 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
e1027a7c | 2542 | conn->info_ident = 0; |
984947dc | 2543 | |
4e8402a3 MH |
2544 | l2cap_conn_start(conn); |
2545 | } | |
2546 | ||
2547 | return 0; | |
2548 | } | |
2549 | ||
1da177e4 LT |
2550 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2551 | { | |
2552 | struct l2cap_chan_list *list = &conn->chan_list; | |
2553 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
2554 | struct l2cap_conn_rsp rsp; | |
2555 | struct sock *sk, *parent; | |
e7c29cb1 | 2556 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
2557 | |
2558 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 2559 | __le16 psm = req->psm; |
1da177e4 LT |
2560 | |
2561 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
2562 | ||
2563 | /* Check if we have socket listening on psm */ | |
2564 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
2565 | if (!parent) { | |
2566 | result = L2CAP_CR_BAD_PSM; | |
2567 | goto sendresp; | |
2568 | } | |
2569 | ||
e7c29cb1 MH |
2570 | /* Check if the ACL is secure enough (if not SDP) */ |
2571 | if (psm != cpu_to_le16(0x0001) && | |
2572 | !hci_conn_check_link_mode(conn->hcon)) { | |
2950f21a | 2573 | conn->disc_reason = 0x05; |
e7c29cb1 MH |
2574 | result = L2CAP_CR_SEC_BLOCK; |
2575 | goto response; | |
2576 | } | |
2577 | ||
1da177e4 LT |
2578 | result = L2CAP_CR_NO_MEM; |
2579 | ||
2580 | /* Check for backlog size */ | |
2581 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 2582 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
2583 | goto response; |
2584 | } | |
2585 | ||
3b1e0a65 | 2586 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
2587 | if (!sk) |
2588 | goto response; | |
2589 | ||
fd1278d7 | 2590 | write_lock_bh(&list->lock); |
1da177e4 LT |
2591 | |
2592 | /* Check if we already have channel with that dcid */ | |
2593 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 2594 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2595 | sock_set_flag(sk, SOCK_ZAPPED); |
2596 | l2cap_sock_kill(sk); | |
2597 | goto response; | |
2598 | } | |
2599 | ||
2600 | hci_conn_hold(conn->hcon); | |
2601 | ||
2602 | l2cap_sock_init(sk, parent); | |
2603 | bacpy(&bt_sk(sk)->src, conn->src); | |
2604 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
2605 | l2cap_pi(sk)->psm = psm; | |
2606 | l2cap_pi(sk)->dcid = scid; | |
2607 | ||
2608 | __l2cap_chan_add(conn, sk, parent); | |
2609 | dcid = l2cap_pi(sk)->scid; | |
2610 | ||
2611 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
2612 | ||
1da177e4 LT |
2613 | l2cap_pi(sk)->ident = cmd->ident; |
2614 | ||
984947dc | 2615 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
2af6b9d5 | 2616 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
2617 | if (bt_sk(sk)->defer_setup) { |
2618 | sk->sk_state = BT_CONNECT2; | |
2619 | result = L2CAP_CR_PEND; | |
2620 | status = L2CAP_CS_AUTHOR_PEND; | |
2621 | parent->sk_data_ready(parent, 0); | |
2622 | } else { | |
2623 | sk->sk_state = BT_CONFIG; | |
2624 | result = L2CAP_CR_SUCCESS; | |
2625 | status = L2CAP_CS_NO_INFO; | |
2626 | } | |
79d554a6 MH |
2627 | } else { |
2628 | sk->sk_state = BT_CONNECT2; | |
2629 | result = L2CAP_CR_PEND; | |
2630 | status = L2CAP_CS_AUTHEN_PEND; | |
2631 | } | |
2632 | } else { | |
2633 | sk->sk_state = BT_CONNECT2; | |
2634 | result = L2CAP_CR_PEND; | |
2635 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
2636 | } |
2637 | ||
fd1278d7 | 2638 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2639 | |
2640 | response: | |
2641 | bh_unlock_sock(parent); | |
2642 | ||
2643 | sendresp: | |
aca3192c YH |
2644 | rsp.scid = cpu_to_le16(scid); |
2645 | rsp.dcid = cpu_to_le16(dcid); | |
2646 | rsp.result = cpu_to_le16(result); | |
2647 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 2648 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
2649 | |
2650 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
2651 | struct l2cap_info_req info; | |
2652 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2653 | ||
2654 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
2655 | conn->info_ident = l2cap_get_ident(conn); | |
2656 | ||
2657 | mod_timer(&conn->info_timer, jiffies + | |
2658 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
2659 | ||
2660 | l2cap_send_cmd(conn, conn->info_ident, | |
2661 | L2CAP_INFO_REQ, sizeof(info), &info); | |
2662 | } | |
2663 | ||
1da177e4 LT |
2664 | return 0; |
2665 | } | |
2666 | ||
2667 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2668 | { | |
2669 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
2670 | u16 scid, dcid, result, status; | |
2671 | struct sock *sk; | |
2672 | u8 req[128]; | |
2673 | ||
2674 | scid = __le16_to_cpu(rsp->scid); | |
2675 | dcid = __le16_to_cpu(rsp->dcid); | |
2676 | result = __le16_to_cpu(rsp->result); | |
2677 | status = __le16_to_cpu(rsp->status); | |
2678 | ||
2679 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
2680 | ||
2681 | if (scid) { | |
af05b30b GP |
2682 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2683 | if (!sk) | |
1da177e4 LT |
2684 | return 0; |
2685 | } else { | |
af05b30b GP |
2686 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
2687 | if (!sk) | |
1da177e4 LT |
2688 | return 0; |
2689 | } | |
2690 | ||
2691 | switch (result) { | |
2692 | case L2CAP_CR_SUCCESS: | |
2693 | sk->sk_state = BT_CONFIG; | |
2694 | l2cap_pi(sk)->ident = 0; | |
2695 | l2cap_pi(sk)->dcid = dcid; | |
2696 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
2697 | ||
6a8d3010 MH |
2698 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
2699 | ||
1da177e4 LT |
2700 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
2701 | l2cap_build_conf_req(sk, req), req); | |
f2fcfcd6 | 2702 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
2703 | break; |
2704 | ||
2705 | case L2CAP_CR_PEND: | |
6a8d3010 | 2706 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 LT |
2707 | break; |
2708 | ||
2709 | default: | |
2710 | l2cap_chan_del(sk, ECONNREFUSED); | |
2711 | break; | |
2712 | } | |
2713 | ||
2714 | bh_unlock_sock(sk); | |
2715 | return 0; | |
2716 | } | |
2717 | ||
88219a0f | 2718 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
2719 | { |
2720 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
2721 | u16 dcid, flags; | |
2722 | u8 rsp[64]; | |
2723 | struct sock *sk; | |
5dee9e7c | 2724 | int len; |
1da177e4 LT |
2725 | |
2726 | dcid = __le16_to_cpu(req->dcid); | |
2727 | flags = __le16_to_cpu(req->flags); | |
2728 | ||
2729 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
2730 | ||
af05b30b GP |
