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1/*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 *
4 * Authors:
5 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
6 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the
20 * Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
25
26#include <net/tcp_states.h>
27#include <linux/nfc.h>
28#include <linux/export.h>
29
30#include "nfc.h"
31
32static void rawsock_write_queue_purge(struct sock *sk)
33{
34 pr_debug("sk=%p\n", sk);
35
36 spin_lock_bh(&sk->sk_write_queue.lock);
37 __skb_queue_purge(&sk->sk_write_queue);
38 nfc_rawsock(sk)->tx_work_scheduled = false;
39 spin_unlock_bh(&sk->sk_write_queue.lock);
40}
41
42static void rawsock_report_error(struct sock *sk, int err)
43{
44 pr_debug("sk=%p err=%d\n", sk, err);
45
46 sk->sk_shutdown = SHUTDOWN_MASK;
47 sk->sk_err = -err;
48 sk->sk_error_report(sk);
49
50 rawsock_write_queue_purge(sk);
51}
52
53static int rawsock_release(struct socket *sock)
54{
55 struct sock *sk = sock->sk;
56
57 pr_debug("sock=%p sk=%p\n", sock, sk);
58
59 if (!sk)
60 return 0;
61
62 sock_orphan(sk);
63 sock_put(sk);
64
65 return 0;
66}
67
68static int rawsock_connect(struct socket *sock, struct sockaddr *_addr,
69 int len, int flags)
70{
71 struct sock *sk = sock->sk;
72 struct sockaddr_nfc *addr = (struct sockaddr_nfc *)_addr;
73 struct nfc_dev *dev;
74 int rc = 0;
75
76 pr_debug("sock=%p sk=%p flags=%d\n", sock, sk, flags);
77
78 if (!addr || len < sizeof(struct sockaddr_nfc) ||
79 addr->sa_family != AF_NFC)
80 return -EINVAL;
81
82 pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n",
83 addr->dev_idx, addr->target_idx, addr->nfc_protocol);
84
85 lock_sock(sk);
86
87 if (sock->state == SS_CONNECTED) {
88 rc = -EISCONN;
89 goto error;
90 }
91
92 dev = nfc_get_device(addr->dev_idx);
93 if (!dev) {
94 rc = -ENODEV;
95 goto error;
96 }
97
98 if (addr->target_idx > dev->target_next_idx - 1 ||
99 addr->target_idx < dev->target_next_idx - dev->n_targets) {
100 rc = -EINVAL;
101 goto error;
102 }
103
104 rc = nfc_activate_target(dev, addr->target_idx, addr->nfc_protocol);
105 if (rc)
106 goto put_dev;
107
108 nfc_rawsock(sk)->dev = dev;
109 nfc_rawsock(sk)->target_idx = addr->target_idx;
110 sock->state = SS_CONNECTED;
111 sk->sk_state = TCP_ESTABLISHED;
112 sk->sk_state_change(sk);
113
114 release_sock(sk);
115 return 0;
116
117put_dev:
118 nfc_put_device(dev);
119error:
120 release_sock(sk);
121 return rc;
122}
123
124static int rawsock_add_header(struct sk_buff *skb)
125{
126 *skb_push(skb, NFC_HEADER_SIZE) = 0;
127
128 return 0;
129}
130
131static void rawsock_data_exchange_complete(void *context, struct sk_buff *skb,
132 int err)
133{
134 struct sock *sk = (struct sock *) context;
135
136 BUG_ON(in_irq());
137
138 pr_debug("sk=%p err=%d\n", sk, err);
139
140 if (err)
141 goto error;
142
143 err = rawsock_add_header(skb);
144 if (err)
145 goto error;
146
147 err = sock_queue_rcv_skb(sk, skb);
