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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 | ||
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 GP |
360 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, |
361 | int *len, 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 GP |
375 | addr->sa_family = AF_BLUETOOTH; |
376 | *len = sizeof(struct sockaddr_l2); | |
377 | ||
d7e5e76b JH |
378 | la->l2_psm = chan->psm; |
379 | ||
d7175d55 | 380 | if (peer) { |
7eafc59e | 381 | bacpy(&la->l2_bdaddr, &chan->dst); |
fe4128e0 | 382 | la->l2_cid = cpu_to_le16(chan->dcid); |
4f1654e0 | 383 | la->l2_bdaddr_type = chan->dst_type; |
d7175d55 | 384 | } else { |
7eafc59e | 385 | bacpy(&la->l2_bdaddr, &chan->src); |
fe4128e0 | 386 | la->l2_cid = cpu_to_le16(chan->scid); |
4f1654e0 | 387 | la->l2_bdaddr_type = chan->src_type; |
d7175d55 GP |
388 | } |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
2d792818 GP |
393 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, |
394 | char __user *optval, int __user *optlen) | |
99f4808d GP |
395 | { |
396 | struct sock *sk = sock->sk; | |
4343478f | 397 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
398 | struct l2cap_options opts; |
399 | struct l2cap_conninfo cinfo; | |
400 | int len, err = 0; | |
401 | u32 opt; | |
402 | ||
403 | BT_DBG("sk %p", sk); | |
404 | ||
405 | if (get_user(len, optlen)) | |
406 | return -EFAULT; | |
407 | ||
408 | lock_sock(sk); | |
409 | ||
410 | switch (optname) { | |
411 | case L2CAP_OPTIONS: | |
64b4f8dc JH |
412 | /* LE sockets should use BT_SNDMTU/BT_RCVMTU, but since |
413 | * legacy ATT code depends on getsockopt for | |
414 | * L2CAP_OPTIONS we need to let this pass. | |
415 | */ | |
416 | if (bdaddr_type_is_le(chan->src_type) && | |
417 | chan->scid != L2CAP_CID_ATT) { | |
418 | err = -EINVAL; | |
419 | break; | |
420 | } | |
421 | ||
e3fb592b | 422 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
423 | opts.imtu = chan->imtu; |
424 | opts.omtu = chan->omtu; | |
425 | opts.flush_to = chan->flush_to; | |
426 | opts.mode = chan->mode; | |
47d1ec61 GP |
427 | opts.fcs = chan->fcs; |
428 | opts.max_tx = chan->max_tx; | |
6327eb98 | 429 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
430 | |
431 | len = min_t(unsigned int, len, sizeof(opts)); | |
432 | if (copy_to_user(optval, (char *) &opts, len)) | |
433 | err = -EFAULT; | |
434 | ||
435 | break; | |
436 | ||
437 | case L2CAP_LM: | |
4343478f | 438 | switch (chan->sec_level) { |
99f4808d GP |
439 | case BT_SECURITY_LOW: |
440 | opt = L2CAP_LM_AUTH; | |
441 | break; | |
442 | case BT_SECURITY_MEDIUM: | |
443 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
444 | break; | |
445 | case BT_SECURITY_HIGH: | |
446 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2d792818 | 447 | L2CAP_LM_SECURE; |
99f4808d | 448 | break; |
7d513e92 MH |
449 | case BT_SECURITY_FIPS: |
450 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
451 | L2CAP_LM_SECURE | L2CAP_LM_FIPS; | |
452 | break; | |
99f4808d GP |
453 | default: |
454 | opt = 0; | |
455 | break; | |
456 | } | |
457 | ||
43bd0f32 | 458 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
459 | opt |= L2CAP_LM_MASTER; |
460 | ||
ecf61bdb | 461 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
462 | opt |= L2CAP_LM_RELIABLE; |
463 | ||
464 | if (put_user(opt, (u32 __user *) optval)) | |
465 | err = -EFAULT; | |
7d513e92 | 466 | |
99f4808d GP |
467 | break; |
468 | ||
469 | case L2CAP_CONNINFO: | |
470 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
471 | !(sk->sk_state == BT_CONNECT2 && |
472 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
473 | err = -ENOTCONN; |
474 | break; | |
475 | } | |
476 | ||
8d03e971 | 477 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
478 | cinfo.hci_handle = chan->conn->hcon->handle; |
479 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
480 | |
481 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
482 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
483 | err = -EFAULT; | |
484 | ||
485 | break; | |
486 | ||
487 | default: | |
488 | err = -ENOPROTOOPT; | |
489 | break; | |
490 | } | |
491 | ||
492 | release_sock(sk); | |
493 | return err; | |
494 | } | |
495 | ||
2d792818 GP |
496 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, |
497 | char __user *optval, int __user *optlen) | |
99f4808d GP |
498 | { |
499 | struct sock *sk = sock->sk; | |
4343478f | 500 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 501 | struct bt_security sec; |
14b12d0b | 502 | struct bt_power pwr; |
99f4808d GP |
503 | int len, err = 0; |
504 | ||
505 | BT_DBG("sk %p", sk); | |
506 | ||
507 | if (level == SOL_L2CAP) | |
508 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
509 | ||
510 | if (level != SOL_BLUETOOTH) | |
511 | return -ENOPROTOOPT; | |
512 | ||
513 | if (get_user(len, optlen)) | |
514 | return -EFAULT; | |
515 | ||
516 | lock_sock(sk); | |
517 | ||
518 | switch (optname) { | |
519 | case BT_SECURITY: | |
715ec005 | 520 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
e0c888ad | 521 | chan->chan_type != L2CAP_CHAN_FIXED && |
2d792818 | 522 | chan->chan_type != L2CAP_CHAN_RAW) { |
99f4808d GP |
523 | err = -EINVAL; |
524 | break; | |
525 | } | |
526 | ||
8f360119 | 527 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 528 | if (chan->conn) { |
c6585a4d | 529 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 530 | |
85e34368 AE |
531 | if (sk->sk_state == BT_CONNECTED) |
532 | sec.key_size = chan->conn->hcon->enc_key_size; | |