2731 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
2732 | if (!sk) | |
1da177e4 LT |
2733 | return -ENOENT; |
2734 | ||
354f60a9 MH |
2735 | if (sk->sk_state == BT_DISCONN) |
2736 | goto unlock; | |
2737 | ||
5dee9e7c | 2738 | /* Reject if config buffer is too small. */ |
88219a0f | 2739 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
2740 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
2741 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
2742 | l2cap_build_conf_rsp(sk, rsp, | |
2743 | L2CAP_CONF_REJECT, flags), rsp); | |
2744 | goto unlock; | |
2745 | } | |
2746 | ||
2747 | /* Store config. */ | |
2748 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
2749 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
2750 | |
2751 | if (flags & 0x0001) { | |
2752 | /* Incomplete config. Send empty response. */ | |
2753 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
2754 | l2cap_build_conf_rsp(sk, rsp, |
2755 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
2756 | goto unlock; |
2757 | } | |
2758 | ||
2759 | /* Complete config. */ | |
5dee9e7c | 2760 | len = l2cap_parse_conf_req(sk, rsp); |
f2fcfcd6 | 2761 | if (len < 0) { |
22121fc9 | 2762 | l2cap_send_disconn_req(conn, sk); |
1da177e4 | 2763 | goto unlock; |
f2fcfcd6 | 2764 | } |
1da177e4 | 2765 | |
5dee9e7c | 2766 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
f2fcfcd6 | 2767 | l2cap_pi(sk)->num_conf_rsp++; |
5dee9e7c | 2768 | |
5dee9e7c MH |
2769 | /* Reset config buffer. */ |
2770 | l2cap_pi(sk)->conf_len = 0; | |
2771 | ||
876d9484 MH |
2772 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
2773 | goto unlock; | |
2774 | ||
1da177e4 | 2775 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
f64f9e71 JP |
2776 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
2777 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
fcc203c3 GP |
2778 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
2779 | ||
1da177e4 | 2780 | sk->sk_state = BT_CONNECTED; |
e90bac06 | 2781 | |
0565c1c2 GP |
2782 | l2cap_pi(sk)->next_tx_seq = 0; |
2783 | l2cap_pi(sk)->expected_tx_seq = 0; | |
1c2acffb | 2784 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
2785 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
2786 | l2cap_ertm_init(sk); | |
2787 | ||
1da177e4 | 2788 | l2cap_chan_ready(sk); |
876d9484 MH |
2789 | goto unlock; |
2790 | } | |
2791 | ||
2792 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 2793 | u8 buf[64]; |
1da177e4 | 2794 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 2795 | l2cap_build_conf_req(sk, buf), buf); |
f2fcfcd6 | 2796 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
2797 | } |
2798 | ||
2799 | unlock: | |
2800 | bh_unlock_sock(sk); | |
2801 | return 0; | |
2802 | } | |
2803 | ||
2804 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2805 | { | |
2806 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
2807 | u16 scid, flags, result; | |
2808 | struct sock *sk; | |
2809 | ||
2810 | scid = __le16_to_cpu(rsp->scid); | |
2811 | flags = __le16_to_cpu(rsp->flags); | |
2812 | result = __le16_to_cpu(rsp->result); | |
2813 | ||
af05b30b GP |
2814 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
2815 | scid, flags, result); | |
1da177e4 | 2816 | |
af05b30b GP |
2817 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2818 | if (!sk) | |
1da177e4 LT |
2819 | return 0; |
2820 | ||
2821 | switch (result) { | |
2822 | case L2CAP_CONF_SUCCESS: | |
2823 | break; | |
2824 | ||
2825 | case L2CAP_CONF_UNACCEPT: | |
f2fcfcd6 GP |
2826 | if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
2827 | int len = cmd->len - sizeof(*rsp); | |
2828 | char req[64]; | |
2829 | ||
2830 | /* throw out any old stored conf requests */ | |
2831 | result = L2CAP_CONF_SUCCESS; | |
2832 | len = l2cap_parse_conf_rsp(sk, rsp->data, | |
2833 | len, req, &result); | |
2834 | if (len < 0) { | |
22121fc9 | 2835 | l2cap_send_disconn_req(conn, sk); |
f2fcfcd6 GP |
2836 | goto done; |
2837 | } | |
2838 | ||
2839 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
2840 | L2CAP_CONF_REQ, len, req); | |
2841 | l2cap_pi(sk)->num_conf_req++; | |
2842 | if (result != L2CAP_CONF_SUCCESS) | |
2843 | goto done; | |
2844 | break; | |
1da177e4 LT |
2845 | } |
2846 | ||
8e87d142 | 2847 | default: |
1da177e4 | 2848 | sk->sk_state = BT_DISCONN; |
b1235d79 | 2849 | sk->sk_err = ECONNRESET; |
1da177e4 | 2850 | l2cap_sock_set_timer(sk, HZ * 5); |
22121fc9 | 2851 | l2cap_send_disconn_req(conn, sk); |
1da177e4 LT |
2852 | goto done; |
2853 | } | |
2854 | ||
2855 | if (flags & 0x01) | |
2856 | goto done; | |
2857 | ||
1da177e4 LT |
2858 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
2859 | ||
2860 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
f64f9e71 JP |
2861 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
2862 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
fcc203c3 GP |
2863 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
2864 | ||
1da177e4 | 2865 | sk->sk_state = BT_CONNECTED; |
0565c1c2 | 2866 | l2cap_pi(sk)->next_tx_seq = 0; |
1c2acffb | 2867 | l2cap_pi(sk)->expected_tx_seq = 0; |
1c2acffb | 2868 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
2869 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
2870 | l2cap_ertm_init(sk); | |
2871 | ||
1da177e4 LT |
2872 | l2cap_chan_ready(sk); |
2873 | } | |
2874 | ||
2875 | done: | |
2876 | bh_unlock_sock(sk); | |
2877 | return 0; | |
2878 | } | |
2879 | ||
2880 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2881 | { | |
2882 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
2883 | struct l2cap_disconn_rsp rsp; | |
2884 | u16 dcid, scid; | |
2885 | struct sock *sk; | |
2886 | ||
2887 | scid = __le16_to_cpu(req->scid); | |
2888 | dcid = __le16_to_cpu(req->dcid); | |
2889 | ||
2890 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
2891 | ||
af05b30b GP |
2892 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
2893 | if (!sk) | |
1da177e4 LT |
2894 | return 0; |
2895 | ||
aca3192c YH |
2896 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
2897 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
2898 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
2899 | ||
2900 | sk->sk_shutdown = SHUTDOWN_MASK; | |
2901 | ||
1c2acffb | 2902 | skb_queue_purge(TX_QUEUE(sk)); |
0565c1c2 GP |
2903 | |
2904 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
2905 | skb_queue_purge(SREJ_QUEUE(sk)); | |
2906 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
2907 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
2908 | } | |
1c2acffb | 2909 | |
1da177e4 LT |
