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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, see <http://www.gnu.org/licenses/>.
20 */
21
22#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
23
24#include <net/tcp_states.h>
25#include <linux/nfc.h>
26#include <linux/export.h>
27
28#include "nfc.h"
29
30static struct nfc_sock_list raw_sk_list = {
31 .lock = __RW_LOCK_UNLOCKED(raw_sk_list.lock)
32};
33
34static void nfc_sock_link(struct nfc_sock_list *l, struct sock *sk)
35{
36 write_lock(&l->lock);
37 sk_add_node(sk, &l->head);
38 write_unlock(&l->lock);
39}
40
41static void nfc_sock_unlink(struct nfc_sock_list *l, struct sock *sk)
42{
43 write_lock(&l->lock);
44 sk_del_node_init(sk);
45 write_unlock(&l->lock);
46}
47
48static void rawsock_write_queue_purge(struct sock *sk)
49{
50 pr_debug("sk=%p\n", sk);
51
52 spin_lock_bh(&sk->sk_write_queue.lock);
53 __skb_queue_purge(&sk->sk_write_queue);
54 nfc_rawsock(sk)->tx_work_scheduled = false;
55 spin_unlock_bh(&sk->sk_write_queue.lock);
56}
57
58static void rawsock_report_error(struct sock *sk, int err)
59{
60 pr_debug("sk=%p err=%d\n", sk, err);
61
62 sk->sk_shutdown = SHUTDOWN_MASK;
63 sk->sk_err = -err;
64 sk->sk_error_report(sk);
65
66 rawsock_write_queue_purge(sk);
67}
68
69static int rawsock_release(struct socket *sock)
70{
71 struct sock *sk = sock->sk;
72
73 pr_debug("sock=%p sk=%p\n", sock, sk);
74
75 if (!sk)
76 return 0;
77
78 if (sock->type == SOCK_RAW)
79 nfc_sock_unlink(&raw_sk_list, sk);
80
81 sock_orphan(sk);
82 sock_put(sk);
83
84 return 0;
85}
86
87static int rawsock_connect(struct socket *sock, struct sockaddr *_addr,
88 int len, int flags)
89{
90 struct sock *sk = sock->sk;
91 struct sockaddr_nfc *addr = (struct sockaddr_nfc *)_addr;
92 struct nfc_dev *dev;
93 int rc = 0;
94
95 pr_debug("sock=%p sk=%p flags=%d\n", sock, sk, flags);
96
97 if (!addr || len < sizeof(struct sockaddr_nfc) ||
98 addr->sa_family != AF_NFC)
99 return -EINVAL;
100
101 pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n",
102 addr->dev_idx, addr->target_idx, addr->nfc_protocol);
103
104 lock_sock(sk);
105
106 if (sock->state == SS_CONNECTED) {
107 rc = -EISCONN;
108 goto error;
109 }
110
111 dev = nfc_get_device(addr->dev_idx);
112 if (!dev) {
113 rc = -ENODEV;
114 goto error;
115 }
116
117 if (addr->target_idx > dev->target_next_idx - 1 ||
118 addr->target_idx < dev->target_next_idx - dev->n_targets) {
119 rc = -EINVAL;
120 goto error;
121 }
122
123 rc = nfc_activate_target(dev, addr->target_idx, addr->nfc_protocol);
124 if (rc)
125 goto put_dev;
126
127 nfc_rawsock(sk)->dev = dev;
128 nfc_rawsock(sk)->target_idx = addr->target_idx;
129 sock->state = SS_CONNECTED;
130 sk->sk_state = TCP_ESTABLISHED;
131 sk->sk_state_change(sk);
132
133 release_sock(sk);
134 return 0;
135
136put_dev:
137 nfc_put_device(dev);
138error:
139 release_sock(sk);
140 return rc;
141}
142
143static int rawsock_add_header(struct sk_buff *skb)
144{
145 *skb_push(skb, NFC_HEADER_SIZE) = 0;
146
147 return 0;
148}
149
150static void rawsock_data_exchange_complete(void *context, struct sk_buff *skb,
151 int err)
152{
153 struct sock *sk = (struct sock *) context;
154
155 BUG_ON(in_irq());
156
157 pr_debug("sk=%p err=%d\n", sk, err);
158
159 if (err)