533 | } else { | |
534 | sec.level = chan->sec_level; | |
535 | } | |
8f360119 | 536 | |
99f4808d GP |
537 | len = min_t(unsigned int, len, sizeof(sec)); |
538 | if (copy_to_user(optval, (char *) &sec, len)) | |
539 | err = -EFAULT; | |
540 | ||
541 | break; | |
542 | ||
543 | case BT_DEFER_SETUP: | |
544 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
545 | err = -EINVAL; | |
546 | break; | |
547 | } | |
548 | ||
c5daa683 GP |
549 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
550 | (u32 __user *) optval)) | |
99f4808d GP |
551 | err = -EFAULT; |
552 | ||
553 | break; | |
554 | ||
555 | case BT_FLUSHABLE: | |
d57b0e8b | 556 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
2d792818 | 557 | (u32 __user *) optval)) |
99f4808d GP |
558 | err = -EFAULT; |
559 | ||
560 | break; | |
561 | ||
14b12d0b JG |
562 | case BT_POWER: |
563 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
2d792818 | 564 | && sk->sk_type != SOCK_RAW) { |
14b12d0b JG |
565 | err = -EINVAL; |
566 | break; | |
567 | } | |
568 | ||
15770b1a | 569 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
570 | |
571 | len = min_t(unsigned int, len, sizeof(pwr)); | |
572 | if (copy_to_user(optval, (char *) &pwr, len)) | |
573 | err = -EFAULT; | |
574 | ||
575 | break; | |
576 | ||
2ea66482 | 577 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
578 | if (put_user(chan->chan_policy, (u32 __user *) optval)) |
579 | err = -EFAULT; | |
580 | break; | |
581 | ||
1f435424 | 582 | case BT_SNDMTU: |
1f435424 JH |
583 | if (!bdaddr_type_is_le(chan->src_type)) { |
584 | err = -EINVAL; | |
585 | break; | |
586 | } | |
587 | ||
588 | if (sk->sk_state != BT_CONNECTED) { | |
589 | err = -ENOTCONN; | |
590 | break; | |
591 | } | |
592 | ||
593 | if (put_user(chan->omtu, (u16 __user *) optval)) | |
594 | err = -EFAULT; | |
595 | break; | |
596 | ||
597 | case BT_RCVMTU: | |
1f435424 JH |
598 | if (!bdaddr_type_is_le(chan->src_type)) { |
599 | err = -EINVAL; | |
600 | break; | |
601 | } | |
602 | ||
603 | if (put_user(chan->imtu, (u16 __user *) optval)) | |
604 | err = -EFAULT; | |
605 | break; | |
606 | ||
99f4808d GP |
607 | default: |
608 | err = -ENOPROTOOPT; | |
609 | break; | |
610 | } | |
611 | ||
612 | release_sock(sk); | |
613 | return err; | |
614 | } | |
615 | ||
682877c3 AG |
616 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
617 | { | |
618 | switch (chan->scid) { | |
073d1cf3 | 619 | case L2CAP_CID_ATT: |
8c3a4f00 | 620 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
621 | return false; |
622 | break; | |
623 | ||
624 | default: | |
625 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
626 | return false; | |
627 | } | |
628 | ||
629 | return true; | |
630 | } | |
631 | ||
2d792818 GP |
632 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, |
633 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
634 | { |
635 | struct sock *sk = sock->sk; | |
b4450035 | 636 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
637 | struct l2cap_options opts; |
638 | int len, err = 0; | |
639 | u32 opt; | |
640 | ||
641 | BT_DBG("sk %p", sk); | |
642 | ||
643 | lock_sock(sk); | |
644 | ||
645 | switch (optname) { | |
646 | case L2CAP_OPTIONS: | |
64b4f8dc JH |
647 | if (bdaddr_type_is_le(chan->src_type)) { |
648 | err = -EINVAL; | |
649 | break; | |
650 | } | |
651 | ||
33575df7 GP |
652 | if (sk->sk_state == BT_CONNECTED) { |
653 | err = -EINVAL; | |
654 | break; | |
655 | } | |
656 | ||
0c1bc5c6 GP |
657 | opts.imtu = chan->imtu; |
658 | opts.omtu = chan->omtu; | |
659 | opts.flush_to = chan->flush_to; | |
660 | opts.mode = chan->mode; | |
47d1ec61 GP |
661 | opts.fcs = chan->fcs; |
662 | opts.max_tx = chan->max_tx; | |
6327eb98 | 663 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
664 | |
665 | len = min_t(unsigned int, sizeof(opts), optlen); | |
666 | if (copy_from_user((char *) &opts, optval, len)) { | |
667 | err = -EFAULT; | |
668 | break; | |
669 | } | |
670 | ||
6327eb98 | 671 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
672 | err = -EINVAL; |
673 | break; | |
674 | } | |
675 | ||
682877c3 AG |
676 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
677 | err = -EINVAL; | |
678 | break; | |
679 | } | |
680 | ||
0c1bc5c6 GP |
681 | chan->mode = opts.mode; |
682 | switch (chan->mode) { | |
38319713 JH |
683 | case L2CAP_MODE_LE_FLOWCTL: |
684 | break; | |
33575df7 | 685 | case L2CAP_MODE_BASIC: |
c1360a1c | 686 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
687 | break; |
688 | case L2CAP_MODE_ERTM: | |
689 | case L2CAP_MODE_STREAMING: | |
690 | if (!disable_ertm) | |
691 | break; | |
692 | /* fall through */ | |
693 | default: | |
694 | err = -EINVAL; | |
695 | break; | |
696 | } | |
697 | ||
0c1bc5c6 GP |
698 | chan->imtu = opts.imtu; |
699 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
700 | chan->fcs = opts.fcs; |
701 | chan->max_tx = opts.max_tx; | |
6327eb98 | 702 | chan->tx_win = opts.txwin_size; |
12d59781 | 703 | chan->flush_to = opts.flush_to; |
33575df7 GP |
704 | break; |
705 | ||
706 | case L2CAP_LM: | |
707 | if (get_user(opt, (u32 __user *) optval)) { | |
708 | err = -EFAULT; | |
709 | break; | |
710 | } | |
711 | ||
7d513e92 MH |
712 | if (opt & L2CAP_LM_FIPS) { |
713 | err = -EINVAL; | |
714 | break; | |
715 | } | |
716 | ||
33575df7 | 717 | if (opt & L2CAP_LM_AUTH) |
4343478f | 718 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 719 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 720 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 721 | if (opt & L2CAP_LM_SECURE) |
