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Commit | Line | Data |
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bb58f747 GP |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> | |
5 | Copyright (C) 2010 Google Inc. | |
590051de | 6 | Copyright (C) 2011 ProFUSION Embedded Systems |
bb58f747 GP |
7 | |
8 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License version 2 as | |
12 | published by the Free Software Foundation; | |
13 | ||
14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
15 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
17 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
18 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
21 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
22 | ||
23 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
24 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
25 | SOFTWARE IS DISCLAIMED. | |
26 | */ | |
27 | ||
28 | /* Bluetooth L2CAP sockets. */ | |
29 | ||
9149761a | 30 | #include <linux/module.h> |
bc3b2d7f | 31 | #include <linux/export.h> |
174cd4b1 | 32 | #include <linux/sched/signal.h> |
6230c9b4 | 33 | |
bb58f747 | 34 | #include <net/bluetooth/bluetooth.h> |
33575df7 | 35 | #include <net/bluetooth/hci_core.h> |
bb58f747 | 36 | #include <net/bluetooth/l2cap.h> |
ac4b7236 MH |
37 | |
38 | #include "smp.h" | |
bb58f747 | 39 | |
5b28d95c MY |
40 | static struct bt_sock_list l2cap_sk_list = { |
41 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) | |
42 | }; | |
43 | ||
cf2f90f5 | 44 | static const struct proto_ops l2cap_sock_ops; |
80808e43 | 45 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
2d792818 | 46 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
11aa9c28 | 47 | int proto, gfp_t prio, int kern); |
cf2f90f5 | 48 | |
b3916db3 DH |
49 | bool l2cap_is_socket(struct socket *sock) |
50 | { | |
51 | return sock && sock->ops == &l2cap_sock_ops; | |
52 | } | |
53 | EXPORT_SYMBOL(l2cap_is_socket); | |
54 | ||
4946096d JH |
55 | static int l2cap_validate_bredr_psm(u16 psm) |
56 | { | |
57 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
58 | if ((psm & 0x0101) != 0x0001) | |
59 | return -EINVAL; | |
60 | ||
61 | /* Restrict usage of well-known PSMs */ | |
114f9f1e | 62 | if (psm < L2CAP_PSM_DYN_START && !capable(CAP_NET_BIND_SERVICE)) |
4946096d JH |
63 | return -EACCES; |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
68 | static int l2cap_validate_le_psm(u16 psm) | |
69 | { | |
70 | /* Valid LE_PSM ranges are defined only until 0x00ff */ | |
114f9f1e | 71 | if (psm > L2CAP_PSM_LE_DYN_END) |
4946096d JH |
72 | return -EINVAL; |
73 | ||
74 | /* Restrict fixed, SIG assigned PSM values to CAP_NET_BIND_SERVICE */ | |
114f9f1e | 75 | if (psm < L2CAP_PSM_LE_DYN_START && !capable(CAP_NET_BIND_SERVICE)) |
4946096d JH |
76 | return -EACCES; |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
af6bcd82 GP |
81 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
82 | { | |
83 | struct sock *sk = sock->sk; | |
4343478f | 84 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
85 | struct sockaddr_l2 la; |
86 | int len, err = 0; | |
87 | ||
88 | BT_DBG("sk %p", sk); | |
89 | ||
d2ecfa76 MJ |
90 | if (!addr || alen < offsetofend(struct sockaddr, sa_family) || |
91 | addr->sa_family != AF_BLUETOOTH) | |
af6bcd82 GP |
92 | return -EINVAL; |
93 | ||
94 | memset(&la, 0, sizeof(la)); | |
95 | len = min_t(unsigned int, sizeof(la), alen); | |
96 | memcpy(&la, addr, len); | |
97 | ||
b62f328b | 98 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
99 | return -EINVAL; |
100 | ||
80c1a2e7 JH |
101 | if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) |
102 | return -EINVAL; | |
103 | ||
bfe4655f | 104 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
bfe4655f | 105 | /* We only allow ATT user space socket */ |
9149761a | 106 | if (la.l2_cid && |
dcf4adbf | 107 | la.l2_cid != cpu_to_le16(L2CAP_CID_ATT)) |
bfe4655f JH |
108 | return -EINVAL; |
109 | } | |
110 | ||
af6bcd82 GP |
111 | lock_sock(sk); |
112 | ||
113 | if (sk->sk_state != BT_OPEN) { | |
114 | err = -EBADFD; | |
115 | goto done; | |
116 | } | |
117 | ||
118 | if (la.l2_psm) { | |
119 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
120 | ||
4946096d JH |
121 | if (la.l2_bdaddr_type == BDADDR_BREDR) |
122 | err = l2cap_validate_bredr_psm(psm); | |
123 | else | |
124 | err = l2cap_validate_le_psm(psm); | |
af6bcd82 | 125 | |
4946096d | 126 | if (err) |
af6bcd82 | 127 | goto done; |
af6bcd82 GP |
128 | } |
129 | ||
a2342c5f JH |
130 | bacpy(&chan->src, &la.l2_bdaddr); |
131 | chan->src_type = la.l2_bdaddr_type; | |
132 | ||
9e4425ff | 133 | if (la.l2_cid) |
6e4aff10 | 134 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
135 | else |
136 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 137 | |
9e4425ff GP |
138 | if (err < 0) |
139 | goto done; | |
af6bcd82 | 140 | |
6a974b50 | 141 | switch (chan->chan_type) { |
3124b843 MH |
142 | case L2CAP_CHAN_CONN_LESS: |
143 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_3DSP) | |
144 | chan->sec_level = BT_SECURITY_SDP; | |
145 | break; | |
6a974b50 MH |
146 | case L2CAP_CHAN_CONN_ORIENTED: |
147 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP || | |
148 | __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM) | |
149 | chan->sec_level = BT_SECURITY_SDP; | |
150 | break; | |
cb6ca8e1 JH |
151 | case L2CAP_CHAN_RAW: |
152 | chan->sec_level = BT_SECURITY_SDP; | |
153 | break; | |
c16900cf JH |
154 | case L2CAP_CHAN_FIXED: |
155 | /* Fixed channels default to the L2CAP core not holding a | |
156 | * hci_conn reference for them. For fixed channels mapping to | |
157 | * L2CAP sockets we do want to hold a reference so set the | |
158 | * appropriate flag to request it. | |
159 | */ | |
160 | set_bit(FLAG_HOLD_HCI_CONN, &chan->flags); | |
161 | break; | |
6a974b50 | 162 | } |
b62f328b | 163 | |
0ebe9b9f LAD |
164 | /* Use L2CAP_MODE_LE_FLOWCTL (CoC) in case of LE address and |
165 | * L2CAP_MODE_EXT_FLOWCTL (ECRED) has not been set. | |
166 | */ | |
167 | if (chan->psm && bdaddr_type_is_le(chan->src_type) && | |
168 | chan->mode != L2CAP_MODE_EXT_FLOWCTL) | |
0ce43ce6 | 169 | chan->mode = L2CAP_MODE_LE_FLOWCTL; |
38319713 | 170 | |
89bc500e | 171 | chan->state = BT_BOUND; |
9e4425ff | 172 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
173 | |
174 | done: | |
175 | release_sock(sk); | |
176 | return err; | |
177 | } | |
178 | ||
0681c816 LAD |
179 | static void l2cap_sock_init_pid(struct sock *sk) |
180 | { | |
181 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
182 | ||
183 | /* Only L2CAP_MODE_EXT_FLOWCTL ever need to access the PID in order to | |
184 | * group the channels being requested. | |
185 | */ | |
186 | if (chan->mode != L2CAP_MODE_EXT_FLOWCTL) | |
187 | return; | |
188 | ||
189 | spin_lock(&sk->sk_peer_lock); | |
190 | sk->sk_peer_pid = get_pid(task_tgid(current)); | |
191 | spin_unlock(&sk->sk_peer_lock); | |
192 | } | |
193 | ||
2d792818 GP |
194 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, |
195 | int alen, int flags) | |
4e34c50b GP |
196 | { |
197 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 198 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
199 | struct sockaddr_l2 la; |
200 | int len, err = 0; | |
3af70b39 | 201 | bool zapped; |
4e34c50b GP |
202 | |
203 | BT_DBG("sk %p", sk); | |
204 | ||
3af70b39 AP |
205 | lock_sock(sk); |
206 | zapped = sock_flag(sk, SOCK_ZAPPED); | |
207 | release_sock(sk); | |
208 | ||
209 | if (zapped) | |
210 | return -EINVAL; | |
211 | ||
d2ecfa76 | 212 | if (!addr || alen < offsetofend(struct sockaddr, sa_family) || |
4e34c50b GP |
213 | addr->sa_family != AF_BLUETOOTH) |
214 | return -EINVAL; | |
215 | ||
216 | memset(&la, 0, sizeof(la)); | |
217 | len = min_t(unsigned int, sizeof(la), alen); | |
218 | memcpy(&la, addr, len); | |
219 | ||
acd7d370 | 220 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
221 | return -EINVAL; |
222 | ||
80c1a2e7 JH |
223 | if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) |
224 | return -EINVAL; | |
225 | ||
eb622495 JH |
226 | /* Check that the socket wasn't bound to something that |
227 | * conflicts with the address given to connect(). If chan->src | |
228 | * is BDADDR_ANY it means bind() was never used, in which case | |
