Commit | Line | Data |
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d646960f SO |
1 | /* |
2 | * Copyright (C) 2011 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the | |
16 | * Free Software Foundation, Inc., | |
17 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
18 | */ | |
19 | ||
20 | #define pr_fmt(fmt) "llcp: %s: " fmt, __func__ | |
21 | ||
22 | #include <linux/init.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/nfc.h> | |
26 | ||
27 | #include "../nfc.h" | |
28 | #include "llcp.h" | |
29 | ||
ff353d86 SO |
30 | static int sock_wait_state(struct sock *sk, int state, unsigned long timeo) |
31 | { | |
32 | DECLARE_WAITQUEUE(wait, current); | |
33 | int err = 0; | |
34 | ||
35 | pr_debug("sk %p", sk); | |
36 | ||
37 | add_wait_queue(sk_sleep(sk), &wait); | |
38 | set_current_state(TASK_INTERRUPTIBLE); | |
39 | ||
40 | while (sk->sk_state != state) { | |
41 | if (!timeo) { | |
42 | err = -EINPROGRESS; | |
43 | break; | |
44 | } | |
45 | ||
46 | if (signal_pending(current)) { | |
47 | err = sock_intr_errno(timeo); | |
48 | break; | |
49 | } | |
50 | ||
51 | release_sock(sk); | |
52 | timeo = schedule_timeout(timeo); | |
53 | lock_sock(sk); | |
54 | set_current_state(TASK_INTERRUPTIBLE); | |
55 | ||
56 | err = sock_error(sk); | |
57 | if (err) | |
58 | break; | |
59 | } | |
60 | ||
61 | __set_current_state(TASK_RUNNING); | |
62 | remove_wait_queue(sk_sleep(sk), &wait); | |
63 | return err; | |
64 | } | |
65 | ||
d646960f SO |
66 | static struct proto llcp_sock_proto = { |
67 | .name = "NFC_LLCP", | |
68 | .owner = THIS_MODULE, | |
69 | .obj_size = sizeof(struct nfc_llcp_sock), | |
70 | }; | |
71 | ||
72 | static int llcp_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) | |
73 | { | |
74 | struct sock *sk = sock->sk; | |
75 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
76 | struct nfc_llcp_local *local; | |
77 | struct nfc_dev *dev; | |
78 | struct sockaddr_nfc_llcp llcp_addr; | |
79 | int len, ret = 0; | |
80 | ||
d646960f SO |
81 | if (!addr || addr->sa_family != AF_NFC) |
82 | return -EINVAL; | |
83 | ||
c66433dc SO |
84 | pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family); |
85 | ||
d646960f SO |
86 | memset(&llcp_addr, 0, sizeof(llcp_addr)); |
87 | len = min_t(unsigned int, sizeof(llcp_addr), alen); | |
88 | memcpy(&llcp_addr, addr, len); | |
89 | ||
90 | /* This is going to be a listening socket, dsap must be 0 */ | |
91 | if (llcp_addr.dsap != 0) | |
92 | return -EINVAL; | |
93 | ||
94 | lock_sock(sk); | |
95 | ||
96 | if (sk->sk_state != LLCP_CLOSED) { | |
97 | ret = -EBADFD; | |
98 | goto error; | |
99 | } | |
100 | ||
101 | dev = nfc_get_device(llcp_addr.dev_idx); | |
102 | if (dev == NULL) { | |
103 | ret = -ENODEV; | |
104 | goto error; | |
105 | } | |
106 | ||
107 | local = nfc_llcp_find_local(dev); | |
108 | if (local == NULL) { | |
109 | ret = -ENODEV; | |
110 | goto put_dev; | |
111 | } | |
112 | ||
113 | llcp_sock->dev = dev; | |
c7aa1225 | 114 | llcp_sock->local = nfc_llcp_local_get(local); |
d646960f SO |
115 | llcp_sock->nfc_protocol = llcp_addr.nfc_protocol; |
116 | llcp_sock->service_name_len = min_t(unsigned int, | |
427a2eb1 SO |
117 | llcp_addr.service_name_len, |
118 | NFC_LLCP_MAX_SERVICE_NAME); | |
