Commit | Line | Data |
---|---|---|
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; | |
5fbcd3d1 | 57 | static int max_transmit = L2CAP_DEFAULT_MAX_TX; |
f0709e03 | 58 | |
47ec1dcd | 59 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
e1027a7c | 60 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
1da177e4 | 61 | |
90ddc4f0 | 62 | static const struct proto_ops l2cap_sock_ops; |
1da177e4 LT |
63 | |
64 | static struct bt_sock_list l2cap_sk_list = { | |
d5fb2962 | 65 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
1da177e4 LT |
66 | }; |
67 | ||
1da177e4 LT |
68 | static void __l2cap_sock_close(struct sock *sk, int reason); |
69 | static void l2cap_sock_close(struct sock *sk); | |
70 | static void l2cap_sock_kill(struct sock *sk); | |
71 | ||
72 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
73 | u8 code, u8 ident, u16 dlen, void *data); | |
74 | ||
75 | /* ---- L2CAP timers ---- */ | |
76 | static void l2cap_sock_timeout(unsigned long arg) | |
77 | { | |
78 | struct sock *sk = (struct sock *) arg; | |
b1235d79 | 79 | int reason; |
1da177e4 LT |
80 | |
81 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
82 | ||
83 | bh_lock_sock(sk); | |
b1235d79 | 84 | |
f62e4323 MH |
85 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
86 | reason = ECONNREFUSED; | |
87 | else if (sk->sk_state == BT_CONNECT && | |
2af6b9d5 | 88 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
b1235d79 MH |
89 | reason = ECONNREFUSED; |
90 | else | |
91 | reason = ETIMEDOUT; | |
92 | ||
93 | __l2cap_sock_close(sk, reason); | |
94 | ||
1da177e4 LT |
95 | bh_unlock_sock(sk); |
96 | ||
97 | l2cap_sock_kill(sk); | |
98 | sock_put(sk); | |
99 | } | |
100 | ||
101 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) | |
102 | { | |
103 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
104 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
105 | } | |
106 | ||
107 | static void l2cap_sock_clear_timer(struct sock *sk) | |
108 | { | |
109 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
110 | sk_stop_timer(sk, &sk->sk_timer); | |
111 | } | |
112 | ||
0139418c MH |
113 | /* ---- L2CAP channels ---- */ |
114 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) | |
115 | { | |
116 | struct sock *s; | |
117 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
118 | if (l2cap_pi(s)->dcid == cid) | |
119 | break; | |
120 | } | |
121 | return s; | |
122 | } | |
123 | ||
124 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
125 | { | |
126 | struct sock *s; | |
127 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
128 | if (l2cap_pi(s)->scid == cid) | |
129 | break; | |
130 | } | |
131 | return s; | |
132 | } | |
133 | ||
134 | /* Find channel with given SCID. | |
135 | * Returns locked socket */ | |
136 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) | |
137 | { | |
138 | struct sock *s; | |
139 | read_lock(&l->lock); | |
140 | s = __l2cap_get_chan_by_scid(l, cid); | |
af05b30b GP |
141 | if (s) |
142 | bh_lock_sock(s); | |
0139418c MH |
143 | read_unlock(&l->lock); |
144 | return s; | |
145 | } | |
146 | ||
147 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
148 | { | |
149 | struct sock *s; | |
150 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { | |
151 | if (l2cap_pi(s)->ident == ident) | |
152 | break; | |
153 | } | |
154 | return s; | |
155 | } | |
156 | ||
157 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) | |
158 | { | |
159 | struct sock *s; | |
160 | read_lock(&l->lock); | |
161 | s = __l2cap_get_chan_by_ident(l, ident); | |
af05b30b GP |
162 | if (s) |
163 | bh_lock_sock(s); | |
0139418c MH |
164 | read_unlock(&l->lock); |
165 | return s; | |
166 | } | |
167 | ||
168 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) | |
169 | { | |
8db4dc46 | 170 | u16 cid = L2CAP_CID_DYN_START; |
0139418c | 171 | |
8db4dc46 | 172 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
af05b30b | 173 | if (!__l2cap_get_chan_by_scid(l, cid)) |
0139418c MH |
174 | return cid; |
175 | } | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
180 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) | |
181 | { | |
182 | sock_hold(sk); | |
183 | ||
184 | if (l->head) | |
185 | l2cap_pi(l->head)->prev_c = sk; | |
186 | ||
187 | l2cap_pi(sk)->next_c = l->head; | |
188 | l2cap_pi(sk)->prev_c = NULL; | |
189 | l->head = sk; | |
190 | } | |
191 | ||
192 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) | |
193 | { | |
194 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; | |
195 | ||
fd1278d7 | 196 | write_lock_bh(&l->lock); |
0139418c MH |
197 | if (sk == l->head) |
198 | l->head = next; | |
199 | ||
200 | if (next) | |
201 | l2cap_pi(next)->prev_c = prev; | |
202 | if (prev) | |
203 | l2cap_pi(prev)->next_c = next; | |
fd1278d7 | 204 | write_unlock_bh(&l->lock); |
0139418c MH |
205 | |
206 | __sock_put(sk); | |
207 | } | |
208 | ||
209 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
210 | { | |
211 | struct l2cap_chan_list *l = &conn->chan_list; | |
212 | ||
af05b30b GP |
213 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
214 | l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); | |
0139418c | 215 | |
2950f21a MH |
216 | conn->disc_reason = 0x13; |
217 | ||
0139418c MH |
218 | l2cap_pi(sk)->conn = conn; |
219 | ||
220 | if (sk->sk_type == SOCK_SEQPACKET) { | |
221 | /* Alloc CID for connection-oriented socket */ | |
222 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); | |
223 | } else if (sk->sk_type == SOCK_DGRAM) { | |
224 | /* Connectionless socket */ | |
8db4dc46 GP |
225 | l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS; |
226 | l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS; | |
0139418c MH |
227 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
228 | } else { | |
229 | /* Raw socket can send/recv signalling messages only */ | |
8db4dc46 GP |
230 | l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING; |
231 | l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING; | |
0139418c MH |
232 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
233 | } | |
234 | ||
235 | __l2cap_chan_link(l, sk); | |
236 | ||
237 | if (parent) | |
238 | bt_accept_enqueue(parent, sk); | |
239 | } | |
240 | ||
8e87d142 | 241 | /* Delete channel. |
0139418c MH |
242 | * Must be called on the locked socket. */ |
243 | static void l2cap_chan_del(struct sock *sk, int err) | |
244 | { | |
245 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
246 | struct sock *parent = bt_sk(sk)->parent; | |
247 | ||
248 | l2cap_sock_clear_timer(sk); | |
249 | ||
250 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
251 | ||
8e87d142 | 252 | if (conn) { |
0139418c MH |
253 | /* Unlink from channel list */ |
254 | l2cap_chan_unlink(&conn->chan_list, sk); | |
255 | l2cap_pi(sk)->conn = NULL; | |
256 | hci_conn_put(conn->hcon); | |
257 | } | |
258 | ||
b1235d79 | 259 | sk->sk_state = BT_CLOSED; |
0139418c MH |
260 | sock_set_flag(sk, SOCK_ZAPPED); |
261 | ||
262 | if (err) | |
263 | sk->sk_err = err; | |
264 | ||
265 | if (parent) { | |
266 | bt_accept_unlink(sk); | |
267 | parent->sk_data_ready(parent, 0); | |
268 | } else | |
269 | sk->sk_state_change(sk); | |
270 | } | |
271 | ||
79d554a6 | 272 | /* Service level security */ |
2af6b9d5 | 273 | static inline int l2cap_check_security(struct sock *sk) |
79d554a6 MH |
274 | { |
275 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
0684e5f9 MH |
276 | __u8 auth_type; |
277 | ||
00ae4af9 MH |
278 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
279 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
280 | auth_type = HCI_AT_NO_BONDING_MITM; | |
281 | else | |
af05b30b | 282 | auth_type = HCI_AT_NO_BONDING; |
00ae4af9 MH |
283 | |
284 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
285 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
286 | } else { | |
287 | switch (l2cap_pi(sk)->sec_level) { | |
288 | case BT_SECURITY_HIGH: | |
289 | auth_type = HCI_AT_GENERAL_BONDING_MITM; | |
290 | break; | |
291 | case BT_SECURITY_MEDIUM: | |
292 | auth_type = HCI_AT_GENERAL_BONDING; | |
293 | break; | |
294 | default: | |
295 | auth_type = HCI_AT_NO_BONDING; | |
296 | break; | |
297 | } | |
0684e5f9 | 298 | } |
79d554a6 | 299 | |
0684e5f9 MH |
300 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
301 | auth_type); | |
79d554a6 MH |
302 | } |
303 | ||
4e8402a3 MH |
304 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
305 | { | |
306 | u8 id; | |
307 | ||
308 | /* Get next available identificator. | |
309 | * 1 - 128 are used by kernel. | |
310 | * 129 - 199 are reserved. | |
311 | * 200 - 254 are used by utilities like l2ping, etc. | |
312 | */ | |
313 | ||
314 | spin_lock_bh(&conn->lock); | |
315 | ||
316 | if (++conn->tx_ident > 128) | |
317 | conn->tx_ident = 1; | |
318 | ||
319 | id = conn->tx_ident; | |
320 | ||
321 | spin_unlock_bh(&conn->lock); | |
322 | ||
323 | return id; | |
324 | } | |
325 | ||
326 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) | |
327 | { | |
328 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); | |
329 | ||
330 | BT_DBG("code 0x%2.2x", code); | |
331 | ||
332 | if (!skb) | |
333 | return -ENOMEM; | |
334 | ||
335 | return hci_send_acl(conn->hcon, skb, 0); | |
336 | } | |
337 | ||
1c2acffb GP |
338 | static inline int l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control) |
339 | { | |
340 | struct sk_buff *skb; | |
341 | struct l2cap_hdr *lh; | |
342 | struct l2cap_conn *conn = pi->conn; | |
fcc203c3 GP |
343 | int count, hlen = L2CAP_HDR_SIZE + 2; |
344 | ||
345 | if (pi->fcs == L2CAP_FCS_CRC16) | |
346 | hlen += 2; | |
1c2acffb GP |
347 | |
348 | BT_DBG("pi %p, control 0x%2.2x", pi, control); | |
349 | ||
fcc203c3 | 350 | count = min_t(unsigned int, conn->mtu, hlen); |
1c2acffb GP |
351 | control |= L2CAP_CTRL_FRAME_TYPE; |
352 | ||
353 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
354 | if (!skb) | |
355 | return -ENOMEM; | |
356 | ||
357 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
fcc203c3 | 358 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
1c2acffb GP |
359 | lh->cid = cpu_to_le16(pi->dcid); |
360 | put_unaligned_le16(control, skb_put(skb, 2)); | |
361 | ||
fcc203c3 GP |
362 | if (pi->fcs == L2CAP_FCS_CRC16) { |
363 | u16 fcs = crc16(0, (u8 *)lh, count - 2); | |
364 | put_unaligned_le16(fcs, skb_put(skb, 2)); | |
365 | } | |
366 | ||
1c2acffb GP |
367 | return hci_send_acl(pi->conn->hcon, skb, 0); |
368 | } | |
369 | ||
7e743090 GP |
370 | static inline int l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control) |
371 | { | |
372 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) | |
373 | control |= L2CAP_SUPER_RCV_NOT_READY; | |
374 | else | |
375 | control |= L2CAP_SUPER_RCV_READY; | |
376 | ||
2ab25cdd GP |
377 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
378 | ||
7e743090 GP |
379 | return l2cap_send_sframe(pi, control); |
380 | } | |
381 | ||
79d554a6 MH |
382 | static void l2cap_do_start(struct sock *sk) |
383 | { | |
384 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
385 | ||
386 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { | |
984947dc MH |
387 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
388 | return; | |
389 | ||
2af6b9d5 | 390 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
391 | struct l2cap_conn_req req; |
392 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
393 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 394 | |
b1235d79 | 395 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 396 | |
b1235d79 | 397 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
79d554a6 | 398 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 399 | } |
79d554a6 MH |
400 | } else { |
401 | struct l2cap_info_req req; | |
402 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
403 | ||
404 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
405 | conn->info_ident = l2cap_get_ident(conn); | |
406 | ||
407 | mod_timer(&conn->info_timer, jiffies + | |
408 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
409 | ||
410 | l2cap_send_cmd(conn, conn->info_ident, | |
411 | L2CAP_INFO_REQ, sizeof(req), &req); | |
412 | } | |
413 | } | |
414 | ||
22121fc9 GP |
415 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk) |
416 | { | |
417 | struct l2cap_disconn_req req; | |
418 | ||
419 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
420 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
421 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
422 | L2CAP_DISCONN_REQ, sizeof(req), &req); | |
423 | } | |
424 | ||
1da177e4 | 425 | /* ---- L2CAP connections ---- */ |
4e8402a3 MH |
426 | static void l2cap_conn_start(struct l2cap_conn *conn) |
427 | { | |
428 | struct l2cap_chan_list *l = &conn->chan_list; | |
429 | struct sock *sk; | |
430 | ||
431 | BT_DBG("conn %p", conn); | |
432 | ||
433 | read_lock(&l->lock); | |
434 | ||
435 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
436 | bh_lock_sock(sk); | |
437 | ||
438 | if (sk->sk_type != SOCK_SEQPACKET) { | |
79d554a6 MH |
439 | bh_unlock_sock(sk); |
440 | continue; | |
441 | } | |
442 | ||
443 | if (sk->sk_state == BT_CONNECT) { | |
2af6b9d5 | 444 | if (l2cap_check_security(sk)) { |
b1235d79 MH |
445 | struct l2cap_conn_req req; |
446 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
447 | req.psm = l2cap_pi(sk)->psm; | |
79d554a6 | 448 | |
b1235d79 | 449 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
79d554a6 | 450 | |
b1235d79 | 451 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
4e8402a3 | 452 | L2CAP_CONN_REQ, sizeof(req), &req); |
b1235d79 | 453 | } |
79d554a6 MH |
454 | } else if (sk->sk_state == BT_CONNECT2) { |
455 | struct l2cap_conn_rsp rsp; | |
456 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
457 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
458 | ||
2af6b9d5 | 459 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
460 | if (bt_sk(sk)->defer_setup) { |
461 | struct sock *parent = bt_sk(sk)->parent; | |
462 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
463 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); | |
464 | parent->sk_data_ready(parent, 0); | |
465 | ||
466 | } else { | |
467 | sk->sk_state = BT_CONFIG; | |
468 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
469 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
470 | } | |
79d554a6 MH |
471 | } else { |
472 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); | |
473 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); | |
474 | } | |
475 | ||
476 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
477 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
4e8402a3 MH |
478 | } |
479 | ||
480 | bh_unlock_sock(sk); | |
481 | } | |
482 | ||
483 | read_unlock(&l->lock); | |
484 | } | |
485 | ||
486 | static void l2cap_conn_ready(struct l2cap_conn *conn) | |
487 | { | |
79d554a6 MH |
488 | struct l2cap_chan_list *l = &conn->chan_list; |
489 | struct sock *sk; | |
4e8402a3 | 490 | |
79d554a6 | 491 | BT_DBG("conn %p", conn); |
4e8402a3 | 492 | |
79d554a6 | 493 | read_lock(&l->lock); |
4e8402a3 | 494 | |
79d554a6 MH |
495 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
496 | bh_lock_sock(sk); | |
4e8402a3 | 497 | |
79d554a6 MH |
498 | if (sk->sk_type != SOCK_SEQPACKET) { |
499 | l2cap_sock_clear_timer(sk); | |
500 | sk->sk_state = BT_CONNECTED; | |
501 | sk->sk_state_change(sk); | |
502 | } else if (sk->sk_state == BT_CONNECT) | |
503 | l2cap_do_start(sk); | |
4e8402a3 | 504 | |
79d554a6 | 505 | bh_unlock_sock(sk); |
4e8402a3 | 506 | } |
79d554a6 MH |
507 | |
508 | read_unlock(&l->lock); | |
4e8402a3 MH |
509 | } |
510 | ||
511 | /* Notify sockets that we cannot guaranty reliability anymore */ | |
512 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) | |
513 | { | |
514 | struct l2cap_chan_list *l = &conn->chan_list; | |
515 | struct sock *sk; | |
516 | ||
517 | BT_DBG("conn %p", conn); | |
518 | ||
519 | read_lock(&l->lock); | |
520 | ||
521 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2af6b9d5 | 522 | if (l2cap_pi(sk)->force_reliable) |
4e8402a3 MH |
523 | sk->sk_err = err; |
524 | } | |
525 | ||
526 | read_unlock(&l->lock); | |
527 | } | |
528 | ||
529 | static void l2cap_info_timeout(unsigned long arg) | |
530 | { | |
531 | struct l2cap_conn *conn = (void *) arg; | |
532 | ||
984947dc | 533 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 534 | conn->info_ident = 0; |
984947dc | 535 | |
4e8402a3 MH |
536 | l2cap_conn_start(conn); |
537 | } | |
538 | ||
1da177e4 LT |
539 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
540 | { | |
0139418c | 541 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 542 | |
0139418c | 543 | if (conn || status) |
1da177e4 LT |
544 | return conn; |
545 | ||
0139418c MH |
546 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
547 | if (!conn) | |
1da177e4 | 548 | return NULL; |
1da177e4 LT |
549 | |
550 | hcon->l2cap_data = conn; | |