148 if (err)
149 goto error;
150
151 spin_lock_bh(&sk->sk_write_queue.lock);
152 if (!skb_queue_empty(&sk->sk_write_queue))
153 schedule_work(&nfc_rawsock(sk)->tx_work);
154 else
155 nfc_rawsock(sk)->tx_work_scheduled = false;
156 spin_unlock_bh(&sk->sk_write_queue.lock);
157
158 sock_put(sk);
159 return;
160
161error:
162 rawsock_report_error(sk, err);
163 sock_put(sk);
164}
165
166static void rawsock_tx_work(struct work_struct *work)
167{
168 struct sock *sk = to_rawsock_sk(work);
169 struct nfc_dev *dev = nfc_rawsock(sk)->dev;
170 u32 target_idx = nfc_rawsock(sk)->target_idx;
171 struct sk_buff *skb;
172 int rc;
173
174 pr_debug("sk=%p target_idx=%u\n", sk, target_idx);
175
176 if (sk->sk_shutdown & SEND_SHUTDOWN) {
177 rawsock_write_queue_purge(sk);
178 return;
179 }
180
181 skb = skb_dequeue(&sk->sk_write_queue);
182
183 sock_hold(sk);
184 rc = nfc_data_exchange(dev, target_idx, skb,
185 rawsock_data_exchange_complete, sk);
186 if (rc) {
187 rawsock_report_error(sk, rc);
188 sock_put(sk);
189 }
190}
191
192static int rawsock_sendmsg(struct kiocb *iocb, struct socket *sock,
193 struct msghdr *msg, size_t len)
194{
195 struct sock *sk = sock->sk;
196 struct nfc_dev *dev = nfc_rawsock(sk)->dev;
197 struct sk_buff *skb;
198 int rc;
199
200 pr_debug("sock=%p sk=%p len=%zu\n", sock, sk, len);
201
202 if (msg->msg_namelen)
203 return -EOPNOTSUPP;
204
205 if (sock->state != SS_CONNECTED)
206 return -ENOTCONN;
207
208 skb = nfc_alloc_send_skb(dev, sk, msg->msg_flags, len, &rc);
209 if (skb == NULL)
210 return rc;
211
212 rc = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
213 if (rc < 0) {
214 kfree_skb(skb);
215 return rc;
216 }
217
218 spin_lock_bh(&sk->sk_write_queue.lock);
219 __skb_queue_tail(&sk->sk_write_queue, skb);
220 if (!nfc_rawsock(sk)->tx_work_scheduled) {
221 schedule_work(&nfc_rawsock(sk)->tx_work);
222 nfc_rawsock(sk)->tx_work_scheduled = true;
223 }
224 spin_unlock_bh(&sk->sk_write_queue.lock);
225
226 return len;
227}
228
229static int rawsock_recvmsg(struct kiocb *iocb, struct socket *sock,
230 struct msghdr *msg, size_t len, int flags)
231{
232 int noblock = flags & MSG_DONTWAIT;
233 struct sock *sk = sock->sk;
234 struct sk_buff *skb;
235 int copied;
236 int rc;
237
238 pr_debug("sock=%p sk=%p len=%zu flags=%d\n", sock, sk, len, flags);
239
240 skb = skb_recv_datagram(sk, flags, noblock, &rc);
241 if (!skb)
242 return rc;
243
244 msg->msg_namelen = 0;
245
246 copied = skb->len;
247 if (len < copied) {
248 msg->msg_flags |= MSG_TRUNC;
249 copied = len;
250 }
251
252 rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
253
254 skb_free_datagram(sk, skb);
255
256 return rc ? : copied;
257}
258
259
260static const struct proto_ops rawsock_ops = {
261 .family = PF_NFC,
262 .owner = THIS_MODULE,
263 .release = rawsock_release,
264 .bind = sock_no_bind,
265 .connect = rawsock_connect,
266 .socketpair = sock_no_socketpair,
267 .accept = sock_no_accept,
268 .getname = sock_no_getname,