d646960f | 119 | llcp_sock->service_name = kmemdup(llcp_addr.service_name, |
427a2eb1 SO |
120 | llcp_sock->service_name_len, |
121 | GFP_KERNEL); | |
d646960f SO |
122 | |
123 | llcp_sock->ssap = nfc_llcp_get_sdp_ssap(local, llcp_sock); | |
8b7e8eda SO |
124 | if (llcp_sock->ssap == LLCP_SAP_MAX) { |
125 | ret = -EADDRINUSE; | |
d646960f | 126 | goto put_dev; |
8b7e8eda | 127 | } |
d646960f | 128 | |
cbbf4721 SO |
129 | llcp_sock->reserved_ssap = llcp_sock->ssap; |
130 | ||
a69f32af | 131 | nfc_llcp_sock_link(&local->sockets, sk); |
d646960f SO |
132 | |
133 | pr_debug("Socket bound to SAP %d\n", llcp_sock->ssap); | |
134 | ||
135 | sk->sk_state = LLCP_BOUND; | |
136 | ||
137 | put_dev: | |
138 | nfc_put_device(dev); | |
139 | ||
140 | error: | |
141 | release_sock(sk); | |
142 | return ret; | |
143 | } | |
144 | ||
4463523b TE |
145 | static int llcp_raw_sock_bind(struct socket *sock, struct sockaddr *addr, |
146 | int alen) | |
147 | { | |
148 | struct sock *sk = sock->sk; | |
149 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
150 | struct nfc_llcp_local *local; | |
151 | struct nfc_dev *dev; | |
152 | struct sockaddr_nfc_llcp llcp_addr; | |
153 | int len, ret = 0; | |
154 | ||
155 | if (!addr || addr->sa_family != AF_NFC) | |
156 | return -EINVAL; | |
157 | ||
158 | pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family); | |
159 | ||
160 | memset(&llcp_addr, 0, sizeof(llcp_addr)); | |
161 | len = min_t(unsigned int, sizeof(llcp_addr), alen); | |
162 | memcpy(&llcp_addr, addr, len); | |
163 | ||
164 | lock_sock(sk); | |
165 | ||
166 | if (sk->sk_state != LLCP_CLOSED) { | |
167 | ret = -EBADFD; | |
168 | goto error; | |
169 | } | |
170 | ||
171 | dev = nfc_get_device(llcp_addr.dev_idx); | |
172 | if (dev == NULL) { | |
173 | ret = -ENODEV; | |
174 | goto error; | |
175 | } | |
176 | ||
177 | local = nfc_llcp_find_local(dev); | |
178 | if (local == NULL) { | |
179 | ret = -ENODEV; | |
180 | goto put_dev; | |
181 | } | |
182 | ||
183 | llcp_sock->dev = dev; | |
184 | llcp_sock->local = nfc_llcp_local_get(local); | |
185 | llcp_sock->nfc_protocol = llcp_addr.nfc_protocol; | |
186 | ||
187 | nfc_llcp_sock_link(&local->raw_sockets, sk); | |
188 | ||
189 | sk->sk_state = LLCP_BOUND; | |
190 | ||
191 | put_dev: | |
192 | nfc_put_device(dev); | |
193 | ||
194 | error: | |
195 | release_sock(sk); | |
196 | return ret; | |
197 | } | |
198 | ||
d646960f SO |
199 | static int llcp_sock_listen(struct socket *sock, int backlog) |
200 | { | |
201 | struct sock *sk = sock->sk; | |
202 | int ret = 0; | |
203 | ||
204 | pr_debug("sk %p backlog %d\n", sk, backlog); | |
205 | ||
206 | lock_sock(sk); | |
207 | ||
208 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) | |
427a2eb1 | 209 | || sk->sk_state != LLCP_BOUND) { |
d646960f SO |
210 | ret = -EBADFD; |
211 | goto error; | |
212 | } | |
213 | ||
214 | sk->sk_max_ack_backlog = backlog; | |
215 | sk->sk_ack_backlog = 0; | |
216 | ||
217 | pr_debug("Socket listening\n"); | |
218 | sk->sk_state = LLCP_LISTEN; | |
219 | ||
220 | error: | |
221 | release_sock(sk); | |
222 | ||
223 | return ret; | |
224 | } | |
225 | ||
226 | void nfc_llcp_accept_unlink(struct sock *sk) | |
227 | { | |
228 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
229 | ||
230 | pr_debug("state %d\n", sk->sk_state); | |