551 | conn->hcon = hcon; | |
552 | ||
0139418c MH |
553 | BT_DBG("hcon %p conn %p", hcon, conn); |
554 | ||
1da177e4 LT |
555 | conn->mtu = hcon->hdev->acl_mtu; |
556 | conn->src = &hcon->hdev->bdaddr; | |
557 | conn->dst = &hcon->dst; | |
558 | ||
4e8402a3 MH |
559 | conn->feat_mask = 0; |
560 | ||
1da177e4 LT |
561 | spin_lock_init(&conn->lock); |
562 | rwlock_init(&conn->chan_list.lock); | |
563 | ||
45054dc1 DY |
564 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
565 | (unsigned long) conn); | |
566 | ||
2950f21a MH |
567 | conn->disc_reason = 0x13; |
568 | ||
1da177e4 LT |
569 | return conn; |
570 | } | |
571 | ||
0139418c | 572 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
1da177e4 | 573 | { |
0139418c | 574 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 LT |
575 | struct sock *sk; |
576 | ||
0139418c MH |
577 | if (!conn) |
578 | return; | |
1da177e4 LT |
579 | |
580 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
581 | ||
7585b97a | 582 | kfree_skb(conn->rx_skb); |
1da177e4 LT |
583 | |
584 | /* Kill channels */ | |
585 | while ((sk = conn->chan_list.head)) { | |
586 | bh_lock_sock(sk); | |
587 | l2cap_chan_del(sk, err); | |
588 | bh_unlock_sock(sk); | |
589 | l2cap_sock_kill(sk); | |
590 | } | |
591 | ||
8e8440f5 DY |
592 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
593 | del_timer_sync(&conn->info_timer); | |
3ab22731 | 594 | |
1da177e4 LT |
595 | hcon->l2cap_data = NULL; |
596 | kfree(conn); | |
1da177e4 LT |
597 | } |
598 | ||
599 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) | |
600 | { | |
601 | struct l2cap_chan_list *l = &conn->chan_list; | |
fd1278d7 | 602 | write_lock_bh(&l->lock); |
1da177e4 | 603 | __l2cap_chan_add(conn, sk, parent); |
fd1278d7 | 604 | write_unlock_bh(&l->lock); |
1da177e4 LT |
605 | } |
606 | ||
1da177e4 | 607 | /* ---- Socket interface ---- */ |
8e036fc3 | 608 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
1da177e4 LT |
609 | { |
610 | struct sock *sk; | |
611 | struct hlist_node *node; | |
612 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
613 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
614 | goto found; | |
615 | sk = NULL; | |
616 | found: | |
617 | return sk; | |
618 | } | |
619 | ||
620 | /* Find socket with psm and source bdaddr. | |
621 | * Returns closest match. | |
622 | */ | |
8e036fc3 | 623 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
624 | { |
625 | struct sock *sk = NULL, *sk1 = NULL; | |
626 | struct hlist_node *node; | |
627 | ||
628 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
629 | if (state && sk->sk_state != state) | |
630 | continue; | |
631 | ||
632 | if (l2cap_pi(sk)->psm == psm) { | |
633 | /* Exact match. */ | |
634 | if (!bacmp(&bt_sk(sk)->src, src)) | |
635 | break; | |
636 | ||
637 | /* Closest match */ | |
638 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
639 | sk1 = sk; | |
640 | } | |
641 | } | |
642 | return node ? sk : sk1; | |
643 | } | |
644 | ||
645 | /* Find socket with given address (psm, src). | |
646 | * Returns locked socket */ | |
8e036fc3 | 647 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
1da177e4 LT |
648 | { |
649 | struct sock *s; | |
650 | read_lock(&l2cap_sk_list.lock); | |
651 | s = __l2cap_get_sock_by_psm(state, psm, src); | |
af05b30b GP |
652 | if (s) |
653 | bh_lock_sock(s); | |
1da177e4 LT |
654 | read_unlock(&l2cap_sk_list.lock); |
655 | return s; | |
656 | } | |
657 | ||
658 | static void l2cap_sock_destruct(struct sock *sk) | |
659 | { | |
660 | BT_DBG("sk %p", sk); | |
661 | ||
662 | skb_queue_purge(&sk->sk_receive_queue); | |
663 | skb_queue_purge(&sk->sk_write_queue); | |
664 | } | |
665 | ||
666 | static void l2cap_sock_cleanup_listen(struct sock *parent) | |
667 | { | |
668 | struct sock *sk; | |
669 | ||
670 | BT_DBG("parent %p", parent); | |
671 | ||
672 | /* Close not yet accepted channels */ | |
673 | while ((sk = bt_accept_dequeue(parent, NULL))) | |
674 | l2cap_sock_close(sk); | |
675 | ||
b1235d79 | 676 | parent->sk_state = BT_CLOSED; |
1da177e4 LT |
677 | sock_set_flag(parent, SOCK_ZAPPED); |
678 | } | |
679 | ||
680 | /* Kill socket (only if zapped and orphan) | |
681 | * Must be called on unlocked socket. | |
682 | */ | |
683 | static void l2cap_sock_kill(struct sock *sk) | |
684 | { | |
685 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
686 | return; | |
687 | ||
688 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
689 | ||
690 | /* Kill poor orphan */ | |
691 | bt_sock_unlink(&l2cap_sk_list, sk); | |
692 | sock_set_flag(sk, SOCK_DEAD); | |
693 | sock_put(sk); | |
694 | } | |
695 | ||
696 | static void __l2cap_sock_close(struct sock *sk, int reason) | |
697 | { | |
698 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
699 | ||
700 | switch (sk->sk_state) { | |
701 | case BT_LISTEN: | |
702 | l2cap_sock_cleanup_listen(sk); | |
703 | break; | |
704 | ||
705 | case BT_CONNECTED: | |
706 | case BT_CONFIG: | |
1da177e4 LT |
707 | if (sk->sk_type == SOCK_SEQPACKET) { |
708 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1da177e4 LT |
709 | |
710 | sk->sk_state = BT_DISCONN; | |
711 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
22121fc9 | 712 | l2cap_send_disconn_req(conn, sk); |
b1235d79 | 713 | } else |
1da177e4 | 714 | l2cap_chan_del(sk, reason); |
1da177e4 LT |
715 | break; |
716 | ||
f66dc81f MH |
717 | case BT_CONNECT2: |
718 | if (sk->sk_type == SOCK_SEQPACKET) { | |
719 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
720 | struct l2cap_conn_rsp rsp; | |
721 | __u16 result; | |
722 | ||
723 | if (bt_sk(sk)->defer_setup) | |
724 | result = L2CAP_CR_SEC_BLOCK; | |
725 | else | |
726 | result = L2CAP_CR_BAD_PSM; | |
727 | ||
728 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
729 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
730 | rsp.result = cpu_to_le16(result); | |
731 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
732 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, | |
733 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
734 | } else | |
735 | l2cap_chan_del(sk, reason); | |
736 | break; | |
737 | ||
1da177e4 LT |
738 | case BT_CONNECT: |
739 | case BT_DISCONN: | |
740 | l2cap_chan_del(sk, reason); | |
741 | break; | |
742 | ||
743 | default: | |
744 | sock_set_flag(sk, SOCK_ZAPPED); | |
745 | break; | |
746 | } | |
747 | } | |
748 | ||
749 | /* Must be called on unlocked socket. */ | |
750 | static void l2cap_sock_close(struct sock *sk) | |
751 | { | |
752 | l2cap_sock_clear_timer(sk); | |
753 | lock_sock(sk); | |
754 | __l2cap_sock_close(sk, ECONNRESET); | |
755 | release_sock(sk); | |
756 | l2cap_sock_kill(sk); | |
757 | } | |
758 | ||
759 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
760 | { | |
761 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
762 | ||
763 | BT_DBG("sk %p", sk); | |
764 | ||
765 | if (parent) { | |
766 | sk->sk_type = parent->sk_type; | |
f66dc81f MH |
767 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
768 | ||
1da177e4 LT |
769 | pi->imtu = l2cap_pi(parent)->imtu; |
770 | pi->omtu = l2cap_pi(parent)->omtu; | |
c6b03cf9 MH |
771 | pi->mode = l2cap_pi(parent)->mode; |
772 | pi->fcs = l2cap_pi(parent)->fcs; | |
2af6b9d5 MH |
773 | pi->sec_level = l2cap_pi(parent)->sec_level; |
774 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
775 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
1da177e4 LT |
776 | } else { |
777 | pi->imtu = L2CAP_DEFAULT_MTU; | |
778 | pi->omtu = 0; | |
c6b03cf9 MH |
779 | pi->mode = L2CAP_MODE_BASIC; |
780 | pi->fcs = L2CAP_FCS_CRC16; | |
2af6b9d5 MH |
781 | pi->sec_level = BT_SECURITY_LOW; |
782 | pi->role_switch = 0; | |
783 | pi->force_reliable = 0; | |
1da177e4 LT |
784 | } |
785 | ||
786 | /* Default config options */ | |
5dee9e7c | 787 | pi->conf_len = 0; |
1da177e4 | 788 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
45054dc1 DY |
789 | skb_queue_head_init(TX_QUEUE(sk)); |
790 | skb_queue_head_init(SREJ_QUEUE(sk)); | |
791 | INIT_LIST_HEAD(SREJ_LIST(sk)); | |
1da177e4 LT |
792 | } |
793 | ||
794 | static struct proto l2cap_proto = { | |
795 | .name = "L2CAP", | |
796 | .owner = THIS_MODULE, | |
797 | .obj_size = sizeof(struct l2cap_pinfo) | |
798 | }; | |
799 | ||
1b8d7ae4 | 800 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
801 | { |
802 | struct sock *sk; | |
803 | ||
6257ff21 | 804 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
1da177e4 LT |
805 | if (!sk) |
806 | return NULL; | |
807 | ||
808 | sock_init_data(sock, sk); | |
809 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
810 | ||
811 | sk->sk_destruct = l2cap_sock_destruct; | |
4e8402a3 | 812 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
1da177e4 LT |
813 | |
814 | sock_reset_flag(sk, SOCK_ZAPPED); | |
815 | ||
816 | sk->sk_protocol = proto; | |
b1235d79 | 817 | sk->sk_state = BT_OPEN; |
1da177e4 | 818 | |
b1235d79 | 819 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
1da177e4 LT |
820 | |
821 | bt_sock_link(&l2cap_sk_list, sk); | |
822 | return sk; | |
823 | } | |
824 | ||
3f378b68 EP |
825 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, |
826 | int kern) | |
1da177e4 LT |
827 | { |
828 | struct sock *sk; | |
829 | ||
830 | BT_DBG("sock %p", sock); | |
831 | ||
832 | sock->state = SS_UNCONNECTED; | |
833 | ||
834 | if (sock->type != SOCK_SEQPACKET && | |
835 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
836 | return -ESOCKTNOSUPPORT; | |
837 | ||
c84b3268 | 838 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
1da177e4 LT |
839 | return -EPERM; |
840 | ||
841 | sock->ops = &l2cap_sock_ops; | |
842 | ||
1b8d7ae4 | 843 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
1da177e4 LT |
844 | if (!sk) |
845 | return -ENOMEM; | |
846 | ||
847 | l2cap_sock_init(sk, NULL); | |
848 | return 0; | |
849 | } | |
850 | ||
f29972de | 851 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
1da177e4 | 852 | { |
1da177e4 | 853 | struct sock *sk = sock->sk; |
f29972de MH |
854 | struct sockaddr_l2 la; |
855 | int len, err = 0; | |
1da177e4 | 856 | |
f29972de | 857 | BT_DBG("sk %p", sk); |
1da177e4 LT |
858 | |
859 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
860 | return -EINVAL; | |
861 | ||
f29972de MH |
862 | memset(&la, 0, sizeof(la)); |
863 | len = min_t(unsigned int, sizeof(la), alen); | |
864 | memcpy(&la, addr, len); | |
865 | ||
2a517ca6 MH |
866 | if (la.l2_cid) |
867 | return -EINVAL; | |
868 | ||
1da177e4 LT |
869 | lock_sock(sk); |
870 | ||
871 | if (sk->sk_state != BT_OPEN) { | |
872 | err = -EBADFD; | |
873 | goto done; | |
874 | } | |
875 | ||
b4324b5d | 876 | if (la.l2_psm && __le16_to_cpu(la.l2_psm) < 0x1001 && |
847641d7 MH |
877 | !capable(CAP_NET_BIND_SERVICE)) { |
878 | err = -EACCES; | |
879 | goto done; | |
880 | } | |
8e87d142 | 881 | |
1da177e4 LT |
882 | write_lock_bh(&l2cap_sk_list.lock); |
883 | ||
f29972de | 884 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
1da177e4 LT |
885 | err = -EADDRINUSE; |
886 | } else { | |
887 | /* Save source address */ | |
f29972de MH |
888 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
889 | l2cap_pi(sk)->psm = la.l2_psm; | |
890 | l2cap_pi(sk)->sport = la.l2_psm; | |
1da177e4 | 891 | sk->sk_state = BT_BOUND; |
2af6b9d5 | 892 | |
b4324b5d MH |
893 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
894 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
2af6b9d5 | 895 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
1da177e4 LT |
896 | } |
897 | ||
898 | write_unlock_bh(&l2cap_sk_list.lock); | |
899 | ||
900 | done: | |
901 | release_sock(sk); | |
902 | return err; | |
903 | } | |
904 | ||
905 | static int l2cap_do_connect(struct sock *sk) | |
906 | { | |
907 | bdaddr_t *src = &bt_sk(sk)->src; | |
908 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
909 | struct l2cap_conn *conn; | |
910 | struct hci_conn *hcon; | |
911 | struct hci_dev *hdev; | |
09ab6f4c | 912 | __u8 auth_type; |
44d0e48e | 913 | int err; |
1da177e4 | 914 | |
f29972de MH |
915 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
916 | l2cap_pi(sk)->psm); | |
1da177e4 | 917 | |
af05b30b GP |
918 | hdev = hci_get_route(dst, src); |
919 | if (!hdev) | |
1da177e4 LT |
920 | return -EHOSTUNREACH; |
921 | ||
922 | hci_dev_lock_bh(hdev); | |
923 | ||
924 | err = -ENOMEM; | |
925 | ||
8c1b2355 | 926 | if (sk->sk_type == SOCK_RAW) { |
2af6b9d5 MH |
927 | switch (l2cap_pi(sk)->sec_level) { |
928 | case BT_SECURITY_HIGH: | |
8c1b2355 | 929 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
2af6b9d5 MH |
930 | break; |
931 | case BT_SECURITY_MEDIUM: | |
8c1b2355 | 932 | auth_type = HCI_AT_DEDICATED_BONDING; |
2af6b9d5 MH |
933 | break; |
934 | default: | |
09ab6f4c | 935 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
936 | break; |
937 | } | |
8c1b2355 | 938 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
2af6b9d5 | 939 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
8c1b2355 | 940 | auth_type = HCI_AT_NO_BONDING_MITM; |
09ab6f4c | 941 | else |
8c1b2355 | 942 | auth_type = HCI_AT_NO_BONDING; |
435fef20 MH |
943 | |
944 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) | |
945 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
8c1b2355 | 946 | } else { |
2af6b9d5 MH |
947 | switch (l2cap_pi(sk)->sec_level) { |
948 | case BT_SECURITY_HIGH: | |
8c1b2355 | 949 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
2af6b9d5 MH |
950 | break; |
951 | case BT_SECURITY_MEDIUM: | |
09ab6f4c | 952 | auth_type = HCI_AT_GENERAL_BONDING; |
2af6b9d5 MH |
953 | break; |
954 | default: | |
8c1b2355 | 955 | auth_type = HCI_AT_NO_BONDING; |
2af6b9d5 MH |
956 | break; |
957 | } | |
09ab6f4c MH |
958 | } |
959 | ||
2af6b9d5 MH |
960 | hcon = hci_connect(hdev, ACL_LINK, dst, |
961 | l2cap_pi(sk)->sec_level, auth_type); | |
1da177e4 LT |
962 | if (!hcon) |
963 | goto done; | |
964 | ||
965 | conn = l2cap_conn_add(hcon, 0); | |
966 | if (!conn) { | |
967 | hci_conn_put(hcon); | |
968 | goto done; | |
969 | } | |
970 | ||
971 | err = 0; | |
972 | ||
973 | /* Update source addr of the socket */ | |
974 | bacpy(src, conn->src); | |
975 | ||
976 | l2cap_chan_add(conn, sk, NULL); | |
977 | ||
978 | sk->sk_state = BT_CONNECT; | |
979 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
980 | ||
981 | if (hcon->state == BT_CONNECTED) { | |
79d554a6 | 982 | if (sk->sk_type != SOCK_SEQPACKET) { |
1da177e4 LT |
983 | l2cap_sock_clear_timer(sk); |
984 | sk->sk_state = BT_CONNECTED; | |
79d554a6 MH |
985 | } else |
986 | l2cap_do_start(sk); | |
1da177e4 LT |
987 | } |
988 | ||
989 | done: | |
990 | hci_dev_unlock_bh(hdev); | |
991 | hci_dev_put(hdev); | |
992 | return err; | |
993 | } | |
994 | ||
995 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
996 | { | |
1da177e4 | 997 | struct sock *sk = sock->sk; |
f29972de MH |
998 | struct sockaddr_l2 la; |
999 | int len, err = 0; | |
1da177e4 | 1000 | |
1da177e4 LT |
1001 | BT_DBG("sk %p", sk); |
1002 | ||
2a517ca6 MH |
1003 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
1004 | return -EINVAL; | |
1da177e4 | 1005 | |
f29972de MH |
1006 | memset(&la, 0, sizeof(la)); |
1007 | len = min_t(unsigned int, sizeof(la), alen); | |
1008 | memcpy(&la, addr, len); | |
1009 | ||
2a517ca6 MH |
1010 | if (la.l2_cid) |
1011 | return -EINVAL; | |
1012 | ||
1013 | lock_sock(sk); | |
1014 | ||
f29972de | 1015 | if (sk->sk_type == SOCK_SEQPACKET && !la.l2_psm) { |
1da177e4 LT |
1016 | err = -EINVAL; |
1017 | goto done; | |
1018 | } | |
1019 | ||
c6b03cf9 MH |
1020 | switch (l2cap_pi(sk)->mode) { |
1021 | case L2CAP_MODE_BASIC: | |
1022 | break; | |
1023 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1024 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1025 | if (enable_ertm) |
1026 | break; | |
1027 | /* fall through */ | |
1028 | default: | |
1029 | err = -ENOTSUPP; | |
1030 | goto done; | |
1031 | } | |
1032 | ||
af05b30b | 1033 | switch (sk->sk_state) { |
1da177e4 LT |
1034 | case BT_CONNECT: |
1035 | case BT_CONNECT2: | |
1036 | case BT_CONFIG: | |
1037 | /* Already connecting */ | |
1038 | goto wait; | |
1039 | ||
1040 | case BT_CONNECTED: | |
1041 | /* Already connected */ | |
1042 | goto done; | |
1043 | ||
1044 | case BT_OPEN: | |
1045 | case BT_BOUND: | |
1046 | /* Can connect */ | |
1047 | break; | |
1048 | ||
1049 | default: | |
1050 | err = -EBADFD; | |
1051 | goto done; | |
1052 | } | |
1053 | ||
1054 | /* Set destination address and psm */ | |
f29972de MH |
1055 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
1056 | l2cap_pi(sk)->psm = la.l2_psm; | |
1da177e4 | 1057 | |
af05b30b GP |
1058 | err = l2cap_do_connect(sk); |
1059 | if (err) | |
1da177e4 LT |
1060 | goto done; |
1061 | ||
1062 | wait: | |
1063 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
1064 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
1065 | done: | |
1066 | release_sock(sk); | |
1067 | return err; | |
1068 | } | |
1069 | ||
1070 | static int l2cap_sock_listen(struct socket *sock, int backlog) | |
