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 | ||
27 | #include "../nfc.h" | |
28 | #include "llcp.h" | |
29 | ||
30 | static u8 llcp_magic[3] = {0x46, 0x66, 0x6d}; | |
31 | ||
32 | static struct list_head llcp_devices; | |
33 | ||
a69f32af | 34 | void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *sk) |
d646960f | 35 | { |
a69f32af SO |
36 | write_lock(&l->lock); |
37 | sk_add_node(sk, &l->head); | |
38 | write_unlock(&l->lock); | |
39 | } | |
d646960f | 40 | |
a69f32af SO |
41 | void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *sk) |
42 | { | |
43 | write_lock(&l->lock); | |
44 | sk_del_node_init(sk); | |
45 | write_unlock(&l->lock); | |
46 | } | |
d646960f | 47 | |
4d22ea15 | 48 | static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen) |
a69f32af SO |
49 | { |
50 | struct sock *sk; | |
51 | struct hlist_node *node, *tmp; | |
52 | struct nfc_llcp_sock *llcp_sock; | |
d646960f | 53 | |
a69f32af | 54 | write_lock(&local->sockets.lock); |
40c75f81 | 55 | |
a69f32af SO |
56 | sk_for_each_safe(sk, node, tmp, &local->sockets.head) { |
57 | llcp_sock = nfc_llcp_sock(sk); | |
d646960f | 58 | |
a69f32af | 59 | lock_sock(sk); |
d646960f | 60 | |
a69f32af SO |
61 | if (sk->sk_state == LLCP_CONNECTED) |
62 | nfc_put_device(llcp_sock->dev); | |
d646960f | 63 | |
a69f32af | 64 | if (sk->sk_state == LLCP_LISTEN) { |
d646960f SO |
65 | struct nfc_llcp_sock *lsk, *n; |
66 | struct sock *accept_sk; | |
67 | ||
a69f32af | 68 | list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue, |
427a2eb1 | 69 | accept_queue) { |
d646960f SO |
70 | accept_sk = &lsk->sk; |
71 | lock_sock(accept_sk); | |
72 | ||
73 | nfc_llcp_accept_unlink(accept_sk); | |
74 | ||
75 | accept_sk->sk_state = LLCP_CLOSED; | |
d646960f SO |
76 | |
77 | release_sock(accept_sk); | |
78 | ||
79 | sock_orphan(accept_sk); | |
80 | } | |
4d22ea15 SO |
81 | |
82 | if (listen == true) { | |
83 | release_sock(sk); | |
84 | continue; | |
85 | } | |
d646960f SO |
86 | } |
87 | ||
a69f32af | 88 | sk->sk_state = LLCP_CLOSED; |
d646960f | 89 | |
a69f32af | 90 | release_sock(sk); |
d646960f | 91 | |
a69f32af | 92 | sock_orphan(sk); |
40c75f81 | 93 | |
a69f32af | 94 | sk_del_node_init(sk); |
d646960f SO |
95 | } |
96 | ||
a69f32af | 97 | write_unlock(&local->sockets.lock); |
d646960f SO |
98 | } |
99 | ||
c7aa1225 SO |
100 | struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local) |
101 | { | |
102 | kref_get(&local->ref); | |
103 | ||
104 | return local; | |
105 | } | |
106 | ||
107 | static void local_release(struct kref *ref) | |
108 | { | |
109 | struct nfc_llcp_local *local; | |
110 | ||
111 | local = container_of(ref, struct nfc_llcp_local, ref); | |
112 | ||
113 | list_del(&local->list); | |
4d22ea15 | 114 | nfc_llcp_socket_release(local, false); |
c7aa1225 SO |
115 | del_timer_sync(&local->link_timer); |
116 | skb_queue_purge(&local->tx_queue); | |
474fee3d TH |
117 | cancel_work_sync(&local->tx_work); |
118 | cancel_work_sync(&local->rx_work); | |
119 | cancel_work_sync(&local->timeout_work); | |
c7aa1225 SO |
120 | kfree_skb(local->rx_pending); |
121 | kfree(local); | |
122 | } | |
123 | ||
124 | int nfc_llcp_local_put(struct nfc_llcp_local *local) | |
125 | { | |
a69f32af SO |
126 | if (local == NULL) |
127 | return 0; | |
128 | ||
c7aa1225 SO |
129 | return kref_put(&local->ref, local_release); |
130 | } | |
131 | ||
8f50020e SO |
132 | static struct nfc_llcp_sock *nfc_llcp_sock_get(struct nfc_llcp_local *local, |
133 | u8 ssap, u8 dsap) | |
134 | { | |
135 | struct sock *sk; | |
136 | struct hlist_node *node; | |
137 | struct nfc_llcp_sock *llcp_sock; | |
138 | ||
139 | pr_debug("ssap dsap %d %d\n", ssap, dsap); | |
140 | ||
141 | if (ssap == 0 && dsap == 0) | |
142 | return NULL; | |
143 | ||
144 | read_lock(&local->sockets.lock); | |
145 | ||
146 | llcp_sock = NULL; | |
147 | ||
148 | sk_for_each(sk, node, &local->sockets.head) { | |
149 | llcp_sock = nfc_llcp_sock(sk); | |
150 | ||
151 | if (llcp_sock->ssap == ssap && llcp_sock->dsap == dsap) | |
152 | break; | |
153 | } | |
154 | ||
155 | read_unlock(&local->sockets.lock); | |
156 | ||
157 | if (llcp_sock == NULL) | |
158 | return NULL; | |
159 | ||
160 | sock_hold(&llcp_sock->sk); | |
161 | ||
162 | return llcp_sock; | |
163 | } | |
164 | ||
165 | static void nfc_llcp_sock_put(struct nfc_llcp_sock *sock) | |
166 | { | |
167 | sock_put(&sock->sk); | |
168 | } | |
169 | ||
d646960f SO |
170 | static void nfc_llcp_timeout_work(struct work_struct *work) |
171 | { | |
172 | struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, | |
427a2eb1 | 173 | timeout_work); |
d646960f SO |
174 | |