4343478f | 722 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 723 | |
43bd0f32 AE |
724 | if (opt & L2CAP_LM_MASTER) |
725 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
726 | else | |
727 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
728 | |
729 | if (opt & L2CAP_LM_RELIABLE) | |
730 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
731 | else | |
732 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
733 | break; |
734 | ||
735 | default: | |
736 | err = -ENOPROTOOPT; | |
737 | break; | |
738 | } | |
739 | ||
740 | release_sock(sk); | |
741 | return err; | |
742 | } | |
743 | ||
2d792818 GP |
744 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, |
745 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
746 | { |
747 | struct sock *sk = sock->sk; | |
4343478f | 748 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 749 | struct bt_security sec; |
14b12d0b | 750 | struct bt_power pwr; |
f1cb9af5 | 751 | struct l2cap_conn *conn; |
33575df7 GP |
752 | int len, err = 0; |
753 | u32 opt; | |
754 | ||
755 | BT_DBG("sk %p", sk); | |
756 | ||
757 | if (level == SOL_L2CAP) | |
758 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
759 | ||
760 | if (level != SOL_BLUETOOTH) | |
761 | return -ENOPROTOOPT; | |
762 | ||
763 | lock_sock(sk); | |
764 | ||
765 | switch (optname) { | |
766 | case BT_SECURITY: | |
715ec005 | 767 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
e0c888ad | 768 | chan->chan_type != L2CAP_CHAN_FIXED && |
2d792818 | 769 | chan->chan_type != L2CAP_CHAN_RAW) { |
33575df7 GP |
770 | err = -EINVAL; |
771 | break; | |
772 | } | |
773 | ||
774 | sec.level = BT_SECURITY_LOW; | |
775 | ||
776 | len = min_t(unsigned int, sizeof(sec), optlen); | |
777 | if (copy_from_user((char *) &sec, optval, len)) { | |
778 | err = -EFAULT; | |
779 | break; | |
780 | } | |
781 | ||
782 | if (sec.level < BT_SECURITY_LOW || | |
a164cee1 | 783 | sec.level > BT_SECURITY_FIPS) { |
33575df7 GP |
784 | err = -EINVAL; |
785 | break; | |
786 | } | |
787 | ||
4343478f | 788 | chan->sec_level = sec.level; |
f1cb9af5 | 789 | |
0bee1d60 GP |
790 | if (!chan->conn) |
791 | break; | |
792 | ||
f1cb9af5 | 793 | conn = chan->conn; |
0bee1d60 GP |
794 | |
795 | /*change security for LE channels */ | |
073d1cf3 | 796 | if (chan->scid == L2CAP_CID_ATT) { |
cc110922 | 797 | if (smp_conn_security(conn->hcon, sec.level)) |
f1cb9af5 | 798 | break; |
d52deb17 | 799 | set_bit(FLAG_PENDING_SECURITY, &chan->flags); |
f1cb9af5 | 800 | sk->sk_state = BT_CONFIG; |
3542b854 | 801 | chan->state = BT_CONFIG; |
0bee1d60 | 802 | |
a7d7723a GP |
803 | /* or for ACL link */ |
804 | } else if ((sk->sk_state == BT_CONNECT2 && | |
2d792818 | 805 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a | 806 | sk->sk_state == BT_CONNECTED) { |
e7cafc45 | 807 | if (!l2cap_chan_check_security(chan, true)) |
c5daa683 | 808 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
809 | else |
810 | sk->sk_state_change(sk); | |
0bee1d60 GP |
811 | } else { |
812 | err = -EINVAL; | |
f1cb9af5 | 813 | } |
33575df7 GP |
814 | break; |
815 | ||
816 | case BT_DEFER_SETUP: | |
817 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
818 | err = -EINVAL; | |
819 | break; | |
820 | } | |
821 | ||
822 | if (get_user(opt, (u32 __user *) optval)) { | |
823 | err = -EFAULT; | |
824 | break; | |
825 | } | |
826 | ||
bdc25783 | 827 | if (opt) { |
c5daa683 | 828 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
829 | set_bit(FLAG_DEFER_SETUP, &chan->flags); |
830 | } else { | |
c5daa683 | 831 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
832 | clear_bit(FLAG_DEFER_SETUP, &chan->flags); |
833 | } | |
33575df7 GP |
834 | break; |
835 | ||
836 | case BT_FLUSHABLE: | |
837 | if (get_user(opt, (u32 __user *) optval)) { | |
838 | err = -EFAULT; | |
839 | break; | |
840 | } | |
841 | ||
842 | if (opt > BT_FLUSHABLE_ON) { | |
843 | err = -EINVAL; | |
844 | break; | |
845 | } | |
846 | ||
847 | if (opt == BT_FLUSHABLE_OFF) { | |
c1f23a2b | 848 | conn = chan->conn; |
25985edc | 849 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
850 | No Flush support in the LM */ |
851 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
852 | err = -EINVAL; | |
853 | break; | |
854 | } | |
855 | } | |
856 | ||
d57b0e8b AE |
857 | if (opt) |
858 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
859 | else | |
860 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
861 | break; |
862 | ||
14b12d0b JG |
863 | case BT_POWER: |
864 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
2d792818 | 865 | chan->chan_type != L2CAP_CHAN_RAW) { |
14b12d0b JG |
866 | err = -EINVAL; |
867 | break; | |
868 | } | |
869 | ||
870 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
871 | ||
872 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
873 | if (copy_from_user((char *) &pwr, optval, len)) { | |
874 | err = -EFAULT; | |
875 | break; | |
876 | } | |
15770b1a AE |
877 | |
878 | if (pwr.force_active) | |
879 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
880 | else | |
881 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
882 | break; |
883 | ||
2ea66482 | 884 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
885 | if (get_user(opt, (u32 __user *) optval)) { |
886 | err = -EFAULT; | |
887 | break; | |
888 | } | |
889 | ||
890 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
891 | err = -EINVAL; | |
892 | break; | |
893 | } | |
894 | ||
895 | if (chan->mode != L2CAP_MODE_ERTM && | |
