Commit | Line | Data |
---|---|---|
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 | ||
38319713 | 235 | if (chan->psm && bdaddr_type_is_le(chan->src_type)) |
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: |
af6bcd82 GP |
276 | break; |
277 | case L2CAP_MODE_ERTM: | |
278 | case L2CAP_MODE_STREAMING: | |
279 | if (!disable_ertm) | |
280 | break; | |
281 | /* fall through */ | |
282 | default: | |
beb19e4c | 283 | err = -EOPNOTSUPP; |
af6bcd82 GP |
284 | goto done; |
285 | } | |
286 | ||
af6bcd82 GP |
287 | sk->sk_max_ack_backlog = backlog; |
288 | sk->sk_ack_backlog = 0; | |
89bc500e | 289 | |
abe84903 JH |
290 | /* Listening channels need to use nested locking in order not to |
291 | * cause lockdep warnings when the created child channels end up | |
292 | * being locked in the same thread as the parent channel. | |
293 | */ | |
294 | atomic_set(&chan->nesting, L2CAP_NESTING_PARENT); | |
295 | ||
89bc500e | 296 | chan->state = BT_LISTEN; |
af6bcd82 GP |
297 | sk->sk_state = BT_LISTEN; |
298 | ||
299 | done: | |
300 | release_sock(sk); | |
301 | return err; | |
302 | } | |
303 | ||
2d792818 | 304 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, |
cdfbabfb | 305 | int flags, bool kern) |
c47b7c72 | 306 | { |
dfb2fae7 | 307 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
c47b7c72 GP |
308 | struct sock *sk = sock->sk, *nsk; |
309 | long timeo; | |
310 | int err = 0; | |
311 | ||
3b2ab39e | 312 | lock_sock_nested(sk, L2CAP_NESTING_PARENT); |
c47b7c72 | 313 | |
c47b7c72 GP |
314 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
315 | ||
316 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
317 | ||
318 | /* Wait for an incoming connection. (wake-one). */ | |
319 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 320 | while (1) { |
f9a3c20a PH |
321 | if (sk->sk_state != BT_LISTEN) { |
322 | err = -EBADFD; | |
c47b7c72 GP |
323 | break; |
324 | } | |
325 | ||
f9a3c20a PH |
326 | nsk = bt_accept_dequeue(sk, newsock); |
327 | if (nsk) | |
328 | break; | |
c47b7c72 | 329 | |
f9a3c20a PH |
330 | if (!timeo) { |
331 | err = -EAGAIN; | |
c47b7c72 GP |
332 | break; |
333 | } | |
334 | ||
335 | if (signal_pending(current)) { | |
336 | err = sock_intr_errno(timeo); | |
337 | break; | |
338 | } | |
f9a3c20a PH |
339 | |
340 | release_sock(sk); | |
dfb2fae7 PH |
341 | |
342 | timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); | |
343 | ||
3b2ab39e | 344 | lock_sock_nested(sk, L2CAP_NESTING_PARENT); |
c47b7c72 | 345 | } |
c47b7c72 GP |
346 | remove_wait_queue(sk_sleep(sk), &wait); |
347 | ||
348 | if (err) | |
349 | goto done; | |
350 | ||
351 | newsock->state = SS_CONNECTED; | |
352 | ||
353 | BT_DBG("new socket %p", nsk); | |
354 | ||
355 | done: | |
356 | release_sock(sk); | |
357 | return err; | |
358 | } | |
359 | ||
2d792818 | 360 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, |
9b2c45d4 | 361 | int peer) |
d7175d55 GP |
362 | { |
363 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
364 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 365 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
366 | |
367 | BT_DBG("sock %p, sk %p", sock, sk); | |
368 | ||
e8b1ab9e | 369 | if (peer && sk->sk_state != BT_CONNECTED && |
bf19d51b JH |
370 | sk->sk_state != BT_CONNECT && sk->sk_state != BT_CONNECT2 && |
371 | sk->sk_state != BT_CONFIG) | |
b783fbc3 JH |
372 | return -ENOTCONN; |
373 | ||
792039c7 | 374 | memset(la, 0, sizeof(struct sockaddr_l2)); |
d7175d55 | 375 | addr->sa_family = AF_BLUETOOTH; |
d7175d55 | 376 | |
d7e5e76b JH |
377 | la->l2_psm = chan->psm; |
378 | ||
d7175d55 | 379 | if (peer) { |
7eafc59e | 380 | bacpy(&la->l2_bdaddr, &chan->dst); |
fe4128e0 | 381 | la->l2_cid = cpu_to_le16(chan->dcid); |
4f1654e0 | 382 | la->l2_bdaddr_type = chan->dst_type; |
d7175d55 | 383 | } else { |
7eafc59e | 384 | bacpy(&la->l2_bdaddr, &chan->src); |
fe4128e0 | 385 | la->l2_cid = cpu_to_le16(chan->scid); |
4f1654e0 | 386 | la->l2_bdaddr_type = chan->src_type; |
d7175d55 GP |
387 | } |
388 | ||
9b2c45d4 | 389 | return sizeof(struct sockaddr_l2); |
d7175d55 GP |
390 | } |
391 | ||
2d792818 GP |
392 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, |
393 | char __user *optval, int __user *optlen) | |
99f4808d GP |
394 | { |
395 | struct sock *sk = sock->sk; | |
4343478f | 396 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
397 | struct l2cap_options opts; |
398 | struct l2cap_conninfo cinfo; | |
399 | int len, err = 0; | |
400 | u32 opt; | |
401 | ||
402 | BT_DBG("sk %p", sk); | |
403 | ||
404 | if (get_user(len, optlen)) | |
405 | return -EFAULT; | |
406 | ||
407 | lock_sock(sk); | |
408 | ||
409 | switch (optname) { | |
410 | case L2CAP_OPTIONS: | |
64b4f8dc JH |
411 | /* LE sockets should use BT_SNDMTU/BT_RCVMTU, but since |
412 | * legacy ATT code depends on getsockopt for | |
413 | * L2CAP_OPTIONS we need to let this pass. | |
414 | */ | |
415 | if (bdaddr_type_is_le(chan->src_type) && | |
416 | chan->scid != L2CAP_CID_ATT) { | |
417 | err = -EINVAL; | |
418 | break; | |
419 | } | |
420 | ||
e3fb592b | 421 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
422 | opts.imtu = chan->imtu; |
423 | opts.omtu = chan->omtu; | |
424 | opts.flush_to = chan->flush_to; | |
425 | opts.mode = chan->mode; | |
47d1ec61 GP |
426 | opts.fcs = chan->fcs; |
427 | opts.max_tx = chan->max_tx; | |
6327eb98 | 428 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
429 | |
430 | len = min_t(unsigned int, len, sizeof(opts)); | |
431 | if (copy_to_user(optval, (char *) &opts, len)) | |
432 | err = -EFAULT; | |
433 | ||
434 | break; | |
435 | ||
436 | case L2CAP_LM: | |
4343478f | 437 | switch (chan->sec_level) { |
99f4808d GP |
438 | case BT_SECURITY_LOW: |
439 | opt = L2CAP_LM_AUTH; | |
440 | break; | |
441 | case BT_SECURITY_MEDIUM: | |
442 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
443 | break; | |
444 | case BT_SECURITY_HIGH: | |