175 | nfc_dep_link_down(local->dev); | |
176 | } | |
177 | ||
178 | static void nfc_llcp_symm_timer(unsigned long data) | |
179 | { | |
180 | struct nfc_llcp_local *local = (struct nfc_llcp_local *) data; | |
181 | ||
182 | pr_err("SYMM timeout\n"); | |
183 | ||
474fee3d | 184 | queue_work(system_nrt_wq, &local->timeout_work); |
d646960f SO |
185 | } |
186 | ||
187 | struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev) | |
188 | { | |
189 | struct nfc_llcp_local *local, *n; | |
190 | ||
191 | list_for_each_entry_safe(local, n, &llcp_devices, list) | |
192 | if (local->dev == dev) | |
193 | return local; | |
194 | ||
195 | pr_debug("No device found\n"); | |
196 | ||
197 | return NULL; | |
198 | } | |
199 | ||
200 | static char *wks[] = { | |
201 | NULL, | |
202 | NULL, /* SDP */ | |
203 | "urn:nfc:sn:ip", | |
204 | "urn:nfc:sn:obex", | |
205 | "urn:nfc:sn:snep", | |
206 | }; | |
207 | ||
208 | static int nfc_llcp_wks_sap(char *service_name, size_t service_name_len) | |
209 | { | |
210 | int sap, num_wks; | |
211 | ||
212 | pr_debug("%s\n", service_name); | |
213 | ||
214 | if (service_name == NULL) | |
215 | return -EINVAL; | |
216 | ||
217 | num_wks = ARRAY_SIZE(wks); | |
218 | ||
427a2eb1 | 219 | for (sap = 0; sap < num_wks; sap++) { |
d646960f SO |
220 | if (wks[sap] == NULL) |
221 | continue; | |
222 | ||
223 | if (strncmp(wks[sap], service_name, service_name_len) == 0) | |
224 | return sap; | |
225 | } | |
226 | ||
227 | return -EINVAL; | |
228 | } | |
229 | ||
8f50020e SO |
230 | static |
231 | struct nfc_llcp_sock *nfc_llcp_sock_from_sn(struct nfc_llcp_local *local, | |
232 | u8 *sn, size_t sn_len) | |
233 | { | |
234 | struct sock *sk; | |
235 | struct hlist_node *node; | |
236 | struct nfc_llcp_sock *llcp_sock, *tmp_sock; | |
237 | ||
238 | pr_debug("sn %zd %p\n", sn_len, sn); | |
239 | ||
240 | if (sn == NULL || sn_len == 0) | |
241 | return NULL; | |
242 | ||
243 | read_lock(&local->sockets.lock); | |
244 | ||
245 | llcp_sock = NULL; | |
246 | ||
247 | sk_for_each(sk, node, &local->sockets.head) { | |
248 | tmp_sock = nfc_llcp_sock(sk); | |
249 | ||
250 | pr_debug("llcp sock %p\n", tmp_sock); | |
251 | ||
252 | if (tmp_sock->sk.sk_state != LLCP_LISTEN) | |
253 | continue; | |
254 | ||
255 | if (tmp_sock->service_name == NULL || | |
256 | tmp_sock->service_name_len == 0) | |
257 | continue; | |
258 | ||
259 | if (tmp_sock->service_name_len != sn_len) | |
260 | continue; | |
261 | ||
262 | if (memcmp(sn, tmp_sock->service_name, sn_len) == 0) { | |
263 | llcp_sock = tmp_sock; | |
264 | break; | |
265 | } | |
266 | } | |
267 | ||
268 | read_unlock(&local->sockets.lock); | |
269 | ||
270 | pr_debug("Found llcp sock %p\n", llcp_sock); | |
271 | ||
272 | return llcp_sock; | |
273 | } | |
274 | ||
d646960f | 275 | u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, |
427a2eb1 | 276 | struct nfc_llcp_sock *sock) |
d646960f SO |
277 | { |
278 | mutex_lock(&local->sdp_lock); | |
279 | ||
280 | if (sock->service_name != NULL && sock->service_name_len > 0) { | |
281 | int ssap = nfc_llcp_wks_sap(sock->service_name, | |
427a2eb1 | 282 | sock->service_name_len); |
d646960f SO |
283 | |
284 | if (ssap > 0) { | |
285 | pr_debug("WKS %d\n", ssap); | |
286 | ||
287 | /* This is a WKS, let's check if it's free */ | |
288 | if (local->local_wks & BIT(ssap)) { | |
289 | mutex_unlock(&local->sdp_lock); | |
290 | ||
291 | return LLCP_SAP_MAX; | |
292 | } | |
293 | ||
1762c17c | 294 | set_bit(ssap, &local->local_wks); |
d646960f SO |
295 | mutex_unlock(&local->sdp_lock); |
296 | ||
297 | return ssap; | |
298 | } | |
299 | ||
300 | /* | |
8f50020e SO |
301 | * Check if there already is a non WKS socket bound |
302 | * to this service name. | |
d646960f | 303 | */ |
8f50020e SO |
304 | if (nfc_llcp_sock_from_sn(local, sock->service_name, |
305 | sock->service_name_len) != NULL) { | |
d646960f SO |
306 | mutex_unlock(&local->sdp_lock); |
307 | ||
308 | return LLCP_SAP_MAX; | |
309 | } | |
310 | ||
d646960f SO |
311 | mutex_unlock(&local->sdp_lock); |
312 | ||
8f50020e | 313 | return LLCP_SDP_UNBOUND; |
d646960f | 314 | |
ebbb16d9 SO |
315 | } else if (sock->ssap != 0 && sock->ssap < LLCP_WKS_NUM_SAP) { |
316 | if (!test_bit(sock->ssap, &local->local_wks)) { | |
317 | set_bit(sock->ssap, &local->local_wks); | |
318 | mutex_unlock(&local->sdp_lock); | |
d646960f | 319 | |
ebbb16d9 | 320 | return sock->ssap; |
d646960f SO |
321 | } |
322 | } | |
323 | ||
324 | mutex_unlock(&local->sdp_lock); | |
325 | ||
326 | return LLCP_SAP_MAX; | |
327 | } | |
328 | ||
329 | u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local) | |
330 | { | |
331 | u8 local_ssap; | |
332 | ||
