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NFC: LLCP raw socket support
[deliverable/linux.git] / net / nfc / llcp / sock.c
CommitLineData
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		 30static 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		 66static struct proto llcp_sock_proto = {
67 .name = "NFC_LLCP",
68 .owner = THIS_MODULE,
69 .obj_size = sizeof(struct nfc_llcp_sock),
70};
71
72static 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
137put_dev:
138 nfc_put_device(dev);
139
140error:
141 release_sock(sk);
142 return ret;
143}
144
4463523b
TE		 145static 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
191put_dev:
192 nfc_put_device(dev);
193
194error:
195 release_sock(sk);
196 return ret;
197}
198
d646960f
SO		 199static 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
220error:
221 release_sock(sk);
222
223 return ret;
224}
225
226void 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
239void 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
253struct 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
290static 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
338error:
339 release_sock(sk);
340
341 return ret;
342}
343
12e5bdfe 344static 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
372static 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
390static 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
428static 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 480out:
d646960f
SO		 481 sock_orphan(sk);
482 sock_put(sk);
483
40c75f81 484 return err;
d646960f
SO		 485}
486
487static 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) ||
427a2eb1 500 addr->sa_family != AF_NFC) {
d646960f
SO		 501 pr_err("Invalid socket\n");
502 return -EINVAL;
503 }
504
505 if (addr->service_name_len == 0 && addr->dsap == 0) {
506 pr_err("Missing service name or dsap\n");
507 return -EINVAL;
508 }
509
510 pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n", addr->dev_idx,
427a2eb1 511 addr->target_idx, addr->nfc_protocol);
d646960f
SO		 512
513 lock_sock(sk);
514
515 if (sk->sk_state == LLCP_CONNECTED) {
516 ret = -EISCONN;
517 goto error;
518 }
519
520 dev = nfc_get_device(addr->dev_idx);
521 if (dev == NULL) {
522 ret = -ENODEV;
523 goto error;
524 }
525
526 local = nfc_llcp_find_local(dev);
527 if (local == NULL) {
528 ret = -ENODEV;
529 goto put_dev;
530 }
531
532 device_lock(&dev->dev);
533 if (dev->dep_link_up == false) {
534 ret = -ENOLINK;
535 device_unlock(&dev->dev);
536 goto put_dev;
537 }
538 device_unlock(&dev->dev);
539
540 if (local->rf_mode == NFC_RF_INITIATOR &&
427a2eb1 541 addr->target_idx != local->target_idx) {
d646960f
SO		 542 ret = -ENOLINK;
543 goto put_dev;
544 }
545
546 llcp_sock->dev = dev;
c7aa1225 547 llcp_sock->local = nfc_llcp_local_get(local);
93d7e490 548 llcp_sock->miu = llcp_sock->local->remote_miu;
d646960f
SO		 549 llcp_sock->ssap = nfc_llcp_get_local_ssap(local);
550 if (llcp_sock->ssap == LLCP_SAP_MAX) {
551 ret = -ENOMEM;
552 goto put_dev;
553 }
cbbf4721
SO		 554
555 llcp_sock->reserved_ssap = llcp_sock->ssap;
556
d646960f
SO		 557 if (addr->service_name_len == 0)
558 llcp_sock->dsap = addr->dsap;
559 else
560 llcp_sock->dsap = LLCP_SAP_SDP;
561 llcp_sock->nfc_protocol = addr->nfc_protocol;
562 llcp_sock->service_name_len = min_t(unsigned int,
427a2eb1
SO		 563 addr->service_name_len,
564 NFC_LLCP_MAX_SERVICE_NAME);
d646960f 565 llcp_sock->service_name = kmemdup(addr->service_name,
427a2eb1
SO		 566 llcp_sock->service_name_len,
567 GFP_KERNEL);
d646960f 568
a69f32af 569 nfc_llcp_sock_link(&local->connecting_sockets, sk);
d646960f
SO		 570