2910 | l2cap_chan_del(sk, ECONNRESET); |
2911 | bh_unlock_sock(sk); | |
2912 | ||
2913 | l2cap_sock_kill(sk); | |
2914 | return 0; | |
2915 | } | |
2916 | ||
2917 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2918 | { | |
2919 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
2920 | u16 dcid, scid; | |
2921 | struct sock *sk; | |
2922 | ||
2923 | scid = __le16_to_cpu(rsp->scid); | |
2924 | dcid = __le16_to_cpu(rsp->dcid); | |
2925 | ||
2926 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
2927 | ||
af05b30b GP |
2928 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2929 | if (!sk) | |
1da177e4 LT |
2930 | return 0; |
2931 | ||
1c2acffb | 2932 | skb_queue_purge(TX_QUEUE(sk)); |
0565c1c2 GP |
2933 | |
2934 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
2935 | skb_queue_purge(SREJ_QUEUE(sk)); | |
2936 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
2937 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
2938 | } | |
1c2acffb | 2939 | |
1da177e4 LT |
2940 | l2cap_chan_del(sk, 0); |
2941 | bh_unlock_sock(sk); | |
2942 | ||
2943 | l2cap_sock_kill(sk); | |
2944 | return 0; | |
2945 | } | |
2946 | ||
2947 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2948 | { | |
2949 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
2950 | u16 type; |
2951 | ||
2952 | type = __le16_to_cpu(req->type); | |
2953 | ||
2954 | BT_DBG("type 0x%4.4x", type); | |
2955 | ||
f0709e03 MH |
2956 | if (type == L2CAP_IT_FEAT_MASK) { |
2957 | u8 buf[8]; | |
44dd46de | 2958 | u32 feat_mask = l2cap_feat_mask; |
f0709e03 MH |
2959 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
2960 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2961 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
44dd46de | 2962 | if (enable_ertm) |
fcc203c3 GP |
2963 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
2964 | | L2CAP_FEAT_FCS; | |
1b7bf4ed | 2965 | put_unaligned_le32(feat_mask, rsp->data); |
f0709e03 MH |
2966 | l2cap_send_cmd(conn, cmd->ident, |
2967 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
e1027a7c MH |
2968 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
2969 | u8 buf[12]; | |
2970 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
2971 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
2972 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
2973 | memcpy(buf + 4, l2cap_fixed_chan, 8); | |
2974 | l2cap_send_cmd(conn, cmd->ident, | |
2975 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
f0709e03 MH |
2976 | } else { |
2977 | struct l2cap_info_rsp rsp; | |
2978 | rsp.type = cpu_to_le16(type); | |
2979 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
2980 | l2cap_send_cmd(conn, cmd->ident, | |
2981 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
2982 | } | |
1da177e4 LT |
2983 | |
2984 | return 0; | |
2985 | } | |
2986 | ||
2987 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2988 | { | |
2989 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
2990 | u16 type, result; | |
2991 | ||
2992 | type = __le16_to_cpu(rsp->type); | |
2993 | result = __le16_to_cpu(rsp->result); | |
2994 | ||
2995 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
2996 | ||
4e8402a3 MH |
2997 | del_timer(&conn->info_timer); |
2998 | ||
984947dc | 2999 | if (type == L2CAP_IT_FEAT_MASK) { |
83985319 | 3000 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 | 3001 | |
47ec1dcd | 3002 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
e1027a7c MH |
3003 | struct l2cap_info_req req; |
3004 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
3005 | ||
3006 | conn->info_ident = l2cap_get_ident(conn); | |
3007 | ||
3008 | l2cap_send_cmd(conn, conn->info_ident, | |
3009 | L2CAP_INFO_REQ, sizeof(req), &req); | |
3010 | } else { | |
3011 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
3012 | conn->info_ident = 0; | |
3013 | ||
3014 | l2cap_conn_start(conn); | |
3015 | } | |
3016 | } else if (type == L2CAP_IT_FIXED_CHAN) { | |
984947dc | 3017 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 3018 | conn->info_ident = 0; |
984947dc MH |
3019 | |
3020 | l2cap_conn_start(conn); | |
3021 | } | |
4e8402a3 | 3022 | |
1da177e4 LT |
3023 | return 0; |
3024 | } | |
3025 | ||
3026 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
3027 | { | |
3028 | u8 *data = skb->data; | |
3029 | int len = skb->len; | |
3030 | struct l2cap_cmd_hdr cmd; | |
3031 | int err = 0; | |
3032 | ||
3033 | l2cap_raw_recv(conn, skb); | |
3034 | ||
3035 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 3036 | u16 cmd_len; |
1da177e4 LT |
3037 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
3038 | data += L2CAP_CMD_HDR_SIZE; | |
3039 | len -= L2CAP_CMD_HDR_SIZE; | |
3040 | ||
88219a0f | 3041 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 3042 | |
88219a0f | 3043 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 3044 | |
88219a0f | 3045 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
3046 | BT_DBG("corrupted command"); |
3047 | break; | |
3048 | } | |
3049 | ||
3050 | switch (cmd.code) { | |
3051 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 3052 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
3053 | break; |
3054 | ||
3055 | case L2CAP_CONN_REQ: | |
3056 | err = l2cap_connect_req(conn, &cmd, data); | |
3057 | break; | |
3058 | ||
3059 | case L2CAP_CONN_RSP: | |
3060 | err = l2cap_connect_rsp(conn, &cmd, data); | |
3061 | break; | |
3062 | ||
3063 | case L2CAP_CONF_REQ: | |
88219a0f | 3064 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
3065 | break; |
3066 | ||
3067 | case L2CAP_CONF_RSP: | |
3068 | err = l2cap_config_rsp(conn, &cmd, data); | |
3069 | break; | |
3070 | ||
3071 | case L2CAP_DISCONN_REQ: | |
3072 | err = l2cap_disconnect_req(conn, &cmd, data); | |
3073 | break; | |
3074 | ||
3075 | case L2CAP_DISCONN_RSP: | |
3076 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
3077 | break; | |
3078 | ||
3079 | case L2CAP_ECHO_REQ: | |
88219a0f | 3080 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
3081 | break; |
3082 | ||
3083 | case L2CAP_ECHO_RSP: | |
3084 | break; | |
3085 | ||
3086 | case L2CAP_INFO_REQ: | |
3087 | err = l2cap_information_req(conn, &cmd, data); | |
3088 | break; | |
3089 | ||
3090 | case L2CAP_INFO_RSP: | |
3091 | err = l2cap_information_rsp(conn, &cmd, data); | |
3092 | break; | |
3093 | ||
3094 | default: | |
3095 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
3096 | err = -EINVAL; | |
3097 | break; | |
3098 | } | |
3099 | ||
3100 | if (err) { | |
3101 | struct l2cap_cmd_rej rej; | |
3102 | BT_DBG("error %d", err); | |
3103 | ||