333 | mutex_lock(&local->sdp_lock); | |
334 | ||
335 | local_ssap = find_first_zero_bit(&local->local_sap, LLCP_LOCAL_NUM_SAP); | |
336 | if (local_ssap == LLCP_LOCAL_NUM_SAP) { | |
337 | mutex_unlock(&local->sdp_lock); | |
338 | return LLCP_SAP_MAX; | |
339 | } | |
340 | ||
1762c17c | 341 | set_bit(local_ssap, &local->local_sap); |
d646960f SO |
342 | |
343 | mutex_unlock(&local->sdp_lock); | |
344 | ||
345 | return local_ssap + LLCP_LOCAL_SAP_OFFSET; | |
346 | } | |
347 | ||
348 | void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap) | |
349 | { | |
350 | u8 local_ssap; | |
351 | unsigned long *sdp; | |
352 | ||
353 | if (ssap < LLCP_WKS_NUM_SAP) { | |
354 | local_ssap = ssap; | |
355 | sdp = &local->local_wks; | |
356 | } else if (ssap < LLCP_LOCAL_NUM_SAP) { | |
8f50020e SO |
357 | atomic_t *client_cnt; |
358 | ||
d646960f SO |
359 | local_ssap = ssap - LLCP_WKS_NUM_SAP; |
360 | sdp = &local->local_sdp; | |
8f50020e SO |
361 | client_cnt = &local->local_sdp_cnt[local_ssap]; |
362 | ||
363 | pr_debug("%d clients\n", atomic_read(client_cnt)); | |
364 | ||
365 | mutex_lock(&local->sdp_lock); | |
366 | ||
367 | if (atomic_dec_and_test(client_cnt)) { | |
368 | struct nfc_llcp_sock *l_sock; | |
369 | ||
370 | pr_debug("No more clients for SAP %d\n", ssap); | |
371 | ||
372 | clear_bit(local_ssap, sdp); | |
373 | ||
374 | /* Find the listening sock and set it back to UNBOUND */ | |
375 | l_sock = nfc_llcp_sock_get(local, ssap, LLCP_SAP_SDP); | |
376 | if (l_sock) { | |
377 | l_sock->ssap = LLCP_SDP_UNBOUND; | |
378 | nfc_llcp_sock_put(l_sock); | |
379 | } | |
380 | } | |
381 | ||
382 | mutex_unlock(&local->sdp_lock); | |
383 | ||
384 | return; | |
d646960f SO |
385 | } else if (ssap < LLCP_MAX_SAP) { |
386 | local_ssap = ssap - LLCP_LOCAL_NUM_SAP; | |
387 | sdp = &local->local_sap; | |
388 | } else { | |
389 | return; | |
390 | } | |
391 | ||
392 | mutex_lock(&local->sdp_lock); | |
393 | ||
1762c17c | 394 | clear_bit(local_ssap, sdp); |
d646960f SO |
395 | |
396 | mutex_unlock(&local->sdp_lock); | |
397 | } | |
398 | ||
8f50020e SO |
399 | static u8 nfc_llcp_reserve_sdp_ssap(struct nfc_llcp_local *local) |
400 | { | |
401 | u8 ssap; | |
402 | ||
403 | mutex_lock(&local->sdp_lock); | |
404 | ||
405 | ssap = find_first_zero_bit(&local->local_sdp, LLCP_SDP_NUM_SAP); | |
406 | if (ssap == LLCP_SDP_NUM_SAP) { | |
407 | mutex_unlock(&local->sdp_lock); | |
408 | ||
409 | return LLCP_SAP_MAX; | |
410 | } | |
411 | ||
412 | pr_debug("SDP ssap %d\n", LLCP_WKS_NUM_SAP + ssap); | |
413 | ||
414 | set_bit(ssap, &local->local_sdp); | |
415 | ||
416 | mutex_unlock(&local->sdp_lock); | |
417 | ||
418 | return LLCP_WKS_NUM_SAP + ssap; | |
419 | } | |
420 | ||
d646960f SO |
421 | static int nfc_llcp_build_gb(struct nfc_llcp_local *local) |
422 | { | |
423 | u8 *gb_cur, *version_tlv, version, version_length; | |
424 | u8 *lto_tlv, lto, lto_length; | |
425 | u8 *wks_tlv, wks_length; | |
56d5876a SO |
426 | u8 *miux_tlv, miux_length; |
427 | __be16 miux; | |
d646960f | 428 | u8 gb_len = 0; |
52da2449 | 429 | int ret = 0; |
d646960f SO |
430 | |
431 | version = LLCP_VERSION_11; | |
432 | version_tlv = nfc_llcp_build_tlv(LLCP_TLV_VERSION, &version, | |
427a2eb1 | 433 | 1, &version_length); |
d646960f SO |
434 | gb_len += version_length; |
435 | ||
436 | /* 1500 ms */ | |
437 | lto = 150; | |
91b0ade1 | 438 | lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, <o, 1, <o_length); |
d646960f SO |
439 | gb_len += lto_length; |
440 | ||
441 | pr_debug("Local wks 0x%lx\n", local->local_wks); | |
442 | wks_tlv = nfc_llcp_build_tlv(LLCP_TLV_WKS, (u8 *)&local->local_wks, 2, | |
427a2eb1 | 443 | &wks_length); |
d646960f SO |
444 | gb_len += wks_length; |
445 | ||
56d5876a SO |
446 | miux = cpu_to_be16(LLCP_MAX_MIUX); |
447 | miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0, | |
448 | &miux_length); | |
449 | gb_len += miux_length; | |
450 | ||
d646960f SO |
451 | gb_len += ARRAY_SIZE(llcp_magic); |
452 | ||
453 | if (gb_len > NFC_MAX_GT_LEN) { | |
52da2449 WY |
454 | ret = -EINVAL; |
455 | goto out; | |
d646960f SO |
456 | } |
457 | ||
458 | gb_cur = local->gb; | |
459 | ||
460 | memcpy(gb_cur, llcp_magic, ARRAY_SIZE(llcp_magic)); | |
461 | gb_cur += ARRAY_SIZE(llcp_magic); | |
462 | ||
463 | memcpy(gb_cur, version_tlv, version_length); | |
464 | gb_cur += version_length; | |
465 | ||
466 | memcpy(gb_cur, lto_tlv, lto_length); | |
467 | gb_cur += lto_length; | |
468 | ||
469 | memcpy(gb_cur, wks_tlv, wks_length); | |
470 | gb_cur += wks_length; | |
471 | ||
56d5876a SO |
472 | memcpy(gb_cur, miux_tlv, miux_length); |
473 | gb_cur += miux_length; | |
474 | ||