2d792818 | 896 | chan->mode != L2CAP_MODE_STREAMING) { |
2ea66482 MM |
897 | err = -EOPNOTSUPP; |
898 | break; | |
899 | } | |
900 | ||
901 | chan->chan_policy = (u8) opt; | |
3f7a56c4 MM |
902 | |
903 | if (sk->sk_state == BT_CONNECTED && | |
904 | chan->move_role == L2CAP_MOVE_ROLE_NONE) | |
905 | l2cap_move_start(chan); | |
906 | ||
14b12d0b JG |
907 | break; |
908 | ||
1f435424 | 909 | case BT_SNDMTU: |
1f435424 JH |
910 | if (!bdaddr_type_is_le(chan->src_type)) { |
911 | err = -EINVAL; | |
912 | break; | |
913 | } | |
914 | ||
915 | /* Setting is not supported as it's the remote side that | |
916 | * decides this. | |
917 | */ | |
918 | err = -EPERM; | |
919 | break; | |
920 | ||
921 | case BT_RCVMTU: | |
1f435424 JH |
922 | if (!bdaddr_type_is_le(chan->src_type)) { |
923 | err = -EINVAL; | |
924 | break; | |
925 | } | |
926 | ||
927 | if (sk->sk_state == BT_CONNECTED) { | |
928 | err = -EISCONN; | |
929 | break; | |
930 | } | |
931 | ||
23bc6ab0 | 932 | if (get_user(opt, (u16 __user *) optval)) { |
1f435424 JH |
933 | err = -EFAULT; |
934 | break; | |
935 | } | |
936 | ||
937 | chan->imtu = opt; | |
938 | break; | |
939 | ||
33575df7 GP |
940 | default: |
941 | err = -ENOPROTOOPT; | |
942 | break; | |
943 | } | |
944 | ||
945 | release_sock(sk); | |
946 | return err; | |
947 | } | |
fd83ccdb | 948 | |
1b784140 YX |
949 | static int l2cap_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
950 | size_t len) | |
fd83ccdb GP |
951 | { |
952 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 953 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
954 | int err; |
955 | ||
956 | BT_DBG("sock %p, sk %p", sock, sk); | |
957 | ||
958 | err = sock_error(sk); | |
959 | if (err) | |
960 | return err; | |
961 | ||
962 | if (msg->msg_flags & MSG_OOB) | |
963 | return -EOPNOTSUPP; | |
964 | ||
a6a5568c | 965 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 966 | return -ENOTCONN; |
fd83ccdb | 967 | |
e793dcf0 JH |
968 | lock_sock(sk); |
969 | err = bt_sock_wait_ready(sk, msg->msg_flags); | |
970 | release_sock(sk); | |
971 | if (err) | |
972 | return err; | |
973 | ||
a6a5568c | 974 | l2cap_chan_lock(chan); |
8d46321c | 975 | err = l2cap_chan_send(chan, msg, len); |
a6a5568c | 976 | l2cap_chan_unlock(chan); |
fd83ccdb | 977 | |
fd83ccdb GP |
978 | return err; |
979 | } | |
33575df7 | 980 | |
1b784140 YX |
981 | static int l2cap_sock_recvmsg(struct socket *sock, struct msghdr *msg, |
982 | size_t len, int flags) | |
68983259 GP |
983 | { |
984 | struct sock *sk = sock->sk; | |
e328140f MM |
985 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
986 | int err; | |
68983259 GP |
987 | |
988 | lock_sock(sk); | |
989 | ||
c5daa683 GP |
990 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
991 | &bt_sk(sk)->flags)) { | |
38319713 JH |
992 | if (bdaddr_type_is_le(pi->chan->src_type)) { |
993 | sk->sk_state = BT_CONNECTED; | |
994 | pi->chan->state = BT_CONNECTED; | |
995 | __l2cap_le_connect_rsp_defer(pi->chan); | |
996 | } else { | |
997 | sk->sk_state = BT_CONFIG; | |
998 | pi->chan->state = BT_CONFIG; | |
999 | __l2cap_connect_rsp_defer(pi->chan); | |
1000 | } | |
8c1d787b | 1001 | |
970871bc JH |
1002 | err = 0; |
1003 | goto done; | |
68983259 GP |
1004 | } |
1005 | ||
1006 | release_sock(sk); | |
1007 | ||
1008 | if (sock->type == SOCK_STREAM) | |
1b784140 | 1009 | err = bt_sock_stream_recvmsg(sock, msg, len, flags); |
e328140f | 1010 | else |
1b784140 | 1011 | err = bt_sock_recvmsg(sock, msg, len, flags); |
e328140f MM |
1012 | |
1013 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
1014 | return err; | |
1015 | ||
1016 | /* Attempt to put pending rx data in the socket buffer */ | |
1017 | ||
1018 | lock_sock(sk); | |
1019 | ||
1020 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
1021 | goto done; | |
1022 | ||
1023 | if (pi->rx_busy_skb) { | |
dbb50887 | 1024 | if (!__sock_queue_rcv_skb(sk, pi->rx_busy_skb)) |
e328140f MM |
1025 | pi->rx_busy_skb = NULL; |
1026 | else | |
1027 | goto done; | |
1028 | } | |
1029 | ||
1030 | /* Restore data flow when half of the receive buffer is | |
1031 | * available. This avoids resending large numbers of | |
1032 | * frames. | |
1033 | */ | |
1034 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
1035 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 1036 | |
e328140f MM |
1037 | done: |
1038 | release_sock(sk); | |
1039 | return err; | |
68983259 GP |
1040 | } |
1041 | ||
05fc1576 GP |
1042 | /* Kill socket (only if zapped and orphan) |
1043 | * Must be called on unlocked socket. | |
1044 | */ | |
ba3bd0ee | 1045 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
1046 | { |
1047 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
1048 | return; | |
1049 | ||
e05dcc32 | 1050 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
1051 | |
1052 | /* Kill poor orphan */ | |
6ff5abbf | 1053 | |
4af66c69 | 1054 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
1055 | sock_set_flag(sk, SOCK_DEAD); |
1056 | sock_put(sk); | |
1057 | } | |
1058 | ||
f65468f6 | 1059 | static int __l2cap_wait_ack(struct sock *sk, struct l2cap_chan *chan) |
dc25306b | 1060 | { |
dc25306b GP |
1061 | DECLARE_WAITQUEUE(wait, current); |
1062 | int err = 0; | |
cb02a255 | 1063 | int timeo = L2CAP_WAIT_ACK_POLL_PERIOD; |
e432c72c DJ |
1064 | /* Timeout to prevent infinite loop */ |
1065 | unsigned long timeout = jiffies + L2CAP_WAIT_ACK_TIMEOUT; | |
dc25306b GP |
1066 | |
1067 | add_wait_queue(sk_sleep(sk), &wait); | |
1068 | set_current_state(TASK_INTERRUPTIBLE); | |
