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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 | ||
30 | static struct proto llcp_sock_proto = { | |
31 | .name = "NFC_LLCP", | |
32 | .owner = THIS_MODULE, | |
33 | .obj_size = sizeof(struct nfc_llcp_sock), | |
34 | }; | |
35 | ||
36 | static int llcp_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) | |
37 | { | |
38 | struct sock *sk = sock->sk; | |
39 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
40 | struct nfc_llcp_local *local; | |
41 | struct nfc_dev *dev; | |
42 | struct sockaddr_nfc_llcp llcp_addr; | |
43 | int len, ret = 0; | |
44 | ||
45 | pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family); | |
46 | ||
47 | if (!addr || addr->sa_family != AF_NFC) | |
48 | return -EINVAL; | |
49 | ||
50 | memset(&llcp_addr, 0, sizeof(llcp_addr)); | |
51 | len = min_t(unsigned int, sizeof(llcp_addr), alen); | |
52 | memcpy(&llcp_addr, addr, len); | |
53 | ||
54 | /* This is going to be a listening socket, dsap must be 0 */ | |
55 | if (llcp_addr.dsap != 0) | |
56 | return -EINVAL; | |
57 | ||
58 | lock_sock(sk); | |
59 | ||
60 | if (sk->sk_state != LLCP_CLOSED) { | |
61 | ret = -EBADFD; | |
62 | goto error; | |
63 | } | |
64 | ||
65 | dev = nfc_get_device(llcp_addr.dev_idx); | |
66 | if (dev == NULL) { | |
67 | ret = -ENODEV; | |
68 | goto error; | |
69 | } | |
70 | ||
71 | local = nfc_llcp_find_local(dev); | |
72 | if (local == NULL) { | |
73 | ret = -ENODEV; | |
74 | goto put_dev; | |
75 | } | |
76 | ||
77 | llcp_sock->dev = dev; | |
78 | llcp_sock->local = local; | |
79 | llcp_sock->nfc_protocol = llcp_addr.nfc_protocol; | |
80 | llcp_sock->service_name_len = min_t(unsigned int, | |
427a2eb1 SO |
81 | llcp_addr.service_name_len, |
82 | NFC_LLCP_MAX_SERVICE_NAME); | |
d646960f | 83 | llcp_sock->service_name = kmemdup(llcp_addr.service_name, |
427a2eb1 SO |
84 | llcp_sock->service_name_len, |
85 | GFP_KERNEL); | |
d646960f SO |
86 | |
87 | llcp_sock->ssap = nfc_llcp_get_sdp_ssap(local, llcp_sock); | |
88 | if (llcp_sock->ssap == LLCP_MAX_SAP) | |
89 | goto put_dev; | |
90 | ||
91 | local->sockets[llcp_sock->ssap] = llcp_sock; | |
92 | ||
93 | pr_debug("Socket bound to SAP %d\n", llcp_sock->ssap); | |
94 | ||
95 | sk->sk_state = LLCP_BOUND; | |
96 | ||
97 | put_dev: | |
98 | nfc_put_device(dev); | |
99 | ||
100 | error: | |
101 | release_sock(sk); | |
102 | return ret; | |
103 | } | |
104 | ||
105 | static int llcp_sock_listen(struct socket *sock, int backlog) | |
106 | { | |
107 | struct sock *sk = sock->sk; | |
108 | int ret = 0; | |
109 | ||
110 | pr_debug("sk %p backlog %d\n", sk, backlog); | |
111 | ||
112 | lock_sock(sk); | |
113 | ||
114 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) | |
427a2eb1 | 115 | || sk->sk_state != LLCP_BOUND) { |
d646960f SO |
116 | ret = -EBADFD; |
117 | goto error; | |
118 | } | |
119 | ||
120 | sk->sk_max_ack_backlog = backlog; | |
121 | sk->sk_ack_backlog = 0; | |
122 | ||
123 | pr_debug("Socket listening\n"); | |