52da2449 WY |
475 | local->gb_len = gb_len; |
476 | ||
477 | out: | |
d646960f SO |
478 | kfree(version_tlv); |
479 | kfree(lto_tlv); | |
52da2449 WY |
480 | kfree(wks_tlv); |
481 | kfree(miux_tlv); | |
d646960f | 482 | |
52da2449 | 483 | return ret; |
d646960f SO |
484 | } |
485 | ||
b8e7a06d SO |
486 | u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len) |
487 | { | |
488 | struct nfc_llcp_local *local; | |
489 | ||
490 | local = nfc_llcp_find_local(dev); | |
491 | if (local == NULL) { | |
492 | *general_bytes_len = 0; | |
493 | return NULL; | |
494 | } | |
495 | ||
496 | nfc_llcp_build_gb(local); | |
497 | ||
498 | *general_bytes_len = local->gb_len; | |
499 | ||
500 | return local->gb; | |
501 | } | |
502 | ||
d646960f SO |
503 | int nfc_llcp_set_remote_gb(struct nfc_dev *dev, u8 *gb, u8 gb_len) |
504 | { | |
505 | struct nfc_llcp_local *local = nfc_llcp_find_local(dev); | |
506 | ||
507 | if (local == NULL) { | |
508 | pr_err("No LLCP device\n"); | |
509 | return -ENODEV; | |
510 | } | |
511 | ||
512 | memset(local->remote_gb, 0, NFC_MAX_GT_LEN); | |
513 | memcpy(local->remote_gb, gb, gb_len); | |
514 | local->remote_gb_len = gb_len; | |
515 | ||
427a2eb1 | 516 | if (local->remote_gb == NULL || local->remote_gb_len == 0) |
d646960f SO |
517 | return -ENODEV; |
518 | ||
519 | if (memcmp(local->remote_gb, llcp_magic, 3)) { | |
520 | pr_err("MAC does not support LLCP\n"); | |
521 | return -EINVAL; | |
522 | } | |
523 | ||
7a06e586 SO |
524 | return nfc_llcp_parse_gb_tlv(local, |
525 | &local->remote_gb[3], | |
526 | local->remote_gb_len - 3); | |
d646960f SO |
527 | } |
528 | ||
d646960f SO |
529 | static u8 nfc_llcp_dsap(struct sk_buff *pdu) |
530 | { | |
531 | return (pdu->data[0] & 0xfc) >> 2; | |
532 | } | |
533 | ||
534 | static u8 nfc_llcp_ptype(struct sk_buff *pdu) | |
535 | { | |
536 | return ((pdu->data[0] & 0x03) << 2) | ((pdu->data[1] & 0xc0) >> 6); | |
537 | } | |
538 | ||
539 | static u8 nfc_llcp_ssap(struct sk_buff *pdu) | |
540 | { | |
541 | return pdu->data[1] & 0x3f; | |
542 | } | |
543 | ||
544 | static u8 nfc_llcp_ns(struct sk_buff *pdu) | |
545 | { | |
546 | return pdu->data[2] >> 4; | |
547 | } | |
548 | ||
549 | static u8 nfc_llcp_nr(struct sk_buff *pdu) | |
550 | { | |
551 | return pdu->data[2] & 0xf; | |
552 | } | |
553 | ||
554 | static void nfc_llcp_set_nrns(struct nfc_llcp_sock *sock, struct sk_buff *pdu) | |
555 | { | |
279cf174 | 556 | pdu->data[2] = (sock->send_n << 4) | (sock->recv_n); |
d646960f SO |
557 | sock->send_n = (sock->send_n + 1) % 16; |
558 | sock->recv_ack_n = (sock->recv_n - 1) % 16; | |
559 | } | |
560 | ||
84457960 SO |
561 | static void nfc_llcp_tx_work(struct work_struct *work) |
562 | { | |
563 | struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, | |
564 | tx_work); | |
565 | struct sk_buff *skb; | |
566 | struct sock *sk; | |
567 | struct nfc_llcp_sock *llcp_sock; | |
568 | ||
569 | skb = skb_dequeue(&local->tx_queue); | |
570 | if (skb != NULL) { | |
571 | sk = skb->sk; | |
572 | llcp_sock = nfc_llcp_sock(sk); | |
573 | if (llcp_sock != NULL) { | |
574 | int ret; | |
575 | ||
576 | pr_debug("Sending pending skb\n"); | |
577 | print_hex_dump(KERN_DEBUG, "LLCP Tx: ", | |
578 | DUMP_PREFIX_OFFSET, 16, 1, | |
579 | skb->data, skb->len, true); | |
580 | ||
581 | ret = nfc_data_exchange(local->dev, local->target_idx, | |
582 | skb, nfc_llcp_recv, local); | |
583 | ||
584 | if (!ret && nfc_llcp_ptype(skb) == LLCP_PDU_I) { | |
585 | skb = skb_get(skb); | |
586 | skb_queue_tail(&llcp_sock->tx_pending_queue, | |
587 | skb); | |
588 | } | |
589 | } else { | |
590 | nfc_llcp_send_symm(local->dev); | |
591 | } | |
592 | } else { | |
593 | nfc_llcp_send_symm(local->dev); | |
594 | } | |
595 | ||
596 | mod_timer(&local->link_timer, | |
597 | jiffies + msecs_to_jiffies(2 * local->remote_lto)); | |
598 | } | |
599 | ||
a69f32af SO |
600 | static struct nfc_llcp_sock *nfc_llcp_connecting_sock_get(struct nfc_llcp_local *local, |
601 | u8 ssap) | |
602 | { | |
603 | struct sock *sk; | |
604 | struct nfc_llcp_sock *llcp_sock; | |
605 | struct hlist_node *node; | |
606 | ||
607 | read_lock(&local->connecting_sockets.lock); | |
608 | ||
609 | sk_for_each(sk, node, &local->connecting_sockets.head) { | |
610 | llcp_sock = nfc_llcp_sock(sk); | |
611 | ||
5a0f6f3b SO |
612 | if (llcp_sock->ssap == ssap) { |
613 | sock_hold(&llcp_sock->sk); | |
a69f32af | 614 | goto out; |
5a0f6f3b | 615 | } |
a69f32af SO |
616 | } |
617 | ||
618 | llcp_sock = NULL; | |
619 | ||
620 | out: | |
621 | read_unlock(&local->connecting_sockets.lock); | |
622 | ||
a69f32af SO |
623 | return llcp_sock; |
624 | } | |
625 | ||