229 | * chan->src_type and la.l2_bdaddr_type do not need to match. | |
230 | */ | |
231 | if (chan->src_type == BDADDR_BREDR && bacmp(&chan->src, BDADDR_ANY) && | |
232 | bdaddr_type_is_le(la.l2_bdaddr_type)) { | |
233 | /* Old user space versions will try to incorrectly bind | |
234 | * the ATT socket using BDADDR_BREDR. We need to accept | |
235 | * this and fix up the source address type only when | |
236 | * both the source CID and destination CID indicate | |
237 | * ATT. Anything else is an invalid combination. | |
238 | */ | |
239 | if (chan->scid != L2CAP_CID_ATT || | |
dcf4adbf | 240 | la.l2_cid != cpu_to_le16(L2CAP_CID_ATT)) |
eb622495 JH |
241 | return -EINVAL; |
242 | ||
243 | /* We don't have the hdev available here to make a | |
244 | * better decision on random vs public, but since all | |
245 | * user space versions that exhibit this issue anyway do | |
246 | * not support random local addresses assuming public | |
247 | * here is good enough. | |
248 | */ | |
249 | chan->src_type = BDADDR_LE_PUBLIC; | |
250 | } | |
1f209383 JH |
251 | |
252 | if (chan->src_type != BDADDR_BREDR && la.l2_bdaddr_type == BDADDR_BREDR) | |
253 | return -EINVAL; | |
254 | ||
bfe4655f | 255 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
bfe4655f | 256 | /* We only allow ATT user space socket */ |
9149761a | 257 | if (la.l2_cid && |
dcf4adbf | 258 | la.l2_cid != cpu_to_le16(L2CAP_CID_ATT)) |
bfe4655f JH |
259 | return -EINVAL; |
260 | } | |
261 | ||
0ebe9b9f LAD |
262 | /* Use L2CAP_MODE_LE_FLOWCTL (CoC) in case of LE address and |
263 | * L2CAP_MODE_EXT_FLOWCTL (ECRED) has not been set. | |
264 | */ | |
265 | if (chan->psm && bdaddr_type_is_le(chan->src_type) && | |
266 | chan->mode != L2CAP_MODE_EXT_FLOWCTL) | |
0ce43ce6 | 267 | chan->mode = L2CAP_MODE_LE_FLOWCTL; |
38319713 | 268 | |
0681c816 LAD |
269 | l2cap_sock_init_pid(sk); |
270 | ||
6e4aff10 | 271 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 272 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 273 | if (err) |
b3fb611e | 274 | return err; |
4e34c50b | 275 | |
6be36555 AE |
276 | lock_sock(sk); |
277 | ||
4e34c50b | 278 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
2d792818 | 279 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
b3fb611e AE |
280 | |
281 | release_sock(sk); | |
282 | ||
4e34c50b GP |
283 | return err; |
284 | } | |
285 | ||
af6bcd82 GP |
286 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
287 | { | |
288 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 289 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
290 | int err = 0; |
291 | ||
292 | BT_DBG("sk %p backlog %d", sk, backlog); | |
293 | ||
294 | lock_sock(sk); | |
295 | ||
6b3af733 | 296 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
297 | err = -EBADFD; |
298 | goto done; | |
299 | } | |
300 | ||
6b3af733 MH |
301 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
302 | err = -EINVAL; | |
303 | goto done; | |
304 | } | |
305 | ||
0c1bc5c6 | 306 | switch (chan->mode) { |
af6bcd82 | 307 | case L2CAP_MODE_BASIC: |
38319713 | 308 | case L2CAP_MODE_LE_FLOWCTL: |
4be5ca67 | 309 | break; |
15f02b91 | 310 | case L2CAP_MODE_EXT_FLOWCTL: |
4be5ca67 LAD |
311 | if (!enable_ecred) { |
312 | err = -EOPNOTSUPP; | |
313 | goto done; | |
314 | } | |
af6bcd82 GP |
315 | break; |
316 | case L2CAP_MODE_ERTM: | |
317 | case L2CAP_MODE_STREAMING: | |
318 | if (!disable_ertm) | |
319 | break; | |
19186c7b | 320 | fallthrough; |
af6bcd82 | 321 | default: |
beb19e4c | 322 | err = -EOPNOTSUPP; |
af6bcd82 GP |
323 | goto done; |
324 | } | |
325 | ||
0681c816 LAD |
326 | l2cap_sock_init_pid(sk); |
327 | ||
af6bcd82 GP |
328 | sk->sk_max_ack_backlog = backlog; |
329 | sk->sk_ack_backlog = 0; | |
89bc500e | 330 | |
abe84903 JH |
331 | /* Listening channels need to use nested locking in order not to |
332 | * cause lockdep warnings when the created child channels end up | |
333 | * being locked in the same thread as the parent channel. | |
334 | */ | |
335 | atomic_set(&chan->nesting, L2CAP_NESTING_PARENT); | |
336 | ||
89bc500e | 337 | chan->state = BT_LISTEN; |
af6bcd82 GP |
338 | sk->sk_state = BT_LISTEN; |
339 | ||
340 | done: | |
341 | release_sock(sk); | |
342 | return err; | |
343 | } | |
344 | ||
2d792818 | 345 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, |
cdfbabfb | 346 | int flags, bool kern) |
c47b7c72 | 347 | { |
dfb2fae7 | 348 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
c47b7c72 GP |
349 | struct sock *sk = sock->sk, *nsk; |
350 | long timeo; | |
351 | int err = 0; | |
352 | ||
3b2ab39e | 353 | lock_sock_nested(sk, L2CAP_NESTING_PARENT); |
c47b7c72 | 354 | |
c47b7c72 GP |
355 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
356 | ||
357 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
358 | ||
359 | /* Wait for an incoming connection. (wake-one). */ | |
360 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 361 | while (1) { |
f9a3c20a PH |
362 | if (sk->sk_state != BT_LISTEN) { |
363 | err = -EBADFD; | |
c47b7c72 GP |
364 | break; |
365 | } | |
366 | ||
f9a3c20a PH |
367 | nsk = bt_accept_dequeue(sk, newsock); |
368 | if (nsk) | |
369 | break; | |
c47b7c72 | 370 | |
f9a3c20a PH |
371 | if (!timeo) { |
372 | err = -EAGAIN; | |
c47b7c72 GP |
373 | break; |
374 | } | |
375 | ||
376 | if (signal_pending(current)) { | |
377 | err = sock_intr_errno(timeo); | |
378 | break; | |
379 | } | |
f9a3c20a PH |
380 | |
381 | release_sock(sk); | |
dfb2fae7 PH |
382 | |
383 | timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); | |
384 | ||
3b2ab39e | 385 | lock_sock_nested(sk, L2CAP_NESTING_PARENT); |
c47b7c72 | 386 | } |
c47b7c72 GP |
387 | remove_wait_queue(sk_sleep(sk), &wait); |
388 | ||
389 | if (err) | |
390 | goto done; | |
391 | ||
392 | newsock->state = SS_CONNECTED; | |
393 | ||
394 | BT_DBG("new socket %p", nsk); | |
395 | ||
396 | done: | |
397 | release_sock(sk); | |
398 | return err; | |
399 | } | |
400 | ||
2d792818 | 401 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, |
9b2c45d4 | 402 | int peer) |
d7175d55 GP |
403 | { |
404 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
405 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 406 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
407 | |
408 | BT_DBG("sock %p, sk %p", sock, sk); | |
409 | ||
e8b1ab9e | 410 | if (peer && sk->sk_state != BT_CONNECTED && |
bf19d51b JH |
411 | sk->sk_state != BT_CONNECT && sk->sk_state != BT_CONNECT2 && |
412 | sk->sk_state != BT_CONFIG) | |
b783fbc3 JH |
413 | return -ENOTCONN; |
414 | ||
792039c7 | 415 | memset(la, 0, sizeof(struct sockaddr_l2)); |
d7175d55 | 416 | addr->sa_family = AF_BLUETOOTH; |
d7175d55 | 417 | |
d7e5e76b JH |
418 | la->l2_psm = chan->psm; |
419 | ||
d7175d55 | 420 | if (peer) { |
7eafc59e | 421 | bacpy(&la->l2_bdaddr, &chan->dst); |
fe4128e0 | 422 | la->l2_cid = cpu_to_le16(chan->dcid); |
4f1654e0 | 423 | la->l2_bdaddr_type = chan->dst_type; |
d7175d55 | 424 | } else { |
7eafc59e | 425 | bacpy(&la->l2_bdaddr, &chan->src); |
fe4128e0 | 426 | la->l2_cid = cpu_to_le16(chan->scid); |
4f1654e0 | 427 | la->l2_bdaddr_type = chan->src_type; |
d7175d55 GP |
428 | } |
429 | ||
9b2c45d4 | 430 | return sizeof(struct sockaddr_l2); |
d7175d55 GP |
431 | } |
432 | ||
3ee7b7cd LAD |
433 | static int l2cap_get_mode(struct l2cap_chan *chan) |
434 | { | |
435 | switch (chan->mode) { | |
436 | case L2CAP_MODE_BASIC: | |
437 | return BT_MODE_BASIC; | |
438 | case L2CAP_MODE_ERTM: | |
439 | return BT_MODE_ERTM; | |
440 | case L2CAP_MODE_STREAMING: | |
441 | return BT_MODE_STREAMING; | |
442 | case L2CAP_MODE_LE_FLOWCTL: | |
443 | return BT_MODE_LE_FLOWCTL; | |
444 | case L2CAP_MODE_EXT_FLOWCTL: | |
445 | return BT_MODE_EXT_FLOWCTL; | |
446 | } | |
447 | ||
448 | return -EINVAL; | |
449 | } | |
450 | ||
2d792818 GP |
451 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, |
452 | char __user *optval, int __user *optlen) | |
99f4808d GP |
453 | { |
454 | struct sock *sk = sock->sk; | |
4343478f | 455 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
456 | struct l2cap_options opts; |
457 | struct l2cap_conninfo cinfo; | |
458 | int len, err = 0; | |
459 | u32 opt; | |
460 | ||
461 | BT_DBG("sk %p", sk); | |
462 | ||
463 | if (get_user(len, optlen)) | |
464 | return -EFAULT; | |