3104 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 3105 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
3106 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
3107 | } | |
3108 | ||
88219a0f AV |
3109 | data += cmd_len; |
3110 | len -= cmd_len; | |
1da177e4 LT |
3111 | } |
3112 | ||
3113 | kfree_skb(skb); | |
3114 | } | |
3115 | ||
fcc203c3 GP |
3116 | static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb) |
3117 | { | |
3118 | u16 our_fcs, rcv_fcs; | |
3119 | int hdr_size = L2CAP_HDR_SIZE + 2; | |
3120 | ||
3121 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
3122 | skb_trim(skb, skb->len - 2); | |
3123 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); | |
3124 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); | |
3125 | ||
3126 | if (our_fcs != rcv_fcs) | |
3127 | return -EINVAL; | |
3128 | } | |
3129 | return 0; | |
3130 | } | |
3131 | ||
8f17154f GP |
3132 | static void l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar) |
3133 | { | |
3134 | struct sk_buff *next_skb; | |
3135 | ||
3136 | bt_cb(skb)->tx_seq = tx_seq; | |
3137 | bt_cb(skb)->sar = sar; | |
3138 | ||
3139 | next_skb = skb_peek(SREJ_QUEUE(sk)); | |
3140 | if (!next_skb) { | |
3141 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
3142 | return; | |
3143 | } | |
3144 | ||
3145 | do { | |
3146 | if (bt_cb(next_skb)->tx_seq > tx_seq) { | |
3147 | __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb); | |
3148 | return; | |
3149 | } | |
3150 | ||
3151 | if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb)) | |
3152 | break; | |
3153 | ||
3154 | } while((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb))); | |
3155 | ||
3156 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
3157 | } | |
3158 | ||
c74e560c GP |
3159 | static int l2cap_sar_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
3160 | { | |
3161 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3162 | struct sk_buff *_skb; | |
3163 | int err = -EINVAL; | |
3164 | ||
3165 | switch (control & L2CAP_CTRL_SAR) { | |
3166 | case L2CAP_SDU_UNSEGMENTED: | |
3167 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3168 | kfree_skb(pi->sdu); | |
3169 | break; | |
3170 | } | |
3171 | ||
3172 | err = sock_queue_rcv_skb(sk, skb); | |
3173 | if (!err) | |
3174 | return 0; | |
3175 | ||
3176 | break; | |
3177 | ||
3178 | case L2CAP_SDU_START: | |
3179 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3180 | kfree_skb(pi->sdu); | |
3181 | break; | |
3182 | } | |
3183 | ||
3184 | pi->sdu_len = get_unaligned_le16(skb->data); | |
3185 | skb_pull(skb, 2); | |
3186 | ||
3187 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); | |
3188 | if (!pi->sdu) { | |
3189 | err = -ENOMEM; | |
3190 | break; | |
3191 | } | |
3192 | ||
3193 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3194 | ||
3195 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3196 | pi->partial_sdu_len = skb->len; | |
3197 | err = 0; | |
3198 | break; | |
3199 | ||
3200 | case L2CAP_SDU_CONTINUE: | |
3201 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3202 | break; | |
3203 | ||
3204 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3205 | ||
3206 | pi->partial_sdu_len += skb->len; | |
3207 | if (pi->partial_sdu_len > pi->sdu_len) | |
3208 | kfree_skb(pi->sdu); | |
3209 | else | |
3210 | err = 0; | |
3211 | ||
3212 | break; | |
3213 | ||
3214 | case L2CAP_SDU_END: | |
3215 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3216 | break; | |
3217 | ||
3218 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3219 | ||
3220 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
3221 | pi->partial_sdu_len += skb->len; | |
3222 | ||
3223 | if (pi->partial_sdu_len == pi->sdu_len) { | |
3224 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
3225 | err = sock_queue_rcv_skb(sk, _skb); | |
3226 | if (err < 0) | |
3227 | kfree_skb(_skb); | |
3228 | } | |
3229 | kfree_skb(pi->sdu); | |
3230 | err = 0; | |
3231 | ||
3232 | break; | |
3233 | } | |
3234 | ||
3235 | kfree_skb(skb); | |
3236 | return err; | |
3237 | } | |
3238 | ||
8f17154f GP |
3239 | static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq) |
3240 | { | |
3241 | struct sk_buff *skb; | |
3242 | u16 control = 0; | |
3243 | ||
3244 | while((skb = skb_peek(SREJ_QUEUE(sk)))) { | |
3245 | if (bt_cb(skb)->tx_seq != tx_seq) | |
3246 | break; | |
3247 | ||
3248 | skb = skb_dequeue(SREJ_QUEUE(sk)); | |
3249 | control |= bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; | |
3250 | l2cap_sar_reassembly_sdu(sk, skb, control); | |
3251 | l2cap_pi(sk)->buffer_seq_srej = | |
3252 | (l2cap_pi(sk)->buffer_seq_srej + 1) % 64; | |
3253 | tx_seq++; | |
3254 | } | |
3255 | } | |
3256 | ||
3257 | static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq) | |
3258 | { | |
3259 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3260 | struct srej_list *l, *tmp; | |
3261 | u16 control; | |
3262 | ||
3263 | list_for_each_entry_safe(l,tmp, SREJ_LIST(sk), list) { | |
3264 | if (l->tx_seq == tx_seq) { | |
3265 | list_del(&l->list); | |
3266 | kfree(l); | |
3267 | return; | |
3268 | } | |
3269 | control = L2CAP_SUPER_SELECT_REJECT; | |
3270 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3271 | l2cap_send_sframe(pi, control); | |
3272 | list_del(&l->list); | |
3273 | list_add_tail(&l->list, SREJ_LIST(sk)); | |
3274 | } | |
3275 | } | |
3276 | ||
3277 | static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) | |
3278 | { | |
3279 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3280 | struct srej_list *new; | |
3281 | u16 control; | |
3282 | ||
3283 | while (tx_seq != pi->expected_tx_seq) { | |
3284 | control = L2CAP_SUPER_SELECT_REJECT; | |
3285 | control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
ef54fd93 GP |
3286 | if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { |
3287 | control |= L2CAP_CTRL_POLL; | |
3288 | pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; | |
3289 | } | |
8f17154f GP |
3290 | l2cap_send_sframe(pi, control); |
3291 | ||
3292 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); | |
3293 | new->tx_seq = pi->expected_tx_seq++; | |
3294 | list_add_tail(&new->list, SREJ_LIST(sk)); | |
3295 | } | |
3296 | pi->expected_tx_seq++; | |
3297 | } | |
3298 | ||
1c2acffb GP |
3299 | static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
3300 | { | |
3301 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3302 | u8 tx_seq = __get_txseq(rx_control); | |
9f121a5a | 3303 | u8 req_seq = __get_reqseq(rx_control); |
1c2acffb | 3304 | u16 tx_control = 0; |
8f17154f | 3305 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