124 | sk->sk_state = LLCP_LISTEN; | |
125 | ||
126 | error: | |
127 | release_sock(sk); | |
128 | ||
129 | return ret; | |
130 | } | |
131 | ||
132 | void nfc_llcp_accept_unlink(struct sock *sk) | |
133 | { | |
134 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
135 | ||
136 | pr_debug("state %d\n", sk->sk_state); | |
137 | ||
138 | list_del_init(&llcp_sock->accept_queue); | |
139 | sk_acceptq_removed(llcp_sock->parent); | |
140 | llcp_sock->parent = NULL; | |
141 | ||
142 | sock_put(sk); | |
143 | } | |
144 | ||
145 | void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk) | |
146 | { | |
147 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
148 | struct nfc_llcp_sock *llcp_sock_parent = nfc_llcp_sock(parent); | |
149 | ||
150 | /* Lock will be free from unlink */ | |
151 | sock_hold(sk); | |
152 | ||
153 | list_add_tail(&llcp_sock->accept_queue, | |
427a2eb1 | 154 | &llcp_sock_parent->accept_queue); |
d646960f SO |
155 | llcp_sock->parent = parent; |
156 | sk_acceptq_added(parent); | |
157 | } | |
158 | ||
159 | struct sock *nfc_llcp_accept_dequeue(struct sock *parent, | |
427a2eb1 | 160 | struct socket *newsock) |
d646960f SO |
161 | { |
162 | struct nfc_llcp_sock *lsk, *n, *llcp_parent; | |
163 | struct sock *sk; | |
164 | ||
165 | llcp_parent = nfc_llcp_sock(parent); | |
166 | ||
167 | list_for_each_entry_safe(lsk, n, &llcp_parent->accept_queue, | |
427a2eb1 | 168 | accept_queue) { |
d646960f SO |
169 | sk = &lsk->sk; |
170 | lock_sock(sk); | |
171 | ||
172 | if (sk->sk_state == LLCP_CLOSED) { | |
173 | release_sock(sk); | |
174 | nfc_llcp_accept_unlink(sk); | |
175 | continue; | |
176 | } | |
177 | ||
178 | if (sk->sk_state == LLCP_CONNECTED || !newsock) { | |
179 | nfc_llcp_accept_unlink(sk); | |
180 | if (newsock) | |
181 | sock_graft(sk, newsock); | |
182 | ||
183 | release_sock(sk); | |
184 | ||
185 | pr_debug("Returning sk state %d\n", sk->sk_state); | |
186 | ||
187 | return sk; | |
188 | } | |
189 | ||
190 | release_sock(sk); | |
191 | } | |
192 | ||
193 | return NULL; | |
194 | } | |
195 | ||
196 | static int llcp_sock_accept(struct socket *sock, struct socket *newsock, | |
427a2eb1 | 197 | int flags) |
d646960f SO |
198 | { |
199 | DECLARE_WAITQUEUE(wait, current); | |
200 | struct sock *sk = sock->sk, *new_sk; | |
201 | long timeo; | |
202 | int ret = 0; | |
203 | ||
204 | pr_debug("parent %p\n", sk); | |
205 | ||
206 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
207 | ||
208 | if (sk->sk_state != LLCP_LISTEN) { | |
209 | ret = -EBADFD; | |
210 | goto error; | |
211 | } | |
212 | ||
213 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
214 | ||
215 | /* Wait for an incoming connection. */ | |
216 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
217 | while (!(new_sk = nfc_llcp_accept_dequeue(sk, newsock))) { | |
218 | set_current_state(TASK_INTERRUPTIBLE); | |
219 | ||
220 | if (!timeo) { | |
221 | ret = -EAGAIN; | |
222 | break; | |
223 | } | |
224 | ||