a69f32af SO |
626 | static struct nfc_llcp_sock *nfc_llcp_sock_get_sn(struct nfc_llcp_local *local, |
627 | u8 *sn, size_t sn_len) | |
628 | { | |
a69f32af SO |
629 | struct nfc_llcp_sock *llcp_sock; |
630 | ||
8f50020e | 631 | llcp_sock = nfc_llcp_sock_from_sn(local, sn, sn_len); |
d646960f | 632 | |
a69f32af SO |
633 | if (llcp_sock == NULL) |
634 | return NULL; | |
d646960f | 635 | |
a69f32af SO |
636 | sock_hold(&llcp_sock->sk); |
637 | ||
638 | return llcp_sock; | |
d646960f SO |
639 | } |
640 | ||
d646960f SO |
641 | static u8 *nfc_llcp_connect_sn(struct sk_buff *skb, size_t *sn_len) |
642 | { | |
643 | u8 *tlv = &skb->data[2], type, length; | |
644 | size_t tlv_array_len = skb->len - LLCP_HEADER_SIZE, offset = 0; | |
645 | ||
646 | while (offset < tlv_array_len) { | |
647 | type = tlv[0]; | |
648 | length = tlv[1]; | |
649 | ||
650 | pr_debug("type 0x%x length %d\n", type, length); | |
651 | ||
652 | if (type == LLCP_TLV_SN) { | |
653 | *sn_len = length; | |
654 | return &tlv[2]; | |
655 | } | |
656 | ||
657 | offset += length + 2; | |
658 | tlv += length + 2; | |
659 | } | |
660 | ||
661 | return NULL; | |
662 | } | |
663 | ||
664 | static void nfc_llcp_recv_connect(struct nfc_llcp_local *local, | |
427a2eb1 | 665 | struct sk_buff *skb) |
d646960f SO |
666 | { |
667 | struct sock *new_sk, *parent; | |
668 | struct nfc_llcp_sock *sock, *new_sock; | |
a69f32af | 669 | u8 dsap, ssap, reason; |
d646960f SO |
670 | |
671 | dsap = nfc_llcp_dsap(skb); | |
672 | ssap = nfc_llcp_ssap(skb); | |
673 | ||
674 | pr_debug("%d %d\n", dsap, ssap); | |
675 | ||
d646960f | 676 | if (dsap != LLCP_SAP_SDP) { |
a69f32af SO |
677 | sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP); |
678 | if (sock == NULL || sock->sk.sk_state != LLCP_LISTEN) { | |
d646960f SO |
679 | reason = LLCP_DM_NOBOUND; |
680 | goto fail; | |
681 | } | |
d646960f SO |
682 | } else { |
683 | u8 *sn; | |
684 | size_t sn_len; | |
685 | ||
686 | sn = nfc_llcp_connect_sn(skb, &sn_len); | |
687 | if (sn == NULL) { | |
688 | reason = LLCP_DM_NOBOUND; | |
689 | goto fail; | |
690 | } | |
691 | ||
692 | pr_debug("Service name length %zu\n", sn_len); | |
693 | ||
a69f32af SO |
694 | sock = nfc_llcp_sock_get_sn(local, sn, sn_len); |
695 | if (sock == NULL) { | |
696 | reason = LLCP_DM_NOBOUND; | |
697 | goto fail; | |
d646960f | 698 | } |
d646960f SO |
699 | } |
700 | ||
a69f32af | 701 | lock_sock(&sock->sk); |
d646960f | 702 | |
d646960f SO |
703 | parent = &sock->sk; |
704 | ||
705 | if (sk_acceptq_is_full(parent)) { | |
706 | reason = LLCP_DM_REJ; | |
707 | release_sock(&sock->sk); | |
708 | sock_put(&sock->sk); | |
709 | goto fail; | |
710 | } | |
711 | ||
8f50020e SO |
712 | if (sock->ssap == LLCP_SDP_UNBOUND) { |
713 | u8 ssap = nfc_llcp_reserve_sdp_ssap(local); | |
714 | ||
715 | pr_debug("First client, reserving %d\n", ssap); | |
716 | ||
717 | if (ssap == LLCP_SAP_MAX) { | |
718 | reason = LLCP_DM_REJ; | |
719 | release_sock(&sock->sk); | |
720 | sock_put(&sock->sk); | |
721 | goto fail; | |
722 | } | |
723 | ||
724 | sock->ssap = ssap; | |
725 | } | |
726 | ||
427a2eb1 | 727 | new_sk = nfc_llcp_sock_alloc(NULL, parent->sk_type, GFP_ATOMIC); |
d646960f SO |
728 | if (new_sk == NULL) { |
729 | reason = LLCP_DM_REJ; | |
730 | release_sock(&sock->sk); | |
731 | sock_put(&sock->sk); | |
732 | goto fail; | |
733 | } | |
734 | ||
735 | new_sock = nfc_llcp_sock(new_sk); | |
736 | new_sock->dev = local->dev; | |
c7aa1225 | 737 | new_sock->local = nfc_llcp_local_get(local); |
93d7e490 | 738 | new_sock->miu = local->remote_miu; |
d646960f | 739 | new_sock->nfc_protocol = sock->nfc_protocol; |
d646960f | 740 | new_sock->dsap = ssap; |
025f1520 | 741 | new_sock->target_idx = local->target_idx; |
d646960f | 742 | new_sock->parent = parent; |
8f50020e SO |
743 | new_sock->ssap = sock->ssap; |
744 | if (sock->ssap < LLCP_LOCAL_NUM_SAP && sock->ssap >= LLCP_WKS_NUM_SAP) { | |
745 | atomic_t *client_count; | |
746 | ||
747 | pr_debug("reserved_ssap %d for %p\n", sock->ssap, new_sock); | |
748 | ||
749 | client_count = | |
750 | &local->local_sdp_cnt[sock->ssap - LLCP_WKS_NUM_SAP]; | |
751 | ||
752 | atomic_inc(client_count); | |
753 | new_sock->reserved_ssap = sock->ssap; | |
754 | } | |
d646960f | 755 | |
7a06e586 SO |
756 | nfc_llcp_parse_connection_tlv(new_sock, &skb->data[LLCP_HEADER_SIZE], |
757 | skb->len - LLCP_HEADER_SIZE); | |
758 | ||
d646960f SO |
759 | pr_debug("new sock %p sk %p\n", new_sock, &new_sock->sk); |
760 | ||
a69f32af | 761 | nfc_llcp_sock_link(&local->sockets, new_sk); |
d646960f SO |
762 | |
763 | nfc_llcp_accept_enqueue(&sock->sk, new_sk); | |
764 | ||