571 ret = nfc_llcp_send_connect(llcp_sock);
572 if (ret)
a69f32af 573 goto sock_unlink;
d646960f 574
ff353d86
SO		 575 ret = sock_wait_state(sk, LLCP_CONNECTED,
576 sock_sndtimeo(sk, flags & O_NONBLOCK));
577 if (ret)
a69f32af 578 goto sock_unlink;
d646960f
SO		 579
580 release_sock(sk);
ff353d86 581
d646960f
SO		 582 return 0;
583
a69f32af
SO		 584sock_unlink:
585 nfc_llcp_put_ssap(local, llcp_sock->ssap);
586
587 nfc_llcp_sock_unlink(&local->connecting_sockets, sk);
588
d646960f
SO		 589put_dev:
590 nfc_put_device(dev);
591
592error:
593 release_sock(sk);
594 return ret;
595}
596
53a0ac2e 597static int llcp_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
427a2eb1 598 struct msghdr *msg, size_t len)
53a0ac2e
SO		 599{
600 struct sock *sk = sock->sk;
601 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
602 int ret;
603
604 pr_debug("sock %p sk %p", sock, sk);
605
606 ret = sock_error(sk);
607 if (ret)
608 return ret;
609
610 if (msg->msg_flags & MSG_OOB)
611 return -EOPNOTSUPP;
612
613 lock_sock(sk);
614
615 if (sk->sk_state != LLCP_CONNECTED) {
616 release_sock(sk);
617 return -ENOTCONN;
618 }
619
620 release_sock(sk);
621
622 return nfc_llcp_send_i_frame(llcp_sock, msg, len);
623}
624
d646960f
SO		 625static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
626 struct msghdr *msg, size_t len, int flags)
627{
628 int noblock = flags & MSG_DONTWAIT;
629 struct sock *sk = sock->sk;
630 unsigned int copied, rlen;
631 struct sk_buff *skb, *cskb;
632 int err = 0;
633
634 pr_debug("%p %zu\n", sk, len);
635
636 lock_sock(sk);
637
638 if (sk->sk_state == LLCP_CLOSED &&
427a2eb1 639 skb_queue_empty(&sk->sk_receive_queue)) {
d646960f
SO		 640 release_sock(sk);
641 return 0;
642 }
643
644 release_sock(sk);
645
646 if (flags & (MSG_OOB))
647 return -EOPNOTSUPP;
648
649 skb = skb_recv_datagram(sk, flags, noblock, &err);
650 if (!skb) {
651 pr_err("Recv datagram failed state %d %d %d",
427a2eb1 652 sk->sk_state, err, sock_error(sk));
d646960f
SO		 653
654 if (sk->sk_shutdown & RCV_SHUTDOWN)
655 return 0;
656
657 return err;
658 }
659
427a2eb1 660 rlen = skb->len; /* real length of skb */
d646960f
SO		 661 copied = min_t(unsigned int, rlen, len);
662
663 cskb = skb;
664 if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) {
665 if (!(flags & MSG_PEEK))
666 skb_queue_head(&sk->sk_receive_queue, skb);
667 return -EFAULT;
668 }
669
670 /* Mark read part of skb as used */
671 if (!(flags & MSG_PEEK)) {
672
673 /* SOCK_STREAM: re-queue skb if it contains unreceived data */
4463523b 674 if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_RAW) {
d646960f
SO		 675 skb_pull(skb, copied);
676 if (skb->len) {
677 skb_queue_head(&sk->sk_receive_queue, skb);
678 goto done;
679 }
680 }
681
682 kfree_skb(skb);
683 }
684
685 /* XXX Queue backlogged skbs */
686
687done:
688 /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */
689 if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC))
690 copied = rlen;
691
692 return copied;
693}
694
695static const struct proto_ops llcp_sock_ops = {
696 .family = PF_NFC,
697 .owner = THIS_MODULE,
698 .bind = llcp_sock_bind,
699 .connect = llcp_sock_connect,
700 .release = llcp_sock_release,
701 .socketpair = sock_no_socketpair,
702 .accept = llcp_sock_accept,
703 .getname = llcp_sock_getname,
704 .poll = llcp_sock_poll,
705 .ioctl = sock_no_ioctl,
706 .listen = llcp_sock_listen,
707 .shutdown = sock_no_shutdown,
708 .setsockopt = sock_no_setsockopt,
709 .getsockopt = sock_no_getsockopt,
53a0ac2e 710 .sendmsg = llcp_sock_sendmsg,
d646960f
SO		 711 .recvmsg = llcp_sock_recvmsg,
712 .mmap = sock_no_mmap,
713};
714
4463523b