445 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2d792818 | 446 | L2CAP_LM_SECURE; |
99f4808d | 447 | break; |
7d513e92 MH |
448 | case BT_SECURITY_FIPS: |
449 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
450 | L2CAP_LM_SECURE | L2CAP_LM_FIPS; | |
451 | break; | |
99f4808d GP |
452 | default: |
453 | opt = 0; | |
454 | break; | |
455 | } | |
456 | ||
43bd0f32 | 457 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
458 | opt |= L2CAP_LM_MASTER; |
459 | ||
ecf61bdb | 460 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
461 | opt |= L2CAP_LM_RELIABLE; |
462 | ||
463 | if (put_user(opt, (u32 __user *) optval)) | |
464 | err = -EFAULT; | |
7d513e92 | 465 | |
99f4808d GP |
466 | break; |
467 | ||
468 | case L2CAP_CONNINFO: | |
469 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
470 | !(sk->sk_state == BT_CONNECT2 && |
471 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
472 | err = -ENOTCONN; |
473 | break; | |
474 | } | |
475 | ||
8d03e971 | 476 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
477 | cinfo.hci_handle = chan->conn->hcon->handle; |
478 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
479 | |
480 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
481 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
482 | err = -EFAULT; | |
483 | ||
484 | break; | |
485 | ||
486 | default: | |
487 | err = -ENOPROTOOPT; | |
488 | break; | |
489 | } | |
490 | ||
491 | release_sock(sk); | |
492 | return err; | |
493 | } | |
494 | ||
2d792818 GP |
495 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, |
496 | char __user *optval, int __user *optlen) | |
99f4808d GP |
497 | { |
498 | struct sock *sk = sock->sk; | |
4343478f | 499 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 500 | struct bt_security sec; |
14b12d0b | 501 | struct bt_power pwr; |
99f4808d GP |
502 | int len, err = 0; |
503 | ||
504 | BT_DBG("sk %p", sk); | |
505 | ||
506 | if (level == SOL_L2CAP) | |
507 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
508 | ||
509 | if (level != SOL_BLUETOOTH) | |
510 | return -ENOPROTOOPT; | |
511 | ||
512 | if (get_user(len, optlen)) | |
513 | return -EFAULT; | |
514 | ||
515 | lock_sock(sk); | |
516 | ||
517 | switch (optname) { | |
518 | case BT_SECURITY: | |
715ec005 | 519 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
e0c888ad | 520 | chan->chan_type != L2CAP_CHAN_FIXED && |
2d792818 | 521 | chan->chan_type != L2CAP_CHAN_RAW) { |
99f4808d GP |
522 | err = -EINVAL; |
523 | break; | |
524 | } | |
525 | ||
8f360119 | 526 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 527 | if (chan->conn) { |
c6585a4d | 528 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 529 | |
85e34368 AE |
530 | if (sk->sk_state == BT_CONNECTED) |
531 | sec.key_size = chan->conn->hcon->enc_key_size; | |
532 | } else { | |
533 | sec.level = chan->sec_level; | |
534 | } | |
8f360119 | 535 | |
99f4808d GP |
536 | len = min_t(unsigned int, len, sizeof(sec)); |
537 | if (copy_to_user(optval, (char *) &sec, len)) | |
538 | err = -EFAULT; | |
539 | ||
540 | break; | |
541 | ||
542 | case BT_DEFER_SETUP: | |
543 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
544 | err = -EINVAL; | |
545 | break; | |
546 | } | |
547 | ||
c5daa683 GP |
548 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
549 | (u32 __user *) optval)) | |
99f4808d GP |
550 | err = -EFAULT; |
551 | ||
552 | break; | |
553 | ||
554 | case BT_FLUSHABLE: | |
d57b0e8b | 555 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
2d792818 | 556 | (u32 __user *) optval)) |
99f4808d GP |
557 | err = -EFAULT; |
558 | ||
559 | break; | |
560 | ||
14b12d0b JG |
561 | case BT_POWER: |
562 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
2d792818 | 563 | && sk->sk_type != SOCK_RAW) { |
14b12d0b JG |
564 | err = -EINVAL; |
565 | break; | |
566 | } | |
567 | ||
15770b1a | 568 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
569 | |
570 | len = min_t(unsigned int, len, sizeof(pwr)); | |
571 | if (copy_to_user(optval, (char *) &pwr, len)) | |
572 | err = -EFAULT; | |
573 | ||
574 | break; | |
575 | ||
2ea66482 | 576 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
577 | if (put_user(chan->chan_policy, (u32 __user *) optval)) |
578 | err = -EFAULT; | |
579 | break; | |
580 | ||
1f435424 | 581 | case BT_SNDMTU: |
1f435424 JH |
582 | if (!bdaddr_type_is_le(chan->src_type)) { |
583 | err = -EINVAL; | |
584 | break; | |
585 | } | |
586 | ||
587 | if (sk->sk_state != BT_CONNECTED) { | |
588 | err = -ENOTCONN; | |
589 | break; | |
590 | } | |
591 | ||
592 | if (put_user(chan->omtu, (u16 __user *) optval)) | |
593 | err = -EFAULT; | |
594 | break; | |
595 | ||
596 | case BT_RCVMTU: | |
1f435424 JH |
597 | if (!bdaddr_type_is_le(chan->src_type)) { |
598 | err = -EINVAL; | |
599 | break; | |
600 | } | |
601 | ||
602 | if (put_user(chan->imtu, (u16 __user *) optval)) | |
603 | err = -EFAULT; | |
604 | break; | |
605 | ||
99f4808d GP |
606 | default: |
607 | err = -ENOPROTOOPT; | |
608 | break; | |
609 | } | |
610 | ||
611 | release_sock(sk); | |
612 | return err; | |
613 | } | |
614 | ||
682877c3 AG |
615 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
616 | { | |
617 | switch (chan->scid) { | |
073d1cf3 | 618 | case L2CAP_CID_ATT: |
8c3a4f00 | 619 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
620 | return false; |
621 | break; | |
622 | ||
623 | default: | |
624 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
625 | return false; | |
626 | } | |
627 | ||
628 | return true; | |
629 | } | |
630 | ||
2d792818 GP |
631 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, |
632 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
633 | { |
634 | struct sock *sk = sock->sk; | |
b4450035 | 635 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
636 | struct l2cap_options opts; |
637 | int len, err = 0; | |
638 | u32 opt; | |
639 | ||
640 | BT_DBG("sk %p", sk); | |
641 | ||
642 | lock_sock(sk); | |
643 | ||