465 | ||
466 | lock_sock(sk); | |
467 | ||
468 | switch (optname) { | |
469 | case L2CAP_OPTIONS: | |
64b4f8dc JH |
470 | /* LE sockets should use BT_SNDMTU/BT_RCVMTU, but since |
471 | * legacy ATT code depends on getsockopt for | |
472 | * L2CAP_OPTIONS we need to let this pass. | |
473 | */ | |
474 | if (bdaddr_type_is_le(chan->src_type) && | |
475 | chan->scid != L2CAP_CID_ATT) { | |
476 | err = -EINVAL; | |
477 | break; | |
478 | } | |
479 | ||
b86b0b15 LAD |
480 | /* Only BR/EDR modes are supported here */ |
481 | switch (chan->mode) { | |
482 | case L2CAP_MODE_BASIC: | |
483 | case L2CAP_MODE_ERTM: | |
484 | case L2CAP_MODE_STREAMING: | |
485 | break; | |
486 | default: | |
487 | err = -EINVAL; | |
488 | break; | |
489 | } | |
490 | ||
491 | if (err < 0) | |
492 | break; | |
493 | ||
e3fb592b | 494 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
495 | opts.imtu = chan->imtu; |
496 | opts.omtu = chan->omtu; | |
497 | opts.flush_to = chan->flush_to; | |
498 | opts.mode = chan->mode; | |
47d1ec61 GP |
499 | opts.fcs = chan->fcs; |
500 | opts.max_tx = chan->max_tx; | |
6327eb98 | 501 | opts.txwin_size = chan->tx_win; |
99f4808d | 502 | |
15f02b91 LAD |
503 | BT_DBG("mode 0x%2.2x", chan->mode); |
504 | ||
99f4808d GP |
505 | len = min_t(unsigned int, len, sizeof(opts)); |
506 | if (copy_to_user(optval, (char *) &opts, len)) | |
507 | err = -EFAULT; | |
508 | ||
509 | break; | |
510 | ||
511 | case L2CAP_LM: | |
4343478f | 512 | switch (chan->sec_level) { |
99f4808d GP |
513 | case BT_SECURITY_LOW: |
514 | opt = L2CAP_LM_AUTH; | |
515 | break; | |
516 | case BT_SECURITY_MEDIUM: | |
517 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
518 | break; | |
519 | case BT_SECURITY_HIGH: | |
520 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2d792818 | 521 | L2CAP_LM_SECURE; |
99f4808d | 522 | break; |
7d513e92 MH |
523 | case BT_SECURITY_FIPS: |
524 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
525 | L2CAP_LM_SECURE | L2CAP_LM_FIPS; | |
526 | break; | |
99f4808d GP |
527 | default: |
528 | opt = 0; | |
529 | break; | |
530 | } | |
531 | ||
43bd0f32 | 532 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
533 | opt |= L2CAP_LM_MASTER; |
534 | ||
ecf61bdb | 535 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
536 | opt |= L2CAP_LM_RELIABLE; |
537 | ||
538 | if (put_user(opt, (u32 __user *) optval)) | |
539 | err = -EFAULT; | |
7d513e92 | 540 | |
99f4808d GP |
541 | break; |
542 | ||
543 | case L2CAP_CONNINFO: | |
544 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
545 | !(sk->sk_state == BT_CONNECT2 && |
546 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
547 | err = -ENOTCONN; |
548 | break; | |
549 | } | |
550 | ||
8d03e971 | 551 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
552 | cinfo.hci_handle = chan->conn->hcon->handle; |
553 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
554 | |
555 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
556 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
557 | err = -EFAULT; | |
558 | ||
559 | break; | |
560 | ||
561 | default: | |
562 | err = -ENOPROTOOPT; | |
563 | break; | |
564 | } | |
565 | ||
566 | release_sock(sk); | |
567 | return err; | |
568 | } | |
569 | ||
2d792818 GP |
570 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, |
571 | char __user *optval, int __user *optlen) | |
99f4808d GP |
572 | { |
573 | struct sock *sk = sock->sk; | |
4343478f | 574 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 575 | struct bt_security sec; |
14b12d0b | 576 | struct bt_power pwr; |
eab2404b | 577 | u32 phys; |
3ee7b7cd | 578 | int len, mode, err = 0; |
99f4808d GP |
579 | |
580 | BT_DBG("sk %p", sk); | |
581 | ||
582 | if (level == SOL_L2CAP) | |
583 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
584 | ||
585 | if (level != SOL_BLUETOOTH) | |
586 | return -ENOPROTOOPT; | |
587 | ||
588 | if (get_user(len, optlen)) | |
589 | return -EFAULT; | |
590 | ||
591 | lock_sock(sk); | |
592 | ||
593 | switch (optname) { | |
594 | case BT_SECURITY: | |
715ec005 | 595 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
e0c888ad | 596 | chan->chan_type != L2CAP_CHAN_FIXED && |
2d792818 | 597 | chan->chan_type != L2CAP_CHAN_RAW) { |
99f4808d GP |
598 | err = -EINVAL; |
599 | break; | |
600 | } | |
601 | ||
8f360119 | 602 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 603 | if (chan->conn) { |
c6585a4d | 604 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 605 | |
85e34368 AE |
606 | if (sk->sk_state == BT_CONNECTED) |
607 | sec.key_size = chan->conn->hcon->enc_key_size; | |
608 | } else { | |
609 | sec.level = chan->sec_level; | |
610 | } | |
8f360119 | 611 | |
99f4808d GP |
612 | len = min_t(unsigned int, len, sizeof(sec)); |
613 | if (copy_to_user(optval, (char *) &sec, len)) | |
614 | err = -EFAULT; | |
615 | ||
616 | break; | |
617 | ||
618 | case BT_DEFER_SETUP: | |
619 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
620 | err = -EINVAL; | |
621 | break; | |
622 | } | |
623 | ||
c5daa683 GP |
624 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
625 | (u32 __user *) optval)) | |
99f4808d GP |
626 | err = -EFAULT; |
627 | ||
628 | break; | |
629 | ||
630 | case BT_FLUSHABLE: | |
d57b0e8b | 631 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
2d792818 | 632 | (u32 __user *) optval)) |
99f4808d GP |
633 | err = -EFAULT; |
634 | ||
635 | break; | |
636 | ||
14b12d0b JG |
637 | case BT_POWER: |
638 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
2d792818 | 639 | && sk->sk_type != SOCK_RAW) { |
14b12d0b JG |
640 | err = -EINVAL; |
641 | break; | |
642 | } | |
643 | ||
15770b1a | 644 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
645 | |
646 | len = min_t(unsigned int, len, sizeof(pwr)); | |
647 | if (copy_to_user(optval, (char *) &pwr, len)) | |
648 | err = -EFAULT; | |
649 | ||
650 | break; | |
651 | ||
2ea66482 | 652 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
653 | if (put_user(chan->chan_policy, (u32 __user *) optval)) |
654 | err = -EFAULT; | |
655 | break; | |
656 | ||
1f435424 | 657 | case BT_SNDMTU: |
1f435424 JH |
658 | if (!bdaddr_type_is_le(chan->src_type)) { |
659 | err = -EINVAL; | |
660 | break; | |
661 | } | |
662 | ||
663 | if (sk->sk_state != BT_CONNECTED) { | |
664 | err = -ENOTCONN; | |
665 | break; | |
666 | } | |
667 | ||
668 | if (put_user(chan->omtu, (u16 __user *) optval)) | |
669 | err = -EFAULT; | |
670 | break; | |
671 | ||
672 | case BT_RCVMTU: | |
1f435424 JH |
673 | if (!bdaddr_type_is_le(chan->src_type)) { |
674 | err = -EINVAL; | |
675 | break; | |
676 | } | |
677 | ||
678 | if (put_user(chan->imtu, (u16 __user *) optval)) | |
679 | err = -EFAULT; | |
680 | break; | |
681 | ||
eab2404b | 682 | case BT_PHY: |
a2a8b0b4 | 683 | if (sk->sk_state != BT_CONNECTED) { |
eab2404b LAD |
684 | err = -ENOTCONN; |
685 | break; | |
686 | } | |
687 | ||
688 | phys = hci_conn_get_phy(chan->conn->hcon); | |
689 | ||
690 | if (put_user(phys, (u32 __user *) optval)) | |
691 | err = -EFAULT; | |
692 | break; | |
693 | ||
3ee7b7cd LAD |
694 | case BT_MODE: |
695 | if (!enable_ecred) { | |
696 | err = -ENOPROTOOPT; | |
697 | break; | |
698 | } | |
699 | ||
700 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { | |
701 | err = -EINVAL; | |
702 | break; | |
703 | } | |
704 | ||
705 | mode = l2cap_get_mode(chan); | |
706 | if (mode < 0) { | |
707 | err = mode; | |
708 | break; | |
709 | } | |
710 | ||
711 | if (put_user(mode, (u8 __user *) optval)) | |
712 | err = -EFAULT; | |
713 | break; | |
714 | ||
99f4808d GP |
715 | default: |
716 | err = -ENOPROTOOPT; | |
717 | break; | |
718 | } | |
719 | ||
720 | release_sock(sk); | |
721 | return err; | |
722 | } | |
723 | ||
682877c3 AG |
724 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
725 | { | |
726 | switch (chan->scid) { | |
073d1cf3 | 727 | case L2CAP_CID_ATT: |
8c3a4f00 | 728 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
729 | return false; |
730 | break; | |
731 | ||
732 | default: | |
733 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
734 | return false; | |
735 | } | |
736 | ||
737 | return true; | |
738 | } | |
739 | ||
2d792818 | 740 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, |
a7b75c5a | 741 | sockptr_t optval, unsigned int optlen) |