231 | ||
232 | list_del_init(&llcp_sock->accept_queue); | |
233 | sk_acceptq_removed(llcp_sock->parent); | |
234 | llcp_sock->parent = NULL; | |
235 | ||
236 | sock_put(sk); | |
237 | } | |
238 | ||
239 | void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk) | |
240 | { | |
241 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
242 | struct nfc_llcp_sock *llcp_sock_parent = nfc_llcp_sock(parent); | |
243 | ||
244 | /* Lock will be free from unlink */ | |
245 | sock_hold(sk); | |
246 | ||
247 | list_add_tail(&llcp_sock->accept_queue, | |
427a2eb1 | 248 | &llcp_sock_parent->accept_queue); |
d646960f SO |
249 | llcp_sock->parent = parent; |
250 | sk_acceptq_added(parent); | |
251 | } | |
252 | ||
253 | struct sock *nfc_llcp_accept_dequeue(struct sock *parent, | |
427a2eb1 | 254 | struct socket *newsock) |
d646960f SO |
255 | { |
256 | struct nfc_llcp_sock *lsk, *n, *llcp_parent; | |
257 | struct sock *sk; | |
258 | ||
259 | llcp_parent = nfc_llcp_sock(parent); | |
260 | ||
261 | list_for_each_entry_safe(lsk, n, &llcp_parent->accept_queue, | |
427a2eb1 | 262 | accept_queue) { |
d646960f SO |
263 | sk = &lsk->sk; |
264 | lock_sock(sk); | |
265 | ||
266 | if (sk->sk_state == LLCP_CLOSED) { | |
267 | release_sock(sk); | |
268 | nfc_llcp_accept_unlink(sk); | |
269 | continue; | |
270 | } | |
271 | ||
272 | if (sk->sk_state == LLCP_CONNECTED || !newsock) { | |
273 | nfc_llcp_accept_unlink(sk); | |
274 | if (newsock) | |
275 | sock_graft(sk, newsock); | |
276 | ||
277 | release_sock(sk); | |
278 | ||
279 | pr_debug("Returning sk state %d\n", sk->sk_state); | |
280 | ||
281 | return sk; | |
282 | } | |
283 | ||
284 | release_sock(sk); | |
285 | } | |
286 | ||
287 | return NULL; | |
288 | } | |
289 | ||
290 | static int llcp_sock_accept(struct socket *sock, struct socket *newsock, | |
427a2eb1 | 291 | int flags) |
d646960f SO |
292 | { |
293 | DECLARE_WAITQUEUE(wait, current); | |
294 | struct sock *sk = sock->sk, *new_sk; | |
295 | long timeo; | |
296 | int ret = 0; | |
297 | ||
298 | pr_debug("parent %p\n", sk); | |
299 | ||
300 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
301 | ||
302 | if (sk->sk_state != LLCP_LISTEN) { | |
303 | ret = -EBADFD; | |
304 | goto error; | |
305 | } | |
306 | ||
307 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
308 | ||
309 | /* Wait for an incoming connection. */ | |
310 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
311 | while (!(new_sk = nfc_llcp_accept_dequeue(sk, newsock))) { | |
312 | set_current_state(TASK_INTERRUPTIBLE); | |
313 | ||
314 | if (!timeo) { | |
315 | ret = -EAGAIN; | |
316 | break; | |
317 | } | |
318 | ||
319 | if (signal_pending(current)) { | |
320 | ret = sock_intr_errno(timeo); | |
321 | break; | |
322 | } | |
323 | ||
324 | release_sock(sk); | |
325 | timeo = schedule_timeout(timeo); | |
326 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
327 | } | |
328 | __set_current_state(TASK_RUNNING); | |
329 | remove_wait_queue(sk_sleep(sk), &wait); | |
330 | ||
331 | if (ret) | |
332 | goto error; | |
333 | ||
334 | newsock->state = SS_CONNECTED; | |
335 | ||
336 | pr_debug("new socket %p\n", new_sk); | |
337 | ||
338 | error: | |
339 | release_sock(sk); | |
340 | ||
341 | return ret; | |
342 | } | |
343 | ||