225 | if (signal_pending(current)) { | |
226 | ret = sock_intr_errno(timeo); | |
227 | break; | |
228 | } | |
229 | ||
230 | release_sock(sk); | |
231 | timeo = schedule_timeout(timeo); | |
232 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
233 | } | |
234 | __set_current_state(TASK_RUNNING); | |
235 | remove_wait_queue(sk_sleep(sk), &wait); | |
236 | ||
237 | if (ret) | |
238 | goto error; | |
239 | ||
240 | newsock->state = SS_CONNECTED; | |
241 | ||
242 | pr_debug("new socket %p\n", new_sk); | |
243 | ||
244 | error: | |
245 | release_sock(sk); | |
246 | ||
247 | return ret; | |
248 | } | |
249 | ||
250 | static int llcp_sock_getname(struct socket *sock, struct sockaddr *addr, | |
251 | int *len, int peer) | |
252 | { | |
427a2eb1 | 253 | struct sockaddr_nfc_llcp *llcp_addr = (struct sockaddr_nfc_llcp *)addr; |
d646960f SO |
254 | struct sock *sk = sock->sk; |
255 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
256 | ||
257 | pr_debug("%p\n", sk); | |
258 | ||
259 | addr->sa_family = AF_NFC; | |
260 | *len = sizeof(struct sockaddr_nfc_llcp); | |
261 | ||
262 | llcp_addr->dev_idx = llcp_sock->dev->idx; | |
263 | llcp_addr->dsap = llcp_sock->dsap; | |
264 | llcp_addr->ssap = llcp_sock->ssap; | |
265 | llcp_addr->service_name_len = llcp_sock->service_name_len; | |
266 | memcpy(llcp_addr->service_name, llcp_sock->service_name, | |
427a2eb1 | 267 | llcp_addr->service_name_len); |
d646960f SO |
268 | |
269 | return 0; | |
270 | } | |
271 | ||
272 | static inline unsigned int llcp_accept_poll(struct sock *parent) | |
273 | { | |
274 | struct nfc_llcp_sock *llcp_sock, *n, *parent_sock; | |
275 | struct sock *sk; | |
276 | ||
277 | parent_sock = nfc_llcp_sock(parent); | |
278 | ||
279 | list_for_each_entry_safe(llcp_sock, n, &parent_sock->accept_queue, | |
427a2eb1 | 280 | accept_queue) { |
d646960f SO |
281 | sk = &llcp_sock->sk; |
282 | ||
283 | if (sk->sk_state == LLCP_CONNECTED) | |
284 | return POLLIN | POLLRDNORM; | |
285 | } | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
290 | static unsigned int llcp_sock_poll(struct file *file, struct socket *sock, | |
427a2eb1 | 291 | poll_table *wait) |
d646960f SO |
292 | { |
293 | struct sock *sk = sock->sk; | |
294 | unsigned int mask = 0; | |
295 | ||
296 | pr_debug("%p\n", sk); | |
297 | ||
298 | sock_poll_wait(file, sk_sleep(sk), wait); | |
299 | ||
300 | if (sk->sk_state == LLCP_LISTEN) | |
301 | return llcp_accept_poll(sk); | |
302 | ||
303 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
304 | mask |= POLLERR; | |
305 | ||
306 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
307 | mask |= POLLIN; | |
308 | ||
309 | if (sk->sk_state == LLCP_CLOSED) | |
310 | mask |= POLLHUP; | |
311 | ||
312 | return mask; | |
313 | } | |
314 | ||
315 | static int llcp_sock_release(struct socket *sock) | |
316 | { | |
317 | struct sock *sk = sock->sk; | |
318 | struct nfc_llcp_local *local; | |
319 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
40c75f81 | 320 | int err = 0; |