33575df7 GP |
742 | { |
743 | struct sock *sk = sock->sk; | |
b4450035 | 744 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
745 | struct l2cap_options opts; |
746 | int len, err = 0; | |
747 | u32 opt; | |
748 | ||
749 | BT_DBG("sk %p", sk); | |
750 | ||
751 | lock_sock(sk); | |
752 | ||
753 | switch (optname) { | |
754 | case L2CAP_OPTIONS: | |
64b4f8dc JH |
755 | if (bdaddr_type_is_le(chan->src_type)) { |
756 | err = -EINVAL; | |
757 | break; | |
758 | } | |
759 | ||
33575df7 GP |
760 | if (sk->sk_state == BT_CONNECTED) { |
761 | err = -EINVAL; | |
762 | break; | |
763 | } | |
764 | ||
0c1bc5c6 GP |
765 | opts.imtu = chan->imtu; |
766 | opts.omtu = chan->omtu; | |
767 | opts.flush_to = chan->flush_to; | |
768 | opts.mode = chan->mode; | |
47d1ec61 GP |
769 | opts.fcs = chan->fcs; |
770 | opts.max_tx = chan->max_tx; | |
6327eb98 | 771 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
772 | |
773 | len = min_t(unsigned int, sizeof(opts), optlen); | |
a7b75c5a | 774 | if (copy_from_sockptr(&opts, optval, len)) { |
33575df7 GP |
775 | err = -EFAULT; |
776 | break; | |
777 | } | |
778 | ||
6327eb98 | 779 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
780 | err = -EINVAL; |
781 | break; | |
782 | } | |
783 | ||
682877c3 AG |
784 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
785 | err = -EINVAL; | |
786 | break; | |
787 | } | |
788 | ||
b86b0b15 LAD |
789 | /* Only BR/EDR modes are supported here */ |
790 | switch (opts.mode) { | |
33575df7 | 791 | case L2CAP_MODE_BASIC: |
c1360a1c | 792 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
793 | break; |
794 | case L2CAP_MODE_ERTM: | |
795 | case L2CAP_MODE_STREAMING: | |
796 | if (!disable_ertm) | |
797 | break; | |
19186c7b | 798 | fallthrough; |
33575df7 GP |
799 | default: |
800 | err = -EINVAL; | |
801 | break; | |
802 | } | |
803 | ||
b86b0b15 LAD |
804 | if (err < 0) |
805 | break; | |
806 | ||
807 | chan->mode = opts.mode; | |
808 | ||
15f02b91 LAD |
809 | BT_DBG("mode 0x%2.2x", chan->mode); |
810 | ||
0c1bc5c6 GP |
811 | chan->imtu = opts.imtu; |
812 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
813 | chan->fcs = opts.fcs; |
814 | chan->max_tx = opts.max_tx; | |
6327eb98 | 815 | chan->tx_win = opts.txwin_size; |
12d59781 | 816 | chan->flush_to = opts.flush_to; |
33575df7 GP |
817 | break; |
818 | ||
819 | case L2CAP_LM: | |
a7b75c5a | 820 | if (copy_from_sockptr(&opt, optval, sizeof(u32))) { |
33575df7 GP |
821 | err = -EFAULT; |
822 | break; | |
823 | } | |
824 | ||
7d513e92 MH |
825 | if (opt & L2CAP_LM_FIPS) { |
826 | err = -EINVAL; | |
827 | break; | |
828 | } | |
829 | ||
33575df7 | 830 | if (opt & L2CAP_LM_AUTH) |
4343478f | 831 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 832 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 833 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 834 | if (opt & L2CAP_LM_SECURE) |
4343478f | 835 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 836 | |
43bd0f32 AE |
837 | if (opt & L2CAP_LM_MASTER) |
838 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
839 | else | |
840 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
841 | |
842 | if (opt & L2CAP_LM_RELIABLE) | |
843 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
844 | else | |
845 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
846 | break; |
847 | ||
848 | default: | |
849 | err = -ENOPROTOOPT; | |
850 | break; | |
851 | } | |
852 | ||
853 | release_sock(sk); | |
854 | return err; | |
855 | } | |
856 | ||
3ee7b7cd LAD |
857 | static int l2cap_set_mode(struct l2cap_chan *chan, u8 mode) |
858 | { | |
859 | switch (mode) { | |
860 | case BT_MODE_BASIC: | |
861 | if (bdaddr_type_is_le(chan->src_type)) | |
862 | return -EINVAL; | |
863 | mode = L2CAP_MODE_BASIC; | |
864 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); | |
865 | break; | |
866 | case BT_MODE_ERTM: | |
867 | if (!disable_ertm || bdaddr_type_is_le(chan->src_type)) | |
868 | return -EINVAL; | |
869 | mode = L2CAP_MODE_ERTM; | |
870 | break; | |
871 | case BT_MODE_STREAMING: | |
872 | if (!disable_ertm || bdaddr_type_is_le(chan->src_type)) | |
873 | return -EINVAL; | |
874 | mode = L2CAP_MODE_STREAMING; | |
875 | break; | |
876 | case BT_MODE_LE_FLOWCTL: | |
877 | if (!bdaddr_type_is_le(chan->src_type)) | |
878 | return -EINVAL; | |
879 | mode = L2CAP_MODE_LE_FLOWCTL; | |
880 | break; | |
881 | case BT_MODE_EXT_FLOWCTL: | |
882 | /* TODO: Add support for ECRED PDUs to BR/EDR */ | |
883 | if (!bdaddr_type_is_le(chan->src_type)) | |
884 | return -EINVAL; | |
885 | mode = L2CAP_MODE_EXT_FLOWCTL; | |
886 | break; | |
887 | default: | |
888 | return -EINVAL; | |
889 | } | |
890 | ||
891 | chan->mode = mode; | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
2d792818 | 896 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, |
a7b75c5a | 897 | sockptr_t optval, unsigned int optlen) |
33575df7 GP |
898 | { |
899 | struct sock *sk = sock->sk; | |
4343478f | 900 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 901 | struct bt_security sec; |
14b12d0b | 902 | struct bt_power pwr; |
f1cb9af5 | 903 | struct l2cap_conn *conn; |
33575df7 GP |
904 | int len, err = 0; |
905 | u32 opt; | |
163ea6e2 DC |
906 | u16 mtu; |
907 | u8 mode; | |
33575df7 GP |
908 | |
909 | BT_DBG("sk %p", sk); | |
910 | ||
911 | if (level == SOL_L2CAP) | |
912 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
913 | ||
914 | if (level != SOL_BLUETOOTH) | |
915 | return -ENOPROTOOPT; | |
916 | ||
917 | lock_sock(sk); | |
918 | ||
919 | switch (optname) { | |
920 | case BT_SECURITY: | |
715ec005 | 921 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
e0c888ad | 922 | chan->chan_type != L2CAP_CHAN_FIXED && |
2d792818 | 923 | chan->chan_type != L2CAP_CHAN_RAW) { |
33575df7 GP |
924 | err = -EINVAL; |
925 | break; | |
926 | } | |
927 | ||
928 | sec.level = BT_SECURITY_LOW; | |
929 | ||
930 | len = min_t(unsigned int, sizeof(sec), optlen); | |
a7b75c5a | 931 | if (copy_from_sockptr(&sec, optval, len)) { |
33575df7 GP |
932 | err = -EFAULT; |
933 | break; | |
934 | } | |
935 | ||
936 | if (sec.level < BT_SECURITY_LOW || | |
a164cee1 | 937 | sec.level > BT_SECURITY_FIPS) { |
33575df7 GP |
938 | err = -EINVAL; |
939 | break; | |
940 | } | |
941 | ||
4343478f | 942 | chan->sec_level = sec.level; |
f1cb9af5 | 943 | |
0bee1d60 GP |
944 | if (!chan->conn) |
945 | break; | |
946 | ||
f1cb9af5 | 947 | conn = chan->conn; |
0bee1d60 | 948 | |
bbb69b37 | 949 | /* change security for LE channels */ |
073d1cf3 | 950 | if (chan->scid == L2CAP_CID_ATT) { |
bbb69b37 FD |
951 | if (smp_conn_security(conn->hcon, sec.level)) { |
952 | err = -EINVAL; | |
f1cb9af5 | 953 | break; |
bbb69b37 FD |
954 | } |
955 | ||
d52deb17 | 956 | set_bit(FLAG_PENDING_SECURITY, &chan->flags); |
f1cb9af5 | 957 | sk->sk_state = BT_CONFIG; |
3542b854 | 958 | chan->state = BT_CONFIG; |
0bee1d60 | 959 | |
a7d7723a GP |
960 | /* or for ACL link */ |
961 | } else if ((sk->sk_state == BT_CONNECT2 && | |
2d792818 | 962 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a | 963 | sk->sk_state == BT_CONNECTED) { |
e7cafc45 | 964 | if (!l2cap_chan_check_security(chan, true)) |
c5daa683 | 965 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
966 | else |
967 | sk->sk_state_change(sk); | |
0bee1d60 GP |
968 | } else { |
969 | err = -EINVAL; | |
f1cb9af5 | 970 | } |
33575df7 GP |
971 | break; |
972 | ||
973 | case BT_DEFER_SETUP: | |
974 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
975 | err = -EINVAL; | |
976 | break; | |
977 | } | |
978 | ||
a7b75c5a | 979 | if (copy_from_sockptr(&opt, optval, sizeof(u32))) { |
33575df7 GP |
980 | err = -EFAULT; |
981 | break; | |
982 | } | |
983 | ||
bdc25783 | 984 | if (opt) { |
c5daa683 | 985 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
986 | set_bit(FLAG_DEFER_SETUP, &chan->flags); |
987 | } else { | |
c5daa683 | 988 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
989 | clear_bit(FLAG_DEFER_SETUP, &chan->flags); |
990 | } | |
33575df7 GP |
991 | break; |
992 | ||
993 | case BT_FLUSHABLE: | |
a7b75c5a | 994 | if (copy_from_sockptr(&opt, optval, sizeof(u32))) { |
33575df7 GP |
995 | err = -EFAULT; |
996 | break; | |
997 | } | |
998 | ||
999 | if (opt > BT_FLUSHABLE_ON) { | |
1000 | err = -EINVAL; | |
1001 | break; | |
1002 | } | |