1c2acffb GP |
3306 | int err = 0; |
3307 | ||
3308 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
3309 | ||
9f121a5a GP |
3310 | pi->expected_ack_seq = req_seq; |
3311 | l2cap_drop_acked_frames(sk); | |
3312 | ||
8f17154f GP |
3313 | if (tx_seq == pi->expected_tx_seq) |
3314 | goto expected; | |
1c2acffb | 3315 | |
8f17154f GP |
3316 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
3317 | struct srej_list *first; | |
30afb5b2 | 3318 | |
8f17154f GP |
3319 | first = list_first_entry(SREJ_LIST(sk), |
3320 | struct srej_list, list); | |
3321 | if (tx_seq == first->tx_seq) { | |
3322 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3323 | l2cap_check_srej_gap(sk, tx_seq); | |
3324 | ||
3325 | list_del(&first->list); | |
3326 | kfree(first); | |
3327 | ||
3328 | if (list_empty(SREJ_LIST(sk))) { | |
3329 | pi->buffer_seq = pi->buffer_seq_srej; | |
3330 | pi->conn_state &= ~L2CAP_CONN_SREJ_SENT; | |
3331 | } | |
3332 | } else { | |
3333 | struct srej_list *l; | |
3334 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3335 | ||
3336 | list_for_each_entry(l, SREJ_LIST(sk), list) { | |
3337 | if (l->tx_seq == tx_seq) { | |
3338 | l2cap_resend_srejframe(sk, tx_seq); | |
3339 | return 0; | |
3340 | } | |
3341 | } | |
3342 | l2cap_send_srejframe(sk, tx_seq); | |
30afb5b2 GP |
3343 | } |
3344 | } else { | |
8f17154f | 3345 | pi->conn_state |= L2CAP_CONN_SREJ_SENT; |
1c2acffb | 3346 | |
8f17154f GP |
3347 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
3348 | pi->buffer_seq_srej = pi->buffer_seq; | |
3349 | ||
3350 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
3351 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3352 | ||
ef54fd93 GP |
3353 | pi->conn_state |= L2CAP_CONN_SEND_PBIT; |
3354 | ||
8f17154f | 3355 | l2cap_send_srejframe(sk, tx_seq); |
1c2acffb | 3356 | } |
30afb5b2 GP |
3357 | return 0; |
3358 | ||
8f17154f GP |
3359 | expected: |
3360 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
3361 | ||
3362 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { | |
3363 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3364 | return 0; | |
3365 | } | |
3366 | ||
4ec10d97 GP |
3367 | if (rx_control & L2CAP_CTRL_FINAL) { |
3368 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
3369 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
3370 | else { | |
3371 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
3372 | pi->next_tx_seq = pi->expected_ack_seq; | |
3373 | l2cap_ertm_send(sk); | |
3374 | } | |
3375 | } | |
3376 | ||
8f17154f GP |
3377 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; |
3378 | ||
3379 | err = l2cap_sar_reassembly_sdu(sk, skb, rx_control); | |
3380 | if (err < 0) | |
3381 | return err; | |
3382 | ||
3383 | pi->num_to_ack = (pi->num_to_ack + 1) % L2CAP_DEFAULT_NUM_TO_ACK; | |
3384 | if (pi->num_to_ack == L2CAP_DEFAULT_NUM_TO_ACK - 1) { | |
3385 | tx_control |= L2CAP_SUPER_RCV_READY; | |
3386 | tx_control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3387 | l2cap_send_sframe(pi, tx_control); | |
3388 | } | |
3389 | return 0; | |
1c2acffb GP |
3390 | } |
3391 | ||
3392 | static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) | |
3393 | { | |
3394 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
8f17154f | 3395 | u8 tx_seq = __get_reqseq(rx_control); |
1c2acffb GP |
3396 | |
3397 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
3398 | ||
3399 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { | |
3400 | case L2CAP_SUPER_RCV_READY: | |
e90bac06 GP |
3401 | if (rx_control & L2CAP_CTRL_POLL) { |
3402 | u16 control = L2CAP_CTRL_FINAL; | |
ca42a613 GP |
3403 | control |= L2CAP_SUPER_RCV_READY | |
3404 | (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT); | |
e90bac06 | 3405 | l2cap_send_sframe(l2cap_pi(sk), control); |
2246b2f1 GP |
3406 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
3407 | ||
e90bac06 | 3408 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
2246b2f1 | 3409 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
ca42a613 GP |
3410 | pi->expected_ack_seq = tx_seq; |
3411 | l2cap_drop_acked_frames(sk); | |
3412 | ||
4ec10d97 GP |
3413 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
3414 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
3415 | else { | |
3416 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
3417 | pi->next_tx_seq = pi->expected_ack_seq; | |
3418 | l2cap_ertm_send(sk); | |
3419 | } | |
3420 | ||
e90bac06 GP |
3421 | if (!(pi->conn_state & L2CAP_CONN_WAIT_F)) |
3422 | break; | |
3423 | ||
3424 | pi->conn_state &= ~L2CAP_CONN_WAIT_F; | |
3425 | del_timer(&pi->monitor_timer); | |
3426 | ||
3427 | if (pi->unacked_frames > 0) | |
3428 | __mod_retrans_timer(); | |
3429 | } else { | |
8f17154f | 3430 | pi->expected_ack_seq = tx_seq; |
e90bac06 | 3431 | l2cap_drop_acked_frames(sk); |
2246b2f1 | 3432 | |
f64f9e71 JP |
3433 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
3434 | (pi->unacked_frames > 0)) | |
e90bac06 | 3435 | __mod_retrans_timer(); |
2246b2f1 | 3436 | |
e90bac06 | 3437 | l2cap_ertm_send(sk); |
2246b2f1 | 3438 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
e90bac06 | 3439 | } |
1c2acffb GP |
3440 | break; |
3441 | ||
1c2acffb | 3442 | case L2CAP_SUPER_REJECT: |
2246b2f1 GP |
3443 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
3444 | ||
30afb5b2 GP |
3445 | pi->expected_ack_seq = __get_reqseq(rx_control); |
3446 | l2cap_drop_acked_frames(sk); | |
3447 | ||
4ec10d97 GP |
3448 | if (rx_control & L2CAP_CTRL_FINAL) { |
3449 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
3450 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
3451 | else { | |
3452 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
3453 | pi->next_tx_seq = pi->expected_ack_seq; | |
3454 | l2cap_ertm_send(sk); | |
3455 | } | |
3456 | } else { | |
3457 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
3458 | pi->next_tx_seq = pi->expected_ack_seq; | |
3459 | l2cap_ertm_send(sk); | |
30afb5b2 | 3460 | |
4ec10d97 GP |
3461 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
3462 | pi->srej_save_reqseq = tx_seq; | |
3463 | pi->conn_state |= L2CAP_CONN_REJ_ACT; | |
3464 | } | |
3465 | } | |
30afb5b2 GP |
3466 | |
3467 | break; | |
3468 | ||
1c2acffb | 3469 | case L2CAP_SUPER_SELECT_REJECT: |
2246b2f1 GP |
3470 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
3471 | ||
ef54fd93 GP |
3472 | if (rx_control & L2CAP_CTRL_POLL) { |
3473 | l2cap_retransmit_frame(sk, tx_seq); | |
3474 | pi->expected_ack_seq = tx_seq; | |
3475 | l2cap_drop_acked_frames(sk); | |