1071 | { | |
1072 | struct sock *sk = sock->sk; | |
1073 | int err = 0; | |
1074 | ||
1075 | BT_DBG("sk %p backlog %d", sk, backlog); | |
1076 | ||
1077 | lock_sock(sk); | |
1078 | ||
1079 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
1080 | err = -EBADFD; | |
1081 | goto done; | |
1082 | } | |
1083 | ||
c6b03cf9 MH |
1084 | switch (l2cap_pi(sk)->mode) { |
1085 | case L2CAP_MODE_BASIC: | |
1086 | break; | |
1087 | case L2CAP_MODE_ERTM: | |
f2fcfcd6 | 1088 | case L2CAP_MODE_STREAMING: |
c6b03cf9 MH |
1089 | if (enable_ertm) |
1090 | break; | |
1091 | /* fall through */ | |
1092 | default: | |
1093 | err = -ENOTSUPP; | |
1094 | goto done; | |
1095 | } | |
1096 | ||
1da177e4 LT |
1097 | if (!l2cap_pi(sk)->psm) { |
1098 | bdaddr_t *src = &bt_sk(sk)->src; | |
1099 | u16 psm; | |
1100 | ||
1101 | err = -EINVAL; | |
1102 | ||
1103 | write_lock_bh(&l2cap_sk_list.lock); | |
1104 | ||
1105 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
b4324b5d MH |
1106 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
1107 | l2cap_pi(sk)->psm = cpu_to_le16(psm); | |
1108 | l2cap_pi(sk)->sport = cpu_to_le16(psm); | |
1da177e4 LT |
1109 | err = 0; |
1110 | break; | |
1111 | } | |
1112 | ||
1113 | write_unlock_bh(&l2cap_sk_list.lock); | |
1114 | ||
1115 | if (err < 0) | |
1116 | goto done; | |
1117 | } | |
1118 | ||
1119 | sk->sk_max_ack_backlog = backlog; | |
1120 | sk->sk_ack_backlog = 0; | |
1121 | sk->sk_state = BT_LISTEN; | |
1122 | ||
1123 | done: | |
1124 | release_sock(sk); | |
1125 | return err; | |
1126 | } | |
1127 | ||
1128 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
1129 | { | |
1130 | DECLARE_WAITQUEUE(wait, current); | |
1131 | struct sock *sk = sock->sk, *nsk; | |
1132 | long timeo; | |
1133 | int err = 0; | |
1134 | ||
fcc70d5f | 1135 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1136 | |
1137 | if (sk->sk_state != BT_LISTEN) { | |
1138 | err = -EBADFD; | |
1139 | goto done; | |
1140 | } | |
1141 | ||
1142 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1143 | ||
1144 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
1145 | ||
1146 | /* Wait for an incoming connection. (wake-one). */ | |
1147 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
1148 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
1149 | set_current_state(TASK_INTERRUPTIBLE); | |
1150 | if (!timeo) { | |
1151 | err = -EAGAIN; | |
1152 | break; | |
1153 | } | |
1154 | ||
1155 | release_sock(sk); | |
1156 | timeo = schedule_timeout(timeo); | |
fcc70d5f | 1157 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
1158 | |
1159 | if (sk->sk_state != BT_LISTEN) { | |
1160 | err = -EBADFD; | |
1161 | break; | |
1162 | } | |
1163 | ||
1164 | if (signal_pending(current)) { | |
1165 | err = sock_intr_errno(timeo); | |
1166 | break; | |
1167 | } | |
1168 | } | |
1169 | set_current_state(TASK_RUNNING); | |
1170 | remove_wait_queue(sk->sk_sleep, &wait); | |
1171 | ||
1172 | if (err) | |
1173 | goto done; | |
1174 | ||
1175 | newsock->state = SS_CONNECTED; | |
1176 | ||
1177 | BT_DBG("new socket %p", nsk); | |
1178 | ||
1179 | done: | |
1180 | release_sock(sk); | |
1181 | return err; | |
1182 | } | |
1183 | ||
1184 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
1185 | { | |
1186 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
1187 | struct sock *sk = sock->sk; | |
1188 | ||
1189 | BT_DBG("sock %p, sk %p", sock, sk); | |
1190 | ||
1191 | addr->sa_family = AF_BLUETOOTH; | |
1192 | *len = sizeof(struct sockaddr_l2); | |
1193 | ||
f29972de MH |
1194 | if (peer) { |
1195 | la->l2_psm = l2cap_pi(sk)->psm; | |
1da177e4 | 1196 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
b4324b5d | 1197 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
f29972de MH |
1198 | } else { |
1199 | la->l2_psm = l2cap_pi(sk)->sport; | |
1da177e4 | 1200 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
b4324b5d | 1201 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
f29972de | 1202 | } |
1da177e4 | 1203 | |
1da177e4 LT |
1204 | return 0; |
1205 | } | |
1206 | ||
e90bac06 GP |
1207 | static void l2cap_monitor_timeout(unsigned long arg) |
1208 | { | |
1209 | struct sock *sk = (void *) arg; | |
1210 | u16 control; | |
1211 | ||
e686219a | 1212 | bh_lock_sock(sk); |
e90bac06 GP |
1213 | if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { |
1214 | l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk); | |
b13f5860 | 1215 | bh_unlock_sock(sk); |
e90bac06 GP |
1216 | return; |
1217 | } | |
1218 | ||
1219 | l2cap_pi(sk)->retry_count++; | |
1220 | __mod_monitor_timer(); | |
1221 | ||
1222 | control = L2CAP_CTRL_POLL; | |
7e743090 | 1223 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); |
e686219a | 1224 | bh_unlock_sock(sk); |
e90bac06 GP |
1225 | } |
1226 | ||
1227 | static void l2cap_retrans_timeout(unsigned long arg) | |
1228 | { | |
1229 | struct sock *sk = (void *) arg; | |
1230 | u16 control; | |
1231 | ||
e686219a | 1232 | bh_lock_sock(sk); |
e90bac06 GP |
1233 | l2cap_pi(sk)->retry_count = 1; |
1234 | __mod_monitor_timer(); | |
1235 | ||
1236 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; | |
1237 | ||
1238 | control = L2CAP_CTRL_POLL; | |
7e743090 | 1239 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); |
e686219a | 1240 | bh_unlock_sock(sk); |
e90bac06 GP |
1241 | } |
1242 | ||
1c2acffb | 1243 | static void l2cap_drop_acked_frames(struct sock *sk) |
1da177e4 | 1244 | { |
1c2acffb | 1245 | struct sk_buff *skb; |
1da177e4 | 1246 | |
1c2acffb GP |
1247 | while ((skb = skb_peek(TX_QUEUE(sk)))) { |
1248 | if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq) | |
1249 | break; | |
1da177e4 | 1250 | |
1c2acffb GP |
1251 | skb = skb_dequeue(TX_QUEUE(sk)); |
1252 | kfree_skb(skb); | |
1da177e4 | 1253 | |
1c2acffb GP |
1254 | l2cap_pi(sk)->unacked_frames--; |
1255 | } | |
1da177e4 | 1256 | |
e90bac06 GP |
1257 | if (!l2cap_pi(sk)->unacked_frames) |
1258 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
1259 | ||
1c2acffb GP |
1260 | return; |
1261 | } | |
1da177e4 | 1262 | |
1c2acffb GP |
1263 | static inline int l2cap_do_send(struct sock *sk, struct sk_buff *skb) |
1264 | { | |
1265 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1266 | int err; | |
1267 | ||
1268 | BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len); | |
1da177e4 | 1269 | |
1c2acffb GP |
1270 | err = hci_send_acl(pi->conn->hcon, skb, 0); |
1271 | if (err < 0) | |
1272 | kfree_skb(skb); | |
1273 | ||
1274 | return err; | |
1275 | } | |
1276 | ||
6840ed07 GP |
1277 | static int l2cap_streaming_send(struct sock *sk) |
1278 | { | |
1279 | struct sk_buff *skb, *tx_skb; | |
1280 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1281 | u16 control, fcs; |
6840ed07 GP |
1282 | int err; |
1283 | ||
1284 | while ((skb = sk->sk_send_head)) { | |
1285 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1286 | ||
1287 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
1288 | control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; | |
1289 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1290 | ||
fcc203c3 GP |
1291 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { |
1292 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1293 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1294 | } | |
1295 | ||
6840ed07 GP |
1296 | err = l2cap_do_send(sk, tx_skb); |
1297 | if (err < 0) { | |
1298 | l2cap_send_disconn_req(pi->conn, sk); | |
1299 | return err; | |
1300 | } | |
1301 | ||
1302 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1303 | ||
1304 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1305 | sk->sk_send_head = NULL; | |
1306 | else | |
1307 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
1308 | ||
1309 | skb = skb_dequeue(TX_QUEUE(sk)); | |
1310 | kfree_skb(skb); | |
1311 | } | |
1312 | return 0; | |
1313 | } | |
1314 | ||
8f17154f GP |
1315 | static int l2cap_retransmit_frame(struct sock *sk, u8 tx_seq) |
1316 | { | |
1317 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1318 | struct sk_buff *skb, *tx_skb; | |
1319 | u16 control, fcs; | |
1320 | int err; | |
1321 | ||
1322 | skb = skb_peek(TX_QUEUE(sk)); | |
1323 | do { | |
1324 | if (bt_cb(skb)->tx_seq != tx_seq) { | |
1325 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1326 | break; | |
1327 | skb = skb_queue_next(TX_QUEUE(sk), skb); | |
1328 | continue; | |
1329 | } | |
1330 | ||
1331 | if (pi->remote_max_tx && | |
1332 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
1333 | l2cap_send_disconn_req(pi->conn, sk); | |
1334 | break; | |
1335 | } | |
1336 | ||
1337 | tx_skb = skb_clone(skb, GFP_ATOMIC); | |
1338 | bt_cb(skb)->retries++; | |
1339 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); | |
9f121a5a | 1340 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
8f17154f GP |
1341 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
1342 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1343 | ||
1344 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { | |
1345 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); | |
1346 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); | |
1347 | } | |
1348 | ||
1349 | err = l2cap_do_send(sk, tx_skb); | |
1350 | if (err < 0) { | |
1351 | l2cap_send_disconn_req(pi->conn, sk); | |
1352 | return err; | |
1353 | } | |
1354 | break; | |
1355 | } while(1); | |
1356 | return 0; | |
1357 | } | |
1358 | ||
1c2acffb GP |
1359 | static int l2cap_ertm_send(struct sock *sk) |
1360 | { | |
1361 | struct sk_buff *skb, *tx_skb; | |
1362 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
fcc203c3 | 1363 | u16 control, fcs; |
1c2acffb GP |
1364 | int err; |
1365 | ||
e90bac06 GP |
1366 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
1367 | return 0; | |
1368 | ||
f64f9e71 JP |
1369 | while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk)) && |
1370 | !(pi->conn_state & L2CAP_CONN_REMOTE_BUSY)) { | |
1c2acffb GP |
1371 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
1372 | ||
e90bac06 GP |
1373 | if (pi->remote_max_tx && |
1374 | bt_cb(skb)->retries == pi->remote_max_tx) { | |
1375 | l2cap_send_disconn_req(pi->conn, sk); | |
1376 | break; | |
1377 | } | |
1378 | ||
1379 | bt_cb(skb)->retries++; | |
1380 | ||
1c2acffb | 1381 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
9f121a5a | 1382 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
1c2acffb GP |
1383 | | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
1384 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); | |
1385 | ||
e90bac06 | 1386 | |
fcc203c3 GP |
1387 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { |
1388 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); | |
1389 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); | |
1390 | } | |
1391 | ||
1c2acffb GP |
1392 | err = l2cap_do_send(sk, tx_skb); |
1393 | if (err < 0) { | |
1394 | l2cap_send_disconn_req(pi->conn, sk); | |
1395 | return err; | |
1396 | } | |
e90bac06 | 1397 | __mod_retrans_timer(); |
1c2acffb GP |
1398 | |
1399 | bt_cb(skb)->tx_seq = pi->next_tx_seq; | |
1400 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; | |
1401 | ||
1402 | pi->unacked_frames++; | |
1403 | ||
1404 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) | |
1405 | sk->sk_send_head = NULL; | |
1406 | else | |
1407 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); | |
1408 | } | |
1409 | ||
1410 | return 0; | |
1411 | } | |
1412 | ||
1413 | static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb) | |
1414 | { | |
1415 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1416 | struct sk_buff **frag; | |
1417 | int err, sent = 0; | |
1da177e4 LT |
1418 | |
1419 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
1c2acffb | 1420 | return -EFAULT; |
1da177e4 LT |
1421 | } |
1422 | ||
1423 | sent += count; | |
1424 | len -= count; | |
1425 | ||
1426 | /* Continuation fragments (no L2CAP header) */ | |
1427 | frag = &skb_shinfo(skb)->frag_list; | |
1428 | while (len) { | |
1429 | count = min_t(unsigned int, conn->mtu, len); | |
1430 | ||
1431 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); | |
1432 | if (!*frag) | |
1c2acffb GP |
1433 | return -EFAULT; |
1434 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) | |
1435 | return -EFAULT; | |
1da177e4 LT |
1436 | |
1437 | sent += count; | |
1438 | len -= count; | |
1439 | ||
1440 | frag = &(*frag)->next; | |
1441 | } | |
1da177e4 LT |
1442 | |
1443 | return sent; | |
1c2acffb | 1444 | } |
1da177e4 | 1445 | |
1c2acffb GP |
1446 | static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
1447 | { | |
1448 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1449 | struct sk_buff *skb; | |
1450 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1451 | struct l2cap_hdr *lh; | |
1452 | ||
1453 | BT_DBG("sk %p len %d", sk, (int)len); | |
1454 | ||
1455 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1456 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1457 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1458 | if (!skb) | |
1459 | return ERR_PTR(-ENOMEM); | |
1460 | ||
1461 | /* Create L2CAP header */ | |
1462 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1463 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1464 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1465 | put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2)); | |
1466 | ||
1467 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1468 | if (unlikely(err < 0)) { | |
1469 | kfree_skb(skb); | |
1470 | return ERR_PTR(err); | |
1471 | } | |
1472 | return skb; | |
1473 | } | |
1474 | ||
1475 | static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len) | |
1476 | { | |
1477 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1478 | struct sk_buff *skb; | |
1479 | int err, count, hlen = L2CAP_HDR_SIZE; | |
1480 | struct l2cap_hdr *lh; | |
1481 | ||
1482 | BT_DBG("sk %p len %d", sk, (int)len); | |
1483 | ||
1484 | count = min_t(unsigned int, (conn->mtu - hlen), len); | |
1485 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1486 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1487 | if (!skb) | |
1488 | return ERR_PTR(-ENOMEM); | |
1489 | ||
1490 | /* Create L2CAP header */ | |
1491 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1492 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1493 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1494 | ||
1495 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1496 | if (unlikely(err < 0)) { | |
1497 | kfree_skb(skb); | |
1498 | return ERR_PTR(err); | |
1499 | } | |
1500 | return skb; | |
1501 | } | |
1502 | ||
6840ed07 | 1503 | static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
1c2acffb GP |
1504 | { |
1505 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
1506 | struct sk_buff *skb; | |
1507 | int err, count, hlen = L2CAP_HDR_SIZE + 2; | |
1508 | struct l2cap_hdr *lh; | |
1509 | ||
1510 | BT_DBG("sk %p len %d", sk, (int)len); | |
1511 | ||
c74e560c GP |
1512 | if (sdulen) |
1513 | hlen += 2; | |
1514 | ||
fcc203c3 GP |
1515 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1516 | hlen += 2; | |
1517 | ||
1c2acffb GP |
1518 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
1519 | skb = bt_skb_send_alloc(sk, count + hlen, | |
1520 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1521 | if (!skb) | |
1522 | return ERR_PTR(-ENOMEM); | |
1523 | ||
1524 | /* Create L2CAP header */ | |
1525 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
1526 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1527 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); | |
1528 | put_unaligned_le16(control, skb_put(skb, 2)); | |
c74e560c GP |
1529 | if (sdulen) |
1530 | put_unaligned_le16(sdulen, skb_put(skb, 2)); | |
1c2acffb GP |
1531 | |
1532 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); | |
1533 | if (unlikely(err < 0)) { | |
1534 | kfree_skb(skb); | |
1535 | return ERR_PTR(err); | |
1536 | } | |
e90bac06 | 1537 | |
fcc203c3 GP |
1538 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
1539 | put_unaligned_le16(0, skb_put(skb, 2)); | |
1540 | ||
e90bac06 | 1541 | bt_cb(skb)->retries = 0; |
1c2acffb | 1542 | return skb; |
1da177e4 LT |
1543 | } |
1544 | ||
c74e560c GP |
1545 | static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len) |
1546 | { | |
1547 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1548 | struct sk_buff *skb; | |
1549 | struct sk_buff_head sar_queue; | |
1550 | u16 control; | |
1551 | size_t size = 0; | |
1552 | ||
1553 | __skb_queue_head_init(&sar_queue); | |
1554 | control = L2CAP_SDU_START; | |
6840ed07 | 1555 | skb = l2cap_create_iframe_pdu(sk, msg, pi->max_pdu_size, control, len); |
c74e560c GP |
1556 | if (IS_ERR(skb)) |
1557 | return PTR_ERR(skb); | |
1558 | ||
1559 | __skb_queue_tail(&sar_queue, skb); | |
1560 | len -= pi->max_pdu_size; | |
1561 | size +=pi->max_pdu_size; | |
1562 | control = 0; | |
1563 | ||
1564 | while (len > 0) { | |