1003 | ||
1004 | if (opt == BT_FLUSHABLE_OFF) { | |
c1f23a2b | 1005 | conn = chan->conn; |
25985edc | 1006 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
1007 | No Flush support in the LM */ |
1008 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
1009 | err = -EINVAL; | |
1010 | break; | |
1011 | } | |
1012 | } | |
1013 | ||
d57b0e8b AE |
1014 | if (opt) |
1015 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
1016 | else | |
1017 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
1018 | break; |
1019 | ||
14b12d0b JG |
1020 | case BT_POWER: |
1021 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
2d792818 | 1022 | chan->chan_type != L2CAP_CHAN_RAW) { |
14b12d0b JG |
1023 | err = -EINVAL; |
1024 | break; | |
1025 | } | |
1026 | ||
1027 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
1028 | ||
1029 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
a7b75c5a | 1030 | if (copy_from_sockptr(&pwr, optval, len)) { |
14b12d0b JG |
1031 | err = -EFAULT; |
1032 | break; | |
1033 | } | |
15770b1a AE |
1034 | |
1035 | if (pwr.force_active) | |
1036 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
1037 | else | |
1038 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
1039 | break; |
1040 | ||
2ea66482 | 1041 | case BT_CHANNEL_POLICY: |
a7b75c5a | 1042 | if (copy_from_sockptr(&opt, optval, sizeof(u32))) { |
2ea66482 MM |
1043 | err = -EFAULT; |
1044 | break; | |
1045 | } | |
1046 | ||
1047 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
1048 | err = -EINVAL; | |
1049 | break; | |
1050 | } | |
1051 | ||
1052 | if (chan->mode != L2CAP_MODE_ERTM && | |
2d792818 | 1053 | chan->mode != L2CAP_MODE_STREAMING) { |
2ea66482 MM |
1054 | err = -EOPNOTSUPP; |
1055 | break; | |
1056 | } | |
1057 | ||
1058 | chan->chan_policy = (u8) opt; | |
3f7a56c4 MM |
1059 | |
1060 | if (sk->sk_state == BT_CONNECTED && | |
1061 | chan->move_role == L2CAP_MOVE_ROLE_NONE) | |
1062 | l2cap_move_start(chan); | |
1063 | ||
14b12d0b JG |
1064 | break; |
1065 | ||
1f435424 | 1066 | case BT_SNDMTU: |
1f435424 JH |
1067 | if (!bdaddr_type_is_le(chan->src_type)) { |
1068 | err = -EINVAL; | |
1069 | break; | |
1070 | } | |
1071 | ||
1072 | /* Setting is not supported as it's the remote side that | |
1073 | * decides this. | |
1074 | */ | |
1075 | err = -EPERM; | |
1076 | break; | |
1077 | ||
1078 | case BT_RCVMTU: | |
1f435424 JH |
1079 | if (!bdaddr_type_is_le(chan->src_type)) { |
1080 | err = -EINVAL; | |
1081 | break; | |
1082 | } | |
1083 | ||
15f02b91 LAD |
1084 | if (chan->mode == L2CAP_MODE_LE_FLOWCTL && |
1085 | sk->sk_state == BT_CONNECTED) { | |
1f435424 JH |
1086 | err = -EISCONN; |
1087 | break; | |
1088 | } | |
1089 | ||
163ea6e2 | 1090 | if (copy_from_sockptr(&mtu, optval, sizeof(u16))) { |
1f435424 JH |
1091 | err = -EFAULT; |
1092 | break; | |
1093 | } | |
1094 | ||
15f02b91 LAD |
1095 | if (chan->mode == L2CAP_MODE_EXT_FLOWCTL && |
1096 | sk->sk_state == BT_CONNECTED) | |
163ea6e2 | 1097 | err = l2cap_chan_reconfigure(chan, mtu); |
15f02b91 | 1098 | else |
163ea6e2 | 1099 | chan->imtu = mtu; |
15f02b91 | 1100 | |
1f435424 JH |
1101 | break; |
1102 | ||
3ee7b7cd LAD |
1103 | case BT_MODE: |
1104 | if (!enable_ecred) { | |
1105 | err = -ENOPROTOOPT; | |
1106 | break; | |
1107 | } | |
1108 | ||
1109 | BT_DBG("sk->sk_state %u", sk->sk_state); | |
1110 | ||
1111 | if (sk->sk_state != BT_BOUND) { | |
1112 | err = -EINVAL; | |
1113 | break; | |
1114 | } | |
1115 | ||
1116 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { | |
1117 | err = -EINVAL; | |
1118 | break; | |
1119 | } | |
1120 | ||
163ea6e2 | 1121 | if (copy_from_sockptr(&mode, optval, sizeof(u8))) { |
3ee7b7cd LAD |
1122 | err = -EFAULT; |
1123 | break; | |
1124 | } | |
1125 | ||
163ea6e2 | 1126 | BT_DBG("mode %u", mode); |
3ee7b7cd | 1127 | |
163ea6e2 | 1128 | err = l2cap_set_mode(chan, mode); |
3ee7b7cd LAD |
1129 | if (err) |
1130 | break; | |
1131 | ||
1132 | BT_DBG("mode 0x%2.2x", chan->mode); | |
1133 | ||
1134 | break; | |
1135 | ||
33575df7 GP |
1136 | default: |
1137 | err = -ENOPROTOOPT; | |
1138 | break; | |
1139 | } | |
1140 | ||
1141 | release_sock(sk); | |
1142 | return err; | |
1143 | } | |
fd83ccdb | 1144 | |
1b784140 YX |
1145 | static int l2cap_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
1146 | size_t len) | |
fd83ccdb GP |
1147 | { |
1148 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 1149 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
1150 | int err; |
1151 | ||
1152 | BT_DBG("sock %p, sk %p", sock, sk); | |
1153 | ||
1154 | err = sock_error(sk); | |
1155 | if (err) | |
1156 | return err; | |
1157 | ||
1158 | if (msg->msg_flags & MSG_OOB) | |
1159 | return -EOPNOTSUPP; | |
1160 | ||
a6a5568c | 1161 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 1162 | return -ENOTCONN; |
fd83ccdb | 1163 | |
e793dcf0 JH |
1164 | lock_sock(sk); |
1165 | err = bt_sock_wait_ready(sk, msg->msg_flags); | |
1166 | release_sock(sk); | |
1167 | if (err) | |
1168 | return err; | |
1169 | ||
a6a5568c | 1170 | l2cap_chan_lock(chan); |
8d46321c | 1171 | err = l2cap_chan_send(chan, msg, len); |
a6a5568c | 1172 | l2cap_chan_unlock(chan); |
fd83ccdb | 1173 | |
fd83ccdb GP |
1174 | return err; |
1175 | } | |
33575df7 | 1176 | |
1b784140 YX |
1177 | static int l2cap_sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1178 | size_t len, int flags) | |
68983259 GP |
1179 | { |
1180 | struct sock *sk = sock->sk; | |
e328140f MM |
1181 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
1182 | int err; | |
68983259 GP |
1183 | |
1184 | lock_sock(sk); | |
1185 | ||
c5daa683 GP |
1186 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
1187 | &bt_sk(sk)->flags)) { | |
15f02b91 LAD |
1188 | if (pi->chan->mode == L2CAP_MODE_EXT_FLOWCTL) { |
1189 | sk->sk_state = BT_CONNECTED; | |
1190 | pi->chan->state = BT_CONNECTED; | |
1191 | __l2cap_ecred_conn_rsp_defer(pi->chan); | |
b354e6c1 | 1192 | } else if (bdaddr_type_is_le(pi->chan->src_type)) { |
38319713 JH |
1193 | sk->sk_state = BT_CONNECTED; |
1194 | pi->chan->state = BT_CONNECTED; | |
1195 | __l2cap_le_connect_rsp_defer(pi->chan); | |
1196 | } else { | |
1197 | sk->sk_state = BT_CONFIG; | |
1198 | pi->chan->state = BT_CONFIG; | |
1199 | __l2cap_connect_rsp_defer(pi->chan); | |
1200 | } | |
8c1d787b | 1201 | |
970871bc JH |
1202 | err = 0; |
1203 | goto done; | |
68983259 GP |
1204 | } |
1205 | ||
1206 | release_sock(sk); | |
1207 | ||
1208 | if (sock->type == SOCK_STREAM) | |
1b784140 | 1209 | err = bt_sock_stream_recvmsg(sock, msg, len, flags); |
e328140f | 1210 | else |
1b784140 | 1211 | err = bt_sock_recvmsg(sock, msg, len, flags); |
e328140f MM |
1212 | |
1213 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
1214 | return err; | |
1215 | ||
1216 | /* Attempt to put pending rx data in the socket buffer */ | |
1217 | ||
1218 | lock_sock(sk); | |
1219 | ||
1220 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
1221 | goto done; | |
1222 | ||
1223 | if (pi->rx_busy_skb) { | |
dbb50887 | 1224 | if (!__sock_queue_rcv_skb(sk, pi->rx_busy_skb)) |
e328140f MM |
1225 | pi->rx_busy_skb = NULL; |
1226 | else | |
1227 | goto done; | |
1228 | } | |
1229 | ||
1230 | /* Restore data flow when half of the receive buffer is | |
1231 | * available. This avoids resending large numbers of | |
1232 | * frames. | |
1233 | */ | |
1234 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
1235 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 1236 | |
e328140f MM |
1237 | done: |
1238 | release_sock(sk); | |
1239 | return err; | |
68983259 GP |
1240 | } |
1241 | ||
05fc1576 | 1242 | /* Kill socket (only if zapped and orphan) |
6c08fc89 | 1243 | * Must be called on unlocked socket, with l2cap channel lock. |
05fc1576 | 1244 | */ |
ba3bd0ee | 1245 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
1246 | { |
1247 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
1248 | return; | |
1249 | ||
e05dcc32 | 1250 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
1251 | |
1252 | /* Kill poor orphan */ | |
6ff5abbf | 1253 | |
4af66c69 | 1254 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
1255 | sock_set_flag(sk, SOCK_DEAD); |
1256 | sock_put(sk); | |
1257 | } | |
1258 | ||
f65468f6 | 1259 | static int __l2cap_wait_ack(struct sock *sk, struct l2cap_chan *chan) |