644 | switch (optname) { | |
645 | case L2CAP_OPTIONS: | |
64b4f8dc JH |
646 | if (bdaddr_type_is_le(chan->src_type)) { |
647 | err = -EINVAL; | |
648 | break; | |
649 | } | |
650 | ||
33575df7 GP |
651 | if (sk->sk_state == BT_CONNECTED) { |
652 | err = -EINVAL; | |
653 | break; | |
654 | } | |
655 | ||
0c1bc5c6 GP |
656 | opts.imtu = chan->imtu; |
657 | opts.omtu = chan->omtu; | |
658 | opts.flush_to = chan->flush_to; | |
659 | opts.mode = chan->mode; | |
47d1ec61 GP |
660 | opts.fcs = chan->fcs; |
661 | opts.max_tx = chan->max_tx; | |
6327eb98 | 662 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
663 | |
664 | len = min_t(unsigned int, sizeof(opts), optlen); | |
665 | if (copy_from_user((char *) &opts, optval, len)) { | |
666 | err = -EFAULT; | |
667 | break; | |
668 | } | |
669 | ||
6327eb98 | 670 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
671 | err = -EINVAL; |
672 | break; | |
673 | } | |
674 | ||
682877c3 AG |
675 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
676 | err = -EINVAL; | |
677 | break; | |
678 | } | |
679 | ||
0c1bc5c6 GP |
680 | chan->mode = opts.mode; |
681 | switch (chan->mode) { | |
38319713 JH |
682 | case L2CAP_MODE_LE_FLOWCTL: |
683 | break; | |
33575df7 | 684 | case L2CAP_MODE_BASIC: |
c1360a1c | 685 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
686 | break; |
687 | case L2CAP_MODE_ERTM: | |
688 | case L2CAP_MODE_STREAMING: | |
689 | if (!disable_ertm) | |
690 | break; | |
691 | /* fall through */ | |
692 | default: | |
693 | err = -EINVAL; | |
694 | break; | |
695 | } | |
696 | ||
0c1bc5c6 GP |
697 | chan->imtu = opts.imtu; |
698 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
699 | chan->fcs = opts.fcs; |
700 | chan->max_tx = opts.max_tx; | |
6327eb98 | 701 | chan->tx_win = opts.txwin_size; |
12d59781 | 702 | chan->flush_to = opts.flush_to; |
33575df7 GP |
703 | break; |
704 | ||
705 | case L2CAP_LM: | |
706 | if (get_user(opt, (u32 __user *) optval)) { | |
707 | err = -EFAULT; | |
708 | break; | |
709 | } | |
710 | ||
7d513e92 MH |
711 | if (opt & L2CAP_LM_FIPS) { |
712 | err = -EINVAL; | |
713 | break; | |
714 | } | |
715 | ||
33575df7 | 716 | if (opt & L2CAP_LM_AUTH) |
4343478f | 717 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 718 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 719 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 720 | if (opt & L2CAP_LM_SECURE) |
4343478f | 721 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 722 | |
43bd0f32 AE |
723 | if (opt & L2CAP_LM_MASTER) |
724 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
725 | else | |
726 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
727 | |
728 | if (opt & L2CAP_LM_RELIABLE) | |
729 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
730 | else | |
731 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
732 | break; |
733 | ||
734 | default: | |
735 | err = -ENOPROTOOPT; | |
736 | break; | |
737 | } | |
738 | ||
739 | release_sock(sk); | |
740 | return err; | |
741 | } | |
742 | ||
2d792818 GP |
743 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, |
744 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
745 | { |
746 | struct sock *sk = sock->sk; | |
4343478f | 747 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 748 | struct bt_security sec; |
14b12d0b | 749 | struct bt_power pwr; |
f1cb9af5 | 750 | struct l2cap_conn *conn; |
33575df7 GP |
751 | int len, err = 0; |
752 | u32 opt; | |
753 | ||
754 | BT_DBG("sk %p", sk); | |
755 | ||
756 | if (level == SOL_L2CAP) | |
757 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
758 | ||
759 | if (level != SOL_BLUETOOTH) | |
760 | return -ENOPROTOOPT; | |
761 | ||
762 | lock_sock(sk); | |
763 | ||
764 | switch (optname) { | |
765 | case BT_SECURITY: | |
715ec005 | 766 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
e0c888ad | 767 | chan->chan_type != L2CAP_CHAN_FIXED && |
2d792818 | 768 | chan->chan_type != L2CAP_CHAN_RAW) { |
33575df7 GP |
769 | err = -EINVAL; |
770 | break; | |
771 | } | |
772 | ||
773 | sec.level = BT_SECURITY_LOW; | |
774 | ||
775 | len = min_t(unsigned int, sizeof(sec), optlen); | |
776 | if (copy_from_user((char *) &sec, optval, len)) { | |
777 | err = -EFAULT; | |
778 | break; | |
779 | } | |
780 | ||
781 | if (sec.level < BT_SECURITY_LOW || | |
a164cee1 | 782 | sec.level > BT_SECURITY_FIPS) { |
33575df7 GP |
783 | err = -EINVAL; |
784 | break; | |
785 | } | |
786 | ||
4343478f | 787 | chan->sec_level = sec.level; |
f1cb9af5 | 788 | |
0bee1d60 GP |
789 | if (!chan->conn) |
790 | break; | |
791 | ||
f1cb9af5 | 792 | conn = chan->conn; |
0bee1d60 | 793 | |
bbb69b37 | 794 | /* change security for LE channels */ |
073d1cf3 | 795 | if (chan->scid == L2CAP_CID_ATT) { |
bbb69b37 FD |
796 | if (smp_conn_security(conn->hcon, sec.level)) { |
797 | err = -EINVAL; | |
f1cb9af5 | 798 | break; |
bbb69b37 FD |
799 | } |
800 | ||
d52deb17 | 801 | set_bit(FLAG_PENDING_SECURITY, &chan->flags); |
f1cb9af5 | 802 | sk->sk_state = BT_CONFIG; |
3542b854 | 803 | chan->state = BT_CONFIG; |
0bee1d60 | 804 | |
a7d7723a GP |
805 | /* or for ACL link */ |
806 | } else if ((sk->sk_state == BT_CONNECT2 && | |
2d792818 | 807 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a | 808 | sk->sk_state == BT_CONNECTED) { |
e7cafc45 | 809 | if (!l2cap_chan_check_security(chan, true)) |
c5daa683 | 810 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
811 | else |
812 | sk->sk_state_change(sk); | |
0bee1d60 GP |
813 | } else { |
814 | err = -EINVAL; | |
f1cb9af5 | 815 | } |
33575df7 GP |
816 | break; |
817 | ||
818 | case BT_DEFER_SETUP: | |
819 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
820 | err = -EINVAL; | |
821 | break; | |
822 | } | |
823 | ||
824 | if (get_user(opt, (u32 __user *) optval)) { | |
825 | err = -EFAULT; | |
826 | break; | |
827 | } | |
828 | ||
bdc25783 | 829 | if (opt) { |
c5daa683 | 830 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