1565 | size_t buflen; | |
1566 | ||
1567 | if (len > pi->max_pdu_size) { | |
1568 | control |= L2CAP_SDU_CONTINUE; | |
1569 | buflen = pi->max_pdu_size; | |
1570 | } else { | |
1571 | control |= L2CAP_SDU_END; | |
1572 | buflen = len; | |
1573 | } | |
1574 | ||
6840ed07 | 1575 | skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0); |
c74e560c GP |
1576 | if (IS_ERR(skb)) { |
1577 | skb_queue_purge(&sar_queue); | |
1578 | return PTR_ERR(skb); | |
1579 | } | |
1580 | ||
1581 | __skb_queue_tail(&sar_queue, skb); | |
1582 | len -= buflen; | |
1583 | size += buflen; | |
1584 | control = 0; | |
1585 | } | |
1586 | skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk)); | |
1587 | if (sk->sk_send_head == NULL) | |
1588 | sk->sk_send_head = sar_queue.next; | |
1589 | ||
1590 | return size; | |
1591 | } | |
1592 | ||
1da177e4 LT |
1593 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
1594 | { | |
1595 | struct sock *sk = sock->sk; | |
1c2acffb GP |
1596 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
1597 | struct sk_buff *skb; | |
1598 | u16 control; | |
1599 | int err; | |
1da177e4 LT |
1600 | |
1601 | BT_DBG("sock %p, sk %p", sock, sk); | |
1602 | ||
c1cbe4b7 BL |
1603 | err = sock_error(sk); |
1604 | if (err) | |
1605 | return err; | |
1da177e4 LT |
1606 | |
1607 | if (msg->msg_flags & MSG_OOB) | |
1608 | return -EOPNOTSUPP; | |
1609 | ||
1610 | /* Check outgoing MTU */ | |
f64f9e71 JP |
1611 | if (sk->sk_type == SOCK_SEQPACKET && pi->mode == L2CAP_MODE_BASIC && |
1612 | len > pi->omtu) | |
1da177e4 LT |
1613 | return -EINVAL; |
1614 | ||
1615 | lock_sock(sk); | |
1616 | ||
1c2acffb | 1617 | if (sk->sk_state != BT_CONNECTED) { |
1da177e4 | 1618 | err = -ENOTCONN; |
1c2acffb GP |
1619 | goto done; |
1620 | } | |
1da177e4 | 1621 | |
1c2acffb GP |
1622 | /* Connectionless channel */ |
1623 | if (sk->sk_type == SOCK_DGRAM) { | |
1624 | skb = l2cap_create_connless_pdu(sk, msg, len); | |
1625 | err = l2cap_do_send(sk, skb); | |
1626 | goto done; | |
1627 | } | |
1628 | ||
1629 | switch (pi->mode) { | |
1630 | case L2CAP_MODE_BASIC: | |
1631 | /* Create a basic PDU */ | |
1632 | skb = l2cap_create_basic_pdu(sk, msg, len); | |
1633 | if (IS_ERR(skb)) { | |
1634 | err = PTR_ERR(skb); | |
1635 | goto done; | |
1636 | } | |
1637 | ||
1638 | err = l2cap_do_send(sk, skb); | |
1639 | if (!err) | |
1640 | err = len; | |
1641 | break; | |
1642 | ||
1643 | case L2CAP_MODE_ERTM: | |
6840ed07 | 1644 | case L2CAP_MODE_STREAMING: |
1c2acffb | 1645 | /* Entire SDU fits into one PDU */ |
c74e560c | 1646 | if (len <= pi->max_pdu_size) { |
1c2acffb | 1647 | control = L2CAP_SDU_UNSEGMENTED; |
6840ed07 | 1648 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
1c2acffb GP |
1649 | if (IS_ERR(skb)) { |
1650 | err = PTR_ERR(skb); | |
1651 | goto done; | |
1652 | } | |
c74e560c GP |
1653 | __skb_queue_tail(TX_QUEUE(sk), skb); |
1654 | if (sk->sk_send_head == NULL) | |
1655 | sk->sk_send_head = skb; | |
1c2acffb | 1656 | } else { |
c74e560c GP |
1657 | /* Segment SDU into multiples PDUs */ |
1658 | err = l2cap_sar_segment_sdu(sk, msg, len); | |
1659 | if (err < 0) | |
1660 | goto done; | |
1c2acffb | 1661 | } |
1c2acffb | 1662 | |
6840ed07 GP |
1663 | if (pi->mode == L2CAP_MODE_STREAMING) |
1664 | err = l2cap_streaming_send(sk); | |
1665 | else | |
1666 | err = l2cap_ertm_send(sk); | |
1667 | ||
1c2acffb GP |
1668 | if (!err) |
1669 | err = len; | |
1670 | break; | |
1671 | ||
1672 | default: | |
1673 | BT_DBG("bad state %1.1x", pi->mode); | |
1674 | err = -EINVAL; | |
1675 | } | |
1676 | ||
1677 | done: | |
1da177e4 LT |
1678 | release_sock(sk); |
1679 | return err; | |
1680 | } | |
1681 | ||
f66dc81f MH |
1682 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
1683 | { | |
1684 | struct sock *sk = sock->sk; | |
1685 | ||
1686 | lock_sock(sk); | |
1687 | ||
1688 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
1689 | struct l2cap_conn_rsp rsp; | |
1690 | ||
1691 | sk->sk_state = BT_CONFIG; | |
1692 | ||
1693 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1694 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
1695 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
1696 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
1697 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
1698 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
1699 | ||
1700 | release_sock(sk); | |
1701 | return 0; | |
1702 | } | |
1703 | ||
1704 | release_sock(sk); | |
1705 | ||
1706 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1707 | } | |
1708 | ||
b7058842 | 1709 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
1710 | { |
1711 | struct sock *sk = sock->sk; | |
1712 | struct l2cap_options opts; | |
f29972de | 1713 | int len, err = 0; |
1da177e4 LT |
1714 | u32 opt; |
1715 | ||
1716 | BT_DBG("sk %p", sk); | |
1717 | ||
1718 | lock_sock(sk); | |
1719 | ||
1720 | switch (optname) { | |
1721 | case L2CAP_OPTIONS: | |
0878b666 MH |
1722 | opts.imtu = l2cap_pi(sk)->imtu; |
1723 | opts.omtu = l2cap_pi(sk)->omtu; | |
1724 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1725 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1726 | opts.fcs = l2cap_pi(sk)->fcs; |
0878b666 | 1727 | |
1da177e4 LT |
1728 | len = min_t(unsigned int, sizeof(opts), optlen); |
1729 | if (copy_from_user((char *) &opts, optval, len)) { | |
1730 | err = -EFAULT; | |
1731 | break; | |
1732 | } | |
0878b666 | 1733 | |
c6b03cf9 MH |
1734 | l2cap_pi(sk)->imtu = opts.imtu; |
1735 | l2cap_pi(sk)->omtu = opts.omtu; | |
1736 | l2cap_pi(sk)->mode = opts.mode; | |
fcc203c3 | 1737 | l2cap_pi(sk)->fcs = opts.fcs; |
1da177e4 LT |
1738 | break; |
1739 | ||
1740 | case L2CAP_LM: | |
1741 | if (get_user(opt, (u32 __user *) optval)) { | |
1742 | err = -EFAULT; | |
1743 | break; | |
1744 | } | |
1745 | ||
2af6b9d5 MH |
1746 | if (opt & L2CAP_LM_AUTH) |
1747 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
1748 | if (opt & L2CAP_LM_ENCRYPT) | |
1749 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
1750 | if (opt & L2CAP_LM_SECURE) | |
1751 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
1752 | ||
1753 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
1754 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
1da177e4 LT |
1755 | break; |
1756 | ||
1757 | default: | |
1758 | err = -ENOPROTOOPT; | |
1759 | break; | |
1760 | } | |
1761 | ||
1762 | release_sock(sk); | |
1763 | return err; | |
1764 | } | |
1765 | ||
b7058842 | 1766 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
d58daf42 MH |
1767 | { |
1768 | struct sock *sk = sock->sk; | |
2af6b9d5 MH |
1769 | struct bt_security sec; |
1770 | int len, err = 0; | |
f66dc81f | 1771 | u32 opt; |
d58daf42 MH |
1772 | |
1773 | BT_DBG("sk %p", sk); | |
1774 | ||
1775 | if (level == SOL_L2CAP) | |
1776 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
1777 | ||
0588d94f MH |
1778 | if (level != SOL_BLUETOOTH) |
1779 | return -ENOPROTOOPT; | |
1780 | ||
d58daf42 MH |
1781 | lock_sock(sk); |
1782 | ||
1783 | switch (optname) { | |
2af6b9d5 | 1784 | case BT_SECURITY: |
2526d3d8 | 1785 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1786 | err = -EINVAL; |
1787 | break; | |
1788 | } | |
1789 | ||
2af6b9d5 MH |
1790 | sec.level = BT_SECURITY_LOW; |
1791 | ||
1792 | len = min_t(unsigned int, sizeof(sec), optlen); | |
1793 | if (copy_from_user((char *) &sec, optval, len)) { | |
1794 | err = -EFAULT; | |
1795 | break; | |
1796 | } | |
1797 | ||
1798 | if (sec.level < BT_SECURITY_LOW || | |
1799 | sec.level > BT_SECURITY_HIGH) { | |
1800 | err = -EINVAL; | |
1801 | break; | |
1802 | } | |
1803 | ||
1804 | l2cap_pi(sk)->sec_level = sec.level; | |
1805 | break; | |
1806 | ||
f66dc81f MH |
1807 | case BT_DEFER_SETUP: |
1808 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1809 | err = -EINVAL; | |
1810 | break; | |
1811 | } | |
1812 | ||
1813 | if (get_user(opt, (u32 __user *) optval)) { | |
1814 | err = -EFAULT; | |
1815 | break; | |
1816 | } | |
1817 | ||
1818 | bt_sk(sk)->defer_setup = opt; | |
1819 | break; | |
1820 | ||
d58daf42 MH |
1821 | default: |
1822 | err = -ENOPROTOOPT; | |
1823 | break; | |
1824 | } | |
1825 | ||
1826 | release_sock(sk); | |
1827 | return err; | |
1828 | } | |
1829 | ||
1830 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
1831 | { |
1832 | struct sock *sk = sock->sk; | |
1833 | struct l2cap_options opts; | |
1834 | struct l2cap_conninfo cinfo; | |
1835 | int len, err = 0; | |
2af6b9d5 | 1836 | u32 opt; |
1da177e4 LT |
1837 | |
1838 | BT_DBG("sk %p", sk); | |
1839 | ||
1840 | if (get_user(len, optlen)) | |
1841 | return -EFAULT; | |
1842 | ||
1843 | lock_sock(sk); | |
1844 | ||
1845 | switch (optname) { | |
1846 | case L2CAP_OPTIONS: | |
1847 | opts.imtu = l2cap_pi(sk)->imtu; | |
1848 | opts.omtu = l2cap_pi(sk)->omtu; | |
1849 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
c6b03cf9 | 1850 | opts.mode = l2cap_pi(sk)->mode; |
fcc203c3 | 1851 | opts.fcs = l2cap_pi(sk)->fcs; |
1da177e4 LT |
1852 | |
1853 | len = min_t(unsigned int, len, sizeof(opts)); | |
1854 | if (copy_to_user(optval, (char *) &opts, len)) | |
1855 | err = -EFAULT; | |
1856 | ||
1857 | break; | |
1858 | ||
1859 | case L2CAP_LM: | |
2af6b9d5 MH |
1860 | switch (l2cap_pi(sk)->sec_level) { |
1861 | case BT_SECURITY_LOW: | |
1862 | opt = L2CAP_LM_AUTH; | |
1863 | break; | |
1864 | case BT_SECURITY_MEDIUM: | |
1865 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
1866 | break; | |
1867 | case BT_SECURITY_HIGH: | |
1868 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
1869 | L2CAP_LM_SECURE; | |
1870 | break; | |
1871 | default: | |
1872 | opt = 0; | |
1873 | break; | |
1874 | } | |
1875 | ||
1876 | if (l2cap_pi(sk)->role_switch) | |
1877 | opt |= L2CAP_LM_MASTER; | |
1878 | ||
1879 | if (l2cap_pi(sk)->force_reliable) | |
1880 | opt |= L2CAP_LM_RELIABLE; | |
1881 | ||
1882 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
1883 | err = -EFAULT; |
1884 | break; | |
1885 | ||
1886 | case L2CAP_CONNINFO: | |
f66dc81f MH |
1887 | if (sk->sk_state != BT_CONNECTED && |
1888 | !(sk->sk_state == BT_CONNECT2 && | |
1889 | bt_sk(sk)->defer_setup)) { | |
1da177e4 LT |
1890 | err = -ENOTCONN; |
1891 | break; | |
1892 | } | |
1893 | ||
1894 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
1895 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
1896 | ||
1897 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
1898 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
1899 | err = -EFAULT; | |
1900 | ||
1901 | break; | |
1902 | ||
1903 | default: | |
1904 | err = -ENOPROTOOPT; | |
1905 | break; | |
1906 | } | |
1907 | ||
1908 | release_sock(sk); | |
1909 | return err; | |
1910 | } | |
1911 | ||
d58daf42 MH |
1912 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
1913 | { | |
1914 | struct sock *sk = sock->sk; | |
2af6b9d5 | 1915 | struct bt_security sec; |
d58daf42 MH |
1916 | int len, err = 0; |
1917 | ||
1918 | BT_DBG("sk %p", sk); | |
1919 | ||
1920 | if (level == SOL_L2CAP) | |
1921 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
1922 | ||
0588d94f MH |
1923 | if (level != SOL_BLUETOOTH) |
1924 | return -ENOPROTOOPT; | |
1925 | ||
d58daf42 MH |
1926 | if (get_user(len, optlen)) |
1927 | return -EFAULT; | |
1928 | ||
1929 | lock_sock(sk); | |
1930 | ||
1931 | switch (optname) { | |
2af6b9d5 | 1932 | case BT_SECURITY: |
2526d3d8 | 1933 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
0588d94f MH |
1934 | err = -EINVAL; |
1935 | break; | |
1936 | } | |
1937 | ||
2af6b9d5 MH |
1938 | sec.level = l2cap_pi(sk)->sec_level; |
1939 | ||
1940 | len = min_t(unsigned int, len, sizeof(sec)); | |
1941 | if (copy_to_user(optval, (char *) &sec, len)) | |
1942 | err = -EFAULT; | |
1943 | ||
1944 | break; | |
1945 | ||
f66dc81f MH |
1946 | case BT_DEFER_SETUP: |
1947 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
1948 | err = -EINVAL; | |
1949 | break; | |
1950 | } | |
1951 | ||
1952 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
1953 | err = -EFAULT; | |
1954 | ||
1955 | break; | |
1956 | ||
d58daf42 MH |
1957 | default: |
1958 | err = -ENOPROTOOPT; | |
1959 | break; | |
1960 | } | |
1961 | ||
1962 | release_sock(sk); | |
1963 | return err; | |
1964 | } | |
1965 | ||
1da177e4 LT |
1966 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1967 | { | |
1968 | struct sock *sk = sock->sk; | |
1969 | int err = 0; | |
1970 | ||
1971 | BT_DBG("sock %p, sk %p", sock, sk); | |
1972 | ||
1973 | if (!sk) | |
1974 | return 0; | |
1975 | ||
1976 | lock_sock(sk); | |
1977 | if (!sk->sk_shutdown) { | |
1978 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1979 | l2cap_sock_clear_timer(sk); | |
1980 | __l2cap_sock_close(sk, 0); | |
1981 | ||
1982 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
b1235d79 MH |
1983 | err = bt_sock_wait_state(sk, BT_CLOSED, |
1984 | sk->sk_lingertime); | |
1da177e4 LT |
1985 | } |
1986 | release_sock(sk); | |
1987 | return err; | |
1988 | } | |
1989 | ||
1990 | static int l2cap_sock_release(struct socket *sock) | |
1991 | { | |
1992 | struct sock *sk = sock->sk; | |
1993 | int err; | |
1994 | ||
1995 | BT_DBG("sock %p, sk %p", sock, sk); | |
1996 | ||
1997 | if (!sk) | |
1998 | return 0; | |
1999 | ||
2000 | err = l2cap_sock_shutdown(sock, 2); | |
2001 | ||
2002 | sock_orphan(sk); | |
2003 | l2cap_sock_kill(sk); | |
2004 | return err; | |
2005 | } | |
2006 | ||
1da177e4 LT |
2007 | static void l2cap_chan_ready(struct sock *sk) |
2008 | { | |
2009 | struct sock *parent = bt_sk(sk)->parent; | |
2010 | ||
2011 | BT_DBG("sk %p, parent %p", sk, parent); | |
2012 | ||
2013 | l2cap_pi(sk)->conf_state = 0; | |
2014 | l2cap_sock_clear_timer(sk); | |
2015 | ||
2016 | if (!parent) { | |
2017 | /* Outgoing channel. | |
2018 | * Wake up socket sleeping on connect. | |
2019 | */ | |
2020 | sk->sk_state = BT_CONNECTED; | |
2021 | sk->sk_state_change(sk); | |
2022 | } else { | |
2023 | /* Incoming channel. | |
2024 | * Wake up socket sleeping on accept. | |
2025 | */ | |
2026 | parent->sk_data_ready(parent, 0); | |
2027 | } | |
2028 | } | |
2029 | ||
2030 | /* Copy frame to all raw sockets on that connection */ | |
2031 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) | |
2032 | { | |
2033 | struct l2cap_chan_list *l = &conn->chan_list; | |
2034 | struct sk_buff *nskb; | |
af05b30b | 2035 | struct sock *sk; |
1da177e4 LT |
2036 | |
2037 | BT_DBG("conn %p", conn); | |
2038 | ||
2039 | read_lock(&l->lock); | |
2040 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
2041 | if (sk->sk_type != SOCK_RAW) | |
2042 | continue; | |
2043 | ||
2044 | /* Don't send frame to the socket it came from */ | |
2045 | if (skb->sk == sk) | |
2046 | continue; | |
af05b30b GP |
2047 | nskb = skb_clone(skb, GFP_ATOMIC); |
2048 | if (!nskb) | |
1da177e4 LT |
2049 | continue; |
2050 | ||
2051 | if (sock_queue_rcv_skb(sk, nskb)) | |
2052 | kfree_skb(nskb); | |
2053 | } | |
2054 | read_unlock(&l->lock); | |
2055 | } | |
2056 | ||
2057 | /* ---- L2CAP signalling commands ---- */ | |
2058 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, | |
2059 | u8 code, u8 ident, u16 dlen, void *data) | |
2060 | { | |
2061 | struct sk_buff *skb, **frag; | |
2062 | struct l2cap_cmd_hdr *cmd; | |
2063 | struct l2cap_hdr *lh; | |
2064 | int len, count; | |
2065 | ||
af05b30b GP |
2066 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
2067 | conn, code, ident, dlen); | |
1da177e4 LT |
2068 | |
2069 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; | |
2070 | count = min_t(unsigned int, conn->mtu, len); | |
2071 | ||
2072 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
2073 | if (!skb) | |
2074 | return NULL; | |
2075 | ||
2076 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
aca3192c | 2077 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
8db4dc46 | 2078 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
1da177e4 LT |
2079 | |
2080 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); | |
2081 | cmd->code = code; | |
2082 | cmd->ident = ident; | |
aca3192c | 2083 | cmd->len = cpu_to_le16(dlen); |
1da177e4 LT |
2084 | |
2085 | if (dlen) { | |
2086 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; | |
2087 | memcpy(skb_put(skb, count), data, count); | |
2088 | data += count; | |
2089 | } | |
2090 | ||
2091 | len -= skb->len; | |
2092 | ||
2093 | /* Continuation fragments (no L2CAP header) */ | |
2094 | frag = &skb_shinfo(skb)->frag_list; | |
2095 | while (len) { | |
2096 | count = min_t(unsigned int, conn->mtu, len); | |
2097 | ||
2098 | *frag = bt_skb_alloc(count, GFP_ATOMIC); | |
2099 | if (!*frag) | |
2100 | goto fail; | |
2101 | ||
2102 | memcpy(skb_put(*frag, count), data, count); | |
2103 | ||
2104 | len -= count; | |
2105 | data += count; | |
2106 | ||
2107 | frag = &(*frag)->next; | |
2108 | } | |
2109 | ||
2110 | return skb; | |
2111 | ||
2112 | fail: | |
2113 | kfree_skb(skb); | |
2114 | return NULL; | |
2115 | } | |
2116 | ||
2117 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) | |