12e5bdfe | 344 | static int llcp_sock_getname(struct socket *sock, struct sockaddr *uaddr, |
d646960f SO |
345 | int *len, int peer) |
346 | { | |
d646960f SO |
347 | struct sock *sk = sock->sk; |
348 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
12e5bdfe | 349 | DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, llcp_addr, uaddr); |
d646960f | 350 | |
fe3c094a SO |
351 | if (llcp_sock == NULL || llcp_sock->dev == NULL) |
352 | return -EBADFD; | |
353 | ||
12e5bdfe SO |
354 | pr_debug("%p %d %d %d\n", sk, llcp_sock->target_idx, |
355 | llcp_sock->dsap, llcp_sock->ssap); | |
d646960f | 356 | |
12e5bdfe SO |
357 | uaddr->sa_family = AF_NFC; |
358 | ||
d646960f SO |
359 | *len = sizeof(struct sockaddr_nfc_llcp); |
360 | ||
361 | llcp_addr->dev_idx = llcp_sock->dev->idx; | |
12e5bdfe | 362 | llcp_addr->target_idx = llcp_sock->target_idx; |
d646960f SO |
363 | llcp_addr->dsap = llcp_sock->dsap; |
364 | llcp_addr->ssap = llcp_sock->ssap; | |
365 | llcp_addr->service_name_len = llcp_sock->service_name_len; | |
366 | memcpy(llcp_addr->service_name, llcp_sock->service_name, | |
427a2eb1 | 367 | llcp_addr->service_name_len); |
d646960f SO |
368 | |
369 | return 0; | |
370 | } | |
371 | ||
372 | static inline unsigned int llcp_accept_poll(struct sock *parent) | |
373 | { | |
374 | struct nfc_llcp_sock *llcp_sock, *n, *parent_sock; | |
375 | struct sock *sk; | |
376 | ||
377 | parent_sock = nfc_llcp_sock(parent); | |
378 | ||
379 | list_for_each_entry_safe(llcp_sock, n, &parent_sock->accept_queue, | |
427a2eb1 | 380 | accept_queue) { |
d646960f SO |
381 | sk = &llcp_sock->sk; |
382 | ||
383 | if (sk->sk_state == LLCP_CONNECTED) | |
384 | return POLLIN | POLLRDNORM; | |
385 | } | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
390 | static unsigned int llcp_sock_poll(struct file *file, struct socket *sock, | |
427a2eb1 | 391 | poll_table *wait) |
d646960f SO |
392 | { |
393 | struct sock *sk = sock->sk; | |
394 | unsigned int mask = 0; | |
395 | ||
396 | pr_debug("%p\n", sk); | |
397 | ||
398 | sock_poll_wait(file, sk_sleep(sk), wait); | |
399 | ||
400 | if (sk->sk_state == LLCP_LISTEN) | |
401 | return llcp_accept_poll(sk); | |
402 | ||
403 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
404 | mask |= POLLERR; | |
405 | ||
406 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
4260c13b | 407 | mask |= POLLIN | POLLRDNORM; |
d646960f SO |
408 | |
409 | if (sk->sk_state == LLCP_CLOSED) | |
410 | mask |= POLLHUP; | |
411 | ||
4260c13b SO |
412 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
413 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; | |
414 | ||
415 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
416 | mask |= POLLHUP; | |
417 | ||
418 | if (sock_writeable(sk)) | |
419 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
420 | else | |
421 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); | |
422 | ||
423 | pr_debug("mask 0x%x\n", mask); | |
424 | ||
d646960f SO |
425 | return mask; |
426 | } | |
427 | ||
428 | static int llcp_sock_release(struct socket *sock) | |
429 | { | |
430 | struct sock *sk = sock->sk; | |
431 | struct nfc_llcp_local *local; | |
432 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
40c75f81 | 433 | int err = 0; |
d646960f SO |
434 | |
435 | if (!sk) | |