160 goto error;
161
162 err = rawsock_add_header(skb);
163 if (err)
164 goto error_skb;
165
166 err = sock_queue_rcv_skb(sk, skb);
167 if (err)
168 goto error_skb;
169
170 spin_lock_bh(&sk->sk_write_queue.lock);
171 if (!skb_queue_empty(&sk->sk_write_queue))
172 schedule_work(&nfc_rawsock(sk)->tx_work);
173 else
174 nfc_rawsock(sk)->tx_work_scheduled = false;
175 spin_unlock_bh(&sk->sk_write_queue.lock);
176
177 sock_put(sk);
178 return;
179
180error_skb:
181 kfree_skb(skb);
182
183error:
184 rawsock_report_error(sk, err);
185 sock_put(sk);
186}
187
188static void rawsock_tx_work(struct work_struct *work)
189{
190 struct sock *sk = to_rawsock_sk(work);
191 struct nfc_dev *dev = nfc_rawsock(sk)->dev;
192 u32 target_idx = nfc_rawsock(sk)->target_idx;
193 struct sk_buff *skb;
194 int rc;
195
196 pr_debug("sk=%p target_idx=%u\n", sk, target_idx);
197
198 if (sk->sk_shutdown & SEND_SHUTDOWN) {
199 rawsock_write_queue_purge(sk);
200 return;
201 }
202
203 skb = skb_dequeue(&sk->sk_write_queue);
204
205 sock_hold(sk);
206 rc = nfc_data_exchange(dev, target_idx, skb,
207 rawsock_data_exchange_complete, sk);
208 if (rc) {
209 rawsock_report_error(sk, rc);
210 sock_put(sk);
211 }
212}
213
214static int rawsock_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
215{
216 struct sock *sk = sock->sk;
217 struct nfc_dev *dev = nfc_rawsock(sk)->dev;
218 struct sk_buff *skb;
219 int rc;
220
221 pr_debug("sock=%p sk=%p len=%zu\n", sock, sk, len);
222
223 if (msg->msg_namelen)
224 return -EOPNOTSUPP;
225
226 if (sock->state != SS_CONNECTED)
227 return -ENOTCONN;
228
229 skb = nfc_alloc_send_skb(dev, sk, msg->msg_flags, len, &rc);
230 if (skb == NULL)
231 return rc;
232
233 rc = memcpy_from_msg(skb_put(skb, len), msg, len);
234 if (rc < 0) {
235 kfree_skb(skb);
236 return rc;
237 }
238
239 spin_lock_bh(&sk->sk_write_queue.lock);
240 __skb_queue_tail(&sk->sk_write_queue, skb);
241 if (!nfc_rawsock(sk)->tx_work_scheduled) {
242 schedule_work(&nfc_rawsock(sk)->tx_work);
243 nfc_rawsock(sk)->tx_work_scheduled = true;
244 }
245 spin_unlock_bh(&sk->sk_write_queue.lock);
246
247 return len;
248}
249
250static int rawsock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
251 int flags)
252{
253 int noblock = flags & MSG_DONTWAIT;
254 struct sock *sk = sock->sk;
255 struct sk_buff *skb;
256 int copied;
257 int rc;
258
259 pr_debug("sock=%p sk=%p len=%zu flags=%d\n", sock, sk, len, flags);
260
261 skb = skb_recv_datagram(sk, flags, noblock, &rc);
262 if (!skb)
263 return rc;
264
265 copied = skb->len;
266 if (len < copied) {
267 msg->msg_flags |= MSG_TRUNC;
268 copied = len;
269 }
270
271 rc = skb_copy_datagram_msg(skb, 0, msg, copied);
272
273 skb_free_datagram(sk, skb);
274
275 return rc ? : copied;
276}
277
278static const struct proto_ops rawsock_ops = {
279 .family = PF_NFC,
280 .owner = THIS_MODULE,
281 .release = rawsock_release,
282 .bind = sock_no_bind,
283 .connect = rawsock_connect,
284 .socketpair = sock_no_socketpair,
285 .accept = sock_no_accept,
286 .getname = sock_no_getname,
287 .poll = datagram_poll,
288 .ioctl = sock_no_ioctl,
289 .listen = sock_no_listen,
290 .shutdown = sock_no_shutdown,
291 .setsockopt = sock_no_setsockopt,
292 .getsockopt = sock_no_getsockopt,
293 .sendmsg = rawsock_sendmsg,