2118 | { | |
2119 | struct l2cap_conf_opt *opt = *ptr; | |
2120 | int len; | |
2121 | ||
2122 | len = L2CAP_CONF_OPT_SIZE + opt->len; | |
2123 | *ptr += len; | |
2124 | ||
2125 | *type = opt->type; | |
2126 | *olen = opt->len; | |
2127 | ||
2128 | switch (opt->len) { | |
2129 | case 1: | |
2130 | *val = *((u8 *) opt->val); | |
2131 | break; | |
2132 | ||
2133 | case 2: | |
861d6882 | 2134 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
1da177e4 LT |
2135 | break; |
2136 | ||
2137 | case 4: | |
861d6882 | 2138 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
1da177e4 LT |
2139 | break; |
2140 | ||
2141 | default: | |
2142 | *val = (unsigned long) opt->val; | |
2143 | break; | |
2144 | } | |
2145 | ||
2146 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); | |
2147 | return len; | |
2148 | } | |
2149 | ||
1da177e4 LT |
2150 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
2151 | { | |
2152 | struct l2cap_conf_opt *opt = *ptr; | |
2153 | ||
2154 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); | |
2155 | ||
2156 | opt->type = type; | |
2157 | opt->len = len; | |
2158 | ||
2159 | switch (len) { | |
2160 | case 1: | |
2161 | *((u8 *) opt->val) = val; | |
2162 | break; | |
2163 | ||
2164 | case 2: | |
8e036fc3 | 2165 | *((__le16 *) opt->val) = cpu_to_le16(val); |
1da177e4 LT |
2166 | break; |
2167 | ||
2168 | case 4: | |
8e036fc3 | 2169 | *((__le32 *) opt->val) = cpu_to_le32(val); |
1da177e4 LT |
2170 | break; |
2171 | ||
2172 | default: | |
2173 | memcpy(opt->val, (void *) val, len); | |
2174 | break; | |
2175 | } | |
2176 | ||
2177 | *ptr += L2CAP_CONF_OPT_SIZE + len; | |
2178 | } | |
2179 | ||
0565c1c2 GP |
2180 | static inline void l2cap_ertm_init(struct sock *sk) |
2181 | { | |
2182 | l2cap_pi(sk)->expected_ack_seq = 0; | |
2183 | l2cap_pi(sk)->unacked_frames = 0; | |
2184 | l2cap_pi(sk)->buffer_seq = 0; | |
2185 | l2cap_pi(sk)->num_to_ack = 0; | |
2186 | ||
2187 | setup_timer(&l2cap_pi(sk)->retrans_timer, | |
2188 | l2cap_retrans_timeout, (unsigned long) sk); | |
2189 | setup_timer(&l2cap_pi(sk)->monitor_timer, | |
2190 | l2cap_monitor_timeout, (unsigned long) sk); | |
2191 | ||
2192 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
2193 | } | |
2194 | ||
f2fcfcd6 GP |
2195 | static int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
2196 | { | |
2197 | u32 local_feat_mask = l2cap_feat_mask; | |
2198 | if (enable_ertm) | |
6840ed07 | 2199 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
f2fcfcd6 GP |
2200 | |
2201 | switch (mode) { | |
2202 | case L2CAP_MODE_ERTM: | |
2203 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; | |
2204 | case L2CAP_MODE_STREAMING: | |
2205 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; | |
2206 | default: | |
2207 | return 0x00; | |
2208 | } | |
2209 | } | |
2210 | ||
2211 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) | |
2212 | { | |
2213 | switch (mode) { | |
2214 | case L2CAP_MODE_STREAMING: | |
2215 | case L2CAP_MODE_ERTM: | |
2216 | if (l2cap_mode_supported(mode, remote_feat_mask)) | |
2217 | return mode; | |
2218 | /* fall through */ | |
2219 | default: | |
2220 | return L2CAP_MODE_BASIC; | |
2221 | } | |
2222 | } | |
2223 | ||
1da177e4 LT |
2224 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
2225 | { | |
2226 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2227 | struct l2cap_conf_req *req = data; | |
a0e55a32 | 2228 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
1da177e4 LT |
2229 | void *ptr = req->data; |
2230 | ||
2231 | BT_DBG("sk %p", sk); | |
2232 | ||
f2fcfcd6 GP |
2233 | if (pi->num_conf_req || pi->num_conf_rsp) |
2234 | goto done; | |
2235 | ||
2236 | switch (pi->mode) { | |
2237 | case L2CAP_MODE_STREAMING: | |
2238 | case L2CAP_MODE_ERTM: | |
2239 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; | |
22121fc9 GP |
2240 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) |
2241 | l2cap_send_disconn_req(pi->conn, sk); | |
f2fcfcd6 GP |
2242 | break; |
2243 | default: | |
2244 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2245 | break; | |
2246 | } | |
2247 | ||
2248 | done: | |
65c7c491 MH |
2249 | switch (pi->mode) { |
2250 | case L2CAP_MODE_BASIC: | |
2251 | if (pi->imtu != L2CAP_DEFAULT_MTU) | |
2252 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); | |
2253 | break; | |
2254 | ||
2255 | case L2CAP_MODE_ERTM: | |
2256 | rfc.mode = L2CAP_MODE_ERTM; | |
f2fcfcd6 | 2257 | rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW; |
5fbcd3d1 | 2258 | rfc.max_transmit = max_transmit; |
f2fcfcd6 GP |
2259 | rfc.retrans_timeout = 0; |
2260 | rfc.monitor_timeout = 0; | |
c74e560c | 2261 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
f2fcfcd6 GP |
2262 | |
2263 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2264 | sizeof(rfc), (unsigned long) &rfc); | |
fcc203c3 GP |
2265 | |
2266 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) | |
2267 | break; | |
2268 | ||
2269 | if (pi->fcs == L2CAP_FCS_NONE || | |
2270 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2271 | pi->fcs = L2CAP_FCS_NONE; | |
2272 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2273 | } | |
f2fcfcd6 GP |
2274 | break; |
2275 | ||
2276 | case L2CAP_MODE_STREAMING: | |
2277 | rfc.mode = L2CAP_MODE_STREAMING; | |
2278 | rfc.txwin_size = 0; | |
2279 | rfc.max_transmit = 0; | |
2280 | rfc.retrans_timeout = 0; | |
2281 | rfc.monitor_timeout = 0; | |
c74e560c | 2282 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
65c7c491 MH |
2283 | |
2284 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2285 | sizeof(rfc), (unsigned long) &rfc); | |
fcc203c3 GP |
2286 | |
2287 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) | |
2288 | break; | |
2289 | ||
2290 | if (pi->fcs == L2CAP_FCS_NONE || | |
2291 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { | |
2292 | pi->fcs = L2CAP_FCS_NONE; | |
2293 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); | |
2294 | } | |
65c7c491 MH |
2295 | break; |
2296 | } | |
1da177e4 LT |
2297 | |
2298 | /* FIXME: Need actual value of the flush timeout */ | |
2299 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) | |
2300 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); | |
2301 | ||
aca3192c YH |
2302 | req->dcid = cpu_to_le16(pi->dcid); |
2303 | req->flags = cpu_to_le16(0); | |
1da177e4 LT |
2304 | |
2305 | return ptr - data; | |
2306 | } | |
2307 | ||
5dee9e7c | 2308 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
1da177e4 LT |
2309 | { |
2310 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
5dee9e7c MH |
2311 | struct l2cap_conf_rsp *rsp = data; |
2312 | void *ptr = rsp->data; | |
2313 | void *req = pi->conf_req; | |
2314 | int len = pi->conf_len; | |
2315 | int type, hint, olen; | |
2316 | unsigned long val; | |
6464f35f | 2317 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
861d6882 | 2318 | u16 mtu = L2CAP_DEFAULT_MTU; |
5dee9e7c | 2319 | u16 result = L2CAP_CONF_SUCCESS; |
1da177e4 | 2320 | |
5dee9e7c | 2321 | BT_DBG("sk %p", sk); |
820ae1b8 | 2322 | |
5dee9e7c MH |
2323 | while (len >= L2CAP_CONF_OPT_SIZE) { |
2324 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); | |
1da177e4 | 2325 | |
589d2746 | 2326 | hint = type & L2CAP_CONF_HINT; |
47ec1dcd | 2327 | type &= L2CAP_CONF_MASK; |
5dee9e7c MH |
2328 | |
2329 | switch (type) { | |
2330 | case L2CAP_CONF_MTU: | |
861d6882 | 2331 | mtu = val; |
5dee9e7c MH |
2332 | break; |
2333 | ||
2334 | case L2CAP_CONF_FLUSH_TO: | |
2335 | pi->flush_to = val; | |
2336 | break; | |
2337 | ||
2338 | case L2CAP_CONF_QOS: | |
2339 | break; | |
2340 | ||
6464f35f MH |
2341 | case L2CAP_CONF_RFC: |
2342 | if (olen == sizeof(rfc)) | |
2343 | memcpy(&rfc, (void *) val, olen); | |
2344 | break; | |
2345 | ||
fcc203c3 GP |
2346 | case L2CAP_CONF_FCS: |
2347 | if (val == L2CAP_FCS_NONE) | |
2348 | pi->conf_state |= L2CAP_CONF_NO_FCS_RECV; | |
2349 | ||
2350 | break; | |
2351 | ||
5dee9e7c MH |
2352 | default: |
2353 | if (hint) | |
2354 | break; | |
2355 | ||
2356 | result = L2CAP_CONF_UNKNOWN; | |
2357 | *((u8 *) ptr++) = type; | |
2358 | break; | |
2359 | } | |
2360 | } | |
2361 | ||
f2fcfcd6 GP |
2362 | if (pi->num_conf_rsp || pi->num_conf_req) |
2363 | goto done; | |
2364 | ||
2365 | switch (pi->mode) { | |
2366 | case L2CAP_MODE_STREAMING: | |
2367 | case L2CAP_MODE_ERTM: | |
2368 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; | |
2369 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) | |
2370 | return -ECONNREFUSED; | |
2371 | break; | |
2372 | default: | |
2373 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); | |
2374 | break; | |
2375 | } | |
2376 | ||
2377 | done: | |
2378 | if (pi->mode != rfc.mode) { | |
2379 | result = L2CAP_CONF_UNACCEPT; | |
2380 | rfc.mode = pi->mode; | |
2381 | ||
2382 | if (pi->num_conf_rsp == 1) | |
2383 | return -ECONNREFUSED; | |
2384 | ||
2385 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2386 | sizeof(rfc), (unsigned long) &rfc); | |
2387 | } | |
2388 | ||
2389 | ||
5dee9e7c MH |
2390 | if (result == L2CAP_CONF_SUCCESS) { |
2391 | /* Configure output options and let the other side know | |
2392 | * which ones we don't like. */ | |
2393 | ||
f2fcfcd6 GP |
2394 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
2395 | result = L2CAP_CONF_UNACCEPT; | |
2396 | else { | |
2397 | pi->omtu = mtu; | |
2398 | pi->conf_state |= L2CAP_CONF_MTU_DONE; | |
2399 | } | |
2400 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
6464f35f | 2401 | |
f2fcfcd6 GP |
2402 | switch (rfc.mode) { |
2403 | case L2CAP_MODE_BASIC: | |
2404 | pi->fcs = L2CAP_FCS_NONE; | |
2405 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
2406 | break; | |
2407 | ||
2408 | case L2CAP_MODE_ERTM: | |
2409 | pi->remote_tx_win = rfc.txwin_size; | |
2410 | pi->remote_max_tx = rfc.max_transmit; | |
2411 | pi->max_pdu_size = rfc.max_pdu_size; | |
2412 | ||
2413 | rfc.retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; | |
2414 | rfc.monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; | |
2415 | ||
2416 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2417 | |
2418 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2419 | sizeof(rfc), (unsigned long) &rfc); | |
2420 | ||
f2fcfcd6 GP |
2421 | break; |
2422 | ||
2423 | case L2CAP_MODE_STREAMING: | |
2424 | pi->remote_tx_win = rfc.txwin_size; | |
2425 | pi->max_pdu_size = rfc.max_pdu_size; | |
2426 | ||
2427 | pi->conf_state |= L2CAP_CONF_MODE_DONE; | |
68ae6639 GP |
2428 | |
2429 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2430 | sizeof(rfc), (unsigned long) &rfc); | |
2431 | ||
f2fcfcd6 GP |
2432 | break; |
2433 | ||
2434 | default: | |
5dee9e7c | 2435 | result = L2CAP_CONF_UNACCEPT; |
5dee9e7c | 2436 | |
6464f35f | 2437 | memset(&rfc, 0, sizeof(rfc)); |
f2fcfcd6 GP |
2438 | rfc.mode = pi->mode; |
2439 | } | |
6464f35f | 2440 | |
f2fcfcd6 GP |
2441 | if (result == L2CAP_CONF_SUCCESS) |
2442 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; | |
2443 | } | |
5dee9e7c MH |
2444 | rsp->scid = cpu_to_le16(pi->dcid); |
2445 | rsp->result = cpu_to_le16(result); | |
2446 | rsp->flags = cpu_to_le16(0x0000); | |
2447 | ||
2448 | return ptr - data; | |
1da177e4 LT |
2449 | } |
2450 | ||
f2fcfcd6 GP |
2451 | static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result) |
2452 | { | |
2453 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
2454 | struct l2cap_conf_req *req = data; | |
2455 | void *ptr = req->data; | |
2456 | int type, olen; | |
2457 | unsigned long val; | |
2458 | struct l2cap_conf_rfc rfc; | |
2459 | ||
2460 | BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data); | |
2461 | ||
2462 | while (len >= L2CAP_CONF_OPT_SIZE) { | |
2463 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); | |
2464 | ||
2465 | switch (type) { | |
2466 | case L2CAP_CONF_MTU: | |
2467 | if (val < L2CAP_DEFAULT_MIN_MTU) { | |
2468 | *result = L2CAP_CONF_UNACCEPT; | |
2469 | pi->omtu = L2CAP_DEFAULT_MIN_MTU; | |
2470 | } else | |
2471 | pi->omtu = val; | |
2472 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); | |
2473 | break; | |
2474 | ||
2475 | case L2CAP_CONF_FLUSH_TO: | |
2476 | pi->flush_to = val; | |
2477 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, | |
2478 | 2, pi->flush_to); | |
2479 | break; | |
2480 | ||
2481 | case L2CAP_CONF_RFC: | |
2482 | if (olen == sizeof(rfc)) | |
2483 | memcpy(&rfc, (void *)val, olen); | |
2484 | ||
2485 | if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) && | |
2486 | rfc.mode != pi->mode) | |
2487 | return -ECONNREFUSED; | |
2488 | ||
2489 | pi->mode = rfc.mode; | |
2490 | pi->fcs = 0; | |
2491 | ||
2492 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, | |
2493 | sizeof(rfc), (unsigned long) &rfc); | |
2494 | break; | |
2495 | } | |
2496 | } | |
2497 | ||
2498 | if (*result == L2CAP_CONF_SUCCESS) { | |
2499 | switch (rfc.mode) { | |
2500 | case L2CAP_MODE_ERTM: | |
2501 | pi->remote_tx_win = rfc.txwin_size; | |
2502 | pi->retrans_timeout = rfc.retrans_timeout; | |
2503 | pi->monitor_timeout = rfc.monitor_timeout; | |
2504 | pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size); | |
2505 | break; | |
2506 | case L2CAP_MODE_STREAMING: | |
2507 | pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size); | |
2508 | break; | |
2509 | } | |
2510 | } | |
2511 | ||
2512 | req->dcid = cpu_to_le16(pi->dcid); | |
2513 | req->flags = cpu_to_le16(0x0000); | |
2514 | ||
2515 | return ptr - data; | |
2516 | } | |
2517 | ||
5dee9e7c | 2518 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
1da177e4 LT |
2519 | { |
2520 | struct l2cap_conf_rsp *rsp = data; | |
2521 | void *ptr = rsp->data; | |
1da177e4 | 2522 | |
5dee9e7c | 2523 | BT_DBG("sk %p", sk); |
1da177e4 | 2524 | |
aca3192c | 2525 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
5dee9e7c | 2526 | rsp->result = cpu_to_le16(result); |
aca3192c | 2527 | rsp->flags = cpu_to_le16(flags); |
1da177e4 LT |
2528 | |
2529 | return ptr - data; | |
2530 | } | |
2531 | ||
4e8402a3 MH |
2532 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2533 | { | |
2534 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; | |
2535 | ||
2536 | if (rej->reason != 0x0000) | |
2537 | return 0; | |
2538 | ||
2539 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && | |
2540 | cmd->ident == conn->info_ident) { | |
4e8402a3 | 2541 | del_timer(&conn->info_timer); |
984947dc MH |
2542 | |
2543 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
e1027a7c | 2544 | conn->info_ident = 0; |
984947dc | 2545 | |
4e8402a3 MH |
2546 | l2cap_conn_start(conn); |
2547 | } | |
2548 | ||
2549 | return 0; | |
2550 | } | |
2551 | ||
1da177e4 LT |
2552 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
2553 | { | |
2554 | struct l2cap_chan_list *list = &conn->chan_list; | |
2555 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; | |
2556 | struct l2cap_conn_rsp rsp; | |
2557 | struct sock *sk, *parent; | |
e7c29cb1 | 2558 | int result, status = L2CAP_CS_NO_INFO; |
1da177e4 LT |
2559 | |
2560 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); | |
e7c29cb1 | 2561 | __le16 psm = req->psm; |
1da177e4 LT |
2562 | |
2563 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); | |
2564 | ||
2565 | /* Check if we have socket listening on psm */ | |
2566 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); | |
2567 | if (!parent) { | |
2568 | result = L2CAP_CR_BAD_PSM; | |
2569 | goto sendresp; | |
2570 | } | |
2571 | ||
e7c29cb1 MH |
2572 | /* Check if the ACL is secure enough (if not SDP) */ |
2573 | if (psm != cpu_to_le16(0x0001) && | |
2574 | !hci_conn_check_link_mode(conn->hcon)) { | |
2950f21a | 2575 | conn->disc_reason = 0x05; |
e7c29cb1 MH |
2576 | result = L2CAP_CR_SEC_BLOCK; |
2577 | goto response; | |
2578 | } | |
2579 | ||
1da177e4 LT |
2580 | result = L2CAP_CR_NO_MEM; |
2581 | ||
2582 | /* Check for backlog size */ | |
2583 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 2584 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
2585 | goto response; |
2586 | } | |
2587 | ||
3b1e0a65 | 2588 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
1da177e4 LT |
2589 | if (!sk) |
2590 | goto response; | |
2591 | ||
fd1278d7 | 2592 | write_lock_bh(&list->lock); |
1da177e4 LT |
2593 | |
2594 | /* Check if we already have channel with that dcid */ | |
2595 | if (__l2cap_get_chan_by_dcid(list, scid)) { | |
fd1278d7 | 2596 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2597 | sock_set_flag(sk, SOCK_ZAPPED); |
2598 | l2cap_sock_kill(sk); | |
2599 | goto response; | |
2600 | } | |
2601 | ||
2602 | hci_conn_hold(conn->hcon); | |
2603 | ||
2604 | l2cap_sock_init(sk, parent); | |
2605 | bacpy(&bt_sk(sk)->src, conn->src); | |
2606 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
2607 | l2cap_pi(sk)->psm = psm; | |
2608 | l2cap_pi(sk)->dcid = scid; | |
2609 | ||
2610 | __l2cap_chan_add(conn, sk, parent); | |
2611 | dcid = l2cap_pi(sk)->scid; | |
2612 | ||
