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/list.h> | |
25 | #include <linux/nfc.h> | |
26 | ||
30cc4587 | 27 | #include "nfc.h" |
d646960f SO |
28 | #include "llcp.h" |
29 | ||
30 | static u8 llcp_magic[3] = {0x46, 0x66, 0x6d}; | |
31 | ||
32 | static struct list_head llcp_devices; | |
33 | ||
098dafcf TE |
34 | static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb); |
35 | ||
a69f32af | 36 | void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *sk) |
d646960f | 37 | { |
a69f32af SO |
38 | write_lock(&l->lock); |
39 | sk_add_node(sk, &l->head); | |
40 | write_unlock(&l->lock); | |
41 | } | |
d646960f | 42 | |
a69f32af SO |
43 | void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *sk) |
44 | { | |
45 | write_lock(&l->lock); | |
46 | sk_del_node_init(sk); | |
47 | write_unlock(&l->lock); | |
48 | } | |
d646960f | 49 | |
abd18d43 TE |
50 | void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock) |
51 | { | |
52 | sock->remote_rw = LLCP_DEFAULT_RW; | |
53 | sock->remote_miu = LLCP_MAX_MIU + 1; | |
54 | } | |
55 | ||
f31652a5 SO |
56 | static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock) |
57 | { | |
58 | struct nfc_llcp_local *local = sock->local; | |
59 | struct sk_buff *s, *tmp; | |
60 | ||
61 | pr_debug("%p\n", &sock->sk); | |
62 | ||
63 | skb_queue_purge(&sock->tx_queue); | |
64 | skb_queue_purge(&sock->tx_pending_queue); | |
f31652a5 SO |
65 | |
66 | if (local == NULL) | |
67 | return; | |
68 | ||
69 | /* Search for local pending SKBs that are related to this socket */ | |
70 | skb_queue_walk_safe(&local->tx_queue, s, tmp) { | |
71 | if (s->sk != &sock->sk) | |
72 | continue; | |
73 | ||
74 | skb_unlink(s, &local->tx_queue); | |
75 | kfree_skb(s); | |
76 | } | |
77 | } | |
78 | ||
b436a13d | 79 | static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool device, |
3bbc0ceb | 80 | int err) |
a69f32af SO |
81 | { |
82 | struct sock *sk; | |
b67bfe0d | 83 | struct hlist_node *tmp; |
a69f32af | 84 | struct nfc_llcp_sock *llcp_sock; |
d646960f | 85 | |
f31652a5 SO |
86 | skb_queue_purge(&local->tx_queue); |
87 | ||
a69f32af | 88 | write_lock(&local->sockets.lock); |
40c75f81 | 89 | |
b67bfe0d | 90 | sk_for_each_safe(sk, tmp, &local->sockets.head) { |
a69f32af | 91 | llcp_sock = nfc_llcp_sock(sk); |
d646960f | 92 | |
50b78b2a | 93 | bh_lock_sock(sk); |
d646960f | 94 | |
f31652a5 SO |
95 | nfc_llcp_socket_purge(llcp_sock); |
96 | ||
a69f32af SO |
97 | if (sk->sk_state == LLCP_CONNECTED) |
98 | nfc_put_device(llcp_sock->dev); | |
d646960f | 99 | |
a69f32af | 100 | if (sk->sk_state == LLCP_LISTEN) { |
d646960f SO |
101 | struct nfc_llcp_sock *lsk, *n; |
102 | struct sock *accept_sk; | |
103 | ||
0f450772 SJ |
104 | list_for_each_entry_safe(lsk, n, |
105 | &llcp_sock->accept_queue, | |
427a2eb1 | 106 | accept_queue) { |
d646960f | 107 | accept_sk = &lsk->sk; |
50b78b2a | 108 | bh_lock_sock(accept_sk); |
d646960f SO |
109 | |
110 | nfc_llcp_accept_unlink(accept_sk); | |
111 | ||
3bbc0ceb SO |
112 | if (err) |
113 | accept_sk->sk_err = err; | |
d646960f | 114 | accept_sk->sk_state = LLCP_CLOSED; |
3bbc0ceb | 115 | accept_sk->sk_state_change(sk); |
d646960f | 116 | |
50b78b2a | 117 | bh_unlock_sock(accept_sk); |
d646960f | 118 | } |
c8512be6 SO |
119 | } |
120 | ||
3bbc0ceb SO |
121 | if (err) |
122 | sk->sk_err = err; | |
a69f32af | 123 | sk->sk_state = LLCP_CLOSED; |
3bbc0ceb | 124 | sk->sk_state_change(sk); |
d646960f | 125 | |
50b78b2a | 126 | bh_unlock_sock(sk); |
d646960f | 127 | |
a69f32af | 128 | sk_del_node_init(sk); |
d646960f SO |
129 | } |
130 | ||
a69f32af | 131 | write_unlock(&local->sockets.lock); |
e6a3a4bb | 132 | |
b436a13d SO |
133 | /* If we still have a device, we keep the RAW sockets alive */ |
134 | if (device == true) | |
e6a3a4bb SO |
135 | return; |
136 | ||
137 | write_lock(&local->raw_sockets.lock); | |
138 | ||
139 | sk_for_each_safe(sk, tmp, &local->raw_sockets.head) { | |
140 | llcp_sock = nfc_llcp_sock(sk); | |
141 | ||
142 | bh_lock_sock(sk); | |
143 | ||
144 | nfc_llcp_socket_purge(llcp_sock); | |
145 | ||
3bbc0ceb SO |
146 | if (err) |
147 | sk->sk_err = err; | |
e6a3a4bb | 148 | sk->sk_state = LLCP_CLOSED; |
e6a3a4bb SO |
149 | sk->sk_state_change(sk); |
150 | ||
151 | bh_unlock_sock(sk); | |
152 | ||
e6a3a4bb SO |
153 | sk_del_node_init(sk); |
154 | } | |
155 | ||
156 | write_unlock(&local->raw_sockets.lock); | |
d646960f SO |
157 | } |
158 | ||
c7aa1225 SO |
159 | struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local) |
160 | { | |
161 | kref_get(&local->ref); | |
162 | ||
163 | return local; | |
164 | } | |
165 | ||
c470e319 | 166 | static void local_cleanup(struct nfc_llcp_local *local) |
c7aa1225 | 167 | { |
c470e319 | 168 | nfc_llcp_socket_release(local, false, ENXIO); |
c7aa1225 SO |
169 | del_timer_sync(&local->link_timer); |
170 | skb_queue_purge(&local->tx_queue); | |
474fee3d TH |
171 | cancel_work_sync(&local->tx_work); |
172 | cancel_work_sync(&local->rx_work); | |
173 | cancel_work_sync(&local->timeout_work); | |
c7aa1225 | 174 | kfree_skb(local->rx_pending); |
40213fa8 TE |
175 | del_timer_sync(&local->sdreq_timer); |
176 | cancel_work_sync(&local->sdreq_timeout_work); | |
d9b8d8e1 | 177 | nfc_llcp_free_sdp_tlv_list(&local->pending_sdreqs); |
3536da06 SO |
178 | } |
179 | ||
180 | static void local_release(struct kref *ref) | |
181 | { | |
182 | struct nfc_llcp_local *local; | |
183 | ||
184 | local = container_of(ref, struct nfc_llcp_local, ref); | |
185 | ||
186 | list_del(&local->list); | |
c470e319 | 187 | local_cleanup(local); |
c7aa1225 SO |
188 | kfree(local); |
189 | } | |
190 | ||
191 | int nfc_llcp_local_put(struct nfc_llcp_local *local) | |
192 | { | |
a69f32af SO |
193 | if (local == NULL) |
194 | return 0; | |
195 | ||
c7aa1225 SO |
196 | return kref_put(&local->ref, local_release); |
197 | } | |
198 | ||
8f50020e SO |
199 | static struct nfc_llcp_sock *nfc_llcp_sock_get(struct nfc_llcp_local *local, |
200 | u8 ssap, u8 dsap) | |
201 | { | |
202 | struct sock *sk; | |
a8df0f37 | 203 | struct nfc_llcp_sock *llcp_sock, *tmp_sock; |
8f50020e SO |
204 | |
205 | pr_debug("ssap dsap %d %d\n", ssap, dsap); | |
206 | ||
207 | if (ssap == 0 && dsap == 0) | |
208 | return NULL; | |
209 | ||
210 | read_lock(&local->sockets.lock); | |
211 | ||
212 | llcp_sock = NULL; | |
213 | ||
b67bfe0d | 214 | sk_for_each(sk, &local->sockets.head) { |
a8df0f37 | 215 | tmp_sock = nfc_llcp_sock(sk); |
8f50020e | 216 | |
a8df0f37 SO |
217 | if (tmp_sock->ssap == ssap && tmp_sock->dsap == dsap) { |
218 | llcp_sock = tmp_sock; | |