436 | return 0; | |
437 | ||
438 | pr_debug("%p\n", sk); | |
439 | ||
440 | local = llcp_sock->local; | |
40c75f81 SO |
441 | if (local == NULL) { |
442 | err = -ENODEV; | |
443 | goto out; | |
444 | } | |
d646960f | 445 | |
d646960f SO |
446 | lock_sock(sk); |
447 | ||
448 | /* Send a DISC */ | |
449 | if (sk->sk_state == LLCP_CONNECTED) | |
450 | nfc_llcp_disconnect(llcp_sock); | |
451 | ||
452 | if (sk->sk_state == LLCP_LISTEN) { | |
453 | struct nfc_llcp_sock *lsk, *n; | |
454 | struct sock *accept_sk; | |
455 | ||
456 | list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue, | |
427a2eb1 | 457 | accept_queue) { |
d646960f SO |
458 | accept_sk = &lsk->sk; |
459 | lock_sock(accept_sk); | |
460 | ||
461 | nfc_llcp_disconnect(lsk); | |
462 | nfc_llcp_accept_unlink(accept_sk); | |
463 | ||
464 | release_sock(accept_sk); | |
465 | ||
d646960f | 466 | sock_orphan(accept_sk); |
d646960f SO |
467 | } |
468 | } | |
469 | ||
cbbf4721 SO |
470 | if (llcp_sock->reserved_ssap < LLCP_SAP_MAX) |
471 | nfc_llcp_put_ssap(llcp_sock->local, llcp_sock->ssap); | |
d646960f | 472 | |
d646960f SO |
473 | release_sock(sk); |
474 | ||
4463523b TE |
475 | if (sock->type == SOCK_RAW) |
476 | nfc_llcp_sock_unlink(&local->raw_sockets, sk); | |
477 | else | |
478 | nfc_llcp_sock_unlink(&local->sockets, sk); | |
a69f32af | 479 | |
40c75f81 | 480 | out: |
d646960f SO |
481 | sock_orphan(sk); |
482 | sock_put(sk); | |
483 | ||
40c75f81 | 484 | return err; |
d646960f SO |
485 | } |
486 | ||
487 | static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr, | |
427a2eb1 | 488 | int len, int flags) |
d646960f SO |
489 | { |
490 | struct sock *sk = sock->sk; | |
491 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
492 | struct sockaddr_nfc_llcp *addr = (struct sockaddr_nfc_llcp *)_addr; | |
493 | struct nfc_dev *dev; | |
494 | struct nfc_llcp_local *local; | |
495 | int ret = 0; | |
496 | ||
497 | pr_debug("sock %p sk %p flags 0x%x\n", sock, sk, flags); | |
498 | ||
499 | if (!addr || len < sizeof(struct sockaddr_nfc) || | |
32418cfe | 500 | addr->sa_family != AF_NFC) |
d646960f | 501 | return -EINVAL; |
d646960f | 502 | |
32418cfe | 503 | if (addr->service_name_len == 0 && addr->dsap == 0) |
d646960f | 504 | return -EINVAL; |
d646960f SO |
505 | |
506 | pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n", addr->dev_idx, | |
427a2eb1 | 507 | addr->target_idx, addr->nfc_protocol); |
d646960f SO |
508 | |
509 | lock_sock(sk); | |
510 | ||
511 | if (sk->sk_state == LLCP_CONNECTED) { | |
512 | ret = -EISCONN; | |
513 | goto error; | |
514 | } | |
515 | ||
516 | dev = nfc_get_device(addr->dev_idx); | |
517 | if (dev == NULL) { | |
518 | ret = -ENODEV; | |
519 | goto error; | |
520 | } | |
521 | ||
522 | local = nfc_llcp_find_local(dev); | |
523 | if (local == NULL) { | |
524 | ret = -ENODEV; | |
525 | goto put_dev; | |
526 | } | |
527 | ||
528 | device_lock(&dev->dev); | |
529 | if (dev->dep_link_up == false) { | |
530 | ret = -ENOLINK; | |
531 | device_unlock(&dev->dev); | |
532 | goto put_dev; | |
533 | } | |
534 | device_unlock(&dev->dev); | |
535 | ||
536 | if (local->rf_mode == NFC_RF_INITIATOR && | |
427a2eb1 | 537 | addr->target_idx != local->target_idx) { |
d646960f SO |
538 | ret = -ENOLINK; |
539 | goto put_dev; | |