294 .recvmsg = rawsock_recvmsg,
295 .mmap = sock_no_mmap,
296};
297
298static const struct proto_ops rawsock_raw_ops = {
299 .family = PF_NFC,
300 .owner = THIS_MODULE,
301 .release = rawsock_release,
302 .bind = sock_no_bind,
303 .connect = sock_no_connect,
304 .socketpair = sock_no_socketpair,
305 .accept = sock_no_accept,
306 .getname = sock_no_getname,
307 .poll = datagram_poll,
308 .ioctl = sock_no_ioctl,
309 .listen = sock_no_listen,
310 .shutdown = sock_no_shutdown,
311 .setsockopt = sock_no_setsockopt,
312 .getsockopt = sock_no_getsockopt,
313 .sendmsg = sock_no_sendmsg,
314 .recvmsg = rawsock_recvmsg,
315 .mmap = sock_no_mmap,
316};
317
318static void rawsock_destruct(struct sock *sk)
319{
320 pr_debug("sk=%p\n", sk);
321
322 if (sk->sk_state == TCP_ESTABLISHED) {
323 nfc_deactivate_target(nfc_rawsock(sk)->dev,
324 nfc_rawsock(sk)->target_idx,
325 NFC_TARGET_MODE_IDLE);
326 nfc_put_device(nfc_rawsock(sk)->dev);
327 }
328
329 skb_queue_purge(&sk->sk_receive_queue);
330
331 if (!sock_flag(sk, SOCK_DEAD)) {
332 pr_err("Freeing alive NFC raw socket %p\n", sk);
333 return;
334 }
335}
336
337static int rawsock_create(struct net *net, struct socket *sock,
338 const struct nfc_protocol *nfc_proto, int kern)
339{
340 struct sock *sk;
341
342 pr_debug("sock=%p\n", sock);
343
344 if ((sock->type != SOCK_SEQPACKET) && (sock->type != SOCK_RAW))
345 return -ESOCKTNOSUPPORT;
346
347 if (sock->type == SOCK_RAW)
348 sock->ops = &rawsock_raw_ops;
349 else
350 sock->ops = &rawsock_ops;
351
352 sk = sk_alloc(net, PF_NFC, GFP_ATOMIC, nfc_proto->proto, kern);
353 if (!sk)
354 return -ENOMEM;
355
356 sock_init_data(sock, sk);
357 sk->sk_protocol = nfc_proto->id;
358 sk->sk_destruct = rawsock_destruct;
359 sock->state = SS_UNCONNECTED;
360 if (sock->type == SOCK_RAW)
361 nfc_sock_link(&raw_sk_list, sk);
362 else {
363 INIT_WORK(&nfc_rawsock(sk)->tx_work, rawsock_tx_work);
364 nfc_rawsock(sk)->tx_work_scheduled = false;
365 }
366
367 return 0;
368}
369
370void nfc_send_to_raw_sock(struct nfc_dev *dev, struct sk_buff *skb,
371 u8 payload_type, u8 direction)
372{
373 struct sk_buff *skb_copy = NULL, *nskb;
374 struct sock *sk;
375 u8 *data;
376
377 read_lock(&raw_sk_list.lock);
378
379 sk_for_each(sk, &raw_sk_list.head) {
380 if (!skb_copy) {
381 skb_copy = __pskb_copy_fclone(skb, NFC_RAW_HEADER_SIZE,
382 GFP_ATOMIC, true);
383 if (!skb_copy)
384 continue;
385
386 data = skb_push(skb_copy, NFC_RAW_HEADER_SIZE);
387
388 data[0] = dev ? dev->idx : 0xFF;
389 data[1] = direction & 0x01;
390 data[1] |= (payload_type << 1);
391 }
392
393 nskb = skb_clone(skb_copy, GFP_ATOMIC);
394 if (!nskb)
395 continue;
396
397 if (sock_queue_rcv_skb(sk, nskb))
398 kfree_skb(nskb);
399 }
400
401 read_unlock(&raw_sk_list.lock);
402
403 kfree_skb(skb_copy);
404}
405EXPORT_SYMBOL(nfc_send_to_raw_sock);
406
407static struct proto rawsock_proto = {
408 .name = "NFC_RAW",
409 .owner = THIS_MODULE,
410 .obj_size = sizeof(struct nfc_rawsock),
411};
412
413static const struct nfc_protocol rawsock_nfc_proto = {
414 .id = NFC_SOCKPROTO_RAW,
415 .proto = &rawsock_proto,
416 .owner = THIS_MODULE,
417 .create = rawsock_create
418};
419
420int __init rawsock_init(void)
421{
422 int rc;
423
424 rc = nfc_proto_register(&rawsock_nfc_proto);