8f50020e | 219 | break; |
a8df0f37 | 220 | } |
8f50020e SO |
221 | } |
222 | ||
223 | read_unlock(&local->sockets.lock); | |
224 | ||
225 | if (llcp_sock == NULL) | |
226 | return NULL; | |
227 | ||
228 | sock_hold(&llcp_sock->sk); | |
229 | ||
230 | return llcp_sock; | |
231 | } | |
232 | ||
233 | static void nfc_llcp_sock_put(struct nfc_llcp_sock *sock) | |
234 | { | |
235 | sock_put(&sock->sk); | |
236 | } | |
237 | ||
d646960f SO |
238 | static void nfc_llcp_timeout_work(struct work_struct *work) |
239 | { | |
240 | struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, | |
427a2eb1 | 241 | timeout_work); |
d646960f SO |
242 | |
243 | nfc_dep_link_down(local->dev); | |
244 | } | |
245 | ||
246 | static void nfc_llcp_symm_timer(unsigned long data) | |
247 | { | |
248 | struct nfc_llcp_local *local = (struct nfc_llcp_local *) data; | |
249 | ||
250 | pr_err("SYMM timeout\n"); | |
251 | ||
916082b0 | 252 | schedule_work(&local->timeout_work); |
d646960f SO |
253 | } |
254 | ||
40213fa8 TE |
255 | static void nfc_llcp_sdreq_timeout_work(struct work_struct *work) |
256 | { | |
257 | unsigned long time; | |
258 | HLIST_HEAD(nl_sdres_list); | |
259 | struct hlist_node *n; | |
260 | struct nfc_llcp_sdp_tlv *sdp; | |
261 | struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, | |
262 | sdreq_timeout_work); | |
263 | ||
264 | mutex_lock(&local->sdreq_lock); | |
265 | ||
266 | time = jiffies - msecs_to_jiffies(3 * local->remote_lto); | |
267 | ||
268 | hlist_for_each_entry_safe(sdp, n, &local->pending_sdreqs, node) { | |
269 | if (time_after(sdp->time, time)) | |
270 | continue; | |
271 | ||
272 | sdp->sap = LLCP_SDP_UNBOUND; | |
273 | ||
274 | hlist_del(&sdp->node); | |
275 | ||
276 | hlist_add_head(&sdp->node, &nl_sdres_list); | |
277 | } | |
278 | ||
279 | if (!hlist_empty(&local->pending_sdreqs)) | |
280 | mod_timer(&local->sdreq_timer, | |
281 | jiffies + msecs_to_jiffies(3 * local->remote_lto)); | |
282 | ||
283 | mutex_unlock(&local->sdreq_lock); | |
284 | ||
285 | if (!hlist_empty(&nl_sdres_list)) | |
286 | nfc_genl_llc_send_sdres(local->dev, &nl_sdres_list); | |
287 | } | |
288 | ||
289 | static void nfc_llcp_sdreq_timer(unsigned long data) | |
290 | { | |
291 | struct nfc_llcp_local *local = (struct nfc_llcp_local *) data; | |
292 | ||
293 | schedule_work(&local->sdreq_timeout_work); | |
294 | } | |
295 | ||
d646960f SO |
296 | struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev) |
297 | { | |
298 | struct nfc_llcp_local *local, *n; | |
299 | ||
300 | list_for_each_entry_safe(local, n, &llcp_devices, list) | |
301 | if (local->dev == dev) | |
302 | return local; | |
303 | ||
304 | pr_debug("No device found\n"); | |
305 | ||
306 | return NULL; | |
307 | } | |
308 | ||
309 | static char *wks[] = { | |
310 | NULL, | |
311 | NULL, /* SDP */ | |
312 | "urn:nfc:sn:ip", | |
313 | "urn:nfc:sn:obex", | |
314 | "urn:nfc:sn:snep", | |
315 | }; | |
316 | ||
317 | static int nfc_llcp_wks_sap(char *service_name, size_t service_name_len) | |
318 | { | |
319 | int sap, num_wks; | |
320 | ||
321 | pr_debug("%s\n", service_name); | |
322 | ||
323 | if (service_name == NULL) | |
324 | return -EINVAL; | |
325 | ||
326 | num_wks = ARRAY_SIZE(wks); | |
327 | ||
427a2eb1 | 328 | for (sap = 0; sap < num_wks; sap++) { |
d646960f SO |
329 | if (wks[sap] == NULL) |
330 | continue; | |
331 | ||
332 | if (strncmp(wks[sap], service_name, service_name_len) == 0) | |
333 | return sap; | |
334 | } | |
335 | ||
336 | return -EINVAL; | |
337 | } | |
338 | ||
8f50020e SO |
339 | static |
340 | struct nfc_llcp_sock *nfc_llcp_sock_from_sn(struct nfc_llcp_local *local, | |
341 | u8 *sn, size_t sn_len) | |
342 | { | |
343 | struct sock *sk; | |
8f50020e SO |
344 | struct nfc_llcp_sock *llcp_sock, *tmp_sock; |
345 | ||
346 | pr_debug("sn %zd %p\n", sn_len, sn); | |
347 | ||
348 | if (sn == NULL || sn_len == 0) | |
349 | return NULL; | |
350 | ||
351 | read_lock(&local->sockets.lock); | |
352 | ||
353 | llcp_sock = NULL; | |
354 | ||
b67bfe0d | 355 | sk_for_each(sk, &local->sockets.head) { |
8f50020e SO |
356 | tmp_sock = nfc_llcp_sock(sk); |
357 | ||
358 | pr_debug("llcp sock %p\n", tmp_sock); | |
359 | ||
54292d64 SO |
360 | if (tmp_sock->sk.sk_type == SOCK_STREAM && |
361 | tmp_sock->sk.sk_state != LLCP_LISTEN) | |
362 | continue; | |
363 | ||
364 | if (tmp_sock->sk.sk_type == SOCK_DGRAM && | |
365 | tmp_sock->sk.sk_state != LLCP_BOUND) | |
8f50020e SO |
366 | continue; |
367 | ||
368 | if (tmp_sock->service_name == NULL || | |
369 | tmp_sock->service_name_len == 0) | |
370 | continue; | |
371 | ||
372 | if (tmp_sock->service_name_len != sn_len) | |
373 | continue; | |
374 | ||
375 | if (memcmp(sn, tmp_sock->service_name, sn_len) == 0) { | |
376 | llcp_sock = tmp_sock; | |
377 | break; | |
378 | } | |
379 | } | |
380 | ||
381 | read_unlock(&local->sockets.lock); | |
382 | ||
383 | pr_debug("Found llcp sock %p\n", llcp_sock); | |
384 | ||
385 | return llcp_sock; | |
386 | } | |
387 | ||
d646960f | 388 | u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, |
427a2eb1 | 389 | struct nfc_llcp_sock *sock) |
d646960f SO |
390 | { |
391 | mutex_lock(&local->sdp_lock); | |
392 | ||
393 | if (sock->service_name != NULL && sock->service_name_len > 0) { | |
394 | int ssap = nfc_llcp_wks_sap(sock->service_name, | |
427a2eb1 | 395 | sock->service_name_len); |
d646960f SO |
396 | |
397 | if (ssap > 0) { | |
398 | pr_debug("WKS %d\n", ssap); | |
399 | ||
400 | /* This is a WKS, let's check if it's free */ | |
401 | if (local->local_wks & BIT(ssap)) { | |
402 | mutex_unlock(&local->sdp_lock); | |
403 | ||
404 | return LLCP_SAP_MAX; | |
405 | } | |
406 | ||
1762c17c | 407 | set_bit(ssap, &local->local_wks); |
d646960f SO |
408 | mutex_unlock(&local->sdp_lock); |
409 | ||
410 | return ssap; | |
411 | } | |
412 | ||
413 | /* | |
8f50020e SO |
414 | * Check if there already is a non WKS socket bound |
415 | * to this service name. | |
d646960f | 416 | */ |
8f50020e SO |
417 | if (nfc_llcp_sock_from_sn(local, sock->service_name, |
418 | sock->service_name_len) != NULL) { | |
d646960f SO |
419 | mutex_unlock(&local->sdp_lock); |
420 | ||
421 | return LLCP_SAP_MAX; | |
422 | } | |
423 | ||
d646960f SO |
424 | mutex_unlock(&local->sdp_lock); |
425 | ||
8f50020e | 426 | return LLCP_SDP_UNBOUND; |
d646960f | 427 | |
ebbb16d9 SO |
428 | } else if (sock->ssap != 0 && sock->ssap < LLCP_WKS_NUM_SAP) { |
429 | if (!test_bit(sock->ssap, &local->local_wks)) { | |
430 | set_bit(sock->ssap, &local->local_wks); | |
431 | mutex_unlock(&local->sdp_lock); | |
d646960f | 432 | |