831 | set_bit(FLAG_DEFER_SETUP, &chan->flags); |
832 | } else { | |
c5daa683 | 833 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
834 | clear_bit(FLAG_DEFER_SETUP, &chan->flags); |
835 | } | |
33575df7 GP |
836 | break; |
837 | ||
838 | case BT_FLUSHABLE: | |
839 | if (get_user(opt, (u32 __user *) optval)) { | |
840 | err = -EFAULT; | |
841 | break; | |
842 | } | |
843 | ||
844 | if (opt > BT_FLUSHABLE_ON) { | |
845 | err = -EINVAL; | |
846 | break; | |
847 | } | |
848 | ||
849 | if (opt == BT_FLUSHABLE_OFF) { | |
c1f23a2b | 850 | conn = chan->conn; |
25985edc | 851 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
852 | No Flush support in the LM */ |
853 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
854 | err = -EINVAL; | |
855 | break; | |
856 | } | |
857 | } | |
858 | ||
d57b0e8b AE |
859 | if (opt) |
860 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
861 | else | |
862 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
863 | break; |
864 | ||
14b12d0b JG |
865 | case BT_POWER: |
866 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
2d792818 | 867 | chan->chan_type != L2CAP_CHAN_RAW) { |
14b12d0b JG |
868 | err = -EINVAL; |
869 | break; | |
870 | } | |
871 | ||
872 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
873 | ||
874 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
875 | if (copy_from_user((char *) &pwr, optval, len)) { | |
876 | err = -EFAULT; | |
877 | break; | |
878 | } | |
15770b1a AE |
879 | |
880 | if (pwr.force_active) | |
881 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
882 | else | |
883 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
884 | break; |
885 | ||
2ea66482 | 886 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
887 | if (get_user(opt, (u32 __user *) optval)) { |
888 | err = -EFAULT; | |
889 | break; | |
890 | } | |
891 | ||
892 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
893 | err = -EINVAL; | |
894 | break; | |
895 | } | |
896 | ||
897 | if (chan->mode != L2CAP_MODE_ERTM && | |
2d792818 | 898 | chan->mode != L2CAP_MODE_STREAMING) { |
2ea66482 MM |
899 | err = -EOPNOTSUPP; |
900 | break; | |
901 | } | |
902 | ||
903 | chan->chan_policy = (u8) opt; | |
3f7a56c4 MM |
904 | |
905 | if (sk->sk_state == BT_CONNECTED && | |
906 | chan->move_role == L2CAP_MOVE_ROLE_NONE) | |
907 | l2cap_move_start(chan); | |
908 | ||
14b12d0b JG |
909 | break; |
910 | ||
1f435424 | 911 | case BT_SNDMTU: |
1f435424 JH |
912 | if (!bdaddr_type_is_le(chan->src_type)) { |
913 | err = -EINVAL; | |
914 | break; | |
915 | } | |
916 | ||
917 | /* Setting is not supported as it's the remote side that | |
918 | * decides this. | |
919 | */ | |
920 | err = -EPERM; | |
921 | break; | |
922 | ||
923 | case BT_RCVMTU: | |
1f435424 JH |
924 | if (!bdaddr_type_is_le(chan->src_type)) { |
925 | err = -EINVAL; | |
926 | break; | |
927 | } | |
928 | ||
929 | if (sk->sk_state == BT_CONNECTED) { | |
930 | err = -EISCONN; | |
931 | break; | |
932 | } | |
933 | ||
23bc6ab0 | 934 | if (get_user(opt, (u16 __user *) optval)) { |
1f435424 JH |
935 | err = -EFAULT; |
936 | break; | |
937 | } | |
938 | ||
939 | chan->imtu = opt; | |
940 | break; | |
941 | ||
33575df7 GP |
942 | default: |
943 | err = -ENOPROTOOPT; | |
944 | break; | |
945 | } | |
946 | ||
947 | release_sock(sk); | |
948 | return err; | |
949 | } | |
fd83ccdb | 950 | |
1b784140 YX |
951 | static int l2cap_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
952 | size_t len) | |
fd83ccdb GP |
953 | { |
954 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 955 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
956 | int err; |
957 | ||
958 | BT_DBG("sock %p, sk %p", sock, sk); | |
959 | ||
960 | err = sock_error(sk); | |
961 | if (err) | |
962 | return err; | |
963 | ||
964 | if (msg->msg_flags & MSG_OOB) | |
965 | return -EOPNOTSUPP; | |
966 | ||
a6a5568c | 967 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 968 | return -ENOTCONN; |
fd83ccdb | 969 | |
e793dcf0 JH |
970 | lock_sock(sk); |
971 | err = bt_sock_wait_ready(sk, msg->msg_flags); | |
972 | release_sock(sk); | |
973 | if (err) | |
974 | return err; | |
975 | ||
a6a5568c | 976 | l2cap_chan_lock(chan); |
8d46321c | 977 | err = l2cap_chan_send(chan, msg, len); |
a6a5568c | 978 | l2cap_chan_unlock(chan); |
fd83ccdb | 979 | |
fd83ccdb GP |
980 | return err; |
981 | } | |
33575df7 | 982 | |
1b784140 YX |
983 | static int l2cap_sock_recvmsg(struct socket *sock, struct msghdr *msg, |
984 | size_t len, int flags) | |
68983259 GP |
985 | { |
986 | struct sock *sk = sock->sk; | |
e328140f MM |
987 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
988 | int err; | |
68983259 GP |
989 | |
990 | lock_sock(sk); | |
991 | ||
c5daa683 GP |
992 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
993 | &bt_sk(sk)->flags)) { | |
38319713 JH |
994 | if (bdaddr_type_is_le(pi->chan->src_type)) { |
995 | sk->sk_state = BT_CONNECTED; | |
996 | pi->chan->state = BT_CONNECTED; | |
997 | __l2cap_le_connect_rsp_defer(pi->chan); | |
998 | } else { | |
999 | sk->sk_state = BT_CONFIG; | |
1000 | pi->chan->state = BT_CONFIG; | |
1001 | __l2cap_connect_rsp_defer(pi->chan); | |
1002 | } | |
8c1d787b | 1003 | |
970871bc JH |
1004 | err = 0; |
1005 | goto done; | |
68983259 GP |
1006 | } |
1007 | ||
1008 | release_sock(sk); | |
1009 | ||
1010 | if (sock->type == SOCK_STREAM) | |
1b784140 | 1011 | err = bt_sock_stream_recvmsg(sock, msg, len, flags); |
e328140f | 1012 | else |
1b784140 | 1013 | err = bt_sock_recvmsg(sock, msg, len, flags); |
e328140f MM |
1014 | |
1015 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
1016 | return err; | |
1017 | ||
1018 | /* Attempt to put pending rx data in the socket buffer */ | |
1019 | ||
1020 | lock_sock(sk); | |
1021 | ||
1022 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
1023 | goto done; | |
1024 | ||
1025 | if (pi->rx_busy_skb) { | |
dbb50887 | 1026 | if (!__sock_queue_rcv_skb(sk, pi->rx_busy_skb)) |
e328140f MM |