3476 | l2cap_ertm_send(sk); | |
3477 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { | |
3478 | pi->srej_save_reqseq = tx_seq; | |
3479 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
3480 | } | |
3481 | } else if (rx_control & L2CAP_CTRL_FINAL) { | |
3482 | if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && | |
3483 | pi->srej_save_reqseq == tx_seq) | |
889a3ca4 | 3484 | pi->conn_state &= ~L2CAP_CONN_SREJ_ACT; |
ef54fd93 GP |
3485 | else |
3486 | l2cap_retransmit_frame(sk, tx_seq); | |
3487 | } | |
3488 | else { | |
3489 | l2cap_retransmit_frame(sk, tx_seq); | |
3490 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { | |
3491 | pi->srej_save_reqseq = tx_seq; | |
3492 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
3493 | } | |
3494 | } | |
8f17154f GP |
3495 | break; |
3496 | ||
3497 | case L2CAP_SUPER_RCV_NOT_READY: | |
2246b2f1 GP |
3498 | pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; |
3499 | pi->expected_ack_seq = tx_seq; | |
3500 | l2cap_drop_acked_frames(sk); | |
3501 | ||
3502 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
3503 | if (rx_control & L2CAP_CTRL_POLL) { | |
7e743090 GP |
3504 | u16 control = L2CAP_CTRL_FINAL; |
3505 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); | |
2246b2f1 | 3506 | } |
1c2acffb GP |
3507 | break; |
3508 | } | |
3509 | ||
3510 | return 0; | |
3511 | } | |
3512 | ||
1da177e4 LT |
3513 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
3514 | { | |
3515 | struct sock *sk; | |
6840ed07 | 3516 | struct l2cap_pinfo *pi; |
c74e560c | 3517 | u16 control, len; |
6840ed07 | 3518 | u8 tx_seq; |
1c2acffb | 3519 | int err; |
1da177e4 LT |
3520 | |
3521 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
3522 | if (!sk) { | |
3523 | BT_DBG("unknown cid 0x%4.4x", cid); | |
3524 | goto drop; | |
3525 | } | |
3526 | ||
6840ed07 GP |
3527 | pi = l2cap_pi(sk); |
3528 | ||
1da177e4 LT |
3529 | BT_DBG("sk %p, len %d", sk, skb->len); |
3530 | ||
3531 | if (sk->sk_state != BT_CONNECTED) | |
3532 | goto drop; | |
3533 | ||
6840ed07 | 3534 | switch (pi->mode) { |
1c2acffb GP |
3535 | case L2CAP_MODE_BASIC: |
3536 | /* If socket recv buffers overflows we drop data here | |
3537 | * which is *bad* because L2CAP has to be reliable. | |
3538 | * But we don't have any other choice. L2CAP doesn't | |
3539 | * provide flow control mechanism. */ | |
1da177e4 | 3540 | |
6840ed07 | 3541 | if (pi->imtu < skb->len) |
1c2acffb | 3542 | goto drop; |
1da177e4 | 3543 | |
1c2acffb GP |
3544 | if (!sock_queue_rcv_skb(sk, skb)) |
3545 | goto done; | |
3546 | break; | |
3547 | ||
3548 | case L2CAP_MODE_ERTM: | |
3549 | control = get_unaligned_le16(skb->data); | |
3550 | skb_pull(skb, 2); | |
c74e560c | 3551 | len = skb->len; |
1c2acffb | 3552 | |
c74e560c GP |
3553 | if (__is_sar_start(control)) |
3554 | len -= 2; | |
3555 | ||
fcc203c3 GP |
3556 | if (pi->fcs == L2CAP_FCS_CRC16) |
3557 | len -= 2; | |
3558 | ||
30afb5b2 GP |
3559 | /* |
3560 | * We can just drop the corrupted I-frame here. | |
3561 | * Receiver will miss it and start proper recovery | |
3562 | * procedures and ask retransmission. | |
3563 | */ | |
c74e560c | 3564 | if (len > L2CAP_DEFAULT_MAX_PDU_SIZE) |
1c2acffb GP |
3565 | goto drop; |
3566 | ||
fcc203c3 GP |
3567 | if (l2cap_check_fcs(pi, skb)) |
3568 | goto drop; | |
3569 | ||
1c2acffb GP |
3570 | if (__is_iframe(control)) |
3571 | err = l2cap_data_channel_iframe(sk, control, skb); | |
3572 | else | |
3573 | err = l2cap_data_channel_sframe(sk, control, skb); | |
3574 | ||
3575 | if (!err) | |
3576 | goto done; | |
3577 | break; | |
3578 | ||
6840ed07 GP |
3579 | case L2CAP_MODE_STREAMING: |
3580 | control = get_unaligned_le16(skb->data); | |
3581 | skb_pull(skb, 2); | |
3582 | len = skb->len; | |
3583 | ||
3584 | if (__is_sar_start(control)) | |
3585 | len -= 2; | |
3586 | ||
fcc203c3 GP |
3587 | if (pi->fcs == L2CAP_FCS_CRC16) |
3588 | len -= 2; | |
3589 | ||
6840ed07 GP |
3590 | if (len > L2CAP_DEFAULT_MAX_PDU_SIZE || __is_sframe(control)) |
3591 | goto drop; | |
3592 | ||
fcc203c3 GP |
3593 | if (l2cap_check_fcs(pi, skb)) |
3594 | goto drop; | |
3595 | ||
6840ed07 GP |
3596 | tx_seq = __get_txseq(control); |
3597 | ||
3598 | if (pi->expected_tx_seq == tx_seq) | |
3599 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
3600 | else | |
3601 | pi->expected_tx_seq = tx_seq + 1; | |
3602 | ||
3603 | err = l2cap_sar_reassembly_sdu(sk, skb, control); | |
3604 | ||
3605 | goto done; | |
3606 | ||
1c2acffb GP |
3607 | default: |
3608 | BT_DBG("sk %p: bad mode 0x%2.2x", sk, l2cap_pi(sk)->mode); | |
3609 | break; | |
3610 | } | |
1da177e4 LT |
3611 | |
3612 | drop: | |
3613 | kfree_skb(skb); | |
3614 | ||
3615 | done: | |
0139418c MH |
3616 | if (sk) |
3617 | bh_unlock_sock(sk); | |
3618 | ||
1da177e4 LT |
3619 | return 0; |
3620 | } | |
3621 | ||
8e036fc3 | 3622 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
3623 | { |
3624 | struct sock *sk; | |
3625 | ||
3626 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
3627 | if (!sk) | |
3628 | goto drop; | |
3629 | ||
3630 | BT_DBG("sk %p, len %d", sk, skb->len); | |
3631 | ||
3632 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
3633 | goto drop; | |
3634 | ||
3635 | if (l2cap_pi(sk)->imtu < skb->len) | |
3636 | goto drop; | |
3637 | ||
3638 | if (!sock_queue_rcv_skb(sk, skb)) | |
3639 | goto done; | |
3640 | ||
3641 | drop: | |
3642 | kfree_skb(skb); | |
3643 | ||
3644 | done: | |
af05b30b GP |
3645 | if (sk) |
3646 | bh_unlock_sock(sk); | |
1da177e4 LT |
3647 | return 0; |
3648 | } | |
3649 | ||
3650 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
3651 | { | |
3652 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
3653 | u16 cid, len; |
3654 | __le16 psm; | |
1da177e4 LT |
3655 | |
3656 | skb_pull(skb, L2CAP_HDR_SIZE); | |
3657 | cid = __le16_to_cpu(lh->cid); | |
3658 | len = __le16_to_cpu(lh->len); | |
3659 | ||
1c2acffb GP |
3660 | if (len != skb->len) { |
3661 | kfree_skb(skb); | |
3662 | return; | |
3663 | } | |
3664 | ||
1da177e4 LT |
3665 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
3666 | ||
3667 | switch (cid) { | |
8db4dc46 | 3668 | case L2CAP_CID_SIGNALING: |
1da177e4 LT |
3669 | l2cap_sig_channel(conn, skb); |
3670 | break; | |
3671 | ||
8db4dc46 | 3672 | case L2CAP_CID_CONN_LESS: |
1b7bf4ed | 3673 | psm = get_unaligned_le16(skb->data); |
1da177e4 LT |
3674 | skb_pull(skb, 2); |
3675 | l2cap_conless_channel(conn, psm, skb); | |
3676 | break; | |
3677 | ||
3678 | default: | |
3679 | l2cap_data_channel(conn, cid, skb); | |
3680 | break; | |
3681 | } | |
3682 | } | |
3683 | ||