dc25306b | 1260 | { |
dc25306b GP |
1261 | DECLARE_WAITQUEUE(wait, current); |
1262 | int err = 0; | |
cb02a255 | 1263 | int timeo = L2CAP_WAIT_ACK_POLL_PERIOD; |
e432c72c DJ |
1264 | /* Timeout to prevent infinite loop */ |
1265 | unsigned long timeout = jiffies + L2CAP_WAIT_ACK_TIMEOUT; | |
dc25306b GP |
1266 | |
1267 | add_wait_queue(sk_sleep(sk), &wait); | |
1268 | set_current_state(TASK_INTERRUPTIBLE); | |
f65468f6 | 1269 | do { |
e432c72c DJ |
1270 | BT_DBG("Waiting for %d ACKs, timeout %04d ms", |
1271 | chan->unacked_frames, time_after(jiffies, timeout) ? 0 : | |
1272 | jiffies_to_msecs(timeout - jiffies)); | |
451e4c6c | 1273 | |
dc25306b | 1274 | if (!timeo) |
cb02a255 | 1275 | timeo = L2CAP_WAIT_ACK_POLL_PERIOD; |
dc25306b GP |
1276 | |
1277 | if (signal_pending(current)) { | |
1278 | err = sock_intr_errno(timeo); | |
1279 | break; | |
1280 | } | |
1281 | ||
1282 | release_sock(sk); | |
1283 | timeo = schedule_timeout(timeo); | |
1284 | lock_sock(sk); | |
1285 | set_current_state(TASK_INTERRUPTIBLE); | |
1286 | ||
1287 | err = sock_error(sk); | |
1288 | if (err) | |
1289 | break; | |
f65468f6 | 1290 | |
e432c72c DJ |
1291 | if (time_after(jiffies, timeout)) { |
1292 | err = -ENOLINK; | |
1293 | break; | |
1294 | } | |
1295 | ||
f65468f6 DJ |
1296 | } while (chan->unacked_frames > 0 && |
1297 | chan->state == BT_CONNECTED); | |
1298 | ||
dc25306b GP |
1299 | set_current_state(TASK_RUNNING); |
1300 | remove_wait_queue(sk_sleep(sk), &wait); | |
1301 | return err; | |
1302 | } | |
1303 | ||
dcba0dba GP |
1304 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1305 | { | |
1306 | struct sock *sk = sock->sk; | |
7ddb6e0f | 1307 | struct l2cap_chan *chan; |
3df91ea2 | 1308 | struct l2cap_conn *conn; |
dcba0dba GP |
1309 | int err = 0; |
1310 | ||
5b440676 AP |
1311 | BT_DBG("sock %p, sk %p, how %d", sock, sk, how); |
1312 | ||
1313 | /* 'how' parameter is mapped to sk_shutdown as follows: | |
1314 | * SHUT_RD (0) --> RCV_SHUTDOWN (1) | |
1315 | * SHUT_WR (1) --> SEND_SHUTDOWN (2) | |
1316 | * SHUT_RDWR (2) --> SHUTDOWN_MASK (3) | |
1317 | */ | |
1318 | how++; | |
dcba0dba GP |
1319 | |
1320 | if (!sk) | |
1321 | return 0; | |
1322 | ||
04ba72e6 DJ |
1323 | lock_sock(sk); |
1324 | ||
5b440676 | 1325 | if ((sk->sk_shutdown & how) == how) |
e7456437 DJ |
1326 | goto shutdown_already; |
1327 | ||
1328 | BT_DBG("Handling sock shutdown"); | |
1329 | ||
2baea85d DJ |
1330 | /* prevent sk structure from being freed whilst unlocked */ |
1331 | sock_hold(sk); | |
1332 | ||
7ddb6e0f | 1333 | chan = l2cap_pi(sk)->chan; |
2baea85d DJ |
1334 | /* prevent chan structure from being freed whilst unlocked */ |
1335 | l2cap_chan_hold(chan); | |
3df91ea2 | 1336 | |
49d11741 JH |
1337 | BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); |
1338 | ||
e7456437 DJ |
1339 | if (chan->mode == L2CAP_MODE_ERTM && |
1340 | chan->unacked_frames > 0 && | |
9f7378a9 | 1341 | chan->state == BT_CONNECTED) { |
e7456437 | 1342 | err = __l2cap_wait_ack(sk, chan); |
dcba0dba | 1343 | |
9f7378a9 DJ |
1344 | /* After waiting for ACKs, check whether shutdown |
1345 | * has already been actioned to close the L2CAP | |
1346 | * link such as by l2cap_disconnection_req(). | |
1347 | */ | |
5b440676 AP |
1348 | if ((sk->sk_shutdown & how) == how) |
1349 | goto shutdown_matched; | |
1350 | } | |
1351 | ||
1352 | /* Try setting the RCV_SHUTDOWN bit, return early if SEND_SHUTDOWN | |
1353 | * is already set | |
1354 | */ | |
1355 | if ((how & RCV_SHUTDOWN) && !(sk->sk_shutdown & RCV_SHUTDOWN)) { | |
1356 | sk->sk_shutdown |= RCV_SHUTDOWN; | |
1357 | if ((sk->sk_shutdown & how) == how) | |
1358 | goto shutdown_matched; | |
9f7378a9 DJ |
1359 | } |
1360 | ||
5b440676 | 1361 | sk->sk_shutdown |= SEND_SHUTDOWN; |
e7456437 | 1362 | release_sock(sk); |
04ba72e6 DJ |
1363 | |
1364 | l2cap_chan_lock(chan); | |
1365 | conn = chan->conn; | |
1366 | if (conn) | |
1367 | /* prevent conn structure from being freed */ | |
1368 | l2cap_conn_get(conn); | |
1369 | l2cap_chan_unlock(chan); | |
1370 | ||
1371 | if (conn) | |
1372 | /* mutex lock must be taken before l2cap_chan_lock() */ | |
1373 | mutex_lock(&conn->chan_lock); | |
1374 | ||
1375 | l2cap_chan_lock(chan); | |
e7456437 | 1376 | l2cap_chan_close(chan, 0); |
04ba72e6 DJ |
1377 | l2cap_chan_unlock(chan); |
1378 | ||
1379 | if (conn) { | |
1380 | mutex_unlock(&conn->chan_lock); | |
1381 | l2cap_conn_put(conn); | |
1382 | } | |
1383 | ||
e7456437 | 1384 | lock_sock(sk); |
dcba0dba | 1385 | |
e7456437 DJ |
1386 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime && |
1387 | !(current->flags & PF_EXITING)) | |
1388 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
1389 | sk->sk_lingertime); | |
dcba0dba | 1390 | |
5b440676 | 1391 | shutdown_matched: |
04ba72e6 DJ |
1392 | l2cap_chan_put(chan); |
1393 | sock_put(sk); | |
1394 | ||
1395 | shutdown_already: | |
dcba0dba GP |
1396 | if (!err && sk->sk_err) |
1397 | err = -sk->sk_err; | |
1398 | ||
1399 | release_sock(sk); | |
3df91ea2 | 1400 | |
04ba72e6 | 1401 | BT_DBG("Sock shutdown complete err: %d", err); |
451e4c6c | 1402 | |
dcba0dba GP |
1403 | return err; |
1404 | } | |
1405 | ||
554f05bb GP |
1406 | static int l2cap_sock_release(struct socket *sock) |
1407 | { | |
1408 | struct sock *sk = sock->sk; | |
1409 | int err; | |
2a154903 | 1410 | struct l2cap_chan *chan; |
554f05bb GP |
1411 | |
1412 | BT_DBG("sock %p, sk %p", sock, sk); | |
1413 | ||
1414 | if (!sk) | |
1415 | return 0; | |
1416 | ||
5b28d95c MY |
1417 | bt_sock_unlink(&l2cap_sk_list, sk); |
1418 | ||
5b440676 | 1419 | err = l2cap_sock_shutdown(sock, SHUT_RDWR); |
2a154903 | 1420 | chan = l2cap_pi(sk)->chan; |
554f05bb | 1421 | |
2a154903 HD |
1422 | l2cap_chan_hold(chan); |
1423 | l2cap_chan_lock(chan); | |
6c08fc89 | 1424 | |
554f05bb GP |
1425 | sock_orphan(sk); |
1426 | l2cap_sock_kill(sk); | |
6c08fc89 | 1427 | |
2a154903 HD |
1428 | l2cap_chan_unlock(chan); |
1429 | l2cap_chan_put(chan); | |
6c08fc89 | 1430 | |
554f05bb GP |
1431 | return err; |
1432 | } | |
1433 | ||
c0df7f6e AE |
1434 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
1435 | { | |
1436 | struct sock *sk; | |
1437 | ||
49d11741 JH |
1438 | BT_DBG("parent %p state %s", parent, |
1439 | state_to_string(parent->sk_state)); | |
c0df7f6e AE |
1440 | |
1441 | /* Close not yet accepted channels */ | |
1442 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
1443 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
1444 | ||
49d11741 JH |
1445 | BT_DBG("child chan %p state %s", chan, |
1446 | state_to_string(chan->state)); | |
1447 | ||
6c08fc89 | 1448 | l2cap_chan_hold(chan); |
c0df7f6e | 1449 | l2cap_chan_lock(chan); |
6c08fc89 | 1450 | |
c0df7f6e AE |
1451 | __clear_chan_timer(chan); |
1452 | l2cap_chan_close(chan, ECONNRESET); | |
c0df7f6e | 1453 | l2cap_sock_kill(sk); |
6c08fc89 MM |
1454 | |
1455 | l2cap_chan_unlock(chan); | |
1456 | l2cap_chan_put(chan); | |
c0df7f6e AE |
1457 | } |
1458 | } | |
1459 | ||
80b98027 | 1460 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 1461 | { |
80b98027 | 1462 | struct sock *sk, *parent = chan->data; |
80808e43 | 1463 | |
8ffb9290 GP |
1464 | lock_sock(parent); |
1465 | ||
53826692 GP |
1466 | /* Check for backlog size */ |
1467 | if (sk_acceptq_is_full(parent)) { | |
1468 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
8a96f3cd | 1469 | release_sock(parent); |
53826692 GP |
1470 | return NULL; |
1471 | } | |
1472 | ||
80808e43 | 1473 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
11aa9c28 | 1474 | GFP_ATOMIC, 0); |
8a96f3cd JT |
1475 | if (!sk) { |
1476 | release_sock(parent); | |
80808e43 | 1477 | return NULL; |
8a96f3cd | 1478 | } |
80808e43 | 1479 | |
d22015aa OP |
1480 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
1481 | ||
80808e43 GP |
1482 | l2cap_sock_init(sk, parent); |
1483 | ||
c4f5627f | 1484 | bt_accept_enqueue(parent, sk, false); |
644912e1 | 1485 | |
8ffb9290 GP |
1486 | release_sock(parent); |
1487 | ||
80808e43 GP |
1488 | return l2cap_pi(sk)->chan; |
1489 | } | |
1490 | ||
80b98027 | 1491 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 1492 | { |
80b98027 | 1493 | struct sock *sk = chan->data; |
84b34d98 | 1494 | int err; |
e328140f | 1495 | |
6be36555 AE |
1496 | lock_sock(sk); |
1497 | ||