ebbb16d9 | 433 | return sock->ssap; |
d646960f SO |
434 | } |
435 | } | |
436 | ||
437 | mutex_unlock(&local->sdp_lock); | |
438 | ||
439 | return LLCP_SAP_MAX; | |
440 | } | |
441 | ||
442 | u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local) | |
443 | { | |
444 | u8 local_ssap; | |
445 | ||
446 | mutex_lock(&local->sdp_lock); | |
447 | ||
448 | local_ssap = find_first_zero_bit(&local->local_sap, LLCP_LOCAL_NUM_SAP); | |
449 | if (local_ssap == LLCP_LOCAL_NUM_SAP) { | |
450 | mutex_unlock(&local->sdp_lock); | |
451 | return LLCP_SAP_MAX; | |
452 | } | |
453 | ||
1762c17c | 454 | set_bit(local_ssap, &local->local_sap); |
d646960f SO |
455 | |
456 | mutex_unlock(&local->sdp_lock); | |
457 | ||
458 | return local_ssap + LLCP_LOCAL_SAP_OFFSET; | |
459 | } | |
460 | ||
461 | void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap) | |
462 | { | |
463 | u8 local_ssap; | |
464 | unsigned long *sdp; | |
465 | ||
466 | if (ssap < LLCP_WKS_NUM_SAP) { | |
467 | local_ssap = ssap; | |
468 | sdp = &local->local_wks; | |
469 | } else if (ssap < LLCP_LOCAL_NUM_SAP) { | |
8f50020e SO |
470 | atomic_t *client_cnt; |
471 | ||
d646960f SO |
472 | local_ssap = ssap - LLCP_WKS_NUM_SAP; |
473 | sdp = &local->local_sdp; | |
8f50020e SO |
474 | client_cnt = &local->local_sdp_cnt[local_ssap]; |
475 | ||
476 | pr_debug("%d clients\n", atomic_read(client_cnt)); | |
477 | ||
478 | mutex_lock(&local->sdp_lock); | |
479 | ||
480 | if (atomic_dec_and_test(client_cnt)) { | |
481 | struct nfc_llcp_sock *l_sock; | |
482 | ||
483 | pr_debug("No more clients for SAP %d\n", ssap); | |
484 | ||
485 | clear_bit(local_ssap, sdp); | |
486 | ||
487 | /* Find the listening sock and set it back to UNBOUND */ | |
488 | l_sock = nfc_llcp_sock_get(local, ssap, LLCP_SAP_SDP); | |
489 | if (l_sock) { | |
490 | l_sock->ssap = LLCP_SDP_UNBOUND; | |
491 | nfc_llcp_sock_put(l_sock); | |
492 | } | |
493 | } | |
494 | ||
495 | mutex_unlock(&local->sdp_lock); | |
496 | ||
497 | return; | |
d646960f SO |
498 | } else if (ssap < LLCP_MAX_SAP) { |
499 | local_ssap = ssap - LLCP_LOCAL_NUM_SAP; | |
500 | sdp = &local->local_sap; | |
501 | } else { | |
502 | return; | |
503 | } | |
504 | ||
505 | mutex_lock(&local->sdp_lock); | |
506 | ||
1762c17c | 507 | clear_bit(local_ssap, sdp); |
d646960f SO |
508 | |
509 | mutex_unlock(&local->sdp_lock); | |
510 | } | |
511 | ||
8f50020e SO |
512 | static u8 nfc_llcp_reserve_sdp_ssap(struct nfc_llcp_local *local) |
513 | { | |
514 | u8 ssap; | |
515 | ||
516 | mutex_lock(&local->sdp_lock); | |
517 | ||
518 | ssap = find_first_zero_bit(&local->local_sdp, LLCP_SDP_NUM_SAP); | |
519 | if (ssap == LLCP_SDP_NUM_SAP) { | |
520 | mutex_unlock(&local->sdp_lock); | |
521 | ||
522 | return LLCP_SAP_MAX; | |
523 | } | |
524 | ||
525 | pr_debug("SDP ssap %d\n", LLCP_WKS_NUM_SAP + ssap); | |
526 | ||
527 | set_bit(ssap, &local->local_sdp); | |
528 | ||
529 | mutex_unlock(&local->sdp_lock); | |
530 | ||
531 | return LLCP_WKS_NUM_SAP + ssap; | |
532 | } | |
533 | ||
d646960f SO |
534 | static int nfc_llcp_build_gb(struct nfc_llcp_local *local) |
535 | { | |
536 | u8 *gb_cur, *version_tlv, version, version_length; | |
52feb444 | 537 | u8 *lto_tlv, lto_length; |
d646960f | 538 | u8 *wks_tlv, wks_length; |
56d5876a | 539 | u8 *miux_tlv, miux_length; |
d646960f | 540 | u8 gb_len = 0; |
52da2449 | 541 | int ret = 0; |
d646960f SO |
542 | |
543 | version = LLCP_VERSION_11; | |
544 | version_tlv = nfc_llcp_build_tlv(LLCP_TLV_VERSION, &version, | |
427a2eb1 | 545 | 1, &version_length); |
d646960f SO |
546 | gb_len += version_length; |
547 | ||
52feb444 | 548 | lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, &local->lto, 1, <o_length); |
d646960f SO |
549 | gb_len += lto_length; |
550 | ||
551 | pr_debug("Local wks 0x%lx\n", local->local_wks); | |
552 | wks_tlv = nfc_llcp_build_tlv(LLCP_TLV_WKS, (u8 *)&local->local_wks, 2, | |
427a2eb1 | 553 | &wks_length); |
d646960f SO |
554 | gb_len += wks_length; |
555 | ||
52feb444 | 556 | miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0, |
56d5876a SO |
557 | &miux_length); |
558 | gb_len += miux_length; | |
559 | ||
d646960f SO |
560 | gb_len += ARRAY_SIZE(llcp_magic); |
561 | ||
562 | if (gb_len > NFC_MAX_GT_LEN) { | |
52da2449 WY |
563 | ret = -EINVAL; |
564 | goto out; | |
d646960f SO |
565 | } |
566 | ||
567 | gb_cur = local->gb; | |
568 | ||
569 | memcpy(gb_cur, llcp_magic, ARRAY_SIZE(llcp_magic)); | |
570 | gb_cur += ARRAY_SIZE(llcp_magic); | |
571 | ||
572 | memcpy(gb_cur, version_tlv, version_length); | |
573 | gb_cur += version_length; | |
574 | ||
575 | memcpy(gb_cur, lto_tlv, lto_length); | |
576 | gb_cur += lto_length; | |
577 | ||
578 | memcpy(gb_cur, wks_tlv, wks_length); | |
579 | gb_cur += wks_length; | |
580 | ||
56d5876a SO |
581 | memcpy(gb_cur, miux_tlv, miux_length); |
582 | gb_cur += miux_length; | |
583 | ||
52da2449 WY |
584 | local->gb_len = gb_len; |
585 | ||
586 | out: | |
d646960f SO |
587 | kfree(version_tlv); |
588 | kfree(lto_tlv); | |
52da2449 WY |
589 | kfree(wks_tlv); |
590 | kfree(miux_tlv); | |
d646960f | 591 | |
52da2449 | 592 | return ret; |
d646960f SO |
593 | } |
594 | ||
b8e7a06d SO |
595 | u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len) |
596 | { | |
597 | struct nfc_llcp_local *local; | |
598 | ||
599 | local = nfc_llcp_find_local(dev); | |
600 | if (local == NULL) { | |
601 | *general_bytes_len = 0; | |
602 | return NULL; | |
603 | } | |
604 | ||
605 | nfc_llcp_build_gb(local); | |
606 | ||
607 | *general_bytes_len = local->gb_len; | |
608 | ||
609 | return local->gb; | |
610 | } | |
611 | ||
d646960f SO |
612 | int nfc_llcp_set_remote_gb(struct nfc_dev *dev, u8 *gb, u8 gb_len) |
613 | { | |
614 | struct nfc_llcp_local *local = nfc_llcp_find_local(dev); | |
615 | ||
616 | if (local == NULL) { | |
617 | pr_err("No LLCP device\n"); | |
618 | return -ENODEV; | |
619 | } | |
e9a4aa3b DC |
620 | if (gb_len < 3) |
621 | return -EINVAL; | |
d646960f SO |
622 | |
623 | memset(local->remote_gb, 0, NFC_MAX_GT_LEN); | |
624 | memcpy(local->remote_gb, gb, gb_len); | |
625 | local->remote_gb_len = gb_len; | |
626 | ||
d646960f SO |
627 | if (memcmp(local->remote_gb, llcp_magic, 3)) { |
628 | pr_err("MAC does not support LLCP\n"); | |
629 | return -EINVAL; | |
630 | } | |
631 | ||
7a06e586 SO |
632 | return nfc_llcp_parse_gb_tlv(local, |
633 | &local->remote_gb[3], | |
634 | local->remote_gb_len - 3); | |
d646960f SO |
635 | } |
636 | ||
d646960f SO |
637 | static u8 nfc_llcp_dsap(struct sk_buff *pdu) |
638 | { | |
639 | return (pdu->data[0] & 0xfc) >> 2; | |