765 | nfc_get_device(local->dev->idx); | |
766 | ||
767 | new_sk->sk_state = LLCP_CONNECTED; | |
768 | ||
769 | /* Wake the listening processes */ | |
770 | parent->sk_data_ready(parent, 0); | |
771 | ||
772 | /* Send CC */ | |
773 | nfc_llcp_send_cc(new_sock); | |
774 | ||
775 | release_sock(&sock->sk); | |
776 | sock_put(&sock->sk); | |
777 | ||
778 | return; | |
779 | ||
780 | fail: | |
781 | /* Send DM */ | |
782 | nfc_llcp_send_dm(local, dsap, ssap, reason); | |
783 | ||
784 | return; | |
785 | ||
786 | } | |
787 | ||
d094afa1 | 788 | int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock) |
4722d2b7 | 789 | { |
d094afa1 | 790 | int nr_frames = 0; |
4722d2b7 SO |
791 | struct nfc_llcp_local *local = sock->local; |
792 | ||
793 | pr_debug("Remote ready %d tx queue len %d remote rw %d", | |
427a2eb1 | 794 | sock->remote_ready, skb_queue_len(&sock->tx_pending_queue), |
7a06e586 | 795 | sock->rw); |
4722d2b7 SO |
796 | |
797 | /* Try to queue some I frames for transmission */ | |
798 | while (sock->remote_ready && | |
7a06e586 | 799 | skb_queue_len(&sock->tx_pending_queue) < sock->rw) { |
84457960 | 800 | struct sk_buff *pdu; |
4722d2b7 SO |
801 | |
802 | pdu = skb_dequeue(&sock->tx_queue); | |
803 | if (pdu == NULL) | |
804 | break; | |
805 | ||
806 | /* Update N(S)/N(R) */ | |
807 | nfc_llcp_set_nrns(sock, pdu); | |
808 | ||
4722d2b7 | 809 | skb_queue_tail(&local->tx_queue, pdu); |
d094afa1 | 810 | nr_frames++; |
4722d2b7 | 811 | } |
d094afa1 SO |
812 | |
813 | return nr_frames; | |
4722d2b7 SO |
814 | } |
815 | ||
d646960f | 816 | static void nfc_llcp_recv_hdlc(struct nfc_llcp_local *local, |
427a2eb1 | 817 | struct sk_buff *skb) |
d646960f SO |
818 | { |
819 | struct nfc_llcp_sock *llcp_sock; | |
820 | struct sock *sk; | |
821 | u8 dsap, ssap, ptype, ns, nr; | |
822 | ||
823 | ptype = nfc_llcp_ptype(skb); | |
824 | dsap = nfc_llcp_dsap(skb); | |
825 | ssap = nfc_llcp_ssap(skb); | |
826 | ns = nfc_llcp_ns(skb); | |
827 | nr = nfc_llcp_nr(skb); | |
828 | ||
829 | pr_debug("%d %d R %d S %d\n", dsap, ssap, nr, ns); | |
830 | ||
831 | llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); | |
832 | if (llcp_sock == NULL) { | |
833 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); | |
834 | return; | |
835 | } | |
836 | ||
837 | sk = &llcp_sock->sk; | |
838 | lock_sock(sk); | |
839 | if (sk->sk_state == LLCP_CLOSED) { | |
840 | release_sock(sk); | |
841 | nfc_llcp_sock_put(llcp_sock); | |
842 | } | |
843 | ||
d646960f SO |
844 | /* Pass the payload upstream */ |
845 | if (ptype == LLCP_PDU_I) { | |
846 | pr_debug("I frame, queueing on %p\n", &llcp_sock->sk); | |
847 | ||
53aef920 SO |
848 | if (ns == llcp_sock->recv_n) |
849 | llcp_sock->recv_n = (llcp_sock->recv_n + 1) % 16; | |
850 | else | |
851 | pr_err("Received out of sequence I PDU\n"); | |
852 | ||
d646960f SO |
853 | skb_pull(skb, LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE); |
854 | if (sock_queue_rcv_skb(&llcp_sock->sk, skb)) { | |
855 | pr_err("receive queue is full\n"); | |
856 | skb_queue_head(&llcp_sock->tx_backlog_queue, skb); | |
857 | } | |
858 | } | |
859 | ||
860 | /* Remove skbs from the pending queue */ | |
861 | if (llcp_sock->send_ack_n != nr) { | |
862 | struct sk_buff *s, *tmp; | |
863 | ||
864 | llcp_sock->send_ack_n = nr; | |
865 | ||
84457960 SO |
866 | /* Remove and free all skbs until ns == nr */ |
867 | skb_queue_walk_safe(&llcp_sock->tx_pending_queue, s, tmp) { | |
868 | skb_unlink(s, &llcp_sock->tx_pending_queue); | |
869 | kfree_skb(s); | |
870 | ||
871 | if (nfc_llcp_ns(s) == nr) | |
872 | break; | |
873 | } | |
874 | ||
875 | /* Re-queue the remaining skbs for transmission */ | |
876 | skb_queue_reverse_walk_safe(&llcp_sock->tx_pending_queue, | |
877 | s, tmp) { | |
878 | skb_unlink(s, &llcp_sock->tx_pending_queue); | |
879 | skb_queue_head(&local->tx_queue, s); | |
880 | } | |
d646960f SO |
881 | } |
882 | ||
53aef920 SO |
883 | if (ptype == LLCP_PDU_RR) |
884 | llcp_sock->remote_ready = true; | |
427a2eb1 | 885 | else if (ptype == LLCP_PDU_RNR) |
53aef920 SO |
886 | llcp_sock->remote_ready = false; |
887 | ||
56af2568 | 888 | if (nfc_llcp_queue_i_frames(llcp_sock) == 0 && ptype == LLCP_PDU_I) |
d094afa1 | 889 | nfc_llcp_send_rr(llcp_sock); |
d646960f SO |
890 | |
891 | release_sock(sk); | |
892 | nfc_llcp_sock_put(llcp_sock); | |
893 | } | |
894 | ||
895 | static void nfc_llcp_recv_disc(struct nfc_llcp_local *local, | |
427a2eb1 | 896 | struct sk_buff *skb) |
d646960f SO |
897 | { |
898 | struct nfc_llcp_sock *llcp_sock; | |
899 | struct sock *sk; | |
900 | u8 dsap, ssap; | |
901 | ||
902 | dsap = nfc_llcp_dsap(skb); | |
903 | ssap = nfc_llcp_ssap(skb); | |