540 | } | |
541 | ||
542 | llcp_sock->dev = dev; | |
c7aa1225 | 543 | llcp_sock->local = nfc_llcp_local_get(local); |
93d7e490 | 544 | llcp_sock->miu = llcp_sock->local->remote_miu; |
d646960f SO |
545 | llcp_sock->ssap = nfc_llcp_get_local_ssap(local); |
546 | if (llcp_sock->ssap == LLCP_SAP_MAX) { | |
547 | ret = -ENOMEM; | |
548 | goto put_dev; | |
549 | } | |
cbbf4721 SO |
550 | |
551 | llcp_sock->reserved_ssap = llcp_sock->ssap; | |
552 | ||
d646960f SO |
553 | if (addr->service_name_len == 0) |
554 | llcp_sock->dsap = addr->dsap; | |
555 | else | |
556 | llcp_sock->dsap = LLCP_SAP_SDP; | |
557 | llcp_sock->nfc_protocol = addr->nfc_protocol; | |
558 | llcp_sock->service_name_len = min_t(unsigned int, | |
427a2eb1 SO |
559 | addr->service_name_len, |
560 | NFC_LLCP_MAX_SERVICE_NAME); | |
d646960f | 561 | llcp_sock->service_name = kmemdup(addr->service_name, |
427a2eb1 SO |
562 | llcp_sock->service_name_len, |
563 | GFP_KERNEL); | |
d646960f | 564 | |
a69f32af | 565 | nfc_llcp_sock_link(&local->connecting_sockets, sk); |
d646960f SO |
566 | |
567 | ret = nfc_llcp_send_connect(llcp_sock); | |
568 | if (ret) | |
a69f32af | 569 | goto sock_unlink; |
d646960f | 570 | |
ff353d86 SO |
571 | ret = sock_wait_state(sk, LLCP_CONNECTED, |
572 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
573 | if (ret) | |
a69f32af | 574 | goto sock_unlink; |
d646960f SO |
575 | |
576 | release_sock(sk); | |
ff353d86 | 577 | |
d646960f SO |
578 | return 0; |
579 | ||
a69f32af SO |
580 | sock_unlink: |
581 | nfc_llcp_put_ssap(local, llcp_sock->ssap); | |
582 | ||
583 | nfc_llcp_sock_unlink(&local->connecting_sockets, sk); | |
584 | ||
d646960f SO |
585 | put_dev: |
586 | nfc_put_device(dev); | |
587 | ||
588 | error: | |
589 | release_sock(sk); | |
590 | return ret; | |
591 | } | |
592 | ||
53a0ac2e | 593 | static int llcp_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
427a2eb1 | 594 | struct msghdr *msg, size_t len) |
53a0ac2e SO |
595 | { |
596 | struct sock *sk = sock->sk; | |
597 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
598 | int ret; | |
599 | ||
600 | pr_debug("sock %p sk %p", sock, sk); | |
601 | ||
602 | ret = sock_error(sk); | |
603 | if (ret) | |
604 | return ret; | |
605 | ||
606 | if (msg->msg_flags & MSG_OOB) | |
607 | return -EOPNOTSUPP; | |
608 | ||
609 | lock_sock(sk); | |
610 | ||
611 | if (sk->sk_state != LLCP_CONNECTED) { | |
612 | release_sock(sk); | |
613 | return -ENOTCONN; | |
614 | } | |
615 | ||
616 | release_sock(sk); | |
617 | ||
618 | return nfc_llcp_send_i_frame(llcp_sock, msg, len); | |
619 | } | |
620 | ||
d646960f SO |
621 | static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
622 | struct msghdr *msg, size_t len, int flags) | |
623 | { | |
624 | int noblock = flags & MSG_DONTWAIT; | |
625 | struct sock *sk = sock->sk; | |
626 | unsigned int copied, rlen; | |
627 | struct sk_buff *skb, *cskb; | |
628 | int err = 0; | |
629 | ||
630 | pr_debug("%p %zu\n", sk, len); | |
631 | ||
632 | lock_sock(sk); | |
633 | ||
634 | if (sk->sk_state == LLCP_CLOSED && | |
427a2eb1 | 635 | skb_queue_empty(&sk->sk_receive_queue)) { |
d646960f SO |
636 | release_sock(sk); |
637 | return 0; | |
638 | } | |
639 | ||
640 | release_sock(sk); | |
641 | ||
642 | if (flags & (MSG_OOB)) | |