f65468f6 | 1069 | do { |
e432c72c DJ |
1070 | BT_DBG("Waiting for %d ACKs, timeout %04d ms", |
1071 | chan->unacked_frames, time_after(jiffies, timeout) ? 0 : | |
1072 | jiffies_to_msecs(timeout - jiffies)); | |
451e4c6c | 1073 | |
dc25306b | 1074 | if (!timeo) |
cb02a255 | 1075 | timeo = L2CAP_WAIT_ACK_POLL_PERIOD; |
dc25306b GP |
1076 | |
1077 | if (signal_pending(current)) { | |
1078 | err = sock_intr_errno(timeo); | |
1079 | break; | |
1080 | } | |
1081 | ||
1082 | release_sock(sk); | |
1083 | timeo = schedule_timeout(timeo); | |
1084 | lock_sock(sk); | |
1085 | set_current_state(TASK_INTERRUPTIBLE); | |
1086 | ||
1087 | err = sock_error(sk); | |
1088 | if (err) | |
1089 | break; | |
f65468f6 | 1090 | |
e432c72c DJ |
1091 | if (time_after(jiffies, timeout)) { |
1092 | err = -ENOLINK; | |
1093 | break; | |
1094 | } | |
1095 | ||
f65468f6 DJ |
1096 | } while (chan->unacked_frames > 0 && |
1097 | chan->state == BT_CONNECTED); | |
1098 | ||
dc25306b GP |
1099 | set_current_state(TASK_RUNNING); |
1100 | remove_wait_queue(sk_sleep(sk), &wait); | |
1101 | return err; | |
1102 | } | |
1103 | ||
dcba0dba GP |
1104 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1105 | { | |
1106 | struct sock *sk = sock->sk; | |
7ddb6e0f | 1107 | struct l2cap_chan *chan; |
3df91ea2 | 1108 | struct l2cap_conn *conn; |
dcba0dba GP |
1109 | int err = 0; |
1110 | ||
1111 | BT_DBG("sock %p, sk %p", sock, sk); | |
1112 | ||
1113 | if (!sk) | |
1114 | return 0; | |
1115 | ||
04ba72e6 DJ |
1116 | lock_sock(sk); |
1117 | ||
e7456437 DJ |
1118 | if (sk->sk_shutdown) |
1119 | goto shutdown_already; | |
1120 | ||
1121 | BT_DBG("Handling sock shutdown"); | |
1122 | ||
2baea85d DJ |
1123 | /* prevent sk structure from being freed whilst unlocked */ |
1124 | sock_hold(sk); | |
1125 | ||
7ddb6e0f | 1126 | chan = l2cap_pi(sk)->chan; |
2baea85d DJ |
1127 | /* prevent chan structure from being freed whilst unlocked */ |
1128 | l2cap_chan_hold(chan); | |
3df91ea2 | 1129 | |
49d11741 JH |
1130 | BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); |
1131 | ||
e7456437 DJ |
1132 | if (chan->mode == L2CAP_MODE_ERTM && |
1133 | chan->unacked_frames > 0 && | |
9f7378a9 | 1134 | chan->state == BT_CONNECTED) { |
e7456437 | 1135 | err = __l2cap_wait_ack(sk, chan); |
dcba0dba | 1136 | |
9f7378a9 DJ |
1137 | /* After waiting for ACKs, check whether shutdown |
1138 | * has already been actioned to close the L2CAP | |
1139 | * link such as by l2cap_disconnection_req(). | |
1140 | */ | |
1141 | if (sk->sk_shutdown) | |
1142 | goto has_shutdown; | |
1143 | } | |
1144 | ||
e7456437 | 1145 | sk->sk_shutdown = SHUTDOWN_MASK; |
e7456437 | 1146 | release_sock(sk); |
04ba72e6 DJ |
1147 | |
1148 | l2cap_chan_lock(chan); | |
1149 | conn = chan->conn; | |
1150 | if (conn) | |
1151 | /* prevent conn structure from being freed */ | |
1152 | l2cap_conn_get(conn); | |
1153 | l2cap_chan_unlock(chan); | |
1154 | ||
1155 | if (conn) | |
1156 | /* mutex lock must be taken before l2cap_chan_lock() */ | |
1157 | mutex_lock(&conn->chan_lock); | |
1158 | ||
1159 | l2cap_chan_lock(chan); | |
e7456437 | 1160 | l2cap_chan_close(chan, 0); |
04ba72e6 DJ |
1161 | l2cap_chan_unlock(chan); |
1162 | ||
1163 | if (conn) { | |
1164 | mutex_unlock(&conn->chan_lock); | |
1165 | l2cap_conn_put(conn); | |
1166 | } | |
1167 | ||
e7456437 | 1168 | lock_sock(sk); |
dcba0dba | 1169 | |
e7456437 DJ |
1170 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime && |
1171 | !(current->flags & PF_EXITING)) | |
1172 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
1173 | sk->sk_lingertime); | |
dcba0dba | 1174 | |
9f7378a9 | 1175 | has_shutdown: |
04ba72e6 DJ |
1176 | l2cap_chan_put(chan); |
1177 | sock_put(sk); | |
1178 | ||
1179 | shutdown_already: | |
dcba0dba GP |
1180 | if (!err && sk->sk_err) |
1181 | err = -sk->sk_err; | |
1182 | ||
1183 | release_sock(sk); | |
3df91ea2 | 1184 | |
04ba72e6 | 1185 | BT_DBG("Sock shutdown complete err: %d", err); |
451e4c6c | 1186 | |
dcba0dba GP |
1187 | return err; |
1188 | } | |
1189 | ||
554f05bb GP |
1190 | static int l2cap_sock_release(struct socket *sock) |
1191 | { | |
1192 | struct sock *sk = sock->sk; | |
1193 | int err; | |
1194 | ||
1195 | BT_DBG("sock %p, sk %p", sock, sk); | |
1196 | ||
1197 | if (!sk) | |
1198 | return 0; | |
1199 | ||
5b28d95c MY |
1200 | bt_sock_unlink(&l2cap_sk_list, sk); |
1201 | ||
554f05bb GP |
1202 | err = l2cap_sock_shutdown(sock, 2); |
1203 | ||
1204 | sock_orphan(sk); | |
1205 | l2cap_sock_kill(sk); | |
1206 | return err; | |
1207 | } | |
1208 | ||
c0df7f6e AE |
1209 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
1210 | { | |
1211 | struct sock *sk; | |
1212 | ||
49d11741 JH |
1213 | BT_DBG("parent %p state %s", parent, |
1214 | state_to_string(parent->sk_state)); | |
c0df7f6e AE |
1215 | |
1216 | /* Close not yet accepted channels */ | |
1217 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
1218 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
1219 | ||
49d11741 JH |
1220 | BT_DBG("child chan %p state %s", chan, |
1221 | state_to_string(chan->state)); | |
1222 | ||
c0df7f6e AE |
1223 | l2cap_chan_lock(chan); |
1224 | __clear_chan_timer(chan); | |
1225 | l2cap_chan_close(chan, ECONNRESET); | |
1226 | l2cap_chan_unlock(chan); | |
1227 | ||
1228 | l2cap_sock_kill(sk); | |
1229 | } | |
1230 | } | |
1231 | ||
80b98027 | 1232 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 1233 | { |
80b98027 | 1234 | struct sock *sk, *parent = chan->data; |
80808e43 | 1235 | |