269 .poll = datagram_poll,
270 .ioctl = sock_no_ioctl,
271 .listen = sock_no_listen,
272 .shutdown = sock_no_shutdown,
273 .setsockopt = sock_no_setsockopt,
274 .getsockopt = sock_no_getsockopt,
275 .sendmsg = rawsock_sendmsg,
276 .recvmsg = rawsock_recvmsg,
277 .mmap = sock_no_mmap,
278};
279
280static void rawsock_destruct(struct sock *sk)
281{
282 pr_debug("sk=%p\n", sk);
283
284 if (sk->sk_state == TCP_ESTABLISHED) {
285 nfc_deactivate_target(nfc_rawsock(sk)->dev,
286 nfc_rawsock(sk)->target_idx);
287 nfc_put_device(nfc_rawsock(sk)->dev);
288 }
289
290 skb_queue_purge(&sk->sk_receive_queue);
291
292 if (!sock_flag(sk, SOCK_DEAD)) {
293 pr_err("Freeing alive NFC raw socket %p\n", sk);
294 return;
295 }
296}
297
298static int rawsock_create(struct net *net, struct socket *sock,
299 const struct nfc_protocol *nfc_proto)
300{
301 struct sock *sk;
302
303 pr_debug("sock=%p\n", sock);
304
305 if (sock->type != SOCK_SEQPACKET)
306 return -ESOCKTNOSUPPORT;
307
308 sock->ops = &rawsock_ops;
309
310 sk = sk_alloc(net, PF_NFC, GFP_ATOMIC, nfc_proto->proto);
311 if (!sk)
312 return -ENOMEM;
313
314 sock_init_data(sock, sk);
315 sk->sk_protocol = nfc_proto->id;
316 sk->sk_destruct = rawsock_destruct;
317 sock->state = SS_UNCONNECTED;
318
319 INIT_WORK(&nfc_rawsock(sk)->tx_work, rawsock_tx_work);
320 nfc_rawsock(sk)->tx_work_scheduled = false;
321
322 return 0;
323}
324
325static struct proto rawsock_proto = {
326 .name = "NFC_RAW",
327 .owner = THIS_MODULE,
328 .obj_size = sizeof(struct nfc_rawsock),
329};
330
331static const struct nfc_protocol rawsock_nfc_proto = {
332 .id = NFC_SOCKPROTO_RAW,
333 .proto = &rawsock_proto,
334 .owner = THIS_MODULE,
335 .create = rawsock_create
336};
337
338int __init rawsock_init(void)
339{
340 int rc;
341
342 rc = nfc_proto_register(&rawsock_nfc_proto);
343
344 return rc;
345}
346
347void rawsock_exit(void)
348{
349 nfc_proto_unregister(&rawsock_nfc_proto);
350}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2011 Instituto Nokia de Tecnologia
4 *
5 * Authors:
6 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
7 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
8 */
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
11
12#include <net/tcp_states.h>
13#include <linux/nfc.h>
14#include <linux/export.h>
15
16#include "nfc.h"
17
18static struct nfc_sock_list raw_sk_list = {
19 .lock = __RW_LOCK_UNLOCKED(raw_sk_list.lock)
20};
21
22static void nfc_sock_link(struct nfc_sock_list *l, struct sock *sk)
23{
24 write_lock(&l->lock);
25 sk_add_node(sk, &l->head);
26 write_unlock(&l->lock);
27}
28
29static void nfc_sock_unlink(struct nfc_sock_list *l, struct sock *sk)
30{
31 write_lock(&l->lock);
32 sk_del_node_init(sk);
33 write_unlock(&l->lock);
34}
35
36static void rawsock_write_queue_purge(struct sock *sk)
37{
38 pr_debug("sk=%p\n", sk);
39
40 spin_lock_bh(&sk->sk_write_queue.lock);
41 __skb_queue_purge(&sk->sk_write_queue);