643 | return -EOPNOTSUPP; | |
644 | ||
645 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
646 | if (!skb) { | |
647 | pr_err("Recv datagram failed state %d %d %d", | |
427a2eb1 | 648 | sk->sk_state, err, sock_error(sk)); |
d646960f SO |
649 | |
650 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
651 | return 0; | |
652 | ||
653 | return err; | |
654 | } | |
655 | ||
427a2eb1 | 656 | rlen = skb->len; /* real length of skb */ |
d646960f SO |
657 | copied = min_t(unsigned int, rlen, len); |
658 | ||
659 | cskb = skb; | |
660 | if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) { | |
661 | if (!(flags & MSG_PEEK)) | |
662 | skb_queue_head(&sk->sk_receive_queue, skb); | |
663 | return -EFAULT; | |
664 | } | |
665 | ||
666 | /* Mark read part of skb as used */ | |
667 | if (!(flags & MSG_PEEK)) { | |
668 | ||
669 | /* SOCK_STREAM: re-queue skb if it contains unreceived data */ | |
4463523b | 670 | if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_RAW) { |
d646960f SO |
671 | skb_pull(skb, copied); |
672 | if (skb->len) { | |
673 | skb_queue_head(&sk->sk_receive_queue, skb); | |
674 | goto done; | |
675 | } | |
676 | } | |
677 | ||
678 | kfree_skb(skb); | |
679 | } | |
680 | ||
681 | /* XXX Queue backlogged skbs */ | |
682 | ||
683 | done: | |
684 | /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */ | |
685 | if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC)) | |
686 | copied = rlen; | |
687 | ||
688 | return copied; | |
689 | } | |
690 | ||
691 | static const struct proto_ops llcp_sock_ops = { | |
692 | .family = PF_NFC, | |
693 | .owner = THIS_MODULE, | |
694 | .bind = llcp_sock_bind, | |
695 | .connect = llcp_sock_connect, | |
696 | .release = llcp_sock_release, | |
697 | .socketpair = sock_no_socketpair, | |
698 | .accept = llcp_sock_accept, | |
699 | .getname = llcp_sock_getname, | |
700 | .poll = llcp_sock_poll, | |
701 | .ioctl = sock_no_ioctl, | |
702 | .listen = llcp_sock_listen, | |
703 | .shutdown = sock_no_shutdown, | |
704 | .setsockopt = sock_no_setsockopt, | |
705 | .getsockopt = sock_no_getsockopt, | |
53a0ac2e | 706 | .sendmsg = llcp_sock_sendmsg, |
d646960f SO |
707 | .recvmsg = llcp_sock_recvmsg, |
708 | .mmap = sock_no_mmap, | |
709 | }; | |
710 | ||
4463523b TE |
711 | static const struct proto_ops llcp_rawsock_ops = { |
712 | .family = PF_NFC, | |
713 | .owner = THIS_MODULE, | |
714 | .bind = llcp_raw_sock_bind, | |
715 | .connect = sock_no_connect, | |
716 | .release = llcp_sock_release, | |
717 | .socketpair = sock_no_socketpair, | |
718 | .accept = sock_no_accept, | |
719 | .getname = llcp_sock_getname, | |
720 | .poll = llcp_sock_poll, | |
721 | .ioctl = sock_no_ioctl, | |
722 | .listen = sock_no_listen, | |
723 | .shutdown = sock_no_shutdown, | |
724 | .setsockopt = sock_no_setsockopt, | |
725 | .getsockopt = sock_no_getsockopt, | |
726 | .sendmsg = sock_no_sendmsg, | |
727 | .recvmsg = llcp_sock_recvmsg, | |
728 | .mmap = sock_no_mmap, | |
729 | }; | |
730 | ||
d646960f SO |
731 | static void llcp_sock_destruct(struct sock *sk) |
732 | { | |
733 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
734 | ||
735 | pr_debug("%p\n", sk); | |
736 | ||
737 | if (sk->sk_state == LLCP_CONNECTED) | |
738 | nfc_put_device(llcp_sock->dev); | |
739 | ||
