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