d646960f SO |
321 | |
322 | if (!sk) | |
323 | return 0; | |
324 | ||
325 | pr_debug("%p\n", sk); | |
326 | ||
327 | local = llcp_sock->local; | |
40c75f81 SO |
328 | if (local == NULL) { |
329 | err = -ENODEV; | |
330 | goto out; | |
331 | } | |
d646960f SO |
332 | |
333 | mutex_lock(&local->socket_lock); | |
334 | ||
0c318359 | 335 | if (llcp_sock == local->sockets[llcp_sock->ssap]) |
d646960f | 336 | local->sockets[llcp_sock->ssap] = NULL; |
0c318359 | 337 | else |
40c75f81 | 338 | list_del_init(&llcp_sock->list); |
d646960f SO |
339 | |
340 | mutex_unlock(&local->socket_lock); | |
341 | ||
342 | lock_sock(sk); | |
343 | ||
344 | /* Send a DISC */ | |
345 | if (sk->sk_state == LLCP_CONNECTED) | |
346 | nfc_llcp_disconnect(llcp_sock); | |
347 | ||
348 | if (sk->sk_state == LLCP_LISTEN) { | |
349 | struct nfc_llcp_sock *lsk, *n; | |
350 | struct sock *accept_sk; | |
351 | ||
352 | list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue, | |
427a2eb1 | 353 | accept_queue) { |
d646960f SO |
354 | accept_sk = &lsk->sk; |
355 | lock_sock(accept_sk); | |
356 | ||
357 | nfc_llcp_disconnect(lsk); | |
358 | nfc_llcp_accept_unlink(accept_sk); | |
359 | ||
360 | release_sock(accept_sk); | |
361 | ||
d646960f | 362 | sock_orphan(accept_sk); |
d646960f SO |
363 | } |
364 | } | |
365 | ||
366 | /* Freeing the SAP */ | |
367 | if ((sk->sk_state == LLCP_CONNECTED | |
427a2eb1 SO |
368 | && llcp_sock->ssap > LLCP_LOCAL_SAP_OFFSET) || |
369 | sk->sk_state == LLCP_BOUND || sk->sk_state == LLCP_LISTEN) | |
d646960f SO |
370 | nfc_llcp_put_ssap(llcp_sock->local, llcp_sock->ssap); |
371 | ||
d646960f SO |
372 | release_sock(sk); |
373 | ||
40c75f81 | 374 | out: |
d646960f SO |
375 | sock_orphan(sk); |
376 | sock_put(sk); | |
377 | ||
40c75f81 | 378 | return err; |
d646960f SO |
379 | } |
380 | ||
381 | static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr, | |
427a2eb1 | 382 | int len, int flags) |
d646960f SO |
383 | { |
384 | struct sock *sk = sock->sk; | |
385 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
386 | struct sockaddr_nfc_llcp *addr = (struct sockaddr_nfc_llcp *)_addr; | |
387 | struct nfc_dev *dev; | |
388 | struct nfc_llcp_local *local; | |
389 | int ret = 0; | |
390 | ||
391 | pr_debug("sock %p sk %p flags 0x%x\n", sock, sk, flags); | |
392 | ||
393 | if (!addr || len < sizeof(struct sockaddr_nfc) || | |
427a2eb1 | 394 | addr->sa_family != AF_NFC) { |
d646960f SO |
395 | pr_err("Invalid socket\n"); |
396 | return -EINVAL; | |
397 | } | |
398 | ||
399 | if (addr->service_name_len == 0 && addr->dsap == 0) { | |
400 | pr_err("Missing service name or dsap\n"); | |
401 | return -EINVAL; | |
402 | } | |
403 | ||
404 | pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n", addr->dev_idx, | |
427a2eb1 | 405 | addr->target_idx, addr->nfc_protocol); |
d646960f SO |
406 | |
407 | lock_sock(sk); | |
408 | ||
409 | if (sk->sk_state == LLCP_CONNECTED) { | |
410 | ret = -EISCONN; | |
411 | goto error; | |
412 | } | |
413 | ||