740 | skb_queue_purge(&sk->sk_receive_queue); | |
741 | ||
742 | nfc_llcp_sock_free(llcp_sock); | |
743 | ||
744 | if (!sock_flag(sk, SOCK_DEAD)) { | |
745 | pr_err("Freeing alive NFC LLCP socket %p\n", sk); | |
746 | return; | |
747 | } | |
748 | } | |
749 | ||
750 | struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp) | |
751 | { | |
752 | struct sock *sk; | |
753 | struct nfc_llcp_sock *llcp_sock; | |
754 | ||
755 | sk = sk_alloc(&init_net, PF_NFC, gfp, &llcp_sock_proto); | |
756 | if (!sk) | |
757 | return NULL; | |
758 | ||
759 | llcp_sock = nfc_llcp_sock(sk); | |
760 | ||
761 | sock_init_data(sock, sk); | |
762 | sk->sk_state = LLCP_CLOSED; | |
763 | sk->sk_protocol = NFC_SOCKPROTO_LLCP; | |
764 | sk->sk_type = type; | |
765 | sk->sk_destruct = llcp_sock_destruct; | |
766 | ||
767 | llcp_sock->ssap = 0; | |
768 | llcp_sock->dsap = LLCP_SAP_SDP; | |
7a06e586 | 769 | llcp_sock->rw = LLCP_DEFAULT_RW; |
93d7e490 | 770 | llcp_sock->miu = LLCP_DEFAULT_MIU; |
d646960f SO |
771 | llcp_sock->send_n = llcp_sock->send_ack_n = 0; |
772 | llcp_sock->recv_n = llcp_sock->recv_ack_n = 0; | |
773 | llcp_sock->remote_ready = 1; | |
cbbf4721 | 774 | llcp_sock->reserved_ssap = LLCP_SAP_MAX; |
d646960f SO |
775 | skb_queue_head_init(&llcp_sock->tx_queue); |
776 | skb_queue_head_init(&llcp_sock->tx_pending_queue); | |
777 | skb_queue_head_init(&llcp_sock->tx_backlog_queue); | |
d646960f SO |
778 | INIT_LIST_HEAD(&llcp_sock->accept_queue); |
779 | ||
780 | if (sock != NULL) | |
781 | sock->state = SS_UNCONNECTED; | |
782 | ||
783 | return sk; | |
784 | } | |
785 | ||
786 | void nfc_llcp_sock_free(struct nfc_llcp_sock *sock) | |
787 | { | |
788 | kfree(sock->service_name); | |
789 | ||
790 | skb_queue_purge(&sock->tx_queue); | |
791 | skb_queue_purge(&sock->tx_pending_queue); | |
792 | skb_queue_purge(&sock->tx_backlog_queue); | |
793 | ||
794 | list_del_init(&sock->accept_queue); | |
40c75f81 | 795 | |
d646960f | 796 | sock->parent = NULL; |
c7aa1225 SO |
797 | |
798 | nfc_llcp_local_put(sock->local); | |
d646960f SO |
799 | } |
800 | ||
801 | static int llcp_sock_create(struct net *net, struct socket *sock, | |
427a2eb1 | 802 | const struct nfc_protocol *nfc_proto) |
d646960f SO |
803 | { |
804 | struct sock *sk; | |
805 | ||
806 | pr_debug("%p\n", sock); | |
807 | ||
4463523b TE |
808 | if (sock->type != SOCK_STREAM && |
809 | sock->type != SOCK_DGRAM && | |
810 | sock->type != SOCK_RAW) | |
d646960f SO |
811 | return -ESOCKTNOSUPPORT; |
812 | ||
4463523b TE |
813 | if (sock->type == SOCK_RAW) |
814 | sock->ops = &llcp_rawsock_ops; | |
815 | else | |
816 | sock->ops = &llcp_sock_ops; | |
d646960f SO |
817 | |
818 | sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC); | |
819 | if (sk == NULL) | |
820 | return -ENOMEM; | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | static const struct nfc_protocol llcp_nfc_proto = { | |
826 | .id = NFC_SOCKPROTO_LLCP, | |
827 | .proto = &llcp_sock_proto, | |
828 | .owner = THIS_MODULE, | |
829 | .create = llcp_sock_create | |
830 | }; | |
831 | ||
832 | int __init nfc_llcp_sock_init(void) | |
833 | { | |
834 | return nfc_proto_register(&llcp_nfc_proto); | |
835 | } | |
836 | ||
837 | void nfc_llcp_sock_exit(void) | |
838 | { | |
839 | nfc_proto_unregister(&llcp_nfc_proto); | |
840 | } |