1027 | pi->rx_busy_skb = NULL; |
1028 | else | |
1029 | goto done; | |
1030 | } | |
1031 | ||
1032 | /* Restore data flow when half of the receive buffer is | |
1033 | * available. This avoids resending large numbers of | |
1034 | * frames. | |
1035 | */ | |
1036 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
1037 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 1038 | |
e328140f MM |
1039 | done: |
1040 | release_sock(sk); | |
1041 | return err; | |
68983259 GP |
1042 | } |
1043 | ||
05fc1576 GP |
1044 | /* Kill socket (only if zapped and orphan) |
1045 | * Must be called on unlocked socket. | |
1046 | */ | |
ba3bd0ee | 1047 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
1048 | { |
1049 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
1050 | return; | |
1051 | ||
e05dcc32 | 1052 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
1053 | |
1054 | /* Kill poor orphan */ | |
6ff5abbf | 1055 | |
4af66c69 | 1056 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
1057 | sock_set_flag(sk, SOCK_DEAD); |
1058 | sock_put(sk); | |
1059 | } | |
1060 | ||
f65468f6 | 1061 | static int __l2cap_wait_ack(struct sock *sk, struct l2cap_chan *chan) |
dc25306b | 1062 | { |
dc25306b GP |
1063 | DECLARE_WAITQUEUE(wait, current); |
1064 | int err = 0; | |
cb02a255 | 1065 | int timeo = L2CAP_WAIT_ACK_POLL_PERIOD; |
e432c72c DJ |
1066 | /* Timeout to prevent infinite loop */ |
1067 | unsigned long timeout = jiffies + L2CAP_WAIT_ACK_TIMEOUT; | |
dc25306b GP |
1068 | |
1069 | add_wait_queue(sk_sleep(sk), &wait); | |
1070 | set_current_state(TASK_INTERRUPTIBLE); | |
f65468f6 | 1071 | do { |
e432c72c DJ |
1072 | BT_DBG("Waiting for %d ACKs, timeout %04d ms", |
1073 | chan->unacked_frames, time_after(jiffies, timeout) ? 0 : | |
1074 | jiffies_to_msecs(timeout - jiffies)); | |
451e4c6c | 1075 | |
dc25306b | 1076 | if (!timeo) |
cb02a255 | 1077 | timeo = L2CAP_WAIT_ACK_POLL_PERIOD; |
dc25306b GP |
1078 | |
1079 | if (signal_pending(current)) { | |
1080 | err = sock_intr_errno(timeo); | |
1081 | break; | |
1082 | } | |
1083 | ||
1084 | release_sock(sk); | |
1085 | timeo = schedule_timeout(timeo); | |
1086 | lock_sock(sk); | |
1087 | set_current_state(TASK_INTERRUPTIBLE); | |
1088 | ||
1089 | err = sock_error(sk); | |
1090 | if (err) | |
1091 | break; | |
f65468f6 | 1092 | |
e432c72c DJ |
1093 | if (time_after(jiffies, timeout)) { |
1094 | err = -ENOLINK; | |
1095 | break; | |
1096 | } | |
1097 | ||
f65468f6 DJ |
1098 | } while (chan->unacked_frames > 0 && |
1099 | chan->state == BT_CONNECTED); | |
1100 | ||
dc25306b GP |
1101 | set_current_state(TASK_RUNNING); |
1102 | remove_wait_queue(sk_sleep(sk), &wait); | |
1103 | return err; | |
1104 | } | |
1105 | ||
dcba0dba GP |
1106 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1107 | { | |
1108 | struct sock *sk = sock->sk; | |
7ddb6e0f | 1109 | struct l2cap_chan *chan; |
3df91ea2 | 1110 | struct l2cap_conn *conn; |
dcba0dba GP |
1111 | int err = 0; |
1112 | ||
1113 | BT_DBG("sock %p, sk %p", sock, sk); | |
1114 | ||
1115 | if (!sk) | |
1116 | return 0; | |
1117 | ||
04ba72e6 DJ |
1118 | lock_sock(sk); |
1119 | ||
e7456437 DJ |
1120 | if (sk->sk_shutdown) |
1121 | goto shutdown_already; | |
1122 | ||
1123 | BT_DBG("Handling sock shutdown"); | |
1124 | ||
2baea85d DJ |
1125 | /* prevent sk structure from being freed whilst unlocked */ |
1126 | sock_hold(sk); | |
1127 | ||
7ddb6e0f | 1128 | chan = l2cap_pi(sk)->chan; |
2baea85d DJ |
1129 | /* prevent chan structure from being freed whilst unlocked */ |
1130 | l2cap_chan_hold(chan); | |
3df91ea2 | 1131 | |
49d11741 JH |
1132 | BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); |
1133 | ||
e7456437 DJ |
1134 | if (chan->mode == L2CAP_MODE_ERTM && |
1135 | chan->unacked_frames > 0 && | |
9f7378a9 | 1136 | chan->state == BT_CONNECTED) { |
e7456437 | 1137 | err = __l2cap_wait_ack(sk, chan); |
dcba0dba | 1138 | |
9f7378a9 DJ |
1139 | /* After waiting for ACKs, check whether shutdown |
1140 | * has already been actioned to close the L2CAP | |
1141 | * link such as by l2cap_disconnection_req(). | |
1142 | */ | |
1143 | if (sk->sk_shutdown) | |
1144 | goto has_shutdown; | |
1145 | } | |
1146 | ||
e7456437 | 1147 | sk->sk_shutdown = SHUTDOWN_MASK; |
e7456437 | 1148 | release_sock(sk); |
04ba72e6 DJ |
1149 | |
1150 | l2cap_chan_lock(chan); | |
1151 | conn = chan->conn; | |
1152 | if (conn) | |
1153 | /* prevent conn structure from being freed */ | |
1154 | l2cap_conn_get(conn); | |
1155 | l2cap_chan_unlock(chan); | |
1156 | ||
1157 | if (conn) | |
1158 | /* mutex lock must be taken before l2cap_chan_lock() */ | |
1159 | mutex_lock(&conn->chan_lock); | |
1160 | ||
1161 | l2cap_chan_lock(chan); | |
e7456437 | 1162 | l2cap_chan_close(chan, 0); |
04ba72e6 DJ |
1163 | l2cap_chan_unlock(chan); |
1164 | ||
1165 | if (conn) { | |
1166 | mutex_unlock(&conn->chan_lock); | |
1167 | l2cap_conn_put(conn); | |
1168 | } | |
1169 | ||
e7456437 | 1170 | lock_sock(sk); |
dcba0dba | 1171 | |
e7456437 DJ |
1172 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime && |
1173 | !(current->flags & PF_EXITING)) | |
1174 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
1175 | sk->sk_lingertime); | |
dcba0dba | 1176 | |
9f7378a9 | 1177 | has_shutdown: |
04ba72e6 DJ |
1178 | l2cap_chan_put(chan); |
1179 | sock_put(sk); | |
1180 | ||
1181 | shutdown_already: | |
dcba0dba GP |
1182 | if (!err && sk->sk_err) |
1183 | err = -sk->sk_err; | |
1184 | ||
1185 | release_sock(sk); | |
3df91ea2 | 1186 | |
04ba72e6 | 1187 | BT_DBG("Sock shutdown complete err: %d", err); |
451e4c6c | 1188 | |
dcba0dba GP |
1189 | return err; |
1190 | } | |
1191 | ||
554f05bb GP |
1192 | static int l2cap_sock_release(struct socket *sock) |
1193 | { | |
1194 | struct sock *sk = sock->sk; | |
1195 | int err; | |
1196 | ||
1197 | BT_DBG("sock %p, sk %p", sock, sk); | |
1198 | ||
1199 | if (!sk) | |
1200 | return 0; | |
1201 | ||
5b28d95c MY |