2613 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); | |
2614 | ||
1da177e4 LT |
2615 | l2cap_pi(sk)->ident = cmd->ident; |
2616 | ||
984947dc | 2617 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
2af6b9d5 | 2618 | if (l2cap_check_security(sk)) { |
f66dc81f MH |
2619 | if (bt_sk(sk)->defer_setup) { |
2620 | sk->sk_state = BT_CONNECT2; | |
2621 | result = L2CAP_CR_PEND; | |
2622 | status = L2CAP_CS_AUTHOR_PEND; | |
2623 | parent->sk_data_ready(parent, 0); | |
2624 | } else { | |
2625 | sk->sk_state = BT_CONFIG; | |
2626 | result = L2CAP_CR_SUCCESS; | |
2627 | status = L2CAP_CS_NO_INFO; | |
2628 | } | |
79d554a6 MH |
2629 | } else { |
2630 | sk->sk_state = BT_CONNECT2; | |
2631 | result = L2CAP_CR_PEND; | |
2632 | status = L2CAP_CS_AUTHEN_PEND; | |
2633 | } | |
2634 | } else { | |
2635 | sk->sk_state = BT_CONNECT2; | |
2636 | result = L2CAP_CR_PEND; | |
2637 | status = L2CAP_CS_NO_INFO; | |
1da177e4 LT |
2638 | } |
2639 | ||
fd1278d7 | 2640 | write_unlock_bh(&list->lock); |
1da177e4 LT |
2641 | |
2642 | response: | |
2643 | bh_unlock_sock(parent); | |
2644 | ||
2645 | sendresp: | |
aca3192c YH |
2646 | rsp.scid = cpu_to_le16(scid); |
2647 | rsp.dcid = cpu_to_le16(dcid); | |
2648 | rsp.result = cpu_to_le16(result); | |
2649 | rsp.status = cpu_to_le16(status); | |
1da177e4 | 2650 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
79d554a6 MH |
2651 | |
2652 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { | |
2653 | struct l2cap_info_req info; | |
2654 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2655 | ||
2656 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; | |
2657 | conn->info_ident = l2cap_get_ident(conn); | |
2658 | ||
2659 | mod_timer(&conn->info_timer, jiffies + | |
2660 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); | |
2661 | ||
2662 | l2cap_send_cmd(conn, conn->info_ident, | |
2663 | L2CAP_INFO_REQ, sizeof(info), &info); | |
2664 | } | |
2665 | ||
1da177e4 LT |
2666 | return 0; |
2667 | } | |
2668 | ||
2669 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2670 | { | |
2671 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; | |
2672 | u16 scid, dcid, result, status; | |
2673 | struct sock *sk; | |
2674 | u8 req[128]; | |
2675 | ||
2676 | scid = __le16_to_cpu(rsp->scid); | |
2677 | dcid = __le16_to_cpu(rsp->dcid); | |
2678 | result = __le16_to_cpu(rsp->result); | |
2679 | status = __le16_to_cpu(rsp->status); | |
2680 | ||
2681 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); | |
2682 | ||
2683 | if (scid) { | |
af05b30b GP |
2684 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2685 | if (!sk) | |
1da177e4 LT |
2686 | return 0; |
2687 | } else { | |
af05b30b GP |
2688 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
2689 | if (!sk) | |
1da177e4 LT |
2690 | return 0; |
2691 | } | |
2692 | ||
2693 | switch (result) { | |
2694 | case L2CAP_CR_SUCCESS: | |
2695 | sk->sk_state = BT_CONFIG; | |
2696 | l2cap_pi(sk)->ident = 0; | |
2697 | l2cap_pi(sk)->dcid = dcid; | |
2698 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
2699 | ||
6a8d3010 MH |
2700 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
2701 | ||
1da177e4 LT |
2702 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
2703 | l2cap_build_conf_req(sk, req), req); | |
f2fcfcd6 | 2704 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
2705 | break; |
2706 | ||
2707 | case L2CAP_CR_PEND: | |
6a8d3010 | 2708 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
1da177e4 LT |
2709 | break; |
2710 | ||
2711 | default: | |
2712 | l2cap_chan_del(sk, ECONNREFUSED); | |
2713 | break; | |
2714 | } | |
2715 | ||
2716 | bh_unlock_sock(sk); | |
2717 | return 0; | |
2718 | } | |
2719 | ||
88219a0f | 2720 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
1da177e4 LT |
2721 | { |
2722 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; | |
2723 | u16 dcid, flags; | |
2724 | u8 rsp[64]; | |
2725 | struct sock *sk; | |
5dee9e7c | 2726 | int len; |
1da177e4 LT |
2727 | |
2728 | dcid = __le16_to_cpu(req->dcid); | |
2729 | flags = __le16_to_cpu(req->flags); | |
2730 | ||
2731 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); | |
2732 | ||
af05b30b GP |
2733 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
2734 | if (!sk) | |
1da177e4 LT |
2735 | return -ENOENT; |
2736 | ||
354f60a9 MH |
2737 | if (sk->sk_state == BT_DISCONN) |
2738 | goto unlock; | |
2739 | ||
5dee9e7c | 2740 | /* Reject if config buffer is too small. */ |
88219a0f | 2741 | len = cmd_len - sizeof(*req); |
5dee9e7c MH |
2742 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
2743 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
2744 | l2cap_build_conf_rsp(sk, rsp, | |
2745 | L2CAP_CONF_REJECT, flags), rsp); | |
2746 | goto unlock; | |
2747 | } | |
2748 | ||
2749 | /* Store config. */ | |
2750 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); | |
2751 | l2cap_pi(sk)->conf_len += len; | |
1da177e4 LT |
2752 | |
2753 | if (flags & 0x0001) { | |
2754 | /* Incomplete config. Send empty response. */ | |
2755 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, | |
5dee9e7c MH |
2756 | l2cap_build_conf_rsp(sk, rsp, |
2757 | L2CAP_CONF_SUCCESS, 0x0001), rsp); | |
1da177e4 LT |
2758 | goto unlock; |
2759 | } | |
2760 | ||
2761 | /* Complete config. */ | |
5dee9e7c | 2762 | len = l2cap_parse_conf_req(sk, rsp); |
f2fcfcd6 | 2763 | if (len < 0) { |
22121fc9 | 2764 | l2cap_send_disconn_req(conn, sk); |
1da177e4 | 2765 | goto unlock; |
f2fcfcd6 | 2766 | } |
1da177e4 | 2767 | |
5dee9e7c | 2768 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
f2fcfcd6 | 2769 | l2cap_pi(sk)->num_conf_rsp++; |
5dee9e7c | 2770 | |
5dee9e7c MH |
2771 | /* Reset config buffer. */ |
2772 | l2cap_pi(sk)->conf_len = 0; | |
2773 | ||
876d9484 MH |
2774 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
2775 | goto unlock; | |
2776 | ||
1da177e4 | 2777 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
f64f9e71 JP |
2778 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
2779 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
fcc203c3 GP |
2780 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
2781 | ||
1da177e4 | 2782 | sk->sk_state = BT_CONNECTED; |
e90bac06 | 2783 | |
0565c1c2 GP |
2784 | l2cap_pi(sk)->next_tx_seq = 0; |
2785 | l2cap_pi(sk)->expected_tx_seq = 0; | |
1c2acffb | 2786 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
2787 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
2788 | l2cap_ertm_init(sk); | |
2789 | ||
1da177e4 | 2790 | l2cap_chan_ready(sk); |
876d9484 MH |
2791 | goto unlock; |
2792 | } | |
2793 | ||
2794 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { | |
79d554a6 | 2795 | u8 buf[64]; |
1da177e4 | 2796 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
79d554a6 | 2797 | l2cap_build_conf_req(sk, buf), buf); |
f2fcfcd6 | 2798 | l2cap_pi(sk)->num_conf_req++; |
1da177e4 LT |
2799 | } |
2800 | ||
2801 | unlock: | |
2802 | bh_unlock_sock(sk); | |
2803 | return 0; | |
2804 | } | |
2805 | ||
2806 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2807 | { | |
2808 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; | |
2809 | u16 scid, flags, result; | |
2810 | struct sock *sk; | |
2811 | ||
2812 | scid = __le16_to_cpu(rsp->scid); | |
2813 | flags = __le16_to_cpu(rsp->flags); | |
2814 | result = __le16_to_cpu(rsp->result); | |
2815 | ||
af05b30b GP |
2816 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
2817 | scid, flags, result); | |
1da177e4 | 2818 | |
af05b30b GP |
2819 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2820 | if (!sk) | |
1da177e4 LT |
2821 | return 0; |
2822 | ||
2823 | switch (result) { | |
2824 | case L2CAP_CONF_SUCCESS: | |
2825 | break; | |
2826 | ||
2827 | case L2CAP_CONF_UNACCEPT: | |
f2fcfcd6 GP |
2828 | if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
2829 | int len = cmd->len - sizeof(*rsp); | |
2830 | char req[64]; | |
2831 | ||
2832 | /* throw out any old stored conf requests */ | |
2833 | result = L2CAP_CONF_SUCCESS; | |
2834 | len = l2cap_parse_conf_rsp(sk, rsp->data, | |
2835 | len, req, &result); | |
2836 | if (len < 0) { | |
22121fc9 | 2837 | l2cap_send_disconn_req(conn, sk); |
f2fcfcd6 GP |
2838 | goto done; |
2839 | } | |
2840 | ||
2841 | l2cap_send_cmd(conn, l2cap_get_ident(conn), | |
2842 | L2CAP_CONF_REQ, len, req); | |
2843 | l2cap_pi(sk)->num_conf_req++; | |
2844 | if (result != L2CAP_CONF_SUCCESS) | |
2845 | goto done; | |
2846 | break; | |
1da177e4 LT |
2847 | } |
2848 | ||
8e87d142 | 2849 | default: |
1da177e4 | 2850 | sk->sk_state = BT_DISCONN; |
b1235d79 | 2851 | sk->sk_err = ECONNRESET; |
1da177e4 | 2852 | l2cap_sock_set_timer(sk, HZ * 5); |
22121fc9 | 2853 | l2cap_send_disconn_req(conn, sk); |
1da177e4 LT |
2854 | goto done; |
2855 | } | |
2856 | ||
2857 | if (flags & 0x01) | |
2858 | goto done; | |
2859 | ||
1da177e4 LT |
2860 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
2861 | ||
2862 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { | |
f64f9e71 JP |
2863 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
2864 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) | |
fcc203c3 GP |
2865 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
2866 | ||
1da177e4 | 2867 | sk->sk_state = BT_CONNECTED; |
0565c1c2 | 2868 | l2cap_pi(sk)->next_tx_seq = 0; |
1c2acffb | 2869 | l2cap_pi(sk)->expected_tx_seq = 0; |
1c2acffb | 2870 | __skb_queue_head_init(TX_QUEUE(sk)); |
0565c1c2 GP |
2871 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
2872 | l2cap_ertm_init(sk); | |
2873 | ||
1da177e4 LT |
2874 | l2cap_chan_ready(sk); |
2875 | } | |
2876 | ||
2877 | done: | |
2878 | bh_unlock_sock(sk); | |
2879 | return 0; | |
2880 | } | |
2881 | ||
2882 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2883 | { | |
2884 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; | |
2885 | struct l2cap_disconn_rsp rsp; | |
2886 | u16 dcid, scid; | |
2887 | struct sock *sk; | |
2888 | ||
2889 | scid = __le16_to_cpu(req->scid); | |
2890 | dcid = __le16_to_cpu(req->dcid); | |
2891 | ||
2892 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); | |
2893 | ||
af05b30b GP |
2894 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
2895 | if (!sk) | |
1da177e4 LT |
2896 | return 0; |
2897 | ||
aca3192c YH |
2898 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
2899 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
1da177e4 LT |
2900 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
2901 | ||
2902 | sk->sk_shutdown = SHUTDOWN_MASK; | |
2903 | ||
1c2acffb | 2904 | skb_queue_purge(TX_QUEUE(sk)); |
0565c1c2 GP |
2905 | |
2906 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
2907 | skb_queue_purge(SREJ_QUEUE(sk)); | |
2908 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
2909 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
2910 | } | |
1c2acffb | 2911 | |
1da177e4 LT |
2912 | l2cap_chan_del(sk, ECONNRESET); |
2913 | bh_unlock_sock(sk); | |
2914 | ||
2915 | l2cap_sock_kill(sk); | |
2916 | return 0; | |
2917 | } | |
2918 | ||
2919 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2920 | { | |
2921 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; | |
2922 | u16 dcid, scid; | |
2923 | struct sock *sk; | |
2924 | ||
2925 | scid = __le16_to_cpu(rsp->scid); | |
2926 | dcid = __le16_to_cpu(rsp->dcid); | |
2927 | ||
2928 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); | |
2929 | ||
af05b30b GP |
2930 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
2931 | if (!sk) | |
1da177e4 LT |
2932 | return 0; |
2933 | ||
1c2acffb | 2934 | skb_queue_purge(TX_QUEUE(sk)); |
0565c1c2 GP |
2935 | |
2936 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { | |
2937 | skb_queue_purge(SREJ_QUEUE(sk)); | |
2938 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
2939 | del_timer(&l2cap_pi(sk)->monitor_timer); | |
2940 | } | |
1c2acffb | 2941 | |
1da177e4 LT |
2942 | l2cap_chan_del(sk, 0); |
2943 | bh_unlock_sock(sk); | |
2944 | ||
2945 | l2cap_sock_kill(sk); | |
2946 | return 0; | |
2947 | } | |
2948 | ||
2949 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2950 | { | |
2951 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; | |
1da177e4 LT |
2952 | u16 type; |
2953 | ||
2954 | type = __le16_to_cpu(req->type); | |
2955 | ||
2956 | BT_DBG("type 0x%4.4x", type); | |
2957 | ||
f0709e03 MH |
2958 | if (type == L2CAP_IT_FEAT_MASK) { |
2959 | u8 buf[8]; | |
44dd46de | 2960 | u32 feat_mask = l2cap_feat_mask; |
f0709e03 MH |
2961 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
2962 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); | |
2963 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
44dd46de | 2964 | if (enable_ertm) |
fcc203c3 GP |
2965 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
2966 | | L2CAP_FEAT_FCS; | |
1b7bf4ed | 2967 | put_unaligned_le32(feat_mask, rsp->data); |
f0709e03 MH |
2968 | l2cap_send_cmd(conn, cmd->ident, |
2969 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
e1027a7c MH |
2970 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
2971 | u8 buf[12]; | |
2972 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; | |
2973 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
2974 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); | |
2975 | memcpy(buf + 4, l2cap_fixed_chan, 8); | |
2976 | l2cap_send_cmd(conn, cmd->ident, | |
2977 | L2CAP_INFO_RSP, sizeof(buf), buf); | |
f0709e03 MH |
2978 | } else { |
2979 | struct l2cap_info_rsp rsp; | |
2980 | rsp.type = cpu_to_le16(type); | |
2981 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); | |
2982 | l2cap_send_cmd(conn, cmd->ident, | |
2983 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); | |
2984 | } | |
1da177e4 LT |
2985 | |
2986 | return 0; | |
2987 | } | |
2988 | ||
2989 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) | |
2990 | { | |
2991 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; | |
2992 | u16 type, result; | |
2993 | ||
2994 | type = __le16_to_cpu(rsp->type); | |
2995 | result = __le16_to_cpu(rsp->result); | |
2996 | ||
2997 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); | |
2998 | ||
4e8402a3 MH |
2999 | del_timer(&conn->info_timer); |
3000 | ||
984947dc | 3001 | if (type == L2CAP_IT_FEAT_MASK) { |
83985319 | 3002 | conn->feat_mask = get_unaligned_le32(rsp->data); |
4e8402a3 | 3003 | |
47ec1dcd | 3004 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
e1027a7c MH |
3005 | struct l2cap_info_req req; |
3006 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); | |
3007 | ||
3008 | conn->info_ident = l2cap_get_ident(conn); | |
3009 | ||
3010 | l2cap_send_cmd(conn, conn->info_ident, | |
3011 | L2CAP_INFO_REQ, sizeof(req), &req); | |
3012 | } else { | |
3013 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; | |
3014 | conn->info_ident = 0; | |
3015 | ||
3016 | l2cap_conn_start(conn); | |
3017 | } | |
3018 | } else if (type == L2CAP_IT_FIXED_CHAN) { | |
984947dc | 3019 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
e1027a7c | 3020 | conn->info_ident = 0; |
984947dc MH |
3021 | |
3022 | l2cap_conn_start(conn); | |
3023 | } | |
4e8402a3 | 3024 | |
1da177e4 LT |
3025 | return 0; |
3026 | } | |
3027 | ||
3028 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
3029 | { | |
3030 | u8 *data = skb->data; | |
3031 | int len = skb->len; | |
3032 | struct l2cap_cmd_hdr cmd; | |
3033 | int err = 0; | |
3034 | ||
3035 | l2cap_raw_recv(conn, skb); | |
3036 | ||
3037 | while (len >= L2CAP_CMD_HDR_SIZE) { | |
88219a0f | 3038 | u16 cmd_len; |
1da177e4 LT |
3039 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
3040 | data += L2CAP_CMD_HDR_SIZE; | |
3041 | len -= L2CAP_CMD_HDR_SIZE; | |
3042 | ||
88219a0f | 3043 | cmd_len = le16_to_cpu(cmd.len); |
1da177e4 | 3044 | |
88219a0f | 3045 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
1da177e4 | 3046 | |
88219a0f | 3047 | if (cmd_len > len || !cmd.ident) { |
1da177e4 LT |
3048 | BT_DBG("corrupted command"); |
3049 | break; | |
3050 | } | |
3051 | ||
3052 | switch (cmd.code) { | |
3053 | case L2CAP_COMMAND_REJ: | |
4e8402a3 | 3054 | l2cap_command_rej(conn, &cmd, data); |
1da177e4 LT |
3055 | break; |
3056 | ||
3057 | case L2CAP_CONN_REQ: | |
3058 | err = l2cap_connect_req(conn, &cmd, data); | |
3059 | break; | |
3060 | ||
3061 | case L2CAP_CONN_RSP: | |
3062 | err = l2cap_connect_rsp(conn, &cmd, data); | |
3063 | break; | |
3064 | ||
3065 | case L2CAP_CONF_REQ: | |
88219a0f | 3066 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
1da177e4 LT |
3067 | break; |
3068 | ||
3069 | case L2CAP_CONF_RSP: | |
3070 | err = l2cap_config_rsp(conn, &cmd, data); | |
3071 | break; | |
3072 | ||
3073 | case L2CAP_DISCONN_REQ: | |
3074 | err = l2cap_disconnect_req(conn, &cmd, data); | |
3075 | break; | |
3076 | ||
3077 | case L2CAP_DISCONN_RSP: | |
3078 | err = l2cap_disconnect_rsp(conn, &cmd, data); | |
3079 | break; | |
3080 | ||
3081 | case L2CAP_ECHO_REQ: | |
88219a0f | 3082 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
1da177e4 LT |
3083 | break; |