42 nfc_rawsock(sk)->tx_work_scheduled = false;
43 spin_unlock_bh(&sk->sk_write_queue.lock);
44}
45
46static void rawsock_report_error(struct sock *sk, int err)
47{
48 pr_debug("sk=%p err=%d\n", sk, err);
49
50 sk->sk_shutdown = SHUTDOWN_MASK;
51 sk->sk_err = -err;
52 sk_error_report(sk);
53
54 rawsock_write_queue_purge(sk);
55}
56
57static int rawsock_release(struct socket *sock)
58{
59 struct sock *sk = sock->sk;
60
61 pr_debug("sock=%p sk=%p\n", sock, sk);
62
63 if (!sk)
64 return 0;
65
66 if (sock->type == SOCK_RAW)
67 nfc_sock_unlink(&raw_sk_list, sk);
68
69 sock_orphan(sk);
70 sock_put(sk);
71
72 return 0;
73}
74
75static int rawsock_connect(struct socket *sock, struct sockaddr *_addr,
76 int len, int flags)
77{
78 struct sock *sk = sock->sk;
79 struct sockaddr_nfc *addr = (struct sockaddr_nfc *)_addr;
80 struct nfc_dev *dev;
81 int rc = 0;
82
83 pr_debug("sock=%p sk=%p flags=%d\n", sock, sk, flags);
84
85 if (!addr || len < sizeof(struct sockaddr_nfc) ||
86 addr->sa_family != AF_NFC)
87 return -EINVAL;
88
89 pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n",
90 addr->dev_idx, addr->target_idx, addr->nfc_protocol);
91
92 lock_sock(sk);
93
94 if (sock->state == SS_CONNECTED) {
95 rc = -EISCONN;
96 goto error;
97 }
98
99 dev = nfc_get_device(addr->dev_idx);
100 if (!dev) {
101 rc = -ENODEV;
102 goto error;
103 }
104
105 if (addr->target_idx > dev->target_next_idx - 1 ||
106 addr->target_idx < dev->target_next_idx - dev->n_targets) {
107 rc = -EINVAL;
108 goto put_dev;
109 }
110
111 rc = nfc_activate_target(dev, addr->target_idx, addr->nfc_protocol);
112 if (rc)
113 goto put_dev;
114
115 nfc_rawsock(sk)->dev = dev;
116 nfc_rawsock(sk)->target_idx = addr->target_idx;
117 sock->state = SS_CONNECTED;
118 sk->sk_state = TCP_ESTABLISHED;
119 sk->sk_state_change(sk);
120
121 release_sock(sk);
122 return 0;
123
124put_dev:
125 nfc_put_device(dev);
126error:
127 release_sock(sk);
128 return rc;
129}
130
131static int rawsock_add_header(struct sk_buff *skb)
132{
133 *(u8 *)skb_push(skb, NFC_HEADER_SIZE) = 0;
134
135 return 0;
136}
137
138static void rawsock_data_exchange_complete(void *context, struct sk_buff *skb,
139 int err)
140{
141 struct sock *sk = (struct sock *) context;
142
143 BUG_ON(in_irq());
144
145 pr_debug("sk=%p err=%d\n", sk, err);
146
147 if (err)
148 goto error;
149
150 err = rawsock_add_header(skb);
151 if (err)
152 goto error_skb;
153
154 err = sock_queue_rcv_skb(sk, skb);
155 if (err)
156 goto error_skb;
157
158 spin_lock_bh(&sk->sk_write_queue.lock);
159 if (!skb_queue_empty(&sk->sk_write_queue))
160 schedule_work(&nfc_rawsock(sk)->tx_work);
161 else
162 nfc_rawsock(sk)->tx_work_scheduled = false;
163 spin_unlock_bh(&sk->sk_write_queue.lock);
164
165 sock_put(sk);
166 return;
167
168error_skb:
169 kfree_skb(skb);
170
171error:
172 rawsock_report_error(sk, err);
173 sock_put(sk);
174}
175
176static void rawsock_tx_work(struct work_struct *work)
177{
178 struct sock *sk = to_rawsock_sk(work);