1202 | bt_sock_unlink(&l2cap_sk_list, sk); |
1203 | ||
554f05bb GP |
1204 | err = l2cap_sock_shutdown(sock, 2); |
1205 | ||
1206 | sock_orphan(sk); | |
1207 | l2cap_sock_kill(sk); | |
1208 | return err; | |
1209 | } | |
1210 | ||
c0df7f6e AE |
1211 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
1212 | { | |
1213 | struct sock *sk; | |
1214 | ||
49d11741 JH |
1215 | BT_DBG("parent %p state %s", parent, |
1216 | state_to_string(parent->sk_state)); | |
c0df7f6e AE |
1217 | |
1218 | /* Close not yet accepted channels */ | |
1219 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
1220 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
1221 | ||
49d11741 JH |
1222 | BT_DBG("child chan %p state %s", chan, |
1223 | state_to_string(chan->state)); | |
1224 | ||
c0df7f6e AE |
1225 | l2cap_chan_lock(chan); |
1226 | __clear_chan_timer(chan); | |
1227 | l2cap_chan_close(chan, ECONNRESET); | |
1228 | l2cap_chan_unlock(chan); | |
1229 | ||
1230 | l2cap_sock_kill(sk); | |
1231 | } | |
1232 | } | |
1233 | ||
80b98027 | 1234 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 1235 | { |
80b98027 | 1236 | struct sock *sk, *parent = chan->data; |
80808e43 | 1237 | |
8ffb9290 GP |
1238 | lock_sock(parent); |
1239 | ||
53826692 GP |
1240 | /* Check for backlog size */ |
1241 | if (sk_acceptq_is_full(parent)) { | |
1242 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
8a96f3cd | 1243 | release_sock(parent); |
53826692 GP |
1244 | return NULL; |
1245 | } | |
1246 | ||
80808e43 | 1247 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
11aa9c28 | 1248 | GFP_ATOMIC, 0); |
8a96f3cd JT |
1249 | if (!sk) { |
1250 | release_sock(parent); | |
80808e43 | 1251 | return NULL; |
8a96f3cd | 1252 | } |
80808e43 | 1253 | |
d22015aa OP |
1254 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
1255 | ||
80808e43 GP |
1256 | l2cap_sock_init(sk, parent); |
1257 | ||
c4f5627f | 1258 | bt_accept_enqueue(parent, sk, false); |
644912e1 | 1259 | |
8ffb9290 GP |
1260 | release_sock(parent); |
1261 | ||
80808e43 GP |
1262 | return l2cap_pi(sk)->chan; |
1263 | } | |
1264 | ||
80b98027 | 1265 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 1266 | { |
80b98027 | 1267 | struct sock *sk = chan->data; |
84b34d98 | 1268 | int err; |
e328140f | 1269 | |
6be36555 AE |
1270 | lock_sock(sk); |
1271 | ||
84b34d98 | 1272 | if (l2cap_pi(sk)->rx_busy_skb) { |
6be36555 AE |
1273 | err = -ENOMEM; |
1274 | goto done; | |
1275 | } | |
e328140f | 1276 | |
dbb50887 DB |
1277 | if (chan->mode != L2CAP_MODE_ERTM && |
1278 | chan->mode != L2CAP_MODE_STREAMING) { | |
1279 | /* Even if no filter is attached, we could potentially | |
1280 | * get errors from security modules, etc. | |
1281 | */ | |
1282 | err = sk_filter(sk, skb); | |
1283 | if (err) | |
1284 | goto done; | |
1285 | } | |
1286 | ||
1287 | err = __sock_queue_rcv_skb(sk, skb); | |
e328140f MM |
1288 | |
1289 | /* For ERTM, handle one skb that doesn't fit into the recv | |
1290 | * buffer. This is important to do because the data frames | |
1291 | * have already been acked, so the skb cannot be discarded. | |
1292 | * | |
1293 | * Notify the l2cap core that the buffer is full, so the | |
1294 | * LOCAL_BUSY state is entered and no more frames are | |
1295 | * acked and reassembled until there is buffer space | |
1296 | * available. | |
1297 | */ | |
84b34d98 MH |
1298 | if (err < 0 && chan->mode == L2CAP_MODE_ERTM) { |
1299 | l2cap_pi(sk)->rx_busy_skb = skb; | |
1300 | l2cap_chan_busy(chan, 1); | |
e328140f MM |
1301 | err = 0; |
1302 | } | |
23070494 | 1303 | |
6be36555 AE |
1304 | done: |
1305 | release_sock(sk); | |
1306 | ||
e328140f | 1307 | return err; |
23070494 GP |
1308 | } |
1309 | ||
80b98027 | 1310 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 1311 | { |
80b98027 | 1312 | struct sock *sk = chan->data; |
ba3bd0ee GP |
1313 | |
1314 | l2cap_sock_kill(sk); | |
1315 | } | |
1316 | ||
c0df7f6e AE |
1317 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
1318 | { | |
1319 | struct sock *sk = chan->data; | |
1320 | struct sock *parent; | |
1321 | ||
49d11741 JH |
1322 | BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); |
1323 | ||
3b2ab39e JH |
1324 | /* This callback can be called both for server (BT_LISTEN) |
1325 | * sockets as well as "normal" ones. To avoid lockdep warnings | |
1326 | * with child socket locking (through l2cap_sock_cleanup_listen) | |
1327 | * we need separation into separate nesting levels. The simplest | |
1328 | * way to accomplish this is to inherit the nesting level used | |
1329 | * for the channel. | |
1330 | */ | |
1331 | lock_sock_nested(sk, atomic_read(&chan->nesting)); | |
c0df7f6e AE |
1332 | |
1333 | parent = bt_sk(sk)->parent; | |
1334 | ||
1335 | sock_set_flag(sk, SOCK_ZAPPED); | |
1336 | ||
1337 | switch (chan->state) { | |
1338 | case BT_OPEN: | |
1339 | case BT_BOUND: | |
1340 | case BT_CLOSED: | |
1341 | break; | |
1342 | case BT_LISTEN: | |
1343 | l2cap_sock_cleanup_listen(sk); | |
1344 | sk->sk_state = BT_CLOSED; | |
1345 | chan->state = BT_CLOSED; | |
1346 | ||
1347 | break; | |
1348 | default: | |
1349 | sk->sk_state = BT_CLOSED; | |
1350 | chan->state = BT_CLOSED; | |
1351 | ||
1352 | sk->sk_err = err; | |
1353 | ||
1354 | if (parent) { | |
1355 | bt_accept_unlink(sk); | |
676d2369 | 1356 | parent->sk_data_ready(parent); |
c0df7f6e AE |
1357 | } else { |
1358 | sk->sk_state_change(sk); | |
1359 | } | |
1360 | ||
1361 | break; | |
1362 | } | |
1363 | ||
1364 | release_sock(sk); | |
1365 | } | |
1366 | ||
53f52121 GP |
1367 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state, |
1368 | int err) | |
89bc500e | 1369 | { |
80b98027 | 1370 | struct sock *sk = chan->data; |
89bc500e GP |
1371 | |
1372 | sk->sk_state = state; | |
53f52121 GP |
1373 | |
1374 | if (err) | |
1375 | sk->sk_err = err; | |
89bc500e GP |
1376 | } |
1377 | ||
2f7719ce | 1378 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
d9fbd02b | 1379 | unsigned long hdr_len, |