425
426 return rc;
427}
428
429void rawsock_exit(void)
430{
431 nfc_proto_unregister(&rawsock_nfc_proto);
432}
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#include <linux/kcov.h>
16
17#include "nfc.h"
18
19static struct nfc_sock_list raw_sk_list = {
20 .lock = __RW_LOCK_UNLOCKED(raw_sk_list.lock)
21};
22
23static void nfc_sock_link(struct nfc_sock_list *l, struct sock *sk)
24{
25 write_lock(&l->lock);
26 sk_add_node(sk, &l->head);
27 write_unlock(&l->lock);
28}
29
30static void nfc_sock_unlink(struct nfc_sock_list *l, struct sock *sk)
31{
32 write_lock(&l->lock);
33 sk_del_node_init(sk);
34 write_unlock(&l->lock);
35}
36
37static void rawsock_write_queue_purge(struct sock *sk)
38{
39 pr_debug("sk=%p\n", sk);
40
41 spin_lock_bh(&sk->sk_write_queue.lock);
42 __skb_queue_purge(&sk->sk_write_queue);
43 nfc_rawsock(sk)->tx_work_scheduled = false;
44 spin_unlock_bh(&sk->sk_write_queue.lock);
45}
46
47static void rawsock_report_error(struct sock *sk, int err)
48{
49 pr_debug("sk=%p err=%d\n", sk, err);
50
51 sk->sk_shutdown = SHUTDOWN_MASK;
52 sk->sk_err = -err;
53 sk_error_report(sk);
54
55 rawsock_write_queue_purge(sk);
56}
57
58static int rawsock_release(struct socket *sock)
59{
60 struct sock *sk = sock->sk;
61
62 pr_debug("sock=%p sk=%p\n", sock, sk);
63
64 if (!sk)
65 return 0;
66
67 if (sock->type == SOCK_RAW)
68 nfc_sock_unlink(&raw_sk_list, sk);
69
70 sock_orphan(sk);
71 sock_put(sk);
72
73 return 0;
74}
75
76static int rawsock_connect(struct socket *sock, struct sockaddr *_addr,
77 int len, int flags)
78{
79 struct sock *sk = sock->sk;
80 struct sockaddr_nfc *addr = (struct sockaddr_nfc *)_addr;
81 struct nfc_dev *dev;
82 int rc = 0;
83
84 pr_debug("sock=%p sk=%p flags=%d\n", sock, sk, flags);
85
86 if (!addr || len < sizeof(struct sockaddr_nfc) ||
87 addr->sa_family != AF_NFC)
88 return -EINVAL;
89
90 pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n",
91 addr->dev_idx, addr->target_idx, addr->nfc_protocol);
92
93 lock_sock(sk);
94
95 if (sock->state == SS_CONNECTED) {
96 rc = -EISCONN;
97 goto error;
98 }
99
100 dev = nfc_get_device(addr->dev_idx);
101 if (!dev) {
102 rc = -ENODEV;
103 goto error;
104 }
105
106 if (addr->target_idx > dev->target_next_idx - 1 ||
107 addr->target_idx < dev->target_next_idx - dev->n_targets) {
108 rc = -EINVAL;
109 goto put_dev;
110 }
111
112 rc = nfc_activate_target(dev, addr->target_idx, addr->nfc_protocol);
113 if (rc)
114 goto put_dev;
115
116 nfc_rawsock(sk)->dev = dev;
117 nfc_rawsock(sk)->target_idx = addr->target_idx;
118 sock->state = SS_CONNECTED;
119 sk->sk_state = TCP_ESTABLISHED;
120 sk->sk_state_change(sk);
121
122 release_sock(sk);
123 return 0;
124
125put_dev:
126 nfc_put_device(dev);
127error:
128 release_sock(sk);
129 return rc;
130}
131
132static int rawsock_add_header(struct sk_buff *skb)
133{
134 *(u8 *)skb_push(skb, NFC_HEADER_SIZE) = 0;
135
136 return 0;
137}
138
139static void rawsock_data_exchange_complete(void *context, struct sk_buff *skb,
140 int err)
141{
142 struct sock *sk = (struct sock *) context;
143
144 BUG_ON(in_hardirq());
145
146 pr_debug("sk=%p err=%d\n", sk, err);
147
148 if (err)
149 goto error;
150
151 err = rawsock_add_header(skb);
152 if (err)
153 goto error_skb;