179 struct nfc_dev *dev = nfc_rawsock(sk)->dev;
180 u32 target_idx = nfc_rawsock(sk)->target_idx;
181 struct sk_buff *skb;
182 int rc;
183
184 pr_debug("sk=%p target_idx=%u\n", sk, target_idx);
185
186 if (sk->sk_shutdown & SEND_SHUTDOWN) {
187 rawsock_write_queue_purge(sk);
188 return;
189 }
190
191 skb = skb_dequeue(&sk->sk_write_queue);
192
193 sock_hold(sk);
194 rc = nfc_data_exchange(dev, target_idx, skb,
195 rawsock_data_exchange_complete, sk);
196 if (rc) {
197 rawsock_report_error(sk, rc);
198 sock_put(sk);
199 }
200}
201
202static int rawsock_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
203{
204 struct sock *sk = sock->sk;
205 struct nfc_dev *dev = nfc_rawsock(sk)->dev;
206 struct sk_buff *skb;
207 int rc;
208
209 pr_debug("sock=%p sk=%p len=%zu\n", sock, sk, len);
210
211 if (msg->msg_namelen)
212 return -EOPNOTSUPP;
213
214 if (sock->state != SS_CONNECTED)
215 return -ENOTCONN;
216
217 skb = nfc_alloc_send_skb(dev, sk, msg->msg_flags, len, &rc);
218 if (skb == NULL)
219 return rc;
220
221 rc = memcpy_from_msg(skb_put(skb, len), msg, len);
222 if (rc < 0) {
223 kfree_skb(skb);
224 return rc;
225 }
226
227 spin_lock_bh(&sk->sk_write_queue.lock);
228 __skb_queue_tail(&sk->sk_write_queue, skb);
229 if (!nfc_rawsock(sk)->tx_work_scheduled) {
230 schedule_work(&nfc_rawsock(sk)->tx_work);
231 nfc_rawsock(sk)->tx_work_scheduled = true;
232 }
233 spin_unlock_bh(&sk->sk_write_queue.lock);
234
235 return len;
236}
237
238static int rawsock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
239 int flags)
240{
241 int noblock = flags & MSG_DONTWAIT;
242 struct sock *sk = sock->sk;
243 struct sk_buff *skb;
244 int copied;
245 int rc;
246
247 pr_debug("sock=%p sk=%p len=%zu flags=%d\n", sock, sk, len, flags);
248
249 skb = skb_recv_datagram(sk, flags, noblock, &rc);
250 if (!skb)
251 return rc;
252
253 copied = skb->len;
254 if (len < copied) {
255 msg->msg_flags |= MSG_TRUNC;
256 copied = len;
257 }
258
259 rc = skb_copy_datagram_msg(skb, 0, msg, copied);
260
261 skb_free_datagram(sk, skb);
262
263 return rc ? : copied;
264}
265
266static const struct proto_ops rawsock_ops = {
267 .family = PF_NFC,
268 .owner = THIS_MODULE,
269 .release = rawsock_release,
270 .bind = sock_no_bind,
271 .connect = rawsock_connect,
272 .socketpair = sock_no_socketpair,
273 .accept = sock_no_accept,
274 .getname = sock_no_getname,
275 .poll = datagram_poll,
276 .ioctl = sock_no_ioctl,
277 .listen = sock_no_listen,
278 .shutdown = sock_no_shutdown,
279 .sendmsg = rawsock_sendmsg,
280 .recvmsg = rawsock_recvmsg,
281 .mmap = sock_no_mmap,
282};
283
284static const struct proto_ops rawsock_raw_ops = {
285 .family = PF_NFC,
286 .owner = THIS_MODULE,
287 .release = rawsock_release,
288 .bind = sock_no_bind,
289 .connect = sock_no_connect,
290 .socketpair = sock_no_socketpair,
291 .accept = sock_no_accept,
292 .getname = sock_no_getname,
293 .poll = datagram_poll,
294 .ioctl = sock_no_ioctl,