640 | } | |
641 | ||
642 | static u8 nfc_llcp_ptype(struct sk_buff *pdu) | |
643 | { | |
644 | return ((pdu->data[0] & 0x03) << 2) | ((pdu->data[1] & 0xc0) >> 6); | |
645 | } | |
646 | ||
647 | static u8 nfc_llcp_ssap(struct sk_buff *pdu) | |
648 | { | |
649 | return pdu->data[1] & 0x3f; | |
650 | } | |
651 | ||
652 | static u8 nfc_llcp_ns(struct sk_buff *pdu) | |
653 | { | |
654 | return pdu->data[2] >> 4; | |
655 | } | |
656 | ||
657 | static u8 nfc_llcp_nr(struct sk_buff *pdu) | |
658 | { | |
659 | return pdu->data[2] & 0xf; | |
660 | } | |
661 | ||
662 | static void nfc_llcp_set_nrns(struct nfc_llcp_sock *sock, struct sk_buff *pdu) | |
663 | { | |
279cf174 | 664 | pdu->data[2] = (sock->send_n << 4) | (sock->recv_n); |
d646960f SO |
665 | sock->send_n = (sock->send_n + 1) % 16; |
666 | sock->recv_ack_n = (sock->recv_n - 1) % 16; | |
667 | } | |
668 | ||
4463523b TE |
669 | void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local, |
670 | struct sk_buff *skb, u8 direction) | |
671 | { | |
4463523b TE |
672 | struct sk_buff *skb_copy = NULL, *nskb; |
673 | struct sock *sk; | |
674 | u8 *data; | |
675 | ||
676 | read_lock(&local->raw_sockets.lock); | |
677 | ||
b67bfe0d | 678 | sk_for_each(sk, &local->raw_sockets.head) { |
4463523b TE |
679 | if (sk->sk_state != LLCP_BOUND) |
680 | continue; | |
681 | ||
682 | if (skb_copy == NULL) { | |
683 | skb_copy = __pskb_copy(skb, NFC_LLCP_RAW_HEADER_SIZE, | |
684 | GFP_ATOMIC); | |
685 | ||
686 | if (skb_copy == NULL) | |
687 | continue; | |
688 | ||
689 | data = skb_push(skb_copy, NFC_LLCP_RAW_HEADER_SIZE); | |
690 | ||
691 | data[0] = local->dev ? local->dev->idx : 0xFF; | |
692 | data[1] = direction; | |
693 | } | |
694 | ||
695 | nskb = skb_clone(skb_copy, GFP_ATOMIC); | |
696 | if (!nskb) | |
697 | continue; | |
698 | ||
699 | if (sock_queue_rcv_skb(sk, nskb)) | |
700 | kfree_skb(nskb); | |
701 | } | |
702 | ||
703 | read_unlock(&local->raw_sockets.lock); | |
704 | ||
705 | kfree_skb(skb_copy); | |
706 | } | |
707 | ||
84457960 SO |
708 | static void nfc_llcp_tx_work(struct work_struct *work) |
709 | { | |
710 | struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, | |
711 | tx_work); | |
712 | struct sk_buff *skb; | |
713 | struct sock *sk; | |
714 | struct nfc_llcp_sock *llcp_sock; | |
715 | ||
716 | skb = skb_dequeue(&local->tx_queue); | |
717 | if (skb != NULL) { | |
718 | sk = skb->sk; | |
719 | llcp_sock = nfc_llcp_sock(sk); | |
a6a0915f SO |
720 | |
721 | if (llcp_sock == NULL && nfc_llcp_ptype(skb) == LLCP_PDU_I) { | |
f1b79dc8 | 722 | kfree_skb(skb); |
a6a0915f SO |
723 | nfc_llcp_send_symm(local->dev); |
724 | } else { | |
be02b6b6 SO |
725 | struct sk_buff *copy_skb = NULL; |
726 | u8 ptype = nfc_llcp_ptype(skb); | |
84457960 SO |
727 | int ret; |
728 | ||
729 | pr_debug("Sending pending skb\n"); | |
730 | print_hex_dump(KERN_DEBUG, "LLCP Tx: ", | |
731 | DUMP_PREFIX_OFFSET, 16, 1, | |
732 | skb->data, skb->len, true); | |
733 | ||
17f7ae16 TE |
734 | if (ptype == LLCP_PDU_DISC && sk != NULL && |
735 | sk->sk_state == LLCP_DISCONNECTING) { | |
736 | nfc_llcp_sock_unlink(&local->sockets, sk); | |
737 | sock_orphan(sk); | |
738 | sock_put(sk); | |
739 | } | |
740 | ||
be02b6b6 SO |
741 | if (ptype == LLCP_PDU_I) |
742 | copy_skb = skb_copy(skb, GFP_ATOMIC); | |
743 | ||
2c2d45bd TE |
744 | __net_timestamp(skb); |
745 | ||
4463523b TE |
746 | nfc_llcp_send_to_raw_sock(local, skb, |
747 | NFC_LLCP_DIRECTION_TX); | |
748 | ||
84457960 SO |
749 | ret = nfc_data_exchange(local->dev, local->target_idx, |
750 | skb, nfc_llcp_recv, local); | |
751 | ||
be02b6b6 SO |
752 | if (ret) { |
753 | kfree_skb(copy_skb); | |
754 | goto out; | |
84457960 | 755 | } |
be02b6b6 SO |
756 | |
757 | if (ptype == LLCP_PDU_I && copy_skb) | |
758 | skb_queue_tail(&llcp_sock->tx_pending_queue, | |
759 | copy_skb); | |
84457960 SO |
760 | } |
761 | } else { | |
762 | nfc_llcp_send_symm(local->dev); | |
763 | } | |
764 | ||
be02b6b6 | 765 | out: |
84457960 SO |
766 | mod_timer(&local->link_timer, |
767 | jiffies + msecs_to_jiffies(2 * local->remote_lto)); | |
768 | } | |
769 | ||
a69f32af SO |
770 | static struct nfc_llcp_sock *nfc_llcp_connecting_sock_get(struct nfc_llcp_local *local, |
771 | u8 ssap) | |
772 | { | |
773 | struct sock *sk; | |
774 | struct nfc_llcp_sock *llcp_sock; | |
a69f32af SO |
775 | |
776 | read_lock(&local->connecting_sockets.lock); | |
777 | ||
b67bfe0d | 778 | sk_for_each(sk, &local->connecting_sockets.head) { |
a69f32af SO |
779 | llcp_sock = nfc_llcp_sock(sk); |
780 | ||
5a0f6f3b SO |
781 | if (llcp_sock->ssap == ssap) { |
782 | sock_hold(&llcp_sock->sk); | |
a69f32af | 783 | goto out; |
5a0f6f3b | 784 | } |
a69f32af SO |
785 | } |
786 | ||
787 | llcp_sock = NULL; | |
788 | ||
789 | out: | |
790 | read_unlock(&local->connecting_sockets.lock); | |
791 | ||
a69f32af SO |
792 | return llcp_sock; |
793 | } | |
794 | ||
a69f32af SO |
795 | static struct nfc_llcp_sock *nfc_llcp_sock_get_sn(struct nfc_llcp_local *local, |
796 | u8 *sn, size_t sn_len) | |
797 | { | |
a69f32af SO |
798 | struct nfc_llcp_sock *llcp_sock; |
799 | ||
8f50020e | 800 | llcp_sock = nfc_llcp_sock_from_sn(local, sn, sn_len); |
d646960f | 801 | |
a69f32af SO |
802 | if (llcp_sock == NULL) |
803 | return NULL; | |
d646960f | 804 | |
a69f32af SO |
805 | sock_hold(&llcp_sock->sk); |
806 | ||
807 | return llcp_sock; | |
d646960f SO |
808 | } |
809 | ||
d646960f SO |
810 | static u8 *nfc_llcp_connect_sn(struct sk_buff *skb, size_t *sn_len) |
811 | { | |
812 | u8 *tlv = &skb->data[2], type, length; | |
813 | size_t tlv_array_len = skb->len - LLCP_HEADER_SIZE, offset = 0; | |
814 | ||
815 | while (offset < tlv_array_len) { | |
816 | type = tlv[0]; | |
817 | length = tlv[1]; | |
818 | ||
819 | pr_debug("type 0x%x length %d\n", type, length); | |
820 | ||
821 | if (type == LLCP_TLV_SN) { | |
822 | *sn_len = length; | |
823 | return &tlv[2]; | |
824 | } | |
825 | ||
826 | offset += length + 2; | |
827 | tlv += length + 2; | |
828 | } | |
829 | ||
830 | return NULL; | |
831 | } | |
832 | ||
968272bf SO |
833 | static void nfc_llcp_recv_ui(struct nfc_llcp_local *local, |
834 | struct sk_buff *skb) | |
835 | { | |
836 | struct nfc_llcp_sock *llcp_sock; | |
837 | struct nfc_llcp_ui_cb *ui_cb; | |
838 | u8 dsap, ssap; | |
839 | ||
840 | dsap = nfc_llcp_dsap(skb); | |
841 | ssap = nfc_llcp_ssap(skb); | |
842 | ||
843 | ui_cb = nfc_llcp_ui_skb_cb(skb); | |
844 | ui_cb->dsap = dsap; | |
845 | ui_cb->ssap = ssap; | |
846 | ||
968272bf SO |
847 | pr_debug("%d %d\n", dsap, ssap); |
848 | ||