84b34d98 | 1498 | if (l2cap_pi(sk)->rx_busy_skb) { |
6be36555 AE |
1499 | err = -ENOMEM; |
1500 | goto done; | |
1501 | } | |
e328140f | 1502 | |
dbb50887 DB |
1503 | if (chan->mode != L2CAP_MODE_ERTM && |
1504 | chan->mode != L2CAP_MODE_STREAMING) { | |
1505 | /* Even if no filter is attached, we could potentially | |
1506 | * get errors from security modules, etc. | |
1507 | */ | |
1508 | err = sk_filter(sk, skb); | |
1509 | if (err) | |
1510 | goto done; | |
1511 | } | |
1512 | ||
1513 | err = __sock_queue_rcv_skb(sk, skb); | |
e328140f MM |
1514 | |
1515 | /* For ERTM, handle one skb that doesn't fit into the recv | |
1516 | * buffer. This is important to do because the data frames | |
1517 | * have already been acked, so the skb cannot be discarded. | |
1518 | * | |
1519 | * Notify the l2cap core that the buffer is full, so the | |
1520 | * LOCAL_BUSY state is entered and no more frames are | |
1521 | * acked and reassembled until there is buffer space | |
1522 | * available. | |
1523 | */ | |
84b34d98 MH |
1524 | if (err < 0 && chan->mode == L2CAP_MODE_ERTM) { |
1525 | l2cap_pi(sk)->rx_busy_skb = skb; | |
1526 | l2cap_chan_busy(chan, 1); | |
e328140f MM |
1527 | err = 0; |
1528 | } | |
23070494 | 1529 | |
6be36555 AE |
1530 | done: |
1531 | release_sock(sk); | |
1532 | ||
e328140f | 1533 | return err; |
23070494 GP |
1534 | } |
1535 | ||
80b98027 | 1536 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 1537 | { |
80b98027 | 1538 | struct sock *sk = chan->data; |
ba3bd0ee | 1539 | |
ea4c054c WS |
1540 | if (!sk) |
1541 | return; | |
1542 | ||
ba3bd0ee GP |
1543 | l2cap_sock_kill(sk); |
1544 | } | |
1545 | ||
c0df7f6e AE |
1546 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
1547 | { | |
1548 | struct sock *sk = chan->data; | |
1549 | struct sock *parent; | |
1550 | ||
ea4c054c WS |
1551 | if (!sk) |
1552 | return; | |
1553 | ||
49d11741 JH |
1554 | BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); |
1555 | ||
3b2ab39e JH |
1556 | /* This callback can be called both for server (BT_LISTEN) |
1557 | * sockets as well as "normal" ones. To avoid lockdep warnings | |
1558 | * with child socket locking (through l2cap_sock_cleanup_listen) | |
1559 | * we need separation into separate nesting levels. The simplest | |
1560 | * way to accomplish this is to inherit the nesting level used | |
1561 | * for the channel. | |
1562 | */ | |
1563 | lock_sock_nested(sk, atomic_read(&chan->nesting)); | |
c0df7f6e AE |
1564 | |
1565 | parent = bt_sk(sk)->parent; | |
1566 | ||
c0df7f6e AE |
1567 | switch (chan->state) { |
1568 | case BT_OPEN: | |
1569 | case BT_BOUND: | |
1570 | case BT_CLOSED: | |
1571 | break; | |
1572 | case BT_LISTEN: | |
1573 | l2cap_sock_cleanup_listen(sk); | |
1574 | sk->sk_state = BT_CLOSED; | |
1575 | chan->state = BT_CLOSED; | |
1576 | ||
1577 | break; | |
1578 | default: | |
1579 | sk->sk_state = BT_CLOSED; | |
1580 | chan->state = BT_CLOSED; | |
1581 | ||
1582 | sk->sk_err = err; | |
1583 | ||
1584 | if (parent) { | |
1585 | bt_accept_unlink(sk); | |
676d2369 | 1586 | parent->sk_data_ready(parent); |
c0df7f6e AE |
1587 | } else { |
1588 | sk->sk_state_change(sk); | |
1589 | } | |
1590 | ||
1591 | break; | |
1592 | } | |
c0df7f6e | 1593 | release_sock(sk); |
20ae4089 APS |
1594 | |
1595 | /* Only zap after cleanup to avoid use after free race */ | |
1596 | sock_set_flag(sk, SOCK_ZAPPED); | |
1597 | ||
c0df7f6e AE |
1598 | } |
1599 | ||
53f52121 GP |
1600 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state, |
1601 | int err) | |
89bc500e | 1602 | { |
80b98027 | 1603 | struct sock *sk = chan->data; |
89bc500e GP |
1604 | |
1605 | sk->sk_state = state; | |
53f52121 GP |
1606 | |
1607 | if (err) | |
1608 | sk->sk_err = err; | |
89bc500e GP |
1609 | } |
1610 | ||
2f7719ce | 1611 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
d9fbd02b | 1612 | unsigned long hdr_len, |
90338947 | 1613 | unsigned long len, int nb) |
2f7719ce | 1614 | { |
0f2c6153 | 1615 | struct sock *sk = chan->data; |
90338947 GP |
1616 | struct sk_buff *skb; |
1617 | int err; | |
1618 | ||
a6a5568c | 1619 | l2cap_chan_unlock(chan); |
d9fbd02b | 1620 | skb = bt_skb_send_alloc(sk, hdr_len + len, nb, &err); |
a6a5568c MM |
1621 | l2cap_chan_lock(chan); |
1622 | ||
90338947 GP |
1623 | if (!skb) |
1624 | return ERR_PTR(err); | |
2f7719ce | 1625 | |
8d46321c MH |
1626 | skb->priority = sk->sk_priority; |
1627 | ||
a4368ff3 | 1628 | bt_cb(skb)->l2cap.chan = chan; |
0e790c64 | 1629 | |
90338947 | 1630 | return skb; |
2f7719ce AE |
1631 | } |
1632 | ||
54a59aa2 AE |
1633 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1634 | { | |
1635 | struct sock *sk = chan->data; | |
1636 | struct sock *parent; | |
1637 | ||
1638 | lock_sock(sk); | |
1639 | ||
1640 | parent = bt_sk(sk)->parent; | |
1641 | ||
1642 | BT_DBG("sk %p, parent %p", sk, parent); | |
1643 | ||
1644 | sk->sk_state = BT_CONNECTED; | |
1645 | sk->sk_state_change(sk); | |
1646 | ||
1647 | if (parent) | |
676d2369 | 1648 | parent->sk_data_ready(parent); |
54a59aa2 AE |
1649 | |
1650 | release_sock(sk); | |
1651 | } | |
1652 | ||
2dc4e510 GP |
1653 | static void l2cap_sock_defer_cb(struct l2cap_chan *chan) |
1654 | { | |
acdcabf5 GP |
1655 | struct sock *parent, *sk = chan->data; |
1656 | ||
1657 | lock_sock(sk); | |
2dc4e510 | 1658 | |
acdcabf5 | 1659 | parent = bt_sk(sk)->parent; |
2dc4e510 | 1660 | if (parent) |
676d2369 | 1661 | parent->sk_data_ready(parent); |
acdcabf5 GP |
1662 | |
1663 | release_sock(sk); | |
2dc4e510 GP |
1664 | } |
1665 | ||
d97c899b MH |
1666 | static void l2cap_sock_resume_cb(struct l2cap_chan *chan) |
1667 | { | |
1668 | struct sock *sk = chan->data; | |
1669 | ||
d52deb17 JH |
1670 | if (test_and_clear_bit(FLAG_PENDING_SECURITY, &chan->flags)) { |
1671 | sk->sk_state = BT_CONNECTED; | |
1672 | chan->state = BT_CONNECTED; | |
1673 | } | |
1674 | ||
d97c899b MH |
1675 | clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
1676 | sk->sk_state_change(sk); | |
1677 | } | |
1678 | ||
5ec1bbe5 GP |
1679 | static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan) |
1680 | { | |
1681 | struct sock *sk = chan->data; | |
1682 | ||
1683 | lock_sock(sk); | |
1684 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1685 | release_sock(sk); | |
1686 | } | |
1687 | ||
8d836d71 GP |
1688 | static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan) |
1689 | { | |
1690 | struct sock *sk = chan->data; | |
1691 | ||
1692 | return sk->sk_sndtimeo; | |
1693 | } | |
1694 | ||
b48596d1 LAD |
1695 | static struct pid *l2cap_sock_get_peer_pid_cb(struct l2cap_chan *chan) |
1696 | { | |
1697 | struct sock *sk = chan->data; | |
1698 | ||
1699 | return sk->sk_peer_pid; | |
1700 | } | |
1701 | ||
837776f7 JH |
1702 | static void l2cap_sock_suspend_cb(struct l2cap_chan *chan) |
1703 | { | |
1704 | struct sock *sk = chan->data; | |
1705 | ||
1706 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); | |
1707 | sk->sk_state_change(sk); | |
1708 | } | |
1709 | ||
f1942564 LAD |
1710 | static int l2cap_sock_filter(struct l2cap_chan *chan, struct sk_buff *skb) |
1711 | { | |
1712 | struct sock *sk = chan->data; | |
1713 | ||
1714 | switch (chan->mode) { | |
1715 | case L2CAP_MODE_ERTM: | |
1716 | case L2CAP_MODE_STREAMING: | |
1717 | return sk_filter(sk, skb); | |
1718 | } | |
1719 | ||
1720 | return 0; | |
1721 | } | |
1722 | ||
67f86a45 | 1723 | static const struct l2cap_ops l2cap_chan_ops = { |
0498878b JR |
1724 | .name = "L2CAP Socket Interface", |
1725 | .new_connection = l2cap_sock_new_connection_cb, | |
1726 | .recv = l2cap_sock_recv_cb, | |
1727 | .close = l2cap_sock_close_cb, | |
1728 | .teardown = l2cap_sock_teardown_cb, | |
1729 | .state_change = l2cap_sock_state_change_cb, | |
1730 | .ready = l2cap_sock_ready_cb, | |
1731 | .defer = l2cap_sock_defer_cb, | |
1732 | .resume = l2cap_sock_resume_cb, | |
1733 | .suspend = l2cap_sock_suspend_cb, | |
1734 | .set_shutdown = l2cap_sock_set_shutdown_cb, | |
1735 | .get_sndtimeo = l2cap_sock_get_sndtimeo_cb, | |
b48596d1 | 1736 | .get_peer_pid = l2cap_sock_get_peer_pid_cb, |
0498878b | 1737 | .alloc_skb = l2cap_sock_alloc_skb_cb, |
f1942564 | 1738 | .filter = l2cap_sock_filter, |
80808e43 GP |
1739 | }; |
1740 | ||
bb58f747 GP |
1741 | static void l2cap_sock_destruct(struct sock *sk) |