154
155 err = sock_queue_rcv_skb(sk, skb);
156 if (err)
157 goto error_skb;
158
159 spin_lock_bh(&sk->sk_write_queue.lock);
160 if (!skb_queue_empty(&sk->sk_write_queue))
161 schedule_work(&nfc_rawsock(sk)->tx_work);
162 else
163 nfc_rawsock(sk)->tx_work_scheduled = false;
164 spin_unlock_bh(&sk->sk_write_queue.lock);
165
166 sock_put(sk);
167 return;
168
169error_skb:
170 kfree_skb(skb);
171
172error:
173 rawsock_report_error(sk, err);
174 sock_put(sk);
175}
176
177static void rawsock_tx_work(struct work_struct *work)
178{
179 struct sock *sk = to_rawsock_sk(work);
180 struct nfc_dev *dev = nfc_rawsock(sk)->dev;
181 u32 target_idx = nfc_rawsock(sk)->target_idx;
182 struct sk_buff *skb;
183 int rc;
184
185 pr_debug("sk=%p target_idx=%u\n", sk, target_idx);
186
187 if (sk->sk_shutdown & SEND_SHUTDOWN) {
188 rawsock_write_queue_purge(sk);
189 return;
190 }
191
192 skb = skb_dequeue(&sk->sk_write_queue);
193 kcov_remote_start_common(skb_get_kcov_handle(skb));
194
195 sock_hold(sk);
196 rc = nfc_data_exchange(dev, target_idx, skb,
197 rawsock_data_exchange_complete, sk);
198 if (rc) {
199 rawsock_report_error(sk, rc);
200 sock_put(sk);
201 }
202 kcov_remote_stop();
203}
204
205static int rawsock_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
206{
207 struct sock *sk = sock->sk;
208 struct nfc_dev *dev = nfc_rawsock(sk)->dev;
209 struct sk_buff *skb;
210 int rc;
211
212 pr_debug("sock=%p sk=%p len=%zu\n", sock, sk, len);
213
214 if (msg->msg_namelen)
215 return -EOPNOTSUPP;
216
217 if (sock->state != SS_CONNECTED)
218 return -ENOTCONN;
219
220 skb = nfc_alloc_send_skb(dev, sk, msg->msg_flags, len, &rc);
221 if (skb == NULL)
222 return rc;
223
224 rc = memcpy_from_msg(skb_put(skb, len), msg, len);
225 if (rc < 0) {
226 kfree_skb(skb);
227 return rc;
228 }
229
230 spin_lock_bh(&sk->sk_write_queue.lock);
231 __skb_queue_tail(&sk->sk_write_queue, skb);
232 if (!nfc_rawsock(sk)->tx_work_scheduled) {
233 schedule_work(&nfc_rawsock(sk)->tx_work);
234 nfc_rawsock(sk)->tx_work_scheduled = true;
235 }
236 spin_unlock_bh(&sk->sk_write_queue.lock);
237
238 return len;
239}
240
241static int rawsock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
242 int flags)
243{
244 struct sock *sk = sock->sk;
245 struct sk_buff *skb;
246 int copied;
247 int rc;
248
249 pr_debug("sock=%p sk=%p len=%zu flags=%d\n", sock, sk, len, flags);
250
251 skb = skb_recv_datagram(sk, flags, &rc);
252 if (!skb)
253 return rc;
254
255 copied = skb->len;
256 if (len < copied) {
257 msg->msg_flags |= MSG_TRUNC;
258 copied = len;
259 }
260
261 rc = skb_copy_datagram_msg(skb, 0, msg, copied);
262
263 skb_free_datagram(sk, skb);
264
265 return rc ? : copied;
266}
267
268static const struct proto_ops rawsock_ops = {
269 .family = PF_NFC,
270 .owner = THIS_MODULE,
271 .release = rawsock_release,
272 .bind = sock_no_bind,
273 .connect = rawsock_connect,
274 .socketpair = sock_no_socketpair,
275 .accept = sock_no_accept,
276 .getname = sock_no_getname,
277 .poll = datagram_poll,
278 .ioctl = sock_no_ioctl,
279 .listen = sock_no_listen,
280 .shutdown = sock_no_shutdown,
281 .sendmsg = rawsock_sendmsg,
282 .recvmsg = rawsock_recvmsg,
283 .mmap = sock_no_mmap,
284};
285
286static const struct proto_ops rawsock_raw_ops = {