849 | /* We're looking for a bound socket, not a client one */ | |
850 | llcp_sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP); | |
851 | if (llcp_sock == NULL || llcp_sock->sk.sk_type != SOCK_DGRAM) | |
852 | return; | |
853 | ||
854 | /* There is no sequence with UI frames */ | |
855 | skb_pull(skb, LLCP_HEADER_SIZE); | |
1727cf93 SO |
856 | if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) { |
857 | /* | |
858 | * UI frames will be freed from the socket layer, so we | |
859 | * need to keep them alive until someone receives them. | |
860 | */ | |
861 | skb_get(skb); | |
862 | } else { | |
863 | pr_err("Receive queue is full\n"); | |
968272bf SO |
864 | } |
865 | ||
866 | nfc_llcp_sock_put(llcp_sock); | |
867 | } | |
868 | ||
d646960f | 869 | static void nfc_llcp_recv_connect(struct nfc_llcp_local *local, |
427a2eb1 | 870 | struct sk_buff *skb) |
d646960f SO |
871 | { |
872 | struct sock *new_sk, *parent; | |
873 | struct nfc_llcp_sock *sock, *new_sock; | |
a69f32af | 874 | u8 dsap, ssap, reason; |
d646960f SO |
875 | |
876 | dsap = nfc_llcp_dsap(skb); | |
877 | ssap = nfc_llcp_ssap(skb); | |
878 | ||
879 | pr_debug("%d %d\n", dsap, ssap); | |
880 | ||
d646960f | 881 | if (dsap != LLCP_SAP_SDP) { |
a69f32af SO |
882 | sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP); |
883 | if (sock == NULL || sock->sk.sk_state != LLCP_LISTEN) { | |
d646960f SO |
884 | reason = LLCP_DM_NOBOUND; |
885 | goto fail; | |
886 | } | |
d646960f SO |
887 | } else { |
888 | u8 *sn; | |
889 | size_t sn_len; | |
890 | ||
891 | sn = nfc_llcp_connect_sn(skb, &sn_len); | |
892 | if (sn == NULL) { | |
893 | reason = LLCP_DM_NOBOUND; | |
894 | goto fail; | |
895 | } | |
896 | ||
897 | pr_debug("Service name length %zu\n", sn_len); | |
898 | ||
a69f32af SO |
899 | sock = nfc_llcp_sock_get_sn(local, sn, sn_len); |
900 | if (sock == NULL) { | |
901 | reason = LLCP_DM_NOBOUND; | |
902 | goto fail; | |
d646960f | 903 | } |
d646960f SO |
904 | } |
905 | ||
a69f32af | 906 | lock_sock(&sock->sk); |
d646960f | 907 | |
d646960f SO |
908 | parent = &sock->sk; |
909 | ||
910 | if (sk_acceptq_is_full(parent)) { | |
911 | reason = LLCP_DM_REJ; | |
912 | release_sock(&sock->sk); | |
913 | sock_put(&sock->sk); | |
914 | goto fail; | |
915 | } | |
916 | ||
8f50020e SO |
917 | if (sock->ssap == LLCP_SDP_UNBOUND) { |
918 | u8 ssap = nfc_llcp_reserve_sdp_ssap(local); | |
919 | ||
920 | pr_debug("First client, reserving %d\n", ssap); | |
921 | ||
922 | if (ssap == LLCP_SAP_MAX) { | |
923 | reason = LLCP_DM_REJ; | |
924 | release_sock(&sock->sk); | |
925 | sock_put(&sock->sk); | |
926 | goto fail; | |
927 | } | |
928 | ||
929 | sock->ssap = ssap; | |
930 | } | |
931 | ||
427a2eb1 | 932 | new_sk = nfc_llcp_sock_alloc(NULL, parent->sk_type, GFP_ATOMIC); |
d646960f SO |
933 | if (new_sk == NULL) { |
934 | reason = LLCP_DM_REJ; | |
935 | release_sock(&sock->sk); | |
936 | sock_put(&sock->sk); | |
937 | goto fail; | |
938 | } | |
939 | ||
940 | new_sock = nfc_llcp_sock(new_sk); | |
941 | new_sock->dev = local->dev; | |
c7aa1225 | 942 | new_sock->local = nfc_llcp_local_get(local); |
06d44f80 SO |
943 | new_sock->rw = sock->rw; |
944 | new_sock->miux = sock->miux; | |
e4306bec | 945 | new_sock->remote_miu = local->remote_miu; |
d646960f | 946 | new_sock->nfc_protocol = sock->nfc_protocol; |
d646960f | 947 | new_sock->dsap = ssap; |
025f1520 | 948 | new_sock->target_idx = local->target_idx; |
d646960f | 949 | new_sock->parent = parent; |
8f50020e SO |
950 | new_sock->ssap = sock->ssap; |
951 | if (sock->ssap < LLCP_LOCAL_NUM_SAP && sock->ssap >= LLCP_WKS_NUM_SAP) { | |
952 | atomic_t *client_count; | |
953 | ||
954 | pr_debug("reserved_ssap %d for %p\n", sock->ssap, new_sock); | |
955 | ||
956 | client_count = | |
957 | &local->local_sdp_cnt[sock->ssap - LLCP_WKS_NUM_SAP]; | |
958 | ||
959 | atomic_inc(client_count); | |
960 | new_sock->reserved_ssap = sock->ssap; | |
961 | } | |
d646960f | 962 | |
7a06e586 SO |
963 | nfc_llcp_parse_connection_tlv(new_sock, &skb->data[LLCP_HEADER_SIZE], |
964 | skb->len - LLCP_HEADER_SIZE); | |
965 | ||
d646960f SO |
966 | pr_debug("new sock %p sk %p\n", new_sock, &new_sock->sk); |
967 | ||
a69f32af | 968 | nfc_llcp_sock_link(&local->sockets, new_sk); |
d646960f SO |
969 | |
970 | nfc_llcp_accept_enqueue(&sock->sk, new_sk); | |
971 | ||
972 | nfc_get_device(local->dev->idx); | |
973 | ||
974 | new_sk->sk_state = LLCP_CONNECTED; | |
975 | ||
976 | /* Wake the listening processes */ | |
977 | parent->sk_data_ready(parent, 0); | |
978 | ||
979 | /* Send CC */ | |
980 | nfc_llcp_send_cc(new_sock); | |
981 | ||
982 | release_sock(&sock->sk); | |
983 | sock_put(&sock->sk); | |
984 | ||
985 | return; | |
986 | ||
987 | fail: | |
988 | /* Send DM */ | |
989 | nfc_llcp_send_dm(local, dsap, ssap, reason); | |
d646960f SO |
990 | } |
991 | ||
d094afa1 | 992 | int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock) |
4722d2b7 | 993 | { |
d094afa1 | 994 | int nr_frames = 0; |
4722d2b7 SO |
995 | struct nfc_llcp_local *local = sock->local; |
996 | ||
997 | pr_debug("Remote ready %d tx queue len %d remote rw %d", | |
427a2eb1 | 998 | sock->remote_ready, skb_queue_len(&sock->tx_pending_queue), |
e4306bec | 999 | sock->remote_rw); |
4722d2b7 SO |
1000 | |
1001 | /* Try to queue some I frames for transmission */ | |
1002 | while (sock->remote_ready && | |
e4306bec | 1003 | skb_queue_len(&sock->tx_pending_queue) < sock->remote_rw) { |
84457960 | 1004 | struct sk_buff *pdu; |
4722d2b7 SO |
1005 | |
1006 | pdu = skb_dequeue(&sock->tx_queue); | |
1007 | if (pdu == NULL) | |
1008 | break; | |
1009 | ||
1010 | /* Update N(S)/N(R) */ | |
1011 | nfc_llcp_set_nrns(sock, pdu); | |
1012 | ||
4722d2b7 | 1013 | skb_queue_tail(&local->tx_queue, pdu); |
d094afa1 | 1014 | nr_frames++; |
4722d2b7 | 1015 | } |
d094afa1 SO |
1016 | |
1017 | return nr_frames; | |
4722d2b7 SO |
1018 | } |
1019 | ||
d646960f | 1020 | static void nfc_llcp_recv_hdlc(struct nfc_llcp_local *local, |
427a2eb1 | 1021 | struct sk_buff *skb) |
d646960f SO |
1022 | { |
1023 | struct nfc_llcp_sock *llcp_sock; | |
1024 | struct sock *sk; | |
1025 | u8 dsap, ssap, ptype, ns, nr; | |
1026 | ||
1027 | ptype = nfc_llcp_ptype(skb); | |
1028 | dsap = nfc_llcp_dsap(skb); | |
1029 | ssap = nfc_llcp_ssap(skb); | |
1030 | ns = nfc_llcp_ns(skb); | |
1031 | nr = nfc_llcp_nr(skb); | |
1032 | ||
1033 | pr_debug("%d %d R %d S %d\n", dsap, ssap, nr, ns); | |
1034 | ||
1035 | llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); | |
1036 | if (llcp_sock == NULL) { | |
1037 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); | |