8ffb9290 GP |
1236 | lock_sock(parent); |
1237 | ||
53826692 GP |
1238 | /* Check for backlog size */ |
1239 | if (sk_acceptq_is_full(parent)) { | |
1240 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
8a96f3cd | 1241 | release_sock(parent); |
53826692 GP |
1242 | return NULL; |
1243 | } | |
1244 | ||
80808e43 | 1245 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
11aa9c28 | 1246 | GFP_ATOMIC, 0); |
8a96f3cd JT |
1247 | if (!sk) { |
1248 | release_sock(parent); | |
80808e43 | 1249 | return NULL; |
8a96f3cd | 1250 | } |
80808e43 | 1251 | |
d22015aa OP |
1252 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
1253 | ||
80808e43 GP |
1254 | l2cap_sock_init(sk, parent); |
1255 | ||
644912e1 GP |
1256 | bt_accept_enqueue(parent, sk); |
1257 | ||
8ffb9290 GP |
1258 | release_sock(parent); |
1259 | ||
80808e43 GP |
1260 | return l2cap_pi(sk)->chan; |
1261 | } | |
1262 | ||
80b98027 | 1263 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 1264 | { |
80b98027 | 1265 | struct sock *sk = chan->data; |
84b34d98 | 1266 | int err; |
e328140f | 1267 | |
6be36555 AE |
1268 | lock_sock(sk); |
1269 | ||
84b34d98 | 1270 | if (l2cap_pi(sk)->rx_busy_skb) { |
6be36555 AE |
1271 | err = -ENOMEM; |
1272 | goto done; | |
1273 | } | |
e328140f | 1274 | |
dbb50887 DB |
1275 | if (chan->mode != L2CAP_MODE_ERTM && |
1276 | chan->mode != L2CAP_MODE_STREAMING) { | |
1277 | /* Even if no filter is attached, we could potentially | |
1278 | * get errors from security modules, etc. | |
1279 | */ | |
1280 | err = sk_filter(sk, skb); | |
1281 | if (err) | |
1282 | goto done; | |
1283 | } | |
1284 | ||
1285 | err = __sock_queue_rcv_skb(sk, skb); | |
e328140f MM |
1286 | |
1287 | /* For ERTM, handle one skb that doesn't fit into the recv | |
1288 | * buffer. This is important to do because the data frames | |
1289 | * have already been acked, so the skb cannot be discarded. | |
1290 | * | |
1291 | * Notify the l2cap core that the buffer is full, so the | |
1292 | * LOCAL_BUSY state is entered and no more frames are | |
1293 | * acked and reassembled until there is buffer space | |
1294 | * available. | |
1295 | */ | |
84b34d98 MH |
1296 | if (err < 0 && chan->mode == L2CAP_MODE_ERTM) { |
1297 | l2cap_pi(sk)->rx_busy_skb = skb; | |
1298 | l2cap_chan_busy(chan, 1); | |
e328140f MM |
1299 | err = 0; |
1300 | } | |
23070494 | 1301 | |
6be36555 AE |
1302 | done: |
1303 | release_sock(sk); | |
1304 | ||
e328140f | 1305 | return err; |
23070494 GP |
1306 | } |
1307 | ||
80b98027 | 1308 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 1309 | { |
80b98027 | 1310 | struct sock *sk = chan->data; |
ba3bd0ee GP |
1311 | |
1312 | l2cap_sock_kill(sk); | |
1313 | } | |
1314 | ||
c0df7f6e AE |
1315 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
1316 | { | |
1317 | struct sock *sk = chan->data; | |
1318 | struct sock *parent; | |
1319 | ||
49d11741 JH |
1320 | BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); |
1321 | ||
3b2ab39e JH |
1322 | /* This callback can be called both for server (BT_LISTEN) |
1323 | * sockets as well as "normal" ones. To avoid lockdep warnings | |
1324 | * with child socket locking (through l2cap_sock_cleanup_listen) | |
1325 | * we need separation into separate nesting levels. The simplest | |
1326 | * way to accomplish this is to inherit the nesting level used | |
1327 | * for the channel. | |
1328 | */ | |
1329 | lock_sock_nested(sk, atomic_read(&chan->nesting)); | |
c0df7f6e AE |
1330 | |
1331 | parent = bt_sk(sk)->parent; | |
1332 | ||
1333 | sock_set_flag(sk, SOCK_ZAPPED); | |
1334 | ||
1335 | switch (chan->state) { | |
1336 | case BT_OPEN: | |
1337 | case BT_BOUND: | |
1338 | case BT_CLOSED: | |
1339 | break; | |
1340 | case BT_LISTEN: | |
1341 | l2cap_sock_cleanup_listen(sk); | |
1342 | sk->sk_state = BT_CLOSED; | |
1343 | chan->state = BT_CLOSED; | |
1344 | ||
1345 | break; | |
1346 | default: | |
1347 | sk->sk_state = BT_CLOSED; | |
1348 | chan->state = BT_CLOSED; | |
1349 | ||
1350 | sk->sk_err = err; | |
1351 | ||
1352 | if (parent) { | |
1353 | bt_accept_unlink(sk); | |
676d2369 | 1354 | parent->sk_data_ready(parent); |
c0df7f6e AE |
1355 | } else { |
1356 | sk->sk_state_change(sk); | |
1357 | } | |
1358 | ||
1359 | break; | |
1360 | } | |
1361 | ||
1362 | release_sock(sk); | |
1363 | } | |
1364 | ||
53f52121 GP |
1365 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state, |
1366 | int err) | |
89bc500e | 1367 | { |
80b98027 | 1368 | struct sock *sk = chan->data; |
89bc500e GP |
1369 | |
1370 | sk->sk_state = state; | |
53f52121 GP |
1371 | |
1372 | if (err) | |
1373 | sk->sk_err = err; | |
89bc500e GP |
1374 | } |
1375 | ||
2f7719ce | 1376 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
d9fbd02b | 1377 | unsigned long hdr_len, |
90338947 | 1378 | unsigned long len, int nb) |
2f7719ce | 1379 | { |
0f2c6153 | 1380 | struct sock *sk = chan->data; |
90338947 GP |
1381 | struct sk_buff *skb; |
1382 | int err; | |
1383 | ||
a6a5568c | 1384 | l2cap_chan_unlock(chan); |
d9fbd02b | 1385 | skb = bt_skb_send_alloc(sk, hdr_len + len, nb, &err); |
a6a5568c MM |
1386 | l2cap_chan_lock(chan); |
1387 | ||
90338947 GP |
1388 | if (!skb) |
1389 | return ERR_PTR(err); | |
2f7719ce | 1390 | |
8d46321c MH |
1391 | skb->priority = sk->sk_priority; |
1392 | ||
a4368ff3 | 1393 | bt_cb(skb)->l2cap.chan = chan; |
0e790c64 | 1394 | |
90338947 | 1395 | return skb; |
2f7719ce AE |
1396 | } |
1397 | ||
54a59aa2 AE |
1398 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1399 | { | |