90338947 | 1380 | unsigned long len, int nb) |
2f7719ce | 1381 | { |
0f2c6153 | 1382 | struct sock *sk = chan->data; |
90338947 GP |
1383 | struct sk_buff *skb; |
1384 | int err; | |
1385 | ||
a6a5568c | 1386 | l2cap_chan_unlock(chan); |
d9fbd02b | 1387 | skb = bt_skb_send_alloc(sk, hdr_len + len, nb, &err); |
a6a5568c MM |
1388 | l2cap_chan_lock(chan); |
1389 | ||
90338947 GP |
1390 | if (!skb) |
1391 | return ERR_PTR(err); | |
2f7719ce | 1392 | |
8d46321c MH |
1393 | skb->priority = sk->sk_priority; |
1394 | ||
a4368ff3 | 1395 | bt_cb(skb)->l2cap.chan = chan; |
0e790c64 | 1396 | |
90338947 | 1397 | return skb; |
2f7719ce AE |
1398 | } |
1399 | ||
54a59aa2 AE |
1400 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1401 | { | |
1402 | struct sock *sk = chan->data; | |
1403 | struct sock *parent; | |
1404 | ||
1405 | lock_sock(sk); | |
1406 | ||
1407 | parent = bt_sk(sk)->parent; | |
1408 | ||
1409 | BT_DBG("sk %p, parent %p", sk, parent); | |
1410 | ||
1411 | sk->sk_state = BT_CONNECTED; | |
1412 | sk->sk_state_change(sk); | |
1413 | ||
1414 | if (parent) | |
676d2369 | 1415 | parent->sk_data_ready(parent); |
54a59aa2 AE |
1416 | |
1417 | release_sock(sk); | |
1418 | } | |
1419 | ||
2dc4e510 GP |
1420 | static void l2cap_sock_defer_cb(struct l2cap_chan *chan) |
1421 | { | |
acdcabf5 GP |
1422 | struct sock *parent, *sk = chan->data; |
1423 | ||
1424 | lock_sock(sk); | |
2dc4e510 | 1425 | |
acdcabf5 | 1426 | parent = bt_sk(sk)->parent; |
2dc4e510 | 1427 | if (parent) |
676d2369 | 1428 | parent->sk_data_ready(parent); |
acdcabf5 GP |
1429 | |
1430 | release_sock(sk); | |
2dc4e510 GP |
1431 | } |
1432 | ||
d97c899b MH |
1433 | static void l2cap_sock_resume_cb(struct l2cap_chan *chan) |
1434 | { | |
1435 | struct sock *sk = chan->data; | |
1436 | ||
d52deb17 JH |
1437 | if (test_and_clear_bit(FLAG_PENDING_SECURITY, &chan->flags)) { |
1438 | sk->sk_state = BT_CONNECTED; | |
1439 | chan->state = BT_CONNECTED; | |
1440 | } | |
1441 | ||
d97c899b MH |
1442 | clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
1443 | sk->sk_state_change(sk); | |
1444 | } | |
1445 | ||
5ec1bbe5 GP |
1446 | static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan) |
1447 | { | |
1448 | struct sock *sk = chan->data; | |
1449 | ||
1450 | lock_sock(sk); | |
1451 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1452 | release_sock(sk); | |
1453 | } | |
1454 | ||
8d836d71 GP |
1455 | static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan) |
1456 | { | |
1457 | struct sock *sk = chan->data; | |
1458 | ||
1459 | return sk->sk_sndtimeo; | |
1460 | } | |
1461 | ||
837776f7 JH |
1462 | static void l2cap_sock_suspend_cb(struct l2cap_chan *chan) |
1463 | { | |
1464 | struct sock *sk = chan->data; | |
1465 | ||
1466 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); | |
1467 | sk->sk_state_change(sk); | |
1468 | } | |
1469 | ||
67f86a45 | 1470 | static const struct l2cap_ops l2cap_chan_ops = { |
0498878b JR |
1471 | .name = "L2CAP Socket Interface", |
1472 | .new_connection = l2cap_sock_new_connection_cb, | |
1473 | .recv = l2cap_sock_recv_cb, | |
1474 | .close = l2cap_sock_close_cb, | |
1475 | .teardown = l2cap_sock_teardown_cb, | |
1476 | .state_change = l2cap_sock_state_change_cb, | |
1477 | .ready = l2cap_sock_ready_cb, | |
1478 | .defer = l2cap_sock_defer_cb, | |
1479 | .resume = l2cap_sock_resume_cb, | |
1480 | .suspend = l2cap_sock_suspend_cb, | |
1481 | .set_shutdown = l2cap_sock_set_shutdown_cb, | |
1482 | .get_sndtimeo = l2cap_sock_get_sndtimeo_cb, | |
1483 | .alloc_skb = l2cap_sock_alloc_skb_cb, | |
80808e43 GP |
1484 | }; |
1485 | ||
bb58f747 GP |
1486 | static void l2cap_sock_destruct(struct sock *sk) |
1487 | { | |
1488 | BT_DBG("sk %p", sk); | |
1489 | ||
23d3a869 SL |
1490 | if (l2cap_pi(sk)->chan) |
1491 | l2cap_chan_put(l2cap_pi(sk)->chan); | |
84b34d98 | 1492 | |
e328140f MM |
1493 | if (l2cap_pi(sk)->rx_busy_skb) { |
1494 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1495 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1496 | } | |
1497 | ||
bb58f747 GP |
1498 | skb_queue_purge(&sk->sk_receive_queue); |
1499 | skb_queue_purge(&sk->sk_write_queue); | |
1500 | } | |
1501 | ||
2edf870d MH |
1502 | static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name, |
1503 | int *msg_namelen) | |
1504 | { | |
342dfc30 | 1505 | DECLARE_SOCKADDR(struct sockaddr_l2 *, la, msg_name); |
2edf870d MH |
1506 | |
1507 | memset(la, 0, sizeof(struct sockaddr_l2)); | |
1508 | la->l2_family = AF_BLUETOOTH; | |
a4368ff3 JH |
1509 | la->l2_psm = bt_cb(skb)->l2cap.psm; |
1510 | bacpy(&la->l2_bdaddr, &bt_cb(skb)->l2cap.bdaddr); | |
2edf870d MH |
1511 | |
1512 | *msg_namelen = sizeof(struct sockaddr_l2); | |
1513 | } | |
1514 | ||
80808e43 | 1515 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 | 1516 | { |
84b34d98 | 1517 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
bb58f747 GP |
1518 | |
1519 | BT_DBG("sk %p", sk); | |
1520 | ||
1521 | if (parent) { | |
b4450035 GP |
1522 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1523 | ||
bb58f747 | 1524 | sk->sk_type = parent->sk_type; |
c5daa683 | 1525 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1526 | |
715ec005 | 1527 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1528 | chan->imtu = pchan->imtu; |
1529 | chan->omtu = pchan->omtu; | |
b4450035 | 1530 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1531 | chan->mode = pchan->mode; |
47d1ec61 GP |
1532 | chan->fcs = pchan->fcs; |
1533 | chan->max_tx = pchan->max_tx; | |
1534 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1535 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1536 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1537 | chan->flags = pchan->flags; |
0cd75f7e JH |
1538 | chan->tx_credits = pchan->tx_credits; |
1539 | chan->rx_credits = pchan->rx_credits; | |
6230c9b4 | 1540 | |
7a8e5a31 JH |
1541 | if (chan->chan_type == L2CAP_CHAN_FIXED) { |