1038 | return; | |
1039 | } | |
1040 | ||
1041 | sk = &llcp_sock->sk; | |
1042 | lock_sock(sk); | |
1043 | if (sk->sk_state == LLCP_CLOSED) { | |
1044 | release_sock(sk); | |
1045 | nfc_llcp_sock_put(llcp_sock); | |
1046 | } | |
1047 | ||
d646960f SO |
1048 | /* Pass the payload upstream */ |
1049 | if (ptype == LLCP_PDU_I) { | |
1050 | pr_debug("I frame, queueing on %p\n", &llcp_sock->sk); | |
1051 | ||
53aef920 SO |
1052 | if (ns == llcp_sock->recv_n) |
1053 | llcp_sock->recv_n = (llcp_sock->recv_n + 1) % 16; | |
1054 | else | |
1055 | pr_err("Received out of sequence I PDU\n"); | |
1056 | ||
d646960f | 1057 | skb_pull(skb, LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE); |
1727cf93 SO |
1058 | if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) { |
1059 | /* | |
1060 | * I frames will be freed from the socket layer, so we | |
1061 | * need to keep them alive until someone receives them. | |
1062 | */ | |
1063 | skb_get(skb); | |
1064 | } else { | |
1065 | pr_err("Receive queue is full\n"); | |
d646960f SO |
1066 | } |
1067 | } | |
1068 | ||
1069 | /* Remove skbs from the pending queue */ | |
1070 | if (llcp_sock->send_ack_n != nr) { | |
1071 | struct sk_buff *s, *tmp; | |
28981491 | 1072 | u8 n; |
d646960f SO |
1073 | |
1074 | llcp_sock->send_ack_n = nr; | |
1075 | ||
84457960 SO |
1076 | /* Remove and free all skbs until ns == nr */ |
1077 | skb_queue_walk_safe(&llcp_sock->tx_pending_queue, s, tmp) { | |
28981491 WR |
1078 | n = nfc_llcp_ns(s); |
1079 | ||
84457960 SO |
1080 | skb_unlink(s, &llcp_sock->tx_pending_queue); |
1081 | kfree_skb(s); | |
1082 | ||
28981491 | 1083 | if (n == nr) |
84457960 SO |
1084 | break; |
1085 | } | |
1086 | ||
1087 | /* Re-queue the remaining skbs for transmission */ | |
1088 | skb_queue_reverse_walk_safe(&llcp_sock->tx_pending_queue, | |
1089 | s, tmp) { | |
1090 | skb_unlink(s, &llcp_sock->tx_pending_queue); | |
1091 | skb_queue_head(&local->tx_queue, s); | |
1092 | } | |
d646960f SO |
1093 | } |
1094 | ||
53aef920 SO |
1095 | if (ptype == LLCP_PDU_RR) |
1096 | llcp_sock->remote_ready = true; | |
427a2eb1 | 1097 | else if (ptype == LLCP_PDU_RNR) |
53aef920 SO |
1098 | llcp_sock->remote_ready = false; |
1099 | ||
56af2568 | 1100 | if (nfc_llcp_queue_i_frames(llcp_sock) == 0 && ptype == LLCP_PDU_I) |
d094afa1 | 1101 | nfc_llcp_send_rr(llcp_sock); |
d646960f SO |
1102 | |
1103 | release_sock(sk); | |
1104 | nfc_llcp_sock_put(llcp_sock); | |
1105 | } | |
1106 | ||
1107 | static void nfc_llcp_recv_disc(struct nfc_llcp_local *local, | |
427a2eb1 | 1108 | struct sk_buff *skb) |
d646960f SO |
1109 | { |
1110 | struct nfc_llcp_sock *llcp_sock; | |
1111 | struct sock *sk; | |
1112 | u8 dsap, ssap; | |
1113 | ||
1114 | dsap = nfc_llcp_dsap(skb); | |
1115 | ssap = nfc_llcp_ssap(skb); | |
1116 | ||
6d2cd978 SO |
1117 | if ((dsap == 0) && (ssap == 0)) { |
1118 | pr_debug("Connection termination"); | |
1119 | nfc_dep_link_down(local->dev); | |
1120 | return; | |
1121 | } | |
1122 | ||
d646960f SO |
1123 | llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); |
1124 | if (llcp_sock == NULL) { | |
1125 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); | |
1126 | return; | |
1127 | } | |
1128 | ||
1129 | sk = &llcp_sock->sk; | |
1130 | lock_sock(sk); | |
f31652a5 SO |
1131 | |
1132 | nfc_llcp_socket_purge(llcp_sock); | |
1133 | ||
d646960f SO |
1134 | if (sk->sk_state == LLCP_CLOSED) { |
1135 | release_sock(sk); | |
1136 | nfc_llcp_sock_put(llcp_sock); | |
1137 | } | |
1138 | ||
d646960f SO |
1139 | if (sk->sk_state == LLCP_CONNECTED) { |
1140 | nfc_put_device(local->dev); | |
1141 | sk->sk_state = LLCP_CLOSED; | |
1142 | sk->sk_state_change(sk); | |
1143 | } | |
1144 | ||
1145 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_DISC); | |
1146 | ||
1147 | release_sock(sk); | |
1148 | nfc_llcp_sock_put(llcp_sock); | |
1149 | } | |
1150 | ||
427a2eb1 | 1151 | static void nfc_llcp_recv_cc(struct nfc_llcp_local *local, struct sk_buff *skb) |
d646960f SO |
1152 | { |
1153 | struct nfc_llcp_sock *llcp_sock; | |
ff353d86 | 1154 | struct sock *sk; |
d646960f SO |
1155 | u8 dsap, ssap; |
1156 | ||
d646960f SO |
1157 | dsap = nfc_llcp_dsap(skb); |
1158 | ssap = nfc_llcp_ssap(skb); | |
1159 | ||
a69f32af | 1160 | llcp_sock = nfc_llcp_connecting_sock_get(local, dsap); |
d646960f SO |
1161 | if (llcp_sock == NULL) { |
1162 | pr_err("Invalid CC\n"); | |
1163 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); | |
1164 | ||
1165 | return; | |
1166 | } | |
1167 | ||
ff353d86 | 1168 | sk = &llcp_sock->sk; |
d646960f | 1169 | |
a69f32af SO |
1170 | /* Unlink from connecting and link to the client array */ |
1171 | nfc_llcp_sock_unlink(&local->connecting_sockets, sk); | |
1172 | nfc_llcp_sock_link(&local->sockets, sk); | |
1173 | llcp_sock->dsap = ssap; | |
1174 | ||
7a06e586 SO |
1175 | nfc_llcp_parse_connection_tlv(llcp_sock, &skb->data[LLCP_HEADER_SIZE], |
1176 | skb->len - LLCP_HEADER_SIZE); | |
d646960f | 1177 | |
ff353d86 SO |
1178 | sk->sk_state = LLCP_CONNECTED; |
1179 | sk->sk_state_change(sk); | |
1180 | ||
d646960f SO |
1181 | nfc_llcp_sock_put(llcp_sock); |
1182 | } | |
1183 | ||
5c0560b7 SO |
1184 | static void nfc_llcp_recv_dm(struct nfc_llcp_local *local, struct sk_buff *skb) |
1185 | { | |
1186 | struct nfc_llcp_sock *llcp_sock; | |
1187 | struct sock *sk; | |
1188 | u8 dsap, ssap, reason; | |
1189 | ||
1190 | dsap = nfc_llcp_dsap(skb); | |
1191 | ssap = nfc_llcp_ssap(skb); | |
1192 | reason = skb->data[2]; | |
1193 | ||
1194 | pr_debug("%d %d reason %d\n", ssap, dsap, reason); | |
1195 | ||
1196 | switch (reason) { | |
1197 | case LLCP_DM_NOBOUND: | |
1198 | case LLCP_DM_REJ: | |
1199 | llcp_sock = nfc_llcp_connecting_sock_get(local, dsap); | |
1200 | break; | |
1201 | ||
1202 | default: | |
1203 | llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); | |
1204 | break; | |
1205 | } | |
1206 | ||
1207 | if (llcp_sock == NULL) { | |
a8df0f37 | 1208 | pr_debug("Already closed\n"); |
5c0560b7 SO |
1209 | return; |
1210 | } | |
1211 | ||
1212 | sk = &llcp_sock->sk; | |
1213 | ||
1214 | sk->sk_err = ENXIO; | |
1215 | sk->sk_state = LLCP_CLOSED; | |
1216 | sk->sk_state_change(sk); | |
1217 | ||
1218 | nfc_llcp_sock_put(llcp_sock); | |
5c0560b7 SO |
1219 | } |
1220 | ||
19cfe584 SO |
1221 | static void nfc_llcp_recv_snl(struct nfc_llcp_local *local, |
1222 | struct sk_buff *skb) | |
1223 | { | |
1224 | struct nfc_llcp_sock *llcp_sock; | |
1225 | u8 dsap, ssap, *tlv, type, length, tid, sap; | |
1226 | u16 tlv_len, offset; | |
1227 | char *service_name; | |