414 | dev = nfc_get_device(addr->dev_idx); | |
415 | if (dev == NULL) { | |
416 | ret = -ENODEV; | |
417 | goto error; | |
418 | } | |
419 | ||
420 | local = nfc_llcp_find_local(dev); | |
421 | if (local == NULL) { | |
422 | ret = -ENODEV; | |
423 | goto put_dev; | |
424 | } | |
425 | ||
426 | device_lock(&dev->dev); | |
427 | if (dev->dep_link_up == false) { | |
428 | ret = -ENOLINK; | |
429 | device_unlock(&dev->dev); | |
430 | goto put_dev; | |
431 | } | |
432 | device_unlock(&dev->dev); | |
433 | ||
434 | if (local->rf_mode == NFC_RF_INITIATOR && | |
427a2eb1 | 435 | addr->target_idx != local->target_idx) { |
d646960f SO |
436 | ret = -ENOLINK; |
437 | goto put_dev; | |
438 | } | |
439 | ||
440 | llcp_sock->dev = dev; | |
441 | llcp_sock->local = local; | |
442 | llcp_sock->ssap = nfc_llcp_get_local_ssap(local); | |
443 | if (llcp_sock->ssap == LLCP_SAP_MAX) { | |
444 | ret = -ENOMEM; | |
445 | goto put_dev; | |
446 | } | |
447 | if (addr->service_name_len == 0) | |
448 | llcp_sock->dsap = addr->dsap; | |
449 | else | |
450 | llcp_sock->dsap = LLCP_SAP_SDP; | |
451 | llcp_sock->nfc_protocol = addr->nfc_protocol; | |
452 | llcp_sock->service_name_len = min_t(unsigned int, | |
427a2eb1 SO |
453 | addr->service_name_len, |
454 | NFC_LLCP_MAX_SERVICE_NAME); | |
d646960f | 455 | llcp_sock->service_name = kmemdup(addr->service_name, |
427a2eb1 SO |
456 | llcp_sock->service_name_len, |
457 | GFP_KERNEL); | |
d646960f SO |
458 | |
459 | local->sockets[llcp_sock->ssap] = llcp_sock; | |
460 | ||
461 | ret = nfc_llcp_send_connect(llcp_sock); | |
462 | if (ret) | |
463 | goto put_dev; | |
464 | ||
465 | sk->sk_state = LLCP_CONNECTED; | |
466 | ||
467 | release_sock(sk); | |
468 | return 0; | |
469 | ||
470 | put_dev: | |
471 | nfc_put_device(dev); | |
472 | ||
473 | error: | |
474 | release_sock(sk); | |
475 | return ret; | |
476 | } | |
477 | ||
53a0ac2e | 478 | static int llcp_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
427a2eb1 | 479 | struct msghdr *msg, size_t len) |
53a0ac2e SO |
480 | { |
481 | struct sock *sk = sock->sk; | |
482 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
483 | int ret; | |
484 | ||
485 | pr_debug("sock %p sk %p", sock, sk); | |
486 | ||
487 | ret = sock_error(sk); | |
488 | if (ret) | |
489 | return ret; | |
490 | ||
491 | if (msg->msg_flags & MSG_OOB) | |
492 | return -EOPNOTSUPP; | |
493 | ||
494 | lock_sock(sk); | |
495 | ||
496 | if (sk->sk_state != LLCP_CONNECTED) { | |
497 | release_sock(sk); | |
498 | return -ENOTCONN; | |
499 | } | |
500 | ||
501 | release_sock(sk); | |
502 | ||
503 | return nfc_llcp_send_i_frame(llcp_sock, msg, len); | |
504 | } | |
505 | ||
d646960f SO |
506 | static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
507 | struct msghdr *msg, size_t len, int flags) | |
508 | { | |
509 | int noblock = flags & MSG_DONTWAIT; | |
510 | struct sock *sk = sock->sk; | |
511 | unsigned int copied, rlen; | |
512 | struct sk_buff *skb, *cskb; | |
513 | int err = 0; | |