3084 | ||
3085 | case L2CAP_ECHO_RSP: | |
3086 | break; | |
3087 | ||
3088 | case L2CAP_INFO_REQ: | |
3089 | err = l2cap_information_req(conn, &cmd, data); | |
3090 | break; | |
3091 | ||
3092 | case L2CAP_INFO_RSP: | |
3093 | err = l2cap_information_rsp(conn, &cmd, data); | |
3094 | break; | |
3095 | ||
3096 | default: | |
3097 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); | |
3098 | err = -EINVAL; | |
3099 | break; | |
3100 | } | |
3101 | ||
3102 | if (err) { | |
3103 | struct l2cap_cmd_rej rej; | |
3104 | BT_DBG("error %d", err); | |
3105 | ||
3106 | /* FIXME: Map err to a valid reason */ | |
aca3192c | 3107 | rej.reason = cpu_to_le16(0); |
1da177e4 LT |
3108 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
3109 | } | |
3110 | ||
88219a0f AV |
3111 | data += cmd_len; |
3112 | len -= cmd_len; | |
1da177e4 LT |
3113 | } |
3114 | ||
3115 | kfree_skb(skb); | |
3116 | } | |
3117 | ||
fcc203c3 GP |
3118 | static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb) |
3119 | { | |
3120 | u16 our_fcs, rcv_fcs; | |
3121 | int hdr_size = L2CAP_HDR_SIZE + 2; | |
3122 | ||
3123 | if (pi->fcs == L2CAP_FCS_CRC16) { | |
3124 | skb_trim(skb, skb->len - 2); | |
3125 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); | |
3126 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); | |
3127 | ||
3128 | if (our_fcs != rcv_fcs) | |
3129 | return -EINVAL; | |
3130 | } | |
3131 | return 0; | |
3132 | } | |
3133 | ||
8f17154f GP |
3134 | static void l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar) |
3135 | { | |
3136 | struct sk_buff *next_skb; | |
3137 | ||
3138 | bt_cb(skb)->tx_seq = tx_seq; | |
3139 | bt_cb(skb)->sar = sar; | |
3140 | ||
3141 | next_skb = skb_peek(SREJ_QUEUE(sk)); | |
3142 | if (!next_skb) { | |
3143 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
3144 | return; | |
3145 | } | |
3146 | ||
3147 | do { | |
3148 | if (bt_cb(next_skb)->tx_seq > tx_seq) { | |
3149 | __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb); | |
3150 | return; | |
3151 | } | |
3152 | ||
3153 | if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb)) | |
3154 | break; | |
3155 | ||
3156 | } while((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb))); | |
3157 | ||
3158 | __skb_queue_tail(SREJ_QUEUE(sk), skb); | |
3159 | } | |
3160 | ||
c74e560c GP |
3161 | static int l2cap_sar_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
3162 | { | |
3163 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3164 | struct sk_buff *_skb; | |
3165 | int err = -EINVAL; | |
3166 | ||
3167 | switch (control & L2CAP_CTRL_SAR) { | |
3168 | case L2CAP_SDU_UNSEGMENTED: | |
3169 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3170 | kfree_skb(pi->sdu); | |
3171 | break; | |
3172 | } | |
3173 | ||
3174 | err = sock_queue_rcv_skb(sk, skb); | |
3175 | if (!err) | |
3176 | return 0; | |
3177 | ||
3178 | break; | |
3179 | ||
3180 | case L2CAP_SDU_START: | |
3181 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { | |
3182 | kfree_skb(pi->sdu); | |
3183 | break; | |
3184 | } | |
3185 | ||
3186 | pi->sdu_len = get_unaligned_le16(skb->data); | |
3187 | skb_pull(skb, 2); | |
3188 | ||
3189 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); | |
3190 | if (!pi->sdu) { | |
3191 | err = -ENOMEM; | |
3192 | break; | |
3193 | } | |
3194 | ||
3195 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3196 | ||
3197 | pi->conn_state |= L2CAP_CONN_SAR_SDU; | |
3198 | pi->partial_sdu_len = skb->len; | |
3199 | err = 0; | |
3200 | break; | |
3201 | ||
3202 | case L2CAP_SDU_CONTINUE: | |
3203 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3204 | break; | |
3205 | ||
3206 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3207 | ||
3208 | pi->partial_sdu_len += skb->len; | |
3209 | if (pi->partial_sdu_len > pi->sdu_len) | |
3210 | kfree_skb(pi->sdu); | |
3211 | else | |
3212 | err = 0; | |
3213 | ||
3214 | break; | |
3215 | ||
3216 | case L2CAP_SDU_END: | |
3217 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) | |
3218 | break; | |
3219 | ||
3220 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); | |
3221 | ||
3222 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; | |
3223 | pi->partial_sdu_len += skb->len; | |
3224 | ||
3225 | if (pi->partial_sdu_len == pi->sdu_len) { | |
3226 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); | |
3227 | err = sock_queue_rcv_skb(sk, _skb); | |
3228 | if (err < 0) | |
3229 | kfree_skb(_skb); | |
3230 | } | |
3231 | kfree_skb(pi->sdu); | |
3232 | err = 0; | |
3233 | ||
3234 | break; | |
3235 | } | |
3236 | ||
3237 | kfree_skb(skb); | |
3238 | return err; | |
3239 | } | |
3240 | ||
8f17154f GP |
3241 | static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq) |
3242 | { | |
3243 | struct sk_buff *skb; | |
3244 | u16 control = 0; | |
3245 | ||
3246 | while((skb = skb_peek(SREJ_QUEUE(sk)))) { | |
3247 | if (bt_cb(skb)->tx_seq != tx_seq) | |
3248 | break; | |
3249 | ||
3250 | skb = skb_dequeue(SREJ_QUEUE(sk)); | |
3251 | control |= bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; | |
3252 | l2cap_sar_reassembly_sdu(sk, skb, control); | |
3253 | l2cap_pi(sk)->buffer_seq_srej = | |
3254 | (l2cap_pi(sk)->buffer_seq_srej + 1) % 64; | |
3255 | tx_seq++; | |
3256 | } | |
3257 | } | |
3258 | ||
3259 | static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq) | |
3260 | { | |
3261 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3262 | struct srej_list *l, *tmp; | |
3263 | u16 control; | |
3264 | ||
3265 | list_for_each_entry_safe(l,tmp, SREJ_LIST(sk), list) { | |
3266 | if (l->tx_seq == tx_seq) { | |
3267 | list_del(&l->list); | |
3268 | kfree(l); | |
3269 | return; | |
3270 | } | |
3271 | control = L2CAP_SUPER_SELECT_REJECT; | |
3272 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3273 | l2cap_send_sframe(pi, control); | |
3274 | list_del(&l->list); | |
3275 | list_add_tail(&l->list, SREJ_LIST(sk)); | |
3276 | } | |
3277 | } | |
3278 | ||
3279 | static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) | |
3280 | { | |
3281 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3282 | struct srej_list *new; | |
3283 | u16 control; | |
3284 | ||
3285 | while (tx_seq != pi->expected_tx_seq) { | |
3286 | control = L2CAP_SUPER_SELECT_REJECT; | |
3287 | control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
ef54fd93 GP |
3288 | if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { |
3289 | control |= L2CAP_CTRL_POLL; | |
3290 | pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; | |
3291 | } | |
8f17154f GP |
3292 | l2cap_send_sframe(pi, control); |
3293 | ||
3294 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); | |
3295 | new->tx_seq = pi->expected_tx_seq++; | |
3296 | list_add_tail(&new->list, SREJ_LIST(sk)); | |
3297 | } | |
3298 | pi->expected_tx_seq++; | |
3299 | } | |
3300 | ||
1c2acffb GP |
3301 | static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
3302 | { | |
3303 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
3304 | u8 tx_seq = __get_txseq(rx_control); | |
9f121a5a | 3305 | u8 req_seq = __get_reqseq(rx_control); |
1c2acffb | 3306 | u16 tx_control = 0; |
8f17154f | 3307 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
1c2acffb GP |
3308 | int err = 0; |
3309 | ||
3310 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
3311 | ||
9f121a5a GP |
3312 | pi->expected_ack_seq = req_seq; |
3313 | l2cap_drop_acked_frames(sk); | |
3314 | ||
8f17154f GP |
3315 | if (tx_seq == pi->expected_tx_seq) |
3316 | goto expected; | |
1c2acffb | 3317 | |
8f17154f GP |
3318 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
3319 | struct srej_list *first; | |
30afb5b2 | 3320 | |
8f17154f GP |
3321 | first = list_first_entry(SREJ_LIST(sk), |
3322 | struct srej_list, list); | |
3323 | if (tx_seq == first->tx_seq) { | |
3324 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3325 | l2cap_check_srej_gap(sk, tx_seq); | |
3326 | ||
3327 | list_del(&first->list); | |
3328 | kfree(first); | |
3329 | ||
3330 | if (list_empty(SREJ_LIST(sk))) { | |
3331 | pi->buffer_seq = pi->buffer_seq_srej; | |
3332 | pi->conn_state &= ~L2CAP_CONN_SREJ_SENT; | |
3333 | } | |
3334 | } else { | |
3335 | struct srej_list *l; | |
3336 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3337 | ||
3338 | list_for_each_entry(l, SREJ_LIST(sk), list) { | |
3339 | if (l->tx_seq == tx_seq) { | |
3340 | l2cap_resend_srejframe(sk, tx_seq); | |
3341 | return 0; | |
3342 | } | |
3343 | } | |
3344 | l2cap_send_srejframe(sk, tx_seq); | |
30afb5b2 GP |
3345 | } |
3346 | } else { | |
8f17154f | 3347 | pi->conn_state |= L2CAP_CONN_SREJ_SENT; |
1c2acffb | 3348 | |
8f17154f GP |
3349 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
3350 | pi->buffer_seq_srej = pi->buffer_seq; | |
3351 | ||
3352 | __skb_queue_head_init(SREJ_QUEUE(sk)); | |
3353 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3354 | ||
ef54fd93 GP |
3355 | pi->conn_state |= L2CAP_CONN_SEND_PBIT; |
3356 | ||
8f17154f | 3357 | l2cap_send_srejframe(sk, tx_seq); |
1c2acffb | 3358 | } |
30afb5b2 GP |
3359 | return 0; |
3360 | ||
8f17154f GP |
3361 | expected: |
3362 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
3363 | ||
3364 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { | |
3365 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); | |
3366 | return 0; | |
3367 | } | |
3368 | ||
4ec10d97 GP |
3369 | if (rx_control & L2CAP_CTRL_FINAL) { |
3370 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
3371 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
3372 | else { | |
3373 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
3374 | pi->next_tx_seq = pi->expected_ack_seq; | |
3375 | l2cap_ertm_send(sk); | |
3376 | } | |
3377 | } | |
3378 | ||
8f17154f GP |
3379 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; |
3380 | ||
3381 | err = l2cap_sar_reassembly_sdu(sk, skb, rx_control); | |
3382 | if (err < 0) | |
3383 | return err; | |
3384 | ||
3385 | pi->num_to_ack = (pi->num_to_ack + 1) % L2CAP_DEFAULT_NUM_TO_ACK; | |
3386 | if (pi->num_to_ack == L2CAP_DEFAULT_NUM_TO_ACK - 1) { | |
3387 | tx_control |= L2CAP_SUPER_RCV_READY; | |
3388 | tx_control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; | |
3389 | l2cap_send_sframe(pi, tx_control); | |
3390 | } | |
3391 | return 0; | |
1c2acffb GP |
3392 | } |
3393 | ||
3394 | static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) | |
3395 | { | |
3396 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
8f17154f | 3397 | u8 tx_seq = __get_reqseq(rx_control); |
1c2acffb GP |
3398 | |
3399 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); | |
3400 | ||
3401 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { | |
3402 | case L2CAP_SUPER_RCV_READY: | |
e90bac06 GP |
3403 | if (rx_control & L2CAP_CTRL_POLL) { |
3404 | u16 control = L2CAP_CTRL_FINAL; | |
ca42a613 GP |
3405 | control |= L2CAP_SUPER_RCV_READY | |
3406 | (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT); | |
e90bac06 | 3407 | l2cap_send_sframe(l2cap_pi(sk), control); |
2246b2f1 GP |
3408 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
3409 | ||
e90bac06 | 3410 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
2246b2f1 | 3411 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
ca42a613 GP |
3412 | pi->expected_ack_seq = tx_seq; |
3413 | l2cap_drop_acked_frames(sk); | |
3414 | ||
4ec10d97 GP |
3415 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
3416 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
3417 | else { | |
3418 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
3419 | pi->next_tx_seq = pi->expected_ack_seq; | |
3420 | l2cap_ertm_send(sk); | |
3421 | } | |
3422 | ||
e90bac06 GP |
3423 | if (!(pi->conn_state & L2CAP_CONN_WAIT_F)) |
3424 | break; | |
3425 | ||
3426 | pi->conn_state &= ~L2CAP_CONN_WAIT_F; | |
3427 | del_timer(&pi->monitor_timer); | |
3428 | ||
3429 | if (pi->unacked_frames > 0) | |
3430 | __mod_retrans_timer(); | |
3431 | } else { | |
8f17154f | 3432 | pi->expected_ack_seq = tx_seq; |
e90bac06 | 3433 | l2cap_drop_acked_frames(sk); |
2246b2f1 | 3434 | |
f64f9e71 JP |
3435 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
3436 | (pi->unacked_frames > 0)) | |
e90bac06 | 3437 | __mod_retrans_timer(); |
2246b2f1 | 3438 | |
2246b2f1 | 3439 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
186de9a3 | 3440 | l2cap_ertm_send(sk); |
e90bac06 | 3441 | } |
1c2acffb GP |
3442 | break; |
3443 | ||
1c2acffb | 3444 | case L2CAP_SUPER_REJECT: |
2246b2f1 GP |
3445 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
3446 | ||
30afb5b2 GP |
3447 | pi->expected_ack_seq = __get_reqseq(rx_control); |
3448 | l2cap_drop_acked_frames(sk); | |
3449 | ||
4ec10d97 GP |
3450 | if (rx_control & L2CAP_CTRL_FINAL) { |
3451 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) | |
3452 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; | |
3453 | else { | |
3454 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
3455 | pi->next_tx_seq = pi->expected_ack_seq; | |
3456 | l2cap_ertm_send(sk); | |
3457 | } | |
3458 | } else { | |
3459 | sk->sk_send_head = TX_QUEUE(sk)->next; | |
3460 | pi->next_tx_seq = pi->expected_ack_seq; | |
3461 | l2cap_ertm_send(sk); | |
30afb5b2 | 3462 | |
4ec10d97 GP |
3463 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
3464 | pi->srej_save_reqseq = tx_seq; | |
3465 | pi->conn_state |= L2CAP_CONN_REJ_ACT; | |
3466 | } | |
3467 | } | |
30afb5b2 GP |
3468 | |
3469 | break; | |
3470 | ||
1c2acffb | 3471 | case L2CAP_SUPER_SELECT_REJECT: |
2246b2f1 GP |
3472 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
3473 | ||
ef54fd93 | 3474 | if (rx_control & L2CAP_CTRL_POLL) { |
ef54fd93 GP |
3475 | pi->expected_ack_seq = tx_seq; |
3476 | l2cap_drop_acked_frames(sk); | |
186ee8cf | 3477 | l2cap_retransmit_frame(sk, tx_seq); |
ef54fd93 GP |
3478 | l2cap_ertm_send(sk); |
3479 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { | |
3480 | pi->srej_save_reqseq = tx_seq; | |
3481 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
3482 | } | |
3483 | } else if (rx_control & L2CAP_CTRL_FINAL) { | |
3484 | if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && | |
3485 | pi->srej_save_reqseq == tx_seq) | |
889a3ca4 | 3486 | pi->conn_state &= ~L2CAP_CONN_SREJ_ACT; |
ef54fd93 GP |
3487 | else |
3488 | l2cap_retransmit_frame(sk, tx_seq); | |
3489 | } | |
3490 | else { | |
3491 | l2cap_retransmit_frame(sk, tx_seq); | |
3492 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { | |
3493 | pi->srej_save_reqseq = tx_seq; | |
3494 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; | |
3495 | } | |
3496 | } | |
8f17154f GP |
3497 | break; |
3498 | ||
3499 | case L2CAP_SUPER_RCV_NOT_READY: | |
2246b2f1 GP |
3500 | pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; |
3501 | pi->expected_ack_seq = tx_seq; | |
3502 | l2cap_drop_acked_frames(sk); | |
3503 | ||
3504 | del_timer(&l2cap_pi(sk)->retrans_timer); | |
3505 | if (rx_control & L2CAP_CTRL_POLL) { | |
7e743090 GP |
3506 | u16 control = L2CAP_CTRL_FINAL; |
3507 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); | |
2246b2f1 | 3508 | } |
1c2acffb GP |
3509 | break; |
3510 | } | |
3511 | ||
3512 | return 0; | |
3513 | } | |
3514 | ||
1da177e4 LT |
3515 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
3516 | { | |
3517 | struct sock *sk; | |
6840ed07 | 3518 | struct l2cap_pinfo *pi; |
c74e560c | 3519 | u16 control, len; |
6840ed07 | 3520 | u8 tx_seq; |
1da177e4 LT |
3521 | |
3522 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); | |
3523 | if (!sk) { | |
3524 | BT_DBG("unknown cid 0x%4.4x", cid); | |
3525 | goto drop; | |
3526 | } | |
3527 | ||
6840ed07 GP |
3528 | pi = l2cap_pi(sk); |
3529 | ||
1da177e4 LT |
3530 | BT_DBG("sk %p, len %d", sk, skb->len); |
3531 | ||
3532 | if (sk->sk_state != BT_CONNECTED) | |
3533 | goto drop; | |
3534 | ||
6840ed07 | 3535 | switch (pi->mode) { |
1c2acffb GP |
3536 | case L2CAP_MODE_BASIC: |
3537 | /* If socket recv buffers overflows we drop data here | |
3538 | * which is *bad* because L2CAP has to be reliable. | |
3539 | * But we don't have any other choice. L2CAP doesn't | |
3540 | * provide flow control mechanism. */ | |
1da177e4 | 3541 | |
6840ed07 | 3542 | if (pi->imtu < skb->len) |
1c2acffb | 3543 | goto drop; |
1da177e4 | 3544 | |
1c2acffb GP |
3545 | if (!sock_queue_rcv_skb(sk, skb)) |
3546 | goto done; | |
3547 | break; | |
3548 | ||
3549 | case L2CAP_MODE_ERTM: | |
3550 | control = get_unaligned_le16(skb->data); | |
3551 | skb_pull(skb, 2); | |
c74e560c | 3552 | len = skb->len; |
1c2acffb | 3553 | |
c74e560c GP |
3554 | if (__is_sar_start(control)) |
3555 | len -= 2; | |
3556 | ||
fcc203c3 GP |
3557 | if (pi->fcs == L2CAP_FCS_CRC16) |
3558 | len -= 2; | |
3559 | ||
30afb5b2 GP |
3560 | /* |
3561 | * We can just drop the corrupted I-frame here. | |
3562 | * Receiver will miss it and start proper recovery | |
3563 | * procedures and ask retransmission. | |
3564 | */ | |
c74e560c | 3565 | if (len > L2CAP_DEFAULT_MAX_PDU_SIZE) |