1228 | size_t service_name_len; | |
e0ae7bac TE |
1229 | struct nfc_llcp_sdp_tlv *sdp; |
1230 | HLIST_HEAD(llc_sdres_list); | |
1231 | size_t sdres_tlvs_len; | |
d9b8d8e1 | 1232 | HLIST_HEAD(nl_sdres_list); |
19cfe584 SO |
1233 | |
1234 | dsap = nfc_llcp_dsap(skb); | |
1235 | ssap = nfc_llcp_ssap(skb); | |
1236 | ||
1237 | pr_debug("%d %d\n", dsap, ssap); | |
1238 | ||
1239 | if (dsap != LLCP_SAP_SDP || ssap != LLCP_SAP_SDP) { | |
1240 | pr_err("Wrong SNL SAP\n"); | |
1241 | return; | |
1242 | } | |
1243 | ||
1244 | tlv = &skb->data[LLCP_HEADER_SIZE]; | |
1245 | tlv_len = skb->len - LLCP_HEADER_SIZE; | |
1246 | offset = 0; | |
e0ae7bac | 1247 | sdres_tlvs_len = 0; |
19cfe584 | 1248 | |
0f450772 | 1249 | while (offset < tlv_len) { |
19cfe584 SO |
1250 | type = tlv[0]; |
1251 | length = tlv[1]; | |
1252 | ||
1253 | switch (type) { | |
1254 | case LLCP_TLV_SDREQ: | |
1255 | tid = tlv[2]; | |
1256 | service_name = (char *) &tlv[3]; | |
1257 | service_name_len = length - 1; | |
1258 | ||
e6904081 | 1259 | pr_debug("Looking for %.16s\n", service_name); |
19cfe584 SO |
1260 | |
1261 | if (service_name_len == strlen("urn:nfc:sn:sdp") && | |
1262 | !strncmp(service_name, "urn:nfc:sn:sdp", | |
1263 | service_name_len)) { | |
1264 | sap = 1; | |
e0ae7bac | 1265 | goto add_snl; |
e6904081 SO |
1266 | } |
1267 | ||
1268 | llcp_sock = nfc_llcp_sock_from_sn(local, service_name, | |
1269 | service_name_len); | |
1270 | if (!llcp_sock) { | |
1271 | sap = 0; | |
e0ae7bac | 1272 | goto add_snl; |
e6904081 SO |
1273 | } |
1274 | ||
1275 | /* | |
1276 | * We found a socket but its ssap has not been reserved | |
1277 | * yet. We need to assign it for good and send a reply. | |
1278 | * The ssap will be freed when the socket is closed. | |
1279 | */ | |
1280 | if (llcp_sock->ssap == LLCP_SDP_UNBOUND) { | |
1281 | atomic_t *client_count; | |
1282 | ||
1283 | sap = nfc_llcp_reserve_sdp_ssap(local); | |
1284 | ||
1285 | pr_debug("Reserving %d\n", sap); | |
1286 | ||
1287 | if (sap == LLCP_SAP_MAX) { | |
1288 | sap = 0; | |
e0ae7bac | 1289 | goto add_snl; |
e6904081 SO |
1290 | } |
1291 | ||
1292 | client_count = | |
1293 | &local->local_sdp_cnt[sap - | |
1294 | LLCP_WKS_NUM_SAP]; | |
1295 | ||
1296 | atomic_inc(client_count); | |
1297 | ||
1298 | llcp_sock->ssap = sap; | |
1299 | llcp_sock->reserved_ssap = sap; | |
19cfe584 | 1300 | } else { |
e6904081 | 1301 | sap = llcp_sock->ssap; |
19cfe584 SO |
1302 | } |
1303 | ||
e6904081 SO |
1304 | pr_debug("%p %d\n", llcp_sock, sap); |
1305 | ||
e0ae7bac TE |
1306 | add_snl: |
1307 | sdp = nfc_llcp_build_sdres_tlv(tid, sap); | |
1308 | if (sdp == NULL) | |
1309 | goto exit; | |
1310 | ||
1311 | sdres_tlvs_len += sdp->tlv_len; | |
1312 | hlist_add_head(&sdp->node, &llc_sdres_list); | |
19cfe584 SO |
1313 | break; |
1314 | ||
d9b8d8e1 TE |
1315 | case LLCP_TLV_SDRES: |
1316 | mutex_lock(&local->sdreq_lock); | |
1317 | ||
1318 | pr_debug("LLCP_TLV_SDRES: searching tid %d\n", tlv[2]); | |
1319 | ||
1320 | hlist_for_each_entry(sdp, &local->pending_sdreqs, node) { | |
1321 | if (sdp->tid != tlv[2]) | |
1322 | continue; | |
1323 | ||
1324 | sdp->sap = tlv[3]; | |
1325 | ||
1326 | pr_debug("Found: uri=%s, sap=%d\n", | |
1327 | sdp->uri, sdp->sap); | |
1328 | ||
1329 | hlist_del(&sdp->node); | |
1330 | ||
1331 | hlist_add_head(&sdp->node, &nl_sdres_list); | |
1332 | ||
1333 | break; | |
1334 | } | |
1335 | ||
1336 | mutex_unlock(&local->sdreq_lock); | |
1337 | break; | |
1338 | ||
19cfe584 SO |
1339 | default: |
1340 | pr_err("Invalid SNL tlv value 0x%x\n", type); | |
1341 | break; | |
1342 | } | |
1343 | ||
1344 | offset += length + 2; | |
1345 | tlv += length + 2; | |
1346 | } | |
e0ae7bac TE |
1347 | |
1348 | exit: | |
d9b8d8e1 TE |
1349 | if (!hlist_empty(&nl_sdres_list)) |
1350 | nfc_genl_llc_send_sdres(local->dev, &nl_sdres_list); | |
1351 | ||
e0ae7bac TE |
1352 | if (!hlist_empty(&llc_sdres_list)) |
1353 | nfc_llcp_send_snl_sdres(local, &llc_sdres_list, sdres_tlvs_len); | |
19cfe584 SO |
1354 | } |
1355 | ||
098dafcf | 1356 | static void nfc_llcp_recv_agf(struct nfc_llcp_local *local, struct sk_buff *skb) |
d646960f | 1357 | { |
098dafcf TE |
1358 | u8 ptype; |
1359 | u16 pdu_len; | |
1360 | struct sk_buff *new_skb; | |
d646960f | 1361 | |
098dafcf TE |
1362 | if (skb->len <= LLCP_HEADER_SIZE) { |
1363 | pr_err("Malformed AGF PDU\n"); | |
d646960f SO |
1364 | return; |
1365 | } | |
1366 | ||
098dafcf TE |
1367 | skb_pull(skb, LLCP_HEADER_SIZE); |
1368 | ||
1369 | while (skb->len > LLCP_AGF_PDU_HEADER_SIZE) { | |
1370 | pdu_len = skb->data[0] << 8 | skb->data[1]; | |
1371 | ||
1372 | skb_pull(skb, LLCP_AGF_PDU_HEADER_SIZE); | |
1373 | ||
1374 | if (pdu_len < LLCP_HEADER_SIZE || pdu_len > skb->len) { | |
1375 | pr_err("Malformed AGF PDU\n"); | |
1376 | return; | |
1377 | } | |
1378 | ||
1379 | ptype = nfc_llcp_ptype(skb); | |
1380 | ||
1381 | if (ptype == LLCP_PDU_SYMM || ptype == LLCP_PDU_AGF) | |
1382 | goto next; | |
1383 | ||
1384 | new_skb = nfc_alloc_recv_skb(pdu_len, GFP_KERNEL); | |
1385 | if (new_skb == NULL) { | |
1386 | pr_err("Could not allocate PDU\n"); | |
1387 | return; | |
1388 | } | |
1389 | ||
1390 | memcpy(skb_put(new_skb, pdu_len), skb->data, pdu_len); | |
1391 | ||
1392 | nfc_llcp_rx_skb(local, new_skb); | |
1393 | ||
1394 | kfree_skb(new_skb); | |
1395 | next: | |
1396 | skb_pull(skb, pdu_len); | |
1397 | } | |
1398 | } | |
1399 | ||
1400 | static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb) | |
1401 | { | |
1402 | u8 dsap, ssap, ptype; | |
1403 | ||
d646960f SO |
1404 | ptype = nfc_llcp_ptype(skb); |
1405 | dsap = nfc_llcp_dsap(skb); | |
1406 | ssap = nfc_llcp_ssap(skb); | |
1407 | ||
1408 | pr_debug("ptype 0x%x dsap 0x%x ssap 0x%x\n", ptype, dsap, ssap); | |
1409 | ||
4be646ec SO |
1410 | if (ptype != LLCP_PDU_SYMM) |
1411 | print_hex_dump(KERN_DEBUG, "LLCP Rx: ", DUMP_PREFIX_OFFSET, | |
1412 | 16, 1, skb->data, skb->len, true); | |
1413 | ||
d646960f SO |
1414 | switch (ptype) { |
1415 | case LLCP_PDU_SYMM: | |
1416 | pr_debug("SYMM\n"); | |
1417 | break; | |
1418 | ||
968272bf SO |
1419 | case LLCP_PDU_UI: |
1420 | pr_debug("UI\n"); | |
1421 | nfc_llcp_recv_ui(local, skb); | |
1422 | break; | |
1423 | ||
d646960f SO |
1424 | case LLCP_PDU_CONNECT: |
1425 | pr_debug("CONNECT\n"); | |
1426 | nfc_llcp_recv_connect(local, skb); | |
1427 | break; | |
1428 | ||
1429 | case LLCP_PDU_DISC: | |
1430 | pr_debug("DISC\n"); | |
1431 | nfc_llcp_recv_disc(local, skb); | |
1432 | break; | |
1433 | ||
1434 | case LLCP_PDU_CC: | |
1435 | pr_debug("CC\n"); | |
1436 | nfc_llcp_recv_cc(local, skb); | |