1742 | { | |
1743 | BT_DBG("sk %p", sk); | |
1744 | ||
ea4c054c WS |
1745 | if (l2cap_pi(sk)->chan) { |
1746 | l2cap_pi(sk)->chan->data = NULL; | |
23d3a869 | 1747 | l2cap_chan_put(l2cap_pi(sk)->chan); |
ea4c054c | 1748 | } |
84b34d98 | 1749 | |
e328140f MM |
1750 | if (l2cap_pi(sk)->rx_busy_skb) { |
1751 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1752 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1753 | } | |
1754 | ||
bb58f747 GP |
1755 | skb_queue_purge(&sk->sk_receive_queue); |
1756 | skb_queue_purge(&sk->sk_write_queue); | |
1757 | } | |
1758 | ||
2edf870d MH |
1759 | static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name, |
1760 | int *msg_namelen) | |
1761 | { | |
342dfc30 | 1762 | DECLARE_SOCKADDR(struct sockaddr_l2 *, la, msg_name); |
2edf870d MH |
1763 | |
1764 | memset(la, 0, sizeof(struct sockaddr_l2)); | |
1765 | la->l2_family = AF_BLUETOOTH; | |
a4368ff3 JH |
1766 | la->l2_psm = bt_cb(skb)->l2cap.psm; |
1767 | bacpy(&la->l2_bdaddr, &bt_cb(skb)->l2cap.bdaddr); | |
2edf870d MH |
1768 | |
1769 | *msg_namelen = sizeof(struct sockaddr_l2); | |
1770 | } | |
1771 | ||
80808e43 | 1772 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 | 1773 | { |
84b34d98 | 1774 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
bb58f747 GP |
1775 | |
1776 | BT_DBG("sk %p", sk); | |
1777 | ||
1778 | if (parent) { | |
b4450035 GP |
1779 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1780 | ||
bb58f747 | 1781 | sk->sk_type = parent->sk_type; |
c5daa683 | 1782 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1783 | |
715ec005 | 1784 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1785 | chan->imtu = pchan->imtu; |
1786 | chan->omtu = pchan->omtu; | |
b4450035 | 1787 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1788 | chan->mode = pchan->mode; |
47d1ec61 GP |
1789 | chan->fcs = pchan->fcs; |
1790 | chan->max_tx = pchan->max_tx; | |
1791 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1792 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1793 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1794 | chan->flags = pchan->flags; |
0cd75f7e JH |
1795 | chan->tx_credits = pchan->tx_credits; |
1796 | chan->rx_credits = pchan->rx_credits; | |
6230c9b4 | 1797 | |
7a8e5a31 JH |
1798 | if (chan->chan_type == L2CAP_CHAN_FIXED) { |
1799 | chan->scid = pchan->scid; | |
1800 | chan->dcid = pchan->scid; | |
1801 | } | |
1802 | ||
6230c9b4 | 1803 | security_sk_clone(parent, sk); |
bb58f747 | 1804 | } else { |
715ec005 GP |
1805 | switch (sk->sk_type) { |
1806 | case SOCK_RAW: | |
1807 | chan->chan_type = L2CAP_CHAN_RAW; | |
1808 | break; | |
1809 | case SOCK_DGRAM: | |
1810 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
2edf870d | 1811 | bt_sk(sk)->skb_msg_name = l2cap_skb_msg_name; |
715ec005 GP |
1812 | break; |
1813 | case SOCK_SEQPACKET: | |
1814 | case SOCK_STREAM: | |
1815 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1816 | break; | |
1817 | } | |
1818 | ||
0c1bc5c6 GP |
1819 | chan->imtu = L2CAP_DEFAULT_MTU; |
1820 | chan->omtu = 0; | |
bb58f747 | 1821 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1822 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1823 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1824 | } else { |
0c1bc5c6 | 1825 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1826 | } |
bd4b1653 AE |
1827 | |
1828 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1829 | } |
1830 | ||
1831 | /* Default config options */ | |
0c1bc5c6 | 1832 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1833 | |
1834 | chan->data = sk; | |
1835 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1836 | } |
1837 | ||
1838 | static struct proto l2cap_proto = { | |
1839 | .name = "L2CAP", | |
1840 | .owner = THIS_MODULE, | |
1841 | .obj_size = sizeof(struct l2cap_pinfo) | |
1842 | }; | |
1843 | ||
2d792818 | 1844 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
11aa9c28 | 1845 | int proto, gfp_t prio, int kern) |
bb58f747 GP |
1846 | { |
1847 | struct sock *sk; | |
dc50a06d | 1848 | struct l2cap_chan *chan; |
bb58f747 | 1849 | |
11aa9c28 | 1850 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto, kern); |
bb58f747 GP |
1851 | if (!sk) |
1852 | return NULL; | |
1853 | ||
1854 | sock_init_data(sock, sk); | |
1855 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1856 | ||
1857 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1858 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1859 | |
1860 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1861 | ||
1862 | sk->sk_protocol = proto; | |
1863 | sk->sk_state = BT_OPEN; | |
1864 | ||
eef1d9b6 | 1865 | chan = l2cap_chan_create(); |
dc50a06d | 1866 | if (!chan) { |
49dfbb91 | 1867 | sk_free(sk); |
dc50a06d GP |
1868 | return NULL; |
1869 | } | |
1870 | ||
61d6ef3e MM |
1871 | l2cap_chan_hold(chan); |
1872 | ||
dc50a06d GP |
1873 | l2cap_pi(sk)->chan = chan; |
1874 | ||
bb58f747 GP |
1875 | return sk; |
1876 | } | |
1877 | ||
1878 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1879 | int kern) | |
1880 | { | |
1881 | struct sock *sk; | |
1882 | ||
1883 | BT_DBG("sock %p", sock); | |
1884 | ||
1885 | sock->state = SS_UNCONNECTED; | |
1886 | ||
1887 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
2d792818 | 1888 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
bb58f747 GP |
1889 | return -ESOCKTNOSUPPORT; |
1890 | ||
1891 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1892 | return -EPERM; | |
1893 | ||
1894 | sock->ops = &l2cap_sock_ops; | |
1895 | ||
11aa9c28 | 1896 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern); |
bb58f747 GP |
1897 | if (!sk) |
1898 | return -ENOMEM; | |
1899 | ||
1900 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1901 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1902 | return 0; |
1903 | } | |
1904 | ||
cf2f90f5 | 1905 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1906 | .family = PF_BLUETOOTH, |
1907 | .owner = THIS_MODULE, | |
1908 | .release = l2cap_sock_release, | |
1909 | .bind = l2cap_sock_bind, | |
1910 | .connect = l2cap_sock_connect, | |
1911 | .listen = l2cap_sock_listen, | |
1912 | .accept = l2cap_sock_accept, | |
1913 | .getname = l2cap_sock_getname, | |
1914 | .sendmsg = l2cap_sock_sendmsg, | |
1915 | .recvmsg = l2cap_sock_recvmsg, | |
a11e1d43 | 1916 | .poll = bt_sock_poll, |
65390587 | 1917 | .ioctl = bt_sock_ioctl, |
c7cbdbf2 | 1918 | .gettstamp = sock_gettstamp, |
65390587 GP |
1919 | .mmap = sock_no_mmap, |
1920 | .socketpair = sock_no_socketpair, | |
1921 | .shutdown = l2cap_sock_shutdown, | |
1922 | .setsockopt = l2cap_sock_setsockopt, | |
1923 | .getsockopt = l2cap_sock_getsockopt | |
1924 | }; | |
1925 | ||
bb58f747 GP |
1926 | static const struct net_proto_family l2cap_sock_family_ops = { |
1927 | .family = PF_BLUETOOTH, | |
1928 | .owner = THIS_MODULE, | |
1929 | .create = l2cap_sock_create, | |
1930 | }; | |
1931 | ||
1932 | int __init l2cap_init_sockets(void) | |
1933 | { | |
e2174ca4 | 1934 | int err; |
bb58f747 | 1935 | |
dd625558 MH |
1936 | BUILD_BUG_ON(sizeof(struct sockaddr_l2) > sizeof(struct sockaddr)); |
1937 | ||
e2174ca4 GP |
1938 | err = proto_register(&l2cap_proto, 0); |
1939 | if (err < 0) | |
1940 | return err; | |
bb58f747 | 1941 | |
e2174ca4 | 1942 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1943 | if (err < 0) { |
1944 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1945 | goto error; |
5b28d95c MY |
1946 | } |
1947 | ||
b0316615 | 1948 | err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list, |
2d792818 | 1949 | NULL); |
5b28d95c MY |
1950 | if (err < 0) { |
1951 | BT_ERR("Failed to create L2CAP proc file"); | |
1952 | bt_sock_unregister(BTPROTO_L2CAP); | |
1953 | goto error; | |
1954 | } | |
bb58f747 | 1955 | |
e2174ca4 | 1956 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1957 | |
e2174ca4 | 1958 | return 0; |
bb58f747 GP |
1959 | |
1960 | error: | |
e2174ca4 GP |
1961 | proto_unregister(&l2cap_proto); |
1962 | return err; | |
bb58f747 GP |
1963 | } |
1964 | ||
1965 | void l2cap_cleanup_sockets(void) | |
1966 | { | |
5b28d95c | 1967 | bt_procfs_cleanup(&init_net, "l2cap"); |
5e9d7f86 | 1968 | bt_sock_unregister(BTPROTO_L2CAP); |
e2174ca4 | 1969 | proto_unregister(&l2cap_proto); |
bb58f747 | 1970 | } |