1c2acffb GP |
3566 | goto drop; |
3567 | ||
fcc203c3 GP |
3568 | if (l2cap_check_fcs(pi, skb)) |
3569 | goto drop; | |
3570 | ||
1c2acffb | 3571 | if (__is_iframe(control)) |
fcafde2e | 3572 | l2cap_data_channel_iframe(sk, control, skb); |
1c2acffb | 3573 | else |
fcafde2e | 3574 | l2cap_data_channel_sframe(sk, control, skb); |
1c2acffb | 3575 | |
fcafde2e | 3576 | goto done; |
1c2acffb | 3577 | |
6840ed07 GP |
3578 | case L2CAP_MODE_STREAMING: |
3579 | control = get_unaligned_le16(skb->data); | |
3580 | skb_pull(skb, 2); | |
3581 | len = skb->len; | |
3582 | ||
3583 | if (__is_sar_start(control)) | |
3584 | len -= 2; | |
3585 | ||
fcc203c3 GP |
3586 | if (pi->fcs == L2CAP_FCS_CRC16) |
3587 | len -= 2; | |
3588 | ||
6840ed07 GP |
3589 | if (len > L2CAP_DEFAULT_MAX_PDU_SIZE || __is_sframe(control)) |
3590 | goto drop; | |
3591 | ||
fcc203c3 GP |
3592 | if (l2cap_check_fcs(pi, skb)) |
3593 | goto drop; | |
3594 | ||
6840ed07 GP |
3595 | tx_seq = __get_txseq(control); |
3596 | ||
3597 | if (pi->expected_tx_seq == tx_seq) | |
3598 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; | |
3599 | else | |
3600 | pi->expected_tx_seq = tx_seq + 1; | |
3601 | ||
fcafde2e | 3602 | l2cap_sar_reassembly_sdu(sk, skb, control); |
6840ed07 GP |
3603 | |
3604 | goto done; | |
3605 | ||
1c2acffb GP |
3606 | default: |
3607 | BT_DBG("sk %p: bad mode 0x%2.2x", sk, l2cap_pi(sk)->mode); | |
3608 | break; | |
3609 | } | |
1da177e4 LT |
3610 | |
3611 | drop: | |
3612 | kfree_skb(skb); | |
3613 | ||
3614 | done: | |
0139418c MH |
3615 | if (sk) |
3616 | bh_unlock_sock(sk); | |
3617 | ||
1da177e4 LT |
3618 | return 0; |
3619 | } | |
3620 | ||
8e036fc3 | 3621 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
1da177e4 LT |
3622 | { |
3623 | struct sock *sk; | |
3624 | ||
3625 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); | |
3626 | if (!sk) | |
3627 | goto drop; | |
3628 | ||
3629 | BT_DBG("sk %p, len %d", sk, skb->len); | |
3630 | ||
3631 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) | |
3632 | goto drop; | |
3633 | ||
3634 | if (l2cap_pi(sk)->imtu < skb->len) | |
3635 | goto drop; | |
3636 | ||
3637 | if (!sock_queue_rcv_skb(sk, skb)) | |
3638 | goto done; | |
3639 | ||
3640 | drop: | |
3641 | kfree_skb(skb); | |
3642 | ||
3643 | done: | |
af05b30b GP |
3644 | if (sk) |
3645 | bh_unlock_sock(sk); | |
1da177e4 LT |
3646 | return 0; |
3647 | } | |
3648 | ||
3649 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) | |
3650 | { | |
3651 | struct l2cap_hdr *lh = (void *) skb->data; | |
8e036fc3 AV |
3652 | u16 cid, len; |
3653 | __le16 psm; | |
1da177e4 LT |
3654 | |
3655 | skb_pull(skb, L2CAP_HDR_SIZE); | |
3656 | cid = __le16_to_cpu(lh->cid); | |
3657 | len = __le16_to_cpu(lh->len); | |
3658 | ||
1c2acffb GP |
3659 | if (len != skb->len) { |
3660 | kfree_skb(skb); | |
3661 | return; | |
3662 | } | |
3663 | ||
1da177e4 LT |
3664 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
3665 | ||
3666 | switch (cid) { | |
8db4dc46 | 3667 | case L2CAP_CID_SIGNALING: |
1da177e4 LT |
3668 | l2cap_sig_channel(conn, skb); |
3669 | break; | |
3670 | ||
8db4dc46 | 3671 | case L2CAP_CID_CONN_LESS: |
1b7bf4ed | 3672 | psm = get_unaligned_le16(skb->data); |
1da177e4 LT |
3673 | skb_pull(skb, 2); |
3674 | l2cap_conless_channel(conn, psm, skb); | |
3675 | break; | |
3676 | ||
3677 | default: | |
3678 | l2cap_data_channel(conn, cid, skb); | |
3679 | break; | |
3680 | } | |
3681 | } | |
3682 | ||
3683 | /* ---- L2CAP interface with lower layer (HCI) ---- */ | |
3684 | ||
3685 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) | |
3686 | { | |
3687 | int exact = 0, lm1 = 0, lm2 = 0; | |
3688 | register struct sock *sk; | |
3689 | struct hlist_node *node; | |
3690 | ||
3691 | if (type != ACL_LINK) | |
3692 | return 0; | |
3693 | ||
3694 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
3695 | ||
3696 | /* Find listening sockets and check their link_mode */ | |
3697 | read_lock(&l2cap_sk_list.lock); | |
3698 | sk_for_each(sk, node, &l2cap_sk_list.head) { | |
3699 | if (sk->sk_state != BT_LISTEN) | |
3700 | continue; | |
3701 | ||
3702 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { | |
2af6b9d5 MH |
3703 | lm1 |= HCI_LM_ACCEPT; |
3704 | if (l2cap_pi(sk)->role_switch) | |
3705 | lm1 |= HCI_LM_MASTER; | |
1da177e4 | 3706 | exact++; |
2af6b9d5 MH |
3707 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
3708 | lm2 |= HCI_LM_ACCEPT; | |
3709 | if (l2cap_pi(sk)->role_switch) | |
3710 | lm2 |= HCI_LM_MASTER; | |
3711 | } | |
1da177e4 LT |
3712 | } |
3713 | read_unlock(&l2cap_sk_list.lock); | |
3714 | ||
3715 | return exact ? lm1 : lm2; | |
3716 | } | |
3717 | ||
3718 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) | |
3719 | { | |
0139418c MH |
3720 | struct l2cap_conn *conn; |
3721 | ||
1da177e4 LT |
3722 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
3723 | ||
3724 | if (hcon->type != ACL_LINK) | |
3725 | return 0; | |
3726 | ||
3727 | if (!status) { | |
1da177e4 LT |
3728 | conn = l2cap_conn_add(hcon, status); |
3729 | if (conn) | |
3730 | l2cap_conn_ready(conn); | |
0139418c | 3731 | } else |
1da177e4 LT |
3732 | l2cap_conn_del(hcon, bt_err(status)); |
3733 | ||
3734 | return 0; | |
3735 | } | |
3736 | ||
2950f21a MH |
3737 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
3738 | { | |
3739 | struct l2cap_conn *conn = hcon->l2cap_data; | |
3740 | ||
3741 | BT_DBG("hcon %p", hcon); | |
3742 | ||
3743 | if (hcon->type != ACL_LINK || !conn) | |
3744 | return 0x13; | |
3745 | ||
3746 | return conn->disc_reason; | |
3747 | } | |
3748 | ||
3749 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) | |
1da177e4 LT |
3750 | { |
3751 | BT_DBG("hcon %p reason %d", hcon, reason); | |
3752 | ||
3753 | if (hcon->type != ACL_LINK) | |
3754 | return 0; | |
3755 | ||
3756 | l2cap_conn_del(hcon, bt_err(reason)); | |
0139418c | 3757 | |
1da177e4 LT |
3758 | return 0; |
3759 | } | |
3760 | ||
f62e4323 MH |
3761 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
3762 | { | |
255c7601 MH |
3763 | if (sk->sk_type != SOCK_SEQPACKET) |
3764 | return; | |
3765 | ||
f62e4323 MH |
3766 | if (encrypt == 0x00) { |
3767 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { | |
3768 | l2cap_sock_clear_timer(sk); | |
3769 | l2cap_sock_set_timer(sk, HZ * 5); | |
3770 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) | |
3771 | __l2cap_sock_close(sk, ECONNREFUSED); | |
3772 | } else { | |
3773 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) | |
3774 | l2cap_sock_clear_timer(sk); | |
3775 | } | |
3776 | } | |
3777 | ||
8c1b2355 | 3778 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
1da177e4 LT |
3779 | { |
3780 | struct l2cap_chan_list *l; | |
0139418c | 3781 | struct l2cap_conn *conn = hcon->l2cap_data; |
1da177e4 | 3782 | struct sock *sk; |
1da177e4 | 3783 | |
0139418c | 3784 | if (!conn) |
1da177e4 | 3785 | return 0; |
0139418c | 3786 | |
1da177e4 LT |
3787 | l = &conn->chan_list; |
3788 | ||
3789 | BT_DBG("conn %p", conn); | |
3790 | ||
3791 | read_lock(&l->lock); | |
3792 | ||
3793 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { | |
3794 | bh_lock_sock(sk); | |
3795 | ||
6a8d3010 MH |
3796 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
3797 | bh_unlock_sock(sk); | |
3798 | continue; | |
3799 | } | |
3800 | ||
f62e4323 | 3801 | if (!status && (sk->sk_state == BT_CONNECTED || |
8c1b2355 | 3802 | sk->sk_state == BT_CONFIG)) { |
f62e4323 | 3803 | l2cap_check_encryption(sk, encrypt); |
9719f8af MH |
3804 | bh_unlock_sock(sk); |
3805 | continue; | |
3806 | } | |
3807 | ||
b1235d79 MH |
3808 | if (sk->sk_state == BT_CONNECT) { |
3809 | if (!status) { | |
3810 | struct l2cap_conn_req req; | |
3811 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); | |
3812 | req.psm = l2cap_pi(sk)->psm; | |
1da177e4 | 3813 | |
b1235d79 | 3814 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
1da177e4 | 3815 | |
b1235d79 MH |
3816 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
3817 | L2CAP_CONN_REQ, sizeof(req), &req); | |
3818 | } else { | |
3819 | l2cap_sock_clear_timer(sk); | |
3820 | l2cap_sock_set_timer(sk, HZ / 10); | |
3821 | } | |
3822 | } else if (sk->sk_state == BT_CONNECT2) { | |
3823 | struct l2cap_conn_rsp rsp; | |
3824 | __u16 result; | |
1da177e4 | 3825 | |
b1235d79 MH |
3826 | if (!status) { |
3827 | sk->sk_state = BT_CONFIG; | |
3828 | result = L2CAP_CR_SUCCESS; | |
3829 | } else { | |
3830 | sk->sk_state = BT_DISCONN; | |
3831 | l2cap_sock_set_timer(sk, HZ / 10); | |
3832 | result = L2CAP_CR_SEC_BLOCK; | |
3833 | } | |
3834 | ||
3835 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
3836 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
3837 | rsp.result = cpu_to_le16(result); | |
e7c29cb1 | 3838 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
b1235d79 MH |
3839 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
3840 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
3841 | } | |
1da177e4 LT |
3842 | |
3843 | bh_unlock_sock(sk); | |
3844 | } | |
3845 | ||
3846 | read_unlock(&l->lock); | |
b1235d79 | 3847 | |
1da177e4 LT |
3848 | return 0; |
3849 | } | |
3850 | ||
3851 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
3852 | { | |
3853 | struct l2cap_conn *conn = hcon->l2cap_data; | |
3854 | ||
3855 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) | |
3856 | goto drop; | |
3857 | ||
3858 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); | |
3859 | ||
3860 | if (flags & ACL_START) { | |
3861 | struct l2cap_hdr *hdr; | |
3862 | int len; | |
3863 | ||
3864 | if (conn->rx_len) { | |
3865 | BT_ERR("Unexpected start frame (len %d)", skb->len); | |
3866 | kfree_skb(conn->rx_skb); | |
3867 | conn->rx_skb = NULL; | |
3868 | conn->rx_len = 0; | |
3869 | l2cap_conn_unreliable(conn, ECOMM); | |
3870 | } | |
3871 | ||
3872 | if (skb->len < 2) { | |
3873 | BT_ERR("Frame is too short (len %d)", skb->len); | |
3874 | l2cap_conn_unreliable(conn, ECOMM); | |
3875 | goto drop; | |
3876 | } | |
3877 | ||
3878 | hdr = (struct l2cap_hdr *) skb->data; | |
3879 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; | |
3880 | ||
3881 | if (len == skb->len) { | |
3882 | /* Complete frame received */ | |
3883 | l2cap_recv_frame(conn, skb); | |
3884 | return 0; | |
3885 | } | |
3886 | ||
3887 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); | |
3888 | ||
3889 | if (skb->len > len) { | |
3890 | BT_ERR("Frame is too long (len %d, expected len %d)", | |
3891 | skb->len, len); | |
3892 | l2cap_conn_unreliable(conn, ECOMM); | |
3893 | goto drop; | |
3894 | } | |
3895 | ||
3896 | /* Allocate skb for the complete frame (with header) */ | |
af05b30b GP |
3897 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
3898 | if (!conn->rx_skb) | |
1da177e4 LT |
3899 | goto drop; |
3900 | ||
d626f62b | 3901 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 3902 | skb->len); |
1da177e4 LT |
3903 | conn->rx_len = len - skb->len; |
3904 | } else { | |
3905 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); | |
3906 | ||
3907 | if (!conn->rx_len) { | |
3908 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); | |
3909 | l2cap_conn_unreliable(conn, ECOMM); | |
3910 | goto drop; | |
3911 | } | |
3912 | ||
3913 | if (skb->len > conn->rx_len) { | |
3914 | BT_ERR("Fragment is too long (len %d, expected %d)", | |
3915 | skb->len, conn->rx_len); | |
3916 | kfree_skb(conn->rx_skb); | |
3917 | conn->rx_skb = NULL; | |
3918 | conn->rx_len = 0; | |
3919 | l2cap_conn_unreliable(conn, ECOMM); | |
3920 | goto drop; | |
3921 | } | |
3922 | ||
d626f62b | 3923 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
e1027a7c | 3924 | skb->len); |
1da177e4 LT |
3925 | conn->rx_len -= skb->len; |
3926 | ||
3927 | if (!conn->rx_len) { | |
3928 | /* Complete frame received */ | |
3929 | l2cap_recv_frame(conn, conn->rx_skb); | |
3930 | conn->rx_skb = NULL; | |
3931 | } | |
3932 | } | |
3933 | ||
3934 | drop: | |
3935 | kfree_skb(skb); | |
3936 | return 0; | |
3937 | } | |
3938 | ||
be9d1227 | 3939 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
3940 | { |
3941 | struct sock *sk; | |
3942 | struct hlist_node *node; | |
be9d1227 | 3943 | char *str = buf; |
1da177e4 LT |
3944 | |
3945 | read_lock_bh(&l2cap_sk_list.lock); | |
3946 | ||
be9d1227 MH |
3947 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
3948 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
1da177e4 | 3949 | |
2af6b9d5 | 3950 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
be9d1227 | 3951 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), |
b4324b5d MH |
3952 | sk->sk_state, __le16_to_cpu(pi->psm), pi->scid, |
3953 | pi->dcid, pi->imtu, pi->omtu, pi->sec_level); | |
be9d1227 | 3954 | } |
1da177e4 | 3955 | |
1da177e4 | 3956 | read_unlock_bh(&l2cap_sk_list.lock); |
1da177e4 | 3957 | |
af05b30b | 3958 | return str - buf; |
1da177e4 LT |
3959 | } |
3960 | ||
be9d1227 | 3961 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
1da177e4 | 3962 | |
90ddc4f0 | 3963 | static const struct proto_ops l2cap_sock_ops = { |
1da177e4 LT |
3964 | .family = PF_BLUETOOTH, |
3965 | .owner = THIS_MODULE, | |
3966 | .release = l2cap_sock_release, | |
3967 | .bind = l2cap_sock_bind, | |
3968 | .connect = l2cap_sock_connect, | |
3969 | .listen = l2cap_sock_listen, | |
3970 | .accept = l2cap_sock_accept, | |
3971 | .getname = l2cap_sock_getname, | |
3972 | .sendmsg = l2cap_sock_sendmsg, | |
f66dc81f | 3973 | .recvmsg = l2cap_sock_recvmsg, |
1da177e4 | 3974 | .poll = bt_sock_poll, |
3241ad82 | 3975 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
3976 | .mmap = sock_no_mmap, |
3977 | .socketpair = sock_no_socketpair, | |
1da177e4 LT |
3978 | .shutdown = l2cap_sock_shutdown, |
3979 | .setsockopt = l2cap_sock_setsockopt, | |
3980 | .getsockopt = l2cap_sock_getsockopt | |
3981 | }; | |
3982 | ||
ec1b4cf7 | 3983 | static const struct net_proto_family l2cap_sock_family_ops = { |
1da177e4 LT |
3984 | .family = PF_BLUETOOTH, |
3985 | .owner = THIS_MODULE, | |
3986 | .create = l2cap_sock_create, | |
3987 | }; | |
3988 | ||
3989 | static struct hci_proto l2cap_hci_proto = { | |
3990 | .name = "L2CAP", | |
3991 | .id = HCI_PROTO_L2CAP, | |
3992 | .connect_ind = l2cap_connect_ind, | |
3993 | .connect_cfm = l2cap_connect_cfm, | |
3994 | .disconn_ind = l2cap_disconn_ind, | |
2950f21a | 3995 | .disconn_cfm = l2cap_disconn_cfm, |
8c1b2355 | 3996 | .security_cfm = l2cap_security_cfm, |
1da177e4 LT |
3997 | .recv_acldata = l2cap_recv_acldata |
3998 | }; | |
3999 | ||
4000 | static int __init l2cap_init(void) | |
4001 | { | |
4002 | int err; | |
be9d1227 | 4003 | |
1da177e4 LT |
4004 | err = proto_register(&l2cap_proto, 0); |
4005 | if (err < 0) | |
4006 | return err; | |
4007 | ||
4008 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
4009 | if (err < 0) { | |
4010 | BT_ERR("L2CAP socket registration failed"); | |
4011 | goto error; | |
4012 | } | |
4013 | ||
4014 | err = hci_register_proto(&l2cap_hci_proto); | |
4015 | if (err < 0) { | |
4016 | BT_ERR("L2CAP protocol registration failed"); | |
4017 | bt_sock_unregister(BTPROTO_L2CAP); | |
4018 | goto error; | |
4019 | } | |
4020 | ||
df5c37ea MH |
4021 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
4022 | BT_ERR("Failed to create L2CAP info file"); | |
1da177e4 LT |
4023 | |
4024 | BT_INFO("L2CAP ver %s", VERSION); | |
4025 | BT_INFO("L2CAP socket layer initialized"); | |
4026 | ||
4027 | return 0; | |
4028 | ||
4029 | error: | |
4030 | proto_unregister(&l2cap_proto); | |
4031 | return err; | |
4032 | } | |
4033 | ||
4034 | static void __exit l2cap_exit(void) | |
4035 | { | |
a91f2e39 | 4036 | class_remove_file(bt_class, &class_attr_l2cap); |
1da177e4 LT |
4037 | |
4038 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
4039 | BT_ERR("L2CAP socket unregistration failed"); | |
4040 | ||
4041 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) | |
4042 | BT_ERR("L2CAP protocol unregistration failed"); | |
4043 | ||
4044 | proto_unregister(&l2cap_proto); | |
4045 | } | |
4046 | ||
4047 | void l2cap_load(void) | |
4048 | { | |
4049 | /* Dummy function to trigger automatic L2CAP module loading by | |
4050 | * other modules that use L2CAP sockets but don't use any other | |
4051 | * symbols from it. */ | |
4052 | return; | |
4053 | } | |
4054 | EXPORT_SYMBOL(l2cap_load); | |
4055 | ||
4056 | module_init(l2cap_init); | |
4057 | module_exit(l2cap_exit); | |
4058 | ||
44dd46de MH |
4059 | module_param(enable_ertm, bool, 0644); |
4060 | MODULE_PARM_DESC(enable_ertm, "Enable enhanced retransmission mode"); | |
4061 | ||
5fbcd3d1 MH |
4062 | module_param(max_transmit, uint, 0644); |
4063 | MODULE_PARM_DESC(max_transmit, "Max transmit value (default = 3)"); | |
4064 | ||
63fbd24e | 4065 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
4066 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
4067 | MODULE_VERSION(VERSION); | |
4068 | MODULE_LICENSE("GPL"); | |
4069 | MODULE_ALIAS("bt-proto-0"); |