1400 | struct sock *sk = chan->data; | |
1401 | struct sock *parent; | |
1402 | ||
1403 | lock_sock(sk); | |
1404 | ||
1405 | parent = bt_sk(sk)->parent; | |
1406 | ||
1407 | BT_DBG("sk %p, parent %p", sk, parent); | |
1408 | ||
1409 | sk->sk_state = BT_CONNECTED; | |
1410 | sk->sk_state_change(sk); | |
1411 | ||
1412 | if (parent) | |
676d2369 | 1413 | parent->sk_data_ready(parent); |
54a59aa2 AE |
1414 | |
1415 | release_sock(sk); | |
1416 | } | |
1417 | ||
2dc4e510 GP |
1418 | static void l2cap_sock_defer_cb(struct l2cap_chan *chan) |
1419 | { | |
acdcabf5 GP |
1420 | struct sock *parent, *sk = chan->data; |
1421 | ||
1422 | lock_sock(sk); | |
2dc4e510 | 1423 | |
acdcabf5 | 1424 | parent = bt_sk(sk)->parent; |
2dc4e510 | 1425 | if (parent) |
676d2369 | 1426 | parent->sk_data_ready(parent); |
acdcabf5 GP |
1427 | |
1428 | release_sock(sk); | |
2dc4e510 GP |
1429 | } |
1430 | ||
d97c899b MH |
1431 | static void l2cap_sock_resume_cb(struct l2cap_chan *chan) |
1432 | { | |
1433 | struct sock *sk = chan->data; | |
1434 | ||
d52deb17 JH |
1435 | if (test_and_clear_bit(FLAG_PENDING_SECURITY, &chan->flags)) { |
1436 | sk->sk_state = BT_CONNECTED; | |
1437 | chan->state = BT_CONNECTED; | |
1438 | } | |
1439 | ||
d97c899b MH |
1440 | clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
1441 | sk->sk_state_change(sk); | |
1442 | } | |
1443 | ||
5ec1bbe5 GP |
1444 | static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan) |
1445 | { | |
1446 | struct sock *sk = chan->data; | |
1447 | ||
1448 | lock_sock(sk); | |
1449 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1450 | release_sock(sk); | |
1451 | } | |
1452 | ||
8d836d71 GP |
1453 | static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan) |
1454 | { | |
1455 | struct sock *sk = chan->data; | |
1456 | ||
1457 | return sk->sk_sndtimeo; | |
1458 | } | |
1459 | ||
837776f7 JH |
1460 | static void l2cap_sock_suspend_cb(struct l2cap_chan *chan) |
1461 | { | |
1462 | struct sock *sk = chan->data; | |
1463 | ||
1464 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); | |
1465 | sk->sk_state_change(sk); | |
1466 | } | |
1467 | ||
67f86a45 | 1468 | static const struct l2cap_ops l2cap_chan_ops = { |
0498878b JR |
1469 | .name = "L2CAP Socket Interface", |
1470 | .new_connection = l2cap_sock_new_connection_cb, | |
1471 | .recv = l2cap_sock_recv_cb, | |
1472 | .close = l2cap_sock_close_cb, | |
1473 | .teardown = l2cap_sock_teardown_cb, | |
1474 | .state_change = l2cap_sock_state_change_cb, | |
1475 | .ready = l2cap_sock_ready_cb, | |
1476 | .defer = l2cap_sock_defer_cb, | |
1477 | .resume = l2cap_sock_resume_cb, | |
1478 | .suspend = l2cap_sock_suspend_cb, | |
1479 | .set_shutdown = l2cap_sock_set_shutdown_cb, | |
1480 | .get_sndtimeo = l2cap_sock_get_sndtimeo_cb, | |
1481 | .alloc_skb = l2cap_sock_alloc_skb_cb, | |
80808e43 GP |
1482 | }; |
1483 | ||
bb58f747 GP |
1484 | static void l2cap_sock_destruct(struct sock *sk) |
1485 | { | |
1486 | BT_DBG("sk %p", sk); | |
1487 | ||
23d3a869 SL |
1488 | if (l2cap_pi(sk)->chan) |
1489 | l2cap_chan_put(l2cap_pi(sk)->chan); | |
84b34d98 | 1490 | |
e328140f MM |
1491 | if (l2cap_pi(sk)->rx_busy_skb) { |
1492 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1493 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1494 | } | |
1495 | ||
bb58f747 GP |
1496 | skb_queue_purge(&sk->sk_receive_queue); |
1497 | skb_queue_purge(&sk->sk_write_queue); | |
1498 | } | |
1499 | ||
2edf870d MH |
1500 | static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name, |
1501 | int *msg_namelen) | |
1502 | { | |
342dfc30 | 1503 | DECLARE_SOCKADDR(struct sockaddr_l2 *, la, msg_name); |
2edf870d MH |
1504 | |
1505 | memset(la, 0, sizeof(struct sockaddr_l2)); | |
1506 | la->l2_family = AF_BLUETOOTH; | |
a4368ff3 JH |
1507 | la->l2_psm = bt_cb(skb)->l2cap.psm; |
1508 | bacpy(&la->l2_bdaddr, &bt_cb(skb)->l2cap.bdaddr); | |
2edf870d MH |
1509 | |
1510 | *msg_namelen = sizeof(struct sockaddr_l2); | |
1511 | } | |
1512 | ||
80808e43 | 1513 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 | 1514 | { |
84b34d98 | 1515 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
bb58f747 GP |
1516 | |
1517 | BT_DBG("sk %p", sk); | |
1518 | ||
1519 | if (parent) { | |
b4450035 GP |
1520 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1521 | ||
bb58f747 | 1522 | sk->sk_type = parent->sk_type; |
c5daa683 | 1523 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1524 | |
715ec005 | 1525 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1526 | chan->imtu = pchan->imtu; |
1527 | chan->omtu = pchan->omtu; | |
b4450035 | 1528 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1529 | chan->mode = pchan->mode; |
47d1ec61 GP |
1530 | chan->fcs = pchan->fcs; |
1531 | chan->max_tx = pchan->max_tx; | |
1532 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1533 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1534 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1535 | chan->flags = pchan->flags; |
0cd75f7e JH |
1536 | chan->tx_credits = pchan->tx_credits; |
1537 | chan->rx_credits = pchan->rx_credits; | |
6230c9b4 | 1538 | |
7a8e5a31 JH |
1539 | if (chan->chan_type == L2CAP_CHAN_FIXED) { |
1540 | chan->scid = pchan->scid; | |
1541 | chan->dcid = pchan->scid; | |
1542 | } | |
1543 | ||
6230c9b4 | 1544 | security_sk_clone(parent, sk); |
bb58f747 | 1545 | } else { |
715ec005 GP |
1546 | switch (sk->sk_type) { |
1547 | case SOCK_RAW: | |
1548 | chan->chan_type = L2CAP_CHAN_RAW; | |
1549 | break; | |
1550 | case SOCK_DGRAM: | |