3684 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
3685 | ||
3686 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
3687 | { | |
3688 | int exact = 0, lm1 = 0, lm2 = 0; | |
3689 | register struct sock *sk; | |
3690 | struct hlist_node *node; | |
3691 | ||
3692 | if (type != ACL_LINK) | |
3693 | return 0; | |
3694 | ||
3695 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
3696 | ||
3697 | /* Find listening sockets and check their link_mode */ | |
3698 | read_lock(&l2cap_sk_list.lock); | |
3699 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
3700 | if (sk->sk_state != BT_LISTEN) | |
3701 | continue; | |
3702 | ||
3703 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
3704 | lm1 |= HCI_LM_ACCEPT; |
3705 | if (l2cap_pi(sk)->role_switch) | |
3706 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 3707 | exact++; |
2af6b9d5 MH |
3708 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
3709 | lm2 |= HCI_LM_ACCEPT; | |
3710 | if (l2cap_pi(sk)->role_switch) | |
3711 | lm2 |= HCI_LM_MASTER; | |
3712 | } | |
1da177e4 LT |
3713 | } |
3714 | read_unlock(&l2cap_sk_list.lock); | |
3715 | ||
3716 | return exact ? lm1 : lm2; | |
3717 | } | |
3718 | ||
3719 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
3720 | { | |
0139418c MH |
3721 | struct l2cap_conn *conn; |
3722 | ||
1da177e4 LT |
3723 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
3724 | ||
3725 | if (hcon->type != ACL_LINK) | |
3726 | return 0; | |
3727 | ||
3728 | if (!status) { | |
1da177e4 LT |
3729 | conn = l2cap_conn_add(hcon, status); |
3730 | if (conn) | |
3731 | l2cap_conn_ready(conn); | |
0139418c | 3732 | } else |
1da177e4 LT |
3733 | l2cap_conn_del(hcon, bt_err(status)); |
3734 | ||
3735 | return 0; | |
3736 | } | |
3737 | ||
2950f21a MH |
3738 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
3739 | { | |
3740 | struct l2cap_conn *conn = hcon->l2cap_data; | |
3741 | ||
3742 | BT_DBG("hcon %p", hcon); | |
3743 | ||
3744 | if (hcon->type != ACL_LINK || !conn) | |
3745 | return 0x13; | |
3746 | ||
3747 | return conn->disc_reason; | |
3748 | } | |
3749 | ||
3750 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) | |
1da177e4 LT |
3751 | { |
3752 | BT_DBG("hcon %p reason %d", hcon, reason); | |
3753 | ||
3754 | if (hcon->type != ACL_LINK) | |
3755 | return 0; | |
3756 | ||
3757 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 3758 | |
1da177e4 LT |
3759 | return 0; |
3760 | } | |
3761 | ||
f62e4323 MH |
3762 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
3763 | { | |
255c7601 MH |
3764 | if (sk->sk_type != SOCK_SEQPACKET) |
3765 | return; | |
3766 | ||
f62e4323 MH |
3767 | if (encrypt == 0x00) { |
3768 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { | |
3769 | l2cap_sock_clear_timer(sk); | |
3770 | l2cap_sock_set_timer(sk, HZ * 5); | |
3771 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
3772 | __l2cap_sock_close(sk, ECONNREFUSED); | |
3773 | } else { | |
3774 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) | |
3775 | l2cap_sock_clear_timer(sk); | |
3776 | } | |
3777 | } | |
3778 | ||
8c1b2355 | 3779 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
3780 | { |
3781 | struct l2cap_chan_list *l; | |
0139418c | 3782 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 3783 | struct sock *sk; |
1da177e4 | 3784 | |
0139418c | 3785 | if (!conn) |
1da177e4 | 3786 | return 0; |
0139418c | 3787 | |
1da177e4 LT |
3788 | l = &conn->chan_list; |
3789 | ||
3790 | BT_DBG("conn %p", conn); | |
3791 | ||
3792 | read_lock(&l->lock); | |
3793 | ||
3794 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
3795 | bh_lock_sock(sk); | |
3796 | ||
6a8d3010 MH |
3797 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
3798 | bh_unlock_sock(sk); | |
3799 | continue; | |
3800 | } | |
3801 | ||
f62e4323 | 3802 | if (!status && (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 3803 | sk->sk_state == BT_CONFIG)) { |
f62e4323 | 3804 | l2cap_check_encryption(sk, encrypt); |
9719f8af MH |
3805 | bh_unlock_sock(sk); |
3806 | continue; | |
3807 | } | |
3808 | ||
b1235d79 MH |
3809 | if (sk->sk_state == BT_CONNECT) { |
3810 | if (!status) { | |
3811 | struct l2cap_conn_req req; | |
3812 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
3813 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 3814 | |
b1235d79 | 3815 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
1da177e4 | 3816 | |
b1235d79 MH |
3817 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
3818 | L2CAP_CONN_REQ, sizeof(req), &req); | |
3819 | } else { | |
3820 | l2cap_sock_clear_timer(sk); | |
3821 | l2cap_sock_set_timer(sk, HZ / 10); | |
3822 | } | |
3823 | } else if (sk->sk_state == BT_CONNECT2) { | |
3824 | struct l2cap_conn_rsp rsp; | |
3825 | __u16 result; | |
1da177e4 | 3826 | |
b1235d79 MH |
3827 | if (!status) { |
3828 | sk->sk_state = BT_CONFIG; | |
3829 | result = L2CAP_CR_SUCCESS; | |
3830 | } else { | |
3831 | sk->sk_state = BT_DISCONN; | |
3832 | l2cap_sock_set_timer(sk, HZ / 10); | |
3833 | result = L2CAP_CR_SEC_BLOCK; | |
3834 | } | |
3835 | ||
3836 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
3837 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
3838 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 3839 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
3840 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
3841 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
3842 | } | |
1da177e4 LT |
3843 | |
3844 | bh_unlock_sock(sk); | |
3845 | } | |
3846 | ||
3847 | read_unlock(&l->lock); | |
b1235d79 | 3848 | |
1da177e4 LT |
3849 | return 0; |
3850 | } | |
3851 | ||
3852 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
3853 | { | |
3854 | struct l2cap_conn *conn = hcon->l2cap_data; | |
3855 | ||
3856 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
3857 | goto drop; | |
3858 | ||
3859 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
3860 | ||
3861 | if (flags & ACL_START) { | |
3862 | struct l2cap_hdr *hdr; | |
3863 | int len; | |
3864 | ||
3865 | if (conn->rx_len) { | |
3866 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
3867 | kfree_skb(conn->rx_skb); | |
3868 | conn->rx_skb = NULL; | |
3869 | conn->rx_len = 0; | |
3870 | l2cap_conn_unreliable(conn, ECOMM); | |
3871 | } | |
3872 | ||
3873 | if (skb->len < 2) { | |
3874 | BT_ERR("Frame is too short (len %d)", skb->len); | |
3875 | l2cap_conn_unreliable(conn, ECOMM); | |
3876 | goto drop; | |
3877 | } | |
3878 | ||
3879 | hdr = (struct l2cap_hdr *) skb->data; | |
3880 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
3881 | ||
3882 | if (len == skb->len) { | |