904 | ||
905 | llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); | |
906 | if (llcp_sock == NULL) { | |
907 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); | |
908 | return; | |
909 | } | |
910 | ||
911 | sk = &llcp_sock->sk; | |
912 | lock_sock(sk); | |
913 | if (sk->sk_state == LLCP_CLOSED) { | |
914 | release_sock(sk); | |
915 | nfc_llcp_sock_put(llcp_sock); | |
916 | } | |
917 | ||
d646960f SO |
918 | if (sk->sk_state == LLCP_CONNECTED) { |
919 | nfc_put_device(local->dev); | |
920 | sk->sk_state = LLCP_CLOSED; | |
921 | sk->sk_state_change(sk); | |
922 | } | |
923 | ||
924 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_DISC); | |
925 | ||
926 | release_sock(sk); | |
927 | nfc_llcp_sock_put(llcp_sock); | |
928 | } | |
929 | ||
427a2eb1 | 930 | static void nfc_llcp_recv_cc(struct nfc_llcp_local *local, struct sk_buff *skb) |
d646960f SO |
931 | { |
932 | struct nfc_llcp_sock *llcp_sock; | |
ff353d86 | 933 | struct sock *sk; |
d646960f SO |
934 | u8 dsap, ssap; |
935 | ||
d646960f SO |
936 | dsap = nfc_llcp_dsap(skb); |
937 | ssap = nfc_llcp_ssap(skb); | |
938 | ||
a69f32af | 939 | llcp_sock = nfc_llcp_connecting_sock_get(local, dsap); |
d646960f SO |
940 | if (llcp_sock == NULL) { |
941 | pr_err("Invalid CC\n"); | |
942 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); | |
943 | ||
944 | return; | |
945 | } | |
946 | ||
ff353d86 | 947 | sk = &llcp_sock->sk; |
d646960f | 948 | |
a69f32af SO |
949 | /* Unlink from connecting and link to the client array */ |
950 | nfc_llcp_sock_unlink(&local->connecting_sockets, sk); | |
951 | nfc_llcp_sock_link(&local->sockets, sk); | |
952 | llcp_sock->dsap = ssap; | |
953 | ||
7a06e586 SO |
954 | nfc_llcp_parse_connection_tlv(llcp_sock, &skb->data[LLCP_HEADER_SIZE], |
955 | skb->len - LLCP_HEADER_SIZE); | |
d646960f | 956 | |
ff353d86 SO |
957 | sk->sk_state = LLCP_CONNECTED; |
958 | sk->sk_state_change(sk); | |
959 | ||
d646960f SO |
960 | nfc_llcp_sock_put(llcp_sock); |
961 | } | |
962 | ||
5c0560b7 SO |
963 | static void nfc_llcp_recv_dm(struct nfc_llcp_local *local, struct sk_buff *skb) |
964 | { | |
965 | struct nfc_llcp_sock *llcp_sock; | |
966 | struct sock *sk; | |
967 | u8 dsap, ssap, reason; | |
968 | ||
969 | dsap = nfc_llcp_dsap(skb); | |
970 | ssap = nfc_llcp_ssap(skb); | |
971 | reason = skb->data[2]; | |
972 | ||
973 | pr_debug("%d %d reason %d\n", ssap, dsap, reason); | |
974 | ||
975 | switch (reason) { | |
976 | case LLCP_DM_NOBOUND: | |
977 | case LLCP_DM_REJ: | |
978 | llcp_sock = nfc_llcp_connecting_sock_get(local, dsap); | |
979 | break; | |
980 | ||
981 | default: | |
982 | llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); | |
983 | break; | |
984 | } | |
985 | ||
986 | if (llcp_sock == NULL) { | |
987 | pr_err("Invalid DM\n"); | |
988 | return; | |
989 | } | |
990 | ||
991 | sk = &llcp_sock->sk; | |
992 | ||
993 | sk->sk_err = ENXIO; | |
994 | sk->sk_state = LLCP_CLOSED; | |
995 | sk->sk_state_change(sk); | |
996 | ||
997 | nfc_llcp_sock_put(llcp_sock); | |
998 | ||
999 | return; | |
1000 | } | |
1001 | ||
d646960f SO |
1002 | static void nfc_llcp_rx_work(struct work_struct *work) |
1003 | { | |
1004 | struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, | |
427a2eb1 | 1005 | rx_work); |
d646960f SO |
1006 | u8 dsap, ssap, ptype; |
1007 | struct sk_buff *skb; | |
1008 | ||
1009 | skb = local->rx_pending; | |
1010 | if (skb == NULL) { | |
1011 | pr_debug("No pending SKB\n"); | |
1012 | return; | |
1013 | } | |
1014 | ||
1015 | ptype = nfc_llcp_ptype(skb); | |
1016 | dsap = nfc_llcp_dsap(skb); | |
1017 | ssap = nfc_llcp_ssap(skb); | |
1018 | ||
1019 | pr_debug("ptype 0x%x dsap 0x%x ssap 0x%x\n", ptype, dsap, ssap); | |
1020 | ||
4be646ec SO |
1021 | if (ptype != LLCP_PDU_SYMM) |
1022 | print_hex_dump(KERN_DEBUG, "LLCP Rx: ", DUMP_PREFIX_OFFSET, | |
1023 | 16, 1, skb->data, skb->len, true); | |
1024 | ||
d646960f SO |
1025 | switch (ptype) { |
1026 | case LLCP_PDU_SYMM: | |
1027 | pr_debug("SYMM\n"); | |
1028 | break; | |
1029 | ||
1030 | case LLCP_PDU_CONNECT: | |
1031 | pr_debug("CONNECT\n"); | |
1032 | nfc_llcp_recv_connect(local, skb); | |
1033 | break; | |
1034 | ||
1035 | case LLCP_PDU_DISC: | |
1036 | pr_debug("DISC\n"); | |
1037 | nfc_llcp_recv_disc(local, skb); | |
1038 | break; | |
1039 | ||
1040 | case LLCP_PDU_CC: | |
1041 | pr_debug("CC\n"); | |
1042 | nfc_llcp_recv_cc(local, skb); | |
1043 | break; | |
1044 | ||
5c0560b7 SO |
1045 | case LLCP_PDU_DM: |
1046 | pr_debug("DM\n"); | |
1047 | nfc_llcp_recv_dm(local, skb); | |
1048 | break; | |
1049 | ||
d646960f SO |
1050 | case LLCP_PDU_I: |
1051 | case LLCP_PDU_RR: | |