287 .family = PF_NFC,
288 .owner = THIS_MODULE,
289 .release = rawsock_release,
290 .bind = sock_no_bind,
291 .connect = sock_no_connect,
292 .socketpair = sock_no_socketpair,
293 .accept = sock_no_accept,
294 .getname = sock_no_getname,
295 .poll = datagram_poll,
296 .ioctl = sock_no_ioctl,
297 .listen = sock_no_listen,
298 .shutdown = sock_no_shutdown,
299 .sendmsg = sock_no_sendmsg,
300 .recvmsg = rawsock_recvmsg,
301 .mmap = sock_no_mmap,
302};
303
304static void rawsock_destruct(struct sock *sk)
305{
306 pr_debug("sk=%p\n", sk);
307
308 if (sk->sk_state == TCP_ESTABLISHED) {
309 nfc_deactivate_target(nfc_rawsock(sk)->dev,
310 nfc_rawsock(sk)->target_idx,
311 NFC_TARGET_MODE_IDLE);
312 nfc_put_device(nfc_rawsock(sk)->dev);
313 }
314
315 skb_queue_purge(&sk->sk_receive_queue);
316
317 if (!sock_flag(sk, SOCK_DEAD)) {
318 pr_err("Freeing alive NFC raw socket %p\n", sk);
319 return;
320 }
321}
322
323static int rawsock_create(struct net *net, struct socket *sock,
324 const struct nfc_protocol *nfc_proto, int kern)
325{
326 struct sock *sk;
327
328 pr_debug("sock=%p\n", sock);
329
330 if ((sock->type != SOCK_SEQPACKET) && (sock->type != SOCK_RAW))
331 return -ESOCKTNOSUPPORT;
332
333 if (sock->type == SOCK_RAW) {
334 if (!ns_capable(net->user_ns, CAP_NET_RAW))
335 return -EPERM;
336 sock->ops = &rawsock_raw_ops;
337 } else {
338 sock->ops = &rawsock_ops;
339 }
340
341 sk = sk_alloc(net, PF_NFC, GFP_ATOMIC, nfc_proto->proto, kern);
342 if (!sk)
343 return -ENOMEM;
344
345 sock_init_data(sock, sk);
346 sk->sk_protocol = nfc_proto->id;
347 sk->sk_destruct = rawsock_destruct;
348 sock->state = SS_UNCONNECTED;
349 if (sock->type == SOCK_RAW)
350 nfc_sock_link(&raw_sk_list, sk);
351 else {
352 INIT_WORK(&nfc_rawsock(sk)->tx_work, rawsock_tx_work);
353 nfc_rawsock(sk)->tx_work_scheduled = false;
354 }
355
356 return 0;
357}
358
359void nfc_send_to_raw_sock(struct nfc_dev *dev, struct sk_buff *skb,
360 u8 payload_type, u8 direction)
361{
362 struct sk_buff *skb_copy = NULL, *nskb;
363 struct sock *sk;
364 u8 *data;
365
366 read_lock(&raw_sk_list.lock);
367
368 sk_for_each(sk, &raw_sk_list.head) {
369 if (!skb_copy) {
370 skb_copy = __pskb_copy_fclone(skb, NFC_RAW_HEADER_SIZE,
371 GFP_ATOMIC, true);
372 if (!skb_copy)
373 continue;
374
375 data = skb_push(skb_copy, NFC_RAW_HEADER_SIZE);
376
377 data[0] = dev ? dev->idx : 0xFF;
378 data[1] = direction & 0x01;
379 data[1] |= (payload_type << 1);
380 }
381
382 nskb = skb_clone(skb_copy, GFP_ATOMIC);
383 if (!nskb)
384 continue;
385
386 if (sock_queue_rcv_skb(sk, nskb))
387 kfree_skb(nskb);
388 }
389
390 read_unlock(&raw_sk_list.lock);
391
392 kfree_skb(skb_copy);
393}
394EXPORT_SYMBOL(nfc_send_to_raw_sock);
395
396static struct proto rawsock_proto = {
397 .name = "NFC_RAW",
398 .owner = THIS_MODULE,
399 .obj_size = sizeof(struct nfc_rawsock),
400};
401
402static const struct nfc_protocol rawsock_nfc_proto = {
403 .id = NFC_SOCKPROTO_RAW,
404 .proto = &rawsock_proto,
405 .owner = THIS_MODULE,
406 .create = rawsock_create
407};
408
409int __init rawsock_init(void)
410{
411 int rc;
412
413 rc = nfc_proto_register(&rawsock_nfc_proto);
414
415 return rc;
416}
417
418void rawsock_exit(void)
419{
420 nfc_proto_unregister(&rawsock_nfc_proto);
421}