514 | ||
515 | pr_debug("%p %zu\n", sk, len); | |
516 | ||
517 | lock_sock(sk); | |
518 | ||
519 | if (sk->sk_state == LLCP_CLOSED && | |
427a2eb1 | 520 | skb_queue_empty(&sk->sk_receive_queue)) { |
d646960f SO |
521 | release_sock(sk); |
522 | return 0; | |
523 | } | |
524 | ||
525 | release_sock(sk); | |
526 | ||
527 | if (flags & (MSG_OOB)) | |
528 | return -EOPNOTSUPP; | |
529 | ||
530 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
531 | if (!skb) { | |
532 | pr_err("Recv datagram failed state %d %d %d", | |
427a2eb1 | 533 | sk->sk_state, err, sock_error(sk)); |
d646960f SO |
534 | |
535 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
536 | return 0; | |
537 | ||
538 | return err; | |
539 | } | |
540 | ||
427a2eb1 | 541 | rlen = skb->len; /* real length of skb */ |
d646960f SO |
542 | copied = min_t(unsigned int, rlen, len); |
543 | ||
544 | cskb = skb; | |
545 | if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) { | |
546 | if (!(flags & MSG_PEEK)) | |
547 | skb_queue_head(&sk->sk_receive_queue, skb); | |
548 | return -EFAULT; | |
549 | } | |
550 | ||
551 | /* Mark read part of skb as used */ | |
552 | if (!(flags & MSG_PEEK)) { | |
553 | ||
554 | /* SOCK_STREAM: re-queue skb if it contains unreceived data */ | |
555 | if (sk->sk_type == SOCK_STREAM) { | |
556 | skb_pull(skb, copied); | |
557 | if (skb->len) { | |
558 | skb_queue_head(&sk->sk_receive_queue, skb); | |
559 | goto done; | |
560 | } | |
561 | } | |
562 | ||
563 | kfree_skb(skb); | |
564 | } | |
565 | ||
566 | /* XXX Queue backlogged skbs */ | |
567 | ||
568 | done: | |
569 | /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */ | |
570 | if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC)) | |
571 | copied = rlen; | |
572 | ||
573 | return copied; | |
574 | } | |
575 | ||
576 | static const struct proto_ops llcp_sock_ops = { | |
577 | .family = PF_NFC, | |
578 | .owner = THIS_MODULE, | |
579 | .bind = llcp_sock_bind, | |
580 | .connect = llcp_sock_connect, | |
581 | .release = llcp_sock_release, | |
582 | .socketpair = sock_no_socketpair, | |
583 | .accept = llcp_sock_accept, | |
584 | .getname = llcp_sock_getname, | |
585 | .poll = llcp_sock_poll, | |
586 | .ioctl = sock_no_ioctl, | |
587 | .listen = llcp_sock_listen, | |
588 | .shutdown = sock_no_shutdown, | |
589 | .setsockopt = sock_no_setsockopt, | |
590 | .getsockopt = sock_no_getsockopt, | |
53a0ac2e | 591 | .sendmsg = llcp_sock_sendmsg, |
d646960f SO |
592 | .recvmsg = llcp_sock_recvmsg, |
593 | .mmap = sock_no_mmap, | |
594 | }; | |
595 | ||
596 | static void llcp_sock_destruct(struct sock *sk) | |
597 | { | |
598 | struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); | |
599 | ||
600 | pr_debug("%p\n", sk); | |
601 | ||
602 | if (sk->sk_state == LLCP_CONNECTED) | |
603 | nfc_put_device(llcp_sock->dev); | |
604 | ||
605 | skb_queue_purge(&sk->sk_receive_queue); | |
606 | ||
607 | nfc_llcp_sock_free(llcp_sock); | |
608 | ||
609 | if (!sock_flag(sk, SOCK_DEAD)) { | |