1437 | break; | |
1438 | ||
5c0560b7 SO |
1439 | case LLCP_PDU_DM: |
1440 | pr_debug("DM\n"); | |
1441 | nfc_llcp_recv_dm(local, skb); | |
1442 | break; | |
1443 | ||
19cfe584 SO |
1444 | case LLCP_PDU_SNL: |
1445 | pr_debug("SNL\n"); | |
1446 | nfc_llcp_recv_snl(local, skb); | |
1447 | break; | |
1448 | ||
d646960f SO |
1449 | case LLCP_PDU_I: |
1450 | case LLCP_PDU_RR: | |
53aef920 | 1451 | case LLCP_PDU_RNR: |
d646960f SO |
1452 | pr_debug("I frame\n"); |
1453 | nfc_llcp_recv_hdlc(local, skb); | |
1454 | break; | |
1455 | ||
098dafcf TE |
1456 | case LLCP_PDU_AGF: |
1457 | pr_debug("AGF frame\n"); | |
1458 | nfc_llcp_recv_agf(local, skb); | |
1459 | break; | |
d646960f | 1460 | } |
098dafcf TE |
1461 | } |
1462 | ||
1463 | static void nfc_llcp_rx_work(struct work_struct *work) | |
1464 | { | |
1465 | struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, | |
1466 | rx_work); | |
1467 | struct sk_buff *skb; | |
1468 | ||
1469 | skb = local->rx_pending; | |
1470 | if (skb == NULL) { | |
1471 | pr_debug("No pending SKB\n"); | |
1472 | return; | |
1473 | } | |
1474 | ||
1475 | __net_timestamp(skb); | |
1476 | ||
1477 | nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_RX); | |
1478 | ||
1479 | nfc_llcp_rx_skb(local, skb); | |
d646960f | 1480 | |
916082b0 | 1481 | schedule_work(&local->tx_work); |
d646960f SO |
1482 | kfree_skb(local->rx_pending); |
1483 | local->rx_pending = NULL; | |
d646960f SO |
1484 | } |
1485 | ||
1727cf93 SO |
1486 | static void __nfc_llcp_recv(struct nfc_llcp_local *local, struct sk_buff *skb) |
1487 | { | |
1488 | local->rx_pending = skb; | |
1489 | del_timer(&local->link_timer); | |
1490 | schedule_work(&local->rx_work); | |
1491 | } | |
1492 | ||
d646960f SO |
1493 | void nfc_llcp_recv(void *data, struct sk_buff *skb, int err) |
1494 | { | |
1495 | struct nfc_llcp_local *local = (struct nfc_llcp_local *) data; | |
1496 | ||
1497 | pr_debug("Received an LLCP PDU\n"); | |
1498 | if (err < 0) { | |
427a2eb1 | 1499 | pr_err("err %d\n", err); |
d646960f SO |
1500 | return; |
1501 | } | |
1502 | ||
1727cf93 | 1503 | __nfc_llcp_recv(local, skb); |
d646960f SO |
1504 | } |
1505 | ||
73167ced SO |
1506 | int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb) |
1507 | { | |
1508 | struct nfc_llcp_local *local; | |
1509 | ||
1510 | local = nfc_llcp_find_local(dev); | |
1511 | if (local == NULL) | |
1512 | return -ENODEV; | |
1513 | ||
1727cf93 | 1514 | __nfc_llcp_recv(local, skb); |
73167ced SO |
1515 | |
1516 | return 0; | |
1517 | } | |
1518 | ||
d646960f SO |
1519 | void nfc_llcp_mac_is_down(struct nfc_dev *dev) |
1520 | { | |
1521 | struct nfc_llcp_local *local; | |
1522 | ||
1523 | local = nfc_llcp_find_local(dev); | |
1524 | if (local == NULL) | |
1525 | return; | |
1526 | ||
abd18d43 TE |
1527 | local->remote_miu = LLCP_DEFAULT_MIU; |
1528 | local->remote_lto = LLCP_DEFAULT_LTO; | |
1529 | ||
d646960f | 1530 | /* Close and purge all existing sockets */ |
3bbc0ceb | 1531 | nfc_llcp_socket_release(local, true, 0); |
d646960f SO |
1532 | } |
1533 | ||
1534 | void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx, | |
1535 | u8 comm_mode, u8 rf_mode) | |
1536 | { | |
1537 | struct nfc_llcp_local *local; | |
1538 | ||
1539 | pr_debug("rf mode %d\n", rf_mode); | |
1540 | ||
1541 | local = nfc_llcp_find_local(dev); | |
1542 | if (local == NULL) | |
1543 | return; | |
1544 | ||
1545 | local->target_idx = target_idx; | |
1546 | local->comm_mode = comm_mode; | |
1547 | local->rf_mode = rf_mode; | |
1548 | ||
1549 | if (rf_mode == NFC_RF_INITIATOR) { | |
1550 | pr_debug("Queueing Tx work\n"); | |
1551 | ||
916082b0 | 1552 | schedule_work(&local->tx_work); |
d646960f SO |
1553 | } else { |
1554 | mod_timer(&local->link_timer, | |
427a2eb1 | 1555 | jiffies + msecs_to_jiffies(local->remote_lto)); |
d646960f SO |
1556 | } |
1557 | } | |
1558 | ||
1559 | int nfc_llcp_register_device(struct nfc_dev *ndev) | |
1560 | { | |
d646960f | 1561 | struct nfc_llcp_local *local; |
d646960f SO |
1562 | |
1563 | local = kzalloc(sizeof(struct nfc_llcp_local), GFP_KERNEL); | |
1564 | if (local == NULL) | |
1565 | return -ENOMEM; | |
1566 | ||
1567 | local->dev = ndev; | |
1568 | INIT_LIST_HEAD(&local->list); | |
c7aa1225 | 1569 | kref_init(&local->ref); |
d646960f | 1570 | mutex_init(&local->sdp_lock); |
d646960f SO |
1571 | init_timer(&local->link_timer); |
1572 | local->link_timer.data = (unsigned long) local; | |
1573 | local->link_timer.function = nfc_llcp_symm_timer; | |
1574 | ||
1575 | skb_queue_head_init(&local->tx_queue); | |
1576 | INIT_WORK(&local->tx_work, nfc_llcp_tx_work); | |
d646960f SO |
1577 | |
1578 | local->rx_pending = NULL; | |
1579 | INIT_WORK(&local->rx_work, nfc_llcp_rx_work); | |
d646960f SO |
1580 | |
1581 | INIT_WORK(&local->timeout_work, nfc_llcp_timeout_work); | |
d646960f | 1582 | |
fe235b58 SJ |
1583 | rwlock_init(&local->sockets.lock); |
1584 | rwlock_init(&local->connecting_sockets.lock); | |
4463523b | 1585 | rwlock_init(&local->raw_sockets.lock); |
a69f32af | 1586 | |
52feb444 TE |
1587 | local->lto = 150; /* 1500 ms */ |
1588 | local->rw = LLCP_MAX_RW; | |
1589 | local->miux = cpu_to_be16(LLCP_MAX_MIUX); | |
1590 | ||
d646960f SO |
1591 | nfc_llcp_build_gb(local); |
1592 | ||
1593 | local->remote_miu = LLCP_DEFAULT_MIU; | |
1594 | local->remote_lto = LLCP_DEFAULT_LTO; | |
d646960f | 1595 | |
d9b8d8e1 TE |
1596 | mutex_init(&local->sdreq_lock); |
1597 | INIT_HLIST_HEAD(&local->pending_sdreqs); | |
40213fa8 TE |
1598 | init_timer(&local->sdreq_timer); |
1599 | local->sdreq_timer.data = (unsigned long) local; | |
1600 | local->sdreq_timer.function = nfc_llcp_sdreq_timer; | |
1601 | INIT_WORK(&local->sdreq_timeout_work, nfc_llcp_sdreq_timeout_work); | |
d9b8d8e1 | 1602 | |
16a78e9f | 1603 | list_add(&local->list, &llcp_devices); |
d646960f | 1604 | |
d646960f SO |
1605 | return 0; |
1606 | } | |
1607 | ||
1608 | void nfc_llcp_unregister_device(struct nfc_dev *dev) | |
1609 | { | |
1610 | struct nfc_llcp_local *local = nfc_llcp_find_local(dev); | |
1611 | ||
1612 | if (local == NULL) { | |
1613 | pr_debug("No such device\n"); | |
1614 | return; | |
1615 | } | |
1616 | ||
c470e319 | 1617 | local_cleanup(local); |
3536da06 | 1618 | |
c7aa1225 | 1619 | nfc_llcp_local_put(local); |
d646960f SO |
1620 | } |
1621 | ||
1622 | int __init nfc_llcp_init(void) | |
1623 | { | |
1624 | INIT_LIST_HEAD(&llcp_devices); | |
1625 | ||
1626 | return nfc_llcp_sock_init(); | |
1627 | } | |
1628 | ||
1629 | void nfc_llcp_exit(void) | |
1630 | { | |
1631 | nfc_llcp_sock_exit(); | |
1632 | } |