1542 | chan->scid = pchan->scid; | |
1543 | chan->dcid = pchan->scid; | |
1544 | } | |
1545 | ||
6230c9b4 | 1546 | security_sk_clone(parent, sk); |
bb58f747 | 1547 | } else { |
715ec005 GP |
1548 | switch (sk->sk_type) { |
1549 | case SOCK_RAW: | |
1550 | chan->chan_type = L2CAP_CHAN_RAW; | |
1551 | break; | |
1552 | case SOCK_DGRAM: | |
1553 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
2edf870d | 1554 | bt_sk(sk)->skb_msg_name = l2cap_skb_msg_name; |
715ec005 GP |
1555 | break; |
1556 | case SOCK_SEQPACKET: | |
1557 | case SOCK_STREAM: | |
1558 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1559 | break; | |
1560 | } | |
1561 | ||
0c1bc5c6 GP |
1562 | chan->imtu = L2CAP_DEFAULT_MTU; |
1563 | chan->omtu = 0; | |
bb58f747 | 1564 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1565 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1566 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1567 | } else { |
0c1bc5c6 | 1568 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1569 | } |
bd4b1653 AE |
1570 | |
1571 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1572 | } |
1573 | ||
1574 | /* Default config options */ | |
0c1bc5c6 | 1575 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1576 | |
1577 | chan->data = sk; | |
1578 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1579 | } |
1580 | ||
1581 | static struct proto l2cap_proto = { | |
1582 | .name = "L2CAP", | |
1583 | .owner = THIS_MODULE, | |
1584 | .obj_size = sizeof(struct l2cap_pinfo) | |
1585 | }; | |
1586 | ||
2d792818 | 1587 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
11aa9c28 | 1588 | int proto, gfp_t prio, int kern) |
bb58f747 GP |
1589 | { |
1590 | struct sock *sk; | |
dc50a06d | 1591 | struct l2cap_chan *chan; |
bb58f747 | 1592 | |
11aa9c28 | 1593 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto, kern); |
bb58f747 GP |
1594 | if (!sk) |
1595 | return NULL; | |
1596 | ||
1597 | sock_init_data(sock, sk); | |
1598 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1599 | ||
1600 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1601 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1602 | |
1603 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1604 | ||
1605 | sk->sk_protocol = proto; | |
1606 | sk->sk_state = BT_OPEN; | |
1607 | ||
eef1d9b6 | 1608 | chan = l2cap_chan_create(); |
dc50a06d | 1609 | if (!chan) { |
49dfbb91 | 1610 | sk_free(sk); |
dc50a06d GP |
1611 | return NULL; |
1612 | } | |
1613 | ||
61d6ef3e MM |
1614 | l2cap_chan_hold(chan); |
1615 | ||
dc50a06d GP |
1616 | l2cap_pi(sk)->chan = chan; |
1617 | ||
bb58f747 GP |
1618 | return sk; |
1619 | } | |
1620 | ||
1621 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1622 | int kern) | |
1623 | { | |
1624 | struct sock *sk; | |
1625 | ||
1626 | BT_DBG("sock %p", sock); | |
1627 | ||
1628 | sock->state = SS_UNCONNECTED; | |
1629 | ||
1630 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
2d792818 | 1631 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
bb58f747 GP |
1632 | return -ESOCKTNOSUPPORT; |
1633 | ||
1634 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1635 | return -EPERM; | |
1636 | ||
1637 | sock->ops = &l2cap_sock_ops; | |
1638 | ||
11aa9c28 | 1639 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern); |
bb58f747 GP |
1640 | if (!sk) |
1641 | return -ENOMEM; | |
1642 | ||
1643 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1644 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1645 | return 0; |
1646 | } | |
1647 | ||
cf2f90f5 | 1648 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1649 | .family = PF_BLUETOOTH, |
1650 | .owner = THIS_MODULE, | |
1651 | .release = l2cap_sock_release, | |
1652 | .bind = l2cap_sock_bind, | |
1653 | .connect = l2cap_sock_connect, | |
1654 | .listen = l2cap_sock_listen, | |
1655 | .accept = l2cap_sock_accept, | |
1656 | .getname = l2cap_sock_getname, | |
1657 | .sendmsg = l2cap_sock_sendmsg, | |
1658 | .recvmsg = l2cap_sock_recvmsg, | |
a11e1d43 | 1659 | .poll = bt_sock_poll, |
65390587 | 1660 | .ioctl = bt_sock_ioctl, |
c7cbdbf2 | 1661 | .gettstamp = sock_gettstamp, |
65390587 GP |
1662 | .mmap = sock_no_mmap, |
1663 | .socketpair = sock_no_socketpair, | |
1664 | .shutdown = l2cap_sock_shutdown, | |
1665 | .setsockopt = l2cap_sock_setsockopt, | |
1666 | .getsockopt = l2cap_sock_getsockopt | |
1667 | }; | |
1668 | ||
bb58f747 GP |
1669 | static const struct net_proto_family l2cap_sock_family_ops = { |
1670 | .family = PF_BLUETOOTH, | |
1671 | .owner = THIS_MODULE, | |
1672 | .create = l2cap_sock_create, | |
1673 | }; | |
1674 | ||
1675 | int __init l2cap_init_sockets(void) | |
1676 | { | |
e2174ca4 | 1677 | int err; |
bb58f747 | 1678 | |
dd625558 MH |
1679 | BUILD_BUG_ON(sizeof(struct sockaddr_l2) > sizeof(struct sockaddr)); |
1680 | ||
e2174ca4 GP |
1681 | err = proto_register(&l2cap_proto, 0); |
1682 | if (err < 0) | |
1683 | return err; | |
bb58f747 | 1684 | |
e2174ca4 | 1685 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1686 | if (err < 0) { |
1687 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1688 | goto error; |
5b28d95c MY |
1689 | } |
1690 | ||
b0316615 | 1691 | err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list, |
2d792818 | 1692 | NULL); |
5b28d95c MY |
1693 | if (err < 0) { |
1694 | BT_ERR("Failed to create L2CAP proc file"); | |
1695 | bt_sock_unregister(BTPROTO_L2CAP); | |
1696 | goto error; | |
1697 | } | |
bb58f747 | 1698 | |
e2174ca4 | 1699 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1700 | |
e2174ca4 | 1701 | return 0; |
bb58f747 GP |
1702 | |
1703 | error: | |
e2174ca4 GP |
1704 | proto_unregister(&l2cap_proto); |
1705 | return err; | |
bb58f747 GP |
1706 | } |
1707 | ||
1708 | void l2cap_cleanup_sockets(void) | |
1709 | { | |
5b28d95c | 1710 | bt_procfs_cleanup(&init_net, "l2cap"); |
5e9d7f86 | 1711 | bt_sock_unregister(BTPROTO_L2CAP); |
e2174ca4 | 1712 | proto_unregister(&l2cap_proto); |
bb58f747 | 1713 | } |