TE		 715static const struct proto_ops llcp_rawsock_ops = {
716 .family = PF_NFC,
717 .owner = THIS_MODULE,
718 .bind = llcp_raw_sock_bind,
719 .connect = sock_no_connect,
720 .release = llcp_sock_release,
721 .socketpair = sock_no_socketpair,
722 .accept = sock_no_accept,
723 .getname = llcp_sock_getname,
724 .poll = llcp_sock_poll,
725 .ioctl = sock_no_ioctl,
726 .listen = sock_no_listen,
727 .shutdown = sock_no_shutdown,
728 .setsockopt = sock_no_setsockopt,
729 .getsockopt = sock_no_getsockopt,
730 .sendmsg = sock_no_sendmsg,
731 .recvmsg = llcp_sock_recvmsg,
732 .mmap = sock_no_mmap,
733};
734
d646960f
SO		 735static void llcp_sock_destruct(struct sock *sk)
736{
737 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
738
739 pr_debug("%p\n", sk);
740
741 if (sk->sk_state == LLCP_CONNECTED)
742 nfc_put_device(llcp_sock->dev);
743
744 skb_queue_purge(&sk->sk_receive_queue);
745
746 nfc_llcp_sock_free(llcp_sock);
747
748 if (!sock_flag(sk, SOCK_DEAD)) {
749 pr_err("Freeing alive NFC LLCP socket %p\n", sk);
750 return;
751 }
752}
753
754struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp)
755{
756 struct sock *sk;
757 struct nfc_llcp_sock *llcp_sock;
758
759 sk = sk_alloc(&init_net, PF_NFC, gfp, &llcp_sock_proto);
760 if (!sk)
761 return NULL;
762
763 llcp_sock = nfc_llcp_sock(sk);
764
765 sock_init_data(sock, sk);
766 sk->sk_state = LLCP_CLOSED;
767 sk->sk_protocol = NFC_SOCKPROTO_LLCP;
768 sk->sk_type = type;
769 sk->sk_destruct = llcp_sock_destruct;
770
771 llcp_sock->ssap = 0;
772 llcp_sock->dsap = LLCP_SAP_SDP;
7a06e586 773 llcp_sock->rw = LLCP_DEFAULT_RW;
93d7e490 774 llcp_sock->miu = LLCP_DEFAULT_MIU;
d646960f
SO		 775 llcp_sock->send_n = llcp_sock->send_ack_n = 0;
776 llcp_sock->recv_n = llcp_sock->recv_ack_n = 0;
777 llcp_sock->remote_ready = 1;
cbbf4721 778 llcp_sock->reserved_ssap = LLCP_SAP_MAX;
d646960f
SO		 779 skb_queue_head_init(&llcp_sock->tx_queue);
780 skb_queue_head_init(&llcp_sock->tx_pending_queue);
781 skb_queue_head_init(&llcp_sock->tx_backlog_queue);
d646960f
SO		 782 INIT_LIST_HEAD(&llcp_sock->accept_queue);
783
784 if (sock != NULL)
785 sock->state = SS_UNCONNECTED;
786
787 return sk;
788}
789
790void nfc_llcp_sock_free(struct nfc_llcp_sock *sock)
791{
792 kfree(sock->service_name);
793
794 skb_queue_purge(&sock->tx_queue);
795 skb_queue_purge(&sock->tx_pending_queue);
796 skb_queue_purge(&sock->tx_backlog_queue);
797
798 list_del_init(&sock->accept_queue);
40c75f81 799
d646960f 800 sock->parent = NULL;
c7aa1225
SO		 801
802 nfc_llcp_local_put(sock->local);
d646960f
SO		 803}
804
805static int llcp_sock_create(struct net *net, struct socket *sock,
427a2eb1 806 const struct nfc_protocol *nfc_proto)
d646960f
SO		 807{
808 struct sock *sk;
809
810 pr_debug("%p\n", sock);
811
4463523b
TE		 812 if (sock->type != SOCK_STREAM &&
813 sock->type != SOCK_DGRAM &&
814 sock->type != SOCK_RAW)
d646960f
SO		 815 return -ESOCKTNOSUPPORT;
816
4463523b
TE		 817 if (sock->type == SOCK_RAW)
818 sock->ops = &llcp_rawsock_ops;
819 else
820 sock->ops = &llcp_sock_ops;
d646960f
SO		 821
822 sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC);
823 if (sk == NULL)
824 return -ENOMEM;
825
826 return 0;
827}
828
829static const struct nfc_protocol llcp_nfc_proto = {
830 .id = NFC_SOCKPROTO_LLCP,
831 .proto = &llcp_sock_proto,
832 .owner = THIS_MODULE,
833 .create = llcp_sock_create
834};
835
836int __init nfc_llcp_sock_init(void)
837{
838 return nfc_proto_register(&llcp_nfc_proto);
839}
840
841void nfc_llcp_sock_exit(void)
842{
843 nfc_proto_unregister(&llcp_nfc_proto);
844}
Linux kernel - Deliverables
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