610 | pr_err("Freeing alive NFC LLCP socket %p\n", sk); | |
611 | return; | |
612 | } | |
613 | } | |
614 | ||
615 | struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp) | |
616 | { | |
617 | struct sock *sk; | |
618 | struct nfc_llcp_sock *llcp_sock; | |
619 | ||
620 | sk = sk_alloc(&init_net, PF_NFC, gfp, &llcp_sock_proto); | |
621 | if (!sk) | |
622 | return NULL; | |
623 | ||
624 | llcp_sock = nfc_llcp_sock(sk); | |
625 | ||
626 | sock_init_data(sock, sk); | |
627 | sk->sk_state = LLCP_CLOSED; | |
628 | sk->sk_protocol = NFC_SOCKPROTO_LLCP; | |
629 | sk->sk_type = type; | |
630 | sk->sk_destruct = llcp_sock_destruct; | |
631 | ||
632 | llcp_sock->ssap = 0; | |
633 | llcp_sock->dsap = LLCP_SAP_SDP; | |
634 | llcp_sock->send_n = llcp_sock->send_ack_n = 0; | |
635 | llcp_sock->recv_n = llcp_sock->recv_ack_n = 0; | |
636 | llcp_sock->remote_ready = 1; | |
637 | skb_queue_head_init(&llcp_sock->tx_queue); | |
638 | skb_queue_head_init(&llcp_sock->tx_pending_queue); | |
639 | skb_queue_head_init(&llcp_sock->tx_backlog_queue); | |
640 | INIT_LIST_HEAD(&llcp_sock->list); | |
641 | INIT_LIST_HEAD(&llcp_sock->accept_queue); | |
642 | ||
643 | if (sock != NULL) | |
644 | sock->state = SS_UNCONNECTED; | |
645 | ||
646 | return sk; | |
647 | } | |
648 | ||
649 | void nfc_llcp_sock_free(struct nfc_llcp_sock *sock) | |
650 | { | |
40c75f81 SO |
651 | struct nfc_llcp_local *local = sock->local; |
652 | ||
d646960f SO |
653 | kfree(sock->service_name); |
654 | ||
655 | skb_queue_purge(&sock->tx_queue); | |
656 | skb_queue_purge(&sock->tx_pending_queue); | |
657 | skb_queue_purge(&sock->tx_backlog_queue); | |
658 | ||
659 | list_del_init(&sock->accept_queue); | |
660 | ||
40c75f81 SO |
661 | if (local != NULL && sock == local->sockets[sock->ssap]) |
662 | local->sockets[sock->ssap] = NULL; | |
663 | else | |
664 | list_del_init(&sock->list); | |
665 | ||
d646960f SO |
666 | sock->parent = NULL; |
667 | } | |
668 | ||
669 | static int llcp_sock_create(struct net *net, struct socket *sock, | |
427a2eb1 | 670 | const struct nfc_protocol *nfc_proto) |
d646960f SO |
671 | { |
672 | struct sock *sk; | |
673 | ||
674 | pr_debug("%p\n", sock); | |
675 | ||
676 | if (sock->type != SOCK_STREAM && sock->type != SOCK_DGRAM) | |
677 | return -ESOCKTNOSUPPORT; | |
678 | ||
679 | sock->ops = &llcp_sock_ops; | |
680 | ||
681 | sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC); | |
682 | if (sk == NULL) | |
683 | return -ENOMEM; | |
684 | ||
685 | return 0; | |
686 | } | |
687 | ||
688 | static const struct nfc_protocol llcp_nfc_proto = { | |
689 | .id = NFC_SOCKPROTO_LLCP, | |
690 | .proto = &llcp_sock_proto, | |
691 | .owner = THIS_MODULE, | |
692 | .create = llcp_sock_create | |
693 | }; | |
694 | ||
695 | int __init nfc_llcp_sock_init(void) | |
696 | { | |
697 | return nfc_proto_register(&llcp_nfc_proto); | |
698 | } | |
699 | ||
700 | void nfc_llcp_sock_exit(void) | |
701 | { | |
702 | nfc_proto_unregister(&llcp_nfc_proto); | |
703 | } |