3883 | /* Complete frame received */ | |
3884 | l2cap_recv_frame(conn, skb); | |
3885 | return 0; | |
3886 | } | |
3887 | ||
3888 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
3889 | ||
3890 | if (skb->len > len) { | |
3891 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
3892 | skb->len, len); | |
3893 | l2cap_conn_unreliable(conn, ECOMM); | |
3894 | goto drop; | |
3895 | } | |
3896 | ||
3897 | /* Allocate skb for the complete frame (with header) */ | |
af05b30b GP |
3898 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
3899 | if (!conn->rx_skb) | |
1da177e4 LT |
3900 | goto drop; |
3901 | ||
d626f62b | 3902 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 3903 | skb->len); |
1da177e4 LT |
3904 | conn->rx_len = len - skb->len; |
3905 | } else { | |
3906 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
3907 | ||
3908 | if (!conn->rx_len) { | |
3909 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
3910 | l2cap_conn_unreliable(conn, ECOMM); | |
3911 | goto drop; | |
3912 | } | |
3913 | ||
3914 | if (skb->len > conn->rx_len) { | |
3915 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
3916 | skb->len, conn->rx_len); | |
3917 | kfree_skb(conn->rx_skb); | |
3918 | conn->rx_skb = NULL; | |
3919 | conn->rx_len = 0; | |
3920 | l2cap_conn_unreliable(conn, ECOMM); | |
3921 | goto drop; | |
3922 | } | |
3923 | ||
d626f62b | 3924 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 3925 | skb->len); |
1da177e4 LT |
3926 | conn->rx_len -= skb->len; |
3927 | ||
3928 | if (!conn->rx_len) { | |
3929 | /* Complete frame received */ | |
3930 | l2cap_recv_frame(conn, conn->rx_skb); | |
3931 | conn->rx_skb = NULL; | |
3932 | } | |
3933 | } | |
3934 | ||
3935 | drop: | |
3936 | kfree_skb(skb); | |
3937 | return 0; | |
3938 | } | |
3939 | ||
be9d1227 | 3940 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
3941 | { |
3942 | struct sock *sk; | |
3943 | struct hlist_node *node; | |
be9d1227 | 3944 | char *str = buf; |
1da177e4 LT |
3945 | |
3946 | read_lock_bh(&l2cap_sk_list.lock); | |
3947 | ||
be9d1227 MH |
3948 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
3949 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1da177e4 | 3950 | |
2af6b9d5 | 3951 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
be9d1227 | 3952 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), |
b4324b5d MH |
3953 | sk->sk_state, __le16_to_cpu(pi->psm), pi->scid, |
3954 | pi->dcid, pi->imtu, pi->omtu, pi->sec_level); | |
be9d1227 | 3955 | } |
1da177e4 | 3956 | |
1da177e4 | 3957 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 3958 | |
af05b30b | 3959 | return str - buf; |
1da177e4 LT |
3960 | } |
3961 | ||
be9d1227 | 3962 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
1da177e4 | 3963 | |
90ddc4f0 | 3964 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
3965 | .family = PF_BLUETOOTH, |
3966 | .owner = THIS_MODULE, | |
3967 | .release = l2cap_sock_release, | |
3968 | .bind = l2cap_sock_bind, | |
3969 | .connect = l2cap_sock_connect, | |
3970 | .listen = l2cap_sock_listen, | |
3971 | .accept = l2cap_sock_accept, | |
3972 | .getname = l2cap_sock_getname, | |
3973 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 3974 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 3975 | .poll = bt_sock_poll, |
3241ad82 | 3976 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
3977 | .mmap = sock_no_mmap, |
3978 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
3979 | .shutdown = l2cap_sock_shutdown, |
3980 | .setsockopt = l2cap_sock_setsockopt, | |
3981 | .getsockopt = l2cap_sock_getsockopt | |
3982 | }; | |
3983 | ||
ec1b4cf7 | 3984 | static const struct net_proto_family l2cap_sock_family_ops = { |
1da177e4 LT |
3985 | .family = PF_BLUETOOTH, |
3986 | .owner = THIS_MODULE, | |
3987 | .create = l2cap_sock_create, | |
3988 | }; | |
3989 | ||
3990 | static struct hci_proto l2cap_hci_proto = { | |
3991 | .name = "L2CAP", | |
3992 | .id = HCI_PROTO_L2CAP, | |
3993 | .connect_ind = l2cap_connect_ind, | |
3994 | .connect_cfm = l2cap_connect_cfm, | |
3995 | .disconn_ind = l2cap_disconn_ind, | |
2950f21a | 3996 | .disconn_cfm = l2cap_disconn_cfm, |
8c1b2355 | 3997 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
3998 | .recv_acldata = l2cap_recv_acldata |
3999 | }; | |
4000 | ||
4001 | static int __init l2cap_init(void) | |
4002 | { | |
4003 | int err; | |
be9d1227 | 4004 | |
1da177e4 LT |
4005 | err = proto_register(&l2cap_proto, 0); |
4006 | if (err < 0) | |
4007 | return err; | |
4008 | ||
4009 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
4010 | if (err < 0) { | |
4011 | BT_ERR("L2CAP socket registration failed"); | |
4012 | goto error; | |
4013 | } | |
4014 | ||
4015 | err = hci_register_proto(&l2cap_hci_proto); | |
4016 | if (err < 0) { | |
4017 | BT_ERR("L2CAP protocol registration failed"); | |
4018 | bt_sock_unregister(BTPROTO_L2CAP); | |
4019 | goto error; | |
4020 | } | |
4021 | ||
df5c37ea MH |
4022 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
4023 | BT_ERR("Failed to create L2CAP info file"); | |
1da177e4 LT |
4024 | |
4025 | BT_INFO("L2CAP ver %s", VERSION); | |
4026 | BT_INFO("L2CAP socket layer initialized"); | |
4027 | ||
4028 | return 0; | |
4029 | ||
4030 | error: | |
4031 | proto_unregister(&l2cap_proto); | |
4032 | return err; | |
4033 | } | |
4034 | ||
4035 | static void __exit l2cap_exit(void) | |
4036 | { | |
a91f2e39 | 4037 | class_remove_file(bt_class, &class_attr_l2cap); |
1da177e4 LT |
4038 | |
4039 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
4040 | BT_ERR("L2CAP socket unregistration failed"); | |
4041 | ||
4042 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
4043 | BT_ERR("L2CAP protocol unregistration failed"); | |
4044 | ||
4045 | proto_unregister(&l2cap_proto); | |
4046 | } | |
4047 | ||
4048 | void l2cap_load(void) | |
4049 | { | |
4050 | /* Dummy function to trigger automatic L2CAP module loading by | |
4051 | * other modules that use L2CAP sockets but don't use any other | |
4052 | * symbols from it. */ | |
4053 | return; | |
4054 | } | |
4055 | EXPORT_SYMBOL(l2cap_load); | |
4056 | ||
4057 | module_init(l2cap_init); | |
4058 | module_exit(l2cap_exit); | |
4059 | ||
44dd46de MH |
4060 | module_param(enable_ertm, bool, 0644); |
4061 | MODULE_PARM_DESC(enable_ertm, "Enable enhanced retransmission mode"); | |
4062 | ||
63fbd24e | 4063 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
4064 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
4065 | MODULE_VERSION(VERSION); | |
4066 | MODULE_LICENSE("GPL"); | |
4067 | MODULE_ALIAS("bt-proto-0"); |