53aef920 | 1052 | case LLCP_PDU_RNR: |
d646960f SO |
1053 | pr_debug("I frame\n"); |
1054 | nfc_llcp_recv_hdlc(local, skb); | |
1055 | break; | |
1056 | ||
1057 | } | |
1058 | ||
474fee3d | 1059 | queue_work(system_nrt_wq, &local->tx_work); |
d646960f SO |
1060 | kfree_skb(local->rx_pending); |
1061 | local->rx_pending = NULL; | |
1062 | ||
1063 | return; | |
1064 | } | |
1065 | ||
1066 | void nfc_llcp_recv(void *data, struct sk_buff *skb, int err) | |
1067 | { | |
1068 | struct nfc_llcp_local *local = (struct nfc_llcp_local *) data; | |
1069 | ||
1070 | pr_debug("Received an LLCP PDU\n"); | |
1071 | if (err < 0) { | |
427a2eb1 | 1072 | pr_err("err %d\n", err); |
d646960f SO |
1073 | return; |
1074 | } | |
1075 | ||
1076 | local->rx_pending = skb_get(skb); | |
1077 | del_timer(&local->link_timer); | |
474fee3d | 1078 | queue_work(system_nrt_wq, &local->rx_work); |
d646960f SO |
1079 | |
1080 | return; | |
1081 | } | |
1082 | ||
73167ced SO |
1083 | int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb) |
1084 | { | |
1085 | struct nfc_llcp_local *local; | |
1086 | ||
1087 | local = nfc_llcp_find_local(dev); | |
1088 | if (local == NULL) | |
1089 | return -ENODEV; | |
1090 | ||
1091 | local->rx_pending = skb_get(skb); | |
1092 | del_timer(&local->link_timer); | |
474fee3d | 1093 | queue_work(system_nrt_wq, &local->rx_work); |
73167ced SO |
1094 | |
1095 | return 0; | |
1096 | } | |
1097 | ||
d646960f SO |
1098 | void nfc_llcp_mac_is_down(struct nfc_dev *dev) |
1099 | { | |
1100 | struct nfc_llcp_local *local; | |
1101 | ||
1102 | local = nfc_llcp_find_local(dev); | |
1103 | if (local == NULL) | |
1104 | return; | |
1105 | ||
1106 | /* Close and purge all existing sockets */ | |
4d22ea15 | 1107 | nfc_llcp_socket_release(local, true); |
d646960f SO |
1108 | } |
1109 | ||
1110 | void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx, | |
1111 | u8 comm_mode, u8 rf_mode) | |
1112 | { | |
1113 | struct nfc_llcp_local *local; | |
1114 | ||
1115 | pr_debug("rf mode %d\n", rf_mode); | |
1116 | ||
1117 | local = nfc_llcp_find_local(dev); | |
1118 | if (local == NULL) | |
1119 | return; | |
1120 | ||
1121 | local->target_idx = target_idx; | |
1122 | local->comm_mode = comm_mode; | |
1123 | local->rf_mode = rf_mode; | |
1124 | ||
1125 | if (rf_mode == NFC_RF_INITIATOR) { | |
1126 | pr_debug("Queueing Tx work\n"); | |
1127 | ||
474fee3d | 1128 | queue_work(system_nrt_wq, &local->tx_work); |
d646960f SO |
1129 | } else { |
1130 | mod_timer(&local->link_timer, | |
427a2eb1 | 1131 | jiffies + msecs_to_jiffies(local->remote_lto)); |
d646960f SO |
1132 | } |
1133 | } | |
1134 | ||
1135 | int nfc_llcp_register_device(struct nfc_dev *ndev) | |
1136 | { | |
d646960f | 1137 | struct nfc_llcp_local *local; |
d646960f SO |
1138 | |
1139 | local = kzalloc(sizeof(struct nfc_llcp_local), GFP_KERNEL); | |
1140 | if (local == NULL) | |
1141 | return -ENOMEM; | |
1142 | ||
1143 | local->dev = ndev; | |
1144 | INIT_LIST_HEAD(&local->list); | |
c7aa1225 | 1145 | kref_init(&local->ref); |
d646960f | 1146 | mutex_init(&local->sdp_lock); |
d646960f SO |
1147 | init_timer(&local->link_timer); |
1148 | local->link_timer.data = (unsigned long) local; | |
1149 | local->link_timer.function = nfc_llcp_symm_timer; | |
1150 | ||
1151 | skb_queue_head_init(&local->tx_queue); | |
1152 | INIT_WORK(&local->tx_work, nfc_llcp_tx_work); | |
d646960f SO |
1153 | |
1154 | local->rx_pending = NULL; | |
1155 | INIT_WORK(&local->rx_work, nfc_llcp_rx_work); | |
d646960f SO |
1156 | |
1157 | INIT_WORK(&local->timeout_work, nfc_llcp_timeout_work); | |
d646960f | 1158 | |
fe235b58 SJ |
1159 | rwlock_init(&local->sockets.lock); |
1160 | rwlock_init(&local->connecting_sockets.lock); | |
a69f32af | 1161 | |
d646960f SO |
1162 | nfc_llcp_build_gb(local); |
1163 | ||
1164 | local->remote_miu = LLCP_DEFAULT_MIU; | |
1165 | local->remote_lto = LLCP_DEFAULT_LTO; | |
d646960f SO |
1166 | |
1167 | list_add(&llcp_devices, &local->list); | |
1168 | ||
d646960f SO |
1169 | return 0; |
1170 | } | |
1171 | ||
1172 | void nfc_llcp_unregister_device(struct nfc_dev *dev) | |
1173 | { | |
1174 | struct nfc_llcp_local *local = nfc_llcp_find_local(dev); | |
1175 | ||
1176 | if (local == NULL) { | |
1177 | pr_debug("No such device\n"); | |
1178 | return; | |
1179 | } | |
1180 | ||
c7aa1225 | 1181 | nfc_llcp_local_put(local); |
d646960f SO |
1182 | } |
1183 | ||
1184 | int __init nfc_llcp_init(void) | |
1185 | { | |
1186 | INIT_LIST_HEAD(&llcp_devices); | |
1187 | ||
1188 | return nfc_llcp_sock_init(); | |
1189 | } | |
1190 | ||
1191 | void nfc_llcp_exit(void) | |
1192 | { | |
1193 | nfc_llcp_sock_exit(); | |
1194 | } |