295 .listen = sock_no_listen,
296 .shutdown = sock_no_shutdown,
297 .sendmsg = sock_no_sendmsg,
298 .recvmsg = rawsock_recvmsg,
299 .mmap = sock_no_mmap,
300};
301
302static void rawsock_destruct(struct sock *sk)
303{
304 pr_debug("sk=%p\n", sk);
305
306 if (sk->sk_state == TCP_ESTABLISHED) {
307 nfc_deactivate_target(nfc_rawsock(sk)->dev,
308 nfc_rawsock(sk)->target_idx,
309 NFC_TARGET_MODE_IDLE);
310 nfc_put_device(nfc_rawsock(sk)->dev);
311 }
312
313 skb_queue_purge(&sk->sk_receive_queue);
314
315 if (!sock_flag(sk, SOCK_DEAD)) {
316 pr_err("Freeing alive NFC raw socket %p\n", sk);
317 return;
318 }
319}
320
321static int rawsock_create(struct net *net, struct socket *sock,
322 const struct nfc_protocol *nfc_proto, int kern)
323{
324 struct sock *sk;
325
326 pr_debug("sock=%p\n", sock);
327
328 if ((sock->type != SOCK_SEQPACKET) && (sock->type != SOCK_RAW))
329 return -ESOCKTNOSUPPORT;
330
331 if (sock->type == SOCK_RAW) {
332 if (!ns_capable(net->user_ns, CAP_NET_RAW))
333 return -EPERM;
334 sock->ops = &rawsock_raw_ops;
335 } else {
336 sock->ops = &rawsock_ops;
337 }
338
339 sk = sk_alloc(net, PF_NFC, GFP_ATOMIC, nfc_proto->proto, kern);
340 if (!sk)
341 return -ENOMEM;
342
343 sock_init_data(sock, sk);
344 sk->sk_protocol = nfc_proto->id;
345 sk->sk_destruct = rawsock_destruct;
346 sock->state = SS_UNCONNECTED;
347 if (sock->type == SOCK_RAW)
348 nfc_sock_link(&raw_sk_list, sk);
349 else {
350 INIT_WORK(&nfc_rawsock(sk)->tx_work, rawsock_tx_work);
351 nfc_rawsock(sk)->tx_work_scheduled = false;
352 }
353
354 return 0;
355}
356
357void nfc_send_to_raw_sock(struct nfc_dev *dev, struct sk_buff *skb,
358 u8 payload_type, u8 direction)
359{
360 struct sk_buff *skb_copy = NULL, *nskb;
361 struct sock *sk;
362 u8 *data;
363
364 read_lock(&raw_sk_list.lock);
365
366 sk_for_each(sk, &raw_sk_list.head) {
367 if (!skb_copy) {
368 skb_copy = __pskb_copy_fclone(skb, NFC_RAW_HEADER_SIZE,
369 GFP_ATOMIC, true);
370 if (!skb_copy)
371 continue;
372
373 data = skb_push(skb_copy, NFC_RAW_HEADER_SIZE);
374
375 data[0] = dev ? dev->idx : 0xFF;
376 data[1] = direction & 0x01;
377 data[1] |= (payload_type << 1);
378 }
379
380 nskb = skb_clone(skb_copy, GFP_ATOMIC);
381 if (!nskb)
382 continue;
383
384 if (sock_queue_rcv_skb(sk, nskb))
385 kfree_skb(nskb);
386 }
387
388 read_unlock(&raw_sk_list.lock);
389
390 kfree_skb(skb_copy);
391}
392EXPORT_SYMBOL(nfc_send_to_raw_sock);
393
394static struct proto rawsock_proto = {
395 .name = "NFC_RAW",
396 .owner = THIS_MODULE,
397 .obj_size = sizeof(struct nfc_rawsock),
398};
399
400static const struct nfc_protocol rawsock_nfc_proto = {
401 .id = NFC_SOCKPROTO_RAW,
402 .proto = &rawsock_proto,
403 .owner = THIS_MODULE,
404 .create = rawsock_create
405};
406
407int __init rawsock_init(void)
408{
409 int rc;
410
411 rc = nfc_proto_register(&rawsock_nfc_proto);
412
413 return rc;
414}
415
416void rawsock_exit(void)
417{
418 nfc_proto_unregister(&rawsock_nfc_proto);
419}