1551 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
2edf870d | 1552 | bt_sk(sk)->skb_msg_name = l2cap_skb_msg_name; |
715ec005 GP |
1553 | break; |
1554 | case SOCK_SEQPACKET: | |
1555 | case SOCK_STREAM: | |
1556 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1557 | break; | |
1558 | } | |
1559 | ||
0c1bc5c6 GP |
1560 | chan->imtu = L2CAP_DEFAULT_MTU; |
1561 | chan->omtu = 0; | |
bb58f747 | 1562 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1563 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1564 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1565 | } else { |
0c1bc5c6 | 1566 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1567 | } |
bd4b1653 AE |
1568 | |
1569 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1570 | } |
1571 | ||
1572 | /* Default config options */ | |
0c1bc5c6 | 1573 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1574 | |
1575 | chan->data = sk; | |
1576 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1577 | } |
1578 | ||
1579 | static struct proto l2cap_proto = { | |
1580 | .name = "L2CAP", | |
1581 | .owner = THIS_MODULE, | |
1582 | .obj_size = sizeof(struct l2cap_pinfo) | |
1583 | }; | |
1584 | ||
2d792818 | 1585 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
11aa9c28 | 1586 | int proto, gfp_t prio, int kern) |
bb58f747 GP |
1587 | { |
1588 | struct sock *sk; | |
dc50a06d | 1589 | struct l2cap_chan *chan; |
bb58f747 | 1590 | |
11aa9c28 | 1591 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto, kern); |
bb58f747 GP |
1592 | if (!sk) |
1593 | return NULL; | |
1594 | ||
1595 | sock_init_data(sock, sk); | |
1596 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1597 | ||
1598 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1599 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1600 | |
1601 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1602 | ||
1603 | sk->sk_protocol = proto; | |
1604 | sk->sk_state = BT_OPEN; | |
1605 | ||
eef1d9b6 | 1606 | chan = l2cap_chan_create(); |
dc50a06d | 1607 | if (!chan) { |
49dfbb91 | 1608 | sk_free(sk); |
dc50a06d GP |
1609 | return NULL; |
1610 | } | |
1611 | ||
61d6ef3e MM |
1612 | l2cap_chan_hold(chan); |
1613 | ||
dc50a06d GP |
1614 | l2cap_pi(sk)->chan = chan; |
1615 | ||
bb58f747 GP |
1616 | return sk; |
1617 | } | |
1618 | ||
1619 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1620 | int kern) | |
1621 | { | |
1622 | struct sock *sk; | |
1623 | ||
1624 | BT_DBG("sock %p", sock); | |
1625 | ||
1626 | sock->state = SS_UNCONNECTED; | |
1627 | ||
1628 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
2d792818 | 1629 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
bb58f747 GP |
1630 | return -ESOCKTNOSUPPORT; |
1631 | ||
1632 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1633 | return -EPERM; | |
1634 | ||
1635 | sock->ops = &l2cap_sock_ops; | |
1636 | ||
11aa9c28 | 1637 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern); |
bb58f747 GP |
1638 | if (!sk) |
1639 | return -ENOMEM; | |
1640 | ||
1641 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1642 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1643 | return 0; |
1644 | } | |
1645 | ||
cf2f90f5 | 1646 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1647 | .family = PF_BLUETOOTH, |
1648 | .owner = THIS_MODULE, | |
1649 | .release = l2cap_sock_release, | |
1650 | .bind = l2cap_sock_bind, | |
1651 | .connect = l2cap_sock_connect, | |
1652 | .listen = l2cap_sock_listen, | |
1653 | .accept = l2cap_sock_accept, | |
1654 | .getname = l2cap_sock_getname, | |
1655 | .sendmsg = l2cap_sock_sendmsg, | |
1656 | .recvmsg = l2cap_sock_recvmsg, | |
1657 | .poll = bt_sock_poll, | |
1658 | .ioctl = bt_sock_ioctl, | |
1659 | .mmap = sock_no_mmap, | |
1660 | .socketpair = sock_no_socketpair, | |
1661 | .shutdown = l2cap_sock_shutdown, | |
1662 | .setsockopt = l2cap_sock_setsockopt, | |
1663 | .getsockopt = l2cap_sock_getsockopt | |
1664 | }; | |
1665 | ||
bb58f747 GP |
1666 | static const struct net_proto_family l2cap_sock_family_ops = { |
1667 | .family = PF_BLUETOOTH, | |
1668 | .owner = THIS_MODULE, | |
1669 | .create = l2cap_sock_create, | |
1670 | }; | |
1671 | ||
1672 | int __init l2cap_init_sockets(void) | |
1673 | { | |
e2174ca4 | 1674 | int err; |
bb58f747 | 1675 | |
dd625558 MH |
1676 | BUILD_BUG_ON(sizeof(struct sockaddr_l2) > sizeof(struct sockaddr)); |
1677 | ||
e2174ca4 GP |
1678 | err = proto_register(&l2cap_proto, 0); |
1679 | if (err < 0) | |
1680 | return err; | |
bb58f747 | 1681 | |
e2174ca4 | 1682 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1683 | if (err < 0) { |
1684 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1685 | goto error; |
5b28d95c MY |
1686 | } |
1687 | ||
b0316615 | 1688 | err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list, |
2d792818 | 1689 | NULL); |
5b28d95c MY |
1690 | if (err < 0) { |
1691 | BT_ERR("Failed to create L2CAP proc file"); | |
1692 | bt_sock_unregister(BTPROTO_L2CAP); | |
1693 | goto error; | |
1694 | } | |
bb58f747 | 1695 | |
e2174ca4 | 1696 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1697 | |
e2174ca4 | 1698 | return 0; |
bb58f747 GP |
1699 | |
1700 | error: | |
e2174ca4 GP |
1701 | proto_unregister(&l2cap_proto); |
1702 | return err; | |
bb58f747 GP |
1703 | } |
1704 | ||
1705 | void l2cap_cleanup_sockets(void) | |
1706 | { | |
5b28d95c | 1707 | bt_procfs_cleanup(&init_net, "l2cap"); |
5e9d7f86 | 1708 | bt_sock_unregister(BTPROTO_L2CAP); |
e2174ca4 | 1709 | proto_unregister(&l2cap_proto); |
bb58f747 | 1710 | } |